1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2015 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
70 #include "filestuff.h"
74 #include <sys/types.h>
76 typedef struct symbol
*symbolp
;
79 /* When == 1, print basic high level tracing messages.
80 When > 1, be more verbose.
81 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
82 static unsigned int dwarf2_read_debug
= 0;
84 /* When non-zero, dump DIEs after they are read in. */
85 static unsigned int dwarf2_die_debug
= 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname
= 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 static int use_deprecated_index_sections
= 0;
93 static const struct objfile_data
*dwarf2_objfile_data_key
;
95 /* The "aclass" indices for various kinds of computed DWARF symbols. */
97 static int dwarf2_locexpr_index
;
98 static int dwarf2_loclist_index
;
99 static int dwarf2_locexpr_block_index
;
100 static int dwarf2_loclist_block_index
;
102 /* A descriptor for dwarf sections.
104 S.ASECTION, SIZE are typically initialized when the objfile is first
105 scanned. BUFFER, READIN are filled in later when the section is read.
106 If the section contained compressed data then SIZE is updated to record
107 the uncompressed size of the section.
109 DWP file format V2 introduces a wrinkle that is easiest to handle by
110 creating the concept of virtual sections contained within a real section.
111 In DWP V2 the sections of the input DWO files are concatenated together
112 into one section, but section offsets are kept relative to the original
114 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
115 the real section this "virtual" section is contained in, and BUFFER,SIZE
116 describe the virtual section. */
118 struct dwarf2_section_info
122 /* If this is a real section, the bfd section. */
124 /* If this is a virtual section, pointer to the containing ("real")
126 struct dwarf2_section_info
*containing_section
;
128 /* Pointer to section data, only valid if readin. */
129 const gdb_byte
*buffer
;
130 /* The size of the section, real or virtual. */
132 /* If this is a virtual section, the offset in the real section.
133 Only valid if is_virtual. */
134 bfd_size_type virtual_offset
;
135 /* True if we have tried to read this section. */
137 /* True if this is a virtual section, False otherwise.
138 This specifies which of s.asection and s.containing_section to use. */
142 typedef struct dwarf2_section_info dwarf2_section_info_def
;
143 DEF_VEC_O (dwarf2_section_info_def
);
145 /* All offsets in the index are of this type. It must be
146 architecture-independent. */
147 typedef uint32_t offset_type
;
149 DEF_VEC_I (offset_type
);
151 /* Ensure only legit values are used. */
152 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
154 gdb_assert ((unsigned int) (value) <= 1); \
155 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
158 /* Ensure only legit values are used. */
159 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
161 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
162 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
163 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
166 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
167 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
169 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
170 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
173 /* A description of the mapped index. The file format is described in
174 a comment by the code that writes the index. */
177 /* Index data format version. */
180 /* The total length of the buffer. */
183 /* A pointer to the address table data. */
184 const gdb_byte
*address_table
;
186 /* Size of the address table data in bytes. */
187 offset_type address_table_size
;
189 /* The symbol table, implemented as a hash table. */
190 const offset_type
*symbol_table
;
192 /* Size in slots, each slot is 2 offset_types. */
193 offset_type symbol_table_slots
;
195 /* A pointer to the constant pool. */
196 const char *constant_pool
;
199 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
200 DEF_VEC_P (dwarf2_per_cu_ptr
);
202 /* Collection of data recorded per objfile.
203 This hangs off of dwarf2_objfile_data_key. */
205 struct dwarf2_per_objfile
207 struct dwarf2_section_info info
;
208 struct dwarf2_section_info abbrev
;
209 struct dwarf2_section_info line
;
210 struct dwarf2_section_info loc
;
211 struct dwarf2_section_info macinfo
;
212 struct dwarf2_section_info macro
;
213 struct dwarf2_section_info str
;
214 struct dwarf2_section_info ranges
;
215 struct dwarf2_section_info addr
;
216 struct dwarf2_section_info frame
;
217 struct dwarf2_section_info eh_frame
;
218 struct dwarf2_section_info gdb_index
;
220 VEC (dwarf2_section_info_def
) *types
;
223 struct objfile
*objfile
;
225 /* Table of all the compilation units. This is used to locate
226 the target compilation unit of a particular reference. */
227 struct dwarf2_per_cu_data
**all_comp_units
;
229 /* The number of compilation units in ALL_COMP_UNITS. */
232 /* The number of .debug_types-related CUs. */
235 /* The number of elements allocated in all_type_units.
236 If there are skeleton-less TUs, we add them to all_type_units lazily. */
237 int n_allocated_type_units
;
239 /* The .debug_types-related CUs (TUs).
240 This is stored in malloc space because we may realloc it. */
241 struct signatured_type
**all_type_units
;
243 /* Table of struct type_unit_group objects.
244 The hash key is the DW_AT_stmt_list value. */
245 htab_t type_unit_groups
;
247 /* A table mapping .debug_types signatures to its signatured_type entry.
248 This is NULL if the .debug_types section hasn't been read in yet. */
249 htab_t signatured_types
;
251 /* Type unit statistics, to see how well the scaling improvements
255 int nr_uniq_abbrev_tables
;
257 int nr_symtab_sharers
;
258 int nr_stmt_less_type_units
;
259 int nr_all_type_units_reallocs
;
262 /* A chain of compilation units that are currently read in, so that
263 they can be freed later. */
264 struct dwarf2_per_cu_data
*read_in_chain
;
266 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
267 This is NULL if the table hasn't been allocated yet. */
270 /* Non-zero if we've check for whether there is a DWP file. */
273 /* The DWP file if there is one, or NULL. */
274 struct dwp_file
*dwp_file
;
276 /* The shared '.dwz' file, if one exists. This is used when the
277 original data was compressed using 'dwz -m'. */
278 struct dwz_file
*dwz_file
;
280 /* A flag indicating wether this objfile has a section loaded at a
282 int has_section_at_zero
;
284 /* True if we are using the mapped index,
285 or we are faking it for OBJF_READNOW's sake. */
286 unsigned char using_index
;
288 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
289 struct mapped_index
*index_table
;
291 /* When using index_table, this keeps track of all quick_file_names entries.
292 TUs typically share line table entries with a CU, so we maintain a
293 separate table of all line table entries to support the sharing.
294 Note that while there can be way more TUs than CUs, we've already
295 sorted all the TUs into "type unit groups", grouped by their
296 DW_AT_stmt_list value. Therefore the only sharing done here is with a
297 CU and its associated TU group if there is one. */
298 htab_t quick_file_names_table
;
300 /* Set during partial symbol reading, to prevent queueing of full
302 int reading_partial_symbols
;
304 /* Table mapping type DIEs to their struct type *.
305 This is NULL if not allocated yet.
306 The mapping is done via (CU/TU + DIE offset) -> type. */
307 htab_t die_type_hash
;
309 /* The CUs we recently read. */
310 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
313 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
315 /* Default names of the debugging sections. */
317 /* Note that if the debugging section has been compressed, it might
318 have a name like .zdebug_info. */
320 static const struct dwarf2_debug_sections dwarf2_elf_names
=
322 { ".debug_info", ".zdebug_info" },
323 { ".debug_abbrev", ".zdebug_abbrev" },
324 { ".debug_line", ".zdebug_line" },
325 { ".debug_loc", ".zdebug_loc" },
326 { ".debug_macinfo", ".zdebug_macinfo" },
327 { ".debug_macro", ".zdebug_macro" },
328 { ".debug_str", ".zdebug_str" },
329 { ".debug_ranges", ".zdebug_ranges" },
330 { ".debug_types", ".zdebug_types" },
331 { ".debug_addr", ".zdebug_addr" },
332 { ".debug_frame", ".zdebug_frame" },
333 { ".eh_frame", NULL
},
334 { ".gdb_index", ".zgdb_index" },
338 /* List of DWO/DWP sections. */
340 static const struct dwop_section_names
342 struct dwarf2_section_names abbrev_dwo
;
343 struct dwarf2_section_names info_dwo
;
344 struct dwarf2_section_names line_dwo
;
345 struct dwarf2_section_names loc_dwo
;
346 struct dwarf2_section_names macinfo_dwo
;
347 struct dwarf2_section_names macro_dwo
;
348 struct dwarf2_section_names str_dwo
;
349 struct dwarf2_section_names str_offsets_dwo
;
350 struct dwarf2_section_names types_dwo
;
351 struct dwarf2_section_names cu_index
;
352 struct dwarf2_section_names tu_index
;
356 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
357 { ".debug_info.dwo", ".zdebug_info.dwo" },
358 { ".debug_line.dwo", ".zdebug_line.dwo" },
359 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
360 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
361 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
362 { ".debug_str.dwo", ".zdebug_str.dwo" },
363 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
364 { ".debug_types.dwo", ".zdebug_types.dwo" },
365 { ".debug_cu_index", ".zdebug_cu_index" },
366 { ".debug_tu_index", ".zdebug_tu_index" },
369 /* local data types */
371 /* The data in a compilation unit header, after target2host
372 translation, looks like this. */
373 struct comp_unit_head
377 unsigned char addr_size
;
378 unsigned char signed_addr_p
;
379 sect_offset abbrev_offset
;
381 /* Size of file offsets; either 4 or 8. */
382 unsigned int offset_size
;
384 /* Size of the length field; either 4 or 12. */
385 unsigned int initial_length_size
;
387 /* Offset to the first byte of this compilation unit header in the
388 .debug_info section, for resolving relative reference dies. */
391 /* Offset to first die in this cu from the start of the cu.
392 This will be the first byte following the compilation unit header. */
393 cu_offset first_die_offset
;
396 /* Type used for delaying computation of method physnames.
397 See comments for compute_delayed_physnames. */
398 struct delayed_method_info
400 /* The type to which the method is attached, i.e., its parent class. */
403 /* The index of the method in the type's function fieldlists. */
406 /* The index of the method in the fieldlist. */
409 /* The name of the DIE. */
412 /* The DIE associated with this method. */
413 struct die_info
*die
;
416 typedef struct delayed_method_info delayed_method_info
;
417 DEF_VEC_O (delayed_method_info
);
419 /* Internal state when decoding a particular compilation unit. */
422 /* The objfile containing this compilation unit. */
423 struct objfile
*objfile
;
425 /* The header of the compilation unit. */
426 struct comp_unit_head header
;
428 /* Base address of this compilation unit. */
429 CORE_ADDR base_address
;
431 /* Non-zero if base_address has been set. */
434 /* The language we are debugging. */
435 enum language language
;
436 const struct language_defn
*language_defn
;
438 const char *producer
;
440 /* The generic symbol table building routines have separate lists for
441 file scope symbols and all all other scopes (local scopes). So
442 we need to select the right one to pass to add_symbol_to_list().
443 We do it by keeping a pointer to the correct list in list_in_scope.
445 FIXME: The original dwarf code just treated the file scope as the
446 first local scope, and all other local scopes as nested local
447 scopes, and worked fine. Check to see if we really need to
448 distinguish these in buildsym.c. */
449 struct pending
**list_in_scope
;
451 /* The abbrev table for this CU.
452 Normally this points to the abbrev table in the objfile.
453 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
454 struct abbrev_table
*abbrev_table
;
456 /* Hash table holding all the loaded partial DIEs
457 with partial_die->offset.SECT_OFF as hash. */
460 /* Storage for things with the same lifetime as this read-in compilation
461 unit, including partial DIEs. */
462 struct obstack comp_unit_obstack
;
464 /* When multiple dwarf2_cu structures are living in memory, this field
465 chains them all together, so that they can be released efficiently.
466 We will probably also want a generation counter so that most-recently-used
467 compilation units are cached... */
468 struct dwarf2_per_cu_data
*read_in_chain
;
470 /* Backlink to our per_cu entry. */
471 struct dwarf2_per_cu_data
*per_cu
;
473 /* How many compilation units ago was this CU last referenced? */
476 /* A hash table of DIE cu_offset for following references with
477 die_info->offset.sect_off as hash. */
480 /* Full DIEs if read in. */
481 struct die_info
*dies
;
483 /* A set of pointers to dwarf2_per_cu_data objects for compilation
484 units referenced by this one. Only set during full symbol processing;
485 partial symbol tables do not have dependencies. */
488 /* Header data from the line table, during full symbol processing. */
489 struct line_header
*line_header
;
491 /* A list of methods which need to have physnames computed
492 after all type information has been read. */
493 VEC (delayed_method_info
) *method_list
;
495 /* To be copied to symtab->call_site_htab. */
496 htab_t call_site_htab
;
498 /* Non-NULL if this CU came from a DWO file.
499 There is an invariant here that is important to remember:
500 Except for attributes copied from the top level DIE in the "main"
501 (or "stub") file in preparation for reading the DWO file
502 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
503 Either there isn't a DWO file (in which case this is NULL and the point
504 is moot), or there is and either we're not going to read it (in which
505 case this is NULL) or there is and we are reading it (in which case this
507 struct dwo_unit
*dwo_unit
;
509 /* The DW_AT_addr_base attribute if present, zero otherwise
510 (zero is a valid value though).
511 Note this value comes from the Fission stub CU/TU's DIE. */
514 /* The DW_AT_ranges_base attribute if present, zero otherwise
515 (zero is a valid value though).
516 Note this value comes from the Fission stub CU/TU's DIE.
517 Also note that the value is zero in the non-DWO case so this value can
518 be used without needing to know whether DWO files are in use or not.
519 N.B. This does not apply to DW_AT_ranges appearing in
520 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
521 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
522 DW_AT_ranges_base *would* have to be applied, and we'd have to care
523 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
524 ULONGEST ranges_base
;
526 /* Mark used when releasing cached dies. */
527 unsigned int mark
: 1;
529 /* This CU references .debug_loc. See the symtab->locations_valid field.
530 This test is imperfect as there may exist optimized debug code not using
531 any location list and still facing inlining issues if handled as
532 unoptimized code. For a future better test see GCC PR other/32998. */
533 unsigned int has_loclist
: 1;
535 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
536 if all the producer_is_* fields are valid. This information is cached
537 because profiling CU expansion showed excessive time spent in
538 producer_is_gxx_lt_4_6. */
539 unsigned int checked_producer
: 1;
540 unsigned int producer_is_gxx_lt_4_6
: 1;
541 unsigned int producer_is_gcc_lt_4_3
: 1;
542 unsigned int producer_is_icc
: 1;
544 /* When set, the file that we're processing is known to have
545 debugging info for C++ namespaces. GCC 3.3.x did not produce
546 this information, but later versions do. */
548 unsigned int processing_has_namespace_info
: 1;
551 /* Persistent data held for a compilation unit, even when not
552 processing it. We put a pointer to this structure in the
553 read_symtab_private field of the psymtab. */
555 struct dwarf2_per_cu_data
557 /* The start offset and length of this compilation unit.
558 NOTE: Unlike comp_unit_head.length, this length includes
560 If the DIE refers to a DWO file, this is always of the original die,
565 /* Flag indicating this compilation unit will be read in before
566 any of the current compilation units are processed. */
567 unsigned int queued
: 1;
569 /* This flag will be set when reading partial DIEs if we need to load
570 absolutely all DIEs for this compilation unit, instead of just the ones
571 we think are interesting. It gets set if we look for a DIE in the
572 hash table and don't find it. */
573 unsigned int load_all_dies
: 1;
575 /* Non-zero if this CU is from .debug_types.
576 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
578 unsigned int is_debug_types
: 1;
580 /* Non-zero if this CU is from the .dwz file. */
581 unsigned int is_dwz
: 1;
583 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
584 This flag is only valid if is_debug_types is true.
585 We can't read a CU directly from a DWO file: There are required
586 attributes in the stub. */
587 unsigned int reading_dwo_directly
: 1;
589 /* Non-zero if the TU has been read.
590 This is used to assist the "Stay in DWO Optimization" for Fission:
591 When reading a DWO, it's faster to read TUs from the DWO instead of
592 fetching them from random other DWOs (due to comdat folding).
593 If the TU has already been read, the optimization is unnecessary
594 (and unwise - we don't want to change where gdb thinks the TU lives
596 This flag is only valid if is_debug_types is true. */
597 unsigned int tu_read
: 1;
599 /* The section this CU/TU lives in.
600 If the DIE refers to a DWO file, this is always the original die,
602 struct dwarf2_section_info
*section
;
604 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
605 of the CU cache it gets reset to NULL again. */
606 struct dwarf2_cu
*cu
;
608 /* The corresponding objfile.
609 Normally we can get the objfile from dwarf2_per_objfile.
610 However we can enter this file with just a "per_cu" handle. */
611 struct objfile
*objfile
;
613 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
614 is active. Otherwise, the 'psymtab' field is active. */
617 /* The partial symbol table associated with this compilation unit,
618 or NULL for unread partial units. */
619 struct partial_symtab
*psymtab
;
621 /* Data needed by the "quick" functions. */
622 struct dwarf2_per_cu_quick_data
*quick
;
625 /* The CUs we import using DW_TAG_imported_unit. This is filled in
626 while reading psymtabs, used to compute the psymtab dependencies,
627 and then cleared. Then it is filled in again while reading full
628 symbols, and only deleted when the objfile is destroyed.
630 This is also used to work around a difference between the way gold
631 generates .gdb_index version <=7 and the way gdb does. Arguably this
632 is a gold bug. For symbols coming from TUs, gold records in the index
633 the CU that includes the TU instead of the TU itself. This breaks
634 dw2_lookup_symbol: It assumes that if the index says symbol X lives
635 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
636 will find X. Alas TUs live in their own symtab, so after expanding CU Y
637 we need to look in TU Z to find X. Fortunately, this is akin to
638 DW_TAG_imported_unit, so we just use the same mechanism: For
639 .gdb_index version <=7 this also records the TUs that the CU referred
640 to. Concurrently with this change gdb was modified to emit version 8
641 indices so we only pay a price for gold generated indices.
642 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
643 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
646 /* Entry in the signatured_types hash table. */
648 struct signatured_type
650 /* The "per_cu" object of this type.
651 This struct is used iff per_cu.is_debug_types.
652 N.B.: This is the first member so that it's easy to convert pointers
654 struct dwarf2_per_cu_data per_cu
;
656 /* The type's signature. */
659 /* Offset in the TU of the type's DIE, as read from the TU header.
660 If this TU is a DWO stub and the definition lives in a DWO file
661 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
662 cu_offset type_offset_in_tu
;
664 /* Offset in the section of the type's DIE.
665 If the definition lives in a DWO file, this is the offset in the
666 .debug_types.dwo section.
667 The value is zero until the actual value is known.
668 Zero is otherwise not a valid section offset. */
669 sect_offset type_offset_in_section
;
671 /* Type units are grouped by their DW_AT_stmt_list entry so that they
672 can share them. This points to the containing symtab. */
673 struct type_unit_group
*type_unit_group
;
676 The first time we encounter this type we fully read it in and install it
677 in the symbol tables. Subsequent times we only need the type. */
680 /* Containing DWO unit.
681 This field is valid iff per_cu.reading_dwo_directly. */
682 struct dwo_unit
*dwo_unit
;
685 typedef struct signatured_type
*sig_type_ptr
;
686 DEF_VEC_P (sig_type_ptr
);
688 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
689 This includes type_unit_group and quick_file_names. */
691 struct stmt_list_hash
693 /* The DWO unit this table is from or NULL if there is none. */
694 struct dwo_unit
*dwo_unit
;
696 /* Offset in .debug_line or .debug_line.dwo. */
697 sect_offset line_offset
;
700 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
701 an object of this type. */
703 struct type_unit_group
705 /* dwarf2read.c's main "handle" on a TU symtab.
706 To simplify things we create an artificial CU that "includes" all the
707 type units using this stmt_list so that the rest of the code still has
708 a "per_cu" handle on the symtab.
709 This PER_CU is recognized by having no section. */
710 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
711 struct dwarf2_per_cu_data per_cu
;
713 /* The TUs that share this DW_AT_stmt_list entry.
714 This is added to while parsing type units to build partial symtabs,
715 and is deleted afterwards and not used again. */
716 VEC (sig_type_ptr
) *tus
;
718 /* The compunit symtab.
719 Type units in a group needn't all be defined in the same source file,
720 so we create an essentially anonymous symtab as the compunit symtab. */
721 struct compunit_symtab
*compunit_symtab
;
723 /* The data used to construct the hash key. */
724 struct stmt_list_hash hash
;
726 /* The number of symtabs from the line header.
727 The value here must match line_header.num_file_names. */
728 unsigned int num_symtabs
;
730 /* The symbol tables for this TU (obtained from the files listed in
732 WARNING: The order of entries here must match the order of entries
733 in the line header. After the first TU using this type_unit_group, the
734 line header for the subsequent TUs is recreated from this. This is done
735 because we need to use the same symtabs for each TU using the same
736 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
737 there's no guarantee the line header doesn't have duplicate entries. */
738 struct symtab
**symtabs
;
741 /* These sections are what may appear in a (real or virtual) DWO file. */
745 struct dwarf2_section_info abbrev
;
746 struct dwarf2_section_info line
;
747 struct dwarf2_section_info loc
;
748 struct dwarf2_section_info macinfo
;
749 struct dwarf2_section_info macro
;
750 struct dwarf2_section_info str
;
751 struct dwarf2_section_info str_offsets
;
752 /* In the case of a virtual DWO file, these two are unused. */
753 struct dwarf2_section_info info
;
754 VEC (dwarf2_section_info_def
) *types
;
757 /* CUs/TUs in DWP/DWO files. */
761 /* Backlink to the containing struct dwo_file. */
762 struct dwo_file
*dwo_file
;
764 /* The "id" that distinguishes this CU/TU.
765 .debug_info calls this "dwo_id", .debug_types calls this "signature".
766 Since signatures came first, we stick with it for consistency. */
769 /* The section this CU/TU lives in, in the DWO file. */
770 struct dwarf2_section_info
*section
;
772 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
776 /* For types, offset in the type's DIE of the type defined by this TU. */
777 cu_offset type_offset_in_tu
;
780 /* include/dwarf2.h defines the DWP section codes.
781 It defines a max value but it doesn't define a min value, which we
782 use for error checking, so provide one. */
784 enum dwp_v2_section_ids
789 /* Data for one DWO file.
791 This includes virtual DWO files (a virtual DWO file is a DWO file as it
792 appears in a DWP file). DWP files don't really have DWO files per se -
793 comdat folding of types "loses" the DWO file they came from, and from
794 a high level view DWP files appear to contain a mass of random types.
795 However, to maintain consistency with the non-DWP case we pretend DWP
796 files contain virtual DWO files, and we assign each TU with one virtual
797 DWO file (generally based on the line and abbrev section offsets -
798 a heuristic that seems to work in practice). */
802 /* The DW_AT_GNU_dwo_name attribute.
803 For virtual DWO files the name is constructed from the section offsets
804 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
805 from related CU+TUs. */
806 const char *dwo_name
;
808 /* The DW_AT_comp_dir attribute. */
809 const char *comp_dir
;
811 /* The bfd, when the file is open. Otherwise this is NULL.
812 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
815 /* The sections that make up this DWO file.
816 Remember that for virtual DWO files in DWP V2, these are virtual
817 sections (for lack of a better name). */
818 struct dwo_sections sections
;
820 /* The CU in the file.
821 We only support one because having more than one requires hacking the
822 dwo_name of each to match, which is highly unlikely to happen.
823 Doing this means all TUs can share comp_dir: We also assume that
824 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
827 /* Table of TUs in the file.
828 Each element is a struct dwo_unit. */
832 /* These sections are what may appear in a DWP file. */
836 /* These are used by both DWP version 1 and 2. */
837 struct dwarf2_section_info str
;
838 struct dwarf2_section_info cu_index
;
839 struct dwarf2_section_info tu_index
;
841 /* These are only used by DWP version 2 files.
842 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
843 sections are referenced by section number, and are not recorded here.
844 In DWP version 2 there is at most one copy of all these sections, each
845 section being (effectively) comprised of the concatenation of all of the
846 individual sections that exist in the version 1 format.
847 To keep the code simple we treat each of these concatenated pieces as a
848 section itself (a virtual section?). */
849 struct dwarf2_section_info abbrev
;
850 struct dwarf2_section_info info
;
851 struct dwarf2_section_info line
;
852 struct dwarf2_section_info loc
;
853 struct dwarf2_section_info macinfo
;
854 struct dwarf2_section_info macro
;
855 struct dwarf2_section_info str_offsets
;
856 struct dwarf2_section_info types
;
859 /* These sections are what may appear in a virtual DWO file in DWP version 1.
860 A virtual DWO file is a DWO file as it appears in a DWP file. */
862 struct virtual_v1_dwo_sections
864 struct dwarf2_section_info abbrev
;
865 struct dwarf2_section_info line
;
866 struct dwarf2_section_info loc
;
867 struct dwarf2_section_info macinfo
;
868 struct dwarf2_section_info macro
;
869 struct dwarf2_section_info str_offsets
;
870 /* Each DWP hash table entry records one CU or one TU.
871 That is recorded here, and copied to dwo_unit.section. */
872 struct dwarf2_section_info info_or_types
;
875 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
876 In version 2, the sections of the DWO files are concatenated together
877 and stored in one section of that name. Thus each ELF section contains
878 several "virtual" sections. */
880 struct virtual_v2_dwo_sections
882 bfd_size_type abbrev_offset
;
883 bfd_size_type abbrev_size
;
885 bfd_size_type line_offset
;
886 bfd_size_type line_size
;
888 bfd_size_type loc_offset
;
889 bfd_size_type loc_size
;
891 bfd_size_type macinfo_offset
;
892 bfd_size_type macinfo_size
;
894 bfd_size_type macro_offset
;
895 bfd_size_type macro_size
;
897 bfd_size_type str_offsets_offset
;
898 bfd_size_type str_offsets_size
;
900 /* Each DWP hash table entry records one CU or one TU.
901 That is recorded here, and copied to dwo_unit.section. */
902 bfd_size_type info_or_types_offset
;
903 bfd_size_type info_or_types_size
;
906 /* Contents of DWP hash tables. */
908 struct dwp_hash_table
910 uint32_t version
, nr_columns
;
911 uint32_t nr_units
, nr_slots
;
912 const gdb_byte
*hash_table
, *unit_table
;
917 const gdb_byte
*indices
;
921 /* This is indexed by column number and gives the id of the section
923 #define MAX_NR_V2_DWO_SECTIONS \
924 (1 /* .debug_info or .debug_types */ \
925 + 1 /* .debug_abbrev */ \
926 + 1 /* .debug_line */ \
927 + 1 /* .debug_loc */ \
928 + 1 /* .debug_str_offsets */ \
929 + 1 /* .debug_macro or .debug_macinfo */)
930 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
931 const gdb_byte
*offsets
;
932 const gdb_byte
*sizes
;
937 /* Data for one DWP file. */
941 /* Name of the file. */
944 /* File format version. */
950 /* Section info for this file. */
951 struct dwp_sections sections
;
953 /* Table of CUs in the file. */
954 const struct dwp_hash_table
*cus
;
956 /* Table of TUs in the file. */
957 const struct dwp_hash_table
*tus
;
959 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
963 /* Table to map ELF section numbers to their sections.
964 This is only needed for the DWP V1 file format. */
965 unsigned int num_sections
;
966 asection
**elf_sections
;
969 /* This represents a '.dwz' file. */
973 /* A dwz file can only contain a few sections. */
974 struct dwarf2_section_info abbrev
;
975 struct dwarf2_section_info info
;
976 struct dwarf2_section_info str
;
977 struct dwarf2_section_info line
;
978 struct dwarf2_section_info macro
;
979 struct dwarf2_section_info gdb_index
;
985 /* Struct used to pass misc. parameters to read_die_and_children, et
986 al. which are used for both .debug_info and .debug_types dies.
987 All parameters here are unchanging for the life of the call. This
988 struct exists to abstract away the constant parameters of die reading. */
990 struct die_reader_specs
992 /* The bfd of die_section. */
995 /* The CU of the DIE we are parsing. */
996 struct dwarf2_cu
*cu
;
998 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
999 struct dwo_file
*dwo_file
;
1001 /* The section the die comes from.
1002 This is either .debug_info or .debug_types, or the .dwo variants. */
1003 struct dwarf2_section_info
*die_section
;
1005 /* die_section->buffer. */
1006 const gdb_byte
*buffer
;
1008 /* The end of the buffer. */
1009 const gdb_byte
*buffer_end
;
1011 /* The value of the DW_AT_comp_dir attribute. */
1012 const char *comp_dir
;
1015 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1016 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1017 const gdb_byte
*info_ptr
,
1018 struct die_info
*comp_unit_die
,
1022 /* The line number information for a compilation unit (found in the
1023 .debug_line section) begins with a "statement program header",
1024 which contains the following information. */
1027 unsigned int total_length
;
1028 unsigned short version
;
1029 unsigned int header_length
;
1030 unsigned char minimum_instruction_length
;
1031 unsigned char maximum_ops_per_instruction
;
1032 unsigned char default_is_stmt
;
1034 unsigned char line_range
;
1035 unsigned char opcode_base
;
1037 /* standard_opcode_lengths[i] is the number of operands for the
1038 standard opcode whose value is i. This means that
1039 standard_opcode_lengths[0] is unused, and the last meaningful
1040 element is standard_opcode_lengths[opcode_base - 1]. */
1041 unsigned char *standard_opcode_lengths
;
1043 /* The include_directories table. NOTE! These strings are not
1044 allocated with xmalloc; instead, they are pointers into
1045 debug_line_buffer. If you try to free them, `free' will get
1047 unsigned int num_include_dirs
, include_dirs_size
;
1048 const char **include_dirs
;
1050 /* The file_names table. NOTE! These strings are not allocated
1051 with xmalloc; instead, they are pointers into debug_line_buffer.
1052 Don't try to free them directly. */
1053 unsigned int num_file_names
, file_names_size
;
1057 unsigned int dir_index
;
1058 unsigned int mod_time
;
1059 unsigned int length
;
1060 int included_p
; /* Non-zero if referenced by the Line Number Program. */
1061 struct symtab
*symtab
; /* The associated symbol table, if any. */
1064 /* The start and end of the statement program following this
1065 header. These point into dwarf2_per_objfile->line_buffer. */
1066 const gdb_byte
*statement_program_start
, *statement_program_end
;
1069 /* When we construct a partial symbol table entry we only
1070 need this much information. */
1071 struct partial_die_info
1073 /* Offset of this DIE. */
1076 /* DWARF-2 tag for this DIE. */
1077 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1079 /* Assorted flags describing the data found in this DIE. */
1080 unsigned int has_children
: 1;
1081 unsigned int is_external
: 1;
1082 unsigned int is_declaration
: 1;
1083 unsigned int has_type
: 1;
1084 unsigned int has_specification
: 1;
1085 unsigned int has_pc_info
: 1;
1086 unsigned int may_be_inlined
: 1;
1088 /* Flag set if the SCOPE field of this structure has been
1090 unsigned int scope_set
: 1;
1092 /* Flag set if the DIE has a byte_size attribute. */
1093 unsigned int has_byte_size
: 1;
1095 /* Flag set if any of the DIE's children are template arguments. */
1096 unsigned int has_template_arguments
: 1;
1098 /* Flag set if fixup_partial_die has been called on this die. */
1099 unsigned int fixup_called
: 1;
1101 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1102 unsigned int is_dwz
: 1;
1104 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1105 unsigned int spec_is_dwz
: 1;
1107 /* The name of this DIE. Normally the value of DW_AT_name, but
1108 sometimes a default name for unnamed DIEs. */
1111 /* The linkage name, if present. */
1112 const char *linkage_name
;
1114 /* The scope to prepend to our children. This is generally
1115 allocated on the comp_unit_obstack, so will disappear
1116 when this compilation unit leaves the cache. */
1119 /* Some data associated with the partial DIE. The tag determines
1120 which field is live. */
1123 /* The location description associated with this DIE, if any. */
1124 struct dwarf_block
*locdesc
;
1125 /* The offset of an import, for DW_TAG_imported_unit. */
1129 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1133 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1134 DW_AT_sibling, if any. */
1135 /* NOTE: This member isn't strictly necessary, read_partial_die could
1136 return DW_AT_sibling values to its caller load_partial_dies. */
1137 const gdb_byte
*sibling
;
1139 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1140 DW_AT_specification (or DW_AT_abstract_origin or
1141 DW_AT_extension). */
1142 sect_offset spec_offset
;
1144 /* Pointers to this DIE's parent, first child, and next sibling,
1146 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1149 /* This data structure holds the information of an abbrev. */
1152 unsigned int number
; /* number identifying abbrev */
1153 enum dwarf_tag tag
; /* dwarf tag */
1154 unsigned short has_children
; /* boolean */
1155 unsigned short num_attrs
; /* number of attributes */
1156 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1157 struct abbrev_info
*next
; /* next in chain */
1162 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1163 ENUM_BITFIELD(dwarf_form
) form
: 16;
1166 /* Size of abbrev_table.abbrev_hash_table. */
1167 #define ABBREV_HASH_SIZE 121
1169 /* Top level data structure to contain an abbreviation table. */
1173 /* Where the abbrev table came from.
1174 This is used as a sanity check when the table is used. */
1177 /* Storage for the abbrev table. */
1178 struct obstack abbrev_obstack
;
1180 /* Hash table of abbrevs.
1181 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1182 It could be statically allocated, but the previous code didn't so we
1184 struct abbrev_info
**abbrevs
;
1187 /* Attributes have a name and a value. */
1190 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1191 ENUM_BITFIELD(dwarf_form
) form
: 15;
1193 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1194 field should be in u.str (existing only for DW_STRING) but it is kept
1195 here for better struct attribute alignment. */
1196 unsigned int string_is_canonical
: 1;
1201 struct dwarf_block
*blk
;
1210 /* This data structure holds a complete die structure. */
1213 /* DWARF-2 tag for this DIE. */
1214 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1216 /* Number of attributes */
1217 unsigned char num_attrs
;
1219 /* True if we're presently building the full type name for the
1220 type derived from this DIE. */
1221 unsigned char building_fullname
: 1;
1223 /* True if this die is in process. PR 16581. */
1224 unsigned char in_process
: 1;
1227 unsigned int abbrev
;
1229 /* Offset in .debug_info or .debug_types section. */
1232 /* The dies in a compilation unit form an n-ary tree. PARENT
1233 points to this die's parent; CHILD points to the first child of
1234 this node; and all the children of a given node are chained
1235 together via their SIBLING fields. */
1236 struct die_info
*child
; /* Its first child, if any. */
1237 struct die_info
*sibling
; /* Its next sibling, if any. */
1238 struct die_info
*parent
; /* Its parent, if any. */
1240 /* An array of attributes, with NUM_ATTRS elements. There may be
1241 zero, but it's not common and zero-sized arrays are not
1242 sufficiently portable C. */
1243 struct attribute attrs
[1];
1246 /* Get at parts of an attribute structure. */
1248 #define DW_STRING(attr) ((attr)->u.str)
1249 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1250 #define DW_UNSND(attr) ((attr)->u.unsnd)
1251 #define DW_BLOCK(attr) ((attr)->u.blk)
1252 #define DW_SND(attr) ((attr)->u.snd)
1253 #define DW_ADDR(attr) ((attr)->u.addr)
1254 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1256 /* Blocks are a bunch of untyped bytes. */
1261 /* Valid only if SIZE is not zero. */
1262 const gdb_byte
*data
;
1265 #ifndef ATTR_ALLOC_CHUNK
1266 #define ATTR_ALLOC_CHUNK 4
1269 /* Allocate fields for structs, unions and enums in this size. */
1270 #ifndef DW_FIELD_ALLOC_CHUNK
1271 #define DW_FIELD_ALLOC_CHUNK 4
1274 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1275 but this would require a corresponding change in unpack_field_as_long
1277 static int bits_per_byte
= 8;
1279 /* The routines that read and process dies for a C struct or C++ class
1280 pass lists of data member fields and lists of member function fields
1281 in an instance of a field_info structure, as defined below. */
1284 /* List of data member and baseclasses fields. */
1287 struct nextfield
*next
;
1292 *fields
, *baseclasses
;
1294 /* Number of fields (including baseclasses). */
1297 /* Number of baseclasses. */
1300 /* Set if the accesibility of one of the fields is not public. */
1301 int non_public_fields
;
1303 /* Member function fields array, entries are allocated in the order they
1304 are encountered in the object file. */
1307 struct nextfnfield
*next
;
1308 struct fn_field fnfield
;
1312 /* Member function fieldlist array, contains name of possibly overloaded
1313 member function, number of overloaded member functions and a pointer
1314 to the head of the member function field chain. */
1319 struct nextfnfield
*head
;
1323 /* Number of entries in the fnfieldlists array. */
1326 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1327 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1328 struct typedef_field_list
1330 struct typedef_field field
;
1331 struct typedef_field_list
*next
;
1333 *typedef_field_list
;
1334 unsigned typedef_field_list_count
;
1337 /* One item on the queue of compilation units to read in full symbols
1339 struct dwarf2_queue_item
1341 struct dwarf2_per_cu_data
*per_cu
;
1342 enum language pretend_language
;
1343 struct dwarf2_queue_item
*next
;
1346 /* The current queue. */
1347 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1349 /* Loaded secondary compilation units are kept in memory until they
1350 have not been referenced for the processing of this many
1351 compilation units. Set this to zero to disable caching. Cache
1352 sizes of up to at least twenty will improve startup time for
1353 typical inter-CU-reference binaries, at an obvious memory cost. */
1354 static int dwarf2_max_cache_age
= 5;
1356 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1357 struct cmd_list_element
*c
, const char *value
)
1359 fprintf_filtered (file
, _("The upper bound on the age of cached "
1360 "dwarf2 compilation units is %s.\n"),
1364 /* local function prototypes */
1366 static const char *get_section_name (const struct dwarf2_section_info
*);
1368 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1370 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1372 static void dwarf2_find_base_address (struct die_info
*die
,
1373 struct dwarf2_cu
*cu
);
1375 static struct partial_symtab
*create_partial_symtab
1376 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1378 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1380 static void scan_partial_symbols (struct partial_die_info
*,
1381 CORE_ADDR
*, CORE_ADDR
*,
1382 int, struct dwarf2_cu
*);
1384 static void add_partial_symbol (struct partial_die_info
*,
1385 struct dwarf2_cu
*);
1387 static void add_partial_namespace (struct partial_die_info
*pdi
,
1388 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1389 int set_addrmap
, struct dwarf2_cu
*cu
);
1391 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1392 CORE_ADDR
*highpc
, int set_addrmap
,
1393 struct dwarf2_cu
*cu
);
1395 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1396 struct dwarf2_cu
*cu
);
1398 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1399 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1400 int need_pc
, struct dwarf2_cu
*cu
);
1402 static void dwarf2_read_symtab (struct partial_symtab
*,
1405 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1407 static struct abbrev_info
*abbrev_table_lookup_abbrev
1408 (const struct abbrev_table
*, unsigned int);
1410 static struct abbrev_table
*abbrev_table_read_table
1411 (struct dwarf2_section_info
*, sect_offset
);
1413 static void abbrev_table_free (struct abbrev_table
*);
1415 static void abbrev_table_free_cleanup (void *);
1417 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1418 struct dwarf2_section_info
*);
1420 static void dwarf2_free_abbrev_table (void *);
1422 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1424 static struct partial_die_info
*load_partial_dies
1425 (const struct die_reader_specs
*, const gdb_byte
*, int);
1427 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1428 struct partial_die_info
*,
1429 struct abbrev_info
*,
1433 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1434 struct dwarf2_cu
*);
1436 static void fixup_partial_die (struct partial_die_info
*,
1437 struct dwarf2_cu
*);
1439 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1440 struct attribute
*, struct attr_abbrev
*,
1443 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1445 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1447 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1449 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1451 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1453 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1456 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1458 static LONGEST read_checked_initial_length_and_offset
1459 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1460 unsigned int *, unsigned int *);
1462 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1463 const struct comp_unit_head
*,
1466 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1468 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1471 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1473 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1475 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1476 const struct comp_unit_head
*,
1479 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1481 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1483 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1485 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1489 static const char *read_str_index (const struct die_reader_specs
*reader
,
1490 ULONGEST str_index
);
1492 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1494 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1495 struct dwarf2_cu
*);
1497 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1500 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1501 struct dwarf2_cu
*cu
);
1503 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1505 static struct die_info
*die_specification (struct die_info
*die
,
1506 struct dwarf2_cu
**);
1508 static void free_line_header (struct line_header
*lh
);
1510 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1511 struct dwarf2_cu
*cu
);
1513 static void dwarf_decode_lines (struct line_header
*, const char *,
1514 struct dwarf2_cu
*, struct partial_symtab
*,
1517 static void dwarf2_start_subfile (const char *, const char *);
1519 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1520 const char *, const char *,
1523 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1524 struct dwarf2_cu
*);
1526 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1527 struct dwarf2_cu
*, struct symbol
*);
1529 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1530 struct dwarf2_cu
*);
1532 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1535 struct obstack
*obstack
,
1536 struct dwarf2_cu
*cu
, LONGEST
*value
,
1537 const gdb_byte
**bytes
,
1538 struct dwarf2_locexpr_baton
**baton
);
1540 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1542 static int need_gnat_info (struct dwarf2_cu
*);
1544 static struct type
*die_descriptive_type (struct die_info
*,
1545 struct dwarf2_cu
*);
1547 static void set_descriptive_type (struct type
*, struct die_info
*,
1548 struct dwarf2_cu
*);
1550 static struct type
*die_containing_type (struct die_info
*,
1551 struct dwarf2_cu
*);
1553 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1554 struct dwarf2_cu
*);
1556 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1558 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1560 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1562 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1563 const char *suffix
, int physname
,
1564 struct dwarf2_cu
*cu
);
1566 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1568 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1570 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1572 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1574 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1576 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1577 struct dwarf2_cu
*, struct partial_symtab
*);
1579 static int dwarf2_get_pc_bounds (struct die_info
*,
1580 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1581 struct partial_symtab
*);
1583 static void get_scope_pc_bounds (struct die_info
*,
1584 CORE_ADDR
*, CORE_ADDR
*,
1585 struct dwarf2_cu
*);
1587 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1588 CORE_ADDR
, struct dwarf2_cu
*);
1590 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1591 struct dwarf2_cu
*);
1593 static void dwarf2_attach_fields_to_type (struct field_info
*,
1594 struct type
*, struct dwarf2_cu
*);
1596 static void dwarf2_add_member_fn (struct field_info
*,
1597 struct die_info
*, struct type
*,
1598 struct dwarf2_cu
*);
1600 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1602 struct dwarf2_cu
*);
1604 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1606 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1608 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1610 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1612 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1614 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1616 static struct type
*read_module_type (struct die_info
*die
,
1617 struct dwarf2_cu
*cu
);
1619 static const char *namespace_name (struct die_info
*die
,
1620 int *is_anonymous
, struct dwarf2_cu
*);
1622 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1624 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1626 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1627 struct dwarf2_cu
*);
1629 static struct die_info
*read_die_and_siblings_1
1630 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1633 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1634 const gdb_byte
*info_ptr
,
1635 const gdb_byte
**new_info_ptr
,
1636 struct die_info
*parent
);
1638 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1639 struct die_info
**, const gdb_byte
*,
1642 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1643 struct die_info
**, const gdb_byte
*,
1646 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1648 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1651 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1653 static const char *dwarf2_full_name (const char *name
,
1654 struct die_info
*die
,
1655 struct dwarf2_cu
*cu
);
1657 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1658 struct dwarf2_cu
*cu
);
1660 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1661 struct dwarf2_cu
**);
1663 static const char *dwarf_tag_name (unsigned int);
1665 static const char *dwarf_attr_name (unsigned int);
1667 static const char *dwarf_form_name (unsigned int);
1669 static char *dwarf_bool_name (unsigned int);
1671 static const char *dwarf_type_encoding_name (unsigned int);
1673 static struct die_info
*sibling_die (struct die_info
*);
1675 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1677 static void dump_die_for_error (struct die_info
*);
1679 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1682 /*static*/ void dump_die (struct die_info
*, int max_level
);
1684 static void store_in_ref_table (struct die_info
*,
1685 struct dwarf2_cu
*);
1687 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1689 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1691 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1692 const struct attribute
*,
1693 struct dwarf2_cu
**);
1695 static struct die_info
*follow_die_ref (struct die_info
*,
1696 const struct attribute
*,
1697 struct dwarf2_cu
**);
1699 static struct die_info
*follow_die_sig (struct die_info
*,
1700 const struct attribute
*,
1701 struct dwarf2_cu
**);
1703 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1704 struct dwarf2_cu
*);
1706 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1707 const struct attribute
*,
1708 struct dwarf2_cu
*);
1710 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1712 static void read_signatured_type (struct signatured_type
*);
1714 /* memory allocation interface */
1716 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1718 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1720 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1722 static int attr_form_is_block (const struct attribute
*);
1724 static int attr_form_is_section_offset (const struct attribute
*);
1726 static int attr_form_is_constant (const struct attribute
*);
1728 static int attr_form_is_ref (const struct attribute
*);
1730 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1731 struct dwarf2_loclist_baton
*baton
,
1732 const struct attribute
*attr
);
1734 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1736 struct dwarf2_cu
*cu
,
1739 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1740 const gdb_byte
*info_ptr
,
1741 struct abbrev_info
*abbrev
);
1743 static void free_stack_comp_unit (void *);
1745 static hashval_t
partial_die_hash (const void *item
);
1747 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1749 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1750 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1752 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1753 struct dwarf2_per_cu_data
*per_cu
);
1755 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1756 struct die_info
*comp_unit_die
,
1757 enum language pretend_language
);
1759 static void free_heap_comp_unit (void *);
1761 static void free_cached_comp_units (void *);
1763 static void age_cached_comp_units (void);
1765 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1767 static struct type
*set_die_type (struct die_info
*, struct type
*,
1768 struct dwarf2_cu
*);
1770 static void create_all_comp_units (struct objfile
*);
1772 static int create_all_type_units (struct objfile
*);
1774 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1777 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1780 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1783 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1784 struct dwarf2_per_cu_data
*);
1786 static void dwarf2_mark (struct dwarf2_cu
*);
1788 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1790 static struct type
*get_die_type_at_offset (sect_offset
,
1791 struct dwarf2_per_cu_data
*);
1793 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1795 static void dwarf2_release_queue (void *dummy
);
1797 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1798 enum language pretend_language
);
1800 static void process_queue (void);
1802 static void find_file_and_directory (struct die_info
*die
,
1803 struct dwarf2_cu
*cu
,
1804 const char **name
, const char **comp_dir
);
1806 static char *file_full_name (int file
, struct line_header
*lh
,
1807 const char *comp_dir
);
1809 static const gdb_byte
*read_and_check_comp_unit_head
1810 (struct comp_unit_head
*header
,
1811 struct dwarf2_section_info
*section
,
1812 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1813 int is_debug_types_section
);
1815 static void init_cutu_and_read_dies
1816 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1817 int use_existing_cu
, int keep
,
1818 die_reader_func_ftype
*die_reader_func
, void *data
);
1820 static void init_cutu_and_read_dies_simple
1821 (struct dwarf2_per_cu_data
*this_cu
,
1822 die_reader_func_ftype
*die_reader_func
, void *data
);
1824 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1826 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1828 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1829 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1830 ULONGEST signature
, int is_debug_types
);
1832 static struct dwp_file
*get_dwp_file (void);
1834 static struct dwo_unit
*lookup_dwo_comp_unit
1835 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1837 static struct dwo_unit
*lookup_dwo_type_unit
1838 (struct signatured_type
*, const char *, const char *);
1840 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1842 static void free_dwo_file_cleanup (void *);
1844 static void process_cu_includes (void);
1846 static void check_producer (struct dwarf2_cu
*cu
);
1848 /* Various complaints about symbol reading that don't abort the process. */
1851 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1853 complaint (&symfile_complaints
,
1854 _("statement list doesn't fit in .debug_line section"));
1858 dwarf2_debug_line_missing_file_complaint (void)
1860 complaint (&symfile_complaints
,
1861 _(".debug_line section has line data without a file"));
1865 dwarf2_debug_line_missing_end_sequence_complaint (void)
1867 complaint (&symfile_complaints
,
1868 _(".debug_line section has line "
1869 "program sequence without an end"));
1873 dwarf2_complex_location_expr_complaint (void)
1875 complaint (&symfile_complaints
, _("location expression too complex"));
1879 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1882 complaint (&symfile_complaints
,
1883 _("const value length mismatch for '%s', got %d, expected %d"),
1888 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1890 complaint (&symfile_complaints
,
1891 _("debug info runs off end of %s section"
1893 get_section_name (section
),
1894 get_section_file_name (section
));
1898 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1900 complaint (&symfile_complaints
,
1901 _("macro debug info contains a "
1902 "malformed macro definition:\n`%s'"),
1907 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1909 complaint (&symfile_complaints
,
1910 _("invalid attribute class or form for '%s' in '%s'"),
1916 /* Convert VALUE between big- and little-endian. */
1918 byte_swap (offset_type value
)
1922 result
= (value
& 0xff) << 24;
1923 result
|= (value
& 0xff00) << 8;
1924 result
|= (value
& 0xff0000) >> 8;
1925 result
|= (value
& 0xff000000) >> 24;
1929 #define MAYBE_SWAP(V) byte_swap (V)
1932 #define MAYBE_SWAP(V) (V)
1933 #endif /* WORDS_BIGENDIAN */
1935 /* Read the given attribute value as an address, taking the attribute's
1936 form into account. */
1939 attr_value_as_address (struct attribute
*attr
)
1943 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
1945 /* Aside from a few clearly defined exceptions, attributes that
1946 contain an address must always be in DW_FORM_addr form.
1947 Unfortunately, some compilers happen to be violating this
1948 requirement by encoding addresses using other forms, such
1949 as DW_FORM_data4 for example. For those broken compilers,
1950 we try to do our best, without any guarantee of success,
1951 to interpret the address correctly. It would also be nice
1952 to generate a complaint, but that would require us to maintain
1953 a list of legitimate cases where a non-address form is allowed,
1954 as well as update callers to pass in at least the CU's DWARF
1955 version. This is more overhead than what we're willing to
1956 expand for a pretty rare case. */
1957 addr
= DW_UNSND (attr
);
1960 addr
= DW_ADDR (attr
);
1965 /* The suffix for an index file. */
1966 #define INDEX_SUFFIX ".gdb-index"
1968 /* Try to locate the sections we need for DWARF 2 debugging
1969 information and return true if we have enough to do something.
1970 NAMES points to the dwarf2 section names, or is NULL if the standard
1971 ELF names are used. */
1974 dwarf2_has_info (struct objfile
*objfile
,
1975 const struct dwarf2_debug_sections
*names
)
1977 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1978 if (!dwarf2_per_objfile
)
1980 /* Initialize per-objfile state. */
1981 struct dwarf2_per_objfile
*data
1982 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1984 memset (data
, 0, sizeof (*data
));
1985 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1986 dwarf2_per_objfile
= data
;
1988 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1990 dwarf2_per_objfile
->objfile
= objfile
;
1992 return (!dwarf2_per_objfile
->info
.is_virtual
1993 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
1994 && !dwarf2_per_objfile
->abbrev
.is_virtual
1995 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
1998 /* Return the containing section of virtual section SECTION. */
2000 static struct dwarf2_section_info
*
2001 get_containing_section (const struct dwarf2_section_info
*section
)
2003 gdb_assert (section
->is_virtual
);
2004 return section
->s
.containing_section
;
2007 /* Return the bfd owner of SECTION. */
2010 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2012 if (section
->is_virtual
)
2014 section
= get_containing_section (section
);
2015 gdb_assert (!section
->is_virtual
);
2017 return section
->s
.asection
->owner
;
2020 /* Return the bfd section of SECTION.
2021 Returns NULL if the section is not present. */
2024 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2026 if (section
->is_virtual
)
2028 section
= get_containing_section (section
);
2029 gdb_assert (!section
->is_virtual
);
2031 return section
->s
.asection
;
2034 /* Return the name of SECTION. */
2037 get_section_name (const struct dwarf2_section_info
*section
)
2039 asection
*sectp
= get_section_bfd_section (section
);
2041 gdb_assert (sectp
!= NULL
);
2042 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2045 /* Return the name of the file SECTION is in. */
2048 get_section_file_name (const struct dwarf2_section_info
*section
)
2050 bfd
*abfd
= get_section_bfd_owner (section
);
2052 return bfd_get_filename (abfd
);
2055 /* Return the id of SECTION.
2056 Returns 0 if SECTION doesn't exist. */
2059 get_section_id (const struct dwarf2_section_info
*section
)
2061 asection
*sectp
= get_section_bfd_section (section
);
2068 /* Return the flags of SECTION.
2069 SECTION (or containing section if this is a virtual section) must exist. */
2072 get_section_flags (const struct dwarf2_section_info
*section
)
2074 asection
*sectp
= get_section_bfd_section (section
);
2076 gdb_assert (sectp
!= NULL
);
2077 return bfd_get_section_flags (sectp
->owner
, sectp
);
2080 /* When loading sections, we look either for uncompressed section or for
2081 compressed section names. */
2084 section_is_p (const char *section_name
,
2085 const struct dwarf2_section_names
*names
)
2087 if (names
->normal
!= NULL
2088 && strcmp (section_name
, names
->normal
) == 0)
2090 if (names
->compressed
!= NULL
2091 && strcmp (section_name
, names
->compressed
) == 0)
2096 /* This function is mapped across the sections and remembers the
2097 offset and size of each of the debugging sections we are interested
2101 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2103 const struct dwarf2_debug_sections
*names
;
2104 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2107 names
= &dwarf2_elf_names
;
2109 names
= (const struct dwarf2_debug_sections
*) vnames
;
2111 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2114 else if (section_is_p (sectp
->name
, &names
->info
))
2116 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2117 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2119 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2121 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2122 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2124 else if (section_is_p (sectp
->name
, &names
->line
))
2126 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2127 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2129 else if (section_is_p (sectp
->name
, &names
->loc
))
2131 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2132 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2134 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2136 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2137 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2139 else if (section_is_p (sectp
->name
, &names
->macro
))
2141 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2142 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2144 else if (section_is_p (sectp
->name
, &names
->str
))
2146 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2147 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2149 else if (section_is_p (sectp
->name
, &names
->addr
))
2151 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2152 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2154 else if (section_is_p (sectp
->name
, &names
->frame
))
2156 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2157 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2159 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2161 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2162 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2164 else if (section_is_p (sectp
->name
, &names
->ranges
))
2166 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2167 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2169 else if (section_is_p (sectp
->name
, &names
->types
))
2171 struct dwarf2_section_info type_section
;
2173 memset (&type_section
, 0, sizeof (type_section
));
2174 type_section
.s
.asection
= sectp
;
2175 type_section
.size
= bfd_get_section_size (sectp
);
2177 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2180 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2182 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2183 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2186 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
2187 && bfd_section_vma (abfd
, sectp
) == 0)
2188 dwarf2_per_objfile
->has_section_at_zero
= 1;
2191 /* A helper function that decides whether a section is empty,
2195 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2197 if (section
->is_virtual
)
2198 return section
->size
== 0;
2199 return section
->s
.asection
== NULL
|| section
->size
== 0;
2202 /* Read the contents of the section INFO.
2203 OBJFILE is the main object file, but not necessarily the file where
2204 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2206 If the section is compressed, uncompress it before returning. */
2209 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2213 gdb_byte
*buf
, *retbuf
;
2217 info
->buffer
= NULL
;
2220 if (dwarf2_section_empty_p (info
))
2223 sectp
= get_section_bfd_section (info
);
2225 /* If this is a virtual section we need to read in the real one first. */
2226 if (info
->is_virtual
)
2228 struct dwarf2_section_info
*containing_section
=
2229 get_containing_section (info
);
2231 gdb_assert (sectp
!= NULL
);
2232 if ((sectp
->flags
& SEC_RELOC
) != 0)
2234 error (_("Dwarf Error: DWP format V2 with relocations is not"
2235 " supported in section %s [in module %s]"),
2236 get_section_name (info
), get_section_file_name (info
));
2238 dwarf2_read_section (objfile
, containing_section
);
2239 /* Other code should have already caught virtual sections that don't
2241 gdb_assert (info
->virtual_offset
+ info
->size
2242 <= containing_section
->size
);
2243 /* If the real section is empty or there was a problem reading the
2244 section we shouldn't get here. */
2245 gdb_assert (containing_section
->buffer
!= NULL
);
2246 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2250 /* If the section has relocations, we must read it ourselves.
2251 Otherwise we attach it to the BFD. */
2252 if ((sectp
->flags
& SEC_RELOC
) == 0)
2254 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2258 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2261 /* When debugging .o files, we may need to apply relocations; see
2262 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2263 We never compress sections in .o files, so we only need to
2264 try this when the section is not compressed. */
2265 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2268 info
->buffer
= retbuf
;
2272 abfd
= get_section_bfd_owner (info
);
2273 gdb_assert (abfd
!= NULL
);
2275 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2276 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2278 error (_("Dwarf Error: Can't read DWARF data"
2279 " in section %s [in module %s]"),
2280 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2284 /* A helper function that returns the size of a section in a safe way.
2285 If you are positive that the section has been read before using the
2286 size, then it is safe to refer to the dwarf2_section_info object's
2287 "size" field directly. In other cases, you must call this
2288 function, because for compressed sections the size field is not set
2289 correctly until the section has been read. */
2291 static bfd_size_type
2292 dwarf2_section_size (struct objfile
*objfile
,
2293 struct dwarf2_section_info
*info
)
2296 dwarf2_read_section (objfile
, info
);
2300 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2304 dwarf2_get_section_info (struct objfile
*objfile
,
2305 enum dwarf2_section_enum sect
,
2306 asection
**sectp
, const gdb_byte
**bufp
,
2307 bfd_size_type
*sizep
)
2309 struct dwarf2_per_objfile
*data
2310 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2311 struct dwarf2_section_info
*info
;
2313 /* We may see an objfile without any DWARF, in which case we just
2324 case DWARF2_DEBUG_FRAME
:
2325 info
= &data
->frame
;
2327 case DWARF2_EH_FRAME
:
2328 info
= &data
->eh_frame
;
2331 gdb_assert_not_reached ("unexpected section");
2334 dwarf2_read_section (objfile
, info
);
2336 *sectp
= get_section_bfd_section (info
);
2337 *bufp
= info
->buffer
;
2338 *sizep
= info
->size
;
2341 /* A helper function to find the sections for a .dwz file. */
2344 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2346 struct dwz_file
*dwz_file
= arg
;
2348 /* Note that we only support the standard ELF names, because .dwz
2349 is ELF-only (at the time of writing). */
2350 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2352 dwz_file
->abbrev
.s
.asection
= sectp
;
2353 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2355 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2357 dwz_file
->info
.s
.asection
= sectp
;
2358 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2360 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2362 dwz_file
->str
.s
.asection
= sectp
;
2363 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2365 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2367 dwz_file
->line
.s
.asection
= sectp
;
2368 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2370 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2372 dwz_file
->macro
.s
.asection
= sectp
;
2373 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2375 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2377 dwz_file
->gdb_index
.s
.asection
= sectp
;
2378 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2382 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2383 there is no .gnu_debugaltlink section in the file. Error if there
2384 is such a section but the file cannot be found. */
2386 static struct dwz_file
*
2387 dwarf2_get_dwz_file (void)
2391 struct cleanup
*cleanup
;
2392 const char *filename
;
2393 struct dwz_file
*result
;
2394 bfd_size_type buildid_len_arg
;
2398 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2399 return dwarf2_per_objfile
->dwz_file
;
2401 bfd_set_error (bfd_error_no_error
);
2402 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2403 &buildid_len_arg
, &buildid
);
2406 if (bfd_get_error () == bfd_error_no_error
)
2408 error (_("could not read '.gnu_debugaltlink' section: %s"),
2409 bfd_errmsg (bfd_get_error ()));
2411 cleanup
= make_cleanup (xfree
, data
);
2412 make_cleanup (xfree
, buildid
);
2414 buildid_len
= (size_t) buildid_len_arg
;
2416 filename
= (const char *) data
;
2417 if (!IS_ABSOLUTE_PATH (filename
))
2419 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2422 make_cleanup (xfree
, abs
);
2423 abs
= ldirname (abs
);
2424 make_cleanup (xfree
, abs
);
2426 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2427 make_cleanup (xfree
, rel
);
2431 /* First try the file name given in the section. If that doesn't
2432 work, try to use the build-id instead. */
2433 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2434 if (dwz_bfd
!= NULL
)
2436 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2438 gdb_bfd_unref (dwz_bfd
);
2443 if (dwz_bfd
== NULL
)
2444 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2446 if (dwz_bfd
== NULL
)
2447 error (_("could not find '.gnu_debugaltlink' file for %s"),
2448 objfile_name (dwarf2_per_objfile
->objfile
));
2450 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2452 result
->dwz_bfd
= dwz_bfd
;
2454 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2456 do_cleanups (cleanup
);
2458 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2459 dwarf2_per_objfile
->dwz_file
= result
;
2463 /* DWARF quick_symbols_functions support. */
2465 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2466 unique line tables, so we maintain a separate table of all .debug_line
2467 derived entries to support the sharing.
2468 All the quick functions need is the list of file names. We discard the
2469 line_header when we're done and don't need to record it here. */
2470 struct quick_file_names
2472 /* The data used to construct the hash key. */
2473 struct stmt_list_hash hash
;
2475 /* The number of entries in file_names, real_names. */
2476 unsigned int num_file_names
;
2478 /* The file names from the line table, after being run through
2480 const char **file_names
;
2482 /* The file names from the line table after being run through
2483 gdb_realpath. These are computed lazily. */
2484 const char **real_names
;
2487 /* When using the index (and thus not using psymtabs), each CU has an
2488 object of this type. This is used to hold information needed by
2489 the various "quick" methods. */
2490 struct dwarf2_per_cu_quick_data
2492 /* The file table. This can be NULL if there was no file table
2493 or it's currently not read in.
2494 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2495 struct quick_file_names
*file_names
;
2497 /* The corresponding symbol table. This is NULL if symbols for this
2498 CU have not yet been read. */
2499 struct compunit_symtab
*compunit_symtab
;
2501 /* A temporary mark bit used when iterating over all CUs in
2502 expand_symtabs_matching. */
2503 unsigned int mark
: 1;
2505 /* True if we've tried to read the file table and found there isn't one.
2506 There will be no point in trying to read it again next time. */
2507 unsigned int no_file_data
: 1;
2510 /* Utility hash function for a stmt_list_hash. */
2513 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2517 if (stmt_list_hash
->dwo_unit
!= NULL
)
2518 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2519 v
+= stmt_list_hash
->line_offset
.sect_off
;
2523 /* Utility equality function for a stmt_list_hash. */
2526 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2527 const struct stmt_list_hash
*rhs
)
2529 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2531 if (lhs
->dwo_unit
!= NULL
2532 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2535 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2538 /* Hash function for a quick_file_names. */
2541 hash_file_name_entry (const void *e
)
2543 const struct quick_file_names
*file_data
= e
;
2545 return hash_stmt_list_entry (&file_data
->hash
);
2548 /* Equality function for a quick_file_names. */
2551 eq_file_name_entry (const void *a
, const void *b
)
2553 const struct quick_file_names
*ea
= a
;
2554 const struct quick_file_names
*eb
= b
;
2556 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2559 /* Delete function for a quick_file_names. */
2562 delete_file_name_entry (void *e
)
2564 struct quick_file_names
*file_data
= e
;
2567 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2569 xfree ((void*) file_data
->file_names
[i
]);
2570 if (file_data
->real_names
)
2571 xfree ((void*) file_data
->real_names
[i
]);
2574 /* The space for the struct itself lives on objfile_obstack,
2575 so we don't free it here. */
2578 /* Create a quick_file_names hash table. */
2581 create_quick_file_names_table (unsigned int nr_initial_entries
)
2583 return htab_create_alloc (nr_initial_entries
,
2584 hash_file_name_entry
, eq_file_name_entry
,
2585 delete_file_name_entry
, xcalloc
, xfree
);
2588 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2589 have to be created afterwards. You should call age_cached_comp_units after
2590 processing PER_CU->CU. dw2_setup must have been already called. */
2593 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2595 if (per_cu
->is_debug_types
)
2596 load_full_type_unit (per_cu
);
2598 load_full_comp_unit (per_cu
, language_minimal
);
2600 gdb_assert (per_cu
->cu
!= NULL
);
2602 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2605 /* Read in the symbols for PER_CU. */
2608 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2610 struct cleanup
*back_to
;
2612 /* Skip type_unit_groups, reading the type units they contain
2613 is handled elsewhere. */
2614 if (IS_TYPE_UNIT_GROUP (per_cu
))
2617 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2619 if (dwarf2_per_objfile
->using_index
2620 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2621 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2623 queue_comp_unit (per_cu
, language_minimal
);
2626 /* If we just loaded a CU from a DWO, and we're working with an index
2627 that may badly handle TUs, load all the TUs in that DWO as well.
2628 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2629 if (!per_cu
->is_debug_types
2630 && per_cu
->cu
->dwo_unit
!= NULL
2631 && dwarf2_per_objfile
->index_table
!= NULL
2632 && dwarf2_per_objfile
->index_table
->version
<= 7
2633 /* DWP files aren't supported yet. */
2634 && get_dwp_file () == NULL
)
2635 queue_and_load_all_dwo_tus (per_cu
);
2640 /* Age the cache, releasing compilation units that have not
2641 been used recently. */
2642 age_cached_comp_units ();
2644 do_cleanups (back_to
);
2647 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2648 the objfile from which this CU came. Returns the resulting symbol
2651 static struct compunit_symtab
*
2652 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2654 gdb_assert (dwarf2_per_objfile
->using_index
);
2655 if (!per_cu
->v
.quick
->compunit_symtab
)
2657 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2658 increment_reading_symtab ();
2659 dw2_do_instantiate_symtab (per_cu
);
2660 process_cu_includes ();
2661 do_cleanups (back_to
);
2664 return per_cu
->v
.quick
->compunit_symtab
;
2667 /* Return the CU/TU given its index.
2669 This is intended for loops like:
2671 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2672 + dwarf2_per_objfile->n_type_units); ++i)
2674 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2680 static struct dwarf2_per_cu_data
*
2681 dw2_get_cutu (int index
)
2683 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2685 index
-= dwarf2_per_objfile
->n_comp_units
;
2686 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2687 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2690 return dwarf2_per_objfile
->all_comp_units
[index
];
2693 /* Return the CU given its index.
2694 This differs from dw2_get_cutu in that it's for when you know INDEX
2697 static struct dwarf2_per_cu_data
*
2698 dw2_get_cu (int index
)
2700 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2702 return dwarf2_per_objfile
->all_comp_units
[index
];
2705 /* A helper for create_cus_from_index that handles a given list of
2709 create_cus_from_index_list (struct objfile
*objfile
,
2710 const gdb_byte
*cu_list
, offset_type n_elements
,
2711 struct dwarf2_section_info
*section
,
2717 for (i
= 0; i
< n_elements
; i
+= 2)
2719 struct dwarf2_per_cu_data
*the_cu
;
2720 ULONGEST offset
, length
;
2722 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2723 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2724 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2727 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2728 struct dwarf2_per_cu_data
);
2729 the_cu
->offset
.sect_off
= offset
;
2730 the_cu
->length
= length
;
2731 the_cu
->objfile
= objfile
;
2732 the_cu
->section
= section
;
2733 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2734 struct dwarf2_per_cu_quick_data
);
2735 the_cu
->is_dwz
= is_dwz
;
2736 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2740 /* Read the CU list from the mapped index, and use it to create all
2741 the CU objects for this objfile. */
2744 create_cus_from_index (struct objfile
*objfile
,
2745 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2746 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2748 struct dwz_file
*dwz
;
2750 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2751 dwarf2_per_objfile
->all_comp_units
2752 = obstack_alloc (&objfile
->objfile_obstack
,
2753 dwarf2_per_objfile
->n_comp_units
2754 * sizeof (struct dwarf2_per_cu_data
*));
2756 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2757 &dwarf2_per_objfile
->info
, 0, 0);
2759 if (dwz_elements
== 0)
2762 dwz
= dwarf2_get_dwz_file ();
2763 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2764 cu_list_elements
/ 2);
2767 /* Create the signatured type hash table from the index. */
2770 create_signatured_type_table_from_index (struct objfile
*objfile
,
2771 struct dwarf2_section_info
*section
,
2772 const gdb_byte
*bytes
,
2773 offset_type elements
)
2776 htab_t sig_types_hash
;
2778 dwarf2_per_objfile
->n_type_units
2779 = dwarf2_per_objfile
->n_allocated_type_units
2781 dwarf2_per_objfile
->all_type_units
2782 = xmalloc (dwarf2_per_objfile
->n_type_units
2783 * sizeof (struct signatured_type
*));
2785 sig_types_hash
= allocate_signatured_type_table (objfile
);
2787 for (i
= 0; i
< elements
; i
+= 3)
2789 struct signatured_type
*sig_type
;
2790 ULONGEST offset
, type_offset_in_tu
, signature
;
2793 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2794 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2795 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2797 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2800 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2801 struct signatured_type
);
2802 sig_type
->signature
= signature
;
2803 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2804 sig_type
->per_cu
.is_debug_types
= 1;
2805 sig_type
->per_cu
.section
= section
;
2806 sig_type
->per_cu
.offset
.sect_off
= offset
;
2807 sig_type
->per_cu
.objfile
= objfile
;
2808 sig_type
->per_cu
.v
.quick
2809 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2810 struct dwarf2_per_cu_quick_data
);
2812 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2815 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2818 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2821 /* Read the address map data from the mapped index, and use it to
2822 populate the objfile's psymtabs_addrmap. */
2825 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2827 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2828 const gdb_byte
*iter
, *end
;
2829 struct obstack temp_obstack
;
2830 struct addrmap
*mutable_map
;
2831 struct cleanup
*cleanup
;
2834 obstack_init (&temp_obstack
);
2835 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2836 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2838 iter
= index
->address_table
;
2839 end
= iter
+ index
->address_table_size
;
2841 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2845 ULONGEST hi
, lo
, cu_index
;
2846 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2848 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2850 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2855 complaint (&symfile_complaints
,
2856 _(".gdb_index address table has invalid range (%s - %s)"),
2857 hex_string (lo
), hex_string (hi
));
2861 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2863 complaint (&symfile_complaints
,
2864 _(".gdb_index address table has invalid CU number %u"),
2865 (unsigned) cu_index
);
2869 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2870 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2871 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2874 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2875 &objfile
->objfile_obstack
);
2876 do_cleanups (cleanup
);
2879 /* The hash function for strings in the mapped index. This is the same as
2880 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2881 implementation. This is necessary because the hash function is tied to the
2882 format of the mapped index file. The hash values do not have to match with
2885 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2888 mapped_index_string_hash (int index_version
, const void *p
)
2890 const unsigned char *str
= (const unsigned char *) p
;
2894 while ((c
= *str
++) != 0)
2896 if (index_version
>= 5)
2898 r
= r
* 67 + c
- 113;
2904 /* Find a slot in the mapped index INDEX for the object named NAME.
2905 If NAME is found, set *VEC_OUT to point to the CU vector in the
2906 constant pool and return 1. If NAME cannot be found, return 0. */
2909 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2910 offset_type
**vec_out
)
2912 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2914 offset_type slot
, step
;
2915 int (*cmp
) (const char *, const char *);
2917 if (current_language
->la_language
== language_cplus
2918 || current_language
->la_language
== language_java
2919 || current_language
->la_language
== language_fortran
)
2921 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2924 if (strchr (name
, '(') != NULL
)
2926 char *without_params
= cp_remove_params (name
);
2928 if (without_params
!= NULL
)
2930 make_cleanup (xfree
, without_params
);
2931 name
= without_params
;
2936 /* Index version 4 did not support case insensitive searches. But the
2937 indices for case insensitive languages are built in lowercase, therefore
2938 simulate our NAME being searched is also lowercased. */
2939 hash
= mapped_index_string_hash ((index
->version
== 4
2940 && case_sensitivity
== case_sensitive_off
2941 ? 5 : index
->version
),
2944 slot
= hash
& (index
->symbol_table_slots
- 1);
2945 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2946 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2950 /* Convert a slot number to an offset into the table. */
2951 offset_type i
= 2 * slot
;
2953 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2955 do_cleanups (back_to
);
2959 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2960 if (!cmp (name
, str
))
2962 *vec_out
= (offset_type
*) (index
->constant_pool
2963 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2964 do_cleanups (back_to
);
2968 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2972 /* A helper function that reads the .gdb_index from SECTION and fills
2973 in MAP. FILENAME is the name of the file containing the section;
2974 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2975 ok to use deprecated sections.
2977 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2978 out parameters that are filled in with information about the CU and
2979 TU lists in the section.
2981 Returns 1 if all went well, 0 otherwise. */
2984 read_index_from_section (struct objfile
*objfile
,
2985 const char *filename
,
2987 struct dwarf2_section_info
*section
,
2988 struct mapped_index
*map
,
2989 const gdb_byte
**cu_list
,
2990 offset_type
*cu_list_elements
,
2991 const gdb_byte
**types_list
,
2992 offset_type
*types_list_elements
)
2994 const gdb_byte
*addr
;
2995 offset_type version
;
2996 offset_type
*metadata
;
2999 if (dwarf2_section_empty_p (section
))
3002 /* Older elfutils strip versions could keep the section in the main
3003 executable while splitting it for the separate debug info file. */
3004 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3007 dwarf2_read_section (objfile
, section
);
3009 addr
= section
->buffer
;
3010 /* Version check. */
3011 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3012 /* Versions earlier than 3 emitted every copy of a psymbol. This
3013 causes the index to behave very poorly for certain requests. Version 3
3014 contained incomplete addrmap. So, it seems better to just ignore such
3018 static int warning_printed
= 0;
3019 if (!warning_printed
)
3021 warning (_("Skipping obsolete .gdb_index section in %s."),
3023 warning_printed
= 1;
3027 /* Index version 4 uses a different hash function than index version
3030 Versions earlier than 6 did not emit psymbols for inlined
3031 functions. Using these files will cause GDB not to be able to
3032 set breakpoints on inlined functions by name, so we ignore these
3033 indices unless the user has done
3034 "set use-deprecated-index-sections on". */
3035 if (version
< 6 && !deprecated_ok
)
3037 static int warning_printed
= 0;
3038 if (!warning_printed
)
3041 Skipping deprecated .gdb_index section in %s.\n\
3042 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3043 to use the section anyway."),
3045 warning_printed
= 1;
3049 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3050 of the TU (for symbols coming from TUs),
3051 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3052 Plus gold-generated indices can have duplicate entries for global symbols,
3053 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3054 These are just performance bugs, and we can't distinguish gdb-generated
3055 indices from gold-generated ones, so issue no warning here. */
3057 /* Indexes with higher version than the one supported by GDB may be no
3058 longer backward compatible. */
3062 map
->version
= version
;
3063 map
->total_size
= section
->size
;
3065 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3068 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3069 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3073 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3074 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3075 - MAYBE_SWAP (metadata
[i
]))
3079 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3080 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3081 - MAYBE_SWAP (metadata
[i
]));
3084 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3085 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3086 - MAYBE_SWAP (metadata
[i
]))
3087 / (2 * sizeof (offset_type
)));
3090 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3096 /* Read the index file. If everything went ok, initialize the "quick"
3097 elements of all the CUs and return 1. Otherwise, return 0. */
3100 dwarf2_read_index (struct objfile
*objfile
)
3102 struct mapped_index local_map
, *map
;
3103 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3104 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3105 struct dwz_file
*dwz
;
3107 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3108 use_deprecated_index_sections
,
3109 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3110 &cu_list
, &cu_list_elements
,
3111 &types_list
, &types_list_elements
))
3114 /* Don't use the index if it's empty. */
3115 if (local_map
.symbol_table_slots
== 0)
3118 /* If there is a .dwz file, read it so we can get its CU list as
3120 dwz
= dwarf2_get_dwz_file ();
3123 struct mapped_index dwz_map
;
3124 const gdb_byte
*dwz_types_ignore
;
3125 offset_type dwz_types_elements_ignore
;
3127 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3129 &dwz
->gdb_index
, &dwz_map
,
3130 &dwz_list
, &dwz_list_elements
,
3132 &dwz_types_elements_ignore
))
3134 warning (_("could not read '.gdb_index' section from %s; skipping"),
3135 bfd_get_filename (dwz
->dwz_bfd
));
3140 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3143 if (types_list_elements
)
3145 struct dwarf2_section_info
*section
;
3147 /* We can only handle a single .debug_types when we have an
3149 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3152 section
= VEC_index (dwarf2_section_info_def
,
3153 dwarf2_per_objfile
->types
, 0);
3155 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3156 types_list_elements
);
3159 create_addrmap_from_index (objfile
, &local_map
);
3161 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3164 dwarf2_per_objfile
->index_table
= map
;
3165 dwarf2_per_objfile
->using_index
= 1;
3166 dwarf2_per_objfile
->quick_file_names_table
=
3167 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3172 /* A helper for the "quick" functions which sets the global
3173 dwarf2_per_objfile according to OBJFILE. */
3176 dw2_setup (struct objfile
*objfile
)
3178 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3179 gdb_assert (dwarf2_per_objfile
);
3182 /* die_reader_func for dw2_get_file_names. */
3185 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3186 const gdb_byte
*info_ptr
,
3187 struct die_info
*comp_unit_die
,
3191 struct dwarf2_cu
*cu
= reader
->cu
;
3192 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3193 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3194 struct dwarf2_per_cu_data
*lh_cu
;
3195 struct line_header
*lh
;
3196 struct attribute
*attr
;
3198 const char *name
, *comp_dir
;
3200 struct quick_file_names
*qfn
;
3201 unsigned int line_offset
;
3203 gdb_assert (! this_cu
->is_debug_types
);
3205 /* Our callers never want to match partial units -- instead they
3206 will match the enclosing full CU. */
3207 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3209 this_cu
->v
.quick
->no_file_data
= 1;
3218 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3221 struct quick_file_names find_entry
;
3223 line_offset
= DW_UNSND (attr
);
3225 /* We may have already read in this line header (TU line header sharing).
3226 If we have we're done. */
3227 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3228 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3229 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3230 &find_entry
, INSERT
);
3233 lh_cu
->v
.quick
->file_names
= *slot
;
3237 lh
= dwarf_decode_line_header (line_offset
, cu
);
3241 lh_cu
->v
.quick
->no_file_data
= 1;
3245 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3246 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3247 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3248 gdb_assert (slot
!= NULL
);
3251 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3253 qfn
->num_file_names
= lh
->num_file_names
;
3254 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3255 lh
->num_file_names
* sizeof (char *));
3256 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3257 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3258 qfn
->real_names
= NULL
;
3260 free_line_header (lh
);
3262 lh_cu
->v
.quick
->file_names
= qfn
;
3265 /* A helper for the "quick" functions which attempts to read the line
3266 table for THIS_CU. */
3268 static struct quick_file_names
*
3269 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3271 /* This should never be called for TUs. */
3272 gdb_assert (! this_cu
->is_debug_types
);
3273 /* Nor type unit groups. */
3274 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3276 if (this_cu
->v
.quick
->file_names
!= NULL
)
3277 return this_cu
->v
.quick
->file_names
;
3278 /* If we know there is no line data, no point in looking again. */
3279 if (this_cu
->v
.quick
->no_file_data
)
3282 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3284 if (this_cu
->v
.quick
->no_file_data
)
3286 return this_cu
->v
.quick
->file_names
;
3289 /* A helper for the "quick" functions which computes and caches the
3290 real path for a given file name from the line table. */
3293 dw2_get_real_path (struct objfile
*objfile
,
3294 struct quick_file_names
*qfn
, int index
)
3296 if (qfn
->real_names
== NULL
)
3297 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3298 qfn
->num_file_names
, const char *);
3300 if (qfn
->real_names
[index
] == NULL
)
3301 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3303 return qfn
->real_names
[index
];
3306 static struct symtab
*
3307 dw2_find_last_source_symtab (struct objfile
*objfile
)
3309 struct compunit_symtab
*cust
;
3312 dw2_setup (objfile
);
3313 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3314 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3317 return compunit_primary_filetab (cust
);
3320 /* Traversal function for dw2_forget_cached_source_info. */
3323 dw2_free_cached_file_names (void **slot
, void *info
)
3325 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3327 if (file_data
->real_names
)
3331 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3333 xfree ((void*) file_data
->real_names
[i
]);
3334 file_data
->real_names
[i
] = NULL
;
3342 dw2_forget_cached_source_info (struct objfile
*objfile
)
3344 dw2_setup (objfile
);
3346 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3347 dw2_free_cached_file_names
, NULL
);
3350 /* Helper function for dw2_map_symtabs_matching_filename that expands
3351 the symtabs and calls the iterator. */
3354 dw2_map_expand_apply (struct objfile
*objfile
,
3355 struct dwarf2_per_cu_data
*per_cu
,
3356 const char *name
, const char *real_path
,
3357 int (*callback
) (struct symtab
*, void *),
3360 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3362 /* Don't visit already-expanded CUs. */
3363 if (per_cu
->v
.quick
->compunit_symtab
)
3366 /* This may expand more than one symtab, and we want to iterate over
3368 dw2_instantiate_symtab (per_cu
);
3370 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3371 objfile
->compunit_symtabs
, last_made
);
3374 /* Implementation of the map_symtabs_matching_filename method. */
3377 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3378 const char *real_path
,
3379 int (*callback
) (struct symtab
*, void *),
3383 const char *name_basename
= lbasename (name
);
3385 dw2_setup (objfile
);
3387 /* The rule is CUs specify all the files, including those used by
3388 any TU, so there's no need to scan TUs here. */
3390 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3393 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3394 struct quick_file_names
*file_data
;
3396 /* We only need to look at symtabs not already expanded. */
3397 if (per_cu
->v
.quick
->compunit_symtab
)
3400 file_data
= dw2_get_file_names (per_cu
);
3401 if (file_data
== NULL
)
3404 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3406 const char *this_name
= file_data
->file_names
[j
];
3407 const char *this_real_name
;
3409 if (compare_filenames_for_search (this_name
, name
))
3411 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3417 /* Before we invoke realpath, which can get expensive when many
3418 files are involved, do a quick comparison of the basenames. */
3419 if (! basenames_may_differ
3420 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3423 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3424 if (compare_filenames_for_search (this_real_name
, name
))
3426 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3432 if (real_path
!= NULL
)
3434 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3435 gdb_assert (IS_ABSOLUTE_PATH (name
));
3436 if (this_real_name
!= NULL
3437 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3439 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3451 /* Struct used to manage iterating over all CUs looking for a symbol. */
3453 struct dw2_symtab_iterator
3455 /* The internalized form of .gdb_index. */
3456 struct mapped_index
*index
;
3457 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3458 int want_specific_block
;
3459 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3460 Unused if !WANT_SPECIFIC_BLOCK. */
3462 /* The kind of symbol we're looking for. */
3464 /* The list of CUs from the index entry of the symbol,
3465 or NULL if not found. */
3467 /* The next element in VEC to look at. */
3469 /* The number of elements in VEC, or zero if there is no match. */
3471 /* Have we seen a global version of the symbol?
3472 If so we can ignore all further global instances.
3473 This is to work around gold/15646, inefficient gold-generated
3478 /* Initialize the index symtab iterator ITER.
3479 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3480 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3483 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3484 struct mapped_index
*index
,
3485 int want_specific_block
,
3490 iter
->index
= index
;
3491 iter
->want_specific_block
= want_specific_block
;
3492 iter
->block_index
= block_index
;
3493 iter
->domain
= domain
;
3495 iter
->global_seen
= 0;
3497 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3498 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3506 /* Return the next matching CU or NULL if there are no more. */
3508 static struct dwarf2_per_cu_data
*
3509 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3511 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3513 offset_type cu_index_and_attrs
=
3514 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3515 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3516 struct dwarf2_per_cu_data
*per_cu
;
3517 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3518 /* This value is only valid for index versions >= 7. */
3519 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3520 gdb_index_symbol_kind symbol_kind
=
3521 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3522 /* Only check the symbol attributes if they're present.
3523 Indices prior to version 7 don't record them,
3524 and indices >= 7 may elide them for certain symbols
3525 (gold does this). */
3527 (iter
->index
->version
>= 7
3528 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3530 /* Don't crash on bad data. */
3531 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3532 + dwarf2_per_objfile
->n_type_units
))
3534 complaint (&symfile_complaints
,
3535 _(".gdb_index entry has bad CU index"
3537 objfile_name (dwarf2_per_objfile
->objfile
));
3541 per_cu
= dw2_get_cutu (cu_index
);
3543 /* Skip if already read in. */
3544 if (per_cu
->v
.quick
->compunit_symtab
)
3547 /* Check static vs global. */
3550 if (iter
->want_specific_block
3551 && want_static
!= is_static
)
3553 /* Work around gold/15646. */
3554 if (!is_static
&& iter
->global_seen
)
3557 iter
->global_seen
= 1;
3560 /* Only check the symbol's kind if it has one. */
3563 switch (iter
->domain
)
3566 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3567 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3568 /* Some types are also in VAR_DOMAIN. */
3569 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3573 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3577 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3592 static struct compunit_symtab
*
3593 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3594 const char *name
, domain_enum domain
)
3596 struct compunit_symtab
*stab_best
= NULL
;
3597 struct mapped_index
*index
;
3599 dw2_setup (objfile
);
3601 index
= dwarf2_per_objfile
->index_table
;
3603 /* index is NULL if OBJF_READNOW. */
3606 struct dw2_symtab_iterator iter
;
3607 struct dwarf2_per_cu_data
*per_cu
;
3609 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3611 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3613 struct symbol
*sym
= NULL
;
3614 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3615 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3616 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3618 /* Some caution must be observed with overloaded functions
3619 and methods, since the index will not contain any overload
3620 information (but NAME might contain it). */
3621 sym
= block_lookup_symbol (block
, name
, domain
);
3623 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3625 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3631 /* Keep looking through other CUs. */
3639 dw2_print_stats (struct objfile
*objfile
)
3641 int i
, total
, count
;
3643 dw2_setup (objfile
);
3644 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3646 for (i
= 0; i
< total
; ++i
)
3648 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3650 if (!per_cu
->v
.quick
->compunit_symtab
)
3653 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3654 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3657 /* This dumps minimal information about the index.
3658 It is called via "mt print objfiles".
3659 One use is to verify .gdb_index has been loaded by the
3660 gdb.dwarf2/gdb-index.exp testcase. */
3663 dw2_dump (struct objfile
*objfile
)
3665 dw2_setup (objfile
);
3666 gdb_assert (dwarf2_per_objfile
->using_index
);
3667 printf_filtered (".gdb_index:");
3668 if (dwarf2_per_objfile
->index_table
!= NULL
)
3670 printf_filtered (" version %d\n",
3671 dwarf2_per_objfile
->index_table
->version
);
3674 printf_filtered (" faked for \"readnow\"\n");
3675 printf_filtered ("\n");
3679 dw2_relocate (struct objfile
*objfile
,
3680 const struct section_offsets
*new_offsets
,
3681 const struct section_offsets
*delta
)
3683 /* There's nothing to relocate here. */
3687 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3688 const char *func_name
)
3690 struct mapped_index
*index
;
3692 dw2_setup (objfile
);
3694 index
= dwarf2_per_objfile
->index_table
;
3696 /* index is NULL if OBJF_READNOW. */
3699 struct dw2_symtab_iterator iter
;
3700 struct dwarf2_per_cu_data
*per_cu
;
3702 /* Note: It doesn't matter what we pass for block_index here. */
3703 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3706 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3707 dw2_instantiate_symtab (per_cu
);
3712 dw2_expand_all_symtabs (struct objfile
*objfile
)
3716 dw2_setup (objfile
);
3718 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3719 + dwarf2_per_objfile
->n_type_units
); ++i
)
3721 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3723 dw2_instantiate_symtab (per_cu
);
3728 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3729 const char *fullname
)
3733 dw2_setup (objfile
);
3735 /* We don't need to consider type units here.
3736 This is only called for examining code, e.g. expand_line_sal.
3737 There can be an order of magnitude (or more) more type units
3738 than comp units, and we avoid them if we can. */
3740 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3743 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3744 struct quick_file_names
*file_data
;
3746 /* We only need to look at symtabs not already expanded. */
3747 if (per_cu
->v
.quick
->compunit_symtab
)
3750 file_data
= dw2_get_file_names (per_cu
);
3751 if (file_data
== NULL
)
3754 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3756 const char *this_fullname
= file_data
->file_names
[j
];
3758 if (filename_cmp (this_fullname
, fullname
) == 0)
3760 dw2_instantiate_symtab (per_cu
);
3768 dw2_map_matching_symbols (struct objfile
*objfile
,
3769 const char * name
, domain_enum
namespace,
3771 int (*callback
) (struct block
*,
3772 struct symbol
*, void *),
3773 void *data
, symbol_compare_ftype
*match
,
3774 symbol_compare_ftype
*ordered_compare
)
3776 /* Currently unimplemented; used for Ada. The function can be called if the
3777 current language is Ada for a non-Ada objfile using GNU index. As Ada
3778 does not look for non-Ada symbols this function should just return. */
3782 dw2_expand_symtabs_matching
3783 (struct objfile
*objfile
,
3784 expand_symtabs_file_matcher_ftype
*file_matcher
,
3785 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3786 enum search_domain kind
,
3791 struct mapped_index
*index
;
3793 dw2_setup (objfile
);
3795 /* index_table is NULL if OBJF_READNOW. */
3796 if (!dwarf2_per_objfile
->index_table
)
3798 index
= dwarf2_per_objfile
->index_table
;
3800 if (file_matcher
!= NULL
)
3802 struct cleanup
*cleanup
;
3803 htab_t visited_found
, visited_not_found
;
3805 visited_found
= htab_create_alloc (10,
3806 htab_hash_pointer
, htab_eq_pointer
,
3807 NULL
, xcalloc
, xfree
);
3808 cleanup
= make_cleanup_htab_delete (visited_found
);
3809 visited_not_found
= htab_create_alloc (10,
3810 htab_hash_pointer
, htab_eq_pointer
,
3811 NULL
, xcalloc
, xfree
);
3812 make_cleanup_htab_delete (visited_not_found
);
3814 /* The rule is CUs specify all the files, including those used by
3815 any TU, so there's no need to scan TUs here. */
3817 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3820 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3821 struct quick_file_names
*file_data
;
3824 per_cu
->v
.quick
->mark
= 0;
3826 /* We only need to look at symtabs not already expanded. */
3827 if (per_cu
->v
.quick
->compunit_symtab
)
3830 file_data
= dw2_get_file_names (per_cu
);
3831 if (file_data
== NULL
)
3834 if (htab_find (visited_not_found
, file_data
) != NULL
)
3836 else if (htab_find (visited_found
, file_data
) != NULL
)
3838 per_cu
->v
.quick
->mark
= 1;
3842 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3844 const char *this_real_name
;
3846 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3848 per_cu
->v
.quick
->mark
= 1;
3852 /* Before we invoke realpath, which can get expensive when many
3853 files are involved, do a quick comparison of the basenames. */
3854 if (!basenames_may_differ
3855 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3859 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3860 if (file_matcher (this_real_name
, data
, 0))
3862 per_cu
->v
.quick
->mark
= 1;
3867 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3869 : visited_not_found
,
3874 do_cleanups (cleanup
);
3877 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3879 offset_type idx
= 2 * iter
;
3881 offset_type
*vec
, vec_len
, vec_idx
;
3882 int global_seen
= 0;
3884 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3887 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3889 if (! (*symbol_matcher
) (name
, data
))
3892 /* The name was matched, now expand corresponding CUs that were
3894 vec
= (offset_type
*) (index
->constant_pool
3895 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3896 vec_len
= MAYBE_SWAP (vec
[0]);
3897 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3899 struct dwarf2_per_cu_data
*per_cu
;
3900 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3901 /* This value is only valid for index versions >= 7. */
3902 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3903 gdb_index_symbol_kind symbol_kind
=
3904 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3905 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3906 /* Only check the symbol attributes if they're present.
3907 Indices prior to version 7 don't record them,
3908 and indices >= 7 may elide them for certain symbols
3909 (gold does this). */
3911 (index
->version
>= 7
3912 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3914 /* Work around gold/15646. */
3917 if (!is_static
&& global_seen
)
3923 /* Only check the symbol's kind if it has one. */
3928 case VARIABLES_DOMAIN
:
3929 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3932 case FUNCTIONS_DOMAIN
:
3933 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3937 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3945 /* Don't crash on bad data. */
3946 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3947 + dwarf2_per_objfile
->n_type_units
))
3949 complaint (&symfile_complaints
,
3950 _(".gdb_index entry has bad CU index"
3951 " [in module %s]"), objfile_name (objfile
));
3955 per_cu
= dw2_get_cutu (cu_index
);
3956 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3957 dw2_instantiate_symtab (per_cu
);
3962 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
3965 static struct compunit_symtab
*
3966 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
3971 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
3972 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
3975 if (cust
->includes
== NULL
)
3978 for (i
= 0; cust
->includes
[i
]; ++i
)
3980 struct compunit_symtab
*s
= cust
->includes
[i
];
3982 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
3990 static struct compunit_symtab
*
3991 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
3992 struct bound_minimal_symbol msymbol
,
3994 struct obj_section
*section
,
3997 struct dwarf2_per_cu_data
*data
;
3998 struct compunit_symtab
*result
;
4000 dw2_setup (objfile
);
4002 if (!objfile
->psymtabs_addrmap
)
4005 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4009 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4010 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4011 paddress (get_objfile_arch (objfile
), pc
));
4014 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4016 gdb_assert (result
!= NULL
);
4021 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4022 void *data
, int need_fullname
)
4025 struct cleanup
*cleanup
;
4026 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4027 NULL
, xcalloc
, xfree
);
4029 cleanup
= make_cleanup_htab_delete (visited
);
4030 dw2_setup (objfile
);
4032 /* The rule is CUs specify all the files, including those used by
4033 any TU, so there's no need to scan TUs here.
4034 We can ignore file names coming from already-expanded CUs. */
4036 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4038 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4040 if (per_cu
->v
.quick
->compunit_symtab
)
4042 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4045 *slot
= per_cu
->v
.quick
->file_names
;
4049 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4052 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4053 struct quick_file_names
*file_data
;
4056 /* We only need to look at symtabs not already expanded. */
4057 if (per_cu
->v
.quick
->compunit_symtab
)
4060 file_data
= dw2_get_file_names (per_cu
);
4061 if (file_data
== NULL
)
4064 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4067 /* Already visited. */
4072 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4074 const char *this_real_name
;
4077 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4079 this_real_name
= NULL
;
4080 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4084 do_cleanups (cleanup
);
4088 dw2_has_symbols (struct objfile
*objfile
)
4093 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4096 dw2_find_last_source_symtab
,
4097 dw2_forget_cached_source_info
,
4098 dw2_map_symtabs_matching_filename
,
4103 dw2_expand_symtabs_for_function
,
4104 dw2_expand_all_symtabs
,
4105 dw2_expand_symtabs_with_fullname
,
4106 dw2_map_matching_symbols
,
4107 dw2_expand_symtabs_matching
,
4108 dw2_find_pc_sect_compunit_symtab
,
4109 dw2_map_symbol_filenames
4112 /* Initialize for reading DWARF for this objfile. Return 0 if this
4113 file will use psymtabs, or 1 if using the GNU index. */
4116 dwarf2_initialize_objfile (struct objfile
*objfile
)
4118 /* If we're about to read full symbols, don't bother with the
4119 indices. In this case we also don't care if some other debug
4120 format is making psymtabs, because they are all about to be
4122 if ((objfile
->flags
& OBJF_READNOW
))
4126 dwarf2_per_objfile
->using_index
= 1;
4127 create_all_comp_units (objfile
);
4128 create_all_type_units (objfile
);
4129 dwarf2_per_objfile
->quick_file_names_table
=
4130 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4132 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4133 + dwarf2_per_objfile
->n_type_units
); ++i
)
4135 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4137 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4138 struct dwarf2_per_cu_quick_data
);
4141 /* Return 1 so that gdb sees the "quick" functions. However,
4142 these functions will be no-ops because we will have expanded
4147 if (dwarf2_read_index (objfile
))
4155 /* Build a partial symbol table. */
4158 dwarf2_build_psymtabs (struct objfile
*objfile
)
4160 volatile struct gdb_exception except
;
4162 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4164 init_psymbol_list (objfile
, 1024);
4167 TRY_CATCH (except
, RETURN_MASK_ERROR
)
4169 /* This isn't really ideal: all the data we allocate on the
4170 objfile's obstack is still uselessly kept around. However,
4171 freeing it seems unsafe. */
4172 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4174 dwarf2_build_psymtabs_hard (objfile
);
4175 discard_cleanups (cleanups
);
4177 if (except
.reason
< 0)
4178 exception_print (gdb_stderr
, except
);
4181 /* Return the total length of the CU described by HEADER. */
4184 get_cu_length (const struct comp_unit_head
*header
)
4186 return header
->initial_length_size
+ header
->length
;
4189 /* Return TRUE if OFFSET is within CU_HEADER. */
4192 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4194 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4195 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4197 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4200 /* Find the base address of the compilation unit for range lists and
4201 location lists. It will normally be specified by DW_AT_low_pc.
4202 In DWARF-3 draft 4, the base address could be overridden by
4203 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4204 compilation units with discontinuous ranges. */
4207 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4209 struct attribute
*attr
;
4212 cu
->base_address
= 0;
4214 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4217 cu
->base_address
= attr_value_as_address (attr
);
4222 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4225 cu
->base_address
= attr_value_as_address (attr
);
4231 /* Read in the comp unit header information from the debug_info at info_ptr.
4232 NOTE: This leaves members offset, first_die_offset to be filled in
4235 static const gdb_byte
*
4236 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4237 const gdb_byte
*info_ptr
, bfd
*abfd
)
4240 unsigned int bytes_read
;
4242 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4243 cu_header
->initial_length_size
= bytes_read
;
4244 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4245 info_ptr
+= bytes_read
;
4246 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4248 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4250 info_ptr
+= bytes_read
;
4251 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4253 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4254 if (signed_addr
< 0)
4255 internal_error (__FILE__
, __LINE__
,
4256 _("read_comp_unit_head: dwarf from non elf file"));
4257 cu_header
->signed_addr_p
= signed_addr
;
4262 /* Helper function that returns the proper abbrev section for
4265 static struct dwarf2_section_info
*
4266 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4268 struct dwarf2_section_info
*abbrev
;
4270 if (this_cu
->is_dwz
)
4271 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4273 abbrev
= &dwarf2_per_objfile
->abbrev
;
4278 /* Subroutine of read_and_check_comp_unit_head and
4279 read_and_check_type_unit_head to simplify them.
4280 Perform various error checking on the header. */
4283 error_check_comp_unit_head (struct comp_unit_head
*header
,
4284 struct dwarf2_section_info
*section
,
4285 struct dwarf2_section_info
*abbrev_section
)
4287 bfd
*abfd
= get_section_bfd_owner (section
);
4288 const char *filename
= get_section_file_name (section
);
4290 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4291 error (_("Dwarf Error: wrong version in compilation unit header "
4292 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4295 if (header
->abbrev_offset
.sect_off
4296 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4297 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4298 "(offset 0x%lx + 6) [in module %s]"),
4299 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4302 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4303 avoid potential 32-bit overflow. */
4304 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4306 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4307 "(offset 0x%lx + 0) [in module %s]"),
4308 (long) header
->length
, (long) header
->offset
.sect_off
,
4312 /* Read in a CU/TU header and perform some basic error checking.
4313 The contents of the header are stored in HEADER.
4314 The result is a pointer to the start of the first DIE. */
4316 static const gdb_byte
*
4317 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4318 struct dwarf2_section_info
*section
,
4319 struct dwarf2_section_info
*abbrev_section
,
4320 const gdb_byte
*info_ptr
,
4321 int is_debug_types_section
)
4323 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4324 bfd
*abfd
= get_section_bfd_owner (section
);
4326 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4328 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4330 /* If we're reading a type unit, skip over the signature and
4331 type_offset fields. */
4332 if (is_debug_types_section
)
4333 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4335 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4337 error_check_comp_unit_head (header
, section
, abbrev_section
);
4342 /* Read in the types comp unit header information from .debug_types entry at
4343 types_ptr. The result is a pointer to one past the end of the header. */
4345 static const gdb_byte
*
4346 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4347 struct dwarf2_section_info
*section
,
4348 struct dwarf2_section_info
*abbrev_section
,
4349 const gdb_byte
*info_ptr
,
4350 ULONGEST
*signature
,
4351 cu_offset
*type_offset_in_tu
)
4353 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4354 bfd
*abfd
= get_section_bfd_owner (section
);
4356 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4358 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4360 /* If we're reading a type unit, skip over the signature and
4361 type_offset fields. */
4362 if (signature
!= NULL
)
4363 *signature
= read_8_bytes (abfd
, info_ptr
);
4365 if (type_offset_in_tu
!= NULL
)
4366 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4367 header
->offset_size
);
4368 info_ptr
+= header
->offset_size
;
4370 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4372 error_check_comp_unit_head (header
, section
, abbrev_section
);
4377 /* Fetch the abbreviation table offset from a comp or type unit header. */
4380 read_abbrev_offset (struct dwarf2_section_info
*section
,
4383 bfd
*abfd
= get_section_bfd_owner (section
);
4384 const gdb_byte
*info_ptr
;
4385 unsigned int length
, initial_length_size
, offset_size
;
4386 sect_offset abbrev_offset
;
4388 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4389 info_ptr
= section
->buffer
+ offset
.sect_off
;
4390 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4391 offset_size
= initial_length_size
== 4 ? 4 : 8;
4392 info_ptr
+= initial_length_size
+ 2 /*version*/;
4393 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4394 return abbrev_offset
;
4397 /* Allocate a new partial symtab for file named NAME and mark this new
4398 partial symtab as being an include of PST. */
4401 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4402 struct objfile
*objfile
)
4404 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4406 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4408 /* It shares objfile->objfile_obstack. */
4409 subpst
->dirname
= pst
->dirname
;
4412 subpst
->section_offsets
= pst
->section_offsets
;
4413 subpst
->textlow
= 0;
4414 subpst
->texthigh
= 0;
4416 subpst
->dependencies
= (struct partial_symtab
**)
4417 obstack_alloc (&objfile
->objfile_obstack
,
4418 sizeof (struct partial_symtab
*));
4419 subpst
->dependencies
[0] = pst
;
4420 subpst
->number_of_dependencies
= 1;
4422 subpst
->globals_offset
= 0;
4423 subpst
->n_global_syms
= 0;
4424 subpst
->statics_offset
= 0;
4425 subpst
->n_static_syms
= 0;
4426 subpst
->compunit_symtab
= NULL
;
4427 subpst
->read_symtab
= pst
->read_symtab
;
4430 /* No private part is necessary for include psymtabs. This property
4431 can be used to differentiate between such include psymtabs and
4432 the regular ones. */
4433 subpst
->read_symtab_private
= NULL
;
4436 /* Read the Line Number Program data and extract the list of files
4437 included by the source file represented by PST. Build an include
4438 partial symtab for each of these included files. */
4441 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4442 struct die_info
*die
,
4443 struct partial_symtab
*pst
)
4445 struct line_header
*lh
= NULL
;
4446 struct attribute
*attr
;
4448 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4450 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4452 return; /* No linetable, so no includes. */
4454 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4455 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
);
4457 free_line_header (lh
);
4461 hash_signatured_type (const void *item
)
4463 const struct signatured_type
*sig_type
= item
;
4465 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4466 return sig_type
->signature
;
4470 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4472 const struct signatured_type
*lhs
= item_lhs
;
4473 const struct signatured_type
*rhs
= item_rhs
;
4475 return lhs
->signature
== rhs
->signature
;
4478 /* Allocate a hash table for signatured types. */
4481 allocate_signatured_type_table (struct objfile
*objfile
)
4483 return htab_create_alloc_ex (41,
4484 hash_signatured_type
,
4487 &objfile
->objfile_obstack
,
4488 hashtab_obstack_allocate
,
4489 dummy_obstack_deallocate
);
4492 /* A helper function to add a signatured type CU to a table. */
4495 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4497 struct signatured_type
*sigt
= *slot
;
4498 struct signatured_type
***datap
= datum
;
4506 /* Create the hash table of all entries in the .debug_types
4507 (or .debug_types.dwo) section(s).
4508 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4509 otherwise it is NULL.
4511 The result is a pointer to the hash table or NULL if there are no types.
4513 Note: This function processes DWO files only, not DWP files. */
4516 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4517 VEC (dwarf2_section_info_def
) *types
)
4519 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4520 htab_t types_htab
= NULL
;
4522 struct dwarf2_section_info
*section
;
4523 struct dwarf2_section_info
*abbrev_section
;
4525 if (VEC_empty (dwarf2_section_info_def
, types
))
4528 abbrev_section
= (dwo_file
!= NULL
4529 ? &dwo_file
->sections
.abbrev
4530 : &dwarf2_per_objfile
->abbrev
);
4532 if (dwarf2_read_debug
)
4533 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4534 dwo_file
? ".dwo" : "",
4535 get_section_file_name (abbrev_section
));
4538 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4542 const gdb_byte
*info_ptr
, *end_ptr
;
4544 dwarf2_read_section (objfile
, section
);
4545 info_ptr
= section
->buffer
;
4547 if (info_ptr
== NULL
)
4550 /* We can't set abfd until now because the section may be empty or
4551 not present, in which case the bfd is unknown. */
4552 abfd
= get_section_bfd_owner (section
);
4554 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4555 because we don't need to read any dies: the signature is in the
4558 end_ptr
= info_ptr
+ section
->size
;
4559 while (info_ptr
< end_ptr
)
4562 cu_offset type_offset_in_tu
;
4564 struct signatured_type
*sig_type
;
4565 struct dwo_unit
*dwo_tu
;
4567 const gdb_byte
*ptr
= info_ptr
;
4568 struct comp_unit_head header
;
4569 unsigned int length
;
4571 offset
.sect_off
= ptr
- section
->buffer
;
4573 /* We need to read the type's signature in order to build the hash
4574 table, but we don't need anything else just yet. */
4576 ptr
= read_and_check_type_unit_head (&header
, section
,
4577 abbrev_section
, ptr
,
4578 &signature
, &type_offset_in_tu
);
4580 length
= get_cu_length (&header
);
4582 /* Skip dummy type units. */
4583 if (ptr
>= info_ptr
+ length
4584 || peek_abbrev_code (abfd
, ptr
) == 0)
4590 if (types_htab
== NULL
)
4593 types_htab
= allocate_dwo_unit_table (objfile
);
4595 types_htab
= allocate_signatured_type_table (objfile
);
4601 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4603 dwo_tu
->dwo_file
= dwo_file
;
4604 dwo_tu
->signature
= signature
;
4605 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4606 dwo_tu
->section
= section
;
4607 dwo_tu
->offset
= offset
;
4608 dwo_tu
->length
= length
;
4612 /* N.B.: type_offset is not usable if this type uses a DWO file.
4613 The real type_offset is in the DWO file. */
4615 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4616 struct signatured_type
);
4617 sig_type
->signature
= signature
;
4618 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4619 sig_type
->per_cu
.objfile
= objfile
;
4620 sig_type
->per_cu
.is_debug_types
= 1;
4621 sig_type
->per_cu
.section
= section
;
4622 sig_type
->per_cu
.offset
= offset
;
4623 sig_type
->per_cu
.length
= length
;
4626 slot
= htab_find_slot (types_htab
,
4627 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4629 gdb_assert (slot
!= NULL
);
4632 sect_offset dup_offset
;
4636 const struct dwo_unit
*dup_tu
= *slot
;
4638 dup_offset
= dup_tu
->offset
;
4642 const struct signatured_type
*dup_tu
= *slot
;
4644 dup_offset
= dup_tu
->per_cu
.offset
;
4647 complaint (&symfile_complaints
,
4648 _("debug type entry at offset 0x%x is duplicate to"
4649 " the entry at offset 0x%x, signature %s"),
4650 offset
.sect_off
, dup_offset
.sect_off
,
4651 hex_string (signature
));
4653 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4655 if (dwarf2_read_debug
> 1)
4656 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4658 hex_string (signature
));
4667 /* Create the hash table of all entries in the .debug_types section,
4668 and initialize all_type_units.
4669 The result is zero if there is an error (e.g. missing .debug_types section),
4670 otherwise non-zero. */
4673 create_all_type_units (struct objfile
*objfile
)
4676 struct signatured_type
**iter
;
4678 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4679 if (types_htab
== NULL
)
4681 dwarf2_per_objfile
->signatured_types
= NULL
;
4685 dwarf2_per_objfile
->signatured_types
= types_htab
;
4687 dwarf2_per_objfile
->n_type_units
4688 = dwarf2_per_objfile
->n_allocated_type_units
4689 = htab_elements (types_htab
);
4690 dwarf2_per_objfile
->all_type_units
4691 = xmalloc (dwarf2_per_objfile
->n_type_units
4692 * sizeof (struct signatured_type
*));
4693 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4694 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4695 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4696 == dwarf2_per_objfile
->n_type_units
);
4701 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4702 If SLOT is non-NULL, it is the entry to use in the hash table.
4703 Otherwise we find one. */
4705 static struct signatured_type
*
4706 add_type_unit (ULONGEST sig
, void **slot
)
4708 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4709 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4710 struct signatured_type
*sig_type
;
4712 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4714 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4716 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4717 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4718 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4719 dwarf2_per_objfile
->all_type_units
4720 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4721 dwarf2_per_objfile
->n_allocated_type_units
4722 * sizeof (struct signatured_type
*));
4723 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4725 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4727 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4728 struct signatured_type
);
4729 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4730 sig_type
->signature
= sig
;
4731 sig_type
->per_cu
.is_debug_types
= 1;
4732 if (dwarf2_per_objfile
->using_index
)
4734 sig_type
->per_cu
.v
.quick
=
4735 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4736 struct dwarf2_per_cu_quick_data
);
4741 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4744 gdb_assert (*slot
== NULL
);
4746 /* The rest of sig_type must be filled in by the caller. */
4750 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4751 Fill in SIG_ENTRY with DWO_ENTRY. */
4754 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4755 struct signatured_type
*sig_entry
,
4756 struct dwo_unit
*dwo_entry
)
4758 /* Make sure we're not clobbering something we don't expect to. */
4759 gdb_assert (! sig_entry
->per_cu
.queued
);
4760 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4761 if (dwarf2_per_objfile
->using_index
)
4763 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4764 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4767 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4768 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4769 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4770 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4771 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4773 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4774 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4775 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4776 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4777 sig_entry
->per_cu
.objfile
= objfile
;
4778 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4779 sig_entry
->dwo_unit
= dwo_entry
;
4782 /* Subroutine of lookup_signatured_type.
4783 If we haven't read the TU yet, create the signatured_type data structure
4784 for a TU to be read in directly from a DWO file, bypassing the stub.
4785 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4786 using .gdb_index, then when reading a CU we want to stay in the DWO file
4787 containing that CU. Otherwise we could end up reading several other DWO
4788 files (due to comdat folding) to process the transitive closure of all the
4789 mentioned TUs, and that can be slow. The current DWO file will have every
4790 type signature that it needs.
4791 We only do this for .gdb_index because in the psymtab case we already have
4792 to read all the DWOs to build the type unit groups. */
4794 static struct signatured_type
*
4795 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4797 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4798 struct dwo_file
*dwo_file
;
4799 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4800 struct signatured_type find_sig_entry
, *sig_entry
;
4803 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4805 /* If TU skeletons have been removed then we may not have read in any
4807 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4809 dwarf2_per_objfile
->signatured_types
4810 = allocate_signatured_type_table (objfile
);
4813 /* We only ever need to read in one copy of a signatured type.
4814 Use the global signatured_types array to do our own comdat-folding
4815 of types. If this is the first time we're reading this TU, and
4816 the TU has an entry in .gdb_index, replace the recorded data from
4817 .gdb_index with this TU. */
4819 find_sig_entry
.signature
= sig
;
4820 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4821 &find_sig_entry
, INSERT
);
4824 /* We can get here with the TU already read, *or* in the process of being
4825 read. Don't reassign the global entry to point to this DWO if that's
4826 the case. Also note that if the TU is already being read, it may not
4827 have come from a DWO, the program may be a mix of Fission-compiled
4828 code and non-Fission-compiled code. */
4830 /* Have we already tried to read this TU?
4831 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4832 needn't exist in the global table yet). */
4833 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4836 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4837 dwo_unit of the TU itself. */
4838 dwo_file
= cu
->dwo_unit
->dwo_file
;
4840 /* Ok, this is the first time we're reading this TU. */
4841 if (dwo_file
->tus
== NULL
)
4843 find_dwo_entry
.signature
= sig
;
4844 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4845 if (dwo_entry
== NULL
)
4848 /* If the global table doesn't have an entry for this TU, add one. */
4849 if (sig_entry
== NULL
)
4850 sig_entry
= add_type_unit (sig
, slot
);
4852 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4853 sig_entry
->per_cu
.tu_read
= 1;
4857 /* Subroutine of lookup_signatured_type.
4858 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4859 then try the DWP file. If the TU stub (skeleton) has been removed then
4860 it won't be in .gdb_index. */
4862 static struct signatured_type
*
4863 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4865 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4866 struct dwp_file
*dwp_file
= get_dwp_file ();
4867 struct dwo_unit
*dwo_entry
;
4868 struct signatured_type find_sig_entry
, *sig_entry
;
4871 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4872 gdb_assert (dwp_file
!= NULL
);
4874 /* If TU skeletons have been removed then we may not have read in any
4876 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4878 dwarf2_per_objfile
->signatured_types
4879 = allocate_signatured_type_table (objfile
);
4882 find_sig_entry
.signature
= sig
;
4883 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4884 &find_sig_entry
, INSERT
);
4887 /* Have we already tried to read this TU?
4888 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4889 needn't exist in the global table yet). */
4890 if (sig_entry
!= NULL
)
4893 if (dwp_file
->tus
== NULL
)
4895 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4896 sig
, 1 /* is_debug_types */);
4897 if (dwo_entry
== NULL
)
4900 sig_entry
= add_type_unit (sig
, slot
);
4901 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4906 /* Lookup a signature based type for DW_FORM_ref_sig8.
4907 Returns NULL if signature SIG is not present in the table.
4908 It is up to the caller to complain about this. */
4910 static struct signatured_type
*
4911 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4914 && dwarf2_per_objfile
->using_index
)
4916 /* We're in a DWO/DWP file, and we're using .gdb_index.
4917 These cases require special processing. */
4918 if (get_dwp_file () == NULL
)
4919 return lookup_dwo_signatured_type (cu
, sig
);
4921 return lookup_dwp_signatured_type (cu
, sig
);
4925 struct signatured_type find_entry
, *entry
;
4927 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4929 find_entry
.signature
= sig
;
4930 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4935 /* Low level DIE reading support. */
4937 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4940 init_cu_die_reader (struct die_reader_specs
*reader
,
4941 struct dwarf2_cu
*cu
,
4942 struct dwarf2_section_info
*section
,
4943 struct dwo_file
*dwo_file
)
4945 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4946 reader
->abfd
= get_section_bfd_owner (section
);
4948 reader
->dwo_file
= dwo_file
;
4949 reader
->die_section
= section
;
4950 reader
->buffer
= section
->buffer
;
4951 reader
->buffer_end
= section
->buffer
+ section
->size
;
4952 reader
->comp_dir
= NULL
;
4955 /* Subroutine of init_cutu_and_read_dies to simplify it.
4956 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
4957 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
4960 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
4961 from it to the DIE in the DWO. If NULL we are skipping the stub.
4962 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
4963 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
4964 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
4965 STUB_COMP_DIR may be non-NULL.
4966 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
4967 are filled in with the info of the DIE from the DWO file.
4968 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
4969 provided an abbrev table to use.
4970 The result is non-zero if a valid (non-dummy) DIE was found. */
4973 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
4974 struct dwo_unit
*dwo_unit
,
4975 int abbrev_table_provided
,
4976 struct die_info
*stub_comp_unit_die
,
4977 const char *stub_comp_dir
,
4978 struct die_reader_specs
*result_reader
,
4979 const gdb_byte
**result_info_ptr
,
4980 struct die_info
**result_comp_unit_die
,
4981 int *result_has_children
)
4983 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4984 struct dwarf2_cu
*cu
= this_cu
->cu
;
4985 struct dwarf2_section_info
*section
;
4987 const gdb_byte
*begin_info_ptr
, *info_ptr
;
4988 ULONGEST signature
; /* Or dwo_id. */
4989 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4990 int i
,num_extra_attrs
;
4991 struct dwarf2_section_info
*dwo_abbrev_section
;
4992 struct attribute
*attr
;
4993 struct die_info
*comp_unit_die
;
4995 /* At most one of these may be provided. */
4996 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
4998 /* These attributes aren't processed until later:
4999 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5000 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5001 referenced later. However, these attributes are found in the stub
5002 which we won't have later. In order to not impose this complication
5003 on the rest of the code, we read them here and copy them to the
5012 if (stub_comp_unit_die
!= NULL
)
5014 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5016 if (! this_cu
->is_debug_types
)
5017 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5018 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5019 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5020 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5021 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5023 /* There should be a DW_AT_addr_base attribute here (if needed).
5024 We need the value before we can process DW_FORM_GNU_addr_index. */
5026 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5028 cu
->addr_base
= DW_UNSND (attr
);
5030 /* There should be a DW_AT_ranges_base attribute here (if needed).
5031 We need the value before we can process DW_AT_ranges. */
5032 cu
->ranges_base
= 0;
5033 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5035 cu
->ranges_base
= DW_UNSND (attr
);
5037 else if (stub_comp_dir
!= NULL
)
5039 /* Reconstruct the comp_dir attribute to simplify the code below. */
5040 comp_dir
= (struct attribute
*)
5041 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5042 comp_dir
->name
= DW_AT_comp_dir
;
5043 comp_dir
->form
= DW_FORM_string
;
5044 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5045 DW_STRING (comp_dir
) = stub_comp_dir
;
5048 /* Set up for reading the DWO CU/TU. */
5049 cu
->dwo_unit
= dwo_unit
;
5050 section
= dwo_unit
->section
;
5051 dwarf2_read_section (objfile
, section
);
5052 abfd
= get_section_bfd_owner (section
);
5053 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5054 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5055 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5057 if (this_cu
->is_debug_types
)
5059 ULONGEST header_signature
;
5060 cu_offset type_offset_in_tu
;
5061 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5063 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5067 &type_offset_in_tu
);
5068 /* This is not an assert because it can be caused by bad debug info. */
5069 if (sig_type
->signature
!= header_signature
)
5071 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5072 " TU at offset 0x%x [in module %s]"),
5073 hex_string (sig_type
->signature
),
5074 hex_string (header_signature
),
5075 dwo_unit
->offset
.sect_off
,
5076 bfd_get_filename (abfd
));
5078 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5079 /* For DWOs coming from DWP files, we don't know the CU length
5080 nor the type's offset in the TU until now. */
5081 dwo_unit
->length
= get_cu_length (&cu
->header
);
5082 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5084 /* Establish the type offset that can be used to lookup the type.
5085 For DWO files, we don't know it until now. */
5086 sig_type
->type_offset_in_section
.sect_off
=
5087 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5091 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5094 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5095 /* For DWOs coming from DWP files, we don't know the CU length
5097 dwo_unit
->length
= get_cu_length (&cu
->header
);
5100 /* Replace the CU's original abbrev table with the DWO's.
5101 Reminder: We can't read the abbrev table until we've read the header. */
5102 if (abbrev_table_provided
)
5104 /* Don't free the provided abbrev table, the caller of
5105 init_cutu_and_read_dies owns it. */
5106 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5107 /* Ensure the DWO abbrev table gets freed. */
5108 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5112 dwarf2_free_abbrev_table (cu
);
5113 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5114 /* Leave any existing abbrev table cleanup as is. */
5117 /* Read in the die, but leave space to copy over the attributes
5118 from the stub. This has the benefit of simplifying the rest of
5119 the code - all the work to maintain the illusion of a single
5120 DW_TAG_{compile,type}_unit DIE is done here. */
5121 num_extra_attrs
= ((stmt_list
!= NULL
)
5125 + (comp_dir
!= NULL
));
5126 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5127 result_has_children
, num_extra_attrs
);
5129 /* Copy over the attributes from the stub to the DIE we just read in. */
5130 comp_unit_die
= *result_comp_unit_die
;
5131 i
= comp_unit_die
->num_attrs
;
5132 if (stmt_list
!= NULL
)
5133 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5135 comp_unit_die
->attrs
[i
++] = *low_pc
;
5136 if (high_pc
!= NULL
)
5137 comp_unit_die
->attrs
[i
++] = *high_pc
;
5139 comp_unit_die
->attrs
[i
++] = *ranges
;
5140 if (comp_dir
!= NULL
)
5141 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5142 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5144 if (dwarf2_die_debug
)
5146 fprintf_unfiltered (gdb_stdlog
,
5147 "Read die from %s@0x%x of %s:\n",
5148 get_section_name (section
),
5149 (unsigned) (begin_info_ptr
- section
->buffer
),
5150 bfd_get_filename (abfd
));
5151 dump_die (comp_unit_die
, dwarf2_die_debug
);
5154 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5155 TUs by skipping the stub and going directly to the entry in the DWO file.
5156 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5157 to get it via circuitous means. Blech. */
5158 if (comp_dir
!= NULL
)
5159 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5161 /* Skip dummy compilation units. */
5162 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5163 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5166 *result_info_ptr
= info_ptr
;
5170 /* Subroutine of init_cutu_and_read_dies to simplify it.
5171 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5172 Returns NULL if the specified DWO unit cannot be found. */
5174 static struct dwo_unit
*
5175 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5176 struct die_info
*comp_unit_die
)
5178 struct dwarf2_cu
*cu
= this_cu
->cu
;
5179 struct attribute
*attr
;
5181 struct dwo_unit
*dwo_unit
;
5182 const char *comp_dir
, *dwo_name
;
5184 gdb_assert (cu
!= NULL
);
5186 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5187 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5188 gdb_assert (attr
!= NULL
);
5189 dwo_name
= DW_STRING (attr
);
5191 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5193 comp_dir
= DW_STRING (attr
);
5195 if (this_cu
->is_debug_types
)
5197 struct signatured_type
*sig_type
;
5199 /* Since this_cu is the first member of struct signatured_type,
5200 we can go from a pointer to one to a pointer to the other. */
5201 sig_type
= (struct signatured_type
*) this_cu
;
5202 signature
= sig_type
->signature
;
5203 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5207 struct attribute
*attr
;
5209 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5211 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5213 dwo_name
, objfile_name (this_cu
->objfile
));
5214 signature
= DW_UNSND (attr
);
5215 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5222 /* Subroutine of init_cutu_and_read_dies to simplify it.
5223 See it for a description of the parameters.
5224 Read a TU directly from a DWO file, bypassing the stub.
5226 Note: This function could be a little bit simpler if we shared cleanups
5227 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5228 to do, so we keep this function self-contained. Or we could move this
5229 into our caller, but it's complex enough already. */
5232 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5233 int use_existing_cu
, int keep
,
5234 die_reader_func_ftype
*die_reader_func
,
5237 struct dwarf2_cu
*cu
;
5238 struct signatured_type
*sig_type
;
5239 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5240 struct die_reader_specs reader
;
5241 const gdb_byte
*info_ptr
;
5242 struct die_info
*comp_unit_die
;
5245 /* Verify we can do the following downcast, and that we have the
5247 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5248 sig_type
= (struct signatured_type
*) this_cu
;
5249 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5251 cleanups
= make_cleanup (null_cleanup
, NULL
);
5253 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5255 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5257 /* There's no need to do the rereading_dwo_cu handling that
5258 init_cutu_and_read_dies does since we don't read the stub. */
5262 /* If !use_existing_cu, this_cu->cu must be NULL. */
5263 gdb_assert (this_cu
->cu
== NULL
);
5264 cu
= xmalloc (sizeof (*cu
));
5265 init_one_comp_unit (cu
, this_cu
);
5266 /* If an error occurs while loading, release our storage. */
5267 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5270 /* A future optimization, if needed, would be to use an existing
5271 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5272 could share abbrev tables. */
5274 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5275 0 /* abbrev_table_provided */,
5276 NULL
/* stub_comp_unit_die */,
5277 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5279 &comp_unit_die
, &has_children
) == 0)
5282 do_cleanups (cleanups
);
5286 /* All the "real" work is done here. */
5287 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5289 /* This duplicates the code in init_cutu_and_read_dies,
5290 but the alternative is making the latter more complex.
5291 This function is only for the special case of using DWO files directly:
5292 no point in overly complicating the general case just to handle this. */
5293 if (free_cu_cleanup
!= NULL
)
5297 /* We've successfully allocated this compilation unit. Let our
5298 caller clean it up when finished with it. */
5299 discard_cleanups (free_cu_cleanup
);
5301 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5302 So we have to manually free the abbrev table. */
5303 dwarf2_free_abbrev_table (cu
);
5305 /* Link this CU into read_in_chain. */
5306 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5307 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5310 do_cleanups (free_cu_cleanup
);
5313 do_cleanups (cleanups
);
5316 /* Initialize a CU (or TU) and read its DIEs.
5317 If the CU defers to a DWO file, read the DWO file as well.
5319 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5320 Otherwise the table specified in the comp unit header is read in and used.
5321 This is an optimization for when we already have the abbrev table.
5323 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5324 Otherwise, a new CU is allocated with xmalloc.
5326 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5327 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5329 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5330 linker) then DIE_READER_FUNC will not get called. */
5333 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5334 struct abbrev_table
*abbrev_table
,
5335 int use_existing_cu
, int keep
,
5336 die_reader_func_ftype
*die_reader_func
,
5339 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5340 struct dwarf2_section_info
*section
= this_cu
->section
;
5341 bfd
*abfd
= get_section_bfd_owner (section
);
5342 struct dwarf2_cu
*cu
;
5343 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5344 struct die_reader_specs reader
;
5345 struct die_info
*comp_unit_die
;
5347 struct attribute
*attr
;
5348 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5349 struct signatured_type
*sig_type
= NULL
;
5350 struct dwarf2_section_info
*abbrev_section
;
5351 /* Non-zero if CU currently points to a DWO file and we need to
5352 reread it. When this happens we need to reread the skeleton die
5353 before we can reread the DWO file (this only applies to CUs, not TUs). */
5354 int rereading_dwo_cu
= 0;
5356 if (dwarf2_die_debug
)
5357 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5358 this_cu
->is_debug_types
? "type" : "comp",
5359 this_cu
->offset
.sect_off
);
5361 if (use_existing_cu
)
5364 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5365 file (instead of going through the stub), short-circuit all of this. */
5366 if (this_cu
->reading_dwo_directly
)
5368 /* Narrow down the scope of possibilities to have to understand. */
5369 gdb_assert (this_cu
->is_debug_types
);
5370 gdb_assert (abbrev_table
== NULL
);
5371 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5372 die_reader_func
, data
);
5376 cleanups
= make_cleanup (null_cleanup
, NULL
);
5378 /* This is cheap if the section is already read in. */
5379 dwarf2_read_section (objfile
, section
);
5381 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5383 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5385 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5388 /* If this CU is from a DWO file we need to start over, we need to
5389 refetch the attributes from the skeleton CU.
5390 This could be optimized by retrieving those attributes from when we
5391 were here the first time: the previous comp_unit_die was stored in
5392 comp_unit_obstack. But there's no data yet that we need this
5394 if (cu
->dwo_unit
!= NULL
)
5395 rereading_dwo_cu
= 1;
5399 /* If !use_existing_cu, this_cu->cu must be NULL. */
5400 gdb_assert (this_cu
->cu
== NULL
);
5401 cu
= xmalloc (sizeof (*cu
));
5402 init_one_comp_unit (cu
, this_cu
);
5403 /* If an error occurs while loading, release our storage. */
5404 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5407 /* Get the header. */
5408 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5410 /* We already have the header, there's no need to read it in again. */
5411 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5415 if (this_cu
->is_debug_types
)
5418 cu_offset type_offset_in_tu
;
5420 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5421 abbrev_section
, info_ptr
,
5423 &type_offset_in_tu
);
5425 /* Since per_cu is the first member of struct signatured_type,
5426 we can go from a pointer to one to a pointer to the other. */
5427 sig_type
= (struct signatured_type
*) this_cu
;
5428 gdb_assert (sig_type
->signature
== signature
);
5429 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5430 == type_offset_in_tu
.cu_off
);
5431 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5433 /* LENGTH has not been set yet for type units if we're
5434 using .gdb_index. */
5435 this_cu
->length
= get_cu_length (&cu
->header
);
5437 /* Establish the type offset that can be used to lookup the type. */
5438 sig_type
->type_offset_in_section
.sect_off
=
5439 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5443 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5447 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5448 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5452 /* Skip dummy compilation units. */
5453 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5454 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5456 do_cleanups (cleanups
);
5460 /* If we don't have them yet, read the abbrevs for this compilation unit.
5461 And if we need to read them now, make sure they're freed when we're
5462 done. Note that it's important that if the CU had an abbrev table
5463 on entry we don't free it when we're done: Somewhere up the call stack
5464 it may be in use. */
5465 if (abbrev_table
!= NULL
)
5467 gdb_assert (cu
->abbrev_table
== NULL
);
5468 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5469 == abbrev_table
->offset
.sect_off
);
5470 cu
->abbrev_table
= abbrev_table
;
5472 else if (cu
->abbrev_table
== NULL
)
5474 dwarf2_read_abbrevs (cu
, abbrev_section
);
5475 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5477 else if (rereading_dwo_cu
)
5479 dwarf2_free_abbrev_table (cu
);
5480 dwarf2_read_abbrevs (cu
, abbrev_section
);
5483 /* Read the top level CU/TU die. */
5484 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5485 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5487 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5489 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5490 DWO CU, that this test will fail (the attribute will not be present). */
5491 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5494 struct dwo_unit
*dwo_unit
;
5495 struct die_info
*dwo_comp_unit_die
;
5499 complaint (&symfile_complaints
,
5500 _("compilation unit with DW_AT_GNU_dwo_name"
5501 " has children (offset 0x%x) [in module %s]"),
5502 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5504 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5505 if (dwo_unit
!= NULL
)
5507 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5508 abbrev_table
!= NULL
,
5509 comp_unit_die
, NULL
,
5511 &dwo_comp_unit_die
, &has_children
) == 0)
5514 do_cleanups (cleanups
);
5517 comp_unit_die
= dwo_comp_unit_die
;
5521 /* Yikes, we couldn't find the rest of the DIE, we only have
5522 the stub. A complaint has already been logged. There's
5523 not much more we can do except pass on the stub DIE to
5524 die_reader_func. We don't want to throw an error on bad
5529 /* All of the above is setup for this call. Yikes. */
5530 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5532 /* Done, clean up. */
5533 if (free_cu_cleanup
!= NULL
)
5537 /* We've successfully allocated this compilation unit. Let our
5538 caller clean it up when finished with it. */
5539 discard_cleanups (free_cu_cleanup
);
5541 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5542 So we have to manually free the abbrev table. */
5543 dwarf2_free_abbrev_table (cu
);
5545 /* Link this CU into read_in_chain. */
5546 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5547 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5550 do_cleanups (free_cu_cleanup
);
5553 do_cleanups (cleanups
);
5556 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5557 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5558 to have already done the lookup to find the DWO file).
5560 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5561 THIS_CU->is_debug_types, but nothing else.
5563 We fill in THIS_CU->length.
5565 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5566 linker) then DIE_READER_FUNC will not get called.
5568 THIS_CU->cu is always freed when done.
5569 This is done in order to not leave THIS_CU->cu in a state where we have
5570 to care whether it refers to the "main" CU or the DWO CU. */
5573 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5574 struct dwo_file
*dwo_file
,
5575 die_reader_func_ftype
*die_reader_func
,
5578 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5579 struct dwarf2_section_info
*section
= this_cu
->section
;
5580 bfd
*abfd
= get_section_bfd_owner (section
);
5581 struct dwarf2_section_info
*abbrev_section
;
5582 struct dwarf2_cu cu
;
5583 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5584 struct die_reader_specs reader
;
5585 struct cleanup
*cleanups
;
5586 struct die_info
*comp_unit_die
;
5589 if (dwarf2_die_debug
)
5590 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5591 this_cu
->is_debug_types
? "type" : "comp",
5592 this_cu
->offset
.sect_off
);
5594 gdb_assert (this_cu
->cu
== NULL
);
5596 abbrev_section
= (dwo_file
!= NULL
5597 ? &dwo_file
->sections
.abbrev
5598 : get_abbrev_section_for_cu (this_cu
));
5600 /* This is cheap if the section is already read in. */
5601 dwarf2_read_section (objfile
, section
);
5603 init_one_comp_unit (&cu
, this_cu
);
5605 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5607 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5608 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5609 abbrev_section
, info_ptr
,
5610 this_cu
->is_debug_types
);
5612 this_cu
->length
= get_cu_length (&cu
.header
);
5614 /* Skip dummy compilation units. */
5615 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5616 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5618 do_cleanups (cleanups
);
5622 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5623 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5625 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5626 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5628 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5630 do_cleanups (cleanups
);
5633 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5634 does not lookup the specified DWO file.
5635 This cannot be used to read DWO files.
5637 THIS_CU->cu is always freed when done.
5638 This is done in order to not leave THIS_CU->cu in a state where we have
5639 to care whether it refers to the "main" CU or the DWO CU.
5640 We can revisit this if the data shows there's a performance issue. */
5643 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5644 die_reader_func_ftype
*die_reader_func
,
5647 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5650 /* Type Unit Groups.
5652 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5653 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5654 so that all types coming from the same compilation (.o file) are grouped
5655 together. A future step could be to put the types in the same symtab as
5656 the CU the types ultimately came from. */
5659 hash_type_unit_group (const void *item
)
5661 const struct type_unit_group
*tu_group
= item
;
5663 return hash_stmt_list_entry (&tu_group
->hash
);
5667 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5669 const struct type_unit_group
*lhs
= item_lhs
;
5670 const struct type_unit_group
*rhs
= item_rhs
;
5672 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5675 /* Allocate a hash table for type unit groups. */
5678 allocate_type_unit_groups_table (void)
5680 return htab_create_alloc_ex (3,
5681 hash_type_unit_group
,
5684 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5685 hashtab_obstack_allocate
,
5686 dummy_obstack_deallocate
);
5689 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5690 partial symtabs. We combine several TUs per psymtab to not let the size
5691 of any one psymtab grow too big. */
5692 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5693 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5695 /* Helper routine for get_type_unit_group.
5696 Create the type_unit_group object used to hold one or more TUs. */
5698 static struct type_unit_group
*
5699 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5701 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5702 struct dwarf2_per_cu_data
*per_cu
;
5703 struct type_unit_group
*tu_group
;
5705 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5706 struct type_unit_group
);
5707 per_cu
= &tu_group
->per_cu
;
5708 per_cu
->objfile
= objfile
;
5710 if (dwarf2_per_objfile
->using_index
)
5712 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5713 struct dwarf2_per_cu_quick_data
);
5717 unsigned int line_offset
= line_offset_struct
.sect_off
;
5718 struct partial_symtab
*pst
;
5721 /* Give the symtab a useful name for debug purposes. */
5722 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5723 name
= xstrprintf ("<type_units_%d>",
5724 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5726 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5728 pst
= create_partial_symtab (per_cu
, name
);
5734 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5735 tu_group
->hash
.line_offset
= line_offset_struct
;
5740 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5741 STMT_LIST is a DW_AT_stmt_list attribute. */
5743 static struct type_unit_group
*
5744 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5746 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5747 struct type_unit_group
*tu_group
;
5749 unsigned int line_offset
;
5750 struct type_unit_group type_unit_group_for_lookup
;
5752 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5754 dwarf2_per_objfile
->type_unit_groups
=
5755 allocate_type_unit_groups_table ();
5758 /* Do we need to create a new group, or can we use an existing one? */
5762 line_offset
= DW_UNSND (stmt_list
);
5763 ++tu_stats
->nr_symtab_sharers
;
5767 /* Ugh, no stmt_list. Rare, but we have to handle it.
5768 We can do various things here like create one group per TU or
5769 spread them over multiple groups to split up the expansion work.
5770 To avoid worst case scenarios (too many groups or too large groups)
5771 we, umm, group them in bunches. */
5772 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5773 | (tu_stats
->nr_stmt_less_type_units
5774 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5775 ++tu_stats
->nr_stmt_less_type_units
;
5778 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5779 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5780 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5781 &type_unit_group_for_lookup
, INSERT
);
5785 gdb_assert (tu_group
!= NULL
);
5789 sect_offset line_offset_struct
;
5791 line_offset_struct
.sect_off
= line_offset
;
5792 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5794 ++tu_stats
->nr_symtabs
;
5800 /* Partial symbol tables. */
5802 /* Create a psymtab named NAME and assign it to PER_CU.
5804 The caller must fill in the following details:
5805 dirname, textlow, texthigh. */
5807 static struct partial_symtab
*
5808 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5810 struct objfile
*objfile
= per_cu
->objfile
;
5811 struct partial_symtab
*pst
;
5813 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5815 objfile
->global_psymbols
.next
,
5816 objfile
->static_psymbols
.next
);
5818 pst
->psymtabs_addrmap_supported
= 1;
5820 /* This is the glue that links PST into GDB's symbol API. */
5821 pst
->read_symtab_private
= per_cu
;
5822 pst
->read_symtab
= dwarf2_read_symtab
;
5823 per_cu
->v
.psymtab
= pst
;
5828 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5831 struct process_psymtab_comp_unit_data
5833 /* True if we are reading a DW_TAG_partial_unit. */
5835 int want_partial_unit
;
5837 /* The "pretend" language that is used if the CU doesn't declare a
5840 enum language pretend_language
;
5843 /* die_reader_func for process_psymtab_comp_unit. */
5846 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5847 const gdb_byte
*info_ptr
,
5848 struct die_info
*comp_unit_die
,
5852 struct dwarf2_cu
*cu
= reader
->cu
;
5853 struct objfile
*objfile
= cu
->objfile
;
5854 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5855 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5856 struct attribute
*attr
;
5858 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5859 struct partial_symtab
*pst
;
5861 const char *filename
;
5862 struct process_psymtab_comp_unit_data
*info
= data
;
5864 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5867 gdb_assert (! per_cu
->is_debug_types
);
5869 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5871 cu
->list_in_scope
= &file_symbols
;
5873 /* Allocate a new partial symbol table structure. */
5874 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5875 if (attr
== NULL
|| !DW_STRING (attr
))
5878 filename
= DW_STRING (attr
);
5880 pst
= create_partial_symtab (per_cu
, filename
);
5882 /* This must be done before calling dwarf2_build_include_psymtabs. */
5883 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5885 pst
->dirname
= DW_STRING (attr
);
5887 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5889 dwarf2_find_base_address (comp_unit_die
, cu
);
5891 /* Possibly set the default values of LOWPC and HIGHPC from
5893 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5894 &best_highpc
, cu
, pst
);
5895 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5896 /* Store the contiguous range if it is not empty; it can be empty for
5897 CUs with no code. */
5898 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5899 gdbarch_adjust_dwarf2_addr (gdbarch
,
5900 best_lowpc
+ baseaddr
),
5901 gdbarch_adjust_dwarf2_addr (gdbarch
,
5902 best_highpc
+ baseaddr
) - 1,
5905 /* Check if comp unit has_children.
5906 If so, read the rest of the partial symbols from this comp unit.
5907 If not, there's no more debug_info for this comp unit. */
5910 struct partial_die_info
*first_die
;
5911 CORE_ADDR lowpc
, highpc
;
5913 lowpc
= ((CORE_ADDR
) -1);
5914 highpc
= ((CORE_ADDR
) 0);
5916 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5918 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5921 /* If we didn't find a lowpc, set it to highpc to avoid
5922 complaints from `maint check'. */
5923 if (lowpc
== ((CORE_ADDR
) -1))
5926 /* If the compilation unit didn't have an explicit address range,
5927 then use the information extracted from its child dies. */
5931 best_highpc
= highpc
;
5934 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
5935 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
5937 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5938 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5939 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5940 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5941 sort_pst_symbols (objfile
, pst
);
5943 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
5946 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5947 struct dwarf2_per_cu_data
*iter
;
5949 /* Fill in 'dependencies' here; we fill in 'users' in a
5951 pst
->number_of_dependencies
= len
;
5952 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5953 len
* sizeof (struct symtab
*));
5955 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
5958 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5960 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5963 /* Get the list of files included in the current compilation unit,
5964 and build a psymtab for each of them. */
5965 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
5967 if (dwarf2_read_debug
)
5969 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5971 fprintf_unfiltered (gdb_stdlog
,
5972 "Psymtab for %s unit @0x%x: %s - %s"
5973 ", %d global, %d static syms\n",
5974 per_cu
->is_debug_types
? "type" : "comp",
5975 per_cu
->offset
.sect_off
,
5976 paddress (gdbarch
, pst
->textlow
),
5977 paddress (gdbarch
, pst
->texthigh
),
5978 pst
->n_global_syms
, pst
->n_static_syms
);
5982 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5983 Process compilation unit THIS_CU for a psymtab. */
5986 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5987 int want_partial_unit
,
5988 enum language pretend_language
)
5990 struct process_psymtab_comp_unit_data info
;
5992 /* If this compilation unit was already read in, free the
5993 cached copy in order to read it in again. This is
5994 necessary because we skipped some symbols when we first
5995 read in the compilation unit (see load_partial_dies).
5996 This problem could be avoided, but the benefit is unclear. */
5997 if (this_cu
->cu
!= NULL
)
5998 free_one_cached_comp_unit (this_cu
);
6000 gdb_assert (! this_cu
->is_debug_types
);
6001 info
.want_partial_unit
= want_partial_unit
;
6002 info
.pretend_language
= pretend_language
;
6003 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6004 process_psymtab_comp_unit_reader
,
6007 /* Age out any secondary CUs. */
6008 age_cached_comp_units ();
6011 /* Reader function for build_type_psymtabs. */
6014 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6015 const gdb_byte
*info_ptr
,
6016 struct die_info
*type_unit_die
,
6020 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6021 struct dwarf2_cu
*cu
= reader
->cu
;
6022 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6023 struct signatured_type
*sig_type
;
6024 struct type_unit_group
*tu_group
;
6025 struct attribute
*attr
;
6026 struct partial_die_info
*first_die
;
6027 CORE_ADDR lowpc
, highpc
;
6028 struct partial_symtab
*pst
;
6030 gdb_assert (data
== NULL
);
6031 gdb_assert (per_cu
->is_debug_types
);
6032 sig_type
= (struct signatured_type
*) per_cu
;
6037 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6038 tu_group
= get_type_unit_group (cu
, attr
);
6040 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6042 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6043 cu
->list_in_scope
= &file_symbols
;
6044 pst
= create_partial_symtab (per_cu
, "");
6047 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6049 lowpc
= (CORE_ADDR
) -1;
6050 highpc
= (CORE_ADDR
) 0;
6051 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6053 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6054 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6055 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6056 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6057 sort_pst_symbols (objfile
, pst
);
6060 /* Struct used to sort TUs by their abbreviation table offset. */
6062 struct tu_abbrev_offset
6064 struct signatured_type
*sig_type
;
6065 sect_offset abbrev_offset
;
6068 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6071 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6073 const struct tu_abbrev_offset
* const *a
= ap
;
6074 const struct tu_abbrev_offset
* const *b
= bp
;
6075 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6076 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6078 return (aoff
> boff
) - (aoff
< boff
);
6081 /* Efficiently read all the type units.
6082 This does the bulk of the work for build_type_psymtabs.
6084 The efficiency is because we sort TUs by the abbrev table they use and
6085 only read each abbrev table once. In one program there are 200K TUs
6086 sharing 8K abbrev tables.
6088 The main purpose of this function is to support building the
6089 dwarf2_per_objfile->type_unit_groups table.
6090 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6091 can collapse the search space by grouping them by stmt_list.
6092 The savings can be significant, in the same program from above the 200K TUs
6093 share 8K stmt_list tables.
6095 FUNC is expected to call get_type_unit_group, which will create the
6096 struct type_unit_group if necessary and add it to
6097 dwarf2_per_objfile->type_unit_groups. */
6100 build_type_psymtabs_1 (void)
6102 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6103 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6104 struct cleanup
*cleanups
;
6105 struct abbrev_table
*abbrev_table
;
6106 sect_offset abbrev_offset
;
6107 struct tu_abbrev_offset
*sorted_by_abbrev
;
6108 struct type_unit_group
**iter
;
6111 /* It's up to the caller to not call us multiple times. */
6112 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6114 if (dwarf2_per_objfile
->n_type_units
== 0)
6117 /* TUs typically share abbrev tables, and there can be way more TUs than
6118 abbrev tables. Sort by abbrev table to reduce the number of times we
6119 read each abbrev table in.
6120 Alternatives are to punt or to maintain a cache of abbrev tables.
6121 This is simpler and efficient enough for now.
6123 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6124 symtab to use). Typically TUs with the same abbrev offset have the same
6125 stmt_list value too so in practice this should work well.
6127 The basic algorithm here is:
6129 sort TUs by abbrev table
6130 for each TU with same abbrev table:
6131 read abbrev table if first user
6132 read TU top level DIE
6133 [IWBN if DWO skeletons had DW_AT_stmt_list]
6136 if (dwarf2_read_debug
)
6137 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6139 /* Sort in a separate table to maintain the order of all_type_units
6140 for .gdb_index: TU indices directly index all_type_units. */
6141 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6142 dwarf2_per_objfile
->n_type_units
);
6143 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6145 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6147 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6148 sorted_by_abbrev
[i
].abbrev_offset
=
6149 read_abbrev_offset (sig_type
->per_cu
.section
,
6150 sig_type
->per_cu
.offset
);
6152 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6153 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6154 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6156 abbrev_offset
.sect_off
= ~(unsigned) 0;
6157 abbrev_table
= NULL
;
6158 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6160 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6162 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6164 /* Switch to the next abbrev table if necessary. */
6165 if (abbrev_table
== NULL
6166 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6168 if (abbrev_table
!= NULL
)
6170 abbrev_table_free (abbrev_table
);
6171 /* Reset to NULL in case abbrev_table_read_table throws
6172 an error: abbrev_table_free_cleanup will get called. */
6173 abbrev_table
= NULL
;
6175 abbrev_offset
= tu
->abbrev_offset
;
6177 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6179 ++tu_stats
->nr_uniq_abbrev_tables
;
6182 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6183 build_type_psymtabs_reader
, NULL
);
6186 do_cleanups (cleanups
);
6189 /* Print collected type unit statistics. */
6192 print_tu_stats (void)
6194 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6196 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6197 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6198 dwarf2_per_objfile
->n_type_units
);
6199 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6200 tu_stats
->nr_uniq_abbrev_tables
);
6201 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6202 tu_stats
->nr_symtabs
);
6203 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6204 tu_stats
->nr_symtab_sharers
);
6205 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6206 tu_stats
->nr_stmt_less_type_units
);
6207 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6208 tu_stats
->nr_all_type_units_reallocs
);
6211 /* Traversal function for build_type_psymtabs. */
6214 build_type_psymtab_dependencies (void **slot
, void *info
)
6216 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6217 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6218 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6219 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6220 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6221 struct signatured_type
*iter
;
6224 gdb_assert (len
> 0);
6225 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6227 pst
->number_of_dependencies
= len
;
6228 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6229 len
* sizeof (struct psymtab
*));
6231 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6234 gdb_assert (iter
->per_cu
.is_debug_types
);
6235 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6236 iter
->type_unit_group
= tu_group
;
6239 VEC_free (sig_type_ptr
, tu_group
->tus
);
6244 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6245 Build partial symbol tables for the .debug_types comp-units. */
6248 build_type_psymtabs (struct objfile
*objfile
)
6250 if (! create_all_type_units (objfile
))
6253 build_type_psymtabs_1 ();
6256 /* Traversal function for process_skeletonless_type_unit.
6257 Read a TU in a DWO file and build partial symbols for it. */
6260 process_skeletonless_type_unit (void **slot
, void *info
)
6262 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6263 struct objfile
*objfile
= info
;
6264 struct signatured_type find_entry
, *entry
;
6266 /* If this TU doesn't exist in the global table, add it and read it in. */
6268 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6270 dwarf2_per_objfile
->signatured_types
6271 = allocate_signatured_type_table (objfile
);
6274 find_entry
.signature
= dwo_unit
->signature
;
6275 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6277 /* If we've already seen this type there's nothing to do. What's happening
6278 is we're doing our own version of comdat-folding here. */
6282 /* This does the job that create_all_type_units would have done for
6284 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6285 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6288 /* This does the job that build_type_psymtabs_1 would have done. */
6289 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6290 build_type_psymtabs_reader
, NULL
);
6295 /* Traversal function for process_skeletonless_type_units. */
6298 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6300 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6302 if (dwo_file
->tus
!= NULL
)
6304 htab_traverse_noresize (dwo_file
->tus
,
6305 process_skeletonless_type_unit
, info
);
6311 /* Scan all TUs of DWO files, verifying we've processed them.
6312 This is needed in case a TU was emitted without its skeleton.
6313 Note: This can't be done until we know what all the DWO files are. */
6316 process_skeletonless_type_units (struct objfile
*objfile
)
6318 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6319 if (get_dwp_file () == NULL
6320 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6322 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6323 process_dwo_file_for_skeletonless_type_units
,
6328 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6331 psymtabs_addrmap_cleanup (void *o
)
6333 struct objfile
*objfile
= o
;
6335 objfile
->psymtabs_addrmap
= NULL
;
6338 /* Compute the 'user' field for each psymtab in OBJFILE. */
6341 set_partial_user (struct objfile
*objfile
)
6345 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6347 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6348 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6354 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6356 /* Set the 'user' field only if it is not already set. */
6357 if (pst
->dependencies
[j
]->user
== NULL
)
6358 pst
->dependencies
[j
]->user
= pst
;
6363 /* Build the partial symbol table by doing a quick pass through the
6364 .debug_info and .debug_abbrev sections. */
6367 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6369 struct cleanup
*back_to
, *addrmap_cleanup
;
6370 struct obstack temp_obstack
;
6373 if (dwarf2_read_debug
)
6375 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6376 objfile_name (objfile
));
6379 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6381 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6383 /* Any cached compilation units will be linked by the per-objfile
6384 read_in_chain. Make sure to free them when we're done. */
6385 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6387 build_type_psymtabs (objfile
);
6389 create_all_comp_units (objfile
);
6391 /* Create a temporary address map on a temporary obstack. We later
6392 copy this to the final obstack. */
6393 obstack_init (&temp_obstack
);
6394 make_cleanup_obstack_free (&temp_obstack
);
6395 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6396 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6398 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6400 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6402 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6405 /* This has to wait until we read the CUs, we need the list of DWOs. */
6406 process_skeletonless_type_units (objfile
);
6408 /* Now that all TUs have been processed we can fill in the dependencies. */
6409 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6411 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6412 build_type_psymtab_dependencies
, NULL
);
6415 if (dwarf2_read_debug
)
6418 set_partial_user (objfile
);
6420 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6421 &objfile
->objfile_obstack
);
6422 discard_cleanups (addrmap_cleanup
);
6424 do_cleanups (back_to
);
6426 if (dwarf2_read_debug
)
6427 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6428 objfile_name (objfile
));
6431 /* die_reader_func for load_partial_comp_unit. */
6434 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6435 const gdb_byte
*info_ptr
,
6436 struct die_info
*comp_unit_die
,
6440 struct dwarf2_cu
*cu
= reader
->cu
;
6442 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6444 /* Check if comp unit has_children.
6445 If so, read the rest of the partial symbols from this comp unit.
6446 If not, there's no more debug_info for this comp unit. */
6448 load_partial_dies (reader
, info_ptr
, 0);
6451 /* Load the partial DIEs for a secondary CU into memory.
6452 This is also used when rereading a primary CU with load_all_dies. */
6455 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6457 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6458 load_partial_comp_unit_reader
, NULL
);
6462 read_comp_units_from_section (struct objfile
*objfile
,
6463 struct dwarf2_section_info
*section
,
6464 unsigned int is_dwz
,
6467 struct dwarf2_per_cu_data
***all_comp_units
)
6469 const gdb_byte
*info_ptr
;
6470 bfd
*abfd
= get_section_bfd_owner (section
);
6472 if (dwarf2_read_debug
)
6473 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6474 get_section_name (section
),
6475 get_section_file_name (section
));
6477 dwarf2_read_section (objfile
, section
);
6479 info_ptr
= section
->buffer
;
6481 while (info_ptr
< section
->buffer
+ section
->size
)
6483 unsigned int length
, initial_length_size
;
6484 struct dwarf2_per_cu_data
*this_cu
;
6487 offset
.sect_off
= info_ptr
- section
->buffer
;
6489 /* Read just enough information to find out where the next
6490 compilation unit is. */
6491 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6493 /* Save the compilation unit for later lookup. */
6494 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6495 sizeof (struct dwarf2_per_cu_data
));
6496 memset (this_cu
, 0, sizeof (*this_cu
));
6497 this_cu
->offset
= offset
;
6498 this_cu
->length
= length
+ initial_length_size
;
6499 this_cu
->is_dwz
= is_dwz
;
6500 this_cu
->objfile
= objfile
;
6501 this_cu
->section
= section
;
6503 if (*n_comp_units
== *n_allocated
)
6506 *all_comp_units
= xrealloc (*all_comp_units
,
6508 * sizeof (struct dwarf2_per_cu_data
*));
6510 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6513 info_ptr
= info_ptr
+ this_cu
->length
;
6517 /* Create a list of all compilation units in OBJFILE.
6518 This is only done for -readnow and building partial symtabs. */
6521 create_all_comp_units (struct objfile
*objfile
)
6525 struct dwarf2_per_cu_data
**all_comp_units
;
6526 struct dwz_file
*dwz
;
6530 all_comp_units
= xmalloc (n_allocated
6531 * sizeof (struct dwarf2_per_cu_data
*));
6533 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6534 &n_allocated
, &n_comp_units
, &all_comp_units
);
6536 dwz
= dwarf2_get_dwz_file ();
6538 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6539 &n_allocated
, &n_comp_units
,
6542 dwarf2_per_objfile
->all_comp_units
6543 = obstack_alloc (&objfile
->objfile_obstack
,
6544 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6545 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6546 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6547 xfree (all_comp_units
);
6548 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6551 /* Process all loaded DIEs for compilation unit CU, starting at
6552 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6553 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6554 DW_AT_ranges). See the comments of add_partial_subprogram on how
6555 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6558 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6559 CORE_ADDR
*highpc
, int set_addrmap
,
6560 struct dwarf2_cu
*cu
)
6562 struct partial_die_info
*pdi
;
6564 /* Now, march along the PDI's, descending into ones which have
6565 interesting children but skipping the children of the other ones,
6566 until we reach the end of the compilation unit. */
6572 fixup_partial_die (pdi
, cu
);
6574 /* Anonymous namespaces or modules have no name but have interesting
6575 children, so we need to look at them. Ditto for anonymous
6578 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6579 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6580 || pdi
->tag
== DW_TAG_imported_unit
)
6584 case DW_TAG_subprogram
:
6585 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6587 case DW_TAG_constant
:
6588 case DW_TAG_variable
:
6589 case DW_TAG_typedef
:
6590 case DW_TAG_union_type
:
6591 if (!pdi
->is_declaration
)
6593 add_partial_symbol (pdi
, cu
);
6596 case DW_TAG_class_type
:
6597 case DW_TAG_interface_type
:
6598 case DW_TAG_structure_type
:
6599 if (!pdi
->is_declaration
)
6601 add_partial_symbol (pdi
, cu
);
6604 case DW_TAG_enumeration_type
:
6605 if (!pdi
->is_declaration
)
6606 add_partial_enumeration (pdi
, cu
);
6608 case DW_TAG_base_type
:
6609 case DW_TAG_subrange_type
:
6610 /* File scope base type definitions are added to the partial
6612 add_partial_symbol (pdi
, cu
);
6614 case DW_TAG_namespace
:
6615 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6618 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6620 case DW_TAG_imported_unit
:
6622 struct dwarf2_per_cu_data
*per_cu
;
6624 /* For now we don't handle imported units in type units. */
6625 if (cu
->per_cu
->is_debug_types
)
6627 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6628 " supported in type units [in module %s]"),
6629 objfile_name (cu
->objfile
));
6632 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6636 /* Go read the partial unit, if needed. */
6637 if (per_cu
->v
.psymtab
== NULL
)
6638 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6640 VEC_safe_push (dwarf2_per_cu_ptr
,
6641 cu
->per_cu
->imported_symtabs
, per_cu
);
6644 case DW_TAG_imported_declaration
:
6645 add_partial_symbol (pdi
, cu
);
6652 /* If the die has a sibling, skip to the sibling. */
6654 pdi
= pdi
->die_sibling
;
6658 /* Functions used to compute the fully scoped name of a partial DIE.
6660 Normally, this is simple. For C++, the parent DIE's fully scoped
6661 name is concatenated with "::" and the partial DIE's name. For
6662 Java, the same thing occurs except that "." is used instead of "::".
6663 Enumerators are an exception; they use the scope of their parent
6664 enumeration type, i.e. the name of the enumeration type is not
6665 prepended to the enumerator.
6667 There are two complexities. One is DW_AT_specification; in this
6668 case "parent" means the parent of the target of the specification,
6669 instead of the direct parent of the DIE. The other is compilers
6670 which do not emit DW_TAG_namespace; in this case we try to guess
6671 the fully qualified name of structure types from their members'
6672 linkage names. This must be done using the DIE's children rather
6673 than the children of any DW_AT_specification target. We only need
6674 to do this for structures at the top level, i.e. if the target of
6675 any DW_AT_specification (if any; otherwise the DIE itself) does not
6678 /* Compute the scope prefix associated with PDI's parent, in
6679 compilation unit CU. The result will be allocated on CU's
6680 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6681 field. NULL is returned if no prefix is necessary. */
6683 partial_die_parent_scope (struct partial_die_info
*pdi
,
6684 struct dwarf2_cu
*cu
)
6686 const char *grandparent_scope
;
6687 struct partial_die_info
*parent
, *real_pdi
;
6689 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6690 then this means the parent of the specification DIE. */
6693 while (real_pdi
->has_specification
)
6694 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6695 real_pdi
->spec_is_dwz
, cu
);
6697 parent
= real_pdi
->die_parent
;
6701 if (parent
->scope_set
)
6702 return parent
->scope
;
6704 fixup_partial_die (parent
, cu
);
6706 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6708 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6709 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6710 Work around this problem here. */
6711 if (cu
->language
== language_cplus
6712 && parent
->tag
== DW_TAG_namespace
6713 && strcmp (parent
->name
, "::") == 0
6714 && grandparent_scope
== NULL
)
6716 parent
->scope
= NULL
;
6717 parent
->scope_set
= 1;
6721 if (pdi
->tag
== DW_TAG_enumerator
)
6722 /* Enumerators should not get the name of the enumeration as a prefix. */
6723 parent
->scope
= grandparent_scope
;
6724 else if (parent
->tag
== DW_TAG_namespace
6725 || parent
->tag
== DW_TAG_module
6726 || parent
->tag
== DW_TAG_structure_type
6727 || parent
->tag
== DW_TAG_class_type
6728 || parent
->tag
== DW_TAG_interface_type
6729 || parent
->tag
== DW_TAG_union_type
6730 || parent
->tag
== DW_TAG_enumeration_type
)
6732 if (grandparent_scope
== NULL
)
6733 parent
->scope
= parent
->name
;
6735 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6737 parent
->name
, 0, cu
);
6741 /* FIXME drow/2004-04-01: What should we be doing with
6742 function-local names? For partial symbols, we should probably be
6744 complaint (&symfile_complaints
,
6745 _("unhandled containing DIE tag %d for DIE at %d"),
6746 parent
->tag
, pdi
->offset
.sect_off
);
6747 parent
->scope
= grandparent_scope
;
6750 parent
->scope_set
= 1;
6751 return parent
->scope
;
6754 /* Return the fully scoped name associated with PDI, from compilation unit
6755 CU. The result will be allocated with malloc. */
6758 partial_die_full_name (struct partial_die_info
*pdi
,
6759 struct dwarf2_cu
*cu
)
6761 const char *parent_scope
;
6763 /* If this is a template instantiation, we can not work out the
6764 template arguments from partial DIEs. So, unfortunately, we have
6765 to go through the full DIEs. At least any work we do building
6766 types here will be reused if full symbols are loaded later. */
6767 if (pdi
->has_template_arguments
)
6769 fixup_partial_die (pdi
, cu
);
6771 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6773 struct die_info
*die
;
6774 struct attribute attr
;
6775 struct dwarf2_cu
*ref_cu
= cu
;
6777 /* DW_FORM_ref_addr is using section offset. */
6779 attr
.form
= DW_FORM_ref_addr
;
6780 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6781 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6783 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6787 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6788 if (parent_scope
== NULL
)
6791 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6795 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6797 struct objfile
*objfile
= cu
->objfile
;
6798 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6800 const char *actual_name
= NULL
;
6802 char *built_actual_name
;
6804 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6806 built_actual_name
= partial_die_full_name (pdi
, cu
);
6807 if (built_actual_name
!= NULL
)
6808 actual_name
= built_actual_name
;
6810 if (actual_name
== NULL
)
6811 actual_name
= pdi
->name
;
6815 case DW_TAG_subprogram
:
6816 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6817 if (pdi
->is_external
|| cu
->language
== language_ada
)
6819 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6820 of the global scope. But in Ada, we want to be able to access
6821 nested procedures globally. So all Ada subprograms are stored
6822 in the global scope. */
6823 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6825 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6826 built_actual_name
!= NULL
,
6827 VAR_DOMAIN
, LOC_BLOCK
,
6828 &objfile
->global_psymbols
,
6829 0, addr
, cu
->language
, objfile
);
6833 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6835 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6836 built_actual_name
!= NULL
,
6837 VAR_DOMAIN
, LOC_BLOCK
,
6838 &objfile
->static_psymbols
,
6839 0, addr
, cu
->language
, objfile
);
6842 case DW_TAG_constant
:
6844 struct psymbol_allocation_list
*list
;
6846 if (pdi
->is_external
)
6847 list
= &objfile
->global_psymbols
;
6849 list
= &objfile
->static_psymbols
;
6850 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6851 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6852 list
, 0, 0, cu
->language
, objfile
);
6855 case DW_TAG_variable
:
6857 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6861 && !dwarf2_per_objfile
->has_section_at_zero
)
6863 /* A global or static variable may also have been stripped
6864 out by the linker if unused, in which case its address
6865 will be nullified; do not add such variables into partial
6866 symbol table then. */
6868 else if (pdi
->is_external
)
6871 Don't enter into the minimal symbol tables as there is
6872 a minimal symbol table entry from the ELF symbols already.
6873 Enter into partial symbol table if it has a location
6874 descriptor or a type.
6875 If the location descriptor is missing, new_symbol will create
6876 a LOC_UNRESOLVED symbol, the address of the variable will then
6877 be determined from the minimal symbol table whenever the variable
6879 The address for the partial symbol table entry is not
6880 used by GDB, but it comes in handy for debugging partial symbol
6883 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6884 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6885 built_actual_name
!= NULL
,
6886 VAR_DOMAIN
, LOC_STATIC
,
6887 &objfile
->global_psymbols
,
6889 cu
->language
, objfile
);
6893 /* Static Variable. Skip symbols without location descriptors. */
6894 if (pdi
->d
.locdesc
== NULL
)
6896 xfree (built_actual_name
);
6899 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6900 mst_file_data, objfile); */
6901 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6902 built_actual_name
!= NULL
,
6903 VAR_DOMAIN
, LOC_STATIC
,
6904 &objfile
->static_psymbols
,
6906 cu
->language
, objfile
);
6909 case DW_TAG_typedef
:
6910 case DW_TAG_base_type
:
6911 case DW_TAG_subrange_type
:
6912 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6913 built_actual_name
!= NULL
,
6914 VAR_DOMAIN
, LOC_TYPEDEF
,
6915 &objfile
->static_psymbols
,
6916 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6918 case DW_TAG_imported_declaration
:
6919 case DW_TAG_namespace
:
6920 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6921 built_actual_name
!= NULL
,
6922 VAR_DOMAIN
, LOC_TYPEDEF
,
6923 &objfile
->global_psymbols
,
6924 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6927 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6928 built_actual_name
!= NULL
,
6929 MODULE_DOMAIN
, LOC_TYPEDEF
,
6930 &objfile
->global_psymbols
,
6931 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6933 case DW_TAG_class_type
:
6934 case DW_TAG_interface_type
:
6935 case DW_TAG_structure_type
:
6936 case DW_TAG_union_type
:
6937 case DW_TAG_enumeration_type
:
6938 /* Skip external references. The DWARF standard says in the section
6939 about "Structure, Union, and Class Type Entries": "An incomplete
6940 structure, union or class type is represented by a structure,
6941 union or class entry that does not have a byte size attribute
6942 and that has a DW_AT_declaration attribute." */
6943 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6945 xfree (built_actual_name
);
6949 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6950 static vs. global. */
6951 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6952 built_actual_name
!= NULL
,
6953 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6954 (cu
->language
== language_cplus
6955 || cu
->language
== language_java
)
6956 ? &objfile
->global_psymbols
6957 : &objfile
->static_psymbols
,
6958 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6961 case DW_TAG_enumerator
:
6962 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6963 built_actual_name
!= NULL
,
6964 VAR_DOMAIN
, LOC_CONST
,
6965 (cu
->language
== language_cplus
6966 || cu
->language
== language_java
)
6967 ? &objfile
->global_psymbols
6968 : &objfile
->static_psymbols
,
6969 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6975 xfree (built_actual_name
);
6978 /* Read a partial die corresponding to a namespace; also, add a symbol
6979 corresponding to that namespace to the symbol table. NAMESPACE is
6980 the name of the enclosing namespace. */
6983 add_partial_namespace (struct partial_die_info
*pdi
,
6984 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6985 int set_addrmap
, struct dwarf2_cu
*cu
)
6987 /* Add a symbol for the namespace. */
6989 add_partial_symbol (pdi
, cu
);
6991 /* Now scan partial symbols in that namespace. */
6993 if (pdi
->has_children
)
6994 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
6997 /* Read a partial die corresponding to a Fortran module. */
7000 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7001 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7003 /* Add a symbol for the namespace. */
7005 add_partial_symbol (pdi
, cu
);
7007 /* Now scan partial symbols in that module. */
7009 if (pdi
->has_children
)
7010 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7013 /* Read a partial die corresponding to a subprogram and create a partial
7014 symbol for that subprogram. When the CU language allows it, this
7015 routine also defines a partial symbol for each nested subprogram
7016 that this subprogram contains. If SET_ADDRMAP is true, record the
7017 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7018 and highest PC values found in PDI.
7020 PDI may also be a lexical block, in which case we simply search
7021 recursively for subprograms defined inside that lexical block.
7022 Again, this is only performed when the CU language allows this
7023 type of definitions. */
7026 add_partial_subprogram (struct partial_die_info
*pdi
,
7027 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7028 int set_addrmap
, struct dwarf2_cu
*cu
)
7030 if (pdi
->tag
== DW_TAG_subprogram
)
7032 if (pdi
->has_pc_info
)
7034 if (pdi
->lowpc
< *lowpc
)
7035 *lowpc
= pdi
->lowpc
;
7036 if (pdi
->highpc
> *highpc
)
7037 *highpc
= pdi
->highpc
;
7040 struct objfile
*objfile
= cu
->objfile
;
7041 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7046 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7047 SECT_OFF_TEXT (objfile
));
7048 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7049 pdi
->lowpc
+ baseaddr
);
7050 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7051 pdi
->highpc
+ baseaddr
);
7052 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7053 cu
->per_cu
->v
.psymtab
);
7057 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7059 if (!pdi
->is_declaration
)
7060 /* Ignore subprogram DIEs that do not have a name, they are
7061 illegal. Do not emit a complaint at this point, we will
7062 do so when we convert this psymtab into a symtab. */
7064 add_partial_symbol (pdi
, cu
);
7068 if (! pdi
->has_children
)
7071 if (cu
->language
== language_ada
)
7073 pdi
= pdi
->die_child
;
7076 fixup_partial_die (pdi
, cu
);
7077 if (pdi
->tag
== DW_TAG_subprogram
7078 || pdi
->tag
== DW_TAG_lexical_block
)
7079 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7080 pdi
= pdi
->die_sibling
;
7085 /* Read a partial die corresponding to an enumeration type. */
7088 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7089 struct dwarf2_cu
*cu
)
7091 struct partial_die_info
*pdi
;
7093 if (enum_pdi
->name
!= NULL
)
7094 add_partial_symbol (enum_pdi
, cu
);
7096 pdi
= enum_pdi
->die_child
;
7099 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7100 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7102 add_partial_symbol (pdi
, cu
);
7103 pdi
= pdi
->die_sibling
;
7107 /* Return the initial uleb128 in the die at INFO_PTR. */
7110 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7112 unsigned int bytes_read
;
7114 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7117 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7118 Return the corresponding abbrev, or NULL if the number is zero (indicating
7119 an empty DIE). In either case *BYTES_READ will be set to the length of
7120 the initial number. */
7122 static struct abbrev_info
*
7123 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7124 struct dwarf2_cu
*cu
)
7126 bfd
*abfd
= cu
->objfile
->obfd
;
7127 unsigned int abbrev_number
;
7128 struct abbrev_info
*abbrev
;
7130 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7132 if (abbrev_number
== 0)
7135 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7138 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7139 " at offset 0x%x [in module %s]"),
7140 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7141 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7147 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7148 Returns a pointer to the end of a series of DIEs, terminated by an empty
7149 DIE. Any children of the skipped DIEs will also be skipped. */
7151 static const gdb_byte
*
7152 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7154 struct dwarf2_cu
*cu
= reader
->cu
;
7155 struct abbrev_info
*abbrev
;
7156 unsigned int bytes_read
;
7160 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7162 return info_ptr
+ bytes_read
;
7164 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7168 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7169 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7170 abbrev corresponding to that skipped uleb128 should be passed in
7171 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7174 static const gdb_byte
*
7175 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7176 struct abbrev_info
*abbrev
)
7178 unsigned int bytes_read
;
7179 struct attribute attr
;
7180 bfd
*abfd
= reader
->abfd
;
7181 struct dwarf2_cu
*cu
= reader
->cu
;
7182 const gdb_byte
*buffer
= reader
->buffer
;
7183 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7184 const gdb_byte
*start_info_ptr
= info_ptr
;
7185 unsigned int form
, i
;
7187 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7189 /* The only abbrev we care about is DW_AT_sibling. */
7190 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7192 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7193 if (attr
.form
== DW_FORM_ref_addr
)
7194 complaint (&symfile_complaints
,
7195 _("ignoring absolute DW_AT_sibling"));
7198 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7199 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7201 if (sibling_ptr
< info_ptr
)
7202 complaint (&symfile_complaints
,
7203 _("DW_AT_sibling points backwards"));
7204 else if (sibling_ptr
> reader
->buffer_end
)
7205 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7211 /* If it isn't DW_AT_sibling, skip this attribute. */
7212 form
= abbrev
->attrs
[i
].form
;
7216 case DW_FORM_ref_addr
:
7217 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7218 and later it is offset sized. */
7219 if (cu
->header
.version
== 2)
7220 info_ptr
+= cu
->header
.addr_size
;
7222 info_ptr
+= cu
->header
.offset_size
;
7224 case DW_FORM_GNU_ref_alt
:
7225 info_ptr
+= cu
->header
.offset_size
;
7228 info_ptr
+= cu
->header
.addr_size
;
7235 case DW_FORM_flag_present
:
7247 case DW_FORM_ref_sig8
:
7250 case DW_FORM_string
:
7251 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7252 info_ptr
+= bytes_read
;
7254 case DW_FORM_sec_offset
:
7256 case DW_FORM_GNU_strp_alt
:
7257 info_ptr
+= cu
->header
.offset_size
;
7259 case DW_FORM_exprloc
:
7261 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7262 info_ptr
+= bytes_read
;
7264 case DW_FORM_block1
:
7265 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7267 case DW_FORM_block2
:
7268 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7270 case DW_FORM_block4
:
7271 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7275 case DW_FORM_ref_udata
:
7276 case DW_FORM_GNU_addr_index
:
7277 case DW_FORM_GNU_str_index
:
7278 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7280 case DW_FORM_indirect
:
7281 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7282 info_ptr
+= bytes_read
;
7283 /* We need to continue parsing from here, so just go back to
7285 goto skip_attribute
;
7288 error (_("Dwarf Error: Cannot handle %s "
7289 "in DWARF reader [in module %s]"),
7290 dwarf_form_name (form
),
7291 bfd_get_filename (abfd
));
7295 if (abbrev
->has_children
)
7296 return skip_children (reader
, info_ptr
);
7301 /* Locate ORIG_PDI's sibling.
7302 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7304 static const gdb_byte
*
7305 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7306 struct partial_die_info
*orig_pdi
,
7307 const gdb_byte
*info_ptr
)
7309 /* Do we know the sibling already? */
7311 if (orig_pdi
->sibling
)
7312 return orig_pdi
->sibling
;
7314 /* Are there any children to deal with? */
7316 if (!orig_pdi
->has_children
)
7319 /* Skip the children the long way. */
7321 return skip_children (reader
, info_ptr
);
7324 /* Expand this partial symbol table into a full symbol table. SELF is
7328 dwarf2_read_symtab (struct partial_symtab
*self
,
7329 struct objfile
*objfile
)
7333 warning (_("bug: psymtab for %s is already read in."),
7340 printf_filtered (_("Reading in symbols for %s..."),
7342 gdb_flush (gdb_stdout
);
7345 /* Restore our global data. */
7346 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7348 /* If this psymtab is constructed from a debug-only objfile, the
7349 has_section_at_zero flag will not necessarily be correct. We
7350 can get the correct value for this flag by looking at the data
7351 associated with the (presumably stripped) associated objfile. */
7352 if (objfile
->separate_debug_objfile_backlink
)
7354 struct dwarf2_per_objfile
*dpo_backlink
7355 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7356 dwarf2_objfile_data_key
);
7358 dwarf2_per_objfile
->has_section_at_zero
7359 = dpo_backlink
->has_section_at_zero
;
7362 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7364 psymtab_to_symtab_1 (self
);
7366 /* Finish up the debug error message. */
7368 printf_filtered (_("done.\n"));
7371 process_cu_includes ();
7374 /* Reading in full CUs. */
7376 /* Add PER_CU to the queue. */
7379 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7380 enum language pretend_language
)
7382 struct dwarf2_queue_item
*item
;
7385 item
= xmalloc (sizeof (*item
));
7386 item
->per_cu
= per_cu
;
7387 item
->pretend_language
= pretend_language
;
7390 if (dwarf2_queue
== NULL
)
7391 dwarf2_queue
= item
;
7393 dwarf2_queue_tail
->next
= item
;
7395 dwarf2_queue_tail
= item
;
7398 /* If PER_CU is not yet queued, add it to the queue.
7399 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7401 The result is non-zero if PER_CU was queued, otherwise the result is zero
7402 meaning either PER_CU is already queued or it is already loaded.
7404 N.B. There is an invariant here that if a CU is queued then it is loaded.
7405 The caller is required to load PER_CU if we return non-zero. */
7408 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7409 struct dwarf2_per_cu_data
*per_cu
,
7410 enum language pretend_language
)
7412 /* We may arrive here during partial symbol reading, if we need full
7413 DIEs to process an unusual case (e.g. template arguments). Do
7414 not queue PER_CU, just tell our caller to load its DIEs. */
7415 if (dwarf2_per_objfile
->reading_partial_symbols
)
7417 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7422 /* Mark the dependence relation so that we don't flush PER_CU
7424 if (dependent_cu
!= NULL
)
7425 dwarf2_add_dependence (dependent_cu
, per_cu
);
7427 /* If it's already on the queue, we have nothing to do. */
7431 /* If the compilation unit is already loaded, just mark it as
7433 if (per_cu
->cu
!= NULL
)
7435 per_cu
->cu
->last_used
= 0;
7439 /* Add it to the queue. */
7440 queue_comp_unit (per_cu
, pretend_language
);
7445 /* Process the queue. */
7448 process_queue (void)
7450 struct dwarf2_queue_item
*item
, *next_item
;
7452 if (dwarf2_read_debug
)
7454 fprintf_unfiltered (gdb_stdlog
,
7455 "Expanding one or more symtabs of objfile %s ...\n",
7456 objfile_name (dwarf2_per_objfile
->objfile
));
7459 /* The queue starts out with one item, but following a DIE reference
7460 may load a new CU, adding it to the end of the queue. */
7461 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7463 if (dwarf2_per_objfile
->using_index
7464 ? !item
->per_cu
->v
.quick
->compunit_symtab
7465 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7467 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7468 unsigned int debug_print_threshold
;
7471 if (per_cu
->is_debug_types
)
7473 struct signatured_type
*sig_type
=
7474 (struct signatured_type
*) per_cu
;
7476 sprintf (buf
, "TU %s at offset 0x%x",
7477 hex_string (sig_type
->signature
),
7478 per_cu
->offset
.sect_off
);
7479 /* There can be 100s of TUs.
7480 Only print them in verbose mode. */
7481 debug_print_threshold
= 2;
7485 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7486 debug_print_threshold
= 1;
7489 if (dwarf2_read_debug
>= debug_print_threshold
)
7490 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7492 if (per_cu
->is_debug_types
)
7493 process_full_type_unit (per_cu
, item
->pretend_language
);
7495 process_full_comp_unit (per_cu
, item
->pretend_language
);
7497 if (dwarf2_read_debug
>= debug_print_threshold
)
7498 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7501 item
->per_cu
->queued
= 0;
7502 next_item
= item
->next
;
7506 dwarf2_queue_tail
= NULL
;
7508 if (dwarf2_read_debug
)
7510 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7511 objfile_name (dwarf2_per_objfile
->objfile
));
7515 /* Free all allocated queue entries. This function only releases anything if
7516 an error was thrown; if the queue was processed then it would have been
7517 freed as we went along. */
7520 dwarf2_release_queue (void *dummy
)
7522 struct dwarf2_queue_item
*item
, *last
;
7524 item
= dwarf2_queue
;
7527 /* Anything still marked queued is likely to be in an
7528 inconsistent state, so discard it. */
7529 if (item
->per_cu
->queued
)
7531 if (item
->per_cu
->cu
!= NULL
)
7532 free_one_cached_comp_unit (item
->per_cu
);
7533 item
->per_cu
->queued
= 0;
7541 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7544 /* Read in full symbols for PST, and anything it depends on. */
7547 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7549 struct dwarf2_per_cu_data
*per_cu
;
7555 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7556 if (!pst
->dependencies
[i
]->readin
7557 && pst
->dependencies
[i
]->user
== NULL
)
7559 /* Inform about additional files that need to be read in. */
7562 /* FIXME: i18n: Need to make this a single string. */
7563 fputs_filtered (" ", gdb_stdout
);
7565 fputs_filtered ("and ", gdb_stdout
);
7567 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7568 wrap_here (""); /* Flush output. */
7569 gdb_flush (gdb_stdout
);
7571 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7574 per_cu
= pst
->read_symtab_private
;
7578 /* It's an include file, no symbols to read for it.
7579 Everything is in the parent symtab. */
7584 dw2_do_instantiate_symtab (per_cu
);
7587 /* Trivial hash function for die_info: the hash value of a DIE
7588 is its offset in .debug_info for this objfile. */
7591 die_hash (const void *item
)
7593 const struct die_info
*die
= item
;
7595 return die
->offset
.sect_off
;
7598 /* Trivial comparison function for die_info structures: two DIEs
7599 are equal if they have the same offset. */
7602 die_eq (const void *item_lhs
, const void *item_rhs
)
7604 const struct die_info
*die_lhs
= item_lhs
;
7605 const struct die_info
*die_rhs
= item_rhs
;
7607 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7610 /* die_reader_func for load_full_comp_unit.
7611 This is identical to read_signatured_type_reader,
7612 but is kept separate for now. */
7615 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7616 const gdb_byte
*info_ptr
,
7617 struct die_info
*comp_unit_die
,
7621 struct dwarf2_cu
*cu
= reader
->cu
;
7622 enum language
*language_ptr
= data
;
7624 gdb_assert (cu
->die_hash
== NULL
);
7626 htab_create_alloc_ex (cu
->header
.length
/ 12,
7630 &cu
->comp_unit_obstack
,
7631 hashtab_obstack_allocate
,
7632 dummy_obstack_deallocate
);
7635 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7636 &info_ptr
, comp_unit_die
);
7637 cu
->dies
= comp_unit_die
;
7638 /* comp_unit_die is not stored in die_hash, no need. */
7640 /* We try not to read any attributes in this function, because not
7641 all CUs needed for references have been loaded yet, and symbol
7642 table processing isn't initialized. But we have to set the CU language,
7643 or we won't be able to build types correctly.
7644 Similarly, if we do not read the producer, we can not apply
7645 producer-specific interpretation. */
7646 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7649 /* Load the DIEs associated with PER_CU into memory. */
7652 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7653 enum language pretend_language
)
7655 gdb_assert (! this_cu
->is_debug_types
);
7657 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7658 load_full_comp_unit_reader
, &pretend_language
);
7661 /* Add a DIE to the delayed physname list. */
7664 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7665 const char *name
, struct die_info
*die
,
7666 struct dwarf2_cu
*cu
)
7668 struct delayed_method_info mi
;
7670 mi
.fnfield_index
= fnfield_index
;
7674 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7677 /* A cleanup for freeing the delayed method list. */
7680 free_delayed_list (void *ptr
)
7682 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7683 if (cu
->method_list
!= NULL
)
7685 VEC_free (delayed_method_info
, cu
->method_list
);
7686 cu
->method_list
= NULL
;
7690 /* Compute the physnames of any methods on the CU's method list.
7692 The computation of method physnames is delayed in order to avoid the
7693 (bad) condition that one of the method's formal parameters is of an as yet
7697 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7700 struct delayed_method_info
*mi
;
7701 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7703 const char *physname
;
7704 struct fn_fieldlist
*fn_flp
7705 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7706 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7707 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7708 = physname
? physname
: "";
7712 /* Go objects should be embedded in a DW_TAG_module DIE,
7713 and it's not clear if/how imported objects will appear.
7714 To keep Go support simple until that's worked out,
7715 go back through what we've read and create something usable.
7716 We could do this while processing each DIE, and feels kinda cleaner,
7717 but that way is more invasive.
7718 This is to, for example, allow the user to type "p var" or "b main"
7719 without having to specify the package name, and allow lookups
7720 of module.object to work in contexts that use the expression
7724 fixup_go_packaging (struct dwarf2_cu
*cu
)
7726 char *package_name
= NULL
;
7727 struct pending
*list
;
7730 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7732 for (i
= 0; i
< list
->nsyms
; ++i
)
7734 struct symbol
*sym
= list
->symbol
[i
];
7736 if (SYMBOL_LANGUAGE (sym
) == language_go
7737 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7739 char *this_package_name
= go_symbol_package_name (sym
);
7741 if (this_package_name
== NULL
)
7743 if (package_name
== NULL
)
7744 package_name
= this_package_name
;
7747 if (strcmp (package_name
, this_package_name
) != 0)
7748 complaint (&symfile_complaints
,
7749 _("Symtab %s has objects from two different Go packages: %s and %s"),
7750 (symbol_symtab (sym
) != NULL
7751 ? symtab_to_filename_for_display
7752 (symbol_symtab (sym
))
7753 : objfile_name (cu
->objfile
)),
7754 this_package_name
, package_name
);
7755 xfree (this_package_name
);
7761 if (package_name
!= NULL
)
7763 struct objfile
*objfile
= cu
->objfile
;
7764 const char *saved_package_name
7765 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7767 strlen (package_name
));
7768 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7769 saved_package_name
, objfile
);
7772 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7774 sym
= allocate_symbol (objfile
);
7775 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7776 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7777 strlen (saved_package_name
), 0, objfile
);
7778 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7779 e.g., "main" finds the "main" module and not C's main(). */
7780 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7781 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7782 SYMBOL_TYPE (sym
) = type
;
7784 add_symbol_to_list (sym
, &global_symbols
);
7786 xfree (package_name
);
7790 /* Return the symtab for PER_CU. This works properly regardless of
7791 whether we're using the index or psymtabs. */
7793 static struct compunit_symtab
*
7794 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7796 return (dwarf2_per_objfile
->using_index
7797 ? per_cu
->v
.quick
->compunit_symtab
7798 : per_cu
->v
.psymtab
->compunit_symtab
);
7801 /* A helper function for computing the list of all symbol tables
7802 included by PER_CU. */
7805 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7806 htab_t all_children
, htab_t all_type_symtabs
,
7807 struct dwarf2_per_cu_data
*per_cu
,
7808 struct compunit_symtab
*immediate_parent
)
7812 struct compunit_symtab
*cust
;
7813 struct dwarf2_per_cu_data
*iter
;
7815 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7818 /* This inclusion and its children have been processed. */
7823 /* Only add a CU if it has a symbol table. */
7824 cust
= get_compunit_symtab (per_cu
);
7827 /* If this is a type unit only add its symbol table if we haven't
7828 seen it yet (type unit per_cu's can share symtabs). */
7829 if (per_cu
->is_debug_types
)
7831 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7835 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7836 if (cust
->user
== NULL
)
7837 cust
->user
= immediate_parent
;
7842 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7843 if (cust
->user
== NULL
)
7844 cust
->user
= immediate_parent
;
7849 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7852 recursively_compute_inclusions (result
, all_children
,
7853 all_type_symtabs
, iter
, cust
);
7857 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7861 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7863 gdb_assert (! per_cu
->is_debug_types
);
7865 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7868 struct dwarf2_per_cu_data
*per_cu_iter
;
7869 struct compunit_symtab
*compunit_symtab_iter
;
7870 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7871 htab_t all_children
, all_type_symtabs
;
7872 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7874 /* If we don't have a symtab, we can just skip this case. */
7878 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7879 NULL
, xcalloc
, xfree
);
7880 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7881 NULL
, xcalloc
, xfree
);
7884 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7888 recursively_compute_inclusions (&result_symtabs
, all_children
,
7889 all_type_symtabs
, per_cu_iter
,
7893 /* Now we have a transitive closure of all the included symtabs. */
7894 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7896 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7897 (len
+ 1) * sizeof (struct symtab
*));
7899 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7900 compunit_symtab_iter
);
7902 cust
->includes
[ix
] = compunit_symtab_iter
;
7903 cust
->includes
[len
] = NULL
;
7905 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7906 htab_delete (all_children
);
7907 htab_delete (all_type_symtabs
);
7911 /* Compute the 'includes' field for the symtabs of all the CUs we just
7915 process_cu_includes (void)
7918 struct dwarf2_per_cu_data
*iter
;
7921 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7925 if (! iter
->is_debug_types
)
7926 compute_compunit_symtab_includes (iter
);
7929 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7932 /* Generate full symbol information for PER_CU, whose DIEs have
7933 already been loaded into memory. */
7936 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7937 enum language pretend_language
)
7939 struct dwarf2_cu
*cu
= per_cu
->cu
;
7940 struct objfile
*objfile
= per_cu
->objfile
;
7941 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7942 CORE_ADDR lowpc
, highpc
;
7943 struct compunit_symtab
*cust
;
7944 struct cleanup
*back_to
, *delayed_list_cleanup
;
7946 struct block
*static_block
;
7949 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7952 back_to
= make_cleanup (really_free_pendings
, NULL
);
7953 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7955 cu
->list_in_scope
= &file_symbols
;
7957 cu
->language
= pretend_language
;
7958 cu
->language_defn
= language_def (cu
->language
);
7960 /* Do line number decoding in read_file_scope () */
7961 process_die (cu
->dies
, cu
);
7963 /* For now fudge the Go package. */
7964 if (cu
->language
== language_go
)
7965 fixup_go_packaging (cu
);
7967 /* Now that we have processed all the DIEs in the CU, all the types
7968 should be complete, and it should now be safe to compute all of the
7970 compute_delayed_physnames (cu
);
7971 do_cleanups (delayed_list_cleanup
);
7973 /* Some compilers don't define a DW_AT_high_pc attribute for the
7974 compilation unit. If the DW_AT_high_pc is missing, synthesize
7975 it, by scanning the DIE's below the compilation unit. */
7976 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
7978 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
7979 static_block
= end_symtab_get_static_block (addr
, 0, 1);
7981 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
7982 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
7983 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
7984 addrmap to help ensure it has an accurate map of pc values belonging to
7986 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
7988 cust
= end_symtab_from_static_block (static_block
,
7989 SECT_OFF_TEXT (objfile
), 0);
7993 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
7995 /* Set symtab language to language from DW_AT_language. If the
7996 compilation is from a C file generated by language preprocessors, do
7997 not set the language if it was already deduced by start_subfile. */
7998 if (!(cu
->language
== language_c
7999 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8000 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8002 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8003 produce DW_AT_location with location lists but it can be possibly
8004 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8005 there were bugs in prologue debug info, fixed later in GCC-4.5
8006 by "unwind info for epilogues" patch (which is not directly related).
8008 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8009 needed, it would be wrong due to missing DW_AT_producer there.
8011 Still one can confuse GDB by using non-standard GCC compilation
8012 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8014 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8015 cust
->locations_valid
= 1;
8017 if (gcc_4_minor
>= 5)
8018 cust
->epilogue_unwind_valid
= 1;
8020 cust
->call_site_htab
= cu
->call_site_htab
;
8023 if (dwarf2_per_objfile
->using_index
)
8024 per_cu
->v
.quick
->compunit_symtab
= cust
;
8027 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8028 pst
->compunit_symtab
= cust
;
8032 /* Push it for inclusion processing later. */
8033 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8035 do_cleanups (back_to
);
8038 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8039 already been loaded into memory. */
8042 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8043 enum language pretend_language
)
8045 struct dwarf2_cu
*cu
= per_cu
->cu
;
8046 struct objfile
*objfile
= per_cu
->objfile
;
8047 struct compunit_symtab
*cust
;
8048 struct cleanup
*back_to
, *delayed_list_cleanup
;
8049 struct signatured_type
*sig_type
;
8051 gdb_assert (per_cu
->is_debug_types
);
8052 sig_type
= (struct signatured_type
*) per_cu
;
8055 back_to
= make_cleanup (really_free_pendings
, NULL
);
8056 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8058 cu
->list_in_scope
= &file_symbols
;
8060 cu
->language
= pretend_language
;
8061 cu
->language_defn
= language_def (cu
->language
);
8063 /* The symbol tables are set up in read_type_unit_scope. */
8064 process_die (cu
->dies
, cu
);
8066 /* For now fudge the Go package. */
8067 if (cu
->language
== language_go
)
8068 fixup_go_packaging (cu
);
8070 /* Now that we have processed all the DIEs in the CU, all the types
8071 should be complete, and it should now be safe to compute all of the
8073 compute_delayed_physnames (cu
);
8074 do_cleanups (delayed_list_cleanup
);
8076 /* TUs share symbol tables.
8077 If this is the first TU to use this symtab, complete the construction
8078 of it with end_expandable_symtab. Otherwise, complete the addition of
8079 this TU's symbols to the existing symtab. */
8080 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8082 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8083 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8087 /* Set symtab language to language from DW_AT_language. If the
8088 compilation is from a C file generated by language preprocessors,
8089 do not set the language if it was already deduced by
8091 if (!(cu
->language
== language_c
8092 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8093 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8098 augment_type_symtab ();
8099 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8102 if (dwarf2_per_objfile
->using_index
)
8103 per_cu
->v
.quick
->compunit_symtab
= cust
;
8106 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8107 pst
->compunit_symtab
= cust
;
8111 do_cleanups (back_to
);
8114 /* Process an imported unit DIE. */
8117 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8119 struct attribute
*attr
;
8121 /* For now we don't handle imported units in type units. */
8122 if (cu
->per_cu
->is_debug_types
)
8124 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8125 " supported in type units [in module %s]"),
8126 objfile_name (cu
->objfile
));
8129 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8132 struct dwarf2_per_cu_data
*per_cu
;
8133 struct symtab
*imported_symtab
;
8137 offset
= dwarf2_get_ref_die_offset (attr
);
8138 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8139 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8141 /* If necessary, add it to the queue and load its DIEs. */
8142 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8143 load_full_comp_unit (per_cu
, cu
->language
);
8145 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8150 /* Reset the in_process bit of a die. */
8153 reset_die_in_process (void *arg
)
8155 struct die_info
*die
= arg
;
8157 die
->in_process
= 0;
8160 /* Process a die and its children. */
8163 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8165 struct cleanup
*in_process
;
8167 /* We should only be processing those not already in process. */
8168 gdb_assert (!die
->in_process
);
8170 die
->in_process
= 1;
8171 in_process
= make_cleanup (reset_die_in_process
,die
);
8175 case DW_TAG_padding
:
8177 case DW_TAG_compile_unit
:
8178 case DW_TAG_partial_unit
:
8179 read_file_scope (die
, cu
);
8181 case DW_TAG_type_unit
:
8182 read_type_unit_scope (die
, cu
);
8184 case DW_TAG_subprogram
:
8185 case DW_TAG_inlined_subroutine
:
8186 read_func_scope (die
, cu
);
8188 case DW_TAG_lexical_block
:
8189 case DW_TAG_try_block
:
8190 case DW_TAG_catch_block
:
8191 read_lexical_block_scope (die
, cu
);
8193 case DW_TAG_GNU_call_site
:
8194 read_call_site_scope (die
, cu
);
8196 case DW_TAG_class_type
:
8197 case DW_TAG_interface_type
:
8198 case DW_TAG_structure_type
:
8199 case DW_TAG_union_type
:
8200 process_structure_scope (die
, cu
);
8202 case DW_TAG_enumeration_type
:
8203 process_enumeration_scope (die
, cu
);
8206 /* These dies have a type, but processing them does not create
8207 a symbol or recurse to process the children. Therefore we can
8208 read them on-demand through read_type_die. */
8209 case DW_TAG_subroutine_type
:
8210 case DW_TAG_set_type
:
8211 case DW_TAG_array_type
:
8212 case DW_TAG_pointer_type
:
8213 case DW_TAG_ptr_to_member_type
:
8214 case DW_TAG_reference_type
:
8215 case DW_TAG_string_type
:
8218 case DW_TAG_base_type
:
8219 case DW_TAG_subrange_type
:
8220 case DW_TAG_typedef
:
8221 /* Add a typedef symbol for the type definition, if it has a
8223 new_symbol (die
, read_type_die (die
, cu
), cu
);
8225 case DW_TAG_common_block
:
8226 read_common_block (die
, cu
);
8228 case DW_TAG_common_inclusion
:
8230 case DW_TAG_namespace
:
8231 cu
->processing_has_namespace_info
= 1;
8232 read_namespace (die
, cu
);
8235 cu
->processing_has_namespace_info
= 1;
8236 read_module (die
, cu
);
8238 case DW_TAG_imported_declaration
:
8239 cu
->processing_has_namespace_info
= 1;
8240 if (read_namespace_alias (die
, cu
))
8242 /* The declaration is not a global namespace alias: fall through. */
8243 case DW_TAG_imported_module
:
8244 cu
->processing_has_namespace_info
= 1;
8245 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8246 || cu
->language
!= language_fortran
))
8247 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8248 dwarf_tag_name (die
->tag
));
8249 read_import_statement (die
, cu
);
8252 case DW_TAG_imported_unit
:
8253 process_imported_unit_die (die
, cu
);
8257 new_symbol (die
, NULL
, cu
);
8261 do_cleanups (in_process
);
8264 /* DWARF name computation. */
8266 /* A helper function for dwarf2_compute_name which determines whether DIE
8267 needs to have the name of the scope prepended to the name listed in the
8271 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8273 struct attribute
*attr
;
8277 case DW_TAG_namespace
:
8278 case DW_TAG_typedef
:
8279 case DW_TAG_class_type
:
8280 case DW_TAG_interface_type
:
8281 case DW_TAG_structure_type
:
8282 case DW_TAG_union_type
:
8283 case DW_TAG_enumeration_type
:
8284 case DW_TAG_enumerator
:
8285 case DW_TAG_subprogram
:
8287 case DW_TAG_imported_declaration
:
8290 case DW_TAG_variable
:
8291 case DW_TAG_constant
:
8292 /* We only need to prefix "globally" visible variables. These include
8293 any variable marked with DW_AT_external or any variable that
8294 lives in a namespace. [Variables in anonymous namespaces
8295 require prefixing, but they are not DW_AT_external.] */
8297 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8299 struct dwarf2_cu
*spec_cu
= cu
;
8301 return die_needs_namespace (die_specification (die
, &spec_cu
),
8305 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8306 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8307 && die
->parent
->tag
!= DW_TAG_module
)
8309 /* A variable in a lexical block of some kind does not need a
8310 namespace, even though in C++ such variables may be external
8311 and have a mangled name. */
8312 if (die
->parent
->tag
== DW_TAG_lexical_block
8313 || die
->parent
->tag
== DW_TAG_try_block
8314 || die
->parent
->tag
== DW_TAG_catch_block
8315 || die
->parent
->tag
== DW_TAG_subprogram
)
8324 /* Retrieve the last character from a mem_file. */
8327 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8329 char *last_char_p
= (char *) object
;
8332 *last_char_p
= buffer
[length
- 1];
8335 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8336 compute the physname for the object, which include a method's:
8337 - formal parameters (C++/Java),
8338 - receiver type (Go),
8339 - return type (Java).
8341 The term "physname" is a bit confusing.
8342 For C++, for example, it is the demangled name.
8343 For Go, for example, it's the mangled name.
8345 For Ada, return the DIE's linkage name rather than the fully qualified
8346 name. PHYSNAME is ignored..
8348 The result is allocated on the objfile_obstack and canonicalized. */
8351 dwarf2_compute_name (const char *name
,
8352 struct die_info
*die
, struct dwarf2_cu
*cu
,
8355 struct objfile
*objfile
= cu
->objfile
;
8358 name
= dwarf2_name (die
, cu
);
8360 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8361 compute it by typename_concat inside GDB. */
8362 if (cu
->language
== language_ada
8363 || (cu
->language
== language_fortran
&& physname
))
8365 /* For Ada unit, we prefer the linkage name over the name, as
8366 the former contains the exported name, which the user expects
8367 to be able to reference. Ideally, we want the user to be able
8368 to reference this entity using either natural or linkage name,
8369 but we haven't started looking at this enhancement yet. */
8370 struct attribute
*attr
;
8372 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8374 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8375 if (attr
&& DW_STRING (attr
))
8376 return DW_STRING (attr
);
8379 /* These are the only languages we know how to qualify names in. */
8381 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8382 || cu
->language
== language_fortran
))
8384 if (die_needs_namespace (die
, cu
))
8388 struct ui_file
*buf
;
8389 char *intermediate_name
;
8390 const char *canonical_name
= NULL
;
8392 prefix
= determine_prefix (die
, cu
);
8393 buf
= mem_fileopen ();
8394 if (*prefix
!= '\0')
8396 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8399 fputs_unfiltered (prefixed_name
, buf
);
8400 xfree (prefixed_name
);
8403 fputs_unfiltered (name
, buf
);
8405 /* Template parameters may be specified in the DIE's DW_AT_name, or
8406 as children with DW_TAG_template_type_param or
8407 DW_TAG_value_type_param. If the latter, add them to the name
8408 here. If the name already has template parameters, then
8409 skip this step; some versions of GCC emit both, and
8410 it is more efficient to use the pre-computed name.
8412 Something to keep in mind about this process: it is very
8413 unlikely, or in some cases downright impossible, to produce
8414 something that will match the mangled name of a function.
8415 If the definition of the function has the same debug info,
8416 we should be able to match up with it anyway. But fallbacks
8417 using the minimal symbol, for instance to find a method
8418 implemented in a stripped copy of libstdc++, will not work.
8419 If we do not have debug info for the definition, we will have to
8420 match them up some other way.
8422 When we do name matching there is a related problem with function
8423 templates; two instantiated function templates are allowed to
8424 differ only by their return types, which we do not add here. */
8426 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8428 struct attribute
*attr
;
8429 struct die_info
*child
;
8432 die
->building_fullname
= 1;
8434 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8438 const gdb_byte
*bytes
;
8439 struct dwarf2_locexpr_baton
*baton
;
8442 if (child
->tag
!= DW_TAG_template_type_param
8443 && child
->tag
!= DW_TAG_template_value_param
)
8448 fputs_unfiltered ("<", buf
);
8452 fputs_unfiltered (", ", buf
);
8454 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8457 complaint (&symfile_complaints
,
8458 _("template parameter missing DW_AT_type"));
8459 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8462 type
= die_type (child
, cu
);
8464 if (child
->tag
== DW_TAG_template_type_param
)
8466 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8470 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8473 complaint (&symfile_complaints
,
8474 _("template parameter missing "
8475 "DW_AT_const_value"));
8476 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8480 dwarf2_const_value_attr (attr
, type
, name
,
8481 &cu
->comp_unit_obstack
, cu
,
8482 &value
, &bytes
, &baton
);
8484 if (TYPE_NOSIGN (type
))
8485 /* GDB prints characters as NUMBER 'CHAR'. If that's
8486 changed, this can use value_print instead. */
8487 c_printchar (value
, type
, buf
);
8490 struct value_print_options opts
;
8493 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8497 else if (bytes
!= NULL
)
8499 v
= allocate_value (type
);
8500 memcpy (value_contents_writeable (v
), bytes
,
8501 TYPE_LENGTH (type
));
8504 v
= value_from_longest (type
, value
);
8506 /* Specify decimal so that we do not depend on
8508 get_formatted_print_options (&opts
, 'd');
8510 value_print (v
, buf
, &opts
);
8516 die
->building_fullname
= 0;
8520 /* Close the argument list, with a space if necessary
8521 (nested templates). */
8522 char last_char
= '\0';
8523 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8524 if (last_char
== '>')
8525 fputs_unfiltered (" >", buf
);
8527 fputs_unfiltered (">", buf
);
8531 /* For Java and C++ methods, append formal parameter type
8532 information, if PHYSNAME. */
8534 if (physname
&& die
->tag
== DW_TAG_subprogram
8535 && (cu
->language
== language_cplus
8536 || cu
->language
== language_java
))
8538 struct type
*type
= read_type_die (die
, cu
);
8540 c_type_print_args (type
, buf
, 1, cu
->language
,
8541 &type_print_raw_options
);
8543 if (cu
->language
== language_java
)
8545 /* For java, we must append the return type to method
8547 if (die
->tag
== DW_TAG_subprogram
)
8548 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8549 0, 0, &type_print_raw_options
);
8551 else if (cu
->language
== language_cplus
)
8553 /* Assume that an artificial first parameter is
8554 "this", but do not crash if it is not. RealView
8555 marks unnamed (and thus unused) parameters as
8556 artificial; there is no way to differentiate
8558 if (TYPE_NFIELDS (type
) > 0
8559 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8560 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8561 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8563 fputs_unfiltered (" const", buf
);
8567 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8568 ui_file_delete (buf
);
8570 if (cu
->language
== language_cplus
)
8572 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8573 &objfile
->per_bfd
->storage_obstack
);
8575 /* If we only computed INTERMEDIATE_NAME, or if
8576 INTERMEDIATE_NAME is already canonical, then we need to
8577 copy it to the appropriate obstack. */
8578 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8579 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8581 strlen (intermediate_name
));
8583 name
= canonical_name
;
8585 xfree (intermediate_name
);
8592 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8593 If scope qualifiers are appropriate they will be added. The result
8594 will be allocated on the storage_obstack, or NULL if the DIE does
8595 not have a name. NAME may either be from a previous call to
8596 dwarf2_name or NULL.
8598 The output string will be canonicalized (if C++/Java). */
8601 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8603 return dwarf2_compute_name (name
, die
, cu
, 0);
8606 /* Construct a physname for the given DIE in CU. NAME may either be
8607 from a previous call to dwarf2_name or NULL. The result will be
8608 allocated on the objfile_objstack or NULL if the DIE does not have a
8611 The output string will be canonicalized (if C++/Java). */
8614 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8616 struct objfile
*objfile
= cu
->objfile
;
8617 struct attribute
*attr
;
8618 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8619 struct cleanup
*back_to
;
8622 /* In this case dwarf2_compute_name is just a shortcut not building anything
8624 if (!die_needs_namespace (die
, cu
))
8625 return dwarf2_compute_name (name
, die
, cu
, 1);
8627 back_to
= make_cleanup (null_cleanup
, NULL
);
8629 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8631 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8633 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8635 if (attr
&& DW_STRING (attr
))
8639 mangled
= DW_STRING (attr
);
8641 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8642 type. It is easier for GDB users to search for such functions as
8643 `name(params)' than `long name(params)'. In such case the minimal
8644 symbol names do not match the full symbol names but for template
8645 functions there is never a need to look up their definition from their
8646 declaration so the only disadvantage remains the minimal symbol
8647 variant `long name(params)' does not have the proper inferior type.
8650 if (cu
->language
== language_go
)
8652 /* This is a lie, but we already lie to the caller new_symbol_full.
8653 new_symbol_full assumes we return the mangled name.
8654 This just undoes that lie until things are cleaned up. */
8659 demangled
= gdb_demangle (mangled
,
8660 (DMGL_PARAMS
| DMGL_ANSI
8661 | (cu
->language
== language_java
8662 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8667 make_cleanup (xfree
, demangled
);
8677 if (canon
== NULL
|| check_physname
)
8679 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8681 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8683 /* It may not mean a bug in GDB. The compiler could also
8684 compute DW_AT_linkage_name incorrectly. But in such case
8685 GDB would need to be bug-to-bug compatible. */
8687 complaint (&symfile_complaints
,
8688 _("Computed physname <%s> does not match demangled <%s> "
8689 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8690 physname
, canon
, mangled
, die
->offset
.sect_off
,
8691 objfile_name (objfile
));
8693 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8694 is available here - over computed PHYSNAME. It is safer
8695 against both buggy GDB and buggy compilers. */
8709 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8710 retval
, strlen (retval
));
8712 do_cleanups (back_to
);
8716 /* Inspect DIE in CU for a namespace alias. If one exists, record
8717 a new symbol for it.
8719 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8722 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8724 struct attribute
*attr
;
8726 /* If the die does not have a name, this is not a namespace
8728 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8732 struct die_info
*d
= die
;
8733 struct dwarf2_cu
*imported_cu
= cu
;
8735 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8736 keep inspecting DIEs until we hit the underlying import. */
8737 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8738 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8740 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8744 d
= follow_die_ref (d
, attr
, &imported_cu
);
8745 if (d
->tag
!= DW_TAG_imported_declaration
)
8749 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8751 complaint (&symfile_complaints
,
8752 _("DIE at 0x%x has too many recursively imported "
8753 "declarations"), d
->offset
.sect_off
);
8760 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8762 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8763 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8765 /* This declaration is a global namespace alias. Add
8766 a symbol for it whose type is the aliased namespace. */
8767 new_symbol (die
, type
, cu
);
8776 /* Read the import statement specified by the given die and record it. */
8779 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8781 struct objfile
*objfile
= cu
->objfile
;
8782 struct attribute
*import_attr
;
8783 struct die_info
*imported_die
, *child_die
;
8784 struct dwarf2_cu
*imported_cu
;
8785 const char *imported_name
;
8786 const char *imported_name_prefix
;
8787 const char *canonical_name
;
8788 const char *import_alias
;
8789 const char *imported_declaration
= NULL
;
8790 const char *import_prefix
;
8791 VEC (const_char_ptr
) *excludes
= NULL
;
8792 struct cleanup
*cleanups
;
8794 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8795 if (import_attr
== NULL
)
8797 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8798 dwarf_tag_name (die
->tag
));
8803 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8804 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8805 if (imported_name
== NULL
)
8807 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8809 The import in the following code:
8823 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8824 <52> DW_AT_decl_file : 1
8825 <53> DW_AT_decl_line : 6
8826 <54> DW_AT_import : <0x75>
8827 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8829 <5b> DW_AT_decl_file : 1
8830 <5c> DW_AT_decl_line : 2
8831 <5d> DW_AT_type : <0x6e>
8833 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8834 <76> DW_AT_byte_size : 4
8835 <77> DW_AT_encoding : 5 (signed)
8837 imports the wrong die ( 0x75 instead of 0x58 ).
8838 This case will be ignored until the gcc bug is fixed. */
8842 /* Figure out the local name after import. */
8843 import_alias
= dwarf2_name (die
, cu
);
8845 /* Figure out where the statement is being imported to. */
8846 import_prefix
= determine_prefix (die
, cu
);
8848 /* Figure out what the scope of the imported die is and prepend it
8849 to the name of the imported die. */
8850 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8852 if (imported_die
->tag
!= DW_TAG_namespace
8853 && imported_die
->tag
!= DW_TAG_module
)
8855 imported_declaration
= imported_name
;
8856 canonical_name
= imported_name_prefix
;
8858 else if (strlen (imported_name_prefix
) > 0)
8859 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8860 imported_name_prefix
, "::", imported_name
,
8863 canonical_name
= imported_name
;
8865 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8867 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8868 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8869 child_die
= sibling_die (child_die
))
8871 /* DWARF-4: A Fortran use statement with a “rename list” may be
8872 represented by an imported module entry with an import attribute
8873 referring to the module and owned entries corresponding to those
8874 entities that are renamed as part of being imported. */
8876 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8878 complaint (&symfile_complaints
,
8879 _("child DW_TAG_imported_declaration expected "
8880 "- DIE at 0x%x [in module %s]"),
8881 child_die
->offset
.sect_off
, objfile_name (objfile
));
8885 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8886 if (import_attr
== NULL
)
8888 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8889 dwarf_tag_name (child_die
->tag
));
8894 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8896 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8897 if (imported_name
== NULL
)
8899 complaint (&symfile_complaints
,
8900 _("child DW_TAG_imported_declaration has unknown "
8901 "imported name - DIE at 0x%x [in module %s]"),
8902 child_die
->offset
.sect_off
, objfile_name (objfile
));
8906 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8908 process_die (child_die
, cu
);
8911 cp_add_using_directive (import_prefix
,
8914 imported_declaration
,
8917 &objfile
->objfile_obstack
);
8919 do_cleanups (cleanups
);
8922 /* Cleanup function for handle_DW_AT_stmt_list. */
8925 free_cu_line_header (void *arg
)
8927 struct dwarf2_cu
*cu
= arg
;
8929 free_line_header (cu
->line_header
);
8930 cu
->line_header
= NULL
;
8933 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8934 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8935 this, it was first present in GCC release 4.3.0. */
8938 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
8940 if (!cu
->checked_producer
)
8941 check_producer (cu
);
8943 return cu
->producer_is_gcc_lt_4_3
;
8947 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
8948 const char **name
, const char **comp_dir
)
8950 struct attribute
*attr
;
8955 /* Find the filename. Do not use dwarf2_name here, since the filename
8956 is not a source language identifier. */
8957 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8960 *name
= DW_STRING (attr
);
8963 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
8965 *comp_dir
= DW_STRING (attr
);
8966 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
8967 && IS_ABSOLUTE_PATH (*name
))
8969 char *d
= ldirname (*name
);
8973 make_cleanup (xfree
, d
);
8975 if (*comp_dir
!= NULL
)
8977 /* Irix 6.2 native cc prepends <machine>.: to the compilation
8978 directory, get rid of it. */
8979 char *cp
= strchr (*comp_dir
, ':');
8981 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
8986 *name
= "<unknown>";
8989 /* Handle DW_AT_stmt_list for a compilation unit.
8990 DIE is the DW_TAG_compile_unit die for CU.
8991 COMP_DIR is the compilation directory. LOWPC is passed to
8992 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
8995 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
8996 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
8998 struct attribute
*attr
;
9000 gdb_assert (! cu
->per_cu
->is_debug_types
);
9002 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9005 unsigned int line_offset
= DW_UNSND (attr
);
9006 struct line_header
*line_header
9007 = dwarf_decode_line_header (line_offset
, cu
);
9011 cu
->line_header
= line_header
;
9012 make_cleanup (free_cu_line_header
, cu
);
9013 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, lowpc
);
9018 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9021 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9023 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9024 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9025 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9026 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9027 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9028 struct attribute
*attr
;
9029 const char *name
= NULL
;
9030 const char *comp_dir
= NULL
;
9031 struct die_info
*child_die
;
9032 bfd
*abfd
= objfile
->obfd
;
9035 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9037 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9039 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9040 from finish_block. */
9041 if (lowpc
== ((CORE_ADDR
) -1))
9043 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9045 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9047 prepare_one_comp_unit (cu
, die
, cu
->language
);
9049 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9050 standardised yet. As a workaround for the language detection we fall
9051 back to the DW_AT_producer string. */
9052 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9053 cu
->language
= language_opencl
;
9055 /* Similar hack for Go. */
9056 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9057 set_cu_language (DW_LANG_Go
, cu
);
9059 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9061 /* Decode line number information if present. We do this before
9062 processing child DIEs, so that the line header table is available
9063 for DW_AT_decl_file. */
9064 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9066 /* Process all dies in compilation unit. */
9067 if (die
->child
!= NULL
)
9069 child_die
= die
->child
;
9070 while (child_die
&& child_die
->tag
)
9072 process_die (child_die
, cu
);
9073 child_die
= sibling_die (child_die
);
9077 /* Decode macro information, if present. Dwarf 2 macro information
9078 refers to information in the line number info statement program
9079 header, so we can only read it if we've read the header
9081 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9082 if (attr
&& cu
->line_header
)
9084 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9085 complaint (&symfile_complaints
,
9086 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9088 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9092 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9093 if (attr
&& cu
->line_header
)
9095 unsigned int macro_offset
= DW_UNSND (attr
);
9097 dwarf_decode_macros (cu
, macro_offset
, 0);
9101 do_cleanups (back_to
);
9104 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9105 Create the set of symtabs used by this TU, or if this TU is sharing
9106 symtabs with another TU and the symtabs have already been created
9107 then restore those symtabs in the line header.
9108 We don't need the pc/line-number mapping for type units. */
9111 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9113 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9114 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9115 struct type_unit_group
*tu_group
;
9117 struct line_header
*lh
;
9118 struct attribute
*attr
;
9119 unsigned int i
, line_offset
;
9120 struct signatured_type
*sig_type
;
9122 gdb_assert (per_cu
->is_debug_types
);
9123 sig_type
= (struct signatured_type
*) per_cu
;
9125 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9127 /* If we're using .gdb_index (includes -readnow) then
9128 per_cu->type_unit_group may not have been set up yet. */
9129 if (sig_type
->type_unit_group
== NULL
)
9130 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9131 tu_group
= sig_type
->type_unit_group
;
9133 /* If we've already processed this stmt_list there's no real need to
9134 do it again, we could fake it and just recreate the part we need
9135 (file name,index -> symtab mapping). If data shows this optimization
9136 is useful we can do it then. */
9137 first_time
= tu_group
->compunit_symtab
== NULL
;
9139 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9144 line_offset
= DW_UNSND (attr
);
9145 lh
= dwarf_decode_line_header (line_offset
, cu
);
9150 dwarf2_start_symtab (cu
, "", NULL
, 0);
9153 gdb_assert (tu_group
->symtabs
== NULL
);
9154 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9159 cu
->line_header
= lh
;
9160 make_cleanup (free_cu_line_header
, cu
);
9164 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9166 tu_group
->num_symtabs
= lh
->num_file_names
;
9167 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9169 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9171 const char *dir
= NULL
;
9172 struct file_entry
*fe
= &lh
->file_names
[i
];
9175 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9176 dwarf2_start_subfile (fe
->name
, dir
);
9178 if (current_subfile
->symtab
== NULL
)
9180 /* NOTE: start_subfile will recognize when it's been passed
9181 a file it has already seen. So we can't assume there's a
9182 simple mapping from lh->file_names to subfiles, plus
9183 lh->file_names may contain dups. */
9184 current_subfile
->symtab
9185 = allocate_symtab (cust
, current_subfile
->name
);
9188 fe
->symtab
= current_subfile
->symtab
;
9189 tu_group
->symtabs
[i
] = fe
->symtab
;
9194 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9196 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9198 struct file_entry
*fe
= &lh
->file_names
[i
];
9200 fe
->symtab
= tu_group
->symtabs
[i
];
9204 /* The main symtab is allocated last. Type units don't have DW_AT_name
9205 so they don't have a "real" (so to speak) symtab anyway.
9206 There is later code that will assign the main symtab to all symbols
9207 that don't have one. We need to handle the case of a symbol with a
9208 missing symtab (DW_AT_decl_file) anyway. */
9211 /* Process DW_TAG_type_unit.
9212 For TUs we want to skip the first top level sibling if it's not the
9213 actual type being defined by this TU. In this case the first top
9214 level sibling is there to provide context only. */
9217 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9219 struct die_info
*child_die
;
9221 prepare_one_comp_unit (cu
, die
, language_minimal
);
9223 /* Initialize (or reinitialize) the machinery for building symtabs.
9224 We do this before processing child DIEs, so that the line header table
9225 is available for DW_AT_decl_file. */
9226 setup_type_unit_groups (die
, cu
);
9228 if (die
->child
!= NULL
)
9230 child_die
= die
->child
;
9231 while (child_die
&& child_die
->tag
)
9233 process_die (child_die
, cu
);
9234 child_die
= sibling_die (child_die
);
9241 http://gcc.gnu.org/wiki/DebugFission
9242 http://gcc.gnu.org/wiki/DebugFissionDWP
9244 To simplify handling of both DWO files ("object" files with the DWARF info)
9245 and DWP files (a file with the DWOs packaged up into one file), we treat
9246 DWP files as having a collection of virtual DWO files. */
9249 hash_dwo_file (const void *item
)
9251 const struct dwo_file
*dwo_file
= item
;
9254 hash
= htab_hash_string (dwo_file
->dwo_name
);
9255 if (dwo_file
->comp_dir
!= NULL
)
9256 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9261 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9263 const struct dwo_file
*lhs
= item_lhs
;
9264 const struct dwo_file
*rhs
= item_rhs
;
9266 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9268 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9269 return lhs
->comp_dir
== rhs
->comp_dir
;
9270 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9273 /* Allocate a hash table for DWO files. */
9276 allocate_dwo_file_hash_table (void)
9278 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9280 return htab_create_alloc_ex (41,
9284 &objfile
->objfile_obstack
,
9285 hashtab_obstack_allocate
,
9286 dummy_obstack_deallocate
);
9289 /* Lookup DWO file DWO_NAME. */
9292 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9294 struct dwo_file find_entry
;
9297 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9298 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9300 memset (&find_entry
, 0, sizeof (find_entry
));
9301 find_entry
.dwo_name
= dwo_name
;
9302 find_entry
.comp_dir
= comp_dir
;
9303 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9309 hash_dwo_unit (const void *item
)
9311 const struct dwo_unit
*dwo_unit
= item
;
9313 /* This drops the top 32 bits of the id, but is ok for a hash. */
9314 return dwo_unit
->signature
;
9318 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9320 const struct dwo_unit
*lhs
= item_lhs
;
9321 const struct dwo_unit
*rhs
= item_rhs
;
9323 /* The signature is assumed to be unique within the DWO file.
9324 So while object file CU dwo_id's always have the value zero,
9325 that's OK, assuming each object file DWO file has only one CU,
9326 and that's the rule for now. */
9327 return lhs
->signature
== rhs
->signature
;
9330 /* Allocate a hash table for DWO CUs,TUs.
9331 There is one of these tables for each of CUs,TUs for each DWO file. */
9334 allocate_dwo_unit_table (struct objfile
*objfile
)
9336 /* Start out with a pretty small number.
9337 Generally DWO files contain only one CU and maybe some TUs. */
9338 return htab_create_alloc_ex (3,
9342 &objfile
->objfile_obstack
,
9343 hashtab_obstack_allocate
,
9344 dummy_obstack_deallocate
);
9347 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9349 struct create_dwo_cu_data
9351 struct dwo_file
*dwo_file
;
9352 struct dwo_unit dwo_unit
;
9355 /* die_reader_func for create_dwo_cu. */
9358 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9359 const gdb_byte
*info_ptr
,
9360 struct die_info
*comp_unit_die
,
9364 struct dwarf2_cu
*cu
= reader
->cu
;
9365 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9366 sect_offset offset
= cu
->per_cu
->offset
;
9367 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9368 struct create_dwo_cu_data
*data
= datap
;
9369 struct dwo_file
*dwo_file
= data
->dwo_file
;
9370 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9371 struct attribute
*attr
;
9373 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9376 complaint (&symfile_complaints
,
9377 _("Dwarf Error: debug entry at offset 0x%x is missing"
9378 " its dwo_id [in module %s]"),
9379 offset
.sect_off
, dwo_file
->dwo_name
);
9383 dwo_unit
->dwo_file
= dwo_file
;
9384 dwo_unit
->signature
= DW_UNSND (attr
);
9385 dwo_unit
->section
= section
;
9386 dwo_unit
->offset
= offset
;
9387 dwo_unit
->length
= cu
->per_cu
->length
;
9389 if (dwarf2_read_debug
)
9390 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9391 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9394 /* Create the dwo_unit for the lone CU in DWO_FILE.
9395 Note: This function processes DWO files only, not DWP files. */
9397 static struct dwo_unit
*
9398 create_dwo_cu (struct dwo_file
*dwo_file
)
9400 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9401 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9404 const gdb_byte
*info_ptr
, *end_ptr
;
9405 struct create_dwo_cu_data create_dwo_cu_data
;
9406 struct dwo_unit
*dwo_unit
;
9408 dwarf2_read_section (objfile
, section
);
9409 info_ptr
= section
->buffer
;
9411 if (info_ptr
== NULL
)
9414 /* We can't set abfd until now because the section may be empty or
9415 not present, in which case section->asection will be NULL. */
9416 abfd
= get_section_bfd_owner (section
);
9418 if (dwarf2_read_debug
)
9420 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9421 get_section_name (section
),
9422 get_section_file_name (section
));
9425 create_dwo_cu_data
.dwo_file
= dwo_file
;
9428 end_ptr
= info_ptr
+ section
->size
;
9429 while (info_ptr
< end_ptr
)
9431 struct dwarf2_per_cu_data per_cu
;
9433 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9434 sizeof (create_dwo_cu_data
.dwo_unit
));
9435 memset (&per_cu
, 0, sizeof (per_cu
));
9436 per_cu
.objfile
= objfile
;
9437 per_cu
.is_debug_types
= 0;
9438 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9439 per_cu
.section
= section
;
9441 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9442 create_dwo_cu_reader
,
9443 &create_dwo_cu_data
);
9445 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9447 /* If we've already found one, complain. We only support one
9448 because having more than one requires hacking the dwo_name of
9449 each to match, which is highly unlikely to happen. */
9450 if (dwo_unit
!= NULL
)
9452 complaint (&symfile_complaints
,
9453 _("Multiple CUs in DWO file %s [in module %s]"),
9454 dwo_file
->dwo_name
, objfile_name (objfile
));
9458 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9459 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9462 info_ptr
+= per_cu
.length
;
9468 /* DWP file .debug_{cu,tu}_index section format:
9469 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9473 Both index sections have the same format, and serve to map a 64-bit
9474 signature to a set of section numbers. Each section begins with a header,
9475 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9476 indexes, and a pool of 32-bit section numbers. The index sections will be
9477 aligned at 8-byte boundaries in the file.
9479 The index section header consists of:
9481 V, 32 bit version number
9483 N, 32 bit number of compilation units or type units in the index
9484 M, 32 bit number of slots in the hash table
9486 Numbers are recorded using the byte order of the application binary.
9488 The hash table begins at offset 16 in the section, and consists of an array
9489 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9490 order of the application binary). Unused slots in the hash table are 0.
9491 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9493 The parallel table begins immediately after the hash table
9494 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9495 array of 32-bit indexes (using the byte order of the application binary),
9496 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9497 table contains a 32-bit index into the pool of section numbers. For unused
9498 hash table slots, the corresponding entry in the parallel table will be 0.
9500 The pool of section numbers begins immediately following the hash table
9501 (at offset 16 + 12 * M from the beginning of the section). The pool of
9502 section numbers consists of an array of 32-bit words (using the byte order
9503 of the application binary). Each item in the array is indexed starting
9504 from 0. The hash table entry provides the index of the first section
9505 number in the set. Additional section numbers in the set follow, and the
9506 set is terminated by a 0 entry (section number 0 is not used in ELF).
9508 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9509 section must be the first entry in the set, and the .debug_abbrev.dwo must
9510 be the second entry. Other members of the set may follow in any order.
9516 DWP Version 2 combines all the .debug_info, etc. sections into one,
9517 and the entries in the index tables are now offsets into these sections.
9518 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9521 Index Section Contents:
9523 Hash Table of Signatures dwp_hash_table.hash_table
9524 Parallel Table of Indices dwp_hash_table.unit_table
9525 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9526 Table of Section Sizes dwp_hash_table.v2.sizes
9528 The index section header consists of:
9530 V, 32 bit version number
9531 L, 32 bit number of columns in the table of section offsets
9532 N, 32 bit number of compilation units or type units in the index
9533 M, 32 bit number of slots in the hash table
9535 Numbers are recorded using the byte order of the application binary.
9537 The hash table has the same format as version 1.
9538 The parallel table of indices has the same format as version 1,
9539 except that the entries are origin-1 indices into the table of sections
9540 offsets and the table of section sizes.
9542 The table of offsets begins immediately following the parallel table
9543 (at offset 16 + 12 * M from the beginning of the section). The table is
9544 a two-dimensional array of 32-bit words (using the byte order of the
9545 application binary), with L columns and N+1 rows, in row-major order.
9546 Each row in the array is indexed starting from 0. The first row provides
9547 a key to the remaining rows: each column in this row provides an identifier
9548 for a debug section, and the offsets in the same column of subsequent rows
9549 refer to that section. The section identifiers are:
9551 DW_SECT_INFO 1 .debug_info.dwo
9552 DW_SECT_TYPES 2 .debug_types.dwo
9553 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9554 DW_SECT_LINE 4 .debug_line.dwo
9555 DW_SECT_LOC 5 .debug_loc.dwo
9556 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9557 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9558 DW_SECT_MACRO 8 .debug_macro.dwo
9560 The offsets provided by the CU and TU index sections are the base offsets
9561 for the contributions made by each CU or TU to the corresponding section
9562 in the package file. Each CU and TU header contains an abbrev_offset
9563 field, used to find the abbreviations table for that CU or TU within the
9564 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9565 be interpreted as relative to the base offset given in the index section.
9566 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9567 should be interpreted as relative to the base offset for .debug_line.dwo,
9568 and offsets into other debug sections obtained from DWARF attributes should
9569 also be interpreted as relative to the corresponding base offset.
9571 The table of sizes begins immediately following the table of offsets.
9572 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9573 with L columns and N rows, in row-major order. Each row in the array is
9574 indexed starting from 1 (row 0 is shared by the two tables).
9578 Hash table lookup is handled the same in version 1 and 2:
9580 We assume that N and M will not exceed 2^32 - 1.
9581 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9583 Given a 64-bit compilation unit signature or a type signature S, an entry
9584 in the hash table is located as follows:
9586 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9587 the low-order k bits all set to 1.
9589 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9591 3) If the hash table entry at index H matches the signature, use that
9592 entry. If the hash table entry at index H is unused (all zeroes),
9593 terminate the search: the signature is not present in the table.
9595 4) Let H = (H + H') modulo M. Repeat at Step 3.
9597 Because M > N and H' and M are relatively prime, the search is guaranteed
9598 to stop at an unused slot or find the match. */
9600 /* Create a hash table to map DWO IDs to their CU/TU entry in
9601 .debug_{info,types}.dwo in DWP_FILE.
9602 Returns NULL if there isn't one.
9603 Note: This function processes DWP files only, not DWO files. */
9605 static struct dwp_hash_table
*
9606 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9608 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9609 bfd
*dbfd
= dwp_file
->dbfd
;
9610 const gdb_byte
*index_ptr
, *index_end
;
9611 struct dwarf2_section_info
*index
;
9612 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9613 struct dwp_hash_table
*htab
;
9616 index
= &dwp_file
->sections
.tu_index
;
9618 index
= &dwp_file
->sections
.cu_index
;
9620 if (dwarf2_section_empty_p (index
))
9622 dwarf2_read_section (objfile
, index
);
9624 index_ptr
= index
->buffer
;
9625 index_end
= index_ptr
+ index
->size
;
9627 version
= read_4_bytes (dbfd
, index_ptr
);
9630 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9634 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9636 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9639 if (version
!= 1 && version
!= 2)
9641 error (_("Dwarf Error: unsupported DWP file version (%s)"
9643 pulongest (version
), dwp_file
->name
);
9645 if (nr_slots
!= (nr_slots
& -nr_slots
))
9647 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9648 " is not power of 2 [in module %s]"),
9649 pulongest (nr_slots
), dwp_file
->name
);
9652 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9653 htab
->version
= version
;
9654 htab
->nr_columns
= nr_columns
;
9655 htab
->nr_units
= nr_units
;
9656 htab
->nr_slots
= nr_slots
;
9657 htab
->hash_table
= index_ptr
;
9658 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9660 /* Exit early if the table is empty. */
9661 if (nr_slots
== 0 || nr_units
== 0
9662 || (version
== 2 && nr_columns
== 0))
9664 /* All must be zero. */
9665 if (nr_slots
!= 0 || nr_units
!= 0
9666 || (version
== 2 && nr_columns
!= 0))
9668 complaint (&symfile_complaints
,
9669 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9670 " all zero [in modules %s]"),
9678 htab
->section_pool
.v1
.indices
=
9679 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9680 /* It's harder to decide whether the section is too small in v1.
9681 V1 is deprecated anyway so we punt. */
9685 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9686 int *ids
= htab
->section_pool
.v2
.section_ids
;
9687 /* Reverse map for error checking. */
9688 int ids_seen
[DW_SECT_MAX
+ 1];
9693 error (_("Dwarf Error: bad DWP hash table, too few columns"
9694 " in section table [in module %s]"),
9697 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9699 error (_("Dwarf Error: bad DWP hash table, too many columns"
9700 " in section table [in module %s]"),
9703 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9704 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9705 for (i
= 0; i
< nr_columns
; ++i
)
9707 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9709 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9711 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9712 " in section table [in module %s]"),
9713 id
, dwp_file
->name
);
9715 if (ids_seen
[id
] != -1)
9717 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9718 " id %d in section table [in module %s]"),
9719 id
, dwp_file
->name
);
9724 /* Must have exactly one info or types section. */
9725 if (((ids_seen
[DW_SECT_INFO
] != -1)
9726 + (ids_seen
[DW_SECT_TYPES
] != -1))
9729 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9730 " DWO info/types section [in module %s]"),
9733 /* Must have an abbrev section. */
9734 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9736 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9737 " section [in module %s]"),
9740 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9741 htab
->section_pool
.v2
.sizes
=
9742 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9743 * nr_units
* nr_columns
);
9744 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9745 * nr_units
* nr_columns
))
9748 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9757 /* Update SECTIONS with the data from SECTP.
9759 This function is like the other "locate" section routines that are
9760 passed to bfd_map_over_sections, but in this context the sections to
9761 read comes from the DWP V1 hash table, not the full ELF section table.
9763 The result is non-zero for success, or zero if an error was found. */
9766 locate_v1_virtual_dwo_sections (asection
*sectp
,
9767 struct virtual_v1_dwo_sections
*sections
)
9769 const struct dwop_section_names
*names
= &dwop_section_names
;
9771 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9773 /* There can be only one. */
9774 if (sections
->abbrev
.s
.asection
!= NULL
)
9776 sections
->abbrev
.s
.asection
= sectp
;
9777 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9779 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9780 || section_is_p (sectp
->name
, &names
->types_dwo
))
9782 /* There can be only one. */
9783 if (sections
->info_or_types
.s
.asection
!= NULL
)
9785 sections
->info_or_types
.s
.asection
= sectp
;
9786 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9788 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9790 /* There can be only one. */
9791 if (sections
->line
.s
.asection
!= NULL
)
9793 sections
->line
.s
.asection
= sectp
;
9794 sections
->line
.size
= bfd_get_section_size (sectp
);
9796 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9798 /* There can be only one. */
9799 if (sections
->loc
.s
.asection
!= NULL
)
9801 sections
->loc
.s
.asection
= sectp
;
9802 sections
->loc
.size
= bfd_get_section_size (sectp
);
9804 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9806 /* There can be only one. */
9807 if (sections
->macinfo
.s
.asection
!= NULL
)
9809 sections
->macinfo
.s
.asection
= sectp
;
9810 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9812 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9814 /* There can be only one. */
9815 if (sections
->macro
.s
.asection
!= NULL
)
9817 sections
->macro
.s
.asection
= sectp
;
9818 sections
->macro
.size
= bfd_get_section_size (sectp
);
9820 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9822 /* There can be only one. */
9823 if (sections
->str_offsets
.s
.asection
!= NULL
)
9825 sections
->str_offsets
.s
.asection
= sectp
;
9826 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9830 /* No other kind of section is valid. */
9837 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9838 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9839 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9840 This is for DWP version 1 files. */
9842 static struct dwo_unit
*
9843 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9844 uint32_t unit_index
,
9845 const char *comp_dir
,
9846 ULONGEST signature
, int is_debug_types
)
9848 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9849 const struct dwp_hash_table
*dwp_htab
=
9850 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9851 bfd
*dbfd
= dwp_file
->dbfd
;
9852 const char *kind
= is_debug_types
? "TU" : "CU";
9853 struct dwo_file
*dwo_file
;
9854 struct dwo_unit
*dwo_unit
;
9855 struct virtual_v1_dwo_sections sections
;
9856 void **dwo_file_slot
;
9857 char *virtual_dwo_name
;
9858 struct dwarf2_section_info
*cutu
;
9859 struct cleanup
*cleanups
;
9862 gdb_assert (dwp_file
->version
== 1);
9864 if (dwarf2_read_debug
)
9866 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
9868 pulongest (unit_index
), hex_string (signature
),
9872 /* Fetch the sections of this DWO unit.
9873 Put a limit on the number of sections we look for so that bad data
9874 doesn't cause us to loop forever. */
9876 #define MAX_NR_V1_DWO_SECTIONS \
9877 (1 /* .debug_info or .debug_types */ \
9878 + 1 /* .debug_abbrev */ \
9879 + 1 /* .debug_line */ \
9880 + 1 /* .debug_loc */ \
9881 + 1 /* .debug_str_offsets */ \
9882 + 1 /* .debug_macro or .debug_macinfo */ \
9883 + 1 /* trailing zero */)
9885 memset (§ions
, 0, sizeof (sections
));
9886 cleanups
= make_cleanup (null_cleanup
, 0);
9888 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
9891 uint32_t section_nr
=
9893 dwp_htab
->section_pool
.v1
.indices
9894 + (unit_index
+ i
) * sizeof (uint32_t));
9896 if (section_nr
== 0)
9898 if (section_nr
>= dwp_file
->num_sections
)
9900 error (_("Dwarf Error: bad DWP hash table, section number too large"
9905 sectp
= dwp_file
->elf_sections
[section_nr
];
9906 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
9908 error (_("Dwarf Error: bad DWP hash table, invalid section found"
9915 || dwarf2_section_empty_p (§ions
.info_or_types
)
9916 || dwarf2_section_empty_p (§ions
.abbrev
))
9918 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
9922 if (i
== MAX_NR_V1_DWO_SECTIONS
)
9924 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
9929 /* It's easier for the rest of the code if we fake a struct dwo_file and
9930 have dwo_unit "live" in that. At least for now.
9932 The DWP file can be made up of a random collection of CUs and TUs.
9933 However, for each CU + set of TUs that came from the same original DWO
9934 file, we can combine them back into a virtual DWO file to save space
9935 (fewer struct dwo_file objects to allocate). Remember that for really
9936 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
9939 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
9940 get_section_id (§ions
.abbrev
),
9941 get_section_id (§ions
.line
),
9942 get_section_id (§ions
.loc
),
9943 get_section_id (§ions
.str_offsets
));
9944 make_cleanup (xfree
, virtual_dwo_name
);
9945 /* Can we use an existing virtual DWO file? */
9946 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
9947 /* Create one if necessary. */
9948 if (*dwo_file_slot
== NULL
)
9950 if (dwarf2_read_debug
)
9952 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
9955 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
9956 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
9958 strlen (virtual_dwo_name
));
9959 dwo_file
->comp_dir
= comp_dir
;
9960 dwo_file
->sections
.abbrev
= sections
.abbrev
;
9961 dwo_file
->sections
.line
= sections
.line
;
9962 dwo_file
->sections
.loc
= sections
.loc
;
9963 dwo_file
->sections
.macinfo
= sections
.macinfo
;
9964 dwo_file
->sections
.macro
= sections
.macro
;
9965 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
9966 /* The "str" section is global to the entire DWP file. */
9967 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
9968 /* The info or types section is assigned below to dwo_unit,
9969 there's no need to record it in dwo_file.
9970 Also, we can't simply record type sections in dwo_file because
9971 we record a pointer into the vector in dwo_unit. As we collect more
9972 types we'll grow the vector and eventually have to reallocate space
9973 for it, invalidating all copies of pointers into the previous
9975 *dwo_file_slot
= dwo_file
;
9979 if (dwarf2_read_debug
)
9981 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
9984 dwo_file
= *dwo_file_slot
;
9986 do_cleanups (cleanups
);
9988 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9989 dwo_unit
->dwo_file
= dwo_file
;
9990 dwo_unit
->signature
= signature
;
9991 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
9992 sizeof (struct dwarf2_section_info
));
9993 *dwo_unit
->section
= sections
.info_or_types
;
9994 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
9999 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10000 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10001 piece within that section used by a TU/CU, return a virtual section
10002 of just that piece. */
10004 static struct dwarf2_section_info
10005 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10006 bfd_size_type offset
, bfd_size_type size
)
10008 struct dwarf2_section_info result
;
10011 gdb_assert (section
!= NULL
);
10012 gdb_assert (!section
->is_virtual
);
10014 memset (&result
, 0, sizeof (result
));
10015 result
.s
.containing_section
= section
;
10016 result
.is_virtual
= 1;
10021 sectp
= get_section_bfd_section (section
);
10023 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10024 bounds of the real section. This is a pretty-rare event, so just
10025 flag an error (easier) instead of a warning and trying to cope. */
10027 || offset
+ size
> bfd_get_section_size (sectp
))
10029 bfd
*abfd
= sectp
->owner
;
10031 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10032 " in section %s [in module %s]"),
10033 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10034 objfile_name (dwarf2_per_objfile
->objfile
));
10037 result
.virtual_offset
= offset
;
10038 result
.size
= size
;
10042 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10043 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10044 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10045 This is for DWP version 2 files. */
10047 static struct dwo_unit
*
10048 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10049 uint32_t unit_index
,
10050 const char *comp_dir
,
10051 ULONGEST signature
, int is_debug_types
)
10053 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10054 const struct dwp_hash_table
*dwp_htab
=
10055 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10056 bfd
*dbfd
= dwp_file
->dbfd
;
10057 const char *kind
= is_debug_types
? "TU" : "CU";
10058 struct dwo_file
*dwo_file
;
10059 struct dwo_unit
*dwo_unit
;
10060 struct virtual_v2_dwo_sections sections
;
10061 void **dwo_file_slot
;
10062 char *virtual_dwo_name
;
10063 struct dwarf2_section_info
*cutu
;
10064 struct cleanup
*cleanups
;
10067 gdb_assert (dwp_file
->version
== 2);
10069 if (dwarf2_read_debug
)
10071 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10073 pulongest (unit_index
), hex_string (signature
),
10077 /* Fetch the section offsets of this DWO unit. */
10079 memset (§ions
, 0, sizeof (sections
));
10080 cleanups
= make_cleanup (null_cleanup
, 0);
10082 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10084 uint32_t offset
= read_4_bytes (dbfd
,
10085 dwp_htab
->section_pool
.v2
.offsets
10086 + (((unit_index
- 1) * dwp_htab
->nr_columns
10088 * sizeof (uint32_t)));
10089 uint32_t size
= read_4_bytes (dbfd
,
10090 dwp_htab
->section_pool
.v2
.sizes
10091 + (((unit_index
- 1) * dwp_htab
->nr_columns
10093 * sizeof (uint32_t)));
10095 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10098 case DW_SECT_TYPES
:
10099 sections
.info_or_types_offset
= offset
;
10100 sections
.info_or_types_size
= size
;
10102 case DW_SECT_ABBREV
:
10103 sections
.abbrev_offset
= offset
;
10104 sections
.abbrev_size
= size
;
10107 sections
.line_offset
= offset
;
10108 sections
.line_size
= size
;
10111 sections
.loc_offset
= offset
;
10112 sections
.loc_size
= size
;
10114 case DW_SECT_STR_OFFSETS
:
10115 sections
.str_offsets_offset
= offset
;
10116 sections
.str_offsets_size
= size
;
10118 case DW_SECT_MACINFO
:
10119 sections
.macinfo_offset
= offset
;
10120 sections
.macinfo_size
= size
;
10122 case DW_SECT_MACRO
:
10123 sections
.macro_offset
= offset
;
10124 sections
.macro_size
= size
;
10129 /* It's easier for the rest of the code if we fake a struct dwo_file and
10130 have dwo_unit "live" in that. At least for now.
10132 The DWP file can be made up of a random collection of CUs and TUs.
10133 However, for each CU + set of TUs that came from the same original DWO
10134 file, we can combine them back into a virtual DWO file to save space
10135 (fewer struct dwo_file objects to allocate). Remember that for really
10136 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10139 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10140 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10141 (long) (sections
.line_size
? sections
.line_offset
: 0),
10142 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10143 (long) (sections
.str_offsets_size
10144 ? sections
.str_offsets_offset
: 0));
10145 make_cleanup (xfree
, virtual_dwo_name
);
10146 /* Can we use an existing virtual DWO file? */
10147 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10148 /* Create one if necessary. */
10149 if (*dwo_file_slot
== NULL
)
10151 if (dwarf2_read_debug
)
10153 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10156 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10157 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10159 strlen (virtual_dwo_name
));
10160 dwo_file
->comp_dir
= comp_dir
;
10161 dwo_file
->sections
.abbrev
=
10162 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10163 sections
.abbrev_offset
, sections
.abbrev_size
);
10164 dwo_file
->sections
.line
=
10165 create_dwp_v2_section (&dwp_file
->sections
.line
,
10166 sections
.line_offset
, sections
.line_size
);
10167 dwo_file
->sections
.loc
=
10168 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10169 sections
.loc_offset
, sections
.loc_size
);
10170 dwo_file
->sections
.macinfo
=
10171 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10172 sections
.macinfo_offset
, sections
.macinfo_size
);
10173 dwo_file
->sections
.macro
=
10174 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10175 sections
.macro_offset
, sections
.macro_size
);
10176 dwo_file
->sections
.str_offsets
=
10177 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10178 sections
.str_offsets_offset
,
10179 sections
.str_offsets_size
);
10180 /* The "str" section is global to the entire DWP file. */
10181 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10182 /* The info or types section is assigned below to dwo_unit,
10183 there's no need to record it in dwo_file.
10184 Also, we can't simply record type sections in dwo_file because
10185 we record a pointer into the vector in dwo_unit. As we collect more
10186 types we'll grow the vector and eventually have to reallocate space
10187 for it, invalidating all copies of pointers into the previous
10189 *dwo_file_slot
= dwo_file
;
10193 if (dwarf2_read_debug
)
10195 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10198 dwo_file
= *dwo_file_slot
;
10200 do_cleanups (cleanups
);
10202 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10203 dwo_unit
->dwo_file
= dwo_file
;
10204 dwo_unit
->signature
= signature
;
10205 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10206 sizeof (struct dwarf2_section_info
));
10207 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10208 ? &dwp_file
->sections
.types
10209 : &dwp_file
->sections
.info
,
10210 sections
.info_or_types_offset
,
10211 sections
.info_or_types_size
);
10212 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10217 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10218 Returns NULL if the signature isn't found. */
10220 static struct dwo_unit
*
10221 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10222 ULONGEST signature
, int is_debug_types
)
10224 const struct dwp_hash_table
*dwp_htab
=
10225 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10226 bfd
*dbfd
= dwp_file
->dbfd
;
10227 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10228 uint32_t hash
= signature
& mask
;
10229 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10232 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10234 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10235 find_dwo_cu
.signature
= signature
;
10236 slot
= htab_find_slot (is_debug_types
10237 ? dwp_file
->loaded_tus
10238 : dwp_file
->loaded_cus
,
10239 &find_dwo_cu
, INSERT
);
10244 /* Use a for loop so that we don't loop forever on bad debug info. */
10245 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10247 ULONGEST signature_in_table
;
10249 signature_in_table
=
10250 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10251 if (signature_in_table
== signature
)
10253 uint32_t unit_index
=
10254 read_4_bytes (dbfd
,
10255 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10257 if (dwp_file
->version
== 1)
10259 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10260 comp_dir
, signature
,
10265 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10266 comp_dir
, signature
,
10271 if (signature_in_table
== 0)
10273 hash
= (hash
+ hash2
) & mask
;
10276 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10277 " [in module %s]"),
10281 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10282 Open the file specified by FILE_NAME and hand it off to BFD for
10283 preliminary analysis. Return a newly initialized bfd *, which
10284 includes a canonicalized copy of FILE_NAME.
10285 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10286 SEARCH_CWD is true if the current directory is to be searched.
10287 It will be searched before debug-file-directory.
10288 If successful, the file is added to the bfd include table of the
10289 objfile's bfd (see gdb_bfd_record_inclusion).
10290 If unable to find/open the file, return NULL.
10291 NOTE: This function is derived from symfile_bfd_open. */
10294 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10298 char *absolute_name
;
10299 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10300 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10301 to debug_file_directory. */
10303 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10307 if (*debug_file_directory
!= '\0')
10308 search_path
= concat (".", dirname_separator_string
,
10309 debug_file_directory
, NULL
);
10311 search_path
= xstrdup (".");
10314 search_path
= xstrdup (debug_file_directory
);
10316 flags
= OPF_RETURN_REALPATH
;
10318 flags
|= OPF_SEARCH_IN_PATH
;
10319 desc
= openp (search_path
, flags
, file_name
,
10320 O_RDONLY
| O_BINARY
, &absolute_name
);
10321 xfree (search_path
);
10325 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10326 xfree (absolute_name
);
10327 if (sym_bfd
== NULL
)
10329 bfd_set_cacheable (sym_bfd
, 1);
10331 if (!bfd_check_format (sym_bfd
, bfd_object
))
10333 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10337 /* Success. Record the bfd as having been included by the objfile's bfd.
10338 This is important because things like demangled_names_hash lives in the
10339 objfile's per_bfd space and may have references to things like symbol
10340 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10341 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10346 /* Try to open DWO file FILE_NAME.
10347 COMP_DIR is the DW_AT_comp_dir attribute.
10348 The result is the bfd handle of the file.
10349 If there is a problem finding or opening the file, return NULL.
10350 Upon success, the canonicalized path of the file is stored in the bfd,
10351 same as symfile_bfd_open. */
10354 open_dwo_file (const char *file_name
, const char *comp_dir
)
10358 if (IS_ABSOLUTE_PATH (file_name
))
10359 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10361 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10363 if (comp_dir
!= NULL
)
10365 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10367 /* NOTE: If comp_dir is a relative path, this will also try the
10368 search path, which seems useful. */
10369 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10370 xfree (path_to_try
);
10375 /* That didn't work, try debug-file-directory, which, despite its name,
10376 is a list of paths. */
10378 if (*debug_file_directory
== '\0')
10381 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10384 /* This function is mapped across the sections and remembers the offset and
10385 size of each of the DWO debugging sections we are interested in. */
10388 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10390 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10391 const struct dwop_section_names
*names
= &dwop_section_names
;
10393 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10395 dwo_sections
->abbrev
.s
.asection
= sectp
;
10396 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10398 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10400 dwo_sections
->info
.s
.asection
= sectp
;
10401 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10403 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10405 dwo_sections
->line
.s
.asection
= sectp
;
10406 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10408 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10410 dwo_sections
->loc
.s
.asection
= sectp
;
10411 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10413 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10415 dwo_sections
->macinfo
.s
.asection
= sectp
;
10416 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10418 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10420 dwo_sections
->macro
.s
.asection
= sectp
;
10421 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10423 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10425 dwo_sections
->str
.s
.asection
= sectp
;
10426 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10428 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10430 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10431 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10433 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10435 struct dwarf2_section_info type_section
;
10437 memset (&type_section
, 0, sizeof (type_section
));
10438 type_section
.s
.asection
= sectp
;
10439 type_section
.size
= bfd_get_section_size (sectp
);
10440 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10445 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10446 by PER_CU. This is for the non-DWP case.
10447 The result is NULL if DWO_NAME can't be found. */
10449 static struct dwo_file
*
10450 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10451 const char *dwo_name
, const char *comp_dir
)
10453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10454 struct dwo_file
*dwo_file
;
10456 struct cleanup
*cleanups
;
10458 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10461 if (dwarf2_read_debug
)
10462 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10465 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10466 dwo_file
->dwo_name
= dwo_name
;
10467 dwo_file
->comp_dir
= comp_dir
;
10468 dwo_file
->dbfd
= dbfd
;
10470 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10472 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10474 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10476 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10477 dwo_file
->sections
.types
);
10479 discard_cleanups (cleanups
);
10481 if (dwarf2_read_debug
)
10482 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10487 /* This function is mapped across the sections and remembers the offset and
10488 size of each of the DWP debugging sections common to version 1 and 2 that
10489 we are interested in. */
10492 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10493 void *dwp_file_ptr
)
10495 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10496 const struct dwop_section_names
*names
= &dwop_section_names
;
10497 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10499 /* Record the ELF section number for later lookup: this is what the
10500 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10501 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10502 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10504 /* Look for specific sections that we need. */
10505 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10507 dwp_file
->sections
.str
.s
.asection
= sectp
;
10508 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10510 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10512 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10513 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10515 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10517 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10518 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10522 /* This function is mapped across the sections and remembers the offset and
10523 size of each of the DWP version 2 debugging sections that we are interested
10524 in. This is split into a separate function because we don't know if we
10525 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10528 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10530 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10531 const struct dwop_section_names
*names
= &dwop_section_names
;
10532 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10534 /* Record the ELF section number for later lookup: this is what the
10535 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10536 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10537 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10539 /* Look for specific sections that we need. */
10540 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10542 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10543 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10545 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10547 dwp_file
->sections
.info
.s
.asection
= sectp
;
10548 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10550 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10552 dwp_file
->sections
.line
.s
.asection
= sectp
;
10553 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10555 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10557 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10558 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10560 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10562 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10563 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10565 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10567 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10568 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10570 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10572 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10573 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10575 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10577 dwp_file
->sections
.types
.s
.asection
= sectp
;
10578 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10582 /* Hash function for dwp_file loaded CUs/TUs. */
10585 hash_dwp_loaded_cutus (const void *item
)
10587 const struct dwo_unit
*dwo_unit
= item
;
10589 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10590 return dwo_unit
->signature
;
10593 /* Equality function for dwp_file loaded CUs/TUs. */
10596 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10598 const struct dwo_unit
*dua
= a
;
10599 const struct dwo_unit
*dub
= b
;
10601 return dua
->signature
== dub
->signature
;
10604 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10607 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10609 return htab_create_alloc_ex (3,
10610 hash_dwp_loaded_cutus
,
10611 eq_dwp_loaded_cutus
,
10613 &objfile
->objfile_obstack
,
10614 hashtab_obstack_allocate
,
10615 dummy_obstack_deallocate
);
10618 /* Try to open DWP file FILE_NAME.
10619 The result is the bfd handle of the file.
10620 If there is a problem finding or opening the file, return NULL.
10621 Upon success, the canonicalized path of the file is stored in the bfd,
10622 same as symfile_bfd_open. */
10625 open_dwp_file (const char *file_name
)
10629 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10633 /* Work around upstream bug 15652.
10634 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10635 [Whether that's a "bug" is debatable, but it is getting in our way.]
10636 We have no real idea where the dwp file is, because gdb's realpath-ing
10637 of the executable's path may have discarded the needed info.
10638 [IWBN if the dwp file name was recorded in the executable, akin to
10639 .gnu_debuglink, but that doesn't exist yet.]
10640 Strip the directory from FILE_NAME and search again. */
10641 if (*debug_file_directory
!= '\0')
10643 /* Don't implicitly search the current directory here.
10644 If the user wants to search "." to handle this case,
10645 it must be added to debug-file-directory. */
10646 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10653 /* Initialize the use of the DWP file for the current objfile.
10654 By convention the name of the DWP file is ${objfile}.dwp.
10655 The result is NULL if it can't be found. */
10657 static struct dwp_file
*
10658 open_and_init_dwp_file (void)
10660 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10661 struct dwp_file
*dwp_file
;
10664 struct cleanup
*cleanups
;
10666 /* Try to find first .dwp for the binary file before any symbolic links
10668 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10669 cleanups
= make_cleanup (xfree
, dwp_name
);
10671 dbfd
= open_dwp_file (dwp_name
);
10673 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10675 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10676 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10677 make_cleanup (xfree
, dwp_name
);
10678 dbfd
= open_dwp_file (dwp_name
);
10683 if (dwarf2_read_debug
)
10684 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10685 do_cleanups (cleanups
);
10688 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10689 dwp_file
->name
= bfd_get_filename (dbfd
);
10690 dwp_file
->dbfd
= dbfd
;
10691 do_cleanups (cleanups
);
10693 /* +1: section 0 is unused */
10694 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10695 dwp_file
->elf_sections
=
10696 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10697 dwp_file
->num_sections
, asection
*);
10699 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10701 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10703 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10705 /* The DWP file version is stored in the hash table. Oh well. */
10706 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10708 /* Technically speaking, we should try to limp along, but this is
10709 pretty bizarre. We use pulongest here because that's the established
10710 portability solution (e.g, we cannot use %u for uint32_t). */
10711 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10712 " TU version %s [in DWP file %s]"),
10713 pulongest (dwp_file
->cus
->version
),
10714 pulongest (dwp_file
->tus
->version
), dwp_name
);
10716 dwp_file
->version
= dwp_file
->cus
->version
;
10718 if (dwp_file
->version
== 2)
10719 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10721 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10722 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10724 if (dwarf2_read_debug
)
10726 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10727 fprintf_unfiltered (gdb_stdlog
,
10728 " %s CUs, %s TUs\n",
10729 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10730 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10736 /* Wrapper around open_and_init_dwp_file, only open it once. */
10738 static struct dwp_file
*
10739 get_dwp_file (void)
10741 if (! dwarf2_per_objfile
->dwp_checked
)
10743 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10744 dwarf2_per_objfile
->dwp_checked
= 1;
10746 return dwarf2_per_objfile
->dwp_file
;
10749 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10750 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10751 or in the DWP file for the objfile, referenced by THIS_UNIT.
10752 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10753 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10755 This is called, for example, when wanting to read a variable with a
10756 complex location. Therefore we don't want to do file i/o for every call.
10757 Therefore we don't want to look for a DWO file on every call.
10758 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10759 then we check if we've already seen DWO_NAME, and only THEN do we check
10762 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10763 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10765 static struct dwo_unit
*
10766 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10767 const char *dwo_name
, const char *comp_dir
,
10768 ULONGEST signature
, int is_debug_types
)
10770 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10771 const char *kind
= is_debug_types
? "TU" : "CU";
10772 void **dwo_file_slot
;
10773 struct dwo_file
*dwo_file
;
10774 struct dwp_file
*dwp_file
;
10776 /* First see if there's a DWP file.
10777 If we have a DWP file but didn't find the DWO inside it, don't
10778 look for the original DWO file. It makes gdb behave differently
10779 depending on whether one is debugging in the build tree. */
10781 dwp_file
= get_dwp_file ();
10782 if (dwp_file
!= NULL
)
10784 const struct dwp_hash_table
*dwp_htab
=
10785 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10787 if (dwp_htab
!= NULL
)
10789 struct dwo_unit
*dwo_cutu
=
10790 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10791 signature
, is_debug_types
);
10793 if (dwo_cutu
!= NULL
)
10795 if (dwarf2_read_debug
)
10797 fprintf_unfiltered (gdb_stdlog
,
10798 "Virtual DWO %s %s found: @%s\n",
10799 kind
, hex_string (signature
),
10800 host_address_to_string (dwo_cutu
));
10808 /* No DWP file, look for the DWO file. */
10810 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10811 if (*dwo_file_slot
== NULL
)
10813 /* Read in the file and build a table of the CUs/TUs it contains. */
10814 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10816 /* NOTE: This will be NULL if unable to open the file. */
10817 dwo_file
= *dwo_file_slot
;
10819 if (dwo_file
!= NULL
)
10821 struct dwo_unit
*dwo_cutu
= NULL
;
10823 if (is_debug_types
&& dwo_file
->tus
)
10825 struct dwo_unit find_dwo_cutu
;
10827 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10828 find_dwo_cutu
.signature
= signature
;
10829 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10831 else if (!is_debug_types
&& dwo_file
->cu
)
10833 if (signature
== dwo_file
->cu
->signature
)
10834 dwo_cutu
= dwo_file
->cu
;
10837 if (dwo_cutu
!= NULL
)
10839 if (dwarf2_read_debug
)
10841 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10842 kind
, dwo_name
, hex_string (signature
),
10843 host_address_to_string (dwo_cutu
));
10850 /* We didn't find it. This could mean a dwo_id mismatch, or
10851 someone deleted the DWO/DWP file, or the search path isn't set up
10852 correctly to find the file. */
10854 if (dwarf2_read_debug
)
10856 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
10857 kind
, dwo_name
, hex_string (signature
));
10860 /* This is a warning and not a complaint because it can be caused by
10861 pilot error (e.g., user accidentally deleting the DWO). */
10863 /* Print the name of the DWP file if we looked there, helps the user
10864 better diagnose the problem. */
10865 char *dwp_text
= NULL
;
10866 struct cleanup
*cleanups
;
10868 if (dwp_file
!= NULL
)
10869 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
10870 cleanups
= make_cleanup (xfree
, dwp_text
);
10872 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
10873 " [in module %s]"),
10874 kind
, dwo_name
, hex_string (signature
),
10875 dwp_text
!= NULL
? dwp_text
: "",
10876 this_unit
->is_debug_types
? "TU" : "CU",
10877 this_unit
->offset
.sect_off
, objfile_name (objfile
));
10879 do_cleanups (cleanups
);
10884 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
10885 See lookup_dwo_cutu_unit for details. */
10887 static struct dwo_unit
*
10888 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
10889 const char *dwo_name
, const char *comp_dir
,
10890 ULONGEST signature
)
10892 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
10895 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
10896 See lookup_dwo_cutu_unit for details. */
10898 static struct dwo_unit
*
10899 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
10900 const char *dwo_name
, const char *comp_dir
)
10902 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
10905 /* Traversal function for queue_and_load_all_dwo_tus. */
10908 queue_and_load_dwo_tu (void **slot
, void *info
)
10910 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
10911 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
10912 ULONGEST signature
= dwo_unit
->signature
;
10913 struct signatured_type
*sig_type
=
10914 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
10916 if (sig_type
!= NULL
)
10918 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
10920 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
10921 a real dependency of PER_CU on SIG_TYPE. That is detected later
10922 while processing PER_CU. */
10923 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
10924 load_full_type_unit (sig_cu
);
10925 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
10931 /* Queue all TUs contained in the DWO of PER_CU to be read in.
10932 The DWO may have the only definition of the type, though it may not be
10933 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
10934 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
10937 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
10939 struct dwo_unit
*dwo_unit
;
10940 struct dwo_file
*dwo_file
;
10942 gdb_assert (!per_cu
->is_debug_types
);
10943 gdb_assert (get_dwp_file () == NULL
);
10944 gdb_assert (per_cu
->cu
!= NULL
);
10946 dwo_unit
= per_cu
->cu
->dwo_unit
;
10947 gdb_assert (dwo_unit
!= NULL
);
10949 dwo_file
= dwo_unit
->dwo_file
;
10950 if (dwo_file
->tus
!= NULL
)
10951 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
10954 /* Free all resources associated with DWO_FILE.
10955 Close the DWO file and munmap the sections.
10956 All memory should be on the objfile obstack. */
10959 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
10962 struct dwarf2_section_info
*section
;
10964 /* Note: dbfd is NULL for virtual DWO files. */
10965 gdb_bfd_unref (dwo_file
->dbfd
);
10967 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
10970 /* Wrapper for free_dwo_file for use in cleanups. */
10973 free_dwo_file_cleanup (void *arg
)
10975 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
10976 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10978 free_dwo_file (dwo_file
, objfile
);
10981 /* Traversal function for free_dwo_files. */
10984 free_dwo_file_from_slot (void **slot
, void *info
)
10986 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
10987 struct objfile
*objfile
= (struct objfile
*) info
;
10989 free_dwo_file (dwo_file
, objfile
);
10994 /* Free all resources associated with DWO_FILES. */
10997 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
10999 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11002 /* Read in various DIEs. */
11004 /* qsort helper for inherit_abstract_dies. */
11007 unsigned_int_compar (const void *ap
, const void *bp
)
11009 unsigned int a
= *(unsigned int *) ap
;
11010 unsigned int b
= *(unsigned int *) bp
;
11012 return (a
> b
) - (b
> a
);
11015 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11016 Inherit only the children of the DW_AT_abstract_origin DIE not being
11017 already referenced by DW_AT_abstract_origin from the children of the
11021 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11023 struct die_info
*child_die
;
11024 unsigned die_children_count
;
11025 /* CU offsets which were referenced by children of the current DIE. */
11026 sect_offset
*offsets
;
11027 sect_offset
*offsets_end
, *offsetp
;
11028 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11029 struct die_info
*origin_die
;
11030 /* Iterator of the ORIGIN_DIE children. */
11031 struct die_info
*origin_child_die
;
11032 struct cleanup
*cleanups
;
11033 struct attribute
*attr
;
11034 struct dwarf2_cu
*origin_cu
;
11035 struct pending
**origin_previous_list_in_scope
;
11037 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11041 /* Note that following die references may follow to a die in a
11045 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11047 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11049 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11050 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11052 if (die
->tag
!= origin_die
->tag
11053 && !(die
->tag
== DW_TAG_inlined_subroutine
11054 && origin_die
->tag
== DW_TAG_subprogram
))
11055 complaint (&symfile_complaints
,
11056 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11057 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11059 child_die
= die
->child
;
11060 die_children_count
= 0;
11061 while (child_die
&& child_die
->tag
)
11063 child_die
= sibling_die (child_die
);
11064 die_children_count
++;
11066 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11067 cleanups
= make_cleanup (xfree
, offsets
);
11069 offsets_end
= offsets
;
11070 child_die
= die
->child
;
11071 while (child_die
&& child_die
->tag
)
11073 /* For each CHILD_DIE, find the corresponding child of
11074 ORIGIN_DIE. If there is more than one layer of
11075 DW_AT_abstract_origin, follow them all; there shouldn't be,
11076 but GCC versions at least through 4.4 generate this (GCC PR
11078 struct die_info
*child_origin_die
= child_die
;
11079 struct dwarf2_cu
*child_origin_cu
= cu
;
11083 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11087 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11091 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11092 counterpart may exist. */
11093 if (child_origin_die
!= child_die
)
11095 if (child_die
->tag
!= child_origin_die
->tag
11096 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11097 && child_origin_die
->tag
== DW_TAG_subprogram
))
11098 complaint (&symfile_complaints
,
11099 _("Child DIE 0x%x and its abstract origin 0x%x have "
11100 "different tags"), child_die
->offset
.sect_off
,
11101 child_origin_die
->offset
.sect_off
);
11102 if (child_origin_die
->parent
!= origin_die
)
11103 complaint (&symfile_complaints
,
11104 _("Child DIE 0x%x and its abstract origin 0x%x have "
11105 "different parents"), child_die
->offset
.sect_off
,
11106 child_origin_die
->offset
.sect_off
);
11108 *offsets_end
++ = child_origin_die
->offset
;
11110 child_die
= sibling_die (child_die
);
11112 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11113 unsigned_int_compar
);
11114 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11115 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11116 complaint (&symfile_complaints
,
11117 _("Multiple children of DIE 0x%x refer "
11118 "to DIE 0x%x as their abstract origin"),
11119 die
->offset
.sect_off
, offsetp
->sect_off
);
11122 origin_child_die
= origin_die
->child
;
11123 while (origin_child_die
&& origin_child_die
->tag
)
11125 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11126 while (offsetp
< offsets_end
11127 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11129 if (offsetp
>= offsets_end
11130 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11132 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11133 Check whether we're already processing ORIGIN_CHILD_DIE.
11134 This can happen with mutually referenced abstract_origins.
11136 if (!origin_child_die
->in_process
)
11137 process_die (origin_child_die
, origin_cu
);
11139 origin_child_die
= sibling_die (origin_child_die
);
11141 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11143 do_cleanups (cleanups
);
11147 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11149 struct objfile
*objfile
= cu
->objfile
;
11150 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11151 struct context_stack
*new;
11154 struct die_info
*child_die
;
11155 struct attribute
*attr
, *call_line
, *call_file
;
11157 CORE_ADDR baseaddr
;
11158 struct block
*block
;
11159 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11160 VEC (symbolp
) *template_args
= NULL
;
11161 struct template_symbol
*templ_func
= NULL
;
11165 /* If we do not have call site information, we can't show the
11166 caller of this inlined function. That's too confusing, so
11167 only use the scope for local variables. */
11168 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11169 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11170 if (call_line
== NULL
|| call_file
== NULL
)
11172 read_lexical_block_scope (die
, cu
);
11177 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11179 name
= dwarf2_name (die
, cu
);
11181 /* Ignore functions with missing or empty names. These are actually
11182 illegal according to the DWARF standard. */
11185 complaint (&symfile_complaints
,
11186 _("missing name for subprogram DIE at %d"),
11187 die
->offset
.sect_off
);
11191 /* Ignore functions with missing or invalid low and high pc attributes. */
11192 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11194 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11195 if (!attr
|| !DW_UNSND (attr
))
11196 complaint (&symfile_complaints
,
11197 _("cannot get low and high bounds "
11198 "for subprogram DIE at %d"),
11199 die
->offset
.sect_off
);
11203 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11204 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11206 /* If we have any template arguments, then we must allocate a
11207 different sort of symbol. */
11208 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11210 if (child_die
->tag
== DW_TAG_template_type_param
11211 || child_die
->tag
== DW_TAG_template_value_param
)
11213 templ_func
= allocate_template_symbol (objfile
);
11214 templ_func
->base
.is_cplus_template_function
= 1;
11219 new = push_context (0, lowpc
);
11220 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11221 (struct symbol
*) templ_func
);
11223 /* If there is a location expression for DW_AT_frame_base, record
11225 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11227 dwarf2_symbol_mark_computed (attr
, new->name
, cu
, 1);
11229 cu
->list_in_scope
= &local_symbols
;
11231 if (die
->child
!= NULL
)
11233 child_die
= die
->child
;
11234 while (child_die
&& child_die
->tag
)
11236 if (child_die
->tag
== DW_TAG_template_type_param
11237 || child_die
->tag
== DW_TAG_template_value_param
)
11239 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11242 VEC_safe_push (symbolp
, template_args
, arg
);
11245 process_die (child_die
, cu
);
11246 child_die
= sibling_die (child_die
);
11250 inherit_abstract_dies (die
, cu
);
11252 /* If we have a DW_AT_specification, we might need to import using
11253 directives from the context of the specification DIE. See the
11254 comment in determine_prefix. */
11255 if (cu
->language
== language_cplus
11256 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11258 struct dwarf2_cu
*spec_cu
= cu
;
11259 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11263 child_die
= spec_die
->child
;
11264 while (child_die
&& child_die
->tag
)
11266 if (child_die
->tag
== DW_TAG_imported_module
)
11267 process_die (child_die
, spec_cu
);
11268 child_die
= sibling_die (child_die
);
11271 /* In some cases, GCC generates specification DIEs that
11272 themselves contain DW_AT_specification attributes. */
11273 spec_die
= die_specification (spec_die
, &spec_cu
);
11277 new = pop_context ();
11278 /* Make a block for the local symbols within. */
11279 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
11282 /* For C++, set the block's scope. */
11283 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11284 && cu
->processing_has_namespace_info
)
11285 block_set_scope (block
, determine_prefix (die
, cu
),
11286 &objfile
->objfile_obstack
);
11288 /* If we have address ranges, record them. */
11289 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11291 gdbarch_make_symbol_special (gdbarch
, new->name
, objfile
);
11293 /* Attach template arguments to function. */
11294 if (! VEC_empty (symbolp
, template_args
))
11296 gdb_assert (templ_func
!= NULL
);
11298 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11299 templ_func
->template_arguments
11300 = obstack_alloc (&objfile
->objfile_obstack
,
11301 (templ_func
->n_template_arguments
11302 * sizeof (struct symbol
*)));
11303 memcpy (templ_func
->template_arguments
,
11304 VEC_address (symbolp
, template_args
),
11305 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11306 VEC_free (symbolp
, template_args
);
11309 /* In C++, we can have functions nested inside functions (e.g., when
11310 a function declares a class that has methods). This means that
11311 when we finish processing a function scope, we may need to go
11312 back to building a containing block's symbol lists. */
11313 local_symbols
= new->locals
;
11314 using_directives
= new->using_directives
;
11316 /* If we've finished processing a top-level function, subsequent
11317 symbols go in the file symbol list. */
11318 if (outermost_context_p ())
11319 cu
->list_in_scope
= &file_symbols
;
11322 /* Process all the DIES contained within a lexical block scope. Start
11323 a new scope, process the dies, and then close the scope. */
11326 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11328 struct objfile
*objfile
= cu
->objfile
;
11329 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11330 struct context_stack
*new;
11331 CORE_ADDR lowpc
, highpc
;
11332 struct die_info
*child_die
;
11333 CORE_ADDR baseaddr
;
11335 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11337 /* Ignore blocks with missing or invalid low and high pc attributes. */
11338 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11339 as multiple lexical blocks? Handling children in a sane way would
11340 be nasty. Might be easier to properly extend generic blocks to
11341 describe ranges. */
11342 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11344 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11345 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11347 push_context (0, lowpc
);
11348 if (die
->child
!= NULL
)
11350 child_die
= die
->child
;
11351 while (child_die
&& child_die
->tag
)
11353 process_die (child_die
, cu
);
11354 child_die
= sibling_die (child_die
);
11357 new = pop_context ();
11359 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11361 struct block
*block
11362 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
11365 /* Note that recording ranges after traversing children, as we
11366 do here, means that recording a parent's ranges entails
11367 walking across all its children's ranges as they appear in
11368 the address map, which is quadratic behavior.
11370 It would be nicer to record the parent's ranges before
11371 traversing its children, simply overriding whatever you find
11372 there. But since we don't even decide whether to create a
11373 block until after we've traversed its children, that's hard
11375 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11377 local_symbols
= new->locals
;
11378 using_directives
= new->using_directives
;
11381 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11384 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11386 struct objfile
*objfile
= cu
->objfile
;
11387 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11388 CORE_ADDR pc
, baseaddr
;
11389 struct attribute
*attr
;
11390 struct call_site
*call_site
, call_site_local
;
11393 struct die_info
*child_die
;
11395 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11397 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11400 complaint (&symfile_complaints
,
11401 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11402 "DIE 0x%x [in module %s]"),
11403 die
->offset
.sect_off
, objfile_name (objfile
));
11406 pc
= attr_value_as_address (attr
) + baseaddr
;
11407 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11409 if (cu
->call_site_htab
== NULL
)
11410 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11411 NULL
, &objfile
->objfile_obstack
,
11412 hashtab_obstack_allocate
, NULL
);
11413 call_site_local
.pc
= pc
;
11414 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11417 complaint (&symfile_complaints
,
11418 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11419 "DIE 0x%x [in module %s]"),
11420 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11421 objfile_name (objfile
));
11425 /* Count parameters at the caller. */
11428 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11429 child_die
= sibling_die (child_die
))
11431 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11433 complaint (&symfile_complaints
,
11434 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11435 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11436 child_die
->tag
, child_die
->offset
.sect_off
,
11437 objfile_name (objfile
));
11444 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11445 (sizeof (*call_site
)
11446 + (sizeof (*call_site
->parameter
)
11447 * (nparams
- 1))));
11449 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11450 call_site
->pc
= pc
;
11452 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11454 struct die_info
*func_die
;
11456 /* Skip also over DW_TAG_inlined_subroutine. */
11457 for (func_die
= die
->parent
;
11458 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11459 && func_die
->tag
!= DW_TAG_subroutine_type
;
11460 func_die
= func_die
->parent
);
11462 /* DW_AT_GNU_all_call_sites is a superset
11463 of DW_AT_GNU_all_tail_call_sites. */
11465 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11466 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11468 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11469 not complete. But keep CALL_SITE for look ups via call_site_htab,
11470 both the initial caller containing the real return address PC and
11471 the final callee containing the current PC of a chain of tail
11472 calls do not need to have the tail call list complete. But any
11473 function candidate for a virtual tail call frame searched via
11474 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11475 determined unambiguously. */
11479 struct type
*func_type
= NULL
;
11482 func_type
= get_die_type (func_die
, cu
);
11483 if (func_type
!= NULL
)
11485 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11487 /* Enlist this call site to the function. */
11488 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11489 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11492 complaint (&symfile_complaints
,
11493 _("Cannot find function owning DW_TAG_GNU_call_site "
11494 "DIE 0x%x [in module %s]"),
11495 die
->offset
.sect_off
, objfile_name (objfile
));
11499 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11501 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11502 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11503 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11504 /* Keep NULL DWARF_BLOCK. */;
11505 else if (attr_form_is_block (attr
))
11507 struct dwarf2_locexpr_baton
*dlbaton
;
11509 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11510 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11511 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11512 dlbaton
->per_cu
= cu
->per_cu
;
11514 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11516 else if (attr_form_is_ref (attr
))
11518 struct dwarf2_cu
*target_cu
= cu
;
11519 struct die_info
*target_die
;
11521 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11522 gdb_assert (target_cu
->objfile
== objfile
);
11523 if (die_is_declaration (target_die
, target_cu
))
11525 const char *target_physname
= NULL
;
11526 struct attribute
*target_attr
;
11528 /* Prefer the mangled name; otherwise compute the demangled one. */
11529 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11530 if (target_attr
== NULL
)
11531 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11533 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11534 target_physname
= DW_STRING (target_attr
);
11536 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11537 if (target_physname
== NULL
)
11538 complaint (&symfile_complaints
,
11539 _("DW_AT_GNU_call_site_target target DIE has invalid "
11540 "physname, for referencing DIE 0x%x [in module %s]"),
11541 die
->offset
.sect_off
, objfile_name (objfile
));
11543 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11549 /* DW_AT_entry_pc should be preferred. */
11550 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11551 complaint (&symfile_complaints
,
11552 _("DW_AT_GNU_call_site_target target DIE has invalid "
11553 "low pc, for referencing DIE 0x%x [in module %s]"),
11554 die
->offset
.sect_off
, objfile_name (objfile
));
11557 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11558 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11563 complaint (&symfile_complaints
,
11564 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11565 "block nor reference, for DIE 0x%x [in module %s]"),
11566 die
->offset
.sect_off
, objfile_name (objfile
));
11568 call_site
->per_cu
= cu
->per_cu
;
11570 for (child_die
= die
->child
;
11571 child_die
&& child_die
->tag
;
11572 child_die
= sibling_die (child_die
))
11574 struct call_site_parameter
*parameter
;
11575 struct attribute
*loc
, *origin
;
11577 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11579 /* Already printed the complaint above. */
11583 gdb_assert (call_site
->parameter_count
< nparams
);
11584 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11586 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11587 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11588 register is contained in DW_AT_GNU_call_site_value. */
11590 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11591 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11592 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11594 sect_offset offset
;
11596 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11597 offset
= dwarf2_get_ref_die_offset (origin
);
11598 if (!offset_in_cu_p (&cu
->header
, offset
))
11600 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11601 binding can be done only inside one CU. Such referenced DIE
11602 therefore cannot be even moved to DW_TAG_partial_unit. */
11603 complaint (&symfile_complaints
,
11604 _("DW_AT_abstract_origin offset is not in CU for "
11605 "DW_TAG_GNU_call_site child DIE 0x%x "
11607 child_die
->offset
.sect_off
, objfile_name (objfile
));
11610 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11611 - cu
->header
.offset
.sect_off
);
11613 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11615 complaint (&symfile_complaints
,
11616 _("No DW_FORM_block* DW_AT_location for "
11617 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11618 child_die
->offset
.sect_off
, objfile_name (objfile
));
11623 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11624 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11625 if (parameter
->u
.dwarf_reg
!= -1)
11626 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11627 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11628 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11629 ¶meter
->u
.fb_offset
))
11630 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11633 complaint (&symfile_complaints
,
11634 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11635 "for DW_FORM_block* DW_AT_location is supported for "
11636 "DW_TAG_GNU_call_site child DIE 0x%x "
11638 child_die
->offset
.sect_off
, objfile_name (objfile
));
11643 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11644 if (!attr_form_is_block (attr
))
11646 complaint (&symfile_complaints
,
11647 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11648 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11649 child_die
->offset
.sect_off
, objfile_name (objfile
));
11652 parameter
->value
= DW_BLOCK (attr
)->data
;
11653 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11655 /* Parameters are not pre-cleared by memset above. */
11656 parameter
->data_value
= NULL
;
11657 parameter
->data_value_size
= 0;
11658 call_site
->parameter_count
++;
11660 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11663 if (!attr_form_is_block (attr
))
11664 complaint (&symfile_complaints
,
11665 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11666 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11667 child_die
->offset
.sect_off
, objfile_name (objfile
));
11670 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11671 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11677 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11678 Return 1 if the attributes are present and valid, otherwise, return 0.
11679 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11682 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11683 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11684 struct partial_symtab
*ranges_pst
)
11686 struct objfile
*objfile
= cu
->objfile
;
11687 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11688 struct comp_unit_head
*cu_header
= &cu
->header
;
11689 bfd
*obfd
= objfile
->obfd
;
11690 unsigned int addr_size
= cu_header
->addr_size
;
11691 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11692 /* Base address selection entry. */
11695 unsigned int dummy
;
11696 const gdb_byte
*buffer
;
11700 CORE_ADDR high
= 0;
11701 CORE_ADDR baseaddr
;
11703 found_base
= cu
->base_known
;
11704 base
= cu
->base_address
;
11706 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11707 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11709 complaint (&symfile_complaints
,
11710 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11714 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11716 /* Read in the largest possible address. */
11717 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11718 if ((marker
& mask
) == mask
)
11720 /* If we found the largest possible address, then
11721 read the base address. */
11722 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11723 buffer
+= 2 * addr_size
;
11724 offset
+= 2 * addr_size
;
11730 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11734 CORE_ADDR range_beginning
, range_end
;
11736 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11737 buffer
+= addr_size
;
11738 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11739 buffer
+= addr_size
;
11740 offset
+= 2 * addr_size
;
11742 /* An end of list marker is a pair of zero addresses. */
11743 if (range_beginning
== 0 && range_end
== 0)
11744 /* Found the end of list entry. */
11747 /* Each base address selection entry is a pair of 2 values.
11748 The first is the largest possible address, the second is
11749 the base address. Check for a base address here. */
11750 if ((range_beginning
& mask
) == mask
)
11752 /* If we found the largest possible address, then
11753 read the base address. */
11754 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11761 /* We have no valid base address for the ranges
11763 complaint (&symfile_complaints
,
11764 _("Invalid .debug_ranges data (no base address)"));
11768 if (range_beginning
> range_end
)
11770 /* Inverted range entries are invalid. */
11771 complaint (&symfile_complaints
,
11772 _("Invalid .debug_ranges data (inverted range)"));
11776 /* Empty range entries have no effect. */
11777 if (range_beginning
== range_end
)
11780 range_beginning
+= base
;
11783 /* A not-uncommon case of bad debug info.
11784 Don't pollute the addrmap with bad data. */
11785 if (range_beginning
+ baseaddr
== 0
11786 && !dwarf2_per_objfile
->has_section_at_zero
)
11788 complaint (&symfile_complaints
,
11789 _(".debug_ranges entry has start address of zero"
11790 " [in module %s]"), objfile_name (objfile
));
11794 if (ranges_pst
!= NULL
)
11799 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11800 range_beginning
+ baseaddr
);
11801 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11802 range_end
+ baseaddr
);
11803 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11807 /* FIXME: This is recording everything as a low-high
11808 segment of consecutive addresses. We should have a
11809 data structure for discontiguous block ranges
11813 low
= range_beginning
;
11819 if (range_beginning
< low
)
11820 low
= range_beginning
;
11821 if (range_end
> high
)
11827 /* If the first entry is an end-of-list marker, the range
11828 describes an empty scope, i.e. no instructions. */
11834 *high_return
= high
;
11838 /* Get low and high pc attributes from a die. Return 1 if the attributes
11839 are present and valid, otherwise, return 0. Return -1 if the range is
11840 discontinuous, i.e. derived from DW_AT_ranges information. */
11843 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
11844 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
11845 struct partial_symtab
*pst
)
11847 struct attribute
*attr
;
11848 struct attribute
*attr_high
;
11850 CORE_ADDR high
= 0;
11853 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11856 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11859 low
= attr_value_as_address (attr
);
11860 high
= attr_value_as_address (attr_high
);
11861 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
11865 /* Found high w/o low attribute. */
11868 /* Found consecutive range of addresses. */
11873 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
11876 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11877 We take advantage of the fact that DW_AT_ranges does not appear
11878 in DW_TAG_compile_unit of DWO files. */
11879 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
11880 unsigned int ranges_offset
= (DW_UNSND (attr
)
11881 + (need_ranges_base
11885 /* Value of the DW_AT_ranges attribute is the offset in the
11886 .debug_ranges section. */
11887 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
11889 /* Found discontinuous range of addresses. */
11894 /* read_partial_die has also the strict LOW < HIGH requirement. */
11898 /* When using the GNU linker, .gnu.linkonce. sections are used to
11899 eliminate duplicate copies of functions and vtables and such.
11900 The linker will arbitrarily choose one and discard the others.
11901 The AT_*_pc values for such functions refer to local labels in
11902 these sections. If the section from that file was discarded, the
11903 labels are not in the output, so the relocs get a value of 0.
11904 If this is a discarded function, mark the pc bounds as invalid,
11905 so that GDB will ignore it. */
11906 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11915 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
11916 its low and high PC addresses. Do nothing if these addresses could not
11917 be determined. Otherwise, set LOWPC to the low address if it is smaller,
11918 and HIGHPC to the high address if greater than HIGHPC. */
11921 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
11922 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
11923 struct dwarf2_cu
*cu
)
11925 CORE_ADDR low
, high
;
11926 struct die_info
*child
= die
->child
;
11928 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
11930 *lowpc
= min (*lowpc
, low
);
11931 *highpc
= max (*highpc
, high
);
11934 /* If the language does not allow nested subprograms (either inside
11935 subprograms or lexical blocks), we're done. */
11936 if (cu
->language
!= language_ada
)
11939 /* Check all the children of the given DIE. If it contains nested
11940 subprograms, then check their pc bounds. Likewise, we need to
11941 check lexical blocks as well, as they may also contain subprogram
11943 while (child
&& child
->tag
)
11945 if (child
->tag
== DW_TAG_subprogram
11946 || child
->tag
== DW_TAG_lexical_block
)
11947 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
11948 child
= sibling_die (child
);
11952 /* Get the low and high pc's represented by the scope DIE, and store
11953 them in *LOWPC and *HIGHPC. If the correct values can't be
11954 determined, set *LOWPC to -1 and *HIGHPC to 0. */
11957 get_scope_pc_bounds (struct die_info
*die
,
11958 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
11959 struct dwarf2_cu
*cu
)
11961 CORE_ADDR best_low
= (CORE_ADDR
) -1;
11962 CORE_ADDR best_high
= (CORE_ADDR
) 0;
11963 CORE_ADDR current_low
, current_high
;
11965 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
11967 best_low
= current_low
;
11968 best_high
= current_high
;
11972 struct die_info
*child
= die
->child
;
11974 while (child
&& child
->tag
)
11976 switch (child
->tag
) {
11977 case DW_TAG_subprogram
:
11978 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
11980 case DW_TAG_namespace
:
11981 case DW_TAG_module
:
11982 /* FIXME: carlton/2004-01-16: Should we do this for
11983 DW_TAG_class_type/DW_TAG_structure_type, too? I think
11984 that current GCC's always emit the DIEs corresponding
11985 to definitions of methods of classes as children of a
11986 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
11987 the DIEs giving the declarations, which could be
11988 anywhere). But I don't see any reason why the
11989 standards says that they have to be there. */
11990 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
11992 if (current_low
!= ((CORE_ADDR
) -1))
11994 best_low
= min (best_low
, current_low
);
11995 best_high
= max (best_high
, current_high
);
12003 child
= sibling_die (child
);
12008 *highpc
= best_high
;
12011 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12015 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12016 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12018 struct objfile
*objfile
= cu
->objfile
;
12019 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12020 struct attribute
*attr
;
12021 struct attribute
*attr_high
;
12023 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12026 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12029 CORE_ADDR low
= attr_value_as_address (attr
);
12030 CORE_ADDR high
= attr_value_as_address (attr_high
);
12032 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12035 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12036 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12037 record_block_range (block
, low
, high
- 1);
12041 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12044 bfd
*obfd
= objfile
->obfd
;
12045 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12046 We take advantage of the fact that DW_AT_ranges does not appear
12047 in DW_TAG_compile_unit of DWO files. */
12048 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12050 /* The value of the DW_AT_ranges attribute is the offset of the
12051 address range list in the .debug_ranges section. */
12052 unsigned long offset
= (DW_UNSND (attr
)
12053 + (need_ranges_base
? cu
->ranges_base
: 0));
12054 const gdb_byte
*buffer
;
12056 /* For some target architectures, but not others, the
12057 read_address function sign-extends the addresses it returns.
12058 To recognize base address selection entries, we need a
12060 unsigned int addr_size
= cu
->header
.addr_size
;
12061 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12063 /* The base address, to which the next pair is relative. Note
12064 that this 'base' is a DWARF concept: most entries in a range
12065 list are relative, to reduce the number of relocs against the
12066 debugging information. This is separate from this function's
12067 'baseaddr' argument, which GDB uses to relocate debugging
12068 information from a shared library based on the address at
12069 which the library was loaded. */
12070 CORE_ADDR base
= cu
->base_address
;
12071 int base_known
= cu
->base_known
;
12073 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12074 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12076 complaint (&symfile_complaints
,
12077 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12081 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12085 unsigned int bytes_read
;
12086 CORE_ADDR start
, end
;
12088 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12089 buffer
+= bytes_read
;
12090 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12091 buffer
+= bytes_read
;
12093 /* Did we find the end of the range list? */
12094 if (start
== 0 && end
== 0)
12097 /* Did we find a base address selection entry? */
12098 else if ((start
& base_select_mask
) == base_select_mask
)
12104 /* We found an ordinary address range. */
12109 complaint (&symfile_complaints
,
12110 _("Invalid .debug_ranges data "
12111 "(no base address)"));
12117 /* Inverted range entries are invalid. */
12118 complaint (&symfile_complaints
,
12119 _("Invalid .debug_ranges data "
12120 "(inverted range)"));
12124 /* Empty range entries have no effect. */
12128 start
+= base
+ baseaddr
;
12129 end
+= base
+ baseaddr
;
12131 /* A not-uncommon case of bad debug info.
12132 Don't pollute the addrmap with bad data. */
12133 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12135 complaint (&symfile_complaints
,
12136 _(".debug_ranges entry has start address of zero"
12137 " [in module %s]"), objfile_name (objfile
));
12141 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12142 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12143 record_block_range (block
, start
, end
- 1);
12149 /* Check whether the producer field indicates either of GCC < 4.6, or the
12150 Intel C/C++ compiler, and cache the result in CU. */
12153 check_producer (struct dwarf2_cu
*cu
)
12156 int major
, minor
, release
;
12158 if (cu
->producer
== NULL
)
12160 /* For unknown compilers expect their behavior is DWARF version
12163 GCC started to support .debug_types sections by -gdwarf-4 since
12164 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12165 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12166 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12167 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12169 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
12171 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
12173 cs
= &cu
->producer
[strlen ("GNU ")];
12174 while (*cs
&& !isdigit (*cs
))
12176 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
12178 /* Not recognized as GCC. */
12182 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12183 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12186 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
12187 cu
->producer_is_icc
= 1;
12190 /* For other non-GCC compilers, expect their behavior is DWARF version
12194 cu
->checked_producer
= 1;
12197 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12198 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12199 during 4.6.0 experimental. */
12202 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12204 if (!cu
->checked_producer
)
12205 check_producer (cu
);
12207 return cu
->producer_is_gxx_lt_4_6
;
12210 /* Return the default accessibility type if it is not overriden by
12211 DW_AT_accessibility. */
12213 static enum dwarf_access_attribute
12214 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12216 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12218 /* The default DWARF 2 accessibility for members is public, the default
12219 accessibility for inheritance is private. */
12221 if (die
->tag
!= DW_TAG_inheritance
)
12222 return DW_ACCESS_public
;
12224 return DW_ACCESS_private
;
12228 /* DWARF 3+ defines the default accessibility a different way. The same
12229 rules apply now for DW_TAG_inheritance as for the members and it only
12230 depends on the container kind. */
12232 if (die
->parent
->tag
== DW_TAG_class_type
)
12233 return DW_ACCESS_private
;
12235 return DW_ACCESS_public
;
12239 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12240 offset. If the attribute was not found return 0, otherwise return
12241 1. If it was found but could not properly be handled, set *OFFSET
12245 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12248 struct attribute
*attr
;
12250 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12255 /* Note that we do not check for a section offset first here.
12256 This is because DW_AT_data_member_location is new in DWARF 4,
12257 so if we see it, we can assume that a constant form is really
12258 a constant and not a section offset. */
12259 if (attr_form_is_constant (attr
))
12260 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12261 else if (attr_form_is_section_offset (attr
))
12262 dwarf2_complex_location_expr_complaint ();
12263 else if (attr_form_is_block (attr
))
12264 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12266 dwarf2_complex_location_expr_complaint ();
12274 /* Add an aggregate field to the field list. */
12277 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12278 struct dwarf2_cu
*cu
)
12280 struct objfile
*objfile
= cu
->objfile
;
12281 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12282 struct nextfield
*new_field
;
12283 struct attribute
*attr
;
12285 const char *fieldname
= "";
12287 /* Allocate a new field list entry and link it in. */
12288 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12289 make_cleanup (xfree
, new_field
);
12290 memset (new_field
, 0, sizeof (struct nextfield
));
12292 if (die
->tag
== DW_TAG_inheritance
)
12294 new_field
->next
= fip
->baseclasses
;
12295 fip
->baseclasses
= new_field
;
12299 new_field
->next
= fip
->fields
;
12300 fip
->fields
= new_field
;
12304 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12306 new_field
->accessibility
= DW_UNSND (attr
);
12308 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12309 if (new_field
->accessibility
!= DW_ACCESS_public
)
12310 fip
->non_public_fields
= 1;
12312 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12314 new_field
->virtuality
= DW_UNSND (attr
);
12316 new_field
->virtuality
= DW_VIRTUALITY_none
;
12318 fp
= &new_field
->field
;
12320 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12324 /* Data member other than a C++ static data member. */
12326 /* Get type of field. */
12327 fp
->type
= die_type (die
, cu
);
12329 SET_FIELD_BITPOS (*fp
, 0);
12331 /* Get bit size of field (zero if none). */
12332 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12335 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12339 FIELD_BITSIZE (*fp
) = 0;
12342 /* Get bit offset of field. */
12343 if (handle_data_member_location (die
, cu
, &offset
))
12344 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12345 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12348 if (gdbarch_bits_big_endian (gdbarch
))
12350 /* For big endian bits, the DW_AT_bit_offset gives the
12351 additional bit offset from the MSB of the containing
12352 anonymous object to the MSB of the field. We don't
12353 have to do anything special since we don't need to
12354 know the size of the anonymous object. */
12355 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12359 /* For little endian bits, compute the bit offset to the
12360 MSB of the anonymous object, subtract off the number of
12361 bits from the MSB of the field to the MSB of the
12362 object, and then subtract off the number of bits of
12363 the field itself. The result is the bit offset of
12364 the LSB of the field. */
12365 int anonymous_size
;
12366 int bit_offset
= DW_UNSND (attr
);
12368 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12371 /* The size of the anonymous object containing
12372 the bit field is explicit, so use the
12373 indicated size (in bytes). */
12374 anonymous_size
= DW_UNSND (attr
);
12378 /* The size of the anonymous object containing
12379 the bit field must be inferred from the type
12380 attribute of the data member containing the
12382 anonymous_size
= TYPE_LENGTH (fp
->type
);
12384 SET_FIELD_BITPOS (*fp
,
12385 (FIELD_BITPOS (*fp
)
12386 + anonymous_size
* bits_per_byte
12387 - bit_offset
- FIELD_BITSIZE (*fp
)));
12391 /* Get name of field. */
12392 fieldname
= dwarf2_name (die
, cu
);
12393 if (fieldname
== NULL
)
12396 /* The name is already allocated along with this objfile, so we don't
12397 need to duplicate it for the type. */
12398 fp
->name
= fieldname
;
12400 /* Change accessibility for artificial fields (e.g. virtual table
12401 pointer or virtual base class pointer) to private. */
12402 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12404 FIELD_ARTIFICIAL (*fp
) = 1;
12405 new_field
->accessibility
= DW_ACCESS_private
;
12406 fip
->non_public_fields
= 1;
12409 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12411 /* C++ static member. */
12413 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12414 is a declaration, but all versions of G++ as of this writing
12415 (so through at least 3.2.1) incorrectly generate
12416 DW_TAG_variable tags. */
12418 const char *physname
;
12420 /* Get name of field. */
12421 fieldname
= dwarf2_name (die
, cu
);
12422 if (fieldname
== NULL
)
12425 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12427 /* Only create a symbol if this is an external value.
12428 new_symbol checks this and puts the value in the global symbol
12429 table, which we want. If it is not external, new_symbol
12430 will try to put the value in cu->list_in_scope which is wrong. */
12431 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12433 /* A static const member, not much different than an enum as far as
12434 we're concerned, except that we can support more types. */
12435 new_symbol (die
, NULL
, cu
);
12438 /* Get physical name. */
12439 physname
= dwarf2_physname (fieldname
, die
, cu
);
12441 /* The name is already allocated along with this objfile, so we don't
12442 need to duplicate it for the type. */
12443 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12444 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12445 FIELD_NAME (*fp
) = fieldname
;
12447 else if (die
->tag
== DW_TAG_inheritance
)
12451 /* C++ base class field. */
12452 if (handle_data_member_location (die
, cu
, &offset
))
12453 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12454 FIELD_BITSIZE (*fp
) = 0;
12455 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12456 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12457 fip
->nbaseclasses
++;
12461 /* Add a typedef defined in the scope of the FIP's class. */
12464 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12465 struct dwarf2_cu
*cu
)
12467 struct objfile
*objfile
= cu
->objfile
;
12468 struct typedef_field_list
*new_field
;
12469 struct attribute
*attr
;
12470 struct typedef_field
*fp
;
12471 char *fieldname
= "";
12473 /* Allocate a new field list entry and link it in. */
12474 new_field
= xzalloc (sizeof (*new_field
));
12475 make_cleanup (xfree
, new_field
);
12477 gdb_assert (die
->tag
== DW_TAG_typedef
);
12479 fp
= &new_field
->field
;
12481 /* Get name of field. */
12482 fp
->name
= dwarf2_name (die
, cu
);
12483 if (fp
->name
== NULL
)
12486 fp
->type
= read_type_die (die
, cu
);
12488 new_field
->next
= fip
->typedef_field_list
;
12489 fip
->typedef_field_list
= new_field
;
12490 fip
->typedef_field_list_count
++;
12493 /* Create the vector of fields, and attach it to the type. */
12496 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12497 struct dwarf2_cu
*cu
)
12499 int nfields
= fip
->nfields
;
12501 /* Record the field count, allocate space for the array of fields,
12502 and create blank accessibility bitfields if necessary. */
12503 TYPE_NFIELDS (type
) = nfields
;
12504 TYPE_FIELDS (type
) = (struct field
*)
12505 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12506 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12508 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12510 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12512 TYPE_FIELD_PRIVATE_BITS (type
) =
12513 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12514 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12516 TYPE_FIELD_PROTECTED_BITS (type
) =
12517 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12518 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12520 TYPE_FIELD_IGNORE_BITS (type
) =
12521 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12522 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12525 /* If the type has baseclasses, allocate and clear a bit vector for
12526 TYPE_FIELD_VIRTUAL_BITS. */
12527 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12529 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12530 unsigned char *pointer
;
12532 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12533 pointer
= TYPE_ALLOC (type
, num_bytes
);
12534 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12535 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12536 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12539 /* Copy the saved-up fields into the field vector. Start from the head of
12540 the list, adding to the tail of the field array, so that they end up in
12541 the same order in the array in which they were added to the list. */
12542 while (nfields
-- > 0)
12544 struct nextfield
*fieldp
;
12548 fieldp
= fip
->fields
;
12549 fip
->fields
= fieldp
->next
;
12553 fieldp
= fip
->baseclasses
;
12554 fip
->baseclasses
= fieldp
->next
;
12557 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12558 switch (fieldp
->accessibility
)
12560 case DW_ACCESS_private
:
12561 if (cu
->language
!= language_ada
)
12562 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12565 case DW_ACCESS_protected
:
12566 if (cu
->language
!= language_ada
)
12567 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12570 case DW_ACCESS_public
:
12574 /* Unknown accessibility. Complain and treat it as public. */
12576 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12577 fieldp
->accessibility
);
12581 if (nfields
< fip
->nbaseclasses
)
12583 switch (fieldp
->virtuality
)
12585 case DW_VIRTUALITY_virtual
:
12586 case DW_VIRTUALITY_pure_virtual
:
12587 if (cu
->language
== language_ada
)
12588 error (_("unexpected virtuality in component of Ada type"));
12589 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12596 /* Return true if this member function is a constructor, false
12600 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12602 const char *fieldname
;
12603 const char *typename
;
12606 if (die
->parent
== NULL
)
12609 if (die
->parent
->tag
!= DW_TAG_structure_type
12610 && die
->parent
->tag
!= DW_TAG_union_type
12611 && die
->parent
->tag
!= DW_TAG_class_type
)
12614 fieldname
= dwarf2_name (die
, cu
);
12615 typename
= dwarf2_name (die
->parent
, cu
);
12616 if (fieldname
== NULL
|| typename
== NULL
)
12619 len
= strlen (fieldname
);
12620 return (strncmp (fieldname
, typename
, len
) == 0
12621 && (typename
[len
] == '\0' || typename
[len
] == '<'));
12624 /* Add a member function to the proper fieldlist. */
12627 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12628 struct type
*type
, struct dwarf2_cu
*cu
)
12630 struct objfile
*objfile
= cu
->objfile
;
12631 struct attribute
*attr
;
12632 struct fnfieldlist
*flp
;
12634 struct fn_field
*fnp
;
12635 const char *fieldname
;
12636 struct nextfnfield
*new_fnfield
;
12637 struct type
*this_type
;
12638 enum dwarf_access_attribute accessibility
;
12640 if (cu
->language
== language_ada
)
12641 error (_("unexpected member function in Ada type"));
12643 /* Get name of member function. */
12644 fieldname
= dwarf2_name (die
, cu
);
12645 if (fieldname
== NULL
)
12648 /* Look up member function name in fieldlist. */
12649 for (i
= 0; i
< fip
->nfnfields
; i
++)
12651 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12655 /* Create new list element if necessary. */
12656 if (i
< fip
->nfnfields
)
12657 flp
= &fip
->fnfieldlists
[i
];
12660 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12662 fip
->fnfieldlists
= (struct fnfieldlist
*)
12663 xrealloc (fip
->fnfieldlists
,
12664 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12665 * sizeof (struct fnfieldlist
));
12666 if (fip
->nfnfields
== 0)
12667 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12669 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12670 flp
->name
= fieldname
;
12673 i
= fip
->nfnfields
++;
12676 /* Create a new member function field and chain it to the field list
12678 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12679 make_cleanup (xfree
, new_fnfield
);
12680 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12681 new_fnfield
->next
= flp
->head
;
12682 flp
->head
= new_fnfield
;
12685 /* Fill in the member function field info. */
12686 fnp
= &new_fnfield
->fnfield
;
12688 /* Delay processing of the physname until later. */
12689 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12691 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12696 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12697 fnp
->physname
= physname
? physname
: "";
12700 fnp
->type
= alloc_type (objfile
);
12701 this_type
= read_type_die (die
, cu
);
12702 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12704 int nparams
= TYPE_NFIELDS (this_type
);
12706 /* TYPE is the domain of this method, and THIS_TYPE is the type
12707 of the method itself (TYPE_CODE_METHOD). */
12708 smash_to_method_type (fnp
->type
, type
,
12709 TYPE_TARGET_TYPE (this_type
),
12710 TYPE_FIELDS (this_type
),
12711 TYPE_NFIELDS (this_type
),
12712 TYPE_VARARGS (this_type
));
12714 /* Handle static member functions.
12715 Dwarf2 has no clean way to discern C++ static and non-static
12716 member functions. G++ helps GDB by marking the first
12717 parameter for non-static member functions (which is the this
12718 pointer) as artificial. We obtain this information from
12719 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12720 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12721 fnp
->voffset
= VOFFSET_STATIC
;
12724 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12725 dwarf2_full_name (fieldname
, die
, cu
));
12727 /* Get fcontext from DW_AT_containing_type if present. */
12728 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12729 fnp
->fcontext
= die_containing_type (die
, cu
);
12731 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12732 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12734 /* Get accessibility. */
12735 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12737 accessibility
= DW_UNSND (attr
);
12739 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12740 switch (accessibility
)
12742 case DW_ACCESS_private
:
12743 fnp
->is_private
= 1;
12745 case DW_ACCESS_protected
:
12746 fnp
->is_protected
= 1;
12750 /* Check for artificial methods. */
12751 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12752 if (attr
&& DW_UNSND (attr
) != 0)
12753 fnp
->is_artificial
= 1;
12755 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12757 /* Get index in virtual function table if it is a virtual member
12758 function. For older versions of GCC, this is an offset in the
12759 appropriate virtual table, as specified by DW_AT_containing_type.
12760 For everyone else, it is an expression to be evaluated relative
12761 to the object address. */
12763 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12766 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12768 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12770 /* Old-style GCC. */
12771 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12773 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12774 || (DW_BLOCK (attr
)->size
> 1
12775 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12776 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12778 struct dwarf_block blk
;
12781 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12783 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12784 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12785 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12786 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12787 dwarf2_complex_location_expr_complaint ();
12789 fnp
->voffset
/= cu
->header
.addr_size
;
12793 dwarf2_complex_location_expr_complaint ();
12795 if (!fnp
->fcontext
)
12796 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12798 else if (attr_form_is_section_offset (attr
))
12800 dwarf2_complex_location_expr_complaint ();
12804 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12810 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12811 if (attr
&& DW_UNSND (attr
))
12813 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12814 complaint (&symfile_complaints
,
12815 _("Member function \"%s\" (offset %d) is virtual "
12816 "but the vtable offset is not specified"),
12817 fieldname
, die
->offset
.sect_off
);
12818 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12819 TYPE_CPLUS_DYNAMIC (type
) = 1;
12824 /* Create the vector of member function fields, and attach it to the type. */
12827 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12828 struct dwarf2_cu
*cu
)
12830 struct fnfieldlist
*flp
;
12833 if (cu
->language
== language_ada
)
12834 error (_("unexpected member functions in Ada type"));
12836 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12837 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12838 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12840 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12842 struct nextfnfield
*nfp
= flp
->head
;
12843 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12846 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12847 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12848 fn_flp
->fn_fields
= (struct fn_field
*)
12849 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12850 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12851 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12854 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
12857 /* Returns non-zero if NAME is the name of a vtable member in CU's
12858 language, zero otherwise. */
12860 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
12862 static const char vptr
[] = "_vptr";
12863 static const char vtable
[] = "vtable";
12865 /* Look for the C++ and Java forms of the vtable. */
12866 if ((cu
->language
== language_java
12867 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
12868 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
12869 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
12875 /* GCC outputs unnamed structures that are really pointers to member
12876 functions, with the ABI-specified layout. If TYPE describes
12877 such a structure, smash it into a member function type.
12879 GCC shouldn't do this; it should just output pointer to member DIEs.
12880 This is GCC PR debug/28767. */
12883 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
12885 struct type
*pfn_type
, *domain_type
, *new_type
;
12887 /* Check for a structure with no name and two children. */
12888 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
12891 /* Check for __pfn and __delta members. */
12892 if (TYPE_FIELD_NAME (type
, 0) == NULL
12893 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
12894 || TYPE_FIELD_NAME (type
, 1) == NULL
12895 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
12898 /* Find the type of the method. */
12899 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
12900 if (pfn_type
== NULL
12901 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
12902 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
12905 /* Look for the "this" argument. */
12906 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
12907 if (TYPE_NFIELDS (pfn_type
) == 0
12908 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
12909 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
12912 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
12913 new_type
= alloc_type (objfile
);
12914 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
12915 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
12916 TYPE_VARARGS (pfn_type
));
12917 smash_to_methodptr_type (type
, new_type
);
12920 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
12924 producer_is_icc (struct dwarf2_cu
*cu
)
12926 if (!cu
->checked_producer
)
12927 check_producer (cu
);
12929 return cu
->producer_is_icc
;
12932 /* Called when we find the DIE that starts a structure or union scope
12933 (definition) to create a type for the structure or union. Fill in
12934 the type's name and general properties; the members will not be
12935 processed until process_structure_scope. A symbol table entry for
12936 the type will also not be done until process_structure_scope (assuming
12937 the type has a name).
12939 NOTE: we need to call these functions regardless of whether or not the
12940 DIE has a DW_AT_name attribute, since it might be an anonymous
12941 structure or union. This gets the type entered into our set of
12942 user defined types. */
12944 static struct type
*
12945 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12947 struct objfile
*objfile
= cu
->objfile
;
12949 struct attribute
*attr
;
12952 /* If the definition of this type lives in .debug_types, read that type.
12953 Don't follow DW_AT_specification though, that will take us back up
12954 the chain and we want to go down. */
12955 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
12958 type
= get_DW_AT_signature_type (die
, attr
, cu
);
12960 /* The type's CU may not be the same as CU.
12961 Ensure TYPE is recorded with CU in die_type_hash. */
12962 return set_die_type (die
, type
, cu
);
12965 type
= alloc_type (objfile
);
12966 INIT_CPLUS_SPECIFIC (type
);
12968 name
= dwarf2_name (die
, cu
);
12971 if (cu
->language
== language_cplus
12972 || cu
->language
== language_java
)
12974 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
12976 /* dwarf2_full_name might have already finished building the DIE's
12977 type. If so, there is no need to continue. */
12978 if (get_die_type (die
, cu
) != NULL
)
12979 return get_die_type (die
, cu
);
12981 TYPE_TAG_NAME (type
) = full_name
;
12982 if (die
->tag
== DW_TAG_structure_type
12983 || die
->tag
== DW_TAG_class_type
)
12984 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
12988 /* The name is already allocated along with this objfile, so
12989 we don't need to duplicate it for the type. */
12990 TYPE_TAG_NAME (type
) = name
;
12991 if (die
->tag
== DW_TAG_class_type
)
12992 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
12996 if (die
->tag
== DW_TAG_structure_type
)
12998 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13000 else if (die
->tag
== DW_TAG_union_type
)
13002 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13006 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13009 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13010 TYPE_DECLARED_CLASS (type
) = 1;
13012 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13015 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13019 TYPE_LENGTH (type
) = 0;
13022 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13024 /* ICC does not output the required DW_AT_declaration
13025 on incomplete types, but gives them a size of zero. */
13026 TYPE_STUB (type
) = 1;
13029 TYPE_STUB_SUPPORTED (type
) = 1;
13031 if (die_is_declaration (die
, cu
))
13032 TYPE_STUB (type
) = 1;
13033 else if (attr
== NULL
&& die
->child
== NULL
13034 && producer_is_realview (cu
->producer
))
13035 /* RealView does not output the required DW_AT_declaration
13036 on incomplete types. */
13037 TYPE_STUB (type
) = 1;
13039 /* We need to add the type field to the die immediately so we don't
13040 infinitely recurse when dealing with pointers to the structure
13041 type within the structure itself. */
13042 set_die_type (die
, type
, cu
);
13044 /* set_die_type should be already done. */
13045 set_descriptive_type (type
, die
, cu
);
13050 /* Finish creating a structure or union type, including filling in
13051 its members and creating a symbol for it. */
13054 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13056 struct objfile
*objfile
= cu
->objfile
;
13057 struct die_info
*child_die
;
13060 type
= get_die_type (die
, cu
);
13062 type
= read_structure_type (die
, cu
);
13064 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13066 struct field_info fi
;
13067 VEC (symbolp
) *template_args
= NULL
;
13068 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13070 memset (&fi
, 0, sizeof (struct field_info
));
13072 child_die
= die
->child
;
13074 while (child_die
&& child_die
->tag
)
13076 if (child_die
->tag
== DW_TAG_member
13077 || child_die
->tag
== DW_TAG_variable
)
13079 /* NOTE: carlton/2002-11-05: A C++ static data member
13080 should be a DW_TAG_member that is a declaration, but
13081 all versions of G++ as of this writing (so through at
13082 least 3.2.1) incorrectly generate DW_TAG_variable
13083 tags for them instead. */
13084 dwarf2_add_field (&fi
, child_die
, cu
);
13086 else if (child_die
->tag
== DW_TAG_subprogram
)
13088 /* C++ member function. */
13089 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13091 else if (child_die
->tag
== DW_TAG_inheritance
)
13093 /* C++ base class field. */
13094 dwarf2_add_field (&fi
, child_die
, cu
);
13096 else if (child_die
->tag
== DW_TAG_typedef
)
13097 dwarf2_add_typedef (&fi
, child_die
, cu
);
13098 else if (child_die
->tag
== DW_TAG_template_type_param
13099 || child_die
->tag
== DW_TAG_template_value_param
)
13101 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13104 VEC_safe_push (symbolp
, template_args
, arg
);
13107 child_die
= sibling_die (child_die
);
13110 /* Attach template arguments to type. */
13111 if (! VEC_empty (symbolp
, template_args
))
13113 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13114 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13115 = VEC_length (symbolp
, template_args
);
13116 TYPE_TEMPLATE_ARGUMENTS (type
)
13117 = obstack_alloc (&objfile
->objfile_obstack
,
13118 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13119 * sizeof (struct symbol
*)));
13120 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13121 VEC_address (symbolp
, template_args
),
13122 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13123 * sizeof (struct symbol
*)));
13124 VEC_free (symbolp
, template_args
);
13127 /* Attach fields and member functions to the type. */
13129 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13132 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13134 /* Get the type which refers to the base class (possibly this
13135 class itself) which contains the vtable pointer for the current
13136 class from the DW_AT_containing_type attribute. This use of
13137 DW_AT_containing_type is a GNU extension. */
13139 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13141 struct type
*t
= die_containing_type (die
, cu
);
13143 TYPE_VPTR_BASETYPE (type
) = t
;
13148 /* Our own class provides vtbl ptr. */
13149 for (i
= TYPE_NFIELDS (t
) - 1;
13150 i
>= TYPE_N_BASECLASSES (t
);
13153 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13155 if (is_vtable_name (fieldname
, cu
))
13157 TYPE_VPTR_FIELDNO (type
) = i
;
13162 /* Complain if virtual function table field not found. */
13163 if (i
< TYPE_N_BASECLASSES (t
))
13164 complaint (&symfile_complaints
,
13165 _("virtual function table pointer "
13166 "not found when defining class '%s'"),
13167 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13172 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
13175 else if (cu
->producer
13176 && strncmp (cu
->producer
,
13177 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
13179 /* The IBM XLC compiler does not provide direct indication
13180 of the containing type, but the vtable pointer is
13181 always named __vfp. */
13185 for (i
= TYPE_NFIELDS (type
) - 1;
13186 i
>= TYPE_N_BASECLASSES (type
);
13189 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13191 TYPE_VPTR_FIELDNO (type
) = i
;
13192 TYPE_VPTR_BASETYPE (type
) = type
;
13199 /* Copy fi.typedef_field_list linked list elements content into the
13200 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13201 if (fi
.typedef_field_list
)
13203 int i
= fi
.typedef_field_list_count
;
13205 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13206 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13207 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13208 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13210 /* Reverse the list order to keep the debug info elements order. */
13213 struct typedef_field
*dest
, *src
;
13215 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13216 src
= &fi
.typedef_field_list
->field
;
13217 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13222 do_cleanups (back_to
);
13224 if (HAVE_CPLUS_STRUCT (type
))
13225 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13228 quirk_gcc_member_function_pointer (type
, objfile
);
13230 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13231 snapshots) has been known to create a die giving a declaration
13232 for a class that has, as a child, a die giving a definition for a
13233 nested class. So we have to process our children even if the
13234 current die is a declaration. Normally, of course, a declaration
13235 won't have any children at all. */
13237 child_die
= die
->child
;
13239 while (child_die
!= NULL
&& child_die
->tag
)
13241 if (child_die
->tag
== DW_TAG_member
13242 || child_die
->tag
== DW_TAG_variable
13243 || child_die
->tag
== DW_TAG_inheritance
13244 || child_die
->tag
== DW_TAG_template_value_param
13245 || child_die
->tag
== DW_TAG_template_type_param
)
13250 process_die (child_die
, cu
);
13252 child_die
= sibling_die (child_die
);
13255 /* Do not consider external references. According to the DWARF standard,
13256 these DIEs are identified by the fact that they have no byte_size
13257 attribute, and a declaration attribute. */
13258 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13259 || !die_is_declaration (die
, cu
))
13260 new_symbol (die
, type
, cu
);
13263 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13264 update TYPE using some information only available in DIE's children. */
13267 update_enumeration_type_from_children (struct die_info
*die
,
13269 struct dwarf2_cu
*cu
)
13271 struct obstack obstack
;
13272 struct die_info
*child_die
;
13273 int unsigned_enum
= 1;
13276 struct cleanup
*old_chain
;
13278 obstack_init (&obstack
);
13279 old_chain
= make_cleanup_obstack_free (&obstack
);
13281 for (child_die
= die
->child
;
13282 child_die
!= NULL
&& child_die
->tag
;
13283 child_die
= sibling_die (child_die
))
13285 struct attribute
*attr
;
13287 const gdb_byte
*bytes
;
13288 struct dwarf2_locexpr_baton
*baton
;
13291 if (child_die
->tag
!= DW_TAG_enumerator
)
13294 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13298 name
= dwarf2_name (child_die
, cu
);
13300 name
= "<anonymous enumerator>";
13302 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13303 &value
, &bytes
, &baton
);
13309 else if ((mask
& value
) != 0)
13314 /* If we already know that the enum type is neither unsigned, nor
13315 a flag type, no need to look at the rest of the enumerates. */
13316 if (!unsigned_enum
&& !flag_enum
)
13321 TYPE_UNSIGNED (type
) = 1;
13323 TYPE_FLAG_ENUM (type
) = 1;
13325 do_cleanups (old_chain
);
13328 /* Given a DW_AT_enumeration_type die, set its type. We do not
13329 complete the type's fields yet, or create any symbols. */
13331 static struct type
*
13332 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13334 struct objfile
*objfile
= cu
->objfile
;
13336 struct attribute
*attr
;
13339 /* If the definition of this type lives in .debug_types, read that type.
13340 Don't follow DW_AT_specification though, that will take us back up
13341 the chain and we want to go down. */
13342 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13345 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13347 /* The type's CU may not be the same as CU.
13348 Ensure TYPE is recorded with CU in die_type_hash. */
13349 return set_die_type (die
, type
, cu
);
13352 type
= alloc_type (objfile
);
13354 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13355 name
= dwarf2_full_name (NULL
, die
, cu
);
13357 TYPE_TAG_NAME (type
) = name
;
13359 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13362 struct type
*underlying_type
= die_type (die
, cu
);
13364 TYPE_TARGET_TYPE (type
) = underlying_type
;
13367 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13370 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13374 TYPE_LENGTH (type
) = 0;
13377 /* The enumeration DIE can be incomplete. In Ada, any type can be
13378 declared as private in the package spec, and then defined only
13379 inside the package body. Such types are known as Taft Amendment
13380 Types. When another package uses such a type, an incomplete DIE
13381 may be generated by the compiler. */
13382 if (die_is_declaration (die
, cu
))
13383 TYPE_STUB (type
) = 1;
13385 /* Finish the creation of this type by using the enum's children.
13386 We must call this even when the underlying type has been provided
13387 so that we can determine if we're looking at a "flag" enum. */
13388 update_enumeration_type_from_children (die
, type
, cu
);
13390 /* If this type has an underlying type that is not a stub, then we
13391 may use its attributes. We always use the "unsigned" attribute
13392 in this situation, because ordinarily we guess whether the type
13393 is unsigned -- but the guess can be wrong and the underlying type
13394 can tell us the reality. However, we defer to a local size
13395 attribute if one exists, because this lets the compiler override
13396 the underlying type if needed. */
13397 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13399 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13400 if (TYPE_LENGTH (type
) == 0)
13401 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13404 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13406 return set_die_type (die
, type
, cu
);
13409 /* Given a pointer to a die which begins an enumeration, process all
13410 the dies that define the members of the enumeration, and create the
13411 symbol for the enumeration type.
13413 NOTE: We reverse the order of the element list. */
13416 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13418 struct type
*this_type
;
13420 this_type
= get_die_type (die
, cu
);
13421 if (this_type
== NULL
)
13422 this_type
= read_enumeration_type (die
, cu
);
13424 if (die
->child
!= NULL
)
13426 struct die_info
*child_die
;
13427 struct symbol
*sym
;
13428 struct field
*fields
= NULL
;
13429 int num_fields
= 0;
13432 child_die
= die
->child
;
13433 while (child_die
&& child_die
->tag
)
13435 if (child_die
->tag
!= DW_TAG_enumerator
)
13437 process_die (child_die
, cu
);
13441 name
= dwarf2_name (child_die
, cu
);
13444 sym
= new_symbol (child_die
, this_type
, cu
);
13446 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13448 fields
= (struct field
*)
13450 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13451 * sizeof (struct field
));
13454 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13455 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13456 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13457 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13463 child_die
= sibling_die (child_die
);
13468 TYPE_NFIELDS (this_type
) = num_fields
;
13469 TYPE_FIELDS (this_type
) = (struct field
*)
13470 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13471 memcpy (TYPE_FIELDS (this_type
), fields
,
13472 sizeof (struct field
) * num_fields
);
13477 /* If we are reading an enum from a .debug_types unit, and the enum
13478 is a declaration, and the enum is not the signatured type in the
13479 unit, then we do not want to add a symbol for it. Adding a
13480 symbol would in some cases obscure the true definition of the
13481 enum, giving users an incomplete type when the definition is
13482 actually available. Note that we do not want to do this for all
13483 enums which are just declarations, because C++0x allows forward
13484 enum declarations. */
13485 if (cu
->per_cu
->is_debug_types
13486 && die_is_declaration (die
, cu
))
13488 struct signatured_type
*sig_type
;
13490 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13491 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13492 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13496 new_symbol (die
, this_type
, cu
);
13499 /* Extract all information from a DW_TAG_array_type DIE and put it in
13500 the DIE's type field. For now, this only handles one dimensional
13503 static struct type
*
13504 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13506 struct objfile
*objfile
= cu
->objfile
;
13507 struct die_info
*child_die
;
13509 struct type
*element_type
, *range_type
, *index_type
;
13510 struct type
**range_types
= NULL
;
13511 struct attribute
*attr
;
13513 struct cleanup
*back_to
;
13515 unsigned int bit_stride
= 0;
13517 element_type
= die_type (die
, cu
);
13519 /* The die_type call above may have already set the type for this DIE. */
13520 type
= get_die_type (die
, cu
);
13524 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13526 bit_stride
= DW_UNSND (attr
) * 8;
13528 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13530 bit_stride
= DW_UNSND (attr
);
13532 /* Irix 6.2 native cc creates array types without children for
13533 arrays with unspecified length. */
13534 if (die
->child
== NULL
)
13536 index_type
= objfile_type (objfile
)->builtin_int
;
13537 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13538 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13540 return set_die_type (die
, type
, cu
);
13543 back_to
= make_cleanup (null_cleanup
, NULL
);
13544 child_die
= die
->child
;
13545 while (child_die
&& child_die
->tag
)
13547 if (child_die
->tag
== DW_TAG_subrange_type
)
13549 struct type
*child_type
= read_type_die (child_die
, cu
);
13551 if (child_type
!= NULL
)
13553 /* The range type was succesfully read. Save it for the
13554 array type creation. */
13555 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13557 range_types
= (struct type
**)
13558 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13559 * sizeof (struct type
*));
13561 make_cleanup (free_current_contents
, &range_types
);
13563 range_types
[ndim
++] = child_type
;
13566 child_die
= sibling_die (child_die
);
13569 /* Dwarf2 dimensions are output from left to right, create the
13570 necessary array types in backwards order. */
13572 type
= element_type
;
13574 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13579 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13585 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13589 /* Understand Dwarf2 support for vector types (like they occur on
13590 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13591 array type. This is not part of the Dwarf2/3 standard yet, but a
13592 custom vendor extension. The main difference between a regular
13593 array and the vector variant is that vectors are passed by value
13595 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13597 make_vector_type (type
);
13599 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13600 implementation may choose to implement triple vectors using this
13602 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13605 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13606 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13608 complaint (&symfile_complaints
,
13609 _("DW_AT_byte_size for array type smaller "
13610 "than the total size of elements"));
13613 name
= dwarf2_name (die
, cu
);
13615 TYPE_NAME (type
) = name
;
13617 /* Install the type in the die. */
13618 set_die_type (die
, type
, cu
);
13620 /* set_die_type should be already done. */
13621 set_descriptive_type (type
, die
, cu
);
13623 do_cleanups (back_to
);
13628 static enum dwarf_array_dim_ordering
13629 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13631 struct attribute
*attr
;
13633 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13635 if (attr
) return DW_SND (attr
);
13637 /* GNU F77 is a special case, as at 08/2004 array type info is the
13638 opposite order to the dwarf2 specification, but data is still
13639 laid out as per normal fortran.
13641 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13642 version checking. */
13644 if (cu
->language
== language_fortran
13645 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13647 return DW_ORD_row_major
;
13650 switch (cu
->language_defn
->la_array_ordering
)
13652 case array_column_major
:
13653 return DW_ORD_col_major
;
13654 case array_row_major
:
13656 return DW_ORD_row_major
;
13660 /* Extract all information from a DW_TAG_set_type DIE and put it in
13661 the DIE's type field. */
13663 static struct type
*
13664 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13666 struct type
*domain_type
, *set_type
;
13667 struct attribute
*attr
;
13669 domain_type
= die_type (die
, cu
);
13671 /* The die_type call above may have already set the type for this DIE. */
13672 set_type
= get_die_type (die
, cu
);
13676 set_type
= create_set_type (NULL
, domain_type
);
13678 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13680 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13682 return set_die_type (die
, set_type
, cu
);
13685 /* A helper for read_common_block that creates a locexpr baton.
13686 SYM is the symbol which we are marking as computed.
13687 COMMON_DIE is the DIE for the common block.
13688 COMMON_LOC is the location expression attribute for the common
13690 MEMBER_LOC is the location expression attribute for the particular
13691 member of the common block that we are processing.
13692 CU is the CU from which the above come. */
13695 mark_common_block_symbol_computed (struct symbol
*sym
,
13696 struct die_info
*common_die
,
13697 struct attribute
*common_loc
,
13698 struct attribute
*member_loc
,
13699 struct dwarf2_cu
*cu
)
13701 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13702 struct dwarf2_locexpr_baton
*baton
;
13704 unsigned int cu_off
;
13705 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13706 LONGEST offset
= 0;
13708 gdb_assert (common_loc
&& member_loc
);
13709 gdb_assert (attr_form_is_block (common_loc
));
13710 gdb_assert (attr_form_is_block (member_loc
)
13711 || attr_form_is_constant (member_loc
));
13713 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13714 sizeof (struct dwarf2_locexpr_baton
));
13715 baton
->per_cu
= cu
->per_cu
;
13716 gdb_assert (baton
->per_cu
);
13718 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13720 if (attr_form_is_constant (member_loc
))
13722 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13723 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13726 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13728 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13731 *ptr
++ = DW_OP_call4
;
13732 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13733 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13736 if (attr_form_is_constant (member_loc
))
13738 *ptr
++ = DW_OP_addr
;
13739 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13740 ptr
+= cu
->header
.addr_size
;
13744 /* We have to copy the data here, because DW_OP_call4 will only
13745 use a DW_AT_location attribute. */
13746 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13747 ptr
+= DW_BLOCK (member_loc
)->size
;
13750 *ptr
++ = DW_OP_plus
;
13751 gdb_assert (ptr
- baton
->data
== baton
->size
);
13753 SYMBOL_LOCATION_BATON (sym
) = baton
;
13754 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13757 /* Create appropriate locally-scoped variables for all the
13758 DW_TAG_common_block entries. Also create a struct common_block
13759 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13760 is used to sepate the common blocks name namespace from regular
13764 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13766 struct attribute
*attr
;
13768 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13771 /* Support the .debug_loc offsets. */
13772 if (attr_form_is_block (attr
))
13776 else if (attr_form_is_section_offset (attr
))
13778 dwarf2_complex_location_expr_complaint ();
13783 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13784 "common block member");
13789 if (die
->child
!= NULL
)
13791 struct objfile
*objfile
= cu
->objfile
;
13792 struct die_info
*child_die
;
13793 size_t n_entries
= 0, size
;
13794 struct common_block
*common_block
;
13795 struct symbol
*sym
;
13797 for (child_die
= die
->child
;
13798 child_die
&& child_die
->tag
;
13799 child_die
= sibling_die (child_die
))
13802 size
= (sizeof (struct common_block
)
13803 + (n_entries
- 1) * sizeof (struct symbol
*));
13804 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13805 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13806 common_block
->n_entries
= 0;
13808 for (child_die
= die
->child
;
13809 child_die
&& child_die
->tag
;
13810 child_die
= sibling_die (child_die
))
13812 /* Create the symbol in the DW_TAG_common_block block in the current
13814 sym
= new_symbol (child_die
, NULL
, cu
);
13817 struct attribute
*member_loc
;
13819 common_block
->contents
[common_block
->n_entries
++] = sym
;
13821 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13825 /* GDB has handled this for a long time, but it is
13826 not specified by DWARF. It seems to have been
13827 emitted by gfortran at least as recently as:
13828 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13829 complaint (&symfile_complaints
,
13830 _("Variable in common block has "
13831 "DW_AT_data_member_location "
13832 "- DIE at 0x%x [in module %s]"),
13833 child_die
->offset
.sect_off
,
13834 objfile_name (cu
->objfile
));
13836 if (attr_form_is_section_offset (member_loc
))
13837 dwarf2_complex_location_expr_complaint ();
13838 else if (attr_form_is_constant (member_loc
)
13839 || attr_form_is_block (member_loc
))
13842 mark_common_block_symbol_computed (sym
, die
, attr
,
13846 dwarf2_complex_location_expr_complaint ();
13851 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
13852 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
13856 /* Create a type for a C++ namespace. */
13858 static struct type
*
13859 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13861 struct objfile
*objfile
= cu
->objfile
;
13862 const char *previous_prefix
, *name
;
13866 /* For extensions, reuse the type of the original namespace. */
13867 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
13869 struct die_info
*ext_die
;
13870 struct dwarf2_cu
*ext_cu
= cu
;
13872 ext_die
= dwarf2_extension (die
, &ext_cu
);
13873 type
= read_type_die (ext_die
, ext_cu
);
13875 /* EXT_CU may not be the same as CU.
13876 Ensure TYPE is recorded with CU in die_type_hash. */
13877 return set_die_type (die
, type
, cu
);
13880 name
= namespace_name (die
, &is_anonymous
, cu
);
13882 /* Now build the name of the current namespace. */
13884 previous_prefix
= determine_prefix (die
, cu
);
13885 if (previous_prefix
[0] != '\0')
13886 name
= typename_concat (&objfile
->objfile_obstack
,
13887 previous_prefix
, name
, 0, cu
);
13889 /* Create the type. */
13890 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
13892 TYPE_NAME (type
) = name
;
13893 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
13895 return set_die_type (die
, type
, cu
);
13898 /* Read a C++ namespace. */
13901 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
13903 struct objfile
*objfile
= cu
->objfile
;
13906 /* Add a symbol associated to this if we haven't seen the namespace
13907 before. Also, add a using directive if it's an anonymous
13910 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
13914 type
= read_type_die (die
, cu
);
13915 new_symbol (die
, type
, cu
);
13917 namespace_name (die
, &is_anonymous
, cu
);
13920 const char *previous_prefix
= determine_prefix (die
, cu
);
13922 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
13923 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
13927 if (die
->child
!= NULL
)
13929 struct die_info
*child_die
= die
->child
;
13931 while (child_die
&& child_die
->tag
)
13933 process_die (child_die
, cu
);
13934 child_die
= sibling_die (child_die
);
13939 /* Read a Fortran module as type. This DIE can be only a declaration used for
13940 imported module. Still we need that type as local Fortran "use ... only"
13941 declaration imports depend on the created type in determine_prefix. */
13943 static struct type
*
13944 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13946 struct objfile
*objfile
= cu
->objfile
;
13947 const char *module_name
;
13950 module_name
= dwarf2_name (die
, cu
);
13952 complaint (&symfile_complaints
,
13953 _("DW_TAG_module has no name, offset 0x%x"),
13954 die
->offset
.sect_off
);
13955 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
13957 /* determine_prefix uses TYPE_TAG_NAME. */
13958 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
13960 return set_die_type (die
, type
, cu
);
13963 /* Read a Fortran module. */
13966 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
13968 struct die_info
*child_die
= die
->child
;
13971 type
= read_type_die (die
, cu
);
13972 new_symbol (die
, type
, cu
);
13974 while (child_die
&& child_die
->tag
)
13976 process_die (child_die
, cu
);
13977 child_die
= sibling_die (child_die
);
13981 /* Return the name of the namespace represented by DIE. Set
13982 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
13985 static const char *
13986 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
13988 struct die_info
*current_die
;
13989 const char *name
= NULL
;
13991 /* Loop through the extensions until we find a name. */
13993 for (current_die
= die
;
13994 current_die
!= NULL
;
13995 current_die
= dwarf2_extension (die
, &cu
))
13997 name
= dwarf2_name (current_die
, cu
);
14002 /* Is it an anonymous namespace? */
14004 *is_anonymous
= (name
== NULL
);
14006 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14011 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14012 the user defined type vector. */
14014 static struct type
*
14015 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14017 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14018 struct comp_unit_head
*cu_header
= &cu
->header
;
14020 struct attribute
*attr_byte_size
;
14021 struct attribute
*attr_address_class
;
14022 int byte_size
, addr_class
;
14023 struct type
*target_type
;
14025 target_type
= die_type (die
, cu
);
14027 /* The die_type call above may have already set the type for this DIE. */
14028 type
= get_die_type (die
, cu
);
14032 type
= lookup_pointer_type (target_type
);
14034 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14035 if (attr_byte_size
)
14036 byte_size
= DW_UNSND (attr_byte_size
);
14038 byte_size
= cu_header
->addr_size
;
14040 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14041 if (attr_address_class
)
14042 addr_class
= DW_UNSND (attr_address_class
);
14044 addr_class
= DW_ADDR_none
;
14046 /* If the pointer size or address class is different than the
14047 default, create a type variant marked as such and set the
14048 length accordingly. */
14049 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14051 if (gdbarch_address_class_type_flags_p (gdbarch
))
14055 type_flags
= gdbarch_address_class_type_flags
14056 (gdbarch
, byte_size
, addr_class
);
14057 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14059 type
= make_type_with_address_space (type
, type_flags
);
14061 else if (TYPE_LENGTH (type
) != byte_size
)
14063 complaint (&symfile_complaints
,
14064 _("invalid pointer size %d"), byte_size
);
14068 /* Should we also complain about unhandled address classes? */
14072 TYPE_LENGTH (type
) = byte_size
;
14073 return set_die_type (die
, type
, cu
);
14076 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14077 the user defined type vector. */
14079 static struct type
*
14080 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14083 struct type
*to_type
;
14084 struct type
*domain
;
14086 to_type
= die_type (die
, cu
);
14087 domain
= die_containing_type (die
, cu
);
14089 /* The calls above may have already set the type for this DIE. */
14090 type
= get_die_type (die
, cu
);
14094 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14095 type
= lookup_methodptr_type (to_type
);
14096 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14098 struct type
*new_type
= alloc_type (cu
->objfile
);
14100 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14101 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14102 TYPE_VARARGS (to_type
));
14103 type
= lookup_methodptr_type (new_type
);
14106 type
= lookup_memberptr_type (to_type
, domain
);
14108 return set_die_type (die
, type
, cu
);
14111 /* Extract all information from a DW_TAG_reference_type DIE and add to
14112 the user defined type vector. */
14114 static struct type
*
14115 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14117 struct comp_unit_head
*cu_header
= &cu
->header
;
14118 struct type
*type
, *target_type
;
14119 struct attribute
*attr
;
14121 target_type
= die_type (die
, cu
);
14123 /* The die_type call above may have already set the type for this DIE. */
14124 type
= get_die_type (die
, cu
);
14128 type
= lookup_reference_type (target_type
);
14129 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14132 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14136 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14138 return set_die_type (die
, type
, cu
);
14141 /* Add the given cv-qualifiers to the element type of the array. GCC
14142 outputs DWARF type qualifiers that apply to an array, not the
14143 element type. But GDB relies on the array element type to carry
14144 the cv-qualifiers. This mimics section 6.7.3 of the C99
14147 static struct type
*
14148 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14149 struct type
*base_type
, int cnst
, int voltl
)
14151 struct type
*el_type
, *inner_array
;
14153 base_type
= copy_type (base_type
);
14154 inner_array
= base_type
;
14156 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14158 TYPE_TARGET_TYPE (inner_array
) =
14159 copy_type (TYPE_TARGET_TYPE (inner_array
));
14160 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14163 el_type
= TYPE_TARGET_TYPE (inner_array
);
14164 cnst
|= TYPE_CONST (el_type
);
14165 voltl
|= TYPE_VOLATILE (el_type
);
14166 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14168 return set_die_type (die
, base_type
, cu
);
14171 static struct type
*
14172 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14174 struct type
*base_type
, *cv_type
;
14176 base_type
= die_type (die
, cu
);
14178 /* The die_type call above may have already set the type for this DIE. */
14179 cv_type
= get_die_type (die
, cu
);
14183 /* In case the const qualifier is applied to an array type, the element type
14184 is so qualified, not the array type (section 6.7.3 of C99). */
14185 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14186 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14188 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14189 return set_die_type (die
, cv_type
, cu
);
14192 static struct type
*
14193 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14195 struct type
*base_type
, *cv_type
;
14197 base_type
= die_type (die
, cu
);
14199 /* The die_type call above may have already set the type for this DIE. */
14200 cv_type
= get_die_type (die
, cu
);
14204 /* In case the volatile qualifier is applied to an array type, the
14205 element type is so qualified, not the array type (section 6.7.3
14207 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14208 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14210 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14211 return set_die_type (die
, cv_type
, cu
);
14214 /* Handle DW_TAG_restrict_type. */
14216 static struct type
*
14217 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14219 struct type
*base_type
, *cv_type
;
14221 base_type
= die_type (die
, cu
);
14223 /* The die_type call above may have already set the type for this DIE. */
14224 cv_type
= get_die_type (die
, cu
);
14228 cv_type
= make_restrict_type (base_type
);
14229 return set_die_type (die
, cv_type
, cu
);
14232 /* Extract all information from a DW_TAG_string_type DIE and add to
14233 the user defined type vector. It isn't really a user defined type,
14234 but it behaves like one, with other DIE's using an AT_user_def_type
14235 attribute to reference it. */
14237 static struct type
*
14238 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14240 struct objfile
*objfile
= cu
->objfile
;
14241 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14242 struct type
*type
, *range_type
, *index_type
, *char_type
;
14243 struct attribute
*attr
;
14244 unsigned int length
;
14246 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14249 length
= DW_UNSND (attr
);
14253 /* Check for the DW_AT_byte_size attribute. */
14254 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14257 length
= DW_UNSND (attr
);
14265 index_type
= objfile_type (objfile
)->builtin_int
;
14266 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14267 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14268 type
= create_string_type (NULL
, char_type
, range_type
);
14270 return set_die_type (die
, type
, cu
);
14273 /* Assuming that DIE corresponds to a function, returns nonzero
14274 if the function is prototyped. */
14277 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14279 struct attribute
*attr
;
14281 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14282 if (attr
&& (DW_UNSND (attr
) != 0))
14285 /* The DWARF standard implies that the DW_AT_prototyped attribute
14286 is only meaninful for C, but the concept also extends to other
14287 languages that allow unprototyped functions (Eg: Objective C).
14288 For all other languages, assume that functions are always
14290 if (cu
->language
!= language_c
14291 && cu
->language
!= language_objc
14292 && cu
->language
!= language_opencl
)
14295 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14296 prototyped and unprototyped functions; default to prototyped,
14297 since that is more common in modern code (and RealView warns
14298 about unprototyped functions). */
14299 if (producer_is_realview (cu
->producer
))
14305 /* Handle DIES due to C code like:
14309 int (*funcp)(int a, long l);
14313 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14315 static struct type
*
14316 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14318 struct objfile
*objfile
= cu
->objfile
;
14319 struct type
*type
; /* Type that this function returns. */
14320 struct type
*ftype
; /* Function that returns above type. */
14321 struct attribute
*attr
;
14323 type
= die_type (die
, cu
);
14325 /* The die_type call above may have already set the type for this DIE. */
14326 ftype
= get_die_type (die
, cu
);
14330 ftype
= lookup_function_type (type
);
14332 if (prototyped_function_p (die
, cu
))
14333 TYPE_PROTOTYPED (ftype
) = 1;
14335 /* Store the calling convention in the type if it's available in
14336 the subroutine die. Otherwise set the calling convention to
14337 the default value DW_CC_normal. */
14338 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14340 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14341 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14342 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14344 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14346 /* Record whether the function returns normally to its caller or not
14347 if the DWARF producer set that information. */
14348 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14349 if (attr
&& (DW_UNSND (attr
) != 0))
14350 TYPE_NO_RETURN (ftype
) = 1;
14352 /* We need to add the subroutine type to the die immediately so
14353 we don't infinitely recurse when dealing with parameters
14354 declared as the same subroutine type. */
14355 set_die_type (die
, ftype
, cu
);
14357 if (die
->child
!= NULL
)
14359 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14360 struct die_info
*child_die
;
14361 int nparams
, iparams
;
14363 /* Count the number of parameters.
14364 FIXME: GDB currently ignores vararg functions, but knows about
14365 vararg member functions. */
14367 child_die
= die
->child
;
14368 while (child_die
&& child_die
->tag
)
14370 if (child_die
->tag
== DW_TAG_formal_parameter
)
14372 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14373 TYPE_VARARGS (ftype
) = 1;
14374 child_die
= sibling_die (child_die
);
14377 /* Allocate storage for parameters and fill them in. */
14378 TYPE_NFIELDS (ftype
) = nparams
;
14379 TYPE_FIELDS (ftype
) = (struct field
*)
14380 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14382 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14383 even if we error out during the parameters reading below. */
14384 for (iparams
= 0; iparams
< nparams
; iparams
++)
14385 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14388 child_die
= die
->child
;
14389 while (child_die
&& child_die
->tag
)
14391 if (child_die
->tag
== DW_TAG_formal_parameter
)
14393 struct type
*arg_type
;
14395 /* DWARF version 2 has no clean way to discern C++
14396 static and non-static member functions. G++ helps
14397 GDB by marking the first parameter for non-static
14398 member functions (which is the this pointer) as
14399 artificial. We pass this information to
14400 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14402 DWARF version 3 added DW_AT_object_pointer, which GCC
14403 4.5 does not yet generate. */
14404 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14406 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14409 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14411 /* GCC/43521: In java, the formal parameter
14412 "this" is sometimes not marked with DW_AT_artificial. */
14413 if (cu
->language
== language_java
)
14415 const char *name
= dwarf2_name (child_die
, cu
);
14417 if (name
&& !strcmp (name
, "this"))
14418 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14421 arg_type
= die_type (child_die
, cu
);
14423 /* RealView does not mark THIS as const, which the testsuite
14424 expects. GCC marks THIS as const in method definitions,
14425 but not in the class specifications (GCC PR 43053). */
14426 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14427 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14430 struct dwarf2_cu
*arg_cu
= cu
;
14431 const char *name
= dwarf2_name (child_die
, cu
);
14433 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14436 /* If the compiler emits this, use it. */
14437 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14440 else if (name
&& strcmp (name
, "this") == 0)
14441 /* Function definitions will have the argument names. */
14443 else if (name
== NULL
&& iparams
== 0)
14444 /* Declarations may not have the names, so like
14445 elsewhere in GDB, assume an artificial first
14446 argument is "this". */
14450 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14454 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14457 child_die
= sibling_die (child_die
);
14464 static struct type
*
14465 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14467 struct objfile
*objfile
= cu
->objfile
;
14468 const char *name
= NULL
;
14469 struct type
*this_type
, *target_type
;
14471 name
= dwarf2_full_name (NULL
, die
, cu
);
14472 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14473 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14474 TYPE_NAME (this_type
) = name
;
14475 set_die_type (die
, this_type
, cu
);
14476 target_type
= die_type (die
, cu
);
14477 if (target_type
!= this_type
)
14478 TYPE_TARGET_TYPE (this_type
) = target_type
;
14481 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14482 spec and cause infinite loops in GDB. */
14483 complaint (&symfile_complaints
,
14484 _("Self-referential DW_TAG_typedef "
14485 "- DIE at 0x%x [in module %s]"),
14486 die
->offset
.sect_off
, objfile_name (objfile
));
14487 TYPE_TARGET_TYPE (this_type
) = NULL
;
14492 /* Find a representation of a given base type and install
14493 it in the TYPE field of the die. */
14495 static struct type
*
14496 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14498 struct objfile
*objfile
= cu
->objfile
;
14500 struct attribute
*attr
;
14501 int encoding
= 0, size
= 0;
14503 enum type_code code
= TYPE_CODE_INT
;
14504 int type_flags
= 0;
14505 struct type
*target_type
= NULL
;
14507 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14510 encoding
= DW_UNSND (attr
);
14512 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14515 size
= DW_UNSND (attr
);
14517 name
= dwarf2_name (die
, cu
);
14520 complaint (&symfile_complaints
,
14521 _("DW_AT_name missing from DW_TAG_base_type"));
14526 case DW_ATE_address
:
14527 /* Turn DW_ATE_address into a void * pointer. */
14528 code
= TYPE_CODE_PTR
;
14529 type_flags
|= TYPE_FLAG_UNSIGNED
;
14530 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14532 case DW_ATE_boolean
:
14533 code
= TYPE_CODE_BOOL
;
14534 type_flags
|= TYPE_FLAG_UNSIGNED
;
14536 case DW_ATE_complex_float
:
14537 code
= TYPE_CODE_COMPLEX
;
14538 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14540 case DW_ATE_decimal_float
:
14541 code
= TYPE_CODE_DECFLOAT
;
14544 code
= TYPE_CODE_FLT
;
14546 case DW_ATE_signed
:
14548 case DW_ATE_unsigned
:
14549 type_flags
|= TYPE_FLAG_UNSIGNED
;
14550 if (cu
->language
== language_fortran
14552 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
14553 code
= TYPE_CODE_CHAR
;
14555 case DW_ATE_signed_char
:
14556 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14557 || cu
->language
== language_pascal
14558 || cu
->language
== language_fortran
)
14559 code
= TYPE_CODE_CHAR
;
14561 case DW_ATE_unsigned_char
:
14562 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14563 || cu
->language
== language_pascal
14564 || cu
->language
== language_fortran
)
14565 code
= TYPE_CODE_CHAR
;
14566 type_flags
|= TYPE_FLAG_UNSIGNED
;
14569 /* We just treat this as an integer and then recognize the
14570 type by name elsewhere. */
14574 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14575 dwarf_type_encoding_name (encoding
));
14579 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14580 TYPE_NAME (type
) = name
;
14581 TYPE_TARGET_TYPE (type
) = target_type
;
14583 if (name
&& strcmp (name
, "char") == 0)
14584 TYPE_NOSIGN (type
) = 1;
14586 return set_die_type (die
, type
, cu
);
14589 /* Parse dwarf attribute if it's a block, reference or constant and put the
14590 resulting value of the attribute into struct bound_prop.
14591 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14594 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14595 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14597 struct dwarf2_property_baton
*baton
;
14598 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14600 if (attr
== NULL
|| prop
== NULL
)
14603 if (attr_form_is_block (attr
))
14605 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14606 baton
->referenced_type
= NULL
;
14607 baton
->locexpr
.per_cu
= cu
->per_cu
;
14608 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14609 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14610 prop
->data
.baton
= baton
;
14611 prop
->kind
= PROP_LOCEXPR
;
14612 gdb_assert (prop
->data
.baton
!= NULL
);
14614 else if (attr_form_is_ref (attr
))
14616 struct dwarf2_cu
*target_cu
= cu
;
14617 struct die_info
*target_die
;
14618 struct attribute
*target_attr
;
14620 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14621 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14622 if (target_attr
== NULL
)
14625 if (attr_form_is_section_offset (target_attr
))
14627 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14628 baton
->referenced_type
= die_type (target_die
, target_cu
);
14629 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14630 prop
->data
.baton
= baton
;
14631 prop
->kind
= PROP_LOCLIST
;
14632 gdb_assert (prop
->data
.baton
!= NULL
);
14634 else if (attr_form_is_block (target_attr
))
14636 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14637 baton
->referenced_type
= die_type (target_die
, target_cu
);
14638 baton
->locexpr
.per_cu
= cu
->per_cu
;
14639 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14640 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14641 prop
->data
.baton
= baton
;
14642 prop
->kind
= PROP_LOCEXPR
;
14643 gdb_assert (prop
->data
.baton
!= NULL
);
14647 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14648 "dynamic property");
14652 else if (attr_form_is_constant (attr
))
14654 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14655 prop
->kind
= PROP_CONST
;
14659 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14660 dwarf2_name (die
, cu
));
14667 /* Read the given DW_AT_subrange DIE. */
14669 static struct type
*
14670 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14672 struct type
*base_type
, *orig_base_type
;
14673 struct type
*range_type
;
14674 struct attribute
*attr
;
14675 struct dynamic_prop low
, high
;
14676 int low_default_is_valid
;
14677 int high_bound_is_count
= 0;
14679 LONGEST negative_mask
;
14681 orig_base_type
= die_type (die
, cu
);
14682 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14683 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14684 creating the range type, but we use the result of check_typedef
14685 when examining properties of the type. */
14686 base_type
= check_typedef (orig_base_type
);
14688 /* The die_type call above may have already set the type for this DIE. */
14689 range_type
= get_die_type (die
, cu
);
14693 low
.kind
= PROP_CONST
;
14694 high
.kind
= PROP_CONST
;
14695 high
.data
.const_val
= 0;
14697 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14698 omitting DW_AT_lower_bound. */
14699 switch (cu
->language
)
14702 case language_cplus
:
14703 low
.data
.const_val
= 0;
14704 low_default_is_valid
= 1;
14706 case language_fortran
:
14707 low
.data
.const_val
= 1;
14708 low_default_is_valid
= 1;
14711 case language_java
:
14712 case language_objc
:
14713 low
.data
.const_val
= 0;
14714 low_default_is_valid
= (cu
->header
.version
>= 4);
14718 case language_pascal
:
14719 low
.data
.const_val
= 1;
14720 low_default_is_valid
= (cu
->header
.version
>= 4);
14723 low
.data
.const_val
= 0;
14724 low_default_is_valid
= 0;
14728 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14730 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14731 else if (!low_default_is_valid
)
14732 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14733 "- DIE at 0x%x [in module %s]"),
14734 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14736 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14737 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14739 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14740 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14742 /* If bounds are constant do the final calculation here. */
14743 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14744 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14746 high_bound_is_count
= 1;
14750 /* Dwarf-2 specifications explicitly allows to create subrange types
14751 without specifying a base type.
14752 In that case, the base type must be set to the type of
14753 the lower bound, upper bound or count, in that order, if any of these
14754 three attributes references an object that has a type.
14755 If no base type is found, the Dwarf-2 specifications say that
14756 a signed integer type of size equal to the size of an address should
14758 For the following C code: `extern char gdb_int [];'
14759 GCC produces an empty range DIE.
14760 FIXME: muller/2010-05-28: Possible references to object for low bound,
14761 high bound or count are not yet handled by this code. */
14762 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14764 struct objfile
*objfile
= cu
->objfile
;
14765 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14766 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14767 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14769 /* Test "int", "long int", and "long long int" objfile types,
14770 and select the first one having a size above or equal to the
14771 architecture address size. */
14772 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14773 base_type
= int_type
;
14776 int_type
= objfile_type (objfile
)->builtin_long
;
14777 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14778 base_type
= int_type
;
14781 int_type
= objfile_type (objfile
)->builtin_long_long
;
14782 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14783 base_type
= int_type
;
14788 /* Normally, the DWARF producers are expected to use a signed
14789 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14790 But this is unfortunately not always the case, as witnessed
14791 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14792 is used instead. To work around that ambiguity, we treat
14793 the bounds as signed, and thus sign-extend their values, when
14794 the base type is signed. */
14796 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
14797 if (low
.kind
== PROP_CONST
14798 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
14799 low
.data
.const_val
|= negative_mask
;
14800 if (high
.kind
== PROP_CONST
14801 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
14802 high
.data
.const_val
|= negative_mask
;
14804 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
14806 if (high_bound_is_count
)
14807 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
14809 /* Ada expects an empty array on no boundary attributes. */
14810 if (attr
== NULL
&& cu
->language
!= language_ada
)
14811 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
14813 name
= dwarf2_name (die
, cu
);
14815 TYPE_NAME (range_type
) = name
;
14817 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14819 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
14821 set_die_type (die
, range_type
, cu
);
14823 /* set_die_type should be already done. */
14824 set_descriptive_type (range_type
, die
, cu
);
14829 static struct type
*
14830 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14834 /* For now, we only support the C meaning of an unspecified type: void. */
14836 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
14837 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
14839 return set_die_type (die
, type
, cu
);
14842 /* Read a single die and all its descendents. Set the die's sibling
14843 field to NULL; set other fields in the die correctly, and set all
14844 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
14845 location of the info_ptr after reading all of those dies. PARENT
14846 is the parent of the die in question. */
14848 static struct die_info
*
14849 read_die_and_children (const struct die_reader_specs
*reader
,
14850 const gdb_byte
*info_ptr
,
14851 const gdb_byte
**new_info_ptr
,
14852 struct die_info
*parent
)
14854 struct die_info
*die
;
14855 const gdb_byte
*cur_ptr
;
14858 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
14861 *new_info_ptr
= cur_ptr
;
14864 store_in_ref_table (die
, reader
->cu
);
14867 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
14871 *new_info_ptr
= cur_ptr
;
14874 die
->sibling
= NULL
;
14875 die
->parent
= parent
;
14879 /* Read a die, all of its descendents, and all of its siblings; set
14880 all of the fields of all of the dies correctly. Arguments are as
14881 in read_die_and_children. */
14883 static struct die_info
*
14884 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
14885 const gdb_byte
*info_ptr
,
14886 const gdb_byte
**new_info_ptr
,
14887 struct die_info
*parent
)
14889 struct die_info
*first_die
, *last_sibling
;
14890 const gdb_byte
*cur_ptr
;
14892 cur_ptr
= info_ptr
;
14893 first_die
= last_sibling
= NULL
;
14897 struct die_info
*die
14898 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
14902 *new_info_ptr
= cur_ptr
;
14909 last_sibling
->sibling
= die
;
14911 last_sibling
= die
;
14915 /* Read a die, all of its descendents, and all of its siblings; set
14916 all of the fields of all of the dies correctly. Arguments are as
14917 in read_die_and_children.
14918 This the main entry point for reading a DIE and all its children. */
14920 static struct die_info
*
14921 read_die_and_siblings (const struct die_reader_specs
*reader
,
14922 const gdb_byte
*info_ptr
,
14923 const gdb_byte
**new_info_ptr
,
14924 struct die_info
*parent
)
14926 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
14927 new_info_ptr
, parent
);
14929 if (dwarf2_die_debug
)
14931 fprintf_unfiltered (gdb_stdlog
,
14932 "Read die from %s@0x%x of %s:\n",
14933 get_section_name (reader
->die_section
),
14934 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
14935 bfd_get_filename (reader
->abfd
));
14936 dump_die (die
, dwarf2_die_debug
);
14942 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
14944 The caller is responsible for filling in the extra attributes
14945 and updating (*DIEP)->num_attrs.
14946 Set DIEP to point to a newly allocated die with its information,
14947 except for its child, sibling, and parent fields.
14948 Set HAS_CHILDREN to tell whether the die has children or not. */
14950 static const gdb_byte
*
14951 read_full_die_1 (const struct die_reader_specs
*reader
,
14952 struct die_info
**diep
, const gdb_byte
*info_ptr
,
14953 int *has_children
, int num_extra_attrs
)
14955 unsigned int abbrev_number
, bytes_read
, i
;
14956 sect_offset offset
;
14957 struct abbrev_info
*abbrev
;
14958 struct die_info
*die
;
14959 struct dwarf2_cu
*cu
= reader
->cu
;
14960 bfd
*abfd
= reader
->abfd
;
14962 offset
.sect_off
= info_ptr
- reader
->buffer
;
14963 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
14964 info_ptr
+= bytes_read
;
14965 if (!abbrev_number
)
14972 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
14974 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
14976 bfd_get_filename (abfd
));
14978 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
14979 die
->offset
= offset
;
14980 die
->tag
= abbrev
->tag
;
14981 die
->abbrev
= abbrev_number
;
14983 /* Make the result usable.
14984 The caller needs to update num_attrs after adding the extra
14986 die
->num_attrs
= abbrev
->num_attrs
;
14988 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
14989 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
14993 *has_children
= abbrev
->has_children
;
14997 /* Read a die and all its attributes.
14998 Set DIEP to point to a newly allocated die with its information,
14999 except for its child, sibling, and parent fields.
15000 Set HAS_CHILDREN to tell whether the die has children or not. */
15002 static const gdb_byte
*
15003 read_full_die (const struct die_reader_specs
*reader
,
15004 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15007 const gdb_byte
*result
;
15009 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15011 if (dwarf2_die_debug
)
15013 fprintf_unfiltered (gdb_stdlog
,
15014 "Read die from %s@0x%x of %s:\n",
15015 get_section_name (reader
->die_section
),
15016 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15017 bfd_get_filename (reader
->abfd
));
15018 dump_die (*diep
, dwarf2_die_debug
);
15024 /* Abbreviation tables.
15026 In DWARF version 2, the description of the debugging information is
15027 stored in a separate .debug_abbrev section. Before we read any
15028 dies from a section we read in all abbreviations and install them
15029 in a hash table. */
15031 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15033 static struct abbrev_info
*
15034 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15036 struct abbrev_info
*abbrev
;
15038 abbrev
= (struct abbrev_info
*)
15039 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15040 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15044 /* Add an abbreviation to the table. */
15047 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15048 unsigned int abbrev_number
,
15049 struct abbrev_info
*abbrev
)
15051 unsigned int hash_number
;
15053 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15054 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15055 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15058 /* Look up an abbrev in the table.
15059 Returns NULL if the abbrev is not found. */
15061 static struct abbrev_info
*
15062 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15063 unsigned int abbrev_number
)
15065 unsigned int hash_number
;
15066 struct abbrev_info
*abbrev
;
15068 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15069 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15073 if (abbrev
->number
== abbrev_number
)
15075 abbrev
= abbrev
->next
;
15080 /* Read in an abbrev table. */
15082 static struct abbrev_table
*
15083 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15084 sect_offset offset
)
15086 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15087 bfd
*abfd
= get_section_bfd_owner (section
);
15088 struct abbrev_table
*abbrev_table
;
15089 const gdb_byte
*abbrev_ptr
;
15090 struct abbrev_info
*cur_abbrev
;
15091 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15092 unsigned int abbrev_form
;
15093 struct attr_abbrev
*cur_attrs
;
15094 unsigned int allocated_attrs
;
15096 abbrev_table
= XNEW (struct abbrev_table
);
15097 abbrev_table
->offset
= offset
;
15098 obstack_init (&abbrev_table
->abbrev_obstack
);
15099 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15101 * sizeof (struct abbrev_info
*)));
15102 memset (abbrev_table
->abbrevs
, 0,
15103 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15105 dwarf2_read_section (objfile
, section
);
15106 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15107 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15108 abbrev_ptr
+= bytes_read
;
15110 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15111 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15113 /* Loop until we reach an abbrev number of 0. */
15114 while (abbrev_number
)
15116 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15118 /* read in abbrev header */
15119 cur_abbrev
->number
= abbrev_number
;
15120 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15121 abbrev_ptr
+= bytes_read
;
15122 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15125 /* now read in declarations */
15126 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15127 abbrev_ptr
+= bytes_read
;
15128 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15129 abbrev_ptr
+= bytes_read
;
15130 while (abbrev_name
)
15132 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15134 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15136 = xrealloc (cur_attrs
, (allocated_attrs
15137 * sizeof (struct attr_abbrev
)));
15140 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
15141 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
15142 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15143 abbrev_ptr
+= bytes_read
;
15144 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15145 abbrev_ptr
+= bytes_read
;
15148 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15149 (cur_abbrev
->num_attrs
15150 * sizeof (struct attr_abbrev
)));
15151 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15152 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15154 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15156 /* Get next abbreviation.
15157 Under Irix6 the abbreviations for a compilation unit are not
15158 always properly terminated with an abbrev number of 0.
15159 Exit loop if we encounter an abbreviation which we have
15160 already read (which means we are about to read the abbreviations
15161 for the next compile unit) or if the end of the abbreviation
15162 table is reached. */
15163 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15165 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15166 abbrev_ptr
+= bytes_read
;
15167 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15172 return abbrev_table
;
15175 /* Free the resources held by ABBREV_TABLE. */
15178 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15180 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15181 xfree (abbrev_table
);
15184 /* Same as abbrev_table_free but as a cleanup.
15185 We pass in a pointer to the pointer to the table so that we can
15186 set the pointer to NULL when we're done. It also simplifies
15187 build_type_psymtabs_1. */
15190 abbrev_table_free_cleanup (void *table_ptr
)
15192 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15194 if (*abbrev_table_ptr
!= NULL
)
15195 abbrev_table_free (*abbrev_table_ptr
);
15196 *abbrev_table_ptr
= NULL
;
15199 /* Read the abbrev table for CU from ABBREV_SECTION. */
15202 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15203 struct dwarf2_section_info
*abbrev_section
)
15206 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15209 /* Release the memory used by the abbrev table for a compilation unit. */
15212 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15214 struct dwarf2_cu
*cu
= ptr_to_cu
;
15216 if (cu
->abbrev_table
!= NULL
)
15217 abbrev_table_free (cu
->abbrev_table
);
15218 /* Set this to NULL so that we SEGV if we try to read it later,
15219 and also because free_comp_unit verifies this is NULL. */
15220 cu
->abbrev_table
= NULL
;
15223 /* Returns nonzero if TAG represents a type that we might generate a partial
15227 is_type_tag_for_partial (int tag
)
15232 /* Some types that would be reasonable to generate partial symbols for,
15233 that we don't at present. */
15234 case DW_TAG_array_type
:
15235 case DW_TAG_file_type
:
15236 case DW_TAG_ptr_to_member_type
:
15237 case DW_TAG_set_type
:
15238 case DW_TAG_string_type
:
15239 case DW_TAG_subroutine_type
:
15241 case DW_TAG_base_type
:
15242 case DW_TAG_class_type
:
15243 case DW_TAG_interface_type
:
15244 case DW_TAG_enumeration_type
:
15245 case DW_TAG_structure_type
:
15246 case DW_TAG_subrange_type
:
15247 case DW_TAG_typedef
:
15248 case DW_TAG_union_type
:
15255 /* Load all DIEs that are interesting for partial symbols into memory. */
15257 static struct partial_die_info
*
15258 load_partial_dies (const struct die_reader_specs
*reader
,
15259 const gdb_byte
*info_ptr
, int building_psymtab
)
15261 struct dwarf2_cu
*cu
= reader
->cu
;
15262 struct objfile
*objfile
= cu
->objfile
;
15263 struct partial_die_info
*part_die
;
15264 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15265 struct abbrev_info
*abbrev
;
15266 unsigned int bytes_read
;
15267 unsigned int load_all
= 0;
15268 int nesting_level
= 1;
15273 gdb_assert (cu
->per_cu
!= NULL
);
15274 if (cu
->per_cu
->load_all_dies
)
15278 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15282 &cu
->comp_unit_obstack
,
15283 hashtab_obstack_allocate
,
15284 dummy_obstack_deallocate
);
15286 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15287 sizeof (struct partial_die_info
));
15291 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15293 /* A NULL abbrev means the end of a series of children. */
15294 if (abbrev
== NULL
)
15296 if (--nesting_level
== 0)
15298 /* PART_DIE was probably the last thing allocated on the
15299 comp_unit_obstack, so we could call obstack_free
15300 here. We don't do that because the waste is small,
15301 and will be cleaned up when we're done with this
15302 compilation unit. This way, we're also more robust
15303 against other users of the comp_unit_obstack. */
15306 info_ptr
+= bytes_read
;
15307 last_die
= parent_die
;
15308 parent_die
= parent_die
->die_parent
;
15312 /* Check for template arguments. We never save these; if
15313 they're seen, we just mark the parent, and go on our way. */
15314 if (parent_die
!= NULL
15315 && cu
->language
== language_cplus
15316 && (abbrev
->tag
== DW_TAG_template_type_param
15317 || abbrev
->tag
== DW_TAG_template_value_param
))
15319 parent_die
->has_template_arguments
= 1;
15323 /* We don't need a partial DIE for the template argument. */
15324 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15329 /* We only recurse into c++ subprograms looking for template arguments.
15330 Skip their other children. */
15332 && cu
->language
== language_cplus
15333 && parent_die
!= NULL
15334 && parent_die
->tag
== DW_TAG_subprogram
)
15336 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15340 /* Check whether this DIE is interesting enough to save. Normally
15341 we would not be interested in members here, but there may be
15342 later variables referencing them via DW_AT_specification (for
15343 static members). */
15345 && !is_type_tag_for_partial (abbrev
->tag
)
15346 && abbrev
->tag
!= DW_TAG_constant
15347 && abbrev
->tag
!= DW_TAG_enumerator
15348 && abbrev
->tag
!= DW_TAG_subprogram
15349 && abbrev
->tag
!= DW_TAG_lexical_block
15350 && abbrev
->tag
!= DW_TAG_variable
15351 && abbrev
->tag
!= DW_TAG_namespace
15352 && abbrev
->tag
!= DW_TAG_module
15353 && abbrev
->tag
!= DW_TAG_member
15354 && abbrev
->tag
!= DW_TAG_imported_unit
15355 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15357 /* Otherwise we skip to the next sibling, if any. */
15358 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15362 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15365 /* This two-pass algorithm for processing partial symbols has a
15366 high cost in cache pressure. Thus, handle some simple cases
15367 here which cover the majority of C partial symbols. DIEs
15368 which neither have specification tags in them, nor could have
15369 specification tags elsewhere pointing at them, can simply be
15370 processed and discarded.
15372 This segment is also optional; scan_partial_symbols and
15373 add_partial_symbol will handle these DIEs if we chain
15374 them in normally. When compilers which do not emit large
15375 quantities of duplicate debug information are more common,
15376 this code can probably be removed. */
15378 /* Any complete simple types at the top level (pretty much all
15379 of them, for a language without namespaces), can be processed
15381 if (parent_die
== NULL
15382 && part_die
->has_specification
== 0
15383 && part_die
->is_declaration
== 0
15384 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15385 || part_die
->tag
== DW_TAG_base_type
15386 || part_die
->tag
== DW_TAG_subrange_type
))
15388 if (building_psymtab
&& part_die
->name
!= NULL
)
15389 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15390 VAR_DOMAIN
, LOC_TYPEDEF
,
15391 &objfile
->static_psymbols
,
15392 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15393 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15397 /* The exception for DW_TAG_typedef with has_children above is
15398 a workaround of GCC PR debug/47510. In the case of this complaint
15399 type_name_no_tag_or_error will error on such types later.
15401 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15402 it could not find the child DIEs referenced later, this is checked
15403 above. In correct DWARF DW_TAG_typedef should have no children. */
15405 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15406 complaint (&symfile_complaints
,
15407 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15408 "- DIE at 0x%x [in module %s]"),
15409 part_die
->offset
.sect_off
, objfile_name (objfile
));
15411 /* If we're at the second level, and we're an enumerator, and
15412 our parent has no specification (meaning possibly lives in a
15413 namespace elsewhere), then we can add the partial symbol now
15414 instead of queueing it. */
15415 if (part_die
->tag
== DW_TAG_enumerator
15416 && parent_die
!= NULL
15417 && parent_die
->die_parent
== NULL
15418 && parent_die
->tag
== DW_TAG_enumeration_type
15419 && parent_die
->has_specification
== 0)
15421 if (part_die
->name
== NULL
)
15422 complaint (&symfile_complaints
,
15423 _("malformed enumerator DIE ignored"));
15424 else if (building_psymtab
)
15425 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15426 VAR_DOMAIN
, LOC_CONST
,
15427 (cu
->language
== language_cplus
15428 || cu
->language
== language_java
)
15429 ? &objfile
->global_psymbols
15430 : &objfile
->static_psymbols
,
15431 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15433 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15437 /* We'll save this DIE so link it in. */
15438 part_die
->die_parent
= parent_die
;
15439 part_die
->die_sibling
= NULL
;
15440 part_die
->die_child
= NULL
;
15442 if (last_die
&& last_die
== parent_die
)
15443 last_die
->die_child
= part_die
;
15445 last_die
->die_sibling
= part_die
;
15447 last_die
= part_die
;
15449 if (first_die
== NULL
)
15450 first_die
= part_die
;
15452 /* Maybe add the DIE to the hash table. Not all DIEs that we
15453 find interesting need to be in the hash table, because we
15454 also have the parent/sibling/child chains; only those that we
15455 might refer to by offset later during partial symbol reading.
15457 For now this means things that might have be the target of a
15458 DW_AT_specification, DW_AT_abstract_origin, or
15459 DW_AT_extension. DW_AT_extension will refer only to
15460 namespaces; DW_AT_abstract_origin refers to functions (and
15461 many things under the function DIE, but we do not recurse
15462 into function DIEs during partial symbol reading) and
15463 possibly variables as well; DW_AT_specification refers to
15464 declarations. Declarations ought to have the DW_AT_declaration
15465 flag. It happens that GCC forgets to put it in sometimes, but
15466 only for functions, not for types.
15468 Adding more things than necessary to the hash table is harmless
15469 except for the performance cost. Adding too few will result in
15470 wasted time in find_partial_die, when we reread the compilation
15471 unit with load_all_dies set. */
15474 || abbrev
->tag
== DW_TAG_constant
15475 || abbrev
->tag
== DW_TAG_subprogram
15476 || abbrev
->tag
== DW_TAG_variable
15477 || abbrev
->tag
== DW_TAG_namespace
15478 || part_die
->is_declaration
)
15482 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15483 part_die
->offset
.sect_off
, INSERT
);
15487 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15488 sizeof (struct partial_die_info
));
15490 /* For some DIEs we want to follow their children (if any). For C
15491 we have no reason to follow the children of structures; for other
15492 languages we have to, so that we can get at method physnames
15493 to infer fully qualified class names, for DW_AT_specification,
15494 and for C++ template arguments. For C++, we also look one level
15495 inside functions to find template arguments (if the name of the
15496 function does not already contain the template arguments).
15498 For Ada, we need to scan the children of subprograms and lexical
15499 blocks as well because Ada allows the definition of nested
15500 entities that could be interesting for the debugger, such as
15501 nested subprograms for instance. */
15502 if (last_die
->has_children
15504 || last_die
->tag
== DW_TAG_namespace
15505 || last_die
->tag
== DW_TAG_module
15506 || last_die
->tag
== DW_TAG_enumeration_type
15507 || (cu
->language
== language_cplus
15508 && last_die
->tag
== DW_TAG_subprogram
15509 && (last_die
->name
== NULL
15510 || strchr (last_die
->name
, '<') == NULL
))
15511 || (cu
->language
!= language_c
15512 && (last_die
->tag
== DW_TAG_class_type
15513 || last_die
->tag
== DW_TAG_interface_type
15514 || last_die
->tag
== DW_TAG_structure_type
15515 || last_die
->tag
== DW_TAG_union_type
))
15516 || (cu
->language
== language_ada
15517 && (last_die
->tag
== DW_TAG_subprogram
15518 || last_die
->tag
== DW_TAG_lexical_block
))))
15521 parent_die
= last_die
;
15525 /* Otherwise we skip to the next sibling, if any. */
15526 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15528 /* Back to the top, do it again. */
15532 /* Read a minimal amount of information into the minimal die structure. */
15534 static const gdb_byte
*
15535 read_partial_die (const struct die_reader_specs
*reader
,
15536 struct partial_die_info
*part_die
,
15537 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15538 const gdb_byte
*info_ptr
)
15540 struct dwarf2_cu
*cu
= reader
->cu
;
15541 struct objfile
*objfile
= cu
->objfile
;
15542 const gdb_byte
*buffer
= reader
->buffer
;
15544 struct attribute attr
;
15545 int has_low_pc_attr
= 0;
15546 int has_high_pc_attr
= 0;
15547 int high_pc_relative
= 0;
15549 memset (part_die
, 0, sizeof (struct partial_die_info
));
15551 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15553 info_ptr
+= abbrev_len
;
15555 if (abbrev
== NULL
)
15558 part_die
->tag
= abbrev
->tag
;
15559 part_die
->has_children
= abbrev
->has_children
;
15561 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15563 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15565 /* Store the data if it is of an attribute we want to keep in a
15566 partial symbol table. */
15570 switch (part_die
->tag
)
15572 case DW_TAG_compile_unit
:
15573 case DW_TAG_partial_unit
:
15574 case DW_TAG_type_unit
:
15575 /* Compilation units have a DW_AT_name that is a filename, not
15576 a source language identifier. */
15577 case DW_TAG_enumeration_type
:
15578 case DW_TAG_enumerator
:
15579 /* These tags always have simple identifiers already; no need
15580 to canonicalize them. */
15581 part_die
->name
= DW_STRING (&attr
);
15585 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15586 &objfile
->per_bfd
->storage_obstack
);
15590 case DW_AT_linkage_name
:
15591 case DW_AT_MIPS_linkage_name
:
15592 /* Note that both forms of linkage name might appear. We
15593 assume they will be the same, and we only store the last
15595 if (cu
->language
== language_ada
)
15596 part_die
->name
= DW_STRING (&attr
);
15597 part_die
->linkage_name
= DW_STRING (&attr
);
15600 has_low_pc_attr
= 1;
15601 part_die
->lowpc
= attr_value_as_address (&attr
);
15603 case DW_AT_high_pc
:
15604 has_high_pc_attr
= 1;
15605 part_die
->highpc
= attr_value_as_address (&attr
);
15606 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15607 high_pc_relative
= 1;
15609 case DW_AT_location
:
15610 /* Support the .debug_loc offsets. */
15611 if (attr_form_is_block (&attr
))
15613 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15615 else if (attr_form_is_section_offset (&attr
))
15617 dwarf2_complex_location_expr_complaint ();
15621 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15622 "partial symbol information");
15625 case DW_AT_external
:
15626 part_die
->is_external
= DW_UNSND (&attr
);
15628 case DW_AT_declaration
:
15629 part_die
->is_declaration
= DW_UNSND (&attr
);
15632 part_die
->has_type
= 1;
15634 case DW_AT_abstract_origin
:
15635 case DW_AT_specification
:
15636 case DW_AT_extension
:
15637 part_die
->has_specification
= 1;
15638 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15639 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15640 || cu
->per_cu
->is_dwz
);
15642 case DW_AT_sibling
:
15643 /* Ignore absolute siblings, they might point outside of
15644 the current compile unit. */
15645 if (attr
.form
== DW_FORM_ref_addr
)
15646 complaint (&symfile_complaints
,
15647 _("ignoring absolute DW_AT_sibling"));
15650 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15651 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15653 if (sibling_ptr
< info_ptr
)
15654 complaint (&symfile_complaints
,
15655 _("DW_AT_sibling points backwards"));
15656 else if (sibling_ptr
> reader
->buffer_end
)
15657 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15659 part_die
->sibling
= sibling_ptr
;
15662 case DW_AT_byte_size
:
15663 part_die
->has_byte_size
= 1;
15665 case DW_AT_calling_convention
:
15666 /* DWARF doesn't provide a way to identify a program's source-level
15667 entry point. DW_AT_calling_convention attributes are only meant
15668 to describe functions' calling conventions.
15670 However, because it's a necessary piece of information in
15671 Fortran, and because DW_CC_program is the only piece of debugging
15672 information whose definition refers to a 'main program' at all,
15673 several compilers have begun marking Fortran main programs with
15674 DW_CC_program --- even when those functions use the standard
15675 calling conventions.
15677 So until DWARF specifies a way to provide this information and
15678 compilers pick up the new representation, we'll support this
15680 if (DW_UNSND (&attr
) == DW_CC_program
15681 && cu
->language
== language_fortran
)
15682 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15685 if (DW_UNSND (&attr
) == DW_INL_inlined
15686 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15687 part_die
->may_be_inlined
= 1;
15691 if (part_die
->tag
== DW_TAG_imported_unit
)
15693 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15694 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15695 || cu
->per_cu
->is_dwz
);
15704 if (high_pc_relative
)
15705 part_die
->highpc
+= part_die
->lowpc
;
15707 if (has_low_pc_attr
&& has_high_pc_attr
)
15709 /* When using the GNU linker, .gnu.linkonce. sections are used to
15710 eliminate duplicate copies of functions and vtables and such.
15711 The linker will arbitrarily choose one and discard the others.
15712 The AT_*_pc values for such functions refer to local labels in
15713 these sections. If the section from that file was discarded, the
15714 labels are not in the output, so the relocs get a value of 0.
15715 If this is a discarded function, mark the pc bounds as invalid,
15716 so that GDB will ignore it. */
15717 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15719 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15721 complaint (&symfile_complaints
,
15722 _("DW_AT_low_pc %s is zero "
15723 "for DIE at 0x%x [in module %s]"),
15724 paddress (gdbarch
, part_die
->lowpc
),
15725 part_die
->offset
.sect_off
, objfile_name (objfile
));
15727 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15728 else if (part_die
->lowpc
>= part_die
->highpc
)
15730 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15732 complaint (&symfile_complaints
,
15733 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15734 "for DIE at 0x%x [in module %s]"),
15735 paddress (gdbarch
, part_die
->lowpc
),
15736 paddress (gdbarch
, part_die
->highpc
),
15737 part_die
->offset
.sect_off
, objfile_name (objfile
));
15740 part_die
->has_pc_info
= 1;
15746 /* Find a cached partial DIE at OFFSET in CU. */
15748 static struct partial_die_info
*
15749 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15751 struct partial_die_info
*lookup_die
= NULL
;
15752 struct partial_die_info part_die
;
15754 part_die
.offset
= offset
;
15755 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15761 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15762 except in the case of .debug_types DIEs which do not reference
15763 outside their CU (they do however referencing other types via
15764 DW_FORM_ref_sig8). */
15766 static struct partial_die_info
*
15767 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15769 struct objfile
*objfile
= cu
->objfile
;
15770 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15771 struct partial_die_info
*pd
= NULL
;
15773 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15774 && offset_in_cu_p (&cu
->header
, offset
))
15776 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15779 /* We missed recording what we needed.
15780 Load all dies and try again. */
15781 per_cu
= cu
->per_cu
;
15785 /* TUs don't reference other CUs/TUs (except via type signatures). */
15786 if (cu
->per_cu
->is_debug_types
)
15788 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15789 " external reference to offset 0x%lx [in module %s].\n"),
15790 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
15791 bfd_get_filename (objfile
->obfd
));
15793 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
15796 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
15797 load_partial_comp_unit (per_cu
);
15799 per_cu
->cu
->last_used
= 0;
15800 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15803 /* If we didn't find it, and not all dies have been loaded,
15804 load them all and try again. */
15806 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
15808 per_cu
->load_all_dies
= 1;
15810 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15811 THIS_CU->cu may already be in use. So we can't just free it and
15812 replace its DIEs with the ones we read in. Instead, we leave those
15813 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15814 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15816 load_partial_comp_unit (per_cu
);
15818 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15822 internal_error (__FILE__
, __LINE__
,
15823 _("could not find partial DIE 0x%x "
15824 "in cache [from module %s]\n"),
15825 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
15829 /* See if we can figure out if the class lives in a namespace. We do
15830 this by looking for a member function; its demangled name will
15831 contain namespace info, if there is any. */
15834 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
15835 struct dwarf2_cu
*cu
)
15837 /* NOTE: carlton/2003-10-07: Getting the info this way changes
15838 what template types look like, because the demangler
15839 frequently doesn't give the same name as the debug info. We
15840 could fix this by only using the demangled name to get the
15841 prefix (but see comment in read_structure_type). */
15843 struct partial_die_info
*real_pdi
;
15844 struct partial_die_info
*child_pdi
;
15846 /* If this DIE (this DIE's specification, if any) has a parent, then
15847 we should not do this. We'll prepend the parent's fully qualified
15848 name when we create the partial symbol. */
15850 real_pdi
= struct_pdi
;
15851 while (real_pdi
->has_specification
)
15852 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
15853 real_pdi
->spec_is_dwz
, cu
);
15855 if (real_pdi
->die_parent
!= NULL
)
15858 for (child_pdi
= struct_pdi
->die_child
;
15860 child_pdi
= child_pdi
->die_sibling
)
15862 if (child_pdi
->tag
== DW_TAG_subprogram
15863 && child_pdi
->linkage_name
!= NULL
)
15865 char *actual_class_name
15866 = language_class_name_from_physname (cu
->language_defn
,
15867 child_pdi
->linkage_name
);
15868 if (actual_class_name
!= NULL
)
15871 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
15873 strlen (actual_class_name
));
15874 xfree (actual_class_name
);
15881 /* Adjust PART_DIE before generating a symbol for it. This function
15882 may set the is_external flag or change the DIE's name. */
15885 fixup_partial_die (struct partial_die_info
*part_die
,
15886 struct dwarf2_cu
*cu
)
15888 /* Once we've fixed up a die, there's no point in doing so again.
15889 This also avoids a memory leak if we were to call
15890 guess_partial_die_structure_name multiple times. */
15891 if (part_die
->fixup_called
)
15894 /* If we found a reference attribute and the DIE has no name, try
15895 to find a name in the referred to DIE. */
15897 if (part_die
->name
== NULL
&& part_die
->has_specification
)
15899 struct partial_die_info
*spec_die
;
15901 spec_die
= find_partial_die (part_die
->spec_offset
,
15902 part_die
->spec_is_dwz
, cu
);
15904 fixup_partial_die (spec_die
, cu
);
15906 if (spec_die
->name
)
15908 part_die
->name
= spec_die
->name
;
15910 /* Copy DW_AT_external attribute if it is set. */
15911 if (spec_die
->is_external
)
15912 part_die
->is_external
= spec_die
->is_external
;
15916 /* Set default names for some unnamed DIEs. */
15918 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
15919 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
15921 /* If there is no parent die to provide a namespace, and there are
15922 children, see if we can determine the namespace from their linkage
15924 if (cu
->language
== language_cplus
15925 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
15926 && part_die
->die_parent
== NULL
15927 && part_die
->has_children
15928 && (part_die
->tag
== DW_TAG_class_type
15929 || part_die
->tag
== DW_TAG_structure_type
15930 || part_die
->tag
== DW_TAG_union_type
))
15931 guess_partial_die_structure_name (part_die
, cu
);
15933 /* GCC might emit a nameless struct or union that has a linkage
15934 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15935 if (part_die
->name
== NULL
15936 && (part_die
->tag
== DW_TAG_class_type
15937 || part_die
->tag
== DW_TAG_interface_type
15938 || part_die
->tag
== DW_TAG_structure_type
15939 || part_die
->tag
== DW_TAG_union_type
)
15940 && part_die
->linkage_name
!= NULL
)
15944 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
15949 /* Strip any leading namespaces/classes, keep only the base name.
15950 DW_AT_name for named DIEs does not contain the prefixes. */
15951 base
= strrchr (demangled
, ':');
15952 if (base
&& base
> demangled
&& base
[-1] == ':')
15958 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
15959 base
, strlen (base
));
15964 part_die
->fixup_called
= 1;
15967 /* Read an attribute value described by an attribute form. */
15969 static const gdb_byte
*
15970 read_attribute_value (const struct die_reader_specs
*reader
,
15971 struct attribute
*attr
, unsigned form
,
15972 const gdb_byte
*info_ptr
)
15974 struct dwarf2_cu
*cu
= reader
->cu
;
15975 struct objfile
*objfile
= cu
->objfile
;
15976 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15977 bfd
*abfd
= reader
->abfd
;
15978 struct comp_unit_head
*cu_header
= &cu
->header
;
15979 unsigned int bytes_read
;
15980 struct dwarf_block
*blk
;
15985 case DW_FORM_ref_addr
:
15986 if (cu
->header
.version
== 2)
15987 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
15989 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
15990 &cu
->header
, &bytes_read
);
15991 info_ptr
+= bytes_read
;
15993 case DW_FORM_GNU_ref_alt
:
15994 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
15995 info_ptr
+= bytes_read
;
15998 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
15999 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16000 info_ptr
+= bytes_read
;
16002 case DW_FORM_block2
:
16003 blk
= dwarf_alloc_block (cu
);
16004 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16006 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16007 info_ptr
+= blk
->size
;
16008 DW_BLOCK (attr
) = blk
;
16010 case DW_FORM_block4
:
16011 blk
= dwarf_alloc_block (cu
);
16012 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16014 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16015 info_ptr
+= blk
->size
;
16016 DW_BLOCK (attr
) = blk
;
16018 case DW_FORM_data2
:
16019 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16022 case DW_FORM_data4
:
16023 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16026 case DW_FORM_data8
:
16027 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16030 case DW_FORM_sec_offset
:
16031 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16032 info_ptr
+= bytes_read
;
16034 case DW_FORM_string
:
16035 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16036 DW_STRING_IS_CANONICAL (attr
) = 0;
16037 info_ptr
+= bytes_read
;
16040 if (!cu
->per_cu
->is_dwz
)
16042 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16044 DW_STRING_IS_CANONICAL (attr
) = 0;
16045 info_ptr
+= bytes_read
;
16049 case DW_FORM_GNU_strp_alt
:
16051 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16052 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16055 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16056 DW_STRING_IS_CANONICAL (attr
) = 0;
16057 info_ptr
+= bytes_read
;
16060 case DW_FORM_exprloc
:
16061 case DW_FORM_block
:
16062 blk
= dwarf_alloc_block (cu
);
16063 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16064 info_ptr
+= bytes_read
;
16065 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16066 info_ptr
+= blk
->size
;
16067 DW_BLOCK (attr
) = blk
;
16069 case DW_FORM_block1
:
16070 blk
= dwarf_alloc_block (cu
);
16071 blk
->size
= read_1_byte (abfd
, info_ptr
);
16073 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16074 info_ptr
+= blk
->size
;
16075 DW_BLOCK (attr
) = blk
;
16077 case DW_FORM_data1
:
16078 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16082 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16085 case DW_FORM_flag_present
:
16086 DW_UNSND (attr
) = 1;
16088 case DW_FORM_sdata
:
16089 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16090 info_ptr
+= bytes_read
;
16092 case DW_FORM_udata
:
16093 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16094 info_ptr
+= bytes_read
;
16097 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16098 + read_1_byte (abfd
, info_ptr
));
16102 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16103 + read_2_bytes (abfd
, info_ptr
));
16107 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16108 + read_4_bytes (abfd
, info_ptr
));
16112 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16113 + read_8_bytes (abfd
, info_ptr
));
16116 case DW_FORM_ref_sig8
:
16117 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16120 case DW_FORM_ref_udata
:
16121 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16122 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16123 info_ptr
+= bytes_read
;
16125 case DW_FORM_indirect
:
16126 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16127 info_ptr
+= bytes_read
;
16128 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16130 case DW_FORM_GNU_addr_index
:
16131 if (reader
->dwo_file
== NULL
)
16133 /* For now flag a hard error.
16134 Later we can turn this into a complaint. */
16135 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16136 dwarf_form_name (form
),
16137 bfd_get_filename (abfd
));
16139 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16140 info_ptr
+= bytes_read
;
16142 case DW_FORM_GNU_str_index
:
16143 if (reader
->dwo_file
== NULL
)
16145 /* For now flag a hard error.
16146 Later we can turn this into a complaint if warranted. */
16147 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16148 dwarf_form_name (form
),
16149 bfd_get_filename (abfd
));
16152 ULONGEST str_index
=
16153 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16155 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16156 DW_STRING_IS_CANONICAL (attr
) = 0;
16157 info_ptr
+= bytes_read
;
16161 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16162 dwarf_form_name (form
),
16163 bfd_get_filename (abfd
));
16167 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16168 attr
->form
= DW_FORM_GNU_ref_alt
;
16170 /* We have seen instances where the compiler tried to emit a byte
16171 size attribute of -1 which ended up being encoded as an unsigned
16172 0xffffffff. Although 0xffffffff is technically a valid size value,
16173 an object of this size seems pretty unlikely so we can relatively
16174 safely treat these cases as if the size attribute was invalid and
16175 treat them as zero by default. */
16176 if (attr
->name
== DW_AT_byte_size
16177 && form
== DW_FORM_data4
16178 && DW_UNSND (attr
) >= 0xffffffff)
16181 (&symfile_complaints
,
16182 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16183 hex_string (DW_UNSND (attr
)));
16184 DW_UNSND (attr
) = 0;
16190 /* Read an attribute described by an abbreviated attribute. */
16192 static const gdb_byte
*
16193 read_attribute (const struct die_reader_specs
*reader
,
16194 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16195 const gdb_byte
*info_ptr
)
16197 attr
->name
= abbrev
->name
;
16198 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16201 /* Read dwarf information from a buffer. */
16203 static unsigned int
16204 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16206 return bfd_get_8 (abfd
, buf
);
16210 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16212 return bfd_get_signed_8 (abfd
, buf
);
16215 static unsigned int
16216 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16218 return bfd_get_16 (abfd
, buf
);
16222 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16224 return bfd_get_signed_16 (abfd
, buf
);
16227 static unsigned int
16228 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16230 return bfd_get_32 (abfd
, buf
);
16234 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16236 return bfd_get_signed_32 (abfd
, buf
);
16240 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16242 return bfd_get_64 (abfd
, buf
);
16246 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16247 unsigned int *bytes_read
)
16249 struct comp_unit_head
*cu_header
= &cu
->header
;
16250 CORE_ADDR retval
= 0;
16252 if (cu_header
->signed_addr_p
)
16254 switch (cu_header
->addr_size
)
16257 retval
= bfd_get_signed_16 (abfd
, buf
);
16260 retval
= bfd_get_signed_32 (abfd
, buf
);
16263 retval
= bfd_get_signed_64 (abfd
, buf
);
16266 internal_error (__FILE__
, __LINE__
,
16267 _("read_address: bad switch, signed [in module %s]"),
16268 bfd_get_filename (abfd
));
16273 switch (cu_header
->addr_size
)
16276 retval
= bfd_get_16 (abfd
, buf
);
16279 retval
= bfd_get_32 (abfd
, buf
);
16282 retval
= bfd_get_64 (abfd
, buf
);
16285 internal_error (__FILE__
, __LINE__
,
16286 _("read_address: bad switch, "
16287 "unsigned [in module %s]"),
16288 bfd_get_filename (abfd
));
16292 *bytes_read
= cu_header
->addr_size
;
16296 /* Read the initial length from a section. The (draft) DWARF 3
16297 specification allows the initial length to take up either 4 bytes
16298 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16299 bytes describe the length and all offsets will be 8 bytes in length
16302 An older, non-standard 64-bit format is also handled by this
16303 function. The older format in question stores the initial length
16304 as an 8-byte quantity without an escape value. Lengths greater
16305 than 2^32 aren't very common which means that the initial 4 bytes
16306 is almost always zero. Since a length value of zero doesn't make
16307 sense for the 32-bit format, this initial zero can be considered to
16308 be an escape value which indicates the presence of the older 64-bit
16309 format. As written, the code can't detect (old format) lengths
16310 greater than 4GB. If it becomes necessary to handle lengths
16311 somewhat larger than 4GB, we could allow other small values (such
16312 as the non-sensical values of 1, 2, and 3) to also be used as
16313 escape values indicating the presence of the old format.
16315 The value returned via bytes_read should be used to increment the
16316 relevant pointer after calling read_initial_length().
16318 [ Note: read_initial_length() and read_offset() are based on the
16319 document entitled "DWARF Debugging Information Format", revision
16320 3, draft 8, dated November 19, 2001. This document was obtained
16323 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16325 This document is only a draft and is subject to change. (So beware.)
16327 Details regarding the older, non-standard 64-bit format were
16328 determined empirically by examining 64-bit ELF files produced by
16329 the SGI toolchain on an IRIX 6.5 machine.
16331 - Kevin, July 16, 2002
16335 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16337 LONGEST length
= bfd_get_32 (abfd
, buf
);
16339 if (length
== 0xffffffff)
16341 length
= bfd_get_64 (abfd
, buf
+ 4);
16344 else if (length
== 0)
16346 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16347 length
= bfd_get_64 (abfd
, buf
);
16358 /* Cover function for read_initial_length.
16359 Returns the length of the object at BUF, and stores the size of the
16360 initial length in *BYTES_READ and stores the size that offsets will be in
16362 If the initial length size is not equivalent to that specified in
16363 CU_HEADER then issue a complaint.
16364 This is useful when reading non-comp-unit headers. */
16367 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16368 const struct comp_unit_head
*cu_header
,
16369 unsigned int *bytes_read
,
16370 unsigned int *offset_size
)
16372 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16374 gdb_assert (cu_header
->initial_length_size
== 4
16375 || cu_header
->initial_length_size
== 8
16376 || cu_header
->initial_length_size
== 12);
16378 if (cu_header
->initial_length_size
!= *bytes_read
)
16379 complaint (&symfile_complaints
,
16380 _("intermixed 32-bit and 64-bit DWARF sections"));
16382 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16386 /* Read an offset from the data stream. The size of the offset is
16387 given by cu_header->offset_size. */
16390 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16391 const struct comp_unit_head
*cu_header
,
16392 unsigned int *bytes_read
)
16394 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16396 *bytes_read
= cu_header
->offset_size
;
16400 /* Read an offset from the data stream. */
16403 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16405 LONGEST retval
= 0;
16407 switch (offset_size
)
16410 retval
= bfd_get_32 (abfd
, buf
);
16413 retval
= bfd_get_64 (abfd
, buf
);
16416 internal_error (__FILE__
, __LINE__
,
16417 _("read_offset_1: bad switch [in module %s]"),
16418 bfd_get_filename (abfd
));
16424 static const gdb_byte
*
16425 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16427 /* If the size of a host char is 8 bits, we can return a pointer
16428 to the buffer, otherwise we have to copy the data to a buffer
16429 allocated on the temporary obstack. */
16430 gdb_assert (HOST_CHAR_BIT
== 8);
16434 static const char *
16435 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16436 unsigned int *bytes_read_ptr
)
16438 /* If the size of a host char is 8 bits, we can return a pointer
16439 to the string, otherwise we have to copy the string to a buffer
16440 allocated on the temporary obstack. */
16441 gdb_assert (HOST_CHAR_BIT
== 8);
16444 *bytes_read_ptr
= 1;
16447 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16448 return (const char *) buf
;
16451 static const char *
16452 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16454 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16455 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16456 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16457 bfd_get_filename (abfd
));
16458 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16459 error (_("DW_FORM_strp pointing outside of "
16460 ".debug_str section [in module %s]"),
16461 bfd_get_filename (abfd
));
16462 gdb_assert (HOST_CHAR_BIT
== 8);
16463 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16465 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16468 /* Read a string at offset STR_OFFSET in the .debug_str section from
16469 the .dwz file DWZ. Throw an error if the offset is too large. If
16470 the string consists of a single NUL byte, return NULL; otherwise
16471 return a pointer to the string. */
16473 static const char *
16474 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16476 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16478 if (dwz
->str
.buffer
== NULL
)
16479 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16480 "section [in module %s]"),
16481 bfd_get_filename (dwz
->dwz_bfd
));
16482 if (str_offset
>= dwz
->str
.size
)
16483 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16484 ".debug_str section [in module %s]"),
16485 bfd_get_filename (dwz
->dwz_bfd
));
16486 gdb_assert (HOST_CHAR_BIT
== 8);
16487 if (dwz
->str
.buffer
[str_offset
] == '\0')
16489 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16492 static const char *
16493 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16494 const struct comp_unit_head
*cu_header
,
16495 unsigned int *bytes_read_ptr
)
16497 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16499 return read_indirect_string_at_offset (abfd
, str_offset
);
16503 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16504 unsigned int *bytes_read_ptr
)
16507 unsigned int num_read
;
16509 unsigned char byte
;
16517 byte
= bfd_get_8 (abfd
, buf
);
16520 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16521 if ((byte
& 128) == 0)
16527 *bytes_read_ptr
= num_read
;
16532 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16533 unsigned int *bytes_read_ptr
)
16536 int i
, shift
, num_read
;
16537 unsigned char byte
;
16545 byte
= bfd_get_8 (abfd
, buf
);
16548 result
|= ((LONGEST
) (byte
& 127) << shift
);
16550 if ((byte
& 128) == 0)
16555 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16556 result
|= -(((LONGEST
) 1) << shift
);
16557 *bytes_read_ptr
= num_read
;
16561 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16562 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16563 ADDR_SIZE is the size of addresses from the CU header. */
16566 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16568 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16569 bfd
*abfd
= objfile
->obfd
;
16570 const gdb_byte
*info_ptr
;
16572 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16573 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16574 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16575 objfile_name (objfile
));
16576 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16577 error (_("DW_FORM_addr_index pointing outside of "
16578 ".debug_addr section [in module %s]"),
16579 objfile_name (objfile
));
16580 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16581 + addr_base
+ addr_index
* addr_size
);
16582 if (addr_size
== 4)
16583 return bfd_get_32 (abfd
, info_ptr
);
16585 return bfd_get_64 (abfd
, info_ptr
);
16588 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16591 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16593 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16596 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16599 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16600 unsigned int *bytes_read
)
16602 bfd
*abfd
= cu
->objfile
->obfd
;
16603 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16605 return read_addr_index (cu
, addr_index
);
16608 /* Data structure to pass results from dwarf2_read_addr_index_reader
16609 back to dwarf2_read_addr_index. */
16611 struct dwarf2_read_addr_index_data
16613 ULONGEST addr_base
;
16617 /* die_reader_func for dwarf2_read_addr_index. */
16620 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16621 const gdb_byte
*info_ptr
,
16622 struct die_info
*comp_unit_die
,
16626 struct dwarf2_cu
*cu
= reader
->cu
;
16627 struct dwarf2_read_addr_index_data
*aidata
=
16628 (struct dwarf2_read_addr_index_data
*) data
;
16630 aidata
->addr_base
= cu
->addr_base
;
16631 aidata
->addr_size
= cu
->header
.addr_size
;
16634 /* Given an index in .debug_addr, fetch the value.
16635 NOTE: This can be called during dwarf expression evaluation,
16636 long after the debug information has been read, and thus per_cu->cu
16637 may no longer exist. */
16640 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16641 unsigned int addr_index
)
16643 struct objfile
*objfile
= per_cu
->objfile
;
16644 struct dwarf2_cu
*cu
= per_cu
->cu
;
16645 ULONGEST addr_base
;
16648 /* This is intended to be called from outside this file. */
16649 dw2_setup (objfile
);
16651 /* We need addr_base and addr_size.
16652 If we don't have PER_CU->cu, we have to get it.
16653 Nasty, but the alternative is storing the needed info in PER_CU,
16654 which at this point doesn't seem justified: it's not clear how frequently
16655 it would get used and it would increase the size of every PER_CU.
16656 Entry points like dwarf2_per_cu_addr_size do a similar thing
16657 so we're not in uncharted territory here.
16658 Alas we need to be a bit more complicated as addr_base is contained
16661 We don't need to read the entire CU(/TU).
16662 We just need the header and top level die.
16664 IWBN to use the aging mechanism to let us lazily later discard the CU.
16665 For now we skip this optimization. */
16669 addr_base
= cu
->addr_base
;
16670 addr_size
= cu
->header
.addr_size
;
16674 struct dwarf2_read_addr_index_data aidata
;
16676 /* Note: We can't use init_cutu_and_read_dies_simple here,
16677 we need addr_base. */
16678 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16679 dwarf2_read_addr_index_reader
, &aidata
);
16680 addr_base
= aidata
.addr_base
;
16681 addr_size
= aidata
.addr_size
;
16684 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16687 /* Given a DW_FORM_GNU_str_index, fetch the string.
16688 This is only used by the Fission support. */
16690 static const char *
16691 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16693 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16694 const char *objf_name
= objfile_name (objfile
);
16695 bfd
*abfd
= objfile
->obfd
;
16696 struct dwarf2_cu
*cu
= reader
->cu
;
16697 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16698 struct dwarf2_section_info
*str_offsets_section
=
16699 &reader
->dwo_file
->sections
.str_offsets
;
16700 const gdb_byte
*info_ptr
;
16701 ULONGEST str_offset
;
16702 static const char form_name
[] = "DW_FORM_GNU_str_index";
16704 dwarf2_read_section (objfile
, str_section
);
16705 dwarf2_read_section (objfile
, str_offsets_section
);
16706 if (str_section
->buffer
== NULL
)
16707 error (_("%s used without .debug_str.dwo section"
16708 " in CU at offset 0x%lx [in module %s]"),
16709 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16710 if (str_offsets_section
->buffer
== NULL
)
16711 error (_("%s used without .debug_str_offsets.dwo section"
16712 " in CU at offset 0x%lx [in module %s]"),
16713 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16714 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16715 error (_("%s pointing outside of .debug_str_offsets.dwo"
16716 " section in CU at offset 0x%lx [in module %s]"),
16717 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16718 info_ptr
= (str_offsets_section
->buffer
16719 + str_index
* cu
->header
.offset_size
);
16720 if (cu
->header
.offset_size
== 4)
16721 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16723 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16724 if (str_offset
>= str_section
->size
)
16725 error (_("Offset from %s pointing outside of"
16726 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16727 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16728 return (const char *) (str_section
->buffer
+ str_offset
);
16731 /* Return the length of an LEB128 number in BUF. */
16734 leb128_size (const gdb_byte
*buf
)
16736 const gdb_byte
*begin
= buf
;
16742 if ((byte
& 128) == 0)
16743 return buf
- begin
;
16748 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16757 cu
->language
= language_c
;
16759 case DW_LANG_C_plus_plus
:
16760 case DW_LANG_C_plus_plus_11
:
16761 case DW_LANG_C_plus_plus_14
:
16762 cu
->language
= language_cplus
;
16765 cu
->language
= language_d
;
16767 case DW_LANG_Fortran77
:
16768 case DW_LANG_Fortran90
:
16769 case DW_LANG_Fortran95
:
16770 cu
->language
= language_fortran
;
16773 cu
->language
= language_go
;
16775 case DW_LANG_Mips_Assembler
:
16776 cu
->language
= language_asm
;
16779 cu
->language
= language_java
;
16781 case DW_LANG_Ada83
:
16782 case DW_LANG_Ada95
:
16783 cu
->language
= language_ada
;
16785 case DW_LANG_Modula2
:
16786 cu
->language
= language_m2
;
16788 case DW_LANG_Pascal83
:
16789 cu
->language
= language_pascal
;
16792 cu
->language
= language_objc
;
16794 case DW_LANG_Cobol74
:
16795 case DW_LANG_Cobol85
:
16797 cu
->language
= language_minimal
;
16800 cu
->language_defn
= language_def (cu
->language
);
16803 /* Return the named attribute or NULL if not there. */
16805 static struct attribute
*
16806 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
16811 struct attribute
*spec
= NULL
;
16813 for (i
= 0; i
< die
->num_attrs
; ++i
)
16815 if (die
->attrs
[i
].name
== name
)
16816 return &die
->attrs
[i
];
16817 if (die
->attrs
[i
].name
== DW_AT_specification
16818 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
16819 spec
= &die
->attrs
[i
];
16825 die
= follow_die_ref (die
, spec
, &cu
);
16831 /* Return the named attribute or NULL if not there,
16832 but do not follow DW_AT_specification, etc.
16833 This is for use in contexts where we're reading .debug_types dies.
16834 Following DW_AT_specification, DW_AT_abstract_origin will take us
16835 back up the chain, and we want to go down. */
16837 static struct attribute
*
16838 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
16842 for (i
= 0; i
< die
->num_attrs
; ++i
)
16843 if (die
->attrs
[i
].name
== name
)
16844 return &die
->attrs
[i
];
16849 /* Return non-zero iff the attribute NAME is defined for the given DIE,
16850 and holds a non-zero value. This function should only be used for
16851 DW_FORM_flag or DW_FORM_flag_present attributes. */
16854 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
16856 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
16858 return (attr
&& DW_UNSND (attr
));
16862 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
16864 /* A DIE is a declaration if it has a DW_AT_declaration attribute
16865 which value is non-zero. However, we have to be careful with
16866 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
16867 (via dwarf2_flag_true_p) follows this attribute. So we may
16868 end up accidently finding a declaration attribute that belongs
16869 to a different DIE referenced by the specification attribute,
16870 even though the given DIE does not have a declaration attribute. */
16871 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
16872 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
16875 /* Return the die giving the specification for DIE, if there is
16876 one. *SPEC_CU is the CU containing DIE on input, and the CU
16877 containing the return value on output. If there is no
16878 specification, but there is an abstract origin, that is
16881 static struct die_info
*
16882 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
16884 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
16887 if (spec_attr
== NULL
)
16888 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
16890 if (spec_attr
== NULL
)
16893 return follow_die_ref (die
, spec_attr
, spec_cu
);
16896 /* Free the line_header structure *LH, and any arrays and strings it
16898 NOTE: This is also used as a "cleanup" function. */
16901 free_line_header (struct line_header
*lh
)
16903 if (lh
->standard_opcode_lengths
)
16904 xfree (lh
->standard_opcode_lengths
);
16906 /* Remember that all the lh->file_names[i].name pointers are
16907 pointers into debug_line_buffer, and don't need to be freed. */
16908 if (lh
->file_names
)
16909 xfree (lh
->file_names
);
16911 /* Similarly for the include directory names. */
16912 if (lh
->include_dirs
)
16913 xfree (lh
->include_dirs
);
16918 /* Add an entry to LH's include directory table. */
16921 add_include_dir (struct line_header
*lh
, const char *include_dir
)
16923 /* Grow the array if necessary. */
16924 if (lh
->include_dirs_size
== 0)
16926 lh
->include_dirs_size
= 1; /* for testing */
16927 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
16928 * sizeof (*lh
->include_dirs
));
16930 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
16932 lh
->include_dirs_size
*= 2;
16933 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
16934 (lh
->include_dirs_size
16935 * sizeof (*lh
->include_dirs
)));
16938 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
16941 /* Add an entry to LH's file name table. */
16944 add_file_name (struct line_header
*lh
,
16946 unsigned int dir_index
,
16947 unsigned int mod_time
,
16948 unsigned int length
)
16950 struct file_entry
*fe
;
16952 /* Grow the array if necessary. */
16953 if (lh
->file_names_size
== 0)
16955 lh
->file_names_size
= 1; /* for testing */
16956 lh
->file_names
= xmalloc (lh
->file_names_size
16957 * sizeof (*lh
->file_names
));
16959 else if (lh
->num_file_names
>= lh
->file_names_size
)
16961 lh
->file_names_size
*= 2;
16962 lh
->file_names
= xrealloc (lh
->file_names
,
16963 (lh
->file_names_size
16964 * sizeof (*lh
->file_names
)));
16967 fe
= &lh
->file_names
[lh
->num_file_names
++];
16969 fe
->dir_index
= dir_index
;
16970 fe
->mod_time
= mod_time
;
16971 fe
->length
= length
;
16972 fe
->included_p
= 0;
16976 /* A convenience function to find the proper .debug_line section for a
16979 static struct dwarf2_section_info
*
16980 get_debug_line_section (struct dwarf2_cu
*cu
)
16982 struct dwarf2_section_info
*section
;
16984 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
16986 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
16987 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
16988 else if (cu
->per_cu
->is_dwz
)
16990 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16992 section
= &dwz
->line
;
16995 section
= &dwarf2_per_objfile
->line
;
17000 /* Read the statement program header starting at OFFSET in
17001 .debug_line, or .debug_line.dwo. Return a pointer
17002 to a struct line_header, allocated using xmalloc.
17004 NOTE: the strings in the include directory and file name tables of
17005 the returned object point into the dwarf line section buffer,
17006 and must not be freed. */
17008 static struct line_header
*
17009 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17011 struct cleanup
*back_to
;
17012 struct line_header
*lh
;
17013 const gdb_byte
*line_ptr
;
17014 unsigned int bytes_read
, offset_size
;
17016 const char *cur_dir
, *cur_file
;
17017 struct dwarf2_section_info
*section
;
17020 section
= get_debug_line_section (cu
);
17021 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17022 if (section
->buffer
== NULL
)
17024 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17025 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17027 complaint (&symfile_complaints
, _("missing .debug_line section"));
17031 /* We can't do this until we know the section is non-empty.
17032 Only then do we know we have such a section. */
17033 abfd
= get_section_bfd_owner (section
);
17035 /* Make sure that at least there's room for the total_length field.
17036 That could be 12 bytes long, but we're just going to fudge that. */
17037 if (offset
+ 4 >= section
->size
)
17039 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17043 lh
= xmalloc (sizeof (*lh
));
17044 memset (lh
, 0, sizeof (*lh
));
17045 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17048 line_ptr
= section
->buffer
+ offset
;
17050 /* Read in the header. */
17052 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17053 &bytes_read
, &offset_size
);
17054 line_ptr
+= bytes_read
;
17055 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17057 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17058 do_cleanups (back_to
);
17061 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17062 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17064 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17065 line_ptr
+= offset_size
;
17066 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17068 if (lh
->version
>= 4)
17070 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17074 lh
->maximum_ops_per_instruction
= 1;
17076 if (lh
->maximum_ops_per_instruction
== 0)
17078 lh
->maximum_ops_per_instruction
= 1;
17079 complaint (&symfile_complaints
,
17080 _("invalid maximum_ops_per_instruction "
17081 "in `.debug_line' section"));
17084 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17086 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17088 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17090 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17092 lh
->standard_opcode_lengths
17093 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17095 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17096 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17098 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17102 /* Read directory table. */
17103 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17105 line_ptr
+= bytes_read
;
17106 add_include_dir (lh
, cur_dir
);
17108 line_ptr
+= bytes_read
;
17110 /* Read file name table. */
17111 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17113 unsigned int dir_index
, mod_time
, length
;
17115 line_ptr
+= bytes_read
;
17116 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17117 line_ptr
+= bytes_read
;
17118 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17119 line_ptr
+= bytes_read
;
17120 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17121 line_ptr
+= bytes_read
;
17123 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17125 line_ptr
+= bytes_read
;
17126 lh
->statement_program_start
= line_ptr
;
17128 if (line_ptr
> (section
->buffer
+ section
->size
))
17129 complaint (&symfile_complaints
,
17130 _("line number info header doesn't "
17131 "fit in `.debug_line' section"));
17133 discard_cleanups (back_to
);
17137 /* Subroutine of dwarf_decode_lines to simplify it.
17138 Return the file name of the psymtab for included file FILE_INDEX
17139 in line header LH of PST.
17140 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17141 If space for the result is malloc'd, it will be freed by a cleanup.
17142 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17144 The function creates dangling cleanup registration. */
17146 static const char *
17147 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17148 const struct partial_symtab
*pst
,
17149 const char *comp_dir
)
17151 const struct file_entry fe
= lh
->file_names
[file_index
];
17152 const char *include_name
= fe
.name
;
17153 const char *include_name_to_compare
= include_name
;
17154 const char *dir_name
= NULL
;
17155 const char *pst_filename
;
17156 char *copied_name
= NULL
;
17160 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17162 if (!IS_ABSOLUTE_PATH (include_name
)
17163 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17165 /* Avoid creating a duplicate psymtab for PST.
17166 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17167 Before we do the comparison, however, we need to account
17168 for DIR_NAME and COMP_DIR.
17169 First prepend dir_name (if non-NULL). If we still don't
17170 have an absolute path prepend comp_dir (if non-NULL).
17171 However, the directory we record in the include-file's
17172 psymtab does not contain COMP_DIR (to match the
17173 corresponding symtab(s)).
17178 bash$ gcc -g ./hello.c
17179 include_name = "hello.c"
17181 DW_AT_comp_dir = comp_dir = "/tmp"
17182 DW_AT_name = "./hello.c"
17186 if (dir_name
!= NULL
)
17188 char *tem
= concat (dir_name
, SLASH_STRING
,
17189 include_name
, (char *)NULL
);
17191 make_cleanup (xfree
, tem
);
17192 include_name
= tem
;
17193 include_name_to_compare
= include_name
;
17195 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17197 char *tem
= concat (comp_dir
, SLASH_STRING
,
17198 include_name
, (char *)NULL
);
17200 make_cleanup (xfree
, tem
);
17201 include_name_to_compare
= tem
;
17205 pst_filename
= pst
->filename
;
17206 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17208 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17209 pst_filename
, (char *)NULL
);
17210 pst_filename
= copied_name
;
17213 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17215 if (copied_name
!= NULL
)
17216 xfree (copied_name
);
17220 return include_name
;
17223 /* Ignore this record_line request. */
17226 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17231 /* Return non-zero if we should add LINE to the line number table.
17232 LINE is the line to add, LAST_LINE is the last line that was added,
17233 LAST_SUBFILE is the subfile for LAST_LINE.
17234 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17235 had a non-zero discriminator.
17237 We have to be careful in the presence of discriminators.
17238 E.g., for this line:
17240 for (i = 0; i < 100000; i++);
17242 clang can emit four line number entries for that one line,
17243 each with a different discriminator.
17244 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17246 However, we want gdb to coalesce all four entries into one.
17247 Otherwise the user could stepi into the middle of the line and
17248 gdb would get confused about whether the pc really was in the
17249 middle of the line.
17251 Things are further complicated by the fact that two consecutive
17252 line number entries for the same line is a heuristic used by gcc
17253 to denote the end of the prologue. So we can't just discard duplicate
17254 entries, we have to be selective about it. The heuristic we use is
17255 that we only collapse consecutive entries for the same line if at least
17256 one of those entries has a non-zero discriminator. PR 17276.
17258 Note: Addresses in the line number state machine can never go backwards
17259 within one sequence, thus this coalescing is ok. */
17262 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17263 int line_has_non_zero_discriminator
,
17264 struct subfile
*last_subfile
)
17266 if (current_subfile
!= last_subfile
)
17268 if (line
!= last_line
)
17270 /* Same line for the same file that we've seen already.
17271 As a last check, for pr 17276, only record the line if the line
17272 has never had a non-zero discriminator. */
17273 if (!line_has_non_zero_discriminator
)
17278 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17279 in the line table of subfile SUBFILE. */
17282 dwarf_record_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17283 unsigned int line
, CORE_ADDR address
,
17284 record_line_ftype p_record_line
)
17286 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17288 (*p_record_line
) (subfile
, line
, addr
);
17291 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17292 Mark the end of a set of line number records.
17293 The arguments are the same as for dwarf_record_line.
17294 If SUBFILE is NULL the request is ignored. */
17297 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17298 CORE_ADDR address
, record_line_ftype p_record_line
)
17300 if (subfile
!= NULL
)
17301 dwarf_record_line (gdbarch
, subfile
, 0, address
, p_record_line
);
17304 /* Subroutine of dwarf_decode_lines to simplify it.
17305 Process the line number information in LH. */
17308 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17309 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17311 const gdb_byte
*line_ptr
, *extended_end
;
17312 const gdb_byte
*line_end
;
17313 unsigned int bytes_read
, extended_len
;
17314 unsigned char op_code
, extended_op
;
17315 CORE_ADDR baseaddr
;
17316 struct objfile
*objfile
= cu
->objfile
;
17317 bfd
*abfd
= objfile
->obfd
;
17318 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17319 struct subfile
*last_subfile
= NULL
;
17320 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17323 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17325 line_ptr
= lh
->statement_program_start
;
17326 line_end
= lh
->statement_program_end
;
17328 /* Read the statement sequences until there's nothing left. */
17329 while (line_ptr
< line_end
)
17331 /* State machine registers. Call `gdbarch_adjust_dwarf2_line'
17332 on the initial 0 address as if there was a line entry for it
17333 so that the backend has a chance to adjust it and also record
17334 it in case it needs it. This is currently used by MIPS code,
17335 cf. `mips_adjust_dwarf2_line'. */
17336 CORE_ADDR address
= gdbarch_adjust_dwarf2_line (gdbarch
, 0, 0);
17337 unsigned int file
= 1;
17338 unsigned int line
= 1;
17339 int is_stmt
= lh
->default_is_stmt
;
17340 int end_sequence
= 0;
17341 unsigned char op_index
= 0;
17342 unsigned int discriminator
= 0;
17343 /* The last line number that was recorded, used to coalesce
17344 consecutive entries for the same line. This can happen, for
17345 example, when discriminators are present. PR 17276. */
17346 unsigned int last_line
= 0;
17347 int line_has_non_zero_discriminator
= 0;
17349 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17351 /* Start a subfile for the current file of the state machine. */
17352 /* lh->include_dirs and lh->file_names are 0-based, but the
17353 directory and file name numbers in the statement program
17355 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17356 const char *dir
= NULL
;
17359 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17361 dwarf2_start_subfile (fe
->name
, dir
);
17364 /* Decode the table. */
17365 while (!end_sequence
)
17367 op_code
= read_1_byte (abfd
, line_ptr
);
17369 if (line_ptr
> line_end
)
17371 dwarf2_debug_line_missing_end_sequence_complaint ();
17375 if (op_code
>= lh
->opcode_base
)
17377 /* Special opcode. */
17378 unsigned char adj_opcode
;
17379 CORE_ADDR addr_adj
;
17382 adj_opcode
= op_code
- lh
->opcode_base
;
17383 addr_adj
= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17384 / lh
->maximum_ops_per_instruction
)
17385 * lh
->minimum_instruction_length
);
17386 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17387 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17388 % lh
->maximum_ops_per_instruction
);
17389 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17390 line
+= line_delta
;
17391 if (line_delta
!= 0)
17392 line_has_non_zero_discriminator
= discriminator
!= 0;
17393 if (lh
->num_file_names
< file
|| file
== 0)
17394 dwarf2_debug_line_missing_file_complaint ();
17395 /* For now we ignore lines not starting on an
17396 instruction boundary. */
17397 else if (op_index
== 0)
17399 lh
->file_names
[file
- 1].included_p
= 1;
17400 if (!decode_for_pst_p
&& is_stmt
)
17402 if (last_subfile
!= current_subfile
)
17404 dwarf_finish_line (gdbarch
, last_subfile
,
17405 address
, p_record_line
);
17407 if (dwarf_record_line_p (line
, last_line
,
17408 line_has_non_zero_discriminator
,
17411 dwarf_record_line (gdbarch
, current_subfile
,
17412 line
, address
, p_record_line
);
17414 last_subfile
= current_subfile
;
17420 else switch (op_code
)
17422 case DW_LNS_extended_op
:
17423 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17425 line_ptr
+= bytes_read
;
17426 extended_end
= line_ptr
+ extended_len
;
17427 extended_op
= read_1_byte (abfd
, line_ptr
);
17429 switch (extended_op
)
17431 case DW_LNE_end_sequence
:
17432 p_record_line
= record_line
;
17435 case DW_LNE_set_address
:
17436 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17438 /* If address < lowpc then it's not a usable value, it's
17439 outside the pc range of the CU. However, we restrict
17440 the test to only address values of zero to preserve
17441 GDB's previous behaviour which is to handle the specific
17442 case of a function being GC'd by the linker. */
17443 if (address
== 0 && address
< lowpc
)
17445 /* This line table is for a function which has been
17446 GCd by the linker. Ignore it. PR gdb/12528 */
17449 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17451 complaint (&symfile_complaints
,
17452 _(".debug_line address at offset 0x%lx is 0 "
17454 line_offset
, objfile_name (objfile
));
17455 p_record_line
= noop_record_line
;
17456 /* Note: p_record_line is left as noop_record_line
17457 until we see DW_LNE_end_sequence. */
17461 line_ptr
+= bytes_read
;
17462 address
+= baseaddr
;
17463 address
= gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17465 case DW_LNE_define_file
:
17467 const char *cur_file
;
17468 unsigned int dir_index
, mod_time
, length
;
17470 cur_file
= read_direct_string (abfd
, line_ptr
,
17472 line_ptr
+= bytes_read
;
17474 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17475 line_ptr
+= bytes_read
;
17477 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17478 line_ptr
+= bytes_read
;
17480 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17481 line_ptr
+= bytes_read
;
17482 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17485 case DW_LNE_set_discriminator
:
17486 /* The discriminator is not interesting to the debugger;
17487 just ignore it. We still need to check its value though:
17488 if there are consecutive entries for the same
17489 (non-prologue) line we want to coalesce them.
17491 discriminator
= read_unsigned_leb128 (abfd
, line_ptr
,
17493 line_has_non_zero_discriminator
|= discriminator
!= 0;
17494 line_ptr
+= bytes_read
;
17497 complaint (&symfile_complaints
,
17498 _("mangled .debug_line section"));
17501 /* Make sure that we parsed the extended op correctly. If e.g.
17502 we expected a different address size than the producer used,
17503 we may have read the wrong number of bytes. */
17504 if (line_ptr
!= extended_end
)
17506 complaint (&symfile_complaints
,
17507 _("mangled .debug_line section"));
17512 if (lh
->num_file_names
< file
|| file
== 0)
17513 dwarf2_debug_line_missing_file_complaint ();
17516 lh
->file_names
[file
- 1].included_p
= 1;
17517 if (!decode_for_pst_p
&& is_stmt
)
17519 if (last_subfile
!= current_subfile
)
17521 dwarf_finish_line (gdbarch
, last_subfile
,
17522 address
, p_record_line
);
17524 if (dwarf_record_line_p (line
, last_line
,
17525 line_has_non_zero_discriminator
,
17528 dwarf_record_line (gdbarch
, current_subfile
,
17529 line
, address
, p_record_line
);
17531 last_subfile
= current_subfile
;
17537 case DW_LNS_advance_pc
:
17540 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17541 CORE_ADDR addr_adj
;
17543 addr_adj
= (((op_index
+ adjust
)
17544 / lh
->maximum_ops_per_instruction
)
17545 * lh
->minimum_instruction_length
);
17546 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17547 op_index
= ((op_index
+ adjust
)
17548 % lh
->maximum_ops_per_instruction
);
17549 line_ptr
+= bytes_read
;
17552 case DW_LNS_advance_line
:
17555 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17557 line
+= line_delta
;
17558 if (line_delta
!= 0)
17559 line_has_non_zero_discriminator
= discriminator
!= 0;
17560 line_ptr
+= bytes_read
;
17563 case DW_LNS_set_file
:
17565 /* The arrays lh->include_dirs and lh->file_names are
17566 0-based, but the directory and file name numbers in
17567 the statement program are 1-based. */
17568 struct file_entry
*fe
;
17569 const char *dir
= NULL
;
17571 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17572 line_ptr
+= bytes_read
;
17573 if (lh
->num_file_names
< file
|| file
== 0)
17574 dwarf2_debug_line_missing_file_complaint ();
17577 fe
= &lh
->file_names
[file
- 1];
17579 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17580 if (!decode_for_pst_p
)
17582 last_subfile
= current_subfile
;
17583 line_has_non_zero_discriminator
= discriminator
!= 0;
17584 dwarf2_start_subfile (fe
->name
, dir
);
17589 case DW_LNS_set_column
:
17590 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17591 line_ptr
+= bytes_read
;
17593 case DW_LNS_negate_stmt
:
17594 is_stmt
= (!is_stmt
);
17596 case DW_LNS_set_basic_block
:
17598 /* Add to the address register of the state machine the
17599 address increment value corresponding to special opcode
17600 255. I.e., this value is scaled by the minimum
17601 instruction length since special opcode 255 would have
17602 scaled the increment. */
17603 case DW_LNS_const_add_pc
:
17605 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17606 CORE_ADDR addr_adj
;
17608 addr_adj
= (((op_index
+ adjust
)
17609 / lh
->maximum_ops_per_instruction
)
17610 * lh
->minimum_instruction_length
);
17611 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17612 op_index
= ((op_index
+ adjust
)
17613 % lh
->maximum_ops_per_instruction
);
17616 case DW_LNS_fixed_advance_pc
:
17618 CORE_ADDR addr_adj
;
17620 addr_adj
= read_2_bytes (abfd
, line_ptr
);
17621 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17628 /* Unknown standard opcode, ignore it. */
17631 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17633 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17634 line_ptr
+= bytes_read
;
17639 if (lh
->num_file_names
< file
|| file
== 0)
17640 dwarf2_debug_line_missing_file_complaint ();
17643 lh
->file_names
[file
- 1].included_p
= 1;
17644 if (!decode_for_pst_p
)
17646 dwarf_finish_line (gdbarch
, current_subfile
, address
,
17653 /* Decode the Line Number Program (LNP) for the given line_header
17654 structure and CU. The actual information extracted and the type
17655 of structures created from the LNP depends on the value of PST.
17657 1. If PST is NULL, then this procedure uses the data from the program
17658 to create all necessary symbol tables, and their linetables.
17660 2. If PST is not NULL, this procedure reads the program to determine
17661 the list of files included by the unit represented by PST, and
17662 builds all the associated partial symbol tables.
17664 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17665 It is used for relative paths in the line table.
17666 NOTE: When processing partial symtabs (pst != NULL),
17667 comp_dir == pst->dirname.
17669 NOTE: It is important that psymtabs have the same file name (via strcmp)
17670 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17671 symtab we don't use it in the name of the psymtabs we create.
17672 E.g. expand_line_sal requires this when finding psymtabs to expand.
17673 A good testcase for this is mb-inline.exp.
17675 LOWPC is the lowest address in CU (or 0 if not known). */
17678 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17679 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17682 struct objfile
*objfile
= cu
->objfile
;
17683 const int decode_for_pst_p
= (pst
!= NULL
);
17685 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
17687 if (decode_for_pst_p
)
17691 /* Now that we're done scanning the Line Header Program, we can
17692 create the psymtab of each included file. */
17693 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17694 if (lh
->file_names
[file_index
].included_p
== 1)
17696 const char *include_name
=
17697 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17698 if (include_name
!= NULL
)
17699 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17704 /* Make sure a symtab is created for every file, even files
17705 which contain only variables (i.e. no code with associated
17707 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
17710 for (i
= 0; i
< lh
->num_file_names
; i
++)
17712 const char *dir
= NULL
;
17713 struct file_entry
*fe
;
17715 fe
= &lh
->file_names
[i
];
17717 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17718 dwarf2_start_subfile (fe
->name
, dir
);
17720 if (current_subfile
->symtab
== NULL
)
17722 current_subfile
->symtab
17723 = allocate_symtab (cust
, current_subfile
->name
);
17725 fe
->symtab
= current_subfile
->symtab
;
17730 /* Start a subfile for DWARF. FILENAME is the name of the file and
17731 DIRNAME the name of the source directory which contains FILENAME
17732 or NULL if not known.
17733 This routine tries to keep line numbers from identical absolute and
17734 relative file names in a common subfile.
17736 Using the `list' example from the GDB testsuite, which resides in
17737 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17738 of /srcdir/list0.c yields the following debugging information for list0.c:
17740 DW_AT_name: /srcdir/list0.c
17741 DW_AT_comp_dir: /compdir
17742 files.files[0].name: list0.h
17743 files.files[0].dir: /srcdir
17744 files.files[1].name: list0.c
17745 files.files[1].dir: /srcdir
17747 The line number information for list0.c has to end up in a single
17748 subfile, so that `break /srcdir/list0.c:1' works as expected.
17749 start_subfile will ensure that this happens provided that we pass the
17750 concatenation of files.files[1].dir and files.files[1].name as the
17754 dwarf2_start_subfile (const char *filename
, const char *dirname
)
17758 /* In order not to lose the line information directory,
17759 we concatenate it to the filename when it makes sense.
17760 Note that the Dwarf3 standard says (speaking of filenames in line
17761 information): ``The directory index is ignored for file names
17762 that represent full path names''. Thus ignoring dirname in the
17763 `else' branch below isn't an issue. */
17765 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
17767 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
17771 start_subfile (filename
);
17777 /* Start a symtab for DWARF.
17778 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17780 static struct compunit_symtab
*
17781 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
17782 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
17784 struct compunit_symtab
*cust
17785 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
17787 record_debugformat ("DWARF 2");
17788 record_producer (cu
->producer
);
17790 /* We assume that we're processing GCC output. */
17791 processing_gcc_compilation
= 2;
17793 cu
->processing_has_namespace_info
= 0;
17799 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
17800 struct dwarf2_cu
*cu
)
17802 struct objfile
*objfile
= cu
->objfile
;
17803 struct comp_unit_head
*cu_header
= &cu
->header
;
17805 /* NOTE drow/2003-01-30: There used to be a comment and some special
17806 code here to turn a symbol with DW_AT_external and a
17807 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
17808 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
17809 with some versions of binutils) where shared libraries could have
17810 relocations against symbols in their debug information - the
17811 minimal symbol would have the right address, but the debug info
17812 would not. It's no longer necessary, because we will explicitly
17813 apply relocations when we read in the debug information now. */
17815 /* A DW_AT_location attribute with no contents indicates that a
17816 variable has been optimized away. */
17817 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
17819 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
17823 /* Handle one degenerate form of location expression specially, to
17824 preserve GDB's previous behavior when section offsets are
17825 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
17826 then mark this symbol as LOC_STATIC. */
17828 if (attr_form_is_block (attr
)
17829 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
17830 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
17831 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
17832 && (DW_BLOCK (attr
)->size
17833 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
17835 unsigned int dummy
;
17837 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
17838 SYMBOL_VALUE_ADDRESS (sym
) =
17839 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
17841 SYMBOL_VALUE_ADDRESS (sym
) =
17842 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
17843 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
17844 fixup_symbol_section (sym
, objfile
);
17845 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
17846 SYMBOL_SECTION (sym
));
17850 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
17851 expression evaluator, and use LOC_COMPUTED only when necessary
17852 (i.e. when the value of a register or memory location is
17853 referenced, or a thread-local block, etc.). Then again, it might
17854 not be worthwhile. I'm assuming that it isn't unless performance
17855 or memory numbers show me otherwise. */
17857 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
17859 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
17860 cu
->has_loclist
= 1;
17863 /* Given a pointer to a DWARF information entry, figure out if we need
17864 to make a symbol table entry for it, and if so, create a new entry
17865 and return a pointer to it.
17866 If TYPE is NULL, determine symbol type from the die, otherwise
17867 used the passed type.
17868 If SPACE is not NULL, use it to hold the new symbol. If it is
17869 NULL, allocate a new symbol on the objfile's obstack. */
17871 static struct symbol
*
17872 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
17873 struct symbol
*space
)
17875 struct objfile
*objfile
= cu
->objfile
;
17876 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17877 struct symbol
*sym
= NULL
;
17879 struct attribute
*attr
= NULL
;
17880 struct attribute
*attr2
= NULL
;
17881 CORE_ADDR baseaddr
;
17882 struct pending
**list_to_add
= NULL
;
17884 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
17886 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17888 name
= dwarf2_name (die
, cu
);
17891 const char *linkagename
;
17892 int suppress_add
= 0;
17897 sym
= allocate_symbol (objfile
);
17898 OBJSTAT (objfile
, n_syms
++);
17900 /* Cache this symbol's name and the name's demangled form (if any). */
17901 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
17902 linkagename
= dwarf2_physname (name
, die
, cu
);
17903 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
17905 /* Fortran does not have mangling standard and the mangling does differ
17906 between gfortran, iFort etc. */
17907 if (cu
->language
== language_fortran
17908 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
17909 symbol_set_demangled_name (&(sym
->ginfo
),
17910 dwarf2_full_name (name
, die
, cu
),
17913 /* Default assumptions.
17914 Use the passed type or decode it from the die. */
17915 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
17916 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
17918 SYMBOL_TYPE (sym
) = type
;
17920 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
17921 attr
= dwarf2_attr (die
,
17922 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
17926 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
17929 attr
= dwarf2_attr (die
,
17930 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
17934 int file_index
= DW_UNSND (attr
);
17936 if (cu
->line_header
== NULL
17937 || file_index
> cu
->line_header
->num_file_names
)
17938 complaint (&symfile_complaints
,
17939 _("file index out of range"));
17940 else if (file_index
> 0)
17942 struct file_entry
*fe
;
17944 fe
= &cu
->line_header
->file_names
[file_index
- 1];
17945 symbol_set_symtab (sym
, fe
->symtab
);
17952 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
17957 addr
= attr_value_as_address (attr
);
17958 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
17959 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
17961 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
17962 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
17963 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
17964 add_symbol_to_list (sym
, cu
->list_in_scope
);
17966 case DW_TAG_subprogram
:
17967 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17969 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
17970 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
17971 if ((attr2
&& (DW_UNSND (attr2
) != 0))
17972 || cu
->language
== language_ada
)
17974 /* Subprograms marked external are stored as a global symbol.
17975 Ada subprograms, whether marked external or not, are always
17976 stored as a global symbol, because we want to be able to
17977 access them globally. For instance, we want to be able
17978 to break on a nested subprogram without having to
17979 specify the context. */
17980 list_to_add
= &global_symbols
;
17984 list_to_add
= cu
->list_in_scope
;
17987 case DW_TAG_inlined_subroutine
:
17988 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
17990 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
17991 SYMBOL_INLINED (sym
) = 1;
17992 list_to_add
= cu
->list_in_scope
;
17994 case DW_TAG_template_value_param
:
17996 /* Fall through. */
17997 case DW_TAG_constant
:
17998 case DW_TAG_variable
:
17999 case DW_TAG_member
:
18000 /* Compilation with minimal debug info may result in
18001 variables with missing type entries. Change the
18002 misleading `void' type to something sensible. */
18003 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18005 = objfile_type (objfile
)->nodebug_data_symbol
;
18007 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18008 /* In the case of DW_TAG_member, we should only be called for
18009 static const members. */
18010 if (die
->tag
== DW_TAG_member
)
18012 /* dwarf2_add_field uses die_is_declaration,
18013 so we do the same. */
18014 gdb_assert (die_is_declaration (die
, cu
));
18019 dwarf2_const_value (attr
, sym
, cu
);
18020 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18023 if (attr2
&& (DW_UNSND (attr2
) != 0))
18024 list_to_add
= &global_symbols
;
18026 list_to_add
= cu
->list_in_scope
;
18030 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18033 var_decode_location (attr
, sym
, cu
);
18034 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18036 /* Fortran explicitly imports any global symbols to the local
18037 scope by DW_TAG_common_block. */
18038 if (cu
->language
== language_fortran
&& die
->parent
18039 && die
->parent
->tag
== DW_TAG_common_block
)
18042 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18043 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18044 && !dwarf2_per_objfile
->has_section_at_zero
)
18046 /* When a static variable is eliminated by the linker,
18047 the corresponding debug information is not stripped
18048 out, but the variable address is set to null;
18049 do not add such variables into symbol table. */
18051 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18053 /* Workaround gfortran PR debug/40040 - it uses
18054 DW_AT_location for variables in -fPIC libraries which may
18055 get overriden by other libraries/executable and get
18056 a different address. Resolve it by the minimal symbol
18057 which may come from inferior's executable using copy
18058 relocation. Make this workaround only for gfortran as for
18059 other compilers GDB cannot guess the minimal symbol
18060 Fortran mangling kind. */
18061 if (cu
->language
== language_fortran
&& die
->parent
18062 && die
->parent
->tag
== DW_TAG_module
18064 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
18065 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18067 /* A variable with DW_AT_external is never static,
18068 but it may be block-scoped. */
18069 list_to_add
= (cu
->list_in_scope
== &file_symbols
18070 ? &global_symbols
: cu
->list_in_scope
);
18073 list_to_add
= cu
->list_in_scope
;
18077 /* We do not know the address of this symbol.
18078 If it is an external symbol and we have type information
18079 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18080 The address of the variable will then be determined from
18081 the minimal symbol table whenever the variable is
18083 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18085 /* Fortran explicitly imports any global symbols to the local
18086 scope by DW_TAG_common_block. */
18087 if (cu
->language
== language_fortran
&& die
->parent
18088 && die
->parent
->tag
== DW_TAG_common_block
)
18090 /* SYMBOL_CLASS doesn't matter here because
18091 read_common_block is going to reset it. */
18093 list_to_add
= cu
->list_in_scope
;
18095 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18096 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18098 /* A variable with DW_AT_external is never static, but it
18099 may be block-scoped. */
18100 list_to_add
= (cu
->list_in_scope
== &file_symbols
18101 ? &global_symbols
: cu
->list_in_scope
);
18103 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18105 else if (!die_is_declaration (die
, cu
))
18107 /* Use the default LOC_OPTIMIZED_OUT class. */
18108 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18110 list_to_add
= cu
->list_in_scope
;
18114 case DW_TAG_formal_parameter
:
18115 /* If we are inside a function, mark this as an argument. If
18116 not, we might be looking at an argument to an inlined function
18117 when we do not have enough information to show inlined frames;
18118 pretend it's a local variable in that case so that the user can
18120 if (context_stack_depth
> 0
18121 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18122 SYMBOL_IS_ARGUMENT (sym
) = 1;
18123 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18126 var_decode_location (attr
, sym
, cu
);
18128 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18131 dwarf2_const_value (attr
, sym
, cu
);
18134 list_to_add
= cu
->list_in_scope
;
18136 case DW_TAG_unspecified_parameters
:
18137 /* From varargs functions; gdb doesn't seem to have any
18138 interest in this information, so just ignore it for now.
18141 case DW_TAG_template_type_param
:
18143 /* Fall through. */
18144 case DW_TAG_class_type
:
18145 case DW_TAG_interface_type
:
18146 case DW_TAG_structure_type
:
18147 case DW_TAG_union_type
:
18148 case DW_TAG_set_type
:
18149 case DW_TAG_enumeration_type
:
18150 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18151 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18154 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18155 really ever be static objects: otherwise, if you try
18156 to, say, break of a class's method and you're in a file
18157 which doesn't mention that class, it won't work unless
18158 the check for all static symbols in lookup_symbol_aux
18159 saves you. See the OtherFileClass tests in
18160 gdb.c++/namespace.exp. */
18164 list_to_add
= (cu
->list_in_scope
== &file_symbols
18165 && (cu
->language
== language_cplus
18166 || cu
->language
== language_java
)
18167 ? &global_symbols
: cu
->list_in_scope
);
18169 /* The semantics of C++ state that "struct foo {
18170 ... }" also defines a typedef for "foo". A Java
18171 class declaration also defines a typedef for the
18173 if (cu
->language
== language_cplus
18174 || cu
->language
== language_java
18175 || cu
->language
== language_ada
)
18177 /* The symbol's name is already allocated along
18178 with this objfile, so we don't need to
18179 duplicate it for the type. */
18180 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18181 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18186 case DW_TAG_typedef
:
18187 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18188 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18189 list_to_add
= cu
->list_in_scope
;
18191 case DW_TAG_base_type
:
18192 case DW_TAG_subrange_type
:
18193 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18194 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18195 list_to_add
= cu
->list_in_scope
;
18197 case DW_TAG_enumerator
:
18198 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18201 dwarf2_const_value (attr
, sym
, cu
);
18204 /* NOTE: carlton/2003-11-10: See comment above in the
18205 DW_TAG_class_type, etc. block. */
18207 list_to_add
= (cu
->list_in_scope
== &file_symbols
18208 && (cu
->language
== language_cplus
18209 || cu
->language
== language_java
)
18210 ? &global_symbols
: cu
->list_in_scope
);
18213 case DW_TAG_imported_declaration
:
18214 case DW_TAG_namespace
:
18215 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18216 list_to_add
= &global_symbols
;
18218 case DW_TAG_module
:
18219 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18220 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18221 list_to_add
= &global_symbols
;
18223 case DW_TAG_common_block
:
18224 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18225 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18226 add_symbol_to_list (sym
, cu
->list_in_scope
);
18229 /* Not a tag we recognize. Hopefully we aren't processing
18230 trash data, but since we must specifically ignore things
18231 we don't recognize, there is nothing else we should do at
18233 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18234 dwarf_tag_name (die
->tag
));
18240 sym
->hash_next
= objfile
->template_symbols
;
18241 objfile
->template_symbols
= sym
;
18242 list_to_add
= NULL
;
18245 if (list_to_add
!= NULL
)
18246 add_symbol_to_list (sym
, list_to_add
);
18248 /* For the benefit of old versions of GCC, check for anonymous
18249 namespaces based on the demangled name. */
18250 if (!cu
->processing_has_namespace_info
18251 && cu
->language
== language_cplus
)
18252 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18257 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18259 static struct symbol
*
18260 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18262 return new_symbol_full (die
, type
, cu
, NULL
);
18265 /* Given an attr with a DW_FORM_dataN value in host byte order,
18266 zero-extend it as appropriate for the symbol's type. The DWARF
18267 standard (v4) is not entirely clear about the meaning of using
18268 DW_FORM_dataN for a constant with a signed type, where the type is
18269 wider than the data. The conclusion of a discussion on the DWARF
18270 list was that this is unspecified. We choose to always zero-extend
18271 because that is the interpretation long in use by GCC. */
18274 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18275 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18277 struct objfile
*objfile
= cu
->objfile
;
18278 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18279 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18280 LONGEST l
= DW_UNSND (attr
);
18282 if (bits
< sizeof (*value
) * 8)
18284 l
&= ((LONGEST
) 1 << bits
) - 1;
18287 else if (bits
== sizeof (*value
) * 8)
18291 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18292 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18299 /* Read a constant value from an attribute. Either set *VALUE, or if
18300 the value does not fit in *VALUE, set *BYTES - either already
18301 allocated on the objfile obstack, or newly allocated on OBSTACK,
18302 or, set *BATON, if we translated the constant to a location
18306 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18307 const char *name
, struct obstack
*obstack
,
18308 struct dwarf2_cu
*cu
,
18309 LONGEST
*value
, const gdb_byte
**bytes
,
18310 struct dwarf2_locexpr_baton
**baton
)
18312 struct objfile
*objfile
= cu
->objfile
;
18313 struct comp_unit_head
*cu_header
= &cu
->header
;
18314 struct dwarf_block
*blk
;
18315 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18316 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18322 switch (attr
->form
)
18325 case DW_FORM_GNU_addr_index
:
18329 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18330 dwarf2_const_value_length_mismatch_complaint (name
,
18331 cu_header
->addr_size
,
18332 TYPE_LENGTH (type
));
18333 /* Symbols of this form are reasonably rare, so we just
18334 piggyback on the existing location code rather than writing
18335 a new implementation of symbol_computed_ops. */
18336 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18337 (*baton
)->per_cu
= cu
->per_cu
;
18338 gdb_assert ((*baton
)->per_cu
);
18340 (*baton
)->size
= 2 + cu_header
->addr_size
;
18341 data
= obstack_alloc (obstack
, (*baton
)->size
);
18342 (*baton
)->data
= data
;
18344 data
[0] = DW_OP_addr
;
18345 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18346 byte_order
, DW_ADDR (attr
));
18347 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18350 case DW_FORM_string
:
18352 case DW_FORM_GNU_str_index
:
18353 case DW_FORM_GNU_strp_alt
:
18354 /* DW_STRING is already allocated on the objfile obstack, point
18356 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18358 case DW_FORM_block1
:
18359 case DW_FORM_block2
:
18360 case DW_FORM_block4
:
18361 case DW_FORM_block
:
18362 case DW_FORM_exprloc
:
18363 blk
= DW_BLOCK (attr
);
18364 if (TYPE_LENGTH (type
) != blk
->size
)
18365 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18366 TYPE_LENGTH (type
));
18367 *bytes
= blk
->data
;
18370 /* The DW_AT_const_value attributes are supposed to carry the
18371 symbol's value "represented as it would be on the target
18372 architecture." By the time we get here, it's already been
18373 converted to host endianness, so we just need to sign- or
18374 zero-extend it as appropriate. */
18375 case DW_FORM_data1
:
18376 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18378 case DW_FORM_data2
:
18379 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18381 case DW_FORM_data4
:
18382 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18384 case DW_FORM_data8
:
18385 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18388 case DW_FORM_sdata
:
18389 *value
= DW_SND (attr
);
18392 case DW_FORM_udata
:
18393 *value
= DW_UNSND (attr
);
18397 complaint (&symfile_complaints
,
18398 _("unsupported const value attribute form: '%s'"),
18399 dwarf_form_name (attr
->form
));
18406 /* Copy constant value from an attribute to a symbol. */
18409 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18410 struct dwarf2_cu
*cu
)
18412 struct objfile
*objfile
= cu
->objfile
;
18413 struct comp_unit_head
*cu_header
= &cu
->header
;
18415 const gdb_byte
*bytes
;
18416 struct dwarf2_locexpr_baton
*baton
;
18418 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18419 SYMBOL_PRINT_NAME (sym
),
18420 &objfile
->objfile_obstack
, cu
,
18421 &value
, &bytes
, &baton
);
18425 SYMBOL_LOCATION_BATON (sym
) = baton
;
18426 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18428 else if (bytes
!= NULL
)
18430 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18431 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18435 SYMBOL_VALUE (sym
) = value
;
18436 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18440 /* Return the type of the die in question using its DW_AT_type attribute. */
18442 static struct type
*
18443 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18445 struct attribute
*type_attr
;
18447 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18450 /* A missing DW_AT_type represents a void type. */
18451 return objfile_type (cu
->objfile
)->builtin_void
;
18454 return lookup_die_type (die
, type_attr
, cu
);
18457 /* True iff CU's producer generates GNAT Ada auxiliary information
18458 that allows to find parallel types through that information instead
18459 of having to do expensive parallel lookups by type name. */
18462 need_gnat_info (struct dwarf2_cu
*cu
)
18464 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18465 of GNAT produces this auxiliary information, without any indication
18466 that it is produced. Part of enhancing the FSF version of GNAT
18467 to produce that information will be to put in place an indicator
18468 that we can use in order to determine whether the descriptive type
18469 info is available or not. One suggestion that has been made is
18470 to use a new attribute, attached to the CU die. For now, assume
18471 that the descriptive type info is not available. */
18475 /* Return the auxiliary type of the die in question using its
18476 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18477 attribute is not present. */
18479 static struct type
*
18480 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18482 struct attribute
*type_attr
;
18484 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18488 return lookup_die_type (die
, type_attr
, cu
);
18491 /* If DIE has a descriptive_type attribute, then set the TYPE's
18492 descriptive type accordingly. */
18495 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18496 struct dwarf2_cu
*cu
)
18498 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18500 if (descriptive_type
)
18502 ALLOCATE_GNAT_AUX_TYPE (type
);
18503 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18507 /* Return the containing type of the die in question using its
18508 DW_AT_containing_type attribute. */
18510 static struct type
*
18511 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18513 struct attribute
*type_attr
;
18515 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18517 error (_("Dwarf Error: Problem turning containing type into gdb type "
18518 "[in module %s]"), objfile_name (cu
->objfile
));
18520 return lookup_die_type (die
, type_attr
, cu
);
18523 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18525 static struct type
*
18526 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18528 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18529 char *message
, *saved
;
18531 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18532 objfile_name (objfile
),
18533 cu
->header
.offset
.sect_off
,
18534 die
->offset
.sect_off
);
18535 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18536 message
, strlen (message
));
18539 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18542 /* Look up the type of DIE in CU using its type attribute ATTR.
18543 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18544 DW_AT_containing_type.
18545 If there is no type substitute an error marker. */
18547 static struct type
*
18548 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18549 struct dwarf2_cu
*cu
)
18551 struct objfile
*objfile
= cu
->objfile
;
18552 struct type
*this_type
;
18554 gdb_assert (attr
->name
== DW_AT_type
18555 || attr
->name
== DW_AT_GNAT_descriptive_type
18556 || attr
->name
== DW_AT_containing_type
);
18558 /* First see if we have it cached. */
18560 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18562 struct dwarf2_per_cu_data
*per_cu
;
18563 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18565 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18566 this_type
= get_die_type_at_offset (offset
, per_cu
);
18568 else if (attr_form_is_ref (attr
))
18570 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18572 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18574 else if (attr
->form
== DW_FORM_ref_sig8
)
18576 ULONGEST signature
= DW_SIGNATURE (attr
);
18578 return get_signatured_type (die
, signature
, cu
);
18582 complaint (&symfile_complaints
,
18583 _("Dwarf Error: Bad type attribute %s in DIE"
18584 " at 0x%x [in module %s]"),
18585 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18586 objfile_name (objfile
));
18587 return build_error_marker_type (cu
, die
);
18590 /* If not cached we need to read it in. */
18592 if (this_type
== NULL
)
18594 struct die_info
*type_die
= NULL
;
18595 struct dwarf2_cu
*type_cu
= cu
;
18597 if (attr_form_is_ref (attr
))
18598 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18599 if (type_die
== NULL
)
18600 return build_error_marker_type (cu
, die
);
18601 /* If we find the type now, it's probably because the type came
18602 from an inter-CU reference and the type's CU got expanded before
18604 this_type
= read_type_die (type_die
, type_cu
);
18607 /* If we still don't have a type use an error marker. */
18609 if (this_type
== NULL
)
18610 return build_error_marker_type (cu
, die
);
18615 /* Return the type in DIE, CU.
18616 Returns NULL for invalid types.
18618 This first does a lookup in die_type_hash,
18619 and only reads the die in if necessary.
18621 NOTE: This can be called when reading in partial or full symbols. */
18623 static struct type
*
18624 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18626 struct type
*this_type
;
18628 this_type
= get_die_type (die
, cu
);
18632 return read_type_die_1 (die
, cu
);
18635 /* Read the type in DIE, CU.
18636 Returns NULL for invalid types. */
18638 static struct type
*
18639 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18641 struct type
*this_type
= NULL
;
18645 case DW_TAG_class_type
:
18646 case DW_TAG_interface_type
:
18647 case DW_TAG_structure_type
:
18648 case DW_TAG_union_type
:
18649 this_type
= read_structure_type (die
, cu
);
18651 case DW_TAG_enumeration_type
:
18652 this_type
= read_enumeration_type (die
, cu
);
18654 case DW_TAG_subprogram
:
18655 case DW_TAG_subroutine_type
:
18656 case DW_TAG_inlined_subroutine
:
18657 this_type
= read_subroutine_type (die
, cu
);
18659 case DW_TAG_array_type
:
18660 this_type
= read_array_type (die
, cu
);
18662 case DW_TAG_set_type
:
18663 this_type
= read_set_type (die
, cu
);
18665 case DW_TAG_pointer_type
:
18666 this_type
= read_tag_pointer_type (die
, cu
);
18668 case DW_TAG_ptr_to_member_type
:
18669 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18671 case DW_TAG_reference_type
:
18672 this_type
= read_tag_reference_type (die
, cu
);
18674 case DW_TAG_const_type
:
18675 this_type
= read_tag_const_type (die
, cu
);
18677 case DW_TAG_volatile_type
:
18678 this_type
= read_tag_volatile_type (die
, cu
);
18680 case DW_TAG_restrict_type
:
18681 this_type
= read_tag_restrict_type (die
, cu
);
18683 case DW_TAG_string_type
:
18684 this_type
= read_tag_string_type (die
, cu
);
18686 case DW_TAG_typedef
:
18687 this_type
= read_typedef (die
, cu
);
18689 case DW_TAG_subrange_type
:
18690 this_type
= read_subrange_type (die
, cu
);
18692 case DW_TAG_base_type
:
18693 this_type
= read_base_type (die
, cu
);
18695 case DW_TAG_unspecified_type
:
18696 this_type
= read_unspecified_type (die
, cu
);
18698 case DW_TAG_namespace
:
18699 this_type
= read_namespace_type (die
, cu
);
18701 case DW_TAG_module
:
18702 this_type
= read_module_type (die
, cu
);
18705 complaint (&symfile_complaints
,
18706 _("unexpected tag in read_type_die: '%s'"),
18707 dwarf_tag_name (die
->tag
));
18714 /* See if we can figure out if the class lives in a namespace. We do
18715 this by looking for a member function; its demangled name will
18716 contain namespace info, if there is any.
18717 Return the computed name or NULL.
18718 Space for the result is allocated on the objfile's obstack.
18719 This is the full-die version of guess_partial_die_structure_name.
18720 In this case we know DIE has no useful parent. */
18723 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18725 struct die_info
*spec_die
;
18726 struct dwarf2_cu
*spec_cu
;
18727 struct die_info
*child
;
18730 spec_die
= die_specification (die
, &spec_cu
);
18731 if (spec_die
!= NULL
)
18737 for (child
= die
->child
;
18739 child
= child
->sibling
)
18741 if (child
->tag
== DW_TAG_subprogram
)
18743 struct attribute
*attr
;
18745 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18747 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
18751 = language_class_name_from_physname (cu
->language_defn
,
18755 if (actual_name
!= NULL
)
18757 const char *die_name
= dwarf2_name (die
, cu
);
18759 if (die_name
!= NULL
18760 && strcmp (die_name
, actual_name
) != 0)
18762 /* Strip off the class name from the full name.
18763 We want the prefix. */
18764 int die_name_len
= strlen (die_name
);
18765 int actual_name_len
= strlen (actual_name
);
18767 /* Test for '::' as a sanity check. */
18768 if (actual_name_len
> die_name_len
+ 2
18769 && actual_name
[actual_name_len
18770 - die_name_len
- 1] == ':')
18772 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
18774 actual_name_len
- die_name_len
- 2);
18777 xfree (actual_name
);
18786 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18787 prefix part in such case. See
18788 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18791 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18793 struct attribute
*attr
;
18796 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
18797 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
18800 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
18801 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
18804 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
18806 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
18807 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
18810 /* dwarf2_name had to be already called. */
18811 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
18813 /* Strip the base name, keep any leading namespaces/classes. */
18814 base
= strrchr (DW_STRING (attr
), ':');
18815 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
18818 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
18819 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
18822 /* Return the name of the namespace/class that DIE is defined within,
18823 or "" if we can't tell. The caller should not xfree the result.
18825 For example, if we're within the method foo() in the following
18835 then determine_prefix on foo's die will return "N::C". */
18837 static const char *
18838 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18840 struct die_info
*parent
, *spec_die
;
18841 struct dwarf2_cu
*spec_cu
;
18842 struct type
*parent_type
;
18845 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
18846 && cu
->language
!= language_fortran
)
18849 retval
= anonymous_struct_prefix (die
, cu
);
18853 /* We have to be careful in the presence of DW_AT_specification.
18854 For example, with GCC 3.4, given the code
18858 // Definition of N::foo.
18862 then we'll have a tree of DIEs like this:
18864 1: DW_TAG_compile_unit
18865 2: DW_TAG_namespace // N
18866 3: DW_TAG_subprogram // declaration of N::foo
18867 4: DW_TAG_subprogram // definition of N::foo
18868 DW_AT_specification // refers to die #3
18870 Thus, when processing die #4, we have to pretend that we're in
18871 the context of its DW_AT_specification, namely the contex of die
18874 spec_die
= die_specification (die
, &spec_cu
);
18875 if (spec_die
== NULL
)
18876 parent
= die
->parent
;
18879 parent
= spec_die
->parent
;
18883 if (parent
== NULL
)
18885 else if (parent
->building_fullname
)
18888 const char *parent_name
;
18890 /* It has been seen on RealView 2.2 built binaries,
18891 DW_TAG_template_type_param types actually _defined_ as
18892 children of the parent class:
18895 template class <class Enum> Class{};
18896 Class<enum E> class_e;
18898 1: DW_TAG_class_type (Class)
18899 2: DW_TAG_enumeration_type (E)
18900 3: DW_TAG_enumerator (enum1:0)
18901 3: DW_TAG_enumerator (enum2:1)
18903 2: DW_TAG_template_type_param
18904 DW_AT_type DW_FORM_ref_udata (E)
18906 Besides being broken debug info, it can put GDB into an
18907 infinite loop. Consider:
18909 When we're building the full name for Class<E>, we'll start
18910 at Class, and go look over its template type parameters,
18911 finding E. We'll then try to build the full name of E, and
18912 reach here. We're now trying to build the full name of E,
18913 and look over the parent DIE for containing scope. In the
18914 broken case, if we followed the parent DIE of E, we'd again
18915 find Class, and once again go look at its template type
18916 arguments, etc., etc. Simply don't consider such parent die
18917 as source-level parent of this die (it can't be, the language
18918 doesn't allow it), and break the loop here. */
18919 name
= dwarf2_name (die
, cu
);
18920 parent_name
= dwarf2_name (parent
, cu
);
18921 complaint (&symfile_complaints
,
18922 _("template param type '%s' defined within parent '%s'"),
18923 name
? name
: "<unknown>",
18924 parent_name
? parent_name
: "<unknown>");
18928 switch (parent
->tag
)
18930 case DW_TAG_namespace
:
18931 parent_type
= read_type_die (parent
, cu
);
18932 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
18933 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
18934 Work around this problem here. */
18935 if (cu
->language
== language_cplus
18936 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
18938 /* We give a name to even anonymous namespaces. */
18939 return TYPE_TAG_NAME (parent_type
);
18940 case DW_TAG_class_type
:
18941 case DW_TAG_interface_type
:
18942 case DW_TAG_structure_type
:
18943 case DW_TAG_union_type
:
18944 case DW_TAG_module
:
18945 parent_type
= read_type_die (parent
, cu
);
18946 if (TYPE_TAG_NAME (parent_type
) != NULL
)
18947 return TYPE_TAG_NAME (parent_type
);
18949 /* An anonymous structure is only allowed non-static data
18950 members; no typedefs, no member functions, et cetera.
18951 So it does not need a prefix. */
18953 case DW_TAG_compile_unit
:
18954 case DW_TAG_partial_unit
:
18955 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
18956 if (cu
->language
== language_cplus
18957 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
18958 && die
->child
!= NULL
18959 && (die
->tag
== DW_TAG_class_type
18960 || die
->tag
== DW_TAG_structure_type
18961 || die
->tag
== DW_TAG_union_type
))
18963 char *name
= guess_full_die_structure_name (die
, cu
);
18968 case DW_TAG_enumeration_type
:
18969 parent_type
= read_type_die (parent
, cu
);
18970 if (TYPE_DECLARED_CLASS (parent_type
))
18972 if (TYPE_TAG_NAME (parent_type
) != NULL
)
18973 return TYPE_TAG_NAME (parent_type
);
18976 /* Fall through. */
18978 return determine_prefix (parent
, cu
);
18982 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
18983 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
18984 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
18985 an obconcat, otherwise allocate storage for the result. The CU argument is
18986 used to determine the language and hence, the appropriate separator. */
18988 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
18991 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
18992 int physname
, struct dwarf2_cu
*cu
)
18994 const char *lead
= "";
18997 if (suffix
== NULL
|| suffix
[0] == '\0'
18998 || prefix
== NULL
|| prefix
[0] == '\0')
19000 else if (cu
->language
== language_java
)
19002 else if (cu
->language
== language_fortran
&& physname
)
19004 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19005 DW_AT_MIPS_linkage_name is preferred and used instead. */
19013 if (prefix
== NULL
)
19015 if (suffix
== NULL
)
19021 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19023 strcpy (retval
, lead
);
19024 strcat (retval
, prefix
);
19025 strcat (retval
, sep
);
19026 strcat (retval
, suffix
);
19031 /* We have an obstack. */
19032 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19036 /* Return sibling of die, NULL if no sibling. */
19038 static struct die_info
*
19039 sibling_die (struct die_info
*die
)
19041 return die
->sibling
;
19044 /* Get name of a die, return NULL if not found. */
19046 static const char *
19047 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19048 struct obstack
*obstack
)
19050 if (name
&& cu
->language
== language_cplus
)
19052 char *canon_name
= cp_canonicalize_string (name
);
19054 if (canon_name
!= NULL
)
19056 if (strcmp (canon_name
, name
) != 0)
19057 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19058 xfree (canon_name
);
19065 /* Get name of a die, return NULL if not found. */
19067 static const char *
19068 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19070 struct attribute
*attr
;
19072 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19073 if ((!attr
|| !DW_STRING (attr
))
19074 && die
->tag
!= DW_TAG_class_type
19075 && die
->tag
!= DW_TAG_interface_type
19076 && die
->tag
!= DW_TAG_structure_type
19077 && die
->tag
!= DW_TAG_union_type
)
19082 case DW_TAG_compile_unit
:
19083 case DW_TAG_partial_unit
:
19084 /* Compilation units have a DW_AT_name that is a filename, not
19085 a source language identifier. */
19086 case DW_TAG_enumeration_type
:
19087 case DW_TAG_enumerator
:
19088 /* These tags always have simple identifiers already; no need
19089 to canonicalize them. */
19090 return DW_STRING (attr
);
19092 case DW_TAG_subprogram
:
19093 /* Java constructors will all be named "<init>", so return
19094 the class name when we see this special case. */
19095 if (cu
->language
== language_java
19096 && DW_STRING (attr
) != NULL
19097 && strcmp (DW_STRING (attr
), "<init>") == 0)
19099 struct dwarf2_cu
*spec_cu
= cu
;
19100 struct die_info
*spec_die
;
19102 /* GCJ will output '<init>' for Java constructor names.
19103 For this special case, return the name of the parent class. */
19105 /* GCJ may output subprogram DIEs with AT_specification set.
19106 If so, use the name of the specified DIE. */
19107 spec_die
= die_specification (die
, &spec_cu
);
19108 if (spec_die
!= NULL
)
19109 return dwarf2_name (spec_die
, spec_cu
);
19114 if (die
->tag
== DW_TAG_class_type
)
19115 return dwarf2_name (die
, cu
);
19117 while (die
->tag
!= DW_TAG_compile_unit
19118 && die
->tag
!= DW_TAG_partial_unit
);
19122 case DW_TAG_class_type
:
19123 case DW_TAG_interface_type
:
19124 case DW_TAG_structure_type
:
19125 case DW_TAG_union_type
:
19126 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19127 structures or unions. These were of the form "._%d" in GCC 4.1,
19128 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19129 and GCC 4.4. We work around this problem by ignoring these. */
19130 if (attr
&& DW_STRING (attr
)
19131 && (strncmp (DW_STRING (attr
), "._", 2) == 0
19132 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
19135 /* GCC might emit a nameless typedef that has a linkage name. See
19136 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19137 if (!attr
|| DW_STRING (attr
) == NULL
)
19139 char *demangled
= NULL
;
19141 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19143 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19145 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19148 /* Avoid demangling DW_STRING (attr) the second time on a second
19149 call for the same DIE. */
19150 if (!DW_STRING_IS_CANONICAL (attr
))
19151 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19157 /* FIXME: we already did this for the partial symbol... */
19159 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19160 demangled
, strlen (demangled
));
19161 DW_STRING_IS_CANONICAL (attr
) = 1;
19164 /* Strip any leading namespaces/classes, keep only the base name.
19165 DW_AT_name for named DIEs does not contain the prefixes. */
19166 base
= strrchr (DW_STRING (attr
), ':');
19167 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19170 return DW_STRING (attr
);
19179 if (!DW_STRING_IS_CANONICAL (attr
))
19182 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19183 &cu
->objfile
->per_bfd
->storage_obstack
);
19184 DW_STRING_IS_CANONICAL (attr
) = 1;
19186 return DW_STRING (attr
);
19189 /* Return the die that this die in an extension of, or NULL if there
19190 is none. *EXT_CU is the CU containing DIE on input, and the CU
19191 containing the return value on output. */
19193 static struct die_info
*
19194 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19196 struct attribute
*attr
;
19198 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19202 return follow_die_ref (die
, attr
, ext_cu
);
19205 /* Convert a DIE tag into its string name. */
19207 static const char *
19208 dwarf_tag_name (unsigned tag
)
19210 const char *name
= get_DW_TAG_name (tag
);
19213 return "DW_TAG_<unknown>";
19218 /* Convert a DWARF attribute code into its string name. */
19220 static const char *
19221 dwarf_attr_name (unsigned attr
)
19225 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19226 if (attr
== DW_AT_MIPS_fde
)
19227 return "DW_AT_MIPS_fde";
19229 if (attr
== DW_AT_HP_block_index
)
19230 return "DW_AT_HP_block_index";
19233 name
= get_DW_AT_name (attr
);
19236 return "DW_AT_<unknown>";
19241 /* Convert a DWARF value form code into its string name. */
19243 static const char *
19244 dwarf_form_name (unsigned form
)
19246 const char *name
= get_DW_FORM_name (form
);
19249 return "DW_FORM_<unknown>";
19255 dwarf_bool_name (unsigned mybool
)
19263 /* Convert a DWARF type code into its string name. */
19265 static const char *
19266 dwarf_type_encoding_name (unsigned enc
)
19268 const char *name
= get_DW_ATE_name (enc
);
19271 return "DW_ATE_<unknown>";
19277 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19281 print_spaces (indent
, f
);
19282 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19283 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19285 if (die
->parent
!= NULL
)
19287 print_spaces (indent
, f
);
19288 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19289 die
->parent
->offset
.sect_off
);
19292 print_spaces (indent
, f
);
19293 fprintf_unfiltered (f
, " has children: %s\n",
19294 dwarf_bool_name (die
->child
!= NULL
));
19296 print_spaces (indent
, f
);
19297 fprintf_unfiltered (f
, " attributes:\n");
19299 for (i
= 0; i
< die
->num_attrs
; ++i
)
19301 print_spaces (indent
, f
);
19302 fprintf_unfiltered (f
, " %s (%s) ",
19303 dwarf_attr_name (die
->attrs
[i
].name
),
19304 dwarf_form_name (die
->attrs
[i
].form
));
19306 switch (die
->attrs
[i
].form
)
19309 case DW_FORM_GNU_addr_index
:
19310 fprintf_unfiltered (f
, "address: ");
19311 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19313 case DW_FORM_block2
:
19314 case DW_FORM_block4
:
19315 case DW_FORM_block
:
19316 case DW_FORM_block1
:
19317 fprintf_unfiltered (f
, "block: size %s",
19318 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19320 case DW_FORM_exprloc
:
19321 fprintf_unfiltered (f
, "expression: size %s",
19322 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19324 case DW_FORM_ref_addr
:
19325 fprintf_unfiltered (f
, "ref address: ");
19326 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19328 case DW_FORM_GNU_ref_alt
:
19329 fprintf_unfiltered (f
, "alt ref address: ");
19330 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19336 case DW_FORM_ref_udata
:
19337 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19338 (long) (DW_UNSND (&die
->attrs
[i
])));
19340 case DW_FORM_data1
:
19341 case DW_FORM_data2
:
19342 case DW_FORM_data4
:
19343 case DW_FORM_data8
:
19344 case DW_FORM_udata
:
19345 case DW_FORM_sdata
:
19346 fprintf_unfiltered (f
, "constant: %s",
19347 pulongest (DW_UNSND (&die
->attrs
[i
])));
19349 case DW_FORM_sec_offset
:
19350 fprintf_unfiltered (f
, "section offset: %s",
19351 pulongest (DW_UNSND (&die
->attrs
[i
])));
19353 case DW_FORM_ref_sig8
:
19354 fprintf_unfiltered (f
, "signature: %s",
19355 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19357 case DW_FORM_string
:
19359 case DW_FORM_GNU_str_index
:
19360 case DW_FORM_GNU_strp_alt
:
19361 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19362 DW_STRING (&die
->attrs
[i
])
19363 ? DW_STRING (&die
->attrs
[i
]) : "",
19364 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19367 if (DW_UNSND (&die
->attrs
[i
]))
19368 fprintf_unfiltered (f
, "flag: TRUE");
19370 fprintf_unfiltered (f
, "flag: FALSE");
19372 case DW_FORM_flag_present
:
19373 fprintf_unfiltered (f
, "flag: TRUE");
19375 case DW_FORM_indirect
:
19376 /* The reader will have reduced the indirect form to
19377 the "base form" so this form should not occur. */
19378 fprintf_unfiltered (f
,
19379 "unexpected attribute form: DW_FORM_indirect");
19382 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19383 die
->attrs
[i
].form
);
19386 fprintf_unfiltered (f
, "\n");
19391 dump_die_for_error (struct die_info
*die
)
19393 dump_die_shallow (gdb_stderr
, 0, die
);
19397 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19399 int indent
= level
* 4;
19401 gdb_assert (die
!= NULL
);
19403 if (level
>= max_level
)
19406 dump_die_shallow (f
, indent
, die
);
19408 if (die
->child
!= NULL
)
19410 print_spaces (indent
, f
);
19411 fprintf_unfiltered (f
, " Children:");
19412 if (level
+ 1 < max_level
)
19414 fprintf_unfiltered (f
, "\n");
19415 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19419 fprintf_unfiltered (f
,
19420 " [not printed, max nesting level reached]\n");
19424 if (die
->sibling
!= NULL
&& level
> 0)
19426 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19430 /* This is called from the pdie macro in gdbinit.in.
19431 It's not static so gcc will keep a copy callable from gdb. */
19434 dump_die (struct die_info
*die
, int max_level
)
19436 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19440 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19444 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19450 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19454 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19456 sect_offset retval
= { DW_UNSND (attr
) };
19458 if (attr_form_is_ref (attr
))
19461 retval
.sect_off
= 0;
19462 complaint (&symfile_complaints
,
19463 _("unsupported die ref attribute form: '%s'"),
19464 dwarf_form_name (attr
->form
));
19468 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19469 * the value held by the attribute is not constant. */
19472 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19474 if (attr
->form
== DW_FORM_sdata
)
19475 return DW_SND (attr
);
19476 else if (attr
->form
== DW_FORM_udata
19477 || attr
->form
== DW_FORM_data1
19478 || attr
->form
== DW_FORM_data2
19479 || attr
->form
== DW_FORM_data4
19480 || attr
->form
== DW_FORM_data8
)
19481 return DW_UNSND (attr
);
19484 complaint (&symfile_complaints
,
19485 _("Attribute value is not a constant (%s)"),
19486 dwarf_form_name (attr
->form
));
19487 return default_value
;
19491 /* Follow reference or signature attribute ATTR of SRC_DIE.
19492 On entry *REF_CU is the CU of SRC_DIE.
19493 On exit *REF_CU is the CU of the result. */
19495 static struct die_info
*
19496 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19497 struct dwarf2_cu
**ref_cu
)
19499 struct die_info
*die
;
19501 if (attr_form_is_ref (attr
))
19502 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19503 else if (attr
->form
== DW_FORM_ref_sig8
)
19504 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19507 dump_die_for_error (src_die
);
19508 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19509 objfile_name ((*ref_cu
)->objfile
));
19515 /* Follow reference OFFSET.
19516 On entry *REF_CU is the CU of the source die referencing OFFSET.
19517 On exit *REF_CU is the CU of the result.
19518 Returns NULL if OFFSET is invalid. */
19520 static struct die_info
*
19521 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19522 struct dwarf2_cu
**ref_cu
)
19524 struct die_info temp_die
;
19525 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19527 gdb_assert (cu
->per_cu
!= NULL
);
19531 if (cu
->per_cu
->is_debug_types
)
19533 /* .debug_types CUs cannot reference anything outside their CU.
19534 If they need to, they have to reference a signatured type via
19535 DW_FORM_ref_sig8. */
19536 if (! offset_in_cu_p (&cu
->header
, offset
))
19539 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19540 || ! offset_in_cu_p (&cu
->header
, offset
))
19542 struct dwarf2_per_cu_data
*per_cu
;
19544 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19547 /* If necessary, add it to the queue and load its DIEs. */
19548 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19549 load_full_comp_unit (per_cu
, cu
->language
);
19551 target_cu
= per_cu
->cu
;
19553 else if (cu
->dies
== NULL
)
19555 /* We're loading full DIEs during partial symbol reading. */
19556 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19557 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19560 *ref_cu
= target_cu
;
19561 temp_die
.offset
= offset
;
19562 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19565 /* Follow reference attribute ATTR of SRC_DIE.
19566 On entry *REF_CU is the CU of SRC_DIE.
19567 On exit *REF_CU is the CU of the result. */
19569 static struct die_info
*
19570 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19571 struct dwarf2_cu
**ref_cu
)
19573 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19574 struct dwarf2_cu
*cu
= *ref_cu
;
19575 struct die_info
*die
;
19577 die
= follow_die_offset (offset
,
19578 (attr
->form
== DW_FORM_GNU_ref_alt
19579 || cu
->per_cu
->is_dwz
),
19582 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19583 "at 0x%x [in module %s]"),
19584 offset
.sect_off
, src_die
->offset
.sect_off
,
19585 objfile_name (cu
->objfile
));
19590 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19591 Returned value is intended for DW_OP_call*. Returned
19592 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19594 struct dwarf2_locexpr_baton
19595 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19596 struct dwarf2_per_cu_data
*per_cu
,
19597 CORE_ADDR (*get_frame_pc
) (void *baton
),
19600 struct dwarf2_cu
*cu
;
19601 struct die_info
*die
;
19602 struct attribute
*attr
;
19603 struct dwarf2_locexpr_baton retval
;
19605 dw2_setup (per_cu
->objfile
);
19607 if (per_cu
->cu
== NULL
)
19611 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19613 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19614 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19616 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19619 /* DWARF: "If there is no such attribute, then there is no effect.".
19620 DATA is ignored if SIZE is 0. */
19622 retval
.data
= NULL
;
19625 else if (attr_form_is_section_offset (attr
))
19627 struct dwarf2_loclist_baton loclist_baton
;
19628 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19631 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19633 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19635 retval
.size
= size
;
19639 if (!attr_form_is_block (attr
))
19640 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19641 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19642 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19644 retval
.data
= DW_BLOCK (attr
)->data
;
19645 retval
.size
= DW_BLOCK (attr
)->size
;
19647 retval
.per_cu
= cu
->per_cu
;
19649 age_cached_comp_units ();
19654 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19657 struct dwarf2_locexpr_baton
19658 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19659 struct dwarf2_per_cu_data
*per_cu
,
19660 CORE_ADDR (*get_frame_pc
) (void *baton
),
19663 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19665 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19668 /* Write a constant of a given type as target-ordered bytes into
19671 static const gdb_byte
*
19672 write_constant_as_bytes (struct obstack
*obstack
,
19673 enum bfd_endian byte_order
,
19680 *len
= TYPE_LENGTH (type
);
19681 result
= obstack_alloc (obstack
, *len
);
19682 store_unsigned_integer (result
, *len
, byte_order
, value
);
19687 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19688 pointer to the constant bytes and set LEN to the length of the
19689 data. If memory is needed, allocate it on OBSTACK. If the DIE
19690 does not have a DW_AT_const_value, return NULL. */
19693 dwarf2_fetch_constant_bytes (sect_offset offset
,
19694 struct dwarf2_per_cu_data
*per_cu
,
19695 struct obstack
*obstack
,
19698 struct dwarf2_cu
*cu
;
19699 struct die_info
*die
;
19700 struct attribute
*attr
;
19701 const gdb_byte
*result
= NULL
;
19704 enum bfd_endian byte_order
;
19706 dw2_setup (per_cu
->objfile
);
19708 if (per_cu
->cu
== NULL
)
19712 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19714 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19715 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19718 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19722 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19723 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19725 switch (attr
->form
)
19728 case DW_FORM_GNU_addr_index
:
19732 *len
= cu
->header
.addr_size
;
19733 tem
= obstack_alloc (obstack
, *len
);
19734 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19738 case DW_FORM_string
:
19740 case DW_FORM_GNU_str_index
:
19741 case DW_FORM_GNU_strp_alt
:
19742 /* DW_STRING is already allocated on the objfile obstack, point
19744 result
= (const gdb_byte
*) DW_STRING (attr
);
19745 *len
= strlen (DW_STRING (attr
));
19747 case DW_FORM_block1
:
19748 case DW_FORM_block2
:
19749 case DW_FORM_block4
:
19750 case DW_FORM_block
:
19751 case DW_FORM_exprloc
:
19752 result
= DW_BLOCK (attr
)->data
;
19753 *len
= DW_BLOCK (attr
)->size
;
19756 /* The DW_AT_const_value attributes are supposed to carry the
19757 symbol's value "represented as it would be on the target
19758 architecture." By the time we get here, it's already been
19759 converted to host endianness, so we just need to sign- or
19760 zero-extend it as appropriate. */
19761 case DW_FORM_data1
:
19762 type
= die_type (die
, cu
);
19763 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
19764 if (result
== NULL
)
19765 result
= write_constant_as_bytes (obstack
, byte_order
,
19768 case DW_FORM_data2
:
19769 type
= die_type (die
, cu
);
19770 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
19771 if (result
== NULL
)
19772 result
= write_constant_as_bytes (obstack
, byte_order
,
19775 case DW_FORM_data4
:
19776 type
= die_type (die
, cu
);
19777 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
19778 if (result
== NULL
)
19779 result
= write_constant_as_bytes (obstack
, byte_order
,
19782 case DW_FORM_data8
:
19783 type
= die_type (die
, cu
);
19784 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
19785 if (result
== NULL
)
19786 result
= write_constant_as_bytes (obstack
, byte_order
,
19790 case DW_FORM_sdata
:
19791 type
= die_type (die
, cu
);
19792 result
= write_constant_as_bytes (obstack
, byte_order
,
19793 type
, DW_SND (attr
), len
);
19796 case DW_FORM_udata
:
19797 type
= die_type (die
, cu
);
19798 result
= write_constant_as_bytes (obstack
, byte_order
,
19799 type
, DW_UNSND (attr
), len
);
19803 complaint (&symfile_complaints
,
19804 _("unsupported const value attribute form: '%s'"),
19805 dwarf_form_name (attr
->form
));
19812 /* Return the type of the DIE at DIE_OFFSET in the CU named by
19816 dwarf2_get_die_type (cu_offset die_offset
,
19817 struct dwarf2_per_cu_data
*per_cu
)
19819 sect_offset die_offset_sect
;
19821 dw2_setup (per_cu
->objfile
);
19823 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
19824 return get_die_type_at_offset (die_offset_sect
, per_cu
);
19827 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
19828 On entry *REF_CU is the CU of SRC_DIE.
19829 On exit *REF_CU is the CU of the result.
19830 Returns NULL if the referenced DIE isn't found. */
19832 static struct die_info
*
19833 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
19834 struct dwarf2_cu
**ref_cu
)
19836 struct objfile
*objfile
= (*ref_cu
)->objfile
;
19837 struct die_info temp_die
;
19838 struct dwarf2_cu
*sig_cu
;
19839 struct die_info
*die
;
19841 /* While it might be nice to assert sig_type->type == NULL here,
19842 we can get here for DW_AT_imported_declaration where we need
19843 the DIE not the type. */
19845 /* If necessary, add it to the queue and load its DIEs. */
19847 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
19848 read_signatured_type (sig_type
);
19850 sig_cu
= sig_type
->per_cu
.cu
;
19851 gdb_assert (sig_cu
!= NULL
);
19852 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
19853 temp_die
.offset
= sig_type
->type_offset_in_section
;
19854 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
19855 temp_die
.offset
.sect_off
);
19858 /* For .gdb_index version 7 keep track of included TUs.
19859 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
19860 if (dwarf2_per_objfile
->index_table
!= NULL
19861 && dwarf2_per_objfile
->index_table
->version
<= 7)
19863 VEC_safe_push (dwarf2_per_cu_ptr
,
19864 (*ref_cu
)->per_cu
->imported_symtabs
,
19875 /* Follow signatured type referenced by ATTR in SRC_DIE.
19876 On entry *REF_CU is the CU of SRC_DIE.
19877 On exit *REF_CU is the CU of the result.
19878 The result is the DIE of the type.
19879 If the referenced type cannot be found an error is thrown. */
19881 static struct die_info
*
19882 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19883 struct dwarf2_cu
**ref_cu
)
19885 ULONGEST signature
= DW_SIGNATURE (attr
);
19886 struct signatured_type
*sig_type
;
19887 struct die_info
*die
;
19889 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
19891 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
19892 /* sig_type will be NULL if the signatured type is missing from
19894 if (sig_type
== NULL
)
19896 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
19897 " from DIE at 0x%x [in module %s]"),
19898 hex_string (signature
), src_die
->offset
.sect_off
,
19899 objfile_name ((*ref_cu
)->objfile
));
19902 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
19905 dump_die_for_error (src_die
);
19906 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
19907 " from DIE at 0x%x [in module %s]"),
19908 hex_string (signature
), src_die
->offset
.sect_off
,
19909 objfile_name ((*ref_cu
)->objfile
));
19915 /* Get the type specified by SIGNATURE referenced in DIE/CU,
19916 reading in and processing the type unit if necessary. */
19918 static struct type
*
19919 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
19920 struct dwarf2_cu
*cu
)
19922 struct signatured_type
*sig_type
;
19923 struct dwarf2_cu
*type_cu
;
19924 struct die_info
*type_die
;
19927 sig_type
= lookup_signatured_type (cu
, signature
);
19928 /* sig_type will be NULL if the signatured type is missing from
19930 if (sig_type
== NULL
)
19932 complaint (&symfile_complaints
,
19933 _("Dwarf Error: Cannot find signatured DIE %s referenced"
19934 " from DIE at 0x%x [in module %s]"),
19935 hex_string (signature
), die
->offset
.sect_off
,
19936 objfile_name (dwarf2_per_objfile
->objfile
));
19937 return build_error_marker_type (cu
, die
);
19940 /* If we already know the type we're done. */
19941 if (sig_type
->type
!= NULL
)
19942 return sig_type
->type
;
19945 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
19946 if (type_die
!= NULL
)
19948 /* N.B. We need to call get_die_type to ensure only one type for this DIE
19949 is created. This is important, for example, because for c++ classes
19950 we need TYPE_NAME set which is only done by new_symbol. Blech. */
19951 type
= read_type_die (type_die
, type_cu
);
19954 complaint (&symfile_complaints
,
19955 _("Dwarf Error: Cannot build signatured type %s"
19956 " referenced from DIE at 0x%x [in module %s]"),
19957 hex_string (signature
), die
->offset
.sect_off
,
19958 objfile_name (dwarf2_per_objfile
->objfile
));
19959 type
= build_error_marker_type (cu
, die
);
19964 complaint (&symfile_complaints
,
19965 _("Dwarf Error: Problem reading signatured DIE %s referenced"
19966 " from DIE at 0x%x [in module %s]"),
19967 hex_string (signature
), die
->offset
.sect_off
,
19968 objfile_name (dwarf2_per_objfile
->objfile
));
19969 type
= build_error_marker_type (cu
, die
);
19971 sig_type
->type
= type
;
19976 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
19977 reading in and processing the type unit if necessary. */
19979 static struct type
*
19980 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
19981 struct dwarf2_cu
*cu
) /* ARI: editCase function */
19983 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
19984 if (attr_form_is_ref (attr
))
19986 struct dwarf2_cu
*type_cu
= cu
;
19987 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
19989 return read_type_die (type_die
, type_cu
);
19991 else if (attr
->form
== DW_FORM_ref_sig8
)
19993 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
19997 complaint (&symfile_complaints
,
19998 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
19999 " at 0x%x [in module %s]"),
20000 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20001 objfile_name (dwarf2_per_objfile
->objfile
));
20002 return build_error_marker_type (cu
, die
);
20006 /* Load the DIEs associated with type unit PER_CU into memory. */
20009 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20011 struct signatured_type
*sig_type
;
20013 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20014 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20016 /* We have the per_cu, but we need the signatured_type.
20017 Fortunately this is an easy translation. */
20018 gdb_assert (per_cu
->is_debug_types
);
20019 sig_type
= (struct signatured_type
*) per_cu
;
20021 gdb_assert (per_cu
->cu
== NULL
);
20023 read_signatured_type (sig_type
);
20025 gdb_assert (per_cu
->cu
!= NULL
);
20028 /* die_reader_func for read_signatured_type.
20029 This is identical to load_full_comp_unit_reader,
20030 but is kept separate for now. */
20033 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20034 const gdb_byte
*info_ptr
,
20035 struct die_info
*comp_unit_die
,
20039 struct dwarf2_cu
*cu
= reader
->cu
;
20041 gdb_assert (cu
->die_hash
== NULL
);
20043 htab_create_alloc_ex (cu
->header
.length
/ 12,
20047 &cu
->comp_unit_obstack
,
20048 hashtab_obstack_allocate
,
20049 dummy_obstack_deallocate
);
20052 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20053 &info_ptr
, comp_unit_die
);
20054 cu
->dies
= comp_unit_die
;
20055 /* comp_unit_die is not stored in die_hash, no need. */
20057 /* We try not to read any attributes in this function, because not
20058 all CUs needed for references have been loaded yet, and symbol
20059 table processing isn't initialized. But we have to set the CU language,
20060 or we won't be able to build types correctly.
20061 Similarly, if we do not read the producer, we can not apply
20062 producer-specific interpretation. */
20063 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20066 /* Read in a signatured type and build its CU and DIEs.
20067 If the type is a stub for the real type in a DWO file,
20068 read in the real type from the DWO file as well. */
20071 read_signatured_type (struct signatured_type
*sig_type
)
20073 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20075 gdb_assert (per_cu
->is_debug_types
);
20076 gdb_assert (per_cu
->cu
== NULL
);
20078 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20079 read_signatured_type_reader
, NULL
);
20080 sig_type
->per_cu
.tu_read
= 1;
20083 /* Decode simple location descriptions.
20084 Given a pointer to a dwarf block that defines a location, compute
20085 the location and return the value.
20087 NOTE drow/2003-11-18: This function is called in two situations
20088 now: for the address of static or global variables (partial symbols
20089 only) and for offsets into structures which are expected to be
20090 (more or less) constant. The partial symbol case should go away,
20091 and only the constant case should remain. That will let this
20092 function complain more accurately. A few special modes are allowed
20093 without complaint for global variables (for instance, global
20094 register values and thread-local values).
20096 A location description containing no operations indicates that the
20097 object is optimized out. The return value is 0 for that case.
20098 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20099 callers will only want a very basic result and this can become a
20102 Note that stack[0] is unused except as a default error return. */
20105 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20107 struct objfile
*objfile
= cu
->objfile
;
20109 size_t size
= blk
->size
;
20110 const gdb_byte
*data
= blk
->data
;
20111 CORE_ADDR stack
[64];
20113 unsigned int bytes_read
, unsnd
;
20119 stack
[++stacki
] = 0;
20158 stack
[++stacki
] = op
- DW_OP_lit0
;
20193 stack
[++stacki
] = op
- DW_OP_reg0
;
20195 dwarf2_complex_location_expr_complaint ();
20199 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20201 stack
[++stacki
] = unsnd
;
20203 dwarf2_complex_location_expr_complaint ();
20207 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20212 case DW_OP_const1u
:
20213 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20217 case DW_OP_const1s
:
20218 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20222 case DW_OP_const2u
:
20223 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20227 case DW_OP_const2s
:
20228 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20232 case DW_OP_const4u
:
20233 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20237 case DW_OP_const4s
:
20238 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20242 case DW_OP_const8u
:
20243 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20248 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20254 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20259 stack
[stacki
+ 1] = stack
[stacki
];
20264 stack
[stacki
- 1] += stack
[stacki
];
20268 case DW_OP_plus_uconst
:
20269 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20275 stack
[stacki
- 1] -= stack
[stacki
];
20280 /* If we're not the last op, then we definitely can't encode
20281 this using GDB's address_class enum. This is valid for partial
20282 global symbols, although the variable's address will be bogus
20285 dwarf2_complex_location_expr_complaint ();
20288 case DW_OP_GNU_push_tls_address
:
20289 /* The top of the stack has the offset from the beginning
20290 of the thread control block at which the variable is located. */
20291 /* Nothing should follow this operator, so the top of stack would
20293 /* This is valid for partial global symbols, but the variable's
20294 address will be bogus in the psymtab. Make it always at least
20295 non-zero to not look as a variable garbage collected by linker
20296 which have DW_OP_addr 0. */
20298 dwarf2_complex_location_expr_complaint ();
20302 case DW_OP_GNU_uninit
:
20305 case DW_OP_GNU_addr_index
:
20306 case DW_OP_GNU_const_index
:
20307 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20314 const char *name
= get_DW_OP_name (op
);
20317 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20320 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20324 return (stack
[stacki
]);
20327 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20328 outside of the allocated space. Also enforce minimum>0. */
20329 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20331 complaint (&symfile_complaints
,
20332 _("location description stack overflow"));
20338 complaint (&symfile_complaints
,
20339 _("location description stack underflow"));
20343 return (stack
[stacki
]);
20346 /* memory allocation interface */
20348 static struct dwarf_block
*
20349 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20351 struct dwarf_block
*blk
;
20353 blk
= (struct dwarf_block
*)
20354 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20358 static struct die_info
*
20359 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20361 struct die_info
*die
;
20362 size_t size
= sizeof (struct die_info
);
20365 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20367 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20368 memset (die
, 0, sizeof (struct die_info
));
20373 /* Macro support. */
20375 /* Return file name relative to the compilation directory of file number I in
20376 *LH's file name table. The result is allocated using xmalloc; the caller is
20377 responsible for freeing it. */
20380 file_file_name (int file
, struct line_header
*lh
)
20382 /* Is the file number a valid index into the line header's file name
20383 table? Remember that file numbers start with one, not zero. */
20384 if (1 <= file
&& file
<= lh
->num_file_names
)
20386 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20388 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
20389 return xstrdup (fe
->name
);
20390 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20395 /* The compiler produced a bogus file number. We can at least
20396 record the macro definitions made in the file, even if we
20397 won't be able to find the file by name. */
20398 char fake_name
[80];
20400 xsnprintf (fake_name
, sizeof (fake_name
),
20401 "<bad macro file number %d>", file
);
20403 complaint (&symfile_complaints
,
20404 _("bad file number in macro information (%d)"),
20407 return xstrdup (fake_name
);
20411 /* Return the full name of file number I in *LH's file name table.
20412 Use COMP_DIR as the name of the current directory of the
20413 compilation. The result is allocated using xmalloc; the caller is
20414 responsible for freeing it. */
20416 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20418 /* Is the file number a valid index into the line header's file name
20419 table? Remember that file numbers start with one, not zero. */
20420 if (1 <= file
&& file
<= lh
->num_file_names
)
20422 char *relative
= file_file_name (file
, lh
);
20424 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20426 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20429 return file_file_name (file
, lh
);
20433 static struct macro_source_file
*
20434 macro_start_file (int file
, int line
,
20435 struct macro_source_file
*current_file
,
20436 struct line_header
*lh
)
20438 /* File name relative to the compilation directory of this source file. */
20439 char *file_name
= file_file_name (file
, lh
);
20441 if (! current_file
)
20443 /* Note: We don't create a macro table for this compilation unit
20444 at all until we actually get a filename. */
20445 struct macro_table
*macro_table
= get_macro_table ();
20447 /* If we have no current file, then this must be the start_file
20448 directive for the compilation unit's main source file. */
20449 current_file
= macro_set_main (macro_table
, file_name
);
20450 macro_define_special (macro_table
);
20453 current_file
= macro_include (current_file
, line
, file_name
);
20457 return current_file
;
20461 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20462 followed by a null byte. */
20464 copy_string (const char *buf
, int len
)
20466 char *s
= xmalloc (len
+ 1);
20468 memcpy (s
, buf
, len
);
20474 static const char *
20475 consume_improper_spaces (const char *p
, const char *body
)
20479 complaint (&symfile_complaints
,
20480 _("macro definition contains spaces "
20481 "in formal argument list:\n`%s'"),
20493 parse_macro_definition (struct macro_source_file
*file
, int line
,
20498 /* The body string takes one of two forms. For object-like macro
20499 definitions, it should be:
20501 <macro name> " " <definition>
20503 For function-like macro definitions, it should be:
20505 <macro name> "() " <definition>
20507 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20509 Spaces may appear only where explicitly indicated, and in the
20512 The Dwarf 2 spec says that an object-like macro's name is always
20513 followed by a space, but versions of GCC around March 2002 omit
20514 the space when the macro's definition is the empty string.
20516 The Dwarf 2 spec says that there should be no spaces between the
20517 formal arguments in a function-like macro's formal argument list,
20518 but versions of GCC around March 2002 include spaces after the
20522 /* Find the extent of the macro name. The macro name is terminated
20523 by either a space or null character (for an object-like macro) or
20524 an opening paren (for a function-like macro). */
20525 for (p
= body
; *p
; p
++)
20526 if (*p
== ' ' || *p
== '(')
20529 if (*p
== ' ' || *p
== '\0')
20531 /* It's an object-like macro. */
20532 int name_len
= p
- body
;
20533 char *name
= copy_string (body
, name_len
);
20534 const char *replacement
;
20537 replacement
= body
+ name_len
+ 1;
20540 dwarf2_macro_malformed_definition_complaint (body
);
20541 replacement
= body
+ name_len
;
20544 macro_define_object (file
, line
, name
, replacement
);
20548 else if (*p
== '(')
20550 /* It's a function-like macro. */
20551 char *name
= copy_string (body
, p
- body
);
20554 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20558 p
= consume_improper_spaces (p
, body
);
20560 /* Parse the formal argument list. */
20561 while (*p
&& *p
!= ')')
20563 /* Find the extent of the current argument name. */
20564 const char *arg_start
= p
;
20566 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20569 if (! *p
|| p
== arg_start
)
20570 dwarf2_macro_malformed_definition_complaint (body
);
20573 /* Make sure argv has room for the new argument. */
20574 if (argc
>= argv_size
)
20577 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20580 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20583 p
= consume_improper_spaces (p
, body
);
20585 /* Consume the comma, if present. */
20590 p
= consume_improper_spaces (p
, body
);
20599 /* Perfectly formed definition, no complaints. */
20600 macro_define_function (file
, line
, name
,
20601 argc
, (const char **) argv
,
20603 else if (*p
== '\0')
20605 /* Complain, but do define it. */
20606 dwarf2_macro_malformed_definition_complaint (body
);
20607 macro_define_function (file
, line
, name
,
20608 argc
, (const char **) argv
,
20612 /* Just complain. */
20613 dwarf2_macro_malformed_definition_complaint (body
);
20616 /* Just complain. */
20617 dwarf2_macro_malformed_definition_complaint (body
);
20623 for (i
= 0; i
< argc
; i
++)
20629 dwarf2_macro_malformed_definition_complaint (body
);
20632 /* Skip some bytes from BYTES according to the form given in FORM.
20633 Returns the new pointer. */
20635 static const gdb_byte
*
20636 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20637 enum dwarf_form form
,
20638 unsigned int offset_size
,
20639 struct dwarf2_section_info
*section
)
20641 unsigned int bytes_read
;
20645 case DW_FORM_data1
:
20650 case DW_FORM_data2
:
20654 case DW_FORM_data4
:
20658 case DW_FORM_data8
:
20662 case DW_FORM_string
:
20663 read_direct_string (abfd
, bytes
, &bytes_read
);
20664 bytes
+= bytes_read
;
20667 case DW_FORM_sec_offset
:
20669 case DW_FORM_GNU_strp_alt
:
20670 bytes
+= offset_size
;
20673 case DW_FORM_block
:
20674 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20675 bytes
+= bytes_read
;
20678 case DW_FORM_block1
:
20679 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20681 case DW_FORM_block2
:
20682 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20684 case DW_FORM_block4
:
20685 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20688 case DW_FORM_sdata
:
20689 case DW_FORM_udata
:
20690 case DW_FORM_GNU_addr_index
:
20691 case DW_FORM_GNU_str_index
:
20692 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20695 dwarf2_section_buffer_overflow_complaint (section
);
20703 complaint (&symfile_complaints
,
20704 _("invalid form 0x%x in `%s'"),
20705 form
, get_section_name (section
));
20713 /* A helper for dwarf_decode_macros that handles skipping an unknown
20714 opcode. Returns an updated pointer to the macro data buffer; or,
20715 on error, issues a complaint and returns NULL. */
20717 static const gdb_byte
*
20718 skip_unknown_opcode (unsigned int opcode
,
20719 const gdb_byte
**opcode_definitions
,
20720 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20722 unsigned int offset_size
,
20723 struct dwarf2_section_info
*section
)
20725 unsigned int bytes_read
, i
;
20727 const gdb_byte
*defn
;
20729 if (opcode_definitions
[opcode
] == NULL
)
20731 complaint (&symfile_complaints
,
20732 _("unrecognized DW_MACFINO opcode 0x%x"),
20737 defn
= opcode_definitions
[opcode
];
20738 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20739 defn
+= bytes_read
;
20741 for (i
= 0; i
< arg
; ++i
)
20743 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
20745 if (mac_ptr
== NULL
)
20747 /* skip_form_bytes already issued the complaint. */
20755 /* A helper function which parses the header of a macro section.
20756 If the macro section is the extended (for now called "GNU") type,
20757 then this updates *OFFSET_SIZE. Returns a pointer to just after
20758 the header, or issues a complaint and returns NULL on error. */
20760 static const gdb_byte
*
20761 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
20763 const gdb_byte
*mac_ptr
,
20764 unsigned int *offset_size
,
20765 int section_is_gnu
)
20767 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
20769 if (section_is_gnu
)
20771 unsigned int version
, flags
;
20773 version
= read_2_bytes (abfd
, mac_ptr
);
20776 complaint (&symfile_complaints
,
20777 _("unrecognized version `%d' in .debug_macro section"),
20783 flags
= read_1_byte (abfd
, mac_ptr
);
20785 *offset_size
= (flags
& 1) ? 8 : 4;
20787 if ((flags
& 2) != 0)
20788 /* We don't need the line table offset. */
20789 mac_ptr
+= *offset_size
;
20791 /* Vendor opcode descriptions. */
20792 if ((flags
& 4) != 0)
20794 unsigned int i
, count
;
20796 count
= read_1_byte (abfd
, mac_ptr
);
20798 for (i
= 0; i
< count
; ++i
)
20800 unsigned int opcode
, bytes_read
;
20803 opcode
= read_1_byte (abfd
, mac_ptr
);
20805 opcode_definitions
[opcode
] = mac_ptr
;
20806 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20807 mac_ptr
+= bytes_read
;
20816 /* A helper for dwarf_decode_macros that handles the GNU extensions,
20817 including DW_MACRO_GNU_transparent_include. */
20820 dwarf_decode_macro_bytes (bfd
*abfd
,
20821 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20822 struct macro_source_file
*current_file
,
20823 struct line_header
*lh
,
20824 struct dwarf2_section_info
*section
,
20825 int section_is_gnu
, int section_is_dwz
,
20826 unsigned int offset_size
,
20827 htab_t include_hash
)
20829 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20830 enum dwarf_macro_record_type macinfo_type
;
20831 int at_commandline
;
20832 const gdb_byte
*opcode_definitions
[256];
20834 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
20835 &offset_size
, section_is_gnu
);
20836 if (mac_ptr
== NULL
)
20838 /* We already issued a complaint. */
20842 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
20843 GDB is still reading the definitions from command line. First
20844 DW_MACINFO_start_file will need to be ignored as it was already executed
20845 to create CURRENT_FILE for the main source holding also the command line
20846 definitions. On first met DW_MACINFO_start_file this flag is reset to
20847 normally execute all the remaining DW_MACINFO_start_file macinfos. */
20849 at_commandline
= 1;
20853 /* Do we at least have room for a macinfo type byte? */
20854 if (mac_ptr
>= mac_end
)
20856 dwarf2_section_buffer_overflow_complaint (section
);
20860 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
20863 /* Note that we rely on the fact that the corresponding GNU and
20864 DWARF constants are the same. */
20865 switch (macinfo_type
)
20867 /* A zero macinfo type indicates the end of the macro
20872 case DW_MACRO_GNU_define
:
20873 case DW_MACRO_GNU_undef
:
20874 case DW_MACRO_GNU_define_indirect
:
20875 case DW_MACRO_GNU_undef_indirect
:
20876 case DW_MACRO_GNU_define_indirect_alt
:
20877 case DW_MACRO_GNU_undef_indirect_alt
:
20879 unsigned int bytes_read
;
20884 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20885 mac_ptr
+= bytes_read
;
20887 if (macinfo_type
== DW_MACRO_GNU_define
20888 || macinfo_type
== DW_MACRO_GNU_undef
)
20890 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
20891 mac_ptr
+= bytes_read
;
20895 LONGEST str_offset
;
20897 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
20898 mac_ptr
+= offset_size
;
20900 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
20901 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
20904 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
20906 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
20909 body
= read_indirect_string_at_offset (abfd
, str_offset
);
20912 is_define
= (macinfo_type
== DW_MACRO_GNU_define
20913 || macinfo_type
== DW_MACRO_GNU_define_indirect
20914 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
20915 if (! current_file
)
20917 /* DWARF violation as no main source is present. */
20918 complaint (&symfile_complaints
,
20919 _("debug info with no main source gives macro %s "
20921 is_define
? _("definition") : _("undefinition"),
20925 if ((line
== 0 && !at_commandline
)
20926 || (line
!= 0 && at_commandline
))
20927 complaint (&symfile_complaints
,
20928 _("debug info gives %s macro %s with %s line %d: %s"),
20929 at_commandline
? _("command-line") : _("in-file"),
20930 is_define
? _("definition") : _("undefinition"),
20931 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
20934 parse_macro_definition (current_file
, line
, body
);
20937 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
20938 || macinfo_type
== DW_MACRO_GNU_undef_indirect
20939 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
20940 macro_undef (current_file
, line
, body
);
20945 case DW_MACRO_GNU_start_file
:
20947 unsigned int bytes_read
;
20950 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20951 mac_ptr
+= bytes_read
;
20952 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20953 mac_ptr
+= bytes_read
;
20955 if ((line
== 0 && !at_commandline
)
20956 || (line
!= 0 && at_commandline
))
20957 complaint (&symfile_complaints
,
20958 _("debug info gives source %d included "
20959 "from %s at %s line %d"),
20960 file
, at_commandline
? _("command-line") : _("file"),
20961 line
== 0 ? _("zero") : _("non-zero"), line
);
20963 if (at_commandline
)
20965 /* This DW_MACRO_GNU_start_file was executed in the
20967 at_commandline
= 0;
20970 current_file
= macro_start_file (file
, line
, current_file
, lh
);
20974 case DW_MACRO_GNU_end_file
:
20975 if (! current_file
)
20976 complaint (&symfile_complaints
,
20977 _("macro debug info has an unmatched "
20978 "`close_file' directive"));
20981 current_file
= current_file
->included_by
;
20982 if (! current_file
)
20984 enum dwarf_macro_record_type next_type
;
20986 /* GCC circa March 2002 doesn't produce the zero
20987 type byte marking the end of the compilation
20988 unit. Complain if it's not there, but exit no
20991 /* Do we at least have room for a macinfo type byte? */
20992 if (mac_ptr
>= mac_end
)
20994 dwarf2_section_buffer_overflow_complaint (section
);
20998 /* We don't increment mac_ptr here, so this is just
21000 next_type
= read_1_byte (abfd
, mac_ptr
);
21001 if (next_type
!= 0)
21002 complaint (&symfile_complaints
,
21003 _("no terminating 0-type entry for "
21004 "macros in `.debug_macinfo' section"));
21011 case DW_MACRO_GNU_transparent_include
:
21012 case DW_MACRO_GNU_transparent_include_alt
:
21016 bfd
*include_bfd
= abfd
;
21017 struct dwarf2_section_info
*include_section
= section
;
21018 struct dwarf2_section_info alt_section
;
21019 const gdb_byte
*include_mac_end
= mac_end
;
21020 int is_dwz
= section_is_dwz
;
21021 const gdb_byte
*new_mac_ptr
;
21023 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21024 mac_ptr
+= offset_size
;
21026 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21028 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21030 dwarf2_read_section (objfile
, &dwz
->macro
);
21032 include_section
= &dwz
->macro
;
21033 include_bfd
= get_section_bfd_owner (include_section
);
21034 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21038 new_mac_ptr
= include_section
->buffer
+ offset
;
21039 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21043 /* This has actually happened; see
21044 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21045 complaint (&symfile_complaints
,
21046 _("recursive DW_MACRO_GNU_transparent_include in "
21047 ".debug_macro section"));
21051 *slot
= (void *) new_mac_ptr
;
21053 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21054 include_mac_end
, current_file
, lh
,
21055 section
, section_is_gnu
, is_dwz
,
21056 offset_size
, include_hash
);
21058 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21063 case DW_MACINFO_vendor_ext
:
21064 if (!section_is_gnu
)
21066 unsigned int bytes_read
;
21069 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21070 mac_ptr
+= bytes_read
;
21071 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21072 mac_ptr
+= bytes_read
;
21074 /* We don't recognize any vendor extensions. */
21080 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21081 mac_ptr
, mac_end
, abfd
, offset_size
,
21083 if (mac_ptr
== NULL
)
21087 } while (macinfo_type
!= 0);
21091 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21092 int section_is_gnu
)
21094 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21095 struct line_header
*lh
= cu
->line_header
;
21097 const gdb_byte
*mac_ptr
, *mac_end
;
21098 struct macro_source_file
*current_file
= 0;
21099 enum dwarf_macro_record_type macinfo_type
;
21100 unsigned int offset_size
= cu
->header
.offset_size
;
21101 const gdb_byte
*opcode_definitions
[256];
21102 struct cleanup
*cleanup
;
21103 htab_t include_hash
;
21105 struct dwarf2_section_info
*section
;
21106 const char *section_name
;
21108 if (cu
->dwo_unit
!= NULL
)
21110 if (section_is_gnu
)
21112 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21113 section_name
= ".debug_macro.dwo";
21117 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21118 section_name
= ".debug_macinfo.dwo";
21123 if (section_is_gnu
)
21125 section
= &dwarf2_per_objfile
->macro
;
21126 section_name
= ".debug_macro";
21130 section
= &dwarf2_per_objfile
->macinfo
;
21131 section_name
= ".debug_macinfo";
21135 dwarf2_read_section (objfile
, section
);
21136 if (section
->buffer
== NULL
)
21138 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21141 abfd
= get_section_bfd_owner (section
);
21143 /* First pass: Find the name of the base filename.
21144 This filename is needed in order to process all macros whose definition
21145 (or undefinition) comes from the command line. These macros are defined
21146 before the first DW_MACINFO_start_file entry, and yet still need to be
21147 associated to the base file.
21149 To determine the base file name, we scan the macro definitions until we
21150 reach the first DW_MACINFO_start_file entry. We then initialize
21151 CURRENT_FILE accordingly so that any macro definition found before the
21152 first DW_MACINFO_start_file can still be associated to the base file. */
21154 mac_ptr
= section
->buffer
+ offset
;
21155 mac_end
= section
->buffer
+ section
->size
;
21157 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21158 &offset_size
, section_is_gnu
);
21159 if (mac_ptr
== NULL
)
21161 /* We already issued a complaint. */
21167 /* Do we at least have room for a macinfo type byte? */
21168 if (mac_ptr
>= mac_end
)
21170 /* Complaint is printed during the second pass as GDB will probably
21171 stop the first pass earlier upon finding
21172 DW_MACINFO_start_file. */
21176 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21179 /* Note that we rely on the fact that the corresponding GNU and
21180 DWARF constants are the same. */
21181 switch (macinfo_type
)
21183 /* A zero macinfo type indicates the end of the macro
21188 case DW_MACRO_GNU_define
:
21189 case DW_MACRO_GNU_undef
:
21190 /* Only skip the data by MAC_PTR. */
21192 unsigned int bytes_read
;
21194 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21195 mac_ptr
+= bytes_read
;
21196 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21197 mac_ptr
+= bytes_read
;
21201 case DW_MACRO_GNU_start_file
:
21203 unsigned int bytes_read
;
21206 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21207 mac_ptr
+= bytes_read
;
21208 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21209 mac_ptr
+= bytes_read
;
21211 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21215 case DW_MACRO_GNU_end_file
:
21216 /* No data to skip by MAC_PTR. */
21219 case DW_MACRO_GNU_define_indirect
:
21220 case DW_MACRO_GNU_undef_indirect
:
21221 case DW_MACRO_GNU_define_indirect_alt
:
21222 case DW_MACRO_GNU_undef_indirect_alt
:
21224 unsigned int bytes_read
;
21226 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21227 mac_ptr
+= bytes_read
;
21228 mac_ptr
+= offset_size
;
21232 case DW_MACRO_GNU_transparent_include
:
21233 case DW_MACRO_GNU_transparent_include_alt
:
21234 /* Note that, according to the spec, a transparent include
21235 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21236 skip this opcode. */
21237 mac_ptr
+= offset_size
;
21240 case DW_MACINFO_vendor_ext
:
21241 /* Only skip the data by MAC_PTR. */
21242 if (!section_is_gnu
)
21244 unsigned int bytes_read
;
21246 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21247 mac_ptr
+= bytes_read
;
21248 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21249 mac_ptr
+= bytes_read
;
21254 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21255 mac_ptr
, mac_end
, abfd
, offset_size
,
21257 if (mac_ptr
== NULL
)
21261 } while (macinfo_type
!= 0 && current_file
== NULL
);
21263 /* Second pass: Process all entries.
21265 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21266 command-line macro definitions/undefinitions. This flag is unset when we
21267 reach the first DW_MACINFO_start_file entry. */
21269 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21270 NULL
, xcalloc
, xfree
);
21271 cleanup
= make_cleanup_htab_delete (include_hash
);
21272 mac_ptr
= section
->buffer
+ offset
;
21273 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21274 *slot
= (void *) mac_ptr
;
21275 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21276 current_file
, lh
, section
,
21277 section_is_gnu
, 0, offset_size
, include_hash
);
21278 do_cleanups (cleanup
);
21281 /* Check if the attribute's form is a DW_FORM_block*
21282 if so return true else false. */
21285 attr_form_is_block (const struct attribute
*attr
)
21287 return (attr
== NULL
? 0 :
21288 attr
->form
== DW_FORM_block1
21289 || attr
->form
== DW_FORM_block2
21290 || attr
->form
== DW_FORM_block4
21291 || attr
->form
== DW_FORM_block
21292 || attr
->form
== DW_FORM_exprloc
);
21295 /* Return non-zero if ATTR's value is a section offset --- classes
21296 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21297 You may use DW_UNSND (attr) to retrieve such offsets.
21299 Section 7.5.4, "Attribute Encodings", explains that no attribute
21300 may have a value that belongs to more than one of these classes; it
21301 would be ambiguous if we did, because we use the same forms for all
21305 attr_form_is_section_offset (const struct attribute
*attr
)
21307 return (attr
->form
== DW_FORM_data4
21308 || attr
->form
== DW_FORM_data8
21309 || attr
->form
== DW_FORM_sec_offset
);
21312 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21313 zero otherwise. When this function returns true, you can apply
21314 dwarf2_get_attr_constant_value to it.
21316 However, note that for some attributes you must check
21317 attr_form_is_section_offset before using this test. DW_FORM_data4
21318 and DW_FORM_data8 are members of both the constant class, and of
21319 the classes that contain offsets into other debug sections
21320 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21321 that, if an attribute's can be either a constant or one of the
21322 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21323 taken as section offsets, not constants. */
21326 attr_form_is_constant (const struct attribute
*attr
)
21328 switch (attr
->form
)
21330 case DW_FORM_sdata
:
21331 case DW_FORM_udata
:
21332 case DW_FORM_data1
:
21333 case DW_FORM_data2
:
21334 case DW_FORM_data4
:
21335 case DW_FORM_data8
:
21343 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21344 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21347 attr_form_is_ref (const struct attribute
*attr
)
21349 switch (attr
->form
)
21351 case DW_FORM_ref_addr
:
21356 case DW_FORM_ref_udata
:
21357 case DW_FORM_GNU_ref_alt
:
21364 /* Return the .debug_loc section to use for CU.
21365 For DWO files use .debug_loc.dwo. */
21367 static struct dwarf2_section_info
*
21368 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21371 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21372 return &dwarf2_per_objfile
->loc
;
21375 /* A helper function that fills in a dwarf2_loclist_baton. */
21378 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21379 struct dwarf2_loclist_baton
*baton
,
21380 const struct attribute
*attr
)
21382 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21384 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21386 baton
->per_cu
= cu
->per_cu
;
21387 gdb_assert (baton
->per_cu
);
21388 /* We don't know how long the location list is, but make sure we
21389 don't run off the edge of the section. */
21390 baton
->size
= section
->size
- DW_UNSND (attr
);
21391 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21392 baton
->base_address
= cu
->base_address
;
21393 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21397 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21398 struct dwarf2_cu
*cu
, int is_block
)
21400 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21401 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21403 if (attr_form_is_section_offset (attr
)
21404 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21405 the section. If so, fall through to the complaint in the
21407 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21409 struct dwarf2_loclist_baton
*baton
;
21411 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21412 sizeof (struct dwarf2_loclist_baton
));
21414 fill_in_loclist_baton (cu
, baton
, attr
);
21416 if (cu
->base_known
== 0)
21417 complaint (&symfile_complaints
,
21418 _("Location list used without "
21419 "specifying the CU base address."));
21421 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21422 ? dwarf2_loclist_block_index
21423 : dwarf2_loclist_index
);
21424 SYMBOL_LOCATION_BATON (sym
) = baton
;
21428 struct dwarf2_locexpr_baton
*baton
;
21430 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21431 sizeof (struct dwarf2_locexpr_baton
));
21432 baton
->per_cu
= cu
->per_cu
;
21433 gdb_assert (baton
->per_cu
);
21435 if (attr_form_is_block (attr
))
21437 /* Note that we're just copying the block's data pointer
21438 here, not the actual data. We're still pointing into the
21439 info_buffer for SYM's objfile; right now we never release
21440 that buffer, but when we do clean up properly this may
21442 baton
->size
= DW_BLOCK (attr
)->size
;
21443 baton
->data
= DW_BLOCK (attr
)->data
;
21447 dwarf2_invalid_attrib_class_complaint ("location description",
21448 SYMBOL_NATURAL_NAME (sym
));
21452 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21453 ? dwarf2_locexpr_block_index
21454 : dwarf2_locexpr_index
);
21455 SYMBOL_LOCATION_BATON (sym
) = baton
;
21459 /* Return the OBJFILE associated with the compilation unit CU. If CU
21460 came from a separate debuginfo file, then the master objfile is
21464 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21466 struct objfile
*objfile
= per_cu
->objfile
;
21468 /* Return the master objfile, so that we can report and look up the
21469 correct file containing this variable. */
21470 if (objfile
->separate_debug_objfile_backlink
)
21471 objfile
= objfile
->separate_debug_objfile_backlink
;
21476 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21477 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21478 CU_HEADERP first. */
21480 static const struct comp_unit_head
*
21481 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21482 struct dwarf2_per_cu_data
*per_cu
)
21484 const gdb_byte
*info_ptr
;
21487 return &per_cu
->cu
->header
;
21489 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21491 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21492 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21497 /* Return the address size given in the compilation unit header for CU. */
21500 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21502 struct comp_unit_head cu_header_local
;
21503 const struct comp_unit_head
*cu_headerp
;
21505 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21507 return cu_headerp
->addr_size
;
21510 /* Return the offset size given in the compilation unit header for CU. */
21513 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21515 struct comp_unit_head cu_header_local
;
21516 const struct comp_unit_head
*cu_headerp
;
21518 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21520 return cu_headerp
->offset_size
;
21523 /* See its dwarf2loc.h declaration. */
21526 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21528 struct comp_unit_head cu_header_local
;
21529 const struct comp_unit_head
*cu_headerp
;
21531 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21533 if (cu_headerp
->version
== 2)
21534 return cu_headerp
->addr_size
;
21536 return cu_headerp
->offset_size
;
21539 /* Return the text offset of the CU. The returned offset comes from
21540 this CU's objfile. If this objfile came from a separate debuginfo
21541 file, then the offset may be different from the corresponding
21542 offset in the parent objfile. */
21545 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21547 struct objfile
*objfile
= per_cu
->objfile
;
21549 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21552 /* Locate the .debug_info compilation unit from CU's objfile which contains
21553 the DIE at OFFSET. Raises an error on failure. */
21555 static struct dwarf2_per_cu_data
*
21556 dwarf2_find_containing_comp_unit (sect_offset offset
,
21557 unsigned int offset_in_dwz
,
21558 struct objfile
*objfile
)
21560 struct dwarf2_per_cu_data
*this_cu
;
21562 const sect_offset
*cu_off
;
21565 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21568 struct dwarf2_per_cu_data
*mid_cu
;
21569 int mid
= low
+ (high
- low
) / 2;
21571 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21572 cu_off
= &mid_cu
->offset
;
21573 if (mid_cu
->is_dwz
> offset_in_dwz
21574 || (mid_cu
->is_dwz
== offset_in_dwz
21575 && cu_off
->sect_off
>= offset
.sect_off
))
21580 gdb_assert (low
== high
);
21581 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21582 cu_off
= &this_cu
->offset
;
21583 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21585 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21586 error (_("Dwarf Error: could not find partial DIE containing "
21587 "offset 0x%lx [in module %s]"),
21588 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21590 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21591 <= offset
.sect_off
);
21592 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21596 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21597 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21598 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21599 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21600 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21605 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21608 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21610 memset (cu
, 0, sizeof (*cu
));
21612 cu
->per_cu
= per_cu
;
21613 cu
->objfile
= per_cu
->objfile
;
21614 obstack_init (&cu
->comp_unit_obstack
);
21617 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21620 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21621 enum language pretend_language
)
21623 struct attribute
*attr
;
21625 /* Set the language we're debugging. */
21626 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21628 set_cu_language (DW_UNSND (attr
), cu
);
21631 cu
->language
= pretend_language
;
21632 cu
->language_defn
= language_def (cu
->language
);
21635 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21637 cu
->producer
= DW_STRING (attr
);
21640 /* Release one cached compilation unit, CU. We unlink it from the tree
21641 of compilation units, but we don't remove it from the read_in_chain;
21642 the caller is responsible for that.
21643 NOTE: DATA is a void * because this function is also used as a
21644 cleanup routine. */
21647 free_heap_comp_unit (void *data
)
21649 struct dwarf2_cu
*cu
= data
;
21651 gdb_assert (cu
->per_cu
!= NULL
);
21652 cu
->per_cu
->cu
= NULL
;
21655 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21660 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21661 when we're finished with it. We can't free the pointer itself, but be
21662 sure to unlink it from the cache. Also release any associated storage. */
21665 free_stack_comp_unit (void *data
)
21667 struct dwarf2_cu
*cu
= data
;
21669 gdb_assert (cu
->per_cu
!= NULL
);
21670 cu
->per_cu
->cu
= NULL
;
21673 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21674 cu
->partial_dies
= NULL
;
21677 /* Free all cached compilation units. */
21680 free_cached_comp_units (void *data
)
21682 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21684 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21685 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21686 while (per_cu
!= NULL
)
21688 struct dwarf2_per_cu_data
*next_cu
;
21690 next_cu
= per_cu
->cu
->read_in_chain
;
21692 free_heap_comp_unit (per_cu
->cu
);
21693 *last_chain
= next_cu
;
21699 /* Increase the age counter on each cached compilation unit, and free
21700 any that are too old. */
21703 age_cached_comp_units (void)
21705 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21707 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21708 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21709 while (per_cu
!= NULL
)
21711 per_cu
->cu
->last_used
++;
21712 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21713 dwarf2_mark (per_cu
->cu
);
21714 per_cu
= per_cu
->cu
->read_in_chain
;
21717 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21718 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21719 while (per_cu
!= NULL
)
21721 struct dwarf2_per_cu_data
*next_cu
;
21723 next_cu
= per_cu
->cu
->read_in_chain
;
21725 if (!per_cu
->cu
->mark
)
21727 free_heap_comp_unit (per_cu
->cu
);
21728 *last_chain
= next_cu
;
21731 last_chain
= &per_cu
->cu
->read_in_chain
;
21737 /* Remove a single compilation unit from the cache. */
21740 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
21742 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21744 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21745 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21746 while (per_cu
!= NULL
)
21748 struct dwarf2_per_cu_data
*next_cu
;
21750 next_cu
= per_cu
->cu
->read_in_chain
;
21752 if (per_cu
== target_per_cu
)
21754 free_heap_comp_unit (per_cu
->cu
);
21756 *last_chain
= next_cu
;
21760 last_chain
= &per_cu
->cu
->read_in_chain
;
21766 /* Release all extra memory associated with OBJFILE. */
21769 dwarf2_free_objfile (struct objfile
*objfile
)
21771 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
21773 if (dwarf2_per_objfile
== NULL
)
21776 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21777 free_cached_comp_units (NULL
);
21779 if (dwarf2_per_objfile
->quick_file_names_table
)
21780 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
21782 /* Everything else should be on the objfile obstack. */
21785 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
21786 We store these in a hash table separate from the DIEs, and preserve them
21787 when the DIEs are flushed out of cache.
21789 The CU "per_cu" pointer is needed because offset alone is not enough to
21790 uniquely identify the type. A file may have multiple .debug_types sections,
21791 or the type may come from a DWO file. Furthermore, while it's more logical
21792 to use per_cu->section+offset, with Fission the section with the data is in
21793 the DWO file but we don't know that section at the point we need it.
21794 We have to use something in dwarf2_per_cu_data (or the pointer to it)
21795 because we can enter the lookup routine, get_die_type_at_offset, from
21796 outside this file, and thus won't necessarily have PER_CU->cu.
21797 Fortunately, PER_CU is stable for the life of the objfile. */
21799 struct dwarf2_per_cu_offset_and_type
21801 const struct dwarf2_per_cu_data
*per_cu
;
21802 sect_offset offset
;
21806 /* Hash function for a dwarf2_per_cu_offset_and_type. */
21809 per_cu_offset_and_type_hash (const void *item
)
21811 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
21813 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
21816 /* Equality function for a dwarf2_per_cu_offset_and_type. */
21819 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
21821 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
21822 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
21824 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
21825 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
21828 /* Set the type associated with DIE to TYPE. Save it in CU's hash
21829 table if necessary. For convenience, return TYPE.
21831 The DIEs reading must have careful ordering to:
21832 * Not cause infite loops trying to read in DIEs as a prerequisite for
21833 reading current DIE.
21834 * Not trying to dereference contents of still incompletely read in types
21835 while reading in other DIEs.
21836 * Enable referencing still incompletely read in types just by a pointer to
21837 the type without accessing its fields.
21839 Therefore caller should follow these rules:
21840 * Try to fetch any prerequisite types we may need to build this DIE type
21841 before building the type and calling set_die_type.
21842 * After building type call set_die_type for current DIE as soon as
21843 possible before fetching more types to complete the current type.
21844 * Make the type as complete as possible before fetching more types. */
21846 static struct type
*
21847 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
21849 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
21850 struct objfile
*objfile
= cu
->objfile
;
21851 struct attribute
*attr
;
21852 struct dynamic_prop prop
;
21854 /* For Ada types, make sure that the gnat-specific data is always
21855 initialized (if not already set). There are a few types where
21856 we should not be doing so, because the type-specific area is
21857 already used to hold some other piece of info (eg: TYPE_CODE_FLT
21858 where the type-specific area is used to store the floatformat).
21859 But this is not a problem, because the gnat-specific information
21860 is actually not needed for these types. */
21861 if (need_gnat_info (cu
)
21862 && TYPE_CODE (type
) != TYPE_CODE_FUNC
21863 && TYPE_CODE (type
) != TYPE_CODE_FLT
21864 && !HAVE_GNAT_AUX_INFO (type
))
21865 INIT_GNAT_SPECIFIC (type
);
21867 /* Read DW_AT_data_location and set in type. */
21868 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
21869 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
21871 TYPE_DATA_LOCATION (type
)
21872 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (prop
));
21873 *TYPE_DATA_LOCATION (type
) = prop
;
21876 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
21878 dwarf2_per_objfile
->die_type_hash
=
21879 htab_create_alloc_ex (127,
21880 per_cu_offset_and_type_hash
,
21881 per_cu_offset_and_type_eq
,
21883 &objfile
->objfile_obstack
,
21884 hashtab_obstack_allocate
,
21885 dummy_obstack_deallocate
);
21888 ofs
.per_cu
= cu
->per_cu
;
21889 ofs
.offset
= die
->offset
;
21891 slot
= (struct dwarf2_per_cu_offset_and_type
**)
21892 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
21894 complaint (&symfile_complaints
,
21895 _("A problem internal to GDB: DIE 0x%x has type already set"),
21896 die
->offset
.sect_off
);
21897 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
21902 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
21903 or return NULL if the die does not have a saved type. */
21905 static struct type
*
21906 get_die_type_at_offset (sect_offset offset
,
21907 struct dwarf2_per_cu_data
*per_cu
)
21909 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
21911 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
21914 ofs
.per_cu
= per_cu
;
21915 ofs
.offset
= offset
;
21916 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
21923 /* Look up the type for DIE in CU in die_type_hash,
21924 or return NULL if DIE does not have a saved type. */
21926 static struct type
*
21927 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21929 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
21932 /* Add a dependence relationship from CU to REF_PER_CU. */
21935 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
21936 struct dwarf2_per_cu_data
*ref_per_cu
)
21940 if (cu
->dependencies
== NULL
)
21942 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
21943 NULL
, &cu
->comp_unit_obstack
,
21944 hashtab_obstack_allocate
,
21945 dummy_obstack_deallocate
);
21947 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
21949 *slot
= ref_per_cu
;
21952 /* Subroutine of dwarf2_mark to pass to htab_traverse.
21953 Set the mark field in every compilation unit in the
21954 cache that we must keep because we are keeping CU. */
21957 dwarf2_mark_helper (void **slot
, void *data
)
21959 struct dwarf2_per_cu_data
*per_cu
;
21961 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
21963 /* cu->dependencies references may not yet have been ever read if QUIT aborts
21964 reading of the chain. As such dependencies remain valid it is not much
21965 useful to track and undo them during QUIT cleanups. */
21966 if (per_cu
->cu
== NULL
)
21969 if (per_cu
->cu
->mark
)
21971 per_cu
->cu
->mark
= 1;
21973 if (per_cu
->cu
->dependencies
!= NULL
)
21974 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
21979 /* Set the mark field in CU and in every other compilation unit in the
21980 cache that we must keep because we are keeping CU. */
21983 dwarf2_mark (struct dwarf2_cu
*cu
)
21988 if (cu
->dependencies
!= NULL
)
21989 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
21993 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
21997 per_cu
->cu
->mark
= 0;
21998 per_cu
= per_cu
->cu
->read_in_chain
;
22002 /* Trivial hash function for partial_die_info: the hash value of a DIE
22003 is its offset in .debug_info for this objfile. */
22006 partial_die_hash (const void *item
)
22008 const struct partial_die_info
*part_die
= item
;
22010 return part_die
->offset
.sect_off
;
22013 /* Trivial comparison function for partial_die_info structures: two DIEs
22014 are equal if they have the same offset. */
22017 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22019 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22020 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22022 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22025 static struct cmd_list_element
*set_dwarf2_cmdlist
;
22026 static struct cmd_list_element
*show_dwarf2_cmdlist
;
22029 set_dwarf2_cmd (char *args
, int from_tty
)
22031 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", all_commands
,
22036 show_dwarf2_cmd (char *args
, int from_tty
)
22038 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
22041 /* Free data associated with OBJFILE, if necessary. */
22044 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22046 struct dwarf2_per_objfile
*data
= d
;
22049 /* Make sure we don't accidentally use dwarf2_per_objfile while
22051 dwarf2_per_objfile
= NULL
;
22053 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22054 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22056 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22057 VEC_free (dwarf2_per_cu_ptr
,
22058 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22059 xfree (data
->all_type_units
);
22061 VEC_free (dwarf2_section_info_def
, data
->types
);
22063 if (data
->dwo_files
)
22064 free_dwo_files (data
->dwo_files
, objfile
);
22065 if (data
->dwp_file
)
22066 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22068 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22069 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22073 /* The "save gdb-index" command. */
22075 /* The contents of the hash table we create when building the string
22077 struct strtab_entry
22079 offset_type offset
;
22083 /* Hash function for a strtab_entry.
22085 Function is used only during write_hash_table so no index format backward
22086 compatibility is needed. */
22089 hash_strtab_entry (const void *e
)
22091 const struct strtab_entry
*entry
= e
;
22092 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22095 /* Equality function for a strtab_entry. */
22098 eq_strtab_entry (const void *a
, const void *b
)
22100 const struct strtab_entry
*ea
= a
;
22101 const struct strtab_entry
*eb
= b
;
22102 return !strcmp (ea
->str
, eb
->str
);
22105 /* Create a strtab_entry hash table. */
22108 create_strtab (void)
22110 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22111 xfree
, xcalloc
, xfree
);
22114 /* Add a string to the constant pool. Return the string's offset in
22118 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22121 struct strtab_entry entry
;
22122 struct strtab_entry
*result
;
22125 slot
= htab_find_slot (table
, &entry
, INSERT
);
22130 result
= XNEW (struct strtab_entry
);
22131 result
->offset
= obstack_object_size (cpool
);
22133 obstack_grow_str0 (cpool
, str
);
22136 return result
->offset
;
22139 /* An entry in the symbol table. */
22140 struct symtab_index_entry
22142 /* The name of the symbol. */
22144 /* The offset of the name in the constant pool. */
22145 offset_type index_offset
;
22146 /* A sorted vector of the indices of all the CUs that hold an object
22148 VEC (offset_type
) *cu_indices
;
22151 /* The symbol table. This is a power-of-2-sized hash table. */
22152 struct mapped_symtab
22154 offset_type n_elements
;
22156 struct symtab_index_entry
**data
;
22159 /* Hash function for a symtab_index_entry. */
22162 hash_symtab_entry (const void *e
)
22164 const struct symtab_index_entry
*entry
= e
;
22165 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22166 sizeof (offset_type
) * VEC_length (offset_type
,
22167 entry
->cu_indices
),
22171 /* Equality function for a symtab_index_entry. */
22174 eq_symtab_entry (const void *a
, const void *b
)
22176 const struct symtab_index_entry
*ea
= a
;
22177 const struct symtab_index_entry
*eb
= b
;
22178 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22179 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22181 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22182 VEC_address (offset_type
, eb
->cu_indices
),
22183 sizeof (offset_type
) * len
);
22186 /* Destroy a symtab_index_entry. */
22189 delete_symtab_entry (void *p
)
22191 struct symtab_index_entry
*entry
= p
;
22192 VEC_free (offset_type
, entry
->cu_indices
);
22196 /* Create a hash table holding symtab_index_entry objects. */
22199 create_symbol_hash_table (void)
22201 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22202 delete_symtab_entry
, xcalloc
, xfree
);
22205 /* Create a new mapped symtab object. */
22207 static struct mapped_symtab
*
22208 create_mapped_symtab (void)
22210 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22211 symtab
->n_elements
= 0;
22212 symtab
->size
= 1024;
22213 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22217 /* Destroy a mapped_symtab. */
22220 cleanup_mapped_symtab (void *p
)
22222 struct mapped_symtab
*symtab
= p
;
22223 /* The contents of the array are freed when the other hash table is
22225 xfree (symtab
->data
);
22229 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22232 Function is used only during write_hash_table so no index format backward
22233 compatibility is needed. */
22235 static struct symtab_index_entry
**
22236 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22238 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22240 index
= hash
& (symtab
->size
- 1);
22241 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22245 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22246 return &symtab
->data
[index
];
22247 index
= (index
+ step
) & (symtab
->size
- 1);
22251 /* Expand SYMTAB's hash table. */
22254 hash_expand (struct mapped_symtab
*symtab
)
22256 offset_type old_size
= symtab
->size
;
22258 struct symtab_index_entry
**old_entries
= symtab
->data
;
22261 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22263 for (i
= 0; i
< old_size
; ++i
)
22265 if (old_entries
[i
])
22267 struct symtab_index_entry
**slot
= find_slot (symtab
,
22268 old_entries
[i
]->name
);
22269 *slot
= old_entries
[i
];
22273 xfree (old_entries
);
22276 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22277 CU_INDEX is the index of the CU in which the symbol appears.
22278 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22281 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22282 int is_static
, gdb_index_symbol_kind kind
,
22283 offset_type cu_index
)
22285 struct symtab_index_entry
**slot
;
22286 offset_type cu_index_and_attrs
;
22288 ++symtab
->n_elements
;
22289 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22290 hash_expand (symtab
);
22292 slot
= find_slot (symtab
, name
);
22295 *slot
= XNEW (struct symtab_index_entry
);
22296 (*slot
)->name
= name
;
22297 /* index_offset is set later. */
22298 (*slot
)->cu_indices
= NULL
;
22301 cu_index_and_attrs
= 0;
22302 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22303 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22304 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22306 /* We don't want to record an index value twice as we want to avoid the
22308 We process all global symbols and then all static symbols
22309 (which would allow us to avoid the duplication by only having to check
22310 the last entry pushed), but a symbol could have multiple kinds in one CU.
22311 To keep things simple we don't worry about the duplication here and
22312 sort and uniqufy the list after we've processed all symbols. */
22313 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22316 /* qsort helper routine for uniquify_cu_indices. */
22319 offset_type_compare (const void *ap
, const void *bp
)
22321 offset_type a
= *(offset_type
*) ap
;
22322 offset_type b
= *(offset_type
*) bp
;
22324 return (a
> b
) - (b
> a
);
22327 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22330 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22334 for (i
= 0; i
< symtab
->size
; ++i
)
22336 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22339 && entry
->cu_indices
!= NULL
)
22341 unsigned int next_to_insert
, next_to_check
;
22342 offset_type last_value
;
22344 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22345 VEC_length (offset_type
, entry
->cu_indices
),
22346 sizeof (offset_type
), offset_type_compare
);
22348 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22349 next_to_insert
= 1;
22350 for (next_to_check
= 1;
22351 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22354 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22357 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22359 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22364 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22369 /* Add a vector of indices to the constant pool. */
22372 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22373 struct symtab_index_entry
*entry
)
22377 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22380 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22381 offset_type val
= MAYBE_SWAP (len
);
22386 entry
->index_offset
= obstack_object_size (cpool
);
22388 obstack_grow (cpool
, &val
, sizeof (val
));
22390 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22393 val
= MAYBE_SWAP (iter
);
22394 obstack_grow (cpool
, &val
, sizeof (val
));
22399 struct symtab_index_entry
*old_entry
= *slot
;
22400 entry
->index_offset
= old_entry
->index_offset
;
22403 return entry
->index_offset
;
22406 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22407 constant pool entries going into the obstack CPOOL. */
22410 write_hash_table (struct mapped_symtab
*symtab
,
22411 struct obstack
*output
, struct obstack
*cpool
)
22414 htab_t symbol_hash_table
;
22417 symbol_hash_table
= create_symbol_hash_table ();
22418 str_table
= create_strtab ();
22420 /* We add all the index vectors to the constant pool first, to
22421 ensure alignment is ok. */
22422 for (i
= 0; i
< symtab
->size
; ++i
)
22424 if (symtab
->data
[i
])
22425 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22428 /* Now write out the hash table. */
22429 for (i
= 0; i
< symtab
->size
; ++i
)
22431 offset_type str_off
, vec_off
;
22433 if (symtab
->data
[i
])
22435 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22436 vec_off
= symtab
->data
[i
]->index_offset
;
22440 /* While 0 is a valid constant pool index, it is not valid
22441 to have 0 for both offsets. */
22446 str_off
= MAYBE_SWAP (str_off
);
22447 vec_off
= MAYBE_SWAP (vec_off
);
22449 obstack_grow (output
, &str_off
, sizeof (str_off
));
22450 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22453 htab_delete (str_table
);
22454 htab_delete (symbol_hash_table
);
22457 /* Struct to map psymtab to CU index in the index file. */
22458 struct psymtab_cu_index_map
22460 struct partial_symtab
*psymtab
;
22461 unsigned int cu_index
;
22465 hash_psymtab_cu_index (const void *item
)
22467 const struct psymtab_cu_index_map
*map
= item
;
22469 return htab_hash_pointer (map
->psymtab
);
22473 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22475 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22476 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22478 return lhs
->psymtab
== rhs
->psymtab
;
22481 /* Helper struct for building the address table. */
22482 struct addrmap_index_data
22484 struct objfile
*objfile
;
22485 struct obstack
*addr_obstack
;
22486 htab_t cu_index_htab
;
22488 /* Non-zero if the previous_* fields are valid.
22489 We can't write an entry until we see the next entry (since it is only then
22490 that we know the end of the entry). */
22491 int previous_valid
;
22492 /* Index of the CU in the table of all CUs in the index file. */
22493 unsigned int previous_cu_index
;
22494 /* Start address of the CU. */
22495 CORE_ADDR previous_cu_start
;
22498 /* Write an address entry to OBSTACK. */
22501 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22502 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22504 offset_type cu_index_to_write
;
22506 CORE_ADDR baseaddr
;
22508 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22510 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22511 obstack_grow (obstack
, addr
, 8);
22512 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22513 obstack_grow (obstack
, addr
, 8);
22514 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22515 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22518 /* Worker function for traversing an addrmap to build the address table. */
22521 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22523 struct addrmap_index_data
*data
= datap
;
22524 struct partial_symtab
*pst
= obj
;
22526 if (data
->previous_valid
)
22527 add_address_entry (data
->objfile
, data
->addr_obstack
,
22528 data
->previous_cu_start
, start_addr
,
22529 data
->previous_cu_index
);
22531 data
->previous_cu_start
= start_addr
;
22534 struct psymtab_cu_index_map find_map
, *map
;
22535 find_map
.psymtab
= pst
;
22536 map
= htab_find (data
->cu_index_htab
, &find_map
);
22537 gdb_assert (map
!= NULL
);
22538 data
->previous_cu_index
= map
->cu_index
;
22539 data
->previous_valid
= 1;
22542 data
->previous_valid
= 0;
22547 /* Write OBJFILE's address map to OBSTACK.
22548 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22549 in the index file. */
22552 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22553 htab_t cu_index_htab
)
22555 struct addrmap_index_data addrmap_index_data
;
22557 /* When writing the address table, we have to cope with the fact that
22558 the addrmap iterator only provides the start of a region; we have to
22559 wait until the next invocation to get the start of the next region. */
22561 addrmap_index_data
.objfile
= objfile
;
22562 addrmap_index_data
.addr_obstack
= obstack
;
22563 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22564 addrmap_index_data
.previous_valid
= 0;
22566 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22567 &addrmap_index_data
);
22569 /* It's highly unlikely the last entry (end address = 0xff...ff)
22570 is valid, but we should still handle it.
22571 The end address is recorded as the start of the next region, but that
22572 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22574 if (addrmap_index_data
.previous_valid
)
22575 add_address_entry (objfile
, obstack
,
22576 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22577 addrmap_index_data
.previous_cu_index
);
22580 /* Return the symbol kind of PSYM. */
22582 static gdb_index_symbol_kind
22583 symbol_kind (struct partial_symbol
*psym
)
22585 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22586 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22594 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22596 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22598 case LOC_CONST_BYTES
:
22599 case LOC_OPTIMIZED_OUT
:
22601 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22603 /* Note: It's currently impossible to recognize psyms as enum values
22604 short of reading the type info. For now punt. */
22605 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22607 /* There are other LOC_FOO values that one might want to classify
22608 as variables, but dwarf2read.c doesn't currently use them. */
22609 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22611 case STRUCT_DOMAIN
:
22612 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22614 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22618 /* Add a list of partial symbols to SYMTAB. */
22621 write_psymbols (struct mapped_symtab
*symtab
,
22623 struct partial_symbol
**psymp
,
22625 offset_type cu_index
,
22628 for (; count
-- > 0; ++psymp
)
22630 struct partial_symbol
*psym
= *psymp
;
22633 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22634 error (_("Ada is not currently supported by the index"));
22636 /* Only add a given psymbol once. */
22637 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22640 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22643 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22644 is_static
, kind
, cu_index
);
22649 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22650 exception if there is an error. */
22653 write_obstack (FILE *file
, struct obstack
*obstack
)
22655 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22657 != obstack_object_size (obstack
))
22658 error (_("couldn't data write to file"));
22661 /* Unlink a file if the argument is not NULL. */
22664 unlink_if_set (void *p
)
22666 char **filename
= p
;
22668 unlink (*filename
);
22671 /* A helper struct used when iterating over debug_types. */
22672 struct signatured_type_index_data
22674 struct objfile
*objfile
;
22675 struct mapped_symtab
*symtab
;
22676 struct obstack
*types_list
;
22681 /* A helper function that writes a single signatured_type to an
22685 write_one_signatured_type (void **slot
, void *d
)
22687 struct signatured_type_index_data
*info
= d
;
22688 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22689 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22692 write_psymbols (info
->symtab
,
22694 info
->objfile
->global_psymbols
.list
22695 + psymtab
->globals_offset
,
22696 psymtab
->n_global_syms
, info
->cu_index
,
22698 write_psymbols (info
->symtab
,
22700 info
->objfile
->static_psymbols
.list
22701 + psymtab
->statics_offset
,
22702 psymtab
->n_static_syms
, info
->cu_index
,
22705 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22706 entry
->per_cu
.offset
.sect_off
);
22707 obstack_grow (info
->types_list
, val
, 8);
22708 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22709 entry
->type_offset_in_tu
.cu_off
);
22710 obstack_grow (info
->types_list
, val
, 8);
22711 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22712 obstack_grow (info
->types_list
, val
, 8);
22719 /* Recurse into all "included" dependencies and write their symbols as
22720 if they appeared in this psymtab. */
22723 recursively_write_psymbols (struct objfile
*objfile
,
22724 struct partial_symtab
*psymtab
,
22725 struct mapped_symtab
*symtab
,
22727 offset_type cu_index
)
22731 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22732 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22733 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22734 symtab
, psyms_seen
, cu_index
);
22736 write_psymbols (symtab
,
22738 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22739 psymtab
->n_global_syms
, cu_index
,
22741 write_psymbols (symtab
,
22743 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
22744 psymtab
->n_static_syms
, cu_index
,
22748 /* Create an index file for OBJFILE in the directory DIR. */
22751 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
22753 struct cleanup
*cleanup
;
22754 char *filename
, *cleanup_filename
;
22755 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
22756 struct obstack cu_list
, types_cu_list
;
22759 struct mapped_symtab
*symtab
;
22760 offset_type val
, size_of_contents
, total_len
;
22763 htab_t cu_index_htab
;
22764 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
22766 if (dwarf2_per_objfile
->using_index
)
22767 error (_("Cannot use an index to create the index"));
22769 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
22770 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22772 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
22775 if (stat (objfile_name (objfile
), &st
) < 0)
22776 perror_with_name (objfile_name (objfile
));
22778 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
22779 INDEX_SUFFIX
, (char *) NULL
);
22780 cleanup
= make_cleanup (xfree
, filename
);
22782 out_file
= gdb_fopen_cloexec (filename
, "wb");
22784 error (_("Can't open `%s' for writing"), filename
);
22786 cleanup_filename
= filename
;
22787 make_cleanup (unlink_if_set
, &cleanup_filename
);
22789 symtab
= create_mapped_symtab ();
22790 make_cleanup (cleanup_mapped_symtab
, symtab
);
22792 obstack_init (&addr_obstack
);
22793 make_cleanup_obstack_free (&addr_obstack
);
22795 obstack_init (&cu_list
);
22796 make_cleanup_obstack_free (&cu_list
);
22798 obstack_init (&types_cu_list
);
22799 make_cleanup_obstack_free (&types_cu_list
);
22801 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
22802 NULL
, xcalloc
, xfree
);
22803 make_cleanup_htab_delete (psyms_seen
);
22805 /* While we're scanning CU's create a table that maps a psymtab pointer
22806 (which is what addrmap records) to its index (which is what is recorded
22807 in the index file). This will later be needed to write the address
22809 cu_index_htab
= htab_create_alloc (100,
22810 hash_psymtab_cu_index
,
22811 eq_psymtab_cu_index
,
22812 NULL
, xcalloc
, xfree
);
22813 make_cleanup_htab_delete (cu_index_htab
);
22814 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
22815 xmalloc (sizeof (struct psymtab_cu_index_map
)
22816 * dwarf2_per_objfile
->n_comp_units
);
22817 make_cleanup (xfree
, psymtab_cu_index_map
);
22819 /* The CU list is already sorted, so we don't need to do additional
22820 work here. Also, the debug_types entries do not appear in
22821 all_comp_units, but only in their own hash table. */
22822 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
22824 struct dwarf2_per_cu_data
*per_cu
22825 = dwarf2_per_objfile
->all_comp_units
[i
];
22826 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
22828 struct psymtab_cu_index_map
*map
;
22831 /* CU of a shared file from 'dwz -m' may be unused by this main file.
22832 It may be referenced from a local scope but in such case it does not
22833 need to be present in .gdb_index. */
22834 if (psymtab
== NULL
)
22837 if (psymtab
->user
== NULL
)
22838 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
22840 map
= &psymtab_cu_index_map
[i
];
22841 map
->psymtab
= psymtab
;
22843 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
22844 gdb_assert (slot
!= NULL
);
22845 gdb_assert (*slot
== NULL
);
22848 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22849 per_cu
->offset
.sect_off
);
22850 obstack_grow (&cu_list
, val
, 8);
22851 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
22852 obstack_grow (&cu_list
, val
, 8);
22855 /* Dump the address map. */
22856 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
22858 /* Write out the .debug_type entries, if any. */
22859 if (dwarf2_per_objfile
->signatured_types
)
22861 struct signatured_type_index_data sig_data
;
22863 sig_data
.objfile
= objfile
;
22864 sig_data
.symtab
= symtab
;
22865 sig_data
.types_list
= &types_cu_list
;
22866 sig_data
.psyms_seen
= psyms_seen
;
22867 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
22868 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
22869 write_one_signatured_type
, &sig_data
);
22872 /* Now that we've processed all symbols we can shrink their cu_indices
22874 uniquify_cu_indices (symtab
);
22876 obstack_init (&constant_pool
);
22877 make_cleanup_obstack_free (&constant_pool
);
22878 obstack_init (&symtab_obstack
);
22879 make_cleanup_obstack_free (&symtab_obstack
);
22880 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
22882 obstack_init (&contents
);
22883 make_cleanup_obstack_free (&contents
);
22884 size_of_contents
= 6 * sizeof (offset_type
);
22885 total_len
= size_of_contents
;
22887 /* The version number. */
22888 val
= MAYBE_SWAP (8);
22889 obstack_grow (&contents
, &val
, sizeof (val
));
22891 /* The offset of the CU list from the start of the file. */
22892 val
= MAYBE_SWAP (total_len
);
22893 obstack_grow (&contents
, &val
, sizeof (val
));
22894 total_len
+= obstack_object_size (&cu_list
);
22896 /* The offset of the types CU list from the start of the file. */
22897 val
= MAYBE_SWAP (total_len
);
22898 obstack_grow (&contents
, &val
, sizeof (val
));
22899 total_len
+= obstack_object_size (&types_cu_list
);
22901 /* The offset of the address table from the start of the file. */
22902 val
= MAYBE_SWAP (total_len
);
22903 obstack_grow (&contents
, &val
, sizeof (val
));
22904 total_len
+= obstack_object_size (&addr_obstack
);
22906 /* The offset of the symbol table from the start of the file. */
22907 val
= MAYBE_SWAP (total_len
);
22908 obstack_grow (&contents
, &val
, sizeof (val
));
22909 total_len
+= obstack_object_size (&symtab_obstack
);
22911 /* The offset of the constant pool from the start of the file. */
22912 val
= MAYBE_SWAP (total_len
);
22913 obstack_grow (&contents
, &val
, sizeof (val
));
22914 total_len
+= obstack_object_size (&constant_pool
);
22916 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
22918 write_obstack (out_file
, &contents
);
22919 write_obstack (out_file
, &cu_list
);
22920 write_obstack (out_file
, &types_cu_list
);
22921 write_obstack (out_file
, &addr_obstack
);
22922 write_obstack (out_file
, &symtab_obstack
);
22923 write_obstack (out_file
, &constant_pool
);
22927 /* We want to keep the file, so we set cleanup_filename to NULL
22928 here. See unlink_if_set. */
22929 cleanup_filename
= NULL
;
22931 do_cleanups (cleanup
);
22934 /* Implementation of the `save gdb-index' command.
22936 Note that the file format used by this command is documented in the
22937 GDB manual. Any changes here must be documented there. */
22940 save_gdb_index_command (char *arg
, int from_tty
)
22942 struct objfile
*objfile
;
22945 error (_("usage: save gdb-index DIRECTORY"));
22947 ALL_OBJFILES (objfile
)
22951 /* If the objfile does not correspond to an actual file, skip it. */
22952 if (stat (objfile_name (objfile
), &st
) < 0)
22955 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22956 if (dwarf2_per_objfile
)
22958 volatile struct gdb_exception except
;
22960 TRY_CATCH (except
, RETURN_MASK_ERROR
)
22962 write_psymtabs_to_index (objfile
, arg
);
22964 if (except
.reason
< 0)
22965 exception_fprintf (gdb_stderr
, except
,
22966 _("Error while writing index for `%s': "),
22967 objfile_name (objfile
));
22974 int dwarf2_always_disassemble
;
22977 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
22978 struct cmd_list_element
*c
, const char *value
)
22980 fprintf_filtered (file
,
22981 _("Whether to always disassemble "
22982 "DWARF expressions is %s.\n"),
22987 show_check_physname (struct ui_file
*file
, int from_tty
,
22988 struct cmd_list_element
*c
, const char *value
)
22990 fprintf_filtered (file
,
22991 _("Whether to check \"physname\" is %s.\n"),
22995 void _initialize_dwarf2_read (void);
22998 _initialize_dwarf2_read (void)
23000 struct cmd_list_element
*c
;
23002 dwarf2_objfile_data_key
23003 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23005 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
23006 Set DWARF 2 specific variables.\n\
23007 Configure DWARF 2 variables such as the cache size"),
23008 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
23009 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23011 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
23012 Show DWARF 2 specific variables\n\
23013 Show DWARF 2 variables such as the cache size"),
23014 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
23015 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23017 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23018 &dwarf2_max_cache_age
, _("\
23019 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
23020 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
23021 A higher limit means that cached compilation units will be stored\n\
23022 in memory longer, and more total memory will be used. Zero disables\n\
23023 caching, which can slow down startup."),
23025 show_dwarf2_max_cache_age
,
23026 &set_dwarf2_cmdlist
,
23027 &show_dwarf2_cmdlist
);
23029 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23030 &dwarf2_always_disassemble
, _("\
23031 Set whether `info address' always disassembles DWARF expressions."), _("\
23032 Show whether `info address' always disassembles DWARF expressions."), _("\
23033 When enabled, DWARF expressions are always printed in an assembly-like\n\
23034 syntax. When disabled, expressions will be printed in a more\n\
23035 conversational style, when possible."),
23037 show_dwarf2_always_disassemble
,
23038 &set_dwarf2_cmdlist
,
23039 &show_dwarf2_cmdlist
);
23041 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
23042 Set debugging of the dwarf2 reader."), _("\
23043 Show debugging of the dwarf2 reader."), _("\
23044 When enabled (non-zero), debugging messages are printed during dwarf2\n\
23045 reading and symtab expansion. A value of 1 (one) provides basic\n\
23046 information. A value greater than 1 provides more verbose information."),
23049 &setdebuglist
, &showdebuglist
);
23051 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
23052 Set debugging of the dwarf2 DIE reader."), _("\
23053 Show debugging of the dwarf2 DIE reader."), _("\
23054 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23055 The value is the maximum depth to print."),
23058 &setdebuglist
, &showdebuglist
);
23060 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23061 Set cross-checking of \"physname\" code against demangler."), _("\
23062 Show cross-checking of \"physname\" code against demangler."), _("\
23063 When enabled, GDB's internal \"physname\" code is checked against\n\
23065 NULL
, show_check_physname
,
23066 &setdebuglist
, &showdebuglist
);
23068 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23069 no_class
, &use_deprecated_index_sections
, _("\
23070 Set whether to use deprecated gdb_index sections."), _("\
23071 Show whether to use deprecated gdb_index sections."), _("\
23072 When enabled, deprecated .gdb_index sections are used anyway.\n\
23073 Normally they are ignored either because of a missing feature or\n\
23074 performance issue.\n\
23075 Warning: This option must be enabled before gdb reads the file."),
23078 &setlist
, &showlist
);
23080 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23082 Save a gdb-index file.\n\
23083 Usage: save gdb-index DIRECTORY"),
23085 set_cmd_completer (c
, filename_completer
);
23087 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23088 &dwarf2_locexpr_funcs
);
23089 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23090 &dwarf2_loclist_funcs
);
23092 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23093 &dwarf2_block_frame_base_locexpr_funcs
);
23094 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23095 &dwarf2_block_frame_base_loclist_funcs
);