1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2018 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. */
32 #include "dwarf2read.h"
33 #include "dwarf-index-common.h"
42 #include "gdb-demangle.h"
43 #include "expression.h"
44 #include "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
73 #include "namespace.h"
74 #include "common/gdb_unlinker.h"
75 #include "common/function-view.h"
76 #include "common/gdb_optional.h"
77 #include "common/underlying.h"
78 #include "common/byte-vector.h"
79 #include "common/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "common/pathstuff.h"
94 /* When == 1, print basic high level tracing messages.
95 When > 1, be more verbose.
96 This is in contrast to the low level DIE reading of dwarf_die_debug. */
97 static unsigned int dwarf_read_debug
= 0;
99 /* When non-zero, dump DIEs after they are read in. */
100 static unsigned int dwarf_die_debug
= 0;
102 /* When non-zero, dump line number entries as they are read in. */
103 static unsigned int dwarf_line_debug
= 0;
105 /* When non-zero, cross-check physname against demangler. */
106 static int check_physname
= 0;
108 /* When non-zero, do not reject deprecated .gdb_index sections. */
109 static int use_deprecated_index_sections
= 0;
111 static const struct objfile_data
*dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 /* The name_component table (a sorted vector). See name_component's
151 description above. */
152 std::vector
<name_component
> name_components
;
154 /* How NAME_COMPONENTS is sorted. */
155 enum case_sensitivity name_components_casing
;
157 /* Return the number of names in the symbol table. */
158 virtual size_t symbol_name_count () const = 0;
160 /* Get the name of the symbol at IDX in the symbol table. */
161 virtual const char *symbol_name_at (offset_type idx
) const = 0;
163 /* Return whether the name at IDX in the symbol table should be
165 virtual bool symbol_name_slot_invalid (offset_type idx
) const
170 /* Build the symbol name component sorted vector, if we haven't
172 void build_name_components ();
174 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
175 possible matches for LN_NO_PARAMS in the name component
177 std::pair
<std::vector
<name_component
>::const_iterator
,
178 std::vector
<name_component
>::const_iterator
>
179 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
181 /* Prevent deleting/destroying via a base class pointer. */
183 ~mapped_index_base() = default;
186 /* A description of the mapped index. The file format is described in
187 a comment by the code that writes the index. */
188 struct mapped_index final
: public mapped_index_base
190 /* A slot/bucket in the symbol table hash. */
191 struct symbol_table_slot
193 const offset_type name
;
194 const offset_type vec
;
197 /* Index data format version. */
200 /* The total length of the buffer. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
;
218 /* Convenience method to get at the name of the symbol at IDX in the
220 const char *symbol_name_at (offset_type idx
) const override
221 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
223 size_t symbol_name_count () const override
224 { return this->symbol_table
.size (); }
227 /* A description of the mapped .debug_names.
228 Uninitialized map has CU_COUNT 0. */
229 struct mapped_debug_names final
: public mapped_index_base
231 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
232 : dwarf2_per_objfile (dwarf2_per_objfile_
)
235 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
236 bfd_endian dwarf5_byte_order
;
237 bool dwarf5_is_dwarf64
;
238 bool augmentation_is_gdb
;
240 uint32_t cu_count
= 0;
241 uint32_t tu_count
, bucket_count
, name_count
;
242 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
243 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
244 const gdb_byte
*name_table_string_offs_reordered
;
245 const gdb_byte
*name_table_entry_offs_reordered
;
246 const gdb_byte
*entry_pool
;
253 /* Attribute name DW_IDX_*. */
256 /* Attribute form DW_FORM_*. */
259 /* Value if FORM is DW_FORM_implicit_const. */
260 LONGEST implicit_const
;
262 std::vector
<attr
> attr_vec
;
265 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
267 const char *namei_to_name (uint32_t namei
) const;
269 /* Implementation of the mapped_index_base virtual interface, for
270 the name_components cache. */
272 const char *symbol_name_at (offset_type idx
) const override
273 { return namei_to_name (idx
); }
275 size_t symbol_name_count () const override
276 { return this->name_count
; }
279 /* See dwarf2read.h. */
282 get_dwarf2_per_objfile (struct objfile
*objfile
)
284 return ((struct dwarf2_per_objfile
*)
285 objfile_data (objfile
, dwarf2_objfile_data_key
));
288 /* Set the dwarf2_per_objfile associated to OBJFILE. */
291 set_dwarf2_per_objfile (struct objfile
*objfile
,
292 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
294 gdb_assert (get_dwarf2_per_objfile (objfile
) == NULL
);
295 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
298 /* Default names of the debugging sections. */
300 /* Note that if the debugging section has been compressed, it might
301 have a name like .zdebug_info. */
303 static const struct dwarf2_debug_sections dwarf2_elf_names
=
305 { ".debug_info", ".zdebug_info" },
306 { ".debug_abbrev", ".zdebug_abbrev" },
307 { ".debug_line", ".zdebug_line" },
308 { ".debug_loc", ".zdebug_loc" },
309 { ".debug_loclists", ".zdebug_loclists" },
310 { ".debug_macinfo", ".zdebug_macinfo" },
311 { ".debug_macro", ".zdebug_macro" },
312 { ".debug_str", ".zdebug_str" },
313 { ".debug_line_str", ".zdebug_line_str" },
314 { ".debug_ranges", ".zdebug_ranges" },
315 { ".debug_rnglists", ".zdebug_rnglists" },
316 { ".debug_types", ".zdebug_types" },
317 { ".debug_addr", ".zdebug_addr" },
318 { ".debug_frame", ".zdebug_frame" },
319 { ".eh_frame", NULL
},
320 { ".gdb_index", ".zgdb_index" },
321 { ".debug_names", ".zdebug_names" },
322 { ".debug_aranges", ".zdebug_aranges" },
326 /* List of DWO/DWP sections. */
328 static const struct dwop_section_names
330 struct dwarf2_section_names abbrev_dwo
;
331 struct dwarf2_section_names info_dwo
;
332 struct dwarf2_section_names line_dwo
;
333 struct dwarf2_section_names loc_dwo
;
334 struct dwarf2_section_names loclists_dwo
;
335 struct dwarf2_section_names macinfo_dwo
;
336 struct dwarf2_section_names macro_dwo
;
337 struct dwarf2_section_names str_dwo
;
338 struct dwarf2_section_names str_offsets_dwo
;
339 struct dwarf2_section_names types_dwo
;
340 struct dwarf2_section_names cu_index
;
341 struct dwarf2_section_names tu_index
;
345 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
346 { ".debug_info.dwo", ".zdebug_info.dwo" },
347 { ".debug_line.dwo", ".zdebug_line.dwo" },
348 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
349 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
350 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
351 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
352 { ".debug_str.dwo", ".zdebug_str.dwo" },
353 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
354 { ".debug_types.dwo", ".zdebug_types.dwo" },
355 { ".debug_cu_index", ".zdebug_cu_index" },
356 { ".debug_tu_index", ".zdebug_tu_index" },
359 /* local data types */
361 /* The data in a compilation unit header, after target2host
362 translation, looks like this. */
363 struct comp_unit_head
367 unsigned char addr_size
;
368 unsigned char signed_addr_p
;
369 sect_offset abbrev_sect_off
;
371 /* Size of file offsets; either 4 or 8. */
372 unsigned int offset_size
;
374 /* Size of the length field; either 4 or 12. */
375 unsigned int initial_length_size
;
377 enum dwarf_unit_type unit_type
;
379 /* Offset to the first byte of this compilation unit header in the
380 .debug_info section, for resolving relative reference dies. */
381 sect_offset sect_off
;
383 /* Offset to first die in this cu from the start of the cu.
384 This will be the first byte following the compilation unit header. */
385 cu_offset first_die_cu_offset
;
387 /* 64-bit signature of this type unit - it is valid only for
388 UNIT_TYPE DW_UT_type. */
391 /* For types, offset in the type's DIE of the type defined by this TU. */
392 cu_offset type_cu_offset_in_tu
;
395 /* Type used for delaying computation of method physnames.
396 See comments for compute_delayed_physnames. */
397 struct delayed_method_info
399 /* The type to which the method is attached, i.e., its parent class. */
402 /* The index of the method in the type's function fieldlists. */
405 /* The index of the method in the fieldlist. */
408 /* The name of the DIE. */
411 /* The DIE associated with this method. */
412 struct die_info
*die
;
415 /* Internal state when decoding a particular compilation unit. */
418 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
421 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
= 0;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
= language_unknown
;
434 const struct language_defn
*language_defn
= nullptr;
436 const char *producer
= nullptr;
438 /* The generic symbol table building routines have separate lists for
439 file scope symbols and all all other scopes (local scopes). So
440 we need to select the right one to pass to add_symbol_to_list().
441 We do it by keeping a pointer to the correct list in list_in_scope.
443 FIXME: The original dwarf code just treated the file scope as the
444 first local scope, and all other local scopes as nested local
445 scopes, and worked fine. Check to see if we really need to
446 distinguish these in buildsym.c. */
447 struct pending
**list_in_scope
= nullptr;
449 /* Hash table holding all the loaded partial DIEs
450 with partial_die->offset.SECT_OFF as hash. */
451 htab_t partial_dies
= nullptr;
453 /* Storage for things with the same lifetime as this read-in compilation
454 unit, including partial DIEs. */
455 auto_obstack comp_unit_obstack
;
457 /* When multiple dwarf2_cu structures are living in memory, this field
458 chains them all together, so that they can be released efficiently.
459 We will probably also want a generation counter so that most-recently-used
460 compilation units are cached... */
461 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
463 /* Backlink to our per_cu entry. */
464 struct dwarf2_per_cu_data
*per_cu
;
466 /* How many compilation units ago was this CU last referenced? */
469 /* A hash table of DIE cu_offset for following references with
470 die_info->offset.sect_off as hash. */
471 htab_t die_hash
= nullptr;
473 /* Full DIEs if read in. */
474 struct die_info
*dies
= nullptr;
476 /* A set of pointers to dwarf2_per_cu_data objects for compilation
477 units referenced by this one. Only set during full symbol processing;
478 partial symbol tables do not have dependencies. */
479 htab_t dependencies
= nullptr;
481 /* Header data from the line table, during full symbol processing. */
482 struct line_header
*line_header
= nullptr;
483 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
484 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
485 this is the DW_TAG_compile_unit die for this CU. We'll hold on
486 to the line header as long as this DIE is being processed. See
487 process_die_scope. */
488 die_info
*line_header_die_owner
= nullptr;
490 /* A list of methods which need to have physnames computed
491 after all type information has been read. */
492 std::vector
<delayed_method_info
> method_list
;
494 /* To be copied to symtab->call_site_htab. */
495 htab_t call_site_htab
= nullptr;
497 /* Non-NULL if this CU came from a DWO file.
498 There is an invariant here that is important to remember:
499 Except for attributes copied from the top level DIE in the "main"
500 (or "stub") file in preparation for reading the DWO file
501 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
502 Either there isn't a DWO file (in which case this is NULL and the point
503 is moot), or there is and either we're not going to read it (in which
504 case this is NULL) or there is and we are reading it (in which case this
506 struct dwo_unit
*dwo_unit
= nullptr;
508 /* The DW_AT_addr_base attribute if present, zero otherwise
509 (zero is a valid value though).
510 Note this value comes from the Fission stub CU/TU's DIE. */
511 ULONGEST addr_base
= 0;
513 /* The DW_AT_ranges_base attribute if present, zero otherwise
514 (zero is a valid value though).
515 Note this value comes from the Fission stub CU/TU's DIE.
516 Also note that the value is zero in the non-DWO case so this value can
517 be used without needing to know whether DWO files are in use or not.
518 N.B. This does not apply to DW_AT_ranges appearing in
519 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
520 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
521 DW_AT_ranges_base *would* have to be applied, and we'd have to care
522 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
523 ULONGEST ranges_base
= 0;
525 /* When reading debug info generated by older versions of rustc, we
526 have to rewrite some union types to be struct types with a
527 variant part. This rewriting must be done after the CU is fully
528 read in, because otherwise at the point of rewriting some struct
529 type might not have been fully processed. So, we keep a list of
530 all such types here and process them after expansion. */
531 std::vector
<struct type
*> rust_unions
;
533 /* Mark used when releasing cached dies. */
534 unsigned int mark
: 1;
536 /* This CU references .debug_loc. See the symtab->locations_valid field.
537 This test is imperfect as there may exist optimized debug code not using
538 any location list and still facing inlining issues if handled as
539 unoptimized code. For a future better test see GCC PR other/32998. */
540 unsigned int has_loclist
: 1;
542 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
543 if all the producer_is_* fields are valid. This information is cached
544 because profiling CU expansion showed excessive time spent in
545 producer_is_gxx_lt_4_6. */
546 unsigned int checked_producer
: 1;
547 unsigned int producer_is_gxx_lt_4_6
: 1;
548 unsigned int producer_is_gcc_lt_4_3
: 1;
549 unsigned int producer_is_icc_lt_14
: 1;
551 /* When set, the file that we're processing is known to have
552 debugging info for C++ namespaces. GCC 3.3.x did not produce
553 this information, but later versions do. */
555 unsigned int processing_has_namespace_info
: 1;
557 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
560 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
561 This includes type_unit_group and quick_file_names. */
563 struct stmt_list_hash
565 /* The DWO unit this table is from or NULL if there is none. */
566 struct dwo_unit
*dwo_unit
;
568 /* Offset in .debug_line or .debug_line.dwo. */
569 sect_offset line_sect_off
;
572 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
573 an object of this type. */
575 struct type_unit_group
577 /* dwarf2read.c's main "handle" on a TU symtab.
578 To simplify things we create an artificial CU that "includes" all the
579 type units using this stmt_list so that the rest of the code still has
580 a "per_cu" handle on the symtab.
581 This PER_CU is recognized by having no section. */
582 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
583 struct dwarf2_per_cu_data per_cu
;
585 /* The TUs that share this DW_AT_stmt_list entry.
586 This is added to while parsing type units to build partial symtabs,
587 and is deleted afterwards and not used again. */
588 VEC (sig_type_ptr
) *tus
;
590 /* The compunit symtab.
591 Type units in a group needn't all be defined in the same source file,
592 so we create an essentially anonymous symtab as the compunit symtab. */
593 struct compunit_symtab
*compunit_symtab
;
595 /* The data used to construct the hash key. */
596 struct stmt_list_hash hash
;
598 /* The number of symtabs from the line header.
599 The value here must match line_header.num_file_names. */
600 unsigned int num_symtabs
;
602 /* The symbol tables for this TU (obtained from the files listed in
604 WARNING: The order of entries here must match the order of entries
605 in the line header. After the first TU using this type_unit_group, the
606 line header for the subsequent TUs is recreated from this. This is done
607 because we need to use the same symtabs for each TU using the same
608 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
609 there's no guarantee the line header doesn't have duplicate entries. */
610 struct symtab
**symtabs
;
613 /* These sections are what may appear in a (real or virtual) DWO file. */
617 struct dwarf2_section_info abbrev
;
618 struct dwarf2_section_info line
;
619 struct dwarf2_section_info loc
;
620 struct dwarf2_section_info loclists
;
621 struct dwarf2_section_info macinfo
;
622 struct dwarf2_section_info macro
;
623 struct dwarf2_section_info str
;
624 struct dwarf2_section_info str_offsets
;
625 /* In the case of a virtual DWO file, these two are unused. */
626 struct dwarf2_section_info info
;
627 VEC (dwarf2_section_info_def
) *types
;
630 /* CUs/TUs in DWP/DWO files. */
634 /* Backlink to the containing struct dwo_file. */
635 struct dwo_file
*dwo_file
;
637 /* The "id" that distinguishes this CU/TU.
638 .debug_info calls this "dwo_id", .debug_types calls this "signature".
639 Since signatures came first, we stick with it for consistency. */
642 /* The section this CU/TU lives in, in the DWO file. */
643 struct dwarf2_section_info
*section
;
645 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
646 sect_offset sect_off
;
649 /* For types, offset in the type's DIE of the type defined by this TU. */
650 cu_offset type_offset_in_tu
;
653 /* include/dwarf2.h defines the DWP section codes.
654 It defines a max value but it doesn't define a min value, which we
655 use for error checking, so provide one. */
657 enum dwp_v2_section_ids
662 /* Data for one DWO file.
664 This includes virtual DWO files (a virtual DWO file is a DWO file as it
665 appears in a DWP file). DWP files don't really have DWO files per se -
666 comdat folding of types "loses" the DWO file they came from, and from
667 a high level view DWP files appear to contain a mass of random types.
668 However, to maintain consistency with the non-DWP case we pretend DWP
669 files contain virtual DWO files, and we assign each TU with one virtual
670 DWO file (generally based on the line and abbrev section offsets -
671 a heuristic that seems to work in practice). */
675 /* The DW_AT_GNU_dwo_name attribute.
676 For virtual DWO files the name is constructed from the section offsets
677 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
678 from related CU+TUs. */
679 const char *dwo_name
;
681 /* The DW_AT_comp_dir attribute. */
682 const char *comp_dir
;
684 /* The bfd, when the file is open. Otherwise this is NULL.
685 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
688 /* The sections that make up this DWO file.
689 Remember that for virtual DWO files in DWP V2, these are virtual
690 sections (for lack of a better name). */
691 struct dwo_sections sections
;
693 /* The CUs in the file.
694 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
695 an extension to handle LLVM's Link Time Optimization output (where
696 multiple source files may be compiled into a single object/dwo pair). */
699 /* Table of TUs in the file.
700 Each element is a struct dwo_unit. */
704 /* These sections are what may appear in a DWP file. */
708 /* These are used by both DWP version 1 and 2. */
709 struct dwarf2_section_info str
;
710 struct dwarf2_section_info cu_index
;
711 struct dwarf2_section_info tu_index
;
713 /* These are only used by DWP version 2 files.
714 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
715 sections are referenced by section number, and are not recorded here.
716 In DWP version 2 there is at most one copy of all these sections, each
717 section being (effectively) comprised of the concatenation of all of the
718 individual sections that exist in the version 1 format.
719 To keep the code simple we treat each of these concatenated pieces as a
720 section itself (a virtual section?). */
721 struct dwarf2_section_info abbrev
;
722 struct dwarf2_section_info info
;
723 struct dwarf2_section_info line
;
724 struct dwarf2_section_info loc
;
725 struct dwarf2_section_info macinfo
;
726 struct dwarf2_section_info macro
;
727 struct dwarf2_section_info str_offsets
;
728 struct dwarf2_section_info types
;
731 /* These sections are what may appear in a virtual DWO file in DWP version 1.
732 A virtual DWO file is a DWO file as it appears in a DWP file. */
734 struct virtual_v1_dwo_sections
736 struct dwarf2_section_info abbrev
;
737 struct dwarf2_section_info line
;
738 struct dwarf2_section_info loc
;
739 struct dwarf2_section_info macinfo
;
740 struct dwarf2_section_info macro
;
741 struct dwarf2_section_info str_offsets
;
742 /* Each DWP hash table entry records one CU or one TU.
743 That is recorded here, and copied to dwo_unit.section. */
744 struct dwarf2_section_info info_or_types
;
747 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
748 In version 2, the sections of the DWO files are concatenated together
749 and stored in one section of that name. Thus each ELF section contains
750 several "virtual" sections. */
752 struct virtual_v2_dwo_sections
754 bfd_size_type abbrev_offset
;
755 bfd_size_type abbrev_size
;
757 bfd_size_type line_offset
;
758 bfd_size_type line_size
;
760 bfd_size_type loc_offset
;
761 bfd_size_type loc_size
;
763 bfd_size_type macinfo_offset
;
764 bfd_size_type macinfo_size
;
766 bfd_size_type macro_offset
;
767 bfd_size_type macro_size
;
769 bfd_size_type str_offsets_offset
;
770 bfd_size_type str_offsets_size
;
772 /* Each DWP hash table entry records one CU or one TU.
773 That is recorded here, and copied to dwo_unit.section. */
774 bfd_size_type info_or_types_offset
;
775 bfd_size_type info_or_types_size
;
778 /* Contents of DWP hash tables. */
780 struct dwp_hash_table
782 uint32_t version
, nr_columns
;
783 uint32_t nr_units
, nr_slots
;
784 const gdb_byte
*hash_table
, *unit_table
;
789 const gdb_byte
*indices
;
793 /* This is indexed by column number and gives the id of the section
795 #define MAX_NR_V2_DWO_SECTIONS \
796 (1 /* .debug_info or .debug_types */ \
797 + 1 /* .debug_abbrev */ \
798 + 1 /* .debug_line */ \
799 + 1 /* .debug_loc */ \
800 + 1 /* .debug_str_offsets */ \
801 + 1 /* .debug_macro or .debug_macinfo */)
802 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
803 const gdb_byte
*offsets
;
804 const gdb_byte
*sizes
;
809 /* Data for one DWP file. */
813 /* Name of the file. */
816 /* File format version. */
822 /* Section info for this file. */
823 struct dwp_sections sections
;
825 /* Table of CUs in the file. */
826 const struct dwp_hash_table
*cus
;
828 /* Table of TUs in the file. */
829 const struct dwp_hash_table
*tus
;
831 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
835 /* Table to map ELF section numbers to their sections.
836 This is only needed for the DWP V1 file format. */
837 unsigned int num_sections
;
838 asection
**elf_sections
;
841 /* This represents a '.dwz' file. */
845 /* A dwz file can only contain a few sections. */
846 struct dwarf2_section_info abbrev
;
847 struct dwarf2_section_info info
;
848 struct dwarf2_section_info str
;
849 struct dwarf2_section_info line
;
850 struct dwarf2_section_info macro
;
851 struct dwarf2_section_info gdb_index
;
852 struct dwarf2_section_info debug_names
;
858 /* Struct used to pass misc. parameters to read_die_and_children, et
859 al. which are used for both .debug_info and .debug_types dies.
860 All parameters here are unchanging for the life of the call. This
861 struct exists to abstract away the constant parameters of die reading. */
863 struct die_reader_specs
865 /* The bfd of die_section. */
868 /* The CU of the DIE we are parsing. */
869 struct dwarf2_cu
*cu
;
871 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
872 struct dwo_file
*dwo_file
;
874 /* The section the die comes from.
875 This is either .debug_info or .debug_types, or the .dwo variants. */
876 struct dwarf2_section_info
*die_section
;
878 /* die_section->buffer. */
879 const gdb_byte
*buffer
;
881 /* The end of the buffer. */
882 const gdb_byte
*buffer_end
;
884 /* The value of the DW_AT_comp_dir attribute. */
885 const char *comp_dir
;
887 /* The abbreviation table to use when reading the DIEs. */
888 struct abbrev_table
*abbrev_table
;
891 /* Type of function passed to init_cutu_and_read_dies, et.al. */
892 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
893 const gdb_byte
*info_ptr
,
894 struct die_info
*comp_unit_die
,
898 /* A 1-based directory index. This is a strong typedef to prevent
899 accidentally using a directory index as a 0-based index into an
901 enum class dir_index
: unsigned int {};
903 /* Likewise, a 1-based file name index. */
904 enum class file_name_index
: unsigned int {};
908 file_entry () = default;
910 file_entry (const char *name_
, dir_index d_index_
,
911 unsigned int mod_time_
, unsigned int length_
)
914 mod_time (mod_time_
),
918 /* Return the include directory at D_INDEX stored in LH. Returns
919 NULL if D_INDEX is out of bounds. */
920 const char *include_dir (const line_header
*lh
) const;
922 /* The file name. Note this is an observing pointer. The memory is
923 owned by debug_line_buffer. */
926 /* The directory index (1-based). */
927 dir_index d_index
{};
929 unsigned int mod_time
{};
931 unsigned int length
{};
933 /* True if referenced by the Line Number Program. */
936 /* The associated symbol table, if any. */
937 struct symtab
*symtab
{};
940 /* The line number information for a compilation unit (found in the
941 .debug_line section) begins with a "statement program header",
942 which contains the following information. */
949 /* Add an entry to the include directory table. */
950 void add_include_dir (const char *include_dir
);
952 /* Add an entry to the file name table. */
953 void add_file_name (const char *name
, dir_index d_index
,
954 unsigned int mod_time
, unsigned int length
);
956 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
958 const char *include_dir_at (dir_index index
) const
960 /* Convert directory index number (1-based) to vector index
962 size_t vec_index
= to_underlying (index
) - 1;
964 if (vec_index
>= include_dirs
.size ())
966 return include_dirs
[vec_index
];
969 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
971 file_entry
*file_name_at (file_name_index index
)
973 /* Convert file name index number (1-based) to vector index
975 size_t vec_index
= to_underlying (index
) - 1;
977 if (vec_index
>= file_names
.size ())
979 return &file_names
[vec_index
];
982 /* Const version of the above. */
983 const file_entry
*file_name_at (unsigned int index
) const
985 if (index
>= file_names
.size ())
987 return &file_names
[index
];
990 /* Offset of line number information in .debug_line section. */
991 sect_offset sect_off
{};
993 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
994 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
996 unsigned int total_length
{};
997 unsigned short version
{};
998 unsigned int header_length
{};
999 unsigned char minimum_instruction_length
{};
1000 unsigned char maximum_ops_per_instruction
{};
1001 unsigned char default_is_stmt
{};
1003 unsigned char line_range
{};
1004 unsigned char opcode_base
{};
1006 /* standard_opcode_lengths[i] is the number of operands for the
1007 standard opcode whose value is i. This means that
1008 standard_opcode_lengths[0] is unused, and the last meaningful
1009 element is standard_opcode_lengths[opcode_base - 1]. */
1010 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1012 /* The include_directories table. Note these are observing
1013 pointers. The memory is owned by debug_line_buffer. */
1014 std::vector
<const char *> include_dirs
;
1016 /* The file_names table. */
1017 std::vector
<file_entry
> file_names
;
1019 /* The start and end of the statement program following this
1020 header. These point into dwarf2_per_objfile->line_buffer. */
1021 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1024 typedef std::unique_ptr
<line_header
> line_header_up
;
1027 file_entry::include_dir (const line_header
*lh
) const
1029 return lh
->include_dir_at (d_index
);
1032 /* When we construct a partial symbol table entry we only
1033 need this much information. */
1034 struct partial_die_info
: public allocate_on_obstack
1036 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1038 /* Disable assign but still keep copy ctor, which is needed
1039 load_partial_dies. */
1040 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1042 /* Adjust the partial die before generating a symbol for it. This
1043 function may set the is_external flag or change the DIE's
1045 void fixup (struct dwarf2_cu
*cu
);
1047 /* Read a minimal amount of information into the minimal die
1049 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1050 const struct abbrev_info
&abbrev
,
1051 const gdb_byte
*info_ptr
);
1053 /* Offset of this DIE. */
1054 const sect_offset sect_off
;
1056 /* DWARF-2 tag for this DIE. */
1057 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1059 /* Assorted flags describing the data found in this DIE. */
1060 const unsigned int has_children
: 1;
1062 unsigned int is_external
: 1;
1063 unsigned int is_declaration
: 1;
1064 unsigned int has_type
: 1;
1065 unsigned int has_specification
: 1;
1066 unsigned int has_pc_info
: 1;
1067 unsigned int may_be_inlined
: 1;
1069 /* This DIE has been marked DW_AT_main_subprogram. */
1070 unsigned int main_subprogram
: 1;
1072 /* Flag set if the SCOPE field of this structure has been
1074 unsigned int scope_set
: 1;
1076 /* Flag set if the DIE has a byte_size attribute. */
1077 unsigned int has_byte_size
: 1;
1079 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1080 unsigned int has_const_value
: 1;
1082 /* Flag set if any of the DIE's children are template arguments. */
1083 unsigned int has_template_arguments
: 1;
1085 /* Flag set if fixup has been called on this die. */
1086 unsigned int fixup_called
: 1;
1088 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1089 unsigned int is_dwz
: 1;
1091 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1092 unsigned int spec_is_dwz
: 1;
1094 /* The name of this DIE. Normally the value of DW_AT_name, but
1095 sometimes a default name for unnamed DIEs. */
1096 const char *name
= nullptr;
1098 /* The linkage name, if present. */
1099 const char *linkage_name
= nullptr;
1101 /* The scope to prepend to our children. This is generally
1102 allocated on the comp_unit_obstack, so will disappear
1103 when this compilation unit leaves the cache. */
1104 const char *scope
= nullptr;
1106 /* Some data associated with the partial DIE. The tag determines
1107 which field is live. */
1110 /* The location description associated with this DIE, if any. */
1111 struct dwarf_block
*locdesc
;
1112 /* The offset of an import, for DW_TAG_imported_unit. */
1113 sect_offset sect_off
;
1116 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1117 CORE_ADDR lowpc
= 0;
1118 CORE_ADDR highpc
= 0;
1120 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1121 DW_AT_sibling, if any. */
1122 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1123 could return DW_AT_sibling values to its caller load_partial_dies. */
1124 const gdb_byte
*sibling
= nullptr;
1126 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1127 DW_AT_specification (or DW_AT_abstract_origin or
1128 DW_AT_extension). */
1129 sect_offset spec_offset
{};
1131 /* Pointers to this DIE's parent, first child, and next sibling,
1133 struct partial_die_info
*die_parent
= nullptr;
1134 struct partial_die_info
*die_child
= nullptr;
1135 struct partial_die_info
*die_sibling
= nullptr;
1137 friend struct partial_die_info
*
1138 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1141 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1142 partial_die_info (sect_offset sect_off
)
1143 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1147 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1149 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1154 has_specification
= 0;
1157 main_subprogram
= 0;
1160 has_const_value
= 0;
1161 has_template_arguments
= 0;
1168 /* This data structure holds the information of an abbrev. */
1171 unsigned int number
; /* number identifying abbrev */
1172 enum dwarf_tag tag
; /* dwarf tag */
1173 unsigned short has_children
; /* boolean */
1174 unsigned short num_attrs
; /* number of attributes */
1175 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1176 struct abbrev_info
*next
; /* next in chain */
1181 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1182 ENUM_BITFIELD(dwarf_form
) form
: 16;
1184 /* It is valid only if FORM is DW_FORM_implicit_const. */
1185 LONGEST implicit_const
;
1188 /* Size of abbrev_table.abbrev_hash_table. */
1189 #define ABBREV_HASH_SIZE 121
1191 /* Top level data structure to contain an abbreviation table. */
1195 explicit abbrev_table (sect_offset off
)
1199 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1200 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1203 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1205 /* Allocate space for a struct abbrev_info object in
1207 struct abbrev_info
*alloc_abbrev ();
1209 /* Add an abbreviation to the table. */
1210 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1212 /* Look up an abbrev in the table.
1213 Returns NULL if the abbrev is not found. */
1215 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1218 /* Where the abbrev table came from.
1219 This is used as a sanity check when the table is used. */
1220 const sect_offset sect_off
;
1222 /* Storage for the abbrev table. */
1223 auto_obstack abbrev_obstack
;
1227 /* Hash table of abbrevs.
1228 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1229 It could be statically allocated, but the previous code didn't so we
1231 struct abbrev_info
**m_abbrevs
;
1234 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1236 /* Attributes have a name and a value. */
1239 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1240 ENUM_BITFIELD(dwarf_form
) form
: 15;
1242 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1243 field should be in u.str (existing only for DW_STRING) but it is kept
1244 here for better struct attribute alignment. */
1245 unsigned int string_is_canonical
: 1;
1250 struct dwarf_block
*blk
;
1259 /* This data structure holds a complete die structure. */
1262 /* DWARF-2 tag for this DIE. */
1263 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1265 /* Number of attributes */
1266 unsigned char num_attrs
;
1268 /* True if we're presently building the full type name for the
1269 type derived from this DIE. */
1270 unsigned char building_fullname
: 1;
1272 /* True if this die is in process. PR 16581. */
1273 unsigned char in_process
: 1;
1276 unsigned int abbrev
;
1278 /* Offset in .debug_info or .debug_types section. */
1279 sect_offset sect_off
;
1281 /* The dies in a compilation unit form an n-ary tree. PARENT
1282 points to this die's parent; CHILD points to the first child of
1283 this node; and all the children of a given node are chained
1284 together via their SIBLING fields. */
1285 struct die_info
*child
; /* Its first child, if any. */
1286 struct die_info
*sibling
; /* Its next sibling, if any. */
1287 struct die_info
*parent
; /* Its parent, if any. */
1289 /* An array of attributes, with NUM_ATTRS elements. There may be
1290 zero, but it's not common and zero-sized arrays are not
1291 sufficiently portable C. */
1292 struct attribute attrs
[1];
1295 /* Get at parts of an attribute structure. */
1297 #define DW_STRING(attr) ((attr)->u.str)
1298 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1299 #define DW_UNSND(attr) ((attr)->u.unsnd)
1300 #define DW_BLOCK(attr) ((attr)->u.blk)
1301 #define DW_SND(attr) ((attr)->u.snd)
1302 #define DW_ADDR(attr) ((attr)->u.addr)
1303 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1305 /* Blocks are a bunch of untyped bytes. */
1310 /* Valid only if SIZE is not zero. */
1311 const gdb_byte
*data
;
1314 #ifndef ATTR_ALLOC_CHUNK
1315 #define ATTR_ALLOC_CHUNK 4
1318 /* Allocate fields for structs, unions and enums in this size. */
1319 #ifndef DW_FIELD_ALLOC_CHUNK
1320 #define DW_FIELD_ALLOC_CHUNK 4
1323 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1324 but this would require a corresponding change in unpack_field_as_long
1326 static int bits_per_byte
= 8;
1328 /* When reading a variant or variant part, we track a bit more
1329 information about the field, and store it in an object of this
1332 struct variant_field
1334 /* If we see a DW_TAG_variant, then this will be the discriminant
1336 ULONGEST discriminant_value
;
1337 /* If we see a DW_TAG_variant, then this will be set if this is the
1339 bool default_branch
;
1340 /* While reading a DW_TAG_variant_part, this will be set if this
1341 field is the discriminant. */
1342 bool is_discriminant
;
1347 int accessibility
= 0;
1349 /* Extra information to describe a variant or variant part. */
1350 struct variant_field variant
{};
1351 struct field field
{};
1356 const char *name
= nullptr;
1357 std::vector
<struct fn_field
> fnfields
;
1360 /* The routines that read and process dies for a C struct or C++ class
1361 pass lists of data member fields and lists of member function fields
1362 in an instance of a field_info structure, as defined below. */
1365 /* List of data member and baseclasses fields. */
1366 std::vector
<struct nextfield
> fields
;
1367 std::vector
<struct nextfield
> baseclasses
;
1369 /* Number of fields (including baseclasses). */
1372 /* Set if the accesibility of one of the fields is not public. */
1373 int non_public_fields
= 0;
1375 /* Member function fieldlist array, contains name of possibly overloaded
1376 member function, number of overloaded member functions and a pointer
1377 to the head of the member function field chain. */
1378 std::vector
<struct fnfieldlist
> fnfieldlists
;
1380 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1381 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1382 std::vector
<struct decl_field
> typedef_field_list
;
1384 /* Nested types defined by this class and the number of elements in this
1386 std::vector
<struct decl_field
> nested_types_list
;
1389 /* One item on the queue of compilation units to read in full symbols
1391 struct dwarf2_queue_item
1393 struct dwarf2_per_cu_data
*per_cu
;
1394 enum language pretend_language
;
1395 struct dwarf2_queue_item
*next
;
1398 /* The current queue. */
1399 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1401 /* Loaded secondary compilation units are kept in memory until they
1402 have not been referenced for the processing of this many
1403 compilation units. Set this to zero to disable caching. Cache
1404 sizes of up to at least twenty will improve startup time for
1405 typical inter-CU-reference binaries, at an obvious memory cost. */
1406 static int dwarf_max_cache_age
= 5;
1408 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1409 struct cmd_list_element
*c
, const char *value
)
1411 fprintf_filtered (file
, _("The upper bound on the age of cached "
1412 "DWARF compilation units is %s.\n"),
1416 /* local function prototypes */
1418 static const char *get_section_name (const struct dwarf2_section_info
*);
1420 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1422 static void dwarf2_find_base_address (struct die_info
*die
,
1423 struct dwarf2_cu
*cu
);
1425 static struct partial_symtab
*create_partial_symtab
1426 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1428 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1429 const gdb_byte
*info_ptr
,
1430 struct die_info
*type_unit_die
,
1431 int has_children
, void *data
);
1433 static void dwarf2_build_psymtabs_hard
1434 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1436 static void scan_partial_symbols (struct partial_die_info
*,
1437 CORE_ADDR
*, CORE_ADDR
*,
1438 int, struct dwarf2_cu
*);
1440 static void add_partial_symbol (struct partial_die_info
*,
1441 struct dwarf2_cu
*);
1443 static void add_partial_namespace (struct partial_die_info
*pdi
,
1444 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1445 int set_addrmap
, struct dwarf2_cu
*cu
);
1447 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1448 CORE_ADDR
*highpc
, int set_addrmap
,
1449 struct dwarf2_cu
*cu
);
1451 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1452 struct dwarf2_cu
*cu
);
1454 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1455 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1456 int need_pc
, struct dwarf2_cu
*cu
);
1458 static void dwarf2_read_symtab (struct partial_symtab
*,
1461 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1463 static abbrev_table_up abbrev_table_read_table
1464 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1467 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1469 static struct partial_die_info
*load_partial_dies
1470 (const struct die_reader_specs
*, const gdb_byte
*, int);
1472 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1473 struct dwarf2_cu
*);
1475 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1476 struct attribute
*, struct attr_abbrev
*,
1479 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1481 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1483 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1485 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1487 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1489 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1492 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1494 static LONGEST read_checked_initial_length_and_offset
1495 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1496 unsigned int *, unsigned int *);
1498 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1499 const struct comp_unit_head
*,
1502 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1504 static sect_offset read_abbrev_offset
1505 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1506 struct dwarf2_section_info
*, sect_offset
);
1508 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1510 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1512 static const char *read_indirect_string
1513 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1514 const struct comp_unit_head
*, unsigned int *);
1516 static const char *read_indirect_line_string
1517 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1518 const struct comp_unit_head
*, unsigned int *);
1520 static const char *read_indirect_string_at_offset
1521 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1522 LONGEST str_offset
);
1524 static const char *read_indirect_string_from_dwz
1525 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1527 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1529 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1533 static const char *read_str_index (const struct die_reader_specs
*reader
,
1534 ULONGEST str_index
);
1536 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1538 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1539 struct dwarf2_cu
*);
1541 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1544 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1545 struct dwarf2_cu
*cu
);
1547 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1548 struct dwarf2_cu
*cu
);
1550 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1552 static struct die_info
*die_specification (struct die_info
*die
,
1553 struct dwarf2_cu
**);
1555 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1556 struct dwarf2_cu
*cu
);
1558 static void dwarf_decode_lines (struct line_header
*, const char *,
1559 struct dwarf2_cu
*, struct partial_symtab
*,
1560 CORE_ADDR
, int decode_mapping
);
1562 static void dwarf2_start_subfile (const char *, const char *);
1564 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1565 const char *, const char *,
1568 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1569 struct dwarf2_cu
*, struct symbol
* = NULL
);
1571 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1572 struct dwarf2_cu
*);
1574 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1577 struct obstack
*obstack
,
1578 struct dwarf2_cu
*cu
, LONGEST
*value
,
1579 const gdb_byte
**bytes
,
1580 struct dwarf2_locexpr_baton
**baton
);
1582 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1584 static int need_gnat_info (struct dwarf2_cu
*);
1586 static struct type
*die_descriptive_type (struct die_info
*,
1587 struct dwarf2_cu
*);
1589 static void set_descriptive_type (struct type
*, struct die_info
*,
1590 struct dwarf2_cu
*);
1592 static struct type
*die_containing_type (struct die_info
*,
1593 struct dwarf2_cu
*);
1595 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1596 struct dwarf2_cu
*);
1598 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1600 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1602 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1604 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1605 const char *suffix
, int physname
,
1606 struct dwarf2_cu
*cu
);
1608 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1610 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1612 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1614 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1616 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1618 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1620 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1621 struct dwarf2_cu
*, struct partial_symtab
*);
1623 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1624 values. Keep the items ordered with increasing constraints compliance. */
1627 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1628 PC_BOUNDS_NOT_PRESENT
,
1630 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1631 were present but they do not form a valid range of PC addresses. */
1634 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1637 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1641 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1642 CORE_ADDR
*, CORE_ADDR
*,
1644 struct partial_symtab
*);
1646 static void get_scope_pc_bounds (struct die_info
*,
1647 CORE_ADDR
*, CORE_ADDR
*,
1648 struct dwarf2_cu
*);
1650 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1651 CORE_ADDR
, struct dwarf2_cu
*);
1653 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1654 struct dwarf2_cu
*);
1656 static void dwarf2_attach_fields_to_type (struct field_info
*,
1657 struct type
*, struct dwarf2_cu
*);
1659 static void dwarf2_add_member_fn (struct field_info
*,
1660 struct die_info
*, struct type
*,
1661 struct dwarf2_cu
*);
1663 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1665 struct dwarf2_cu
*);
1667 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1669 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1671 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1673 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1675 static struct using_direct
**using_directives (enum language
);
1677 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1679 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1681 static struct type
*read_module_type (struct die_info
*die
,
1682 struct dwarf2_cu
*cu
);
1684 static const char *namespace_name (struct die_info
*die
,
1685 int *is_anonymous
, struct dwarf2_cu
*);
1687 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1689 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1691 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1692 struct dwarf2_cu
*);
1694 static struct die_info
*read_die_and_siblings_1
1695 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1698 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1699 const gdb_byte
*info_ptr
,
1700 const gdb_byte
**new_info_ptr
,
1701 struct die_info
*parent
);
1703 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1704 struct die_info
**, const gdb_byte
*,
1707 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1708 struct die_info
**, const gdb_byte
*,
1711 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1713 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1716 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1718 static const char *dwarf2_full_name (const char *name
,
1719 struct die_info
*die
,
1720 struct dwarf2_cu
*cu
);
1722 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1723 struct dwarf2_cu
*cu
);
1725 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1726 struct dwarf2_cu
**);
1728 static const char *dwarf_tag_name (unsigned int);
1730 static const char *dwarf_attr_name (unsigned int);
1732 static const char *dwarf_form_name (unsigned int);
1734 static const char *dwarf_bool_name (unsigned int);
1736 static const char *dwarf_type_encoding_name (unsigned int);
1738 static struct die_info
*sibling_die (struct die_info
*);
1740 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1742 static void dump_die_for_error (struct die_info
*);
1744 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1747 /*static*/ void dump_die (struct die_info
*, int max_level
);
1749 static void store_in_ref_table (struct die_info
*,
1750 struct dwarf2_cu
*);
1752 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1754 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1756 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1757 const struct attribute
*,
1758 struct dwarf2_cu
**);
1760 static struct die_info
*follow_die_ref (struct die_info
*,
1761 const struct attribute
*,
1762 struct dwarf2_cu
**);
1764 static struct die_info
*follow_die_sig (struct die_info
*,
1765 const struct attribute
*,
1766 struct dwarf2_cu
**);
1768 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1769 struct dwarf2_cu
*);
1771 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1772 const struct attribute
*,
1773 struct dwarf2_cu
*);
1775 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1777 static void read_signatured_type (struct signatured_type
*);
1779 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1780 struct die_info
*die
, struct dwarf2_cu
*cu
,
1781 struct dynamic_prop
*prop
);
1783 /* memory allocation interface */
1785 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1787 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1789 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1791 static int attr_form_is_block (const struct attribute
*);
1793 static int attr_form_is_section_offset (const struct attribute
*);
1795 static int attr_form_is_constant (const struct attribute
*);
1797 static int attr_form_is_ref (const struct attribute
*);
1799 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1800 struct dwarf2_loclist_baton
*baton
,
1801 const struct attribute
*attr
);
1803 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1805 struct dwarf2_cu
*cu
,
1808 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1809 const gdb_byte
*info_ptr
,
1810 struct abbrev_info
*abbrev
);
1812 static hashval_t
partial_die_hash (const void *item
);
1814 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1816 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1817 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1818 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1820 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1821 struct die_info
*comp_unit_die
,
1822 enum language pretend_language
);
1824 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1826 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1828 static struct type
*set_die_type (struct die_info
*, struct type
*,
1829 struct dwarf2_cu
*);
1831 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1833 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1835 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1838 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1841 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1844 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1845 struct dwarf2_per_cu_data
*);
1847 static void dwarf2_mark (struct dwarf2_cu
*);
1849 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1851 static struct type
*get_die_type_at_offset (sect_offset
,
1852 struct dwarf2_per_cu_data
*);
1854 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1856 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1857 enum language pretend_language
);
1859 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1861 /* Class, the destructor of which frees all allocated queue entries. This
1862 will only have work to do if an error was thrown while processing the
1863 dwarf. If no error was thrown then the queue entries should have all
1864 been processed, and freed, as we went along. */
1866 class dwarf2_queue_guard
1869 dwarf2_queue_guard () = default;
1871 /* Free any entries remaining on the queue. There should only be
1872 entries left if we hit an error while processing the dwarf. */
1873 ~dwarf2_queue_guard ()
1875 struct dwarf2_queue_item
*item
, *last
;
1877 item
= dwarf2_queue
;
1880 /* Anything still marked queued is likely to be in an
1881 inconsistent state, so discard it. */
1882 if (item
->per_cu
->queued
)
1884 if (item
->per_cu
->cu
!= NULL
)
1885 free_one_cached_comp_unit (item
->per_cu
);
1886 item
->per_cu
->queued
= 0;
1894 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1898 /* The return type of find_file_and_directory. Note, the enclosed
1899 string pointers are only valid while this object is valid. */
1901 struct file_and_directory
1903 /* The filename. This is never NULL. */
1906 /* The compilation directory. NULL if not known. If we needed to
1907 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1908 points directly to the DW_AT_comp_dir string attribute owned by
1909 the obstack that owns the DIE. */
1910 const char *comp_dir
;
1912 /* If we needed to build a new string for comp_dir, this is what
1913 owns the storage. */
1914 std::string comp_dir_storage
;
1917 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1918 struct dwarf2_cu
*cu
);
1920 static char *file_full_name (int file
, struct line_header
*lh
,
1921 const char *comp_dir
);
1923 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1924 enum class rcuh_kind
{ COMPILE
, TYPE
};
1926 static const gdb_byte
*read_and_check_comp_unit_head
1927 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1928 struct comp_unit_head
*header
,
1929 struct dwarf2_section_info
*section
,
1930 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1931 rcuh_kind section_kind
);
1933 static void init_cutu_and_read_dies
1934 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1935 int use_existing_cu
, int keep
,
1936 die_reader_func_ftype
*die_reader_func
, void *data
);
1938 static void init_cutu_and_read_dies_simple
1939 (struct dwarf2_per_cu_data
*this_cu
,
1940 die_reader_func_ftype
*die_reader_func
, void *data
);
1942 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1944 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1946 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1947 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1948 struct dwp_file
*dwp_file
, const char *comp_dir
,
1949 ULONGEST signature
, int is_debug_types
);
1951 static struct dwp_file
*get_dwp_file
1952 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1954 static struct dwo_unit
*lookup_dwo_comp_unit
1955 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1957 static struct dwo_unit
*lookup_dwo_type_unit
1958 (struct signatured_type
*, const char *, const char *);
1960 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1962 static void free_dwo_file_cleanup (void *);
1964 struct free_dwo_file_cleanup_data
1966 struct dwo_file
*dwo_file
;
1967 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
1970 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1972 static void check_producer (struct dwarf2_cu
*cu
);
1974 static void free_line_header_voidp (void *arg
);
1976 /* Various complaints about symbol reading that don't abort the process. */
1979 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1981 complaint (&symfile_complaints
,
1982 _("statement list doesn't fit in .debug_line section"));
1986 dwarf2_debug_line_missing_file_complaint (void)
1988 complaint (&symfile_complaints
,
1989 _(".debug_line section has line data without a file"));
1993 dwarf2_debug_line_missing_end_sequence_complaint (void)
1995 complaint (&symfile_complaints
,
1996 _(".debug_line section has line "
1997 "program sequence without an end"));
2001 dwarf2_complex_location_expr_complaint (void)
2003 complaint (&symfile_complaints
, _("location expression too complex"));
2007 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2010 complaint (&symfile_complaints
,
2011 _("const value length mismatch for '%s', got %d, expected %d"),
2016 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2018 complaint (&symfile_complaints
,
2019 _("debug info runs off end of %s section"
2021 get_section_name (section
),
2022 get_section_file_name (section
));
2026 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2028 complaint (&symfile_complaints
,
2029 _("macro debug info contains a "
2030 "malformed macro definition:\n`%s'"),
2035 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2037 complaint (&symfile_complaints
,
2038 _("invalid attribute class or form for '%s' in '%s'"),
2042 /* Hash function for line_header_hash. */
2045 line_header_hash (const struct line_header
*ofs
)
2047 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2050 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2053 line_header_hash_voidp (const void *item
)
2055 const struct line_header
*ofs
= (const struct line_header
*) item
;
2057 return line_header_hash (ofs
);
2060 /* Equality function for line_header_hash. */
2063 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2065 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2066 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2068 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2069 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2074 /* Read the given attribute value as an address, taking the attribute's
2075 form into account. */
2078 attr_value_as_address (struct attribute
*attr
)
2082 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2084 /* Aside from a few clearly defined exceptions, attributes that
2085 contain an address must always be in DW_FORM_addr form.
2086 Unfortunately, some compilers happen to be violating this
2087 requirement by encoding addresses using other forms, such
2088 as DW_FORM_data4 for example. For those broken compilers,
2089 we try to do our best, without any guarantee of success,
2090 to interpret the address correctly. It would also be nice
2091 to generate a complaint, but that would require us to maintain
2092 a list of legitimate cases where a non-address form is allowed,
2093 as well as update callers to pass in at least the CU's DWARF
2094 version. This is more overhead than what we're willing to
2095 expand for a pretty rare case. */
2096 addr
= DW_UNSND (attr
);
2099 addr
= DW_ADDR (attr
);
2104 /* See declaration. */
2106 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2107 const dwarf2_debug_sections
*names
)
2108 : objfile (objfile_
)
2111 names
= &dwarf2_elf_names
;
2113 bfd
*obfd
= objfile
->obfd
;
2115 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2116 locate_sections (obfd
, sec
, *names
);
2119 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2121 dwarf2_per_objfile::~dwarf2_per_objfile ()
2123 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2124 free_cached_comp_units ();
2126 if (quick_file_names_table
)
2127 htab_delete (quick_file_names_table
);
2129 if (line_header_hash
)
2130 htab_delete (line_header_hash
);
2132 for (int ix
= 0; ix
< n_comp_units
; ++ix
)
2133 VEC_free (dwarf2_per_cu_ptr
, all_comp_units
[ix
]->imported_symtabs
);
2135 for (int ix
= 0; ix
< n_type_units
; ++ix
)
2136 VEC_free (dwarf2_per_cu_ptr
,
2137 all_type_units
[ix
]->per_cu
.imported_symtabs
);
2138 xfree (all_type_units
);
2140 VEC_free (dwarf2_section_info_def
, types
);
2142 if (dwo_files
!= NULL
)
2143 free_dwo_files (dwo_files
, objfile
);
2144 if (dwp_file
!= NULL
)
2145 gdb_bfd_unref (dwp_file
->dbfd
);
2147 if (dwz_file
!= NULL
&& dwz_file
->dwz_bfd
)
2148 gdb_bfd_unref (dwz_file
->dwz_bfd
);
2150 if (index_table
!= NULL
)
2151 index_table
->~mapped_index ();
2153 /* Everything else should be on the objfile obstack. */
2156 /* See declaration. */
2159 dwarf2_per_objfile::free_cached_comp_units ()
2161 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2162 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2163 while (per_cu
!= NULL
)
2165 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2168 *last_chain
= next_cu
;
2173 /* A helper class that calls free_cached_comp_units on
2176 class free_cached_comp_units
2180 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2181 : m_per_objfile (per_objfile
)
2185 ~free_cached_comp_units ()
2187 m_per_objfile
->free_cached_comp_units ();
2190 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2194 dwarf2_per_objfile
*m_per_objfile
;
2197 /* Try to locate the sections we need for DWARF 2 debugging
2198 information and return true if we have enough to do something.
2199 NAMES points to the dwarf2 section names, or is NULL if the standard
2200 ELF names are used. */
2203 dwarf2_has_info (struct objfile
*objfile
,
2204 const struct dwarf2_debug_sections
*names
)
2206 if (objfile
->flags
& OBJF_READNEVER
)
2209 struct dwarf2_per_objfile
*dwarf2_per_objfile
2210 = get_dwarf2_per_objfile (objfile
);
2212 if (dwarf2_per_objfile
== NULL
)
2214 /* Initialize per-objfile state. */
2216 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2218 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2220 return (!dwarf2_per_objfile
->info
.is_virtual
2221 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2222 && !dwarf2_per_objfile
->abbrev
.is_virtual
2223 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2226 /* Return the containing section of virtual section SECTION. */
2228 static struct dwarf2_section_info
*
2229 get_containing_section (const struct dwarf2_section_info
*section
)
2231 gdb_assert (section
->is_virtual
);
2232 return section
->s
.containing_section
;
2235 /* Return the bfd owner of SECTION. */
2238 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2240 if (section
->is_virtual
)
2242 section
= get_containing_section (section
);
2243 gdb_assert (!section
->is_virtual
);
2245 return section
->s
.section
->owner
;
2248 /* Return the bfd section of SECTION.
2249 Returns NULL if the section is not present. */
2252 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2254 if (section
->is_virtual
)
2256 section
= get_containing_section (section
);
2257 gdb_assert (!section
->is_virtual
);
2259 return section
->s
.section
;
2262 /* Return the name of SECTION. */
2265 get_section_name (const struct dwarf2_section_info
*section
)
2267 asection
*sectp
= get_section_bfd_section (section
);
2269 gdb_assert (sectp
!= NULL
);
2270 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2273 /* Return the name of the file SECTION is in. */
2276 get_section_file_name (const struct dwarf2_section_info
*section
)
2278 bfd
*abfd
= get_section_bfd_owner (section
);
2280 return bfd_get_filename (abfd
);
2283 /* Return the id of SECTION.
2284 Returns 0 if SECTION doesn't exist. */
2287 get_section_id (const struct dwarf2_section_info
*section
)
2289 asection
*sectp
= get_section_bfd_section (section
);
2296 /* Return the flags of SECTION.
2297 SECTION (or containing section if this is a virtual section) must exist. */
2300 get_section_flags (const struct dwarf2_section_info
*section
)
2302 asection
*sectp
= get_section_bfd_section (section
);
2304 gdb_assert (sectp
!= NULL
);
2305 return bfd_get_section_flags (sectp
->owner
, sectp
);
2308 /* When loading sections, we look either for uncompressed section or for
2309 compressed section names. */
2312 section_is_p (const char *section_name
,
2313 const struct dwarf2_section_names
*names
)
2315 if (names
->normal
!= NULL
2316 && strcmp (section_name
, names
->normal
) == 0)
2318 if (names
->compressed
!= NULL
2319 && strcmp (section_name
, names
->compressed
) == 0)
2324 /* See declaration. */
2327 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2328 const dwarf2_debug_sections
&names
)
2330 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2332 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2335 else if (section_is_p (sectp
->name
, &names
.info
))
2337 this->info
.s
.section
= sectp
;
2338 this->info
.size
= bfd_get_section_size (sectp
);
2340 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2342 this->abbrev
.s
.section
= sectp
;
2343 this->abbrev
.size
= bfd_get_section_size (sectp
);
2345 else if (section_is_p (sectp
->name
, &names
.line
))
2347 this->line
.s
.section
= sectp
;
2348 this->line
.size
= bfd_get_section_size (sectp
);
2350 else if (section_is_p (sectp
->name
, &names
.loc
))
2352 this->loc
.s
.section
= sectp
;
2353 this->loc
.size
= bfd_get_section_size (sectp
);
2355 else if (section_is_p (sectp
->name
, &names
.loclists
))
2357 this->loclists
.s
.section
= sectp
;
2358 this->loclists
.size
= bfd_get_section_size (sectp
);
2360 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2362 this->macinfo
.s
.section
= sectp
;
2363 this->macinfo
.size
= bfd_get_section_size (sectp
);
2365 else if (section_is_p (sectp
->name
, &names
.macro
))
2367 this->macro
.s
.section
= sectp
;
2368 this->macro
.size
= bfd_get_section_size (sectp
);
2370 else if (section_is_p (sectp
->name
, &names
.str
))
2372 this->str
.s
.section
= sectp
;
2373 this->str
.size
= bfd_get_section_size (sectp
);
2375 else if (section_is_p (sectp
->name
, &names
.line_str
))
2377 this->line_str
.s
.section
= sectp
;
2378 this->line_str
.size
= bfd_get_section_size (sectp
);
2380 else if (section_is_p (sectp
->name
, &names
.addr
))
2382 this->addr
.s
.section
= sectp
;
2383 this->addr
.size
= bfd_get_section_size (sectp
);
2385 else if (section_is_p (sectp
->name
, &names
.frame
))
2387 this->frame
.s
.section
= sectp
;
2388 this->frame
.size
= bfd_get_section_size (sectp
);
2390 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2392 this->eh_frame
.s
.section
= sectp
;
2393 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2395 else if (section_is_p (sectp
->name
, &names
.ranges
))
2397 this->ranges
.s
.section
= sectp
;
2398 this->ranges
.size
= bfd_get_section_size (sectp
);
2400 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2402 this->rnglists
.s
.section
= sectp
;
2403 this->rnglists
.size
= bfd_get_section_size (sectp
);
2405 else if (section_is_p (sectp
->name
, &names
.types
))
2407 struct dwarf2_section_info type_section
;
2409 memset (&type_section
, 0, sizeof (type_section
));
2410 type_section
.s
.section
= sectp
;
2411 type_section
.size
= bfd_get_section_size (sectp
);
2413 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2416 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2418 this->gdb_index
.s
.section
= sectp
;
2419 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2421 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2423 this->debug_names
.s
.section
= sectp
;
2424 this->debug_names
.size
= bfd_get_section_size (sectp
);
2426 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2428 this->debug_aranges
.s
.section
= sectp
;
2429 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2432 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2433 && bfd_section_vma (abfd
, sectp
) == 0)
2434 this->has_section_at_zero
= true;
2437 /* A helper function that decides whether a section is empty,
2441 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2443 if (section
->is_virtual
)
2444 return section
->size
== 0;
2445 return section
->s
.section
== NULL
|| section
->size
== 0;
2448 /* See dwarf2read.h. */
2451 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2455 gdb_byte
*buf
, *retbuf
;
2459 info
->buffer
= NULL
;
2462 if (dwarf2_section_empty_p (info
))
2465 sectp
= get_section_bfd_section (info
);
2467 /* If this is a virtual section we need to read in the real one first. */
2468 if (info
->is_virtual
)
2470 struct dwarf2_section_info
*containing_section
=
2471 get_containing_section (info
);
2473 gdb_assert (sectp
!= NULL
);
2474 if ((sectp
->flags
& SEC_RELOC
) != 0)
2476 error (_("Dwarf Error: DWP format V2 with relocations is not"
2477 " supported in section %s [in module %s]"),
2478 get_section_name (info
), get_section_file_name (info
));
2480 dwarf2_read_section (objfile
, containing_section
);
2481 /* Other code should have already caught virtual sections that don't
2483 gdb_assert (info
->virtual_offset
+ info
->size
2484 <= containing_section
->size
);
2485 /* If the real section is empty or there was a problem reading the
2486 section we shouldn't get here. */
2487 gdb_assert (containing_section
->buffer
!= NULL
);
2488 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2492 /* If the section has relocations, we must read it ourselves.
2493 Otherwise we attach it to the BFD. */
2494 if ((sectp
->flags
& SEC_RELOC
) == 0)
2496 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2500 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2503 /* When debugging .o files, we may need to apply relocations; see
2504 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2505 We never compress sections in .o files, so we only need to
2506 try this when the section is not compressed. */
2507 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2510 info
->buffer
= retbuf
;
2514 abfd
= get_section_bfd_owner (info
);
2515 gdb_assert (abfd
!= NULL
);
2517 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2518 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2520 error (_("Dwarf Error: Can't read DWARF data"
2521 " in section %s [in module %s]"),
2522 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2526 /* A helper function that returns the size of a section in a safe way.
2527 If you are positive that the section has been read before using the
2528 size, then it is safe to refer to the dwarf2_section_info object's
2529 "size" field directly. In other cases, you must call this
2530 function, because for compressed sections the size field is not set
2531 correctly until the section has been read. */
2533 static bfd_size_type
2534 dwarf2_section_size (struct objfile
*objfile
,
2535 struct dwarf2_section_info
*info
)
2538 dwarf2_read_section (objfile
, info
);
2542 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2546 dwarf2_get_section_info (struct objfile
*objfile
,
2547 enum dwarf2_section_enum sect
,
2548 asection
**sectp
, const gdb_byte
**bufp
,
2549 bfd_size_type
*sizep
)
2551 struct dwarf2_per_objfile
*data
2552 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2553 dwarf2_objfile_data_key
);
2554 struct dwarf2_section_info
*info
;
2556 /* We may see an objfile without any DWARF, in which case we just
2567 case DWARF2_DEBUG_FRAME
:
2568 info
= &data
->frame
;
2570 case DWARF2_EH_FRAME
:
2571 info
= &data
->eh_frame
;
2574 gdb_assert_not_reached ("unexpected section");
2577 dwarf2_read_section (objfile
, info
);
2579 *sectp
= get_section_bfd_section (info
);
2580 *bufp
= info
->buffer
;
2581 *sizep
= info
->size
;
2584 /* A helper function to find the sections for a .dwz file. */
2587 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2589 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2591 /* Note that we only support the standard ELF names, because .dwz
2592 is ELF-only (at the time of writing). */
2593 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2595 dwz_file
->abbrev
.s
.section
= sectp
;
2596 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2598 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2600 dwz_file
->info
.s
.section
= sectp
;
2601 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2603 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2605 dwz_file
->str
.s
.section
= sectp
;
2606 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2608 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2610 dwz_file
->line
.s
.section
= sectp
;
2611 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2613 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2615 dwz_file
->macro
.s
.section
= sectp
;
2616 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2618 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2620 dwz_file
->gdb_index
.s
.section
= sectp
;
2621 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2623 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2625 dwz_file
->debug_names
.s
.section
= sectp
;
2626 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2630 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2631 there is no .gnu_debugaltlink section in the file. Error if there
2632 is such a section but the file cannot be found. */
2634 static struct dwz_file
*
2635 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2637 const char *filename
;
2638 struct dwz_file
*result
;
2639 bfd_size_type buildid_len_arg
;
2643 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2644 return dwarf2_per_objfile
->dwz_file
;
2646 bfd_set_error (bfd_error_no_error
);
2647 gdb::unique_xmalloc_ptr
<char> data
2648 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2649 &buildid_len_arg
, &buildid
));
2652 if (bfd_get_error () == bfd_error_no_error
)
2654 error (_("could not read '.gnu_debugaltlink' section: %s"),
2655 bfd_errmsg (bfd_get_error ()));
2658 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2660 buildid_len
= (size_t) buildid_len_arg
;
2662 filename
= data
.get ();
2664 std::string abs_storage
;
2665 if (!IS_ABSOLUTE_PATH (filename
))
2667 gdb::unique_xmalloc_ptr
<char> abs
2668 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2670 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2671 filename
= abs_storage
.c_str ();
2674 /* First try the file name given in the section. If that doesn't
2675 work, try to use the build-id instead. */
2676 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2677 if (dwz_bfd
!= NULL
)
2679 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2683 if (dwz_bfd
== NULL
)
2684 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2686 if (dwz_bfd
== NULL
)
2687 error (_("could not find '.gnu_debugaltlink' file for %s"),
2688 objfile_name (dwarf2_per_objfile
->objfile
));
2690 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2692 result
->dwz_bfd
= dwz_bfd
.release ();
2694 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2696 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2697 dwarf2_per_objfile
->dwz_file
= result
;
2701 /* DWARF quick_symbols_functions support. */
2703 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2704 unique line tables, so we maintain a separate table of all .debug_line
2705 derived entries to support the sharing.
2706 All the quick functions need is the list of file names. We discard the
2707 line_header when we're done and don't need to record it here. */
2708 struct quick_file_names
2710 /* The data used to construct the hash key. */
2711 struct stmt_list_hash hash
;
2713 /* The number of entries in file_names, real_names. */
2714 unsigned int num_file_names
;
2716 /* The file names from the line table, after being run through
2718 const char **file_names
;
2720 /* The file names from the line table after being run through
2721 gdb_realpath. These are computed lazily. */
2722 const char **real_names
;
2725 /* When using the index (and thus not using psymtabs), each CU has an
2726 object of this type. This is used to hold information needed by
2727 the various "quick" methods. */
2728 struct dwarf2_per_cu_quick_data
2730 /* The file table. This can be NULL if there was no file table
2731 or it's currently not read in.
2732 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2733 struct quick_file_names
*file_names
;
2735 /* The corresponding symbol table. This is NULL if symbols for this
2736 CU have not yet been read. */
2737 struct compunit_symtab
*compunit_symtab
;
2739 /* A temporary mark bit used when iterating over all CUs in
2740 expand_symtabs_matching. */
2741 unsigned int mark
: 1;
2743 /* True if we've tried to read the file table and found there isn't one.
2744 There will be no point in trying to read it again next time. */
2745 unsigned int no_file_data
: 1;
2748 /* Utility hash function for a stmt_list_hash. */
2751 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2755 if (stmt_list_hash
->dwo_unit
!= NULL
)
2756 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2757 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2761 /* Utility equality function for a stmt_list_hash. */
2764 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2765 const struct stmt_list_hash
*rhs
)
2767 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2769 if (lhs
->dwo_unit
!= NULL
2770 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2773 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2776 /* Hash function for a quick_file_names. */
2779 hash_file_name_entry (const void *e
)
2781 const struct quick_file_names
*file_data
2782 = (const struct quick_file_names
*) e
;
2784 return hash_stmt_list_entry (&file_data
->hash
);
2787 /* Equality function for a quick_file_names. */
2790 eq_file_name_entry (const void *a
, const void *b
)
2792 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2793 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2795 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2798 /* Delete function for a quick_file_names. */
2801 delete_file_name_entry (void *e
)
2803 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2806 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2808 xfree ((void*) file_data
->file_names
[i
]);
2809 if (file_data
->real_names
)
2810 xfree ((void*) file_data
->real_names
[i
]);
2813 /* The space for the struct itself lives on objfile_obstack,
2814 so we don't free it here. */
2817 /* Create a quick_file_names hash table. */
2820 create_quick_file_names_table (unsigned int nr_initial_entries
)
2822 return htab_create_alloc (nr_initial_entries
,
2823 hash_file_name_entry
, eq_file_name_entry
,
2824 delete_file_name_entry
, xcalloc
, xfree
);
2827 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2828 have to be created afterwards. You should call age_cached_comp_units after
2829 processing PER_CU->CU. dw2_setup must have been already called. */
2832 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2834 if (per_cu
->is_debug_types
)
2835 load_full_type_unit (per_cu
);
2837 load_full_comp_unit (per_cu
, language_minimal
);
2839 if (per_cu
->cu
== NULL
)
2840 return; /* Dummy CU. */
2842 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2845 /* Read in the symbols for PER_CU. */
2848 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2850 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2852 /* Skip type_unit_groups, reading the type units they contain
2853 is handled elsewhere. */
2854 if (IS_TYPE_UNIT_GROUP (per_cu
))
2857 /* The destructor of dwarf2_queue_guard frees any entries left on
2858 the queue. After this point we're guaranteed to leave this function
2859 with the dwarf queue empty. */
2860 dwarf2_queue_guard q_guard
;
2862 if (dwarf2_per_objfile
->using_index
2863 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2864 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2866 queue_comp_unit (per_cu
, language_minimal
);
2869 /* If we just loaded a CU from a DWO, and we're working with an index
2870 that may badly handle TUs, load all the TUs in that DWO as well.
2871 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2872 if (!per_cu
->is_debug_types
2873 && per_cu
->cu
!= NULL
2874 && per_cu
->cu
->dwo_unit
!= NULL
2875 && dwarf2_per_objfile
->index_table
!= NULL
2876 && dwarf2_per_objfile
->index_table
->version
<= 7
2877 /* DWP files aren't supported yet. */
2878 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2879 queue_and_load_all_dwo_tus (per_cu
);
2882 process_queue (dwarf2_per_objfile
);
2884 /* Age the cache, releasing compilation units that have not
2885 been used recently. */
2886 age_cached_comp_units (dwarf2_per_objfile
);
2889 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2890 the objfile from which this CU came. Returns the resulting symbol
2893 static struct compunit_symtab
*
2894 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2896 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2898 gdb_assert (dwarf2_per_objfile
->using_index
);
2899 if (!per_cu
->v
.quick
->compunit_symtab
)
2901 free_cached_comp_units
freer (dwarf2_per_objfile
);
2902 scoped_restore decrementer
= increment_reading_symtab ();
2903 dw2_do_instantiate_symtab (per_cu
);
2904 process_cu_includes (dwarf2_per_objfile
);
2907 return per_cu
->v
.quick
->compunit_symtab
;
2910 /* Return the CU/TU given its index.
2912 This is intended for loops like:
2914 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2915 + dwarf2_per_objfile->n_type_units); ++i)
2917 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2923 static struct dwarf2_per_cu_data
*
2924 dw2_get_cutu (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2927 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2929 index
-= dwarf2_per_objfile
->n_comp_units
;
2930 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2931 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2934 return dwarf2_per_objfile
->all_comp_units
[index
];
2937 /* Return the CU given its index.
2938 This differs from dw2_get_cutu in that it's for when you know INDEX
2941 static struct dwarf2_per_cu_data
*
2942 dw2_get_cu (struct dwarf2_per_objfile
*dwarf2_per_objfile
, int index
)
2944 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2946 return dwarf2_per_objfile
->all_comp_units
[index
];
2949 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2950 objfile_obstack, and constructed with the specified field
2953 static dwarf2_per_cu_data
*
2954 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2955 struct dwarf2_section_info
*section
,
2957 sect_offset sect_off
, ULONGEST length
)
2959 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2960 dwarf2_per_cu_data
*the_cu
2961 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2962 struct dwarf2_per_cu_data
);
2963 the_cu
->sect_off
= sect_off
;
2964 the_cu
->length
= length
;
2965 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2966 the_cu
->section
= section
;
2967 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2968 struct dwarf2_per_cu_quick_data
);
2969 the_cu
->is_dwz
= is_dwz
;
2973 /* A helper for create_cus_from_index that handles a given list of
2977 create_cus_from_index_list (struct objfile
*objfile
,
2978 const gdb_byte
*cu_list
, offset_type n_elements
,
2979 struct dwarf2_section_info
*section
,
2984 struct dwarf2_per_objfile
*dwarf2_per_objfile
2985 = get_dwarf2_per_objfile (objfile
);
2987 for (i
= 0; i
< n_elements
; i
+= 2)
2989 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2991 sect_offset sect_off
2992 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2993 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2996 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2]
2997 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
3002 /* Read the CU list from the mapped index, and use it to create all
3003 the CU objects for this objfile. */
3006 create_cus_from_index (struct objfile
*objfile
,
3007 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3008 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3010 struct dwz_file
*dwz
;
3011 struct dwarf2_per_objfile
*dwarf2_per_objfile
3012 = get_dwarf2_per_objfile (objfile
);
3014 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3015 dwarf2_per_objfile
->all_comp_units
=
3016 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3017 dwarf2_per_objfile
->n_comp_units
);
3019 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3020 &dwarf2_per_objfile
->info
, 0, 0);
3022 if (dwz_elements
== 0)
3025 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3026 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3027 cu_list_elements
/ 2);
3030 /* Create the signatured type hash table from the index. */
3033 create_signatured_type_table_from_index (struct objfile
*objfile
,
3034 struct dwarf2_section_info
*section
,
3035 const gdb_byte
*bytes
,
3036 offset_type elements
)
3039 htab_t sig_types_hash
;
3040 struct dwarf2_per_objfile
*dwarf2_per_objfile
3041 = get_dwarf2_per_objfile (objfile
);
3043 dwarf2_per_objfile
->n_type_units
3044 = dwarf2_per_objfile
->n_allocated_type_units
3046 dwarf2_per_objfile
->all_type_units
=
3047 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3049 sig_types_hash
= allocate_signatured_type_table (objfile
);
3051 for (i
= 0; i
< elements
; i
+= 3)
3053 struct signatured_type
*sig_type
;
3056 cu_offset type_offset_in_tu
;
3058 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3059 sect_offset sect_off
3060 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3062 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3064 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3067 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3068 struct signatured_type
);
3069 sig_type
->signature
= signature
;
3070 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3071 sig_type
->per_cu
.is_debug_types
= 1;
3072 sig_type
->per_cu
.section
= section
;
3073 sig_type
->per_cu
.sect_off
= sect_off
;
3074 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3075 sig_type
->per_cu
.v
.quick
3076 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3077 struct dwarf2_per_cu_quick_data
);
3079 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3082 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3085 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3088 /* Create the signatured type hash table from .debug_names. */
3091 create_signatured_type_table_from_debug_names
3092 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3093 const mapped_debug_names
&map
,
3094 struct dwarf2_section_info
*section
,
3095 struct dwarf2_section_info
*abbrev_section
)
3097 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3099 dwarf2_read_section (objfile
, section
);
3100 dwarf2_read_section (objfile
, abbrev_section
);
3102 dwarf2_per_objfile
->n_type_units
3103 = dwarf2_per_objfile
->n_allocated_type_units
3105 dwarf2_per_objfile
->all_type_units
3106 = XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3108 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3110 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3112 struct signatured_type
*sig_type
;
3115 cu_offset type_offset_in_tu
;
3117 sect_offset sect_off
3118 = (sect_offset
) (extract_unsigned_integer
3119 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3121 map
.dwarf5_byte_order
));
3123 comp_unit_head cu_header
;
3124 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3126 section
->buffer
+ to_underlying (sect_off
),
3129 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3130 struct signatured_type
);
3131 sig_type
->signature
= cu_header
.signature
;
3132 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3133 sig_type
->per_cu
.is_debug_types
= 1;
3134 sig_type
->per_cu
.section
= section
;
3135 sig_type
->per_cu
.sect_off
= sect_off
;
3136 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3137 sig_type
->per_cu
.v
.quick
3138 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3139 struct dwarf2_per_cu_quick_data
);
3141 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3144 dwarf2_per_objfile
->all_type_units
[i
] = sig_type
;
3147 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3150 /* Read the address map data from the mapped index, and use it to
3151 populate the objfile's psymtabs_addrmap. */
3154 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3155 struct mapped_index
*index
)
3157 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3158 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3159 const gdb_byte
*iter
, *end
;
3160 struct addrmap
*mutable_map
;
3163 auto_obstack temp_obstack
;
3165 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3167 iter
= index
->address_table
.data ();
3168 end
= iter
+ index
->address_table
.size ();
3170 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3174 ULONGEST hi
, lo
, cu_index
;
3175 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3177 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3179 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3184 complaint (&symfile_complaints
,
3185 _(".gdb_index address table has invalid range (%s - %s)"),
3186 hex_string (lo
), hex_string (hi
));
3190 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3192 complaint (&symfile_complaints
,
3193 _(".gdb_index address table has invalid CU number %u"),
3194 (unsigned) cu_index
);
3198 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3199 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3200 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3201 dw2_get_cutu (dwarf2_per_objfile
, cu_index
));
3204 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3205 &objfile
->objfile_obstack
);
3208 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3209 populate the objfile's psymtabs_addrmap. */
3212 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3213 struct dwarf2_section_info
*section
)
3215 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3216 bfd
*abfd
= objfile
->obfd
;
3217 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3218 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3219 SECT_OFF_TEXT (objfile
));
3221 auto_obstack temp_obstack
;
3222 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3224 std::unordered_map
<sect_offset
,
3225 dwarf2_per_cu_data
*,
3226 gdb::hash_enum
<sect_offset
>>
3227 debug_info_offset_to_per_cu
;
3228 for (int cui
= 0; cui
< dwarf2_per_objfile
->n_comp_units
; ++cui
)
3230 dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, cui
);
3231 const auto insertpair
3232 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3233 if (!insertpair
.second
)
3235 warning (_("Section .debug_aranges in %s has duplicate "
3236 "debug_info_offset %s, ignoring .debug_aranges."),
3237 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3242 dwarf2_read_section (objfile
, section
);
3244 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3246 const gdb_byte
*addr
= section
->buffer
;
3248 while (addr
< section
->buffer
+ section
->size
)
3250 const gdb_byte
*const entry_addr
= addr
;
3251 unsigned int bytes_read
;
3253 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3257 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3258 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3259 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3260 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3262 warning (_("Section .debug_aranges in %s entry at offset %zu "
3263 "length %s exceeds section length %s, "
3264 "ignoring .debug_aranges."),
3265 objfile_name (objfile
), entry_addr
- section
->buffer
,
3266 plongest (bytes_read
+ entry_length
),
3267 pulongest (section
->size
));
3271 /* The version number. */
3272 const uint16_t version
= read_2_bytes (abfd
, addr
);
3276 warning (_("Section .debug_aranges in %s entry at offset %zu "
3277 "has unsupported version %d, ignoring .debug_aranges."),
3278 objfile_name (objfile
), entry_addr
- section
->buffer
,
3283 const uint64_t debug_info_offset
3284 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3285 addr
+= offset_size
;
3286 const auto per_cu_it
3287 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3288 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3290 warning (_("Section .debug_aranges in %s entry at offset %zu "
3291 "debug_info_offset %s does not exists, "
3292 "ignoring .debug_aranges."),
3293 objfile_name (objfile
), entry_addr
- section
->buffer
,
3294 pulongest (debug_info_offset
));
3297 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3299 const uint8_t address_size
= *addr
++;
3300 if (address_size
< 1 || address_size
> 8)
3302 warning (_("Section .debug_aranges in %s entry at offset %zu "
3303 "address_size %u is invalid, ignoring .debug_aranges."),
3304 objfile_name (objfile
), entry_addr
- section
->buffer
,
3309 const uint8_t segment_selector_size
= *addr
++;
3310 if (segment_selector_size
!= 0)
3312 warning (_("Section .debug_aranges in %s entry at offset %zu "
3313 "segment_selector_size %u is not supported, "
3314 "ignoring .debug_aranges."),
3315 objfile_name (objfile
), entry_addr
- section
->buffer
,
3316 segment_selector_size
);
3320 /* Must pad to an alignment boundary that is twice the address
3321 size. It is undocumented by the DWARF standard but GCC does
3323 for (size_t padding
= ((-(addr
- section
->buffer
))
3324 & (2 * address_size
- 1));
3325 padding
> 0; padding
--)
3328 warning (_("Section .debug_aranges in %s entry at offset %zu "
3329 "padding is not zero, ignoring .debug_aranges."),
3330 objfile_name (objfile
), entry_addr
- section
->buffer
);
3336 if (addr
+ 2 * address_size
> entry_end
)
3338 warning (_("Section .debug_aranges in %s entry at offset %zu "
3339 "address list is not properly terminated, "
3340 "ignoring .debug_aranges."),
3341 objfile_name (objfile
), entry_addr
- section
->buffer
);
3344 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3346 addr
+= address_size
;
3347 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3349 addr
+= address_size
;
3350 if (start
== 0 && length
== 0)
3352 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3354 /* Symbol was eliminated due to a COMDAT group. */
3357 ULONGEST end
= start
+ length
;
3358 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3359 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3360 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3364 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3365 &objfile
->objfile_obstack
);
3368 /* Find a slot in the mapped index INDEX for the object named NAME.
3369 If NAME is found, set *VEC_OUT to point to the CU vector in the
3370 constant pool and return true. If NAME cannot be found, return
3374 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3375 offset_type
**vec_out
)
3378 offset_type slot
, step
;
3379 int (*cmp
) (const char *, const char *);
3381 gdb::unique_xmalloc_ptr
<char> without_params
;
3382 if (current_language
->la_language
== language_cplus
3383 || current_language
->la_language
== language_fortran
3384 || current_language
->la_language
== language_d
)
3386 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3389 if (strchr (name
, '(') != NULL
)
3391 without_params
= cp_remove_params (name
);
3393 if (without_params
!= NULL
)
3394 name
= without_params
.get ();
3398 /* Index version 4 did not support case insensitive searches. But the
3399 indices for case insensitive languages are built in lowercase, therefore
3400 simulate our NAME being searched is also lowercased. */
3401 hash
= mapped_index_string_hash ((index
->version
== 4
3402 && case_sensitivity
== case_sensitive_off
3403 ? 5 : index
->version
),
3406 slot
= hash
& (index
->symbol_table
.size () - 1);
3407 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3408 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3414 const auto &bucket
= index
->symbol_table
[slot
];
3415 if (bucket
.name
== 0 && bucket
.vec
== 0)
3418 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3419 if (!cmp (name
, str
))
3421 *vec_out
= (offset_type
*) (index
->constant_pool
3422 + MAYBE_SWAP (bucket
.vec
));
3426 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3430 /* A helper function that reads the .gdb_index from SECTION and fills
3431 in MAP. FILENAME is the name of the file containing the section;
3432 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3433 ok to use deprecated sections.
3435 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3436 out parameters that are filled in with information about the CU and
3437 TU lists in the section.
3439 Returns 1 if all went well, 0 otherwise. */
3442 read_index_from_section (struct objfile
*objfile
,
3443 const char *filename
,
3445 struct dwarf2_section_info
*section
,
3446 struct mapped_index
*map
,
3447 const gdb_byte
**cu_list
,
3448 offset_type
*cu_list_elements
,
3449 const gdb_byte
**types_list
,
3450 offset_type
*types_list_elements
)
3452 const gdb_byte
*addr
;
3453 offset_type version
;
3454 offset_type
*metadata
;
3457 if (dwarf2_section_empty_p (section
))
3460 /* Older elfutils strip versions could keep the section in the main
3461 executable while splitting it for the separate debug info file. */
3462 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3465 dwarf2_read_section (objfile
, section
);
3467 addr
= section
->buffer
;
3468 /* Version check. */
3469 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3470 /* Versions earlier than 3 emitted every copy of a psymbol. This
3471 causes the index to behave very poorly for certain requests. Version 3
3472 contained incomplete addrmap. So, it seems better to just ignore such
3476 static int warning_printed
= 0;
3477 if (!warning_printed
)
3479 warning (_("Skipping obsolete .gdb_index section in %s."),
3481 warning_printed
= 1;
3485 /* Index version 4 uses a different hash function than index version
3488 Versions earlier than 6 did not emit psymbols for inlined
3489 functions. Using these files will cause GDB not to be able to
3490 set breakpoints on inlined functions by name, so we ignore these
3491 indices unless the user has done
3492 "set use-deprecated-index-sections on". */
3493 if (version
< 6 && !deprecated_ok
)
3495 static int warning_printed
= 0;
3496 if (!warning_printed
)
3499 Skipping deprecated .gdb_index section in %s.\n\
3500 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3501 to use the section anyway."),
3503 warning_printed
= 1;
3507 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3508 of the TU (for symbols coming from TUs),
3509 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3510 Plus gold-generated indices can have duplicate entries for global symbols,
3511 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3512 These are just performance bugs, and we can't distinguish gdb-generated
3513 indices from gold-generated ones, so issue no warning here. */
3515 /* Indexes with higher version than the one supported by GDB may be no
3516 longer backward compatible. */
3520 map
->version
= version
;
3521 map
->total_size
= section
->size
;
3523 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3526 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3527 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3531 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3532 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3533 - MAYBE_SWAP (metadata
[i
]))
3537 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3538 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3540 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3543 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3544 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3546 = gdb::array_view
<mapped_index::symbol_table_slot
>
3547 ((mapped_index::symbol_table_slot
*) symbol_table
,
3548 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3551 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3556 /* Read .gdb_index. If everything went ok, initialize the "quick"
3557 elements of all the CUs and return 1. Otherwise, return 0. */
3560 dwarf2_read_index (struct objfile
*objfile
)
3562 struct mapped_index local_map
, *map
;
3563 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3564 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3565 struct dwz_file
*dwz
;
3566 struct dwarf2_per_objfile
*dwarf2_per_objfile
3567 = get_dwarf2_per_objfile (objfile
);
3569 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3570 use_deprecated_index_sections
,
3571 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3572 &cu_list
, &cu_list_elements
,
3573 &types_list
, &types_list_elements
))
3576 /* Don't use the index if it's empty. */
3577 if (local_map
.symbol_table
.empty ())
3580 /* If there is a .dwz file, read it so we can get its CU list as
3582 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3585 struct mapped_index dwz_map
;
3586 const gdb_byte
*dwz_types_ignore
;
3587 offset_type dwz_types_elements_ignore
;
3589 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3591 &dwz
->gdb_index
, &dwz_map
,
3592 &dwz_list
, &dwz_list_elements
,
3594 &dwz_types_elements_ignore
))
3596 warning (_("could not read '.gdb_index' section from %s; skipping"),
3597 bfd_get_filename (dwz
->dwz_bfd
));
3602 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3605 if (types_list_elements
)
3607 struct dwarf2_section_info
*section
;
3609 /* We can only handle a single .debug_types when we have an
3611 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3614 section
= VEC_index (dwarf2_section_info_def
,
3615 dwarf2_per_objfile
->types
, 0);
3617 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3618 types_list_elements
);
3621 create_addrmap_from_index (dwarf2_per_objfile
, &local_map
);
3623 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3624 map
= new (map
) mapped_index ();
3627 dwarf2_per_objfile
->index_table
= map
;
3628 dwarf2_per_objfile
->using_index
= 1;
3629 dwarf2_per_objfile
->quick_file_names_table
=
3630 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3635 /* die_reader_func for dw2_get_file_names. */
3638 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3639 const gdb_byte
*info_ptr
,
3640 struct die_info
*comp_unit_die
,
3644 struct dwarf2_cu
*cu
= reader
->cu
;
3645 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3646 struct dwarf2_per_objfile
*dwarf2_per_objfile
3647 = cu
->per_cu
->dwarf2_per_objfile
;
3648 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3649 struct dwarf2_per_cu_data
*lh_cu
;
3650 struct attribute
*attr
;
3653 struct quick_file_names
*qfn
;
3655 gdb_assert (! this_cu
->is_debug_types
);
3657 /* Our callers never want to match partial units -- instead they
3658 will match the enclosing full CU. */
3659 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3661 this_cu
->v
.quick
->no_file_data
= 1;
3669 sect_offset line_offset
{};
3671 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3674 struct quick_file_names find_entry
;
3676 line_offset
= (sect_offset
) DW_UNSND (attr
);
3678 /* We may have already read in this line header (TU line header sharing).
3679 If we have we're done. */
3680 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3681 find_entry
.hash
.line_sect_off
= line_offset
;
3682 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3683 &find_entry
, INSERT
);
3686 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3690 lh
= dwarf_decode_line_header (line_offset
, cu
);
3694 lh_cu
->v
.quick
->no_file_data
= 1;
3698 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3699 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3700 qfn
->hash
.line_sect_off
= line_offset
;
3701 gdb_assert (slot
!= NULL
);
3704 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3706 qfn
->num_file_names
= lh
->file_names
.size ();
3708 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3709 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3710 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3711 qfn
->real_names
= NULL
;
3713 lh_cu
->v
.quick
->file_names
= qfn
;
3716 /* A helper for the "quick" functions which attempts to read the line
3717 table for THIS_CU. */
3719 static struct quick_file_names
*
3720 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3722 /* This should never be called for TUs. */
3723 gdb_assert (! this_cu
->is_debug_types
);
3724 /* Nor type unit groups. */
3725 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3727 if (this_cu
->v
.quick
->file_names
!= NULL
)
3728 return this_cu
->v
.quick
->file_names
;
3729 /* If we know there is no line data, no point in looking again. */
3730 if (this_cu
->v
.quick
->no_file_data
)
3733 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3735 if (this_cu
->v
.quick
->no_file_data
)
3737 return this_cu
->v
.quick
->file_names
;
3740 /* A helper for the "quick" functions which computes and caches the
3741 real path for a given file name from the line table. */
3744 dw2_get_real_path (struct objfile
*objfile
,
3745 struct quick_file_names
*qfn
, int index
)
3747 if (qfn
->real_names
== NULL
)
3748 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3749 qfn
->num_file_names
, const char *);
3751 if (qfn
->real_names
[index
] == NULL
)
3752 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3754 return qfn
->real_names
[index
];
3757 static struct symtab
*
3758 dw2_find_last_source_symtab (struct objfile
*objfile
)
3760 struct dwarf2_per_objfile
*dwarf2_per_objfile
3761 = get_dwarf2_per_objfile (objfile
);
3762 int index
= dwarf2_per_objfile
->n_comp_units
- 1;
3763 dwarf2_per_cu_data
*dwarf_cu
= dw2_get_cutu (dwarf2_per_objfile
, index
);
3764 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
);
3769 return compunit_primary_filetab (cust
);
3772 /* Traversal function for dw2_forget_cached_source_info. */
3775 dw2_free_cached_file_names (void **slot
, void *info
)
3777 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3779 if (file_data
->real_names
)
3783 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3785 xfree ((void*) file_data
->real_names
[i
]);
3786 file_data
->real_names
[i
] = NULL
;
3794 dw2_forget_cached_source_info (struct objfile
*objfile
)
3796 struct dwarf2_per_objfile
*dwarf2_per_objfile
3797 = get_dwarf2_per_objfile (objfile
);
3799 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3800 dw2_free_cached_file_names
, NULL
);
3803 /* Helper function for dw2_map_symtabs_matching_filename that expands
3804 the symtabs and calls the iterator. */
3807 dw2_map_expand_apply (struct objfile
*objfile
,
3808 struct dwarf2_per_cu_data
*per_cu
,
3809 const char *name
, const char *real_path
,
3810 gdb::function_view
<bool (symtab
*)> callback
)
3812 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3814 /* Don't visit already-expanded CUs. */
3815 if (per_cu
->v
.quick
->compunit_symtab
)
3818 /* This may expand more than one symtab, and we want to iterate over
3820 dw2_instantiate_symtab (per_cu
);
3822 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3823 last_made
, callback
);
3826 /* Implementation of the map_symtabs_matching_filename method. */
3829 dw2_map_symtabs_matching_filename
3830 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3831 gdb::function_view
<bool (symtab
*)> callback
)
3834 const char *name_basename
= lbasename (name
);
3835 struct dwarf2_per_objfile
*dwarf2_per_objfile
3836 = get_dwarf2_per_objfile (objfile
);
3838 /* The rule is CUs specify all the files, including those used by
3839 any TU, so there's no need to scan TUs here. */
3841 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3844 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (dwarf2_per_objfile
, i
);
3845 struct quick_file_names
*file_data
;
3847 /* We only need to look at symtabs not already expanded. */
3848 if (per_cu
->v
.quick
->compunit_symtab
)
3851 file_data
= dw2_get_file_names (per_cu
);
3852 if (file_data
== NULL
)
3855 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3857 const char *this_name
= file_data
->file_names
[j
];
3858 const char *this_real_name
;
3860 if (compare_filenames_for_search (this_name
, name
))
3862 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3868 /* Before we invoke realpath, which can get expensive when many
3869 files are involved, do a quick comparison of the basenames. */
3870 if (! basenames_may_differ
3871 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3874 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3875 if (compare_filenames_for_search (this_real_name
, name
))
3877 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3883 if (real_path
!= NULL
)
3885 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3886 gdb_assert (IS_ABSOLUTE_PATH (name
));
3887 if (this_real_name
!= NULL
3888 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3890 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3902 /* Struct used to manage iterating over all CUs looking for a symbol. */
3904 struct dw2_symtab_iterator
3906 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3907 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3908 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3909 int want_specific_block
;
3910 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3911 Unused if !WANT_SPECIFIC_BLOCK. */
3913 /* The kind of symbol we're looking for. */
3915 /* The list of CUs from the index entry of the symbol,
3916 or NULL if not found. */
3918 /* The next element in VEC to look at. */
3920 /* The number of elements in VEC, or zero if there is no match. */
3922 /* Have we seen a global version of the symbol?
3923 If so we can ignore all further global instances.
3924 This is to work around gold/15646, inefficient gold-generated
3929 /* Initialize the index symtab iterator ITER.
3930 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3931 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3934 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3935 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3936 int want_specific_block
,
3941 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3942 iter
->want_specific_block
= want_specific_block
;
3943 iter
->block_index
= block_index
;
3944 iter
->domain
= domain
;
3946 iter
->global_seen
= 0;
3948 mapped_index
*index
= dwarf2_per_objfile
->index_table
;
3950 /* index is NULL if OBJF_READNOW. */
3951 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3952 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3960 /* Return the next matching CU or NULL if there are no more. */
3962 static struct dwarf2_per_cu_data
*
3963 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3965 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3967 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3969 offset_type cu_index_and_attrs
=
3970 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3971 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3972 struct dwarf2_per_cu_data
*per_cu
;
3973 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3974 /* This value is only valid for index versions >= 7. */
3975 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3976 gdb_index_symbol_kind symbol_kind
=
3977 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3978 /* Only check the symbol attributes if they're present.
3979 Indices prior to version 7 don't record them,
3980 and indices >= 7 may elide them for certain symbols
3981 (gold does this). */
3983 (dwarf2_per_objfile
->index_table
->version
>= 7
3984 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3986 /* Don't crash on bad data. */
3987 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3988 + dwarf2_per_objfile
->n_type_units
))
3990 complaint (&symfile_complaints
,
3991 _(".gdb_index entry has bad CU index"
3993 objfile_name (dwarf2_per_objfile
->objfile
));
3997 per_cu
= dw2_get_cutu (dwarf2_per_objfile
, cu_index
);
3999 /* Skip if already read in. */
4000 if (per_cu
->v
.quick
->compunit_symtab
)
4003 /* Check static vs global. */
4006 if (iter
->want_specific_block
4007 && want_static
!= is_static
)
4009 /* Work around gold/15646. */
4010 if (!is_static
&& iter
->global_seen
)
4013 iter
->global_seen
= 1;
4016 /* Only check the symbol's kind if it has one. */
4019 switch (iter
->domain
)
4022 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4023 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4024 /* Some types are also in VAR_DOMAIN. */
4025 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4029 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4033 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4048 static struct compunit_symtab
*
4049 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4050 const char *name
, domain_enum domain
)
4052 struct compunit_symtab
*stab_best
= NULL
;
4053 struct dwarf2_per_objfile
*dwarf2_per_objfile
4054 = get_dwarf2_per_objfile (objfile
);
4056 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4058 struct dw2_symtab_iterator iter
;
4059 struct dwarf2_per_cu_data
*per_cu
;
4061 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4063 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4065 struct symbol
*sym
, *with_opaque
= NULL
;
4066 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
4067 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4068 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4070 sym
= block_find_symbol (block
, name
, domain
,
4071 block_find_non_opaque_type_preferred
,
4074 /* Some caution must be observed with overloaded functions
4075 and methods, since the index will not contain any overload
4076 information (but NAME might contain it). */
4079 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4081 if (with_opaque
!= NULL
4082 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4085 /* Keep looking through other CUs. */
4092 dw2_print_stats (struct objfile
*objfile
)
4094 struct dwarf2_per_objfile
*dwarf2_per_objfile
4095 = get_dwarf2_per_objfile (objfile
);
4096 int total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
4099 for (int i
= 0; i
< total
; ++i
)
4101 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
4103 if (!per_cu
->v
.quick
->compunit_symtab
)
4106 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4107 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4110 /* This dumps minimal information about the index.
4111 It is called via "mt print objfiles".
4112 One use is to verify .gdb_index has been loaded by the
4113 gdb.dwarf2/gdb-index.exp testcase. */
4116 dw2_dump (struct objfile
*objfile
)
4118 struct dwarf2_per_objfile
*dwarf2_per_objfile
4119 = get_dwarf2_per_objfile (objfile
);
4121 gdb_assert (dwarf2_per_objfile
->using_index
);
4122 printf_filtered (".gdb_index:");
4123 if (dwarf2_per_objfile
->index_table
!= NULL
)
4125 printf_filtered (" version %d\n",
4126 dwarf2_per_objfile
->index_table
->version
);
4129 printf_filtered (" faked for \"readnow\"\n");
4130 printf_filtered ("\n");
4134 dw2_relocate (struct objfile
*objfile
,
4135 const struct section_offsets
*new_offsets
,
4136 const struct section_offsets
*delta
)
4138 /* There's nothing to relocate here. */
4142 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4143 const char *func_name
)
4145 struct dwarf2_per_objfile
*dwarf2_per_objfile
4146 = get_dwarf2_per_objfile (objfile
);
4148 struct dw2_symtab_iterator iter
;
4149 struct dwarf2_per_cu_data
*per_cu
;
4151 /* Note: It doesn't matter what we pass for block_index here. */
4152 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4155 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4156 dw2_instantiate_symtab (per_cu
);
4161 dw2_expand_all_symtabs (struct objfile
*objfile
)
4163 struct dwarf2_per_objfile
*dwarf2_per_objfile
4164 = get_dwarf2_per_objfile (objfile
);
4165 int total_units
= (dwarf2_per_objfile
->n_comp_units
4166 + dwarf2_per_objfile
->n_type_units
);
4168 for (int i
= 0; i
< total_units
; ++i
)
4170 struct dwarf2_per_cu_data
*per_cu
4171 = dw2_get_cutu (dwarf2_per_objfile
, i
);
4173 dw2_instantiate_symtab (per_cu
);
4178 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4179 const char *fullname
)
4181 struct dwarf2_per_objfile
*dwarf2_per_objfile
4182 = get_dwarf2_per_objfile (objfile
);
4184 /* We don't need to consider type units here.
4185 This is only called for examining code, e.g. expand_line_sal.
4186 There can be an order of magnitude (or more) more type units
4187 than comp units, and we avoid them if we can. */
4189 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4192 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
4193 struct quick_file_names
*file_data
;
4195 /* We only need to look at symtabs not already expanded. */
4196 if (per_cu
->v
.quick
->compunit_symtab
)
4199 file_data
= dw2_get_file_names (per_cu
);
4200 if (file_data
== NULL
)
4203 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4205 const char *this_fullname
= file_data
->file_names
[j
];
4207 if (filename_cmp (this_fullname
, fullname
) == 0)
4209 dw2_instantiate_symtab (per_cu
);
4217 dw2_map_matching_symbols (struct objfile
*objfile
,
4218 const char * name
, domain_enum domain
,
4220 int (*callback
) (struct block
*,
4221 struct symbol
*, void *),
4222 void *data
, symbol_name_match_type match
,
4223 symbol_compare_ftype
*ordered_compare
)
4225 /* Currently unimplemented; used for Ada. The function can be called if the
4226 current language is Ada for a non-Ada objfile using GNU index. As Ada
4227 does not look for non-Ada symbols this function should just return. */
4230 /* Symbol name matcher for .gdb_index names.
4232 Symbol names in .gdb_index have a few particularities:
4234 - There's no indication of which is the language of each symbol.
4236 Since each language has its own symbol name matching algorithm,
4237 and we don't know which language is the right one, we must match
4238 each symbol against all languages. This would be a potential
4239 performance problem if it were not mitigated by the
4240 mapped_index::name_components lookup table, which significantly
4241 reduces the number of times we need to call into this matcher,
4242 making it a non-issue.
4244 - Symbol names in the index have no overload (parameter)
4245 information. I.e., in C++, "foo(int)" and "foo(long)" both
4246 appear as "foo" in the index, for example.
4248 This means that the lookup names passed to the symbol name
4249 matcher functions must have no parameter information either
4250 because (e.g.) symbol search name "foo" does not match
4251 lookup-name "foo(int)" [while swapping search name for lookup
4254 class gdb_index_symbol_name_matcher
4257 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4258 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4260 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4261 Returns true if any matcher matches. */
4262 bool matches (const char *symbol_name
);
4265 /* A reference to the lookup name we're matching against. */
4266 const lookup_name_info
&m_lookup_name
;
4268 /* A vector holding all the different symbol name matchers, for all
4270 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4273 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4274 (const lookup_name_info
&lookup_name
)
4275 : m_lookup_name (lookup_name
)
4277 /* Prepare the vector of comparison functions upfront, to avoid
4278 doing the same work for each symbol. Care is taken to avoid
4279 matching with the same matcher more than once if/when multiple
4280 languages use the same matcher function. */
4281 auto &matchers
= m_symbol_name_matcher_funcs
;
4282 matchers
.reserve (nr_languages
);
4284 matchers
.push_back (default_symbol_name_matcher
);
4286 for (int i
= 0; i
< nr_languages
; i
++)
4288 const language_defn
*lang
= language_def ((enum language
) i
);
4289 symbol_name_matcher_ftype
*name_matcher
4290 = get_symbol_name_matcher (lang
, m_lookup_name
);
4292 /* Don't insert the same comparison routine more than once.
4293 Note that we do this linear walk instead of a seemingly
4294 cheaper sorted insert, or use a std::set or something like
4295 that, because relative order of function addresses is not
4296 stable. This is not a problem in practice because the number
4297 of supported languages is low, and the cost here is tiny
4298 compared to the number of searches we'll do afterwards using
4300 if (name_matcher
!= default_symbol_name_matcher
4301 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4302 == matchers
.end ()))
4303 matchers
.push_back (name_matcher
);
4308 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4310 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4311 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4317 /* Starting from a search name, return the string that finds the upper
4318 bound of all strings that start with SEARCH_NAME in a sorted name
4319 list. Returns the empty string to indicate that the upper bound is
4320 the end of the list. */
4323 make_sort_after_prefix_name (const char *search_name
)
4325 /* When looking to complete "func", we find the upper bound of all
4326 symbols that start with "func" by looking for where we'd insert
4327 the closest string that would follow "func" in lexicographical
4328 order. Usually, that's "func"-with-last-character-incremented,
4329 i.e. "fund". Mind non-ASCII characters, though. Usually those
4330 will be UTF-8 multi-byte sequences, but we can't be certain.
4331 Especially mind the 0xff character, which is a valid character in
4332 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4333 rule out compilers allowing it in identifiers. Note that
4334 conveniently, strcmp/strcasecmp are specified to compare
4335 characters interpreted as unsigned char. So what we do is treat
4336 the whole string as a base 256 number composed of a sequence of
4337 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4338 to 0, and carries 1 to the following more-significant position.
4339 If the very first character in SEARCH_NAME ends up incremented
4340 and carries/overflows, then the upper bound is the end of the
4341 list. The string after the empty string is also the empty
4344 Some examples of this operation:
4346 SEARCH_NAME => "+1" RESULT
4350 "\xff" "a" "\xff" => "\xff" "b"
4355 Then, with these symbols for example:
4361 completing "func" looks for symbols between "func" and
4362 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4363 which finds "func" and "func1", but not "fund".
4367 funcÿ (Latin1 'ÿ' [0xff])
4371 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4372 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4376 ÿÿ (Latin1 'ÿ' [0xff])
4379 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4380 the end of the list.
4382 std::string after
= search_name
;
4383 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4385 if (!after
.empty ())
4386 after
.back () = (unsigned char) after
.back () + 1;
4390 /* See declaration. */
4392 std::pair
<std::vector
<name_component
>::const_iterator
,
4393 std::vector
<name_component
>::const_iterator
>
4394 mapped_index_base::find_name_components_bounds
4395 (const lookup_name_info
&lookup_name_without_params
) const
4398 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4401 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4403 /* Comparison function object for lower_bound that matches against a
4404 given symbol name. */
4405 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4408 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4409 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4410 return name_cmp (elem_name
, name
) < 0;
4413 /* Comparison function object for upper_bound that matches against a
4414 given symbol name. */
4415 auto lookup_compare_upper
= [&] (const char *name
,
4416 const name_component
&elem
)
4418 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4419 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4420 return name_cmp (name
, elem_name
) < 0;
4423 auto begin
= this->name_components
.begin ();
4424 auto end
= this->name_components
.end ();
4426 /* Find the lower bound. */
4429 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4432 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4435 /* Find the upper bound. */
4438 if (lookup_name_without_params
.completion_mode ())
4440 /* In completion mode, we want UPPER to point past all
4441 symbols names that have the same prefix. I.e., with
4442 these symbols, and completing "func":
4444 function << lower bound
4446 other_function << upper bound
4448 We find the upper bound by looking for the insertion
4449 point of "func"-with-last-character-incremented,
4451 std::string after
= make_sort_after_prefix_name (cplus
);
4454 return std::lower_bound (lower
, end
, after
.c_str (),
4455 lookup_compare_lower
);
4458 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4461 return {lower
, upper
};
4464 /* See declaration. */
4467 mapped_index_base::build_name_components ()
4469 if (!this->name_components
.empty ())
4472 this->name_components_casing
= case_sensitivity
;
4474 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4476 /* The code below only knows how to break apart components of C++
4477 symbol names (and other languages that use '::' as
4478 namespace/module separator). If we add support for wild matching
4479 to some language that uses some other operator (E.g., Ada, Go and
4480 D use '.'), then we'll need to try splitting the symbol name
4481 according to that language too. Note that Ada does support wild
4482 matching, but doesn't currently support .gdb_index. */
4483 auto count
= this->symbol_name_count ();
4484 for (offset_type idx
= 0; idx
< count
; idx
++)
4486 if (this->symbol_name_slot_invalid (idx
))
4489 const char *name
= this->symbol_name_at (idx
);
4491 /* Add each name component to the name component table. */
4492 unsigned int previous_len
= 0;
4493 for (unsigned int current_len
= cp_find_first_component (name
);
4494 name
[current_len
] != '\0';
4495 current_len
+= cp_find_first_component (name
+ current_len
))
4497 gdb_assert (name
[current_len
] == ':');
4498 this->name_components
.push_back ({previous_len
, idx
});
4499 /* Skip the '::'. */
4501 previous_len
= current_len
;
4503 this->name_components
.push_back ({previous_len
, idx
});
4506 /* Sort name_components elements by name. */
4507 auto name_comp_compare
= [&] (const name_component
&left
,
4508 const name_component
&right
)
4510 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4511 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4513 const char *left_name
= left_qualified
+ left
.name_offset
;
4514 const char *right_name
= right_qualified
+ right
.name_offset
;
4516 return name_cmp (left_name
, right_name
) < 0;
4519 std::sort (this->name_components
.begin (),
4520 this->name_components
.end (),
4524 /* Helper for dw2_expand_symtabs_matching that works with a
4525 mapped_index_base instead of the containing objfile. This is split
4526 to a separate function in order to be able to unit test the
4527 name_components matching using a mock mapped_index_base. For each
4528 symbol name that matches, calls MATCH_CALLBACK, passing it the
4529 symbol's index in the mapped_index_base symbol table. */
4532 dw2_expand_symtabs_matching_symbol
4533 (mapped_index_base
&index
,
4534 const lookup_name_info
&lookup_name_in
,
4535 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4536 enum search_domain kind
,
4537 gdb::function_view
<void (offset_type
)> match_callback
)
4539 lookup_name_info lookup_name_without_params
4540 = lookup_name_in
.make_ignore_params ();
4541 gdb_index_symbol_name_matcher lookup_name_matcher
4542 (lookup_name_without_params
);
4544 /* Build the symbol name component sorted vector, if we haven't
4546 index
.build_name_components ();
4548 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4550 /* Now for each symbol name in range, check to see if we have a name
4551 match, and if so, call the MATCH_CALLBACK callback. */
4553 /* The same symbol may appear more than once in the range though.
4554 E.g., if we're looking for symbols that complete "w", and we have
4555 a symbol named "w1::w2", we'll find the two name components for
4556 that same symbol in the range. To be sure we only call the
4557 callback once per symbol, we first collect the symbol name
4558 indexes that matched in a temporary vector and ignore
4560 std::vector
<offset_type
> matches
;
4561 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4563 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4565 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4567 if (!lookup_name_matcher
.matches (qualified
)
4568 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4571 matches
.push_back (bounds
.first
->idx
);
4574 std::sort (matches
.begin (), matches
.end ());
4576 /* Finally call the callback, once per match. */
4578 for (offset_type idx
: matches
)
4582 match_callback (idx
);
4587 /* Above we use a type wider than idx's for 'prev', since 0 and
4588 (offset_type)-1 are both possible values. */
4589 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4594 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4596 /* A mock .gdb_index/.debug_names-like name index table, enough to
4597 exercise dw2_expand_symtabs_matching_symbol, which works with the
4598 mapped_index_base interface. Builds an index from the symbol list
4599 passed as parameter to the constructor. */
4600 class mock_mapped_index
: public mapped_index_base
4603 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4604 : m_symbol_table (symbols
)
4607 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4609 /* Return the number of names in the symbol table. */
4610 virtual size_t symbol_name_count () const
4612 return m_symbol_table
.size ();
4615 /* Get the name of the symbol at IDX in the symbol table. */
4616 virtual const char *symbol_name_at (offset_type idx
) const
4618 return m_symbol_table
[idx
];
4622 gdb::array_view
<const char *> m_symbol_table
;
4625 /* Convenience function that converts a NULL pointer to a "<null>"
4626 string, to pass to print routines. */
4629 string_or_null (const char *str
)
4631 return str
!= NULL
? str
: "<null>";
4634 /* Check if a lookup_name_info built from
4635 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4636 index. EXPECTED_LIST is the list of expected matches, in expected
4637 matching order. If no match expected, then an empty list is
4638 specified. Returns true on success. On failure prints a warning
4639 indicating the file:line that failed, and returns false. */
4642 check_match (const char *file
, int line
,
4643 mock_mapped_index
&mock_index
,
4644 const char *name
, symbol_name_match_type match_type
,
4645 bool completion_mode
,
4646 std::initializer_list
<const char *> expected_list
)
4648 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4650 bool matched
= true;
4652 auto mismatch
= [&] (const char *expected_str
,
4655 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4656 "expected=\"%s\", got=\"%s\"\n"),
4658 (match_type
== symbol_name_match_type::FULL
4660 name
, string_or_null (expected_str
), string_or_null (got
));
4664 auto expected_it
= expected_list
.begin ();
4665 auto expected_end
= expected_list
.end ();
4667 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4669 [&] (offset_type idx
)
4671 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4672 const char *expected_str
4673 = expected_it
== expected_end
? NULL
: *expected_it
++;
4675 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4676 mismatch (expected_str
, matched_name
);
4679 const char *expected_str
4680 = expected_it
== expected_end
? NULL
: *expected_it
++;
4681 if (expected_str
!= NULL
)
4682 mismatch (expected_str
, NULL
);
4687 /* The symbols added to the mock mapped_index for testing (in
4689 static const char *test_symbols
[] = {
4698 "ns2::tmpl<int>::foo2",
4699 "(anonymous namespace)::A::B::C",
4701 /* These are used to check that the increment-last-char in the
4702 matching algorithm for completion doesn't match "t1_fund" when
4703 completing "t1_func". */
4709 /* A UTF-8 name with multi-byte sequences to make sure that
4710 cp-name-parser understands this as a single identifier ("função"
4711 is "function" in PT). */
4714 /* \377 (0xff) is Latin1 'ÿ'. */
4717 /* \377 (0xff) is Latin1 'ÿ'. */
4721 /* A name with all sorts of complications. Starts with "z" to make
4722 it easier for the completion tests below. */
4723 #define Z_SYM_NAME \
4724 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4725 "::tuple<(anonymous namespace)::ui*, " \
4726 "std::default_delete<(anonymous namespace)::ui>, void>"
4731 /* Returns true if the mapped_index_base::find_name_component_bounds
4732 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4733 in completion mode. */
4736 check_find_bounds_finds (mapped_index_base
&index
,
4737 const char *search_name
,
4738 gdb::array_view
<const char *> expected_syms
)
4740 lookup_name_info
lookup_name (search_name
,
4741 symbol_name_match_type::FULL
, true);
4743 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4745 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4746 if (distance
!= expected_syms
.size ())
4749 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4751 auto nc_elem
= bounds
.first
+ exp_elem
;
4752 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4753 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4760 /* Test the lower-level mapped_index::find_name_component_bounds
4764 test_mapped_index_find_name_component_bounds ()
4766 mock_mapped_index
mock_index (test_symbols
);
4768 mock_index
.build_name_components ();
4770 /* Test the lower-level mapped_index::find_name_component_bounds
4771 method in completion mode. */
4773 static const char *expected_syms
[] = {
4778 SELF_CHECK (check_find_bounds_finds (mock_index
,
4779 "t1_func", expected_syms
));
4782 /* Check that the increment-last-char in the name matching algorithm
4783 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4785 static const char *expected_syms1
[] = {
4789 SELF_CHECK (check_find_bounds_finds (mock_index
,
4790 "\377", expected_syms1
));
4792 static const char *expected_syms2
[] = {
4795 SELF_CHECK (check_find_bounds_finds (mock_index
,
4796 "\377\377", expected_syms2
));
4800 /* Test dw2_expand_symtabs_matching_symbol. */
4803 test_dw2_expand_symtabs_matching_symbol ()
4805 mock_mapped_index
mock_index (test_symbols
);
4807 /* We let all tests run until the end even if some fails, for debug
4809 bool any_mismatch
= false;
4811 /* Create the expected symbols list (an initializer_list). Needed
4812 because lists have commas, and we need to pass them to CHECK,
4813 which is a macro. */
4814 #define EXPECT(...) { __VA_ARGS__ }
4816 /* Wrapper for check_match that passes down the current
4817 __FILE__/__LINE__. */
4818 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4819 any_mismatch |= !check_match (__FILE__, __LINE__, \
4821 NAME, MATCH_TYPE, COMPLETION_MODE, \
4824 /* Identity checks. */
4825 for (const char *sym
: test_symbols
)
4827 /* Should be able to match all existing symbols. */
4828 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4831 /* Should be able to match all existing symbols with
4833 std::string with_params
= std::string (sym
) + "(int)";
4834 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4837 /* Should be able to match all existing symbols with
4838 parameters and qualifiers. */
4839 with_params
= std::string (sym
) + " ( int ) const";
4840 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4843 /* This should really find sym, but cp-name-parser.y doesn't
4844 know about lvalue/rvalue qualifiers yet. */
4845 with_params
= std::string (sym
) + " ( int ) &&";
4846 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4850 /* Check that the name matching algorithm for completion doesn't get
4851 confused with Latin1 'ÿ' / 0xff. */
4853 static const char str
[] = "\377";
4854 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4855 EXPECT ("\377", "\377\377123"));
4858 /* Check that the increment-last-char in the matching algorithm for
4859 completion doesn't match "t1_fund" when completing "t1_func". */
4861 static const char str
[] = "t1_func";
4862 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4863 EXPECT ("t1_func", "t1_func1"));
4866 /* Check that completion mode works at each prefix of the expected
4869 static const char str
[] = "function(int)";
4870 size_t len
= strlen (str
);
4873 for (size_t i
= 1; i
< len
; i
++)
4875 lookup
.assign (str
, i
);
4876 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4877 EXPECT ("function"));
4881 /* While "w" is a prefix of both components, the match function
4882 should still only be called once. */
4884 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4886 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4890 /* Same, with a "complicated" symbol. */
4892 static const char str
[] = Z_SYM_NAME
;
4893 size_t len
= strlen (str
);
4896 for (size_t i
= 1; i
< len
; i
++)
4898 lookup
.assign (str
, i
);
4899 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4900 EXPECT (Z_SYM_NAME
));
4904 /* In FULL mode, an incomplete symbol doesn't match. */
4906 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4910 /* A complete symbol with parameters matches any overload, since the
4911 index has no overload info. */
4913 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4914 EXPECT ("std::zfunction", "std::zfunction2"));
4915 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4916 EXPECT ("std::zfunction", "std::zfunction2"));
4917 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4918 EXPECT ("std::zfunction", "std::zfunction2"));
4921 /* Check that whitespace is ignored appropriately. A symbol with a
4922 template argument list. */
4924 static const char expected
[] = "ns::foo<int>";
4925 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4927 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4931 /* Check that whitespace is ignored appropriately. A symbol with a
4932 template argument list that includes a pointer. */
4934 static const char expected
[] = "ns::foo<char*>";
4935 /* Try both completion and non-completion modes. */
4936 static const bool completion_mode
[2] = {false, true};
4937 for (size_t i
= 0; i
< 2; i
++)
4939 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4940 completion_mode
[i
], EXPECT (expected
));
4941 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4942 completion_mode
[i
], EXPECT (expected
));
4944 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4945 completion_mode
[i
], EXPECT (expected
));
4946 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4947 completion_mode
[i
], EXPECT (expected
));
4952 /* Check method qualifiers are ignored. */
4953 static const char expected
[] = "ns::foo<char*>";
4954 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4955 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4956 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4957 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4958 CHECK_MATCH ("foo < char * > ( int ) const",
4959 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4960 CHECK_MATCH ("foo < char * > ( int ) &&",
4961 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4964 /* Test lookup names that don't match anything. */
4966 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4969 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4973 /* Some wild matching tests, exercising "(anonymous namespace)",
4974 which should not be confused with a parameter list. */
4976 static const char *syms
[] = {
4980 "A :: B :: C ( int )",
4985 for (const char *s
: syms
)
4987 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4988 EXPECT ("(anonymous namespace)::A::B::C"));
4993 static const char expected
[] = "ns2::tmpl<int>::foo2";
4994 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4996 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
5000 SELF_CHECK (!any_mismatch
);
5009 test_mapped_index_find_name_component_bounds ();
5010 test_dw2_expand_symtabs_matching_symbol ();
5013 }} // namespace selftests::dw2_expand_symtabs_matching
5015 #endif /* GDB_SELF_TEST */
5017 /* If FILE_MATCHER is NULL or if PER_CU has
5018 dwarf2_per_cu_quick_data::MARK set (see
5019 dw_expand_symtabs_matching_file_matcher), expand the CU and call
5020 EXPANSION_NOTIFY on it. */
5023 dw2_expand_symtabs_matching_one
5024 (struct dwarf2_per_cu_data
*per_cu
,
5025 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5026 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
5028 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5030 bool symtab_was_null
5031 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5033 dw2_instantiate_symtab (per_cu
);
5035 if (expansion_notify
!= NULL
5037 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5038 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5042 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5043 matched, to expand corresponding CUs that were marked. IDX is the
5044 index of the symbol name that matched. */
5047 dw2_expand_marked_cus
5048 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5049 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5050 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5053 offset_type
*vec
, vec_len
, vec_idx
;
5054 bool global_seen
= false;
5055 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5057 vec
= (offset_type
*) (index
.constant_pool
5058 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5059 vec_len
= MAYBE_SWAP (vec
[0]);
5060 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5062 struct dwarf2_per_cu_data
*per_cu
;
5063 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5064 /* This value is only valid for index versions >= 7. */
5065 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5066 gdb_index_symbol_kind symbol_kind
=
5067 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5068 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5069 /* Only check the symbol attributes if they're present.
5070 Indices prior to version 7 don't record them,
5071 and indices >= 7 may elide them for certain symbols
5072 (gold does this). */
5075 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5077 /* Work around gold/15646. */
5080 if (!is_static
&& global_seen
)
5086 /* Only check the symbol's kind if it has one. */
5091 case VARIABLES_DOMAIN
:
5092 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5095 case FUNCTIONS_DOMAIN
:
5096 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5100 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5108 /* Don't crash on bad data. */
5109 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
5110 + dwarf2_per_objfile
->n_type_units
))
5112 complaint (&symfile_complaints
,
5113 _(".gdb_index entry has bad CU index"
5115 objfile_name (dwarf2_per_objfile
->objfile
));
5119 per_cu
= dw2_get_cutu (dwarf2_per_objfile
, cu_index
);
5120 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5125 /* If FILE_MATCHER is non-NULL, set all the
5126 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5127 that match FILE_MATCHER. */
5130 dw_expand_symtabs_matching_file_matcher
5131 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5132 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5134 if (file_matcher
== NULL
)
5137 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5139 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5141 NULL
, xcalloc
, xfree
));
5142 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5144 NULL
, xcalloc
, xfree
));
5146 /* The rule is CUs specify all the files, including those used by
5147 any TU, so there's no need to scan TUs here. */
5149 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5152 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (dwarf2_per_objfile
, i
);
5153 struct quick_file_names
*file_data
;
5158 per_cu
->v
.quick
->mark
= 0;
5160 /* We only need to look at symtabs not already expanded. */
5161 if (per_cu
->v
.quick
->compunit_symtab
)
5164 file_data
= dw2_get_file_names (per_cu
);
5165 if (file_data
== NULL
)
5168 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5170 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5172 per_cu
->v
.quick
->mark
= 1;
5176 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
5178 const char *this_real_name
;
5180 if (file_matcher (file_data
->file_names
[j
], false))
5182 per_cu
->v
.quick
->mark
= 1;
5186 /* Before we invoke realpath, which can get expensive when many
5187 files are involved, do a quick comparison of the basenames. */
5188 if (!basenames_may_differ
5189 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5193 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5194 if (file_matcher (this_real_name
, false))
5196 per_cu
->v
.quick
->mark
= 1;
5201 slot
= htab_find_slot (per_cu
->v
.quick
->mark
5202 ? visited_found
.get ()
5203 : visited_not_found
.get (),
5210 dw2_expand_symtabs_matching
5211 (struct objfile
*objfile
,
5212 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5213 const lookup_name_info
&lookup_name
,
5214 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5215 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5216 enum search_domain kind
)
5218 struct dwarf2_per_objfile
*dwarf2_per_objfile
5219 = get_dwarf2_per_objfile (objfile
);
5221 /* index_table is NULL if OBJF_READNOW. */
5222 if (!dwarf2_per_objfile
->index_table
)
5225 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5227 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5229 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5231 kind
, [&] (offset_type idx
)
5233 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5234 expansion_notify
, kind
);
5238 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5241 static struct compunit_symtab
*
5242 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5247 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5248 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5251 if (cust
->includes
== NULL
)
5254 for (i
= 0; cust
->includes
[i
]; ++i
)
5256 struct compunit_symtab
*s
= cust
->includes
[i
];
5258 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5266 static struct compunit_symtab
*
5267 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5268 struct bound_minimal_symbol msymbol
,
5270 struct obj_section
*section
,
5273 struct dwarf2_per_cu_data
*data
;
5274 struct compunit_symtab
*result
;
5276 if (!objfile
->psymtabs_addrmap
)
5279 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5284 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5285 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5286 paddress (get_objfile_arch (objfile
), pc
));
5289 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5291 gdb_assert (result
!= NULL
);
5296 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5297 void *data
, int need_fullname
)
5299 struct dwarf2_per_objfile
*dwarf2_per_objfile
5300 = get_dwarf2_per_objfile (objfile
);
5302 if (!dwarf2_per_objfile
->filenames_cache
)
5304 dwarf2_per_objfile
->filenames_cache
.emplace ();
5306 htab_up
visited (htab_create_alloc (10,
5307 htab_hash_pointer
, htab_eq_pointer
,
5308 NULL
, xcalloc
, xfree
));
5310 /* The rule is CUs specify all the files, including those used
5311 by any TU, so there's no need to scan TUs here. We can
5312 ignore file names coming from already-expanded CUs. */
5314 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5316 dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
5318 if (per_cu
->v
.quick
->compunit_symtab
)
5320 void **slot
= htab_find_slot (visited
.get (),
5321 per_cu
->v
.quick
->file_names
,
5324 *slot
= per_cu
->v
.quick
->file_names
;
5328 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5330 dwarf2_per_cu_data
*per_cu
= dw2_get_cu (dwarf2_per_objfile
, i
);
5331 struct quick_file_names
*file_data
;
5334 /* We only need to look at symtabs not already expanded. */
5335 if (per_cu
->v
.quick
->compunit_symtab
)
5338 file_data
= dw2_get_file_names (per_cu
);
5339 if (file_data
== NULL
)
5342 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5345 /* Already visited. */
5350 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5352 const char *filename
= file_data
->file_names
[j
];
5353 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5358 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5360 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5363 this_real_name
= gdb_realpath (filename
);
5364 (*fun
) (filename
, this_real_name
.get (), data
);
5369 dw2_has_symbols (struct objfile
*objfile
)
5374 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5377 dw2_find_last_source_symtab
,
5378 dw2_forget_cached_source_info
,
5379 dw2_map_symtabs_matching_filename
,
5384 dw2_expand_symtabs_for_function
,
5385 dw2_expand_all_symtabs
,
5386 dw2_expand_symtabs_with_fullname
,
5387 dw2_map_matching_symbols
,
5388 dw2_expand_symtabs_matching
,
5389 dw2_find_pc_sect_compunit_symtab
,
5391 dw2_map_symbol_filenames
5394 /* DWARF-5 debug_names reader. */
5396 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5397 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5399 /* A helper function that reads the .debug_names section in SECTION
5400 and fills in MAP. FILENAME is the name of the file containing the
5401 section; it is used for error reporting.
5403 Returns true if all went well, false otherwise. */
5406 read_debug_names_from_section (struct objfile
*objfile
,
5407 const char *filename
,
5408 struct dwarf2_section_info
*section
,
5409 mapped_debug_names
&map
)
5411 if (dwarf2_section_empty_p (section
))
5414 /* Older elfutils strip versions could keep the section in the main
5415 executable while splitting it for the separate debug info file. */
5416 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5419 dwarf2_read_section (objfile
, section
);
5421 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5423 const gdb_byte
*addr
= section
->buffer
;
5425 bfd
*const abfd
= get_section_bfd_owner (section
);
5427 unsigned int bytes_read
;
5428 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5431 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5432 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5433 if (bytes_read
+ length
!= section
->size
)
5435 /* There may be multiple per-CU indices. */
5436 warning (_("Section .debug_names in %s length %s does not match "
5437 "section length %s, ignoring .debug_names."),
5438 filename
, plongest (bytes_read
+ length
),
5439 pulongest (section
->size
));
5443 /* The version number. */
5444 uint16_t version
= read_2_bytes (abfd
, addr
);
5448 warning (_("Section .debug_names in %s has unsupported version %d, "
5449 "ignoring .debug_names."),
5455 uint16_t padding
= read_2_bytes (abfd
, addr
);
5459 warning (_("Section .debug_names in %s has unsupported padding %d, "
5460 "ignoring .debug_names."),
5465 /* comp_unit_count - The number of CUs in the CU list. */
5466 map
.cu_count
= read_4_bytes (abfd
, addr
);
5469 /* local_type_unit_count - The number of TUs in the local TU
5471 map
.tu_count
= read_4_bytes (abfd
, addr
);
5474 /* foreign_type_unit_count - The number of TUs in the foreign TU
5476 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5478 if (foreign_tu_count
!= 0)
5480 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5481 "ignoring .debug_names."),
5482 filename
, static_cast<unsigned long> (foreign_tu_count
));
5486 /* bucket_count - The number of hash buckets in the hash lookup
5488 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5491 /* name_count - The number of unique names in the index. */
5492 map
.name_count
= read_4_bytes (abfd
, addr
);
5495 /* abbrev_table_size - The size in bytes of the abbreviations
5497 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5500 /* augmentation_string_size - The size in bytes of the augmentation
5501 string. This value is rounded up to a multiple of 4. */
5502 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5504 map
.augmentation_is_gdb
= ((augmentation_string_size
5505 == sizeof (dwarf5_augmentation
))
5506 && memcmp (addr
, dwarf5_augmentation
,
5507 sizeof (dwarf5_augmentation
)) == 0);
5508 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5509 addr
+= augmentation_string_size
;
5512 map
.cu_table_reordered
= addr
;
5513 addr
+= map
.cu_count
* map
.offset_size
;
5515 /* List of Local TUs */
5516 map
.tu_table_reordered
= addr
;
5517 addr
+= map
.tu_count
* map
.offset_size
;
5519 /* Hash Lookup Table */
5520 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5521 addr
+= map
.bucket_count
* 4;
5522 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5523 addr
+= map
.name_count
* 4;
5526 map
.name_table_string_offs_reordered
= addr
;
5527 addr
+= map
.name_count
* map
.offset_size
;
5528 map
.name_table_entry_offs_reordered
= addr
;
5529 addr
+= map
.name_count
* map
.offset_size
;
5531 const gdb_byte
*abbrev_table_start
= addr
;
5534 unsigned int bytes_read
;
5535 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5540 const auto insertpair
5541 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5542 if (!insertpair
.second
)
5544 warning (_("Section .debug_names in %s has duplicate index %s, "
5545 "ignoring .debug_names."),
5546 filename
, pulongest (index_num
));
5549 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5550 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5555 mapped_debug_names::index_val::attr attr
;
5556 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5558 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5560 if (attr
.form
== DW_FORM_implicit_const
)
5562 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5566 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5568 indexval
.attr_vec
.push_back (std::move (attr
));
5571 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5573 warning (_("Section .debug_names in %s has abbreviation_table "
5574 "of size %zu vs. written as %u, ignoring .debug_names."),
5575 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5578 map
.entry_pool
= addr
;
5583 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5587 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5588 const mapped_debug_names
&map
,
5589 dwarf2_section_info
§ion
,
5590 bool is_dwz
, int base_offset
)
5592 sect_offset sect_off_prev
;
5593 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5595 sect_offset sect_off_next
;
5596 if (i
< map
.cu_count
)
5599 = (sect_offset
) (extract_unsigned_integer
5600 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5602 map
.dwarf5_byte_order
));
5605 sect_off_next
= (sect_offset
) section
.size
;
5608 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5609 dwarf2_per_objfile
->all_comp_units
[base_offset
+ (i
- 1)]
5610 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5611 sect_off_prev
, length
);
5613 sect_off_prev
= sect_off_next
;
5617 /* Read the CU list from the mapped index, and use it to create all
5618 the CU objects for this dwarf2_per_objfile. */
5621 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5622 const mapped_debug_names
&map
,
5623 const mapped_debug_names
&dwz_map
)
5625 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5627 dwarf2_per_objfile
->n_comp_units
= map
.cu_count
+ dwz_map
.cu_count
;
5628 dwarf2_per_objfile
->all_comp_units
5629 = XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
5630 dwarf2_per_objfile
->n_comp_units
);
5632 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5633 dwarf2_per_objfile
->info
,
5635 0 /* base_offset */);
5637 if (dwz_map
.cu_count
== 0)
5640 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5641 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5643 map
.cu_count
/* base_offset */);
5646 /* Read .debug_names. If everything went ok, initialize the "quick"
5647 elements of all the CUs and return true. Otherwise, return false. */
5650 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5652 mapped_debug_names
local_map (dwarf2_per_objfile
);
5653 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5654 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5656 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5657 &dwarf2_per_objfile
->debug_names
,
5661 /* Don't use the index if it's empty. */
5662 if (local_map
.name_count
== 0)
5665 /* If there is a .dwz file, read it so we can get its CU list as
5667 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5670 if (!read_debug_names_from_section (objfile
,
5671 bfd_get_filename (dwz
->dwz_bfd
),
5672 &dwz
->debug_names
, dwz_map
))
5674 warning (_("could not read '.debug_names' section from %s; skipping"),
5675 bfd_get_filename (dwz
->dwz_bfd
));
5680 create_cus_from_debug_names (dwarf2_per_objfile
, local_map
, dwz_map
);
5682 if (local_map
.tu_count
!= 0)
5684 /* We can only handle a single .debug_types when we have an
5686 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5689 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5690 dwarf2_per_objfile
->types
, 0);
5692 create_signatured_type_table_from_debug_names
5693 (dwarf2_per_objfile
, local_map
, section
, &dwarf2_per_objfile
->abbrev
);
5696 create_addrmap_from_aranges (dwarf2_per_objfile
,
5697 &dwarf2_per_objfile
->debug_aranges
);
5699 dwarf2_per_objfile
->debug_names_table
.reset
5700 (new mapped_debug_names (dwarf2_per_objfile
));
5701 *dwarf2_per_objfile
->debug_names_table
= std::move (local_map
);
5702 dwarf2_per_objfile
->using_index
= 1;
5703 dwarf2_per_objfile
->quick_file_names_table
=
5704 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
5709 /* Type used to manage iterating over all CUs looking for a symbol for
5712 class dw2_debug_names_iterator
5715 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5716 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5717 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5718 bool want_specific_block
,
5719 block_enum block_index
, domain_enum domain
,
5721 : m_map (map
), m_want_specific_block (want_specific_block
),
5722 m_block_index (block_index
), m_domain (domain
),
5723 m_addr (find_vec_in_debug_names (map
, name
))
5726 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5727 search_domain search
, uint32_t namei
)
5730 m_addr (find_vec_in_debug_names (map
, namei
))
5733 /* Return the next matching CU or NULL if there are no more. */
5734 dwarf2_per_cu_data
*next ();
5737 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5739 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5742 /* The internalized form of .debug_names. */
5743 const mapped_debug_names
&m_map
;
5745 /* If true, only look for symbols that match BLOCK_INDEX. */
5746 const bool m_want_specific_block
= false;
5748 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5749 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5751 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5753 /* The kind of symbol we're looking for. */
5754 const domain_enum m_domain
= UNDEF_DOMAIN
;
5755 const search_domain m_search
= ALL_DOMAIN
;
5757 /* The list of CUs from the index entry of the symbol, or NULL if
5759 const gdb_byte
*m_addr
;
5763 mapped_debug_names::namei_to_name (uint32_t namei
) const
5765 const ULONGEST namei_string_offs
5766 = extract_unsigned_integer ((name_table_string_offs_reordered
5767 + namei
* offset_size
),
5770 return read_indirect_string_at_offset
5771 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5774 /* Find a slot in .debug_names for the object named NAME. If NAME is
5775 found, return pointer to its pool data. If NAME cannot be found,
5779 dw2_debug_names_iterator::find_vec_in_debug_names
5780 (const mapped_debug_names
&map
, const char *name
)
5782 int (*cmp
) (const char *, const char *);
5784 if (current_language
->la_language
== language_cplus
5785 || current_language
->la_language
== language_fortran
5786 || current_language
->la_language
== language_d
)
5788 /* NAME is already canonical. Drop any qualifiers as
5789 .debug_names does not contain any. */
5791 if (strchr (name
, '(') != NULL
)
5793 gdb::unique_xmalloc_ptr
<char> without_params
5794 = cp_remove_params (name
);
5796 if (without_params
!= NULL
)
5798 name
= without_params
.get();
5803 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5805 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5807 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5808 (map
.bucket_table_reordered
5809 + (full_hash
% map
.bucket_count
)), 4,
5810 map
.dwarf5_byte_order
);
5814 if (namei
>= map
.name_count
)
5816 complaint (&symfile_complaints
,
5817 _("Wrong .debug_names with name index %u but name_count=%u "
5819 namei
, map
.name_count
,
5820 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5826 const uint32_t namei_full_hash
5827 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5828 (map
.hash_table_reordered
+ namei
), 4,
5829 map
.dwarf5_byte_order
);
5830 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5833 if (full_hash
== namei_full_hash
)
5835 const char *const namei_string
= map
.namei_to_name (namei
);
5837 #if 0 /* An expensive sanity check. */
5838 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5840 complaint (&symfile_complaints
,
5841 _("Wrong .debug_names hash for string at index %u "
5843 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5848 if (cmp (namei_string
, name
) == 0)
5850 const ULONGEST namei_entry_offs
5851 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5852 + namei
* map
.offset_size
),
5853 map
.offset_size
, map
.dwarf5_byte_order
);
5854 return map
.entry_pool
+ namei_entry_offs
;
5859 if (namei
>= map
.name_count
)
5865 dw2_debug_names_iterator::find_vec_in_debug_names
5866 (const mapped_debug_names
&map
, uint32_t namei
)
5868 if (namei
>= map
.name_count
)
5870 complaint (&symfile_complaints
,
5871 _("Wrong .debug_names with name index %u but name_count=%u "
5873 namei
, map
.name_count
,
5874 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5878 const ULONGEST namei_entry_offs
5879 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5880 + namei
* map
.offset_size
),
5881 map
.offset_size
, map
.dwarf5_byte_order
);
5882 return map
.entry_pool
+ namei_entry_offs
;
5885 /* See dw2_debug_names_iterator. */
5887 dwarf2_per_cu_data
*
5888 dw2_debug_names_iterator::next ()
5893 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5894 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5895 bfd
*const abfd
= objfile
->obfd
;
5899 unsigned int bytes_read
;
5900 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5901 m_addr
+= bytes_read
;
5905 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5906 if (indexval_it
== m_map
.abbrev_map
.cend ())
5908 complaint (&symfile_complaints
,
5909 _("Wrong .debug_names undefined abbrev code %s "
5911 pulongest (abbrev
), objfile_name (objfile
));
5914 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5915 bool have_is_static
= false;
5917 dwarf2_per_cu_data
*per_cu
= NULL
;
5918 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5923 case DW_FORM_implicit_const
:
5924 ull
= attr
.implicit_const
;
5926 case DW_FORM_flag_present
:
5930 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5931 m_addr
+= bytes_read
;
5934 complaint (&symfile_complaints
,
5935 _("Unsupported .debug_names form %s [in module %s]"),
5936 dwarf_form_name (attr
.form
),
5937 objfile_name (objfile
));
5940 switch (attr
.dw_idx
)
5942 case DW_IDX_compile_unit
:
5943 /* Don't crash on bad data. */
5944 if (ull
>= dwarf2_per_objfile
->n_comp_units
)
5946 complaint (&symfile_complaints
,
5947 _(".debug_names entry has bad CU index %s"
5950 objfile_name (dwarf2_per_objfile
->objfile
));
5953 per_cu
= dw2_get_cutu (dwarf2_per_objfile
, ull
);
5955 case DW_IDX_type_unit
:
5956 /* Don't crash on bad data. */
5957 if (ull
>= dwarf2_per_objfile
->n_type_units
)
5959 complaint (&symfile_complaints
,
5960 _(".debug_names entry has bad TU index %s"
5963 objfile_name (dwarf2_per_objfile
->objfile
));
5966 per_cu
= dw2_get_cutu (dwarf2_per_objfile
,
5967 dwarf2_per_objfile
->n_comp_units
+ ull
);
5969 case DW_IDX_GNU_internal
:
5970 if (!m_map
.augmentation_is_gdb
)
5972 have_is_static
= true;
5975 case DW_IDX_GNU_external
:
5976 if (!m_map
.augmentation_is_gdb
)
5978 have_is_static
= true;
5984 /* Skip if already read in. */
5985 if (per_cu
->v
.quick
->compunit_symtab
)
5988 /* Check static vs global. */
5991 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5992 if (m_want_specific_block
&& want_static
!= is_static
)
5996 /* Match dw2_symtab_iter_next, symbol_kind
5997 and debug_names::psymbol_tag. */
6001 switch (indexval
.dwarf_tag
)
6003 case DW_TAG_variable
:
6004 case DW_TAG_subprogram
:
6005 /* Some types are also in VAR_DOMAIN. */
6006 case DW_TAG_typedef
:
6007 case DW_TAG_structure_type
:
6014 switch (indexval
.dwarf_tag
)
6016 case DW_TAG_typedef
:
6017 case DW_TAG_structure_type
:
6024 switch (indexval
.dwarf_tag
)
6027 case DW_TAG_variable
:
6037 /* Match dw2_expand_symtabs_matching, symbol_kind and
6038 debug_names::psymbol_tag. */
6041 case VARIABLES_DOMAIN
:
6042 switch (indexval
.dwarf_tag
)
6044 case DW_TAG_variable
:
6050 case FUNCTIONS_DOMAIN
:
6051 switch (indexval
.dwarf_tag
)
6053 case DW_TAG_subprogram
:
6060 switch (indexval
.dwarf_tag
)
6062 case DW_TAG_typedef
:
6063 case DW_TAG_structure_type
:
6076 static struct compunit_symtab
*
6077 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6078 const char *name
, domain_enum domain
)
6080 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6081 struct dwarf2_per_objfile
*dwarf2_per_objfile
6082 = get_dwarf2_per_objfile (objfile
);
6084 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6087 /* index is NULL if OBJF_READNOW. */
6090 const auto &map
= *mapp
;
6092 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6093 block_index
, domain
, name
);
6095 struct compunit_symtab
*stab_best
= NULL
;
6096 struct dwarf2_per_cu_data
*per_cu
;
6097 while ((per_cu
= iter
.next ()) != NULL
)
6099 struct symbol
*sym
, *with_opaque
= NULL
;
6100 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
6101 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6102 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6104 sym
= block_find_symbol (block
, name
, domain
,
6105 block_find_non_opaque_type_preferred
,
6108 /* Some caution must be observed with overloaded functions and
6109 methods, since the index will not contain any overload
6110 information (but NAME might contain it). */
6113 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6115 if (with_opaque
!= NULL
6116 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6119 /* Keep looking through other CUs. */
6125 /* This dumps minimal information about .debug_names. It is called
6126 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6127 uses this to verify that .debug_names has been loaded. */
6130 dw2_debug_names_dump (struct objfile
*objfile
)
6132 struct dwarf2_per_objfile
*dwarf2_per_objfile
6133 = get_dwarf2_per_objfile (objfile
);
6135 gdb_assert (dwarf2_per_objfile
->using_index
);
6136 printf_filtered (".debug_names:");
6137 if (dwarf2_per_objfile
->debug_names_table
)
6138 printf_filtered (" exists\n");
6140 printf_filtered (" faked for \"readnow\"\n");
6141 printf_filtered ("\n");
6145 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6146 const char *func_name
)
6148 struct dwarf2_per_objfile
*dwarf2_per_objfile
6149 = get_dwarf2_per_objfile (objfile
);
6151 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6152 if (dwarf2_per_objfile
->debug_names_table
)
6154 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6156 /* Note: It doesn't matter what we pass for block_index here. */
6157 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6158 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6160 struct dwarf2_per_cu_data
*per_cu
;
6161 while ((per_cu
= iter
.next ()) != NULL
)
6162 dw2_instantiate_symtab (per_cu
);
6167 dw2_debug_names_expand_symtabs_matching
6168 (struct objfile
*objfile
,
6169 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6170 const lookup_name_info
&lookup_name
,
6171 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6172 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6173 enum search_domain kind
)
6175 struct dwarf2_per_objfile
*dwarf2_per_objfile
6176 = get_dwarf2_per_objfile (objfile
);
6178 /* debug_names_table is NULL if OBJF_READNOW. */
6179 if (!dwarf2_per_objfile
->debug_names_table
)
6182 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6184 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6186 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6188 kind
, [&] (offset_type namei
)
6190 /* The name was matched, now expand corresponding CUs that were
6192 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6194 struct dwarf2_per_cu_data
*per_cu
;
6195 while ((per_cu
= iter
.next ()) != NULL
)
6196 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6201 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6204 dw2_find_last_source_symtab
,
6205 dw2_forget_cached_source_info
,
6206 dw2_map_symtabs_matching_filename
,
6207 dw2_debug_names_lookup_symbol
,
6209 dw2_debug_names_dump
,
6211 dw2_debug_names_expand_symtabs_for_function
,
6212 dw2_expand_all_symtabs
,
6213 dw2_expand_symtabs_with_fullname
,
6214 dw2_map_matching_symbols
,
6215 dw2_debug_names_expand_symtabs_matching
,
6216 dw2_find_pc_sect_compunit_symtab
,
6218 dw2_map_symbol_filenames
6221 /* See symfile.h. */
6224 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6226 struct dwarf2_per_objfile
*dwarf2_per_objfile
6227 = get_dwarf2_per_objfile (objfile
);
6229 /* If we're about to read full symbols, don't bother with the
6230 indices. In this case we also don't care if some other debug
6231 format is making psymtabs, because they are all about to be
6233 if ((objfile
->flags
& OBJF_READNOW
))
6237 dwarf2_per_objfile
->using_index
= 1;
6238 create_all_comp_units (dwarf2_per_objfile
);
6239 create_all_type_units (dwarf2_per_objfile
);
6240 dwarf2_per_objfile
->quick_file_names_table
=
6241 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
6243 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
6244 + dwarf2_per_objfile
->n_type_units
); ++i
)
6246 dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
6248 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6249 struct dwarf2_per_cu_quick_data
);
6252 /* Return 1 so that gdb sees the "quick" functions. However,
6253 these functions will be no-ops because we will have expanded
6255 *index_kind
= dw_index_kind::GDB_INDEX
;
6259 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6261 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6265 if (dwarf2_read_index (objfile
))
6267 *index_kind
= dw_index_kind::GDB_INDEX
;
6276 /* Build a partial symbol table. */
6279 dwarf2_build_psymtabs (struct objfile
*objfile
)
6281 struct dwarf2_per_objfile
*dwarf2_per_objfile
6282 = get_dwarf2_per_objfile (objfile
);
6284 if (objfile
->global_psymbols
.capacity () == 0
6285 && objfile
->static_psymbols
.capacity () == 0)
6286 init_psymbol_list (objfile
, 1024);
6290 /* This isn't really ideal: all the data we allocate on the
6291 objfile's obstack is still uselessly kept around. However,
6292 freeing it seems unsafe. */
6293 psymtab_discarder
psymtabs (objfile
);
6294 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6297 CATCH (except
, RETURN_MASK_ERROR
)
6299 exception_print (gdb_stderr
, except
);
6304 /* Return the total length of the CU described by HEADER. */
6307 get_cu_length (const struct comp_unit_head
*header
)
6309 return header
->initial_length_size
+ header
->length
;
6312 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6315 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6317 sect_offset bottom
= cu_header
->sect_off
;
6318 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6320 return sect_off
>= bottom
&& sect_off
< top
;
6323 /* Find the base address of the compilation unit for range lists and
6324 location lists. It will normally be specified by DW_AT_low_pc.
6325 In DWARF-3 draft 4, the base address could be overridden by
6326 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6327 compilation units with discontinuous ranges. */
6330 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6332 struct attribute
*attr
;
6335 cu
->base_address
= 0;
6337 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6340 cu
->base_address
= attr_value_as_address (attr
);
6345 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6348 cu
->base_address
= attr_value_as_address (attr
);
6354 /* Read in the comp unit header information from the debug_info at info_ptr.
6355 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6356 NOTE: This leaves members offset, first_die_offset to be filled in
6359 static const gdb_byte
*
6360 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6361 const gdb_byte
*info_ptr
,
6362 struct dwarf2_section_info
*section
,
6363 rcuh_kind section_kind
)
6366 unsigned int bytes_read
;
6367 const char *filename
= get_section_file_name (section
);
6368 bfd
*abfd
= get_section_bfd_owner (section
);
6370 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6371 cu_header
->initial_length_size
= bytes_read
;
6372 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6373 info_ptr
+= bytes_read
;
6374 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6376 if (cu_header
->version
< 5)
6377 switch (section_kind
)
6379 case rcuh_kind::COMPILE
:
6380 cu_header
->unit_type
= DW_UT_compile
;
6382 case rcuh_kind::TYPE
:
6383 cu_header
->unit_type
= DW_UT_type
;
6386 internal_error (__FILE__
, __LINE__
,
6387 _("read_comp_unit_head: invalid section_kind"));
6391 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6392 (read_1_byte (abfd
, info_ptr
));
6394 switch (cu_header
->unit_type
)
6397 if (section_kind
!= rcuh_kind::COMPILE
)
6398 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6399 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6403 section_kind
= rcuh_kind::TYPE
;
6406 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6407 "(is %d, should be %d or %d) [in module %s]"),
6408 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6411 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6414 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6417 info_ptr
+= bytes_read
;
6418 if (cu_header
->version
< 5)
6420 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6423 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6424 if (signed_addr
< 0)
6425 internal_error (__FILE__
, __LINE__
,
6426 _("read_comp_unit_head: dwarf from non elf file"));
6427 cu_header
->signed_addr_p
= signed_addr
;
6429 if (section_kind
== rcuh_kind::TYPE
)
6431 LONGEST type_offset
;
6433 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6436 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6437 info_ptr
+= bytes_read
;
6438 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6439 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6440 error (_("Dwarf Error: Too big type_offset in compilation unit "
6441 "header (is %s) [in module %s]"), plongest (type_offset
),
6448 /* Helper function that returns the proper abbrev section for
6451 static struct dwarf2_section_info
*
6452 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6454 struct dwarf2_section_info
*abbrev
;
6455 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6457 if (this_cu
->is_dwz
)
6458 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6460 abbrev
= &dwarf2_per_objfile
->abbrev
;
6465 /* Subroutine of read_and_check_comp_unit_head and
6466 read_and_check_type_unit_head to simplify them.
6467 Perform various error checking on the header. */
6470 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6471 struct comp_unit_head
*header
,
6472 struct dwarf2_section_info
*section
,
6473 struct dwarf2_section_info
*abbrev_section
)
6475 const char *filename
= get_section_file_name (section
);
6477 if (header
->version
< 2 || header
->version
> 5)
6478 error (_("Dwarf Error: wrong version in compilation unit header "
6479 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6482 if (to_underlying (header
->abbrev_sect_off
)
6483 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6484 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6485 "(offset %s + 6) [in module %s]"),
6486 sect_offset_str (header
->abbrev_sect_off
),
6487 sect_offset_str (header
->sect_off
),
6490 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6491 avoid potential 32-bit overflow. */
6492 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6494 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6495 "(offset %s + 0) [in module %s]"),
6496 header
->length
, sect_offset_str (header
->sect_off
),
6500 /* Read in a CU/TU header and perform some basic error checking.
6501 The contents of the header are stored in HEADER.
6502 The result is a pointer to the start of the first DIE. */
6504 static const gdb_byte
*
6505 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6506 struct comp_unit_head
*header
,
6507 struct dwarf2_section_info
*section
,
6508 struct dwarf2_section_info
*abbrev_section
,
6509 const gdb_byte
*info_ptr
,
6510 rcuh_kind section_kind
)
6512 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6514 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6516 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6518 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6520 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6526 /* Fetch the abbreviation table offset from a comp or type unit header. */
6529 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6530 struct dwarf2_section_info
*section
,
6531 sect_offset sect_off
)
6533 bfd
*abfd
= get_section_bfd_owner (section
);
6534 const gdb_byte
*info_ptr
;
6535 unsigned int initial_length_size
, offset_size
;
6538 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6539 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6540 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6541 offset_size
= initial_length_size
== 4 ? 4 : 8;
6542 info_ptr
+= initial_length_size
;
6544 version
= read_2_bytes (abfd
, info_ptr
);
6548 /* Skip unit type and address size. */
6552 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6555 /* Allocate a new partial symtab for file named NAME and mark this new
6556 partial symtab as being an include of PST. */
6559 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6560 struct objfile
*objfile
)
6562 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6564 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6566 /* It shares objfile->objfile_obstack. */
6567 subpst
->dirname
= pst
->dirname
;
6570 subpst
->textlow
= 0;
6571 subpst
->texthigh
= 0;
6573 subpst
->dependencies
6574 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6575 subpst
->dependencies
[0] = pst
;
6576 subpst
->number_of_dependencies
= 1;
6578 subpst
->globals_offset
= 0;
6579 subpst
->n_global_syms
= 0;
6580 subpst
->statics_offset
= 0;
6581 subpst
->n_static_syms
= 0;
6582 subpst
->compunit_symtab
= NULL
;
6583 subpst
->read_symtab
= pst
->read_symtab
;
6586 /* No private part is necessary for include psymtabs. This property
6587 can be used to differentiate between such include psymtabs and
6588 the regular ones. */
6589 subpst
->read_symtab_private
= NULL
;
6592 /* Read the Line Number Program data and extract the list of files
6593 included by the source file represented by PST. Build an include
6594 partial symtab for each of these included files. */
6597 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6598 struct die_info
*die
,
6599 struct partial_symtab
*pst
)
6602 struct attribute
*attr
;
6604 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6606 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6608 return; /* No linetable, so no includes. */
6610 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6611 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6615 hash_signatured_type (const void *item
)
6617 const struct signatured_type
*sig_type
6618 = (const struct signatured_type
*) item
;
6620 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6621 return sig_type
->signature
;
6625 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6627 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6628 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6630 return lhs
->signature
== rhs
->signature
;
6633 /* Allocate a hash table for signatured types. */
6636 allocate_signatured_type_table (struct objfile
*objfile
)
6638 return htab_create_alloc_ex (41,
6639 hash_signatured_type
,
6642 &objfile
->objfile_obstack
,
6643 hashtab_obstack_allocate
,
6644 dummy_obstack_deallocate
);
6647 /* A helper function to add a signatured type CU to a table. */
6650 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6652 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6653 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
6661 /* A helper for create_debug_types_hash_table. Read types from SECTION
6662 and fill them into TYPES_HTAB. It will process only type units,
6663 therefore DW_UT_type. */
6666 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6667 struct dwo_file
*dwo_file
,
6668 dwarf2_section_info
*section
, htab_t
&types_htab
,
6669 rcuh_kind section_kind
)
6671 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6672 struct dwarf2_section_info
*abbrev_section
;
6674 const gdb_byte
*info_ptr
, *end_ptr
;
6676 abbrev_section
= (dwo_file
!= NULL
6677 ? &dwo_file
->sections
.abbrev
6678 : &dwarf2_per_objfile
->abbrev
);
6680 if (dwarf_read_debug
)
6681 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6682 get_section_name (section
),
6683 get_section_file_name (abbrev_section
));
6685 dwarf2_read_section (objfile
, section
);
6686 info_ptr
= section
->buffer
;
6688 if (info_ptr
== NULL
)
6691 /* We can't set abfd until now because the section may be empty or
6692 not present, in which case the bfd is unknown. */
6693 abfd
= get_section_bfd_owner (section
);
6695 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6696 because we don't need to read any dies: the signature is in the
6699 end_ptr
= info_ptr
+ section
->size
;
6700 while (info_ptr
< end_ptr
)
6702 struct signatured_type
*sig_type
;
6703 struct dwo_unit
*dwo_tu
;
6705 const gdb_byte
*ptr
= info_ptr
;
6706 struct comp_unit_head header
;
6707 unsigned int length
;
6709 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6711 /* Initialize it due to a false compiler warning. */
6712 header
.signature
= -1;
6713 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6715 /* We need to read the type's signature in order to build the hash
6716 table, but we don't need anything else just yet. */
6718 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6719 abbrev_section
, ptr
, section_kind
);
6721 length
= get_cu_length (&header
);
6723 /* Skip dummy type units. */
6724 if (ptr
>= info_ptr
+ length
6725 || peek_abbrev_code (abfd
, ptr
) == 0
6726 || header
.unit_type
!= DW_UT_type
)
6732 if (types_htab
== NULL
)
6735 types_htab
= allocate_dwo_unit_table (objfile
);
6737 types_htab
= allocate_signatured_type_table (objfile
);
6743 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6745 dwo_tu
->dwo_file
= dwo_file
;
6746 dwo_tu
->signature
= header
.signature
;
6747 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6748 dwo_tu
->section
= section
;
6749 dwo_tu
->sect_off
= sect_off
;
6750 dwo_tu
->length
= length
;
6754 /* N.B.: type_offset is not usable if this type uses a DWO file.
6755 The real type_offset is in the DWO file. */
6757 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6758 struct signatured_type
);
6759 sig_type
->signature
= header
.signature
;
6760 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6761 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6762 sig_type
->per_cu
.is_debug_types
= 1;
6763 sig_type
->per_cu
.section
= section
;
6764 sig_type
->per_cu
.sect_off
= sect_off
;
6765 sig_type
->per_cu
.length
= length
;
6768 slot
= htab_find_slot (types_htab
,
6769 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6771 gdb_assert (slot
!= NULL
);
6774 sect_offset dup_sect_off
;
6778 const struct dwo_unit
*dup_tu
6779 = (const struct dwo_unit
*) *slot
;
6781 dup_sect_off
= dup_tu
->sect_off
;
6785 const struct signatured_type
*dup_tu
6786 = (const struct signatured_type
*) *slot
;
6788 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6791 complaint (&symfile_complaints
,
6792 _("debug type entry at offset %s is duplicate to"
6793 " the entry at offset %s, signature %s"),
6794 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6795 hex_string (header
.signature
));
6797 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6799 if (dwarf_read_debug
> 1)
6800 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6801 sect_offset_str (sect_off
),
6802 hex_string (header
.signature
));
6808 /* Create the hash table of all entries in the .debug_types
6809 (or .debug_types.dwo) section(s).
6810 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6811 otherwise it is NULL.
6813 The result is a pointer to the hash table or NULL if there are no types.
6815 Note: This function processes DWO files only, not DWP files. */
6818 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6819 struct dwo_file
*dwo_file
,
6820 VEC (dwarf2_section_info_def
) *types
,
6824 struct dwarf2_section_info
*section
;
6826 if (VEC_empty (dwarf2_section_info_def
, types
))
6830 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6832 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6833 types_htab
, rcuh_kind::TYPE
);
6836 /* Create the hash table of all entries in the .debug_types section,
6837 and initialize all_type_units.
6838 The result is zero if there is an error (e.g. missing .debug_types section),
6839 otherwise non-zero. */
6842 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6844 htab_t types_htab
= NULL
;
6845 struct signatured_type
**iter
;
6847 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6848 &dwarf2_per_objfile
->info
, types_htab
,
6849 rcuh_kind::COMPILE
);
6850 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6851 dwarf2_per_objfile
->types
, types_htab
);
6852 if (types_htab
== NULL
)
6854 dwarf2_per_objfile
->signatured_types
= NULL
;
6858 dwarf2_per_objfile
->signatured_types
= types_htab
;
6860 dwarf2_per_objfile
->n_type_units
6861 = dwarf2_per_objfile
->n_allocated_type_units
6862 = htab_elements (types_htab
);
6863 dwarf2_per_objfile
->all_type_units
=
6864 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
6865 iter
= &dwarf2_per_objfile
->all_type_units
[0];
6866 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
6867 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
6868 == dwarf2_per_objfile
->n_type_units
);
6873 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6874 If SLOT is non-NULL, it is the entry to use in the hash table.
6875 Otherwise we find one. */
6877 static struct signatured_type
*
6878 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6881 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6882 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
6883 struct signatured_type
*sig_type
;
6885 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
6887 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
6889 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
6890 dwarf2_per_objfile
->n_allocated_type_units
= 1;
6891 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
6892 dwarf2_per_objfile
->all_type_units
6893 = XRESIZEVEC (struct signatured_type
*,
6894 dwarf2_per_objfile
->all_type_units
,
6895 dwarf2_per_objfile
->n_allocated_type_units
);
6896 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6898 dwarf2_per_objfile
->n_type_units
= n_type_units
;
6900 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6901 struct signatured_type
);
6902 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
6903 sig_type
->signature
= sig
;
6904 sig_type
->per_cu
.is_debug_types
= 1;
6905 if (dwarf2_per_objfile
->using_index
)
6907 sig_type
->per_cu
.v
.quick
=
6908 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6909 struct dwarf2_per_cu_quick_data
);
6914 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6917 gdb_assert (*slot
== NULL
);
6919 /* The rest of sig_type must be filled in by the caller. */
6923 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6924 Fill in SIG_ENTRY with DWO_ENTRY. */
6927 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6928 struct signatured_type
*sig_entry
,
6929 struct dwo_unit
*dwo_entry
)
6931 /* Make sure we're not clobbering something we don't expect to. */
6932 gdb_assert (! sig_entry
->per_cu
.queued
);
6933 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6934 if (dwarf2_per_objfile
->using_index
)
6936 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6937 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6940 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6941 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6942 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6943 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6944 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6946 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6947 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6948 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6949 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6950 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6951 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6952 sig_entry
->dwo_unit
= dwo_entry
;
6955 /* Subroutine of lookup_signatured_type.
6956 If we haven't read the TU yet, create the signatured_type data structure
6957 for a TU to be read in directly from a DWO file, bypassing the stub.
6958 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6959 using .gdb_index, then when reading a CU we want to stay in the DWO file
6960 containing that CU. Otherwise we could end up reading several other DWO
6961 files (due to comdat folding) to process the transitive closure of all the
6962 mentioned TUs, and that can be slow. The current DWO file will have every
6963 type signature that it needs.
6964 We only do this for .gdb_index because in the psymtab case we already have
6965 to read all the DWOs to build the type unit groups. */
6967 static struct signatured_type
*
6968 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6970 struct dwarf2_per_objfile
*dwarf2_per_objfile
6971 = cu
->per_cu
->dwarf2_per_objfile
;
6972 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6973 struct dwo_file
*dwo_file
;
6974 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6975 struct signatured_type find_sig_entry
, *sig_entry
;
6978 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6980 /* If TU skeletons have been removed then we may not have read in any
6982 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6984 dwarf2_per_objfile
->signatured_types
6985 = allocate_signatured_type_table (objfile
);
6988 /* We only ever need to read in one copy of a signatured type.
6989 Use the global signatured_types array to do our own comdat-folding
6990 of types. If this is the first time we're reading this TU, and
6991 the TU has an entry in .gdb_index, replace the recorded data from
6992 .gdb_index with this TU. */
6994 find_sig_entry
.signature
= sig
;
6995 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6996 &find_sig_entry
, INSERT
);
6997 sig_entry
= (struct signatured_type
*) *slot
;
6999 /* We can get here with the TU already read, *or* in the process of being
7000 read. Don't reassign the global entry to point to this DWO if that's
7001 the case. Also note that if the TU is already being read, it may not
7002 have come from a DWO, the program may be a mix of Fission-compiled
7003 code and non-Fission-compiled code. */
7005 /* Have we already tried to read this TU?
7006 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7007 needn't exist in the global table yet). */
7008 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
7011 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7012 dwo_unit of the TU itself. */
7013 dwo_file
= cu
->dwo_unit
->dwo_file
;
7015 /* Ok, this is the first time we're reading this TU. */
7016 if (dwo_file
->tus
== NULL
)
7018 find_dwo_entry
.signature
= sig
;
7019 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7020 if (dwo_entry
== NULL
)
7023 /* If the global table doesn't have an entry for this TU, add one. */
7024 if (sig_entry
== NULL
)
7025 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7027 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7028 sig_entry
->per_cu
.tu_read
= 1;
7032 /* Subroutine of lookup_signatured_type.
7033 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7034 then try the DWP file. If the TU stub (skeleton) has been removed then
7035 it won't be in .gdb_index. */
7037 static struct signatured_type
*
7038 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7040 struct dwarf2_per_objfile
*dwarf2_per_objfile
7041 = cu
->per_cu
->dwarf2_per_objfile
;
7042 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7043 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7044 struct dwo_unit
*dwo_entry
;
7045 struct signatured_type find_sig_entry
, *sig_entry
;
7048 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7049 gdb_assert (dwp_file
!= NULL
);
7051 /* If TU skeletons have been removed then we may not have read in any
7053 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7055 dwarf2_per_objfile
->signatured_types
7056 = allocate_signatured_type_table (objfile
);
7059 find_sig_entry
.signature
= sig
;
7060 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7061 &find_sig_entry
, INSERT
);
7062 sig_entry
= (struct signatured_type
*) *slot
;
7064 /* Have we already tried to read this TU?
7065 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7066 needn't exist in the global table yet). */
7067 if (sig_entry
!= NULL
)
7070 if (dwp_file
->tus
== NULL
)
7072 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7073 sig
, 1 /* is_debug_types */);
7074 if (dwo_entry
== NULL
)
7077 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7078 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7083 /* Lookup a signature based type for DW_FORM_ref_sig8.
7084 Returns NULL if signature SIG is not present in the table.
7085 It is up to the caller to complain about this. */
7087 static struct signatured_type
*
7088 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7090 struct dwarf2_per_objfile
*dwarf2_per_objfile
7091 = cu
->per_cu
->dwarf2_per_objfile
;
7094 && dwarf2_per_objfile
->using_index
)
7096 /* We're in a DWO/DWP file, and we're using .gdb_index.
7097 These cases require special processing. */
7098 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7099 return lookup_dwo_signatured_type (cu
, sig
);
7101 return lookup_dwp_signatured_type (cu
, sig
);
7105 struct signatured_type find_entry
, *entry
;
7107 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7109 find_entry
.signature
= sig
;
7110 entry
= ((struct signatured_type
*)
7111 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7116 /* Low level DIE reading support. */
7118 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7121 init_cu_die_reader (struct die_reader_specs
*reader
,
7122 struct dwarf2_cu
*cu
,
7123 struct dwarf2_section_info
*section
,
7124 struct dwo_file
*dwo_file
,
7125 struct abbrev_table
*abbrev_table
)
7127 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7128 reader
->abfd
= get_section_bfd_owner (section
);
7130 reader
->dwo_file
= dwo_file
;
7131 reader
->die_section
= section
;
7132 reader
->buffer
= section
->buffer
;
7133 reader
->buffer_end
= section
->buffer
+ section
->size
;
7134 reader
->comp_dir
= NULL
;
7135 reader
->abbrev_table
= abbrev_table
;
7138 /* Subroutine of init_cutu_and_read_dies to simplify it.
7139 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7140 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7143 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7144 from it to the DIE in the DWO. If NULL we are skipping the stub.
7145 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7146 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7147 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7148 STUB_COMP_DIR may be non-NULL.
7149 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7150 are filled in with the info of the DIE from the DWO file.
7151 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7152 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7153 kept around for at least as long as *RESULT_READER.
7155 The result is non-zero if a valid (non-dummy) DIE was found. */
7158 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7159 struct dwo_unit
*dwo_unit
,
7160 struct die_info
*stub_comp_unit_die
,
7161 const char *stub_comp_dir
,
7162 struct die_reader_specs
*result_reader
,
7163 const gdb_byte
**result_info_ptr
,
7164 struct die_info
**result_comp_unit_die
,
7165 int *result_has_children
,
7166 abbrev_table_up
*result_dwo_abbrev_table
)
7168 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7169 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7170 struct dwarf2_cu
*cu
= this_cu
->cu
;
7172 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7173 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7174 int i
,num_extra_attrs
;
7175 struct dwarf2_section_info
*dwo_abbrev_section
;
7176 struct attribute
*attr
;
7177 struct die_info
*comp_unit_die
;
7179 /* At most one of these may be provided. */
7180 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7182 /* These attributes aren't processed until later:
7183 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7184 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7185 referenced later. However, these attributes are found in the stub
7186 which we won't have later. In order to not impose this complication
7187 on the rest of the code, we read them here and copy them to the
7196 if (stub_comp_unit_die
!= NULL
)
7198 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7200 if (! this_cu
->is_debug_types
)
7201 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7202 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7203 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7204 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7205 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7207 /* There should be a DW_AT_addr_base attribute here (if needed).
7208 We need the value before we can process DW_FORM_GNU_addr_index. */
7210 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7212 cu
->addr_base
= DW_UNSND (attr
);
7214 /* There should be a DW_AT_ranges_base attribute here (if needed).
7215 We need the value before we can process DW_AT_ranges. */
7216 cu
->ranges_base
= 0;
7217 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7219 cu
->ranges_base
= DW_UNSND (attr
);
7221 else if (stub_comp_dir
!= NULL
)
7223 /* Reconstruct the comp_dir attribute to simplify the code below. */
7224 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7225 comp_dir
->name
= DW_AT_comp_dir
;
7226 comp_dir
->form
= DW_FORM_string
;
7227 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7228 DW_STRING (comp_dir
) = stub_comp_dir
;
7231 /* Set up for reading the DWO CU/TU. */
7232 cu
->dwo_unit
= dwo_unit
;
7233 dwarf2_section_info
*section
= dwo_unit
->section
;
7234 dwarf2_read_section (objfile
, section
);
7235 abfd
= get_section_bfd_owner (section
);
7236 begin_info_ptr
= info_ptr
= (section
->buffer
7237 + to_underlying (dwo_unit
->sect_off
));
7238 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7240 if (this_cu
->is_debug_types
)
7242 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7244 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7245 &cu
->header
, section
,
7247 info_ptr
, rcuh_kind::TYPE
);
7248 /* This is not an assert because it can be caused by bad debug info. */
7249 if (sig_type
->signature
!= cu
->header
.signature
)
7251 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7252 " TU at offset %s [in module %s]"),
7253 hex_string (sig_type
->signature
),
7254 hex_string (cu
->header
.signature
),
7255 sect_offset_str (dwo_unit
->sect_off
),
7256 bfd_get_filename (abfd
));
7258 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7259 /* For DWOs coming from DWP files, we don't know the CU length
7260 nor the type's offset in the TU until now. */
7261 dwo_unit
->length
= get_cu_length (&cu
->header
);
7262 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7264 /* Establish the type offset that can be used to lookup the type.
7265 For DWO files, we don't know it until now. */
7266 sig_type
->type_offset_in_section
7267 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7271 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7272 &cu
->header
, section
,
7274 info_ptr
, rcuh_kind::COMPILE
);
7275 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7276 /* For DWOs coming from DWP files, we don't know the CU length
7278 dwo_unit
->length
= get_cu_length (&cu
->header
);
7281 *result_dwo_abbrev_table
7282 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7283 cu
->header
.abbrev_sect_off
);
7284 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7285 result_dwo_abbrev_table
->get ());
7287 /* Read in the die, but leave space to copy over the attributes
7288 from the stub. This has the benefit of simplifying the rest of
7289 the code - all the work to maintain the illusion of a single
7290 DW_TAG_{compile,type}_unit DIE is done here. */
7291 num_extra_attrs
= ((stmt_list
!= NULL
)
7295 + (comp_dir
!= NULL
));
7296 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7297 result_has_children
, num_extra_attrs
);
7299 /* Copy over the attributes from the stub to the DIE we just read in. */
7300 comp_unit_die
= *result_comp_unit_die
;
7301 i
= comp_unit_die
->num_attrs
;
7302 if (stmt_list
!= NULL
)
7303 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7305 comp_unit_die
->attrs
[i
++] = *low_pc
;
7306 if (high_pc
!= NULL
)
7307 comp_unit_die
->attrs
[i
++] = *high_pc
;
7309 comp_unit_die
->attrs
[i
++] = *ranges
;
7310 if (comp_dir
!= NULL
)
7311 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7312 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7314 if (dwarf_die_debug
)
7316 fprintf_unfiltered (gdb_stdlog
,
7317 "Read die from %s@0x%x of %s:\n",
7318 get_section_name (section
),
7319 (unsigned) (begin_info_ptr
- section
->buffer
),
7320 bfd_get_filename (abfd
));
7321 dump_die (comp_unit_die
, dwarf_die_debug
);
7324 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7325 TUs by skipping the stub and going directly to the entry in the DWO file.
7326 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7327 to get it via circuitous means. Blech. */
7328 if (comp_dir
!= NULL
)
7329 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7331 /* Skip dummy compilation units. */
7332 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7333 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7336 *result_info_ptr
= info_ptr
;
7340 /* Subroutine of init_cutu_and_read_dies to simplify it.
7341 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7342 Returns NULL if the specified DWO unit cannot be found. */
7344 static struct dwo_unit
*
7345 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7346 struct die_info
*comp_unit_die
)
7348 struct dwarf2_cu
*cu
= this_cu
->cu
;
7350 struct dwo_unit
*dwo_unit
;
7351 const char *comp_dir
, *dwo_name
;
7353 gdb_assert (cu
!= NULL
);
7355 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7356 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7357 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7359 if (this_cu
->is_debug_types
)
7361 struct signatured_type
*sig_type
;
7363 /* Since this_cu is the first member of struct signatured_type,
7364 we can go from a pointer to one to a pointer to the other. */
7365 sig_type
= (struct signatured_type
*) this_cu
;
7366 signature
= sig_type
->signature
;
7367 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7371 struct attribute
*attr
;
7373 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7375 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7377 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7378 signature
= DW_UNSND (attr
);
7379 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7386 /* Subroutine of init_cutu_and_read_dies to simplify it.
7387 See it for a description of the parameters.
7388 Read a TU directly from a DWO file, bypassing the stub. */
7391 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7392 int use_existing_cu
, int keep
,
7393 die_reader_func_ftype
*die_reader_func
,
7396 std::unique_ptr
<dwarf2_cu
> new_cu
;
7397 struct signatured_type
*sig_type
;
7398 struct die_reader_specs reader
;
7399 const gdb_byte
*info_ptr
;
7400 struct die_info
*comp_unit_die
;
7402 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7404 /* Verify we can do the following downcast, and that we have the
7406 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7407 sig_type
= (struct signatured_type
*) this_cu
;
7408 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7410 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7412 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7413 /* There's no need to do the rereading_dwo_cu handling that
7414 init_cutu_and_read_dies does since we don't read the stub. */
7418 /* If !use_existing_cu, this_cu->cu must be NULL. */
7419 gdb_assert (this_cu
->cu
== NULL
);
7420 new_cu
.reset (new dwarf2_cu (this_cu
));
7423 /* A future optimization, if needed, would be to use an existing
7424 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7425 could share abbrev tables. */
7427 /* The abbreviation table used by READER, this must live at least as long as
7429 abbrev_table_up dwo_abbrev_table
;
7431 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7432 NULL
/* stub_comp_unit_die */,
7433 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7435 &comp_unit_die
, &has_children
,
7436 &dwo_abbrev_table
) == 0)
7442 /* All the "real" work is done here. */
7443 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7445 /* This duplicates the code in init_cutu_and_read_dies,
7446 but the alternative is making the latter more complex.
7447 This function is only for the special case of using DWO files directly:
7448 no point in overly complicating the general case just to handle this. */
7449 if (new_cu
!= NULL
&& keep
)
7451 /* Link this CU into read_in_chain. */
7452 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7453 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7454 /* The chain owns it now. */
7459 /* Initialize a CU (or TU) and read its DIEs.
7460 If the CU defers to a DWO file, read the DWO file as well.
7462 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7463 Otherwise the table specified in the comp unit header is read in and used.
7464 This is an optimization for when we already have the abbrev table.
7466 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7467 Otherwise, a new CU is allocated with xmalloc.
7469 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7470 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7472 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7473 linker) then DIE_READER_FUNC will not get called. */
7476 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7477 struct abbrev_table
*abbrev_table
,
7478 int use_existing_cu
, int keep
,
7479 die_reader_func_ftype
*die_reader_func
,
7482 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7483 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7484 struct dwarf2_section_info
*section
= this_cu
->section
;
7485 bfd
*abfd
= get_section_bfd_owner (section
);
7486 struct dwarf2_cu
*cu
;
7487 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7488 struct die_reader_specs reader
;
7489 struct die_info
*comp_unit_die
;
7491 struct attribute
*attr
;
7492 struct signatured_type
*sig_type
= NULL
;
7493 struct dwarf2_section_info
*abbrev_section
;
7494 /* Non-zero if CU currently points to a DWO file and we need to
7495 reread it. When this happens we need to reread the skeleton die
7496 before we can reread the DWO file (this only applies to CUs, not TUs). */
7497 int rereading_dwo_cu
= 0;
7499 if (dwarf_die_debug
)
7500 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7501 this_cu
->is_debug_types
? "type" : "comp",
7502 sect_offset_str (this_cu
->sect_off
));
7504 if (use_existing_cu
)
7507 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7508 file (instead of going through the stub), short-circuit all of this. */
7509 if (this_cu
->reading_dwo_directly
)
7511 /* Narrow down the scope of possibilities to have to understand. */
7512 gdb_assert (this_cu
->is_debug_types
);
7513 gdb_assert (abbrev_table
== NULL
);
7514 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7515 die_reader_func
, data
);
7519 /* This is cheap if the section is already read in. */
7520 dwarf2_read_section (objfile
, section
);
7522 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7524 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7526 std::unique_ptr
<dwarf2_cu
> new_cu
;
7527 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7530 /* If this CU is from a DWO file we need to start over, we need to
7531 refetch the attributes from the skeleton CU.
7532 This could be optimized by retrieving those attributes from when we
7533 were here the first time: the previous comp_unit_die was stored in
7534 comp_unit_obstack. But there's no data yet that we need this
7536 if (cu
->dwo_unit
!= NULL
)
7537 rereading_dwo_cu
= 1;
7541 /* If !use_existing_cu, this_cu->cu must be NULL. */
7542 gdb_assert (this_cu
->cu
== NULL
);
7543 new_cu
.reset (new dwarf2_cu (this_cu
));
7547 /* Get the header. */
7548 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7550 /* We already have the header, there's no need to read it in again. */
7551 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7555 if (this_cu
->is_debug_types
)
7557 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7558 &cu
->header
, section
,
7559 abbrev_section
, info_ptr
,
7562 /* Since per_cu is the first member of struct signatured_type,
7563 we can go from a pointer to one to a pointer to the other. */
7564 sig_type
= (struct signatured_type
*) this_cu
;
7565 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7566 gdb_assert (sig_type
->type_offset_in_tu
7567 == cu
->header
.type_cu_offset_in_tu
);
7568 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7570 /* LENGTH has not been set yet for type units if we're
7571 using .gdb_index. */
7572 this_cu
->length
= get_cu_length (&cu
->header
);
7574 /* Establish the type offset that can be used to lookup the type. */
7575 sig_type
->type_offset_in_section
=
7576 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7578 this_cu
->dwarf_version
= cu
->header
.version
;
7582 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7583 &cu
->header
, section
,
7586 rcuh_kind::COMPILE
);
7588 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7589 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7590 this_cu
->dwarf_version
= cu
->header
.version
;
7594 /* Skip dummy compilation units. */
7595 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7596 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7599 /* If we don't have them yet, read the abbrevs for this compilation unit.
7600 And if we need to read them now, make sure they're freed when we're
7601 done (own the table through ABBREV_TABLE_HOLDER). */
7602 abbrev_table_up abbrev_table_holder
;
7603 if (abbrev_table
!= NULL
)
7604 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7608 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7609 cu
->header
.abbrev_sect_off
);
7610 abbrev_table
= abbrev_table_holder
.get ();
7613 /* Read the top level CU/TU die. */
7614 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7615 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7617 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7618 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7619 table from the DWO file and pass the ownership over to us. It will be
7620 referenced from READER, so we must make sure to free it after we're done
7623 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7624 DWO CU, that this test will fail (the attribute will not be present). */
7625 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7626 abbrev_table_up dwo_abbrev_table
;
7629 struct dwo_unit
*dwo_unit
;
7630 struct die_info
*dwo_comp_unit_die
;
7634 complaint (&symfile_complaints
,
7635 _("compilation unit with DW_AT_GNU_dwo_name"
7636 " has children (offset %s) [in module %s]"),
7637 sect_offset_str (this_cu
->sect_off
),
7638 bfd_get_filename (abfd
));
7640 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7641 if (dwo_unit
!= NULL
)
7643 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7644 comp_unit_die
, NULL
,
7646 &dwo_comp_unit_die
, &has_children
,
7647 &dwo_abbrev_table
) == 0)
7652 comp_unit_die
= dwo_comp_unit_die
;
7656 /* Yikes, we couldn't find the rest of the DIE, we only have
7657 the stub. A complaint has already been logged. There's
7658 not much more we can do except pass on the stub DIE to
7659 die_reader_func. We don't want to throw an error on bad
7664 /* All of the above is setup for this call. Yikes. */
7665 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7667 /* Done, clean up. */
7668 if (new_cu
!= NULL
&& keep
)
7670 /* Link this CU into read_in_chain. */
7671 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7672 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7673 /* The chain owns it now. */
7678 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7679 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7680 to have already done the lookup to find the DWO file).
7682 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7683 THIS_CU->is_debug_types, but nothing else.
7685 We fill in THIS_CU->length.
7687 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7688 linker) then DIE_READER_FUNC will not get called.
7690 THIS_CU->cu is always freed when done.
7691 This is done in order to not leave THIS_CU->cu in a state where we have
7692 to care whether it refers to the "main" CU or the DWO CU. */
7695 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7696 struct dwo_file
*dwo_file
,
7697 die_reader_func_ftype
*die_reader_func
,
7700 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7701 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7702 struct dwarf2_section_info
*section
= this_cu
->section
;
7703 bfd
*abfd
= get_section_bfd_owner (section
);
7704 struct dwarf2_section_info
*abbrev_section
;
7705 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7706 struct die_reader_specs reader
;
7707 struct die_info
*comp_unit_die
;
7710 if (dwarf_die_debug
)
7711 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7712 this_cu
->is_debug_types
? "type" : "comp",
7713 sect_offset_str (this_cu
->sect_off
));
7715 gdb_assert (this_cu
->cu
== NULL
);
7717 abbrev_section
= (dwo_file
!= NULL
7718 ? &dwo_file
->sections
.abbrev
7719 : get_abbrev_section_for_cu (this_cu
));
7721 /* This is cheap if the section is already read in. */
7722 dwarf2_read_section (objfile
, section
);
7724 struct dwarf2_cu
cu (this_cu
);
7726 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7727 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7728 &cu
.header
, section
,
7729 abbrev_section
, info_ptr
,
7730 (this_cu
->is_debug_types
7732 : rcuh_kind::COMPILE
));
7734 this_cu
->length
= get_cu_length (&cu
.header
);
7736 /* Skip dummy compilation units. */
7737 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7738 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7741 abbrev_table_up abbrev_table
7742 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7743 cu
.header
.abbrev_sect_off
);
7745 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7746 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7748 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7751 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7752 does not lookup the specified DWO file.
7753 This cannot be used to read DWO files.
7755 THIS_CU->cu is always freed when done.
7756 This is done in order to not leave THIS_CU->cu in a state where we have
7757 to care whether it refers to the "main" CU or the DWO CU.
7758 We can revisit this if the data shows there's a performance issue. */
7761 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7762 die_reader_func_ftype
*die_reader_func
,
7765 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7768 /* Type Unit Groups.
7770 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7771 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7772 so that all types coming from the same compilation (.o file) are grouped
7773 together. A future step could be to put the types in the same symtab as
7774 the CU the types ultimately came from. */
7777 hash_type_unit_group (const void *item
)
7779 const struct type_unit_group
*tu_group
7780 = (const struct type_unit_group
*) item
;
7782 return hash_stmt_list_entry (&tu_group
->hash
);
7786 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7788 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7789 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7791 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7794 /* Allocate a hash table for type unit groups. */
7797 allocate_type_unit_groups_table (struct objfile
*objfile
)
7799 return htab_create_alloc_ex (3,
7800 hash_type_unit_group
,
7803 &objfile
->objfile_obstack
,
7804 hashtab_obstack_allocate
,
7805 dummy_obstack_deallocate
);
7808 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7809 partial symtabs. We combine several TUs per psymtab to not let the size
7810 of any one psymtab grow too big. */
7811 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7812 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7814 /* Helper routine for get_type_unit_group.
7815 Create the type_unit_group object used to hold one or more TUs. */
7817 static struct type_unit_group
*
7818 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7820 struct dwarf2_per_objfile
*dwarf2_per_objfile
7821 = cu
->per_cu
->dwarf2_per_objfile
;
7822 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7823 struct dwarf2_per_cu_data
*per_cu
;
7824 struct type_unit_group
*tu_group
;
7826 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7827 struct type_unit_group
);
7828 per_cu
= &tu_group
->per_cu
;
7829 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7831 if (dwarf2_per_objfile
->using_index
)
7833 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7834 struct dwarf2_per_cu_quick_data
);
7838 unsigned int line_offset
= to_underlying (line_offset_struct
);
7839 struct partial_symtab
*pst
;
7842 /* Give the symtab a useful name for debug purposes. */
7843 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7844 name
= xstrprintf ("<type_units_%d>",
7845 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7847 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7849 pst
= create_partial_symtab (per_cu
, name
);
7855 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7856 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7861 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7862 STMT_LIST is a DW_AT_stmt_list attribute. */
7864 static struct type_unit_group
*
7865 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7867 struct dwarf2_per_objfile
*dwarf2_per_objfile
7868 = cu
->per_cu
->dwarf2_per_objfile
;
7869 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7870 struct type_unit_group
*tu_group
;
7872 unsigned int line_offset
;
7873 struct type_unit_group type_unit_group_for_lookup
;
7875 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7877 dwarf2_per_objfile
->type_unit_groups
=
7878 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7881 /* Do we need to create a new group, or can we use an existing one? */
7885 line_offset
= DW_UNSND (stmt_list
);
7886 ++tu_stats
->nr_symtab_sharers
;
7890 /* Ugh, no stmt_list. Rare, but we have to handle it.
7891 We can do various things here like create one group per TU or
7892 spread them over multiple groups to split up the expansion work.
7893 To avoid worst case scenarios (too many groups or too large groups)
7894 we, umm, group them in bunches. */
7895 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7896 | (tu_stats
->nr_stmt_less_type_units
7897 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7898 ++tu_stats
->nr_stmt_less_type_units
;
7901 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7902 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7903 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7904 &type_unit_group_for_lookup
, INSERT
);
7907 tu_group
= (struct type_unit_group
*) *slot
;
7908 gdb_assert (tu_group
!= NULL
);
7912 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7913 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7915 ++tu_stats
->nr_symtabs
;
7921 /* Partial symbol tables. */
7923 /* Create a psymtab named NAME and assign it to PER_CU.
7925 The caller must fill in the following details:
7926 dirname, textlow, texthigh. */
7928 static struct partial_symtab
*
7929 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7931 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7932 struct partial_symtab
*pst
;
7934 pst
= start_psymtab_common (objfile
, name
, 0,
7935 objfile
->global_psymbols
,
7936 objfile
->static_psymbols
);
7938 pst
->psymtabs_addrmap_supported
= 1;
7940 /* This is the glue that links PST into GDB's symbol API. */
7941 pst
->read_symtab_private
= per_cu
;
7942 pst
->read_symtab
= dwarf2_read_symtab
;
7943 per_cu
->v
.psymtab
= pst
;
7948 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7951 struct process_psymtab_comp_unit_data
7953 /* True if we are reading a DW_TAG_partial_unit. */
7955 int want_partial_unit
;
7957 /* The "pretend" language that is used if the CU doesn't declare a
7960 enum language pretend_language
;
7963 /* die_reader_func for process_psymtab_comp_unit. */
7966 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7967 const gdb_byte
*info_ptr
,
7968 struct die_info
*comp_unit_die
,
7972 struct dwarf2_cu
*cu
= reader
->cu
;
7973 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7974 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7975 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7977 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7978 struct partial_symtab
*pst
;
7979 enum pc_bounds_kind cu_bounds_kind
;
7980 const char *filename
;
7981 struct process_psymtab_comp_unit_data
*info
7982 = (struct process_psymtab_comp_unit_data
*) data
;
7984 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7987 gdb_assert (! per_cu
->is_debug_types
);
7989 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7991 cu
->list_in_scope
= &file_symbols
;
7993 /* Allocate a new partial symbol table structure. */
7994 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7995 if (filename
== NULL
)
7998 pst
= create_partial_symtab (per_cu
, filename
);
8000 /* This must be done before calling dwarf2_build_include_psymtabs. */
8001 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
8003 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8005 dwarf2_find_base_address (comp_unit_die
, cu
);
8007 /* Possibly set the default values of LOWPC and HIGHPC from
8009 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
8010 &best_highpc
, cu
, pst
);
8011 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8012 /* Store the contiguous range if it is not empty; it can be empty for
8013 CUs with no code. */
8014 addrmap_set_empty (objfile
->psymtabs_addrmap
,
8015 gdbarch_adjust_dwarf2_addr (gdbarch
,
8016 best_lowpc
+ baseaddr
),
8017 gdbarch_adjust_dwarf2_addr (gdbarch
,
8018 best_highpc
+ baseaddr
) - 1,
8021 /* Check if comp unit has_children.
8022 If so, read the rest of the partial symbols from this comp unit.
8023 If not, there's no more debug_info for this comp unit. */
8026 struct partial_die_info
*first_die
;
8027 CORE_ADDR lowpc
, highpc
;
8029 lowpc
= ((CORE_ADDR
) -1);
8030 highpc
= ((CORE_ADDR
) 0);
8032 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8034 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8035 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8037 /* If we didn't find a lowpc, set it to highpc to avoid
8038 complaints from `maint check'. */
8039 if (lowpc
== ((CORE_ADDR
) -1))
8042 /* If the compilation unit didn't have an explicit address range,
8043 then use the information extracted from its child dies. */
8044 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8047 best_highpc
= highpc
;
8050 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
8051 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
8053 end_psymtab_common (objfile
, pst
);
8055 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8058 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8059 struct dwarf2_per_cu_data
*iter
;
8061 /* Fill in 'dependencies' here; we fill in 'users' in a
8063 pst
->number_of_dependencies
= len
;
8065 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8067 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8070 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8072 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8075 /* Get the list of files included in the current compilation unit,
8076 and build a psymtab for each of them. */
8077 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8079 if (dwarf_read_debug
)
8081 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8083 fprintf_unfiltered (gdb_stdlog
,
8084 "Psymtab for %s unit @%s: %s - %s"
8085 ", %d global, %d static syms\n",
8086 per_cu
->is_debug_types
? "type" : "comp",
8087 sect_offset_str (per_cu
->sect_off
),
8088 paddress (gdbarch
, pst
->textlow
),
8089 paddress (gdbarch
, pst
->texthigh
),
8090 pst
->n_global_syms
, pst
->n_static_syms
);
8094 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8095 Process compilation unit THIS_CU for a psymtab. */
8098 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8099 int want_partial_unit
,
8100 enum language pretend_language
)
8102 /* If this compilation unit was already read in, free the
8103 cached copy in order to read it in again. This is
8104 necessary because we skipped some symbols when we first
8105 read in the compilation unit (see load_partial_dies).
8106 This problem could be avoided, but the benefit is unclear. */
8107 if (this_cu
->cu
!= NULL
)
8108 free_one_cached_comp_unit (this_cu
);
8110 if (this_cu
->is_debug_types
)
8111 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
8115 process_psymtab_comp_unit_data info
;
8116 info
.want_partial_unit
= want_partial_unit
;
8117 info
.pretend_language
= pretend_language
;
8118 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
8119 process_psymtab_comp_unit_reader
, &info
);
8122 /* Age out any secondary CUs. */
8123 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8126 /* Reader function for build_type_psymtabs. */
8129 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8130 const gdb_byte
*info_ptr
,
8131 struct die_info
*type_unit_die
,
8135 struct dwarf2_per_objfile
*dwarf2_per_objfile
8136 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8137 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8138 struct dwarf2_cu
*cu
= reader
->cu
;
8139 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8140 struct signatured_type
*sig_type
;
8141 struct type_unit_group
*tu_group
;
8142 struct attribute
*attr
;
8143 struct partial_die_info
*first_die
;
8144 CORE_ADDR lowpc
, highpc
;
8145 struct partial_symtab
*pst
;
8147 gdb_assert (data
== NULL
);
8148 gdb_assert (per_cu
->is_debug_types
);
8149 sig_type
= (struct signatured_type
*) per_cu
;
8154 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8155 tu_group
= get_type_unit_group (cu
, attr
);
8157 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8159 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8160 cu
->list_in_scope
= &file_symbols
;
8161 pst
= create_partial_symtab (per_cu
, "");
8164 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8166 lowpc
= (CORE_ADDR
) -1;
8167 highpc
= (CORE_ADDR
) 0;
8168 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8170 end_psymtab_common (objfile
, pst
);
8173 /* Struct used to sort TUs by their abbreviation table offset. */
8175 struct tu_abbrev_offset
8177 struct signatured_type
*sig_type
;
8178 sect_offset abbrev_offset
;
8181 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8184 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8185 const struct tu_abbrev_offset
&b
)
8187 return a
.abbrev_offset
< b
.abbrev_offset
;
8190 /* Efficiently read all the type units.
8191 This does the bulk of the work for build_type_psymtabs.
8193 The efficiency is because we sort TUs by the abbrev table they use and
8194 only read each abbrev table once. In one program there are 200K TUs
8195 sharing 8K abbrev tables.
8197 The main purpose of this function is to support building the
8198 dwarf2_per_objfile->type_unit_groups table.
8199 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8200 can collapse the search space by grouping them by stmt_list.
8201 The savings can be significant, in the same program from above the 200K TUs
8202 share 8K stmt_list tables.
8204 FUNC is expected to call get_type_unit_group, which will create the
8205 struct type_unit_group if necessary and add it to
8206 dwarf2_per_objfile->type_unit_groups. */
8209 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8211 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8212 abbrev_table_up abbrev_table
;
8213 sect_offset abbrev_offset
;
8216 /* It's up to the caller to not call us multiple times. */
8217 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8219 if (dwarf2_per_objfile
->n_type_units
== 0)
8222 /* TUs typically share abbrev tables, and there can be way more TUs than
8223 abbrev tables. Sort by abbrev table to reduce the number of times we
8224 read each abbrev table in.
8225 Alternatives are to punt or to maintain a cache of abbrev tables.
8226 This is simpler and efficient enough for now.
8228 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8229 symtab to use). Typically TUs with the same abbrev offset have the same
8230 stmt_list value too so in practice this should work well.
8232 The basic algorithm here is:
8234 sort TUs by abbrev table
8235 for each TU with same abbrev table:
8236 read abbrev table if first user
8237 read TU top level DIE
8238 [IWBN if DWO skeletons had DW_AT_stmt_list]
8241 if (dwarf_read_debug
)
8242 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8244 /* Sort in a separate table to maintain the order of all_type_units
8245 for .gdb_index: TU indices directly index all_type_units. */
8246 std::vector
<struct tu_abbrev_offset
> sorted_by_abbrev
8247 (dwarf2_per_objfile
->n_type_units
);
8248 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
8250 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
8252 sorted_by_abbrev
[i
].sig_type
= sig_type
;
8253 sorted_by_abbrev
[i
].abbrev_offset
=
8254 read_abbrev_offset (dwarf2_per_objfile
,
8255 sig_type
->per_cu
.section
,
8256 sig_type
->per_cu
.sect_off
);
8258 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8259 sort_tu_by_abbrev_offset
);
8261 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8263 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
8265 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
8267 /* Switch to the next abbrev table if necessary. */
8268 if (abbrev_table
== NULL
8269 || tu
->abbrev_offset
!= abbrev_offset
)
8271 abbrev_offset
= tu
->abbrev_offset
;
8273 abbrev_table_read_table (dwarf2_per_objfile
,
8274 &dwarf2_per_objfile
->abbrev
,
8276 ++tu_stats
->nr_uniq_abbrev_tables
;
8279 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
.get (),
8280 0, 0, build_type_psymtabs_reader
, NULL
);
8284 /* Print collected type unit statistics. */
8287 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8289 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8291 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8292 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
8293 dwarf2_per_objfile
->n_type_units
);
8294 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8295 tu_stats
->nr_uniq_abbrev_tables
);
8296 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8297 tu_stats
->nr_symtabs
);
8298 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8299 tu_stats
->nr_symtab_sharers
);
8300 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8301 tu_stats
->nr_stmt_less_type_units
);
8302 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8303 tu_stats
->nr_all_type_units_reallocs
);
8306 /* Traversal function for build_type_psymtabs. */
8309 build_type_psymtab_dependencies (void **slot
, void *info
)
8311 struct dwarf2_per_objfile
*dwarf2_per_objfile
8312 = (struct dwarf2_per_objfile
*) info
;
8313 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8314 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8315 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8316 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8317 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8318 struct signatured_type
*iter
;
8321 gdb_assert (len
> 0);
8322 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8324 pst
->number_of_dependencies
= len
;
8326 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8328 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8331 gdb_assert (iter
->per_cu
.is_debug_types
);
8332 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8333 iter
->type_unit_group
= tu_group
;
8336 VEC_free (sig_type_ptr
, tu_group
->tus
);
8341 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8342 Build partial symbol tables for the .debug_types comp-units. */
8345 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8347 if (! create_all_type_units (dwarf2_per_objfile
))
8350 build_type_psymtabs_1 (dwarf2_per_objfile
);
8353 /* Traversal function for process_skeletonless_type_unit.
8354 Read a TU in a DWO file and build partial symbols for it. */
8357 process_skeletonless_type_unit (void **slot
, void *info
)
8359 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8360 struct dwarf2_per_objfile
*dwarf2_per_objfile
8361 = (struct dwarf2_per_objfile
*) info
;
8362 struct signatured_type find_entry
, *entry
;
8364 /* If this TU doesn't exist in the global table, add it and read it in. */
8366 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8368 dwarf2_per_objfile
->signatured_types
8369 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8372 find_entry
.signature
= dwo_unit
->signature
;
8373 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8375 /* If we've already seen this type there's nothing to do. What's happening
8376 is we're doing our own version of comdat-folding here. */
8380 /* This does the job that create_all_type_units would have done for
8382 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8383 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8386 /* This does the job that build_type_psymtabs_1 would have done. */
8387 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
8388 build_type_psymtabs_reader
, NULL
);
8393 /* Traversal function for process_skeletonless_type_units. */
8396 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8398 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8400 if (dwo_file
->tus
!= NULL
)
8402 htab_traverse_noresize (dwo_file
->tus
,
8403 process_skeletonless_type_unit
, info
);
8409 /* Scan all TUs of DWO files, verifying we've processed them.
8410 This is needed in case a TU was emitted without its skeleton.
8411 Note: This can't be done until we know what all the DWO files are. */
8414 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8416 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8417 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8418 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8420 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8421 process_dwo_file_for_skeletonless_type_units
,
8422 dwarf2_per_objfile
);
8426 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8429 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8433 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
8435 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
8436 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8442 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8444 /* Set the 'user' field only if it is not already set. */
8445 if (pst
->dependencies
[j
]->user
== NULL
)
8446 pst
->dependencies
[j
]->user
= pst
;
8451 /* Build the partial symbol table by doing a quick pass through the
8452 .debug_info and .debug_abbrev sections. */
8455 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8458 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8460 if (dwarf_read_debug
)
8462 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8463 objfile_name (objfile
));
8466 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8468 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8470 /* Any cached compilation units will be linked by the per-objfile
8471 read_in_chain. Make sure to free them when we're done. */
8472 free_cached_comp_units
freer (dwarf2_per_objfile
);
8474 build_type_psymtabs (dwarf2_per_objfile
);
8476 create_all_comp_units (dwarf2_per_objfile
);
8478 /* Create a temporary address map on a temporary obstack. We later
8479 copy this to the final obstack. */
8480 auto_obstack temp_obstack
;
8482 scoped_restore save_psymtabs_addrmap
8483 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8484 addrmap_create_mutable (&temp_obstack
));
8486 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
8488 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (dwarf2_per_objfile
, i
);
8490 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8493 /* This has to wait until we read the CUs, we need the list of DWOs. */
8494 process_skeletonless_type_units (dwarf2_per_objfile
);
8496 /* Now that all TUs have been processed we can fill in the dependencies. */
8497 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8499 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8500 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8503 if (dwarf_read_debug
)
8504 print_tu_stats (dwarf2_per_objfile
);
8506 set_partial_user (dwarf2_per_objfile
);
8508 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8509 &objfile
->objfile_obstack
);
8510 /* At this point we want to keep the address map. */
8511 save_psymtabs_addrmap
.release ();
8513 if (dwarf_read_debug
)
8514 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8515 objfile_name (objfile
));
8518 /* die_reader_func for load_partial_comp_unit. */
8521 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8522 const gdb_byte
*info_ptr
,
8523 struct die_info
*comp_unit_die
,
8527 struct dwarf2_cu
*cu
= reader
->cu
;
8529 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8531 /* Check if comp unit has_children.
8532 If so, read the rest of the partial symbols from this comp unit.
8533 If not, there's no more debug_info for this comp unit. */
8535 load_partial_dies (reader
, info_ptr
, 0);
8538 /* Load the partial DIEs for a secondary CU into memory.
8539 This is also used when rereading a primary CU with load_all_dies. */
8542 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8544 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8545 load_partial_comp_unit_reader
, NULL
);
8549 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8550 struct dwarf2_section_info
*section
,
8551 struct dwarf2_section_info
*abbrev_section
,
8552 unsigned int is_dwz
,
8555 struct dwarf2_per_cu_data
***all_comp_units
)
8557 const gdb_byte
*info_ptr
;
8558 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8560 if (dwarf_read_debug
)
8561 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8562 get_section_name (section
),
8563 get_section_file_name (section
));
8565 dwarf2_read_section (objfile
, section
);
8567 info_ptr
= section
->buffer
;
8569 while (info_ptr
< section
->buffer
+ section
->size
)
8571 struct dwarf2_per_cu_data
*this_cu
;
8573 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8575 comp_unit_head cu_header
;
8576 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8577 abbrev_section
, info_ptr
,
8578 rcuh_kind::COMPILE
);
8580 /* Save the compilation unit for later lookup. */
8581 if (cu_header
.unit_type
!= DW_UT_type
)
8583 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8584 struct dwarf2_per_cu_data
);
8585 memset (this_cu
, 0, sizeof (*this_cu
));
8589 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8590 struct signatured_type
);
8591 memset (sig_type
, 0, sizeof (*sig_type
));
8592 sig_type
->signature
= cu_header
.signature
;
8593 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8594 this_cu
= &sig_type
->per_cu
;
8596 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8597 this_cu
->sect_off
= sect_off
;
8598 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8599 this_cu
->is_dwz
= is_dwz
;
8600 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8601 this_cu
->section
= section
;
8603 if (*n_comp_units
== *n_allocated
)
8606 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
8607 *all_comp_units
, *n_allocated
);
8609 (*all_comp_units
)[*n_comp_units
] = this_cu
;
8612 info_ptr
= info_ptr
+ this_cu
->length
;
8616 /* Create a list of all compilation units in OBJFILE.
8617 This is only done for -readnow and building partial symtabs. */
8620 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8624 struct dwarf2_per_cu_data
**all_comp_units
;
8625 struct dwz_file
*dwz
;
8626 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8630 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
8632 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8633 &dwarf2_per_objfile
->abbrev
, 0,
8634 &n_allocated
, &n_comp_units
, &all_comp_units
);
8636 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8638 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8639 1, &n_allocated
, &n_comp_units
,
8642 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
8643 struct dwarf2_per_cu_data
*,
8645 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
8646 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
8647 xfree (all_comp_units
);
8648 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
8651 /* Process all loaded DIEs for compilation unit CU, starting at
8652 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8653 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8654 DW_AT_ranges). See the comments of add_partial_subprogram on how
8655 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8658 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8659 CORE_ADDR
*highpc
, int set_addrmap
,
8660 struct dwarf2_cu
*cu
)
8662 struct partial_die_info
*pdi
;
8664 /* Now, march along the PDI's, descending into ones which have
8665 interesting children but skipping the children of the other ones,
8666 until we reach the end of the compilation unit. */
8674 /* Anonymous namespaces or modules have no name but have interesting
8675 children, so we need to look at them. Ditto for anonymous
8678 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8679 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8680 || pdi
->tag
== DW_TAG_imported_unit
8681 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8685 case DW_TAG_subprogram
:
8686 case DW_TAG_inlined_subroutine
:
8687 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8689 case DW_TAG_constant
:
8690 case DW_TAG_variable
:
8691 case DW_TAG_typedef
:
8692 case DW_TAG_union_type
:
8693 if (!pdi
->is_declaration
)
8695 add_partial_symbol (pdi
, cu
);
8698 case DW_TAG_class_type
:
8699 case DW_TAG_interface_type
:
8700 case DW_TAG_structure_type
:
8701 if (!pdi
->is_declaration
)
8703 add_partial_symbol (pdi
, cu
);
8705 if ((cu
->language
== language_rust
8706 || cu
->language
== language_cplus
) && pdi
->has_children
)
8707 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8710 case DW_TAG_enumeration_type
:
8711 if (!pdi
->is_declaration
)
8712 add_partial_enumeration (pdi
, cu
);
8714 case DW_TAG_base_type
:
8715 case DW_TAG_subrange_type
:
8716 /* File scope base type definitions are added to the partial
8718 add_partial_symbol (pdi
, cu
);
8720 case DW_TAG_namespace
:
8721 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8724 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8726 case DW_TAG_imported_unit
:
8728 struct dwarf2_per_cu_data
*per_cu
;
8730 /* For now we don't handle imported units in type units. */
8731 if (cu
->per_cu
->is_debug_types
)
8733 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8734 " supported in type units [in module %s]"),
8735 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8738 per_cu
= dwarf2_find_containing_comp_unit
8739 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8740 cu
->per_cu
->dwarf2_per_objfile
);
8742 /* Go read the partial unit, if needed. */
8743 if (per_cu
->v
.psymtab
== NULL
)
8744 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8746 VEC_safe_push (dwarf2_per_cu_ptr
,
8747 cu
->per_cu
->imported_symtabs
, per_cu
);
8750 case DW_TAG_imported_declaration
:
8751 add_partial_symbol (pdi
, cu
);
8758 /* If the die has a sibling, skip to the sibling. */
8760 pdi
= pdi
->die_sibling
;
8764 /* Functions used to compute the fully scoped name of a partial DIE.
8766 Normally, this is simple. For C++, the parent DIE's fully scoped
8767 name is concatenated with "::" and the partial DIE's name.
8768 Enumerators are an exception; they use the scope of their parent
8769 enumeration type, i.e. the name of the enumeration type is not
8770 prepended to the enumerator.
8772 There are two complexities. One is DW_AT_specification; in this
8773 case "parent" means the parent of the target of the specification,
8774 instead of the direct parent of the DIE. The other is compilers
8775 which do not emit DW_TAG_namespace; in this case we try to guess
8776 the fully qualified name of structure types from their members'
8777 linkage names. This must be done using the DIE's children rather
8778 than the children of any DW_AT_specification target. We only need
8779 to do this for structures at the top level, i.e. if the target of
8780 any DW_AT_specification (if any; otherwise the DIE itself) does not
8783 /* Compute the scope prefix associated with PDI's parent, in
8784 compilation unit CU. The result will be allocated on CU's
8785 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8786 field. NULL is returned if no prefix is necessary. */
8788 partial_die_parent_scope (struct partial_die_info
*pdi
,
8789 struct dwarf2_cu
*cu
)
8791 const char *grandparent_scope
;
8792 struct partial_die_info
*parent
, *real_pdi
;
8794 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8795 then this means the parent of the specification DIE. */
8798 while (real_pdi
->has_specification
)
8799 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8800 real_pdi
->spec_is_dwz
, cu
);
8802 parent
= real_pdi
->die_parent
;
8806 if (parent
->scope_set
)
8807 return parent
->scope
;
8811 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8813 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8814 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8815 Work around this problem here. */
8816 if (cu
->language
== language_cplus
8817 && parent
->tag
== DW_TAG_namespace
8818 && strcmp (parent
->name
, "::") == 0
8819 && grandparent_scope
== NULL
)
8821 parent
->scope
= NULL
;
8822 parent
->scope_set
= 1;
8826 if (pdi
->tag
== DW_TAG_enumerator
)
8827 /* Enumerators should not get the name of the enumeration as a prefix. */
8828 parent
->scope
= grandparent_scope
;
8829 else if (parent
->tag
== DW_TAG_namespace
8830 || parent
->tag
== DW_TAG_module
8831 || parent
->tag
== DW_TAG_structure_type
8832 || parent
->tag
== DW_TAG_class_type
8833 || parent
->tag
== DW_TAG_interface_type
8834 || parent
->tag
== DW_TAG_union_type
8835 || parent
->tag
== DW_TAG_enumeration_type
)
8837 if (grandparent_scope
== NULL
)
8838 parent
->scope
= parent
->name
;
8840 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8842 parent
->name
, 0, cu
);
8846 /* FIXME drow/2004-04-01: What should we be doing with
8847 function-local names? For partial symbols, we should probably be
8849 complaint (&symfile_complaints
,
8850 _("unhandled containing DIE tag %d for DIE at %s"),
8851 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8852 parent
->scope
= grandparent_scope
;
8855 parent
->scope_set
= 1;
8856 return parent
->scope
;
8859 /* Return the fully scoped name associated with PDI, from compilation unit
8860 CU. The result will be allocated with malloc. */
8863 partial_die_full_name (struct partial_die_info
*pdi
,
8864 struct dwarf2_cu
*cu
)
8866 const char *parent_scope
;
8868 /* If this is a template instantiation, we can not work out the
8869 template arguments from partial DIEs. So, unfortunately, we have
8870 to go through the full DIEs. At least any work we do building
8871 types here will be reused if full symbols are loaded later. */
8872 if (pdi
->has_template_arguments
)
8876 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8878 struct die_info
*die
;
8879 struct attribute attr
;
8880 struct dwarf2_cu
*ref_cu
= cu
;
8882 /* DW_FORM_ref_addr is using section offset. */
8883 attr
.name
= (enum dwarf_attribute
) 0;
8884 attr
.form
= DW_FORM_ref_addr
;
8885 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8886 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8888 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8892 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8893 if (parent_scope
== NULL
)
8896 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8900 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8902 struct dwarf2_per_objfile
*dwarf2_per_objfile
8903 = cu
->per_cu
->dwarf2_per_objfile
;
8904 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8905 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8907 const char *actual_name
= NULL
;
8909 char *built_actual_name
;
8911 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8913 built_actual_name
= partial_die_full_name (pdi
, cu
);
8914 if (built_actual_name
!= NULL
)
8915 actual_name
= built_actual_name
;
8917 if (actual_name
== NULL
)
8918 actual_name
= pdi
->name
;
8922 case DW_TAG_inlined_subroutine
:
8923 case DW_TAG_subprogram
:
8924 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8925 if (pdi
->is_external
|| cu
->language
== language_ada
)
8927 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8928 of the global scope. But in Ada, we want to be able to access
8929 nested procedures globally. So all Ada subprograms are stored
8930 in the global scope. */
8931 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8932 built_actual_name
!= NULL
,
8933 VAR_DOMAIN
, LOC_BLOCK
,
8934 &objfile
->global_psymbols
,
8935 addr
, cu
->language
, objfile
);
8939 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8940 built_actual_name
!= NULL
,
8941 VAR_DOMAIN
, LOC_BLOCK
,
8942 &objfile
->static_psymbols
,
8943 addr
, cu
->language
, objfile
);
8946 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8947 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8949 case DW_TAG_constant
:
8951 std::vector
<partial_symbol
*> *list
;
8953 if (pdi
->is_external
)
8954 list
= &objfile
->global_psymbols
;
8956 list
= &objfile
->static_psymbols
;
8957 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8958 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8959 list
, 0, cu
->language
, objfile
);
8962 case DW_TAG_variable
:
8964 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8968 && !dwarf2_per_objfile
->has_section_at_zero
)
8970 /* A global or static variable may also have been stripped
8971 out by the linker if unused, in which case its address
8972 will be nullified; do not add such variables into partial
8973 symbol table then. */
8975 else if (pdi
->is_external
)
8978 Don't enter into the minimal symbol tables as there is
8979 a minimal symbol table entry from the ELF symbols already.
8980 Enter into partial symbol table if it has a location
8981 descriptor or a type.
8982 If the location descriptor is missing, new_symbol will create
8983 a LOC_UNRESOLVED symbol, the address of the variable will then
8984 be determined from the minimal symbol table whenever the variable
8986 The address for the partial symbol table entry is not
8987 used by GDB, but it comes in handy for debugging partial symbol
8990 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8991 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8992 built_actual_name
!= NULL
,
8993 VAR_DOMAIN
, LOC_STATIC
,
8994 &objfile
->global_psymbols
,
8996 cu
->language
, objfile
);
9000 int has_loc
= pdi
->d
.locdesc
!= NULL
;
9002 /* Static Variable. Skip symbols whose value we cannot know (those
9003 without location descriptors or constant values). */
9004 if (!has_loc
&& !pdi
->has_const_value
)
9006 xfree (built_actual_name
);
9010 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9011 built_actual_name
!= NULL
,
9012 VAR_DOMAIN
, LOC_STATIC
,
9013 &objfile
->static_psymbols
,
9014 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
9015 cu
->language
, objfile
);
9018 case DW_TAG_typedef
:
9019 case DW_TAG_base_type
:
9020 case DW_TAG_subrange_type
:
9021 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9022 built_actual_name
!= NULL
,
9023 VAR_DOMAIN
, LOC_TYPEDEF
,
9024 &objfile
->static_psymbols
,
9025 0, cu
->language
, objfile
);
9027 case DW_TAG_imported_declaration
:
9028 case DW_TAG_namespace
:
9029 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9030 built_actual_name
!= NULL
,
9031 VAR_DOMAIN
, LOC_TYPEDEF
,
9032 &objfile
->global_psymbols
,
9033 0, cu
->language
, objfile
);
9036 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9037 built_actual_name
!= NULL
,
9038 MODULE_DOMAIN
, LOC_TYPEDEF
,
9039 &objfile
->global_psymbols
,
9040 0, cu
->language
, objfile
);
9042 case DW_TAG_class_type
:
9043 case DW_TAG_interface_type
:
9044 case DW_TAG_structure_type
:
9045 case DW_TAG_union_type
:
9046 case DW_TAG_enumeration_type
:
9047 /* Skip external references. The DWARF standard says in the section
9048 about "Structure, Union, and Class Type Entries": "An incomplete
9049 structure, union or class type is represented by a structure,
9050 union or class entry that does not have a byte size attribute
9051 and that has a DW_AT_declaration attribute." */
9052 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9054 xfree (built_actual_name
);
9058 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9059 static vs. global. */
9060 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9061 built_actual_name
!= NULL
,
9062 STRUCT_DOMAIN
, LOC_TYPEDEF
,
9063 cu
->language
== language_cplus
9064 ? &objfile
->global_psymbols
9065 : &objfile
->static_psymbols
,
9066 0, cu
->language
, objfile
);
9069 case DW_TAG_enumerator
:
9070 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9071 built_actual_name
!= NULL
,
9072 VAR_DOMAIN
, LOC_CONST
,
9073 cu
->language
== language_cplus
9074 ? &objfile
->global_psymbols
9075 : &objfile
->static_psymbols
,
9076 0, cu
->language
, objfile
);
9082 xfree (built_actual_name
);
9085 /* Read a partial die corresponding to a namespace; also, add a symbol
9086 corresponding to that namespace to the symbol table. NAMESPACE is
9087 the name of the enclosing namespace. */
9090 add_partial_namespace (struct partial_die_info
*pdi
,
9091 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9092 int set_addrmap
, struct dwarf2_cu
*cu
)
9094 /* Add a symbol for the namespace. */
9096 add_partial_symbol (pdi
, cu
);
9098 /* Now scan partial symbols in that namespace. */
9100 if (pdi
->has_children
)
9101 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9104 /* Read a partial die corresponding to a Fortran module. */
9107 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9108 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9110 /* Add a symbol for the namespace. */
9112 add_partial_symbol (pdi
, cu
);
9114 /* Now scan partial symbols in that module. */
9116 if (pdi
->has_children
)
9117 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9120 /* Read a partial die corresponding to a subprogram or an inlined
9121 subprogram and create a partial symbol for that subprogram.
9122 When the CU language allows it, this routine also defines a partial
9123 symbol for each nested subprogram that this subprogram contains.
9124 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9125 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9127 PDI may also be a lexical block, in which case we simply search
9128 recursively for subprograms defined inside that lexical block.
9129 Again, this is only performed when the CU language allows this
9130 type of definitions. */
9133 add_partial_subprogram (struct partial_die_info
*pdi
,
9134 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9135 int set_addrmap
, struct dwarf2_cu
*cu
)
9137 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9139 if (pdi
->has_pc_info
)
9141 if (pdi
->lowpc
< *lowpc
)
9142 *lowpc
= pdi
->lowpc
;
9143 if (pdi
->highpc
> *highpc
)
9144 *highpc
= pdi
->highpc
;
9147 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9148 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9153 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9154 SECT_OFF_TEXT (objfile
));
9155 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9156 pdi
->lowpc
+ baseaddr
);
9157 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9158 pdi
->highpc
+ baseaddr
);
9159 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9160 cu
->per_cu
->v
.psymtab
);
9164 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9166 if (!pdi
->is_declaration
)
9167 /* Ignore subprogram DIEs that do not have a name, they are
9168 illegal. Do not emit a complaint at this point, we will
9169 do so when we convert this psymtab into a symtab. */
9171 add_partial_symbol (pdi
, cu
);
9175 if (! pdi
->has_children
)
9178 if (cu
->language
== language_ada
)
9180 pdi
= pdi
->die_child
;
9184 if (pdi
->tag
== DW_TAG_subprogram
9185 || pdi
->tag
== DW_TAG_inlined_subroutine
9186 || pdi
->tag
== DW_TAG_lexical_block
)
9187 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9188 pdi
= pdi
->die_sibling
;
9193 /* Read a partial die corresponding to an enumeration type. */
9196 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9197 struct dwarf2_cu
*cu
)
9199 struct partial_die_info
*pdi
;
9201 if (enum_pdi
->name
!= NULL
)
9202 add_partial_symbol (enum_pdi
, cu
);
9204 pdi
= enum_pdi
->die_child
;
9207 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9208 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
9210 add_partial_symbol (pdi
, cu
);
9211 pdi
= pdi
->die_sibling
;
9215 /* Return the initial uleb128 in the die at INFO_PTR. */
9218 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9220 unsigned int bytes_read
;
9222 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9225 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9226 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9228 Return the corresponding abbrev, or NULL if the number is zero (indicating
9229 an empty DIE). In either case *BYTES_READ will be set to the length of
9230 the initial number. */
9232 static struct abbrev_info
*
9233 peek_die_abbrev (const die_reader_specs
&reader
,
9234 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9236 dwarf2_cu
*cu
= reader
.cu
;
9237 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9238 unsigned int abbrev_number
9239 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9241 if (abbrev_number
== 0)
9244 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9247 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9248 " at offset %s [in module %s]"),
9249 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9250 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9256 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9257 Returns a pointer to the end of a series of DIEs, terminated by an empty
9258 DIE. Any children of the skipped DIEs will also be skipped. */
9260 static const gdb_byte
*
9261 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9265 unsigned int bytes_read
;
9266 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9269 return info_ptr
+ bytes_read
;
9271 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9275 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9276 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9277 abbrev corresponding to that skipped uleb128 should be passed in
9278 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9281 static const gdb_byte
*
9282 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9283 struct abbrev_info
*abbrev
)
9285 unsigned int bytes_read
;
9286 struct attribute attr
;
9287 bfd
*abfd
= reader
->abfd
;
9288 struct dwarf2_cu
*cu
= reader
->cu
;
9289 const gdb_byte
*buffer
= reader
->buffer
;
9290 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9291 unsigned int form
, i
;
9293 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9295 /* The only abbrev we care about is DW_AT_sibling. */
9296 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9298 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9299 if (attr
.form
== DW_FORM_ref_addr
)
9300 complaint (&symfile_complaints
,
9301 _("ignoring absolute DW_AT_sibling"));
9304 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9305 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9307 if (sibling_ptr
< info_ptr
)
9308 complaint (&symfile_complaints
,
9309 _("DW_AT_sibling points backwards"));
9310 else if (sibling_ptr
> reader
->buffer_end
)
9311 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9317 /* If it isn't DW_AT_sibling, skip this attribute. */
9318 form
= abbrev
->attrs
[i
].form
;
9322 case DW_FORM_ref_addr
:
9323 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9324 and later it is offset sized. */
9325 if (cu
->header
.version
== 2)
9326 info_ptr
+= cu
->header
.addr_size
;
9328 info_ptr
+= cu
->header
.offset_size
;
9330 case DW_FORM_GNU_ref_alt
:
9331 info_ptr
+= cu
->header
.offset_size
;
9334 info_ptr
+= cu
->header
.addr_size
;
9341 case DW_FORM_flag_present
:
9342 case DW_FORM_implicit_const
:
9354 case DW_FORM_ref_sig8
:
9357 case DW_FORM_data16
:
9360 case DW_FORM_string
:
9361 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9362 info_ptr
+= bytes_read
;
9364 case DW_FORM_sec_offset
:
9366 case DW_FORM_GNU_strp_alt
:
9367 info_ptr
+= cu
->header
.offset_size
;
9369 case DW_FORM_exprloc
:
9371 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9372 info_ptr
+= bytes_read
;
9374 case DW_FORM_block1
:
9375 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9377 case DW_FORM_block2
:
9378 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9380 case DW_FORM_block4
:
9381 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9385 case DW_FORM_ref_udata
:
9386 case DW_FORM_GNU_addr_index
:
9387 case DW_FORM_GNU_str_index
:
9388 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9390 case DW_FORM_indirect
:
9391 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9392 info_ptr
+= bytes_read
;
9393 /* We need to continue parsing from here, so just go back to
9395 goto skip_attribute
;
9398 error (_("Dwarf Error: Cannot handle %s "
9399 "in DWARF reader [in module %s]"),
9400 dwarf_form_name (form
),
9401 bfd_get_filename (abfd
));
9405 if (abbrev
->has_children
)
9406 return skip_children (reader
, info_ptr
);
9411 /* Locate ORIG_PDI's sibling.
9412 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9414 static const gdb_byte
*
9415 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9416 struct partial_die_info
*orig_pdi
,
9417 const gdb_byte
*info_ptr
)
9419 /* Do we know the sibling already? */
9421 if (orig_pdi
->sibling
)
9422 return orig_pdi
->sibling
;
9424 /* Are there any children to deal with? */
9426 if (!orig_pdi
->has_children
)
9429 /* Skip the children the long way. */
9431 return skip_children (reader
, info_ptr
);
9434 /* Expand this partial symbol table into a full symbol table. SELF is
9438 dwarf2_read_symtab (struct partial_symtab
*self
,
9439 struct objfile
*objfile
)
9441 struct dwarf2_per_objfile
*dwarf2_per_objfile
9442 = get_dwarf2_per_objfile (objfile
);
9446 warning (_("bug: psymtab for %s is already read in."),
9453 printf_filtered (_("Reading in symbols for %s..."),
9455 gdb_flush (gdb_stdout
);
9458 /* If this psymtab is constructed from a debug-only objfile, the
9459 has_section_at_zero flag will not necessarily be correct. We
9460 can get the correct value for this flag by looking at the data
9461 associated with the (presumably stripped) associated objfile. */
9462 if (objfile
->separate_debug_objfile_backlink
)
9464 struct dwarf2_per_objfile
*dpo_backlink
9465 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9467 dwarf2_per_objfile
->has_section_at_zero
9468 = dpo_backlink
->has_section_at_zero
;
9471 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9473 psymtab_to_symtab_1 (self
);
9475 /* Finish up the debug error message. */
9477 printf_filtered (_("done.\n"));
9480 process_cu_includes (dwarf2_per_objfile
);
9483 /* Reading in full CUs. */
9485 /* Add PER_CU to the queue. */
9488 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9489 enum language pretend_language
)
9491 struct dwarf2_queue_item
*item
;
9494 item
= XNEW (struct dwarf2_queue_item
);
9495 item
->per_cu
= per_cu
;
9496 item
->pretend_language
= pretend_language
;
9499 if (dwarf2_queue
== NULL
)
9500 dwarf2_queue
= item
;
9502 dwarf2_queue_tail
->next
= item
;
9504 dwarf2_queue_tail
= item
;
9507 /* If PER_CU is not yet queued, add it to the queue.
9508 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9510 The result is non-zero if PER_CU was queued, otherwise the result is zero
9511 meaning either PER_CU is already queued or it is already loaded.
9513 N.B. There is an invariant here that if a CU is queued then it is loaded.
9514 The caller is required to load PER_CU if we return non-zero. */
9517 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9518 struct dwarf2_per_cu_data
*per_cu
,
9519 enum language pretend_language
)
9521 /* We may arrive here during partial symbol reading, if we need full
9522 DIEs to process an unusual case (e.g. template arguments). Do
9523 not queue PER_CU, just tell our caller to load its DIEs. */
9524 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9526 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9531 /* Mark the dependence relation so that we don't flush PER_CU
9533 if (dependent_cu
!= NULL
)
9534 dwarf2_add_dependence (dependent_cu
, per_cu
);
9536 /* If it's already on the queue, we have nothing to do. */
9540 /* If the compilation unit is already loaded, just mark it as
9542 if (per_cu
->cu
!= NULL
)
9544 per_cu
->cu
->last_used
= 0;
9548 /* Add it to the queue. */
9549 queue_comp_unit (per_cu
, pretend_language
);
9554 /* Process the queue. */
9557 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9559 struct dwarf2_queue_item
*item
, *next_item
;
9561 if (dwarf_read_debug
)
9563 fprintf_unfiltered (gdb_stdlog
,
9564 "Expanding one or more symtabs of objfile %s ...\n",
9565 objfile_name (dwarf2_per_objfile
->objfile
));
9568 /* The queue starts out with one item, but following a DIE reference
9569 may load a new CU, adding it to the end of the queue. */
9570 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9572 if ((dwarf2_per_objfile
->using_index
9573 ? !item
->per_cu
->v
.quick
->compunit_symtab
9574 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9575 /* Skip dummy CUs. */
9576 && item
->per_cu
->cu
!= NULL
)
9578 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9579 unsigned int debug_print_threshold
;
9582 if (per_cu
->is_debug_types
)
9584 struct signatured_type
*sig_type
=
9585 (struct signatured_type
*) per_cu
;
9587 sprintf (buf
, "TU %s at offset %s",
9588 hex_string (sig_type
->signature
),
9589 sect_offset_str (per_cu
->sect_off
));
9590 /* There can be 100s of TUs.
9591 Only print them in verbose mode. */
9592 debug_print_threshold
= 2;
9596 sprintf (buf
, "CU at offset %s",
9597 sect_offset_str (per_cu
->sect_off
));
9598 debug_print_threshold
= 1;
9601 if (dwarf_read_debug
>= debug_print_threshold
)
9602 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9604 if (per_cu
->is_debug_types
)
9605 process_full_type_unit (per_cu
, item
->pretend_language
);
9607 process_full_comp_unit (per_cu
, item
->pretend_language
);
9609 if (dwarf_read_debug
>= debug_print_threshold
)
9610 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9613 item
->per_cu
->queued
= 0;
9614 next_item
= item
->next
;
9618 dwarf2_queue_tail
= NULL
;
9620 if (dwarf_read_debug
)
9622 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9623 objfile_name (dwarf2_per_objfile
->objfile
));
9627 /* Read in full symbols for PST, and anything it depends on. */
9630 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9632 struct dwarf2_per_cu_data
*per_cu
;
9638 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9639 if (!pst
->dependencies
[i
]->readin
9640 && pst
->dependencies
[i
]->user
== NULL
)
9642 /* Inform about additional files that need to be read in. */
9645 /* FIXME: i18n: Need to make this a single string. */
9646 fputs_filtered (" ", gdb_stdout
);
9648 fputs_filtered ("and ", gdb_stdout
);
9650 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9651 wrap_here (""); /* Flush output. */
9652 gdb_flush (gdb_stdout
);
9654 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9657 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9661 /* It's an include file, no symbols to read for it.
9662 Everything is in the parent symtab. */
9667 dw2_do_instantiate_symtab (per_cu
);
9670 /* Trivial hash function for die_info: the hash value of a DIE
9671 is its offset in .debug_info for this objfile. */
9674 die_hash (const void *item
)
9676 const struct die_info
*die
= (const struct die_info
*) item
;
9678 return to_underlying (die
->sect_off
);
9681 /* Trivial comparison function for die_info structures: two DIEs
9682 are equal if they have the same offset. */
9685 die_eq (const void *item_lhs
, const void *item_rhs
)
9687 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9688 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9690 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9693 /* die_reader_func for load_full_comp_unit.
9694 This is identical to read_signatured_type_reader,
9695 but is kept separate for now. */
9698 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9699 const gdb_byte
*info_ptr
,
9700 struct die_info
*comp_unit_die
,
9704 struct dwarf2_cu
*cu
= reader
->cu
;
9705 enum language
*language_ptr
= (enum language
*) data
;
9707 gdb_assert (cu
->die_hash
== NULL
);
9709 htab_create_alloc_ex (cu
->header
.length
/ 12,
9713 &cu
->comp_unit_obstack
,
9714 hashtab_obstack_allocate
,
9715 dummy_obstack_deallocate
);
9718 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9719 &info_ptr
, comp_unit_die
);
9720 cu
->dies
= comp_unit_die
;
9721 /* comp_unit_die is not stored in die_hash, no need. */
9723 /* We try not to read any attributes in this function, because not
9724 all CUs needed for references have been loaded yet, and symbol
9725 table processing isn't initialized. But we have to set the CU language,
9726 or we won't be able to build types correctly.
9727 Similarly, if we do not read the producer, we can not apply
9728 producer-specific interpretation. */
9729 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9732 /* Load the DIEs associated with PER_CU into memory. */
9735 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9736 enum language pretend_language
)
9738 gdb_assert (! this_cu
->is_debug_types
);
9740 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
9741 load_full_comp_unit_reader
, &pretend_language
);
9744 /* Add a DIE to the delayed physname list. */
9747 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9748 const char *name
, struct die_info
*die
,
9749 struct dwarf2_cu
*cu
)
9751 struct delayed_method_info mi
;
9753 mi
.fnfield_index
= fnfield_index
;
9757 cu
->method_list
.push_back (mi
);
9760 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9761 "const" / "volatile". If so, decrements LEN by the length of the
9762 modifier and return true. Otherwise return false. */
9766 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9768 size_t mod_len
= sizeof (mod
) - 1;
9769 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9777 /* Compute the physnames of any methods on the CU's method list.
9779 The computation of method physnames is delayed in order to avoid the
9780 (bad) condition that one of the method's formal parameters is of an as yet
9784 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9786 /* Only C++ delays computing physnames. */
9787 if (cu
->method_list
.empty ())
9789 gdb_assert (cu
->language
== language_cplus
);
9791 for (struct delayed_method_info
&mi
: cu
->method_list
)
9793 const char *physname
;
9794 struct fn_fieldlist
*fn_flp
9795 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9796 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9797 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9798 = physname
? physname
: "";
9800 /* Since there's no tag to indicate whether a method is a
9801 const/volatile overload, extract that information out of the
9803 if (physname
!= NULL
)
9805 size_t len
= strlen (physname
);
9809 if (physname
[len
] == ')') /* shortcut */
9811 else if (check_modifier (physname
, len
, " const"))
9812 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9813 else if (check_modifier (physname
, len
, " volatile"))
9814 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9821 /* The list is no longer needed. */
9822 cu
->method_list
.clear ();
9825 /* Go objects should be embedded in a DW_TAG_module DIE,
9826 and it's not clear if/how imported objects will appear.
9827 To keep Go support simple until that's worked out,
9828 go back through what we've read and create something usable.
9829 We could do this while processing each DIE, and feels kinda cleaner,
9830 but that way is more invasive.
9831 This is to, for example, allow the user to type "p var" or "b main"
9832 without having to specify the package name, and allow lookups
9833 of module.object to work in contexts that use the expression
9837 fixup_go_packaging (struct dwarf2_cu
*cu
)
9839 char *package_name
= NULL
;
9840 struct pending
*list
;
9843 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
9845 for (i
= 0; i
< list
->nsyms
; ++i
)
9847 struct symbol
*sym
= list
->symbol
[i
];
9849 if (SYMBOL_LANGUAGE (sym
) == language_go
9850 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9852 char *this_package_name
= go_symbol_package_name (sym
);
9854 if (this_package_name
== NULL
)
9856 if (package_name
== NULL
)
9857 package_name
= this_package_name
;
9860 struct objfile
*objfile
9861 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9862 if (strcmp (package_name
, this_package_name
) != 0)
9863 complaint (&symfile_complaints
,
9864 _("Symtab %s has objects from two different Go packages: %s and %s"),
9865 (symbol_symtab (sym
) != NULL
9866 ? symtab_to_filename_for_display
9867 (symbol_symtab (sym
))
9868 : objfile_name (objfile
)),
9869 this_package_name
, package_name
);
9870 xfree (this_package_name
);
9876 if (package_name
!= NULL
)
9878 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9879 const char *saved_package_name
9880 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9882 strlen (package_name
));
9883 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9884 saved_package_name
);
9887 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9889 sym
= allocate_symbol (objfile
);
9890 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9891 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9892 strlen (saved_package_name
), 0, objfile
);
9893 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9894 e.g., "main" finds the "main" module and not C's main(). */
9895 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9896 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9897 SYMBOL_TYPE (sym
) = type
;
9899 add_symbol_to_list (sym
, &global_symbols
);
9901 xfree (package_name
);
9905 /* Allocate a fully-qualified name consisting of the two parts on the
9909 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9911 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9914 /* A helper that allocates a struct discriminant_info to attach to a
9917 static struct discriminant_info
*
9918 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9921 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9922 gdb_assert (discriminant_index
== -1
9923 || (discriminant_index
>= 0
9924 && discriminant_index
< TYPE_NFIELDS (type
)));
9925 gdb_assert (default_index
== -1
9926 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9928 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9930 struct discriminant_info
*disc
9931 = ((struct discriminant_info
*)
9933 offsetof (struct discriminant_info
, discriminants
)
9934 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9935 disc
->default_index
= default_index
;
9936 disc
->discriminant_index
= discriminant_index
;
9938 struct dynamic_prop prop
;
9939 prop
.kind
= PROP_UNDEFINED
;
9940 prop
.data
.baton
= disc
;
9942 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9947 /* Some versions of rustc emitted enums in an unusual way.
9949 Ordinary enums were emitted as unions. The first element of each
9950 structure in the union was named "RUST$ENUM$DISR". This element
9951 held the discriminant.
9953 These versions of Rust also implemented the "non-zero"
9954 optimization. When the enum had two values, and one is empty and
9955 the other holds a pointer that cannot be zero, the pointer is used
9956 as the discriminant, with a zero value meaning the empty variant.
9957 Here, the union's first member is of the form
9958 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9959 where the fieldnos are the indices of the fields that should be
9960 traversed in order to find the field (which may be several fields deep)
9961 and the variantname is the name of the variant of the case when the
9964 This function recognizes whether TYPE is of one of these forms,
9965 and, if so, smashes it to be a variant type. */
9968 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9970 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9972 /* We don't need to deal with empty enums. */
9973 if (TYPE_NFIELDS (type
) == 0)
9976 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9977 if (TYPE_NFIELDS (type
) == 1
9978 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9980 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9982 /* Decode the field name to find the offset of the
9984 ULONGEST bit_offset
= 0;
9985 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9986 while (name
[0] >= '0' && name
[0] <= '9')
9989 unsigned long index
= strtoul (name
, &tail
, 10);
9992 || index
>= TYPE_NFIELDS (field_type
)
9993 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9994 != FIELD_LOC_KIND_BITPOS
))
9996 complaint (&symfile_complaints
,
9997 _("Could not parse Rust enum encoding string \"%s\""
9999 TYPE_FIELD_NAME (type
, 0),
10000 objfile_name (objfile
));
10005 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
10006 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
10009 /* Make a union to hold the variants. */
10010 struct type
*union_type
= alloc_type (objfile
);
10011 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10012 TYPE_NFIELDS (union_type
) = 3;
10013 TYPE_FIELDS (union_type
)
10014 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
10015 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10017 /* Put the discriminant must at index 0. */
10018 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
10019 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10020 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10021 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
10023 /* The order of fields doesn't really matter, so put the real
10024 field at index 1 and the data-less field at index 2. */
10025 struct discriminant_info
*disc
10026 = alloc_discriminant_info (union_type
, 0, 1);
10027 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
10028 TYPE_FIELD_NAME (union_type
, 1)
10029 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
10030 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
10031 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10032 TYPE_FIELD_NAME (union_type
, 1));
10034 const char *dataless_name
10035 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10037 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
10039 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
10040 /* NAME points into the original discriminant name, which
10041 already has the correct lifetime. */
10042 TYPE_FIELD_NAME (union_type
, 2) = name
;
10043 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
10044 disc
->discriminants
[2] = 0;
10046 /* Smash this type to be a structure type. We have to do this
10047 because the type has already been recorded. */
10048 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10049 TYPE_NFIELDS (type
) = 1;
10051 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
10053 /* Install the variant part. */
10054 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10055 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10056 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10058 else if (TYPE_NFIELDS (type
) == 1)
10060 /* We assume that a union with a single field is a univariant
10062 /* Smash this type to be a structure type. We have to do this
10063 because the type has already been recorded. */
10064 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10066 /* Make a union to hold the variants. */
10067 struct type
*union_type
= alloc_type (objfile
);
10068 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10069 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10070 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10071 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10073 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10074 const char *variant_name
10075 = rust_last_path_segment (TYPE_NAME (field_type
));
10076 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10077 TYPE_NAME (field_type
)
10078 = rust_fully_qualify (&objfile
->objfile_obstack
,
10079 TYPE_NAME (type
), variant_name
);
10081 /* Install the union in the outer struct type. */
10082 TYPE_NFIELDS (type
) = 1;
10084 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10085 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10086 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10087 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10089 alloc_discriminant_info (union_type
, -1, 0);
10093 struct type
*disr_type
= nullptr;
10094 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10096 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10098 if (TYPE_NFIELDS (disr_type
) == 0)
10100 /* Could be data-less variant, so keep going. */
10102 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10103 "RUST$ENUM$DISR") != 0)
10105 /* Not a Rust enum. */
10115 /* If we got here without a discriminant, then it's probably
10117 if (disr_type
== nullptr)
10120 /* Smash this type to be a structure type. We have to do this
10121 because the type has already been recorded. */
10122 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10124 /* Make a union to hold the variants. */
10125 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10126 struct type
*union_type
= alloc_type (objfile
);
10127 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10128 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10129 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10130 TYPE_FIELDS (union_type
)
10131 = (struct field
*) TYPE_ZALLOC (union_type
,
10132 (TYPE_NFIELDS (union_type
)
10133 * sizeof (struct field
)));
10135 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10136 TYPE_NFIELDS (type
) * sizeof (struct field
));
10138 /* Install the discriminant at index 0 in the union. */
10139 TYPE_FIELD (union_type
, 0) = *disr_field
;
10140 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10141 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10143 /* Install the union in the outer struct type. */
10144 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10145 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10146 TYPE_NFIELDS (type
) = 1;
10148 /* Set the size and offset of the union type. */
10149 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10151 /* We need a way to find the correct discriminant given a
10152 variant name. For convenience we build a map here. */
10153 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10154 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10155 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10157 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10160 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10161 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10165 int n_fields
= TYPE_NFIELDS (union_type
);
10166 struct discriminant_info
*disc
10167 = alloc_discriminant_info (union_type
, 0, -1);
10168 /* Skip the discriminant here. */
10169 for (int i
= 1; i
< n_fields
; ++i
)
10171 /* Find the final word in the name of this variant's type.
10172 That name can be used to look up the correct
10174 const char *variant_name
10175 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10178 auto iter
= discriminant_map
.find (variant_name
);
10179 if (iter
!= discriminant_map
.end ())
10180 disc
->discriminants
[i
] = iter
->second
;
10182 /* Remove the discriminant field. */
10183 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10184 --TYPE_NFIELDS (sub_type
);
10185 ++TYPE_FIELDS (sub_type
);
10186 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10187 TYPE_NAME (sub_type
)
10188 = rust_fully_qualify (&objfile
->objfile_obstack
,
10189 TYPE_NAME (type
), variant_name
);
10194 /* Rewrite some Rust unions to be structures with variants parts. */
10197 rust_union_quirks (struct dwarf2_cu
*cu
)
10199 gdb_assert (cu
->language
== language_rust
);
10200 for (struct type
*type
: cu
->rust_unions
)
10201 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10204 /* Return the symtab for PER_CU. This works properly regardless of
10205 whether we're using the index or psymtabs. */
10207 static struct compunit_symtab
*
10208 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10210 return (per_cu
->dwarf2_per_objfile
->using_index
10211 ? per_cu
->v
.quick
->compunit_symtab
10212 : per_cu
->v
.psymtab
->compunit_symtab
);
10215 /* A helper function for computing the list of all symbol tables
10216 included by PER_CU. */
10219 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10220 htab_t all_children
, htab_t all_type_symtabs
,
10221 struct dwarf2_per_cu_data
*per_cu
,
10222 struct compunit_symtab
*immediate_parent
)
10226 struct compunit_symtab
*cust
;
10227 struct dwarf2_per_cu_data
*iter
;
10229 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10232 /* This inclusion and its children have been processed. */
10237 /* Only add a CU if it has a symbol table. */
10238 cust
= get_compunit_symtab (per_cu
);
10241 /* If this is a type unit only add its symbol table if we haven't
10242 seen it yet (type unit per_cu's can share symtabs). */
10243 if (per_cu
->is_debug_types
)
10245 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10249 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10250 if (cust
->user
== NULL
)
10251 cust
->user
= immediate_parent
;
10256 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10257 if (cust
->user
== NULL
)
10258 cust
->user
= immediate_parent
;
10263 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10266 recursively_compute_inclusions (result
, all_children
,
10267 all_type_symtabs
, iter
, cust
);
10271 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10275 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10277 gdb_assert (! per_cu
->is_debug_types
);
10279 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10282 struct dwarf2_per_cu_data
*per_cu_iter
;
10283 struct compunit_symtab
*compunit_symtab_iter
;
10284 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10285 htab_t all_children
, all_type_symtabs
;
10286 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10288 /* If we don't have a symtab, we can just skip this case. */
10292 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10293 NULL
, xcalloc
, xfree
);
10294 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10295 NULL
, xcalloc
, xfree
);
10298 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10302 recursively_compute_inclusions (&result_symtabs
, all_children
,
10303 all_type_symtabs
, per_cu_iter
,
10307 /* Now we have a transitive closure of all the included symtabs. */
10308 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10310 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10311 struct compunit_symtab
*, len
+ 1);
10313 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10314 compunit_symtab_iter
);
10316 cust
->includes
[ix
] = compunit_symtab_iter
;
10317 cust
->includes
[len
] = NULL
;
10319 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10320 htab_delete (all_children
);
10321 htab_delete (all_type_symtabs
);
10325 /* Compute the 'includes' field for the symtabs of all the CUs we just
10329 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10332 struct dwarf2_per_cu_data
*iter
;
10335 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10339 if (! iter
->is_debug_types
)
10340 compute_compunit_symtab_includes (iter
);
10343 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10346 /* Generate full symbol information for PER_CU, whose DIEs have
10347 already been loaded into memory. */
10350 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10351 enum language pretend_language
)
10353 struct dwarf2_cu
*cu
= per_cu
->cu
;
10354 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10355 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10356 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10357 CORE_ADDR lowpc
, highpc
;
10358 struct compunit_symtab
*cust
;
10359 CORE_ADDR baseaddr
;
10360 struct block
*static_block
;
10363 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10366 scoped_free_pendings free_pending
;
10368 /* Clear the list here in case something was left over. */
10369 cu
->method_list
.clear ();
10371 cu
->list_in_scope
= &file_symbols
;
10373 cu
->language
= pretend_language
;
10374 cu
->language_defn
= language_def (cu
->language
);
10376 /* Do line number decoding in read_file_scope () */
10377 process_die (cu
->dies
, cu
);
10379 /* For now fudge the Go package. */
10380 if (cu
->language
== language_go
)
10381 fixup_go_packaging (cu
);
10383 /* Now that we have processed all the DIEs in the CU, all the types
10384 should be complete, and it should now be safe to compute all of the
10386 compute_delayed_physnames (cu
);
10388 if (cu
->language
== language_rust
)
10389 rust_union_quirks (cu
);
10391 /* Some compilers don't define a DW_AT_high_pc attribute for the
10392 compilation unit. If the DW_AT_high_pc is missing, synthesize
10393 it, by scanning the DIE's below the compilation unit. */
10394 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10396 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10397 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10399 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10400 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10401 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10402 addrmap to help ensure it has an accurate map of pc values belonging to
10404 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10406 cust
= end_symtab_from_static_block (static_block
,
10407 SECT_OFF_TEXT (objfile
), 0);
10411 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10413 /* Set symtab language to language from DW_AT_language. If the
10414 compilation is from a C file generated by language preprocessors, do
10415 not set the language if it was already deduced by start_subfile. */
10416 if (!(cu
->language
== language_c
10417 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10418 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10420 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10421 produce DW_AT_location with location lists but it can be possibly
10422 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10423 there were bugs in prologue debug info, fixed later in GCC-4.5
10424 by "unwind info for epilogues" patch (which is not directly related).
10426 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10427 needed, it would be wrong due to missing DW_AT_producer there.
10429 Still one can confuse GDB by using non-standard GCC compilation
10430 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10432 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10433 cust
->locations_valid
= 1;
10435 if (gcc_4_minor
>= 5)
10436 cust
->epilogue_unwind_valid
= 1;
10438 cust
->call_site_htab
= cu
->call_site_htab
;
10441 if (dwarf2_per_objfile
->using_index
)
10442 per_cu
->v
.quick
->compunit_symtab
= cust
;
10445 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10446 pst
->compunit_symtab
= cust
;
10450 /* Push it for inclusion processing later. */
10451 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10454 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10455 already been loaded into memory. */
10458 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10459 enum language pretend_language
)
10461 struct dwarf2_cu
*cu
= per_cu
->cu
;
10462 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10463 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10464 struct compunit_symtab
*cust
;
10465 struct signatured_type
*sig_type
;
10467 gdb_assert (per_cu
->is_debug_types
);
10468 sig_type
= (struct signatured_type
*) per_cu
;
10471 scoped_free_pendings free_pending
;
10473 /* Clear the list here in case something was left over. */
10474 cu
->method_list
.clear ();
10476 cu
->list_in_scope
= &file_symbols
;
10478 cu
->language
= pretend_language
;
10479 cu
->language_defn
= language_def (cu
->language
);
10481 /* The symbol tables are set up in read_type_unit_scope. */
10482 process_die (cu
->dies
, cu
);
10484 /* For now fudge the Go package. */
10485 if (cu
->language
== language_go
)
10486 fixup_go_packaging (cu
);
10488 /* Now that we have processed all the DIEs in the CU, all the types
10489 should be complete, and it should now be safe to compute all of the
10491 compute_delayed_physnames (cu
);
10493 if (cu
->language
== language_rust
)
10494 rust_union_quirks (cu
);
10496 /* TUs share symbol tables.
10497 If this is the first TU to use this symtab, complete the construction
10498 of it with end_expandable_symtab. Otherwise, complete the addition of
10499 this TU's symbols to the existing symtab. */
10500 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10502 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10503 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10507 /* Set symtab language to language from DW_AT_language. If the
10508 compilation is from a C file generated by language preprocessors,
10509 do not set the language if it was already deduced by
10511 if (!(cu
->language
== language_c
10512 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10513 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10518 augment_type_symtab ();
10519 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10522 if (dwarf2_per_objfile
->using_index
)
10523 per_cu
->v
.quick
->compunit_symtab
= cust
;
10526 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10527 pst
->compunit_symtab
= cust
;
10532 /* Process an imported unit DIE. */
10535 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10537 struct attribute
*attr
;
10539 /* For now we don't handle imported units in type units. */
10540 if (cu
->per_cu
->is_debug_types
)
10542 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10543 " supported in type units [in module %s]"),
10544 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10547 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10550 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10551 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10552 dwarf2_per_cu_data
*per_cu
10553 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10554 cu
->per_cu
->dwarf2_per_objfile
);
10556 /* If necessary, add it to the queue and load its DIEs. */
10557 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10558 load_full_comp_unit (per_cu
, cu
->language
);
10560 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10565 /* RAII object that represents a process_die scope: i.e.,
10566 starts/finishes processing a DIE. */
10567 class process_die_scope
10570 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10571 : m_die (die
), m_cu (cu
)
10573 /* We should only be processing DIEs not already in process. */
10574 gdb_assert (!m_die
->in_process
);
10575 m_die
->in_process
= true;
10578 ~process_die_scope ()
10580 m_die
->in_process
= false;
10582 /* If we're done processing the DIE for the CU that owns the line
10583 header, we don't need the line header anymore. */
10584 if (m_cu
->line_header_die_owner
== m_die
)
10586 delete m_cu
->line_header
;
10587 m_cu
->line_header
= NULL
;
10588 m_cu
->line_header_die_owner
= NULL
;
10597 /* Process a die and its children. */
10600 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10602 process_die_scope
scope (die
, cu
);
10606 case DW_TAG_padding
:
10608 case DW_TAG_compile_unit
:
10609 case DW_TAG_partial_unit
:
10610 read_file_scope (die
, cu
);
10612 case DW_TAG_type_unit
:
10613 read_type_unit_scope (die
, cu
);
10615 case DW_TAG_subprogram
:
10616 case DW_TAG_inlined_subroutine
:
10617 read_func_scope (die
, cu
);
10619 case DW_TAG_lexical_block
:
10620 case DW_TAG_try_block
:
10621 case DW_TAG_catch_block
:
10622 read_lexical_block_scope (die
, cu
);
10624 case DW_TAG_call_site
:
10625 case DW_TAG_GNU_call_site
:
10626 read_call_site_scope (die
, cu
);
10628 case DW_TAG_class_type
:
10629 case DW_TAG_interface_type
:
10630 case DW_TAG_structure_type
:
10631 case DW_TAG_union_type
:
10632 process_structure_scope (die
, cu
);
10634 case DW_TAG_enumeration_type
:
10635 process_enumeration_scope (die
, cu
);
10638 /* These dies have a type, but processing them does not create
10639 a symbol or recurse to process the children. Therefore we can
10640 read them on-demand through read_type_die. */
10641 case DW_TAG_subroutine_type
:
10642 case DW_TAG_set_type
:
10643 case DW_TAG_array_type
:
10644 case DW_TAG_pointer_type
:
10645 case DW_TAG_ptr_to_member_type
:
10646 case DW_TAG_reference_type
:
10647 case DW_TAG_rvalue_reference_type
:
10648 case DW_TAG_string_type
:
10651 case DW_TAG_base_type
:
10652 case DW_TAG_subrange_type
:
10653 case DW_TAG_typedef
:
10654 /* Add a typedef symbol for the type definition, if it has a
10656 new_symbol (die
, read_type_die (die
, cu
), cu
);
10658 case DW_TAG_common_block
:
10659 read_common_block (die
, cu
);
10661 case DW_TAG_common_inclusion
:
10663 case DW_TAG_namespace
:
10664 cu
->processing_has_namespace_info
= 1;
10665 read_namespace (die
, cu
);
10667 case DW_TAG_module
:
10668 cu
->processing_has_namespace_info
= 1;
10669 read_module (die
, cu
);
10671 case DW_TAG_imported_declaration
:
10672 cu
->processing_has_namespace_info
= 1;
10673 if (read_namespace_alias (die
, cu
))
10675 /* The declaration is not a global namespace alias: fall through. */
10676 case DW_TAG_imported_module
:
10677 cu
->processing_has_namespace_info
= 1;
10678 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10679 || cu
->language
!= language_fortran
))
10680 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10681 dwarf_tag_name (die
->tag
));
10682 read_import_statement (die
, cu
);
10685 case DW_TAG_imported_unit
:
10686 process_imported_unit_die (die
, cu
);
10689 case DW_TAG_variable
:
10690 read_variable (die
, cu
);
10694 new_symbol (die
, NULL
, cu
);
10699 /* DWARF name computation. */
10701 /* A helper function for dwarf2_compute_name which determines whether DIE
10702 needs to have the name of the scope prepended to the name listed in the
10706 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10708 struct attribute
*attr
;
10712 case DW_TAG_namespace
:
10713 case DW_TAG_typedef
:
10714 case DW_TAG_class_type
:
10715 case DW_TAG_interface_type
:
10716 case DW_TAG_structure_type
:
10717 case DW_TAG_union_type
:
10718 case DW_TAG_enumeration_type
:
10719 case DW_TAG_enumerator
:
10720 case DW_TAG_subprogram
:
10721 case DW_TAG_inlined_subroutine
:
10722 case DW_TAG_member
:
10723 case DW_TAG_imported_declaration
:
10726 case DW_TAG_variable
:
10727 case DW_TAG_constant
:
10728 /* We only need to prefix "globally" visible variables. These include
10729 any variable marked with DW_AT_external or any variable that
10730 lives in a namespace. [Variables in anonymous namespaces
10731 require prefixing, but they are not DW_AT_external.] */
10733 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10735 struct dwarf2_cu
*spec_cu
= cu
;
10737 return die_needs_namespace (die_specification (die
, &spec_cu
),
10741 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10742 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10743 && die
->parent
->tag
!= DW_TAG_module
)
10745 /* A variable in a lexical block of some kind does not need a
10746 namespace, even though in C++ such variables may be external
10747 and have a mangled name. */
10748 if (die
->parent
->tag
== DW_TAG_lexical_block
10749 || die
->parent
->tag
== DW_TAG_try_block
10750 || die
->parent
->tag
== DW_TAG_catch_block
10751 || die
->parent
->tag
== DW_TAG_subprogram
)
10760 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10761 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10762 defined for the given DIE. */
10764 static struct attribute
*
10765 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10767 struct attribute
*attr
;
10769 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10771 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10776 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10777 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10778 defined for the given DIE. */
10780 static const char *
10781 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10783 const char *linkage_name
;
10785 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10786 if (linkage_name
== NULL
)
10787 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10789 return linkage_name
;
10792 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10793 compute the physname for the object, which include a method's:
10794 - formal parameters (C++),
10795 - receiver type (Go),
10797 The term "physname" is a bit confusing.
10798 For C++, for example, it is the demangled name.
10799 For Go, for example, it's the mangled name.
10801 For Ada, return the DIE's linkage name rather than the fully qualified
10802 name. PHYSNAME is ignored..
10804 The result is allocated on the objfile_obstack and canonicalized. */
10806 static const char *
10807 dwarf2_compute_name (const char *name
,
10808 struct die_info
*die
, struct dwarf2_cu
*cu
,
10811 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10814 name
= dwarf2_name (die
, cu
);
10816 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10817 but otherwise compute it by typename_concat inside GDB.
10818 FIXME: Actually this is not really true, or at least not always true.
10819 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10820 Fortran names because there is no mangling standard. So new_symbol
10821 will set the demangled name to the result of dwarf2_full_name, and it is
10822 the demangled name that GDB uses if it exists. */
10823 if (cu
->language
== language_ada
10824 || (cu
->language
== language_fortran
&& physname
))
10826 /* For Ada unit, we prefer the linkage name over the name, as
10827 the former contains the exported name, which the user expects
10828 to be able to reference. Ideally, we want the user to be able
10829 to reference this entity using either natural or linkage name,
10830 but we haven't started looking at this enhancement yet. */
10831 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10833 if (linkage_name
!= NULL
)
10834 return linkage_name
;
10837 /* These are the only languages we know how to qualify names in. */
10839 && (cu
->language
== language_cplus
10840 || cu
->language
== language_fortran
|| cu
->language
== language_d
10841 || cu
->language
== language_rust
))
10843 if (die_needs_namespace (die
, cu
))
10845 const char *prefix
;
10846 const char *canonical_name
= NULL
;
10850 prefix
= determine_prefix (die
, cu
);
10851 if (*prefix
!= '\0')
10853 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10856 buf
.puts (prefixed_name
);
10857 xfree (prefixed_name
);
10862 /* Template parameters may be specified in the DIE's DW_AT_name, or
10863 as children with DW_TAG_template_type_param or
10864 DW_TAG_value_type_param. If the latter, add them to the name
10865 here. If the name already has template parameters, then
10866 skip this step; some versions of GCC emit both, and
10867 it is more efficient to use the pre-computed name.
10869 Something to keep in mind about this process: it is very
10870 unlikely, or in some cases downright impossible, to produce
10871 something that will match the mangled name of a function.
10872 If the definition of the function has the same debug info,
10873 we should be able to match up with it anyway. But fallbacks
10874 using the minimal symbol, for instance to find a method
10875 implemented in a stripped copy of libstdc++, will not work.
10876 If we do not have debug info for the definition, we will have to
10877 match them up some other way.
10879 When we do name matching there is a related problem with function
10880 templates; two instantiated function templates are allowed to
10881 differ only by their return types, which we do not add here. */
10883 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10885 struct attribute
*attr
;
10886 struct die_info
*child
;
10889 die
->building_fullname
= 1;
10891 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10895 const gdb_byte
*bytes
;
10896 struct dwarf2_locexpr_baton
*baton
;
10899 if (child
->tag
!= DW_TAG_template_type_param
10900 && child
->tag
!= DW_TAG_template_value_param
)
10911 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10914 complaint (&symfile_complaints
,
10915 _("template parameter missing DW_AT_type"));
10916 buf
.puts ("UNKNOWN_TYPE");
10919 type
= die_type (child
, cu
);
10921 if (child
->tag
== DW_TAG_template_type_param
)
10923 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10927 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10930 complaint (&symfile_complaints
,
10931 _("template parameter missing "
10932 "DW_AT_const_value"));
10933 buf
.puts ("UNKNOWN_VALUE");
10937 dwarf2_const_value_attr (attr
, type
, name
,
10938 &cu
->comp_unit_obstack
, cu
,
10939 &value
, &bytes
, &baton
);
10941 if (TYPE_NOSIGN (type
))
10942 /* GDB prints characters as NUMBER 'CHAR'. If that's
10943 changed, this can use value_print instead. */
10944 c_printchar (value
, type
, &buf
);
10947 struct value_print_options opts
;
10950 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10954 else if (bytes
!= NULL
)
10956 v
= allocate_value (type
);
10957 memcpy (value_contents_writeable (v
), bytes
,
10958 TYPE_LENGTH (type
));
10961 v
= value_from_longest (type
, value
);
10963 /* Specify decimal so that we do not depend on
10965 get_formatted_print_options (&opts
, 'd');
10967 value_print (v
, &buf
, &opts
);
10973 die
->building_fullname
= 0;
10977 /* Close the argument list, with a space if necessary
10978 (nested templates). */
10979 if (!buf
.empty () && buf
.string ().back () == '>')
10986 /* For C++ methods, append formal parameter type
10987 information, if PHYSNAME. */
10989 if (physname
&& die
->tag
== DW_TAG_subprogram
10990 && cu
->language
== language_cplus
)
10992 struct type
*type
= read_type_die (die
, cu
);
10994 c_type_print_args (type
, &buf
, 1, cu
->language
,
10995 &type_print_raw_options
);
10997 if (cu
->language
== language_cplus
)
10999 /* Assume that an artificial first parameter is
11000 "this", but do not crash if it is not. RealView
11001 marks unnamed (and thus unused) parameters as
11002 artificial; there is no way to differentiate
11004 if (TYPE_NFIELDS (type
) > 0
11005 && TYPE_FIELD_ARTIFICIAL (type
, 0)
11006 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
11007 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
11009 buf
.puts (" const");
11013 const std::string
&intermediate_name
= buf
.string ();
11015 if (cu
->language
== language_cplus
)
11017 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
11018 &objfile
->per_bfd
->storage_obstack
);
11020 /* If we only computed INTERMEDIATE_NAME, or if
11021 INTERMEDIATE_NAME is already canonical, then we need to
11022 copy it to the appropriate obstack. */
11023 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11024 name
= ((const char *)
11025 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11026 intermediate_name
.c_str (),
11027 intermediate_name
.length ()));
11029 name
= canonical_name
;
11036 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11037 If scope qualifiers are appropriate they will be added. The result
11038 will be allocated on the storage_obstack, or NULL if the DIE does
11039 not have a name. NAME may either be from a previous call to
11040 dwarf2_name or NULL.
11042 The output string will be canonicalized (if C++). */
11044 static const char *
11045 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11047 return dwarf2_compute_name (name
, die
, cu
, 0);
11050 /* Construct a physname for the given DIE in CU. NAME may either be
11051 from a previous call to dwarf2_name or NULL. The result will be
11052 allocated on the objfile_objstack or NULL if the DIE does not have a
11055 The output string will be canonicalized (if C++). */
11057 static const char *
11058 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11060 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11061 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11064 /* In this case dwarf2_compute_name is just a shortcut not building anything
11066 if (!die_needs_namespace (die
, cu
))
11067 return dwarf2_compute_name (name
, die
, cu
, 1);
11069 mangled
= dw2_linkage_name (die
, cu
);
11071 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11072 See https://github.com/rust-lang/rust/issues/32925. */
11073 if (cu
->language
== language_rust
&& mangled
!= NULL
11074 && strchr (mangled
, '{') != NULL
)
11077 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11079 gdb::unique_xmalloc_ptr
<char> demangled
;
11080 if (mangled
!= NULL
)
11083 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11085 /* Do nothing (do not demangle the symbol name). */
11087 else if (cu
->language
== language_go
)
11089 /* This is a lie, but we already lie to the caller new_symbol.
11090 new_symbol assumes we return the mangled name.
11091 This just undoes that lie until things are cleaned up. */
11095 /* Use DMGL_RET_DROP for C++ template functions to suppress
11096 their return type. It is easier for GDB users to search
11097 for such functions as `name(params)' than `long name(params)'.
11098 In such case the minimal symbol names do not match the full
11099 symbol names but for template functions there is never a need
11100 to look up their definition from their declaration so
11101 the only disadvantage remains the minimal symbol variant
11102 `long name(params)' does not have the proper inferior type. */
11103 demangled
.reset (gdb_demangle (mangled
,
11104 (DMGL_PARAMS
| DMGL_ANSI
11105 | DMGL_RET_DROP
)));
11108 canon
= demangled
.get ();
11116 if (canon
== NULL
|| check_physname
)
11118 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11120 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11122 /* It may not mean a bug in GDB. The compiler could also
11123 compute DW_AT_linkage_name incorrectly. But in such case
11124 GDB would need to be bug-to-bug compatible. */
11126 complaint (&symfile_complaints
,
11127 _("Computed physname <%s> does not match demangled <%s> "
11128 "(from linkage <%s>) - DIE at %s [in module %s]"),
11129 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11130 objfile_name (objfile
));
11132 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11133 is available here - over computed PHYSNAME. It is safer
11134 against both buggy GDB and buggy compilers. */
11148 retval
= ((const char *)
11149 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11150 retval
, strlen (retval
)));
11155 /* Inspect DIE in CU for a namespace alias. If one exists, record
11156 a new symbol for it.
11158 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11161 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11163 struct attribute
*attr
;
11165 /* If the die does not have a name, this is not a namespace
11167 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11171 struct die_info
*d
= die
;
11172 struct dwarf2_cu
*imported_cu
= cu
;
11174 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11175 keep inspecting DIEs until we hit the underlying import. */
11176 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11177 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11179 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11183 d
= follow_die_ref (d
, attr
, &imported_cu
);
11184 if (d
->tag
!= DW_TAG_imported_declaration
)
11188 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11190 complaint (&symfile_complaints
,
11191 _("DIE at %s has too many recursively imported "
11192 "declarations"), sect_offset_str (d
->sect_off
));
11199 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11201 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11202 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11204 /* This declaration is a global namespace alias. Add
11205 a symbol for it whose type is the aliased namespace. */
11206 new_symbol (die
, type
, cu
);
11215 /* Return the using directives repository (global or local?) to use in the
11216 current context for LANGUAGE.
11218 For Ada, imported declarations can materialize renamings, which *may* be
11219 global. However it is impossible (for now?) in DWARF to distinguish
11220 "external" imported declarations and "static" ones. As all imported
11221 declarations seem to be static in all other languages, make them all CU-wide
11222 global only in Ada. */
11224 static struct using_direct
**
11225 using_directives (enum language language
)
11227 if (language
== language_ada
&& context_stack_depth
== 0)
11228 return &global_using_directives
;
11230 return &local_using_directives
;
11233 /* Read the import statement specified by the given die and record it. */
11236 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11238 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11239 struct attribute
*import_attr
;
11240 struct die_info
*imported_die
, *child_die
;
11241 struct dwarf2_cu
*imported_cu
;
11242 const char *imported_name
;
11243 const char *imported_name_prefix
;
11244 const char *canonical_name
;
11245 const char *import_alias
;
11246 const char *imported_declaration
= NULL
;
11247 const char *import_prefix
;
11248 std::vector
<const char *> excludes
;
11250 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11251 if (import_attr
== NULL
)
11253 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11254 dwarf_tag_name (die
->tag
));
11259 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11260 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11261 if (imported_name
== NULL
)
11263 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11265 The import in the following code:
11279 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11280 <52> DW_AT_decl_file : 1
11281 <53> DW_AT_decl_line : 6
11282 <54> DW_AT_import : <0x75>
11283 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11284 <59> DW_AT_name : B
11285 <5b> DW_AT_decl_file : 1
11286 <5c> DW_AT_decl_line : 2
11287 <5d> DW_AT_type : <0x6e>
11289 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11290 <76> DW_AT_byte_size : 4
11291 <77> DW_AT_encoding : 5 (signed)
11293 imports the wrong die ( 0x75 instead of 0x58 ).
11294 This case will be ignored until the gcc bug is fixed. */
11298 /* Figure out the local name after import. */
11299 import_alias
= dwarf2_name (die
, cu
);
11301 /* Figure out where the statement is being imported to. */
11302 import_prefix
= determine_prefix (die
, cu
);
11304 /* Figure out what the scope of the imported die is and prepend it
11305 to the name of the imported die. */
11306 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11308 if (imported_die
->tag
!= DW_TAG_namespace
11309 && imported_die
->tag
!= DW_TAG_module
)
11311 imported_declaration
= imported_name
;
11312 canonical_name
= imported_name_prefix
;
11314 else if (strlen (imported_name_prefix
) > 0)
11315 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11316 imported_name_prefix
,
11317 (cu
->language
== language_d
? "." : "::"),
11318 imported_name
, (char *) NULL
);
11320 canonical_name
= imported_name
;
11322 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11323 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11324 child_die
= sibling_die (child_die
))
11326 /* DWARF-4: A Fortran use statement with a “rename list” may be
11327 represented by an imported module entry with an import attribute
11328 referring to the module and owned entries corresponding to those
11329 entities that are renamed as part of being imported. */
11331 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11333 complaint (&symfile_complaints
,
11334 _("child DW_TAG_imported_declaration expected "
11335 "- DIE at %s [in module %s]"),
11336 sect_offset_str (child_die
->sect_off
),
11337 objfile_name (objfile
));
11341 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11342 if (import_attr
== NULL
)
11344 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11345 dwarf_tag_name (child_die
->tag
));
11350 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11352 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11353 if (imported_name
== NULL
)
11355 complaint (&symfile_complaints
,
11356 _("child DW_TAG_imported_declaration has unknown "
11357 "imported name - DIE at %s [in module %s]"),
11358 sect_offset_str (child_die
->sect_off
),
11359 objfile_name (objfile
));
11363 excludes
.push_back (imported_name
);
11365 process_die (child_die
, cu
);
11368 add_using_directive (using_directives (cu
->language
),
11372 imported_declaration
,
11375 &objfile
->objfile_obstack
);
11378 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11379 types, but gives them a size of zero. Starting with version 14,
11380 ICC is compatible with GCC. */
11383 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11385 if (!cu
->checked_producer
)
11386 check_producer (cu
);
11388 return cu
->producer_is_icc_lt_14
;
11391 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11392 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11393 this, it was first present in GCC release 4.3.0. */
11396 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11398 if (!cu
->checked_producer
)
11399 check_producer (cu
);
11401 return cu
->producer_is_gcc_lt_4_3
;
11404 static file_and_directory
11405 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11407 file_and_directory res
;
11409 /* Find the filename. Do not use dwarf2_name here, since the filename
11410 is not a source language identifier. */
11411 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11412 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11414 if (res
.comp_dir
== NULL
11415 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11416 && IS_ABSOLUTE_PATH (res
.name
))
11418 res
.comp_dir_storage
= ldirname (res
.name
);
11419 if (!res
.comp_dir_storage
.empty ())
11420 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11422 if (res
.comp_dir
!= NULL
)
11424 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11425 directory, get rid of it. */
11426 const char *cp
= strchr (res
.comp_dir
, ':');
11428 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11429 res
.comp_dir
= cp
+ 1;
11432 if (res
.name
== NULL
)
11433 res
.name
= "<unknown>";
11438 /* Handle DW_AT_stmt_list for a compilation unit.
11439 DIE is the DW_TAG_compile_unit die for CU.
11440 COMP_DIR is the compilation directory. LOWPC is passed to
11441 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11444 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11445 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11447 struct dwarf2_per_objfile
*dwarf2_per_objfile
11448 = cu
->per_cu
->dwarf2_per_objfile
;
11449 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11450 struct attribute
*attr
;
11451 struct line_header line_header_local
;
11452 hashval_t line_header_local_hash
;
11454 int decode_mapping
;
11456 gdb_assert (! cu
->per_cu
->is_debug_types
);
11458 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11462 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11464 /* The line header hash table is only created if needed (it exists to
11465 prevent redundant reading of the line table for partial_units).
11466 If we're given a partial_unit, we'll need it. If we're given a
11467 compile_unit, then use the line header hash table if it's already
11468 created, but don't create one just yet. */
11470 if (dwarf2_per_objfile
->line_header_hash
== NULL
11471 && die
->tag
== DW_TAG_partial_unit
)
11473 dwarf2_per_objfile
->line_header_hash
11474 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11475 line_header_eq_voidp
,
11476 free_line_header_voidp
,
11477 &objfile
->objfile_obstack
,
11478 hashtab_obstack_allocate
,
11479 dummy_obstack_deallocate
);
11482 line_header_local
.sect_off
= line_offset
;
11483 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11484 line_header_local_hash
= line_header_hash (&line_header_local
);
11485 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11487 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11488 &line_header_local
,
11489 line_header_local_hash
, NO_INSERT
);
11491 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11492 is not present in *SLOT (since if there is something in *SLOT then
11493 it will be for a partial_unit). */
11494 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11496 gdb_assert (*slot
!= NULL
);
11497 cu
->line_header
= (struct line_header
*) *slot
;
11502 /* dwarf_decode_line_header does not yet provide sufficient information.
11503 We always have to call also dwarf_decode_lines for it. */
11504 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11508 cu
->line_header
= lh
.release ();
11509 cu
->line_header_die_owner
= die
;
11511 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11515 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11516 &line_header_local
,
11517 line_header_local_hash
, INSERT
);
11518 gdb_assert (slot
!= NULL
);
11520 if (slot
!= NULL
&& *slot
== NULL
)
11522 /* This newly decoded line number information unit will be owned
11523 by line_header_hash hash table. */
11524 *slot
= cu
->line_header
;
11525 cu
->line_header_die_owner
= NULL
;
11529 /* We cannot free any current entry in (*slot) as that struct line_header
11530 may be already used by multiple CUs. Create only temporary decoded
11531 line_header for this CU - it may happen at most once for each line
11532 number information unit. And if we're not using line_header_hash
11533 then this is what we want as well. */
11534 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11536 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11537 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11542 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11545 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11547 struct dwarf2_per_objfile
*dwarf2_per_objfile
11548 = cu
->per_cu
->dwarf2_per_objfile
;
11549 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11550 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11551 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11552 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11553 struct attribute
*attr
;
11554 struct die_info
*child_die
;
11555 CORE_ADDR baseaddr
;
11557 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11559 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11561 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11562 from finish_block. */
11563 if (lowpc
== ((CORE_ADDR
) -1))
11565 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11567 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11569 prepare_one_comp_unit (cu
, die
, cu
->language
);
11571 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11572 standardised yet. As a workaround for the language detection we fall
11573 back to the DW_AT_producer string. */
11574 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11575 cu
->language
= language_opencl
;
11577 /* Similar hack for Go. */
11578 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11579 set_cu_language (DW_LANG_Go
, cu
);
11581 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11583 /* Decode line number information if present. We do this before
11584 processing child DIEs, so that the line header table is available
11585 for DW_AT_decl_file. */
11586 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11588 /* Process all dies in compilation unit. */
11589 if (die
->child
!= NULL
)
11591 child_die
= die
->child
;
11592 while (child_die
&& child_die
->tag
)
11594 process_die (child_die
, cu
);
11595 child_die
= sibling_die (child_die
);
11599 /* Decode macro information, if present. Dwarf 2 macro information
11600 refers to information in the line number info statement program
11601 header, so we can only read it if we've read the header
11603 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11605 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11606 if (attr
&& cu
->line_header
)
11608 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11609 complaint (&symfile_complaints
,
11610 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11612 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11616 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11617 if (attr
&& cu
->line_header
)
11619 unsigned int macro_offset
= DW_UNSND (attr
);
11621 dwarf_decode_macros (cu
, macro_offset
, 0);
11626 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11627 Create the set of symtabs used by this TU, or if this TU is sharing
11628 symtabs with another TU and the symtabs have already been created
11629 then restore those symtabs in the line header.
11630 We don't need the pc/line-number mapping for type units. */
11633 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11635 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11636 struct type_unit_group
*tu_group
;
11638 struct attribute
*attr
;
11640 struct signatured_type
*sig_type
;
11642 gdb_assert (per_cu
->is_debug_types
);
11643 sig_type
= (struct signatured_type
*) per_cu
;
11645 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11647 /* If we're using .gdb_index (includes -readnow) then
11648 per_cu->type_unit_group may not have been set up yet. */
11649 if (sig_type
->type_unit_group
== NULL
)
11650 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11651 tu_group
= sig_type
->type_unit_group
;
11653 /* If we've already processed this stmt_list there's no real need to
11654 do it again, we could fake it and just recreate the part we need
11655 (file name,index -> symtab mapping). If data shows this optimization
11656 is useful we can do it then. */
11657 first_time
= tu_group
->compunit_symtab
== NULL
;
11659 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11664 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11665 lh
= dwarf_decode_line_header (line_offset
, cu
);
11670 dwarf2_start_symtab (cu
, "", NULL
, 0);
11673 gdb_assert (tu_group
->symtabs
== NULL
);
11674 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11679 cu
->line_header
= lh
.release ();
11680 cu
->line_header_die_owner
= die
;
11684 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11686 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11687 still initializing it, and our caller (a few levels up)
11688 process_full_type_unit still needs to know if this is the first
11691 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11692 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11693 cu
->line_header
->file_names
.size ());
11695 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11697 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11699 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11701 if (current_subfile
->symtab
== NULL
)
11703 /* NOTE: start_subfile will recognize when it's been
11704 passed a file it has already seen. So we can't
11705 assume there's a simple mapping from
11706 cu->line_header->file_names to subfiles, plus
11707 cu->line_header->file_names may contain dups. */
11708 current_subfile
->symtab
11709 = allocate_symtab (cust
, current_subfile
->name
);
11712 fe
.symtab
= current_subfile
->symtab
;
11713 tu_group
->symtabs
[i
] = fe
.symtab
;
11718 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11720 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11722 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11724 fe
.symtab
= tu_group
->symtabs
[i
];
11728 /* The main symtab is allocated last. Type units don't have DW_AT_name
11729 so they don't have a "real" (so to speak) symtab anyway.
11730 There is later code that will assign the main symtab to all symbols
11731 that don't have one. We need to handle the case of a symbol with a
11732 missing symtab (DW_AT_decl_file) anyway. */
11735 /* Process DW_TAG_type_unit.
11736 For TUs we want to skip the first top level sibling if it's not the
11737 actual type being defined by this TU. In this case the first top
11738 level sibling is there to provide context only. */
11741 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11743 struct die_info
*child_die
;
11745 prepare_one_comp_unit (cu
, die
, language_minimal
);
11747 /* Initialize (or reinitialize) the machinery for building symtabs.
11748 We do this before processing child DIEs, so that the line header table
11749 is available for DW_AT_decl_file. */
11750 setup_type_unit_groups (die
, cu
);
11752 if (die
->child
!= NULL
)
11754 child_die
= die
->child
;
11755 while (child_die
&& child_die
->tag
)
11757 process_die (child_die
, cu
);
11758 child_die
= sibling_die (child_die
);
11765 http://gcc.gnu.org/wiki/DebugFission
11766 http://gcc.gnu.org/wiki/DebugFissionDWP
11768 To simplify handling of both DWO files ("object" files with the DWARF info)
11769 and DWP files (a file with the DWOs packaged up into one file), we treat
11770 DWP files as having a collection of virtual DWO files. */
11773 hash_dwo_file (const void *item
)
11775 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11778 hash
= htab_hash_string (dwo_file
->dwo_name
);
11779 if (dwo_file
->comp_dir
!= NULL
)
11780 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11785 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11787 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11788 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11790 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11792 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11793 return lhs
->comp_dir
== rhs
->comp_dir
;
11794 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11797 /* Allocate a hash table for DWO files. */
11800 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11802 return htab_create_alloc_ex (41,
11806 &objfile
->objfile_obstack
,
11807 hashtab_obstack_allocate
,
11808 dummy_obstack_deallocate
);
11811 /* Lookup DWO file DWO_NAME. */
11814 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11815 const char *dwo_name
,
11816 const char *comp_dir
)
11818 struct dwo_file find_entry
;
11821 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11822 dwarf2_per_objfile
->dwo_files
11823 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11825 memset (&find_entry
, 0, sizeof (find_entry
));
11826 find_entry
.dwo_name
= dwo_name
;
11827 find_entry
.comp_dir
= comp_dir
;
11828 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11834 hash_dwo_unit (const void *item
)
11836 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11838 /* This drops the top 32 bits of the id, but is ok for a hash. */
11839 return dwo_unit
->signature
;
11843 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11845 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11846 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11848 /* The signature is assumed to be unique within the DWO file.
11849 So while object file CU dwo_id's always have the value zero,
11850 that's OK, assuming each object file DWO file has only one CU,
11851 and that's the rule for now. */
11852 return lhs
->signature
== rhs
->signature
;
11855 /* Allocate a hash table for DWO CUs,TUs.
11856 There is one of these tables for each of CUs,TUs for each DWO file. */
11859 allocate_dwo_unit_table (struct objfile
*objfile
)
11861 /* Start out with a pretty small number.
11862 Generally DWO files contain only one CU and maybe some TUs. */
11863 return htab_create_alloc_ex (3,
11867 &objfile
->objfile_obstack
,
11868 hashtab_obstack_allocate
,
11869 dummy_obstack_deallocate
);
11872 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11874 struct create_dwo_cu_data
11876 struct dwo_file
*dwo_file
;
11877 struct dwo_unit dwo_unit
;
11880 /* die_reader_func for create_dwo_cu. */
11883 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11884 const gdb_byte
*info_ptr
,
11885 struct die_info
*comp_unit_die
,
11889 struct dwarf2_cu
*cu
= reader
->cu
;
11890 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11891 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11892 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11893 struct dwo_file
*dwo_file
= data
->dwo_file
;
11894 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11895 struct attribute
*attr
;
11897 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11900 complaint (&symfile_complaints
,
11901 _("Dwarf Error: debug entry at offset %s is missing"
11902 " its dwo_id [in module %s]"),
11903 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11907 dwo_unit
->dwo_file
= dwo_file
;
11908 dwo_unit
->signature
= DW_UNSND (attr
);
11909 dwo_unit
->section
= section
;
11910 dwo_unit
->sect_off
= sect_off
;
11911 dwo_unit
->length
= cu
->per_cu
->length
;
11913 if (dwarf_read_debug
)
11914 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11915 sect_offset_str (sect_off
),
11916 hex_string (dwo_unit
->signature
));
11919 /* Create the dwo_units for the CUs in a DWO_FILE.
11920 Note: This function processes DWO files only, not DWP files. */
11923 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11924 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11927 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11928 const gdb_byte
*info_ptr
, *end_ptr
;
11930 dwarf2_read_section (objfile
, §ion
);
11931 info_ptr
= section
.buffer
;
11933 if (info_ptr
== NULL
)
11936 if (dwarf_read_debug
)
11938 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11939 get_section_name (§ion
),
11940 get_section_file_name (§ion
));
11943 end_ptr
= info_ptr
+ section
.size
;
11944 while (info_ptr
< end_ptr
)
11946 struct dwarf2_per_cu_data per_cu
;
11947 struct create_dwo_cu_data create_dwo_cu_data
;
11948 struct dwo_unit
*dwo_unit
;
11950 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11952 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11953 sizeof (create_dwo_cu_data
.dwo_unit
));
11954 memset (&per_cu
, 0, sizeof (per_cu
));
11955 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11956 per_cu
.is_debug_types
= 0;
11957 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11958 per_cu
.section
= §ion
;
11959 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11961 init_cutu_and_read_dies_no_follow (
11962 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11963 info_ptr
+= per_cu
.length
;
11965 // If the unit could not be parsed, skip it.
11966 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11969 if (cus_htab
== NULL
)
11970 cus_htab
= allocate_dwo_unit_table (objfile
);
11972 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11973 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11974 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11975 gdb_assert (slot
!= NULL
);
11978 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11979 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11981 complaint (&symfile_complaints
,
11982 _("debug cu entry at offset %s is duplicate to"
11983 " the entry at offset %s, signature %s"),
11984 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11985 hex_string (dwo_unit
->signature
));
11987 *slot
= (void *)dwo_unit
;
11991 /* DWP file .debug_{cu,tu}_index section format:
11992 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11996 Both index sections have the same format, and serve to map a 64-bit
11997 signature to a set of section numbers. Each section begins with a header,
11998 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11999 indexes, and a pool of 32-bit section numbers. The index sections will be
12000 aligned at 8-byte boundaries in the file.
12002 The index section header consists of:
12004 V, 32 bit version number
12006 N, 32 bit number of compilation units or type units in the index
12007 M, 32 bit number of slots in the hash table
12009 Numbers are recorded using the byte order of the application binary.
12011 The hash table begins at offset 16 in the section, and consists of an array
12012 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12013 order of the application binary). Unused slots in the hash table are 0.
12014 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12016 The parallel table begins immediately after the hash table
12017 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12018 array of 32-bit indexes (using the byte order of the application binary),
12019 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12020 table contains a 32-bit index into the pool of section numbers. For unused
12021 hash table slots, the corresponding entry in the parallel table will be 0.
12023 The pool of section numbers begins immediately following the hash table
12024 (at offset 16 + 12 * M from the beginning of the section). The pool of
12025 section numbers consists of an array of 32-bit words (using the byte order
12026 of the application binary). Each item in the array is indexed starting
12027 from 0. The hash table entry provides the index of the first section
12028 number in the set. Additional section numbers in the set follow, and the
12029 set is terminated by a 0 entry (section number 0 is not used in ELF).
12031 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12032 section must be the first entry in the set, and the .debug_abbrev.dwo must
12033 be the second entry. Other members of the set may follow in any order.
12039 DWP Version 2 combines all the .debug_info, etc. sections into one,
12040 and the entries in the index tables are now offsets into these sections.
12041 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12044 Index Section Contents:
12046 Hash Table of Signatures dwp_hash_table.hash_table
12047 Parallel Table of Indices dwp_hash_table.unit_table
12048 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12049 Table of Section Sizes dwp_hash_table.v2.sizes
12051 The index section header consists of:
12053 V, 32 bit version number
12054 L, 32 bit number of columns in the table of section offsets
12055 N, 32 bit number of compilation units or type units in the index
12056 M, 32 bit number of slots in the hash table
12058 Numbers are recorded using the byte order of the application binary.
12060 The hash table has the same format as version 1.
12061 The parallel table of indices has the same format as version 1,
12062 except that the entries are origin-1 indices into the table of sections
12063 offsets and the table of section sizes.
12065 The table of offsets begins immediately following the parallel table
12066 (at offset 16 + 12 * M from the beginning of the section). The table is
12067 a two-dimensional array of 32-bit words (using the byte order of the
12068 application binary), with L columns and N+1 rows, in row-major order.
12069 Each row in the array is indexed starting from 0. The first row provides
12070 a key to the remaining rows: each column in this row provides an identifier
12071 for a debug section, and the offsets in the same column of subsequent rows
12072 refer to that section. The section identifiers are:
12074 DW_SECT_INFO 1 .debug_info.dwo
12075 DW_SECT_TYPES 2 .debug_types.dwo
12076 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12077 DW_SECT_LINE 4 .debug_line.dwo
12078 DW_SECT_LOC 5 .debug_loc.dwo
12079 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12080 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12081 DW_SECT_MACRO 8 .debug_macro.dwo
12083 The offsets provided by the CU and TU index sections are the base offsets
12084 for the contributions made by each CU or TU to the corresponding section
12085 in the package file. Each CU and TU header contains an abbrev_offset
12086 field, used to find the abbreviations table for that CU or TU within the
12087 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12088 be interpreted as relative to the base offset given in the index section.
12089 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12090 should be interpreted as relative to the base offset for .debug_line.dwo,
12091 and offsets into other debug sections obtained from DWARF attributes should
12092 also be interpreted as relative to the corresponding base offset.
12094 The table of sizes begins immediately following the table of offsets.
12095 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12096 with L columns and N rows, in row-major order. Each row in the array is
12097 indexed starting from 1 (row 0 is shared by the two tables).
12101 Hash table lookup is handled the same in version 1 and 2:
12103 We assume that N and M will not exceed 2^32 - 1.
12104 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12106 Given a 64-bit compilation unit signature or a type signature S, an entry
12107 in the hash table is located as follows:
12109 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12110 the low-order k bits all set to 1.
12112 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12114 3) If the hash table entry at index H matches the signature, use that
12115 entry. If the hash table entry at index H is unused (all zeroes),
12116 terminate the search: the signature is not present in the table.
12118 4) Let H = (H + H') modulo M. Repeat at Step 3.
12120 Because M > N and H' and M are relatively prime, the search is guaranteed
12121 to stop at an unused slot or find the match. */
12123 /* Create a hash table to map DWO IDs to their CU/TU entry in
12124 .debug_{info,types}.dwo in DWP_FILE.
12125 Returns NULL if there isn't one.
12126 Note: This function processes DWP files only, not DWO files. */
12128 static struct dwp_hash_table
*
12129 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12130 struct dwp_file
*dwp_file
, int is_debug_types
)
12132 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12133 bfd
*dbfd
= dwp_file
->dbfd
;
12134 const gdb_byte
*index_ptr
, *index_end
;
12135 struct dwarf2_section_info
*index
;
12136 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12137 struct dwp_hash_table
*htab
;
12139 if (is_debug_types
)
12140 index
= &dwp_file
->sections
.tu_index
;
12142 index
= &dwp_file
->sections
.cu_index
;
12144 if (dwarf2_section_empty_p (index
))
12146 dwarf2_read_section (objfile
, index
);
12148 index_ptr
= index
->buffer
;
12149 index_end
= index_ptr
+ index
->size
;
12151 version
= read_4_bytes (dbfd
, index_ptr
);
12154 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12158 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12160 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12163 if (version
!= 1 && version
!= 2)
12165 error (_("Dwarf Error: unsupported DWP file version (%s)"
12166 " [in module %s]"),
12167 pulongest (version
), dwp_file
->name
);
12169 if (nr_slots
!= (nr_slots
& -nr_slots
))
12171 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12172 " is not power of 2 [in module %s]"),
12173 pulongest (nr_slots
), dwp_file
->name
);
12176 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12177 htab
->version
= version
;
12178 htab
->nr_columns
= nr_columns
;
12179 htab
->nr_units
= nr_units
;
12180 htab
->nr_slots
= nr_slots
;
12181 htab
->hash_table
= index_ptr
;
12182 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12184 /* Exit early if the table is empty. */
12185 if (nr_slots
== 0 || nr_units
== 0
12186 || (version
== 2 && nr_columns
== 0))
12188 /* All must be zero. */
12189 if (nr_slots
!= 0 || nr_units
!= 0
12190 || (version
== 2 && nr_columns
!= 0))
12192 complaint (&symfile_complaints
,
12193 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12194 " all zero [in modules %s]"),
12202 htab
->section_pool
.v1
.indices
=
12203 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12204 /* It's harder to decide whether the section is too small in v1.
12205 V1 is deprecated anyway so we punt. */
12209 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12210 int *ids
= htab
->section_pool
.v2
.section_ids
;
12211 /* Reverse map for error checking. */
12212 int ids_seen
[DW_SECT_MAX
+ 1];
12215 if (nr_columns
< 2)
12217 error (_("Dwarf Error: bad DWP hash table, too few columns"
12218 " in section table [in module %s]"),
12221 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12223 error (_("Dwarf Error: bad DWP hash table, too many columns"
12224 " in section table [in module %s]"),
12227 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12228 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12229 for (i
= 0; i
< nr_columns
; ++i
)
12231 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12233 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12235 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12236 " in section table [in module %s]"),
12237 id
, dwp_file
->name
);
12239 if (ids_seen
[id
] != -1)
12241 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12242 " id %d in section table [in module %s]"),
12243 id
, dwp_file
->name
);
12248 /* Must have exactly one info or types section. */
12249 if (((ids_seen
[DW_SECT_INFO
] != -1)
12250 + (ids_seen
[DW_SECT_TYPES
] != -1))
12253 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12254 " DWO info/types section [in module %s]"),
12257 /* Must have an abbrev section. */
12258 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12260 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12261 " section [in module %s]"),
12264 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12265 htab
->section_pool
.v2
.sizes
=
12266 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12267 * nr_units
* nr_columns
);
12268 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12269 * nr_units
* nr_columns
))
12272 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12273 " [in module %s]"),
12281 /* Update SECTIONS with the data from SECTP.
12283 This function is like the other "locate" section routines that are
12284 passed to bfd_map_over_sections, but in this context the sections to
12285 read comes from the DWP V1 hash table, not the full ELF section table.
12287 The result is non-zero for success, or zero if an error was found. */
12290 locate_v1_virtual_dwo_sections (asection
*sectp
,
12291 struct virtual_v1_dwo_sections
*sections
)
12293 const struct dwop_section_names
*names
= &dwop_section_names
;
12295 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12297 /* There can be only one. */
12298 if (sections
->abbrev
.s
.section
!= NULL
)
12300 sections
->abbrev
.s
.section
= sectp
;
12301 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12303 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12304 || section_is_p (sectp
->name
, &names
->types_dwo
))
12306 /* There can be only one. */
12307 if (sections
->info_or_types
.s
.section
!= NULL
)
12309 sections
->info_or_types
.s
.section
= sectp
;
12310 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12312 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12314 /* There can be only one. */
12315 if (sections
->line
.s
.section
!= NULL
)
12317 sections
->line
.s
.section
= sectp
;
12318 sections
->line
.size
= bfd_get_section_size (sectp
);
12320 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12322 /* There can be only one. */
12323 if (sections
->loc
.s
.section
!= NULL
)
12325 sections
->loc
.s
.section
= sectp
;
12326 sections
->loc
.size
= bfd_get_section_size (sectp
);
12328 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12330 /* There can be only one. */
12331 if (sections
->macinfo
.s
.section
!= NULL
)
12333 sections
->macinfo
.s
.section
= sectp
;
12334 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12336 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12338 /* There can be only one. */
12339 if (sections
->macro
.s
.section
!= NULL
)
12341 sections
->macro
.s
.section
= sectp
;
12342 sections
->macro
.size
= bfd_get_section_size (sectp
);
12344 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12346 /* There can be only one. */
12347 if (sections
->str_offsets
.s
.section
!= NULL
)
12349 sections
->str_offsets
.s
.section
= sectp
;
12350 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12354 /* No other kind of section is valid. */
12361 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12362 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12363 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12364 This is for DWP version 1 files. */
12366 static struct dwo_unit
*
12367 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12368 struct dwp_file
*dwp_file
,
12369 uint32_t unit_index
,
12370 const char *comp_dir
,
12371 ULONGEST signature
, int is_debug_types
)
12373 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12374 const struct dwp_hash_table
*dwp_htab
=
12375 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12376 bfd
*dbfd
= dwp_file
->dbfd
;
12377 const char *kind
= is_debug_types
? "TU" : "CU";
12378 struct dwo_file
*dwo_file
;
12379 struct dwo_unit
*dwo_unit
;
12380 struct virtual_v1_dwo_sections sections
;
12381 void **dwo_file_slot
;
12384 gdb_assert (dwp_file
->version
== 1);
12386 if (dwarf_read_debug
)
12388 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12390 pulongest (unit_index
), hex_string (signature
),
12394 /* Fetch the sections of this DWO unit.
12395 Put a limit on the number of sections we look for so that bad data
12396 doesn't cause us to loop forever. */
12398 #define MAX_NR_V1_DWO_SECTIONS \
12399 (1 /* .debug_info or .debug_types */ \
12400 + 1 /* .debug_abbrev */ \
12401 + 1 /* .debug_line */ \
12402 + 1 /* .debug_loc */ \
12403 + 1 /* .debug_str_offsets */ \
12404 + 1 /* .debug_macro or .debug_macinfo */ \
12405 + 1 /* trailing zero */)
12407 memset (§ions
, 0, sizeof (sections
));
12409 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12412 uint32_t section_nr
=
12413 read_4_bytes (dbfd
,
12414 dwp_htab
->section_pool
.v1
.indices
12415 + (unit_index
+ i
) * sizeof (uint32_t));
12417 if (section_nr
== 0)
12419 if (section_nr
>= dwp_file
->num_sections
)
12421 error (_("Dwarf Error: bad DWP hash table, section number too large"
12422 " [in module %s]"),
12426 sectp
= dwp_file
->elf_sections
[section_nr
];
12427 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12429 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12430 " [in module %s]"),
12436 || dwarf2_section_empty_p (§ions
.info_or_types
)
12437 || dwarf2_section_empty_p (§ions
.abbrev
))
12439 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12440 " [in module %s]"),
12443 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12445 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12446 " [in module %s]"),
12450 /* It's easier for the rest of the code if we fake a struct dwo_file and
12451 have dwo_unit "live" in that. At least for now.
12453 The DWP file can be made up of a random collection of CUs and TUs.
12454 However, for each CU + set of TUs that came from the same original DWO
12455 file, we can combine them back into a virtual DWO file to save space
12456 (fewer struct dwo_file objects to allocate). Remember that for really
12457 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12459 std::string virtual_dwo_name
=
12460 string_printf ("virtual-dwo/%d-%d-%d-%d",
12461 get_section_id (§ions
.abbrev
),
12462 get_section_id (§ions
.line
),
12463 get_section_id (§ions
.loc
),
12464 get_section_id (§ions
.str_offsets
));
12465 /* Can we use an existing virtual DWO file? */
12466 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12467 virtual_dwo_name
.c_str (),
12469 /* Create one if necessary. */
12470 if (*dwo_file_slot
== NULL
)
12472 if (dwarf_read_debug
)
12474 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12475 virtual_dwo_name
.c_str ());
12477 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12479 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12480 virtual_dwo_name
.c_str (),
12481 virtual_dwo_name
.size ());
12482 dwo_file
->comp_dir
= comp_dir
;
12483 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12484 dwo_file
->sections
.line
= sections
.line
;
12485 dwo_file
->sections
.loc
= sections
.loc
;
12486 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12487 dwo_file
->sections
.macro
= sections
.macro
;
12488 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12489 /* The "str" section is global to the entire DWP file. */
12490 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12491 /* The info or types section is assigned below to dwo_unit,
12492 there's no need to record it in dwo_file.
12493 Also, we can't simply record type sections in dwo_file because
12494 we record a pointer into the vector in dwo_unit. As we collect more
12495 types we'll grow the vector and eventually have to reallocate space
12496 for it, invalidating all copies of pointers into the previous
12498 *dwo_file_slot
= dwo_file
;
12502 if (dwarf_read_debug
)
12504 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12505 virtual_dwo_name
.c_str ());
12507 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12510 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12511 dwo_unit
->dwo_file
= dwo_file
;
12512 dwo_unit
->signature
= signature
;
12513 dwo_unit
->section
=
12514 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12515 *dwo_unit
->section
= sections
.info_or_types
;
12516 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12521 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12522 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12523 piece within that section used by a TU/CU, return a virtual section
12524 of just that piece. */
12526 static struct dwarf2_section_info
12527 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12528 struct dwarf2_section_info
*section
,
12529 bfd_size_type offset
, bfd_size_type size
)
12531 struct dwarf2_section_info result
;
12534 gdb_assert (section
!= NULL
);
12535 gdb_assert (!section
->is_virtual
);
12537 memset (&result
, 0, sizeof (result
));
12538 result
.s
.containing_section
= section
;
12539 result
.is_virtual
= 1;
12544 sectp
= get_section_bfd_section (section
);
12546 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12547 bounds of the real section. This is a pretty-rare event, so just
12548 flag an error (easier) instead of a warning and trying to cope. */
12550 || offset
+ size
> bfd_get_section_size (sectp
))
12552 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12553 " in section %s [in module %s]"),
12554 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12555 objfile_name (dwarf2_per_objfile
->objfile
));
12558 result
.virtual_offset
= offset
;
12559 result
.size
= size
;
12563 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12564 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12565 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12566 This is for DWP version 2 files. */
12568 static struct dwo_unit
*
12569 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12570 struct dwp_file
*dwp_file
,
12571 uint32_t unit_index
,
12572 const char *comp_dir
,
12573 ULONGEST signature
, int is_debug_types
)
12575 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12576 const struct dwp_hash_table
*dwp_htab
=
12577 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12578 bfd
*dbfd
= dwp_file
->dbfd
;
12579 const char *kind
= is_debug_types
? "TU" : "CU";
12580 struct dwo_file
*dwo_file
;
12581 struct dwo_unit
*dwo_unit
;
12582 struct virtual_v2_dwo_sections sections
;
12583 void **dwo_file_slot
;
12586 gdb_assert (dwp_file
->version
== 2);
12588 if (dwarf_read_debug
)
12590 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12592 pulongest (unit_index
), hex_string (signature
),
12596 /* Fetch the section offsets of this DWO unit. */
12598 memset (§ions
, 0, sizeof (sections
));
12600 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12602 uint32_t offset
= read_4_bytes (dbfd
,
12603 dwp_htab
->section_pool
.v2
.offsets
12604 + (((unit_index
- 1) * dwp_htab
->nr_columns
12606 * sizeof (uint32_t)));
12607 uint32_t size
= read_4_bytes (dbfd
,
12608 dwp_htab
->section_pool
.v2
.sizes
12609 + (((unit_index
- 1) * dwp_htab
->nr_columns
12611 * sizeof (uint32_t)));
12613 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12616 case DW_SECT_TYPES
:
12617 sections
.info_or_types_offset
= offset
;
12618 sections
.info_or_types_size
= size
;
12620 case DW_SECT_ABBREV
:
12621 sections
.abbrev_offset
= offset
;
12622 sections
.abbrev_size
= size
;
12625 sections
.line_offset
= offset
;
12626 sections
.line_size
= size
;
12629 sections
.loc_offset
= offset
;
12630 sections
.loc_size
= size
;
12632 case DW_SECT_STR_OFFSETS
:
12633 sections
.str_offsets_offset
= offset
;
12634 sections
.str_offsets_size
= size
;
12636 case DW_SECT_MACINFO
:
12637 sections
.macinfo_offset
= offset
;
12638 sections
.macinfo_size
= size
;
12640 case DW_SECT_MACRO
:
12641 sections
.macro_offset
= offset
;
12642 sections
.macro_size
= size
;
12647 /* It's easier for the rest of the code if we fake a struct dwo_file and
12648 have dwo_unit "live" in that. At least for now.
12650 The DWP file can be made up of a random collection of CUs and TUs.
12651 However, for each CU + set of TUs that came from the same original DWO
12652 file, we can combine them back into a virtual DWO file to save space
12653 (fewer struct dwo_file objects to allocate). Remember that for really
12654 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12656 std::string virtual_dwo_name
=
12657 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12658 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12659 (long) (sections
.line_size
? sections
.line_offset
: 0),
12660 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12661 (long) (sections
.str_offsets_size
12662 ? sections
.str_offsets_offset
: 0));
12663 /* Can we use an existing virtual DWO file? */
12664 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12665 virtual_dwo_name
.c_str (),
12667 /* Create one if necessary. */
12668 if (*dwo_file_slot
== NULL
)
12670 if (dwarf_read_debug
)
12672 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12673 virtual_dwo_name
.c_str ());
12675 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12677 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12678 virtual_dwo_name
.c_str (),
12679 virtual_dwo_name
.size ());
12680 dwo_file
->comp_dir
= comp_dir
;
12681 dwo_file
->sections
.abbrev
=
12682 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12683 sections
.abbrev_offset
, sections
.abbrev_size
);
12684 dwo_file
->sections
.line
=
12685 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12686 sections
.line_offset
, sections
.line_size
);
12687 dwo_file
->sections
.loc
=
12688 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12689 sections
.loc_offset
, sections
.loc_size
);
12690 dwo_file
->sections
.macinfo
=
12691 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12692 sections
.macinfo_offset
, sections
.macinfo_size
);
12693 dwo_file
->sections
.macro
=
12694 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12695 sections
.macro_offset
, sections
.macro_size
);
12696 dwo_file
->sections
.str_offsets
=
12697 create_dwp_v2_section (dwarf2_per_objfile
,
12698 &dwp_file
->sections
.str_offsets
,
12699 sections
.str_offsets_offset
,
12700 sections
.str_offsets_size
);
12701 /* The "str" section is global to the entire DWP file. */
12702 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12703 /* The info or types section is assigned below to dwo_unit,
12704 there's no need to record it in dwo_file.
12705 Also, we can't simply record type sections in dwo_file because
12706 we record a pointer into the vector in dwo_unit. As we collect more
12707 types we'll grow the vector and eventually have to reallocate space
12708 for it, invalidating all copies of pointers into the previous
12710 *dwo_file_slot
= dwo_file
;
12714 if (dwarf_read_debug
)
12716 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12717 virtual_dwo_name
.c_str ());
12719 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12722 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12723 dwo_unit
->dwo_file
= dwo_file
;
12724 dwo_unit
->signature
= signature
;
12725 dwo_unit
->section
=
12726 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12727 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12729 ? &dwp_file
->sections
.types
12730 : &dwp_file
->sections
.info
,
12731 sections
.info_or_types_offset
,
12732 sections
.info_or_types_size
);
12733 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12738 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12739 Returns NULL if the signature isn't found. */
12741 static struct dwo_unit
*
12742 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12743 struct dwp_file
*dwp_file
, const char *comp_dir
,
12744 ULONGEST signature
, int is_debug_types
)
12746 const struct dwp_hash_table
*dwp_htab
=
12747 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12748 bfd
*dbfd
= dwp_file
->dbfd
;
12749 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12750 uint32_t hash
= signature
& mask
;
12751 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12754 struct dwo_unit find_dwo_cu
;
12756 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12757 find_dwo_cu
.signature
= signature
;
12758 slot
= htab_find_slot (is_debug_types
12759 ? dwp_file
->loaded_tus
12760 : dwp_file
->loaded_cus
,
12761 &find_dwo_cu
, INSERT
);
12764 return (struct dwo_unit
*) *slot
;
12766 /* Use a for loop so that we don't loop forever on bad debug info. */
12767 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12769 ULONGEST signature_in_table
;
12771 signature_in_table
=
12772 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12773 if (signature_in_table
== signature
)
12775 uint32_t unit_index
=
12776 read_4_bytes (dbfd
,
12777 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12779 if (dwp_file
->version
== 1)
12781 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12782 dwp_file
, unit_index
,
12783 comp_dir
, signature
,
12788 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12789 dwp_file
, unit_index
,
12790 comp_dir
, signature
,
12793 return (struct dwo_unit
*) *slot
;
12795 if (signature_in_table
== 0)
12797 hash
= (hash
+ hash2
) & mask
;
12800 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12801 " [in module %s]"),
12805 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12806 Open the file specified by FILE_NAME and hand it off to BFD for
12807 preliminary analysis. Return a newly initialized bfd *, which
12808 includes a canonicalized copy of FILE_NAME.
12809 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12810 SEARCH_CWD is true if the current directory is to be searched.
12811 It will be searched before debug-file-directory.
12812 If successful, the file is added to the bfd include table of the
12813 objfile's bfd (see gdb_bfd_record_inclusion).
12814 If unable to find/open the file, return NULL.
12815 NOTE: This function is derived from symfile_bfd_open. */
12817 static gdb_bfd_ref_ptr
12818 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12819 const char *file_name
, int is_dwp
, int search_cwd
)
12822 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12823 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12824 to debug_file_directory. */
12825 const char *search_path
;
12826 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12828 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12831 if (*debug_file_directory
!= '\0')
12833 search_path_holder
.reset (concat (".", dirname_separator_string
,
12834 debug_file_directory
,
12836 search_path
= search_path_holder
.get ();
12842 search_path
= debug_file_directory
;
12844 openp_flags flags
= OPF_RETURN_REALPATH
;
12846 flags
|= OPF_SEARCH_IN_PATH
;
12848 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12849 desc
= openp (search_path
, flags
, file_name
,
12850 O_RDONLY
| O_BINARY
, &absolute_name
);
12854 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12856 if (sym_bfd
== NULL
)
12858 bfd_set_cacheable (sym_bfd
.get (), 1);
12860 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12863 /* Success. Record the bfd as having been included by the objfile's bfd.
12864 This is important because things like demangled_names_hash lives in the
12865 objfile's per_bfd space and may have references to things like symbol
12866 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12867 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12872 /* Try to open DWO file FILE_NAME.
12873 COMP_DIR is the DW_AT_comp_dir attribute.
12874 The result is the bfd handle of the file.
12875 If there is a problem finding or opening the file, return NULL.
12876 Upon success, the canonicalized path of the file is stored in the bfd,
12877 same as symfile_bfd_open. */
12879 static gdb_bfd_ref_ptr
12880 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12881 const char *file_name
, const char *comp_dir
)
12883 if (IS_ABSOLUTE_PATH (file_name
))
12884 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12885 0 /*is_dwp*/, 0 /*search_cwd*/);
12887 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12889 if (comp_dir
!= NULL
)
12891 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12892 file_name
, (char *) NULL
);
12894 /* NOTE: If comp_dir is a relative path, this will also try the
12895 search path, which seems useful. */
12896 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12899 1 /*search_cwd*/));
12900 xfree (path_to_try
);
12905 /* That didn't work, try debug-file-directory, which, despite its name,
12906 is a list of paths. */
12908 if (*debug_file_directory
== '\0')
12911 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12912 0 /*is_dwp*/, 1 /*search_cwd*/);
12915 /* This function is mapped across the sections and remembers the offset and
12916 size of each of the DWO debugging sections we are interested in. */
12919 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12921 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12922 const struct dwop_section_names
*names
= &dwop_section_names
;
12924 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12926 dwo_sections
->abbrev
.s
.section
= sectp
;
12927 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12929 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12931 dwo_sections
->info
.s
.section
= sectp
;
12932 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12934 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12936 dwo_sections
->line
.s
.section
= sectp
;
12937 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12939 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12941 dwo_sections
->loc
.s
.section
= sectp
;
12942 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12944 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12946 dwo_sections
->macinfo
.s
.section
= sectp
;
12947 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12949 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12951 dwo_sections
->macro
.s
.section
= sectp
;
12952 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12954 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12956 dwo_sections
->str
.s
.section
= sectp
;
12957 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12959 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12961 dwo_sections
->str_offsets
.s
.section
= sectp
;
12962 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12964 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12966 struct dwarf2_section_info type_section
;
12968 memset (&type_section
, 0, sizeof (type_section
));
12969 type_section
.s
.section
= sectp
;
12970 type_section
.size
= bfd_get_section_size (sectp
);
12971 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12976 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12977 by PER_CU. This is for the non-DWP case.
12978 The result is NULL if DWO_NAME can't be found. */
12980 static struct dwo_file
*
12981 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12982 const char *dwo_name
, const char *comp_dir
)
12984 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12985 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12986 struct dwo_file
*dwo_file
;
12987 struct cleanup
*cleanups
;
12989 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12992 if (dwarf_read_debug
)
12993 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12996 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12997 dwo_file
->dwo_name
= dwo_name
;
12998 dwo_file
->comp_dir
= comp_dir
;
12999 dwo_file
->dbfd
= dbfd
.release ();
13001 free_dwo_file_cleanup_data
*cleanup_data
= XNEW (free_dwo_file_cleanup_data
);
13002 cleanup_data
->dwo_file
= dwo_file
;
13003 cleanup_data
->dwarf2_per_objfile
= dwarf2_per_objfile
;
13005 cleanups
= make_cleanup (free_dwo_file_cleanup
, cleanup_data
);
13007 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
13008 &dwo_file
->sections
);
13010 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
13013 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
,
13014 dwo_file
->sections
.types
, dwo_file
->tus
);
13016 discard_cleanups (cleanups
);
13018 if (dwarf_read_debug
)
13019 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13024 /* This function is mapped across the sections and remembers the offset and
13025 size of each of the DWP debugging sections common to version 1 and 2 that
13026 we are interested in. */
13029 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13030 void *dwp_file_ptr
)
13032 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13033 const struct dwop_section_names
*names
= &dwop_section_names
;
13034 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13036 /* Record the ELF section number for later lookup: this is what the
13037 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13038 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13039 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13041 /* Look for specific sections that we need. */
13042 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13044 dwp_file
->sections
.str
.s
.section
= sectp
;
13045 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
13047 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13049 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13050 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
13052 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13054 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13055 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
13059 /* This function is mapped across the sections and remembers the offset and
13060 size of each of the DWP version 2 debugging sections that we are interested
13061 in. This is split into a separate function because we don't know if we
13062 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13065 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13067 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13068 const struct dwop_section_names
*names
= &dwop_section_names
;
13069 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13071 /* Record the ELF section number for later lookup: this is what the
13072 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13073 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13074 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13076 /* Look for specific sections that we need. */
13077 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13079 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13080 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
13082 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13084 dwp_file
->sections
.info
.s
.section
= sectp
;
13085 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
13087 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13089 dwp_file
->sections
.line
.s
.section
= sectp
;
13090 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13092 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13094 dwp_file
->sections
.loc
.s
.section
= sectp
;
13095 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13097 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13099 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13100 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13102 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13104 dwp_file
->sections
.macro
.s
.section
= sectp
;
13105 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13107 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13109 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13110 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13112 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13114 dwp_file
->sections
.types
.s
.section
= sectp
;
13115 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13119 /* Hash function for dwp_file loaded CUs/TUs. */
13122 hash_dwp_loaded_cutus (const void *item
)
13124 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13126 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13127 return dwo_unit
->signature
;
13130 /* Equality function for dwp_file loaded CUs/TUs. */
13133 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13135 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13136 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13138 return dua
->signature
== dub
->signature
;
13141 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13144 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13146 return htab_create_alloc_ex (3,
13147 hash_dwp_loaded_cutus
,
13148 eq_dwp_loaded_cutus
,
13150 &objfile
->objfile_obstack
,
13151 hashtab_obstack_allocate
,
13152 dummy_obstack_deallocate
);
13155 /* Try to open DWP file FILE_NAME.
13156 The result is the bfd handle of the file.
13157 If there is a problem finding or opening the file, return NULL.
13158 Upon success, the canonicalized path of the file is stored in the bfd,
13159 same as symfile_bfd_open. */
13161 static gdb_bfd_ref_ptr
13162 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13163 const char *file_name
)
13165 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13167 1 /*search_cwd*/));
13171 /* Work around upstream bug 15652.
13172 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13173 [Whether that's a "bug" is debatable, but it is getting in our way.]
13174 We have no real idea where the dwp file is, because gdb's realpath-ing
13175 of the executable's path may have discarded the needed info.
13176 [IWBN if the dwp file name was recorded in the executable, akin to
13177 .gnu_debuglink, but that doesn't exist yet.]
13178 Strip the directory from FILE_NAME and search again. */
13179 if (*debug_file_directory
!= '\0')
13181 /* Don't implicitly search the current directory here.
13182 If the user wants to search "." to handle this case,
13183 it must be added to debug-file-directory. */
13184 return try_open_dwop_file (dwarf2_per_objfile
,
13185 lbasename (file_name
), 1 /*is_dwp*/,
13192 /* Initialize the use of the DWP file for the current objfile.
13193 By convention the name of the DWP file is ${objfile}.dwp.
13194 The result is NULL if it can't be found. */
13196 static struct dwp_file
*
13197 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13199 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13200 struct dwp_file
*dwp_file
;
13202 /* Try to find first .dwp for the binary file before any symbolic links
13205 /* If the objfile is a debug file, find the name of the real binary
13206 file and get the name of dwp file from there. */
13207 std::string dwp_name
;
13208 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13210 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13211 const char *backlink_basename
= lbasename (backlink
->original_name
);
13213 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13216 dwp_name
= objfile
->original_name
;
13218 dwp_name
+= ".dwp";
13220 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13222 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13224 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13225 dwp_name
= objfile_name (objfile
);
13226 dwp_name
+= ".dwp";
13227 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13232 if (dwarf_read_debug
)
13233 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13236 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
13237 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
13238 dwp_file
->dbfd
= dbfd
.release ();
13240 /* +1: section 0 is unused */
13241 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13242 dwp_file
->elf_sections
=
13243 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13244 dwp_file
->num_sections
, asection
*);
13246 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
13249 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 0);
13251 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 1);
13253 /* The DWP file version is stored in the hash table. Oh well. */
13254 if (dwp_file
->cus
&& dwp_file
->tus
13255 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13257 /* Technically speaking, we should try to limp along, but this is
13258 pretty bizarre. We use pulongest here because that's the established
13259 portability solution (e.g, we cannot use %u for uint32_t). */
13260 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13261 " TU version %s [in DWP file %s]"),
13262 pulongest (dwp_file
->cus
->version
),
13263 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13267 dwp_file
->version
= dwp_file
->cus
->version
;
13268 else if (dwp_file
->tus
)
13269 dwp_file
->version
= dwp_file
->tus
->version
;
13271 dwp_file
->version
= 2;
13273 if (dwp_file
->version
== 2)
13274 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
13277 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13278 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13280 if (dwarf_read_debug
)
13282 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13283 fprintf_unfiltered (gdb_stdlog
,
13284 " %s CUs, %s TUs\n",
13285 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13286 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13292 /* Wrapper around open_and_init_dwp_file, only open it once. */
13294 static struct dwp_file
*
13295 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13297 if (! dwarf2_per_objfile
->dwp_checked
)
13299 dwarf2_per_objfile
->dwp_file
13300 = open_and_init_dwp_file (dwarf2_per_objfile
);
13301 dwarf2_per_objfile
->dwp_checked
= 1;
13303 return dwarf2_per_objfile
->dwp_file
;
13306 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13307 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13308 or in the DWP file for the objfile, referenced by THIS_UNIT.
13309 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13310 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13312 This is called, for example, when wanting to read a variable with a
13313 complex location. Therefore we don't want to do file i/o for every call.
13314 Therefore we don't want to look for a DWO file on every call.
13315 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13316 then we check if we've already seen DWO_NAME, and only THEN do we check
13319 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13320 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13322 static struct dwo_unit
*
13323 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13324 const char *dwo_name
, const char *comp_dir
,
13325 ULONGEST signature
, int is_debug_types
)
13327 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13328 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13329 const char *kind
= is_debug_types
? "TU" : "CU";
13330 void **dwo_file_slot
;
13331 struct dwo_file
*dwo_file
;
13332 struct dwp_file
*dwp_file
;
13334 /* First see if there's a DWP file.
13335 If we have a DWP file but didn't find the DWO inside it, don't
13336 look for the original DWO file. It makes gdb behave differently
13337 depending on whether one is debugging in the build tree. */
13339 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13340 if (dwp_file
!= NULL
)
13342 const struct dwp_hash_table
*dwp_htab
=
13343 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13345 if (dwp_htab
!= NULL
)
13347 struct dwo_unit
*dwo_cutu
=
13348 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13349 signature
, is_debug_types
);
13351 if (dwo_cutu
!= NULL
)
13353 if (dwarf_read_debug
)
13355 fprintf_unfiltered (gdb_stdlog
,
13356 "Virtual DWO %s %s found: @%s\n",
13357 kind
, hex_string (signature
),
13358 host_address_to_string (dwo_cutu
));
13366 /* No DWP file, look for the DWO file. */
13368 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13369 dwo_name
, comp_dir
);
13370 if (*dwo_file_slot
== NULL
)
13372 /* Read in the file and build a table of the CUs/TUs it contains. */
13373 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13375 /* NOTE: This will be NULL if unable to open the file. */
13376 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13378 if (dwo_file
!= NULL
)
13380 struct dwo_unit
*dwo_cutu
= NULL
;
13382 if (is_debug_types
&& dwo_file
->tus
)
13384 struct dwo_unit find_dwo_cutu
;
13386 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13387 find_dwo_cutu
.signature
= signature
;
13389 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13391 else if (!is_debug_types
&& dwo_file
->cus
)
13393 struct dwo_unit find_dwo_cutu
;
13395 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13396 find_dwo_cutu
.signature
= signature
;
13397 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13401 if (dwo_cutu
!= NULL
)
13403 if (dwarf_read_debug
)
13405 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13406 kind
, dwo_name
, hex_string (signature
),
13407 host_address_to_string (dwo_cutu
));
13414 /* We didn't find it. This could mean a dwo_id mismatch, or
13415 someone deleted the DWO/DWP file, or the search path isn't set up
13416 correctly to find the file. */
13418 if (dwarf_read_debug
)
13420 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13421 kind
, dwo_name
, hex_string (signature
));
13424 /* This is a warning and not a complaint because it can be caused by
13425 pilot error (e.g., user accidentally deleting the DWO). */
13427 /* Print the name of the DWP file if we looked there, helps the user
13428 better diagnose the problem. */
13429 std::string dwp_text
;
13431 if (dwp_file
!= NULL
)
13432 dwp_text
= string_printf (" [in DWP file %s]",
13433 lbasename (dwp_file
->name
));
13435 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13436 " [in module %s]"),
13437 kind
, dwo_name
, hex_string (signature
),
13439 this_unit
->is_debug_types
? "TU" : "CU",
13440 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13445 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13446 See lookup_dwo_cutu_unit for details. */
13448 static struct dwo_unit
*
13449 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13450 const char *dwo_name
, const char *comp_dir
,
13451 ULONGEST signature
)
13453 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13456 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13457 See lookup_dwo_cutu_unit for details. */
13459 static struct dwo_unit
*
13460 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13461 const char *dwo_name
, const char *comp_dir
)
13463 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13466 /* Traversal function for queue_and_load_all_dwo_tus. */
13469 queue_and_load_dwo_tu (void **slot
, void *info
)
13471 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13472 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13473 ULONGEST signature
= dwo_unit
->signature
;
13474 struct signatured_type
*sig_type
=
13475 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13477 if (sig_type
!= NULL
)
13479 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13481 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13482 a real dependency of PER_CU on SIG_TYPE. That is detected later
13483 while processing PER_CU. */
13484 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13485 load_full_type_unit (sig_cu
);
13486 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13492 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13493 The DWO may have the only definition of the type, though it may not be
13494 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13495 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13498 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13500 struct dwo_unit
*dwo_unit
;
13501 struct dwo_file
*dwo_file
;
13503 gdb_assert (!per_cu
->is_debug_types
);
13504 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13505 gdb_assert (per_cu
->cu
!= NULL
);
13507 dwo_unit
= per_cu
->cu
->dwo_unit
;
13508 gdb_assert (dwo_unit
!= NULL
);
13510 dwo_file
= dwo_unit
->dwo_file
;
13511 if (dwo_file
->tus
!= NULL
)
13512 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13515 /* Free all resources associated with DWO_FILE.
13516 Close the DWO file and munmap the sections.
13517 All memory should be on the objfile obstack. */
13520 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
13523 /* Note: dbfd is NULL for virtual DWO files. */
13524 gdb_bfd_unref (dwo_file
->dbfd
);
13526 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13529 /* Wrapper for free_dwo_file for use in cleanups. */
13532 free_dwo_file_cleanup (void *arg
)
13534 struct free_dwo_file_cleanup_data
*data
13535 = (struct free_dwo_file_cleanup_data
*) arg
;
13536 struct objfile
*objfile
= data
->dwarf2_per_objfile
->objfile
;
13538 free_dwo_file (data
->dwo_file
, objfile
);
13543 /* Traversal function for free_dwo_files. */
13546 free_dwo_file_from_slot (void **slot
, void *info
)
13548 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13549 struct objfile
*objfile
= (struct objfile
*) info
;
13551 free_dwo_file (dwo_file
, objfile
);
13556 /* Free all resources associated with DWO_FILES. */
13559 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13561 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13564 /* Read in various DIEs. */
13566 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13567 Inherit only the children of the DW_AT_abstract_origin DIE not being
13568 already referenced by DW_AT_abstract_origin from the children of the
13572 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13574 struct die_info
*child_die
;
13575 sect_offset
*offsetp
;
13576 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13577 struct die_info
*origin_die
;
13578 /* Iterator of the ORIGIN_DIE children. */
13579 struct die_info
*origin_child_die
;
13580 struct attribute
*attr
;
13581 struct dwarf2_cu
*origin_cu
;
13582 struct pending
**origin_previous_list_in_scope
;
13584 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13588 /* Note that following die references may follow to a die in a
13592 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13594 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13596 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13597 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13599 if (die
->tag
!= origin_die
->tag
13600 && !(die
->tag
== DW_TAG_inlined_subroutine
13601 && origin_die
->tag
== DW_TAG_subprogram
))
13602 complaint (&symfile_complaints
,
13603 _("DIE %s and its abstract origin %s have different tags"),
13604 sect_offset_str (die
->sect_off
),
13605 sect_offset_str (origin_die
->sect_off
));
13607 std::vector
<sect_offset
> offsets
;
13609 for (child_die
= die
->child
;
13610 child_die
&& child_die
->tag
;
13611 child_die
= sibling_die (child_die
))
13613 struct die_info
*child_origin_die
;
13614 struct dwarf2_cu
*child_origin_cu
;
13616 /* We are trying to process concrete instance entries:
13617 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13618 it's not relevant to our analysis here. i.e. detecting DIEs that are
13619 present in the abstract instance but not referenced in the concrete
13621 if (child_die
->tag
== DW_TAG_call_site
13622 || child_die
->tag
== DW_TAG_GNU_call_site
)
13625 /* For each CHILD_DIE, find the corresponding child of
13626 ORIGIN_DIE. If there is more than one layer of
13627 DW_AT_abstract_origin, follow them all; there shouldn't be,
13628 but GCC versions at least through 4.4 generate this (GCC PR
13630 child_origin_die
= child_die
;
13631 child_origin_cu
= cu
;
13634 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13638 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13642 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13643 counterpart may exist. */
13644 if (child_origin_die
!= child_die
)
13646 if (child_die
->tag
!= child_origin_die
->tag
13647 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13648 && child_origin_die
->tag
== DW_TAG_subprogram
))
13649 complaint (&symfile_complaints
,
13650 _("Child DIE %s and its abstract origin %s have "
13652 sect_offset_str (child_die
->sect_off
),
13653 sect_offset_str (child_origin_die
->sect_off
));
13654 if (child_origin_die
->parent
!= origin_die
)
13655 complaint (&symfile_complaints
,
13656 _("Child DIE %s and its abstract origin %s have "
13657 "different parents"),
13658 sect_offset_str (child_die
->sect_off
),
13659 sect_offset_str (child_origin_die
->sect_off
));
13661 offsets
.push_back (child_origin_die
->sect_off
);
13664 std::sort (offsets
.begin (), offsets
.end ());
13665 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13666 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13667 if (offsetp
[-1] == *offsetp
)
13668 complaint (&symfile_complaints
,
13669 _("Multiple children of DIE %s refer "
13670 "to DIE %s as their abstract origin"),
13671 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13673 offsetp
= offsets
.data ();
13674 origin_child_die
= origin_die
->child
;
13675 while (origin_child_die
&& origin_child_die
->tag
)
13677 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13678 while (offsetp
< offsets_end
13679 && *offsetp
< origin_child_die
->sect_off
)
13681 if (offsetp
>= offsets_end
13682 || *offsetp
> origin_child_die
->sect_off
)
13684 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13685 Check whether we're already processing ORIGIN_CHILD_DIE.
13686 This can happen with mutually referenced abstract_origins.
13688 if (!origin_child_die
->in_process
)
13689 process_die (origin_child_die
, origin_cu
);
13691 origin_child_die
= sibling_die (origin_child_die
);
13693 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13697 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13699 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13700 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13701 struct context_stack
*newobj
;
13704 struct die_info
*child_die
;
13705 struct attribute
*attr
, *call_line
, *call_file
;
13707 CORE_ADDR baseaddr
;
13708 struct block
*block
;
13709 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13710 std::vector
<struct symbol
*> template_args
;
13711 struct template_symbol
*templ_func
= NULL
;
13715 /* If we do not have call site information, we can't show the
13716 caller of this inlined function. That's too confusing, so
13717 only use the scope for local variables. */
13718 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13719 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13720 if (call_line
== NULL
|| call_file
== NULL
)
13722 read_lexical_block_scope (die
, cu
);
13727 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13729 name
= dwarf2_name (die
, cu
);
13731 /* Ignore functions with missing or empty names. These are actually
13732 illegal according to the DWARF standard. */
13735 complaint (&symfile_complaints
,
13736 _("missing name for subprogram DIE at %s"),
13737 sect_offset_str (die
->sect_off
));
13741 /* Ignore functions with missing or invalid low and high pc attributes. */
13742 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13743 <= PC_BOUNDS_INVALID
)
13745 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13746 if (!attr
|| !DW_UNSND (attr
))
13747 complaint (&symfile_complaints
,
13748 _("cannot get low and high bounds "
13749 "for subprogram DIE at %s"),
13750 sect_offset_str (die
->sect_off
));
13754 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13755 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13757 /* If we have any template arguments, then we must allocate a
13758 different sort of symbol. */
13759 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13761 if (child_die
->tag
== DW_TAG_template_type_param
13762 || child_die
->tag
== DW_TAG_template_value_param
)
13764 templ_func
= allocate_template_symbol (objfile
);
13765 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13770 newobj
= push_context (0, lowpc
);
13771 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13772 (struct symbol
*) templ_func
);
13774 /* If there is a location expression for DW_AT_frame_base, record
13776 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13778 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13780 /* If there is a location for the static link, record it. */
13781 newobj
->static_link
= NULL
;
13782 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13785 newobj
->static_link
13786 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13787 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13790 cu
->list_in_scope
= &local_symbols
;
13792 if (die
->child
!= NULL
)
13794 child_die
= die
->child
;
13795 while (child_die
&& child_die
->tag
)
13797 if (child_die
->tag
== DW_TAG_template_type_param
13798 || child_die
->tag
== DW_TAG_template_value_param
)
13800 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13803 template_args
.push_back (arg
);
13806 process_die (child_die
, cu
);
13807 child_die
= sibling_die (child_die
);
13811 inherit_abstract_dies (die
, cu
);
13813 /* If we have a DW_AT_specification, we might need to import using
13814 directives from the context of the specification DIE. See the
13815 comment in determine_prefix. */
13816 if (cu
->language
== language_cplus
13817 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13819 struct dwarf2_cu
*spec_cu
= cu
;
13820 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13824 child_die
= spec_die
->child
;
13825 while (child_die
&& child_die
->tag
)
13827 if (child_die
->tag
== DW_TAG_imported_module
)
13828 process_die (child_die
, spec_cu
);
13829 child_die
= sibling_die (child_die
);
13832 /* In some cases, GCC generates specification DIEs that
13833 themselves contain DW_AT_specification attributes. */
13834 spec_die
= die_specification (spec_die
, &spec_cu
);
13838 newobj
= pop_context ();
13839 /* Make a block for the local symbols within. */
13840 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13841 newobj
->static_link
, lowpc
, highpc
);
13843 /* For C++, set the block's scope. */
13844 if ((cu
->language
== language_cplus
13845 || cu
->language
== language_fortran
13846 || cu
->language
== language_d
13847 || cu
->language
== language_rust
)
13848 && cu
->processing_has_namespace_info
)
13849 block_set_scope (block
, determine_prefix (die
, cu
),
13850 &objfile
->objfile_obstack
);
13852 /* If we have address ranges, record them. */
13853 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13855 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13857 /* Attach template arguments to function. */
13858 if (!template_args
.empty ())
13860 gdb_assert (templ_func
!= NULL
);
13862 templ_func
->n_template_arguments
= template_args
.size ();
13863 templ_func
->template_arguments
13864 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13865 templ_func
->n_template_arguments
);
13866 memcpy (templ_func
->template_arguments
,
13867 template_args
.data (),
13868 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13871 /* In C++, we can have functions nested inside functions (e.g., when
13872 a function declares a class that has methods). This means that
13873 when we finish processing a function scope, we may need to go
13874 back to building a containing block's symbol lists. */
13875 local_symbols
= newobj
->locals
;
13876 local_using_directives
= newobj
->local_using_directives
;
13878 /* If we've finished processing a top-level function, subsequent
13879 symbols go in the file symbol list. */
13880 if (outermost_context_p ())
13881 cu
->list_in_scope
= &file_symbols
;
13884 /* Process all the DIES contained within a lexical block scope. Start
13885 a new scope, process the dies, and then close the scope. */
13888 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13890 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13891 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13892 struct context_stack
*newobj
;
13893 CORE_ADDR lowpc
, highpc
;
13894 struct die_info
*child_die
;
13895 CORE_ADDR baseaddr
;
13897 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13899 /* Ignore blocks with missing or invalid low and high pc attributes. */
13900 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13901 as multiple lexical blocks? Handling children in a sane way would
13902 be nasty. Might be easier to properly extend generic blocks to
13903 describe ranges. */
13904 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13906 case PC_BOUNDS_NOT_PRESENT
:
13907 /* DW_TAG_lexical_block has no attributes, process its children as if
13908 there was no wrapping by that DW_TAG_lexical_block.
13909 GCC does no longer produces such DWARF since GCC r224161. */
13910 for (child_die
= die
->child
;
13911 child_die
!= NULL
&& child_die
->tag
;
13912 child_die
= sibling_die (child_die
))
13913 process_die (child_die
, cu
);
13915 case PC_BOUNDS_INVALID
:
13918 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13919 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13921 push_context (0, lowpc
);
13922 if (die
->child
!= NULL
)
13924 child_die
= die
->child
;
13925 while (child_die
&& child_die
->tag
)
13927 process_die (child_die
, cu
);
13928 child_die
= sibling_die (child_die
);
13931 inherit_abstract_dies (die
, cu
);
13932 newobj
= pop_context ();
13934 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13936 struct block
*block
13937 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13938 newobj
->start_addr
, highpc
);
13940 /* Note that recording ranges after traversing children, as we
13941 do here, means that recording a parent's ranges entails
13942 walking across all its children's ranges as they appear in
13943 the address map, which is quadratic behavior.
13945 It would be nicer to record the parent's ranges before
13946 traversing its children, simply overriding whatever you find
13947 there. But since we don't even decide whether to create a
13948 block until after we've traversed its children, that's hard
13950 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13952 local_symbols
= newobj
->locals
;
13953 local_using_directives
= newobj
->local_using_directives
;
13956 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13959 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13961 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13962 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13963 CORE_ADDR pc
, baseaddr
;
13964 struct attribute
*attr
;
13965 struct call_site
*call_site
, call_site_local
;
13968 struct die_info
*child_die
;
13970 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13972 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13975 /* This was a pre-DWARF-5 GNU extension alias
13976 for DW_AT_call_return_pc. */
13977 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13981 complaint (&symfile_complaints
,
13982 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
13983 "DIE %s [in module %s]"),
13984 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13987 pc
= attr_value_as_address (attr
) + baseaddr
;
13988 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13990 if (cu
->call_site_htab
== NULL
)
13991 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13992 NULL
, &objfile
->objfile_obstack
,
13993 hashtab_obstack_allocate
, NULL
);
13994 call_site_local
.pc
= pc
;
13995 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13998 complaint (&symfile_complaints
,
13999 _("Duplicate PC %s for DW_TAG_call_site "
14000 "DIE %s [in module %s]"),
14001 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
14002 objfile_name (objfile
));
14006 /* Count parameters at the caller. */
14009 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
14010 child_die
= sibling_die (child_die
))
14012 if (child_die
->tag
!= DW_TAG_call_site_parameter
14013 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14015 complaint (&symfile_complaints
,
14016 _("Tag %d is not DW_TAG_call_site_parameter in "
14017 "DW_TAG_call_site child DIE %s [in module %s]"),
14018 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
14019 objfile_name (objfile
));
14027 = ((struct call_site
*)
14028 obstack_alloc (&objfile
->objfile_obstack
,
14029 sizeof (*call_site
)
14030 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
14032 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
14033 call_site
->pc
= pc
;
14035 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14036 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14038 struct die_info
*func_die
;
14040 /* Skip also over DW_TAG_inlined_subroutine. */
14041 for (func_die
= die
->parent
;
14042 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14043 && func_die
->tag
!= DW_TAG_subroutine_type
;
14044 func_die
= func_die
->parent
);
14046 /* DW_AT_call_all_calls is a superset
14047 of DW_AT_call_all_tail_calls. */
14049 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14050 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14051 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14052 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14054 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14055 not complete. But keep CALL_SITE for look ups via call_site_htab,
14056 both the initial caller containing the real return address PC and
14057 the final callee containing the current PC of a chain of tail
14058 calls do not need to have the tail call list complete. But any
14059 function candidate for a virtual tail call frame searched via
14060 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14061 determined unambiguously. */
14065 struct type
*func_type
= NULL
;
14068 func_type
= get_die_type (func_die
, cu
);
14069 if (func_type
!= NULL
)
14071 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14073 /* Enlist this call site to the function. */
14074 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14075 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14078 complaint (&symfile_complaints
,
14079 _("Cannot find function owning DW_TAG_call_site "
14080 "DIE %s [in module %s]"),
14081 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14085 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14087 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14089 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14092 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14093 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14095 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14096 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14097 /* Keep NULL DWARF_BLOCK. */;
14098 else if (attr_form_is_block (attr
))
14100 struct dwarf2_locexpr_baton
*dlbaton
;
14102 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14103 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14104 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14105 dlbaton
->per_cu
= cu
->per_cu
;
14107 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14109 else if (attr_form_is_ref (attr
))
14111 struct dwarf2_cu
*target_cu
= cu
;
14112 struct die_info
*target_die
;
14114 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14115 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14116 if (die_is_declaration (target_die
, target_cu
))
14118 const char *target_physname
;
14120 /* Prefer the mangled name; otherwise compute the demangled one. */
14121 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14122 if (target_physname
== NULL
)
14123 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14124 if (target_physname
== NULL
)
14125 complaint (&symfile_complaints
,
14126 _("DW_AT_call_target target DIE has invalid "
14127 "physname, for referencing DIE %s [in module %s]"),
14128 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14130 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14136 /* DW_AT_entry_pc should be preferred. */
14137 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14138 <= PC_BOUNDS_INVALID
)
14139 complaint (&symfile_complaints
,
14140 _("DW_AT_call_target target DIE has invalid "
14141 "low pc, for referencing DIE %s [in module %s]"),
14142 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14145 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14146 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14151 complaint (&symfile_complaints
,
14152 _("DW_TAG_call_site DW_AT_call_target is neither "
14153 "block nor reference, for DIE %s [in module %s]"),
14154 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14156 call_site
->per_cu
= cu
->per_cu
;
14158 for (child_die
= die
->child
;
14159 child_die
&& child_die
->tag
;
14160 child_die
= sibling_die (child_die
))
14162 struct call_site_parameter
*parameter
;
14163 struct attribute
*loc
, *origin
;
14165 if (child_die
->tag
!= DW_TAG_call_site_parameter
14166 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14168 /* Already printed the complaint above. */
14172 gdb_assert (call_site
->parameter_count
< nparams
);
14173 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14175 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14176 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14177 register is contained in DW_AT_call_value. */
14179 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14180 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14181 if (origin
== NULL
)
14183 /* This was a pre-DWARF-5 GNU extension alias
14184 for DW_AT_call_parameter. */
14185 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14187 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14189 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14191 sect_offset sect_off
14192 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14193 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14195 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14196 binding can be done only inside one CU. Such referenced DIE
14197 therefore cannot be even moved to DW_TAG_partial_unit. */
14198 complaint (&symfile_complaints
,
14199 _("DW_AT_call_parameter offset is not in CU for "
14200 "DW_TAG_call_site child DIE %s [in module %s]"),
14201 sect_offset_str (child_die
->sect_off
),
14202 objfile_name (objfile
));
14205 parameter
->u
.param_cu_off
14206 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14208 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14210 complaint (&symfile_complaints
,
14211 _("No DW_FORM_block* DW_AT_location for "
14212 "DW_TAG_call_site child DIE %s [in module %s]"),
14213 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14218 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14219 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14220 if (parameter
->u
.dwarf_reg
!= -1)
14221 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14222 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14223 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14224 ¶meter
->u
.fb_offset
))
14225 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14228 complaint (&symfile_complaints
,
14229 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14230 "for DW_FORM_block* DW_AT_location is supported for "
14231 "DW_TAG_call_site child DIE %s "
14233 sect_offset_str (child_die
->sect_off
),
14234 objfile_name (objfile
));
14239 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14241 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14242 if (!attr_form_is_block (attr
))
14244 complaint (&symfile_complaints
,
14245 _("No DW_FORM_block* DW_AT_call_value for "
14246 "DW_TAG_call_site child DIE %s [in module %s]"),
14247 sect_offset_str (child_die
->sect_off
),
14248 objfile_name (objfile
));
14251 parameter
->value
= DW_BLOCK (attr
)->data
;
14252 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14254 /* Parameters are not pre-cleared by memset above. */
14255 parameter
->data_value
= NULL
;
14256 parameter
->data_value_size
= 0;
14257 call_site
->parameter_count
++;
14259 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14261 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14264 if (!attr_form_is_block (attr
))
14265 complaint (&symfile_complaints
,
14266 _("No DW_FORM_block* DW_AT_call_data_value for "
14267 "DW_TAG_call_site child DIE %s [in module %s]"),
14268 sect_offset_str (child_die
->sect_off
),
14269 objfile_name (objfile
));
14272 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14273 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14279 /* Helper function for read_variable. If DIE represents a virtual
14280 table, then return the type of the concrete object that is
14281 associated with the virtual table. Otherwise, return NULL. */
14283 static struct type
*
14284 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14286 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14290 /* Find the type DIE. */
14291 struct die_info
*type_die
= NULL
;
14292 struct dwarf2_cu
*type_cu
= cu
;
14294 if (attr_form_is_ref (attr
))
14295 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14296 if (type_die
== NULL
)
14299 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14301 return die_containing_type (type_die
, type_cu
);
14304 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14307 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14309 struct rust_vtable_symbol
*storage
= NULL
;
14311 if (cu
->language
== language_rust
)
14313 struct type
*containing_type
= rust_containing_type (die
, cu
);
14315 if (containing_type
!= NULL
)
14317 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14319 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14320 struct rust_vtable_symbol
);
14321 initialize_objfile_symbol (storage
);
14322 storage
->concrete_type
= containing_type
;
14323 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14327 new_symbol (die
, NULL
, cu
, storage
);
14330 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14331 reading .debug_rnglists.
14332 Callback's type should be:
14333 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14334 Return true if the attributes are present and valid, otherwise,
14337 template <typename Callback
>
14339 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14340 Callback
&&callback
)
14342 struct dwarf2_per_objfile
*dwarf2_per_objfile
14343 = cu
->per_cu
->dwarf2_per_objfile
;
14344 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14345 bfd
*obfd
= objfile
->obfd
;
14346 /* Base address selection entry. */
14349 const gdb_byte
*buffer
;
14350 CORE_ADDR baseaddr
;
14351 bool overflow
= false;
14353 found_base
= cu
->base_known
;
14354 base
= cu
->base_address
;
14356 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14357 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14359 complaint (&symfile_complaints
,
14360 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14364 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14366 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14370 /* Initialize it due to a false compiler warning. */
14371 CORE_ADDR range_beginning
= 0, range_end
= 0;
14372 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14373 + dwarf2_per_objfile
->rnglists
.size
);
14374 unsigned int bytes_read
;
14376 if (buffer
== buf_end
)
14381 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14384 case DW_RLE_end_of_list
:
14386 case DW_RLE_base_address
:
14387 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14392 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14394 buffer
+= bytes_read
;
14396 case DW_RLE_start_length
:
14397 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14402 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14403 buffer
+= bytes_read
;
14404 range_end
= (range_beginning
14405 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14406 buffer
+= bytes_read
;
14407 if (buffer
> buf_end
)
14413 case DW_RLE_offset_pair
:
14414 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14415 buffer
+= bytes_read
;
14416 if (buffer
> buf_end
)
14421 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14422 buffer
+= bytes_read
;
14423 if (buffer
> buf_end
)
14429 case DW_RLE_start_end
:
14430 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14435 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14436 buffer
+= bytes_read
;
14437 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14438 buffer
+= bytes_read
;
14441 complaint (&symfile_complaints
,
14442 _("Invalid .debug_rnglists data (no base address)"));
14445 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14447 if (rlet
== DW_RLE_base_address
)
14452 /* We have no valid base address for the ranges
14454 complaint (&symfile_complaints
,
14455 _("Invalid .debug_rnglists data (no base address)"));
14459 if (range_beginning
> range_end
)
14461 /* Inverted range entries are invalid. */
14462 complaint (&symfile_complaints
,
14463 _("Invalid .debug_rnglists data (inverted range)"));
14467 /* Empty range entries have no effect. */
14468 if (range_beginning
== range_end
)
14471 range_beginning
+= base
;
14474 /* A not-uncommon case of bad debug info.
14475 Don't pollute the addrmap with bad data. */
14476 if (range_beginning
+ baseaddr
== 0
14477 && !dwarf2_per_objfile
->has_section_at_zero
)
14479 complaint (&symfile_complaints
,
14480 _(".debug_rnglists entry has start address of zero"
14481 " [in module %s]"), objfile_name (objfile
));
14485 callback (range_beginning
, range_end
);
14490 complaint (&symfile_complaints
,
14491 _("Offset %d is not terminated "
14492 "for DW_AT_ranges attribute"),
14500 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14501 Callback's type should be:
14502 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14503 Return 1 if the attributes are present and valid, otherwise, return 0. */
14505 template <typename Callback
>
14507 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14508 Callback
&&callback
)
14510 struct dwarf2_per_objfile
*dwarf2_per_objfile
14511 = cu
->per_cu
->dwarf2_per_objfile
;
14512 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14513 struct comp_unit_head
*cu_header
= &cu
->header
;
14514 bfd
*obfd
= objfile
->obfd
;
14515 unsigned int addr_size
= cu_header
->addr_size
;
14516 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14517 /* Base address selection entry. */
14520 unsigned int dummy
;
14521 const gdb_byte
*buffer
;
14522 CORE_ADDR baseaddr
;
14524 if (cu_header
->version
>= 5)
14525 return dwarf2_rnglists_process (offset
, cu
, callback
);
14527 found_base
= cu
->base_known
;
14528 base
= cu
->base_address
;
14530 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14531 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14533 complaint (&symfile_complaints
,
14534 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14538 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14540 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14544 CORE_ADDR range_beginning
, range_end
;
14546 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14547 buffer
+= addr_size
;
14548 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14549 buffer
+= addr_size
;
14550 offset
+= 2 * addr_size
;
14552 /* An end of list marker is a pair of zero addresses. */
14553 if (range_beginning
== 0 && range_end
== 0)
14554 /* Found the end of list entry. */
14557 /* Each base address selection entry is a pair of 2 values.
14558 The first is the largest possible address, the second is
14559 the base address. Check for a base address here. */
14560 if ((range_beginning
& mask
) == mask
)
14562 /* If we found the largest possible address, then we already
14563 have the base address in range_end. */
14571 /* We have no valid base address for the ranges
14573 complaint (&symfile_complaints
,
14574 _("Invalid .debug_ranges data (no base address)"));
14578 if (range_beginning
> range_end
)
14580 /* Inverted range entries are invalid. */
14581 complaint (&symfile_complaints
,
14582 _("Invalid .debug_ranges data (inverted range)"));
14586 /* Empty range entries have no effect. */
14587 if (range_beginning
== range_end
)
14590 range_beginning
+= base
;
14593 /* A not-uncommon case of bad debug info.
14594 Don't pollute the addrmap with bad data. */
14595 if (range_beginning
+ baseaddr
== 0
14596 && !dwarf2_per_objfile
->has_section_at_zero
)
14598 complaint (&symfile_complaints
,
14599 _(".debug_ranges entry has start address of zero"
14600 " [in module %s]"), objfile_name (objfile
));
14604 callback (range_beginning
, range_end
);
14610 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14611 Return 1 if the attributes are present and valid, otherwise, return 0.
14612 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14615 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14616 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14617 struct partial_symtab
*ranges_pst
)
14619 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14620 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14621 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14622 SECT_OFF_TEXT (objfile
));
14625 CORE_ADDR high
= 0;
14628 retval
= dwarf2_ranges_process (offset
, cu
,
14629 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14631 if (ranges_pst
!= NULL
)
14636 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14637 range_beginning
+ baseaddr
);
14638 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14639 range_end
+ baseaddr
);
14640 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14644 /* FIXME: This is recording everything as a low-high
14645 segment of consecutive addresses. We should have a
14646 data structure for discontiguous block ranges
14650 low
= range_beginning
;
14656 if (range_beginning
< low
)
14657 low
= range_beginning
;
14658 if (range_end
> high
)
14666 /* If the first entry is an end-of-list marker, the range
14667 describes an empty scope, i.e. no instructions. */
14673 *high_return
= high
;
14677 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14678 definition for the return value. *LOWPC and *HIGHPC are set iff
14679 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14681 static enum pc_bounds_kind
14682 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14683 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14684 struct partial_symtab
*pst
)
14686 struct dwarf2_per_objfile
*dwarf2_per_objfile
14687 = cu
->per_cu
->dwarf2_per_objfile
;
14688 struct attribute
*attr
;
14689 struct attribute
*attr_high
;
14691 CORE_ADDR high
= 0;
14692 enum pc_bounds_kind ret
;
14694 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14697 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14700 low
= attr_value_as_address (attr
);
14701 high
= attr_value_as_address (attr_high
);
14702 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14706 /* Found high w/o low attribute. */
14707 return PC_BOUNDS_INVALID
;
14709 /* Found consecutive range of addresses. */
14710 ret
= PC_BOUNDS_HIGH_LOW
;
14714 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14717 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14718 We take advantage of the fact that DW_AT_ranges does not appear
14719 in DW_TAG_compile_unit of DWO files. */
14720 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14721 unsigned int ranges_offset
= (DW_UNSND (attr
)
14722 + (need_ranges_base
14726 /* Value of the DW_AT_ranges attribute is the offset in the
14727 .debug_ranges section. */
14728 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14729 return PC_BOUNDS_INVALID
;
14730 /* Found discontinuous range of addresses. */
14731 ret
= PC_BOUNDS_RANGES
;
14734 return PC_BOUNDS_NOT_PRESENT
;
14737 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14739 return PC_BOUNDS_INVALID
;
14741 /* When using the GNU linker, .gnu.linkonce. sections are used to
14742 eliminate duplicate copies of functions and vtables and such.
14743 The linker will arbitrarily choose one and discard the others.
14744 The AT_*_pc values for such functions refer to local labels in
14745 these sections. If the section from that file was discarded, the
14746 labels are not in the output, so the relocs get a value of 0.
14747 If this is a discarded function, mark the pc bounds as invalid,
14748 so that GDB will ignore it. */
14749 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14750 return PC_BOUNDS_INVALID
;
14758 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14759 its low and high PC addresses. Do nothing if these addresses could not
14760 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14761 and HIGHPC to the high address if greater than HIGHPC. */
14764 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14765 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14766 struct dwarf2_cu
*cu
)
14768 CORE_ADDR low
, high
;
14769 struct die_info
*child
= die
->child
;
14771 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14773 *lowpc
= std::min (*lowpc
, low
);
14774 *highpc
= std::max (*highpc
, high
);
14777 /* If the language does not allow nested subprograms (either inside
14778 subprograms or lexical blocks), we're done. */
14779 if (cu
->language
!= language_ada
)
14782 /* Check all the children of the given DIE. If it contains nested
14783 subprograms, then check their pc bounds. Likewise, we need to
14784 check lexical blocks as well, as they may also contain subprogram
14786 while (child
&& child
->tag
)
14788 if (child
->tag
== DW_TAG_subprogram
14789 || child
->tag
== DW_TAG_lexical_block
)
14790 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14791 child
= sibling_die (child
);
14795 /* Get the low and high pc's represented by the scope DIE, and store
14796 them in *LOWPC and *HIGHPC. If the correct values can't be
14797 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14800 get_scope_pc_bounds (struct die_info
*die
,
14801 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14802 struct dwarf2_cu
*cu
)
14804 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14805 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14806 CORE_ADDR current_low
, current_high
;
14808 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14809 >= PC_BOUNDS_RANGES
)
14811 best_low
= current_low
;
14812 best_high
= current_high
;
14816 struct die_info
*child
= die
->child
;
14818 while (child
&& child
->tag
)
14820 switch (child
->tag
) {
14821 case DW_TAG_subprogram
:
14822 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14824 case DW_TAG_namespace
:
14825 case DW_TAG_module
:
14826 /* FIXME: carlton/2004-01-16: Should we do this for
14827 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14828 that current GCC's always emit the DIEs corresponding
14829 to definitions of methods of classes as children of a
14830 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14831 the DIEs giving the declarations, which could be
14832 anywhere). But I don't see any reason why the
14833 standards says that they have to be there. */
14834 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14836 if (current_low
!= ((CORE_ADDR
) -1))
14838 best_low
= std::min (best_low
, current_low
);
14839 best_high
= std::max (best_high
, current_high
);
14847 child
= sibling_die (child
);
14852 *highpc
= best_high
;
14855 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14859 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14860 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14862 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14863 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14864 struct attribute
*attr
;
14865 struct attribute
*attr_high
;
14867 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14870 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14873 CORE_ADDR low
= attr_value_as_address (attr
);
14874 CORE_ADDR high
= attr_value_as_address (attr_high
);
14876 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14879 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14880 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14881 record_block_range (block
, low
, high
- 1);
14885 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14888 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14889 We take advantage of the fact that DW_AT_ranges does not appear
14890 in DW_TAG_compile_unit of DWO files. */
14891 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14893 /* The value of the DW_AT_ranges attribute is the offset of the
14894 address range list in the .debug_ranges section. */
14895 unsigned long offset
= (DW_UNSND (attr
)
14896 + (need_ranges_base
? cu
->ranges_base
: 0));
14897 const gdb_byte
*buffer
;
14899 /* For some target architectures, but not others, the
14900 read_address function sign-extends the addresses it returns.
14901 To recognize base address selection entries, we need a
14903 unsigned int addr_size
= cu
->header
.addr_size
;
14904 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14906 /* The base address, to which the next pair is relative. Note
14907 that this 'base' is a DWARF concept: most entries in a range
14908 list are relative, to reduce the number of relocs against the
14909 debugging information. This is separate from this function's
14910 'baseaddr' argument, which GDB uses to relocate debugging
14911 information from a shared library based on the address at
14912 which the library was loaded. */
14913 CORE_ADDR base
= cu
->base_address
;
14914 int base_known
= cu
->base_known
;
14916 dwarf2_ranges_process (offset
, cu
,
14917 [&] (CORE_ADDR start
, CORE_ADDR end
)
14921 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14922 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14923 record_block_range (block
, start
, end
- 1);
14928 /* Check whether the producer field indicates either of GCC < 4.6, or the
14929 Intel C/C++ compiler, and cache the result in CU. */
14932 check_producer (struct dwarf2_cu
*cu
)
14936 if (cu
->producer
== NULL
)
14938 /* For unknown compilers expect their behavior is DWARF version
14941 GCC started to support .debug_types sections by -gdwarf-4 since
14942 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14943 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14944 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14945 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14947 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14949 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14950 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14952 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14953 cu
->producer_is_icc_lt_14
= major
< 14;
14956 /* For other non-GCC compilers, expect their behavior is DWARF version
14960 cu
->checked_producer
= 1;
14963 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14964 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14965 during 4.6.0 experimental. */
14968 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14970 if (!cu
->checked_producer
)
14971 check_producer (cu
);
14973 return cu
->producer_is_gxx_lt_4_6
;
14976 /* Return the default accessibility type if it is not overriden by
14977 DW_AT_accessibility. */
14979 static enum dwarf_access_attribute
14980 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14982 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14984 /* The default DWARF 2 accessibility for members is public, the default
14985 accessibility for inheritance is private. */
14987 if (die
->tag
!= DW_TAG_inheritance
)
14988 return DW_ACCESS_public
;
14990 return DW_ACCESS_private
;
14994 /* DWARF 3+ defines the default accessibility a different way. The same
14995 rules apply now for DW_TAG_inheritance as for the members and it only
14996 depends on the container kind. */
14998 if (die
->parent
->tag
== DW_TAG_class_type
)
14999 return DW_ACCESS_private
;
15001 return DW_ACCESS_public
;
15005 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
15006 offset. If the attribute was not found return 0, otherwise return
15007 1. If it was found but could not properly be handled, set *OFFSET
15011 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
15014 struct attribute
*attr
;
15016 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
15021 /* Note that we do not check for a section offset first here.
15022 This is because DW_AT_data_member_location is new in DWARF 4,
15023 so if we see it, we can assume that a constant form is really
15024 a constant and not a section offset. */
15025 if (attr_form_is_constant (attr
))
15026 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
15027 else if (attr_form_is_section_offset (attr
))
15028 dwarf2_complex_location_expr_complaint ();
15029 else if (attr_form_is_block (attr
))
15030 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15032 dwarf2_complex_location_expr_complaint ();
15040 /* Add an aggregate field to the field list. */
15043 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15044 struct dwarf2_cu
*cu
)
15046 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15047 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15048 struct nextfield
*new_field
;
15049 struct attribute
*attr
;
15051 const char *fieldname
= "";
15053 if (die
->tag
== DW_TAG_inheritance
)
15055 fip
->baseclasses
.emplace_back ();
15056 new_field
= &fip
->baseclasses
.back ();
15060 fip
->fields
.emplace_back ();
15061 new_field
= &fip
->fields
.back ();
15066 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15068 new_field
->accessibility
= DW_UNSND (attr
);
15070 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15071 if (new_field
->accessibility
!= DW_ACCESS_public
)
15072 fip
->non_public_fields
= 1;
15074 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15076 new_field
->virtuality
= DW_UNSND (attr
);
15078 new_field
->virtuality
= DW_VIRTUALITY_none
;
15080 fp
= &new_field
->field
;
15082 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15086 /* Data member other than a C++ static data member. */
15088 /* Get type of field. */
15089 fp
->type
= die_type (die
, cu
);
15091 SET_FIELD_BITPOS (*fp
, 0);
15093 /* Get bit size of field (zero if none). */
15094 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15097 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15101 FIELD_BITSIZE (*fp
) = 0;
15104 /* Get bit offset of field. */
15105 if (handle_data_member_location (die
, cu
, &offset
))
15106 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15107 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15110 if (gdbarch_bits_big_endian (gdbarch
))
15112 /* For big endian bits, the DW_AT_bit_offset gives the
15113 additional bit offset from the MSB of the containing
15114 anonymous object to the MSB of the field. We don't
15115 have to do anything special since we don't need to
15116 know the size of the anonymous object. */
15117 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15121 /* For little endian bits, compute the bit offset to the
15122 MSB of the anonymous object, subtract off the number of
15123 bits from the MSB of the field to the MSB of the
15124 object, and then subtract off the number of bits of
15125 the field itself. The result is the bit offset of
15126 the LSB of the field. */
15127 int anonymous_size
;
15128 int bit_offset
= DW_UNSND (attr
);
15130 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15133 /* The size of the anonymous object containing
15134 the bit field is explicit, so use the
15135 indicated size (in bytes). */
15136 anonymous_size
= DW_UNSND (attr
);
15140 /* The size of the anonymous object containing
15141 the bit field must be inferred from the type
15142 attribute of the data member containing the
15144 anonymous_size
= TYPE_LENGTH (fp
->type
);
15146 SET_FIELD_BITPOS (*fp
,
15147 (FIELD_BITPOS (*fp
)
15148 + anonymous_size
* bits_per_byte
15149 - bit_offset
- FIELD_BITSIZE (*fp
)));
15152 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15154 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15155 + dwarf2_get_attr_constant_value (attr
, 0)));
15157 /* Get name of field. */
15158 fieldname
= dwarf2_name (die
, cu
);
15159 if (fieldname
== NULL
)
15162 /* The name is already allocated along with this objfile, so we don't
15163 need to duplicate it for the type. */
15164 fp
->name
= fieldname
;
15166 /* Change accessibility for artificial fields (e.g. virtual table
15167 pointer or virtual base class pointer) to private. */
15168 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15170 FIELD_ARTIFICIAL (*fp
) = 1;
15171 new_field
->accessibility
= DW_ACCESS_private
;
15172 fip
->non_public_fields
= 1;
15175 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15177 /* C++ static member. */
15179 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15180 is a declaration, but all versions of G++ as of this writing
15181 (so through at least 3.2.1) incorrectly generate
15182 DW_TAG_variable tags. */
15184 const char *physname
;
15186 /* Get name of field. */
15187 fieldname
= dwarf2_name (die
, cu
);
15188 if (fieldname
== NULL
)
15191 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15193 /* Only create a symbol if this is an external value.
15194 new_symbol checks this and puts the value in the global symbol
15195 table, which we want. If it is not external, new_symbol
15196 will try to put the value in cu->list_in_scope which is wrong. */
15197 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15199 /* A static const member, not much different than an enum as far as
15200 we're concerned, except that we can support more types. */
15201 new_symbol (die
, NULL
, cu
);
15204 /* Get physical name. */
15205 physname
= dwarf2_physname (fieldname
, die
, cu
);
15207 /* The name is already allocated along with this objfile, so we don't
15208 need to duplicate it for the type. */
15209 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15210 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15211 FIELD_NAME (*fp
) = fieldname
;
15213 else if (die
->tag
== DW_TAG_inheritance
)
15217 /* C++ base class field. */
15218 if (handle_data_member_location (die
, cu
, &offset
))
15219 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15220 FIELD_BITSIZE (*fp
) = 0;
15221 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15222 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15224 else if (die
->tag
== DW_TAG_variant_part
)
15226 /* process_structure_scope will treat this DIE as a union. */
15227 process_structure_scope (die
, cu
);
15229 /* The variant part is relative to the start of the enclosing
15231 SET_FIELD_BITPOS (*fp
, 0);
15232 fp
->type
= get_die_type (die
, cu
);
15233 fp
->artificial
= 1;
15234 fp
->name
= "<<variant>>";
15237 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15240 /* Can the type given by DIE define another type? */
15243 type_can_define_types (const struct die_info
*die
)
15247 case DW_TAG_typedef
:
15248 case DW_TAG_class_type
:
15249 case DW_TAG_structure_type
:
15250 case DW_TAG_union_type
:
15251 case DW_TAG_enumeration_type
:
15259 /* Add a type definition defined in the scope of the FIP's class. */
15262 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15263 struct dwarf2_cu
*cu
)
15265 struct decl_field fp
;
15266 memset (&fp
, 0, sizeof (fp
));
15268 gdb_assert (type_can_define_types (die
));
15270 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15271 fp
.name
= dwarf2_name (die
, cu
);
15272 fp
.type
= read_type_die (die
, cu
);
15274 /* Save accessibility. */
15275 enum dwarf_access_attribute accessibility
;
15276 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15278 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15280 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15281 switch (accessibility
)
15283 case DW_ACCESS_public
:
15284 /* The assumed value if neither private nor protected. */
15286 case DW_ACCESS_private
:
15289 case DW_ACCESS_protected
:
15290 fp
.is_protected
= 1;
15293 complaint (&symfile_complaints
,
15294 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15297 if (die
->tag
== DW_TAG_typedef
)
15298 fip
->typedef_field_list
.push_back (fp
);
15300 fip
->nested_types_list
.push_back (fp
);
15303 /* Create the vector of fields, and attach it to the type. */
15306 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15307 struct dwarf2_cu
*cu
)
15309 int nfields
= fip
->nfields
;
15311 /* Record the field count, allocate space for the array of fields,
15312 and create blank accessibility bitfields if necessary. */
15313 TYPE_NFIELDS (type
) = nfields
;
15314 TYPE_FIELDS (type
) = (struct field
*)
15315 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15317 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15319 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15321 TYPE_FIELD_PRIVATE_BITS (type
) =
15322 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15323 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15325 TYPE_FIELD_PROTECTED_BITS (type
) =
15326 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15327 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15329 TYPE_FIELD_IGNORE_BITS (type
) =
15330 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15331 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15334 /* If the type has baseclasses, allocate and clear a bit vector for
15335 TYPE_FIELD_VIRTUAL_BITS. */
15336 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15338 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15339 unsigned char *pointer
;
15341 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15342 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15343 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15344 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15345 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15348 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15350 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15352 for (int index
= 0; index
< nfields
; ++index
)
15354 struct nextfield
&field
= fip
->fields
[index
];
15356 if (field
.variant
.is_discriminant
)
15357 di
->discriminant_index
= index
;
15358 else if (field
.variant
.default_branch
)
15359 di
->default_index
= index
;
15361 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15365 /* Copy the saved-up fields into the field vector. */
15366 for (int i
= 0; i
< nfields
; ++i
)
15368 struct nextfield
&field
15369 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15370 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15372 TYPE_FIELD (type
, i
) = field
.field
;
15373 switch (field
.accessibility
)
15375 case DW_ACCESS_private
:
15376 if (cu
->language
!= language_ada
)
15377 SET_TYPE_FIELD_PRIVATE (type
, i
);
15380 case DW_ACCESS_protected
:
15381 if (cu
->language
!= language_ada
)
15382 SET_TYPE_FIELD_PROTECTED (type
, i
);
15385 case DW_ACCESS_public
:
15389 /* Unknown accessibility. Complain and treat it as public. */
15391 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15392 field
.accessibility
);
15396 if (i
< fip
->baseclasses
.size ())
15398 switch (field
.virtuality
)
15400 case DW_VIRTUALITY_virtual
:
15401 case DW_VIRTUALITY_pure_virtual
:
15402 if (cu
->language
== language_ada
)
15403 error (_("unexpected virtuality in component of Ada type"));
15404 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15411 /* Return true if this member function is a constructor, false
15415 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15417 const char *fieldname
;
15418 const char *type_name
;
15421 if (die
->parent
== NULL
)
15424 if (die
->parent
->tag
!= DW_TAG_structure_type
15425 && die
->parent
->tag
!= DW_TAG_union_type
15426 && die
->parent
->tag
!= DW_TAG_class_type
)
15429 fieldname
= dwarf2_name (die
, cu
);
15430 type_name
= dwarf2_name (die
->parent
, cu
);
15431 if (fieldname
== NULL
|| type_name
== NULL
)
15434 len
= strlen (fieldname
);
15435 return (strncmp (fieldname
, type_name
, len
) == 0
15436 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15439 /* Add a member function to the proper fieldlist. */
15442 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15443 struct type
*type
, struct dwarf2_cu
*cu
)
15445 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15446 struct attribute
*attr
;
15448 struct fnfieldlist
*flp
= nullptr;
15449 struct fn_field
*fnp
;
15450 const char *fieldname
;
15451 struct type
*this_type
;
15452 enum dwarf_access_attribute accessibility
;
15454 if (cu
->language
== language_ada
)
15455 error (_("unexpected member function in Ada type"));
15457 /* Get name of member function. */
15458 fieldname
= dwarf2_name (die
, cu
);
15459 if (fieldname
== NULL
)
15462 /* Look up member function name in fieldlist. */
15463 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15465 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15467 flp
= &fip
->fnfieldlists
[i
];
15472 /* Create a new fnfieldlist if necessary. */
15473 if (flp
== nullptr)
15475 fip
->fnfieldlists
.emplace_back ();
15476 flp
= &fip
->fnfieldlists
.back ();
15477 flp
->name
= fieldname
;
15478 i
= fip
->fnfieldlists
.size () - 1;
15481 /* Create a new member function field and add it to the vector of
15483 flp
->fnfields
.emplace_back ();
15484 fnp
= &flp
->fnfields
.back ();
15486 /* Delay processing of the physname until later. */
15487 if (cu
->language
== language_cplus
)
15488 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15492 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15493 fnp
->physname
= physname
? physname
: "";
15496 fnp
->type
= alloc_type (objfile
);
15497 this_type
= read_type_die (die
, cu
);
15498 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15500 int nparams
= TYPE_NFIELDS (this_type
);
15502 /* TYPE is the domain of this method, and THIS_TYPE is the type
15503 of the method itself (TYPE_CODE_METHOD). */
15504 smash_to_method_type (fnp
->type
, type
,
15505 TYPE_TARGET_TYPE (this_type
),
15506 TYPE_FIELDS (this_type
),
15507 TYPE_NFIELDS (this_type
),
15508 TYPE_VARARGS (this_type
));
15510 /* Handle static member functions.
15511 Dwarf2 has no clean way to discern C++ static and non-static
15512 member functions. G++ helps GDB by marking the first
15513 parameter for non-static member functions (which is the this
15514 pointer) as artificial. We obtain this information from
15515 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15516 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15517 fnp
->voffset
= VOFFSET_STATIC
;
15520 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15521 dwarf2_full_name (fieldname
, die
, cu
));
15523 /* Get fcontext from DW_AT_containing_type if present. */
15524 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15525 fnp
->fcontext
= die_containing_type (die
, cu
);
15527 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15528 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15530 /* Get accessibility. */
15531 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15533 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15535 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15536 switch (accessibility
)
15538 case DW_ACCESS_private
:
15539 fnp
->is_private
= 1;
15541 case DW_ACCESS_protected
:
15542 fnp
->is_protected
= 1;
15546 /* Check for artificial methods. */
15547 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15548 if (attr
&& DW_UNSND (attr
) != 0)
15549 fnp
->is_artificial
= 1;
15551 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15553 /* Get index in virtual function table if it is a virtual member
15554 function. For older versions of GCC, this is an offset in the
15555 appropriate virtual table, as specified by DW_AT_containing_type.
15556 For everyone else, it is an expression to be evaluated relative
15557 to the object address. */
15559 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15562 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15564 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15566 /* Old-style GCC. */
15567 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15569 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15570 || (DW_BLOCK (attr
)->size
> 1
15571 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15572 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15574 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15575 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15576 dwarf2_complex_location_expr_complaint ();
15578 fnp
->voffset
/= cu
->header
.addr_size
;
15582 dwarf2_complex_location_expr_complaint ();
15584 if (!fnp
->fcontext
)
15586 /* If there is no `this' field and no DW_AT_containing_type,
15587 we cannot actually find a base class context for the
15589 if (TYPE_NFIELDS (this_type
) == 0
15590 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15592 complaint (&symfile_complaints
,
15593 _("cannot determine context for virtual member "
15594 "function \"%s\" (offset %s)"),
15595 fieldname
, sect_offset_str (die
->sect_off
));
15600 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15604 else if (attr_form_is_section_offset (attr
))
15606 dwarf2_complex_location_expr_complaint ();
15610 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15616 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15617 if (attr
&& DW_UNSND (attr
))
15619 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15620 complaint (&symfile_complaints
,
15621 _("Member function \"%s\" (offset %s) is virtual "
15622 "but the vtable offset is not specified"),
15623 fieldname
, sect_offset_str (die
->sect_off
));
15624 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15625 TYPE_CPLUS_DYNAMIC (type
) = 1;
15630 /* Create the vector of member function fields, and attach it to the type. */
15633 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15634 struct dwarf2_cu
*cu
)
15636 if (cu
->language
== language_ada
)
15637 error (_("unexpected member functions in Ada type"));
15639 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15640 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15642 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15644 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15646 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15647 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15649 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15650 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15651 fn_flp
->fn_fields
= (struct fn_field
*)
15652 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15654 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15655 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15658 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15661 /* Returns non-zero if NAME is the name of a vtable member in CU's
15662 language, zero otherwise. */
15664 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15666 static const char vptr
[] = "_vptr";
15668 /* Look for the C++ form of the vtable. */
15669 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15675 /* GCC outputs unnamed structures that are really pointers to member
15676 functions, with the ABI-specified layout. If TYPE describes
15677 such a structure, smash it into a member function type.
15679 GCC shouldn't do this; it should just output pointer to member DIEs.
15680 This is GCC PR debug/28767. */
15683 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15685 struct type
*pfn_type
, *self_type
, *new_type
;
15687 /* Check for a structure with no name and two children. */
15688 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15691 /* Check for __pfn and __delta members. */
15692 if (TYPE_FIELD_NAME (type
, 0) == NULL
15693 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15694 || TYPE_FIELD_NAME (type
, 1) == NULL
15695 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15698 /* Find the type of the method. */
15699 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15700 if (pfn_type
== NULL
15701 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15702 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15705 /* Look for the "this" argument. */
15706 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15707 if (TYPE_NFIELDS (pfn_type
) == 0
15708 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15709 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15712 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15713 new_type
= alloc_type (objfile
);
15714 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15715 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15716 TYPE_VARARGS (pfn_type
));
15717 smash_to_methodptr_type (type
, new_type
);
15721 /* Called when we find the DIE that starts a structure or union scope
15722 (definition) to create a type for the structure or union. Fill in
15723 the type's name and general properties; the members will not be
15724 processed until process_structure_scope. A symbol table entry for
15725 the type will also not be done until process_structure_scope (assuming
15726 the type has a name).
15728 NOTE: we need to call these functions regardless of whether or not the
15729 DIE has a DW_AT_name attribute, since it might be an anonymous
15730 structure or union. This gets the type entered into our set of
15731 user defined types. */
15733 static struct type
*
15734 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15736 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15738 struct attribute
*attr
;
15741 /* If the definition of this type lives in .debug_types, read that type.
15742 Don't follow DW_AT_specification though, that will take us back up
15743 the chain and we want to go down. */
15744 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15747 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15749 /* The type's CU may not be the same as CU.
15750 Ensure TYPE is recorded with CU in die_type_hash. */
15751 return set_die_type (die
, type
, cu
);
15754 type
= alloc_type (objfile
);
15755 INIT_CPLUS_SPECIFIC (type
);
15757 name
= dwarf2_name (die
, cu
);
15760 if (cu
->language
== language_cplus
15761 || cu
->language
== language_d
15762 || cu
->language
== language_rust
)
15764 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15766 /* dwarf2_full_name might have already finished building the DIE's
15767 type. If so, there is no need to continue. */
15768 if (get_die_type (die
, cu
) != NULL
)
15769 return get_die_type (die
, cu
);
15771 TYPE_TAG_NAME (type
) = full_name
;
15772 if (die
->tag
== DW_TAG_structure_type
15773 || die
->tag
== DW_TAG_class_type
)
15774 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15778 /* The name is already allocated along with this objfile, so
15779 we don't need to duplicate it for the type. */
15780 TYPE_TAG_NAME (type
) = name
;
15781 if (die
->tag
== DW_TAG_class_type
)
15782 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15786 if (die
->tag
== DW_TAG_structure_type
)
15788 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15790 else if (die
->tag
== DW_TAG_union_type
)
15792 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15794 else if (die
->tag
== DW_TAG_variant_part
)
15796 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15797 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15801 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15804 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15805 TYPE_DECLARED_CLASS (type
) = 1;
15807 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15810 if (attr_form_is_constant (attr
))
15811 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15814 /* For the moment, dynamic type sizes are not supported
15815 by GDB's struct type. The actual size is determined
15816 on-demand when resolving the type of a given object,
15817 so set the type's length to zero for now. Otherwise,
15818 we record an expression as the length, and that expression
15819 could lead to a very large value, which could eventually
15820 lead to us trying to allocate that much memory when creating
15821 a value of that type. */
15822 TYPE_LENGTH (type
) = 0;
15827 TYPE_LENGTH (type
) = 0;
15830 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15832 /* ICC<14 does not output the required DW_AT_declaration on
15833 incomplete types, but gives them a size of zero. */
15834 TYPE_STUB (type
) = 1;
15837 TYPE_STUB_SUPPORTED (type
) = 1;
15839 if (die_is_declaration (die
, cu
))
15840 TYPE_STUB (type
) = 1;
15841 else if (attr
== NULL
&& die
->child
== NULL
15842 && producer_is_realview (cu
->producer
))
15843 /* RealView does not output the required DW_AT_declaration
15844 on incomplete types. */
15845 TYPE_STUB (type
) = 1;
15847 /* We need to add the type field to the die immediately so we don't
15848 infinitely recurse when dealing with pointers to the structure
15849 type within the structure itself. */
15850 set_die_type (die
, type
, cu
);
15852 /* set_die_type should be already done. */
15853 set_descriptive_type (type
, die
, cu
);
15858 /* A helper for process_structure_scope that handles a single member
15862 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15863 struct field_info
*fi
,
15864 std::vector
<struct symbol
*> *template_args
,
15865 struct dwarf2_cu
*cu
)
15867 if (child_die
->tag
== DW_TAG_member
15868 || child_die
->tag
== DW_TAG_variable
15869 || child_die
->tag
== DW_TAG_variant_part
)
15871 /* NOTE: carlton/2002-11-05: A C++ static data member
15872 should be a DW_TAG_member that is a declaration, but
15873 all versions of G++ as of this writing (so through at
15874 least 3.2.1) incorrectly generate DW_TAG_variable
15875 tags for them instead. */
15876 dwarf2_add_field (fi
, child_die
, cu
);
15878 else if (child_die
->tag
== DW_TAG_subprogram
)
15880 /* Rust doesn't have member functions in the C++ sense.
15881 However, it does emit ordinary functions as children
15882 of a struct DIE. */
15883 if (cu
->language
== language_rust
)
15884 read_func_scope (child_die
, cu
);
15887 /* C++ member function. */
15888 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15891 else if (child_die
->tag
== DW_TAG_inheritance
)
15893 /* C++ base class field. */
15894 dwarf2_add_field (fi
, child_die
, cu
);
15896 else if (type_can_define_types (child_die
))
15897 dwarf2_add_type_defn (fi
, child_die
, cu
);
15898 else if (child_die
->tag
== DW_TAG_template_type_param
15899 || child_die
->tag
== DW_TAG_template_value_param
)
15901 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15904 template_args
->push_back (arg
);
15906 else if (child_die
->tag
== DW_TAG_variant
)
15908 /* In a variant we want to get the discriminant and also add a
15909 field for our sole member child. */
15910 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15912 for (struct die_info
*variant_child
= child_die
->child
;
15913 variant_child
!= NULL
;
15914 variant_child
= sibling_die (variant_child
))
15916 if (variant_child
->tag
== DW_TAG_member
)
15918 handle_struct_member_die (variant_child
, type
, fi
,
15919 template_args
, cu
);
15920 /* Only handle the one. */
15925 /* We don't handle this but we might as well report it if we see
15927 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15928 complaint (&symfile_complaints
,
15929 _("DW_AT_discr_list is not supported yet"
15930 " - DIE at %s [in module %s]"),
15931 sect_offset_str (child_die
->sect_off
),
15932 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15934 /* The first field was just added, so we can stash the
15935 discriminant there. */
15936 gdb_assert (!fi
->fields
.empty ());
15938 fi
->fields
.back ().variant
.default_branch
= true;
15940 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15944 /* Finish creating a structure or union type, including filling in
15945 its members and creating a symbol for it. */
15948 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15950 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15951 struct die_info
*child_die
;
15954 type
= get_die_type (die
, cu
);
15956 type
= read_structure_type (die
, cu
);
15958 /* When reading a DW_TAG_variant_part, we need to notice when we
15959 read the discriminant member, so we can record it later in the
15960 discriminant_info. */
15961 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15962 sect_offset discr_offset
;
15964 if (is_variant_part
)
15966 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15969 /* Maybe it's a univariant form, an extension we support.
15970 In this case arrange not to check the offset. */
15971 is_variant_part
= false;
15973 else if (attr_form_is_ref (discr
))
15975 struct dwarf2_cu
*target_cu
= cu
;
15976 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15978 discr_offset
= target_die
->sect_off
;
15982 complaint (&symfile_complaints
,
15983 _("DW_AT_discr does not have DIE reference form"
15984 " - DIE at %s [in module %s]"),
15985 sect_offset_str (die
->sect_off
),
15986 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15987 is_variant_part
= false;
15991 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15993 struct field_info fi
;
15994 std::vector
<struct symbol
*> template_args
;
15996 child_die
= die
->child
;
15998 while (child_die
&& child_die
->tag
)
16000 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16002 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
16003 fi
.fields
.back ().variant
.is_discriminant
= true;
16005 child_die
= sibling_die (child_die
);
16008 /* Attach template arguments to type. */
16009 if (!template_args
.empty ())
16011 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16012 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16013 TYPE_TEMPLATE_ARGUMENTS (type
)
16014 = XOBNEWVEC (&objfile
->objfile_obstack
,
16016 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16017 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16018 template_args
.data (),
16019 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16020 * sizeof (struct symbol
*)));
16023 /* Attach fields and member functions to the type. */
16025 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16026 if (!fi
.fnfieldlists
.empty ())
16028 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16030 /* Get the type which refers to the base class (possibly this
16031 class itself) which contains the vtable pointer for the current
16032 class from the DW_AT_containing_type attribute. This use of
16033 DW_AT_containing_type is a GNU extension. */
16035 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16037 struct type
*t
= die_containing_type (die
, cu
);
16039 set_type_vptr_basetype (type
, t
);
16044 /* Our own class provides vtbl ptr. */
16045 for (i
= TYPE_NFIELDS (t
) - 1;
16046 i
>= TYPE_N_BASECLASSES (t
);
16049 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16051 if (is_vtable_name (fieldname
, cu
))
16053 set_type_vptr_fieldno (type
, i
);
16058 /* Complain if virtual function table field not found. */
16059 if (i
< TYPE_N_BASECLASSES (t
))
16060 complaint (&symfile_complaints
,
16061 _("virtual function table pointer "
16062 "not found when defining class '%s'"),
16063 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
16068 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16071 else if (cu
->producer
16072 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16074 /* The IBM XLC compiler does not provide direct indication
16075 of the containing type, but the vtable pointer is
16076 always named __vfp. */
16080 for (i
= TYPE_NFIELDS (type
) - 1;
16081 i
>= TYPE_N_BASECLASSES (type
);
16084 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16086 set_type_vptr_fieldno (type
, i
);
16087 set_type_vptr_basetype (type
, type
);
16094 /* Copy fi.typedef_field_list linked list elements content into the
16095 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16096 if (!fi
.typedef_field_list
.empty ())
16098 int count
= fi
.typedef_field_list
.size ();
16100 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16101 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16102 = ((struct decl_field
*)
16104 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16105 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16107 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16108 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16111 /* Copy fi.nested_types_list linked list elements content into the
16112 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16113 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16115 int count
= fi
.nested_types_list
.size ();
16117 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16118 TYPE_NESTED_TYPES_ARRAY (type
)
16119 = ((struct decl_field
*)
16120 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16121 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16123 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16124 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16128 quirk_gcc_member_function_pointer (type
, objfile
);
16129 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16130 cu
->rust_unions
.push_back (type
);
16132 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16133 snapshots) has been known to create a die giving a declaration
16134 for a class that has, as a child, a die giving a definition for a
16135 nested class. So we have to process our children even if the
16136 current die is a declaration. Normally, of course, a declaration
16137 won't have any children at all. */
16139 child_die
= die
->child
;
16141 while (child_die
!= NULL
&& child_die
->tag
)
16143 if (child_die
->tag
== DW_TAG_member
16144 || child_die
->tag
== DW_TAG_variable
16145 || child_die
->tag
== DW_TAG_inheritance
16146 || child_die
->tag
== DW_TAG_template_value_param
16147 || child_die
->tag
== DW_TAG_template_type_param
)
16152 process_die (child_die
, cu
);
16154 child_die
= sibling_die (child_die
);
16157 /* Do not consider external references. According to the DWARF standard,
16158 these DIEs are identified by the fact that they have no byte_size
16159 attribute, and a declaration attribute. */
16160 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16161 || !die_is_declaration (die
, cu
))
16162 new_symbol (die
, type
, cu
);
16165 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16166 update TYPE using some information only available in DIE's children. */
16169 update_enumeration_type_from_children (struct die_info
*die
,
16171 struct dwarf2_cu
*cu
)
16173 struct die_info
*child_die
;
16174 int unsigned_enum
= 1;
16178 auto_obstack obstack
;
16180 for (child_die
= die
->child
;
16181 child_die
!= NULL
&& child_die
->tag
;
16182 child_die
= sibling_die (child_die
))
16184 struct attribute
*attr
;
16186 const gdb_byte
*bytes
;
16187 struct dwarf2_locexpr_baton
*baton
;
16190 if (child_die
->tag
!= DW_TAG_enumerator
)
16193 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16197 name
= dwarf2_name (child_die
, cu
);
16199 name
= "<anonymous enumerator>";
16201 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16202 &value
, &bytes
, &baton
);
16208 else if ((mask
& value
) != 0)
16213 /* If we already know that the enum type is neither unsigned, nor
16214 a flag type, no need to look at the rest of the enumerates. */
16215 if (!unsigned_enum
&& !flag_enum
)
16220 TYPE_UNSIGNED (type
) = 1;
16222 TYPE_FLAG_ENUM (type
) = 1;
16225 /* Given a DW_AT_enumeration_type die, set its type. We do not
16226 complete the type's fields yet, or create any symbols. */
16228 static struct type
*
16229 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16231 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16233 struct attribute
*attr
;
16236 /* If the definition of this type lives in .debug_types, read that type.
16237 Don't follow DW_AT_specification though, that will take us back up
16238 the chain and we want to go down. */
16239 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16242 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16244 /* The type's CU may not be the same as CU.
16245 Ensure TYPE is recorded with CU in die_type_hash. */
16246 return set_die_type (die
, type
, cu
);
16249 type
= alloc_type (objfile
);
16251 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16252 name
= dwarf2_full_name (NULL
, die
, cu
);
16254 TYPE_TAG_NAME (type
) = name
;
16256 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16259 struct type
*underlying_type
= die_type (die
, cu
);
16261 TYPE_TARGET_TYPE (type
) = underlying_type
;
16264 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16267 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16271 TYPE_LENGTH (type
) = 0;
16274 /* The enumeration DIE can be incomplete. In Ada, any type can be
16275 declared as private in the package spec, and then defined only
16276 inside the package body. Such types are known as Taft Amendment
16277 Types. When another package uses such a type, an incomplete DIE
16278 may be generated by the compiler. */
16279 if (die_is_declaration (die
, cu
))
16280 TYPE_STUB (type
) = 1;
16282 /* Finish the creation of this type by using the enum's children.
16283 We must call this even when the underlying type has been provided
16284 so that we can determine if we're looking at a "flag" enum. */
16285 update_enumeration_type_from_children (die
, type
, cu
);
16287 /* If this type has an underlying type that is not a stub, then we
16288 may use its attributes. We always use the "unsigned" attribute
16289 in this situation, because ordinarily we guess whether the type
16290 is unsigned -- but the guess can be wrong and the underlying type
16291 can tell us the reality. However, we defer to a local size
16292 attribute if one exists, because this lets the compiler override
16293 the underlying type if needed. */
16294 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16296 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16297 if (TYPE_LENGTH (type
) == 0)
16298 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16301 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16303 return set_die_type (die
, type
, cu
);
16306 /* Given a pointer to a die which begins an enumeration, process all
16307 the dies that define the members of the enumeration, and create the
16308 symbol for the enumeration type.
16310 NOTE: We reverse the order of the element list. */
16313 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16315 struct type
*this_type
;
16317 this_type
= get_die_type (die
, cu
);
16318 if (this_type
== NULL
)
16319 this_type
= read_enumeration_type (die
, cu
);
16321 if (die
->child
!= NULL
)
16323 struct die_info
*child_die
;
16324 struct symbol
*sym
;
16325 struct field
*fields
= NULL
;
16326 int num_fields
= 0;
16329 child_die
= die
->child
;
16330 while (child_die
&& child_die
->tag
)
16332 if (child_die
->tag
!= DW_TAG_enumerator
)
16334 process_die (child_die
, cu
);
16338 name
= dwarf2_name (child_die
, cu
);
16341 sym
= new_symbol (child_die
, this_type
, cu
);
16343 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16345 fields
= (struct field
*)
16347 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16348 * sizeof (struct field
));
16351 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16352 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16353 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16354 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16360 child_die
= sibling_die (child_die
);
16365 TYPE_NFIELDS (this_type
) = num_fields
;
16366 TYPE_FIELDS (this_type
) = (struct field
*)
16367 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16368 memcpy (TYPE_FIELDS (this_type
), fields
,
16369 sizeof (struct field
) * num_fields
);
16374 /* If we are reading an enum from a .debug_types unit, and the enum
16375 is a declaration, and the enum is not the signatured type in the
16376 unit, then we do not want to add a symbol for it. Adding a
16377 symbol would in some cases obscure the true definition of the
16378 enum, giving users an incomplete type when the definition is
16379 actually available. Note that we do not want to do this for all
16380 enums which are just declarations, because C++0x allows forward
16381 enum declarations. */
16382 if (cu
->per_cu
->is_debug_types
16383 && die_is_declaration (die
, cu
))
16385 struct signatured_type
*sig_type
;
16387 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16388 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16389 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16393 new_symbol (die
, this_type
, cu
);
16396 /* Extract all information from a DW_TAG_array_type DIE and put it in
16397 the DIE's type field. For now, this only handles one dimensional
16400 static struct type
*
16401 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16403 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16404 struct die_info
*child_die
;
16406 struct type
*element_type
, *range_type
, *index_type
;
16407 struct attribute
*attr
;
16409 struct dynamic_prop
*byte_stride_prop
= NULL
;
16410 unsigned int bit_stride
= 0;
16412 element_type
= die_type (die
, cu
);
16414 /* The die_type call above may have already set the type for this DIE. */
16415 type
= get_die_type (die
, cu
);
16419 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16425 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16426 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16429 complaint (&symfile_complaints
,
16430 _("unable to read array DW_AT_byte_stride "
16431 " - DIE at %s [in module %s]"),
16432 sect_offset_str (die
->sect_off
),
16433 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16434 /* Ignore this attribute. We will likely not be able to print
16435 arrays of this type correctly, but there is little we can do
16436 to help if we cannot read the attribute's value. */
16437 byte_stride_prop
= NULL
;
16441 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16443 bit_stride
= DW_UNSND (attr
);
16445 /* Irix 6.2 native cc creates array types without children for
16446 arrays with unspecified length. */
16447 if (die
->child
== NULL
)
16449 index_type
= objfile_type (objfile
)->builtin_int
;
16450 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16451 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16452 byte_stride_prop
, bit_stride
);
16453 return set_die_type (die
, type
, cu
);
16456 std::vector
<struct type
*> range_types
;
16457 child_die
= die
->child
;
16458 while (child_die
&& child_die
->tag
)
16460 if (child_die
->tag
== DW_TAG_subrange_type
)
16462 struct type
*child_type
= read_type_die (child_die
, cu
);
16464 if (child_type
!= NULL
)
16466 /* The range type was succesfully read. Save it for the
16467 array type creation. */
16468 range_types
.push_back (child_type
);
16471 child_die
= sibling_die (child_die
);
16474 /* Dwarf2 dimensions are output from left to right, create the
16475 necessary array types in backwards order. */
16477 type
= element_type
;
16479 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16483 while (i
< range_types
.size ())
16484 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16485 byte_stride_prop
, bit_stride
);
16489 size_t ndim
= range_types
.size ();
16491 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16492 byte_stride_prop
, bit_stride
);
16495 /* Understand Dwarf2 support for vector types (like they occur on
16496 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16497 array type. This is not part of the Dwarf2/3 standard yet, but a
16498 custom vendor extension. The main difference between a regular
16499 array and the vector variant is that vectors are passed by value
16501 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16503 make_vector_type (type
);
16505 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16506 implementation may choose to implement triple vectors using this
16508 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16511 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16512 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16514 complaint (&symfile_complaints
,
16515 _("DW_AT_byte_size for array type smaller "
16516 "than the total size of elements"));
16519 name
= dwarf2_name (die
, cu
);
16521 TYPE_NAME (type
) = name
;
16523 /* Install the type in the die. */
16524 set_die_type (die
, type
, cu
);
16526 /* set_die_type should be already done. */
16527 set_descriptive_type (type
, die
, cu
);
16532 static enum dwarf_array_dim_ordering
16533 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16535 struct attribute
*attr
;
16537 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16540 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16542 /* GNU F77 is a special case, as at 08/2004 array type info is the
16543 opposite order to the dwarf2 specification, but data is still
16544 laid out as per normal fortran.
16546 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16547 version checking. */
16549 if (cu
->language
== language_fortran
16550 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16552 return DW_ORD_row_major
;
16555 switch (cu
->language_defn
->la_array_ordering
)
16557 case array_column_major
:
16558 return DW_ORD_col_major
;
16559 case array_row_major
:
16561 return DW_ORD_row_major
;
16565 /* Extract all information from a DW_TAG_set_type DIE and put it in
16566 the DIE's type field. */
16568 static struct type
*
16569 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16571 struct type
*domain_type
, *set_type
;
16572 struct attribute
*attr
;
16574 domain_type
= die_type (die
, cu
);
16576 /* The die_type call above may have already set the type for this DIE. */
16577 set_type
= get_die_type (die
, cu
);
16581 set_type
= create_set_type (NULL
, domain_type
);
16583 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16585 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16587 return set_die_type (die
, set_type
, cu
);
16590 /* A helper for read_common_block that creates a locexpr baton.
16591 SYM is the symbol which we are marking as computed.
16592 COMMON_DIE is the DIE for the common block.
16593 COMMON_LOC is the location expression attribute for the common
16595 MEMBER_LOC is the location expression attribute for the particular
16596 member of the common block that we are processing.
16597 CU is the CU from which the above come. */
16600 mark_common_block_symbol_computed (struct symbol
*sym
,
16601 struct die_info
*common_die
,
16602 struct attribute
*common_loc
,
16603 struct attribute
*member_loc
,
16604 struct dwarf2_cu
*cu
)
16606 struct dwarf2_per_objfile
*dwarf2_per_objfile
16607 = cu
->per_cu
->dwarf2_per_objfile
;
16608 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16609 struct dwarf2_locexpr_baton
*baton
;
16611 unsigned int cu_off
;
16612 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16613 LONGEST offset
= 0;
16615 gdb_assert (common_loc
&& member_loc
);
16616 gdb_assert (attr_form_is_block (common_loc
));
16617 gdb_assert (attr_form_is_block (member_loc
)
16618 || attr_form_is_constant (member_loc
));
16620 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16621 baton
->per_cu
= cu
->per_cu
;
16622 gdb_assert (baton
->per_cu
);
16624 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16626 if (attr_form_is_constant (member_loc
))
16628 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16629 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16632 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16634 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16637 *ptr
++ = DW_OP_call4
;
16638 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16639 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16642 if (attr_form_is_constant (member_loc
))
16644 *ptr
++ = DW_OP_addr
;
16645 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16646 ptr
+= cu
->header
.addr_size
;
16650 /* We have to copy the data here, because DW_OP_call4 will only
16651 use a DW_AT_location attribute. */
16652 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16653 ptr
+= DW_BLOCK (member_loc
)->size
;
16656 *ptr
++ = DW_OP_plus
;
16657 gdb_assert (ptr
- baton
->data
== baton
->size
);
16659 SYMBOL_LOCATION_BATON (sym
) = baton
;
16660 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16663 /* Create appropriate locally-scoped variables for all the
16664 DW_TAG_common_block entries. Also create a struct common_block
16665 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16666 is used to sepate the common blocks name namespace from regular
16670 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16672 struct attribute
*attr
;
16674 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16677 /* Support the .debug_loc offsets. */
16678 if (attr_form_is_block (attr
))
16682 else if (attr_form_is_section_offset (attr
))
16684 dwarf2_complex_location_expr_complaint ();
16689 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16690 "common block member");
16695 if (die
->child
!= NULL
)
16697 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16698 struct die_info
*child_die
;
16699 size_t n_entries
= 0, size
;
16700 struct common_block
*common_block
;
16701 struct symbol
*sym
;
16703 for (child_die
= die
->child
;
16704 child_die
&& child_die
->tag
;
16705 child_die
= sibling_die (child_die
))
16708 size
= (sizeof (struct common_block
)
16709 + (n_entries
- 1) * sizeof (struct symbol
*));
16711 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16713 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16714 common_block
->n_entries
= 0;
16716 for (child_die
= die
->child
;
16717 child_die
&& child_die
->tag
;
16718 child_die
= sibling_die (child_die
))
16720 /* Create the symbol in the DW_TAG_common_block block in the current
16722 sym
= new_symbol (child_die
, NULL
, cu
);
16725 struct attribute
*member_loc
;
16727 common_block
->contents
[common_block
->n_entries
++] = sym
;
16729 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16733 /* GDB has handled this for a long time, but it is
16734 not specified by DWARF. It seems to have been
16735 emitted by gfortran at least as recently as:
16736 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16737 complaint (&symfile_complaints
,
16738 _("Variable in common block has "
16739 "DW_AT_data_member_location "
16740 "- DIE at %s [in module %s]"),
16741 sect_offset_str (child_die
->sect_off
),
16742 objfile_name (objfile
));
16744 if (attr_form_is_section_offset (member_loc
))
16745 dwarf2_complex_location_expr_complaint ();
16746 else if (attr_form_is_constant (member_loc
)
16747 || attr_form_is_block (member_loc
))
16750 mark_common_block_symbol_computed (sym
, die
, attr
,
16754 dwarf2_complex_location_expr_complaint ();
16759 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16760 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16764 /* Create a type for a C++ namespace. */
16766 static struct type
*
16767 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16769 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16770 const char *previous_prefix
, *name
;
16774 /* For extensions, reuse the type of the original namespace. */
16775 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16777 struct die_info
*ext_die
;
16778 struct dwarf2_cu
*ext_cu
= cu
;
16780 ext_die
= dwarf2_extension (die
, &ext_cu
);
16781 type
= read_type_die (ext_die
, ext_cu
);
16783 /* EXT_CU may not be the same as CU.
16784 Ensure TYPE is recorded with CU in die_type_hash. */
16785 return set_die_type (die
, type
, cu
);
16788 name
= namespace_name (die
, &is_anonymous
, cu
);
16790 /* Now build the name of the current namespace. */
16792 previous_prefix
= determine_prefix (die
, cu
);
16793 if (previous_prefix
[0] != '\0')
16794 name
= typename_concat (&objfile
->objfile_obstack
,
16795 previous_prefix
, name
, 0, cu
);
16797 /* Create the type. */
16798 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16799 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16801 return set_die_type (die
, type
, cu
);
16804 /* Read a namespace scope. */
16807 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16809 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16812 /* Add a symbol associated to this if we haven't seen the namespace
16813 before. Also, add a using directive if it's an anonymous
16816 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16820 type
= read_type_die (die
, cu
);
16821 new_symbol (die
, type
, cu
);
16823 namespace_name (die
, &is_anonymous
, cu
);
16826 const char *previous_prefix
= determine_prefix (die
, cu
);
16828 std::vector
<const char *> excludes
;
16829 add_using_directive (using_directives (cu
->language
),
16830 previous_prefix
, TYPE_NAME (type
), NULL
,
16831 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16835 if (die
->child
!= NULL
)
16837 struct die_info
*child_die
= die
->child
;
16839 while (child_die
&& child_die
->tag
)
16841 process_die (child_die
, cu
);
16842 child_die
= sibling_die (child_die
);
16847 /* Read a Fortran module as type. This DIE can be only a declaration used for
16848 imported module. Still we need that type as local Fortran "use ... only"
16849 declaration imports depend on the created type in determine_prefix. */
16851 static struct type
*
16852 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16854 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16855 const char *module_name
;
16858 module_name
= dwarf2_name (die
, cu
);
16860 complaint (&symfile_complaints
,
16861 _("DW_TAG_module has no name, offset %s"),
16862 sect_offset_str (die
->sect_off
));
16863 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16865 /* determine_prefix uses TYPE_TAG_NAME. */
16866 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16868 return set_die_type (die
, type
, cu
);
16871 /* Read a Fortran module. */
16874 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16876 struct die_info
*child_die
= die
->child
;
16879 type
= read_type_die (die
, cu
);
16880 new_symbol (die
, type
, cu
);
16882 while (child_die
&& child_die
->tag
)
16884 process_die (child_die
, cu
);
16885 child_die
= sibling_die (child_die
);
16889 /* Return the name of the namespace represented by DIE. Set
16890 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16893 static const char *
16894 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16896 struct die_info
*current_die
;
16897 const char *name
= NULL
;
16899 /* Loop through the extensions until we find a name. */
16901 for (current_die
= die
;
16902 current_die
!= NULL
;
16903 current_die
= dwarf2_extension (die
, &cu
))
16905 /* We don't use dwarf2_name here so that we can detect the absence
16906 of a name -> anonymous namespace. */
16907 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16913 /* Is it an anonymous namespace? */
16915 *is_anonymous
= (name
== NULL
);
16917 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16922 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16923 the user defined type vector. */
16925 static struct type
*
16926 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16928 struct gdbarch
*gdbarch
16929 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16930 struct comp_unit_head
*cu_header
= &cu
->header
;
16932 struct attribute
*attr_byte_size
;
16933 struct attribute
*attr_address_class
;
16934 int byte_size
, addr_class
;
16935 struct type
*target_type
;
16937 target_type
= die_type (die
, cu
);
16939 /* The die_type call above may have already set the type for this DIE. */
16940 type
= get_die_type (die
, cu
);
16944 type
= lookup_pointer_type (target_type
);
16946 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16947 if (attr_byte_size
)
16948 byte_size
= DW_UNSND (attr_byte_size
);
16950 byte_size
= cu_header
->addr_size
;
16952 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16953 if (attr_address_class
)
16954 addr_class
= DW_UNSND (attr_address_class
);
16956 addr_class
= DW_ADDR_none
;
16958 /* If the pointer size or address class is different than the
16959 default, create a type variant marked as such and set the
16960 length accordingly. */
16961 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
16963 if (gdbarch_address_class_type_flags_p (gdbarch
))
16967 type_flags
= gdbarch_address_class_type_flags
16968 (gdbarch
, byte_size
, addr_class
);
16969 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16971 type
= make_type_with_address_space (type
, type_flags
);
16973 else if (TYPE_LENGTH (type
) != byte_size
)
16975 complaint (&symfile_complaints
,
16976 _("invalid pointer size %d"), byte_size
);
16980 /* Should we also complain about unhandled address classes? */
16984 TYPE_LENGTH (type
) = byte_size
;
16985 return set_die_type (die
, type
, cu
);
16988 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16989 the user defined type vector. */
16991 static struct type
*
16992 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16995 struct type
*to_type
;
16996 struct type
*domain
;
16998 to_type
= die_type (die
, cu
);
16999 domain
= die_containing_type (die
, cu
);
17001 /* The calls above may have already set the type for this DIE. */
17002 type
= get_die_type (die
, cu
);
17006 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17007 type
= lookup_methodptr_type (to_type
);
17008 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17010 struct type
*new_type
17011 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17013 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17014 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17015 TYPE_VARARGS (to_type
));
17016 type
= lookup_methodptr_type (new_type
);
17019 type
= lookup_memberptr_type (to_type
, domain
);
17021 return set_die_type (die
, type
, cu
);
17024 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17025 the user defined type vector. */
17027 static struct type
*
17028 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17029 enum type_code refcode
)
17031 struct comp_unit_head
*cu_header
= &cu
->header
;
17032 struct type
*type
, *target_type
;
17033 struct attribute
*attr
;
17035 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17037 target_type
= die_type (die
, cu
);
17039 /* The die_type call above may have already set the type for this DIE. */
17040 type
= get_die_type (die
, cu
);
17044 type
= lookup_reference_type (target_type
, refcode
);
17045 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17048 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17052 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17054 return set_die_type (die
, type
, cu
);
17057 /* Add the given cv-qualifiers to the element type of the array. GCC
17058 outputs DWARF type qualifiers that apply to an array, not the
17059 element type. But GDB relies on the array element type to carry
17060 the cv-qualifiers. This mimics section 6.7.3 of the C99
17063 static struct type
*
17064 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17065 struct type
*base_type
, int cnst
, int voltl
)
17067 struct type
*el_type
, *inner_array
;
17069 base_type
= copy_type (base_type
);
17070 inner_array
= base_type
;
17072 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17074 TYPE_TARGET_TYPE (inner_array
) =
17075 copy_type (TYPE_TARGET_TYPE (inner_array
));
17076 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17079 el_type
= TYPE_TARGET_TYPE (inner_array
);
17080 cnst
|= TYPE_CONST (el_type
);
17081 voltl
|= TYPE_VOLATILE (el_type
);
17082 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17084 return set_die_type (die
, base_type
, cu
);
17087 static struct type
*
17088 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17090 struct type
*base_type
, *cv_type
;
17092 base_type
= die_type (die
, cu
);
17094 /* The die_type call above may have already set the type for this DIE. */
17095 cv_type
= get_die_type (die
, cu
);
17099 /* In case the const qualifier is applied to an array type, the element type
17100 is so qualified, not the array type (section 6.7.3 of C99). */
17101 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17102 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17104 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17105 return set_die_type (die
, cv_type
, cu
);
17108 static struct type
*
17109 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17111 struct type
*base_type
, *cv_type
;
17113 base_type
= die_type (die
, cu
);
17115 /* The die_type call above may have already set the type for this DIE. */
17116 cv_type
= get_die_type (die
, cu
);
17120 /* In case the volatile qualifier is applied to an array type, the
17121 element type is so qualified, not the array type (section 6.7.3
17123 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17124 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17126 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17127 return set_die_type (die
, cv_type
, cu
);
17130 /* Handle DW_TAG_restrict_type. */
17132 static struct type
*
17133 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17135 struct type
*base_type
, *cv_type
;
17137 base_type
= die_type (die
, cu
);
17139 /* The die_type call above may have already set the type for this DIE. */
17140 cv_type
= get_die_type (die
, cu
);
17144 cv_type
= make_restrict_type (base_type
);
17145 return set_die_type (die
, cv_type
, cu
);
17148 /* Handle DW_TAG_atomic_type. */
17150 static struct type
*
17151 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17153 struct type
*base_type
, *cv_type
;
17155 base_type
= die_type (die
, cu
);
17157 /* The die_type call above may have already set the type for this DIE. */
17158 cv_type
= get_die_type (die
, cu
);
17162 cv_type
= make_atomic_type (base_type
);
17163 return set_die_type (die
, cv_type
, cu
);
17166 /* Extract all information from a DW_TAG_string_type DIE and add to
17167 the user defined type vector. It isn't really a user defined type,
17168 but it behaves like one, with other DIE's using an AT_user_def_type
17169 attribute to reference it. */
17171 static struct type
*
17172 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17174 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17175 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17176 struct type
*type
, *range_type
, *index_type
, *char_type
;
17177 struct attribute
*attr
;
17178 unsigned int length
;
17180 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17183 length
= DW_UNSND (attr
);
17187 /* Check for the DW_AT_byte_size attribute. */
17188 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17191 length
= DW_UNSND (attr
);
17199 index_type
= objfile_type (objfile
)->builtin_int
;
17200 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17201 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17202 type
= create_string_type (NULL
, char_type
, range_type
);
17204 return set_die_type (die
, type
, cu
);
17207 /* Assuming that DIE corresponds to a function, returns nonzero
17208 if the function is prototyped. */
17211 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17213 struct attribute
*attr
;
17215 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17216 if (attr
&& (DW_UNSND (attr
) != 0))
17219 /* The DWARF standard implies that the DW_AT_prototyped attribute
17220 is only meaninful for C, but the concept also extends to other
17221 languages that allow unprototyped functions (Eg: Objective C).
17222 For all other languages, assume that functions are always
17224 if (cu
->language
!= language_c
17225 && cu
->language
!= language_objc
17226 && cu
->language
!= language_opencl
)
17229 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17230 prototyped and unprototyped functions; default to prototyped,
17231 since that is more common in modern code (and RealView warns
17232 about unprototyped functions). */
17233 if (producer_is_realview (cu
->producer
))
17239 /* Handle DIES due to C code like:
17243 int (*funcp)(int a, long l);
17247 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17249 static struct type
*
17250 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17252 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17253 struct type
*type
; /* Type that this function returns. */
17254 struct type
*ftype
; /* Function that returns above type. */
17255 struct attribute
*attr
;
17257 type
= die_type (die
, cu
);
17259 /* The die_type call above may have already set the type for this DIE. */
17260 ftype
= get_die_type (die
, cu
);
17264 ftype
= lookup_function_type (type
);
17266 if (prototyped_function_p (die
, cu
))
17267 TYPE_PROTOTYPED (ftype
) = 1;
17269 /* Store the calling convention in the type if it's available in
17270 the subroutine die. Otherwise set the calling convention to
17271 the default value DW_CC_normal. */
17272 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17274 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17275 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17276 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17278 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17280 /* Record whether the function returns normally to its caller or not
17281 if the DWARF producer set that information. */
17282 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17283 if (attr
&& (DW_UNSND (attr
) != 0))
17284 TYPE_NO_RETURN (ftype
) = 1;
17286 /* We need to add the subroutine type to the die immediately so
17287 we don't infinitely recurse when dealing with parameters
17288 declared as the same subroutine type. */
17289 set_die_type (die
, ftype
, cu
);
17291 if (die
->child
!= NULL
)
17293 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17294 struct die_info
*child_die
;
17295 int nparams
, iparams
;
17297 /* Count the number of parameters.
17298 FIXME: GDB currently ignores vararg functions, but knows about
17299 vararg member functions. */
17301 child_die
= die
->child
;
17302 while (child_die
&& child_die
->tag
)
17304 if (child_die
->tag
== DW_TAG_formal_parameter
)
17306 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17307 TYPE_VARARGS (ftype
) = 1;
17308 child_die
= sibling_die (child_die
);
17311 /* Allocate storage for parameters and fill them in. */
17312 TYPE_NFIELDS (ftype
) = nparams
;
17313 TYPE_FIELDS (ftype
) = (struct field
*)
17314 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17316 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17317 even if we error out during the parameters reading below. */
17318 for (iparams
= 0; iparams
< nparams
; iparams
++)
17319 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17322 child_die
= die
->child
;
17323 while (child_die
&& child_die
->tag
)
17325 if (child_die
->tag
== DW_TAG_formal_parameter
)
17327 struct type
*arg_type
;
17329 /* DWARF version 2 has no clean way to discern C++
17330 static and non-static member functions. G++ helps
17331 GDB by marking the first parameter for non-static
17332 member functions (which is the this pointer) as
17333 artificial. We pass this information to
17334 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17336 DWARF version 3 added DW_AT_object_pointer, which GCC
17337 4.5 does not yet generate. */
17338 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17340 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17342 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17343 arg_type
= die_type (child_die
, cu
);
17345 /* RealView does not mark THIS as const, which the testsuite
17346 expects. GCC marks THIS as const in method definitions,
17347 but not in the class specifications (GCC PR 43053). */
17348 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17349 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17352 struct dwarf2_cu
*arg_cu
= cu
;
17353 const char *name
= dwarf2_name (child_die
, cu
);
17355 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17358 /* If the compiler emits this, use it. */
17359 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17362 else if (name
&& strcmp (name
, "this") == 0)
17363 /* Function definitions will have the argument names. */
17365 else if (name
== NULL
&& iparams
== 0)
17366 /* Declarations may not have the names, so like
17367 elsewhere in GDB, assume an artificial first
17368 argument is "this". */
17372 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17376 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17379 child_die
= sibling_die (child_die
);
17386 static struct type
*
17387 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17389 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17390 const char *name
= NULL
;
17391 struct type
*this_type
, *target_type
;
17393 name
= dwarf2_full_name (NULL
, die
, cu
);
17394 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17395 TYPE_TARGET_STUB (this_type
) = 1;
17396 set_die_type (die
, this_type
, cu
);
17397 target_type
= die_type (die
, cu
);
17398 if (target_type
!= this_type
)
17399 TYPE_TARGET_TYPE (this_type
) = target_type
;
17402 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17403 spec and cause infinite loops in GDB. */
17404 complaint (&symfile_complaints
,
17405 _("Self-referential DW_TAG_typedef "
17406 "- DIE at %s [in module %s]"),
17407 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17408 TYPE_TARGET_TYPE (this_type
) = NULL
;
17413 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17414 (which may be different from NAME) to the architecture back-end to allow
17415 it to guess the correct format if necessary. */
17417 static struct type
*
17418 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17419 const char *name_hint
)
17421 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17422 const struct floatformat
**format
;
17425 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17427 type
= init_float_type (objfile
, bits
, name
, format
);
17429 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17434 /* Find a representation of a given base type and install
17435 it in the TYPE field of the die. */
17437 static struct type
*
17438 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17440 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17442 struct attribute
*attr
;
17443 int encoding
= 0, bits
= 0;
17446 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17449 encoding
= DW_UNSND (attr
);
17451 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17454 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17456 name
= dwarf2_name (die
, cu
);
17459 complaint (&symfile_complaints
,
17460 _("DW_AT_name missing from DW_TAG_base_type"));
17465 case DW_ATE_address
:
17466 /* Turn DW_ATE_address into a void * pointer. */
17467 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17468 type
= init_pointer_type (objfile
, bits
, name
, type
);
17470 case DW_ATE_boolean
:
17471 type
= init_boolean_type (objfile
, bits
, 1, name
);
17473 case DW_ATE_complex_float
:
17474 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17475 type
= init_complex_type (objfile
, name
, type
);
17477 case DW_ATE_decimal_float
:
17478 type
= init_decfloat_type (objfile
, bits
, name
);
17481 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17483 case DW_ATE_signed
:
17484 type
= init_integer_type (objfile
, bits
, 0, name
);
17486 case DW_ATE_unsigned
:
17487 if (cu
->language
== language_fortran
17489 && startswith (name
, "character("))
17490 type
= init_character_type (objfile
, bits
, 1, name
);
17492 type
= init_integer_type (objfile
, bits
, 1, name
);
17494 case DW_ATE_signed_char
:
17495 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17496 || cu
->language
== language_pascal
17497 || cu
->language
== language_fortran
)
17498 type
= init_character_type (objfile
, bits
, 0, name
);
17500 type
= init_integer_type (objfile
, bits
, 0, name
);
17502 case DW_ATE_unsigned_char
:
17503 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17504 || cu
->language
== language_pascal
17505 || cu
->language
== language_fortran
17506 || cu
->language
== language_rust
)
17507 type
= init_character_type (objfile
, bits
, 1, name
);
17509 type
= init_integer_type (objfile
, bits
, 1, name
);
17513 gdbarch
*arch
= get_objfile_arch (objfile
);
17516 type
= builtin_type (arch
)->builtin_char16
;
17517 else if (bits
== 32)
17518 type
= builtin_type (arch
)->builtin_char32
;
17521 complaint (&symfile_complaints
,
17522 _("unsupported DW_ATE_UTF bit size: '%d'"),
17524 type
= init_integer_type (objfile
, bits
, 1, name
);
17526 return set_die_type (die
, type
, cu
);
17531 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17532 dwarf_type_encoding_name (encoding
));
17533 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17537 if (name
&& strcmp (name
, "char") == 0)
17538 TYPE_NOSIGN (type
) = 1;
17540 return set_die_type (die
, type
, cu
);
17543 /* Parse dwarf attribute if it's a block, reference or constant and put the
17544 resulting value of the attribute into struct bound_prop.
17545 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17548 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17549 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17551 struct dwarf2_property_baton
*baton
;
17552 struct obstack
*obstack
17553 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17555 if (attr
== NULL
|| prop
== NULL
)
17558 if (attr_form_is_block (attr
))
17560 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17561 baton
->referenced_type
= NULL
;
17562 baton
->locexpr
.per_cu
= cu
->per_cu
;
17563 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17564 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17565 prop
->data
.baton
= baton
;
17566 prop
->kind
= PROP_LOCEXPR
;
17567 gdb_assert (prop
->data
.baton
!= NULL
);
17569 else if (attr_form_is_ref (attr
))
17571 struct dwarf2_cu
*target_cu
= cu
;
17572 struct die_info
*target_die
;
17573 struct attribute
*target_attr
;
17575 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17576 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17577 if (target_attr
== NULL
)
17578 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17580 if (target_attr
== NULL
)
17583 switch (target_attr
->name
)
17585 case DW_AT_location
:
17586 if (attr_form_is_section_offset (target_attr
))
17588 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17589 baton
->referenced_type
= die_type (target_die
, target_cu
);
17590 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17591 prop
->data
.baton
= baton
;
17592 prop
->kind
= PROP_LOCLIST
;
17593 gdb_assert (prop
->data
.baton
!= NULL
);
17595 else if (attr_form_is_block (target_attr
))
17597 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17598 baton
->referenced_type
= die_type (target_die
, target_cu
);
17599 baton
->locexpr
.per_cu
= cu
->per_cu
;
17600 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17601 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17602 prop
->data
.baton
= baton
;
17603 prop
->kind
= PROP_LOCEXPR
;
17604 gdb_assert (prop
->data
.baton
!= NULL
);
17608 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17609 "dynamic property");
17613 case DW_AT_data_member_location
:
17617 if (!handle_data_member_location (target_die
, target_cu
,
17621 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17622 baton
->referenced_type
= read_type_die (target_die
->parent
,
17624 baton
->offset_info
.offset
= offset
;
17625 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17626 prop
->data
.baton
= baton
;
17627 prop
->kind
= PROP_ADDR_OFFSET
;
17632 else if (attr_form_is_constant (attr
))
17634 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17635 prop
->kind
= PROP_CONST
;
17639 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17640 dwarf2_name (die
, cu
));
17647 /* Read the given DW_AT_subrange DIE. */
17649 static struct type
*
17650 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17652 struct type
*base_type
, *orig_base_type
;
17653 struct type
*range_type
;
17654 struct attribute
*attr
;
17655 struct dynamic_prop low
, high
;
17656 int low_default_is_valid
;
17657 int high_bound_is_count
= 0;
17659 LONGEST negative_mask
;
17661 orig_base_type
= die_type (die
, cu
);
17662 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17663 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17664 creating the range type, but we use the result of check_typedef
17665 when examining properties of the type. */
17666 base_type
= check_typedef (orig_base_type
);
17668 /* The die_type call above may have already set the type for this DIE. */
17669 range_type
= get_die_type (die
, cu
);
17673 low
.kind
= PROP_CONST
;
17674 high
.kind
= PROP_CONST
;
17675 high
.data
.const_val
= 0;
17677 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17678 omitting DW_AT_lower_bound. */
17679 switch (cu
->language
)
17682 case language_cplus
:
17683 low
.data
.const_val
= 0;
17684 low_default_is_valid
= 1;
17686 case language_fortran
:
17687 low
.data
.const_val
= 1;
17688 low_default_is_valid
= 1;
17691 case language_objc
:
17692 case language_rust
:
17693 low
.data
.const_val
= 0;
17694 low_default_is_valid
= (cu
->header
.version
>= 4);
17698 case language_pascal
:
17699 low
.data
.const_val
= 1;
17700 low_default_is_valid
= (cu
->header
.version
>= 4);
17703 low
.data
.const_val
= 0;
17704 low_default_is_valid
= 0;
17708 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17710 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17711 else if (!low_default_is_valid
)
17712 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17713 "- DIE at %s [in module %s]"),
17714 sect_offset_str (die
->sect_off
),
17715 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17717 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17718 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17720 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17721 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17723 /* If bounds are constant do the final calculation here. */
17724 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17725 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17727 high_bound_is_count
= 1;
17731 /* Dwarf-2 specifications explicitly allows to create subrange types
17732 without specifying a base type.
17733 In that case, the base type must be set to the type of
17734 the lower bound, upper bound or count, in that order, if any of these
17735 three attributes references an object that has a type.
17736 If no base type is found, the Dwarf-2 specifications say that
17737 a signed integer type of size equal to the size of an address should
17739 For the following C code: `extern char gdb_int [];'
17740 GCC produces an empty range DIE.
17741 FIXME: muller/2010-05-28: Possible references to object for low bound,
17742 high bound or count are not yet handled by this code. */
17743 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17745 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17746 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17747 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17748 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17750 /* Test "int", "long int", and "long long int" objfile types,
17751 and select the first one having a size above or equal to the
17752 architecture address size. */
17753 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17754 base_type
= int_type
;
17757 int_type
= objfile_type (objfile
)->builtin_long
;
17758 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17759 base_type
= int_type
;
17762 int_type
= objfile_type (objfile
)->builtin_long_long
;
17763 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17764 base_type
= int_type
;
17769 /* Normally, the DWARF producers are expected to use a signed
17770 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17771 But this is unfortunately not always the case, as witnessed
17772 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17773 is used instead. To work around that ambiguity, we treat
17774 the bounds as signed, and thus sign-extend their values, when
17775 the base type is signed. */
17777 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17778 if (low
.kind
== PROP_CONST
17779 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17780 low
.data
.const_val
|= negative_mask
;
17781 if (high
.kind
== PROP_CONST
17782 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17783 high
.data
.const_val
|= negative_mask
;
17785 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17787 if (high_bound_is_count
)
17788 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17790 /* Ada expects an empty array on no boundary attributes. */
17791 if (attr
== NULL
&& cu
->language
!= language_ada
)
17792 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17794 name
= dwarf2_name (die
, cu
);
17796 TYPE_NAME (range_type
) = name
;
17798 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17800 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17802 set_die_type (die
, range_type
, cu
);
17804 /* set_die_type should be already done. */
17805 set_descriptive_type (range_type
, die
, cu
);
17810 static struct type
*
17811 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17815 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17817 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17819 /* In Ada, an unspecified type is typically used when the description
17820 of the type is defered to a different unit. When encountering
17821 such a type, we treat it as a stub, and try to resolve it later on,
17823 if (cu
->language
== language_ada
)
17824 TYPE_STUB (type
) = 1;
17826 return set_die_type (die
, type
, cu
);
17829 /* Read a single die and all its descendents. Set the die's sibling
17830 field to NULL; set other fields in the die correctly, and set all
17831 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17832 location of the info_ptr after reading all of those dies. PARENT
17833 is the parent of the die in question. */
17835 static struct die_info
*
17836 read_die_and_children (const struct die_reader_specs
*reader
,
17837 const gdb_byte
*info_ptr
,
17838 const gdb_byte
**new_info_ptr
,
17839 struct die_info
*parent
)
17841 struct die_info
*die
;
17842 const gdb_byte
*cur_ptr
;
17845 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17848 *new_info_ptr
= cur_ptr
;
17851 store_in_ref_table (die
, reader
->cu
);
17854 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17858 *new_info_ptr
= cur_ptr
;
17861 die
->sibling
= NULL
;
17862 die
->parent
= parent
;
17866 /* Read a die, all of its descendents, and all of its siblings; set
17867 all of the fields of all of the dies correctly. Arguments are as
17868 in read_die_and_children. */
17870 static struct die_info
*
17871 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17872 const gdb_byte
*info_ptr
,
17873 const gdb_byte
**new_info_ptr
,
17874 struct die_info
*parent
)
17876 struct die_info
*first_die
, *last_sibling
;
17877 const gdb_byte
*cur_ptr
;
17879 cur_ptr
= info_ptr
;
17880 first_die
= last_sibling
= NULL
;
17884 struct die_info
*die
17885 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17889 *new_info_ptr
= cur_ptr
;
17896 last_sibling
->sibling
= die
;
17898 last_sibling
= die
;
17902 /* Read a die, all of its descendents, and all of its siblings; set
17903 all of the fields of all of the dies correctly. Arguments are as
17904 in read_die_and_children.
17905 This the main entry point for reading a DIE and all its children. */
17907 static struct die_info
*
17908 read_die_and_siblings (const struct die_reader_specs
*reader
,
17909 const gdb_byte
*info_ptr
,
17910 const gdb_byte
**new_info_ptr
,
17911 struct die_info
*parent
)
17913 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17914 new_info_ptr
, parent
);
17916 if (dwarf_die_debug
)
17918 fprintf_unfiltered (gdb_stdlog
,
17919 "Read die from %s@0x%x of %s:\n",
17920 get_section_name (reader
->die_section
),
17921 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17922 bfd_get_filename (reader
->abfd
));
17923 dump_die (die
, dwarf_die_debug
);
17929 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17931 The caller is responsible for filling in the extra attributes
17932 and updating (*DIEP)->num_attrs.
17933 Set DIEP to point to a newly allocated die with its information,
17934 except for its child, sibling, and parent fields.
17935 Set HAS_CHILDREN to tell whether the die has children or not. */
17937 static const gdb_byte
*
17938 read_full_die_1 (const struct die_reader_specs
*reader
,
17939 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17940 int *has_children
, int num_extra_attrs
)
17942 unsigned int abbrev_number
, bytes_read
, i
;
17943 struct abbrev_info
*abbrev
;
17944 struct die_info
*die
;
17945 struct dwarf2_cu
*cu
= reader
->cu
;
17946 bfd
*abfd
= reader
->abfd
;
17948 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17949 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17950 info_ptr
+= bytes_read
;
17951 if (!abbrev_number
)
17958 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17960 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17962 bfd_get_filename (abfd
));
17964 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17965 die
->sect_off
= sect_off
;
17966 die
->tag
= abbrev
->tag
;
17967 die
->abbrev
= abbrev_number
;
17969 /* Make the result usable.
17970 The caller needs to update num_attrs after adding the extra
17972 die
->num_attrs
= abbrev
->num_attrs
;
17974 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17975 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17979 *has_children
= abbrev
->has_children
;
17983 /* Read a die and all its attributes.
17984 Set DIEP to point to a newly allocated die with its information,
17985 except for its child, sibling, and parent fields.
17986 Set HAS_CHILDREN to tell whether the die has children or not. */
17988 static const gdb_byte
*
17989 read_full_die (const struct die_reader_specs
*reader
,
17990 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17993 const gdb_byte
*result
;
17995 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17997 if (dwarf_die_debug
)
17999 fprintf_unfiltered (gdb_stdlog
,
18000 "Read die from %s@0x%x of %s:\n",
18001 get_section_name (reader
->die_section
),
18002 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18003 bfd_get_filename (reader
->abfd
));
18004 dump_die (*diep
, dwarf_die_debug
);
18010 /* Abbreviation tables.
18012 In DWARF version 2, the description of the debugging information is
18013 stored in a separate .debug_abbrev section. Before we read any
18014 dies from a section we read in all abbreviations and install them
18015 in a hash table. */
18017 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18019 struct abbrev_info
*
18020 abbrev_table::alloc_abbrev ()
18022 struct abbrev_info
*abbrev
;
18024 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18025 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18030 /* Add an abbreviation to the table. */
18033 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18034 struct abbrev_info
*abbrev
)
18036 unsigned int hash_number
;
18038 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18039 abbrev
->next
= m_abbrevs
[hash_number
];
18040 m_abbrevs
[hash_number
] = abbrev
;
18043 /* Look up an abbrev in the table.
18044 Returns NULL if the abbrev is not found. */
18046 struct abbrev_info
*
18047 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18049 unsigned int hash_number
;
18050 struct abbrev_info
*abbrev
;
18052 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18053 abbrev
= m_abbrevs
[hash_number
];
18057 if (abbrev
->number
== abbrev_number
)
18059 abbrev
= abbrev
->next
;
18064 /* Read in an abbrev table. */
18066 static abbrev_table_up
18067 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18068 struct dwarf2_section_info
*section
,
18069 sect_offset sect_off
)
18071 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18072 bfd
*abfd
= get_section_bfd_owner (section
);
18073 const gdb_byte
*abbrev_ptr
;
18074 struct abbrev_info
*cur_abbrev
;
18075 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18076 unsigned int abbrev_form
;
18077 struct attr_abbrev
*cur_attrs
;
18078 unsigned int allocated_attrs
;
18080 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18082 dwarf2_read_section (objfile
, section
);
18083 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18084 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18085 abbrev_ptr
+= bytes_read
;
18087 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18088 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18090 /* Loop until we reach an abbrev number of 0. */
18091 while (abbrev_number
)
18093 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18095 /* read in abbrev header */
18096 cur_abbrev
->number
= abbrev_number
;
18098 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18099 abbrev_ptr
+= bytes_read
;
18100 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18103 /* now read in declarations */
18106 LONGEST implicit_const
;
18108 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18109 abbrev_ptr
+= bytes_read
;
18110 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18111 abbrev_ptr
+= bytes_read
;
18112 if (abbrev_form
== DW_FORM_implicit_const
)
18114 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18116 abbrev_ptr
+= bytes_read
;
18120 /* Initialize it due to a false compiler warning. */
18121 implicit_const
= -1;
18124 if (abbrev_name
== 0)
18127 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18129 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18131 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18134 cur_attrs
[cur_abbrev
->num_attrs
].name
18135 = (enum dwarf_attribute
) abbrev_name
;
18136 cur_attrs
[cur_abbrev
->num_attrs
].form
18137 = (enum dwarf_form
) abbrev_form
;
18138 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18139 ++cur_abbrev
->num_attrs
;
18142 cur_abbrev
->attrs
=
18143 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18144 cur_abbrev
->num_attrs
);
18145 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18146 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18148 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18150 /* Get next abbreviation.
18151 Under Irix6 the abbreviations for a compilation unit are not
18152 always properly terminated with an abbrev number of 0.
18153 Exit loop if we encounter an abbreviation which we have
18154 already read (which means we are about to read the abbreviations
18155 for the next compile unit) or if the end of the abbreviation
18156 table is reached. */
18157 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18159 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18160 abbrev_ptr
+= bytes_read
;
18161 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18166 return abbrev_table
;
18169 /* Returns nonzero if TAG represents a type that we might generate a partial
18173 is_type_tag_for_partial (int tag
)
18178 /* Some types that would be reasonable to generate partial symbols for,
18179 that we don't at present. */
18180 case DW_TAG_array_type
:
18181 case DW_TAG_file_type
:
18182 case DW_TAG_ptr_to_member_type
:
18183 case DW_TAG_set_type
:
18184 case DW_TAG_string_type
:
18185 case DW_TAG_subroutine_type
:
18187 case DW_TAG_base_type
:
18188 case DW_TAG_class_type
:
18189 case DW_TAG_interface_type
:
18190 case DW_TAG_enumeration_type
:
18191 case DW_TAG_structure_type
:
18192 case DW_TAG_subrange_type
:
18193 case DW_TAG_typedef
:
18194 case DW_TAG_union_type
:
18201 /* Load all DIEs that are interesting for partial symbols into memory. */
18203 static struct partial_die_info
*
18204 load_partial_dies (const struct die_reader_specs
*reader
,
18205 const gdb_byte
*info_ptr
, int building_psymtab
)
18207 struct dwarf2_cu
*cu
= reader
->cu
;
18208 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18209 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18210 unsigned int bytes_read
;
18211 unsigned int load_all
= 0;
18212 int nesting_level
= 1;
18217 gdb_assert (cu
->per_cu
!= NULL
);
18218 if (cu
->per_cu
->load_all_dies
)
18222 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18226 &cu
->comp_unit_obstack
,
18227 hashtab_obstack_allocate
,
18228 dummy_obstack_deallocate
);
18232 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18234 /* A NULL abbrev means the end of a series of children. */
18235 if (abbrev
== NULL
)
18237 if (--nesting_level
== 0)
18240 info_ptr
+= bytes_read
;
18241 last_die
= parent_die
;
18242 parent_die
= parent_die
->die_parent
;
18246 /* Check for template arguments. We never save these; if
18247 they're seen, we just mark the parent, and go on our way. */
18248 if (parent_die
!= NULL
18249 && cu
->language
== language_cplus
18250 && (abbrev
->tag
== DW_TAG_template_type_param
18251 || abbrev
->tag
== DW_TAG_template_value_param
))
18253 parent_die
->has_template_arguments
= 1;
18257 /* We don't need a partial DIE for the template argument. */
18258 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18263 /* We only recurse into c++ subprograms looking for template arguments.
18264 Skip their other children. */
18266 && cu
->language
== language_cplus
18267 && parent_die
!= NULL
18268 && parent_die
->tag
== DW_TAG_subprogram
)
18270 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18274 /* Check whether this DIE is interesting enough to save. Normally
18275 we would not be interested in members here, but there may be
18276 later variables referencing them via DW_AT_specification (for
18277 static members). */
18279 && !is_type_tag_for_partial (abbrev
->tag
)
18280 && abbrev
->tag
!= DW_TAG_constant
18281 && abbrev
->tag
!= DW_TAG_enumerator
18282 && abbrev
->tag
!= DW_TAG_subprogram
18283 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18284 && abbrev
->tag
!= DW_TAG_lexical_block
18285 && abbrev
->tag
!= DW_TAG_variable
18286 && abbrev
->tag
!= DW_TAG_namespace
18287 && abbrev
->tag
!= DW_TAG_module
18288 && abbrev
->tag
!= DW_TAG_member
18289 && abbrev
->tag
!= DW_TAG_imported_unit
18290 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18292 /* Otherwise we skip to the next sibling, if any. */
18293 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18297 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18300 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18302 /* This two-pass algorithm for processing partial symbols has a
18303 high cost in cache pressure. Thus, handle some simple cases
18304 here which cover the majority of C partial symbols. DIEs
18305 which neither have specification tags in them, nor could have
18306 specification tags elsewhere pointing at them, can simply be
18307 processed and discarded.
18309 This segment is also optional; scan_partial_symbols and
18310 add_partial_symbol will handle these DIEs if we chain
18311 them in normally. When compilers which do not emit large
18312 quantities of duplicate debug information are more common,
18313 this code can probably be removed. */
18315 /* Any complete simple types at the top level (pretty much all
18316 of them, for a language without namespaces), can be processed
18318 if (parent_die
== NULL
18319 && pdi
.has_specification
== 0
18320 && pdi
.is_declaration
== 0
18321 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18322 || pdi
.tag
== DW_TAG_base_type
18323 || pdi
.tag
== DW_TAG_subrange_type
))
18325 if (building_psymtab
&& pdi
.name
!= NULL
)
18326 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18327 VAR_DOMAIN
, LOC_TYPEDEF
,
18328 &objfile
->static_psymbols
,
18329 0, cu
->language
, objfile
);
18330 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18334 /* The exception for DW_TAG_typedef with has_children above is
18335 a workaround of GCC PR debug/47510. In the case of this complaint
18336 type_name_no_tag_or_error will error on such types later.
18338 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18339 it could not find the child DIEs referenced later, this is checked
18340 above. In correct DWARF DW_TAG_typedef should have no children. */
18342 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18343 complaint (&symfile_complaints
,
18344 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18345 "- DIE at %s [in module %s]"),
18346 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18348 /* If we're at the second level, and we're an enumerator, and
18349 our parent has no specification (meaning possibly lives in a
18350 namespace elsewhere), then we can add the partial symbol now
18351 instead of queueing it. */
18352 if (pdi
.tag
== DW_TAG_enumerator
18353 && parent_die
!= NULL
18354 && parent_die
->die_parent
== NULL
18355 && parent_die
->tag
== DW_TAG_enumeration_type
18356 && parent_die
->has_specification
== 0)
18358 if (pdi
.name
== NULL
)
18359 complaint (&symfile_complaints
,
18360 _("malformed enumerator DIE ignored"));
18361 else if (building_psymtab
)
18362 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18363 VAR_DOMAIN
, LOC_CONST
,
18364 cu
->language
== language_cplus
18365 ? &objfile
->global_psymbols
18366 : &objfile
->static_psymbols
,
18367 0, cu
->language
, objfile
);
18369 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18373 struct partial_die_info
*part_die
18374 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18376 /* We'll save this DIE so link it in. */
18377 part_die
->die_parent
= parent_die
;
18378 part_die
->die_sibling
= NULL
;
18379 part_die
->die_child
= NULL
;
18381 if (last_die
&& last_die
== parent_die
)
18382 last_die
->die_child
= part_die
;
18384 last_die
->die_sibling
= part_die
;
18386 last_die
= part_die
;
18388 if (first_die
== NULL
)
18389 first_die
= part_die
;
18391 /* Maybe add the DIE to the hash table. Not all DIEs that we
18392 find interesting need to be in the hash table, because we
18393 also have the parent/sibling/child chains; only those that we
18394 might refer to by offset later during partial symbol reading.
18396 For now this means things that might have be the target of a
18397 DW_AT_specification, DW_AT_abstract_origin, or
18398 DW_AT_extension. DW_AT_extension will refer only to
18399 namespaces; DW_AT_abstract_origin refers to functions (and
18400 many things under the function DIE, but we do not recurse
18401 into function DIEs during partial symbol reading) and
18402 possibly variables as well; DW_AT_specification refers to
18403 declarations. Declarations ought to have the DW_AT_declaration
18404 flag. It happens that GCC forgets to put it in sometimes, but
18405 only for functions, not for types.
18407 Adding more things than necessary to the hash table is harmless
18408 except for the performance cost. Adding too few will result in
18409 wasted time in find_partial_die, when we reread the compilation
18410 unit with load_all_dies set. */
18413 || abbrev
->tag
== DW_TAG_constant
18414 || abbrev
->tag
== DW_TAG_subprogram
18415 || abbrev
->tag
== DW_TAG_variable
18416 || abbrev
->tag
== DW_TAG_namespace
18417 || part_die
->is_declaration
)
18421 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18422 to_underlying (part_die
->sect_off
),
18427 /* For some DIEs we want to follow their children (if any). For C
18428 we have no reason to follow the children of structures; for other
18429 languages we have to, so that we can get at method physnames
18430 to infer fully qualified class names, for DW_AT_specification,
18431 and for C++ template arguments. For C++, we also look one level
18432 inside functions to find template arguments (if the name of the
18433 function does not already contain the template arguments).
18435 For Ada, we need to scan the children of subprograms and lexical
18436 blocks as well because Ada allows the definition of nested
18437 entities that could be interesting for the debugger, such as
18438 nested subprograms for instance. */
18439 if (last_die
->has_children
18441 || last_die
->tag
== DW_TAG_namespace
18442 || last_die
->tag
== DW_TAG_module
18443 || last_die
->tag
== DW_TAG_enumeration_type
18444 || (cu
->language
== language_cplus
18445 && last_die
->tag
== DW_TAG_subprogram
18446 && (last_die
->name
== NULL
18447 || strchr (last_die
->name
, '<') == NULL
))
18448 || (cu
->language
!= language_c
18449 && (last_die
->tag
== DW_TAG_class_type
18450 || last_die
->tag
== DW_TAG_interface_type
18451 || last_die
->tag
== DW_TAG_structure_type
18452 || last_die
->tag
== DW_TAG_union_type
))
18453 || (cu
->language
== language_ada
18454 && (last_die
->tag
== DW_TAG_subprogram
18455 || last_die
->tag
== DW_TAG_lexical_block
))))
18458 parent_die
= last_die
;
18462 /* Otherwise we skip to the next sibling, if any. */
18463 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18465 /* Back to the top, do it again. */
18469 partial_die_info::partial_die_info (sect_offset sect_off_
,
18470 struct abbrev_info
*abbrev
)
18471 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18475 /* Read a minimal amount of information into the minimal die structure.
18476 INFO_PTR should point just after the initial uleb128 of a DIE. */
18479 partial_die_info::read (const struct die_reader_specs
*reader
,
18480 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18482 struct dwarf2_cu
*cu
= reader
->cu
;
18483 struct dwarf2_per_objfile
*dwarf2_per_objfile
18484 = cu
->per_cu
->dwarf2_per_objfile
;
18486 int has_low_pc_attr
= 0;
18487 int has_high_pc_attr
= 0;
18488 int high_pc_relative
= 0;
18490 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18492 struct attribute attr
;
18494 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18496 /* Store the data if it is of an attribute we want to keep in a
18497 partial symbol table. */
18503 case DW_TAG_compile_unit
:
18504 case DW_TAG_partial_unit
:
18505 case DW_TAG_type_unit
:
18506 /* Compilation units have a DW_AT_name that is a filename, not
18507 a source language identifier. */
18508 case DW_TAG_enumeration_type
:
18509 case DW_TAG_enumerator
:
18510 /* These tags always have simple identifiers already; no need
18511 to canonicalize them. */
18512 name
= DW_STRING (&attr
);
18516 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18519 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18520 &objfile
->per_bfd
->storage_obstack
);
18525 case DW_AT_linkage_name
:
18526 case DW_AT_MIPS_linkage_name
:
18527 /* Note that both forms of linkage name might appear. We
18528 assume they will be the same, and we only store the last
18530 if (cu
->language
== language_ada
)
18531 name
= DW_STRING (&attr
);
18532 linkage_name
= DW_STRING (&attr
);
18535 has_low_pc_attr
= 1;
18536 lowpc
= attr_value_as_address (&attr
);
18538 case DW_AT_high_pc
:
18539 has_high_pc_attr
= 1;
18540 highpc
= attr_value_as_address (&attr
);
18541 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18542 high_pc_relative
= 1;
18544 case DW_AT_location
:
18545 /* Support the .debug_loc offsets. */
18546 if (attr_form_is_block (&attr
))
18548 d
.locdesc
= DW_BLOCK (&attr
);
18550 else if (attr_form_is_section_offset (&attr
))
18552 dwarf2_complex_location_expr_complaint ();
18556 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18557 "partial symbol information");
18560 case DW_AT_external
:
18561 is_external
= DW_UNSND (&attr
);
18563 case DW_AT_declaration
:
18564 is_declaration
= DW_UNSND (&attr
);
18569 case DW_AT_abstract_origin
:
18570 case DW_AT_specification
:
18571 case DW_AT_extension
:
18572 has_specification
= 1;
18573 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18574 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18575 || cu
->per_cu
->is_dwz
);
18577 case DW_AT_sibling
:
18578 /* Ignore absolute siblings, they might point outside of
18579 the current compile unit. */
18580 if (attr
.form
== DW_FORM_ref_addr
)
18581 complaint (&symfile_complaints
,
18582 _("ignoring absolute DW_AT_sibling"));
18585 const gdb_byte
*buffer
= reader
->buffer
;
18586 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18587 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18589 if (sibling_ptr
< info_ptr
)
18590 complaint (&symfile_complaints
,
18591 _("DW_AT_sibling points backwards"));
18592 else if (sibling_ptr
> reader
->buffer_end
)
18593 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18595 sibling
= sibling_ptr
;
18598 case DW_AT_byte_size
:
18601 case DW_AT_const_value
:
18602 has_const_value
= 1;
18604 case DW_AT_calling_convention
:
18605 /* DWARF doesn't provide a way to identify a program's source-level
18606 entry point. DW_AT_calling_convention attributes are only meant
18607 to describe functions' calling conventions.
18609 However, because it's a necessary piece of information in
18610 Fortran, and before DWARF 4 DW_CC_program was the only
18611 piece of debugging information whose definition refers to
18612 a 'main program' at all, several compilers marked Fortran
18613 main programs with DW_CC_program --- even when those
18614 functions use the standard calling conventions.
18616 Although DWARF now specifies a way to provide this
18617 information, we support this practice for backward
18619 if (DW_UNSND (&attr
) == DW_CC_program
18620 && cu
->language
== language_fortran
)
18621 main_subprogram
= 1;
18624 if (DW_UNSND (&attr
) == DW_INL_inlined
18625 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18626 may_be_inlined
= 1;
18630 if (tag
== DW_TAG_imported_unit
)
18632 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18633 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18634 || cu
->per_cu
->is_dwz
);
18638 case DW_AT_main_subprogram
:
18639 main_subprogram
= DW_UNSND (&attr
);
18647 if (high_pc_relative
)
18650 if (has_low_pc_attr
&& has_high_pc_attr
)
18652 /* When using the GNU linker, .gnu.linkonce. sections are used to
18653 eliminate duplicate copies of functions and vtables and such.
18654 The linker will arbitrarily choose one and discard the others.
18655 The AT_*_pc values for such functions refer to local labels in
18656 these sections. If the section from that file was discarded, the
18657 labels are not in the output, so the relocs get a value of 0.
18658 If this is a discarded function, mark the pc bounds as invalid,
18659 so that GDB will ignore it. */
18660 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18662 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18663 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18665 complaint (&symfile_complaints
,
18666 _("DW_AT_low_pc %s is zero "
18667 "for DIE at %s [in module %s]"),
18668 paddress (gdbarch
, lowpc
),
18669 sect_offset_str (sect_off
),
18670 objfile_name (objfile
));
18672 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18673 else if (lowpc
>= highpc
)
18675 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18676 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18678 complaint (&symfile_complaints
,
18679 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18680 "for DIE at %s [in module %s]"),
18681 paddress (gdbarch
, lowpc
),
18682 paddress (gdbarch
, highpc
),
18683 sect_offset_str (sect_off
),
18684 objfile_name (objfile
));
18693 /* Find a cached partial DIE at OFFSET in CU. */
18695 struct partial_die_info
*
18696 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18698 struct partial_die_info
*lookup_die
= NULL
;
18699 struct partial_die_info
part_die (sect_off
);
18701 lookup_die
= ((struct partial_die_info
*)
18702 htab_find_with_hash (partial_dies
, &part_die
,
18703 to_underlying (sect_off
)));
18708 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18709 except in the case of .debug_types DIEs which do not reference
18710 outside their CU (they do however referencing other types via
18711 DW_FORM_ref_sig8). */
18713 static struct partial_die_info
*
18714 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18716 struct dwarf2_per_objfile
*dwarf2_per_objfile
18717 = cu
->per_cu
->dwarf2_per_objfile
;
18718 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18719 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18720 struct partial_die_info
*pd
= NULL
;
18722 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18723 && offset_in_cu_p (&cu
->header
, sect_off
))
18725 pd
= cu
->find_partial_die (sect_off
);
18728 /* We missed recording what we needed.
18729 Load all dies and try again. */
18730 per_cu
= cu
->per_cu
;
18734 /* TUs don't reference other CUs/TUs (except via type signatures). */
18735 if (cu
->per_cu
->is_debug_types
)
18737 error (_("Dwarf Error: Type Unit at offset %s contains"
18738 " external reference to offset %s [in module %s].\n"),
18739 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18740 bfd_get_filename (objfile
->obfd
));
18742 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18743 dwarf2_per_objfile
);
18745 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18746 load_partial_comp_unit (per_cu
);
18748 per_cu
->cu
->last_used
= 0;
18749 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18752 /* If we didn't find it, and not all dies have been loaded,
18753 load them all and try again. */
18755 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18757 per_cu
->load_all_dies
= 1;
18759 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18760 THIS_CU->cu may already be in use. So we can't just free it and
18761 replace its DIEs with the ones we read in. Instead, we leave those
18762 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18763 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18765 load_partial_comp_unit (per_cu
);
18767 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18771 internal_error (__FILE__
, __LINE__
,
18772 _("could not find partial DIE %s "
18773 "in cache [from module %s]\n"),
18774 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18778 /* See if we can figure out if the class lives in a namespace. We do
18779 this by looking for a member function; its demangled name will
18780 contain namespace info, if there is any. */
18783 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18784 struct dwarf2_cu
*cu
)
18786 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18787 what template types look like, because the demangler
18788 frequently doesn't give the same name as the debug info. We
18789 could fix this by only using the demangled name to get the
18790 prefix (but see comment in read_structure_type). */
18792 struct partial_die_info
*real_pdi
;
18793 struct partial_die_info
*child_pdi
;
18795 /* If this DIE (this DIE's specification, if any) has a parent, then
18796 we should not do this. We'll prepend the parent's fully qualified
18797 name when we create the partial symbol. */
18799 real_pdi
= struct_pdi
;
18800 while (real_pdi
->has_specification
)
18801 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18802 real_pdi
->spec_is_dwz
, cu
);
18804 if (real_pdi
->die_parent
!= NULL
)
18807 for (child_pdi
= struct_pdi
->die_child
;
18809 child_pdi
= child_pdi
->die_sibling
)
18811 if (child_pdi
->tag
== DW_TAG_subprogram
18812 && child_pdi
->linkage_name
!= NULL
)
18814 char *actual_class_name
18815 = language_class_name_from_physname (cu
->language_defn
,
18816 child_pdi
->linkage_name
);
18817 if (actual_class_name
!= NULL
)
18819 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18822 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18824 strlen (actual_class_name
)));
18825 xfree (actual_class_name
);
18833 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18835 /* Once we've fixed up a die, there's no point in doing so again.
18836 This also avoids a memory leak if we were to call
18837 guess_partial_die_structure_name multiple times. */
18841 /* If we found a reference attribute and the DIE has no name, try
18842 to find a name in the referred to DIE. */
18844 if (name
== NULL
&& has_specification
)
18846 struct partial_die_info
*spec_die
;
18848 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18850 spec_die
->fixup (cu
);
18852 if (spec_die
->name
)
18854 name
= spec_die
->name
;
18856 /* Copy DW_AT_external attribute if it is set. */
18857 if (spec_die
->is_external
)
18858 is_external
= spec_die
->is_external
;
18862 /* Set default names for some unnamed DIEs. */
18864 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18865 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18867 /* If there is no parent die to provide a namespace, and there are
18868 children, see if we can determine the namespace from their linkage
18870 if (cu
->language
== language_cplus
18871 && !VEC_empty (dwarf2_section_info_def
,
18872 cu
->per_cu
->dwarf2_per_objfile
->types
)
18873 && die_parent
== NULL
18875 && (tag
== DW_TAG_class_type
18876 || tag
== DW_TAG_structure_type
18877 || tag
== DW_TAG_union_type
))
18878 guess_partial_die_structure_name (this, cu
);
18880 /* GCC might emit a nameless struct or union that has a linkage
18881 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18883 && (tag
== DW_TAG_class_type
18884 || tag
== DW_TAG_interface_type
18885 || tag
== DW_TAG_structure_type
18886 || tag
== DW_TAG_union_type
)
18887 && linkage_name
!= NULL
)
18891 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18896 /* Strip any leading namespaces/classes, keep only the base name.
18897 DW_AT_name for named DIEs does not contain the prefixes. */
18898 base
= strrchr (demangled
, ':');
18899 if (base
&& base
> demangled
&& base
[-1] == ':')
18904 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18907 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18908 base
, strlen (base
)));
18916 /* Read an attribute value described by an attribute form. */
18918 static const gdb_byte
*
18919 read_attribute_value (const struct die_reader_specs
*reader
,
18920 struct attribute
*attr
, unsigned form
,
18921 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18923 struct dwarf2_cu
*cu
= reader
->cu
;
18924 struct dwarf2_per_objfile
*dwarf2_per_objfile
18925 = cu
->per_cu
->dwarf2_per_objfile
;
18926 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18927 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18928 bfd
*abfd
= reader
->abfd
;
18929 struct comp_unit_head
*cu_header
= &cu
->header
;
18930 unsigned int bytes_read
;
18931 struct dwarf_block
*blk
;
18933 attr
->form
= (enum dwarf_form
) form
;
18936 case DW_FORM_ref_addr
:
18937 if (cu
->header
.version
== 2)
18938 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18940 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18941 &cu
->header
, &bytes_read
);
18942 info_ptr
+= bytes_read
;
18944 case DW_FORM_GNU_ref_alt
:
18945 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18946 info_ptr
+= bytes_read
;
18949 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18950 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18951 info_ptr
+= bytes_read
;
18953 case DW_FORM_block2
:
18954 blk
= dwarf_alloc_block (cu
);
18955 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18957 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18958 info_ptr
+= blk
->size
;
18959 DW_BLOCK (attr
) = blk
;
18961 case DW_FORM_block4
:
18962 blk
= dwarf_alloc_block (cu
);
18963 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18965 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18966 info_ptr
+= blk
->size
;
18967 DW_BLOCK (attr
) = blk
;
18969 case DW_FORM_data2
:
18970 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18973 case DW_FORM_data4
:
18974 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18977 case DW_FORM_data8
:
18978 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18981 case DW_FORM_data16
:
18982 blk
= dwarf_alloc_block (cu
);
18984 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18986 DW_BLOCK (attr
) = blk
;
18988 case DW_FORM_sec_offset
:
18989 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18990 info_ptr
+= bytes_read
;
18992 case DW_FORM_string
:
18993 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18994 DW_STRING_IS_CANONICAL (attr
) = 0;
18995 info_ptr
+= bytes_read
;
18998 if (!cu
->per_cu
->is_dwz
)
19000 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19001 abfd
, info_ptr
, cu_header
,
19003 DW_STRING_IS_CANONICAL (attr
) = 0;
19004 info_ptr
+= bytes_read
;
19008 case DW_FORM_line_strp
:
19009 if (!cu
->per_cu
->is_dwz
)
19011 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19013 cu_header
, &bytes_read
);
19014 DW_STRING_IS_CANONICAL (attr
) = 0;
19015 info_ptr
+= bytes_read
;
19019 case DW_FORM_GNU_strp_alt
:
19021 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19022 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19025 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19027 DW_STRING_IS_CANONICAL (attr
) = 0;
19028 info_ptr
+= bytes_read
;
19031 case DW_FORM_exprloc
:
19032 case DW_FORM_block
:
19033 blk
= dwarf_alloc_block (cu
);
19034 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19035 info_ptr
+= bytes_read
;
19036 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19037 info_ptr
+= blk
->size
;
19038 DW_BLOCK (attr
) = blk
;
19040 case DW_FORM_block1
:
19041 blk
= dwarf_alloc_block (cu
);
19042 blk
->size
= read_1_byte (abfd
, info_ptr
);
19044 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19045 info_ptr
+= blk
->size
;
19046 DW_BLOCK (attr
) = blk
;
19048 case DW_FORM_data1
:
19049 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19053 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19056 case DW_FORM_flag_present
:
19057 DW_UNSND (attr
) = 1;
19059 case DW_FORM_sdata
:
19060 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19061 info_ptr
+= bytes_read
;
19063 case DW_FORM_udata
:
19064 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19065 info_ptr
+= bytes_read
;
19068 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19069 + read_1_byte (abfd
, info_ptr
));
19073 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19074 + read_2_bytes (abfd
, info_ptr
));
19078 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19079 + read_4_bytes (abfd
, info_ptr
));
19083 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19084 + read_8_bytes (abfd
, info_ptr
));
19087 case DW_FORM_ref_sig8
:
19088 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19091 case DW_FORM_ref_udata
:
19092 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19093 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19094 info_ptr
+= bytes_read
;
19096 case DW_FORM_indirect
:
19097 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19098 info_ptr
+= bytes_read
;
19099 if (form
== DW_FORM_implicit_const
)
19101 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19102 info_ptr
+= bytes_read
;
19104 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19107 case DW_FORM_implicit_const
:
19108 DW_SND (attr
) = implicit_const
;
19110 case DW_FORM_GNU_addr_index
:
19111 if (reader
->dwo_file
== NULL
)
19113 /* For now flag a hard error.
19114 Later we can turn this into a complaint. */
19115 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19116 dwarf_form_name (form
),
19117 bfd_get_filename (abfd
));
19119 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19120 info_ptr
+= bytes_read
;
19122 case DW_FORM_GNU_str_index
:
19123 if (reader
->dwo_file
== NULL
)
19125 /* For now flag a hard error.
19126 Later we can turn this into a complaint if warranted. */
19127 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19128 dwarf_form_name (form
),
19129 bfd_get_filename (abfd
));
19132 ULONGEST str_index
=
19133 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19135 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19136 DW_STRING_IS_CANONICAL (attr
) = 0;
19137 info_ptr
+= bytes_read
;
19141 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19142 dwarf_form_name (form
),
19143 bfd_get_filename (abfd
));
19147 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19148 attr
->form
= DW_FORM_GNU_ref_alt
;
19150 /* We have seen instances where the compiler tried to emit a byte
19151 size attribute of -1 which ended up being encoded as an unsigned
19152 0xffffffff. Although 0xffffffff is technically a valid size value,
19153 an object of this size seems pretty unlikely so we can relatively
19154 safely treat these cases as if the size attribute was invalid and
19155 treat them as zero by default. */
19156 if (attr
->name
== DW_AT_byte_size
19157 && form
== DW_FORM_data4
19158 && DW_UNSND (attr
) >= 0xffffffff)
19161 (&symfile_complaints
,
19162 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19163 hex_string (DW_UNSND (attr
)));
19164 DW_UNSND (attr
) = 0;
19170 /* Read an attribute described by an abbreviated attribute. */
19172 static const gdb_byte
*
19173 read_attribute (const struct die_reader_specs
*reader
,
19174 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19175 const gdb_byte
*info_ptr
)
19177 attr
->name
= abbrev
->name
;
19178 return read_attribute_value (reader
, attr
, abbrev
->form
,
19179 abbrev
->implicit_const
, info_ptr
);
19182 /* Read dwarf information from a buffer. */
19184 static unsigned int
19185 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19187 return bfd_get_8 (abfd
, buf
);
19191 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19193 return bfd_get_signed_8 (abfd
, buf
);
19196 static unsigned int
19197 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19199 return bfd_get_16 (abfd
, buf
);
19203 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19205 return bfd_get_signed_16 (abfd
, buf
);
19208 static unsigned int
19209 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19211 return bfd_get_32 (abfd
, buf
);
19215 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19217 return bfd_get_signed_32 (abfd
, buf
);
19221 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19223 return bfd_get_64 (abfd
, buf
);
19227 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19228 unsigned int *bytes_read
)
19230 struct comp_unit_head
*cu_header
= &cu
->header
;
19231 CORE_ADDR retval
= 0;
19233 if (cu_header
->signed_addr_p
)
19235 switch (cu_header
->addr_size
)
19238 retval
= bfd_get_signed_16 (abfd
, buf
);
19241 retval
= bfd_get_signed_32 (abfd
, buf
);
19244 retval
= bfd_get_signed_64 (abfd
, buf
);
19247 internal_error (__FILE__
, __LINE__
,
19248 _("read_address: bad switch, signed [in module %s]"),
19249 bfd_get_filename (abfd
));
19254 switch (cu_header
->addr_size
)
19257 retval
= bfd_get_16 (abfd
, buf
);
19260 retval
= bfd_get_32 (abfd
, buf
);
19263 retval
= bfd_get_64 (abfd
, buf
);
19266 internal_error (__FILE__
, __LINE__
,
19267 _("read_address: bad switch, "
19268 "unsigned [in module %s]"),
19269 bfd_get_filename (abfd
));
19273 *bytes_read
= cu_header
->addr_size
;
19277 /* Read the initial length from a section. The (draft) DWARF 3
19278 specification allows the initial length to take up either 4 bytes
19279 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19280 bytes describe the length and all offsets will be 8 bytes in length
19283 An older, non-standard 64-bit format is also handled by this
19284 function. The older format in question stores the initial length
19285 as an 8-byte quantity without an escape value. Lengths greater
19286 than 2^32 aren't very common which means that the initial 4 bytes
19287 is almost always zero. Since a length value of zero doesn't make
19288 sense for the 32-bit format, this initial zero can be considered to
19289 be an escape value which indicates the presence of the older 64-bit
19290 format. As written, the code can't detect (old format) lengths
19291 greater than 4GB. If it becomes necessary to handle lengths
19292 somewhat larger than 4GB, we could allow other small values (such
19293 as the non-sensical values of 1, 2, and 3) to also be used as
19294 escape values indicating the presence of the old format.
19296 The value returned via bytes_read should be used to increment the
19297 relevant pointer after calling read_initial_length().
19299 [ Note: read_initial_length() and read_offset() are based on the
19300 document entitled "DWARF Debugging Information Format", revision
19301 3, draft 8, dated November 19, 2001. This document was obtained
19304 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19306 This document is only a draft and is subject to change. (So beware.)
19308 Details regarding the older, non-standard 64-bit format were
19309 determined empirically by examining 64-bit ELF files produced by
19310 the SGI toolchain on an IRIX 6.5 machine.
19312 - Kevin, July 16, 2002
19316 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19318 LONGEST length
= bfd_get_32 (abfd
, buf
);
19320 if (length
== 0xffffffff)
19322 length
= bfd_get_64 (abfd
, buf
+ 4);
19325 else if (length
== 0)
19327 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19328 length
= bfd_get_64 (abfd
, buf
);
19339 /* Cover function for read_initial_length.
19340 Returns the length of the object at BUF, and stores the size of the
19341 initial length in *BYTES_READ and stores the size that offsets will be in
19343 If the initial length size is not equivalent to that specified in
19344 CU_HEADER then issue a complaint.
19345 This is useful when reading non-comp-unit headers. */
19348 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19349 const struct comp_unit_head
*cu_header
,
19350 unsigned int *bytes_read
,
19351 unsigned int *offset_size
)
19353 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19355 gdb_assert (cu_header
->initial_length_size
== 4
19356 || cu_header
->initial_length_size
== 8
19357 || cu_header
->initial_length_size
== 12);
19359 if (cu_header
->initial_length_size
!= *bytes_read
)
19360 complaint (&symfile_complaints
,
19361 _("intermixed 32-bit and 64-bit DWARF sections"));
19363 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19367 /* Read an offset from the data stream. The size of the offset is
19368 given by cu_header->offset_size. */
19371 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19372 const struct comp_unit_head
*cu_header
,
19373 unsigned int *bytes_read
)
19375 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19377 *bytes_read
= cu_header
->offset_size
;
19381 /* Read an offset from the data stream. */
19384 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19386 LONGEST retval
= 0;
19388 switch (offset_size
)
19391 retval
= bfd_get_32 (abfd
, buf
);
19394 retval
= bfd_get_64 (abfd
, buf
);
19397 internal_error (__FILE__
, __LINE__
,
19398 _("read_offset_1: bad switch [in module %s]"),
19399 bfd_get_filename (abfd
));
19405 static const gdb_byte
*
19406 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19408 /* If the size of a host char is 8 bits, we can return a pointer
19409 to the buffer, otherwise we have to copy the data to a buffer
19410 allocated on the temporary obstack. */
19411 gdb_assert (HOST_CHAR_BIT
== 8);
19415 static const char *
19416 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19417 unsigned int *bytes_read_ptr
)
19419 /* If the size of a host char is 8 bits, we can return a pointer
19420 to the string, otherwise we have to copy the string to a buffer
19421 allocated on the temporary obstack. */
19422 gdb_assert (HOST_CHAR_BIT
== 8);
19425 *bytes_read_ptr
= 1;
19428 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19429 return (const char *) buf
;
19432 /* Return pointer to string at section SECT offset STR_OFFSET with error
19433 reporting strings FORM_NAME and SECT_NAME. */
19435 static const char *
19436 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19437 bfd
*abfd
, LONGEST str_offset
,
19438 struct dwarf2_section_info
*sect
,
19439 const char *form_name
,
19440 const char *sect_name
)
19442 dwarf2_read_section (objfile
, sect
);
19443 if (sect
->buffer
== NULL
)
19444 error (_("%s used without %s section [in module %s]"),
19445 form_name
, sect_name
, bfd_get_filename (abfd
));
19446 if (str_offset
>= sect
->size
)
19447 error (_("%s pointing outside of %s section [in module %s]"),
19448 form_name
, sect_name
, bfd_get_filename (abfd
));
19449 gdb_assert (HOST_CHAR_BIT
== 8);
19450 if (sect
->buffer
[str_offset
] == '\0')
19452 return (const char *) (sect
->buffer
+ str_offset
);
19455 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19457 static const char *
19458 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19459 bfd
*abfd
, LONGEST str_offset
)
19461 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19463 &dwarf2_per_objfile
->str
,
19464 "DW_FORM_strp", ".debug_str");
19467 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19469 static const char *
19470 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19471 bfd
*abfd
, LONGEST str_offset
)
19473 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19475 &dwarf2_per_objfile
->line_str
,
19476 "DW_FORM_line_strp",
19477 ".debug_line_str");
19480 /* Read a string at offset STR_OFFSET in the .debug_str section from
19481 the .dwz file DWZ. Throw an error if the offset is too large. If
19482 the string consists of a single NUL byte, return NULL; otherwise
19483 return a pointer to the string. */
19485 static const char *
19486 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19487 LONGEST str_offset
)
19489 dwarf2_read_section (objfile
, &dwz
->str
);
19491 if (dwz
->str
.buffer
== NULL
)
19492 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19493 "section [in module %s]"),
19494 bfd_get_filename (dwz
->dwz_bfd
));
19495 if (str_offset
>= dwz
->str
.size
)
19496 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19497 ".debug_str section [in module %s]"),
19498 bfd_get_filename (dwz
->dwz_bfd
));
19499 gdb_assert (HOST_CHAR_BIT
== 8);
19500 if (dwz
->str
.buffer
[str_offset
] == '\0')
19502 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19505 /* Return pointer to string at .debug_str offset as read from BUF.
19506 BUF is assumed to be in a compilation unit described by CU_HEADER.
19507 Return *BYTES_READ_PTR count of bytes read from BUF. */
19509 static const char *
19510 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19511 const gdb_byte
*buf
,
19512 const struct comp_unit_head
*cu_header
,
19513 unsigned int *bytes_read_ptr
)
19515 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19517 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19520 /* Return pointer to string at .debug_line_str offset as read from BUF.
19521 BUF is assumed to be in a compilation unit described by CU_HEADER.
19522 Return *BYTES_READ_PTR count of bytes read from BUF. */
19524 static const char *
19525 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19526 bfd
*abfd
, const gdb_byte
*buf
,
19527 const struct comp_unit_head
*cu_header
,
19528 unsigned int *bytes_read_ptr
)
19530 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19532 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19537 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19538 unsigned int *bytes_read_ptr
)
19541 unsigned int num_read
;
19543 unsigned char byte
;
19550 byte
= bfd_get_8 (abfd
, buf
);
19553 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19554 if ((byte
& 128) == 0)
19560 *bytes_read_ptr
= num_read
;
19565 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19566 unsigned int *bytes_read_ptr
)
19569 int shift
, num_read
;
19570 unsigned char byte
;
19577 byte
= bfd_get_8 (abfd
, buf
);
19580 result
|= ((LONGEST
) (byte
& 127) << shift
);
19582 if ((byte
& 128) == 0)
19587 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19588 result
|= -(((LONGEST
) 1) << shift
);
19589 *bytes_read_ptr
= num_read
;
19593 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19594 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19595 ADDR_SIZE is the size of addresses from the CU header. */
19598 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19599 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19601 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19602 bfd
*abfd
= objfile
->obfd
;
19603 const gdb_byte
*info_ptr
;
19605 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19606 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19607 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19608 objfile_name (objfile
));
19609 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19610 error (_("DW_FORM_addr_index pointing outside of "
19611 ".debug_addr section [in module %s]"),
19612 objfile_name (objfile
));
19613 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19614 + addr_base
+ addr_index
* addr_size
);
19615 if (addr_size
== 4)
19616 return bfd_get_32 (abfd
, info_ptr
);
19618 return bfd_get_64 (abfd
, info_ptr
);
19621 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19624 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19626 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19627 cu
->addr_base
, cu
->header
.addr_size
);
19630 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19633 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19634 unsigned int *bytes_read
)
19636 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19637 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19639 return read_addr_index (cu
, addr_index
);
19642 /* Data structure to pass results from dwarf2_read_addr_index_reader
19643 back to dwarf2_read_addr_index. */
19645 struct dwarf2_read_addr_index_data
19647 ULONGEST addr_base
;
19651 /* die_reader_func for dwarf2_read_addr_index. */
19654 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19655 const gdb_byte
*info_ptr
,
19656 struct die_info
*comp_unit_die
,
19660 struct dwarf2_cu
*cu
= reader
->cu
;
19661 struct dwarf2_read_addr_index_data
*aidata
=
19662 (struct dwarf2_read_addr_index_data
*) data
;
19664 aidata
->addr_base
= cu
->addr_base
;
19665 aidata
->addr_size
= cu
->header
.addr_size
;
19668 /* Given an index in .debug_addr, fetch the value.
19669 NOTE: This can be called during dwarf expression evaluation,
19670 long after the debug information has been read, and thus per_cu->cu
19671 may no longer exist. */
19674 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19675 unsigned int addr_index
)
19677 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19678 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19679 struct dwarf2_cu
*cu
= per_cu
->cu
;
19680 ULONGEST addr_base
;
19683 /* We need addr_base and addr_size.
19684 If we don't have PER_CU->cu, we have to get it.
19685 Nasty, but the alternative is storing the needed info in PER_CU,
19686 which at this point doesn't seem justified: it's not clear how frequently
19687 it would get used and it would increase the size of every PER_CU.
19688 Entry points like dwarf2_per_cu_addr_size do a similar thing
19689 so we're not in uncharted territory here.
19690 Alas we need to be a bit more complicated as addr_base is contained
19693 We don't need to read the entire CU(/TU).
19694 We just need the header and top level die.
19696 IWBN to use the aging mechanism to let us lazily later discard the CU.
19697 For now we skip this optimization. */
19701 addr_base
= cu
->addr_base
;
19702 addr_size
= cu
->header
.addr_size
;
19706 struct dwarf2_read_addr_index_data aidata
;
19708 /* Note: We can't use init_cutu_and_read_dies_simple here,
19709 we need addr_base. */
19710 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
19711 dwarf2_read_addr_index_reader
, &aidata
);
19712 addr_base
= aidata
.addr_base
;
19713 addr_size
= aidata
.addr_size
;
19716 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19720 /* Given a DW_FORM_GNU_str_index, fetch the string.
19721 This is only used by the Fission support. */
19723 static const char *
19724 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19726 struct dwarf2_cu
*cu
= reader
->cu
;
19727 struct dwarf2_per_objfile
*dwarf2_per_objfile
19728 = cu
->per_cu
->dwarf2_per_objfile
;
19729 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19730 const char *objf_name
= objfile_name (objfile
);
19731 bfd
*abfd
= objfile
->obfd
;
19732 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19733 struct dwarf2_section_info
*str_offsets_section
=
19734 &reader
->dwo_file
->sections
.str_offsets
;
19735 const gdb_byte
*info_ptr
;
19736 ULONGEST str_offset
;
19737 static const char form_name
[] = "DW_FORM_GNU_str_index";
19739 dwarf2_read_section (objfile
, str_section
);
19740 dwarf2_read_section (objfile
, str_offsets_section
);
19741 if (str_section
->buffer
== NULL
)
19742 error (_("%s used without .debug_str.dwo section"
19743 " in CU at offset %s [in module %s]"),
19744 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19745 if (str_offsets_section
->buffer
== NULL
)
19746 error (_("%s used without .debug_str_offsets.dwo section"
19747 " in CU at offset %s [in module %s]"),
19748 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19749 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19750 error (_("%s pointing outside of .debug_str_offsets.dwo"
19751 " section in CU at offset %s [in module %s]"),
19752 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19753 info_ptr
= (str_offsets_section
->buffer
19754 + str_index
* cu
->header
.offset_size
);
19755 if (cu
->header
.offset_size
== 4)
19756 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19758 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19759 if (str_offset
>= str_section
->size
)
19760 error (_("Offset from %s pointing outside of"
19761 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19762 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19763 return (const char *) (str_section
->buffer
+ str_offset
);
19766 /* Return the length of an LEB128 number in BUF. */
19769 leb128_size (const gdb_byte
*buf
)
19771 const gdb_byte
*begin
= buf
;
19777 if ((byte
& 128) == 0)
19778 return buf
- begin
;
19783 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19792 cu
->language
= language_c
;
19795 case DW_LANG_C_plus_plus
:
19796 case DW_LANG_C_plus_plus_11
:
19797 case DW_LANG_C_plus_plus_14
:
19798 cu
->language
= language_cplus
;
19801 cu
->language
= language_d
;
19803 case DW_LANG_Fortran77
:
19804 case DW_LANG_Fortran90
:
19805 case DW_LANG_Fortran95
:
19806 case DW_LANG_Fortran03
:
19807 case DW_LANG_Fortran08
:
19808 cu
->language
= language_fortran
;
19811 cu
->language
= language_go
;
19813 case DW_LANG_Mips_Assembler
:
19814 cu
->language
= language_asm
;
19816 case DW_LANG_Ada83
:
19817 case DW_LANG_Ada95
:
19818 cu
->language
= language_ada
;
19820 case DW_LANG_Modula2
:
19821 cu
->language
= language_m2
;
19823 case DW_LANG_Pascal83
:
19824 cu
->language
= language_pascal
;
19827 cu
->language
= language_objc
;
19830 case DW_LANG_Rust_old
:
19831 cu
->language
= language_rust
;
19833 case DW_LANG_Cobol74
:
19834 case DW_LANG_Cobol85
:
19836 cu
->language
= language_minimal
;
19839 cu
->language_defn
= language_def (cu
->language
);
19842 /* Return the named attribute or NULL if not there. */
19844 static struct attribute
*
19845 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19850 struct attribute
*spec
= NULL
;
19852 for (i
= 0; i
< die
->num_attrs
; ++i
)
19854 if (die
->attrs
[i
].name
== name
)
19855 return &die
->attrs
[i
];
19856 if (die
->attrs
[i
].name
== DW_AT_specification
19857 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19858 spec
= &die
->attrs
[i
];
19864 die
= follow_die_ref (die
, spec
, &cu
);
19870 /* Return the named attribute or NULL if not there,
19871 but do not follow DW_AT_specification, etc.
19872 This is for use in contexts where we're reading .debug_types dies.
19873 Following DW_AT_specification, DW_AT_abstract_origin will take us
19874 back up the chain, and we want to go down. */
19876 static struct attribute
*
19877 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19881 for (i
= 0; i
< die
->num_attrs
; ++i
)
19882 if (die
->attrs
[i
].name
== name
)
19883 return &die
->attrs
[i
];
19888 /* Return the string associated with a string-typed attribute, or NULL if it
19889 is either not found or is of an incorrect type. */
19891 static const char *
19892 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19894 struct attribute
*attr
;
19895 const char *str
= NULL
;
19897 attr
= dwarf2_attr (die
, name
, cu
);
19901 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19902 || attr
->form
== DW_FORM_string
19903 || attr
->form
== DW_FORM_GNU_str_index
19904 || attr
->form
== DW_FORM_GNU_strp_alt
)
19905 str
= DW_STRING (attr
);
19907 complaint (&symfile_complaints
,
19908 _("string type expected for attribute %s for "
19909 "DIE at %s in module %s"),
19910 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19911 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19917 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19918 and holds a non-zero value. This function should only be used for
19919 DW_FORM_flag or DW_FORM_flag_present attributes. */
19922 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19924 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19926 return (attr
&& DW_UNSND (attr
));
19930 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19932 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19933 which value is non-zero. However, we have to be careful with
19934 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19935 (via dwarf2_flag_true_p) follows this attribute. So we may
19936 end up accidently finding a declaration attribute that belongs
19937 to a different DIE referenced by the specification attribute,
19938 even though the given DIE does not have a declaration attribute. */
19939 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19940 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19943 /* Return the die giving the specification for DIE, if there is
19944 one. *SPEC_CU is the CU containing DIE on input, and the CU
19945 containing the return value on output. If there is no
19946 specification, but there is an abstract origin, that is
19949 static struct die_info
*
19950 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19952 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19955 if (spec_attr
== NULL
)
19956 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19958 if (spec_attr
== NULL
)
19961 return follow_die_ref (die
, spec_attr
, spec_cu
);
19964 /* Stub for free_line_header to match void * callback types. */
19967 free_line_header_voidp (void *arg
)
19969 struct line_header
*lh
= (struct line_header
*) arg
;
19975 line_header::add_include_dir (const char *include_dir
)
19977 if (dwarf_line_debug
>= 2)
19978 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19979 include_dirs
.size () + 1, include_dir
);
19981 include_dirs
.push_back (include_dir
);
19985 line_header::add_file_name (const char *name
,
19987 unsigned int mod_time
,
19988 unsigned int length
)
19990 if (dwarf_line_debug
>= 2)
19991 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19992 (unsigned) file_names
.size () + 1, name
);
19994 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19997 /* A convenience function to find the proper .debug_line section for a CU. */
19999 static struct dwarf2_section_info
*
20000 get_debug_line_section (struct dwarf2_cu
*cu
)
20002 struct dwarf2_section_info
*section
;
20003 struct dwarf2_per_objfile
*dwarf2_per_objfile
20004 = cu
->per_cu
->dwarf2_per_objfile
;
20006 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20008 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20009 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20010 else if (cu
->per_cu
->is_dwz
)
20012 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20014 section
= &dwz
->line
;
20017 section
= &dwarf2_per_objfile
->line
;
20022 /* Read directory or file name entry format, starting with byte of
20023 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20024 entries count and the entries themselves in the described entry
20028 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20029 bfd
*abfd
, const gdb_byte
**bufp
,
20030 struct line_header
*lh
,
20031 const struct comp_unit_head
*cu_header
,
20032 void (*callback
) (struct line_header
*lh
,
20035 unsigned int mod_time
,
20036 unsigned int length
))
20038 gdb_byte format_count
, formati
;
20039 ULONGEST data_count
, datai
;
20040 const gdb_byte
*buf
= *bufp
;
20041 const gdb_byte
*format_header_data
;
20042 unsigned int bytes_read
;
20044 format_count
= read_1_byte (abfd
, buf
);
20046 format_header_data
= buf
;
20047 for (formati
= 0; formati
< format_count
; formati
++)
20049 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20051 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20055 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20057 for (datai
= 0; datai
< data_count
; datai
++)
20059 const gdb_byte
*format
= format_header_data
;
20060 struct file_entry fe
;
20062 for (formati
= 0; formati
< format_count
; formati
++)
20064 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20065 format
+= bytes_read
;
20067 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20068 format
+= bytes_read
;
20070 gdb::optional
<const char *> string
;
20071 gdb::optional
<unsigned int> uint
;
20075 case DW_FORM_string
:
20076 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20080 case DW_FORM_line_strp
:
20081 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20088 case DW_FORM_data1
:
20089 uint
.emplace (read_1_byte (abfd
, buf
));
20093 case DW_FORM_data2
:
20094 uint
.emplace (read_2_bytes (abfd
, buf
));
20098 case DW_FORM_data4
:
20099 uint
.emplace (read_4_bytes (abfd
, buf
));
20103 case DW_FORM_data8
:
20104 uint
.emplace (read_8_bytes (abfd
, buf
));
20108 case DW_FORM_udata
:
20109 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20113 case DW_FORM_block
:
20114 /* It is valid only for DW_LNCT_timestamp which is ignored by
20119 switch (content_type
)
20122 if (string
.has_value ())
20125 case DW_LNCT_directory_index
:
20126 if (uint
.has_value ())
20127 fe
.d_index
= (dir_index
) *uint
;
20129 case DW_LNCT_timestamp
:
20130 if (uint
.has_value ())
20131 fe
.mod_time
= *uint
;
20134 if (uint
.has_value ())
20140 complaint (&symfile_complaints
,
20141 _("Unknown format content type %s"),
20142 pulongest (content_type
));
20146 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20152 /* Read the statement program header starting at OFFSET in
20153 .debug_line, or .debug_line.dwo. Return a pointer
20154 to a struct line_header, allocated using xmalloc.
20155 Returns NULL if there is a problem reading the header, e.g., if it
20156 has a version we don't understand.
20158 NOTE: the strings in the include directory and file name tables of
20159 the returned object point into the dwarf line section buffer,
20160 and must not be freed. */
20162 static line_header_up
20163 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20165 const gdb_byte
*line_ptr
;
20166 unsigned int bytes_read
, offset_size
;
20168 const char *cur_dir
, *cur_file
;
20169 struct dwarf2_section_info
*section
;
20171 struct dwarf2_per_objfile
*dwarf2_per_objfile
20172 = cu
->per_cu
->dwarf2_per_objfile
;
20174 section
= get_debug_line_section (cu
);
20175 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20176 if (section
->buffer
== NULL
)
20178 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20179 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20181 complaint (&symfile_complaints
, _("missing .debug_line section"));
20185 /* We can't do this until we know the section is non-empty.
20186 Only then do we know we have such a section. */
20187 abfd
= get_section_bfd_owner (section
);
20189 /* Make sure that at least there's room for the total_length field.
20190 That could be 12 bytes long, but we're just going to fudge that. */
20191 if (to_underlying (sect_off
) + 4 >= section
->size
)
20193 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20197 line_header_up
lh (new line_header ());
20199 lh
->sect_off
= sect_off
;
20200 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20202 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20204 /* Read in the header. */
20206 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20207 &bytes_read
, &offset_size
);
20208 line_ptr
+= bytes_read
;
20209 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20211 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20214 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20215 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20217 if (lh
->version
> 5)
20219 /* This is a version we don't understand. The format could have
20220 changed in ways we don't handle properly so just punt. */
20221 complaint (&symfile_complaints
,
20222 _("unsupported version in .debug_line section"));
20225 if (lh
->version
>= 5)
20227 gdb_byte segment_selector_size
;
20229 /* Skip address size. */
20230 read_1_byte (abfd
, line_ptr
);
20233 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20235 if (segment_selector_size
!= 0)
20237 complaint (&symfile_complaints
,
20238 _("unsupported segment selector size %u "
20239 "in .debug_line section"),
20240 segment_selector_size
);
20244 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20245 line_ptr
+= offset_size
;
20246 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20248 if (lh
->version
>= 4)
20250 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20254 lh
->maximum_ops_per_instruction
= 1;
20256 if (lh
->maximum_ops_per_instruction
== 0)
20258 lh
->maximum_ops_per_instruction
= 1;
20259 complaint (&symfile_complaints
,
20260 _("invalid maximum_ops_per_instruction "
20261 "in `.debug_line' section"));
20264 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20266 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20268 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20270 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20272 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20274 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20275 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20277 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20281 if (lh
->version
>= 5)
20283 /* Read directory table. */
20284 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20286 [] (struct line_header
*lh
, const char *name
,
20287 dir_index d_index
, unsigned int mod_time
,
20288 unsigned int length
)
20290 lh
->add_include_dir (name
);
20293 /* Read file name table. */
20294 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20296 [] (struct line_header
*lh
, const char *name
,
20297 dir_index d_index
, unsigned int mod_time
,
20298 unsigned int length
)
20300 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20305 /* Read directory table. */
20306 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20308 line_ptr
+= bytes_read
;
20309 lh
->add_include_dir (cur_dir
);
20311 line_ptr
+= bytes_read
;
20313 /* Read file name table. */
20314 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20316 unsigned int mod_time
, length
;
20319 line_ptr
+= bytes_read
;
20320 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20321 line_ptr
+= bytes_read
;
20322 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20323 line_ptr
+= bytes_read
;
20324 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20325 line_ptr
+= bytes_read
;
20327 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20329 line_ptr
+= bytes_read
;
20331 lh
->statement_program_start
= line_ptr
;
20333 if (line_ptr
> (section
->buffer
+ section
->size
))
20334 complaint (&symfile_complaints
,
20335 _("line number info header doesn't "
20336 "fit in `.debug_line' section"));
20341 /* Subroutine of dwarf_decode_lines to simplify it.
20342 Return the file name of the psymtab for included file FILE_INDEX
20343 in line header LH of PST.
20344 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20345 If space for the result is malloc'd, *NAME_HOLDER will be set.
20346 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20348 static const char *
20349 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20350 const struct partial_symtab
*pst
,
20351 const char *comp_dir
,
20352 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20354 const file_entry
&fe
= lh
->file_names
[file_index
];
20355 const char *include_name
= fe
.name
;
20356 const char *include_name_to_compare
= include_name
;
20357 const char *pst_filename
;
20360 const char *dir_name
= fe
.include_dir (lh
);
20362 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20363 if (!IS_ABSOLUTE_PATH (include_name
)
20364 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20366 /* Avoid creating a duplicate psymtab for PST.
20367 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20368 Before we do the comparison, however, we need to account
20369 for DIR_NAME and COMP_DIR.
20370 First prepend dir_name (if non-NULL). If we still don't
20371 have an absolute path prepend comp_dir (if non-NULL).
20372 However, the directory we record in the include-file's
20373 psymtab does not contain COMP_DIR (to match the
20374 corresponding symtab(s)).
20379 bash$ gcc -g ./hello.c
20380 include_name = "hello.c"
20382 DW_AT_comp_dir = comp_dir = "/tmp"
20383 DW_AT_name = "./hello.c"
20387 if (dir_name
!= NULL
)
20389 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20390 include_name
, (char *) NULL
));
20391 include_name
= name_holder
->get ();
20392 include_name_to_compare
= include_name
;
20394 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20396 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20397 include_name
, (char *) NULL
));
20398 include_name_to_compare
= hold_compare
.get ();
20402 pst_filename
= pst
->filename
;
20403 gdb::unique_xmalloc_ptr
<char> copied_name
;
20404 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20406 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20407 pst_filename
, (char *) NULL
));
20408 pst_filename
= copied_name
.get ();
20411 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20415 return include_name
;
20418 /* State machine to track the state of the line number program. */
20420 class lnp_state_machine
20423 /* Initialize a machine state for the start of a line number
20425 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20427 file_entry
*current_file ()
20429 /* lh->file_names is 0-based, but the file name numbers in the
20430 statement program are 1-based. */
20431 return m_line_header
->file_name_at (m_file
);
20434 /* Record the line in the state machine. END_SEQUENCE is true if
20435 we're processing the end of a sequence. */
20436 void record_line (bool end_sequence
);
20438 /* Check address and if invalid nop-out the rest of the lines in this
20440 void check_line_address (struct dwarf2_cu
*cu
,
20441 const gdb_byte
*line_ptr
,
20442 CORE_ADDR lowpc
, CORE_ADDR address
);
20444 void handle_set_discriminator (unsigned int discriminator
)
20446 m_discriminator
= discriminator
;
20447 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20450 /* Handle DW_LNE_set_address. */
20451 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20454 address
+= baseaddr
;
20455 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20458 /* Handle DW_LNS_advance_pc. */
20459 void handle_advance_pc (CORE_ADDR adjust
);
20461 /* Handle a special opcode. */
20462 void handle_special_opcode (unsigned char op_code
);
20464 /* Handle DW_LNS_advance_line. */
20465 void handle_advance_line (int line_delta
)
20467 advance_line (line_delta
);
20470 /* Handle DW_LNS_set_file. */
20471 void handle_set_file (file_name_index file
);
20473 /* Handle DW_LNS_negate_stmt. */
20474 void handle_negate_stmt ()
20476 m_is_stmt
= !m_is_stmt
;
20479 /* Handle DW_LNS_const_add_pc. */
20480 void handle_const_add_pc ();
20482 /* Handle DW_LNS_fixed_advance_pc. */
20483 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20485 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20489 /* Handle DW_LNS_copy. */
20490 void handle_copy ()
20492 record_line (false);
20493 m_discriminator
= 0;
20496 /* Handle DW_LNE_end_sequence. */
20497 void handle_end_sequence ()
20499 m_record_line_callback
= ::record_line
;
20503 /* Advance the line by LINE_DELTA. */
20504 void advance_line (int line_delta
)
20506 m_line
+= line_delta
;
20508 if (line_delta
!= 0)
20509 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20512 gdbarch
*m_gdbarch
;
20514 /* True if we're recording lines.
20515 Otherwise we're building partial symtabs and are just interested in
20516 finding include files mentioned by the line number program. */
20517 bool m_record_lines_p
;
20519 /* The line number header. */
20520 line_header
*m_line_header
;
20522 /* These are part of the standard DWARF line number state machine,
20523 and initialized according to the DWARF spec. */
20525 unsigned char m_op_index
= 0;
20526 /* The line table index (1-based) of the current file. */
20527 file_name_index m_file
= (file_name_index
) 1;
20528 unsigned int m_line
= 1;
20530 /* These are initialized in the constructor. */
20532 CORE_ADDR m_address
;
20534 unsigned int m_discriminator
;
20536 /* Additional bits of state we need to track. */
20538 /* The last file that we called dwarf2_start_subfile for.
20539 This is only used for TLLs. */
20540 unsigned int m_last_file
= 0;
20541 /* The last file a line number was recorded for. */
20542 struct subfile
*m_last_subfile
= NULL
;
20544 /* The function to call to record a line. */
20545 record_line_ftype
*m_record_line_callback
= NULL
;
20547 /* The last line number that was recorded, used to coalesce
20548 consecutive entries for the same line. This can happen, for
20549 example, when discriminators are present. PR 17276. */
20550 unsigned int m_last_line
= 0;
20551 bool m_line_has_non_zero_discriminator
= false;
20555 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20557 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20558 / m_line_header
->maximum_ops_per_instruction
)
20559 * m_line_header
->minimum_instruction_length
);
20560 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20561 m_op_index
= ((m_op_index
+ adjust
)
20562 % m_line_header
->maximum_ops_per_instruction
);
20566 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20568 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20569 CORE_ADDR addr_adj
= (((m_op_index
20570 + (adj_opcode
/ m_line_header
->line_range
))
20571 / m_line_header
->maximum_ops_per_instruction
)
20572 * m_line_header
->minimum_instruction_length
);
20573 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20574 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20575 % m_line_header
->maximum_ops_per_instruction
);
20577 int line_delta
= (m_line_header
->line_base
20578 + (adj_opcode
% m_line_header
->line_range
));
20579 advance_line (line_delta
);
20580 record_line (false);
20581 m_discriminator
= 0;
20585 lnp_state_machine::handle_set_file (file_name_index file
)
20589 const file_entry
*fe
= current_file ();
20591 dwarf2_debug_line_missing_file_complaint ();
20592 else if (m_record_lines_p
)
20594 const char *dir
= fe
->include_dir (m_line_header
);
20596 m_last_subfile
= current_subfile
;
20597 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20598 dwarf2_start_subfile (fe
->name
, dir
);
20603 lnp_state_machine::handle_const_add_pc ()
20606 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20609 = (((m_op_index
+ adjust
)
20610 / m_line_header
->maximum_ops_per_instruction
)
20611 * m_line_header
->minimum_instruction_length
);
20613 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20614 m_op_index
= ((m_op_index
+ adjust
)
20615 % m_line_header
->maximum_ops_per_instruction
);
20618 /* Ignore this record_line request. */
20621 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20626 /* Return non-zero if we should add LINE to the line number table.
20627 LINE is the line to add, LAST_LINE is the last line that was added,
20628 LAST_SUBFILE is the subfile for LAST_LINE.
20629 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20630 had a non-zero discriminator.
20632 We have to be careful in the presence of discriminators.
20633 E.g., for this line:
20635 for (i = 0; i < 100000; i++);
20637 clang can emit four line number entries for that one line,
20638 each with a different discriminator.
20639 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20641 However, we want gdb to coalesce all four entries into one.
20642 Otherwise the user could stepi into the middle of the line and
20643 gdb would get confused about whether the pc really was in the
20644 middle of the line.
20646 Things are further complicated by the fact that two consecutive
20647 line number entries for the same line is a heuristic used by gcc
20648 to denote the end of the prologue. So we can't just discard duplicate
20649 entries, we have to be selective about it. The heuristic we use is
20650 that we only collapse consecutive entries for the same line if at least
20651 one of those entries has a non-zero discriminator. PR 17276.
20653 Note: Addresses in the line number state machine can never go backwards
20654 within one sequence, thus this coalescing is ok. */
20657 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20658 int line_has_non_zero_discriminator
,
20659 struct subfile
*last_subfile
)
20661 if (current_subfile
!= last_subfile
)
20663 if (line
!= last_line
)
20665 /* Same line for the same file that we've seen already.
20666 As a last check, for pr 17276, only record the line if the line
20667 has never had a non-zero discriminator. */
20668 if (!line_has_non_zero_discriminator
)
20673 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20674 in the line table of subfile SUBFILE. */
20677 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20678 unsigned int line
, CORE_ADDR address
,
20679 record_line_ftype p_record_line
)
20681 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20683 if (dwarf_line_debug
)
20685 fprintf_unfiltered (gdb_stdlog
,
20686 "Recording line %u, file %s, address %s\n",
20687 line
, lbasename (subfile
->name
),
20688 paddress (gdbarch
, address
));
20691 (*p_record_line
) (subfile
, line
, addr
);
20694 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20695 Mark the end of a set of line number records.
20696 The arguments are the same as for dwarf_record_line_1.
20697 If SUBFILE is NULL the request is ignored. */
20700 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20701 CORE_ADDR address
, record_line_ftype p_record_line
)
20703 if (subfile
== NULL
)
20706 if (dwarf_line_debug
)
20708 fprintf_unfiltered (gdb_stdlog
,
20709 "Finishing current line, file %s, address %s\n",
20710 lbasename (subfile
->name
),
20711 paddress (gdbarch
, address
));
20714 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20718 lnp_state_machine::record_line (bool end_sequence
)
20720 if (dwarf_line_debug
)
20722 fprintf_unfiltered (gdb_stdlog
,
20723 "Processing actual line %u: file %u,"
20724 " address %s, is_stmt %u, discrim %u\n",
20725 m_line
, to_underlying (m_file
),
20726 paddress (m_gdbarch
, m_address
),
20727 m_is_stmt
, m_discriminator
);
20730 file_entry
*fe
= current_file ();
20733 dwarf2_debug_line_missing_file_complaint ();
20734 /* For now we ignore lines not starting on an instruction boundary.
20735 But not when processing end_sequence for compatibility with the
20736 previous version of the code. */
20737 else if (m_op_index
== 0 || end_sequence
)
20739 fe
->included_p
= 1;
20740 if (m_record_lines_p
&& m_is_stmt
)
20742 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20744 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20745 m_address
, m_record_line_callback
);
20750 if (dwarf_record_line_p (m_line
, m_last_line
,
20751 m_line_has_non_zero_discriminator
,
20754 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20756 m_record_line_callback
);
20758 m_last_subfile
= current_subfile
;
20759 m_last_line
= m_line
;
20765 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20766 bool record_lines_p
)
20769 m_record_lines_p
= record_lines_p
;
20770 m_line_header
= lh
;
20772 m_record_line_callback
= ::record_line
;
20774 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20775 was a line entry for it so that the backend has a chance to adjust it
20776 and also record it in case it needs it. This is currently used by MIPS
20777 code, cf. `mips_adjust_dwarf2_line'. */
20778 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20779 m_is_stmt
= lh
->default_is_stmt
;
20780 m_discriminator
= 0;
20784 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20785 const gdb_byte
*line_ptr
,
20786 CORE_ADDR lowpc
, CORE_ADDR address
)
20788 /* If address < lowpc then it's not a usable value, it's outside the
20789 pc range of the CU. However, we restrict the test to only address
20790 values of zero to preserve GDB's previous behaviour which is to
20791 handle the specific case of a function being GC'd by the linker. */
20793 if (address
== 0 && address
< lowpc
)
20795 /* This line table is for a function which has been
20796 GCd by the linker. Ignore it. PR gdb/12528 */
20798 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20799 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20801 complaint (&symfile_complaints
,
20802 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20803 line_offset
, objfile_name (objfile
));
20804 m_record_line_callback
= noop_record_line
;
20805 /* Note: record_line_callback is left as noop_record_line until
20806 we see DW_LNE_end_sequence. */
20810 /* Subroutine of dwarf_decode_lines to simplify it.
20811 Process the line number information in LH.
20812 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20813 program in order to set included_p for every referenced header. */
20816 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20817 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20819 const gdb_byte
*line_ptr
, *extended_end
;
20820 const gdb_byte
*line_end
;
20821 unsigned int bytes_read
, extended_len
;
20822 unsigned char op_code
, extended_op
;
20823 CORE_ADDR baseaddr
;
20824 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20825 bfd
*abfd
= objfile
->obfd
;
20826 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20827 /* True if we're recording line info (as opposed to building partial
20828 symtabs and just interested in finding include files mentioned by
20829 the line number program). */
20830 bool record_lines_p
= !decode_for_pst_p
;
20832 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20834 line_ptr
= lh
->statement_program_start
;
20835 line_end
= lh
->statement_program_end
;
20837 /* Read the statement sequences until there's nothing left. */
20838 while (line_ptr
< line_end
)
20840 /* The DWARF line number program state machine. Reset the state
20841 machine at the start of each sequence. */
20842 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20843 bool end_sequence
= false;
20845 if (record_lines_p
)
20847 /* Start a subfile for the current file of the state
20849 const file_entry
*fe
= state_machine
.current_file ();
20852 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20855 /* Decode the table. */
20856 while (line_ptr
< line_end
&& !end_sequence
)
20858 op_code
= read_1_byte (abfd
, line_ptr
);
20861 if (op_code
>= lh
->opcode_base
)
20863 /* Special opcode. */
20864 state_machine
.handle_special_opcode (op_code
);
20866 else switch (op_code
)
20868 case DW_LNS_extended_op
:
20869 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20871 line_ptr
+= bytes_read
;
20872 extended_end
= line_ptr
+ extended_len
;
20873 extended_op
= read_1_byte (abfd
, line_ptr
);
20875 switch (extended_op
)
20877 case DW_LNE_end_sequence
:
20878 state_machine
.handle_end_sequence ();
20879 end_sequence
= true;
20881 case DW_LNE_set_address
:
20884 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20885 line_ptr
+= bytes_read
;
20887 state_machine
.check_line_address (cu
, line_ptr
,
20889 state_machine
.handle_set_address (baseaddr
, address
);
20892 case DW_LNE_define_file
:
20894 const char *cur_file
;
20895 unsigned int mod_time
, length
;
20898 cur_file
= read_direct_string (abfd
, line_ptr
,
20900 line_ptr
+= bytes_read
;
20901 dindex
= (dir_index
)
20902 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20903 line_ptr
+= bytes_read
;
20905 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20906 line_ptr
+= bytes_read
;
20908 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20909 line_ptr
+= bytes_read
;
20910 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20913 case DW_LNE_set_discriminator
:
20915 /* The discriminator is not interesting to the
20916 debugger; just ignore it. We still need to
20917 check its value though:
20918 if there are consecutive entries for the same
20919 (non-prologue) line we want to coalesce them.
20922 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20923 line_ptr
+= bytes_read
;
20925 state_machine
.handle_set_discriminator (discr
);
20929 complaint (&symfile_complaints
,
20930 _("mangled .debug_line section"));
20933 /* Make sure that we parsed the extended op correctly. If e.g.
20934 we expected a different address size than the producer used,
20935 we may have read the wrong number of bytes. */
20936 if (line_ptr
!= extended_end
)
20938 complaint (&symfile_complaints
,
20939 _("mangled .debug_line section"));
20944 state_machine
.handle_copy ();
20946 case DW_LNS_advance_pc
:
20949 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20950 line_ptr
+= bytes_read
;
20952 state_machine
.handle_advance_pc (adjust
);
20955 case DW_LNS_advance_line
:
20958 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20959 line_ptr
+= bytes_read
;
20961 state_machine
.handle_advance_line (line_delta
);
20964 case DW_LNS_set_file
:
20966 file_name_index file
20967 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20969 line_ptr
+= bytes_read
;
20971 state_machine
.handle_set_file (file
);
20974 case DW_LNS_set_column
:
20975 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20976 line_ptr
+= bytes_read
;
20978 case DW_LNS_negate_stmt
:
20979 state_machine
.handle_negate_stmt ();
20981 case DW_LNS_set_basic_block
:
20983 /* Add to the address register of the state machine the
20984 address increment value corresponding to special opcode
20985 255. I.e., this value is scaled by the minimum
20986 instruction length since special opcode 255 would have
20987 scaled the increment. */
20988 case DW_LNS_const_add_pc
:
20989 state_machine
.handle_const_add_pc ();
20991 case DW_LNS_fixed_advance_pc
:
20993 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20996 state_machine
.handle_fixed_advance_pc (addr_adj
);
21001 /* Unknown standard opcode, ignore it. */
21004 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21006 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21007 line_ptr
+= bytes_read
;
21014 dwarf2_debug_line_missing_end_sequence_complaint ();
21016 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21017 in which case we still finish recording the last line). */
21018 state_machine
.record_line (true);
21022 /* Decode the Line Number Program (LNP) for the given line_header
21023 structure and CU. The actual information extracted and the type
21024 of structures created from the LNP depends on the value of PST.
21026 1. If PST is NULL, then this procedure uses the data from the program
21027 to create all necessary symbol tables, and their linetables.
21029 2. If PST is not NULL, this procedure reads the program to determine
21030 the list of files included by the unit represented by PST, and
21031 builds all the associated partial symbol tables.
21033 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21034 It is used for relative paths in the line table.
21035 NOTE: When processing partial symtabs (pst != NULL),
21036 comp_dir == pst->dirname.
21038 NOTE: It is important that psymtabs have the same file name (via strcmp)
21039 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21040 symtab we don't use it in the name of the psymtabs we create.
21041 E.g. expand_line_sal requires this when finding psymtabs to expand.
21042 A good testcase for this is mb-inline.exp.
21044 LOWPC is the lowest address in CU (or 0 if not known).
21046 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21047 for its PC<->lines mapping information. Otherwise only the filename
21048 table is read in. */
21051 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21052 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21053 CORE_ADDR lowpc
, int decode_mapping
)
21055 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21056 const int decode_for_pst_p
= (pst
!= NULL
);
21058 if (decode_mapping
)
21059 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21061 if (decode_for_pst_p
)
21065 /* Now that we're done scanning the Line Header Program, we can
21066 create the psymtab of each included file. */
21067 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21068 if (lh
->file_names
[file_index
].included_p
== 1)
21070 gdb::unique_xmalloc_ptr
<char> name_holder
;
21071 const char *include_name
=
21072 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21074 if (include_name
!= NULL
)
21075 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21080 /* Make sure a symtab is created for every file, even files
21081 which contain only variables (i.e. no code with associated
21083 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
21086 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21088 file_entry
&fe
= lh
->file_names
[i
];
21090 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
21092 if (current_subfile
->symtab
== NULL
)
21094 current_subfile
->symtab
21095 = allocate_symtab (cust
, current_subfile
->name
);
21097 fe
.symtab
= current_subfile
->symtab
;
21102 /* Start a subfile for DWARF. FILENAME is the name of the file and
21103 DIRNAME the name of the source directory which contains FILENAME
21104 or NULL if not known.
21105 This routine tries to keep line numbers from identical absolute and
21106 relative file names in a common subfile.
21108 Using the `list' example from the GDB testsuite, which resides in
21109 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21110 of /srcdir/list0.c yields the following debugging information for list0.c:
21112 DW_AT_name: /srcdir/list0.c
21113 DW_AT_comp_dir: /compdir
21114 files.files[0].name: list0.h
21115 files.files[0].dir: /srcdir
21116 files.files[1].name: list0.c
21117 files.files[1].dir: /srcdir
21119 The line number information for list0.c has to end up in a single
21120 subfile, so that `break /srcdir/list0.c:1' works as expected.
21121 start_subfile will ensure that this happens provided that we pass the
21122 concatenation of files.files[1].dir and files.files[1].name as the
21126 dwarf2_start_subfile (const char *filename
, const char *dirname
)
21130 /* In order not to lose the line information directory,
21131 we concatenate it to the filename when it makes sense.
21132 Note that the Dwarf3 standard says (speaking of filenames in line
21133 information): ``The directory index is ignored for file names
21134 that represent full path names''. Thus ignoring dirname in the
21135 `else' branch below isn't an issue. */
21137 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21139 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21143 start_subfile (filename
);
21149 /* Start a symtab for DWARF.
21150 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21152 static struct compunit_symtab
*
21153 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21154 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21156 struct compunit_symtab
*cust
21157 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21158 low_pc
, cu
->language
);
21160 record_debugformat ("DWARF 2");
21161 record_producer (cu
->producer
);
21163 /* We assume that we're processing GCC output. */
21164 processing_gcc_compilation
= 2;
21166 cu
->processing_has_namespace_info
= 0;
21172 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21173 struct dwarf2_cu
*cu
)
21175 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21176 struct comp_unit_head
*cu_header
= &cu
->header
;
21178 /* NOTE drow/2003-01-30: There used to be a comment and some special
21179 code here to turn a symbol with DW_AT_external and a
21180 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21181 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21182 with some versions of binutils) where shared libraries could have
21183 relocations against symbols in their debug information - the
21184 minimal symbol would have the right address, but the debug info
21185 would not. It's no longer necessary, because we will explicitly
21186 apply relocations when we read in the debug information now. */
21188 /* A DW_AT_location attribute with no contents indicates that a
21189 variable has been optimized away. */
21190 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21192 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21196 /* Handle one degenerate form of location expression specially, to
21197 preserve GDB's previous behavior when section offsets are
21198 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21199 then mark this symbol as LOC_STATIC. */
21201 if (attr_form_is_block (attr
)
21202 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21203 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21204 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21205 && (DW_BLOCK (attr
)->size
21206 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21208 unsigned int dummy
;
21210 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21211 SYMBOL_VALUE_ADDRESS (sym
) =
21212 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21214 SYMBOL_VALUE_ADDRESS (sym
) =
21215 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21216 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21217 fixup_symbol_section (sym
, objfile
);
21218 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21219 SYMBOL_SECTION (sym
));
21223 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21224 expression evaluator, and use LOC_COMPUTED only when necessary
21225 (i.e. when the value of a register or memory location is
21226 referenced, or a thread-local block, etc.). Then again, it might
21227 not be worthwhile. I'm assuming that it isn't unless performance
21228 or memory numbers show me otherwise. */
21230 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21232 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21233 cu
->has_loclist
= 1;
21236 /* Given a pointer to a DWARF information entry, figure out if we need
21237 to make a symbol table entry for it, and if so, create a new entry
21238 and return a pointer to it.
21239 If TYPE is NULL, determine symbol type from the die, otherwise
21240 used the passed type.
21241 If SPACE is not NULL, use it to hold the new symbol. If it is
21242 NULL, allocate a new symbol on the objfile's obstack. */
21244 static struct symbol
*
21245 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21246 struct symbol
*space
)
21248 struct dwarf2_per_objfile
*dwarf2_per_objfile
21249 = cu
->per_cu
->dwarf2_per_objfile
;
21250 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21251 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21252 struct symbol
*sym
= NULL
;
21254 struct attribute
*attr
= NULL
;
21255 struct attribute
*attr2
= NULL
;
21256 CORE_ADDR baseaddr
;
21257 struct pending
**list_to_add
= NULL
;
21259 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21261 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21263 name
= dwarf2_name (die
, cu
);
21266 const char *linkagename
;
21267 int suppress_add
= 0;
21272 sym
= allocate_symbol (objfile
);
21273 OBJSTAT (objfile
, n_syms
++);
21275 /* Cache this symbol's name and the name's demangled form (if any). */
21276 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21277 linkagename
= dwarf2_physname (name
, die
, cu
);
21278 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21280 /* Fortran does not have mangling standard and the mangling does differ
21281 between gfortran, iFort etc. */
21282 if (cu
->language
== language_fortran
21283 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21284 symbol_set_demangled_name (&(sym
->ginfo
),
21285 dwarf2_full_name (name
, die
, cu
),
21288 /* Default assumptions.
21289 Use the passed type or decode it from the die. */
21290 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21291 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21293 SYMBOL_TYPE (sym
) = type
;
21295 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21296 attr
= dwarf2_attr (die
,
21297 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21301 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21304 attr
= dwarf2_attr (die
,
21305 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21309 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21310 struct file_entry
*fe
;
21312 if (cu
->line_header
!= NULL
)
21313 fe
= cu
->line_header
->file_name_at (file_index
);
21318 complaint (&symfile_complaints
,
21319 _("file index out of range"));
21321 symbol_set_symtab (sym
, fe
->symtab
);
21327 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21332 addr
= attr_value_as_address (attr
);
21333 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21334 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21336 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21337 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21338 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21339 add_symbol_to_list (sym
, cu
->list_in_scope
);
21341 case DW_TAG_subprogram
:
21342 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21344 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21345 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21346 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21347 || cu
->language
== language_ada
)
21349 /* Subprograms marked external are stored as a global symbol.
21350 Ada subprograms, whether marked external or not, are always
21351 stored as a global symbol, because we want to be able to
21352 access them globally. For instance, we want to be able
21353 to break on a nested subprogram without having to
21354 specify the context. */
21355 list_to_add
= &global_symbols
;
21359 list_to_add
= cu
->list_in_scope
;
21362 case DW_TAG_inlined_subroutine
:
21363 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21365 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21366 SYMBOL_INLINED (sym
) = 1;
21367 list_to_add
= cu
->list_in_scope
;
21369 case DW_TAG_template_value_param
:
21371 /* Fall through. */
21372 case DW_TAG_constant
:
21373 case DW_TAG_variable
:
21374 case DW_TAG_member
:
21375 /* Compilation with minimal debug info may result in
21376 variables with missing type entries. Change the
21377 misleading `void' type to something sensible. */
21378 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21379 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21381 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21382 /* In the case of DW_TAG_member, we should only be called for
21383 static const members. */
21384 if (die
->tag
== DW_TAG_member
)
21386 /* dwarf2_add_field uses die_is_declaration,
21387 so we do the same. */
21388 gdb_assert (die_is_declaration (die
, cu
));
21393 dwarf2_const_value (attr
, sym
, cu
);
21394 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21397 if (attr2
&& (DW_UNSND (attr2
) != 0))
21398 list_to_add
= &global_symbols
;
21400 list_to_add
= cu
->list_in_scope
;
21404 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21407 var_decode_location (attr
, sym
, cu
);
21408 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21410 /* Fortran explicitly imports any global symbols to the local
21411 scope by DW_TAG_common_block. */
21412 if (cu
->language
== language_fortran
&& die
->parent
21413 && die
->parent
->tag
== DW_TAG_common_block
)
21416 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21417 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21418 && !dwarf2_per_objfile
->has_section_at_zero
)
21420 /* When a static variable is eliminated by the linker,
21421 the corresponding debug information is not stripped
21422 out, but the variable address is set to null;
21423 do not add such variables into symbol table. */
21425 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21427 /* Workaround gfortran PR debug/40040 - it uses
21428 DW_AT_location for variables in -fPIC libraries which may
21429 get overriden by other libraries/executable and get
21430 a different address. Resolve it by the minimal symbol
21431 which may come from inferior's executable using copy
21432 relocation. Make this workaround only for gfortran as for
21433 other compilers GDB cannot guess the minimal symbol
21434 Fortran mangling kind. */
21435 if (cu
->language
== language_fortran
&& die
->parent
21436 && die
->parent
->tag
== DW_TAG_module
21438 && startswith (cu
->producer
, "GNU Fortran"))
21439 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21441 /* A variable with DW_AT_external is never static,
21442 but it may be block-scoped. */
21443 list_to_add
= (cu
->list_in_scope
== &file_symbols
21444 ? &global_symbols
: cu
->list_in_scope
);
21447 list_to_add
= cu
->list_in_scope
;
21451 /* We do not know the address of this symbol.
21452 If it is an external symbol and we have type information
21453 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21454 The address of the variable will then be determined from
21455 the minimal symbol table whenever the variable is
21457 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21459 /* Fortran explicitly imports any global symbols to the local
21460 scope by DW_TAG_common_block. */
21461 if (cu
->language
== language_fortran
&& die
->parent
21462 && die
->parent
->tag
== DW_TAG_common_block
)
21464 /* SYMBOL_CLASS doesn't matter here because
21465 read_common_block is going to reset it. */
21467 list_to_add
= cu
->list_in_scope
;
21469 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21470 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21472 /* A variable with DW_AT_external is never static, but it
21473 may be block-scoped. */
21474 list_to_add
= (cu
->list_in_scope
== &file_symbols
21475 ? &global_symbols
: cu
->list_in_scope
);
21477 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21479 else if (!die_is_declaration (die
, cu
))
21481 /* Use the default LOC_OPTIMIZED_OUT class. */
21482 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21484 list_to_add
= cu
->list_in_scope
;
21488 case DW_TAG_formal_parameter
:
21489 /* If we are inside a function, mark this as an argument. If
21490 not, we might be looking at an argument to an inlined function
21491 when we do not have enough information to show inlined frames;
21492 pretend it's a local variable in that case so that the user can
21494 if (context_stack_depth
> 0
21495 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21496 SYMBOL_IS_ARGUMENT (sym
) = 1;
21497 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21500 var_decode_location (attr
, sym
, cu
);
21502 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21505 dwarf2_const_value (attr
, sym
, cu
);
21508 list_to_add
= cu
->list_in_scope
;
21510 case DW_TAG_unspecified_parameters
:
21511 /* From varargs functions; gdb doesn't seem to have any
21512 interest in this information, so just ignore it for now.
21515 case DW_TAG_template_type_param
:
21517 /* Fall through. */
21518 case DW_TAG_class_type
:
21519 case DW_TAG_interface_type
:
21520 case DW_TAG_structure_type
:
21521 case DW_TAG_union_type
:
21522 case DW_TAG_set_type
:
21523 case DW_TAG_enumeration_type
:
21524 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21525 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21528 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21529 really ever be static objects: otherwise, if you try
21530 to, say, break of a class's method and you're in a file
21531 which doesn't mention that class, it won't work unless
21532 the check for all static symbols in lookup_symbol_aux
21533 saves you. See the OtherFileClass tests in
21534 gdb.c++/namespace.exp. */
21538 list_to_add
= (cu
->list_in_scope
== &file_symbols
21539 && cu
->language
== language_cplus
21540 ? &global_symbols
: cu
->list_in_scope
);
21542 /* The semantics of C++ state that "struct foo {
21543 ... }" also defines a typedef for "foo". */
21544 if (cu
->language
== language_cplus
21545 || cu
->language
== language_ada
21546 || cu
->language
== language_d
21547 || cu
->language
== language_rust
)
21549 /* The symbol's name is already allocated along
21550 with this objfile, so we don't need to
21551 duplicate it for the type. */
21552 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21553 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21558 case DW_TAG_typedef
:
21559 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21560 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21561 list_to_add
= cu
->list_in_scope
;
21563 case DW_TAG_base_type
:
21564 case DW_TAG_subrange_type
:
21565 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21566 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21567 list_to_add
= cu
->list_in_scope
;
21569 case DW_TAG_enumerator
:
21570 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21573 dwarf2_const_value (attr
, sym
, cu
);
21576 /* NOTE: carlton/2003-11-10: See comment above in the
21577 DW_TAG_class_type, etc. block. */
21579 list_to_add
= (cu
->list_in_scope
== &file_symbols
21580 && cu
->language
== language_cplus
21581 ? &global_symbols
: cu
->list_in_scope
);
21584 case DW_TAG_imported_declaration
:
21585 case DW_TAG_namespace
:
21586 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21587 list_to_add
= &global_symbols
;
21589 case DW_TAG_module
:
21590 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21591 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21592 list_to_add
= &global_symbols
;
21594 case DW_TAG_common_block
:
21595 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21596 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21597 add_symbol_to_list (sym
, cu
->list_in_scope
);
21600 /* Not a tag we recognize. Hopefully we aren't processing
21601 trash data, but since we must specifically ignore things
21602 we don't recognize, there is nothing else we should do at
21604 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21605 dwarf_tag_name (die
->tag
));
21611 sym
->hash_next
= objfile
->template_symbols
;
21612 objfile
->template_symbols
= sym
;
21613 list_to_add
= NULL
;
21616 if (list_to_add
!= NULL
)
21617 add_symbol_to_list (sym
, list_to_add
);
21619 /* For the benefit of old versions of GCC, check for anonymous
21620 namespaces based on the demangled name. */
21621 if (!cu
->processing_has_namespace_info
21622 && cu
->language
== language_cplus
)
21623 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21628 /* Given an attr with a DW_FORM_dataN value in host byte order,
21629 zero-extend it as appropriate for the symbol's type. The DWARF
21630 standard (v4) is not entirely clear about the meaning of using
21631 DW_FORM_dataN for a constant with a signed type, where the type is
21632 wider than the data. The conclusion of a discussion on the DWARF
21633 list was that this is unspecified. We choose to always zero-extend
21634 because that is the interpretation long in use by GCC. */
21637 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21638 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21640 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21641 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21642 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21643 LONGEST l
= DW_UNSND (attr
);
21645 if (bits
< sizeof (*value
) * 8)
21647 l
&= ((LONGEST
) 1 << bits
) - 1;
21650 else if (bits
== sizeof (*value
) * 8)
21654 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21655 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21662 /* Read a constant value from an attribute. Either set *VALUE, or if
21663 the value does not fit in *VALUE, set *BYTES - either already
21664 allocated on the objfile obstack, or newly allocated on OBSTACK,
21665 or, set *BATON, if we translated the constant to a location
21669 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21670 const char *name
, struct obstack
*obstack
,
21671 struct dwarf2_cu
*cu
,
21672 LONGEST
*value
, const gdb_byte
**bytes
,
21673 struct dwarf2_locexpr_baton
**baton
)
21675 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21676 struct comp_unit_head
*cu_header
= &cu
->header
;
21677 struct dwarf_block
*blk
;
21678 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21679 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21685 switch (attr
->form
)
21688 case DW_FORM_GNU_addr_index
:
21692 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21693 dwarf2_const_value_length_mismatch_complaint (name
,
21694 cu_header
->addr_size
,
21695 TYPE_LENGTH (type
));
21696 /* Symbols of this form are reasonably rare, so we just
21697 piggyback on the existing location code rather than writing
21698 a new implementation of symbol_computed_ops. */
21699 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21700 (*baton
)->per_cu
= cu
->per_cu
;
21701 gdb_assert ((*baton
)->per_cu
);
21703 (*baton
)->size
= 2 + cu_header
->addr_size
;
21704 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21705 (*baton
)->data
= data
;
21707 data
[0] = DW_OP_addr
;
21708 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21709 byte_order
, DW_ADDR (attr
));
21710 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21713 case DW_FORM_string
:
21715 case DW_FORM_GNU_str_index
:
21716 case DW_FORM_GNU_strp_alt
:
21717 /* DW_STRING is already allocated on the objfile obstack, point
21719 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21721 case DW_FORM_block1
:
21722 case DW_FORM_block2
:
21723 case DW_FORM_block4
:
21724 case DW_FORM_block
:
21725 case DW_FORM_exprloc
:
21726 case DW_FORM_data16
:
21727 blk
= DW_BLOCK (attr
);
21728 if (TYPE_LENGTH (type
) != blk
->size
)
21729 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21730 TYPE_LENGTH (type
));
21731 *bytes
= blk
->data
;
21734 /* The DW_AT_const_value attributes are supposed to carry the
21735 symbol's value "represented as it would be on the target
21736 architecture." By the time we get here, it's already been
21737 converted to host endianness, so we just need to sign- or
21738 zero-extend it as appropriate. */
21739 case DW_FORM_data1
:
21740 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21742 case DW_FORM_data2
:
21743 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21745 case DW_FORM_data4
:
21746 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21748 case DW_FORM_data8
:
21749 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21752 case DW_FORM_sdata
:
21753 case DW_FORM_implicit_const
:
21754 *value
= DW_SND (attr
);
21757 case DW_FORM_udata
:
21758 *value
= DW_UNSND (attr
);
21762 complaint (&symfile_complaints
,
21763 _("unsupported const value attribute form: '%s'"),
21764 dwarf_form_name (attr
->form
));
21771 /* Copy constant value from an attribute to a symbol. */
21774 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21775 struct dwarf2_cu
*cu
)
21777 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21779 const gdb_byte
*bytes
;
21780 struct dwarf2_locexpr_baton
*baton
;
21782 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21783 SYMBOL_PRINT_NAME (sym
),
21784 &objfile
->objfile_obstack
, cu
,
21785 &value
, &bytes
, &baton
);
21789 SYMBOL_LOCATION_BATON (sym
) = baton
;
21790 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21792 else if (bytes
!= NULL
)
21794 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21795 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21799 SYMBOL_VALUE (sym
) = value
;
21800 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21804 /* Return the type of the die in question using its DW_AT_type attribute. */
21806 static struct type
*
21807 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21809 struct attribute
*type_attr
;
21811 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21814 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21815 /* A missing DW_AT_type represents a void type. */
21816 return objfile_type (objfile
)->builtin_void
;
21819 return lookup_die_type (die
, type_attr
, cu
);
21822 /* True iff CU's producer generates GNAT Ada auxiliary information
21823 that allows to find parallel types through that information instead
21824 of having to do expensive parallel lookups by type name. */
21827 need_gnat_info (struct dwarf2_cu
*cu
)
21829 /* Assume that the Ada compiler was GNAT, which always produces
21830 the auxiliary information. */
21831 return (cu
->language
== language_ada
);
21834 /* Return the auxiliary type of the die in question using its
21835 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21836 attribute is not present. */
21838 static struct type
*
21839 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21841 struct attribute
*type_attr
;
21843 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21847 return lookup_die_type (die
, type_attr
, cu
);
21850 /* If DIE has a descriptive_type attribute, then set the TYPE's
21851 descriptive type accordingly. */
21854 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21855 struct dwarf2_cu
*cu
)
21857 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21859 if (descriptive_type
)
21861 ALLOCATE_GNAT_AUX_TYPE (type
);
21862 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21866 /* Return the containing type of the die in question using its
21867 DW_AT_containing_type attribute. */
21869 static struct type
*
21870 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21872 struct attribute
*type_attr
;
21873 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21875 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21877 error (_("Dwarf Error: Problem turning containing type into gdb type "
21878 "[in module %s]"), objfile_name (objfile
));
21880 return lookup_die_type (die
, type_attr
, cu
);
21883 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21885 static struct type
*
21886 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21888 struct dwarf2_per_objfile
*dwarf2_per_objfile
21889 = cu
->per_cu
->dwarf2_per_objfile
;
21890 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21891 char *message
, *saved
;
21893 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21894 objfile_name (objfile
),
21895 sect_offset_str (cu
->header
.sect_off
),
21896 sect_offset_str (die
->sect_off
));
21897 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21898 message
, strlen (message
));
21901 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21904 /* Look up the type of DIE in CU using its type attribute ATTR.
21905 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21906 DW_AT_containing_type.
21907 If there is no type substitute an error marker. */
21909 static struct type
*
21910 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21911 struct dwarf2_cu
*cu
)
21913 struct dwarf2_per_objfile
*dwarf2_per_objfile
21914 = cu
->per_cu
->dwarf2_per_objfile
;
21915 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21916 struct type
*this_type
;
21918 gdb_assert (attr
->name
== DW_AT_type
21919 || attr
->name
== DW_AT_GNAT_descriptive_type
21920 || attr
->name
== DW_AT_containing_type
);
21922 /* First see if we have it cached. */
21924 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21926 struct dwarf2_per_cu_data
*per_cu
;
21927 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21929 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21930 dwarf2_per_objfile
);
21931 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21933 else if (attr_form_is_ref (attr
))
21935 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21937 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21939 else if (attr
->form
== DW_FORM_ref_sig8
)
21941 ULONGEST signature
= DW_SIGNATURE (attr
);
21943 return get_signatured_type (die
, signature
, cu
);
21947 complaint (&symfile_complaints
,
21948 _("Dwarf Error: Bad type attribute %s in DIE"
21949 " at %s [in module %s]"),
21950 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21951 objfile_name (objfile
));
21952 return build_error_marker_type (cu
, die
);
21955 /* If not cached we need to read it in. */
21957 if (this_type
== NULL
)
21959 struct die_info
*type_die
= NULL
;
21960 struct dwarf2_cu
*type_cu
= cu
;
21962 if (attr_form_is_ref (attr
))
21963 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21964 if (type_die
== NULL
)
21965 return build_error_marker_type (cu
, die
);
21966 /* If we find the type now, it's probably because the type came
21967 from an inter-CU reference and the type's CU got expanded before
21969 this_type
= read_type_die (type_die
, type_cu
);
21972 /* If we still don't have a type use an error marker. */
21974 if (this_type
== NULL
)
21975 return build_error_marker_type (cu
, die
);
21980 /* Return the type in DIE, CU.
21981 Returns NULL for invalid types.
21983 This first does a lookup in die_type_hash,
21984 and only reads the die in if necessary.
21986 NOTE: This can be called when reading in partial or full symbols. */
21988 static struct type
*
21989 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21991 struct type
*this_type
;
21993 this_type
= get_die_type (die
, cu
);
21997 return read_type_die_1 (die
, cu
);
22000 /* Read the type in DIE, CU.
22001 Returns NULL for invalid types. */
22003 static struct type
*
22004 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22006 struct type
*this_type
= NULL
;
22010 case DW_TAG_class_type
:
22011 case DW_TAG_interface_type
:
22012 case DW_TAG_structure_type
:
22013 case DW_TAG_union_type
:
22014 this_type
= read_structure_type (die
, cu
);
22016 case DW_TAG_enumeration_type
:
22017 this_type
= read_enumeration_type (die
, cu
);
22019 case DW_TAG_subprogram
:
22020 case DW_TAG_subroutine_type
:
22021 case DW_TAG_inlined_subroutine
:
22022 this_type
= read_subroutine_type (die
, cu
);
22024 case DW_TAG_array_type
:
22025 this_type
= read_array_type (die
, cu
);
22027 case DW_TAG_set_type
:
22028 this_type
= read_set_type (die
, cu
);
22030 case DW_TAG_pointer_type
:
22031 this_type
= read_tag_pointer_type (die
, cu
);
22033 case DW_TAG_ptr_to_member_type
:
22034 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22036 case DW_TAG_reference_type
:
22037 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22039 case DW_TAG_rvalue_reference_type
:
22040 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22042 case DW_TAG_const_type
:
22043 this_type
= read_tag_const_type (die
, cu
);
22045 case DW_TAG_volatile_type
:
22046 this_type
= read_tag_volatile_type (die
, cu
);
22048 case DW_TAG_restrict_type
:
22049 this_type
= read_tag_restrict_type (die
, cu
);
22051 case DW_TAG_string_type
:
22052 this_type
= read_tag_string_type (die
, cu
);
22054 case DW_TAG_typedef
:
22055 this_type
= read_typedef (die
, cu
);
22057 case DW_TAG_subrange_type
:
22058 this_type
= read_subrange_type (die
, cu
);
22060 case DW_TAG_base_type
:
22061 this_type
= read_base_type (die
, cu
);
22063 case DW_TAG_unspecified_type
:
22064 this_type
= read_unspecified_type (die
, cu
);
22066 case DW_TAG_namespace
:
22067 this_type
= read_namespace_type (die
, cu
);
22069 case DW_TAG_module
:
22070 this_type
= read_module_type (die
, cu
);
22072 case DW_TAG_atomic_type
:
22073 this_type
= read_tag_atomic_type (die
, cu
);
22076 complaint (&symfile_complaints
,
22077 _("unexpected tag in read_type_die: '%s'"),
22078 dwarf_tag_name (die
->tag
));
22085 /* See if we can figure out if the class lives in a namespace. We do
22086 this by looking for a member function; its demangled name will
22087 contain namespace info, if there is any.
22088 Return the computed name or NULL.
22089 Space for the result is allocated on the objfile's obstack.
22090 This is the full-die version of guess_partial_die_structure_name.
22091 In this case we know DIE has no useful parent. */
22094 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22096 struct die_info
*spec_die
;
22097 struct dwarf2_cu
*spec_cu
;
22098 struct die_info
*child
;
22099 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22102 spec_die
= die_specification (die
, &spec_cu
);
22103 if (spec_die
!= NULL
)
22109 for (child
= die
->child
;
22111 child
= child
->sibling
)
22113 if (child
->tag
== DW_TAG_subprogram
)
22115 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22117 if (linkage_name
!= NULL
)
22120 = language_class_name_from_physname (cu
->language_defn
,
22124 if (actual_name
!= NULL
)
22126 const char *die_name
= dwarf2_name (die
, cu
);
22128 if (die_name
!= NULL
22129 && strcmp (die_name
, actual_name
) != 0)
22131 /* Strip off the class name from the full name.
22132 We want the prefix. */
22133 int die_name_len
= strlen (die_name
);
22134 int actual_name_len
= strlen (actual_name
);
22136 /* Test for '::' as a sanity check. */
22137 if (actual_name_len
> die_name_len
+ 2
22138 && actual_name
[actual_name_len
22139 - die_name_len
- 1] == ':')
22140 name
= (char *) obstack_copy0 (
22141 &objfile
->per_bfd
->storage_obstack
,
22142 actual_name
, actual_name_len
- die_name_len
- 2);
22145 xfree (actual_name
);
22154 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22155 prefix part in such case. See
22156 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22158 static const char *
22159 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22161 struct attribute
*attr
;
22164 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22165 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22168 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22171 attr
= dw2_linkage_name_attr (die
, cu
);
22172 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22175 /* dwarf2_name had to be already called. */
22176 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22178 /* Strip the base name, keep any leading namespaces/classes. */
22179 base
= strrchr (DW_STRING (attr
), ':');
22180 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22183 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22184 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22186 &base
[-1] - DW_STRING (attr
));
22189 /* Return the name of the namespace/class that DIE is defined within,
22190 or "" if we can't tell. The caller should not xfree the result.
22192 For example, if we're within the method foo() in the following
22202 then determine_prefix on foo's die will return "N::C". */
22204 static const char *
22205 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22207 struct dwarf2_per_objfile
*dwarf2_per_objfile
22208 = cu
->per_cu
->dwarf2_per_objfile
;
22209 struct die_info
*parent
, *spec_die
;
22210 struct dwarf2_cu
*spec_cu
;
22211 struct type
*parent_type
;
22212 const char *retval
;
22214 if (cu
->language
!= language_cplus
22215 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22216 && cu
->language
!= language_rust
)
22219 retval
= anonymous_struct_prefix (die
, cu
);
22223 /* We have to be careful in the presence of DW_AT_specification.
22224 For example, with GCC 3.4, given the code
22228 // Definition of N::foo.
22232 then we'll have a tree of DIEs like this:
22234 1: DW_TAG_compile_unit
22235 2: DW_TAG_namespace // N
22236 3: DW_TAG_subprogram // declaration of N::foo
22237 4: DW_TAG_subprogram // definition of N::foo
22238 DW_AT_specification // refers to die #3
22240 Thus, when processing die #4, we have to pretend that we're in
22241 the context of its DW_AT_specification, namely the contex of die
22244 spec_die
= die_specification (die
, &spec_cu
);
22245 if (spec_die
== NULL
)
22246 parent
= die
->parent
;
22249 parent
= spec_die
->parent
;
22253 if (parent
== NULL
)
22255 else if (parent
->building_fullname
)
22258 const char *parent_name
;
22260 /* It has been seen on RealView 2.2 built binaries,
22261 DW_TAG_template_type_param types actually _defined_ as
22262 children of the parent class:
22265 template class <class Enum> Class{};
22266 Class<enum E> class_e;
22268 1: DW_TAG_class_type (Class)
22269 2: DW_TAG_enumeration_type (E)
22270 3: DW_TAG_enumerator (enum1:0)
22271 3: DW_TAG_enumerator (enum2:1)
22273 2: DW_TAG_template_type_param
22274 DW_AT_type DW_FORM_ref_udata (E)
22276 Besides being broken debug info, it can put GDB into an
22277 infinite loop. Consider:
22279 When we're building the full name for Class<E>, we'll start
22280 at Class, and go look over its template type parameters,
22281 finding E. We'll then try to build the full name of E, and
22282 reach here. We're now trying to build the full name of E,
22283 and look over the parent DIE for containing scope. In the
22284 broken case, if we followed the parent DIE of E, we'd again
22285 find Class, and once again go look at its template type
22286 arguments, etc., etc. Simply don't consider such parent die
22287 as source-level parent of this die (it can't be, the language
22288 doesn't allow it), and break the loop here. */
22289 name
= dwarf2_name (die
, cu
);
22290 parent_name
= dwarf2_name (parent
, cu
);
22291 complaint (&symfile_complaints
,
22292 _("template param type '%s' defined within parent '%s'"),
22293 name
? name
: "<unknown>",
22294 parent_name
? parent_name
: "<unknown>");
22298 switch (parent
->tag
)
22300 case DW_TAG_namespace
:
22301 parent_type
= read_type_die (parent
, cu
);
22302 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22303 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22304 Work around this problem here. */
22305 if (cu
->language
== language_cplus
22306 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22308 /* We give a name to even anonymous namespaces. */
22309 return TYPE_TAG_NAME (parent_type
);
22310 case DW_TAG_class_type
:
22311 case DW_TAG_interface_type
:
22312 case DW_TAG_structure_type
:
22313 case DW_TAG_union_type
:
22314 case DW_TAG_module
:
22315 parent_type
= read_type_die (parent
, cu
);
22316 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22317 return TYPE_TAG_NAME (parent_type
);
22319 /* An anonymous structure is only allowed non-static data
22320 members; no typedefs, no member functions, et cetera.
22321 So it does not need a prefix. */
22323 case DW_TAG_compile_unit
:
22324 case DW_TAG_partial_unit
:
22325 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22326 if (cu
->language
== language_cplus
22327 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22328 && die
->child
!= NULL
22329 && (die
->tag
== DW_TAG_class_type
22330 || die
->tag
== DW_TAG_structure_type
22331 || die
->tag
== DW_TAG_union_type
))
22333 char *name
= guess_full_die_structure_name (die
, cu
);
22338 case DW_TAG_enumeration_type
:
22339 parent_type
= read_type_die (parent
, cu
);
22340 if (TYPE_DECLARED_CLASS (parent_type
))
22342 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22343 return TYPE_TAG_NAME (parent_type
);
22346 /* Fall through. */
22348 return determine_prefix (parent
, cu
);
22352 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22353 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22354 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22355 an obconcat, otherwise allocate storage for the result. The CU argument is
22356 used to determine the language and hence, the appropriate separator. */
22358 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22361 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22362 int physname
, struct dwarf2_cu
*cu
)
22364 const char *lead
= "";
22367 if (suffix
== NULL
|| suffix
[0] == '\0'
22368 || prefix
== NULL
|| prefix
[0] == '\0')
22370 else if (cu
->language
== language_d
)
22372 /* For D, the 'main' function could be defined in any module, but it
22373 should never be prefixed. */
22374 if (strcmp (suffix
, "D main") == 0)
22382 else if (cu
->language
== language_fortran
&& physname
)
22384 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22385 DW_AT_MIPS_linkage_name is preferred and used instead. */
22393 if (prefix
== NULL
)
22395 if (suffix
== NULL
)
22402 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22404 strcpy (retval
, lead
);
22405 strcat (retval
, prefix
);
22406 strcat (retval
, sep
);
22407 strcat (retval
, suffix
);
22412 /* We have an obstack. */
22413 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22417 /* Return sibling of die, NULL if no sibling. */
22419 static struct die_info
*
22420 sibling_die (struct die_info
*die
)
22422 return die
->sibling
;
22425 /* Get name of a die, return NULL if not found. */
22427 static const char *
22428 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22429 struct obstack
*obstack
)
22431 if (name
&& cu
->language
== language_cplus
)
22433 std::string canon_name
= cp_canonicalize_string (name
);
22435 if (!canon_name
.empty ())
22437 if (canon_name
!= name
)
22438 name
= (const char *) obstack_copy0 (obstack
,
22439 canon_name
.c_str (),
22440 canon_name
.length ());
22447 /* Get name of a die, return NULL if not found.
22448 Anonymous namespaces are converted to their magic string. */
22450 static const char *
22451 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22453 struct attribute
*attr
;
22454 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22456 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22457 if ((!attr
|| !DW_STRING (attr
))
22458 && die
->tag
!= DW_TAG_namespace
22459 && die
->tag
!= DW_TAG_class_type
22460 && die
->tag
!= DW_TAG_interface_type
22461 && die
->tag
!= DW_TAG_structure_type
22462 && die
->tag
!= DW_TAG_union_type
)
22467 case DW_TAG_compile_unit
:
22468 case DW_TAG_partial_unit
:
22469 /* Compilation units have a DW_AT_name that is a filename, not
22470 a source language identifier. */
22471 case DW_TAG_enumeration_type
:
22472 case DW_TAG_enumerator
:
22473 /* These tags always have simple identifiers already; no need
22474 to canonicalize them. */
22475 return DW_STRING (attr
);
22477 case DW_TAG_namespace
:
22478 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22479 return DW_STRING (attr
);
22480 return CP_ANONYMOUS_NAMESPACE_STR
;
22482 case DW_TAG_class_type
:
22483 case DW_TAG_interface_type
:
22484 case DW_TAG_structure_type
:
22485 case DW_TAG_union_type
:
22486 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22487 structures or unions. These were of the form "._%d" in GCC 4.1,
22488 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22489 and GCC 4.4. We work around this problem by ignoring these. */
22490 if (attr
&& DW_STRING (attr
)
22491 && (startswith (DW_STRING (attr
), "._")
22492 || startswith (DW_STRING (attr
), "<anonymous")))
22495 /* GCC might emit a nameless typedef that has a linkage name. See
22496 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22497 if (!attr
|| DW_STRING (attr
) == NULL
)
22499 char *demangled
= NULL
;
22501 attr
= dw2_linkage_name_attr (die
, cu
);
22502 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22505 /* Avoid demangling DW_STRING (attr) the second time on a second
22506 call for the same DIE. */
22507 if (!DW_STRING_IS_CANONICAL (attr
))
22508 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22514 /* FIXME: we already did this for the partial symbol... */
22517 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22518 demangled
, strlen (demangled
)));
22519 DW_STRING_IS_CANONICAL (attr
) = 1;
22522 /* Strip any leading namespaces/classes, keep only the base name.
22523 DW_AT_name for named DIEs does not contain the prefixes. */
22524 base
= strrchr (DW_STRING (attr
), ':');
22525 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22528 return DW_STRING (attr
);
22537 if (!DW_STRING_IS_CANONICAL (attr
))
22540 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22541 &objfile
->per_bfd
->storage_obstack
);
22542 DW_STRING_IS_CANONICAL (attr
) = 1;
22544 return DW_STRING (attr
);
22547 /* Return the die that this die in an extension of, or NULL if there
22548 is none. *EXT_CU is the CU containing DIE on input, and the CU
22549 containing the return value on output. */
22551 static struct die_info
*
22552 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22554 struct attribute
*attr
;
22556 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22560 return follow_die_ref (die
, attr
, ext_cu
);
22563 /* Convert a DIE tag into its string name. */
22565 static const char *
22566 dwarf_tag_name (unsigned tag
)
22568 const char *name
= get_DW_TAG_name (tag
);
22571 return "DW_TAG_<unknown>";
22576 /* Convert a DWARF attribute code into its string name. */
22578 static const char *
22579 dwarf_attr_name (unsigned attr
)
22583 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22584 if (attr
== DW_AT_MIPS_fde
)
22585 return "DW_AT_MIPS_fde";
22587 if (attr
== DW_AT_HP_block_index
)
22588 return "DW_AT_HP_block_index";
22591 name
= get_DW_AT_name (attr
);
22594 return "DW_AT_<unknown>";
22599 /* Convert a DWARF value form code into its string name. */
22601 static const char *
22602 dwarf_form_name (unsigned form
)
22604 const char *name
= get_DW_FORM_name (form
);
22607 return "DW_FORM_<unknown>";
22612 static const char *
22613 dwarf_bool_name (unsigned mybool
)
22621 /* Convert a DWARF type code into its string name. */
22623 static const char *
22624 dwarf_type_encoding_name (unsigned enc
)
22626 const char *name
= get_DW_ATE_name (enc
);
22629 return "DW_ATE_<unknown>";
22635 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22639 print_spaces (indent
, f
);
22640 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22641 dwarf_tag_name (die
->tag
), die
->abbrev
,
22642 sect_offset_str (die
->sect_off
));
22644 if (die
->parent
!= NULL
)
22646 print_spaces (indent
, f
);
22647 fprintf_unfiltered (f
, " parent at offset: %s\n",
22648 sect_offset_str (die
->parent
->sect_off
));
22651 print_spaces (indent
, f
);
22652 fprintf_unfiltered (f
, " has children: %s\n",
22653 dwarf_bool_name (die
->child
!= NULL
));
22655 print_spaces (indent
, f
);
22656 fprintf_unfiltered (f
, " attributes:\n");
22658 for (i
= 0; i
< die
->num_attrs
; ++i
)
22660 print_spaces (indent
, f
);
22661 fprintf_unfiltered (f
, " %s (%s) ",
22662 dwarf_attr_name (die
->attrs
[i
].name
),
22663 dwarf_form_name (die
->attrs
[i
].form
));
22665 switch (die
->attrs
[i
].form
)
22668 case DW_FORM_GNU_addr_index
:
22669 fprintf_unfiltered (f
, "address: ");
22670 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22672 case DW_FORM_block2
:
22673 case DW_FORM_block4
:
22674 case DW_FORM_block
:
22675 case DW_FORM_block1
:
22676 fprintf_unfiltered (f
, "block: size %s",
22677 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22679 case DW_FORM_exprloc
:
22680 fprintf_unfiltered (f
, "expression: size %s",
22681 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22683 case DW_FORM_data16
:
22684 fprintf_unfiltered (f
, "constant of 16 bytes");
22686 case DW_FORM_ref_addr
:
22687 fprintf_unfiltered (f
, "ref address: ");
22688 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22690 case DW_FORM_GNU_ref_alt
:
22691 fprintf_unfiltered (f
, "alt ref address: ");
22692 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22698 case DW_FORM_ref_udata
:
22699 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22700 (long) (DW_UNSND (&die
->attrs
[i
])));
22702 case DW_FORM_data1
:
22703 case DW_FORM_data2
:
22704 case DW_FORM_data4
:
22705 case DW_FORM_data8
:
22706 case DW_FORM_udata
:
22707 case DW_FORM_sdata
:
22708 fprintf_unfiltered (f
, "constant: %s",
22709 pulongest (DW_UNSND (&die
->attrs
[i
])));
22711 case DW_FORM_sec_offset
:
22712 fprintf_unfiltered (f
, "section offset: %s",
22713 pulongest (DW_UNSND (&die
->attrs
[i
])));
22715 case DW_FORM_ref_sig8
:
22716 fprintf_unfiltered (f
, "signature: %s",
22717 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22719 case DW_FORM_string
:
22721 case DW_FORM_line_strp
:
22722 case DW_FORM_GNU_str_index
:
22723 case DW_FORM_GNU_strp_alt
:
22724 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22725 DW_STRING (&die
->attrs
[i
])
22726 ? DW_STRING (&die
->attrs
[i
]) : "",
22727 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22730 if (DW_UNSND (&die
->attrs
[i
]))
22731 fprintf_unfiltered (f
, "flag: TRUE");
22733 fprintf_unfiltered (f
, "flag: FALSE");
22735 case DW_FORM_flag_present
:
22736 fprintf_unfiltered (f
, "flag: TRUE");
22738 case DW_FORM_indirect
:
22739 /* The reader will have reduced the indirect form to
22740 the "base form" so this form should not occur. */
22741 fprintf_unfiltered (f
,
22742 "unexpected attribute form: DW_FORM_indirect");
22744 case DW_FORM_implicit_const
:
22745 fprintf_unfiltered (f
, "constant: %s",
22746 plongest (DW_SND (&die
->attrs
[i
])));
22749 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22750 die
->attrs
[i
].form
);
22753 fprintf_unfiltered (f
, "\n");
22758 dump_die_for_error (struct die_info
*die
)
22760 dump_die_shallow (gdb_stderr
, 0, die
);
22764 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22766 int indent
= level
* 4;
22768 gdb_assert (die
!= NULL
);
22770 if (level
>= max_level
)
22773 dump_die_shallow (f
, indent
, die
);
22775 if (die
->child
!= NULL
)
22777 print_spaces (indent
, f
);
22778 fprintf_unfiltered (f
, " Children:");
22779 if (level
+ 1 < max_level
)
22781 fprintf_unfiltered (f
, "\n");
22782 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22786 fprintf_unfiltered (f
,
22787 " [not printed, max nesting level reached]\n");
22791 if (die
->sibling
!= NULL
&& level
> 0)
22793 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22797 /* This is called from the pdie macro in gdbinit.in.
22798 It's not static so gcc will keep a copy callable from gdb. */
22801 dump_die (struct die_info
*die
, int max_level
)
22803 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22807 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22811 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22812 to_underlying (die
->sect_off
),
22818 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22822 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22824 if (attr_form_is_ref (attr
))
22825 return (sect_offset
) DW_UNSND (attr
);
22827 complaint (&symfile_complaints
,
22828 _("unsupported die ref attribute form: '%s'"),
22829 dwarf_form_name (attr
->form
));
22833 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22834 * the value held by the attribute is not constant. */
22837 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22839 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22840 return DW_SND (attr
);
22841 else if (attr
->form
== DW_FORM_udata
22842 || attr
->form
== DW_FORM_data1
22843 || attr
->form
== DW_FORM_data2
22844 || attr
->form
== DW_FORM_data4
22845 || attr
->form
== DW_FORM_data8
)
22846 return DW_UNSND (attr
);
22849 /* For DW_FORM_data16 see attr_form_is_constant. */
22850 complaint (&symfile_complaints
,
22851 _("Attribute value is not a constant (%s)"),
22852 dwarf_form_name (attr
->form
));
22853 return default_value
;
22857 /* Follow reference or signature attribute ATTR of SRC_DIE.
22858 On entry *REF_CU is the CU of SRC_DIE.
22859 On exit *REF_CU is the CU of the result. */
22861 static struct die_info
*
22862 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22863 struct dwarf2_cu
**ref_cu
)
22865 struct die_info
*die
;
22867 if (attr_form_is_ref (attr
))
22868 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22869 else if (attr
->form
== DW_FORM_ref_sig8
)
22870 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22873 dump_die_for_error (src_die
);
22874 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22875 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22881 /* Follow reference OFFSET.
22882 On entry *REF_CU is the CU of the source die referencing OFFSET.
22883 On exit *REF_CU is the CU of the result.
22884 Returns NULL if OFFSET is invalid. */
22886 static struct die_info
*
22887 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22888 struct dwarf2_cu
**ref_cu
)
22890 struct die_info temp_die
;
22891 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22892 struct dwarf2_per_objfile
*dwarf2_per_objfile
22893 = cu
->per_cu
->dwarf2_per_objfile
;
22894 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22896 gdb_assert (cu
->per_cu
!= NULL
);
22900 if (cu
->per_cu
->is_debug_types
)
22902 /* .debug_types CUs cannot reference anything outside their CU.
22903 If they need to, they have to reference a signatured type via
22904 DW_FORM_ref_sig8. */
22905 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22908 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22909 || !offset_in_cu_p (&cu
->header
, sect_off
))
22911 struct dwarf2_per_cu_data
*per_cu
;
22913 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22914 dwarf2_per_objfile
);
22916 /* If necessary, add it to the queue and load its DIEs. */
22917 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22918 load_full_comp_unit (per_cu
, cu
->language
);
22920 target_cu
= per_cu
->cu
;
22922 else if (cu
->dies
== NULL
)
22924 /* We're loading full DIEs during partial symbol reading. */
22925 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22926 load_full_comp_unit (cu
->per_cu
, language_minimal
);
22929 *ref_cu
= target_cu
;
22930 temp_die
.sect_off
= sect_off
;
22931 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22933 to_underlying (sect_off
));
22936 /* Follow reference attribute ATTR of SRC_DIE.
22937 On entry *REF_CU is the CU of SRC_DIE.
22938 On exit *REF_CU is the CU of the result. */
22940 static struct die_info
*
22941 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22942 struct dwarf2_cu
**ref_cu
)
22944 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22945 struct dwarf2_cu
*cu
= *ref_cu
;
22946 struct die_info
*die
;
22948 die
= follow_die_offset (sect_off
,
22949 (attr
->form
== DW_FORM_GNU_ref_alt
22950 || cu
->per_cu
->is_dwz
),
22953 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22954 "at %s [in module %s]"),
22955 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22956 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22961 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22962 Returned value is intended for DW_OP_call*. Returned
22963 dwarf2_locexpr_baton->data has lifetime of
22964 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22966 struct dwarf2_locexpr_baton
22967 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22968 struct dwarf2_per_cu_data
*per_cu
,
22969 CORE_ADDR (*get_frame_pc
) (void *baton
),
22972 struct dwarf2_cu
*cu
;
22973 struct die_info
*die
;
22974 struct attribute
*attr
;
22975 struct dwarf2_locexpr_baton retval
;
22976 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22977 struct dwarf2_per_objfile
*dwarf2_per_objfile
22978 = get_dwarf2_per_objfile (objfile
);
22980 if (per_cu
->cu
== NULL
)
22985 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22986 Instead just throw an error, not much else we can do. */
22987 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22988 sect_offset_str (sect_off
), objfile_name (objfile
));
22991 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22993 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22994 sect_offset_str (sect_off
), objfile_name (objfile
));
22996 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22999 /* DWARF: "If there is no such attribute, then there is no effect.".
23000 DATA is ignored if SIZE is 0. */
23002 retval
.data
= NULL
;
23005 else if (attr_form_is_section_offset (attr
))
23007 struct dwarf2_loclist_baton loclist_baton
;
23008 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23011 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23013 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23015 retval
.size
= size
;
23019 if (!attr_form_is_block (attr
))
23020 error (_("Dwarf Error: DIE at %s referenced in module %s "
23021 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23022 sect_offset_str (sect_off
), objfile_name (objfile
));
23024 retval
.data
= DW_BLOCK (attr
)->data
;
23025 retval
.size
= DW_BLOCK (attr
)->size
;
23027 retval
.per_cu
= cu
->per_cu
;
23029 age_cached_comp_units (dwarf2_per_objfile
);
23034 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23037 struct dwarf2_locexpr_baton
23038 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23039 struct dwarf2_per_cu_data
*per_cu
,
23040 CORE_ADDR (*get_frame_pc
) (void *baton
),
23043 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23045 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23048 /* Write a constant of a given type as target-ordered bytes into
23051 static const gdb_byte
*
23052 write_constant_as_bytes (struct obstack
*obstack
,
23053 enum bfd_endian byte_order
,
23060 *len
= TYPE_LENGTH (type
);
23061 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23062 store_unsigned_integer (result
, *len
, byte_order
, value
);
23067 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23068 pointer to the constant bytes and set LEN to the length of the
23069 data. If memory is needed, allocate it on OBSTACK. If the DIE
23070 does not have a DW_AT_const_value, return NULL. */
23073 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23074 struct dwarf2_per_cu_data
*per_cu
,
23075 struct obstack
*obstack
,
23078 struct dwarf2_cu
*cu
;
23079 struct die_info
*die
;
23080 struct attribute
*attr
;
23081 const gdb_byte
*result
= NULL
;
23084 enum bfd_endian byte_order
;
23085 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23087 if (per_cu
->cu
== NULL
)
23092 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23093 Instead just throw an error, not much else we can do. */
23094 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23095 sect_offset_str (sect_off
), objfile_name (objfile
));
23098 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23100 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23101 sect_offset_str (sect_off
), objfile_name (objfile
));
23103 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23107 byte_order
= (bfd_big_endian (objfile
->obfd
)
23108 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23110 switch (attr
->form
)
23113 case DW_FORM_GNU_addr_index
:
23117 *len
= cu
->header
.addr_size
;
23118 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23119 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23123 case DW_FORM_string
:
23125 case DW_FORM_GNU_str_index
:
23126 case DW_FORM_GNU_strp_alt
:
23127 /* DW_STRING is already allocated on the objfile obstack, point
23129 result
= (const gdb_byte
*) DW_STRING (attr
);
23130 *len
= strlen (DW_STRING (attr
));
23132 case DW_FORM_block1
:
23133 case DW_FORM_block2
:
23134 case DW_FORM_block4
:
23135 case DW_FORM_block
:
23136 case DW_FORM_exprloc
:
23137 case DW_FORM_data16
:
23138 result
= DW_BLOCK (attr
)->data
;
23139 *len
= DW_BLOCK (attr
)->size
;
23142 /* The DW_AT_const_value attributes are supposed to carry the
23143 symbol's value "represented as it would be on the target
23144 architecture." By the time we get here, it's already been
23145 converted to host endianness, so we just need to sign- or
23146 zero-extend it as appropriate. */
23147 case DW_FORM_data1
:
23148 type
= die_type (die
, cu
);
23149 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23150 if (result
== NULL
)
23151 result
= write_constant_as_bytes (obstack
, byte_order
,
23154 case DW_FORM_data2
:
23155 type
= die_type (die
, cu
);
23156 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23157 if (result
== NULL
)
23158 result
= write_constant_as_bytes (obstack
, byte_order
,
23161 case DW_FORM_data4
:
23162 type
= die_type (die
, cu
);
23163 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23164 if (result
== NULL
)
23165 result
= write_constant_as_bytes (obstack
, byte_order
,
23168 case DW_FORM_data8
:
23169 type
= die_type (die
, cu
);
23170 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23171 if (result
== NULL
)
23172 result
= write_constant_as_bytes (obstack
, byte_order
,
23176 case DW_FORM_sdata
:
23177 case DW_FORM_implicit_const
:
23178 type
= die_type (die
, cu
);
23179 result
= write_constant_as_bytes (obstack
, byte_order
,
23180 type
, DW_SND (attr
), len
);
23183 case DW_FORM_udata
:
23184 type
= die_type (die
, cu
);
23185 result
= write_constant_as_bytes (obstack
, byte_order
,
23186 type
, DW_UNSND (attr
), len
);
23190 complaint (&symfile_complaints
,
23191 _("unsupported const value attribute form: '%s'"),
23192 dwarf_form_name (attr
->form
));
23199 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23200 valid type for this die is found. */
23203 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23204 struct dwarf2_per_cu_data
*per_cu
)
23206 struct dwarf2_cu
*cu
;
23207 struct die_info
*die
;
23209 if (per_cu
->cu
== NULL
)
23215 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23219 return die_type (die
, cu
);
23222 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23226 dwarf2_get_die_type (cu_offset die_offset
,
23227 struct dwarf2_per_cu_data
*per_cu
)
23229 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23230 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23233 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23234 On entry *REF_CU is the CU of SRC_DIE.
23235 On exit *REF_CU is the CU of the result.
23236 Returns NULL if the referenced DIE isn't found. */
23238 static struct die_info
*
23239 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23240 struct dwarf2_cu
**ref_cu
)
23242 struct die_info temp_die
;
23243 struct dwarf2_cu
*sig_cu
;
23244 struct die_info
*die
;
23246 /* While it might be nice to assert sig_type->type == NULL here,
23247 we can get here for DW_AT_imported_declaration where we need
23248 the DIE not the type. */
23250 /* If necessary, add it to the queue and load its DIEs. */
23252 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23253 read_signatured_type (sig_type
);
23255 sig_cu
= sig_type
->per_cu
.cu
;
23256 gdb_assert (sig_cu
!= NULL
);
23257 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23258 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23259 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23260 to_underlying (temp_die
.sect_off
));
23263 struct dwarf2_per_objfile
*dwarf2_per_objfile
23264 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23266 /* For .gdb_index version 7 keep track of included TUs.
23267 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23268 if (dwarf2_per_objfile
->index_table
!= NULL
23269 && dwarf2_per_objfile
->index_table
->version
<= 7)
23271 VEC_safe_push (dwarf2_per_cu_ptr
,
23272 (*ref_cu
)->per_cu
->imported_symtabs
,
23283 /* Follow signatured type referenced by ATTR in SRC_DIE.
23284 On entry *REF_CU is the CU of SRC_DIE.
23285 On exit *REF_CU is the CU of the result.
23286 The result is the DIE of the type.
23287 If the referenced type cannot be found an error is thrown. */
23289 static struct die_info
*
23290 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23291 struct dwarf2_cu
**ref_cu
)
23293 ULONGEST signature
= DW_SIGNATURE (attr
);
23294 struct signatured_type
*sig_type
;
23295 struct die_info
*die
;
23297 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23299 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23300 /* sig_type will be NULL if the signatured type is missing from
23302 if (sig_type
== NULL
)
23304 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23305 " from DIE at %s [in module %s]"),
23306 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23307 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23310 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23313 dump_die_for_error (src_die
);
23314 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23315 " from DIE at %s [in module %s]"),
23316 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23317 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23323 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23324 reading in and processing the type unit if necessary. */
23326 static struct type
*
23327 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23328 struct dwarf2_cu
*cu
)
23330 struct dwarf2_per_objfile
*dwarf2_per_objfile
23331 = cu
->per_cu
->dwarf2_per_objfile
;
23332 struct signatured_type
*sig_type
;
23333 struct dwarf2_cu
*type_cu
;
23334 struct die_info
*type_die
;
23337 sig_type
= lookup_signatured_type (cu
, signature
);
23338 /* sig_type will be NULL if the signatured type is missing from
23340 if (sig_type
== NULL
)
23342 complaint (&symfile_complaints
,
23343 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23344 " from DIE at %s [in module %s]"),
23345 hex_string (signature
), sect_offset_str (die
->sect_off
),
23346 objfile_name (dwarf2_per_objfile
->objfile
));
23347 return build_error_marker_type (cu
, die
);
23350 /* If we already know the type we're done. */
23351 if (sig_type
->type
!= NULL
)
23352 return sig_type
->type
;
23355 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23356 if (type_die
!= NULL
)
23358 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23359 is created. This is important, for example, because for c++ classes
23360 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23361 type
= read_type_die (type_die
, type_cu
);
23364 complaint (&symfile_complaints
,
23365 _("Dwarf Error: Cannot build signatured type %s"
23366 " referenced from DIE at %s [in module %s]"),
23367 hex_string (signature
), sect_offset_str (die
->sect_off
),
23368 objfile_name (dwarf2_per_objfile
->objfile
));
23369 type
= build_error_marker_type (cu
, die
);
23374 complaint (&symfile_complaints
,
23375 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23376 " from DIE at %s [in module %s]"),
23377 hex_string (signature
), sect_offset_str (die
->sect_off
),
23378 objfile_name (dwarf2_per_objfile
->objfile
));
23379 type
= build_error_marker_type (cu
, die
);
23381 sig_type
->type
= type
;
23386 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23387 reading in and processing the type unit if necessary. */
23389 static struct type
*
23390 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23391 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23393 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23394 if (attr_form_is_ref (attr
))
23396 struct dwarf2_cu
*type_cu
= cu
;
23397 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23399 return read_type_die (type_die
, type_cu
);
23401 else if (attr
->form
== DW_FORM_ref_sig8
)
23403 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23407 struct dwarf2_per_objfile
*dwarf2_per_objfile
23408 = cu
->per_cu
->dwarf2_per_objfile
;
23410 complaint (&symfile_complaints
,
23411 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23412 " at %s [in module %s]"),
23413 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23414 objfile_name (dwarf2_per_objfile
->objfile
));
23415 return build_error_marker_type (cu
, die
);
23419 /* Load the DIEs associated with type unit PER_CU into memory. */
23422 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23424 struct signatured_type
*sig_type
;
23426 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23427 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23429 /* We have the per_cu, but we need the signatured_type.
23430 Fortunately this is an easy translation. */
23431 gdb_assert (per_cu
->is_debug_types
);
23432 sig_type
= (struct signatured_type
*) per_cu
;
23434 gdb_assert (per_cu
->cu
== NULL
);
23436 read_signatured_type (sig_type
);
23438 gdb_assert (per_cu
->cu
!= NULL
);
23441 /* die_reader_func for read_signatured_type.
23442 This is identical to load_full_comp_unit_reader,
23443 but is kept separate for now. */
23446 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23447 const gdb_byte
*info_ptr
,
23448 struct die_info
*comp_unit_die
,
23452 struct dwarf2_cu
*cu
= reader
->cu
;
23454 gdb_assert (cu
->die_hash
== NULL
);
23456 htab_create_alloc_ex (cu
->header
.length
/ 12,
23460 &cu
->comp_unit_obstack
,
23461 hashtab_obstack_allocate
,
23462 dummy_obstack_deallocate
);
23465 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23466 &info_ptr
, comp_unit_die
);
23467 cu
->dies
= comp_unit_die
;
23468 /* comp_unit_die is not stored in die_hash, no need. */
23470 /* We try not to read any attributes in this function, because not
23471 all CUs needed for references have been loaded yet, and symbol
23472 table processing isn't initialized. But we have to set the CU language,
23473 or we won't be able to build types correctly.
23474 Similarly, if we do not read the producer, we can not apply
23475 producer-specific interpretation. */
23476 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23479 /* Read in a signatured type and build its CU and DIEs.
23480 If the type is a stub for the real type in a DWO file,
23481 read in the real type from the DWO file as well. */
23484 read_signatured_type (struct signatured_type
*sig_type
)
23486 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23488 gdb_assert (per_cu
->is_debug_types
);
23489 gdb_assert (per_cu
->cu
== NULL
);
23491 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
23492 read_signatured_type_reader
, NULL
);
23493 sig_type
->per_cu
.tu_read
= 1;
23496 /* Decode simple location descriptions.
23497 Given a pointer to a dwarf block that defines a location, compute
23498 the location and return the value.
23500 NOTE drow/2003-11-18: This function is called in two situations
23501 now: for the address of static or global variables (partial symbols
23502 only) and for offsets into structures which are expected to be
23503 (more or less) constant. The partial symbol case should go away,
23504 and only the constant case should remain. That will let this
23505 function complain more accurately. A few special modes are allowed
23506 without complaint for global variables (for instance, global
23507 register values and thread-local values).
23509 A location description containing no operations indicates that the
23510 object is optimized out. The return value is 0 for that case.
23511 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23512 callers will only want a very basic result and this can become a
23515 Note that stack[0] is unused except as a default error return. */
23518 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23520 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23522 size_t size
= blk
->size
;
23523 const gdb_byte
*data
= blk
->data
;
23524 CORE_ADDR stack
[64];
23526 unsigned int bytes_read
, unsnd
;
23532 stack
[++stacki
] = 0;
23571 stack
[++stacki
] = op
- DW_OP_lit0
;
23606 stack
[++stacki
] = op
- DW_OP_reg0
;
23608 dwarf2_complex_location_expr_complaint ();
23612 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23614 stack
[++stacki
] = unsnd
;
23616 dwarf2_complex_location_expr_complaint ();
23620 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23625 case DW_OP_const1u
:
23626 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23630 case DW_OP_const1s
:
23631 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23635 case DW_OP_const2u
:
23636 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23640 case DW_OP_const2s
:
23641 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23645 case DW_OP_const4u
:
23646 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23650 case DW_OP_const4s
:
23651 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23655 case DW_OP_const8u
:
23656 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23661 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23667 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23672 stack
[stacki
+ 1] = stack
[stacki
];
23677 stack
[stacki
- 1] += stack
[stacki
];
23681 case DW_OP_plus_uconst
:
23682 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23688 stack
[stacki
- 1] -= stack
[stacki
];
23693 /* If we're not the last op, then we definitely can't encode
23694 this using GDB's address_class enum. This is valid for partial
23695 global symbols, although the variable's address will be bogus
23698 dwarf2_complex_location_expr_complaint ();
23701 case DW_OP_GNU_push_tls_address
:
23702 case DW_OP_form_tls_address
:
23703 /* The top of the stack has the offset from the beginning
23704 of the thread control block at which the variable is located. */
23705 /* Nothing should follow this operator, so the top of stack would
23707 /* This is valid for partial global symbols, but the variable's
23708 address will be bogus in the psymtab. Make it always at least
23709 non-zero to not look as a variable garbage collected by linker
23710 which have DW_OP_addr 0. */
23712 dwarf2_complex_location_expr_complaint ();
23716 case DW_OP_GNU_uninit
:
23719 case DW_OP_GNU_addr_index
:
23720 case DW_OP_GNU_const_index
:
23721 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23728 const char *name
= get_DW_OP_name (op
);
23731 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23734 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23738 return (stack
[stacki
]);
23741 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23742 outside of the allocated space. Also enforce minimum>0. */
23743 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23745 complaint (&symfile_complaints
,
23746 _("location description stack overflow"));
23752 complaint (&symfile_complaints
,
23753 _("location description stack underflow"));
23757 return (stack
[stacki
]);
23760 /* memory allocation interface */
23762 static struct dwarf_block
*
23763 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23765 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23768 static struct die_info
*
23769 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23771 struct die_info
*die
;
23772 size_t size
= sizeof (struct die_info
);
23775 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23777 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23778 memset (die
, 0, sizeof (struct die_info
));
23783 /* Macro support. */
23785 /* Return file name relative to the compilation directory of file number I in
23786 *LH's file name table. The result is allocated using xmalloc; the caller is
23787 responsible for freeing it. */
23790 file_file_name (int file
, struct line_header
*lh
)
23792 /* Is the file number a valid index into the line header's file name
23793 table? Remember that file numbers start with one, not zero. */
23794 if (1 <= file
&& file
<= lh
->file_names
.size ())
23796 const file_entry
&fe
= lh
->file_names
[file
- 1];
23798 if (!IS_ABSOLUTE_PATH (fe
.name
))
23800 const char *dir
= fe
.include_dir (lh
);
23802 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23804 return xstrdup (fe
.name
);
23808 /* The compiler produced a bogus file number. We can at least
23809 record the macro definitions made in the file, even if we
23810 won't be able to find the file by name. */
23811 char fake_name
[80];
23813 xsnprintf (fake_name
, sizeof (fake_name
),
23814 "<bad macro file number %d>", file
);
23816 complaint (&symfile_complaints
,
23817 _("bad file number in macro information (%d)"),
23820 return xstrdup (fake_name
);
23824 /* Return the full name of file number I in *LH's file name table.
23825 Use COMP_DIR as the name of the current directory of the
23826 compilation. The result is allocated using xmalloc; the caller is
23827 responsible for freeing it. */
23829 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23831 /* Is the file number a valid index into the line header's file name
23832 table? Remember that file numbers start with one, not zero. */
23833 if (1 <= file
&& file
<= lh
->file_names
.size ())
23835 char *relative
= file_file_name (file
, lh
);
23837 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23839 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23840 relative
, (char *) NULL
);
23843 return file_file_name (file
, lh
);
23847 static struct macro_source_file
*
23848 macro_start_file (int file
, int line
,
23849 struct macro_source_file
*current_file
,
23850 struct line_header
*lh
)
23852 /* File name relative to the compilation directory of this source file. */
23853 char *file_name
= file_file_name (file
, lh
);
23855 if (! current_file
)
23857 /* Note: We don't create a macro table for this compilation unit
23858 at all until we actually get a filename. */
23859 struct macro_table
*macro_table
= get_macro_table ();
23861 /* If we have no current file, then this must be the start_file
23862 directive for the compilation unit's main source file. */
23863 current_file
= macro_set_main (macro_table
, file_name
);
23864 macro_define_special (macro_table
);
23867 current_file
= macro_include (current_file
, line
, file_name
);
23871 return current_file
;
23874 static const char *
23875 consume_improper_spaces (const char *p
, const char *body
)
23879 complaint (&symfile_complaints
,
23880 _("macro definition contains spaces "
23881 "in formal argument list:\n`%s'"),
23893 parse_macro_definition (struct macro_source_file
*file
, int line
,
23898 /* The body string takes one of two forms. For object-like macro
23899 definitions, it should be:
23901 <macro name> " " <definition>
23903 For function-like macro definitions, it should be:
23905 <macro name> "() " <definition>
23907 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23909 Spaces may appear only where explicitly indicated, and in the
23912 The Dwarf 2 spec says that an object-like macro's name is always
23913 followed by a space, but versions of GCC around March 2002 omit
23914 the space when the macro's definition is the empty string.
23916 The Dwarf 2 spec says that there should be no spaces between the
23917 formal arguments in a function-like macro's formal argument list,
23918 but versions of GCC around March 2002 include spaces after the
23922 /* Find the extent of the macro name. The macro name is terminated
23923 by either a space or null character (for an object-like macro) or
23924 an opening paren (for a function-like macro). */
23925 for (p
= body
; *p
; p
++)
23926 if (*p
== ' ' || *p
== '(')
23929 if (*p
== ' ' || *p
== '\0')
23931 /* It's an object-like macro. */
23932 int name_len
= p
- body
;
23933 char *name
= savestring (body
, name_len
);
23934 const char *replacement
;
23937 replacement
= body
+ name_len
+ 1;
23940 dwarf2_macro_malformed_definition_complaint (body
);
23941 replacement
= body
+ name_len
;
23944 macro_define_object (file
, line
, name
, replacement
);
23948 else if (*p
== '(')
23950 /* It's a function-like macro. */
23951 char *name
= savestring (body
, p
- body
);
23954 char **argv
= XNEWVEC (char *, argv_size
);
23958 p
= consume_improper_spaces (p
, body
);
23960 /* Parse the formal argument list. */
23961 while (*p
&& *p
!= ')')
23963 /* Find the extent of the current argument name. */
23964 const char *arg_start
= p
;
23966 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23969 if (! *p
|| p
== arg_start
)
23970 dwarf2_macro_malformed_definition_complaint (body
);
23973 /* Make sure argv has room for the new argument. */
23974 if (argc
>= argv_size
)
23977 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23980 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23983 p
= consume_improper_spaces (p
, body
);
23985 /* Consume the comma, if present. */
23990 p
= consume_improper_spaces (p
, body
);
23999 /* Perfectly formed definition, no complaints. */
24000 macro_define_function (file
, line
, name
,
24001 argc
, (const char **) argv
,
24003 else if (*p
== '\0')
24005 /* Complain, but do define it. */
24006 dwarf2_macro_malformed_definition_complaint (body
);
24007 macro_define_function (file
, line
, name
,
24008 argc
, (const char **) argv
,
24012 /* Just complain. */
24013 dwarf2_macro_malformed_definition_complaint (body
);
24016 /* Just complain. */
24017 dwarf2_macro_malformed_definition_complaint (body
);
24023 for (i
= 0; i
< argc
; i
++)
24029 dwarf2_macro_malformed_definition_complaint (body
);
24032 /* Skip some bytes from BYTES according to the form given in FORM.
24033 Returns the new pointer. */
24035 static const gdb_byte
*
24036 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24037 enum dwarf_form form
,
24038 unsigned int offset_size
,
24039 struct dwarf2_section_info
*section
)
24041 unsigned int bytes_read
;
24045 case DW_FORM_data1
:
24050 case DW_FORM_data2
:
24054 case DW_FORM_data4
:
24058 case DW_FORM_data8
:
24062 case DW_FORM_data16
:
24066 case DW_FORM_string
:
24067 read_direct_string (abfd
, bytes
, &bytes_read
);
24068 bytes
+= bytes_read
;
24071 case DW_FORM_sec_offset
:
24073 case DW_FORM_GNU_strp_alt
:
24074 bytes
+= offset_size
;
24077 case DW_FORM_block
:
24078 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24079 bytes
+= bytes_read
;
24082 case DW_FORM_block1
:
24083 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24085 case DW_FORM_block2
:
24086 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24088 case DW_FORM_block4
:
24089 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24092 case DW_FORM_sdata
:
24093 case DW_FORM_udata
:
24094 case DW_FORM_GNU_addr_index
:
24095 case DW_FORM_GNU_str_index
:
24096 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24099 dwarf2_section_buffer_overflow_complaint (section
);
24104 case DW_FORM_implicit_const
:
24109 complaint (&symfile_complaints
,
24110 _("invalid form 0x%x in `%s'"),
24111 form
, get_section_name (section
));
24119 /* A helper for dwarf_decode_macros that handles skipping an unknown
24120 opcode. Returns an updated pointer to the macro data buffer; or,
24121 on error, issues a complaint and returns NULL. */
24123 static const gdb_byte
*
24124 skip_unknown_opcode (unsigned int opcode
,
24125 const gdb_byte
**opcode_definitions
,
24126 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24128 unsigned int offset_size
,
24129 struct dwarf2_section_info
*section
)
24131 unsigned int bytes_read
, i
;
24133 const gdb_byte
*defn
;
24135 if (opcode_definitions
[opcode
] == NULL
)
24137 complaint (&symfile_complaints
,
24138 _("unrecognized DW_MACFINO opcode 0x%x"),
24143 defn
= opcode_definitions
[opcode
];
24144 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24145 defn
+= bytes_read
;
24147 for (i
= 0; i
< arg
; ++i
)
24149 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24150 (enum dwarf_form
) defn
[i
], offset_size
,
24152 if (mac_ptr
== NULL
)
24154 /* skip_form_bytes already issued the complaint. */
24162 /* A helper function which parses the header of a macro section.
24163 If the macro section is the extended (for now called "GNU") type,
24164 then this updates *OFFSET_SIZE. Returns a pointer to just after
24165 the header, or issues a complaint and returns NULL on error. */
24167 static const gdb_byte
*
24168 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24170 const gdb_byte
*mac_ptr
,
24171 unsigned int *offset_size
,
24172 int section_is_gnu
)
24174 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24176 if (section_is_gnu
)
24178 unsigned int version
, flags
;
24180 version
= read_2_bytes (abfd
, mac_ptr
);
24181 if (version
!= 4 && version
!= 5)
24183 complaint (&symfile_complaints
,
24184 _("unrecognized version `%d' in .debug_macro section"),
24190 flags
= read_1_byte (abfd
, mac_ptr
);
24192 *offset_size
= (flags
& 1) ? 8 : 4;
24194 if ((flags
& 2) != 0)
24195 /* We don't need the line table offset. */
24196 mac_ptr
+= *offset_size
;
24198 /* Vendor opcode descriptions. */
24199 if ((flags
& 4) != 0)
24201 unsigned int i
, count
;
24203 count
= read_1_byte (abfd
, mac_ptr
);
24205 for (i
= 0; i
< count
; ++i
)
24207 unsigned int opcode
, bytes_read
;
24210 opcode
= read_1_byte (abfd
, mac_ptr
);
24212 opcode_definitions
[opcode
] = mac_ptr
;
24213 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24214 mac_ptr
+= bytes_read
;
24223 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24224 including DW_MACRO_import. */
24227 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24229 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24230 struct macro_source_file
*current_file
,
24231 struct line_header
*lh
,
24232 struct dwarf2_section_info
*section
,
24233 int section_is_gnu
, int section_is_dwz
,
24234 unsigned int offset_size
,
24235 htab_t include_hash
)
24237 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24238 enum dwarf_macro_record_type macinfo_type
;
24239 int at_commandline
;
24240 const gdb_byte
*opcode_definitions
[256];
24242 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24243 &offset_size
, section_is_gnu
);
24244 if (mac_ptr
== NULL
)
24246 /* We already issued a complaint. */
24250 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24251 GDB is still reading the definitions from command line. First
24252 DW_MACINFO_start_file will need to be ignored as it was already executed
24253 to create CURRENT_FILE for the main source holding also the command line
24254 definitions. On first met DW_MACINFO_start_file this flag is reset to
24255 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24257 at_commandline
= 1;
24261 /* Do we at least have room for a macinfo type byte? */
24262 if (mac_ptr
>= mac_end
)
24264 dwarf2_section_buffer_overflow_complaint (section
);
24268 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24271 /* Note that we rely on the fact that the corresponding GNU and
24272 DWARF constants are the same. */
24274 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24275 switch (macinfo_type
)
24277 /* A zero macinfo type indicates the end of the macro
24282 case DW_MACRO_define
:
24283 case DW_MACRO_undef
:
24284 case DW_MACRO_define_strp
:
24285 case DW_MACRO_undef_strp
:
24286 case DW_MACRO_define_sup
:
24287 case DW_MACRO_undef_sup
:
24289 unsigned int bytes_read
;
24294 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24295 mac_ptr
+= bytes_read
;
24297 if (macinfo_type
== DW_MACRO_define
24298 || macinfo_type
== DW_MACRO_undef
)
24300 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24301 mac_ptr
+= bytes_read
;
24305 LONGEST str_offset
;
24307 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24308 mac_ptr
+= offset_size
;
24310 if (macinfo_type
== DW_MACRO_define_sup
24311 || macinfo_type
== DW_MACRO_undef_sup
24314 struct dwz_file
*dwz
24315 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24317 body
= read_indirect_string_from_dwz (objfile
,
24321 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24325 is_define
= (macinfo_type
== DW_MACRO_define
24326 || macinfo_type
== DW_MACRO_define_strp
24327 || macinfo_type
== DW_MACRO_define_sup
);
24328 if (! current_file
)
24330 /* DWARF violation as no main source is present. */
24331 complaint (&symfile_complaints
,
24332 _("debug info with no main source gives macro %s "
24334 is_define
? _("definition") : _("undefinition"),
24338 if ((line
== 0 && !at_commandline
)
24339 || (line
!= 0 && at_commandline
))
24340 complaint (&symfile_complaints
,
24341 _("debug info gives %s macro %s with %s line %d: %s"),
24342 at_commandline
? _("command-line") : _("in-file"),
24343 is_define
? _("definition") : _("undefinition"),
24344 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24347 parse_macro_definition (current_file
, line
, body
);
24350 gdb_assert (macinfo_type
== DW_MACRO_undef
24351 || macinfo_type
== DW_MACRO_undef_strp
24352 || macinfo_type
== DW_MACRO_undef_sup
);
24353 macro_undef (current_file
, line
, body
);
24358 case DW_MACRO_start_file
:
24360 unsigned int bytes_read
;
24363 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24364 mac_ptr
+= bytes_read
;
24365 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24366 mac_ptr
+= bytes_read
;
24368 if ((line
== 0 && !at_commandline
)
24369 || (line
!= 0 && at_commandline
))
24370 complaint (&symfile_complaints
,
24371 _("debug info gives source %d included "
24372 "from %s at %s line %d"),
24373 file
, at_commandline
? _("command-line") : _("file"),
24374 line
== 0 ? _("zero") : _("non-zero"), line
);
24376 if (at_commandline
)
24378 /* This DW_MACRO_start_file was executed in the
24380 at_commandline
= 0;
24383 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24387 case DW_MACRO_end_file
:
24388 if (! current_file
)
24389 complaint (&symfile_complaints
,
24390 _("macro debug info has an unmatched "
24391 "`close_file' directive"));
24394 current_file
= current_file
->included_by
;
24395 if (! current_file
)
24397 enum dwarf_macro_record_type next_type
;
24399 /* GCC circa March 2002 doesn't produce the zero
24400 type byte marking the end of the compilation
24401 unit. Complain if it's not there, but exit no
24404 /* Do we at least have room for a macinfo type byte? */
24405 if (mac_ptr
>= mac_end
)
24407 dwarf2_section_buffer_overflow_complaint (section
);
24411 /* We don't increment mac_ptr here, so this is just
24414 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24416 if (next_type
!= 0)
24417 complaint (&symfile_complaints
,
24418 _("no terminating 0-type entry for "
24419 "macros in `.debug_macinfo' section"));
24426 case DW_MACRO_import
:
24427 case DW_MACRO_import_sup
:
24431 bfd
*include_bfd
= abfd
;
24432 struct dwarf2_section_info
*include_section
= section
;
24433 const gdb_byte
*include_mac_end
= mac_end
;
24434 int is_dwz
= section_is_dwz
;
24435 const gdb_byte
*new_mac_ptr
;
24437 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24438 mac_ptr
+= offset_size
;
24440 if (macinfo_type
== DW_MACRO_import_sup
)
24442 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24444 dwarf2_read_section (objfile
, &dwz
->macro
);
24446 include_section
= &dwz
->macro
;
24447 include_bfd
= get_section_bfd_owner (include_section
);
24448 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24452 new_mac_ptr
= include_section
->buffer
+ offset
;
24453 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24457 /* This has actually happened; see
24458 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24459 complaint (&symfile_complaints
,
24460 _("recursive DW_MACRO_import in "
24461 ".debug_macro section"));
24465 *slot
= (void *) new_mac_ptr
;
24467 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24468 include_bfd
, new_mac_ptr
,
24469 include_mac_end
, current_file
, lh
,
24470 section
, section_is_gnu
, is_dwz
,
24471 offset_size
, include_hash
);
24473 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24478 case DW_MACINFO_vendor_ext
:
24479 if (!section_is_gnu
)
24481 unsigned int bytes_read
;
24483 /* This reads the constant, but since we don't recognize
24484 any vendor extensions, we ignore it. */
24485 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24486 mac_ptr
+= bytes_read
;
24487 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24488 mac_ptr
+= bytes_read
;
24490 /* We don't recognize any vendor extensions. */
24496 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24497 mac_ptr
, mac_end
, abfd
, offset_size
,
24499 if (mac_ptr
== NULL
)
24504 } while (macinfo_type
!= 0);
24508 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24509 int section_is_gnu
)
24511 struct dwarf2_per_objfile
*dwarf2_per_objfile
24512 = cu
->per_cu
->dwarf2_per_objfile
;
24513 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24514 struct line_header
*lh
= cu
->line_header
;
24516 const gdb_byte
*mac_ptr
, *mac_end
;
24517 struct macro_source_file
*current_file
= 0;
24518 enum dwarf_macro_record_type macinfo_type
;
24519 unsigned int offset_size
= cu
->header
.offset_size
;
24520 const gdb_byte
*opcode_definitions
[256];
24522 struct dwarf2_section_info
*section
;
24523 const char *section_name
;
24525 if (cu
->dwo_unit
!= NULL
)
24527 if (section_is_gnu
)
24529 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24530 section_name
= ".debug_macro.dwo";
24534 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24535 section_name
= ".debug_macinfo.dwo";
24540 if (section_is_gnu
)
24542 section
= &dwarf2_per_objfile
->macro
;
24543 section_name
= ".debug_macro";
24547 section
= &dwarf2_per_objfile
->macinfo
;
24548 section_name
= ".debug_macinfo";
24552 dwarf2_read_section (objfile
, section
);
24553 if (section
->buffer
== NULL
)
24555 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24558 abfd
= get_section_bfd_owner (section
);
24560 /* First pass: Find the name of the base filename.
24561 This filename is needed in order to process all macros whose definition
24562 (or undefinition) comes from the command line. These macros are defined
24563 before the first DW_MACINFO_start_file entry, and yet still need to be
24564 associated to the base file.
24566 To determine the base file name, we scan the macro definitions until we
24567 reach the first DW_MACINFO_start_file entry. We then initialize
24568 CURRENT_FILE accordingly so that any macro definition found before the
24569 first DW_MACINFO_start_file can still be associated to the base file. */
24571 mac_ptr
= section
->buffer
+ offset
;
24572 mac_end
= section
->buffer
+ section
->size
;
24574 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24575 &offset_size
, section_is_gnu
);
24576 if (mac_ptr
== NULL
)
24578 /* We already issued a complaint. */
24584 /* Do we at least have room for a macinfo type byte? */
24585 if (mac_ptr
>= mac_end
)
24587 /* Complaint is printed during the second pass as GDB will probably
24588 stop the first pass earlier upon finding
24589 DW_MACINFO_start_file. */
24593 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24596 /* Note that we rely on the fact that the corresponding GNU and
24597 DWARF constants are the same. */
24599 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24600 switch (macinfo_type
)
24602 /* A zero macinfo type indicates the end of the macro
24607 case DW_MACRO_define
:
24608 case DW_MACRO_undef
:
24609 /* Only skip the data by MAC_PTR. */
24611 unsigned int bytes_read
;
24613 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24614 mac_ptr
+= bytes_read
;
24615 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24616 mac_ptr
+= bytes_read
;
24620 case DW_MACRO_start_file
:
24622 unsigned int bytes_read
;
24625 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24626 mac_ptr
+= bytes_read
;
24627 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24628 mac_ptr
+= bytes_read
;
24630 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24634 case DW_MACRO_end_file
:
24635 /* No data to skip by MAC_PTR. */
24638 case DW_MACRO_define_strp
:
24639 case DW_MACRO_undef_strp
:
24640 case DW_MACRO_define_sup
:
24641 case DW_MACRO_undef_sup
:
24643 unsigned int bytes_read
;
24645 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24646 mac_ptr
+= bytes_read
;
24647 mac_ptr
+= offset_size
;
24651 case DW_MACRO_import
:
24652 case DW_MACRO_import_sup
:
24653 /* Note that, according to the spec, a transparent include
24654 chain cannot call DW_MACRO_start_file. So, we can just
24655 skip this opcode. */
24656 mac_ptr
+= offset_size
;
24659 case DW_MACINFO_vendor_ext
:
24660 /* Only skip the data by MAC_PTR. */
24661 if (!section_is_gnu
)
24663 unsigned int bytes_read
;
24665 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24666 mac_ptr
+= bytes_read
;
24667 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24668 mac_ptr
+= bytes_read
;
24673 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24674 mac_ptr
, mac_end
, abfd
, offset_size
,
24676 if (mac_ptr
== NULL
)
24681 } while (macinfo_type
!= 0 && current_file
== NULL
);
24683 /* Second pass: Process all entries.
24685 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24686 command-line macro definitions/undefinitions. This flag is unset when we
24687 reach the first DW_MACINFO_start_file entry. */
24689 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24691 NULL
, xcalloc
, xfree
));
24692 mac_ptr
= section
->buffer
+ offset
;
24693 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24694 *slot
= (void *) mac_ptr
;
24695 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24696 abfd
, mac_ptr
, mac_end
,
24697 current_file
, lh
, section
,
24698 section_is_gnu
, 0, offset_size
,
24699 include_hash
.get ());
24702 /* Check if the attribute's form is a DW_FORM_block*
24703 if so return true else false. */
24706 attr_form_is_block (const struct attribute
*attr
)
24708 return (attr
== NULL
? 0 :
24709 attr
->form
== DW_FORM_block1
24710 || attr
->form
== DW_FORM_block2
24711 || attr
->form
== DW_FORM_block4
24712 || attr
->form
== DW_FORM_block
24713 || attr
->form
== DW_FORM_exprloc
);
24716 /* Return non-zero if ATTR's value is a section offset --- classes
24717 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24718 You may use DW_UNSND (attr) to retrieve such offsets.
24720 Section 7.5.4, "Attribute Encodings", explains that no attribute
24721 may have a value that belongs to more than one of these classes; it
24722 would be ambiguous if we did, because we use the same forms for all
24726 attr_form_is_section_offset (const struct attribute
*attr
)
24728 return (attr
->form
== DW_FORM_data4
24729 || attr
->form
== DW_FORM_data8
24730 || attr
->form
== DW_FORM_sec_offset
);
24733 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24734 zero otherwise. When this function returns true, you can apply
24735 dwarf2_get_attr_constant_value to it.
24737 However, note that for some attributes you must check
24738 attr_form_is_section_offset before using this test. DW_FORM_data4
24739 and DW_FORM_data8 are members of both the constant class, and of
24740 the classes that contain offsets into other debug sections
24741 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24742 that, if an attribute's can be either a constant or one of the
24743 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24744 taken as section offsets, not constants.
24746 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24747 cannot handle that. */
24750 attr_form_is_constant (const struct attribute
*attr
)
24752 switch (attr
->form
)
24754 case DW_FORM_sdata
:
24755 case DW_FORM_udata
:
24756 case DW_FORM_data1
:
24757 case DW_FORM_data2
:
24758 case DW_FORM_data4
:
24759 case DW_FORM_data8
:
24760 case DW_FORM_implicit_const
:
24768 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24769 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24772 attr_form_is_ref (const struct attribute
*attr
)
24774 switch (attr
->form
)
24776 case DW_FORM_ref_addr
:
24781 case DW_FORM_ref_udata
:
24782 case DW_FORM_GNU_ref_alt
:
24789 /* Return the .debug_loc section to use for CU.
24790 For DWO files use .debug_loc.dwo. */
24792 static struct dwarf2_section_info
*
24793 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24795 struct dwarf2_per_objfile
*dwarf2_per_objfile
24796 = cu
->per_cu
->dwarf2_per_objfile
;
24800 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24802 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24804 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24805 : &dwarf2_per_objfile
->loc
);
24808 /* A helper function that fills in a dwarf2_loclist_baton. */
24811 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24812 struct dwarf2_loclist_baton
*baton
,
24813 const struct attribute
*attr
)
24815 struct dwarf2_per_objfile
*dwarf2_per_objfile
24816 = cu
->per_cu
->dwarf2_per_objfile
;
24817 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24819 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24821 baton
->per_cu
= cu
->per_cu
;
24822 gdb_assert (baton
->per_cu
);
24823 /* We don't know how long the location list is, but make sure we
24824 don't run off the edge of the section. */
24825 baton
->size
= section
->size
- DW_UNSND (attr
);
24826 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24827 baton
->base_address
= cu
->base_address
;
24828 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24832 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24833 struct dwarf2_cu
*cu
, int is_block
)
24835 struct dwarf2_per_objfile
*dwarf2_per_objfile
24836 = cu
->per_cu
->dwarf2_per_objfile
;
24837 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24838 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24840 if (attr_form_is_section_offset (attr
)
24841 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24842 the section. If so, fall through to the complaint in the
24844 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24846 struct dwarf2_loclist_baton
*baton
;
24848 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24850 fill_in_loclist_baton (cu
, baton
, attr
);
24852 if (cu
->base_known
== 0)
24853 complaint (&symfile_complaints
,
24854 _("Location list used without "
24855 "specifying the CU base address."));
24857 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24858 ? dwarf2_loclist_block_index
24859 : dwarf2_loclist_index
);
24860 SYMBOL_LOCATION_BATON (sym
) = baton
;
24864 struct dwarf2_locexpr_baton
*baton
;
24866 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24867 baton
->per_cu
= cu
->per_cu
;
24868 gdb_assert (baton
->per_cu
);
24870 if (attr_form_is_block (attr
))
24872 /* Note that we're just copying the block's data pointer
24873 here, not the actual data. We're still pointing into the
24874 info_buffer for SYM's objfile; right now we never release
24875 that buffer, but when we do clean up properly this may
24877 baton
->size
= DW_BLOCK (attr
)->size
;
24878 baton
->data
= DW_BLOCK (attr
)->data
;
24882 dwarf2_invalid_attrib_class_complaint ("location description",
24883 SYMBOL_NATURAL_NAME (sym
));
24887 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24888 ? dwarf2_locexpr_block_index
24889 : dwarf2_locexpr_index
);
24890 SYMBOL_LOCATION_BATON (sym
) = baton
;
24894 /* Return the OBJFILE associated with the compilation unit CU. If CU
24895 came from a separate debuginfo file, then the master objfile is
24899 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24901 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24903 /* Return the master objfile, so that we can report and look up the
24904 correct file containing this variable. */
24905 if (objfile
->separate_debug_objfile_backlink
)
24906 objfile
= objfile
->separate_debug_objfile_backlink
;
24911 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24912 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24913 CU_HEADERP first. */
24915 static const struct comp_unit_head
*
24916 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24917 struct dwarf2_per_cu_data
*per_cu
)
24919 const gdb_byte
*info_ptr
;
24922 return &per_cu
->cu
->header
;
24924 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24926 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24927 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24928 rcuh_kind::COMPILE
);
24933 /* Return the address size given in the compilation unit header for CU. */
24936 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24938 struct comp_unit_head cu_header_local
;
24939 const struct comp_unit_head
*cu_headerp
;
24941 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24943 return cu_headerp
->addr_size
;
24946 /* Return the offset size given in the compilation unit header for CU. */
24949 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24951 struct comp_unit_head cu_header_local
;
24952 const struct comp_unit_head
*cu_headerp
;
24954 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24956 return cu_headerp
->offset_size
;
24959 /* See its dwarf2loc.h declaration. */
24962 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24964 struct comp_unit_head cu_header_local
;
24965 const struct comp_unit_head
*cu_headerp
;
24967 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24969 if (cu_headerp
->version
== 2)
24970 return cu_headerp
->addr_size
;
24972 return cu_headerp
->offset_size
;
24975 /* Return the text offset of the CU. The returned offset comes from
24976 this CU's objfile. If this objfile came from a separate debuginfo
24977 file, then the offset may be different from the corresponding
24978 offset in the parent objfile. */
24981 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24983 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24985 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24988 /* Return DWARF version number of PER_CU. */
24991 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24993 return per_cu
->dwarf_version
;
24996 /* Locate the .debug_info compilation unit from CU's objfile which contains
24997 the DIE at OFFSET. Raises an error on failure. */
24999 static struct dwarf2_per_cu_data
*
25000 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25001 unsigned int offset_in_dwz
,
25002 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25004 struct dwarf2_per_cu_data
*this_cu
;
25006 const sect_offset
*cu_off
;
25009 high
= dwarf2_per_objfile
->n_comp_units
- 1;
25012 struct dwarf2_per_cu_data
*mid_cu
;
25013 int mid
= low
+ (high
- low
) / 2;
25015 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25016 cu_off
= &mid_cu
->sect_off
;
25017 if (mid_cu
->is_dwz
> offset_in_dwz
25018 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
25023 gdb_assert (low
== high
);
25024 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25025 cu_off
= &this_cu
->sect_off
;
25026 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
25028 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25029 error (_("Dwarf Error: could not find partial DIE containing "
25030 "offset %s [in module %s]"),
25031 sect_offset_str (sect_off
),
25032 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25034 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25036 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25040 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25041 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
25042 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25043 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25044 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25049 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25051 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25052 : per_cu (per_cu_
),
25055 checked_producer (0),
25056 producer_is_gxx_lt_4_6 (0),
25057 producer_is_gcc_lt_4_3 (0),
25058 producer_is_icc_lt_14 (0),
25059 processing_has_namespace_info (0)
25064 /* Destroy a dwarf2_cu. */
25066 dwarf2_cu::~dwarf2_cu ()
25071 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25074 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25075 enum language pretend_language
)
25077 struct attribute
*attr
;
25079 /* Set the language we're debugging. */
25080 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25082 set_cu_language (DW_UNSND (attr
), cu
);
25085 cu
->language
= pretend_language
;
25086 cu
->language_defn
= language_def (cu
->language
);
25089 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25092 /* Increase the age counter on each cached compilation unit, and free
25093 any that are too old. */
25096 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25098 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25100 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25101 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25102 while (per_cu
!= NULL
)
25104 per_cu
->cu
->last_used
++;
25105 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25106 dwarf2_mark (per_cu
->cu
);
25107 per_cu
= per_cu
->cu
->read_in_chain
;
25110 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25111 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25112 while (per_cu
!= NULL
)
25114 struct dwarf2_per_cu_data
*next_cu
;
25116 next_cu
= per_cu
->cu
->read_in_chain
;
25118 if (!per_cu
->cu
->mark
)
25121 *last_chain
= next_cu
;
25124 last_chain
= &per_cu
->cu
->read_in_chain
;
25130 /* Remove a single compilation unit from the cache. */
25133 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25135 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25136 struct dwarf2_per_objfile
*dwarf2_per_objfile
25137 = target_per_cu
->dwarf2_per_objfile
;
25139 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25140 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25141 while (per_cu
!= NULL
)
25143 struct dwarf2_per_cu_data
*next_cu
;
25145 next_cu
= per_cu
->cu
->read_in_chain
;
25147 if (per_cu
== target_per_cu
)
25151 *last_chain
= next_cu
;
25155 last_chain
= &per_cu
->cu
->read_in_chain
;
25161 /* Release all extra memory associated with OBJFILE. */
25164 dwarf2_free_objfile (struct objfile
*objfile
)
25166 struct dwarf2_per_objfile
*dwarf2_per_objfile
25167 = get_dwarf2_per_objfile (objfile
);
25169 delete dwarf2_per_objfile
;
25172 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25173 We store these in a hash table separate from the DIEs, and preserve them
25174 when the DIEs are flushed out of cache.
25176 The CU "per_cu" pointer is needed because offset alone is not enough to
25177 uniquely identify the type. A file may have multiple .debug_types sections,
25178 or the type may come from a DWO file. Furthermore, while it's more logical
25179 to use per_cu->section+offset, with Fission the section with the data is in
25180 the DWO file but we don't know that section at the point we need it.
25181 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25182 because we can enter the lookup routine, get_die_type_at_offset, from
25183 outside this file, and thus won't necessarily have PER_CU->cu.
25184 Fortunately, PER_CU is stable for the life of the objfile. */
25186 struct dwarf2_per_cu_offset_and_type
25188 const struct dwarf2_per_cu_data
*per_cu
;
25189 sect_offset sect_off
;
25193 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25196 per_cu_offset_and_type_hash (const void *item
)
25198 const struct dwarf2_per_cu_offset_and_type
*ofs
25199 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25201 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25204 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25207 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25209 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25210 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25211 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25212 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25214 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25215 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25218 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25219 table if necessary. For convenience, return TYPE.
25221 The DIEs reading must have careful ordering to:
25222 * Not cause infite loops trying to read in DIEs as a prerequisite for
25223 reading current DIE.
25224 * Not trying to dereference contents of still incompletely read in types
25225 while reading in other DIEs.
25226 * Enable referencing still incompletely read in types just by a pointer to
25227 the type without accessing its fields.
25229 Therefore caller should follow these rules:
25230 * Try to fetch any prerequisite types we may need to build this DIE type
25231 before building the type and calling set_die_type.
25232 * After building type call set_die_type for current DIE as soon as
25233 possible before fetching more types to complete the current type.
25234 * Make the type as complete as possible before fetching more types. */
25236 static struct type
*
25237 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25239 struct dwarf2_per_objfile
*dwarf2_per_objfile
25240 = cu
->per_cu
->dwarf2_per_objfile
;
25241 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25242 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25243 struct attribute
*attr
;
25244 struct dynamic_prop prop
;
25246 /* For Ada types, make sure that the gnat-specific data is always
25247 initialized (if not already set). There are a few types where
25248 we should not be doing so, because the type-specific area is
25249 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25250 where the type-specific area is used to store the floatformat).
25251 But this is not a problem, because the gnat-specific information
25252 is actually not needed for these types. */
25253 if (need_gnat_info (cu
)
25254 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25255 && TYPE_CODE (type
) != TYPE_CODE_FLT
25256 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25257 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25258 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25259 && !HAVE_GNAT_AUX_INFO (type
))
25260 INIT_GNAT_SPECIFIC (type
);
25262 /* Read DW_AT_allocated and set in type. */
25263 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25264 if (attr_form_is_block (attr
))
25266 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25267 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25269 else if (attr
!= NULL
)
25271 complaint (&symfile_complaints
,
25272 _("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25273 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25274 sect_offset_str (die
->sect_off
));
25277 /* Read DW_AT_associated and set in type. */
25278 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25279 if (attr_form_is_block (attr
))
25281 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25282 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25284 else if (attr
!= NULL
)
25286 complaint (&symfile_complaints
,
25287 _("DW_AT_associated has the wrong form (%s) at DIE %s"),
25288 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25289 sect_offset_str (die
->sect_off
));
25292 /* Read DW_AT_data_location and set in type. */
25293 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25294 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25295 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25297 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25299 dwarf2_per_objfile
->die_type_hash
=
25300 htab_create_alloc_ex (127,
25301 per_cu_offset_and_type_hash
,
25302 per_cu_offset_and_type_eq
,
25304 &objfile
->objfile_obstack
,
25305 hashtab_obstack_allocate
,
25306 dummy_obstack_deallocate
);
25309 ofs
.per_cu
= cu
->per_cu
;
25310 ofs
.sect_off
= die
->sect_off
;
25312 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25313 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25315 complaint (&symfile_complaints
,
25316 _("A problem internal to GDB: DIE %s has type already set"),
25317 sect_offset_str (die
->sect_off
));
25318 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25319 struct dwarf2_per_cu_offset_and_type
);
25324 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25325 or return NULL if the die does not have a saved type. */
25327 static struct type
*
25328 get_die_type_at_offset (sect_offset sect_off
,
25329 struct dwarf2_per_cu_data
*per_cu
)
25331 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25332 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25334 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25337 ofs
.per_cu
= per_cu
;
25338 ofs
.sect_off
= sect_off
;
25339 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25340 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25347 /* Look up the type for DIE in CU in die_type_hash,
25348 or return NULL if DIE does not have a saved type. */
25350 static struct type
*
25351 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25353 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25356 /* Add a dependence relationship from CU to REF_PER_CU. */
25359 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25360 struct dwarf2_per_cu_data
*ref_per_cu
)
25364 if (cu
->dependencies
== NULL
)
25366 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25367 NULL
, &cu
->comp_unit_obstack
,
25368 hashtab_obstack_allocate
,
25369 dummy_obstack_deallocate
);
25371 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25373 *slot
= ref_per_cu
;
25376 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25377 Set the mark field in every compilation unit in the
25378 cache that we must keep because we are keeping CU. */
25381 dwarf2_mark_helper (void **slot
, void *data
)
25383 struct dwarf2_per_cu_data
*per_cu
;
25385 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25387 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25388 reading of the chain. As such dependencies remain valid it is not much
25389 useful to track and undo them during QUIT cleanups. */
25390 if (per_cu
->cu
== NULL
)
25393 if (per_cu
->cu
->mark
)
25395 per_cu
->cu
->mark
= 1;
25397 if (per_cu
->cu
->dependencies
!= NULL
)
25398 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25403 /* Set the mark field in CU and in every other compilation unit in the
25404 cache that we must keep because we are keeping CU. */
25407 dwarf2_mark (struct dwarf2_cu
*cu
)
25412 if (cu
->dependencies
!= NULL
)
25413 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25417 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25421 per_cu
->cu
->mark
= 0;
25422 per_cu
= per_cu
->cu
->read_in_chain
;
25426 /* Trivial hash function for partial_die_info: the hash value of a DIE
25427 is its offset in .debug_info for this objfile. */
25430 partial_die_hash (const void *item
)
25432 const struct partial_die_info
*part_die
25433 = (const struct partial_die_info
*) item
;
25435 return to_underlying (part_die
->sect_off
);
25438 /* Trivial comparison function for partial_die_info structures: two DIEs
25439 are equal if they have the same offset. */
25442 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25444 const struct partial_die_info
*part_die_lhs
25445 = (const struct partial_die_info
*) item_lhs
;
25446 const struct partial_die_info
*part_die_rhs
25447 = (const struct partial_die_info
*) item_rhs
;
25449 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25452 static struct cmd_list_element
*set_dwarf_cmdlist
;
25453 static struct cmd_list_element
*show_dwarf_cmdlist
;
25456 set_dwarf_cmd (const char *args
, int from_tty
)
25458 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25463 show_dwarf_cmd (const char *args
, int from_tty
)
25465 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25468 int dwarf_always_disassemble
;
25471 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25472 struct cmd_list_element
*c
, const char *value
)
25474 fprintf_filtered (file
,
25475 _("Whether to always disassemble "
25476 "DWARF expressions is %s.\n"),
25481 show_check_physname (struct ui_file
*file
, int from_tty
,
25482 struct cmd_list_element
*c
, const char *value
)
25484 fprintf_filtered (file
,
25485 _("Whether to check \"physname\" is %s.\n"),
25490 _initialize_dwarf2_read (void)
25493 dwarf2_objfile_data_key
= register_objfile_data ();
25495 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25496 Set DWARF specific variables.\n\
25497 Configure DWARF variables such as the cache size"),
25498 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25499 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25501 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25502 Show DWARF specific variables\n\
25503 Show DWARF variables such as the cache size"),
25504 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25505 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25507 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25508 &dwarf_max_cache_age
, _("\
25509 Set the upper bound on the age of cached DWARF compilation units."), _("\
25510 Show the upper bound on the age of cached DWARF compilation units."), _("\
25511 A higher limit means that cached compilation units will be stored\n\
25512 in memory longer, and more total memory will be used. Zero disables\n\
25513 caching, which can slow down startup."),
25515 show_dwarf_max_cache_age
,
25516 &set_dwarf_cmdlist
,
25517 &show_dwarf_cmdlist
);
25519 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25520 &dwarf_always_disassemble
, _("\
25521 Set whether `info address' always disassembles DWARF expressions."), _("\
25522 Show whether `info address' always disassembles DWARF expressions."), _("\
25523 When enabled, DWARF expressions are always printed in an assembly-like\n\
25524 syntax. When disabled, expressions will be printed in a more\n\
25525 conversational style, when possible."),
25527 show_dwarf_always_disassemble
,
25528 &set_dwarf_cmdlist
,
25529 &show_dwarf_cmdlist
);
25531 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25532 Set debugging of the DWARF reader."), _("\
25533 Show debugging of the DWARF reader."), _("\
25534 When enabled (non-zero), debugging messages are printed during DWARF\n\
25535 reading and symtab expansion. A value of 1 (one) provides basic\n\
25536 information. A value greater than 1 provides more verbose information."),
25539 &setdebuglist
, &showdebuglist
);
25541 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25542 Set debugging of the DWARF DIE reader."), _("\
25543 Show debugging of the DWARF DIE reader."), _("\
25544 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25545 The value is the maximum depth to print."),
25548 &setdebuglist
, &showdebuglist
);
25550 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25551 Set debugging of the dwarf line reader."), _("\
25552 Show debugging of the dwarf line reader."), _("\
25553 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25554 A value of 1 (one) provides basic information.\n\
25555 A value greater than 1 provides more verbose information."),
25558 &setdebuglist
, &showdebuglist
);
25560 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25561 Set cross-checking of \"physname\" code against demangler."), _("\
25562 Show cross-checking of \"physname\" code against demangler."), _("\
25563 When enabled, GDB's internal \"physname\" code is checked against\n\
25565 NULL
, show_check_physname
,
25566 &setdebuglist
, &showdebuglist
);
25568 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25569 no_class
, &use_deprecated_index_sections
, _("\
25570 Set whether to use deprecated gdb_index sections."), _("\
25571 Show whether to use deprecated gdb_index sections."), _("\
25572 When enabled, deprecated .gdb_index sections are used anyway.\n\
25573 Normally they are ignored either because of a missing feature or\n\
25574 performance issue.\n\
25575 Warning: This option must be enabled before gdb reads the file."),
25578 &setlist
, &showlist
);
25580 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25581 &dwarf2_locexpr_funcs
);
25582 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25583 &dwarf2_loclist_funcs
);
25585 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25586 &dwarf2_block_frame_base_locexpr_funcs
);
25587 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25588 &dwarf2_block_frame_base_loclist_funcs
);
25591 selftests::register_test ("dw2_expand_symtabs_matching",
25592 selftests::dw2_expand_symtabs_matching::run_test
);