1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2019 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-cache.h"
34 #include "dwarf-index-common.h"
43 #include "gdb-demangle.h"
44 #include "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
48 #include "dwarf2expr.h"
49 #include "dwarf2loc.h"
50 #include "cp-support.h"
56 #include "typeprint.h"
61 #include "gdbcore.h" /* for gnutarget */
62 #include "gdb/gdb-index.h"
67 #include "namespace.h"
68 #include "gdbsupport/function-view.h"
69 #include "gdbsupport/gdb_optional.h"
70 #include "gdbsupport/underlying.h"
71 #include "gdbsupport/hash_enum.h"
72 #include "filename-seen-cache.h"
76 #include <unordered_map>
77 #include "gdbsupport/selftest.h"
78 #include "rust-lang.h"
79 #include "gdbsupport/pathstuff.h"
81 /* When == 1, print basic high level tracing messages.
82 When > 1, be more verbose.
83 This is in contrast to the low level DIE reading of dwarf_die_debug. */
84 static unsigned int dwarf_read_debug
= 0;
86 /* When non-zero, dump DIEs after they are read in. */
87 static unsigned int dwarf_die_debug
= 0;
89 /* When non-zero, dump line number entries as they are read in. */
90 static unsigned int dwarf_line_debug
= 0;
92 /* When true, cross-check physname against demangler. */
93 static bool check_physname
= false;
95 /* When true, do not reject deprecated .gdb_index sections. */
96 static bool use_deprecated_index_sections
= false;
98 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
100 /* The "aclass" indices for various kinds of computed DWARF symbols. */
102 static int dwarf2_locexpr_index
;
103 static int dwarf2_loclist_index
;
104 static int dwarf2_locexpr_block_index
;
105 static int dwarf2_loclist_block_index
;
107 /* An index into a (C++) symbol name component in a symbol name as
108 recorded in the mapped_index's symbol table. For each C++ symbol
109 in the symbol table, we record one entry for the start of each
110 component in the symbol in a table of name components, and then
111 sort the table, in order to be able to binary search symbol names,
112 ignoring leading namespaces, both completion and regular look up.
113 For example, for symbol "A::B::C", we'll have an entry that points
114 to "A::B::C", another that points to "B::C", and another for "C".
115 Note that function symbols in GDB index have no parameter
116 information, just the function/method names. You can convert a
117 name_component to a "const char *" using the
118 'mapped_index::symbol_name_at(offset_type)' method. */
120 struct name_component
122 /* Offset in the symbol name where the component starts. Stored as
123 a (32-bit) offset instead of a pointer to save memory and improve
124 locality on 64-bit architectures. */
125 offset_type name_offset
;
127 /* The symbol's index in the symbol and constant pool tables of a
132 /* Base class containing bits shared by both .gdb_index and
133 .debug_name indexes. */
135 struct mapped_index_base
137 mapped_index_base () = default;
138 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
140 /* The name_component table (a sorted vector). See name_component's
141 description above. */
142 std::vector
<name_component
> name_components
;
144 /* How NAME_COMPONENTS is sorted. */
145 enum case_sensitivity name_components_casing
;
147 /* Return the number of names in the symbol table. */
148 virtual size_t symbol_name_count () const = 0;
150 /* Get the name of the symbol at IDX in the symbol table. */
151 virtual const char *symbol_name_at (offset_type idx
) const = 0;
153 /* Return whether the name at IDX in the symbol table should be
155 virtual bool symbol_name_slot_invalid (offset_type idx
) const
160 /* Build the symbol name component sorted vector, if we haven't
162 void build_name_components ();
164 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
165 possible matches for LN_NO_PARAMS in the name component
167 std::pair
<std::vector
<name_component
>::const_iterator
,
168 std::vector
<name_component
>::const_iterator
>
169 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
170 enum language lang
) const;
172 /* Prevent deleting/destroying via a base class pointer. */
174 ~mapped_index_base() = default;
177 /* A description of the mapped index. The file format is described in
178 a comment by the code that writes the index. */
179 struct mapped_index final
: public mapped_index_base
181 /* A slot/bucket in the symbol table hash. */
182 struct symbol_table_slot
184 const offset_type name
;
185 const offset_type vec
;
188 /* Index data format version. */
191 /* The address table data. */
192 gdb::array_view
<const gdb_byte
> address_table
;
194 /* The symbol table, implemented as a hash table. */
195 gdb::array_view
<symbol_table_slot
> symbol_table
;
197 /* A pointer to the constant pool. */
198 const char *constant_pool
= nullptr;
200 bool symbol_name_slot_invalid (offset_type idx
) const override
202 const auto &bucket
= this->symbol_table
[idx
];
203 return bucket
.name
== 0 && bucket
.vec
== 0;
206 /* Convenience method to get at the name of the symbol at IDX in the
208 const char *symbol_name_at (offset_type idx
) const override
209 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
211 size_t symbol_name_count () const override
212 { return this->symbol_table
.size (); }
215 /* A description of the mapped .debug_names.
216 Uninitialized map has CU_COUNT 0. */
217 struct mapped_debug_names final
: public mapped_index_base
219 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
220 : dwarf2_per_objfile (dwarf2_per_objfile_
)
223 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
224 bfd_endian dwarf5_byte_order
;
225 bool dwarf5_is_dwarf64
;
226 bool augmentation_is_gdb
;
228 uint32_t cu_count
= 0;
229 uint32_t tu_count
, bucket_count
, name_count
;
230 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
231 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
232 const gdb_byte
*name_table_string_offs_reordered
;
233 const gdb_byte
*name_table_entry_offs_reordered
;
234 const gdb_byte
*entry_pool
;
241 /* Attribute name DW_IDX_*. */
244 /* Attribute form DW_FORM_*. */
247 /* Value if FORM is DW_FORM_implicit_const. */
248 LONGEST implicit_const
;
250 std::vector
<attr
> attr_vec
;
253 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
255 const char *namei_to_name (uint32_t namei
) const;
257 /* Implementation of the mapped_index_base virtual interface, for
258 the name_components cache. */
260 const char *symbol_name_at (offset_type idx
) const override
261 { return namei_to_name (idx
); }
263 size_t symbol_name_count () const override
264 { return this->name_count
; }
267 /* See dwarf2read.h. */
270 get_dwarf2_per_objfile (struct objfile
*objfile
)
272 return dwarf2_objfile_data_key
.get (objfile
);
275 /* Default names of the debugging sections. */
277 /* Note that if the debugging section has been compressed, it might
278 have a name like .zdebug_info. */
280 static const struct dwarf2_debug_sections dwarf2_elf_names
=
282 { ".debug_info", ".zdebug_info" },
283 { ".debug_abbrev", ".zdebug_abbrev" },
284 { ".debug_line", ".zdebug_line" },
285 { ".debug_loc", ".zdebug_loc" },
286 { ".debug_loclists", ".zdebug_loclists" },
287 { ".debug_macinfo", ".zdebug_macinfo" },
288 { ".debug_macro", ".zdebug_macro" },
289 { ".debug_str", ".zdebug_str" },
290 { ".debug_line_str", ".zdebug_line_str" },
291 { ".debug_ranges", ".zdebug_ranges" },
292 { ".debug_rnglists", ".zdebug_rnglists" },
293 { ".debug_types", ".zdebug_types" },
294 { ".debug_addr", ".zdebug_addr" },
295 { ".debug_frame", ".zdebug_frame" },
296 { ".eh_frame", NULL
},
297 { ".gdb_index", ".zgdb_index" },
298 { ".debug_names", ".zdebug_names" },
299 { ".debug_aranges", ".zdebug_aranges" },
303 /* List of DWO/DWP sections. */
305 static const struct dwop_section_names
307 struct dwarf2_section_names abbrev_dwo
;
308 struct dwarf2_section_names info_dwo
;
309 struct dwarf2_section_names line_dwo
;
310 struct dwarf2_section_names loc_dwo
;
311 struct dwarf2_section_names loclists_dwo
;
312 struct dwarf2_section_names macinfo_dwo
;
313 struct dwarf2_section_names macro_dwo
;
314 struct dwarf2_section_names str_dwo
;
315 struct dwarf2_section_names str_offsets_dwo
;
316 struct dwarf2_section_names types_dwo
;
317 struct dwarf2_section_names cu_index
;
318 struct dwarf2_section_names tu_index
;
322 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
323 { ".debug_info.dwo", ".zdebug_info.dwo" },
324 { ".debug_line.dwo", ".zdebug_line.dwo" },
325 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
326 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
327 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
328 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
329 { ".debug_str.dwo", ".zdebug_str.dwo" },
330 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
331 { ".debug_types.dwo", ".zdebug_types.dwo" },
332 { ".debug_cu_index", ".zdebug_cu_index" },
333 { ".debug_tu_index", ".zdebug_tu_index" },
336 /* local data types */
338 /* The data in a compilation unit header, after target2host
339 translation, looks like this. */
340 struct comp_unit_head
344 unsigned char addr_size
;
345 unsigned char signed_addr_p
;
346 sect_offset abbrev_sect_off
;
348 /* Size of file offsets; either 4 or 8. */
349 unsigned int offset_size
;
351 /* Size of the length field; either 4 or 12. */
352 unsigned int initial_length_size
;
354 enum dwarf_unit_type unit_type
;
356 /* Offset to the first byte of this compilation unit header in the
357 .debug_info section, for resolving relative reference dies. */
358 sect_offset sect_off
;
360 /* Offset to first die in this cu from the start of the cu.
361 This will be the first byte following the compilation unit header. */
362 cu_offset first_die_cu_offset
;
365 /* 64-bit signature of this unit. For type units, it denotes the signature of
366 the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5).
367 Also used in DWARF 5, to denote the dwo id when the unit type is
368 DW_UT_skeleton or DW_UT_split_compile. */
371 /* For types, offset in the type's DIE of the type defined by this TU. */
372 cu_offset type_cu_offset_in_tu
;
375 /* Type used for delaying computation of method physnames.
376 See comments for compute_delayed_physnames. */
377 struct delayed_method_info
379 /* The type to which the method is attached, i.e., its parent class. */
382 /* The index of the method in the type's function fieldlists. */
385 /* The index of the method in the fieldlist. */
388 /* The name of the DIE. */
391 /* The DIE associated with this method. */
392 struct die_info
*die
;
395 /* Internal state when decoding a particular compilation unit. */
398 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
401 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
403 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
404 Create the set of symtabs used by this TU, or if this TU is sharing
405 symtabs with another TU and the symtabs have already been created
406 then restore those symtabs in the line header.
407 We don't need the pc/line-number mapping for type units. */
408 void setup_type_unit_groups (struct die_info
*die
);
410 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
411 buildsym_compunit constructor. */
412 struct compunit_symtab
*start_symtab (const char *name
,
413 const char *comp_dir
,
416 /* Reset the builder. */
417 void reset_builder () { m_builder
.reset (); }
419 /* The header of the compilation unit. */
420 struct comp_unit_head header
{};
422 /* Base address of this compilation unit. */
423 CORE_ADDR base_address
= 0;
425 /* Non-zero if base_address has been set. */
428 /* The language we are debugging. */
429 enum language language
= language_unknown
;
430 const struct language_defn
*language_defn
= nullptr;
432 const char *producer
= nullptr;
435 /* The symtab builder for this CU. This is only non-NULL when full
436 symbols are being read. */
437 std::unique_ptr
<buildsym_compunit
> m_builder
;
440 /* The generic symbol table building routines have separate lists for
441 file scope symbols and all all other scopes (local scopes). So
442 we need to select the right one to pass to add_symbol_to_list().
443 We do it by keeping a pointer to the correct list in list_in_scope.
445 FIXME: The original dwarf code just treated the file scope as the
446 first local scope, and all other local scopes as nested local
447 scopes, and worked fine. Check to see if we really need to
448 distinguish these in buildsym.c. */
449 struct pending
**list_in_scope
= nullptr;
451 /* Hash table holding all the loaded partial DIEs
452 with partial_die->offset.SECT_OFF as hash. */
453 htab_t partial_dies
= nullptr;
455 /* Storage for things with the same lifetime as this read-in compilation
456 unit, including partial DIEs. */
457 auto_obstack comp_unit_obstack
;
459 /* When multiple dwarf2_cu structures are living in memory, this field
460 chains them all together, so that they can be released efficiently.
461 We will probably also want a generation counter so that most-recently-used
462 compilation units are cached... */
463 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
465 /* Backlink to our per_cu entry. */
466 struct dwarf2_per_cu_data
*per_cu
;
468 /* How many compilation units ago was this CU last referenced? */
471 /* A hash table of DIE cu_offset for following references with
472 die_info->offset.sect_off as hash. */
473 htab_t die_hash
= nullptr;
475 /* Full DIEs if read in. */
476 struct die_info
*dies
= nullptr;
478 /* A set of pointers to dwarf2_per_cu_data objects for compilation
479 units referenced by this one. Only set during full symbol processing;
480 partial symbol tables do not have dependencies. */
481 htab_t dependencies
= nullptr;
483 /* Header data from the line table, during full symbol processing. */
484 struct line_header
*line_header
= nullptr;
485 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
486 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
487 this is the DW_TAG_compile_unit die for this CU. We'll hold on
488 to the line header as long as this DIE is being processed. See
489 process_die_scope. */
490 die_info
*line_header_die_owner
= nullptr;
492 /* A list of methods which need to have physnames computed
493 after all type information has been read. */
494 std::vector
<delayed_method_info
> method_list
;
496 /* To be copied to symtab->call_site_htab. */
497 htab_t call_site_htab
= nullptr;
499 /* Non-NULL if this CU came from a DWO file.
500 There is an invariant here that is important to remember:
501 Except for attributes copied from the top level DIE in the "main"
502 (or "stub") file in preparation for reading the DWO file
503 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
504 Either there isn't a DWO file (in which case this is NULL and the point
505 is moot), or there is and either we're not going to read it (in which
506 case this is NULL) or there is and we are reading it (in which case this
508 struct dwo_unit
*dwo_unit
= nullptr;
510 /* The DW_AT_addr_base attribute if present, zero otherwise
511 (zero is a valid value though).
512 Note this value comes from the Fission stub CU/TU's DIE. */
513 ULONGEST addr_base
= 0;
515 /* The DW_AT_ranges_base attribute if present, zero otherwise
516 (zero is a valid value though).
517 Note this value comes from the Fission stub CU/TU's DIE.
518 Also note that the value is zero in the non-DWO case so this value can
519 be used without needing to know whether DWO files are in use or not.
520 N.B. This does not apply to DW_AT_ranges appearing in
521 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
522 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
523 DW_AT_ranges_base *would* have to be applied, and we'd have to care
524 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
525 ULONGEST ranges_base
= 0;
527 /* When reading debug info generated by older versions of rustc, we
528 have to rewrite some union types to be struct types with a
529 variant part. This rewriting must be done after the CU is fully
530 read in, because otherwise at the point of rewriting some struct
531 type might not have been fully processed. So, we keep a list of
532 all such types here and process them after expansion. */
533 std::vector
<struct type
*> rust_unions
;
535 /* Mark used when releasing cached dies. */
538 /* This CU references .debug_loc. See the symtab->locations_valid field.
539 This test is imperfect as there may exist optimized debug code not using
540 any location list and still facing inlining issues if handled as
541 unoptimized code. For a future better test see GCC PR other/32998. */
542 bool has_loclist
: 1;
544 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
545 if all the producer_is_* fields are valid. This information is cached
546 because profiling CU expansion showed excessive time spent in
547 producer_is_gxx_lt_4_6. */
548 bool checked_producer
: 1;
549 bool producer_is_gxx_lt_4_6
: 1;
550 bool producer_is_gcc_lt_4_3
: 1;
551 bool producer_is_icc
: 1;
552 bool producer_is_icc_lt_14
: 1;
553 bool producer_is_codewarrior
: 1;
555 /* When true, the file that we're processing is known to have
556 debugging info for C++ namespaces. GCC 3.3.x did not produce
557 this information, but later versions do. */
559 bool processing_has_namespace_info
: 1;
561 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
563 /* If this CU was inherited by another CU (via specification,
564 abstract_origin, etc), this is the ancestor CU. */
567 /* Get the buildsym_compunit for this CU. */
568 buildsym_compunit
*get_builder ()
570 /* If this CU has a builder associated with it, use that. */
571 if (m_builder
!= nullptr)
572 return m_builder
.get ();
574 /* Otherwise, search ancestors for a valid builder. */
575 if (ancestor
!= nullptr)
576 return ancestor
->get_builder ();
582 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
583 This includes type_unit_group and quick_file_names. */
585 struct stmt_list_hash
587 /* The DWO unit this table is from or NULL if there is none. */
588 struct dwo_unit
*dwo_unit
;
590 /* Offset in .debug_line or .debug_line.dwo. */
591 sect_offset line_sect_off
;
594 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
595 an object of this type. */
597 struct type_unit_group
599 /* dwarf2read.c's main "handle" on a TU symtab.
600 To simplify things we create an artificial CU that "includes" all the
601 type units using this stmt_list so that the rest of the code still has
602 a "per_cu" handle on the symtab.
603 This PER_CU is recognized by having no section. */
604 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
605 struct dwarf2_per_cu_data per_cu
;
607 /* The TUs that share this DW_AT_stmt_list entry.
608 This is added to while parsing type units to build partial symtabs,
609 and is deleted afterwards and not used again. */
610 std::vector
<signatured_type
*> *tus
;
612 /* The compunit symtab.
613 Type units in a group needn't all be defined in the same source file,
614 so we create an essentially anonymous symtab as the compunit symtab. */
615 struct compunit_symtab
*compunit_symtab
;
617 /* The data used to construct the hash key. */
618 struct stmt_list_hash hash
;
620 /* The number of symtabs from the line header.
621 The value here must match line_header.num_file_names. */
622 unsigned int num_symtabs
;
624 /* The symbol tables for this TU (obtained from the files listed in
626 WARNING: The order of entries here must match the order of entries
627 in the line header. After the first TU using this type_unit_group, the
628 line header for the subsequent TUs is recreated from this. This is done
629 because we need to use the same symtabs for each TU using the same
630 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
631 there's no guarantee the line header doesn't have duplicate entries. */
632 struct symtab
**symtabs
;
635 /* These sections are what may appear in a (real or virtual) DWO file. */
639 struct dwarf2_section_info abbrev
;
640 struct dwarf2_section_info line
;
641 struct dwarf2_section_info loc
;
642 struct dwarf2_section_info loclists
;
643 struct dwarf2_section_info macinfo
;
644 struct dwarf2_section_info macro
;
645 struct dwarf2_section_info str
;
646 struct dwarf2_section_info str_offsets
;
647 /* In the case of a virtual DWO file, these two are unused. */
648 struct dwarf2_section_info info
;
649 std::vector
<dwarf2_section_info
> types
;
652 /* CUs/TUs in DWP/DWO files. */
656 /* Backlink to the containing struct dwo_file. */
657 struct dwo_file
*dwo_file
;
659 /* The "id" that distinguishes this CU/TU.
660 .debug_info calls this "dwo_id", .debug_types calls this "signature".
661 Since signatures came first, we stick with it for consistency. */
664 /* The section this CU/TU lives in, in the DWO file. */
665 struct dwarf2_section_info
*section
;
667 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
668 sect_offset sect_off
;
671 /* For types, offset in the type's DIE of the type defined by this TU. */
672 cu_offset type_offset_in_tu
;
675 /* include/dwarf2.h defines the DWP section codes.
676 It defines a max value but it doesn't define a min value, which we
677 use for error checking, so provide one. */
679 enum dwp_v2_section_ids
684 /* Data for one DWO file.
686 This includes virtual DWO files (a virtual DWO file is a DWO file as it
687 appears in a DWP file). DWP files don't really have DWO files per se -
688 comdat folding of types "loses" the DWO file they came from, and from
689 a high level view DWP files appear to contain a mass of random types.
690 However, to maintain consistency with the non-DWP case we pretend DWP
691 files contain virtual DWO files, and we assign each TU with one virtual
692 DWO file (generally based on the line and abbrev section offsets -
693 a heuristic that seems to work in practice). */
697 dwo_file () = default;
698 DISABLE_COPY_AND_ASSIGN (dwo_file
);
700 /* The DW_AT_GNU_dwo_name attribute.
701 For virtual DWO files the name is constructed from the section offsets
702 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
703 from related CU+TUs. */
704 const char *dwo_name
= nullptr;
706 /* The DW_AT_comp_dir attribute. */
707 const char *comp_dir
= nullptr;
709 /* The bfd, when the file is open. Otherwise this is NULL.
710 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
711 gdb_bfd_ref_ptr dbfd
;
713 /* The sections that make up this DWO file.
714 Remember that for virtual DWO files in DWP V2, these are virtual
715 sections (for lack of a better name). */
716 struct dwo_sections sections
{};
718 /* The CUs in the file.
719 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
720 an extension to handle LLVM's Link Time Optimization output (where
721 multiple source files may be compiled into a single object/dwo pair). */
724 /* Table of TUs in the file.
725 Each element is a struct dwo_unit. */
729 /* These sections are what may appear in a DWP file. */
733 /* These are used by both DWP version 1 and 2. */
734 struct dwarf2_section_info str
;
735 struct dwarf2_section_info cu_index
;
736 struct dwarf2_section_info tu_index
;
738 /* These are only used by DWP version 2 files.
739 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
740 sections are referenced by section number, and are not recorded here.
741 In DWP version 2 there is at most one copy of all these sections, each
742 section being (effectively) comprised of the concatenation of all of the
743 individual sections that exist in the version 1 format.
744 To keep the code simple we treat each of these concatenated pieces as a
745 section itself (a virtual section?). */
746 struct dwarf2_section_info abbrev
;
747 struct dwarf2_section_info info
;
748 struct dwarf2_section_info line
;
749 struct dwarf2_section_info loc
;
750 struct dwarf2_section_info macinfo
;
751 struct dwarf2_section_info macro
;
752 struct dwarf2_section_info str_offsets
;
753 struct dwarf2_section_info types
;
756 /* These sections are what may appear in a virtual DWO file in DWP version 1.
757 A virtual DWO file is a DWO file as it appears in a DWP file. */
759 struct virtual_v1_dwo_sections
761 struct dwarf2_section_info abbrev
;
762 struct dwarf2_section_info line
;
763 struct dwarf2_section_info loc
;
764 struct dwarf2_section_info macinfo
;
765 struct dwarf2_section_info macro
;
766 struct dwarf2_section_info str_offsets
;
767 /* Each DWP hash table entry records one CU or one TU.
768 That is recorded here, and copied to dwo_unit.section. */
769 struct dwarf2_section_info info_or_types
;
772 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
773 In version 2, the sections of the DWO files are concatenated together
774 and stored in one section of that name. Thus each ELF section contains
775 several "virtual" sections. */
777 struct virtual_v2_dwo_sections
779 bfd_size_type abbrev_offset
;
780 bfd_size_type abbrev_size
;
782 bfd_size_type line_offset
;
783 bfd_size_type line_size
;
785 bfd_size_type loc_offset
;
786 bfd_size_type loc_size
;
788 bfd_size_type macinfo_offset
;
789 bfd_size_type macinfo_size
;
791 bfd_size_type macro_offset
;
792 bfd_size_type macro_size
;
794 bfd_size_type str_offsets_offset
;
795 bfd_size_type str_offsets_size
;
797 /* Each DWP hash table entry records one CU or one TU.
798 That is recorded here, and copied to dwo_unit.section. */
799 bfd_size_type info_or_types_offset
;
800 bfd_size_type info_or_types_size
;
803 /* Contents of DWP hash tables. */
805 struct dwp_hash_table
807 uint32_t version
, nr_columns
;
808 uint32_t nr_units
, nr_slots
;
809 const gdb_byte
*hash_table
, *unit_table
;
814 const gdb_byte
*indices
;
818 /* This is indexed by column number and gives the id of the section
820 #define MAX_NR_V2_DWO_SECTIONS \
821 (1 /* .debug_info or .debug_types */ \
822 + 1 /* .debug_abbrev */ \
823 + 1 /* .debug_line */ \
824 + 1 /* .debug_loc */ \
825 + 1 /* .debug_str_offsets */ \
826 + 1 /* .debug_macro or .debug_macinfo */)
827 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
828 const gdb_byte
*offsets
;
829 const gdb_byte
*sizes
;
834 /* Data for one DWP file. */
838 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
840 dbfd (std::move (abfd
))
844 /* Name of the file. */
847 /* File format version. */
851 gdb_bfd_ref_ptr dbfd
;
853 /* Section info for this file. */
854 struct dwp_sections sections
{};
856 /* Table of CUs in the file. */
857 const struct dwp_hash_table
*cus
= nullptr;
859 /* Table of TUs in the file. */
860 const struct dwp_hash_table
*tus
= nullptr;
862 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
863 htab_t loaded_cus
{};
864 htab_t loaded_tus
{};
866 /* Table to map ELF section numbers to their sections.
867 This is only needed for the DWP V1 file format. */
868 unsigned int num_sections
= 0;
869 asection
**elf_sections
= nullptr;
872 /* Struct used to pass misc. parameters to read_die_and_children, et
873 al. which are used for both .debug_info and .debug_types dies.
874 All parameters here are unchanging for the life of the call. This
875 struct exists to abstract away the constant parameters of die reading. */
877 struct die_reader_specs
879 /* The bfd of die_section. */
882 /* The CU of the DIE we are parsing. */
883 struct dwarf2_cu
*cu
;
885 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
886 struct dwo_file
*dwo_file
;
888 /* The section the die comes from.
889 This is either .debug_info or .debug_types, or the .dwo variants. */
890 struct dwarf2_section_info
*die_section
;
892 /* die_section->buffer. */
893 const gdb_byte
*buffer
;
895 /* The end of the buffer. */
896 const gdb_byte
*buffer_end
;
898 /* The value of the DW_AT_comp_dir attribute. */
899 const char *comp_dir
;
901 /* The abbreviation table to use when reading the DIEs. */
902 struct abbrev_table
*abbrev_table
;
905 /* Type of function passed to init_cutu_and_read_dies, et.al. */
906 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
907 const gdb_byte
*info_ptr
,
908 struct die_info
*comp_unit_die
,
912 /* dir_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5 and
914 typedef int dir_index
;
916 /* file_name_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5
918 typedef int file_name_index
;
922 file_entry () = default;
924 file_entry (const char *name_
, dir_index d_index_
,
925 unsigned int mod_time_
, unsigned int length_
)
928 mod_time (mod_time_
),
932 /* Return the include directory at D_INDEX stored in LH. Returns
933 NULL if D_INDEX is out of bounds. */
934 const char *include_dir (const line_header
*lh
) const;
936 /* The file name. Note this is an observing pointer. The memory is
937 owned by debug_line_buffer. */
940 /* The directory index (1-based). */
941 dir_index d_index
{};
943 unsigned int mod_time
{};
945 unsigned int length
{};
947 /* True if referenced by the Line Number Program. */
950 /* The associated symbol table, if any. */
951 struct symtab
*symtab
{};
954 /* The line number information for a compilation unit (found in the
955 .debug_line section) begins with a "statement program header",
956 which contains the following information. */
963 /* Add an entry to the include directory table. */
964 void add_include_dir (const char *include_dir
);
966 /* Add an entry to the file name table. */
967 void add_file_name (const char *name
, dir_index d_index
,
968 unsigned int mod_time
, unsigned int length
);
970 /* Return the include dir at INDEX (0-based in DWARF 5 and 1-based before).
971 Returns NULL if INDEX is out of bounds. */
972 const char *include_dir_at (dir_index index
) const
978 vec_index
= index
- 1;
979 if (vec_index
< 0 || vec_index
>= m_include_dirs
.size ())
981 return m_include_dirs
[vec_index
];
984 bool is_valid_file_index (int file_index
)
987 return 0 <= file_index
&& file_index
< file_names_size ();
988 return 1 <= file_index
&& file_index
<= file_names_size ();
991 /* Return the file name at INDEX (0-based in DWARF 5 and 1-based before).
992 Returns NULL if INDEX is out of bounds. */
993 file_entry
*file_name_at (file_name_index index
)
999 vec_index
= index
- 1;
1000 if (vec_index
< 0 || vec_index
>= m_file_names
.size ())
1002 return &m_file_names
[vec_index
];
1005 /* The indexes are 0-based in DWARF 5 and 1-based in DWARF 4. Therefore,
1006 this method should only be used to iterate through all file entries in an
1007 index-agnostic manner. */
1008 std::vector
<file_entry
> &file_names ()
1009 { return m_file_names
; }
1011 /* Offset of line number information in .debug_line section. */
1012 sect_offset sect_off
{};
1014 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1015 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1017 unsigned int total_length
{};
1018 unsigned short version
{};
1019 unsigned int header_length
{};
1020 unsigned char minimum_instruction_length
{};
1021 unsigned char maximum_ops_per_instruction
{};
1022 unsigned char default_is_stmt
{};
1024 unsigned char line_range
{};
1025 unsigned char opcode_base
{};
1027 /* standard_opcode_lengths[i] is the number of operands for the
1028 standard opcode whose value is i. This means that
1029 standard_opcode_lengths[0] is unused, and the last meaningful
1030 element is standard_opcode_lengths[opcode_base - 1]. */
1031 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1033 int file_names_size ()
1034 { return m_file_names
.size(); }
1036 /* The start and end of the statement program following this
1037 header. These point into dwarf2_per_objfile->line_buffer. */
1038 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1041 /* The include_directories table. Note these are observing
1042 pointers. The memory is owned by debug_line_buffer. */
1043 std::vector
<const char *> m_include_dirs
;
1045 /* The file_names table. This is private because the meaning of indexes
1046 differs among DWARF versions (The first valid index is 1 in DWARF 4 and
1047 before, and is 0 in DWARF 5 and later). So the client should use
1048 file_name_at method for access. */
1049 std::vector
<file_entry
> m_file_names
;
1052 typedef std::unique_ptr
<line_header
> line_header_up
;
1055 file_entry::include_dir (const line_header
*lh
) const
1057 return lh
->include_dir_at (d_index
);
1060 /* When we construct a partial symbol table entry we only
1061 need this much information. */
1062 struct partial_die_info
: public allocate_on_obstack
1064 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1066 /* Disable assign but still keep copy ctor, which is needed
1067 load_partial_dies. */
1068 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1070 /* Adjust the partial die before generating a symbol for it. This
1071 function may set the is_external flag or change the DIE's
1073 void fixup (struct dwarf2_cu
*cu
);
1075 /* Read a minimal amount of information into the minimal die
1077 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1078 const struct abbrev_info
&abbrev
,
1079 const gdb_byte
*info_ptr
);
1081 /* Offset of this DIE. */
1082 const sect_offset sect_off
;
1084 /* DWARF-2 tag for this DIE. */
1085 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1087 /* Assorted flags describing the data found in this DIE. */
1088 const unsigned int has_children
: 1;
1090 unsigned int is_external
: 1;
1091 unsigned int is_declaration
: 1;
1092 unsigned int has_type
: 1;
1093 unsigned int has_specification
: 1;
1094 unsigned int has_pc_info
: 1;
1095 unsigned int may_be_inlined
: 1;
1097 /* This DIE has been marked DW_AT_main_subprogram. */
1098 unsigned int main_subprogram
: 1;
1100 /* Flag set if the SCOPE field of this structure has been
1102 unsigned int scope_set
: 1;
1104 /* Flag set if the DIE has a byte_size attribute. */
1105 unsigned int has_byte_size
: 1;
1107 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1108 unsigned int has_const_value
: 1;
1110 /* Flag set if any of the DIE's children are template arguments. */
1111 unsigned int has_template_arguments
: 1;
1113 /* Flag set if fixup has been called on this die. */
1114 unsigned int fixup_called
: 1;
1116 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1117 unsigned int is_dwz
: 1;
1119 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1120 unsigned int spec_is_dwz
: 1;
1122 /* The name of this DIE. Normally the value of DW_AT_name, but
1123 sometimes a default name for unnamed DIEs. */
1124 const char *name
= nullptr;
1126 /* The linkage name, if present. */
1127 const char *linkage_name
= nullptr;
1129 /* The scope to prepend to our children. This is generally
1130 allocated on the comp_unit_obstack, so will disappear
1131 when this compilation unit leaves the cache. */
1132 const char *scope
= nullptr;
1134 /* Some data associated with the partial DIE. The tag determines
1135 which field is live. */
1138 /* The location description associated with this DIE, if any. */
1139 struct dwarf_block
*locdesc
;
1140 /* The offset of an import, for DW_TAG_imported_unit. */
1141 sect_offset sect_off
;
1144 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1145 CORE_ADDR lowpc
= 0;
1146 CORE_ADDR highpc
= 0;
1148 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1149 DW_AT_sibling, if any. */
1150 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1151 could return DW_AT_sibling values to its caller load_partial_dies. */
1152 const gdb_byte
*sibling
= nullptr;
1154 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1155 DW_AT_specification (or DW_AT_abstract_origin or
1156 DW_AT_extension). */
1157 sect_offset spec_offset
{};
1159 /* Pointers to this DIE's parent, first child, and next sibling,
1161 struct partial_die_info
*die_parent
= nullptr;
1162 struct partial_die_info
*die_child
= nullptr;
1163 struct partial_die_info
*die_sibling
= nullptr;
1165 friend struct partial_die_info
*
1166 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1169 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1170 partial_die_info (sect_offset sect_off
)
1171 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1175 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1177 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1182 has_specification
= 0;
1185 main_subprogram
= 0;
1188 has_const_value
= 0;
1189 has_template_arguments
= 0;
1196 /* This data structure holds the information of an abbrev. */
1199 unsigned int number
; /* number identifying abbrev */
1200 enum dwarf_tag tag
; /* dwarf tag */
1201 unsigned short has_children
; /* boolean */
1202 unsigned short num_attrs
; /* number of attributes */
1203 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1204 struct abbrev_info
*next
; /* next in chain */
1209 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1210 ENUM_BITFIELD(dwarf_form
) form
: 16;
1212 /* It is valid only if FORM is DW_FORM_implicit_const. */
1213 LONGEST implicit_const
;
1216 /* Size of abbrev_table.abbrev_hash_table. */
1217 #define ABBREV_HASH_SIZE 121
1219 /* Top level data structure to contain an abbreviation table. */
1223 explicit abbrev_table (sect_offset off
)
1227 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1228 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1231 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1233 /* Allocate space for a struct abbrev_info object in
1235 struct abbrev_info
*alloc_abbrev ();
1237 /* Add an abbreviation to the table. */
1238 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1240 /* Look up an abbrev in the table.
1241 Returns NULL if the abbrev is not found. */
1243 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1246 /* Where the abbrev table came from.
1247 This is used as a sanity check when the table is used. */
1248 const sect_offset sect_off
;
1250 /* Storage for the abbrev table. */
1251 auto_obstack abbrev_obstack
;
1255 /* Hash table of abbrevs.
1256 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1257 It could be statically allocated, but the previous code didn't so we
1259 struct abbrev_info
**m_abbrevs
;
1262 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1264 /* Attributes have a name and a value. */
1267 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1268 ENUM_BITFIELD(dwarf_form
) form
: 15;
1270 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1271 field should be in u.str (existing only for DW_STRING) but it is kept
1272 here for better struct attribute alignment. */
1273 unsigned int string_is_canonical
: 1;
1278 struct dwarf_block
*blk
;
1287 /* This data structure holds a complete die structure. */
1290 /* DWARF-2 tag for this DIE. */
1291 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1293 /* Number of attributes */
1294 unsigned char num_attrs
;
1296 /* True if we're presently building the full type name for the
1297 type derived from this DIE. */
1298 unsigned char building_fullname
: 1;
1300 /* True if this die is in process. PR 16581. */
1301 unsigned char in_process
: 1;
1304 unsigned int abbrev
;
1306 /* Offset in .debug_info or .debug_types section. */
1307 sect_offset sect_off
;
1309 /* The dies in a compilation unit form an n-ary tree. PARENT
1310 points to this die's parent; CHILD points to the first child of
1311 this node; and all the children of a given node are chained
1312 together via their SIBLING fields. */
1313 struct die_info
*child
; /* Its first child, if any. */
1314 struct die_info
*sibling
; /* Its next sibling, if any. */
1315 struct die_info
*parent
; /* Its parent, if any. */
1317 /* An array of attributes, with NUM_ATTRS elements. There may be
1318 zero, but it's not common and zero-sized arrays are not
1319 sufficiently portable C. */
1320 struct attribute attrs
[1];
1323 /* Get at parts of an attribute structure. */
1325 #define DW_STRING(attr) ((attr)->u.str)
1326 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1327 #define DW_UNSND(attr) ((attr)->u.unsnd)
1328 #define DW_BLOCK(attr) ((attr)->u.blk)
1329 #define DW_SND(attr) ((attr)->u.snd)
1330 #define DW_ADDR(attr) ((attr)->u.addr)
1331 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1333 /* Blocks are a bunch of untyped bytes. */
1338 /* Valid only if SIZE is not zero. */
1339 const gdb_byte
*data
;
1342 #ifndef ATTR_ALLOC_CHUNK
1343 #define ATTR_ALLOC_CHUNK 4
1346 /* Allocate fields for structs, unions and enums in this size. */
1347 #ifndef DW_FIELD_ALLOC_CHUNK
1348 #define DW_FIELD_ALLOC_CHUNK 4
1351 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1352 but this would require a corresponding change in unpack_field_as_long
1354 static int bits_per_byte
= 8;
1356 /* When reading a variant or variant part, we track a bit more
1357 information about the field, and store it in an object of this
1360 struct variant_field
1362 /* If we see a DW_TAG_variant, then this will be the discriminant
1364 ULONGEST discriminant_value
;
1365 /* If we see a DW_TAG_variant, then this will be set if this is the
1367 bool default_branch
;
1368 /* While reading a DW_TAG_variant_part, this will be set if this
1369 field is the discriminant. */
1370 bool is_discriminant
;
1375 int accessibility
= 0;
1377 /* Extra information to describe a variant or variant part. */
1378 struct variant_field variant
{};
1379 struct field field
{};
1384 const char *name
= nullptr;
1385 std::vector
<struct fn_field
> fnfields
;
1388 /* The routines that read and process dies for a C struct or C++ class
1389 pass lists of data member fields and lists of member function fields
1390 in an instance of a field_info structure, as defined below. */
1393 /* List of data member and baseclasses fields. */
1394 std::vector
<struct nextfield
> fields
;
1395 std::vector
<struct nextfield
> baseclasses
;
1397 /* Number of fields (including baseclasses). */
1400 /* Set if the accessibility of one of the fields is not public. */
1401 int non_public_fields
= 0;
1403 /* Member function fieldlist array, contains name of possibly overloaded
1404 member function, number of overloaded member functions and a pointer
1405 to the head of the member function field chain. */
1406 std::vector
<struct fnfieldlist
> fnfieldlists
;
1408 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1409 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1410 std::vector
<struct decl_field
> typedef_field_list
;
1412 /* Nested types defined by this class and the number of elements in this
1414 std::vector
<struct decl_field
> nested_types_list
;
1417 /* One item on the queue of compilation units to read in full symbols
1419 struct dwarf2_queue_item
1421 struct dwarf2_per_cu_data
*per_cu
;
1422 enum language pretend_language
;
1423 struct dwarf2_queue_item
*next
;
1426 /* The current queue. */
1427 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1429 /* Loaded secondary compilation units are kept in memory until they
1430 have not been referenced for the processing of this many
1431 compilation units. Set this to zero to disable caching. Cache
1432 sizes of up to at least twenty will improve startup time for
1433 typical inter-CU-reference binaries, at an obvious memory cost. */
1434 static int dwarf_max_cache_age
= 5;
1436 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1437 struct cmd_list_element
*c
, const char *value
)
1439 fprintf_filtered (file
, _("The upper bound on the age of cached "
1440 "DWARF compilation units is %s.\n"),
1444 /* local function prototypes */
1446 static const char *get_section_name (const struct dwarf2_section_info
*);
1448 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1450 static void dwarf2_find_base_address (struct die_info
*die
,
1451 struct dwarf2_cu
*cu
);
1453 static struct partial_symtab
*create_partial_symtab
1454 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1456 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1457 const gdb_byte
*info_ptr
,
1458 struct die_info
*type_unit_die
,
1459 int has_children
, void *data
);
1461 static void dwarf2_build_psymtabs_hard
1462 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1464 static void scan_partial_symbols (struct partial_die_info
*,
1465 CORE_ADDR
*, CORE_ADDR
*,
1466 int, struct dwarf2_cu
*);
1468 static void add_partial_symbol (struct partial_die_info
*,
1469 struct dwarf2_cu
*);
1471 static void add_partial_namespace (struct partial_die_info
*pdi
,
1472 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1473 int set_addrmap
, struct dwarf2_cu
*cu
);
1475 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1476 CORE_ADDR
*highpc
, int set_addrmap
,
1477 struct dwarf2_cu
*cu
);
1479 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1480 struct dwarf2_cu
*cu
);
1482 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1483 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1484 int need_pc
, struct dwarf2_cu
*cu
);
1486 static void dwarf2_read_symtab (struct partial_symtab
*,
1489 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1491 static abbrev_table_up abbrev_table_read_table
1492 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1495 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1497 static struct partial_die_info
*load_partial_dies
1498 (const struct die_reader_specs
*, const gdb_byte
*, int);
1500 /* A pair of partial_die_info and compilation unit. */
1501 struct cu_partial_die_info
1503 /* The compilation unit of the partial_die_info. */
1504 struct dwarf2_cu
*cu
;
1505 /* A partial_die_info. */
1506 struct partial_die_info
*pdi
;
1508 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1514 cu_partial_die_info () = delete;
1517 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1518 struct dwarf2_cu
*);
1520 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1521 struct attribute
*, struct attr_abbrev
*,
1524 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1526 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1528 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1530 /* Read the next three bytes (little-endian order) as an unsigned integer. */
1531 static unsigned int read_3_bytes (bfd
*, const gdb_byte
*);
1533 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1535 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1537 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1540 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1542 static LONGEST read_checked_initial_length_and_offset
1543 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1544 unsigned int *, unsigned int *);
1546 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1547 const struct comp_unit_head
*,
1550 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1552 static sect_offset read_abbrev_offset
1553 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1554 struct dwarf2_section_info
*, sect_offset
);
1556 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1558 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1560 static const char *read_indirect_string
1561 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1562 const struct comp_unit_head
*, unsigned int *);
1564 static const char *read_indirect_line_string
1565 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1566 const struct comp_unit_head
*, unsigned int *);
1568 static const char *read_indirect_string_at_offset
1569 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1570 LONGEST str_offset
);
1572 static const char *read_indirect_string_from_dwz
1573 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1575 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1577 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1581 static const char *read_str_index (const struct die_reader_specs
*reader
,
1582 ULONGEST str_index
);
1584 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1586 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1587 struct dwarf2_cu
*);
1589 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1592 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1593 struct dwarf2_cu
*cu
);
1595 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1597 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1598 struct dwarf2_cu
*cu
);
1600 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1602 static struct die_info
*die_specification (struct die_info
*die
,
1603 struct dwarf2_cu
**);
1605 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1606 struct dwarf2_cu
*cu
);
1608 static void dwarf_decode_lines (struct line_header
*, const char *,
1609 struct dwarf2_cu
*, struct partial_symtab
*,
1610 CORE_ADDR
, int decode_mapping
);
1612 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1615 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1616 struct dwarf2_cu
*, struct symbol
* = NULL
);
1618 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1619 struct dwarf2_cu
*);
1621 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1624 struct obstack
*obstack
,
1625 struct dwarf2_cu
*cu
, LONGEST
*value
,
1626 const gdb_byte
**bytes
,
1627 struct dwarf2_locexpr_baton
**baton
);
1629 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1631 static int need_gnat_info (struct dwarf2_cu
*);
1633 static struct type
*die_descriptive_type (struct die_info
*,
1634 struct dwarf2_cu
*);
1636 static void set_descriptive_type (struct type
*, struct die_info
*,
1637 struct dwarf2_cu
*);
1639 static struct type
*die_containing_type (struct die_info
*,
1640 struct dwarf2_cu
*);
1642 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1643 struct dwarf2_cu
*);
1645 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1647 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1649 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1651 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1652 const char *suffix
, int physname
,
1653 struct dwarf2_cu
*cu
);
1655 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1657 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1659 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1661 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1663 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1665 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1667 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1668 struct dwarf2_cu
*, struct partial_symtab
*);
1670 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1671 values. Keep the items ordered with increasing constraints compliance. */
1674 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1675 PC_BOUNDS_NOT_PRESENT
,
1677 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1678 were present but they do not form a valid range of PC addresses. */
1681 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1684 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1688 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1689 CORE_ADDR
*, CORE_ADDR
*,
1691 struct partial_symtab
*);
1693 static void get_scope_pc_bounds (struct die_info
*,
1694 CORE_ADDR
*, CORE_ADDR
*,
1695 struct dwarf2_cu
*);
1697 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1698 CORE_ADDR
, struct dwarf2_cu
*);
1700 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1701 struct dwarf2_cu
*);
1703 static void dwarf2_attach_fields_to_type (struct field_info
*,
1704 struct type
*, struct dwarf2_cu
*);
1706 static void dwarf2_add_member_fn (struct field_info
*,
1707 struct die_info
*, struct type
*,
1708 struct dwarf2_cu
*);
1710 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1712 struct dwarf2_cu
*);
1714 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1716 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1718 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1720 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1722 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1724 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1726 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1728 static struct type
*read_module_type (struct die_info
*die
,
1729 struct dwarf2_cu
*cu
);
1731 static const char *namespace_name (struct die_info
*die
,
1732 int *is_anonymous
, struct dwarf2_cu
*);
1734 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1736 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1738 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1739 struct dwarf2_cu
*);
1741 static struct die_info
*read_die_and_siblings_1
1742 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1745 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1746 const gdb_byte
*info_ptr
,
1747 const gdb_byte
**new_info_ptr
,
1748 struct die_info
*parent
);
1750 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1751 struct die_info
**, const gdb_byte
*,
1754 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1755 struct die_info
**, const gdb_byte
*,
1758 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1760 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1763 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1765 static const char *dwarf2_full_name (const char *name
,
1766 struct die_info
*die
,
1767 struct dwarf2_cu
*cu
);
1769 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1770 struct dwarf2_cu
*cu
);
1772 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1773 struct dwarf2_cu
**);
1775 static const char *dwarf_tag_name (unsigned int);
1777 static const char *dwarf_attr_name (unsigned int);
1779 static const char *dwarf_unit_type_name (int unit_type
);
1781 static const char *dwarf_form_name (unsigned int);
1783 static const char *dwarf_bool_name (unsigned int);
1785 static const char *dwarf_type_encoding_name (unsigned int);
1787 static struct die_info
*sibling_die (struct die_info
*);
1789 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1791 static void dump_die_for_error (struct die_info
*);
1793 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1796 /*static*/ void dump_die (struct die_info
*, int max_level
);
1798 static void store_in_ref_table (struct die_info
*,
1799 struct dwarf2_cu
*);
1801 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1803 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1805 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1806 const struct attribute
*,
1807 struct dwarf2_cu
**);
1809 static struct die_info
*follow_die_ref (struct die_info
*,
1810 const struct attribute
*,
1811 struct dwarf2_cu
**);
1813 static struct die_info
*follow_die_sig (struct die_info
*,
1814 const struct attribute
*,
1815 struct dwarf2_cu
**);
1817 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1818 struct dwarf2_cu
*);
1820 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1821 const struct attribute
*,
1822 struct dwarf2_cu
*);
1824 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1826 static void read_signatured_type (struct signatured_type
*);
1828 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1829 struct die_info
*die
, struct dwarf2_cu
*cu
,
1830 struct dynamic_prop
*prop
, struct type
*type
);
1832 /* memory allocation interface */
1834 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1836 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1838 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1840 static int attr_form_is_block (const struct attribute
*);
1842 static int attr_form_is_section_offset (const struct attribute
*);
1844 static int attr_form_is_constant (const struct attribute
*);
1846 static int attr_form_is_ref (const struct attribute
*);
1848 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1849 struct dwarf2_loclist_baton
*baton
,
1850 const struct attribute
*attr
);
1852 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1854 struct dwarf2_cu
*cu
,
1857 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1858 const gdb_byte
*info_ptr
,
1859 struct abbrev_info
*abbrev
);
1861 static hashval_t
partial_die_hash (const void *item
);
1863 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1865 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1866 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1867 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1869 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1870 struct die_info
*comp_unit_die
,
1871 enum language pretend_language
);
1873 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1875 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1877 static struct type
*set_die_type (struct die_info
*, struct type
*,
1878 struct dwarf2_cu
*);
1880 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1882 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1884 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1887 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1890 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1893 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1894 struct dwarf2_per_cu_data
*);
1896 static void dwarf2_mark (struct dwarf2_cu
*);
1898 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1900 static struct type
*get_die_type_at_offset (sect_offset
,
1901 struct dwarf2_per_cu_data
*);
1903 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1905 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1906 enum language pretend_language
);
1908 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1910 static struct type
*dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
);
1911 static struct type
*dwarf2_per_cu_addr_sized_int_type
1912 (struct dwarf2_per_cu_data
*per_cu
, bool unsigned_p
);
1914 /* Class, the destructor of which frees all allocated queue entries. This
1915 will only have work to do if an error was thrown while processing the
1916 dwarf. If no error was thrown then the queue entries should have all
1917 been processed, and freed, as we went along. */
1919 class dwarf2_queue_guard
1922 dwarf2_queue_guard () = default;
1924 /* Free any entries remaining on the queue. There should only be
1925 entries left if we hit an error while processing the dwarf. */
1926 ~dwarf2_queue_guard ()
1928 struct dwarf2_queue_item
*item
, *last
;
1930 item
= dwarf2_queue
;
1933 /* Anything still marked queued is likely to be in an
1934 inconsistent state, so discard it. */
1935 if (item
->per_cu
->queued
)
1937 if (item
->per_cu
->cu
!= NULL
)
1938 free_one_cached_comp_unit (item
->per_cu
);
1939 item
->per_cu
->queued
= 0;
1947 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1951 /* The return type of find_file_and_directory. Note, the enclosed
1952 string pointers are only valid while this object is valid. */
1954 struct file_and_directory
1956 /* The filename. This is never NULL. */
1959 /* The compilation directory. NULL if not known. If we needed to
1960 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1961 points directly to the DW_AT_comp_dir string attribute owned by
1962 the obstack that owns the DIE. */
1963 const char *comp_dir
;
1965 /* If we needed to build a new string for comp_dir, this is what
1966 owns the storage. */
1967 std::string comp_dir_storage
;
1970 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1971 struct dwarf2_cu
*cu
);
1973 static char *file_full_name (int file
, struct line_header
*lh
,
1974 const char *comp_dir
);
1976 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1977 enum class rcuh_kind
{ COMPILE
, TYPE
};
1979 static const gdb_byte
*read_and_check_comp_unit_head
1980 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1981 struct comp_unit_head
*header
,
1982 struct dwarf2_section_info
*section
,
1983 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1984 rcuh_kind section_kind
);
1986 static void init_cutu_and_read_dies
1987 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1988 int use_existing_cu
, int keep
, bool skip_partial
,
1989 die_reader_func_ftype
*die_reader_func
, void *data
);
1991 static void init_cutu_and_read_dies_simple
1992 (struct dwarf2_per_cu_data
*this_cu
,
1993 die_reader_func_ftype
*die_reader_func
, void *data
);
1995 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1997 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1999 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2000 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2001 struct dwp_file
*dwp_file
, const char *comp_dir
,
2002 ULONGEST signature
, int is_debug_types
);
2004 static struct dwp_file
*get_dwp_file
2005 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2007 static struct dwo_unit
*lookup_dwo_comp_unit
2008 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2010 static struct dwo_unit
*lookup_dwo_type_unit
2011 (struct signatured_type
*, const char *, const char *);
2013 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2015 /* A unique pointer to a dwo_file. */
2017 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
2019 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2021 static void check_producer (struct dwarf2_cu
*cu
);
2023 static void free_line_header_voidp (void *arg
);
2025 /* Various complaints about symbol reading that don't abort the process. */
2028 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2030 complaint (_("statement list doesn't fit in .debug_line section"));
2034 dwarf2_debug_line_missing_file_complaint (void)
2036 complaint (_(".debug_line section has line data without a file"));
2040 dwarf2_debug_line_missing_end_sequence_complaint (void)
2042 complaint (_(".debug_line section has line "
2043 "program sequence without an end"));
2047 dwarf2_complex_location_expr_complaint (void)
2049 complaint (_("location expression too complex"));
2053 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2056 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2061 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2063 complaint (_("debug info runs off end of %s section"
2065 get_section_name (section
),
2066 get_section_file_name (section
));
2070 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2072 complaint (_("macro debug info contains a "
2073 "malformed macro definition:\n`%s'"),
2078 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2080 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2084 /* Hash function for line_header_hash. */
2087 line_header_hash (const struct line_header
*ofs
)
2089 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2092 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2095 line_header_hash_voidp (const void *item
)
2097 const struct line_header
*ofs
= (const struct line_header
*) item
;
2099 return line_header_hash (ofs
);
2102 /* Equality function for line_header_hash. */
2105 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2107 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2108 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2110 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2111 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2116 /* Read the given attribute value as an address, taking the attribute's
2117 form into account. */
2120 attr_value_as_address (struct attribute
*attr
)
2124 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_addrx
2125 && attr
->form
!= DW_FORM_GNU_addr_index
)
2127 /* Aside from a few clearly defined exceptions, attributes that
2128 contain an address must always be in DW_FORM_addr form.
2129 Unfortunately, some compilers happen to be violating this
2130 requirement by encoding addresses using other forms, such
2131 as DW_FORM_data4 for example. For those broken compilers,
2132 we try to do our best, without any guarantee of success,
2133 to interpret the address correctly. It would also be nice
2134 to generate a complaint, but that would require us to maintain
2135 a list of legitimate cases where a non-address form is allowed,
2136 as well as update callers to pass in at least the CU's DWARF
2137 version. This is more overhead than what we're willing to
2138 expand for a pretty rare case. */
2139 addr
= DW_UNSND (attr
);
2142 addr
= DW_ADDR (attr
);
2147 /* See declaration. */
2149 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2150 const dwarf2_debug_sections
*names
,
2152 : objfile (objfile_
),
2153 can_copy (can_copy_
)
2156 names
= &dwarf2_elf_names
;
2158 bfd
*obfd
= objfile
->obfd
;
2160 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2161 locate_sections (obfd
, sec
, *names
);
2164 dwarf2_per_objfile::~dwarf2_per_objfile ()
2166 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2167 free_cached_comp_units ();
2169 if (quick_file_names_table
)
2170 htab_delete (quick_file_names_table
);
2172 if (line_header_hash
)
2173 htab_delete (line_header_hash
);
2175 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2176 per_cu
->imported_symtabs_free ();
2178 for (signatured_type
*sig_type
: all_type_units
)
2179 sig_type
->per_cu
.imported_symtabs_free ();
2181 /* Everything else should be on the objfile obstack. */
2184 /* See declaration. */
2187 dwarf2_per_objfile::free_cached_comp_units ()
2189 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2190 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2191 while (per_cu
!= NULL
)
2193 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2196 *last_chain
= next_cu
;
2201 /* A helper class that calls free_cached_comp_units on
2204 class free_cached_comp_units
2208 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2209 : m_per_objfile (per_objfile
)
2213 ~free_cached_comp_units ()
2215 m_per_objfile
->free_cached_comp_units ();
2218 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2222 dwarf2_per_objfile
*m_per_objfile
;
2225 /* Try to locate the sections we need for DWARF 2 debugging
2226 information and return true if we have enough to do something.
2227 NAMES points to the dwarf2 section names, or is NULL if the standard
2228 ELF names are used. CAN_COPY is true for formats where symbol
2229 interposition is possible and so symbol values must follow copy
2230 relocation rules. */
2233 dwarf2_has_info (struct objfile
*objfile
,
2234 const struct dwarf2_debug_sections
*names
,
2237 if (objfile
->flags
& OBJF_READNEVER
)
2240 struct dwarf2_per_objfile
*dwarf2_per_objfile
2241 = get_dwarf2_per_objfile (objfile
);
2243 if (dwarf2_per_objfile
== NULL
)
2244 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2248 return (!dwarf2_per_objfile
->info
.is_virtual
2249 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2250 && !dwarf2_per_objfile
->abbrev
.is_virtual
2251 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2254 /* Return the containing section of virtual section SECTION. */
2256 static struct dwarf2_section_info
*
2257 get_containing_section (const struct dwarf2_section_info
*section
)
2259 gdb_assert (section
->is_virtual
);
2260 return section
->s
.containing_section
;
2263 /* Return the bfd owner of SECTION. */
2266 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2268 if (section
->is_virtual
)
2270 section
= get_containing_section (section
);
2271 gdb_assert (!section
->is_virtual
);
2273 return section
->s
.section
->owner
;
2276 /* Return the bfd section of SECTION.
2277 Returns NULL if the section is not present. */
2280 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2282 if (section
->is_virtual
)
2284 section
= get_containing_section (section
);
2285 gdb_assert (!section
->is_virtual
);
2287 return section
->s
.section
;
2290 /* Return the name of SECTION. */
2293 get_section_name (const struct dwarf2_section_info
*section
)
2295 asection
*sectp
= get_section_bfd_section (section
);
2297 gdb_assert (sectp
!= NULL
);
2298 return bfd_section_name (sectp
);
2301 /* Return the name of the file SECTION is in. */
2304 get_section_file_name (const struct dwarf2_section_info
*section
)
2306 bfd
*abfd
= get_section_bfd_owner (section
);
2308 return bfd_get_filename (abfd
);
2311 /* Return the id of SECTION.
2312 Returns 0 if SECTION doesn't exist. */
2315 get_section_id (const struct dwarf2_section_info
*section
)
2317 asection
*sectp
= get_section_bfd_section (section
);
2324 /* Return the flags of SECTION.
2325 SECTION (or containing section if this is a virtual section) must exist. */
2328 get_section_flags (const struct dwarf2_section_info
*section
)
2330 asection
*sectp
= get_section_bfd_section (section
);
2332 gdb_assert (sectp
!= NULL
);
2333 return bfd_section_flags (sectp
);
2336 /* When loading sections, we look either for uncompressed section or for
2337 compressed section names. */
2340 section_is_p (const char *section_name
,
2341 const struct dwarf2_section_names
*names
)
2343 if (names
->normal
!= NULL
2344 && strcmp (section_name
, names
->normal
) == 0)
2346 if (names
->compressed
!= NULL
2347 && strcmp (section_name
, names
->compressed
) == 0)
2352 /* See declaration. */
2355 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2356 const dwarf2_debug_sections
&names
)
2358 flagword aflag
= bfd_section_flags (sectp
);
2360 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2363 else if (elf_section_data (sectp
)->this_hdr
.sh_size
2364 > bfd_get_file_size (abfd
))
2366 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
2367 warning (_("Discarding section %s which has a section size (%s"
2368 ") larger than the file size [in module %s]"),
2369 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
2370 bfd_get_filename (abfd
));
2372 else if (section_is_p (sectp
->name
, &names
.info
))
2374 this->info
.s
.section
= sectp
;
2375 this->info
.size
= bfd_section_size (sectp
);
2377 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2379 this->abbrev
.s
.section
= sectp
;
2380 this->abbrev
.size
= bfd_section_size (sectp
);
2382 else if (section_is_p (sectp
->name
, &names
.line
))
2384 this->line
.s
.section
= sectp
;
2385 this->line
.size
= bfd_section_size (sectp
);
2387 else if (section_is_p (sectp
->name
, &names
.loc
))
2389 this->loc
.s
.section
= sectp
;
2390 this->loc
.size
= bfd_section_size (sectp
);
2392 else if (section_is_p (sectp
->name
, &names
.loclists
))
2394 this->loclists
.s
.section
= sectp
;
2395 this->loclists
.size
= bfd_section_size (sectp
);
2397 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2399 this->macinfo
.s
.section
= sectp
;
2400 this->macinfo
.size
= bfd_section_size (sectp
);
2402 else if (section_is_p (sectp
->name
, &names
.macro
))
2404 this->macro
.s
.section
= sectp
;
2405 this->macro
.size
= bfd_section_size (sectp
);
2407 else if (section_is_p (sectp
->name
, &names
.str
))
2409 this->str
.s
.section
= sectp
;
2410 this->str
.size
= bfd_section_size (sectp
);
2412 else if (section_is_p (sectp
->name
, &names
.line_str
))
2414 this->line_str
.s
.section
= sectp
;
2415 this->line_str
.size
= bfd_section_size (sectp
);
2417 else if (section_is_p (sectp
->name
, &names
.addr
))
2419 this->addr
.s
.section
= sectp
;
2420 this->addr
.size
= bfd_section_size (sectp
);
2422 else if (section_is_p (sectp
->name
, &names
.frame
))
2424 this->frame
.s
.section
= sectp
;
2425 this->frame
.size
= bfd_section_size (sectp
);
2427 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2429 this->eh_frame
.s
.section
= sectp
;
2430 this->eh_frame
.size
= bfd_section_size (sectp
);
2432 else if (section_is_p (sectp
->name
, &names
.ranges
))
2434 this->ranges
.s
.section
= sectp
;
2435 this->ranges
.size
= bfd_section_size (sectp
);
2437 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2439 this->rnglists
.s
.section
= sectp
;
2440 this->rnglists
.size
= bfd_section_size (sectp
);
2442 else if (section_is_p (sectp
->name
, &names
.types
))
2444 struct dwarf2_section_info type_section
;
2446 memset (&type_section
, 0, sizeof (type_section
));
2447 type_section
.s
.section
= sectp
;
2448 type_section
.size
= bfd_section_size (sectp
);
2450 this->types
.push_back (type_section
);
2452 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2454 this->gdb_index
.s
.section
= sectp
;
2455 this->gdb_index
.size
= bfd_section_size (sectp
);
2457 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2459 this->debug_names
.s
.section
= sectp
;
2460 this->debug_names
.size
= bfd_section_size (sectp
);
2462 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2464 this->debug_aranges
.s
.section
= sectp
;
2465 this->debug_aranges
.size
= bfd_section_size (sectp
);
2468 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2469 && bfd_section_vma (sectp
) == 0)
2470 this->has_section_at_zero
= true;
2473 /* A helper function that decides whether a section is empty,
2477 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2479 if (section
->is_virtual
)
2480 return section
->size
== 0;
2481 return section
->s
.section
== NULL
|| section
->size
== 0;
2484 /* See dwarf2read.h. */
2487 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2491 gdb_byte
*buf
, *retbuf
;
2495 info
->buffer
= NULL
;
2496 info
->readin
= true;
2498 if (dwarf2_section_empty_p (info
))
2501 sectp
= get_section_bfd_section (info
);
2503 /* If this is a virtual section we need to read in the real one first. */
2504 if (info
->is_virtual
)
2506 struct dwarf2_section_info
*containing_section
=
2507 get_containing_section (info
);
2509 gdb_assert (sectp
!= NULL
);
2510 if ((sectp
->flags
& SEC_RELOC
) != 0)
2512 error (_("Dwarf Error: DWP format V2 with relocations is not"
2513 " supported in section %s [in module %s]"),
2514 get_section_name (info
), get_section_file_name (info
));
2516 dwarf2_read_section (objfile
, containing_section
);
2517 /* Other code should have already caught virtual sections that don't
2519 gdb_assert (info
->virtual_offset
+ info
->size
2520 <= containing_section
->size
);
2521 /* If the real section is empty or there was a problem reading the
2522 section we shouldn't get here. */
2523 gdb_assert (containing_section
->buffer
!= NULL
);
2524 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2528 /* If the section has relocations, we must read it ourselves.
2529 Otherwise we attach it to the BFD. */
2530 if ((sectp
->flags
& SEC_RELOC
) == 0)
2532 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2536 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2539 /* When debugging .o files, we may need to apply relocations; see
2540 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2541 We never compress sections in .o files, so we only need to
2542 try this when the section is not compressed. */
2543 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2546 info
->buffer
= retbuf
;
2550 abfd
= get_section_bfd_owner (info
);
2551 gdb_assert (abfd
!= NULL
);
2553 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2554 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2556 error (_("Dwarf Error: Can't read DWARF data"
2557 " in section %s [in module %s]"),
2558 bfd_section_name (sectp
), bfd_get_filename (abfd
));
2562 /* A helper function that returns the size of a section in a safe way.
2563 If you are positive that the section has been read before using the
2564 size, then it is safe to refer to the dwarf2_section_info object's
2565 "size" field directly. In other cases, you must call this
2566 function, because for compressed sections the size field is not set
2567 correctly until the section has been read. */
2569 static bfd_size_type
2570 dwarf2_section_size (struct objfile
*objfile
,
2571 struct dwarf2_section_info
*info
)
2574 dwarf2_read_section (objfile
, info
);
2578 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2582 dwarf2_get_section_info (struct objfile
*objfile
,
2583 enum dwarf2_section_enum sect
,
2584 asection
**sectp
, const gdb_byte
**bufp
,
2585 bfd_size_type
*sizep
)
2587 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2588 struct dwarf2_section_info
*info
;
2590 /* We may see an objfile without any DWARF, in which case we just
2601 case DWARF2_DEBUG_FRAME
:
2602 info
= &data
->frame
;
2604 case DWARF2_EH_FRAME
:
2605 info
= &data
->eh_frame
;
2608 gdb_assert_not_reached ("unexpected section");
2611 dwarf2_read_section (objfile
, info
);
2613 *sectp
= get_section_bfd_section (info
);
2614 *bufp
= info
->buffer
;
2615 *sizep
= info
->size
;
2618 /* A helper function to find the sections for a .dwz file. */
2621 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2623 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2625 /* Note that we only support the standard ELF names, because .dwz
2626 is ELF-only (at the time of writing). */
2627 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2629 dwz_file
->abbrev
.s
.section
= sectp
;
2630 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2632 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2634 dwz_file
->info
.s
.section
= sectp
;
2635 dwz_file
->info
.size
= bfd_section_size (sectp
);
2637 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2639 dwz_file
->str
.s
.section
= sectp
;
2640 dwz_file
->str
.size
= bfd_section_size (sectp
);
2642 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2644 dwz_file
->line
.s
.section
= sectp
;
2645 dwz_file
->line
.size
= bfd_section_size (sectp
);
2647 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2649 dwz_file
->macro
.s
.section
= sectp
;
2650 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2652 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2654 dwz_file
->gdb_index
.s
.section
= sectp
;
2655 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2657 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2659 dwz_file
->debug_names
.s
.section
= sectp
;
2660 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2664 /* See dwarf2read.h. */
2667 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2669 const char *filename
;
2670 bfd_size_type buildid_len_arg
;
2674 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2675 return dwarf2_per_objfile
->dwz_file
.get ();
2677 bfd_set_error (bfd_error_no_error
);
2678 gdb::unique_xmalloc_ptr
<char> data
2679 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2680 &buildid_len_arg
, &buildid
));
2683 if (bfd_get_error () == bfd_error_no_error
)
2685 error (_("could not read '.gnu_debugaltlink' section: %s"),
2686 bfd_errmsg (bfd_get_error ()));
2689 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2691 buildid_len
= (size_t) buildid_len_arg
;
2693 filename
= data
.get ();
2695 std::string abs_storage
;
2696 if (!IS_ABSOLUTE_PATH (filename
))
2698 gdb::unique_xmalloc_ptr
<char> abs
2699 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2701 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2702 filename
= abs_storage
.c_str ();
2705 /* First try the file name given in the section. If that doesn't
2706 work, try to use the build-id instead. */
2707 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2708 if (dwz_bfd
!= NULL
)
2710 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2711 dwz_bfd
.reset (nullptr);
2714 if (dwz_bfd
== NULL
)
2715 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2717 if (dwz_bfd
== NULL
)
2718 error (_("could not find '.gnu_debugaltlink' file for %s"),
2719 objfile_name (dwarf2_per_objfile
->objfile
));
2721 std::unique_ptr
<struct dwz_file
> result
2722 (new struct dwz_file (std::move (dwz_bfd
)));
2724 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2727 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2728 result
->dwz_bfd
.get ());
2729 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2730 return dwarf2_per_objfile
->dwz_file
.get ();
2733 /* DWARF quick_symbols_functions support. */
2735 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2736 unique line tables, so we maintain a separate table of all .debug_line
2737 derived entries to support the sharing.
2738 All the quick functions need is the list of file names. We discard the
2739 line_header when we're done and don't need to record it here. */
2740 struct quick_file_names
2742 /* The data used to construct the hash key. */
2743 struct stmt_list_hash hash
;
2745 /* The number of entries in file_names, real_names. */
2746 unsigned int num_file_names
;
2748 /* The file names from the line table, after being run through
2750 const char **file_names
;
2752 /* The file names from the line table after being run through
2753 gdb_realpath. These are computed lazily. */
2754 const char **real_names
;
2757 /* When using the index (and thus not using psymtabs), each CU has an
2758 object of this type. This is used to hold information needed by
2759 the various "quick" methods. */
2760 struct dwarf2_per_cu_quick_data
2762 /* The file table. This can be NULL if there was no file table
2763 or it's currently not read in.
2764 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2765 struct quick_file_names
*file_names
;
2767 /* The corresponding symbol table. This is NULL if symbols for this
2768 CU have not yet been read. */
2769 struct compunit_symtab
*compunit_symtab
;
2771 /* A temporary mark bit used when iterating over all CUs in
2772 expand_symtabs_matching. */
2773 unsigned int mark
: 1;
2775 /* True if we've tried to read the file table and found there isn't one.
2776 There will be no point in trying to read it again next time. */
2777 unsigned int no_file_data
: 1;
2780 /* Utility hash function for a stmt_list_hash. */
2783 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2787 if (stmt_list_hash
->dwo_unit
!= NULL
)
2788 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2789 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2793 /* Utility equality function for a stmt_list_hash. */
2796 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2797 const struct stmt_list_hash
*rhs
)
2799 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2801 if (lhs
->dwo_unit
!= NULL
2802 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2805 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2808 /* Hash function for a quick_file_names. */
2811 hash_file_name_entry (const void *e
)
2813 const struct quick_file_names
*file_data
2814 = (const struct quick_file_names
*) e
;
2816 return hash_stmt_list_entry (&file_data
->hash
);
2819 /* Equality function for a quick_file_names. */
2822 eq_file_name_entry (const void *a
, const void *b
)
2824 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2825 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2827 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2830 /* Delete function for a quick_file_names. */
2833 delete_file_name_entry (void *e
)
2835 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2838 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2840 xfree ((void*) file_data
->file_names
[i
]);
2841 if (file_data
->real_names
)
2842 xfree ((void*) file_data
->real_names
[i
]);
2845 /* The space for the struct itself lives on objfile_obstack,
2846 so we don't free it here. */
2849 /* Create a quick_file_names hash table. */
2852 create_quick_file_names_table (unsigned int nr_initial_entries
)
2854 return htab_create_alloc (nr_initial_entries
,
2855 hash_file_name_entry
, eq_file_name_entry
,
2856 delete_file_name_entry
, xcalloc
, xfree
);
2859 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2860 have to be created afterwards. You should call age_cached_comp_units after
2861 processing PER_CU->CU. dw2_setup must have been already called. */
2864 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2866 if (per_cu
->is_debug_types
)
2867 load_full_type_unit (per_cu
);
2869 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2871 if (per_cu
->cu
== NULL
)
2872 return; /* Dummy CU. */
2874 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2877 /* Read in the symbols for PER_CU. */
2880 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2882 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2884 /* Skip type_unit_groups, reading the type units they contain
2885 is handled elsewhere. */
2886 if (IS_TYPE_UNIT_GROUP (per_cu
))
2889 /* The destructor of dwarf2_queue_guard frees any entries left on
2890 the queue. After this point we're guaranteed to leave this function
2891 with the dwarf queue empty. */
2892 dwarf2_queue_guard q_guard
;
2894 if (dwarf2_per_objfile
->using_index
2895 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2896 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2898 queue_comp_unit (per_cu
, language_minimal
);
2899 load_cu (per_cu
, skip_partial
);
2901 /* If we just loaded a CU from a DWO, and we're working with an index
2902 that may badly handle TUs, load all the TUs in that DWO as well.
2903 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2904 if (!per_cu
->is_debug_types
2905 && per_cu
->cu
!= NULL
2906 && per_cu
->cu
->dwo_unit
!= NULL
2907 && dwarf2_per_objfile
->index_table
!= NULL
2908 && dwarf2_per_objfile
->index_table
->version
<= 7
2909 /* DWP files aren't supported yet. */
2910 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2911 queue_and_load_all_dwo_tus (per_cu
);
2914 process_queue (dwarf2_per_objfile
);
2916 /* Age the cache, releasing compilation units that have not
2917 been used recently. */
2918 age_cached_comp_units (dwarf2_per_objfile
);
2921 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2922 the objfile from which this CU came. Returns the resulting symbol
2925 static struct compunit_symtab
*
2926 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2928 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2930 gdb_assert (dwarf2_per_objfile
->using_index
);
2931 if (!per_cu
->v
.quick
->compunit_symtab
)
2933 free_cached_comp_units
freer (dwarf2_per_objfile
);
2934 scoped_restore decrementer
= increment_reading_symtab ();
2935 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2936 process_cu_includes (dwarf2_per_objfile
);
2939 return per_cu
->v
.quick
->compunit_symtab
;
2942 /* See declaration. */
2944 dwarf2_per_cu_data
*
2945 dwarf2_per_objfile::get_cutu (int index
)
2947 if (index
>= this->all_comp_units
.size ())
2949 index
-= this->all_comp_units
.size ();
2950 gdb_assert (index
< this->all_type_units
.size ());
2951 return &this->all_type_units
[index
]->per_cu
;
2954 return this->all_comp_units
[index
];
2957 /* See declaration. */
2959 dwarf2_per_cu_data
*
2960 dwarf2_per_objfile::get_cu (int index
)
2962 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2964 return this->all_comp_units
[index
];
2967 /* See declaration. */
2970 dwarf2_per_objfile::get_tu (int index
)
2972 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2974 return this->all_type_units
[index
];
2977 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2978 objfile_obstack, and constructed with the specified field
2981 static dwarf2_per_cu_data
*
2982 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2983 struct dwarf2_section_info
*section
,
2985 sect_offset sect_off
, ULONGEST length
)
2987 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2988 dwarf2_per_cu_data
*the_cu
2989 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2990 struct dwarf2_per_cu_data
);
2991 the_cu
->sect_off
= sect_off
;
2992 the_cu
->length
= length
;
2993 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2994 the_cu
->section
= section
;
2995 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2996 struct dwarf2_per_cu_quick_data
);
2997 the_cu
->is_dwz
= is_dwz
;
3001 /* A helper for create_cus_from_index that handles a given list of
3005 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3006 const gdb_byte
*cu_list
, offset_type n_elements
,
3007 struct dwarf2_section_info
*section
,
3010 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
3012 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3014 sect_offset sect_off
3015 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3016 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3019 dwarf2_per_cu_data
*per_cu
3020 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
3022 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3026 /* Read the CU list from the mapped index, and use it to create all
3027 the CU objects for this objfile. */
3030 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3031 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3032 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3034 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3035 dwarf2_per_objfile
->all_comp_units
.reserve
3036 ((cu_list_elements
+ dwz_elements
) / 2);
3038 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3039 &dwarf2_per_objfile
->info
, 0);
3041 if (dwz_elements
== 0)
3044 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3045 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3049 /* Create the signatured type hash table from the index. */
3052 create_signatured_type_table_from_index
3053 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3054 struct dwarf2_section_info
*section
,
3055 const gdb_byte
*bytes
,
3056 offset_type elements
)
3058 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3060 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3061 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3063 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3065 for (offset_type i
= 0; i
< elements
; i
+= 3)
3067 struct signatured_type
*sig_type
;
3070 cu_offset type_offset_in_tu
;
3072 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3073 sect_offset sect_off
3074 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3076 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3078 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3081 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3082 struct signatured_type
);
3083 sig_type
->signature
= signature
;
3084 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3085 sig_type
->per_cu
.is_debug_types
= 1;
3086 sig_type
->per_cu
.section
= section
;
3087 sig_type
->per_cu
.sect_off
= sect_off
;
3088 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3089 sig_type
->per_cu
.v
.quick
3090 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3091 struct dwarf2_per_cu_quick_data
);
3093 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3096 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3099 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3102 /* Create the signatured type hash table from .debug_names. */
3105 create_signatured_type_table_from_debug_names
3106 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3107 const mapped_debug_names
&map
,
3108 struct dwarf2_section_info
*section
,
3109 struct dwarf2_section_info
*abbrev_section
)
3111 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3113 dwarf2_read_section (objfile
, section
);
3114 dwarf2_read_section (objfile
, abbrev_section
);
3116 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3117 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3119 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3121 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3123 struct signatured_type
*sig_type
;
3126 sect_offset sect_off
3127 = (sect_offset
) (extract_unsigned_integer
3128 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3130 map
.dwarf5_byte_order
));
3132 comp_unit_head cu_header
;
3133 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3135 section
->buffer
+ to_underlying (sect_off
),
3138 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3139 struct signatured_type
);
3140 sig_type
->signature
= cu_header
.signature
;
3141 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3142 sig_type
->per_cu
.is_debug_types
= 1;
3143 sig_type
->per_cu
.section
= section
;
3144 sig_type
->per_cu
.sect_off
= sect_off
;
3145 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3146 sig_type
->per_cu
.v
.quick
3147 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3148 struct dwarf2_per_cu_quick_data
);
3150 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3153 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3156 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3159 /* Read the address map data from the mapped index, and use it to
3160 populate the objfile's psymtabs_addrmap. */
3163 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3164 struct mapped_index
*index
)
3166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3167 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3168 const gdb_byte
*iter
, *end
;
3169 struct addrmap
*mutable_map
;
3172 auto_obstack temp_obstack
;
3174 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3176 iter
= index
->address_table
.data ();
3177 end
= iter
+ index
->address_table
.size ();
3179 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3183 ULONGEST hi
, lo
, cu_index
;
3184 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3186 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3188 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3193 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3194 hex_string (lo
), hex_string (hi
));
3198 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3200 complaint (_(".gdb_index address table has invalid CU number %u"),
3201 (unsigned) cu_index
);
3205 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
3206 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
3207 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3208 dwarf2_per_objfile
->get_cu (cu_index
));
3211 objfile
->partial_symtabs
->psymtabs_addrmap
3212 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3215 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3216 populate the objfile's psymtabs_addrmap. */
3219 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3220 struct dwarf2_section_info
*section
)
3222 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3223 bfd
*abfd
= objfile
->obfd
;
3224 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3225 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3226 SECT_OFF_TEXT (objfile
));
3228 auto_obstack temp_obstack
;
3229 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3231 std::unordered_map
<sect_offset
,
3232 dwarf2_per_cu_data
*,
3233 gdb::hash_enum
<sect_offset
>>
3234 debug_info_offset_to_per_cu
;
3235 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3237 const auto insertpair
3238 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3239 if (!insertpair
.second
)
3241 warning (_("Section .debug_aranges in %s has duplicate "
3242 "debug_info_offset %s, ignoring .debug_aranges."),
3243 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3248 dwarf2_read_section (objfile
, section
);
3250 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3252 const gdb_byte
*addr
= section
->buffer
;
3254 while (addr
< section
->buffer
+ section
->size
)
3256 const gdb_byte
*const entry_addr
= addr
;
3257 unsigned int bytes_read
;
3259 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3263 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3264 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3265 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3266 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3268 warning (_("Section .debug_aranges in %s entry at offset %s "
3269 "length %s exceeds section length %s, "
3270 "ignoring .debug_aranges."),
3271 objfile_name (objfile
),
3272 plongest (entry_addr
- section
->buffer
),
3273 plongest (bytes_read
+ entry_length
),
3274 pulongest (section
->size
));
3278 /* The version number. */
3279 const uint16_t version
= read_2_bytes (abfd
, addr
);
3283 warning (_("Section .debug_aranges in %s entry at offset %s "
3284 "has unsupported version %d, ignoring .debug_aranges."),
3285 objfile_name (objfile
),
3286 plongest (entry_addr
- section
->buffer
), version
);
3290 const uint64_t debug_info_offset
3291 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3292 addr
+= offset_size
;
3293 const auto per_cu_it
3294 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3295 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3297 warning (_("Section .debug_aranges in %s entry at offset %s "
3298 "debug_info_offset %s does not exists, "
3299 "ignoring .debug_aranges."),
3300 objfile_name (objfile
),
3301 plongest (entry_addr
- section
->buffer
),
3302 pulongest (debug_info_offset
));
3305 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3307 const uint8_t address_size
= *addr
++;
3308 if (address_size
< 1 || address_size
> 8)
3310 warning (_("Section .debug_aranges in %s entry at offset %s "
3311 "address_size %u is invalid, ignoring .debug_aranges."),
3312 objfile_name (objfile
),
3313 plongest (entry_addr
- section
->buffer
), address_size
);
3317 const uint8_t segment_selector_size
= *addr
++;
3318 if (segment_selector_size
!= 0)
3320 warning (_("Section .debug_aranges in %s entry at offset %s "
3321 "segment_selector_size %u is not supported, "
3322 "ignoring .debug_aranges."),
3323 objfile_name (objfile
),
3324 plongest (entry_addr
- section
->buffer
),
3325 segment_selector_size
);
3329 /* Must pad to an alignment boundary that is twice the address
3330 size. It is undocumented by the DWARF standard but GCC does
3332 for (size_t padding
= ((-(addr
- section
->buffer
))
3333 & (2 * address_size
- 1));
3334 padding
> 0; padding
--)
3337 warning (_("Section .debug_aranges in %s entry at offset %s "
3338 "padding is not zero, ignoring .debug_aranges."),
3339 objfile_name (objfile
),
3340 plongest (entry_addr
- section
->buffer
));
3346 if (addr
+ 2 * address_size
> entry_end
)
3348 warning (_("Section .debug_aranges in %s entry at offset %s "
3349 "address list is not properly terminated, "
3350 "ignoring .debug_aranges."),
3351 objfile_name (objfile
),
3352 plongest (entry_addr
- section
->buffer
));
3355 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3357 addr
+= address_size
;
3358 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3360 addr
+= address_size
;
3361 if (start
== 0 && length
== 0)
3363 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3365 /* Symbol was eliminated due to a COMDAT group. */
3368 ULONGEST end
= start
+ length
;
3369 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3371 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3373 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3377 objfile
->partial_symtabs
->psymtabs_addrmap
3378 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3381 /* Find a slot in the mapped index INDEX for the object named NAME.
3382 If NAME is found, set *VEC_OUT to point to the CU vector in the
3383 constant pool and return true. If NAME cannot be found, return
3387 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3388 offset_type
**vec_out
)
3391 offset_type slot
, step
;
3392 int (*cmp
) (const char *, const char *);
3394 gdb::unique_xmalloc_ptr
<char> without_params
;
3395 if (current_language
->la_language
== language_cplus
3396 || current_language
->la_language
== language_fortran
3397 || current_language
->la_language
== language_d
)
3399 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3402 if (strchr (name
, '(') != NULL
)
3404 without_params
= cp_remove_params (name
);
3406 if (without_params
!= NULL
)
3407 name
= without_params
.get ();
3411 /* Index version 4 did not support case insensitive searches. But the
3412 indices for case insensitive languages are built in lowercase, therefore
3413 simulate our NAME being searched is also lowercased. */
3414 hash
= mapped_index_string_hash ((index
->version
== 4
3415 && case_sensitivity
== case_sensitive_off
3416 ? 5 : index
->version
),
3419 slot
= hash
& (index
->symbol_table
.size () - 1);
3420 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3421 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3427 const auto &bucket
= index
->symbol_table
[slot
];
3428 if (bucket
.name
== 0 && bucket
.vec
== 0)
3431 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3432 if (!cmp (name
, str
))
3434 *vec_out
= (offset_type
*) (index
->constant_pool
3435 + MAYBE_SWAP (bucket
.vec
));
3439 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3443 /* A helper function that reads the .gdb_index from BUFFER and fills
3444 in MAP. FILENAME is the name of the file containing the data;
3445 it is used for error reporting. DEPRECATED_OK is true if it is
3446 ok to use deprecated sections.
3448 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3449 out parameters that are filled in with information about the CU and
3450 TU lists in the section.
3452 Returns true if all went well, false otherwise. */
3455 read_gdb_index_from_buffer (struct objfile
*objfile
,
3456 const char *filename
,
3458 gdb::array_view
<const gdb_byte
> buffer
,
3459 struct mapped_index
*map
,
3460 const gdb_byte
**cu_list
,
3461 offset_type
*cu_list_elements
,
3462 const gdb_byte
**types_list
,
3463 offset_type
*types_list_elements
)
3465 const gdb_byte
*addr
= &buffer
[0];
3467 /* Version check. */
3468 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3469 /* Versions earlier than 3 emitted every copy of a psymbol. This
3470 causes the index to behave very poorly for certain requests. Version 3
3471 contained incomplete addrmap. So, it seems better to just ignore such
3475 static int warning_printed
= 0;
3476 if (!warning_printed
)
3478 warning (_("Skipping obsolete .gdb_index section in %s."),
3480 warning_printed
= 1;
3484 /* Index version 4 uses a different hash function than index version
3487 Versions earlier than 6 did not emit psymbols for inlined
3488 functions. Using these files will cause GDB not to be able to
3489 set breakpoints on inlined functions by name, so we ignore these
3490 indices unless the user has done
3491 "set use-deprecated-index-sections on". */
3492 if (version
< 6 && !deprecated_ok
)
3494 static int warning_printed
= 0;
3495 if (!warning_printed
)
3498 Skipping deprecated .gdb_index section in %s.\n\
3499 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3500 to use the section anyway."),
3502 warning_printed
= 1;
3506 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3507 of the TU (for symbols coming from TUs),
3508 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3509 Plus gold-generated indices can have duplicate entries for global symbols,
3510 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3511 These are just performance bugs, and we can't distinguish gdb-generated
3512 indices from gold-generated ones, so issue no warning here. */
3514 /* Indexes with higher version than the one supported by GDB may be no
3515 longer backward compatible. */
3519 map
->version
= version
;
3521 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3524 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3525 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3529 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3530 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3531 - MAYBE_SWAP (metadata
[i
]))
3535 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3536 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3538 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3541 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3542 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3544 = gdb::array_view
<mapped_index::symbol_table_slot
>
3545 ((mapped_index::symbol_table_slot
*) symbol_table
,
3546 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3549 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3554 /* Callback types for dwarf2_read_gdb_index. */
3556 typedef gdb::function_view
3557 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3558 get_gdb_index_contents_ftype
;
3559 typedef gdb::function_view
3560 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3561 get_gdb_index_contents_dwz_ftype
;
3563 /* Read .gdb_index. If everything went ok, initialize the "quick"
3564 elements of all the CUs and return 1. Otherwise, return 0. */
3567 dwarf2_read_gdb_index
3568 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3569 get_gdb_index_contents_ftype get_gdb_index_contents
,
3570 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3572 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3573 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3574 struct dwz_file
*dwz
;
3575 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3577 gdb::array_view
<const gdb_byte
> main_index_contents
3578 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3580 if (main_index_contents
.empty ())
3583 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3584 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3585 use_deprecated_index_sections
,
3586 main_index_contents
, map
.get (), &cu_list
,
3587 &cu_list_elements
, &types_list
,
3588 &types_list_elements
))
3591 /* Don't use the index if it's empty. */
3592 if (map
->symbol_table
.empty ())
3595 /* If there is a .dwz file, read it so we can get its CU list as
3597 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3600 struct mapped_index dwz_map
;
3601 const gdb_byte
*dwz_types_ignore
;
3602 offset_type dwz_types_elements_ignore
;
3604 gdb::array_view
<const gdb_byte
> dwz_index_content
3605 = get_gdb_index_contents_dwz (objfile
, dwz
);
3607 if (dwz_index_content
.empty ())
3610 if (!read_gdb_index_from_buffer (objfile
,
3611 bfd_get_filename (dwz
->dwz_bfd
.get ()),
3612 1, dwz_index_content
, &dwz_map
,
3613 &dwz_list
, &dwz_list_elements
,
3615 &dwz_types_elements_ignore
))
3617 warning (_("could not read '.gdb_index' section from %s; skipping"),
3618 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3623 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3624 dwz_list
, dwz_list_elements
);
3626 if (types_list_elements
)
3628 /* We can only handle a single .debug_types when we have an
3630 if (dwarf2_per_objfile
->types
.size () != 1)
3633 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3635 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3636 types_list
, types_list_elements
);
3639 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3641 dwarf2_per_objfile
->index_table
= std::move (map
);
3642 dwarf2_per_objfile
->using_index
= 1;
3643 dwarf2_per_objfile
->quick_file_names_table
=
3644 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3649 /* die_reader_func for dw2_get_file_names. */
3652 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3653 const gdb_byte
*info_ptr
,
3654 struct die_info
*comp_unit_die
,
3658 struct dwarf2_cu
*cu
= reader
->cu
;
3659 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3660 struct dwarf2_per_objfile
*dwarf2_per_objfile
3661 = cu
->per_cu
->dwarf2_per_objfile
;
3662 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3663 struct dwarf2_per_cu_data
*lh_cu
;
3664 struct attribute
*attr
;
3666 struct quick_file_names
*qfn
;
3668 gdb_assert (! this_cu
->is_debug_types
);
3670 /* Our callers never want to match partial units -- instead they
3671 will match the enclosing full CU. */
3672 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3674 this_cu
->v
.quick
->no_file_data
= 1;
3682 sect_offset line_offset
{};
3684 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3685 if (attr
!= nullptr)
3687 struct quick_file_names find_entry
;
3689 line_offset
= (sect_offset
) DW_UNSND (attr
);
3691 /* We may have already read in this line header (TU line header sharing).
3692 If we have we're done. */
3693 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3694 find_entry
.hash
.line_sect_off
= line_offset
;
3695 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3696 &find_entry
, INSERT
);
3699 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3703 lh
= dwarf_decode_line_header (line_offset
, cu
);
3707 lh_cu
->v
.quick
->no_file_data
= 1;
3711 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3712 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3713 qfn
->hash
.line_sect_off
= line_offset
;
3714 gdb_assert (slot
!= NULL
);
3717 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3720 if (strcmp (fnd
.name
, "<unknown>") != 0)
3723 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3725 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3727 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3728 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3729 qfn
->file_names
[i
+ offset
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3730 qfn
->real_names
= NULL
;
3732 lh_cu
->v
.quick
->file_names
= qfn
;
3735 /* A helper for the "quick" functions which attempts to read the line
3736 table for THIS_CU. */
3738 static struct quick_file_names
*
3739 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3741 /* This should never be called for TUs. */
3742 gdb_assert (! this_cu
->is_debug_types
);
3743 /* Nor type unit groups. */
3744 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3746 if (this_cu
->v
.quick
->file_names
!= NULL
)
3747 return this_cu
->v
.quick
->file_names
;
3748 /* If we know there is no line data, no point in looking again. */
3749 if (this_cu
->v
.quick
->no_file_data
)
3752 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3754 if (this_cu
->v
.quick
->no_file_data
)
3756 return this_cu
->v
.quick
->file_names
;
3759 /* A helper for the "quick" functions which computes and caches the
3760 real path for a given file name from the line table. */
3763 dw2_get_real_path (struct objfile
*objfile
,
3764 struct quick_file_names
*qfn
, int index
)
3766 if (qfn
->real_names
== NULL
)
3767 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3768 qfn
->num_file_names
, const char *);
3770 if (qfn
->real_names
[index
] == NULL
)
3771 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3773 return qfn
->real_names
[index
];
3776 static struct symtab
*
3777 dw2_find_last_source_symtab (struct objfile
*objfile
)
3779 struct dwarf2_per_objfile
*dwarf2_per_objfile
3780 = get_dwarf2_per_objfile (objfile
);
3781 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3782 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3787 return compunit_primary_filetab (cust
);
3790 /* Traversal function for dw2_forget_cached_source_info. */
3793 dw2_free_cached_file_names (void **slot
, void *info
)
3795 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3797 if (file_data
->real_names
)
3801 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3803 xfree ((void*) file_data
->real_names
[i
]);
3804 file_data
->real_names
[i
] = NULL
;
3812 dw2_forget_cached_source_info (struct objfile
*objfile
)
3814 struct dwarf2_per_objfile
*dwarf2_per_objfile
3815 = get_dwarf2_per_objfile (objfile
);
3817 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3818 dw2_free_cached_file_names
, NULL
);
3821 /* Helper function for dw2_map_symtabs_matching_filename that expands
3822 the symtabs and calls the iterator. */
3825 dw2_map_expand_apply (struct objfile
*objfile
,
3826 struct dwarf2_per_cu_data
*per_cu
,
3827 const char *name
, const char *real_path
,
3828 gdb::function_view
<bool (symtab
*)> callback
)
3830 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3832 /* Don't visit already-expanded CUs. */
3833 if (per_cu
->v
.quick
->compunit_symtab
)
3836 /* This may expand more than one symtab, and we want to iterate over
3838 dw2_instantiate_symtab (per_cu
, false);
3840 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3841 last_made
, callback
);
3844 /* Implementation of the map_symtabs_matching_filename method. */
3847 dw2_map_symtabs_matching_filename
3848 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3849 gdb::function_view
<bool (symtab
*)> callback
)
3851 const char *name_basename
= lbasename (name
);
3852 struct dwarf2_per_objfile
*dwarf2_per_objfile
3853 = get_dwarf2_per_objfile (objfile
);
3855 /* The rule is CUs specify all the files, including those used by
3856 any TU, so there's no need to scan TUs here. */
3858 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3860 /* We only need to look at symtabs not already expanded. */
3861 if (per_cu
->v
.quick
->compunit_symtab
)
3864 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3865 if (file_data
== NULL
)
3868 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3870 const char *this_name
= file_data
->file_names
[j
];
3871 const char *this_real_name
;
3873 if (compare_filenames_for_search (this_name
, name
))
3875 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3881 /* Before we invoke realpath, which can get expensive when many
3882 files are involved, do a quick comparison of the basenames. */
3883 if (! basenames_may_differ
3884 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3887 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3888 if (compare_filenames_for_search (this_real_name
, name
))
3890 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3896 if (real_path
!= NULL
)
3898 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3899 gdb_assert (IS_ABSOLUTE_PATH (name
));
3900 if (this_real_name
!= NULL
3901 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3903 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3915 /* Struct used to manage iterating over all CUs looking for a symbol. */
3917 struct dw2_symtab_iterator
3919 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3920 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3921 /* If set, only look for symbols that match that block. Valid values are
3922 GLOBAL_BLOCK and STATIC_BLOCK. */
3923 gdb::optional
<block_enum
> block_index
;
3924 /* The kind of symbol we're looking for. */
3926 /* The list of CUs from the index entry of the symbol,
3927 or NULL if not found. */
3929 /* The next element in VEC to look at. */
3931 /* The number of elements in VEC, or zero if there is no match. */
3933 /* Have we seen a global version of the symbol?
3934 If so we can ignore all further global instances.
3935 This is to work around gold/15646, inefficient gold-generated
3940 /* Initialize the index symtab iterator ITER. */
3943 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3944 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3945 gdb::optional
<block_enum
> block_index
,
3949 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3950 iter
->block_index
= block_index
;
3951 iter
->domain
= domain
;
3953 iter
->global_seen
= 0;
3955 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3957 /* index is NULL if OBJF_READNOW. */
3958 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3959 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3967 /* Return the next matching CU or NULL if there are no more. */
3969 static struct dwarf2_per_cu_data
*
3970 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3972 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3974 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3976 offset_type cu_index_and_attrs
=
3977 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3978 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3979 gdb_index_symbol_kind symbol_kind
=
3980 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3981 /* Only check the symbol attributes if they're present.
3982 Indices prior to version 7 don't record them,
3983 and indices >= 7 may elide them for certain symbols
3984 (gold does this). */
3986 (dwarf2_per_objfile
->index_table
->version
>= 7
3987 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3989 /* Don't crash on bad data. */
3990 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3991 + dwarf2_per_objfile
->all_type_units
.size ()))
3993 complaint (_(".gdb_index entry has bad CU index"
3995 objfile_name (dwarf2_per_objfile
->objfile
));
3999 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4001 /* Skip if already read in. */
4002 if (per_cu
->v
.quick
->compunit_symtab
)
4005 /* Check static vs global. */
4008 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4010 if (iter
->block_index
.has_value ())
4012 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
4014 if (is_static
!= want_static
)
4018 /* Work around gold/15646. */
4019 if (!is_static
&& iter
->global_seen
)
4022 iter
->global_seen
= 1;
4025 /* Only check the symbol's kind if it has one. */
4028 switch (iter
->domain
)
4031 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4032 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4033 /* Some types are also in VAR_DOMAIN. */
4034 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4038 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4042 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4046 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4061 static struct compunit_symtab
*
4062 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
4063 const char *name
, domain_enum domain
)
4065 struct compunit_symtab
*stab_best
= NULL
;
4066 struct dwarf2_per_objfile
*dwarf2_per_objfile
4067 = get_dwarf2_per_objfile (objfile
);
4069 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4071 struct dw2_symtab_iterator iter
;
4072 struct dwarf2_per_cu_data
*per_cu
;
4074 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
4076 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4078 struct symbol
*sym
, *with_opaque
= NULL
;
4079 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4080 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4081 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4083 sym
= block_find_symbol (block
, name
, domain
,
4084 block_find_non_opaque_type_preferred
,
4087 /* Some caution must be observed with overloaded functions
4088 and methods, since the index will not contain any overload
4089 information (but NAME might contain it). */
4092 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4094 if (with_opaque
!= NULL
4095 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4098 /* Keep looking through other CUs. */
4105 dw2_print_stats (struct objfile
*objfile
)
4107 struct dwarf2_per_objfile
*dwarf2_per_objfile
4108 = get_dwarf2_per_objfile (objfile
);
4109 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4110 + dwarf2_per_objfile
->all_type_units
.size ());
4113 for (int i
= 0; i
< total
; ++i
)
4115 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4117 if (!per_cu
->v
.quick
->compunit_symtab
)
4120 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4121 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4124 /* This dumps minimal information about the index.
4125 It is called via "mt print objfiles".
4126 One use is to verify .gdb_index has been loaded by the
4127 gdb.dwarf2/gdb-index.exp testcase. */
4130 dw2_dump (struct objfile
*objfile
)
4132 struct dwarf2_per_objfile
*dwarf2_per_objfile
4133 = get_dwarf2_per_objfile (objfile
);
4135 gdb_assert (dwarf2_per_objfile
->using_index
);
4136 printf_filtered (".gdb_index:");
4137 if (dwarf2_per_objfile
->index_table
!= NULL
)
4139 printf_filtered (" version %d\n",
4140 dwarf2_per_objfile
->index_table
->version
);
4143 printf_filtered (" faked for \"readnow\"\n");
4144 printf_filtered ("\n");
4148 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4149 const char *func_name
)
4151 struct dwarf2_per_objfile
*dwarf2_per_objfile
4152 = get_dwarf2_per_objfile (objfile
);
4154 struct dw2_symtab_iterator iter
;
4155 struct dwarf2_per_cu_data
*per_cu
;
4157 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
4159 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4160 dw2_instantiate_symtab (per_cu
, false);
4165 dw2_expand_all_symtabs (struct objfile
*objfile
)
4167 struct dwarf2_per_objfile
*dwarf2_per_objfile
4168 = get_dwarf2_per_objfile (objfile
);
4169 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4170 + dwarf2_per_objfile
->all_type_units
.size ());
4172 for (int i
= 0; i
< total_units
; ++i
)
4174 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4176 /* We don't want to directly expand a partial CU, because if we
4177 read it with the wrong language, then assertion failures can
4178 be triggered later on. See PR symtab/23010. So, tell
4179 dw2_instantiate_symtab to skip partial CUs -- any important
4180 partial CU will be read via DW_TAG_imported_unit anyway. */
4181 dw2_instantiate_symtab (per_cu
, true);
4186 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4187 const char *fullname
)
4189 struct dwarf2_per_objfile
*dwarf2_per_objfile
4190 = get_dwarf2_per_objfile (objfile
);
4192 /* We don't need to consider type units here.
4193 This is only called for examining code, e.g. expand_line_sal.
4194 There can be an order of magnitude (or more) more type units
4195 than comp units, and we avoid them if we can. */
4197 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4199 /* We only need to look at symtabs not already expanded. */
4200 if (per_cu
->v
.quick
->compunit_symtab
)
4203 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4204 if (file_data
== NULL
)
4207 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4209 const char *this_fullname
= file_data
->file_names
[j
];
4211 if (filename_cmp (this_fullname
, fullname
) == 0)
4213 dw2_instantiate_symtab (per_cu
, false);
4221 dw2_map_matching_symbols
4222 (struct objfile
*objfile
,
4223 const lookup_name_info
&name
, domain_enum domain
,
4225 gdb::function_view
<symbol_found_callback_ftype
> callback
,
4226 symbol_compare_ftype
*ordered_compare
)
4228 /* Currently unimplemented; used for Ada. The function can be called if the
4229 current language is Ada for a non-Ada objfile using GNU index. As Ada
4230 does not look for non-Ada symbols this function should just return. */
4233 /* Starting from a search name, return the string that finds the upper
4234 bound of all strings that start with SEARCH_NAME in a sorted name
4235 list. Returns the empty string to indicate that the upper bound is
4236 the end of the list. */
4239 make_sort_after_prefix_name (const char *search_name
)
4241 /* When looking to complete "func", we find the upper bound of all
4242 symbols that start with "func" by looking for where we'd insert
4243 the closest string that would follow "func" in lexicographical
4244 order. Usually, that's "func"-with-last-character-incremented,
4245 i.e. "fund". Mind non-ASCII characters, though. Usually those
4246 will be UTF-8 multi-byte sequences, but we can't be certain.
4247 Especially mind the 0xff character, which is a valid character in
4248 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4249 rule out compilers allowing it in identifiers. Note that
4250 conveniently, strcmp/strcasecmp are specified to compare
4251 characters interpreted as unsigned char. So what we do is treat
4252 the whole string as a base 256 number composed of a sequence of
4253 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4254 to 0, and carries 1 to the following more-significant position.
4255 If the very first character in SEARCH_NAME ends up incremented
4256 and carries/overflows, then the upper bound is the end of the
4257 list. The string after the empty string is also the empty
4260 Some examples of this operation:
4262 SEARCH_NAME => "+1" RESULT
4266 "\xff" "a" "\xff" => "\xff" "b"
4271 Then, with these symbols for example:
4277 completing "func" looks for symbols between "func" and
4278 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4279 which finds "func" and "func1", but not "fund".
4283 funcÿ (Latin1 'ÿ' [0xff])
4287 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4288 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4292 ÿÿ (Latin1 'ÿ' [0xff])
4295 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4296 the end of the list.
4298 std::string after
= search_name
;
4299 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4301 if (!after
.empty ())
4302 after
.back () = (unsigned char) after
.back () + 1;
4306 /* See declaration. */
4308 std::pair
<std::vector
<name_component
>::const_iterator
,
4309 std::vector
<name_component
>::const_iterator
>
4310 mapped_index_base::find_name_components_bounds
4311 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
4314 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4316 const char *lang_name
4317 = lookup_name_without_params
.language_lookup_name (lang
).c_str ();
4319 /* Comparison function object for lower_bound that matches against a
4320 given symbol name. */
4321 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4324 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4325 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4326 return name_cmp (elem_name
, name
) < 0;
4329 /* Comparison function object for upper_bound that matches against a
4330 given symbol name. */
4331 auto lookup_compare_upper
= [&] (const char *name
,
4332 const name_component
&elem
)
4334 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4335 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4336 return name_cmp (name
, elem_name
) < 0;
4339 auto begin
= this->name_components
.begin ();
4340 auto end
= this->name_components
.end ();
4342 /* Find the lower bound. */
4345 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
4348 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
4351 /* Find the upper bound. */
4354 if (lookup_name_without_params
.completion_mode ())
4356 /* In completion mode, we want UPPER to point past all
4357 symbols names that have the same prefix. I.e., with
4358 these symbols, and completing "func":
4360 function << lower bound
4362 other_function << upper bound
4364 We find the upper bound by looking for the insertion
4365 point of "func"-with-last-character-incremented,
4367 std::string after
= make_sort_after_prefix_name (lang_name
);
4370 return std::lower_bound (lower
, end
, after
.c_str (),
4371 lookup_compare_lower
);
4374 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4377 return {lower
, upper
};
4380 /* See declaration. */
4383 mapped_index_base::build_name_components ()
4385 if (!this->name_components
.empty ())
4388 this->name_components_casing
= case_sensitivity
;
4390 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4392 /* The code below only knows how to break apart components of C++
4393 symbol names (and other languages that use '::' as
4394 namespace/module separator) and Ada symbol names. */
4395 auto count
= this->symbol_name_count ();
4396 for (offset_type idx
= 0; idx
< count
; idx
++)
4398 if (this->symbol_name_slot_invalid (idx
))
4401 const char *name
= this->symbol_name_at (idx
);
4403 /* Add each name component to the name component table. */
4404 unsigned int previous_len
= 0;
4406 if (strstr (name
, "::") != nullptr)
4408 for (unsigned int current_len
= cp_find_first_component (name
);
4409 name
[current_len
] != '\0';
4410 current_len
+= cp_find_first_component (name
+ current_len
))
4412 gdb_assert (name
[current_len
] == ':');
4413 this->name_components
.push_back ({previous_len
, idx
});
4414 /* Skip the '::'. */
4416 previous_len
= current_len
;
4421 /* Handle the Ada encoded (aka mangled) form here. */
4422 for (const char *iter
= strstr (name
, "__");
4424 iter
= strstr (iter
, "__"))
4426 this->name_components
.push_back ({previous_len
, idx
});
4428 previous_len
= iter
- name
;
4432 this->name_components
.push_back ({previous_len
, idx
});
4435 /* Sort name_components elements by name. */
4436 auto name_comp_compare
= [&] (const name_component
&left
,
4437 const name_component
&right
)
4439 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4440 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4442 const char *left_name
= left_qualified
+ left
.name_offset
;
4443 const char *right_name
= right_qualified
+ right
.name_offset
;
4445 return name_cmp (left_name
, right_name
) < 0;
4448 std::sort (this->name_components
.begin (),
4449 this->name_components
.end (),
4453 /* Helper for dw2_expand_symtabs_matching that works with a
4454 mapped_index_base instead of the containing objfile. This is split
4455 to a separate function in order to be able to unit test the
4456 name_components matching using a mock mapped_index_base. For each
4457 symbol name that matches, calls MATCH_CALLBACK, passing it the
4458 symbol's index in the mapped_index_base symbol table. */
4461 dw2_expand_symtabs_matching_symbol
4462 (mapped_index_base
&index
,
4463 const lookup_name_info
&lookup_name_in
,
4464 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4465 enum search_domain kind
,
4466 gdb::function_view
<bool (offset_type
)> match_callback
)
4468 lookup_name_info lookup_name_without_params
4469 = lookup_name_in
.make_ignore_params ();
4471 /* Build the symbol name component sorted vector, if we haven't
4473 index
.build_name_components ();
4475 /* The same symbol may appear more than once in the range though.
4476 E.g., if we're looking for symbols that complete "w", and we have
4477 a symbol named "w1::w2", we'll find the two name components for
4478 that same symbol in the range. To be sure we only call the
4479 callback once per symbol, we first collect the symbol name
4480 indexes that matched in a temporary vector and ignore
4482 std::vector
<offset_type
> matches
;
4484 struct name_and_matcher
4486 symbol_name_matcher_ftype
*matcher
;
4487 const std::string
&name
;
4489 bool operator== (const name_and_matcher
&other
) const
4491 return matcher
== other
.matcher
&& name
== other
.name
;
4495 /* A vector holding all the different symbol name matchers, for all
4497 std::vector
<name_and_matcher
> matchers
;
4499 for (int i
= 0; i
< nr_languages
; i
++)
4501 enum language lang_e
= (enum language
) i
;
4503 const language_defn
*lang
= language_def (lang_e
);
4504 symbol_name_matcher_ftype
*name_matcher
4505 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4507 name_and_matcher key
{
4509 lookup_name_without_params
.language_lookup_name (lang_e
)
4512 /* Don't insert the same comparison routine more than once.
4513 Note that we do this linear walk. This is not a problem in
4514 practice because the number of supported languages is
4516 if (std::find (matchers
.begin (), matchers
.end (), key
)
4519 matchers
.push_back (std::move (key
));
4522 = index
.find_name_components_bounds (lookup_name_without_params
,
4525 /* Now for each symbol name in range, check to see if we have a name
4526 match, and if so, call the MATCH_CALLBACK callback. */
4528 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4530 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4532 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4533 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4536 matches
.push_back (bounds
.first
->idx
);
4540 std::sort (matches
.begin (), matches
.end ());
4542 /* Finally call the callback, once per match. */
4544 for (offset_type idx
: matches
)
4548 if (!match_callback (idx
))
4554 /* Above we use a type wider than idx's for 'prev', since 0 and
4555 (offset_type)-1 are both possible values. */
4556 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4561 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4563 /* A mock .gdb_index/.debug_names-like name index table, enough to
4564 exercise dw2_expand_symtabs_matching_symbol, which works with the
4565 mapped_index_base interface. Builds an index from the symbol list
4566 passed as parameter to the constructor. */
4567 class mock_mapped_index
: public mapped_index_base
4570 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4571 : m_symbol_table (symbols
)
4574 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4576 /* Return the number of names in the symbol table. */
4577 size_t symbol_name_count () const override
4579 return m_symbol_table
.size ();
4582 /* Get the name of the symbol at IDX in the symbol table. */
4583 const char *symbol_name_at (offset_type idx
) const override
4585 return m_symbol_table
[idx
];
4589 gdb::array_view
<const char *> m_symbol_table
;
4592 /* Convenience function that converts a NULL pointer to a "<null>"
4593 string, to pass to print routines. */
4596 string_or_null (const char *str
)
4598 return str
!= NULL
? str
: "<null>";
4601 /* Check if a lookup_name_info built from
4602 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4603 index. EXPECTED_LIST is the list of expected matches, in expected
4604 matching order. If no match expected, then an empty list is
4605 specified. Returns true on success. On failure prints a warning
4606 indicating the file:line that failed, and returns false. */
4609 check_match (const char *file
, int line
,
4610 mock_mapped_index
&mock_index
,
4611 const char *name
, symbol_name_match_type match_type
,
4612 bool completion_mode
,
4613 std::initializer_list
<const char *> expected_list
)
4615 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4617 bool matched
= true;
4619 auto mismatch
= [&] (const char *expected_str
,
4622 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4623 "expected=\"%s\", got=\"%s\"\n"),
4625 (match_type
== symbol_name_match_type::FULL
4627 name
, string_or_null (expected_str
), string_or_null (got
));
4631 auto expected_it
= expected_list
.begin ();
4632 auto expected_end
= expected_list
.end ();
4634 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4636 [&] (offset_type idx
)
4638 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4639 const char *expected_str
4640 = expected_it
== expected_end
? NULL
: *expected_it
++;
4642 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4643 mismatch (expected_str
, matched_name
);
4647 const char *expected_str
4648 = expected_it
== expected_end
? NULL
: *expected_it
++;
4649 if (expected_str
!= NULL
)
4650 mismatch (expected_str
, NULL
);
4655 /* The symbols added to the mock mapped_index for testing (in
4657 static const char *test_symbols
[] = {
4666 "ns2::tmpl<int>::foo2",
4667 "(anonymous namespace)::A::B::C",
4669 /* These are used to check that the increment-last-char in the
4670 matching algorithm for completion doesn't match "t1_fund" when
4671 completing "t1_func". */
4677 /* A UTF-8 name with multi-byte sequences to make sure that
4678 cp-name-parser understands this as a single identifier ("função"
4679 is "function" in PT). */
4682 /* \377 (0xff) is Latin1 'ÿ'. */
4685 /* \377 (0xff) is Latin1 'ÿ'. */
4689 /* A name with all sorts of complications. Starts with "z" to make
4690 it easier for the completion tests below. */
4691 #define Z_SYM_NAME \
4692 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4693 "::tuple<(anonymous namespace)::ui*, " \
4694 "std::default_delete<(anonymous namespace)::ui>, void>"
4699 /* Returns true if the mapped_index_base::find_name_component_bounds
4700 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4701 in completion mode. */
4704 check_find_bounds_finds (mapped_index_base
&index
,
4705 const char *search_name
,
4706 gdb::array_view
<const char *> expected_syms
)
4708 lookup_name_info
lookup_name (search_name
,
4709 symbol_name_match_type::FULL
, true);
4711 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4714 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4715 if (distance
!= expected_syms
.size ())
4718 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4720 auto nc_elem
= bounds
.first
+ exp_elem
;
4721 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4722 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4729 /* Test the lower-level mapped_index::find_name_component_bounds
4733 test_mapped_index_find_name_component_bounds ()
4735 mock_mapped_index
mock_index (test_symbols
);
4737 mock_index
.build_name_components ();
4739 /* Test the lower-level mapped_index::find_name_component_bounds
4740 method in completion mode. */
4742 static const char *expected_syms
[] = {
4747 SELF_CHECK (check_find_bounds_finds (mock_index
,
4748 "t1_func", expected_syms
));
4751 /* Check that the increment-last-char in the name matching algorithm
4752 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4754 static const char *expected_syms1
[] = {
4758 SELF_CHECK (check_find_bounds_finds (mock_index
,
4759 "\377", expected_syms1
));
4761 static const char *expected_syms2
[] = {
4764 SELF_CHECK (check_find_bounds_finds (mock_index
,
4765 "\377\377", expected_syms2
));
4769 /* Test dw2_expand_symtabs_matching_symbol. */
4772 test_dw2_expand_symtabs_matching_symbol ()
4774 mock_mapped_index
mock_index (test_symbols
);
4776 /* We let all tests run until the end even if some fails, for debug
4778 bool any_mismatch
= false;
4780 /* Create the expected symbols list (an initializer_list). Needed
4781 because lists have commas, and we need to pass them to CHECK,
4782 which is a macro. */
4783 #define EXPECT(...) { __VA_ARGS__ }
4785 /* Wrapper for check_match that passes down the current
4786 __FILE__/__LINE__. */
4787 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4788 any_mismatch |= !check_match (__FILE__, __LINE__, \
4790 NAME, MATCH_TYPE, COMPLETION_MODE, \
4793 /* Identity checks. */
4794 for (const char *sym
: test_symbols
)
4796 /* Should be able to match all existing symbols. */
4797 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4800 /* Should be able to match all existing symbols with
4802 std::string with_params
= std::string (sym
) + "(int)";
4803 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4806 /* Should be able to match all existing symbols with
4807 parameters and qualifiers. */
4808 with_params
= std::string (sym
) + " ( int ) const";
4809 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4812 /* This should really find sym, but cp-name-parser.y doesn't
4813 know about lvalue/rvalue qualifiers yet. */
4814 with_params
= std::string (sym
) + " ( int ) &&";
4815 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4819 /* Check that the name matching algorithm for completion doesn't get
4820 confused with Latin1 'ÿ' / 0xff. */
4822 static const char str
[] = "\377";
4823 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4824 EXPECT ("\377", "\377\377123"));
4827 /* Check that the increment-last-char in the matching algorithm for
4828 completion doesn't match "t1_fund" when completing "t1_func". */
4830 static const char str
[] = "t1_func";
4831 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4832 EXPECT ("t1_func", "t1_func1"));
4835 /* Check that completion mode works at each prefix of the expected
4838 static const char str
[] = "function(int)";
4839 size_t len
= strlen (str
);
4842 for (size_t i
= 1; i
< len
; i
++)
4844 lookup
.assign (str
, i
);
4845 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4846 EXPECT ("function"));
4850 /* While "w" is a prefix of both components, the match function
4851 should still only be called once. */
4853 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4855 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4859 /* Same, with a "complicated" symbol. */
4861 static const char str
[] = Z_SYM_NAME
;
4862 size_t len
= strlen (str
);
4865 for (size_t i
= 1; i
< len
; i
++)
4867 lookup
.assign (str
, i
);
4868 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4869 EXPECT (Z_SYM_NAME
));
4873 /* In FULL mode, an incomplete symbol doesn't match. */
4875 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4879 /* A complete symbol with parameters matches any overload, since the
4880 index has no overload info. */
4882 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4883 EXPECT ("std::zfunction", "std::zfunction2"));
4884 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4885 EXPECT ("std::zfunction", "std::zfunction2"));
4886 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4887 EXPECT ("std::zfunction", "std::zfunction2"));
4890 /* Check that whitespace is ignored appropriately. A symbol with a
4891 template argument list. */
4893 static const char expected
[] = "ns::foo<int>";
4894 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4896 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4900 /* Check that whitespace is ignored appropriately. A symbol with a
4901 template argument list that includes a pointer. */
4903 static const char expected
[] = "ns::foo<char*>";
4904 /* Try both completion and non-completion modes. */
4905 static const bool completion_mode
[2] = {false, true};
4906 for (size_t i
= 0; i
< 2; i
++)
4908 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4909 completion_mode
[i
], EXPECT (expected
));
4910 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4911 completion_mode
[i
], EXPECT (expected
));
4913 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4914 completion_mode
[i
], EXPECT (expected
));
4915 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4916 completion_mode
[i
], EXPECT (expected
));
4921 /* Check method qualifiers are ignored. */
4922 static const char expected
[] = "ns::foo<char*>";
4923 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4924 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4925 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4926 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4927 CHECK_MATCH ("foo < char * > ( int ) const",
4928 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4929 CHECK_MATCH ("foo < char * > ( int ) &&",
4930 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4933 /* Test lookup names that don't match anything. */
4935 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4938 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4942 /* Some wild matching tests, exercising "(anonymous namespace)",
4943 which should not be confused with a parameter list. */
4945 static const char *syms
[] = {
4949 "A :: B :: C ( int )",
4954 for (const char *s
: syms
)
4956 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4957 EXPECT ("(anonymous namespace)::A::B::C"));
4962 static const char expected
[] = "ns2::tmpl<int>::foo2";
4963 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4965 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4969 SELF_CHECK (!any_mismatch
);
4978 test_mapped_index_find_name_component_bounds ();
4979 test_dw2_expand_symtabs_matching_symbol ();
4982 }} // namespace selftests::dw2_expand_symtabs_matching
4984 #endif /* GDB_SELF_TEST */
4986 /* If FILE_MATCHER is NULL or if PER_CU has
4987 dwarf2_per_cu_quick_data::MARK set (see
4988 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4989 EXPANSION_NOTIFY on it. */
4992 dw2_expand_symtabs_matching_one
4993 (struct dwarf2_per_cu_data
*per_cu
,
4994 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4995 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4997 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4999 bool symtab_was_null
5000 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5002 dw2_instantiate_symtab (per_cu
, false);
5004 if (expansion_notify
!= NULL
5006 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5007 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5011 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5012 matched, to expand corresponding CUs that were marked. IDX is the
5013 index of the symbol name that matched. */
5016 dw2_expand_marked_cus
5017 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5018 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5019 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5022 offset_type
*vec
, vec_len
, vec_idx
;
5023 bool global_seen
= false;
5024 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5026 vec
= (offset_type
*) (index
.constant_pool
5027 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5028 vec_len
= MAYBE_SWAP (vec
[0]);
5029 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5031 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5032 /* This value is only valid for index versions >= 7. */
5033 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5034 gdb_index_symbol_kind symbol_kind
=
5035 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5036 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5037 /* Only check the symbol attributes if they're present.
5038 Indices prior to version 7 don't record them,
5039 and indices >= 7 may elide them for certain symbols
5040 (gold does this). */
5043 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5045 /* Work around gold/15646. */
5048 if (!is_static
&& global_seen
)
5054 /* Only check the symbol's kind if it has one. */
5059 case VARIABLES_DOMAIN
:
5060 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5063 case FUNCTIONS_DOMAIN
:
5064 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5068 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5071 case MODULES_DOMAIN
:
5072 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
5080 /* Don't crash on bad data. */
5081 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5082 + dwarf2_per_objfile
->all_type_units
.size ()))
5084 complaint (_(".gdb_index entry has bad CU index"
5086 objfile_name (dwarf2_per_objfile
->objfile
));
5090 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5091 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5096 /* If FILE_MATCHER is non-NULL, set all the
5097 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5098 that match FILE_MATCHER. */
5101 dw_expand_symtabs_matching_file_matcher
5102 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5103 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5105 if (file_matcher
== NULL
)
5108 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5110 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5112 NULL
, xcalloc
, xfree
));
5113 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5115 NULL
, xcalloc
, xfree
));
5117 /* The rule is CUs specify all the files, including those used by
5118 any TU, so there's no need to scan TUs here. */
5120 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5124 per_cu
->v
.quick
->mark
= 0;
5126 /* We only need to look at symtabs not already expanded. */
5127 if (per_cu
->v
.quick
->compunit_symtab
)
5130 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5131 if (file_data
== NULL
)
5134 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5136 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5138 per_cu
->v
.quick
->mark
= 1;
5142 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5144 const char *this_real_name
;
5146 if (file_matcher (file_data
->file_names
[j
], false))
5148 per_cu
->v
.quick
->mark
= 1;
5152 /* Before we invoke realpath, which can get expensive when many
5153 files are involved, do a quick comparison of the basenames. */
5154 if (!basenames_may_differ
5155 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5159 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5160 if (file_matcher (this_real_name
, false))
5162 per_cu
->v
.quick
->mark
= 1;
5167 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5168 ? visited_found
.get ()
5169 : visited_not_found
.get (),
5176 dw2_expand_symtabs_matching
5177 (struct objfile
*objfile
,
5178 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5179 const lookup_name_info
&lookup_name
,
5180 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5181 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5182 enum search_domain kind
)
5184 struct dwarf2_per_objfile
*dwarf2_per_objfile
5185 = get_dwarf2_per_objfile (objfile
);
5187 /* index_table is NULL if OBJF_READNOW. */
5188 if (!dwarf2_per_objfile
->index_table
)
5191 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5193 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5195 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5197 kind
, [&] (offset_type idx
)
5199 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5200 expansion_notify
, kind
);
5205 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5208 static struct compunit_symtab
*
5209 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5214 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5215 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5218 if (cust
->includes
== NULL
)
5221 for (i
= 0; cust
->includes
[i
]; ++i
)
5223 struct compunit_symtab
*s
= cust
->includes
[i
];
5225 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5233 static struct compunit_symtab
*
5234 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5235 struct bound_minimal_symbol msymbol
,
5237 struct obj_section
*section
,
5240 struct dwarf2_per_cu_data
*data
;
5241 struct compunit_symtab
*result
;
5243 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5246 CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
5247 SECT_OFF_TEXT (objfile
));
5248 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5249 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5253 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5254 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5255 paddress (get_objfile_arch (objfile
), pc
));
5258 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5261 gdb_assert (result
!= NULL
);
5266 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5267 void *data
, int need_fullname
)
5269 struct dwarf2_per_objfile
*dwarf2_per_objfile
5270 = get_dwarf2_per_objfile (objfile
);
5272 if (!dwarf2_per_objfile
->filenames_cache
)
5274 dwarf2_per_objfile
->filenames_cache
.emplace ();
5276 htab_up
visited (htab_create_alloc (10,
5277 htab_hash_pointer
, htab_eq_pointer
,
5278 NULL
, xcalloc
, xfree
));
5280 /* The rule is CUs specify all the files, including those used
5281 by any TU, so there's no need to scan TUs here. We can
5282 ignore file names coming from already-expanded CUs. */
5284 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5286 if (per_cu
->v
.quick
->compunit_symtab
)
5288 void **slot
= htab_find_slot (visited
.get (),
5289 per_cu
->v
.quick
->file_names
,
5292 *slot
= per_cu
->v
.quick
->file_names
;
5296 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5298 /* We only need to look at symtabs not already expanded. */
5299 if (per_cu
->v
.quick
->compunit_symtab
)
5302 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5303 if (file_data
== NULL
)
5306 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5309 /* Already visited. */
5314 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5316 const char *filename
= file_data
->file_names
[j
];
5317 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5322 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5324 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5327 this_real_name
= gdb_realpath (filename
);
5328 (*fun
) (filename
, this_real_name
.get (), data
);
5333 dw2_has_symbols (struct objfile
*objfile
)
5338 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5341 dw2_find_last_source_symtab
,
5342 dw2_forget_cached_source_info
,
5343 dw2_map_symtabs_matching_filename
,
5347 dw2_expand_symtabs_for_function
,
5348 dw2_expand_all_symtabs
,
5349 dw2_expand_symtabs_with_fullname
,
5350 dw2_map_matching_symbols
,
5351 dw2_expand_symtabs_matching
,
5352 dw2_find_pc_sect_compunit_symtab
,
5354 dw2_map_symbol_filenames
5357 /* DWARF-5 debug_names reader. */
5359 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5360 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5362 /* A helper function that reads the .debug_names section in SECTION
5363 and fills in MAP. FILENAME is the name of the file containing the
5364 section; it is used for error reporting.
5366 Returns true if all went well, false otherwise. */
5369 read_debug_names_from_section (struct objfile
*objfile
,
5370 const char *filename
,
5371 struct dwarf2_section_info
*section
,
5372 mapped_debug_names
&map
)
5374 if (dwarf2_section_empty_p (section
))
5377 /* Older elfutils strip versions could keep the section in the main
5378 executable while splitting it for the separate debug info file. */
5379 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5382 dwarf2_read_section (objfile
, section
);
5384 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5386 const gdb_byte
*addr
= section
->buffer
;
5388 bfd
*const abfd
= get_section_bfd_owner (section
);
5390 unsigned int bytes_read
;
5391 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5394 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5395 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5396 if (bytes_read
+ length
!= section
->size
)
5398 /* There may be multiple per-CU indices. */
5399 warning (_("Section .debug_names in %s length %s does not match "
5400 "section length %s, ignoring .debug_names."),
5401 filename
, plongest (bytes_read
+ length
),
5402 pulongest (section
->size
));
5406 /* The version number. */
5407 uint16_t version
= read_2_bytes (abfd
, addr
);
5411 warning (_("Section .debug_names in %s has unsupported version %d, "
5412 "ignoring .debug_names."),
5418 uint16_t padding
= read_2_bytes (abfd
, addr
);
5422 warning (_("Section .debug_names in %s has unsupported padding %d, "
5423 "ignoring .debug_names."),
5428 /* comp_unit_count - The number of CUs in the CU list. */
5429 map
.cu_count
= read_4_bytes (abfd
, addr
);
5432 /* local_type_unit_count - The number of TUs in the local TU
5434 map
.tu_count
= read_4_bytes (abfd
, addr
);
5437 /* foreign_type_unit_count - The number of TUs in the foreign TU
5439 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5441 if (foreign_tu_count
!= 0)
5443 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5444 "ignoring .debug_names."),
5445 filename
, static_cast<unsigned long> (foreign_tu_count
));
5449 /* bucket_count - The number of hash buckets in the hash lookup
5451 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5454 /* name_count - The number of unique names in the index. */
5455 map
.name_count
= read_4_bytes (abfd
, addr
);
5458 /* abbrev_table_size - The size in bytes of the abbreviations
5460 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5463 /* augmentation_string_size - The size in bytes of the augmentation
5464 string. This value is rounded up to a multiple of 4. */
5465 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5467 map
.augmentation_is_gdb
= ((augmentation_string_size
5468 == sizeof (dwarf5_augmentation
))
5469 && memcmp (addr
, dwarf5_augmentation
,
5470 sizeof (dwarf5_augmentation
)) == 0);
5471 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5472 addr
+= augmentation_string_size
;
5475 map
.cu_table_reordered
= addr
;
5476 addr
+= map
.cu_count
* map
.offset_size
;
5478 /* List of Local TUs */
5479 map
.tu_table_reordered
= addr
;
5480 addr
+= map
.tu_count
* map
.offset_size
;
5482 /* Hash Lookup Table */
5483 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5484 addr
+= map
.bucket_count
* 4;
5485 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5486 addr
+= map
.name_count
* 4;
5489 map
.name_table_string_offs_reordered
= addr
;
5490 addr
+= map
.name_count
* map
.offset_size
;
5491 map
.name_table_entry_offs_reordered
= addr
;
5492 addr
+= map
.name_count
* map
.offset_size
;
5494 const gdb_byte
*abbrev_table_start
= addr
;
5497 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5502 const auto insertpair
5503 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5504 if (!insertpair
.second
)
5506 warning (_("Section .debug_names in %s has duplicate index %s, "
5507 "ignoring .debug_names."),
5508 filename
, pulongest (index_num
));
5511 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5512 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5517 mapped_debug_names::index_val::attr attr
;
5518 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5520 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5522 if (attr
.form
== DW_FORM_implicit_const
)
5524 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5528 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5530 indexval
.attr_vec
.push_back (std::move (attr
));
5533 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5535 warning (_("Section .debug_names in %s has abbreviation_table "
5536 "of size %s vs. written as %u, ignoring .debug_names."),
5537 filename
, plongest (addr
- abbrev_table_start
),
5541 map
.entry_pool
= addr
;
5546 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5550 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5551 const mapped_debug_names
&map
,
5552 dwarf2_section_info
§ion
,
5555 sect_offset sect_off_prev
;
5556 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5558 sect_offset sect_off_next
;
5559 if (i
< map
.cu_count
)
5562 = (sect_offset
) (extract_unsigned_integer
5563 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5565 map
.dwarf5_byte_order
));
5568 sect_off_next
= (sect_offset
) section
.size
;
5571 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5572 dwarf2_per_cu_data
*per_cu
5573 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5574 sect_off_prev
, length
);
5575 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5577 sect_off_prev
= sect_off_next
;
5581 /* Read the CU list from the mapped index, and use it to create all
5582 the CU objects for this dwarf2_per_objfile. */
5585 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5586 const mapped_debug_names
&map
,
5587 const mapped_debug_names
&dwz_map
)
5589 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5590 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5592 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5593 dwarf2_per_objfile
->info
,
5594 false /* is_dwz */);
5596 if (dwz_map
.cu_count
== 0)
5599 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5600 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5604 /* Read .debug_names. If everything went ok, initialize the "quick"
5605 elements of all the CUs and return true. Otherwise, return false. */
5608 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5610 std::unique_ptr
<mapped_debug_names
> map
5611 (new mapped_debug_names (dwarf2_per_objfile
));
5612 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5613 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5615 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5616 &dwarf2_per_objfile
->debug_names
,
5620 /* Don't use the index if it's empty. */
5621 if (map
->name_count
== 0)
5624 /* If there is a .dwz file, read it so we can get its CU list as
5626 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5629 if (!read_debug_names_from_section (objfile
,
5630 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5631 &dwz
->debug_names
, dwz_map
))
5633 warning (_("could not read '.debug_names' section from %s; skipping"),
5634 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5639 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5641 if (map
->tu_count
!= 0)
5643 /* We can only handle a single .debug_types when we have an
5645 if (dwarf2_per_objfile
->types
.size () != 1)
5648 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5650 create_signatured_type_table_from_debug_names
5651 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5654 create_addrmap_from_aranges (dwarf2_per_objfile
,
5655 &dwarf2_per_objfile
->debug_aranges
);
5657 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5658 dwarf2_per_objfile
->using_index
= 1;
5659 dwarf2_per_objfile
->quick_file_names_table
=
5660 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5665 /* Type used to manage iterating over all CUs looking for a symbol for
5668 class dw2_debug_names_iterator
5671 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5672 gdb::optional
<block_enum
> block_index
,
5675 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5676 m_addr (find_vec_in_debug_names (map
, name
))
5679 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5680 search_domain search
, uint32_t namei
)
5683 m_addr (find_vec_in_debug_names (map
, namei
))
5686 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5687 block_enum block_index
, domain_enum domain
,
5689 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5690 m_addr (find_vec_in_debug_names (map
, namei
))
5693 /* Return the next matching CU or NULL if there are no more. */
5694 dwarf2_per_cu_data
*next ();
5697 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5699 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5702 /* The internalized form of .debug_names. */
5703 const mapped_debug_names
&m_map
;
5705 /* If set, only look for symbols that match that block. Valid values are
5706 GLOBAL_BLOCK and STATIC_BLOCK. */
5707 const gdb::optional
<block_enum
> m_block_index
;
5709 /* The kind of symbol we're looking for. */
5710 const domain_enum m_domain
= UNDEF_DOMAIN
;
5711 const search_domain m_search
= ALL_DOMAIN
;
5713 /* The list of CUs from the index entry of the symbol, or NULL if
5715 const gdb_byte
*m_addr
;
5719 mapped_debug_names::namei_to_name (uint32_t namei
) const
5721 const ULONGEST namei_string_offs
5722 = extract_unsigned_integer ((name_table_string_offs_reordered
5723 + namei
* offset_size
),
5726 return read_indirect_string_at_offset
5727 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5730 /* Find a slot in .debug_names for the object named NAME. If NAME is
5731 found, return pointer to its pool data. If NAME cannot be found,
5735 dw2_debug_names_iterator::find_vec_in_debug_names
5736 (const mapped_debug_names
&map
, const char *name
)
5738 int (*cmp
) (const char *, const char *);
5740 gdb::unique_xmalloc_ptr
<char> without_params
;
5741 if (current_language
->la_language
== language_cplus
5742 || current_language
->la_language
== language_fortran
5743 || current_language
->la_language
== language_d
)
5745 /* NAME is already canonical. Drop any qualifiers as
5746 .debug_names does not contain any. */
5748 if (strchr (name
, '(') != NULL
)
5750 without_params
= cp_remove_params (name
);
5751 if (without_params
!= NULL
)
5752 name
= without_params
.get ();
5756 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5758 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5760 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5761 (map
.bucket_table_reordered
5762 + (full_hash
% map
.bucket_count
)), 4,
5763 map
.dwarf5_byte_order
);
5767 if (namei
>= map
.name_count
)
5769 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5771 namei
, map
.name_count
,
5772 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5778 const uint32_t namei_full_hash
5779 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5780 (map
.hash_table_reordered
+ namei
), 4,
5781 map
.dwarf5_byte_order
);
5782 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5785 if (full_hash
== namei_full_hash
)
5787 const char *const namei_string
= map
.namei_to_name (namei
);
5789 #if 0 /* An expensive sanity check. */
5790 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5792 complaint (_("Wrong .debug_names hash for string at index %u "
5794 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5799 if (cmp (namei_string
, name
) == 0)
5801 const ULONGEST namei_entry_offs
5802 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5803 + namei
* map
.offset_size
),
5804 map
.offset_size
, map
.dwarf5_byte_order
);
5805 return map
.entry_pool
+ namei_entry_offs
;
5810 if (namei
>= map
.name_count
)
5816 dw2_debug_names_iterator::find_vec_in_debug_names
5817 (const mapped_debug_names
&map
, uint32_t namei
)
5819 if (namei
>= map
.name_count
)
5821 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5823 namei
, map
.name_count
,
5824 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5828 const ULONGEST namei_entry_offs
5829 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5830 + namei
* map
.offset_size
),
5831 map
.offset_size
, map
.dwarf5_byte_order
);
5832 return map
.entry_pool
+ namei_entry_offs
;
5835 /* See dw2_debug_names_iterator. */
5837 dwarf2_per_cu_data
*
5838 dw2_debug_names_iterator::next ()
5843 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5844 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5845 bfd
*const abfd
= objfile
->obfd
;
5849 unsigned int bytes_read
;
5850 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5851 m_addr
+= bytes_read
;
5855 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5856 if (indexval_it
== m_map
.abbrev_map
.cend ())
5858 complaint (_("Wrong .debug_names undefined abbrev code %s "
5860 pulongest (abbrev
), objfile_name (objfile
));
5863 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5864 enum class symbol_linkage
{
5868 } symbol_linkage_
= symbol_linkage::unknown
;
5869 dwarf2_per_cu_data
*per_cu
= NULL
;
5870 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5875 case DW_FORM_implicit_const
:
5876 ull
= attr
.implicit_const
;
5878 case DW_FORM_flag_present
:
5882 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5883 m_addr
+= bytes_read
;
5886 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5887 dwarf_form_name (attr
.form
),
5888 objfile_name (objfile
));
5891 switch (attr
.dw_idx
)
5893 case DW_IDX_compile_unit
:
5894 /* Don't crash on bad data. */
5895 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5897 complaint (_(".debug_names entry has bad CU index %s"
5900 objfile_name (dwarf2_per_objfile
->objfile
));
5903 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5905 case DW_IDX_type_unit
:
5906 /* Don't crash on bad data. */
5907 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5909 complaint (_(".debug_names entry has bad TU index %s"
5912 objfile_name (dwarf2_per_objfile
->objfile
));
5915 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5917 case DW_IDX_GNU_internal
:
5918 if (!m_map
.augmentation_is_gdb
)
5920 symbol_linkage_
= symbol_linkage::static_
;
5922 case DW_IDX_GNU_external
:
5923 if (!m_map
.augmentation_is_gdb
)
5925 symbol_linkage_
= symbol_linkage::extern_
;
5930 /* Skip if already read in. */
5931 if (per_cu
->v
.quick
->compunit_symtab
)
5934 /* Check static vs global. */
5935 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5937 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5938 const bool symbol_is_static
=
5939 symbol_linkage_
== symbol_linkage::static_
;
5940 if (want_static
!= symbol_is_static
)
5944 /* Match dw2_symtab_iter_next, symbol_kind
5945 and debug_names::psymbol_tag. */
5949 switch (indexval
.dwarf_tag
)
5951 case DW_TAG_variable
:
5952 case DW_TAG_subprogram
:
5953 /* Some types are also in VAR_DOMAIN. */
5954 case DW_TAG_typedef
:
5955 case DW_TAG_structure_type
:
5962 switch (indexval
.dwarf_tag
)
5964 case DW_TAG_typedef
:
5965 case DW_TAG_structure_type
:
5972 switch (indexval
.dwarf_tag
)
5975 case DW_TAG_variable
:
5982 switch (indexval
.dwarf_tag
)
5994 /* Match dw2_expand_symtabs_matching, symbol_kind and
5995 debug_names::psymbol_tag. */
5998 case VARIABLES_DOMAIN
:
5999 switch (indexval
.dwarf_tag
)
6001 case DW_TAG_variable
:
6007 case FUNCTIONS_DOMAIN
:
6008 switch (indexval
.dwarf_tag
)
6010 case DW_TAG_subprogram
:
6017 switch (indexval
.dwarf_tag
)
6019 case DW_TAG_typedef
:
6020 case DW_TAG_structure_type
:
6026 case MODULES_DOMAIN
:
6027 switch (indexval
.dwarf_tag
)
6041 static struct compunit_symtab
*
6042 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
6043 const char *name
, domain_enum domain
)
6045 struct dwarf2_per_objfile
*dwarf2_per_objfile
6046 = get_dwarf2_per_objfile (objfile
);
6048 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6051 /* index is NULL if OBJF_READNOW. */
6054 const auto &map
= *mapp
;
6056 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
6058 struct compunit_symtab
*stab_best
= NULL
;
6059 struct dwarf2_per_cu_data
*per_cu
;
6060 while ((per_cu
= iter
.next ()) != NULL
)
6062 struct symbol
*sym
, *with_opaque
= NULL
;
6063 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6064 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6065 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6067 sym
= block_find_symbol (block
, name
, domain
,
6068 block_find_non_opaque_type_preferred
,
6071 /* Some caution must be observed with overloaded functions and
6072 methods, since the index will not contain any overload
6073 information (but NAME might contain it). */
6076 && strcmp_iw (sym
->search_name (), name
) == 0)
6078 if (with_opaque
!= NULL
6079 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
6082 /* Keep looking through other CUs. */
6088 /* This dumps minimal information about .debug_names. It is called
6089 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6090 uses this to verify that .debug_names has been loaded. */
6093 dw2_debug_names_dump (struct objfile
*objfile
)
6095 struct dwarf2_per_objfile
*dwarf2_per_objfile
6096 = get_dwarf2_per_objfile (objfile
);
6098 gdb_assert (dwarf2_per_objfile
->using_index
);
6099 printf_filtered (".debug_names:");
6100 if (dwarf2_per_objfile
->debug_names_table
)
6101 printf_filtered (" exists\n");
6103 printf_filtered (" faked for \"readnow\"\n");
6104 printf_filtered ("\n");
6108 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6109 const char *func_name
)
6111 struct dwarf2_per_objfile
*dwarf2_per_objfile
6112 = get_dwarf2_per_objfile (objfile
);
6114 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6115 if (dwarf2_per_objfile
->debug_names_table
)
6117 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6119 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
6121 struct dwarf2_per_cu_data
*per_cu
;
6122 while ((per_cu
= iter
.next ()) != NULL
)
6123 dw2_instantiate_symtab (per_cu
, false);
6128 dw2_debug_names_map_matching_symbols
6129 (struct objfile
*objfile
,
6130 const lookup_name_info
&name
, domain_enum domain
,
6132 gdb::function_view
<symbol_found_callback_ftype
> callback
,
6133 symbol_compare_ftype
*ordered_compare
)
6135 struct dwarf2_per_objfile
*dwarf2_per_objfile
6136 = get_dwarf2_per_objfile (objfile
);
6138 /* debug_names_table is NULL if OBJF_READNOW. */
6139 if (!dwarf2_per_objfile
->debug_names_table
)
6142 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6143 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
6145 const char *match_name
= name
.ada ().lookup_name ().c_str ();
6146 auto matcher
= [&] (const char *symname
)
6148 if (ordered_compare
== nullptr)
6150 return ordered_compare (symname
, match_name
) == 0;
6153 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
6154 [&] (offset_type namei
)
6156 /* The name was matched, now expand corresponding CUs that were
6158 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
6160 struct dwarf2_per_cu_data
*per_cu
;
6161 while ((per_cu
= iter
.next ()) != NULL
)
6162 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
6166 /* It's a shame we couldn't do this inside the
6167 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
6168 that have already been expanded. Instead, this loop matches what
6169 the psymtab code does. */
6170 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
6172 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
6173 if (cust
!= nullptr)
6175 const struct block
*block
6176 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
6177 if (!iterate_over_symbols_terminated (block
, name
,
6185 dw2_debug_names_expand_symtabs_matching
6186 (struct objfile
*objfile
,
6187 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6188 const lookup_name_info
&lookup_name
,
6189 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6190 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6191 enum search_domain kind
)
6193 struct dwarf2_per_objfile
*dwarf2_per_objfile
6194 = get_dwarf2_per_objfile (objfile
);
6196 /* debug_names_table is NULL if OBJF_READNOW. */
6197 if (!dwarf2_per_objfile
->debug_names_table
)
6200 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6202 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6204 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6206 kind
, [&] (offset_type namei
)
6208 /* The name was matched, now expand corresponding CUs that were
6210 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6212 struct dwarf2_per_cu_data
*per_cu
;
6213 while ((per_cu
= iter
.next ()) != NULL
)
6214 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6220 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6223 dw2_find_last_source_symtab
,
6224 dw2_forget_cached_source_info
,
6225 dw2_map_symtabs_matching_filename
,
6226 dw2_debug_names_lookup_symbol
,
6228 dw2_debug_names_dump
,
6229 dw2_debug_names_expand_symtabs_for_function
,
6230 dw2_expand_all_symtabs
,
6231 dw2_expand_symtabs_with_fullname
,
6232 dw2_debug_names_map_matching_symbols
,
6233 dw2_debug_names_expand_symtabs_matching
,
6234 dw2_find_pc_sect_compunit_symtab
,
6236 dw2_map_symbol_filenames
6239 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6240 to either a dwarf2_per_objfile or dwz_file object. */
6242 template <typename T
>
6243 static gdb::array_view
<const gdb_byte
>
6244 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6246 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6248 if (dwarf2_section_empty_p (section
))
6251 /* Older elfutils strip versions could keep the section in the main
6252 executable while splitting it for the separate debug info file. */
6253 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
6256 dwarf2_read_section (obj
, section
);
6258 /* dwarf2_section_info::size is a bfd_size_type, while
6259 gdb::array_view works with size_t. On 32-bit hosts, with
6260 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6261 is 32-bit. So we need an explicit narrowing conversion here.
6262 This is fine, because it's impossible to allocate or mmap an
6263 array/buffer larger than what size_t can represent. */
6264 return gdb::make_array_view (section
->buffer
, section
->size
);
6267 /* Lookup the index cache for the contents of the index associated to
6270 static gdb::array_view
<const gdb_byte
>
6271 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
6273 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6274 if (build_id
== nullptr)
6277 return global_index_cache
.lookup_gdb_index (build_id
,
6278 &dwarf2_obj
->index_cache_res
);
6281 /* Same as the above, but for DWZ. */
6283 static gdb::array_view
<const gdb_byte
>
6284 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6286 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6287 if (build_id
== nullptr)
6290 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6293 /* See symfile.h. */
6296 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6298 struct dwarf2_per_objfile
*dwarf2_per_objfile
6299 = get_dwarf2_per_objfile (objfile
);
6301 /* If we're about to read full symbols, don't bother with the
6302 indices. In this case we also don't care if some other debug
6303 format is making psymtabs, because they are all about to be
6305 if ((objfile
->flags
& OBJF_READNOW
))
6307 dwarf2_per_objfile
->using_index
= 1;
6308 create_all_comp_units (dwarf2_per_objfile
);
6309 create_all_type_units (dwarf2_per_objfile
);
6310 dwarf2_per_objfile
->quick_file_names_table
6311 = create_quick_file_names_table
6312 (dwarf2_per_objfile
->all_comp_units
.size ());
6314 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6315 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6317 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6319 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6320 struct dwarf2_per_cu_quick_data
);
6323 /* Return 1 so that gdb sees the "quick" functions. However,
6324 these functions will be no-ops because we will have expanded
6326 *index_kind
= dw_index_kind::GDB_INDEX
;
6330 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6332 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6336 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6337 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6338 get_gdb_index_contents_from_section
<dwz_file
>))
6340 *index_kind
= dw_index_kind::GDB_INDEX
;
6344 /* ... otherwise, try to find the index in the index cache. */
6345 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6346 get_gdb_index_contents_from_cache
,
6347 get_gdb_index_contents_from_cache_dwz
))
6349 global_index_cache
.hit ();
6350 *index_kind
= dw_index_kind::GDB_INDEX
;
6354 global_index_cache
.miss ();
6360 /* Build a partial symbol table. */
6363 dwarf2_build_psymtabs (struct objfile
*objfile
)
6365 struct dwarf2_per_objfile
*dwarf2_per_objfile
6366 = get_dwarf2_per_objfile (objfile
);
6368 init_psymbol_list (objfile
, 1024);
6372 /* This isn't really ideal: all the data we allocate on the
6373 objfile's obstack is still uselessly kept around. However,
6374 freeing it seems unsafe. */
6375 psymtab_discarder
psymtabs (objfile
);
6376 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6379 /* (maybe) store an index in the cache. */
6380 global_index_cache
.store (dwarf2_per_objfile
);
6382 catch (const gdb_exception_error
&except
)
6384 exception_print (gdb_stderr
, except
);
6388 /* Return the total length of the CU described by HEADER. */
6391 get_cu_length (const struct comp_unit_head
*header
)
6393 return header
->initial_length_size
+ header
->length
;
6396 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6399 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6401 sect_offset bottom
= cu_header
->sect_off
;
6402 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6404 return sect_off
>= bottom
&& sect_off
< top
;
6407 /* Find the base address of the compilation unit for range lists and
6408 location lists. It will normally be specified by DW_AT_low_pc.
6409 In DWARF-3 draft 4, the base address could be overridden by
6410 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6411 compilation units with discontinuous ranges. */
6414 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6416 struct attribute
*attr
;
6419 cu
->base_address
= 0;
6421 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6422 if (attr
!= nullptr)
6424 cu
->base_address
= attr_value_as_address (attr
);
6429 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6430 if (attr
!= nullptr)
6432 cu
->base_address
= attr_value_as_address (attr
);
6438 /* Read in the comp unit header information from the debug_info at info_ptr.
6439 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6440 NOTE: This leaves members offset, first_die_offset to be filled in
6443 static const gdb_byte
*
6444 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6445 const gdb_byte
*info_ptr
,
6446 struct dwarf2_section_info
*section
,
6447 rcuh_kind section_kind
)
6450 unsigned int bytes_read
;
6451 const char *filename
= get_section_file_name (section
);
6452 bfd
*abfd
= get_section_bfd_owner (section
);
6454 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6455 cu_header
->initial_length_size
= bytes_read
;
6456 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6457 info_ptr
+= bytes_read
;
6458 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6459 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6460 error (_("Dwarf Error: wrong version in compilation unit header "
6461 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6462 cu_header
->version
, filename
);
6464 if (cu_header
->version
< 5)
6465 switch (section_kind
)
6467 case rcuh_kind::COMPILE
:
6468 cu_header
->unit_type
= DW_UT_compile
;
6470 case rcuh_kind::TYPE
:
6471 cu_header
->unit_type
= DW_UT_type
;
6474 internal_error (__FILE__
, __LINE__
,
6475 _("read_comp_unit_head: invalid section_kind"));
6479 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6480 (read_1_byte (abfd
, info_ptr
));
6482 switch (cu_header
->unit_type
)
6486 case DW_UT_skeleton
:
6487 case DW_UT_split_compile
:
6488 if (section_kind
!= rcuh_kind::COMPILE
)
6489 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6490 "(is %s, should be %s) [in module %s]"),
6491 dwarf_unit_type_name (cu_header
->unit_type
),
6492 dwarf_unit_type_name (DW_UT_type
), filename
);
6495 case DW_UT_split_type
:
6496 section_kind
= rcuh_kind::TYPE
;
6499 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6500 "(is %#04x, should be one of: %s, %s, %s, %s or %s) "
6501 "[in module %s]"), cu_header
->unit_type
,
6502 dwarf_unit_type_name (DW_UT_compile
),
6503 dwarf_unit_type_name (DW_UT_skeleton
),
6504 dwarf_unit_type_name (DW_UT_split_compile
),
6505 dwarf_unit_type_name (DW_UT_type
),
6506 dwarf_unit_type_name (DW_UT_split_type
), filename
);
6509 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6512 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6515 info_ptr
+= bytes_read
;
6516 if (cu_header
->version
< 5)
6518 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6521 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6522 if (signed_addr
< 0)
6523 internal_error (__FILE__
, __LINE__
,
6524 _("read_comp_unit_head: dwarf from non elf file"));
6525 cu_header
->signed_addr_p
= signed_addr
;
6527 bool header_has_signature
= section_kind
== rcuh_kind::TYPE
6528 || cu_header
->unit_type
== DW_UT_skeleton
6529 || cu_header
->unit_type
== DW_UT_split_compile
;
6531 if (header_has_signature
)
6533 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6537 if (section_kind
== rcuh_kind::TYPE
)
6539 LONGEST type_offset
;
6540 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6541 info_ptr
+= bytes_read
;
6542 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6543 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6544 error (_("Dwarf Error: Too big type_offset in compilation unit "
6545 "header (is %s) [in module %s]"), plongest (type_offset
),
6552 /* Helper function that returns the proper abbrev section for
6555 static struct dwarf2_section_info
*
6556 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6558 struct dwarf2_section_info
*abbrev
;
6559 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6561 if (this_cu
->is_dwz
)
6562 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6564 abbrev
= &dwarf2_per_objfile
->abbrev
;
6569 /* Subroutine of read_and_check_comp_unit_head and
6570 read_and_check_type_unit_head to simplify them.
6571 Perform various error checking on the header. */
6574 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6575 struct comp_unit_head
*header
,
6576 struct dwarf2_section_info
*section
,
6577 struct dwarf2_section_info
*abbrev_section
)
6579 const char *filename
= get_section_file_name (section
);
6581 if (to_underlying (header
->abbrev_sect_off
)
6582 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6583 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6584 "(offset %s + 6) [in module %s]"),
6585 sect_offset_str (header
->abbrev_sect_off
),
6586 sect_offset_str (header
->sect_off
),
6589 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6590 avoid potential 32-bit overflow. */
6591 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6593 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6594 "(offset %s + 0) [in module %s]"),
6595 header
->length
, sect_offset_str (header
->sect_off
),
6599 /* Read in a CU/TU header and perform some basic error checking.
6600 The contents of the header are stored in HEADER.
6601 The result is a pointer to the start of the first DIE. */
6603 static const gdb_byte
*
6604 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6605 struct comp_unit_head
*header
,
6606 struct dwarf2_section_info
*section
,
6607 struct dwarf2_section_info
*abbrev_section
,
6608 const gdb_byte
*info_ptr
,
6609 rcuh_kind section_kind
)
6611 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6613 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6615 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6617 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6619 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6625 /* Fetch the abbreviation table offset from a comp or type unit header. */
6628 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6629 struct dwarf2_section_info
*section
,
6630 sect_offset sect_off
)
6632 bfd
*abfd
= get_section_bfd_owner (section
);
6633 const gdb_byte
*info_ptr
;
6634 unsigned int initial_length_size
, offset_size
;
6637 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6638 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6639 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6640 offset_size
= initial_length_size
== 4 ? 4 : 8;
6641 info_ptr
+= initial_length_size
;
6643 version
= read_2_bytes (abfd
, info_ptr
);
6647 /* Skip unit type and address size. */
6651 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6654 /* Allocate a new partial symtab for file named NAME and mark this new
6655 partial symtab as being an include of PST. */
6658 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6659 struct objfile
*objfile
)
6661 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6663 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6665 /* It shares objfile->objfile_obstack. */
6666 subpst
->dirname
= pst
->dirname
;
6669 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6670 subpst
->dependencies
[0] = pst
;
6671 subpst
->number_of_dependencies
= 1;
6673 subpst
->read_symtab
= pst
->read_symtab
;
6675 /* No private part is necessary for include psymtabs. This property
6676 can be used to differentiate between such include psymtabs and
6677 the regular ones. */
6678 subpst
->read_symtab_private
= NULL
;
6681 /* Read the Line Number Program data and extract the list of files
6682 included by the source file represented by PST. Build an include
6683 partial symtab for each of these included files. */
6686 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6687 struct die_info
*die
,
6688 struct partial_symtab
*pst
)
6691 struct attribute
*attr
;
6693 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6694 if (attr
!= nullptr)
6695 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6697 return; /* No linetable, so no includes. */
6699 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6700 that we pass in the raw text_low here; that is ok because we're
6701 only decoding the line table to make include partial symtabs, and
6702 so the addresses aren't really used. */
6703 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6704 pst
->raw_text_low (), 1);
6708 hash_signatured_type (const void *item
)
6710 const struct signatured_type
*sig_type
6711 = (const struct signatured_type
*) item
;
6713 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6714 return sig_type
->signature
;
6718 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6720 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6721 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6723 return lhs
->signature
== rhs
->signature
;
6726 /* Allocate a hash table for signatured types. */
6729 allocate_signatured_type_table (struct objfile
*objfile
)
6731 return htab_create_alloc_ex (41,
6732 hash_signatured_type
,
6735 &objfile
->objfile_obstack
,
6736 hashtab_obstack_allocate
,
6737 dummy_obstack_deallocate
);
6740 /* A helper function to add a signatured type CU to a table. */
6743 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6745 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6746 std::vector
<signatured_type
*> *all_type_units
6747 = (std::vector
<signatured_type
*> *) datum
;
6749 all_type_units
->push_back (sigt
);
6754 /* A helper for create_debug_types_hash_table. Read types from SECTION
6755 and fill them into TYPES_HTAB. It will process only type units,
6756 therefore DW_UT_type. */
6759 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6760 struct dwo_file
*dwo_file
,
6761 dwarf2_section_info
*section
, htab_t
&types_htab
,
6762 rcuh_kind section_kind
)
6764 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6765 struct dwarf2_section_info
*abbrev_section
;
6767 const gdb_byte
*info_ptr
, *end_ptr
;
6769 abbrev_section
= (dwo_file
!= NULL
6770 ? &dwo_file
->sections
.abbrev
6771 : &dwarf2_per_objfile
->abbrev
);
6773 if (dwarf_read_debug
)
6774 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6775 get_section_name (section
),
6776 get_section_file_name (abbrev_section
));
6778 dwarf2_read_section (objfile
, section
);
6779 info_ptr
= section
->buffer
;
6781 if (info_ptr
== NULL
)
6784 /* We can't set abfd until now because the section may be empty or
6785 not present, in which case the bfd is unknown. */
6786 abfd
= get_section_bfd_owner (section
);
6788 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6789 because we don't need to read any dies: the signature is in the
6792 end_ptr
= info_ptr
+ section
->size
;
6793 while (info_ptr
< end_ptr
)
6795 struct signatured_type
*sig_type
;
6796 struct dwo_unit
*dwo_tu
;
6798 const gdb_byte
*ptr
= info_ptr
;
6799 struct comp_unit_head header
;
6800 unsigned int length
;
6802 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6804 /* Initialize it due to a false compiler warning. */
6805 header
.signature
= -1;
6806 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6808 /* We need to read the type's signature in order to build the hash
6809 table, but we don't need anything else just yet. */
6811 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6812 abbrev_section
, ptr
, section_kind
);
6814 length
= get_cu_length (&header
);
6816 /* Skip dummy type units. */
6817 if (ptr
>= info_ptr
+ length
6818 || peek_abbrev_code (abfd
, ptr
) == 0
6819 || header
.unit_type
!= DW_UT_type
)
6825 if (types_htab
== NULL
)
6828 types_htab
= allocate_dwo_unit_table (objfile
);
6830 types_htab
= allocate_signatured_type_table (objfile
);
6836 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6838 dwo_tu
->dwo_file
= dwo_file
;
6839 dwo_tu
->signature
= header
.signature
;
6840 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6841 dwo_tu
->section
= section
;
6842 dwo_tu
->sect_off
= sect_off
;
6843 dwo_tu
->length
= length
;
6847 /* N.B.: type_offset is not usable if this type uses a DWO file.
6848 The real type_offset is in the DWO file. */
6850 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6851 struct signatured_type
);
6852 sig_type
->signature
= header
.signature
;
6853 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6854 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6855 sig_type
->per_cu
.is_debug_types
= 1;
6856 sig_type
->per_cu
.section
= section
;
6857 sig_type
->per_cu
.sect_off
= sect_off
;
6858 sig_type
->per_cu
.length
= length
;
6861 slot
= htab_find_slot (types_htab
,
6862 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6864 gdb_assert (slot
!= NULL
);
6867 sect_offset dup_sect_off
;
6871 const struct dwo_unit
*dup_tu
6872 = (const struct dwo_unit
*) *slot
;
6874 dup_sect_off
= dup_tu
->sect_off
;
6878 const struct signatured_type
*dup_tu
6879 = (const struct signatured_type
*) *slot
;
6881 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6884 complaint (_("debug type entry at offset %s is duplicate to"
6885 " the entry at offset %s, signature %s"),
6886 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6887 hex_string (header
.signature
));
6889 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6891 if (dwarf_read_debug
> 1)
6892 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6893 sect_offset_str (sect_off
),
6894 hex_string (header
.signature
));
6900 /* Create the hash table of all entries in the .debug_types
6901 (or .debug_types.dwo) section(s).
6902 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6903 otherwise it is NULL.
6905 The result is a pointer to the hash table or NULL if there are no types.
6907 Note: This function processes DWO files only, not DWP files. */
6910 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6911 struct dwo_file
*dwo_file
,
6912 gdb::array_view
<dwarf2_section_info
> type_sections
,
6915 for (dwarf2_section_info
§ion
: type_sections
)
6916 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6917 types_htab
, rcuh_kind::TYPE
);
6920 /* Create the hash table of all entries in the .debug_types section,
6921 and initialize all_type_units.
6922 The result is zero if there is an error (e.g. missing .debug_types section),
6923 otherwise non-zero. */
6926 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6928 htab_t types_htab
= NULL
;
6930 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6931 &dwarf2_per_objfile
->info
, types_htab
,
6932 rcuh_kind::COMPILE
);
6933 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6934 dwarf2_per_objfile
->types
, types_htab
);
6935 if (types_htab
== NULL
)
6937 dwarf2_per_objfile
->signatured_types
= NULL
;
6941 dwarf2_per_objfile
->signatured_types
= types_htab
;
6943 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6944 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6946 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6947 &dwarf2_per_objfile
->all_type_units
);
6952 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6953 If SLOT is non-NULL, it is the entry to use in the hash table.
6954 Otherwise we find one. */
6956 static struct signatured_type
*
6957 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6960 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6962 if (dwarf2_per_objfile
->all_type_units
.size ()
6963 == dwarf2_per_objfile
->all_type_units
.capacity ())
6964 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6966 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6967 struct signatured_type
);
6969 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6970 sig_type
->signature
= sig
;
6971 sig_type
->per_cu
.is_debug_types
= 1;
6972 if (dwarf2_per_objfile
->using_index
)
6974 sig_type
->per_cu
.v
.quick
=
6975 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6976 struct dwarf2_per_cu_quick_data
);
6981 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6984 gdb_assert (*slot
== NULL
);
6986 /* The rest of sig_type must be filled in by the caller. */
6990 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6991 Fill in SIG_ENTRY with DWO_ENTRY. */
6994 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6995 struct signatured_type
*sig_entry
,
6996 struct dwo_unit
*dwo_entry
)
6998 /* Make sure we're not clobbering something we don't expect to. */
6999 gdb_assert (! sig_entry
->per_cu
.queued
);
7000 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
7001 if (dwarf2_per_objfile
->using_index
)
7003 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
7004 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
7007 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
7008 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
7009 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
7010 gdb_assert (sig_entry
->type_unit_group
== NULL
);
7011 gdb_assert (sig_entry
->dwo_unit
== NULL
);
7013 sig_entry
->per_cu
.section
= dwo_entry
->section
;
7014 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
7015 sig_entry
->per_cu
.length
= dwo_entry
->length
;
7016 sig_entry
->per_cu
.reading_dwo_directly
= 1;
7017 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
7018 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
7019 sig_entry
->dwo_unit
= dwo_entry
;
7022 /* Subroutine of lookup_signatured_type.
7023 If we haven't read the TU yet, create the signatured_type data structure
7024 for a TU to be read in directly from a DWO file, bypassing the stub.
7025 This is the "Stay in DWO Optimization": When there is no DWP file and we're
7026 using .gdb_index, then when reading a CU we want to stay in the DWO file
7027 containing that CU. Otherwise we could end up reading several other DWO
7028 files (due to comdat folding) to process the transitive closure of all the
7029 mentioned TUs, and that can be slow. The current DWO file will have every
7030 type signature that it needs.
7031 We only do this for .gdb_index because in the psymtab case we already have
7032 to read all the DWOs to build the type unit groups. */
7034 static struct signatured_type
*
7035 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7037 struct dwarf2_per_objfile
*dwarf2_per_objfile
7038 = cu
->per_cu
->dwarf2_per_objfile
;
7039 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7040 struct dwo_file
*dwo_file
;
7041 struct dwo_unit find_dwo_entry
, *dwo_entry
;
7042 struct signatured_type find_sig_entry
, *sig_entry
;
7045 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7047 /* If TU skeletons have been removed then we may not have read in any
7049 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7051 dwarf2_per_objfile
->signatured_types
7052 = allocate_signatured_type_table (objfile
);
7055 /* We only ever need to read in one copy of a signatured type.
7056 Use the global signatured_types array to do our own comdat-folding
7057 of types. If this is the first time we're reading this TU, and
7058 the TU has an entry in .gdb_index, replace the recorded data from
7059 .gdb_index with this TU. */
7061 find_sig_entry
.signature
= sig
;
7062 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7063 &find_sig_entry
, INSERT
);
7064 sig_entry
= (struct signatured_type
*) *slot
;
7066 /* We can get here with the TU already read, *or* in the process of being
7067 read. Don't reassign the global entry to point to this DWO if that's
7068 the case. Also note that if the TU is already being read, it may not
7069 have come from a DWO, the program may be a mix of Fission-compiled
7070 code and non-Fission-compiled code. */
7072 /* Have we already tried to read this TU?
7073 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7074 needn't exist in the global table yet). */
7075 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
7078 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7079 dwo_unit of the TU itself. */
7080 dwo_file
= cu
->dwo_unit
->dwo_file
;
7082 /* Ok, this is the first time we're reading this TU. */
7083 if (dwo_file
->tus
== NULL
)
7085 find_dwo_entry
.signature
= sig
;
7086 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7087 if (dwo_entry
== NULL
)
7090 /* If the global table doesn't have an entry for this TU, add one. */
7091 if (sig_entry
== NULL
)
7092 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7094 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7095 sig_entry
->per_cu
.tu_read
= 1;
7099 /* Subroutine of lookup_signatured_type.
7100 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7101 then try the DWP file. If the TU stub (skeleton) has been removed then
7102 it won't be in .gdb_index. */
7104 static struct signatured_type
*
7105 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7107 struct dwarf2_per_objfile
*dwarf2_per_objfile
7108 = cu
->per_cu
->dwarf2_per_objfile
;
7109 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7110 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7111 struct dwo_unit
*dwo_entry
;
7112 struct signatured_type find_sig_entry
, *sig_entry
;
7115 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7116 gdb_assert (dwp_file
!= NULL
);
7118 /* If TU skeletons have been removed then we may not have read in any
7120 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7122 dwarf2_per_objfile
->signatured_types
7123 = allocate_signatured_type_table (objfile
);
7126 find_sig_entry
.signature
= sig
;
7127 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7128 &find_sig_entry
, INSERT
);
7129 sig_entry
= (struct signatured_type
*) *slot
;
7131 /* Have we already tried to read this TU?
7132 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7133 needn't exist in the global table yet). */
7134 if (sig_entry
!= NULL
)
7137 if (dwp_file
->tus
== NULL
)
7139 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7140 sig
, 1 /* is_debug_types */);
7141 if (dwo_entry
== NULL
)
7144 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7145 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7150 /* Lookup a signature based type for DW_FORM_ref_sig8.
7151 Returns NULL if signature SIG is not present in the table.
7152 It is up to the caller to complain about this. */
7154 static struct signatured_type
*
7155 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7157 struct dwarf2_per_objfile
*dwarf2_per_objfile
7158 = cu
->per_cu
->dwarf2_per_objfile
;
7161 && dwarf2_per_objfile
->using_index
)
7163 /* We're in a DWO/DWP file, and we're using .gdb_index.
7164 These cases require special processing. */
7165 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7166 return lookup_dwo_signatured_type (cu
, sig
);
7168 return lookup_dwp_signatured_type (cu
, sig
);
7172 struct signatured_type find_entry
, *entry
;
7174 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7176 find_entry
.signature
= sig
;
7177 entry
= ((struct signatured_type
*)
7178 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7183 /* Low level DIE reading support. */
7185 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7188 init_cu_die_reader (struct die_reader_specs
*reader
,
7189 struct dwarf2_cu
*cu
,
7190 struct dwarf2_section_info
*section
,
7191 struct dwo_file
*dwo_file
,
7192 struct abbrev_table
*abbrev_table
)
7194 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7195 reader
->abfd
= get_section_bfd_owner (section
);
7197 reader
->dwo_file
= dwo_file
;
7198 reader
->die_section
= section
;
7199 reader
->buffer
= section
->buffer
;
7200 reader
->buffer_end
= section
->buffer
+ section
->size
;
7201 reader
->comp_dir
= NULL
;
7202 reader
->abbrev_table
= abbrev_table
;
7205 /* Subroutine of init_cutu_and_read_dies to simplify it.
7206 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7207 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7210 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7211 from it to the DIE in the DWO. If NULL we are skipping the stub.
7212 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7213 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7214 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7215 STUB_COMP_DIR may be non-NULL.
7216 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7217 are filled in with the info of the DIE from the DWO file.
7218 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7219 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7220 kept around for at least as long as *RESULT_READER.
7222 The result is non-zero if a valid (non-dummy) DIE was found. */
7225 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7226 struct dwo_unit
*dwo_unit
,
7227 struct die_info
*stub_comp_unit_die
,
7228 const char *stub_comp_dir
,
7229 struct die_reader_specs
*result_reader
,
7230 const gdb_byte
**result_info_ptr
,
7231 struct die_info
**result_comp_unit_die
,
7232 int *result_has_children
,
7233 abbrev_table_up
*result_dwo_abbrev_table
)
7235 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7236 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7237 struct dwarf2_cu
*cu
= this_cu
->cu
;
7239 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7240 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7241 int i
,num_extra_attrs
;
7242 struct dwarf2_section_info
*dwo_abbrev_section
;
7243 struct attribute
*attr
;
7244 struct die_info
*comp_unit_die
;
7246 /* At most one of these may be provided. */
7247 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7249 /* These attributes aren't processed until later:
7250 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7251 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7252 referenced later. However, these attributes are found in the stub
7253 which we won't have later. In order to not impose this complication
7254 on the rest of the code, we read them here and copy them to the
7263 if (stub_comp_unit_die
!= NULL
)
7265 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7267 if (! this_cu
->is_debug_types
)
7268 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7269 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7270 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7271 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7272 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7274 /* There should be a DW_AT_addr_base attribute here (if needed).
7275 We need the value before we can process DW_FORM_GNU_addr_index
7276 or DW_FORM_addrx. */
7278 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7279 if (attr
!= nullptr)
7280 cu
->addr_base
= DW_UNSND (attr
);
7282 /* There should be a DW_AT_ranges_base attribute here (if needed).
7283 We need the value before we can process DW_AT_ranges. */
7284 cu
->ranges_base
= 0;
7285 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7286 if (attr
!= nullptr)
7287 cu
->ranges_base
= DW_UNSND (attr
);
7289 else if (stub_comp_dir
!= NULL
)
7291 /* Reconstruct the comp_dir attribute to simplify the code below. */
7292 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7293 comp_dir
->name
= DW_AT_comp_dir
;
7294 comp_dir
->form
= DW_FORM_string
;
7295 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7296 DW_STRING (comp_dir
) = stub_comp_dir
;
7299 /* Set up for reading the DWO CU/TU. */
7300 cu
->dwo_unit
= dwo_unit
;
7301 dwarf2_section_info
*section
= dwo_unit
->section
;
7302 dwarf2_read_section (objfile
, section
);
7303 abfd
= get_section_bfd_owner (section
);
7304 begin_info_ptr
= info_ptr
= (section
->buffer
7305 + to_underlying (dwo_unit
->sect_off
));
7306 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7308 if (this_cu
->is_debug_types
)
7310 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7312 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7313 &cu
->header
, section
,
7315 info_ptr
, rcuh_kind::TYPE
);
7316 /* This is not an assert because it can be caused by bad debug info. */
7317 if (sig_type
->signature
!= cu
->header
.signature
)
7319 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7320 " TU at offset %s [in module %s]"),
7321 hex_string (sig_type
->signature
),
7322 hex_string (cu
->header
.signature
),
7323 sect_offset_str (dwo_unit
->sect_off
),
7324 bfd_get_filename (abfd
));
7326 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7327 /* For DWOs coming from DWP files, we don't know the CU length
7328 nor the type's offset in the TU until now. */
7329 dwo_unit
->length
= get_cu_length (&cu
->header
);
7330 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7332 /* Establish the type offset that can be used to lookup the type.
7333 For DWO files, we don't know it until now. */
7334 sig_type
->type_offset_in_section
7335 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7339 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7340 &cu
->header
, section
,
7342 info_ptr
, rcuh_kind::COMPILE
);
7343 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7344 /* For DWOs coming from DWP files, we don't know the CU length
7346 dwo_unit
->length
= get_cu_length (&cu
->header
);
7349 *result_dwo_abbrev_table
7350 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7351 cu
->header
.abbrev_sect_off
);
7352 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7353 result_dwo_abbrev_table
->get ());
7355 /* Read in the die, but leave space to copy over the attributes
7356 from the stub. This has the benefit of simplifying the rest of
7357 the code - all the work to maintain the illusion of a single
7358 DW_TAG_{compile,type}_unit DIE is done here. */
7359 num_extra_attrs
= ((stmt_list
!= NULL
)
7363 + (comp_dir
!= NULL
));
7364 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7365 result_has_children
, num_extra_attrs
);
7367 /* Copy over the attributes from the stub to the DIE we just read in. */
7368 comp_unit_die
= *result_comp_unit_die
;
7369 i
= comp_unit_die
->num_attrs
;
7370 if (stmt_list
!= NULL
)
7371 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7373 comp_unit_die
->attrs
[i
++] = *low_pc
;
7374 if (high_pc
!= NULL
)
7375 comp_unit_die
->attrs
[i
++] = *high_pc
;
7377 comp_unit_die
->attrs
[i
++] = *ranges
;
7378 if (comp_dir
!= NULL
)
7379 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7380 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7382 if (dwarf_die_debug
)
7384 fprintf_unfiltered (gdb_stdlog
,
7385 "Read die from %s@0x%x of %s:\n",
7386 get_section_name (section
),
7387 (unsigned) (begin_info_ptr
- section
->buffer
),
7388 bfd_get_filename (abfd
));
7389 dump_die (comp_unit_die
, dwarf_die_debug
);
7392 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7393 TUs by skipping the stub and going directly to the entry in the DWO file.
7394 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7395 to get it via circuitous means. Blech. */
7396 if (comp_dir
!= NULL
)
7397 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7399 /* Skip dummy compilation units. */
7400 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7401 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7404 *result_info_ptr
= info_ptr
;
7408 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
7409 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
7410 signature is part of the header. */
7411 static gdb::optional
<ULONGEST
>
7412 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
7414 if (cu
->header
.version
>= 5)
7415 return cu
->header
.signature
;
7416 struct attribute
*attr
;
7417 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7418 if (attr
== nullptr)
7419 return gdb::optional
<ULONGEST
> ();
7420 return DW_UNSND (attr
);
7423 /* Subroutine of init_cutu_and_read_dies to simplify it.
7424 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7425 Returns NULL if the specified DWO unit cannot be found. */
7427 static struct dwo_unit
*
7428 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7429 struct die_info
*comp_unit_die
)
7431 struct dwarf2_cu
*cu
= this_cu
->cu
;
7432 struct dwo_unit
*dwo_unit
;
7433 const char *comp_dir
, *dwo_name
;
7435 gdb_assert (cu
!= NULL
);
7437 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7438 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7439 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7441 if (this_cu
->is_debug_types
)
7443 struct signatured_type
*sig_type
;
7445 /* Since this_cu is the first member of struct signatured_type,
7446 we can go from a pointer to one to a pointer to the other. */
7447 sig_type
= (struct signatured_type
*) this_cu
;
7448 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7452 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7453 if (!signature
.has_value ())
7454 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7456 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7457 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7464 /* Subroutine of init_cutu_and_read_dies to simplify it.
7465 See it for a description of the parameters.
7466 Read a TU directly from a DWO file, bypassing the stub. */
7469 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7470 int use_existing_cu
, int keep
,
7471 die_reader_func_ftype
*die_reader_func
,
7474 std::unique_ptr
<dwarf2_cu
> new_cu
;
7475 struct signatured_type
*sig_type
;
7476 struct die_reader_specs reader
;
7477 const gdb_byte
*info_ptr
;
7478 struct die_info
*comp_unit_die
;
7480 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7482 /* Verify we can do the following downcast, and that we have the
7484 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7485 sig_type
= (struct signatured_type
*) this_cu
;
7486 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7488 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7490 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7491 /* There's no need to do the rereading_dwo_cu handling that
7492 init_cutu_and_read_dies does since we don't read the stub. */
7496 /* If !use_existing_cu, this_cu->cu must be NULL. */
7497 gdb_assert (this_cu
->cu
== NULL
);
7498 new_cu
.reset (new dwarf2_cu (this_cu
));
7501 /* A future optimization, if needed, would be to use an existing
7502 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7503 could share abbrev tables. */
7505 /* The abbreviation table used by READER, this must live at least as long as
7507 abbrev_table_up dwo_abbrev_table
;
7509 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7510 NULL
/* stub_comp_unit_die */,
7511 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7513 &comp_unit_die
, &has_children
,
7514 &dwo_abbrev_table
) == 0)
7520 /* All the "real" work is done here. */
7521 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7523 /* This duplicates the code in init_cutu_and_read_dies,
7524 but the alternative is making the latter more complex.
7525 This function is only for the special case of using DWO files directly:
7526 no point in overly complicating the general case just to handle this. */
7527 if (new_cu
!= NULL
&& keep
)
7529 /* Link this CU into read_in_chain. */
7530 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7531 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7532 /* The chain owns it now. */
7537 /* Initialize a CU (or TU) and read its DIEs.
7538 If the CU defers to a DWO file, read the DWO file as well.
7540 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7541 Otherwise the table specified in the comp unit header is read in and used.
7542 This is an optimization for when we already have the abbrev table.
7544 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7545 Otherwise, a new CU is allocated with xmalloc.
7547 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7548 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7550 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7551 linker) then DIE_READER_FUNC will not get called. */
7554 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7555 struct abbrev_table
*abbrev_table
,
7556 int use_existing_cu
, int keep
,
7558 die_reader_func_ftype
*die_reader_func
,
7561 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7562 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7563 struct dwarf2_section_info
*section
= this_cu
->section
;
7564 bfd
*abfd
= get_section_bfd_owner (section
);
7565 struct dwarf2_cu
*cu
;
7566 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7567 struct die_reader_specs reader
;
7568 struct die_info
*comp_unit_die
;
7570 struct signatured_type
*sig_type
= NULL
;
7571 struct dwarf2_section_info
*abbrev_section
;
7572 /* Non-zero if CU currently points to a DWO file and we need to
7573 reread it. When this happens we need to reread the skeleton die
7574 before we can reread the DWO file (this only applies to CUs, not TUs). */
7575 int rereading_dwo_cu
= 0;
7577 if (dwarf_die_debug
)
7578 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7579 this_cu
->is_debug_types
? "type" : "comp",
7580 sect_offset_str (this_cu
->sect_off
));
7582 if (use_existing_cu
)
7585 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7586 file (instead of going through the stub), short-circuit all of this. */
7587 if (this_cu
->reading_dwo_directly
)
7589 /* Narrow down the scope of possibilities to have to understand. */
7590 gdb_assert (this_cu
->is_debug_types
);
7591 gdb_assert (abbrev_table
== NULL
);
7592 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7593 die_reader_func
, data
);
7597 /* This is cheap if the section is already read in. */
7598 dwarf2_read_section (objfile
, section
);
7600 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7602 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7604 std::unique_ptr
<dwarf2_cu
> new_cu
;
7605 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7608 /* If this CU is from a DWO file we need to start over, we need to
7609 refetch the attributes from the skeleton CU.
7610 This could be optimized by retrieving those attributes from when we
7611 were here the first time: the previous comp_unit_die was stored in
7612 comp_unit_obstack. But there's no data yet that we need this
7614 if (cu
->dwo_unit
!= NULL
)
7615 rereading_dwo_cu
= 1;
7619 /* If !use_existing_cu, this_cu->cu must be NULL. */
7620 gdb_assert (this_cu
->cu
== NULL
);
7621 new_cu
.reset (new dwarf2_cu (this_cu
));
7625 /* Get the header. */
7626 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7628 /* We already have the header, there's no need to read it in again. */
7629 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7633 if (this_cu
->is_debug_types
)
7635 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7636 &cu
->header
, section
,
7637 abbrev_section
, info_ptr
,
7640 /* Since per_cu is the first member of struct signatured_type,
7641 we can go from a pointer to one to a pointer to the other. */
7642 sig_type
= (struct signatured_type
*) this_cu
;
7643 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7644 gdb_assert (sig_type
->type_offset_in_tu
7645 == cu
->header
.type_cu_offset_in_tu
);
7646 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7648 /* LENGTH has not been set yet for type units if we're
7649 using .gdb_index. */
7650 this_cu
->length
= get_cu_length (&cu
->header
);
7652 /* Establish the type offset that can be used to lookup the type. */
7653 sig_type
->type_offset_in_section
=
7654 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7656 this_cu
->dwarf_version
= cu
->header
.version
;
7660 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7661 &cu
->header
, section
,
7664 rcuh_kind::COMPILE
);
7666 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7667 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7668 this_cu
->dwarf_version
= cu
->header
.version
;
7672 /* Skip dummy compilation units. */
7673 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7674 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7677 /* If we don't have them yet, read the abbrevs for this compilation unit.
7678 And if we need to read them now, make sure they're freed when we're
7679 done (own the table through ABBREV_TABLE_HOLDER). */
7680 abbrev_table_up abbrev_table_holder
;
7681 if (abbrev_table
!= NULL
)
7682 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7686 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7687 cu
->header
.abbrev_sect_off
);
7688 abbrev_table
= abbrev_table_holder
.get ();
7691 /* Read the top level CU/TU die. */
7692 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7693 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7695 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7698 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7699 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7700 table from the DWO file and pass the ownership over to us. It will be
7701 referenced from READER, so we must make sure to free it after we're done
7704 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7705 DWO CU, that this test will fail (the attribute will not be present). */
7706 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7707 abbrev_table_up dwo_abbrev_table
;
7708 if (dwo_name
!= nullptr)
7710 struct dwo_unit
*dwo_unit
;
7711 struct die_info
*dwo_comp_unit_die
;
7715 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7716 " has children (offset %s) [in module %s]"),
7717 sect_offset_str (this_cu
->sect_off
),
7718 bfd_get_filename (abfd
));
7720 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7721 if (dwo_unit
!= NULL
)
7723 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7724 comp_unit_die
, NULL
,
7726 &dwo_comp_unit_die
, &has_children
,
7727 &dwo_abbrev_table
) == 0)
7732 comp_unit_die
= dwo_comp_unit_die
;
7736 /* Yikes, we couldn't find the rest of the DIE, we only have
7737 the stub. A complaint has already been logged. There's
7738 not much more we can do except pass on the stub DIE to
7739 die_reader_func. We don't want to throw an error on bad
7744 /* All of the above is setup for this call. Yikes. */
7745 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7747 /* Done, clean up. */
7748 if (new_cu
!= NULL
&& keep
)
7750 /* Link this CU into read_in_chain. */
7751 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7752 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7753 /* The chain owns it now. */
7758 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7759 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7760 to have already done the lookup to find the DWO file).
7762 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7763 THIS_CU->is_debug_types, but nothing else.
7765 We fill in THIS_CU->length.
7767 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7768 linker) then DIE_READER_FUNC will not get called.
7770 THIS_CU->cu is always freed when done.
7771 This is done in order to not leave THIS_CU->cu in a state where we have
7772 to care whether it refers to the "main" CU or the DWO CU. */
7775 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7776 struct dwo_file
*dwo_file
,
7777 die_reader_func_ftype
*die_reader_func
,
7780 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7781 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7782 struct dwarf2_section_info
*section
= this_cu
->section
;
7783 bfd
*abfd
= get_section_bfd_owner (section
);
7784 struct dwarf2_section_info
*abbrev_section
;
7785 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7786 struct die_reader_specs reader
;
7787 struct die_info
*comp_unit_die
;
7790 if (dwarf_die_debug
)
7791 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7792 this_cu
->is_debug_types
? "type" : "comp",
7793 sect_offset_str (this_cu
->sect_off
));
7795 gdb_assert (this_cu
->cu
== NULL
);
7797 abbrev_section
= (dwo_file
!= NULL
7798 ? &dwo_file
->sections
.abbrev
7799 : get_abbrev_section_for_cu (this_cu
));
7801 /* This is cheap if the section is already read in. */
7802 dwarf2_read_section (objfile
, section
);
7804 struct dwarf2_cu
cu (this_cu
);
7806 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7807 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7808 &cu
.header
, section
,
7809 abbrev_section
, info_ptr
,
7810 (this_cu
->is_debug_types
7812 : rcuh_kind::COMPILE
));
7814 this_cu
->length
= get_cu_length (&cu
.header
);
7816 /* Skip dummy compilation units. */
7817 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7818 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7821 abbrev_table_up abbrev_table
7822 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7823 cu
.header
.abbrev_sect_off
);
7825 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7826 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7828 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7831 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7832 does not lookup the specified DWO file.
7833 This cannot be used to read DWO files.
7835 THIS_CU->cu is always freed when done.
7836 This is done in order to not leave THIS_CU->cu in a state where we have
7837 to care whether it refers to the "main" CU or the DWO CU.
7838 We can revisit this if the data shows there's a performance issue. */
7841 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7842 die_reader_func_ftype
*die_reader_func
,
7845 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7848 /* Type Unit Groups.
7850 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7851 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7852 so that all types coming from the same compilation (.o file) are grouped
7853 together. A future step could be to put the types in the same symtab as
7854 the CU the types ultimately came from. */
7857 hash_type_unit_group (const void *item
)
7859 const struct type_unit_group
*tu_group
7860 = (const struct type_unit_group
*) item
;
7862 return hash_stmt_list_entry (&tu_group
->hash
);
7866 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7868 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7869 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7871 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7874 /* Allocate a hash table for type unit groups. */
7877 allocate_type_unit_groups_table (struct objfile
*objfile
)
7879 return htab_create_alloc_ex (3,
7880 hash_type_unit_group
,
7883 &objfile
->objfile_obstack
,
7884 hashtab_obstack_allocate
,
7885 dummy_obstack_deallocate
);
7888 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7889 partial symtabs. We combine several TUs per psymtab to not let the size
7890 of any one psymtab grow too big. */
7891 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7892 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7894 /* Helper routine for get_type_unit_group.
7895 Create the type_unit_group object used to hold one or more TUs. */
7897 static struct type_unit_group
*
7898 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7900 struct dwarf2_per_objfile
*dwarf2_per_objfile
7901 = cu
->per_cu
->dwarf2_per_objfile
;
7902 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7903 struct dwarf2_per_cu_data
*per_cu
;
7904 struct type_unit_group
*tu_group
;
7906 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7907 struct type_unit_group
);
7908 per_cu
= &tu_group
->per_cu
;
7909 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7911 if (dwarf2_per_objfile
->using_index
)
7913 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7914 struct dwarf2_per_cu_quick_data
);
7918 unsigned int line_offset
= to_underlying (line_offset_struct
);
7919 struct partial_symtab
*pst
;
7922 /* Give the symtab a useful name for debug purposes. */
7923 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7924 name
= string_printf ("<type_units_%d>",
7925 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7927 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7929 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7933 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7934 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7939 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7940 STMT_LIST is a DW_AT_stmt_list attribute. */
7942 static struct type_unit_group
*
7943 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7945 struct dwarf2_per_objfile
*dwarf2_per_objfile
7946 = cu
->per_cu
->dwarf2_per_objfile
;
7947 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7948 struct type_unit_group
*tu_group
;
7950 unsigned int line_offset
;
7951 struct type_unit_group type_unit_group_for_lookup
;
7953 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7955 dwarf2_per_objfile
->type_unit_groups
=
7956 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7959 /* Do we need to create a new group, or can we use an existing one? */
7963 line_offset
= DW_UNSND (stmt_list
);
7964 ++tu_stats
->nr_symtab_sharers
;
7968 /* Ugh, no stmt_list. Rare, but we have to handle it.
7969 We can do various things here like create one group per TU or
7970 spread them over multiple groups to split up the expansion work.
7971 To avoid worst case scenarios (too many groups or too large groups)
7972 we, umm, group them in bunches. */
7973 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7974 | (tu_stats
->nr_stmt_less_type_units
7975 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7976 ++tu_stats
->nr_stmt_less_type_units
;
7979 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7980 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7981 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7982 &type_unit_group_for_lookup
, INSERT
);
7985 tu_group
= (struct type_unit_group
*) *slot
;
7986 gdb_assert (tu_group
!= NULL
);
7990 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7991 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7993 ++tu_stats
->nr_symtabs
;
7999 /* Partial symbol tables. */
8001 /* Create a psymtab named NAME and assign it to PER_CU.
8003 The caller must fill in the following details:
8004 dirname, textlow, texthigh. */
8006 static struct partial_symtab
*
8007 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
8009 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
8010 struct partial_symtab
*pst
;
8012 pst
= start_psymtab_common (objfile
, name
, 0);
8014 pst
->psymtabs_addrmap_supported
= 1;
8016 /* This is the glue that links PST into GDB's symbol API. */
8017 pst
->read_symtab_private
= per_cu
;
8018 pst
->read_symtab
= dwarf2_read_symtab
;
8019 per_cu
->v
.psymtab
= pst
;
8024 /* The DATA object passed to process_psymtab_comp_unit_reader has this
8027 struct process_psymtab_comp_unit_data
8029 /* True if we are reading a DW_TAG_partial_unit. */
8031 int want_partial_unit
;
8033 /* The "pretend" language that is used if the CU doesn't declare a
8036 enum language pretend_language
;
8039 /* die_reader_func for process_psymtab_comp_unit. */
8042 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
8043 const gdb_byte
*info_ptr
,
8044 struct die_info
*comp_unit_die
,
8048 struct dwarf2_cu
*cu
= reader
->cu
;
8049 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8050 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8051 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8053 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
8054 struct partial_symtab
*pst
;
8055 enum pc_bounds_kind cu_bounds_kind
;
8056 const char *filename
;
8057 struct process_psymtab_comp_unit_data
*info
8058 = (struct process_psymtab_comp_unit_data
*) data
;
8060 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
8063 gdb_assert (! per_cu
->is_debug_types
);
8065 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
8067 /* Allocate a new partial symbol table structure. */
8068 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
8069 if (filename
== NULL
)
8072 pst
= create_partial_symtab (per_cu
, filename
);
8074 /* This must be done before calling dwarf2_build_include_psymtabs. */
8075 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
8077 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8079 dwarf2_find_base_address (comp_unit_die
, cu
);
8081 /* Possibly set the default values of LOWPC and HIGHPC from
8083 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
8084 &best_highpc
, cu
, pst
);
8085 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8088 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
8091 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
8093 /* Store the contiguous range if it is not empty; it can be
8094 empty for CUs with no code. */
8095 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8099 /* Check if comp unit has_children.
8100 If so, read the rest of the partial symbols from this comp unit.
8101 If not, there's no more debug_info for this comp unit. */
8104 struct partial_die_info
*first_die
;
8105 CORE_ADDR lowpc
, highpc
;
8107 lowpc
= ((CORE_ADDR
) -1);
8108 highpc
= ((CORE_ADDR
) 0);
8110 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8112 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8113 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8115 /* If we didn't find a lowpc, set it to highpc to avoid
8116 complaints from `maint check'. */
8117 if (lowpc
== ((CORE_ADDR
) -1))
8120 /* If the compilation unit didn't have an explicit address range,
8121 then use the information extracted from its child dies. */
8122 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8125 best_highpc
= highpc
;
8128 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
8129 best_lowpc
+ baseaddr
)
8131 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
8132 best_highpc
+ baseaddr
)
8135 end_psymtab_common (objfile
, pst
);
8137 if (!cu
->per_cu
->imported_symtabs_empty ())
8140 int len
= cu
->per_cu
->imported_symtabs_size ();
8142 /* Fill in 'dependencies' here; we fill in 'users' in a
8144 pst
->number_of_dependencies
= len
;
8146 = objfile
->partial_symtabs
->allocate_dependencies (len
);
8147 for (i
= 0; i
< len
; ++i
)
8149 pst
->dependencies
[i
]
8150 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
8153 cu
->per_cu
->imported_symtabs_free ();
8156 /* Get the list of files included in the current compilation unit,
8157 and build a psymtab for each of them. */
8158 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8160 if (dwarf_read_debug
)
8161 fprintf_unfiltered (gdb_stdlog
,
8162 "Psymtab for %s unit @%s: %s - %s"
8163 ", %d global, %d static syms\n",
8164 per_cu
->is_debug_types
? "type" : "comp",
8165 sect_offset_str (per_cu
->sect_off
),
8166 paddress (gdbarch
, pst
->text_low (objfile
)),
8167 paddress (gdbarch
, pst
->text_high (objfile
)),
8168 pst
->n_global_syms
, pst
->n_static_syms
);
8171 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8172 Process compilation unit THIS_CU for a psymtab. */
8175 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8176 int want_partial_unit
,
8177 enum language pretend_language
)
8179 /* If this compilation unit was already read in, free the
8180 cached copy in order to read it in again. This is
8181 necessary because we skipped some symbols when we first
8182 read in the compilation unit (see load_partial_dies).
8183 This problem could be avoided, but the benefit is unclear. */
8184 if (this_cu
->cu
!= NULL
)
8185 free_one_cached_comp_unit (this_cu
);
8187 if (this_cu
->is_debug_types
)
8188 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8189 build_type_psymtabs_reader
, NULL
);
8192 process_psymtab_comp_unit_data info
;
8193 info
.want_partial_unit
= want_partial_unit
;
8194 info
.pretend_language
= pretend_language
;
8195 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8196 process_psymtab_comp_unit_reader
, &info
);
8199 /* Age out any secondary CUs. */
8200 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8203 /* Reader function for build_type_psymtabs. */
8206 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8207 const gdb_byte
*info_ptr
,
8208 struct die_info
*type_unit_die
,
8212 struct dwarf2_per_objfile
*dwarf2_per_objfile
8213 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8214 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8215 struct dwarf2_cu
*cu
= reader
->cu
;
8216 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8217 struct signatured_type
*sig_type
;
8218 struct type_unit_group
*tu_group
;
8219 struct attribute
*attr
;
8220 struct partial_die_info
*first_die
;
8221 CORE_ADDR lowpc
, highpc
;
8222 struct partial_symtab
*pst
;
8224 gdb_assert (data
== NULL
);
8225 gdb_assert (per_cu
->is_debug_types
);
8226 sig_type
= (struct signatured_type
*) per_cu
;
8231 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8232 tu_group
= get_type_unit_group (cu
, attr
);
8234 if (tu_group
->tus
== nullptr)
8235 tu_group
->tus
= new std::vector
<signatured_type
*>;
8236 tu_group
->tus
->push_back (sig_type
);
8238 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8239 pst
= create_partial_symtab (per_cu
, "");
8242 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8244 lowpc
= (CORE_ADDR
) -1;
8245 highpc
= (CORE_ADDR
) 0;
8246 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8248 end_psymtab_common (objfile
, pst
);
8251 /* Struct used to sort TUs by their abbreviation table offset. */
8253 struct tu_abbrev_offset
8255 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8256 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8259 signatured_type
*sig_type
;
8260 sect_offset abbrev_offset
;
8263 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8266 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8267 const struct tu_abbrev_offset
&b
)
8269 return a
.abbrev_offset
< b
.abbrev_offset
;
8272 /* Efficiently read all the type units.
8273 This does the bulk of the work for build_type_psymtabs.
8275 The efficiency is because we sort TUs by the abbrev table they use and
8276 only read each abbrev table once. In one program there are 200K TUs
8277 sharing 8K abbrev tables.
8279 The main purpose of this function is to support building the
8280 dwarf2_per_objfile->type_unit_groups table.
8281 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8282 can collapse the search space by grouping them by stmt_list.
8283 The savings can be significant, in the same program from above the 200K TUs
8284 share 8K stmt_list tables.
8286 FUNC is expected to call get_type_unit_group, which will create the
8287 struct type_unit_group if necessary and add it to
8288 dwarf2_per_objfile->type_unit_groups. */
8291 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8293 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8294 abbrev_table_up abbrev_table
;
8295 sect_offset abbrev_offset
;
8297 /* It's up to the caller to not call us multiple times. */
8298 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8300 if (dwarf2_per_objfile
->all_type_units
.empty ())
8303 /* TUs typically share abbrev tables, and there can be way more TUs than
8304 abbrev tables. Sort by abbrev table to reduce the number of times we
8305 read each abbrev table in.
8306 Alternatives are to punt or to maintain a cache of abbrev tables.
8307 This is simpler and efficient enough for now.
8309 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8310 symtab to use). Typically TUs with the same abbrev offset have the same
8311 stmt_list value too so in practice this should work well.
8313 The basic algorithm here is:
8315 sort TUs by abbrev table
8316 for each TU with same abbrev table:
8317 read abbrev table if first user
8318 read TU top level DIE
8319 [IWBN if DWO skeletons had DW_AT_stmt_list]
8322 if (dwarf_read_debug
)
8323 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8325 /* Sort in a separate table to maintain the order of all_type_units
8326 for .gdb_index: TU indices directly index all_type_units. */
8327 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8328 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8330 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8331 sorted_by_abbrev
.emplace_back
8332 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8333 sig_type
->per_cu
.section
,
8334 sig_type
->per_cu
.sect_off
));
8336 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8337 sort_tu_by_abbrev_offset
);
8339 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8341 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8343 /* Switch to the next abbrev table if necessary. */
8344 if (abbrev_table
== NULL
8345 || tu
.abbrev_offset
!= abbrev_offset
)
8347 abbrev_offset
= tu
.abbrev_offset
;
8349 abbrev_table_read_table (dwarf2_per_objfile
,
8350 &dwarf2_per_objfile
->abbrev
,
8352 ++tu_stats
->nr_uniq_abbrev_tables
;
8355 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8356 0, 0, false, build_type_psymtabs_reader
, NULL
);
8360 /* Print collected type unit statistics. */
8363 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8365 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8367 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8368 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8369 dwarf2_per_objfile
->all_type_units
.size ());
8370 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8371 tu_stats
->nr_uniq_abbrev_tables
);
8372 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8373 tu_stats
->nr_symtabs
);
8374 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8375 tu_stats
->nr_symtab_sharers
);
8376 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8377 tu_stats
->nr_stmt_less_type_units
);
8378 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8379 tu_stats
->nr_all_type_units_reallocs
);
8382 /* Traversal function for build_type_psymtabs. */
8385 build_type_psymtab_dependencies (void **slot
, void *info
)
8387 struct dwarf2_per_objfile
*dwarf2_per_objfile
8388 = (struct dwarf2_per_objfile
*) info
;
8389 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8390 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8391 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8392 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8393 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
8396 gdb_assert (len
> 0);
8397 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8399 pst
->number_of_dependencies
= len
;
8400 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8401 for (i
= 0; i
< len
; ++i
)
8403 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
8404 gdb_assert (iter
->per_cu
.is_debug_types
);
8405 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8406 iter
->type_unit_group
= tu_group
;
8409 delete tu_group
->tus
;
8410 tu_group
->tus
= nullptr;
8415 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8416 Build partial symbol tables for the .debug_types comp-units. */
8419 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8421 if (! create_all_type_units (dwarf2_per_objfile
))
8424 build_type_psymtabs_1 (dwarf2_per_objfile
);
8427 /* Traversal function for process_skeletonless_type_unit.
8428 Read a TU in a DWO file and build partial symbols for it. */
8431 process_skeletonless_type_unit (void **slot
, void *info
)
8433 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8434 struct dwarf2_per_objfile
*dwarf2_per_objfile
8435 = (struct dwarf2_per_objfile
*) info
;
8436 struct signatured_type find_entry
, *entry
;
8438 /* If this TU doesn't exist in the global table, add it and read it in. */
8440 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8442 dwarf2_per_objfile
->signatured_types
8443 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8446 find_entry
.signature
= dwo_unit
->signature
;
8447 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8449 /* If we've already seen this type there's nothing to do. What's happening
8450 is we're doing our own version of comdat-folding here. */
8454 /* This does the job that create_all_type_units would have done for
8456 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8457 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8460 /* This does the job that build_type_psymtabs_1 would have done. */
8461 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8462 build_type_psymtabs_reader
, NULL
);
8467 /* Traversal function for process_skeletonless_type_units. */
8470 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8472 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8474 if (dwo_file
->tus
!= NULL
)
8476 htab_traverse_noresize (dwo_file
->tus
,
8477 process_skeletonless_type_unit
, info
);
8483 /* Scan all TUs of DWO files, verifying we've processed them.
8484 This is needed in case a TU was emitted without its skeleton.
8485 Note: This can't be done until we know what all the DWO files are. */
8488 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8490 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8491 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8492 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8494 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
8495 process_dwo_file_for_skeletonless_type_units
,
8496 dwarf2_per_objfile
);
8500 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8503 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8505 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8507 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8512 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8514 /* Set the 'user' field only if it is not already set. */
8515 if (pst
->dependencies
[j
]->user
== NULL
)
8516 pst
->dependencies
[j
]->user
= pst
;
8521 /* Build the partial symbol table by doing a quick pass through the
8522 .debug_info and .debug_abbrev sections. */
8525 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8527 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8529 if (dwarf_read_debug
)
8531 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8532 objfile_name (objfile
));
8535 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8537 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8539 /* Any cached compilation units will be linked by the per-objfile
8540 read_in_chain. Make sure to free them when we're done. */
8541 free_cached_comp_units
freer (dwarf2_per_objfile
);
8543 build_type_psymtabs (dwarf2_per_objfile
);
8545 create_all_comp_units (dwarf2_per_objfile
);
8547 /* Create a temporary address map on a temporary obstack. We later
8548 copy this to the final obstack. */
8549 auto_obstack temp_obstack
;
8551 scoped_restore save_psymtabs_addrmap
8552 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8553 addrmap_create_mutable (&temp_obstack
));
8555 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8556 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8558 /* This has to wait until we read the CUs, we need the list of DWOs. */
8559 process_skeletonless_type_units (dwarf2_per_objfile
);
8561 /* Now that all TUs have been processed we can fill in the dependencies. */
8562 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8564 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8565 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8568 if (dwarf_read_debug
)
8569 print_tu_stats (dwarf2_per_objfile
);
8571 set_partial_user (dwarf2_per_objfile
);
8573 objfile
->partial_symtabs
->psymtabs_addrmap
8574 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8575 objfile
->partial_symtabs
->obstack ());
8576 /* At this point we want to keep the address map. */
8577 save_psymtabs_addrmap
.release ();
8579 if (dwarf_read_debug
)
8580 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8581 objfile_name (objfile
));
8584 /* die_reader_func for load_partial_comp_unit. */
8587 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8588 const gdb_byte
*info_ptr
,
8589 struct die_info
*comp_unit_die
,
8593 struct dwarf2_cu
*cu
= reader
->cu
;
8595 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8597 /* Check if comp unit has_children.
8598 If so, read the rest of the partial symbols from this comp unit.
8599 If not, there's no more debug_info for this comp unit. */
8601 load_partial_dies (reader
, info_ptr
, 0);
8604 /* Load the partial DIEs for a secondary CU into memory.
8605 This is also used when rereading a primary CU with load_all_dies. */
8608 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8610 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8611 load_partial_comp_unit_reader
, NULL
);
8615 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8616 struct dwarf2_section_info
*section
,
8617 struct dwarf2_section_info
*abbrev_section
,
8618 unsigned int is_dwz
)
8620 const gdb_byte
*info_ptr
;
8621 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8623 if (dwarf_read_debug
)
8624 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8625 get_section_name (section
),
8626 get_section_file_name (section
));
8628 dwarf2_read_section (objfile
, section
);
8630 info_ptr
= section
->buffer
;
8632 while (info_ptr
< section
->buffer
+ section
->size
)
8634 struct dwarf2_per_cu_data
*this_cu
;
8636 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8638 comp_unit_head cu_header
;
8639 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8640 abbrev_section
, info_ptr
,
8641 rcuh_kind::COMPILE
);
8643 /* Save the compilation unit for later lookup. */
8644 if (cu_header
.unit_type
!= DW_UT_type
)
8646 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8647 struct dwarf2_per_cu_data
);
8648 memset (this_cu
, 0, sizeof (*this_cu
));
8652 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8653 struct signatured_type
);
8654 memset (sig_type
, 0, sizeof (*sig_type
));
8655 sig_type
->signature
= cu_header
.signature
;
8656 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8657 this_cu
= &sig_type
->per_cu
;
8659 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8660 this_cu
->sect_off
= sect_off
;
8661 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8662 this_cu
->is_dwz
= is_dwz
;
8663 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8664 this_cu
->section
= section
;
8666 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8668 info_ptr
= info_ptr
+ this_cu
->length
;
8672 /* Create a list of all compilation units in OBJFILE.
8673 This is only done for -readnow and building partial symtabs. */
8676 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8678 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8679 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8680 &dwarf2_per_objfile
->abbrev
, 0);
8682 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8684 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8688 /* Process all loaded DIEs for compilation unit CU, starting at
8689 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8690 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8691 DW_AT_ranges). See the comments of add_partial_subprogram on how
8692 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8695 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8696 CORE_ADDR
*highpc
, int set_addrmap
,
8697 struct dwarf2_cu
*cu
)
8699 struct partial_die_info
*pdi
;
8701 /* Now, march along the PDI's, descending into ones which have
8702 interesting children but skipping the children of the other ones,
8703 until we reach the end of the compilation unit. */
8711 /* Anonymous namespaces or modules have no name but have interesting
8712 children, so we need to look at them. Ditto for anonymous
8715 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8716 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8717 || pdi
->tag
== DW_TAG_imported_unit
8718 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8722 case DW_TAG_subprogram
:
8723 case DW_TAG_inlined_subroutine
:
8724 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8726 case DW_TAG_constant
:
8727 case DW_TAG_variable
:
8728 case DW_TAG_typedef
:
8729 case DW_TAG_union_type
:
8730 if (!pdi
->is_declaration
)
8732 add_partial_symbol (pdi
, cu
);
8735 case DW_TAG_class_type
:
8736 case DW_TAG_interface_type
:
8737 case DW_TAG_structure_type
:
8738 if (!pdi
->is_declaration
)
8740 add_partial_symbol (pdi
, cu
);
8742 if ((cu
->language
== language_rust
8743 || cu
->language
== language_cplus
) && pdi
->has_children
)
8744 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8747 case DW_TAG_enumeration_type
:
8748 if (!pdi
->is_declaration
)
8749 add_partial_enumeration (pdi
, cu
);
8751 case DW_TAG_base_type
:
8752 case DW_TAG_subrange_type
:
8753 /* File scope base type definitions are added to the partial
8755 add_partial_symbol (pdi
, cu
);
8757 case DW_TAG_namespace
:
8758 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8761 if (!pdi
->is_declaration
)
8762 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8764 case DW_TAG_imported_unit
:
8766 struct dwarf2_per_cu_data
*per_cu
;
8768 /* For now we don't handle imported units in type units. */
8769 if (cu
->per_cu
->is_debug_types
)
8771 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8772 " supported in type units [in module %s]"),
8773 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8776 per_cu
= dwarf2_find_containing_comp_unit
8777 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8778 cu
->per_cu
->dwarf2_per_objfile
);
8780 /* Go read the partial unit, if needed. */
8781 if (per_cu
->v
.psymtab
== NULL
)
8782 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8784 cu
->per_cu
->imported_symtabs_push (per_cu
);
8787 case DW_TAG_imported_declaration
:
8788 add_partial_symbol (pdi
, cu
);
8795 /* If the die has a sibling, skip to the sibling. */
8797 pdi
= pdi
->die_sibling
;
8801 /* Functions used to compute the fully scoped name of a partial DIE.
8803 Normally, this is simple. For C++, the parent DIE's fully scoped
8804 name is concatenated with "::" and the partial DIE's name.
8805 Enumerators are an exception; they use the scope of their parent
8806 enumeration type, i.e. the name of the enumeration type is not
8807 prepended to the enumerator.
8809 There are two complexities. One is DW_AT_specification; in this
8810 case "parent" means the parent of the target of the specification,
8811 instead of the direct parent of the DIE. The other is compilers
8812 which do not emit DW_TAG_namespace; in this case we try to guess
8813 the fully qualified name of structure types from their members'
8814 linkage names. This must be done using the DIE's children rather
8815 than the children of any DW_AT_specification target. We only need
8816 to do this for structures at the top level, i.e. if the target of
8817 any DW_AT_specification (if any; otherwise the DIE itself) does not
8820 /* Compute the scope prefix associated with PDI's parent, in
8821 compilation unit CU. The result will be allocated on CU's
8822 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8823 field. NULL is returned if no prefix is necessary. */
8825 partial_die_parent_scope (struct partial_die_info
*pdi
,
8826 struct dwarf2_cu
*cu
)
8828 const char *grandparent_scope
;
8829 struct partial_die_info
*parent
, *real_pdi
;
8831 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8832 then this means the parent of the specification DIE. */
8835 while (real_pdi
->has_specification
)
8837 auto res
= find_partial_die (real_pdi
->spec_offset
,
8838 real_pdi
->spec_is_dwz
, cu
);
8843 parent
= real_pdi
->die_parent
;
8847 if (parent
->scope_set
)
8848 return parent
->scope
;
8852 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8854 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8855 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8856 Work around this problem here. */
8857 if (cu
->language
== language_cplus
8858 && parent
->tag
== DW_TAG_namespace
8859 && strcmp (parent
->name
, "::") == 0
8860 && grandparent_scope
== NULL
)
8862 parent
->scope
= NULL
;
8863 parent
->scope_set
= 1;
8867 /* Nested subroutines in Fortran get a prefix. */
8868 if (pdi
->tag
== DW_TAG_enumerator
)
8869 /* Enumerators should not get the name of the enumeration as a prefix. */
8870 parent
->scope
= grandparent_scope
;
8871 else if (parent
->tag
== DW_TAG_namespace
8872 || parent
->tag
== DW_TAG_module
8873 || parent
->tag
== DW_TAG_structure_type
8874 || parent
->tag
== DW_TAG_class_type
8875 || parent
->tag
== DW_TAG_interface_type
8876 || parent
->tag
== DW_TAG_union_type
8877 || parent
->tag
== DW_TAG_enumeration_type
8878 || (cu
->language
== language_fortran
8879 && parent
->tag
== DW_TAG_subprogram
8880 && pdi
->tag
== DW_TAG_subprogram
))
8882 if (grandparent_scope
== NULL
)
8883 parent
->scope
= parent
->name
;
8885 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8887 parent
->name
, 0, cu
);
8891 /* FIXME drow/2004-04-01: What should we be doing with
8892 function-local names? For partial symbols, we should probably be
8894 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8895 dwarf_tag_name (parent
->tag
),
8896 sect_offset_str (pdi
->sect_off
));
8897 parent
->scope
= grandparent_scope
;
8900 parent
->scope_set
= 1;
8901 return parent
->scope
;
8904 /* Return the fully scoped name associated with PDI, from compilation unit
8905 CU. The result will be allocated with malloc. */
8908 partial_die_full_name (struct partial_die_info
*pdi
,
8909 struct dwarf2_cu
*cu
)
8911 const char *parent_scope
;
8913 /* If this is a template instantiation, we can not work out the
8914 template arguments from partial DIEs. So, unfortunately, we have
8915 to go through the full DIEs. At least any work we do building
8916 types here will be reused if full symbols are loaded later. */
8917 if (pdi
->has_template_arguments
)
8921 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8923 struct die_info
*die
;
8924 struct attribute attr
;
8925 struct dwarf2_cu
*ref_cu
= cu
;
8927 /* DW_FORM_ref_addr is using section offset. */
8928 attr
.name
= (enum dwarf_attribute
) 0;
8929 attr
.form
= DW_FORM_ref_addr
;
8930 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8931 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8933 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8937 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8938 if (parent_scope
== NULL
)
8941 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8945 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8947 struct dwarf2_per_objfile
*dwarf2_per_objfile
8948 = cu
->per_cu
->dwarf2_per_objfile
;
8949 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8950 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8952 const char *actual_name
= NULL
;
8954 char *built_actual_name
;
8956 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8958 built_actual_name
= partial_die_full_name (pdi
, cu
);
8959 if (built_actual_name
!= NULL
)
8960 actual_name
= built_actual_name
;
8962 if (actual_name
== NULL
)
8963 actual_name
= pdi
->name
;
8967 case DW_TAG_inlined_subroutine
:
8968 case DW_TAG_subprogram
:
8969 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8971 if (pdi
->is_external
8972 || cu
->language
== language_ada
8973 || (cu
->language
== language_fortran
8974 && pdi
->die_parent
!= NULL
8975 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8977 /* Normally, only "external" DIEs are part of the global scope.
8978 But in Ada and Fortran, we want to be able to access nested
8979 procedures globally. So all Ada and Fortran subprograms are
8980 stored in the global scope. */
8981 add_psymbol_to_list (actual_name
,
8982 built_actual_name
!= NULL
,
8983 VAR_DOMAIN
, LOC_BLOCK
,
8984 SECT_OFF_TEXT (objfile
),
8985 psymbol_placement::GLOBAL
,
8987 cu
->language
, objfile
);
8991 add_psymbol_to_list (actual_name
,
8992 built_actual_name
!= NULL
,
8993 VAR_DOMAIN
, LOC_BLOCK
,
8994 SECT_OFF_TEXT (objfile
),
8995 psymbol_placement::STATIC
,
8996 addr
, cu
->language
, objfile
);
8999 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
9000 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
9002 case DW_TAG_constant
:
9003 add_psymbol_to_list (actual_name
,
9004 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
9005 -1, (pdi
->is_external
9006 ? psymbol_placement::GLOBAL
9007 : psymbol_placement::STATIC
),
9008 0, cu
->language
, objfile
);
9010 case DW_TAG_variable
:
9012 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
9016 && !dwarf2_per_objfile
->has_section_at_zero
)
9018 /* A global or static variable may also have been stripped
9019 out by the linker if unused, in which case its address
9020 will be nullified; do not add such variables into partial
9021 symbol table then. */
9023 else if (pdi
->is_external
)
9026 Don't enter into the minimal symbol tables as there is
9027 a minimal symbol table entry from the ELF symbols already.
9028 Enter into partial symbol table if it has a location
9029 descriptor or a type.
9030 If the location descriptor is missing, new_symbol will create
9031 a LOC_UNRESOLVED symbol, the address of the variable will then
9032 be determined from the minimal symbol table whenever the variable
9034 The address for the partial symbol table entry is not
9035 used by GDB, but it comes in handy for debugging partial symbol
9038 if (pdi
->d
.locdesc
|| pdi
->has_type
)
9039 add_psymbol_to_list (actual_name
,
9040 built_actual_name
!= NULL
,
9041 VAR_DOMAIN
, LOC_STATIC
,
9042 SECT_OFF_TEXT (objfile
),
9043 psymbol_placement::GLOBAL
,
9044 addr
, cu
->language
, objfile
);
9048 int has_loc
= pdi
->d
.locdesc
!= NULL
;
9050 /* Static Variable. Skip symbols whose value we cannot know (those
9051 without location descriptors or constant values). */
9052 if (!has_loc
&& !pdi
->has_const_value
)
9054 xfree (built_actual_name
);
9058 add_psymbol_to_list (actual_name
,
9059 built_actual_name
!= NULL
,
9060 VAR_DOMAIN
, LOC_STATIC
,
9061 SECT_OFF_TEXT (objfile
),
9062 psymbol_placement::STATIC
,
9064 cu
->language
, objfile
);
9067 case DW_TAG_typedef
:
9068 case DW_TAG_base_type
:
9069 case DW_TAG_subrange_type
:
9070 add_psymbol_to_list (actual_name
,
9071 built_actual_name
!= NULL
,
9072 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9073 psymbol_placement::STATIC
,
9074 0, cu
->language
, objfile
);
9076 case DW_TAG_imported_declaration
:
9077 case DW_TAG_namespace
:
9078 add_psymbol_to_list (actual_name
,
9079 built_actual_name
!= NULL
,
9080 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9081 psymbol_placement::GLOBAL
,
9082 0, cu
->language
, objfile
);
9085 /* With Fortran 77 there might be a "BLOCK DATA" module
9086 available without any name. If so, we skip the module as it
9087 doesn't bring any value. */
9088 if (actual_name
!= nullptr)
9089 add_psymbol_to_list (actual_name
,
9090 built_actual_name
!= NULL
,
9091 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
9092 psymbol_placement::GLOBAL
,
9093 0, cu
->language
, objfile
);
9095 case DW_TAG_class_type
:
9096 case DW_TAG_interface_type
:
9097 case DW_TAG_structure_type
:
9098 case DW_TAG_union_type
:
9099 case DW_TAG_enumeration_type
:
9100 /* Skip external references. The DWARF standard says in the section
9101 about "Structure, Union, and Class Type Entries": "An incomplete
9102 structure, union or class type is represented by a structure,
9103 union or class entry that does not have a byte size attribute
9104 and that has a DW_AT_declaration attribute." */
9105 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9107 xfree (built_actual_name
);
9111 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9112 static vs. global. */
9113 add_psymbol_to_list (actual_name
,
9114 built_actual_name
!= NULL
,
9115 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
9116 cu
->language
== language_cplus
9117 ? psymbol_placement::GLOBAL
9118 : psymbol_placement::STATIC
,
9119 0, cu
->language
, objfile
);
9122 case DW_TAG_enumerator
:
9123 add_psymbol_to_list (actual_name
,
9124 built_actual_name
!= NULL
,
9125 VAR_DOMAIN
, LOC_CONST
, -1,
9126 cu
->language
== language_cplus
9127 ? psymbol_placement::GLOBAL
9128 : psymbol_placement::STATIC
,
9129 0, cu
->language
, objfile
);
9135 xfree (built_actual_name
);
9138 /* Read a partial die corresponding to a namespace; also, add a symbol
9139 corresponding to that namespace to the symbol table. NAMESPACE is
9140 the name of the enclosing namespace. */
9143 add_partial_namespace (struct partial_die_info
*pdi
,
9144 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9145 int set_addrmap
, struct dwarf2_cu
*cu
)
9147 /* Add a symbol for the namespace. */
9149 add_partial_symbol (pdi
, cu
);
9151 /* Now scan partial symbols in that namespace. */
9153 if (pdi
->has_children
)
9154 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9157 /* Read a partial die corresponding to a Fortran module. */
9160 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9161 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9163 /* Add a symbol for the namespace. */
9165 add_partial_symbol (pdi
, cu
);
9167 /* Now scan partial symbols in that module. */
9169 if (pdi
->has_children
)
9170 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9173 /* Read a partial die corresponding to a subprogram or an inlined
9174 subprogram and create a partial symbol for that subprogram.
9175 When the CU language allows it, this routine also defines a partial
9176 symbol for each nested subprogram that this subprogram contains.
9177 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9178 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9180 PDI may also be a lexical block, in which case we simply search
9181 recursively for subprograms defined inside that lexical block.
9182 Again, this is only performed when the CU language allows this
9183 type of definitions. */
9186 add_partial_subprogram (struct partial_die_info
*pdi
,
9187 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9188 int set_addrmap
, struct dwarf2_cu
*cu
)
9190 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9192 if (pdi
->has_pc_info
)
9194 if (pdi
->lowpc
< *lowpc
)
9195 *lowpc
= pdi
->lowpc
;
9196 if (pdi
->highpc
> *highpc
)
9197 *highpc
= pdi
->highpc
;
9200 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9201 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9203 CORE_ADDR this_highpc
;
9204 CORE_ADDR this_lowpc
;
9206 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9207 SECT_OFF_TEXT (objfile
));
9209 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9210 pdi
->lowpc
+ baseaddr
)
9213 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9214 pdi
->highpc
+ baseaddr
)
9216 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
9217 this_lowpc
, this_highpc
- 1,
9218 cu
->per_cu
->v
.psymtab
);
9222 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9224 if (!pdi
->is_declaration
)
9225 /* Ignore subprogram DIEs that do not have a name, they are
9226 illegal. Do not emit a complaint at this point, we will
9227 do so when we convert this psymtab into a symtab. */
9229 add_partial_symbol (pdi
, cu
);
9233 if (! pdi
->has_children
)
9236 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
9238 pdi
= pdi
->die_child
;
9242 if (pdi
->tag
== DW_TAG_subprogram
9243 || pdi
->tag
== DW_TAG_inlined_subroutine
9244 || pdi
->tag
== DW_TAG_lexical_block
)
9245 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9246 pdi
= pdi
->die_sibling
;
9251 /* Read a partial die corresponding to an enumeration type. */
9254 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9255 struct dwarf2_cu
*cu
)
9257 struct partial_die_info
*pdi
;
9259 if (enum_pdi
->name
!= NULL
)
9260 add_partial_symbol (enum_pdi
, cu
);
9262 pdi
= enum_pdi
->die_child
;
9265 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9266 complaint (_("malformed enumerator DIE ignored"));
9268 add_partial_symbol (pdi
, cu
);
9269 pdi
= pdi
->die_sibling
;
9273 /* Return the initial uleb128 in the die at INFO_PTR. */
9276 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9278 unsigned int bytes_read
;
9280 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9283 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9284 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9286 Return the corresponding abbrev, or NULL if the number is zero (indicating
9287 an empty DIE). In either case *BYTES_READ will be set to the length of
9288 the initial number. */
9290 static struct abbrev_info
*
9291 peek_die_abbrev (const die_reader_specs
&reader
,
9292 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9294 dwarf2_cu
*cu
= reader
.cu
;
9295 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9296 unsigned int abbrev_number
9297 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9299 if (abbrev_number
== 0)
9302 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9305 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9306 " at offset %s [in module %s]"),
9307 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9308 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9314 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9315 Returns a pointer to the end of a series of DIEs, terminated by an empty
9316 DIE. Any children of the skipped DIEs will also be skipped. */
9318 static const gdb_byte
*
9319 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9323 unsigned int bytes_read
;
9324 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9327 return info_ptr
+ bytes_read
;
9329 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9333 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9334 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9335 abbrev corresponding to that skipped uleb128 should be passed in
9336 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9339 static const gdb_byte
*
9340 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9341 struct abbrev_info
*abbrev
)
9343 unsigned int bytes_read
;
9344 struct attribute attr
;
9345 bfd
*abfd
= reader
->abfd
;
9346 struct dwarf2_cu
*cu
= reader
->cu
;
9347 const gdb_byte
*buffer
= reader
->buffer
;
9348 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9349 unsigned int form
, i
;
9351 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9353 /* The only abbrev we care about is DW_AT_sibling. */
9354 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9356 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9357 if (attr
.form
== DW_FORM_ref_addr
)
9358 complaint (_("ignoring absolute DW_AT_sibling"));
9361 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9362 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9364 if (sibling_ptr
< info_ptr
)
9365 complaint (_("DW_AT_sibling points backwards"));
9366 else if (sibling_ptr
> reader
->buffer_end
)
9367 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9373 /* If it isn't DW_AT_sibling, skip this attribute. */
9374 form
= abbrev
->attrs
[i
].form
;
9378 case DW_FORM_ref_addr
:
9379 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9380 and later it is offset sized. */
9381 if (cu
->header
.version
== 2)
9382 info_ptr
+= cu
->header
.addr_size
;
9384 info_ptr
+= cu
->header
.offset_size
;
9386 case DW_FORM_GNU_ref_alt
:
9387 info_ptr
+= cu
->header
.offset_size
;
9390 info_ptr
+= cu
->header
.addr_size
;
9398 case DW_FORM_flag_present
:
9399 case DW_FORM_implicit_const
:
9416 case DW_FORM_ref_sig8
:
9419 case DW_FORM_data16
:
9422 case DW_FORM_string
:
9423 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9424 info_ptr
+= bytes_read
;
9426 case DW_FORM_sec_offset
:
9428 case DW_FORM_GNU_strp_alt
:
9429 info_ptr
+= cu
->header
.offset_size
;
9431 case DW_FORM_exprloc
:
9433 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9434 info_ptr
+= bytes_read
;
9436 case DW_FORM_block1
:
9437 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9439 case DW_FORM_block2
:
9440 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9442 case DW_FORM_block4
:
9443 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9449 case DW_FORM_ref_udata
:
9450 case DW_FORM_GNU_addr_index
:
9451 case DW_FORM_GNU_str_index
:
9452 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9454 case DW_FORM_indirect
:
9455 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9456 info_ptr
+= bytes_read
;
9457 /* We need to continue parsing from here, so just go back to
9459 goto skip_attribute
;
9462 error (_("Dwarf Error: Cannot handle %s "
9463 "in DWARF reader [in module %s]"),
9464 dwarf_form_name (form
),
9465 bfd_get_filename (abfd
));
9469 if (abbrev
->has_children
)
9470 return skip_children (reader
, info_ptr
);
9475 /* Locate ORIG_PDI's sibling.
9476 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9478 static const gdb_byte
*
9479 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9480 struct partial_die_info
*orig_pdi
,
9481 const gdb_byte
*info_ptr
)
9483 /* Do we know the sibling already? */
9485 if (orig_pdi
->sibling
)
9486 return orig_pdi
->sibling
;
9488 /* Are there any children to deal with? */
9490 if (!orig_pdi
->has_children
)
9493 /* Skip the children the long way. */
9495 return skip_children (reader
, info_ptr
);
9498 /* Expand this partial symbol table into a full symbol table. SELF is
9502 dwarf2_read_symtab (struct partial_symtab
*self
,
9503 struct objfile
*objfile
)
9505 struct dwarf2_per_objfile
*dwarf2_per_objfile
9506 = get_dwarf2_per_objfile (objfile
);
9510 warning (_("bug: psymtab for %s is already read in."),
9517 printf_filtered (_("Reading in symbols for %s..."),
9519 gdb_flush (gdb_stdout
);
9522 /* If this psymtab is constructed from a debug-only objfile, the
9523 has_section_at_zero flag will not necessarily be correct. We
9524 can get the correct value for this flag by looking at the data
9525 associated with the (presumably stripped) associated objfile. */
9526 if (objfile
->separate_debug_objfile_backlink
)
9528 struct dwarf2_per_objfile
*dpo_backlink
9529 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9531 dwarf2_per_objfile
->has_section_at_zero
9532 = dpo_backlink
->has_section_at_zero
;
9535 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9537 psymtab_to_symtab_1 (self
);
9539 /* Finish up the debug error message. */
9541 printf_filtered (_("done.\n"));
9544 process_cu_includes (dwarf2_per_objfile
);
9547 /* Reading in full CUs. */
9549 /* Add PER_CU to the queue. */
9552 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9553 enum language pretend_language
)
9555 struct dwarf2_queue_item
*item
;
9558 item
= XNEW (struct dwarf2_queue_item
);
9559 item
->per_cu
= per_cu
;
9560 item
->pretend_language
= pretend_language
;
9563 if (dwarf2_queue
== NULL
)
9564 dwarf2_queue
= item
;
9566 dwarf2_queue_tail
->next
= item
;
9568 dwarf2_queue_tail
= item
;
9571 /* If PER_CU is not yet queued, add it to the queue.
9572 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9574 The result is non-zero if PER_CU was queued, otherwise the result is zero
9575 meaning either PER_CU is already queued or it is already loaded.
9577 N.B. There is an invariant here that if a CU is queued then it is loaded.
9578 The caller is required to load PER_CU if we return non-zero. */
9581 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9582 struct dwarf2_per_cu_data
*per_cu
,
9583 enum language pretend_language
)
9585 /* We may arrive here during partial symbol reading, if we need full
9586 DIEs to process an unusual case (e.g. template arguments). Do
9587 not queue PER_CU, just tell our caller to load its DIEs. */
9588 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9590 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9595 /* Mark the dependence relation so that we don't flush PER_CU
9597 if (dependent_cu
!= NULL
)
9598 dwarf2_add_dependence (dependent_cu
, per_cu
);
9600 /* If it's already on the queue, we have nothing to do. */
9604 /* If the compilation unit is already loaded, just mark it as
9606 if (per_cu
->cu
!= NULL
)
9608 per_cu
->cu
->last_used
= 0;
9612 /* Add it to the queue. */
9613 queue_comp_unit (per_cu
, pretend_language
);
9618 /* Process the queue. */
9621 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9623 struct dwarf2_queue_item
*item
, *next_item
;
9625 if (dwarf_read_debug
)
9627 fprintf_unfiltered (gdb_stdlog
,
9628 "Expanding one or more symtabs of objfile %s ...\n",
9629 objfile_name (dwarf2_per_objfile
->objfile
));
9632 /* The queue starts out with one item, but following a DIE reference
9633 may load a new CU, adding it to the end of the queue. */
9634 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9636 if ((dwarf2_per_objfile
->using_index
9637 ? !item
->per_cu
->v
.quick
->compunit_symtab
9638 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9639 /* Skip dummy CUs. */
9640 && item
->per_cu
->cu
!= NULL
)
9642 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9643 unsigned int debug_print_threshold
;
9646 if (per_cu
->is_debug_types
)
9648 struct signatured_type
*sig_type
=
9649 (struct signatured_type
*) per_cu
;
9651 sprintf (buf
, "TU %s at offset %s",
9652 hex_string (sig_type
->signature
),
9653 sect_offset_str (per_cu
->sect_off
));
9654 /* There can be 100s of TUs.
9655 Only print them in verbose mode. */
9656 debug_print_threshold
= 2;
9660 sprintf (buf
, "CU at offset %s",
9661 sect_offset_str (per_cu
->sect_off
));
9662 debug_print_threshold
= 1;
9665 if (dwarf_read_debug
>= debug_print_threshold
)
9666 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9668 if (per_cu
->is_debug_types
)
9669 process_full_type_unit (per_cu
, item
->pretend_language
);
9671 process_full_comp_unit (per_cu
, item
->pretend_language
);
9673 if (dwarf_read_debug
>= debug_print_threshold
)
9674 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9677 item
->per_cu
->queued
= 0;
9678 next_item
= item
->next
;
9682 dwarf2_queue_tail
= NULL
;
9684 if (dwarf_read_debug
)
9686 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9687 objfile_name (dwarf2_per_objfile
->objfile
));
9691 /* Read in full symbols for PST, and anything it depends on. */
9694 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9696 struct dwarf2_per_cu_data
*per_cu
;
9702 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9703 if (!pst
->dependencies
[i
]->readin
9704 && pst
->dependencies
[i
]->user
== NULL
)
9706 /* Inform about additional files that need to be read in. */
9709 /* FIXME: i18n: Need to make this a single string. */
9710 fputs_filtered (" ", gdb_stdout
);
9712 fputs_filtered ("and ", gdb_stdout
);
9714 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9715 wrap_here (""); /* Flush output. */
9716 gdb_flush (gdb_stdout
);
9718 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9721 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9725 /* It's an include file, no symbols to read for it.
9726 Everything is in the parent symtab. */
9731 dw2_do_instantiate_symtab (per_cu
, false);
9734 /* Trivial hash function for die_info: the hash value of a DIE
9735 is its offset in .debug_info for this objfile. */
9738 die_hash (const void *item
)
9740 const struct die_info
*die
= (const struct die_info
*) item
;
9742 return to_underlying (die
->sect_off
);
9745 /* Trivial comparison function for die_info structures: two DIEs
9746 are equal if they have the same offset. */
9749 die_eq (const void *item_lhs
, const void *item_rhs
)
9751 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9752 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9754 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9757 /* die_reader_func for load_full_comp_unit.
9758 This is identical to read_signatured_type_reader,
9759 but is kept separate for now. */
9762 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9763 const gdb_byte
*info_ptr
,
9764 struct die_info
*comp_unit_die
,
9768 struct dwarf2_cu
*cu
= reader
->cu
;
9769 enum language
*language_ptr
= (enum language
*) data
;
9771 gdb_assert (cu
->die_hash
== NULL
);
9773 htab_create_alloc_ex (cu
->header
.length
/ 12,
9777 &cu
->comp_unit_obstack
,
9778 hashtab_obstack_allocate
,
9779 dummy_obstack_deallocate
);
9782 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9783 &info_ptr
, comp_unit_die
);
9784 cu
->dies
= comp_unit_die
;
9785 /* comp_unit_die is not stored in die_hash, no need. */
9787 /* We try not to read any attributes in this function, because not
9788 all CUs needed for references have been loaded yet, and symbol
9789 table processing isn't initialized. But we have to set the CU language,
9790 or we won't be able to build types correctly.
9791 Similarly, if we do not read the producer, we can not apply
9792 producer-specific interpretation. */
9793 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9796 /* Load the DIEs associated with PER_CU into memory. */
9799 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9801 enum language pretend_language
)
9803 gdb_assert (! this_cu
->is_debug_types
);
9805 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9806 load_full_comp_unit_reader
, &pretend_language
);
9809 /* Add a DIE to the delayed physname list. */
9812 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9813 const char *name
, struct die_info
*die
,
9814 struct dwarf2_cu
*cu
)
9816 struct delayed_method_info mi
;
9818 mi
.fnfield_index
= fnfield_index
;
9822 cu
->method_list
.push_back (mi
);
9825 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9826 "const" / "volatile". If so, decrements LEN by the length of the
9827 modifier and return true. Otherwise return false. */
9831 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9833 size_t mod_len
= sizeof (mod
) - 1;
9834 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9842 /* Compute the physnames of any methods on the CU's method list.
9844 The computation of method physnames is delayed in order to avoid the
9845 (bad) condition that one of the method's formal parameters is of an as yet
9849 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9851 /* Only C++ delays computing physnames. */
9852 if (cu
->method_list
.empty ())
9854 gdb_assert (cu
->language
== language_cplus
);
9856 for (const delayed_method_info
&mi
: cu
->method_list
)
9858 const char *physname
;
9859 struct fn_fieldlist
*fn_flp
9860 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9861 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9862 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9863 = physname
? physname
: "";
9865 /* Since there's no tag to indicate whether a method is a
9866 const/volatile overload, extract that information out of the
9868 if (physname
!= NULL
)
9870 size_t len
= strlen (physname
);
9874 if (physname
[len
] == ')') /* shortcut */
9876 else if (check_modifier (physname
, len
, " const"))
9877 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9878 else if (check_modifier (physname
, len
, " volatile"))
9879 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9886 /* The list is no longer needed. */
9887 cu
->method_list
.clear ();
9890 /* Go objects should be embedded in a DW_TAG_module DIE,
9891 and it's not clear if/how imported objects will appear.
9892 To keep Go support simple until that's worked out,
9893 go back through what we've read and create something usable.
9894 We could do this while processing each DIE, and feels kinda cleaner,
9895 but that way is more invasive.
9896 This is to, for example, allow the user to type "p var" or "b main"
9897 without having to specify the package name, and allow lookups
9898 of module.object to work in contexts that use the expression
9902 fixup_go_packaging (struct dwarf2_cu
*cu
)
9904 char *package_name
= NULL
;
9905 struct pending
*list
;
9908 for (list
= *cu
->get_builder ()->get_global_symbols ();
9912 for (i
= 0; i
< list
->nsyms
; ++i
)
9914 struct symbol
*sym
= list
->symbol
[i
];
9916 if (SYMBOL_LANGUAGE (sym
) == language_go
9917 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9919 char *this_package_name
= go_symbol_package_name (sym
);
9921 if (this_package_name
== NULL
)
9923 if (package_name
== NULL
)
9924 package_name
= this_package_name
;
9927 struct objfile
*objfile
9928 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9929 if (strcmp (package_name
, this_package_name
) != 0)
9930 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9931 (symbol_symtab (sym
) != NULL
9932 ? symtab_to_filename_for_display
9933 (symbol_symtab (sym
))
9934 : objfile_name (objfile
)),
9935 this_package_name
, package_name
);
9936 xfree (this_package_name
);
9942 if (package_name
!= NULL
)
9944 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9945 const char *saved_package_name
9946 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
, package_name
);
9947 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9948 saved_package_name
);
9951 sym
= allocate_symbol (objfile
);
9952 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9953 SYMBOL_SET_NAMES (sym
, saved_package_name
, false, objfile
);
9954 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9955 e.g., "main" finds the "main" module and not C's main(). */
9956 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9957 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9958 SYMBOL_TYPE (sym
) = type
;
9960 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9962 xfree (package_name
);
9966 /* Allocate a fully-qualified name consisting of the two parts on the
9970 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9972 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9975 /* A helper that allocates a struct discriminant_info to attach to a
9978 static struct discriminant_info
*
9979 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9982 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9983 gdb_assert (discriminant_index
== -1
9984 || (discriminant_index
>= 0
9985 && discriminant_index
< TYPE_NFIELDS (type
)));
9986 gdb_assert (default_index
== -1
9987 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9989 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9991 struct discriminant_info
*disc
9992 = ((struct discriminant_info
*)
9994 offsetof (struct discriminant_info
, discriminants
)
9995 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9996 disc
->default_index
= default_index
;
9997 disc
->discriminant_index
= discriminant_index
;
9999 struct dynamic_prop prop
;
10000 prop
.kind
= PROP_UNDEFINED
;
10001 prop
.data
.baton
= disc
;
10003 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
10008 /* Some versions of rustc emitted enums in an unusual way.
10010 Ordinary enums were emitted as unions. The first element of each
10011 structure in the union was named "RUST$ENUM$DISR". This element
10012 held the discriminant.
10014 These versions of Rust also implemented the "non-zero"
10015 optimization. When the enum had two values, and one is empty and
10016 the other holds a pointer that cannot be zero, the pointer is used
10017 as the discriminant, with a zero value meaning the empty variant.
10018 Here, the union's first member is of the form
10019 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
10020 where the fieldnos are the indices of the fields that should be
10021 traversed in order to find the field (which may be several fields deep)
10022 and the variantname is the name of the variant of the case when the
10025 This function recognizes whether TYPE is of one of these forms,
10026 and, if so, smashes it to be a variant type. */
10029 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
10031 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
10033 /* We don't need to deal with empty enums. */
10034 if (TYPE_NFIELDS (type
) == 0)
10037 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
10038 if (TYPE_NFIELDS (type
) == 1
10039 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
10041 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
10043 /* Decode the field name to find the offset of the
10045 ULONGEST bit_offset
= 0;
10046 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
10047 while (name
[0] >= '0' && name
[0] <= '9')
10050 unsigned long index
= strtoul (name
, &tail
, 10);
10053 || index
>= TYPE_NFIELDS (field_type
)
10054 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
10055 != FIELD_LOC_KIND_BITPOS
))
10057 complaint (_("Could not parse Rust enum encoding string \"%s\""
10059 TYPE_FIELD_NAME (type
, 0),
10060 objfile_name (objfile
));
10065 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
10066 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
10069 /* Make a union to hold the variants. */
10070 struct type
*union_type
= alloc_type (objfile
);
10071 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10072 TYPE_NFIELDS (union_type
) = 3;
10073 TYPE_FIELDS (union_type
)
10074 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
10075 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10076 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10078 /* Put the discriminant must at index 0. */
10079 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
10080 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10081 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10082 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
10084 /* The order of fields doesn't really matter, so put the real
10085 field at index 1 and the data-less field at index 2. */
10086 struct discriminant_info
*disc
10087 = alloc_discriminant_info (union_type
, 0, 1);
10088 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
10089 TYPE_FIELD_NAME (union_type
, 1)
10090 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
10091 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
10092 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10093 TYPE_FIELD_NAME (union_type
, 1));
10095 const char *dataless_name
10096 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10098 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
10100 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
10101 /* NAME points into the original discriminant name, which
10102 already has the correct lifetime. */
10103 TYPE_FIELD_NAME (union_type
, 2) = name
;
10104 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
10105 disc
->discriminants
[2] = 0;
10107 /* Smash this type to be a structure type. We have to do this
10108 because the type has already been recorded. */
10109 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10110 TYPE_NFIELDS (type
) = 1;
10112 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
10114 /* Install the variant part. */
10115 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10116 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10117 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10119 /* A union with a single anonymous field is probably an old-style
10120 univariant enum. */
10121 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
10123 /* Smash this type to be a structure type. We have to do this
10124 because the type has already been recorded. */
10125 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10127 /* Make a union to hold the variants. */
10128 struct type
*union_type
= alloc_type (objfile
);
10129 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10130 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10131 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10132 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10133 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10135 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10136 const char *variant_name
10137 = rust_last_path_segment (TYPE_NAME (field_type
));
10138 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10139 TYPE_NAME (field_type
)
10140 = rust_fully_qualify (&objfile
->objfile_obstack
,
10141 TYPE_NAME (type
), variant_name
);
10143 /* Install the union in the outer struct type. */
10144 TYPE_NFIELDS (type
) = 1;
10146 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10147 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10148 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10149 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10151 alloc_discriminant_info (union_type
, -1, 0);
10155 struct type
*disr_type
= nullptr;
10156 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10158 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10160 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10162 /* All fields of a true enum will be structs. */
10165 else if (TYPE_NFIELDS (disr_type
) == 0)
10167 /* Could be data-less variant, so keep going. */
10168 disr_type
= nullptr;
10170 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10171 "RUST$ENUM$DISR") != 0)
10173 /* Not a Rust enum. */
10183 /* If we got here without a discriminant, then it's probably
10185 if (disr_type
== nullptr)
10188 /* Smash this type to be a structure type. We have to do this
10189 because the type has already been recorded. */
10190 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10192 /* Make a union to hold the variants. */
10193 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10194 struct type
*union_type
= alloc_type (objfile
);
10195 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10196 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10197 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10198 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10199 TYPE_FIELDS (union_type
)
10200 = (struct field
*) TYPE_ZALLOC (union_type
,
10201 (TYPE_NFIELDS (union_type
)
10202 * sizeof (struct field
)));
10204 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10205 TYPE_NFIELDS (type
) * sizeof (struct field
));
10207 /* Install the discriminant at index 0 in the union. */
10208 TYPE_FIELD (union_type
, 0) = *disr_field
;
10209 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10210 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10212 /* Install the union in the outer struct type. */
10213 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10214 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10215 TYPE_NFIELDS (type
) = 1;
10217 /* Set the size and offset of the union type. */
10218 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10220 /* We need a way to find the correct discriminant given a
10221 variant name. For convenience we build a map here. */
10222 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10223 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10224 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10226 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10229 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10230 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10234 int n_fields
= TYPE_NFIELDS (union_type
);
10235 struct discriminant_info
*disc
10236 = alloc_discriminant_info (union_type
, 0, -1);
10237 /* Skip the discriminant here. */
10238 for (int i
= 1; i
< n_fields
; ++i
)
10240 /* Find the final word in the name of this variant's type.
10241 That name can be used to look up the correct
10243 const char *variant_name
10244 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10247 auto iter
= discriminant_map
.find (variant_name
);
10248 if (iter
!= discriminant_map
.end ())
10249 disc
->discriminants
[i
] = iter
->second
;
10251 /* Remove the discriminant field, if it exists. */
10252 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10253 if (TYPE_NFIELDS (sub_type
) > 0)
10255 --TYPE_NFIELDS (sub_type
);
10256 ++TYPE_FIELDS (sub_type
);
10258 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10259 TYPE_NAME (sub_type
)
10260 = rust_fully_qualify (&objfile
->objfile_obstack
,
10261 TYPE_NAME (type
), variant_name
);
10266 /* Rewrite some Rust unions to be structures with variants parts. */
10269 rust_union_quirks (struct dwarf2_cu
*cu
)
10271 gdb_assert (cu
->language
== language_rust
);
10272 for (type
*type_
: cu
->rust_unions
)
10273 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10274 /* We don't need this any more. */
10275 cu
->rust_unions
.clear ();
10278 /* Return the symtab for PER_CU. This works properly regardless of
10279 whether we're using the index or psymtabs. */
10281 static struct compunit_symtab
*
10282 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10284 return (per_cu
->dwarf2_per_objfile
->using_index
10285 ? per_cu
->v
.quick
->compunit_symtab
10286 : per_cu
->v
.psymtab
->compunit_symtab
);
10289 /* A helper function for computing the list of all symbol tables
10290 included by PER_CU. */
10293 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
10294 htab_t all_children
, htab_t all_type_symtabs
,
10295 struct dwarf2_per_cu_data
*per_cu
,
10296 struct compunit_symtab
*immediate_parent
)
10299 struct compunit_symtab
*cust
;
10301 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10304 /* This inclusion and its children have been processed. */
10309 /* Only add a CU if it has a symbol table. */
10310 cust
= get_compunit_symtab (per_cu
);
10313 /* If this is a type unit only add its symbol table if we haven't
10314 seen it yet (type unit per_cu's can share symtabs). */
10315 if (per_cu
->is_debug_types
)
10317 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10321 result
->push_back (cust
);
10322 if (cust
->user
== NULL
)
10323 cust
->user
= immediate_parent
;
10328 result
->push_back (cust
);
10329 if (cust
->user
== NULL
)
10330 cust
->user
= immediate_parent
;
10334 if (!per_cu
->imported_symtabs_empty ())
10335 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
10337 recursively_compute_inclusions (result
, all_children
,
10338 all_type_symtabs
, ptr
, cust
);
10342 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10346 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10348 gdb_assert (! per_cu
->is_debug_types
);
10350 if (!per_cu
->imported_symtabs_empty ())
10353 std::vector
<compunit_symtab
*> result_symtabs
;
10354 htab_t all_children
, all_type_symtabs
;
10355 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10357 /* If we don't have a symtab, we can just skip this case. */
10361 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10362 NULL
, xcalloc
, xfree
);
10363 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10364 NULL
, xcalloc
, xfree
);
10366 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
10368 recursively_compute_inclusions (&result_symtabs
, all_children
,
10369 all_type_symtabs
, ptr
, cust
);
10372 /* Now we have a transitive closure of all the included symtabs. */
10373 len
= result_symtabs
.size ();
10375 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10376 struct compunit_symtab
*, len
+ 1);
10377 memcpy (cust
->includes
, result_symtabs
.data (),
10378 len
* sizeof (compunit_symtab
*));
10379 cust
->includes
[len
] = NULL
;
10381 htab_delete (all_children
);
10382 htab_delete (all_type_symtabs
);
10386 /* Compute the 'includes' field for the symtabs of all the CUs we just
10390 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10392 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10394 if (! iter
->is_debug_types
)
10395 compute_compunit_symtab_includes (iter
);
10398 dwarf2_per_objfile
->just_read_cus
.clear ();
10401 /* Generate full symbol information for PER_CU, whose DIEs have
10402 already been loaded into memory. */
10405 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10406 enum language pretend_language
)
10408 struct dwarf2_cu
*cu
= per_cu
->cu
;
10409 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10410 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10411 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10412 CORE_ADDR lowpc
, highpc
;
10413 struct compunit_symtab
*cust
;
10414 CORE_ADDR baseaddr
;
10415 struct block
*static_block
;
10418 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10420 /* Clear the list here in case something was left over. */
10421 cu
->method_list
.clear ();
10423 cu
->language
= pretend_language
;
10424 cu
->language_defn
= language_def (cu
->language
);
10426 /* Do line number decoding in read_file_scope () */
10427 process_die (cu
->dies
, cu
);
10429 /* For now fudge the Go package. */
10430 if (cu
->language
== language_go
)
10431 fixup_go_packaging (cu
);
10433 /* Now that we have processed all the DIEs in the CU, all the types
10434 should be complete, and it should now be safe to compute all of the
10436 compute_delayed_physnames (cu
);
10438 if (cu
->language
== language_rust
)
10439 rust_union_quirks (cu
);
10441 /* Some compilers don't define a DW_AT_high_pc attribute for the
10442 compilation unit. If the DW_AT_high_pc is missing, synthesize
10443 it, by scanning the DIE's below the compilation unit. */
10444 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10446 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10447 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10449 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10450 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10451 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10452 addrmap to help ensure it has an accurate map of pc values belonging to
10454 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10456 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10457 SECT_OFF_TEXT (objfile
),
10462 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10464 /* Set symtab language to language from DW_AT_language. If the
10465 compilation is from a C file generated by language preprocessors, do
10466 not set the language if it was already deduced by start_subfile. */
10467 if (!(cu
->language
== language_c
10468 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10469 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10471 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10472 produce DW_AT_location with location lists but it can be possibly
10473 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10474 there were bugs in prologue debug info, fixed later in GCC-4.5
10475 by "unwind info for epilogues" patch (which is not directly related).
10477 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10478 needed, it would be wrong due to missing DW_AT_producer there.
10480 Still one can confuse GDB by using non-standard GCC compilation
10481 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10483 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10484 cust
->locations_valid
= 1;
10486 if (gcc_4_minor
>= 5)
10487 cust
->epilogue_unwind_valid
= 1;
10489 cust
->call_site_htab
= cu
->call_site_htab
;
10492 if (dwarf2_per_objfile
->using_index
)
10493 per_cu
->v
.quick
->compunit_symtab
= cust
;
10496 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10497 pst
->compunit_symtab
= cust
;
10501 /* Push it for inclusion processing later. */
10502 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10504 /* Not needed any more. */
10505 cu
->reset_builder ();
10508 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10509 already been loaded into memory. */
10512 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10513 enum language pretend_language
)
10515 struct dwarf2_cu
*cu
= per_cu
->cu
;
10516 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10517 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10518 struct compunit_symtab
*cust
;
10519 struct signatured_type
*sig_type
;
10521 gdb_assert (per_cu
->is_debug_types
);
10522 sig_type
= (struct signatured_type
*) per_cu
;
10524 /* Clear the list here in case something was left over. */
10525 cu
->method_list
.clear ();
10527 cu
->language
= pretend_language
;
10528 cu
->language_defn
= language_def (cu
->language
);
10530 /* The symbol tables are set up in read_type_unit_scope. */
10531 process_die (cu
->dies
, cu
);
10533 /* For now fudge the Go package. */
10534 if (cu
->language
== language_go
)
10535 fixup_go_packaging (cu
);
10537 /* Now that we have processed all the DIEs in the CU, all the types
10538 should be complete, and it should now be safe to compute all of the
10540 compute_delayed_physnames (cu
);
10542 if (cu
->language
== language_rust
)
10543 rust_union_quirks (cu
);
10545 /* TUs share symbol tables.
10546 If this is the first TU to use this symtab, complete the construction
10547 of it with end_expandable_symtab. Otherwise, complete the addition of
10548 this TU's symbols to the existing symtab. */
10549 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10551 buildsym_compunit
*builder
= cu
->get_builder ();
10552 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10553 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10557 /* Set symtab language to language from DW_AT_language. If the
10558 compilation is from a C file generated by language preprocessors,
10559 do not set the language if it was already deduced by
10561 if (!(cu
->language
== language_c
10562 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10563 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10568 cu
->get_builder ()->augment_type_symtab ();
10569 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10572 if (dwarf2_per_objfile
->using_index
)
10573 per_cu
->v
.quick
->compunit_symtab
= cust
;
10576 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10577 pst
->compunit_symtab
= cust
;
10581 /* Not needed any more. */
10582 cu
->reset_builder ();
10585 /* Process an imported unit DIE. */
10588 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10590 struct attribute
*attr
;
10592 /* For now we don't handle imported units in type units. */
10593 if (cu
->per_cu
->is_debug_types
)
10595 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10596 " supported in type units [in module %s]"),
10597 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10600 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10603 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10604 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10605 dwarf2_per_cu_data
*per_cu
10606 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10607 cu
->per_cu
->dwarf2_per_objfile
);
10609 /* If necessary, add it to the queue and load its DIEs. */
10610 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10611 load_full_comp_unit (per_cu
, false, cu
->language
);
10613 cu
->per_cu
->imported_symtabs_push (per_cu
);
10617 /* RAII object that represents a process_die scope: i.e.,
10618 starts/finishes processing a DIE. */
10619 class process_die_scope
10622 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10623 : m_die (die
), m_cu (cu
)
10625 /* We should only be processing DIEs not already in process. */
10626 gdb_assert (!m_die
->in_process
);
10627 m_die
->in_process
= true;
10630 ~process_die_scope ()
10632 m_die
->in_process
= false;
10634 /* If we're done processing the DIE for the CU that owns the line
10635 header, we don't need the line header anymore. */
10636 if (m_cu
->line_header_die_owner
== m_die
)
10638 delete m_cu
->line_header
;
10639 m_cu
->line_header
= NULL
;
10640 m_cu
->line_header_die_owner
= NULL
;
10649 /* Process a die and its children. */
10652 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10654 process_die_scope
scope (die
, cu
);
10658 case DW_TAG_padding
:
10660 case DW_TAG_compile_unit
:
10661 case DW_TAG_partial_unit
:
10662 read_file_scope (die
, cu
);
10664 case DW_TAG_type_unit
:
10665 read_type_unit_scope (die
, cu
);
10667 case DW_TAG_subprogram
:
10668 /* Nested subprograms in Fortran get a prefix. */
10669 if (cu
->language
== language_fortran
10670 && die
->parent
!= NULL
10671 && die
->parent
->tag
== DW_TAG_subprogram
)
10672 cu
->processing_has_namespace_info
= true;
10673 /* Fall through. */
10674 case DW_TAG_inlined_subroutine
:
10675 read_func_scope (die
, cu
);
10677 case DW_TAG_lexical_block
:
10678 case DW_TAG_try_block
:
10679 case DW_TAG_catch_block
:
10680 read_lexical_block_scope (die
, cu
);
10682 case DW_TAG_call_site
:
10683 case DW_TAG_GNU_call_site
:
10684 read_call_site_scope (die
, cu
);
10686 case DW_TAG_class_type
:
10687 case DW_TAG_interface_type
:
10688 case DW_TAG_structure_type
:
10689 case DW_TAG_union_type
:
10690 process_structure_scope (die
, cu
);
10692 case DW_TAG_enumeration_type
:
10693 process_enumeration_scope (die
, cu
);
10696 /* These dies have a type, but processing them does not create
10697 a symbol or recurse to process the children. Therefore we can
10698 read them on-demand through read_type_die. */
10699 case DW_TAG_subroutine_type
:
10700 case DW_TAG_set_type
:
10701 case DW_TAG_array_type
:
10702 case DW_TAG_pointer_type
:
10703 case DW_TAG_ptr_to_member_type
:
10704 case DW_TAG_reference_type
:
10705 case DW_TAG_rvalue_reference_type
:
10706 case DW_TAG_string_type
:
10709 case DW_TAG_base_type
:
10710 case DW_TAG_subrange_type
:
10711 case DW_TAG_typedef
:
10712 /* Add a typedef symbol for the type definition, if it has a
10714 new_symbol (die
, read_type_die (die
, cu
), cu
);
10716 case DW_TAG_common_block
:
10717 read_common_block (die
, cu
);
10719 case DW_TAG_common_inclusion
:
10721 case DW_TAG_namespace
:
10722 cu
->processing_has_namespace_info
= true;
10723 read_namespace (die
, cu
);
10725 case DW_TAG_module
:
10726 cu
->processing_has_namespace_info
= true;
10727 read_module (die
, cu
);
10729 case DW_TAG_imported_declaration
:
10730 cu
->processing_has_namespace_info
= true;
10731 if (read_namespace_alias (die
, cu
))
10733 /* The declaration is not a global namespace alias. */
10734 /* Fall through. */
10735 case DW_TAG_imported_module
:
10736 cu
->processing_has_namespace_info
= true;
10737 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10738 || cu
->language
!= language_fortran
))
10739 complaint (_("Tag '%s' has unexpected children"),
10740 dwarf_tag_name (die
->tag
));
10741 read_import_statement (die
, cu
);
10744 case DW_TAG_imported_unit
:
10745 process_imported_unit_die (die
, cu
);
10748 case DW_TAG_variable
:
10749 read_variable (die
, cu
);
10753 new_symbol (die
, NULL
, cu
);
10758 /* DWARF name computation. */
10760 /* A helper function for dwarf2_compute_name which determines whether DIE
10761 needs to have the name of the scope prepended to the name listed in the
10765 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10767 struct attribute
*attr
;
10771 case DW_TAG_namespace
:
10772 case DW_TAG_typedef
:
10773 case DW_TAG_class_type
:
10774 case DW_TAG_interface_type
:
10775 case DW_TAG_structure_type
:
10776 case DW_TAG_union_type
:
10777 case DW_TAG_enumeration_type
:
10778 case DW_TAG_enumerator
:
10779 case DW_TAG_subprogram
:
10780 case DW_TAG_inlined_subroutine
:
10781 case DW_TAG_member
:
10782 case DW_TAG_imported_declaration
:
10785 case DW_TAG_variable
:
10786 case DW_TAG_constant
:
10787 /* We only need to prefix "globally" visible variables. These include
10788 any variable marked with DW_AT_external or any variable that
10789 lives in a namespace. [Variables in anonymous namespaces
10790 require prefixing, but they are not DW_AT_external.] */
10792 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10794 struct dwarf2_cu
*spec_cu
= cu
;
10796 return die_needs_namespace (die_specification (die
, &spec_cu
),
10800 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10801 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10802 && die
->parent
->tag
!= DW_TAG_module
)
10804 /* A variable in a lexical block of some kind does not need a
10805 namespace, even though in C++ such variables may be external
10806 and have a mangled name. */
10807 if (die
->parent
->tag
== DW_TAG_lexical_block
10808 || die
->parent
->tag
== DW_TAG_try_block
10809 || die
->parent
->tag
== DW_TAG_catch_block
10810 || die
->parent
->tag
== DW_TAG_subprogram
)
10819 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10820 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10821 defined for the given DIE. */
10823 static struct attribute
*
10824 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10826 struct attribute
*attr
;
10828 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10830 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10835 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10836 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10837 defined for the given DIE. */
10839 static const char *
10840 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10842 const char *linkage_name
;
10844 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10845 if (linkage_name
== NULL
)
10846 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10848 return linkage_name
;
10851 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10852 compute the physname for the object, which include a method's:
10853 - formal parameters (C++),
10854 - receiver type (Go),
10856 The term "physname" is a bit confusing.
10857 For C++, for example, it is the demangled name.
10858 For Go, for example, it's the mangled name.
10860 For Ada, return the DIE's linkage name rather than the fully qualified
10861 name. PHYSNAME is ignored..
10863 The result is allocated on the objfile_obstack and canonicalized. */
10865 static const char *
10866 dwarf2_compute_name (const char *name
,
10867 struct die_info
*die
, struct dwarf2_cu
*cu
,
10870 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10873 name
= dwarf2_name (die
, cu
);
10875 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10876 but otherwise compute it by typename_concat inside GDB.
10877 FIXME: Actually this is not really true, or at least not always true.
10878 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10879 Fortran names because there is no mangling standard. So new_symbol
10880 will set the demangled name to the result of dwarf2_full_name, and it is
10881 the demangled name that GDB uses if it exists. */
10882 if (cu
->language
== language_ada
10883 || (cu
->language
== language_fortran
&& physname
))
10885 /* For Ada unit, we prefer the linkage name over the name, as
10886 the former contains the exported name, which the user expects
10887 to be able to reference. Ideally, we want the user to be able
10888 to reference this entity using either natural or linkage name,
10889 but we haven't started looking at this enhancement yet. */
10890 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10892 if (linkage_name
!= NULL
)
10893 return linkage_name
;
10896 /* These are the only languages we know how to qualify names in. */
10898 && (cu
->language
== language_cplus
10899 || cu
->language
== language_fortran
|| cu
->language
== language_d
10900 || cu
->language
== language_rust
))
10902 if (die_needs_namespace (die
, cu
))
10904 const char *prefix
;
10905 const char *canonical_name
= NULL
;
10909 prefix
= determine_prefix (die
, cu
);
10910 if (*prefix
!= '\0')
10912 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10915 buf
.puts (prefixed_name
);
10916 xfree (prefixed_name
);
10921 /* Template parameters may be specified in the DIE's DW_AT_name, or
10922 as children with DW_TAG_template_type_param or
10923 DW_TAG_value_type_param. If the latter, add them to the name
10924 here. If the name already has template parameters, then
10925 skip this step; some versions of GCC emit both, and
10926 it is more efficient to use the pre-computed name.
10928 Something to keep in mind about this process: it is very
10929 unlikely, or in some cases downright impossible, to produce
10930 something that will match the mangled name of a function.
10931 If the definition of the function has the same debug info,
10932 we should be able to match up with it anyway. But fallbacks
10933 using the minimal symbol, for instance to find a method
10934 implemented in a stripped copy of libstdc++, will not work.
10935 If we do not have debug info for the definition, we will have to
10936 match them up some other way.
10938 When we do name matching there is a related problem with function
10939 templates; two instantiated function templates are allowed to
10940 differ only by their return types, which we do not add here. */
10942 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10944 struct attribute
*attr
;
10945 struct die_info
*child
;
10948 die
->building_fullname
= 1;
10950 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10954 const gdb_byte
*bytes
;
10955 struct dwarf2_locexpr_baton
*baton
;
10958 if (child
->tag
!= DW_TAG_template_type_param
10959 && child
->tag
!= DW_TAG_template_value_param
)
10970 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10973 complaint (_("template parameter missing DW_AT_type"));
10974 buf
.puts ("UNKNOWN_TYPE");
10977 type
= die_type (child
, cu
);
10979 if (child
->tag
== DW_TAG_template_type_param
)
10981 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10982 &type_print_raw_options
);
10986 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10989 complaint (_("template parameter missing "
10990 "DW_AT_const_value"));
10991 buf
.puts ("UNKNOWN_VALUE");
10995 dwarf2_const_value_attr (attr
, type
, name
,
10996 &cu
->comp_unit_obstack
, cu
,
10997 &value
, &bytes
, &baton
);
10999 if (TYPE_NOSIGN (type
))
11000 /* GDB prints characters as NUMBER 'CHAR'. If that's
11001 changed, this can use value_print instead. */
11002 c_printchar (value
, type
, &buf
);
11005 struct value_print_options opts
;
11008 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
11012 else if (bytes
!= NULL
)
11014 v
= allocate_value (type
);
11015 memcpy (value_contents_writeable (v
), bytes
,
11016 TYPE_LENGTH (type
));
11019 v
= value_from_longest (type
, value
);
11021 /* Specify decimal so that we do not depend on
11023 get_formatted_print_options (&opts
, 'd');
11025 value_print (v
, &buf
, &opts
);
11030 die
->building_fullname
= 0;
11034 /* Close the argument list, with a space if necessary
11035 (nested templates). */
11036 if (!buf
.empty () && buf
.string ().back () == '>')
11043 /* For C++ methods, append formal parameter type
11044 information, if PHYSNAME. */
11046 if (physname
&& die
->tag
== DW_TAG_subprogram
11047 && cu
->language
== language_cplus
)
11049 struct type
*type
= read_type_die (die
, cu
);
11051 c_type_print_args (type
, &buf
, 1, cu
->language
,
11052 &type_print_raw_options
);
11054 if (cu
->language
== language_cplus
)
11056 /* Assume that an artificial first parameter is
11057 "this", but do not crash if it is not. RealView
11058 marks unnamed (and thus unused) parameters as
11059 artificial; there is no way to differentiate
11061 if (TYPE_NFIELDS (type
) > 0
11062 && TYPE_FIELD_ARTIFICIAL (type
, 0)
11063 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
11064 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
11066 buf
.puts (" const");
11070 const std::string
&intermediate_name
= buf
.string ();
11072 if (cu
->language
== language_cplus
)
11074 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
11075 &objfile
->per_bfd
->storage_obstack
);
11077 /* If we only computed INTERMEDIATE_NAME, or if
11078 INTERMEDIATE_NAME is already canonical, then we need to
11079 copy it to the appropriate obstack. */
11080 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11081 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
11082 intermediate_name
);
11084 name
= canonical_name
;
11091 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11092 If scope qualifiers are appropriate they will be added. The result
11093 will be allocated on the storage_obstack, or NULL if the DIE does
11094 not have a name. NAME may either be from a previous call to
11095 dwarf2_name or NULL.
11097 The output string will be canonicalized (if C++). */
11099 static const char *
11100 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11102 return dwarf2_compute_name (name
, die
, cu
, 0);
11105 /* Construct a physname for the given DIE in CU. NAME may either be
11106 from a previous call to dwarf2_name or NULL. The result will be
11107 allocated on the objfile_objstack or NULL if the DIE does not have a
11110 The output string will be canonicalized (if C++). */
11112 static const char *
11113 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11115 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11116 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11119 /* In this case dwarf2_compute_name is just a shortcut not building anything
11121 if (!die_needs_namespace (die
, cu
))
11122 return dwarf2_compute_name (name
, die
, cu
, 1);
11124 mangled
= dw2_linkage_name (die
, cu
);
11126 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11127 See https://github.com/rust-lang/rust/issues/32925. */
11128 if (cu
->language
== language_rust
&& mangled
!= NULL
11129 && strchr (mangled
, '{') != NULL
)
11132 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11134 gdb::unique_xmalloc_ptr
<char> demangled
;
11135 if (mangled
!= NULL
)
11138 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11140 /* Do nothing (do not demangle the symbol name). */
11142 else if (cu
->language
== language_go
)
11144 /* This is a lie, but we already lie to the caller new_symbol.
11145 new_symbol assumes we return the mangled name.
11146 This just undoes that lie until things are cleaned up. */
11150 /* Use DMGL_RET_DROP for C++ template functions to suppress
11151 their return type. It is easier for GDB users to search
11152 for such functions as `name(params)' than `long name(params)'.
11153 In such case the minimal symbol names do not match the full
11154 symbol names but for template functions there is never a need
11155 to look up their definition from their declaration so
11156 the only disadvantage remains the minimal symbol variant
11157 `long name(params)' does not have the proper inferior type. */
11158 demangled
.reset (gdb_demangle (mangled
,
11159 (DMGL_PARAMS
| DMGL_ANSI
11160 | DMGL_RET_DROP
)));
11163 canon
= demangled
.get ();
11171 if (canon
== NULL
|| check_physname
)
11173 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11175 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11177 /* It may not mean a bug in GDB. The compiler could also
11178 compute DW_AT_linkage_name incorrectly. But in such case
11179 GDB would need to be bug-to-bug compatible. */
11181 complaint (_("Computed physname <%s> does not match demangled <%s> "
11182 "(from linkage <%s>) - DIE at %s [in module %s]"),
11183 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11184 objfile_name (objfile
));
11186 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11187 is available here - over computed PHYSNAME. It is safer
11188 against both buggy GDB and buggy compilers. */
11202 retval
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, retval
);
11207 /* Inspect DIE in CU for a namespace alias. If one exists, record
11208 a new symbol for it.
11210 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11213 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11215 struct attribute
*attr
;
11217 /* If the die does not have a name, this is not a namespace
11219 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11223 struct die_info
*d
= die
;
11224 struct dwarf2_cu
*imported_cu
= cu
;
11226 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11227 keep inspecting DIEs until we hit the underlying import. */
11228 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11229 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11231 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11235 d
= follow_die_ref (d
, attr
, &imported_cu
);
11236 if (d
->tag
!= DW_TAG_imported_declaration
)
11240 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11242 complaint (_("DIE at %s has too many recursively imported "
11243 "declarations"), sect_offset_str (d
->sect_off
));
11250 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11252 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11253 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11255 /* This declaration is a global namespace alias. Add
11256 a symbol for it whose type is the aliased namespace. */
11257 new_symbol (die
, type
, cu
);
11266 /* Return the using directives repository (global or local?) to use in the
11267 current context for CU.
11269 For Ada, imported declarations can materialize renamings, which *may* be
11270 global. However it is impossible (for now?) in DWARF to distinguish
11271 "external" imported declarations and "static" ones. As all imported
11272 declarations seem to be static in all other languages, make them all CU-wide
11273 global only in Ada. */
11275 static struct using_direct
**
11276 using_directives (struct dwarf2_cu
*cu
)
11278 if (cu
->language
== language_ada
11279 && cu
->get_builder ()->outermost_context_p ())
11280 return cu
->get_builder ()->get_global_using_directives ();
11282 return cu
->get_builder ()->get_local_using_directives ();
11285 /* Read the import statement specified by the given die and record it. */
11288 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11290 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11291 struct attribute
*import_attr
;
11292 struct die_info
*imported_die
, *child_die
;
11293 struct dwarf2_cu
*imported_cu
;
11294 const char *imported_name
;
11295 const char *imported_name_prefix
;
11296 const char *canonical_name
;
11297 const char *import_alias
;
11298 const char *imported_declaration
= NULL
;
11299 const char *import_prefix
;
11300 std::vector
<const char *> excludes
;
11302 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11303 if (import_attr
== NULL
)
11305 complaint (_("Tag '%s' has no DW_AT_import"),
11306 dwarf_tag_name (die
->tag
));
11311 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11312 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11313 if (imported_name
== NULL
)
11315 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11317 The import in the following code:
11331 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11332 <52> DW_AT_decl_file : 1
11333 <53> DW_AT_decl_line : 6
11334 <54> DW_AT_import : <0x75>
11335 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11336 <59> DW_AT_name : B
11337 <5b> DW_AT_decl_file : 1
11338 <5c> DW_AT_decl_line : 2
11339 <5d> DW_AT_type : <0x6e>
11341 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11342 <76> DW_AT_byte_size : 4
11343 <77> DW_AT_encoding : 5 (signed)
11345 imports the wrong die ( 0x75 instead of 0x58 ).
11346 This case will be ignored until the gcc bug is fixed. */
11350 /* Figure out the local name after import. */
11351 import_alias
= dwarf2_name (die
, cu
);
11353 /* Figure out where the statement is being imported to. */
11354 import_prefix
= determine_prefix (die
, cu
);
11356 /* Figure out what the scope of the imported die is and prepend it
11357 to the name of the imported die. */
11358 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11360 if (imported_die
->tag
!= DW_TAG_namespace
11361 && imported_die
->tag
!= DW_TAG_module
)
11363 imported_declaration
= imported_name
;
11364 canonical_name
= imported_name_prefix
;
11366 else if (strlen (imported_name_prefix
) > 0)
11367 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11368 imported_name_prefix
,
11369 (cu
->language
== language_d
? "." : "::"),
11370 imported_name
, (char *) NULL
);
11372 canonical_name
= imported_name
;
11374 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11375 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11376 child_die
= sibling_die (child_die
))
11378 /* DWARF-4: A Fortran use statement with a “rename list” may be
11379 represented by an imported module entry with an import attribute
11380 referring to the module and owned entries corresponding to those
11381 entities that are renamed as part of being imported. */
11383 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11385 complaint (_("child DW_TAG_imported_declaration expected "
11386 "- DIE at %s [in module %s]"),
11387 sect_offset_str (child_die
->sect_off
),
11388 objfile_name (objfile
));
11392 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11393 if (import_attr
== NULL
)
11395 complaint (_("Tag '%s' has no DW_AT_import"),
11396 dwarf_tag_name (child_die
->tag
));
11401 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11403 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11404 if (imported_name
== NULL
)
11406 complaint (_("child DW_TAG_imported_declaration has unknown "
11407 "imported name - DIE at %s [in module %s]"),
11408 sect_offset_str (child_die
->sect_off
),
11409 objfile_name (objfile
));
11413 excludes
.push_back (imported_name
);
11415 process_die (child_die
, cu
);
11418 add_using_directive (using_directives (cu
),
11422 imported_declaration
,
11425 &objfile
->objfile_obstack
);
11428 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11429 types, but gives them a size of zero. Starting with version 14,
11430 ICC is compatible with GCC. */
11433 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11435 if (!cu
->checked_producer
)
11436 check_producer (cu
);
11438 return cu
->producer_is_icc_lt_14
;
11441 /* ICC generates a DW_AT_type for C void functions. This was observed on
11442 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11443 which says that void functions should not have a DW_AT_type. */
11446 producer_is_icc (struct dwarf2_cu
*cu
)
11448 if (!cu
->checked_producer
)
11449 check_producer (cu
);
11451 return cu
->producer_is_icc
;
11454 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11455 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11456 this, it was first present in GCC release 4.3.0. */
11459 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11461 if (!cu
->checked_producer
)
11462 check_producer (cu
);
11464 return cu
->producer_is_gcc_lt_4_3
;
11467 static file_and_directory
11468 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11470 file_and_directory res
;
11472 /* Find the filename. Do not use dwarf2_name here, since the filename
11473 is not a source language identifier. */
11474 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11475 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11477 if (res
.comp_dir
== NULL
11478 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11479 && IS_ABSOLUTE_PATH (res
.name
))
11481 res
.comp_dir_storage
= ldirname (res
.name
);
11482 if (!res
.comp_dir_storage
.empty ())
11483 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11485 if (res
.comp_dir
!= NULL
)
11487 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11488 directory, get rid of it. */
11489 const char *cp
= strchr (res
.comp_dir
, ':');
11491 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11492 res
.comp_dir
= cp
+ 1;
11495 if (res
.name
== NULL
)
11496 res
.name
= "<unknown>";
11501 /* Handle DW_AT_stmt_list for a compilation unit.
11502 DIE is the DW_TAG_compile_unit die for CU.
11503 COMP_DIR is the compilation directory. LOWPC is passed to
11504 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11507 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11508 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11510 struct dwarf2_per_objfile
*dwarf2_per_objfile
11511 = cu
->per_cu
->dwarf2_per_objfile
;
11512 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11513 struct attribute
*attr
;
11514 struct line_header line_header_local
;
11515 hashval_t line_header_local_hash
;
11517 int decode_mapping
;
11519 gdb_assert (! cu
->per_cu
->is_debug_types
);
11521 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11525 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11527 /* The line header hash table is only created if needed (it exists to
11528 prevent redundant reading of the line table for partial_units).
11529 If we're given a partial_unit, we'll need it. If we're given a
11530 compile_unit, then use the line header hash table if it's already
11531 created, but don't create one just yet. */
11533 if (dwarf2_per_objfile
->line_header_hash
== NULL
11534 && die
->tag
== DW_TAG_partial_unit
)
11536 dwarf2_per_objfile
->line_header_hash
11537 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11538 line_header_eq_voidp
,
11539 free_line_header_voidp
,
11540 &objfile
->objfile_obstack
,
11541 hashtab_obstack_allocate
,
11542 dummy_obstack_deallocate
);
11545 line_header_local
.sect_off
= line_offset
;
11546 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11547 line_header_local_hash
= line_header_hash (&line_header_local
);
11548 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11550 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11551 &line_header_local
,
11552 line_header_local_hash
, NO_INSERT
);
11554 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11555 is not present in *SLOT (since if there is something in *SLOT then
11556 it will be for a partial_unit). */
11557 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11559 gdb_assert (*slot
!= NULL
);
11560 cu
->line_header
= (struct line_header
*) *slot
;
11565 /* dwarf_decode_line_header does not yet provide sufficient information.
11566 We always have to call also dwarf_decode_lines for it. */
11567 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11571 cu
->line_header
= lh
.release ();
11572 cu
->line_header_die_owner
= die
;
11574 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11578 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11579 &line_header_local
,
11580 line_header_local_hash
, INSERT
);
11581 gdb_assert (slot
!= NULL
);
11583 if (slot
!= NULL
&& *slot
== NULL
)
11585 /* This newly decoded line number information unit will be owned
11586 by line_header_hash hash table. */
11587 *slot
= cu
->line_header
;
11588 cu
->line_header_die_owner
= NULL
;
11592 /* We cannot free any current entry in (*slot) as that struct line_header
11593 may be already used by multiple CUs. Create only temporary decoded
11594 line_header for this CU - it may happen at most once for each line
11595 number information unit. And if we're not using line_header_hash
11596 then this is what we want as well. */
11597 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11599 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11600 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11605 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11608 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11610 struct dwarf2_per_objfile
*dwarf2_per_objfile
11611 = cu
->per_cu
->dwarf2_per_objfile
;
11612 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11613 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11614 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11615 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11616 struct attribute
*attr
;
11617 struct die_info
*child_die
;
11618 CORE_ADDR baseaddr
;
11620 prepare_one_comp_unit (cu
, die
, cu
->language
);
11621 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11623 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11625 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11626 from finish_block. */
11627 if (lowpc
== ((CORE_ADDR
) -1))
11629 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11631 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11633 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11634 standardised yet. As a workaround for the language detection we fall
11635 back to the DW_AT_producer string. */
11636 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11637 cu
->language
= language_opencl
;
11639 /* Similar hack for Go. */
11640 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11641 set_cu_language (DW_LANG_Go
, cu
);
11643 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11645 /* Decode line number information if present. We do this before
11646 processing child DIEs, so that the line header table is available
11647 for DW_AT_decl_file. */
11648 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11650 /* Process all dies in compilation unit. */
11651 if (die
->child
!= NULL
)
11653 child_die
= die
->child
;
11654 while (child_die
&& child_die
->tag
)
11656 process_die (child_die
, cu
);
11657 child_die
= sibling_die (child_die
);
11661 /* Decode macro information, if present. Dwarf 2 macro information
11662 refers to information in the line number info statement program
11663 header, so we can only read it if we've read the header
11665 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11667 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11668 if (attr
&& cu
->line_header
)
11670 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11671 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11673 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11677 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11678 if (attr
&& cu
->line_header
)
11680 unsigned int macro_offset
= DW_UNSND (attr
);
11682 dwarf_decode_macros (cu
, macro_offset
, 0);
11688 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11690 struct type_unit_group
*tu_group
;
11692 struct attribute
*attr
;
11694 struct signatured_type
*sig_type
;
11696 gdb_assert (per_cu
->is_debug_types
);
11697 sig_type
= (struct signatured_type
*) per_cu
;
11699 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11701 /* If we're using .gdb_index (includes -readnow) then
11702 per_cu->type_unit_group may not have been set up yet. */
11703 if (sig_type
->type_unit_group
== NULL
)
11704 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11705 tu_group
= sig_type
->type_unit_group
;
11707 /* If we've already processed this stmt_list there's no real need to
11708 do it again, we could fake it and just recreate the part we need
11709 (file name,index -> symtab mapping). If data shows this optimization
11710 is useful we can do it then. */
11711 first_time
= tu_group
->compunit_symtab
== NULL
;
11713 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11718 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11719 lh
= dwarf_decode_line_header (line_offset
, this);
11724 start_symtab ("", NULL
, 0);
11727 gdb_assert (tu_group
->symtabs
== NULL
);
11728 gdb_assert (m_builder
== nullptr);
11729 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11730 m_builder
.reset (new struct buildsym_compunit
11731 (COMPUNIT_OBJFILE (cust
), "",
11732 COMPUNIT_DIRNAME (cust
),
11733 compunit_language (cust
),
11739 line_header
= lh
.release ();
11740 line_header_die_owner
= die
;
11744 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11746 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11747 still initializing it, and our caller (a few levels up)
11748 process_full_type_unit still needs to know if this is the first
11751 tu_group
->num_symtabs
= line_header
->file_names_size ();
11752 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11753 line_header
->file_names_size ());
11755 auto &file_names
= line_header
->file_names ();
11756 for (i
= 0; i
< file_names
.size (); ++i
)
11758 file_entry
&fe
= file_names
[i
];
11759 dwarf2_start_subfile (this, fe
.name
,
11760 fe
.include_dir (line_header
));
11761 buildsym_compunit
*b
= get_builder ();
11762 if (b
->get_current_subfile ()->symtab
== NULL
)
11764 /* NOTE: start_subfile will recognize when it's been
11765 passed a file it has already seen. So we can't
11766 assume there's a simple mapping from
11767 cu->line_header->file_names to subfiles, plus
11768 cu->line_header->file_names may contain dups. */
11769 b
->get_current_subfile ()->symtab
11770 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11773 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11774 tu_group
->symtabs
[i
] = fe
.symtab
;
11779 gdb_assert (m_builder
== nullptr);
11780 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11781 m_builder
.reset (new struct buildsym_compunit
11782 (COMPUNIT_OBJFILE (cust
), "",
11783 COMPUNIT_DIRNAME (cust
),
11784 compunit_language (cust
),
11787 auto &file_names
= line_header
->file_names ();
11788 for (i
= 0; i
< file_names
.size (); ++i
)
11790 file_entry
&fe
= file_names
[i
];
11791 fe
.symtab
= tu_group
->symtabs
[i
];
11795 /* The main symtab is allocated last. Type units don't have DW_AT_name
11796 so they don't have a "real" (so to speak) symtab anyway.
11797 There is later code that will assign the main symtab to all symbols
11798 that don't have one. We need to handle the case of a symbol with a
11799 missing symtab (DW_AT_decl_file) anyway. */
11802 /* Process DW_TAG_type_unit.
11803 For TUs we want to skip the first top level sibling if it's not the
11804 actual type being defined by this TU. In this case the first top
11805 level sibling is there to provide context only. */
11808 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11810 struct die_info
*child_die
;
11812 prepare_one_comp_unit (cu
, die
, language_minimal
);
11814 /* Initialize (or reinitialize) the machinery for building symtabs.
11815 We do this before processing child DIEs, so that the line header table
11816 is available for DW_AT_decl_file. */
11817 cu
->setup_type_unit_groups (die
);
11819 if (die
->child
!= NULL
)
11821 child_die
= die
->child
;
11822 while (child_die
&& child_die
->tag
)
11824 process_die (child_die
, cu
);
11825 child_die
= sibling_die (child_die
);
11832 http://gcc.gnu.org/wiki/DebugFission
11833 http://gcc.gnu.org/wiki/DebugFissionDWP
11835 To simplify handling of both DWO files ("object" files with the DWARF info)
11836 and DWP files (a file with the DWOs packaged up into one file), we treat
11837 DWP files as having a collection of virtual DWO files. */
11840 hash_dwo_file (const void *item
)
11842 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11845 hash
= htab_hash_string (dwo_file
->dwo_name
);
11846 if (dwo_file
->comp_dir
!= NULL
)
11847 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11852 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11854 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11855 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11857 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11859 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11860 return lhs
->comp_dir
== rhs
->comp_dir
;
11861 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11864 /* Allocate a hash table for DWO files. */
11867 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11869 auto delete_dwo_file
= [] (void *item
)
11871 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11876 return htab_up (htab_create_alloc_ex (41,
11880 &objfile
->objfile_obstack
,
11881 hashtab_obstack_allocate
,
11882 dummy_obstack_deallocate
));
11885 /* Lookup DWO file DWO_NAME. */
11888 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11889 const char *dwo_name
,
11890 const char *comp_dir
)
11892 struct dwo_file find_entry
;
11895 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11896 dwarf2_per_objfile
->dwo_files
11897 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11899 find_entry
.dwo_name
= dwo_name
;
11900 find_entry
.comp_dir
= comp_dir
;
11901 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11908 hash_dwo_unit (const void *item
)
11910 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11912 /* This drops the top 32 bits of the id, but is ok for a hash. */
11913 return dwo_unit
->signature
;
11917 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11919 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11920 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11922 /* The signature is assumed to be unique within the DWO file.
11923 So while object file CU dwo_id's always have the value zero,
11924 that's OK, assuming each object file DWO file has only one CU,
11925 and that's the rule for now. */
11926 return lhs
->signature
== rhs
->signature
;
11929 /* Allocate a hash table for DWO CUs,TUs.
11930 There is one of these tables for each of CUs,TUs for each DWO file. */
11933 allocate_dwo_unit_table (struct objfile
*objfile
)
11935 /* Start out with a pretty small number.
11936 Generally DWO files contain only one CU and maybe some TUs. */
11937 return htab_create_alloc_ex (3,
11941 &objfile
->objfile_obstack
,
11942 hashtab_obstack_allocate
,
11943 dummy_obstack_deallocate
);
11946 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11948 struct create_dwo_cu_data
11950 struct dwo_file
*dwo_file
;
11951 struct dwo_unit dwo_unit
;
11954 /* die_reader_func for create_dwo_cu. */
11957 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11958 const gdb_byte
*info_ptr
,
11959 struct die_info
*comp_unit_die
,
11963 struct dwarf2_cu
*cu
= reader
->cu
;
11964 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11965 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11966 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11967 struct dwo_file
*dwo_file
= data
->dwo_file
;
11968 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11970 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11971 if (!signature
.has_value ())
11973 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11974 " its dwo_id [in module %s]"),
11975 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11979 dwo_unit
->dwo_file
= dwo_file
;
11980 dwo_unit
->signature
= *signature
;
11981 dwo_unit
->section
= section
;
11982 dwo_unit
->sect_off
= sect_off
;
11983 dwo_unit
->length
= cu
->per_cu
->length
;
11985 if (dwarf_read_debug
)
11986 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11987 sect_offset_str (sect_off
),
11988 hex_string (dwo_unit
->signature
));
11991 /* Create the dwo_units for the CUs in a DWO_FILE.
11992 Note: This function processes DWO files only, not DWP files. */
11995 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11996 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11999 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12000 const gdb_byte
*info_ptr
, *end_ptr
;
12002 dwarf2_read_section (objfile
, §ion
);
12003 info_ptr
= section
.buffer
;
12005 if (info_ptr
== NULL
)
12008 if (dwarf_read_debug
)
12010 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
12011 get_section_name (§ion
),
12012 get_section_file_name (§ion
));
12015 end_ptr
= info_ptr
+ section
.size
;
12016 while (info_ptr
< end_ptr
)
12018 struct dwarf2_per_cu_data per_cu
;
12019 struct create_dwo_cu_data create_dwo_cu_data
;
12020 struct dwo_unit
*dwo_unit
;
12022 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
12024 memset (&create_dwo_cu_data
.dwo_unit
, 0,
12025 sizeof (create_dwo_cu_data
.dwo_unit
));
12026 memset (&per_cu
, 0, sizeof (per_cu
));
12027 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
12028 per_cu
.is_debug_types
= 0;
12029 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
12030 per_cu
.section
= §ion
;
12031 create_dwo_cu_data
.dwo_file
= &dwo_file
;
12033 init_cutu_and_read_dies_no_follow (
12034 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
12035 info_ptr
+= per_cu
.length
;
12037 // If the unit could not be parsed, skip it.
12038 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
12041 if (cus_htab
== NULL
)
12042 cus_htab
= allocate_dwo_unit_table (objfile
);
12044 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12045 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
12046 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
12047 gdb_assert (slot
!= NULL
);
12050 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
12051 sect_offset dup_sect_off
= dup_cu
->sect_off
;
12053 complaint (_("debug cu entry at offset %s is duplicate to"
12054 " the entry at offset %s, signature %s"),
12055 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
12056 hex_string (dwo_unit
->signature
));
12058 *slot
= (void *)dwo_unit
;
12062 /* DWP file .debug_{cu,tu}_index section format:
12063 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
12067 Both index sections have the same format, and serve to map a 64-bit
12068 signature to a set of section numbers. Each section begins with a header,
12069 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
12070 indexes, and a pool of 32-bit section numbers. The index sections will be
12071 aligned at 8-byte boundaries in the file.
12073 The index section header consists of:
12075 V, 32 bit version number
12077 N, 32 bit number of compilation units or type units in the index
12078 M, 32 bit number of slots in the hash table
12080 Numbers are recorded using the byte order of the application binary.
12082 The hash table begins at offset 16 in the section, and consists of an array
12083 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12084 order of the application binary). Unused slots in the hash table are 0.
12085 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12087 The parallel table begins immediately after the hash table
12088 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12089 array of 32-bit indexes (using the byte order of the application binary),
12090 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12091 table contains a 32-bit index into the pool of section numbers. For unused
12092 hash table slots, the corresponding entry in the parallel table will be 0.
12094 The pool of section numbers begins immediately following the hash table
12095 (at offset 16 + 12 * M from the beginning of the section). The pool of
12096 section numbers consists of an array of 32-bit words (using the byte order
12097 of the application binary). Each item in the array is indexed starting
12098 from 0. The hash table entry provides the index of the first section
12099 number in the set. Additional section numbers in the set follow, and the
12100 set is terminated by a 0 entry (section number 0 is not used in ELF).
12102 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12103 section must be the first entry in the set, and the .debug_abbrev.dwo must
12104 be the second entry. Other members of the set may follow in any order.
12110 DWP Version 2 combines all the .debug_info, etc. sections into one,
12111 and the entries in the index tables are now offsets into these sections.
12112 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12115 Index Section Contents:
12117 Hash Table of Signatures dwp_hash_table.hash_table
12118 Parallel Table of Indices dwp_hash_table.unit_table
12119 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12120 Table of Section Sizes dwp_hash_table.v2.sizes
12122 The index section header consists of:
12124 V, 32 bit version number
12125 L, 32 bit number of columns in the table of section offsets
12126 N, 32 bit number of compilation units or type units in the index
12127 M, 32 bit number of slots in the hash table
12129 Numbers are recorded using the byte order of the application binary.
12131 The hash table has the same format as version 1.
12132 The parallel table of indices has the same format as version 1,
12133 except that the entries are origin-1 indices into the table of sections
12134 offsets and the table of section sizes.
12136 The table of offsets begins immediately following the parallel table
12137 (at offset 16 + 12 * M from the beginning of the section). The table is
12138 a two-dimensional array of 32-bit words (using the byte order of the
12139 application binary), with L columns and N+1 rows, in row-major order.
12140 Each row in the array is indexed starting from 0. The first row provides
12141 a key to the remaining rows: each column in this row provides an identifier
12142 for a debug section, and the offsets in the same column of subsequent rows
12143 refer to that section. The section identifiers are:
12145 DW_SECT_INFO 1 .debug_info.dwo
12146 DW_SECT_TYPES 2 .debug_types.dwo
12147 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12148 DW_SECT_LINE 4 .debug_line.dwo
12149 DW_SECT_LOC 5 .debug_loc.dwo
12150 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12151 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12152 DW_SECT_MACRO 8 .debug_macro.dwo
12154 The offsets provided by the CU and TU index sections are the base offsets
12155 for the contributions made by each CU or TU to the corresponding section
12156 in the package file. Each CU and TU header contains an abbrev_offset
12157 field, used to find the abbreviations table for that CU or TU within the
12158 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12159 be interpreted as relative to the base offset given in the index section.
12160 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12161 should be interpreted as relative to the base offset for .debug_line.dwo,
12162 and offsets into other debug sections obtained from DWARF attributes should
12163 also be interpreted as relative to the corresponding base offset.
12165 The table of sizes begins immediately following the table of offsets.
12166 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12167 with L columns and N rows, in row-major order. Each row in the array is
12168 indexed starting from 1 (row 0 is shared by the two tables).
12172 Hash table lookup is handled the same in version 1 and 2:
12174 We assume that N and M will not exceed 2^32 - 1.
12175 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12177 Given a 64-bit compilation unit signature or a type signature S, an entry
12178 in the hash table is located as follows:
12180 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12181 the low-order k bits all set to 1.
12183 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12185 3) If the hash table entry at index H matches the signature, use that
12186 entry. If the hash table entry at index H is unused (all zeroes),
12187 terminate the search: the signature is not present in the table.
12189 4) Let H = (H + H') modulo M. Repeat at Step 3.
12191 Because M > N and H' and M are relatively prime, the search is guaranteed
12192 to stop at an unused slot or find the match. */
12194 /* Create a hash table to map DWO IDs to their CU/TU entry in
12195 .debug_{info,types}.dwo in DWP_FILE.
12196 Returns NULL if there isn't one.
12197 Note: This function processes DWP files only, not DWO files. */
12199 static struct dwp_hash_table
*
12200 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12201 struct dwp_file
*dwp_file
, int is_debug_types
)
12203 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12204 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12205 const gdb_byte
*index_ptr
, *index_end
;
12206 struct dwarf2_section_info
*index
;
12207 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12208 struct dwp_hash_table
*htab
;
12210 if (is_debug_types
)
12211 index
= &dwp_file
->sections
.tu_index
;
12213 index
= &dwp_file
->sections
.cu_index
;
12215 if (dwarf2_section_empty_p (index
))
12217 dwarf2_read_section (objfile
, index
);
12219 index_ptr
= index
->buffer
;
12220 index_end
= index_ptr
+ index
->size
;
12222 version
= read_4_bytes (dbfd
, index_ptr
);
12225 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12229 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12231 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12234 if (version
!= 1 && version
!= 2)
12236 error (_("Dwarf Error: unsupported DWP file version (%s)"
12237 " [in module %s]"),
12238 pulongest (version
), dwp_file
->name
);
12240 if (nr_slots
!= (nr_slots
& -nr_slots
))
12242 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12243 " is not power of 2 [in module %s]"),
12244 pulongest (nr_slots
), dwp_file
->name
);
12247 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12248 htab
->version
= version
;
12249 htab
->nr_columns
= nr_columns
;
12250 htab
->nr_units
= nr_units
;
12251 htab
->nr_slots
= nr_slots
;
12252 htab
->hash_table
= index_ptr
;
12253 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12255 /* Exit early if the table is empty. */
12256 if (nr_slots
== 0 || nr_units
== 0
12257 || (version
== 2 && nr_columns
== 0))
12259 /* All must be zero. */
12260 if (nr_slots
!= 0 || nr_units
!= 0
12261 || (version
== 2 && nr_columns
!= 0))
12263 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12264 " all zero [in modules %s]"),
12272 htab
->section_pool
.v1
.indices
=
12273 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12274 /* It's harder to decide whether the section is too small in v1.
12275 V1 is deprecated anyway so we punt. */
12279 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12280 int *ids
= htab
->section_pool
.v2
.section_ids
;
12281 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
12282 /* Reverse map for error checking. */
12283 int ids_seen
[DW_SECT_MAX
+ 1];
12286 if (nr_columns
< 2)
12288 error (_("Dwarf Error: bad DWP hash table, too few columns"
12289 " in section table [in module %s]"),
12292 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12294 error (_("Dwarf Error: bad DWP hash table, too many columns"
12295 " in section table [in module %s]"),
12298 memset (ids
, 255, sizeof_ids
);
12299 memset (ids_seen
, 255, sizeof (ids_seen
));
12300 for (i
= 0; i
< nr_columns
; ++i
)
12302 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12304 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12306 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12307 " in section table [in module %s]"),
12308 id
, dwp_file
->name
);
12310 if (ids_seen
[id
] != -1)
12312 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12313 " id %d in section table [in module %s]"),
12314 id
, dwp_file
->name
);
12319 /* Must have exactly one info or types section. */
12320 if (((ids_seen
[DW_SECT_INFO
] != -1)
12321 + (ids_seen
[DW_SECT_TYPES
] != -1))
12324 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12325 " DWO info/types section [in module %s]"),
12328 /* Must have an abbrev section. */
12329 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12331 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12332 " section [in module %s]"),
12335 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12336 htab
->section_pool
.v2
.sizes
=
12337 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12338 * nr_units
* nr_columns
);
12339 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12340 * nr_units
* nr_columns
))
12343 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12344 " [in module %s]"),
12352 /* Update SECTIONS with the data from SECTP.
12354 This function is like the other "locate" section routines that are
12355 passed to bfd_map_over_sections, but in this context the sections to
12356 read comes from the DWP V1 hash table, not the full ELF section table.
12358 The result is non-zero for success, or zero if an error was found. */
12361 locate_v1_virtual_dwo_sections (asection
*sectp
,
12362 struct virtual_v1_dwo_sections
*sections
)
12364 const struct dwop_section_names
*names
= &dwop_section_names
;
12366 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12368 /* There can be only one. */
12369 if (sections
->abbrev
.s
.section
!= NULL
)
12371 sections
->abbrev
.s
.section
= sectp
;
12372 sections
->abbrev
.size
= bfd_section_size (sectp
);
12374 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12375 || section_is_p (sectp
->name
, &names
->types_dwo
))
12377 /* There can be only one. */
12378 if (sections
->info_or_types
.s
.section
!= NULL
)
12380 sections
->info_or_types
.s
.section
= sectp
;
12381 sections
->info_or_types
.size
= bfd_section_size (sectp
);
12383 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12385 /* There can be only one. */
12386 if (sections
->line
.s
.section
!= NULL
)
12388 sections
->line
.s
.section
= sectp
;
12389 sections
->line
.size
= bfd_section_size (sectp
);
12391 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12393 /* There can be only one. */
12394 if (sections
->loc
.s
.section
!= NULL
)
12396 sections
->loc
.s
.section
= sectp
;
12397 sections
->loc
.size
= bfd_section_size (sectp
);
12399 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12401 /* There can be only one. */
12402 if (sections
->macinfo
.s
.section
!= NULL
)
12404 sections
->macinfo
.s
.section
= sectp
;
12405 sections
->macinfo
.size
= bfd_section_size (sectp
);
12407 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12409 /* There can be only one. */
12410 if (sections
->macro
.s
.section
!= NULL
)
12412 sections
->macro
.s
.section
= sectp
;
12413 sections
->macro
.size
= bfd_section_size (sectp
);
12415 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12417 /* There can be only one. */
12418 if (sections
->str_offsets
.s
.section
!= NULL
)
12420 sections
->str_offsets
.s
.section
= sectp
;
12421 sections
->str_offsets
.size
= bfd_section_size (sectp
);
12425 /* No other kind of section is valid. */
12432 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12433 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12434 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12435 This is for DWP version 1 files. */
12437 static struct dwo_unit
*
12438 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12439 struct dwp_file
*dwp_file
,
12440 uint32_t unit_index
,
12441 const char *comp_dir
,
12442 ULONGEST signature
, int is_debug_types
)
12444 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12445 const struct dwp_hash_table
*dwp_htab
=
12446 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12447 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12448 const char *kind
= is_debug_types
? "TU" : "CU";
12449 struct dwo_file
*dwo_file
;
12450 struct dwo_unit
*dwo_unit
;
12451 struct virtual_v1_dwo_sections sections
;
12452 void **dwo_file_slot
;
12455 gdb_assert (dwp_file
->version
== 1);
12457 if (dwarf_read_debug
)
12459 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12461 pulongest (unit_index
), hex_string (signature
),
12465 /* Fetch the sections of this DWO unit.
12466 Put a limit on the number of sections we look for so that bad data
12467 doesn't cause us to loop forever. */
12469 #define MAX_NR_V1_DWO_SECTIONS \
12470 (1 /* .debug_info or .debug_types */ \
12471 + 1 /* .debug_abbrev */ \
12472 + 1 /* .debug_line */ \
12473 + 1 /* .debug_loc */ \
12474 + 1 /* .debug_str_offsets */ \
12475 + 1 /* .debug_macro or .debug_macinfo */ \
12476 + 1 /* trailing zero */)
12478 memset (§ions
, 0, sizeof (sections
));
12480 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12483 uint32_t section_nr
=
12484 read_4_bytes (dbfd
,
12485 dwp_htab
->section_pool
.v1
.indices
12486 + (unit_index
+ i
) * sizeof (uint32_t));
12488 if (section_nr
== 0)
12490 if (section_nr
>= dwp_file
->num_sections
)
12492 error (_("Dwarf Error: bad DWP hash table, section number too large"
12493 " [in module %s]"),
12497 sectp
= dwp_file
->elf_sections
[section_nr
];
12498 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12500 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12501 " [in module %s]"),
12507 || dwarf2_section_empty_p (§ions
.info_or_types
)
12508 || dwarf2_section_empty_p (§ions
.abbrev
))
12510 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12511 " [in module %s]"),
12514 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12516 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12517 " [in module %s]"),
12521 /* It's easier for the rest of the code if we fake a struct dwo_file and
12522 have dwo_unit "live" in that. At least for now.
12524 The DWP file can be made up of a random collection of CUs and TUs.
12525 However, for each CU + set of TUs that came from the same original DWO
12526 file, we can combine them back into a virtual DWO file to save space
12527 (fewer struct dwo_file objects to allocate). Remember that for really
12528 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12530 std::string virtual_dwo_name
=
12531 string_printf ("virtual-dwo/%d-%d-%d-%d",
12532 get_section_id (§ions
.abbrev
),
12533 get_section_id (§ions
.line
),
12534 get_section_id (§ions
.loc
),
12535 get_section_id (§ions
.str_offsets
));
12536 /* Can we use an existing virtual DWO file? */
12537 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12538 virtual_dwo_name
.c_str (),
12540 /* Create one if necessary. */
12541 if (*dwo_file_slot
== NULL
)
12543 if (dwarf_read_debug
)
12545 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12546 virtual_dwo_name
.c_str ());
12548 dwo_file
= new struct dwo_file
;
12549 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12551 dwo_file
->comp_dir
= comp_dir
;
12552 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12553 dwo_file
->sections
.line
= sections
.line
;
12554 dwo_file
->sections
.loc
= sections
.loc
;
12555 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12556 dwo_file
->sections
.macro
= sections
.macro
;
12557 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12558 /* The "str" section is global to the entire DWP file. */
12559 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12560 /* The info or types section is assigned below to dwo_unit,
12561 there's no need to record it in dwo_file.
12562 Also, we can't simply record type sections in dwo_file because
12563 we record a pointer into the vector in dwo_unit. As we collect more
12564 types we'll grow the vector and eventually have to reallocate space
12565 for it, invalidating all copies of pointers into the previous
12567 *dwo_file_slot
= dwo_file
;
12571 if (dwarf_read_debug
)
12573 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12574 virtual_dwo_name
.c_str ());
12576 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12579 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12580 dwo_unit
->dwo_file
= dwo_file
;
12581 dwo_unit
->signature
= signature
;
12582 dwo_unit
->section
=
12583 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12584 *dwo_unit
->section
= sections
.info_or_types
;
12585 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12590 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12591 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12592 piece within that section used by a TU/CU, return a virtual section
12593 of just that piece. */
12595 static struct dwarf2_section_info
12596 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12597 struct dwarf2_section_info
*section
,
12598 bfd_size_type offset
, bfd_size_type size
)
12600 struct dwarf2_section_info result
;
12603 gdb_assert (section
!= NULL
);
12604 gdb_assert (!section
->is_virtual
);
12606 memset (&result
, 0, sizeof (result
));
12607 result
.s
.containing_section
= section
;
12608 result
.is_virtual
= true;
12613 sectp
= get_section_bfd_section (section
);
12615 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12616 bounds of the real section. This is a pretty-rare event, so just
12617 flag an error (easier) instead of a warning and trying to cope. */
12619 || offset
+ size
> bfd_section_size (sectp
))
12621 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12622 " in section %s [in module %s]"),
12623 sectp
? bfd_section_name (sectp
) : "<unknown>",
12624 objfile_name (dwarf2_per_objfile
->objfile
));
12627 result
.virtual_offset
= offset
;
12628 result
.size
= size
;
12632 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12633 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12634 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12635 This is for DWP version 2 files. */
12637 static struct dwo_unit
*
12638 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12639 struct dwp_file
*dwp_file
,
12640 uint32_t unit_index
,
12641 const char *comp_dir
,
12642 ULONGEST signature
, int is_debug_types
)
12644 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12645 const struct dwp_hash_table
*dwp_htab
=
12646 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12647 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12648 const char *kind
= is_debug_types
? "TU" : "CU";
12649 struct dwo_file
*dwo_file
;
12650 struct dwo_unit
*dwo_unit
;
12651 struct virtual_v2_dwo_sections sections
;
12652 void **dwo_file_slot
;
12655 gdb_assert (dwp_file
->version
== 2);
12657 if (dwarf_read_debug
)
12659 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12661 pulongest (unit_index
), hex_string (signature
),
12665 /* Fetch the section offsets of this DWO unit. */
12667 memset (§ions
, 0, sizeof (sections
));
12669 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12671 uint32_t offset
= read_4_bytes (dbfd
,
12672 dwp_htab
->section_pool
.v2
.offsets
12673 + (((unit_index
- 1) * dwp_htab
->nr_columns
12675 * sizeof (uint32_t)));
12676 uint32_t size
= read_4_bytes (dbfd
,
12677 dwp_htab
->section_pool
.v2
.sizes
12678 + (((unit_index
- 1) * dwp_htab
->nr_columns
12680 * sizeof (uint32_t)));
12682 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12685 case DW_SECT_TYPES
:
12686 sections
.info_or_types_offset
= offset
;
12687 sections
.info_or_types_size
= size
;
12689 case DW_SECT_ABBREV
:
12690 sections
.abbrev_offset
= offset
;
12691 sections
.abbrev_size
= size
;
12694 sections
.line_offset
= offset
;
12695 sections
.line_size
= size
;
12698 sections
.loc_offset
= offset
;
12699 sections
.loc_size
= size
;
12701 case DW_SECT_STR_OFFSETS
:
12702 sections
.str_offsets_offset
= offset
;
12703 sections
.str_offsets_size
= size
;
12705 case DW_SECT_MACINFO
:
12706 sections
.macinfo_offset
= offset
;
12707 sections
.macinfo_size
= size
;
12709 case DW_SECT_MACRO
:
12710 sections
.macro_offset
= offset
;
12711 sections
.macro_size
= size
;
12716 /* It's easier for the rest of the code if we fake a struct dwo_file and
12717 have dwo_unit "live" in that. At least for now.
12719 The DWP file can be made up of a random collection of CUs and TUs.
12720 However, for each CU + set of TUs that came from the same original DWO
12721 file, we can combine them back into a virtual DWO file to save space
12722 (fewer struct dwo_file objects to allocate). Remember that for really
12723 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12725 std::string virtual_dwo_name
=
12726 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12727 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12728 (long) (sections
.line_size
? sections
.line_offset
: 0),
12729 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12730 (long) (sections
.str_offsets_size
12731 ? sections
.str_offsets_offset
: 0));
12732 /* Can we use an existing virtual DWO file? */
12733 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12734 virtual_dwo_name
.c_str (),
12736 /* Create one if necessary. */
12737 if (*dwo_file_slot
== NULL
)
12739 if (dwarf_read_debug
)
12741 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12742 virtual_dwo_name
.c_str ());
12744 dwo_file
= new struct dwo_file
;
12745 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12747 dwo_file
->comp_dir
= comp_dir
;
12748 dwo_file
->sections
.abbrev
=
12749 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12750 sections
.abbrev_offset
, sections
.abbrev_size
);
12751 dwo_file
->sections
.line
=
12752 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12753 sections
.line_offset
, sections
.line_size
);
12754 dwo_file
->sections
.loc
=
12755 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12756 sections
.loc_offset
, sections
.loc_size
);
12757 dwo_file
->sections
.macinfo
=
12758 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12759 sections
.macinfo_offset
, sections
.macinfo_size
);
12760 dwo_file
->sections
.macro
=
12761 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12762 sections
.macro_offset
, sections
.macro_size
);
12763 dwo_file
->sections
.str_offsets
=
12764 create_dwp_v2_section (dwarf2_per_objfile
,
12765 &dwp_file
->sections
.str_offsets
,
12766 sections
.str_offsets_offset
,
12767 sections
.str_offsets_size
);
12768 /* The "str" section is global to the entire DWP file. */
12769 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12770 /* The info or types section is assigned below to dwo_unit,
12771 there's no need to record it in dwo_file.
12772 Also, we can't simply record type sections in dwo_file because
12773 we record a pointer into the vector in dwo_unit. As we collect more
12774 types we'll grow the vector and eventually have to reallocate space
12775 for it, invalidating all copies of pointers into the previous
12777 *dwo_file_slot
= dwo_file
;
12781 if (dwarf_read_debug
)
12783 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12784 virtual_dwo_name
.c_str ());
12786 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12789 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12790 dwo_unit
->dwo_file
= dwo_file
;
12791 dwo_unit
->signature
= signature
;
12792 dwo_unit
->section
=
12793 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12794 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12796 ? &dwp_file
->sections
.types
12797 : &dwp_file
->sections
.info
,
12798 sections
.info_or_types_offset
,
12799 sections
.info_or_types_size
);
12800 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12805 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12806 Returns NULL if the signature isn't found. */
12808 static struct dwo_unit
*
12809 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12810 struct dwp_file
*dwp_file
, const char *comp_dir
,
12811 ULONGEST signature
, int is_debug_types
)
12813 const struct dwp_hash_table
*dwp_htab
=
12814 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12815 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12816 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12817 uint32_t hash
= signature
& mask
;
12818 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12821 struct dwo_unit find_dwo_cu
;
12823 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12824 find_dwo_cu
.signature
= signature
;
12825 slot
= htab_find_slot (is_debug_types
12826 ? dwp_file
->loaded_tus
12827 : dwp_file
->loaded_cus
,
12828 &find_dwo_cu
, INSERT
);
12831 return (struct dwo_unit
*) *slot
;
12833 /* Use a for loop so that we don't loop forever on bad debug info. */
12834 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12836 ULONGEST signature_in_table
;
12838 signature_in_table
=
12839 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12840 if (signature_in_table
== signature
)
12842 uint32_t unit_index
=
12843 read_4_bytes (dbfd
,
12844 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12846 if (dwp_file
->version
== 1)
12848 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12849 dwp_file
, unit_index
,
12850 comp_dir
, signature
,
12855 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12856 dwp_file
, unit_index
,
12857 comp_dir
, signature
,
12860 return (struct dwo_unit
*) *slot
;
12862 if (signature_in_table
== 0)
12864 hash
= (hash
+ hash2
) & mask
;
12867 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12868 " [in module %s]"),
12872 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12873 Open the file specified by FILE_NAME and hand it off to BFD for
12874 preliminary analysis. Return a newly initialized bfd *, which
12875 includes a canonicalized copy of FILE_NAME.
12876 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12877 SEARCH_CWD is true if the current directory is to be searched.
12878 It will be searched before debug-file-directory.
12879 If successful, the file is added to the bfd include table of the
12880 objfile's bfd (see gdb_bfd_record_inclusion).
12881 If unable to find/open the file, return NULL.
12882 NOTE: This function is derived from symfile_bfd_open. */
12884 static gdb_bfd_ref_ptr
12885 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12886 const char *file_name
, int is_dwp
, int search_cwd
)
12889 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12890 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12891 to debug_file_directory. */
12892 const char *search_path
;
12893 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12895 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12898 if (*debug_file_directory
!= '\0')
12900 search_path_holder
.reset (concat (".", dirname_separator_string
,
12901 debug_file_directory
,
12903 search_path
= search_path_holder
.get ();
12909 search_path
= debug_file_directory
;
12911 openp_flags flags
= OPF_RETURN_REALPATH
;
12913 flags
|= OPF_SEARCH_IN_PATH
;
12915 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12916 desc
= openp (search_path
, flags
, file_name
,
12917 O_RDONLY
| O_BINARY
, &absolute_name
);
12921 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12923 if (sym_bfd
== NULL
)
12925 bfd_set_cacheable (sym_bfd
.get (), 1);
12927 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12930 /* Success. Record the bfd as having been included by the objfile's bfd.
12931 This is important because things like demangled_names_hash lives in the
12932 objfile's per_bfd space and may have references to things like symbol
12933 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12934 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12939 /* Try to open DWO file FILE_NAME.
12940 COMP_DIR is the DW_AT_comp_dir attribute.
12941 The result is the bfd handle of the file.
12942 If there is a problem finding or opening the file, return NULL.
12943 Upon success, the canonicalized path of the file is stored in the bfd,
12944 same as symfile_bfd_open. */
12946 static gdb_bfd_ref_ptr
12947 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12948 const char *file_name
, const char *comp_dir
)
12950 if (IS_ABSOLUTE_PATH (file_name
))
12951 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12952 0 /*is_dwp*/, 0 /*search_cwd*/);
12954 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12956 if (comp_dir
!= NULL
)
12958 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12959 file_name
, (char *) NULL
);
12961 /* NOTE: If comp_dir is a relative path, this will also try the
12962 search path, which seems useful. */
12963 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12966 1 /*search_cwd*/));
12967 xfree (path_to_try
);
12972 /* That didn't work, try debug-file-directory, which, despite its name,
12973 is a list of paths. */
12975 if (*debug_file_directory
== '\0')
12978 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12979 0 /*is_dwp*/, 1 /*search_cwd*/);
12982 /* This function is mapped across the sections and remembers the offset and
12983 size of each of the DWO debugging sections we are interested in. */
12986 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12988 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12989 const struct dwop_section_names
*names
= &dwop_section_names
;
12991 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12993 dwo_sections
->abbrev
.s
.section
= sectp
;
12994 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12996 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12998 dwo_sections
->info
.s
.section
= sectp
;
12999 dwo_sections
->info
.size
= bfd_section_size (sectp
);
13001 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13003 dwo_sections
->line
.s
.section
= sectp
;
13004 dwo_sections
->line
.size
= bfd_section_size (sectp
);
13006 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13008 dwo_sections
->loc
.s
.section
= sectp
;
13009 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
13011 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13013 dwo_sections
->macinfo
.s
.section
= sectp
;
13014 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
13016 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13018 dwo_sections
->macro
.s
.section
= sectp
;
13019 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
13021 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
13023 dwo_sections
->str
.s
.section
= sectp
;
13024 dwo_sections
->str
.size
= bfd_section_size (sectp
);
13026 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13028 dwo_sections
->str_offsets
.s
.section
= sectp
;
13029 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
13031 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13033 struct dwarf2_section_info type_section
;
13035 memset (&type_section
, 0, sizeof (type_section
));
13036 type_section
.s
.section
= sectp
;
13037 type_section
.size
= bfd_section_size (sectp
);
13038 dwo_sections
->types
.push_back (type_section
);
13042 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
13043 by PER_CU. This is for the non-DWP case.
13044 The result is NULL if DWO_NAME can't be found. */
13046 static struct dwo_file
*
13047 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
13048 const char *dwo_name
, const char *comp_dir
)
13050 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
13052 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
13055 if (dwarf_read_debug
)
13056 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
13060 dwo_file_up
dwo_file (new struct dwo_file
);
13061 dwo_file
->dwo_name
= dwo_name
;
13062 dwo_file
->comp_dir
= comp_dir
;
13063 dwo_file
->dbfd
= std::move (dbfd
);
13065 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
13066 &dwo_file
->sections
);
13068 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
13071 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
13072 dwo_file
->sections
.types
, dwo_file
->tus
);
13074 if (dwarf_read_debug
)
13075 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13077 return dwo_file
.release ();
13080 /* This function is mapped across the sections and remembers the offset and
13081 size of each of the DWP debugging sections common to version 1 and 2 that
13082 we are interested in. */
13085 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13086 void *dwp_file_ptr
)
13088 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13089 const struct dwop_section_names
*names
= &dwop_section_names
;
13090 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13092 /* Record the ELF section number for later lookup: this is what the
13093 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13094 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13095 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13097 /* Look for specific sections that we need. */
13098 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13100 dwp_file
->sections
.str
.s
.section
= sectp
;
13101 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
13103 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13105 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13106 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
13108 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13110 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13111 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
13115 /* This function is mapped across the sections and remembers the offset and
13116 size of each of the DWP version 2 debugging sections that we are interested
13117 in. This is split into a separate function because we don't know if we
13118 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13121 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13123 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13124 const struct dwop_section_names
*names
= &dwop_section_names
;
13125 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13127 /* Record the ELF section number for later lookup: this is what the
13128 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13129 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13130 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13132 /* Look for specific sections that we need. */
13133 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13135 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13136 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
13138 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13140 dwp_file
->sections
.info
.s
.section
= sectp
;
13141 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
13143 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13145 dwp_file
->sections
.line
.s
.section
= sectp
;
13146 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
13148 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13150 dwp_file
->sections
.loc
.s
.section
= sectp
;
13151 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
13153 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13155 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13156 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
13158 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13160 dwp_file
->sections
.macro
.s
.section
= sectp
;
13161 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
13163 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13165 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13166 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
13168 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13170 dwp_file
->sections
.types
.s
.section
= sectp
;
13171 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
13175 /* Hash function for dwp_file loaded CUs/TUs. */
13178 hash_dwp_loaded_cutus (const void *item
)
13180 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13182 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13183 return dwo_unit
->signature
;
13186 /* Equality function for dwp_file loaded CUs/TUs. */
13189 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13191 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13192 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13194 return dua
->signature
== dub
->signature
;
13197 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13200 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13202 return htab_create_alloc_ex (3,
13203 hash_dwp_loaded_cutus
,
13204 eq_dwp_loaded_cutus
,
13206 &objfile
->objfile_obstack
,
13207 hashtab_obstack_allocate
,
13208 dummy_obstack_deallocate
);
13211 /* Try to open DWP file FILE_NAME.
13212 The result is the bfd handle of the file.
13213 If there is a problem finding or opening the file, return NULL.
13214 Upon success, the canonicalized path of the file is stored in the bfd,
13215 same as symfile_bfd_open. */
13217 static gdb_bfd_ref_ptr
13218 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13219 const char *file_name
)
13221 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13223 1 /*search_cwd*/));
13227 /* Work around upstream bug 15652.
13228 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13229 [Whether that's a "bug" is debatable, but it is getting in our way.]
13230 We have no real idea where the dwp file is, because gdb's realpath-ing
13231 of the executable's path may have discarded the needed info.
13232 [IWBN if the dwp file name was recorded in the executable, akin to
13233 .gnu_debuglink, but that doesn't exist yet.]
13234 Strip the directory from FILE_NAME and search again. */
13235 if (*debug_file_directory
!= '\0')
13237 /* Don't implicitly search the current directory here.
13238 If the user wants to search "." to handle this case,
13239 it must be added to debug-file-directory. */
13240 return try_open_dwop_file (dwarf2_per_objfile
,
13241 lbasename (file_name
), 1 /*is_dwp*/,
13248 /* Initialize the use of the DWP file for the current objfile.
13249 By convention the name of the DWP file is ${objfile}.dwp.
13250 The result is NULL if it can't be found. */
13252 static std::unique_ptr
<struct dwp_file
>
13253 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13255 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13257 /* Try to find first .dwp for the binary file before any symbolic links
13260 /* If the objfile is a debug file, find the name of the real binary
13261 file and get the name of dwp file from there. */
13262 std::string dwp_name
;
13263 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13265 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13266 const char *backlink_basename
= lbasename (backlink
->original_name
);
13268 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13271 dwp_name
= objfile
->original_name
;
13273 dwp_name
+= ".dwp";
13275 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13277 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13279 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13280 dwp_name
= objfile_name (objfile
);
13281 dwp_name
+= ".dwp";
13282 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13287 if (dwarf_read_debug
)
13288 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13289 return std::unique_ptr
<dwp_file
> ();
13292 const char *name
= bfd_get_filename (dbfd
.get ());
13293 std::unique_ptr
<struct dwp_file
> dwp_file
13294 (new struct dwp_file (name
, std::move (dbfd
)));
13296 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13297 dwp_file
->elf_sections
=
13298 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13299 dwp_file
->num_sections
, asection
*);
13301 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13302 dwarf2_locate_common_dwp_sections
,
13305 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13308 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13311 /* The DWP file version is stored in the hash table. Oh well. */
13312 if (dwp_file
->cus
&& dwp_file
->tus
13313 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13315 /* Technically speaking, we should try to limp along, but this is
13316 pretty bizarre. We use pulongest here because that's the established
13317 portability solution (e.g, we cannot use %u for uint32_t). */
13318 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13319 " TU version %s [in DWP file %s]"),
13320 pulongest (dwp_file
->cus
->version
),
13321 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13325 dwp_file
->version
= dwp_file
->cus
->version
;
13326 else if (dwp_file
->tus
)
13327 dwp_file
->version
= dwp_file
->tus
->version
;
13329 dwp_file
->version
= 2;
13331 if (dwp_file
->version
== 2)
13332 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13333 dwarf2_locate_v2_dwp_sections
,
13336 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13337 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13339 if (dwarf_read_debug
)
13341 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13342 fprintf_unfiltered (gdb_stdlog
,
13343 " %s CUs, %s TUs\n",
13344 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13345 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13351 /* Wrapper around open_and_init_dwp_file, only open it once. */
13353 static struct dwp_file
*
13354 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13356 if (! dwarf2_per_objfile
->dwp_checked
)
13358 dwarf2_per_objfile
->dwp_file
13359 = open_and_init_dwp_file (dwarf2_per_objfile
);
13360 dwarf2_per_objfile
->dwp_checked
= 1;
13362 return dwarf2_per_objfile
->dwp_file
.get ();
13365 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13366 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13367 or in the DWP file for the objfile, referenced by THIS_UNIT.
13368 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13369 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13371 This is called, for example, when wanting to read a variable with a
13372 complex location. Therefore we don't want to do file i/o for every call.
13373 Therefore we don't want to look for a DWO file on every call.
13374 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13375 then we check if we've already seen DWO_NAME, and only THEN do we check
13378 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13379 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13381 static struct dwo_unit
*
13382 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13383 const char *dwo_name
, const char *comp_dir
,
13384 ULONGEST signature
, int is_debug_types
)
13386 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13387 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13388 const char *kind
= is_debug_types
? "TU" : "CU";
13389 void **dwo_file_slot
;
13390 struct dwo_file
*dwo_file
;
13391 struct dwp_file
*dwp_file
;
13393 /* First see if there's a DWP file.
13394 If we have a DWP file but didn't find the DWO inside it, don't
13395 look for the original DWO file. It makes gdb behave differently
13396 depending on whether one is debugging in the build tree. */
13398 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13399 if (dwp_file
!= NULL
)
13401 const struct dwp_hash_table
*dwp_htab
=
13402 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13404 if (dwp_htab
!= NULL
)
13406 struct dwo_unit
*dwo_cutu
=
13407 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13408 signature
, is_debug_types
);
13410 if (dwo_cutu
!= NULL
)
13412 if (dwarf_read_debug
)
13414 fprintf_unfiltered (gdb_stdlog
,
13415 "Virtual DWO %s %s found: @%s\n",
13416 kind
, hex_string (signature
),
13417 host_address_to_string (dwo_cutu
));
13425 /* No DWP file, look for the DWO file. */
13427 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13428 dwo_name
, comp_dir
);
13429 if (*dwo_file_slot
== NULL
)
13431 /* Read in the file and build a table of the CUs/TUs it contains. */
13432 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13434 /* NOTE: This will be NULL if unable to open the file. */
13435 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13437 if (dwo_file
!= NULL
)
13439 struct dwo_unit
*dwo_cutu
= NULL
;
13441 if (is_debug_types
&& dwo_file
->tus
)
13443 struct dwo_unit find_dwo_cutu
;
13445 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13446 find_dwo_cutu
.signature
= signature
;
13448 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13450 else if (!is_debug_types
&& dwo_file
->cus
)
13452 struct dwo_unit find_dwo_cutu
;
13454 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13455 find_dwo_cutu
.signature
= signature
;
13456 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13460 if (dwo_cutu
!= NULL
)
13462 if (dwarf_read_debug
)
13464 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13465 kind
, dwo_name
, hex_string (signature
),
13466 host_address_to_string (dwo_cutu
));
13473 /* We didn't find it. This could mean a dwo_id mismatch, or
13474 someone deleted the DWO/DWP file, or the search path isn't set up
13475 correctly to find the file. */
13477 if (dwarf_read_debug
)
13479 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13480 kind
, dwo_name
, hex_string (signature
));
13483 /* This is a warning and not a complaint because it can be caused by
13484 pilot error (e.g., user accidentally deleting the DWO). */
13486 /* Print the name of the DWP file if we looked there, helps the user
13487 better diagnose the problem. */
13488 std::string dwp_text
;
13490 if (dwp_file
!= NULL
)
13491 dwp_text
= string_printf (" [in DWP file %s]",
13492 lbasename (dwp_file
->name
));
13494 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13495 " [in module %s]"),
13496 kind
, dwo_name
, hex_string (signature
),
13498 this_unit
->is_debug_types
? "TU" : "CU",
13499 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13504 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13505 See lookup_dwo_cutu_unit for details. */
13507 static struct dwo_unit
*
13508 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13509 const char *dwo_name
, const char *comp_dir
,
13510 ULONGEST signature
)
13512 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13515 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13516 See lookup_dwo_cutu_unit for details. */
13518 static struct dwo_unit
*
13519 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13520 const char *dwo_name
, const char *comp_dir
)
13522 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13525 /* Traversal function for queue_and_load_all_dwo_tus. */
13528 queue_and_load_dwo_tu (void **slot
, void *info
)
13530 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13531 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13532 ULONGEST signature
= dwo_unit
->signature
;
13533 struct signatured_type
*sig_type
=
13534 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13536 if (sig_type
!= NULL
)
13538 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13540 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13541 a real dependency of PER_CU on SIG_TYPE. That is detected later
13542 while processing PER_CU. */
13543 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13544 load_full_type_unit (sig_cu
);
13545 per_cu
->imported_symtabs_push (sig_cu
);
13551 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13552 The DWO may have the only definition of the type, though it may not be
13553 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13554 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13557 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13559 struct dwo_unit
*dwo_unit
;
13560 struct dwo_file
*dwo_file
;
13562 gdb_assert (!per_cu
->is_debug_types
);
13563 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13564 gdb_assert (per_cu
->cu
!= NULL
);
13566 dwo_unit
= per_cu
->cu
->dwo_unit
;
13567 gdb_assert (dwo_unit
!= NULL
);
13569 dwo_file
= dwo_unit
->dwo_file
;
13570 if (dwo_file
->tus
!= NULL
)
13571 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13574 /* Read in various DIEs. */
13576 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13577 Inherit only the children of the DW_AT_abstract_origin DIE not being
13578 already referenced by DW_AT_abstract_origin from the children of the
13582 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13584 struct die_info
*child_die
;
13585 sect_offset
*offsetp
;
13586 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13587 struct die_info
*origin_die
;
13588 /* Iterator of the ORIGIN_DIE children. */
13589 struct die_info
*origin_child_die
;
13590 struct attribute
*attr
;
13591 struct dwarf2_cu
*origin_cu
;
13592 struct pending
**origin_previous_list_in_scope
;
13594 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13598 /* Note that following die references may follow to a die in a
13602 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13604 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13606 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13607 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13609 if (die
->tag
!= origin_die
->tag
13610 && !(die
->tag
== DW_TAG_inlined_subroutine
13611 && origin_die
->tag
== DW_TAG_subprogram
))
13612 complaint (_("DIE %s and its abstract origin %s have different tags"),
13613 sect_offset_str (die
->sect_off
),
13614 sect_offset_str (origin_die
->sect_off
));
13616 std::vector
<sect_offset
> offsets
;
13618 for (child_die
= die
->child
;
13619 child_die
&& child_die
->tag
;
13620 child_die
= sibling_die (child_die
))
13622 struct die_info
*child_origin_die
;
13623 struct dwarf2_cu
*child_origin_cu
;
13625 /* We are trying to process concrete instance entries:
13626 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13627 it's not relevant to our analysis here. i.e. detecting DIEs that are
13628 present in the abstract instance but not referenced in the concrete
13630 if (child_die
->tag
== DW_TAG_call_site
13631 || child_die
->tag
== DW_TAG_GNU_call_site
)
13634 /* For each CHILD_DIE, find the corresponding child of
13635 ORIGIN_DIE. If there is more than one layer of
13636 DW_AT_abstract_origin, follow them all; there shouldn't be,
13637 but GCC versions at least through 4.4 generate this (GCC PR
13639 child_origin_die
= child_die
;
13640 child_origin_cu
= cu
;
13643 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13647 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13651 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13652 counterpart may exist. */
13653 if (child_origin_die
!= child_die
)
13655 if (child_die
->tag
!= child_origin_die
->tag
13656 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13657 && child_origin_die
->tag
== DW_TAG_subprogram
))
13658 complaint (_("Child DIE %s and its abstract origin %s have "
13660 sect_offset_str (child_die
->sect_off
),
13661 sect_offset_str (child_origin_die
->sect_off
));
13662 if (child_origin_die
->parent
!= origin_die
)
13663 complaint (_("Child DIE %s and its abstract origin %s have "
13664 "different parents"),
13665 sect_offset_str (child_die
->sect_off
),
13666 sect_offset_str (child_origin_die
->sect_off
));
13668 offsets
.push_back (child_origin_die
->sect_off
);
13671 std::sort (offsets
.begin (), offsets
.end ());
13672 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13673 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13674 if (offsetp
[-1] == *offsetp
)
13675 complaint (_("Multiple children of DIE %s refer "
13676 "to DIE %s as their abstract origin"),
13677 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13679 offsetp
= offsets
.data ();
13680 origin_child_die
= origin_die
->child
;
13681 while (origin_child_die
&& origin_child_die
->tag
)
13683 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13684 while (offsetp
< offsets_end
13685 && *offsetp
< origin_child_die
->sect_off
)
13687 if (offsetp
>= offsets_end
13688 || *offsetp
> origin_child_die
->sect_off
)
13690 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13691 Check whether we're already processing ORIGIN_CHILD_DIE.
13692 This can happen with mutually referenced abstract_origins.
13694 if (!origin_child_die
->in_process
)
13695 process_die (origin_child_die
, origin_cu
);
13697 origin_child_die
= sibling_die (origin_child_die
);
13699 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13701 if (cu
!= origin_cu
)
13702 compute_delayed_physnames (origin_cu
);
13706 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13708 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13709 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13710 struct context_stack
*newobj
;
13713 struct die_info
*child_die
;
13714 struct attribute
*attr
, *call_line
, *call_file
;
13716 CORE_ADDR baseaddr
;
13717 struct block
*block
;
13718 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13719 std::vector
<struct symbol
*> template_args
;
13720 struct template_symbol
*templ_func
= NULL
;
13724 /* If we do not have call site information, we can't show the
13725 caller of this inlined function. That's too confusing, so
13726 only use the scope for local variables. */
13727 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13728 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13729 if (call_line
== NULL
|| call_file
== NULL
)
13731 read_lexical_block_scope (die
, cu
);
13736 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13738 name
= dwarf2_name (die
, cu
);
13740 /* Ignore functions with missing or empty names. These are actually
13741 illegal according to the DWARF standard. */
13744 complaint (_("missing name for subprogram DIE at %s"),
13745 sect_offset_str (die
->sect_off
));
13749 /* Ignore functions with missing or invalid low and high pc attributes. */
13750 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13751 <= PC_BOUNDS_INVALID
)
13753 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13754 if (!attr
|| !DW_UNSND (attr
))
13755 complaint (_("cannot get low and high bounds "
13756 "for subprogram DIE at %s"),
13757 sect_offset_str (die
->sect_off
));
13761 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13762 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13764 /* If we have any template arguments, then we must allocate a
13765 different sort of symbol. */
13766 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13768 if (child_die
->tag
== DW_TAG_template_type_param
13769 || child_die
->tag
== DW_TAG_template_value_param
)
13771 templ_func
= allocate_template_symbol (objfile
);
13772 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13777 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13778 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13779 (struct symbol
*) templ_func
);
13781 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13782 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13785 /* If there is a location expression for DW_AT_frame_base, record
13787 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13788 if (attr
!= nullptr)
13789 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13791 /* If there is a location for the static link, record it. */
13792 newobj
->static_link
= NULL
;
13793 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13794 if (attr
!= nullptr)
13796 newobj
->static_link
13797 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13798 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13799 dwarf2_per_cu_addr_type (cu
->per_cu
));
13802 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13804 if (die
->child
!= NULL
)
13806 child_die
= die
->child
;
13807 while (child_die
&& child_die
->tag
)
13809 if (child_die
->tag
== DW_TAG_template_type_param
13810 || child_die
->tag
== DW_TAG_template_value_param
)
13812 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13815 template_args
.push_back (arg
);
13818 process_die (child_die
, cu
);
13819 child_die
= sibling_die (child_die
);
13823 inherit_abstract_dies (die
, cu
);
13825 /* If we have a DW_AT_specification, we might need to import using
13826 directives from the context of the specification DIE. See the
13827 comment in determine_prefix. */
13828 if (cu
->language
== language_cplus
13829 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13831 struct dwarf2_cu
*spec_cu
= cu
;
13832 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13836 child_die
= spec_die
->child
;
13837 while (child_die
&& child_die
->tag
)
13839 if (child_die
->tag
== DW_TAG_imported_module
)
13840 process_die (child_die
, spec_cu
);
13841 child_die
= sibling_die (child_die
);
13844 /* In some cases, GCC generates specification DIEs that
13845 themselves contain DW_AT_specification attributes. */
13846 spec_die
= die_specification (spec_die
, &spec_cu
);
13850 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13851 /* Make a block for the local symbols within. */
13852 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13853 cstk
.static_link
, lowpc
, highpc
);
13855 /* For C++, set the block's scope. */
13856 if ((cu
->language
== language_cplus
13857 || cu
->language
== language_fortran
13858 || cu
->language
== language_d
13859 || cu
->language
== language_rust
)
13860 && cu
->processing_has_namespace_info
)
13861 block_set_scope (block
, determine_prefix (die
, cu
),
13862 &objfile
->objfile_obstack
);
13864 /* If we have address ranges, record them. */
13865 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13867 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13869 /* Attach template arguments to function. */
13870 if (!template_args
.empty ())
13872 gdb_assert (templ_func
!= NULL
);
13874 templ_func
->n_template_arguments
= template_args
.size ();
13875 templ_func
->template_arguments
13876 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13877 templ_func
->n_template_arguments
);
13878 memcpy (templ_func
->template_arguments
,
13879 template_args
.data (),
13880 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13882 /* Make sure that the symtab is set on the new symbols. Even
13883 though they don't appear in this symtab directly, other parts
13884 of gdb assume that symbols do, and this is reasonably
13886 for (symbol
*sym
: template_args
)
13887 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13890 /* In C++, we can have functions nested inside functions (e.g., when
13891 a function declares a class that has methods). This means that
13892 when we finish processing a function scope, we may need to go
13893 back to building a containing block's symbol lists. */
13894 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13895 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13897 /* If we've finished processing a top-level function, subsequent
13898 symbols go in the file symbol list. */
13899 if (cu
->get_builder ()->outermost_context_p ())
13900 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13903 /* Process all the DIES contained within a lexical block scope. Start
13904 a new scope, process the dies, and then close the scope. */
13907 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13909 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13910 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13911 CORE_ADDR lowpc
, highpc
;
13912 struct die_info
*child_die
;
13913 CORE_ADDR baseaddr
;
13915 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13917 /* Ignore blocks with missing or invalid low and high pc attributes. */
13918 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13919 as multiple lexical blocks? Handling children in a sane way would
13920 be nasty. Might be easier to properly extend generic blocks to
13921 describe ranges. */
13922 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13924 case PC_BOUNDS_NOT_PRESENT
:
13925 /* DW_TAG_lexical_block has no attributes, process its children as if
13926 there was no wrapping by that DW_TAG_lexical_block.
13927 GCC does no longer produces such DWARF since GCC r224161. */
13928 for (child_die
= die
->child
;
13929 child_die
!= NULL
&& child_die
->tag
;
13930 child_die
= sibling_die (child_die
))
13931 process_die (child_die
, cu
);
13933 case PC_BOUNDS_INVALID
:
13936 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13937 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13939 cu
->get_builder ()->push_context (0, lowpc
);
13940 if (die
->child
!= NULL
)
13942 child_die
= die
->child
;
13943 while (child_die
&& child_die
->tag
)
13945 process_die (child_die
, cu
);
13946 child_die
= sibling_die (child_die
);
13949 inherit_abstract_dies (die
, cu
);
13950 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13952 if (*cu
->get_builder ()->get_local_symbols () != NULL
13953 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13955 struct block
*block
13956 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13957 cstk
.start_addr
, highpc
);
13959 /* Note that recording ranges after traversing children, as we
13960 do here, means that recording a parent's ranges entails
13961 walking across all its children's ranges as they appear in
13962 the address map, which is quadratic behavior.
13964 It would be nicer to record the parent's ranges before
13965 traversing its children, simply overriding whatever you find
13966 there. But since we don't even decide whether to create a
13967 block until after we've traversed its children, that's hard
13969 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13971 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13972 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13975 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13978 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13980 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13981 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13982 CORE_ADDR pc
, baseaddr
;
13983 struct attribute
*attr
;
13984 struct call_site
*call_site
, call_site_local
;
13987 struct die_info
*child_die
;
13989 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13991 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13994 /* This was a pre-DWARF-5 GNU extension alias
13995 for DW_AT_call_return_pc. */
13996 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14000 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
14001 "DIE %s [in module %s]"),
14002 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14005 pc
= attr_value_as_address (attr
) + baseaddr
;
14006 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
14008 if (cu
->call_site_htab
== NULL
)
14009 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
14010 NULL
, &objfile
->objfile_obstack
,
14011 hashtab_obstack_allocate
, NULL
);
14012 call_site_local
.pc
= pc
;
14013 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
14016 complaint (_("Duplicate PC %s for DW_TAG_call_site "
14017 "DIE %s [in module %s]"),
14018 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
14019 objfile_name (objfile
));
14023 /* Count parameters at the caller. */
14026 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
14027 child_die
= sibling_die (child_die
))
14029 if (child_die
->tag
!= DW_TAG_call_site_parameter
14030 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14032 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
14033 "DW_TAG_call_site child DIE %s [in module %s]"),
14034 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
14035 objfile_name (objfile
));
14043 = ((struct call_site
*)
14044 obstack_alloc (&objfile
->objfile_obstack
,
14045 sizeof (*call_site
)
14046 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
14048 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
14049 call_site
->pc
= pc
;
14051 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14052 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14054 struct die_info
*func_die
;
14056 /* Skip also over DW_TAG_inlined_subroutine. */
14057 for (func_die
= die
->parent
;
14058 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14059 && func_die
->tag
!= DW_TAG_subroutine_type
;
14060 func_die
= func_die
->parent
);
14062 /* DW_AT_call_all_calls is a superset
14063 of DW_AT_call_all_tail_calls. */
14065 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14066 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14067 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14068 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14070 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14071 not complete. But keep CALL_SITE for look ups via call_site_htab,
14072 both the initial caller containing the real return address PC and
14073 the final callee containing the current PC of a chain of tail
14074 calls do not need to have the tail call list complete. But any
14075 function candidate for a virtual tail call frame searched via
14076 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14077 determined unambiguously. */
14081 struct type
*func_type
= NULL
;
14084 func_type
= get_die_type (func_die
, cu
);
14085 if (func_type
!= NULL
)
14087 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14089 /* Enlist this call site to the function. */
14090 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14091 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14094 complaint (_("Cannot find function owning DW_TAG_call_site "
14095 "DIE %s [in module %s]"),
14096 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14100 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14102 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14104 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14107 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14108 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14110 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14111 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14112 /* Keep NULL DWARF_BLOCK. */;
14113 else if (attr_form_is_block (attr
))
14115 struct dwarf2_locexpr_baton
*dlbaton
;
14117 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14118 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14119 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14120 dlbaton
->per_cu
= cu
->per_cu
;
14122 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14124 else if (attr_form_is_ref (attr
))
14126 struct dwarf2_cu
*target_cu
= cu
;
14127 struct die_info
*target_die
;
14129 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14130 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14131 if (die_is_declaration (target_die
, target_cu
))
14133 const char *target_physname
;
14135 /* Prefer the mangled name; otherwise compute the demangled one. */
14136 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14137 if (target_physname
== NULL
)
14138 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14139 if (target_physname
== NULL
)
14140 complaint (_("DW_AT_call_target target DIE has invalid "
14141 "physname, for referencing DIE %s [in module %s]"),
14142 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14144 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14150 /* DW_AT_entry_pc should be preferred. */
14151 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14152 <= PC_BOUNDS_INVALID
)
14153 complaint (_("DW_AT_call_target target DIE has invalid "
14154 "low pc, for referencing DIE %s [in module %s]"),
14155 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14158 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14159 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14164 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14165 "block nor reference, for DIE %s [in module %s]"),
14166 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14168 call_site
->per_cu
= cu
->per_cu
;
14170 for (child_die
= die
->child
;
14171 child_die
&& child_die
->tag
;
14172 child_die
= sibling_die (child_die
))
14174 struct call_site_parameter
*parameter
;
14175 struct attribute
*loc
, *origin
;
14177 if (child_die
->tag
!= DW_TAG_call_site_parameter
14178 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14180 /* Already printed the complaint above. */
14184 gdb_assert (call_site
->parameter_count
< nparams
);
14185 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14187 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14188 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14189 register is contained in DW_AT_call_value. */
14191 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14192 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14193 if (origin
== NULL
)
14195 /* This was a pre-DWARF-5 GNU extension alias
14196 for DW_AT_call_parameter. */
14197 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14199 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14201 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14203 sect_offset sect_off
14204 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14205 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14207 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14208 binding can be done only inside one CU. Such referenced DIE
14209 therefore cannot be even moved to DW_TAG_partial_unit. */
14210 complaint (_("DW_AT_call_parameter offset is not in CU for "
14211 "DW_TAG_call_site child DIE %s [in module %s]"),
14212 sect_offset_str (child_die
->sect_off
),
14213 objfile_name (objfile
));
14216 parameter
->u
.param_cu_off
14217 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14219 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14221 complaint (_("No DW_FORM_block* DW_AT_location for "
14222 "DW_TAG_call_site child DIE %s [in module %s]"),
14223 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14228 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14229 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14230 if (parameter
->u
.dwarf_reg
!= -1)
14231 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14232 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14233 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14234 ¶meter
->u
.fb_offset
))
14235 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14238 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14239 "for DW_FORM_block* DW_AT_location is supported for "
14240 "DW_TAG_call_site child DIE %s "
14242 sect_offset_str (child_die
->sect_off
),
14243 objfile_name (objfile
));
14248 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14250 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14251 if (!attr_form_is_block (attr
))
14253 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14254 "DW_TAG_call_site child DIE %s [in module %s]"),
14255 sect_offset_str (child_die
->sect_off
),
14256 objfile_name (objfile
));
14259 parameter
->value
= DW_BLOCK (attr
)->data
;
14260 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14262 /* Parameters are not pre-cleared by memset above. */
14263 parameter
->data_value
= NULL
;
14264 parameter
->data_value_size
= 0;
14265 call_site
->parameter_count
++;
14267 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14269 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14270 if (attr
!= nullptr)
14272 if (!attr_form_is_block (attr
))
14273 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14274 "DW_TAG_call_site child DIE %s [in module %s]"),
14275 sect_offset_str (child_die
->sect_off
),
14276 objfile_name (objfile
));
14279 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14280 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14286 /* Helper function for read_variable. If DIE represents a virtual
14287 table, then return the type of the concrete object that is
14288 associated with the virtual table. Otherwise, return NULL. */
14290 static struct type
*
14291 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14293 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14297 /* Find the type DIE. */
14298 struct die_info
*type_die
= NULL
;
14299 struct dwarf2_cu
*type_cu
= cu
;
14301 if (attr_form_is_ref (attr
))
14302 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14303 if (type_die
== NULL
)
14306 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14308 return die_containing_type (type_die
, type_cu
);
14311 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14314 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14316 struct rust_vtable_symbol
*storage
= NULL
;
14318 if (cu
->language
== language_rust
)
14320 struct type
*containing_type
= rust_containing_type (die
, cu
);
14322 if (containing_type
!= NULL
)
14324 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14326 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
14327 initialize_objfile_symbol (storage
);
14328 storage
->concrete_type
= containing_type
;
14329 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14333 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14334 struct attribute
*abstract_origin
14335 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14336 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14337 if (res
== NULL
&& loc
&& abstract_origin
)
14339 /* We have a variable without a name, but with a location and an abstract
14340 origin. This may be a concrete instance of an abstract variable
14341 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14343 struct dwarf2_cu
*origin_cu
= cu
;
14344 struct die_info
*origin_die
14345 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14346 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
14347 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
14351 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14352 reading .debug_rnglists.
14353 Callback's type should be:
14354 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14355 Return true if the attributes are present and valid, otherwise,
14358 template <typename Callback
>
14360 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14361 Callback
&&callback
)
14363 struct dwarf2_per_objfile
*dwarf2_per_objfile
14364 = cu
->per_cu
->dwarf2_per_objfile
;
14365 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14366 bfd
*obfd
= objfile
->obfd
;
14367 /* Base address selection entry. */
14370 const gdb_byte
*buffer
;
14371 CORE_ADDR baseaddr
;
14372 bool overflow
= false;
14374 found_base
= cu
->base_known
;
14375 base
= cu
->base_address
;
14377 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14378 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14380 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14384 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14386 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14390 /* Initialize it due to a false compiler warning. */
14391 CORE_ADDR range_beginning
= 0, range_end
= 0;
14392 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14393 + dwarf2_per_objfile
->rnglists
.size
);
14394 unsigned int bytes_read
;
14396 if (buffer
== buf_end
)
14401 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14404 case DW_RLE_end_of_list
:
14406 case DW_RLE_base_address
:
14407 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14412 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14414 buffer
+= bytes_read
;
14416 case DW_RLE_start_length
:
14417 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14422 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14423 buffer
+= bytes_read
;
14424 range_end
= (range_beginning
14425 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14426 buffer
+= bytes_read
;
14427 if (buffer
> buf_end
)
14433 case DW_RLE_offset_pair
:
14434 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14435 buffer
+= bytes_read
;
14436 if (buffer
> buf_end
)
14441 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14442 buffer
+= bytes_read
;
14443 if (buffer
> buf_end
)
14449 case DW_RLE_start_end
:
14450 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14455 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14456 buffer
+= bytes_read
;
14457 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14458 buffer
+= bytes_read
;
14461 complaint (_("Invalid .debug_rnglists data (no base address)"));
14464 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14466 if (rlet
== DW_RLE_base_address
)
14471 /* We have no valid base address for the ranges
14473 complaint (_("Invalid .debug_rnglists data (no base address)"));
14477 if (range_beginning
> range_end
)
14479 /* Inverted range entries are invalid. */
14480 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14484 /* Empty range entries have no effect. */
14485 if (range_beginning
== range_end
)
14488 range_beginning
+= base
;
14491 /* A not-uncommon case of bad debug info.
14492 Don't pollute the addrmap with bad data. */
14493 if (range_beginning
+ baseaddr
== 0
14494 && !dwarf2_per_objfile
->has_section_at_zero
)
14496 complaint (_(".debug_rnglists entry has start address of zero"
14497 " [in module %s]"), objfile_name (objfile
));
14501 callback (range_beginning
, range_end
);
14506 complaint (_("Offset %d is not terminated "
14507 "for DW_AT_ranges attribute"),
14515 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14516 Callback's type should be:
14517 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14518 Return 1 if the attributes are present and valid, otherwise, return 0. */
14520 template <typename Callback
>
14522 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14523 Callback
&&callback
)
14525 struct dwarf2_per_objfile
*dwarf2_per_objfile
14526 = cu
->per_cu
->dwarf2_per_objfile
;
14527 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14528 struct comp_unit_head
*cu_header
= &cu
->header
;
14529 bfd
*obfd
= objfile
->obfd
;
14530 unsigned int addr_size
= cu_header
->addr_size
;
14531 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14532 /* Base address selection entry. */
14535 unsigned int dummy
;
14536 const gdb_byte
*buffer
;
14537 CORE_ADDR baseaddr
;
14539 if (cu_header
->version
>= 5)
14540 return dwarf2_rnglists_process (offset
, cu
, callback
);
14542 found_base
= cu
->base_known
;
14543 base
= cu
->base_address
;
14545 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14546 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14548 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14552 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14554 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14558 CORE_ADDR range_beginning
, range_end
;
14560 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14561 buffer
+= addr_size
;
14562 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14563 buffer
+= addr_size
;
14564 offset
+= 2 * addr_size
;
14566 /* An end of list marker is a pair of zero addresses. */
14567 if (range_beginning
== 0 && range_end
== 0)
14568 /* Found the end of list entry. */
14571 /* Each base address selection entry is a pair of 2 values.
14572 The first is the largest possible address, the second is
14573 the base address. Check for a base address here. */
14574 if ((range_beginning
& mask
) == mask
)
14576 /* If we found the largest possible address, then we already
14577 have the base address in range_end. */
14585 /* We have no valid base address for the ranges
14587 complaint (_("Invalid .debug_ranges data (no base address)"));
14591 if (range_beginning
> range_end
)
14593 /* Inverted range entries are invalid. */
14594 complaint (_("Invalid .debug_ranges data (inverted range)"));
14598 /* Empty range entries have no effect. */
14599 if (range_beginning
== range_end
)
14602 range_beginning
+= base
;
14605 /* A not-uncommon case of bad debug info.
14606 Don't pollute the addrmap with bad data. */
14607 if (range_beginning
+ baseaddr
== 0
14608 && !dwarf2_per_objfile
->has_section_at_zero
)
14610 complaint (_(".debug_ranges entry has start address of zero"
14611 " [in module %s]"), objfile_name (objfile
));
14615 callback (range_beginning
, range_end
);
14621 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14622 Return 1 if the attributes are present and valid, otherwise, return 0.
14623 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14626 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14627 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14628 struct partial_symtab
*ranges_pst
)
14630 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14631 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14632 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14633 SECT_OFF_TEXT (objfile
));
14636 CORE_ADDR high
= 0;
14639 retval
= dwarf2_ranges_process (offset
, cu
,
14640 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14642 if (ranges_pst
!= NULL
)
14647 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14648 range_beginning
+ baseaddr
)
14650 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14651 range_end
+ baseaddr
)
14653 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14654 lowpc
, highpc
- 1, ranges_pst
);
14657 /* FIXME: This is recording everything as a low-high
14658 segment of consecutive addresses. We should have a
14659 data structure for discontiguous block ranges
14663 low
= range_beginning
;
14669 if (range_beginning
< low
)
14670 low
= range_beginning
;
14671 if (range_end
> high
)
14679 /* If the first entry is an end-of-list marker, the range
14680 describes an empty scope, i.e. no instructions. */
14686 *high_return
= high
;
14690 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14691 definition for the return value. *LOWPC and *HIGHPC are set iff
14692 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14694 static enum pc_bounds_kind
14695 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14696 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14697 struct partial_symtab
*pst
)
14699 struct dwarf2_per_objfile
*dwarf2_per_objfile
14700 = cu
->per_cu
->dwarf2_per_objfile
;
14701 struct attribute
*attr
;
14702 struct attribute
*attr_high
;
14704 CORE_ADDR high
= 0;
14705 enum pc_bounds_kind ret
;
14707 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14710 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14711 if (attr
!= nullptr)
14713 low
= attr_value_as_address (attr
);
14714 high
= attr_value_as_address (attr_high
);
14715 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14719 /* Found high w/o low attribute. */
14720 return PC_BOUNDS_INVALID
;
14722 /* Found consecutive range of addresses. */
14723 ret
= PC_BOUNDS_HIGH_LOW
;
14727 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14730 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14731 We take advantage of the fact that DW_AT_ranges does not appear
14732 in DW_TAG_compile_unit of DWO files. */
14733 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14734 unsigned int ranges_offset
= (DW_UNSND (attr
)
14735 + (need_ranges_base
14739 /* Value of the DW_AT_ranges attribute is the offset in the
14740 .debug_ranges section. */
14741 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14742 return PC_BOUNDS_INVALID
;
14743 /* Found discontinuous range of addresses. */
14744 ret
= PC_BOUNDS_RANGES
;
14747 return PC_BOUNDS_NOT_PRESENT
;
14750 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14752 return PC_BOUNDS_INVALID
;
14754 /* When using the GNU linker, .gnu.linkonce. sections are used to
14755 eliminate duplicate copies of functions and vtables and such.
14756 The linker will arbitrarily choose one and discard the others.
14757 The AT_*_pc values for such functions refer to local labels in
14758 these sections. If the section from that file was discarded, the
14759 labels are not in the output, so the relocs get a value of 0.
14760 If this is a discarded function, mark the pc bounds as invalid,
14761 so that GDB will ignore it. */
14762 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14763 return PC_BOUNDS_INVALID
;
14771 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14772 its low and high PC addresses. Do nothing if these addresses could not
14773 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14774 and HIGHPC to the high address if greater than HIGHPC. */
14777 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14778 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14779 struct dwarf2_cu
*cu
)
14781 CORE_ADDR low
, high
;
14782 struct die_info
*child
= die
->child
;
14784 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14786 *lowpc
= std::min (*lowpc
, low
);
14787 *highpc
= std::max (*highpc
, high
);
14790 /* If the language does not allow nested subprograms (either inside
14791 subprograms or lexical blocks), we're done. */
14792 if (cu
->language
!= language_ada
)
14795 /* Check all the children of the given DIE. If it contains nested
14796 subprograms, then check their pc bounds. Likewise, we need to
14797 check lexical blocks as well, as they may also contain subprogram
14799 while (child
&& child
->tag
)
14801 if (child
->tag
== DW_TAG_subprogram
14802 || child
->tag
== DW_TAG_lexical_block
)
14803 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14804 child
= sibling_die (child
);
14808 /* Get the low and high pc's represented by the scope DIE, and store
14809 them in *LOWPC and *HIGHPC. If the correct values can't be
14810 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14813 get_scope_pc_bounds (struct die_info
*die
,
14814 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14815 struct dwarf2_cu
*cu
)
14817 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14818 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14819 CORE_ADDR current_low
, current_high
;
14821 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14822 >= PC_BOUNDS_RANGES
)
14824 best_low
= current_low
;
14825 best_high
= current_high
;
14829 struct die_info
*child
= die
->child
;
14831 while (child
&& child
->tag
)
14833 switch (child
->tag
) {
14834 case DW_TAG_subprogram
:
14835 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14837 case DW_TAG_namespace
:
14838 case DW_TAG_module
:
14839 /* FIXME: carlton/2004-01-16: Should we do this for
14840 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14841 that current GCC's always emit the DIEs corresponding
14842 to definitions of methods of classes as children of a
14843 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14844 the DIEs giving the declarations, which could be
14845 anywhere). But I don't see any reason why the
14846 standards says that they have to be there. */
14847 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14849 if (current_low
!= ((CORE_ADDR
) -1))
14851 best_low
= std::min (best_low
, current_low
);
14852 best_high
= std::max (best_high
, current_high
);
14860 child
= sibling_die (child
);
14865 *highpc
= best_high
;
14868 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14872 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14873 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14875 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14876 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14877 struct attribute
*attr
;
14878 struct attribute
*attr_high
;
14880 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14883 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14884 if (attr
!= nullptr)
14886 CORE_ADDR low
= attr_value_as_address (attr
);
14887 CORE_ADDR high
= attr_value_as_address (attr_high
);
14889 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14892 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14893 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14894 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14898 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14899 if (attr
!= nullptr)
14901 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14902 We take advantage of the fact that DW_AT_ranges does not appear
14903 in DW_TAG_compile_unit of DWO files. */
14904 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14906 /* The value of the DW_AT_ranges attribute is the offset of the
14907 address range list in the .debug_ranges section. */
14908 unsigned long offset
= (DW_UNSND (attr
)
14909 + (need_ranges_base
? cu
->ranges_base
: 0));
14911 std::vector
<blockrange
> blockvec
;
14912 dwarf2_ranges_process (offset
, cu
,
14913 [&] (CORE_ADDR start
, CORE_ADDR end
)
14917 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14918 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14919 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14920 blockvec
.emplace_back (start
, end
);
14923 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14927 /* Check whether the producer field indicates either of GCC < 4.6, or the
14928 Intel C/C++ compiler, and cache the result in CU. */
14931 check_producer (struct dwarf2_cu
*cu
)
14935 if (cu
->producer
== NULL
)
14937 /* For unknown compilers expect their behavior is DWARF version
14940 GCC started to support .debug_types sections by -gdwarf-4 since
14941 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14942 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14943 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14944 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14946 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14948 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14949 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14951 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14953 cu
->producer_is_icc
= true;
14954 cu
->producer_is_icc_lt_14
= major
< 14;
14956 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14957 cu
->producer_is_codewarrior
= true;
14960 /* For other non-GCC compilers, expect their behavior is DWARF version
14964 cu
->checked_producer
= true;
14967 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14968 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14969 during 4.6.0 experimental. */
14972 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14974 if (!cu
->checked_producer
)
14975 check_producer (cu
);
14977 return cu
->producer_is_gxx_lt_4_6
;
14981 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14982 with incorrect is_stmt attributes. */
14985 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14987 if (!cu
->checked_producer
)
14988 check_producer (cu
);
14990 return cu
->producer_is_codewarrior
;
14993 /* Return the default accessibility type if it is not overridden by
14994 DW_AT_accessibility. */
14996 static enum dwarf_access_attribute
14997 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14999 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
15001 /* The default DWARF 2 accessibility for members is public, the default
15002 accessibility for inheritance is private. */
15004 if (die
->tag
!= DW_TAG_inheritance
)
15005 return DW_ACCESS_public
;
15007 return DW_ACCESS_private
;
15011 /* DWARF 3+ defines the default accessibility a different way. The same
15012 rules apply now for DW_TAG_inheritance as for the members and it only
15013 depends on the container kind. */
15015 if (die
->parent
->tag
== DW_TAG_class_type
)
15016 return DW_ACCESS_private
;
15018 return DW_ACCESS_public
;
15022 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
15023 offset. If the attribute was not found return 0, otherwise return
15024 1. If it was found but could not properly be handled, set *OFFSET
15028 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
15031 struct attribute
*attr
;
15033 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
15038 /* Note that we do not check for a section offset first here.
15039 This is because DW_AT_data_member_location is new in DWARF 4,
15040 so if we see it, we can assume that a constant form is really
15041 a constant and not a section offset. */
15042 if (attr_form_is_constant (attr
))
15043 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
15044 else if (attr_form_is_section_offset (attr
))
15045 dwarf2_complex_location_expr_complaint ();
15046 else if (attr_form_is_block (attr
))
15047 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15049 dwarf2_complex_location_expr_complaint ();
15057 /* Add an aggregate field to the field list. */
15060 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15061 struct dwarf2_cu
*cu
)
15063 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15064 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15065 struct nextfield
*new_field
;
15066 struct attribute
*attr
;
15068 const char *fieldname
= "";
15070 if (die
->tag
== DW_TAG_inheritance
)
15072 fip
->baseclasses
.emplace_back ();
15073 new_field
= &fip
->baseclasses
.back ();
15077 fip
->fields
.emplace_back ();
15078 new_field
= &fip
->fields
.back ();
15083 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15084 if (attr
!= nullptr)
15085 new_field
->accessibility
= DW_UNSND (attr
);
15087 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15088 if (new_field
->accessibility
!= DW_ACCESS_public
)
15089 fip
->non_public_fields
= 1;
15091 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15092 if (attr
!= nullptr)
15093 new_field
->virtuality
= DW_UNSND (attr
);
15095 new_field
->virtuality
= DW_VIRTUALITY_none
;
15097 fp
= &new_field
->field
;
15099 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15103 /* Data member other than a C++ static data member. */
15105 /* Get type of field. */
15106 fp
->type
= die_type (die
, cu
);
15108 SET_FIELD_BITPOS (*fp
, 0);
15110 /* Get bit size of field (zero if none). */
15111 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15112 if (attr
!= nullptr)
15114 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15118 FIELD_BITSIZE (*fp
) = 0;
15121 /* Get bit offset of field. */
15122 if (handle_data_member_location (die
, cu
, &offset
))
15123 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15124 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15125 if (attr
!= nullptr)
15127 if (gdbarch_bits_big_endian (gdbarch
))
15129 /* For big endian bits, the DW_AT_bit_offset gives the
15130 additional bit offset from the MSB of the containing
15131 anonymous object to the MSB of the field. We don't
15132 have to do anything special since we don't need to
15133 know the size of the anonymous object. */
15134 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15138 /* For little endian bits, compute the bit offset to the
15139 MSB of the anonymous object, subtract off the number of
15140 bits from the MSB of the field to the MSB of the
15141 object, and then subtract off the number of bits of
15142 the field itself. The result is the bit offset of
15143 the LSB of the field. */
15144 int anonymous_size
;
15145 int bit_offset
= DW_UNSND (attr
);
15147 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15148 if (attr
!= nullptr)
15150 /* The size of the anonymous object containing
15151 the bit field is explicit, so use the
15152 indicated size (in bytes). */
15153 anonymous_size
= DW_UNSND (attr
);
15157 /* The size of the anonymous object containing
15158 the bit field must be inferred from the type
15159 attribute of the data member containing the
15161 anonymous_size
= TYPE_LENGTH (fp
->type
);
15163 SET_FIELD_BITPOS (*fp
,
15164 (FIELD_BITPOS (*fp
)
15165 + anonymous_size
* bits_per_byte
15166 - bit_offset
- FIELD_BITSIZE (*fp
)));
15169 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15171 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15172 + dwarf2_get_attr_constant_value (attr
, 0)));
15174 /* Get name of field. */
15175 fieldname
= dwarf2_name (die
, cu
);
15176 if (fieldname
== NULL
)
15179 /* The name is already allocated along with this objfile, so we don't
15180 need to duplicate it for the type. */
15181 fp
->name
= fieldname
;
15183 /* Change accessibility for artificial fields (e.g. virtual table
15184 pointer or virtual base class pointer) to private. */
15185 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15187 FIELD_ARTIFICIAL (*fp
) = 1;
15188 new_field
->accessibility
= DW_ACCESS_private
;
15189 fip
->non_public_fields
= 1;
15192 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15194 /* C++ static member. */
15196 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15197 is a declaration, but all versions of G++ as of this writing
15198 (so through at least 3.2.1) incorrectly generate
15199 DW_TAG_variable tags. */
15201 const char *physname
;
15203 /* Get name of field. */
15204 fieldname
= dwarf2_name (die
, cu
);
15205 if (fieldname
== NULL
)
15208 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15210 /* Only create a symbol if this is an external value.
15211 new_symbol checks this and puts the value in the global symbol
15212 table, which we want. If it is not external, new_symbol
15213 will try to put the value in cu->list_in_scope which is wrong. */
15214 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15216 /* A static const member, not much different than an enum as far as
15217 we're concerned, except that we can support more types. */
15218 new_symbol (die
, NULL
, cu
);
15221 /* Get physical name. */
15222 physname
= dwarf2_physname (fieldname
, die
, cu
);
15224 /* The name is already allocated along with this objfile, so we don't
15225 need to duplicate it for the type. */
15226 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15227 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15228 FIELD_NAME (*fp
) = fieldname
;
15230 else if (die
->tag
== DW_TAG_inheritance
)
15234 /* C++ base class field. */
15235 if (handle_data_member_location (die
, cu
, &offset
))
15236 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15237 FIELD_BITSIZE (*fp
) = 0;
15238 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15239 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15241 else if (die
->tag
== DW_TAG_variant_part
)
15243 /* process_structure_scope will treat this DIE as a union. */
15244 process_structure_scope (die
, cu
);
15246 /* The variant part is relative to the start of the enclosing
15248 SET_FIELD_BITPOS (*fp
, 0);
15249 fp
->type
= get_die_type (die
, cu
);
15250 fp
->artificial
= 1;
15251 fp
->name
= "<<variant>>";
15253 /* Normally a DW_TAG_variant_part won't have a size, but our
15254 representation requires one, so set it to the maximum of the
15255 child sizes, being sure to account for the offset at which
15256 each child is seen. */
15257 if (TYPE_LENGTH (fp
->type
) == 0)
15260 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
15262 unsigned len
= ((TYPE_FIELD_BITPOS (fp
->type
, i
) + 7) / 8
15263 + TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)));
15267 TYPE_LENGTH (fp
->type
) = max
;
15271 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15274 /* Can the type given by DIE define another type? */
15277 type_can_define_types (const struct die_info
*die
)
15281 case DW_TAG_typedef
:
15282 case DW_TAG_class_type
:
15283 case DW_TAG_structure_type
:
15284 case DW_TAG_union_type
:
15285 case DW_TAG_enumeration_type
:
15293 /* Add a type definition defined in the scope of the FIP's class. */
15296 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15297 struct dwarf2_cu
*cu
)
15299 struct decl_field fp
;
15300 memset (&fp
, 0, sizeof (fp
));
15302 gdb_assert (type_can_define_types (die
));
15304 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15305 fp
.name
= dwarf2_name (die
, cu
);
15306 fp
.type
= read_type_die (die
, cu
);
15308 /* Save accessibility. */
15309 enum dwarf_access_attribute accessibility
;
15310 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15312 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15314 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15315 switch (accessibility
)
15317 case DW_ACCESS_public
:
15318 /* The assumed value if neither private nor protected. */
15320 case DW_ACCESS_private
:
15323 case DW_ACCESS_protected
:
15324 fp
.is_protected
= 1;
15327 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15330 if (die
->tag
== DW_TAG_typedef
)
15331 fip
->typedef_field_list
.push_back (fp
);
15333 fip
->nested_types_list
.push_back (fp
);
15336 /* Create the vector of fields, and attach it to the type. */
15339 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15340 struct dwarf2_cu
*cu
)
15342 int nfields
= fip
->nfields
;
15344 /* Record the field count, allocate space for the array of fields,
15345 and create blank accessibility bitfields if necessary. */
15346 TYPE_NFIELDS (type
) = nfields
;
15347 TYPE_FIELDS (type
) = (struct field
*)
15348 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15350 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15352 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15354 TYPE_FIELD_PRIVATE_BITS (type
) =
15355 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15356 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15358 TYPE_FIELD_PROTECTED_BITS (type
) =
15359 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15360 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15362 TYPE_FIELD_IGNORE_BITS (type
) =
15363 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15364 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15367 /* If the type has baseclasses, allocate and clear a bit vector for
15368 TYPE_FIELD_VIRTUAL_BITS. */
15369 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15371 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15372 unsigned char *pointer
;
15374 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15375 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15376 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15377 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15378 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15381 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15383 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15385 for (int index
= 0; index
< nfields
; ++index
)
15387 struct nextfield
&field
= fip
->fields
[index
];
15389 if (field
.variant
.is_discriminant
)
15390 di
->discriminant_index
= index
;
15391 else if (field
.variant
.default_branch
)
15392 di
->default_index
= index
;
15394 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15398 /* Copy the saved-up fields into the field vector. */
15399 for (int i
= 0; i
< nfields
; ++i
)
15401 struct nextfield
&field
15402 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15403 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15405 TYPE_FIELD (type
, i
) = field
.field
;
15406 switch (field
.accessibility
)
15408 case DW_ACCESS_private
:
15409 if (cu
->language
!= language_ada
)
15410 SET_TYPE_FIELD_PRIVATE (type
, i
);
15413 case DW_ACCESS_protected
:
15414 if (cu
->language
!= language_ada
)
15415 SET_TYPE_FIELD_PROTECTED (type
, i
);
15418 case DW_ACCESS_public
:
15422 /* Unknown accessibility. Complain and treat it as public. */
15424 complaint (_("unsupported accessibility %d"),
15425 field
.accessibility
);
15429 if (i
< fip
->baseclasses
.size ())
15431 switch (field
.virtuality
)
15433 case DW_VIRTUALITY_virtual
:
15434 case DW_VIRTUALITY_pure_virtual
:
15435 if (cu
->language
== language_ada
)
15436 error (_("unexpected virtuality in component of Ada type"));
15437 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15444 /* Return true if this member function is a constructor, false
15448 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15450 const char *fieldname
;
15451 const char *type_name
;
15454 if (die
->parent
== NULL
)
15457 if (die
->parent
->tag
!= DW_TAG_structure_type
15458 && die
->parent
->tag
!= DW_TAG_union_type
15459 && die
->parent
->tag
!= DW_TAG_class_type
)
15462 fieldname
= dwarf2_name (die
, cu
);
15463 type_name
= dwarf2_name (die
->parent
, cu
);
15464 if (fieldname
== NULL
|| type_name
== NULL
)
15467 len
= strlen (fieldname
);
15468 return (strncmp (fieldname
, type_name
, len
) == 0
15469 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15472 /* Add a member function to the proper fieldlist. */
15475 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15476 struct type
*type
, struct dwarf2_cu
*cu
)
15478 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15479 struct attribute
*attr
;
15481 struct fnfieldlist
*flp
= nullptr;
15482 struct fn_field
*fnp
;
15483 const char *fieldname
;
15484 struct type
*this_type
;
15485 enum dwarf_access_attribute accessibility
;
15487 if (cu
->language
== language_ada
)
15488 error (_("unexpected member function in Ada type"));
15490 /* Get name of member function. */
15491 fieldname
= dwarf2_name (die
, cu
);
15492 if (fieldname
== NULL
)
15495 /* Look up member function name in fieldlist. */
15496 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15498 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15500 flp
= &fip
->fnfieldlists
[i
];
15505 /* Create a new fnfieldlist if necessary. */
15506 if (flp
== nullptr)
15508 fip
->fnfieldlists
.emplace_back ();
15509 flp
= &fip
->fnfieldlists
.back ();
15510 flp
->name
= fieldname
;
15511 i
= fip
->fnfieldlists
.size () - 1;
15514 /* Create a new member function field and add it to the vector of
15516 flp
->fnfields
.emplace_back ();
15517 fnp
= &flp
->fnfields
.back ();
15519 /* Delay processing of the physname until later. */
15520 if (cu
->language
== language_cplus
)
15521 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15525 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15526 fnp
->physname
= physname
? physname
: "";
15529 fnp
->type
= alloc_type (objfile
);
15530 this_type
= read_type_die (die
, cu
);
15531 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15533 int nparams
= TYPE_NFIELDS (this_type
);
15535 /* TYPE is the domain of this method, and THIS_TYPE is the type
15536 of the method itself (TYPE_CODE_METHOD). */
15537 smash_to_method_type (fnp
->type
, type
,
15538 TYPE_TARGET_TYPE (this_type
),
15539 TYPE_FIELDS (this_type
),
15540 TYPE_NFIELDS (this_type
),
15541 TYPE_VARARGS (this_type
));
15543 /* Handle static member functions.
15544 Dwarf2 has no clean way to discern C++ static and non-static
15545 member functions. G++ helps GDB by marking the first
15546 parameter for non-static member functions (which is the this
15547 pointer) as artificial. We obtain this information from
15548 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15549 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15550 fnp
->voffset
= VOFFSET_STATIC
;
15553 complaint (_("member function type missing for '%s'"),
15554 dwarf2_full_name (fieldname
, die
, cu
));
15556 /* Get fcontext from DW_AT_containing_type if present. */
15557 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15558 fnp
->fcontext
= die_containing_type (die
, cu
);
15560 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15561 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15563 /* Get accessibility. */
15564 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15565 if (attr
!= nullptr)
15566 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15568 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15569 switch (accessibility
)
15571 case DW_ACCESS_private
:
15572 fnp
->is_private
= 1;
15574 case DW_ACCESS_protected
:
15575 fnp
->is_protected
= 1;
15579 /* Check for artificial methods. */
15580 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15581 if (attr
&& DW_UNSND (attr
) != 0)
15582 fnp
->is_artificial
= 1;
15584 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15586 /* Get index in virtual function table if it is a virtual member
15587 function. For older versions of GCC, this is an offset in the
15588 appropriate virtual table, as specified by DW_AT_containing_type.
15589 For everyone else, it is an expression to be evaluated relative
15590 to the object address. */
15592 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15593 if (attr
!= nullptr)
15595 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15597 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15599 /* Old-style GCC. */
15600 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15602 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15603 || (DW_BLOCK (attr
)->size
> 1
15604 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15605 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15607 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15608 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15609 dwarf2_complex_location_expr_complaint ();
15611 fnp
->voffset
/= cu
->header
.addr_size
;
15615 dwarf2_complex_location_expr_complaint ();
15617 if (!fnp
->fcontext
)
15619 /* If there is no `this' field and no DW_AT_containing_type,
15620 we cannot actually find a base class context for the
15622 if (TYPE_NFIELDS (this_type
) == 0
15623 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15625 complaint (_("cannot determine context for virtual member "
15626 "function \"%s\" (offset %s)"),
15627 fieldname
, sect_offset_str (die
->sect_off
));
15632 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15636 else if (attr_form_is_section_offset (attr
))
15638 dwarf2_complex_location_expr_complaint ();
15642 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15648 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15649 if (attr
&& DW_UNSND (attr
))
15651 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15652 complaint (_("Member function \"%s\" (offset %s) is virtual "
15653 "but the vtable offset is not specified"),
15654 fieldname
, sect_offset_str (die
->sect_off
));
15655 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15656 TYPE_CPLUS_DYNAMIC (type
) = 1;
15661 /* Create the vector of member function fields, and attach it to the type. */
15664 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15665 struct dwarf2_cu
*cu
)
15667 if (cu
->language
== language_ada
)
15668 error (_("unexpected member functions in Ada type"));
15670 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15671 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15673 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15675 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15677 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15678 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15680 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15681 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15682 fn_flp
->fn_fields
= (struct fn_field
*)
15683 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15685 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15686 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15689 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15692 /* Returns non-zero if NAME is the name of a vtable member in CU's
15693 language, zero otherwise. */
15695 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15697 static const char vptr
[] = "_vptr";
15699 /* Look for the C++ form of the vtable. */
15700 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15706 /* GCC outputs unnamed structures that are really pointers to member
15707 functions, with the ABI-specified layout. If TYPE describes
15708 such a structure, smash it into a member function type.
15710 GCC shouldn't do this; it should just output pointer to member DIEs.
15711 This is GCC PR debug/28767. */
15714 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15716 struct type
*pfn_type
, *self_type
, *new_type
;
15718 /* Check for a structure with no name and two children. */
15719 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15722 /* Check for __pfn and __delta members. */
15723 if (TYPE_FIELD_NAME (type
, 0) == NULL
15724 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15725 || TYPE_FIELD_NAME (type
, 1) == NULL
15726 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15729 /* Find the type of the method. */
15730 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15731 if (pfn_type
== NULL
15732 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15733 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15736 /* Look for the "this" argument. */
15737 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15738 if (TYPE_NFIELDS (pfn_type
) == 0
15739 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15740 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15743 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15744 new_type
= alloc_type (objfile
);
15745 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15746 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15747 TYPE_VARARGS (pfn_type
));
15748 smash_to_methodptr_type (type
, new_type
);
15751 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15752 appropriate error checking and issuing complaints if there is a
15756 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15758 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15760 if (attr
== nullptr)
15763 if (!attr_form_is_constant (attr
))
15765 complaint (_("DW_AT_alignment must have constant form"
15766 " - DIE at %s [in module %s]"),
15767 sect_offset_str (die
->sect_off
),
15768 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15773 if (attr
->form
== DW_FORM_sdata
)
15775 LONGEST val
= DW_SND (attr
);
15778 complaint (_("DW_AT_alignment value must not be negative"
15779 " - DIE at %s [in module %s]"),
15780 sect_offset_str (die
->sect_off
),
15781 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15787 align
= DW_UNSND (attr
);
15791 complaint (_("DW_AT_alignment value must not be zero"
15792 " - DIE at %s [in module %s]"),
15793 sect_offset_str (die
->sect_off
),
15794 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15797 if ((align
& (align
- 1)) != 0)
15799 complaint (_("DW_AT_alignment value must be a power of 2"
15800 " - DIE at %s [in module %s]"),
15801 sect_offset_str (die
->sect_off
),
15802 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15809 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15810 the alignment for TYPE. */
15813 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15816 if (!set_type_align (type
, get_alignment (cu
, die
)))
15817 complaint (_("DW_AT_alignment value too large"
15818 " - DIE at %s [in module %s]"),
15819 sect_offset_str (die
->sect_off
),
15820 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15823 /* Called when we find the DIE that starts a structure or union scope
15824 (definition) to create a type for the structure or union. Fill in
15825 the type's name and general properties; the members will not be
15826 processed until process_structure_scope. A symbol table entry for
15827 the type will also not be done until process_structure_scope (assuming
15828 the type has a name).
15830 NOTE: we need to call these functions regardless of whether or not the
15831 DIE has a DW_AT_name attribute, since it might be an anonymous
15832 structure or union. This gets the type entered into our set of
15833 user defined types. */
15835 static struct type
*
15836 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15838 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15840 struct attribute
*attr
;
15843 /* If the definition of this type lives in .debug_types, read that type.
15844 Don't follow DW_AT_specification though, that will take us back up
15845 the chain and we want to go down. */
15846 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15847 if (attr
!= nullptr)
15849 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15851 /* The type's CU may not be the same as CU.
15852 Ensure TYPE is recorded with CU in die_type_hash. */
15853 return set_die_type (die
, type
, cu
);
15856 type
= alloc_type (objfile
);
15857 INIT_CPLUS_SPECIFIC (type
);
15859 name
= dwarf2_name (die
, cu
);
15862 if (cu
->language
== language_cplus
15863 || cu
->language
== language_d
15864 || cu
->language
== language_rust
)
15866 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15868 /* dwarf2_full_name might have already finished building the DIE's
15869 type. If so, there is no need to continue. */
15870 if (get_die_type (die
, cu
) != NULL
)
15871 return get_die_type (die
, cu
);
15873 TYPE_NAME (type
) = full_name
;
15877 /* The name is already allocated along with this objfile, so
15878 we don't need to duplicate it for the type. */
15879 TYPE_NAME (type
) = name
;
15883 if (die
->tag
== DW_TAG_structure_type
)
15885 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15887 else if (die
->tag
== DW_TAG_union_type
)
15889 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15891 else if (die
->tag
== DW_TAG_variant_part
)
15893 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15894 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15898 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15901 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15902 TYPE_DECLARED_CLASS (type
) = 1;
15904 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15905 if (attr
!= nullptr)
15907 if (attr_form_is_constant (attr
))
15908 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15911 /* For the moment, dynamic type sizes are not supported
15912 by GDB's struct type. The actual size is determined
15913 on-demand when resolving the type of a given object,
15914 so set the type's length to zero for now. Otherwise,
15915 we record an expression as the length, and that expression
15916 could lead to a very large value, which could eventually
15917 lead to us trying to allocate that much memory when creating
15918 a value of that type. */
15919 TYPE_LENGTH (type
) = 0;
15924 TYPE_LENGTH (type
) = 0;
15927 maybe_set_alignment (cu
, die
, type
);
15929 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15931 /* ICC<14 does not output the required DW_AT_declaration on
15932 incomplete types, but gives them a size of zero. */
15933 TYPE_STUB (type
) = 1;
15936 TYPE_STUB_SUPPORTED (type
) = 1;
15938 if (die_is_declaration (die
, cu
))
15939 TYPE_STUB (type
) = 1;
15940 else if (attr
== NULL
&& die
->child
== NULL
15941 && producer_is_realview (cu
->producer
))
15942 /* RealView does not output the required DW_AT_declaration
15943 on incomplete types. */
15944 TYPE_STUB (type
) = 1;
15946 /* We need to add the type field to the die immediately so we don't
15947 infinitely recurse when dealing with pointers to the structure
15948 type within the structure itself. */
15949 set_die_type (die
, type
, cu
);
15951 /* set_die_type should be already done. */
15952 set_descriptive_type (type
, die
, cu
);
15957 /* A helper for process_structure_scope that handles a single member
15961 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15962 struct field_info
*fi
,
15963 std::vector
<struct symbol
*> *template_args
,
15964 struct dwarf2_cu
*cu
)
15966 if (child_die
->tag
== DW_TAG_member
15967 || child_die
->tag
== DW_TAG_variable
15968 || child_die
->tag
== DW_TAG_variant_part
)
15970 /* NOTE: carlton/2002-11-05: A C++ static data member
15971 should be a DW_TAG_member that is a declaration, but
15972 all versions of G++ as of this writing (so through at
15973 least 3.2.1) incorrectly generate DW_TAG_variable
15974 tags for them instead. */
15975 dwarf2_add_field (fi
, child_die
, cu
);
15977 else if (child_die
->tag
== DW_TAG_subprogram
)
15979 /* Rust doesn't have member functions in the C++ sense.
15980 However, it does emit ordinary functions as children
15981 of a struct DIE. */
15982 if (cu
->language
== language_rust
)
15983 read_func_scope (child_die
, cu
);
15986 /* C++ member function. */
15987 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15990 else if (child_die
->tag
== DW_TAG_inheritance
)
15992 /* C++ base class field. */
15993 dwarf2_add_field (fi
, child_die
, cu
);
15995 else if (type_can_define_types (child_die
))
15996 dwarf2_add_type_defn (fi
, child_die
, cu
);
15997 else if (child_die
->tag
== DW_TAG_template_type_param
15998 || child_die
->tag
== DW_TAG_template_value_param
)
16000 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
16003 template_args
->push_back (arg
);
16005 else if (child_die
->tag
== DW_TAG_variant
)
16007 /* In a variant we want to get the discriminant and also add a
16008 field for our sole member child. */
16009 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
16011 for (die_info
*variant_child
= child_die
->child
;
16012 variant_child
!= NULL
;
16013 variant_child
= sibling_die (variant_child
))
16015 if (variant_child
->tag
== DW_TAG_member
)
16017 handle_struct_member_die (variant_child
, type
, fi
,
16018 template_args
, cu
);
16019 /* Only handle the one. */
16024 /* We don't handle this but we might as well report it if we see
16026 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
16027 complaint (_("DW_AT_discr_list is not supported yet"
16028 " - DIE at %s [in module %s]"),
16029 sect_offset_str (child_die
->sect_off
),
16030 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16032 /* The first field was just added, so we can stash the
16033 discriminant there. */
16034 gdb_assert (!fi
->fields
.empty ());
16036 fi
->fields
.back ().variant
.default_branch
= true;
16038 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
16042 /* Finish creating a structure or union type, including filling in
16043 its members and creating a symbol for it. */
16046 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16048 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16049 struct die_info
*child_die
;
16052 type
= get_die_type (die
, cu
);
16054 type
= read_structure_type (die
, cu
);
16056 /* When reading a DW_TAG_variant_part, we need to notice when we
16057 read the discriminant member, so we can record it later in the
16058 discriminant_info. */
16059 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
16060 sect_offset discr_offset
;
16061 bool has_template_parameters
= false;
16063 if (is_variant_part
)
16065 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16068 /* Maybe it's a univariant form, an extension we support.
16069 In this case arrange not to check the offset. */
16070 is_variant_part
= false;
16072 else if (attr_form_is_ref (discr
))
16074 struct dwarf2_cu
*target_cu
= cu
;
16075 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16077 discr_offset
= target_die
->sect_off
;
16081 complaint (_("DW_AT_discr does not have DIE reference form"
16082 " - DIE at %s [in module %s]"),
16083 sect_offset_str (die
->sect_off
),
16084 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16085 is_variant_part
= false;
16089 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16091 struct field_info fi
;
16092 std::vector
<struct symbol
*> template_args
;
16094 child_die
= die
->child
;
16096 while (child_die
&& child_die
->tag
)
16098 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16100 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
16101 fi
.fields
.back ().variant
.is_discriminant
= true;
16103 child_die
= sibling_die (child_die
);
16106 /* Attach template arguments to type. */
16107 if (!template_args
.empty ())
16109 has_template_parameters
= true;
16110 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16111 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16112 TYPE_TEMPLATE_ARGUMENTS (type
)
16113 = XOBNEWVEC (&objfile
->objfile_obstack
,
16115 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16116 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16117 template_args
.data (),
16118 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16119 * sizeof (struct symbol
*)));
16122 /* Attach fields and member functions to the type. */
16124 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16125 if (!fi
.fnfieldlists
.empty ())
16127 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16129 /* Get the type which refers to the base class (possibly this
16130 class itself) which contains the vtable pointer for the current
16131 class from the DW_AT_containing_type attribute. This use of
16132 DW_AT_containing_type is a GNU extension. */
16134 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16136 struct type
*t
= die_containing_type (die
, cu
);
16138 set_type_vptr_basetype (type
, t
);
16143 /* Our own class provides vtbl ptr. */
16144 for (i
= TYPE_NFIELDS (t
) - 1;
16145 i
>= TYPE_N_BASECLASSES (t
);
16148 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16150 if (is_vtable_name (fieldname
, cu
))
16152 set_type_vptr_fieldno (type
, i
);
16157 /* Complain if virtual function table field not found. */
16158 if (i
< TYPE_N_BASECLASSES (t
))
16159 complaint (_("virtual function table pointer "
16160 "not found when defining class '%s'"),
16161 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
16165 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16168 else if (cu
->producer
16169 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16171 /* The IBM XLC compiler does not provide direct indication
16172 of the containing type, but the vtable pointer is
16173 always named __vfp. */
16177 for (i
= TYPE_NFIELDS (type
) - 1;
16178 i
>= TYPE_N_BASECLASSES (type
);
16181 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16183 set_type_vptr_fieldno (type
, i
);
16184 set_type_vptr_basetype (type
, type
);
16191 /* Copy fi.typedef_field_list linked list elements content into the
16192 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16193 if (!fi
.typedef_field_list
.empty ())
16195 int count
= fi
.typedef_field_list
.size ();
16197 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16198 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16199 = ((struct decl_field
*)
16201 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16202 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16204 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16205 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16208 /* Copy fi.nested_types_list linked list elements content into the
16209 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16210 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16212 int count
= fi
.nested_types_list
.size ();
16214 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16215 TYPE_NESTED_TYPES_ARRAY (type
)
16216 = ((struct decl_field
*)
16217 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16218 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16220 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16221 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16225 quirk_gcc_member_function_pointer (type
, objfile
);
16226 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16227 cu
->rust_unions
.push_back (type
);
16229 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16230 snapshots) has been known to create a die giving a declaration
16231 for a class that has, as a child, a die giving a definition for a
16232 nested class. So we have to process our children even if the
16233 current die is a declaration. Normally, of course, a declaration
16234 won't have any children at all. */
16236 child_die
= die
->child
;
16238 while (child_die
!= NULL
&& child_die
->tag
)
16240 if (child_die
->tag
== DW_TAG_member
16241 || child_die
->tag
== DW_TAG_variable
16242 || child_die
->tag
== DW_TAG_inheritance
16243 || child_die
->tag
== DW_TAG_template_value_param
16244 || child_die
->tag
== DW_TAG_template_type_param
)
16249 process_die (child_die
, cu
);
16251 child_die
= sibling_die (child_die
);
16254 /* Do not consider external references. According to the DWARF standard,
16255 these DIEs are identified by the fact that they have no byte_size
16256 attribute, and a declaration attribute. */
16257 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16258 || !die_is_declaration (die
, cu
))
16260 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16262 if (has_template_parameters
)
16264 struct symtab
*symtab
;
16265 if (sym
!= nullptr)
16266 symtab
= symbol_symtab (sym
);
16267 else if (cu
->line_header
!= nullptr)
16269 /* Any related symtab will do. */
16271 = cu
->line_header
->file_names ()[0].symtab
;
16276 complaint (_("could not find suitable "
16277 "symtab for template parameter"
16278 " - DIE at %s [in module %s]"),
16279 sect_offset_str (die
->sect_off
),
16280 objfile_name (objfile
));
16283 if (symtab
!= nullptr)
16285 /* Make sure that the symtab is set on the new symbols.
16286 Even though they don't appear in this symtab directly,
16287 other parts of gdb assume that symbols do, and this is
16288 reasonably true. */
16289 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16290 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16296 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16297 update TYPE using some information only available in DIE's children. */
16300 update_enumeration_type_from_children (struct die_info
*die
,
16302 struct dwarf2_cu
*cu
)
16304 struct die_info
*child_die
;
16305 int unsigned_enum
= 1;
16309 auto_obstack obstack
;
16311 for (child_die
= die
->child
;
16312 child_die
!= NULL
&& child_die
->tag
;
16313 child_die
= sibling_die (child_die
))
16315 struct attribute
*attr
;
16317 const gdb_byte
*bytes
;
16318 struct dwarf2_locexpr_baton
*baton
;
16321 if (child_die
->tag
!= DW_TAG_enumerator
)
16324 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16328 name
= dwarf2_name (child_die
, cu
);
16330 name
= "<anonymous enumerator>";
16332 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16333 &value
, &bytes
, &baton
);
16339 else if ((mask
& value
) != 0)
16344 /* If we already know that the enum type is neither unsigned, nor
16345 a flag type, no need to look at the rest of the enumerates. */
16346 if (!unsigned_enum
&& !flag_enum
)
16351 TYPE_UNSIGNED (type
) = 1;
16353 TYPE_FLAG_ENUM (type
) = 1;
16356 /* Given a DW_AT_enumeration_type die, set its type. We do not
16357 complete the type's fields yet, or create any symbols. */
16359 static struct type
*
16360 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16362 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16364 struct attribute
*attr
;
16367 /* If the definition of this type lives in .debug_types, read that type.
16368 Don't follow DW_AT_specification though, that will take us back up
16369 the chain and we want to go down. */
16370 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16371 if (attr
!= nullptr)
16373 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16375 /* The type's CU may not be the same as CU.
16376 Ensure TYPE is recorded with CU in die_type_hash. */
16377 return set_die_type (die
, type
, cu
);
16380 type
= alloc_type (objfile
);
16382 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16383 name
= dwarf2_full_name (NULL
, die
, cu
);
16385 TYPE_NAME (type
) = name
;
16387 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16390 struct type
*underlying_type
= die_type (die
, cu
);
16392 TYPE_TARGET_TYPE (type
) = underlying_type
;
16395 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16396 if (attr
!= nullptr)
16398 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16402 TYPE_LENGTH (type
) = 0;
16405 maybe_set_alignment (cu
, die
, type
);
16407 /* The enumeration DIE can be incomplete. In Ada, any type can be
16408 declared as private in the package spec, and then defined only
16409 inside the package body. Such types are known as Taft Amendment
16410 Types. When another package uses such a type, an incomplete DIE
16411 may be generated by the compiler. */
16412 if (die_is_declaration (die
, cu
))
16413 TYPE_STUB (type
) = 1;
16415 /* Finish the creation of this type by using the enum's children.
16416 We must call this even when the underlying type has been provided
16417 so that we can determine if we're looking at a "flag" enum. */
16418 update_enumeration_type_from_children (die
, type
, cu
);
16420 /* If this type has an underlying type that is not a stub, then we
16421 may use its attributes. We always use the "unsigned" attribute
16422 in this situation, because ordinarily we guess whether the type
16423 is unsigned -- but the guess can be wrong and the underlying type
16424 can tell us the reality. However, we defer to a local size
16425 attribute if one exists, because this lets the compiler override
16426 the underlying type if needed. */
16427 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16429 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16430 if (TYPE_LENGTH (type
) == 0)
16431 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16432 if (TYPE_RAW_ALIGN (type
) == 0
16433 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16434 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16437 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16439 return set_die_type (die
, type
, cu
);
16442 /* Given a pointer to a die which begins an enumeration, process all
16443 the dies that define the members of the enumeration, and create the
16444 symbol for the enumeration type.
16446 NOTE: We reverse the order of the element list. */
16449 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16451 struct type
*this_type
;
16453 this_type
= get_die_type (die
, cu
);
16454 if (this_type
== NULL
)
16455 this_type
= read_enumeration_type (die
, cu
);
16457 if (die
->child
!= NULL
)
16459 struct die_info
*child_die
;
16460 struct symbol
*sym
;
16461 struct field
*fields
= NULL
;
16462 int num_fields
= 0;
16465 child_die
= die
->child
;
16466 while (child_die
&& child_die
->tag
)
16468 if (child_die
->tag
!= DW_TAG_enumerator
)
16470 process_die (child_die
, cu
);
16474 name
= dwarf2_name (child_die
, cu
);
16477 sym
= new_symbol (child_die
, this_type
, cu
);
16479 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16481 fields
= (struct field
*)
16483 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16484 * sizeof (struct field
));
16487 FIELD_NAME (fields
[num_fields
]) = sym
->linkage_name ();
16488 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16489 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16490 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16496 child_die
= sibling_die (child_die
);
16501 TYPE_NFIELDS (this_type
) = num_fields
;
16502 TYPE_FIELDS (this_type
) = (struct field
*)
16503 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16504 memcpy (TYPE_FIELDS (this_type
), fields
,
16505 sizeof (struct field
) * num_fields
);
16510 /* If we are reading an enum from a .debug_types unit, and the enum
16511 is a declaration, and the enum is not the signatured type in the
16512 unit, then we do not want to add a symbol for it. Adding a
16513 symbol would in some cases obscure the true definition of the
16514 enum, giving users an incomplete type when the definition is
16515 actually available. Note that we do not want to do this for all
16516 enums which are just declarations, because C++0x allows forward
16517 enum declarations. */
16518 if (cu
->per_cu
->is_debug_types
16519 && die_is_declaration (die
, cu
))
16521 struct signatured_type
*sig_type
;
16523 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16524 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16525 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16529 new_symbol (die
, this_type
, cu
);
16532 /* Extract all information from a DW_TAG_array_type DIE and put it in
16533 the DIE's type field. For now, this only handles one dimensional
16536 static struct type
*
16537 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16539 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16540 struct die_info
*child_die
;
16542 struct type
*element_type
, *range_type
, *index_type
;
16543 struct attribute
*attr
;
16545 struct dynamic_prop
*byte_stride_prop
= NULL
;
16546 unsigned int bit_stride
= 0;
16548 element_type
= die_type (die
, cu
);
16550 /* The die_type call above may have already set the type for this DIE. */
16551 type
= get_die_type (die
, cu
);
16555 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16559 struct type
*prop_type
16560 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
16563 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16564 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16568 complaint (_("unable to read array DW_AT_byte_stride "
16569 " - DIE at %s [in module %s]"),
16570 sect_offset_str (die
->sect_off
),
16571 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16572 /* Ignore this attribute. We will likely not be able to print
16573 arrays of this type correctly, but there is little we can do
16574 to help if we cannot read the attribute's value. */
16575 byte_stride_prop
= NULL
;
16579 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16581 bit_stride
= DW_UNSND (attr
);
16583 /* Irix 6.2 native cc creates array types without children for
16584 arrays with unspecified length. */
16585 if (die
->child
== NULL
)
16587 index_type
= objfile_type (objfile
)->builtin_int
;
16588 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16589 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16590 byte_stride_prop
, bit_stride
);
16591 return set_die_type (die
, type
, cu
);
16594 std::vector
<struct type
*> range_types
;
16595 child_die
= die
->child
;
16596 while (child_die
&& child_die
->tag
)
16598 if (child_die
->tag
== DW_TAG_subrange_type
)
16600 struct type
*child_type
= read_type_die (child_die
, cu
);
16602 if (child_type
!= NULL
)
16604 /* The range type was succesfully read. Save it for the
16605 array type creation. */
16606 range_types
.push_back (child_type
);
16609 child_die
= sibling_die (child_die
);
16612 /* Dwarf2 dimensions are output from left to right, create the
16613 necessary array types in backwards order. */
16615 type
= element_type
;
16617 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16621 while (i
< range_types
.size ())
16622 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16623 byte_stride_prop
, bit_stride
);
16627 size_t ndim
= range_types
.size ();
16629 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16630 byte_stride_prop
, bit_stride
);
16633 /* Understand Dwarf2 support for vector types (like they occur on
16634 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16635 array type. This is not part of the Dwarf2/3 standard yet, but a
16636 custom vendor extension. The main difference between a regular
16637 array and the vector variant is that vectors are passed by value
16639 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16640 if (attr
!= nullptr)
16641 make_vector_type (type
);
16643 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16644 implementation may choose to implement triple vectors using this
16646 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16647 if (attr
!= nullptr)
16649 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16650 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16652 complaint (_("DW_AT_byte_size for array type smaller "
16653 "than the total size of elements"));
16656 name
= dwarf2_name (die
, cu
);
16658 TYPE_NAME (type
) = name
;
16660 maybe_set_alignment (cu
, die
, type
);
16662 /* Install the type in the die. */
16663 set_die_type (die
, type
, cu
);
16665 /* set_die_type should be already done. */
16666 set_descriptive_type (type
, die
, cu
);
16671 static enum dwarf_array_dim_ordering
16672 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16674 struct attribute
*attr
;
16676 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16678 if (attr
!= nullptr)
16679 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16681 /* GNU F77 is a special case, as at 08/2004 array type info is the
16682 opposite order to the dwarf2 specification, but data is still
16683 laid out as per normal fortran.
16685 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16686 version checking. */
16688 if (cu
->language
== language_fortran
16689 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16691 return DW_ORD_row_major
;
16694 switch (cu
->language_defn
->la_array_ordering
)
16696 case array_column_major
:
16697 return DW_ORD_col_major
;
16698 case array_row_major
:
16700 return DW_ORD_row_major
;
16704 /* Extract all information from a DW_TAG_set_type DIE and put it in
16705 the DIE's type field. */
16707 static struct type
*
16708 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16710 struct type
*domain_type
, *set_type
;
16711 struct attribute
*attr
;
16713 domain_type
= die_type (die
, cu
);
16715 /* The die_type call above may have already set the type for this DIE. */
16716 set_type
= get_die_type (die
, cu
);
16720 set_type
= create_set_type (NULL
, domain_type
);
16722 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16723 if (attr
!= nullptr)
16724 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16726 maybe_set_alignment (cu
, die
, set_type
);
16728 return set_die_type (die
, set_type
, cu
);
16731 /* A helper for read_common_block that creates a locexpr baton.
16732 SYM is the symbol which we are marking as computed.
16733 COMMON_DIE is the DIE for the common block.
16734 COMMON_LOC is the location expression attribute for the common
16736 MEMBER_LOC is the location expression attribute for the particular
16737 member of the common block that we are processing.
16738 CU is the CU from which the above come. */
16741 mark_common_block_symbol_computed (struct symbol
*sym
,
16742 struct die_info
*common_die
,
16743 struct attribute
*common_loc
,
16744 struct attribute
*member_loc
,
16745 struct dwarf2_cu
*cu
)
16747 struct dwarf2_per_objfile
*dwarf2_per_objfile
16748 = cu
->per_cu
->dwarf2_per_objfile
;
16749 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16750 struct dwarf2_locexpr_baton
*baton
;
16752 unsigned int cu_off
;
16753 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16754 LONGEST offset
= 0;
16756 gdb_assert (common_loc
&& member_loc
);
16757 gdb_assert (attr_form_is_block (common_loc
));
16758 gdb_assert (attr_form_is_block (member_loc
)
16759 || attr_form_is_constant (member_loc
));
16761 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16762 baton
->per_cu
= cu
->per_cu
;
16763 gdb_assert (baton
->per_cu
);
16765 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16767 if (attr_form_is_constant (member_loc
))
16769 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16770 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16773 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16775 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16778 *ptr
++ = DW_OP_call4
;
16779 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16780 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16783 if (attr_form_is_constant (member_loc
))
16785 *ptr
++ = DW_OP_addr
;
16786 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16787 ptr
+= cu
->header
.addr_size
;
16791 /* We have to copy the data here, because DW_OP_call4 will only
16792 use a DW_AT_location attribute. */
16793 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16794 ptr
+= DW_BLOCK (member_loc
)->size
;
16797 *ptr
++ = DW_OP_plus
;
16798 gdb_assert (ptr
- baton
->data
== baton
->size
);
16800 SYMBOL_LOCATION_BATON (sym
) = baton
;
16801 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16804 /* Create appropriate locally-scoped variables for all the
16805 DW_TAG_common_block entries. Also create a struct common_block
16806 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16807 is used to separate the common blocks name namespace from regular
16811 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16813 struct attribute
*attr
;
16815 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16816 if (attr
!= nullptr)
16818 /* Support the .debug_loc offsets. */
16819 if (attr_form_is_block (attr
))
16823 else if (attr_form_is_section_offset (attr
))
16825 dwarf2_complex_location_expr_complaint ();
16830 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16831 "common block member");
16836 if (die
->child
!= NULL
)
16838 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16839 struct die_info
*child_die
;
16840 size_t n_entries
= 0, size
;
16841 struct common_block
*common_block
;
16842 struct symbol
*sym
;
16844 for (child_die
= die
->child
;
16845 child_die
&& child_die
->tag
;
16846 child_die
= sibling_die (child_die
))
16849 size
= (sizeof (struct common_block
)
16850 + (n_entries
- 1) * sizeof (struct symbol
*));
16852 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16854 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16855 common_block
->n_entries
= 0;
16857 for (child_die
= die
->child
;
16858 child_die
&& child_die
->tag
;
16859 child_die
= sibling_die (child_die
))
16861 /* Create the symbol in the DW_TAG_common_block block in the current
16863 sym
= new_symbol (child_die
, NULL
, cu
);
16866 struct attribute
*member_loc
;
16868 common_block
->contents
[common_block
->n_entries
++] = sym
;
16870 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16874 /* GDB has handled this for a long time, but it is
16875 not specified by DWARF. It seems to have been
16876 emitted by gfortran at least as recently as:
16877 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16878 complaint (_("Variable in common block has "
16879 "DW_AT_data_member_location "
16880 "- DIE at %s [in module %s]"),
16881 sect_offset_str (child_die
->sect_off
),
16882 objfile_name (objfile
));
16884 if (attr_form_is_section_offset (member_loc
))
16885 dwarf2_complex_location_expr_complaint ();
16886 else if (attr_form_is_constant (member_loc
)
16887 || attr_form_is_block (member_loc
))
16889 if (attr
!= nullptr)
16890 mark_common_block_symbol_computed (sym
, die
, attr
,
16894 dwarf2_complex_location_expr_complaint ();
16899 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16900 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16904 /* Create a type for a C++ namespace. */
16906 static struct type
*
16907 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16909 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16910 const char *previous_prefix
, *name
;
16914 /* For extensions, reuse the type of the original namespace. */
16915 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16917 struct die_info
*ext_die
;
16918 struct dwarf2_cu
*ext_cu
= cu
;
16920 ext_die
= dwarf2_extension (die
, &ext_cu
);
16921 type
= read_type_die (ext_die
, ext_cu
);
16923 /* EXT_CU may not be the same as CU.
16924 Ensure TYPE is recorded with CU in die_type_hash. */
16925 return set_die_type (die
, type
, cu
);
16928 name
= namespace_name (die
, &is_anonymous
, cu
);
16930 /* Now build the name of the current namespace. */
16932 previous_prefix
= determine_prefix (die
, cu
);
16933 if (previous_prefix
[0] != '\0')
16934 name
= typename_concat (&objfile
->objfile_obstack
,
16935 previous_prefix
, name
, 0, cu
);
16937 /* Create the type. */
16938 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16940 return set_die_type (die
, type
, cu
);
16943 /* Read a namespace scope. */
16946 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16948 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16951 /* Add a symbol associated to this if we haven't seen the namespace
16952 before. Also, add a using directive if it's an anonymous
16955 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16959 type
= read_type_die (die
, cu
);
16960 new_symbol (die
, type
, cu
);
16962 namespace_name (die
, &is_anonymous
, cu
);
16965 const char *previous_prefix
= determine_prefix (die
, cu
);
16967 std::vector
<const char *> excludes
;
16968 add_using_directive (using_directives (cu
),
16969 previous_prefix
, TYPE_NAME (type
), NULL
,
16970 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16974 if (die
->child
!= NULL
)
16976 struct die_info
*child_die
= die
->child
;
16978 while (child_die
&& child_die
->tag
)
16980 process_die (child_die
, cu
);
16981 child_die
= sibling_die (child_die
);
16986 /* Read a Fortran module as type. This DIE can be only a declaration used for
16987 imported module. Still we need that type as local Fortran "use ... only"
16988 declaration imports depend on the created type in determine_prefix. */
16990 static struct type
*
16991 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16993 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16994 const char *module_name
;
16997 module_name
= dwarf2_name (die
, cu
);
16998 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
17000 return set_die_type (die
, type
, cu
);
17003 /* Read a Fortran module. */
17006 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
17008 struct die_info
*child_die
= die
->child
;
17011 type
= read_type_die (die
, cu
);
17012 new_symbol (die
, type
, cu
);
17014 while (child_die
&& child_die
->tag
)
17016 process_die (child_die
, cu
);
17017 child_die
= sibling_die (child_die
);
17021 /* Return the name of the namespace represented by DIE. Set
17022 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
17025 static const char *
17026 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
17028 struct die_info
*current_die
;
17029 const char *name
= NULL
;
17031 /* Loop through the extensions until we find a name. */
17033 for (current_die
= die
;
17034 current_die
!= NULL
;
17035 current_die
= dwarf2_extension (die
, &cu
))
17037 /* We don't use dwarf2_name here so that we can detect the absence
17038 of a name -> anonymous namespace. */
17039 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
17045 /* Is it an anonymous namespace? */
17047 *is_anonymous
= (name
== NULL
);
17049 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17054 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17055 the user defined type vector. */
17057 static struct type
*
17058 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17060 struct gdbarch
*gdbarch
17061 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17062 struct comp_unit_head
*cu_header
= &cu
->header
;
17064 struct attribute
*attr_byte_size
;
17065 struct attribute
*attr_address_class
;
17066 int byte_size
, addr_class
;
17067 struct type
*target_type
;
17069 target_type
= die_type (die
, cu
);
17071 /* The die_type call above may have already set the type for this DIE. */
17072 type
= get_die_type (die
, cu
);
17076 type
= lookup_pointer_type (target_type
);
17078 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17079 if (attr_byte_size
)
17080 byte_size
= DW_UNSND (attr_byte_size
);
17082 byte_size
= cu_header
->addr_size
;
17084 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17085 if (attr_address_class
)
17086 addr_class
= DW_UNSND (attr_address_class
);
17088 addr_class
= DW_ADDR_none
;
17090 ULONGEST alignment
= get_alignment (cu
, die
);
17092 /* If the pointer size, alignment, or address class is different
17093 than the default, create a type variant marked as such and set
17094 the length accordingly. */
17095 if (TYPE_LENGTH (type
) != byte_size
17096 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17097 && alignment
!= TYPE_RAW_ALIGN (type
))
17098 || addr_class
!= DW_ADDR_none
)
17100 if (gdbarch_address_class_type_flags_p (gdbarch
))
17104 type_flags
= gdbarch_address_class_type_flags
17105 (gdbarch
, byte_size
, addr_class
);
17106 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17108 type
= make_type_with_address_space (type
, type_flags
);
17110 else if (TYPE_LENGTH (type
) != byte_size
)
17112 complaint (_("invalid pointer size %d"), byte_size
);
17114 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17116 complaint (_("Invalid DW_AT_alignment"
17117 " - DIE at %s [in module %s]"),
17118 sect_offset_str (die
->sect_off
),
17119 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17123 /* Should we also complain about unhandled address classes? */
17127 TYPE_LENGTH (type
) = byte_size
;
17128 set_type_align (type
, alignment
);
17129 return set_die_type (die
, type
, cu
);
17132 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17133 the user defined type vector. */
17135 static struct type
*
17136 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17139 struct type
*to_type
;
17140 struct type
*domain
;
17142 to_type
= die_type (die
, cu
);
17143 domain
= die_containing_type (die
, cu
);
17145 /* The calls above may have already set the type for this DIE. */
17146 type
= get_die_type (die
, cu
);
17150 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17151 type
= lookup_methodptr_type (to_type
);
17152 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17154 struct type
*new_type
17155 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17157 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17158 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17159 TYPE_VARARGS (to_type
));
17160 type
= lookup_methodptr_type (new_type
);
17163 type
= lookup_memberptr_type (to_type
, domain
);
17165 return set_die_type (die
, type
, cu
);
17168 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17169 the user defined type vector. */
17171 static struct type
*
17172 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17173 enum type_code refcode
)
17175 struct comp_unit_head
*cu_header
= &cu
->header
;
17176 struct type
*type
, *target_type
;
17177 struct attribute
*attr
;
17179 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17181 target_type
= die_type (die
, cu
);
17183 /* The die_type call above may have already set the type for this DIE. */
17184 type
= get_die_type (die
, cu
);
17188 type
= lookup_reference_type (target_type
, refcode
);
17189 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17190 if (attr
!= nullptr)
17192 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17196 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17198 maybe_set_alignment (cu
, die
, type
);
17199 return set_die_type (die
, type
, cu
);
17202 /* Add the given cv-qualifiers to the element type of the array. GCC
17203 outputs DWARF type qualifiers that apply to an array, not the
17204 element type. But GDB relies on the array element type to carry
17205 the cv-qualifiers. This mimics section 6.7.3 of the C99
17208 static struct type
*
17209 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17210 struct type
*base_type
, int cnst
, int voltl
)
17212 struct type
*el_type
, *inner_array
;
17214 base_type
= copy_type (base_type
);
17215 inner_array
= base_type
;
17217 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17219 TYPE_TARGET_TYPE (inner_array
) =
17220 copy_type (TYPE_TARGET_TYPE (inner_array
));
17221 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17224 el_type
= TYPE_TARGET_TYPE (inner_array
);
17225 cnst
|= TYPE_CONST (el_type
);
17226 voltl
|= TYPE_VOLATILE (el_type
);
17227 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17229 return set_die_type (die
, base_type
, cu
);
17232 static struct type
*
17233 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17235 struct type
*base_type
, *cv_type
;
17237 base_type
= die_type (die
, cu
);
17239 /* The die_type call above may have already set the type for this DIE. */
17240 cv_type
= get_die_type (die
, cu
);
17244 /* In case the const qualifier is applied to an array type, the element type
17245 is so qualified, not the array type (section 6.7.3 of C99). */
17246 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17247 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17249 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17250 return set_die_type (die
, cv_type
, cu
);
17253 static struct type
*
17254 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17256 struct type
*base_type
, *cv_type
;
17258 base_type
= die_type (die
, cu
);
17260 /* The die_type call above may have already set the type for this DIE. */
17261 cv_type
= get_die_type (die
, cu
);
17265 /* In case the volatile qualifier is applied to an array type, the
17266 element type is so qualified, not the array type (section 6.7.3
17268 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17269 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17271 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17272 return set_die_type (die
, cv_type
, cu
);
17275 /* Handle DW_TAG_restrict_type. */
17277 static struct type
*
17278 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17280 struct type
*base_type
, *cv_type
;
17282 base_type
= die_type (die
, cu
);
17284 /* The die_type call above may have already set the type for this DIE. */
17285 cv_type
= get_die_type (die
, cu
);
17289 cv_type
= make_restrict_type (base_type
);
17290 return set_die_type (die
, cv_type
, cu
);
17293 /* Handle DW_TAG_atomic_type. */
17295 static struct type
*
17296 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17298 struct type
*base_type
, *cv_type
;
17300 base_type
= die_type (die
, cu
);
17302 /* The die_type call above may have already set the type for this DIE. */
17303 cv_type
= get_die_type (die
, cu
);
17307 cv_type
= make_atomic_type (base_type
);
17308 return set_die_type (die
, cv_type
, cu
);
17311 /* Extract all information from a DW_TAG_string_type DIE and add to
17312 the user defined type vector. It isn't really a user defined type,
17313 but it behaves like one, with other DIE's using an AT_user_def_type
17314 attribute to reference it. */
17316 static struct type
*
17317 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17319 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17320 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17321 struct type
*type
, *range_type
, *index_type
, *char_type
;
17322 struct attribute
*attr
;
17323 unsigned int length
;
17325 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17326 if (attr
!= nullptr)
17328 length
= DW_UNSND (attr
);
17332 /* Check for the DW_AT_byte_size attribute. */
17333 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17334 if (attr
!= nullptr)
17336 length
= DW_UNSND (attr
);
17344 index_type
= objfile_type (objfile
)->builtin_int
;
17345 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17346 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17347 type
= create_string_type (NULL
, char_type
, range_type
);
17349 return set_die_type (die
, type
, cu
);
17352 /* Assuming that DIE corresponds to a function, returns nonzero
17353 if the function is prototyped. */
17356 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17358 struct attribute
*attr
;
17360 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17361 if (attr
&& (DW_UNSND (attr
) != 0))
17364 /* The DWARF standard implies that the DW_AT_prototyped attribute
17365 is only meaningful for C, but the concept also extends to other
17366 languages that allow unprototyped functions (Eg: Objective C).
17367 For all other languages, assume that functions are always
17369 if (cu
->language
!= language_c
17370 && cu
->language
!= language_objc
17371 && cu
->language
!= language_opencl
)
17374 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17375 prototyped and unprototyped functions; default to prototyped,
17376 since that is more common in modern code (and RealView warns
17377 about unprototyped functions). */
17378 if (producer_is_realview (cu
->producer
))
17384 /* Handle DIES due to C code like:
17388 int (*funcp)(int a, long l);
17392 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17394 static struct type
*
17395 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17397 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17398 struct type
*type
; /* Type that this function returns. */
17399 struct type
*ftype
; /* Function that returns above type. */
17400 struct attribute
*attr
;
17402 type
= die_type (die
, cu
);
17404 /* The die_type call above may have already set the type for this DIE. */
17405 ftype
= get_die_type (die
, cu
);
17409 ftype
= lookup_function_type (type
);
17411 if (prototyped_function_p (die
, cu
))
17412 TYPE_PROTOTYPED (ftype
) = 1;
17414 /* Store the calling convention in the type if it's available in
17415 the subroutine die. Otherwise set the calling convention to
17416 the default value DW_CC_normal. */
17417 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17418 if (attr
!= nullptr)
17419 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17420 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17421 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17423 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17425 /* Record whether the function returns normally to its caller or not
17426 if the DWARF producer set that information. */
17427 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17428 if (attr
&& (DW_UNSND (attr
) != 0))
17429 TYPE_NO_RETURN (ftype
) = 1;
17431 /* We need to add the subroutine type to the die immediately so
17432 we don't infinitely recurse when dealing with parameters
17433 declared as the same subroutine type. */
17434 set_die_type (die
, ftype
, cu
);
17436 if (die
->child
!= NULL
)
17438 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17439 struct die_info
*child_die
;
17440 int nparams
, iparams
;
17442 /* Count the number of parameters.
17443 FIXME: GDB currently ignores vararg functions, but knows about
17444 vararg member functions. */
17446 child_die
= die
->child
;
17447 while (child_die
&& child_die
->tag
)
17449 if (child_die
->tag
== DW_TAG_formal_parameter
)
17451 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17452 TYPE_VARARGS (ftype
) = 1;
17453 child_die
= sibling_die (child_die
);
17456 /* Allocate storage for parameters and fill them in. */
17457 TYPE_NFIELDS (ftype
) = nparams
;
17458 TYPE_FIELDS (ftype
) = (struct field
*)
17459 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17461 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17462 even if we error out during the parameters reading below. */
17463 for (iparams
= 0; iparams
< nparams
; iparams
++)
17464 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17467 child_die
= die
->child
;
17468 while (child_die
&& child_die
->tag
)
17470 if (child_die
->tag
== DW_TAG_formal_parameter
)
17472 struct type
*arg_type
;
17474 /* DWARF version 2 has no clean way to discern C++
17475 static and non-static member functions. G++ helps
17476 GDB by marking the first parameter for non-static
17477 member functions (which is the this pointer) as
17478 artificial. We pass this information to
17479 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17481 DWARF version 3 added DW_AT_object_pointer, which GCC
17482 4.5 does not yet generate. */
17483 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17484 if (attr
!= nullptr)
17485 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17487 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17488 arg_type
= die_type (child_die
, cu
);
17490 /* RealView does not mark THIS as const, which the testsuite
17491 expects. GCC marks THIS as const in method definitions,
17492 but not in the class specifications (GCC PR 43053). */
17493 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17494 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17497 struct dwarf2_cu
*arg_cu
= cu
;
17498 const char *name
= dwarf2_name (child_die
, cu
);
17500 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17501 if (attr
!= nullptr)
17503 /* If the compiler emits this, use it. */
17504 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17507 else if (name
&& strcmp (name
, "this") == 0)
17508 /* Function definitions will have the argument names. */
17510 else if (name
== NULL
&& iparams
== 0)
17511 /* Declarations may not have the names, so like
17512 elsewhere in GDB, assume an artificial first
17513 argument is "this". */
17517 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17521 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17524 child_die
= sibling_die (child_die
);
17531 static struct type
*
17532 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17534 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17535 const char *name
= NULL
;
17536 struct type
*this_type
, *target_type
;
17538 name
= dwarf2_full_name (NULL
, die
, cu
);
17539 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17540 TYPE_TARGET_STUB (this_type
) = 1;
17541 set_die_type (die
, this_type
, cu
);
17542 target_type
= die_type (die
, cu
);
17543 if (target_type
!= this_type
)
17544 TYPE_TARGET_TYPE (this_type
) = target_type
;
17547 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17548 spec and cause infinite loops in GDB. */
17549 complaint (_("Self-referential DW_TAG_typedef "
17550 "- DIE at %s [in module %s]"),
17551 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17552 TYPE_TARGET_TYPE (this_type
) = NULL
;
17557 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17558 (which may be different from NAME) to the architecture back-end to allow
17559 it to guess the correct format if necessary. */
17561 static struct type
*
17562 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17563 const char *name_hint
)
17565 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17566 const struct floatformat
**format
;
17569 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17571 type
= init_float_type (objfile
, bits
, name
, format
);
17573 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17578 /* Allocate an integer type of size BITS and name NAME. */
17580 static struct type
*
17581 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17582 int bits
, int unsigned_p
, const char *name
)
17586 /* Versions of Intel's C Compiler generate an integer type called "void"
17587 instead of using DW_TAG_unspecified_type. This has been seen on
17588 at least versions 14, 17, and 18. */
17589 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17590 && strcmp (name
, "void") == 0)
17591 type
= objfile_type (objfile
)->builtin_void
;
17593 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17598 /* Initialise and return a floating point type of size BITS suitable for
17599 use as a component of a complex number. The NAME_HINT is passed through
17600 when initialising the floating point type and is the name of the complex
17603 As DWARF doesn't currently provide an explicit name for the components
17604 of a complex number, but it can be helpful to have these components
17605 named, we try to select a suitable name based on the size of the
17607 static struct type
*
17608 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17609 struct objfile
*objfile
,
17610 int bits
, const char *name_hint
)
17612 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17613 struct type
*tt
= nullptr;
17615 /* Try to find a suitable floating point builtin type of size BITS.
17616 We're going to use the name of this type as the name for the complex
17617 target type that we are about to create. */
17618 switch (cu
->language
)
17620 case language_fortran
:
17624 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17627 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17629 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17631 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17639 tt
= builtin_type (gdbarch
)->builtin_float
;
17642 tt
= builtin_type (gdbarch
)->builtin_double
;
17644 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17646 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17652 /* If the type we found doesn't match the size we were looking for, then
17653 pretend we didn't find a type at all, the complex target type we
17654 create will then be nameless. */
17655 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17658 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17659 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
);
17662 /* Find a representation of a given base type and install
17663 it in the TYPE field of the die. */
17665 static struct type
*
17666 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17668 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17670 struct attribute
*attr
;
17671 int encoding
= 0, bits
= 0;
17676 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17677 if (attr
!= nullptr)
17678 encoding
= DW_UNSND (attr
);
17679 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17680 if (attr
!= nullptr)
17681 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17682 name
= dwarf2_name (die
, cu
);
17684 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17685 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17687 endianity
= DW_UNSND (attr
);
17689 arch
= get_objfile_arch (objfile
);
17692 case DW_ATE_address
:
17693 /* Turn DW_ATE_address into a void * pointer. */
17694 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17695 type
= init_pointer_type (objfile
, bits
, name
, type
);
17697 case DW_ATE_boolean
:
17698 type
= init_boolean_type (objfile
, bits
, 1, name
);
17700 case DW_ATE_complex_float
:
17701 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
);
17702 type
= init_complex_type (objfile
, name
, type
);
17704 case DW_ATE_decimal_float
:
17705 type
= init_decfloat_type (objfile
, bits
, name
);
17708 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17710 case DW_ATE_signed
:
17711 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17713 case DW_ATE_unsigned
:
17714 if (cu
->language
== language_fortran
17716 && startswith (name
, "character("))
17717 type
= init_character_type (objfile
, bits
, 1, name
);
17719 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17721 case DW_ATE_signed_char
:
17722 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17723 || cu
->language
== language_pascal
17724 || cu
->language
== language_fortran
)
17725 type
= init_character_type (objfile
, bits
, 0, name
);
17727 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17729 case DW_ATE_unsigned_char
:
17730 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17731 || cu
->language
== language_pascal
17732 || cu
->language
== language_fortran
17733 || cu
->language
== language_rust
)
17734 type
= init_character_type (objfile
, bits
, 1, name
);
17736 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17741 type
= builtin_type (arch
)->builtin_char16
;
17742 else if (bits
== 32)
17743 type
= builtin_type (arch
)->builtin_char32
;
17746 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17748 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17750 return set_die_type (die
, type
, cu
);
17755 complaint (_("unsupported DW_AT_encoding: '%s'"),
17756 dwarf_type_encoding_name (encoding
));
17757 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17761 if (name
&& strcmp (name
, "char") == 0)
17762 TYPE_NOSIGN (type
) = 1;
17764 maybe_set_alignment (cu
, die
, type
);
17769 if (gdbarch_byte_order (arch
) == BFD_ENDIAN_LITTLE
)
17770 TYPE_ENDIANITY_NOT_DEFAULT (type
) = 1;
17772 case DW_END_little
:
17773 if (gdbarch_byte_order (arch
) == BFD_ENDIAN_BIG
)
17774 TYPE_ENDIANITY_NOT_DEFAULT (type
) = 1;
17778 return set_die_type (die
, type
, cu
);
17781 /* Parse dwarf attribute if it's a block, reference or constant and put the
17782 resulting value of the attribute into struct bound_prop.
17783 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17786 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17787 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17788 struct type
*default_type
)
17790 struct dwarf2_property_baton
*baton
;
17791 struct obstack
*obstack
17792 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17794 gdb_assert (default_type
!= NULL
);
17796 if (attr
== NULL
|| prop
== NULL
)
17799 if (attr_form_is_block (attr
))
17801 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17802 baton
->property_type
= default_type
;
17803 baton
->locexpr
.per_cu
= cu
->per_cu
;
17804 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17805 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17806 baton
->locexpr
.is_reference
= false;
17807 prop
->data
.baton
= baton
;
17808 prop
->kind
= PROP_LOCEXPR
;
17809 gdb_assert (prop
->data
.baton
!= NULL
);
17811 else if (attr_form_is_ref (attr
))
17813 struct dwarf2_cu
*target_cu
= cu
;
17814 struct die_info
*target_die
;
17815 struct attribute
*target_attr
;
17817 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17818 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17819 if (target_attr
== NULL
)
17820 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17822 if (target_attr
== NULL
)
17825 switch (target_attr
->name
)
17827 case DW_AT_location
:
17828 if (attr_form_is_section_offset (target_attr
))
17830 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17831 baton
->property_type
= die_type (target_die
, target_cu
);
17832 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17833 prop
->data
.baton
= baton
;
17834 prop
->kind
= PROP_LOCLIST
;
17835 gdb_assert (prop
->data
.baton
!= NULL
);
17837 else if (attr_form_is_block (target_attr
))
17839 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17840 baton
->property_type
= die_type (target_die
, target_cu
);
17841 baton
->locexpr
.per_cu
= cu
->per_cu
;
17842 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17843 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17844 baton
->locexpr
.is_reference
= true;
17845 prop
->data
.baton
= baton
;
17846 prop
->kind
= PROP_LOCEXPR
;
17847 gdb_assert (prop
->data
.baton
!= NULL
);
17851 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17852 "dynamic property");
17856 case DW_AT_data_member_location
:
17860 if (!handle_data_member_location (target_die
, target_cu
,
17864 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17865 baton
->property_type
= read_type_die (target_die
->parent
,
17867 baton
->offset_info
.offset
= offset
;
17868 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17869 prop
->data
.baton
= baton
;
17870 prop
->kind
= PROP_ADDR_OFFSET
;
17875 else if (attr_form_is_constant (attr
))
17877 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17878 prop
->kind
= PROP_CONST
;
17882 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17883 dwarf2_name (die
, cu
));
17890 /* Find an integer type the same size as the address size given in the
17891 compilation unit header for PER_CU. UNSIGNED_P controls if the integer
17892 is unsigned or not. */
17894 static struct type
*
17895 dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data
*per_cu
,
17898 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
17899 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
17900 struct type
*int_type
;
17902 /* Helper macro to examine the various builtin types. */
17903 #define TRY_TYPE(F) \
17904 int_type = (unsigned_p \
17905 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17906 : objfile_type (objfile)->builtin_ ## F); \
17907 if (int_type != NULL && TYPE_LENGTH (int_type) == addr_size) \
17914 TRY_TYPE (long_long
);
17918 gdb_assert_not_reached ("unable to find suitable integer type");
17921 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17922 present (which is valid) then compute the default type based on the
17923 compilation units address size. */
17925 static struct type
*
17926 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17928 struct type
*index_type
= die_type (die
, cu
);
17930 /* Dwarf-2 specifications explicitly allows to create subrange types
17931 without specifying a base type.
17932 In that case, the base type must be set to the type of
17933 the lower bound, upper bound or count, in that order, if any of these
17934 three attributes references an object that has a type.
17935 If no base type is found, the Dwarf-2 specifications say that
17936 a signed integer type of size equal to the size of an address should
17938 For the following C code: `extern char gdb_int [];'
17939 GCC produces an empty range DIE.
17940 FIXME: muller/2010-05-28: Possible references to object for low bound,
17941 high bound or count are not yet handled by this code. */
17942 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17943 index_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17948 /* Read the given DW_AT_subrange DIE. */
17950 static struct type
*
17951 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17953 struct type
*base_type
, *orig_base_type
;
17954 struct type
*range_type
;
17955 struct attribute
*attr
;
17956 struct dynamic_prop low
, high
;
17957 int low_default_is_valid
;
17958 int high_bound_is_count
= 0;
17960 ULONGEST negative_mask
;
17962 orig_base_type
= read_subrange_index_type (die
, cu
);
17964 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17965 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17966 creating the range type, but we use the result of check_typedef
17967 when examining properties of the type. */
17968 base_type
= check_typedef (orig_base_type
);
17970 /* The die_type call above may have already set the type for this DIE. */
17971 range_type
= get_die_type (die
, cu
);
17975 low
.kind
= PROP_CONST
;
17976 high
.kind
= PROP_CONST
;
17977 high
.data
.const_val
= 0;
17979 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17980 omitting DW_AT_lower_bound. */
17981 switch (cu
->language
)
17984 case language_cplus
:
17985 low
.data
.const_val
= 0;
17986 low_default_is_valid
= 1;
17988 case language_fortran
:
17989 low
.data
.const_val
= 1;
17990 low_default_is_valid
= 1;
17993 case language_objc
:
17994 case language_rust
:
17995 low
.data
.const_val
= 0;
17996 low_default_is_valid
= (cu
->header
.version
>= 4);
18000 case language_pascal
:
18001 low
.data
.const_val
= 1;
18002 low_default_is_valid
= (cu
->header
.version
>= 4);
18005 low
.data
.const_val
= 0;
18006 low_default_is_valid
= 0;
18010 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
18011 if (attr
!= nullptr)
18012 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
18013 else if (!low_default_is_valid
)
18014 complaint (_("Missing DW_AT_lower_bound "
18015 "- DIE at %s [in module %s]"),
18016 sect_offset_str (die
->sect_off
),
18017 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
18019 struct attribute
*attr_ub
, *attr_count
;
18020 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
18021 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18023 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
18024 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18026 /* If bounds are constant do the final calculation here. */
18027 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
18028 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
18030 high_bound_is_count
= 1;
18034 if (attr_ub
!= NULL
)
18035 complaint (_("Unresolved DW_AT_upper_bound "
18036 "- DIE at %s [in module %s]"),
18037 sect_offset_str (die
->sect_off
),
18038 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
18039 if (attr_count
!= NULL
)
18040 complaint (_("Unresolved DW_AT_count "
18041 "- DIE at %s [in module %s]"),
18042 sect_offset_str (die
->sect_off
),
18043 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
18048 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
18049 if (bias_attr
!= nullptr && attr_form_is_constant (bias_attr
))
18050 bias
= dwarf2_get_attr_constant_value (bias_attr
, 0);
18052 /* Normally, the DWARF producers are expected to use a signed
18053 constant form (Eg. DW_FORM_sdata) to express negative bounds.
18054 But this is unfortunately not always the case, as witnessed
18055 with GCC, for instance, where the ambiguous DW_FORM_dataN form
18056 is used instead. To work around that ambiguity, we treat
18057 the bounds as signed, and thus sign-extend their values, when
18058 the base type is signed. */
18060 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
18061 if (low
.kind
== PROP_CONST
18062 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
18063 low
.data
.const_val
|= negative_mask
;
18064 if (high
.kind
== PROP_CONST
18065 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
18066 high
.data
.const_val
|= negative_mask
;
18068 /* Check for bit and byte strides. */
18069 struct dynamic_prop byte_stride_prop
;
18070 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
18071 if (attr_byte_stride
!= nullptr)
18073 struct type
*prop_type
18074 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
18075 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
18079 struct dynamic_prop bit_stride_prop
;
18080 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
18081 if (attr_bit_stride
!= nullptr)
18083 /* It only makes sense to have either a bit or byte stride. */
18084 if (attr_byte_stride
!= nullptr)
18086 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
18087 "- DIE at %s [in module %s]"),
18088 sect_offset_str (die
->sect_off
),
18089 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
18090 attr_bit_stride
= nullptr;
18094 struct type
*prop_type
18095 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
18096 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
18101 if (attr_byte_stride
!= nullptr
18102 || attr_bit_stride
!= nullptr)
18104 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
18105 struct dynamic_prop
*stride
18106 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
18109 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
18110 &high
, bias
, stride
, byte_stride_p
);
18113 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
18115 if (high_bound_is_count
)
18116 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
18118 /* Ada expects an empty array on no boundary attributes. */
18119 if (attr
== NULL
&& cu
->language
!= language_ada
)
18120 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
18122 name
= dwarf2_name (die
, cu
);
18124 TYPE_NAME (range_type
) = name
;
18126 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
18127 if (attr
!= nullptr)
18128 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
18130 maybe_set_alignment (cu
, die
, range_type
);
18132 set_die_type (die
, range_type
, cu
);
18134 /* set_die_type should be already done. */
18135 set_descriptive_type (range_type
, die
, cu
);
18140 static struct type
*
18141 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18145 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
18147 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
18149 /* In Ada, an unspecified type is typically used when the description
18150 of the type is deferred to a different unit. When encountering
18151 such a type, we treat it as a stub, and try to resolve it later on,
18153 if (cu
->language
== language_ada
)
18154 TYPE_STUB (type
) = 1;
18156 return set_die_type (die
, type
, cu
);
18159 /* Read a single die and all its descendents. Set the die's sibling
18160 field to NULL; set other fields in the die correctly, and set all
18161 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
18162 location of the info_ptr after reading all of those dies. PARENT
18163 is the parent of the die in question. */
18165 static struct die_info
*
18166 read_die_and_children (const struct die_reader_specs
*reader
,
18167 const gdb_byte
*info_ptr
,
18168 const gdb_byte
**new_info_ptr
,
18169 struct die_info
*parent
)
18171 struct die_info
*die
;
18172 const gdb_byte
*cur_ptr
;
18175 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
18178 *new_info_ptr
= cur_ptr
;
18181 store_in_ref_table (die
, reader
->cu
);
18184 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
18188 *new_info_ptr
= cur_ptr
;
18191 die
->sibling
= NULL
;
18192 die
->parent
= parent
;
18196 /* Read a die, all of its descendents, and all of its siblings; set
18197 all of the fields of all of the dies correctly. Arguments are as
18198 in read_die_and_children. */
18200 static struct die_info
*
18201 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18202 const gdb_byte
*info_ptr
,
18203 const gdb_byte
**new_info_ptr
,
18204 struct die_info
*parent
)
18206 struct die_info
*first_die
, *last_sibling
;
18207 const gdb_byte
*cur_ptr
;
18209 cur_ptr
= info_ptr
;
18210 first_die
= last_sibling
= NULL
;
18214 struct die_info
*die
18215 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18219 *new_info_ptr
= cur_ptr
;
18226 last_sibling
->sibling
= die
;
18228 last_sibling
= die
;
18232 /* Read a die, all of its descendents, and all of its siblings; set
18233 all of the fields of all of the dies correctly. Arguments are as
18234 in read_die_and_children.
18235 This the main entry point for reading a DIE and all its children. */
18237 static struct die_info
*
18238 read_die_and_siblings (const struct die_reader_specs
*reader
,
18239 const gdb_byte
*info_ptr
,
18240 const gdb_byte
**new_info_ptr
,
18241 struct die_info
*parent
)
18243 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18244 new_info_ptr
, parent
);
18246 if (dwarf_die_debug
)
18248 fprintf_unfiltered (gdb_stdlog
,
18249 "Read die from %s@0x%x of %s:\n",
18250 get_section_name (reader
->die_section
),
18251 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18252 bfd_get_filename (reader
->abfd
));
18253 dump_die (die
, dwarf_die_debug
);
18259 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18261 The caller is responsible for filling in the extra attributes
18262 and updating (*DIEP)->num_attrs.
18263 Set DIEP to point to a newly allocated die with its information,
18264 except for its child, sibling, and parent fields.
18265 Set HAS_CHILDREN to tell whether the die has children or not. */
18267 static const gdb_byte
*
18268 read_full_die_1 (const struct die_reader_specs
*reader
,
18269 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18270 int *has_children
, int num_extra_attrs
)
18272 unsigned int abbrev_number
, bytes_read
, i
;
18273 struct abbrev_info
*abbrev
;
18274 struct die_info
*die
;
18275 struct dwarf2_cu
*cu
= reader
->cu
;
18276 bfd
*abfd
= reader
->abfd
;
18278 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18279 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18280 info_ptr
+= bytes_read
;
18281 if (!abbrev_number
)
18288 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18290 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18292 bfd_get_filename (abfd
));
18294 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18295 die
->sect_off
= sect_off
;
18296 die
->tag
= abbrev
->tag
;
18297 die
->abbrev
= abbrev_number
;
18299 /* Make the result usable.
18300 The caller needs to update num_attrs after adding the extra
18302 die
->num_attrs
= abbrev
->num_attrs
;
18304 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18305 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18309 *has_children
= abbrev
->has_children
;
18313 /* Read a die and all its attributes.
18314 Set DIEP to point to a newly allocated die with its information,
18315 except for its child, sibling, and parent fields.
18316 Set HAS_CHILDREN to tell whether the die has children or not. */
18318 static const gdb_byte
*
18319 read_full_die (const struct die_reader_specs
*reader
,
18320 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18323 const gdb_byte
*result
;
18325 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18327 if (dwarf_die_debug
)
18329 fprintf_unfiltered (gdb_stdlog
,
18330 "Read die from %s@0x%x of %s:\n",
18331 get_section_name (reader
->die_section
),
18332 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18333 bfd_get_filename (reader
->abfd
));
18334 dump_die (*diep
, dwarf_die_debug
);
18340 /* Abbreviation tables.
18342 In DWARF version 2, the description of the debugging information is
18343 stored in a separate .debug_abbrev section. Before we read any
18344 dies from a section we read in all abbreviations and install them
18345 in a hash table. */
18347 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18349 struct abbrev_info
*
18350 abbrev_table::alloc_abbrev ()
18352 struct abbrev_info
*abbrev
;
18354 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18355 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18360 /* Add an abbreviation to the table. */
18363 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18364 struct abbrev_info
*abbrev
)
18366 unsigned int hash_number
;
18368 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18369 abbrev
->next
= m_abbrevs
[hash_number
];
18370 m_abbrevs
[hash_number
] = abbrev
;
18373 /* Look up an abbrev in the table.
18374 Returns NULL if the abbrev is not found. */
18376 struct abbrev_info
*
18377 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18379 unsigned int hash_number
;
18380 struct abbrev_info
*abbrev
;
18382 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18383 abbrev
= m_abbrevs
[hash_number
];
18387 if (abbrev
->number
== abbrev_number
)
18389 abbrev
= abbrev
->next
;
18394 /* Read in an abbrev table. */
18396 static abbrev_table_up
18397 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18398 struct dwarf2_section_info
*section
,
18399 sect_offset sect_off
)
18401 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18402 bfd
*abfd
= get_section_bfd_owner (section
);
18403 const gdb_byte
*abbrev_ptr
;
18404 struct abbrev_info
*cur_abbrev
;
18405 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18406 unsigned int abbrev_form
;
18407 struct attr_abbrev
*cur_attrs
;
18408 unsigned int allocated_attrs
;
18410 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18412 dwarf2_read_section (objfile
, section
);
18413 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18414 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18415 abbrev_ptr
+= bytes_read
;
18417 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18418 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18420 /* Loop until we reach an abbrev number of 0. */
18421 while (abbrev_number
)
18423 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18425 /* read in abbrev header */
18426 cur_abbrev
->number
= abbrev_number
;
18428 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18429 abbrev_ptr
+= bytes_read
;
18430 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18433 /* now read in declarations */
18436 LONGEST implicit_const
;
18438 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18439 abbrev_ptr
+= bytes_read
;
18440 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18441 abbrev_ptr
+= bytes_read
;
18442 if (abbrev_form
== DW_FORM_implicit_const
)
18444 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18446 abbrev_ptr
+= bytes_read
;
18450 /* Initialize it due to a false compiler warning. */
18451 implicit_const
= -1;
18454 if (abbrev_name
== 0)
18457 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18459 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18461 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18464 cur_attrs
[cur_abbrev
->num_attrs
].name
18465 = (enum dwarf_attribute
) abbrev_name
;
18466 cur_attrs
[cur_abbrev
->num_attrs
].form
18467 = (enum dwarf_form
) abbrev_form
;
18468 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18469 ++cur_abbrev
->num_attrs
;
18472 cur_abbrev
->attrs
=
18473 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18474 cur_abbrev
->num_attrs
);
18475 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18476 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18478 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18480 /* Get next abbreviation.
18481 Under Irix6 the abbreviations for a compilation unit are not
18482 always properly terminated with an abbrev number of 0.
18483 Exit loop if we encounter an abbreviation which we have
18484 already read (which means we are about to read the abbreviations
18485 for the next compile unit) or if the end of the abbreviation
18486 table is reached. */
18487 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18489 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18490 abbrev_ptr
+= bytes_read
;
18491 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18496 return abbrev_table
;
18499 /* Returns nonzero if TAG represents a type that we might generate a partial
18503 is_type_tag_for_partial (int tag
)
18508 /* Some types that would be reasonable to generate partial symbols for,
18509 that we don't at present. */
18510 case DW_TAG_array_type
:
18511 case DW_TAG_file_type
:
18512 case DW_TAG_ptr_to_member_type
:
18513 case DW_TAG_set_type
:
18514 case DW_TAG_string_type
:
18515 case DW_TAG_subroutine_type
:
18517 case DW_TAG_base_type
:
18518 case DW_TAG_class_type
:
18519 case DW_TAG_interface_type
:
18520 case DW_TAG_enumeration_type
:
18521 case DW_TAG_structure_type
:
18522 case DW_TAG_subrange_type
:
18523 case DW_TAG_typedef
:
18524 case DW_TAG_union_type
:
18531 /* Load all DIEs that are interesting for partial symbols into memory. */
18533 static struct partial_die_info
*
18534 load_partial_dies (const struct die_reader_specs
*reader
,
18535 const gdb_byte
*info_ptr
, int building_psymtab
)
18537 struct dwarf2_cu
*cu
= reader
->cu
;
18538 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18539 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18540 unsigned int bytes_read
;
18541 unsigned int load_all
= 0;
18542 int nesting_level
= 1;
18547 gdb_assert (cu
->per_cu
!= NULL
);
18548 if (cu
->per_cu
->load_all_dies
)
18552 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18556 &cu
->comp_unit_obstack
,
18557 hashtab_obstack_allocate
,
18558 dummy_obstack_deallocate
);
18562 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18564 /* A NULL abbrev means the end of a series of children. */
18565 if (abbrev
== NULL
)
18567 if (--nesting_level
== 0)
18570 info_ptr
+= bytes_read
;
18571 last_die
= parent_die
;
18572 parent_die
= parent_die
->die_parent
;
18576 /* Check for template arguments. We never save these; if
18577 they're seen, we just mark the parent, and go on our way. */
18578 if (parent_die
!= NULL
18579 && cu
->language
== language_cplus
18580 && (abbrev
->tag
== DW_TAG_template_type_param
18581 || abbrev
->tag
== DW_TAG_template_value_param
))
18583 parent_die
->has_template_arguments
= 1;
18587 /* We don't need a partial DIE for the template argument. */
18588 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18593 /* We only recurse into c++ subprograms looking for template arguments.
18594 Skip their other children. */
18596 && cu
->language
== language_cplus
18597 && parent_die
!= NULL
18598 && parent_die
->tag
== DW_TAG_subprogram
)
18600 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18604 /* Check whether this DIE is interesting enough to save. Normally
18605 we would not be interested in members here, but there may be
18606 later variables referencing them via DW_AT_specification (for
18607 static members). */
18609 && !is_type_tag_for_partial (abbrev
->tag
)
18610 && abbrev
->tag
!= DW_TAG_constant
18611 && abbrev
->tag
!= DW_TAG_enumerator
18612 && abbrev
->tag
!= DW_TAG_subprogram
18613 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18614 && abbrev
->tag
!= DW_TAG_lexical_block
18615 && abbrev
->tag
!= DW_TAG_variable
18616 && abbrev
->tag
!= DW_TAG_namespace
18617 && abbrev
->tag
!= DW_TAG_module
18618 && abbrev
->tag
!= DW_TAG_member
18619 && abbrev
->tag
!= DW_TAG_imported_unit
18620 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18622 /* Otherwise we skip to the next sibling, if any. */
18623 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18627 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18630 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18632 /* This two-pass algorithm for processing partial symbols has a
18633 high cost in cache pressure. Thus, handle some simple cases
18634 here which cover the majority of C partial symbols. DIEs
18635 which neither have specification tags in them, nor could have
18636 specification tags elsewhere pointing at them, can simply be
18637 processed and discarded.
18639 This segment is also optional; scan_partial_symbols and
18640 add_partial_symbol will handle these DIEs if we chain
18641 them in normally. When compilers which do not emit large
18642 quantities of duplicate debug information are more common,
18643 this code can probably be removed. */
18645 /* Any complete simple types at the top level (pretty much all
18646 of them, for a language without namespaces), can be processed
18648 if (parent_die
== NULL
18649 && pdi
.has_specification
== 0
18650 && pdi
.is_declaration
== 0
18651 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18652 || pdi
.tag
== DW_TAG_base_type
18653 || pdi
.tag
== DW_TAG_subrange_type
))
18655 if (building_psymtab
&& pdi
.name
!= NULL
)
18656 add_psymbol_to_list (pdi
.name
, false,
18657 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18658 psymbol_placement::STATIC
,
18659 0, cu
->language
, objfile
);
18660 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18664 /* The exception for DW_TAG_typedef with has_children above is
18665 a workaround of GCC PR debug/47510. In the case of this complaint
18666 type_name_or_error will error on such types later.
18668 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18669 it could not find the child DIEs referenced later, this is checked
18670 above. In correct DWARF DW_TAG_typedef should have no children. */
18672 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18673 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18674 "- DIE at %s [in module %s]"),
18675 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18677 /* If we're at the second level, and we're an enumerator, and
18678 our parent has no specification (meaning possibly lives in a
18679 namespace elsewhere), then we can add the partial symbol now
18680 instead of queueing it. */
18681 if (pdi
.tag
== DW_TAG_enumerator
18682 && parent_die
!= NULL
18683 && parent_die
->die_parent
== NULL
18684 && parent_die
->tag
== DW_TAG_enumeration_type
18685 && parent_die
->has_specification
== 0)
18687 if (pdi
.name
== NULL
)
18688 complaint (_("malformed enumerator DIE ignored"));
18689 else if (building_psymtab
)
18690 add_psymbol_to_list (pdi
.name
, false,
18691 VAR_DOMAIN
, LOC_CONST
, -1,
18692 cu
->language
== language_cplus
18693 ? psymbol_placement::GLOBAL
18694 : psymbol_placement::STATIC
,
18695 0, cu
->language
, objfile
);
18697 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18701 struct partial_die_info
*part_die
18702 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18704 /* We'll save this DIE so link it in. */
18705 part_die
->die_parent
= parent_die
;
18706 part_die
->die_sibling
= NULL
;
18707 part_die
->die_child
= NULL
;
18709 if (last_die
&& last_die
== parent_die
)
18710 last_die
->die_child
= part_die
;
18712 last_die
->die_sibling
= part_die
;
18714 last_die
= part_die
;
18716 if (first_die
== NULL
)
18717 first_die
= part_die
;
18719 /* Maybe add the DIE to the hash table. Not all DIEs that we
18720 find interesting need to be in the hash table, because we
18721 also have the parent/sibling/child chains; only those that we
18722 might refer to by offset later during partial symbol reading.
18724 For now this means things that might have be the target of a
18725 DW_AT_specification, DW_AT_abstract_origin, or
18726 DW_AT_extension. DW_AT_extension will refer only to
18727 namespaces; DW_AT_abstract_origin refers to functions (and
18728 many things under the function DIE, but we do not recurse
18729 into function DIEs during partial symbol reading) and
18730 possibly variables as well; DW_AT_specification refers to
18731 declarations. Declarations ought to have the DW_AT_declaration
18732 flag. It happens that GCC forgets to put it in sometimes, but
18733 only for functions, not for types.
18735 Adding more things than necessary to the hash table is harmless
18736 except for the performance cost. Adding too few will result in
18737 wasted time in find_partial_die, when we reread the compilation
18738 unit with load_all_dies set. */
18741 || abbrev
->tag
== DW_TAG_constant
18742 || abbrev
->tag
== DW_TAG_subprogram
18743 || abbrev
->tag
== DW_TAG_variable
18744 || abbrev
->tag
== DW_TAG_namespace
18745 || part_die
->is_declaration
)
18749 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18750 to_underlying (part_die
->sect_off
),
18755 /* For some DIEs we want to follow their children (if any). For C
18756 we have no reason to follow the children of structures; for other
18757 languages we have to, so that we can get at method physnames
18758 to infer fully qualified class names, for DW_AT_specification,
18759 and for C++ template arguments. For C++, we also look one level
18760 inside functions to find template arguments (if the name of the
18761 function does not already contain the template arguments).
18763 For Ada and Fortran, we need to scan the children of subprograms
18764 and lexical blocks as well because these languages allow the
18765 definition of nested entities that could be interesting for the
18766 debugger, such as nested subprograms for instance. */
18767 if (last_die
->has_children
18769 || last_die
->tag
== DW_TAG_namespace
18770 || last_die
->tag
== DW_TAG_module
18771 || last_die
->tag
== DW_TAG_enumeration_type
18772 || (cu
->language
== language_cplus
18773 && last_die
->tag
== DW_TAG_subprogram
18774 && (last_die
->name
== NULL
18775 || strchr (last_die
->name
, '<') == NULL
))
18776 || (cu
->language
!= language_c
18777 && (last_die
->tag
== DW_TAG_class_type
18778 || last_die
->tag
== DW_TAG_interface_type
18779 || last_die
->tag
== DW_TAG_structure_type
18780 || last_die
->tag
== DW_TAG_union_type
))
18781 || ((cu
->language
== language_ada
18782 || cu
->language
== language_fortran
)
18783 && (last_die
->tag
== DW_TAG_subprogram
18784 || last_die
->tag
== DW_TAG_lexical_block
))))
18787 parent_die
= last_die
;
18791 /* Otherwise we skip to the next sibling, if any. */
18792 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18794 /* Back to the top, do it again. */
18798 partial_die_info::partial_die_info (sect_offset sect_off_
,
18799 struct abbrev_info
*abbrev
)
18800 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18804 /* Read a minimal amount of information into the minimal die structure.
18805 INFO_PTR should point just after the initial uleb128 of a DIE. */
18808 partial_die_info::read (const struct die_reader_specs
*reader
,
18809 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18811 struct dwarf2_cu
*cu
= reader
->cu
;
18812 struct dwarf2_per_objfile
*dwarf2_per_objfile
18813 = cu
->per_cu
->dwarf2_per_objfile
;
18815 int has_low_pc_attr
= 0;
18816 int has_high_pc_attr
= 0;
18817 int high_pc_relative
= 0;
18819 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18821 struct attribute attr
;
18823 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18825 /* Store the data if it is of an attribute we want to keep in a
18826 partial symbol table. */
18832 case DW_TAG_compile_unit
:
18833 case DW_TAG_partial_unit
:
18834 case DW_TAG_type_unit
:
18835 /* Compilation units have a DW_AT_name that is a filename, not
18836 a source language identifier. */
18837 case DW_TAG_enumeration_type
:
18838 case DW_TAG_enumerator
:
18839 /* These tags always have simple identifiers already; no need
18840 to canonicalize them. */
18841 name
= DW_STRING (&attr
);
18845 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18848 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18849 &objfile
->per_bfd
->storage_obstack
);
18854 case DW_AT_linkage_name
:
18855 case DW_AT_MIPS_linkage_name
:
18856 /* Note that both forms of linkage name might appear. We
18857 assume they will be the same, and we only store the last
18859 linkage_name
= DW_STRING (&attr
);
18862 has_low_pc_attr
= 1;
18863 lowpc
= attr_value_as_address (&attr
);
18865 case DW_AT_high_pc
:
18866 has_high_pc_attr
= 1;
18867 highpc
= attr_value_as_address (&attr
);
18868 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18869 high_pc_relative
= 1;
18871 case DW_AT_location
:
18872 /* Support the .debug_loc offsets. */
18873 if (attr_form_is_block (&attr
))
18875 d
.locdesc
= DW_BLOCK (&attr
);
18877 else if (attr_form_is_section_offset (&attr
))
18879 dwarf2_complex_location_expr_complaint ();
18883 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18884 "partial symbol information");
18887 case DW_AT_external
:
18888 is_external
= DW_UNSND (&attr
);
18890 case DW_AT_declaration
:
18891 is_declaration
= DW_UNSND (&attr
);
18896 case DW_AT_abstract_origin
:
18897 case DW_AT_specification
:
18898 case DW_AT_extension
:
18899 has_specification
= 1;
18900 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18901 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18902 || cu
->per_cu
->is_dwz
);
18904 case DW_AT_sibling
:
18905 /* Ignore absolute siblings, they might point outside of
18906 the current compile unit. */
18907 if (attr
.form
== DW_FORM_ref_addr
)
18908 complaint (_("ignoring absolute DW_AT_sibling"));
18911 const gdb_byte
*buffer
= reader
->buffer
;
18912 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18913 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18915 if (sibling_ptr
< info_ptr
)
18916 complaint (_("DW_AT_sibling points backwards"));
18917 else if (sibling_ptr
> reader
->buffer_end
)
18918 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18920 sibling
= sibling_ptr
;
18923 case DW_AT_byte_size
:
18926 case DW_AT_const_value
:
18927 has_const_value
= 1;
18929 case DW_AT_calling_convention
:
18930 /* DWARF doesn't provide a way to identify a program's source-level
18931 entry point. DW_AT_calling_convention attributes are only meant
18932 to describe functions' calling conventions.
18934 However, because it's a necessary piece of information in
18935 Fortran, and before DWARF 4 DW_CC_program was the only
18936 piece of debugging information whose definition refers to
18937 a 'main program' at all, several compilers marked Fortran
18938 main programs with DW_CC_program --- even when those
18939 functions use the standard calling conventions.
18941 Although DWARF now specifies a way to provide this
18942 information, we support this practice for backward
18944 if (DW_UNSND (&attr
) == DW_CC_program
18945 && cu
->language
== language_fortran
)
18946 main_subprogram
= 1;
18949 if (DW_UNSND (&attr
) == DW_INL_inlined
18950 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18951 may_be_inlined
= 1;
18955 if (tag
== DW_TAG_imported_unit
)
18957 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18958 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18959 || cu
->per_cu
->is_dwz
);
18963 case DW_AT_main_subprogram
:
18964 main_subprogram
= DW_UNSND (&attr
);
18969 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18970 but that requires a full DIE, so instead we just
18972 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18973 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18974 + (need_ranges_base
18978 /* Value of the DW_AT_ranges attribute is the offset in the
18979 .debug_ranges section. */
18980 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18991 /* For Ada, if both the name and the linkage name appear, we prefer
18992 the latter. This lets "catch exception" work better, regardless
18993 of the order in which the name and linkage name were emitted.
18994 Really, though, this is just a workaround for the fact that gdb
18995 doesn't store both the name and the linkage name. */
18996 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18997 name
= linkage_name
;
18999 if (high_pc_relative
)
19002 if (has_low_pc_attr
&& has_high_pc_attr
)
19004 /* When using the GNU linker, .gnu.linkonce. sections are used to
19005 eliminate duplicate copies of functions and vtables and such.
19006 The linker will arbitrarily choose one and discard the others.
19007 The AT_*_pc values for such functions refer to local labels in
19008 these sections. If the section from that file was discarded, the
19009 labels are not in the output, so the relocs get a value of 0.
19010 If this is a discarded function, mark the pc bounds as invalid,
19011 so that GDB will ignore it. */
19012 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
19014 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19015 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19017 complaint (_("DW_AT_low_pc %s is zero "
19018 "for DIE at %s [in module %s]"),
19019 paddress (gdbarch
, lowpc
),
19020 sect_offset_str (sect_off
),
19021 objfile_name (objfile
));
19023 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
19024 else if (lowpc
>= highpc
)
19026 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19027 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19029 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
19030 "for DIE at %s [in module %s]"),
19031 paddress (gdbarch
, lowpc
),
19032 paddress (gdbarch
, highpc
),
19033 sect_offset_str (sect_off
),
19034 objfile_name (objfile
));
19043 /* Find a cached partial DIE at OFFSET in CU. */
19045 struct partial_die_info
*
19046 dwarf2_cu::find_partial_die (sect_offset sect_off
)
19048 struct partial_die_info
*lookup_die
= NULL
;
19049 struct partial_die_info
part_die (sect_off
);
19051 lookup_die
= ((struct partial_die_info
*)
19052 htab_find_with_hash (partial_dies
, &part_die
,
19053 to_underlying (sect_off
)));
19058 /* Find a partial DIE at OFFSET, which may or may not be in CU,
19059 except in the case of .debug_types DIEs which do not reference
19060 outside their CU (they do however referencing other types via
19061 DW_FORM_ref_sig8). */
19063 static const struct cu_partial_die_info
19064 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
19066 struct dwarf2_per_objfile
*dwarf2_per_objfile
19067 = cu
->per_cu
->dwarf2_per_objfile
;
19068 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19069 struct dwarf2_per_cu_data
*per_cu
= NULL
;
19070 struct partial_die_info
*pd
= NULL
;
19072 if (offset_in_dwz
== cu
->per_cu
->is_dwz
19073 && offset_in_cu_p (&cu
->header
, sect_off
))
19075 pd
= cu
->find_partial_die (sect_off
);
19078 /* We missed recording what we needed.
19079 Load all dies and try again. */
19080 per_cu
= cu
->per_cu
;
19084 /* TUs don't reference other CUs/TUs (except via type signatures). */
19085 if (cu
->per_cu
->is_debug_types
)
19087 error (_("Dwarf Error: Type Unit at offset %s contains"
19088 " external reference to offset %s [in module %s].\n"),
19089 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
19090 bfd_get_filename (objfile
->obfd
));
19092 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
19093 dwarf2_per_objfile
);
19095 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
19096 load_partial_comp_unit (per_cu
);
19098 per_cu
->cu
->last_used
= 0;
19099 pd
= per_cu
->cu
->find_partial_die (sect_off
);
19102 /* If we didn't find it, and not all dies have been loaded,
19103 load them all and try again. */
19105 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
19107 per_cu
->load_all_dies
= 1;
19109 /* This is nasty. When we reread the DIEs, somewhere up the call chain
19110 THIS_CU->cu may already be in use. So we can't just free it and
19111 replace its DIEs with the ones we read in. Instead, we leave those
19112 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
19113 and clobber THIS_CU->cu->partial_dies with the hash table for the new
19115 load_partial_comp_unit (per_cu
);
19117 pd
= per_cu
->cu
->find_partial_die (sect_off
);
19121 internal_error (__FILE__
, __LINE__
,
19122 _("could not find partial DIE %s "
19123 "in cache [from module %s]\n"),
19124 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
19125 return { per_cu
->cu
, pd
};
19128 /* See if we can figure out if the class lives in a namespace. We do
19129 this by looking for a member function; its demangled name will
19130 contain namespace info, if there is any. */
19133 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
19134 struct dwarf2_cu
*cu
)
19136 /* NOTE: carlton/2003-10-07: Getting the info this way changes
19137 what template types look like, because the demangler
19138 frequently doesn't give the same name as the debug info. We
19139 could fix this by only using the demangled name to get the
19140 prefix (but see comment in read_structure_type). */
19142 struct partial_die_info
*real_pdi
;
19143 struct partial_die_info
*child_pdi
;
19145 /* If this DIE (this DIE's specification, if any) has a parent, then
19146 we should not do this. We'll prepend the parent's fully qualified
19147 name when we create the partial symbol. */
19149 real_pdi
= struct_pdi
;
19150 while (real_pdi
->has_specification
)
19152 auto res
= find_partial_die (real_pdi
->spec_offset
,
19153 real_pdi
->spec_is_dwz
, cu
);
19154 real_pdi
= res
.pdi
;
19158 if (real_pdi
->die_parent
!= NULL
)
19161 for (child_pdi
= struct_pdi
->die_child
;
19163 child_pdi
= child_pdi
->die_sibling
)
19165 if (child_pdi
->tag
== DW_TAG_subprogram
19166 && child_pdi
->linkage_name
!= NULL
)
19168 char *actual_class_name
19169 = language_class_name_from_physname (cu
->language_defn
,
19170 child_pdi
->linkage_name
);
19171 if (actual_class_name
!= NULL
)
19173 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19175 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
19176 actual_class_name
);
19177 xfree (actual_class_name
);
19185 partial_die_info::fixup (struct dwarf2_cu
*cu
)
19187 /* Once we've fixed up a die, there's no point in doing so again.
19188 This also avoids a memory leak if we were to call
19189 guess_partial_die_structure_name multiple times. */
19193 /* If we found a reference attribute and the DIE has no name, try
19194 to find a name in the referred to DIE. */
19196 if (name
== NULL
&& has_specification
)
19198 struct partial_die_info
*spec_die
;
19200 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19201 spec_die
= res
.pdi
;
19204 spec_die
->fixup (cu
);
19206 if (spec_die
->name
)
19208 name
= spec_die
->name
;
19210 /* Copy DW_AT_external attribute if it is set. */
19211 if (spec_die
->is_external
)
19212 is_external
= spec_die
->is_external
;
19216 /* Set default names for some unnamed DIEs. */
19218 if (name
== NULL
&& tag
== DW_TAG_namespace
)
19219 name
= CP_ANONYMOUS_NAMESPACE_STR
;
19221 /* If there is no parent die to provide a namespace, and there are
19222 children, see if we can determine the namespace from their linkage
19224 if (cu
->language
== language_cplus
19225 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
19226 && die_parent
== NULL
19228 && (tag
== DW_TAG_class_type
19229 || tag
== DW_TAG_structure_type
19230 || tag
== DW_TAG_union_type
))
19231 guess_partial_die_structure_name (this, cu
);
19233 /* GCC might emit a nameless struct or union that has a linkage
19234 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19236 && (tag
== DW_TAG_class_type
19237 || tag
== DW_TAG_interface_type
19238 || tag
== DW_TAG_structure_type
19239 || tag
== DW_TAG_union_type
)
19240 && linkage_name
!= NULL
)
19244 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
19249 /* Strip any leading namespaces/classes, keep only the base name.
19250 DW_AT_name for named DIEs does not contain the prefixes. */
19251 base
= strrchr (demangled
, ':');
19252 if (base
&& base
> demangled
&& base
[-1] == ':')
19257 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19258 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, base
);
19266 /* Read an attribute value described by an attribute form. */
19268 static const gdb_byte
*
19269 read_attribute_value (const struct die_reader_specs
*reader
,
19270 struct attribute
*attr
, unsigned form
,
19271 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19273 struct dwarf2_cu
*cu
= reader
->cu
;
19274 struct dwarf2_per_objfile
*dwarf2_per_objfile
19275 = cu
->per_cu
->dwarf2_per_objfile
;
19276 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19277 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19278 bfd
*abfd
= reader
->abfd
;
19279 struct comp_unit_head
*cu_header
= &cu
->header
;
19280 unsigned int bytes_read
;
19281 struct dwarf_block
*blk
;
19283 attr
->form
= (enum dwarf_form
) form
;
19286 case DW_FORM_ref_addr
:
19287 if (cu
->header
.version
== 2)
19288 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19290 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
19291 &cu
->header
, &bytes_read
);
19292 info_ptr
+= bytes_read
;
19294 case DW_FORM_GNU_ref_alt
:
19295 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19296 info_ptr
+= bytes_read
;
19299 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19300 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19301 info_ptr
+= bytes_read
;
19303 case DW_FORM_block2
:
19304 blk
= dwarf_alloc_block (cu
);
19305 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19307 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19308 info_ptr
+= blk
->size
;
19309 DW_BLOCK (attr
) = blk
;
19311 case DW_FORM_block4
:
19312 blk
= dwarf_alloc_block (cu
);
19313 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19315 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19316 info_ptr
+= blk
->size
;
19317 DW_BLOCK (attr
) = blk
;
19319 case DW_FORM_data2
:
19320 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19323 case DW_FORM_data4
:
19324 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19327 case DW_FORM_data8
:
19328 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19331 case DW_FORM_data16
:
19332 blk
= dwarf_alloc_block (cu
);
19334 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19336 DW_BLOCK (attr
) = blk
;
19338 case DW_FORM_sec_offset
:
19339 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19340 info_ptr
+= bytes_read
;
19342 case DW_FORM_string
:
19343 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19344 DW_STRING_IS_CANONICAL (attr
) = 0;
19345 info_ptr
+= bytes_read
;
19348 if (!cu
->per_cu
->is_dwz
)
19350 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19351 abfd
, info_ptr
, cu_header
,
19353 DW_STRING_IS_CANONICAL (attr
) = 0;
19354 info_ptr
+= bytes_read
;
19358 case DW_FORM_line_strp
:
19359 if (!cu
->per_cu
->is_dwz
)
19361 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19363 cu_header
, &bytes_read
);
19364 DW_STRING_IS_CANONICAL (attr
) = 0;
19365 info_ptr
+= bytes_read
;
19369 case DW_FORM_GNU_strp_alt
:
19371 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19372 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19375 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19377 DW_STRING_IS_CANONICAL (attr
) = 0;
19378 info_ptr
+= bytes_read
;
19381 case DW_FORM_exprloc
:
19382 case DW_FORM_block
:
19383 blk
= dwarf_alloc_block (cu
);
19384 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19385 info_ptr
+= bytes_read
;
19386 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19387 info_ptr
+= blk
->size
;
19388 DW_BLOCK (attr
) = blk
;
19390 case DW_FORM_block1
:
19391 blk
= dwarf_alloc_block (cu
);
19392 blk
->size
= read_1_byte (abfd
, info_ptr
);
19394 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19395 info_ptr
+= blk
->size
;
19396 DW_BLOCK (attr
) = blk
;
19398 case DW_FORM_data1
:
19399 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19403 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19406 case DW_FORM_flag_present
:
19407 DW_UNSND (attr
) = 1;
19409 case DW_FORM_sdata
:
19410 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19411 info_ptr
+= bytes_read
;
19413 case DW_FORM_udata
:
19414 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19415 info_ptr
+= bytes_read
;
19418 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19419 + read_1_byte (abfd
, info_ptr
));
19423 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19424 + read_2_bytes (abfd
, info_ptr
));
19428 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19429 + read_4_bytes (abfd
, info_ptr
));
19433 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19434 + read_8_bytes (abfd
, info_ptr
));
19437 case DW_FORM_ref_sig8
:
19438 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19441 case DW_FORM_ref_udata
:
19442 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19443 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19444 info_ptr
+= bytes_read
;
19446 case DW_FORM_indirect
:
19447 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19448 info_ptr
+= bytes_read
;
19449 if (form
== DW_FORM_implicit_const
)
19451 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19452 info_ptr
+= bytes_read
;
19454 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19457 case DW_FORM_implicit_const
:
19458 DW_SND (attr
) = implicit_const
;
19460 case DW_FORM_addrx
:
19461 case DW_FORM_GNU_addr_index
:
19462 if (reader
->dwo_file
== NULL
)
19464 /* For now flag a hard error.
19465 Later we can turn this into a complaint. */
19466 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19467 dwarf_form_name (form
),
19468 bfd_get_filename (abfd
));
19470 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19471 info_ptr
+= bytes_read
;
19474 case DW_FORM_strx1
:
19475 case DW_FORM_strx2
:
19476 case DW_FORM_strx3
:
19477 case DW_FORM_strx4
:
19478 case DW_FORM_GNU_str_index
:
19479 if (reader
->dwo_file
== NULL
)
19481 /* For now flag a hard error.
19482 Later we can turn this into a complaint if warranted. */
19483 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19484 dwarf_form_name (form
),
19485 bfd_get_filename (abfd
));
19488 ULONGEST str_index
;
19489 if (form
== DW_FORM_strx1
)
19491 str_index
= read_1_byte (abfd
, info_ptr
);
19494 else if (form
== DW_FORM_strx2
)
19496 str_index
= read_2_bytes (abfd
, info_ptr
);
19499 else if (form
== DW_FORM_strx3
)
19501 str_index
= read_3_bytes (abfd
, info_ptr
);
19504 else if (form
== DW_FORM_strx4
)
19506 str_index
= read_4_bytes (abfd
, info_ptr
);
19511 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19512 info_ptr
+= bytes_read
;
19514 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19515 DW_STRING_IS_CANONICAL (attr
) = 0;
19519 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19520 dwarf_form_name (form
),
19521 bfd_get_filename (abfd
));
19525 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19526 attr
->form
= DW_FORM_GNU_ref_alt
;
19528 /* We have seen instances where the compiler tried to emit a byte
19529 size attribute of -1 which ended up being encoded as an unsigned
19530 0xffffffff. Although 0xffffffff is technically a valid size value,
19531 an object of this size seems pretty unlikely so we can relatively
19532 safely treat these cases as if the size attribute was invalid and
19533 treat them as zero by default. */
19534 if (attr
->name
== DW_AT_byte_size
19535 && form
== DW_FORM_data4
19536 && DW_UNSND (attr
) >= 0xffffffff)
19539 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19540 hex_string (DW_UNSND (attr
)));
19541 DW_UNSND (attr
) = 0;
19547 /* Read an attribute described by an abbreviated attribute. */
19549 static const gdb_byte
*
19550 read_attribute (const struct die_reader_specs
*reader
,
19551 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19552 const gdb_byte
*info_ptr
)
19554 attr
->name
= abbrev
->name
;
19555 return read_attribute_value (reader
, attr
, abbrev
->form
,
19556 abbrev
->implicit_const
, info_ptr
);
19559 /* Read dwarf information from a buffer. */
19561 static unsigned int
19562 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19564 return bfd_get_8 (abfd
, buf
);
19568 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19570 return bfd_get_signed_8 (abfd
, buf
);
19573 static unsigned int
19574 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19576 return bfd_get_16 (abfd
, buf
);
19580 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19582 return bfd_get_signed_16 (abfd
, buf
);
19585 static unsigned int
19586 read_3_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19588 unsigned int result
= 0;
19589 for (int i
= 0; i
< 3; ++i
)
19591 unsigned char byte
= bfd_get_8 (abfd
, buf
);
19593 result
|= ((unsigned int) byte
<< (i
* 8));
19598 static unsigned int
19599 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19601 return bfd_get_32 (abfd
, buf
);
19605 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19607 return bfd_get_signed_32 (abfd
, buf
);
19611 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19613 return bfd_get_64 (abfd
, buf
);
19617 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19618 unsigned int *bytes_read
)
19620 struct comp_unit_head
*cu_header
= &cu
->header
;
19621 CORE_ADDR retval
= 0;
19623 if (cu_header
->signed_addr_p
)
19625 switch (cu_header
->addr_size
)
19628 retval
= bfd_get_signed_16 (abfd
, buf
);
19631 retval
= bfd_get_signed_32 (abfd
, buf
);
19634 retval
= bfd_get_signed_64 (abfd
, buf
);
19637 internal_error (__FILE__
, __LINE__
,
19638 _("read_address: bad switch, signed [in module %s]"),
19639 bfd_get_filename (abfd
));
19644 switch (cu_header
->addr_size
)
19647 retval
= bfd_get_16 (abfd
, buf
);
19650 retval
= bfd_get_32 (abfd
, buf
);
19653 retval
= bfd_get_64 (abfd
, buf
);
19656 internal_error (__FILE__
, __LINE__
,
19657 _("read_address: bad switch, "
19658 "unsigned [in module %s]"),
19659 bfd_get_filename (abfd
));
19663 *bytes_read
= cu_header
->addr_size
;
19667 /* Read the initial length from a section. The (draft) DWARF 3
19668 specification allows the initial length to take up either 4 bytes
19669 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19670 bytes describe the length and all offsets will be 8 bytes in length
19673 An older, non-standard 64-bit format is also handled by this
19674 function. The older format in question stores the initial length
19675 as an 8-byte quantity without an escape value. Lengths greater
19676 than 2^32 aren't very common which means that the initial 4 bytes
19677 is almost always zero. Since a length value of zero doesn't make
19678 sense for the 32-bit format, this initial zero can be considered to
19679 be an escape value which indicates the presence of the older 64-bit
19680 format. As written, the code can't detect (old format) lengths
19681 greater than 4GB. If it becomes necessary to handle lengths
19682 somewhat larger than 4GB, we could allow other small values (such
19683 as the non-sensical values of 1, 2, and 3) to also be used as
19684 escape values indicating the presence of the old format.
19686 The value returned via bytes_read should be used to increment the
19687 relevant pointer after calling read_initial_length().
19689 [ Note: read_initial_length() and read_offset() are based on the
19690 document entitled "DWARF Debugging Information Format", revision
19691 3, draft 8, dated November 19, 2001. This document was obtained
19694 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19696 This document is only a draft and is subject to change. (So beware.)
19698 Details regarding the older, non-standard 64-bit format were
19699 determined empirically by examining 64-bit ELF files produced by
19700 the SGI toolchain on an IRIX 6.5 machine.
19702 - Kevin, July 16, 2002
19706 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19708 LONGEST length
= bfd_get_32 (abfd
, buf
);
19710 if (length
== 0xffffffff)
19712 length
= bfd_get_64 (abfd
, buf
+ 4);
19715 else if (length
== 0)
19717 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19718 length
= bfd_get_64 (abfd
, buf
);
19729 /* Cover function for read_initial_length.
19730 Returns the length of the object at BUF, and stores the size of the
19731 initial length in *BYTES_READ and stores the size that offsets will be in
19733 If the initial length size is not equivalent to that specified in
19734 CU_HEADER then issue a complaint.
19735 This is useful when reading non-comp-unit headers. */
19738 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19739 const struct comp_unit_head
*cu_header
,
19740 unsigned int *bytes_read
,
19741 unsigned int *offset_size
)
19743 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19745 gdb_assert (cu_header
->initial_length_size
== 4
19746 || cu_header
->initial_length_size
== 8
19747 || cu_header
->initial_length_size
== 12);
19749 if (cu_header
->initial_length_size
!= *bytes_read
)
19750 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19752 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19756 /* Read an offset from the data stream. The size of the offset is
19757 given by cu_header->offset_size. */
19760 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19761 const struct comp_unit_head
*cu_header
,
19762 unsigned int *bytes_read
)
19764 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19766 *bytes_read
= cu_header
->offset_size
;
19770 /* Read an offset from the data stream. */
19773 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19775 LONGEST retval
= 0;
19777 switch (offset_size
)
19780 retval
= bfd_get_32 (abfd
, buf
);
19783 retval
= bfd_get_64 (abfd
, buf
);
19786 internal_error (__FILE__
, __LINE__
,
19787 _("read_offset_1: bad switch [in module %s]"),
19788 bfd_get_filename (abfd
));
19794 static const gdb_byte
*
19795 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19797 /* If the size of a host char is 8 bits, we can return a pointer
19798 to the buffer, otherwise we have to copy the data to a buffer
19799 allocated on the temporary obstack. */
19800 gdb_assert (HOST_CHAR_BIT
== 8);
19804 static const char *
19805 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19806 unsigned int *bytes_read_ptr
)
19808 /* If the size of a host char is 8 bits, we can return a pointer
19809 to the string, otherwise we have to copy the string to a buffer
19810 allocated on the temporary obstack. */
19811 gdb_assert (HOST_CHAR_BIT
== 8);
19814 *bytes_read_ptr
= 1;
19817 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19818 return (const char *) buf
;
19821 /* Return pointer to string at section SECT offset STR_OFFSET with error
19822 reporting strings FORM_NAME and SECT_NAME. */
19824 static const char *
19825 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19826 bfd
*abfd
, LONGEST str_offset
,
19827 struct dwarf2_section_info
*sect
,
19828 const char *form_name
,
19829 const char *sect_name
)
19831 dwarf2_read_section (objfile
, sect
);
19832 if (sect
->buffer
== NULL
)
19833 error (_("%s used without %s section [in module %s]"),
19834 form_name
, sect_name
, bfd_get_filename (abfd
));
19835 if (str_offset
>= sect
->size
)
19836 error (_("%s pointing outside of %s section [in module %s]"),
19837 form_name
, sect_name
, bfd_get_filename (abfd
));
19838 gdb_assert (HOST_CHAR_BIT
== 8);
19839 if (sect
->buffer
[str_offset
] == '\0')
19841 return (const char *) (sect
->buffer
+ str_offset
);
19844 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19846 static const char *
19847 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19848 bfd
*abfd
, LONGEST str_offset
)
19850 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19852 &dwarf2_per_objfile
->str
,
19853 "DW_FORM_strp", ".debug_str");
19856 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19858 static const char *
19859 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19860 bfd
*abfd
, LONGEST str_offset
)
19862 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19864 &dwarf2_per_objfile
->line_str
,
19865 "DW_FORM_line_strp",
19866 ".debug_line_str");
19869 /* Read a string at offset STR_OFFSET in the .debug_str section from
19870 the .dwz file DWZ. Throw an error if the offset is too large. If
19871 the string consists of a single NUL byte, return NULL; otherwise
19872 return a pointer to the string. */
19874 static const char *
19875 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19876 LONGEST str_offset
)
19878 dwarf2_read_section (objfile
, &dwz
->str
);
19880 if (dwz
->str
.buffer
== NULL
)
19881 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19882 "section [in module %s]"),
19883 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19884 if (str_offset
>= dwz
->str
.size
)
19885 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19886 ".debug_str section [in module %s]"),
19887 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19888 gdb_assert (HOST_CHAR_BIT
== 8);
19889 if (dwz
->str
.buffer
[str_offset
] == '\0')
19891 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19894 /* Return pointer to string at .debug_str offset as read from BUF.
19895 BUF is assumed to be in a compilation unit described by CU_HEADER.
19896 Return *BYTES_READ_PTR count of bytes read from BUF. */
19898 static const char *
19899 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19900 const gdb_byte
*buf
,
19901 const struct comp_unit_head
*cu_header
,
19902 unsigned int *bytes_read_ptr
)
19904 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19906 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19909 /* Return pointer to string at .debug_line_str offset as read from BUF.
19910 BUF is assumed to be in a compilation unit described by CU_HEADER.
19911 Return *BYTES_READ_PTR count of bytes read from BUF. */
19913 static const char *
19914 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19915 bfd
*abfd
, const gdb_byte
*buf
,
19916 const struct comp_unit_head
*cu_header
,
19917 unsigned int *bytes_read_ptr
)
19919 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19921 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19926 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19927 unsigned int *bytes_read_ptr
)
19930 unsigned int num_read
;
19932 unsigned char byte
;
19939 byte
= bfd_get_8 (abfd
, buf
);
19942 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19943 if ((byte
& 128) == 0)
19949 *bytes_read_ptr
= num_read
;
19954 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19955 unsigned int *bytes_read_ptr
)
19958 int shift
, num_read
;
19959 unsigned char byte
;
19966 byte
= bfd_get_8 (abfd
, buf
);
19969 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19971 if ((byte
& 128) == 0)
19976 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19977 result
|= -(((ULONGEST
) 1) << shift
);
19978 *bytes_read_ptr
= num_read
;
19982 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19983 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19984 ADDR_SIZE is the size of addresses from the CU header. */
19987 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19988 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19990 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19991 bfd
*abfd
= objfile
->obfd
;
19992 const gdb_byte
*info_ptr
;
19994 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19995 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19996 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19997 objfile_name (objfile
));
19998 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19999 error (_("DW_FORM_addr_index pointing outside of "
20000 ".debug_addr section [in module %s]"),
20001 objfile_name (objfile
));
20002 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
20003 + addr_base
+ addr_index
* addr_size
);
20004 if (addr_size
== 4)
20005 return bfd_get_32 (abfd
, info_ptr
);
20007 return bfd_get_64 (abfd
, info_ptr
);
20010 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
20013 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
20015 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
20016 cu
->addr_base
, cu
->header
.addr_size
);
20019 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
20022 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
20023 unsigned int *bytes_read
)
20025 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
20026 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
20028 return read_addr_index (cu
, addr_index
);
20031 /* Data structure to pass results from dwarf2_read_addr_index_reader
20032 back to dwarf2_read_addr_index. */
20034 struct dwarf2_read_addr_index_data
20036 ULONGEST addr_base
;
20040 /* die_reader_func for dwarf2_read_addr_index. */
20043 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
20044 const gdb_byte
*info_ptr
,
20045 struct die_info
*comp_unit_die
,
20049 struct dwarf2_cu
*cu
= reader
->cu
;
20050 struct dwarf2_read_addr_index_data
*aidata
=
20051 (struct dwarf2_read_addr_index_data
*) data
;
20053 aidata
->addr_base
= cu
->addr_base
;
20054 aidata
->addr_size
= cu
->header
.addr_size
;
20057 /* Given an index in .debug_addr, fetch the value.
20058 NOTE: This can be called during dwarf expression evaluation,
20059 long after the debug information has been read, and thus per_cu->cu
20060 may no longer exist. */
20063 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
20064 unsigned int addr_index
)
20066 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
20067 struct dwarf2_cu
*cu
= per_cu
->cu
;
20068 ULONGEST addr_base
;
20071 /* We need addr_base and addr_size.
20072 If we don't have PER_CU->cu, we have to get it.
20073 Nasty, but the alternative is storing the needed info in PER_CU,
20074 which at this point doesn't seem justified: it's not clear how frequently
20075 it would get used and it would increase the size of every PER_CU.
20076 Entry points like dwarf2_per_cu_addr_size do a similar thing
20077 so we're not in uncharted territory here.
20078 Alas we need to be a bit more complicated as addr_base is contained
20081 We don't need to read the entire CU(/TU).
20082 We just need the header and top level die.
20084 IWBN to use the aging mechanism to let us lazily later discard the CU.
20085 For now we skip this optimization. */
20089 addr_base
= cu
->addr_base
;
20090 addr_size
= cu
->header
.addr_size
;
20094 struct dwarf2_read_addr_index_data aidata
;
20096 /* Note: We can't use init_cutu_and_read_dies_simple here,
20097 we need addr_base. */
20098 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
20099 dwarf2_read_addr_index_reader
, &aidata
);
20100 addr_base
= aidata
.addr_base
;
20101 addr_size
= aidata
.addr_size
;
20104 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
20108 /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string.
20109 This is only used by the Fission support. */
20111 static const char *
20112 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
20114 struct dwarf2_cu
*cu
= reader
->cu
;
20115 struct dwarf2_per_objfile
*dwarf2_per_objfile
20116 = cu
->per_cu
->dwarf2_per_objfile
;
20117 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20118 const char *objf_name
= objfile_name (objfile
);
20119 bfd
*abfd
= objfile
->obfd
;
20120 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
20121 struct dwarf2_section_info
*str_offsets_section
=
20122 &reader
->dwo_file
->sections
.str_offsets
;
20123 const gdb_byte
*info_ptr
;
20124 ULONGEST str_offset
;
20125 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
20127 dwarf2_read_section (objfile
, str_section
);
20128 dwarf2_read_section (objfile
, str_offsets_section
);
20129 if (str_section
->buffer
== NULL
)
20130 error (_("%s used without .debug_str.dwo section"
20131 " in CU at offset %s [in module %s]"),
20132 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20133 if (str_offsets_section
->buffer
== NULL
)
20134 error (_("%s used without .debug_str_offsets.dwo section"
20135 " in CU at offset %s [in module %s]"),
20136 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20137 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
20138 error (_("%s pointing outside of .debug_str_offsets.dwo"
20139 " section in CU at offset %s [in module %s]"),
20140 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20141 info_ptr
= (str_offsets_section
->buffer
20142 + str_index
* cu
->header
.offset_size
);
20143 if (cu
->header
.offset_size
== 4)
20144 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20146 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20147 if (str_offset
>= str_section
->size
)
20148 error (_("Offset from %s pointing outside of"
20149 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20150 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20151 return (const char *) (str_section
->buffer
+ str_offset
);
20154 /* Return the length of an LEB128 number in BUF. */
20157 leb128_size (const gdb_byte
*buf
)
20159 const gdb_byte
*begin
= buf
;
20165 if ((byte
& 128) == 0)
20166 return buf
- begin
;
20171 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20180 cu
->language
= language_c
;
20183 case DW_LANG_C_plus_plus
:
20184 case DW_LANG_C_plus_plus_11
:
20185 case DW_LANG_C_plus_plus_14
:
20186 cu
->language
= language_cplus
;
20189 cu
->language
= language_d
;
20191 case DW_LANG_Fortran77
:
20192 case DW_LANG_Fortran90
:
20193 case DW_LANG_Fortran95
:
20194 case DW_LANG_Fortran03
:
20195 case DW_LANG_Fortran08
:
20196 cu
->language
= language_fortran
;
20199 cu
->language
= language_go
;
20201 case DW_LANG_Mips_Assembler
:
20202 cu
->language
= language_asm
;
20204 case DW_LANG_Ada83
:
20205 case DW_LANG_Ada95
:
20206 cu
->language
= language_ada
;
20208 case DW_LANG_Modula2
:
20209 cu
->language
= language_m2
;
20211 case DW_LANG_Pascal83
:
20212 cu
->language
= language_pascal
;
20215 cu
->language
= language_objc
;
20218 case DW_LANG_Rust_old
:
20219 cu
->language
= language_rust
;
20221 case DW_LANG_Cobol74
:
20222 case DW_LANG_Cobol85
:
20224 cu
->language
= language_minimal
;
20227 cu
->language_defn
= language_def (cu
->language
);
20230 /* Return the named attribute or NULL if not there. */
20232 static struct attribute
*
20233 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20238 struct attribute
*spec
= NULL
;
20240 for (i
= 0; i
< die
->num_attrs
; ++i
)
20242 if (die
->attrs
[i
].name
== name
)
20243 return &die
->attrs
[i
];
20244 if (die
->attrs
[i
].name
== DW_AT_specification
20245 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20246 spec
= &die
->attrs
[i
];
20252 die
= follow_die_ref (die
, spec
, &cu
);
20258 /* Return the named attribute or NULL if not there,
20259 but do not follow DW_AT_specification, etc.
20260 This is for use in contexts where we're reading .debug_types dies.
20261 Following DW_AT_specification, DW_AT_abstract_origin will take us
20262 back up the chain, and we want to go down. */
20264 static struct attribute
*
20265 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
20269 for (i
= 0; i
< die
->num_attrs
; ++i
)
20270 if (die
->attrs
[i
].name
== name
)
20271 return &die
->attrs
[i
];
20276 /* Return the string associated with a string-typed attribute, or NULL if it
20277 is either not found or is of an incorrect type. */
20279 static const char *
20280 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20282 struct attribute
*attr
;
20283 const char *str
= NULL
;
20285 attr
= dwarf2_attr (die
, name
, cu
);
20289 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
20290 || attr
->form
== DW_FORM_string
20291 || attr
->form
== DW_FORM_strx
20292 || attr
->form
== DW_FORM_strx1
20293 || attr
->form
== DW_FORM_strx2
20294 || attr
->form
== DW_FORM_strx3
20295 || attr
->form
== DW_FORM_strx4
20296 || attr
->form
== DW_FORM_GNU_str_index
20297 || attr
->form
== DW_FORM_GNU_strp_alt
)
20298 str
= DW_STRING (attr
);
20300 complaint (_("string type expected for attribute %s for "
20301 "DIE at %s in module %s"),
20302 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20303 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
20309 /* Return the dwo name or NULL if not present. If present, it is in either
20310 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
20311 static const char *
20312 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20314 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
20315 if (dwo_name
== nullptr)
20316 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
20320 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20321 and holds a non-zero value. This function should only be used for
20322 DW_FORM_flag or DW_FORM_flag_present attributes. */
20325 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20327 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20329 return (attr
&& DW_UNSND (attr
));
20333 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20335 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20336 which value is non-zero. However, we have to be careful with
20337 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20338 (via dwarf2_flag_true_p) follows this attribute. So we may
20339 end up accidently finding a declaration attribute that belongs
20340 to a different DIE referenced by the specification attribute,
20341 even though the given DIE does not have a declaration attribute. */
20342 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20343 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20346 /* Return the die giving the specification for DIE, if there is
20347 one. *SPEC_CU is the CU containing DIE on input, and the CU
20348 containing the return value on output. If there is no
20349 specification, but there is an abstract origin, that is
20352 static struct die_info
*
20353 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20355 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20358 if (spec_attr
== NULL
)
20359 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20361 if (spec_attr
== NULL
)
20364 return follow_die_ref (die
, spec_attr
, spec_cu
);
20367 /* Stub for free_line_header to match void * callback types. */
20370 free_line_header_voidp (void *arg
)
20372 struct line_header
*lh
= (struct line_header
*) arg
;
20378 line_header::add_include_dir (const char *include_dir
)
20380 if (dwarf_line_debug
>= 2)
20384 new_size
= m_include_dirs
.size ();
20386 new_size
= m_include_dirs
.size () + 1;
20387 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
20388 new_size
, include_dir
);
20390 m_include_dirs
.push_back (include_dir
);
20394 line_header::add_file_name (const char *name
,
20396 unsigned int mod_time
,
20397 unsigned int length
)
20399 if (dwarf_line_debug
>= 2)
20403 new_size
= file_names_size ();
20405 new_size
= file_names_size () + 1;
20406 fprintf_unfiltered (gdb_stdlog
, "Adding file %zu: %s\n",
20409 m_file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20412 /* A convenience function to find the proper .debug_line section for a CU. */
20414 static struct dwarf2_section_info
*
20415 get_debug_line_section (struct dwarf2_cu
*cu
)
20417 struct dwarf2_section_info
*section
;
20418 struct dwarf2_per_objfile
*dwarf2_per_objfile
20419 = cu
->per_cu
->dwarf2_per_objfile
;
20421 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20423 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20424 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20425 else if (cu
->per_cu
->is_dwz
)
20427 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20429 section
= &dwz
->line
;
20432 section
= &dwarf2_per_objfile
->line
;
20437 /* Read directory or file name entry format, starting with byte of
20438 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20439 entries count and the entries themselves in the described entry
20443 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20444 bfd
*abfd
, const gdb_byte
**bufp
,
20445 struct line_header
*lh
,
20446 const struct comp_unit_head
*cu_header
,
20447 void (*callback
) (struct line_header
*lh
,
20450 unsigned int mod_time
,
20451 unsigned int length
))
20453 gdb_byte format_count
, formati
;
20454 ULONGEST data_count
, datai
;
20455 const gdb_byte
*buf
= *bufp
;
20456 const gdb_byte
*format_header_data
;
20457 unsigned int bytes_read
;
20459 format_count
= read_1_byte (abfd
, buf
);
20461 format_header_data
= buf
;
20462 for (formati
= 0; formati
< format_count
; formati
++)
20464 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20466 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20470 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20472 for (datai
= 0; datai
< data_count
; datai
++)
20474 const gdb_byte
*format
= format_header_data
;
20475 struct file_entry fe
;
20477 for (formati
= 0; formati
< format_count
; formati
++)
20479 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20480 format
+= bytes_read
;
20482 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20483 format
+= bytes_read
;
20485 gdb::optional
<const char *> string
;
20486 gdb::optional
<unsigned int> uint
;
20490 case DW_FORM_string
:
20491 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20495 case DW_FORM_line_strp
:
20496 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20503 case DW_FORM_data1
:
20504 uint
.emplace (read_1_byte (abfd
, buf
));
20508 case DW_FORM_data2
:
20509 uint
.emplace (read_2_bytes (abfd
, buf
));
20513 case DW_FORM_data4
:
20514 uint
.emplace (read_4_bytes (abfd
, buf
));
20518 case DW_FORM_data8
:
20519 uint
.emplace (read_8_bytes (abfd
, buf
));
20523 case DW_FORM_data16
:
20524 /* This is used for MD5, but file_entry does not record MD5s. */
20528 case DW_FORM_udata
:
20529 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20533 case DW_FORM_block
:
20534 /* It is valid only for DW_LNCT_timestamp which is ignored by
20539 switch (content_type
)
20542 if (string
.has_value ())
20545 case DW_LNCT_directory_index
:
20546 if (uint
.has_value ())
20547 fe
.d_index
= (dir_index
) *uint
;
20549 case DW_LNCT_timestamp
:
20550 if (uint
.has_value ())
20551 fe
.mod_time
= *uint
;
20554 if (uint
.has_value ())
20560 complaint (_("Unknown format content type %s"),
20561 pulongest (content_type
));
20565 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20571 /* Read the statement program header starting at OFFSET in
20572 .debug_line, or .debug_line.dwo. Return a pointer
20573 to a struct line_header, allocated using xmalloc.
20574 Returns NULL if there is a problem reading the header, e.g., if it
20575 has a version we don't understand.
20577 NOTE: the strings in the include directory and file name tables of
20578 the returned object point into the dwarf line section buffer,
20579 and must not be freed. */
20581 static line_header_up
20582 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20584 const gdb_byte
*line_ptr
;
20585 unsigned int bytes_read
, offset_size
;
20587 const char *cur_dir
, *cur_file
;
20588 struct dwarf2_section_info
*section
;
20590 struct dwarf2_per_objfile
*dwarf2_per_objfile
20591 = cu
->per_cu
->dwarf2_per_objfile
;
20593 section
= get_debug_line_section (cu
);
20594 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20595 if (section
->buffer
== NULL
)
20597 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20598 complaint (_("missing .debug_line.dwo section"));
20600 complaint (_("missing .debug_line section"));
20604 /* We can't do this until we know the section is non-empty.
20605 Only then do we know we have such a section. */
20606 abfd
= get_section_bfd_owner (section
);
20608 /* Make sure that at least there's room for the total_length field.
20609 That could be 12 bytes long, but we're just going to fudge that. */
20610 if (to_underlying (sect_off
) + 4 >= section
->size
)
20612 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20616 line_header_up
lh (new line_header ());
20618 lh
->sect_off
= sect_off
;
20619 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20621 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20623 /* Read in the header. */
20625 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20626 &bytes_read
, &offset_size
);
20627 line_ptr
+= bytes_read
;
20629 const gdb_byte
*start_here
= line_ptr
;
20631 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20633 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20636 lh
->statement_program_end
= start_here
+ lh
->total_length
;
20637 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20639 if (lh
->version
> 5)
20641 /* This is a version we don't understand. The format could have
20642 changed in ways we don't handle properly so just punt. */
20643 complaint (_("unsupported version in .debug_line section"));
20646 if (lh
->version
>= 5)
20648 gdb_byte segment_selector_size
;
20650 /* Skip address size. */
20651 read_1_byte (abfd
, line_ptr
);
20654 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20656 if (segment_selector_size
!= 0)
20658 complaint (_("unsupported segment selector size %u "
20659 "in .debug_line section"),
20660 segment_selector_size
);
20664 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20665 line_ptr
+= offset_size
;
20666 lh
->statement_program_start
= line_ptr
+ lh
->header_length
;
20667 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20669 if (lh
->version
>= 4)
20671 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20675 lh
->maximum_ops_per_instruction
= 1;
20677 if (lh
->maximum_ops_per_instruction
== 0)
20679 lh
->maximum_ops_per_instruction
= 1;
20680 complaint (_("invalid maximum_ops_per_instruction "
20681 "in `.debug_line' section"));
20684 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20686 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20688 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20690 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20692 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20694 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20695 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20697 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20701 if (lh
->version
>= 5)
20703 /* Read directory table. */
20704 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20706 [] (struct line_header
*header
, const char *name
,
20707 dir_index d_index
, unsigned int mod_time
,
20708 unsigned int length
)
20710 header
->add_include_dir (name
);
20713 /* Read file name table. */
20714 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20716 [] (struct line_header
*header
, const char *name
,
20717 dir_index d_index
, unsigned int mod_time
,
20718 unsigned int length
)
20720 header
->add_file_name (name
, d_index
, mod_time
, length
);
20725 /* Read directory table. */
20726 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20728 line_ptr
+= bytes_read
;
20729 lh
->add_include_dir (cur_dir
);
20731 line_ptr
+= bytes_read
;
20733 /* Read file name table. */
20734 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20736 unsigned int mod_time
, length
;
20739 line_ptr
+= bytes_read
;
20740 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20741 line_ptr
+= bytes_read
;
20742 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20743 line_ptr
+= bytes_read
;
20744 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20745 line_ptr
+= bytes_read
;
20747 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20749 line_ptr
+= bytes_read
;
20752 if (line_ptr
> (section
->buffer
+ section
->size
))
20753 complaint (_("line number info header doesn't "
20754 "fit in `.debug_line' section"));
20759 /* Subroutine of dwarf_decode_lines to simplify it.
20760 Return the file name of the psymtab for the given file_entry.
20761 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20762 If space for the result is malloc'd, *NAME_HOLDER will be set.
20763 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20765 static const char *
20766 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
20767 const struct partial_symtab
*pst
,
20768 const char *comp_dir
,
20769 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20771 const char *include_name
= fe
.name
;
20772 const char *include_name_to_compare
= include_name
;
20773 const char *pst_filename
;
20776 const char *dir_name
= fe
.include_dir (lh
);
20778 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20779 if (!IS_ABSOLUTE_PATH (include_name
)
20780 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20782 /* Avoid creating a duplicate psymtab for PST.
20783 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20784 Before we do the comparison, however, we need to account
20785 for DIR_NAME and COMP_DIR.
20786 First prepend dir_name (if non-NULL). If we still don't
20787 have an absolute path prepend comp_dir (if non-NULL).
20788 However, the directory we record in the include-file's
20789 psymtab does not contain COMP_DIR (to match the
20790 corresponding symtab(s)).
20795 bash$ gcc -g ./hello.c
20796 include_name = "hello.c"
20798 DW_AT_comp_dir = comp_dir = "/tmp"
20799 DW_AT_name = "./hello.c"
20803 if (dir_name
!= NULL
)
20805 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20806 include_name
, (char *) NULL
));
20807 include_name
= name_holder
->get ();
20808 include_name_to_compare
= include_name
;
20810 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20812 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20813 include_name
, (char *) NULL
));
20814 include_name_to_compare
= hold_compare
.get ();
20818 pst_filename
= pst
->filename
;
20819 gdb::unique_xmalloc_ptr
<char> copied_name
;
20820 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20822 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20823 pst_filename
, (char *) NULL
));
20824 pst_filename
= copied_name
.get ();
20827 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20831 return include_name
;
20834 /* State machine to track the state of the line number program. */
20836 class lnp_state_machine
20839 /* Initialize a machine state for the start of a line number
20841 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20842 bool record_lines_p
);
20844 file_entry
*current_file ()
20846 /* lh->file_names is 0-based, but the file name numbers in the
20847 statement program are 1-based. */
20848 return m_line_header
->file_name_at (m_file
);
20851 /* Record the line in the state machine. END_SEQUENCE is true if
20852 we're processing the end of a sequence. */
20853 void record_line (bool end_sequence
);
20855 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20856 nop-out rest of the lines in this sequence. */
20857 void check_line_address (struct dwarf2_cu
*cu
,
20858 const gdb_byte
*line_ptr
,
20859 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20861 void handle_set_discriminator (unsigned int discriminator
)
20863 m_discriminator
= discriminator
;
20864 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20867 /* Handle DW_LNE_set_address. */
20868 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20871 address
+= baseaddr
;
20872 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20875 /* Handle DW_LNS_advance_pc. */
20876 void handle_advance_pc (CORE_ADDR adjust
);
20878 /* Handle a special opcode. */
20879 void handle_special_opcode (unsigned char op_code
);
20881 /* Handle DW_LNS_advance_line. */
20882 void handle_advance_line (int line_delta
)
20884 advance_line (line_delta
);
20887 /* Handle DW_LNS_set_file. */
20888 void handle_set_file (file_name_index file
);
20890 /* Handle DW_LNS_negate_stmt. */
20891 void handle_negate_stmt ()
20893 m_is_stmt
= !m_is_stmt
;
20896 /* Handle DW_LNS_const_add_pc. */
20897 void handle_const_add_pc ();
20899 /* Handle DW_LNS_fixed_advance_pc. */
20900 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20902 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20906 /* Handle DW_LNS_copy. */
20907 void handle_copy ()
20909 record_line (false);
20910 m_discriminator
= 0;
20913 /* Handle DW_LNE_end_sequence. */
20914 void handle_end_sequence ()
20916 m_currently_recording_lines
= true;
20920 /* Advance the line by LINE_DELTA. */
20921 void advance_line (int line_delta
)
20923 m_line
+= line_delta
;
20925 if (line_delta
!= 0)
20926 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20929 struct dwarf2_cu
*m_cu
;
20931 gdbarch
*m_gdbarch
;
20933 /* True if we're recording lines.
20934 Otherwise we're building partial symtabs and are just interested in
20935 finding include files mentioned by the line number program. */
20936 bool m_record_lines_p
;
20938 /* The line number header. */
20939 line_header
*m_line_header
;
20941 /* These are part of the standard DWARF line number state machine,
20942 and initialized according to the DWARF spec. */
20944 unsigned char m_op_index
= 0;
20945 /* The line table index of the current file. */
20946 file_name_index m_file
= 1;
20947 unsigned int m_line
= 1;
20949 /* These are initialized in the constructor. */
20951 CORE_ADDR m_address
;
20953 unsigned int m_discriminator
;
20955 /* Additional bits of state we need to track. */
20957 /* The last file that we called dwarf2_start_subfile for.
20958 This is only used for TLLs. */
20959 unsigned int m_last_file
= 0;
20960 /* The last file a line number was recorded for. */
20961 struct subfile
*m_last_subfile
= NULL
;
20963 /* When true, record the lines we decode. */
20964 bool m_currently_recording_lines
= false;
20966 /* The last line number that was recorded, used to coalesce
20967 consecutive entries for the same line. This can happen, for
20968 example, when discriminators are present. PR 17276. */
20969 unsigned int m_last_line
= 0;
20970 bool m_line_has_non_zero_discriminator
= false;
20974 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20976 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20977 / m_line_header
->maximum_ops_per_instruction
)
20978 * m_line_header
->minimum_instruction_length
);
20979 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20980 m_op_index
= ((m_op_index
+ adjust
)
20981 % m_line_header
->maximum_ops_per_instruction
);
20985 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20987 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20988 CORE_ADDR addr_adj
= (((m_op_index
20989 + (adj_opcode
/ m_line_header
->line_range
))
20990 / m_line_header
->maximum_ops_per_instruction
)
20991 * m_line_header
->minimum_instruction_length
);
20992 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20993 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20994 % m_line_header
->maximum_ops_per_instruction
);
20996 int line_delta
= (m_line_header
->line_base
20997 + (adj_opcode
% m_line_header
->line_range
));
20998 advance_line (line_delta
);
20999 record_line (false);
21000 m_discriminator
= 0;
21004 lnp_state_machine::handle_set_file (file_name_index file
)
21008 const file_entry
*fe
= current_file ();
21010 dwarf2_debug_line_missing_file_complaint ();
21011 else if (m_record_lines_p
)
21013 const char *dir
= fe
->include_dir (m_line_header
);
21015 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21016 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
21017 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
21022 lnp_state_machine::handle_const_add_pc ()
21025 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
21028 = (((m_op_index
+ adjust
)
21029 / m_line_header
->maximum_ops_per_instruction
)
21030 * m_line_header
->minimum_instruction_length
);
21032 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21033 m_op_index
= ((m_op_index
+ adjust
)
21034 % m_line_header
->maximum_ops_per_instruction
);
21037 /* Return non-zero if we should add LINE to the line number table.
21038 LINE is the line to add, LAST_LINE is the last line that was added,
21039 LAST_SUBFILE is the subfile for LAST_LINE.
21040 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
21041 had a non-zero discriminator.
21043 We have to be careful in the presence of discriminators.
21044 E.g., for this line:
21046 for (i = 0; i < 100000; i++);
21048 clang can emit four line number entries for that one line,
21049 each with a different discriminator.
21050 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
21052 However, we want gdb to coalesce all four entries into one.
21053 Otherwise the user could stepi into the middle of the line and
21054 gdb would get confused about whether the pc really was in the
21055 middle of the line.
21057 Things are further complicated by the fact that two consecutive
21058 line number entries for the same line is a heuristic used by gcc
21059 to denote the end of the prologue. So we can't just discard duplicate
21060 entries, we have to be selective about it. The heuristic we use is
21061 that we only collapse consecutive entries for the same line if at least
21062 one of those entries has a non-zero discriminator. PR 17276.
21064 Note: Addresses in the line number state machine can never go backwards
21065 within one sequence, thus this coalescing is ok. */
21068 dwarf_record_line_p (struct dwarf2_cu
*cu
,
21069 unsigned int line
, unsigned int last_line
,
21070 int line_has_non_zero_discriminator
,
21071 struct subfile
*last_subfile
)
21073 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
21075 if (line
!= last_line
)
21077 /* Same line for the same file that we've seen already.
21078 As a last check, for pr 17276, only record the line if the line
21079 has never had a non-zero discriminator. */
21080 if (!line_has_non_zero_discriminator
)
21085 /* Use the CU's builder to record line number LINE beginning at
21086 address ADDRESS in the line table of subfile SUBFILE. */
21089 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21090 unsigned int line
, CORE_ADDR address
,
21091 struct dwarf2_cu
*cu
)
21093 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
21095 if (dwarf_line_debug
)
21097 fprintf_unfiltered (gdb_stdlog
,
21098 "Recording line %u, file %s, address %s\n",
21099 line
, lbasename (subfile
->name
),
21100 paddress (gdbarch
, address
));
21104 cu
->get_builder ()->record_line (subfile
, line
, addr
);
21107 /* Subroutine of dwarf_decode_lines_1 to simplify it.
21108 Mark the end of a set of line number records.
21109 The arguments are the same as for dwarf_record_line_1.
21110 If SUBFILE is NULL the request is ignored. */
21113 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21114 CORE_ADDR address
, struct dwarf2_cu
*cu
)
21116 if (subfile
== NULL
)
21119 if (dwarf_line_debug
)
21121 fprintf_unfiltered (gdb_stdlog
,
21122 "Finishing current line, file %s, address %s\n",
21123 lbasename (subfile
->name
),
21124 paddress (gdbarch
, address
));
21127 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
21131 lnp_state_machine::record_line (bool end_sequence
)
21133 if (dwarf_line_debug
)
21135 fprintf_unfiltered (gdb_stdlog
,
21136 "Processing actual line %u: file %u,"
21137 " address %s, is_stmt %u, discrim %u\n",
21139 paddress (m_gdbarch
, m_address
),
21140 m_is_stmt
, m_discriminator
);
21143 file_entry
*fe
= current_file ();
21146 dwarf2_debug_line_missing_file_complaint ();
21147 /* For now we ignore lines not starting on an instruction boundary.
21148 But not when processing end_sequence for compatibility with the
21149 previous version of the code. */
21150 else if (m_op_index
== 0 || end_sequence
)
21152 fe
->included_p
= 1;
21153 if (m_record_lines_p
&& (producer_is_codewarrior (m_cu
) || m_is_stmt
))
21155 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
21158 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
21159 m_currently_recording_lines
? m_cu
: nullptr);
21164 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
21165 m_line_has_non_zero_discriminator
,
21168 buildsym_compunit
*builder
= m_cu
->get_builder ();
21169 dwarf_record_line_1 (m_gdbarch
,
21170 builder
->get_current_subfile (),
21172 m_currently_recording_lines
? m_cu
: nullptr);
21174 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21175 m_last_line
= m_line
;
21181 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
21182 line_header
*lh
, bool record_lines_p
)
21186 m_record_lines_p
= record_lines_p
;
21187 m_line_header
= lh
;
21189 m_currently_recording_lines
= true;
21191 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
21192 was a line entry for it so that the backend has a chance to adjust it
21193 and also record it in case it needs it. This is currently used by MIPS
21194 code, cf. `mips_adjust_dwarf2_line'. */
21195 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
21196 m_is_stmt
= lh
->default_is_stmt
;
21197 m_discriminator
= 0;
21201 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
21202 const gdb_byte
*line_ptr
,
21203 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
21205 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
21206 the pc range of the CU. However, we restrict the test to only ADDRESS
21207 values of zero to preserve GDB's previous behaviour which is to handle
21208 the specific case of a function being GC'd by the linker. */
21210 if (address
== 0 && address
< unrelocated_lowpc
)
21212 /* This line table is for a function which has been
21213 GCd by the linker. Ignore it. PR gdb/12528 */
21215 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21216 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
21218 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
21219 line_offset
, objfile_name (objfile
));
21220 m_currently_recording_lines
= false;
21221 /* Note: m_currently_recording_lines is left as false until we see
21222 DW_LNE_end_sequence. */
21226 /* Subroutine of dwarf_decode_lines to simplify it.
21227 Process the line number information in LH.
21228 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21229 program in order to set included_p for every referenced header. */
21232 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21233 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21235 const gdb_byte
*line_ptr
, *extended_end
;
21236 const gdb_byte
*line_end
;
21237 unsigned int bytes_read
, extended_len
;
21238 unsigned char op_code
, extended_op
;
21239 CORE_ADDR baseaddr
;
21240 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21241 bfd
*abfd
= objfile
->obfd
;
21242 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21243 /* True if we're recording line info (as opposed to building partial
21244 symtabs and just interested in finding include files mentioned by
21245 the line number program). */
21246 bool record_lines_p
= !decode_for_pst_p
;
21248 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21250 line_ptr
= lh
->statement_program_start
;
21251 line_end
= lh
->statement_program_end
;
21253 /* Read the statement sequences until there's nothing left. */
21254 while (line_ptr
< line_end
)
21256 /* The DWARF line number program state machine. Reset the state
21257 machine at the start of each sequence. */
21258 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21259 bool end_sequence
= false;
21261 if (record_lines_p
)
21263 /* Start a subfile for the current file of the state
21265 const file_entry
*fe
= state_machine
.current_file ();
21268 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21271 /* Decode the table. */
21272 while (line_ptr
< line_end
&& !end_sequence
)
21274 op_code
= read_1_byte (abfd
, line_ptr
);
21277 if (op_code
>= lh
->opcode_base
)
21279 /* Special opcode. */
21280 state_machine
.handle_special_opcode (op_code
);
21282 else switch (op_code
)
21284 case DW_LNS_extended_op
:
21285 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21287 line_ptr
+= bytes_read
;
21288 extended_end
= line_ptr
+ extended_len
;
21289 extended_op
= read_1_byte (abfd
, line_ptr
);
21291 switch (extended_op
)
21293 case DW_LNE_end_sequence
:
21294 state_machine
.handle_end_sequence ();
21295 end_sequence
= true;
21297 case DW_LNE_set_address
:
21300 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
21301 line_ptr
+= bytes_read
;
21303 state_machine
.check_line_address (cu
, line_ptr
,
21304 lowpc
- baseaddr
, address
);
21305 state_machine
.handle_set_address (baseaddr
, address
);
21308 case DW_LNE_define_file
:
21310 const char *cur_file
;
21311 unsigned int mod_time
, length
;
21314 cur_file
= read_direct_string (abfd
, line_ptr
,
21316 line_ptr
+= bytes_read
;
21317 dindex
= (dir_index
)
21318 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21319 line_ptr
+= bytes_read
;
21321 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21322 line_ptr
+= bytes_read
;
21324 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21325 line_ptr
+= bytes_read
;
21326 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21329 case DW_LNE_set_discriminator
:
21331 /* The discriminator is not interesting to the
21332 debugger; just ignore it. We still need to
21333 check its value though:
21334 if there are consecutive entries for the same
21335 (non-prologue) line we want to coalesce them.
21338 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21339 line_ptr
+= bytes_read
;
21341 state_machine
.handle_set_discriminator (discr
);
21345 complaint (_("mangled .debug_line section"));
21348 /* Make sure that we parsed the extended op correctly. If e.g.
21349 we expected a different address size than the producer used,
21350 we may have read the wrong number of bytes. */
21351 if (line_ptr
!= extended_end
)
21353 complaint (_("mangled .debug_line section"));
21358 state_machine
.handle_copy ();
21360 case DW_LNS_advance_pc
:
21363 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21364 line_ptr
+= bytes_read
;
21366 state_machine
.handle_advance_pc (adjust
);
21369 case DW_LNS_advance_line
:
21372 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21373 line_ptr
+= bytes_read
;
21375 state_machine
.handle_advance_line (line_delta
);
21378 case DW_LNS_set_file
:
21380 file_name_index file
21381 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21383 line_ptr
+= bytes_read
;
21385 state_machine
.handle_set_file (file
);
21388 case DW_LNS_set_column
:
21389 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21390 line_ptr
+= bytes_read
;
21392 case DW_LNS_negate_stmt
:
21393 state_machine
.handle_negate_stmt ();
21395 case DW_LNS_set_basic_block
:
21397 /* Add to the address register of the state machine the
21398 address increment value corresponding to special opcode
21399 255. I.e., this value is scaled by the minimum
21400 instruction length since special opcode 255 would have
21401 scaled the increment. */
21402 case DW_LNS_const_add_pc
:
21403 state_machine
.handle_const_add_pc ();
21405 case DW_LNS_fixed_advance_pc
:
21407 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21410 state_machine
.handle_fixed_advance_pc (addr_adj
);
21415 /* Unknown standard opcode, ignore it. */
21418 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21420 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21421 line_ptr
+= bytes_read
;
21428 dwarf2_debug_line_missing_end_sequence_complaint ();
21430 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21431 in which case we still finish recording the last line). */
21432 state_machine
.record_line (true);
21436 /* Decode the Line Number Program (LNP) for the given line_header
21437 structure and CU. The actual information extracted and the type
21438 of structures created from the LNP depends on the value of PST.
21440 1. If PST is NULL, then this procedure uses the data from the program
21441 to create all necessary symbol tables, and their linetables.
21443 2. If PST is not NULL, this procedure reads the program to determine
21444 the list of files included by the unit represented by PST, and
21445 builds all the associated partial symbol tables.
21447 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21448 It is used for relative paths in the line table.
21449 NOTE: When processing partial symtabs (pst != NULL),
21450 comp_dir == pst->dirname.
21452 NOTE: It is important that psymtabs have the same file name (via strcmp)
21453 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21454 symtab we don't use it in the name of the psymtabs we create.
21455 E.g. expand_line_sal requires this when finding psymtabs to expand.
21456 A good testcase for this is mb-inline.exp.
21458 LOWPC is the lowest address in CU (or 0 if not known).
21460 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21461 for its PC<->lines mapping information. Otherwise only the filename
21462 table is read in. */
21465 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21466 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21467 CORE_ADDR lowpc
, int decode_mapping
)
21469 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21470 const int decode_for_pst_p
= (pst
!= NULL
);
21472 if (decode_mapping
)
21473 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21475 if (decode_for_pst_p
)
21477 /* Now that we're done scanning the Line Header Program, we can
21478 create the psymtab of each included file. */
21479 for (auto &file_entry
: lh
->file_names ())
21480 if (file_entry
.included_p
== 1)
21482 gdb::unique_xmalloc_ptr
<char> name_holder
;
21483 const char *include_name
=
21484 psymtab_include_file_name (lh
, file_entry
, pst
,
21485 comp_dir
, &name_holder
);
21486 if (include_name
!= NULL
)
21487 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21492 /* Make sure a symtab is created for every file, even files
21493 which contain only variables (i.e. no code with associated
21495 buildsym_compunit
*builder
= cu
->get_builder ();
21496 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21498 for (auto &fe
: lh
->file_names ())
21500 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21501 if (builder
->get_current_subfile ()->symtab
== NULL
)
21503 builder
->get_current_subfile ()->symtab
21504 = allocate_symtab (cust
,
21505 builder
->get_current_subfile ()->name
);
21507 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21512 /* Start a subfile for DWARF. FILENAME is the name of the file and
21513 DIRNAME the name of the source directory which contains FILENAME
21514 or NULL if not known.
21515 This routine tries to keep line numbers from identical absolute and
21516 relative file names in a common subfile.
21518 Using the `list' example from the GDB testsuite, which resides in
21519 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21520 of /srcdir/list0.c yields the following debugging information for list0.c:
21522 DW_AT_name: /srcdir/list0.c
21523 DW_AT_comp_dir: /compdir
21524 files.files[0].name: list0.h
21525 files.files[0].dir: /srcdir
21526 files.files[1].name: list0.c
21527 files.files[1].dir: /srcdir
21529 The line number information for list0.c has to end up in a single
21530 subfile, so that `break /srcdir/list0.c:1' works as expected.
21531 start_subfile will ensure that this happens provided that we pass the
21532 concatenation of files.files[1].dir and files.files[1].name as the
21536 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21537 const char *dirname
)
21541 /* In order not to lose the line information directory,
21542 we concatenate it to the filename when it makes sense.
21543 Note that the Dwarf3 standard says (speaking of filenames in line
21544 information): ``The directory index is ignored for file names
21545 that represent full path names''. Thus ignoring dirname in the
21546 `else' branch below isn't an issue. */
21548 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21550 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21554 cu
->get_builder ()->start_subfile (filename
);
21560 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21561 buildsym_compunit constructor. */
21563 struct compunit_symtab
*
21564 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21567 gdb_assert (m_builder
== nullptr);
21569 m_builder
.reset (new struct buildsym_compunit
21570 (per_cu
->dwarf2_per_objfile
->objfile
,
21571 name
, comp_dir
, language
, low_pc
));
21573 list_in_scope
= get_builder ()->get_file_symbols ();
21575 get_builder ()->record_debugformat ("DWARF 2");
21576 get_builder ()->record_producer (producer
);
21578 processing_has_namespace_info
= false;
21580 return get_builder ()->get_compunit_symtab ();
21584 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21585 struct dwarf2_cu
*cu
)
21587 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21588 struct comp_unit_head
*cu_header
= &cu
->header
;
21590 /* NOTE drow/2003-01-30: There used to be a comment and some special
21591 code here to turn a symbol with DW_AT_external and a
21592 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21593 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21594 with some versions of binutils) where shared libraries could have
21595 relocations against symbols in their debug information - the
21596 minimal symbol would have the right address, but the debug info
21597 would not. It's no longer necessary, because we will explicitly
21598 apply relocations when we read in the debug information now. */
21600 /* A DW_AT_location attribute with no contents indicates that a
21601 variable has been optimized away. */
21602 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21604 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21608 /* Handle one degenerate form of location expression specially, to
21609 preserve GDB's previous behavior when section offsets are
21610 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21611 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21613 if (attr_form_is_block (attr
)
21614 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21615 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21616 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21617 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21618 && (DW_BLOCK (attr
)->size
21619 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21621 unsigned int dummy
;
21623 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21624 SET_SYMBOL_VALUE_ADDRESS (sym
,
21625 read_address (objfile
->obfd
,
21626 DW_BLOCK (attr
)->data
+ 1,
21629 SET_SYMBOL_VALUE_ADDRESS
21630 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
21632 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21633 fixup_symbol_section (sym
, objfile
);
21634 SET_SYMBOL_VALUE_ADDRESS (sym
,
21635 SYMBOL_VALUE_ADDRESS (sym
)
21636 + ANOFFSET (objfile
->section_offsets
,
21637 SYMBOL_SECTION (sym
)));
21641 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21642 expression evaluator, and use LOC_COMPUTED only when necessary
21643 (i.e. when the value of a register or memory location is
21644 referenced, or a thread-local block, etc.). Then again, it might
21645 not be worthwhile. I'm assuming that it isn't unless performance
21646 or memory numbers show me otherwise. */
21648 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21650 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21651 cu
->has_loclist
= true;
21654 /* Given a pointer to a DWARF information entry, figure out if we need
21655 to make a symbol table entry for it, and if so, create a new entry
21656 and return a pointer to it.
21657 If TYPE is NULL, determine symbol type from the die, otherwise
21658 used the passed type.
21659 If SPACE is not NULL, use it to hold the new symbol. If it is
21660 NULL, allocate a new symbol on the objfile's obstack. */
21662 static struct symbol
*
21663 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21664 struct symbol
*space
)
21666 struct dwarf2_per_objfile
*dwarf2_per_objfile
21667 = cu
->per_cu
->dwarf2_per_objfile
;
21668 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21669 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21670 struct symbol
*sym
= NULL
;
21672 struct attribute
*attr
= NULL
;
21673 struct attribute
*attr2
= NULL
;
21674 CORE_ADDR baseaddr
;
21675 struct pending
**list_to_add
= NULL
;
21677 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21679 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21681 name
= dwarf2_name (die
, cu
);
21684 const char *linkagename
;
21685 int suppress_add
= 0;
21690 sym
= allocate_symbol (objfile
);
21691 OBJSTAT (objfile
, n_syms
++);
21693 /* Cache this symbol's name and the name's demangled form (if any). */
21694 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21695 linkagename
= dwarf2_physname (name
, die
, cu
);
21696 SYMBOL_SET_NAMES (sym
, linkagename
, false, objfile
);
21698 /* Fortran does not have mangling standard and the mangling does differ
21699 between gfortran, iFort etc. */
21700 if (cu
->language
== language_fortran
21701 && symbol_get_demangled_name (sym
) == NULL
)
21702 symbol_set_demangled_name (sym
,
21703 dwarf2_full_name (name
, die
, cu
),
21706 /* Default assumptions.
21707 Use the passed type or decode it from the die. */
21708 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21709 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21711 SYMBOL_TYPE (sym
) = type
;
21713 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21714 attr
= dwarf2_attr (die
,
21715 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21717 if (attr
!= nullptr)
21719 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21722 attr
= dwarf2_attr (die
,
21723 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21725 if (attr
!= nullptr)
21727 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21728 struct file_entry
*fe
;
21730 if (cu
->line_header
!= NULL
)
21731 fe
= cu
->line_header
->file_name_at (file_index
);
21736 complaint (_("file index out of range"));
21738 symbol_set_symtab (sym
, fe
->symtab
);
21744 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21745 if (attr
!= nullptr)
21749 addr
= attr_value_as_address (attr
);
21750 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21751 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
21753 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21754 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21755 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21756 add_symbol_to_list (sym
, cu
->list_in_scope
);
21758 case DW_TAG_subprogram
:
21759 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21761 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21762 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21763 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21764 || cu
->language
== language_ada
21765 || cu
->language
== language_fortran
)
21767 /* Subprograms marked external are stored as a global symbol.
21768 Ada and Fortran subprograms, whether marked external or
21769 not, are always stored as a global symbol, because we want
21770 to be able to access them globally. For instance, we want
21771 to be able to break on a nested subprogram without having
21772 to specify the context. */
21773 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21777 list_to_add
= cu
->list_in_scope
;
21780 case DW_TAG_inlined_subroutine
:
21781 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21783 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21784 SYMBOL_INLINED (sym
) = 1;
21785 list_to_add
= cu
->list_in_scope
;
21787 case DW_TAG_template_value_param
:
21789 /* Fall through. */
21790 case DW_TAG_constant
:
21791 case DW_TAG_variable
:
21792 case DW_TAG_member
:
21793 /* Compilation with minimal debug info may result in
21794 variables with missing type entries. Change the
21795 misleading `void' type to something sensible. */
21796 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21797 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21799 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21800 /* In the case of DW_TAG_member, we should only be called for
21801 static const members. */
21802 if (die
->tag
== DW_TAG_member
)
21804 /* dwarf2_add_field uses die_is_declaration,
21805 so we do the same. */
21806 gdb_assert (die_is_declaration (die
, cu
));
21809 if (attr
!= nullptr)
21811 dwarf2_const_value (attr
, sym
, cu
);
21812 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21815 if (attr2
&& (DW_UNSND (attr2
) != 0))
21816 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21818 list_to_add
= cu
->list_in_scope
;
21822 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21823 if (attr
!= nullptr)
21825 var_decode_location (attr
, sym
, cu
);
21826 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21828 /* Fortran explicitly imports any global symbols to the local
21829 scope by DW_TAG_common_block. */
21830 if (cu
->language
== language_fortran
&& die
->parent
21831 && die
->parent
->tag
== DW_TAG_common_block
)
21834 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21835 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21836 && !dwarf2_per_objfile
->has_section_at_zero
)
21838 /* When a static variable is eliminated by the linker,
21839 the corresponding debug information is not stripped
21840 out, but the variable address is set to null;
21841 do not add such variables into symbol table. */
21843 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21845 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21846 && (objfile
->flags
& OBJF_MAINLINE
) == 0
21847 && dwarf2_per_objfile
->can_copy
)
21849 /* A global static variable might be subject to
21850 copy relocation. We first check for a local
21851 minsym, though, because maybe the symbol was
21852 marked hidden, in which case this would not
21854 bound_minimal_symbol found
21855 = (lookup_minimal_symbol_linkage
21856 (sym
->linkage_name (), objfile
));
21857 if (found
.minsym
!= nullptr)
21858 sym
->maybe_copied
= 1;
21861 /* A variable with DW_AT_external is never static,
21862 but it may be block-scoped. */
21864 = ((cu
->list_in_scope
21865 == cu
->get_builder ()->get_file_symbols ())
21866 ? cu
->get_builder ()->get_global_symbols ()
21867 : cu
->list_in_scope
);
21870 list_to_add
= cu
->list_in_scope
;
21874 /* We do not know the address of this symbol.
21875 If it is an external symbol and we have type information
21876 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21877 The address of the variable will then be determined from
21878 the minimal symbol table whenever the variable is
21880 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21882 /* Fortran explicitly imports any global symbols to the local
21883 scope by DW_TAG_common_block. */
21884 if (cu
->language
== language_fortran
&& die
->parent
21885 && die
->parent
->tag
== DW_TAG_common_block
)
21887 /* SYMBOL_CLASS doesn't matter here because
21888 read_common_block is going to reset it. */
21890 list_to_add
= cu
->list_in_scope
;
21892 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21893 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21895 /* A variable with DW_AT_external is never static, but it
21896 may be block-scoped. */
21898 = ((cu
->list_in_scope
21899 == cu
->get_builder ()->get_file_symbols ())
21900 ? cu
->get_builder ()->get_global_symbols ()
21901 : cu
->list_in_scope
);
21903 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21905 else if (!die_is_declaration (die
, cu
))
21907 /* Use the default LOC_OPTIMIZED_OUT class. */
21908 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21910 list_to_add
= cu
->list_in_scope
;
21914 case DW_TAG_formal_parameter
:
21916 /* If we are inside a function, mark this as an argument. If
21917 not, we might be looking at an argument to an inlined function
21918 when we do not have enough information to show inlined frames;
21919 pretend it's a local variable in that case so that the user can
21921 struct context_stack
*curr
21922 = cu
->get_builder ()->get_current_context_stack ();
21923 if (curr
!= nullptr && curr
->name
!= nullptr)
21924 SYMBOL_IS_ARGUMENT (sym
) = 1;
21925 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21926 if (attr
!= nullptr)
21928 var_decode_location (attr
, sym
, cu
);
21930 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21931 if (attr
!= nullptr)
21933 dwarf2_const_value (attr
, sym
, cu
);
21936 list_to_add
= cu
->list_in_scope
;
21939 case DW_TAG_unspecified_parameters
:
21940 /* From varargs functions; gdb doesn't seem to have any
21941 interest in this information, so just ignore it for now.
21944 case DW_TAG_template_type_param
:
21946 /* Fall through. */
21947 case DW_TAG_class_type
:
21948 case DW_TAG_interface_type
:
21949 case DW_TAG_structure_type
:
21950 case DW_TAG_union_type
:
21951 case DW_TAG_set_type
:
21952 case DW_TAG_enumeration_type
:
21953 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21954 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21957 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21958 really ever be static objects: otherwise, if you try
21959 to, say, break of a class's method and you're in a file
21960 which doesn't mention that class, it won't work unless
21961 the check for all static symbols in lookup_symbol_aux
21962 saves you. See the OtherFileClass tests in
21963 gdb.c++/namespace.exp. */
21967 buildsym_compunit
*builder
= cu
->get_builder ();
21969 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21970 && cu
->language
== language_cplus
21971 ? builder
->get_global_symbols ()
21972 : cu
->list_in_scope
);
21974 /* The semantics of C++ state that "struct foo {
21975 ... }" also defines a typedef for "foo". */
21976 if (cu
->language
== language_cplus
21977 || cu
->language
== language_ada
21978 || cu
->language
== language_d
21979 || cu
->language
== language_rust
)
21981 /* The symbol's name is already allocated along
21982 with this objfile, so we don't need to
21983 duplicate it for the type. */
21984 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21985 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
21990 case DW_TAG_typedef
:
21991 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21992 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21993 list_to_add
= cu
->list_in_scope
;
21995 case DW_TAG_base_type
:
21996 case DW_TAG_subrange_type
:
21997 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21998 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21999 list_to_add
= cu
->list_in_scope
;
22001 case DW_TAG_enumerator
:
22002 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22003 if (attr
!= nullptr)
22005 dwarf2_const_value (attr
, sym
, cu
);
22008 /* NOTE: carlton/2003-11-10: See comment above in the
22009 DW_TAG_class_type, etc. block. */
22012 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
22013 && cu
->language
== language_cplus
22014 ? cu
->get_builder ()->get_global_symbols ()
22015 : cu
->list_in_scope
);
22018 case DW_TAG_imported_declaration
:
22019 case DW_TAG_namespace
:
22020 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22021 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22023 case DW_TAG_module
:
22024 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22025 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
22026 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22028 case DW_TAG_common_block
:
22029 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
22030 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
22031 add_symbol_to_list (sym
, cu
->list_in_scope
);
22034 /* Not a tag we recognize. Hopefully we aren't processing
22035 trash data, but since we must specifically ignore things
22036 we don't recognize, there is nothing else we should do at
22038 complaint (_("unsupported tag: '%s'"),
22039 dwarf_tag_name (die
->tag
));
22045 sym
->hash_next
= objfile
->template_symbols
;
22046 objfile
->template_symbols
= sym
;
22047 list_to_add
= NULL
;
22050 if (list_to_add
!= NULL
)
22051 add_symbol_to_list (sym
, list_to_add
);
22053 /* For the benefit of old versions of GCC, check for anonymous
22054 namespaces based on the demangled name. */
22055 if (!cu
->processing_has_namespace_info
22056 && cu
->language
== language_cplus
)
22057 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
22062 /* Given an attr with a DW_FORM_dataN value in host byte order,
22063 zero-extend it as appropriate for the symbol's type. The DWARF
22064 standard (v4) is not entirely clear about the meaning of using
22065 DW_FORM_dataN for a constant with a signed type, where the type is
22066 wider than the data. The conclusion of a discussion on the DWARF
22067 list was that this is unspecified. We choose to always zero-extend
22068 because that is the interpretation long in use by GCC. */
22071 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
22072 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
22074 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22075 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
22076 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
22077 LONGEST l
= DW_UNSND (attr
);
22079 if (bits
< sizeof (*value
) * 8)
22081 l
&= ((LONGEST
) 1 << bits
) - 1;
22084 else if (bits
== sizeof (*value
) * 8)
22088 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
22089 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
22096 /* Read a constant value from an attribute. Either set *VALUE, or if
22097 the value does not fit in *VALUE, set *BYTES - either already
22098 allocated on the objfile obstack, or newly allocated on OBSTACK,
22099 or, set *BATON, if we translated the constant to a location
22103 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
22104 const char *name
, struct obstack
*obstack
,
22105 struct dwarf2_cu
*cu
,
22106 LONGEST
*value
, const gdb_byte
**bytes
,
22107 struct dwarf2_locexpr_baton
**baton
)
22109 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22110 struct comp_unit_head
*cu_header
= &cu
->header
;
22111 struct dwarf_block
*blk
;
22112 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
22113 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22119 switch (attr
->form
)
22122 case DW_FORM_addrx
:
22123 case DW_FORM_GNU_addr_index
:
22127 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
22128 dwarf2_const_value_length_mismatch_complaint (name
,
22129 cu_header
->addr_size
,
22130 TYPE_LENGTH (type
));
22131 /* Symbols of this form are reasonably rare, so we just
22132 piggyback on the existing location code rather than writing
22133 a new implementation of symbol_computed_ops. */
22134 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
22135 (*baton
)->per_cu
= cu
->per_cu
;
22136 gdb_assert ((*baton
)->per_cu
);
22138 (*baton
)->size
= 2 + cu_header
->addr_size
;
22139 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
22140 (*baton
)->data
= data
;
22142 data
[0] = DW_OP_addr
;
22143 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
22144 byte_order
, DW_ADDR (attr
));
22145 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
22148 case DW_FORM_string
:
22151 case DW_FORM_GNU_str_index
:
22152 case DW_FORM_GNU_strp_alt
:
22153 /* DW_STRING is already allocated on the objfile obstack, point
22155 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
22157 case DW_FORM_block1
:
22158 case DW_FORM_block2
:
22159 case DW_FORM_block4
:
22160 case DW_FORM_block
:
22161 case DW_FORM_exprloc
:
22162 case DW_FORM_data16
:
22163 blk
= DW_BLOCK (attr
);
22164 if (TYPE_LENGTH (type
) != blk
->size
)
22165 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
22166 TYPE_LENGTH (type
));
22167 *bytes
= blk
->data
;
22170 /* The DW_AT_const_value attributes are supposed to carry the
22171 symbol's value "represented as it would be on the target
22172 architecture." By the time we get here, it's already been
22173 converted to host endianness, so we just need to sign- or
22174 zero-extend it as appropriate. */
22175 case DW_FORM_data1
:
22176 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
22178 case DW_FORM_data2
:
22179 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
22181 case DW_FORM_data4
:
22182 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
22184 case DW_FORM_data8
:
22185 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
22188 case DW_FORM_sdata
:
22189 case DW_FORM_implicit_const
:
22190 *value
= DW_SND (attr
);
22193 case DW_FORM_udata
:
22194 *value
= DW_UNSND (attr
);
22198 complaint (_("unsupported const value attribute form: '%s'"),
22199 dwarf_form_name (attr
->form
));
22206 /* Copy constant value from an attribute to a symbol. */
22209 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
22210 struct dwarf2_cu
*cu
)
22212 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22214 const gdb_byte
*bytes
;
22215 struct dwarf2_locexpr_baton
*baton
;
22217 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
22218 sym
->print_name (),
22219 &objfile
->objfile_obstack
, cu
,
22220 &value
, &bytes
, &baton
);
22224 SYMBOL_LOCATION_BATON (sym
) = baton
;
22225 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
22227 else if (bytes
!= NULL
)
22229 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22230 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22234 SYMBOL_VALUE (sym
) = value
;
22235 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22239 /* Return the type of the die in question using its DW_AT_type attribute. */
22241 static struct type
*
22242 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22244 struct attribute
*type_attr
;
22246 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22249 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22250 /* A missing DW_AT_type represents a void type. */
22251 return objfile_type (objfile
)->builtin_void
;
22254 return lookup_die_type (die
, type_attr
, cu
);
22257 /* True iff CU's producer generates GNAT Ada auxiliary information
22258 that allows to find parallel types through that information instead
22259 of having to do expensive parallel lookups by type name. */
22262 need_gnat_info (struct dwarf2_cu
*cu
)
22264 /* Assume that the Ada compiler was GNAT, which always produces
22265 the auxiliary information. */
22266 return (cu
->language
== language_ada
);
22269 /* Return the auxiliary type of the die in question using its
22270 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22271 attribute is not present. */
22273 static struct type
*
22274 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22276 struct attribute
*type_attr
;
22278 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22282 return lookup_die_type (die
, type_attr
, cu
);
22285 /* If DIE has a descriptive_type attribute, then set the TYPE's
22286 descriptive type accordingly. */
22289 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22290 struct dwarf2_cu
*cu
)
22292 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22294 if (descriptive_type
)
22296 ALLOCATE_GNAT_AUX_TYPE (type
);
22297 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22301 /* Return the containing type of the die in question using its
22302 DW_AT_containing_type attribute. */
22304 static struct type
*
22305 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22307 struct attribute
*type_attr
;
22308 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22310 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22312 error (_("Dwarf Error: Problem turning containing type into gdb type "
22313 "[in module %s]"), objfile_name (objfile
));
22315 return lookup_die_type (die
, type_attr
, cu
);
22318 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22320 static struct type
*
22321 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22323 struct dwarf2_per_objfile
*dwarf2_per_objfile
22324 = cu
->per_cu
->dwarf2_per_objfile
;
22325 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22328 std::string message
22329 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22330 objfile_name (objfile
),
22331 sect_offset_str (cu
->header
.sect_off
),
22332 sect_offset_str (die
->sect_off
));
22333 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
22335 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22338 /* Look up the type of DIE in CU using its type attribute ATTR.
22339 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22340 DW_AT_containing_type.
22341 If there is no type substitute an error marker. */
22343 static struct type
*
22344 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22345 struct dwarf2_cu
*cu
)
22347 struct dwarf2_per_objfile
*dwarf2_per_objfile
22348 = cu
->per_cu
->dwarf2_per_objfile
;
22349 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22350 struct type
*this_type
;
22352 gdb_assert (attr
->name
== DW_AT_type
22353 || attr
->name
== DW_AT_GNAT_descriptive_type
22354 || attr
->name
== DW_AT_containing_type
);
22356 /* First see if we have it cached. */
22358 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22360 struct dwarf2_per_cu_data
*per_cu
;
22361 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22363 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
22364 dwarf2_per_objfile
);
22365 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
22367 else if (attr_form_is_ref (attr
))
22369 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22371 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
22373 else if (attr
->form
== DW_FORM_ref_sig8
)
22375 ULONGEST signature
= DW_SIGNATURE (attr
);
22377 return get_signatured_type (die
, signature
, cu
);
22381 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22382 " at %s [in module %s]"),
22383 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22384 objfile_name (objfile
));
22385 return build_error_marker_type (cu
, die
);
22388 /* If not cached we need to read it in. */
22390 if (this_type
== NULL
)
22392 struct die_info
*type_die
= NULL
;
22393 struct dwarf2_cu
*type_cu
= cu
;
22395 if (attr_form_is_ref (attr
))
22396 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22397 if (type_die
== NULL
)
22398 return build_error_marker_type (cu
, die
);
22399 /* If we find the type now, it's probably because the type came
22400 from an inter-CU reference and the type's CU got expanded before
22402 this_type
= read_type_die (type_die
, type_cu
);
22405 /* If we still don't have a type use an error marker. */
22407 if (this_type
== NULL
)
22408 return build_error_marker_type (cu
, die
);
22413 /* Return the type in DIE, CU.
22414 Returns NULL for invalid types.
22416 This first does a lookup in die_type_hash,
22417 and only reads the die in if necessary.
22419 NOTE: This can be called when reading in partial or full symbols. */
22421 static struct type
*
22422 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22424 struct type
*this_type
;
22426 this_type
= get_die_type (die
, cu
);
22430 return read_type_die_1 (die
, cu
);
22433 /* Read the type in DIE, CU.
22434 Returns NULL for invalid types. */
22436 static struct type
*
22437 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22439 struct type
*this_type
= NULL
;
22443 case DW_TAG_class_type
:
22444 case DW_TAG_interface_type
:
22445 case DW_TAG_structure_type
:
22446 case DW_TAG_union_type
:
22447 this_type
= read_structure_type (die
, cu
);
22449 case DW_TAG_enumeration_type
:
22450 this_type
= read_enumeration_type (die
, cu
);
22452 case DW_TAG_subprogram
:
22453 case DW_TAG_subroutine_type
:
22454 case DW_TAG_inlined_subroutine
:
22455 this_type
= read_subroutine_type (die
, cu
);
22457 case DW_TAG_array_type
:
22458 this_type
= read_array_type (die
, cu
);
22460 case DW_TAG_set_type
:
22461 this_type
= read_set_type (die
, cu
);
22463 case DW_TAG_pointer_type
:
22464 this_type
= read_tag_pointer_type (die
, cu
);
22466 case DW_TAG_ptr_to_member_type
:
22467 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22469 case DW_TAG_reference_type
:
22470 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22472 case DW_TAG_rvalue_reference_type
:
22473 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22475 case DW_TAG_const_type
:
22476 this_type
= read_tag_const_type (die
, cu
);
22478 case DW_TAG_volatile_type
:
22479 this_type
= read_tag_volatile_type (die
, cu
);
22481 case DW_TAG_restrict_type
:
22482 this_type
= read_tag_restrict_type (die
, cu
);
22484 case DW_TAG_string_type
:
22485 this_type
= read_tag_string_type (die
, cu
);
22487 case DW_TAG_typedef
:
22488 this_type
= read_typedef (die
, cu
);
22490 case DW_TAG_subrange_type
:
22491 this_type
= read_subrange_type (die
, cu
);
22493 case DW_TAG_base_type
:
22494 this_type
= read_base_type (die
, cu
);
22496 case DW_TAG_unspecified_type
:
22497 this_type
= read_unspecified_type (die
, cu
);
22499 case DW_TAG_namespace
:
22500 this_type
= read_namespace_type (die
, cu
);
22502 case DW_TAG_module
:
22503 this_type
= read_module_type (die
, cu
);
22505 case DW_TAG_atomic_type
:
22506 this_type
= read_tag_atomic_type (die
, cu
);
22509 complaint (_("unexpected tag in read_type_die: '%s'"),
22510 dwarf_tag_name (die
->tag
));
22517 /* See if we can figure out if the class lives in a namespace. We do
22518 this by looking for a member function; its demangled name will
22519 contain namespace info, if there is any.
22520 Return the computed name or NULL.
22521 Space for the result is allocated on the objfile's obstack.
22522 This is the full-die version of guess_partial_die_structure_name.
22523 In this case we know DIE has no useful parent. */
22526 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22528 struct die_info
*spec_die
;
22529 struct dwarf2_cu
*spec_cu
;
22530 struct die_info
*child
;
22531 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22534 spec_die
= die_specification (die
, &spec_cu
);
22535 if (spec_die
!= NULL
)
22541 for (child
= die
->child
;
22543 child
= child
->sibling
)
22545 if (child
->tag
== DW_TAG_subprogram
)
22547 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22549 if (linkage_name
!= NULL
)
22552 = language_class_name_from_physname (cu
->language_defn
,
22556 if (actual_name
!= NULL
)
22558 const char *die_name
= dwarf2_name (die
, cu
);
22560 if (die_name
!= NULL
22561 && strcmp (die_name
, actual_name
) != 0)
22563 /* Strip off the class name from the full name.
22564 We want the prefix. */
22565 int die_name_len
= strlen (die_name
);
22566 int actual_name_len
= strlen (actual_name
);
22568 /* Test for '::' as a sanity check. */
22569 if (actual_name_len
> die_name_len
+ 2
22570 && actual_name
[actual_name_len
22571 - die_name_len
- 1] == ':')
22572 name
= obstack_strndup (
22573 &objfile
->per_bfd
->storage_obstack
,
22574 actual_name
, actual_name_len
- die_name_len
- 2);
22577 xfree (actual_name
);
22586 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22587 prefix part in such case. See
22588 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22590 static const char *
22591 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22593 struct attribute
*attr
;
22596 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22597 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22600 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22603 attr
= dw2_linkage_name_attr (die
, cu
);
22604 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22607 /* dwarf2_name had to be already called. */
22608 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22610 /* Strip the base name, keep any leading namespaces/classes. */
22611 base
= strrchr (DW_STRING (attr
), ':');
22612 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22615 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22616 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22618 &base
[-1] - DW_STRING (attr
));
22621 /* Return the name of the namespace/class that DIE is defined within,
22622 or "" if we can't tell. The caller should not xfree the result.
22624 For example, if we're within the method foo() in the following
22634 then determine_prefix on foo's die will return "N::C". */
22636 static const char *
22637 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22639 struct dwarf2_per_objfile
*dwarf2_per_objfile
22640 = cu
->per_cu
->dwarf2_per_objfile
;
22641 struct die_info
*parent
, *spec_die
;
22642 struct dwarf2_cu
*spec_cu
;
22643 struct type
*parent_type
;
22644 const char *retval
;
22646 if (cu
->language
!= language_cplus
22647 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22648 && cu
->language
!= language_rust
)
22651 retval
= anonymous_struct_prefix (die
, cu
);
22655 /* We have to be careful in the presence of DW_AT_specification.
22656 For example, with GCC 3.4, given the code
22660 // Definition of N::foo.
22664 then we'll have a tree of DIEs like this:
22666 1: DW_TAG_compile_unit
22667 2: DW_TAG_namespace // N
22668 3: DW_TAG_subprogram // declaration of N::foo
22669 4: DW_TAG_subprogram // definition of N::foo
22670 DW_AT_specification // refers to die #3
22672 Thus, when processing die #4, we have to pretend that we're in
22673 the context of its DW_AT_specification, namely the contex of die
22676 spec_die
= die_specification (die
, &spec_cu
);
22677 if (spec_die
== NULL
)
22678 parent
= die
->parent
;
22681 parent
= spec_die
->parent
;
22685 if (parent
== NULL
)
22687 else if (parent
->building_fullname
)
22690 const char *parent_name
;
22692 /* It has been seen on RealView 2.2 built binaries,
22693 DW_TAG_template_type_param types actually _defined_ as
22694 children of the parent class:
22697 template class <class Enum> Class{};
22698 Class<enum E> class_e;
22700 1: DW_TAG_class_type (Class)
22701 2: DW_TAG_enumeration_type (E)
22702 3: DW_TAG_enumerator (enum1:0)
22703 3: DW_TAG_enumerator (enum2:1)
22705 2: DW_TAG_template_type_param
22706 DW_AT_type DW_FORM_ref_udata (E)
22708 Besides being broken debug info, it can put GDB into an
22709 infinite loop. Consider:
22711 When we're building the full name for Class<E>, we'll start
22712 at Class, and go look over its template type parameters,
22713 finding E. We'll then try to build the full name of E, and
22714 reach here. We're now trying to build the full name of E,
22715 and look over the parent DIE for containing scope. In the
22716 broken case, if we followed the parent DIE of E, we'd again
22717 find Class, and once again go look at its template type
22718 arguments, etc., etc. Simply don't consider such parent die
22719 as source-level parent of this die (it can't be, the language
22720 doesn't allow it), and break the loop here. */
22721 name
= dwarf2_name (die
, cu
);
22722 parent_name
= dwarf2_name (parent
, cu
);
22723 complaint (_("template param type '%s' defined within parent '%s'"),
22724 name
? name
: "<unknown>",
22725 parent_name
? parent_name
: "<unknown>");
22729 switch (parent
->tag
)
22731 case DW_TAG_namespace
:
22732 parent_type
= read_type_die (parent
, cu
);
22733 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22734 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22735 Work around this problem here. */
22736 if (cu
->language
== language_cplus
22737 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22739 /* We give a name to even anonymous namespaces. */
22740 return TYPE_NAME (parent_type
);
22741 case DW_TAG_class_type
:
22742 case DW_TAG_interface_type
:
22743 case DW_TAG_structure_type
:
22744 case DW_TAG_union_type
:
22745 case DW_TAG_module
:
22746 parent_type
= read_type_die (parent
, cu
);
22747 if (TYPE_NAME (parent_type
) != NULL
)
22748 return TYPE_NAME (parent_type
);
22750 /* An anonymous structure is only allowed non-static data
22751 members; no typedefs, no member functions, et cetera.
22752 So it does not need a prefix. */
22754 case DW_TAG_compile_unit
:
22755 case DW_TAG_partial_unit
:
22756 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22757 if (cu
->language
== language_cplus
22758 && !dwarf2_per_objfile
->types
.empty ()
22759 && die
->child
!= NULL
22760 && (die
->tag
== DW_TAG_class_type
22761 || die
->tag
== DW_TAG_structure_type
22762 || die
->tag
== DW_TAG_union_type
))
22764 char *name
= guess_full_die_structure_name (die
, cu
);
22769 case DW_TAG_subprogram
:
22770 /* Nested subroutines in Fortran get a prefix with the name
22771 of the parent's subroutine. */
22772 if (cu
->language
== language_fortran
)
22774 if ((die
->tag
== DW_TAG_subprogram
)
22775 && (dwarf2_name (parent
, cu
) != NULL
))
22776 return dwarf2_name (parent
, cu
);
22778 return determine_prefix (parent
, cu
);
22779 case DW_TAG_enumeration_type
:
22780 parent_type
= read_type_die (parent
, cu
);
22781 if (TYPE_DECLARED_CLASS (parent_type
))
22783 if (TYPE_NAME (parent_type
) != NULL
)
22784 return TYPE_NAME (parent_type
);
22787 /* Fall through. */
22789 return determine_prefix (parent
, cu
);
22793 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22794 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22795 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22796 an obconcat, otherwise allocate storage for the result. The CU argument is
22797 used to determine the language and hence, the appropriate separator. */
22799 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22802 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22803 int physname
, struct dwarf2_cu
*cu
)
22805 const char *lead
= "";
22808 if (suffix
== NULL
|| suffix
[0] == '\0'
22809 || prefix
== NULL
|| prefix
[0] == '\0')
22811 else if (cu
->language
== language_d
)
22813 /* For D, the 'main' function could be defined in any module, but it
22814 should never be prefixed. */
22815 if (strcmp (suffix
, "D main") == 0)
22823 else if (cu
->language
== language_fortran
&& physname
)
22825 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22826 DW_AT_MIPS_linkage_name is preferred and used instead. */
22834 if (prefix
== NULL
)
22836 if (suffix
== NULL
)
22843 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22845 strcpy (retval
, lead
);
22846 strcat (retval
, prefix
);
22847 strcat (retval
, sep
);
22848 strcat (retval
, suffix
);
22853 /* We have an obstack. */
22854 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22858 /* Return sibling of die, NULL if no sibling. */
22860 static struct die_info
*
22861 sibling_die (struct die_info
*die
)
22863 return die
->sibling
;
22866 /* Get name of a die, return NULL if not found. */
22868 static const char *
22869 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22870 struct obstack
*obstack
)
22872 if (name
&& cu
->language
== language_cplus
)
22874 std::string canon_name
= cp_canonicalize_string (name
);
22876 if (!canon_name
.empty ())
22878 if (canon_name
!= name
)
22879 name
= obstack_strdup (obstack
, canon_name
);
22886 /* Get name of a die, return NULL if not found.
22887 Anonymous namespaces are converted to their magic string. */
22889 static const char *
22890 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22892 struct attribute
*attr
;
22893 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22895 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22896 if ((!attr
|| !DW_STRING (attr
))
22897 && die
->tag
!= DW_TAG_namespace
22898 && die
->tag
!= DW_TAG_class_type
22899 && die
->tag
!= DW_TAG_interface_type
22900 && die
->tag
!= DW_TAG_structure_type
22901 && die
->tag
!= DW_TAG_union_type
)
22906 case DW_TAG_compile_unit
:
22907 case DW_TAG_partial_unit
:
22908 /* Compilation units have a DW_AT_name that is a filename, not
22909 a source language identifier. */
22910 case DW_TAG_enumeration_type
:
22911 case DW_TAG_enumerator
:
22912 /* These tags always have simple identifiers already; no need
22913 to canonicalize them. */
22914 return DW_STRING (attr
);
22916 case DW_TAG_namespace
:
22917 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22918 return DW_STRING (attr
);
22919 return CP_ANONYMOUS_NAMESPACE_STR
;
22921 case DW_TAG_class_type
:
22922 case DW_TAG_interface_type
:
22923 case DW_TAG_structure_type
:
22924 case DW_TAG_union_type
:
22925 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22926 structures or unions. These were of the form "._%d" in GCC 4.1,
22927 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22928 and GCC 4.4. We work around this problem by ignoring these. */
22929 if (attr
&& DW_STRING (attr
)
22930 && (startswith (DW_STRING (attr
), "._")
22931 || startswith (DW_STRING (attr
), "<anonymous")))
22934 /* GCC might emit a nameless typedef that has a linkage name. See
22935 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22936 if (!attr
|| DW_STRING (attr
) == NULL
)
22938 char *demangled
= NULL
;
22940 attr
= dw2_linkage_name_attr (die
, cu
);
22941 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22944 /* Avoid demangling DW_STRING (attr) the second time on a second
22945 call for the same DIE. */
22946 if (!DW_STRING_IS_CANONICAL (attr
))
22947 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22953 /* FIXME: we already did this for the partial symbol... */
22955 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
22957 DW_STRING_IS_CANONICAL (attr
) = 1;
22960 /* Strip any leading namespaces/classes, keep only the base name.
22961 DW_AT_name for named DIEs does not contain the prefixes. */
22962 base
= strrchr (DW_STRING (attr
), ':');
22963 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22966 return DW_STRING (attr
);
22975 if (!DW_STRING_IS_CANONICAL (attr
))
22978 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22979 &objfile
->per_bfd
->storage_obstack
);
22980 DW_STRING_IS_CANONICAL (attr
) = 1;
22982 return DW_STRING (attr
);
22985 /* Return the die that this die in an extension of, or NULL if there
22986 is none. *EXT_CU is the CU containing DIE on input, and the CU
22987 containing the return value on output. */
22989 static struct die_info
*
22990 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22992 struct attribute
*attr
;
22994 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22998 return follow_die_ref (die
, attr
, ext_cu
);
23001 /* A convenience function that returns an "unknown" DWARF name,
23002 including the value of V. STR is the name of the entity being
23003 printed, e.g., "TAG". */
23005 static const char *
23006 dwarf_unknown (const char *str
, unsigned v
)
23008 char *cell
= get_print_cell ();
23009 xsnprintf (cell
, PRINT_CELL_SIZE
, "DW_%s_<unknown: %u>", str
, v
);
23013 /* Convert a DIE tag into its string name. */
23015 static const char *
23016 dwarf_tag_name (unsigned tag
)
23018 const char *name
= get_DW_TAG_name (tag
);
23021 return dwarf_unknown ("TAG", tag
);
23026 /* Convert a DWARF attribute code into its string name. */
23028 static const char *
23029 dwarf_attr_name (unsigned attr
)
23033 #ifdef MIPS /* collides with DW_AT_HP_block_index */
23034 if (attr
== DW_AT_MIPS_fde
)
23035 return "DW_AT_MIPS_fde";
23037 if (attr
== DW_AT_HP_block_index
)
23038 return "DW_AT_HP_block_index";
23041 name
= get_DW_AT_name (attr
);
23044 return dwarf_unknown ("AT", attr
);
23049 /* Convert a unit type to corresponding DW_UT name. */
23051 static const char *
23052 dwarf_unit_type_name (int unit_type
) {
23056 return "DW_UT_compile (0x01)";
23058 return "DW_UT_type (0x02)";
23060 return "DW_UT_partial (0x03)";
23062 return "DW_UT_skeleton (0x04)";
23064 return "DW_UT_split_compile (0x05)";
23066 return "DW_UT_split_type (0x06)";
23068 return "DW_UT_lo_user (0x80)";
23070 return "DW_UT_hi_user (0xff)";
23076 /* Convert a DWARF value form code into its string name. */
23078 static const char *
23079 dwarf_form_name (unsigned form
)
23081 const char *name
= get_DW_FORM_name (form
);
23084 return dwarf_unknown ("FORM", form
);
23089 static const char *
23090 dwarf_bool_name (unsigned mybool
)
23098 /* Convert a DWARF type code into its string name. */
23100 static const char *
23101 dwarf_type_encoding_name (unsigned enc
)
23103 const char *name
= get_DW_ATE_name (enc
);
23106 return dwarf_unknown ("ATE", enc
);
23112 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
23116 print_spaces (indent
, f
);
23117 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
23118 dwarf_tag_name (die
->tag
), die
->abbrev
,
23119 sect_offset_str (die
->sect_off
));
23121 if (die
->parent
!= NULL
)
23123 print_spaces (indent
, f
);
23124 fprintf_unfiltered (f
, " parent at offset: %s\n",
23125 sect_offset_str (die
->parent
->sect_off
));
23128 print_spaces (indent
, f
);
23129 fprintf_unfiltered (f
, " has children: %s\n",
23130 dwarf_bool_name (die
->child
!= NULL
));
23132 print_spaces (indent
, f
);
23133 fprintf_unfiltered (f
, " attributes:\n");
23135 for (i
= 0; i
< die
->num_attrs
; ++i
)
23137 print_spaces (indent
, f
);
23138 fprintf_unfiltered (f
, " %s (%s) ",
23139 dwarf_attr_name (die
->attrs
[i
].name
),
23140 dwarf_form_name (die
->attrs
[i
].form
));
23142 switch (die
->attrs
[i
].form
)
23145 case DW_FORM_addrx
:
23146 case DW_FORM_GNU_addr_index
:
23147 fprintf_unfiltered (f
, "address: ");
23148 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
23150 case DW_FORM_block2
:
23151 case DW_FORM_block4
:
23152 case DW_FORM_block
:
23153 case DW_FORM_block1
:
23154 fprintf_unfiltered (f
, "block: size %s",
23155 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
23157 case DW_FORM_exprloc
:
23158 fprintf_unfiltered (f
, "expression: size %s",
23159 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
23161 case DW_FORM_data16
:
23162 fprintf_unfiltered (f
, "constant of 16 bytes");
23164 case DW_FORM_ref_addr
:
23165 fprintf_unfiltered (f
, "ref address: ");
23166 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
23168 case DW_FORM_GNU_ref_alt
:
23169 fprintf_unfiltered (f
, "alt ref address: ");
23170 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
23176 case DW_FORM_ref_udata
:
23177 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
23178 (long) (DW_UNSND (&die
->attrs
[i
])));
23180 case DW_FORM_data1
:
23181 case DW_FORM_data2
:
23182 case DW_FORM_data4
:
23183 case DW_FORM_data8
:
23184 case DW_FORM_udata
:
23185 case DW_FORM_sdata
:
23186 fprintf_unfiltered (f
, "constant: %s",
23187 pulongest (DW_UNSND (&die
->attrs
[i
])));
23189 case DW_FORM_sec_offset
:
23190 fprintf_unfiltered (f
, "section offset: %s",
23191 pulongest (DW_UNSND (&die
->attrs
[i
])));
23193 case DW_FORM_ref_sig8
:
23194 fprintf_unfiltered (f
, "signature: %s",
23195 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
23197 case DW_FORM_string
:
23199 case DW_FORM_line_strp
:
23201 case DW_FORM_GNU_str_index
:
23202 case DW_FORM_GNU_strp_alt
:
23203 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
23204 DW_STRING (&die
->attrs
[i
])
23205 ? DW_STRING (&die
->attrs
[i
]) : "",
23206 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
23209 if (DW_UNSND (&die
->attrs
[i
]))
23210 fprintf_unfiltered (f
, "flag: TRUE");
23212 fprintf_unfiltered (f
, "flag: FALSE");
23214 case DW_FORM_flag_present
:
23215 fprintf_unfiltered (f
, "flag: TRUE");
23217 case DW_FORM_indirect
:
23218 /* The reader will have reduced the indirect form to
23219 the "base form" so this form should not occur. */
23220 fprintf_unfiltered (f
,
23221 "unexpected attribute form: DW_FORM_indirect");
23223 case DW_FORM_implicit_const
:
23224 fprintf_unfiltered (f
, "constant: %s",
23225 plongest (DW_SND (&die
->attrs
[i
])));
23228 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
23229 die
->attrs
[i
].form
);
23232 fprintf_unfiltered (f
, "\n");
23237 dump_die_for_error (struct die_info
*die
)
23239 dump_die_shallow (gdb_stderr
, 0, die
);
23243 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
23245 int indent
= level
* 4;
23247 gdb_assert (die
!= NULL
);
23249 if (level
>= max_level
)
23252 dump_die_shallow (f
, indent
, die
);
23254 if (die
->child
!= NULL
)
23256 print_spaces (indent
, f
);
23257 fprintf_unfiltered (f
, " Children:");
23258 if (level
+ 1 < max_level
)
23260 fprintf_unfiltered (f
, "\n");
23261 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
23265 fprintf_unfiltered (f
,
23266 " [not printed, max nesting level reached]\n");
23270 if (die
->sibling
!= NULL
&& level
> 0)
23272 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23276 /* This is called from the pdie macro in gdbinit.in.
23277 It's not static so gcc will keep a copy callable from gdb. */
23280 dump_die (struct die_info
*die
, int max_level
)
23282 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23286 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23290 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23291 to_underlying (die
->sect_off
),
23297 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
23301 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
23303 if (attr_form_is_ref (attr
))
23304 return (sect_offset
) DW_UNSND (attr
);
23306 complaint (_("unsupported die ref attribute form: '%s'"),
23307 dwarf_form_name (attr
->form
));
23311 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
23312 * the value held by the attribute is not constant. */
23315 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
23317 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
23318 return DW_SND (attr
);
23319 else if (attr
->form
== DW_FORM_udata
23320 || attr
->form
== DW_FORM_data1
23321 || attr
->form
== DW_FORM_data2
23322 || attr
->form
== DW_FORM_data4
23323 || attr
->form
== DW_FORM_data8
)
23324 return DW_UNSND (attr
);
23327 /* For DW_FORM_data16 see attr_form_is_constant. */
23328 complaint (_("Attribute value is not a constant (%s)"),
23329 dwarf_form_name (attr
->form
));
23330 return default_value
;
23334 /* Follow reference or signature attribute ATTR of SRC_DIE.
23335 On entry *REF_CU is the CU of SRC_DIE.
23336 On exit *REF_CU is the CU of the result. */
23338 static struct die_info
*
23339 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23340 struct dwarf2_cu
**ref_cu
)
23342 struct die_info
*die
;
23344 if (attr_form_is_ref (attr
))
23345 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23346 else if (attr
->form
== DW_FORM_ref_sig8
)
23347 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23350 dump_die_for_error (src_die
);
23351 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23352 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23358 /* Follow reference OFFSET.
23359 On entry *REF_CU is the CU of the source die referencing OFFSET.
23360 On exit *REF_CU is the CU of the result.
23361 Returns NULL if OFFSET is invalid. */
23363 static struct die_info
*
23364 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23365 struct dwarf2_cu
**ref_cu
)
23367 struct die_info temp_die
;
23368 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23369 struct dwarf2_per_objfile
*dwarf2_per_objfile
23370 = cu
->per_cu
->dwarf2_per_objfile
;
23372 gdb_assert (cu
->per_cu
!= NULL
);
23376 if (cu
->per_cu
->is_debug_types
)
23378 /* .debug_types CUs cannot reference anything outside their CU.
23379 If they need to, they have to reference a signatured type via
23380 DW_FORM_ref_sig8. */
23381 if (!offset_in_cu_p (&cu
->header
, sect_off
))
23384 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23385 || !offset_in_cu_p (&cu
->header
, sect_off
))
23387 struct dwarf2_per_cu_data
*per_cu
;
23389 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23390 dwarf2_per_objfile
);
23392 /* If necessary, add it to the queue and load its DIEs. */
23393 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
23394 load_full_comp_unit (per_cu
, false, cu
->language
);
23396 target_cu
= per_cu
->cu
;
23398 else if (cu
->dies
== NULL
)
23400 /* We're loading full DIEs during partial symbol reading. */
23401 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
23402 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
23405 *ref_cu
= target_cu
;
23406 temp_die
.sect_off
= sect_off
;
23408 if (target_cu
!= cu
)
23409 target_cu
->ancestor
= cu
;
23411 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23413 to_underlying (sect_off
));
23416 /* Follow reference attribute ATTR of SRC_DIE.
23417 On entry *REF_CU is the CU of SRC_DIE.
23418 On exit *REF_CU is the CU of the result. */
23420 static struct die_info
*
23421 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23422 struct dwarf2_cu
**ref_cu
)
23424 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
23425 struct dwarf2_cu
*cu
= *ref_cu
;
23426 struct die_info
*die
;
23428 die
= follow_die_offset (sect_off
,
23429 (attr
->form
== DW_FORM_GNU_ref_alt
23430 || cu
->per_cu
->is_dwz
),
23433 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23434 "at %s [in module %s]"),
23435 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23436 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
23441 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
23442 Returned value is intended for DW_OP_call*. Returned
23443 dwarf2_locexpr_baton->data has lifetime of
23444 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
23446 struct dwarf2_locexpr_baton
23447 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23448 struct dwarf2_per_cu_data
*per_cu
,
23449 CORE_ADDR (*get_frame_pc
) (void *baton
),
23450 void *baton
, bool resolve_abstract_p
)
23452 struct dwarf2_cu
*cu
;
23453 struct die_info
*die
;
23454 struct attribute
*attr
;
23455 struct dwarf2_locexpr_baton retval
;
23456 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23457 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23459 if (per_cu
->cu
== NULL
)
23460 load_cu (per_cu
, false);
23464 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23465 Instead just throw an error, not much else we can do. */
23466 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23467 sect_offset_str (sect_off
), objfile_name (objfile
));
23470 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23472 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23473 sect_offset_str (sect_off
), objfile_name (objfile
));
23475 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23476 if (!attr
&& resolve_abstract_p
23477 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
23478 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
23480 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23482 = ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23483 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
23485 for (const auto &cand_off
23486 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
23488 struct dwarf2_cu
*cand_cu
= cu
;
23489 struct die_info
*cand
23490 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23493 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23496 CORE_ADDR pc_low
, pc_high
;
23497 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23498 if (pc_low
== ((CORE_ADDR
) -1))
23500 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
23501 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
23502 if (!(pc_low
<= pc
&& pc
< pc_high
))
23506 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23513 /* DWARF: "If there is no such attribute, then there is no effect.".
23514 DATA is ignored if SIZE is 0. */
23516 retval
.data
= NULL
;
23519 else if (attr_form_is_section_offset (attr
))
23521 struct dwarf2_loclist_baton loclist_baton
;
23522 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23525 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23527 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23529 retval
.size
= size
;
23533 if (!attr_form_is_block (attr
))
23534 error (_("Dwarf Error: DIE at %s referenced in module %s "
23535 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23536 sect_offset_str (sect_off
), objfile_name (objfile
));
23538 retval
.data
= DW_BLOCK (attr
)->data
;
23539 retval
.size
= DW_BLOCK (attr
)->size
;
23541 retval
.per_cu
= cu
->per_cu
;
23543 age_cached_comp_units (dwarf2_per_objfile
);
23548 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23551 struct dwarf2_locexpr_baton
23552 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23553 struct dwarf2_per_cu_data
*per_cu
,
23554 CORE_ADDR (*get_frame_pc
) (void *baton
),
23557 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23559 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23562 /* Write a constant of a given type as target-ordered bytes into
23565 static const gdb_byte
*
23566 write_constant_as_bytes (struct obstack
*obstack
,
23567 enum bfd_endian byte_order
,
23574 *len
= TYPE_LENGTH (type
);
23575 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23576 store_unsigned_integer (result
, *len
, byte_order
, value
);
23581 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23582 pointer to the constant bytes and set LEN to the length of the
23583 data. If memory is needed, allocate it on OBSTACK. If the DIE
23584 does not have a DW_AT_const_value, return NULL. */
23587 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23588 struct dwarf2_per_cu_data
*per_cu
,
23589 struct obstack
*obstack
,
23592 struct dwarf2_cu
*cu
;
23593 struct die_info
*die
;
23594 struct attribute
*attr
;
23595 const gdb_byte
*result
= NULL
;
23598 enum bfd_endian byte_order
;
23599 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23601 if (per_cu
->cu
== NULL
)
23602 load_cu (per_cu
, false);
23606 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23607 Instead just throw an error, not much else we can do. */
23608 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23609 sect_offset_str (sect_off
), objfile_name (objfile
));
23612 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23614 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23615 sect_offset_str (sect_off
), objfile_name (objfile
));
23617 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23621 byte_order
= (bfd_big_endian (objfile
->obfd
)
23622 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23624 switch (attr
->form
)
23627 case DW_FORM_addrx
:
23628 case DW_FORM_GNU_addr_index
:
23632 *len
= cu
->header
.addr_size
;
23633 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23634 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23638 case DW_FORM_string
:
23641 case DW_FORM_GNU_str_index
:
23642 case DW_FORM_GNU_strp_alt
:
23643 /* DW_STRING is already allocated on the objfile obstack, point
23645 result
= (const gdb_byte
*) DW_STRING (attr
);
23646 *len
= strlen (DW_STRING (attr
));
23648 case DW_FORM_block1
:
23649 case DW_FORM_block2
:
23650 case DW_FORM_block4
:
23651 case DW_FORM_block
:
23652 case DW_FORM_exprloc
:
23653 case DW_FORM_data16
:
23654 result
= DW_BLOCK (attr
)->data
;
23655 *len
= DW_BLOCK (attr
)->size
;
23658 /* The DW_AT_const_value attributes are supposed to carry the
23659 symbol's value "represented as it would be on the target
23660 architecture." By the time we get here, it's already been
23661 converted to host endianness, so we just need to sign- or
23662 zero-extend it as appropriate. */
23663 case DW_FORM_data1
:
23664 type
= die_type (die
, cu
);
23665 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23666 if (result
== NULL
)
23667 result
= write_constant_as_bytes (obstack
, byte_order
,
23670 case DW_FORM_data2
:
23671 type
= die_type (die
, cu
);
23672 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23673 if (result
== NULL
)
23674 result
= write_constant_as_bytes (obstack
, byte_order
,
23677 case DW_FORM_data4
:
23678 type
= die_type (die
, cu
);
23679 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23680 if (result
== NULL
)
23681 result
= write_constant_as_bytes (obstack
, byte_order
,
23684 case DW_FORM_data8
:
23685 type
= die_type (die
, cu
);
23686 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23687 if (result
== NULL
)
23688 result
= write_constant_as_bytes (obstack
, byte_order
,
23692 case DW_FORM_sdata
:
23693 case DW_FORM_implicit_const
:
23694 type
= die_type (die
, cu
);
23695 result
= write_constant_as_bytes (obstack
, byte_order
,
23696 type
, DW_SND (attr
), len
);
23699 case DW_FORM_udata
:
23700 type
= die_type (die
, cu
);
23701 result
= write_constant_as_bytes (obstack
, byte_order
,
23702 type
, DW_UNSND (attr
), len
);
23706 complaint (_("unsupported const value attribute form: '%s'"),
23707 dwarf_form_name (attr
->form
));
23714 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23715 valid type for this die is found. */
23718 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23719 struct dwarf2_per_cu_data
*per_cu
)
23721 struct dwarf2_cu
*cu
;
23722 struct die_info
*die
;
23724 if (per_cu
->cu
== NULL
)
23725 load_cu (per_cu
, false);
23730 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23734 return die_type (die
, cu
);
23737 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23741 dwarf2_get_die_type (cu_offset die_offset
,
23742 struct dwarf2_per_cu_data
*per_cu
)
23744 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23745 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23748 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23749 On entry *REF_CU is the CU of SRC_DIE.
23750 On exit *REF_CU is the CU of the result.
23751 Returns NULL if the referenced DIE isn't found. */
23753 static struct die_info
*
23754 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23755 struct dwarf2_cu
**ref_cu
)
23757 struct die_info temp_die
;
23758 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23759 struct die_info
*die
;
23761 /* While it might be nice to assert sig_type->type == NULL here,
23762 we can get here for DW_AT_imported_declaration where we need
23763 the DIE not the type. */
23765 /* If necessary, add it to the queue and load its DIEs. */
23767 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23768 read_signatured_type (sig_type
);
23770 sig_cu
= sig_type
->per_cu
.cu
;
23771 gdb_assert (sig_cu
!= NULL
);
23772 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23773 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23774 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23775 to_underlying (temp_die
.sect_off
));
23778 struct dwarf2_per_objfile
*dwarf2_per_objfile
23779 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23781 /* For .gdb_index version 7 keep track of included TUs.
23782 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23783 if (dwarf2_per_objfile
->index_table
!= NULL
23784 && dwarf2_per_objfile
->index_table
->version
<= 7)
23786 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
23791 sig_cu
->ancestor
= cu
;
23799 /* Follow signatured type referenced by ATTR in SRC_DIE.
23800 On entry *REF_CU is the CU of SRC_DIE.
23801 On exit *REF_CU is the CU of the result.
23802 The result is the DIE of the type.
23803 If the referenced type cannot be found an error is thrown. */
23805 static struct die_info
*
23806 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23807 struct dwarf2_cu
**ref_cu
)
23809 ULONGEST signature
= DW_SIGNATURE (attr
);
23810 struct signatured_type
*sig_type
;
23811 struct die_info
*die
;
23813 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23815 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23816 /* sig_type will be NULL if the signatured type is missing from
23818 if (sig_type
== NULL
)
23820 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23821 " from DIE at %s [in module %s]"),
23822 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23823 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23826 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23829 dump_die_for_error (src_die
);
23830 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23831 " from DIE at %s [in module %s]"),
23832 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23833 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23839 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23840 reading in and processing the type unit if necessary. */
23842 static struct type
*
23843 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23844 struct dwarf2_cu
*cu
)
23846 struct dwarf2_per_objfile
*dwarf2_per_objfile
23847 = cu
->per_cu
->dwarf2_per_objfile
;
23848 struct signatured_type
*sig_type
;
23849 struct dwarf2_cu
*type_cu
;
23850 struct die_info
*type_die
;
23853 sig_type
= lookup_signatured_type (cu
, signature
);
23854 /* sig_type will be NULL if the signatured type is missing from
23856 if (sig_type
== NULL
)
23858 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23859 " from DIE at %s [in module %s]"),
23860 hex_string (signature
), sect_offset_str (die
->sect_off
),
23861 objfile_name (dwarf2_per_objfile
->objfile
));
23862 return build_error_marker_type (cu
, die
);
23865 /* If we already know the type we're done. */
23866 if (sig_type
->type
!= NULL
)
23867 return sig_type
->type
;
23870 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23871 if (type_die
!= NULL
)
23873 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23874 is created. This is important, for example, because for c++ classes
23875 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23876 type
= read_type_die (type_die
, type_cu
);
23879 complaint (_("Dwarf Error: Cannot build signatured type %s"
23880 " referenced from DIE at %s [in module %s]"),
23881 hex_string (signature
), sect_offset_str (die
->sect_off
),
23882 objfile_name (dwarf2_per_objfile
->objfile
));
23883 type
= build_error_marker_type (cu
, die
);
23888 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23889 " from DIE at %s [in module %s]"),
23890 hex_string (signature
), sect_offset_str (die
->sect_off
),
23891 objfile_name (dwarf2_per_objfile
->objfile
));
23892 type
= build_error_marker_type (cu
, die
);
23894 sig_type
->type
= type
;
23899 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23900 reading in and processing the type unit if necessary. */
23902 static struct type
*
23903 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23904 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23906 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23907 if (attr_form_is_ref (attr
))
23909 struct dwarf2_cu
*type_cu
= cu
;
23910 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23912 return read_type_die (type_die
, type_cu
);
23914 else if (attr
->form
== DW_FORM_ref_sig8
)
23916 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23920 struct dwarf2_per_objfile
*dwarf2_per_objfile
23921 = cu
->per_cu
->dwarf2_per_objfile
;
23923 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23924 " at %s [in module %s]"),
23925 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23926 objfile_name (dwarf2_per_objfile
->objfile
));
23927 return build_error_marker_type (cu
, die
);
23931 /* Load the DIEs associated with type unit PER_CU into memory. */
23934 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23936 struct signatured_type
*sig_type
;
23938 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23939 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23941 /* We have the per_cu, but we need the signatured_type.
23942 Fortunately this is an easy translation. */
23943 gdb_assert (per_cu
->is_debug_types
);
23944 sig_type
= (struct signatured_type
*) per_cu
;
23946 gdb_assert (per_cu
->cu
== NULL
);
23948 read_signatured_type (sig_type
);
23950 gdb_assert (per_cu
->cu
!= NULL
);
23953 /* die_reader_func for read_signatured_type.
23954 This is identical to load_full_comp_unit_reader,
23955 but is kept separate for now. */
23958 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23959 const gdb_byte
*info_ptr
,
23960 struct die_info
*comp_unit_die
,
23964 struct dwarf2_cu
*cu
= reader
->cu
;
23966 gdb_assert (cu
->die_hash
== NULL
);
23968 htab_create_alloc_ex (cu
->header
.length
/ 12,
23972 &cu
->comp_unit_obstack
,
23973 hashtab_obstack_allocate
,
23974 dummy_obstack_deallocate
);
23977 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23978 &info_ptr
, comp_unit_die
);
23979 cu
->dies
= comp_unit_die
;
23980 /* comp_unit_die is not stored in die_hash, no need. */
23982 /* We try not to read any attributes in this function, because not
23983 all CUs needed for references have been loaded yet, and symbol
23984 table processing isn't initialized. But we have to set the CU language,
23985 or we won't be able to build types correctly.
23986 Similarly, if we do not read the producer, we can not apply
23987 producer-specific interpretation. */
23988 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23991 /* Read in a signatured type and build its CU and DIEs.
23992 If the type is a stub for the real type in a DWO file,
23993 read in the real type from the DWO file as well. */
23996 read_signatured_type (struct signatured_type
*sig_type
)
23998 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
24000 gdb_assert (per_cu
->is_debug_types
);
24001 gdb_assert (per_cu
->cu
== NULL
);
24003 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
24004 read_signatured_type_reader
, NULL
);
24005 sig_type
->per_cu
.tu_read
= 1;
24008 /* Decode simple location descriptions.
24009 Given a pointer to a dwarf block that defines a location, compute
24010 the location and return the value.
24012 NOTE drow/2003-11-18: This function is called in two situations
24013 now: for the address of static or global variables (partial symbols
24014 only) and for offsets into structures which are expected to be
24015 (more or less) constant. The partial symbol case should go away,
24016 and only the constant case should remain. That will let this
24017 function complain more accurately. A few special modes are allowed
24018 without complaint for global variables (for instance, global
24019 register values and thread-local values).
24021 A location description containing no operations indicates that the
24022 object is optimized out. The return value is 0 for that case.
24023 FIXME drow/2003-11-16: No callers check for this case any more; soon all
24024 callers will only want a very basic result and this can become a
24027 Note that stack[0] is unused except as a default error return. */
24030 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
24032 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
24034 size_t size
= blk
->size
;
24035 const gdb_byte
*data
= blk
->data
;
24036 CORE_ADDR stack
[64];
24038 unsigned int bytes_read
, unsnd
;
24044 stack
[++stacki
] = 0;
24083 stack
[++stacki
] = op
- DW_OP_lit0
;
24118 stack
[++stacki
] = op
- DW_OP_reg0
;
24120 dwarf2_complex_location_expr_complaint ();
24124 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
24126 stack
[++stacki
] = unsnd
;
24128 dwarf2_complex_location_expr_complaint ();
24132 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
24137 case DW_OP_const1u
:
24138 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
24142 case DW_OP_const1s
:
24143 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
24147 case DW_OP_const2u
:
24148 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
24152 case DW_OP_const2s
:
24153 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
24157 case DW_OP_const4u
:
24158 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
24162 case DW_OP_const4s
:
24163 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
24167 case DW_OP_const8u
:
24168 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
24173 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
24179 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
24184 stack
[stacki
+ 1] = stack
[stacki
];
24189 stack
[stacki
- 1] += stack
[stacki
];
24193 case DW_OP_plus_uconst
:
24194 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
24200 stack
[stacki
- 1] -= stack
[stacki
];
24205 /* If we're not the last op, then we definitely can't encode
24206 this using GDB's address_class enum. This is valid for partial
24207 global symbols, although the variable's address will be bogus
24210 dwarf2_complex_location_expr_complaint ();
24213 case DW_OP_GNU_push_tls_address
:
24214 case DW_OP_form_tls_address
:
24215 /* The top of the stack has the offset from the beginning
24216 of the thread control block at which the variable is located. */
24217 /* Nothing should follow this operator, so the top of stack would
24219 /* This is valid for partial global symbols, but the variable's
24220 address will be bogus in the psymtab. Make it always at least
24221 non-zero to not look as a variable garbage collected by linker
24222 which have DW_OP_addr 0. */
24224 dwarf2_complex_location_expr_complaint ();
24228 case DW_OP_GNU_uninit
:
24232 case DW_OP_GNU_addr_index
:
24233 case DW_OP_GNU_const_index
:
24234 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
24241 const char *name
= get_DW_OP_name (op
);
24244 complaint (_("unsupported stack op: '%s'"),
24247 complaint (_("unsupported stack op: '%02x'"),
24251 return (stack
[stacki
]);
24254 /* Enforce maximum stack depth of SIZE-1 to avoid writing
24255 outside of the allocated space. Also enforce minimum>0. */
24256 if (stacki
>= ARRAY_SIZE (stack
) - 1)
24258 complaint (_("location description stack overflow"));
24264 complaint (_("location description stack underflow"));
24268 return (stack
[stacki
]);
24271 /* memory allocation interface */
24273 static struct dwarf_block
*
24274 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24276 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24279 static struct die_info
*
24280 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24282 struct die_info
*die
;
24283 size_t size
= sizeof (struct die_info
);
24286 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24288 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24289 memset (die
, 0, sizeof (struct die_info
));
24294 /* Macro support. */
24296 /* Return file name relative to the compilation directory of file number I in
24297 *LH's file name table. The result is allocated using xmalloc; the caller is
24298 responsible for freeing it. */
24301 file_file_name (int file
, struct line_header
*lh
)
24303 /* Is the file number a valid index into the line header's file name
24304 table? Remember that file numbers start with one, not zero. */
24305 if (lh
->is_valid_file_index (file
))
24307 const file_entry
*fe
= lh
->file_name_at (file
);
24309 if (!IS_ABSOLUTE_PATH (fe
->name
))
24311 const char *dir
= fe
->include_dir (lh
);
24313 return concat (dir
, SLASH_STRING
, fe
->name
, (char *) NULL
);
24315 return xstrdup (fe
->name
);
24319 /* The compiler produced a bogus file number. We can at least
24320 record the macro definitions made in the file, even if we
24321 won't be able to find the file by name. */
24322 char fake_name
[80];
24324 xsnprintf (fake_name
, sizeof (fake_name
),
24325 "<bad macro file number %d>", file
);
24327 complaint (_("bad file number in macro information (%d)"),
24330 return xstrdup (fake_name
);
24334 /* Return the full name of file number I in *LH's file name table.
24335 Use COMP_DIR as the name of the current directory of the
24336 compilation. The result is allocated using xmalloc; the caller is
24337 responsible for freeing it. */
24339 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
24341 /* Is the file number a valid index into the line header's file name
24342 table? Remember that file numbers start with one, not zero. */
24343 if (lh
->is_valid_file_index (file
))
24345 char *relative
= file_file_name (file
, lh
);
24347 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
24349 return reconcat (relative
, comp_dir
, SLASH_STRING
,
24350 relative
, (char *) NULL
);
24353 return file_file_name (file
, lh
);
24357 static struct macro_source_file
*
24358 macro_start_file (struct dwarf2_cu
*cu
,
24359 int file
, int line
,
24360 struct macro_source_file
*current_file
,
24361 struct line_header
*lh
)
24363 /* File name relative to the compilation directory of this source file. */
24364 char *file_name
= file_file_name (file
, lh
);
24366 if (! current_file
)
24368 /* Note: We don't create a macro table for this compilation unit
24369 at all until we actually get a filename. */
24370 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
24372 /* If we have no current file, then this must be the start_file
24373 directive for the compilation unit's main source file. */
24374 current_file
= macro_set_main (macro_table
, file_name
);
24375 macro_define_special (macro_table
);
24378 current_file
= macro_include (current_file
, line
, file_name
);
24382 return current_file
;
24385 static const char *
24386 consume_improper_spaces (const char *p
, const char *body
)
24390 complaint (_("macro definition contains spaces "
24391 "in formal argument list:\n`%s'"),
24403 parse_macro_definition (struct macro_source_file
*file
, int line
,
24408 /* The body string takes one of two forms. For object-like macro
24409 definitions, it should be:
24411 <macro name> " " <definition>
24413 For function-like macro definitions, it should be:
24415 <macro name> "() " <definition>
24417 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
24419 Spaces may appear only where explicitly indicated, and in the
24422 The Dwarf 2 spec says that an object-like macro's name is always
24423 followed by a space, but versions of GCC around March 2002 omit
24424 the space when the macro's definition is the empty string.
24426 The Dwarf 2 spec says that there should be no spaces between the
24427 formal arguments in a function-like macro's formal argument list,
24428 but versions of GCC around March 2002 include spaces after the
24432 /* Find the extent of the macro name. The macro name is terminated
24433 by either a space or null character (for an object-like macro) or
24434 an opening paren (for a function-like macro). */
24435 for (p
= body
; *p
; p
++)
24436 if (*p
== ' ' || *p
== '(')
24439 if (*p
== ' ' || *p
== '\0')
24441 /* It's an object-like macro. */
24442 int name_len
= p
- body
;
24443 char *name
= savestring (body
, name_len
);
24444 const char *replacement
;
24447 replacement
= body
+ name_len
+ 1;
24450 dwarf2_macro_malformed_definition_complaint (body
);
24451 replacement
= body
+ name_len
;
24454 macro_define_object (file
, line
, name
, replacement
);
24458 else if (*p
== '(')
24460 /* It's a function-like macro. */
24461 char *name
= savestring (body
, p
- body
);
24464 char **argv
= XNEWVEC (char *, argv_size
);
24468 p
= consume_improper_spaces (p
, body
);
24470 /* Parse the formal argument list. */
24471 while (*p
&& *p
!= ')')
24473 /* Find the extent of the current argument name. */
24474 const char *arg_start
= p
;
24476 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
24479 if (! *p
|| p
== arg_start
)
24480 dwarf2_macro_malformed_definition_complaint (body
);
24483 /* Make sure argv has room for the new argument. */
24484 if (argc
>= argv_size
)
24487 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24490 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24493 p
= consume_improper_spaces (p
, body
);
24495 /* Consume the comma, if present. */
24500 p
= consume_improper_spaces (p
, body
);
24509 /* Perfectly formed definition, no complaints. */
24510 macro_define_function (file
, line
, name
,
24511 argc
, (const char **) argv
,
24513 else if (*p
== '\0')
24515 /* Complain, but do define it. */
24516 dwarf2_macro_malformed_definition_complaint (body
);
24517 macro_define_function (file
, line
, name
,
24518 argc
, (const char **) argv
,
24522 /* Just complain. */
24523 dwarf2_macro_malformed_definition_complaint (body
);
24526 /* Just complain. */
24527 dwarf2_macro_malformed_definition_complaint (body
);
24533 for (i
= 0; i
< argc
; i
++)
24539 dwarf2_macro_malformed_definition_complaint (body
);
24542 /* Skip some bytes from BYTES according to the form given in FORM.
24543 Returns the new pointer. */
24545 static const gdb_byte
*
24546 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24547 enum dwarf_form form
,
24548 unsigned int offset_size
,
24549 struct dwarf2_section_info
*section
)
24551 unsigned int bytes_read
;
24555 case DW_FORM_data1
:
24560 case DW_FORM_data2
:
24564 case DW_FORM_data4
:
24568 case DW_FORM_data8
:
24572 case DW_FORM_data16
:
24576 case DW_FORM_string
:
24577 read_direct_string (abfd
, bytes
, &bytes_read
);
24578 bytes
+= bytes_read
;
24581 case DW_FORM_sec_offset
:
24583 case DW_FORM_GNU_strp_alt
:
24584 bytes
+= offset_size
;
24587 case DW_FORM_block
:
24588 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24589 bytes
+= bytes_read
;
24592 case DW_FORM_block1
:
24593 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24595 case DW_FORM_block2
:
24596 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24598 case DW_FORM_block4
:
24599 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24602 case DW_FORM_addrx
:
24603 case DW_FORM_sdata
:
24605 case DW_FORM_udata
:
24606 case DW_FORM_GNU_addr_index
:
24607 case DW_FORM_GNU_str_index
:
24608 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24611 dwarf2_section_buffer_overflow_complaint (section
);
24616 case DW_FORM_implicit_const
:
24621 complaint (_("invalid form 0x%x in `%s'"),
24622 form
, get_section_name (section
));
24630 /* A helper for dwarf_decode_macros that handles skipping an unknown
24631 opcode. Returns an updated pointer to the macro data buffer; or,
24632 on error, issues a complaint and returns NULL. */
24634 static const gdb_byte
*
24635 skip_unknown_opcode (unsigned int opcode
,
24636 const gdb_byte
**opcode_definitions
,
24637 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24639 unsigned int offset_size
,
24640 struct dwarf2_section_info
*section
)
24642 unsigned int bytes_read
, i
;
24644 const gdb_byte
*defn
;
24646 if (opcode_definitions
[opcode
] == NULL
)
24648 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24653 defn
= opcode_definitions
[opcode
];
24654 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24655 defn
+= bytes_read
;
24657 for (i
= 0; i
< arg
; ++i
)
24659 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24660 (enum dwarf_form
) defn
[i
], offset_size
,
24662 if (mac_ptr
== NULL
)
24664 /* skip_form_bytes already issued the complaint. */
24672 /* A helper function which parses the header of a macro section.
24673 If the macro section is the extended (for now called "GNU") type,
24674 then this updates *OFFSET_SIZE. Returns a pointer to just after
24675 the header, or issues a complaint and returns NULL on error. */
24677 static const gdb_byte
*
24678 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24680 const gdb_byte
*mac_ptr
,
24681 unsigned int *offset_size
,
24682 int section_is_gnu
)
24684 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24686 if (section_is_gnu
)
24688 unsigned int version
, flags
;
24690 version
= read_2_bytes (abfd
, mac_ptr
);
24691 if (version
!= 4 && version
!= 5)
24693 complaint (_("unrecognized version `%d' in .debug_macro section"),
24699 flags
= read_1_byte (abfd
, mac_ptr
);
24701 *offset_size
= (flags
& 1) ? 8 : 4;
24703 if ((flags
& 2) != 0)
24704 /* We don't need the line table offset. */
24705 mac_ptr
+= *offset_size
;
24707 /* Vendor opcode descriptions. */
24708 if ((flags
& 4) != 0)
24710 unsigned int i
, count
;
24712 count
= read_1_byte (abfd
, mac_ptr
);
24714 for (i
= 0; i
< count
; ++i
)
24716 unsigned int opcode
, bytes_read
;
24719 opcode
= read_1_byte (abfd
, mac_ptr
);
24721 opcode_definitions
[opcode
] = mac_ptr
;
24722 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24723 mac_ptr
+= bytes_read
;
24732 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24733 including DW_MACRO_import. */
24736 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24738 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24739 struct macro_source_file
*current_file
,
24740 struct line_header
*lh
,
24741 struct dwarf2_section_info
*section
,
24742 int section_is_gnu
, int section_is_dwz
,
24743 unsigned int offset_size
,
24744 htab_t include_hash
)
24746 struct dwarf2_per_objfile
*dwarf2_per_objfile
24747 = cu
->per_cu
->dwarf2_per_objfile
;
24748 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24749 enum dwarf_macro_record_type macinfo_type
;
24750 int at_commandline
;
24751 const gdb_byte
*opcode_definitions
[256];
24753 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24754 &offset_size
, section_is_gnu
);
24755 if (mac_ptr
== NULL
)
24757 /* We already issued a complaint. */
24761 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24762 GDB is still reading the definitions from command line. First
24763 DW_MACINFO_start_file will need to be ignored as it was already executed
24764 to create CURRENT_FILE for the main source holding also the command line
24765 definitions. On first met DW_MACINFO_start_file this flag is reset to
24766 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24768 at_commandline
= 1;
24772 /* Do we at least have room for a macinfo type byte? */
24773 if (mac_ptr
>= mac_end
)
24775 dwarf2_section_buffer_overflow_complaint (section
);
24779 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24782 /* Note that we rely on the fact that the corresponding GNU and
24783 DWARF constants are the same. */
24785 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24786 switch (macinfo_type
)
24788 /* A zero macinfo type indicates the end of the macro
24793 case DW_MACRO_define
:
24794 case DW_MACRO_undef
:
24795 case DW_MACRO_define_strp
:
24796 case DW_MACRO_undef_strp
:
24797 case DW_MACRO_define_sup
:
24798 case DW_MACRO_undef_sup
:
24800 unsigned int bytes_read
;
24805 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24806 mac_ptr
+= bytes_read
;
24808 if (macinfo_type
== DW_MACRO_define
24809 || macinfo_type
== DW_MACRO_undef
)
24811 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24812 mac_ptr
+= bytes_read
;
24816 LONGEST str_offset
;
24818 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24819 mac_ptr
+= offset_size
;
24821 if (macinfo_type
== DW_MACRO_define_sup
24822 || macinfo_type
== DW_MACRO_undef_sup
24825 struct dwz_file
*dwz
24826 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24828 body
= read_indirect_string_from_dwz (objfile
,
24832 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24836 is_define
= (macinfo_type
== DW_MACRO_define
24837 || macinfo_type
== DW_MACRO_define_strp
24838 || macinfo_type
== DW_MACRO_define_sup
);
24839 if (! current_file
)
24841 /* DWARF violation as no main source is present. */
24842 complaint (_("debug info with no main source gives macro %s "
24844 is_define
? _("definition") : _("undefinition"),
24848 if ((line
== 0 && !at_commandline
)
24849 || (line
!= 0 && at_commandline
))
24850 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24851 at_commandline
? _("command-line") : _("in-file"),
24852 is_define
? _("definition") : _("undefinition"),
24853 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24857 /* Fedora's rpm-build's "debugedit" binary
24858 corrupted .debug_macro sections.
24861 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24862 complaint (_("debug info gives %s invalid macro %s "
24863 "without body (corrupted?) at line %d "
24865 at_commandline
? _("command-line") : _("in-file"),
24866 is_define
? _("definition") : _("undefinition"),
24867 line
, current_file
->filename
);
24869 else if (is_define
)
24870 parse_macro_definition (current_file
, line
, body
);
24873 gdb_assert (macinfo_type
== DW_MACRO_undef
24874 || macinfo_type
== DW_MACRO_undef_strp
24875 || macinfo_type
== DW_MACRO_undef_sup
);
24876 macro_undef (current_file
, line
, body
);
24881 case DW_MACRO_start_file
:
24883 unsigned int bytes_read
;
24886 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24887 mac_ptr
+= bytes_read
;
24888 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24889 mac_ptr
+= bytes_read
;
24891 if ((line
== 0 && !at_commandline
)
24892 || (line
!= 0 && at_commandline
))
24893 complaint (_("debug info gives source %d included "
24894 "from %s at %s line %d"),
24895 file
, at_commandline
? _("command-line") : _("file"),
24896 line
== 0 ? _("zero") : _("non-zero"), line
);
24898 if (at_commandline
)
24900 /* This DW_MACRO_start_file was executed in the
24902 at_commandline
= 0;
24905 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24910 case DW_MACRO_end_file
:
24911 if (! current_file
)
24912 complaint (_("macro debug info has an unmatched "
24913 "`close_file' directive"));
24916 current_file
= current_file
->included_by
;
24917 if (! current_file
)
24919 enum dwarf_macro_record_type next_type
;
24921 /* GCC circa March 2002 doesn't produce the zero
24922 type byte marking the end of the compilation
24923 unit. Complain if it's not there, but exit no
24926 /* Do we at least have room for a macinfo type byte? */
24927 if (mac_ptr
>= mac_end
)
24929 dwarf2_section_buffer_overflow_complaint (section
);
24933 /* We don't increment mac_ptr here, so this is just
24936 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24938 if (next_type
!= 0)
24939 complaint (_("no terminating 0-type entry for "
24940 "macros in `.debug_macinfo' section"));
24947 case DW_MACRO_import
:
24948 case DW_MACRO_import_sup
:
24952 bfd
*include_bfd
= abfd
;
24953 struct dwarf2_section_info
*include_section
= section
;
24954 const gdb_byte
*include_mac_end
= mac_end
;
24955 int is_dwz
= section_is_dwz
;
24956 const gdb_byte
*new_mac_ptr
;
24958 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24959 mac_ptr
+= offset_size
;
24961 if (macinfo_type
== DW_MACRO_import_sup
)
24963 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24965 dwarf2_read_section (objfile
, &dwz
->macro
);
24967 include_section
= &dwz
->macro
;
24968 include_bfd
= get_section_bfd_owner (include_section
);
24969 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24973 new_mac_ptr
= include_section
->buffer
+ offset
;
24974 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24978 /* This has actually happened; see
24979 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24980 complaint (_("recursive DW_MACRO_import in "
24981 ".debug_macro section"));
24985 *slot
= (void *) new_mac_ptr
;
24987 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24988 include_mac_end
, current_file
, lh
,
24989 section
, section_is_gnu
, is_dwz
,
24990 offset_size
, include_hash
);
24992 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24997 case DW_MACINFO_vendor_ext
:
24998 if (!section_is_gnu
)
25000 unsigned int bytes_read
;
25002 /* This reads the constant, but since we don't recognize
25003 any vendor extensions, we ignore it. */
25004 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25005 mac_ptr
+= bytes_read
;
25006 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
25007 mac_ptr
+= bytes_read
;
25009 /* We don't recognize any vendor extensions. */
25015 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
25016 mac_ptr
, mac_end
, abfd
, offset_size
,
25018 if (mac_ptr
== NULL
)
25023 } while (macinfo_type
!= 0);
25027 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
25028 int section_is_gnu
)
25030 struct dwarf2_per_objfile
*dwarf2_per_objfile
25031 = cu
->per_cu
->dwarf2_per_objfile
;
25032 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25033 struct line_header
*lh
= cu
->line_header
;
25035 const gdb_byte
*mac_ptr
, *mac_end
;
25036 struct macro_source_file
*current_file
= 0;
25037 enum dwarf_macro_record_type macinfo_type
;
25038 unsigned int offset_size
= cu
->header
.offset_size
;
25039 const gdb_byte
*opcode_definitions
[256];
25041 struct dwarf2_section_info
*section
;
25042 const char *section_name
;
25044 if (cu
->dwo_unit
!= NULL
)
25046 if (section_is_gnu
)
25048 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
25049 section_name
= ".debug_macro.dwo";
25053 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
25054 section_name
= ".debug_macinfo.dwo";
25059 if (section_is_gnu
)
25061 section
= &dwarf2_per_objfile
->macro
;
25062 section_name
= ".debug_macro";
25066 section
= &dwarf2_per_objfile
->macinfo
;
25067 section_name
= ".debug_macinfo";
25071 dwarf2_read_section (objfile
, section
);
25072 if (section
->buffer
== NULL
)
25074 complaint (_("missing %s section"), section_name
);
25077 abfd
= get_section_bfd_owner (section
);
25079 /* First pass: Find the name of the base filename.
25080 This filename is needed in order to process all macros whose definition
25081 (or undefinition) comes from the command line. These macros are defined
25082 before the first DW_MACINFO_start_file entry, and yet still need to be
25083 associated to the base file.
25085 To determine the base file name, we scan the macro definitions until we
25086 reach the first DW_MACINFO_start_file entry. We then initialize
25087 CURRENT_FILE accordingly so that any macro definition found before the
25088 first DW_MACINFO_start_file can still be associated to the base file. */
25090 mac_ptr
= section
->buffer
+ offset
;
25091 mac_end
= section
->buffer
+ section
->size
;
25093 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
25094 &offset_size
, section_is_gnu
);
25095 if (mac_ptr
== NULL
)
25097 /* We already issued a complaint. */
25103 /* Do we at least have room for a macinfo type byte? */
25104 if (mac_ptr
>= mac_end
)
25106 /* Complaint is printed during the second pass as GDB will probably
25107 stop the first pass earlier upon finding
25108 DW_MACINFO_start_file. */
25112 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
25115 /* Note that we rely on the fact that the corresponding GNU and
25116 DWARF constants are the same. */
25118 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
25119 switch (macinfo_type
)
25121 /* A zero macinfo type indicates the end of the macro
25126 case DW_MACRO_define
:
25127 case DW_MACRO_undef
:
25128 /* Only skip the data by MAC_PTR. */
25130 unsigned int bytes_read
;
25132 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25133 mac_ptr
+= bytes_read
;
25134 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
25135 mac_ptr
+= bytes_read
;
25139 case DW_MACRO_start_file
:
25141 unsigned int bytes_read
;
25144 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25145 mac_ptr
+= bytes_read
;
25146 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25147 mac_ptr
+= bytes_read
;
25149 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
25153 case DW_MACRO_end_file
:
25154 /* No data to skip by MAC_PTR. */
25157 case DW_MACRO_define_strp
:
25158 case DW_MACRO_undef_strp
:
25159 case DW_MACRO_define_sup
:
25160 case DW_MACRO_undef_sup
:
25162 unsigned int bytes_read
;
25164 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25165 mac_ptr
+= bytes_read
;
25166 mac_ptr
+= offset_size
;
25170 case DW_MACRO_import
:
25171 case DW_MACRO_import_sup
:
25172 /* Note that, according to the spec, a transparent include
25173 chain cannot call DW_MACRO_start_file. So, we can just
25174 skip this opcode. */
25175 mac_ptr
+= offset_size
;
25178 case DW_MACINFO_vendor_ext
:
25179 /* Only skip the data by MAC_PTR. */
25180 if (!section_is_gnu
)
25182 unsigned int bytes_read
;
25184 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
25185 mac_ptr
+= bytes_read
;
25186 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
25187 mac_ptr
+= bytes_read
;
25192 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
25193 mac_ptr
, mac_end
, abfd
, offset_size
,
25195 if (mac_ptr
== NULL
)
25200 } while (macinfo_type
!= 0 && current_file
== NULL
);
25202 /* Second pass: Process all entries.
25204 Use the AT_COMMAND_LINE flag to determine whether we are still processing
25205 command-line macro definitions/undefinitions. This flag is unset when we
25206 reach the first DW_MACINFO_start_file entry. */
25208 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
25210 NULL
, xcalloc
, xfree
));
25211 mac_ptr
= section
->buffer
+ offset
;
25212 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
25213 *slot
= (void *) mac_ptr
;
25214 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
25215 current_file
, lh
, section
,
25216 section_is_gnu
, 0, offset_size
,
25217 include_hash
.get ());
25220 /* Check if the attribute's form is a DW_FORM_block*
25221 if so return true else false. */
25224 attr_form_is_block (const struct attribute
*attr
)
25226 return (attr
== NULL
? 0 :
25227 attr
->form
== DW_FORM_block1
25228 || attr
->form
== DW_FORM_block2
25229 || attr
->form
== DW_FORM_block4
25230 || attr
->form
== DW_FORM_block
25231 || attr
->form
== DW_FORM_exprloc
);
25234 /* Return non-zero if ATTR's value is a section offset --- classes
25235 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
25236 You may use DW_UNSND (attr) to retrieve such offsets.
25238 Section 7.5.4, "Attribute Encodings", explains that no attribute
25239 may have a value that belongs to more than one of these classes; it
25240 would be ambiguous if we did, because we use the same forms for all
25244 attr_form_is_section_offset (const struct attribute
*attr
)
25246 return (attr
->form
== DW_FORM_data4
25247 || attr
->form
== DW_FORM_data8
25248 || attr
->form
== DW_FORM_sec_offset
);
25251 /* Return non-zero if ATTR's value falls in the 'constant' class, or
25252 zero otherwise. When this function returns true, you can apply
25253 dwarf2_get_attr_constant_value to it.
25255 However, note that for some attributes you must check
25256 attr_form_is_section_offset before using this test. DW_FORM_data4
25257 and DW_FORM_data8 are members of both the constant class, and of
25258 the classes that contain offsets into other debug sections
25259 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
25260 that, if an attribute's can be either a constant or one of the
25261 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
25262 taken as section offsets, not constants.
25264 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
25265 cannot handle that. */
25268 attr_form_is_constant (const struct attribute
*attr
)
25270 switch (attr
->form
)
25272 case DW_FORM_sdata
:
25273 case DW_FORM_udata
:
25274 case DW_FORM_data1
:
25275 case DW_FORM_data2
:
25276 case DW_FORM_data4
:
25277 case DW_FORM_data8
:
25278 case DW_FORM_implicit_const
:
25286 /* DW_ADDR is always stored already as sect_offset; despite for the forms
25287 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
25290 attr_form_is_ref (const struct attribute
*attr
)
25292 switch (attr
->form
)
25294 case DW_FORM_ref_addr
:
25299 case DW_FORM_ref_udata
:
25300 case DW_FORM_GNU_ref_alt
:
25307 /* Return the .debug_loc section to use for CU.
25308 For DWO files use .debug_loc.dwo. */
25310 static struct dwarf2_section_info
*
25311 cu_debug_loc_section (struct dwarf2_cu
*cu
)
25313 struct dwarf2_per_objfile
*dwarf2_per_objfile
25314 = cu
->per_cu
->dwarf2_per_objfile
;
25318 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
25320 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
25322 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
25323 : &dwarf2_per_objfile
->loc
);
25326 /* A helper function that fills in a dwarf2_loclist_baton. */
25329 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
25330 struct dwarf2_loclist_baton
*baton
,
25331 const struct attribute
*attr
)
25333 struct dwarf2_per_objfile
*dwarf2_per_objfile
25334 = cu
->per_cu
->dwarf2_per_objfile
;
25335 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25337 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
25339 baton
->per_cu
= cu
->per_cu
;
25340 gdb_assert (baton
->per_cu
);
25341 /* We don't know how long the location list is, but make sure we
25342 don't run off the edge of the section. */
25343 baton
->size
= section
->size
- DW_UNSND (attr
);
25344 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
25345 baton
->base_address
= cu
->base_address
;
25346 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
25350 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
25351 struct dwarf2_cu
*cu
, int is_block
)
25353 struct dwarf2_per_objfile
*dwarf2_per_objfile
25354 = cu
->per_cu
->dwarf2_per_objfile
;
25355 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25356 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25358 if (attr_form_is_section_offset (attr
)
25359 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
25360 the section. If so, fall through to the complaint in the
25362 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
25364 struct dwarf2_loclist_baton
*baton
;
25366 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
25368 fill_in_loclist_baton (cu
, baton
, attr
);
25370 if (cu
->base_known
== 0)
25371 complaint (_("Location list used without "
25372 "specifying the CU base address."));
25374 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25375 ? dwarf2_loclist_block_index
25376 : dwarf2_loclist_index
);
25377 SYMBOL_LOCATION_BATON (sym
) = baton
;
25381 struct dwarf2_locexpr_baton
*baton
;
25383 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
25384 baton
->per_cu
= cu
->per_cu
;
25385 gdb_assert (baton
->per_cu
);
25387 if (attr_form_is_block (attr
))
25389 /* Note that we're just copying the block's data pointer
25390 here, not the actual data. We're still pointing into the
25391 info_buffer for SYM's objfile; right now we never release
25392 that buffer, but when we do clean up properly this may
25394 baton
->size
= DW_BLOCK (attr
)->size
;
25395 baton
->data
= DW_BLOCK (attr
)->data
;
25399 dwarf2_invalid_attrib_class_complaint ("location description",
25400 sym
->natural_name ());
25404 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25405 ? dwarf2_locexpr_block_index
25406 : dwarf2_locexpr_index
);
25407 SYMBOL_LOCATION_BATON (sym
) = baton
;
25411 /* Return the OBJFILE associated with the compilation unit CU. If CU
25412 came from a separate debuginfo file, then the master objfile is
25416 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
25418 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25420 /* Return the master objfile, so that we can report and look up the
25421 correct file containing this variable. */
25422 if (objfile
->separate_debug_objfile_backlink
)
25423 objfile
= objfile
->separate_debug_objfile_backlink
;
25428 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
25429 (CU_HEADERP is unused in such case) or prepare a temporary copy at
25430 CU_HEADERP first. */
25432 static const struct comp_unit_head
*
25433 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
25434 struct dwarf2_per_cu_data
*per_cu
)
25436 const gdb_byte
*info_ptr
;
25439 return &per_cu
->cu
->header
;
25441 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
25443 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
25444 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
25445 rcuh_kind::COMPILE
);
25450 /* Return the address size given in the compilation unit header for CU. */
25453 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25455 struct comp_unit_head cu_header_local
;
25456 const struct comp_unit_head
*cu_headerp
;
25458 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25460 return cu_headerp
->addr_size
;
25463 /* Return the offset size given in the compilation unit header for CU. */
25466 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
25468 struct comp_unit_head cu_header_local
;
25469 const struct comp_unit_head
*cu_headerp
;
25471 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25473 return cu_headerp
->offset_size
;
25476 /* See its dwarf2loc.h declaration. */
25479 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25481 struct comp_unit_head cu_header_local
;
25482 const struct comp_unit_head
*cu_headerp
;
25484 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25486 if (cu_headerp
->version
== 2)
25487 return cu_headerp
->addr_size
;
25489 return cu_headerp
->offset_size
;
25492 /* Return the text offset of the CU. The returned offset comes from
25493 this CU's objfile. If this objfile came from a separate debuginfo
25494 file, then the offset may be different from the corresponding
25495 offset in the parent objfile. */
25498 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25500 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25502 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25505 /* Return a type that is a generic pointer type, the size of which matches
25506 the address size given in the compilation unit header for PER_CU. */
25507 static struct type
*
25508 dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
)
25510 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25511 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
25512 struct type
*addr_type
= lookup_pointer_type (void_type
);
25513 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
25515 if (TYPE_LENGTH (addr_type
) == addr_size
)
25519 = dwarf2_per_cu_addr_sized_int_type (per_cu
, TYPE_UNSIGNED (addr_type
));
25523 /* Return DWARF version number of PER_CU. */
25526 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25528 return per_cu
->dwarf_version
;
25531 /* Locate the .debug_info compilation unit from CU's objfile which contains
25532 the DIE at OFFSET. Raises an error on failure. */
25534 static struct dwarf2_per_cu_data
*
25535 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25536 unsigned int offset_in_dwz
,
25537 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25539 struct dwarf2_per_cu_data
*this_cu
;
25543 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
25546 struct dwarf2_per_cu_data
*mid_cu
;
25547 int mid
= low
+ (high
- low
) / 2;
25549 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25550 if (mid_cu
->is_dwz
> offset_in_dwz
25551 || (mid_cu
->is_dwz
== offset_in_dwz
25552 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
25557 gdb_assert (low
== high
);
25558 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25559 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
25561 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25562 error (_("Dwarf Error: could not find partial DIE containing "
25563 "offset %s [in module %s]"),
25564 sect_offset_str (sect_off
),
25565 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25567 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25569 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25573 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25574 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25575 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25576 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25581 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25583 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25584 : per_cu (per_cu_
),
25586 has_loclist (false),
25587 checked_producer (false),
25588 producer_is_gxx_lt_4_6 (false),
25589 producer_is_gcc_lt_4_3 (false),
25590 producer_is_icc (false),
25591 producer_is_icc_lt_14 (false),
25592 producer_is_codewarrior (false),
25593 processing_has_namespace_info (false)
25598 /* Destroy a dwarf2_cu. */
25600 dwarf2_cu::~dwarf2_cu ()
25605 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25608 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25609 enum language pretend_language
)
25611 struct attribute
*attr
;
25613 /* Set the language we're debugging. */
25614 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25615 if (attr
!= nullptr)
25616 set_cu_language (DW_UNSND (attr
), cu
);
25619 cu
->language
= pretend_language
;
25620 cu
->language_defn
= language_def (cu
->language
);
25623 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25626 /* Increase the age counter on each cached compilation unit, and free
25627 any that are too old. */
25630 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25632 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25634 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25635 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25636 while (per_cu
!= NULL
)
25638 per_cu
->cu
->last_used
++;
25639 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25640 dwarf2_mark (per_cu
->cu
);
25641 per_cu
= per_cu
->cu
->read_in_chain
;
25644 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25645 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25646 while (per_cu
!= NULL
)
25648 struct dwarf2_per_cu_data
*next_cu
;
25650 next_cu
= per_cu
->cu
->read_in_chain
;
25652 if (!per_cu
->cu
->mark
)
25655 *last_chain
= next_cu
;
25658 last_chain
= &per_cu
->cu
->read_in_chain
;
25664 /* Remove a single compilation unit from the cache. */
25667 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25669 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25670 struct dwarf2_per_objfile
*dwarf2_per_objfile
25671 = target_per_cu
->dwarf2_per_objfile
;
25673 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25674 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25675 while (per_cu
!= NULL
)
25677 struct dwarf2_per_cu_data
*next_cu
;
25679 next_cu
= per_cu
->cu
->read_in_chain
;
25681 if (per_cu
== target_per_cu
)
25685 *last_chain
= next_cu
;
25689 last_chain
= &per_cu
->cu
->read_in_chain
;
25695 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25696 We store these in a hash table separate from the DIEs, and preserve them
25697 when the DIEs are flushed out of cache.
25699 The CU "per_cu" pointer is needed because offset alone is not enough to
25700 uniquely identify the type. A file may have multiple .debug_types sections,
25701 or the type may come from a DWO file. Furthermore, while it's more logical
25702 to use per_cu->section+offset, with Fission the section with the data is in
25703 the DWO file but we don't know that section at the point we need it.
25704 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25705 because we can enter the lookup routine, get_die_type_at_offset, from
25706 outside this file, and thus won't necessarily have PER_CU->cu.
25707 Fortunately, PER_CU is stable for the life of the objfile. */
25709 struct dwarf2_per_cu_offset_and_type
25711 const struct dwarf2_per_cu_data
*per_cu
;
25712 sect_offset sect_off
;
25716 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25719 per_cu_offset_and_type_hash (const void *item
)
25721 const struct dwarf2_per_cu_offset_and_type
*ofs
25722 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25724 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25727 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25730 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25732 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25733 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25734 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25735 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25737 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25738 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25741 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25742 table if necessary. For convenience, return TYPE.
25744 The DIEs reading must have careful ordering to:
25745 * Not cause infinite loops trying to read in DIEs as a prerequisite for
25746 reading current DIE.
25747 * Not trying to dereference contents of still incompletely read in types
25748 while reading in other DIEs.
25749 * Enable referencing still incompletely read in types just by a pointer to
25750 the type without accessing its fields.
25752 Therefore caller should follow these rules:
25753 * Try to fetch any prerequisite types we may need to build this DIE type
25754 before building the type and calling set_die_type.
25755 * After building type call set_die_type for current DIE as soon as
25756 possible before fetching more types to complete the current type.
25757 * Make the type as complete as possible before fetching more types. */
25759 static struct type
*
25760 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25762 struct dwarf2_per_objfile
*dwarf2_per_objfile
25763 = cu
->per_cu
->dwarf2_per_objfile
;
25764 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25765 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25766 struct attribute
*attr
;
25767 struct dynamic_prop prop
;
25769 /* For Ada types, make sure that the gnat-specific data is always
25770 initialized (if not already set). There are a few types where
25771 we should not be doing so, because the type-specific area is
25772 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25773 where the type-specific area is used to store the floatformat).
25774 But this is not a problem, because the gnat-specific information
25775 is actually not needed for these types. */
25776 if (need_gnat_info (cu
)
25777 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25778 && TYPE_CODE (type
) != TYPE_CODE_FLT
25779 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25780 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25781 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25782 && !HAVE_GNAT_AUX_INFO (type
))
25783 INIT_GNAT_SPECIFIC (type
);
25785 /* Read DW_AT_allocated and set in type. */
25786 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25787 if (attr_form_is_block (attr
))
25789 struct type
*prop_type
25790 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25791 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25792 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25794 else if (attr
!= NULL
)
25796 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25797 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25798 sect_offset_str (die
->sect_off
));
25801 /* Read DW_AT_associated and set in type. */
25802 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25803 if (attr_form_is_block (attr
))
25805 struct type
*prop_type
25806 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25807 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25808 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25810 else if (attr
!= NULL
)
25812 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25813 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25814 sect_offset_str (die
->sect_off
));
25817 /* Read DW_AT_data_location and set in type. */
25818 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25819 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
25820 dwarf2_per_cu_addr_type (cu
->per_cu
)))
25821 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25823 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25825 dwarf2_per_objfile
->die_type_hash
=
25826 htab_create_alloc_ex (127,
25827 per_cu_offset_and_type_hash
,
25828 per_cu_offset_and_type_eq
,
25830 &objfile
->objfile_obstack
,
25831 hashtab_obstack_allocate
,
25832 dummy_obstack_deallocate
);
25835 ofs
.per_cu
= cu
->per_cu
;
25836 ofs
.sect_off
= die
->sect_off
;
25838 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25839 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25841 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25842 sect_offset_str (die
->sect_off
));
25843 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25844 struct dwarf2_per_cu_offset_and_type
);
25849 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25850 or return NULL if the die does not have a saved type. */
25852 static struct type
*
25853 get_die_type_at_offset (sect_offset sect_off
,
25854 struct dwarf2_per_cu_data
*per_cu
)
25856 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25857 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25859 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25862 ofs
.per_cu
= per_cu
;
25863 ofs
.sect_off
= sect_off
;
25864 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25865 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25872 /* Look up the type for DIE in CU in die_type_hash,
25873 or return NULL if DIE does not have a saved type. */
25875 static struct type
*
25876 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25878 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25881 /* Add a dependence relationship from CU to REF_PER_CU. */
25884 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25885 struct dwarf2_per_cu_data
*ref_per_cu
)
25889 if (cu
->dependencies
== NULL
)
25891 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25892 NULL
, &cu
->comp_unit_obstack
,
25893 hashtab_obstack_allocate
,
25894 dummy_obstack_deallocate
);
25896 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25898 *slot
= ref_per_cu
;
25901 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25902 Set the mark field in every compilation unit in the
25903 cache that we must keep because we are keeping CU. */
25906 dwarf2_mark_helper (void **slot
, void *data
)
25908 struct dwarf2_per_cu_data
*per_cu
;
25910 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25912 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25913 reading of the chain. As such dependencies remain valid it is not much
25914 useful to track and undo them during QUIT cleanups. */
25915 if (per_cu
->cu
== NULL
)
25918 if (per_cu
->cu
->mark
)
25920 per_cu
->cu
->mark
= true;
25922 if (per_cu
->cu
->dependencies
!= NULL
)
25923 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25928 /* Set the mark field in CU and in every other compilation unit in the
25929 cache that we must keep because we are keeping CU. */
25932 dwarf2_mark (struct dwarf2_cu
*cu
)
25937 if (cu
->dependencies
!= NULL
)
25938 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25942 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25946 per_cu
->cu
->mark
= false;
25947 per_cu
= per_cu
->cu
->read_in_chain
;
25951 /* Trivial hash function for partial_die_info: the hash value of a DIE
25952 is its offset in .debug_info for this objfile. */
25955 partial_die_hash (const void *item
)
25957 const struct partial_die_info
*part_die
25958 = (const struct partial_die_info
*) item
;
25960 return to_underlying (part_die
->sect_off
);
25963 /* Trivial comparison function for partial_die_info structures: two DIEs
25964 are equal if they have the same offset. */
25967 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25969 const struct partial_die_info
*part_die_lhs
25970 = (const struct partial_die_info
*) item_lhs
;
25971 const struct partial_die_info
*part_die_rhs
25972 = (const struct partial_die_info
*) item_rhs
;
25974 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25977 struct cmd_list_element
*set_dwarf_cmdlist
;
25978 struct cmd_list_element
*show_dwarf_cmdlist
;
25981 set_dwarf_cmd (const char *args
, int from_tty
)
25983 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25988 show_dwarf_cmd (const char *args
, int from_tty
)
25990 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25993 bool dwarf_always_disassemble
;
25996 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25997 struct cmd_list_element
*c
, const char *value
)
25999 fprintf_filtered (file
,
26000 _("Whether to always disassemble "
26001 "DWARF expressions is %s.\n"),
26006 show_check_physname (struct ui_file
*file
, int from_tty
,
26007 struct cmd_list_element
*c
, const char *value
)
26009 fprintf_filtered (file
,
26010 _("Whether to check \"physname\" is %s.\n"),
26015 _initialize_dwarf2_read (void)
26017 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
26018 Set DWARF specific variables.\n\
26019 Configure DWARF variables such as the cache size."),
26020 &set_dwarf_cmdlist
, "maintenance set dwarf ",
26021 0/*allow-unknown*/, &maintenance_set_cmdlist
);
26023 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
26024 Show DWARF specific variables.\n\
26025 Show DWARF variables such as the cache size."),
26026 &show_dwarf_cmdlist
, "maintenance show dwarf ",
26027 0/*allow-unknown*/, &maintenance_show_cmdlist
);
26029 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
26030 &dwarf_max_cache_age
, _("\
26031 Set the upper bound on the age of cached DWARF compilation units."), _("\
26032 Show the upper bound on the age of cached DWARF compilation units."), _("\
26033 A higher limit means that cached compilation units will be stored\n\
26034 in memory longer, and more total memory will be used. Zero disables\n\
26035 caching, which can slow down startup."),
26037 show_dwarf_max_cache_age
,
26038 &set_dwarf_cmdlist
,
26039 &show_dwarf_cmdlist
);
26041 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
26042 &dwarf_always_disassemble
, _("\
26043 Set whether `info address' always disassembles DWARF expressions."), _("\
26044 Show whether `info address' always disassembles DWARF expressions."), _("\
26045 When enabled, DWARF expressions are always printed in an assembly-like\n\
26046 syntax. When disabled, expressions will be printed in a more\n\
26047 conversational style, when possible."),
26049 show_dwarf_always_disassemble
,
26050 &set_dwarf_cmdlist
,
26051 &show_dwarf_cmdlist
);
26053 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
26054 Set debugging of the DWARF reader."), _("\
26055 Show debugging of the DWARF reader."), _("\
26056 When enabled (non-zero), debugging messages are printed during DWARF\n\
26057 reading and symtab expansion. A value of 1 (one) provides basic\n\
26058 information. A value greater than 1 provides more verbose information."),
26061 &setdebuglist
, &showdebuglist
);
26063 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
26064 Set debugging of the DWARF DIE reader."), _("\
26065 Show debugging of the DWARF DIE reader."), _("\
26066 When enabled (non-zero), DIEs are dumped after they are read in.\n\
26067 The value is the maximum depth to print."),
26070 &setdebuglist
, &showdebuglist
);
26072 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
26073 Set debugging of the dwarf line reader."), _("\
26074 Show debugging of the dwarf line reader."), _("\
26075 When enabled (non-zero), line number entries are dumped as they are read in.\n\
26076 A value of 1 (one) provides basic information.\n\
26077 A value greater than 1 provides more verbose information."),
26080 &setdebuglist
, &showdebuglist
);
26082 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
26083 Set cross-checking of \"physname\" code against demangler."), _("\
26084 Show cross-checking of \"physname\" code against demangler."), _("\
26085 When enabled, GDB's internal \"physname\" code is checked against\n\
26087 NULL
, show_check_physname
,
26088 &setdebuglist
, &showdebuglist
);
26090 add_setshow_boolean_cmd ("use-deprecated-index-sections",
26091 no_class
, &use_deprecated_index_sections
, _("\
26092 Set whether to use deprecated gdb_index sections."), _("\
26093 Show whether to use deprecated gdb_index sections."), _("\
26094 When enabled, deprecated .gdb_index sections are used anyway.\n\
26095 Normally they are ignored either because of a missing feature or\n\
26096 performance issue.\n\
26097 Warning: This option must be enabled before gdb reads the file."),
26100 &setlist
, &showlist
);
26102 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
26103 &dwarf2_locexpr_funcs
);
26104 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
26105 &dwarf2_loclist_funcs
);
26107 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
26108 &dwarf2_block_frame_base_locexpr_funcs
);
26109 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
26110 &dwarf2_block_frame_base_loclist_funcs
);
26113 selftests::register_test ("dw2_expand_symtabs_matching",
26114 selftests::dw2_expand_symtabs_matching::run_test
);