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 dwarf_die_debug. */
82 static unsigned int dwarf_read_debug
= 0;
84 /* When non-zero, dump DIEs after they are read in. */
85 static unsigned int dwarf_die_debug
= 0;
87 /* When non-zero, dump line number entries as they are read in. */
88 static unsigned int dwarf_line_debug
= 0;
90 /* When non-zero, cross-check physname against demangler. */
91 static int check_physname
= 0;
93 /* When non-zero, do not reject deprecated .gdb_index sections. */
94 static int use_deprecated_index_sections
= 0;
96 static const struct objfile_data
*dwarf2_objfile_data_key
;
98 /* The "aclass" indices for various kinds of computed DWARF symbols. */
100 static int dwarf2_locexpr_index
;
101 static int dwarf2_loclist_index
;
102 static int dwarf2_locexpr_block_index
;
103 static int dwarf2_loclist_block_index
;
105 /* A descriptor for dwarf sections.
107 S.ASECTION, SIZE are typically initialized when the objfile is first
108 scanned. BUFFER, READIN are filled in later when the section is read.
109 If the section contained compressed data then SIZE is updated to record
110 the uncompressed size of the section.
112 DWP file format V2 introduces a wrinkle that is easiest to handle by
113 creating the concept of virtual sections contained within a real section.
114 In DWP V2 the sections of the input DWO files are concatenated together
115 into one section, but section offsets are kept relative to the original
117 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
118 the real section this "virtual" section is contained in, and BUFFER,SIZE
119 describe the virtual section. */
121 struct dwarf2_section_info
125 /* If this is a real section, the bfd section. */
127 /* If this is a virtual section, pointer to the containing ("real")
129 struct dwarf2_section_info
*containing_section
;
131 /* Pointer to section data, only valid if readin. */
132 const gdb_byte
*buffer
;
133 /* The size of the section, real or virtual. */
135 /* If this is a virtual section, the offset in the real section.
136 Only valid if is_virtual. */
137 bfd_size_type virtual_offset
;
138 /* True if we have tried to read this section. */
140 /* True if this is a virtual section, False otherwise.
141 This specifies which of s.asection and s.containing_section to use. */
145 typedef struct dwarf2_section_info dwarf2_section_info_def
;
146 DEF_VEC_O (dwarf2_section_info_def
);
148 /* All offsets in the index are of this type. It must be
149 architecture-independent. */
150 typedef uint32_t offset_type
;
152 DEF_VEC_I (offset_type
);
154 /* Ensure only legit values are used. */
155 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
157 gdb_assert ((unsigned int) (value) <= 1); \
158 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
161 /* Ensure only legit values are used. */
162 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
164 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
165 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
166 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
169 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
170 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
172 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
173 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
176 /* A description of the mapped index. The file format is described in
177 a comment by the code that writes the index. */
180 /* Index data format version. */
183 /* The total length of the buffer. */
186 /* A pointer to the address table data. */
187 const gdb_byte
*address_table
;
189 /* Size of the address table data in bytes. */
190 offset_type address_table_size
;
192 /* The symbol table, implemented as a hash table. */
193 const offset_type
*symbol_table
;
195 /* Size in slots, each slot is 2 offset_types. */
196 offset_type symbol_table_slots
;
198 /* A pointer to the constant pool. */
199 const char *constant_pool
;
202 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
203 DEF_VEC_P (dwarf2_per_cu_ptr
);
207 int nr_uniq_abbrev_tables
;
209 int nr_symtab_sharers
;
210 int nr_stmt_less_type_units
;
211 int nr_all_type_units_reallocs
;
214 /* Collection of data recorded per objfile.
215 This hangs off of dwarf2_objfile_data_key. */
217 struct dwarf2_per_objfile
219 struct dwarf2_section_info info
;
220 struct dwarf2_section_info abbrev
;
221 struct dwarf2_section_info line
;
222 struct dwarf2_section_info loc
;
223 struct dwarf2_section_info macinfo
;
224 struct dwarf2_section_info macro
;
225 struct dwarf2_section_info str
;
226 struct dwarf2_section_info ranges
;
227 struct dwarf2_section_info addr
;
228 struct dwarf2_section_info frame
;
229 struct dwarf2_section_info eh_frame
;
230 struct dwarf2_section_info gdb_index
;
232 VEC (dwarf2_section_info_def
) *types
;
235 struct objfile
*objfile
;
237 /* Table of all the compilation units. This is used to locate
238 the target compilation unit of a particular reference. */
239 struct dwarf2_per_cu_data
**all_comp_units
;
241 /* The number of compilation units in ALL_COMP_UNITS. */
244 /* The number of .debug_types-related CUs. */
247 /* The number of elements allocated in all_type_units.
248 If there are skeleton-less TUs, we add them to all_type_units lazily. */
249 int n_allocated_type_units
;
251 /* The .debug_types-related CUs (TUs).
252 This is stored in malloc space because we may realloc it. */
253 struct signatured_type
**all_type_units
;
255 /* Table of struct type_unit_group objects.
256 The hash key is the DW_AT_stmt_list value. */
257 htab_t type_unit_groups
;
259 /* A table mapping .debug_types signatures to its signatured_type entry.
260 This is NULL if the .debug_types section hasn't been read in yet. */
261 htab_t signatured_types
;
263 /* Type unit statistics, to see how well the scaling improvements
265 struct tu_stats tu_stats
;
267 /* A chain of compilation units that are currently read in, so that
268 they can be freed later. */
269 struct dwarf2_per_cu_data
*read_in_chain
;
271 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
272 This is NULL if the table hasn't been allocated yet. */
275 /* Non-zero if we've check for whether there is a DWP file. */
278 /* The DWP file if there is one, or NULL. */
279 struct dwp_file
*dwp_file
;
281 /* The shared '.dwz' file, if one exists. This is used when the
282 original data was compressed using 'dwz -m'. */
283 struct dwz_file
*dwz_file
;
285 /* A flag indicating wether this objfile has a section loaded at a
287 int has_section_at_zero
;
289 /* True if we are using the mapped index,
290 or we are faking it for OBJF_READNOW's sake. */
291 unsigned char using_index
;
293 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
294 struct mapped_index
*index_table
;
296 /* When using index_table, this keeps track of all quick_file_names entries.
297 TUs typically share line table entries with a CU, so we maintain a
298 separate table of all line table entries to support the sharing.
299 Note that while there can be way more TUs than CUs, we've already
300 sorted all the TUs into "type unit groups", grouped by their
301 DW_AT_stmt_list value. Therefore the only sharing done here is with a
302 CU and its associated TU group if there is one. */
303 htab_t quick_file_names_table
;
305 /* Set during partial symbol reading, to prevent queueing of full
307 int reading_partial_symbols
;
309 /* Table mapping type DIEs to their struct type *.
310 This is NULL if not allocated yet.
311 The mapping is done via (CU/TU + DIE offset) -> type. */
312 htab_t die_type_hash
;
314 /* The CUs we recently read. */
315 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
317 /* Table containing line_header indexed by offset and offset_in_dwz. */
318 htab_t line_header_hash
;
321 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
323 /* Default names of the debugging sections. */
325 /* Note that if the debugging section has been compressed, it might
326 have a name like .zdebug_info. */
328 static const struct dwarf2_debug_sections dwarf2_elf_names
=
330 { ".debug_info", ".zdebug_info" },
331 { ".debug_abbrev", ".zdebug_abbrev" },
332 { ".debug_line", ".zdebug_line" },
333 { ".debug_loc", ".zdebug_loc" },
334 { ".debug_macinfo", ".zdebug_macinfo" },
335 { ".debug_macro", ".zdebug_macro" },
336 { ".debug_str", ".zdebug_str" },
337 { ".debug_ranges", ".zdebug_ranges" },
338 { ".debug_types", ".zdebug_types" },
339 { ".debug_addr", ".zdebug_addr" },
340 { ".debug_frame", ".zdebug_frame" },
341 { ".eh_frame", NULL
},
342 { ".gdb_index", ".zgdb_index" },
346 /* List of DWO/DWP sections. */
348 static const struct dwop_section_names
350 struct dwarf2_section_names abbrev_dwo
;
351 struct dwarf2_section_names info_dwo
;
352 struct dwarf2_section_names line_dwo
;
353 struct dwarf2_section_names loc_dwo
;
354 struct dwarf2_section_names macinfo_dwo
;
355 struct dwarf2_section_names macro_dwo
;
356 struct dwarf2_section_names str_dwo
;
357 struct dwarf2_section_names str_offsets_dwo
;
358 struct dwarf2_section_names types_dwo
;
359 struct dwarf2_section_names cu_index
;
360 struct dwarf2_section_names tu_index
;
364 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
365 { ".debug_info.dwo", ".zdebug_info.dwo" },
366 { ".debug_line.dwo", ".zdebug_line.dwo" },
367 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
368 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
369 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
370 { ".debug_str.dwo", ".zdebug_str.dwo" },
371 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
372 { ".debug_types.dwo", ".zdebug_types.dwo" },
373 { ".debug_cu_index", ".zdebug_cu_index" },
374 { ".debug_tu_index", ".zdebug_tu_index" },
377 /* local data types */
379 /* The data in a compilation unit header, after target2host
380 translation, looks like this. */
381 struct comp_unit_head
385 unsigned char addr_size
;
386 unsigned char signed_addr_p
;
387 sect_offset abbrev_offset
;
389 /* Size of file offsets; either 4 or 8. */
390 unsigned int offset_size
;
392 /* Size of the length field; either 4 or 12. */
393 unsigned int initial_length_size
;
395 /* Offset to the first byte of this compilation unit header in the
396 .debug_info section, for resolving relative reference dies. */
399 /* Offset to first die in this cu from the start of the cu.
400 This will be the first byte following the compilation unit header. */
401 cu_offset first_die_offset
;
404 /* Type used for delaying computation of method physnames.
405 See comments for compute_delayed_physnames. */
406 struct delayed_method_info
408 /* The type to which the method is attached, i.e., its parent class. */
411 /* The index of the method in the type's function fieldlists. */
414 /* The index of the method in the fieldlist. */
417 /* The name of the DIE. */
420 /* The DIE associated with this method. */
421 struct die_info
*die
;
424 typedef struct delayed_method_info delayed_method_info
;
425 DEF_VEC_O (delayed_method_info
);
427 /* Internal state when decoding a particular compilation unit. */
430 /* The objfile containing this compilation unit. */
431 struct objfile
*objfile
;
433 /* The header of the compilation unit. */
434 struct comp_unit_head header
;
436 /* Base address of this compilation unit. */
437 CORE_ADDR base_address
;
439 /* Non-zero if base_address has been set. */
442 /* The language we are debugging. */
443 enum language language
;
444 const struct language_defn
*language_defn
;
446 const char *producer
;
448 /* The generic symbol table building routines have separate lists for
449 file scope symbols and all all other scopes (local scopes). So
450 we need to select the right one to pass to add_symbol_to_list().
451 We do it by keeping a pointer to the correct list in list_in_scope.
453 FIXME: The original dwarf code just treated the file scope as the
454 first local scope, and all other local scopes as nested local
455 scopes, and worked fine. Check to see if we really need to
456 distinguish these in buildsym.c. */
457 struct pending
**list_in_scope
;
459 /* The abbrev table for this CU.
460 Normally this points to the abbrev table in the objfile.
461 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
462 struct abbrev_table
*abbrev_table
;
464 /* Hash table holding all the loaded partial DIEs
465 with partial_die->offset.SECT_OFF as hash. */
468 /* Storage for things with the same lifetime as this read-in compilation
469 unit, including partial DIEs. */
470 struct obstack comp_unit_obstack
;
472 /* When multiple dwarf2_cu structures are living in memory, this field
473 chains them all together, so that they can be released efficiently.
474 We will probably also want a generation counter so that most-recently-used
475 compilation units are cached... */
476 struct dwarf2_per_cu_data
*read_in_chain
;
478 /* Backlink to our per_cu entry. */
479 struct dwarf2_per_cu_data
*per_cu
;
481 /* How many compilation units ago was this CU last referenced? */
484 /* A hash table of DIE cu_offset for following references with
485 die_info->offset.sect_off as hash. */
488 /* Full DIEs if read in. */
489 struct die_info
*dies
;
491 /* A set of pointers to dwarf2_per_cu_data objects for compilation
492 units referenced by this one. Only set during full symbol processing;
493 partial symbol tables do not have dependencies. */
496 /* Header data from the line table, during full symbol processing. */
497 struct line_header
*line_header
;
499 /* A list of methods which need to have physnames computed
500 after all type information has been read. */
501 VEC (delayed_method_info
) *method_list
;
503 /* To be copied to symtab->call_site_htab. */
504 htab_t call_site_htab
;
506 /* Non-NULL if this CU came from a DWO file.
507 There is an invariant here that is important to remember:
508 Except for attributes copied from the top level DIE in the "main"
509 (or "stub") file in preparation for reading the DWO file
510 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
511 Either there isn't a DWO file (in which case this is NULL and the point
512 is moot), or there is and either we're not going to read it (in which
513 case this is NULL) or there is and we are reading it (in which case this
515 struct dwo_unit
*dwo_unit
;
517 /* The DW_AT_addr_base attribute if present, zero otherwise
518 (zero is a valid value though).
519 Note this value comes from the Fission stub CU/TU's DIE. */
522 /* The DW_AT_ranges_base attribute if present, zero otherwise
523 (zero is a valid value though).
524 Note this value comes from the Fission stub CU/TU's DIE.
525 Also note that the value is zero in the non-DWO case so this value can
526 be used without needing to know whether DWO files are in use or not.
527 N.B. This does not apply to DW_AT_ranges appearing in
528 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
529 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
530 DW_AT_ranges_base *would* have to be applied, and we'd have to care
531 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
532 ULONGEST ranges_base
;
534 /* Mark used when releasing cached dies. */
535 unsigned int mark
: 1;
537 /* This CU references .debug_loc. See the symtab->locations_valid field.
538 This test is imperfect as there may exist optimized debug code not using
539 any location list and still facing inlining issues if handled as
540 unoptimized code. For a future better test see GCC PR other/32998. */
541 unsigned int has_loclist
: 1;
543 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
544 if all the producer_is_* fields are valid. This information is cached
545 because profiling CU expansion showed excessive time spent in
546 producer_is_gxx_lt_4_6. */
547 unsigned int checked_producer
: 1;
548 unsigned int producer_is_gxx_lt_4_6
: 1;
549 unsigned int producer_is_gcc_lt_4_3
: 1;
550 unsigned int producer_is_icc
: 1;
552 /* When set, the file that we're processing is known to have
553 debugging info for C++ namespaces. GCC 3.3.x did not produce
554 this information, but later versions do. */
556 unsigned int processing_has_namespace_info
: 1;
559 /* Persistent data held for a compilation unit, even when not
560 processing it. We put a pointer to this structure in the
561 read_symtab_private field of the psymtab. */
563 struct dwarf2_per_cu_data
565 /* The start offset and length of this compilation unit.
566 NOTE: Unlike comp_unit_head.length, this length includes
568 If the DIE refers to a DWO file, this is always of the original die,
573 /* Flag indicating this compilation unit will be read in before
574 any of the current compilation units are processed. */
575 unsigned int queued
: 1;
577 /* This flag will be set when reading partial DIEs if we need to load
578 absolutely all DIEs for this compilation unit, instead of just the ones
579 we think are interesting. It gets set if we look for a DIE in the
580 hash table and don't find it. */
581 unsigned int load_all_dies
: 1;
583 /* Non-zero if this CU is from .debug_types.
584 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
586 unsigned int is_debug_types
: 1;
588 /* Non-zero if this CU is from the .dwz file. */
589 unsigned int is_dwz
: 1;
591 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
592 This flag is only valid if is_debug_types is true.
593 We can't read a CU directly from a DWO file: There are required
594 attributes in the stub. */
595 unsigned int reading_dwo_directly
: 1;
597 /* Non-zero if the TU has been read.
598 This is used to assist the "Stay in DWO Optimization" for Fission:
599 When reading a DWO, it's faster to read TUs from the DWO instead of
600 fetching them from random other DWOs (due to comdat folding).
601 If the TU has already been read, the optimization is unnecessary
602 (and unwise - we don't want to change where gdb thinks the TU lives
604 This flag is only valid if is_debug_types is true. */
605 unsigned int tu_read
: 1;
607 /* The section this CU/TU lives in.
608 If the DIE refers to a DWO file, this is always the original die,
610 struct dwarf2_section_info
*section
;
612 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
613 of the CU cache it gets reset to NULL again. */
614 struct dwarf2_cu
*cu
;
616 /* The corresponding objfile.
617 Normally we can get the objfile from dwarf2_per_objfile.
618 However we can enter this file with just a "per_cu" handle. */
619 struct objfile
*objfile
;
621 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
622 is active. Otherwise, the 'psymtab' field is active. */
625 /* The partial symbol table associated with this compilation unit,
626 or NULL for unread partial units. */
627 struct partial_symtab
*psymtab
;
629 /* Data needed by the "quick" functions. */
630 struct dwarf2_per_cu_quick_data
*quick
;
633 /* The CUs we import using DW_TAG_imported_unit. This is filled in
634 while reading psymtabs, used to compute the psymtab dependencies,
635 and then cleared. Then it is filled in again while reading full
636 symbols, and only deleted when the objfile is destroyed.
638 This is also used to work around a difference between the way gold
639 generates .gdb_index version <=7 and the way gdb does. Arguably this
640 is a gold bug. For symbols coming from TUs, gold records in the index
641 the CU that includes the TU instead of the TU itself. This breaks
642 dw2_lookup_symbol: It assumes that if the index says symbol X lives
643 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
644 will find X. Alas TUs live in their own symtab, so after expanding CU Y
645 we need to look in TU Z to find X. Fortunately, this is akin to
646 DW_TAG_imported_unit, so we just use the same mechanism: For
647 .gdb_index version <=7 this also records the TUs that the CU referred
648 to. Concurrently with this change gdb was modified to emit version 8
649 indices so we only pay a price for gold generated indices.
650 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
651 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
654 /* Entry in the signatured_types hash table. */
656 struct signatured_type
658 /* The "per_cu" object of this type.
659 This struct is used iff per_cu.is_debug_types.
660 N.B.: This is the first member so that it's easy to convert pointers
662 struct dwarf2_per_cu_data per_cu
;
664 /* The type's signature. */
667 /* Offset in the TU of the type's DIE, as read from the TU header.
668 If this TU is a DWO stub and the definition lives in a DWO file
669 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
670 cu_offset type_offset_in_tu
;
672 /* Offset in the section of the type's DIE.
673 If the definition lives in a DWO file, this is the offset in the
674 .debug_types.dwo section.
675 The value is zero until the actual value is known.
676 Zero is otherwise not a valid section offset. */
677 sect_offset type_offset_in_section
;
679 /* Type units are grouped by their DW_AT_stmt_list entry so that they
680 can share them. This points to the containing symtab. */
681 struct type_unit_group
*type_unit_group
;
684 The first time we encounter this type we fully read it in and install it
685 in the symbol tables. Subsequent times we only need the type. */
688 /* Containing DWO unit.
689 This field is valid iff per_cu.reading_dwo_directly. */
690 struct dwo_unit
*dwo_unit
;
693 typedef struct signatured_type
*sig_type_ptr
;
694 DEF_VEC_P (sig_type_ptr
);
696 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
697 This includes type_unit_group and quick_file_names. */
699 struct stmt_list_hash
701 /* The DWO unit this table is from or NULL if there is none. */
702 struct dwo_unit
*dwo_unit
;
704 /* Offset in .debug_line or .debug_line.dwo. */
705 sect_offset line_offset
;
708 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
709 an object of this type. */
711 struct type_unit_group
713 /* dwarf2read.c's main "handle" on a TU symtab.
714 To simplify things we create an artificial CU that "includes" all the
715 type units using this stmt_list so that the rest of the code still has
716 a "per_cu" handle on the symtab.
717 This PER_CU is recognized by having no section. */
718 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
719 struct dwarf2_per_cu_data per_cu
;
721 /* The TUs that share this DW_AT_stmt_list entry.
722 This is added to while parsing type units to build partial symtabs,
723 and is deleted afterwards and not used again. */
724 VEC (sig_type_ptr
) *tus
;
726 /* The compunit symtab.
727 Type units in a group needn't all be defined in the same source file,
728 so we create an essentially anonymous symtab as the compunit symtab. */
729 struct compunit_symtab
*compunit_symtab
;
731 /* The data used to construct the hash key. */
732 struct stmt_list_hash hash
;
734 /* The number of symtabs from the line header.
735 The value here must match line_header.num_file_names. */
736 unsigned int num_symtabs
;
738 /* The symbol tables for this TU (obtained from the files listed in
740 WARNING: The order of entries here must match the order of entries
741 in the line header. After the first TU using this type_unit_group, the
742 line header for the subsequent TUs is recreated from this. This is done
743 because we need to use the same symtabs for each TU using the same
744 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
745 there's no guarantee the line header doesn't have duplicate entries. */
746 struct symtab
**symtabs
;
749 /* These sections are what may appear in a (real or virtual) DWO file. */
753 struct dwarf2_section_info abbrev
;
754 struct dwarf2_section_info line
;
755 struct dwarf2_section_info loc
;
756 struct dwarf2_section_info macinfo
;
757 struct dwarf2_section_info macro
;
758 struct dwarf2_section_info str
;
759 struct dwarf2_section_info str_offsets
;
760 /* In the case of a virtual DWO file, these two are unused. */
761 struct dwarf2_section_info info
;
762 VEC (dwarf2_section_info_def
) *types
;
765 /* CUs/TUs in DWP/DWO files. */
769 /* Backlink to the containing struct dwo_file. */
770 struct dwo_file
*dwo_file
;
772 /* The "id" that distinguishes this CU/TU.
773 .debug_info calls this "dwo_id", .debug_types calls this "signature".
774 Since signatures came first, we stick with it for consistency. */
777 /* The section this CU/TU lives in, in the DWO file. */
778 struct dwarf2_section_info
*section
;
780 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
784 /* For types, offset in the type's DIE of the type defined by this TU. */
785 cu_offset type_offset_in_tu
;
788 /* include/dwarf2.h defines the DWP section codes.
789 It defines a max value but it doesn't define a min value, which we
790 use for error checking, so provide one. */
792 enum dwp_v2_section_ids
797 /* Data for one DWO file.
799 This includes virtual DWO files (a virtual DWO file is a DWO file as it
800 appears in a DWP file). DWP files don't really have DWO files per se -
801 comdat folding of types "loses" the DWO file they came from, and from
802 a high level view DWP files appear to contain a mass of random types.
803 However, to maintain consistency with the non-DWP case we pretend DWP
804 files contain virtual DWO files, and we assign each TU with one virtual
805 DWO file (generally based on the line and abbrev section offsets -
806 a heuristic that seems to work in practice). */
810 /* The DW_AT_GNU_dwo_name attribute.
811 For virtual DWO files the name is constructed from the section offsets
812 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
813 from related CU+TUs. */
814 const char *dwo_name
;
816 /* The DW_AT_comp_dir attribute. */
817 const char *comp_dir
;
819 /* The bfd, when the file is open. Otherwise this is NULL.
820 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
823 /* The sections that make up this DWO file.
824 Remember that for virtual DWO files in DWP V2, these are virtual
825 sections (for lack of a better name). */
826 struct dwo_sections sections
;
828 /* The CU in the file.
829 We only support one because having more than one requires hacking the
830 dwo_name of each to match, which is highly unlikely to happen.
831 Doing this means all TUs can share comp_dir: We also assume that
832 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
835 /* Table of TUs in the file.
836 Each element is a struct dwo_unit. */
840 /* These sections are what may appear in a DWP file. */
844 /* These are used by both DWP version 1 and 2. */
845 struct dwarf2_section_info str
;
846 struct dwarf2_section_info cu_index
;
847 struct dwarf2_section_info tu_index
;
849 /* These are only used by DWP version 2 files.
850 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
851 sections are referenced by section number, and are not recorded here.
852 In DWP version 2 there is at most one copy of all these sections, each
853 section being (effectively) comprised of the concatenation of all of the
854 individual sections that exist in the version 1 format.
855 To keep the code simple we treat each of these concatenated pieces as a
856 section itself (a virtual section?). */
857 struct dwarf2_section_info abbrev
;
858 struct dwarf2_section_info info
;
859 struct dwarf2_section_info line
;
860 struct dwarf2_section_info loc
;
861 struct dwarf2_section_info macinfo
;
862 struct dwarf2_section_info macro
;
863 struct dwarf2_section_info str_offsets
;
864 struct dwarf2_section_info types
;
867 /* These sections are what may appear in a virtual DWO file in DWP version 1.
868 A virtual DWO file is a DWO file as it appears in a DWP file. */
870 struct virtual_v1_dwo_sections
872 struct dwarf2_section_info abbrev
;
873 struct dwarf2_section_info line
;
874 struct dwarf2_section_info loc
;
875 struct dwarf2_section_info macinfo
;
876 struct dwarf2_section_info macro
;
877 struct dwarf2_section_info str_offsets
;
878 /* Each DWP hash table entry records one CU or one TU.
879 That is recorded here, and copied to dwo_unit.section. */
880 struct dwarf2_section_info info_or_types
;
883 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
884 In version 2, the sections of the DWO files are concatenated together
885 and stored in one section of that name. Thus each ELF section contains
886 several "virtual" sections. */
888 struct virtual_v2_dwo_sections
890 bfd_size_type abbrev_offset
;
891 bfd_size_type abbrev_size
;
893 bfd_size_type line_offset
;
894 bfd_size_type line_size
;
896 bfd_size_type loc_offset
;
897 bfd_size_type loc_size
;
899 bfd_size_type macinfo_offset
;
900 bfd_size_type macinfo_size
;
902 bfd_size_type macro_offset
;
903 bfd_size_type macro_size
;
905 bfd_size_type str_offsets_offset
;
906 bfd_size_type str_offsets_size
;
908 /* Each DWP hash table entry records one CU or one TU.
909 That is recorded here, and copied to dwo_unit.section. */
910 bfd_size_type info_or_types_offset
;
911 bfd_size_type info_or_types_size
;
914 /* Contents of DWP hash tables. */
916 struct dwp_hash_table
918 uint32_t version
, nr_columns
;
919 uint32_t nr_units
, nr_slots
;
920 const gdb_byte
*hash_table
, *unit_table
;
925 const gdb_byte
*indices
;
929 /* This is indexed by column number and gives the id of the section
931 #define MAX_NR_V2_DWO_SECTIONS \
932 (1 /* .debug_info or .debug_types */ \
933 + 1 /* .debug_abbrev */ \
934 + 1 /* .debug_line */ \
935 + 1 /* .debug_loc */ \
936 + 1 /* .debug_str_offsets */ \
937 + 1 /* .debug_macro or .debug_macinfo */)
938 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
939 const gdb_byte
*offsets
;
940 const gdb_byte
*sizes
;
945 /* Data for one DWP file. */
949 /* Name of the file. */
952 /* File format version. */
958 /* Section info for this file. */
959 struct dwp_sections sections
;
961 /* Table of CUs in the file. */
962 const struct dwp_hash_table
*cus
;
964 /* Table of TUs in the file. */
965 const struct dwp_hash_table
*tus
;
967 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
971 /* Table to map ELF section numbers to their sections.
972 This is only needed for the DWP V1 file format. */
973 unsigned int num_sections
;
974 asection
**elf_sections
;
977 /* This represents a '.dwz' file. */
981 /* A dwz file can only contain a few sections. */
982 struct dwarf2_section_info abbrev
;
983 struct dwarf2_section_info info
;
984 struct dwarf2_section_info str
;
985 struct dwarf2_section_info line
;
986 struct dwarf2_section_info macro
;
987 struct dwarf2_section_info gdb_index
;
993 /* Struct used to pass misc. parameters to read_die_and_children, et
994 al. which are used for both .debug_info and .debug_types dies.
995 All parameters here are unchanging for the life of the call. This
996 struct exists to abstract away the constant parameters of die reading. */
998 struct die_reader_specs
1000 /* The bfd of die_section. */
1003 /* The CU of the DIE we are parsing. */
1004 struct dwarf2_cu
*cu
;
1006 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1007 struct dwo_file
*dwo_file
;
1009 /* The section the die comes from.
1010 This is either .debug_info or .debug_types, or the .dwo variants. */
1011 struct dwarf2_section_info
*die_section
;
1013 /* die_section->buffer. */
1014 const gdb_byte
*buffer
;
1016 /* The end of the buffer. */
1017 const gdb_byte
*buffer_end
;
1019 /* The value of the DW_AT_comp_dir attribute. */
1020 const char *comp_dir
;
1023 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1024 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1025 const gdb_byte
*info_ptr
,
1026 struct die_info
*comp_unit_die
,
1033 unsigned int dir_index
;
1034 unsigned int mod_time
;
1035 unsigned int length
;
1036 /* Non-zero if referenced by the Line Number Program. */
1038 /* The associated symbol table, if any. */
1039 struct symtab
*symtab
;
1042 /* The line number information for a compilation unit (found in the
1043 .debug_line section) begins with a "statement program header",
1044 which contains the following information. */
1047 /* Offset of line number information in .debug_line section. */
1050 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1051 unsigned offset_in_dwz
: 1;
1053 unsigned int total_length
;
1054 unsigned short version
;
1055 unsigned int header_length
;
1056 unsigned char minimum_instruction_length
;
1057 unsigned char maximum_ops_per_instruction
;
1058 unsigned char default_is_stmt
;
1060 unsigned char line_range
;
1061 unsigned char opcode_base
;
1063 /* standard_opcode_lengths[i] is the number of operands for the
1064 standard opcode whose value is i. This means that
1065 standard_opcode_lengths[0] is unused, and the last meaningful
1066 element is standard_opcode_lengths[opcode_base - 1]. */
1067 unsigned char *standard_opcode_lengths
;
1069 /* The include_directories table. NOTE! These strings are not
1070 allocated with xmalloc; instead, they are pointers into
1071 debug_line_buffer. If you try to free them, `free' will get
1073 unsigned int num_include_dirs
, include_dirs_size
;
1074 const char **include_dirs
;
1076 /* The file_names table. NOTE! These strings are not allocated
1077 with xmalloc; instead, they are pointers into debug_line_buffer.
1078 Don't try to free them directly. */
1079 unsigned int num_file_names
, file_names_size
;
1080 struct file_entry
*file_names
;
1082 /* The start and end of the statement program following this
1083 header. These point into dwarf2_per_objfile->line_buffer. */
1084 const gdb_byte
*statement_program_start
, *statement_program_end
;
1087 /* When we construct a partial symbol table entry we only
1088 need this much information. */
1089 struct partial_die_info
1091 /* Offset of this DIE. */
1094 /* DWARF-2 tag for this DIE. */
1095 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1097 /* Assorted flags describing the data found in this DIE. */
1098 unsigned int has_children
: 1;
1099 unsigned int is_external
: 1;
1100 unsigned int is_declaration
: 1;
1101 unsigned int has_type
: 1;
1102 unsigned int has_specification
: 1;
1103 unsigned int has_pc_info
: 1;
1104 unsigned int may_be_inlined
: 1;
1106 /* Flag set if the SCOPE field of this structure has been
1108 unsigned int scope_set
: 1;
1110 /* Flag set if the DIE has a byte_size attribute. */
1111 unsigned int has_byte_size
: 1;
1113 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1114 unsigned int has_const_value
: 1;
1116 /* Flag set if any of the DIE's children are template arguments. */
1117 unsigned int has_template_arguments
: 1;
1119 /* Flag set if fixup_partial_die has been called on this die. */
1120 unsigned int fixup_called
: 1;
1122 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1123 unsigned int is_dwz
: 1;
1125 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1126 unsigned int spec_is_dwz
: 1;
1128 /* The name of this DIE. Normally the value of DW_AT_name, but
1129 sometimes a default name for unnamed DIEs. */
1132 /* The linkage name, if present. */
1133 const char *linkage_name
;
1135 /* The scope to prepend to our children. This is generally
1136 allocated on the comp_unit_obstack, so will disappear
1137 when this compilation unit leaves the cache. */
1140 /* Some data associated with the partial DIE. The tag determines
1141 which field is live. */
1144 /* The location description associated with this DIE, if any. */
1145 struct dwarf_block
*locdesc
;
1146 /* The offset of an import, for DW_TAG_imported_unit. */
1150 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1154 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1155 DW_AT_sibling, if any. */
1156 /* NOTE: This member isn't strictly necessary, read_partial_die could
1157 return DW_AT_sibling values to its caller load_partial_dies. */
1158 const gdb_byte
*sibling
;
1160 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1161 DW_AT_specification (or DW_AT_abstract_origin or
1162 DW_AT_extension). */
1163 sect_offset spec_offset
;
1165 /* Pointers to this DIE's parent, first child, and next sibling,
1167 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1170 /* This data structure holds the information of an abbrev. */
1173 unsigned int number
; /* number identifying abbrev */
1174 enum dwarf_tag tag
; /* dwarf tag */
1175 unsigned short has_children
; /* boolean */
1176 unsigned short num_attrs
; /* number of attributes */
1177 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1178 struct abbrev_info
*next
; /* next in chain */
1183 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1184 ENUM_BITFIELD(dwarf_form
) form
: 16;
1187 /* Size of abbrev_table.abbrev_hash_table. */
1188 #define ABBREV_HASH_SIZE 121
1190 /* Top level data structure to contain an abbreviation table. */
1194 /* Where the abbrev table came from.
1195 This is used as a sanity check when the table is used. */
1198 /* Storage for the abbrev table. */
1199 struct obstack abbrev_obstack
;
1201 /* Hash table of abbrevs.
1202 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1203 It could be statically allocated, but the previous code didn't so we
1205 struct abbrev_info
**abbrevs
;
1208 /* Attributes have a name and a value. */
1211 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1212 ENUM_BITFIELD(dwarf_form
) form
: 15;
1214 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1215 field should be in u.str (existing only for DW_STRING) but it is kept
1216 here for better struct attribute alignment. */
1217 unsigned int string_is_canonical
: 1;
1222 struct dwarf_block
*blk
;
1231 /* This data structure holds a complete die structure. */
1234 /* DWARF-2 tag for this DIE. */
1235 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1237 /* Number of attributes */
1238 unsigned char num_attrs
;
1240 /* True if we're presently building the full type name for the
1241 type derived from this DIE. */
1242 unsigned char building_fullname
: 1;
1244 /* True if this die is in process. PR 16581. */
1245 unsigned char in_process
: 1;
1248 unsigned int abbrev
;
1250 /* Offset in .debug_info or .debug_types section. */
1253 /* The dies in a compilation unit form an n-ary tree. PARENT
1254 points to this die's parent; CHILD points to the first child of
1255 this node; and all the children of a given node are chained
1256 together via their SIBLING fields. */
1257 struct die_info
*child
; /* Its first child, if any. */
1258 struct die_info
*sibling
; /* Its next sibling, if any. */
1259 struct die_info
*parent
; /* Its parent, if any. */
1261 /* An array of attributes, with NUM_ATTRS elements. There may be
1262 zero, but it's not common and zero-sized arrays are not
1263 sufficiently portable C. */
1264 struct attribute attrs
[1];
1267 /* Get at parts of an attribute structure. */
1269 #define DW_STRING(attr) ((attr)->u.str)
1270 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1271 #define DW_UNSND(attr) ((attr)->u.unsnd)
1272 #define DW_BLOCK(attr) ((attr)->u.blk)
1273 #define DW_SND(attr) ((attr)->u.snd)
1274 #define DW_ADDR(attr) ((attr)->u.addr)
1275 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1277 /* Blocks are a bunch of untyped bytes. */
1282 /* Valid only if SIZE is not zero. */
1283 const gdb_byte
*data
;
1286 #ifndef ATTR_ALLOC_CHUNK
1287 #define ATTR_ALLOC_CHUNK 4
1290 /* Allocate fields for structs, unions and enums in this size. */
1291 #ifndef DW_FIELD_ALLOC_CHUNK
1292 #define DW_FIELD_ALLOC_CHUNK 4
1295 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1296 but this would require a corresponding change in unpack_field_as_long
1298 static int bits_per_byte
= 8;
1302 struct nextfield
*next
;
1310 struct nextfnfield
*next
;
1311 struct fn_field fnfield
;
1318 struct nextfnfield
*head
;
1321 struct typedef_field_list
1323 struct typedef_field field
;
1324 struct typedef_field_list
*next
;
1327 /* The routines that read and process dies for a C struct or C++ class
1328 pass lists of data member fields and lists of member function fields
1329 in an instance of a field_info structure, as defined below. */
1332 /* List of data member and baseclasses fields. */
1333 struct nextfield
*fields
, *baseclasses
;
1335 /* Number of fields (including baseclasses). */
1338 /* Number of baseclasses. */
1341 /* Set if the accesibility of one of the fields is not public. */
1342 int non_public_fields
;
1344 /* Member function fields array, entries are allocated in the order they
1345 are encountered in the object file. */
1346 struct nextfnfield
*fnfields
;
1348 /* Member function fieldlist array, contains name of possibly overloaded
1349 member function, number of overloaded member functions and a pointer
1350 to the head of the member function field chain. */
1351 struct fnfieldlist
*fnfieldlists
;
1353 /* Number of entries in the fnfieldlists array. */
1356 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1357 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1358 struct typedef_field_list
*typedef_field_list
;
1359 unsigned typedef_field_list_count
;
1362 /* One item on the queue of compilation units to read in full symbols
1364 struct dwarf2_queue_item
1366 struct dwarf2_per_cu_data
*per_cu
;
1367 enum language pretend_language
;
1368 struct dwarf2_queue_item
*next
;
1371 /* The current queue. */
1372 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1374 /* Loaded secondary compilation units are kept in memory until they
1375 have not been referenced for the processing of this many
1376 compilation units. Set this to zero to disable caching. Cache
1377 sizes of up to at least twenty will improve startup time for
1378 typical inter-CU-reference binaries, at an obvious memory cost. */
1379 static int dwarf_max_cache_age
= 5;
1381 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1382 struct cmd_list_element
*c
, const char *value
)
1384 fprintf_filtered (file
, _("The upper bound on the age of cached "
1385 "DWARF compilation units is %s.\n"),
1389 /* local function prototypes */
1391 static const char *get_section_name (const struct dwarf2_section_info
*);
1393 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1395 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1397 static void dwarf2_find_base_address (struct die_info
*die
,
1398 struct dwarf2_cu
*cu
);
1400 static struct partial_symtab
*create_partial_symtab
1401 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1403 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1405 static void scan_partial_symbols (struct partial_die_info
*,
1406 CORE_ADDR
*, CORE_ADDR
*,
1407 int, struct dwarf2_cu
*);
1409 static void add_partial_symbol (struct partial_die_info
*,
1410 struct dwarf2_cu
*);
1412 static void add_partial_namespace (struct partial_die_info
*pdi
,
1413 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1414 int set_addrmap
, struct dwarf2_cu
*cu
);
1416 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1417 CORE_ADDR
*highpc
, int set_addrmap
,
1418 struct dwarf2_cu
*cu
);
1420 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1421 struct dwarf2_cu
*cu
);
1423 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1424 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1425 int need_pc
, struct dwarf2_cu
*cu
);
1427 static void dwarf2_read_symtab (struct partial_symtab
*,
1430 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1432 static struct abbrev_info
*abbrev_table_lookup_abbrev
1433 (const struct abbrev_table
*, unsigned int);
1435 static struct abbrev_table
*abbrev_table_read_table
1436 (struct dwarf2_section_info
*, sect_offset
);
1438 static void abbrev_table_free (struct abbrev_table
*);
1440 static void abbrev_table_free_cleanup (void *);
1442 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1443 struct dwarf2_section_info
*);
1445 static void dwarf2_free_abbrev_table (void *);
1447 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1449 static struct partial_die_info
*load_partial_dies
1450 (const struct die_reader_specs
*, const gdb_byte
*, int);
1452 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1453 struct partial_die_info
*,
1454 struct abbrev_info
*,
1458 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1459 struct dwarf2_cu
*);
1461 static void fixup_partial_die (struct partial_die_info
*,
1462 struct dwarf2_cu
*);
1464 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1465 struct attribute
*, struct attr_abbrev
*,
1468 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1470 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1472 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1474 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1476 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1478 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1481 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1483 static LONGEST read_checked_initial_length_and_offset
1484 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1485 unsigned int *, unsigned int *);
1487 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1488 const struct comp_unit_head
*,
1491 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1493 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1496 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1498 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1500 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1501 const struct comp_unit_head
*,
1504 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1506 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1508 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1510 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1514 static const char *read_str_index (const struct die_reader_specs
*reader
,
1515 ULONGEST str_index
);
1517 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1519 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1520 struct dwarf2_cu
*);
1522 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1525 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1526 struct dwarf2_cu
*cu
);
1528 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1530 static struct die_info
*die_specification (struct die_info
*die
,
1531 struct dwarf2_cu
**);
1533 static void free_line_header (struct line_header
*lh
);
1535 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1536 struct dwarf2_cu
*cu
);
1538 static void dwarf_decode_lines (struct line_header
*, const char *,
1539 struct dwarf2_cu
*, struct partial_symtab
*,
1540 CORE_ADDR
, int decode_mapping
);
1542 static void dwarf2_start_subfile (const char *, const char *);
1544 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1545 const char *, const char *,
1548 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1549 struct dwarf2_cu
*);
1551 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1552 struct dwarf2_cu
*, struct symbol
*);
1554 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1555 struct dwarf2_cu
*);
1557 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1560 struct obstack
*obstack
,
1561 struct dwarf2_cu
*cu
, LONGEST
*value
,
1562 const gdb_byte
**bytes
,
1563 struct dwarf2_locexpr_baton
**baton
);
1565 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1567 static int need_gnat_info (struct dwarf2_cu
*);
1569 static struct type
*die_descriptive_type (struct die_info
*,
1570 struct dwarf2_cu
*);
1572 static void set_descriptive_type (struct type
*, struct die_info
*,
1573 struct dwarf2_cu
*);
1575 static struct type
*die_containing_type (struct die_info
*,
1576 struct dwarf2_cu
*);
1578 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1579 struct dwarf2_cu
*);
1581 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1583 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1585 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1587 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1588 const char *suffix
, int physname
,
1589 struct dwarf2_cu
*cu
);
1591 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1593 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1595 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1597 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1599 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1601 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1602 struct dwarf2_cu
*, struct partial_symtab
*);
1604 static int dwarf2_get_pc_bounds (struct die_info
*,
1605 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1606 struct partial_symtab
*);
1608 static void get_scope_pc_bounds (struct die_info
*,
1609 CORE_ADDR
*, CORE_ADDR
*,
1610 struct dwarf2_cu
*);
1612 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1613 CORE_ADDR
, struct dwarf2_cu
*);
1615 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1616 struct dwarf2_cu
*);
1618 static void dwarf2_attach_fields_to_type (struct field_info
*,
1619 struct type
*, struct dwarf2_cu
*);
1621 static void dwarf2_add_member_fn (struct field_info
*,
1622 struct die_info
*, struct type
*,
1623 struct dwarf2_cu
*);
1625 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1627 struct dwarf2_cu
*);
1629 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1631 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1633 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1635 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1637 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1639 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1641 static struct type
*read_module_type (struct die_info
*die
,
1642 struct dwarf2_cu
*cu
);
1644 static const char *namespace_name (struct die_info
*die
,
1645 int *is_anonymous
, struct dwarf2_cu
*);
1647 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1649 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1651 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1652 struct dwarf2_cu
*);
1654 static struct die_info
*read_die_and_siblings_1
1655 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1658 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1659 const gdb_byte
*info_ptr
,
1660 const gdb_byte
**new_info_ptr
,
1661 struct die_info
*parent
);
1663 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1664 struct die_info
**, const gdb_byte
*,
1667 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1668 struct die_info
**, const gdb_byte
*,
1671 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1673 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1676 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1678 static const char *dwarf2_full_name (const char *name
,
1679 struct die_info
*die
,
1680 struct dwarf2_cu
*cu
);
1682 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1683 struct dwarf2_cu
*cu
);
1685 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1686 struct dwarf2_cu
**);
1688 static const char *dwarf_tag_name (unsigned int);
1690 static const char *dwarf_attr_name (unsigned int);
1692 static const char *dwarf_form_name (unsigned int);
1694 static char *dwarf_bool_name (unsigned int);
1696 static const char *dwarf_type_encoding_name (unsigned int);
1698 static struct die_info
*sibling_die (struct die_info
*);
1700 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1702 static void dump_die_for_error (struct die_info
*);
1704 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1707 /*static*/ void dump_die (struct die_info
*, int max_level
);
1709 static void store_in_ref_table (struct die_info
*,
1710 struct dwarf2_cu
*);
1712 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1714 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1716 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1717 const struct attribute
*,
1718 struct dwarf2_cu
**);
1720 static struct die_info
*follow_die_ref (struct die_info
*,
1721 const struct attribute
*,
1722 struct dwarf2_cu
**);
1724 static struct die_info
*follow_die_sig (struct die_info
*,
1725 const struct attribute
*,
1726 struct dwarf2_cu
**);
1728 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1729 struct dwarf2_cu
*);
1731 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1732 const struct attribute
*,
1733 struct dwarf2_cu
*);
1735 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1737 static void read_signatured_type (struct signatured_type
*);
1739 /* memory allocation interface */
1741 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1743 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1745 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1747 static int attr_form_is_block (const struct attribute
*);
1749 static int attr_form_is_section_offset (const struct attribute
*);
1751 static int attr_form_is_constant (const struct attribute
*);
1753 static int attr_form_is_ref (const struct attribute
*);
1755 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1756 struct dwarf2_loclist_baton
*baton
,
1757 const struct attribute
*attr
);
1759 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1761 struct dwarf2_cu
*cu
,
1764 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1765 const gdb_byte
*info_ptr
,
1766 struct abbrev_info
*abbrev
);
1768 static void free_stack_comp_unit (void *);
1770 static hashval_t
partial_die_hash (const void *item
);
1772 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1774 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1775 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1777 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1778 struct dwarf2_per_cu_data
*per_cu
);
1780 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1781 struct die_info
*comp_unit_die
,
1782 enum language pretend_language
);
1784 static void free_heap_comp_unit (void *);
1786 static void free_cached_comp_units (void *);
1788 static void age_cached_comp_units (void);
1790 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1792 static struct type
*set_die_type (struct die_info
*, struct type
*,
1793 struct dwarf2_cu
*);
1795 static void create_all_comp_units (struct objfile
*);
1797 static int create_all_type_units (struct objfile
*);
1799 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1802 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1805 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1808 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1809 struct dwarf2_per_cu_data
*);
1811 static void dwarf2_mark (struct dwarf2_cu
*);
1813 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1815 static struct type
*get_die_type_at_offset (sect_offset
,
1816 struct dwarf2_per_cu_data
*);
1818 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1820 static void dwarf2_release_queue (void *dummy
);
1822 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1823 enum language pretend_language
);
1825 static void process_queue (void);
1827 static void find_file_and_directory (struct die_info
*die
,
1828 struct dwarf2_cu
*cu
,
1829 const char **name
, const char **comp_dir
);
1831 static char *file_full_name (int file
, struct line_header
*lh
,
1832 const char *comp_dir
);
1834 static const gdb_byte
*read_and_check_comp_unit_head
1835 (struct comp_unit_head
*header
,
1836 struct dwarf2_section_info
*section
,
1837 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1838 int is_debug_types_section
);
1840 static void init_cutu_and_read_dies
1841 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1842 int use_existing_cu
, int keep
,
1843 die_reader_func_ftype
*die_reader_func
, void *data
);
1845 static void init_cutu_and_read_dies_simple
1846 (struct dwarf2_per_cu_data
*this_cu
,
1847 die_reader_func_ftype
*die_reader_func
, void *data
);
1849 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1851 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1853 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1854 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1855 ULONGEST signature
, int is_debug_types
);
1857 static struct dwp_file
*get_dwp_file (void);
1859 static struct dwo_unit
*lookup_dwo_comp_unit
1860 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1862 static struct dwo_unit
*lookup_dwo_type_unit
1863 (struct signatured_type
*, const char *, const char *);
1865 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1867 static void free_dwo_file_cleanup (void *);
1869 static void process_cu_includes (void);
1871 static void check_producer (struct dwarf2_cu
*cu
);
1873 static void free_line_header_voidp (void *arg
);
1875 /* Various complaints about symbol reading that don't abort the process. */
1878 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1880 complaint (&symfile_complaints
,
1881 _("statement list doesn't fit in .debug_line section"));
1885 dwarf2_debug_line_missing_file_complaint (void)
1887 complaint (&symfile_complaints
,
1888 _(".debug_line section has line data without a file"));
1892 dwarf2_debug_line_missing_end_sequence_complaint (void)
1894 complaint (&symfile_complaints
,
1895 _(".debug_line section has line "
1896 "program sequence without an end"));
1900 dwarf2_complex_location_expr_complaint (void)
1902 complaint (&symfile_complaints
, _("location expression too complex"));
1906 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1909 complaint (&symfile_complaints
,
1910 _("const value length mismatch for '%s', got %d, expected %d"),
1915 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1917 complaint (&symfile_complaints
,
1918 _("debug info runs off end of %s section"
1920 get_section_name (section
),
1921 get_section_file_name (section
));
1925 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1927 complaint (&symfile_complaints
,
1928 _("macro debug info contains a "
1929 "malformed macro definition:\n`%s'"),
1934 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1936 complaint (&symfile_complaints
,
1937 _("invalid attribute class or form for '%s' in '%s'"),
1941 /* Hash function for line_header_hash. */
1944 line_header_hash (const struct line_header
*ofs
)
1946 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1949 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1952 line_header_hash_voidp (const void *item
)
1954 const struct line_header
*ofs
= item
;
1956 return line_header_hash (ofs
);
1959 /* Equality function for line_header_hash. */
1962 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1964 const struct line_header
*ofs_lhs
= item_lhs
;
1965 const struct line_header
*ofs_rhs
= item_rhs
;
1967 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1968 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1974 /* Convert VALUE between big- and little-endian. */
1976 byte_swap (offset_type value
)
1980 result
= (value
& 0xff) << 24;
1981 result
|= (value
& 0xff00) << 8;
1982 result
|= (value
& 0xff0000) >> 8;
1983 result
|= (value
& 0xff000000) >> 24;
1987 #define MAYBE_SWAP(V) byte_swap (V)
1990 #define MAYBE_SWAP(V) (V)
1991 #endif /* WORDS_BIGENDIAN */
1993 /* Read the given attribute value as an address, taking the attribute's
1994 form into account. */
1997 attr_value_as_address (struct attribute
*attr
)
2001 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2003 /* Aside from a few clearly defined exceptions, attributes that
2004 contain an address must always be in DW_FORM_addr form.
2005 Unfortunately, some compilers happen to be violating this
2006 requirement by encoding addresses using other forms, such
2007 as DW_FORM_data4 for example. For those broken compilers,
2008 we try to do our best, without any guarantee of success,
2009 to interpret the address correctly. It would also be nice
2010 to generate a complaint, but that would require us to maintain
2011 a list of legitimate cases where a non-address form is allowed,
2012 as well as update callers to pass in at least the CU's DWARF
2013 version. This is more overhead than what we're willing to
2014 expand for a pretty rare case. */
2015 addr
= DW_UNSND (attr
);
2018 addr
= DW_ADDR (attr
);
2023 /* The suffix for an index file. */
2024 #define INDEX_SUFFIX ".gdb-index"
2026 /* Try to locate the sections we need for DWARF 2 debugging
2027 information and return true if we have enough to do something.
2028 NAMES points to the dwarf2 section names, or is NULL if the standard
2029 ELF names are used. */
2032 dwarf2_has_info (struct objfile
*objfile
,
2033 const struct dwarf2_debug_sections
*names
)
2035 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2036 if (!dwarf2_per_objfile
)
2038 /* Initialize per-objfile state. */
2039 struct dwarf2_per_objfile
*data
2040 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
2042 memset (data
, 0, sizeof (*data
));
2043 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2044 dwarf2_per_objfile
= data
;
2046 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2048 dwarf2_per_objfile
->objfile
= objfile
;
2050 return (!dwarf2_per_objfile
->info
.is_virtual
2051 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
2052 && !dwarf2_per_objfile
->abbrev
.is_virtual
2053 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
2056 /* Return the containing section of virtual section SECTION. */
2058 static struct dwarf2_section_info
*
2059 get_containing_section (const struct dwarf2_section_info
*section
)
2061 gdb_assert (section
->is_virtual
);
2062 return section
->s
.containing_section
;
2065 /* Return the bfd owner of SECTION. */
2068 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2070 if (section
->is_virtual
)
2072 section
= get_containing_section (section
);
2073 gdb_assert (!section
->is_virtual
);
2075 return section
->s
.asection
->owner
;
2078 /* Return the bfd section of SECTION.
2079 Returns NULL if the section is not present. */
2082 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2084 if (section
->is_virtual
)
2086 section
= get_containing_section (section
);
2087 gdb_assert (!section
->is_virtual
);
2089 return section
->s
.asection
;
2092 /* Return the name of SECTION. */
2095 get_section_name (const struct dwarf2_section_info
*section
)
2097 asection
*sectp
= get_section_bfd_section (section
);
2099 gdb_assert (sectp
!= NULL
);
2100 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2103 /* Return the name of the file SECTION is in. */
2106 get_section_file_name (const struct dwarf2_section_info
*section
)
2108 bfd
*abfd
= get_section_bfd_owner (section
);
2110 return bfd_get_filename (abfd
);
2113 /* Return the id of SECTION.
2114 Returns 0 if SECTION doesn't exist. */
2117 get_section_id (const struct dwarf2_section_info
*section
)
2119 asection
*sectp
= get_section_bfd_section (section
);
2126 /* Return the flags of SECTION.
2127 SECTION (or containing section if this is a virtual section) must exist. */
2130 get_section_flags (const struct dwarf2_section_info
*section
)
2132 asection
*sectp
= get_section_bfd_section (section
);
2134 gdb_assert (sectp
!= NULL
);
2135 return bfd_get_section_flags (sectp
->owner
, sectp
);
2138 /* When loading sections, we look either for uncompressed section or for
2139 compressed section names. */
2142 section_is_p (const char *section_name
,
2143 const struct dwarf2_section_names
*names
)
2145 if (names
->normal
!= NULL
2146 && strcmp (section_name
, names
->normal
) == 0)
2148 if (names
->compressed
!= NULL
2149 && strcmp (section_name
, names
->compressed
) == 0)
2154 /* This function is mapped across the sections and remembers the
2155 offset and size of each of the debugging sections we are interested
2159 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2161 const struct dwarf2_debug_sections
*names
;
2162 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2165 names
= &dwarf2_elf_names
;
2167 names
= (const struct dwarf2_debug_sections
*) vnames
;
2169 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2172 else if (section_is_p (sectp
->name
, &names
->info
))
2174 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2175 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2177 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2179 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2180 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2182 else if (section_is_p (sectp
->name
, &names
->line
))
2184 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2185 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2187 else if (section_is_p (sectp
->name
, &names
->loc
))
2189 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2190 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2192 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2194 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2195 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2197 else if (section_is_p (sectp
->name
, &names
->macro
))
2199 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2200 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2202 else if (section_is_p (sectp
->name
, &names
->str
))
2204 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2205 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2207 else if (section_is_p (sectp
->name
, &names
->addr
))
2209 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2210 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2212 else if (section_is_p (sectp
->name
, &names
->frame
))
2214 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2215 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2217 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2219 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2220 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2222 else if (section_is_p (sectp
->name
, &names
->ranges
))
2224 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2225 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2227 else if (section_is_p (sectp
->name
, &names
->types
))
2229 struct dwarf2_section_info type_section
;
2231 memset (&type_section
, 0, sizeof (type_section
));
2232 type_section
.s
.asection
= sectp
;
2233 type_section
.size
= bfd_get_section_size (sectp
);
2235 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2238 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2240 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2241 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2244 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2245 && bfd_section_vma (abfd
, sectp
) == 0)
2246 dwarf2_per_objfile
->has_section_at_zero
= 1;
2249 /* A helper function that decides whether a section is empty,
2253 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2255 if (section
->is_virtual
)
2256 return section
->size
== 0;
2257 return section
->s
.asection
== NULL
|| section
->size
== 0;
2260 /* Read the contents of the section INFO.
2261 OBJFILE is the main object file, but not necessarily the file where
2262 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2264 If the section is compressed, uncompress it before returning. */
2267 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2271 gdb_byte
*buf
, *retbuf
;
2275 info
->buffer
= NULL
;
2278 if (dwarf2_section_empty_p (info
))
2281 sectp
= get_section_bfd_section (info
);
2283 /* If this is a virtual section we need to read in the real one first. */
2284 if (info
->is_virtual
)
2286 struct dwarf2_section_info
*containing_section
=
2287 get_containing_section (info
);
2289 gdb_assert (sectp
!= NULL
);
2290 if ((sectp
->flags
& SEC_RELOC
) != 0)
2292 error (_("Dwarf Error: DWP format V2 with relocations is not"
2293 " supported in section %s [in module %s]"),
2294 get_section_name (info
), get_section_file_name (info
));
2296 dwarf2_read_section (objfile
, containing_section
);
2297 /* Other code should have already caught virtual sections that don't
2299 gdb_assert (info
->virtual_offset
+ info
->size
2300 <= containing_section
->size
);
2301 /* If the real section is empty or there was a problem reading the
2302 section we shouldn't get here. */
2303 gdb_assert (containing_section
->buffer
!= NULL
);
2304 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2308 /* If the section has relocations, we must read it ourselves.
2309 Otherwise we attach it to the BFD. */
2310 if ((sectp
->flags
& SEC_RELOC
) == 0)
2312 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2316 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2319 /* When debugging .o files, we may need to apply relocations; see
2320 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2321 We never compress sections in .o files, so we only need to
2322 try this when the section is not compressed. */
2323 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2326 info
->buffer
= retbuf
;
2330 abfd
= get_section_bfd_owner (info
);
2331 gdb_assert (abfd
!= NULL
);
2333 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2334 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2336 error (_("Dwarf Error: Can't read DWARF data"
2337 " in section %s [in module %s]"),
2338 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2342 /* A helper function that returns the size of a section in a safe way.
2343 If you are positive that the section has been read before using the
2344 size, then it is safe to refer to the dwarf2_section_info object's
2345 "size" field directly. In other cases, you must call this
2346 function, because for compressed sections the size field is not set
2347 correctly until the section has been read. */
2349 static bfd_size_type
2350 dwarf2_section_size (struct objfile
*objfile
,
2351 struct dwarf2_section_info
*info
)
2354 dwarf2_read_section (objfile
, info
);
2358 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2362 dwarf2_get_section_info (struct objfile
*objfile
,
2363 enum dwarf2_section_enum sect
,
2364 asection
**sectp
, const gdb_byte
**bufp
,
2365 bfd_size_type
*sizep
)
2367 struct dwarf2_per_objfile
*data
2368 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2369 struct dwarf2_section_info
*info
;
2371 /* We may see an objfile without any DWARF, in which case we just
2382 case DWARF2_DEBUG_FRAME
:
2383 info
= &data
->frame
;
2385 case DWARF2_EH_FRAME
:
2386 info
= &data
->eh_frame
;
2389 gdb_assert_not_reached ("unexpected section");
2392 dwarf2_read_section (objfile
, info
);
2394 *sectp
= get_section_bfd_section (info
);
2395 *bufp
= info
->buffer
;
2396 *sizep
= info
->size
;
2399 /* A helper function to find the sections for a .dwz file. */
2402 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2404 struct dwz_file
*dwz_file
= arg
;
2406 /* Note that we only support the standard ELF names, because .dwz
2407 is ELF-only (at the time of writing). */
2408 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2410 dwz_file
->abbrev
.s
.asection
= sectp
;
2411 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2413 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2415 dwz_file
->info
.s
.asection
= sectp
;
2416 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2418 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2420 dwz_file
->str
.s
.asection
= sectp
;
2421 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2423 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2425 dwz_file
->line
.s
.asection
= sectp
;
2426 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2428 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2430 dwz_file
->macro
.s
.asection
= sectp
;
2431 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2433 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2435 dwz_file
->gdb_index
.s
.asection
= sectp
;
2436 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2440 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2441 there is no .gnu_debugaltlink section in the file. Error if there
2442 is such a section but the file cannot be found. */
2444 static struct dwz_file
*
2445 dwarf2_get_dwz_file (void)
2449 struct cleanup
*cleanup
;
2450 const char *filename
;
2451 struct dwz_file
*result
;
2452 bfd_size_type buildid_len_arg
;
2456 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2457 return dwarf2_per_objfile
->dwz_file
;
2459 bfd_set_error (bfd_error_no_error
);
2460 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2461 &buildid_len_arg
, &buildid
);
2464 if (bfd_get_error () == bfd_error_no_error
)
2466 error (_("could not read '.gnu_debugaltlink' section: %s"),
2467 bfd_errmsg (bfd_get_error ()));
2469 cleanup
= make_cleanup (xfree
, data
);
2470 make_cleanup (xfree
, buildid
);
2472 buildid_len
= (size_t) buildid_len_arg
;
2474 filename
= (const char *) data
;
2475 if (!IS_ABSOLUTE_PATH (filename
))
2477 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2480 make_cleanup (xfree
, abs
);
2481 abs
= ldirname (abs
);
2482 make_cleanup (xfree
, abs
);
2484 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2485 make_cleanup (xfree
, rel
);
2489 /* First try the file name given in the section. If that doesn't
2490 work, try to use the build-id instead. */
2491 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2492 if (dwz_bfd
!= NULL
)
2494 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2496 gdb_bfd_unref (dwz_bfd
);
2501 if (dwz_bfd
== NULL
)
2502 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2504 if (dwz_bfd
== NULL
)
2505 error (_("could not find '.gnu_debugaltlink' file for %s"),
2506 objfile_name (dwarf2_per_objfile
->objfile
));
2508 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2510 result
->dwz_bfd
= dwz_bfd
;
2512 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2514 do_cleanups (cleanup
);
2516 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2517 dwarf2_per_objfile
->dwz_file
= result
;
2521 /* DWARF quick_symbols_functions support. */
2523 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2524 unique line tables, so we maintain a separate table of all .debug_line
2525 derived entries to support the sharing.
2526 All the quick functions need is the list of file names. We discard the
2527 line_header when we're done and don't need to record it here. */
2528 struct quick_file_names
2530 /* The data used to construct the hash key. */
2531 struct stmt_list_hash hash
;
2533 /* The number of entries in file_names, real_names. */
2534 unsigned int num_file_names
;
2536 /* The file names from the line table, after being run through
2538 const char **file_names
;
2540 /* The file names from the line table after being run through
2541 gdb_realpath. These are computed lazily. */
2542 const char **real_names
;
2545 /* When using the index (and thus not using psymtabs), each CU has an
2546 object of this type. This is used to hold information needed by
2547 the various "quick" methods. */
2548 struct dwarf2_per_cu_quick_data
2550 /* The file table. This can be NULL if there was no file table
2551 or it's currently not read in.
2552 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2553 struct quick_file_names
*file_names
;
2555 /* The corresponding symbol table. This is NULL if symbols for this
2556 CU have not yet been read. */
2557 struct compunit_symtab
*compunit_symtab
;
2559 /* A temporary mark bit used when iterating over all CUs in
2560 expand_symtabs_matching. */
2561 unsigned int mark
: 1;
2563 /* True if we've tried to read the file table and found there isn't one.
2564 There will be no point in trying to read it again next time. */
2565 unsigned int no_file_data
: 1;
2568 /* Utility hash function for a stmt_list_hash. */
2571 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2575 if (stmt_list_hash
->dwo_unit
!= NULL
)
2576 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2577 v
+= stmt_list_hash
->line_offset
.sect_off
;
2581 /* Utility equality function for a stmt_list_hash. */
2584 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2585 const struct stmt_list_hash
*rhs
)
2587 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2589 if (lhs
->dwo_unit
!= NULL
2590 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2593 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2596 /* Hash function for a quick_file_names. */
2599 hash_file_name_entry (const void *e
)
2601 const struct quick_file_names
*file_data
= e
;
2603 return hash_stmt_list_entry (&file_data
->hash
);
2606 /* Equality function for a quick_file_names. */
2609 eq_file_name_entry (const void *a
, const void *b
)
2611 const struct quick_file_names
*ea
= a
;
2612 const struct quick_file_names
*eb
= b
;
2614 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2617 /* Delete function for a quick_file_names. */
2620 delete_file_name_entry (void *e
)
2622 struct quick_file_names
*file_data
= e
;
2625 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2627 xfree ((void*) file_data
->file_names
[i
]);
2628 if (file_data
->real_names
)
2629 xfree ((void*) file_data
->real_names
[i
]);
2632 /* The space for the struct itself lives on objfile_obstack,
2633 so we don't free it here. */
2636 /* Create a quick_file_names hash table. */
2639 create_quick_file_names_table (unsigned int nr_initial_entries
)
2641 return htab_create_alloc (nr_initial_entries
,
2642 hash_file_name_entry
, eq_file_name_entry
,
2643 delete_file_name_entry
, xcalloc
, xfree
);
2646 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2647 have to be created afterwards. You should call age_cached_comp_units after
2648 processing PER_CU->CU. dw2_setup must have been already called. */
2651 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2653 if (per_cu
->is_debug_types
)
2654 load_full_type_unit (per_cu
);
2656 load_full_comp_unit (per_cu
, language_minimal
);
2658 gdb_assert (per_cu
->cu
!= NULL
);
2660 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2663 /* Read in the symbols for PER_CU. */
2666 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2668 struct cleanup
*back_to
;
2670 /* Skip type_unit_groups, reading the type units they contain
2671 is handled elsewhere. */
2672 if (IS_TYPE_UNIT_GROUP (per_cu
))
2675 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2677 if (dwarf2_per_objfile
->using_index
2678 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2679 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2681 queue_comp_unit (per_cu
, language_minimal
);
2684 /* If we just loaded a CU from a DWO, and we're working with an index
2685 that may badly handle TUs, load all the TUs in that DWO as well.
2686 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2687 if (!per_cu
->is_debug_types
2688 && per_cu
->cu
->dwo_unit
!= NULL
2689 && dwarf2_per_objfile
->index_table
!= NULL
2690 && dwarf2_per_objfile
->index_table
->version
<= 7
2691 /* DWP files aren't supported yet. */
2692 && get_dwp_file () == NULL
)
2693 queue_and_load_all_dwo_tus (per_cu
);
2698 /* Age the cache, releasing compilation units that have not
2699 been used recently. */
2700 age_cached_comp_units ();
2702 do_cleanups (back_to
);
2705 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2706 the objfile from which this CU came. Returns the resulting symbol
2709 static struct compunit_symtab
*
2710 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2712 gdb_assert (dwarf2_per_objfile
->using_index
);
2713 if (!per_cu
->v
.quick
->compunit_symtab
)
2715 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2716 increment_reading_symtab ();
2717 dw2_do_instantiate_symtab (per_cu
);
2718 process_cu_includes ();
2719 do_cleanups (back_to
);
2722 return per_cu
->v
.quick
->compunit_symtab
;
2725 /* Return the CU/TU given its index.
2727 This is intended for loops like:
2729 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2730 + dwarf2_per_objfile->n_type_units); ++i)
2732 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2738 static struct dwarf2_per_cu_data
*
2739 dw2_get_cutu (int index
)
2741 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2743 index
-= dwarf2_per_objfile
->n_comp_units
;
2744 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2745 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2748 return dwarf2_per_objfile
->all_comp_units
[index
];
2751 /* Return the CU given its index.
2752 This differs from dw2_get_cutu in that it's for when you know INDEX
2755 static struct dwarf2_per_cu_data
*
2756 dw2_get_cu (int index
)
2758 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2760 return dwarf2_per_objfile
->all_comp_units
[index
];
2763 /* A helper for create_cus_from_index that handles a given list of
2767 create_cus_from_index_list (struct objfile
*objfile
,
2768 const gdb_byte
*cu_list
, offset_type n_elements
,
2769 struct dwarf2_section_info
*section
,
2775 for (i
= 0; i
< n_elements
; i
+= 2)
2777 struct dwarf2_per_cu_data
*the_cu
;
2778 ULONGEST offset
, length
;
2780 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2781 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2782 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2785 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2786 struct dwarf2_per_cu_data
);
2787 the_cu
->offset
.sect_off
= offset
;
2788 the_cu
->length
= length
;
2789 the_cu
->objfile
= objfile
;
2790 the_cu
->section
= section
;
2791 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2792 struct dwarf2_per_cu_quick_data
);
2793 the_cu
->is_dwz
= is_dwz
;
2794 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2798 /* Read the CU list from the mapped index, and use it to create all
2799 the CU objects for this objfile. */
2802 create_cus_from_index (struct objfile
*objfile
,
2803 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2804 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2806 struct dwz_file
*dwz
;
2808 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2809 dwarf2_per_objfile
->all_comp_units
2810 = obstack_alloc (&objfile
->objfile_obstack
,
2811 dwarf2_per_objfile
->n_comp_units
2812 * sizeof (struct dwarf2_per_cu_data
*));
2814 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2815 &dwarf2_per_objfile
->info
, 0, 0);
2817 if (dwz_elements
== 0)
2820 dwz
= dwarf2_get_dwz_file ();
2821 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2822 cu_list_elements
/ 2);
2825 /* Create the signatured type hash table from the index. */
2828 create_signatured_type_table_from_index (struct objfile
*objfile
,
2829 struct dwarf2_section_info
*section
,
2830 const gdb_byte
*bytes
,
2831 offset_type elements
)
2834 htab_t sig_types_hash
;
2836 dwarf2_per_objfile
->n_type_units
2837 = dwarf2_per_objfile
->n_allocated_type_units
2839 dwarf2_per_objfile
->all_type_units
2840 = xmalloc (dwarf2_per_objfile
->n_type_units
2841 * sizeof (struct signatured_type
*));
2843 sig_types_hash
= allocate_signatured_type_table (objfile
);
2845 for (i
= 0; i
< elements
; i
+= 3)
2847 struct signatured_type
*sig_type
;
2848 ULONGEST offset
, type_offset_in_tu
, signature
;
2851 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2852 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2853 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2855 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2858 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2859 struct signatured_type
);
2860 sig_type
->signature
= signature
;
2861 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2862 sig_type
->per_cu
.is_debug_types
= 1;
2863 sig_type
->per_cu
.section
= section
;
2864 sig_type
->per_cu
.offset
.sect_off
= offset
;
2865 sig_type
->per_cu
.objfile
= objfile
;
2866 sig_type
->per_cu
.v
.quick
2867 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2868 struct dwarf2_per_cu_quick_data
);
2870 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2873 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2876 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2879 /* Read the address map data from the mapped index, and use it to
2880 populate the objfile's psymtabs_addrmap. */
2883 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2885 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2886 const gdb_byte
*iter
, *end
;
2887 struct obstack temp_obstack
;
2888 struct addrmap
*mutable_map
;
2889 struct cleanup
*cleanup
;
2892 obstack_init (&temp_obstack
);
2893 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2894 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2896 iter
= index
->address_table
;
2897 end
= iter
+ index
->address_table_size
;
2899 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2903 ULONGEST hi
, lo
, cu_index
;
2904 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2906 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2908 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2913 complaint (&symfile_complaints
,
2914 _(".gdb_index address table has invalid range (%s - %s)"),
2915 hex_string (lo
), hex_string (hi
));
2919 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2921 complaint (&symfile_complaints
,
2922 _(".gdb_index address table has invalid CU number %u"),
2923 (unsigned) cu_index
);
2927 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2928 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2929 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2932 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2933 &objfile
->objfile_obstack
);
2934 do_cleanups (cleanup
);
2937 /* The hash function for strings in the mapped index. This is the same as
2938 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2939 implementation. This is necessary because the hash function is tied to the
2940 format of the mapped index file. The hash values do not have to match with
2943 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2946 mapped_index_string_hash (int index_version
, const void *p
)
2948 const unsigned char *str
= (const unsigned char *) p
;
2952 while ((c
= *str
++) != 0)
2954 if (index_version
>= 5)
2956 r
= r
* 67 + c
- 113;
2962 /* Find a slot in the mapped index INDEX for the object named NAME.
2963 If NAME is found, set *VEC_OUT to point to the CU vector in the
2964 constant pool and return 1. If NAME cannot be found, return 0. */
2967 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2968 offset_type
**vec_out
)
2970 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2972 offset_type slot
, step
;
2973 int (*cmp
) (const char *, const char *);
2975 if (current_language
->la_language
== language_cplus
2976 || current_language
->la_language
== language_java
2977 || current_language
->la_language
== language_fortran
2978 || current_language
->la_language
== language_d
)
2980 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2983 if (strchr (name
, '(') != NULL
)
2985 char *without_params
= cp_remove_params (name
);
2987 if (without_params
!= NULL
)
2989 make_cleanup (xfree
, without_params
);
2990 name
= without_params
;
2995 /* Index version 4 did not support case insensitive searches. But the
2996 indices for case insensitive languages are built in lowercase, therefore
2997 simulate our NAME being searched is also lowercased. */
2998 hash
= mapped_index_string_hash ((index
->version
== 4
2999 && case_sensitivity
== case_sensitive_off
3000 ? 5 : index
->version
),
3003 slot
= hash
& (index
->symbol_table_slots
- 1);
3004 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3005 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3009 /* Convert a slot number to an offset into the table. */
3010 offset_type i
= 2 * slot
;
3012 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3014 do_cleanups (back_to
);
3018 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3019 if (!cmp (name
, str
))
3021 *vec_out
= (offset_type
*) (index
->constant_pool
3022 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3023 do_cleanups (back_to
);
3027 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3031 /* A helper function that reads the .gdb_index from SECTION and fills
3032 in MAP. FILENAME is the name of the file containing the section;
3033 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3034 ok to use deprecated sections.
3036 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3037 out parameters that are filled in with information about the CU and
3038 TU lists in the section.
3040 Returns 1 if all went well, 0 otherwise. */
3043 read_index_from_section (struct objfile
*objfile
,
3044 const char *filename
,
3046 struct dwarf2_section_info
*section
,
3047 struct mapped_index
*map
,
3048 const gdb_byte
**cu_list
,
3049 offset_type
*cu_list_elements
,
3050 const gdb_byte
**types_list
,
3051 offset_type
*types_list_elements
)
3053 const gdb_byte
*addr
;
3054 offset_type version
;
3055 offset_type
*metadata
;
3058 if (dwarf2_section_empty_p (section
))
3061 /* Older elfutils strip versions could keep the section in the main
3062 executable while splitting it for the separate debug info file. */
3063 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3066 dwarf2_read_section (objfile
, section
);
3068 addr
= section
->buffer
;
3069 /* Version check. */
3070 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3071 /* Versions earlier than 3 emitted every copy of a psymbol. This
3072 causes the index to behave very poorly for certain requests. Version 3
3073 contained incomplete addrmap. So, it seems better to just ignore such
3077 static int warning_printed
= 0;
3078 if (!warning_printed
)
3080 warning (_("Skipping obsolete .gdb_index section in %s."),
3082 warning_printed
= 1;
3086 /* Index version 4 uses a different hash function than index version
3089 Versions earlier than 6 did not emit psymbols for inlined
3090 functions. Using these files will cause GDB not to be able to
3091 set breakpoints on inlined functions by name, so we ignore these
3092 indices unless the user has done
3093 "set use-deprecated-index-sections on". */
3094 if (version
< 6 && !deprecated_ok
)
3096 static int warning_printed
= 0;
3097 if (!warning_printed
)
3100 Skipping deprecated .gdb_index section in %s.\n\
3101 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3102 to use the section anyway."),
3104 warning_printed
= 1;
3108 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3109 of the TU (for symbols coming from TUs),
3110 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3111 Plus gold-generated indices can have duplicate entries for global symbols,
3112 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3113 These are just performance bugs, and we can't distinguish gdb-generated
3114 indices from gold-generated ones, so issue no warning here. */
3116 /* Indexes with higher version than the one supported by GDB may be no
3117 longer backward compatible. */
3121 map
->version
= version
;
3122 map
->total_size
= section
->size
;
3124 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3127 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3128 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3132 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3133 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3134 - MAYBE_SWAP (metadata
[i
]))
3138 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3139 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3140 - MAYBE_SWAP (metadata
[i
]));
3143 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3144 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3145 - MAYBE_SWAP (metadata
[i
]))
3146 / (2 * sizeof (offset_type
)));
3149 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3155 /* Read the index file. If everything went ok, initialize the "quick"
3156 elements of all the CUs and return 1. Otherwise, return 0. */
3159 dwarf2_read_index (struct objfile
*objfile
)
3161 struct mapped_index local_map
, *map
;
3162 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3163 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3164 struct dwz_file
*dwz
;
3166 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3167 use_deprecated_index_sections
,
3168 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3169 &cu_list
, &cu_list_elements
,
3170 &types_list
, &types_list_elements
))
3173 /* Don't use the index if it's empty. */
3174 if (local_map
.symbol_table_slots
== 0)
3177 /* If there is a .dwz file, read it so we can get its CU list as
3179 dwz
= dwarf2_get_dwz_file ();
3182 struct mapped_index dwz_map
;
3183 const gdb_byte
*dwz_types_ignore
;
3184 offset_type dwz_types_elements_ignore
;
3186 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3188 &dwz
->gdb_index
, &dwz_map
,
3189 &dwz_list
, &dwz_list_elements
,
3191 &dwz_types_elements_ignore
))
3193 warning (_("could not read '.gdb_index' section from %s; skipping"),
3194 bfd_get_filename (dwz
->dwz_bfd
));
3199 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3202 if (types_list_elements
)
3204 struct dwarf2_section_info
*section
;
3206 /* We can only handle a single .debug_types when we have an
3208 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3211 section
= VEC_index (dwarf2_section_info_def
,
3212 dwarf2_per_objfile
->types
, 0);
3214 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3215 types_list_elements
);
3218 create_addrmap_from_index (objfile
, &local_map
);
3220 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3223 dwarf2_per_objfile
->index_table
= map
;
3224 dwarf2_per_objfile
->using_index
= 1;
3225 dwarf2_per_objfile
->quick_file_names_table
=
3226 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3231 /* A helper for the "quick" functions which sets the global
3232 dwarf2_per_objfile according to OBJFILE. */
3235 dw2_setup (struct objfile
*objfile
)
3237 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3238 gdb_assert (dwarf2_per_objfile
);
3241 /* die_reader_func for dw2_get_file_names. */
3244 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3245 const gdb_byte
*info_ptr
,
3246 struct die_info
*comp_unit_die
,
3250 struct dwarf2_cu
*cu
= reader
->cu
;
3251 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3252 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3253 struct dwarf2_per_cu_data
*lh_cu
;
3254 struct line_header
*lh
;
3255 struct attribute
*attr
;
3257 const char *name
, *comp_dir
;
3259 struct quick_file_names
*qfn
;
3260 unsigned int line_offset
;
3262 gdb_assert (! this_cu
->is_debug_types
);
3264 /* Our callers never want to match partial units -- instead they
3265 will match the enclosing full CU. */
3266 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3268 this_cu
->v
.quick
->no_file_data
= 1;
3277 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3280 struct quick_file_names find_entry
;
3282 line_offset
= DW_UNSND (attr
);
3284 /* We may have already read in this line header (TU line header sharing).
3285 If we have we're done. */
3286 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3287 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3288 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3289 &find_entry
, INSERT
);
3292 lh_cu
->v
.quick
->file_names
= *slot
;
3296 lh
= dwarf_decode_line_header (line_offset
, cu
);
3300 lh_cu
->v
.quick
->no_file_data
= 1;
3304 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3305 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3306 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3307 gdb_assert (slot
!= NULL
);
3310 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3312 qfn
->num_file_names
= lh
->num_file_names
;
3313 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3314 lh
->num_file_names
* sizeof (char *));
3315 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3316 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3317 qfn
->real_names
= NULL
;
3319 free_line_header (lh
);
3321 lh_cu
->v
.quick
->file_names
= qfn
;
3324 /* A helper for the "quick" functions which attempts to read the line
3325 table for THIS_CU. */
3327 static struct quick_file_names
*
3328 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3330 /* This should never be called for TUs. */
3331 gdb_assert (! this_cu
->is_debug_types
);
3332 /* Nor type unit groups. */
3333 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3335 if (this_cu
->v
.quick
->file_names
!= NULL
)
3336 return this_cu
->v
.quick
->file_names
;
3337 /* If we know there is no line data, no point in looking again. */
3338 if (this_cu
->v
.quick
->no_file_data
)
3341 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3343 if (this_cu
->v
.quick
->no_file_data
)
3345 return this_cu
->v
.quick
->file_names
;
3348 /* A helper for the "quick" functions which computes and caches the
3349 real path for a given file name from the line table. */
3352 dw2_get_real_path (struct objfile
*objfile
,
3353 struct quick_file_names
*qfn
, int index
)
3355 if (qfn
->real_names
== NULL
)
3356 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3357 qfn
->num_file_names
, const char *);
3359 if (qfn
->real_names
[index
] == NULL
)
3360 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3362 return qfn
->real_names
[index
];
3365 static struct symtab
*
3366 dw2_find_last_source_symtab (struct objfile
*objfile
)
3368 struct compunit_symtab
*cust
;
3371 dw2_setup (objfile
);
3372 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3373 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3376 return compunit_primary_filetab (cust
);
3379 /* Traversal function for dw2_forget_cached_source_info. */
3382 dw2_free_cached_file_names (void **slot
, void *info
)
3384 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3386 if (file_data
->real_names
)
3390 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3392 xfree ((void*) file_data
->real_names
[i
]);
3393 file_data
->real_names
[i
] = NULL
;
3401 dw2_forget_cached_source_info (struct objfile
*objfile
)
3403 dw2_setup (objfile
);
3405 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3406 dw2_free_cached_file_names
, NULL
);
3409 /* Helper function for dw2_map_symtabs_matching_filename that expands
3410 the symtabs and calls the iterator. */
3413 dw2_map_expand_apply (struct objfile
*objfile
,
3414 struct dwarf2_per_cu_data
*per_cu
,
3415 const char *name
, const char *real_path
,
3416 int (*callback
) (struct symtab
*, void *),
3419 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3421 /* Don't visit already-expanded CUs. */
3422 if (per_cu
->v
.quick
->compunit_symtab
)
3425 /* This may expand more than one symtab, and we want to iterate over
3427 dw2_instantiate_symtab (per_cu
);
3429 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3430 objfile
->compunit_symtabs
, last_made
);
3433 /* Implementation of the map_symtabs_matching_filename method. */
3436 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3437 const char *real_path
,
3438 int (*callback
) (struct symtab
*, void *),
3442 const char *name_basename
= lbasename (name
);
3444 dw2_setup (objfile
);
3446 /* The rule is CUs specify all the files, including those used by
3447 any TU, so there's no need to scan TUs here. */
3449 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3452 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3453 struct quick_file_names
*file_data
;
3455 /* We only need to look at symtabs not already expanded. */
3456 if (per_cu
->v
.quick
->compunit_symtab
)
3459 file_data
= dw2_get_file_names (per_cu
);
3460 if (file_data
== NULL
)
3463 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3465 const char *this_name
= file_data
->file_names
[j
];
3466 const char *this_real_name
;
3468 if (compare_filenames_for_search (this_name
, name
))
3470 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3476 /* Before we invoke realpath, which can get expensive when many
3477 files are involved, do a quick comparison of the basenames. */
3478 if (! basenames_may_differ
3479 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3482 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3483 if (compare_filenames_for_search (this_real_name
, name
))
3485 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3491 if (real_path
!= NULL
)
3493 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3494 gdb_assert (IS_ABSOLUTE_PATH (name
));
3495 if (this_real_name
!= NULL
3496 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3498 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3510 /* Struct used to manage iterating over all CUs looking for a symbol. */
3512 struct dw2_symtab_iterator
3514 /* The internalized form of .gdb_index. */
3515 struct mapped_index
*index
;
3516 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3517 int want_specific_block
;
3518 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3519 Unused if !WANT_SPECIFIC_BLOCK. */
3521 /* The kind of symbol we're looking for. */
3523 /* The list of CUs from the index entry of the symbol,
3524 or NULL if not found. */
3526 /* The next element in VEC to look at. */
3528 /* The number of elements in VEC, or zero if there is no match. */
3530 /* Have we seen a global version of the symbol?
3531 If so we can ignore all further global instances.
3532 This is to work around gold/15646, inefficient gold-generated
3537 /* Initialize the index symtab iterator ITER.
3538 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3539 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3542 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3543 struct mapped_index
*index
,
3544 int want_specific_block
,
3549 iter
->index
= index
;
3550 iter
->want_specific_block
= want_specific_block
;
3551 iter
->block_index
= block_index
;
3552 iter
->domain
= domain
;
3554 iter
->global_seen
= 0;
3556 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3557 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3565 /* Return the next matching CU or NULL if there are no more. */
3567 static struct dwarf2_per_cu_data
*
3568 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3570 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3572 offset_type cu_index_and_attrs
=
3573 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3574 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3575 struct dwarf2_per_cu_data
*per_cu
;
3576 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3577 /* This value is only valid for index versions >= 7. */
3578 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3579 gdb_index_symbol_kind symbol_kind
=
3580 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3581 /* Only check the symbol attributes if they're present.
3582 Indices prior to version 7 don't record them,
3583 and indices >= 7 may elide them for certain symbols
3584 (gold does this). */
3586 (iter
->index
->version
>= 7
3587 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3589 /* Don't crash on bad data. */
3590 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3591 + dwarf2_per_objfile
->n_type_units
))
3593 complaint (&symfile_complaints
,
3594 _(".gdb_index entry has bad CU index"
3596 objfile_name (dwarf2_per_objfile
->objfile
));
3600 per_cu
= dw2_get_cutu (cu_index
);
3602 /* Skip if already read in. */
3603 if (per_cu
->v
.quick
->compunit_symtab
)
3606 /* Check static vs global. */
3609 if (iter
->want_specific_block
3610 && want_static
!= is_static
)
3612 /* Work around gold/15646. */
3613 if (!is_static
&& iter
->global_seen
)
3616 iter
->global_seen
= 1;
3619 /* Only check the symbol's kind if it has one. */
3622 switch (iter
->domain
)
3625 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3626 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3627 /* Some types are also in VAR_DOMAIN. */
3628 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3632 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3636 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3651 static struct compunit_symtab
*
3652 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3653 const char *name
, domain_enum domain
)
3655 struct compunit_symtab
*stab_best
= NULL
;
3656 struct mapped_index
*index
;
3658 dw2_setup (objfile
);
3660 index
= dwarf2_per_objfile
->index_table
;
3662 /* index is NULL if OBJF_READNOW. */
3665 struct dw2_symtab_iterator iter
;
3666 struct dwarf2_per_cu_data
*per_cu
;
3668 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3670 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3672 struct symbol
*sym
, *with_opaque
= NULL
;
3673 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3674 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3675 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3677 sym
= block_find_symbol (block
, name
, domain
,
3678 block_find_non_opaque_type_preferred
,
3681 /* Some caution must be observed with overloaded functions
3682 and methods, since the index will not contain any overload
3683 information (but NAME might contain it). */
3686 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3688 if (with_opaque
!= NULL
3689 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3692 /* Keep looking through other CUs. */
3700 dw2_print_stats (struct objfile
*objfile
)
3702 int i
, total
, count
;
3704 dw2_setup (objfile
);
3705 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3707 for (i
= 0; i
< total
; ++i
)
3709 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3711 if (!per_cu
->v
.quick
->compunit_symtab
)
3714 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3715 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3718 /* This dumps minimal information about the index.
3719 It is called via "mt print objfiles".
3720 One use is to verify .gdb_index has been loaded by the
3721 gdb.dwarf2/gdb-index.exp testcase. */
3724 dw2_dump (struct objfile
*objfile
)
3726 dw2_setup (objfile
);
3727 gdb_assert (dwarf2_per_objfile
->using_index
);
3728 printf_filtered (".gdb_index:");
3729 if (dwarf2_per_objfile
->index_table
!= NULL
)
3731 printf_filtered (" version %d\n",
3732 dwarf2_per_objfile
->index_table
->version
);
3735 printf_filtered (" faked for \"readnow\"\n");
3736 printf_filtered ("\n");
3740 dw2_relocate (struct objfile
*objfile
,
3741 const struct section_offsets
*new_offsets
,
3742 const struct section_offsets
*delta
)
3744 /* There's nothing to relocate here. */
3748 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3749 const char *func_name
)
3751 struct mapped_index
*index
;
3753 dw2_setup (objfile
);
3755 index
= dwarf2_per_objfile
->index_table
;
3757 /* index is NULL if OBJF_READNOW. */
3760 struct dw2_symtab_iterator iter
;
3761 struct dwarf2_per_cu_data
*per_cu
;
3763 /* Note: It doesn't matter what we pass for block_index here. */
3764 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3767 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3768 dw2_instantiate_symtab (per_cu
);
3773 dw2_expand_all_symtabs (struct objfile
*objfile
)
3777 dw2_setup (objfile
);
3779 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3780 + dwarf2_per_objfile
->n_type_units
); ++i
)
3782 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3784 dw2_instantiate_symtab (per_cu
);
3789 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3790 const char *fullname
)
3794 dw2_setup (objfile
);
3796 /* We don't need to consider type units here.
3797 This is only called for examining code, e.g. expand_line_sal.
3798 There can be an order of magnitude (or more) more type units
3799 than comp units, and we avoid them if we can. */
3801 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3804 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3805 struct quick_file_names
*file_data
;
3807 /* We only need to look at symtabs not already expanded. */
3808 if (per_cu
->v
.quick
->compunit_symtab
)
3811 file_data
= dw2_get_file_names (per_cu
);
3812 if (file_data
== NULL
)
3815 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3817 const char *this_fullname
= file_data
->file_names
[j
];
3819 if (filename_cmp (this_fullname
, fullname
) == 0)
3821 dw2_instantiate_symtab (per_cu
);
3829 dw2_map_matching_symbols (struct objfile
*objfile
,
3830 const char * name
, domain_enum domain
,
3832 int (*callback
) (struct block
*,
3833 struct symbol
*, void *),
3834 void *data
, symbol_compare_ftype
*match
,
3835 symbol_compare_ftype
*ordered_compare
)
3837 /* Currently unimplemented; used for Ada. The function can be called if the
3838 current language is Ada for a non-Ada objfile using GNU index. As Ada
3839 does not look for non-Ada symbols this function should just return. */
3843 dw2_expand_symtabs_matching
3844 (struct objfile
*objfile
,
3845 expand_symtabs_file_matcher_ftype
*file_matcher
,
3846 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3847 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3848 enum search_domain kind
,
3853 struct mapped_index
*index
;
3855 dw2_setup (objfile
);
3857 /* index_table is NULL if OBJF_READNOW. */
3858 if (!dwarf2_per_objfile
->index_table
)
3860 index
= dwarf2_per_objfile
->index_table
;
3862 if (file_matcher
!= NULL
)
3864 struct cleanup
*cleanup
;
3865 htab_t visited_found
, visited_not_found
;
3867 visited_found
= htab_create_alloc (10,
3868 htab_hash_pointer
, htab_eq_pointer
,
3869 NULL
, xcalloc
, xfree
);
3870 cleanup
= make_cleanup_htab_delete (visited_found
);
3871 visited_not_found
= htab_create_alloc (10,
3872 htab_hash_pointer
, htab_eq_pointer
,
3873 NULL
, xcalloc
, xfree
);
3874 make_cleanup_htab_delete (visited_not_found
);
3876 /* The rule is CUs specify all the files, including those used by
3877 any TU, so there's no need to scan TUs here. */
3879 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3882 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3883 struct quick_file_names
*file_data
;
3888 per_cu
->v
.quick
->mark
= 0;
3890 /* We only need to look at symtabs not already expanded. */
3891 if (per_cu
->v
.quick
->compunit_symtab
)
3894 file_data
= dw2_get_file_names (per_cu
);
3895 if (file_data
== NULL
)
3898 if (htab_find (visited_not_found
, file_data
) != NULL
)
3900 else if (htab_find (visited_found
, file_data
) != NULL
)
3902 per_cu
->v
.quick
->mark
= 1;
3906 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3908 const char *this_real_name
;
3910 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3912 per_cu
->v
.quick
->mark
= 1;
3916 /* Before we invoke realpath, which can get expensive when many
3917 files are involved, do a quick comparison of the basenames. */
3918 if (!basenames_may_differ
3919 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3923 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3924 if (file_matcher (this_real_name
, data
, 0))
3926 per_cu
->v
.quick
->mark
= 1;
3931 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3933 : visited_not_found
,
3938 do_cleanups (cleanup
);
3941 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3943 offset_type idx
= 2 * iter
;
3945 offset_type
*vec
, vec_len
, vec_idx
;
3946 int global_seen
= 0;
3950 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3953 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3955 if (! (*symbol_matcher
) (name
, data
))
3958 /* The name was matched, now expand corresponding CUs that were
3960 vec
= (offset_type
*) (index
->constant_pool
3961 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3962 vec_len
= MAYBE_SWAP (vec
[0]);
3963 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3965 struct dwarf2_per_cu_data
*per_cu
;
3966 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3967 /* This value is only valid for index versions >= 7. */
3968 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3969 gdb_index_symbol_kind symbol_kind
=
3970 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3971 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3972 /* Only check the symbol attributes if they're present.
3973 Indices prior to version 7 don't record them,
3974 and indices >= 7 may elide them for certain symbols
3975 (gold does this). */
3977 (index
->version
>= 7
3978 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3980 /* Work around gold/15646. */
3983 if (!is_static
&& global_seen
)
3989 /* Only check the symbol's kind if it has one. */
3994 case VARIABLES_DOMAIN
:
3995 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3998 case FUNCTIONS_DOMAIN
:
3999 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4003 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4011 /* Don't crash on bad data. */
4012 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4013 + dwarf2_per_objfile
->n_type_units
))
4015 complaint (&symfile_complaints
,
4016 _(".gdb_index entry has bad CU index"
4017 " [in module %s]"), objfile_name (objfile
));
4021 per_cu
= dw2_get_cutu (cu_index
);
4022 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4024 int symtab_was_null
=
4025 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4027 dw2_instantiate_symtab (per_cu
);
4029 if (expansion_notify
!= NULL
4031 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4033 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4041 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4044 static struct compunit_symtab
*
4045 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4050 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4051 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4054 if (cust
->includes
== NULL
)
4057 for (i
= 0; cust
->includes
[i
]; ++i
)
4059 struct compunit_symtab
*s
= cust
->includes
[i
];
4061 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4069 static struct compunit_symtab
*
4070 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4071 struct bound_minimal_symbol msymbol
,
4073 struct obj_section
*section
,
4076 struct dwarf2_per_cu_data
*data
;
4077 struct compunit_symtab
*result
;
4079 dw2_setup (objfile
);
4081 if (!objfile
->psymtabs_addrmap
)
4084 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4088 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4089 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4090 paddress (get_objfile_arch (objfile
), pc
));
4093 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4095 gdb_assert (result
!= NULL
);
4100 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4101 void *data
, int need_fullname
)
4104 struct cleanup
*cleanup
;
4105 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4106 NULL
, xcalloc
, xfree
);
4108 cleanup
= make_cleanup_htab_delete (visited
);
4109 dw2_setup (objfile
);
4111 /* The rule is CUs specify all the files, including those used by
4112 any TU, so there's no need to scan TUs here.
4113 We can ignore file names coming from already-expanded CUs. */
4115 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4117 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4119 if (per_cu
->v
.quick
->compunit_symtab
)
4121 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4124 *slot
= per_cu
->v
.quick
->file_names
;
4128 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4131 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4132 struct quick_file_names
*file_data
;
4135 /* We only need to look at symtabs not already expanded. */
4136 if (per_cu
->v
.quick
->compunit_symtab
)
4139 file_data
= dw2_get_file_names (per_cu
);
4140 if (file_data
== NULL
)
4143 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4146 /* Already visited. */
4151 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4153 const char *this_real_name
;
4156 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4158 this_real_name
= NULL
;
4159 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4163 do_cleanups (cleanup
);
4167 dw2_has_symbols (struct objfile
*objfile
)
4172 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4175 dw2_find_last_source_symtab
,
4176 dw2_forget_cached_source_info
,
4177 dw2_map_symtabs_matching_filename
,
4182 dw2_expand_symtabs_for_function
,
4183 dw2_expand_all_symtabs
,
4184 dw2_expand_symtabs_with_fullname
,
4185 dw2_map_matching_symbols
,
4186 dw2_expand_symtabs_matching
,
4187 dw2_find_pc_sect_compunit_symtab
,
4188 dw2_map_symbol_filenames
4191 /* Initialize for reading DWARF for this objfile. Return 0 if this
4192 file will use psymtabs, or 1 if using the GNU index. */
4195 dwarf2_initialize_objfile (struct objfile
*objfile
)
4197 /* If we're about to read full symbols, don't bother with the
4198 indices. In this case we also don't care if some other debug
4199 format is making psymtabs, because they are all about to be
4201 if ((objfile
->flags
& OBJF_READNOW
))
4205 dwarf2_per_objfile
->using_index
= 1;
4206 create_all_comp_units (objfile
);
4207 create_all_type_units (objfile
);
4208 dwarf2_per_objfile
->quick_file_names_table
=
4209 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4211 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4212 + dwarf2_per_objfile
->n_type_units
); ++i
)
4214 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4216 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4217 struct dwarf2_per_cu_quick_data
);
4220 /* Return 1 so that gdb sees the "quick" functions. However,
4221 these functions will be no-ops because we will have expanded
4226 if (dwarf2_read_index (objfile
))
4234 /* Build a partial symbol table. */
4237 dwarf2_build_psymtabs (struct objfile
*objfile
)
4240 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4242 init_psymbol_list (objfile
, 1024);
4247 /* This isn't really ideal: all the data we allocate on the
4248 objfile's obstack is still uselessly kept around. However,
4249 freeing it seems unsafe. */
4250 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4252 dwarf2_build_psymtabs_hard (objfile
);
4253 discard_cleanups (cleanups
);
4255 CATCH (except
, RETURN_MASK_ERROR
)
4257 exception_print (gdb_stderr
, except
);
4262 /* Return the total length of the CU described by HEADER. */
4265 get_cu_length (const struct comp_unit_head
*header
)
4267 return header
->initial_length_size
+ header
->length
;
4270 /* Return TRUE if OFFSET is within CU_HEADER. */
4273 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4275 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4276 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4278 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4281 /* Find the base address of the compilation unit for range lists and
4282 location lists. It will normally be specified by DW_AT_low_pc.
4283 In DWARF-3 draft 4, the base address could be overridden by
4284 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4285 compilation units with discontinuous ranges. */
4288 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4290 struct attribute
*attr
;
4293 cu
->base_address
= 0;
4295 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4298 cu
->base_address
= attr_value_as_address (attr
);
4303 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4306 cu
->base_address
= attr_value_as_address (attr
);
4312 /* Read in the comp unit header information from the debug_info at info_ptr.
4313 NOTE: This leaves members offset, first_die_offset to be filled in
4316 static const gdb_byte
*
4317 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4318 const gdb_byte
*info_ptr
, bfd
*abfd
)
4321 unsigned int bytes_read
;
4323 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4324 cu_header
->initial_length_size
= bytes_read
;
4325 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4326 info_ptr
+= bytes_read
;
4327 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4329 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4331 info_ptr
+= bytes_read
;
4332 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4334 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4335 if (signed_addr
< 0)
4336 internal_error (__FILE__
, __LINE__
,
4337 _("read_comp_unit_head: dwarf from non elf file"));
4338 cu_header
->signed_addr_p
= signed_addr
;
4343 /* Helper function that returns the proper abbrev section for
4346 static struct dwarf2_section_info
*
4347 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4349 struct dwarf2_section_info
*abbrev
;
4351 if (this_cu
->is_dwz
)
4352 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4354 abbrev
= &dwarf2_per_objfile
->abbrev
;
4359 /* Subroutine of read_and_check_comp_unit_head and
4360 read_and_check_type_unit_head to simplify them.
4361 Perform various error checking on the header. */
4364 error_check_comp_unit_head (struct comp_unit_head
*header
,
4365 struct dwarf2_section_info
*section
,
4366 struct dwarf2_section_info
*abbrev_section
)
4368 bfd
*abfd
= get_section_bfd_owner (section
);
4369 const char *filename
= get_section_file_name (section
);
4371 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4372 error (_("Dwarf Error: wrong version in compilation unit header "
4373 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4376 if (header
->abbrev_offset
.sect_off
4377 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4378 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4379 "(offset 0x%lx + 6) [in module %s]"),
4380 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4383 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4384 avoid potential 32-bit overflow. */
4385 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4387 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4388 "(offset 0x%lx + 0) [in module %s]"),
4389 (long) header
->length
, (long) header
->offset
.sect_off
,
4393 /* Read in a CU/TU header and perform some basic error checking.
4394 The contents of the header are stored in HEADER.
4395 The result is a pointer to the start of the first DIE. */
4397 static const gdb_byte
*
4398 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4399 struct dwarf2_section_info
*section
,
4400 struct dwarf2_section_info
*abbrev_section
,
4401 const gdb_byte
*info_ptr
,
4402 int is_debug_types_section
)
4404 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4405 bfd
*abfd
= get_section_bfd_owner (section
);
4407 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4409 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4411 /* If we're reading a type unit, skip over the signature and
4412 type_offset fields. */
4413 if (is_debug_types_section
)
4414 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4416 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4418 error_check_comp_unit_head (header
, section
, abbrev_section
);
4423 /* Read in the types comp unit header information from .debug_types entry at
4424 types_ptr. The result is a pointer to one past the end of the header. */
4426 static const gdb_byte
*
4427 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4428 struct dwarf2_section_info
*section
,
4429 struct dwarf2_section_info
*abbrev_section
,
4430 const gdb_byte
*info_ptr
,
4431 ULONGEST
*signature
,
4432 cu_offset
*type_offset_in_tu
)
4434 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4435 bfd
*abfd
= get_section_bfd_owner (section
);
4437 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4439 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4441 /* If we're reading a type unit, skip over the signature and
4442 type_offset fields. */
4443 if (signature
!= NULL
)
4444 *signature
= read_8_bytes (abfd
, info_ptr
);
4446 if (type_offset_in_tu
!= NULL
)
4447 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4448 header
->offset_size
);
4449 info_ptr
+= header
->offset_size
;
4451 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4453 error_check_comp_unit_head (header
, section
, abbrev_section
);
4458 /* Fetch the abbreviation table offset from a comp or type unit header. */
4461 read_abbrev_offset (struct dwarf2_section_info
*section
,
4464 bfd
*abfd
= get_section_bfd_owner (section
);
4465 const gdb_byte
*info_ptr
;
4466 unsigned int length
, initial_length_size
, offset_size
;
4467 sect_offset abbrev_offset
;
4469 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4470 info_ptr
= section
->buffer
+ offset
.sect_off
;
4471 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4472 offset_size
= initial_length_size
== 4 ? 4 : 8;
4473 info_ptr
+= initial_length_size
+ 2 /*version*/;
4474 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4475 return abbrev_offset
;
4478 /* Allocate a new partial symtab for file named NAME and mark this new
4479 partial symtab as being an include of PST. */
4482 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4483 struct objfile
*objfile
)
4485 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4487 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4489 /* It shares objfile->objfile_obstack. */
4490 subpst
->dirname
= pst
->dirname
;
4493 subpst
->textlow
= 0;
4494 subpst
->texthigh
= 0;
4496 subpst
->dependencies
= (struct partial_symtab
**)
4497 obstack_alloc (&objfile
->objfile_obstack
,
4498 sizeof (struct partial_symtab
*));
4499 subpst
->dependencies
[0] = pst
;
4500 subpst
->number_of_dependencies
= 1;
4502 subpst
->globals_offset
= 0;
4503 subpst
->n_global_syms
= 0;
4504 subpst
->statics_offset
= 0;
4505 subpst
->n_static_syms
= 0;
4506 subpst
->compunit_symtab
= NULL
;
4507 subpst
->read_symtab
= pst
->read_symtab
;
4510 /* No private part is necessary for include psymtabs. This property
4511 can be used to differentiate between such include psymtabs and
4512 the regular ones. */
4513 subpst
->read_symtab_private
= NULL
;
4516 /* Read the Line Number Program data and extract the list of files
4517 included by the source file represented by PST. Build an include
4518 partial symtab for each of these included files. */
4521 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4522 struct die_info
*die
,
4523 struct partial_symtab
*pst
)
4525 struct line_header
*lh
= NULL
;
4526 struct attribute
*attr
;
4528 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4530 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4532 return; /* No linetable, so no includes. */
4534 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4535 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4537 free_line_header (lh
);
4541 hash_signatured_type (const void *item
)
4543 const struct signatured_type
*sig_type
= item
;
4545 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4546 return sig_type
->signature
;
4550 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4552 const struct signatured_type
*lhs
= item_lhs
;
4553 const struct signatured_type
*rhs
= item_rhs
;
4555 return lhs
->signature
== rhs
->signature
;
4558 /* Allocate a hash table for signatured types. */
4561 allocate_signatured_type_table (struct objfile
*objfile
)
4563 return htab_create_alloc_ex (41,
4564 hash_signatured_type
,
4567 &objfile
->objfile_obstack
,
4568 hashtab_obstack_allocate
,
4569 dummy_obstack_deallocate
);
4572 /* A helper function to add a signatured type CU to a table. */
4575 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4577 struct signatured_type
*sigt
= *slot
;
4578 struct signatured_type
***datap
= datum
;
4586 /* Create the hash table of all entries in the .debug_types
4587 (or .debug_types.dwo) section(s).
4588 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4589 otherwise it is NULL.
4591 The result is a pointer to the hash table or NULL if there are no types.
4593 Note: This function processes DWO files only, not DWP files. */
4596 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4597 VEC (dwarf2_section_info_def
) *types
)
4599 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4600 htab_t types_htab
= NULL
;
4602 struct dwarf2_section_info
*section
;
4603 struct dwarf2_section_info
*abbrev_section
;
4605 if (VEC_empty (dwarf2_section_info_def
, types
))
4608 abbrev_section
= (dwo_file
!= NULL
4609 ? &dwo_file
->sections
.abbrev
4610 : &dwarf2_per_objfile
->abbrev
);
4612 if (dwarf_read_debug
)
4613 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4614 dwo_file
? ".dwo" : "",
4615 get_section_file_name (abbrev_section
));
4618 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4622 const gdb_byte
*info_ptr
, *end_ptr
;
4624 dwarf2_read_section (objfile
, section
);
4625 info_ptr
= section
->buffer
;
4627 if (info_ptr
== NULL
)
4630 /* We can't set abfd until now because the section may be empty or
4631 not present, in which case the bfd is unknown. */
4632 abfd
= get_section_bfd_owner (section
);
4634 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4635 because we don't need to read any dies: the signature is in the
4638 end_ptr
= info_ptr
+ section
->size
;
4639 while (info_ptr
< end_ptr
)
4642 cu_offset type_offset_in_tu
;
4644 struct signatured_type
*sig_type
;
4645 struct dwo_unit
*dwo_tu
;
4647 const gdb_byte
*ptr
= info_ptr
;
4648 struct comp_unit_head header
;
4649 unsigned int length
;
4651 offset
.sect_off
= ptr
- section
->buffer
;
4653 /* We need to read the type's signature in order to build the hash
4654 table, but we don't need anything else just yet. */
4656 ptr
= read_and_check_type_unit_head (&header
, section
,
4657 abbrev_section
, ptr
,
4658 &signature
, &type_offset_in_tu
);
4660 length
= get_cu_length (&header
);
4662 /* Skip dummy type units. */
4663 if (ptr
>= info_ptr
+ length
4664 || peek_abbrev_code (abfd
, ptr
) == 0)
4670 if (types_htab
== NULL
)
4673 types_htab
= allocate_dwo_unit_table (objfile
);
4675 types_htab
= allocate_signatured_type_table (objfile
);
4681 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4683 dwo_tu
->dwo_file
= dwo_file
;
4684 dwo_tu
->signature
= signature
;
4685 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4686 dwo_tu
->section
= section
;
4687 dwo_tu
->offset
= offset
;
4688 dwo_tu
->length
= length
;
4692 /* N.B.: type_offset is not usable if this type uses a DWO file.
4693 The real type_offset is in the DWO file. */
4695 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4696 struct signatured_type
);
4697 sig_type
->signature
= signature
;
4698 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4699 sig_type
->per_cu
.objfile
= objfile
;
4700 sig_type
->per_cu
.is_debug_types
= 1;
4701 sig_type
->per_cu
.section
= section
;
4702 sig_type
->per_cu
.offset
= offset
;
4703 sig_type
->per_cu
.length
= length
;
4706 slot
= htab_find_slot (types_htab
,
4707 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4709 gdb_assert (slot
!= NULL
);
4712 sect_offset dup_offset
;
4716 const struct dwo_unit
*dup_tu
= *slot
;
4718 dup_offset
= dup_tu
->offset
;
4722 const struct signatured_type
*dup_tu
= *slot
;
4724 dup_offset
= dup_tu
->per_cu
.offset
;
4727 complaint (&symfile_complaints
,
4728 _("debug type entry at offset 0x%x is duplicate to"
4729 " the entry at offset 0x%x, signature %s"),
4730 offset
.sect_off
, dup_offset
.sect_off
,
4731 hex_string (signature
));
4733 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4735 if (dwarf_read_debug
> 1)
4736 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4738 hex_string (signature
));
4747 /* Create the hash table of all entries in the .debug_types section,
4748 and initialize all_type_units.
4749 The result is zero if there is an error (e.g. missing .debug_types section),
4750 otherwise non-zero. */
4753 create_all_type_units (struct objfile
*objfile
)
4756 struct signatured_type
**iter
;
4758 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4759 if (types_htab
== NULL
)
4761 dwarf2_per_objfile
->signatured_types
= NULL
;
4765 dwarf2_per_objfile
->signatured_types
= types_htab
;
4767 dwarf2_per_objfile
->n_type_units
4768 = dwarf2_per_objfile
->n_allocated_type_units
4769 = htab_elements (types_htab
);
4770 dwarf2_per_objfile
->all_type_units
4771 = xmalloc (dwarf2_per_objfile
->n_type_units
4772 * sizeof (struct signatured_type
*));
4773 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4774 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4775 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4776 == dwarf2_per_objfile
->n_type_units
);
4781 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4782 If SLOT is non-NULL, it is the entry to use in the hash table.
4783 Otherwise we find one. */
4785 static struct signatured_type
*
4786 add_type_unit (ULONGEST sig
, void **slot
)
4788 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4789 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4790 struct signatured_type
*sig_type
;
4792 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4794 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4796 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4797 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4798 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4799 dwarf2_per_objfile
->all_type_units
4800 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4801 dwarf2_per_objfile
->n_allocated_type_units
4802 * sizeof (struct signatured_type
*));
4803 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4805 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4807 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4808 struct signatured_type
);
4809 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4810 sig_type
->signature
= sig
;
4811 sig_type
->per_cu
.is_debug_types
= 1;
4812 if (dwarf2_per_objfile
->using_index
)
4814 sig_type
->per_cu
.v
.quick
=
4815 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4816 struct dwarf2_per_cu_quick_data
);
4821 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4824 gdb_assert (*slot
== NULL
);
4826 /* The rest of sig_type must be filled in by the caller. */
4830 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4831 Fill in SIG_ENTRY with DWO_ENTRY. */
4834 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4835 struct signatured_type
*sig_entry
,
4836 struct dwo_unit
*dwo_entry
)
4838 /* Make sure we're not clobbering something we don't expect to. */
4839 gdb_assert (! sig_entry
->per_cu
.queued
);
4840 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4841 if (dwarf2_per_objfile
->using_index
)
4843 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4844 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4847 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4848 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4849 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4850 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4851 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4853 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4854 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4855 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4856 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4857 sig_entry
->per_cu
.objfile
= objfile
;
4858 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4859 sig_entry
->dwo_unit
= dwo_entry
;
4862 /* Subroutine of lookup_signatured_type.
4863 If we haven't read the TU yet, create the signatured_type data structure
4864 for a TU to be read in directly from a DWO file, bypassing the stub.
4865 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4866 using .gdb_index, then when reading a CU we want to stay in the DWO file
4867 containing that CU. Otherwise we could end up reading several other DWO
4868 files (due to comdat folding) to process the transitive closure of all the
4869 mentioned TUs, and that can be slow. The current DWO file will have every
4870 type signature that it needs.
4871 We only do this for .gdb_index because in the psymtab case we already have
4872 to read all the DWOs to build the type unit groups. */
4874 static struct signatured_type
*
4875 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4877 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4878 struct dwo_file
*dwo_file
;
4879 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4880 struct signatured_type find_sig_entry
, *sig_entry
;
4883 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4885 /* If TU skeletons have been removed then we may not have read in any
4887 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4889 dwarf2_per_objfile
->signatured_types
4890 = allocate_signatured_type_table (objfile
);
4893 /* We only ever need to read in one copy of a signatured type.
4894 Use the global signatured_types array to do our own comdat-folding
4895 of types. If this is the first time we're reading this TU, and
4896 the TU has an entry in .gdb_index, replace the recorded data from
4897 .gdb_index with this TU. */
4899 find_sig_entry
.signature
= sig
;
4900 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4901 &find_sig_entry
, INSERT
);
4904 /* We can get here with the TU already read, *or* in the process of being
4905 read. Don't reassign the global entry to point to this DWO if that's
4906 the case. Also note that if the TU is already being read, it may not
4907 have come from a DWO, the program may be a mix of Fission-compiled
4908 code and non-Fission-compiled code. */
4910 /* Have we already tried to read this TU?
4911 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4912 needn't exist in the global table yet). */
4913 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4916 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4917 dwo_unit of the TU itself. */
4918 dwo_file
= cu
->dwo_unit
->dwo_file
;
4920 /* Ok, this is the first time we're reading this TU. */
4921 if (dwo_file
->tus
== NULL
)
4923 find_dwo_entry
.signature
= sig
;
4924 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4925 if (dwo_entry
== NULL
)
4928 /* If the global table doesn't have an entry for this TU, add one. */
4929 if (sig_entry
== NULL
)
4930 sig_entry
= add_type_unit (sig
, slot
);
4932 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4933 sig_entry
->per_cu
.tu_read
= 1;
4937 /* Subroutine of lookup_signatured_type.
4938 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4939 then try the DWP file. If the TU stub (skeleton) has been removed then
4940 it won't be in .gdb_index. */
4942 static struct signatured_type
*
4943 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4945 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4946 struct dwp_file
*dwp_file
= get_dwp_file ();
4947 struct dwo_unit
*dwo_entry
;
4948 struct signatured_type find_sig_entry
, *sig_entry
;
4951 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4952 gdb_assert (dwp_file
!= NULL
);
4954 /* If TU skeletons have been removed then we may not have read in any
4956 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4958 dwarf2_per_objfile
->signatured_types
4959 = allocate_signatured_type_table (objfile
);
4962 find_sig_entry
.signature
= sig
;
4963 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4964 &find_sig_entry
, INSERT
);
4967 /* Have we already tried to read this TU?
4968 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4969 needn't exist in the global table yet). */
4970 if (sig_entry
!= NULL
)
4973 if (dwp_file
->tus
== NULL
)
4975 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4976 sig
, 1 /* is_debug_types */);
4977 if (dwo_entry
== NULL
)
4980 sig_entry
= add_type_unit (sig
, slot
);
4981 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4986 /* Lookup a signature based type for DW_FORM_ref_sig8.
4987 Returns NULL if signature SIG is not present in the table.
4988 It is up to the caller to complain about this. */
4990 static struct signatured_type
*
4991 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4994 && dwarf2_per_objfile
->using_index
)
4996 /* We're in a DWO/DWP file, and we're using .gdb_index.
4997 These cases require special processing. */
4998 if (get_dwp_file () == NULL
)
4999 return lookup_dwo_signatured_type (cu
, sig
);
5001 return lookup_dwp_signatured_type (cu
, sig
);
5005 struct signatured_type find_entry
, *entry
;
5007 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5009 find_entry
.signature
= sig
;
5010 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
5015 /* Low level DIE reading support. */
5017 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5020 init_cu_die_reader (struct die_reader_specs
*reader
,
5021 struct dwarf2_cu
*cu
,
5022 struct dwarf2_section_info
*section
,
5023 struct dwo_file
*dwo_file
)
5025 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5026 reader
->abfd
= get_section_bfd_owner (section
);
5028 reader
->dwo_file
= dwo_file
;
5029 reader
->die_section
= section
;
5030 reader
->buffer
= section
->buffer
;
5031 reader
->buffer_end
= section
->buffer
+ section
->size
;
5032 reader
->comp_dir
= NULL
;
5035 /* Subroutine of init_cutu_and_read_dies to simplify it.
5036 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5037 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5040 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5041 from it to the DIE in the DWO. If NULL we are skipping the stub.
5042 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5043 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5044 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5045 STUB_COMP_DIR may be non-NULL.
5046 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5047 are filled in with the info of the DIE from the DWO file.
5048 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5049 provided an abbrev table to use.
5050 The result is non-zero if a valid (non-dummy) DIE was found. */
5053 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5054 struct dwo_unit
*dwo_unit
,
5055 int abbrev_table_provided
,
5056 struct die_info
*stub_comp_unit_die
,
5057 const char *stub_comp_dir
,
5058 struct die_reader_specs
*result_reader
,
5059 const gdb_byte
**result_info_ptr
,
5060 struct die_info
**result_comp_unit_die
,
5061 int *result_has_children
)
5063 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5064 struct dwarf2_cu
*cu
= this_cu
->cu
;
5065 struct dwarf2_section_info
*section
;
5067 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5068 ULONGEST signature
; /* Or dwo_id. */
5069 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5070 int i
,num_extra_attrs
;
5071 struct dwarf2_section_info
*dwo_abbrev_section
;
5072 struct attribute
*attr
;
5073 struct die_info
*comp_unit_die
;
5075 /* At most one of these may be provided. */
5076 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5078 /* These attributes aren't processed until later:
5079 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5080 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5081 referenced later. However, these attributes are found in the stub
5082 which we won't have later. In order to not impose this complication
5083 on the rest of the code, we read them here and copy them to the
5092 if (stub_comp_unit_die
!= NULL
)
5094 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5096 if (! this_cu
->is_debug_types
)
5097 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5098 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5099 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5100 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5101 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5103 /* There should be a DW_AT_addr_base attribute here (if needed).
5104 We need the value before we can process DW_FORM_GNU_addr_index. */
5106 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5108 cu
->addr_base
= DW_UNSND (attr
);
5110 /* There should be a DW_AT_ranges_base attribute here (if needed).
5111 We need the value before we can process DW_AT_ranges. */
5112 cu
->ranges_base
= 0;
5113 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5115 cu
->ranges_base
= DW_UNSND (attr
);
5117 else if (stub_comp_dir
!= NULL
)
5119 /* Reconstruct the comp_dir attribute to simplify the code below. */
5120 comp_dir
= (struct attribute
*)
5121 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5122 comp_dir
->name
= DW_AT_comp_dir
;
5123 comp_dir
->form
= DW_FORM_string
;
5124 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5125 DW_STRING (comp_dir
) = stub_comp_dir
;
5128 /* Set up for reading the DWO CU/TU. */
5129 cu
->dwo_unit
= dwo_unit
;
5130 section
= dwo_unit
->section
;
5131 dwarf2_read_section (objfile
, section
);
5132 abfd
= get_section_bfd_owner (section
);
5133 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5134 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5135 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5137 if (this_cu
->is_debug_types
)
5139 ULONGEST header_signature
;
5140 cu_offset type_offset_in_tu
;
5141 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5143 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5147 &type_offset_in_tu
);
5148 /* This is not an assert because it can be caused by bad debug info. */
5149 if (sig_type
->signature
!= header_signature
)
5151 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5152 " TU at offset 0x%x [in module %s]"),
5153 hex_string (sig_type
->signature
),
5154 hex_string (header_signature
),
5155 dwo_unit
->offset
.sect_off
,
5156 bfd_get_filename (abfd
));
5158 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5159 /* For DWOs coming from DWP files, we don't know the CU length
5160 nor the type's offset in the TU until now. */
5161 dwo_unit
->length
= get_cu_length (&cu
->header
);
5162 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5164 /* Establish the type offset that can be used to lookup the type.
5165 For DWO files, we don't know it until now. */
5166 sig_type
->type_offset_in_section
.sect_off
=
5167 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5171 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5174 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5175 /* For DWOs coming from DWP files, we don't know the CU length
5177 dwo_unit
->length
= get_cu_length (&cu
->header
);
5180 /* Replace the CU's original abbrev table with the DWO's.
5181 Reminder: We can't read the abbrev table until we've read the header. */
5182 if (abbrev_table_provided
)
5184 /* Don't free the provided abbrev table, the caller of
5185 init_cutu_and_read_dies owns it. */
5186 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5187 /* Ensure the DWO abbrev table gets freed. */
5188 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5192 dwarf2_free_abbrev_table (cu
);
5193 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5194 /* Leave any existing abbrev table cleanup as is. */
5197 /* Read in the die, but leave space to copy over the attributes
5198 from the stub. This has the benefit of simplifying the rest of
5199 the code - all the work to maintain the illusion of a single
5200 DW_TAG_{compile,type}_unit DIE is done here. */
5201 num_extra_attrs
= ((stmt_list
!= NULL
)
5205 + (comp_dir
!= NULL
));
5206 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5207 result_has_children
, num_extra_attrs
);
5209 /* Copy over the attributes from the stub to the DIE we just read in. */
5210 comp_unit_die
= *result_comp_unit_die
;
5211 i
= comp_unit_die
->num_attrs
;
5212 if (stmt_list
!= NULL
)
5213 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5215 comp_unit_die
->attrs
[i
++] = *low_pc
;
5216 if (high_pc
!= NULL
)
5217 comp_unit_die
->attrs
[i
++] = *high_pc
;
5219 comp_unit_die
->attrs
[i
++] = *ranges
;
5220 if (comp_dir
!= NULL
)
5221 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5222 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5224 if (dwarf_die_debug
)
5226 fprintf_unfiltered (gdb_stdlog
,
5227 "Read die from %s@0x%x of %s:\n",
5228 get_section_name (section
),
5229 (unsigned) (begin_info_ptr
- section
->buffer
),
5230 bfd_get_filename (abfd
));
5231 dump_die (comp_unit_die
, dwarf_die_debug
);
5234 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5235 TUs by skipping the stub and going directly to the entry in the DWO file.
5236 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5237 to get it via circuitous means. Blech. */
5238 if (comp_dir
!= NULL
)
5239 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5241 /* Skip dummy compilation units. */
5242 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5243 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5246 *result_info_ptr
= info_ptr
;
5250 /* Subroutine of init_cutu_and_read_dies to simplify it.
5251 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5252 Returns NULL if the specified DWO unit cannot be found. */
5254 static struct dwo_unit
*
5255 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5256 struct die_info
*comp_unit_die
)
5258 struct dwarf2_cu
*cu
= this_cu
->cu
;
5259 struct attribute
*attr
;
5261 struct dwo_unit
*dwo_unit
;
5262 const char *comp_dir
, *dwo_name
;
5264 gdb_assert (cu
!= NULL
);
5266 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5267 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5268 gdb_assert (attr
!= NULL
);
5269 dwo_name
= DW_STRING (attr
);
5271 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5273 comp_dir
= DW_STRING (attr
);
5275 if (this_cu
->is_debug_types
)
5277 struct signatured_type
*sig_type
;
5279 /* Since this_cu is the first member of struct signatured_type,
5280 we can go from a pointer to one to a pointer to the other. */
5281 sig_type
= (struct signatured_type
*) this_cu
;
5282 signature
= sig_type
->signature
;
5283 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5287 struct attribute
*attr
;
5289 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5291 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5293 dwo_name
, objfile_name (this_cu
->objfile
));
5294 signature
= DW_UNSND (attr
);
5295 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5302 /* Subroutine of init_cutu_and_read_dies to simplify it.
5303 See it for a description of the parameters.
5304 Read a TU directly from a DWO file, bypassing the stub.
5306 Note: This function could be a little bit simpler if we shared cleanups
5307 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5308 to do, so we keep this function self-contained. Or we could move this
5309 into our caller, but it's complex enough already. */
5312 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5313 int use_existing_cu
, int keep
,
5314 die_reader_func_ftype
*die_reader_func
,
5317 struct dwarf2_cu
*cu
;
5318 struct signatured_type
*sig_type
;
5319 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5320 struct die_reader_specs reader
;
5321 const gdb_byte
*info_ptr
;
5322 struct die_info
*comp_unit_die
;
5325 /* Verify we can do the following downcast, and that we have the
5327 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5328 sig_type
= (struct signatured_type
*) this_cu
;
5329 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5331 cleanups
= make_cleanup (null_cleanup
, NULL
);
5333 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5335 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5337 /* There's no need to do the rereading_dwo_cu handling that
5338 init_cutu_and_read_dies does since we don't read the stub. */
5342 /* If !use_existing_cu, this_cu->cu must be NULL. */
5343 gdb_assert (this_cu
->cu
== NULL
);
5344 cu
= xmalloc (sizeof (*cu
));
5345 init_one_comp_unit (cu
, this_cu
);
5346 /* If an error occurs while loading, release our storage. */
5347 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5350 /* A future optimization, if needed, would be to use an existing
5351 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5352 could share abbrev tables. */
5354 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5355 0 /* abbrev_table_provided */,
5356 NULL
/* stub_comp_unit_die */,
5357 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5359 &comp_unit_die
, &has_children
) == 0)
5362 do_cleanups (cleanups
);
5366 /* All the "real" work is done here. */
5367 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5369 /* This duplicates the code in init_cutu_and_read_dies,
5370 but the alternative is making the latter more complex.
5371 This function is only for the special case of using DWO files directly:
5372 no point in overly complicating the general case just to handle this. */
5373 if (free_cu_cleanup
!= NULL
)
5377 /* We've successfully allocated this compilation unit. Let our
5378 caller clean it up when finished with it. */
5379 discard_cleanups (free_cu_cleanup
);
5381 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5382 So we have to manually free the abbrev table. */
5383 dwarf2_free_abbrev_table (cu
);
5385 /* Link this CU into read_in_chain. */
5386 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5387 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5390 do_cleanups (free_cu_cleanup
);
5393 do_cleanups (cleanups
);
5396 /* Initialize a CU (or TU) and read its DIEs.
5397 If the CU defers to a DWO file, read the DWO file as well.
5399 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5400 Otherwise the table specified in the comp unit header is read in and used.
5401 This is an optimization for when we already have the abbrev table.
5403 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5404 Otherwise, a new CU is allocated with xmalloc.
5406 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5407 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5409 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5410 linker) then DIE_READER_FUNC will not get called. */
5413 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5414 struct abbrev_table
*abbrev_table
,
5415 int use_existing_cu
, int keep
,
5416 die_reader_func_ftype
*die_reader_func
,
5419 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5420 struct dwarf2_section_info
*section
= this_cu
->section
;
5421 bfd
*abfd
= get_section_bfd_owner (section
);
5422 struct dwarf2_cu
*cu
;
5423 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5424 struct die_reader_specs reader
;
5425 struct die_info
*comp_unit_die
;
5427 struct attribute
*attr
;
5428 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5429 struct signatured_type
*sig_type
= NULL
;
5430 struct dwarf2_section_info
*abbrev_section
;
5431 /* Non-zero if CU currently points to a DWO file and we need to
5432 reread it. When this happens we need to reread the skeleton die
5433 before we can reread the DWO file (this only applies to CUs, not TUs). */
5434 int rereading_dwo_cu
= 0;
5436 if (dwarf_die_debug
)
5437 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5438 this_cu
->is_debug_types
? "type" : "comp",
5439 this_cu
->offset
.sect_off
);
5441 if (use_existing_cu
)
5444 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5445 file (instead of going through the stub), short-circuit all of this. */
5446 if (this_cu
->reading_dwo_directly
)
5448 /* Narrow down the scope of possibilities to have to understand. */
5449 gdb_assert (this_cu
->is_debug_types
);
5450 gdb_assert (abbrev_table
== NULL
);
5451 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5452 die_reader_func
, data
);
5456 cleanups
= make_cleanup (null_cleanup
, NULL
);
5458 /* This is cheap if the section is already read in. */
5459 dwarf2_read_section (objfile
, section
);
5461 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5463 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5465 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5468 /* If this CU is from a DWO file we need to start over, we need to
5469 refetch the attributes from the skeleton CU.
5470 This could be optimized by retrieving those attributes from when we
5471 were here the first time: the previous comp_unit_die was stored in
5472 comp_unit_obstack. But there's no data yet that we need this
5474 if (cu
->dwo_unit
!= NULL
)
5475 rereading_dwo_cu
= 1;
5479 /* If !use_existing_cu, this_cu->cu must be NULL. */
5480 gdb_assert (this_cu
->cu
== NULL
);
5481 cu
= xmalloc (sizeof (*cu
));
5482 init_one_comp_unit (cu
, this_cu
);
5483 /* If an error occurs while loading, release our storage. */
5484 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5487 /* Get the header. */
5488 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5490 /* We already have the header, there's no need to read it in again. */
5491 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5495 if (this_cu
->is_debug_types
)
5498 cu_offset type_offset_in_tu
;
5500 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5501 abbrev_section
, info_ptr
,
5503 &type_offset_in_tu
);
5505 /* Since per_cu is the first member of struct signatured_type,
5506 we can go from a pointer to one to a pointer to the other. */
5507 sig_type
= (struct signatured_type
*) this_cu
;
5508 gdb_assert (sig_type
->signature
== signature
);
5509 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5510 == type_offset_in_tu
.cu_off
);
5511 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5513 /* LENGTH has not been set yet for type units if we're
5514 using .gdb_index. */
5515 this_cu
->length
= get_cu_length (&cu
->header
);
5517 /* Establish the type offset that can be used to lookup the type. */
5518 sig_type
->type_offset_in_section
.sect_off
=
5519 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5523 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5527 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5528 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5532 /* Skip dummy compilation units. */
5533 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5534 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5536 do_cleanups (cleanups
);
5540 /* If we don't have them yet, read the abbrevs for this compilation unit.
5541 And if we need to read them now, make sure they're freed when we're
5542 done. Note that it's important that if the CU had an abbrev table
5543 on entry we don't free it when we're done: Somewhere up the call stack
5544 it may be in use. */
5545 if (abbrev_table
!= NULL
)
5547 gdb_assert (cu
->abbrev_table
== NULL
);
5548 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5549 == abbrev_table
->offset
.sect_off
);
5550 cu
->abbrev_table
= abbrev_table
;
5552 else if (cu
->abbrev_table
== NULL
)
5554 dwarf2_read_abbrevs (cu
, abbrev_section
);
5555 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5557 else if (rereading_dwo_cu
)
5559 dwarf2_free_abbrev_table (cu
);
5560 dwarf2_read_abbrevs (cu
, abbrev_section
);
5563 /* Read the top level CU/TU die. */
5564 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5565 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5567 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5569 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5570 DWO CU, that this test will fail (the attribute will not be present). */
5571 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5574 struct dwo_unit
*dwo_unit
;
5575 struct die_info
*dwo_comp_unit_die
;
5579 complaint (&symfile_complaints
,
5580 _("compilation unit with DW_AT_GNU_dwo_name"
5581 " has children (offset 0x%x) [in module %s]"),
5582 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5584 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5585 if (dwo_unit
!= NULL
)
5587 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5588 abbrev_table
!= NULL
,
5589 comp_unit_die
, NULL
,
5591 &dwo_comp_unit_die
, &has_children
) == 0)
5594 do_cleanups (cleanups
);
5597 comp_unit_die
= dwo_comp_unit_die
;
5601 /* Yikes, we couldn't find the rest of the DIE, we only have
5602 the stub. A complaint has already been logged. There's
5603 not much more we can do except pass on the stub DIE to
5604 die_reader_func. We don't want to throw an error on bad
5609 /* All of the above is setup for this call. Yikes. */
5610 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5612 /* Done, clean up. */
5613 if (free_cu_cleanup
!= NULL
)
5617 /* We've successfully allocated this compilation unit. Let our
5618 caller clean it up when finished with it. */
5619 discard_cleanups (free_cu_cleanup
);
5621 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5622 So we have to manually free the abbrev table. */
5623 dwarf2_free_abbrev_table (cu
);
5625 /* Link this CU into read_in_chain. */
5626 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5627 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5630 do_cleanups (free_cu_cleanup
);
5633 do_cleanups (cleanups
);
5636 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5637 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5638 to have already done the lookup to find the DWO file).
5640 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5641 THIS_CU->is_debug_types, but nothing else.
5643 We fill in THIS_CU->length.
5645 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5646 linker) then DIE_READER_FUNC will not get called.
5648 THIS_CU->cu is always freed when done.
5649 This is done in order to not leave THIS_CU->cu in a state where we have
5650 to care whether it refers to the "main" CU or the DWO CU. */
5653 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5654 struct dwo_file
*dwo_file
,
5655 die_reader_func_ftype
*die_reader_func
,
5658 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5659 struct dwarf2_section_info
*section
= this_cu
->section
;
5660 bfd
*abfd
= get_section_bfd_owner (section
);
5661 struct dwarf2_section_info
*abbrev_section
;
5662 struct dwarf2_cu cu
;
5663 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5664 struct die_reader_specs reader
;
5665 struct cleanup
*cleanups
;
5666 struct die_info
*comp_unit_die
;
5669 if (dwarf_die_debug
)
5670 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5671 this_cu
->is_debug_types
? "type" : "comp",
5672 this_cu
->offset
.sect_off
);
5674 gdb_assert (this_cu
->cu
== NULL
);
5676 abbrev_section
= (dwo_file
!= NULL
5677 ? &dwo_file
->sections
.abbrev
5678 : get_abbrev_section_for_cu (this_cu
));
5680 /* This is cheap if the section is already read in. */
5681 dwarf2_read_section (objfile
, section
);
5683 init_one_comp_unit (&cu
, this_cu
);
5685 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5687 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5688 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5689 abbrev_section
, info_ptr
,
5690 this_cu
->is_debug_types
);
5692 this_cu
->length
= get_cu_length (&cu
.header
);
5694 /* Skip dummy compilation units. */
5695 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5696 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5698 do_cleanups (cleanups
);
5702 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5703 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5705 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5706 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5708 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5710 do_cleanups (cleanups
);
5713 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5714 does not lookup the specified DWO file.
5715 This cannot be used to read DWO files.
5717 THIS_CU->cu is always freed when done.
5718 This is done in order to not leave THIS_CU->cu in a state where we have
5719 to care whether it refers to the "main" CU or the DWO CU.
5720 We can revisit this if the data shows there's a performance issue. */
5723 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5724 die_reader_func_ftype
*die_reader_func
,
5727 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5730 /* Type Unit Groups.
5732 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5733 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5734 so that all types coming from the same compilation (.o file) are grouped
5735 together. A future step could be to put the types in the same symtab as
5736 the CU the types ultimately came from. */
5739 hash_type_unit_group (const void *item
)
5741 const struct type_unit_group
*tu_group
= item
;
5743 return hash_stmt_list_entry (&tu_group
->hash
);
5747 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5749 const struct type_unit_group
*lhs
= item_lhs
;
5750 const struct type_unit_group
*rhs
= item_rhs
;
5752 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5755 /* Allocate a hash table for type unit groups. */
5758 allocate_type_unit_groups_table (void)
5760 return htab_create_alloc_ex (3,
5761 hash_type_unit_group
,
5764 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5765 hashtab_obstack_allocate
,
5766 dummy_obstack_deallocate
);
5769 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5770 partial symtabs. We combine several TUs per psymtab to not let the size
5771 of any one psymtab grow too big. */
5772 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5773 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5775 /* Helper routine for get_type_unit_group.
5776 Create the type_unit_group object used to hold one or more TUs. */
5778 static struct type_unit_group
*
5779 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5781 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5782 struct dwarf2_per_cu_data
*per_cu
;
5783 struct type_unit_group
*tu_group
;
5785 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5786 struct type_unit_group
);
5787 per_cu
= &tu_group
->per_cu
;
5788 per_cu
->objfile
= objfile
;
5790 if (dwarf2_per_objfile
->using_index
)
5792 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5793 struct dwarf2_per_cu_quick_data
);
5797 unsigned int line_offset
= line_offset_struct
.sect_off
;
5798 struct partial_symtab
*pst
;
5801 /* Give the symtab a useful name for debug purposes. */
5802 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5803 name
= xstrprintf ("<type_units_%d>",
5804 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5806 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5808 pst
= create_partial_symtab (per_cu
, name
);
5814 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5815 tu_group
->hash
.line_offset
= line_offset_struct
;
5820 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5821 STMT_LIST is a DW_AT_stmt_list attribute. */
5823 static struct type_unit_group
*
5824 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5826 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5827 struct type_unit_group
*tu_group
;
5829 unsigned int line_offset
;
5830 struct type_unit_group type_unit_group_for_lookup
;
5832 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5834 dwarf2_per_objfile
->type_unit_groups
=
5835 allocate_type_unit_groups_table ();
5838 /* Do we need to create a new group, or can we use an existing one? */
5842 line_offset
= DW_UNSND (stmt_list
);
5843 ++tu_stats
->nr_symtab_sharers
;
5847 /* Ugh, no stmt_list. Rare, but we have to handle it.
5848 We can do various things here like create one group per TU or
5849 spread them over multiple groups to split up the expansion work.
5850 To avoid worst case scenarios (too many groups or too large groups)
5851 we, umm, group them in bunches. */
5852 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5853 | (tu_stats
->nr_stmt_less_type_units
5854 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5855 ++tu_stats
->nr_stmt_less_type_units
;
5858 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5859 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5860 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5861 &type_unit_group_for_lookup
, INSERT
);
5865 gdb_assert (tu_group
!= NULL
);
5869 sect_offset line_offset_struct
;
5871 line_offset_struct
.sect_off
= line_offset
;
5872 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5874 ++tu_stats
->nr_symtabs
;
5880 /* Partial symbol tables. */
5882 /* Create a psymtab named NAME and assign it to PER_CU.
5884 The caller must fill in the following details:
5885 dirname, textlow, texthigh. */
5887 static struct partial_symtab
*
5888 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5890 struct objfile
*objfile
= per_cu
->objfile
;
5891 struct partial_symtab
*pst
;
5893 pst
= start_psymtab_common (objfile
, name
, 0,
5894 objfile
->global_psymbols
.next
,
5895 objfile
->static_psymbols
.next
);
5897 pst
->psymtabs_addrmap_supported
= 1;
5899 /* This is the glue that links PST into GDB's symbol API. */
5900 pst
->read_symtab_private
= per_cu
;
5901 pst
->read_symtab
= dwarf2_read_symtab
;
5902 per_cu
->v
.psymtab
= pst
;
5907 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5910 struct process_psymtab_comp_unit_data
5912 /* True if we are reading a DW_TAG_partial_unit. */
5914 int want_partial_unit
;
5916 /* The "pretend" language that is used if the CU doesn't declare a
5919 enum language pretend_language
;
5922 /* die_reader_func for process_psymtab_comp_unit. */
5925 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5926 const gdb_byte
*info_ptr
,
5927 struct die_info
*comp_unit_die
,
5931 struct dwarf2_cu
*cu
= reader
->cu
;
5932 struct objfile
*objfile
= cu
->objfile
;
5933 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5934 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5935 struct attribute
*attr
;
5937 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5938 struct partial_symtab
*pst
;
5940 const char *filename
;
5941 struct process_psymtab_comp_unit_data
*info
= data
;
5943 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5946 gdb_assert (! per_cu
->is_debug_types
);
5948 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5950 cu
->list_in_scope
= &file_symbols
;
5952 /* Allocate a new partial symbol table structure. */
5953 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5954 if (attr
== NULL
|| !DW_STRING (attr
))
5957 filename
= DW_STRING (attr
);
5959 pst
= create_partial_symtab (per_cu
, filename
);
5961 /* This must be done before calling dwarf2_build_include_psymtabs. */
5962 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5964 pst
->dirname
= DW_STRING (attr
);
5966 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5968 dwarf2_find_base_address (comp_unit_die
, cu
);
5970 /* Possibly set the default values of LOWPC and HIGHPC from
5972 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5973 &best_highpc
, cu
, pst
);
5974 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5975 /* Store the contiguous range if it is not empty; it can be empty for
5976 CUs with no code. */
5977 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5978 gdbarch_adjust_dwarf2_addr (gdbarch
,
5979 best_lowpc
+ baseaddr
),
5980 gdbarch_adjust_dwarf2_addr (gdbarch
,
5981 best_highpc
+ baseaddr
) - 1,
5984 /* Check if comp unit has_children.
5985 If so, read the rest of the partial symbols from this comp unit.
5986 If not, there's no more debug_info for this comp unit. */
5989 struct partial_die_info
*first_die
;
5990 CORE_ADDR lowpc
, highpc
;
5992 lowpc
= ((CORE_ADDR
) -1);
5993 highpc
= ((CORE_ADDR
) 0);
5995 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5997 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6000 /* If we didn't find a lowpc, set it to highpc to avoid
6001 complaints from `maint check'. */
6002 if (lowpc
== ((CORE_ADDR
) -1))
6005 /* If the compilation unit didn't have an explicit address range,
6006 then use the information extracted from its child dies. */
6010 best_highpc
= highpc
;
6013 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6014 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6016 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6017 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6018 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6019 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6020 sort_pst_symbols (objfile
, pst
);
6022 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6025 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6026 struct dwarf2_per_cu_data
*iter
;
6028 /* Fill in 'dependencies' here; we fill in 'users' in a
6030 pst
->number_of_dependencies
= len
;
6031 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6032 len
* sizeof (struct symtab
*));
6034 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6037 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6039 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6042 /* Get the list of files included in the current compilation unit,
6043 and build a psymtab for each of them. */
6044 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6046 if (dwarf_read_debug
)
6048 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6050 fprintf_unfiltered (gdb_stdlog
,
6051 "Psymtab for %s unit @0x%x: %s - %s"
6052 ", %d global, %d static syms\n",
6053 per_cu
->is_debug_types
? "type" : "comp",
6054 per_cu
->offset
.sect_off
,
6055 paddress (gdbarch
, pst
->textlow
),
6056 paddress (gdbarch
, pst
->texthigh
),
6057 pst
->n_global_syms
, pst
->n_static_syms
);
6061 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6062 Process compilation unit THIS_CU for a psymtab. */
6065 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6066 int want_partial_unit
,
6067 enum language pretend_language
)
6069 struct process_psymtab_comp_unit_data info
;
6071 /* If this compilation unit was already read in, free the
6072 cached copy in order to read it in again. This is
6073 necessary because we skipped some symbols when we first
6074 read in the compilation unit (see load_partial_dies).
6075 This problem could be avoided, but the benefit is unclear. */
6076 if (this_cu
->cu
!= NULL
)
6077 free_one_cached_comp_unit (this_cu
);
6079 gdb_assert (! this_cu
->is_debug_types
);
6080 info
.want_partial_unit
= want_partial_unit
;
6081 info
.pretend_language
= pretend_language
;
6082 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6083 process_psymtab_comp_unit_reader
,
6086 /* Age out any secondary CUs. */
6087 age_cached_comp_units ();
6090 /* Reader function for build_type_psymtabs. */
6093 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6094 const gdb_byte
*info_ptr
,
6095 struct die_info
*type_unit_die
,
6099 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6100 struct dwarf2_cu
*cu
= reader
->cu
;
6101 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6102 struct signatured_type
*sig_type
;
6103 struct type_unit_group
*tu_group
;
6104 struct attribute
*attr
;
6105 struct partial_die_info
*first_die
;
6106 CORE_ADDR lowpc
, highpc
;
6107 struct partial_symtab
*pst
;
6109 gdb_assert (data
== NULL
);
6110 gdb_assert (per_cu
->is_debug_types
);
6111 sig_type
= (struct signatured_type
*) per_cu
;
6116 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6117 tu_group
= get_type_unit_group (cu
, attr
);
6119 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6121 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6122 cu
->list_in_scope
= &file_symbols
;
6123 pst
= create_partial_symtab (per_cu
, "");
6126 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6128 lowpc
= (CORE_ADDR
) -1;
6129 highpc
= (CORE_ADDR
) 0;
6130 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6132 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6133 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6134 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6135 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6136 sort_pst_symbols (objfile
, pst
);
6139 /* Struct used to sort TUs by their abbreviation table offset. */
6141 struct tu_abbrev_offset
6143 struct signatured_type
*sig_type
;
6144 sect_offset abbrev_offset
;
6147 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6150 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6152 const struct tu_abbrev_offset
* const *a
= ap
;
6153 const struct tu_abbrev_offset
* const *b
= bp
;
6154 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6155 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6157 return (aoff
> boff
) - (aoff
< boff
);
6160 /* Efficiently read all the type units.
6161 This does the bulk of the work for build_type_psymtabs.
6163 The efficiency is because we sort TUs by the abbrev table they use and
6164 only read each abbrev table once. In one program there are 200K TUs
6165 sharing 8K abbrev tables.
6167 The main purpose of this function is to support building the
6168 dwarf2_per_objfile->type_unit_groups table.
6169 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6170 can collapse the search space by grouping them by stmt_list.
6171 The savings can be significant, in the same program from above the 200K TUs
6172 share 8K stmt_list tables.
6174 FUNC is expected to call get_type_unit_group, which will create the
6175 struct type_unit_group if necessary and add it to
6176 dwarf2_per_objfile->type_unit_groups. */
6179 build_type_psymtabs_1 (void)
6181 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6182 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6183 struct cleanup
*cleanups
;
6184 struct abbrev_table
*abbrev_table
;
6185 sect_offset abbrev_offset
;
6186 struct tu_abbrev_offset
*sorted_by_abbrev
;
6187 struct type_unit_group
**iter
;
6190 /* It's up to the caller to not call us multiple times. */
6191 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6193 if (dwarf2_per_objfile
->n_type_units
== 0)
6196 /* TUs typically share abbrev tables, and there can be way more TUs than
6197 abbrev tables. Sort by abbrev table to reduce the number of times we
6198 read each abbrev table in.
6199 Alternatives are to punt or to maintain a cache of abbrev tables.
6200 This is simpler and efficient enough for now.
6202 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6203 symtab to use). Typically TUs with the same abbrev offset have the same
6204 stmt_list value too so in practice this should work well.
6206 The basic algorithm here is:
6208 sort TUs by abbrev table
6209 for each TU with same abbrev table:
6210 read abbrev table if first user
6211 read TU top level DIE
6212 [IWBN if DWO skeletons had DW_AT_stmt_list]
6215 if (dwarf_read_debug
)
6216 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6218 /* Sort in a separate table to maintain the order of all_type_units
6219 for .gdb_index: TU indices directly index all_type_units. */
6220 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6221 dwarf2_per_objfile
->n_type_units
);
6222 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6224 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6226 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6227 sorted_by_abbrev
[i
].abbrev_offset
=
6228 read_abbrev_offset (sig_type
->per_cu
.section
,
6229 sig_type
->per_cu
.offset
);
6231 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6232 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6233 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6235 abbrev_offset
.sect_off
= ~(unsigned) 0;
6236 abbrev_table
= NULL
;
6237 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6239 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6241 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6243 /* Switch to the next abbrev table if necessary. */
6244 if (abbrev_table
== NULL
6245 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6247 if (abbrev_table
!= NULL
)
6249 abbrev_table_free (abbrev_table
);
6250 /* Reset to NULL in case abbrev_table_read_table throws
6251 an error: abbrev_table_free_cleanup will get called. */
6252 abbrev_table
= NULL
;
6254 abbrev_offset
= tu
->abbrev_offset
;
6256 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6258 ++tu_stats
->nr_uniq_abbrev_tables
;
6261 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6262 build_type_psymtabs_reader
, NULL
);
6265 do_cleanups (cleanups
);
6268 /* Print collected type unit statistics. */
6271 print_tu_stats (void)
6273 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6275 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6276 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6277 dwarf2_per_objfile
->n_type_units
);
6278 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6279 tu_stats
->nr_uniq_abbrev_tables
);
6280 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6281 tu_stats
->nr_symtabs
);
6282 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6283 tu_stats
->nr_symtab_sharers
);
6284 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6285 tu_stats
->nr_stmt_less_type_units
);
6286 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6287 tu_stats
->nr_all_type_units_reallocs
);
6290 /* Traversal function for build_type_psymtabs. */
6293 build_type_psymtab_dependencies (void **slot
, void *info
)
6295 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6296 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6297 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6298 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6299 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6300 struct signatured_type
*iter
;
6303 gdb_assert (len
> 0);
6304 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6306 pst
->number_of_dependencies
= len
;
6307 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6308 len
* sizeof (struct psymtab
*));
6310 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6313 gdb_assert (iter
->per_cu
.is_debug_types
);
6314 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6315 iter
->type_unit_group
= tu_group
;
6318 VEC_free (sig_type_ptr
, tu_group
->tus
);
6323 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6324 Build partial symbol tables for the .debug_types comp-units. */
6327 build_type_psymtabs (struct objfile
*objfile
)
6329 if (! create_all_type_units (objfile
))
6332 build_type_psymtabs_1 ();
6335 /* Traversal function for process_skeletonless_type_unit.
6336 Read a TU in a DWO file and build partial symbols for it. */
6339 process_skeletonless_type_unit (void **slot
, void *info
)
6341 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6342 struct objfile
*objfile
= info
;
6343 struct signatured_type find_entry
, *entry
;
6345 /* If this TU doesn't exist in the global table, add it and read it in. */
6347 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6349 dwarf2_per_objfile
->signatured_types
6350 = allocate_signatured_type_table (objfile
);
6353 find_entry
.signature
= dwo_unit
->signature
;
6354 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6356 /* If we've already seen this type there's nothing to do. What's happening
6357 is we're doing our own version of comdat-folding here. */
6361 /* This does the job that create_all_type_units would have done for
6363 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6364 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6367 /* This does the job that build_type_psymtabs_1 would have done. */
6368 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6369 build_type_psymtabs_reader
, NULL
);
6374 /* Traversal function for process_skeletonless_type_units. */
6377 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6379 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6381 if (dwo_file
->tus
!= NULL
)
6383 htab_traverse_noresize (dwo_file
->tus
,
6384 process_skeletonless_type_unit
, info
);
6390 /* Scan all TUs of DWO files, verifying we've processed them.
6391 This is needed in case a TU was emitted without its skeleton.
6392 Note: This can't be done until we know what all the DWO files are. */
6395 process_skeletonless_type_units (struct objfile
*objfile
)
6397 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6398 if (get_dwp_file () == NULL
6399 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6401 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6402 process_dwo_file_for_skeletonless_type_units
,
6407 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6410 psymtabs_addrmap_cleanup (void *o
)
6412 struct objfile
*objfile
= o
;
6414 objfile
->psymtabs_addrmap
= NULL
;
6417 /* Compute the 'user' field for each psymtab in OBJFILE. */
6420 set_partial_user (struct objfile
*objfile
)
6424 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6426 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6427 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6433 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6435 /* Set the 'user' field only if it is not already set. */
6436 if (pst
->dependencies
[j
]->user
== NULL
)
6437 pst
->dependencies
[j
]->user
= pst
;
6442 /* Build the partial symbol table by doing a quick pass through the
6443 .debug_info and .debug_abbrev sections. */
6446 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6448 struct cleanup
*back_to
, *addrmap_cleanup
;
6449 struct obstack temp_obstack
;
6452 if (dwarf_read_debug
)
6454 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6455 objfile_name (objfile
));
6458 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6460 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6462 /* Any cached compilation units will be linked by the per-objfile
6463 read_in_chain. Make sure to free them when we're done. */
6464 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6466 build_type_psymtabs (objfile
);
6468 create_all_comp_units (objfile
);
6470 /* Create a temporary address map on a temporary obstack. We later
6471 copy this to the final obstack. */
6472 obstack_init (&temp_obstack
);
6473 make_cleanup_obstack_free (&temp_obstack
);
6474 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6475 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6477 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6479 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6481 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6484 /* This has to wait until we read the CUs, we need the list of DWOs. */
6485 process_skeletonless_type_units (objfile
);
6487 /* Now that all TUs have been processed we can fill in the dependencies. */
6488 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6490 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6491 build_type_psymtab_dependencies
, NULL
);
6494 if (dwarf_read_debug
)
6497 set_partial_user (objfile
);
6499 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6500 &objfile
->objfile_obstack
);
6501 discard_cleanups (addrmap_cleanup
);
6503 do_cleanups (back_to
);
6505 if (dwarf_read_debug
)
6506 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6507 objfile_name (objfile
));
6510 /* die_reader_func for load_partial_comp_unit. */
6513 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6514 const gdb_byte
*info_ptr
,
6515 struct die_info
*comp_unit_die
,
6519 struct dwarf2_cu
*cu
= reader
->cu
;
6521 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6523 /* Check if comp unit has_children.
6524 If so, read the rest of the partial symbols from this comp unit.
6525 If not, there's no more debug_info for this comp unit. */
6527 load_partial_dies (reader
, info_ptr
, 0);
6530 /* Load the partial DIEs for a secondary CU into memory.
6531 This is also used when rereading a primary CU with load_all_dies. */
6534 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6536 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6537 load_partial_comp_unit_reader
, NULL
);
6541 read_comp_units_from_section (struct objfile
*objfile
,
6542 struct dwarf2_section_info
*section
,
6543 unsigned int is_dwz
,
6546 struct dwarf2_per_cu_data
***all_comp_units
)
6548 const gdb_byte
*info_ptr
;
6549 bfd
*abfd
= get_section_bfd_owner (section
);
6551 if (dwarf_read_debug
)
6552 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6553 get_section_name (section
),
6554 get_section_file_name (section
));
6556 dwarf2_read_section (objfile
, section
);
6558 info_ptr
= section
->buffer
;
6560 while (info_ptr
< section
->buffer
+ section
->size
)
6562 unsigned int length
, initial_length_size
;
6563 struct dwarf2_per_cu_data
*this_cu
;
6566 offset
.sect_off
= info_ptr
- section
->buffer
;
6568 /* Read just enough information to find out where the next
6569 compilation unit is. */
6570 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6572 /* Save the compilation unit for later lookup. */
6573 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6574 sizeof (struct dwarf2_per_cu_data
));
6575 memset (this_cu
, 0, sizeof (*this_cu
));
6576 this_cu
->offset
= offset
;
6577 this_cu
->length
= length
+ initial_length_size
;
6578 this_cu
->is_dwz
= is_dwz
;
6579 this_cu
->objfile
= objfile
;
6580 this_cu
->section
= section
;
6582 if (*n_comp_units
== *n_allocated
)
6585 *all_comp_units
= xrealloc (*all_comp_units
,
6587 * sizeof (struct dwarf2_per_cu_data
*));
6589 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6592 info_ptr
= info_ptr
+ this_cu
->length
;
6596 /* Create a list of all compilation units in OBJFILE.
6597 This is only done for -readnow and building partial symtabs. */
6600 create_all_comp_units (struct objfile
*objfile
)
6604 struct dwarf2_per_cu_data
**all_comp_units
;
6605 struct dwz_file
*dwz
;
6609 all_comp_units
= xmalloc (n_allocated
6610 * sizeof (struct dwarf2_per_cu_data
*));
6612 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6613 &n_allocated
, &n_comp_units
, &all_comp_units
);
6615 dwz
= dwarf2_get_dwz_file ();
6617 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6618 &n_allocated
, &n_comp_units
,
6621 dwarf2_per_objfile
->all_comp_units
6622 = obstack_alloc (&objfile
->objfile_obstack
,
6623 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6624 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6625 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6626 xfree (all_comp_units
);
6627 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6630 /* Process all loaded DIEs for compilation unit CU, starting at
6631 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6632 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6633 DW_AT_ranges). See the comments of add_partial_subprogram on how
6634 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6637 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6638 CORE_ADDR
*highpc
, int set_addrmap
,
6639 struct dwarf2_cu
*cu
)
6641 struct partial_die_info
*pdi
;
6643 /* Now, march along the PDI's, descending into ones which have
6644 interesting children but skipping the children of the other ones,
6645 until we reach the end of the compilation unit. */
6651 fixup_partial_die (pdi
, cu
);
6653 /* Anonymous namespaces or modules have no name but have interesting
6654 children, so we need to look at them. Ditto for anonymous
6657 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6658 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6659 || pdi
->tag
== DW_TAG_imported_unit
)
6663 case DW_TAG_subprogram
:
6664 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6666 case DW_TAG_constant
:
6667 case DW_TAG_variable
:
6668 case DW_TAG_typedef
:
6669 case DW_TAG_union_type
:
6670 if (!pdi
->is_declaration
)
6672 add_partial_symbol (pdi
, cu
);
6675 case DW_TAG_class_type
:
6676 case DW_TAG_interface_type
:
6677 case DW_TAG_structure_type
:
6678 if (!pdi
->is_declaration
)
6680 add_partial_symbol (pdi
, cu
);
6683 case DW_TAG_enumeration_type
:
6684 if (!pdi
->is_declaration
)
6685 add_partial_enumeration (pdi
, cu
);
6687 case DW_TAG_base_type
:
6688 case DW_TAG_subrange_type
:
6689 /* File scope base type definitions are added to the partial
6691 add_partial_symbol (pdi
, cu
);
6693 case DW_TAG_namespace
:
6694 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6697 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6699 case DW_TAG_imported_unit
:
6701 struct dwarf2_per_cu_data
*per_cu
;
6703 /* For now we don't handle imported units in type units. */
6704 if (cu
->per_cu
->is_debug_types
)
6706 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6707 " supported in type units [in module %s]"),
6708 objfile_name (cu
->objfile
));
6711 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6715 /* Go read the partial unit, if needed. */
6716 if (per_cu
->v
.psymtab
== NULL
)
6717 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6719 VEC_safe_push (dwarf2_per_cu_ptr
,
6720 cu
->per_cu
->imported_symtabs
, per_cu
);
6723 case DW_TAG_imported_declaration
:
6724 add_partial_symbol (pdi
, cu
);
6731 /* If the die has a sibling, skip to the sibling. */
6733 pdi
= pdi
->die_sibling
;
6737 /* Functions used to compute the fully scoped name of a partial DIE.
6739 Normally, this is simple. For C++, the parent DIE's fully scoped
6740 name is concatenated with "::" and the partial DIE's name. For
6741 Java, the same thing occurs except that "." is used instead of "::".
6742 Enumerators are an exception; they use the scope of their parent
6743 enumeration type, i.e. the name of the enumeration type is not
6744 prepended to the enumerator.
6746 There are two complexities. One is DW_AT_specification; in this
6747 case "parent" means the parent of the target of the specification,
6748 instead of the direct parent of the DIE. The other is compilers
6749 which do not emit DW_TAG_namespace; in this case we try to guess
6750 the fully qualified name of structure types from their members'
6751 linkage names. This must be done using the DIE's children rather
6752 than the children of any DW_AT_specification target. We only need
6753 to do this for structures at the top level, i.e. if the target of
6754 any DW_AT_specification (if any; otherwise the DIE itself) does not
6757 /* Compute the scope prefix associated with PDI's parent, in
6758 compilation unit CU. The result will be allocated on CU's
6759 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6760 field. NULL is returned if no prefix is necessary. */
6762 partial_die_parent_scope (struct partial_die_info
*pdi
,
6763 struct dwarf2_cu
*cu
)
6765 const char *grandparent_scope
;
6766 struct partial_die_info
*parent
, *real_pdi
;
6768 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6769 then this means the parent of the specification DIE. */
6772 while (real_pdi
->has_specification
)
6773 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6774 real_pdi
->spec_is_dwz
, cu
);
6776 parent
= real_pdi
->die_parent
;
6780 if (parent
->scope_set
)
6781 return parent
->scope
;
6783 fixup_partial_die (parent
, cu
);
6785 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6787 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6788 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6789 Work around this problem here. */
6790 if (cu
->language
== language_cplus
6791 && parent
->tag
== DW_TAG_namespace
6792 && strcmp (parent
->name
, "::") == 0
6793 && grandparent_scope
== NULL
)
6795 parent
->scope
= NULL
;
6796 parent
->scope_set
= 1;
6800 if (pdi
->tag
== DW_TAG_enumerator
)
6801 /* Enumerators should not get the name of the enumeration as a prefix. */
6802 parent
->scope
= grandparent_scope
;
6803 else if (parent
->tag
== DW_TAG_namespace
6804 || parent
->tag
== DW_TAG_module
6805 || parent
->tag
== DW_TAG_structure_type
6806 || parent
->tag
== DW_TAG_class_type
6807 || parent
->tag
== DW_TAG_interface_type
6808 || parent
->tag
== DW_TAG_union_type
6809 || parent
->tag
== DW_TAG_enumeration_type
)
6811 if (grandparent_scope
== NULL
)
6812 parent
->scope
= parent
->name
;
6814 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6816 parent
->name
, 0, cu
);
6820 /* FIXME drow/2004-04-01: What should we be doing with
6821 function-local names? For partial symbols, we should probably be
6823 complaint (&symfile_complaints
,
6824 _("unhandled containing DIE tag %d for DIE at %d"),
6825 parent
->tag
, pdi
->offset
.sect_off
);
6826 parent
->scope
= grandparent_scope
;
6829 parent
->scope_set
= 1;
6830 return parent
->scope
;
6833 /* Return the fully scoped name associated with PDI, from compilation unit
6834 CU. The result will be allocated with malloc. */
6837 partial_die_full_name (struct partial_die_info
*pdi
,
6838 struct dwarf2_cu
*cu
)
6840 const char *parent_scope
;
6842 /* If this is a template instantiation, we can not work out the
6843 template arguments from partial DIEs. So, unfortunately, we have
6844 to go through the full DIEs. At least any work we do building
6845 types here will be reused if full symbols are loaded later. */
6846 if (pdi
->has_template_arguments
)
6848 fixup_partial_die (pdi
, cu
);
6850 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6852 struct die_info
*die
;
6853 struct attribute attr
;
6854 struct dwarf2_cu
*ref_cu
= cu
;
6856 /* DW_FORM_ref_addr is using section offset. */
6858 attr
.form
= DW_FORM_ref_addr
;
6859 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6860 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6862 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6866 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6867 if (parent_scope
== NULL
)
6870 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6874 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6876 struct objfile
*objfile
= cu
->objfile
;
6877 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6879 const char *actual_name
= NULL
;
6881 char *built_actual_name
;
6883 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6885 built_actual_name
= partial_die_full_name (pdi
, cu
);
6886 if (built_actual_name
!= NULL
)
6887 actual_name
= built_actual_name
;
6889 if (actual_name
== NULL
)
6890 actual_name
= pdi
->name
;
6894 case DW_TAG_subprogram
:
6895 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6896 if (pdi
->is_external
|| cu
->language
== language_ada
)
6898 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6899 of the global scope. But in Ada, we want to be able to access
6900 nested procedures globally. So all Ada subprograms are stored
6901 in the global scope. */
6902 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6904 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6905 built_actual_name
!= NULL
,
6906 VAR_DOMAIN
, LOC_BLOCK
,
6907 &objfile
->global_psymbols
,
6908 0, addr
, cu
->language
, objfile
);
6912 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6914 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6915 built_actual_name
!= NULL
,
6916 VAR_DOMAIN
, LOC_BLOCK
,
6917 &objfile
->static_psymbols
,
6918 0, addr
, cu
->language
, objfile
);
6921 case DW_TAG_constant
:
6923 struct psymbol_allocation_list
*list
;
6925 if (pdi
->is_external
)
6926 list
= &objfile
->global_psymbols
;
6928 list
= &objfile
->static_psymbols
;
6929 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6930 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6931 list
, 0, 0, cu
->language
, objfile
);
6934 case DW_TAG_variable
:
6936 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6940 && !dwarf2_per_objfile
->has_section_at_zero
)
6942 /* A global or static variable may also have been stripped
6943 out by the linker if unused, in which case its address
6944 will be nullified; do not add such variables into partial
6945 symbol table then. */
6947 else if (pdi
->is_external
)
6950 Don't enter into the minimal symbol tables as there is
6951 a minimal symbol table entry from the ELF symbols already.
6952 Enter into partial symbol table if it has a location
6953 descriptor or a type.
6954 If the location descriptor is missing, new_symbol will create
6955 a LOC_UNRESOLVED symbol, the address of the variable will then
6956 be determined from the minimal symbol table whenever the variable
6958 The address for the partial symbol table entry is not
6959 used by GDB, but it comes in handy for debugging partial symbol
6962 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6963 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6964 built_actual_name
!= NULL
,
6965 VAR_DOMAIN
, LOC_STATIC
,
6966 &objfile
->global_psymbols
,
6968 cu
->language
, objfile
);
6972 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6974 /* Static Variable. Skip symbols whose value we cannot know (those
6975 without location descriptors or constant values). */
6976 if (!has_loc
&& !pdi
->has_const_value
)
6978 xfree (built_actual_name
);
6982 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6983 mst_file_data, objfile); */
6984 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6985 built_actual_name
!= NULL
,
6986 VAR_DOMAIN
, LOC_STATIC
,
6987 &objfile
->static_psymbols
,
6989 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6990 cu
->language
, objfile
);
6993 case DW_TAG_typedef
:
6994 case DW_TAG_base_type
:
6995 case DW_TAG_subrange_type
:
6996 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6997 built_actual_name
!= NULL
,
6998 VAR_DOMAIN
, LOC_TYPEDEF
,
6999 &objfile
->static_psymbols
,
7000 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7002 case DW_TAG_imported_declaration
:
7003 case DW_TAG_namespace
:
7004 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7005 built_actual_name
!= NULL
,
7006 VAR_DOMAIN
, LOC_TYPEDEF
,
7007 &objfile
->global_psymbols
,
7008 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7011 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7012 built_actual_name
!= NULL
,
7013 MODULE_DOMAIN
, LOC_TYPEDEF
,
7014 &objfile
->global_psymbols
,
7015 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7017 case DW_TAG_class_type
:
7018 case DW_TAG_interface_type
:
7019 case DW_TAG_structure_type
:
7020 case DW_TAG_union_type
:
7021 case DW_TAG_enumeration_type
:
7022 /* Skip external references. The DWARF standard says in the section
7023 about "Structure, Union, and Class Type Entries": "An incomplete
7024 structure, union or class type is represented by a structure,
7025 union or class entry that does not have a byte size attribute
7026 and that has a DW_AT_declaration attribute." */
7027 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7029 xfree (built_actual_name
);
7033 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7034 static vs. global. */
7035 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7036 built_actual_name
!= NULL
,
7037 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7038 (cu
->language
== language_cplus
7039 || cu
->language
== language_java
)
7040 ? &objfile
->global_psymbols
7041 : &objfile
->static_psymbols
,
7042 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7045 case DW_TAG_enumerator
:
7046 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7047 built_actual_name
!= NULL
,
7048 VAR_DOMAIN
, LOC_CONST
,
7049 (cu
->language
== language_cplus
7050 || cu
->language
== language_java
)
7051 ? &objfile
->global_psymbols
7052 : &objfile
->static_psymbols
,
7053 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7059 xfree (built_actual_name
);
7062 /* Read a partial die corresponding to a namespace; also, add a symbol
7063 corresponding to that namespace to the symbol table. NAMESPACE is
7064 the name of the enclosing namespace. */
7067 add_partial_namespace (struct partial_die_info
*pdi
,
7068 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7069 int set_addrmap
, struct dwarf2_cu
*cu
)
7071 /* Add a symbol for the namespace. */
7073 add_partial_symbol (pdi
, cu
);
7075 /* Now scan partial symbols in that namespace. */
7077 if (pdi
->has_children
)
7078 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7081 /* Read a partial die corresponding to a Fortran module. */
7084 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7085 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7087 /* Add a symbol for the namespace. */
7089 add_partial_symbol (pdi
, cu
);
7091 /* Now scan partial symbols in that module. */
7093 if (pdi
->has_children
)
7094 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7097 /* Read a partial die corresponding to a subprogram and create a partial
7098 symbol for that subprogram. When the CU language allows it, this
7099 routine also defines a partial symbol for each nested subprogram
7100 that this subprogram contains. If SET_ADDRMAP is true, record the
7101 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7102 and highest PC values found in PDI.
7104 PDI may also be a lexical block, in which case we simply search
7105 recursively for subprograms defined inside that lexical block.
7106 Again, this is only performed when the CU language allows this
7107 type of definitions. */
7110 add_partial_subprogram (struct partial_die_info
*pdi
,
7111 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7112 int set_addrmap
, struct dwarf2_cu
*cu
)
7114 if (pdi
->tag
== DW_TAG_subprogram
)
7116 if (pdi
->has_pc_info
)
7118 if (pdi
->lowpc
< *lowpc
)
7119 *lowpc
= pdi
->lowpc
;
7120 if (pdi
->highpc
> *highpc
)
7121 *highpc
= pdi
->highpc
;
7124 struct objfile
*objfile
= cu
->objfile
;
7125 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7130 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7131 SECT_OFF_TEXT (objfile
));
7132 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7133 pdi
->lowpc
+ baseaddr
);
7134 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7135 pdi
->highpc
+ baseaddr
);
7136 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7137 cu
->per_cu
->v
.psymtab
);
7141 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7143 if (!pdi
->is_declaration
)
7144 /* Ignore subprogram DIEs that do not have a name, they are
7145 illegal. Do not emit a complaint at this point, we will
7146 do so when we convert this psymtab into a symtab. */
7148 add_partial_symbol (pdi
, cu
);
7152 if (! pdi
->has_children
)
7155 if (cu
->language
== language_ada
)
7157 pdi
= pdi
->die_child
;
7160 fixup_partial_die (pdi
, cu
);
7161 if (pdi
->tag
== DW_TAG_subprogram
7162 || pdi
->tag
== DW_TAG_lexical_block
)
7163 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7164 pdi
= pdi
->die_sibling
;
7169 /* Read a partial die corresponding to an enumeration type. */
7172 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7173 struct dwarf2_cu
*cu
)
7175 struct partial_die_info
*pdi
;
7177 if (enum_pdi
->name
!= NULL
)
7178 add_partial_symbol (enum_pdi
, cu
);
7180 pdi
= enum_pdi
->die_child
;
7183 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7184 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7186 add_partial_symbol (pdi
, cu
);
7187 pdi
= pdi
->die_sibling
;
7191 /* Return the initial uleb128 in the die at INFO_PTR. */
7194 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7196 unsigned int bytes_read
;
7198 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7201 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7202 Return the corresponding abbrev, or NULL if the number is zero (indicating
7203 an empty DIE). In either case *BYTES_READ will be set to the length of
7204 the initial number. */
7206 static struct abbrev_info
*
7207 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7208 struct dwarf2_cu
*cu
)
7210 bfd
*abfd
= cu
->objfile
->obfd
;
7211 unsigned int abbrev_number
;
7212 struct abbrev_info
*abbrev
;
7214 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7216 if (abbrev_number
== 0)
7219 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7222 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7223 " at offset 0x%x [in module %s]"),
7224 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7225 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7231 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7232 Returns a pointer to the end of a series of DIEs, terminated by an empty
7233 DIE. Any children of the skipped DIEs will also be skipped. */
7235 static const gdb_byte
*
7236 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7238 struct dwarf2_cu
*cu
= reader
->cu
;
7239 struct abbrev_info
*abbrev
;
7240 unsigned int bytes_read
;
7244 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7246 return info_ptr
+ bytes_read
;
7248 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7252 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7253 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7254 abbrev corresponding to that skipped uleb128 should be passed in
7255 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7258 static const gdb_byte
*
7259 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7260 struct abbrev_info
*abbrev
)
7262 unsigned int bytes_read
;
7263 struct attribute attr
;
7264 bfd
*abfd
= reader
->abfd
;
7265 struct dwarf2_cu
*cu
= reader
->cu
;
7266 const gdb_byte
*buffer
= reader
->buffer
;
7267 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7268 const gdb_byte
*start_info_ptr
= info_ptr
;
7269 unsigned int form
, i
;
7271 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7273 /* The only abbrev we care about is DW_AT_sibling. */
7274 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7276 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7277 if (attr
.form
== DW_FORM_ref_addr
)
7278 complaint (&symfile_complaints
,
7279 _("ignoring absolute DW_AT_sibling"));
7282 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7283 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7285 if (sibling_ptr
< info_ptr
)
7286 complaint (&symfile_complaints
,
7287 _("DW_AT_sibling points backwards"));
7288 else if (sibling_ptr
> reader
->buffer_end
)
7289 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7295 /* If it isn't DW_AT_sibling, skip this attribute. */
7296 form
= abbrev
->attrs
[i
].form
;
7300 case DW_FORM_ref_addr
:
7301 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7302 and later it is offset sized. */
7303 if (cu
->header
.version
== 2)
7304 info_ptr
+= cu
->header
.addr_size
;
7306 info_ptr
+= cu
->header
.offset_size
;
7308 case DW_FORM_GNU_ref_alt
:
7309 info_ptr
+= cu
->header
.offset_size
;
7312 info_ptr
+= cu
->header
.addr_size
;
7319 case DW_FORM_flag_present
:
7331 case DW_FORM_ref_sig8
:
7334 case DW_FORM_string
:
7335 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7336 info_ptr
+= bytes_read
;
7338 case DW_FORM_sec_offset
:
7340 case DW_FORM_GNU_strp_alt
:
7341 info_ptr
+= cu
->header
.offset_size
;
7343 case DW_FORM_exprloc
:
7345 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7346 info_ptr
+= bytes_read
;
7348 case DW_FORM_block1
:
7349 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7351 case DW_FORM_block2
:
7352 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7354 case DW_FORM_block4
:
7355 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7359 case DW_FORM_ref_udata
:
7360 case DW_FORM_GNU_addr_index
:
7361 case DW_FORM_GNU_str_index
:
7362 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7364 case DW_FORM_indirect
:
7365 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7366 info_ptr
+= bytes_read
;
7367 /* We need to continue parsing from here, so just go back to
7369 goto skip_attribute
;
7372 error (_("Dwarf Error: Cannot handle %s "
7373 "in DWARF reader [in module %s]"),
7374 dwarf_form_name (form
),
7375 bfd_get_filename (abfd
));
7379 if (abbrev
->has_children
)
7380 return skip_children (reader
, info_ptr
);
7385 /* Locate ORIG_PDI's sibling.
7386 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7388 static const gdb_byte
*
7389 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7390 struct partial_die_info
*orig_pdi
,
7391 const gdb_byte
*info_ptr
)
7393 /* Do we know the sibling already? */
7395 if (orig_pdi
->sibling
)
7396 return orig_pdi
->sibling
;
7398 /* Are there any children to deal with? */
7400 if (!orig_pdi
->has_children
)
7403 /* Skip the children the long way. */
7405 return skip_children (reader
, info_ptr
);
7408 /* Expand this partial symbol table into a full symbol table. SELF is
7412 dwarf2_read_symtab (struct partial_symtab
*self
,
7413 struct objfile
*objfile
)
7417 warning (_("bug: psymtab for %s is already read in."),
7424 printf_filtered (_("Reading in symbols for %s..."),
7426 gdb_flush (gdb_stdout
);
7429 /* Restore our global data. */
7430 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7432 /* If this psymtab is constructed from a debug-only objfile, the
7433 has_section_at_zero flag will not necessarily be correct. We
7434 can get the correct value for this flag by looking at the data
7435 associated with the (presumably stripped) associated objfile. */
7436 if (objfile
->separate_debug_objfile_backlink
)
7438 struct dwarf2_per_objfile
*dpo_backlink
7439 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7440 dwarf2_objfile_data_key
);
7442 dwarf2_per_objfile
->has_section_at_zero
7443 = dpo_backlink
->has_section_at_zero
;
7446 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7448 psymtab_to_symtab_1 (self
);
7450 /* Finish up the debug error message. */
7452 printf_filtered (_("done.\n"));
7455 process_cu_includes ();
7458 /* Reading in full CUs. */
7460 /* Add PER_CU to the queue. */
7463 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7464 enum language pretend_language
)
7466 struct dwarf2_queue_item
*item
;
7469 item
= xmalloc (sizeof (*item
));
7470 item
->per_cu
= per_cu
;
7471 item
->pretend_language
= pretend_language
;
7474 if (dwarf2_queue
== NULL
)
7475 dwarf2_queue
= item
;
7477 dwarf2_queue_tail
->next
= item
;
7479 dwarf2_queue_tail
= item
;
7482 /* If PER_CU is not yet queued, add it to the queue.
7483 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7485 The result is non-zero if PER_CU was queued, otherwise the result is zero
7486 meaning either PER_CU is already queued or it is already loaded.
7488 N.B. There is an invariant here that if a CU is queued then it is loaded.
7489 The caller is required to load PER_CU if we return non-zero. */
7492 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7493 struct dwarf2_per_cu_data
*per_cu
,
7494 enum language pretend_language
)
7496 /* We may arrive here during partial symbol reading, if we need full
7497 DIEs to process an unusual case (e.g. template arguments). Do
7498 not queue PER_CU, just tell our caller to load its DIEs. */
7499 if (dwarf2_per_objfile
->reading_partial_symbols
)
7501 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7506 /* Mark the dependence relation so that we don't flush PER_CU
7508 if (dependent_cu
!= NULL
)
7509 dwarf2_add_dependence (dependent_cu
, per_cu
);
7511 /* If it's already on the queue, we have nothing to do. */
7515 /* If the compilation unit is already loaded, just mark it as
7517 if (per_cu
->cu
!= NULL
)
7519 per_cu
->cu
->last_used
= 0;
7523 /* Add it to the queue. */
7524 queue_comp_unit (per_cu
, pretend_language
);
7529 /* Process the queue. */
7532 process_queue (void)
7534 struct dwarf2_queue_item
*item
, *next_item
;
7536 if (dwarf_read_debug
)
7538 fprintf_unfiltered (gdb_stdlog
,
7539 "Expanding one or more symtabs of objfile %s ...\n",
7540 objfile_name (dwarf2_per_objfile
->objfile
));
7543 /* The queue starts out with one item, but following a DIE reference
7544 may load a new CU, adding it to the end of the queue. */
7545 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7547 if (dwarf2_per_objfile
->using_index
7548 ? !item
->per_cu
->v
.quick
->compunit_symtab
7549 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7551 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7552 unsigned int debug_print_threshold
;
7555 if (per_cu
->is_debug_types
)
7557 struct signatured_type
*sig_type
=
7558 (struct signatured_type
*) per_cu
;
7560 sprintf (buf
, "TU %s at offset 0x%x",
7561 hex_string (sig_type
->signature
),
7562 per_cu
->offset
.sect_off
);
7563 /* There can be 100s of TUs.
7564 Only print them in verbose mode. */
7565 debug_print_threshold
= 2;
7569 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7570 debug_print_threshold
= 1;
7573 if (dwarf_read_debug
>= debug_print_threshold
)
7574 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7576 if (per_cu
->is_debug_types
)
7577 process_full_type_unit (per_cu
, item
->pretend_language
);
7579 process_full_comp_unit (per_cu
, item
->pretend_language
);
7581 if (dwarf_read_debug
>= debug_print_threshold
)
7582 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7585 item
->per_cu
->queued
= 0;
7586 next_item
= item
->next
;
7590 dwarf2_queue_tail
= NULL
;
7592 if (dwarf_read_debug
)
7594 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7595 objfile_name (dwarf2_per_objfile
->objfile
));
7599 /* Free all allocated queue entries. This function only releases anything if
7600 an error was thrown; if the queue was processed then it would have been
7601 freed as we went along. */
7604 dwarf2_release_queue (void *dummy
)
7606 struct dwarf2_queue_item
*item
, *last
;
7608 item
= dwarf2_queue
;
7611 /* Anything still marked queued is likely to be in an
7612 inconsistent state, so discard it. */
7613 if (item
->per_cu
->queued
)
7615 if (item
->per_cu
->cu
!= NULL
)
7616 free_one_cached_comp_unit (item
->per_cu
);
7617 item
->per_cu
->queued
= 0;
7625 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7628 /* Read in full symbols for PST, and anything it depends on. */
7631 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7633 struct dwarf2_per_cu_data
*per_cu
;
7639 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7640 if (!pst
->dependencies
[i
]->readin
7641 && pst
->dependencies
[i
]->user
== NULL
)
7643 /* Inform about additional files that need to be read in. */
7646 /* FIXME: i18n: Need to make this a single string. */
7647 fputs_filtered (" ", gdb_stdout
);
7649 fputs_filtered ("and ", gdb_stdout
);
7651 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7652 wrap_here (""); /* Flush output. */
7653 gdb_flush (gdb_stdout
);
7655 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7658 per_cu
= pst
->read_symtab_private
;
7662 /* It's an include file, no symbols to read for it.
7663 Everything is in the parent symtab. */
7668 dw2_do_instantiate_symtab (per_cu
);
7671 /* Trivial hash function for die_info: the hash value of a DIE
7672 is its offset in .debug_info for this objfile. */
7675 die_hash (const void *item
)
7677 const struct die_info
*die
= item
;
7679 return die
->offset
.sect_off
;
7682 /* Trivial comparison function for die_info structures: two DIEs
7683 are equal if they have the same offset. */
7686 die_eq (const void *item_lhs
, const void *item_rhs
)
7688 const struct die_info
*die_lhs
= item_lhs
;
7689 const struct die_info
*die_rhs
= item_rhs
;
7691 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7694 /* die_reader_func for load_full_comp_unit.
7695 This is identical to read_signatured_type_reader,
7696 but is kept separate for now. */
7699 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7700 const gdb_byte
*info_ptr
,
7701 struct die_info
*comp_unit_die
,
7705 struct dwarf2_cu
*cu
= reader
->cu
;
7706 enum language
*language_ptr
= data
;
7708 gdb_assert (cu
->die_hash
== NULL
);
7710 htab_create_alloc_ex (cu
->header
.length
/ 12,
7714 &cu
->comp_unit_obstack
,
7715 hashtab_obstack_allocate
,
7716 dummy_obstack_deallocate
);
7719 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7720 &info_ptr
, comp_unit_die
);
7721 cu
->dies
= comp_unit_die
;
7722 /* comp_unit_die is not stored in die_hash, no need. */
7724 /* We try not to read any attributes in this function, because not
7725 all CUs needed for references have been loaded yet, and symbol
7726 table processing isn't initialized. But we have to set the CU language,
7727 or we won't be able to build types correctly.
7728 Similarly, if we do not read the producer, we can not apply
7729 producer-specific interpretation. */
7730 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7733 /* Load the DIEs associated with PER_CU into memory. */
7736 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7737 enum language pretend_language
)
7739 gdb_assert (! this_cu
->is_debug_types
);
7741 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7742 load_full_comp_unit_reader
, &pretend_language
);
7745 /* Add a DIE to the delayed physname list. */
7748 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7749 const char *name
, struct die_info
*die
,
7750 struct dwarf2_cu
*cu
)
7752 struct delayed_method_info mi
;
7754 mi
.fnfield_index
= fnfield_index
;
7758 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7761 /* A cleanup for freeing the delayed method list. */
7764 free_delayed_list (void *ptr
)
7766 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7767 if (cu
->method_list
!= NULL
)
7769 VEC_free (delayed_method_info
, cu
->method_list
);
7770 cu
->method_list
= NULL
;
7774 /* Compute the physnames of any methods on the CU's method list.
7776 The computation of method physnames is delayed in order to avoid the
7777 (bad) condition that one of the method's formal parameters is of an as yet
7781 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7784 struct delayed_method_info
*mi
;
7785 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7787 const char *physname
;
7788 struct fn_fieldlist
*fn_flp
7789 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7790 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7791 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7792 = physname
? physname
: "";
7796 /* Go objects should be embedded in a DW_TAG_module DIE,
7797 and it's not clear if/how imported objects will appear.
7798 To keep Go support simple until that's worked out,
7799 go back through what we've read and create something usable.
7800 We could do this while processing each DIE, and feels kinda cleaner,
7801 but that way is more invasive.
7802 This is to, for example, allow the user to type "p var" or "b main"
7803 without having to specify the package name, and allow lookups
7804 of module.object to work in contexts that use the expression
7808 fixup_go_packaging (struct dwarf2_cu
*cu
)
7810 char *package_name
= NULL
;
7811 struct pending
*list
;
7814 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7816 for (i
= 0; i
< list
->nsyms
; ++i
)
7818 struct symbol
*sym
= list
->symbol
[i
];
7820 if (SYMBOL_LANGUAGE (sym
) == language_go
7821 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7823 char *this_package_name
= go_symbol_package_name (sym
);
7825 if (this_package_name
== NULL
)
7827 if (package_name
== NULL
)
7828 package_name
= this_package_name
;
7831 if (strcmp (package_name
, this_package_name
) != 0)
7832 complaint (&symfile_complaints
,
7833 _("Symtab %s has objects from two different Go packages: %s and %s"),
7834 (symbol_symtab (sym
) != NULL
7835 ? symtab_to_filename_for_display
7836 (symbol_symtab (sym
))
7837 : objfile_name (cu
->objfile
)),
7838 this_package_name
, package_name
);
7839 xfree (this_package_name
);
7845 if (package_name
!= NULL
)
7847 struct objfile
*objfile
= cu
->objfile
;
7848 const char *saved_package_name
7849 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7851 strlen (package_name
));
7852 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7853 saved_package_name
, objfile
);
7856 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7858 sym
= allocate_symbol (objfile
);
7859 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7860 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7861 strlen (saved_package_name
), 0, objfile
);
7862 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7863 e.g., "main" finds the "main" module and not C's main(). */
7864 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7865 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7866 SYMBOL_TYPE (sym
) = type
;
7868 add_symbol_to_list (sym
, &global_symbols
);
7870 xfree (package_name
);
7874 /* Return the symtab for PER_CU. This works properly regardless of
7875 whether we're using the index or psymtabs. */
7877 static struct compunit_symtab
*
7878 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7880 return (dwarf2_per_objfile
->using_index
7881 ? per_cu
->v
.quick
->compunit_symtab
7882 : per_cu
->v
.psymtab
->compunit_symtab
);
7885 /* A helper function for computing the list of all symbol tables
7886 included by PER_CU. */
7889 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7890 htab_t all_children
, htab_t all_type_symtabs
,
7891 struct dwarf2_per_cu_data
*per_cu
,
7892 struct compunit_symtab
*immediate_parent
)
7896 struct compunit_symtab
*cust
;
7897 struct dwarf2_per_cu_data
*iter
;
7899 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7902 /* This inclusion and its children have been processed. */
7907 /* Only add a CU if it has a symbol table. */
7908 cust
= get_compunit_symtab (per_cu
);
7911 /* If this is a type unit only add its symbol table if we haven't
7912 seen it yet (type unit per_cu's can share symtabs). */
7913 if (per_cu
->is_debug_types
)
7915 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7919 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7920 if (cust
->user
== NULL
)
7921 cust
->user
= immediate_parent
;
7926 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7927 if (cust
->user
== NULL
)
7928 cust
->user
= immediate_parent
;
7933 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7936 recursively_compute_inclusions (result
, all_children
,
7937 all_type_symtabs
, iter
, cust
);
7941 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7945 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7947 gdb_assert (! per_cu
->is_debug_types
);
7949 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7952 struct dwarf2_per_cu_data
*per_cu_iter
;
7953 struct compunit_symtab
*compunit_symtab_iter
;
7954 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7955 htab_t all_children
, all_type_symtabs
;
7956 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7958 /* If we don't have a symtab, we can just skip this case. */
7962 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7963 NULL
, xcalloc
, xfree
);
7964 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7965 NULL
, xcalloc
, xfree
);
7968 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7972 recursively_compute_inclusions (&result_symtabs
, all_children
,
7973 all_type_symtabs
, per_cu_iter
,
7977 /* Now we have a transitive closure of all the included symtabs. */
7978 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7980 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7981 (len
+ 1) * sizeof (struct symtab
*));
7983 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7984 compunit_symtab_iter
);
7986 cust
->includes
[ix
] = compunit_symtab_iter
;
7987 cust
->includes
[len
] = NULL
;
7989 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7990 htab_delete (all_children
);
7991 htab_delete (all_type_symtabs
);
7995 /* Compute the 'includes' field for the symtabs of all the CUs we just
7999 process_cu_includes (void)
8002 struct dwarf2_per_cu_data
*iter
;
8005 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8009 if (! iter
->is_debug_types
)
8010 compute_compunit_symtab_includes (iter
);
8013 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8016 /* Generate full symbol information for PER_CU, whose DIEs have
8017 already been loaded into memory. */
8020 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8021 enum language pretend_language
)
8023 struct dwarf2_cu
*cu
= per_cu
->cu
;
8024 struct objfile
*objfile
= per_cu
->objfile
;
8025 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8026 CORE_ADDR lowpc
, highpc
;
8027 struct compunit_symtab
*cust
;
8028 struct cleanup
*back_to
, *delayed_list_cleanup
;
8030 struct block
*static_block
;
8033 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8036 back_to
= make_cleanup (really_free_pendings
, NULL
);
8037 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8039 cu
->list_in_scope
= &file_symbols
;
8041 cu
->language
= pretend_language
;
8042 cu
->language_defn
= language_def (cu
->language
);
8044 /* Do line number decoding in read_file_scope () */
8045 process_die (cu
->dies
, cu
);
8047 /* For now fudge the Go package. */
8048 if (cu
->language
== language_go
)
8049 fixup_go_packaging (cu
);
8051 /* Now that we have processed all the DIEs in the CU, all the types
8052 should be complete, and it should now be safe to compute all of the
8054 compute_delayed_physnames (cu
);
8055 do_cleanups (delayed_list_cleanup
);
8057 /* Some compilers don't define a DW_AT_high_pc attribute for the
8058 compilation unit. If the DW_AT_high_pc is missing, synthesize
8059 it, by scanning the DIE's below the compilation unit. */
8060 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8062 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8063 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8065 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8066 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8067 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8068 addrmap to help ensure it has an accurate map of pc values belonging to
8070 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8072 cust
= end_symtab_from_static_block (static_block
,
8073 SECT_OFF_TEXT (objfile
), 0);
8077 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8079 /* Set symtab language to language from DW_AT_language. If the
8080 compilation is from a C file generated by language preprocessors, do
8081 not set the language if it was already deduced by start_subfile. */
8082 if (!(cu
->language
== language_c
8083 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8084 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8086 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8087 produce DW_AT_location with location lists but it can be possibly
8088 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8089 there were bugs in prologue debug info, fixed later in GCC-4.5
8090 by "unwind info for epilogues" patch (which is not directly related).
8092 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8093 needed, it would be wrong due to missing DW_AT_producer there.
8095 Still one can confuse GDB by using non-standard GCC compilation
8096 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8098 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8099 cust
->locations_valid
= 1;
8101 if (gcc_4_minor
>= 5)
8102 cust
->epilogue_unwind_valid
= 1;
8104 cust
->call_site_htab
= cu
->call_site_htab
;
8107 if (dwarf2_per_objfile
->using_index
)
8108 per_cu
->v
.quick
->compunit_symtab
= cust
;
8111 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8112 pst
->compunit_symtab
= cust
;
8116 /* Push it for inclusion processing later. */
8117 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8119 do_cleanups (back_to
);
8122 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8123 already been loaded into memory. */
8126 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8127 enum language pretend_language
)
8129 struct dwarf2_cu
*cu
= per_cu
->cu
;
8130 struct objfile
*objfile
= per_cu
->objfile
;
8131 struct compunit_symtab
*cust
;
8132 struct cleanup
*back_to
, *delayed_list_cleanup
;
8133 struct signatured_type
*sig_type
;
8135 gdb_assert (per_cu
->is_debug_types
);
8136 sig_type
= (struct signatured_type
*) per_cu
;
8139 back_to
= make_cleanup (really_free_pendings
, NULL
);
8140 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8142 cu
->list_in_scope
= &file_symbols
;
8144 cu
->language
= pretend_language
;
8145 cu
->language_defn
= language_def (cu
->language
);
8147 /* The symbol tables are set up in read_type_unit_scope. */
8148 process_die (cu
->dies
, cu
);
8150 /* For now fudge the Go package. */
8151 if (cu
->language
== language_go
)
8152 fixup_go_packaging (cu
);
8154 /* Now that we have processed all the DIEs in the CU, all the types
8155 should be complete, and it should now be safe to compute all of the
8157 compute_delayed_physnames (cu
);
8158 do_cleanups (delayed_list_cleanup
);
8160 /* TUs share symbol tables.
8161 If this is the first TU to use this symtab, complete the construction
8162 of it with end_expandable_symtab. Otherwise, complete the addition of
8163 this TU's symbols to the existing symtab. */
8164 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8166 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8167 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8171 /* Set symtab language to language from DW_AT_language. If the
8172 compilation is from a C file generated by language preprocessors,
8173 do not set the language if it was already deduced by
8175 if (!(cu
->language
== language_c
8176 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8177 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8182 augment_type_symtab ();
8183 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8186 if (dwarf2_per_objfile
->using_index
)
8187 per_cu
->v
.quick
->compunit_symtab
= cust
;
8190 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8191 pst
->compunit_symtab
= cust
;
8195 do_cleanups (back_to
);
8198 /* Process an imported unit DIE. */
8201 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8203 struct attribute
*attr
;
8205 /* For now we don't handle imported units in type units. */
8206 if (cu
->per_cu
->is_debug_types
)
8208 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8209 " supported in type units [in module %s]"),
8210 objfile_name (cu
->objfile
));
8213 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8216 struct dwarf2_per_cu_data
*per_cu
;
8217 struct symtab
*imported_symtab
;
8221 offset
= dwarf2_get_ref_die_offset (attr
);
8222 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8223 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8225 /* If necessary, add it to the queue and load its DIEs. */
8226 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8227 load_full_comp_unit (per_cu
, cu
->language
);
8229 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8234 /* Reset the in_process bit of a die. */
8237 reset_die_in_process (void *arg
)
8239 struct die_info
*die
= arg
;
8241 die
->in_process
= 0;
8244 /* Process a die and its children. */
8247 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8249 struct cleanup
*in_process
;
8251 /* We should only be processing those not already in process. */
8252 gdb_assert (!die
->in_process
);
8254 die
->in_process
= 1;
8255 in_process
= make_cleanup (reset_die_in_process
,die
);
8259 case DW_TAG_padding
:
8261 case DW_TAG_compile_unit
:
8262 case DW_TAG_partial_unit
:
8263 read_file_scope (die
, cu
);
8265 case DW_TAG_type_unit
:
8266 read_type_unit_scope (die
, cu
);
8268 case DW_TAG_subprogram
:
8269 case DW_TAG_inlined_subroutine
:
8270 read_func_scope (die
, cu
);
8272 case DW_TAG_lexical_block
:
8273 case DW_TAG_try_block
:
8274 case DW_TAG_catch_block
:
8275 read_lexical_block_scope (die
, cu
);
8277 case DW_TAG_GNU_call_site
:
8278 read_call_site_scope (die
, cu
);
8280 case DW_TAG_class_type
:
8281 case DW_TAG_interface_type
:
8282 case DW_TAG_structure_type
:
8283 case DW_TAG_union_type
:
8284 process_structure_scope (die
, cu
);
8286 case DW_TAG_enumeration_type
:
8287 process_enumeration_scope (die
, cu
);
8290 /* These dies have a type, but processing them does not create
8291 a symbol or recurse to process the children. Therefore we can
8292 read them on-demand through read_type_die. */
8293 case DW_TAG_subroutine_type
:
8294 case DW_TAG_set_type
:
8295 case DW_TAG_array_type
:
8296 case DW_TAG_pointer_type
:
8297 case DW_TAG_ptr_to_member_type
:
8298 case DW_TAG_reference_type
:
8299 case DW_TAG_string_type
:
8302 case DW_TAG_base_type
:
8303 case DW_TAG_subrange_type
:
8304 case DW_TAG_typedef
:
8305 /* Add a typedef symbol for the type definition, if it has a
8307 new_symbol (die
, read_type_die (die
, cu
), cu
);
8309 case DW_TAG_common_block
:
8310 read_common_block (die
, cu
);
8312 case DW_TAG_common_inclusion
:
8314 case DW_TAG_namespace
:
8315 cu
->processing_has_namespace_info
= 1;
8316 read_namespace (die
, cu
);
8319 cu
->processing_has_namespace_info
= 1;
8320 read_module (die
, cu
);
8322 case DW_TAG_imported_declaration
:
8323 cu
->processing_has_namespace_info
= 1;
8324 if (read_namespace_alias (die
, cu
))
8326 /* The declaration is not a global namespace alias: fall through. */
8327 case DW_TAG_imported_module
:
8328 cu
->processing_has_namespace_info
= 1;
8329 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8330 || cu
->language
!= language_fortran
))
8331 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8332 dwarf_tag_name (die
->tag
));
8333 read_import_statement (die
, cu
);
8336 case DW_TAG_imported_unit
:
8337 process_imported_unit_die (die
, cu
);
8341 new_symbol (die
, NULL
, cu
);
8345 do_cleanups (in_process
);
8348 /* DWARF name computation. */
8350 /* A helper function for dwarf2_compute_name which determines whether DIE
8351 needs to have the name of the scope prepended to the name listed in the
8355 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8357 struct attribute
*attr
;
8361 case DW_TAG_namespace
:
8362 case DW_TAG_typedef
:
8363 case DW_TAG_class_type
:
8364 case DW_TAG_interface_type
:
8365 case DW_TAG_structure_type
:
8366 case DW_TAG_union_type
:
8367 case DW_TAG_enumeration_type
:
8368 case DW_TAG_enumerator
:
8369 case DW_TAG_subprogram
:
8370 case DW_TAG_inlined_subroutine
:
8372 case DW_TAG_imported_declaration
:
8375 case DW_TAG_variable
:
8376 case DW_TAG_constant
:
8377 /* We only need to prefix "globally" visible variables. These include
8378 any variable marked with DW_AT_external or any variable that
8379 lives in a namespace. [Variables in anonymous namespaces
8380 require prefixing, but they are not DW_AT_external.] */
8382 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8384 struct dwarf2_cu
*spec_cu
= cu
;
8386 return die_needs_namespace (die_specification (die
, &spec_cu
),
8390 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8391 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8392 && die
->parent
->tag
!= DW_TAG_module
)
8394 /* A variable in a lexical block of some kind does not need a
8395 namespace, even though in C++ such variables may be external
8396 and have a mangled name. */
8397 if (die
->parent
->tag
== DW_TAG_lexical_block
8398 || die
->parent
->tag
== DW_TAG_try_block
8399 || die
->parent
->tag
== DW_TAG_catch_block
8400 || die
->parent
->tag
== DW_TAG_subprogram
)
8409 /* Retrieve the last character from a mem_file. */
8412 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8414 char *last_char_p
= (char *) object
;
8417 *last_char_p
= buffer
[length
- 1];
8420 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8421 compute the physname for the object, which include a method's:
8422 - formal parameters (C++/Java),
8423 - receiver type (Go),
8424 - return type (Java).
8426 The term "physname" is a bit confusing.
8427 For C++, for example, it is the demangled name.
8428 For Go, for example, it's the mangled name.
8430 For Ada, return the DIE's linkage name rather than the fully qualified
8431 name. PHYSNAME is ignored..
8433 The result is allocated on the objfile_obstack and canonicalized. */
8436 dwarf2_compute_name (const char *name
,
8437 struct die_info
*die
, struct dwarf2_cu
*cu
,
8440 struct objfile
*objfile
= cu
->objfile
;
8443 name
= dwarf2_name (die
, cu
);
8445 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8446 compute it by typename_concat inside GDB. */
8447 if (cu
->language
== language_ada
8448 || (cu
->language
== language_fortran
&& physname
))
8450 /* For Ada unit, we prefer the linkage name over the name, as
8451 the former contains the exported name, which the user expects
8452 to be able to reference. Ideally, we want the user to be able
8453 to reference this entity using either natural or linkage name,
8454 but we haven't started looking at this enhancement yet. */
8455 struct attribute
*attr
;
8457 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8459 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8460 if (attr
&& DW_STRING (attr
))
8461 return DW_STRING (attr
);
8464 /* These are the only languages we know how to qualify names in. */
8466 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8467 || cu
->language
== language_fortran
|| cu
->language
== language_d
))
8469 if (die_needs_namespace (die
, cu
))
8473 struct ui_file
*buf
;
8474 char *intermediate_name
;
8475 const char *canonical_name
= NULL
;
8477 prefix
= determine_prefix (die
, cu
);
8478 buf
= mem_fileopen ();
8479 if (*prefix
!= '\0')
8481 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8484 fputs_unfiltered (prefixed_name
, buf
);
8485 xfree (prefixed_name
);
8488 fputs_unfiltered (name
, buf
);
8490 /* Template parameters may be specified in the DIE's DW_AT_name, or
8491 as children with DW_TAG_template_type_param or
8492 DW_TAG_value_type_param. If the latter, add them to the name
8493 here. If the name already has template parameters, then
8494 skip this step; some versions of GCC emit both, and
8495 it is more efficient to use the pre-computed name.
8497 Something to keep in mind about this process: it is very
8498 unlikely, or in some cases downright impossible, to produce
8499 something that will match the mangled name of a function.
8500 If the definition of the function has the same debug info,
8501 we should be able to match up with it anyway. But fallbacks
8502 using the minimal symbol, for instance to find a method
8503 implemented in a stripped copy of libstdc++, will not work.
8504 If we do not have debug info for the definition, we will have to
8505 match them up some other way.
8507 When we do name matching there is a related problem with function
8508 templates; two instantiated function templates are allowed to
8509 differ only by their return types, which we do not add here. */
8511 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8513 struct attribute
*attr
;
8514 struct die_info
*child
;
8517 die
->building_fullname
= 1;
8519 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8523 const gdb_byte
*bytes
;
8524 struct dwarf2_locexpr_baton
*baton
;
8527 if (child
->tag
!= DW_TAG_template_type_param
8528 && child
->tag
!= DW_TAG_template_value_param
)
8533 fputs_unfiltered ("<", buf
);
8537 fputs_unfiltered (", ", buf
);
8539 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8542 complaint (&symfile_complaints
,
8543 _("template parameter missing DW_AT_type"));
8544 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8547 type
= die_type (child
, cu
);
8549 if (child
->tag
== DW_TAG_template_type_param
)
8551 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8555 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8558 complaint (&symfile_complaints
,
8559 _("template parameter missing "
8560 "DW_AT_const_value"));
8561 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8565 dwarf2_const_value_attr (attr
, type
, name
,
8566 &cu
->comp_unit_obstack
, cu
,
8567 &value
, &bytes
, &baton
);
8569 if (TYPE_NOSIGN (type
))
8570 /* GDB prints characters as NUMBER 'CHAR'. If that's
8571 changed, this can use value_print instead. */
8572 c_printchar (value
, type
, buf
);
8575 struct value_print_options opts
;
8578 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8582 else if (bytes
!= NULL
)
8584 v
= allocate_value (type
);
8585 memcpy (value_contents_writeable (v
), bytes
,
8586 TYPE_LENGTH (type
));
8589 v
= value_from_longest (type
, value
);
8591 /* Specify decimal so that we do not depend on
8593 get_formatted_print_options (&opts
, 'd');
8595 value_print (v
, buf
, &opts
);
8601 die
->building_fullname
= 0;
8605 /* Close the argument list, with a space if necessary
8606 (nested templates). */
8607 char last_char
= '\0';
8608 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8609 if (last_char
== '>')
8610 fputs_unfiltered (" >", buf
);
8612 fputs_unfiltered (">", buf
);
8616 /* For Java and C++ methods, append formal parameter type
8617 information, if PHYSNAME. */
8619 if (physname
&& die
->tag
== DW_TAG_subprogram
8620 && (cu
->language
== language_cplus
8621 || cu
->language
== language_java
))
8623 struct type
*type
= read_type_die (die
, cu
);
8625 c_type_print_args (type
, buf
, 1, cu
->language
,
8626 &type_print_raw_options
);
8628 if (cu
->language
== language_java
)
8630 /* For java, we must append the return type to method
8632 if (die
->tag
== DW_TAG_subprogram
)
8633 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8634 0, 0, &type_print_raw_options
);
8636 else if (cu
->language
== language_cplus
)
8638 /* Assume that an artificial first parameter is
8639 "this", but do not crash if it is not. RealView
8640 marks unnamed (and thus unused) parameters as
8641 artificial; there is no way to differentiate
8643 if (TYPE_NFIELDS (type
) > 0
8644 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8645 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8646 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8648 fputs_unfiltered (" const", buf
);
8652 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8653 ui_file_delete (buf
);
8655 if (cu
->language
== language_cplus
)
8657 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8658 &objfile
->per_bfd
->storage_obstack
);
8660 /* If we only computed INTERMEDIATE_NAME, or if
8661 INTERMEDIATE_NAME is already canonical, then we need to
8662 copy it to the appropriate obstack. */
8663 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8664 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8666 strlen (intermediate_name
));
8668 name
= canonical_name
;
8670 xfree (intermediate_name
);
8677 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8678 If scope qualifiers are appropriate they will be added. The result
8679 will be allocated on the storage_obstack, or NULL if the DIE does
8680 not have a name. NAME may either be from a previous call to
8681 dwarf2_name or NULL.
8683 The output string will be canonicalized (if C++/Java). */
8686 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8688 return dwarf2_compute_name (name
, die
, cu
, 0);
8691 /* Construct a physname for the given DIE in CU. NAME may either be
8692 from a previous call to dwarf2_name or NULL. The result will be
8693 allocated on the objfile_objstack or NULL if the DIE does not have a
8696 The output string will be canonicalized (if C++/Java). */
8699 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8701 struct objfile
*objfile
= cu
->objfile
;
8702 struct attribute
*attr
;
8703 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8704 struct cleanup
*back_to
;
8707 /* In this case dwarf2_compute_name is just a shortcut not building anything
8709 if (!die_needs_namespace (die
, cu
))
8710 return dwarf2_compute_name (name
, die
, cu
, 1);
8712 back_to
= make_cleanup (null_cleanup
, NULL
);
8714 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8716 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8718 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8720 if (attr
&& DW_STRING (attr
))
8724 mangled
= DW_STRING (attr
);
8726 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8727 type. It is easier for GDB users to search for such functions as
8728 `name(params)' than `long name(params)'. In such case the minimal
8729 symbol names do not match the full symbol names but for template
8730 functions there is never a need to look up their definition from their
8731 declaration so the only disadvantage remains the minimal symbol
8732 variant `long name(params)' does not have the proper inferior type.
8735 if (cu
->language
== language_go
)
8737 /* This is a lie, but we already lie to the caller new_symbol_full.
8738 new_symbol_full assumes we return the mangled name.
8739 This just undoes that lie until things are cleaned up. */
8744 demangled
= gdb_demangle (mangled
,
8745 (DMGL_PARAMS
| DMGL_ANSI
8746 | (cu
->language
== language_java
8747 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8752 make_cleanup (xfree
, demangled
);
8762 if (canon
== NULL
|| check_physname
)
8764 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8766 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8768 /* It may not mean a bug in GDB. The compiler could also
8769 compute DW_AT_linkage_name incorrectly. But in such case
8770 GDB would need to be bug-to-bug compatible. */
8772 complaint (&symfile_complaints
,
8773 _("Computed physname <%s> does not match demangled <%s> "
8774 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8775 physname
, canon
, mangled
, die
->offset
.sect_off
,
8776 objfile_name (objfile
));
8778 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8779 is available here - over computed PHYSNAME. It is safer
8780 against both buggy GDB and buggy compilers. */
8794 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8795 retval
, strlen (retval
));
8797 do_cleanups (back_to
);
8801 /* Inspect DIE in CU for a namespace alias. If one exists, record
8802 a new symbol for it.
8804 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8807 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8809 struct attribute
*attr
;
8811 /* If the die does not have a name, this is not a namespace
8813 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8817 struct die_info
*d
= die
;
8818 struct dwarf2_cu
*imported_cu
= cu
;
8820 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8821 keep inspecting DIEs until we hit the underlying import. */
8822 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8823 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8825 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8829 d
= follow_die_ref (d
, attr
, &imported_cu
);
8830 if (d
->tag
!= DW_TAG_imported_declaration
)
8834 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8836 complaint (&symfile_complaints
,
8837 _("DIE at 0x%x has too many recursively imported "
8838 "declarations"), d
->offset
.sect_off
);
8845 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8847 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8848 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8850 /* This declaration is a global namespace alias. Add
8851 a symbol for it whose type is the aliased namespace. */
8852 new_symbol (die
, type
, cu
);
8861 /* Read the import statement specified by the given die and record it. */
8864 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8866 struct objfile
*objfile
= cu
->objfile
;
8867 struct attribute
*import_attr
;
8868 struct die_info
*imported_die
, *child_die
;
8869 struct dwarf2_cu
*imported_cu
;
8870 const char *imported_name
;
8871 const char *imported_name_prefix
;
8872 const char *canonical_name
;
8873 const char *import_alias
;
8874 const char *imported_declaration
= NULL
;
8875 const char *import_prefix
;
8876 VEC (const_char_ptr
) *excludes
= NULL
;
8877 struct cleanup
*cleanups
;
8879 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8880 if (import_attr
== NULL
)
8882 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8883 dwarf_tag_name (die
->tag
));
8888 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8889 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8890 if (imported_name
== NULL
)
8892 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8894 The import in the following code:
8908 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8909 <52> DW_AT_decl_file : 1
8910 <53> DW_AT_decl_line : 6
8911 <54> DW_AT_import : <0x75>
8912 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8914 <5b> DW_AT_decl_file : 1
8915 <5c> DW_AT_decl_line : 2
8916 <5d> DW_AT_type : <0x6e>
8918 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8919 <76> DW_AT_byte_size : 4
8920 <77> DW_AT_encoding : 5 (signed)
8922 imports the wrong die ( 0x75 instead of 0x58 ).
8923 This case will be ignored until the gcc bug is fixed. */
8927 /* Figure out the local name after import. */
8928 import_alias
= dwarf2_name (die
, cu
);
8930 /* Figure out where the statement is being imported to. */
8931 import_prefix
= determine_prefix (die
, cu
);
8933 /* Figure out what the scope of the imported die is and prepend it
8934 to the name of the imported die. */
8935 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8937 if (imported_die
->tag
!= DW_TAG_namespace
8938 && imported_die
->tag
!= DW_TAG_module
)
8940 imported_declaration
= imported_name
;
8941 canonical_name
= imported_name_prefix
;
8943 else if (strlen (imported_name_prefix
) > 0)
8944 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8945 imported_name_prefix
,
8946 (cu
->language
== language_d
? "." : "::"),
8947 imported_name
, (char *) NULL
);
8949 canonical_name
= imported_name
;
8951 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8953 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8954 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8955 child_die
= sibling_die (child_die
))
8957 /* DWARF-4: A Fortran use statement with a “rename list” may be
8958 represented by an imported module entry with an import attribute
8959 referring to the module and owned entries corresponding to those
8960 entities that are renamed as part of being imported. */
8962 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8964 complaint (&symfile_complaints
,
8965 _("child DW_TAG_imported_declaration expected "
8966 "- DIE at 0x%x [in module %s]"),
8967 child_die
->offset
.sect_off
, objfile_name (objfile
));
8971 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8972 if (import_attr
== NULL
)
8974 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8975 dwarf_tag_name (child_die
->tag
));
8980 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8982 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8983 if (imported_name
== NULL
)
8985 complaint (&symfile_complaints
,
8986 _("child DW_TAG_imported_declaration has unknown "
8987 "imported name - DIE at 0x%x [in module %s]"),
8988 child_die
->offset
.sect_off
, objfile_name (objfile
));
8992 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8994 process_die (child_die
, cu
);
8997 cp_add_using_directive (import_prefix
,
9000 imported_declaration
,
9003 &objfile
->objfile_obstack
);
9005 do_cleanups (cleanups
);
9008 /* Cleanup function for handle_DW_AT_stmt_list. */
9011 free_cu_line_header (void *arg
)
9013 struct dwarf2_cu
*cu
= arg
;
9015 free_line_header (cu
->line_header
);
9016 cu
->line_header
= NULL
;
9019 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9020 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9021 this, it was first present in GCC release 4.3.0. */
9024 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9026 if (!cu
->checked_producer
)
9027 check_producer (cu
);
9029 return cu
->producer_is_gcc_lt_4_3
;
9033 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9034 const char **name
, const char **comp_dir
)
9036 struct attribute
*attr
;
9041 /* Find the filename. Do not use dwarf2_name here, since the filename
9042 is not a source language identifier. */
9043 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9046 *name
= DW_STRING (attr
);
9049 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9051 *comp_dir
= DW_STRING (attr
);
9052 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9053 && IS_ABSOLUTE_PATH (*name
))
9055 char *d
= ldirname (*name
);
9059 make_cleanup (xfree
, d
);
9061 if (*comp_dir
!= NULL
)
9063 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9064 directory, get rid of it. */
9065 char *cp
= strchr (*comp_dir
, ':');
9067 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9072 *name
= "<unknown>";
9075 /* Handle DW_AT_stmt_list for a compilation unit.
9076 DIE is the DW_TAG_compile_unit die for CU.
9077 COMP_DIR is the compilation directory. LOWPC is passed to
9078 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9081 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9082 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9084 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9085 struct attribute
*attr
;
9086 unsigned int line_offset
;
9087 struct line_header line_header_local
;
9088 hashval_t line_header_local_hash
;
9093 gdb_assert (! cu
->per_cu
->is_debug_types
);
9095 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9099 line_offset
= DW_UNSND (attr
);
9101 /* The line header hash table is only created if needed (it exists to
9102 prevent redundant reading of the line table for partial_units).
9103 If we're given a partial_unit, we'll need it. If we're given a
9104 compile_unit, then use the line header hash table if it's already
9105 created, but don't create one just yet. */
9107 if (dwarf2_per_objfile
->line_header_hash
== NULL
9108 && die
->tag
== DW_TAG_partial_unit
)
9110 dwarf2_per_objfile
->line_header_hash
9111 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9112 line_header_eq_voidp
,
9113 free_line_header_voidp
,
9114 &objfile
->objfile_obstack
,
9115 hashtab_obstack_allocate
,
9116 dummy_obstack_deallocate
);
9119 line_header_local
.offset
.sect_off
= line_offset
;
9120 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9121 line_header_local_hash
= line_header_hash (&line_header_local
);
9122 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9124 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9126 line_header_local_hash
, NO_INSERT
);
9128 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9129 is not present in *SLOT (since if there is something in *SLOT then
9130 it will be for a partial_unit). */
9131 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9133 gdb_assert (*slot
!= NULL
);
9134 cu
->line_header
= *slot
;
9139 /* dwarf_decode_line_header does not yet provide sufficient information.
9140 We always have to call also dwarf_decode_lines for it. */
9141 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9142 if (cu
->line_header
== NULL
)
9145 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9149 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9151 line_header_local_hash
, INSERT
);
9152 gdb_assert (slot
!= NULL
);
9154 if (slot
!= NULL
&& *slot
== NULL
)
9156 /* This newly decoded line number information unit will be owned
9157 by line_header_hash hash table. */
9158 *slot
= cu
->line_header
;
9162 /* We cannot free any current entry in (*slot) as that struct line_header
9163 may be already used by multiple CUs. Create only temporary decoded
9164 line_header for this CU - it may happen at most once for each line
9165 number information unit. And if we're not using line_header_hash
9166 then this is what we want as well. */
9167 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9168 make_cleanup (free_cu_line_header
, cu
);
9170 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9171 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9175 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9178 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9180 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9181 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9182 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9183 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9184 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9185 struct attribute
*attr
;
9186 const char *name
= NULL
;
9187 const char *comp_dir
= NULL
;
9188 struct die_info
*child_die
;
9189 bfd
*abfd
= objfile
->obfd
;
9192 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9194 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9196 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9197 from finish_block. */
9198 if (lowpc
== ((CORE_ADDR
) -1))
9200 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9202 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9204 prepare_one_comp_unit (cu
, die
, cu
->language
);
9206 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9207 standardised yet. As a workaround for the language detection we fall
9208 back to the DW_AT_producer string. */
9209 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9210 cu
->language
= language_opencl
;
9212 /* Similar hack for Go. */
9213 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9214 set_cu_language (DW_LANG_Go
, cu
);
9216 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9218 /* Decode line number information if present. We do this before
9219 processing child DIEs, so that the line header table is available
9220 for DW_AT_decl_file. */
9221 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9223 /* Process all dies in compilation unit. */
9224 if (die
->child
!= NULL
)
9226 child_die
= die
->child
;
9227 while (child_die
&& child_die
->tag
)
9229 process_die (child_die
, cu
);
9230 child_die
= sibling_die (child_die
);
9234 /* Decode macro information, if present. Dwarf 2 macro information
9235 refers to information in the line number info statement program
9236 header, so we can only read it if we've read the header
9238 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9239 if (attr
&& cu
->line_header
)
9241 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9242 complaint (&symfile_complaints
,
9243 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9245 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9249 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9250 if (attr
&& cu
->line_header
)
9252 unsigned int macro_offset
= DW_UNSND (attr
);
9254 dwarf_decode_macros (cu
, macro_offset
, 0);
9258 do_cleanups (back_to
);
9261 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9262 Create the set of symtabs used by this TU, or if this TU is sharing
9263 symtabs with another TU and the symtabs have already been created
9264 then restore those symtabs in the line header.
9265 We don't need the pc/line-number mapping for type units. */
9268 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9270 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9271 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9272 struct type_unit_group
*tu_group
;
9274 struct line_header
*lh
;
9275 struct attribute
*attr
;
9276 unsigned int i
, line_offset
;
9277 struct signatured_type
*sig_type
;
9279 gdb_assert (per_cu
->is_debug_types
);
9280 sig_type
= (struct signatured_type
*) per_cu
;
9282 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9284 /* If we're using .gdb_index (includes -readnow) then
9285 per_cu->type_unit_group may not have been set up yet. */
9286 if (sig_type
->type_unit_group
== NULL
)
9287 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9288 tu_group
= sig_type
->type_unit_group
;
9290 /* If we've already processed this stmt_list there's no real need to
9291 do it again, we could fake it and just recreate the part we need
9292 (file name,index -> symtab mapping). If data shows this optimization
9293 is useful we can do it then. */
9294 first_time
= tu_group
->compunit_symtab
== NULL
;
9296 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9301 line_offset
= DW_UNSND (attr
);
9302 lh
= dwarf_decode_line_header (line_offset
, cu
);
9307 dwarf2_start_symtab (cu
, "", NULL
, 0);
9310 gdb_assert (tu_group
->symtabs
== NULL
);
9311 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9316 cu
->line_header
= lh
;
9317 make_cleanup (free_cu_line_header
, cu
);
9321 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9323 tu_group
->num_symtabs
= lh
->num_file_names
;
9324 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9326 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9328 const char *dir
= NULL
;
9329 struct file_entry
*fe
= &lh
->file_names
[i
];
9331 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9332 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9333 dwarf2_start_subfile (fe
->name
, dir
);
9335 if (current_subfile
->symtab
== NULL
)
9337 /* NOTE: start_subfile will recognize when it's been passed
9338 a file it has already seen. So we can't assume there's a
9339 simple mapping from lh->file_names to subfiles, plus
9340 lh->file_names may contain dups. */
9341 current_subfile
->symtab
9342 = allocate_symtab (cust
, current_subfile
->name
);
9345 fe
->symtab
= current_subfile
->symtab
;
9346 tu_group
->symtabs
[i
] = fe
->symtab
;
9351 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9353 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9355 struct file_entry
*fe
= &lh
->file_names
[i
];
9357 fe
->symtab
= tu_group
->symtabs
[i
];
9361 /* The main symtab is allocated last. Type units don't have DW_AT_name
9362 so they don't have a "real" (so to speak) symtab anyway.
9363 There is later code that will assign the main symtab to all symbols
9364 that don't have one. We need to handle the case of a symbol with a
9365 missing symtab (DW_AT_decl_file) anyway. */
9368 /* Process DW_TAG_type_unit.
9369 For TUs we want to skip the first top level sibling if it's not the
9370 actual type being defined by this TU. In this case the first top
9371 level sibling is there to provide context only. */
9374 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9376 struct die_info
*child_die
;
9378 prepare_one_comp_unit (cu
, die
, language_minimal
);
9380 /* Initialize (or reinitialize) the machinery for building symtabs.
9381 We do this before processing child DIEs, so that the line header table
9382 is available for DW_AT_decl_file. */
9383 setup_type_unit_groups (die
, cu
);
9385 if (die
->child
!= NULL
)
9387 child_die
= die
->child
;
9388 while (child_die
&& child_die
->tag
)
9390 process_die (child_die
, cu
);
9391 child_die
= sibling_die (child_die
);
9398 http://gcc.gnu.org/wiki/DebugFission
9399 http://gcc.gnu.org/wiki/DebugFissionDWP
9401 To simplify handling of both DWO files ("object" files with the DWARF info)
9402 and DWP files (a file with the DWOs packaged up into one file), we treat
9403 DWP files as having a collection of virtual DWO files. */
9406 hash_dwo_file (const void *item
)
9408 const struct dwo_file
*dwo_file
= item
;
9411 hash
= htab_hash_string (dwo_file
->dwo_name
);
9412 if (dwo_file
->comp_dir
!= NULL
)
9413 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9418 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9420 const struct dwo_file
*lhs
= item_lhs
;
9421 const struct dwo_file
*rhs
= item_rhs
;
9423 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9425 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9426 return lhs
->comp_dir
== rhs
->comp_dir
;
9427 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9430 /* Allocate a hash table for DWO files. */
9433 allocate_dwo_file_hash_table (void)
9435 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9437 return htab_create_alloc_ex (41,
9441 &objfile
->objfile_obstack
,
9442 hashtab_obstack_allocate
,
9443 dummy_obstack_deallocate
);
9446 /* Lookup DWO file DWO_NAME. */
9449 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9451 struct dwo_file find_entry
;
9454 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9455 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9457 memset (&find_entry
, 0, sizeof (find_entry
));
9458 find_entry
.dwo_name
= dwo_name
;
9459 find_entry
.comp_dir
= comp_dir
;
9460 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9466 hash_dwo_unit (const void *item
)
9468 const struct dwo_unit
*dwo_unit
= item
;
9470 /* This drops the top 32 bits of the id, but is ok for a hash. */
9471 return dwo_unit
->signature
;
9475 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9477 const struct dwo_unit
*lhs
= item_lhs
;
9478 const struct dwo_unit
*rhs
= item_rhs
;
9480 /* The signature is assumed to be unique within the DWO file.
9481 So while object file CU dwo_id's always have the value zero,
9482 that's OK, assuming each object file DWO file has only one CU,
9483 and that's the rule for now. */
9484 return lhs
->signature
== rhs
->signature
;
9487 /* Allocate a hash table for DWO CUs,TUs.
9488 There is one of these tables for each of CUs,TUs for each DWO file. */
9491 allocate_dwo_unit_table (struct objfile
*objfile
)
9493 /* Start out with a pretty small number.
9494 Generally DWO files contain only one CU and maybe some TUs. */
9495 return htab_create_alloc_ex (3,
9499 &objfile
->objfile_obstack
,
9500 hashtab_obstack_allocate
,
9501 dummy_obstack_deallocate
);
9504 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9506 struct create_dwo_cu_data
9508 struct dwo_file
*dwo_file
;
9509 struct dwo_unit dwo_unit
;
9512 /* die_reader_func for create_dwo_cu. */
9515 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9516 const gdb_byte
*info_ptr
,
9517 struct die_info
*comp_unit_die
,
9521 struct dwarf2_cu
*cu
= reader
->cu
;
9522 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9523 sect_offset offset
= cu
->per_cu
->offset
;
9524 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9525 struct create_dwo_cu_data
*data
= datap
;
9526 struct dwo_file
*dwo_file
= data
->dwo_file
;
9527 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9528 struct attribute
*attr
;
9530 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9533 complaint (&symfile_complaints
,
9534 _("Dwarf Error: debug entry at offset 0x%x is missing"
9535 " its dwo_id [in module %s]"),
9536 offset
.sect_off
, dwo_file
->dwo_name
);
9540 dwo_unit
->dwo_file
= dwo_file
;
9541 dwo_unit
->signature
= DW_UNSND (attr
);
9542 dwo_unit
->section
= section
;
9543 dwo_unit
->offset
= offset
;
9544 dwo_unit
->length
= cu
->per_cu
->length
;
9546 if (dwarf_read_debug
)
9547 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9548 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9551 /* Create the dwo_unit for the lone CU in DWO_FILE.
9552 Note: This function processes DWO files only, not DWP files. */
9554 static struct dwo_unit
*
9555 create_dwo_cu (struct dwo_file
*dwo_file
)
9557 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9558 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9561 const gdb_byte
*info_ptr
, *end_ptr
;
9562 struct create_dwo_cu_data create_dwo_cu_data
;
9563 struct dwo_unit
*dwo_unit
;
9565 dwarf2_read_section (objfile
, section
);
9566 info_ptr
= section
->buffer
;
9568 if (info_ptr
== NULL
)
9571 /* We can't set abfd until now because the section may be empty or
9572 not present, in which case section->asection will be NULL. */
9573 abfd
= get_section_bfd_owner (section
);
9575 if (dwarf_read_debug
)
9577 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9578 get_section_name (section
),
9579 get_section_file_name (section
));
9582 create_dwo_cu_data
.dwo_file
= dwo_file
;
9585 end_ptr
= info_ptr
+ section
->size
;
9586 while (info_ptr
< end_ptr
)
9588 struct dwarf2_per_cu_data per_cu
;
9590 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9591 sizeof (create_dwo_cu_data
.dwo_unit
));
9592 memset (&per_cu
, 0, sizeof (per_cu
));
9593 per_cu
.objfile
= objfile
;
9594 per_cu
.is_debug_types
= 0;
9595 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9596 per_cu
.section
= section
;
9598 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9599 create_dwo_cu_reader
,
9600 &create_dwo_cu_data
);
9602 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9604 /* If we've already found one, complain. We only support one
9605 because having more than one requires hacking the dwo_name of
9606 each to match, which is highly unlikely to happen. */
9607 if (dwo_unit
!= NULL
)
9609 complaint (&symfile_complaints
,
9610 _("Multiple CUs in DWO file %s [in module %s]"),
9611 dwo_file
->dwo_name
, objfile_name (objfile
));
9615 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9616 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9619 info_ptr
+= per_cu
.length
;
9625 /* DWP file .debug_{cu,tu}_index section format:
9626 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9630 Both index sections have the same format, and serve to map a 64-bit
9631 signature to a set of section numbers. Each section begins with a header,
9632 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9633 indexes, and a pool of 32-bit section numbers. The index sections will be
9634 aligned at 8-byte boundaries in the file.
9636 The index section header consists of:
9638 V, 32 bit version number
9640 N, 32 bit number of compilation units or type units in the index
9641 M, 32 bit number of slots in the hash table
9643 Numbers are recorded using the byte order of the application binary.
9645 The hash table begins at offset 16 in the section, and consists of an array
9646 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9647 order of the application binary). Unused slots in the hash table are 0.
9648 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9650 The parallel table begins immediately after the hash table
9651 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9652 array of 32-bit indexes (using the byte order of the application binary),
9653 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9654 table contains a 32-bit index into the pool of section numbers. For unused
9655 hash table slots, the corresponding entry in the parallel table will be 0.
9657 The pool of section numbers begins immediately following the hash table
9658 (at offset 16 + 12 * M from the beginning of the section). The pool of
9659 section numbers consists of an array of 32-bit words (using the byte order
9660 of the application binary). Each item in the array is indexed starting
9661 from 0. The hash table entry provides the index of the first section
9662 number in the set. Additional section numbers in the set follow, and the
9663 set is terminated by a 0 entry (section number 0 is not used in ELF).
9665 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9666 section must be the first entry in the set, and the .debug_abbrev.dwo must
9667 be the second entry. Other members of the set may follow in any order.
9673 DWP Version 2 combines all the .debug_info, etc. sections into one,
9674 and the entries in the index tables are now offsets into these sections.
9675 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9678 Index Section Contents:
9680 Hash Table of Signatures dwp_hash_table.hash_table
9681 Parallel Table of Indices dwp_hash_table.unit_table
9682 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9683 Table of Section Sizes dwp_hash_table.v2.sizes
9685 The index section header consists of:
9687 V, 32 bit version number
9688 L, 32 bit number of columns in the table of section offsets
9689 N, 32 bit number of compilation units or type units in the index
9690 M, 32 bit number of slots in the hash table
9692 Numbers are recorded using the byte order of the application binary.
9694 The hash table has the same format as version 1.
9695 The parallel table of indices has the same format as version 1,
9696 except that the entries are origin-1 indices into the table of sections
9697 offsets and the table of section sizes.
9699 The table of offsets begins immediately following the parallel table
9700 (at offset 16 + 12 * M from the beginning of the section). The table is
9701 a two-dimensional array of 32-bit words (using the byte order of the
9702 application binary), with L columns and N+1 rows, in row-major order.
9703 Each row in the array is indexed starting from 0. The first row provides
9704 a key to the remaining rows: each column in this row provides an identifier
9705 for a debug section, and the offsets in the same column of subsequent rows
9706 refer to that section. The section identifiers are:
9708 DW_SECT_INFO 1 .debug_info.dwo
9709 DW_SECT_TYPES 2 .debug_types.dwo
9710 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9711 DW_SECT_LINE 4 .debug_line.dwo
9712 DW_SECT_LOC 5 .debug_loc.dwo
9713 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9714 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9715 DW_SECT_MACRO 8 .debug_macro.dwo
9717 The offsets provided by the CU and TU index sections are the base offsets
9718 for the contributions made by each CU or TU to the corresponding section
9719 in the package file. Each CU and TU header contains an abbrev_offset
9720 field, used to find the abbreviations table for that CU or TU within the
9721 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9722 be interpreted as relative to the base offset given in the index section.
9723 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9724 should be interpreted as relative to the base offset for .debug_line.dwo,
9725 and offsets into other debug sections obtained from DWARF attributes should
9726 also be interpreted as relative to the corresponding base offset.
9728 The table of sizes begins immediately following the table of offsets.
9729 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9730 with L columns and N rows, in row-major order. Each row in the array is
9731 indexed starting from 1 (row 0 is shared by the two tables).
9735 Hash table lookup is handled the same in version 1 and 2:
9737 We assume that N and M will not exceed 2^32 - 1.
9738 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9740 Given a 64-bit compilation unit signature or a type signature S, an entry
9741 in the hash table is located as follows:
9743 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9744 the low-order k bits all set to 1.
9746 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9748 3) If the hash table entry at index H matches the signature, use that
9749 entry. If the hash table entry at index H is unused (all zeroes),
9750 terminate the search: the signature is not present in the table.
9752 4) Let H = (H + H') modulo M. Repeat at Step 3.
9754 Because M > N and H' and M are relatively prime, the search is guaranteed
9755 to stop at an unused slot or find the match. */
9757 /* Create a hash table to map DWO IDs to their CU/TU entry in
9758 .debug_{info,types}.dwo in DWP_FILE.
9759 Returns NULL if there isn't one.
9760 Note: This function processes DWP files only, not DWO files. */
9762 static struct dwp_hash_table
*
9763 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9765 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9766 bfd
*dbfd
= dwp_file
->dbfd
;
9767 const gdb_byte
*index_ptr
, *index_end
;
9768 struct dwarf2_section_info
*index
;
9769 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9770 struct dwp_hash_table
*htab
;
9773 index
= &dwp_file
->sections
.tu_index
;
9775 index
= &dwp_file
->sections
.cu_index
;
9777 if (dwarf2_section_empty_p (index
))
9779 dwarf2_read_section (objfile
, index
);
9781 index_ptr
= index
->buffer
;
9782 index_end
= index_ptr
+ index
->size
;
9784 version
= read_4_bytes (dbfd
, index_ptr
);
9787 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9791 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9793 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9796 if (version
!= 1 && version
!= 2)
9798 error (_("Dwarf Error: unsupported DWP file version (%s)"
9800 pulongest (version
), dwp_file
->name
);
9802 if (nr_slots
!= (nr_slots
& -nr_slots
))
9804 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9805 " is not power of 2 [in module %s]"),
9806 pulongest (nr_slots
), dwp_file
->name
);
9809 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9810 htab
->version
= version
;
9811 htab
->nr_columns
= nr_columns
;
9812 htab
->nr_units
= nr_units
;
9813 htab
->nr_slots
= nr_slots
;
9814 htab
->hash_table
= index_ptr
;
9815 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9817 /* Exit early if the table is empty. */
9818 if (nr_slots
== 0 || nr_units
== 0
9819 || (version
== 2 && nr_columns
== 0))
9821 /* All must be zero. */
9822 if (nr_slots
!= 0 || nr_units
!= 0
9823 || (version
== 2 && nr_columns
!= 0))
9825 complaint (&symfile_complaints
,
9826 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9827 " all zero [in modules %s]"),
9835 htab
->section_pool
.v1
.indices
=
9836 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9837 /* It's harder to decide whether the section is too small in v1.
9838 V1 is deprecated anyway so we punt. */
9842 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9843 int *ids
= htab
->section_pool
.v2
.section_ids
;
9844 /* Reverse map for error checking. */
9845 int ids_seen
[DW_SECT_MAX
+ 1];
9850 error (_("Dwarf Error: bad DWP hash table, too few columns"
9851 " in section table [in module %s]"),
9854 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9856 error (_("Dwarf Error: bad DWP hash table, too many columns"
9857 " in section table [in module %s]"),
9860 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9861 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9862 for (i
= 0; i
< nr_columns
; ++i
)
9864 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9866 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9868 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9869 " in section table [in module %s]"),
9870 id
, dwp_file
->name
);
9872 if (ids_seen
[id
] != -1)
9874 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9875 " id %d in section table [in module %s]"),
9876 id
, dwp_file
->name
);
9881 /* Must have exactly one info or types section. */
9882 if (((ids_seen
[DW_SECT_INFO
] != -1)
9883 + (ids_seen
[DW_SECT_TYPES
] != -1))
9886 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9887 " DWO info/types section [in module %s]"),
9890 /* Must have an abbrev section. */
9891 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9893 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9894 " section [in module %s]"),
9897 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9898 htab
->section_pool
.v2
.sizes
=
9899 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9900 * nr_units
* nr_columns
);
9901 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9902 * nr_units
* nr_columns
))
9905 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9914 /* Update SECTIONS with the data from SECTP.
9916 This function is like the other "locate" section routines that are
9917 passed to bfd_map_over_sections, but in this context the sections to
9918 read comes from the DWP V1 hash table, not the full ELF section table.
9920 The result is non-zero for success, or zero if an error was found. */
9923 locate_v1_virtual_dwo_sections (asection
*sectp
,
9924 struct virtual_v1_dwo_sections
*sections
)
9926 const struct dwop_section_names
*names
= &dwop_section_names
;
9928 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9930 /* There can be only one. */
9931 if (sections
->abbrev
.s
.asection
!= NULL
)
9933 sections
->abbrev
.s
.asection
= sectp
;
9934 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9936 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9937 || section_is_p (sectp
->name
, &names
->types_dwo
))
9939 /* There can be only one. */
9940 if (sections
->info_or_types
.s
.asection
!= NULL
)
9942 sections
->info_or_types
.s
.asection
= sectp
;
9943 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9945 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9947 /* There can be only one. */
9948 if (sections
->line
.s
.asection
!= NULL
)
9950 sections
->line
.s
.asection
= sectp
;
9951 sections
->line
.size
= bfd_get_section_size (sectp
);
9953 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9955 /* There can be only one. */
9956 if (sections
->loc
.s
.asection
!= NULL
)
9958 sections
->loc
.s
.asection
= sectp
;
9959 sections
->loc
.size
= bfd_get_section_size (sectp
);
9961 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9963 /* There can be only one. */
9964 if (sections
->macinfo
.s
.asection
!= NULL
)
9966 sections
->macinfo
.s
.asection
= sectp
;
9967 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9969 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9971 /* There can be only one. */
9972 if (sections
->macro
.s
.asection
!= NULL
)
9974 sections
->macro
.s
.asection
= sectp
;
9975 sections
->macro
.size
= bfd_get_section_size (sectp
);
9977 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9979 /* There can be only one. */
9980 if (sections
->str_offsets
.s
.asection
!= NULL
)
9982 sections
->str_offsets
.s
.asection
= sectp
;
9983 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9987 /* No other kind of section is valid. */
9994 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9995 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9996 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9997 This is for DWP version 1 files. */
9999 static struct dwo_unit
*
10000 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10001 uint32_t unit_index
,
10002 const char *comp_dir
,
10003 ULONGEST signature
, int is_debug_types
)
10005 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10006 const struct dwp_hash_table
*dwp_htab
=
10007 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10008 bfd
*dbfd
= dwp_file
->dbfd
;
10009 const char *kind
= is_debug_types
? "TU" : "CU";
10010 struct dwo_file
*dwo_file
;
10011 struct dwo_unit
*dwo_unit
;
10012 struct virtual_v1_dwo_sections sections
;
10013 void **dwo_file_slot
;
10014 char *virtual_dwo_name
;
10015 struct dwarf2_section_info
*cutu
;
10016 struct cleanup
*cleanups
;
10019 gdb_assert (dwp_file
->version
== 1);
10021 if (dwarf_read_debug
)
10023 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10025 pulongest (unit_index
), hex_string (signature
),
10029 /* Fetch the sections of this DWO unit.
10030 Put a limit on the number of sections we look for so that bad data
10031 doesn't cause us to loop forever. */
10033 #define MAX_NR_V1_DWO_SECTIONS \
10034 (1 /* .debug_info or .debug_types */ \
10035 + 1 /* .debug_abbrev */ \
10036 + 1 /* .debug_line */ \
10037 + 1 /* .debug_loc */ \
10038 + 1 /* .debug_str_offsets */ \
10039 + 1 /* .debug_macro or .debug_macinfo */ \
10040 + 1 /* trailing zero */)
10042 memset (§ions
, 0, sizeof (sections
));
10043 cleanups
= make_cleanup (null_cleanup
, 0);
10045 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10048 uint32_t section_nr
=
10049 read_4_bytes (dbfd
,
10050 dwp_htab
->section_pool
.v1
.indices
10051 + (unit_index
+ i
) * sizeof (uint32_t));
10053 if (section_nr
== 0)
10055 if (section_nr
>= dwp_file
->num_sections
)
10057 error (_("Dwarf Error: bad DWP hash table, section number too large"
10058 " [in module %s]"),
10062 sectp
= dwp_file
->elf_sections
[section_nr
];
10063 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10065 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10066 " [in module %s]"),
10072 || dwarf2_section_empty_p (§ions
.info_or_types
)
10073 || dwarf2_section_empty_p (§ions
.abbrev
))
10075 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10076 " [in module %s]"),
10079 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10081 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10082 " [in module %s]"),
10086 /* It's easier for the rest of the code if we fake a struct dwo_file and
10087 have dwo_unit "live" in that. At least for now.
10089 The DWP file can be made up of a random collection of CUs and TUs.
10090 However, for each CU + set of TUs that came from the same original DWO
10091 file, we can combine them back into a virtual DWO file to save space
10092 (fewer struct dwo_file objects to allocate). Remember that for really
10093 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10096 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10097 get_section_id (§ions
.abbrev
),
10098 get_section_id (§ions
.line
),
10099 get_section_id (§ions
.loc
),
10100 get_section_id (§ions
.str_offsets
));
10101 make_cleanup (xfree
, virtual_dwo_name
);
10102 /* Can we use an existing virtual DWO file? */
10103 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10104 /* Create one if necessary. */
10105 if (*dwo_file_slot
== NULL
)
10107 if (dwarf_read_debug
)
10109 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10112 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10113 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10115 strlen (virtual_dwo_name
));
10116 dwo_file
->comp_dir
= comp_dir
;
10117 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10118 dwo_file
->sections
.line
= sections
.line
;
10119 dwo_file
->sections
.loc
= sections
.loc
;
10120 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10121 dwo_file
->sections
.macro
= sections
.macro
;
10122 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10123 /* The "str" section is global to the entire DWP file. */
10124 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10125 /* The info or types section is assigned below to dwo_unit,
10126 there's no need to record it in dwo_file.
10127 Also, we can't simply record type sections in dwo_file because
10128 we record a pointer into the vector in dwo_unit. As we collect more
10129 types we'll grow the vector and eventually have to reallocate space
10130 for it, invalidating all copies of pointers into the previous
10132 *dwo_file_slot
= dwo_file
;
10136 if (dwarf_read_debug
)
10138 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10141 dwo_file
= *dwo_file_slot
;
10143 do_cleanups (cleanups
);
10145 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10146 dwo_unit
->dwo_file
= dwo_file
;
10147 dwo_unit
->signature
= signature
;
10148 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10149 sizeof (struct dwarf2_section_info
));
10150 *dwo_unit
->section
= sections
.info_or_types
;
10151 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10156 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10157 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10158 piece within that section used by a TU/CU, return a virtual section
10159 of just that piece. */
10161 static struct dwarf2_section_info
10162 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10163 bfd_size_type offset
, bfd_size_type size
)
10165 struct dwarf2_section_info result
;
10168 gdb_assert (section
!= NULL
);
10169 gdb_assert (!section
->is_virtual
);
10171 memset (&result
, 0, sizeof (result
));
10172 result
.s
.containing_section
= section
;
10173 result
.is_virtual
= 1;
10178 sectp
= get_section_bfd_section (section
);
10180 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10181 bounds of the real section. This is a pretty-rare event, so just
10182 flag an error (easier) instead of a warning and trying to cope. */
10184 || offset
+ size
> bfd_get_section_size (sectp
))
10186 bfd
*abfd
= sectp
->owner
;
10188 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10189 " in section %s [in module %s]"),
10190 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10191 objfile_name (dwarf2_per_objfile
->objfile
));
10194 result
.virtual_offset
= offset
;
10195 result
.size
= size
;
10199 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10200 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10201 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10202 This is for DWP version 2 files. */
10204 static struct dwo_unit
*
10205 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10206 uint32_t unit_index
,
10207 const char *comp_dir
,
10208 ULONGEST signature
, int is_debug_types
)
10210 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10211 const struct dwp_hash_table
*dwp_htab
=
10212 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10213 bfd
*dbfd
= dwp_file
->dbfd
;
10214 const char *kind
= is_debug_types
? "TU" : "CU";
10215 struct dwo_file
*dwo_file
;
10216 struct dwo_unit
*dwo_unit
;
10217 struct virtual_v2_dwo_sections sections
;
10218 void **dwo_file_slot
;
10219 char *virtual_dwo_name
;
10220 struct dwarf2_section_info
*cutu
;
10221 struct cleanup
*cleanups
;
10224 gdb_assert (dwp_file
->version
== 2);
10226 if (dwarf_read_debug
)
10228 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10230 pulongest (unit_index
), hex_string (signature
),
10234 /* Fetch the section offsets of this DWO unit. */
10236 memset (§ions
, 0, sizeof (sections
));
10237 cleanups
= make_cleanup (null_cleanup
, 0);
10239 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10241 uint32_t offset
= read_4_bytes (dbfd
,
10242 dwp_htab
->section_pool
.v2
.offsets
10243 + (((unit_index
- 1) * dwp_htab
->nr_columns
10245 * sizeof (uint32_t)));
10246 uint32_t size
= read_4_bytes (dbfd
,
10247 dwp_htab
->section_pool
.v2
.sizes
10248 + (((unit_index
- 1) * dwp_htab
->nr_columns
10250 * sizeof (uint32_t)));
10252 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10255 case DW_SECT_TYPES
:
10256 sections
.info_or_types_offset
= offset
;
10257 sections
.info_or_types_size
= size
;
10259 case DW_SECT_ABBREV
:
10260 sections
.abbrev_offset
= offset
;
10261 sections
.abbrev_size
= size
;
10264 sections
.line_offset
= offset
;
10265 sections
.line_size
= size
;
10268 sections
.loc_offset
= offset
;
10269 sections
.loc_size
= size
;
10271 case DW_SECT_STR_OFFSETS
:
10272 sections
.str_offsets_offset
= offset
;
10273 sections
.str_offsets_size
= size
;
10275 case DW_SECT_MACINFO
:
10276 sections
.macinfo_offset
= offset
;
10277 sections
.macinfo_size
= size
;
10279 case DW_SECT_MACRO
:
10280 sections
.macro_offset
= offset
;
10281 sections
.macro_size
= size
;
10286 /* It's easier for the rest of the code if we fake a struct dwo_file and
10287 have dwo_unit "live" in that. At least for now.
10289 The DWP file can be made up of a random collection of CUs and TUs.
10290 However, for each CU + set of TUs that came from the same original DWO
10291 file, we can combine them back into a virtual DWO file to save space
10292 (fewer struct dwo_file objects to allocate). Remember that for really
10293 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10296 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10297 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10298 (long) (sections
.line_size
? sections
.line_offset
: 0),
10299 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10300 (long) (sections
.str_offsets_size
10301 ? sections
.str_offsets_offset
: 0));
10302 make_cleanup (xfree
, virtual_dwo_name
);
10303 /* Can we use an existing virtual DWO file? */
10304 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10305 /* Create one if necessary. */
10306 if (*dwo_file_slot
== NULL
)
10308 if (dwarf_read_debug
)
10310 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10313 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10314 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10316 strlen (virtual_dwo_name
));
10317 dwo_file
->comp_dir
= comp_dir
;
10318 dwo_file
->sections
.abbrev
=
10319 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10320 sections
.abbrev_offset
, sections
.abbrev_size
);
10321 dwo_file
->sections
.line
=
10322 create_dwp_v2_section (&dwp_file
->sections
.line
,
10323 sections
.line_offset
, sections
.line_size
);
10324 dwo_file
->sections
.loc
=
10325 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10326 sections
.loc_offset
, sections
.loc_size
);
10327 dwo_file
->sections
.macinfo
=
10328 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10329 sections
.macinfo_offset
, sections
.macinfo_size
);
10330 dwo_file
->sections
.macro
=
10331 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10332 sections
.macro_offset
, sections
.macro_size
);
10333 dwo_file
->sections
.str_offsets
=
10334 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10335 sections
.str_offsets_offset
,
10336 sections
.str_offsets_size
);
10337 /* The "str" section is global to the entire DWP file. */
10338 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10339 /* The info or types section is assigned below to dwo_unit,
10340 there's no need to record it in dwo_file.
10341 Also, we can't simply record type sections in dwo_file because
10342 we record a pointer into the vector in dwo_unit. As we collect more
10343 types we'll grow the vector and eventually have to reallocate space
10344 for it, invalidating all copies of pointers into the previous
10346 *dwo_file_slot
= dwo_file
;
10350 if (dwarf_read_debug
)
10352 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10355 dwo_file
= *dwo_file_slot
;
10357 do_cleanups (cleanups
);
10359 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10360 dwo_unit
->dwo_file
= dwo_file
;
10361 dwo_unit
->signature
= signature
;
10362 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10363 sizeof (struct dwarf2_section_info
));
10364 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10365 ? &dwp_file
->sections
.types
10366 : &dwp_file
->sections
.info
,
10367 sections
.info_or_types_offset
,
10368 sections
.info_or_types_size
);
10369 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10374 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10375 Returns NULL if the signature isn't found. */
10377 static struct dwo_unit
*
10378 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10379 ULONGEST signature
, int is_debug_types
)
10381 const struct dwp_hash_table
*dwp_htab
=
10382 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10383 bfd
*dbfd
= dwp_file
->dbfd
;
10384 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10385 uint32_t hash
= signature
& mask
;
10386 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10389 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10391 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10392 find_dwo_cu
.signature
= signature
;
10393 slot
= htab_find_slot (is_debug_types
10394 ? dwp_file
->loaded_tus
10395 : dwp_file
->loaded_cus
,
10396 &find_dwo_cu
, INSERT
);
10401 /* Use a for loop so that we don't loop forever on bad debug info. */
10402 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10404 ULONGEST signature_in_table
;
10406 signature_in_table
=
10407 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10408 if (signature_in_table
== signature
)
10410 uint32_t unit_index
=
10411 read_4_bytes (dbfd
,
10412 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10414 if (dwp_file
->version
== 1)
10416 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10417 comp_dir
, signature
,
10422 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10423 comp_dir
, signature
,
10428 if (signature_in_table
== 0)
10430 hash
= (hash
+ hash2
) & mask
;
10433 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10434 " [in module %s]"),
10438 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10439 Open the file specified by FILE_NAME and hand it off to BFD for
10440 preliminary analysis. Return a newly initialized bfd *, which
10441 includes a canonicalized copy of FILE_NAME.
10442 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10443 SEARCH_CWD is true if the current directory is to be searched.
10444 It will be searched before debug-file-directory.
10445 If successful, the file is added to the bfd include table of the
10446 objfile's bfd (see gdb_bfd_record_inclusion).
10447 If unable to find/open the file, return NULL.
10448 NOTE: This function is derived from symfile_bfd_open. */
10451 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10455 char *absolute_name
;
10456 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10457 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10458 to debug_file_directory. */
10460 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10464 if (*debug_file_directory
!= '\0')
10465 search_path
= concat (".", dirname_separator_string
,
10466 debug_file_directory
, NULL
);
10468 search_path
= xstrdup (".");
10471 search_path
= xstrdup (debug_file_directory
);
10473 flags
= OPF_RETURN_REALPATH
;
10475 flags
|= OPF_SEARCH_IN_PATH
;
10476 desc
= openp (search_path
, flags
, file_name
,
10477 O_RDONLY
| O_BINARY
, &absolute_name
);
10478 xfree (search_path
);
10482 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10483 xfree (absolute_name
);
10484 if (sym_bfd
== NULL
)
10486 bfd_set_cacheable (sym_bfd
, 1);
10488 if (!bfd_check_format (sym_bfd
, bfd_object
))
10490 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10494 /* Success. Record the bfd as having been included by the objfile's bfd.
10495 This is important because things like demangled_names_hash lives in the
10496 objfile's per_bfd space and may have references to things like symbol
10497 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10498 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10503 /* Try to open DWO file FILE_NAME.
10504 COMP_DIR is the DW_AT_comp_dir attribute.
10505 The result is the bfd handle of the file.
10506 If there is a problem finding or opening the file, return NULL.
10507 Upon success, the canonicalized path of the file is stored in the bfd,
10508 same as symfile_bfd_open. */
10511 open_dwo_file (const char *file_name
, const char *comp_dir
)
10515 if (IS_ABSOLUTE_PATH (file_name
))
10516 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10518 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10520 if (comp_dir
!= NULL
)
10522 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10524 /* NOTE: If comp_dir is a relative path, this will also try the
10525 search path, which seems useful. */
10526 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10527 xfree (path_to_try
);
10532 /* That didn't work, try debug-file-directory, which, despite its name,
10533 is a list of paths. */
10535 if (*debug_file_directory
== '\0')
10538 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10541 /* This function is mapped across the sections and remembers the offset and
10542 size of each of the DWO debugging sections we are interested in. */
10545 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10547 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10548 const struct dwop_section_names
*names
= &dwop_section_names
;
10550 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10552 dwo_sections
->abbrev
.s
.asection
= sectp
;
10553 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10555 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10557 dwo_sections
->info
.s
.asection
= sectp
;
10558 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10560 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10562 dwo_sections
->line
.s
.asection
= sectp
;
10563 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10565 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10567 dwo_sections
->loc
.s
.asection
= sectp
;
10568 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10570 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10572 dwo_sections
->macinfo
.s
.asection
= sectp
;
10573 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10575 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10577 dwo_sections
->macro
.s
.asection
= sectp
;
10578 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10580 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10582 dwo_sections
->str
.s
.asection
= sectp
;
10583 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10585 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10587 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10588 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10590 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10592 struct dwarf2_section_info type_section
;
10594 memset (&type_section
, 0, sizeof (type_section
));
10595 type_section
.s
.asection
= sectp
;
10596 type_section
.size
= bfd_get_section_size (sectp
);
10597 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10602 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10603 by PER_CU. This is for the non-DWP case.
10604 The result is NULL if DWO_NAME can't be found. */
10606 static struct dwo_file
*
10607 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10608 const char *dwo_name
, const char *comp_dir
)
10610 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10611 struct dwo_file
*dwo_file
;
10613 struct cleanup
*cleanups
;
10615 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10618 if (dwarf_read_debug
)
10619 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10622 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10623 dwo_file
->dwo_name
= dwo_name
;
10624 dwo_file
->comp_dir
= comp_dir
;
10625 dwo_file
->dbfd
= dbfd
;
10627 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10629 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10631 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10633 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10634 dwo_file
->sections
.types
);
10636 discard_cleanups (cleanups
);
10638 if (dwarf_read_debug
)
10639 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10644 /* This function is mapped across the sections and remembers the offset and
10645 size of each of the DWP debugging sections common to version 1 and 2 that
10646 we are interested in. */
10649 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10650 void *dwp_file_ptr
)
10652 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10653 const struct dwop_section_names
*names
= &dwop_section_names
;
10654 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10656 /* Record the ELF section number for later lookup: this is what the
10657 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10658 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10659 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10661 /* Look for specific sections that we need. */
10662 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10664 dwp_file
->sections
.str
.s
.asection
= sectp
;
10665 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10667 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10669 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10670 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10672 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10674 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10675 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10679 /* This function is mapped across the sections and remembers the offset and
10680 size of each of the DWP version 2 debugging sections that we are interested
10681 in. This is split into a separate function because we don't know if we
10682 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10685 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10687 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10688 const struct dwop_section_names
*names
= &dwop_section_names
;
10689 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10691 /* Record the ELF section number for later lookup: this is what the
10692 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10693 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10694 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10696 /* Look for specific sections that we need. */
10697 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10699 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10700 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10702 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10704 dwp_file
->sections
.info
.s
.asection
= sectp
;
10705 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10707 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10709 dwp_file
->sections
.line
.s
.asection
= sectp
;
10710 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10712 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10714 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10715 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10717 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10719 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10720 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10722 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10724 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10725 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10727 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10729 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10730 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10732 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10734 dwp_file
->sections
.types
.s
.asection
= sectp
;
10735 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10739 /* Hash function for dwp_file loaded CUs/TUs. */
10742 hash_dwp_loaded_cutus (const void *item
)
10744 const struct dwo_unit
*dwo_unit
= item
;
10746 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10747 return dwo_unit
->signature
;
10750 /* Equality function for dwp_file loaded CUs/TUs. */
10753 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10755 const struct dwo_unit
*dua
= a
;
10756 const struct dwo_unit
*dub
= b
;
10758 return dua
->signature
== dub
->signature
;
10761 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10764 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10766 return htab_create_alloc_ex (3,
10767 hash_dwp_loaded_cutus
,
10768 eq_dwp_loaded_cutus
,
10770 &objfile
->objfile_obstack
,
10771 hashtab_obstack_allocate
,
10772 dummy_obstack_deallocate
);
10775 /* Try to open DWP file FILE_NAME.
10776 The result is the bfd handle of the file.
10777 If there is a problem finding or opening the file, return NULL.
10778 Upon success, the canonicalized path of the file is stored in the bfd,
10779 same as symfile_bfd_open. */
10782 open_dwp_file (const char *file_name
)
10786 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10790 /* Work around upstream bug 15652.
10791 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10792 [Whether that's a "bug" is debatable, but it is getting in our way.]
10793 We have no real idea where the dwp file is, because gdb's realpath-ing
10794 of the executable's path may have discarded the needed info.
10795 [IWBN if the dwp file name was recorded in the executable, akin to
10796 .gnu_debuglink, but that doesn't exist yet.]
10797 Strip the directory from FILE_NAME and search again. */
10798 if (*debug_file_directory
!= '\0')
10800 /* Don't implicitly search the current directory here.
10801 If the user wants to search "." to handle this case,
10802 it must be added to debug-file-directory. */
10803 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10810 /* Initialize the use of the DWP file for the current objfile.
10811 By convention the name of the DWP file is ${objfile}.dwp.
10812 The result is NULL if it can't be found. */
10814 static struct dwp_file
*
10815 open_and_init_dwp_file (void)
10817 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10818 struct dwp_file
*dwp_file
;
10821 struct cleanup
*cleanups
;
10823 /* Try to find first .dwp for the binary file before any symbolic links
10825 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10826 cleanups
= make_cleanup (xfree
, dwp_name
);
10828 dbfd
= open_dwp_file (dwp_name
);
10830 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10832 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10833 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10834 make_cleanup (xfree
, dwp_name
);
10835 dbfd
= open_dwp_file (dwp_name
);
10840 if (dwarf_read_debug
)
10841 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10842 do_cleanups (cleanups
);
10845 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10846 dwp_file
->name
= bfd_get_filename (dbfd
);
10847 dwp_file
->dbfd
= dbfd
;
10848 do_cleanups (cleanups
);
10850 /* +1: section 0 is unused */
10851 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10852 dwp_file
->elf_sections
=
10853 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10854 dwp_file
->num_sections
, asection
*);
10856 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10858 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10860 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10862 /* The DWP file version is stored in the hash table. Oh well. */
10863 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10865 /* Technically speaking, we should try to limp along, but this is
10866 pretty bizarre. We use pulongest here because that's the established
10867 portability solution (e.g, we cannot use %u for uint32_t). */
10868 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10869 " TU version %s [in DWP file %s]"),
10870 pulongest (dwp_file
->cus
->version
),
10871 pulongest (dwp_file
->tus
->version
), dwp_name
);
10873 dwp_file
->version
= dwp_file
->cus
->version
;
10875 if (dwp_file
->version
== 2)
10876 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10878 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10879 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10881 if (dwarf_read_debug
)
10883 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10884 fprintf_unfiltered (gdb_stdlog
,
10885 " %s CUs, %s TUs\n",
10886 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10887 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10893 /* Wrapper around open_and_init_dwp_file, only open it once. */
10895 static struct dwp_file
*
10896 get_dwp_file (void)
10898 if (! dwarf2_per_objfile
->dwp_checked
)
10900 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10901 dwarf2_per_objfile
->dwp_checked
= 1;
10903 return dwarf2_per_objfile
->dwp_file
;
10906 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10907 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10908 or in the DWP file for the objfile, referenced by THIS_UNIT.
10909 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10910 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10912 This is called, for example, when wanting to read a variable with a
10913 complex location. Therefore we don't want to do file i/o for every call.
10914 Therefore we don't want to look for a DWO file on every call.
10915 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10916 then we check if we've already seen DWO_NAME, and only THEN do we check
10919 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10920 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10922 static struct dwo_unit
*
10923 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10924 const char *dwo_name
, const char *comp_dir
,
10925 ULONGEST signature
, int is_debug_types
)
10927 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10928 const char *kind
= is_debug_types
? "TU" : "CU";
10929 void **dwo_file_slot
;
10930 struct dwo_file
*dwo_file
;
10931 struct dwp_file
*dwp_file
;
10933 /* First see if there's a DWP file.
10934 If we have a DWP file but didn't find the DWO inside it, don't
10935 look for the original DWO file. It makes gdb behave differently
10936 depending on whether one is debugging in the build tree. */
10938 dwp_file
= get_dwp_file ();
10939 if (dwp_file
!= NULL
)
10941 const struct dwp_hash_table
*dwp_htab
=
10942 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10944 if (dwp_htab
!= NULL
)
10946 struct dwo_unit
*dwo_cutu
=
10947 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10948 signature
, is_debug_types
);
10950 if (dwo_cutu
!= NULL
)
10952 if (dwarf_read_debug
)
10954 fprintf_unfiltered (gdb_stdlog
,
10955 "Virtual DWO %s %s found: @%s\n",
10956 kind
, hex_string (signature
),
10957 host_address_to_string (dwo_cutu
));
10965 /* No DWP file, look for the DWO file. */
10967 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10968 if (*dwo_file_slot
== NULL
)
10970 /* Read in the file and build a table of the CUs/TUs it contains. */
10971 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10973 /* NOTE: This will be NULL if unable to open the file. */
10974 dwo_file
= *dwo_file_slot
;
10976 if (dwo_file
!= NULL
)
10978 struct dwo_unit
*dwo_cutu
= NULL
;
10980 if (is_debug_types
&& dwo_file
->tus
)
10982 struct dwo_unit find_dwo_cutu
;
10984 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10985 find_dwo_cutu
.signature
= signature
;
10986 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10988 else if (!is_debug_types
&& dwo_file
->cu
)
10990 if (signature
== dwo_file
->cu
->signature
)
10991 dwo_cutu
= dwo_file
->cu
;
10994 if (dwo_cutu
!= NULL
)
10996 if (dwarf_read_debug
)
10998 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10999 kind
, dwo_name
, hex_string (signature
),
11000 host_address_to_string (dwo_cutu
));
11007 /* We didn't find it. This could mean a dwo_id mismatch, or
11008 someone deleted the DWO/DWP file, or the search path isn't set up
11009 correctly to find the file. */
11011 if (dwarf_read_debug
)
11013 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11014 kind
, dwo_name
, hex_string (signature
));
11017 /* This is a warning and not a complaint because it can be caused by
11018 pilot error (e.g., user accidentally deleting the DWO). */
11020 /* Print the name of the DWP file if we looked there, helps the user
11021 better diagnose the problem. */
11022 char *dwp_text
= NULL
;
11023 struct cleanup
*cleanups
;
11025 if (dwp_file
!= NULL
)
11026 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11027 cleanups
= make_cleanup (xfree
, dwp_text
);
11029 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11030 " [in module %s]"),
11031 kind
, dwo_name
, hex_string (signature
),
11032 dwp_text
!= NULL
? dwp_text
: "",
11033 this_unit
->is_debug_types
? "TU" : "CU",
11034 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11036 do_cleanups (cleanups
);
11041 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11042 See lookup_dwo_cutu_unit for details. */
11044 static struct dwo_unit
*
11045 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11046 const char *dwo_name
, const char *comp_dir
,
11047 ULONGEST signature
)
11049 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11052 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11053 See lookup_dwo_cutu_unit for details. */
11055 static struct dwo_unit
*
11056 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11057 const char *dwo_name
, const char *comp_dir
)
11059 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11062 /* Traversal function for queue_and_load_all_dwo_tus. */
11065 queue_and_load_dwo_tu (void **slot
, void *info
)
11067 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11068 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11069 ULONGEST signature
= dwo_unit
->signature
;
11070 struct signatured_type
*sig_type
=
11071 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11073 if (sig_type
!= NULL
)
11075 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11077 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11078 a real dependency of PER_CU on SIG_TYPE. That is detected later
11079 while processing PER_CU. */
11080 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11081 load_full_type_unit (sig_cu
);
11082 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11088 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11089 The DWO may have the only definition of the type, though it may not be
11090 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11091 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11094 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11096 struct dwo_unit
*dwo_unit
;
11097 struct dwo_file
*dwo_file
;
11099 gdb_assert (!per_cu
->is_debug_types
);
11100 gdb_assert (get_dwp_file () == NULL
);
11101 gdb_assert (per_cu
->cu
!= NULL
);
11103 dwo_unit
= per_cu
->cu
->dwo_unit
;
11104 gdb_assert (dwo_unit
!= NULL
);
11106 dwo_file
= dwo_unit
->dwo_file
;
11107 if (dwo_file
->tus
!= NULL
)
11108 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11111 /* Free all resources associated with DWO_FILE.
11112 Close the DWO file and munmap the sections.
11113 All memory should be on the objfile obstack. */
11116 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11119 struct dwarf2_section_info
*section
;
11121 /* Note: dbfd is NULL for virtual DWO files. */
11122 gdb_bfd_unref (dwo_file
->dbfd
);
11124 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11127 /* Wrapper for free_dwo_file for use in cleanups. */
11130 free_dwo_file_cleanup (void *arg
)
11132 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11133 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11135 free_dwo_file (dwo_file
, objfile
);
11138 /* Traversal function for free_dwo_files. */
11141 free_dwo_file_from_slot (void **slot
, void *info
)
11143 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11144 struct objfile
*objfile
= (struct objfile
*) info
;
11146 free_dwo_file (dwo_file
, objfile
);
11151 /* Free all resources associated with DWO_FILES. */
11154 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11156 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11159 /* Read in various DIEs. */
11161 /* qsort helper for inherit_abstract_dies. */
11164 unsigned_int_compar (const void *ap
, const void *bp
)
11166 unsigned int a
= *(unsigned int *) ap
;
11167 unsigned int b
= *(unsigned int *) bp
;
11169 return (a
> b
) - (b
> a
);
11172 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11173 Inherit only the children of the DW_AT_abstract_origin DIE not being
11174 already referenced by DW_AT_abstract_origin from the children of the
11178 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11180 struct die_info
*child_die
;
11181 unsigned die_children_count
;
11182 /* CU offsets which were referenced by children of the current DIE. */
11183 sect_offset
*offsets
;
11184 sect_offset
*offsets_end
, *offsetp
;
11185 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11186 struct die_info
*origin_die
;
11187 /* Iterator of the ORIGIN_DIE children. */
11188 struct die_info
*origin_child_die
;
11189 struct cleanup
*cleanups
;
11190 struct attribute
*attr
;
11191 struct dwarf2_cu
*origin_cu
;
11192 struct pending
**origin_previous_list_in_scope
;
11194 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11198 /* Note that following die references may follow to a die in a
11202 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11204 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11206 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11207 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11209 if (die
->tag
!= origin_die
->tag
11210 && !(die
->tag
== DW_TAG_inlined_subroutine
11211 && origin_die
->tag
== DW_TAG_subprogram
))
11212 complaint (&symfile_complaints
,
11213 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11214 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11216 child_die
= die
->child
;
11217 die_children_count
= 0;
11218 while (child_die
&& child_die
->tag
)
11220 child_die
= sibling_die (child_die
);
11221 die_children_count
++;
11223 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11224 cleanups
= make_cleanup (xfree
, offsets
);
11226 offsets_end
= offsets
;
11227 for (child_die
= die
->child
;
11228 child_die
&& child_die
->tag
;
11229 child_die
= sibling_die (child_die
))
11231 struct die_info
*child_origin_die
;
11232 struct dwarf2_cu
*child_origin_cu
;
11234 /* We are trying to process concrete instance entries:
11235 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11236 it's not relevant to our analysis here. i.e. detecting DIEs that are
11237 present in the abstract instance but not referenced in the concrete
11239 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11242 /* For each CHILD_DIE, find the corresponding child of
11243 ORIGIN_DIE. If there is more than one layer of
11244 DW_AT_abstract_origin, follow them all; there shouldn't be,
11245 but GCC versions at least through 4.4 generate this (GCC PR
11247 child_origin_die
= child_die
;
11248 child_origin_cu
= cu
;
11251 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11255 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11259 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11260 counterpart may exist. */
11261 if (child_origin_die
!= child_die
)
11263 if (child_die
->tag
!= child_origin_die
->tag
11264 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11265 && child_origin_die
->tag
== DW_TAG_subprogram
))
11266 complaint (&symfile_complaints
,
11267 _("Child DIE 0x%x and its abstract origin 0x%x have "
11268 "different tags"), child_die
->offset
.sect_off
,
11269 child_origin_die
->offset
.sect_off
);
11270 if (child_origin_die
->parent
!= origin_die
)
11271 complaint (&symfile_complaints
,
11272 _("Child DIE 0x%x and its abstract origin 0x%x have "
11273 "different parents"), child_die
->offset
.sect_off
,
11274 child_origin_die
->offset
.sect_off
);
11276 *offsets_end
++ = child_origin_die
->offset
;
11279 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11280 unsigned_int_compar
);
11281 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11282 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11283 complaint (&symfile_complaints
,
11284 _("Multiple children of DIE 0x%x refer "
11285 "to DIE 0x%x as their abstract origin"),
11286 die
->offset
.sect_off
, offsetp
->sect_off
);
11289 origin_child_die
= origin_die
->child
;
11290 while (origin_child_die
&& origin_child_die
->tag
)
11292 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11293 while (offsetp
< offsets_end
11294 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11296 if (offsetp
>= offsets_end
11297 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11299 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11300 Check whether we're already processing ORIGIN_CHILD_DIE.
11301 This can happen with mutually referenced abstract_origins.
11303 if (!origin_child_die
->in_process
)
11304 process_die (origin_child_die
, origin_cu
);
11306 origin_child_die
= sibling_die (origin_child_die
);
11308 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11310 do_cleanups (cleanups
);
11314 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11316 struct objfile
*objfile
= cu
->objfile
;
11317 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11318 struct context_stack
*newobj
;
11321 struct die_info
*child_die
;
11322 struct attribute
*attr
, *call_line
, *call_file
;
11324 CORE_ADDR baseaddr
;
11325 struct block
*block
;
11326 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11327 VEC (symbolp
) *template_args
= NULL
;
11328 struct template_symbol
*templ_func
= NULL
;
11332 /* If we do not have call site information, we can't show the
11333 caller of this inlined function. That's too confusing, so
11334 only use the scope for local variables. */
11335 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11336 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11337 if (call_line
== NULL
|| call_file
== NULL
)
11339 read_lexical_block_scope (die
, cu
);
11344 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11346 name
= dwarf2_name (die
, cu
);
11348 /* Ignore functions with missing or empty names. These are actually
11349 illegal according to the DWARF standard. */
11352 complaint (&symfile_complaints
,
11353 _("missing name for subprogram DIE at %d"),
11354 die
->offset
.sect_off
);
11358 /* Ignore functions with missing or invalid low and high pc attributes. */
11359 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11361 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11362 if (!attr
|| !DW_UNSND (attr
))
11363 complaint (&symfile_complaints
,
11364 _("cannot get low and high bounds "
11365 "for subprogram DIE at %d"),
11366 die
->offset
.sect_off
);
11370 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11371 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11373 /* If we have any template arguments, then we must allocate a
11374 different sort of symbol. */
11375 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11377 if (child_die
->tag
== DW_TAG_template_type_param
11378 || child_die
->tag
== DW_TAG_template_value_param
)
11380 templ_func
= allocate_template_symbol (objfile
);
11381 templ_func
->base
.is_cplus_template_function
= 1;
11386 newobj
= push_context (0, lowpc
);
11387 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11388 (struct symbol
*) templ_func
);
11390 /* If there is a location expression for DW_AT_frame_base, record
11392 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11394 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11396 cu
->list_in_scope
= &local_symbols
;
11398 if (die
->child
!= NULL
)
11400 child_die
= die
->child
;
11401 while (child_die
&& child_die
->tag
)
11403 if (child_die
->tag
== DW_TAG_template_type_param
11404 || child_die
->tag
== DW_TAG_template_value_param
)
11406 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11409 VEC_safe_push (symbolp
, template_args
, arg
);
11412 process_die (child_die
, cu
);
11413 child_die
= sibling_die (child_die
);
11417 inherit_abstract_dies (die
, cu
);
11419 /* If we have a DW_AT_specification, we might need to import using
11420 directives from the context of the specification DIE. See the
11421 comment in determine_prefix. */
11422 if (cu
->language
== language_cplus
11423 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11425 struct dwarf2_cu
*spec_cu
= cu
;
11426 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11430 child_die
= spec_die
->child
;
11431 while (child_die
&& child_die
->tag
)
11433 if (child_die
->tag
== DW_TAG_imported_module
)
11434 process_die (child_die
, spec_cu
);
11435 child_die
= sibling_die (child_die
);
11438 /* In some cases, GCC generates specification DIEs that
11439 themselves contain DW_AT_specification attributes. */
11440 spec_die
= die_specification (spec_die
, &spec_cu
);
11444 newobj
= pop_context ();
11445 /* Make a block for the local symbols within. */
11446 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11449 /* For C++, set the block's scope. */
11450 if ((cu
->language
== language_cplus
11451 || cu
->language
== language_fortran
11452 || cu
->language
== language_d
)
11453 && cu
->processing_has_namespace_info
)
11454 block_set_scope (block
, determine_prefix (die
, cu
),
11455 &objfile
->objfile_obstack
);
11457 /* If we have address ranges, record them. */
11458 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11460 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11462 /* Attach template arguments to function. */
11463 if (! VEC_empty (symbolp
, template_args
))
11465 gdb_assert (templ_func
!= NULL
);
11467 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11468 templ_func
->template_arguments
11469 = obstack_alloc (&objfile
->objfile_obstack
,
11470 (templ_func
->n_template_arguments
11471 * sizeof (struct symbol
*)));
11472 memcpy (templ_func
->template_arguments
,
11473 VEC_address (symbolp
, template_args
),
11474 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11475 VEC_free (symbolp
, template_args
);
11478 /* In C++, we can have functions nested inside functions (e.g., when
11479 a function declares a class that has methods). This means that
11480 when we finish processing a function scope, we may need to go
11481 back to building a containing block's symbol lists. */
11482 local_symbols
= newobj
->locals
;
11483 using_directives
= newobj
->using_directives
;
11485 /* If we've finished processing a top-level function, subsequent
11486 symbols go in the file symbol list. */
11487 if (outermost_context_p ())
11488 cu
->list_in_scope
= &file_symbols
;
11491 /* Process all the DIES contained within a lexical block scope. Start
11492 a new scope, process the dies, and then close the scope. */
11495 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11497 struct objfile
*objfile
= cu
->objfile
;
11498 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11499 struct context_stack
*newobj
;
11500 CORE_ADDR lowpc
, highpc
;
11501 struct die_info
*child_die
;
11502 CORE_ADDR baseaddr
;
11504 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11506 /* Ignore blocks with missing or invalid low and high pc attributes. */
11507 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11508 as multiple lexical blocks? Handling children in a sane way would
11509 be nasty. Might be easier to properly extend generic blocks to
11510 describe ranges. */
11511 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11513 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11514 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11516 push_context (0, lowpc
);
11517 if (die
->child
!= NULL
)
11519 child_die
= die
->child
;
11520 while (child_die
&& child_die
->tag
)
11522 process_die (child_die
, cu
);
11523 child_die
= sibling_die (child_die
);
11526 inherit_abstract_dies (die
, cu
);
11527 newobj
= pop_context ();
11529 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11531 struct block
*block
11532 = finish_block (0, &local_symbols
, newobj
->old_blocks
,
11533 newobj
->start_addr
, highpc
);
11535 /* Note that recording ranges after traversing children, as we
11536 do here, means that recording a parent's ranges entails
11537 walking across all its children's ranges as they appear in
11538 the address map, which is quadratic behavior.
11540 It would be nicer to record the parent's ranges before
11541 traversing its children, simply overriding whatever you find
11542 there. But since we don't even decide whether to create a
11543 block until after we've traversed its children, that's hard
11545 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11547 local_symbols
= newobj
->locals
;
11548 using_directives
= newobj
->using_directives
;
11551 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11554 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11556 struct objfile
*objfile
= cu
->objfile
;
11557 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11558 CORE_ADDR pc
, baseaddr
;
11559 struct attribute
*attr
;
11560 struct call_site
*call_site
, call_site_local
;
11563 struct die_info
*child_die
;
11565 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11567 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11570 complaint (&symfile_complaints
,
11571 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11572 "DIE 0x%x [in module %s]"),
11573 die
->offset
.sect_off
, objfile_name (objfile
));
11576 pc
= attr_value_as_address (attr
) + baseaddr
;
11577 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11579 if (cu
->call_site_htab
== NULL
)
11580 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11581 NULL
, &objfile
->objfile_obstack
,
11582 hashtab_obstack_allocate
, NULL
);
11583 call_site_local
.pc
= pc
;
11584 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11587 complaint (&symfile_complaints
,
11588 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11589 "DIE 0x%x [in module %s]"),
11590 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11591 objfile_name (objfile
));
11595 /* Count parameters at the caller. */
11598 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11599 child_die
= sibling_die (child_die
))
11601 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11603 complaint (&symfile_complaints
,
11604 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11605 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11606 child_die
->tag
, child_die
->offset
.sect_off
,
11607 objfile_name (objfile
));
11614 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11615 (sizeof (*call_site
)
11616 + (sizeof (*call_site
->parameter
)
11617 * (nparams
- 1))));
11619 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11620 call_site
->pc
= pc
;
11622 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11624 struct die_info
*func_die
;
11626 /* Skip also over DW_TAG_inlined_subroutine. */
11627 for (func_die
= die
->parent
;
11628 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11629 && func_die
->tag
!= DW_TAG_subroutine_type
;
11630 func_die
= func_die
->parent
);
11632 /* DW_AT_GNU_all_call_sites is a superset
11633 of DW_AT_GNU_all_tail_call_sites. */
11635 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11636 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11638 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11639 not complete. But keep CALL_SITE for look ups via call_site_htab,
11640 both the initial caller containing the real return address PC and
11641 the final callee containing the current PC of a chain of tail
11642 calls do not need to have the tail call list complete. But any
11643 function candidate for a virtual tail call frame searched via
11644 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11645 determined unambiguously. */
11649 struct type
*func_type
= NULL
;
11652 func_type
= get_die_type (func_die
, cu
);
11653 if (func_type
!= NULL
)
11655 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11657 /* Enlist this call site to the function. */
11658 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11659 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11662 complaint (&symfile_complaints
,
11663 _("Cannot find function owning DW_TAG_GNU_call_site "
11664 "DIE 0x%x [in module %s]"),
11665 die
->offset
.sect_off
, objfile_name (objfile
));
11669 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11671 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11672 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11673 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11674 /* Keep NULL DWARF_BLOCK. */;
11675 else if (attr_form_is_block (attr
))
11677 struct dwarf2_locexpr_baton
*dlbaton
;
11679 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11680 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11681 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11682 dlbaton
->per_cu
= cu
->per_cu
;
11684 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11686 else if (attr_form_is_ref (attr
))
11688 struct dwarf2_cu
*target_cu
= cu
;
11689 struct die_info
*target_die
;
11691 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11692 gdb_assert (target_cu
->objfile
== objfile
);
11693 if (die_is_declaration (target_die
, target_cu
))
11695 const char *target_physname
= NULL
;
11696 struct attribute
*target_attr
;
11698 /* Prefer the mangled name; otherwise compute the demangled one. */
11699 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11700 if (target_attr
== NULL
)
11701 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11703 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11704 target_physname
= DW_STRING (target_attr
);
11706 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11707 if (target_physname
== NULL
)
11708 complaint (&symfile_complaints
,
11709 _("DW_AT_GNU_call_site_target target DIE has invalid "
11710 "physname, for referencing DIE 0x%x [in module %s]"),
11711 die
->offset
.sect_off
, objfile_name (objfile
));
11713 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11719 /* DW_AT_entry_pc should be preferred. */
11720 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11721 complaint (&symfile_complaints
,
11722 _("DW_AT_GNU_call_site_target target DIE has invalid "
11723 "low pc, for referencing DIE 0x%x [in module %s]"),
11724 die
->offset
.sect_off
, objfile_name (objfile
));
11727 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11728 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11733 complaint (&symfile_complaints
,
11734 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11735 "block nor reference, for DIE 0x%x [in module %s]"),
11736 die
->offset
.sect_off
, objfile_name (objfile
));
11738 call_site
->per_cu
= cu
->per_cu
;
11740 for (child_die
= die
->child
;
11741 child_die
&& child_die
->tag
;
11742 child_die
= sibling_die (child_die
))
11744 struct call_site_parameter
*parameter
;
11745 struct attribute
*loc
, *origin
;
11747 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11749 /* Already printed the complaint above. */
11753 gdb_assert (call_site
->parameter_count
< nparams
);
11754 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11756 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11757 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11758 register is contained in DW_AT_GNU_call_site_value. */
11760 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11761 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11762 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11764 sect_offset offset
;
11766 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11767 offset
= dwarf2_get_ref_die_offset (origin
);
11768 if (!offset_in_cu_p (&cu
->header
, offset
))
11770 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11771 binding can be done only inside one CU. Such referenced DIE
11772 therefore cannot be even moved to DW_TAG_partial_unit. */
11773 complaint (&symfile_complaints
,
11774 _("DW_AT_abstract_origin offset is not in CU for "
11775 "DW_TAG_GNU_call_site child DIE 0x%x "
11777 child_die
->offset
.sect_off
, objfile_name (objfile
));
11780 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11781 - cu
->header
.offset
.sect_off
);
11783 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11785 complaint (&symfile_complaints
,
11786 _("No DW_FORM_block* DW_AT_location for "
11787 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11788 child_die
->offset
.sect_off
, objfile_name (objfile
));
11793 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11794 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11795 if (parameter
->u
.dwarf_reg
!= -1)
11796 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11797 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11798 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11799 ¶meter
->u
.fb_offset
))
11800 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11803 complaint (&symfile_complaints
,
11804 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11805 "for DW_FORM_block* DW_AT_location is supported for "
11806 "DW_TAG_GNU_call_site child DIE 0x%x "
11808 child_die
->offset
.sect_off
, objfile_name (objfile
));
11813 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11814 if (!attr_form_is_block (attr
))
11816 complaint (&symfile_complaints
,
11817 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11818 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11819 child_die
->offset
.sect_off
, objfile_name (objfile
));
11822 parameter
->value
= DW_BLOCK (attr
)->data
;
11823 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11825 /* Parameters are not pre-cleared by memset above. */
11826 parameter
->data_value
= NULL
;
11827 parameter
->data_value_size
= 0;
11828 call_site
->parameter_count
++;
11830 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11833 if (!attr_form_is_block (attr
))
11834 complaint (&symfile_complaints
,
11835 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11836 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11837 child_die
->offset
.sect_off
, objfile_name (objfile
));
11840 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11841 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11847 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11848 Return 1 if the attributes are present and valid, otherwise, return 0.
11849 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11852 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11853 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11854 struct partial_symtab
*ranges_pst
)
11856 struct objfile
*objfile
= cu
->objfile
;
11857 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11858 struct comp_unit_head
*cu_header
= &cu
->header
;
11859 bfd
*obfd
= objfile
->obfd
;
11860 unsigned int addr_size
= cu_header
->addr_size
;
11861 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11862 /* Base address selection entry. */
11865 unsigned int dummy
;
11866 const gdb_byte
*buffer
;
11870 CORE_ADDR high
= 0;
11871 CORE_ADDR baseaddr
;
11873 found_base
= cu
->base_known
;
11874 base
= cu
->base_address
;
11876 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11877 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11879 complaint (&symfile_complaints
,
11880 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11884 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11886 /* Read in the largest possible address. */
11887 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11888 if ((marker
& mask
) == mask
)
11890 /* If we found the largest possible address, then
11891 read the base address. */
11892 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11893 buffer
+= 2 * addr_size
;
11894 offset
+= 2 * addr_size
;
11900 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11904 CORE_ADDR range_beginning
, range_end
;
11906 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11907 buffer
+= addr_size
;
11908 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11909 buffer
+= addr_size
;
11910 offset
+= 2 * addr_size
;
11912 /* An end of list marker is a pair of zero addresses. */
11913 if (range_beginning
== 0 && range_end
== 0)
11914 /* Found the end of list entry. */
11917 /* Each base address selection entry is a pair of 2 values.
11918 The first is the largest possible address, the second is
11919 the base address. Check for a base address here. */
11920 if ((range_beginning
& mask
) == mask
)
11922 /* If we found the largest possible address, then
11923 read the base address. */
11924 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11931 /* We have no valid base address for the ranges
11933 complaint (&symfile_complaints
,
11934 _("Invalid .debug_ranges data (no base address)"));
11938 if (range_beginning
> range_end
)
11940 /* Inverted range entries are invalid. */
11941 complaint (&symfile_complaints
,
11942 _("Invalid .debug_ranges data (inverted range)"));
11946 /* Empty range entries have no effect. */
11947 if (range_beginning
== range_end
)
11950 range_beginning
+= base
;
11953 /* A not-uncommon case of bad debug info.
11954 Don't pollute the addrmap with bad data. */
11955 if (range_beginning
+ baseaddr
== 0
11956 && !dwarf2_per_objfile
->has_section_at_zero
)
11958 complaint (&symfile_complaints
,
11959 _(".debug_ranges entry has start address of zero"
11960 " [in module %s]"), objfile_name (objfile
));
11964 if (ranges_pst
!= NULL
)
11969 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11970 range_beginning
+ baseaddr
);
11971 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11972 range_end
+ baseaddr
);
11973 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11977 /* FIXME: This is recording everything as a low-high
11978 segment of consecutive addresses. We should have a
11979 data structure for discontiguous block ranges
11983 low
= range_beginning
;
11989 if (range_beginning
< low
)
11990 low
= range_beginning
;
11991 if (range_end
> high
)
11997 /* If the first entry is an end-of-list marker, the range
11998 describes an empty scope, i.e. no instructions. */
12004 *high_return
= high
;
12008 /* Get low and high pc attributes from a die. Return 1 if the attributes
12009 are present and valid, otherwise, return 0. Return -1 if the range is
12010 discontinuous, i.e. derived from DW_AT_ranges information. */
12013 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12014 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12015 struct partial_symtab
*pst
)
12017 struct attribute
*attr
;
12018 struct attribute
*attr_high
;
12020 CORE_ADDR high
= 0;
12023 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12026 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12029 low
= attr_value_as_address (attr
);
12030 high
= attr_value_as_address (attr_high
);
12031 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12035 /* Found high w/o low attribute. */
12038 /* Found consecutive range of addresses. */
12043 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12046 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12047 We take advantage of the fact that DW_AT_ranges does not appear
12048 in DW_TAG_compile_unit of DWO files. */
12049 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12050 unsigned int ranges_offset
= (DW_UNSND (attr
)
12051 + (need_ranges_base
12055 /* Value of the DW_AT_ranges attribute is the offset in the
12056 .debug_ranges section. */
12057 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12059 /* Found discontinuous range of addresses. */
12064 /* read_partial_die has also the strict LOW < HIGH requirement. */
12068 /* When using the GNU linker, .gnu.linkonce. sections are used to
12069 eliminate duplicate copies of functions and vtables and such.
12070 The linker will arbitrarily choose one and discard the others.
12071 The AT_*_pc values for such functions refer to local labels in
12072 these sections. If the section from that file was discarded, the
12073 labels are not in the output, so the relocs get a value of 0.
12074 If this is a discarded function, mark the pc bounds as invalid,
12075 so that GDB will ignore it. */
12076 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12085 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12086 its low and high PC addresses. Do nothing if these addresses could not
12087 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12088 and HIGHPC to the high address if greater than HIGHPC. */
12091 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12092 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12093 struct dwarf2_cu
*cu
)
12095 CORE_ADDR low
, high
;
12096 struct die_info
*child
= die
->child
;
12098 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12100 *lowpc
= min (*lowpc
, low
);
12101 *highpc
= max (*highpc
, high
);
12104 /* If the language does not allow nested subprograms (either inside
12105 subprograms or lexical blocks), we're done. */
12106 if (cu
->language
!= language_ada
)
12109 /* Check all the children of the given DIE. If it contains nested
12110 subprograms, then check their pc bounds. Likewise, we need to
12111 check lexical blocks as well, as they may also contain subprogram
12113 while (child
&& child
->tag
)
12115 if (child
->tag
== DW_TAG_subprogram
12116 || child
->tag
== DW_TAG_lexical_block
)
12117 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12118 child
= sibling_die (child
);
12122 /* Get the low and high pc's represented by the scope DIE, and store
12123 them in *LOWPC and *HIGHPC. If the correct values can't be
12124 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12127 get_scope_pc_bounds (struct die_info
*die
,
12128 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12129 struct dwarf2_cu
*cu
)
12131 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12132 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12133 CORE_ADDR current_low
, current_high
;
12135 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12137 best_low
= current_low
;
12138 best_high
= current_high
;
12142 struct die_info
*child
= die
->child
;
12144 while (child
&& child
->tag
)
12146 switch (child
->tag
) {
12147 case DW_TAG_subprogram
:
12148 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12150 case DW_TAG_namespace
:
12151 case DW_TAG_module
:
12152 /* FIXME: carlton/2004-01-16: Should we do this for
12153 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12154 that current GCC's always emit the DIEs corresponding
12155 to definitions of methods of classes as children of a
12156 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12157 the DIEs giving the declarations, which could be
12158 anywhere). But I don't see any reason why the
12159 standards says that they have to be there. */
12160 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12162 if (current_low
!= ((CORE_ADDR
) -1))
12164 best_low
= min (best_low
, current_low
);
12165 best_high
= max (best_high
, current_high
);
12173 child
= sibling_die (child
);
12178 *highpc
= best_high
;
12181 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12185 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12186 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12188 struct objfile
*objfile
= cu
->objfile
;
12189 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12190 struct attribute
*attr
;
12191 struct attribute
*attr_high
;
12193 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12196 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12199 CORE_ADDR low
= attr_value_as_address (attr
);
12200 CORE_ADDR high
= attr_value_as_address (attr_high
);
12202 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12205 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12206 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12207 record_block_range (block
, low
, high
- 1);
12211 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12214 bfd
*obfd
= objfile
->obfd
;
12215 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12216 We take advantage of the fact that DW_AT_ranges does not appear
12217 in DW_TAG_compile_unit of DWO files. */
12218 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12220 /* The value of the DW_AT_ranges attribute is the offset of the
12221 address range list in the .debug_ranges section. */
12222 unsigned long offset
= (DW_UNSND (attr
)
12223 + (need_ranges_base
? cu
->ranges_base
: 0));
12224 const gdb_byte
*buffer
;
12226 /* For some target architectures, but not others, the
12227 read_address function sign-extends the addresses it returns.
12228 To recognize base address selection entries, we need a
12230 unsigned int addr_size
= cu
->header
.addr_size
;
12231 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12233 /* The base address, to which the next pair is relative. Note
12234 that this 'base' is a DWARF concept: most entries in a range
12235 list are relative, to reduce the number of relocs against the
12236 debugging information. This is separate from this function's
12237 'baseaddr' argument, which GDB uses to relocate debugging
12238 information from a shared library based on the address at
12239 which the library was loaded. */
12240 CORE_ADDR base
= cu
->base_address
;
12241 int base_known
= cu
->base_known
;
12243 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12244 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12246 complaint (&symfile_complaints
,
12247 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12251 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12255 unsigned int bytes_read
;
12256 CORE_ADDR start
, end
;
12258 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12259 buffer
+= bytes_read
;
12260 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12261 buffer
+= bytes_read
;
12263 /* Did we find the end of the range list? */
12264 if (start
== 0 && end
== 0)
12267 /* Did we find a base address selection entry? */
12268 else if ((start
& base_select_mask
) == base_select_mask
)
12274 /* We found an ordinary address range. */
12279 complaint (&symfile_complaints
,
12280 _("Invalid .debug_ranges data "
12281 "(no base address)"));
12287 /* Inverted range entries are invalid. */
12288 complaint (&symfile_complaints
,
12289 _("Invalid .debug_ranges data "
12290 "(inverted range)"));
12294 /* Empty range entries have no effect. */
12298 start
+= base
+ baseaddr
;
12299 end
+= base
+ baseaddr
;
12301 /* A not-uncommon case of bad debug info.
12302 Don't pollute the addrmap with bad data. */
12303 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12305 complaint (&symfile_complaints
,
12306 _(".debug_ranges entry has start address of zero"
12307 " [in module %s]"), objfile_name (objfile
));
12311 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12312 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12313 record_block_range (block
, start
, end
- 1);
12319 /* Check whether the producer field indicates either of GCC < 4.6, or the
12320 Intel C/C++ compiler, and cache the result in CU. */
12323 check_producer (struct dwarf2_cu
*cu
)
12328 if (cu
->producer
== NULL
)
12330 /* For unknown compilers expect their behavior is DWARF version
12333 GCC started to support .debug_types sections by -gdwarf-4 since
12334 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12335 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12336 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12337 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12339 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12341 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12342 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12344 else if (startswith (cu
->producer
, "Intel(R) C"))
12345 cu
->producer_is_icc
= 1;
12348 /* For other non-GCC compilers, expect their behavior is DWARF version
12352 cu
->checked_producer
= 1;
12355 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12356 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12357 during 4.6.0 experimental. */
12360 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12362 if (!cu
->checked_producer
)
12363 check_producer (cu
);
12365 return cu
->producer_is_gxx_lt_4_6
;
12368 /* Return the default accessibility type if it is not overriden by
12369 DW_AT_accessibility. */
12371 static enum dwarf_access_attribute
12372 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12374 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12376 /* The default DWARF 2 accessibility for members is public, the default
12377 accessibility for inheritance is private. */
12379 if (die
->tag
!= DW_TAG_inheritance
)
12380 return DW_ACCESS_public
;
12382 return DW_ACCESS_private
;
12386 /* DWARF 3+ defines the default accessibility a different way. The same
12387 rules apply now for DW_TAG_inheritance as for the members and it only
12388 depends on the container kind. */
12390 if (die
->parent
->tag
== DW_TAG_class_type
)
12391 return DW_ACCESS_private
;
12393 return DW_ACCESS_public
;
12397 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12398 offset. If the attribute was not found return 0, otherwise return
12399 1. If it was found but could not properly be handled, set *OFFSET
12403 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12406 struct attribute
*attr
;
12408 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12413 /* Note that we do not check for a section offset first here.
12414 This is because DW_AT_data_member_location is new in DWARF 4,
12415 so if we see it, we can assume that a constant form is really
12416 a constant and not a section offset. */
12417 if (attr_form_is_constant (attr
))
12418 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12419 else if (attr_form_is_section_offset (attr
))
12420 dwarf2_complex_location_expr_complaint ();
12421 else if (attr_form_is_block (attr
))
12422 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12424 dwarf2_complex_location_expr_complaint ();
12432 /* Add an aggregate field to the field list. */
12435 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12436 struct dwarf2_cu
*cu
)
12438 struct objfile
*objfile
= cu
->objfile
;
12439 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12440 struct nextfield
*new_field
;
12441 struct attribute
*attr
;
12443 const char *fieldname
= "";
12445 /* Allocate a new field list entry and link it in. */
12446 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12447 make_cleanup (xfree
, new_field
);
12448 memset (new_field
, 0, sizeof (struct nextfield
));
12450 if (die
->tag
== DW_TAG_inheritance
)
12452 new_field
->next
= fip
->baseclasses
;
12453 fip
->baseclasses
= new_field
;
12457 new_field
->next
= fip
->fields
;
12458 fip
->fields
= new_field
;
12462 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12464 new_field
->accessibility
= DW_UNSND (attr
);
12466 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12467 if (new_field
->accessibility
!= DW_ACCESS_public
)
12468 fip
->non_public_fields
= 1;
12470 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12472 new_field
->virtuality
= DW_UNSND (attr
);
12474 new_field
->virtuality
= DW_VIRTUALITY_none
;
12476 fp
= &new_field
->field
;
12478 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12482 /* Data member other than a C++ static data member. */
12484 /* Get type of field. */
12485 fp
->type
= die_type (die
, cu
);
12487 SET_FIELD_BITPOS (*fp
, 0);
12489 /* Get bit size of field (zero if none). */
12490 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12493 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12497 FIELD_BITSIZE (*fp
) = 0;
12500 /* Get bit offset of field. */
12501 if (handle_data_member_location (die
, cu
, &offset
))
12502 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12503 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12506 if (gdbarch_bits_big_endian (gdbarch
))
12508 /* For big endian bits, the DW_AT_bit_offset gives the
12509 additional bit offset from the MSB of the containing
12510 anonymous object to the MSB of the field. We don't
12511 have to do anything special since we don't need to
12512 know the size of the anonymous object. */
12513 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12517 /* For little endian bits, compute the bit offset to the
12518 MSB of the anonymous object, subtract off the number of
12519 bits from the MSB of the field to the MSB of the
12520 object, and then subtract off the number of bits of
12521 the field itself. The result is the bit offset of
12522 the LSB of the field. */
12523 int anonymous_size
;
12524 int bit_offset
= DW_UNSND (attr
);
12526 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12529 /* The size of the anonymous object containing
12530 the bit field is explicit, so use the
12531 indicated size (in bytes). */
12532 anonymous_size
= DW_UNSND (attr
);
12536 /* The size of the anonymous object containing
12537 the bit field must be inferred from the type
12538 attribute of the data member containing the
12540 anonymous_size
= TYPE_LENGTH (fp
->type
);
12542 SET_FIELD_BITPOS (*fp
,
12543 (FIELD_BITPOS (*fp
)
12544 + anonymous_size
* bits_per_byte
12545 - bit_offset
- FIELD_BITSIZE (*fp
)));
12549 /* Get name of field. */
12550 fieldname
= dwarf2_name (die
, cu
);
12551 if (fieldname
== NULL
)
12554 /* The name is already allocated along with this objfile, so we don't
12555 need to duplicate it for the type. */
12556 fp
->name
= fieldname
;
12558 /* Change accessibility for artificial fields (e.g. virtual table
12559 pointer or virtual base class pointer) to private. */
12560 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12562 FIELD_ARTIFICIAL (*fp
) = 1;
12563 new_field
->accessibility
= DW_ACCESS_private
;
12564 fip
->non_public_fields
= 1;
12567 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12569 /* C++ static member. */
12571 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12572 is a declaration, but all versions of G++ as of this writing
12573 (so through at least 3.2.1) incorrectly generate
12574 DW_TAG_variable tags. */
12576 const char *physname
;
12578 /* Get name of field. */
12579 fieldname
= dwarf2_name (die
, cu
);
12580 if (fieldname
== NULL
)
12583 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12585 /* Only create a symbol if this is an external value.
12586 new_symbol checks this and puts the value in the global symbol
12587 table, which we want. If it is not external, new_symbol
12588 will try to put the value in cu->list_in_scope which is wrong. */
12589 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12591 /* A static const member, not much different than an enum as far as
12592 we're concerned, except that we can support more types. */
12593 new_symbol (die
, NULL
, cu
);
12596 /* Get physical name. */
12597 physname
= dwarf2_physname (fieldname
, die
, cu
);
12599 /* The name is already allocated along with this objfile, so we don't
12600 need to duplicate it for the type. */
12601 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12602 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12603 FIELD_NAME (*fp
) = fieldname
;
12605 else if (die
->tag
== DW_TAG_inheritance
)
12609 /* C++ base class field. */
12610 if (handle_data_member_location (die
, cu
, &offset
))
12611 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12612 FIELD_BITSIZE (*fp
) = 0;
12613 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12614 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12615 fip
->nbaseclasses
++;
12619 /* Add a typedef defined in the scope of the FIP's class. */
12622 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12623 struct dwarf2_cu
*cu
)
12625 struct objfile
*objfile
= cu
->objfile
;
12626 struct typedef_field_list
*new_field
;
12627 struct attribute
*attr
;
12628 struct typedef_field
*fp
;
12629 char *fieldname
= "";
12631 /* Allocate a new field list entry and link it in. */
12632 new_field
= xzalloc (sizeof (*new_field
));
12633 make_cleanup (xfree
, new_field
);
12635 gdb_assert (die
->tag
== DW_TAG_typedef
);
12637 fp
= &new_field
->field
;
12639 /* Get name of field. */
12640 fp
->name
= dwarf2_name (die
, cu
);
12641 if (fp
->name
== NULL
)
12644 fp
->type
= read_type_die (die
, cu
);
12646 new_field
->next
= fip
->typedef_field_list
;
12647 fip
->typedef_field_list
= new_field
;
12648 fip
->typedef_field_list_count
++;
12651 /* Create the vector of fields, and attach it to the type. */
12654 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12655 struct dwarf2_cu
*cu
)
12657 int nfields
= fip
->nfields
;
12659 /* Record the field count, allocate space for the array of fields,
12660 and create blank accessibility bitfields if necessary. */
12661 TYPE_NFIELDS (type
) = nfields
;
12662 TYPE_FIELDS (type
) = (struct field
*)
12663 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12664 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12666 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12668 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12670 TYPE_FIELD_PRIVATE_BITS (type
) =
12671 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12672 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12674 TYPE_FIELD_PROTECTED_BITS (type
) =
12675 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12676 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12678 TYPE_FIELD_IGNORE_BITS (type
) =
12679 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12680 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12683 /* If the type has baseclasses, allocate and clear a bit vector for
12684 TYPE_FIELD_VIRTUAL_BITS. */
12685 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12687 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12688 unsigned char *pointer
;
12690 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12691 pointer
= TYPE_ALLOC (type
, num_bytes
);
12692 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12693 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12694 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12697 /* Copy the saved-up fields into the field vector. Start from the head of
12698 the list, adding to the tail of the field array, so that they end up in
12699 the same order in the array in which they were added to the list. */
12700 while (nfields
-- > 0)
12702 struct nextfield
*fieldp
;
12706 fieldp
= fip
->fields
;
12707 fip
->fields
= fieldp
->next
;
12711 fieldp
= fip
->baseclasses
;
12712 fip
->baseclasses
= fieldp
->next
;
12715 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12716 switch (fieldp
->accessibility
)
12718 case DW_ACCESS_private
:
12719 if (cu
->language
!= language_ada
)
12720 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12723 case DW_ACCESS_protected
:
12724 if (cu
->language
!= language_ada
)
12725 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12728 case DW_ACCESS_public
:
12732 /* Unknown accessibility. Complain and treat it as public. */
12734 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12735 fieldp
->accessibility
);
12739 if (nfields
< fip
->nbaseclasses
)
12741 switch (fieldp
->virtuality
)
12743 case DW_VIRTUALITY_virtual
:
12744 case DW_VIRTUALITY_pure_virtual
:
12745 if (cu
->language
== language_ada
)
12746 error (_("unexpected virtuality in component of Ada type"));
12747 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12754 /* Return true if this member function is a constructor, false
12758 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12760 const char *fieldname
;
12761 const char *type_name
;
12764 if (die
->parent
== NULL
)
12767 if (die
->parent
->tag
!= DW_TAG_structure_type
12768 && die
->parent
->tag
!= DW_TAG_union_type
12769 && die
->parent
->tag
!= DW_TAG_class_type
)
12772 fieldname
= dwarf2_name (die
, cu
);
12773 type_name
= dwarf2_name (die
->parent
, cu
);
12774 if (fieldname
== NULL
|| type_name
== NULL
)
12777 len
= strlen (fieldname
);
12778 return (strncmp (fieldname
, type_name
, len
) == 0
12779 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12782 /* Add a member function to the proper fieldlist. */
12785 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12786 struct type
*type
, struct dwarf2_cu
*cu
)
12788 struct objfile
*objfile
= cu
->objfile
;
12789 struct attribute
*attr
;
12790 struct fnfieldlist
*flp
;
12792 struct fn_field
*fnp
;
12793 const char *fieldname
;
12794 struct nextfnfield
*new_fnfield
;
12795 struct type
*this_type
;
12796 enum dwarf_access_attribute accessibility
;
12798 if (cu
->language
== language_ada
)
12799 error (_("unexpected member function in Ada type"));
12801 /* Get name of member function. */
12802 fieldname
= dwarf2_name (die
, cu
);
12803 if (fieldname
== NULL
)
12806 /* Look up member function name in fieldlist. */
12807 for (i
= 0; i
< fip
->nfnfields
; i
++)
12809 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12813 /* Create new list element if necessary. */
12814 if (i
< fip
->nfnfields
)
12815 flp
= &fip
->fnfieldlists
[i
];
12818 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12820 fip
->fnfieldlists
= (struct fnfieldlist
*)
12821 xrealloc (fip
->fnfieldlists
,
12822 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12823 * sizeof (struct fnfieldlist
));
12824 if (fip
->nfnfields
== 0)
12825 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12827 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12828 flp
->name
= fieldname
;
12831 i
= fip
->nfnfields
++;
12834 /* Create a new member function field and chain it to the field list
12836 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12837 make_cleanup (xfree
, new_fnfield
);
12838 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12839 new_fnfield
->next
= flp
->head
;
12840 flp
->head
= new_fnfield
;
12843 /* Fill in the member function field info. */
12844 fnp
= &new_fnfield
->fnfield
;
12846 /* Delay processing of the physname until later. */
12847 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12849 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12854 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12855 fnp
->physname
= physname
? physname
: "";
12858 fnp
->type
= alloc_type (objfile
);
12859 this_type
= read_type_die (die
, cu
);
12860 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12862 int nparams
= TYPE_NFIELDS (this_type
);
12864 /* TYPE is the domain of this method, and THIS_TYPE is the type
12865 of the method itself (TYPE_CODE_METHOD). */
12866 smash_to_method_type (fnp
->type
, type
,
12867 TYPE_TARGET_TYPE (this_type
),
12868 TYPE_FIELDS (this_type
),
12869 TYPE_NFIELDS (this_type
),
12870 TYPE_VARARGS (this_type
));
12872 /* Handle static member functions.
12873 Dwarf2 has no clean way to discern C++ static and non-static
12874 member functions. G++ helps GDB by marking the first
12875 parameter for non-static member functions (which is the this
12876 pointer) as artificial. We obtain this information from
12877 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12878 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12879 fnp
->voffset
= VOFFSET_STATIC
;
12882 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12883 dwarf2_full_name (fieldname
, die
, cu
));
12885 /* Get fcontext from DW_AT_containing_type if present. */
12886 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12887 fnp
->fcontext
= die_containing_type (die
, cu
);
12889 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12890 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12892 /* Get accessibility. */
12893 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12895 accessibility
= DW_UNSND (attr
);
12897 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12898 switch (accessibility
)
12900 case DW_ACCESS_private
:
12901 fnp
->is_private
= 1;
12903 case DW_ACCESS_protected
:
12904 fnp
->is_protected
= 1;
12908 /* Check for artificial methods. */
12909 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12910 if (attr
&& DW_UNSND (attr
) != 0)
12911 fnp
->is_artificial
= 1;
12913 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12915 /* Get index in virtual function table if it is a virtual member
12916 function. For older versions of GCC, this is an offset in the
12917 appropriate virtual table, as specified by DW_AT_containing_type.
12918 For everyone else, it is an expression to be evaluated relative
12919 to the object address. */
12921 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12924 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12926 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12928 /* Old-style GCC. */
12929 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12931 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12932 || (DW_BLOCK (attr
)->size
> 1
12933 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12934 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12936 struct dwarf_block blk
;
12939 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12941 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12942 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12943 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12944 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12945 dwarf2_complex_location_expr_complaint ();
12947 fnp
->voffset
/= cu
->header
.addr_size
;
12951 dwarf2_complex_location_expr_complaint ();
12953 if (!fnp
->fcontext
)
12955 /* If there is no `this' field and no DW_AT_containing_type,
12956 we cannot actually find a base class context for the
12958 if (TYPE_NFIELDS (this_type
) == 0
12959 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12961 complaint (&symfile_complaints
,
12962 _("cannot determine context for virtual member "
12963 "function \"%s\" (offset %d)"),
12964 fieldname
, die
->offset
.sect_off
);
12969 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12973 else if (attr_form_is_section_offset (attr
))
12975 dwarf2_complex_location_expr_complaint ();
12979 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12985 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12986 if (attr
&& DW_UNSND (attr
))
12988 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12989 complaint (&symfile_complaints
,
12990 _("Member function \"%s\" (offset %d) is virtual "
12991 "but the vtable offset is not specified"),
12992 fieldname
, die
->offset
.sect_off
);
12993 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12994 TYPE_CPLUS_DYNAMIC (type
) = 1;
12999 /* Create the vector of member function fields, and attach it to the type. */
13002 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13003 struct dwarf2_cu
*cu
)
13005 struct fnfieldlist
*flp
;
13008 if (cu
->language
== language_ada
)
13009 error (_("unexpected member functions in Ada type"));
13011 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13012 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13013 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13015 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13017 struct nextfnfield
*nfp
= flp
->head
;
13018 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13021 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13022 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13023 fn_flp
->fn_fields
= (struct fn_field
*)
13024 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13025 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13026 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13029 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13032 /* Returns non-zero if NAME is the name of a vtable member in CU's
13033 language, zero otherwise. */
13035 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13037 static const char vptr
[] = "_vptr";
13038 static const char vtable
[] = "vtable";
13040 /* Look for the C++ and Java forms of the vtable. */
13041 if ((cu
->language
== language_java
13042 && startswith (name
, vtable
))
13043 || (startswith (name
, vptr
)
13044 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13050 /* GCC outputs unnamed structures that are really pointers to member
13051 functions, with the ABI-specified layout. If TYPE describes
13052 such a structure, smash it into a member function type.
13054 GCC shouldn't do this; it should just output pointer to member DIEs.
13055 This is GCC PR debug/28767. */
13058 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13060 struct type
*pfn_type
, *self_type
, *new_type
;
13062 /* Check for a structure with no name and two children. */
13063 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13066 /* Check for __pfn and __delta members. */
13067 if (TYPE_FIELD_NAME (type
, 0) == NULL
13068 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13069 || TYPE_FIELD_NAME (type
, 1) == NULL
13070 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13073 /* Find the type of the method. */
13074 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13075 if (pfn_type
== NULL
13076 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13077 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13080 /* Look for the "this" argument. */
13081 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13082 if (TYPE_NFIELDS (pfn_type
) == 0
13083 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13084 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13087 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13088 new_type
= alloc_type (objfile
);
13089 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13090 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13091 TYPE_VARARGS (pfn_type
));
13092 smash_to_methodptr_type (type
, new_type
);
13095 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13099 producer_is_icc (struct dwarf2_cu
*cu
)
13101 if (!cu
->checked_producer
)
13102 check_producer (cu
);
13104 return cu
->producer_is_icc
;
13107 /* Called when we find the DIE that starts a structure or union scope
13108 (definition) to create a type for the structure or union. Fill in
13109 the type's name and general properties; the members will not be
13110 processed until process_structure_scope. A symbol table entry for
13111 the type will also not be done until process_structure_scope (assuming
13112 the type has a name).
13114 NOTE: we need to call these functions regardless of whether or not the
13115 DIE has a DW_AT_name attribute, since it might be an anonymous
13116 structure or union. This gets the type entered into our set of
13117 user defined types. */
13119 static struct type
*
13120 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13122 struct objfile
*objfile
= cu
->objfile
;
13124 struct attribute
*attr
;
13127 /* If the definition of this type lives in .debug_types, read that type.
13128 Don't follow DW_AT_specification though, that will take us back up
13129 the chain and we want to go down. */
13130 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13133 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13135 /* The type's CU may not be the same as CU.
13136 Ensure TYPE is recorded with CU in die_type_hash. */
13137 return set_die_type (die
, type
, cu
);
13140 type
= alloc_type (objfile
);
13141 INIT_CPLUS_SPECIFIC (type
);
13143 name
= dwarf2_name (die
, cu
);
13146 if (cu
->language
== language_cplus
13147 || cu
->language
== language_java
13148 || cu
->language
== language_d
)
13150 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13152 /* dwarf2_full_name might have already finished building the DIE's
13153 type. If so, there is no need to continue. */
13154 if (get_die_type (die
, cu
) != NULL
)
13155 return get_die_type (die
, cu
);
13157 TYPE_TAG_NAME (type
) = full_name
;
13158 if (die
->tag
== DW_TAG_structure_type
13159 || die
->tag
== DW_TAG_class_type
)
13160 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13164 /* The name is already allocated along with this objfile, so
13165 we don't need to duplicate it for the type. */
13166 TYPE_TAG_NAME (type
) = name
;
13167 if (die
->tag
== DW_TAG_class_type
)
13168 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13172 if (die
->tag
== DW_TAG_structure_type
)
13174 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13176 else if (die
->tag
== DW_TAG_union_type
)
13178 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13182 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13185 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13186 TYPE_DECLARED_CLASS (type
) = 1;
13188 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13191 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13195 TYPE_LENGTH (type
) = 0;
13198 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13200 /* ICC does not output the required DW_AT_declaration
13201 on incomplete types, but gives them a size of zero. */
13202 TYPE_STUB (type
) = 1;
13205 TYPE_STUB_SUPPORTED (type
) = 1;
13207 if (die_is_declaration (die
, cu
))
13208 TYPE_STUB (type
) = 1;
13209 else if (attr
== NULL
&& die
->child
== NULL
13210 && producer_is_realview (cu
->producer
))
13211 /* RealView does not output the required DW_AT_declaration
13212 on incomplete types. */
13213 TYPE_STUB (type
) = 1;
13215 /* We need to add the type field to the die immediately so we don't
13216 infinitely recurse when dealing with pointers to the structure
13217 type within the structure itself. */
13218 set_die_type (die
, type
, cu
);
13220 /* set_die_type should be already done. */
13221 set_descriptive_type (type
, die
, cu
);
13226 /* Finish creating a structure or union type, including filling in
13227 its members and creating a symbol for it. */
13230 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13232 struct objfile
*objfile
= cu
->objfile
;
13233 struct die_info
*child_die
;
13236 type
= get_die_type (die
, cu
);
13238 type
= read_structure_type (die
, cu
);
13240 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13242 struct field_info fi
;
13243 VEC (symbolp
) *template_args
= NULL
;
13244 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13246 memset (&fi
, 0, sizeof (struct field_info
));
13248 child_die
= die
->child
;
13250 while (child_die
&& child_die
->tag
)
13252 if (child_die
->tag
== DW_TAG_member
13253 || child_die
->tag
== DW_TAG_variable
)
13255 /* NOTE: carlton/2002-11-05: A C++ static data member
13256 should be a DW_TAG_member that is a declaration, but
13257 all versions of G++ as of this writing (so through at
13258 least 3.2.1) incorrectly generate DW_TAG_variable
13259 tags for them instead. */
13260 dwarf2_add_field (&fi
, child_die
, cu
);
13262 else if (child_die
->tag
== DW_TAG_subprogram
)
13264 /* C++ member function. */
13265 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13267 else if (child_die
->tag
== DW_TAG_inheritance
)
13269 /* C++ base class field. */
13270 dwarf2_add_field (&fi
, child_die
, cu
);
13272 else if (child_die
->tag
== DW_TAG_typedef
)
13273 dwarf2_add_typedef (&fi
, child_die
, cu
);
13274 else if (child_die
->tag
== DW_TAG_template_type_param
13275 || child_die
->tag
== DW_TAG_template_value_param
)
13277 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13280 VEC_safe_push (symbolp
, template_args
, arg
);
13283 child_die
= sibling_die (child_die
);
13286 /* Attach template arguments to type. */
13287 if (! VEC_empty (symbolp
, template_args
))
13289 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13290 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13291 = VEC_length (symbolp
, template_args
);
13292 TYPE_TEMPLATE_ARGUMENTS (type
)
13293 = obstack_alloc (&objfile
->objfile_obstack
,
13294 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13295 * sizeof (struct symbol
*)));
13296 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13297 VEC_address (symbolp
, template_args
),
13298 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13299 * sizeof (struct symbol
*)));
13300 VEC_free (symbolp
, template_args
);
13303 /* Attach fields and member functions to the type. */
13305 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13308 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13310 /* Get the type which refers to the base class (possibly this
13311 class itself) which contains the vtable pointer for the current
13312 class from the DW_AT_containing_type attribute. This use of
13313 DW_AT_containing_type is a GNU extension. */
13315 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13317 struct type
*t
= die_containing_type (die
, cu
);
13319 set_type_vptr_basetype (type
, t
);
13324 /* Our own class provides vtbl ptr. */
13325 for (i
= TYPE_NFIELDS (t
) - 1;
13326 i
>= TYPE_N_BASECLASSES (t
);
13329 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13331 if (is_vtable_name (fieldname
, cu
))
13333 set_type_vptr_fieldno (type
, i
);
13338 /* Complain if virtual function table field not found. */
13339 if (i
< TYPE_N_BASECLASSES (t
))
13340 complaint (&symfile_complaints
,
13341 _("virtual function table pointer "
13342 "not found when defining class '%s'"),
13343 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13348 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13351 else if (cu
->producer
13352 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13354 /* The IBM XLC compiler does not provide direct indication
13355 of the containing type, but the vtable pointer is
13356 always named __vfp. */
13360 for (i
= TYPE_NFIELDS (type
) - 1;
13361 i
>= TYPE_N_BASECLASSES (type
);
13364 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13366 set_type_vptr_fieldno (type
, i
);
13367 set_type_vptr_basetype (type
, type
);
13374 /* Copy fi.typedef_field_list linked list elements content into the
13375 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13376 if (fi
.typedef_field_list
)
13378 int i
= fi
.typedef_field_list_count
;
13380 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13381 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13382 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13383 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13385 /* Reverse the list order to keep the debug info elements order. */
13388 struct typedef_field
*dest
, *src
;
13390 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13391 src
= &fi
.typedef_field_list
->field
;
13392 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13397 do_cleanups (back_to
);
13399 if (HAVE_CPLUS_STRUCT (type
))
13400 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13403 quirk_gcc_member_function_pointer (type
, objfile
);
13405 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13406 snapshots) has been known to create a die giving a declaration
13407 for a class that has, as a child, a die giving a definition for a
13408 nested class. So we have to process our children even if the
13409 current die is a declaration. Normally, of course, a declaration
13410 won't have any children at all. */
13412 child_die
= die
->child
;
13414 while (child_die
!= NULL
&& child_die
->tag
)
13416 if (child_die
->tag
== DW_TAG_member
13417 || child_die
->tag
== DW_TAG_variable
13418 || child_die
->tag
== DW_TAG_inheritance
13419 || child_die
->tag
== DW_TAG_template_value_param
13420 || child_die
->tag
== DW_TAG_template_type_param
)
13425 process_die (child_die
, cu
);
13427 child_die
= sibling_die (child_die
);
13430 /* Do not consider external references. According to the DWARF standard,
13431 these DIEs are identified by the fact that they have no byte_size
13432 attribute, and a declaration attribute. */
13433 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13434 || !die_is_declaration (die
, cu
))
13435 new_symbol (die
, type
, cu
);
13438 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13439 update TYPE using some information only available in DIE's children. */
13442 update_enumeration_type_from_children (struct die_info
*die
,
13444 struct dwarf2_cu
*cu
)
13446 struct obstack obstack
;
13447 struct die_info
*child_die
;
13448 int unsigned_enum
= 1;
13451 struct cleanup
*old_chain
;
13453 obstack_init (&obstack
);
13454 old_chain
= make_cleanup_obstack_free (&obstack
);
13456 for (child_die
= die
->child
;
13457 child_die
!= NULL
&& child_die
->tag
;
13458 child_die
= sibling_die (child_die
))
13460 struct attribute
*attr
;
13462 const gdb_byte
*bytes
;
13463 struct dwarf2_locexpr_baton
*baton
;
13466 if (child_die
->tag
!= DW_TAG_enumerator
)
13469 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13473 name
= dwarf2_name (child_die
, cu
);
13475 name
= "<anonymous enumerator>";
13477 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13478 &value
, &bytes
, &baton
);
13484 else if ((mask
& value
) != 0)
13489 /* If we already know that the enum type is neither unsigned, nor
13490 a flag type, no need to look at the rest of the enumerates. */
13491 if (!unsigned_enum
&& !flag_enum
)
13496 TYPE_UNSIGNED (type
) = 1;
13498 TYPE_FLAG_ENUM (type
) = 1;
13500 do_cleanups (old_chain
);
13503 /* Given a DW_AT_enumeration_type die, set its type. We do not
13504 complete the type's fields yet, or create any symbols. */
13506 static struct type
*
13507 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13509 struct objfile
*objfile
= cu
->objfile
;
13511 struct attribute
*attr
;
13514 /* If the definition of this type lives in .debug_types, read that type.
13515 Don't follow DW_AT_specification though, that will take us back up
13516 the chain and we want to go down. */
13517 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13520 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13522 /* The type's CU may not be the same as CU.
13523 Ensure TYPE is recorded with CU in die_type_hash. */
13524 return set_die_type (die
, type
, cu
);
13527 type
= alloc_type (objfile
);
13529 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13530 name
= dwarf2_full_name (NULL
, die
, cu
);
13532 TYPE_TAG_NAME (type
) = name
;
13534 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13537 struct type
*underlying_type
= die_type (die
, cu
);
13539 TYPE_TARGET_TYPE (type
) = underlying_type
;
13542 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13545 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13549 TYPE_LENGTH (type
) = 0;
13552 /* The enumeration DIE can be incomplete. In Ada, any type can be
13553 declared as private in the package spec, and then defined only
13554 inside the package body. Such types are known as Taft Amendment
13555 Types. When another package uses such a type, an incomplete DIE
13556 may be generated by the compiler. */
13557 if (die_is_declaration (die
, cu
))
13558 TYPE_STUB (type
) = 1;
13560 /* Finish the creation of this type by using the enum's children.
13561 We must call this even when the underlying type has been provided
13562 so that we can determine if we're looking at a "flag" enum. */
13563 update_enumeration_type_from_children (die
, type
, cu
);
13565 /* If this type has an underlying type that is not a stub, then we
13566 may use its attributes. We always use the "unsigned" attribute
13567 in this situation, because ordinarily we guess whether the type
13568 is unsigned -- but the guess can be wrong and the underlying type
13569 can tell us the reality. However, we defer to a local size
13570 attribute if one exists, because this lets the compiler override
13571 the underlying type if needed. */
13572 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13574 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13575 if (TYPE_LENGTH (type
) == 0)
13576 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13579 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13581 return set_die_type (die
, type
, cu
);
13584 /* Given a pointer to a die which begins an enumeration, process all
13585 the dies that define the members of the enumeration, and create the
13586 symbol for the enumeration type.
13588 NOTE: We reverse the order of the element list. */
13591 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13593 struct type
*this_type
;
13595 this_type
= get_die_type (die
, cu
);
13596 if (this_type
== NULL
)
13597 this_type
= read_enumeration_type (die
, cu
);
13599 if (die
->child
!= NULL
)
13601 struct die_info
*child_die
;
13602 struct symbol
*sym
;
13603 struct field
*fields
= NULL
;
13604 int num_fields
= 0;
13607 child_die
= die
->child
;
13608 while (child_die
&& child_die
->tag
)
13610 if (child_die
->tag
!= DW_TAG_enumerator
)
13612 process_die (child_die
, cu
);
13616 name
= dwarf2_name (child_die
, cu
);
13619 sym
= new_symbol (child_die
, this_type
, cu
);
13621 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13623 fields
= (struct field
*)
13625 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13626 * sizeof (struct field
));
13629 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13630 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13631 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13632 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13638 child_die
= sibling_die (child_die
);
13643 TYPE_NFIELDS (this_type
) = num_fields
;
13644 TYPE_FIELDS (this_type
) = (struct field
*)
13645 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13646 memcpy (TYPE_FIELDS (this_type
), fields
,
13647 sizeof (struct field
) * num_fields
);
13652 /* If we are reading an enum from a .debug_types unit, and the enum
13653 is a declaration, and the enum is not the signatured type in the
13654 unit, then we do not want to add a symbol for it. Adding a
13655 symbol would in some cases obscure the true definition of the
13656 enum, giving users an incomplete type when the definition is
13657 actually available. Note that we do not want to do this for all
13658 enums which are just declarations, because C++0x allows forward
13659 enum declarations. */
13660 if (cu
->per_cu
->is_debug_types
13661 && die_is_declaration (die
, cu
))
13663 struct signatured_type
*sig_type
;
13665 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13666 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13667 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13671 new_symbol (die
, this_type
, cu
);
13674 /* Extract all information from a DW_TAG_array_type DIE and put it in
13675 the DIE's type field. For now, this only handles one dimensional
13678 static struct type
*
13679 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13681 struct objfile
*objfile
= cu
->objfile
;
13682 struct die_info
*child_die
;
13684 struct type
*element_type
, *range_type
, *index_type
;
13685 struct type
**range_types
= NULL
;
13686 struct attribute
*attr
;
13688 struct cleanup
*back_to
;
13690 unsigned int bit_stride
= 0;
13692 element_type
= die_type (die
, cu
);
13694 /* The die_type call above may have already set the type for this DIE. */
13695 type
= get_die_type (die
, cu
);
13699 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13701 bit_stride
= DW_UNSND (attr
) * 8;
13703 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13705 bit_stride
= DW_UNSND (attr
);
13707 /* Irix 6.2 native cc creates array types without children for
13708 arrays with unspecified length. */
13709 if (die
->child
== NULL
)
13711 index_type
= objfile_type (objfile
)->builtin_int
;
13712 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13713 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13715 return set_die_type (die
, type
, cu
);
13718 back_to
= make_cleanup (null_cleanup
, NULL
);
13719 child_die
= die
->child
;
13720 while (child_die
&& child_die
->tag
)
13722 if (child_die
->tag
== DW_TAG_subrange_type
)
13724 struct type
*child_type
= read_type_die (child_die
, cu
);
13726 if (child_type
!= NULL
)
13728 /* The range type was succesfully read. Save it for the
13729 array type creation. */
13730 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13732 range_types
= (struct type
**)
13733 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13734 * sizeof (struct type
*));
13736 make_cleanup (free_current_contents
, &range_types
);
13738 range_types
[ndim
++] = child_type
;
13741 child_die
= sibling_die (child_die
);
13744 /* Dwarf2 dimensions are output from left to right, create the
13745 necessary array types in backwards order. */
13747 type
= element_type
;
13749 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13754 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13760 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13764 /* Understand Dwarf2 support for vector types (like they occur on
13765 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13766 array type. This is not part of the Dwarf2/3 standard yet, but a
13767 custom vendor extension. The main difference between a regular
13768 array and the vector variant is that vectors are passed by value
13770 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13772 make_vector_type (type
);
13774 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13775 implementation may choose to implement triple vectors using this
13777 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13780 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13781 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13783 complaint (&symfile_complaints
,
13784 _("DW_AT_byte_size for array type smaller "
13785 "than the total size of elements"));
13788 name
= dwarf2_name (die
, cu
);
13790 TYPE_NAME (type
) = name
;
13792 /* Install the type in the die. */
13793 set_die_type (die
, type
, cu
);
13795 /* set_die_type should be already done. */
13796 set_descriptive_type (type
, die
, cu
);
13798 do_cleanups (back_to
);
13803 static enum dwarf_array_dim_ordering
13804 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13806 struct attribute
*attr
;
13808 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13810 if (attr
) return DW_SND (attr
);
13812 /* GNU F77 is a special case, as at 08/2004 array type info is the
13813 opposite order to the dwarf2 specification, but data is still
13814 laid out as per normal fortran.
13816 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13817 version checking. */
13819 if (cu
->language
== language_fortran
13820 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13822 return DW_ORD_row_major
;
13825 switch (cu
->language_defn
->la_array_ordering
)
13827 case array_column_major
:
13828 return DW_ORD_col_major
;
13829 case array_row_major
:
13831 return DW_ORD_row_major
;
13835 /* Extract all information from a DW_TAG_set_type DIE and put it in
13836 the DIE's type field. */
13838 static struct type
*
13839 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13841 struct type
*domain_type
, *set_type
;
13842 struct attribute
*attr
;
13844 domain_type
= die_type (die
, cu
);
13846 /* The die_type call above may have already set the type for this DIE. */
13847 set_type
= get_die_type (die
, cu
);
13851 set_type
= create_set_type (NULL
, domain_type
);
13853 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13855 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13857 return set_die_type (die
, set_type
, cu
);
13860 /* A helper for read_common_block that creates a locexpr baton.
13861 SYM is the symbol which we are marking as computed.
13862 COMMON_DIE is the DIE for the common block.
13863 COMMON_LOC is the location expression attribute for the common
13865 MEMBER_LOC is the location expression attribute for the particular
13866 member of the common block that we are processing.
13867 CU is the CU from which the above come. */
13870 mark_common_block_symbol_computed (struct symbol
*sym
,
13871 struct die_info
*common_die
,
13872 struct attribute
*common_loc
,
13873 struct attribute
*member_loc
,
13874 struct dwarf2_cu
*cu
)
13876 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13877 struct dwarf2_locexpr_baton
*baton
;
13879 unsigned int cu_off
;
13880 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13881 LONGEST offset
= 0;
13883 gdb_assert (common_loc
&& member_loc
);
13884 gdb_assert (attr_form_is_block (common_loc
));
13885 gdb_assert (attr_form_is_block (member_loc
)
13886 || attr_form_is_constant (member_loc
));
13888 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13889 sizeof (struct dwarf2_locexpr_baton
));
13890 baton
->per_cu
= cu
->per_cu
;
13891 gdb_assert (baton
->per_cu
);
13893 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13895 if (attr_form_is_constant (member_loc
))
13897 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13898 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13901 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13903 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13906 *ptr
++ = DW_OP_call4
;
13907 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13908 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13911 if (attr_form_is_constant (member_loc
))
13913 *ptr
++ = DW_OP_addr
;
13914 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13915 ptr
+= cu
->header
.addr_size
;
13919 /* We have to copy the data here, because DW_OP_call4 will only
13920 use a DW_AT_location attribute. */
13921 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13922 ptr
+= DW_BLOCK (member_loc
)->size
;
13925 *ptr
++ = DW_OP_plus
;
13926 gdb_assert (ptr
- baton
->data
== baton
->size
);
13928 SYMBOL_LOCATION_BATON (sym
) = baton
;
13929 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13932 /* Create appropriate locally-scoped variables for all the
13933 DW_TAG_common_block entries. Also create a struct common_block
13934 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13935 is used to sepate the common blocks name namespace from regular
13939 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13941 struct attribute
*attr
;
13943 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13946 /* Support the .debug_loc offsets. */
13947 if (attr_form_is_block (attr
))
13951 else if (attr_form_is_section_offset (attr
))
13953 dwarf2_complex_location_expr_complaint ();
13958 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13959 "common block member");
13964 if (die
->child
!= NULL
)
13966 struct objfile
*objfile
= cu
->objfile
;
13967 struct die_info
*child_die
;
13968 size_t n_entries
= 0, size
;
13969 struct common_block
*common_block
;
13970 struct symbol
*sym
;
13972 for (child_die
= die
->child
;
13973 child_die
&& child_die
->tag
;
13974 child_die
= sibling_die (child_die
))
13977 size
= (sizeof (struct common_block
)
13978 + (n_entries
- 1) * sizeof (struct symbol
*));
13979 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13980 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13981 common_block
->n_entries
= 0;
13983 for (child_die
= die
->child
;
13984 child_die
&& child_die
->tag
;
13985 child_die
= sibling_die (child_die
))
13987 /* Create the symbol in the DW_TAG_common_block block in the current
13989 sym
= new_symbol (child_die
, NULL
, cu
);
13992 struct attribute
*member_loc
;
13994 common_block
->contents
[common_block
->n_entries
++] = sym
;
13996 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14000 /* GDB has handled this for a long time, but it is
14001 not specified by DWARF. It seems to have been
14002 emitted by gfortran at least as recently as:
14003 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14004 complaint (&symfile_complaints
,
14005 _("Variable in common block has "
14006 "DW_AT_data_member_location "
14007 "- DIE at 0x%x [in module %s]"),
14008 child_die
->offset
.sect_off
,
14009 objfile_name (cu
->objfile
));
14011 if (attr_form_is_section_offset (member_loc
))
14012 dwarf2_complex_location_expr_complaint ();
14013 else if (attr_form_is_constant (member_loc
)
14014 || attr_form_is_block (member_loc
))
14017 mark_common_block_symbol_computed (sym
, die
, attr
,
14021 dwarf2_complex_location_expr_complaint ();
14026 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14027 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14031 /* Create a type for a C++ namespace. */
14033 static struct type
*
14034 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14036 struct objfile
*objfile
= cu
->objfile
;
14037 const char *previous_prefix
, *name
;
14041 /* For extensions, reuse the type of the original namespace. */
14042 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14044 struct die_info
*ext_die
;
14045 struct dwarf2_cu
*ext_cu
= cu
;
14047 ext_die
= dwarf2_extension (die
, &ext_cu
);
14048 type
= read_type_die (ext_die
, ext_cu
);
14050 /* EXT_CU may not be the same as CU.
14051 Ensure TYPE is recorded with CU in die_type_hash. */
14052 return set_die_type (die
, type
, cu
);
14055 name
= namespace_name (die
, &is_anonymous
, cu
);
14057 /* Now build the name of the current namespace. */
14059 previous_prefix
= determine_prefix (die
, cu
);
14060 if (previous_prefix
[0] != '\0')
14061 name
= typename_concat (&objfile
->objfile_obstack
,
14062 previous_prefix
, name
, 0, cu
);
14064 /* Create the type. */
14065 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14067 TYPE_NAME (type
) = name
;
14068 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14070 return set_die_type (die
, type
, cu
);
14073 /* Read a C++ namespace. */
14076 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14078 struct objfile
*objfile
= cu
->objfile
;
14081 /* Add a symbol associated to this if we haven't seen the namespace
14082 before. Also, add a using directive if it's an anonymous
14085 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14089 type
= read_type_die (die
, cu
);
14090 new_symbol (die
, type
, cu
);
14092 namespace_name (die
, &is_anonymous
, cu
);
14095 const char *previous_prefix
= determine_prefix (die
, cu
);
14097 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
14098 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14102 if (die
->child
!= NULL
)
14104 struct die_info
*child_die
= die
->child
;
14106 while (child_die
&& child_die
->tag
)
14108 process_die (child_die
, cu
);
14109 child_die
= sibling_die (child_die
);
14114 /* Read a Fortran module as type. This DIE can be only a declaration used for
14115 imported module. Still we need that type as local Fortran "use ... only"
14116 declaration imports depend on the created type in determine_prefix. */
14118 static struct type
*
14119 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14121 struct objfile
*objfile
= cu
->objfile
;
14122 const char *module_name
;
14125 module_name
= dwarf2_name (die
, cu
);
14127 complaint (&symfile_complaints
,
14128 _("DW_TAG_module has no name, offset 0x%x"),
14129 die
->offset
.sect_off
);
14130 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14132 /* determine_prefix uses TYPE_TAG_NAME. */
14133 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14135 return set_die_type (die
, type
, cu
);
14138 /* Read a Fortran module. */
14141 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14143 struct die_info
*child_die
= die
->child
;
14146 type
= read_type_die (die
, cu
);
14147 new_symbol (die
, type
, cu
);
14149 while (child_die
&& child_die
->tag
)
14151 process_die (child_die
, cu
);
14152 child_die
= sibling_die (child_die
);
14156 /* Return the name of the namespace represented by DIE. Set
14157 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14160 static const char *
14161 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14163 struct die_info
*current_die
;
14164 const char *name
= NULL
;
14166 /* Loop through the extensions until we find a name. */
14168 for (current_die
= die
;
14169 current_die
!= NULL
;
14170 current_die
= dwarf2_extension (die
, &cu
))
14172 /* We don't use dwarf2_name here so that we can detect the absence
14173 of a name -> anonymous namespace. */
14174 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14177 name
= DW_STRING (attr
);
14182 /* Is it an anonymous namespace? */
14184 *is_anonymous
= (name
== NULL
);
14186 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14191 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14192 the user defined type vector. */
14194 static struct type
*
14195 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14197 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14198 struct comp_unit_head
*cu_header
= &cu
->header
;
14200 struct attribute
*attr_byte_size
;
14201 struct attribute
*attr_address_class
;
14202 int byte_size
, addr_class
;
14203 struct type
*target_type
;
14205 target_type
= die_type (die
, cu
);
14207 /* The die_type call above may have already set the type for this DIE. */
14208 type
= get_die_type (die
, cu
);
14212 type
= lookup_pointer_type (target_type
);
14214 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14215 if (attr_byte_size
)
14216 byte_size
= DW_UNSND (attr_byte_size
);
14218 byte_size
= cu_header
->addr_size
;
14220 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14221 if (attr_address_class
)
14222 addr_class
= DW_UNSND (attr_address_class
);
14224 addr_class
= DW_ADDR_none
;
14226 /* If the pointer size or address class is different than the
14227 default, create a type variant marked as such and set the
14228 length accordingly. */
14229 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14231 if (gdbarch_address_class_type_flags_p (gdbarch
))
14235 type_flags
= gdbarch_address_class_type_flags
14236 (gdbarch
, byte_size
, addr_class
);
14237 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14239 type
= make_type_with_address_space (type
, type_flags
);
14241 else if (TYPE_LENGTH (type
) != byte_size
)
14243 complaint (&symfile_complaints
,
14244 _("invalid pointer size %d"), byte_size
);
14248 /* Should we also complain about unhandled address classes? */
14252 TYPE_LENGTH (type
) = byte_size
;
14253 return set_die_type (die
, type
, cu
);
14256 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14257 the user defined type vector. */
14259 static struct type
*
14260 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14263 struct type
*to_type
;
14264 struct type
*domain
;
14266 to_type
= die_type (die
, cu
);
14267 domain
= die_containing_type (die
, cu
);
14269 /* The calls above may have already set the type for this DIE. */
14270 type
= get_die_type (die
, cu
);
14274 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14275 type
= lookup_methodptr_type (to_type
);
14276 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14278 struct type
*new_type
= alloc_type (cu
->objfile
);
14280 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14281 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14282 TYPE_VARARGS (to_type
));
14283 type
= lookup_methodptr_type (new_type
);
14286 type
= lookup_memberptr_type (to_type
, domain
);
14288 return set_die_type (die
, type
, cu
);
14291 /* Extract all information from a DW_TAG_reference_type DIE and add to
14292 the user defined type vector. */
14294 static struct type
*
14295 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14297 struct comp_unit_head
*cu_header
= &cu
->header
;
14298 struct type
*type
, *target_type
;
14299 struct attribute
*attr
;
14301 target_type
= die_type (die
, cu
);
14303 /* The die_type call above may have already set the type for this DIE. */
14304 type
= get_die_type (die
, cu
);
14308 type
= lookup_reference_type (target_type
);
14309 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14312 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14316 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14318 return set_die_type (die
, type
, cu
);
14321 /* Add the given cv-qualifiers to the element type of the array. GCC
14322 outputs DWARF type qualifiers that apply to an array, not the
14323 element type. But GDB relies on the array element type to carry
14324 the cv-qualifiers. This mimics section 6.7.3 of the C99
14327 static struct type
*
14328 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14329 struct type
*base_type
, int cnst
, int voltl
)
14331 struct type
*el_type
, *inner_array
;
14333 base_type
= copy_type (base_type
);
14334 inner_array
= base_type
;
14336 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14338 TYPE_TARGET_TYPE (inner_array
) =
14339 copy_type (TYPE_TARGET_TYPE (inner_array
));
14340 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14343 el_type
= TYPE_TARGET_TYPE (inner_array
);
14344 cnst
|= TYPE_CONST (el_type
);
14345 voltl
|= TYPE_VOLATILE (el_type
);
14346 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14348 return set_die_type (die
, base_type
, cu
);
14351 static struct type
*
14352 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14354 struct type
*base_type
, *cv_type
;
14356 base_type
= die_type (die
, cu
);
14358 /* The die_type call above may have already set the type for this DIE. */
14359 cv_type
= get_die_type (die
, cu
);
14363 /* In case the const qualifier is applied to an array type, the element type
14364 is so qualified, not the array type (section 6.7.3 of C99). */
14365 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14366 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14368 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14369 return set_die_type (die
, cv_type
, cu
);
14372 static struct type
*
14373 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14375 struct type
*base_type
, *cv_type
;
14377 base_type
= die_type (die
, cu
);
14379 /* The die_type call above may have already set the type for this DIE. */
14380 cv_type
= get_die_type (die
, cu
);
14384 /* In case the volatile qualifier is applied to an array type, the
14385 element type is so qualified, not the array type (section 6.7.3
14387 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14388 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14390 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14391 return set_die_type (die
, cv_type
, cu
);
14394 /* Handle DW_TAG_restrict_type. */
14396 static struct type
*
14397 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14399 struct type
*base_type
, *cv_type
;
14401 base_type
= die_type (die
, cu
);
14403 /* The die_type call above may have already set the type for this DIE. */
14404 cv_type
= get_die_type (die
, cu
);
14408 cv_type
= make_restrict_type (base_type
);
14409 return set_die_type (die
, cv_type
, cu
);
14412 /* Handle DW_TAG_atomic_type. */
14414 static struct type
*
14415 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14417 struct type
*base_type
, *cv_type
;
14419 base_type
= die_type (die
, cu
);
14421 /* The die_type call above may have already set the type for this DIE. */
14422 cv_type
= get_die_type (die
, cu
);
14426 cv_type
= make_atomic_type (base_type
);
14427 return set_die_type (die
, cv_type
, cu
);
14430 /* Extract all information from a DW_TAG_string_type DIE and add to
14431 the user defined type vector. It isn't really a user defined type,
14432 but it behaves like one, with other DIE's using an AT_user_def_type
14433 attribute to reference it. */
14435 static struct type
*
14436 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14438 struct objfile
*objfile
= cu
->objfile
;
14439 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14440 struct type
*type
, *range_type
, *index_type
, *char_type
;
14441 struct attribute
*attr
;
14442 unsigned int length
;
14444 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14447 length
= DW_UNSND (attr
);
14451 /* Check for the DW_AT_byte_size attribute. */
14452 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14455 length
= DW_UNSND (attr
);
14463 index_type
= objfile_type (objfile
)->builtin_int
;
14464 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14465 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14466 type
= create_string_type (NULL
, char_type
, range_type
);
14468 return set_die_type (die
, type
, cu
);
14471 /* Assuming that DIE corresponds to a function, returns nonzero
14472 if the function is prototyped. */
14475 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14477 struct attribute
*attr
;
14479 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14480 if (attr
&& (DW_UNSND (attr
) != 0))
14483 /* The DWARF standard implies that the DW_AT_prototyped attribute
14484 is only meaninful for C, but the concept also extends to other
14485 languages that allow unprototyped functions (Eg: Objective C).
14486 For all other languages, assume that functions are always
14488 if (cu
->language
!= language_c
14489 && cu
->language
!= language_objc
14490 && cu
->language
!= language_opencl
)
14493 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14494 prototyped and unprototyped functions; default to prototyped,
14495 since that is more common in modern code (and RealView warns
14496 about unprototyped functions). */
14497 if (producer_is_realview (cu
->producer
))
14503 /* Handle DIES due to C code like:
14507 int (*funcp)(int a, long l);
14511 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14513 static struct type
*
14514 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14516 struct objfile
*objfile
= cu
->objfile
;
14517 struct type
*type
; /* Type that this function returns. */
14518 struct type
*ftype
; /* Function that returns above type. */
14519 struct attribute
*attr
;
14521 type
= die_type (die
, cu
);
14523 /* The die_type call above may have already set the type for this DIE. */
14524 ftype
= get_die_type (die
, cu
);
14528 ftype
= lookup_function_type (type
);
14530 if (prototyped_function_p (die
, cu
))
14531 TYPE_PROTOTYPED (ftype
) = 1;
14533 /* Store the calling convention in the type if it's available in
14534 the subroutine die. Otherwise set the calling convention to
14535 the default value DW_CC_normal. */
14536 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14538 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14539 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14540 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14542 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14544 /* Record whether the function returns normally to its caller or not
14545 if the DWARF producer set that information. */
14546 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14547 if (attr
&& (DW_UNSND (attr
) != 0))
14548 TYPE_NO_RETURN (ftype
) = 1;
14550 /* We need to add the subroutine type to the die immediately so
14551 we don't infinitely recurse when dealing with parameters
14552 declared as the same subroutine type. */
14553 set_die_type (die
, ftype
, cu
);
14555 if (die
->child
!= NULL
)
14557 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14558 struct die_info
*child_die
;
14559 int nparams
, iparams
;
14561 /* Count the number of parameters.
14562 FIXME: GDB currently ignores vararg functions, but knows about
14563 vararg member functions. */
14565 child_die
= die
->child
;
14566 while (child_die
&& child_die
->tag
)
14568 if (child_die
->tag
== DW_TAG_formal_parameter
)
14570 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14571 TYPE_VARARGS (ftype
) = 1;
14572 child_die
= sibling_die (child_die
);
14575 /* Allocate storage for parameters and fill them in. */
14576 TYPE_NFIELDS (ftype
) = nparams
;
14577 TYPE_FIELDS (ftype
) = (struct field
*)
14578 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14580 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14581 even if we error out during the parameters reading below. */
14582 for (iparams
= 0; iparams
< nparams
; iparams
++)
14583 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14586 child_die
= die
->child
;
14587 while (child_die
&& child_die
->tag
)
14589 if (child_die
->tag
== DW_TAG_formal_parameter
)
14591 struct type
*arg_type
;
14593 /* DWARF version 2 has no clean way to discern C++
14594 static and non-static member functions. G++ helps
14595 GDB by marking the first parameter for non-static
14596 member functions (which is the this pointer) as
14597 artificial. We pass this information to
14598 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14600 DWARF version 3 added DW_AT_object_pointer, which GCC
14601 4.5 does not yet generate. */
14602 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14604 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14607 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14609 /* GCC/43521: In java, the formal parameter
14610 "this" is sometimes not marked with DW_AT_artificial. */
14611 if (cu
->language
== language_java
)
14613 const char *name
= dwarf2_name (child_die
, cu
);
14615 if (name
&& !strcmp (name
, "this"))
14616 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14619 arg_type
= die_type (child_die
, cu
);
14621 /* RealView does not mark THIS as const, which the testsuite
14622 expects. GCC marks THIS as const in method definitions,
14623 but not in the class specifications (GCC PR 43053). */
14624 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14625 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14628 struct dwarf2_cu
*arg_cu
= cu
;
14629 const char *name
= dwarf2_name (child_die
, cu
);
14631 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14634 /* If the compiler emits this, use it. */
14635 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14638 else if (name
&& strcmp (name
, "this") == 0)
14639 /* Function definitions will have the argument names. */
14641 else if (name
== NULL
&& iparams
== 0)
14642 /* Declarations may not have the names, so like
14643 elsewhere in GDB, assume an artificial first
14644 argument is "this". */
14648 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14652 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14655 child_die
= sibling_die (child_die
);
14662 static struct type
*
14663 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14665 struct objfile
*objfile
= cu
->objfile
;
14666 const char *name
= NULL
;
14667 struct type
*this_type
, *target_type
;
14669 name
= dwarf2_full_name (NULL
, die
, cu
);
14670 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14671 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14672 TYPE_NAME (this_type
) = name
;
14673 set_die_type (die
, this_type
, cu
);
14674 target_type
= die_type (die
, cu
);
14675 if (target_type
!= this_type
)
14676 TYPE_TARGET_TYPE (this_type
) = target_type
;
14679 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14680 spec and cause infinite loops in GDB. */
14681 complaint (&symfile_complaints
,
14682 _("Self-referential DW_TAG_typedef "
14683 "- DIE at 0x%x [in module %s]"),
14684 die
->offset
.sect_off
, objfile_name (objfile
));
14685 TYPE_TARGET_TYPE (this_type
) = NULL
;
14690 /* Find a representation of a given base type and install
14691 it in the TYPE field of the die. */
14693 static struct type
*
14694 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14696 struct objfile
*objfile
= cu
->objfile
;
14698 struct attribute
*attr
;
14699 int encoding
= 0, size
= 0;
14701 enum type_code code
= TYPE_CODE_INT
;
14702 int type_flags
= 0;
14703 struct type
*target_type
= NULL
;
14705 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14708 encoding
= DW_UNSND (attr
);
14710 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14713 size
= DW_UNSND (attr
);
14715 name
= dwarf2_name (die
, cu
);
14718 complaint (&symfile_complaints
,
14719 _("DW_AT_name missing from DW_TAG_base_type"));
14724 case DW_ATE_address
:
14725 /* Turn DW_ATE_address into a void * pointer. */
14726 code
= TYPE_CODE_PTR
;
14727 type_flags
|= TYPE_FLAG_UNSIGNED
;
14728 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14730 case DW_ATE_boolean
:
14731 code
= TYPE_CODE_BOOL
;
14732 type_flags
|= TYPE_FLAG_UNSIGNED
;
14734 case DW_ATE_complex_float
:
14735 code
= TYPE_CODE_COMPLEX
;
14736 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14738 case DW_ATE_decimal_float
:
14739 code
= TYPE_CODE_DECFLOAT
;
14742 code
= TYPE_CODE_FLT
;
14744 case DW_ATE_signed
:
14746 case DW_ATE_unsigned
:
14747 type_flags
|= TYPE_FLAG_UNSIGNED
;
14748 if (cu
->language
== language_fortran
14750 && startswith (name
, "character("))
14751 code
= TYPE_CODE_CHAR
;
14753 case DW_ATE_signed_char
:
14754 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14755 || cu
->language
== language_pascal
14756 || cu
->language
== language_fortran
)
14757 code
= TYPE_CODE_CHAR
;
14759 case DW_ATE_unsigned_char
:
14760 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14761 || cu
->language
== language_pascal
14762 || cu
->language
== language_fortran
)
14763 code
= TYPE_CODE_CHAR
;
14764 type_flags
|= TYPE_FLAG_UNSIGNED
;
14767 /* We just treat this as an integer and then recognize the
14768 type by name elsewhere. */
14772 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14773 dwarf_type_encoding_name (encoding
));
14777 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14778 TYPE_NAME (type
) = name
;
14779 TYPE_TARGET_TYPE (type
) = target_type
;
14781 if (name
&& strcmp (name
, "char") == 0)
14782 TYPE_NOSIGN (type
) = 1;
14784 return set_die_type (die
, type
, cu
);
14787 /* Parse dwarf attribute if it's a block, reference or constant and put the
14788 resulting value of the attribute into struct bound_prop.
14789 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14792 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14793 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14795 struct dwarf2_property_baton
*baton
;
14796 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14798 if (attr
== NULL
|| prop
== NULL
)
14801 if (attr_form_is_block (attr
))
14803 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14804 baton
->referenced_type
= NULL
;
14805 baton
->locexpr
.per_cu
= cu
->per_cu
;
14806 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14807 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14808 prop
->data
.baton
= baton
;
14809 prop
->kind
= PROP_LOCEXPR
;
14810 gdb_assert (prop
->data
.baton
!= NULL
);
14812 else if (attr_form_is_ref (attr
))
14814 struct dwarf2_cu
*target_cu
= cu
;
14815 struct die_info
*target_die
;
14816 struct attribute
*target_attr
;
14818 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14819 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14820 if (target_attr
== NULL
)
14821 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14823 if (target_attr
== NULL
)
14826 switch (target_attr
->name
)
14828 case DW_AT_location
:
14829 if (attr_form_is_section_offset (target_attr
))
14831 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14832 baton
->referenced_type
= die_type (target_die
, target_cu
);
14833 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14834 prop
->data
.baton
= baton
;
14835 prop
->kind
= PROP_LOCLIST
;
14836 gdb_assert (prop
->data
.baton
!= NULL
);
14838 else if (attr_form_is_block (target_attr
))
14840 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14841 baton
->referenced_type
= die_type (target_die
, target_cu
);
14842 baton
->locexpr
.per_cu
= cu
->per_cu
;
14843 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14844 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14845 prop
->data
.baton
= baton
;
14846 prop
->kind
= PROP_LOCEXPR
;
14847 gdb_assert (prop
->data
.baton
!= NULL
);
14851 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14852 "dynamic property");
14856 case DW_AT_data_member_location
:
14860 if (!handle_data_member_location (target_die
, target_cu
,
14864 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14865 baton
->referenced_type
= read_type_die (target_die
->parent
,
14867 baton
->offset_info
.offset
= offset
;
14868 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14869 prop
->data
.baton
= baton
;
14870 prop
->kind
= PROP_ADDR_OFFSET
;
14875 else if (attr_form_is_constant (attr
))
14877 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14878 prop
->kind
= PROP_CONST
;
14882 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14883 dwarf2_name (die
, cu
));
14890 /* Read the given DW_AT_subrange DIE. */
14892 static struct type
*
14893 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14895 struct type
*base_type
, *orig_base_type
;
14896 struct type
*range_type
;
14897 struct attribute
*attr
;
14898 struct dynamic_prop low
, high
;
14899 int low_default_is_valid
;
14900 int high_bound_is_count
= 0;
14902 LONGEST negative_mask
;
14904 orig_base_type
= die_type (die
, cu
);
14905 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14906 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14907 creating the range type, but we use the result of check_typedef
14908 when examining properties of the type. */
14909 base_type
= check_typedef (orig_base_type
);
14911 /* The die_type call above may have already set the type for this DIE. */
14912 range_type
= get_die_type (die
, cu
);
14916 low
.kind
= PROP_CONST
;
14917 high
.kind
= PROP_CONST
;
14918 high
.data
.const_val
= 0;
14920 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14921 omitting DW_AT_lower_bound. */
14922 switch (cu
->language
)
14925 case language_cplus
:
14926 low
.data
.const_val
= 0;
14927 low_default_is_valid
= 1;
14929 case language_fortran
:
14930 low
.data
.const_val
= 1;
14931 low_default_is_valid
= 1;
14934 case language_java
:
14935 case language_objc
:
14936 low
.data
.const_val
= 0;
14937 low_default_is_valid
= (cu
->header
.version
>= 4);
14941 case language_pascal
:
14942 low
.data
.const_val
= 1;
14943 low_default_is_valid
= (cu
->header
.version
>= 4);
14946 low
.data
.const_val
= 0;
14947 low_default_is_valid
= 0;
14951 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14953 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14954 else if (!low_default_is_valid
)
14955 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14956 "- DIE at 0x%x [in module %s]"),
14957 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14959 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14960 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14962 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14963 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14965 /* If bounds are constant do the final calculation here. */
14966 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14967 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14969 high_bound_is_count
= 1;
14973 /* Dwarf-2 specifications explicitly allows to create subrange types
14974 without specifying a base type.
14975 In that case, the base type must be set to the type of
14976 the lower bound, upper bound or count, in that order, if any of these
14977 three attributes references an object that has a type.
14978 If no base type is found, the Dwarf-2 specifications say that
14979 a signed integer type of size equal to the size of an address should
14981 For the following C code: `extern char gdb_int [];'
14982 GCC produces an empty range DIE.
14983 FIXME: muller/2010-05-28: Possible references to object for low bound,
14984 high bound or count are not yet handled by this code. */
14985 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14987 struct objfile
*objfile
= cu
->objfile
;
14988 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14989 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14990 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14992 /* Test "int", "long int", and "long long int" objfile types,
14993 and select the first one having a size above or equal to the
14994 architecture address size. */
14995 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14996 base_type
= int_type
;
14999 int_type
= objfile_type (objfile
)->builtin_long
;
15000 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15001 base_type
= int_type
;
15004 int_type
= objfile_type (objfile
)->builtin_long_long
;
15005 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15006 base_type
= int_type
;
15011 /* Normally, the DWARF producers are expected to use a signed
15012 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15013 But this is unfortunately not always the case, as witnessed
15014 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15015 is used instead. To work around that ambiguity, we treat
15016 the bounds as signed, and thus sign-extend their values, when
15017 the base type is signed. */
15019 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
15020 if (low
.kind
== PROP_CONST
15021 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15022 low
.data
.const_val
|= negative_mask
;
15023 if (high
.kind
== PROP_CONST
15024 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15025 high
.data
.const_val
|= negative_mask
;
15027 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15029 if (high_bound_is_count
)
15030 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15032 /* Ada expects an empty array on no boundary attributes. */
15033 if (attr
== NULL
&& cu
->language
!= language_ada
)
15034 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15036 name
= dwarf2_name (die
, cu
);
15038 TYPE_NAME (range_type
) = name
;
15040 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15042 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15044 set_die_type (die
, range_type
, cu
);
15046 /* set_die_type should be already done. */
15047 set_descriptive_type (range_type
, die
, cu
);
15052 static struct type
*
15053 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15057 /* For now, we only support the C meaning of an unspecified type: void. */
15059 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15060 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15062 return set_die_type (die
, type
, cu
);
15065 /* Read a single die and all its descendents. Set the die's sibling
15066 field to NULL; set other fields in the die correctly, and set all
15067 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15068 location of the info_ptr after reading all of those dies. PARENT
15069 is the parent of the die in question. */
15071 static struct die_info
*
15072 read_die_and_children (const struct die_reader_specs
*reader
,
15073 const gdb_byte
*info_ptr
,
15074 const gdb_byte
**new_info_ptr
,
15075 struct die_info
*parent
)
15077 struct die_info
*die
;
15078 const gdb_byte
*cur_ptr
;
15081 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15084 *new_info_ptr
= cur_ptr
;
15087 store_in_ref_table (die
, reader
->cu
);
15090 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15094 *new_info_ptr
= cur_ptr
;
15097 die
->sibling
= NULL
;
15098 die
->parent
= parent
;
15102 /* Read a die, all of its descendents, and all of its siblings; set
15103 all of the fields of all of the dies correctly. Arguments are as
15104 in read_die_and_children. */
15106 static struct die_info
*
15107 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15108 const gdb_byte
*info_ptr
,
15109 const gdb_byte
**new_info_ptr
,
15110 struct die_info
*parent
)
15112 struct die_info
*first_die
, *last_sibling
;
15113 const gdb_byte
*cur_ptr
;
15115 cur_ptr
= info_ptr
;
15116 first_die
= last_sibling
= NULL
;
15120 struct die_info
*die
15121 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15125 *new_info_ptr
= cur_ptr
;
15132 last_sibling
->sibling
= die
;
15134 last_sibling
= die
;
15138 /* Read a die, all of its descendents, and all of its siblings; set
15139 all of the fields of all of the dies correctly. Arguments are as
15140 in read_die_and_children.
15141 This the main entry point for reading a DIE and all its children. */
15143 static struct die_info
*
15144 read_die_and_siblings (const struct die_reader_specs
*reader
,
15145 const gdb_byte
*info_ptr
,
15146 const gdb_byte
**new_info_ptr
,
15147 struct die_info
*parent
)
15149 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15150 new_info_ptr
, parent
);
15152 if (dwarf_die_debug
)
15154 fprintf_unfiltered (gdb_stdlog
,
15155 "Read die from %s@0x%x of %s:\n",
15156 get_section_name (reader
->die_section
),
15157 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15158 bfd_get_filename (reader
->abfd
));
15159 dump_die (die
, dwarf_die_debug
);
15165 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15167 The caller is responsible for filling in the extra attributes
15168 and updating (*DIEP)->num_attrs.
15169 Set DIEP to point to a newly allocated die with its information,
15170 except for its child, sibling, and parent fields.
15171 Set HAS_CHILDREN to tell whether the die has children or not. */
15173 static const gdb_byte
*
15174 read_full_die_1 (const struct die_reader_specs
*reader
,
15175 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15176 int *has_children
, int num_extra_attrs
)
15178 unsigned int abbrev_number
, bytes_read
, i
;
15179 sect_offset offset
;
15180 struct abbrev_info
*abbrev
;
15181 struct die_info
*die
;
15182 struct dwarf2_cu
*cu
= reader
->cu
;
15183 bfd
*abfd
= reader
->abfd
;
15185 offset
.sect_off
= info_ptr
- reader
->buffer
;
15186 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15187 info_ptr
+= bytes_read
;
15188 if (!abbrev_number
)
15195 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15197 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15199 bfd_get_filename (abfd
));
15201 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15202 die
->offset
= offset
;
15203 die
->tag
= abbrev
->tag
;
15204 die
->abbrev
= abbrev_number
;
15206 /* Make the result usable.
15207 The caller needs to update num_attrs after adding the extra
15209 die
->num_attrs
= abbrev
->num_attrs
;
15211 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15212 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15216 *has_children
= abbrev
->has_children
;
15220 /* Read a die and all its attributes.
15221 Set DIEP to point to a newly allocated die with its information,
15222 except for its child, sibling, and parent fields.
15223 Set HAS_CHILDREN to tell whether the die has children or not. */
15225 static const gdb_byte
*
15226 read_full_die (const struct die_reader_specs
*reader
,
15227 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15230 const gdb_byte
*result
;
15232 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15234 if (dwarf_die_debug
)
15236 fprintf_unfiltered (gdb_stdlog
,
15237 "Read die from %s@0x%x of %s:\n",
15238 get_section_name (reader
->die_section
),
15239 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15240 bfd_get_filename (reader
->abfd
));
15241 dump_die (*diep
, dwarf_die_debug
);
15247 /* Abbreviation tables.
15249 In DWARF version 2, the description of the debugging information is
15250 stored in a separate .debug_abbrev section. Before we read any
15251 dies from a section we read in all abbreviations and install them
15252 in a hash table. */
15254 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15256 static struct abbrev_info
*
15257 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15259 struct abbrev_info
*abbrev
;
15261 abbrev
= (struct abbrev_info
*)
15262 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15263 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15267 /* Add an abbreviation to the table. */
15270 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15271 unsigned int abbrev_number
,
15272 struct abbrev_info
*abbrev
)
15274 unsigned int hash_number
;
15276 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15277 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15278 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15281 /* Look up an abbrev in the table.
15282 Returns NULL if the abbrev is not found. */
15284 static struct abbrev_info
*
15285 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15286 unsigned int abbrev_number
)
15288 unsigned int hash_number
;
15289 struct abbrev_info
*abbrev
;
15291 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15292 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15296 if (abbrev
->number
== abbrev_number
)
15298 abbrev
= abbrev
->next
;
15303 /* Read in an abbrev table. */
15305 static struct abbrev_table
*
15306 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15307 sect_offset offset
)
15309 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15310 bfd
*abfd
= get_section_bfd_owner (section
);
15311 struct abbrev_table
*abbrev_table
;
15312 const gdb_byte
*abbrev_ptr
;
15313 struct abbrev_info
*cur_abbrev
;
15314 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15315 unsigned int abbrev_form
;
15316 struct attr_abbrev
*cur_attrs
;
15317 unsigned int allocated_attrs
;
15319 abbrev_table
= XNEW (struct abbrev_table
);
15320 abbrev_table
->offset
= offset
;
15321 obstack_init (&abbrev_table
->abbrev_obstack
);
15322 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15324 * sizeof (struct abbrev_info
*)));
15325 memset (abbrev_table
->abbrevs
, 0,
15326 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15328 dwarf2_read_section (objfile
, section
);
15329 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15330 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15331 abbrev_ptr
+= bytes_read
;
15333 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15334 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15336 /* Loop until we reach an abbrev number of 0. */
15337 while (abbrev_number
)
15339 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15341 /* read in abbrev header */
15342 cur_abbrev
->number
= abbrev_number
;
15343 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15344 abbrev_ptr
+= bytes_read
;
15345 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15348 /* now read in declarations */
15349 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15350 abbrev_ptr
+= bytes_read
;
15351 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15352 abbrev_ptr
+= bytes_read
;
15353 while (abbrev_name
)
15355 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15357 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15359 = xrealloc (cur_attrs
, (allocated_attrs
15360 * sizeof (struct attr_abbrev
)));
15363 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
15364 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
15365 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15366 abbrev_ptr
+= bytes_read
;
15367 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15368 abbrev_ptr
+= bytes_read
;
15371 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15372 (cur_abbrev
->num_attrs
15373 * sizeof (struct attr_abbrev
)));
15374 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15375 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15377 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15379 /* Get next abbreviation.
15380 Under Irix6 the abbreviations for a compilation unit are not
15381 always properly terminated with an abbrev number of 0.
15382 Exit loop if we encounter an abbreviation which we have
15383 already read (which means we are about to read the abbreviations
15384 for the next compile unit) or if the end of the abbreviation
15385 table is reached. */
15386 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15388 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15389 abbrev_ptr
+= bytes_read
;
15390 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15395 return abbrev_table
;
15398 /* Free the resources held by ABBREV_TABLE. */
15401 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15403 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15404 xfree (abbrev_table
);
15407 /* Same as abbrev_table_free but as a cleanup.
15408 We pass in a pointer to the pointer to the table so that we can
15409 set the pointer to NULL when we're done. It also simplifies
15410 build_type_psymtabs_1. */
15413 abbrev_table_free_cleanup (void *table_ptr
)
15415 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15417 if (*abbrev_table_ptr
!= NULL
)
15418 abbrev_table_free (*abbrev_table_ptr
);
15419 *abbrev_table_ptr
= NULL
;
15422 /* Read the abbrev table for CU from ABBREV_SECTION. */
15425 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15426 struct dwarf2_section_info
*abbrev_section
)
15429 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15432 /* Release the memory used by the abbrev table for a compilation unit. */
15435 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15437 struct dwarf2_cu
*cu
= ptr_to_cu
;
15439 if (cu
->abbrev_table
!= NULL
)
15440 abbrev_table_free (cu
->abbrev_table
);
15441 /* Set this to NULL so that we SEGV if we try to read it later,
15442 and also because free_comp_unit verifies this is NULL. */
15443 cu
->abbrev_table
= NULL
;
15446 /* Returns nonzero if TAG represents a type that we might generate a partial
15450 is_type_tag_for_partial (int tag
)
15455 /* Some types that would be reasonable to generate partial symbols for,
15456 that we don't at present. */
15457 case DW_TAG_array_type
:
15458 case DW_TAG_file_type
:
15459 case DW_TAG_ptr_to_member_type
:
15460 case DW_TAG_set_type
:
15461 case DW_TAG_string_type
:
15462 case DW_TAG_subroutine_type
:
15464 case DW_TAG_base_type
:
15465 case DW_TAG_class_type
:
15466 case DW_TAG_interface_type
:
15467 case DW_TAG_enumeration_type
:
15468 case DW_TAG_structure_type
:
15469 case DW_TAG_subrange_type
:
15470 case DW_TAG_typedef
:
15471 case DW_TAG_union_type
:
15478 /* Load all DIEs that are interesting for partial symbols into memory. */
15480 static struct partial_die_info
*
15481 load_partial_dies (const struct die_reader_specs
*reader
,
15482 const gdb_byte
*info_ptr
, int building_psymtab
)
15484 struct dwarf2_cu
*cu
= reader
->cu
;
15485 struct objfile
*objfile
= cu
->objfile
;
15486 struct partial_die_info
*part_die
;
15487 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15488 struct abbrev_info
*abbrev
;
15489 unsigned int bytes_read
;
15490 unsigned int load_all
= 0;
15491 int nesting_level
= 1;
15496 gdb_assert (cu
->per_cu
!= NULL
);
15497 if (cu
->per_cu
->load_all_dies
)
15501 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15505 &cu
->comp_unit_obstack
,
15506 hashtab_obstack_allocate
,
15507 dummy_obstack_deallocate
);
15509 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15510 sizeof (struct partial_die_info
));
15514 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15516 /* A NULL abbrev means the end of a series of children. */
15517 if (abbrev
== NULL
)
15519 if (--nesting_level
== 0)
15521 /* PART_DIE was probably the last thing allocated on the
15522 comp_unit_obstack, so we could call obstack_free
15523 here. We don't do that because the waste is small,
15524 and will be cleaned up when we're done with this
15525 compilation unit. This way, we're also more robust
15526 against other users of the comp_unit_obstack. */
15529 info_ptr
+= bytes_read
;
15530 last_die
= parent_die
;
15531 parent_die
= parent_die
->die_parent
;
15535 /* Check for template arguments. We never save these; if
15536 they're seen, we just mark the parent, and go on our way. */
15537 if (parent_die
!= NULL
15538 && cu
->language
== language_cplus
15539 && (abbrev
->tag
== DW_TAG_template_type_param
15540 || abbrev
->tag
== DW_TAG_template_value_param
))
15542 parent_die
->has_template_arguments
= 1;
15546 /* We don't need a partial DIE for the template argument. */
15547 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15552 /* We only recurse into c++ subprograms looking for template arguments.
15553 Skip their other children. */
15555 && cu
->language
== language_cplus
15556 && parent_die
!= NULL
15557 && parent_die
->tag
== DW_TAG_subprogram
)
15559 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15563 /* Check whether this DIE is interesting enough to save. Normally
15564 we would not be interested in members here, but there may be
15565 later variables referencing them via DW_AT_specification (for
15566 static members). */
15568 && !is_type_tag_for_partial (abbrev
->tag
)
15569 && abbrev
->tag
!= DW_TAG_constant
15570 && abbrev
->tag
!= DW_TAG_enumerator
15571 && abbrev
->tag
!= DW_TAG_subprogram
15572 && abbrev
->tag
!= DW_TAG_lexical_block
15573 && abbrev
->tag
!= DW_TAG_variable
15574 && abbrev
->tag
!= DW_TAG_namespace
15575 && abbrev
->tag
!= DW_TAG_module
15576 && abbrev
->tag
!= DW_TAG_member
15577 && abbrev
->tag
!= DW_TAG_imported_unit
15578 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15580 /* Otherwise we skip to the next sibling, if any. */
15581 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15585 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15588 /* This two-pass algorithm for processing partial symbols has a
15589 high cost in cache pressure. Thus, handle some simple cases
15590 here which cover the majority of C partial symbols. DIEs
15591 which neither have specification tags in them, nor could have
15592 specification tags elsewhere pointing at them, can simply be
15593 processed and discarded.
15595 This segment is also optional; scan_partial_symbols and
15596 add_partial_symbol will handle these DIEs if we chain
15597 them in normally. When compilers which do not emit large
15598 quantities of duplicate debug information are more common,
15599 this code can probably be removed. */
15601 /* Any complete simple types at the top level (pretty much all
15602 of them, for a language without namespaces), can be processed
15604 if (parent_die
== NULL
15605 && part_die
->has_specification
== 0
15606 && part_die
->is_declaration
== 0
15607 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15608 || part_die
->tag
== DW_TAG_base_type
15609 || part_die
->tag
== DW_TAG_subrange_type
))
15611 if (building_psymtab
&& part_die
->name
!= NULL
)
15612 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15613 VAR_DOMAIN
, LOC_TYPEDEF
,
15614 &objfile
->static_psymbols
,
15615 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15616 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15620 /* The exception for DW_TAG_typedef with has_children above is
15621 a workaround of GCC PR debug/47510. In the case of this complaint
15622 type_name_no_tag_or_error will error on such types later.
15624 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15625 it could not find the child DIEs referenced later, this is checked
15626 above. In correct DWARF DW_TAG_typedef should have no children. */
15628 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15629 complaint (&symfile_complaints
,
15630 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15631 "- DIE at 0x%x [in module %s]"),
15632 part_die
->offset
.sect_off
, objfile_name (objfile
));
15634 /* If we're at the second level, and we're an enumerator, and
15635 our parent has no specification (meaning possibly lives in a
15636 namespace elsewhere), then we can add the partial symbol now
15637 instead of queueing it. */
15638 if (part_die
->tag
== DW_TAG_enumerator
15639 && parent_die
!= NULL
15640 && parent_die
->die_parent
== NULL
15641 && parent_die
->tag
== DW_TAG_enumeration_type
15642 && parent_die
->has_specification
== 0)
15644 if (part_die
->name
== NULL
)
15645 complaint (&symfile_complaints
,
15646 _("malformed enumerator DIE ignored"));
15647 else if (building_psymtab
)
15648 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15649 VAR_DOMAIN
, LOC_CONST
,
15650 (cu
->language
== language_cplus
15651 || cu
->language
== language_java
)
15652 ? &objfile
->global_psymbols
15653 : &objfile
->static_psymbols
,
15654 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15656 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15660 /* We'll save this DIE so link it in. */
15661 part_die
->die_parent
= parent_die
;
15662 part_die
->die_sibling
= NULL
;
15663 part_die
->die_child
= NULL
;
15665 if (last_die
&& last_die
== parent_die
)
15666 last_die
->die_child
= part_die
;
15668 last_die
->die_sibling
= part_die
;
15670 last_die
= part_die
;
15672 if (first_die
== NULL
)
15673 first_die
= part_die
;
15675 /* Maybe add the DIE to the hash table. Not all DIEs that we
15676 find interesting need to be in the hash table, because we
15677 also have the parent/sibling/child chains; only those that we
15678 might refer to by offset later during partial symbol reading.
15680 For now this means things that might have be the target of a
15681 DW_AT_specification, DW_AT_abstract_origin, or
15682 DW_AT_extension. DW_AT_extension will refer only to
15683 namespaces; DW_AT_abstract_origin refers to functions (and
15684 many things under the function DIE, but we do not recurse
15685 into function DIEs during partial symbol reading) and
15686 possibly variables as well; DW_AT_specification refers to
15687 declarations. Declarations ought to have the DW_AT_declaration
15688 flag. It happens that GCC forgets to put it in sometimes, but
15689 only for functions, not for types.
15691 Adding more things than necessary to the hash table is harmless
15692 except for the performance cost. Adding too few will result in
15693 wasted time in find_partial_die, when we reread the compilation
15694 unit with load_all_dies set. */
15697 || abbrev
->tag
== DW_TAG_constant
15698 || abbrev
->tag
== DW_TAG_subprogram
15699 || abbrev
->tag
== DW_TAG_variable
15700 || abbrev
->tag
== DW_TAG_namespace
15701 || part_die
->is_declaration
)
15705 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15706 part_die
->offset
.sect_off
, INSERT
);
15710 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15711 sizeof (struct partial_die_info
));
15713 /* For some DIEs we want to follow their children (if any). For C
15714 we have no reason to follow the children of structures; for other
15715 languages we have to, so that we can get at method physnames
15716 to infer fully qualified class names, for DW_AT_specification,
15717 and for C++ template arguments. For C++, we also look one level
15718 inside functions to find template arguments (if the name of the
15719 function does not already contain the template arguments).
15721 For Ada, we need to scan the children of subprograms and lexical
15722 blocks as well because Ada allows the definition of nested
15723 entities that could be interesting for the debugger, such as
15724 nested subprograms for instance. */
15725 if (last_die
->has_children
15727 || last_die
->tag
== DW_TAG_namespace
15728 || last_die
->tag
== DW_TAG_module
15729 || last_die
->tag
== DW_TAG_enumeration_type
15730 || (cu
->language
== language_cplus
15731 && last_die
->tag
== DW_TAG_subprogram
15732 && (last_die
->name
== NULL
15733 || strchr (last_die
->name
, '<') == NULL
))
15734 || (cu
->language
!= language_c
15735 && (last_die
->tag
== DW_TAG_class_type
15736 || last_die
->tag
== DW_TAG_interface_type
15737 || last_die
->tag
== DW_TAG_structure_type
15738 || last_die
->tag
== DW_TAG_union_type
))
15739 || (cu
->language
== language_ada
15740 && (last_die
->tag
== DW_TAG_subprogram
15741 || last_die
->tag
== DW_TAG_lexical_block
))))
15744 parent_die
= last_die
;
15748 /* Otherwise we skip to the next sibling, if any. */
15749 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15751 /* Back to the top, do it again. */
15755 /* Read a minimal amount of information into the minimal die structure. */
15757 static const gdb_byte
*
15758 read_partial_die (const struct die_reader_specs
*reader
,
15759 struct partial_die_info
*part_die
,
15760 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15761 const gdb_byte
*info_ptr
)
15763 struct dwarf2_cu
*cu
= reader
->cu
;
15764 struct objfile
*objfile
= cu
->objfile
;
15765 const gdb_byte
*buffer
= reader
->buffer
;
15767 struct attribute attr
;
15768 int has_low_pc_attr
= 0;
15769 int has_high_pc_attr
= 0;
15770 int high_pc_relative
= 0;
15772 memset (part_die
, 0, sizeof (struct partial_die_info
));
15774 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15776 info_ptr
+= abbrev_len
;
15778 if (abbrev
== NULL
)
15781 part_die
->tag
= abbrev
->tag
;
15782 part_die
->has_children
= abbrev
->has_children
;
15784 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15786 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15788 /* Store the data if it is of an attribute we want to keep in a
15789 partial symbol table. */
15793 switch (part_die
->tag
)
15795 case DW_TAG_compile_unit
:
15796 case DW_TAG_partial_unit
:
15797 case DW_TAG_type_unit
:
15798 /* Compilation units have a DW_AT_name that is a filename, not
15799 a source language identifier. */
15800 case DW_TAG_enumeration_type
:
15801 case DW_TAG_enumerator
:
15802 /* These tags always have simple identifiers already; no need
15803 to canonicalize them. */
15804 part_die
->name
= DW_STRING (&attr
);
15808 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15809 &objfile
->per_bfd
->storage_obstack
);
15813 case DW_AT_linkage_name
:
15814 case DW_AT_MIPS_linkage_name
:
15815 /* Note that both forms of linkage name might appear. We
15816 assume they will be the same, and we only store the last
15818 if (cu
->language
== language_ada
)
15819 part_die
->name
= DW_STRING (&attr
);
15820 part_die
->linkage_name
= DW_STRING (&attr
);
15823 has_low_pc_attr
= 1;
15824 part_die
->lowpc
= attr_value_as_address (&attr
);
15826 case DW_AT_high_pc
:
15827 has_high_pc_attr
= 1;
15828 part_die
->highpc
= attr_value_as_address (&attr
);
15829 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15830 high_pc_relative
= 1;
15832 case DW_AT_location
:
15833 /* Support the .debug_loc offsets. */
15834 if (attr_form_is_block (&attr
))
15836 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15838 else if (attr_form_is_section_offset (&attr
))
15840 dwarf2_complex_location_expr_complaint ();
15844 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15845 "partial symbol information");
15848 case DW_AT_external
:
15849 part_die
->is_external
= DW_UNSND (&attr
);
15851 case DW_AT_declaration
:
15852 part_die
->is_declaration
= DW_UNSND (&attr
);
15855 part_die
->has_type
= 1;
15857 case DW_AT_abstract_origin
:
15858 case DW_AT_specification
:
15859 case DW_AT_extension
:
15860 part_die
->has_specification
= 1;
15861 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15862 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15863 || cu
->per_cu
->is_dwz
);
15865 case DW_AT_sibling
:
15866 /* Ignore absolute siblings, they might point outside of
15867 the current compile unit. */
15868 if (attr
.form
== DW_FORM_ref_addr
)
15869 complaint (&symfile_complaints
,
15870 _("ignoring absolute DW_AT_sibling"));
15873 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15874 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15876 if (sibling_ptr
< info_ptr
)
15877 complaint (&symfile_complaints
,
15878 _("DW_AT_sibling points backwards"));
15879 else if (sibling_ptr
> reader
->buffer_end
)
15880 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15882 part_die
->sibling
= sibling_ptr
;
15885 case DW_AT_byte_size
:
15886 part_die
->has_byte_size
= 1;
15888 case DW_AT_const_value
:
15889 part_die
->has_const_value
= 1;
15891 case DW_AT_calling_convention
:
15892 /* DWARF doesn't provide a way to identify a program's source-level
15893 entry point. DW_AT_calling_convention attributes are only meant
15894 to describe functions' calling conventions.
15896 However, because it's a necessary piece of information in
15897 Fortran, and because DW_CC_program is the only piece of debugging
15898 information whose definition refers to a 'main program' at all,
15899 several compilers have begun marking Fortran main programs with
15900 DW_CC_program --- even when those functions use the standard
15901 calling conventions.
15903 So until DWARF specifies a way to provide this information and
15904 compilers pick up the new representation, we'll support this
15906 if (DW_UNSND (&attr
) == DW_CC_program
15907 && cu
->language
== language_fortran
)
15908 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15911 if (DW_UNSND (&attr
) == DW_INL_inlined
15912 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15913 part_die
->may_be_inlined
= 1;
15917 if (part_die
->tag
== DW_TAG_imported_unit
)
15919 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15920 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15921 || cu
->per_cu
->is_dwz
);
15930 if (high_pc_relative
)
15931 part_die
->highpc
+= part_die
->lowpc
;
15933 if (has_low_pc_attr
&& has_high_pc_attr
)
15935 /* When using the GNU linker, .gnu.linkonce. sections are used to
15936 eliminate duplicate copies of functions and vtables and such.
15937 The linker will arbitrarily choose one and discard the others.
15938 The AT_*_pc values for such functions refer to local labels in
15939 these sections. If the section from that file was discarded, the
15940 labels are not in the output, so the relocs get a value of 0.
15941 If this is a discarded function, mark the pc bounds as invalid,
15942 so that GDB will ignore it. */
15943 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15945 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15947 complaint (&symfile_complaints
,
15948 _("DW_AT_low_pc %s is zero "
15949 "for DIE at 0x%x [in module %s]"),
15950 paddress (gdbarch
, part_die
->lowpc
),
15951 part_die
->offset
.sect_off
, objfile_name (objfile
));
15953 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15954 else if (part_die
->lowpc
>= part_die
->highpc
)
15956 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15958 complaint (&symfile_complaints
,
15959 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15960 "for DIE at 0x%x [in module %s]"),
15961 paddress (gdbarch
, part_die
->lowpc
),
15962 paddress (gdbarch
, part_die
->highpc
),
15963 part_die
->offset
.sect_off
, objfile_name (objfile
));
15966 part_die
->has_pc_info
= 1;
15972 /* Find a cached partial DIE at OFFSET in CU. */
15974 static struct partial_die_info
*
15975 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15977 struct partial_die_info
*lookup_die
= NULL
;
15978 struct partial_die_info part_die
;
15980 part_die
.offset
= offset
;
15981 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15987 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15988 except in the case of .debug_types DIEs which do not reference
15989 outside their CU (they do however referencing other types via
15990 DW_FORM_ref_sig8). */
15992 static struct partial_die_info
*
15993 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15995 struct objfile
*objfile
= cu
->objfile
;
15996 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15997 struct partial_die_info
*pd
= NULL
;
15999 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16000 && offset_in_cu_p (&cu
->header
, offset
))
16002 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16005 /* We missed recording what we needed.
16006 Load all dies and try again. */
16007 per_cu
= cu
->per_cu
;
16011 /* TUs don't reference other CUs/TUs (except via type signatures). */
16012 if (cu
->per_cu
->is_debug_types
)
16014 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16015 " external reference to offset 0x%lx [in module %s].\n"),
16016 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16017 bfd_get_filename (objfile
->obfd
));
16019 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16022 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16023 load_partial_comp_unit (per_cu
);
16025 per_cu
->cu
->last_used
= 0;
16026 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16029 /* If we didn't find it, and not all dies have been loaded,
16030 load them all and try again. */
16032 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16034 per_cu
->load_all_dies
= 1;
16036 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16037 THIS_CU->cu may already be in use. So we can't just free it and
16038 replace its DIEs with the ones we read in. Instead, we leave those
16039 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16040 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16042 load_partial_comp_unit (per_cu
);
16044 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16048 internal_error (__FILE__
, __LINE__
,
16049 _("could not find partial DIE 0x%x "
16050 "in cache [from module %s]\n"),
16051 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16055 /* See if we can figure out if the class lives in a namespace. We do
16056 this by looking for a member function; its demangled name will
16057 contain namespace info, if there is any. */
16060 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16061 struct dwarf2_cu
*cu
)
16063 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16064 what template types look like, because the demangler
16065 frequently doesn't give the same name as the debug info. We
16066 could fix this by only using the demangled name to get the
16067 prefix (but see comment in read_structure_type). */
16069 struct partial_die_info
*real_pdi
;
16070 struct partial_die_info
*child_pdi
;
16072 /* If this DIE (this DIE's specification, if any) has a parent, then
16073 we should not do this. We'll prepend the parent's fully qualified
16074 name when we create the partial symbol. */
16076 real_pdi
= struct_pdi
;
16077 while (real_pdi
->has_specification
)
16078 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16079 real_pdi
->spec_is_dwz
, cu
);
16081 if (real_pdi
->die_parent
!= NULL
)
16084 for (child_pdi
= struct_pdi
->die_child
;
16086 child_pdi
= child_pdi
->die_sibling
)
16088 if (child_pdi
->tag
== DW_TAG_subprogram
16089 && child_pdi
->linkage_name
!= NULL
)
16091 char *actual_class_name
16092 = language_class_name_from_physname (cu
->language_defn
,
16093 child_pdi
->linkage_name
);
16094 if (actual_class_name
!= NULL
)
16097 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16099 strlen (actual_class_name
));
16100 xfree (actual_class_name
);
16107 /* Adjust PART_DIE before generating a symbol for it. This function
16108 may set the is_external flag or change the DIE's name. */
16111 fixup_partial_die (struct partial_die_info
*part_die
,
16112 struct dwarf2_cu
*cu
)
16114 /* Once we've fixed up a die, there's no point in doing so again.
16115 This also avoids a memory leak if we were to call
16116 guess_partial_die_structure_name multiple times. */
16117 if (part_die
->fixup_called
)
16120 /* If we found a reference attribute and the DIE has no name, try
16121 to find a name in the referred to DIE. */
16123 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16125 struct partial_die_info
*spec_die
;
16127 spec_die
= find_partial_die (part_die
->spec_offset
,
16128 part_die
->spec_is_dwz
, cu
);
16130 fixup_partial_die (spec_die
, cu
);
16132 if (spec_die
->name
)
16134 part_die
->name
= spec_die
->name
;
16136 /* Copy DW_AT_external attribute if it is set. */
16137 if (spec_die
->is_external
)
16138 part_die
->is_external
= spec_die
->is_external
;
16142 /* Set default names for some unnamed DIEs. */
16144 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16145 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16147 /* If there is no parent die to provide a namespace, and there are
16148 children, see if we can determine the namespace from their linkage
16150 if (cu
->language
== language_cplus
16151 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16152 && part_die
->die_parent
== NULL
16153 && part_die
->has_children
16154 && (part_die
->tag
== DW_TAG_class_type
16155 || part_die
->tag
== DW_TAG_structure_type
16156 || part_die
->tag
== DW_TAG_union_type
))
16157 guess_partial_die_structure_name (part_die
, cu
);
16159 /* GCC might emit a nameless struct or union that has a linkage
16160 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16161 if (part_die
->name
== NULL
16162 && (part_die
->tag
== DW_TAG_class_type
16163 || part_die
->tag
== DW_TAG_interface_type
16164 || part_die
->tag
== DW_TAG_structure_type
16165 || part_die
->tag
== DW_TAG_union_type
)
16166 && part_die
->linkage_name
!= NULL
)
16170 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16175 /* Strip any leading namespaces/classes, keep only the base name.
16176 DW_AT_name for named DIEs does not contain the prefixes. */
16177 base
= strrchr (demangled
, ':');
16178 if (base
&& base
> demangled
&& base
[-1] == ':')
16184 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16185 base
, strlen (base
));
16190 part_die
->fixup_called
= 1;
16193 /* Read an attribute value described by an attribute form. */
16195 static const gdb_byte
*
16196 read_attribute_value (const struct die_reader_specs
*reader
,
16197 struct attribute
*attr
, unsigned form
,
16198 const gdb_byte
*info_ptr
)
16200 struct dwarf2_cu
*cu
= reader
->cu
;
16201 struct objfile
*objfile
= cu
->objfile
;
16202 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16203 bfd
*abfd
= reader
->abfd
;
16204 struct comp_unit_head
*cu_header
= &cu
->header
;
16205 unsigned int bytes_read
;
16206 struct dwarf_block
*blk
;
16211 case DW_FORM_ref_addr
:
16212 if (cu
->header
.version
== 2)
16213 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16215 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16216 &cu
->header
, &bytes_read
);
16217 info_ptr
+= bytes_read
;
16219 case DW_FORM_GNU_ref_alt
:
16220 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16221 info_ptr
+= bytes_read
;
16224 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16225 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16226 info_ptr
+= bytes_read
;
16228 case DW_FORM_block2
:
16229 blk
= dwarf_alloc_block (cu
);
16230 blk
->size
= read_2_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_block4
:
16237 blk
= dwarf_alloc_block (cu
);
16238 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16240 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16241 info_ptr
+= blk
->size
;
16242 DW_BLOCK (attr
) = blk
;
16244 case DW_FORM_data2
:
16245 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16248 case DW_FORM_data4
:
16249 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16252 case DW_FORM_data8
:
16253 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16256 case DW_FORM_sec_offset
:
16257 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16258 info_ptr
+= bytes_read
;
16260 case DW_FORM_string
:
16261 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16262 DW_STRING_IS_CANONICAL (attr
) = 0;
16263 info_ptr
+= bytes_read
;
16266 if (!cu
->per_cu
->is_dwz
)
16268 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16270 DW_STRING_IS_CANONICAL (attr
) = 0;
16271 info_ptr
+= bytes_read
;
16275 case DW_FORM_GNU_strp_alt
:
16277 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16278 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16281 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16282 DW_STRING_IS_CANONICAL (attr
) = 0;
16283 info_ptr
+= bytes_read
;
16286 case DW_FORM_exprloc
:
16287 case DW_FORM_block
:
16288 blk
= dwarf_alloc_block (cu
);
16289 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16290 info_ptr
+= bytes_read
;
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_block1
:
16296 blk
= dwarf_alloc_block (cu
);
16297 blk
->size
= read_1_byte (abfd
, info_ptr
);
16299 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16300 info_ptr
+= blk
->size
;
16301 DW_BLOCK (attr
) = blk
;
16303 case DW_FORM_data1
:
16304 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16308 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16311 case DW_FORM_flag_present
:
16312 DW_UNSND (attr
) = 1;
16314 case DW_FORM_sdata
:
16315 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16316 info_ptr
+= bytes_read
;
16318 case DW_FORM_udata
:
16319 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16320 info_ptr
+= bytes_read
;
16323 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16324 + read_1_byte (abfd
, info_ptr
));
16328 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16329 + read_2_bytes (abfd
, info_ptr
));
16333 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16334 + read_4_bytes (abfd
, info_ptr
));
16338 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16339 + read_8_bytes (abfd
, info_ptr
));
16342 case DW_FORM_ref_sig8
:
16343 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16346 case DW_FORM_ref_udata
:
16347 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16348 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16349 info_ptr
+= bytes_read
;
16351 case DW_FORM_indirect
:
16352 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16353 info_ptr
+= bytes_read
;
16354 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16356 case DW_FORM_GNU_addr_index
:
16357 if (reader
->dwo_file
== NULL
)
16359 /* For now flag a hard error.
16360 Later we can turn this into a complaint. */
16361 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16362 dwarf_form_name (form
),
16363 bfd_get_filename (abfd
));
16365 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16366 info_ptr
+= bytes_read
;
16368 case DW_FORM_GNU_str_index
:
16369 if (reader
->dwo_file
== NULL
)
16371 /* For now flag a hard error.
16372 Later we can turn this into a complaint if warranted. */
16373 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16374 dwarf_form_name (form
),
16375 bfd_get_filename (abfd
));
16378 ULONGEST str_index
=
16379 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16381 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16382 DW_STRING_IS_CANONICAL (attr
) = 0;
16383 info_ptr
+= bytes_read
;
16387 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16388 dwarf_form_name (form
),
16389 bfd_get_filename (abfd
));
16393 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16394 attr
->form
= DW_FORM_GNU_ref_alt
;
16396 /* We have seen instances where the compiler tried to emit a byte
16397 size attribute of -1 which ended up being encoded as an unsigned
16398 0xffffffff. Although 0xffffffff is technically a valid size value,
16399 an object of this size seems pretty unlikely so we can relatively
16400 safely treat these cases as if the size attribute was invalid and
16401 treat them as zero by default. */
16402 if (attr
->name
== DW_AT_byte_size
16403 && form
== DW_FORM_data4
16404 && DW_UNSND (attr
) >= 0xffffffff)
16407 (&symfile_complaints
,
16408 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16409 hex_string (DW_UNSND (attr
)));
16410 DW_UNSND (attr
) = 0;
16416 /* Read an attribute described by an abbreviated attribute. */
16418 static const gdb_byte
*
16419 read_attribute (const struct die_reader_specs
*reader
,
16420 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16421 const gdb_byte
*info_ptr
)
16423 attr
->name
= abbrev
->name
;
16424 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16427 /* Read dwarf information from a buffer. */
16429 static unsigned int
16430 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16432 return bfd_get_8 (abfd
, buf
);
16436 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16438 return bfd_get_signed_8 (abfd
, buf
);
16441 static unsigned int
16442 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16444 return bfd_get_16 (abfd
, buf
);
16448 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16450 return bfd_get_signed_16 (abfd
, buf
);
16453 static unsigned int
16454 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16456 return bfd_get_32 (abfd
, buf
);
16460 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16462 return bfd_get_signed_32 (abfd
, buf
);
16466 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16468 return bfd_get_64 (abfd
, buf
);
16472 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16473 unsigned int *bytes_read
)
16475 struct comp_unit_head
*cu_header
= &cu
->header
;
16476 CORE_ADDR retval
= 0;
16478 if (cu_header
->signed_addr_p
)
16480 switch (cu_header
->addr_size
)
16483 retval
= bfd_get_signed_16 (abfd
, buf
);
16486 retval
= bfd_get_signed_32 (abfd
, buf
);
16489 retval
= bfd_get_signed_64 (abfd
, buf
);
16492 internal_error (__FILE__
, __LINE__
,
16493 _("read_address: bad switch, signed [in module %s]"),
16494 bfd_get_filename (abfd
));
16499 switch (cu_header
->addr_size
)
16502 retval
= bfd_get_16 (abfd
, buf
);
16505 retval
= bfd_get_32 (abfd
, buf
);
16508 retval
= bfd_get_64 (abfd
, buf
);
16511 internal_error (__FILE__
, __LINE__
,
16512 _("read_address: bad switch, "
16513 "unsigned [in module %s]"),
16514 bfd_get_filename (abfd
));
16518 *bytes_read
= cu_header
->addr_size
;
16522 /* Read the initial length from a section. The (draft) DWARF 3
16523 specification allows the initial length to take up either 4 bytes
16524 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16525 bytes describe the length and all offsets will be 8 bytes in length
16528 An older, non-standard 64-bit format is also handled by this
16529 function. The older format in question stores the initial length
16530 as an 8-byte quantity without an escape value. Lengths greater
16531 than 2^32 aren't very common which means that the initial 4 bytes
16532 is almost always zero. Since a length value of zero doesn't make
16533 sense for the 32-bit format, this initial zero can be considered to
16534 be an escape value which indicates the presence of the older 64-bit
16535 format. As written, the code can't detect (old format) lengths
16536 greater than 4GB. If it becomes necessary to handle lengths
16537 somewhat larger than 4GB, we could allow other small values (such
16538 as the non-sensical values of 1, 2, and 3) to also be used as
16539 escape values indicating the presence of the old format.
16541 The value returned via bytes_read should be used to increment the
16542 relevant pointer after calling read_initial_length().
16544 [ Note: read_initial_length() and read_offset() are based on the
16545 document entitled "DWARF Debugging Information Format", revision
16546 3, draft 8, dated November 19, 2001. This document was obtained
16549 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16551 This document is only a draft and is subject to change. (So beware.)
16553 Details regarding the older, non-standard 64-bit format were
16554 determined empirically by examining 64-bit ELF files produced by
16555 the SGI toolchain on an IRIX 6.5 machine.
16557 - Kevin, July 16, 2002
16561 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16563 LONGEST length
= bfd_get_32 (abfd
, buf
);
16565 if (length
== 0xffffffff)
16567 length
= bfd_get_64 (abfd
, buf
+ 4);
16570 else if (length
== 0)
16572 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16573 length
= bfd_get_64 (abfd
, buf
);
16584 /* Cover function for read_initial_length.
16585 Returns the length of the object at BUF, and stores the size of the
16586 initial length in *BYTES_READ and stores the size that offsets will be in
16588 If the initial length size is not equivalent to that specified in
16589 CU_HEADER then issue a complaint.
16590 This is useful when reading non-comp-unit headers. */
16593 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16594 const struct comp_unit_head
*cu_header
,
16595 unsigned int *bytes_read
,
16596 unsigned int *offset_size
)
16598 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16600 gdb_assert (cu_header
->initial_length_size
== 4
16601 || cu_header
->initial_length_size
== 8
16602 || cu_header
->initial_length_size
== 12);
16604 if (cu_header
->initial_length_size
!= *bytes_read
)
16605 complaint (&symfile_complaints
,
16606 _("intermixed 32-bit and 64-bit DWARF sections"));
16608 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16612 /* Read an offset from the data stream. The size of the offset is
16613 given by cu_header->offset_size. */
16616 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16617 const struct comp_unit_head
*cu_header
,
16618 unsigned int *bytes_read
)
16620 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16622 *bytes_read
= cu_header
->offset_size
;
16626 /* Read an offset from the data stream. */
16629 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16631 LONGEST retval
= 0;
16633 switch (offset_size
)
16636 retval
= bfd_get_32 (abfd
, buf
);
16639 retval
= bfd_get_64 (abfd
, buf
);
16642 internal_error (__FILE__
, __LINE__
,
16643 _("read_offset_1: bad switch [in module %s]"),
16644 bfd_get_filename (abfd
));
16650 static const gdb_byte
*
16651 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16653 /* If the size of a host char is 8 bits, we can return a pointer
16654 to the buffer, otherwise we have to copy the data to a buffer
16655 allocated on the temporary obstack. */
16656 gdb_assert (HOST_CHAR_BIT
== 8);
16660 static const char *
16661 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16662 unsigned int *bytes_read_ptr
)
16664 /* If the size of a host char is 8 bits, we can return a pointer
16665 to the string, otherwise we have to copy the string to a buffer
16666 allocated on the temporary obstack. */
16667 gdb_assert (HOST_CHAR_BIT
== 8);
16670 *bytes_read_ptr
= 1;
16673 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16674 return (const char *) buf
;
16677 static const char *
16678 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16680 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16681 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16682 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16683 bfd_get_filename (abfd
));
16684 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16685 error (_("DW_FORM_strp pointing outside of "
16686 ".debug_str section [in module %s]"),
16687 bfd_get_filename (abfd
));
16688 gdb_assert (HOST_CHAR_BIT
== 8);
16689 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16691 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16694 /* Read a string at offset STR_OFFSET in the .debug_str section from
16695 the .dwz file DWZ. Throw an error if the offset is too large. If
16696 the string consists of a single NUL byte, return NULL; otherwise
16697 return a pointer to the string. */
16699 static const char *
16700 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16702 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16704 if (dwz
->str
.buffer
== NULL
)
16705 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16706 "section [in module %s]"),
16707 bfd_get_filename (dwz
->dwz_bfd
));
16708 if (str_offset
>= dwz
->str
.size
)
16709 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16710 ".debug_str section [in module %s]"),
16711 bfd_get_filename (dwz
->dwz_bfd
));
16712 gdb_assert (HOST_CHAR_BIT
== 8);
16713 if (dwz
->str
.buffer
[str_offset
] == '\0')
16715 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16718 static const char *
16719 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16720 const struct comp_unit_head
*cu_header
,
16721 unsigned int *bytes_read_ptr
)
16723 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16725 return read_indirect_string_at_offset (abfd
, str_offset
);
16729 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16730 unsigned int *bytes_read_ptr
)
16733 unsigned int num_read
;
16735 unsigned char byte
;
16743 byte
= bfd_get_8 (abfd
, buf
);
16746 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16747 if ((byte
& 128) == 0)
16753 *bytes_read_ptr
= num_read
;
16758 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16759 unsigned int *bytes_read_ptr
)
16762 int i
, shift
, num_read
;
16763 unsigned char byte
;
16771 byte
= bfd_get_8 (abfd
, buf
);
16774 result
|= ((LONGEST
) (byte
& 127) << shift
);
16776 if ((byte
& 128) == 0)
16781 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16782 result
|= -(((LONGEST
) 1) << shift
);
16783 *bytes_read_ptr
= num_read
;
16787 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16788 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16789 ADDR_SIZE is the size of addresses from the CU header. */
16792 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16794 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16795 bfd
*abfd
= objfile
->obfd
;
16796 const gdb_byte
*info_ptr
;
16798 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16799 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16800 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16801 objfile_name (objfile
));
16802 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16803 error (_("DW_FORM_addr_index pointing outside of "
16804 ".debug_addr section [in module %s]"),
16805 objfile_name (objfile
));
16806 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16807 + addr_base
+ addr_index
* addr_size
);
16808 if (addr_size
== 4)
16809 return bfd_get_32 (abfd
, info_ptr
);
16811 return bfd_get_64 (abfd
, info_ptr
);
16814 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16817 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16819 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16822 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16825 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16826 unsigned int *bytes_read
)
16828 bfd
*abfd
= cu
->objfile
->obfd
;
16829 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16831 return read_addr_index (cu
, addr_index
);
16834 /* Data structure to pass results from dwarf2_read_addr_index_reader
16835 back to dwarf2_read_addr_index. */
16837 struct dwarf2_read_addr_index_data
16839 ULONGEST addr_base
;
16843 /* die_reader_func for dwarf2_read_addr_index. */
16846 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16847 const gdb_byte
*info_ptr
,
16848 struct die_info
*comp_unit_die
,
16852 struct dwarf2_cu
*cu
= reader
->cu
;
16853 struct dwarf2_read_addr_index_data
*aidata
=
16854 (struct dwarf2_read_addr_index_data
*) data
;
16856 aidata
->addr_base
= cu
->addr_base
;
16857 aidata
->addr_size
= cu
->header
.addr_size
;
16860 /* Given an index in .debug_addr, fetch the value.
16861 NOTE: This can be called during dwarf expression evaluation,
16862 long after the debug information has been read, and thus per_cu->cu
16863 may no longer exist. */
16866 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16867 unsigned int addr_index
)
16869 struct objfile
*objfile
= per_cu
->objfile
;
16870 struct dwarf2_cu
*cu
= per_cu
->cu
;
16871 ULONGEST addr_base
;
16874 /* This is intended to be called from outside this file. */
16875 dw2_setup (objfile
);
16877 /* We need addr_base and addr_size.
16878 If we don't have PER_CU->cu, we have to get it.
16879 Nasty, but the alternative is storing the needed info in PER_CU,
16880 which at this point doesn't seem justified: it's not clear how frequently
16881 it would get used and it would increase the size of every PER_CU.
16882 Entry points like dwarf2_per_cu_addr_size do a similar thing
16883 so we're not in uncharted territory here.
16884 Alas we need to be a bit more complicated as addr_base is contained
16887 We don't need to read the entire CU(/TU).
16888 We just need the header and top level die.
16890 IWBN to use the aging mechanism to let us lazily later discard the CU.
16891 For now we skip this optimization. */
16895 addr_base
= cu
->addr_base
;
16896 addr_size
= cu
->header
.addr_size
;
16900 struct dwarf2_read_addr_index_data aidata
;
16902 /* Note: We can't use init_cutu_and_read_dies_simple here,
16903 we need addr_base. */
16904 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16905 dwarf2_read_addr_index_reader
, &aidata
);
16906 addr_base
= aidata
.addr_base
;
16907 addr_size
= aidata
.addr_size
;
16910 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16913 /* Given a DW_FORM_GNU_str_index, fetch the string.
16914 This is only used by the Fission support. */
16916 static const char *
16917 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16919 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16920 const char *objf_name
= objfile_name (objfile
);
16921 bfd
*abfd
= objfile
->obfd
;
16922 struct dwarf2_cu
*cu
= reader
->cu
;
16923 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16924 struct dwarf2_section_info
*str_offsets_section
=
16925 &reader
->dwo_file
->sections
.str_offsets
;
16926 const gdb_byte
*info_ptr
;
16927 ULONGEST str_offset
;
16928 static const char form_name
[] = "DW_FORM_GNU_str_index";
16930 dwarf2_read_section (objfile
, str_section
);
16931 dwarf2_read_section (objfile
, str_offsets_section
);
16932 if (str_section
->buffer
== NULL
)
16933 error (_("%s used without .debug_str.dwo section"
16934 " in CU at offset 0x%lx [in module %s]"),
16935 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16936 if (str_offsets_section
->buffer
== NULL
)
16937 error (_("%s used without .debug_str_offsets.dwo section"
16938 " in CU at offset 0x%lx [in module %s]"),
16939 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16940 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16941 error (_("%s pointing outside of .debug_str_offsets.dwo"
16942 " section in CU at offset 0x%lx [in module %s]"),
16943 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16944 info_ptr
= (str_offsets_section
->buffer
16945 + str_index
* cu
->header
.offset_size
);
16946 if (cu
->header
.offset_size
== 4)
16947 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16949 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16950 if (str_offset
>= str_section
->size
)
16951 error (_("Offset from %s pointing outside of"
16952 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16953 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16954 return (const char *) (str_section
->buffer
+ str_offset
);
16957 /* Return the length of an LEB128 number in BUF. */
16960 leb128_size (const gdb_byte
*buf
)
16962 const gdb_byte
*begin
= buf
;
16968 if ((byte
& 128) == 0)
16969 return buf
- begin
;
16974 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16983 cu
->language
= language_c
;
16985 case DW_LANG_C_plus_plus
:
16986 case DW_LANG_C_plus_plus_11
:
16987 case DW_LANG_C_plus_plus_14
:
16988 cu
->language
= language_cplus
;
16991 cu
->language
= language_d
;
16993 case DW_LANG_Fortran77
:
16994 case DW_LANG_Fortran90
:
16995 case DW_LANG_Fortran95
:
16996 case DW_LANG_Fortran03
:
16997 case DW_LANG_Fortran08
:
16998 cu
->language
= language_fortran
;
17001 cu
->language
= language_go
;
17003 case DW_LANG_Mips_Assembler
:
17004 cu
->language
= language_asm
;
17007 cu
->language
= language_java
;
17009 case DW_LANG_Ada83
:
17010 case DW_LANG_Ada95
:
17011 cu
->language
= language_ada
;
17013 case DW_LANG_Modula2
:
17014 cu
->language
= language_m2
;
17016 case DW_LANG_Pascal83
:
17017 cu
->language
= language_pascal
;
17020 cu
->language
= language_objc
;
17022 case DW_LANG_Cobol74
:
17023 case DW_LANG_Cobol85
:
17025 cu
->language
= language_minimal
;
17028 cu
->language_defn
= language_def (cu
->language
);
17031 /* Return the named attribute or NULL if not there. */
17033 static struct attribute
*
17034 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17039 struct attribute
*spec
= NULL
;
17041 for (i
= 0; i
< die
->num_attrs
; ++i
)
17043 if (die
->attrs
[i
].name
== name
)
17044 return &die
->attrs
[i
];
17045 if (die
->attrs
[i
].name
== DW_AT_specification
17046 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17047 spec
= &die
->attrs
[i
];
17053 die
= follow_die_ref (die
, spec
, &cu
);
17059 /* Return the named attribute or NULL if not there,
17060 but do not follow DW_AT_specification, etc.
17061 This is for use in contexts where we're reading .debug_types dies.
17062 Following DW_AT_specification, DW_AT_abstract_origin will take us
17063 back up the chain, and we want to go down. */
17065 static struct attribute
*
17066 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17070 for (i
= 0; i
< die
->num_attrs
; ++i
)
17071 if (die
->attrs
[i
].name
== name
)
17072 return &die
->attrs
[i
];
17077 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17078 and holds a non-zero value. This function should only be used for
17079 DW_FORM_flag or DW_FORM_flag_present attributes. */
17082 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17084 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17086 return (attr
&& DW_UNSND (attr
));
17090 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17092 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17093 which value is non-zero. However, we have to be careful with
17094 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17095 (via dwarf2_flag_true_p) follows this attribute. So we may
17096 end up accidently finding a declaration attribute that belongs
17097 to a different DIE referenced by the specification attribute,
17098 even though the given DIE does not have a declaration attribute. */
17099 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17100 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17103 /* Return the die giving the specification for DIE, if there is
17104 one. *SPEC_CU is the CU containing DIE on input, and the CU
17105 containing the return value on output. If there is no
17106 specification, but there is an abstract origin, that is
17109 static struct die_info
*
17110 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17112 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17115 if (spec_attr
== NULL
)
17116 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17118 if (spec_attr
== NULL
)
17121 return follow_die_ref (die
, spec_attr
, spec_cu
);
17124 /* Free the line_header structure *LH, and any arrays and strings it
17126 NOTE: This is also used as a "cleanup" function. */
17129 free_line_header (struct line_header
*lh
)
17131 if (lh
->standard_opcode_lengths
)
17132 xfree (lh
->standard_opcode_lengths
);
17134 /* Remember that all the lh->file_names[i].name pointers are
17135 pointers into debug_line_buffer, and don't need to be freed. */
17136 if (lh
->file_names
)
17137 xfree (lh
->file_names
);
17139 /* Similarly for the include directory names. */
17140 if (lh
->include_dirs
)
17141 xfree (lh
->include_dirs
);
17146 /* Stub for free_line_header to match void * callback types. */
17149 free_line_header_voidp (void *arg
)
17151 struct line_header
*lh
= arg
;
17153 free_line_header (lh
);
17156 /* Add an entry to LH's include directory table. */
17159 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17161 if (dwarf_line_debug
>= 2)
17162 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17163 lh
->num_include_dirs
+ 1, include_dir
);
17165 /* Grow the array if necessary. */
17166 if (lh
->include_dirs_size
== 0)
17168 lh
->include_dirs_size
= 1; /* for testing */
17169 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17170 * sizeof (*lh
->include_dirs
));
17172 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17174 lh
->include_dirs_size
*= 2;
17175 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17176 (lh
->include_dirs_size
17177 * sizeof (*lh
->include_dirs
)));
17180 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17183 /* Add an entry to LH's file name table. */
17186 add_file_name (struct line_header
*lh
,
17188 unsigned int dir_index
,
17189 unsigned int mod_time
,
17190 unsigned int length
)
17192 struct file_entry
*fe
;
17194 if (dwarf_line_debug
>= 2)
17195 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17196 lh
->num_file_names
+ 1, name
);
17198 /* Grow the array if necessary. */
17199 if (lh
->file_names_size
== 0)
17201 lh
->file_names_size
= 1; /* for testing */
17202 lh
->file_names
= xmalloc (lh
->file_names_size
17203 * sizeof (*lh
->file_names
));
17205 else if (lh
->num_file_names
>= lh
->file_names_size
)
17207 lh
->file_names_size
*= 2;
17208 lh
->file_names
= xrealloc (lh
->file_names
,
17209 (lh
->file_names_size
17210 * sizeof (*lh
->file_names
)));
17213 fe
= &lh
->file_names
[lh
->num_file_names
++];
17215 fe
->dir_index
= dir_index
;
17216 fe
->mod_time
= mod_time
;
17217 fe
->length
= length
;
17218 fe
->included_p
= 0;
17222 /* A convenience function to find the proper .debug_line section for a CU. */
17224 static struct dwarf2_section_info
*
17225 get_debug_line_section (struct dwarf2_cu
*cu
)
17227 struct dwarf2_section_info
*section
;
17229 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17231 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17232 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17233 else if (cu
->per_cu
->is_dwz
)
17235 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17237 section
= &dwz
->line
;
17240 section
= &dwarf2_per_objfile
->line
;
17245 /* Read the statement program header starting at OFFSET in
17246 .debug_line, or .debug_line.dwo. Return a pointer
17247 to a struct line_header, allocated using xmalloc.
17248 Returns NULL if there is a problem reading the header, e.g., if it
17249 has a version we don't understand.
17251 NOTE: the strings in the include directory and file name tables of
17252 the returned object point into the dwarf line section buffer,
17253 and must not be freed. */
17255 static struct line_header
*
17256 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17258 struct cleanup
*back_to
;
17259 struct line_header
*lh
;
17260 const gdb_byte
*line_ptr
;
17261 unsigned int bytes_read
, offset_size
;
17263 const char *cur_dir
, *cur_file
;
17264 struct dwarf2_section_info
*section
;
17267 section
= get_debug_line_section (cu
);
17268 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17269 if (section
->buffer
== NULL
)
17271 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17272 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17274 complaint (&symfile_complaints
, _("missing .debug_line section"));
17278 /* We can't do this until we know the section is non-empty.
17279 Only then do we know we have such a section. */
17280 abfd
= get_section_bfd_owner (section
);
17282 /* Make sure that at least there's room for the total_length field.
17283 That could be 12 bytes long, but we're just going to fudge that. */
17284 if (offset
+ 4 >= section
->size
)
17286 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17290 lh
= xmalloc (sizeof (*lh
));
17291 memset (lh
, 0, sizeof (*lh
));
17292 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17295 lh
->offset
.sect_off
= offset
;
17296 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17298 line_ptr
= section
->buffer
+ offset
;
17300 /* Read in the header. */
17302 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17303 &bytes_read
, &offset_size
);
17304 line_ptr
+= bytes_read
;
17305 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17307 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17308 do_cleanups (back_to
);
17311 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17312 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17314 if (lh
->version
> 4)
17316 /* This is a version we don't understand. The format could have
17317 changed in ways we don't handle properly so just punt. */
17318 complaint (&symfile_complaints
,
17319 _("unsupported version in .debug_line section"));
17322 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17323 line_ptr
+= offset_size
;
17324 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17326 if (lh
->version
>= 4)
17328 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17332 lh
->maximum_ops_per_instruction
= 1;
17334 if (lh
->maximum_ops_per_instruction
== 0)
17336 lh
->maximum_ops_per_instruction
= 1;
17337 complaint (&symfile_complaints
,
17338 _("invalid maximum_ops_per_instruction "
17339 "in `.debug_line' section"));
17342 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17344 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17346 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17348 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17350 lh
->standard_opcode_lengths
17351 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17353 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17354 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17356 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17360 /* Read directory table. */
17361 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17363 line_ptr
+= bytes_read
;
17364 add_include_dir (lh
, cur_dir
);
17366 line_ptr
+= bytes_read
;
17368 /* Read file name table. */
17369 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17371 unsigned int dir_index
, mod_time
, length
;
17373 line_ptr
+= bytes_read
;
17374 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17375 line_ptr
+= bytes_read
;
17376 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17377 line_ptr
+= bytes_read
;
17378 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17379 line_ptr
+= bytes_read
;
17381 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17383 line_ptr
+= bytes_read
;
17384 lh
->statement_program_start
= line_ptr
;
17386 if (line_ptr
> (section
->buffer
+ section
->size
))
17387 complaint (&symfile_complaints
,
17388 _("line number info header doesn't "
17389 "fit in `.debug_line' section"));
17391 discard_cleanups (back_to
);
17395 /* Subroutine of dwarf_decode_lines to simplify it.
17396 Return the file name of the psymtab for included file FILE_INDEX
17397 in line header LH of PST.
17398 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17399 If space for the result is malloc'd, it will be freed by a cleanup.
17400 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17402 The function creates dangling cleanup registration. */
17404 static const char *
17405 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17406 const struct partial_symtab
*pst
,
17407 const char *comp_dir
)
17409 const struct file_entry fe
= lh
->file_names
[file_index
];
17410 const char *include_name
= fe
.name
;
17411 const char *include_name_to_compare
= include_name
;
17412 const char *dir_name
= NULL
;
17413 const char *pst_filename
;
17414 char *copied_name
= NULL
;
17417 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17418 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17420 if (!IS_ABSOLUTE_PATH (include_name
)
17421 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17423 /* Avoid creating a duplicate psymtab for PST.
17424 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17425 Before we do the comparison, however, we need to account
17426 for DIR_NAME and COMP_DIR.
17427 First prepend dir_name (if non-NULL). If we still don't
17428 have an absolute path prepend comp_dir (if non-NULL).
17429 However, the directory we record in the include-file's
17430 psymtab does not contain COMP_DIR (to match the
17431 corresponding symtab(s)).
17436 bash$ gcc -g ./hello.c
17437 include_name = "hello.c"
17439 DW_AT_comp_dir = comp_dir = "/tmp"
17440 DW_AT_name = "./hello.c"
17444 if (dir_name
!= NULL
)
17446 char *tem
= concat (dir_name
, SLASH_STRING
,
17447 include_name
, (char *)NULL
);
17449 make_cleanup (xfree
, tem
);
17450 include_name
= tem
;
17451 include_name_to_compare
= include_name
;
17453 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17455 char *tem
= concat (comp_dir
, SLASH_STRING
,
17456 include_name
, (char *)NULL
);
17458 make_cleanup (xfree
, tem
);
17459 include_name_to_compare
= tem
;
17463 pst_filename
= pst
->filename
;
17464 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17466 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17467 pst_filename
, (char *)NULL
);
17468 pst_filename
= copied_name
;
17471 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17473 if (copied_name
!= NULL
)
17474 xfree (copied_name
);
17478 return include_name
;
17481 /* State machine to track the state of the line number program. */
17485 /* These are part of the standard DWARF line number state machine. */
17487 unsigned char op_index
;
17492 unsigned int discriminator
;
17494 /* Additional bits of state we need to track. */
17496 /* The last file that we called dwarf2_start_subfile for.
17497 This is only used for TLLs. */
17498 unsigned int last_file
;
17499 /* The last file a line number was recorded for. */
17500 struct subfile
*last_subfile
;
17502 /* The function to call to record a line. */
17503 record_line_ftype
*record_line
;
17505 /* The last line number that was recorded, used to coalesce
17506 consecutive entries for the same line. This can happen, for
17507 example, when discriminators are present. PR 17276. */
17508 unsigned int last_line
;
17509 int line_has_non_zero_discriminator
;
17510 } lnp_state_machine
;
17512 /* There's a lot of static state to pass to dwarf_record_line.
17513 This keeps it all together. */
17518 struct gdbarch
*gdbarch
;
17520 /* The line number header. */
17521 struct line_header
*line_header
;
17523 /* Non-zero if we're recording lines.
17524 Otherwise we're building partial symtabs and are just interested in
17525 finding include files mentioned by the line number program. */
17526 int record_lines_p
;
17527 } lnp_reader_state
;
17529 /* Ignore this record_line request. */
17532 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17537 /* Return non-zero if we should add LINE to the line number table.
17538 LINE is the line to add, LAST_LINE is the last line that was added,
17539 LAST_SUBFILE is the subfile for LAST_LINE.
17540 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17541 had a non-zero discriminator.
17543 We have to be careful in the presence of discriminators.
17544 E.g., for this line:
17546 for (i = 0; i < 100000; i++);
17548 clang can emit four line number entries for that one line,
17549 each with a different discriminator.
17550 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17552 However, we want gdb to coalesce all four entries into one.
17553 Otherwise the user could stepi into the middle of the line and
17554 gdb would get confused about whether the pc really was in the
17555 middle of the line.
17557 Things are further complicated by the fact that two consecutive
17558 line number entries for the same line is a heuristic used by gcc
17559 to denote the end of the prologue. So we can't just discard duplicate
17560 entries, we have to be selective about it. The heuristic we use is
17561 that we only collapse consecutive entries for the same line if at least
17562 one of those entries has a non-zero discriminator. PR 17276.
17564 Note: Addresses in the line number state machine can never go backwards
17565 within one sequence, thus this coalescing is ok. */
17568 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17569 int line_has_non_zero_discriminator
,
17570 struct subfile
*last_subfile
)
17572 if (current_subfile
!= last_subfile
)
17574 if (line
!= last_line
)
17576 /* Same line for the same file that we've seen already.
17577 As a last check, for pr 17276, only record the line if the line
17578 has never had a non-zero discriminator. */
17579 if (!line_has_non_zero_discriminator
)
17584 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17585 in the line table of subfile SUBFILE. */
17588 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17589 unsigned int line
, CORE_ADDR address
,
17590 record_line_ftype p_record_line
)
17592 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17594 if (dwarf_line_debug
)
17596 fprintf_unfiltered (gdb_stdlog
,
17597 "Recording line %u, file %s, address %s\n",
17598 line
, lbasename (subfile
->name
),
17599 paddress (gdbarch
, address
));
17602 (*p_record_line
) (subfile
, line
, addr
);
17605 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17606 Mark the end of a set of line number records.
17607 The arguments are the same as for dwarf_record_line_1.
17608 If SUBFILE is NULL the request is ignored. */
17611 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17612 CORE_ADDR address
, record_line_ftype p_record_line
)
17614 if (subfile
== NULL
)
17617 if (dwarf_line_debug
)
17619 fprintf_unfiltered (gdb_stdlog
,
17620 "Finishing current line, file %s, address %s\n",
17621 lbasename (subfile
->name
),
17622 paddress (gdbarch
, address
));
17625 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17628 /* Record the line in STATE.
17629 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17632 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17635 const struct line_header
*lh
= reader
->line_header
;
17636 unsigned int file
, line
, discriminator
;
17639 file
= state
->file
;
17640 line
= state
->line
;
17641 is_stmt
= state
->is_stmt
;
17642 discriminator
= state
->discriminator
;
17644 if (dwarf_line_debug
)
17646 fprintf_unfiltered (gdb_stdlog
,
17647 "Processing actual line %u: file %u,"
17648 " address %s, is_stmt %u, discrim %u\n",
17650 paddress (reader
->gdbarch
, state
->address
),
17651 is_stmt
, discriminator
);
17654 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17655 dwarf2_debug_line_missing_file_complaint ();
17656 /* For now we ignore lines not starting on an instruction boundary.
17657 But not when processing end_sequence for compatibility with the
17658 previous version of the code. */
17659 else if (state
->op_index
== 0 || end_sequence
)
17661 lh
->file_names
[file
- 1].included_p
= 1;
17662 if (reader
->record_lines_p
&& is_stmt
)
17664 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17666 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17667 state
->address
, state
->record_line
);
17672 if (dwarf_record_line_p (line
, state
->last_line
,
17673 state
->line_has_non_zero_discriminator
,
17674 state
->last_subfile
))
17676 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17677 line
, state
->address
,
17678 state
->record_line
);
17680 state
->last_subfile
= current_subfile
;
17681 state
->last_line
= line
;
17687 /* Initialize STATE for the start of a line number program. */
17690 init_lnp_state_machine (lnp_state_machine
*state
,
17691 const lnp_reader_state
*reader
)
17693 memset (state
, 0, sizeof (*state
));
17695 /* Just starting, there is no "last file". */
17696 state
->last_file
= 0;
17697 state
->last_subfile
= NULL
;
17699 state
->record_line
= record_line
;
17701 state
->last_line
= 0;
17702 state
->line_has_non_zero_discriminator
= 0;
17704 /* Initialize these according to the DWARF spec. */
17705 state
->op_index
= 0;
17708 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17709 was a line entry for it so that the backend has a chance to adjust it
17710 and also record it in case it needs it. This is currently used by MIPS
17711 code, cf. `mips_adjust_dwarf2_line'. */
17712 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17713 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17714 state
->discriminator
= 0;
17717 /* Check address and if invalid nop-out the rest of the lines in this
17721 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17722 const gdb_byte
*line_ptr
,
17723 CORE_ADDR lowpc
, CORE_ADDR address
)
17725 /* If address < lowpc then it's not a usable value, it's outside the
17726 pc range of the CU. However, we restrict the test to only address
17727 values of zero to preserve GDB's previous behaviour which is to
17728 handle the specific case of a function being GC'd by the linker. */
17730 if (address
== 0 && address
< lowpc
)
17732 /* This line table is for a function which has been
17733 GCd by the linker. Ignore it. PR gdb/12528 */
17735 struct objfile
*objfile
= cu
->objfile
;
17736 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17738 complaint (&symfile_complaints
,
17739 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17740 line_offset
, objfile_name (objfile
));
17741 state
->record_line
= noop_record_line
;
17742 /* Note: sm.record_line is left as noop_record_line
17743 until we see DW_LNE_end_sequence. */
17747 /* Subroutine of dwarf_decode_lines to simplify it.
17748 Process the line number information in LH.
17749 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17750 program in order to set included_p for every referenced header. */
17753 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17754 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17756 const gdb_byte
*line_ptr
, *extended_end
;
17757 const gdb_byte
*line_end
;
17758 unsigned int bytes_read
, extended_len
;
17759 unsigned char op_code
, extended_op
;
17760 CORE_ADDR baseaddr
;
17761 struct objfile
*objfile
= cu
->objfile
;
17762 bfd
*abfd
= objfile
->obfd
;
17763 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17764 /* Non-zero if we're recording line info (as opposed to building partial
17766 int record_lines_p
= !decode_for_pst_p
;
17767 /* A collection of things we need to pass to dwarf_record_line. */
17768 lnp_reader_state reader_state
;
17770 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17772 line_ptr
= lh
->statement_program_start
;
17773 line_end
= lh
->statement_program_end
;
17775 reader_state
.gdbarch
= gdbarch
;
17776 reader_state
.line_header
= lh
;
17777 reader_state
.record_lines_p
= record_lines_p
;
17779 /* Read the statement sequences until there's nothing left. */
17780 while (line_ptr
< line_end
)
17782 /* The DWARF line number program state machine. */
17783 lnp_state_machine state_machine
;
17784 int end_sequence
= 0;
17786 /* Reset the state machine at the start of each sequence. */
17787 init_lnp_state_machine (&state_machine
, &reader_state
);
17789 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17791 /* Start a subfile for the current file of the state machine. */
17792 /* lh->include_dirs and lh->file_names are 0-based, but the
17793 directory and file name numbers in the statement program
17795 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17796 const char *dir
= NULL
;
17798 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17799 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17801 dwarf2_start_subfile (fe
->name
, dir
);
17804 /* Decode the table. */
17805 while (line_ptr
< line_end
&& !end_sequence
)
17807 op_code
= read_1_byte (abfd
, line_ptr
);
17810 if (op_code
>= lh
->opcode_base
)
17812 /* Special opcode. */
17813 unsigned char adj_opcode
;
17814 CORE_ADDR addr_adj
;
17817 adj_opcode
= op_code
- lh
->opcode_base
;
17818 addr_adj
= (((state_machine
.op_index
17819 + (adj_opcode
/ lh
->line_range
))
17820 / lh
->maximum_ops_per_instruction
)
17821 * lh
->minimum_instruction_length
);
17822 state_machine
.address
17823 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17824 state_machine
.op_index
= ((state_machine
.op_index
17825 + (adj_opcode
/ lh
->line_range
))
17826 % lh
->maximum_ops_per_instruction
);
17827 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17828 state_machine
.line
+= line_delta
;
17829 if (line_delta
!= 0)
17830 state_machine
.line_has_non_zero_discriminator
17831 = state_machine
.discriminator
!= 0;
17833 dwarf_record_line (&reader_state
, &state_machine
, 0);
17834 state_machine
.discriminator
= 0;
17836 else switch (op_code
)
17838 case DW_LNS_extended_op
:
17839 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17841 line_ptr
+= bytes_read
;
17842 extended_end
= line_ptr
+ extended_len
;
17843 extended_op
= read_1_byte (abfd
, line_ptr
);
17845 switch (extended_op
)
17847 case DW_LNE_end_sequence
:
17848 state_machine
.record_line
= record_line
;
17851 case DW_LNE_set_address
:
17854 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17856 line_ptr
+= bytes_read
;
17857 check_line_address (cu
, &state_machine
, line_ptr
,
17859 state_machine
.op_index
= 0;
17860 address
+= baseaddr
;
17861 state_machine
.address
17862 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17865 case DW_LNE_define_file
:
17867 const char *cur_file
;
17868 unsigned int dir_index
, mod_time
, length
;
17870 cur_file
= read_direct_string (abfd
, line_ptr
,
17872 line_ptr
+= bytes_read
;
17874 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17875 line_ptr
+= bytes_read
;
17877 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17878 line_ptr
+= bytes_read
;
17880 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17881 line_ptr
+= bytes_read
;
17882 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17885 case DW_LNE_set_discriminator
:
17886 /* The discriminator is not interesting to the debugger;
17887 just ignore it. We still need to check its value though:
17888 if there are consecutive entries for the same
17889 (non-prologue) line we want to coalesce them.
17891 state_machine
.discriminator
17892 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17893 state_machine
.line_has_non_zero_discriminator
17894 |= state_machine
.discriminator
!= 0;
17895 line_ptr
+= bytes_read
;
17898 complaint (&symfile_complaints
,
17899 _("mangled .debug_line section"));
17902 /* Make sure that we parsed the extended op correctly. If e.g.
17903 we expected a different address size than the producer used,
17904 we may have read the wrong number of bytes. */
17905 if (line_ptr
!= extended_end
)
17907 complaint (&symfile_complaints
,
17908 _("mangled .debug_line section"));
17913 dwarf_record_line (&reader_state
, &state_machine
, 0);
17914 state_machine
.discriminator
= 0;
17916 case DW_LNS_advance_pc
:
17919 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17920 CORE_ADDR addr_adj
;
17922 addr_adj
= (((state_machine
.op_index
+ adjust
)
17923 / lh
->maximum_ops_per_instruction
)
17924 * lh
->minimum_instruction_length
);
17925 state_machine
.address
17926 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17927 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17928 % lh
->maximum_ops_per_instruction
);
17929 line_ptr
+= bytes_read
;
17932 case DW_LNS_advance_line
:
17935 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17937 state_machine
.line
+= line_delta
;
17938 if (line_delta
!= 0)
17939 state_machine
.line_has_non_zero_discriminator
17940 = state_machine
.discriminator
!= 0;
17941 line_ptr
+= bytes_read
;
17944 case DW_LNS_set_file
:
17946 /* The arrays lh->include_dirs and lh->file_names are
17947 0-based, but the directory and file name numbers in
17948 the statement program are 1-based. */
17949 struct file_entry
*fe
;
17950 const char *dir
= NULL
;
17952 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
17954 line_ptr
+= bytes_read
;
17955 if (state_machine
.file
== 0
17956 || state_machine
.file
- 1 >= lh
->num_file_names
)
17957 dwarf2_debug_line_missing_file_complaint ();
17960 fe
= &lh
->file_names
[state_machine
.file
- 1];
17961 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17962 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17963 if (record_lines_p
)
17965 state_machine
.last_subfile
= current_subfile
;
17966 state_machine
.line_has_non_zero_discriminator
17967 = state_machine
.discriminator
!= 0;
17968 dwarf2_start_subfile (fe
->name
, dir
);
17973 case DW_LNS_set_column
:
17974 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17975 line_ptr
+= bytes_read
;
17977 case DW_LNS_negate_stmt
:
17978 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
17980 case DW_LNS_set_basic_block
:
17982 /* Add to the address register of the state machine the
17983 address increment value corresponding to special opcode
17984 255. I.e., this value is scaled by the minimum
17985 instruction length since special opcode 255 would have
17986 scaled the increment. */
17987 case DW_LNS_const_add_pc
:
17989 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17990 CORE_ADDR addr_adj
;
17992 addr_adj
= (((state_machine
.op_index
+ adjust
)
17993 / lh
->maximum_ops_per_instruction
)
17994 * lh
->minimum_instruction_length
);
17995 state_machine
.address
17996 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17997 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17998 % lh
->maximum_ops_per_instruction
);
18001 case DW_LNS_fixed_advance_pc
:
18003 CORE_ADDR addr_adj
;
18005 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18006 state_machine
.address
18007 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18008 state_machine
.op_index
= 0;
18014 /* Unknown standard opcode, ignore it. */
18017 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18019 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18020 line_ptr
+= bytes_read
;
18027 dwarf2_debug_line_missing_end_sequence_complaint ();
18029 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18030 in which case we still finish recording the last line). */
18031 dwarf_record_line (&reader_state
, &state_machine
, 1);
18035 /* Decode the Line Number Program (LNP) for the given line_header
18036 structure and CU. The actual information extracted and the type
18037 of structures created from the LNP depends on the value of PST.
18039 1. If PST is NULL, then this procedure uses the data from the program
18040 to create all necessary symbol tables, and their linetables.
18042 2. If PST is not NULL, this procedure reads the program to determine
18043 the list of files included by the unit represented by PST, and
18044 builds all the associated partial symbol tables.
18046 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18047 It is used for relative paths in the line table.
18048 NOTE: When processing partial symtabs (pst != NULL),
18049 comp_dir == pst->dirname.
18051 NOTE: It is important that psymtabs have the same file name (via strcmp)
18052 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18053 symtab we don't use it in the name of the psymtabs we create.
18054 E.g. expand_line_sal requires this when finding psymtabs to expand.
18055 A good testcase for this is mb-inline.exp.
18057 LOWPC is the lowest address in CU (or 0 if not known).
18059 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18060 for its PC<->lines mapping information. Otherwise only the filename
18061 table is read in. */
18064 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18065 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18066 CORE_ADDR lowpc
, int decode_mapping
)
18068 struct objfile
*objfile
= cu
->objfile
;
18069 const int decode_for_pst_p
= (pst
!= NULL
);
18071 if (decode_mapping
)
18072 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18074 if (decode_for_pst_p
)
18078 /* Now that we're done scanning the Line Header Program, we can
18079 create the psymtab of each included file. */
18080 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18081 if (lh
->file_names
[file_index
].included_p
== 1)
18083 const char *include_name
=
18084 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18085 if (include_name
!= NULL
)
18086 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18091 /* Make sure a symtab is created for every file, even files
18092 which contain only variables (i.e. no code with associated
18094 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18097 for (i
= 0; i
< lh
->num_file_names
; i
++)
18099 const char *dir
= NULL
;
18100 struct file_entry
*fe
;
18102 fe
= &lh
->file_names
[i
];
18103 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18104 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18105 dwarf2_start_subfile (fe
->name
, dir
);
18107 if (current_subfile
->symtab
== NULL
)
18109 current_subfile
->symtab
18110 = allocate_symtab (cust
, current_subfile
->name
);
18112 fe
->symtab
= current_subfile
->symtab
;
18117 /* Start a subfile for DWARF. FILENAME is the name of the file and
18118 DIRNAME the name of the source directory which contains FILENAME
18119 or NULL if not known.
18120 This routine tries to keep line numbers from identical absolute and
18121 relative file names in a common subfile.
18123 Using the `list' example from the GDB testsuite, which resides in
18124 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18125 of /srcdir/list0.c yields the following debugging information for list0.c:
18127 DW_AT_name: /srcdir/list0.c
18128 DW_AT_comp_dir: /compdir
18129 files.files[0].name: list0.h
18130 files.files[0].dir: /srcdir
18131 files.files[1].name: list0.c
18132 files.files[1].dir: /srcdir
18134 The line number information for list0.c has to end up in a single
18135 subfile, so that `break /srcdir/list0.c:1' works as expected.
18136 start_subfile will ensure that this happens provided that we pass the
18137 concatenation of files.files[1].dir and files.files[1].name as the
18141 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18145 /* In order not to lose the line information directory,
18146 we concatenate it to the filename when it makes sense.
18147 Note that the Dwarf3 standard says (speaking of filenames in line
18148 information): ``The directory index is ignored for file names
18149 that represent full path names''. Thus ignoring dirname in the
18150 `else' branch below isn't an issue. */
18152 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18154 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18158 start_subfile (filename
);
18164 /* Start a symtab for DWARF.
18165 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18167 static struct compunit_symtab
*
18168 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18169 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18171 struct compunit_symtab
*cust
18172 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18174 record_debugformat ("DWARF 2");
18175 record_producer (cu
->producer
);
18177 /* We assume that we're processing GCC output. */
18178 processing_gcc_compilation
= 2;
18180 cu
->processing_has_namespace_info
= 0;
18186 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18187 struct dwarf2_cu
*cu
)
18189 struct objfile
*objfile
= cu
->objfile
;
18190 struct comp_unit_head
*cu_header
= &cu
->header
;
18192 /* NOTE drow/2003-01-30: There used to be a comment and some special
18193 code here to turn a symbol with DW_AT_external and a
18194 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18195 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18196 with some versions of binutils) where shared libraries could have
18197 relocations against symbols in their debug information - the
18198 minimal symbol would have the right address, but the debug info
18199 would not. It's no longer necessary, because we will explicitly
18200 apply relocations when we read in the debug information now. */
18202 /* A DW_AT_location attribute with no contents indicates that a
18203 variable has been optimized away. */
18204 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18206 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18210 /* Handle one degenerate form of location expression specially, to
18211 preserve GDB's previous behavior when section offsets are
18212 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18213 then mark this symbol as LOC_STATIC. */
18215 if (attr_form_is_block (attr
)
18216 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18217 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18218 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18219 && (DW_BLOCK (attr
)->size
18220 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18222 unsigned int dummy
;
18224 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18225 SYMBOL_VALUE_ADDRESS (sym
) =
18226 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18228 SYMBOL_VALUE_ADDRESS (sym
) =
18229 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18230 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18231 fixup_symbol_section (sym
, objfile
);
18232 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18233 SYMBOL_SECTION (sym
));
18237 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18238 expression evaluator, and use LOC_COMPUTED only when necessary
18239 (i.e. when the value of a register or memory location is
18240 referenced, or a thread-local block, etc.). Then again, it might
18241 not be worthwhile. I'm assuming that it isn't unless performance
18242 or memory numbers show me otherwise. */
18244 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18246 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18247 cu
->has_loclist
= 1;
18250 /* Given a pointer to a DWARF information entry, figure out if we need
18251 to make a symbol table entry for it, and if so, create a new entry
18252 and return a pointer to it.
18253 If TYPE is NULL, determine symbol type from the die, otherwise
18254 used the passed type.
18255 If SPACE is not NULL, use it to hold the new symbol. If it is
18256 NULL, allocate a new symbol on the objfile's obstack. */
18258 static struct symbol
*
18259 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18260 struct symbol
*space
)
18262 struct objfile
*objfile
= cu
->objfile
;
18263 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18264 struct symbol
*sym
= NULL
;
18266 struct attribute
*attr
= NULL
;
18267 struct attribute
*attr2
= NULL
;
18268 CORE_ADDR baseaddr
;
18269 struct pending
**list_to_add
= NULL
;
18271 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18273 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18275 name
= dwarf2_name (die
, cu
);
18278 const char *linkagename
;
18279 int suppress_add
= 0;
18284 sym
= allocate_symbol (objfile
);
18285 OBJSTAT (objfile
, n_syms
++);
18287 /* Cache this symbol's name and the name's demangled form (if any). */
18288 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18289 linkagename
= dwarf2_physname (name
, die
, cu
);
18290 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18292 /* Fortran does not have mangling standard and the mangling does differ
18293 between gfortran, iFort etc. */
18294 if (cu
->language
== language_fortran
18295 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18296 symbol_set_demangled_name (&(sym
->ginfo
),
18297 dwarf2_full_name (name
, die
, cu
),
18300 /* Default assumptions.
18301 Use the passed type or decode it from the die. */
18302 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18303 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18305 SYMBOL_TYPE (sym
) = type
;
18307 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18308 attr
= dwarf2_attr (die
,
18309 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18313 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18316 attr
= dwarf2_attr (die
,
18317 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18321 int file_index
= DW_UNSND (attr
);
18323 if (cu
->line_header
== NULL
18324 || file_index
> cu
->line_header
->num_file_names
)
18325 complaint (&symfile_complaints
,
18326 _("file index out of range"));
18327 else if (file_index
> 0)
18329 struct file_entry
*fe
;
18331 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18332 symbol_set_symtab (sym
, fe
->symtab
);
18339 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18344 addr
= attr_value_as_address (attr
);
18345 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18346 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18348 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18349 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18350 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18351 add_symbol_to_list (sym
, cu
->list_in_scope
);
18353 case DW_TAG_subprogram
:
18354 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18356 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18357 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18358 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18359 || cu
->language
== language_ada
)
18361 /* Subprograms marked external are stored as a global symbol.
18362 Ada subprograms, whether marked external or not, are always
18363 stored as a global symbol, because we want to be able to
18364 access them globally. For instance, we want to be able
18365 to break on a nested subprogram without having to
18366 specify the context. */
18367 list_to_add
= &global_symbols
;
18371 list_to_add
= cu
->list_in_scope
;
18374 case DW_TAG_inlined_subroutine
:
18375 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18377 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18378 SYMBOL_INLINED (sym
) = 1;
18379 list_to_add
= cu
->list_in_scope
;
18381 case DW_TAG_template_value_param
:
18383 /* Fall through. */
18384 case DW_TAG_constant
:
18385 case DW_TAG_variable
:
18386 case DW_TAG_member
:
18387 /* Compilation with minimal debug info may result in
18388 variables with missing type entries. Change the
18389 misleading `void' type to something sensible. */
18390 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18392 = objfile_type (objfile
)->nodebug_data_symbol
;
18394 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18395 /* In the case of DW_TAG_member, we should only be called for
18396 static const members. */
18397 if (die
->tag
== DW_TAG_member
)
18399 /* dwarf2_add_field uses die_is_declaration,
18400 so we do the same. */
18401 gdb_assert (die_is_declaration (die
, cu
));
18406 dwarf2_const_value (attr
, sym
, cu
);
18407 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18410 if (attr2
&& (DW_UNSND (attr2
) != 0))
18411 list_to_add
= &global_symbols
;
18413 list_to_add
= cu
->list_in_scope
;
18417 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18420 var_decode_location (attr
, sym
, cu
);
18421 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18423 /* Fortran explicitly imports any global symbols to the local
18424 scope by DW_TAG_common_block. */
18425 if (cu
->language
== language_fortran
&& die
->parent
18426 && die
->parent
->tag
== DW_TAG_common_block
)
18429 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18430 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18431 && !dwarf2_per_objfile
->has_section_at_zero
)
18433 /* When a static variable is eliminated by the linker,
18434 the corresponding debug information is not stripped
18435 out, but the variable address is set to null;
18436 do not add such variables into symbol table. */
18438 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18440 /* Workaround gfortran PR debug/40040 - it uses
18441 DW_AT_location for variables in -fPIC libraries which may
18442 get overriden by other libraries/executable and get
18443 a different address. Resolve it by the minimal symbol
18444 which may come from inferior's executable using copy
18445 relocation. Make this workaround only for gfortran as for
18446 other compilers GDB cannot guess the minimal symbol
18447 Fortran mangling kind. */
18448 if (cu
->language
== language_fortran
&& die
->parent
18449 && die
->parent
->tag
== DW_TAG_module
18451 && startswith (cu
->producer
, "GNU Fortran "))
18452 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18454 /* A variable with DW_AT_external is never static,
18455 but it may be block-scoped. */
18456 list_to_add
= (cu
->list_in_scope
== &file_symbols
18457 ? &global_symbols
: cu
->list_in_scope
);
18460 list_to_add
= cu
->list_in_scope
;
18464 /* We do not know the address of this symbol.
18465 If it is an external symbol and we have type information
18466 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18467 The address of the variable will then be determined from
18468 the minimal symbol table whenever the variable is
18470 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18472 /* Fortran explicitly imports any global symbols to the local
18473 scope by DW_TAG_common_block. */
18474 if (cu
->language
== language_fortran
&& die
->parent
18475 && die
->parent
->tag
== DW_TAG_common_block
)
18477 /* SYMBOL_CLASS doesn't matter here because
18478 read_common_block is going to reset it. */
18480 list_to_add
= cu
->list_in_scope
;
18482 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18483 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18485 /* A variable with DW_AT_external is never static, but it
18486 may be block-scoped. */
18487 list_to_add
= (cu
->list_in_scope
== &file_symbols
18488 ? &global_symbols
: cu
->list_in_scope
);
18490 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18492 else if (!die_is_declaration (die
, cu
))
18494 /* Use the default LOC_OPTIMIZED_OUT class. */
18495 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18497 list_to_add
= cu
->list_in_scope
;
18501 case DW_TAG_formal_parameter
:
18502 /* If we are inside a function, mark this as an argument. If
18503 not, we might be looking at an argument to an inlined function
18504 when we do not have enough information to show inlined frames;
18505 pretend it's a local variable in that case so that the user can
18507 if (context_stack_depth
> 0
18508 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18509 SYMBOL_IS_ARGUMENT (sym
) = 1;
18510 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18513 var_decode_location (attr
, sym
, cu
);
18515 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18518 dwarf2_const_value (attr
, sym
, cu
);
18521 list_to_add
= cu
->list_in_scope
;
18523 case DW_TAG_unspecified_parameters
:
18524 /* From varargs functions; gdb doesn't seem to have any
18525 interest in this information, so just ignore it for now.
18528 case DW_TAG_template_type_param
:
18530 /* Fall through. */
18531 case DW_TAG_class_type
:
18532 case DW_TAG_interface_type
:
18533 case DW_TAG_structure_type
:
18534 case DW_TAG_union_type
:
18535 case DW_TAG_set_type
:
18536 case DW_TAG_enumeration_type
:
18537 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18538 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18541 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18542 really ever be static objects: otherwise, if you try
18543 to, say, break of a class's method and you're in a file
18544 which doesn't mention that class, it won't work unless
18545 the check for all static symbols in lookup_symbol_aux
18546 saves you. See the OtherFileClass tests in
18547 gdb.c++/namespace.exp. */
18551 list_to_add
= (cu
->list_in_scope
== &file_symbols
18552 && (cu
->language
== language_cplus
18553 || cu
->language
== language_java
)
18554 ? &global_symbols
: cu
->list_in_scope
);
18556 /* The semantics of C++ state that "struct foo {
18557 ... }" also defines a typedef for "foo". A Java
18558 class declaration also defines a typedef for the
18560 if (cu
->language
== language_cplus
18561 || cu
->language
== language_java
18562 || cu
->language
== language_ada
18563 || cu
->language
== language_d
)
18565 /* The symbol's name is already allocated along
18566 with this objfile, so we don't need to
18567 duplicate it for the type. */
18568 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18569 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18574 case DW_TAG_typedef
:
18575 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18576 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18577 list_to_add
= cu
->list_in_scope
;
18579 case DW_TAG_base_type
:
18580 case DW_TAG_subrange_type
:
18581 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18582 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18583 list_to_add
= cu
->list_in_scope
;
18585 case DW_TAG_enumerator
:
18586 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18589 dwarf2_const_value (attr
, sym
, cu
);
18592 /* NOTE: carlton/2003-11-10: See comment above in the
18593 DW_TAG_class_type, etc. block. */
18595 list_to_add
= (cu
->list_in_scope
== &file_symbols
18596 && (cu
->language
== language_cplus
18597 || cu
->language
== language_java
)
18598 ? &global_symbols
: cu
->list_in_scope
);
18601 case DW_TAG_imported_declaration
:
18602 case DW_TAG_namespace
:
18603 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18604 list_to_add
= &global_symbols
;
18606 case DW_TAG_module
:
18607 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18608 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18609 list_to_add
= &global_symbols
;
18611 case DW_TAG_common_block
:
18612 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18613 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18614 add_symbol_to_list (sym
, cu
->list_in_scope
);
18617 /* Not a tag we recognize. Hopefully we aren't processing
18618 trash data, but since we must specifically ignore things
18619 we don't recognize, there is nothing else we should do at
18621 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18622 dwarf_tag_name (die
->tag
));
18628 sym
->hash_next
= objfile
->template_symbols
;
18629 objfile
->template_symbols
= sym
;
18630 list_to_add
= NULL
;
18633 if (list_to_add
!= NULL
)
18634 add_symbol_to_list (sym
, list_to_add
);
18636 /* For the benefit of old versions of GCC, check for anonymous
18637 namespaces based on the demangled name. */
18638 if (!cu
->processing_has_namespace_info
18639 && cu
->language
== language_cplus
)
18640 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18645 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18647 static struct symbol
*
18648 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18650 return new_symbol_full (die
, type
, cu
, NULL
);
18653 /* Given an attr with a DW_FORM_dataN value in host byte order,
18654 zero-extend it as appropriate for the symbol's type. The DWARF
18655 standard (v4) is not entirely clear about the meaning of using
18656 DW_FORM_dataN for a constant with a signed type, where the type is
18657 wider than the data. The conclusion of a discussion on the DWARF
18658 list was that this is unspecified. We choose to always zero-extend
18659 because that is the interpretation long in use by GCC. */
18662 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18663 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18665 struct objfile
*objfile
= cu
->objfile
;
18666 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18667 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18668 LONGEST l
= DW_UNSND (attr
);
18670 if (bits
< sizeof (*value
) * 8)
18672 l
&= ((LONGEST
) 1 << bits
) - 1;
18675 else if (bits
== sizeof (*value
) * 8)
18679 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18680 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18687 /* Read a constant value from an attribute. Either set *VALUE, or if
18688 the value does not fit in *VALUE, set *BYTES - either already
18689 allocated on the objfile obstack, or newly allocated on OBSTACK,
18690 or, set *BATON, if we translated the constant to a location
18694 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18695 const char *name
, struct obstack
*obstack
,
18696 struct dwarf2_cu
*cu
,
18697 LONGEST
*value
, const gdb_byte
**bytes
,
18698 struct dwarf2_locexpr_baton
**baton
)
18700 struct objfile
*objfile
= cu
->objfile
;
18701 struct comp_unit_head
*cu_header
= &cu
->header
;
18702 struct dwarf_block
*blk
;
18703 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18704 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18710 switch (attr
->form
)
18713 case DW_FORM_GNU_addr_index
:
18717 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18718 dwarf2_const_value_length_mismatch_complaint (name
,
18719 cu_header
->addr_size
,
18720 TYPE_LENGTH (type
));
18721 /* Symbols of this form are reasonably rare, so we just
18722 piggyback on the existing location code rather than writing
18723 a new implementation of symbol_computed_ops. */
18724 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18725 (*baton
)->per_cu
= cu
->per_cu
;
18726 gdb_assert ((*baton
)->per_cu
);
18728 (*baton
)->size
= 2 + cu_header
->addr_size
;
18729 data
= obstack_alloc (obstack
, (*baton
)->size
);
18730 (*baton
)->data
= data
;
18732 data
[0] = DW_OP_addr
;
18733 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18734 byte_order
, DW_ADDR (attr
));
18735 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18738 case DW_FORM_string
:
18740 case DW_FORM_GNU_str_index
:
18741 case DW_FORM_GNU_strp_alt
:
18742 /* DW_STRING is already allocated on the objfile obstack, point
18744 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18746 case DW_FORM_block1
:
18747 case DW_FORM_block2
:
18748 case DW_FORM_block4
:
18749 case DW_FORM_block
:
18750 case DW_FORM_exprloc
:
18751 blk
= DW_BLOCK (attr
);
18752 if (TYPE_LENGTH (type
) != blk
->size
)
18753 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18754 TYPE_LENGTH (type
));
18755 *bytes
= blk
->data
;
18758 /* The DW_AT_const_value attributes are supposed to carry the
18759 symbol's value "represented as it would be on the target
18760 architecture." By the time we get here, it's already been
18761 converted to host endianness, so we just need to sign- or
18762 zero-extend it as appropriate. */
18763 case DW_FORM_data1
:
18764 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18766 case DW_FORM_data2
:
18767 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18769 case DW_FORM_data4
:
18770 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18772 case DW_FORM_data8
:
18773 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18776 case DW_FORM_sdata
:
18777 *value
= DW_SND (attr
);
18780 case DW_FORM_udata
:
18781 *value
= DW_UNSND (attr
);
18785 complaint (&symfile_complaints
,
18786 _("unsupported const value attribute form: '%s'"),
18787 dwarf_form_name (attr
->form
));
18794 /* Copy constant value from an attribute to a symbol. */
18797 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18798 struct dwarf2_cu
*cu
)
18800 struct objfile
*objfile
= cu
->objfile
;
18801 struct comp_unit_head
*cu_header
= &cu
->header
;
18803 const gdb_byte
*bytes
;
18804 struct dwarf2_locexpr_baton
*baton
;
18806 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18807 SYMBOL_PRINT_NAME (sym
),
18808 &objfile
->objfile_obstack
, cu
,
18809 &value
, &bytes
, &baton
);
18813 SYMBOL_LOCATION_BATON (sym
) = baton
;
18814 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18816 else if (bytes
!= NULL
)
18818 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18819 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18823 SYMBOL_VALUE (sym
) = value
;
18824 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18828 /* Return the type of the die in question using its DW_AT_type attribute. */
18830 static struct type
*
18831 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18833 struct attribute
*type_attr
;
18835 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18838 /* A missing DW_AT_type represents a void type. */
18839 return objfile_type (cu
->objfile
)->builtin_void
;
18842 return lookup_die_type (die
, type_attr
, cu
);
18845 /* True iff CU's producer generates GNAT Ada auxiliary information
18846 that allows to find parallel types through that information instead
18847 of having to do expensive parallel lookups by type name. */
18850 need_gnat_info (struct dwarf2_cu
*cu
)
18852 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18853 of GNAT produces this auxiliary information, without any indication
18854 that it is produced. Part of enhancing the FSF version of GNAT
18855 to produce that information will be to put in place an indicator
18856 that we can use in order to determine whether the descriptive type
18857 info is available or not. One suggestion that has been made is
18858 to use a new attribute, attached to the CU die. For now, assume
18859 that the descriptive type info is not available. */
18863 /* Return the auxiliary type of the die in question using its
18864 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18865 attribute is not present. */
18867 static struct type
*
18868 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18870 struct attribute
*type_attr
;
18872 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18876 return lookup_die_type (die
, type_attr
, cu
);
18879 /* If DIE has a descriptive_type attribute, then set the TYPE's
18880 descriptive type accordingly. */
18883 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18884 struct dwarf2_cu
*cu
)
18886 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18888 if (descriptive_type
)
18890 ALLOCATE_GNAT_AUX_TYPE (type
);
18891 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18895 /* Return the containing type of the die in question using its
18896 DW_AT_containing_type attribute. */
18898 static struct type
*
18899 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18901 struct attribute
*type_attr
;
18903 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18905 error (_("Dwarf Error: Problem turning containing type into gdb type "
18906 "[in module %s]"), objfile_name (cu
->objfile
));
18908 return lookup_die_type (die
, type_attr
, cu
);
18911 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18913 static struct type
*
18914 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18916 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18917 char *message
, *saved
;
18919 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18920 objfile_name (objfile
),
18921 cu
->header
.offset
.sect_off
,
18922 die
->offset
.sect_off
);
18923 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18924 message
, strlen (message
));
18927 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18930 /* Look up the type of DIE in CU using its type attribute ATTR.
18931 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18932 DW_AT_containing_type.
18933 If there is no type substitute an error marker. */
18935 static struct type
*
18936 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18937 struct dwarf2_cu
*cu
)
18939 struct objfile
*objfile
= cu
->objfile
;
18940 struct type
*this_type
;
18942 gdb_assert (attr
->name
== DW_AT_type
18943 || attr
->name
== DW_AT_GNAT_descriptive_type
18944 || attr
->name
== DW_AT_containing_type
);
18946 /* First see if we have it cached. */
18948 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18950 struct dwarf2_per_cu_data
*per_cu
;
18951 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18953 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18954 this_type
= get_die_type_at_offset (offset
, per_cu
);
18956 else if (attr_form_is_ref (attr
))
18958 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18960 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18962 else if (attr
->form
== DW_FORM_ref_sig8
)
18964 ULONGEST signature
= DW_SIGNATURE (attr
);
18966 return get_signatured_type (die
, signature
, cu
);
18970 complaint (&symfile_complaints
,
18971 _("Dwarf Error: Bad type attribute %s in DIE"
18972 " at 0x%x [in module %s]"),
18973 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18974 objfile_name (objfile
));
18975 return build_error_marker_type (cu
, die
);
18978 /* If not cached we need to read it in. */
18980 if (this_type
== NULL
)
18982 struct die_info
*type_die
= NULL
;
18983 struct dwarf2_cu
*type_cu
= cu
;
18985 if (attr_form_is_ref (attr
))
18986 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18987 if (type_die
== NULL
)
18988 return build_error_marker_type (cu
, die
);
18989 /* If we find the type now, it's probably because the type came
18990 from an inter-CU reference and the type's CU got expanded before
18992 this_type
= read_type_die (type_die
, type_cu
);
18995 /* If we still don't have a type use an error marker. */
18997 if (this_type
== NULL
)
18998 return build_error_marker_type (cu
, die
);
19003 /* Return the type in DIE, CU.
19004 Returns NULL for invalid types.
19006 This first does a lookup in die_type_hash,
19007 and only reads the die in if necessary.
19009 NOTE: This can be called when reading in partial or full symbols. */
19011 static struct type
*
19012 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19014 struct type
*this_type
;
19016 this_type
= get_die_type (die
, cu
);
19020 return read_type_die_1 (die
, cu
);
19023 /* Read the type in DIE, CU.
19024 Returns NULL for invalid types. */
19026 static struct type
*
19027 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19029 struct type
*this_type
= NULL
;
19033 case DW_TAG_class_type
:
19034 case DW_TAG_interface_type
:
19035 case DW_TAG_structure_type
:
19036 case DW_TAG_union_type
:
19037 this_type
= read_structure_type (die
, cu
);
19039 case DW_TAG_enumeration_type
:
19040 this_type
= read_enumeration_type (die
, cu
);
19042 case DW_TAG_subprogram
:
19043 case DW_TAG_subroutine_type
:
19044 case DW_TAG_inlined_subroutine
:
19045 this_type
= read_subroutine_type (die
, cu
);
19047 case DW_TAG_array_type
:
19048 this_type
= read_array_type (die
, cu
);
19050 case DW_TAG_set_type
:
19051 this_type
= read_set_type (die
, cu
);
19053 case DW_TAG_pointer_type
:
19054 this_type
= read_tag_pointer_type (die
, cu
);
19056 case DW_TAG_ptr_to_member_type
:
19057 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19059 case DW_TAG_reference_type
:
19060 this_type
= read_tag_reference_type (die
, cu
);
19062 case DW_TAG_const_type
:
19063 this_type
= read_tag_const_type (die
, cu
);
19065 case DW_TAG_volatile_type
:
19066 this_type
= read_tag_volatile_type (die
, cu
);
19068 case DW_TAG_restrict_type
:
19069 this_type
= read_tag_restrict_type (die
, cu
);
19071 case DW_TAG_string_type
:
19072 this_type
= read_tag_string_type (die
, cu
);
19074 case DW_TAG_typedef
:
19075 this_type
= read_typedef (die
, cu
);
19077 case DW_TAG_subrange_type
:
19078 this_type
= read_subrange_type (die
, cu
);
19080 case DW_TAG_base_type
:
19081 this_type
= read_base_type (die
, cu
);
19083 case DW_TAG_unspecified_type
:
19084 this_type
= read_unspecified_type (die
, cu
);
19086 case DW_TAG_namespace
:
19087 this_type
= read_namespace_type (die
, cu
);
19089 case DW_TAG_module
:
19090 this_type
= read_module_type (die
, cu
);
19092 case DW_TAG_atomic_type
:
19093 this_type
= read_tag_atomic_type (die
, cu
);
19096 complaint (&symfile_complaints
,
19097 _("unexpected tag in read_type_die: '%s'"),
19098 dwarf_tag_name (die
->tag
));
19105 /* See if we can figure out if the class lives in a namespace. We do
19106 this by looking for a member function; its demangled name will
19107 contain namespace info, if there is any.
19108 Return the computed name or NULL.
19109 Space for the result is allocated on the objfile's obstack.
19110 This is the full-die version of guess_partial_die_structure_name.
19111 In this case we know DIE has no useful parent. */
19114 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19116 struct die_info
*spec_die
;
19117 struct dwarf2_cu
*spec_cu
;
19118 struct die_info
*child
;
19121 spec_die
= die_specification (die
, &spec_cu
);
19122 if (spec_die
!= NULL
)
19128 for (child
= die
->child
;
19130 child
= child
->sibling
)
19132 if (child
->tag
== DW_TAG_subprogram
)
19134 struct attribute
*attr
;
19136 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
19138 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
19142 = language_class_name_from_physname (cu
->language_defn
,
19146 if (actual_name
!= NULL
)
19148 const char *die_name
= dwarf2_name (die
, cu
);
19150 if (die_name
!= NULL
19151 && strcmp (die_name
, actual_name
) != 0)
19153 /* Strip off the class name from the full name.
19154 We want the prefix. */
19155 int die_name_len
= strlen (die_name
);
19156 int actual_name_len
= strlen (actual_name
);
19158 /* Test for '::' as a sanity check. */
19159 if (actual_name_len
> die_name_len
+ 2
19160 && actual_name
[actual_name_len
19161 - die_name_len
- 1] == ':')
19163 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19165 actual_name_len
- die_name_len
- 2);
19168 xfree (actual_name
);
19177 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19178 prefix part in such case. See
19179 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19182 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19184 struct attribute
*attr
;
19187 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19188 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19191 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19192 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19195 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19197 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19198 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19201 /* dwarf2_name had to be already called. */
19202 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19204 /* Strip the base name, keep any leading namespaces/classes. */
19205 base
= strrchr (DW_STRING (attr
), ':');
19206 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19209 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19210 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
19213 /* Return the name of the namespace/class that DIE is defined within,
19214 or "" if we can't tell. The caller should not xfree the result.
19216 For example, if we're within the method foo() in the following
19226 then determine_prefix on foo's die will return "N::C". */
19228 static const char *
19229 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19231 struct die_info
*parent
, *spec_die
;
19232 struct dwarf2_cu
*spec_cu
;
19233 struct type
*parent_type
;
19236 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19237 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
)
19240 retval
= anonymous_struct_prefix (die
, cu
);
19244 /* We have to be careful in the presence of DW_AT_specification.
19245 For example, with GCC 3.4, given the code
19249 // Definition of N::foo.
19253 then we'll have a tree of DIEs like this:
19255 1: DW_TAG_compile_unit
19256 2: DW_TAG_namespace // N
19257 3: DW_TAG_subprogram // declaration of N::foo
19258 4: DW_TAG_subprogram // definition of N::foo
19259 DW_AT_specification // refers to die #3
19261 Thus, when processing die #4, we have to pretend that we're in
19262 the context of its DW_AT_specification, namely the contex of die
19265 spec_die
= die_specification (die
, &spec_cu
);
19266 if (spec_die
== NULL
)
19267 parent
= die
->parent
;
19270 parent
= spec_die
->parent
;
19274 if (parent
== NULL
)
19276 else if (parent
->building_fullname
)
19279 const char *parent_name
;
19281 /* It has been seen on RealView 2.2 built binaries,
19282 DW_TAG_template_type_param types actually _defined_ as
19283 children of the parent class:
19286 template class <class Enum> Class{};
19287 Class<enum E> class_e;
19289 1: DW_TAG_class_type (Class)
19290 2: DW_TAG_enumeration_type (E)
19291 3: DW_TAG_enumerator (enum1:0)
19292 3: DW_TAG_enumerator (enum2:1)
19294 2: DW_TAG_template_type_param
19295 DW_AT_type DW_FORM_ref_udata (E)
19297 Besides being broken debug info, it can put GDB into an
19298 infinite loop. Consider:
19300 When we're building the full name for Class<E>, we'll start
19301 at Class, and go look over its template type parameters,
19302 finding E. We'll then try to build the full name of E, and
19303 reach here. We're now trying to build the full name of E,
19304 and look over the parent DIE for containing scope. In the
19305 broken case, if we followed the parent DIE of E, we'd again
19306 find Class, and once again go look at its template type
19307 arguments, etc., etc. Simply don't consider such parent die
19308 as source-level parent of this die (it can't be, the language
19309 doesn't allow it), and break the loop here. */
19310 name
= dwarf2_name (die
, cu
);
19311 parent_name
= dwarf2_name (parent
, cu
);
19312 complaint (&symfile_complaints
,
19313 _("template param type '%s' defined within parent '%s'"),
19314 name
? name
: "<unknown>",
19315 parent_name
? parent_name
: "<unknown>");
19319 switch (parent
->tag
)
19321 case DW_TAG_namespace
:
19322 parent_type
= read_type_die (parent
, cu
);
19323 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19324 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19325 Work around this problem here. */
19326 if (cu
->language
== language_cplus
19327 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19329 /* We give a name to even anonymous namespaces. */
19330 return TYPE_TAG_NAME (parent_type
);
19331 case DW_TAG_class_type
:
19332 case DW_TAG_interface_type
:
19333 case DW_TAG_structure_type
:
19334 case DW_TAG_union_type
:
19335 case DW_TAG_module
:
19336 parent_type
= read_type_die (parent
, cu
);
19337 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19338 return TYPE_TAG_NAME (parent_type
);
19340 /* An anonymous structure is only allowed non-static data
19341 members; no typedefs, no member functions, et cetera.
19342 So it does not need a prefix. */
19344 case DW_TAG_compile_unit
:
19345 case DW_TAG_partial_unit
:
19346 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19347 if (cu
->language
== language_cplus
19348 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19349 && die
->child
!= NULL
19350 && (die
->tag
== DW_TAG_class_type
19351 || die
->tag
== DW_TAG_structure_type
19352 || die
->tag
== DW_TAG_union_type
))
19354 char *name
= guess_full_die_structure_name (die
, cu
);
19359 case DW_TAG_enumeration_type
:
19360 parent_type
= read_type_die (parent
, cu
);
19361 if (TYPE_DECLARED_CLASS (parent_type
))
19363 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19364 return TYPE_TAG_NAME (parent_type
);
19367 /* Fall through. */
19369 return determine_prefix (parent
, cu
);
19373 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19374 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19375 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19376 an obconcat, otherwise allocate storage for the result. The CU argument is
19377 used to determine the language and hence, the appropriate separator. */
19379 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19382 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19383 int physname
, struct dwarf2_cu
*cu
)
19385 const char *lead
= "";
19388 if (suffix
== NULL
|| suffix
[0] == '\0'
19389 || prefix
== NULL
|| prefix
[0] == '\0')
19391 else if (cu
->language
== language_java
)
19393 else if (cu
->language
== language_d
)
19395 /* For D, the 'main' function could be defined in any module, but it
19396 should never be prefixed. */
19397 if (strcmp (suffix
, "D main") == 0)
19405 else if (cu
->language
== language_fortran
&& physname
)
19407 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19408 DW_AT_MIPS_linkage_name is preferred and used instead. */
19416 if (prefix
== NULL
)
19418 if (suffix
== NULL
)
19424 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19426 strcpy (retval
, lead
);
19427 strcat (retval
, prefix
);
19428 strcat (retval
, sep
);
19429 strcat (retval
, suffix
);
19434 /* We have an obstack. */
19435 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19439 /* Return sibling of die, NULL if no sibling. */
19441 static struct die_info
*
19442 sibling_die (struct die_info
*die
)
19444 return die
->sibling
;
19447 /* Get name of a die, return NULL if not found. */
19449 static const char *
19450 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19451 struct obstack
*obstack
)
19453 if (name
&& cu
->language
== language_cplus
)
19455 char *canon_name
= cp_canonicalize_string (name
);
19457 if (canon_name
!= NULL
)
19459 if (strcmp (canon_name
, name
) != 0)
19460 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19461 xfree (canon_name
);
19468 /* Get name of a die, return NULL if not found.
19469 Anonymous namespaces are converted to their magic string. */
19471 static const char *
19472 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19474 struct attribute
*attr
;
19476 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19477 if ((!attr
|| !DW_STRING (attr
))
19478 && die
->tag
!= DW_TAG_namespace
19479 && die
->tag
!= DW_TAG_class_type
19480 && die
->tag
!= DW_TAG_interface_type
19481 && die
->tag
!= DW_TAG_structure_type
19482 && die
->tag
!= DW_TAG_union_type
)
19487 case DW_TAG_compile_unit
:
19488 case DW_TAG_partial_unit
:
19489 /* Compilation units have a DW_AT_name that is a filename, not
19490 a source language identifier. */
19491 case DW_TAG_enumeration_type
:
19492 case DW_TAG_enumerator
:
19493 /* These tags always have simple identifiers already; no need
19494 to canonicalize them. */
19495 return DW_STRING (attr
);
19497 case DW_TAG_namespace
:
19498 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19499 return DW_STRING (attr
);
19500 return CP_ANONYMOUS_NAMESPACE_STR
;
19502 case DW_TAG_subprogram
:
19503 /* Java constructors will all be named "<init>", so return
19504 the class name when we see this special case. */
19505 if (cu
->language
== language_java
19506 && DW_STRING (attr
) != NULL
19507 && strcmp (DW_STRING (attr
), "<init>") == 0)
19509 struct dwarf2_cu
*spec_cu
= cu
;
19510 struct die_info
*spec_die
;
19512 /* GCJ will output '<init>' for Java constructor names.
19513 For this special case, return the name of the parent class. */
19515 /* GCJ may output subprogram DIEs with AT_specification set.
19516 If so, use the name of the specified DIE. */
19517 spec_die
= die_specification (die
, &spec_cu
);
19518 if (spec_die
!= NULL
)
19519 return dwarf2_name (spec_die
, spec_cu
);
19524 if (die
->tag
== DW_TAG_class_type
)
19525 return dwarf2_name (die
, cu
);
19527 while (die
->tag
!= DW_TAG_compile_unit
19528 && die
->tag
!= DW_TAG_partial_unit
);
19532 case DW_TAG_class_type
:
19533 case DW_TAG_interface_type
:
19534 case DW_TAG_structure_type
:
19535 case DW_TAG_union_type
:
19536 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19537 structures or unions. These were of the form "._%d" in GCC 4.1,
19538 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19539 and GCC 4.4. We work around this problem by ignoring these. */
19540 if (attr
&& DW_STRING (attr
)
19541 && (startswith (DW_STRING (attr
), "._")
19542 || startswith (DW_STRING (attr
), "<anonymous")))
19545 /* GCC might emit a nameless typedef that has a linkage name. See
19546 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19547 if (!attr
|| DW_STRING (attr
) == NULL
)
19549 char *demangled
= NULL
;
19551 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19553 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19555 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19558 /* Avoid demangling DW_STRING (attr) the second time on a second
19559 call for the same DIE. */
19560 if (!DW_STRING_IS_CANONICAL (attr
))
19561 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19567 /* FIXME: we already did this for the partial symbol... */
19569 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19570 demangled
, strlen (demangled
));
19571 DW_STRING_IS_CANONICAL (attr
) = 1;
19574 /* Strip any leading namespaces/classes, keep only the base name.
19575 DW_AT_name for named DIEs does not contain the prefixes. */
19576 base
= strrchr (DW_STRING (attr
), ':');
19577 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19580 return DW_STRING (attr
);
19589 if (!DW_STRING_IS_CANONICAL (attr
))
19592 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19593 &cu
->objfile
->per_bfd
->storage_obstack
);
19594 DW_STRING_IS_CANONICAL (attr
) = 1;
19596 return DW_STRING (attr
);
19599 /* Return the die that this die in an extension of, or NULL if there
19600 is none. *EXT_CU is the CU containing DIE on input, and the CU
19601 containing the return value on output. */
19603 static struct die_info
*
19604 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19606 struct attribute
*attr
;
19608 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19612 return follow_die_ref (die
, attr
, ext_cu
);
19615 /* Convert a DIE tag into its string name. */
19617 static const char *
19618 dwarf_tag_name (unsigned tag
)
19620 const char *name
= get_DW_TAG_name (tag
);
19623 return "DW_TAG_<unknown>";
19628 /* Convert a DWARF attribute code into its string name. */
19630 static const char *
19631 dwarf_attr_name (unsigned attr
)
19635 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19636 if (attr
== DW_AT_MIPS_fde
)
19637 return "DW_AT_MIPS_fde";
19639 if (attr
== DW_AT_HP_block_index
)
19640 return "DW_AT_HP_block_index";
19643 name
= get_DW_AT_name (attr
);
19646 return "DW_AT_<unknown>";
19651 /* Convert a DWARF value form code into its string name. */
19653 static const char *
19654 dwarf_form_name (unsigned form
)
19656 const char *name
= get_DW_FORM_name (form
);
19659 return "DW_FORM_<unknown>";
19665 dwarf_bool_name (unsigned mybool
)
19673 /* Convert a DWARF type code into its string name. */
19675 static const char *
19676 dwarf_type_encoding_name (unsigned enc
)
19678 const char *name
= get_DW_ATE_name (enc
);
19681 return "DW_ATE_<unknown>";
19687 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19691 print_spaces (indent
, f
);
19692 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19693 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19695 if (die
->parent
!= NULL
)
19697 print_spaces (indent
, f
);
19698 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19699 die
->parent
->offset
.sect_off
);
19702 print_spaces (indent
, f
);
19703 fprintf_unfiltered (f
, " has children: %s\n",
19704 dwarf_bool_name (die
->child
!= NULL
));
19706 print_spaces (indent
, f
);
19707 fprintf_unfiltered (f
, " attributes:\n");
19709 for (i
= 0; i
< die
->num_attrs
; ++i
)
19711 print_spaces (indent
, f
);
19712 fprintf_unfiltered (f
, " %s (%s) ",
19713 dwarf_attr_name (die
->attrs
[i
].name
),
19714 dwarf_form_name (die
->attrs
[i
].form
));
19716 switch (die
->attrs
[i
].form
)
19719 case DW_FORM_GNU_addr_index
:
19720 fprintf_unfiltered (f
, "address: ");
19721 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19723 case DW_FORM_block2
:
19724 case DW_FORM_block4
:
19725 case DW_FORM_block
:
19726 case DW_FORM_block1
:
19727 fprintf_unfiltered (f
, "block: size %s",
19728 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19730 case DW_FORM_exprloc
:
19731 fprintf_unfiltered (f
, "expression: size %s",
19732 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19734 case DW_FORM_ref_addr
:
19735 fprintf_unfiltered (f
, "ref address: ");
19736 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19738 case DW_FORM_GNU_ref_alt
:
19739 fprintf_unfiltered (f
, "alt ref address: ");
19740 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19746 case DW_FORM_ref_udata
:
19747 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19748 (long) (DW_UNSND (&die
->attrs
[i
])));
19750 case DW_FORM_data1
:
19751 case DW_FORM_data2
:
19752 case DW_FORM_data4
:
19753 case DW_FORM_data8
:
19754 case DW_FORM_udata
:
19755 case DW_FORM_sdata
:
19756 fprintf_unfiltered (f
, "constant: %s",
19757 pulongest (DW_UNSND (&die
->attrs
[i
])));
19759 case DW_FORM_sec_offset
:
19760 fprintf_unfiltered (f
, "section offset: %s",
19761 pulongest (DW_UNSND (&die
->attrs
[i
])));
19763 case DW_FORM_ref_sig8
:
19764 fprintf_unfiltered (f
, "signature: %s",
19765 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19767 case DW_FORM_string
:
19769 case DW_FORM_GNU_str_index
:
19770 case DW_FORM_GNU_strp_alt
:
19771 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19772 DW_STRING (&die
->attrs
[i
])
19773 ? DW_STRING (&die
->attrs
[i
]) : "",
19774 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19777 if (DW_UNSND (&die
->attrs
[i
]))
19778 fprintf_unfiltered (f
, "flag: TRUE");
19780 fprintf_unfiltered (f
, "flag: FALSE");
19782 case DW_FORM_flag_present
:
19783 fprintf_unfiltered (f
, "flag: TRUE");
19785 case DW_FORM_indirect
:
19786 /* The reader will have reduced the indirect form to
19787 the "base form" so this form should not occur. */
19788 fprintf_unfiltered (f
,
19789 "unexpected attribute form: DW_FORM_indirect");
19792 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19793 die
->attrs
[i
].form
);
19796 fprintf_unfiltered (f
, "\n");
19801 dump_die_for_error (struct die_info
*die
)
19803 dump_die_shallow (gdb_stderr
, 0, die
);
19807 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19809 int indent
= level
* 4;
19811 gdb_assert (die
!= NULL
);
19813 if (level
>= max_level
)
19816 dump_die_shallow (f
, indent
, die
);
19818 if (die
->child
!= NULL
)
19820 print_spaces (indent
, f
);
19821 fprintf_unfiltered (f
, " Children:");
19822 if (level
+ 1 < max_level
)
19824 fprintf_unfiltered (f
, "\n");
19825 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19829 fprintf_unfiltered (f
,
19830 " [not printed, max nesting level reached]\n");
19834 if (die
->sibling
!= NULL
&& level
> 0)
19836 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19840 /* This is called from the pdie macro in gdbinit.in.
19841 It's not static so gcc will keep a copy callable from gdb. */
19844 dump_die (struct die_info
*die
, int max_level
)
19846 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19850 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19854 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19860 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19864 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19866 sect_offset retval
= { DW_UNSND (attr
) };
19868 if (attr_form_is_ref (attr
))
19871 retval
.sect_off
= 0;
19872 complaint (&symfile_complaints
,
19873 _("unsupported die ref attribute form: '%s'"),
19874 dwarf_form_name (attr
->form
));
19878 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19879 * the value held by the attribute is not constant. */
19882 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19884 if (attr
->form
== DW_FORM_sdata
)
19885 return DW_SND (attr
);
19886 else if (attr
->form
== DW_FORM_udata
19887 || attr
->form
== DW_FORM_data1
19888 || attr
->form
== DW_FORM_data2
19889 || attr
->form
== DW_FORM_data4
19890 || attr
->form
== DW_FORM_data8
)
19891 return DW_UNSND (attr
);
19894 complaint (&symfile_complaints
,
19895 _("Attribute value is not a constant (%s)"),
19896 dwarf_form_name (attr
->form
));
19897 return default_value
;
19901 /* Follow reference or signature attribute ATTR of SRC_DIE.
19902 On entry *REF_CU is the CU of SRC_DIE.
19903 On exit *REF_CU is the CU of the result. */
19905 static struct die_info
*
19906 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19907 struct dwarf2_cu
**ref_cu
)
19909 struct die_info
*die
;
19911 if (attr_form_is_ref (attr
))
19912 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19913 else if (attr
->form
== DW_FORM_ref_sig8
)
19914 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19917 dump_die_for_error (src_die
);
19918 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19919 objfile_name ((*ref_cu
)->objfile
));
19925 /* Follow reference OFFSET.
19926 On entry *REF_CU is the CU of the source die referencing OFFSET.
19927 On exit *REF_CU is the CU of the result.
19928 Returns NULL if OFFSET is invalid. */
19930 static struct die_info
*
19931 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19932 struct dwarf2_cu
**ref_cu
)
19934 struct die_info temp_die
;
19935 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19937 gdb_assert (cu
->per_cu
!= NULL
);
19941 if (cu
->per_cu
->is_debug_types
)
19943 /* .debug_types CUs cannot reference anything outside their CU.
19944 If they need to, they have to reference a signatured type via
19945 DW_FORM_ref_sig8. */
19946 if (! offset_in_cu_p (&cu
->header
, offset
))
19949 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19950 || ! offset_in_cu_p (&cu
->header
, offset
))
19952 struct dwarf2_per_cu_data
*per_cu
;
19954 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19957 /* If necessary, add it to the queue and load its DIEs. */
19958 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19959 load_full_comp_unit (per_cu
, cu
->language
);
19961 target_cu
= per_cu
->cu
;
19963 else if (cu
->dies
== NULL
)
19965 /* We're loading full DIEs during partial symbol reading. */
19966 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19967 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19970 *ref_cu
= target_cu
;
19971 temp_die
.offset
= offset
;
19972 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19975 /* Follow reference attribute ATTR of SRC_DIE.
19976 On entry *REF_CU is the CU of SRC_DIE.
19977 On exit *REF_CU is the CU of the result. */
19979 static struct die_info
*
19980 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19981 struct dwarf2_cu
**ref_cu
)
19983 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19984 struct dwarf2_cu
*cu
= *ref_cu
;
19985 struct die_info
*die
;
19987 die
= follow_die_offset (offset
,
19988 (attr
->form
== DW_FORM_GNU_ref_alt
19989 || cu
->per_cu
->is_dwz
),
19992 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19993 "at 0x%x [in module %s]"),
19994 offset
.sect_off
, src_die
->offset
.sect_off
,
19995 objfile_name (cu
->objfile
));
20000 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20001 Returned value is intended for DW_OP_call*. Returned
20002 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20004 struct dwarf2_locexpr_baton
20005 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20006 struct dwarf2_per_cu_data
*per_cu
,
20007 CORE_ADDR (*get_frame_pc
) (void *baton
),
20010 struct dwarf2_cu
*cu
;
20011 struct die_info
*die
;
20012 struct attribute
*attr
;
20013 struct dwarf2_locexpr_baton retval
;
20015 dw2_setup (per_cu
->objfile
);
20017 if (per_cu
->cu
== NULL
)
20021 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20023 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20024 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20026 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20029 /* DWARF: "If there is no such attribute, then there is no effect.".
20030 DATA is ignored if SIZE is 0. */
20032 retval
.data
= NULL
;
20035 else if (attr_form_is_section_offset (attr
))
20037 struct dwarf2_loclist_baton loclist_baton
;
20038 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20041 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20043 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20045 retval
.size
= size
;
20049 if (!attr_form_is_block (attr
))
20050 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20051 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20052 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20054 retval
.data
= DW_BLOCK (attr
)->data
;
20055 retval
.size
= DW_BLOCK (attr
)->size
;
20057 retval
.per_cu
= cu
->per_cu
;
20059 age_cached_comp_units ();
20064 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20067 struct dwarf2_locexpr_baton
20068 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20069 struct dwarf2_per_cu_data
*per_cu
,
20070 CORE_ADDR (*get_frame_pc
) (void *baton
),
20073 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20075 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20078 /* Write a constant of a given type as target-ordered bytes into
20081 static const gdb_byte
*
20082 write_constant_as_bytes (struct obstack
*obstack
,
20083 enum bfd_endian byte_order
,
20090 *len
= TYPE_LENGTH (type
);
20091 result
= obstack_alloc (obstack
, *len
);
20092 store_unsigned_integer (result
, *len
, byte_order
, value
);
20097 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20098 pointer to the constant bytes and set LEN to the length of the
20099 data. If memory is needed, allocate it on OBSTACK. If the DIE
20100 does not have a DW_AT_const_value, return NULL. */
20103 dwarf2_fetch_constant_bytes (sect_offset offset
,
20104 struct dwarf2_per_cu_data
*per_cu
,
20105 struct obstack
*obstack
,
20108 struct dwarf2_cu
*cu
;
20109 struct die_info
*die
;
20110 struct attribute
*attr
;
20111 const gdb_byte
*result
= NULL
;
20114 enum bfd_endian byte_order
;
20116 dw2_setup (per_cu
->objfile
);
20118 if (per_cu
->cu
== NULL
)
20122 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20124 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20125 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20128 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20132 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20133 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20135 switch (attr
->form
)
20138 case DW_FORM_GNU_addr_index
:
20142 *len
= cu
->header
.addr_size
;
20143 tem
= obstack_alloc (obstack
, *len
);
20144 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20148 case DW_FORM_string
:
20150 case DW_FORM_GNU_str_index
:
20151 case DW_FORM_GNU_strp_alt
:
20152 /* DW_STRING is already allocated on the objfile obstack, point
20154 result
= (const gdb_byte
*) DW_STRING (attr
);
20155 *len
= strlen (DW_STRING (attr
));
20157 case DW_FORM_block1
:
20158 case DW_FORM_block2
:
20159 case DW_FORM_block4
:
20160 case DW_FORM_block
:
20161 case DW_FORM_exprloc
:
20162 result
= DW_BLOCK (attr
)->data
;
20163 *len
= DW_BLOCK (attr
)->size
;
20166 /* The DW_AT_const_value attributes are supposed to carry the
20167 symbol's value "represented as it would be on the target
20168 architecture." By the time we get here, it's already been
20169 converted to host endianness, so we just need to sign- or
20170 zero-extend it as appropriate. */
20171 case DW_FORM_data1
:
20172 type
= die_type (die
, cu
);
20173 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20174 if (result
== NULL
)
20175 result
= write_constant_as_bytes (obstack
, byte_order
,
20178 case DW_FORM_data2
:
20179 type
= die_type (die
, cu
);
20180 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20181 if (result
== NULL
)
20182 result
= write_constant_as_bytes (obstack
, byte_order
,
20185 case DW_FORM_data4
:
20186 type
= die_type (die
, cu
);
20187 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20188 if (result
== NULL
)
20189 result
= write_constant_as_bytes (obstack
, byte_order
,
20192 case DW_FORM_data8
:
20193 type
= die_type (die
, cu
);
20194 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20195 if (result
== NULL
)
20196 result
= write_constant_as_bytes (obstack
, byte_order
,
20200 case DW_FORM_sdata
:
20201 type
= die_type (die
, cu
);
20202 result
= write_constant_as_bytes (obstack
, byte_order
,
20203 type
, DW_SND (attr
), len
);
20206 case DW_FORM_udata
:
20207 type
= die_type (die
, cu
);
20208 result
= write_constant_as_bytes (obstack
, byte_order
,
20209 type
, DW_UNSND (attr
), len
);
20213 complaint (&symfile_complaints
,
20214 _("unsupported const value attribute form: '%s'"),
20215 dwarf_form_name (attr
->form
));
20222 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20226 dwarf2_get_die_type (cu_offset die_offset
,
20227 struct dwarf2_per_cu_data
*per_cu
)
20229 sect_offset die_offset_sect
;
20231 dw2_setup (per_cu
->objfile
);
20233 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20234 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20237 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20238 On entry *REF_CU is the CU of SRC_DIE.
20239 On exit *REF_CU is the CU of the result.
20240 Returns NULL if the referenced DIE isn't found. */
20242 static struct die_info
*
20243 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20244 struct dwarf2_cu
**ref_cu
)
20246 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20247 struct die_info temp_die
;
20248 struct dwarf2_cu
*sig_cu
;
20249 struct die_info
*die
;
20251 /* While it might be nice to assert sig_type->type == NULL here,
20252 we can get here for DW_AT_imported_declaration where we need
20253 the DIE not the type. */
20255 /* If necessary, add it to the queue and load its DIEs. */
20257 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20258 read_signatured_type (sig_type
);
20260 sig_cu
= sig_type
->per_cu
.cu
;
20261 gdb_assert (sig_cu
!= NULL
);
20262 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20263 temp_die
.offset
= sig_type
->type_offset_in_section
;
20264 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20265 temp_die
.offset
.sect_off
);
20268 /* For .gdb_index version 7 keep track of included TUs.
20269 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20270 if (dwarf2_per_objfile
->index_table
!= NULL
20271 && dwarf2_per_objfile
->index_table
->version
<= 7)
20273 VEC_safe_push (dwarf2_per_cu_ptr
,
20274 (*ref_cu
)->per_cu
->imported_symtabs
,
20285 /* Follow signatured type referenced by ATTR in SRC_DIE.
20286 On entry *REF_CU is the CU of SRC_DIE.
20287 On exit *REF_CU is the CU of the result.
20288 The result is the DIE of the type.
20289 If the referenced type cannot be found an error is thrown. */
20291 static struct die_info
*
20292 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20293 struct dwarf2_cu
**ref_cu
)
20295 ULONGEST signature
= DW_SIGNATURE (attr
);
20296 struct signatured_type
*sig_type
;
20297 struct die_info
*die
;
20299 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20301 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20302 /* sig_type will be NULL if the signatured type is missing from
20304 if (sig_type
== NULL
)
20306 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20307 " from DIE at 0x%x [in module %s]"),
20308 hex_string (signature
), src_die
->offset
.sect_off
,
20309 objfile_name ((*ref_cu
)->objfile
));
20312 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20315 dump_die_for_error (src_die
);
20316 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20317 " from DIE at 0x%x [in module %s]"),
20318 hex_string (signature
), src_die
->offset
.sect_off
,
20319 objfile_name ((*ref_cu
)->objfile
));
20325 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20326 reading in and processing the type unit if necessary. */
20328 static struct type
*
20329 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20330 struct dwarf2_cu
*cu
)
20332 struct signatured_type
*sig_type
;
20333 struct dwarf2_cu
*type_cu
;
20334 struct die_info
*type_die
;
20337 sig_type
= lookup_signatured_type (cu
, signature
);
20338 /* sig_type will be NULL if the signatured type is missing from
20340 if (sig_type
== NULL
)
20342 complaint (&symfile_complaints
,
20343 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20344 " from DIE at 0x%x [in module %s]"),
20345 hex_string (signature
), die
->offset
.sect_off
,
20346 objfile_name (dwarf2_per_objfile
->objfile
));
20347 return build_error_marker_type (cu
, die
);
20350 /* If we already know the type we're done. */
20351 if (sig_type
->type
!= NULL
)
20352 return sig_type
->type
;
20355 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20356 if (type_die
!= NULL
)
20358 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20359 is created. This is important, for example, because for c++ classes
20360 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20361 type
= read_type_die (type_die
, type_cu
);
20364 complaint (&symfile_complaints
,
20365 _("Dwarf Error: Cannot build signatured type %s"
20366 " referenced from DIE at 0x%x [in module %s]"),
20367 hex_string (signature
), die
->offset
.sect_off
,
20368 objfile_name (dwarf2_per_objfile
->objfile
));
20369 type
= build_error_marker_type (cu
, die
);
20374 complaint (&symfile_complaints
,
20375 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20376 " from DIE at 0x%x [in module %s]"),
20377 hex_string (signature
), die
->offset
.sect_off
,
20378 objfile_name (dwarf2_per_objfile
->objfile
));
20379 type
= build_error_marker_type (cu
, die
);
20381 sig_type
->type
= type
;
20386 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20387 reading in and processing the type unit if necessary. */
20389 static struct type
*
20390 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20391 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20393 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20394 if (attr_form_is_ref (attr
))
20396 struct dwarf2_cu
*type_cu
= cu
;
20397 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20399 return read_type_die (type_die
, type_cu
);
20401 else if (attr
->form
== DW_FORM_ref_sig8
)
20403 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20407 complaint (&symfile_complaints
,
20408 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20409 " at 0x%x [in module %s]"),
20410 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20411 objfile_name (dwarf2_per_objfile
->objfile
));
20412 return build_error_marker_type (cu
, die
);
20416 /* Load the DIEs associated with type unit PER_CU into memory. */
20419 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20421 struct signatured_type
*sig_type
;
20423 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20424 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20426 /* We have the per_cu, but we need the signatured_type.
20427 Fortunately this is an easy translation. */
20428 gdb_assert (per_cu
->is_debug_types
);
20429 sig_type
= (struct signatured_type
*) per_cu
;
20431 gdb_assert (per_cu
->cu
== NULL
);
20433 read_signatured_type (sig_type
);
20435 gdb_assert (per_cu
->cu
!= NULL
);
20438 /* die_reader_func for read_signatured_type.
20439 This is identical to load_full_comp_unit_reader,
20440 but is kept separate for now. */
20443 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20444 const gdb_byte
*info_ptr
,
20445 struct die_info
*comp_unit_die
,
20449 struct dwarf2_cu
*cu
= reader
->cu
;
20451 gdb_assert (cu
->die_hash
== NULL
);
20453 htab_create_alloc_ex (cu
->header
.length
/ 12,
20457 &cu
->comp_unit_obstack
,
20458 hashtab_obstack_allocate
,
20459 dummy_obstack_deallocate
);
20462 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20463 &info_ptr
, comp_unit_die
);
20464 cu
->dies
= comp_unit_die
;
20465 /* comp_unit_die is not stored in die_hash, no need. */
20467 /* We try not to read any attributes in this function, because not
20468 all CUs needed for references have been loaded yet, and symbol
20469 table processing isn't initialized. But we have to set the CU language,
20470 or we won't be able to build types correctly.
20471 Similarly, if we do not read the producer, we can not apply
20472 producer-specific interpretation. */
20473 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20476 /* Read in a signatured type and build its CU and DIEs.
20477 If the type is a stub for the real type in a DWO file,
20478 read in the real type from the DWO file as well. */
20481 read_signatured_type (struct signatured_type
*sig_type
)
20483 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20485 gdb_assert (per_cu
->is_debug_types
);
20486 gdb_assert (per_cu
->cu
== NULL
);
20488 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20489 read_signatured_type_reader
, NULL
);
20490 sig_type
->per_cu
.tu_read
= 1;
20493 /* Decode simple location descriptions.
20494 Given a pointer to a dwarf block that defines a location, compute
20495 the location and return the value.
20497 NOTE drow/2003-11-18: This function is called in two situations
20498 now: for the address of static or global variables (partial symbols
20499 only) and for offsets into structures which are expected to be
20500 (more or less) constant. The partial symbol case should go away,
20501 and only the constant case should remain. That will let this
20502 function complain more accurately. A few special modes are allowed
20503 without complaint for global variables (for instance, global
20504 register values and thread-local values).
20506 A location description containing no operations indicates that the
20507 object is optimized out. The return value is 0 for that case.
20508 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20509 callers will only want a very basic result and this can become a
20512 Note that stack[0] is unused except as a default error return. */
20515 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20517 struct objfile
*objfile
= cu
->objfile
;
20519 size_t size
= blk
->size
;
20520 const gdb_byte
*data
= blk
->data
;
20521 CORE_ADDR stack
[64];
20523 unsigned int bytes_read
, unsnd
;
20529 stack
[++stacki
] = 0;
20568 stack
[++stacki
] = op
- DW_OP_lit0
;
20603 stack
[++stacki
] = op
- DW_OP_reg0
;
20605 dwarf2_complex_location_expr_complaint ();
20609 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20611 stack
[++stacki
] = unsnd
;
20613 dwarf2_complex_location_expr_complaint ();
20617 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20622 case DW_OP_const1u
:
20623 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20627 case DW_OP_const1s
:
20628 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20632 case DW_OP_const2u
:
20633 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20637 case DW_OP_const2s
:
20638 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20642 case DW_OP_const4u
:
20643 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20647 case DW_OP_const4s
:
20648 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20652 case DW_OP_const8u
:
20653 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20658 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20664 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20669 stack
[stacki
+ 1] = stack
[stacki
];
20674 stack
[stacki
- 1] += stack
[stacki
];
20678 case DW_OP_plus_uconst
:
20679 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20685 stack
[stacki
- 1] -= stack
[stacki
];
20690 /* If we're not the last op, then we definitely can't encode
20691 this using GDB's address_class enum. This is valid for partial
20692 global symbols, although the variable's address will be bogus
20695 dwarf2_complex_location_expr_complaint ();
20698 case DW_OP_GNU_push_tls_address
:
20699 /* The top of the stack has the offset from the beginning
20700 of the thread control block at which the variable is located. */
20701 /* Nothing should follow this operator, so the top of stack would
20703 /* This is valid for partial global symbols, but the variable's
20704 address will be bogus in the psymtab. Make it always at least
20705 non-zero to not look as a variable garbage collected by linker
20706 which have DW_OP_addr 0. */
20708 dwarf2_complex_location_expr_complaint ();
20712 case DW_OP_GNU_uninit
:
20715 case DW_OP_GNU_addr_index
:
20716 case DW_OP_GNU_const_index
:
20717 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20724 const char *name
= get_DW_OP_name (op
);
20727 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20730 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20734 return (stack
[stacki
]);
20737 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20738 outside of the allocated space. Also enforce minimum>0. */
20739 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20741 complaint (&symfile_complaints
,
20742 _("location description stack overflow"));
20748 complaint (&symfile_complaints
,
20749 _("location description stack underflow"));
20753 return (stack
[stacki
]);
20756 /* memory allocation interface */
20758 static struct dwarf_block
*
20759 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20761 struct dwarf_block
*blk
;
20763 blk
= (struct dwarf_block
*)
20764 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20768 static struct die_info
*
20769 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20771 struct die_info
*die
;
20772 size_t size
= sizeof (struct die_info
);
20775 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20777 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20778 memset (die
, 0, sizeof (struct die_info
));
20783 /* Macro support. */
20785 /* Return file name relative to the compilation directory of file number I in
20786 *LH's file name table. The result is allocated using xmalloc; the caller is
20787 responsible for freeing it. */
20790 file_file_name (int file
, struct line_header
*lh
)
20792 /* Is the file number a valid index into the line header's file name
20793 table? Remember that file numbers start with one, not zero. */
20794 if (1 <= file
&& file
<= lh
->num_file_names
)
20796 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20798 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20799 || lh
->include_dirs
== NULL
)
20800 return xstrdup (fe
->name
);
20801 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20806 /* The compiler produced a bogus file number. We can at least
20807 record the macro definitions made in the file, even if we
20808 won't be able to find the file by name. */
20809 char fake_name
[80];
20811 xsnprintf (fake_name
, sizeof (fake_name
),
20812 "<bad macro file number %d>", file
);
20814 complaint (&symfile_complaints
,
20815 _("bad file number in macro information (%d)"),
20818 return xstrdup (fake_name
);
20822 /* Return the full name of file number I in *LH's file name table.
20823 Use COMP_DIR as the name of the current directory of the
20824 compilation. The result is allocated using xmalloc; the caller is
20825 responsible for freeing it. */
20827 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20829 /* Is the file number a valid index into the line header's file name
20830 table? Remember that file numbers start with one, not zero. */
20831 if (1 <= file
&& file
<= lh
->num_file_names
)
20833 char *relative
= file_file_name (file
, lh
);
20835 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20837 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20840 return file_file_name (file
, lh
);
20844 static struct macro_source_file
*
20845 macro_start_file (int file
, int line
,
20846 struct macro_source_file
*current_file
,
20847 struct line_header
*lh
)
20849 /* File name relative to the compilation directory of this source file. */
20850 char *file_name
= file_file_name (file
, lh
);
20852 if (! current_file
)
20854 /* Note: We don't create a macro table for this compilation unit
20855 at all until we actually get a filename. */
20856 struct macro_table
*macro_table
= get_macro_table ();
20858 /* If we have no current file, then this must be the start_file
20859 directive for the compilation unit's main source file. */
20860 current_file
= macro_set_main (macro_table
, file_name
);
20861 macro_define_special (macro_table
);
20864 current_file
= macro_include (current_file
, line
, file_name
);
20868 return current_file
;
20872 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20873 followed by a null byte. */
20875 copy_string (const char *buf
, int len
)
20877 char *s
= xmalloc (len
+ 1);
20879 memcpy (s
, buf
, len
);
20885 static const char *
20886 consume_improper_spaces (const char *p
, const char *body
)
20890 complaint (&symfile_complaints
,
20891 _("macro definition contains spaces "
20892 "in formal argument list:\n`%s'"),
20904 parse_macro_definition (struct macro_source_file
*file
, int line
,
20909 /* The body string takes one of two forms. For object-like macro
20910 definitions, it should be:
20912 <macro name> " " <definition>
20914 For function-like macro definitions, it should be:
20916 <macro name> "() " <definition>
20918 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20920 Spaces may appear only where explicitly indicated, and in the
20923 The Dwarf 2 spec says that an object-like macro's name is always
20924 followed by a space, but versions of GCC around March 2002 omit
20925 the space when the macro's definition is the empty string.
20927 The Dwarf 2 spec says that there should be no spaces between the
20928 formal arguments in a function-like macro's formal argument list,
20929 but versions of GCC around March 2002 include spaces after the
20933 /* Find the extent of the macro name. The macro name is terminated
20934 by either a space or null character (for an object-like macro) or
20935 an opening paren (for a function-like macro). */
20936 for (p
= body
; *p
; p
++)
20937 if (*p
== ' ' || *p
== '(')
20940 if (*p
== ' ' || *p
== '\0')
20942 /* It's an object-like macro. */
20943 int name_len
= p
- body
;
20944 char *name
= copy_string (body
, name_len
);
20945 const char *replacement
;
20948 replacement
= body
+ name_len
+ 1;
20951 dwarf2_macro_malformed_definition_complaint (body
);
20952 replacement
= body
+ name_len
;
20955 macro_define_object (file
, line
, name
, replacement
);
20959 else if (*p
== '(')
20961 /* It's a function-like macro. */
20962 char *name
= copy_string (body
, p
- body
);
20965 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20969 p
= consume_improper_spaces (p
, body
);
20971 /* Parse the formal argument list. */
20972 while (*p
&& *p
!= ')')
20974 /* Find the extent of the current argument name. */
20975 const char *arg_start
= p
;
20977 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20980 if (! *p
|| p
== arg_start
)
20981 dwarf2_macro_malformed_definition_complaint (body
);
20984 /* Make sure argv has room for the new argument. */
20985 if (argc
>= argv_size
)
20988 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20991 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20994 p
= consume_improper_spaces (p
, body
);
20996 /* Consume the comma, if present. */
21001 p
= consume_improper_spaces (p
, body
);
21010 /* Perfectly formed definition, no complaints. */
21011 macro_define_function (file
, line
, name
,
21012 argc
, (const char **) argv
,
21014 else if (*p
== '\0')
21016 /* Complain, but do define it. */
21017 dwarf2_macro_malformed_definition_complaint (body
);
21018 macro_define_function (file
, line
, name
,
21019 argc
, (const char **) argv
,
21023 /* Just complain. */
21024 dwarf2_macro_malformed_definition_complaint (body
);
21027 /* Just complain. */
21028 dwarf2_macro_malformed_definition_complaint (body
);
21034 for (i
= 0; i
< argc
; i
++)
21040 dwarf2_macro_malformed_definition_complaint (body
);
21043 /* Skip some bytes from BYTES according to the form given in FORM.
21044 Returns the new pointer. */
21046 static const gdb_byte
*
21047 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21048 enum dwarf_form form
,
21049 unsigned int offset_size
,
21050 struct dwarf2_section_info
*section
)
21052 unsigned int bytes_read
;
21056 case DW_FORM_data1
:
21061 case DW_FORM_data2
:
21065 case DW_FORM_data4
:
21069 case DW_FORM_data8
:
21073 case DW_FORM_string
:
21074 read_direct_string (abfd
, bytes
, &bytes_read
);
21075 bytes
+= bytes_read
;
21078 case DW_FORM_sec_offset
:
21080 case DW_FORM_GNU_strp_alt
:
21081 bytes
+= offset_size
;
21084 case DW_FORM_block
:
21085 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21086 bytes
+= bytes_read
;
21089 case DW_FORM_block1
:
21090 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21092 case DW_FORM_block2
:
21093 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21095 case DW_FORM_block4
:
21096 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21099 case DW_FORM_sdata
:
21100 case DW_FORM_udata
:
21101 case DW_FORM_GNU_addr_index
:
21102 case DW_FORM_GNU_str_index
:
21103 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21106 dwarf2_section_buffer_overflow_complaint (section
);
21114 complaint (&symfile_complaints
,
21115 _("invalid form 0x%x in `%s'"),
21116 form
, get_section_name (section
));
21124 /* A helper for dwarf_decode_macros that handles skipping an unknown
21125 opcode. Returns an updated pointer to the macro data buffer; or,
21126 on error, issues a complaint and returns NULL. */
21128 static const gdb_byte
*
21129 skip_unknown_opcode (unsigned int opcode
,
21130 const gdb_byte
**opcode_definitions
,
21131 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21133 unsigned int offset_size
,
21134 struct dwarf2_section_info
*section
)
21136 unsigned int bytes_read
, i
;
21138 const gdb_byte
*defn
;
21140 if (opcode_definitions
[opcode
] == NULL
)
21142 complaint (&symfile_complaints
,
21143 _("unrecognized DW_MACFINO opcode 0x%x"),
21148 defn
= opcode_definitions
[opcode
];
21149 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21150 defn
+= bytes_read
;
21152 for (i
= 0; i
< arg
; ++i
)
21154 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
21156 if (mac_ptr
== NULL
)
21158 /* skip_form_bytes already issued the complaint. */
21166 /* A helper function which parses the header of a macro section.
21167 If the macro section is the extended (for now called "GNU") type,
21168 then this updates *OFFSET_SIZE. Returns a pointer to just after
21169 the header, or issues a complaint and returns NULL on error. */
21171 static const gdb_byte
*
21172 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21174 const gdb_byte
*mac_ptr
,
21175 unsigned int *offset_size
,
21176 int section_is_gnu
)
21178 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21180 if (section_is_gnu
)
21182 unsigned int version
, flags
;
21184 version
= read_2_bytes (abfd
, mac_ptr
);
21187 complaint (&symfile_complaints
,
21188 _("unrecognized version `%d' in .debug_macro section"),
21194 flags
= read_1_byte (abfd
, mac_ptr
);
21196 *offset_size
= (flags
& 1) ? 8 : 4;
21198 if ((flags
& 2) != 0)
21199 /* We don't need the line table offset. */
21200 mac_ptr
+= *offset_size
;
21202 /* Vendor opcode descriptions. */
21203 if ((flags
& 4) != 0)
21205 unsigned int i
, count
;
21207 count
= read_1_byte (abfd
, mac_ptr
);
21209 for (i
= 0; i
< count
; ++i
)
21211 unsigned int opcode
, bytes_read
;
21214 opcode
= read_1_byte (abfd
, mac_ptr
);
21216 opcode_definitions
[opcode
] = mac_ptr
;
21217 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21218 mac_ptr
+= bytes_read
;
21227 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21228 including DW_MACRO_GNU_transparent_include. */
21231 dwarf_decode_macro_bytes (bfd
*abfd
,
21232 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21233 struct macro_source_file
*current_file
,
21234 struct line_header
*lh
,
21235 struct dwarf2_section_info
*section
,
21236 int section_is_gnu
, int section_is_dwz
,
21237 unsigned int offset_size
,
21238 htab_t include_hash
)
21240 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21241 enum dwarf_macro_record_type macinfo_type
;
21242 int at_commandline
;
21243 const gdb_byte
*opcode_definitions
[256];
21245 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21246 &offset_size
, section_is_gnu
);
21247 if (mac_ptr
== NULL
)
21249 /* We already issued a complaint. */
21253 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21254 GDB is still reading the definitions from command line. First
21255 DW_MACINFO_start_file will need to be ignored as it was already executed
21256 to create CURRENT_FILE for the main source holding also the command line
21257 definitions. On first met DW_MACINFO_start_file this flag is reset to
21258 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21260 at_commandline
= 1;
21264 /* Do we at least have room for a macinfo type byte? */
21265 if (mac_ptr
>= mac_end
)
21267 dwarf2_section_buffer_overflow_complaint (section
);
21271 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21274 /* Note that we rely on the fact that the corresponding GNU and
21275 DWARF constants are the same. */
21276 switch (macinfo_type
)
21278 /* A zero macinfo type indicates the end of the macro
21283 case DW_MACRO_GNU_define
:
21284 case DW_MACRO_GNU_undef
:
21285 case DW_MACRO_GNU_define_indirect
:
21286 case DW_MACRO_GNU_undef_indirect
:
21287 case DW_MACRO_GNU_define_indirect_alt
:
21288 case DW_MACRO_GNU_undef_indirect_alt
:
21290 unsigned int bytes_read
;
21295 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21296 mac_ptr
+= bytes_read
;
21298 if (macinfo_type
== DW_MACRO_GNU_define
21299 || macinfo_type
== DW_MACRO_GNU_undef
)
21301 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21302 mac_ptr
+= bytes_read
;
21306 LONGEST str_offset
;
21308 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21309 mac_ptr
+= offset_size
;
21311 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21312 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21315 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21317 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21320 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21323 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21324 || macinfo_type
== DW_MACRO_GNU_define_indirect
21325 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21326 if (! current_file
)
21328 /* DWARF violation as no main source is present. */
21329 complaint (&symfile_complaints
,
21330 _("debug info with no main source gives macro %s "
21332 is_define
? _("definition") : _("undefinition"),
21336 if ((line
== 0 && !at_commandline
)
21337 || (line
!= 0 && at_commandline
))
21338 complaint (&symfile_complaints
,
21339 _("debug info gives %s macro %s with %s line %d: %s"),
21340 at_commandline
? _("command-line") : _("in-file"),
21341 is_define
? _("definition") : _("undefinition"),
21342 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21345 parse_macro_definition (current_file
, line
, body
);
21348 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21349 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21350 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21351 macro_undef (current_file
, line
, body
);
21356 case DW_MACRO_GNU_start_file
:
21358 unsigned int bytes_read
;
21361 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21362 mac_ptr
+= bytes_read
;
21363 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21364 mac_ptr
+= bytes_read
;
21366 if ((line
== 0 && !at_commandline
)
21367 || (line
!= 0 && at_commandline
))
21368 complaint (&symfile_complaints
,
21369 _("debug info gives source %d included "
21370 "from %s at %s line %d"),
21371 file
, at_commandline
? _("command-line") : _("file"),
21372 line
== 0 ? _("zero") : _("non-zero"), line
);
21374 if (at_commandline
)
21376 /* This DW_MACRO_GNU_start_file was executed in the
21378 at_commandline
= 0;
21381 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21385 case DW_MACRO_GNU_end_file
:
21386 if (! current_file
)
21387 complaint (&symfile_complaints
,
21388 _("macro debug info has an unmatched "
21389 "`close_file' directive"));
21392 current_file
= current_file
->included_by
;
21393 if (! current_file
)
21395 enum dwarf_macro_record_type next_type
;
21397 /* GCC circa March 2002 doesn't produce the zero
21398 type byte marking the end of the compilation
21399 unit. Complain if it's not there, but exit no
21402 /* Do we at least have room for a macinfo type byte? */
21403 if (mac_ptr
>= mac_end
)
21405 dwarf2_section_buffer_overflow_complaint (section
);
21409 /* We don't increment mac_ptr here, so this is just
21411 next_type
= read_1_byte (abfd
, mac_ptr
);
21412 if (next_type
!= 0)
21413 complaint (&symfile_complaints
,
21414 _("no terminating 0-type entry for "
21415 "macros in `.debug_macinfo' section"));
21422 case DW_MACRO_GNU_transparent_include
:
21423 case DW_MACRO_GNU_transparent_include_alt
:
21427 bfd
*include_bfd
= abfd
;
21428 struct dwarf2_section_info
*include_section
= section
;
21429 struct dwarf2_section_info alt_section
;
21430 const gdb_byte
*include_mac_end
= mac_end
;
21431 int is_dwz
= section_is_dwz
;
21432 const gdb_byte
*new_mac_ptr
;
21434 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21435 mac_ptr
+= offset_size
;
21437 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21439 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21441 dwarf2_read_section (objfile
, &dwz
->macro
);
21443 include_section
= &dwz
->macro
;
21444 include_bfd
= get_section_bfd_owner (include_section
);
21445 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21449 new_mac_ptr
= include_section
->buffer
+ offset
;
21450 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21454 /* This has actually happened; see
21455 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21456 complaint (&symfile_complaints
,
21457 _("recursive DW_MACRO_GNU_transparent_include in "
21458 ".debug_macro section"));
21462 *slot
= (void *) new_mac_ptr
;
21464 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21465 include_mac_end
, current_file
, lh
,
21466 section
, section_is_gnu
, is_dwz
,
21467 offset_size
, include_hash
);
21469 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21474 case DW_MACINFO_vendor_ext
:
21475 if (!section_is_gnu
)
21477 unsigned int bytes_read
;
21480 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21481 mac_ptr
+= bytes_read
;
21482 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21483 mac_ptr
+= bytes_read
;
21485 /* We don't recognize any vendor extensions. */
21491 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21492 mac_ptr
, mac_end
, abfd
, offset_size
,
21494 if (mac_ptr
== NULL
)
21498 } while (macinfo_type
!= 0);
21502 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21503 int section_is_gnu
)
21505 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21506 struct line_header
*lh
= cu
->line_header
;
21508 const gdb_byte
*mac_ptr
, *mac_end
;
21509 struct macro_source_file
*current_file
= 0;
21510 enum dwarf_macro_record_type macinfo_type
;
21511 unsigned int offset_size
= cu
->header
.offset_size
;
21512 const gdb_byte
*opcode_definitions
[256];
21513 struct cleanup
*cleanup
;
21514 htab_t include_hash
;
21516 struct dwarf2_section_info
*section
;
21517 const char *section_name
;
21519 if (cu
->dwo_unit
!= NULL
)
21521 if (section_is_gnu
)
21523 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21524 section_name
= ".debug_macro.dwo";
21528 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21529 section_name
= ".debug_macinfo.dwo";
21534 if (section_is_gnu
)
21536 section
= &dwarf2_per_objfile
->macro
;
21537 section_name
= ".debug_macro";
21541 section
= &dwarf2_per_objfile
->macinfo
;
21542 section_name
= ".debug_macinfo";
21546 dwarf2_read_section (objfile
, section
);
21547 if (section
->buffer
== NULL
)
21549 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21552 abfd
= get_section_bfd_owner (section
);
21554 /* First pass: Find the name of the base filename.
21555 This filename is needed in order to process all macros whose definition
21556 (or undefinition) comes from the command line. These macros are defined
21557 before the first DW_MACINFO_start_file entry, and yet still need to be
21558 associated to the base file.
21560 To determine the base file name, we scan the macro definitions until we
21561 reach the first DW_MACINFO_start_file entry. We then initialize
21562 CURRENT_FILE accordingly so that any macro definition found before the
21563 first DW_MACINFO_start_file can still be associated to the base file. */
21565 mac_ptr
= section
->buffer
+ offset
;
21566 mac_end
= section
->buffer
+ section
->size
;
21568 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21569 &offset_size
, section_is_gnu
);
21570 if (mac_ptr
== NULL
)
21572 /* We already issued a complaint. */
21578 /* Do we at least have room for a macinfo type byte? */
21579 if (mac_ptr
>= mac_end
)
21581 /* Complaint is printed during the second pass as GDB will probably
21582 stop the first pass earlier upon finding
21583 DW_MACINFO_start_file. */
21587 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21590 /* Note that we rely on the fact that the corresponding GNU and
21591 DWARF constants are the same. */
21592 switch (macinfo_type
)
21594 /* A zero macinfo type indicates the end of the macro
21599 case DW_MACRO_GNU_define
:
21600 case DW_MACRO_GNU_undef
:
21601 /* Only skip the data by MAC_PTR. */
21603 unsigned int bytes_read
;
21605 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21606 mac_ptr
+= bytes_read
;
21607 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21608 mac_ptr
+= bytes_read
;
21612 case DW_MACRO_GNU_start_file
:
21614 unsigned int bytes_read
;
21617 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21618 mac_ptr
+= bytes_read
;
21619 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21620 mac_ptr
+= bytes_read
;
21622 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21626 case DW_MACRO_GNU_end_file
:
21627 /* No data to skip by MAC_PTR. */
21630 case DW_MACRO_GNU_define_indirect
:
21631 case DW_MACRO_GNU_undef_indirect
:
21632 case DW_MACRO_GNU_define_indirect_alt
:
21633 case DW_MACRO_GNU_undef_indirect_alt
:
21635 unsigned int bytes_read
;
21637 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21638 mac_ptr
+= bytes_read
;
21639 mac_ptr
+= offset_size
;
21643 case DW_MACRO_GNU_transparent_include
:
21644 case DW_MACRO_GNU_transparent_include_alt
:
21645 /* Note that, according to the spec, a transparent include
21646 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21647 skip this opcode. */
21648 mac_ptr
+= offset_size
;
21651 case DW_MACINFO_vendor_ext
:
21652 /* Only skip the data by MAC_PTR. */
21653 if (!section_is_gnu
)
21655 unsigned int bytes_read
;
21657 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21658 mac_ptr
+= bytes_read
;
21659 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21660 mac_ptr
+= bytes_read
;
21665 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21666 mac_ptr
, mac_end
, abfd
, offset_size
,
21668 if (mac_ptr
== NULL
)
21672 } while (macinfo_type
!= 0 && current_file
== NULL
);
21674 /* Second pass: Process all entries.
21676 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21677 command-line macro definitions/undefinitions. This flag is unset when we
21678 reach the first DW_MACINFO_start_file entry. */
21680 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21681 NULL
, xcalloc
, xfree
);
21682 cleanup
= make_cleanup_htab_delete (include_hash
);
21683 mac_ptr
= section
->buffer
+ offset
;
21684 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21685 *slot
= (void *) mac_ptr
;
21686 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21687 current_file
, lh
, section
,
21688 section_is_gnu
, 0, offset_size
, include_hash
);
21689 do_cleanups (cleanup
);
21692 /* Check if the attribute's form is a DW_FORM_block*
21693 if so return true else false. */
21696 attr_form_is_block (const struct attribute
*attr
)
21698 return (attr
== NULL
? 0 :
21699 attr
->form
== DW_FORM_block1
21700 || attr
->form
== DW_FORM_block2
21701 || attr
->form
== DW_FORM_block4
21702 || attr
->form
== DW_FORM_block
21703 || attr
->form
== DW_FORM_exprloc
);
21706 /* Return non-zero if ATTR's value is a section offset --- classes
21707 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21708 You may use DW_UNSND (attr) to retrieve such offsets.
21710 Section 7.5.4, "Attribute Encodings", explains that no attribute
21711 may have a value that belongs to more than one of these classes; it
21712 would be ambiguous if we did, because we use the same forms for all
21716 attr_form_is_section_offset (const struct attribute
*attr
)
21718 return (attr
->form
== DW_FORM_data4
21719 || attr
->form
== DW_FORM_data8
21720 || attr
->form
== DW_FORM_sec_offset
);
21723 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21724 zero otherwise. When this function returns true, you can apply
21725 dwarf2_get_attr_constant_value to it.
21727 However, note that for some attributes you must check
21728 attr_form_is_section_offset before using this test. DW_FORM_data4
21729 and DW_FORM_data8 are members of both the constant class, and of
21730 the classes that contain offsets into other debug sections
21731 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21732 that, if an attribute's can be either a constant or one of the
21733 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21734 taken as section offsets, not constants. */
21737 attr_form_is_constant (const struct attribute
*attr
)
21739 switch (attr
->form
)
21741 case DW_FORM_sdata
:
21742 case DW_FORM_udata
:
21743 case DW_FORM_data1
:
21744 case DW_FORM_data2
:
21745 case DW_FORM_data4
:
21746 case DW_FORM_data8
:
21754 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21755 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21758 attr_form_is_ref (const struct attribute
*attr
)
21760 switch (attr
->form
)
21762 case DW_FORM_ref_addr
:
21767 case DW_FORM_ref_udata
:
21768 case DW_FORM_GNU_ref_alt
:
21775 /* Return the .debug_loc section to use for CU.
21776 For DWO files use .debug_loc.dwo. */
21778 static struct dwarf2_section_info
*
21779 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21782 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21783 return &dwarf2_per_objfile
->loc
;
21786 /* A helper function that fills in a dwarf2_loclist_baton. */
21789 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21790 struct dwarf2_loclist_baton
*baton
,
21791 const struct attribute
*attr
)
21793 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21795 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21797 baton
->per_cu
= cu
->per_cu
;
21798 gdb_assert (baton
->per_cu
);
21799 /* We don't know how long the location list is, but make sure we
21800 don't run off the edge of the section. */
21801 baton
->size
= section
->size
- DW_UNSND (attr
);
21802 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21803 baton
->base_address
= cu
->base_address
;
21804 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21808 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21809 struct dwarf2_cu
*cu
, int is_block
)
21811 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21812 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21814 if (attr_form_is_section_offset (attr
)
21815 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21816 the section. If so, fall through to the complaint in the
21818 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21820 struct dwarf2_loclist_baton
*baton
;
21822 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21823 sizeof (struct dwarf2_loclist_baton
));
21825 fill_in_loclist_baton (cu
, baton
, attr
);
21827 if (cu
->base_known
== 0)
21828 complaint (&symfile_complaints
,
21829 _("Location list used without "
21830 "specifying the CU base address."));
21832 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21833 ? dwarf2_loclist_block_index
21834 : dwarf2_loclist_index
);
21835 SYMBOL_LOCATION_BATON (sym
) = baton
;
21839 struct dwarf2_locexpr_baton
*baton
;
21841 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21842 sizeof (struct dwarf2_locexpr_baton
));
21843 baton
->per_cu
= cu
->per_cu
;
21844 gdb_assert (baton
->per_cu
);
21846 if (attr_form_is_block (attr
))
21848 /* Note that we're just copying the block's data pointer
21849 here, not the actual data. We're still pointing into the
21850 info_buffer for SYM's objfile; right now we never release
21851 that buffer, but when we do clean up properly this may
21853 baton
->size
= DW_BLOCK (attr
)->size
;
21854 baton
->data
= DW_BLOCK (attr
)->data
;
21858 dwarf2_invalid_attrib_class_complaint ("location description",
21859 SYMBOL_NATURAL_NAME (sym
));
21863 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21864 ? dwarf2_locexpr_block_index
21865 : dwarf2_locexpr_index
);
21866 SYMBOL_LOCATION_BATON (sym
) = baton
;
21870 /* Return the OBJFILE associated with the compilation unit CU. If CU
21871 came from a separate debuginfo file, then the master objfile is
21875 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21877 struct objfile
*objfile
= per_cu
->objfile
;
21879 /* Return the master objfile, so that we can report and look up the
21880 correct file containing this variable. */
21881 if (objfile
->separate_debug_objfile_backlink
)
21882 objfile
= objfile
->separate_debug_objfile_backlink
;
21887 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21888 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21889 CU_HEADERP first. */
21891 static const struct comp_unit_head
*
21892 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21893 struct dwarf2_per_cu_data
*per_cu
)
21895 const gdb_byte
*info_ptr
;
21898 return &per_cu
->cu
->header
;
21900 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21902 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21903 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21908 /* Return the address size given in the compilation unit header for CU. */
21911 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21913 struct comp_unit_head cu_header_local
;
21914 const struct comp_unit_head
*cu_headerp
;
21916 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21918 return cu_headerp
->addr_size
;
21921 /* Return the offset size given in the compilation unit header for CU. */
21924 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21926 struct comp_unit_head cu_header_local
;
21927 const struct comp_unit_head
*cu_headerp
;
21929 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21931 return cu_headerp
->offset_size
;
21934 /* See its dwarf2loc.h declaration. */
21937 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21939 struct comp_unit_head cu_header_local
;
21940 const struct comp_unit_head
*cu_headerp
;
21942 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21944 if (cu_headerp
->version
== 2)
21945 return cu_headerp
->addr_size
;
21947 return cu_headerp
->offset_size
;
21950 /* Return the text offset of the CU. The returned offset comes from
21951 this CU's objfile. If this objfile came from a separate debuginfo
21952 file, then the offset may be different from the corresponding
21953 offset in the parent objfile. */
21956 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21958 struct objfile
*objfile
= per_cu
->objfile
;
21960 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21963 /* Locate the .debug_info compilation unit from CU's objfile which contains
21964 the DIE at OFFSET. Raises an error on failure. */
21966 static struct dwarf2_per_cu_data
*
21967 dwarf2_find_containing_comp_unit (sect_offset offset
,
21968 unsigned int offset_in_dwz
,
21969 struct objfile
*objfile
)
21971 struct dwarf2_per_cu_data
*this_cu
;
21973 const sect_offset
*cu_off
;
21976 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21979 struct dwarf2_per_cu_data
*mid_cu
;
21980 int mid
= low
+ (high
- low
) / 2;
21982 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21983 cu_off
= &mid_cu
->offset
;
21984 if (mid_cu
->is_dwz
> offset_in_dwz
21985 || (mid_cu
->is_dwz
== offset_in_dwz
21986 && cu_off
->sect_off
>= offset
.sect_off
))
21991 gdb_assert (low
== high
);
21992 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21993 cu_off
= &this_cu
->offset
;
21994 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21996 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21997 error (_("Dwarf Error: could not find partial DIE containing "
21998 "offset 0x%lx [in module %s]"),
21999 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22001 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22002 <= offset
.sect_off
);
22003 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22007 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22008 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22009 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22010 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22011 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22016 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22019 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22021 memset (cu
, 0, sizeof (*cu
));
22023 cu
->per_cu
= per_cu
;
22024 cu
->objfile
= per_cu
->objfile
;
22025 obstack_init (&cu
->comp_unit_obstack
);
22028 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22031 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22032 enum language pretend_language
)
22034 struct attribute
*attr
;
22036 /* Set the language we're debugging. */
22037 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22039 set_cu_language (DW_UNSND (attr
), cu
);
22042 cu
->language
= pretend_language
;
22043 cu
->language_defn
= language_def (cu
->language
);
22046 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
22048 cu
->producer
= DW_STRING (attr
);
22051 /* Release one cached compilation unit, CU. We unlink it from the tree
22052 of compilation units, but we don't remove it from the read_in_chain;
22053 the caller is responsible for that.
22054 NOTE: DATA is a void * because this function is also used as a
22055 cleanup routine. */
22058 free_heap_comp_unit (void *data
)
22060 struct dwarf2_cu
*cu
= data
;
22062 gdb_assert (cu
->per_cu
!= NULL
);
22063 cu
->per_cu
->cu
= NULL
;
22066 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22071 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22072 when we're finished with it. We can't free the pointer itself, but be
22073 sure to unlink it from the cache. Also release any associated storage. */
22076 free_stack_comp_unit (void *data
)
22078 struct dwarf2_cu
*cu
= data
;
22080 gdb_assert (cu
->per_cu
!= NULL
);
22081 cu
->per_cu
->cu
= NULL
;
22084 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22085 cu
->partial_dies
= NULL
;
22088 /* Free all cached compilation units. */
22091 free_cached_comp_units (void *data
)
22093 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22095 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22096 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22097 while (per_cu
!= NULL
)
22099 struct dwarf2_per_cu_data
*next_cu
;
22101 next_cu
= per_cu
->cu
->read_in_chain
;
22103 free_heap_comp_unit (per_cu
->cu
);
22104 *last_chain
= next_cu
;
22110 /* Increase the age counter on each cached compilation unit, and free
22111 any that are too old. */
22114 age_cached_comp_units (void)
22116 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22118 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22119 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22120 while (per_cu
!= NULL
)
22122 per_cu
->cu
->last_used
++;
22123 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22124 dwarf2_mark (per_cu
->cu
);
22125 per_cu
= per_cu
->cu
->read_in_chain
;
22128 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22129 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22130 while (per_cu
!= NULL
)
22132 struct dwarf2_per_cu_data
*next_cu
;
22134 next_cu
= per_cu
->cu
->read_in_chain
;
22136 if (!per_cu
->cu
->mark
)
22138 free_heap_comp_unit (per_cu
->cu
);
22139 *last_chain
= next_cu
;
22142 last_chain
= &per_cu
->cu
->read_in_chain
;
22148 /* Remove a single compilation unit from the cache. */
22151 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22153 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22155 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22156 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22157 while (per_cu
!= NULL
)
22159 struct dwarf2_per_cu_data
*next_cu
;
22161 next_cu
= per_cu
->cu
->read_in_chain
;
22163 if (per_cu
== target_per_cu
)
22165 free_heap_comp_unit (per_cu
->cu
);
22167 *last_chain
= next_cu
;
22171 last_chain
= &per_cu
->cu
->read_in_chain
;
22177 /* Release all extra memory associated with OBJFILE. */
22180 dwarf2_free_objfile (struct objfile
*objfile
)
22182 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22184 if (dwarf2_per_objfile
== NULL
)
22187 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22188 free_cached_comp_units (NULL
);
22190 if (dwarf2_per_objfile
->quick_file_names_table
)
22191 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22193 if (dwarf2_per_objfile
->line_header_hash
)
22194 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22196 /* Everything else should be on the objfile obstack. */
22199 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22200 We store these in a hash table separate from the DIEs, and preserve them
22201 when the DIEs are flushed out of cache.
22203 The CU "per_cu" pointer is needed because offset alone is not enough to
22204 uniquely identify the type. A file may have multiple .debug_types sections,
22205 or the type may come from a DWO file. Furthermore, while it's more logical
22206 to use per_cu->section+offset, with Fission the section with the data is in
22207 the DWO file but we don't know that section at the point we need it.
22208 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22209 because we can enter the lookup routine, get_die_type_at_offset, from
22210 outside this file, and thus won't necessarily have PER_CU->cu.
22211 Fortunately, PER_CU is stable for the life of the objfile. */
22213 struct dwarf2_per_cu_offset_and_type
22215 const struct dwarf2_per_cu_data
*per_cu
;
22216 sect_offset offset
;
22220 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22223 per_cu_offset_and_type_hash (const void *item
)
22225 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22227 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22230 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22233 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22235 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22236 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22238 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22239 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22242 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22243 table if necessary. For convenience, return TYPE.
22245 The DIEs reading must have careful ordering to:
22246 * Not cause infite loops trying to read in DIEs as a prerequisite for
22247 reading current DIE.
22248 * Not trying to dereference contents of still incompletely read in types
22249 while reading in other DIEs.
22250 * Enable referencing still incompletely read in types just by a pointer to
22251 the type without accessing its fields.
22253 Therefore caller should follow these rules:
22254 * Try to fetch any prerequisite types we may need to build this DIE type
22255 before building the type and calling set_die_type.
22256 * After building type call set_die_type for current DIE as soon as
22257 possible before fetching more types to complete the current type.
22258 * Make the type as complete as possible before fetching more types. */
22260 static struct type
*
22261 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22263 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22264 struct objfile
*objfile
= cu
->objfile
;
22265 struct attribute
*attr
;
22266 struct dynamic_prop prop
;
22268 /* For Ada types, make sure that the gnat-specific data is always
22269 initialized (if not already set). There are a few types where
22270 we should not be doing so, because the type-specific area is
22271 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22272 where the type-specific area is used to store the floatformat).
22273 But this is not a problem, because the gnat-specific information
22274 is actually not needed for these types. */
22275 if (need_gnat_info (cu
)
22276 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22277 && TYPE_CODE (type
) != TYPE_CODE_FLT
22278 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22279 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22280 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22281 && !HAVE_GNAT_AUX_INFO (type
))
22282 INIT_GNAT_SPECIFIC (type
);
22284 /* Read DW_AT_data_location and set in type. */
22285 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22286 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22287 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22289 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22291 dwarf2_per_objfile
->die_type_hash
=
22292 htab_create_alloc_ex (127,
22293 per_cu_offset_and_type_hash
,
22294 per_cu_offset_and_type_eq
,
22296 &objfile
->objfile_obstack
,
22297 hashtab_obstack_allocate
,
22298 dummy_obstack_deallocate
);
22301 ofs
.per_cu
= cu
->per_cu
;
22302 ofs
.offset
= die
->offset
;
22304 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22305 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22307 complaint (&symfile_complaints
,
22308 _("A problem internal to GDB: DIE 0x%x has type already set"),
22309 die
->offset
.sect_off
);
22310 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22315 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22316 or return NULL if the die does not have a saved type. */
22318 static struct type
*
22319 get_die_type_at_offset (sect_offset offset
,
22320 struct dwarf2_per_cu_data
*per_cu
)
22322 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22324 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22327 ofs
.per_cu
= per_cu
;
22328 ofs
.offset
= offset
;
22329 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22336 /* Look up the type for DIE in CU in die_type_hash,
22337 or return NULL if DIE does not have a saved type. */
22339 static struct type
*
22340 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22342 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22345 /* Add a dependence relationship from CU to REF_PER_CU. */
22348 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22349 struct dwarf2_per_cu_data
*ref_per_cu
)
22353 if (cu
->dependencies
== NULL
)
22355 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22356 NULL
, &cu
->comp_unit_obstack
,
22357 hashtab_obstack_allocate
,
22358 dummy_obstack_deallocate
);
22360 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22362 *slot
= ref_per_cu
;
22365 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22366 Set the mark field in every compilation unit in the
22367 cache that we must keep because we are keeping CU. */
22370 dwarf2_mark_helper (void **slot
, void *data
)
22372 struct dwarf2_per_cu_data
*per_cu
;
22374 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22376 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22377 reading of the chain. As such dependencies remain valid it is not much
22378 useful to track and undo them during QUIT cleanups. */
22379 if (per_cu
->cu
== NULL
)
22382 if (per_cu
->cu
->mark
)
22384 per_cu
->cu
->mark
= 1;
22386 if (per_cu
->cu
->dependencies
!= NULL
)
22387 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22392 /* Set the mark field in CU and in every other compilation unit in the
22393 cache that we must keep because we are keeping CU. */
22396 dwarf2_mark (struct dwarf2_cu
*cu
)
22401 if (cu
->dependencies
!= NULL
)
22402 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22406 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22410 per_cu
->cu
->mark
= 0;
22411 per_cu
= per_cu
->cu
->read_in_chain
;
22415 /* Trivial hash function for partial_die_info: the hash value of a DIE
22416 is its offset in .debug_info for this objfile. */
22419 partial_die_hash (const void *item
)
22421 const struct partial_die_info
*part_die
= item
;
22423 return part_die
->offset
.sect_off
;
22426 /* Trivial comparison function for partial_die_info structures: two DIEs
22427 are equal if they have the same offset. */
22430 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22432 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22433 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22435 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22438 static struct cmd_list_element
*set_dwarf_cmdlist
;
22439 static struct cmd_list_element
*show_dwarf_cmdlist
;
22442 set_dwarf_cmd (char *args
, int from_tty
)
22444 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22449 show_dwarf_cmd (char *args
, int from_tty
)
22451 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22454 /* Free data associated with OBJFILE, if necessary. */
22457 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22459 struct dwarf2_per_objfile
*data
= d
;
22462 /* Make sure we don't accidentally use dwarf2_per_objfile while
22464 dwarf2_per_objfile
= NULL
;
22466 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22467 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22469 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22470 VEC_free (dwarf2_per_cu_ptr
,
22471 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22472 xfree (data
->all_type_units
);
22474 VEC_free (dwarf2_section_info_def
, data
->types
);
22476 if (data
->dwo_files
)
22477 free_dwo_files (data
->dwo_files
, objfile
);
22478 if (data
->dwp_file
)
22479 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22481 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22482 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22486 /* The "save gdb-index" command. */
22488 /* The contents of the hash table we create when building the string
22490 struct strtab_entry
22492 offset_type offset
;
22496 /* Hash function for a strtab_entry.
22498 Function is used only during write_hash_table so no index format backward
22499 compatibility is needed. */
22502 hash_strtab_entry (const void *e
)
22504 const struct strtab_entry
*entry
= e
;
22505 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22508 /* Equality function for a strtab_entry. */
22511 eq_strtab_entry (const void *a
, const void *b
)
22513 const struct strtab_entry
*ea
= a
;
22514 const struct strtab_entry
*eb
= b
;
22515 return !strcmp (ea
->str
, eb
->str
);
22518 /* Create a strtab_entry hash table. */
22521 create_strtab (void)
22523 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22524 xfree
, xcalloc
, xfree
);
22527 /* Add a string to the constant pool. Return the string's offset in
22531 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22534 struct strtab_entry entry
;
22535 struct strtab_entry
*result
;
22538 slot
= htab_find_slot (table
, &entry
, INSERT
);
22543 result
= XNEW (struct strtab_entry
);
22544 result
->offset
= obstack_object_size (cpool
);
22546 obstack_grow_str0 (cpool
, str
);
22549 return result
->offset
;
22552 /* An entry in the symbol table. */
22553 struct symtab_index_entry
22555 /* The name of the symbol. */
22557 /* The offset of the name in the constant pool. */
22558 offset_type index_offset
;
22559 /* A sorted vector of the indices of all the CUs that hold an object
22561 VEC (offset_type
) *cu_indices
;
22564 /* The symbol table. This is a power-of-2-sized hash table. */
22565 struct mapped_symtab
22567 offset_type n_elements
;
22569 struct symtab_index_entry
**data
;
22572 /* Hash function for a symtab_index_entry. */
22575 hash_symtab_entry (const void *e
)
22577 const struct symtab_index_entry
*entry
= e
;
22578 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22579 sizeof (offset_type
) * VEC_length (offset_type
,
22580 entry
->cu_indices
),
22584 /* Equality function for a symtab_index_entry. */
22587 eq_symtab_entry (const void *a
, const void *b
)
22589 const struct symtab_index_entry
*ea
= a
;
22590 const struct symtab_index_entry
*eb
= b
;
22591 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22592 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22594 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22595 VEC_address (offset_type
, eb
->cu_indices
),
22596 sizeof (offset_type
) * len
);
22599 /* Destroy a symtab_index_entry. */
22602 delete_symtab_entry (void *p
)
22604 struct symtab_index_entry
*entry
= p
;
22605 VEC_free (offset_type
, entry
->cu_indices
);
22609 /* Create a hash table holding symtab_index_entry objects. */
22612 create_symbol_hash_table (void)
22614 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22615 delete_symtab_entry
, xcalloc
, xfree
);
22618 /* Create a new mapped symtab object. */
22620 static struct mapped_symtab
*
22621 create_mapped_symtab (void)
22623 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22624 symtab
->n_elements
= 0;
22625 symtab
->size
= 1024;
22626 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22630 /* Destroy a mapped_symtab. */
22633 cleanup_mapped_symtab (void *p
)
22635 struct mapped_symtab
*symtab
= p
;
22636 /* The contents of the array are freed when the other hash table is
22638 xfree (symtab
->data
);
22642 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22645 Function is used only during write_hash_table so no index format backward
22646 compatibility is needed. */
22648 static struct symtab_index_entry
**
22649 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22651 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22653 index
= hash
& (symtab
->size
- 1);
22654 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22658 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22659 return &symtab
->data
[index
];
22660 index
= (index
+ step
) & (symtab
->size
- 1);
22664 /* Expand SYMTAB's hash table. */
22667 hash_expand (struct mapped_symtab
*symtab
)
22669 offset_type old_size
= symtab
->size
;
22671 struct symtab_index_entry
**old_entries
= symtab
->data
;
22674 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22676 for (i
= 0; i
< old_size
; ++i
)
22678 if (old_entries
[i
])
22680 struct symtab_index_entry
**slot
= find_slot (symtab
,
22681 old_entries
[i
]->name
);
22682 *slot
= old_entries
[i
];
22686 xfree (old_entries
);
22689 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22690 CU_INDEX is the index of the CU in which the symbol appears.
22691 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22694 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22695 int is_static
, gdb_index_symbol_kind kind
,
22696 offset_type cu_index
)
22698 struct symtab_index_entry
**slot
;
22699 offset_type cu_index_and_attrs
;
22701 ++symtab
->n_elements
;
22702 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22703 hash_expand (symtab
);
22705 slot
= find_slot (symtab
, name
);
22708 *slot
= XNEW (struct symtab_index_entry
);
22709 (*slot
)->name
= name
;
22710 /* index_offset is set later. */
22711 (*slot
)->cu_indices
= NULL
;
22714 cu_index_and_attrs
= 0;
22715 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22716 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22717 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22719 /* We don't want to record an index value twice as we want to avoid the
22721 We process all global symbols and then all static symbols
22722 (which would allow us to avoid the duplication by only having to check
22723 the last entry pushed), but a symbol could have multiple kinds in one CU.
22724 To keep things simple we don't worry about the duplication here and
22725 sort and uniqufy the list after we've processed all symbols. */
22726 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22729 /* qsort helper routine for uniquify_cu_indices. */
22732 offset_type_compare (const void *ap
, const void *bp
)
22734 offset_type a
= *(offset_type
*) ap
;
22735 offset_type b
= *(offset_type
*) bp
;
22737 return (a
> b
) - (b
> a
);
22740 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22743 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22747 for (i
= 0; i
< symtab
->size
; ++i
)
22749 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22752 && entry
->cu_indices
!= NULL
)
22754 unsigned int next_to_insert
, next_to_check
;
22755 offset_type last_value
;
22757 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22758 VEC_length (offset_type
, entry
->cu_indices
),
22759 sizeof (offset_type
), offset_type_compare
);
22761 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22762 next_to_insert
= 1;
22763 for (next_to_check
= 1;
22764 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22767 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22770 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22772 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22777 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22782 /* Add a vector of indices to the constant pool. */
22785 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22786 struct symtab_index_entry
*entry
)
22790 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22793 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22794 offset_type val
= MAYBE_SWAP (len
);
22799 entry
->index_offset
= obstack_object_size (cpool
);
22801 obstack_grow (cpool
, &val
, sizeof (val
));
22803 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22806 val
= MAYBE_SWAP (iter
);
22807 obstack_grow (cpool
, &val
, sizeof (val
));
22812 struct symtab_index_entry
*old_entry
= *slot
;
22813 entry
->index_offset
= old_entry
->index_offset
;
22816 return entry
->index_offset
;
22819 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22820 constant pool entries going into the obstack CPOOL. */
22823 write_hash_table (struct mapped_symtab
*symtab
,
22824 struct obstack
*output
, struct obstack
*cpool
)
22827 htab_t symbol_hash_table
;
22830 symbol_hash_table
= create_symbol_hash_table ();
22831 str_table
= create_strtab ();
22833 /* We add all the index vectors to the constant pool first, to
22834 ensure alignment is ok. */
22835 for (i
= 0; i
< symtab
->size
; ++i
)
22837 if (symtab
->data
[i
])
22838 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22841 /* Now write out the hash table. */
22842 for (i
= 0; i
< symtab
->size
; ++i
)
22844 offset_type str_off
, vec_off
;
22846 if (symtab
->data
[i
])
22848 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22849 vec_off
= symtab
->data
[i
]->index_offset
;
22853 /* While 0 is a valid constant pool index, it is not valid
22854 to have 0 for both offsets. */
22859 str_off
= MAYBE_SWAP (str_off
);
22860 vec_off
= MAYBE_SWAP (vec_off
);
22862 obstack_grow (output
, &str_off
, sizeof (str_off
));
22863 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22866 htab_delete (str_table
);
22867 htab_delete (symbol_hash_table
);
22870 /* Struct to map psymtab to CU index in the index file. */
22871 struct psymtab_cu_index_map
22873 struct partial_symtab
*psymtab
;
22874 unsigned int cu_index
;
22878 hash_psymtab_cu_index (const void *item
)
22880 const struct psymtab_cu_index_map
*map
= item
;
22882 return htab_hash_pointer (map
->psymtab
);
22886 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22888 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22889 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22891 return lhs
->psymtab
== rhs
->psymtab
;
22894 /* Helper struct for building the address table. */
22895 struct addrmap_index_data
22897 struct objfile
*objfile
;
22898 struct obstack
*addr_obstack
;
22899 htab_t cu_index_htab
;
22901 /* Non-zero if the previous_* fields are valid.
22902 We can't write an entry until we see the next entry (since it is only then
22903 that we know the end of the entry). */
22904 int previous_valid
;
22905 /* Index of the CU in the table of all CUs in the index file. */
22906 unsigned int previous_cu_index
;
22907 /* Start address of the CU. */
22908 CORE_ADDR previous_cu_start
;
22911 /* Write an address entry to OBSTACK. */
22914 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22915 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22917 offset_type cu_index_to_write
;
22919 CORE_ADDR baseaddr
;
22921 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22923 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22924 obstack_grow (obstack
, addr
, 8);
22925 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22926 obstack_grow (obstack
, addr
, 8);
22927 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22928 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22931 /* Worker function for traversing an addrmap to build the address table. */
22934 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22936 struct addrmap_index_data
*data
= datap
;
22937 struct partial_symtab
*pst
= obj
;
22939 if (data
->previous_valid
)
22940 add_address_entry (data
->objfile
, data
->addr_obstack
,
22941 data
->previous_cu_start
, start_addr
,
22942 data
->previous_cu_index
);
22944 data
->previous_cu_start
= start_addr
;
22947 struct psymtab_cu_index_map find_map
, *map
;
22948 find_map
.psymtab
= pst
;
22949 map
= htab_find (data
->cu_index_htab
, &find_map
);
22950 gdb_assert (map
!= NULL
);
22951 data
->previous_cu_index
= map
->cu_index
;
22952 data
->previous_valid
= 1;
22955 data
->previous_valid
= 0;
22960 /* Write OBJFILE's address map to OBSTACK.
22961 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22962 in the index file. */
22965 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22966 htab_t cu_index_htab
)
22968 struct addrmap_index_data addrmap_index_data
;
22970 /* When writing the address table, we have to cope with the fact that
22971 the addrmap iterator only provides the start of a region; we have to
22972 wait until the next invocation to get the start of the next region. */
22974 addrmap_index_data
.objfile
= objfile
;
22975 addrmap_index_data
.addr_obstack
= obstack
;
22976 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22977 addrmap_index_data
.previous_valid
= 0;
22979 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22980 &addrmap_index_data
);
22982 /* It's highly unlikely the last entry (end address = 0xff...ff)
22983 is valid, but we should still handle it.
22984 The end address is recorded as the start of the next region, but that
22985 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22987 if (addrmap_index_data
.previous_valid
)
22988 add_address_entry (objfile
, obstack
,
22989 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22990 addrmap_index_data
.previous_cu_index
);
22993 /* Return the symbol kind of PSYM. */
22995 static gdb_index_symbol_kind
22996 symbol_kind (struct partial_symbol
*psym
)
22998 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22999 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23007 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23009 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23011 case LOC_CONST_BYTES
:
23012 case LOC_OPTIMIZED_OUT
:
23014 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23016 /* Note: It's currently impossible to recognize psyms as enum values
23017 short of reading the type info. For now punt. */
23018 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23020 /* There are other LOC_FOO values that one might want to classify
23021 as variables, but dwarf2read.c doesn't currently use them. */
23022 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23024 case STRUCT_DOMAIN
:
23025 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23027 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23031 /* Add a list of partial symbols to SYMTAB. */
23034 write_psymbols (struct mapped_symtab
*symtab
,
23036 struct partial_symbol
**psymp
,
23038 offset_type cu_index
,
23041 for (; count
-- > 0; ++psymp
)
23043 struct partial_symbol
*psym
= *psymp
;
23046 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23047 error (_("Ada is not currently supported by the index"));
23049 /* Only add a given psymbol once. */
23050 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23053 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23056 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23057 is_static
, kind
, cu_index
);
23062 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23063 exception if there is an error. */
23066 write_obstack (FILE *file
, struct obstack
*obstack
)
23068 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23070 != obstack_object_size (obstack
))
23071 error (_("couldn't data write to file"));
23074 /* Unlink a file if the argument is not NULL. */
23077 unlink_if_set (void *p
)
23079 char **filename
= p
;
23081 unlink (*filename
);
23084 /* A helper struct used when iterating over debug_types. */
23085 struct signatured_type_index_data
23087 struct objfile
*objfile
;
23088 struct mapped_symtab
*symtab
;
23089 struct obstack
*types_list
;
23094 /* A helper function that writes a single signatured_type to an
23098 write_one_signatured_type (void **slot
, void *d
)
23100 struct signatured_type_index_data
*info
= d
;
23101 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23102 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23105 write_psymbols (info
->symtab
,
23107 info
->objfile
->global_psymbols
.list
23108 + psymtab
->globals_offset
,
23109 psymtab
->n_global_syms
, info
->cu_index
,
23111 write_psymbols (info
->symtab
,
23113 info
->objfile
->static_psymbols
.list
23114 + psymtab
->statics_offset
,
23115 psymtab
->n_static_syms
, info
->cu_index
,
23118 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23119 entry
->per_cu
.offset
.sect_off
);
23120 obstack_grow (info
->types_list
, val
, 8);
23121 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23122 entry
->type_offset_in_tu
.cu_off
);
23123 obstack_grow (info
->types_list
, val
, 8);
23124 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23125 obstack_grow (info
->types_list
, val
, 8);
23132 /* Recurse into all "included" dependencies and write their symbols as
23133 if they appeared in this psymtab. */
23136 recursively_write_psymbols (struct objfile
*objfile
,
23137 struct partial_symtab
*psymtab
,
23138 struct mapped_symtab
*symtab
,
23140 offset_type cu_index
)
23144 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23145 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23146 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23147 symtab
, psyms_seen
, cu_index
);
23149 write_psymbols (symtab
,
23151 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23152 psymtab
->n_global_syms
, cu_index
,
23154 write_psymbols (symtab
,
23156 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23157 psymtab
->n_static_syms
, cu_index
,
23161 /* Create an index file for OBJFILE in the directory DIR. */
23164 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23166 struct cleanup
*cleanup
;
23167 char *filename
, *cleanup_filename
;
23168 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23169 struct obstack cu_list
, types_cu_list
;
23172 struct mapped_symtab
*symtab
;
23173 offset_type val
, size_of_contents
, total_len
;
23176 htab_t cu_index_htab
;
23177 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23179 if (dwarf2_per_objfile
->using_index
)
23180 error (_("Cannot use an index to create the index"));
23182 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23183 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23185 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23188 if (stat (objfile_name (objfile
), &st
) < 0)
23189 perror_with_name (objfile_name (objfile
));
23191 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23192 INDEX_SUFFIX
, (char *) NULL
);
23193 cleanup
= make_cleanup (xfree
, filename
);
23195 out_file
= gdb_fopen_cloexec (filename
, "wb");
23197 error (_("Can't open `%s' for writing"), filename
);
23199 cleanup_filename
= filename
;
23200 make_cleanup (unlink_if_set
, &cleanup_filename
);
23202 symtab
= create_mapped_symtab ();
23203 make_cleanup (cleanup_mapped_symtab
, symtab
);
23205 obstack_init (&addr_obstack
);
23206 make_cleanup_obstack_free (&addr_obstack
);
23208 obstack_init (&cu_list
);
23209 make_cleanup_obstack_free (&cu_list
);
23211 obstack_init (&types_cu_list
);
23212 make_cleanup_obstack_free (&types_cu_list
);
23214 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23215 NULL
, xcalloc
, xfree
);
23216 make_cleanup_htab_delete (psyms_seen
);
23218 /* While we're scanning CU's create a table that maps a psymtab pointer
23219 (which is what addrmap records) to its index (which is what is recorded
23220 in the index file). This will later be needed to write the address
23222 cu_index_htab
= htab_create_alloc (100,
23223 hash_psymtab_cu_index
,
23224 eq_psymtab_cu_index
,
23225 NULL
, xcalloc
, xfree
);
23226 make_cleanup_htab_delete (cu_index_htab
);
23227 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
23228 xmalloc (sizeof (struct psymtab_cu_index_map
)
23229 * dwarf2_per_objfile
->n_comp_units
);
23230 make_cleanup (xfree
, psymtab_cu_index_map
);
23232 /* The CU list is already sorted, so we don't need to do additional
23233 work here. Also, the debug_types entries do not appear in
23234 all_comp_units, but only in their own hash table. */
23235 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23237 struct dwarf2_per_cu_data
*per_cu
23238 = dwarf2_per_objfile
->all_comp_units
[i
];
23239 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23241 struct psymtab_cu_index_map
*map
;
23244 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23245 It may be referenced from a local scope but in such case it does not
23246 need to be present in .gdb_index. */
23247 if (psymtab
== NULL
)
23250 if (psymtab
->user
== NULL
)
23251 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23253 map
= &psymtab_cu_index_map
[i
];
23254 map
->psymtab
= psymtab
;
23256 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23257 gdb_assert (slot
!= NULL
);
23258 gdb_assert (*slot
== NULL
);
23261 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23262 per_cu
->offset
.sect_off
);
23263 obstack_grow (&cu_list
, val
, 8);
23264 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23265 obstack_grow (&cu_list
, val
, 8);
23268 /* Dump the address map. */
23269 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23271 /* Write out the .debug_type entries, if any. */
23272 if (dwarf2_per_objfile
->signatured_types
)
23274 struct signatured_type_index_data sig_data
;
23276 sig_data
.objfile
= objfile
;
23277 sig_data
.symtab
= symtab
;
23278 sig_data
.types_list
= &types_cu_list
;
23279 sig_data
.psyms_seen
= psyms_seen
;
23280 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23281 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23282 write_one_signatured_type
, &sig_data
);
23285 /* Now that we've processed all symbols we can shrink their cu_indices
23287 uniquify_cu_indices (symtab
);
23289 obstack_init (&constant_pool
);
23290 make_cleanup_obstack_free (&constant_pool
);
23291 obstack_init (&symtab_obstack
);
23292 make_cleanup_obstack_free (&symtab_obstack
);
23293 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23295 obstack_init (&contents
);
23296 make_cleanup_obstack_free (&contents
);
23297 size_of_contents
= 6 * sizeof (offset_type
);
23298 total_len
= size_of_contents
;
23300 /* The version number. */
23301 val
= MAYBE_SWAP (8);
23302 obstack_grow (&contents
, &val
, sizeof (val
));
23304 /* The offset of the CU list from the start of the file. */
23305 val
= MAYBE_SWAP (total_len
);
23306 obstack_grow (&contents
, &val
, sizeof (val
));
23307 total_len
+= obstack_object_size (&cu_list
);
23309 /* The offset of the types CU list from the start of the file. */
23310 val
= MAYBE_SWAP (total_len
);
23311 obstack_grow (&contents
, &val
, sizeof (val
));
23312 total_len
+= obstack_object_size (&types_cu_list
);
23314 /* The offset of the address table from the start of the file. */
23315 val
= MAYBE_SWAP (total_len
);
23316 obstack_grow (&contents
, &val
, sizeof (val
));
23317 total_len
+= obstack_object_size (&addr_obstack
);
23319 /* The offset of the symbol table from the start of the file. */
23320 val
= MAYBE_SWAP (total_len
);
23321 obstack_grow (&contents
, &val
, sizeof (val
));
23322 total_len
+= obstack_object_size (&symtab_obstack
);
23324 /* The offset of the constant pool from the start of the file. */
23325 val
= MAYBE_SWAP (total_len
);
23326 obstack_grow (&contents
, &val
, sizeof (val
));
23327 total_len
+= obstack_object_size (&constant_pool
);
23329 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23331 write_obstack (out_file
, &contents
);
23332 write_obstack (out_file
, &cu_list
);
23333 write_obstack (out_file
, &types_cu_list
);
23334 write_obstack (out_file
, &addr_obstack
);
23335 write_obstack (out_file
, &symtab_obstack
);
23336 write_obstack (out_file
, &constant_pool
);
23340 /* We want to keep the file, so we set cleanup_filename to NULL
23341 here. See unlink_if_set. */
23342 cleanup_filename
= NULL
;
23344 do_cleanups (cleanup
);
23347 /* Implementation of the `save gdb-index' command.
23349 Note that the file format used by this command is documented in the
23350 GDB manual. Any changes here must be documented there. */
23353 save_gdb_index_command (char *arg
, int from_tty
)
23355 struct objfile
*objfile
;
23358 error (_("usage: save gdb-index DIRECTORY"));
23360 ALL_OBJFILES (objfile
)
23364 /* If the objfile does not correspond to an actual file, skip it. */
23365 if (stat (objfile_name (objfile
), &st
) < 0)
23368 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23369 if (dwarf2_per_objfile
)
23374 write_psymtabs_to_index (objfile
, arg
);
23376 CATCH (except
, RETURN_MASK_ERROR
)
23378 exception_fprintf (gdb_stderr
, except
,
23379 _("Error while writing index for `%s': "),
23380 objfile_name (objfile
));
23389 int dwarf_always_disassemble
;
23392 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23393 struct cmd_list_element
*c
, const char *value
)
23395 fprintf_filtered (file
,
23396 _("Whether to always disassemble "
23397 "DWARF expressions is %s.\n"),
23402 show_check_physname (struct ui_file
*file
, int from_tty
,
23403 struct cmd_list_element
*c
, const char *value
)
23405 fprintf_filtered (file
,
23406 _("Whether to check \"physname\" is %s.\n"),
23410 void _initialize_dwarf2_read (void);
23413 _initialize_dwarf2_read (void)
23415 struct cmd_list_element
*c
;
23417 dwarf2_objfile_data_key
23418 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23420 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23421 Set DWARF specific variables.\n\
23422 Configure DWARF variables such as the cache size"),
23423 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23424 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23426 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23427 Show DWARF specific variables\n\
23428 Show DWARF variables such as the cache size"),
23429 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23430 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23432 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23433 &dwarf_max_cache_age
, _("\
23434 Set the upper bound on the age of cached DWARF compilation units."), _("\
23435 Show the upper bound on the age of cached DWARF compilation units."), _("\
23436 A higher limit means that cached compilation units will be stored\n\
23437 in memory longer, and more total memory will be used. Zero disables\n\
23438 caching, which can slow down startup."),
23440 show_dwarf_max_cache_age
,
23441 &set_dwarf_cmdlist
,
23442 &show_dwarf_cmdlist
);
23444 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23445 &dwarf_always_disassemble
, _("\
23446 Set whether `info address' always disassembles DWARF expressions."), _("\
23447 Show whether `info address' always disassembles DWARF expressions."), _("\
23448 When enabled, DWARF expressions are always printed in an assembly-like\n\
23449 syntax. When disabled, expressions will be printed in a more\n\
23450 conversational style, when possible."),
23452 show_dwarf_always_disassemble
,
23453 &set_dwarf_cmdlist
,
23454 &show_dwarf_cmdlist
);
23456 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23457 Set debugging of the DWARF reader."), _("\
23458 Show debugging of the DWARF reader."), _("\
23459 When enabled (non-zero), debugging messages are printed during DWARF\n\
23460 reading and symtab expansion. A value of 1 (one) provides basic\n\
23461 information. A value greater than 1 provides more verbose information."),
23464 &setdebuglist
, &showdebuglist
);
23466 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23467 Set debugging of the DWARF DIE reader."), _("\
23468 Show debugging of the DWARF DIE reader."), _("\
23469 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23470 The value is the maximum depth to print."),
23473 &setdebuglist
, &showdebuglist
);
23475 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23476 Set debugging of the dwarf line reader."), _("\
23477 Show debugging of the dwarf line reader."), _("\
23478 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23479 A value of 1 (one) provides basic information.\n\
23480 A value greater than 1 provides more verbose information."),
23483 &setdebuglist
, &showdebuglist
);
23485 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23486 Set cross-checking of \"physname\" code against demangler."), _("\
23487 Show cross-checking of \"physname\" code against demangler."), _("\
23488 When enabled, GDB's internal \"physname\" code is checked against\n\
23490 NULL
, show_check_physname
,
23491 &setdebuglist
, &showdebuglist
);
23493 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23494 no_class
, &use_deprecated_index_sections
, _("\
23495 Set whether to use deprecated gdb_index sections."), _("\
23496 Show whether to use deprecated gdb_index sections."), _("\
23497 When enabled, deprecated .gdb_index sections are used anyway.\n\
23498 Normally they are ignored either because of a missing feature or\n\
23499 performance issue.\n\
23500 Warning: This option must be enabled before gdb reads the file."),
23503 &setlist
, &showlist
);
23505 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23507 Save a gdb-index file.\n\
23508 Usage: save gdb-index DIRECTORY"),
23510 set_cmd_completer (c
, filename_completer
);
23512 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23513 &dwarf2_locexpr_funcs
);
23514 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23515 &dwarf2_loclist_funcs
);
23517 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23518 &dwarf2_block_frame_base_locexpr_funcs
);
23519 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23520 &dwarf2_block_frame_base_loclist_funcs
);