1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2020 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 "dwarf2/read.h"
33 #include "dwarf2/abbrev.h"
34 #include "dwarf2/attribute.h"
35 #include "dwarf2/index-cache.h"
36 #include "dwarf2/index-common.h"
37 #include "dwarf2/leb.h"
46 #include "gdb-demangle.h"
47 #include "filenames.h" /* for DOSish file names */
50 #include "complaints.h"
51 #include "dwarf2/expr.h"
52 #include "dwarf2/loc.h"
53 #include "cp-support.h"
59 #include "typeprint.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
70 #include "namespace.h"
71 #include "gdbsupport/function-view.h"
72 #include "gdbsupport/gdb_optional.h"
73 #include "gdbsupport/underlying.h"
74 #include "gdbsupport/hash_enum.h"
75 #include "filename-seen-cache.h"
79 #include <unordered_map>
80 #include "gdbsupport/selftest.h"
81 #include "rust-lang.h"
82 #include "gdbsupport/pathstuff.h"
84 /* When == 1, print basic high level tracing messages.
85 When > 1, be more verbose.
86 This is in contrast to the low level DIE reading of dwarf_die_debug. */
87 static unsigned int dwarf_read_debug
= 0;
89 /* When non-zero, dump DIEs after they are read in. */
90 static unsigned int dwarf_die_debug
= 0;
92 /* When non-zero, dump line number entries as they are read in. */
93 static unsigned int dwarf_line_debug
= 0;
95 /* When true, cross-check physname against demangler. */
96 static bool check_physname
= false;
98 /* When true, do not reject deprecated .gdb_index sections. */
99 static bool use_deprecated_index_sections
= false;
101 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
103 /* The "aclass" indices for various kinds of computed DWARF symbols. */
105 static int dwarf2_locexpr_index
;
106 static int dwarf2_loclist_index
;
107 static int dwarf2_locexpr_block_index
;
108 static int dwarf2_loclist_block_index
;
110 /* An index into a (C++) symbol name component in a symbol name as
111 recorded in the mapped_index's symbol table. For each C++ symbol
112 in the symbol table, we record one entry for the start of each
113 component in the symbol in a table of name components, and then
114 sort the table, in order to be able to binary search symbol names,
115 ignoring leading namespaces, both completion and regular look up.
116 For example, for symbol "A::B::C", we'll have an entry that points
117 to "A::B::C", another that points to "B::C", and another for "C".
118 Note that function symbols in GDB index have no parameter
119 information, just the function/method names. You can convert a
120 name_component to a "const char *" using the
121 'mapped_index::symbol_name_at(offset_type)' method. */
123 struct name_component
125 /* Offset in the symbol name where the component starts. Stored as
126 a (32-bit) offset instead of a pointer to save memory and improve
127 locality on 64-bit architectures. */
128 offset_type name_offset
;
130 /* The symbol's index in the symbol and constant pool tables of a
135 /* Base class containing bits shared by both .gdb_index and
136 .debug_name indexes. */
138 struct mapped_index_base
140 mapped_index_base () = default;
141 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
143 /* The name_component table (a sorted vector). See name_component's
144 description above. */
145 std::vector
<name_component
> name_components
;
147 /* How NAME_COMPONENTS is sorted. */
148 enum case_sensitivity name_components_casing
;
150 /* Return the number of names in the symbol table. */
151 virtual size_t symbol_name_count () const = 0;
153 /* Get the name of the symbol at IDX in the symbol table. */
154 virtual const char *symbol_name_at (offset_type idx
) const = 0;
156 /* Return whether the name at IDX in the symbol table should be
158 virtual bool symbol_name_slot_invalid (offset_type idx
) const
163 /* Build the symbol name component sorted vector, if we haven't
165 void build_name_components ();
167 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
168 possible matches for LN_NO_PARAMS in the name component
170 std::pair
<std::vector
<name_component
>::const_iterator
,
171 std::vector
<name_component
>::const_iterator
>
172 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
173 enum language lang
) const;
175 /* Prevent deleting/destroying via a base class pointer. */
177 ~mapped_index_base() = default;
180 /* A description of the mapped index. The file format is described in
181 a comment by the code that writes the index. */
182 struct mapped_index final
: public mapped_index_base
184 /* A slot/bucket in the symbol table hash. */
185 struct symbol_table_slot
187 const offset_type name
;
188 const offset_type vec
;
191 /* Index data format version. */
194 /* The address table data. */
195 gdb::array_view
<const gdb_byte
> address_table
;
197 /* The symbol table, implemented as a hash table. */
198 gdb::array_view
<symbol_table_slot
> symbol_table
;
200 /* A pointer to the constant pool. */
201 const char *constant_pool
= nullptr;
203 bool symbol_name_slot_invalid (offset_type idx
) const override
205 const auto &bucket
= this->symbol_table
[idx
];
206 return bucket
.name
== 0 && bucket
.vec
== 0;
209 /* Convenience method to get at the name of the symbol at IDX in the
211 const char *symbol_name_at (offset_type idx
) const override
212 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
214 size_t symbol_name_count () const override
215 { return this->symbol_table
.size (); }
218 /* A description of the mapped .debug_names.
219 Uninitialized map has CU_COUNT 0. */
220 struct mapped_debug_names final
: public mapped_index_base
222 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
223 : dwarf2_per_objfile (dwarf2_per_objfile_
)
226 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
227 bfd_endian dwarf5_byte_order
;
228 bool dwarf5_is_dwarf64
;
229 bool augmentation_is_gdb
;
231 uint32_t cu_count
= 0;
232 uint32_t tu_count
, bucket_count
, name_count
;
233 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
234 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
235 const gdb_byte
*name_table_string_offs_reordered
;
236 const gdb_byte
*name_table_entry_offs_reordered
;
237 const gdb_byte
*entry_pool
;
244 /* Attribute name DW_IDX_*. */
247 /* Attribute form DW_FORM_*. */
250 /* Value if FORM is DW_FORM_implicit_const. */
251 LONGEST implicit_const
;
253 std::vector
<attr
> attr_vec
;
256 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
258 const char *namei_to_name (uint32_t namei
) const;
260 /* Implementation of the mapped_index_base virtual interface, for
261 the name_components cache. */
263 const char *symbol_name_at (offset_type idx
) const override
264 { return namei_to_name (idx
); }
266 size_t symbol_name_count () const override
267 { return this->name_count
; }
270 /* See dwarf2read.h. */
273 get_dwarf2_per_objfile (struct objfile
*objfile
)
275 return dwarf2_objfile_data_key
.get (objfile
);
278 /* Default names of the debugging sections. */
280 /* Note that if the debugging section has been compressed, it might
281 have a name like .zdebug_info. */
283 static const struct dwarf2_debug_sections dwarf2_elf_names
=
285 { ".debug_info", ".zdebug_info" },
286 { ".debug_abbrev", ".zdebug_abbrev" },
287 { ".debug_line", ".zdebug_line" },
288 { ".debug_loc", ".zdebug_loc" },
289 { ".debug_loclists", ".zdebug_loclists" },
290 { ".debug_macinfo", ".zdebug_macinfo" },
291 { ".debug_macro", ".zdebug_macro" },
292 { ".debug_str", ".zdebug_str" },
293 { ".debug_str_offsets", ".zdebug_str_offsets" },
294 { ".debug_line_str", ".zdebug_line_str" },
295 { ".debug_ranges", ".zdebug_ranges" },
296 { ".debug_rnglists", ".zdebug_rnglists" },
297 { ".debug_types", ".zdebug_types" },
298 { ".debug_addr", ".zdebug_addr" },
299 { ".debug_frame", ".zdebug_frame" },
300 { ".eh_frame", NULL
},
301 { ".gdb_index", ".zgdb_index" },
302 { ".debug_names", ".zdebug_names" },
303 { ".debug_aranges", ".zdebug_aranges" },
307 /* List of DWO/DWP sections. */
309 static const struct dwop_section_names
311 struct dwarf2_section_names abbrev_dwo
;
312 struct dwarf2_section_names info_dwo
;
313 struct dwarf2_section_names line_dwo
;
314 struct dwarf2_section_names loc_dwo
;
315 struct dwarf2_section_names loclists_dwo
;
316 struct dwarf2_section_names macinfo_dwo
;
317 struct dwarf2_section_names macro_dwo
;
318 struct dwarf2_section_names str_dwo
;
319 struct dwarf2_section_names str_offsets_dwo
;
320 struct dwarf2_section_names types_dwo
;
321 struct dwarf2_section_names cu_index
;
322 struct dwarf2_section_names tu_index
;
326 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
327 { ".debug_info.dwo", ".zdebug_info.dwo" },
328 { ".debug_line.dwo", ".zdebug_line.dwo" },
329 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
330 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
331 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
332 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
333 { ".debug_str.dwo", ".zdebug_str.dwo" },
334 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
335 { ".debug_types.dwo", ".zdebug_types.dwo" },
336 { ".debug_cu_index", ".zdebug_cu_index" },
337 { ".debug_tu_index", ".zdebug_tu_index" },
340 /* local data types */
342 /* The data in a compilation unit header, after target2host
343 translation, looks like this. */
344 struct comp_unit_head
348 unsigned char addr_size
;
349 unsigned char signed_addr_p
;
350 sect_offset abbrev_sect_off
;
352 /* Size of file offsets; either 4 or 8. */
353 unsigned int offset_size
;
355 /* Size of the length field; either 4 or 12. */
356 unsigned int initial_length_size
;
358 enum dwarf_unit_type unit_type
;
360 /* Offset to the first byte of this compilation unit header in the
361 .debug_info section, for resolving relative reference dies. */
362 sect_offset sect_off
;
364 /* Offset to first die in this cu from the start of the cu.
365 This will be the first byte following the compilation unit header. */
366 cu_offset first_die_cu_offset
;
369 /* 64-bit signature of this unit. For type units, it denotes the signature of
370 the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5).
371 Also used in DWARF 5, to denote the dwo id when the unit type is
372 DW_UT_skeleton or DW_UT_split_compile. */
375 /* For types, offset in the type's DIE of the type defined by this TU. */
376 cu_offset type_cu_offset_in_tu
;
379 /* Type used for delaying computation of method physnames.
380 See comments for compute_delayed_physnames. */
381 struct delayed_method_info
383 /* The type to which the method is attached, i.e., its parent class. */
386 /* The index of the method in the type's function fieldlists. */
389 /* The index of the method in the fieldlist. */
392 /* The name of the DIE. */
395 /* The DIE associated with this method. */
396 struct die_info
*die
;
399 /* Internal state when decoding a particular compilation unit. */
402 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
405 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
407 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
408 Create the set of symtabs used by this TU, or if this TU is sharing
409 symtabs with another TU and the symtabs have already been created
410 then restore those symtabs in the line header.
411 We don't need the pc/line-number mapping for type units. */
412 void setup_type_unit_groups (struct die_info
*die
);
414 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
415 buildsym_compunit constructor. */
416 struct compunit_symtab
*start_symtab (const char *name
,
417 const char *comp_dir
,
420 /* Reset the builder. */
421 void reset_builder () { m_builder
.reset (); }
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
= 0;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
= language_unknown
;
434 const struct language_defn
*language_defn
= nullptr;
436 const char *producer
= nullptr;
439 /* The symtab builder for this CU. This is only non-NULL when full
440 symbols are being read. */
441 std::unique_ptr
<buildsym_compunit
> m_builder
;
444 /* The generic symbol table building routines have separate lists for
445 file scope symbols and all all other scopes (local scopes). So
446 we need to select the right one to pass to add_symbol_to_list().
447 We do it by keeping a pointer to the correct list in list_in_scope.
449 FIXME: The original dwarf code just treated the file scope as the
450 first local scope, and all other local scopes as nested local
451 scopes, and worked fine. Check to see if we really need to
452 distinguish these in buildsym.c. */
453 struct pending
**list_in_scope
= nullptr;
455 /* Hash table holding all the loaded partial DIEs
456 with partial_die->offset.SECT_OFF as hash. */
457 htab_t partial_dies
= nullptr;
459 /* Storage for things with the same lifetime as this read-in compilation
460 unit, including partial DIEs. */
461 auto_obstack comp_unit_obstack
;
463 /* When multiple dwarf2_cu structures are living in memory, this field
464 chains them all together, so that they can be released efficiently.
465 We will probably also want a generation counter so that most-recently-used
466 compilation units are cached... */
467 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
469 /* Backlink to our per_cu entry. */
470 struct dwarf2_per_cu_data
*per_cu
;
472 /* How many compilation units ago was this CU last referenced? */
475 /* A hash table of DIE cu_offset for following references with
476 die_info->offset.sect_off as hash. */
477 htab_t die_hash
= nullptr;
479 /* Full DIEs if read in. */
480 struct die_info
*dies
= nullptr;
482 /* A set of pointers to dwarf2_per_cu_data objects for compilation
483 units referenced by this one. Only set during full symbol processing;
484 partial symbol tables do not have dependencies. */
485 htab_t dependencies
= nullptr;
487 /* Header data from the line table, during full symbol processing. */
488 struct line_header
*line_header
= nullptr;
489 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
490 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
491 this is the DW_TAG_compile_unit die for this CU. We'll hold on
492 to the line header as long as this DIE is being processed. See
493 process_die_scope. */
494 die_info
*line_header_die_owner
= nullptr;
496 /* A list of methods which need to have physnames computed
497 after all type information has been read. */
498 std::vector
<delayed_method_info
> method_list
;
500 /* To be copied to symtab->call_site_htab. */
501 htab_t call_site_htab
= nullptr;
503 /* Non-NULL if this CU came from a DWO file.
504 There is an invariant here that is important to remember:
505 Except for attributes copied from the top level DIE in the "main"
506 (or "stub") file in preparation for reading the DWO file
507 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
508 Either there isn't a DWO file (in which case this is NULL and the point
509 is moot), or there is and either we're not going to read it (in which
510 case this is NULL) or there is and we are reading it (in which case this
512 struct dwo_unit
*dwo_unit
= nullptr;
514 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
515 Note this value comes from the Fission stub CU/TU's DIE. */
516 gdb::optional
<ULONGEST
> addr_base
;
518 /* The DW_AT_rnglists_base attribute if present.
519 Note this value comes from the Fission stub CU/TU's DIE.
520 Also note that the value is zero in the non-DWO case so this value can
521 be used without needing to know whether DWO files are in use or not.
522 N.B. This does not apply to DW_AT_ranges appearing in
523 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
524 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
525 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
526 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
527 ULONGEST ranges_base
= 0;
529 /* When reading debug info generated by older versions of rustc, we
530 have to rewrite some union types to be struct types with a
531 variant part. This rewriting must be done after the CU is fully
532 read in, because otherwise at the point of rewriting some struct
533 type might not have been fully processed. So, we keep a list of
534 all such types here and process them after expansion. */
535 std::vector
<struct type
*> rust_unions
;
537 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
538 files, the value is implicitly zero. For DWARF 5 version DWO files, the
539 value is often implicit and is the size of the header of
540 .debug_str_offsets section (8 or 4, depending on the address size). */
541 gdb::optional
<ULONGEST
> str_offsets_base
;
543 /* Mark used when releasing cached dies. */
546 /* This CU references .debug_loc. See the symtab->locations_valid field.
547 This test is imperfect as there may exist optimized debug code not using
548 any location list and still facing inlining issues if handled as
549 unoptimized code. For a future better test see GCC PR other/32998. */
550 bool has_loclist
: 1;
552 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
553 if all the producer_is_* fields are valid. This information is cached
554 because profiling CU expansion showed excessive time spent in
555 producer_is_gxx_lt_4_6. */
556 bool checked_producer
: 1;
557 bool producer_is_gxx_lt_4_6
: 1;
558 bool producer_is_gcc_lt_4_3
: 1;
559 bool producer_is_icc
: 1;
560 bool producer_is_icc_lt_14
: 1;
561 bool producer_is_codewarrior
: 1;
563 /* When true, the file that we're processing is known to have
564 debugging info for C++ namespaces. GCC 3.3.x did not produce
565 this information, but later versions do. */
567 bool processing_has_namespace_info
: 1;
569 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
571 /* If this CU was inherited by another CU (via specification,
572 abstract_origin, etc), this is the ancestor CU. */
575 /* Get the buildsym_compunit for this CU. */
576 buildsym_compunit
*get_builder ()
578 /* If this CU has a builder associated with it, use that. */
579 if (m_builder
!= nullptr)
580 return m_builder
.get ();
582 /* Otherwise, search ancestors for a valid builder. */
583 if (ancestor
!= nullptr)
584 return ancestor
->get_builder ();
590 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
591 This includes type_unit_group and quick_file_names. */
593 struct stmt_list_hash
595 /* The DWO unit this table is from or NULL if there is none. */
596 struct dwo_unit
*dwo_unit
;
598 /* Offset in .debug_line or .debug_line.dwo. */
599 sect_offset line_sect_off
;
602 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
603 an object of this type. */
605 struct type_unit_group
607 /* dwarf2read.c's main "handle" on a TU symtab.
608 To simplify things we create an artificial CU that "includes" all the
609 type units using this stmt_list so that the rest of the code still has
610 a "per_cu" handle on the symtab.
611 This PER_CU is recognized by having no section. */
612 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
613 struct dwarf2_per_cu_data per_cu
;
615 /* The TUs that share this DW_AT_stmt_list entry.
616 This is added to while parsing type units to build partial symtabs,
617 and is deleted afterwards and not used again. */
618 std::vector
<signatured_type
*> *tus
;
620 /* The compunit symtab.
621 Type units in a group needn't all be defined in the same source file,
622 so we create an essentially anonymous symtab as the compunit symtab. */
623 struct compunit_symtab
*compunit_symtab
;
625 /* The data used to construct the hash key. */
626 struct stmt_list_hash hash
;
628 /* The number of symtabs from the line header.
629 The value here must match line_header.num_file_names. */
630 unsigned int num_symtabs
;
632 /* The symbol tables for this TU (obtained from the files listed in
634 WARNING: The order of entries here must match the order of entries
635 in the line header. After the first TU using this type_unit_group, the
636 line header for the subsequent TUs is recreated from this. This is done
637 because we need to use the same symtabs for each TU using the same
638 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
639 there's no guarantee the line header doesn't have duplicate entries. */
640 struct symtab
**symtabs
;
643 /* These sections are what may appear in a (real or virtual) DWO file. */
647 struct dwarf2_section_info abbrev
;
648 struct dwarf2_section_info line
;
649 struct dwarf2_section_info loc
;
650 struct dwarf2_section_info loclists
;
651 struct dwarf2_section_info macinfo
;
652 struct dwarf2_section_info macro
;
653 struct dwarf2_section_info str
;
654 struct dwarf2_section_info str_offsets
;
655 /* In the case of a virtual DWO file, these two are unused. */
656 struct dwarf2_section_info info
;
657 std::vector
<dwarf2_section_info
> types
;
660 /* CUs/TUs in DWP/DWO files. */
664 /* Backlink to the containing struct dwo_file. */
665 struct dwo_file
*dwo_file
;
667 /* The "id" that distinguishes this CU/TU.
668 .debug_info calls this "dwo_id", .debug_types calls this "signature".
669 Since signatures came first, we stick with it for consistency. */
672 /* The section this CU/TU lives in, in the DWO file. */
673 struct dwarf2_section_info
*section
;
675 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
676 sect_offset sect_off
;
679 /* For types, offset in the type's DIE of the type defined by this TU. */
680 cu_offset type_offset_in_tu
;
683 /* include/dwarf2.h defines the DWP section codes.
684 It defines a max value but it doesn't define a min value, which we
685 use for error checking, so provide one. */
687 enum dwp_v2_section_ids
692 /* Data for one DWO file.
694 This includes virtual DWO files (a virtual DWO file is a DWO file as it
695 appears in a DWP file). DWP files don't really have DWO files per se -
696 comdat folding of types "loses" the DWO file they came from, and from
697 a high level view DWP files appear to contain a mass of random types.
698 However, to maintain consistency with the non-DWP case we pretend DWP
699 files contain virtual DWO files, and we assign each TU with one virtual
700 DWO file (generally based on the line and abbrev section offsets -
701 a heuristic that seems to work in practice). */
705 dwo_file () = default;
706 DISABLE_COPY_AND_ASSIGN (dwo_file
);
708 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
709 For virtual DWO files the name is constructed from the section offsets
710 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
711 from related CU+TUs. */
712 const char *dwo_name
= nullptr;
714 /* The DW_AT_comp_dir attribute. */
715 const char *comp_dir
= nullptr;
717 /* The bfd, when the file is open. Otherwise this is NULL.
718 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
719 gdb_bfd_ref_ptr dbfd
;
721 /* The sections that make up this DWO file.
722 Remember that for virtual DWO files in DWP V2, these are virtual
723 sections (for lack of a better name). */
724 struct dwo_sections sections
{};
726 /* The CUs in the file.
727 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
728 an extension to handle LLVM's Link Time Optimization output (where
729 multiple source files may be compiled into a single object/dwo pair). */
732 /* Table of TUs in the file.
733 Each element is a struct dwo_unit. */
737 /* These sections are what may appear in a DWP file. */
741 /* These are used by both DWP version 1 and 2. */
742 struct dwarf2_section_info str
;
743 struct dwarf2_section_info cu_index
;
744 struct dwarf2_section_info tu_index
;
746 /* These are only used by DWP version 2 files.
747 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
748 sections are referenced by section number, and are not recorded here.
749 In DWP version 2 there is at most one copy of all these sections, each
750 section being (effectively) comprised of the concatenation of all of the
751 individual sections that exist in the version 1 format.
752 To keep the code simple we treat each of these concatenated pieces as a
753 section itself (a virtual section?). */
754 struct dwarf2_section_info abbrev
;
755 struct dwarf2_section_info info
;
756 struct dwarf2_section_info line
;
757 struct dwarf2_section_info loc
;
758 struct dwarf2_section_info macinfo
;
759 struct dwarf2_section_info macro
;
760 struct dwarf2_section_info str_offsets
;
761 struct dwarf2_section_info types
;
764 /* These sections are what may appear in a virtual DWO file in DWP version 1.
765 A virtual DWO file is a DWO file as it appears in a DWP file. */
767 struct virtual_v1_dwo_sections
769 struct dwarf2_section_info abbrev
;
770 struct dwarf2_section_info line
;
771 struct dwarf2_section_info loc
;
772 struct dwarf2_section_info macinfo
;
773 struct dwarf2_section_info macro
;
774 struct dwarf2_section_info str_offsets
;
775 /* Each DWP hash table entry records one CU or one TU.
776 That is recorded here, and copied to dwo_unit.section. */
777 struct dwarf2_section_info info_or_types
;
780 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
781 In version 2, the sections of the DWO files are concatenated together
782 and stored in one section of that name. Thus each ELF section contains
783 several "virtual" sections. */
785 struct virtual_v2_dwo_sections
787 bfd_size_type abbrev_offset
;
788 bfd_size_type abbrev_size
;
790 bfd_size_type line_offset
;
791 bfd_size_type line_size
;
793 bfd_size_type loc_offset
;
794 bfd_size_type loc_size
;
796 bfd_size_type macinfo_offset
;
797 bfd_size_type macinfo_size
;
799 bfd_size_type macro_offset
;
800 bfd_size_type macro_size
;
802 bfd_size_type str_offsets_offset
;
803 bfd_size_type str_offsets_size
;
805 /* Each DWP hash table entry records one CU or one TU.
806 That is recorded here, and copied to dwo_unit.section. */
807 bfd_size_type info_or_types_offset
;
808 bfd_size_type info_or_types_size
;
811 /* Contents of DWP hash tables. */
813 struct dwp_hash_table
815 uint32_t version
, nr_columns
;
816 uint32_t nr_units
, nr_slots
;
817 const gdb_byte
*hash_table
, *unit_table
;
822 const gdb_byte
*indices
;
826 /* This is indexed by column number and gives the id of the section
828 #define MAX_NR_V2_DWO_SECTIONS \
829 (1 /* .debug_info or .debug_types */ \
830 + 1 /* .debug_abbrev */ \
831 + 1 /* .debug_line */ \
832 + 1 /* .debug_loc */ \
833 + 1 /* .debug_str_offsets */ \
834 + 1 /* .debug_macro or .debug_macinfo */)
835 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
836 const gdb_byte
*offsets
;
837 const gdb_byte
*sizes
;
842 /* Data for one DWP file. */
846 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
848 dbfd (std::move (abfd
))
852 /* Name of the file. */
855 /* File format version. */
859 gdb_bfd_ref_ptr dbfd
;
861 /* Section info for this file. */
862 struct dwp_sections sections
{};
864 /* Table of CUs in the file. */
865 const struct dwp_hash_table
*cus
= nullptr;
867 /* Table of TUs in the file. */
868 const struct dwp_hash_table
*tus
= nullptr;
870 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
871 htab_t loaded_cus
{};
872 htab_t loaded_tus
{};
874 /* Table to map ELF section numbers to their sections.
875 This is only needed for the DWP V1 file format. */
876 unsigned int num_sections
= 0;
877 asection
**elf_sections
= nullptr;
880 /* Struct used to pass misc. parameters to read_die_and_children, et
881 al. which are used for both .debug_info and .debug_types dies.
882 All parameters here are unchanging for the life of the call. This
883 struct exists to abstract away the constant parameters of die reading. */
885 struct die_reader_specs
887 /* The bfd of die_section. */
890 /* The CU of the DIE we are parsing. */
891 struct dwarf2_cu
*cu
;
893 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
894 struct dwo_file
*dwo_file
;
896 /* The section the die comes from.
897 This is either .debug_info or .debug_types, or the .dwo variants. */
898 struct dwarf2_section_info
*die_section
;
900 /* die_section->buffer. */
901 const gdb_byte
*buffer
;
903 /* The end of the buffer. */
904 const gdb_byte
*buffer_end
;
906 /* The abbreviation table to use when reading the DIEs. */
907 struct abbrev_table
*abbrev_table
;
910 /* A subclass of die_reader_specs that holds storage and has complex
911 constructor and destructor behavior. */
913 class cutu_reader
: public die_reader_specs
917 cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
918 struct abbrev_table
*abbrev_table
,
919 int use_existing_cu
, int keep
,
922 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
923 struct dwarf2_cu
*parent_cu
= nullptr,
924 struct dwo_file
*dwo_file
= nullptr);
928 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
930 const gdb_byte
*info_ptr
= nullptr;
931 struct die_info
*comp_unit_die
= nullptr;
932 bool dummy_p
= false;
935 void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
936 int use_existing_cu
, int keep
);
938 struct dwarf2_per_cu_data
*m_this_cu
;
940 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
942 /* The ordinary abbreviation table. */
943 abbrev_table_up m_abbrev_table_holder
;
945 /* The DWO abbreviation table. */
946 abbrev_table_up m_dwo_abbrev_table
;
949 /* dir_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5 and
951 typedef int dir_index
;
953 /* file_name_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5
955 typedef int file_name_index
;
959 file_entry () = default;
961 file_entry (const char *name_
, dir_index d_index_
,
962 unsigned int mod_time_
, unsigned int length_
)
965 mod_time (mod_time_
),
969 /* Return the include directory at D_INDEX stored in LH. Returns
970 NULL if D_INDEX is out of bounds. */
971 const char *include_dir (const line_header
*lh
) const;
973 /* The file name. Note this is an observing pointer. The memory is
974 owned by debug_line_buffer. */
977 /* The directory index (1-based). */
978 dir_index d_index
{};
980 unsigned int mod_time
{};
982 unsigned int length
{};
984 /* True if referenced by the Line Number Program. */
987 /* The associated symbol table, if any. */
988 struct symtab
*symtab
{};
991 /* The line number information for a compilation unit (found in the
992 .debug_line section) begins with a "statement program header",
993 which contains the following information. */
1000 /* Add an entry to the include directory table. */
1001 void add_include_dir (const char *include_dir
);
1003 /* Add an entry to the file name table. */
1004 void add_file_name (const char *name
, dir_index d_index
,
1005 unsigned int mod_time
, unsigned int length
);
1007 /* Return the include dir at INDEX (0-based in DWARF 5 and 1-based before).
1008 Returns NULL if INDEX is out of bounds. */
1009 const char *include_dir_at (dir_index index
) const
1015 vec_index
= index
- 1;
1016 if (vec_index
< 0 || vec_index
>= m_include_dirs
.size ())
1018 return m_include_dirs
[vec_index
];
1021 bool is_valid_file_index (int file_index
)
1024 return 0 <= file_index
&& file_index
< file_names_size ();
1025 return 1 <= file_index
&& file_index
<= file_names_size ();
1028 /* Return the file name at INDEX (0-based in DWARF 5 and 1-based before).
1029 Returns NULL if INDEX is out of bounds. */
1030 file_entry
*file_name_at (file_name_index index
)
1036 vec_index
= index
- 1;
1037 if (vec_index
< 0 || vec_index
>= m_file_names
.size ())
1039 return &m_file_names
[vec_index
];
1042 /* The indexes are 0-based in DWARF 5 and 1-based in DWARF 4. Therefore,
1043 this method should only be used to iterate through all file entries in an
1044 index-agnostic manner. */
1045 std::vector
<file_entry
> &file_names ()
1046 { return m_file_names
; }
1048 /* Offset of line number information in .debug_line section. */
1049 sect_offset sect_off
{};
1051 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1052 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1054 unsigned int total_length
{};
1055 unsigned short version
{};
1056 unsigned int header_length
{};
1057 unsigned char minimum_instruction_length
{};
1058 unsigned char maximum_ops_per_instruction
{};
1059 unsigned char default_is_stmt
{};
1061 unsigned char line_range
{};
1062 unsigned char opcode_base
{};
1064 /* standard_opcode_lengths[i] is the number of operands for the
1065 standard opcode whose value is i. This means that
1066 standard_opcode_lengths[0] is unused, and the last meaningful
1067 element is standard_opcode_lengths[opcode_base - 1]. */
1068 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1070 int file_names_size ()
1071 { return m_file_names
.size(); }
1073 /* The start and end of the statement program following this
1074 header. These point into dwarf2_per_objfile->line_buffer. */
1075 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1078 /* The include_directories table. Note these are observing
1079 pointers. The memory is owned by debug_line_buffer. */
1080 std::vector
<const char *> m_include_dirs
;
1082 /* The file_names table. This is private because the meaning of indexes
1083 differs among DWARF versions (The first valid index is 1 in DWARF 4 and
1084 before, and is 0 in DWARF 5 and later). So the client should use
1085 file_name_at method for access. */
1086 std::vector
<file_entry
> m_file_names
;
1089 typedef std::unique_ptr
<line_header
> line_header_up
;
1092 file_entry::include_dir (const line_header
*lh
) const
1094 return lh
->include_dir_at (d_index
);
1097 /* When we construct a partial symbol table entry we only
1098 need this much information. */
1099 struct partial_die_info
: public allocate_on_obstack
1101 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1103 /* Disable assign but still keep copy ctor, which is needed
1104 load_partial_dies. */
1105 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1107 /* Adjust the partial die before generating a symbol for it. This
1108 function may set the is_external flag or change the DIE's
1110 void fixup (struct dwarf2_cu
*cu
);
1112 /* Read a minimal amount of information into the minimal die
1114 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1115 const struct abbrev_info
&abbrev
,
1116 const gdb_byte
*info_ptr
);
1118 /* Offset of this DIE. */
1119 const sect_offset sect_off
;
1121 /* DWARF-2 tag for this DIE. */
1122 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1124 /* Assorted flags describing the data found in this DIE. */
1125 const unsigned int has_children
: 1;
1127 unsigned int is_external
: 1;
1128 unsigned int is_declaration
: 1;
1129 unsigned int has_type
: 1;
1130 unsigned int has_specification
: 1;
1131 unsigned int has_pc_info
: 1;
1132 unsigned int may_be_inlined
: 1;
1134 /* This DIE has been marked DW_AT_main_subprogram. */
1135 unsigned int main_subprogram
: 1;
1137 /* Flag set if the SCOPE field of this structure has been
1139 unsigned int scope_set
: 1;
1141 /* Flag set if the DIE has a byte_size attribute. */
1142 unsigned int has_byte_size
: 1;
1144 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1145 unsigned int has_const_value
: 1;
1147 /* Flag set if any of the DIE's children are template arguments. */
1148 unsigned int has_template_arguments
: 1;
1150 /* Flag set if fixup has been called on this die. */
1151 unsigned int fixup_called
: 1;
1153 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1154 unsigned int is_dwz
: 1;
1156 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1157 unsigned int spec_is_dwz
: 1;
1159 /* The name of this DIE. Normally the value of DW_AT_name, but
1160 sometimes a default name for unnamed DIEs. */
1161 const char *name
= nullptr;
1163 /* The linkage name, if present. */
1164 const char *linkage_name
= nullptr;
1166 /* The scope to prepend to our children. This is generally
1167 allocated on the comp_unit_obstack, so will disappear
1168 when this compilation unit leaves the cache. */
1169 const char *scope
= nullptr;
1171 /* Some data associated with the partial DIE. The tag determines
1172 which field is live. */
1175 /* The location description associated with this DIE, if any. */
1176 struct dwarf_block
*locdesc
;
1177 /* The offset of an import, for DW_TAG_imported_unit. */
1178 sect_offset sect_off
;
1181 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1182 CORE_ADDR lowpc
= 0;
1183 CORE_ADDR highpc
= 0;
1185 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1186 DW_AT_sibling, if any. */
1187 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1188 could return DW_AT_sibling values to its caller load_partial_dies. */
1189 const gdb_byte
*sibling
= nullptr;
1191 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1192 DW_AT_specification (or DW_AT_abstract_origin or
1193 DW_AT_extension). */
1194 sect_offset spec_offset
{};
1196 /* Pointers to this DIE's parent, first child, and next sibling,
1198 struct partial_die_info
*die_parent
= nullptr;
1199 struct partial_die_info
*die_child
= nullptr;
1200 struct partial_die_info
*die_sibling
= nullptr;
1202 friend struct partial_die_info
*
1203 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1206 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1207 partial_die_info (sect_offset sect_off
)
1208 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1212 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1214 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1219 has_specification
= 0;
1222 main_subprogram
= 0;
1225 has_const_value
= 0;
1226 has_template_arguments
= 0;
1233 /* This data structure holds a complete die structure. */
1236 /* DWARF-2 tag for this DIE. */
1237 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1239 /* Number of attributes */
1240 unsigned char num_attrs
;
1242 /* True if we're presently building the full type name for the
1243 type derived from this DIE. */
1244 unsigned char building_fullname
: 1;
1246 /* True if this die is in process. PR 16581. */
1247 unsigned char in_process
: 1;
1249 /* True if this DIE has children. */
1250 unsigned char has_children
: 1;
1253 unsigned int abbrev
;
1255 /* Offset in .debug_info or .debug_types section. */
1256 sect_offset sect_off
;
1258 /* The dies in a compilation unit form an n-ary tree. PARENT
1259 points to this die's parent; CHILD points to the first child of
1260 this node; and all the children of a given node are chained
1261 together via their SIBLING fields. */
1262 struct die_info
*child
; /* Its first child, if any. */
1263 struct die_info
*sibling
; /* Its next sibling, if any. */
1264 struct die_info
*parent
; /* Its parent, if any. */
1266 /* An array of attributes, with NUM_ATTRS elements. There may be
1267 zero, but it's not common and zero-sized arrays are not
1268 sufficiently portable C. */
1269 struct attribute attrs
[1];
1272 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1273 but this would require a corresponding change in unpack_field_as_long
1275 static int bits_per_byte
= 8;
1277 /* When reading a variant or variant part, we track a bit more
1278 information about the field, and store it in an object of this
1281 struct variant_field
1283 /* If we see a DW_TAG_variant, then this will be the discriminant
1285 ULONGEST discriminant_value
;
1286 /* If we see a DW_TAG_variant, then this will be set if this is the
1288 bool default_branch
;
1289 /* While reading a DW_TAG_variant_part, this will be set if this
1290 field is the discriminant. */
1291 bool is_discriminant
;
1296 int accessibility
= 0;
1298 /* Extra information to describe a variant or variant part. */
1299 struct variant_field variant
{};
1300 struct field field
{};
1305 const char *name
= nullptr;
1306 std::vector
<struct fn_field
> fnfields
;
1309 /* The routines that read and process dies for a C struct or C++ class
1310 pass lists of data member fields and lists of member function fields
1311 in an instance of a field_info structure, as defined below. */
1314 /* List of data member and baseclasses fields. */
1315 std::vector
<struct nextfield
> fields
;
1316 std::vector
<struct nextfield
> baseclasses
;
1318 /* Number of fields (including baseclasses). */
1321 /* Set if the accessibility of one of the fields is not public. */
1322 int non_public_fields
= 0;
1324 /* Member function fieldlist array, contains name of possibly overloaded
1325 member function, number of overloaded member functions and a pointer
1326 to the head of the member function field chain. */
1327 std::vector
<struct fnfieldlist
> fnfieldlists
;
1329 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1330 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1331 std::vector
<struct decl_field
> typedef_field_list
;
1333 /* Nested types defined by this class and the number of elements in this
1335 std::vector
<struct decl_field
> nested_types_list
;
1338 /* Loaded secondary compilation units are kept in memory until they
1339 have not been referenced for the processing of this many
1340 compilation units. Set this to zero to disable caching. Cache
1341 sizes of up to at least twenty will improve startup time for
1342 typical inter-CU-reference binaries, at an obvious memory cost. */
1343 static int dwarf_max_cache_age
= 5;
1345 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1346 struct cmd_list_element
*c
, const char *value
)
1348 fprintf_filtered (file
, _("The upper bound on the age of cached "
1349 "DWARF compilation units is %s.\n"),
1353 /* local function prototypes */
1355 static void dwarf2_find_base_address (struct die_info
*die
,
1356 struct dwarf2_cu
*cu
);
1358 static dwarf2_psymtab
*create_partial_symtab
1359 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1361 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1362 const gdb_byte
*info_ptr
,
1363 struct die_info
*type_unit_die
);
1365 static void dwarf2_build_psymtabs_hard
1366 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1368 static void scan_partial_symbols (struct partial_die_info
*,
1369 CORE_ADDR
*, CORE_ADDR
*,
1370 int, struct dwarf2_cu
*);
1372 static void add_partial_symbol (struct partial_die_info
*,
1373 struct dwarf2_cu
*);
1375 static void add_partial_namespace (struct partial_die_info
*pdi
,
1376 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1377 int set_addrmap
, struct dwarf2_cu
*cu
);
1379 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1380 CORE_ADDR
*highpc
, int set_addrmap
,
1381 struct dwarf2_cu
*cu
);
1383 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1384 struct dwarf2_cu
*cu
);
1386 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1387 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1388 int need_pc
, struct dwarf2_cu
*cu
);
1390 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1392 static struct partial_die_info
*load_partial_dies
1393 (const struct die_reader_specs
*, const gdb_byte
*, int);
1395 /* A pair of partial_die_info and compilation unit. */
1396 struct cu_partial_die_info
1398 /* The compilation unit of the partial_die_info. */
1399 struct dwarf2_cu
*cu
;
1400 /* A partial_die_info. */
1401 struct partial_die_info
*pdi
;
1403 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1409 cu_partial_die_info () = delete;
1412 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1413 struct dwarf2_cu
*);
1415 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1416 struct attribute
*, struct attr_abbrev
*,
1417 const gdb_byte
*, bool *need_reprocess
);
1419 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1420 struct attribute
*attr
);
1422 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1424 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1427 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1429 static LONGEST read_checked_initial_length_and_offset
1430 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1431 unsigned int *, unsigned int *);
1433 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1434 const struct comp_unit_head
*,
1437 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1439 static sect_offset read_abbrev_offset
1440 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1441 struct dwarf2_section_info
*, sect_offset
);
1443 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1445 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1447 static const char *read_indirect_string
1448 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1449 const struct comp_unit_head
*, unsigned int *);
1451 static const char *read_indirect_line_string
1452 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1453 const struct comp_unit_head
*, unsigned int *);
1455 static const char *read_indirect_string_at_offset
1456 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1457 LONGEST str_offset
);
1459 static const char *read_indirect_string_from_dwz
1460 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1462 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1466 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1467 ULONGEST str_index
);
1469 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1470 ULONGEST str_index
);
1472 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1474 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1475 struct dwarf2_cu
*);
1477 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1480 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1481 struct dwarf2_cu
*cu
);
1483 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1485 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1486 struct dwarf2_cu
*cu
);
1488 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1490 static struct die_info
*die_specification (struct die_info
*die
,
1491 struct dwarf2_cu
**);
1493 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1494 struct dwarf2_cu
*cu
);
1496 static void dwarf_decode_lines (struct line_header
*, const char *,
1497 struct dwarf2_cu
*, dwarf2_psymtab
*,
1498 CORE_ADDR
, int decode_mapping
);
1500 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1503 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1504 struct dwarf2_cu
*, struct symbol
* = NULL
);
1506 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1507 struct dwarf2_cu
*);
1509 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1512 struct obstack
*obstack
,
1513 struct dwarf2_cu
*cu
, LONGEST
*value
,
1514 const gdb_byte
**bytes
,
1515 struct dwarf2_locexpr_baton
**baton
);
1517 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1519 static int need_gnat_info (struct dwarf2_cu
*);
1521 static struct type
*die_descriptive_type (struct die_info
*,
1522 struct dwarf2_cu
*);
1524 static void set_descriptive_type (struct type
*, struct die_info
*,
1525 struct dwarf2_cu
*);
1527 static struct type
*die_containing_type (struct die_info
*,
1528 struct dwarf2_cu
*);
1530 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1531 struct dwarf2_cu
*);
1533 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1535 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1537 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1539 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1540 const char *suffix
, int physname
,
1541 struct dwarf2_cu
*cu
);
1543 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1545 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1547 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1549 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1551 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1553 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1555 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1556 struct dwarf2_cu
*, dwarf2_psymtab
*);
1558 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1559 values. Keep the items ordered with increasing constraints compliance. */
1562 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1563 PC_BOUNDS_NOT_PRESENT
,
1565 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1566 were present but they do not form a valid range of PC addresses. */
1569 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1572 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1576 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1577 CORE_ADDR
*, CORE_ADDR
*,
1581 static void get_scope_pc_bounds (struct die_info
*,
1582 CORE_ADDR
*, CORE_ADDR
*,
1583 struct dwarf2_cu
*);
1585 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1586 CORE_ADDR
, struct dwarf2_cu
*);
1588 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1589 struct dwarf2_cu
*);
1591 static void dwarf2_attach_fields_to_type (struct field_info
*,
1592 struct type
*, struct dwarf2_cu
*);
1594 static void dwarf2_add_member_fn (struct field_info
*,
1595 struct die_info
*, struct type
*,
1596 struct dwarf2_cu
*);
1598 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1600 struct dwarf2_cu
*);
1602 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1604 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1606 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1608 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1610 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1612 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1614 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1616 static struct type
*read_module_type (struct die_info
*die
,
1617 struct dwarf2_cu
*cu
);
1619 static const char *namespace_name (struct die_info
*die
,
1620 int *is_anonymous
, struct dwarf2_cu
*);
1622 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1624 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1626 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1627 struct dwarf2_cu
*);
1629 static struct die_info
*read_die_and_siblings_1
1630 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1633 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1634 const gdb_byte
*info_ptr
,
1635 const gdb_byte
**new_info_ptr
,
1636 struct die_info
*parent
);
1638 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1639 struct die_info
**, const gdb_byte
*,
1642 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1643 struct die_info
**, const gdb_byte
*);
1645 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1647 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1650 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1652 static const char *dwarf2_full_name (const char *name
,
1653 struct die_info
*die
,
1654 struct dwarf2_cu
*cu
);
1656 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1657 struct dwarf2_cu
*cu
);
1659 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1660 struct dwarf2_cu
**);
1662 static const char *dwarf_tag_name (unsigned int);
1664 static const char *dwarf_attr_name (unsigned int);
1666 static const char *dwarf_unit_type_name (int unit_type
);
1668 static const char *dwarf_form_name (unsigned int);
1670 static const char *dwarf_bool_name (unsigned int);
1672 static const char *dwarf_type_encoding_name (unsigned int);
1674 static struct die_info
*sibling_die (struct die_info
*);
1676 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1678 static void dump_die_for_error (struct die_info
*);
1680 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1683 /*static*/ void dump_die (struct die_info
*, int max_level
);
1685 static void store_in_ref_table (struct die_info
*,
1686 struct dwarf2_cu
*);
1688 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1690 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1692 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1693 const struct attribute
*,
1694 struct dwarf2_cu
**);
1696 static struct die_info
*follow_die_ref (struct die_info
*,
1697 const struct attribute
*,
1698 struct dwarf2_cu
**);
1700 static struct die_info
*follow_die_sig (struct die_info
*,
1701 const struct attribute
*,
1702 struct dwarf2_cu
**);
1704 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1705 struct dwarf2_cu
*);
1707 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1708 const struct attribute
*,
1709 struct dwarf2_cu
*);
1711 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1713 static void read_signatured_type (struct signatured_type
*);
1715 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1716 struct die_info
*die
, struct dwarf2_cu
*cu
,
1717 struct dynamic_prop
*prop
, struct type
*type
);
1719 /* memory allocation interface */
1721 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1723 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1725 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1727 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1728 struct dwarf2_loclist_baton
*baton
,
1729 const struct attribute
*attr
);
1731 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1733 struct dwarf2_cu
*cu
,
1736 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1737 const gdb_byte
*info_ptr
,
1738 struct abbrev_info
*abbrev
);
1740 static hashval_t
partial_die_hash (const void *item
);
1742 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1744 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1745 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1746 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1748 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1749 struct die_info
*comp_unit_die
,
1750 enum language pretend_language
);
1752 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1754 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1756 static struct type
*set_die_type (struct die_info
*, struct type
*,
1757 struct dwarf2_cu
*);
1759 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1761 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1763 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1766 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1769 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1772 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1773 struct dwarf2_per_cu_data
*);
1775 static void dwarf2_mark (struct dwarf2_cu
*);
1777 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1779 static struct type
*get_die_type_at_offset (sect_offset
,
1780 struct dwarf2_per_cu_data
*);
1782 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1784 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1785 enum language pretend_language
);
1787 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1789 static struct type
*dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
);
1790 static struct type
*dwarf2_per_cu_addr_sized_int_type
1791 (struct dwarf2_per_cu_data
*per_cu
, bool unsigned_p
);
1792 static struct type
*dwarf2_per_cu_int_type
1793 (struct dwarf2_per_cu_data
*per_cu
, int size_in_bytes
,
1796 /* Class, the destructor of which frees all allocated queue entries. This
1797 will only have work to do if an error was thrown while processing the
1798 dwarf. If no error was thrown then the queue entries should have all
1799 been processed, and freed, as we went along. */
1801 class dwarf2_queue_guard
1804 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1805 : m_per_objfile (per_objfile
)
1809 /* Free any entries remaining on the queue. There should only be
1810 entries left if we hit an error while processing the dwarf. */
1811 ~dwarf2_queue_guard ()
1813 /* Ensure that no memory is allocated by the queue. */
1814 std::queue
<dwarf2_queue_item
> empty
;
1815 std::swap (m_per_objfile
->queue
, empty
);
1818 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1821 dwarf2_per_objfile
*m_per_objfile
;
1824 dwarf2_queue_item::~dwarf2_queue_item ()
1826 /* Anything still marked queued is likely to be in an
1827 inconsistent state, so discard it. */
1830 if (per_cu
->cu
!= NULL
)
1831 free_one_cached_comp_unit (per_cu
);
1836 /* The return type of find_file_and_directory. Note, the enclosed
1837 string pointers are only valid while this object is valid. */
1839 struct file_and_directory
1841 /* The filename. This is never NULL. */
1844 /* The compilation directory. NULL if not known. If we needed to
1845 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1846 points directly to the DW_AT_comp_dir string attribute owned by
1847 the obstack that owns the DIE. */
1848 const char *comp_dir
;
1850 /* If we needed to build a new string for comp_dir, this is what
1851 owns the storage. */
1852 std::string comp_dir_storage
;
1855 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1856 struct dwarf2_cu
*cu
);
1858 static char *file_full_name (int file
, struct line_header
*lh
,
1859 const char *comp_dir
);
1861 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1862 enum class rcuh_kind
{ COMPILE
, TYPE
};
1864 static const gdb_byte
*read_and_check_comp_unit_head
1865 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1866 struct comp_unit_head
*header
,
1867 struct dwarf2_section_info
*section
,
1868 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1869 rcuh_kind section_kind
);
1871 static htab_up
allocate_signatured_type_table (struct objfile
*objfile
);
1873 static htab_up
allocate_dwo_unit_table (struct objfile
*objfile
);
1875 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1876 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1877 struct dwp_file
*dwp_file
, const char *comp_dir
,
1878 ULONGEST signature
, int is_debug_types
);
1880 static struct dwp_file
*get_dwp_file
1881 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1883 static struct dwo_unit
*lookup_dwo_comp_unit
1884 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1886 static struct dwo_unit
*lookup_dwo_type_unit
1887 (struct signatured_type
*, const char *, const char *);
1889 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1891 /* A unique pointer to a dwo_file. */
1893 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1895 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1897 static void check_producer (struct dwarf2_cu
*cu
);
1899 static void free_line_header_voidp (void *arg
);
1901 /* Various complaints about symbol reading that don't abort the process. */
1904 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1906 complaint (_("statement list doesn't fit in .debug_line section"));
1910 dwarf2_debug_line_missing_file_complaint (void)
1912 complaint (_(".debug_line section has line data without a file"));
1916 dwarf2_debug_line_missing_end_sequence_complaint (void)
1918 complaint (_(".debug_line section has line "
1919 "program sequence without an end"));
1923 dwarf2_complex_location_expr_complaint (void)
1925 complaint (_("location expression too complex"));
1929 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1932 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1937 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1939 complaint (_("debug info runs off end of %s section"
1941 section
->get_name (),
1942 section
->get_file_name ());
1946 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1948 complaint (_("macro debug info contains a "
1949 "malformed macro definition:\n`%s'"),
1954 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1956 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1960 /* Hash function for line_header_hash. */
1963 line_header_hash (const struct line_header
*ofs
)
1965 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1968 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1971 line_header_hash_voidp (const void *item
)
1973 const struct line_header
*ofs
= (const struct line_header
*) item
;
1975 return line_header_hash (ofs
);
1978 /* Equality function for line_header_hash. */
1981 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1983 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1984 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1986 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1987 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1992 /* See declaration. */
1994 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1995 const dwarf2_debug_sections
*names
,
1997 : objfile (objfile_
),
1998 can_copy (can_copy_
)
2001 names
= &dwarf2_elf_names
;
2003 bfd
*obfd
= objfile
->obfd
;
2005 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2006 locate_sections (obfd
, sec
, *names
);
2009 dwarf2_per_objfile::~dwarf2_per_objfile ()
2011 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2012 free_cached_comp_units ();
2014 if (quick_file_names_table
)
2015 htab_delete (quick_file_names_table
);
2017 if (line_header_hash
)
2018 htab_delete (line_header_hash
);
2020 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2021 per_cu
->imported_symtabs_free ();
2023 for (signatured_type
*sig_type
: all_type_units
)
2024 sig_type
->per_cu
.imported_symtabs_free ();
2026 /* Everything else should be on the objfile obstack. */
2029 /* See declaration. */
2032 dwarf2_per_objfile::free_cached_comp_units ()
2034 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2035 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2036 while (per_cu
!= NULL
)
2038 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2041 *last_chain
= next_cu
;
2046 /* A helper class that calls free_cached_comp_units on
2049 class free_cached_comp_units
2053 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2054 : m_per_objfile (per_objfile
)
2058 ~free_cached_comp_units ()
2060 m_per_objfile
->free_cached_comp_units ();
2063 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2067 dwarf2_per_objfile
*m_per_objfile
;
2070 /* Try to locate the sections we need for DWARF 2 debugging
2071 information and return true if we have enough to do something.
2072 NAMES points to the dwarf2 section names, or is NULL if the standard
2073 ELF names are used. CAN_COPY is true for formats where symbol
2074 interposition is possible and so symbol values must follow copy
2075 relocation rules. */
2078 dwarf2_has_info (struct objfile
*objfile
,
2079 const struct dwarf2_debug_sections
*names
,
2082 if (objfile
->flags
& OBJF_READNEVER
)
2085 struct dwarf2_per_objfile
*dwarf2_per_objfile
2086 = get_dwarf2_per_objfile (objfile
);
2088 if (dwarf2_per_objfile
== NULL
)
2089 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2093 return (!dwarf2_per_objfile
->info
.is_virtual
2094 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2095 && !dwarf2_per_objfile
->abbrev
.is_virtual
2096 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2099 /* When loading sections, we look either for uncompressed section or for
2100 compressed section names. */
2103 section_is_p (const char *section_name
,
2104 const struct dwarf2_section_names
*names
)
2106 if (names
->normal
!= NULL
2107 && strcmp (section_name
, names
->normal
) == 0)
2109 if (names
->compressed
!= NULL
2110 && strcmp (section_name
, names
->compressed
) == 0)
2115 /* See declaration. */
2118 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2119 const dwarf2_debug_sections
&names
)
2121 flagword aflag
= bfd_section_flags (sectp
);
2123 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2126 else if (elf_section_data (sectp
)->this_hdr
.sh_size
2127 > bfd_get_file_size (abfd
))
2129 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
2130 warning (_("Discarding section %s which has a section size (%s"
2131 ") larger than the file size [in module %s]"),
2132 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
2133 bfd_get_filename (abfd
));
2135 else if (section_is_p (sectp
->name
, &names
.info
))
2137 this->info
.s
.section
= sectp
;
2138 this->info
.size
= bfd_section_size (sectp
);
2140 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2142 this->abbrev
.s
.section
= sectp
;
2143 this->abbrev
.size
= bfd_section_size (sectp
);
2145 else if (section_is_p (sectp
->name
, &names
.line
))
2147 this->line
.s
.section
= sectp
;
2148 this->line
.size
= bfd_section_size (sectp
);
2150 else if (section_is_p (sectp
->name
, &names
.loc
))
2152 this->loc
.s
.section
= sectp
;
2153 this->loc
.size
= bfd_section_size (sectp
);
2155 else if (section_is_p (sectp
->name
, &names
.loclists
))
2157 this->loclists
.s
.section
= sectp
;
2158 this->loclists
.size
= bfd_section_size (sectp
);
2160 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2162 this->macinfo
.s
.section
= sectp
;
2163 this->macinfo
.size
= bfd_section_size (sectp
);
2165 else if (section_is_p (sectp
->name
, &names
.macro
))
2167 this->macro
.s
.section
= sectp
;
2168 this->macro
.size
= bfd_section_size (sectp
);
2170 else if (section_is_p (sectp
->name
, &names
.str
))
2172 this->str
.s
.section
= sectp
;
2173 this->str
.size
= bfd_section_size (sectp
);
2175 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
2177 this->str_offsets
.s
.section
= sectp
;
2178 this->str_offsets
.size
= bfd_section_size (sectp
);
2180 else if (section_is_p (sectp
->name
, &names
.line_str
))
2182 this->line_str
.s
.section
= sectp
;
2183 this->line_str
.size
= bfd_section_size (sectp
);
2185 else if (section_is_p (sectp
->name
, &names
.addr
))
2187 this->addr
.s
.section
= sectp
;
2188 this->addr
.size
= bfd_section_size (sectp
);
2190 else if (section_is_p (sectp
->name
, &names
.frame
))
2192 this->frame
.s
.section
= sectp
;
2193 this->frame
.size
= bfd_section_size (sectp
);
2195 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2197 this->eh_frame
.s
.section
= sectp
;
2198 this->eh_frame
.size
= bfd_section_size (sectp
);
2200 else if (section_is_p (sectp
->name
, &names
.ranges
))
2202 this->ranges
.s
.section
= sectp
;
2203 this->ranges
.size
= bfd_section_size (sectp
);
2205 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2207 this->rnglists
.s
.section
= sectp
;
2208 this->rnglists
.size
= bfd_section_size (sectp
);
2210 else if (section_is_p (sectp
->name
, &names
.types
))
2212 struct dwarf2_section_info type_section
;
2214 memset (&type_section
, 0, sizeof (type_section
));
2215 type_section
.s
.section
= sectp
;
2216 type_section
.size
= bfd_section_size (sectp
);
2218 this->types
.push_back (type_section
);
2220 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2222 this->gdb_index
.s
.section
= sectp
;
2223 this->gdb_index
.size
= bfd_section_size (sectp
);
2225 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2227 this->debug_names
.s
.section
= sectp
;
2228 this->debug_names
.size
= bfd_section_size (sectp
);
2230 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2232 this->debug_aranges
.s
.section
= sectp
;
2233 this->debug_aranges
.size
= bfd_section_size (sectp
);
2236 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2237 && bfd_section_vma (sectp
) == 0)
2238 this->has_section_at_zero
= true;
2241 /* A helper function that returns the size of a section in a safe way.
2242 If you are positive that the section has been read before using the
2243 size, then it is safe to refer to the dwarf2_section_info object's
2244 "size" field directly. In other cases, you must call this
2245 function, because for compressed sections the size field is not set
2246 correctly until the section has been read. */
2248 static bfd_size_type
2249 dwarf2_section_size (struct objfile
*objfile
,
2250 struct dwarf2_section_info
*info
)
2253 info
->read (objfile
);
2257 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2261 dwarf2_get_section_info (struct objfile
*objfile
,
2262 enum dwarf2_section_enum sect
,
2263 asection
**sectp
, const gdb_byte
**bufp
,
2264 bfd_size_type
*sizep
)
2266 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2267 struct dwarf2_section_info
*info
;
2269 /* We may see an objfile without any DWARF, in which case we just
2280 case DWARF2_DEBUG_FRAME
:
2281 info
= &data
->frame
;
2283 case DWARF2_EH_FRAME
:
2284 info
= &data
->eh_frame
;
2287 gdb_assert_not_reached ("unexpected section");
2290 info
->read (objfile
);
2292 *sectp
= info
->get_bfd_section ();
2293 *bufp
= info
->buffer
;
2294 *sizep
= info
->size
;
2297 /* A helper function to find the sections for a .dwz file. */
2300 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2302 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2304 /* Note that we only support the standard ELF names, because .dwz
2305 is ELF-only (at the time of writing). */
2306 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2308 dwz_file
->abbrev
.s
.section
= sectp
;
2309 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2311 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2313 dwz_file
->info
.s
.section
= sectp
;
2314 dwz_file
->info
.size
= bfd_section_size (sectp
);
2316 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2318 dwz_file
->str
.s
.section
= sectp
;
2319 dwz_file
->str
.size
= bfd_section_size (sectp
);
2321 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2323 dwz_file
->line
.s
.section
= sectp
;
2324 dwz_file
->line
.size
= bfd_section_size (sectp
);
2326 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2328 dwz_file
->macro
.s
.section
= sectp
;
2329 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2331 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2333 dwz_file
->gdb_index
.s
.section
= sectp
;
2334 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2336 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2338 dwz_file
->debug_names
.s
.section
= sectp
;
2339 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2343 /* See dwarf2read.h. */
2346 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2348 const char *filename
;
2349 bfd_size_type buildid_len_arg
;
2353 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2354 return dwarf2_per_objfile
->dwz_file
.get ();
2356 bfd_set_error (bfd_error_no_error
);
2357 gdb::unique_xmalloc_ptr
<char> data
2358 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2359 &buildid_len_arg
, &buildid
));
2362 if (bfd_get_error () == bfd_error_no_error
)
2364 error (_("could not read '.gnu_debugaltlink' section: %s"),
2365 bfd_errmsg (bfd_get_error ()));
2368 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2370 buildid_len
= (size_t) buildid_len_arg
;
2372 filename
= data
.get ();
2374 std::string abs_storage
;
2375 if (!IS_ABSOLUTE_PATH (filename
))
2377 gdb::unique_xmalloc_ptr
<char> abs
2378 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2380 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2381 filename
= abs_storage
.c_str ();
2384 /* First try the file name given in the section. If that doesn't
2385 work, try to use the build-id instead. */
2386 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2387 if (dwz_bfd
!= NULL
)
2389 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2390 dwz_bfd
.reset (nullptr);
2393 if (dwz_bfd
== NULL
)
2394 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2396 if (dwz_bfd
== NULL
)
2397 error (_("could not find '.gnu_debugaltlink' file for %s"),
2398 objfile_name (dwarf2_per_objfile
->objfile
));
2400 std::unique_ptr
<struct dwz_file
> result
2401 (new struct dwz_file (std::move (dwz_bfd
)));
2403 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2406 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2407 result
->dwz_bfd
.get ());
2408 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2409 return dwarf2_per_objfile
->dwz_file
.get ();
2412 /* DWARF quick_symbols_functions support. */
2414 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2415 unique line tables, so we maintain a separate table of all .debug_line
2416 derived entries to support the sharing.
2417 All the quick functions need is the list of file names. We discard the
2418 line_header when we're done and don't need to record it here. */
2419 struct quick_file_names
2421 /* The data used to construct the hash key. */
2422 struct stmt_list_hash hash
;
2424 /* The number of entries in file_names, real_names. */
2425 unsigned int num_file_names
;
2427 /* The file names from the line table, after being run through
2429 const char **file_names
;
2431 /* The file names from the line table after being run through
2432 gdb_realpath. These are computed lazily. */
2433 const char **real_names
;
2436 /* When using the index (and thus not using psymtabs), each CU has an
2437 object of this type. This is used to hold information needed by
2438 the various "quick" methods. */
2439 struct dwarf2_per_cu_quick_data
2441 /* The file table. This can be NULL if there was no file table
2442 or it's currently not read in.
2443 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2444 struct quick_file_names
*file_names
;
2446 /* The corresponding symbol table. This is NULL if symbols for this
2447 CU have not yet been read. */
2448 struct compunit_symtab
*compunit_symtab
;
2450 /* A temporary mark bit used when iterating over all CUs in
2451 expand_symtabs_matching. */
2452 unsigned int mark
: 1;
2454 /* True if we've tried to read the file table and found there isn't one.
2455 There will be no point in trying to read it again next time. */
2456 unsigned int no_file_data
: 1;
2459 /* Utility hash function for a stmt_list_hash. */
2462 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2466 if (stmt_list_hash
->dwo_unit
!= NULL
)
2467 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2468 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2472 /* Utility equality function for a stmt_list_hash. */
2475 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2476 const struct stmt_list_hash
*rhs
)
2478 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2480 if (lhs
->dwo_unit
!= NULL
2481 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2484 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2487 /* Hash function for a quick_file_names. */
2490 hash_file_name_entry (const void *e
)
2492 const struct quick_file_names
*file_data
2493 = (const struct quick_file_names
*) e
;
2495 return hash_stmt_list_entry (&file_data
->hash
);
2498 /* Equality function for a quick_file_names. */
2501 eq_file_name_entry (const void *a
, const void *b
)
2503 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2504 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2506 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2509 /* Delete function for a quick_file_names. */
2512 delete_file_name_entry (void *e
)
2514 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2517 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2519 xfree ((void*) file_data
->file_names
[i
]);
2520 if (file_data
->real_names
)
2521 xfree ((void*) file_data
->real_names
[i
]);
2524 /* The space for the struct itself lives on objfile_obstack,
2525 so we don't free it here. */
2528 /* Create a quick_file_names hash table. */
2531 create_quick_file_names_table (unsigned int nr_initial_entries
)
2533 return htab_create_alloc (nr_initial_entries
,
2534 hash_file_name_entry
, eq_file_name_entry
,
2535 delete_file_name_entry
, xcalloc
, xfree
);
2538 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2539 have to be created afterwards. You should call age_cached_comp_units after
2540 processing PER_CU->CU. dw2_setup must have been already called. */
2543 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2545 if (per_cu
->is_debug_types
)
2546 load_full_type_unit (per_cu
);
2548 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2550 if (per_cu
->cu
== NULL
)
2551 return; /* Dummy CU. */
2553 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2556 /* Read in the symbols for PER_CU. */
2559 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2561 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2563 /* Skip type_unit_groups, reading the type units they contain
2564 is handled elsewhere. */
2565 if (IS_TYPE_UNIT_GROUP (per_cu
))
2568 /* The destructor of dwarf2_queue_guard frees any entries left on
2569 the queue. After this point we're guaranteed to leave this function
2570 with the dwarf queue empty. */
2571 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2573 if (dwarf2_per_objfile
->using_index
2574 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2575 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2577 queue_comp_unit (per_cu
, language_minimal
);
2578 load_cu (per_cu
, skip_partial
);
2580 /* If we just loaded a CU from a DWO, and we're working with an index
2581 that may badly handle TUs, load all the TUs in that DWO as well.
2582 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2583 if (!per_cu
->is_debug_types
2584 && per_cu
->cu
!= NULL
2585 && per_cu
->cu
->dwo_unit
!= NULL
2586 && dwarf2_per_objfile
->index_table
!= NULL
2587 && dwarf2_per_objfile
->index_table
->version
<= 7
2588 /* DWP files aren't supported yet. */
2589 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2590 queue_and_load_all_dwo_tus (per_cu
);
2593 process_queue (dwarf2_per_objfile
);
2595 /* Age the cache, releasing compilation units that have not
2596 been used recently. */
2597 age_cached_comp_units (dwarf2_per_objfile
);
2600 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2601 the objfile from which this CU came. Returns the resulting symbol
2604 static struct compunit_symtab
*
2605 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2607 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2609 gdb_assert (dwarf2_per_objfile
->using_index
);
2610 if (!per_cu
->v
.quick
->compunit_symtab
)
2612 free_cached_comp_units
freer (dwarf2_per_objfile
);
2613 scoped_restore decrementer
= increment_reading_symtab ();
2614 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2615 process_cu_includes (dwarf2_per_objfile
);
2618 return per_cu
->v
.quick
->compunit_symtab
;
2621 /* See declaration. */
2623 dwarf2_per_cu_data
*
2624 dwarf2_per_objfile::get_cutu (int index
)
2626 if (index
>= this->all_comp_units
.size ())
2628 index
-= this->all_comp_units
.size ();
2629 gdb_assert (index
< this->all_type_units
.size ());
2630 return &this->all_type_units
[index
]->per_cu
;
2633 return this->all_comp_units
[index
];
2636 /* See declaration. */
2638 dwarf2_per_cu_data
*
2639 dwarf2_per_objfile::get_cu (int index
)
2641 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2643 return this->all_comp_units
[index
];
2646 /* See declaration. */
2649 dwarf2_per_objfile::get_tu (int index
)
2651 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2653 return this->all_type_units
[index
];
2656 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2657 objfile_obstack, and constructed with the specified field
2660 static dwarf2_per_cu_data
*
2661 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2662 struct dwarf2_section_info
*section
,
2664 sect_offset sect_off
, ULONGEST length
)
2666 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2667 dwarf2_per_cu_data
*the_cu
2668 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2669 struct dwarf2_per_cu_data
);
2670 the_cu
->sect_off
= sect_off
;
2671 the_cu
->length
= length
;
2672 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2673 the_cu
->section
= section
;
2674 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2675 struct dwarf2_per_cu_quick_data
);
2676 the_cu
->is_dwz
= is_dwz
;
2680 /* A helper for create_cus_from_index that handles a given list of
2684 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2685 const gdb_byte
*cu_list
, offset_type n_elements
,
2686 struct dwarf2_section_info
*section
,
2689 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2691 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2693 sect_offset sect_off
2694 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2695 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2698 dwarf2_per_cu_data
*per_cu
2699 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2701 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2705 /* Read the CU list from the mapped index, and use it to create all
2706 the CU objects for this objfile. */
2709 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2710 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2711 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2713 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2714 dwarf2_per_objfile
->all_comp_units
.reserve
2715 ((cu_list_elements
+ dwz_elements
) / 2);
2717 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2718 &dwarf2_per_objfile
->info
, 0);
2720 if (dwz_elements
== 0)
2723 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2724 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2728 /* Create the signatured type hash table from the index. */
2731 create_signatured_type_table_from_index
2732 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2733 struct dwarf2_section_info
*section
,
2734 const gdb_byte
*bytes
,
2735 offset_type elements
)
2737 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2739 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2740 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2742 htab_up sig_types_hash
= allocate_signatured_type_table (objfile
);
2744 for (offset_type i
= 0; i
< elements
; i
+= 3)
2746 struct signatured_type
*sig_type
;
2749 cu_offset type_offset_in_tu
;
2751 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2752 sect_offset sect_off
2753 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2755 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2757 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2760 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2761 struct signatured_type
);
2762 sig_type
->signature
= signature
;
2763 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2764 sig_type
->per_cu
.is_debug_types
= 1;
2765 sig_type
->per_cu
.section
= section
;
2766 sig_type
->per_cu
.sect_off
= sect_off
;
2767 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2768 sig_type
->per_cu
.v
.quick
2769 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2770 struct dwarf2_per_cu_quick_data
);
2772 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2775 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2778 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2781 /* Create the signatured type hash table from .debug_names. */
2784 create_signatured_type_table_from_debug_names
2785 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2786 const mapped_debug_names
&map
,
2787 struct dwarf2_section_info
*section
,
2788 struct dwarf2_section_info
*abbrev_section
)
2790 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2792 section
->read (objfile
);
2793 abbrev_section
->read (objfile
);
2795 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2796 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2798 htab_up sig_types_hash
= allocate_signatured_type_table (objfile
);
2800 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2802 struct signatured_type
*sig_type
;
2805 sect_offset sect_off
2806 = (sect_offset
) (extract_unsigned_integer
2807 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2809 map
.dwarf5_byte_order
));
2811 comp_unit_head cu_header
;
2812 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2814 section
->buffer
+ to_underlying (sect_off
),
2817 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2818 struct signatured_type
);
2819 sig_type
->signature
= cu_header
.signature
;
2820 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2821 sig_type
->per_cu
.is_debug_types
= 1;
2822 sig_type
->per_cu
.section
= section
;
2823 sig_type
->per_cu
.sect_off
= sect_off
;
2824 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2825 sig_type
->per_cu
.v
.quick
2826 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2827 struct dwarf2_per_cu_quick_data
);
2829 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2832 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2835 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2838 /* Read the address map data from the mapped index, and use it to
2839 populate the objfile's psymtabs_addrmap. */
2842 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2843 struct mapped_index
*index
)
2845 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2846 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2847 const gdb_byte
*iter
, *end
;
2848 struct addrmap
*mutable_map
;
2851 auto_obstack temp_obstack
;
2853 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2855 iter
= index
->address_table
.data ();
2856 end
= iter
+ index
->address_table
.size ();
2858 baseaddr
= objfile
->text_section_offset ();
2862 ULONGEST hi
, lo
, cu_index
;
2863 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2865 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2867 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2872 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2873 hex_string (lo
), hex_string (hi
));
2877 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2879 complaint (_(".gdb_index address table has invalid CU number %u"),
2880 (unsigned) cu_index
);
2884 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2885 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2886 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2887 dwarf2_per_objfile
->get_cu (cu_index
));
2890 objfile
->partial_symtabs
->psymtabs_addrmap
2891 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2894 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2895 populate the objfile's psymtabs_addrmap. */
2898 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2899 struct dwarf2_section_info
*section
)
2901 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2902 bfd
*abfd
= objfile
->obfd
;
2903 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2904 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2906 auto_obstack temp_obstack
;
2907 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2909 std::unordered_map
<sect_offset
,
2910 dwarf2_per_cu_data
*,
2911 gdb::hash_enum
<sect_offset
>>
2912 debug_info_offset_to_per_cu
;
2913 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2915 const auto insertpair
2916 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2917 if (!insertpair
.second
)
2919 warning (_("Section .debug_aranges in %s has duplicate "
2920 "debug_info_offset %s, ignoring .debug_aranges."),
2921 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2926 section
->read (objfile
);
2928 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2930 const gdb_byte
*addr
= section
->buffer
;
2932 while (addr
< section
->buffer
+ section
->size
)
2934 const gdb_byte
*const entry_addr
= addr
;
2935 unsigned int bytes_read
;
2937 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2941 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2942 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2943 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2944 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2946 warning (_("Section .debug_aranges in %s entry at offset %s "
2947 "length %s exceeds section length %s, "
2948 "ignoring .debug_aranges."),
2949 objfile_name (objfile
),
2950 plongest (entry_addr
- section
->buffer
),
2951 plongest (bytes_read
+ entry_length
),
2952 pulongest (section
->size
));
2956 /* The version number. */
2957 const uint16_t version
= read_2_bytes (abfd
, addr
);
2961 warning (_("Section .debug_aranges in %s entry at offset %s "
2962 "has unsupported version %d, ignoring .debug_aranges."),
2963 objfile_name (objfile
),
2964 plongest (entry_addr
- section
->buffer
), version
);
2968 const uint64_t debug_info_offset
2969 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2970 addr
+= offset_size
;
2971 const auto per_cu_it
2972 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2973 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2975 warning (_("Section .debug_aranges in %s entry at offset %s "
2976 "debug_info_offset %s does not exists, "
2977 "ignoring .debug_aranges."),
2978 objfile_name (objfile
),
2979 plongest (entry_addr
- section
->buffer
),
2980 pulongest (debug_info_offset
));
2983 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2985 const uint8_t address_size
= *addr
++;
2986 if (address_size
< 1 || address_size
> 8)
2988 warning (_("Section .debug_aranges in %s entry at offset %s "
2989 "address_size %u is invalid, ignoring .debug_aranges."),
2990 objfile_name (objfile
),
2991 plongest (entry_addr
- section
->buffer
), address_size
);
2995 const uint8_t segment_selector_size
= *addr
++;
2996 if (segment_selector_size
!= 0)
2998 warning (_("Section .debug_aranges in %s entry at offset %s "
2999 "segment_selector_size %u is not supported, "
3000 "ignoring .debug_aranges."),
3001 objfile_name (objfile
),
3002 plongest (entry_addr
- section
->buffer
),
3003 segment_selector_size
);
3007 /* Must pad to an alignment boundary that is twice the address
3008 size. It is undocumented by the DWARF standard but GCC does
3010 for (size_t padding
= ((-(addr
- section
->buffer
))
3011 & (2 * address_size
- 1));
3012 padding
> 0; padding
--)
3015 warning (_("Section .debug_aranges in %s entry at offset %s "
3016 "padding is not zero, ignoring .debug_aranges."),
3017 objfile_name (objfile
),
3018 plongest (entry_addr
- section
->buffer
));
3024 if (addr
+ 2 * address_size
> entry_end
)
3026 warning (_("Section .debug_aranges in %s entry at offset %s "
3027 "address list is not properly terminated, "
3028 "ignoring .debug_aranges."),
3029 objfile_name (objfile
),
3030 plongest (entry_addr
- section
->buffer
));
3033 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3035 addr
+= address_size
;
3036 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3038 addr
+= address_size
;
3039 if (start
== 0 && length
== 0)
3041 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3043 /* Symbol was eliminated due to a COMDAT group. */
3046 ULONGEST end
= start
+ length
;
3047 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3049 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3051 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3055 objfile
->partial_symtabs
->psymtabs_addrmap
3056 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3059 /* Find a slot in the mapped index INDEX for the object named NAME.
3060 If NAME is found, set *VEC_OUT to point to the CU vector in the
3061 constant pool and return true. If NAME cannot be found, return
3065 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3066 offset_type
**vec_out
)
3069 offset_type slot
, step
;
3070 int (*cmp
) (const char *, const char *);
3072 gdb::unique_xmalloc_ptr
<char> without_params
;
3073 if (current_language
->la_language
== language_cplus
3074 || current_language
->la_language
== language_fortran
3075 || current_language
->la_language
== language_d
)
3077 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3080 if (strchr (name
, '(') != NULL
)
3082 without_params
= cp_remove_params (name
);
3084 if (without_params
!= NULL
)
3085 name
= without_params
.get ();
3089 /* Index version 4 did not support case insensitive searches. But the
3090 indices for case insensitive languages are built in lowercase, therefore
3091 simulate our NAME being searched is also lowercased. */
3092 hash
= mapped_index_string_hash ((index
->version
== 4
3093 && case_sensitivity
== case_sensitive_off
3094 ? 5 : index
->version
),
3097 slot
= hash
& (index
->symbol_table
.size () - 1);
3098 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3099 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3105 const auto &bucket
= index
->symbol_table
[slot
];
3106 if (bucket
.name
== 0 && bucket
.vec
== 0)
3109 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3110 if (!cmp (name
, str
))
3112 *vec_out
= (offset_type
*) (index
->constant_pool
3113 + MAYBE_SWAP (bucket
.vec
));
3117 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3121 /* A helper function that reads the .gdb_index from BUFFER and fills
3122 in MAP. FILENAME is the name of the file containing the data;
3123 it is used for error reporting. DEPRECATED_OK is true if it is
3124 ok to use deprecated sections.
3126 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3127 out parameters that are filled in with information about the CU and
3128 TU lists in the section.
3130 Returns true if all went well, false otherwise. */
3133 read_gdb_index_from_buffer (struct objfile
*objfile
,
3134 const char *filename
,
3136 gdb::array_view
<const gdb_byte
> buffer
,
3137 struct mapped_index
*map
,
3138 const gdb_byte
**cu_list
,
3139 offset_type
*cu_list_elements
,
3140 const gdb_byte
**types_list
,
3141 offset_type
*types_list_elements
)
3143 const gdb_byte
*addr
= &buffer
[0];
3145 /* Version check. */
3146 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3147 /* Versions earlier than 3 emitted every copy of a psymbol. This
3148 causes the index to behave very poorly for certain requests. Version 3
3149 contained incomplete addrmap. So, it seems better to just ignore such
3153 static int warning_printed
= 0;
3154 if (!warning_printed
)
3156 warning (_("Skipping obsolete .gdb_index section in %s."),
3158 warning_printed
= 1;
3162 /* Index version 4 uses a different hash function than index version
3165 Versions earlier than 6 did not emit psymbols for inlined
3166 functions. Using these files will cause GDB not to be able to
3167 set breakpoints on inlined functions by name, so we ignore these
3168 indices unless the user has done
3169 "set use-deprecated-index-sections on". */
3170 if (version
< 6 && !deprecated_ok
)
3172 static int warning_printed
= 0;
3173 if (!warning_printed
)
3176 Skipping deprecated .gdb_index section in %s.\n\
3177 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3178 to use the section anyway."),
3180 warning_printed
= 1;
3184 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3185 of the TU (for symbols coming from TUs),
3186 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3187 Plus gold-generated indices can have duplicate entries for global symbols,
3188 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3189 These are just performance bugs, and we can't distinguish gdb-generated
3190 indices from gold-generated ones, so issue no warning here. */
3192 /* Indexes with higher version than the one supported by GDB may be no
3193 longer backward compatible. */
3197 map
->version
= version
;
3199 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3202 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3203 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3207 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3208 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3209 - MAYBE_SWAP (metadata
[i
]))
3213 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3214 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3216 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3219 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3220 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3222 = gdb::array_view
<mapped_index::symbol_table_slot
>
3223 ((mapped_index::symbol_table_slot
*) symbol_table
,
3224 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3227 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3232 /* Callback types for dwarf2_read_gdb_index. */
3234 typedef gdb::function_view
3235 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3236 get_gdb_index_contents_ftype
;
3237 typedef gdb::function_view
3238 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3239 get_gdb_index_contents_dwz_ftype
;
3241 /* Read .gdb_index. If everything went ok, initialize the "quick"
3242 elements of all the CUs and return 1. Otherwise, return 0. */
3245 dwarf2_read_gdb_index
3246 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3247 get_gdb_index_contents_ftype get_gdb_index_contents
,
3248 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3250 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3251 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3252 struct dwz_file
*dwz
;
3253 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3255 gdb::array_view
<const gdb_byte
> main_index_contents
3256 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3258 if (main_index_contents
.empty ())
3261 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3262 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3263 use_deprecated_index_sections
,
3264 main_index_contents
, map
.get (), &cu_list
,
3265 &cu_list_elements
, &types_list
,
3266 &types_list_elements
))
3269 /* Don't use the index if it's empty. */
3270 if (map
->symbol_table
.empty ())
3273 /* If there is a .dwz file, read it so we can get its CU list as
3275 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3278 struct mapped_index dwz_map
;
3279 const gdb_byte
*dwz_types_ignore
;
3280 offset_type dwz_types_elements_ignore
;
3282 gdb::array_view
<const gdb_byte
> dwz_index_content
3283 = get_gdb_index_contents_dwz (objfile
, dwz
);
3285 if (dwz_index_content
.empty ())
3288 if (!read_gdb_index_from_buffer (objfile
,
3289 bfd_get_filename (dwz
->dwz_bfd
.get ()),
3290 1, dwz_index_content
, &dwz_map
,
3291 &dwz_list
, &dwz_list_elements
,
3293 &dwz_types_elements_ignore
))
3295 warning (_("could not read '.gdb_index' section from %s; skipping"),
3296 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3301 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3302 dwz_list
, dwz_list_elements
);
3304 if (types_list_elements
)
3306 /* We can only handle a single .debug_types when we have an
3308 if (dwarf2_per_objfile
->types
.size () != 1)
3311 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3313 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3314 types_list
, types_list_elements
);
3317 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3319 dwarf2_per_objfile
->index_table
= std::move (map
);
3320 dwarf2_per_objfile
->using_index
= 1;
3321 dwarf2_per_objfile
->quick_file_names_table
=
3322 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3327 /* die_reader_func for dw2_get_file_names. */
3330 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3331 const gdb_byte
*info_ptr
,
3332 struct die_info
*comp_unit_die
)
3334 struct dwarf2_cu
*cu
= reader
->cu
;
3335 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3336 struct dwarf2_per_objfile
*dwarf2_per_objfile
3337 = cu
->per_cu
->dwarf2_per_objfile
;
3338 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3339 struct dwarf2_per_cu_data
*lh_cu
;
3340 struct attribute
*attr
;
3342 struct quick_file_names
*qfn
;
3344 gdb_assert (! this_cu
->is_debug_types
);
3346 /* Our callers never want to match partial units -- instead they
3347 will match the enclosing full CU. */
3348 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3350 this_cu
->v
.quick
->no_file_data
= 1;
3358 sect_offset line_offset
{};
3360 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3361 if (attr
!= nullptr)
3363 struct quick_file_names find_entry
;
3365 line_offset
= (sect_offset
) DW_UNSND (attr
);
3367 /* We may have already read in this line header (TU line header sharing).
3368 If we have we're done. */
3369 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3370 find_entry
.hash
.line_sect_off
= line_offset
;
3371 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3372 &find_entry
, INSERT
);
3375 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3379 lh
= dwarf_decode_line_header (line_offset
, cu
);
3383 lh_cu
->v
.quick
->no_file_data
= 1;
3387 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3388 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3389 qfn
->hash
.line_sect_off
= line_offset
;
3390 gdb_assert (slot
!= NULL
);
3393 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3396 if (strcmp (fnd
.name
, "<unknown>") != 0)
3399 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3401 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3403 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3404 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3405 qfn
->file_names
[i
+ offset
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3406 qfn
->real_names
= NULL
;
3408 lh_cu
->v
.quick
->file_names
= qfn
;
3411 /* A helper for the "quick" functions which attempts to read the line
3412 table for THIS_CU. */
3414 static struct quick_file_names
*
3415 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3417 /* This should never be called for TUs. */
3418 gdb_assert (! this_cu
->is_debug_types
);
3419 /* Nor type unit groups. */
3420 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3422 if (this_cu
->v
.quick
->file_names
!= NULL
)
3423 return this_cu
->v
.quick
->file_names
;
3424 /* If we know there is no line data, no point in looking again. */
3425 if (this_cu
->v
.quick
->no_file_data
)
3428 cutu_reader
reader (this_cu
);
3429 if (!reader
.dummy_p
)
3430 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3432 if (this_cu
->v
.quick
->no_file_data
)
3434 return this_cu
->v
.quick
->file_names
;
3437 /* A helper for the "quick" functions which computes and caches the
3438 real path for a given file name from the line table. */
3441 dw2_get_real_path (struct objfile
*objfile
,
3442 struct quick_file_names
*qfn
, int index
)
3444 if (qfn
->real_names
== NULL
)
3445 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3446 qfn
->num_file_names
, const char *);
3448 if (qfn
->real_names
[index
] == NULL
)
3449 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3451 return qfn
->real_names
[index
];
3454 static struct symtab
*
3455 dw2_find_last_source_symtab (struct objfile
*objfile
)
3457 struct dwarf2_per_objfile
*dwarf2_per_objfile
3458 = get_dwarf2_per_objfile (objfile
);
3459 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3460 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3465 return compunit_primary_filetab (cust
);
3468 /* Traversal function for dw2_forget_cached_source_info. */
3471 dw2_free_cached_file_names (void **slot
, void *info
)
3473 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3475 if (file_data
->real_names
)
3479 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3481 xfree ((void*) file_data
->real_names
[i
]);
3482 file_data
->real_names
[i
] = NULL
;
3490 dw2_forget_cached_source_info (struct objfile
*objfile
)
3492 struct dwarf2_per_objfile
*dwarf2_per_objfile
3493 = get_dwarf2_per_objfile (objfile
);
3495 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3496 dw2_free_cached_file_names
, NULL
);
3499 /* Helper function for dw2_map_symtabs_matching_filename that expands
3500 the symtabs and calls the iterator. */
3503 dw2_map_expand_apply (struct objfile
*objfile
,
3504 struct dwarf2_per_cu_data
*per_cu
,
3505 const char *name
, const char *real_path
,
3506 gdb::function_view
<bool (symtab
*)> callback
)
3508 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3510 /* Don't visit already-expanded CUs. */
3511 if (per_cu
->v
.quick
->compunit_symtab
)
3514 /* This may expand more than one symtab, and we want to iterate over
3516 dw2_instantiate_symtab (per_cu
, false);
3518 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3519 last_made
, callback
);
3522 /* Implementation of the map_symtabs_matching_filename method. */
3525 dw2_map_symtabs_matching_filename
3526 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3527 gdb::function_view
<bool (symtab
*)> callback
)
3529 const char *name_basename
= lbasename (name
);
3530 struct dwarf2_per_objfile
*dwarf2_per_objfile
3531 = get_dwarf2_per_objfile (objfile
);
3533 /* The rule is CUs specify all the files, including those used by
3534 any TU, so there's no need to scan TUs here. */
3536 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3538 /* We only need to look at symtabs not already expanded. */
3539 if (per_cu
->v
.quick
->compunit_symtab
)
3542 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3543 if (file_data
== NULL
)
3546 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3548 const char *this_name
= file_data
->file_names
[j
];
3549 const char *this_real_name
;
3551 if (compare_filenames_for_search (this_name
, name
))
3553 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3559 /* Before we invoke realpath, which can get expensive when many
3560 files are involved, do a quick comparison of the basenames. */
3561 if (! basenames_may_differ
3562 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3565 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3566 if (compare_filenames_for_search (this_real_name
, name
))
3568 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3574 if (real_path
!= NULL
)
3576 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3577 gdb_assert (IS_ABSOLUTE_PATH (name
));
3578 if (this_real_name
!= NULL
3579 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3581 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3593 /* Struct used to manage iterating over all CUs looking for a symbol. */
3595 struct dw2_symtab_iterator
3597 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3598 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3599 /* If set, only look for symbols that match that block. Valid values are
3600 GLOBAL_BLOCK and STATIC_BLOCK. */
3601 gdb::optional
<block_enum
> block_index
;
3602 /* The kind of symbol we're looking for. */
3604 /* The list of CUs from the index entry of the symbol,
3605 or NULL if not found. */
3607 /* The next element in VEC to look at. */
3609 /* The number of elements in VEC, or zero if there is no match. */
3611 /* Have we seen a global version of the symbol?
3612 If so we can ignore all further global instances.
3613 This is to work around gold/15646, inefficient gold-generated
3618 /* Initialize the index symtab iterator ITER. */
3621 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3622 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3623 gdb::optional
<block_enum
> block_index
,
3627 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3628 iter
->block_index
= block_index
;
3629 iter
->domain
= domain
;
3631 iter
->global_seen
= 0;
3633 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3635 /* index is NULL if OBJF_READNOW. */
3636 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3637 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3645 /* Return the next matching CU or NULL if there are no more. */
3647 static struct dwarf2_per_cu_data
*
3648 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3650 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3652 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3654 offset_type cu_index_and_attrs
=
3655 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3656 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3657 gdb_index_symbol_kind symbol_kind
=
3658 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3659 /* Only check the symbol attributes if they're present.
3660 Indices prior to version 7 don't record them,
3661 and indices >= 7 may elide them for certain symbols
3662 (gold does this). */
3664 (dwarf2_per_objfile
->index_table
->version
>= 7
3665 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3667 /* Don't crash on bad data. */
3668 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3669 + dwarf2_per_objfile
->all_type_units
.size ()))
3671 complaint (_(".gdb_index entry has bad CU index"
3673 objfile_name (dwarf2_per_objfile
->objfile
));
3677 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3679 /* Skip if already read in. */
3680 if (per_cu
->v
.quick
->compunit_symtab
)
3683 /* Check static vs global. */
3686 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3688 if (iter
->block_index
.has_value ())
3690 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3692 if (is_static
!= want_static
)
3696 /* Work around gold/15646. */
3697 if (!is_static
&& iter
->global_seen
)
3700 iter
->global_seen
= 1;
3703 /* Only check the symbol's kind if it has one. */
3706 switch (iter
->domain
)
3709 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3710 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3711 /* Some types are also in VAR_DOMAIN. */
3712 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3716 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3720 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3724 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3739 static struct compunit_symtab
*
3740 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3741 const char *name
, domain_enum domain
)
3743 struct compunit_symtab
*stab_best
= NULL
;
3744 struct dwarf2_per_objfile
*dwarf2_per_objfile
3745 = get_dwarf2_per_objfile (objfile
);
3747 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3749 struct dw2_symtab_iterator iter
;
3750 struct dwarf2_per_cu_data
*per_cu
;
3752 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3754 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3756 struct symbol
*sym
, *with_opaque
= NULL
;
3757 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3758 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3759 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3761 sym
= block_find_symbol (block
, name
, domain
,
3762 block_find_non_opaque_type_preferred
,
3765 /* Some caution must be observed with overloaded functions
3766 and methods, since the index will not contain any overload
3767 information (but NAME might contain it). */
3770 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3772 if (with_opaque
!= NULL
3773 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3776 /* Keep looking through other CUs. */
3783 dw2_print_stats (struct objfile
*objfile
)
3785 struct dwarf2_per_objfile
*dwarf2_per_objfile
3786 = get_dwarf2_per_objfile (objfile
);
3787 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3788 + dwarf2_per_objfile
->all_type_units
.size ());
3791 for (int i
= 0; i
< total
; ++i
)
3793 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3795 if (!per_cu
->v
.quick
->compunit_symtab
)
3798 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3799 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3802 /* This dumps minimal information about the index.
3803 It is called via "mt print objfiles".
3804 One use is to verify .gdb_index has been loaded by the
3805 gdb.dwarf2/gdb-index.exp testcase. */
3808 dw2_dump (struct objfile
*objfile
)
3810 struct dwarf2_per_objfile
*dwarf2_per_objfile
3811 = get_dwarf2_per_objfile (objfile
);
3813 gdb_assert (dwarf2_per_objfile
->using_index
);
3814 printf_filtered (".gdb_index:");
3815 if (dwarf2_per_objfile
->index_table
!= NULL
)
3817 printf_filtered (" version %d\n",
3818 dwarf2_per_objfile
->index_table
->version
);
3821 printf_filtered (" faked for \"readnow\"\n");
3822 printf_filtered ("\n");
3826 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3827 const char *func_name
)
3829 struct dwarf2_per_objfile
*dwarf2_per_objfile
3830 = get_dwarf2_per_objfile (objfile
);
3832 struct dw2_symtab_iterator iter
;
3833 struct dwarf2_per_cu_data
*per_cu
;
3835 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3837 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3838 dw2_instantiate_symtab (per_cu
, false);
3843 dw2_expand_all_symtabs (struct objfile
*objfile
)
3845 struct dwarf2_per_objfile
*dwarf2_per_objfile
3846 = get_dwarf2_per_objfile (objfile
);
3847 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3848 + dwarf2_per_objfile
->all_type_units
.size ());
3850 for (int i
= 0; i
< total_units
; ++i
)
3852 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3854 /* We don't want to directly expand a partial CU, because if we
3855 read it with the wrong language, then assertion failures can
3856 be triggered later on. See PR symtab/23010. So, tell
3857 dw2_instantiate_symtab to skip partial CUs -- any important
3858 partial CU will be read via DW_TAG_imported_unit anyway. */
3859 dw2_instantiate_symtab (per_cu
, true);
3864 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3865 const char *fullname
)
3867 struct dwarf2_per_objfile
*dwarf2_per_objfile
3868 = get_dwarf2_per_objfile (objfile
);
3870 /* We don't need to consider type units here.
3871 This is only called for examining code, e.g. expand_line_sal.
3872 There can be an order of magnitude (or more) more type units
3873 than comp units, and we avoid them if we can. */
3875 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3877 /* We only need to look at symtabs not already expanded. */
3878 if (per_cu
->v
.quick
->compunit_symtab
)
3881 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3882 if (file_data
== NULL
)
3885 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3887 const char *this_fullname
= file_data
->file_names
[j
];
3889 if (filename_cmp (this_fullname
, fullname
) == 0)
3891 dw2_instantiate_symtab (per_cu
, false);
3899 dw2_map_matching_symbols
3900 (struct objfile
*objfile
,
3901 const lookup_name_info
&name
, domain_enum domain
,
3903 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3904 symbol_compare_ftype
*ordered_compare
)
3906 /* Currently unimplemented; used for Ada. The function can be called if the
3907 current language is Ada for a non-Ada objfile using GNU index. As Ada
3908 does not look for non-Ada symbols this function should just return. */
3911 /* Starting from a search name, return the string that finds the upper
3912 bound of all strings that start with SEARCH_NAME in a sorted name
3913 list. Returns the empty string to indicate that the upper bound is
3914 the end of the list. */
3917 make_sort_after_prefix_name (const char *search_name
)
3919 /* When looking to complete "func", we find the upper bound of all
3920 symbols that start with "func" by looking for where we'd insert
3921 the closest string that would follow "func" in lexicographical
3922 order. Usually, that's "func"-with-last-character-incremented,
3923 i.e. "fund". Mind non-ASCII characters, though. Usually those
3924 will be UTF-8 multi-byte sequences, but we can't be certain.
3925 Especially mind the 0xff character, which is a valid character in
3926 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3927 rule out compilers allowing it in identifiers. Note that
3928 conveniently, strcmp/strcasecmp are specified to compare
3929 characters interpreted as unsigned char. So what we do is treat
3930 the whole string as a base 256 number composed of a sequence of
3931 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3932 to 0, and carries 1 to the following more-significant position.
3933 If the very first character in SEARCH_NAME ends up incremented
3934 and carries/overflows, then the upper bound is the end of the
3935 list. The string after the empty string is also the empty
3938 Some examples of this operation:
3940 SEARCH_NAME => "+1" RESULT
3944 "\xff" "a" "\xff" => "\xff" "b"
3949 Then, with these symbols for example:
3955 completing "func" looks for symbols between "func" and
3956 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3957 which finds "func" and "func1", but not "fund".
3961 funcÿ (Latin1 'ÿ' [0xff])
3965 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3966 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3970 ÿÿ (Latin1 'ÿ' [0xff])
3973 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3974 the end of the list.
3976 std::string after
= search_name
;
3977 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3979 if (!after
.empty ())
3980 after
.back () = (unsigned char) after
.back () + 1;
3984 /* See declaration. */
3986 std::pair
<std::vector
<name_component
>::const_iterator
,
3987 std::vector
<name_component
>::const_iterator
>
3988 mapped_index_base::find_name_components_bounds
3989 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3992 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3994 const char *lang_name
3995 = lookup_name_without_params
.language_lookup_name (lang
).c_str ();
3997 /* Comparison function object for lower_bound that matches against a
3998 given symbol name. */
3999 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4002 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4003 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4004 return name_cmp (elem_name
, name
) < 0;
4007 /* Comparison function object for upper_bound that matches against a
4008 given symbol name. */
4009 auto lookup_compare_upper
= [&] (const char *name
,
4010 const name_component
&elem
)
4012 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4013 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4014 return name_cmp (name
, elem_name
) < 0;
4017 auto begin
= this->name_components
.begin ();
4018 auto end
= this->name_components
.end ();
4020 /* Find the lower bound. */
4023 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
4026 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
4029 /* Find the upper bound. */
4032 if (lookup_name_without_params
.completion_mode ())
4034 /* In completion mode, we want UPPER to point past all
4035 symbols names that have the same prefix. I.e., with
4036 these symbols, and completing "func":
4038 function << lower bound
4040 other_function << upper bound
4042 We find the upper bound by looking for the insertion
4043 point of "func"-with-last-character-incremented,
4045 std::string after
= make_sort_after_prefix_name (lang_name
);
4048 return std::lower_bound (lower
, end
, after
.c_str (),
4049 lookup_compare_lower
);
4052 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4055 return {lower
, upper
};
4058 /* See declaration. */
4061 mapped_index_base::build_name_components ()
4063 if (!this->name_components
.empty ())
4066 this->name_components_casing
= case_sensitivity
;
4068 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4070 /* The code below only knows how to break apart components of C++
4071 symbol names (and other languages that use '::' as
4072 namespace/module separator) and Ada symbol names. */
4073 auto count
= this->symbol_name_count ();
4074 for (offset_type idx
= 0; idx
< count
; idx
++)
4076 if (this->symbol_name_slot_invalid (idx
))
4079 const char *name
= this->symbol_name_at (idx
);
4081 /* Add each name component to the name component table. */
4082 unsigned int previous_len
= 0;
4084 if (strstr (name
, "::") != nullptr)
4086 for (unsigned int current_len
= cp_find_first_component (name
);
4087 name
[current_len
] != '\0';
4088 current_len
+= cp_find_first_component (name
+ current_len
))
4090 gdb_assert (name
[current_len
] == ':');
4091 this->name_components
.push_back ({previous_len
, idx
});
4092 /* Skip the '::'. */
4094 previous_len
= current_len
;
4099 /* Handle the Ada encoded (aka mangled) form here. */
4100 for (const char *iter
= strstr (name
, "__");
4102 iter
= strstr (iter
, "__"))
4104 this->name_components
.push_back ({previous_len
, idx
});
4106 previous_len
= iter
- name
;
4110 this->name_components
.push_back ({previous_len
, idx
});
4113 /* Sort name_components elements by name. */
4114 auto name_comp_compare
= [&] (const name_component
&left
,
4115 const name_component
&right
)
4117 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4118 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4120 const char *left_name
= left_qualified
+ left
.name_offset
;
4121 const char *right_name
= right_qualified
+ right
.name_offset
;
4123 return name_cmp (left_name
, right_name
) < 0;
4126 std::sort (this->name_components
.begin (),
4127 this->name_components
.end (),
4131 /* Helper for dw2_expand_symtabs_matching that works with a
4132 mapped_index_base instead of the containing objfile. This is split
4133 to a separate function in order to be able to unit test the
4134 name_components matching using a mock mapped_index_base. For each
4135 symbol name that matches, calls MATCH_CALLBACK, passing it the
4136 symbol's index in the mapped_index_base symbol table. */
4139 dw2_expand_symtabs_matching_symbol
4140 (mapped_index_base
&index
,
4141 const lookup_name_info
&lookup_name_in
,
4142 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4143 enum search_domain kind
,
4144 gdb::function_view
<bool (offset_type
)> match_callback
)
4146 lookup_name_info lookup_name_without_params
4147 = lookup_name_in
.make_ignore_params ();
4149 /* Build the symbol name component sorted vector, if we haven't
4151 index
.build_name_components ();
4153 /* The same symbol may appear more than once in the range though.
4154 E.g., if we're looking for symbols that complete "w", and we have
4155 a symbol named "w1::w2", we'll find the two name components for
4156 that same symbol in the range. To be sure we only call the
4157 callback once per symbol, we first collect the symbol name
4158 indexes that matched in a temporary vector and ignore
4160 std::vector
<offset_type
> matches
;
4162 struct name_and_matcher
4164 symbol_name_matcher_ftype
*matcher
;
4165 const std::string
&name
;
4167 bool operator== (const name_and_matcher
&other
) const
4169 return matcher
== other
.matcher
&& name
== other
.name
;
4173 /* A vector holding all the different symbol name matchers, for all
4175 std::vector
<name_and_matcher
> matchers
;
4177 for (int i
= 0; i
< nr_languages
; i
++)
4179 enum language lang_e
= (enum language
) i
;
4181 const language_defn
*lang
= language_def (lang_e
);
4182 symbol_name_matcher_ftype
*name_matcher
4183 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4185 name_and_matcher key
{
4187 lookup_name_without_params
.language_lookup_name (lang_e
)
4190 /* Don't insert the same comparison routine more than once.
4191 Note that we do this linear walk. This is not a problem in
4192 practice because the number of supported languages is
4194 if (std::find (matchers
.begin (), matchers
.end (), key
)
4197 matchers
.push_back (std::move (key
));
4200 = index
.find_name_components_bounds (lookup_name_without_params
,
4203 /* Now for each symbol name in range, check to see if we have a name
4204 match, and if so, call the MATCH_CALLBACK callback. */
4206 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4208 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4210 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4211 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4214 matches
.push_back (bounds
.first
->idx
);
4218 std::sort (matches
.begin (), matches
.end ());
4220 /* Finally call the callback, once per match. */
4222 for (offset_type idx
: matches
)
4226 if (!match_callback (idx
))
4232 /* Above we use a type wider than idx's for 'prev', since 0 and
4233 (offset_type)-1 are both possible values. */
4234 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4239 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4241 /* A mock .gdb_index/.debug_names-like name index table, enough to
4242 exercise dw2_expand_symtabs_matching_symbol, which works with the
4243 mapped_index_base interface. Builds an index from the symbol list
4244 passed as parameter to the constructor. */
4245 class mock_mapped_index
: public mapped_index_base
4248 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4249 : m_symbol_table (symbols
)
4252 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4254 /* Return the number of names in the symbol table. */
4255 size_t symbol_name_count () const override
4257 return m_symbol_table
.size ();
4260 /* Get the name of the symbol at IDX in the symbol table. */
4261 const char *symbol_name_at (offset_type idx
) const override
4263 return m_symbol_table
[idx
];
4267 gdb::array_view
<const char *> m_symbol_table
;
4270 /* Convenience function that converts a NULL pointer to a "<null>"
4271 string, to pass to print routines. */
4274 string_or_null (const char *str
)
4276 return str
!= NULL
? str
: "<null>";
4279 /* Check if a lookup_name_info built from
4280 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4281 index. EXPECTED_LIST is the list of expected matches, in expected
4282 matching order. If no match expected, then an empty list is
4283 specified. Returns true on success. On failure prints a warning
4284 indicating the file:line that failed, and returns false. */
4287 check_match (const char *file
, int line
,
4288 mock_mapped_index
&mock_index
,
4289 const char *name
, symbol_name_match_type match_type
,
4290 bool completion_mode
,
4291 std::initializer_list
<const char *> expected_list
)
4293 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4295 bool matched
= true;
4297 auto mismatch
= [&] (const char *expected_str
,
4300 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4301 "expected=\"%s\", got=\"%s\"\n"),
4303 (match_type
== symbol_name_match_type::FULL
4305 name
, string_or_null (expected_str
), string_or_null (got
));
4309 auto expected_it
= expected_list
.begin ();
4310 auto expected_end
= expected_list
.end ();
4312 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4314 [&] (offset_type idx
)
4316 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4317 const char *expected_str
4318 = expected_it
== expected_end
? NULL
: *expected_it
++;
4320 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4321 mismatch (expected_str
, matched_name
);
4325 const char *expected_str
4326 = expected_it
== expected_end
? NULL
: *expected_it
++;
4327 if (expected_str
!= NULL
)
4328 mismatch (expected_str
, NULL
);
4333 /* The symbols added to the mock mapped_index for testing (in
4335 static const char *test_symbols
[] = {
4344 "ns2::tmpl<int>::foo2",
4345 "(anonymous namespace)::A::B::C",
4347 /* These are used to check that the increment-last-char in the
4348 matching algorithm for completion doesn't match "t1_fund" when
4349 completing "t1_func". */
4355 /* A UTF-8 name with multi-byte sequences to make sure that
4356 cp-name-parser understands this as a single identifier ("função"
4357 is "function" in PT). */
4360 /* \377 (0xff) is Latin1 'ÿ'. */
4363 /* \377 (0xff) is Latin1 'ÿ'. */
4367 /* A name with all sorts of complications. Starts with "z" to make
4368 it easier for the completion tests below. */
4369 #define Z_SYM_NAME \
4370 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4371 "::tuple<(anonymous namespace)::ui*, " \
4372 "std::default_delete<(anonymous namespace)::ui>, void>"
4377 /* Returns true if the mapped_index_base::find_name_component_bounds
4378 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4379 in completion mode. */
4382 check_find_bounds_finds (mapped_index_base
&index
,
4383 const char *search_name
,
4384 gdb::array_view
<const char *> expected_syms
)
4386 lookup_name_info
lookup_name (search_name
,
4387 symbol_name_match_type::FULL
, true);
4389 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4392 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4393 if (distance
!= expected_syms
.size ())
4396 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4398 auto nc_elem
= bounds
.first
+ exp_elem
;
4399 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4400 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4407 /* Test the lower-level mapped_index::find_name_component_bounds
4411 test_mapped_index_find_name_component_bounds ()
4413 mock_mapped_index
mock_index (test_symbols
);
4415 mock_index
.build_name_components ();
4417 /* Test the lower-level mapped_index::find_name_component_bounds
4418 method in completion mode. */
4420 static const char *expected_syms
[] = {
4425 SELF_CHECK (check_find_bounds_finds (mock_index
,
4426 "t1_func", expected_syms
));
4429 /* Check that the increment-last-char in the name matching algorithm
4430 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4432 static const char *expected_syms1
[] = {
4436 SELF_CHECK (check_find_bounds_finds (mock_index
,
4437 "\377", expected_syms1
));
4439 static const char *expected_syms2
[] = {
4442 SELF_CHECK (check_find_bounds_finds (mock_index
,
4443 "\377\377", expected_syms2
));
4447 /* Test dw2_expand_symtabs_matching_symbol. */
4450 test_dw2_expand_symtabs_matching_symbol ()
4452 mock_mapped_index
mock_index (test_symbols
);
4454 /* We let all tests run until the end even if some fails, for debug
4456 bool any_mismatch
= false;
4458 /* Create the expected symbols list (an initializer_list). Needed
4459 because lists have commas, and we need to pass them to CHECK,
4460 which is a macro. */
4461 #define EXPECT(...) { __VA_ARGS__ }
4463 /* Wrapper for check_match that passes down the current
4464 __FILE__/__LINE__. */
4465 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4466 any_mismatch |= !check_match (__FILE__, __LINE__, \
4468 NAME, MATCH_TYPE, COMPLETION_MODE, \
4471 /* Identity checks. */
4472 for (const char *sym
: test_symbols
)
4474 /* Should be able to match all existing symbols. */
4475 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4478 /* Should be able to match all existing symbols with
4480 std::string with_params
= std::string (sym
) + "(int)";
4481 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4484 /* Should be able to match all existing symbols with
4485 parameters and qualifiers. */
4486 with_params
= std::string (sym
) + " ( int ) const";
4487 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4490 /* This should really find sym, but cp-name-parser.y doesn't
4491 know about lvalue/rvalue qualifiers yet. */
4492 with_params
= std::string (sym
) + " ( int ) &&";
4493 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4497 /* Check that the name matching algorithm for completion doesn't get
4498 confused with Latin1 'ÿ' / 0xff. */
4500 static const char str
[] = "\377";
4501 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4502 EXPECT ("\377", "\377\377123"));
4505 /* Check that the increment-last-char in the matching algorithm for
4506 completion doesn't match "t1_fund" when completing "t1_func". */
4508 static const char str
[] = "t1_func";
4509 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4510 EXPECT ("t1_func", "t1_func1"));
4513 /* Check that completion mode works at each prefix of the expected
4516 static const char str
[] = "function(int)";
4517 size_t len
= strlen (str
);
4520 for (size_t i
= 1; i
< len
; i
++)
4522 lookup
.assign (str
, i
);
4523 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4524 EXPECT ("function"));
4528 /* While "w" is a prefix of both components, the match function
4529 should still only be called once. */
4531 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4533 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4537 /* Same, with a "complicated" symbol. */
4539 static const char str
[] = Z_SYM_NAME
;
4540 size_t len
= strlen (str
);
4543 for (size_t i
= 1; i
< len
; i
++)
4545 lookup
.assign (str
, i
);
4546 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4547 EXPECT (Z_SYM_NAME
));
4551 /* In FULL mode, an incomplete symbol doesn't match. */
4553 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4557 /* A complete symbol with parameters matches any overload, since the
4558 index has no overload info. */
4560 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4561 EXPECT ("std::zfunction", "std::zfunction2"));
4562 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4563 EXPECT ("std::zfunction", "std::zfunction2"));
4564 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4565 EXPECT ("std::zfunction", "std::zfunction2"));
4568 /* Check that whitespace is ignored appropriately. A symbol with a
4569 template argument list. */
4571 static const char expected
[] = "ns::foo<int>";
4572 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4574 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4578 /* Check that whitespace is ignored appropriately. A symbol with a
4579 template argument list that includes a pointer. */
4581 static const char expected
[] = "ns::foo<char*>";
4582 /* Try both completion and non-completion modes. */
4583 static const bool completion_mode
[2] = {false, true};
4584 for (size_t i
= 0; i
< 2; i
++)
4586 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4587 completion_mode
[i
], EXPECT (expected
));
4588 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4589 completion_mode
[i
], EXPECT (expected
));
4591 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4592 completion_mode
[i
], EXPECT (expected
));
4593 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4594 completion_mode
[i
], EXPECT (expected
));
4599 /* Check method qualifiers are ignored. */
4600 static const char expected
[] = "ns::foo<char*>";
4601 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4602 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4603 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4604 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4605 CHECK_MATCH ("foo < char * > ( int ) const",
4606 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4607 CHECK_MATCH ("foo < char * > ( int ) &&",
4608 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4611 /* Test lookup names that don't match anything. */
4613 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4616 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4620 /* Some wild matching tests, exercising "(anonymous namespace)",
4621 which should not be confused with a parameter list. */
4623 static const char *syms
[] = {
4627 "A :: B :: C ( int )",
4632 for (const char *s
: syms
)
4634 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4635 EXPECT ("(anonymous namespace)::A::B::C"));
4640 static const char expected
[] = "ns2::tmpl<int>::foo2";
4641 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4643 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4647 SELF_CHECK (!any_mismatch
);
4656 test_mapped_index_find_name_component_bounds ();
4657 test_dw2_expand_symtabs_matching_symbol ();
4660 }} // namespace selftests::dw2_expand_symtabs_matching
4662 #endif /* GDB_SELF_TEST */
4664 /* If FILE_MATCHER is NULL or if PER_CU has
4665 dwarf2_per_cu_quick_data::MARK set (see
4666 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4667 EXPANSION_NOTIFY on it. */
4670 dw2_expand_symtabs_matching_one
4671 (struct dwarf2_per_cu_data
*per_cu
,
4672 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4673 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4675 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4677 bool symtab_was_null
4678 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4680 dw2_instantiate_symtab (per_cu
, false);
4682 if (expansion_notify
!= NULL
4684 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4685 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4689 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4690 matched, to expand corresponding CUs that were marked. IDX is the
4691 index of the symbol name that matched. */
4694 dw2_expand_marked_cus
4695 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4696 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4697 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4700 offset_type
*vec
, vec_len
, vec_idx
;
4701 bool global_seen
= false;
4702 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4704 vec
= (offset_type
*) (index
.constant_pool
4705 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4706 vec_len
= MAYBE_SWAP (vec
[0]);
4707 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4709 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4710 /* This value is only valid for index versions >= 7. */
4711 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4712 gdb_index_symbol_kind symbol_kind
=
4713 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4714 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4715 /* Only check the symbol attributes if they're present.
4716 Indices prior to version 7 don't record them,
4717 and indices >= 7 may elide them for certain symbols
4718 (gold does this). */
4721 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4723 /* Work around gold/15646. */
4726 if (!is_static
&& global_seen
)
4732 /* Only check the symbol's kind if it has one. */
4737 case VARIABLES_DOMAIN
:
4738 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4741 case FUNCTIONS_DOMAIN
:
4742 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4746 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4749 case MODULES_DOMAIN
:
4750 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4758 /* Don't crash on bad data. */
4759 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4760 + dwarf2_per_objfile
->all_type_units
.size ()))
4762 complaint (_(".gdb_index entry has bad CU index"
4764 objfile_name (dwarf2_per_objfile
->objfile
));
4768 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4769 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4774 /* If FILE_MATCHER is non-NULL, set all the
4775 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4776 that match FILE_MATCHER. */
4779 dw_expand_symtabs_matching_file_matcher
4780 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4781 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4783 if (file_matcher
== NULL
)
4786 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4788 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4790 NULL
, xcalloc
, xfree
));
4791 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4793 NULL
, xcalloc
, xfree
));
4795 /* The rule is CUs specify all the files, including those used by
4796 any TU, so there's no need to scan TUs here. */
4798 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4802 per_cu
->v
.quick
->mark
= 0;
4804 /* We only need to look at symtabs not already expanded. */
4805 if (per_cu
->v
.quick
->compunit_symtab
)
4808 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4809 if (file_data
== NULL
)
4812 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4814 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4816 per_cu
->v
.quick
->mark
= 1;
4820 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4822 const char *this_real_name
;
4824 if (file_matcher (file_data
->file_names
[j
], false))
4826 per_cu
->v
.quick
->mark
= 1;
4830 /* Before we invoke realpath, which can get expensive when many
4831 files are involved, do a quick comparison of the basenames. */
4832 if (!basenames_may_differ
4833 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4837 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4838 if (file_matcher (this_real_name
, false))
4840 per_cu
->v
.quick
->mark
= 1;
4845 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4846 ? visited_found
.get ()
4847 : visited_not_found
.get (),
4854 dw2_expand_symtabs_matching
4855 (struct objfile
*objfile
,
4856 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4857 const lookup_name_info
&lookup_name
,
4858 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4859 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4860 enum search_domain kind
)
4862 struct dwarf2_per_objfile
*dwarf2_per_objfile
4863 = get_dwarf2_per_objfile (objfile
);
4865 /* index_table is NULL if OBJF_READNOW. */
4866 if (!dwarf2_per_objfile
->index_table
)
4869 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4871 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4873 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
4875 kind
, [&] (offset_type idx
)
4877 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4878 expansion_notify
, kind
);
4883 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4886 static struct compunit_symtab
*
4887 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4892 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4893 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4896 if (cust
->includes
== NULL
)
4899 for (i
= 0; cust
->includes
[i
]; ++i
)
4901 struct compunit_symtab
*s
= cust
->includes
[i
];
4903 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4911 static struct compunit_symtab
*
4912 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4913 struct bound_minimal_symbol msymbol
,
4915 struct obj_section
*section
,
4918 struct dwarf2_per_cu_data
*data
;
4919 struct compunit_symtab
*result
;
4921 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4924 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4925 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4926 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4930 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4931 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4932 paddress (get_objfile_arch (objfile
), pc
));
4935 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4938 gdb_assert (result
!= NULL
);
4943 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4944 void *data
, int need_fullname
)
4946 struct dwarf2_per_objfile
*dwarf2_per_objfile
4947 = get_dwarf2_per_objfile (objfile
);
4949 if (!dwarf2_per_objfile
->filenames_cache
)
4951 dwarf2_per_objfile
->filenames_cache
.emplace ();
4953 htab_up
visited (htab_create_alloc (10,
4954 htab_hash_pointer
, htab_eq_pointer
,
4955 NULL
, xcalloc
, xfree
));
4957 /* The rule is CUs specify all the files, including those used
4958 by any TU, so there's no need to scan TUs here. We can
4959 ignore file names coming from already-expanded CUs. */
4961 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4963 if (per_cu
->v
.quick
->compunit_symtab
)
4965 void **slot
= htab_find_slot (visited
.get (),
4966 per_cu
->v
.quick
->file_names
,
4969 *slot
= per_cu
->v
.quick
->file_names
;
4973 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4975 /* We only need to look at symtabs not already expanded. */
4976 if (per_cu
->v
.quick
->compunit_symtab
)
4979 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4980 if (file_data
== NULL
)
4983 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4986 /* Already visited. */
4991 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4993 const char *filename
= file_data
->file_names
[j
];
4994 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4999 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5001 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5004 this_real_name
= gdb_realpath (filename
);
5005 (*fun
) (filename
, this_real_name
.get (), data
);
5010 dw2_has_symbols (struct objfile
*objfile
)
5015 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5018 dw2_find_last_source_symtab
,
5019 dw2_forget_cached_source_info
,
5020 dw2_map_symtabs_matching_filename
,
5024 dw2_expand_symtabs_for_function
,
5025 dw2_expand_all_symtabs
,
5026 dw2_expand_symtabs_with_fullname
,
5027 dw2_map_matching_symbols
,
5028 dw2_expand_symtabs_matching
,
5029 dw2_find_pc_sect_compunit_symtab
,
5031 dw2_map_symbol_filenames
5034 /* DWARF-5 debug_names reader. */
5036 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5037 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5039 /* A helper function that reads the .debug_names section in SECTION
5040 and fills in MAP. FILENAME is the name of the file containing the
5041 section; it is used for error reporting.
5043 Returns true if all went well, false otherwise. */
5046 read_debug_names_from_section (struct objfile
*objfile
,
5047 const char *filename
,
5048 struct dwarf2_section_info
*section
,
5049 mapped_debug_names
&map
)
5051 if (section
->empty ())
5054 /* Older elfutils strip versions could keep the section in the main
5055 executable while splitting it for the separate debug info file. */
5056 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5059 section
->read (objfile
);
5061 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5063 const gdb_byte
*addr
= section
->buffer
;
5065 bfd
*const abfd
= section
->get_bfd_owner ();
5067 unsigned int bytes_read
;
5068 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5071 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5072 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5073 if (bytes_read
+ length
!= section
->size
)
5075 /* There may be multiple per-CU indices. */
5076 warning (_("Section .debug_names in %s length %s does not match "
5077 "section length %s, ignoring .debug_names."),
5078 filename
, plongest (bytes_read
+ length
),
5079 pulongest (section
->size
));
5083 /* The version number. */
5084 uint16_t version
= read_2_bytes (abfd
, addr
);
5088 warning (_("Section .debug_names in %s has unsupported version %d, "
5089 "ignoring .debug_names."),
5095 uint16_t padding
= read_2_bytes (abfd
, addr
);
5099 warning (_("Section .debug_names in %s has unsupported padding %d, "
5100 "ignoring .debug_names."),
5105 /* comp_unit_count - The number of CUs in the CU list. */
5106 map
.cu_count
= read_4_bytes (abfd
, addr
);
5109 /* local_type_unit_count - The number of TUs in the local TU
5111 map
.tu_count
= read_4_bytes (abfd
, addr
);
5114 /* foreign_type_unit_count - The number of TUs in the foreign TU
5116 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5118 if (foreign_tu_count
!= 0)
5120 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5121 "ignoring .debug_names."),
5122 filename
, static_cast<unsigned long> (foreign_tu_count
));
5126 /* bucket_count - The number of hash buckets in the hash lookup
5128 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5131 /* name_count - The number of unique names in the index. */
5132 map
.name_count
= read_4_bytes (abfd
, addr
);
5135 /* abbrev_table_size - The size in bytes of the abbreviations
5137 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5140 /* augmentation_string_size - The size in bytes of the augmentation
5141 string. This value is rounded up to a multiple of 4. */
5142 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5144 map
.augmentation_is_gdb
= ((augmentation_string_size
5145 == sizeof (dwarf5_augmentation
))
5146 && memcmp (addr
, dwarf5_augmentation
,
5147 sizeof (dwarf5_augmentation
)) == 0);
5148 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5149 addr
+= augmentation_string_size
;
5152 map
.cu_table_reordered
= addr
;
5153 addr
+= map
.cu_count
* map
.offset_size
;
5155 /* List of Local TUs */
5156 map
.tu_table_reordered
= addr
;
5157 addr
+= map
.tu_count
* map
.offset_size
;
5159 /* Hash Lookup Table */
5160 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5161 addr
+= map
.bucket_count
* 4;
5162 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5163 addr
+= map
.name_count
* 4;
5166 map
.name_table_string_offs_reordered
= addr
;
5167 addr
+= map
.name_count
* map
.offset_size
;
5168 map
.name_table_entry_offs_reordered
= addr
;
5169 addr
+= map
.name_count
* map
.offset_size
;
5171 const gdb_byte
*abbrev_table_start
= addr
;
5174 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5179 const auto insertpair
5180 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5181 if (!insertpair
.second
)
5183 warning (_("Section .debug_names in %s has duplicate index %s, "
5184 "ignoring .debug_names."),
5185 filename
, pulongest (index_num
));
5188 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5189 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5194 mapped_debug_names::index_val::attr attr
;
5195 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5197 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5199 if (attr
.form
== DW_FORM_implicit_const
)
5201 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5205 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5207 indexval
.attr_vec
.push_back (std::move (attr
));
5210 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5212 warning (_("Section .debug_names in %s has abbreviation_table "
5213 "of size %s vs. written as %u, ignoring .debug_names."),
5214 filename
, plongest (addr
- abbrev_table_start
),
5218 map
.entry_pool
= addr
;
5223 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5227 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5228 const mapped_debug_names
&map
,
5229 dwarf2_section_info
§ion
,
5232 sect_offset sect_off_prev
;
5233 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5235 sect_offset sect_off_next
;
5236 if (i
< map
.cu_count
)
5239 = (sect_offset
) (extract_unsigned_integer
5240 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5242 map
.dwarf5_byte_order
));
5245 sect_off_next
= (sect_offset
) section
.size
;
5248 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5249 dwarf2_per_cu_data
*per_cu
5250 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5251 sect_off_prev
, length
);
5252 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5254 sect_off_prev
= sect_off_next
;
5258 /* Read the CU list from the mapped index, and use it to create all
5259 the CU objects for this dwarf2_per_objfile. */
5262 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5263 const mapped_debug_names
&map
,
5264 const mapped_debug_names
&dwz_map
)
5266 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5267 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5269 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5270 dwarf2_per_objfile
->info
,
5271 false /* is_dwz */);
5273 if (dwz_map
.cu_count
== 0)
5276 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5277 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5281 /* Read .debug_names. If everything went ok, initialize the "quick"
5282 elements of all the CUs and return true. Otherwise, return false. */
5285 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5287 std::unique_ptr
<mapped_debug_names
> map
5288 (new mapped_debug_names (dwarf2_per_objfile
));
5289 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5290 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5292 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5293 &dwarf2_per_objfile
->debug_names
,
5297 /* Don't use the index if it's empty. */
5298 if (map
->name_count
== 0)
5301 /* If there is a .dwz file, read it so we can get its CU list as
5303 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5306 if (!read_debug_names_from_section (objfile
,
5307 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5308 &dwz
->debug_names
, dwz_map
))
5310 warning (_("could not read '.debug_names' section from %s; skipping"),
5311 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5316 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5318 if (map
->tu_count
!= 0)
5320 /* We can only handle a single .debug_types when we have an
5322 if (dwarf2_per_objfile
->types
.size () != 1)
5325 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5327 create_signatured_type_table_from_debug_names
5328 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5331 create_addrmap_from_aranges (dwarf2_per_objfile
,
5332 &dwarf2_per_objfile
->debug_aranges
);
5334 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5335 dwarf2_per_objfile
->using_index
= 1;
5336 dwarf2_per_objfile
->quick_file_names_table
=
5337 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5342 /* Type used to manage iterating over all CUs looking for a symbol for
5345 class dw2_debug_names_iterator
5348 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5349 gdb::optional
<block_enum
> block_index
,
5352 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5353 m_addr (find_vec_in_debug_names (map
, name
))
5356 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5357 search_domain search
, uint32_t namei
)
5360 m_addr (find_vec_in_debug_names (map
, namei
))
5363 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5364 block_enum block_index
, domain_enum domain
,
5366 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5367 m_addr (find_vec_in_debug_names (map
, namei
))
5370 /* Return the next matching CU or NULL if there are no more. */
5371 dwarf2_per_cu_data
*next ();
5374 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5376 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5379 /* The internalized form of .debug_names. */
5380 const mapped_debug_names
&m_map
;
5382 /* If set, only look for symbols that match that block. Valid values are
5383 GLOBAL_BLOCK and STATIC_BLOCK. */
5384 const gdb::optional
<block_enum
> m_block_index
;
5386 /* The kind of symbol we're looking for. */
5387 const domain_enum m_domain
= UNDEF_DOMAIN
;
5388 const search_domain m_search
= ALL_DOMAIN
;
5390 /* The list of CUs from the index entry of the symbol, or NULL if
5392 const gdb_byte
*m_addr
;
5396 mapped_debug_names::namei_to_name (uint32_t namei
) const
5398 const ULONGEST namei_string_offs
5399 = extract_unsigned_integer ((name_table_string_offs_reordered
5400 + namei
* offset_size
),
5403 return read_indirect_string_at_offset
5404 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5407 /* Find a slot in .debug_names for the object named NAME. If NAME is
5408 found, return pointer to its pool data. If NAME cannot be found,
5412 dw2_debug_names_iterator::find_vec_in_debug_names
5413 (const mapped_debug_names
&map
, const char *name
)
5415 int (*cmp
) (const char *, const char *);
5417 gdb::unique_xmalloc_ptr
<char> without_params
;
5418 if (current_language
->la_language
== language_cplus
5419 || current_language
->la_language
== language_fortran
5420 || current_language
->la_language
== language_d
)
5422 /* NAME is already canonical. Drop any qualifiers as
5423 .debug_names does not contain any. */
5425 if (strchr (name
, '(') != NULL
)
5427 without_params
= cp_remove_params (name
);
5428 if (without_params
!= NULL
)
5429 name
= without_params
.get ();
5433 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5435 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5437 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5438 (map
.bucket_table_reordered
5439 + (full_hash
% map
.bucket_count
)), 4,
5440 map
.dwarf5_byte_order
);
5444 if (namei
>= map
.name_count
)
5446 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5448 namei
, map
.name_count
,
5449 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5455 const uint32_t namei_full_hash
5456 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5457 (map
.hash_table_reordered
+ namei
), 4,
5458 map
.dwarf5_byte_order
);
5459 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5462 if (full_hash
== namei_full_hash
)
5464 const char *const namei_string
= map
.namei_to_name (namei
);
5466 #if 0 /* An expensive sanity check. */
5467 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5469 complaint (_("Wrong .debug_names hash for string at index %u "
5471 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5476 if (cmp (namei_string
, name
) == 0)
5478 const ULONGEST namei_entry_offs
5479 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5480 + namei
* map
.offset_size
),
5481 map
.offset_size
, map
.dwarf5_byte_order
);
5482 return map
.entry_pool
+ namei_entry_offs
;
5487 if (namei
>= map
.name_count
)
5493 dw2_debug_names_iterator::find_vec_in_debug_names
5494 (const mapped_debug_names
&map
, uint32_t namei
)
5496 if (namei
>= map
.name_count
)
5498 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5500 namei
, map
.name_count
,
5501 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5505 const ULONGEST namei_entry_offs
5506 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5507 + namei
* map
.offset_size
),
5508 map
.offset_size
, map
.dwarf5_byte_order
);
5509 return map
.entry_pool
+ namei_entry_offs
;
5512 /* See dw2_debug_names_iterator. */
5514 dwarf2_per_cu_data
*
5515 dw2_debug_names_iterator::next ()
5520 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5521 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5522 bfd
*const abfd
= objfile
->obfd
;
5526 unsigned int bytes_read
;
5527 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5528 m_addr
+= bytes_read
;
5532 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5533 if (indexval_it
== m_map
.abbrev_map
.cend ())
5535 complaint (_("Wrong .debug_names undefined abbrev code %s "
5537 pulongest (abbrev
), objfile_name (objfile
));
5540 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5541 enum class symbol_linkage
{
5545 } symbol_linkage_
= symbol_linkage::unknown
;
5546 dwarf2_per_cu_data
*per_cu
= NULL
;
5547 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5552 case DW_FORM_implicit_const
:
5553 ull
= attr
.implicit_const
;
5555 case DW_FORM_flag_present
:
5559 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5560 m_addr
+= bytes_read
;
5563 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5564 dwarf_form_name (attr
.form
),
5565 objfile_name (objfile
));
5568 switch (attr
.dw_idx
)
5570 case DW_IDX_compile_unit
:
5571 /* Don't crash on bad data. */
5572 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5574 complaint (_(".debug_names entry has bad CU index %s"
5577 objfile_name (dwarf2_per_objfile
->objfile
));
5580 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5582 case DW_IDX_type_unit
:
5583 /* Don't crash on bad data. */
5584 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5586 complaint (_(".debug_names entry has bad TU index %s"
5589 objfile_name (dwarf2_per_objfile
->objfile
));
5592 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5594 case DW_IDX_GNU_internal
:
5595 if (!m_map
.augmentation_is_gdb
)
5597 symbol_linkage_
= symbol_linkage::static_
;
5599 case DW_IDX_GNU_external
:
5600 if (!m_map
.augmentation_is_gdb
)
5602 symbol_linkage_
= symbol_linkage::extern_
;
5607 /* Skip if already read in. */
5608 if (per_cu
->v
.quick
->compunit_symtab
)
5611 /* Check static vs global. */
5612 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5614 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5615 const bool symbol_is_static
=
5616 symbol_linkage_
== symbol_linkage::static_
;
5617 if (want_static
!= symbol_is_static
)
5621 /* Match dw2_symtab_iter_next, symbol_kind
5622 and debug_names::psymbol_tag. */
5626 switch (indexval
.dwarf_tag
)
5628 case DW_TAG_variable
:
5629 case DW_TAG_subprogram
:
5630 /* Some types are also in VAR_DOMAIN. */
5631 case DW_TAG_typedef
:
5632 case DW_TAG_structure_type
:
5639 switch (indexval
.dwarf_tag
)
5641 case DW_TAG_typedef
:
5642 case DW_TAG_structure_type
:
5649 switch (indexval
.dwarf_tag
)
5652 case DW_TAG_variable
:
5659 switch (indexval
.dwarf_tag
)
5671 /* Match dw2_expand_symtabs_matching, symbol_kind and
5672 debug_names::psymbol_tag. */
5675 case VARIABLES_DOMAIN
:
5676 switch (indexval
.dwarf_tag
)
5678 case DW_TAG_variable
:
5684 case FUNCTIONS_DOMAIN
:
5685 switch (indexval
.dwarf_tag
)
5687 case DW_TAG_subprogram
:
5694 switch (indexval
.dwarf_tag
)
5696 case DW_TAG_typedef
:
5697 case DW_TAG_structure_type
:
5703 case MODULES_DOMAIN
:
5704 switch (indexval
.dwarf_tag
)
5718 static struct compunit_symtab
*
5719 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5720 const char *name
, domain_enum domain
)
5722 struct dwarf2_per_objfile
*dwarf2_per_objfile
5723 = get_dwarf2_per_objfile (objfile
);
5725 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5728 /* index is NULL if OBJF_READNOW. */
5731 const auto &map
= *mapp
;
5733 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5735 struct compunit_symtab
*stab_best
= NULL
;
5736 struct dwarf2_per_cu_data
*per_cu
;
5737 while ((per_cu
= iter
.next ()) != NULL
)
5739 struct symbol
*sym
, *with_opaque
= NULL
;
5740 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5741 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5742 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5744 sym
= block_find_symbol (block
, name
, domain
,
5745 block_find_non_opaque_type_preferred
,
5748 /* Some caution must be observed with overloaded functions and
5749 methods, since the index will not contain any overload
5750 information (but NAME might contain it). */
5753 && strcmp_iw (sym
->search_name (), name
) == 0)
5755 if (with_opaque
!= NULL
5756 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5759 /* Keep looking through other CUs. */
5765 /* This dumps minimal information about .debug_names. It is called
5766 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5767 uses this to verify that .debug_names has been loaded. */
5770 dw2_debug_names_dump (struct objfile
*objfile
)
5772 struct dwarf2_per_objfile
*dwarf2_per_objfile
5773 = get_dwarf2_per_objfile (objfile
);
5775 gdb_assert (dwarf2_per_objfile
->using_index
);
5776 printf_filtered (".debug_names:");
5777 if (dwarf2_per_objfile
->debug_names_table
)
5778 printf_filtered (" exists\n");
5780 printf_filtered (" faked for \"readnow\"\n");
5781 printf_filtered ("\n");
5785 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5786 const char *func_name
)
5788 struct dwarf2_per_objfile
*dwarf2_per_objfile
5789 = get_dwarf2_per_objfile (objfile
);
5791 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5792 if (dwarf2_per_objfile
->debug_names_table
)
5794 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5796 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5798 struct dwarf2_per_cu_data
*per_cu
;
5799 while ((per_cu
= iter
.next ()) != NULL
)
5800 dw2_instantiate_symtab (per_cu
, false);
5805 dw2_debug_names_map_matching_symbols
5806 (struct objfile
*objfile
,
5807 const lookup_name_info
&name
, domain_enum domain
,
5809 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5810 symbol_compare_ftype
*ordered_compare
)
5812 struct dwarf2_per_objfile
*dwarf2_per_objfile
5813 = get_dwarf2_per_objfile (objfile
);
5815 /* debug_names_table is NULL if OBJF_READNOW. */
5816 if (!dwarf2_per_objfile
->debug_names_table
)
5819 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5820 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5822 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5823 auto matcher
= [&] (const char *symname
)
5825 if (ordered_compare
== nullptr)
5827 return ordered_compare (symname
, match_name
) == 0;
5830 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5831 [&] (offset_type namei
)
5833 /* The name was matched, now expand corresponding CUs that were
5835 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5837 struct dwarf2_per_cu_data
*per_cu
;
5838 while ((per_cu
= iter
.next ()) != NULL
)
5839 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5843 /* It's a shame we couldn't do this inside the
5844 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5845 that have already been expanded. Instead, this loop matches what
5846 the psymtab code does. */
5847 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5849 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5850 if (cust
!= nullptr)
5852 const struct block
*block
5853 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5854 if (!iterate_over_symbols_terminated (block
, name
,
5862 dw2_debug_names_expand_symtabs_matching
5863 (struct objfile
*objfile
,
5864 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5865 const lookup_name_info
&lookup_name
,
5866 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5867 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5868 enum search_domain kind
)
5870 struct dwarf2_per_objfile
*dwarf2_per_objfile
5871 = get_dwarf2_per_objfile (objfile
);
5873 /* debug_names_table is NULL if OBJF_READNOW. */
5874 if (!dwarf2_per_objfile
->debug_names_table
)
5877 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5879 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5881 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
5883 kind
, [&] (offset_type namei
)
5885 /* The name was matched, now expand corresponding CUs that were
5887 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5889 struct dwarf2_per_cu_data
*per_cu
;
5890 while ((per_cu
= iter
.next ()) != NULL
)
5891 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5897 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5900 dw2_find_last_source_symtab
,
5901 dw2_forget_cached_source_info
,
5902 dw2_map_symtabs_matching_filename
,
5903 dw2_debug_names_lookup_symbol
,
5905 dw2_debug_names_dump
,
5906 dw2_debug_names_expand_symtabs_for_function
,
5907 dw2_expand_all_symtabs
,
5908 dw2_expand_symtabs_with_fullname
,
5909 dw2_debug_names_map_matching_symbols
,
5910 dw2_debug_names_expand_symtabs_matching
,
5911 dw2_find_pc_sect_compunit_symtab
,
5913 dw2_map_symbol_filenames
5916 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5917 to either a dwarf2_per_objfile or dwz_file object. */
5919 template <typename T
>
5920 static gdb::array_view
<const gdb_byte
>
5921 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5923 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5925 if (section
->empty ())
5928 /* Older elfutils strip versions could keep the section in the main
5929 executable while splitting it for the separate debug info file. */
5930 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5933 section
->read (obj
);
5935 /* dwarf2_section_info::size is a bfd_size_type, while
5936 gdb::array_view works with size_t. On 32-bit hosts, with
5937 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5938 is 32-bit. So we need an explicit narrowing conversion here.
5939 This is fine, because it's impossible to allocate or mmap an
5940 array/buffer larger than what size_t can represent. */
5941 return gdb::make_array_view (section
->buffer
, section
->size
);
5944 /* Lookup the index cache for the contents of the index associated to
5947 static gdb::array_view
<const gdb_byte
>
5948 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5950 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5951 if (build_id
== nullptr)
5954 return global_index_cache
.lookup_gdb_index (build_id
,
5955 &dwarf2_obj
->index_cache_res
);
5958 /* Same as the above, but for DWZ. */
5960 static gdb::array_view
<const gdb_byte
>
5961 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5963 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5964 if (build_id
== nullptr)
5967 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5970 /* See symfile.h. */
5973 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5975 struct dwarf2_per_objfile
*dwarf2_per_objfile
5976 = get_dwarf2_per_objfile (objfile
);
5978 /* If we're about to read full symbols, don't bother with the
5979 indices. In this case we also don't care if some other debug
5980 format is making psymtabs, because they are all about to be
5982 if ((objfile
->flags
& OBJF_READNOW
))
5984 dwarf2_per_objfile
->using_index
= 1;
5985 create_all_comp_units (dwarf2_per_objfile
);
5986 create_all_type_units (dwarf2_per_objfile
);
5987 dwarf2_per_objfile
->quick_file_names_table
5988 = create_quick_file_names_table
5989 (dwarf2_per_objfile
->all_comp_units
.size ());
5991 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5992 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5994 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5996 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5997 struct dwarf2_per_cu_quick_data
);
6000 /* Return 1 so that gdb sees the "quick" functions. However,
6001 these functions will be no-ops because we will have expanded
6003 *index_kind
= dw_index_kind::GDB_INDEX
;
6007 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6009 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6013 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6014 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6015 get_gdb_index_contents_from_section
<dwz_file
>))
6017 *index_kind
= dw_index_kind::GDB_INDEX
;
6021 /* ... otherwise, try to find the index in the index cache. */
6022 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6023 get_gdb_index_contents_from_cache
,
6024 get_gdb_index_contents_from_cache_dwz
))
6026 global_index_cache
.hit ();
6027 *index_kind
= dw_index_kind::GDB_INDEX
;
6031 global_index_cache
.miss ();
6037 /* Build a partial symbol table. */
6040 dwarf2_build_psymtabs (struct objfile
*objfile
)
6042 struct dwarf2_per_objfile
*dwarf2_per_objfile
6043 = get_dwarf2_per_objfile (objfile
);
6045 init_psymbol_list (objfile
, 1024);
6049 /* This isn't really ideal: all the data we allocate on the
6050 objfile's obstack is still uselessly kept around. However,
6051 freeing it seems unsafe. */
6052 psymtab_discarder
psymtabs (objfile
);
6053 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6056 /* (maybe) store an index in the cache. */
6057 global_index_cache
.store (dwarf2_per_objfile
);
6059 catch (const gdb_exception_error
&except
)
6061 exception_print (gdb_stderr
, except
);
6065 /* Return the total length of the CU described by HEADER. */
6068 get_cu_length (const struct comp_unit_head
*header
)
6070 return header
->initial_length_size
+ header
->length
;
6073 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6076 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6078 sect_offset bottom
= cu_header
->sect_off
;
6079 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6081 return sect_off
>= bottom
&& sect_off
< top
;
6084 /* Find the base address of the compilation unit for range lists and
6085 location lists. It will normally be specified by DW_AT_low_pc.
6086 In DWARF-3 draft 4, the base address could be overridden by
6087 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6088 compilation units with discontinuous ranges. */
6091 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6093 struct attribute
*attr
;
6096 cu
->base_address
= 0;
6098 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6099 if (attr
!= nullptr)
6101 cu
->base_address
= attr
->value_as_address ();
6106 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6107 if (attr
!= nullptr)
6109 cu
->base_address
= attr
->value_as_address ();
6115 /* Read in the comp unit header information from the debug_info at info_ptr.
6116 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6117 NOTE: This leaves members offset, first_die_offset to be filled in
6120 static const gdb_byte
*
6121 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6122 const gdb_byte
*info_ptr
,
6123 struct dwarf2_section_info
*section
,
6124 rcuh_kind section_kind
)
6127 unsigned int bytes_read
;
6128 const char *filename
= section
->get_file_name ();
6129 bfd
*abfd
= section
->get_bfd_owner ();
6131 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6132 cu_header
->initial_length_size
= bytes_read
;
6133 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6134 info_ptr
+= bytes_read
;
6135 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6136 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6137 error (_("Dwarf Error: wrong version in compilation unit header "
6138 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6139 cu_header
->version
, filename
);
6141 if (cu_header
->version
< 5)
6142 switch (section_kind
)
6144 case rcuh_kind::COMPILE
:
6145 cu_header
->unit_type
= DW_UT_compile
;
6147 case rcuh_kind::TYPE
:
6148 cu_header
->unit_type
= DW_UT_type
;
6151 internal_error (__FILE__
, __LINE__
,
6152 _("read_comp_unit_head: invalid section_kind"));
6156 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6157 (read_1_byte (abfd
, info_ptr
));
6159 switch (cu_header
->unit_type
)
6163 case DW_UT_skeleton
:
6164 case DW_UT_split_compile
:
6165 if (section_kind
!= rcuh_kind::COMPILE
)
6166 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6167 "(is %s, should be %s) [in module %s]"),
6168 dwarf_unit_type_name (cu_header
->unit_type
),
6169 dwarf_unit_type_name (DW_UT_type
), filename
);
6172 case DW_UT_split_type
:
6173 section_kind
= rcuh_kind::TYPE
;
6176 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6177 "(is %#04x, should be one of: %s, %s, %s, %s or %s) "
6178 "[in module %s]"), cu_header
->unit_type
,
6179 dwarf_unit_type_name (DW_UT_compile
),
6180 dwarf_unit_type_name (DW_UT_skeleton
),
6181 dwarf_unit_type_name (DW_UT_split_compile
),
6182 dwarf_unit_type_name (DW_UT_type
),
6183 dwarf_unit_type_name (DW_UT_split_type
), filename
);
6186 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6189 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6192 info_ptr
+= bytes_read
;
6193 if (cu_header
->version
< 5)
6195 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6198 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6199 if (signed_addr
< 0)
6200 internal_error (__FILE__
, __LINE__
,
6201 _("read_comp_unit_head: dwarf from non elf file"));
6202 cu_header
->signed_addr_p
= signed_addr
;
6204 bool header_has_signature
= section_kind
== rcuh_kind::TYPE
6205 || cu_header
->unit_type
== DW_UT_skeleton
6206 || cu_header
->unit_type
== DW_UT_split_compile
;
6208 if (header_has_signature
)
6210 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6214 if (section_kind
== rcuh_kind::TYPE
)
6216 LONGEST type_offset
;
6217 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6218 info_ptr
+= bytes_read
;
6219 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6220 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6221 error (_("Dwarf Error: Too big type_offset in compilation unit "
6222 "header (is %s) [in module %s]"), plongest (type_offset
),
6229 /* Helper function that returns the proper abbrev section for
6232 static struct dwarf2_section_info
*
6233 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6235 struct dwarf2_section_info
*abbrev
;
6236 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6238 if (this_cu
->is_dwz
)
6239 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6241 abbrev
= &dwarf2_per_objfile
->abbrev
;
6246 /* Subroutine of read_and_check_comp_unit_head and
6247 read_and_check_type_unit_head to simplify them.
6248 Perform various error checking on the header. */
6251 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6252 struct comp_unit_head
*header
,
6253 struct dwarf2_section_info
*section
,
6254 struct dwarf2_section_info
*abbrev_section
)
6256 const char *filename
= section
->get_file_name ();
6258 if (to_underlying (header
->abbrev_sect_off
)
6259 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6260 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6261 "(offset %s + 6) [in module %s]"),
6262 sect_offset_str (header
->abbrev_sect_off
),
6263 sect_offset_str (header
->sect_off
),
6266 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6267 avoid potential 32-bit overflow. */
6268 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6270 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6271 "(offset %s + 0) [in module %s]"),
6272 header
->length
, sect_offset_str (header
->sect_off
),
6276 /* Read in a CU/TU header and perform some basic error checking.
6277 The contents of the header are stored in HEADER.
6278 The result is a pointer to the start of the first DIE. */
6280 static const gdb_byte
*
6281 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6282 struct comp_unit_head
*header
,
6283 struct dwarf2_section_info
*section
,
6284 struct dwarf2_section_info
*abbrev_section
,
6285 const gdb_byte
*info_ptr
,
6286 rcuh_kind section_kind
)
6288 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6290 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6292 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6294 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6296 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6302 /* Fetch the abbreviation table offset from a comp or type unit header. */
6305 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6306 struct dwarf2_section_info
*section
,
6307 sect_offset sect_off
)
6309 bfd
*abfd
= section
->get_bfd_owner ();
6310 const gdb_byte
*info_ptr
;
6311 unsigned int initial_length_size
, offset_size
;
6314 section
->read (dwarf2_per_objfile
->objfile
);
6315 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6316 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6317 offset_size
= initial_length_size
== 4 ? 4 : 8;
6318 info_ptr
+= initial_length_size
;
6320 version
= read_2_bytes (abfd
, info_ptr
);
6324 /* Skip unit type and address size. */
6328 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6331 /* Allocate a new partial symtab for file named NAME and mark this new
6332 partial symtab as being an include of PST. */
6335 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6336 struct objfile
*objfile
)
6338 dwarf2_psymtab
*subpst
= new dwarf2_psymtab (name
, objfile
);
6340 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6342 /* It shares objfile->objfile_obstack. */
6343 subpst
->dirname
= pst
->dirname
;
6346 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6347 subpst
->dependencies
[0] = pst
;
6348 subpst
->number_of_dependencies
= 1;
6350 /* No private part is necessary for include psymtabs. This property
6351 can be used to differentiate between such include psymtabs and
6352 the regular ones. */
6353 subpst
->per_cu_data
= nullptr;
6356 /* Read the Line Number Program data and extract the list of files
6357 included by the source file represented by PST. Build an include
6358 partial symtab for each of these included files. */
6361 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6362 struct die_info
*die
,
6363 dwarf2_psymtab
*pst
)
6366 struct attribute
*attr
;
6368 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6369 if (attr
!= nullptr)
6370 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6372 return; /* No linetable, so no includes. */
6374 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6375 that we pass in the raw text_low here; that is ok because we're
6376 only decoding the line table to make include partial symtabs, and
6377 so the addresses aren't really used. */
6378 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6379 pst
->raw_text_low (), 1);
6383 hash_signatured_type (const void *item
)
6385 const struct signatured_type
*sig_type
6386 = (const struct signatured_type
*) item
;
6388 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6389 return sig_type
->signature
;
6393 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6395 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6396 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6398 return lhs
->signature
== rhs
->signature
;
6401 /* Allocate a hash table for signatured types. */
6404 allocate_signatured_type_table (struct objfile
*objfile
)
6406 return htab_up (htab_create_alloc (41,
6407 hash_signatured_type
,
6409 NULL
, xcalloc
, xfree
));
6412 /* A helper function to add a signatured type CU to a table. */
6415 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6417 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6418 std::vector
<signatured_type
*> *all_type_units
6419 = (std::vector
<signatured_type
*> *) datum
;
6421 all_type_units
->push_back (sigt
);
6426 /* A helper for create_debug_types_hash_table. Read types from SECTION
6427 and fill them into TYPES_HTAB. It will process only type units,
6428 therefore DW_UT_type. */
6431 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6432 struct dwo_file
*dwo_file
,
6433 dwarf2_section_info
*section
, htab_up
&types_htab
,
6434 rcuh_kind section_kind
)
6436 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6437 struct dwarf2_section_info
*abbrev_section
;
6439 const gdb_byte
*info_ptr
, *end_ptr
;
6441 abbrev_section
= (dwo_file
!= NULL
6442 ? &dwo_file
->sections
.abbrev
6443 : &dwarf2_per_objfile
->abbrev
);
6445 if (dwarf_read_debug
)
6446 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6447 section
->get_name (),
6448 abbrev_section
->get_file_name ());
6450 section
->read (objfile
);
6451 info_ptr
= section
->buffer
;
6453 if (info_ptr
== NULL
)
6456 /* We can't set abfd until now because the section may be empty or
6457 not present, in which case the bfd is unknown. */
6458 abfd
= section
->get_bfd_owner ();
6460 /* We don't use cutu_reader here because we don't need to read
6461 any dies: the signature is in the header. */
6463 end_ptr
= info_ptr
+ section
->size
;
6464 while (info_ptr
< end_ptr
)
6466 struct signatured_type
*sig_type
;
6467 struct dwo_unit
*dwo_tu
;
6469 const gdb_byte
*ptr
= info_ptr
;
6470 struct comp_unit_head header
;
6471 unsigned int length
;
6473 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6475 /* Initialize it due to a false compiler warning. */
6476 header
.signature
= -1;
6477 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6479 /* We need to read the type's signature in order to build the hash
6480 table, but we don't need anything else just yet. */
6482 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6483 abbrev_section
, ptr
, section_kind
);
6485 length
= get_cu_length (&header
);
6487 /* Skip dummy type units. */
6488 if (ptr
>= info_ptr
+ length
6489 || peek_abbrev_code (abfd
, ptr
) == 0
6490 || header
.unit_type
!= DW_UT_type
)
6496 if (types_htab
== NULL
)
6499 types_htab
= allocate_dwo_unit_table (objfile
);
6501 types_htab
= allocate_signatured_type_table (objfile
);
6507 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6509 dwo_tu
->dwo_file
= dwo_file
;
6510 dwo_tu
->signature
= header
.signature
;
6511 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6512 dwo_tu
->section
= section
;
6513 dwo_tu
->sect_off
= sect_off
;
6514 dwo_tu
->length
= length
;
6518 /* N.B.: type_offset is not usable if this type uses a DWO file.
6519 The real type_offset is in the DWO file. */
6521 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6522 struct signatured_type
);
6523 sig_type
->signature
= header
.signature
;
6524 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6525 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6526 sig_type
->per_cu
.is_debug_types
= 1;
6527 sig_type
->per_cu
.section
= section
;
6528 sig_type
->per_cu
.sect_off
= sect_off
;
6529 sig_type
->per_cu
.length
= length
;
6532 slot
= htab_find_slot (types_htab
.get (),
6533 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6535 gdb_assert (slot
!= NULL
);
6538 sect_offset dup_sect_off
;
6542 const struct dwo_unit
*dup_tu
6543 = (const struct dwo_unit
*) *slot
;
6545 dup_sect_off
= dup_tu
->sect_off
;
6549 const struct signatured_type
*dup_tu
6550 = (const struct signatured_type
*) *slot
;
6552 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6555 complaint (_("debug type entry at offset %s is duplicate to"
6556 " the entry at offset %s, signature %s"),
6557 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6558 hex_string (header
.signature
));
6560 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6562 if (dwarf_read_debug
> 1)
6563 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6564 sect_offset_str (sect_off
),
6565 hex_string (header
.signature
));
6571 /* Create the hash table of all entries in the .debug_types
6572 (or .debug_types.dwo) section(s).
6573 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6574 otherwise it is NULL.
6576 The result is a pointer to the hash table or NULL if there are no types.
6578 Note: This function processes DWO files only, not DWP files. */
6581 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6582 struct dwo_file
*dwo_file
,
6583 gdb::array_view
<dwarf2_section_info
> type_sections
,
6584 htab_up
&types_htab
)
6586 for (dwarf2_section_info
§ion
: type_sections
)
6587 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6588 types_htab
, rcuh_kind::TYPE
);
6591 /* Create the hash table of all entries in the .debug_types section,
6592 and initialize all_type_units.
6593 The result is zero if there is an error (e.g. missing .debug_types section),
6594 otherwise non-zero. */
6597 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6601 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6602 &dwarf2_per_objfile
->info
, types_htab
,
6603 rcuh_kind::COMPILE
);
6604 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6605 dwarf2_per_objfile
->types
, types_htab
);
6606 if (types_htab
== NULL
)
6608 dwarf2_per_objfile
->signatured_types
= NULL
;
6612 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6614 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6615 dwarf2_per_objfile
->all_type_units
.reserve
6616 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6618 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6619 add_signatured_type_cu_to_table
,
6620 &dwarf2_per_objfile
->all_type_units
);
6625 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6626 If SLOT is non-NULL, it is the entry to use in the hash table.
6627 Otherwise we find one. */
6629 static struct signatured_type
*
6630 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6633 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6635 if (dwarf2_per_objfile
->all_type_units
.size ()
6636 == dwarf2_per_objfile
->all_type_units
.capacity ())
6637 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6639 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6640 struct signatured_type
);
6642 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6643 sig_type
->signature
= sig
;
6644 sig_type
->per_cu
.is_debug_types
= 1;
6645 if (dwarf2_per_objfile
->using_index
)
6647 sig_type
->per_cu
.v
.quick
=
6648 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6649 struct dwarf2_per_cu_quick_data
);
6654 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6657 gdb_assert (*slot
== NULL
);
6659 /* The rest of sig_type must be filled in by the caller. */
6663 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6664 Fill in SIG_ENTRY with DWO_ENTRY. */
6667 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6668 struct signatured_type
*sig_entry
,
6669 struct dwo_unit
*dwo_entry
)
6671 /* Make sure we're not clobbering something we don't expect to. */
6672 gdb_assert (! sig_entry
->per_cu
.queued
);
6673 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6674 if (dwarf2_per_objfile
->using_index
)
6676 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6677 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6680 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6681 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6682 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6683 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6684 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6686 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6687 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6688 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6689 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6690 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6691 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6692 sig_entry
->dwo_unit
= dwo_entry
;
6695 /* Subroutine of lookup_signatured_type.
6696 If we haven't read the TU yet, create the signatured_type data structure
6697 for a TU to be read in directly from a DWO file, bypassing the stub.
6698 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6699 using .gdb_index, then when reading a CU we want to stay in the DWO file
6700 containing that CU. Otherwise we could end up reading several other DWO
6701 files (due to comdat folding) to process the transitive closure of all the
6702 mentioned TUs, and that can be slow. The current DWO file will have every
6703 type signature that it needs.
6704 We only do this for .gdb_index because in the psymtab case we already have
6705 to read all the DWOs to build the type unit groups. */
6707 static struct signatured_type
*
6708 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6710 struct dwarf2_per_objfile
*dwarf2_per_objfile
6711 = cu
->per_cu
->dwarf2_per_objfile
;
6712 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6713 struct dwo_file
*dwo_file
;
6714 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6715 struct signatured_type find_sig_entry
, *sig_entry
;
6718 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6720 /* If TU skeletons have been removed then we may not have read in any
6722 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6724 dwarf2_per_objfile
->signatured_types
6725 = allocate_signatured_type_table (objfile
);
6728 /* We only ever need to read in one copy of a signatured type.
6729 Use the global signatured_types array to do our own comdat-folding
6730 of types. If this is the first time we're reading this TU, and
6731 the TU has an entry in .gdb_index, replace the recorded data from
6732 .gdb_index with this TU. */
6734 find_sig_entry
.signature
= sig
;
6735 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6736 &find_sig_entry
, INSERT
);
6737 sig_entry
= (struct signatured_type
*) *slot
;
6739 /* We can get here with the TU already read, *or* in the process of being
6740 read. Don't reassign the global entry to point to this DWO if that's
6741 the case. Also note that if the TU is already being read, it may not
6742 have come from a DWO, the program may be a mix of Fission-compiled
6743 code and non-Fission-compiled code. */
6745 /* Have we already tried to read this TU?
6746 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6747 needn't exist in the global table yet). */
6748 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6751 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6752 dwo_unit of the TU itself. */
6753 dwo_file
= cu
->dwo_unit
->dwo_file
;
6755 /* Ok, this is the first time we're reading this TU. */
6756 if (dwo_file
->tus
== NULL
)
6758 find_dwo_entry
.signature
= sig
;
6759 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6761 if (dwo_entry
== NULL
)
6764 /* If the global table doesn't have an entry for this TU, add one. */
6765 if (sig_entry
== NULL
)
6766 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6768 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6769 sig_entry
->per_cu
.tu_read
= 1;
6773 /* Subroutine of lookup_signatured_type.
6774 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6775 then try the DWP file. If the TU stub (skeleton) has been removed then
6776 it won't be in .gdb_index. */
6778 static struct signatured_type
*
6779 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6781 struct dwarf2_per_objfile
*dwarf2_per_objfile
6782 = cu
->per_cu
->dwarf2_per_objfile
;
6783 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6784 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6785 struct dwo_unit
*dwo_entry
;
6786 struct signatured_type find_sig_entry
, *sig_entry
;
6789 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6790 gdb_assert (dwp_file
!= NULL
);
6792 /* If TU skeletons have been removed then we may not have read in any
6794 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6796 dwarf2_per_objfile
->signatured_types
6797 = allocate_signatured_type_table (objfile
);
6800 find_sig_entry
.signature
= sig
;
6801 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6802 &find_sig_entry
, INSERT
);
6803 sig_entry
= (struct signatured_type
*) *slot
;
6805 /* Have we already tried to read this TU?
6806 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6807 needn't exist in the global table yet). */
6808 if (sig_entry
!= NULL
)
6811 if (dwp_file
->tus
== NULL
)
6813 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6814 sig
, 1 /* is_debug_types */);
6815 if (dwo_entry
== NULL
)
6818 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6819 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6824 /* Lookup a signature based type for DW_FORM_ref_sig8.
6825 Returns NULL if signature SIG is not present in the table.
6826 It is up to the caller to complain about this. */
6828 static struct signatured_type
*
6829 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6831 struct dwarf2_per_objfile
*dwarf2_per_objfile
6832 = cu
->per_cu
->dwarf2_per_objfile
;
6835 && dwarf2_per_objfile
->using_index
)
6837 /* We're in a DWO/DWP file, and we're using .gdb_index.
6838 These cases require special processing. */
6839 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6840 return lookup_dwo_signatured_type (cu
, sig
);
6842 return lookup_dwp_signatured_type (cu
, sig
);
6846 struct signatured_type find_entry
, *entry
;
6848 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6850 find_entry
.signature
= sig
;
6851 entry
= ((struct signatured_type
*)
6852 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6858 /* Return the address base of the compile unit, which, if exists, is stored
6859 either at the attribute DW_AT_GNU_addr_base, or DW_AT_addr_base. */
6860 static gdb::optional
<ULONGEST
>
6861 lookup_addr_base (struct die_info
*comp_unit_die
)
6863 struct attribute
*attr
;
6864 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_addr_base
);
6865 if (attr
== nullptr)
6866 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_GNU_addr_base
);
6867 if (attr
== nullptr)
6868 return gdb::optional
<ULONGEST
> ();
6869 return DW_UNSND (attr
);
6872 /* Return range lists base of the compile unit, which, if exists, is stored
6873 either at the attribute DW_AT_rnglists_base or DW_AT_GNU_ranges_base. */
6875 lookup_ranges_base (struct die_info
*comp_unit_die
)
6877 struct attribute
*attr
;
6878 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_rnglists_base
);
6879 if (attr
== nullptr)
6880 attr
= dwarf2_attr_no_follow (comp_unit_die
, DW_AT_GNU_ranges_base
);
6881 if (attr
== nullptr)
6883 return DW_UNSND (attr
);
6886 /* Low level DIE reading support. */
6888 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6891 init_cu_die_reader (struct die_reader_specs
*reader
,
6892 struct dwarf2_cu
*cu
,
6893 struct dwarf2_section_info
*section
,
6894 struct dwo_file
*dwo_file
,
6895 struct abbrev_table
*abbrev_table
)
6897 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6898 reader
->abfd
= section
->get_bfd_owner ();
6900 reader
->dwo_file
= dwo_file
;
6901 reader
->die_section
= section
;
6902 reader
->buffer
= section
->buffer
;
6903 reader
->buffer_end
= section
->buffer
+ section
->size
;
6904 reader
->abbrev_table
= abbrev_table
;
6907 /* Subroutine of cutu_reader to simplify it.
6908 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6909 There's just a lot of work to do, and cutu_reader is big enough
6912 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6913 from it to the DIE in the DWO. If NULL we are skipping the stub.
6914 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6915 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6916 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6917 STUB_COMP_DIR may be non-NULL.
6918 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6919 are filled in with the info of the DIE from the DWO file.
6920 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6921 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6922 kept around for at least as long as *RESULT_READER.
6924 The result is non-zero if a valid (non-dummy) DIE was found. */
6927 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6928 struct dwo_unit
*dwo_unit
,
6929 struct die_info
*stub_comp_unit_die
,
6930 const char *stub_comp_dir
,
6931 struct die_reader_specs
*result_reader
,
6932 const gdb_byte
**result_info_ptr
,
6933 struct die_info
**result_comp_unit_die
,
6934 abbrev_table_up
*result_dwo_abbrev_table
)
6936 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6937 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6938 struct dwarf2_cu
*cu
= this_cu
->cu
;
6940 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6941 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6942 int i
,num_extra_attrs
;
6943 struct dwarf2_section_info
*dwo_abbrev_section
;
6944 struct die_info
*comp_unit_die
;
6946 /* At most one of these may be provided. */
6947 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6949 /* These attributes aren't processed until later:
6950 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6951 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6952 referenced later. However, these attributes are found in the stub
6953 which we won't have later. In order to not impose this complication
6954 on the rest of the code, we read them here and copy them to the
6963 if (stub_comp_unit_die
!= NULL
)
6965 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6967 if (! this_cu
->is_debug_types
)
6968 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6969 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6970 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6971 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6972 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6974 cu
->addr_base
= lookup_addr_base (stub_comp_unit_die
);
6976 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6977 here (if needed). We need the value before we can process
6979 cu
->ranges_base
= lookup_ranges_base (stub_comp_unit_die
);
6981 else if (stub_comp_dir
!= NULL
)
6983 /* Reconstruct the comp_dir attribute to simplify the code below. */
6984 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6985 comp_dir
->name
= DW_AT_comp_dir
;
6986 comp_dir
->form
= DW_FORM_string
;
6987 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6988 DW_STRING (comp_dir
) = stub_comp_dir
;
6991 /* Set up for reading the DWO CU/TU. */
6992 cu
->dwo_unit
= dwo_unit
;
6993 dwarf2_section_info
*section
= dwo_unit
->section
;
6994 section
->read (objfile
);
6995 abfd
= section
->get_bfd_owner ();
6996 begin_info_ptr
= info_ptr
= (section
->buffer
6997 + to_underlying (dwo_unit
->sect_off
));
6998 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7000 if (this_cu
->is_debug_types
)
7002 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7004 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7005 &cu
->header
, section
,
7007 info_ptr
, rcuh_kind::TYPE
);
7008 /* This is not an assert because it can be caused by bad debug info. */
7009 if (sig_type
->signature
!= cu
->header
.signature
)
7011 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7012 " TU at offset %s [in module %s]"),
7013 hex_string (sig_type
->signature
),
7014 hex_string (cu
->header
.signature
),
7015 sect_offset_str (dwo_unit
->sect_off
),
7016 bfd_get_filename (abfd
));
7018 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7019 /* For DWOs coming from DWP files, we don't know the CU length
7020 nor the type's offset in the TU until now. */
7021 dwo_unit
->length
= get_cu_length (&cu
->header
);
7022 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7024 /* Establish the type offset that can be used to lookup the type.
7025 For DWO files, we don't know it until now. */
7026 sig_type
->type_offset_in_section
7027 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7031 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7032 &cu
->header
, section
,
7034 info_ptr
, rcuh_kind::COMPILE
);
7035 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7036 /* For DWOs coming from DWP files, we don't know the CU length
7038 dwo_unit
->length
= get_cu_length (&cu
->header
);
7041 *result_dwo_abbrev_table
7042 = abbrev_table_read_table (objfile
, dwo_abbrev_section
,
7043 cu
->header
.abbrev_sect_off
);
7044 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7045 result_dwo_abbrev_table
->get ());
7047 /* Read in the die, but leave space to copy over the attributes
7048 from the stub. This has the benefit of simplifying the rest of
7049 the code - all the work to maintain the illusion of a single
7050 DW_TAG_{compile,type}_unit DIE is done here. */
7051 num_extra_attrs
= ((stmt_list
!= NULL
)
7055 + (comp_dir
!= NULL
));
7056 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7059 /* Copy over the attributes from the stub to the DIE we just read in. */
7060 comp_unit_die
= *result_comp_unit_die
;
7061 i
= comp_unit_die
->num_attrs
;
7062 if (stmt_list
!= NULL
)
7063 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7065 comp_unit_die
->attrs
[i
++] = *low_pc
;
7066 if (high_pc
!= NULL
)
7067 comp_unit_die
->attrs
[i
++] = *high_pc
;
7069 comp_unit_die
->attrs
[i
++] = *ranges
;
7070 if (comp_dir
!= NULL
)
7071 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7072 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7074 if (dwarf_die_debug
)
7076 fprintf_unfiltered (gdb_stdlog
,
7077 "Read die from %s@0x%x of %s:\n",
7078 section
->get_name (),
7079 (unsigned) (begin_info_ptr
- section
->buffer
),
7080 bfd_get_filename (abfd
));
7081 dump_die (comp_unit_die
, dwarf_die_debug
);
7084 /* Skip dummy compilation units. */
7085 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7086 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7089 *result_info_ptr
= info_ptr
;
7093 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
7094 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
7095 signature is part of the header. */
7096 static gdb::optional
<ULONGEST
>
7097 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
7099 if (cu
->header
.version
>= 5)
7100 return cu
->header
.signature
;
7101 struct attribute
*attr
;
7102 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7103 if (attr
== nullptr)
7104 return gdb::optional
<ULONGEST
> ();
7105 return DW_UNSND (attr
);
7108 /* Subroutine of cutu_reader to simplify it.
7109 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7110 Returns NULL if the specified DWO unit cannot be found. */
7112 static struct dwo_unit
*
7113 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7114 struct die_info
*comp_unit_die
,
7115 const char *dwo_name
)
7117 struct dwarf2_cu
*cu
= this_cu
->cu
;
7118 struct dwo_unit
*dwo_unit
;
7119 const char *comp_dir
;
7121 gdb_assert (cu
!= NULL
);
7123 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7124 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7125 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7127 if (this_cu
->is_debug_types
)
7129 struct signatured_type
*sig_type
;
7131 /* Since this_cu is the first member of struct signatured_type,
7132 we can go from a pointer to one to a pointer to the other. */
7133 sig_type
= (struct signatured_type
*) this_cu
;
7134 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7138 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7139 if (!signature
.has_value ())
7140 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7142 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7143 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7150 /* Subroutine of cutu_reader to simplify it.
7151 See it for a description of the parameters.
7152 Read a TU directly from a DWO file, bypassing the stub. */
7155 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7156 int use_existing_cu
, int keep
)
7158 struct signatured_type
*sig_type
;
7159 struct die_reader_specs reader
;
7161 /* Verify we can do the following downcast, and that we have the
7163 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7164 sig_type
= (struct signatured_type
*) this_cu
;
7165 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7167 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7169 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7170 /* There's no need to do the rereading_dwo_cu handling that
7171 cutu_reader does since we don't read the stub. */
7175 /* If !use_existing_cu, this_cu->cu must be NULL. */
7176 gdb_assert (this_cu
->cu
== NULL
);
7177 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7180 /* A future optimization, if needed, would be to use an existing
7181 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7182 could share abbrev tables. */
7184 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7185 NULL
/* stub_comp_unit_die */,
7186 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7189 &m_dwo_abbrev_table
) == 0)
7196 /* Initialize a CU (or TU) and read its DIEs.
7197 If the CU defers to a DWO file, read the DWO file as well.
7199 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7200 Otherwise the table specified in the comp unit header is read in and used.
7201 This is an optimization for when we already have the abbrev table.
7203 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7204 Otherwise, a new CU is allocated with xmalloc.
7206 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7207 read_in_chain. Otherwise the dwarf2_cu data is freed at the
7210 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7211 struct abbrev_table
*abbrev_table
,
7212 int use_existing_cu
, int keep
,
7214 : die_reader_specs
{},
7215 m_this_cu (this_cu
),
7218 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7219 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7220 struct dwarf2_section_info
*section
= this_cu
->section
;
7221 bfd
*abfd
= section
->get_bfd_owner ();
7222 struct dwarf2_cu
*cu
;
7223 const gdb_byte
*begin_info_ptr
;
7224 struct signatured_type
*sig_type
= NULL
;
7225 struct dwarf2_section_info
*abbrev_section
;
7226 /* Non-zero if CU currently points to a DWO file and we need to
7227 reread it. When this happens we need to reread the skeleton die
7228 before we can reread the DWO file (this only applies to CUs, not TUs). */
7229 int rereading_dwo_cu
= 0;
7231 if (dwarf_die_debug
)
7232 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7233 this_cu
->is_debug_types
? "type" : "comp",
7234 sect_offset_str (this_cu
->sect_off
));
7236 if (use_existing_cu
)
7239 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7240 file (instead of going through the stub), short-circuit all of this. */
7241 if (this_cu
->reading_dwo_directly
)
7243 /* Narrow down the scope of possibilities to have to understand. */
7244 gdb_assert (this_cu
->is_debug_types
);
7245 gdb_assert (abbrev_table
== NULL
);
7246 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
);
7250 /* This is cheap if the section is already read in. */
7251 section
->read (objfile
);
7253 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7255 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7257 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7260 /* If this CU is from a DWO file we need to start over, we need to
7261 refetch the attributes from the skeleton CU.
7262 This could be optimized by retrieving those attributes from when we
7263 were here the first time: the previous comp_unit_die was stored in
7264 comp_unit_obstack. But there's no data yet that we need this
7266 if (cu
->dwo_unit
!= NULL
)
7267 rereading_dwo_cu
= 1;
7271 /* If !use_existing_cu, this_cu->cu must be NULL. */
7272 gdb_assert (this_cu
->cu
== NULL
);
7273 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7274 cu
= m_new_cu
.get ();
7277 /* Get the header. */
7278 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7280 /* We already have the header, there's no need to read it in again. */
7281 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7285 if (this_cu
->is_debug_types
)
7287 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7288 &cu
->header
, section
,
7289 abbrev_section
, info_ptr
,
7292 /* Since per_cu is the first member of struct signatured_type,
7293 we can go from a pointer to one to a pointer to the other. */
7294 sig_type
= (struct signatured_type
*) this_cu
;
7295 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7296 gdb_assert (sig_type
->type_offset_in_tu
7297 == cu
->header
.type_cu_offset_in_tu
);
7298 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7300 /* LENGTH has not been set yet for type units if we're
7301 using .gdb_index. */
7302 this_cu
->length
= get_cu_length (&cu
->header
);
7304 /* Establish the type offset that can be used to lookup the type. */
7305 sig_type
->type_offset_in_section
=
7306 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7308 this_cu
->dwarf_version
= cu
->header
.version
;
7312 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7313 &cu
->header
, section
,
7316 rcuh_kind::COMPILE
);
7318 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7319 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7320 this_cu
->dwarf_version
= cu
->header
.version
;
7324 /* Skip dummy compilation units. */
7325 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7326 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7332 /* If we don't have them yet, read the abbrevs for this compilation unit.
7333 And if we need to read them now, make sure they're freed when we're
7335 if (abbrev_table
!= NULL
)
7336 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7339 m_abbrev_table_holder
7340 = abbrev_table_read_table (objfile
, abbrev_section
,
7341 cu
->header
.abbrev_sect_off
);
7342 abbrev_table
= m_abbrev_table_holder
.get ();
7345 /* Read the top level CU/TU die. */
7346 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7347 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7349 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7355 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7356 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7357 table from the DWO file and pass the ownership over to us. It will be
7358 referenced from READER, so we must make sure to free it after we're done
7361 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7362 DWO CU, that this test will fail (the attribute will not be present). */
7363 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7364 if (dwo_name
!= nullptr)
7366 struct dwo_unit
*dwo_unit
;
7367 struct die_info
*dwo_comp_unit_die
;
7369 if (comp_unit_die
->has_children
)
7371 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7372 " has children (offset %s) [in module %s]"),
7373 sect_offset_str (this_cu
->sect_off
),
7374 bfd_get_filename (abfd
));
7376 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
7377 if (dwo_unit
!= NULL
)
7379 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7380 comp_unit_die
, NULL
,
7383 &m_dwo_abbrev_table
) == 0)
7389 comp_unit_die
= dwo_comp_unit_die
;
7393 /* Yikes, we couldn't find the rest of the DIE, we only have
7394 the stub. A complaint has already been logged. There's
7395 not much more we can do except pass on the stub DIE to
7396 die_reader_func. We don't want to throw an error on bad
7402 cutu_reader::~cutu_reader ()
7404 /* Done, clean up. */
7405 if (m_new_cu
!= NULL
&& m_keep
&& !dummy_p
)
7407 struct dwarf2_per_objfile
*dwarf2_per_objfile
7408 = m_this_cu
->dwarf2_per_objfile
;
7409 /* Link this CU into read_in_chain. */
7410 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7411 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7412 /* The chain owns it now. */
7413 m_new_cu
.release ();
7417 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7418 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7419 assumed to have already done the lookup to find the DWO file).
7421 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7422 THIS_CU->is_debug_types, but nothing else.
7424 We fill in THIS_CU->length.
7426 THIS_CU->cu is always freed when done.
7427 This is done in order to not leave THIS_CU->cu in a state where we have
7428 to care whether it refers to the "main" CU or the DWO CU.
7430 When parent_cu is passed, it is used to provide a default value for
7431 str_offsets_base and addr_base from the parent. */
7433 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7434 struct dwarf2_cu
*parent_cu
,
7435 struct dwo_file
*dwo_file
)
7436 : die_reader_specs
{},
7439 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7440 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7441 struct dwarf2_section_info
*section
= this_cu
->section
;
7442 bfd
*abfd
= section
->get_bfd_owner ();
7443 struct dwarf2_section_info
*abbrev_section
;
7444 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7446 if (dwarf_die_debug
)
7447 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7448 this_cu
->is_debug_types
? "type" : "comp",
7449 sect_offset_str (this_cu
->sect_off
));
7451 gdb_assert (this_cu
->cu
== NULL
);
7453 abbrev_section
= (dwo_file
!= NULL
7454 ? &dwo_file
->sections
.abbrev
7455 : get_abbrev_section_for_cu (this_cu
));
7457 /* This is cheap if the section is already read in. */
7458 section
->read (objfile
);
7460 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7462 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7463 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7464 &m_new_cu
->header
, section
,
7465 abbrev_section
, info_ptr
,
7466 (this_cu
->is_debug_types
7468 : rcuh_kind::COMPILE
));
7470 if (parent_cu
!= nullptr)
7472 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7473 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7475 this_cu
->length
= get_cu_length (&m_new_cu
->header
);
7477 /* Skip dummy compilation units. */
7478 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7479 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7485 m_abbrev_table_holder
7486 = abbrev_table_read_table (objfile
, abbrev_section
,
7487 m_new_cu
->header
.abbrev_sect_off
);
7489 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7490 m_abbrev_table_holder
.get ());
7491 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7495 /* Type Unit Groups.
7497 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7498 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7499 so that all types coming from the same compilation (.o file) are grouped
7500 together. A future step could be to put the types in the same symtab as
7501 the CU the types ultimately came from. */
7504 hash_type_unit_group (const void *item
)
7506 const struct type_unit_group
*tu_group
7507 = (const struct type_unit_group
*) item
;
7509 return hash_stmt_list_entry (&tu_group
->hash
);
7513 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7515 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7516 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7518 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7521 /* Allocate a hash table for type unit groups. */
7524 allocate_type_unit_groups_table (struct objfile
*objfile
)
7526 return htab_create_alloc_ex (3,
7527 hash_type_unit_group
,
7530 &objfile
->objfile_obstack
,
7531 hashtab_obstack_allocate
,
7532 dummy_obstack_deallocate
);
7535 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7536 partial symtabs. We combine several TUs per psymtab to not let the size
7537 of any one psymtab grow too big. */
7538 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7539 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7541 /* Helper routine for get_type_unit_group.
7542 Create the type_unit_group object used to hold one or more TUs. */
7544 static struct type_unit_group
*
7545 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7547 struct dwarf2_per_objfile
*dwarf2_per_objfile
7548 = cu
->per_cu
->dwarf2_per_objfile
;
7549 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7550 struct dwarf2_per_cu_data
*per_cu
;
7551 struct type_unit_group
*tu_group
;
7553 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7554 struct type_unit_group
);
7555 per_cu
= &tu_group
->per_cu
;
7556 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7558 if (dwarf2_per_objfile
->using_index
)
7560 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7561 struct dwarf2_per_cu_quick_data
);
7565 unsigned int line_offset
= to_underlying (line_offset_struct
);
7566 dwarf2_psymtab
*pst
;
7569 /* Give the symtab a useful name for debug purposes. */
7570 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7571 name
= string_printf ("<type_units_%d>",
7572 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7574 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7576 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7577 pst
->anonymous
= true;
7580 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7581 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7586 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7587 STMT_LIST is a DW_AT_stmt_list attribute. */
7589 static struct type_unit_group
*
7590 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7592 struct dwarf2_per_objfile
*dwarf2_per_objfile
7593 = cu
->per_cu
->dwarf2_per_objfile
;
7594 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7595 struct type_unit_group
*tu_group
;
7597 unsigned int line_offset
;
7598 struct type_unit_group type_unit_group_for_lookup
;
7600 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7602 dwarf2_per_objfile
->type_unit_groups
=
7603 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7606 /* Do we need to create a new group, or can we use an existing one? */
7610 line_offset
= DW_UNSND (stmt_list
);
7611 ++tu_stats
->nr_symtab_sharers
;
7615 /* Ugh, no stmt_list. Rare, but we have to handle it.
7616 We can do various things here like create one group per TU or
7617 spread them over multiple groups to split up the expansion work.
7618 To avoid worst case scenarios (too many groups or too large groups)
7619 we, umm, group them in bunches. */
7620 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7621 | (tu_stats
->nr_stmt_less_type_units
7622 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7623 ++tu_stats
->nr_stmt_less_type_units
;
7626 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7627 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7628 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7629 &type_unit_group_for_lookup
, INSERT
);
7632 tu_group
= (struct type_unit_group
*) *slot
;
7633 gdb_assert (tu_group
!= NULL
);
7637 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7638 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7640 ++tu_stats
->nr_symtabs
;
7646 /* Partial symbol tables. */
7648 /* Create a psymtab named NAME and assign it to PER_CU.
7650 The caller must fill in the following details:
7651 dirname, textlow, texthigh. */
7653 static dwarf2_psymtab
*
7654 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7656 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7657 dwarf2_psymtab
*pst
;
7659 pst
= new dwarf2_psymtab (name
, objfile
, 0);
7661 pst
->psymtabs_addrmap_supported
= true;
7663 /* This is the glue that links PST into GDB's symbol API. */
7664 pst
->per_cu_data
= per_cu
;
7665 per_cu
->v
.psymtab
= pst
;
7670 /* DIE reader function for process_psymtab_comp_unit. */
7673 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7674 const gdb_byte
*info_ptr
,
7675 struct die_info
*comp_unit_die
,
7676 int want_partial_unit
,
7677 enum language pretend_language
)
7679 struct dwarf2_cu
*cu
= reader
->cu
;
7680 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7681 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7682 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7684 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7685 dwarf2_psymtab
*pst
;
7686 enum pc_bounds_kind cu_bounds_kind
;
7687 const char *filename
;
7689 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !want_partial_unit
)
7692 gdb_assert (! per_cu
->is_debug_types
);
7694 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7696 /* Allocate a new partial symbol table structure. */
7697 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7698 if (filename
== NULL
)
7701 pst
= create_partial_symtab (per_cu
, filename
);
7703 /* This must be done before calling dwarf2_build_include_psymtabs. */
7704 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7706 baseaddr
= objfile
->text_section_offset ();
7708 dwarf2_find_base_address (comp_unit_die
, cu
);
7710 /* Possibly set the default values of LOWPC and HIGHPC from
7712 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7713 &best_highpc
, cu
, pst
);
7714 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7717 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7720 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7722 /* Store the contiguous range if it is not empty; it can be
7723 empty for CUs with no code. */
7724 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7728 /* Check if comp unit has_children.
7729 If so, read the rest of the partial symbols from this comp unit.
7730 If not, there's no more debug_info for this comp unit. */
7731 if (comp_unit_die
->has_children
)
7733 struct partial_die_info
*first_die
;
7734 CORE_ADDR lowpc
, highpc
;
7736 lowpc
= ((CORE_ADDR
) -1);
7737 highpc
= ((CORE_ADDR
) 0);
7739 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7741 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7742 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7744 /* If we didn't find a lowpc, set it to highpc to avoid
7745 complaints from `maint check'. */
7746 if (lowpc
== ((CORE_ADDR
) -1))
7749 /* If the compilation unit didn't have an explicit address range,
7750 then use the information extracted from its child dies. */
7751 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7754 best_highpc
= highpc
;
7757 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7758 best_lowpc
+ baseaddr
)
7760 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7761 best_highpc
+ baseaddr
)
7764 end_psymtab_common (objfile
, pst
);
7766 if (!cu
->per_cu
->imported_symtabs_empty ())
7769 int len
= cu
->per_cu
->imported_symtabs_size ();
7771 /* Fill in 'dependencies' here; we fill in 'users' in a
7773 pst
->number_of_dependencies
= len
;
7775 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7776 for (i
= 0; i
< len
; ++i
)
7778 pst
->dependencies
[i
]
7779 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7782 cu
->per_cu
->imported_symtabs_free ();
7785 /* Get the list of files included in the current compilation unit,
7786 and build a psymtab for each of them. */
7787 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7789 if (dwarf_read_debug
)
7790 fprintf_unfiltered (gdb_stdlog
,
7791 "Psymtab for %s unit @%s: %s - %s"
7792 ", %d global, %d static syms\n",
7793 per_cu
->is_debug_types
? "type" : "comp",
7794 sect_offset_str (per_cu
->sect_off
),
7795 paddress (gdbarch
, pst
->text_low (objfile
)),
7796 paddress (gdbarch
, pst
->text_high (objfile
)),
7797 pst
->n_global_syms
, pst
->n_static_syms
);
7800 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7801 Process compilation unit THIS_CU for a psymtab. */
7804 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7805 int want_partial_unit
,
7806 enum language pretend_language
)
7808 /* If this compilation unit was already read in, free the
7809 cached copy in order to read it in again. This is
7810 necessary because we skipped some symbols when we first
7811 read in the compilation unit (see load_partial_dies).
7812 This problem could be avoided, but the benefit is unclear. */
7813 if (this_cu
->cu
!= NULL
)
7814 free_one_cached_comp_unit (this_cu
);
7816 cutu_reader
reader (this_cu
, NULL
, 0, 0, false);
7822 else if (this_cu
->is_debug_types
)
7823 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7824 reader
.comp_unit_die
);
7826 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7827 reader
.comp_unit_die
,
7831 /* Age out any secondary CUs. */
7832 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7835 /* Reader function for build_type_psymtabs. */
7838 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7839 const gdb_byte
*info_ptr
,
7840 struct die_info
*type_unit_die
)
7842 struct dwarf2_per_objfile
*dwarf2_per_objfile
7843 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7844 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7845 struct dwarf2_cu
*cu
= reader
->cu
;
7846 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7847 struct signatured_type
*sig_type
;
7848 struct type_unit_group
*tu_group
;
7849 struct attribute
*attr
;
7850 struct partial_die_info
*first_die
;
7851 CORE_ADDR lowpc
, highpc
;
7852 dwarf2_psymtab
*pst
;
7854 gdb_assert (per_cu
->is_debug_types
);
7855 sig_type
= (struct signatured_type
*) per_cu
;
7857 if (! type_unit_die
->has_children
)
7860 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
7861 tu_group
= get_type_unit_group (cu
, attr
);
7863 if (tu_group
->tus
== nullptr)
7864 tu_group
->tus
= new std::vector
<signatured_type
*>;
7865 tu_group
->tus
->push_back (sig_type
);
7867 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7868 pst
= create_partial_symtab (per_cu
, "");
7869 pst
->anonymous
= true;
7871 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7873 lowpc
= (CORE_ADDR
) -1;
7874 highpc
= (CORE_ADDR
) 0;
7875 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7877 end_psymtab_common (objfile
, pst
);
7880 /* Struct used to sort TUs by their abbreviation table offset. */
7882 struct tu_abbrev_offset
7884 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7885 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7888 signatured_type
*sig_type
;
7889 sect_offset abbrev_offset
;
7892 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7895 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7896 const struct tu_abbrev_offset
&b
)
7898 return a
.abbrev_offset
< b
.abbrev_offset
;
7901 /* Efficiently read all the type units.
7902 This does the bulk of the work for build_type_psymtabs.
7904 The efficiency is because we sort TUs by the abbrev table they use and
7905 only read each abbrev table once. In one program there are 200K TUs
7906 sharing 8K abbrev tables.
7908 The main purpose of this function is to support building the
7909 dwarf2_per_objfile->type_unit_groups table.
7910 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7911 can collapse the search space by grouping them by stmt_list.
7912 The savings can be significant, in the same program from above the 200K TUs
7913 share 8K stmt_list tables.
7915 FUNC is expected to call get_type_unit_group, which will create the
7916 struct type_unit_group if necessary and add it to
7917 dwarf2_per_objfile->type_unit_groups. */
7920 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7922 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7923 abbrev_table_up abbrev_table
;
7924 sect_offset abbrev_offset
;
7926 /* It's up to the caller to not call us multiple times. */
7927 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7929 if (dwarf2_per_objfile
->all_type_units
.empty ())
7932 /* TUs typically share abbrev tables, and there can be way more TUs than
7933 abbrev tables. Sort by abbrev table to reduce the number of times we
7934 read each abbrev table in.
7935 Alternatives are to punt or to maintain a cache of abbrev tables.
7936 This is simpler and efficient enough for now.
7938 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7939 symtab to use). Typically TUs with the same abbrev offset have the same
7940 stmt_list value too so in practice this should work well.
7942 The basic algorithm here is:
7944 sort TUs by abbrev table
7945 for each TU with same abbrev table:
7946 read abbrev table if first user
7947 read TU top level DIE
7948 [IWBN if DWO skeletons had DW_AT_stmt_list]
7951 if (dwarf_read_debug
)
7952 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7954 /* Sort in a separate table to maintain the order of all_type_units
7955 for .gdb_index: TU indices directly index all_type_units. */
7956 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7957 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7959 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7960 sorted_by_abbrev
.emplace_back
7961 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7962 sig_type
->per_cu
.section
,
7963 sig_type
->per_cu
.sect_off
));
7965 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7966 sort_tu_by_abbrev_offset
);
7968 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7970 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7972 /* Switch to the next abbrev table if necessary. */
7973 if (abbrev_table
== NULL
7974 || tu
.abbrev_offset
!= abbrev_offset
)
7976 abbrev_offset
= tu
.abbrev_offset
;
7978 abbrev_table_read_table (dwarf2_per_objfile
->objfile
,
7979 &dwarf2_per_objfile
->abbrev
,
7981 ++tu_stats
->nr_uniq_abbrev_tables
;
7984 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7986 if (!reader
.dummy_p
)
7987 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7988 reader
.comp_unit_die
);
7992 /* Print collected type unit statistics. */
7995 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7997 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7999 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8000 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8001 dwarf2_per_objfile
->all_type_units
.size ());
8002 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8003 tu_stats
->nr_uniq_abbrev_tables
);
8004 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8005 tu_stats
->nr_symtabs
);
8006 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8007 tu_stats
->nr_symtab_sharers
);
8008 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8009 tu_stats
->nr_stmt_less_type_units
);
8010 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8011 tu_stats
->nr_all_type_units_reallocs
);
8014 /* Traversal function for build_type_psymtabs. */
8017 build_type_psymtab_dependencies (void **slot
, void *info
)
8019 struct dwarf2_per_objfile
*dwarf2_per_objfile
8020 = (struct dwarf2_per_objfile
*) info
;
8021 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8022 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8023 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8024 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8025 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
8028 gdb_assert (len
> 0);
8029 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8031 pst
->number_of_dependencies
= len
;
8032 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8033 for (i
= 0; i
< len
; ++i
)
8035 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
8036 gdb_assert (iter
->per_cu
.is_debug_types
);
8037 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8038 iter
->type_unit_group
= tu_group
;
8041 delete tu_group
->tus
;
8042 tu_group
->tus
= nullptr;
8047 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8048 Build partial symbol tables for the .debug_types comp-units. */
8051 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8053 if (! create_all_type_units (dwarf2_per_objfile
))
8056 build_type_psymtabs_1 (dwarf2_per_objfile
);
8059 /* Traversal function for process_skeletonless_type_unit.
8060 Read a TU in a DWO file and build partial symbols for it. */
8063 process_skeletonless_type_unit (void **slot
, void *info
)
8065 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8066 struct dwarf2_per_objfile
*dwarf2_per_objfile
8067 = (struct dwarf2_per_objfile
*) info
;
8068 struct signatured_type find_entry
, *entry
;
8070 /* If this TU doesn't exist in the global table, add it and read it in. */
8072 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8074 dwarf2_per_objfile
->signatured_types
8075 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8078 find_entry
.signature
= dwo_unit
->signature
;
8079 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
8080 &find_entry
, INSERT
);
8081 /* If we've already seen this type there's nothing to do. What's happening
8082 is we're doing our own version of comdat-folding here. */
8086 /* This does the job that create_all_type_units would have done for
8088 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8089 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8092 /* This does the job that build_type_psymtabs_1 would have done. */
8093 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, 0, false);
8094 if (!reader
.dummy_p
)
8095 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
8096 reader
.comp_unit_die
);
8101 /* Traversal function for process_skeletonless_type_units. */
8104 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8106 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8108 if (dwo_file
->tus
!= NULL
)
8109 htab_traverse_noresize (dwo_file
->tus
.get (),
8110 process_skeletonless_type_unit
, info
);
8115 /* Scan all TUs of DWO files, verifying we've processed them.
8116 This is needed in case a TU was emitted without its skeleton.
8117 Note: This can't be done until we know what all the DWO files are. */
8120 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8122 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8123 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8124 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8126 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
8127 process_dwo_file_for_skeletonless_type_units
,
8128 dwarf2_per_objfile
);
8132 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8135 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8137 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8139 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8144 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8146 /* Set the 'user' field only if it is not already set. */
8147 if (pst
->dependencies
[j
]->user
== NULL
)
8148 pst
->dependencies
[j
]->user
= pst
;
8153 /* Build the partial symbol table by doing a quick pass through the
8154 .debug_info and .debug_abbrev sections. */
8157 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8159 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8161 if (dwarf_read_debug
)
8163 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8164 objfile_name (objfile
));
8167 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8169 dwarf2_per_objfile
->info
.read (objfile
);
8171 /* Any cached compilation units will be linked by the per-objfile
8172 read_in_chain. Make sure to free them when we're done. */
8173 free_cached_comp_units
freer (dwarf2_per_objfile
);
8175 build_type_psymtabs (dwarf2_per_objfile
);
8177 create_all_comp_units (dwarf2_per_objfile
);
8179 /* Create a temporary address map on a temporary obstack. We later
8180 copy this to the final obstack. */
8181 auto_obstack temp_obstack
;
8183 scoped_restore save_psymtabs_addrmap
8184 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8185 addrmap_create_mutable (&temp_obstack
));
8187 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8188 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8190 /* This has to wait until we read the CUs, we need the list of DWOs. */
8191 process_skeletonless_type_units (dwarf2_per_objfile
);
8193 /* Now that all TUs have been processed we can fill in the dependencies. */
8194 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8196 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8197 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8200 if (dwarf_read_debug
)
8201 print_tu_stats (dwarf2_per_objfile
);
8203 set_partial_user (dwarf2_per_objfile
);
8205 objfile
->partial_symtabs
->psymtabs_addrmap
8206 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8207 objfile
->partial_symtabs
->obstack ());
8208 /* At this point we want to keep the address map. */
8209 save_psymtabs_addrmap
.release ();
8211 if (dwarf_read_debug
)
8212 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8213 objfile_name (objfile
));
8216 /* Load the partial DIEs for a secondary CU into memory.
8217 This is also used when rereading a primary CU with load_all_dies. */
8220 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8222 cutu_reader
reader (this_cu
, NULL
, 1, 1, false);
8224 if (!reader
.dummy_p
)
8226 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
8229 /* Check if comp unit has_children.
8230 If so, read the rest of the partial symbols from this comp unit.
8231 If not, there's no more debug_info for this comp unit. */
8232 if (reader
.comp_unit_die
->has_children
)
8233 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8238 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8239 struct dwarf2_section_info
*section
,
8240 struct dwarf2_section_info
*abbrev_section
,
8241 unsigned int is_dwz
)
8243 const gdb_byte
*info_ptr
;
8244 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8246 if (dwarf_read_debug
)
8247 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8248 section
->get_name (),
8249 section
->get_file_name ());
8251 section
->read (objfile
);
8253 info_ptr
= section
->buffer
;
8255 while (info_ptr
< section
->buffer
+ section
->size
)
8257 struct dwarf2_per_cu_data
*this_cu
;
8259 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8261 comp_unit_head cu_header
;
8262 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8263 abbrev_section
, info_ptr
,
8264 rcuh_kind::COMPILE
);
8266 /* Save the compilation unit for later lookup. */
8267 if (cu_header
.unit_type
!= DW_UT_type
)
8269 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8270 struct dwarf2_per_cu_data
);
8271 memset (this_cu
, 0, sizeof (*this_cu
));
8275 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8276 struct signatured_type
);
8277 memset (sig_type
, 0, sizeof (*sig_type
));
8278 sig_type
->signature
= cu_header
.signature
;
8279 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8280 this_cu
= &sig_type
->per_cu
;
8282 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8283 this_cu
->sect_off
= sect_off
;
8284 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8285 this_cu
->is_dwz
= is_dwz
;
8286 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8287 this_cu
->section
= section
;
8289 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8291 info_ptr
= info_ptr
+ this_cu
->length
;
8295 /* Create a list of all compilation units in OBJFILE.
8296 This is only done for -readnow and building partial symtabs. */
8299 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8301 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8302 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8303 &dwarf2_per_objfile
->abbrev
, 0);
8305 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8307 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8311 /* Process all loaded DIEs for compilation unit CU, starting at
8312 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8313 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8314 DW_AT_ranges). See the comments of add_partial_subprogram on how
8315 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8318 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8319 CORE_ADDR
*highpc
, int set_addrmap
,
8320 struct dwarf2_cu
*cu
)
8322 struct partial_die_info
*pdi
;
8324 /* Now, march along the PDI's, descending into ones which have
8325 interesting children but skipping the children of the other ones,
8326 until we reach the end of the compilation unit. */
8334 /* Anonymous namespaces or modules have no name but have interesting
8335 children, so we need to look at them. Ditto for anonymous
8338 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8339 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8340 || pdi
->tag
== DW_TAG_imported_unit
8341 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8345 case DW_TAG_subprogram
:
8346 case DW_TAG_inlined_subroutine
:
8347 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8349 case DW_TAG_constant
:
8350 case DW_TAG_variable
:
8351 case DW_TAG_typedef
:
8352 case DW_TAG_union_type
:
8353 if (!pdi
->is_declaration
)
8355 add_partial_symbol (pdi
, cu
);
8358 case DW_TAG_class_type
:
8359 case DW_TAG_interface_type
:
8360 case DW_TAG_structure_type
:
8361 if (!pdi
->is_declaration
)
8363 add_partial_symbol (pdi
, cu
);
8365 if ((cu
->language
== language_rust
8366 || cu
->language
== language_cplus
) && pdi
->has_children
)
8367 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8370 case DW_TAG_enumeration_type
:
8371 if (!pdi
->is_declaration
)
8372 add_partial_enumeration (pdi
, cu
);
8374 case DW_TAG_base_type
:
8375 case DW_TAG_subrange_type
:
8376 /* File scope base type definitions are added to the partial
8378 add_partial_symbol (pdi
, cu
);
8380 case DW_TAG_namespace
:
8381 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8384 if (!pdi
->is_declaration
)
8385 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8387 case DW_TAG_imported_unit
:
8389 struct dwarf2_per_cu_data
*per_cu
;
8391 /* For now we don't handle imported units in type units. */
8392 if (cu
->per_cu
->is_debug_types
)
8394 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8395 " supported in type units [in module %s]"),
8396 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8399 per_cu
= dwarf2_find_containing_comp_unit
8400 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8401 cu
->per_cu
->dwarf2_per_objfile
);
8403 /* Go read the partial unit, if needed. */
8404 if (per_cu
->v
.psymtab
== NULL
)
8405 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8407 cu
->per_cu
->imported_symtabs_push (per_cu
);
8410 case DW_TAG_imported_declaration
:
8411 add_partial_symbol (pdi
, cu
);
8418 /* If the die has a sibling, skip to the sibling. */
8420 pdi
= pdi
->die_sibling
;
8424 /* Functions used to compute the fully scoped name of a partial DIE.
8426 Normally, this is simple. For C++, the parent DIE's fully scoped
8427 name is concatenated with "::" and the partial DIE's name.
8428 Enumerators are an exception; they use the scope of their parent
8429 enumeration type, i.e. the name of the enumeration type is not
8430 prepended to the enumerator.
8432 There are two complexities. One is DW_AT_specification; in this
8433 case "parent" means the parent of the target of the specification,
8434 instead of the direct parent of the DIE. The other is compilers
8435 which do not emit DW_TAG_namespace; in this case we try to guess
8436 the fully qualified name of structure types from their members'
8437 linkage names. This must be done using the DIE's children rather
8438 than the children of any DW_AT_specification target. We only need
8439 to do this for structures at the top level, i.e. if the target of
8440 any DW_AT_specification (if any; otherwise the DIE itself) does not
8443 /* Compute the scope prefix associated with PDI's parent, in
8444 compilation unit CU. The result will be allocated on CU's
8445 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8446 field. NULL is returned if no prefix is necessary. */
8448 partial_die_parent_scope (struct partial_die_info
*pdi
,
8449 struct dwarf2_cu
*cu
)
8451 const char *grandparent_scope
;
8452 struct partial_die_info
*parent
, *real_pdi
;
8454 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8455 then this means the parent of the specification DIE. */
8458 while (real_pdi
->has_specification
)
8460 auto res
= find_partial_die (real_pdi
->spec_offset
,
8461 real_pdi
->spec_is_dwz
, cu
);
8466 parent
= real_pdi
->die_parent
;
8470 if (parent
->scope_set
)
8471 return parent
->scope
;
8475 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8477 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8478 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8479 Work around this problem here. */
8480 if (cu
->language
== language_cplus
8481 && parent
->tag
== DW_TAG_namespace
8482 && strcmp (parent
->name
, "::") == 0
8483 && grandparent_scope
== NULL
)
8485 parent
->scope
= NULL
;
8486 parent
->scope_set
= 1;
8490 /* Nested subroutines in Fortran get a prefix. */
8491 if (pdi
->tag
== DW_TAG_enumerator
)
8492 /* Enumerators should not get the name of the enumeration as a prefix. */
8493 parent
->scope
= grandparent_scope
;
8494 else if (parent
->tag
== DW_TAG_namespace
8495 || parent
->tag
== DW_TAG_module
8496 || parent
->tag
== DW_TAG_structure_type
8497 || parent
->tag
== DW_TAG_class_type
8498 || parent
->tag
== DW_TAG_interface_type
8499 || parent
->tag
== DW_TAG_union_type
8500 || parent
->tag
== DW_TAG_enumeration_type
8501 || (cu
->language
== language_fortran
8502 && parent
->tag
== DW_TAG_subprogram
8503 && pdi
->tag
== DW_TAG_subprogram
))
8505 if (grandparent_scope
== NULL
)
8506 parent
->scope
= parent
->name
;
8508 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8510 parent
->name
, 0, cu
);
8514 /* FIXME drow/2004-04-01: What should we be doing with
8515 function-local names? For partial symbols, we should probably be
8517 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8518 dwarf_tag_name (parent
->tag
),
8519 sect_offset_str (pdi
->sect_off
));
8520 parent
->scope
= grandparent_scope
;
8523 parent
->scope_set
= 1;
8524 return parent
->scope
;
8527 /* Return the fully scoped name associated with PDI, from compilation unit
8528 CU. The result will be allocated with malloc. */
8530 static gdb::unique_xmalloc_ptr
<char>
8531 partial_die_full_name (struct partial_die_info
*pdi
,
8532 struct dwarf2_cu
*cu
)
8534 const char *parent_scope
;
8536 /* If this is a template instantiation, we can not work out the
8537 template arguments from partial DIEs. So, unfortunately, we have
8538 to go through the full DIEs. At least any work we do building
8539 types here will be reused if full symbols are loaded later. */
8540 if (pdi
->has_template_arguments
)
8544 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8546 struct die_info
*die
;
8547 struct attribute attr
;
8548 struct dwarf2_cu
*ref_cu
= cu
;
8550 /* DW_FORM_ref_addr is using section offset. */
8551 attr
.name
= (enum dwarf_attribute
) 0;
8552 attr
.form
= DW_FORM_ref_addr
;
8553 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8554 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8556 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8560 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8561 if (parent_scope
== NULL
)
8564 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8569 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8571 struct dwarf2_per_objfile
*dwarf2_per_objfile
8572 = cu
->per_cu
->dwarf2_per_objfile
;
8573 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8574 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8576 const char *actual_name
= NULL
;
8579 baseaddr
= objfile
->text_section_offset ();
8581 gdb::unique_xmalloc_ptr
<char> built_actual_name
8582 = partial_die_full_name (pdi
, cu
);
8583 if (built_actual_name
!= NULL
)
8584 actual_name
= built_actual_name
.get ();
8586 if (actual_name
== NULL
)
8587 actual_name
= pdi
->name
;
8591 case DW_TAG_inlined_subroutine
:
8592 case DW_TAG_subprogram
:
8593 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8595 if (pdi
->is_external
8596 || cu
->language
== language_ada
8597 || (cu
->language
== language_fortran
8598 && pdi
->die_parent
!= NULL
8599 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8601 /* Normally, only "external" DIEs are part of the global scope.
8602 But in Ada and Fortran, we want to be able to access nested
8603 procedures globally. So all Ada and Fortran subprograms are
8604 stored in the global scope. */
8605 add_psymbol_to_list (actual_name
,
8606 built_actual_name
!= NULL
,
8607 VAR_DOMAIN
, LOC_BLOCK
,
8608 SECT_OFF_TEXT (objfile
),
8609 psymbol_placement::GLOBAL
,
8611 cu
->language
, objfile
);
8615 add_psymbol_to_list (actual_name
,
8616 built_actual_name
!= NULL
,
8617 VAR_DOMAIN
, LOC_BLOCK
,
8618 SECT_OFF_TEXT (objfile
),
8619 psymbol_placement::STATIC
,
8620 addr
, cu
->language
, objfile
);
8623 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8624 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8626 case DW_TAG_constant
:
8627 add_psymbol_to_list (actual_name
,
8628 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8629 -1, (pdi
->is_external
8630 ? psymbol_placement::GLOBAL
8631 : psymbol_placement::STATIC
),
8632 0, cu
->language
, objfile
);
8634 case DW_TAG_variable
:
8636 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8640 && !dwarf2_per_objfile
->has_section_at_zero
)
8642 /* A global or static variable may also have been stripped
8643 out by the linker if unused, in which case its address
8644 will be nullified; do not add such variables into partial
8645 symbol table then. */
8647 else if (pdi
->is_external
)
8650 Don't enter into the minimal symbol tables as there is
8651 a minimal symbol table entry from the ELF symbols already.
8652 Enter into partial symbol table if it has a location
8653 descriptor or a type.
8654 If the location descriptor is missing, new_symbol will create
8655 a LOC_UNRESOLVED symbol, the address of the variable will then
8656 be determined from the minimal symbol table whenever the variable
8658 The address for the partial symbol table entry is not
8659 used by GDB, but it comes in handy for debugging partial symbol
8662 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8663 add_psymbol_to_list (actual_name
,
8664 built_actual_name
!= NULL
,
8665 VAR_DOMAIN
, LOC_STATIC
,
8666 SECT_OFF_TEXT (objfile
),
8667 psymbol_placement::GLOBAL
,
8668 addr
, cu
->language
, objfile
);
8672 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8674 /* Static Variable. Skip symbols whose value we cannot know (those
8675 without location descriptors or constant values). */
8676 if (!has_loc
&& !pdi
->has_const_value
)
8679 add_psymbol_to_list (actual_name
,
8680 built_actual_name
!= NULL
,
8681 VAR_DOMAIN
, LOC_STATIC
,
8682 SECT_OFF_TEXT (objfile
),
8683 psymbol_placement::STATIC
,
8685 cu
->language
, objfile
);
8688 case DW_TAG_typedef
:
8689 case DW_TAG_base_type
:
8690 case DW_TAG_subrange_type
:
8691 add_psymbol_to_list (actual_name
,
8692 built_actual_name
!= NULL
,
8693 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8694 psymbol_placement::STATIC
,
8695 0, cu
->language
, objfile
);
8697 case DW_TAG_imported_declaration
:
8698 case DW_TAG_namespace
:
8699 add_psymbol_to_list (actual_name
,
8700 built_actual_name
!= NULL
,
8701 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8702 psymbol_placement::GLOBAL
,
8703 0, cu
->language
, objfile
);
8706 /* With Fortran 77 there might be a "BLOCK DATA" module
8707 available without any name. If so, we skip the module as it
8708 doesn't bring any value. */
8709 if (actual_name
!= nullptr)
8710 add_psymbol_to_list (actual_name
,
8711 built_actual_name
!= NULL
,
8712 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8713 psymbol_placement::GLOBAL
,
8714 0, cu
->language
, objfile
);
8716 case DW_TAG_class_type
:
8717 case DW_TAG_interface_type
:
8718 case DW_TAG_structure_type
:
8719 case DW_TAG_union_type
:
8720 case DW_TAG_enumeration_type
:
8721 /* Skip external references. The DWARF standard says in the section
8722 about "Structure, Union, and Class Type Entries": "An incomplete
8723 structure, union or class type is represented by a structure,
8724 union or class entry that does not have a byte size attribute
8725 and that has a DW_AT_declaration attribute." */
8726 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8729 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8730 static vs. global. */
8731 add_psymbol_to_list (actual_name
,
8732 built_actual_name
!= NULL
,
8733 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
8734 cu
->language
== language_cplus
8735 ? psymbol_placement::GLOBAL
8736 : psymbol_placement::STATIC
,
8737 0, cu
->language
, objfile
);
8740 case DW_TAG_enumerator
:
8741 add_psymbol_to_list (actual_name
,
8742 built_actual_name
!= NULL
,
8743 VAR_DOMAIN
, LOC_CONST
, -1,
8744 cu
->language
== language_cplus
8745 ? psymbol_placement::GLOBAL
8746 : psymbol_placement::STATIC
,
8747 0, cu
->language
, objfile
);
8754 /* Read a partial die corresponding to a namespace; also, add a symbol
8755 corresponding to that namespace to the symbol table. NAMESPACE is
8756 the name of the enclosing namespace. */
8759 add_partial_namespace (struct partial_die_info
*pdi
,
8760 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8761 int set_addrmap
, struct dwarf2_cu
*cu
)
8763 /* Add a symbol for the namespace. */
8765 add_partial_symbol (pdi
, cu
);
8767 /* Now scan partial symbols in that namespace. */
8769 if (pdi
->has_children
)
8770 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8773 /* Read a partial die corresponding to a Fortran module. */
8776 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8777 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8779 /* Add a symbol for the namespace. */
8781 add_partial_symbol (pdi
, cu
);
8783 /* Now scan partial symbols in that module. */
8785 if (pdi
->has_children
)
8786 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8789 /* Read a partial die corresponding to a subprogram or an inlined
8790 subprogram and create a partial symbol for that subprogram.
8791 When the CU language allows it, this routine also defines a partial
8792 symbol for each nested subprogram that this subprogram contains.
8793 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8794 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8796 PDI may also be a lexical block, in which case we simply search
8797 recursively for subprograms defined inside that lexical block.
8798 Again, this is only performed when the CU language allows this
8799 type of definitions. */
8802 add_partial_subprogram (struct partial_die_info
*pdi
,
8803 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8804 int set_addrmap
, struct dwarf2_cu
*cu
)
8806 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8808 if (pdi
->has_pc_info
)
8810 if (pdi
->lowpc
< *lowpc
)
8811 *lowpc
= pdi
->lowpc
;
8812 if (pdi
->highpc
> *highpc
)
8813 *highpc
= pdi
->highpc
;
8816 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8817 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8819 CORE_ADDR this_highpc
;
8820 CORE_ADDR this_lowpc
;
8822 baseaddr
= objfile
->text_section_offset ();
8824 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8825 pdi
->lowpc
+ baseaddr
)
8828 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8829 pdi
->highpc
+ baseaddr
)
8831 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8832 this_lowpc
, this_highpc
- 1,
8833 cu
->per_cu
->v
.psymtab
);
8837 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8839 if (!pdi
->is_declaration
)
8840 /* Ignore subprogram DIEs that do not have a name, they are
8841 illegal. Do not emit a complaint at this point, we will
8842 do so when we convert this psymtab into a symtab. */
8844 add_partial_symbol (pdi
, cu
);
8848 if (! pdi
->has_children
)
8851 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8853 pdi
= pdi
->die_child
;
8857 if (pdi
->tag
== DW_TAG_subprogram
8858 || pdi
->tag
== DW_TAG_inlined_subroutine
8859 || pdi
->tag
== DW_TAG_lexical_block
)
8860 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8861 pdi
= pdi
->die_sibling
;
8866 /* Read a partial die corresponding to an enumeration type. */
8869 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8870 struct dwarf2_cu
*cu
)
8872 struct partial_die_info
*pdi
;
8874 if (enum_pdi
->name
!= NULL
)
8875 add_partial_symbol (enum_pdi
, cu
);
8877 pdi
= enum_pdi
->die_child
;
8880 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8881 complaint (_("malformed enumerator DIE ignored"));
8883 add_partial_symbol (pdi
, cu
);
8884 pdi
= pdi
->die_sibling
;
8888 /* Return the initial uleb128 in the die at INFO_PTR. */
8891 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8893 unsigned int bytes_read
;
8895 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8898 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8899 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8901 Return the corresponding abbrev, or NULL if the number is zero (indicating
8902 an empty DIE). In either case *BYTES_READ will be set to the length of
8903 the initial number. */
8905 static struct abbrev_info
*
8906 peek_die_abbrev (const die_reader_specs
&reader
,
8907 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8909 dwarf2_cu
*cu
= reader
.cu
;
8910 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8911 unsigned int abbrev_number
8912 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8914 if (abbrev_number
== 0)
8917 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8920 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8921 " at offset %s [in module %s]"),
8922 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8923 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8929 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8930 Returns a pointer to the end of a series of DIEs, terminated by an empty
8931 DIE. Any children of the skipped DIEs will also be skipped. */
8933 static const gdb_byte
*
8934 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8938 unsigned int bytes_read
;
8939 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8942 return info_ptr
+ bytes_read
;
8944 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8948 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8949 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8950 abbrev corresponding to that skipped uleb128 should be passed in
8951 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8954 static const gdb_byte
*
8955 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8956 struct abbrev_info
*abbrev
)
8958 unsigned int bytes_read
;
8959 struct attribute attr
;
8960 bfd
*abfd
= reader
->abfd
;
8961 struct dwarf2_cu
*cu
= reader
->cu
;
8962 const gdb_byte
*buffer
= reader
->buffer
;
8963 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8964 unsigned int form
, i
;
8966 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8968 /* The only abbrev we care about is DW_AT_sibling. */
8969 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8972 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8974 if (attr
.form
== DW_FORM_ref_addr
)
8975 complaint (_("ignoring absolute DW_AT_sibling"));
8978 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
8979 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8981 if (sibling_ptr
< info_ptr
)
8982 complaint (_("DW_AT_sibling points backwards"));
8983 else if (sibling_ptr
> reader
->buffer_end
)
8984 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
8990 /* If it isn't DW_AT_sibling, skip this attribute. */
8991 form
= abbrev
->attrs
[i
].form
;
8995 case DW_FORM_ref_addr
:
8996 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8997 and later it is offset sized. */
8998 if (cu
->header
.version
== 2)
8999 info_ptr
+= cu
->header
.addr_size
;
9001 info_ptr
+= cu
->header
.offset_size
;
9003 case DW_FORM_GNU_ref_alt
:
9004 info_ptr
+= cu
->header
.offset_size
;
9007 info_ptr
+= cu
->header
.addr_size
;
9015 case DW_FORM_flag_present
:
9016 case DW_FORM_implicit_const
:
9033 case DW_FORM_ref_sig8
:
9036 case DW_FORM_data16
:
9039 case DW_FORM_string
:
9040 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9041 info_ptr
+= bytes_read
;
9043 case DW_FORM_sec_offset
:
9045 case DW_FORM_GNU_strp_alt
:
9046 info_ptr
+= cu
->header
.offset_size
;
9048 case DW_FORM_exprloc
:
9050 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9051 info_ptr
+= bytes_read
;
9053 case DW_FORM_block1
:
9054 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9056 case DW_FORM_block2
:
9057 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9059 case DW_FORM_block4
:
9060 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9066 case DW_FORM_ref_udata
:
9067 case DW_FORM_GNU_addr_index
:
9068 case DW_FORM_GNU_str_index
:
9069 case DW_FORM_rnglistx
:
9070 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9072 case DW_FORM_indirect
:
9073 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9074 info_ptr
+= bytes_read
;
9075 /* We need to continue parsing from here, so just go back to
9077 goto skip_attribute
;
9080 error (_("Dwarf Error: Cannot handle %s "
9081 "in DWARF reader [in module %s]"),
9082 dwarf_form_name (form
),
9083 bfd_get_filename (abfd
));
9087 if (abbrev
->has_children
)
9088 return skip_children (reader
, info_ptr
);
9093 /* Locate ORIG_PDI's sibling.
9094 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9096 static const gdb_byte
*
9097 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9098 struct partial_die_info
*orig_pdi
,
9099 const gdb_byte
*info_ptr
)
9101 /* Do we know the sibling already? */
9103 if (orig_pdi
->sibling
)
9104 return orig_pdi
->sibling
;
9106 /* Are there any children to deal with? */
9108 if (!orig_pdi
->has_children
)
9111 /* Skip the children the long way. */
9113 return skip_children (reader
, info_ptr
);
9116 /* Expand this partial symbol table into a full symbol table. SELF is
9120 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
9122 struct dwarf2_per_objfile
*dwarf2_per_objfile
9123 = get_dwarf2_per_objfile (objfile
);
9125 gdb_assert (!readin
);
9126 /* If this psymtab is constructed from a debug-only objfile, the
9127 has_section_at_zero flag will not necessarily be correct. We
9128 can get the correct value for this flag by looking at the data
9129 associated with the (presumably stripped) associated objfile. */
9130 if (objfile
->separate_debug_objfile_backlink
)
9132 struct dwarf2_per_objfile
*dpo_backlink
9133 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9135 dwarf2_per_objfile
->has_section_at_zero
9136 = dpo_backlink
->has_section_at_zero
;
9139 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9141 expand_psymtab (objfile
);
9143 process_cu_includes (dwarf2_per_objfile
);
9146 /* Reading in full CUs. */
9148 /* Add PER_CU to the queue. */
9151 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9152 enum language pretend_language
)
9155 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
9158 /* If PER_CU is not yet queued, add it to the queue.
9159 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9161 The result is non-zero if PER_CU was queued, otherwise the result is zero
9162 meaning either PER_CU is already queued or it is already loaded.
9164 N.B. There is an invariant here that if a CU is queued then it is loaded.
9165 The caller is required to load PER_CU if we return non-zero. */
9168 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9169 struct dwarf2_per_cu_data
*per_cu
,
9170 enum language pretend_language
)
9172 /* We may arrive here during partial symbol reading, if we need full
9173 DIEs to process an unusual case (e.g. template arguments). Do
9174 not queue PER_CU, just tell our caller to load its DIEs. */
9175 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9177 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9182 /* Mark the dependence relation so that we don't flush PER_CU
9184 if (dependent_cu
!= NULL
)
9185 dwarf2_add_dependence (dependent_cu
, per_cu
);
9187 /* If it's already on the queue, we have nothing to do. */
9191 /* If the compilation unit is already loaded, just mark it as
9193 if (per_cu
->cu
!= NULL
)
9195 per_cu
->cu
->last_used
= 0;
9199 /* Add it to the queue. */
9200 queue_comp_unit (per_cu
, pretend_language
);
9205 /* Process the queue. */
9208 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9210 if (dwarf_read_debug
)
9212 fprintf_unfiltered (gdb_stdlog
,
9213 "Expanding one or more symtabs of objfile %s ...\n",
9214 objfile_name (dwarf2_per_objfile
->objfile
));
9217 /* The queue starts out with one item, but following a DIE reference
9218 may load a new CU, adding it to the end of the queue. */
9219 while (!dwarf2_per_objfile
->queue
.empty ())
9221 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
9223 if ((dwarf2_per_objfile
->using_index
9224 ? !item
.per_cu
->v
.quick
->compunit_symtab
9225 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
9226 /* Skip dummy CUs. */
9227 && item
.per_cu
->cu
!= NULL
)
9229 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
9230 unsigned int debug_print_threshold
;
9233 if (per_cu
->is_debug_types
)
9235 struct signatured_type
*sig_type
=
9236 (struct signatured_type
*) per_cu
;
9238 sprintf (buf
, "TU %s at offset %s",
9239 hex_string (sig_type
->signature
),
9240 sect_offset_str (per_cu
->sect_off
));
9241 /* There can be 100s of TUs.
9242 Only print them in verbose mode. */
9243 debug_print_threshold
= 2;
9247 sprintf (buf
, "CU at offset %s",
9248 sect_offset_str (per_cu
->sect_off
));
9249 debug_print_threshold
= 1;
9252 if (dwarf_read_debug
>= debug_print_threshold
)
9253 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9255 if (per_cu
->is_debug_types
)
9256 process_full_type_unit (per_cu
, item
.pretend_language
);
9258 process_full_comp_unit (per_cu
, item
.pretend_language
);
9260 if (dwarf_read_debug
>= debug_print_threshold
)
9261 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9264 item
.per_cu
->queued
= 0;
9265 dwarf2_per_objfile
->queue
.pop ();
9268 if (dwarf_read_debug
)
9270 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9271 objfile_name (dwarf2_per_objfile
->objfile
));
9275 /* Read in full symbols for PST, and anything it depends on. */
9278 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9280 struct dwarf2_per_cu_data
*per_cu
;
9285 read_dependencies (objfile
);
9287 per_cu
= per_cu_data
;
9291 /* It's an include file, no symbols to read for it.
9292 Everything is in the parent symtab. */
9297 dw2_do_instantiate_symtab (per_cu
, false);
9300 /* Trivial hash function for die_info: the hash value of a DIE
9301 is its offset in .debug_info for this objfile. */
9304 die_hash (const void *item
)
9306 const struct die_info
*die
= (const struct die_info
*) item
;
9308 return to_underlying (die
->sect_off
);
9311 /* Trivial comparison function for die_info structures: two DIEs
9312 are equal if they have the same offset. */
9315 die_eq (const void *item_lhs
, const void *item_rhs
)
9317 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9318 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9320 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9323 /* Load the DIEs associated with PER_CU into memory. */
9326 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9328 enum language pretend_language
)
9330 gdb_assert (! this_cu
->is_debug_types
);
9332 cutu_reader
reader (this_cu
, NULL
, 1, 1, skip_partial
);
9336 struct dwarf2_cu
*cu
= reader
.cu
;
9337 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9339 gdb_assert (cu
->die_hash
== NULL
);
9341 htab_create_alloc_ex (cu
->header
.length
/ 12,
9345 &cu
->comp_unit_obstack
,
9346 hashtab_obstack_allocate
,
9347 dummy_obstack_deallocate
);
9349 if (reader
.comp_unit_die
->has_children
)
9350 reader
.comp_unit_die
->child
9351 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9352 &info_ptr
, reader
.comp_unit_die
);
9353 cu
->dies
= reader
.comp_unit_die
;
9354 /* comp_unit_die is not stored in die_hash, no need. */
9356 /* We try not to read any attributes in this function, because not
9357 all CUs needed for references have been loaded yet, and symbol
9358 table processing isn't initialized. But we have to set the CU language,
9359 or we won't be able to build types correctly.
9360 Similarly, if we do not read the producer, we can not apply
9361 producer-specific interpretation. */
9362 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9365 /* Add a DIE to the delayed physname list. */
9368 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9369 const char *name
, struct die_info
*die
,
9370 struct dwarf2_cu
*cu
)
9372 struct delayed_method_info mi
;
9374 mi
.fnfield_index
= fnfield_index
;
9378 cu
->method_list
.push_back (mi
);
9381 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9382 "const" / "volatile". If so, decrements LEN by the length of the
9383 modifier and return true. Otherwise return false. */
9387 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9389 size_t mod_len
= sizeof (mod
) - 1;
9390 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9398 /* Compute the physnames of any methods on the CU's method list.
9400 The computation of method physnames is delayed in order to avoid the
9401 (bad) condition that one of the method's formal parameters is of an as yet
9405 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9407 /* Only C++ delays computing physnames. */
9408 if (cu
->method_list
.empty ())
9410 gdb_assert (cu
->language
== language_cplus
);
9412 for (const delayed_method_info
&mi
: cu
->method_list
)
9414 const char *physname
;
9415 struct fn_fieldlist
*fn_flp
9416 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9417 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9418 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9419 = physname
? physname
: "";
9421 /* Since there's no tag to indicate whether a method is a
9422 const/volatile overload, extract that information out of the
9424 if (physname
!= NULL
)
9426 size_t len
= strlen (physname
);
9430 if (physname
[len
] == ')') /* shortcut */
9432 else if (check_modifier (physname
, len
, " const"))
9433 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9434 else if (check_modifier (physname
, len
, " volatile"))
9435 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9442 /* The list is no longer needed. */
9443 cu
->method_list
.clear ();
9446 /* Go objects should be embedded in a DW_TAG_module DIE,
9447 and it's not clear if/how imported objects will appear.
9448 To keep Go support simple until that's worked out,
9449 go back through what we've read and create something usable.
9450 We could do this while processing each DIE, and feels kinda cleaner,
9451 but that way is more invasive.
9452 This is to, for example, allow the user to type "p var" or "b main"
9453 without having to specify the package name, and allow lookups
9454 of module.object to work in contexts that use the expression
9458 fixup_go_packaging (struct dwarf2_cu
*cu
)
9460 gdb::unique_xmalloc_ptr
<char> package_name
;
9461 struct pending
*list
;
9464 for (list
= *cu
->get_builder ()->get_global_symbols ();
9468 for (i
= 0; i
< list
->nsyms
; ++i
)
9470 struct symbol
*sym
= list
->symbol
[i
];
9472 if (sym
->language () == language_go
9473 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9475 gdb::unique_xmalloc_ptr
<char> this_package_name
9476 (go_symbol_package_name (sym
));
9478 if (this_package_name
== NULL
)
9480 if (package_name
== NULL
)
9481 package_name
= std::move (this_package_name
);
9484 struct objfile
*objfile
9485 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9486 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9487 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9488 (symbol_symtab (sym
) != NULL
9489 ? symtab_to_filename_for_display
9490 (symbol_symtab (sym
))
9491 : objfile_name (objfile
)),
9492 this_package_name
.get (), package_name
.get ());
9498 if (package_name
!= NULL
)
9500 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9501 const char *saved_package_name
9502 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
, package_name
.get ());
9503 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9504 saved_package_name
);
9507 sym
= allocate_symbol (objfile
);
9508 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9509 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9510 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9511 e.g., "main" finds the "main" module and not C's main(). */
9512 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9513 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9514 SYMBOL_TYPE (sym
) = type
;
9516 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9520 /* Allocate a fully-qualified name consisting of the two parts on the
9524 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9526 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9529 /* A helper that allocates a struct discriminant_info to attach to a
9532 static struct discriminant_info
*
9533 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9536 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9537 gdb_assert (discriminant_index
== -1
9538 || (discriminant_index
>= 0
9539 && discriminant_index
< TYPE_NFIELDS (type
)));
9540 gdb_assert (default_index
== -1
9541 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9543 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9545 struct discriminant_info
*disc
9546 = ((struct discriminant_info
*)
9548 offsetof (struct discriminant_info
, discriminants
)
9549 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9550 disc
->default_index
= default_index
;
9551 disc
->discriminant_index
= discriminant_index
;
9553 struct dynamic_prop prop
;
9554 prop
.kind
= PROP_UNDEFINED
;
9555 prop
.data
.baton
= disc
;
9557 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9562 /* Some versions of rustc emitted enums in an unusual way.
9564 Ordinary enums were emitted as unions. The first element of each
9565 structure in the union was named "RUST$ENUM$DISR". This element
9566 held the discriminant.
9568 These versions of Rust also implemented the "non-zero"
9569 optimization. When the enum had two values, and one is empty and
9570 the other holds a pointer that cannot be zero, the pointer is used
9571 as the discriminant, with a zero value meaning the empty variant.
9572 Here, the union's first member is of the form
9573 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9574 where the fieldnos are the indices of the fields that should be
9575 traversed in order to find the field (which may be several fields deep)
9576 and the variantname is the name of the variant of the case when the
9579 This function recognizes whether TYPE is of one of these forms,
9580 and, if so, smashes it to be a variant type. */
9583 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9585 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9587 /* We don't need to deal with empty enums. */
9588 if (TYPE_NFIELDS (type
) == 0)
9591 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9592 if (TYPE_NFIELDS (type
) == 1
9593 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9595 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9597 /* Decode the field name to find the offset of the
9599 ULONGEST bit_offset
= 0;
9600 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9601 while (name
[0] >= '0' && name
[0] <= '9')
9604 unsigned long index
= strtoul (name
, &tail
, 10);
9607 || index
>= TYPE_NFIELDS (field_type
)
9608 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9609 != FIELD_LOC_KIND_BITPOS
))
9611 complaint (_("Could not parse Rust enum encoding string \"%s\""
9613 TYPE_FIELD_NAME (type
, 0),
9614 objfile_name (objfile
));
9619 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9620 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9623 /* Make a union to hold the variants. */
9624 struct type
*union_type
= alloc_type (objfile
);
9625 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9626 TYPE_NFIELDS (union_type
) = 3;
9627 TYPE_FIELDS (union_type
)
9628 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9629 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9630 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9632 /* Put the discriminant must at index 0. */
9633 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9634 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9635 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9636 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9638 /* The order of fields doesn't really matter, so put the real
9639 field at index 1 and the data-less field at index 2. */
9640 struct discriminant_info
*disc
9641 = alloc_discriminant_info (union_type
, 0, 1);
9642 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9643 TYPE_FIELD_NAME (union_type
, 1)
9644 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9645 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9646 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9647 TYPE_FIELD_NAME (union_type
, 1));
9649 const char *dataless_name
9650 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9652 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9654 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9655 /* NAME points into the original discriminant name, which
9656 already has the correct lifetime. */
9657 TYPE_FIELD_NAME (union_type
, 2) = name
;
9658 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9659 disc
->discriminants
[2] = 0;
9661 /* Smash this type to be a structure type. We have to do this
9662 because the type has already been recorded. */
9663 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9664 TYPE_NFIELDS (type
) = 1;
9666 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9668 /* Install the variant part. */
9669 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9670 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9671 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9673 /* A union with a single anonymous field is probably an old-style
9675 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9677 /* Smash this type to be a structure type. We have to do this
9678 because the type has already been recorded. */
9679 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9681 /* Make a union to hold the variants. */
9682 struct type
*union_type
= alloc_type (objfile
);
9683 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9684 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9685 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9686 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9687 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9689 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9690 const char *variant_name
9691 = rust_last_path_segment (TYPE_NAME (field_type
));
9692 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9693 TYPE_NAME (field_type
)
9694 = rust_fully_qualify (&objfile
->objfile_obstack
,
9695 TYPE_NAME (type
), variant_name
);
9697 /* Install the union in the outer struct type. */
9698 TYPE_NFIELDS (type
) = 1;
9700 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9701 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9702 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9703 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9705 alloc_discriminant_info (union_type
, -1, 0);
9709 struct type
*disr_type
= nullptr;
9710 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9712 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9714 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9716 /* All fields of a true enum will be structs. */
9719 else if (TYPE_NFIELDS (disr_type
) == 0)
9721 /* Could be data-less variant, so keep going. */
9722 disr_type
= nullptr;
9724 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9725 "RUST$ENUM$DISR") != 0)
9727 /* Not a Rust enum. */
9737 /* If we got here without a discriminant, then it's probably
9739 if (disr_type
== nullptr)
9742 /* Smash this type to be a structure type. We have to do this
9743 because the type has already been recorded. */
9744 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9746 /* Make a union to hold the variants. */
9747 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9748 struct type
*union_type
= alloc_type (objfile
);
9749 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9750 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
9751 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9752 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9753 TYPE_FIELDS (union_type
)
9754 = (struct field
*) TYPE_ZALLOC (union_type
,
9755 (TYPE_NFIELDS (union_type
)
9756 * sizeof (struct field
)));
9758 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
9759 TYPE_NFIELDS (type
) * sizeof (struct field
));
9761 /* Install the discriminant at index 0 in the union. */
9762 TYPE_FIELD (union_type
, 0) = *disr_field
;
9763 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9764 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9766 /* Install the union in the outer struct type. */
9767 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9768 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9769 TYPE_NFIELDS (type
) = 1;
9771 /* Set the size and offset of the union type. */
9772 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9774 /* We need a way to find the correct discriminant given a
9775 variant name. For convenience we build a map here. */
9776 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9777 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9778 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
9780 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9783 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9784 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9788 int n_fields
= TYPE_NFIELDS (union_type
);
9789 struct discriminant_info
*disc
9790 = alloc_discriminant_info (union_type
, 0, -1);
9791 /* Skip the discriminant here. */
9792 for (int i
= 1; i
< n_fields
; ++i
)
9794 /* Find the final word in the name of this variant's type.
9795 That name can be used to look up the correct
9797 const char *variant_name
9798 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
9801 auto iter
= discriminant_map
.find (variant_name
);
9802 if (iter
!= discriminant_map
.end ())
9803 disc
->discriminants
[i
] = iter
->second
;
9805 /* Remove the discriminant field, if it exists. */
9806 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
9807 if (TYPE_NFIELDS (sub_type
) > 0)
9809 --TYPE_NFIELDS (sub_type
);
9810 ++TYPE_FIELDS (sub_type
);
9812 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
9813 TYPE_NAME (sub_type
)
9814 = rust_fully_qualify (&objfile
->objfile_obstack
,
9815 TYPE_NAME (type
), variant_name
);
9820 /* Rewrite some Rust unions to be structures with variants parts. */
9823 rust_union_quirks (struct dwarf2_cu
*cu
)
9825 gdb_assert (cu
->language
== language_rust
);
9826 for (type
*type_
: cu
->rust_unions
)
9827 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9828 /* We don't need this any more. */
9829 cu
->rust_unions
.clear ();
9832 /* Return the symtab for PER_CU. This works properly regardless of
9833 whether we're using the index or psymtabs. */
9835 static struct compunit_symtab
*
9836 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9838 return (per_cu
->dwarf2_per_objfile
->using_index
9839 ? per_cu
->v
.quick
->compunit_symtab
9840 : per_cu
->v
.psymtab
->compunit_symtab
);
9843 /* A helper function for computing the list of all symbol tables
9844 included by PER_CU. */
9847 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9848 htab_t all_children
, htab_t all_type_symtabs
,
9849 struct dwarf2_per_cu_data
*per_cu
,
9850 struct compunit_symtab
*immediate_parent
)
9853 struct compunit_symtab
*cust
;
9855 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9858 /* This inclusion and its children have been processed. */
9863 /* Only add a CU if it has a symbol table. */
9864 cust
= get_compunit_symtab (per_cu
);
9867 /* If this is a type unit only add its symbol table if we haven't
9868 seen it yet (type unit per_cu's can share symtabs). */
9869 if (per_cu
->is_debug_types
)
9871 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9875 result
->push_back (cust
);
9876 if (cust
->user
== NULL
)
9877 cust
->user
= immediate_parent
;
9882 result
->push_back (cust
);
9883 if (cust
->user
== NULL
)
9884 cust
->user
= immediate_parent
;
9888 if (!per_cu
->imported_symtabs_empty ())
9889 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9891 recursively_compute_inclusions (result
, all_children
,
9892 all_type_symtabs
, ptr
, cust
);
9896 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9900 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9902 gdb_assert (! per_cu
->is_debug_types
);
9904 if (!per_cu
->imported_symtabs_empty ())
9907 std::vector
<compunit_symtab
*> result_symtabs
;
9908 htab_t all_children
, all_type_symtabs
;
9909 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9911 /* If we don't have a symtab, we can just skip this case. */
9915 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9916 NULL
, xcalloc
, xfree
);
9917 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9918 NULL
, xcalloc
, xfree
);
9920 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9922 recursively_compute_inclusions (&result_symtabs
, all_children
,
9923 all_type_symtabs
, ptr
, cust
);
9926 /* Now we have a transitive closure of all the included symtabs. */
9927 len
= result_symtabs
.size ();
9929 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9930 struct compunit_symtab
*, len
+ 1);
9931 memcpy (cust
->includes
, result_symtabs
.data (),
9932 len
* sizeof (compunit_symtab
*));
9933 cust
->includes
[len
] = NULL
;
9935 htab_delete (all_children
);
9936 htab_delete (all_type_symtabs
);
9940 /* Compute the 'includes' field for the symtabs of all the CUs we just
9944 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9946 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9948 if (! iter
->is_debug_types
)
9949 compute_compunit_symtab_includes (iter
);
9952 dwarf2_per_objfile
->just_read_cus
.clear ();
9955 /* Generate full symbol information for PER_CU, whose DIEs have
9956 already been loaded into memory. */
9959 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9960 enum language pretend_language
)
9962 struct dwarf2_cu
*cu
= per_cu
->cu
;
9963 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9964 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9965 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9966 CORE_ADDR lowpc
, highpc
;
9967 struct compunit_symtab
*cust
;
9969 struct block
*static_block
;
9972 baseaddr
= objfile
->text_section_offset ();
9974 /* Clear the list here in case something was left over. */
9975 cu
->method_list
.clear ();
9977 cu
->language
= pretend_language
;
9978 cu
->language_defn
= language_def (cu
->language
);
9980 /* Do line number decoding in read_file_scope () */
9981 process_die (cu
->dies
, cu
);
9983 /* For now fudge the Go package. */
9984 if (cu
->language
== language_go
)
9985 fixup_go_packaging (cu
);
9987 /* Now that we have processed all the DIEs in the CU, all the types
9988 should be complete, and it should now be safe to compute all of the
9990 compute_delayed_physnames (cu
);
9992 if (cu
->language
== language_rust
)
9993 rust_union_quirks (cu
);
9995 /* Some compilers don't define a DW_AT_high_pc attribute for the
9996 compilation unit. If the DW_AT_high_pc is missing, synthesize
9997 it, by scanning the DIE's below the compilation unit. */
9998 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10000 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10001 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10003 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10004 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10005 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10006 addrmap to help ensure it has an accurate map of pc values belonging to
10008 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10010 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10011 SECT_OFF_TEXT (objfile
),
10016 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10018 /* Set symtab language to language from DW_AT_language. If the
10019 compilation is from a C file generated by language preprocessors, do
10020 not set the language if it was already deduced by start_subfile. */
10021 if (!(cu
->language
== language_c
10022 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10023 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10025 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10026 produce DW_AT_location with location lists but it can be possibly
10027 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10028 there were bugs in prologue debug info, fixed later in GCC-4.5
10029 by "unwind info for epilogues" patch (which is not directly related).
10031 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10032 needed, it would be wrong due to missing DW_AT_producer there.
10034 Still one can confuse GDB by using non-standard GCC compilation
10035 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10037 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10038 cust
->locations_valid
= 1;
10040 if (gcc_4_minor
>= 5)
10041 cust
->epilogue_unwind_valid
= 1;
10043 cust
->call_site_htab
= cu
->call_site_htab
;
10046 if (dwarf2_per_objfile
->using_index
)
10047 per_cu
->v
.quick
->compunit_symtab
= cust
;
10050 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
10051 pst
->compunit_symtab
= cust
;
10052 pst
->readin
= true;
10055 /* Push it for inclusion processing later. */
10056 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10058 /* Not needed any more. */
10059 cu
->reset_builder ();
10062 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10063 already been loaded into memory. */
10066 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10067 enum language pretend_language
)
10069 struct dwarf2_cu
*cu
= per_cu
->cu
;
10070 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10071 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10072 struct compunit_symtab
*cust
;
10073 struct signatured_type
*sig_type
;
10075 gdb_assert (per_cu
->is_debug_types
);
10076 sig_type
= (struct signatured_type
*) per_cu
;
10078 /* Clear the list here in case something was left over. */
10079 cu
->method_list
.clear ();
10081 cu
->language
= pretend_language
;
10082 cu
->language_defn
= language_def (cu
->language
);
10084 /* The symbol tables are set up in read_type_unit_scope. */
10085 process_die (cu
->dies
, cu
);
10087 /* For now fudge the Go package. */
10088 if (cu
->language
== language_go
)
10089 fixup_go_packaging (cu
);
10091 /* Now that we have processed all the DIEs in the CU, all the types
10092 should be complete, and it should now be safe to compute all of the
10094 compute_delayed_physnames (cu
);
10096 if (cu
->language
== language_rust
)
10097 rust_union_quirks (cu
);
10099 /* TUs share symbol tables.
10100 If this is the first TU to use this symtab, complete the construction
10101 of it with end_expandable_symtab. Otherwise, complete the addition of
10102 this TU's symbols to the existing symtab. */
10103 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10105 buildsym_compunit
*builder
= cu
->get_builder ();
10106 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10107 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10111 /* Set symtab language to language from DW_AT_language. If the
10112 compilation is from a C file generated by language preprocessors,
10113 do not set the language if it was already deduced by
10115 if (!(cu
->language
== language_c
10116 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10117 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10122 cu
->get_builder ()->augment_type_symtab ();
10123 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10126 if (dwarf2_per_objfile
->using_index
)
10127 per_cu
->v
.quick
->compunit_symtab
= cust
;
10130 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
10131 pst
->compunit_symtab
= cust
;
10132 pst
->readin
= true;
10135 /* Not needed any more. */
10136 cu
->reset_builder ();
10139 /* Process an imported unit DIE. */
10142 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10144 struct attribute
*attr
;
10146 /* For now we don't handle imported units in type units. */
10147 if (cu
->per_cu
->is_debug_types
)
10149 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10150 " supported in type units [in module %s]"),
10151 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10154 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10157 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10158 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10159 dwarf2_per_cu_data
*per_cu
10160 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10161 cu
->per_cu
->dwarf2_per_objfile
);
10163 /* If necessary, add it to the queue and load its DIEs. */
10164 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10165 load_full_comp_unit (per_cu
, false, cu
->language
);
10167 cu
->per_cu
->imported_symtabs_push (per_cu
);
10171 /* RAII object that represents a process_die scope: i.e.,
10172 starts/finishes processing a DIE. */
10173 class process_die_scope
10176 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10177 : m_die (die
), m_cu (cu
)
10179 /* We should only be processing DIEs not already in process. */
10180 gdb_assert (!m_die
->in_process
);
10181 m_die
->in_process
= true;
10184 ~process_die_scope ()
10186 m_die
->in_process
= false;
10188 /* If we're done processing the DIE for the CU that owns the line
10189 header, we don't need the line header anymore. */
10190 if (m_cu
->line_header_die_owner
== m_die
)
10192 delete m_cu
->line_header
;
10193 m_cu
->line_header
= NULL
;
10194 m_cu
->line_header_die_owner
= NULL
;
10203 /* Process a die and its children. */
10206 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10208 process_die_scope
scope (die
, cu
);
10212 case DW_TAG_padding
:
10214 case DW_TAG_compile_unit
:
10215 case DW_TAG_partial_unit
:
10216 read_file_scope (die
, cu
);
10218 case DW_TAG_type_unit
:
10219 read_type_unit_scope (die
, cu
);
10221 case DW_TAG_subprogram
:
10222 /* Nested subprograms in Fortran get a prefix. */
10223 if (cu
->language
== language_fortran
10224 && die
->parent
!= NULL
10225 && die
->parent
->tag
== DW_TAG_subprogram
)
10226 cu
->processing_has_namespace_info
= true;
10227 /* Fall through. */
10228 case DW_TAG_inlined_subroutine
:
10229 read_func_scope (die
, cu
);
10231 case DW_TAG_lexical_block
:
10232 case DW_TAG_try_block
:
10233 case DW_TAG_catch_block
:
10234 read_lexical_block_scope (die
, cu
);
10236 case DW_TAG_call_site
:
10237 case DW_TAG_GNU_call_site
:
10238 read_call_site_scope (die
, cu
);
10240 case DW_TAG_class_type
:
10241 case DW_TAG_interface_type
:
10242 case DW_TAG_structure_type
:
10243 case DW_TAG_union_type
:
10244 process_structure_scope (die
, cu
);
10246 case DW_TAG_enumeration_type
:
10247 process_enumeration_scope (die
, cu
);
10250 /* These dies have a type, but processing them does not create
10251 a symbol or recurse to process the children. Therefore we can
10252 read them on-demand through read_type_die. */
10253 case DW_TAG_subroutine_type
:
10254 case DW_TAG_set_type
:
10255 case DW_TAG_array_type
:
10256 case DW_TAG_pointer_type
:
10257 case DW_TAG_ptr_to_member_type
:
10258 case DW_TAG_reference_type
:
10259 case DW_TAG_rvalue_reference_type
:
10260 case DW_TAG_string_type
:
10263 case DW_TAG_base_type
:
10264 case DW_TAG_subrange_type
:
10265 case DW_TAG_typedef
:
10266 /* Add a typedef symbol for the type definition, if it has a
10268 new_symbol (die
, read_type_die (die
, cu
), cu
);
10270 case DW_TAG_common_block
:
10271 read_common_block (die
, cu
);
10273 case DW_TAG_common_inclusion
:
10275 case DW_TAG_namespace
:
10276 cu
->processing_has_namespace_info
= true;
10277 read_namespace (die
, cu
);
10279 case DW_TAG_module
:
10280 cu
->processing_has_namespace_info
= true;
10281 read_module (die
, cu
);
10283 case DW_TAG_imported_declaration
:
10284 cu
->processing_has_namespace_info
= true;
10285 if (read_namespace_alias (die
, cu
))
10287 /* The declaration is not a global namespace alias. */
10288 /* Fall through. */
10289 case DW_TAG_imported_module
:
10290 cu
->processing_has_namespace_info
= true;
10291 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10292 || cu
->language
!= language_fortran
))
10293 complaint (_("Tag '%s' has unexpected children"),
10294 dwarf_tag_name (die
->tag
));
10295 read_import_statement (die
, cu
);
10298 case DW_TAG_imported_unit
:
10299 process_imported_unit_die (die
, cu
);
10302 case DW_TAG_variable
:
10303 read_variable (die
, cu
);
10307 new_symbol (die
, NULL
, cu
);
10312 /* DWARF name computation. */
10314 /* A helper function for dwarf2_compute_name which determines whether DIE
10315 needs to have the name of the scope prepended to the name listed in the
10319 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10321 struct attribute
*attr
;
10325 case DW_TAG_namespace
:
10326 case DW_TAG_typedef
:
10327 case DW_TAG_class_type
:
10328 case DW_TAG_interface_type
:
10329 case DW_TAG_structure_type
:
10330 case DW_TAG_union_type
:
10331 case DW_TAG_enumeration_type
:
10332 case DW_TAG_enumerator
:
10333 case DW_TAG_subprogram
:
10334 case DW_TAG_inlined_subroutine
:
10335 case DW_TAG_member
:
10336 case DW_TAG_imported_declaration
:
10339 case DW_TAG_variable
:
10340 case DW_TAG_constant
:
10341 /* We only need to prefix "globally" visible variables. These include
10342 any variable marked with DW_AT_external or any variable that
10343 lives in a namespace. [Variables in anonymous namespaces
10344 require prefixing, but they are not DW_AT_external.] */
10346 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10348 struct dwarf2_cu
*spec_cu
= cu
;
10350 return die_needs_namespace (die_specification (die
, &spec_cu
),
10354 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10355 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10356 && die
->parent
->tag
!= DW_TAG_module
)
10358 /* A variable in a lexical block of some kind does not need a
10359 namespace, even though in C++ such variables may be external
10360 and have a mangled name. */
10361 if (die
->parent
->tag
== DW_TAG_lexical_block
10362 || die
->parent
->tag
== DW_TAG_try_block
10363 || die
->parent
->tag
== DW_TAG_catch_block
10364 || die
->parent
->tag
== DW_TAG_subprogram
)
10373 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10374 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10375 defined for the given DIE. */
10377 static struct attribute
*
10378 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10380 struct attribute
*attr
;
10382 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10384 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10389 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10390 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10391 defined for the given DIE. */
10393 static const char *
10394 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10396 const char *linkage_name
;
10398 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10399 if (linkage_name
== NULL
)
10400 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10402 return linkage_name
;
10405 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10406 compute the physname for the object, which include a method's:
10407 - formal parameters (C++),
10408 - receiver type (Go),
10410 The term "physname" is a bit confusing.
10411 For C++, for example, it is the demangled name.
10412 For Go, for example, it's the mangled name.
10414 For Ada, return the DIE's linkage name rather than the fully qualified
10415 name. PHYSNAME is ignored..
10417 The result is allocated on the objfile_obstack and canonicalized. */
10419 static const char *
10420 dwarf2_compute_name (const char *name
,
10421 struct die_info
*die
, struct dwarf2_cu
*cu
,
10424 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10427 name
= dwarf2_name (die
, cu
);
10429 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10430 but otherwise compute it by typename_concat inside GDB.
10431 FIXME: Actually this is not really true, or at least not always true.
10432 It's all very confusing. compute_and_set_names doesn't try to demangle
10433 Fortran names because there is no mangling standard. So new_symbol
10434 will set the demangled name to the result of dwarf2_full_name, and it is
10435 the demangled name that GDB uses if it exists. */
10436 if (cu
->language
== language_ada
10437 || (cu
->language
== language_fortran
&& physname
))
10439 /* For Ada unit, we prefer the linkage name over the name, as
10440 the former contains the exported name, which the user expects
10441 to be able to reference. Ideally, we want the user to be able
10442 to reference this entity using either natural or linkage name,
10443 but we haven't started looking at this enhancement yet. */
10444 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10446 if (linkage_name
!= NULL
)
10447 return linkage_name
;
10450 /* These are the only languages we know how to qualify names in. */
10452 && (cu
->language
== language_cplus
10453 || cu
->language
== language_fortran
|| cu
->language
== language_d
10454 || cu
->language
== language_rust
))
10456 if (die_needs_namespace (die
, cu
))
10458 const char *prefix
;
10459 const char *canonical_name
= NULL
;
10463 prefix
= determine_prefix (die
, cu
);
10464 if (*prefix
!= '\0')
10466 gdb::unique_xmalloc_ptr
<char> prefixed_name
10467 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10469 buf
.puts (prefixed_name
.get ());
10474 /* Template parameters may be specified in the DIE's DW_AT_name, or
10475 as children with DW_TAG_template_type_param or
10476 DW_TAG_value_type_param. If the latter, add them to the name
10477 here. If the name already has template parameters, then
10478 skip this step; some versions of GCC emit both, and
10479 it is more efficient to use the pre-computed name.
10481 Something to keep in mind about this process: it is very
10482 unlikely, or in some cases downright impossible, to produce
10483 something that will match the mangled name of a function.
10484 If the definition of the function has the same debug info,
10485 we should be able to match up with it anyway. But fallbacks
10486 using the minimal symbol, for instance to find a method
10487 implemented in a stripped copy of libstdc++, will not work.
10488 If we do not have debug info for the definition, we will have to
10489 match them up some other way.
10491 When we do name matching there is a related problem with function
10492 templates; two instantiated function templates are allowed to
10493 differ only by their return types, which we do not add here. */
10495 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10497 struct attribute
*attr
;
10498 struct die_info
*child
;
10501 die
->building_fullname
= 1;
10503 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10507 const gdb_byte
*bytes
;
10508 struct dwarf2_locexpr_baton
*baton
;
10511 if (child
->tag
!= DW_TAG_template_type_param
10512 && child
->tag
!= DW_TAG_template_value_param
)
10523 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10526 complaint (_("template parameter missing DW_AT_type"));
10527 buf
.puts ("UNKNOWN_TYPE");
10530 type
= die_type (child
, cu
);
10532 if (child
->tag
== DW_TAG_template_type_param
)
10534 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10535 &type_print_raw_options
);
10539 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10542 complaint (_("template parameter missing "
10543 "DW_AT_const_value"));
10544 buf
.puts ("UNKNOWN_VALUE");
10548 dwarf2_const_value_attr (attr
, type
, name
,
10549 &cu
->comp_unit_obstack
, cu
,
10550 &value
, &bytes
, &baton
);
10552 if (TYPE_NOSIGN (type
))
10553 /* GDB prints characters as NUMBER 'CHAR'. If that's
10554 changed, this can use value_print instead. */
10555 c_printchar (value
, type
, &buf
);
10558 struct value_print_options opts
;
10561 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10565 else if (bytes
!= NULL
)
10567 v
= allocate_value (type
);
10568 memcpy (value_contents_writeable (v
), bytes
,
10569 TYPE_LENGTH (type
));
10572 v
= value_from_longest (type
, value
);
10574 /* Specify decimal so that we do not depend on
10576 get_formatted_print_options (&opts
, 'd');
10578 value_print (v
, &buf
, &opts
);
10583 die
->building_fullname
= 0;
10587 /* Close the argument list, with a space if necessary
10588 (nested templates). */
10589 if (!buf
.empty () && buf
.string ().back () == '>')
10596 /* For C++ methods, append formal parameter type
10597 information, if PHYSNAME. */
10599 if (physname
&& die
->tag
== DW_TAG_subprogram
10600 && cu
->language
== language_cplus
)
10602 struct type
*type
= read_type_die (die
, cu
);
10604 c_type_print_args (type
, &buf
, 1, cu
->language
,
10605 &type_print_raw_options
);
10607 if (cu
->language
== language_cplus
)
10609 /* Assume that an artificial first parameter is
10610 "this", but do not crash if it is not. RealView
10611 marks unnamed (and thus unused) parameters as
10612 artificial; there is no way to differentiate
10614 if (TYPE_NFIELDS (type
) > 0
10615 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10616 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10617 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10619 buf
.puts (" const");
10623 const std::string
&intermediate_name
= buf
.string ();
10625 if (cu
->language
== language_cplus
)
10627 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10628 &objfile
->per_bfd
->storage_obstack
);
10630 /* If we only computed INTERMEDIATE_NAME, or if
10631 INTERMEDIATE_NAME is already canonical, then we need to
10632 copy it to the appropriate obstack. */
10633 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10634 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
10635 intermediate_name
);
10637 name
= canonical_name
;
10644 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10645 If scope qualifiers are appropriate they will be added. The result
10646 will be allocated on the storage_obstack, or NULL if the DIE does
10647 not have a name. NAME may either be from a previous call to
10648 dwarf2_name or NULL.
10650 The output string will be canonicalized (if C++). */
10652 static const char *
10653 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10655 return dwarf2_compute_name (name
, die
, cu
, 0);
10658 /* Construct a physname for the given DIE in CU. NAME may either be
10659 from a previous call to dwarf2_name or NULL. The result will be
10660 allocated on the objfile_objstack or NULL if the DIE does not have a
10663 The output string will be canonicalized (if C++). */
10665 static const char *
10666 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10668 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10669 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10672 /* In this case dwarf2_compute_name is just a shortcut not building anything
10674 if (!die_needs_namespace (die
, cu
))
10675 return dwarf2_compute_name (name
, die
, cu
, 1);
10677 mangled
= dw2_linkage_name (die
, cu
);
10679 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10680 See https://github.com/rust-lang/rust/issues/32925. */
10681 if (cu
->language
== language_rust
&& mangled
!= NULL
10682 && strchr (mangled
, '{') != NULL
)
10685 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10687 gdb::unique_xmalloc_ptr
<char> demangled
;
10688 if (mangled
!= NULL
)
10691 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10693 /* Do nothing (do not demangle the symbol name). */
10695 else if (cu
->language
== language_go
)
10697 /* This is a lie, but we already lie to the caller new_symbol.
10698 new_symbol assumes we return the mangled name.
10699 This just undoes that lie until things are cleaned up. */
10703 /* Use DMGL_RET_DROP for C++ template functions to suppress
10704 their return type. It is easier for GDB users to search
10705 for such functions as `name(params)' than `long name(params)'.
10706 In such case the minimal symbol names do not match the full
10707 symbol names but for template functions there is never a need
10708 to look up their definition from their declaration so
10709 the only disadvantage remains the minimal symbol variant
10710 `long name(params)' does not have the proper inferior type. */
10711 demangled
.reset (gdb_demangle (mangled
,
10712 (DMGL_PARAMS
| DMGL_ANSI
10713 | DMGL_RET_DROP
)));
10716 canon
= demangled
.get ();
10724 if (canon
== NULL
|| check_physname
)
10726 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10728 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10730 /* It may not mean a bug in GDB. The compiler could also
10731 compute DW_AT_linkage_name incorrectly. But in such case
10732 GDB would need to be bug-to-bug compatible. */
10734 complaint (_("Computed physname <%s> does not match demangled <%s> "
10735 "(from linkage <%s>) - DIE at %s [in module %s]"),
10736 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10737 objfile_name (objfile
));
10739 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10740 is available here - over computed PHYSNAME. It is safer
10741 against both buggy GDB and buggy compilers. */
10755 retval
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, retval
);
10760 /* Inspect DIE in CU for a namespace alias. If one exists, record
10761 a new symbol for it.
10763 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10766 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10768 struct attribute
*attr
;
10770 /* If the die does not have a name, this is not a namespace
10772 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10776 struct die_info
*d
= die
;
10777 struct dwarf2_cu
*imported_cu
= cu
;
10779 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10780 keep inspecting DIEs until we hit the underlying import. */
10781 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10782 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10784 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10788 d
= follow_die_ref (d
, attr
, &imported_cu
);
10789 if (d
->tag
!= DW_TAG_imported_declaration
)
10793 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10795 complaint (_("DIE at %s has too many recursively imported "
10796 "declarations"), sect_offset_str (d
->sect_off
));
10803 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10805 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10806 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
10808 /* This declaration is a global namespace alias. Add
10809 a symbol for it whose type is the aliased namespace. */
10810 new_symbol (die
, type
, cu
);
10819 /* Return the using directives repository (global or local?) to use in the
10820 current context for CU.
10822 For Ada, imported declarations can materialize renamings, which *may* be
10823 global. However it is impossible (for now?) in DWARF to distinguish
10824 "external" imported declarations and "static" ones. As all imported
10825 declarations seem to be static in all other languages, make them all CU-wide
10826 global only in Ada. */
10828 static struct using_direct
**
10829 using_directives (struct dwarf2_cu
*cu
)
10831 if (cu
->language
== language_ada
10832 && cu
->get_builder ()->outermost_context_p ())
10833 return cu
->get_builder ()->get_global_using_directives ();
10835 return cu
->get_builder ()->get_local_using_directives ();
10838 /* Read the import statement specified by the given die and record it. */
10841 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10843 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10844 struct attribute
*import_attr
;
10845 struct die_info
*imported_die
, *child_die
;
10846 struct dwarf2_cu
*imported_cu
;
10847 const char *imported_name
;
10848 const char *imported_name_prefix
;
10849 const char *canonical_name
;
10850 const char *import_alias
;
10851 const char *imported_declaration
= NULL
;
10852 const char *import_prefix
;
10853 std::vector
<const char *> excludes
;
10855 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10856 if (import_attr
== NULL
)
10858 complaint (_("Tag '%s' has no DW_AT_import"),
10859 dwarf_tag_name (die
->tag
));
10864 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10865 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10866 if (imported_name
== NULL
)
10868 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10870 The import in the following code:
10884 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10885 <52> DW_AT_decl_file : 1
10886 <53> DW_AT_decl_line : 6
10887 <54> DW_AT_import : <0x75>
10888 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10889 <59> DW_AT_name : B
10890 <5b> DW_AT_decl_file : 1
10891 <5c> DW_AT_decl_line : 2
10892 <5d> DW_AT_type : <0x6e>
10894 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10895 <76> DW_AT_byte_size : 4
10896 <77> DW_AT_encoding : 5 (signed)
10898 imports the wrong die ( 0x75 instead of 0x58 ).
10899 This case will be ignored until the gcc bug is fixed. */
10903 /* Figure out the local name after import. */
10904 import_alias
= dwarf2_name (die
, cu
);
10906 /* Figure out where the statement is being imported to. */
10907 import_prefix
= determine_prefix (die
, cu
);
10909 /* Figure out what the scope of the imported die is and prepend it
10910 to the name of the imported die. */
10911 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10913 if (imported_die
->tag
!= DW_TAG_namespace
10914 && imported_die
->tag
!= DW_TAG_module
)
10916 imported_declaration
= imported_name
;
10917 canonical_name
= imported_name_prefix
;
10919 else if (strlen (imported_name_prefix
) > 0)
10920 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10921 imported_name_prefix
,
10922 (cu
->language
== language_d
? "." : "::"),
10923 imported_name
, (char *) NULL
);
10925 canonical_name
= imported_name
;
10927 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10928 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10929 child_die
= sibling_die (child_die
))
10931 /* DWARF-4: A Fortran use statement with a “rename list” may be
10932 represented by an imported module entry with an import attribute
10933 referring to the module and owned entries corresponding to those
10934 entities that are renamed as part of being imported. */
10936 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10938 complaint (_("child DW_TAG_imported_declaration expected "
10939 "- DIE at %s [in module %s]"),
10940 sect_offset_str (child_die
->sect_off
),
10941 objfile_name (objfile
));
10945 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10946 if (import_attr
== NULL
)
10948 complaint (_("Tag '%s' has no DW_AT_import"),
10949 dwarf_tag_name (child_die
->tag
));
10954 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10956 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10957 if (imported_name
== NULL
)
10959 complaint (_("child DW_TAG_imported_declaration has unknown "
10960 "imported name - DIE at %s [in module %s]"),
10961 sect_offset_str (child_die
->sect_off
),
10962 objfile_name (objfile
));
10966 excludes
.push_back (imported_name
);
10968 process_die (child_die
, cu
);
10971 add_using_directive (using_directives (cu
),
10975 imported_declaration
,
10978 &objfile
->objfile_obstack
);
10981 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10982 types, but gives them a size of zero. Starting with version 14,
10983 ICC is compatible with GCC. */
10986 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10988 if (!cu
->checked_producer
)
10989 check_producer (cu
);
10991 return cu
->producer_is_icc_lt_14
;
10994 /* ICC generates a DW_AT_type for C void functions. This was observed on
10995 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10996 which says that void functions should not have a DW_AT_type. */
10999 producer_is_icc (struct dwarf2_cu
*cu
)
11001 if (!cu
->checked_producer
)
11002 check_producer (cu
);
11004 return cu
->producer_is_icc
;
11007 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11008 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11009 this, it was first present in GCC release 4.3.0. */
11012 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11014 if (!cu
->checked_producer
)
11015 check_producer (cu
);
11017 return cu
->producer_is_gcc_lt_4_3
;
11020 static file_and_directory
11021 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11023 file_and_directory res
;
11025 /* Find the filename. Do not use dwarf2_name here, since the filename
11026 is not a source language identifier. */
11027 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11028 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11030 if (res
.comp_dir
== NULL
11031 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11032 && IS_ABSOLUTE_PATH (res
.name
))
11034 res
.comp_dir_storage
= ldirname (res
.name
);
11035 if (!res
.comp_dir_storage
.empty ())
11036 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11038 if (res
.comp_dir
!= NULL
)
11040 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11041 directory, get rid of it. */
11042 const char *cp
= strchr (res
.comp_dir
, ':');
11044 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11045 res
.comp_dir
= cp
+ 1;
11048 if (res
.name
== NULL
)
11049 res
.name
= "<unknown>";
11054 /* Handle DW_AT_stmt_list for a compilation unit.
11055 DIE is the DW_TAG_compile_unit die for CU.
11056 COMP_DIR is the compilation directory. LOWPC is passed to
11057 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11060 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11061 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11063 struct dwarf2_per_objfile
*dwarf2_per_objfile
11064 = cu
->per_cu
->dwarf2_per_objfile
;
11065 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11066 struct attribute
*attr
;
11067 struct line_header line_header_local
;
11068 hashval_t line_header_local_hash
;
11070 int decode_mapping
;
11072 gdb_assert (! cu
->per_cu
->is_debug_types
);
11074 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11078 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11080 /* The line header hash table is only created if needed (it exists to
11081 prevent redundant reading of the line table for partial_units).
11082 If we're given a partial_unit, we'll need it. If we're given a
11083 compile_unit, then use the line header hash table if it's already
11084 created, but don't create one just yet. */
11086 if (dwarf2_per_objfile
->line_header_hash
== NULL
11087 && die
->tag
== DW_TAG_partial_unit
)
11089 dwarf2_per_objfile
->line_header_hash
11090 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11091 line_header_eq_voidp
,
11092 free_line_header_voidp
,
11093 &objfile
->objfile_obstack
,
11094 hashtab_obstack_allocate
,
11095 dummy_obstack_deallocate
);
11098 line_header_local
.sect_off
= line_offset
;
11099 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11100 line_header_local_hash
= line_header_hash (&line_header_local
);
11101 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11103 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11104 &line_header_local
,
11105 line_header_local_hash
, NO_INSERT
);
11107 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11108 is not present in *SLOT (since if there is something in *SLOT then
11109 it will be for a partial_unit). */
11110 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11112 gdb_assert (*slot
!= NULL
);
11113 cu
->line_header
= (struct line_header
*) *slot
;
11118 /* dwarf_decode_line_header does not yet provide sufficient information.
11119 We always have to call also dwarf_decode_lines for it. */
11120 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11124 cu
->line_header
= lh
.release ();
11125 cu
->line_header_die_owner
= die
;
11127 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11131 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11132 &line_header_local
,
11133 line_header_local_hash
, INSERT
);
11134 gdb_assert (slot
!= NULL
);
11136 if (slot
!= NULL
&& *slot
== NULL
)
11138 /* This newly decoded line number information unit will be owned
11139 by line_header_hash hash table. */
11140 *slot
= cu
->line_header
;
11141 cu
->line_header_die_owner
= NULL
;
11145 /* We cannot free any current entry in (*slot) as that struct line_header
11146 may be already used by multiple CUs. Create only temporary decoded
11147 line_header for this CU - it may happen at most once for each line
11148 number information unit. And if we're not using line_header_hash
11149 then this is what we want as well. */
11150 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11152 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11153 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11158 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11161 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11163 struct dwarf2_per_objfile
*dwarf2_per_objfile
11164 = cu
->per_cu
->dwarf2_per_objfile
;
11165 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11166 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11167 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11168 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11169 struct attribute
*attr
;
11170 struct die_info
*child_die
;
11171 CORE_ADDR baseaddr
;
11173 prepare_one_comp_unit (cu
, die
, cu
->language
);
11174 baseaddr
= objfile
->text_section_offset ();
11176 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11178 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11179 from finish_block. */
11180 if (lowpc
== ((CORE_ADDR
) -1))
11182 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11184 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11186 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11187 standardised yet. As a workaround for the language detection we fall
11188 back to the DW_AT_producer string. */
11189 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11190 cu
->language
= language_opencl
;
11192 /* Similar hack for Go. */
11193 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11194 set_cu_language (DW_LANG_Go
, cu
);
11196 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11198 /* Decode line number information if present. We do this before
11199 processing child DIEs, so that the line header table is available
11200 for DW_AT_decl_file. */
11201 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11203 /* Process all dies in compilation unit. */
11204 if (die
->child
!= NULL
)
11206 child_die
= die
->child
;
11207 while (child_die
&& child_die
->tag
)
11209 process_die (child_die
, cu
);
11210 child_die
= sibling_die (child_die
);
11214 /* Decode macro information, if present. Dwarf 2 macro information
11215 refers to information in the line number info statement program
11216 header, so we can only read it if we've read the header
11218 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11220 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11221 if (attr
&& cu
->line_header
)
11223 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11224 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11226 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11230 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11231 if (attr
&& cu
->line_header
)
11233 unsigned int macro_offset
= DW_UNSND (attr
);
11235 dwarf_decode_macros (cu
, macro_offset
, 0);
11241 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11243 struct type_unit_group
*tu_group
;
11245 struct attribute
*attr
;
11247 struct signatured_type
*sig_type
;
11249 gdb_assert (per_cu
->is_debug_types
);
11250 sig_type
= (struct signatured_type
*) per_cu
;
11252 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11254 /* If we're using .gdb_index (includes -readnow) then
11255 per_cu->type_unit_group may not have been set up yet. */
11256 if (sig_type
->type_unit_group
== NULL
)
11257 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11258 tu_group
= sig_type
->type_unit_group
;
11260 /* If we've already processed this stmt_list there's no real need to
11261 do it again, we could fake it and just recreate the part we need
11262 (file name,index -> symtab mapping). If data shows this optimization
11263 is useful we can do it then. */
11264 first_time
= tu_group
->compunit_symtab
== NULL
;
11266 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11271 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11272 lh
= dwarf_decode_line_header (line_offset
, this);
11277 start_symtab ("", NULL
, 0);
11280 gdb_assert (tu_group
->symtabs
== NULL
);
11281 gdb_assert (m_builder
== nullptr);
11282 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11283 m_builder
.reset (new struct buildsym_compunit
11284 (COMPUNIT_OBJFILE (cust
), "",
11285 COMPUNIT_DIRNAME (cust
),
11286 compunit_language (cust
),
11292 line_header
= lh
.release ();
11293 line_header_die_owner
= die
;
11297 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11299 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11300 still initializing it, and our caller (a few levels up)
11301 process_full_type_unit still needs to know if this is the first
11304 tu_group
->num_symtabs
= line_header
->file_names_size ();
11305 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11306 line_header
->file_names_size ());
11308 auto &file_names
= line_header
->file_names ();
11309 for (i
= 0; i
< file_names
.size (); ++i
)
11311 file_entry
&fe
= file_names
[i
];
11312 dwarf2_start_subfile (this, fe
.name
,
11313 fe
.include_dir (line_header
));
11314 buildsym_compunit
*b
= get_builder ();
11315 if (b
->get_current_subfile ()->symtab
== NULL
)
11317 /* NOTE: start_subfile will recognize when it's been
11318 passed a file it has already seen. So we can't
11319 assume there's a simple mapping from
11320 cu->line_header->file_names to subfiles, plus
11321 cu->line_header->file_names may contain dups. */
11322 b
->get_current_subfile ()->symtab
11323 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11326 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11327 tu_group
->symtabs
[i
] = fe
.symtab
;
11332 gdb_assert (m_builder
== nullptr);
11333 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11334 m_builder
.reset (new struct buildsym_compunit
11335 (COMPUNIT_OBJFILE (cust
), "",
11336 COMPUNIT_DIRNAME (cust
),
11337 compunit_language (cust
),
11340 auto &file_names
= line_header
->file_names ();
11341 for (i
= 0; i
< file_names
.size (); ++i
)
11343 file_entry
&fe
= file_names
[i
];
11344 fe
.symtab
= tu_group
->symtabs
[i
];
11348 /* The main symtab is allocated last. Type units don't have DW_AT_name
11349 so they don't have a "real" (so to speak) symtab anyway.
11350 There is later code that will assign the main symtab to all symbols
11351 that don't have one. We need to handle the case of a symbol with a
11352 missing symtab (DW_AT_decl_file) anyway. */
11355 /* Process DW_TAG_type_unit.
11356 For TUs we want to skip the first top level sibling if it's not the
11357 actual type being defined by this TU. In this case the first top
11358 level sibling is there to provide context only. */
11361 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11363 struct die_info
*child_die
;
11365 prepare_one_comp_unit (cu
, die
, language_minimal
);
11367 /* Initialize (or reinitialize) the machinery for building symtabs.
11368 We do this before processing child DIEs, so that the line header table
11369 is available for DW_AT_decl_file. */
11370 cu
->setup_type_unit_groups (die
);
11372 if (die
->child
!= NULL
)
11374 child_die
= die
->child
;
11375 while (child_die
&& child_die
->tag
)
11377 process_die (child_die
, cu
);
11378 child_die
= sibling_die (child_die
);
11385 http://gcc.gnu.org/wiki/DebugFission
11386 http://gcc.gnu.org/wiki/DebugFissionDWP
11388 To simplify handling of both DWO files ("object" files with the DWARF info)
11389 and DWP files (a file with the DWOs packaged up into one file), we treat
11390 DWP files as having a collection of virtual DWO files. */
11393 hash_dwo_file (const void *item
)
11395 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11398 hash
= htab_hash_string (dwo_file
->dwo_name
);
11399 if (dwo_file
->comp_dir
!= NULL
)
11400 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11405 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11407 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11408 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11410 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11412 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11413 return lhs
->comp_dir
== rhs
->comp_dir
;
11414 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11417 /* Allocate a hash table for DWO files. */
11420 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11422 auto delete_dwo_file
= [] (void *item
)
11424 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11429 return htab_up (htab_create_alloc_ex (41,
11433 &objfile
->objfile_obstack
,
11434 hashtab_obstack_allocate
,
11435 dummy_obstack_deallocate
));
11438 /* Lookup DWO file DWO_NAME. */
11441 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11442 const char *dwo_name
,
11443 const char *comp_dir
)
11445 struct dwo_file find_entry
;
11448 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11449 dwarf2_per_objfile
->dwo_files
11450 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11452 find_entry
.dwo_name
= dwo_name
;
11453 find_entry
.comp_dir
= comp_dir
;
11454 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11461 hash_dwo_unit (const void *item
)
11463 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11465 /* This drops the top 32 bits of the id, but is ok for a hash. */
11466 return dwo_unit
->signature
;
11470 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11472 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11473 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11475 /* The signature is assumed to be unique within the DWO file.
11476 So while object file CU dwo_id's always have the value zero,
11477 that's OK, assuming each object file DWO file has only one CU,
11478 and that's the rule for now. */
11479 return lhs
->signature
== rhs
->signature
;
11482 /* Allocate a hash table for DWO CUs,TUs.
11483 There is one of these tables for each of CUs,TUs for each DWO file. */
11486 allocate_dwo_unit_table (struct objfile
*objfile
)
11488 /* Start out with a pretty small number.
11489 Generally DWO files contain only one CU and maybe some TUs. */
11490 return htab_up (htab_create_alloc (3,
11493 NULL
, xcalloc
, xfree
));
11496 /* die_reader_func for create_dwo_cu. */
11499 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11500 const gdb_byte
*info_ptr
,
11501 struct die_info
*comp_unit_die
,
11502 struct dwo_file
*dwo_file
,
11503 struct dwo_unit
*dwo_unit
)
11505 struct dwarf2_cu
*cu
= reader
->cu
;
11506 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11507 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11509 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11510 if (!signature
.has_value ())
11512 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11513 " its dwo_id [in module %s]"),
11514 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11518 dwo_unit
->dwo_file
= dwo_file
;
11519 dwo_unit
->signature
= *signature
;
11520 dwo_unit
->section
= section
;
11521 dwo_unit
->sect_off
= sect_off
;
11522 dwo_unit
->length
= cu
->per_cu
->length
;
11524 if (dwarf_read_debug
)
11525 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11526 sect_offset_str (sect_off
),
11527 hex_string (dwo_unit
->signature
));
11530 /* Create the dwo_units for the CUs in a DWO_FILE.
11531 Note: This function processes DWO files only, not DWP files. */
11534 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11535 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11536 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11538 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11539 const gdb_byte
*info_ptr
, *end_ptr
;
11541 section
.read (objfile
);
11542 info_ptr
= section
.buffer
;
11544 if (info_ptr
== NULL
)
11547 if (dwarf_read_debug
)
11549 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11550 section
.get_name (),
11551 section
.get_file_name ());
11554 end_ptr
= info_ptr
+ section
.size
;
11555 while (info_ptr
< end_ptr
)
11557 struct dwarf2_per_cu_data per_cu
;
11558 struct dwo_unit read_unit
{};
11559 struct dwo_unit
*dwo_unit
;
11561 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11563 memset (&per_cu
, 0, sizeof (per_cu
));
11564 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11565 per_cu
.is_debug_types
= 0;
11566 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11567 per_cu
.section
= §ion
;
11569 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11570 if (!reader
.dummy_p
)
11571 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11572 &dwo_file
, &read_unit
);
11573 info_ptr
+= per_cu
.length
;
11575 // If the unit could not be parsed, skip it.
11576 if (read_unit
.dwo_file
== NULL
)
11579 if (cus_htab
== NULL
)
11580 cus_htab
= allocate_dwo_unit_table (objfile
);
11582 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11583 *dwo_unit
= read_unit
;
11584 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11585 gdb_assert (slot
!= NULL
);
11588 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11589 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11591 complaint (_("debug cu entry at offset %s is duplicate to"
11592 " the entry at offset %s, signature %s"),
11593 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11594 hex_string (dwo_unit
->signature
));
11596 *slot
= (void *)dwo_unit
;
11600 /* DWP file .debug_{cu,tu}_index section format:
11601 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11605 Both index sections have the same format, and serve to map a 64-bit
11606 signature to a set of section numbers. Each section begins with a header,
11607 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11608 indexes, and a pool of 32-bit section numbers. The index sections will be
11609 aligned at 8-byte boundaries in the file.
11611 The index section header consists of:
11613 V, 32 bit version number
11615 N, 32 bit number of compilation units or type units in the index
11616 M, 32 bit number of slots in the hash table
11618 Numbers are recorded using the byte order of the application binary.
11620 The hash table begins at offset 16 in the section, and consists of an array
11621 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11622 order of the application binary). Unused slots in the hash table are 0.
11623 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11625 The parallel table begins immediately after the hash table
11626 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11627 array of 32-bit indexes (using the byte order of the application binary),
11628 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11629 table contains a 32-bit index into the pool of section numbers. For unused
11630 hash table slots, the corresponding entry in the parallel table will be 0.
11632 The pool of section numbers begins immediately following the hash table
11633 (at offset 16 + 12 * M from the beginning of the section). The pool of
11634 section numbers consists of an array of 32-bit words (using the byte order
11635 of the application binary). Each item in the array is indexed starting
11636 from 0. The hash table entry provides the index of the first section
11637 number in the set. Additional section numbers in the set follow, and the
11638 set is terminated by a 0 entry (section number 0 is not used in ELF).
11640 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11641 section must be the first entry in the set, and the .debug_abbrev.dwo must
11642 be the second entry. Other members of the set may follow in any order.
11648 DWP Version 2 combines all the .debug_info, etc. sections into one,
11649 and the entries in the index tables are now offsets into these sections.
11650 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11653 Index Section Contents:
11655 Hash Table of Signatures dwp_hash_table.hash_table
11656 Parallel Table of Indices dwp_hash_table.unit_table
11657 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11658 Table of Section Sizes dwp_hash_table.v2.sizes
11660 The index section header consists of:
11662 V, 32 bit version number
11663 L, 32 bit number of columns in the table of section offsets
11664 N, 32 bit number of compilation units or type units in the index
11665 M, 32 bit number of slots in the hash table
11667 Numbers are recorded using the byte order of the application binary.
11669 The hash table has the same format as version 1.
11670 The parallel table of indices has the same format as version 1,
11671 except that the entries are origin-1 indices into the table of sections
11672 offsets and the table of section sizes.
11674 The table of offsets begins immediately following the parallel table
11675 (at offset 16 + 12 * M from the beginning of the section). The table is
11676 a two-dimensional array of 32-bit words (using the byte order of the
11677 application binary), with L columns and N+1 rows, in row-major order.
11678 Each row in the array is indexed starting from 0. The first row provides
11679 a key to the remaining rows: each column in this row provides an identifier
11680 for a debug section, and the offsets in the same column of subsequent rows
11681 refer to that section. The section identifiers are:
11683 DW_SECT_INFO 1 .debug_info.dwo
11684 DW_SECT_TYPES 2 .debug_types.dwo
11685 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11686 DW_SECT_LINE 4 .debug_line.dwo
11687 DW_SECT_LOC 5 .debug_loc.dwo
11688 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11689 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11690 DW_SECT_MACRO 8 .debug_macro.dwo
11692 The offsets provided by the CU and TU index sections are the base offsets
11693 for the contributions made by each CU or TU to the corresponding section
11694 in the package file. Each CU and TU header contains an abbrev_offset
11695 field, used to find the abbreviations table for that CU or TU within the
11696 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11697 be interpreted as relative to the base offset given in the index section.
11698 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11699 should be interpreted as relative to the base offset for .debug_line.dwo,
11700 and offsets into other debug sections obtained from DWARF attributes should
11701 also be interpreted as relative to the corresponding base offset.
11703 The table of sizes begins immediately following the table of offsets.
11704 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11705 with L columns and N rows, in row-major order. Each row in the array is
11706 indexed starting from 1 (row 0 is shared by the two tables).
11710 Hash table lookup is handled the same in version 1 and 2:
11712 We assume that N and M will not exceed 2^32 - 1.
11713 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11715 Given a 64-bit compilation unit signature or a type signature S, an entry
11716 in the hash table is located as follows:
11718 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11719 the low-order k bits all set to 1.
11721 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11723 3) If the hash table entry at index H matches the signature, use that
11724 entry. If the hash table entry at index H is unused (all zeroes),
11725 terminate the search: the signature is not present in the table.
11727 4) Let H = (H + H') modulo M. Repeat at Step 3.
11729 Because M > N and H' and M are relatively prime, the search is guaranteed
11730 to stop at an unused slot or find the match. */
11732 /* Create a hash table to map DWO IDs to their CU/TU entry in
11733 .debug_{info,types}.dwo in DWP_FILE.
11734 Returns NULL if there isn't one.
11735 Note: This function processes DWP files only, not DWO files. */
11737 static struct dwp_hash_table
*
11738 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11739 struct dwp_file
*dwp_file
, int is_debug_types
)
11741 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11742 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11743 const gdb_byte
*index_ptr
, *index_end
;
11744 struct dwarf2_section_info
*index
;
11745 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11746 struct dwp_hash_table
*htab
;
11748 if (is_debug_types
)
11749 index
= &dwp_file
->sections
.tu_index
;
11751 index
= &dwp_file
->sections
.cu_index
;
11753 if (index
->empty ())
11755 index
->read (objfile
);
11757 index_ptr
= index
->buffer
;
11758 index_end
= index_ptr
+ index
->size
;
11760 version
= read_4_bytes (dbfd
, index_ptr
);
11763 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11767 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11769 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11772 if (version
!= 1 && version
!= 2)
11774 error (_("Dwarf Error: unsupported DWP file version (%s)"
11775 " [in module %s]"),
11776 pulongest (version
), dwp_file
->name
);
11778 if (nr_slots
!= (nr_slots
& -nr_slots
))
11780 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11781 " is not power of 2 [in module %s]"),
11782 pulongest (nr_slots
), dwp_file
->name
);
11785 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11786 htab
->version
= version
;
11787 htab
->nr_columns
= nr_columns
;
11788 htab
->nr_units
= nr_units
;
11789 htab
->nr_slots
= nr_slots
;
11790 htab
->hash_table
= index_ptr
;
11791 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11793 /* Exit early if the table is empty. */
11794 if (nr_slots
== 0 || nr_units
== 0
11795 || (version
== 2 && nr_columns
== 0))
11797 /* All must be zero. */
11798 if (nr_slots
!= 0 || nr_units
!= 0
11799 || (version
== 2 && nr_columns
!= 0))
11801 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11802 " all zero [in modules %s]"),
11810 htab
->section_pool
.v1
.indices
=
11811 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11812 /* It's harder to decide whether the section is too small in v1.
11813 V1 is deprecated anyway so we punt. */
11817 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11818 int *ids
= htab
->section_pool
.v2
.section_ids
;
11819 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11820 /* Reverse map for error checking. */
11821 int ids_seen
[DW_SECT_MAX
+ 1];
11824 if (nr_columns
< 2)
11826 error (_("Dwarf Error: bad DWP hash table, too few columns"
11827 " in section table [in module %s]"),
11830 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11832 error (_("Dwarf Error: bad DWP hash table, too many columns"
11833 " in section table [in module %s]"),
11836 memset (ids
, 255, sizeof_ids
);
11837 memset (ids_seen
, 255, sizeof (ids_seen
));
11838 for (i
= 0; i
< nr_columns
; ++i
)
11840 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11842 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11844 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11845 " in section table [in module %s]"),
11846 id
, dwp_file
->name
);
11848 if (ids_seen
[id
] != -1)
11850 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11851 " id %d in section table [in module %s]"),
11852 id
, dwp_file
->name
);
11857 /* Must have exactly one info or types section. */
11858 if (((ids_seen
[DW_SECT_INFO
] != -1)
11859 + (ids_seen
[DW_SECT_TYPES
] != -1))
11862 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11863 " DWO info/types section [in module %s]"),
11866 /* Must have an abbrev section. */
11867 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11869 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11870 " section [in module %s]"),
11873 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11874 htab
->section_pool
.v2
.sizes
=
11875 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11876 * nr_units
* nr_columns
);
11877 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11878 * nr_units
* nr_columns
))
11881 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11882 " [in module %s]"),
11890 /* Update SECTIONS with the data from SECTP.
11892 This function is like the other "locate" section routines that are
11893 passed to bfd_map_over_sections, but in this context the sections to
11894 read comes from the DWP V1 hash table, not the full ELF section table.
11896 The result is non-zero for success, or zero if an error was found. */
11899 locate_v1_virtual_dwo_sections (asection
*sectp
,
11900 struct virtual_v1_dwo_sections
*sections
)
11902 const struct dwop_section_names
*names
= &dwop_section_names
;
11904 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11906 /* There can be only one. */
11907 if (sections
->abbrev
.s
.section
!= NULL
)
11909 sections
->abbrev
.s
.section
= sectp
;
11910 sections
->abbrev
.size
= bfd_section_size (sectp
);
11912 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11913 || section_is_p (sectp
->name
, &names
->types_dwo
))
11915 /* There can be only one. */
11916 if (sections
->info_or_types
.s
.section
!= NULL
)
11918 sections
->info_or_types
.s
.section
= sectp
;
11919 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11921 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11923 /* There can be only one. */
11924 if (sections
->line
.s
.section
!= NULL
)
11926 sections
->line
.s
.section
= sectp
;
11927 sections
->line
.size
= bfd_section_size (sectp
);
11929 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11931 /* There can be only one. */
11932 if (sections
->loc
.s
.section
!= NULL
)
11934 sections
->loc
.s
.section
= sectp
;
11935 sections
->loc
.size
= bfd_section_size (sectp
);
11937 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11939 /* There can be only one. */
11940 if (sections
->macinfo
.s
.section
!= NULL
)
11942 sections
->macinfo
.s
.section
= sectp
;
11943 sections
->macinfo
.size
= bfd_section_size (sectp
);
11945 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11947 /* There can be only one. */
11948 if (sections
->macro
.s
.section
!= NULL
)
11950 sections
->macro
.s
.section
= sectp
;
11951 sections
->macro
.size
= bfd_section_size (sectp
);
11953 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11955 /* There can be only one. */
11956 if (sections
->str_offsets
.s
.section
!= NULL
)
11958 sections
->str_offsets
.s
.section
= sectp
;
11959 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11963 /* No other kind of section is valid. */
11970 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11971 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11972 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11973 This is for DWP version 1 files. */
11975 static struct dwo_unit
*
11976 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11977 struct dwp_file
*dwp_file
,
11978 uint32_t unit_index
,
11979 const char *comp_dir
,
11980 ULONGEST signature
, int is_debug_types
)
11982 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11983 const struct dwp_hash_table
*dwp_htab
=
11984 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11985 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11986 const char *kind
= is_debug_types
? "TU" : "CU";
11987 struct dwo_file
*dwo_file
;
11988 struct dwo_unit
*dwo_unit
;
11989 struct virtual_v1_dwo_sections sections
;
11990 void **dwo_file_slot
;
11993 gdb_assert (dwp_file
->version
== 1);
11995 if (dwarf_read_debug
)
11997 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11999 pulongest (unit_index
), hex_string (signature
),
12003 /* Fetch the sections of this DWO unit.
12004 Put a limit on the number of sections we look for so that bad data
12005 doesn't cause us to loop forever. */
12007 #define MAX_NR_V1_DWO_SECTIONS \
12008 (1 /* .debug_info or .debug_types */ \
12009 + 1 /* .debug_abbrev */ \
12010 + 1 /* .debug_line */ \
12011 + 1 /* .debug_loc */ \
12012 + 1 /* .debug_str_offsets */ \
12013 + 1 /* .debug_macro or .debug_macinfo */ \
12014 + 1 /* trailing zero */)
12016 memset (§ions
, 0, sizeof (sections
));
12018 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12021 uint32_t section_nr
=
12022 read_4_bytes (dbfd
,
12023 dwp_htab
->section_pool
.v1
.indices
12024 + (unit_index
+ i
) * sizeof (uint32_t));
12026 if (section_nr
== 0)
12028 if (section_nr
>= dwp_file
->num_sections
)
12030 error (_("Dwarf Error: bad DWP hash table, section number too large"
12031 " [in module %s]"),
12035 sectp
= dwp_file
->elf_sections
[section_nr
];
12036 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12038 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12039 " [in module %s]"),
12045 || sections
.info_or_types
.empty ()
12046 || sections
.abbrev
.empty ())
12048 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12049 " [in module %s]"),
12052 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12054 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12055 " [in module %s]"),
12059 /* It's easier for the rest of the code if we fake a struct dwo_file and
12060 have dwo_unit "live" in that. At least for now.
12062 The DWP file can be made up of a random collection of CUs and TUs.
12063 However, for each CU + set of TUs that came from the same original DWO
12064 file, we can combine them back into a virtual DWO file to save space
12065 (fewer struct dwo_file objects to allocate). Remember that for really
12066 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12068 std::string virtual_dwo_name
=
12069 string_printf ("virtual-dwo/%d-%d-%d-%d",
12070 sections
.abbrev
.get_id (),
12071 sections
.line
.get_id (),
12072 sections
.loc
.get_id (),
12073 sections
.str_offsets
.get_id ());
12074 /* Can we use an existing virtual DWO file? */
12075 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12076 virtual_dwo_name
.c_str (),
12078 /* Create one if necessary. */
12079 if (*dwo_file_slot
== NULL
)
12081 if (dwarf_read_debug
)
12083 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12084 virtual_dwo_name
.c_str ());
12086 dwo_file
= new struct dwo_file
;
12087 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12089 dwo_file
->comp_dir
= comp_dir
;
12090 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12091 dwo_file
->sections
.line
= sections
.line
;
12092 dwo_file
->sections
.loc
= sections
.loc
;
12093 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12094 dwo_file
->sections
.macro
= sections
.macro
;
12095 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12096 /* The "str" section is global to the entire DWP file. */
12097 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12098 /* The info or types section is assigned below to dwo_unit,
12099 there's no need to record it in dwo_file.
12100 Also, we can't simply record type sections in dwo_file because
12101 we record a pointer into the vector in dwo_unit. As we collect more
12102 types we'll grow the vector and eventually have to reallocate space
12103 for it, invalidating all copies of pointers into the previous
12105 *dwo_file_slot
= dwo_file
;
12109 if (dwarf_read_debug
)
12111 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12112 virtual_dwo_name
.c_str ());
12114 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12117 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12118 dwo_unit
->dwo_file
= dwo_file
;
12119 dwo_unit
->signature
= signature
;
12120 dwo_unit
->section
=
12121 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12122 *dwo_unit
->section
= sections
.info_or_types
;
12123 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12128 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12129 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12130 piece within that section used by a TU/CU, return a virtual section
12131 of just that piece. */
12133 static struct dwarf2_section_info
12134 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12135 struct dwarf2_section_info
*section
,
12136 bfd_size_type offset
, bfd_size_type size
)
12138 struct dwarf2_section_info result
;
12141 gdb_assert (section
!= NULL
);
12142 gdb_assert (!section
->is_virtual
);
12144 memset (&result
, 0, sizeof (result
));
12145 result
.s
.containing_section
= section
;
12146 result
.is_virtual
= true;
12151 sectp
= section
->get_bfd_section ();
12153 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12154 bounds of the real section. This is a pretty-rare event, so just
12155 flag an error (easier) instead of a warning and trying to cope. */
12157 || offset
+ size
> bfd_section_size (sectp
))
12159 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12160 " in section %s [in module %s]"),
12161 sectp
? bfd_section_name (sectp
) : "<unknown>",
12162 objfile_name (dwarf2_per_objfile
->objfile
));
12165 result
.virtual_offset
= offset
;
12166 result
.size
= size
;
12170 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12171 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12172 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12173 This is for DWP version 2 files. */
12175 static struct dwo_unit
*
12176 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12177 struct dwp_file
*dwp_file
,
12178 uint32_t unit_index
,
12179 const char *comp_dir
,
12180 ULONGEST signature
, int is_debug_types
)
12182 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12183 const struct dwp_hash_table
*dwp_htab
=
12184 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12185 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12186 const char *kind
= is_debug_types
? "TU" : "CU";
12187 struct dwo_file
*dwo_file
;
12188 struct dwo_unit
*dwo_unit
;
12189 struct virtual_v2_dwo_sections sections
;
12190 void **dwo_file_slot
;
12193 gdb_assert (dwp_file
->version
== 2);
12195 if (dwarf_read_debug
)
12197 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12199 pulongest (unit_index
), hex_string (signature
),
12203 /* Fetch the section offsets of this DWO unit. */
12205 memset (§ions
, 0, sizeof (sections
));
12207 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12209 uint32_t offset
= read_4_bytes (dbfd
,
12210 dwp_htab
->section_pool
.v2
.offsets
12211 + (((unit_index
- 1) * dwp_htab
->nr_columns
12213 * sizeof (uint32_t)));
12214 uint32_t size
= read_4_bytes (dbfd
,
12215 dwp_htab
->section_pool
.v2
.sizes
12216 + (((unit_index
- 1) * dwp_htab
->nr_columns
12218 * sizeof (uint32_t)));
12220 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12223 case DW_SECT_TYPES
:
12224 sections
.info_or_types_offset
= offset
;
12225 sections
.info_or_types_size
= size
;
12227 case DW_SECT_ABBREV
:
12228 sections
.abbrev_offset
= offset
;
12229 sections
.abbrev_size
= size
;
12232 sections
.line_offset
= offset
;
12233 sections
.line_size
= size
;
12236 sections
.loc_offset
= offset
;
12237 sections
.loc_size
= size
;
12239 case DW_SECT_STR_OFFSETS
:
12240 sections
.str_offsets_offset
= offset
;
12241 sections
.str_offsets_size
= size
;
12243 case DW_SECT_MACINFO
:
12244 sections
.macinfo_offset
= offset
;
12245 sections
.macinfo_size
= size
;
12247 case DW_SECT_MACRO
:
12248 sections
.macro_offset
= offset
;
12249 sections
.macro_size
= size
;
12254 /* It's easier for the rest of the code if we fake a struct dwo_file and
12255 have dwo_unit "live" in that. At least for now.
12257 The DWP file can be made up of a random collection of CUs and TUs.
12258 However, for each CU + set of TUs that came from the same original DWO
12259 file, we can combine them back into a virtual DWO file to save space
12260 (fewer struct dwo_file objects to allocate). Remember that for really
12261 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12263 std::string virtual_dwo_name
=
12264 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12265 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12266 (long) (sections
.line_size
? sections
.line_offset
: 0),
12267 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12268 (long) (sections
.str_offsets_size
12269 ? sections
.str_offsets_offset
: 0));
12270 /* Can we use an existing virtual DWO file? */
12271 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12272 virtual_dwo_name
.c_str (),
12274 /* Create one if necessary. */
12275 if (*dwo_file_slot
== NULL
)
12277 if (dwarf_read_debug
)
12279 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12280 virtual_dwo_name
.c_str ());
12282 dwo_file
= new struct dwo_file
;
12283 dwo_file
->dwo_name
= obstack_strdup (&objfile
->objfile_obstack
,
12285 dwo_file
->comp_dir
= comp_dir
;
12286 dwo_file
->sections
.abbrev
=
12287 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12288 sections
.abbrev_offset
, sections
.abbrev_size
);
12289 dwo_file
->sections
.line
=
12290 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12291 sections
.line_offset
, sections
.line_size
);
12292 dwo_file
->sections
.loc
=
12293 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12294 sections
.loc_offset
, sections
.loc_size
);
12295 dwo_file
->sections
.macinfo
=
12296 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12297 sections
.macinfo_offset
, sections
.macinfo_size
);
12298 dwo_file
->sections
.macro
=
12299 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12300 sections
.macro_offset
, sections
.macro_size
);
12301 dwo_file
->sections
.str_offsets
=
12302 create_dwp_v2_section (dwarf2_per_objfile
,
12303 &dwp_file
->sections
.str_offsets
,
12304 sections
.str_offsets_offset
,
12305 sections
.str_offsets_size
);
12306 /* The "str" section is global to the entire DWP file. */
12307 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12308 /* The info or types section is assigned below to dwo_unit,
12309 there's no need to record it in dwo_file.
12310 Also, we can't simply record type sections in dwo_file because
12311 we record a pointer into the vector in dwo_unit. As we collect more
12312 types we'll grow the vector and eventually have to reallocate space
12313 for it, invalidating all copies of pointers into the previous
12315 *dwo_file_slot
= dwo_file
;
12319 if (dwarf_read_debug
)
12321 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12322 virtual_dwo_name
.c_str ());
12324 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12327 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12328 dwo_unit
->dwo_file
= dwo_file
;
12329 dwo_unit
->signature
= signature
;
12330 dwo_unit
->section
=
12331 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12332 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12334 ? &dwp_file
->sections
.types
12335 : &dwp_file
->sections
.info
,
12336 sections
.info_or_types_offset
,
12337 sections
.info_or_types_size
);
12338 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12343 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12344 Returns NULL if the signature isn't found. */
12346 static struct dwo_unit
*
12347 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12348 struct dwp_file
*dwp_file
, const char *comp_dir
,
12349 ULONGEST signature
, int is_debug_types
)
12351 const struct dwp_hash_table
*dwp_htab
=
12352 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12353 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12354 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12355 uint32_t hash
= signature
& mask
;
12356 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12359 struct dwo_unit find_dwo_cu
;
12361 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12362 find_dwo_cu
.signature
= signature
;
12363 slot
= htab_find_slot (is_debug_types
12364 ? dwp_file
->loaded_tus
12365 : dwp_file
->loaded_cus
,
12366 &find_dwo_cu
, INSERT
);
12369 return (struct dwo_unit
*) *slot
;
12371 /* Use a for loop so that we don't loop forever on bad debug info. */
12372 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12374 ULONGEST signature_in_table
;
12376 signature_in_table
=
12377 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12378 if (signature_in_table
== signature
)
12380 uint32_t unit_index
=
12381 read_4_bytes (dbfd
,
12382 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12384 if (dwp_file
->version
== 1)
12386 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12387 dwp_file
, unit_index
,
12388 comp_dir
, signature
,
12393 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12394 dwp_file
, unit_index
,
12395 comp_dir
, signature
,
12398 return (struct dwo_unit
*) *slot
;
12400 if (signature_in_table
== 0)
12402 hash
= (hash
+ hash2
) & mask
;
12405 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12406 " [in module %s]"),
12410 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12411 Open the file specified by FILE_NAME and hand it off to BFD for
12412 preliminary analysis. Return a newly initialized bfd *, which
12413 includes a canonicalized copy of FILE_NAME.
12414 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12415 SEARCH_CWD is true if the current directory is to be searched.
12416 It will be searched before debug-file-directory.
12417 If successful, the file is added to the bfd include table of the
12418 objfile's bfd (see gdb_bfd_record_inclusion).
12419 If unable to find/open the file, return NULL.
12420 NOTE: This function is derived from symfile_bfd_open. */
12422 static gdb_bfd_ref_ptr
12423 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12424 const char *file_name
, int is_dwp
, int search_cwd
)
12427 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12428 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12429 to debug_file_directory. */
12430 const char *search_path
;
12431 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12433 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12436 if (*debug_file_directory
!= '\0')
12438 search_path_holder
.reset (concat (".", dirname_separator_string
,
12439 debug_file_directory
,
12441 search_path
= search_path_holder
.get ();
12447 search_path
= debug_file_directory
;
12449 openp_flags flags
= OPF_RETURN_REALPATH
;
12451 flags
|= OPF_SEARCH_IN_PATH
;
12453 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12454 desc
= openp (search_path
, flags
, file_name
,
12455 O_RDONLY
| O_BINARY
, &absolute_name
);
12459 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12461 if (sym_bfd
== NULL
)
12463 bfd_set_cacheable (sym_bfd
.get (), 1);
12465 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12468 /* Success. Record the bfd as having been included by the objfile's bfd.
12469 This is important because things like demangled_names_hash lives in the
12470 objfile's per_bfd space and may have references to things like symbol
12471 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12472 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12477 /* Try to open DWO file FILE_NAME.
12478 COMP_DIR is the DW_AT_comp_dir attribute.
12479 The result is the bfd handle of the file.
12480 If there is a problem finding or opening the file, return NULL.
12481 Upon success, the canonicalized path of the file is stored in the bfd,
12482 same as symfile_bfd_open. */
12484 static gdb_bfd_ref_ptr
12485 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12486 const char *file_name
, const char *comp_dir
)
12488 if (IS_ABSOLUTE_PATH (file_name
))
12489 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12490 0 /*is_dwp*/, 0 /*search_cwd*/);
12492 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12494 if (comp_dir
!= NULL
)
12496 gdb::unique_xmalloc_ptr
<char> path_to_try
12497 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12499 /* NOTE: If comp_dir is a relative path, this will also try the
12500 search path, which seems useful. */
12501 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12502 path_to_try
.get (),
12504 1 /*search_cwd*/));
12509 /* That didn't work, try debug-file-directory, which, despite its name,
12510 is a list of paths. */
12512 if (*debug_file_directory
== '\0')
12515 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12516 0 /*is_dwp*/, 1 /*search_cwd*/);
12519 /* This function is mapped across the sections and remembers the offset and
12520 size of each of the DWO debugging sections we are interested in. */
12523 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12525 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12526 const struct dwop_section_names
*names
= &dwop_section_names
;
12528 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12530 dwo_sections
->abbrev
.s
.section
= sectp
;
12531 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12533 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12535 dwo_sections
->info
.s
.section
= sectp
;
12536 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12538 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12540 dwo_sections
->line
.s
.section
= sectp
;
12541 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12543 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12545 dwo_sections
->loc
.s
.section
= sectp
;
12546 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12548 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12550 dwo_sections
->macinfo
.s
.section
= sectp
;
12551 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12553 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12555 dwo_sections
->macro
.s
.section
= sectp
;
12556 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12558 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12560 dwo_sections
->str
.s
.section
= sectp
;
12561 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12563 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12565 dwo_sections
->str_offsets
.s
.section
= sectp
;
12566 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12568 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12570 struct dwarf2_section_info type_section
;
12572 memset (&type_section
, 0, sizeof (type_section
));
12573 type_section
.s
.section
= sectp
;
12574 type_section
.size
= bfd_section_size (sectp
);
12575 dwo_sections
->types
.push_back (type_section
);
12579 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12580 by PER_CU. This is for the non-DWP case.
12581 The result is NULL if DWO_NAME can't be found. */
12583 static struct dwo_file
*
12584 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12585 const char *dwo_name
, const char *comp_dir
)
12587 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12589 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12592 if (dwarf_read_debug
)
12593 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12597 dwo_file_up
dwo_file (new struct dwo_file
);
12598 dwo_file
->dwo_name
= dwo_name
;
12599 dwo_file
->comp_dir
= comp_dir
;
12600 dwo_file
->dbfd
= std::move (dbfd
);
12602 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12603 &dwo_file
->sections
);
12605 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12606 dwo_file
->sections
.info
, dwo_file
->cus
);
12608 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12609 dwo_file
->sections
.types
, dwo_file
->tus
);
12611 if (dwarf_read_debug
)
12612 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12614 return dwo_file
.release ();
12617 /* This function is mapped across the sections and remembers the offset and
12618 size of each of the DWP debugging sections common to version 1 and 2 that
12619 we are interested in. */
12622 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12623 void *dwp_file_ptr
)
12625 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12626 const struct dwop_section_names
*names
= &dwop_section_names
;
12627 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12629 /* Record the ELF section number for later lookup: this is what the
12630 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12631 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12632 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12634 /* Look for specific sections that we need. */
12635 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12637 dwp_file
->sections
.str
.s
.section
= sectp
;
12638 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12640 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12642 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12643 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12645 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12647 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12648 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12652 /* This function is mapped across the sections and remembers the offset and
12653 size of each of the DWP version 2 debugging sections that we are interested
12654 in. This is split into a separate function because we don't know if we
12655 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12658 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12660 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12661 const struct dwop_section_names
*names
= &dwop_section_names
;
12662 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12664 /* Record the ELF section number for later lookup: this is what the
12665 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12666 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12667 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12669 /* Look for specific sections that we need. */
12670 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12672 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12673 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12675 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12677 dwp_file
->sections
.info
.s
.section
= sectp
;
12678 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12680 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12682 dwp_file
->sections
.line
.s
.section
= sectp
;
12683 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12685 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12687 dwp_file
->sections
.loc
.s
.section
= sectp
;
12688 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12690 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12692 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12693 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12695 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12697 dwp_file
->sections
.macro
.s
.section
= sectp
;
12698 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12700 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12702 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12703 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12705 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12707 dwp_file
->sections
.types
.s
.section
= sectp
;
12708 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12712 /* Hash function for dwp_file loaded CUs/TUs. */
12715 hash_dwp_loaded_cutus (const void *item
)
12717 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12719 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12720 return dwo_unit
->signature
;
12723 /* Equality function for dwp_file loaded CUs/TUs. */
12726 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12728 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12729 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12731 return dua
->signature
== dub
->signature
;
12734 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12737 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
12739 return htab_create_alloc_ex (3,
12740 hash_dwp_loaded_cutus
,
12741 eq_dwp_loaded_cutus
,
12743 &objfile
->objfile_obstack
,
12744 hashtab_obstack_allocate
,
12745 dummy_obstack_deallocate
);
12748 /* Try to open DWP file FILE_NAME.
12749 The result is the bfd handle of the file.
12750 If there is a problem finding or opening the file, return NULL.
12751 Upon success, the canonicalized path of the file is stored in the bfd,
12752 same as symfile_bfd_open. */
12754 static gdb_bfd_ref_ptr
12755 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12756 const char *file_name
)
12758 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12760 1 /*search_cwd*/));
12764 /* Work around upstream bug 15652.
12765 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12766 [Whether that's a "bug" is debatable, but it is getting in our way.]
12767 We have no real idea where the dwp file is, because gdb's realpath-ing
12768 of the executable's path may have discarded the needed info.
12769 [IWBN if the dwp file name was recorded in the executable, akin to
12770 .gnu_debuglink, but that doesn't exist yet.]
12771 Strip the directory from FILE_NAME and search again. */
12772 if (*debug_file_directory
!= '\0')
12774 /* Don't implicitly search the current directory here.
12775 If the user wants to search "." to handle this case,
12776 it must be added to debug-file-directory. */
12777 return try_open_dwop_file (dwarf2_per_objfile
,
12778 lbasename (file_name
), 1 /*is_dwp*/,
12785 /* Initialize the use of the DWP file for the current objfile.
12786 By convention the name of the DWP file is ${objfile}.dwp.
12787 The result is NULL if it can't be found. */
12789 static std::unique_ptr
<struct dwp_file
>
12790 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12792 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12794 /* Try to find first .dwp for the binary file before any symbolic links
12797 /* If the objfile is a debug file, find the name of the real binary
12798 file and get the name of dwp file from there. */
12799 std::string dwp_name
;
12800 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12802 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12803 const char *backlink_basename
= lbasename (backlink
->original_name
);
12805 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12808 dwp_name
= objfile
->original_name
;
12810 dwp_name
+= ".dwp";
12812 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12814 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12816 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12817 dwp_name
= objfile_name (objfile
);
12818 dwp_name
+= ".dwp";
12819 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12824 if (dwarf_read_debug
)
12825 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12826 return std::unique_ptr
<dwp_file
> ();
12829 const char *name
= bfd_get_filename (dbfd
.get ());
12830 std::unique_ptr
<struct dwp_file
> dwp_file
12831 (new struct dwp_file (name
, std::move (dbfd
)));
12833 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12834 dwp_file
->elf_sections
=
12835 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12836 dwp_file
->num_sections
, asection
*);
12838 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12839 dwarf2_locate_common_dwp_sections
,
12842 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12845 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12848 /* The DWP file version is stored in the hash table. Oh well. */
12849 if (dwp_file
->cus
&& dwp_file
->tus
12850 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12852 /* Technically speaking, we should try to limp along, but this is
12853 pretty bizarre. We use pulongest here because that's the established
12854 portability solution (e.g, we cannot use %u for uint32_t). */
12855 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12856 " TU version %s [in DWP file %s]"),
12857 pulongest (dwp_file
->cus
->version
),
12858 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12862 dwp_file
->version
= dwp_file
->cus
->version
;
12863 else if (dwp_file
->tus
)
12864 dwp_file
->version
= dwp_file
->tus
->version
;
12866 dwp_file
->version
= 2;
12868 if (dwp_file
->version
== 2)
12869 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12870 dwarf2_locate_v2_dwp_sections
,
12873 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
12874 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
12876 if (dwarf_read_debug
)
12878 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12879 fprintf_unfiltered (gdb_stdlog
,
12880 " %s CUs, %s TUs\n",
12881 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12882 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12888 /* Wrapper around open_and_init_dwp_file, only open it once. */
12890 static struct dwp_file
*
12891 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12893 if (! dwarf2_per_objfile
->dwp_checked
)
12895 dwarf2_per_objfile
->dwp_file
12896 = open_and_init_dwp_file (dwarf2_per_objfile
);
12897 dwarf2_per_objfile
->dwp_checked
= 1;
12899 return dwarf2_per_objfile
->dwp_file
.get ();
12902 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12903 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12904 or in the DWP file for the objfile, referenced by THIS_UNIT.
12905 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12906 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12908 This is called, for example, when wanting to read a variable with a
12909 complex location. Therefore we don't want to do file i/o for every call.
12910 Therefore we don't want to look for a DWO file on every call.
12911 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12912 then we check if we've already seen DWO_NAME, and only THEN do we check
12915 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12916 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12918 static struct dwo_unit
*
12919 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12920 const char *dwo_name
, const char *comp_dir
,
12921 ULONGEST signature
, int is_debug_types
)
12923 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12924 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12925 const char *kind
= is_debug_types
? "TU" : "CU";
12926 void **dwo_file_slot
;
12927 struct dwo_file
*dwo_file
;
12928 struct dwp_file
*dwp_file
;
12930 /* First see if there's a DWP file.
12931 If we have a DWP file but didn't find the DWO inside it, don't
12932 look for the original DWO file. It makes gdb behave differently
12933 depending on whether one is debugging in the build tree. */
12935 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12936 if (dwp_file
!= NULL
)
12938 const struct dwp_hash_table
*dwp_htab
=
12939 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12941 if (dwp_htab
!= NULL
)
12943 struct dwo_unit
*dwo_cutu
=
12944 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12945 signature
, is_debug_types
);
12947 if (dwo_cutu
!= NULL
)
12949 if (dwarf_read_debug
)
12951 fprintf_unfiltered (gdb_stdlog
,
12952 "Virtual DWO %s %s found: @%s\n",
12953 kind
, hex_string (signature
),
12954 host_address_to_string (dwo_cutu
));
12962 /* No DWP file, look for the DWO file. */
12964 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12965 dwo_name
, comp_dir
);
12966 if (*dwo_file_slot
== NULL
)
12968 /* Read in the file and build a table of the CUs/TUs it contains. */
12969 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12971 /* NOTE: This will be NULL if unable to open the file. */
12972 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12974 if (dwo_file
!= NULL
)
12976 struct dwo_unit
*dwo_cutu
= NULL
;
12978 if (is_debug_types
&& dwo_file
->tus
)
12980 struct dwo_unit find_dwo_cutu
;
12982 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12983 find_dwo_cutu
.signature
= signature
;
12985 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12988 else if (!is_debug_types
&& dwo_file
->cus
)
12990 struct dwo_unit find_dwo_cutu
;
12992 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12993 find_dwo_cutu
.signature
= signature
;
12994 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12998 if (dwo_cutu
!= NULL
)
13000 if (dwarf_read_debug
)
13002 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13003 kind
, dwo_name
, hex_string (signature
),
13004 host_address_to_string (dwo_cutu
));
13011 /* We didn't find it. This could mean a dwo_id mismatch, or
13012 someone deleted the DWO/DWP file, or the search path isn't set up
13013 correctly to find the file. */
13015 if (dwarf_read_debug
)
13017 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13018 kind
, dwo_name
, hex_string (signature
));
13021 /* This is a warning and not a complaint because it can be caused by
13022 pilot error (e.g., user accidentally deleting the DWO). */
13024 /* Print the name of the DWP file if we looked there, helps the user
13025 better diagnose the problem. */
13026 std::string dwp_text
;
13028 if (dwp_file
!= NULL
)
13029 dwp_text
= string_printf (" [in DWP file %s]",
13030 lbasename (dwp_file
->name
));
13032 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13033 " [in module %s]"),
13034 kind
, dwo_name
, hex_string (signature
),
13036 this_unit
->is_debug_types
? "TU" : "CU",
13037 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13042 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13043 See lookup_dwo_cutu_unit for details. */
13045 static struct dwo_unit
*
13046 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13047 const char *dwo_name
, const char *comp_dir
,
13048 ULONGEST signature
)
13050 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13053 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13054 See lookup_dwo_cutu_unit for details. */
13056 static struct dwo_unit
*
13057 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13058 const char *dwo_name
, const char *comp_dir
)
13060 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13063 /* Traversal function for queue_and_load_all_dwo_tus. */
13066 queue_and_load_dwo_tu (void **slot
, void *info
)
13068 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13069 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13070 ULONGEST signature
= dwo_unit
->signature
;
13071 struct signatured_type
*sig_type
=
13072 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13074 if (sig_type
!= NULL
)
13076 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13078 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13079 a real dependency of PER_CU on SIG_TYPE. That is detected later
13080 while processing PER_CU. */
13081 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13082 load_full_type_unit (sig_cu
);
13083 per_cu
->imported_symtabs_push (sig_cu
);
13089 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13090 The DWO may have the only definition of the type, though it may not be
13091 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13092 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13095 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13097 struct dwo_unit
*dwo_unit
;
13098 struct dwo_file
*dwo_file
;
13100 gdb_assert (!per_cu
->is_debug_types
);
13101 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13102 gdb_assert (per_cu
->cu
!= NULL
);
13104 dwo_unit
= per_cu
->cu
->dwo_unit
;
13105 gdb_assert (dwo_unit
!= NULL
);
13107 dwo_file
= dwo_unit
->dwo_file
;
13108 if (dwo_file
->tus
!= NULL
)
13109 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
13113 /* Read in various DIEs. */
13115 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13116 Inherit only the children of the DW_AT_abstract_origin DIE not being
13117 already referenced by DW_AT_abstract_origin from the children of the
13121 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13123 struct die_info
*child_die
;
13124 sect_offset
*offsetp
;
13125 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13126 struct die_info
*origin_die
;
13127 /* Iterator of the ORIGIN_DIE children. */
13128 struct die_info
*origin_child_die
;
13129 struct attribute
*attr
;
13130 struct dwarf2_cu
*origin_cu
;
13131 struct pending
**origin_previous_list_in_scope
;
13133 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13137 /* Note that following die references may follow to a die in a
13141 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13143 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13145 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13146 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13148 if (die
->tag
!= origin_die
->tag
13149 && !(die
->tag
== DW_TAG_inlined_subroutine
13150 && origin_die
->tag
== DW_TAG_subprogram
))
13151 complaint (_("DIE %s and its abstract origin %s have different tags"),
13152 sect_offset_str (die
->sect_off
),
13153 sect_offset_str (origin_die
->sect_off
));
13155 std::vector
<sect_offset
> offsets
;
13157 for (child_die
= die
->child
;
13158 child_die
&& child_die
->tag
;
13159 child_die
= sibling_die (child_die
))
13161 struct die_info
*child_origin_die
;
13162 struct dwarf2_cu
*child_origin_cu
;
13164 /* We are trying to process concrete instance entries:
13165 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13166 it's not relevant to our analysis here. i.e. detecting DIEs that are
13167 present in the abstract instance but not referenced in the concrete
13169 if (child_die
->tag
== DW_TAG_call_site
13170 || child_die
->tag
== DW_TAG_GNU_call_site
)
13173 /* For each CHILD_DIE, find the corresponding child of
13174 ORIGIN_DIE. If there is more than one layer of
13175 DW_AT_abstract_origin, follow them all; there shouldn't be,
13176 but GCC versions at least through 4.4 generate this (GCC PR
13178 child_origin_die
= child_die
;
13179 child_origin_cu
= cu
;
13182 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13186 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13190 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13191 counterpart may exist. */
13192 if (child_origin_die
!= child_die
)
13194 if (child_die
->tag
!= child_origin_die
->tag
13195 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13196 && child_origin_die
->tag
== DW_TAG_subprogram
))
13197 complaint (_("Child DIE %s and its abstract origin %s have "
13199 sect_offset_str (child_die
->sect_off
),
13200 sect_offset_str (child_origin_die
->sect_off
));
13201 if (child_origin_die
->parent
!= origin_die
)
13202 complaint (_("Child DIE %s and its abstract origin %s have "
13203 "different parents"),
13204 sect_offset_str (child_die
->sect_off
),
13205 sect_offset_str (child_origin_die
->sect_off
));
13207 offsets
.push_back (child_origin_die
->sect_off
);
13210 std::sort (offsets
.begin (), offsets
.end ());
13211 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13212 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13213 if (offsetp
[-1] == *offsetp
)
13214 complaint (_("Multiple children of DIE %s refer "
13215 "to DIE %s as their abstract origin"),
13216 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13218 offsetp
= offsets
.data ();
13219 origin_child_die
= origin_die
->child
;
13220 while (origin_child_die
&& origin_child_die
->tag
)
13222 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13223 while (offsetp
< offsets_end
13224 && *offsetp
< origin_child_die
->sect_off
)
13226 if (offsetp
>= offsets_end
13227 || *offsetp
> origin_child_die
->sect_off
)
13229 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13230 Check whether we're already processing ORIGIN_CHILD_DIE.
13231 This can happen with mutually referenced abstract_origins.
13233 if (!origin_child_die
->in_process
)
13234 process_die (origin_child_die
, origin_cu
);
13236 origin_child_die
= sibling_die (origin_child_die
);
13238 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13240 if (cu
!= origin_cu
)
13241 compute_delayed_physnames (origin_cu
);
13245 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13247 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13248 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13249 struct context_stack
*newobj
;
13252 struct die_info
*child_die
;
13253 struct attribute
*attr
, *call_line
, *call_file
;
13255 CORE_ADDR baseaddr
;
13256 struct block
*block
;
13257 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13258 std::vector
<struct symbol
*> template_args
;
13259 struct template_symbol
*templ_func
= NULL
;
13263 /* If we do not have call site information, we can't show the
13264 caller of this inlined function. That's too confusing, so
13265 only use the scope for local variables. */
13266 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13267 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13268 if (call_line
== NULL
|| call_file
== NULL
)
13270 read_lexical_block_scope (die
, cu
);
13275 baseaddr
= objfile
->text_section_offset ();
13277 name
= dwarf2_name (die
, cu
);
13279 /* Ignore functions with missing or empty names. These are actually
13280 illegal according to the DWARF standard. */
13283 complaint (_("missing name for subprogram DIE at %s"),
13284 sect_offset_str (die
->sect_off
));
13288 /* Ignore functions with missing or invalid low and high pc attributes. */
13289 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13290 <= PC_BOUNDS_INVALID
)
13292 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13293 if (!attr
|| !DW_UNSND (attr
))
13294 complaint (_("cannot get low and high bounds "
13295 "for subprogram DIE at %s"),
13296 sect_offset_str (die
->sect_off
));
13300 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13301 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13303 /* If we have any template arguments, then we must allocate a
13304 different sort of symbol. */
13305 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13307 if (child_die
->tag
== DW_TAG_template_type_param
13308 || child_die
->tag
== DW_TAG_template_value_param
)
13310 templ_func
= allocate_template_symbol (objfile
);
13311 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13316 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13317 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13318 (struct symbol
*) templ_func
);
13320 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13321 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13324 /* If there is a location expression for DW_AT_frame_base, record
13326 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13327 if (attr
!= nullptr)
13328 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13330 /* If there is a location for the static link, record it. */
13331 newobj
->static_link
= NULL
;
13332 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13333 if (attr
!= nullptr)
13335 newobj
->static_link
13336 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13337 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13338 dwarf2_per_cu_addr_type (cu
->per_cu
));
13341 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13343 if (die
->child
!= NULL
)
13345 child_die
= die
->child
;
13346 while (child_die
&& child_die
->tag
)
13348 if (child_die
->tag
== DW_TAG_template_type_param
13349 || child_die
->tag
== DW_TAG_template_value_param
)
13351 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13354 template_args
.push_back (arg
);
13357 process_die (child_die
, cu
);
13358 child_die
= sibling_die (child_die
);
13362 inherit_abstract_dies (die
, cu
);
13364 /* If we have a DW_AT_specification, we might need to import using
13365 directives from the context of the specification DIE. See the
13366 comment in determine_prefix. */
13367 if (cu
->language
== language_cplus
13368 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13370 struct dwarf2_cu
*spec_cu
= cu
;
13371 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13375 child_die
= spec_die
->child
;
13376 while (child_die
&& child_die
->tag
)
13378 if (child_die
->tag
== DW_TAG_imported_module
)
13379 process_die (child_die
, spec_cu
);
13380 child_die
= sibling_die (child_die
);
13383 /* In some cases, GCC generates specification DIEs that
13384 themselves contain DW_AT_specification attributes. */
13385 spec_die
= die_specification (spec_die
, &spec_cu
);
13389 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13390 /* Make a block for the local symbols within. */
13391 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13392 cstk
.static_link
, lowpc
, highpc
);
13394 /* For C++, set the block's scope. */
13395 if ((cu
->language
== language_cplus
13396 || cu
->language
== language_fortran
13397 || cu
->language
== language_d
13398 || cu
->language
== language_rust
)
13399 && cu
->processing_has_namespace_info
)
13400 block_set_scope (block
, determine_prefix (die
, cu
),
13401 &objfile
->objfile_obstack
);
13403 /* If we have address ranges, record them. */
13404 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13406 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13408 /* Attach template arguments to function. */
13409 if (!template_args
.empty ())
13411 gdb_assert (templ_func
!= NULL
);
13413 templ_func
->n_template_arguments
= template_args
.size ();
13414 templ_func
->template_arguments
13415 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13416 templ_func
->n_template_arguments
);
13417 memcpy (templ_func
->template_arguments
,
13418 template_args
.data (),
13419 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13421 /* Make sure that the symtab is set on the new symbols. Even
13422 though they don't appear in this symtab directly, other parts
13423 of gdb assume that symbols do, and this is reasonably
13425 for (symbol
*sym
: template_args
)
13426 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13429 /* In C++, we can have functions nested inside functions (e.g., when
13430 a function declares a class that has methods). This means that
13431 when we finish processing a function scope, we may need to go
13432 back to building a containing block's symbol lists. */
13433 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13434 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13436 /* If we've finished processing a top-level function, subsequent
13437 symbols go in the file symbol list. */
13438 if (cu
->get_builder ()->outermost_context_p ())
13439 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13442 /* Process all the DIES contained within a lexical block scope. Start
13443 a new scope, process the dies, and then close the scope. */
13446 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13448 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13449 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13450 CORE_ADDR lowpc
, highpc
;
13451 struct die_info
*child_die
;
13452 CORE_ADDR baseaddr
;
13454 baseaddr
= objfile
->text_section_offset ();
13456 /* Ignore blocks with missing or invalid low and high pc attributes. */
13457 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13458 as multiple lexical blocks? Handling children in a sane way would
13459 be nasty. Might be easier to properly extend generic blocks to
13460 describe ranges. */
13461 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13463 case PC_BOUNDS_NOT_PRESENT
:
13464 /* DW_TAG_lexical_block has no attributes, process its children as if
13465 there was no wrapping by that DW_TAG_lexical_block.
13466 GCC does no longer produces such DWARF since GCC r224161. */
13467 for (child_die
= die
->child
;
13468 child_die
!= NULL
&& child_die
->tag
;
13469 child_die
= sibling_die (child_die
))
13470 process_die (child_die
, cu
);
13472 case PC_BOUNDS_INVALID
:
13475 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13476 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13478 cu
->get_builder ()->push_context (0, lowpc
);
13479 if (die
->child
!= NULL
)
13481 child_die
= die
->child
;
13482 while (child_die
&& child_die
->tag
)
13484 process_die (child_die
, cu
);
13485 child_die
= sibling_die (child_die
);
13488 inherit_abstract_dies (die
, cu
);
13489 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13491 if (*cu
->get_builder ()->get_local_symbols () != NULL
13492 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13494 struct block
*block
13495 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13496 cstk
.start_addr
, highpc
);
13498 /* Note that recording ranges after traversing children, as we
13499 do here, means that recording a parent's ranges entails
13500 walking across all its children's ranges as they appear in
13501 the address map, which is quadratic behavior.
13503 It would be nicer to record the parent's ranges before
13504 traversing its children, simply overriding whatever you find
13505 there. But since we don't even decide whether to create a
13506 block until after we've traversed its children, that's hard
13508 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13510 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13511 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13514 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13517 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13519 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13520 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13521 CORE_ADDR pc
, baseaddr
;
13522 struct attribute
*attr
;
13523 struct call_site
*call_site
, call_site_local
;
13526 struct die_info
*child_die
;
13528 baseaddr
= objfile
->text_section_offset ();
13530 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13533 /* This was a pre-DWARF-5 GNU extension alias
13534 for DW_AT_call_return_pc. */
13535 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13539 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13540 "DIE %s [in module %s]"),
13541 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13544 pc
= attr
->value_as_address () + baseaddr
;
13545 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13547 if (cu
->call_site_htab
== NULL
)
13548 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13549 NULL
, &objfile
->objfile_obstack
,
13550 hashtab_obstack_allocate
, NULL
);
13551 call_site_local
.pc
= pc
;
13552 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13555 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13556 "DIE %s [in module %s]"),
13557 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13558 objfile_name (objfile
));
13562 /* Count parameters at the caller. */
13565 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13566 child_die
= sibling_die (child_die
))
13568 if (child_die
->tag
!= DW_TAG_call_site_parameter
13569 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13571 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13572 "DW_TAG_call_site child DIE %s [in module %s]"),
13573 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13574 objfile_name (objfile
));
13582 = ((struct call_site
*)
13583 obstack_alloc (&objfile
->objfile_obstack
,
13584 sizeof (*call_site
)
13585 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13587 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13588 call_site
->pc
= pc
;
13590 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13591 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13593 struct die_info
*func_die
;
13595 /* Skip also over DW_TAG_inlined_subroutine. */
13596 for (func_die
= die
->parent
;
13597 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13598 && func_die
->tag
!= DW_TAG_subroutine_type
;
13599 func_die
= func_die
->parent
);
13601 /* DW_AT_call_all_calls is a superset
13602 of DW_AT_call_all_tail_calls. */
13604 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13605 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13606 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13607 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13609 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13610 not complete. But keep CALL_SITE for look ups via call_site_htab,
13611 both the initial caller containing the real return address PC and
13612 the final callee containing the current PC of a chain of tail
13613 calls do not need to have the tail call list complete. But any
13614 function candidate for a virtual tail call frame searched via
13615 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13616 determined unambiguously. */
13620 struct type
*func_type
= NULL
;
13623 func_type
= get_die_type (func_die
, cu
);
13624 if (func_type
!= NULL
)
13626 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13628 /* Enlist this call site to the function. */
13629 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13630 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13633 complaint (_("Cannot find function owning DW_TAG_call_site "
13634 "DIE %s [in module %s]"),
13635 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13639 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13641 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13643 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13646 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13647 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13649 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13650 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13651 /* Keep NULL DWARF_BLOCK. */;
13652 else if (attr
->form_is_block ())
13654 struct dwarf2_locexpr_baton
*dlbaton
;
13656 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13657 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13658 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13659 dlbaton
->per_cu
= cu
->per_cu
;
13661 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13663 else if (attr
->form_is_ref ())
13665 struct dwarf2_cu
*target_cu
= cu
;
13666 struct die_info
*target_die
;
13668 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13669 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13670 if (die_is_declaration (target_die
, target_cu
))
13672 const char *target_physname
;
13674 /* Prefer the mangled name; otherwise compute the demangled one. */
13675 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13676 if (target_physname
== NULL
)
13677 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13678 if (target_physname
== NULL
)
13679 complaint (_("DW_AT_call_target target DIE has invalid "
13680 "physname, for referencing DIE %s [in module %s]"),
13681 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13683 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13689 /* DW_AT_entry_pc should be preferred. */
13690 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13691 <= PC_BOUNDS_INVALID
)
13692 complaint (_("DW_AT_call_target target DIE has invalid "
13693 "low pc, for referencing DIE %s [in module %s]"),
13694 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13697 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13698 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13703 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13704 "block nor reference, for DIE %s [in module %s]"),
13705 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13707 call_site
->per_cu
= cu
->per_cu
;
13709 for (child_die
= die
->child
;
13710 child_die
&& child_die
->tag
;
13711 child_die
= sibling_die (child_die
))
13713 struct call_site_parameter
*parameter
;
13714 struct attribute
*loc
, *origin
;
13716 if (child_die
->tag
!= DW_TAG_call_site_parameter
13717 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13719 /* Already printed the complaint above. */
13723 gdb_assert (call_site
->parameter_count
< nparams
);
13724 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13726 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13727 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13728 register is contained in DW_AT_call_value. */
13730 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13731 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13732 if (origin
== NULL
)
13734 /* This was a pre-DWARF-5 GNU extension alias
13735 for DW_AT_call_parameter. */
13736 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13738 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13740 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13742 sect_offset sect_off
13743 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
13744 if (!offset_in_cu_p (&cu
->header
, sect_off
))
13746 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13747 binding can be done only inside one CU. Such referenced DIE
13748 therefore cannot be even moved to DW_TAG_partial_unit. */
13749 complaint (_("DW_AT_call_parameter offset is not in CU for "
13750 "DW_TAG_call_site child DIE %s [in module %s]"),
13751 sect_offset_str (child_die
->sect_off
),
13752 objfile_name (objfile
));
13755 parameter
->u
.param_cu_off
13756 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13758 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13760 complaint (_("No DW_FORM_block* DW_AT_location for "
13761 "DW_TAG_call_site child DIE %s [in module %s]"),
13762 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13767 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13768 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13769 if (parameter
->u
.dwarf_reg
!= -1)
13770 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13771 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13772 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13773 ¶meter
->u
.fb_offset
))
13774 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13777 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13778 "for DW_FORM_block* DW_AT_location is supported for "
13779 "DW_TAG_call_site child DIE %s "
13781 sect_offset_str (child_die
->sect_off
),
13782 objfile_name (objfile
));
13787 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13789 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13790 if (attr
== NULL
|| !attr
->form_is_block ())
13792 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13793 "DW_TAG_call_site child DIE %s [in module %s]"),
13794 sect_offset_str (child_die
->sect_off
),
13795 objfile_name (objfile
));
13798 parameter
->value
= DW_BLOCK (attr
)->data
;
13799 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13801 /* Parameters are not pre-cleared by memset above. */
13802 parameter
->data_value
= NULL
;
13803 parameter
->data_value_size
= 0;
13804 call_site
->parameter_count
++;
13806 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13808 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13809 if (attr
!= nullptr)
13811 if (!attr
->form_is_block ())
13812 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13813 "DW_TAG_call_site child DIE %s [in module %s]"),
13814 sect_offset_str (child_die
->sect_off
),
13815 objfile_name (objfile
));
13818 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13819 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13825 /* Helper function for read_variable. If DIE represents a virtual
13826 table, then return the type of the concrete object that is
13827 associated with the virtual table. Otherwise, return NULL. */
13829 static struct type
*
13830 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13832 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13836 /* Find the type DIE. */
13837 struct die_info
*type_die
= NULL
;
13838 struct dwarf2_cu
*type_cu
= cu
;
13840 if (attr
->form_is_ref ())
13841 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13842 if (type_die
== NULL
)
13845 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13847 return die_containing_type (type_die
, type_cu
);
13850 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13853 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13855 struct rust_vtable_symbol
*storage
= NULL
;
13857 if (cu
->language
== language_rust
)
13859 struct type
*containing_type
= rust_containing_type (die
, cu
);
13861 if (containing_type
!= NULL
)
13863 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13865 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
13866 initialize_objfile_symbol (storage
);
13867 storage
->concrete_type
= containing_type
;
13868 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13872 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13873 struct attribute
*abstract_origin
13874 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13875 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13876 if (res
== NULL
&& loc
&& abstract_origin
)
13878 /* We have a variable without a name, but with a location and an abstract
13879 origin. This may be a concrete instance of an abstract variable
13880 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13882 struct dwarf2_cu
*origin_cu
= cu
;
13883 struct die_info
*origin_die
13884 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13885 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13886 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13890 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13891 reading .debug_rnglists.
13892 Callback's type should be:
13893 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13894 Return true if the attributes are present and valid, otherwise,
13897 template <typename Callback
>
13899 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13900 Callback
&&callback
)
13902 struct dwarf2_per_objfile
*dwarf2_per_objfile
13903 = cu
->per_cu
->dwarf2_per_objfile
;
13904 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13905 bfd
*obfd
= objfile
->obfd
;
13906 /* Base address selection entry. */
13909 const gdb_byte
*buffer
;
13910 CORE_ADDR baseaddr
;
13911 bool overflow
= false;
13913 found_base
= cu
->base_known
;
13914 base
= cu
->base_address
;
13916 dwarf2_per_objfile
->rnglists
.read (objfile
);
13917 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13919 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13923 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13925 baseaddr
= objfile
->text_section_offset ();
13929 /* Initialize it due to a false compiler warning. */
13930 CORE_ADDR range_beginning
= 0, range_end
= 0;
13931 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13932 + dwarf2_per_objfile
->rnglists
.size
);
13933 unsigned int bytes_read
;
13935 if (buffer
== buf_end
)
13940 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13943 case DW_RLE_end_of_list
:
13945 case DW_RLE_base_address
:
13946 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13951 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13953 buffer
+= bytes_read
;
13955 case DW_RLE_start_length
:
13956 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13961 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13962 buffer
+= bytes_read
;
13963 range_end
= (range_beginning
13964 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13965 buffer
+= bytes_read
;
13966 if (buffer
> buf_end
)
13972 case DW_RLE_offset_pair
:
13973 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13974 buffer
+= bytes_read
;
13975 if (buffer
> buf_end
)
13980 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13981 buffer
+= bytes_read
;
13982 if (buffer
> buf_end
)
13988 case DW_RLE_start_end
:
13989 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13994 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13995 buffer
+= bytes_read
;
13996 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
13997 buffer
+= bytes_read
;
14000 complaint (_("Invalid .debug_rnglists data (no base address)"));
14003 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14005 if (rlet
== DW_RLE_base_address
)
14010 /* We have no valid base address for the ranges
14012 complaint (_("Invalid .debug_rnglists data (no base address)"));
14016 if (range_beginning
> range_end
)
14018 /* Inverted range entries are invalid. */
14019 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14023 /* Empty range entries have no effect. */
14024 if (range_beginning
== range_end
)
14027 range_beginning
+= base
;
14030 /* A not-uncommon case of bad debug info.
14031 Don't pollute the addrmap with bad data. */
14032 if (range_beginning
+ baseaddr
== 0
14033 && !dwarf2_per_objfile
->has_section_at_zero
)
14035 complaint (_(".debug_rnglists entry has start address of zero"
14036 " [in module %s]"), objfile_name (objfile
));
14040 callback (range_beginning
, range_end
);
14045 complaint (_("Offset %d is not terminated "
14046 "for DW_AT_ranges attribute"),
14054 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14055 Callback's type should be:
14056 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14057 Return 1 if the attributes are present and valid, otherwise, return 0. */
14059 template <typename Callback
>
14061 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14062 Callback
&&callback
)
14064 struct dwarf2_per_objfile
*dwarf2_per_objfile
14065 = cu
->per_cu
->dwarf2_per_objfile
;
14066 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14067 struct comp_unit_head
*cu_header
= &cu
->header
;
14068 bfd
*obfd
= objfile
->obfd
;
14069 unsigned int addr_size
= cu_header
->addr_size
;
14070 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14071 /* Base address selection entry. */
14074 unsigned int dummy
;
14075 const gdb_byte
*buffer
;
14076 CORE_ADDR baseaddr
;
14078 if (cu_header
->version
>= 5)
14079 return dwarf2_rnglists_process (offset
, cu
, callback
);
14081 found_base
= cu
->base_known
;
14082 base
= cu
->base_address
;
14084 dwarf2_per_objfile
->ranges
.read (objfile
);
14085 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14087 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14091 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14093 baseaddr
= objfile
->text_section_offset ();
14097 CORE_ADDR range_beginning
, range_end
;
14099 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14100 buffer
+= addr_size
;
14101 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14102 buffer
+= addr_size
;
14103 offset
+= 2 * addr_size
;
14105 /* An end of list marker is a pair of zero addresses. */
14106 if (range_beginning
== 0 && range_end
== 0)
14107 /* Found the end of list entry. */
14110 /* Each base address selection entry is a pair of 2 values.
14111 The first is the largest possible address, the second is
14112 the base address. Check for a base address here. */
14113 if ((range_beginning
& mask
) == mask
)
14115 /* If we found the largest possible address, then we already
14116 have the base address in range_end. */
14124 /* We have no valid base address for the ranges
14126 complaint (_("Invalid .debug_ranges data (no base address)"));
14130 if (range_beginning
> range_end
)
14132 /* Inverted range entries are invalid. */
14133 complaint (_("Invalid .debug_ranges data (inverted range)"));
14137 /* Empty range entries have no effect. */
14138 if (range_beginning
== range_end
)
14141 range_beginning
+= base
;
14144 /* A not-uncommon case of bad debug info.
14145 Don't pollute the addrmap with bad data. */
14146 if (range_beginning
+ baseaddr
== 0
14147 && !dwarf2_per_objfile
->has_section_at_zero
)
14149 complaint (_(".debug_ranges entry has start address of zero"
14150 " [in module %s]"), objfile_name (objfile
));
14154 callback (range_beginning
, range_end
);
14160 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14161 Return 1 if the attributes are present and valid, otherwise, return 0.
14162 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14165 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14166 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14167 dwarf2_psymtab
*ranges_pst
)
14169 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14170 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14171 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
14174 CORE_ADDR high
= 0;
14177 retval
= dwarf2_ranges_process (offset
, cu
,
14178 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14180 if (ranges_pst
!= NULL
)
14185 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14186 range_beginning
+ baseaddr
)
14188 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14189 range_end
+ baseaddr
)
14191 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14192 lowpc
, highpc
- 1, ranges_pst
);
14195 /* FIXME: This is recording everything as a low-high
14196 segment of consecutive addresses. We should have a
14197 data structure for discontiguous block ranges
14201 low
= range_beginning
;
14207 if (range_beginning
< low
)
14208 low
= range_beginning
;
14209 if (range_end
> high
)
14217 /* If the first entry is an end-of-list marker, the range
14218 describes an empty scope, i.e. no instructions. */
14224 *high_return
= high
;
14228 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14229 definition for the return value. *LOWPC and *HIGHPC are set iff
14230 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14232 static enum pc_bounds_kind
14233 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14234 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14235 dwarf2_psymtab
*pst
)
14237 struct dwarf2_per_objfile
*dwarf2_per_objfile
14238 = cu
->per_cu
->dwarf2_per_objfile
;
14239 struct attribute
*attr
;
14240 struct attribute
*attr_high
;
14242 CORE_ADDR high
= 0;
14243 enum pc_bounds_kind ret
;
14245 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14248 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14249 if (attr
!= nullptr)
14251 low
= attr
->value_as_address ();
14252 high
= attr_high
->value_as_address ();
14253 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14257 /* Found high w/o low attribute. */
14258 return PC_BOUNDS_INVALID
;
14260 /* Found consecutive range of addresses. */
14261 ret
= PC_BOUNDS_HIGH_LOW
;
14265 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14268 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14269 We take advantage of the fact that DW_AT_ranges does not appear
14270 in DW_TAG_compile_unit of DWO files. */
14271 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14272 unsigned int ranges_offset
= (DW_UNSND (attr
)
14273 + (need_ranges_base
14277 /* Value of the DW_AT_ranges attribute is the offset in the
14278 .debug_ranges section. */
14279 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14280 return PC_BOUNDS_INVALID
;
14281 /* Found discontinuous range of addresses. */
14282 ret
= PC_BOUNDS_RANGES
;
14285 return PC_BOUNDS_NOT_PRESENT
;
14288 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14290 return PC_BOUNDS_INVALID
;
14292 /* When using the GNU linker, .gnu.linkonce. sections are used to
14293 eliminate duplicate copies of functions and vtables and such.
14294 The linker will arbitrarily choose one and discard the others.
14295 The AT_*_pc values for such functions refer to local labels in
14296 these sections. If the section from that file was discarded, the
14297 labels are not in the output, so the relocs get a value of 0.
14298 If this is a discarded function, mark the pc bounds as invalid,
14299 so that GDB will ignore it. */
14300 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14301 return PC_BOUNDS_INVALID
;
14309 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14310 its low and high PC addresses. Do nothing if these addresses could not
14311 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14312 and HIGHPC to the high address if greater than HIGHPC. */
14315 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14316 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14317 struct dwarf2_cu
*cu
)
14319 CORE_ADDR low
, high
;
14320 struct die_info
*child
= die
->child
;
14322 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14324 *lowpc
= std::min (*lowpc
, low
);
14325 *highpc
= std::max (*highpc
, high
);
14328 /* If the language does not allow nested subprograms (either inside
14329 subprograms or lexical blocks), we're done. */
14330 if (cu
->language
!= language_ada
)
14333 /* Check all the children of the given DIE. If it contains nested
14334 subprograms, then check their pc bounds. Likewise, we need to
14335 check lexical blocks as well, as they may also contain subprogram
14337 while (child
&& child
->tag
)
14339 if (child
->tag
== DW_TAG_subprogram
14340 || child
->tag
== DW_TAG_lexical_block
)
14341 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14342 child
= sibling_die (child
);
14346 /* Get the low and high pc's represented by the scope DIE, and store
14347 them in *LOWPC and *HIGHPC. If the correct values can't be
14348 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14351 get_scope_pc_bounds (struct die_info
*die
,
14352 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14353 struct dwarf2_cu
*cu
)
14355 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14356 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14357 CORE_ADDR current_low
, current_high
;
14359 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14360 >= PC_BOUNDS_RANGES
)
14362 best_low
= current_low
;
14363 best_high
= current_high
;
14367 struct die_info
*child
= die
->child
;
14369 while (child
&& child
->tag
)
14371 switch (child
->tag
) {
14372 case DW_TAG_subprogram
:
14373 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14375 case DW_TAG_namespace
:
14376 case DW_TAG_module
:
14377 /* FIXME: carlton/2004-01-16: Should we do this for
14378 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14379 that current GCC's always emit the DIEs corresponding
14380 to definitions of methods of classes as children of a
14381 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14382 the DIEs giving the declarations, which could be
14383 anywhere). But I don't see any reason why the
14384 standards says that they have to be there. */
14385 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14387 if (current_low
!= ((CORE_ADDR
) -1))
14389 best_low
= std::min (best_low
, current_low
);
14390 best_high
= std::max (best_high
, current_high
);
14398 child
= sibling_die (child
);
14403 *highpc
= best_high
;
14406 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14410 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14411 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14413 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14414 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14415 struct attribute
*attr
;
14416 struct attribute
*attr_high
;
14418 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14421 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14422 if (attr
!= nullptr)
14424 CORE_ADDR low
= attr
->value_as_address ();
14425 CORE_ADDR high
= attr_high
->value_as_address ();
14427 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14430 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14431 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14432 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14436 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14437 if (attr
!= nullptr)
14439 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14440 We take advantage of the fact that DW_AT_ranges does not appear
14441 in DW_TAG_compile_unit of DWO files. */
14442 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14444 /* The value of the DW_AT_ranges attribute is the offset of the
14445 address range list in the .debug_ranges section. */
14446 unsigned long offset
= (DW_UNSND (attr
)
14447 + (need_ranges_base
? cu
->ranges_base
: 0));
14449 std::vector
<blockrange
> blockvec
;
14450 dwarf2_ranges_process (offset
, cu
,
14451 [&] (CORE_ADDR start
, CORE_ADDR end
)
14455 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14456 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14457 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14458 blockvec
.emplace_back (start
, end
);
14461 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14465 /* Check whether the producer field indicates either of GCC < 4.6, or the
14466 Intel C/C++ compiler, and cache the result in CU. */
14469 check_producer (struct dwarf2_cu
*cu
)
14473 if (cu
->producer
== NULL
)
14475 /* For unknown compilers expect their behavior is DWARF version
14478 GCC started to support .debug_types sections by -gdwarf-4 since
14479 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14480 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14481 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14482 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14484 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14486 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14487 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14489 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14491 cu
->producer_is_icc
= true;
14492 cu
->producer_is_icc_lt_14
= major
< 14;
14494 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14495 cu
->producer_is_codewarrior
= true;
14498 /* For other non-GCC compilers, expect their behavior is DWARF version
14502 cu
->checked_producer
= true;
14505 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14506 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14507 during 4.6.0 experimental. */
14510 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14512 if (!cu
->checked_producer
)
14513 check_producer (cu
);
14515 return cu
->producer_is_gxx_lt_4_6
;
14519 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14520 with incorrect is_stmt attributes. */
14523 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14525 if (!cu
->checked_producer
)
14526 check_producer (cu
);
14528 return cu
->producer_is_codewarrior
;
14531 /* Return the default accessibility type if it is not overridden by
14532 DW_AT_accessibility. */
14534 static enum dwarf_access_attribute
14535 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14537 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14539 /* The default DWARF 2 accessibility for members is public, the default
14540 accessibility for inheritance is private. */
14542 if (die
->tag
!= DW_TAG_inheritance
)
14543 return DW_ACCESS_public
;
14545 return DW_ACCESS_private
;
14549 /* DWARF 3+ defines the default accessibility a different way. The same
14550 rules apply now for DW_TAG_inheritance as for the members and it only
14551 depends on the container kind. */
14553 if (die
->parent
->tag
== DW_TAG_class_type
)
14554 return DW_ACCESS_private
;
14556 return DW_ACCESS_public
;
14560 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14561 offset. If the attribute was not found return 0, otherwise return
14562 1. If it was found but could not properly be handled, set *OFFSET
14566 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14569 struct attribute
*attr
;
14571 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14576 /* Note that we do not check for a section offset first here.
14577 This is because DW_AT_data_member_location is new in DWARF 4,
14578 so if we see it, we can assume that a constant form is really
14579 a constant and not a section offset. */
14580 if (attr
->form_is_constant ())
14581 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14582 else if (attr
->form_is_section_offset ())
14583 dwarf2_complex_location_expr_complaint ();
14584 else if (attr
->form_is_block ())
14585 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14587 dwarf2_complex_location_expr_complaint ();
14595 /* Add an aggregate field to the field list. */
14598 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14599 struct dwarf2_cu
*cu
)
14601 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14602 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14603 struct nextfield
*new_field
;
14604 struct attribute
*attr
;
14606 const char *fieldname
= "";
14608 if (die
->tag
== DW_TAG_inheritance
)
14610 fip
->baseclasses
.emplace_back ();
14611 new_field
= &fip
->baseclasses
.back ();
14615 fip
->fields
.emplace_back ();
14616 new_field
= &fip
->fields
.back ();
14621 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14622 if (attr
!= nullptr)
14623 new_field
->accessibility
= DW_UNSND (attr
);
14625 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14626 if (new_field
->accessibility
!= DW_ACCESS_public
)
14627 fip
->non_public_fields
= 1;
14629 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14630 if (attr
!= nullptr)
14631 new_field
->virtuality
= DW_UNSND (attr
);
14633 new_field
->virtuality
= DW_VIRTUALITY_none
;
14635 fp
= &new_field
->field
;
14637 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14641 /* Data member other than a C++ static data member. */
14643 /* Get type of field. */
14644 fp
->type
= die_type (die
, cu
);
14646 SET_FIELD_BITPOS (*fp
, 0);
14648 /* Get bit size of field (zero if none). */
14649 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14650 if (attr
!= nullptr)
14652 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14656 FIELD_BITSIZE (*fp
) = 0;
14659 /* Get bit offset of field. */
14660 if (handle_data_member_location (die
, cu
, &offset
))
14661 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14662 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14663 if (attr
!= nullptr)
14665 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14667 /* For big endian bits, the DW_AT_bit_offset gives the
14668 additional bit offset from the MSB of the containing
14669 anonymous object to the MSB of the field. We don't
14670 have to do anything special since we don't need to
14671 know the size of the anonymous object. */
14672 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14676 /* For little endian bits, compute the bit offset to the
14677 MSB of the anonymous object, subtract off the number of
14678 bits from the MSB of the field to the MSB of the
14679 object, and then subtract off the number of bits of
14680 the field itself. The result is the bit offset of
14681 the LSB of the field. */
14682 int anonymous_size
;
14683 int bit_offset
= DW_UNSND (attr
);
14685 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14686 if (attr
!= nullptr)
14688 /* The size of the anonymous object containing
14689 the bit field is explicit, so use the
14690 indicated size (in bytes). */
14691 anonymous_size
= DW_UNSND (attr
);
14695 /* The size of the anonymous object containing
14696 the bit field must be inferred from the type
14697 attribute of the data member containing the
14699 anonymous_size
= TYPE_LENGTH (fp
->type
);
14701 SET_FIELD_BITPOS (*fp
,
14702 (FIELD_BITPOS (*fp
)
14703 + anonymous_size
* bits_per_byte
14704 - bit_offset
- FIELD_BITSIZE (*fp
)));
14707 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14709 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14710 + dwarf2_get_attr_constant_value (attr
, 0)));
14712 /* Get name of field. */
14713 fieldname
= dwarf2_name (die
, cu
);
14714 if (fieldname
== NULL
)
14717 /* The name is already allocated along with this objfile, so we don't
14718 need to duplicate it for the type. */
14719 fp
->name
= fieldname
;
14721 /* Change accessibility for artificial fields (e.g. virtual table
14722 pointer or virtual base class pointer) to private. */
14723 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14725 FIELD_ARTIFICIAL (*fp
) = 1;
14726 new_field
->accessibility
= DW_ACCESS_private
;
14727 fip
->non_public_fields
= 1;
14730 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14732 /* C++ static member. */
14734 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14735 is a declaration, but all versions of G++ as of this writing
14736 (so through at least 3.2.1) incorrectly generate
14737 DW_TAG_variable tags. */
14739 const char *physname
;
14741 /* Get name of field. */
14742 fieldname
= dwarf2_name (die
, cu
);
14743 if (fieldname
== NULL
)
14746 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14748 /* Only create a symbol if this is an external value.
14749 new_symbol checks this and puts the value in the global symbol
14750 table, which we want. If it is not external, new_symbol
14751 will try to put the value in cu->list_in_scope which is wrong. */
14752 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14754 /* A static const member, not much different than an enum as far as
14755 we're concerned, except that we can support more types. */
14756 new_symbol (die
, NULL
, cu
);
14759 /* Get physical name. */
14760 physname
= dwarf2_physname (fieldname
, die
, cu
);
14762 /* The name is already allocated along with this objfile, so we don't
14763 need to duplicate it for the type. */
14764 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14765 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14766 FIELD_NAME (*fp
) = fieldname
;
14768 else if (die
->tag
== DW_TAG_inheritance
)
14772 /* C++ base class field. */
14773 if (handle_data_member_location (die
, cu
, &offset
))
14774 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14775 FIELD_BITSIZE (*fp
) = 0;
14776 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14777 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14779 else if (die
->tag
== DW_TAG_variant_part
)
14781 /* process_structure_scope will treat this DIE as a union. */
14782 process_structure_scope (die
, cu
);
14784 /* The variant part is relative to the start of the enclosing
14786 SET_FIELD_BITPOS (*fp
, 0);
14787 fp
->type
= get_die_type (die
, cu
);
14788 fp
->artificial
= 1;
14789 fp
->name
= "<<variant>>";
14791 /* Normally a DW_TAG_variant_part won't have a size, but our
14792 representation requires one, so set it to the maximum of the
14793 child sizes, being sure to account for the offset at which
14794 each child is seen. */
14795 if (TYPE_LENGTH (fp
->type
) == 0)
14798 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
14800 unsigned len
= ((TYPE_FIELD_BITPOS (fp
->type
, i
) + 7) / 8
14801 + TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)));
14805 TYPE_LENGTH (fp
->type
) = max
;
14809 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14812 /* Can the type given by DIE define another type? */
14815 type_can_define_types (const struct die_info
*die
)
14819 case DW_TAG_typedef
:
14820 case DW_TAG_class_type
:
14821 case DW_TAG_structure_type
:
14822 case DW_TAG_union_type
:
14823 case DW_TAG_enumeration_type
:
14831 /* Add a type definition defined in the scope of the FIP's class. */
14834 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14835 struct dwarf2_cu
*cu
)
14837 struct decl_field fp
;
14838 memset (&fp
, 0, sizeof (fp
));
14840 gdb_assert (type_can_define_types (die
));
14842 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14843 fp
.name
= dwarf2_name (die
, cu
);
14844 fp
.type
= read_type_die (die
, cu
);
14846 /* Save accessibility. */
14847 enum dwarf_access_attribute accessibility
;
14848 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14850 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14852 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14853 switch (accessibility
)
14855 case DW_ACCESS_public
:
14856 /* The assumed value if neither private nor protected. */
14858 case DW_ACCESS_private
:
14861 case DW_ACCESS_protected
:
14862 fp
.is_protected
= 1;
14865 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14868 if (die
->tag
== DW_TAG_typedef
)
14869 fip
->typedef_field_list
.push_back (fp
);
14871 fip
->nested_types_list
.push_back (fp
);
14874 /* Create the vector of fields, and attach it to the type. */
14877 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14878 struct dwarf2_cu
*cu
)
14880 int nfields
= fip
->nfields
;
14882 /* Record the field count, allocate space for the array of fields,
14883 and create blank accessibility bitfields if necessary. */
14884 TYPE_NFIELDS (type
) = nfields
;
14885 TYPE_FIELDS (type
) = (struct field
*)
14886 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14888 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14890 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14892 TYPE_FIELD_PRIVATE_BITS (type
) =
14893 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14894 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14896 TYPE_FIELD_PROTECTED_BITS (type
) =
14897 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14898 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14900 TYPE_FIELD_IGNORE_BITS (type
) =
14901 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14902 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14905 /* If the type has baseclasses, allocate and clear a bit vector for
14906 TYPE_FIELD_VIRTUAL_BITS. */
14907 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14909 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14910 unsigned char *pointer
;
14912 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14913 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14914 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14915 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14916 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14919 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
14921 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
14923 for (int index
= 0; index
< nfields
; ++index
)
14925 struct nextfield
&field
= fip
->fields
[index
];
14927 if (field
.variant
.is_discriminant
)
14928 di
->discriminant_index
= index
;
14929 else if (field
.variant
.default_branch
)
14930 di
->default_index
= index
;
14932 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
14936 /* Copy the saved-up fields into the field vector. */
14937 for (int i
= 0; i
< nfields
; ++i
)
14939 struct nextfield
&field
14940 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14941 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14943 TYPE_FIELD (type
, i
) = field
.field
;
14944 switch (field
.accessibility
)
14946 case DW_ACCESS_private
:
14947 if (cu
->language
!= language_ada
)
14948 SET_TYPE_FIELD_PRIVATE (type
, i
);
14951 case DW_ACCESS_protected
:
14952 if (cu
->language
!= language_ada
)
14953 SET_TYPE_FIELD_PROTECTED (type
, i
);
14956 case DW_ACCESS_public
:
14960 /* Unknown accessibility. Complain and treat it as public. */
14962 complaint (_("unsupported accessibility %d"),
14963 field
.accessibility
);
14967 if (i
< fip
->baseclasses
.size ())
14969 switch (field
.virtuality
)
14971 case DW_VIRTUALITY_virtual
:
14972 case DW_VIRTUALITY_pure_virtual
:
14973 if (cu
->language
== language_ada
)
14974 error (_("unexpected virtuality in component of Ada type"));
14975 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14982 /* Return true if this member function is a constructor, false
14986 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14988 const char *fieldname
;
14989 const char *type_name
;
14992 if (die
->parent
== NULL
)
14995 if (die
->parent
->tag
!= DW_TAG_structure_type
14996 && die
->parent
->tag
!= DW_TAG_union_type
14997 && die
->parent
->tag
!= DW_TAG_class_type
)
15000 fieldname
= dwarf2_name (die
, cu
);
15001 type_name
= dwarf2_name (die
->parent
, cu
);
15002 if (fieldname
== NULL
|| type_name
== NULL
)
15005 len
= strlen (fieldname
);
15006 return (strncmp (fieldname
, type_name
, len
) == 0
15007 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15010 /* Check if the given VALUE is a recognized enum
15011 dwarf_defaulted_attribute constant according to DWARF5 spec,
15015 is_valid_DW_AT_defaulted (ULONGEST value
)
15019 case DW_DEFAULTED_no
:
15020 case DW_DEFAULTED_in_class
:
15021 case DW_DEFAULTED_out_of_class
:
15025 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
15029 /* Add a member function to the proper fieldlist. */
15032 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15033 struct type
*type
, struct dwarf2_cu
*cu
)
15035 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15036 struct attribute
*attr
;
15038 struct fnfieldlist
*flp
= nullptr;
15039 struct fn_field
*fnp
;
15040 const char *fieldname
;
15041 struct type
*this_type
;
15042 enum dwarf_access_attribute accessibility
;
15044 if (cu
->language
== language_ada
)
15045 error (_("unexpected member function in Ada type"));
15047 /* Get name of member function. */
15048 fieldname
= dwarf2_name (die
, cu
);
15049 if (fieldname
== NULL
)
15052 /* Look up member function name in fieldlist. */
15053 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15055 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15057 flp
= &fip
->fnfieldlists
[i
];
15062 /* Create a new fnfieldlist if necessary. */
15063 if (flp
== nullptr)
15065 fip
->fnfieldlists
.emplace_back ();
15066 flp
= &fip
->fnfieldlists
.back ();
15067 flp
->name
= fieldname
;
15068 i
= fip
->fnfieldlists
.size () - 1;
15071 /* Create a new member function field and add it to the vector of
15073 flp
->fnfields
.emplace_back ();
15074 fnp
= &flp
->fnfields
.back ();
15076 /* Delay processing of the physname until later. */
15077 if (cu
->language
== language_cplus
)
15078 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15082 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15083 fnp
->physname
= physname
? physname
: "";
15086 fnp
->type
= alloc_type (objfile
);
15087 this_type
= read_type_die (die
, cu
);
15088 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15090 int nparams
= TYPE_NFIELDS (this_type
);
15092 /* TYPE is the domain of this method, and THIS_TYPE is the type
15093 of the method itself (TYPE_CODE_METHOD). */
15094 smash_to_method_type (fnp
->type
, type
,
15095 TYPE_TARGET_TYPE (this_type
),
15096 TYPE_FIELDS (this_type
),
15097 TYPE_NFIELDS (this_type
),
15098 TYPE_VARARGS (this_type
));
15100 /* Handle static member functions.
15101 Dwarf2 has no clean way to discern C++ static and non-static
15102 member functions. G++ helps GDB by marking the first
15103 parameter for non-static member functions (which is the this
15104 pointer) as artificial. We obtain this information from
15105 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15106 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15107 fnp
->voffset
= VOFFSET_STATIC
;
15110 complaint (_("member function type missing for '%s'"),
15111 dwarf2_full_name (fieldname
, die
, cu
));
15113 /* Get fcontext from DW_AT_containing_type if present. */
15114 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15115 fnp
->fcontext
= die_containing_type (die
, cu
);
15117 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15118 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15120 /* Get accessibility. */
15121 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15122 if (attr
!= nullptr)
15123 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15125 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15126 switch (accessibility
)
15128 case DW_ACCESS_private
:
15129 fnp
->is_private
= 1;
15131 case DW_ACCESS_protected
:
15132 fnp
->is_protected
= 1;
15136 /* Check for artificial methods. */
15137 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15138 if (attr
&& DW_UNSND (attr
) != 0)
15139 fnp
->is_artificial
= 1;
15141 /* Check for defaulted methods. */
15142 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15143 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15144 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15146 /* Check for deleted methods. */
15147 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15148 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15149 fnp
->is_deleted
= 1;
15151 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15153 /* Get index in virtual function table if it is a virtual member
15154 function. For older versions of GCC, this is an offset in the
15155 appropriate virtual table, as specified by DW_AT_containing_type.
15156 For everyone else, it is an expression to be evaluated relative
15157 to the object address. */
15159 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15160 if (attr
!= nullptr)
15162 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15164 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15166 /* Old-style GCC. */
15167 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15169 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15170 || (DW_BLOCK (attr
)->size
> 1
15171 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15172 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15174 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15175 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15176 dwarf2_complex_location_expr_complaint ();
15178 fnp
->voffset
/= cu
->header
.addr_size
;
15182 dwarf2_complex_location_expr_complaint ();
15184 if (!fnp
->fcontext
)
15186 /* If there is no `this' field and no DW_AT_containing_type,
15187 we cannot actually find a base class context for the
15189 if (TYPE_NFIELDS (this_type
) == 0
15190 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15192 complaint (_("cannot determine context for virtual member "
15193 "function \"%s\" (offset %s)"),
15194 fieldname
, sect_offset_str (die
->sect_off
));
15199 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15203 else if (attr
->form_is_section_offset ())
15205 dwarf2_complex_location_expr_complaint ();
15209 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15215 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15216 if (attr
&& DW_UNSND (attr
))
15218 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15219 complaint (_("Member function \"%s\" (offset %s) is virtual "
15220 "but the vtable offset is not specified"),
15221 fieldname
, sect_offset_str (die
->sect_off
));
15222 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15223 TYPE_CPLUS_DYNAMIC (type
) = 1;
15228 /* Create the vector of member function fields, and attach it to the type. */
15231 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15232 struct dwarf2_cu
*cu
)
15234 if (cu
->language
== language_ada
)
15235 error (_("unexpected member functions in Ada type"));
15237 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15238 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15240 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15242 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15244 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15245 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15247 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15248 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15249 fn_flp
->fn_fields
= (struct fn_field
*)
15250 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15252 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15253 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15256 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15259 /* Returns non-zero if NAME is the name of a vtable member in CU's
15260 language, zero otherwise. */
15262 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15264 static const char vptr
[] = "_vptr";
15266 /* Look for the C++ form of the vtable. */
15267 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15273 /* GCC outputs unnamed structures that are really pointers to member
15274 functions, with the ABI-specified layout. If TYPE describes
15275 such a structure, smash it into a member function type.
15277 GCC shouldn't do this; it should just output pointer to member DIEs.
15278 This is GCC PR debug/28767. */
15281 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15283 struct type
*pfn_type
, *self_type
, *new_type
;
15285 /* Check for a structure with no name and two children. */
15286 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15289 /* Check for __pfn and __delta members. */
15290 if (TYPE_FIELD_NAME (type
, 0) == NULL
15291 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15292 || TYPE_FIELD_NAME (type
, 1) == NULL
15293 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15296 /* Find the type of the method. */
15297 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15298 if (pfn_type
== NULL
15299 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15300 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15303 /* Look for the "this" argument. */
15304 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15305 if (TYPE_NFIELDS (pfn_type
) == 0
15306 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15307 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15310 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15311 new_type
= alloc_type (objfile
);
15312 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15313 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15314 TYPE_VARARGS (pfn_type
));
15315 smash_to_methodptr_type (type
, new_type
);
15318 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15319 appropriate error checking and issuing complaints if there is a
15323 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15325 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15327 if (attr
== nullptr)
15330 if (!attr
->form_is_constant ())
15332 complaint (_("DW_AT_alignment must have constant form"
15333 " - DIE at %s [in module %s]"),
15334 sect_offset_str (die
->sect_off
),
15335 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15340 if (attr
->form
== DW_FORM_sdata
)
15342 LONGEST val
= DW_SND (attr
);
15345 complaint (_("DW_AT_alignment value must not be negative"
15346 " - DIE at %s [in module %s]"),
15347 sect_offset_str (die
->sect_off
),
15348 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15354 align
= DW_UNSND (attr
);
15358 complaint (_("DW_AT_alignment value must not be zero"
15359 " - DIE at %s [in module %s]"),
15360 sect_offset_str (die
->sect_off
),
15361 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15364 if ((align
& (align
- 1)) != 0)
15366 complaint (_("DW_AT_alignment value must be a power of 2"
15367 " - DIE at %s [in module %s]"),
15368 sect_offset_str (die
->sect_off
),
15369 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15376 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15377 the alignment for TYPE. */
15380 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15383 if (!set_type_align (type
, get_alignment (cu
, die
)))
15384 complaint (_("DW_AT_alignment value too large"
15385 " - DIE at %s [in module %s]"),
15386 sect_offset_str (die
->sect_off
),
15387 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15390 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15391 constant for a type, according to DWARF5 spec, Table 5.5. */
15394 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15399 case DW_CC_pass_by_reference
:
15400 case DW_CC_pass_by_value
:
15404 complaint (_("unrecognized DW_AT_calling_convention value "
15405 "(%s) for a type"), pulongest (value
));
15410 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15411 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15412 also according to GNU-specific values (see include/dwarf2.h). */
15415 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15420 case DW_CC_program
:
15424 case DW_CC_GNU_renesas_sh
:
15425 case DW_CC_GNU_borland_fastcall_i386
:
15426 case DW_CC_GDB_IBM_OpenCL
:
15430 complaint (_("unrecognized DW_AT_calling_convention value "
15431 "(%s) for a subroutine"), pulongest (value
));
15436 /* Called when we find the DIE that starts a structure or union scope
15437 (definition) to create a type for the structure or union. Fill in
15438 the type's name and general properties; the members will not be
15439 processed until process_structure_scope. A symbol table entry for
15440 the type will also not be done until process_structure_scope (assuming
15441 the type has a name).
15443 NOTE: we need to call these functions regardless of whether or not the
15444 DIE has a DW_AT_name attribute, since it might be an anonymous
15445 structure or union. This gets the type entered into our set of
15446 user defined types. */
15448 static struct type
*
15449 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15451 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15453 struct attribute
*attr
;
15456 /* If the definition of this type lives in .debug_types, read that type.
15457 Don't follow DW_AT_specification though, that will take us back up
15458 the chain and we want to go down. */
15459 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15460 if (attr
!= nullptr)
15462 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15464 /* The type's CU may not be the same as CU.
15465 Ensure TYPE is recorded with CU in die_type_hash. */
15466 return set_die_type (die
, type
, cu
);
15469 type
= alloc_type (objfile
);
15470 INIT_CPLUS_SPECIFIC (type
);
15472 name
= dwarf2_name (die
, cu
);
15475 if (cu
->language
== language_cplus
15476 || cu
->language
== language_d
15477 || cu
->language
== language_rust
)
15479 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15481 /* dwarf2_full_name might have already finished building the DIE's
15482 type. If so, there is no need to continue. */
15483 if (get_die_type (die
, cu
) != NULL
)
15484 return get_die_type (die
, cu
);
15486 TYPE_NAME (type
) = full_name
;
15490 /* The name is already allocated along with this objfile, so
15491 we don't need to duplicate it for the type. */
15492 TYPE_NAME (type
) = name
;
15496 if (die
->tag
== DW_TAG_structure_type
)
15498 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15500 else if (die
->tag
== DW_TAG_union_type
)
15502 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15504 else if (die
->tag
== DW_TAG_variant_part
)
15506 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15507 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15511 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15514 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15515 TYPE_DECLARED_CLASS (type
) = 1;
15517 /* Store the calling convention in the type if it's available in
15518 the die. Otherwise the calling convention remains set to
15519 the default value DW_CC_normal. */
15520 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15521 if (attr
!= nullptr
15522 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15524 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15525 TYPE_CPLUS_CALLING_CONVENTION (type
)
15526 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15529 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15530 if (attr
!= nullptr)
15532 if (attr
->form_is_constant ())
15533 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15536 /* For the moment, dynamic type sizes are not supported
15537 by GDB's struct type. The actual size is determined
15538 on-demand when resolving the type of a given object,
15539 so set the type's length to zero for now. Otherwise,
15540 we record an expression as the length, and that expression
15541 could lead to a very large value, which could eventually
15542 lead to us trying to allocate that much memory when creating
15543 a value of that type. */
15544 TYPE_LENGTH (type
) = 0;
15549 TYPE_LENGTH (type
) = 0;
15552 maybe_set_alignment (cu
, die
, type
);
15554 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15556 /* ICC<14 does not output the required DW_AT_declaration on
15557 incomplete types, but gives them a size of zero. */
15558 TYPE_STUB (type
) = 1;
15561 TYPE_STUB_SUPPORTED (type
) = 1;
15563 if (die_is_declaration (die
, cu
))
15564 TYPE_STUB (type
) = 1;
15565 else if (attr
== NULL
&& die
->child
== NULL
15566 && producer_is_realview (cu
->producer
))
15567 /* RealView does not output the required DW_AT_declaration
15568 on incomplete types. */
15569 TYPE_STUB (type
) = 1;
15571 /* We need to add the type field to the die immediately so we don't
15572 infinitely recurse when dealing with pointers to the structure
15573 type within the structure itself. */
15574 set_die_type (die
, type
, cu
);
15576 /* set_die_type should be already done. */
15577 set_descriptive_type (type
, die
, cu
);
15582 /* A helper for process_structure_scope that handles a single member
15586 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15587 struct field_info
*fi
,
15588 std::vector
<struct symbol
*> *template_args
,
15589 struct dwarf2_cu
*cu
)
15591 if (child_die
->tag
== DW_TAG_member
15592 || child_die
->tag
== DW_TAG_variable
15593 || child_die
->tag
== DW_TAG_variant_part
)
15595 /* NOTE: carlton/2002-11-05: A C++ static data member
15596 should be a DW_TAG_member that is a declaration, but
15597 all versions of G++ as of this writing (so through at
15598 least 3.2.1) incorrectly generate DW_TAG_variable
15599 tags for them instead. */
15600 dwarf2_add_field (fi
, child_die
, cu
);
15602 else if (child_die
->tag
== DW_TAG_subprogram
)
15604 /* Rust doesn't have member functions in the C++ sense.
15605 However, it does emit ordinary functions as children
15606 of a struct DIE. */
15607 if (cu
->language
== language_rust
)
15608 read_func_scope (child_die
, cu
);
15611 /* C++ member function. */
15612 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15615 else if (child_die
->tag
== DW_TAG_inheritance
)
15617 /* C++ base class field. */
15618 dwarf2_add_field (fi
, child_die
, cu
);
15620 else if (type_can_define_types (child_die
))
15621 dwarf2_add_type_defn (fi
, child_die
, cu
);
15622 else if (child_die
->tag
== DW_TAG_template_type_param
15623 || child_die
->tag
== DW_TAG_template_value_param
)
15625 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15628 template_args
->push_back (arg
);
15630 else if (child_die
->tag
== DW_TAG_variant
)
15632 /* In a variant we want to get the discriminant and also add a
15633 field for our sole member child. */
15634 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15636 for (die_info
*variant_child
= child_die
->child
;
15637 variant_child
!= NULL
;
15638 variant_child
= sibling_die (variant_child
))
15640 if (variant_child
->tag
== DW_TAG_member
)
15642 handle_struct_member_die (variant_child
, type
, fi
,
15643 template_args
, cu
);
15644 /* Only handle the one. */
15649 /* We don't handle this but we might as well report it if we see
15651 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15652 complaint (_("DW_AT_discr_list is not supported yet"
15653 " - DIE at %s [in module %s]"),
15654 sect_offset_str (child_die
->sect_off
),
15655 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15657 /* The first field was just added, so we can stash the
15658 discriminant there. */
15659 gdb_assert (!fi
->fields
.empty ());
15661 fi
->fields
.back ().variant
.default_branch
= true;
15663 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15667 /* Finish creating a structure or union type, including filling in
15668 its members and creating a symbol for it. */
15671 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15673 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15674 struct die_info
*child_die
;
15677 type
= get_die_type (die
, cu
);
15679 type
= read_structure_type (die
, cu
);
15681 /* When reading a DW_TAG_variant_part, we need to notice when we
15682 read the discriminant member, so we can record it later in the
15683 discriminant_info. */
15684 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15685 sect_offset discr_offset
{};
15686 bool has_template_parameters
= false;
15688 if (is_variant_part
)
15690 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15693 /* Maybe it's a univariant form, an extension we support.
15694 In this case arrange not to check the offset. */
15695 is_variant_part
= false;
15697 else if (discr
->form_is_ref ())
15699 struct dwarf2_cu
*target_cu
= cu
;
15700 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15702 discr_offset
= target_die
->sect_off
;
15706 complaint (_("DW_AT_discr does not have DIE reference form"
15707 " - DIE at %s [in module %s]"),
15708 sect_offset_str (die
->sect_off
),
15709 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15710 is_variant_part
= false;
15714 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15716 struct field_info fi
;
15717 std::vector
<struct symbol
*> template_args
;
15719 child_die
= die
->child
;
15721 while (child_die
&& child_die
->tag
)
15723 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15725 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15726 fi
.fields
.back ().variant
.is_discriminant
= true;
15728 child_die
= sibling_die (child_die
);
15731 /* Attach template arguments to type. */
15732 if (!template_args
.empty ())
15734 has_template_parameters
= true;
15735 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15736 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15737 TYPE_TEMPLATE_ARGUMENTS (type
)
15738 = XOBNEWVEC (&objfile
->objfile_obstack
,
15740 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15741 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15742 template_args
.data (),
15743 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15744 * sizeof (struct symbol
*)));
15747 /* Attach fields and member functions to the type. */
15749 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15750 if (!fi
.fnfieldlists
.empty ())
15752 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15754 /* Get the type which refers to the base class (possibly this
15755 class itself) which contains the vtable pointer for the current
15756 class from the DW_AT_containing_type attribute. This use of
15757 DW_AT_containing_type is a GNU extension. */
15759 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15761 struct type
*t
= die_containing_type (die
, cu
);
15763 set_type_vptr_basetype (type
, t
);
15768 /* Our own class provides vtbl ptr. */
15769 for (i
= TYPE_NFIELDS (t
) - 1;
15770 i
>= TYPE_N_BASECLASSES (t
);
15773 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15775 if (is_vtable_name (fieldname
, cu
))
15777 set_type_vptr_fieldno (type
, i
);
15782 /* Complain if virtual function table field not found. */
15783 if (i
< TYPE_N_BASECLASSES (t
))
15784 complaint (_("virtual function table pointer "
15785 "not found when defining class '%s'"),
15786 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15790 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15793 else if (cu
->producer
15794 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15796 /* The IBM XLC compiler does not provide direct indication
15797 of the containing type, but the vtable pointer is
15798 always named __vfp. */
15802 for (i
= TYPE_NFIELDS (type
) - 1;
15803 i
>= TYPE_N_BASECLASSES (type
);
15806 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15808 set_type_vptr_fieldno (type
, i
);
15809 set_type_vptr_basetype (type
, type
);
15816 /* Copy fi.typedef_field_list linked list elements content into the
15817 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15818 if (!fi
.typedef_field_list
.empty ())
15820 int count
= fi
.typedef_field_list
.size ();
15822 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15823 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15824 = ((struct decl_field
*)
15826 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15827 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15829 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15830 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15833 /* Copy fi.nested_types_list linked list elements content into the
15834 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15835 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15837 int count
= fi
.nested_types_list
.size ();
15839 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15840 TYPE_NESTED_TYPES_ARRAY (type
)
15841 = ((struct decl_field
*)
15842 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15843 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15845 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15846 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15850 quirk_gcc_member_function_pointer (type
, objfile
);
15851 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15852 cu
->rust_unions
.push_back (type
);
15854 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15855 snapshots) has been known to create a die giving a declaration
15856 for a class that has, as a child, a die giving a definition for a
15857 nested class. So we have to process our children even if the
15858 current die is a declaration. Normally, of course, a declaration
15859 won't have any children at all. */
15861 child_die
= die
->child
;
15863 while (child_die
!= NULL
&& child_die
->tag
)
15865 if (child_die
->tag
== DW_TAG_member
15866 || child_die
->tag
== DW_TAG_variable
15867 || child_die
->tag
== DW_TAG_inheritance
15868 || child_die
->tag
== DW_TAG_template_value_param
15869 || child_die
->tag
== DW_TAG_template_type_param
)
15874 process_die (child_die
, cu
);
15876 child_die
= sibling_die (child_die
);
15879 /* Do not consider external references. According to the DWARF standard,
15880 these DIEs are identified by the fact that they have no byte_size
15881 attribute, and a declaration attribute. */
15882 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15883 || !die_is_declaration (die
, cu
))
15885 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15887 if (has_template_parameters
)
15889 struct symtab
*symtab
;
15890 if (sym
!= nullptr)
15891 symtab
= symbol_symtab (sym
);
15892 else if (cu
->line_header
!= nullptr)
15894 /* Any related symtab will do. */
15896 = cu
->line_header
->file_names ()[0].symtab
;
15901 complaint (_("could not find suitable "
15902 "symtab for template parameter"
15903 " - DIE at %s [in module %s]"),
15904 sect_offset_str (die
->sect_off
),
15905 objfile_name (objfile
));
15908 if (symtab
!= nullptr)
15910 /* Make sure that the symtab is set on the new symbols.
15911 Even though they don't appear in this symtab directly,
15912 other parts of gdb assume that symbols do, and this is
15913 reasonably true. */
15914 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15915 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15921 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
15922 update TYPE using some information only available in DIE's children. */
15925 update_enumeration_type_from_children (struct die_info
*die
,
15927 struct dwarf2_cu
*cu
)
15929 struct die_info
*child_die
;
15930 int unsigned_enum
= 1;
15934 auto_obstack obstack
;
15936 for (child_die
= die
->child
;
15937 child_die
!= NULL
&& child_die
->tag
;
15938 child_die
= sibling_die (child_die
))
15940 struct attribute
*attr
;
15942 const gdb_byte
*bytes
;
15943 struct dwarf2_locexpr_baton
*baton
;
15946 if (child_die
->tag
!= DW_TAG_enumerator
)
15949 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15953 name
= dwarf2_name (child_die
, cu
);
15955 name
= "<anonymous enumerator>";
15957 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15958 &value
, &bytes
, &baton
);
15964 else if ((mask
& value
) != 0)
15969 /* If we already know that the enum type is neither unsigned, nor
15970 a flag type, no need to look at the rest of the enumerates. */
15971 if (!unsigned_enum
&& !flag_enum
)
15976 TYPE_UNSIGNED (type
) = 1;
15978 TYPE_FLAG_ENUM (type
) = 1;
15981 /* Given a DW_AT_enumeration_type die, set its type. We do not
15982 complete the type's fields yet, or create any symbols. */
15984 static struct type
*
15985 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15987 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15989 struct attribute
*attr
;
15992 /* If the definition of this type lives in .debug_types, read that type.
15993 Don't follow DW_AT_specification though, that will take us back up
15994 the chain and we want to go down. */
15995 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15996 if (attr
!= nullptr)
15998 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16000 /* The type's CU may not be the same as CU.
16001 Ensure TYPE is recorded with CU in die_type_hash. */
16002 return set_die_type (die
, type
, cu
);
16005 type
= alloc_type (objfile
);
16007 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16008 name
= dwarf2_full_name (NULL
, die
, cu
);
16010 TYPE_NAME (type
) = name
;
16012 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16015 struct type
*underlying_type
= die_type (die
, cu
);
16017 TYPE_TARGET_TYPE (type
) = underlying_type
;
16020 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16021 if (attr
!= nullptr)
16023 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16027 TYPE_LENGTH (type
) = 0;
16030 maybe_set_alignment (cu
, die
, type
);
16032 /* The enumeration DIE can be incomplete. In Ada, any type can be
16033 declared as private in the package spec, and then defined only
16034 inside the package body. Such types are known as Taft Amendment
16035 Types. When another package uses such a type, an incomplete DIE
16036 may be generated by the compiler. */
16037 if (die_is_declaration (die
, cu
))
16038 TYPE_STUB (type
) = 1;
16040 /* Finish the creation of this type by using the enum's children.
16041 We must call this even when the underlying type has been provided
16042 so that we can determine if we're looking at a "flag" enum. */
16043 update_enumeration_type_from_children (die
, type
, cu
);
16045 /* If this type has an underlying type that is not a stub, then we
16046 may use its attributes. We always use the "unsigned" attribute
16047 in this situation, because ordinarily we guess whether the type
16048 is unsigned -- but the guess can be wrong and the underlying type
16049 can tell us the reality. However, we defer to a local size
16050 attribute if one exists, because this lets the compiler override
16051 the underlying type if needed. */
16052 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16054 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16055 if (TYPE_LENGTH (type
) == 0)
16056 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16057 if (TYPE_RAW_ALIGN (type
) == 0
16058 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16059 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16062 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16064 return set_die_type (die
, type
, cu
);
16067 /* Given a pointer to a die which begins an enumeration, process all
16068 the dies that define the members of the enumeration, and create the
16069 symbol for the enumeration type.
16071 NOTE: We reverse the order of the element list. */
16074 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16076 struct type
*this_type
;
16078 this_type
= get_die_type (die
, cu
);
16079 if (this_type
== NULL
)
16080 this_type
= read_enumeration_type (die
, cu
);
16082 if (die
->child
!= NULL
)
16084 struct die_info
*child_die
;
16085 struct symbol
*sym
;
16086 std::vector
<struct field
> fields
;
16089 child_die
= die
->child
;
16090 while (child_die
&& child_die
->tag
)
16092 if (child_die
->tag
!= DW_TAG_enumerator
)
16094 process_die (child_die
, cu
);
16098 name
= dwarf2_name (child_die
, cu
);
16101 sym
= new_symbol (child_die
, this_type
, cu
);
16103 fields
.emplace_back ();
16104 struct field
&field
= fields
.back ();
16106 FIELD_NAME (field
) = sym
->linkage_name ();
16107 FIELD_TYPE (field
) = NULL
;
16108 SET_FIELD_ENUMVAL (field
, SYMBOL_VALUE (sym
));
16109 FIELD_BITSIZE (field
) = 0;
16113 child_die
= sibling_die (child_die
);
16116 if (!fields
.empty ())
16118 TYPE_NFIELDS (this_type
) = fields
.size ();
16119 TYPE_FIELDS (this_type
) = (struct field
*)
16120 TYPE_ALLOC (this_type
, sizeof (struct field
) * fields
.size ());
16121 memcpy (TYPE_FIELDS (this_type
), fields
.data (),
16122 sizeof (struct field
) * fields
.size ());
16126 /* If we are reading an enum from a .debug_types unit, and the enum
16127 is a declaration, and the enum is not the signatured type in the
16128 unit, then we do not want to add a symbol for it. Adding a
16129 symbol would in some cases obscure the true definition of the
16130 enum, giving users an incomplete type when the definition is
16131 actually available. Note that we do not want to do this for all
16132 enums which are just declarations, because C++0x allows forward
16133 enum declarations. */
16134 if (cu
->per_cu
->is_debug_types
16135 && die_is_declaration (die
, cu
))
16137 struct signatured_type
*sig_type
;
16139 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16140 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16141 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16145 new_symbol (die
, this_type
, cu
);
16148 /* Extract all information from a DW_TAG_array_type DIE and put it in
16149 the DIE's type field. For now, this only handles one dimensional
16152 static struct type
*
16153 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16155 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16156 struct die_info
*child_die
;
16158 struct type
*element_type
, *range_type
, *index_type
;
16159 struct attribute
*attr
;
16161 struct dynamic_prop
*byte_stride_prop
= NULL
;
16162 unsigned int bit_stride
= 0;
16164 element_type
= die_type (die
, cu
);
16166 /* The die_type call above may have already set the type for this DIE. */
16167 type
= get_die_type (die
, cu
);
16171 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16175 struct type
*prop_type
16176 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
16179 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16180 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16184 complaint (_("unable to read array DW_AT_byte_stride "
16185 " - DIE at %s [in module %s]"),
16186 sect_offset_str (die
->sect_off
),
16187 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16188 /* Ignore this attribute. We will likely not be able to print
16189 arrays of this type correctly, but there is little we can do
16190 to help if we cannot read the attribute's value. */
16191 byte_stride_prop
= NULL
;
16195 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16197 bit_stride
= DW_UNSND (attr
);
16199 /* Irix 6.2 native cc creates array types without children for
16200 arrays with unspecified length. */
16201 if (die
->child
== NULL
)
16203 index_type
= objfile_type (objfile
)->builtin_int
;
16204 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16205 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16206 byte_stride_prop
, bit_stride
);
16207 return set_die_type (die
, type
, cu
);
16210 std::vector
<struct type
*> range_types
;
16211 child_die
= die
->child
;
16212 while (child_die
&& child_die
->tag
)
16214 if (child_die
->tag
== DW_TAG_subrange_type
)
16216 struct type
*child_type
= read_type_die (child_die
, cu
);
16218 if (child_type
!= NULL
)
16220 /* The range type was succesfully read. Save it for the
16221 array type creation. */
16222 range_types
.push_back (child_type
);
16225 child_die
= sibling_die (child_die
);
16228 /* Dwarf2 dimensions are output from left to right, create the
16229 necessary array types in backwards order. */
16231 type
= element_type
;
16233 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16237 while (i
< range_types
.size ())
16238 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16239 byte_stride_prop
, bit_stride
);
16243 size_t ndim
= range_types
.size ();
16245 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16246 byte_stride_prop
, bit_stride
);
16249 /* Understand Dwarf2 support for vector types (like they occur on
16250 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16251 array type. This is not part of the Dwarf2/3 standard yet, but a
16252 custom vendor extension. The main difference between a regular
16253 array and the vector variant is that vectors are passed by value
16255 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16256 if (attr
!= nullptr)
16257 make_vector_type (type
);
16259 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16260 implementation may choose to implement triple vectors using this
16262 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16263 if (attr
!= nullptr)
16265 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16266 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16268 complaint (_("DW_AT_byte_size for array type smaller "
16269 "than the total size of elements"));
16272 name
= dwarf2_name (die
, cu
);
16274 TYPE_NAME (type
) = name
;
16276 maybe_set_alignment (cu
, die
, type
);
16278 /* Install the type in the die. */
16279 set_die_type (die
, type
, cu
);
16281 /* set_die_type should be already done. */
16282 set_descriptive_type (type
, die
, cu
);
16287 static enum dwarf_array_dim_ordering
16288 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16290 struct attribute
*attr
;
16292 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16294 if (attr
!= nullptr)
16295 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16297 /* GNU F77 is a special case, as at 08/2004 array type info is the
16298 opposite order to the dwarf2 specification, but data is still
16299 laid out as per normal fortran.
16301 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16302 version checking. */
16304 if (cu
->language
== language_fortran
16305 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16307 return DW_ORD_row_major
;
16310 switch (cu
->language_defn
->la_array_ordering
)
16312 case array_column_major
:
16313 return DW_ORD_col_major
;
16314 case array_row_major
:
16316 return DW_ORD_row_major
;
16320 /* Extract all information from a DW_TAG_set_type DIE and put it in
16321 the DIE's type field. */
16323 static struct type
*
16324 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16326 struct type
*domain_type
, *set_type
;
16327 struct attribute
*attr
;
16329 domain_type
= die_type (die
, cu
);
16331 /* The die_type call above may have already set the type for this DIE. */
16332 set_type
= get_die_type (die
, cu
);
16336 set_type
= create_set_type (NULL
, domain_type
);
16338 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16339 if (attr
!= nullptr)
16340 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16342 maybe_set_alignment (cu
, die
, set_type
);
16344 return set_die_type (die
, set_type
, cu
);
16347 /* A helper for read_common_block that creates a locexpr baton.
16348 SYM is the symbol which we are marking as computed.
16349 COMMON_DIE is the DIE for the common block.
16350 COMMON_LOC is the location expression attribute for the common
16352 MEMBER_LOC is the location expression attribute for the particular
16353 member of the common block that we are processing.
16354 CU is the CU from which the above come. */
16357 mark_common_block_symbol_computed (struct symbol
*sym
,
16358 struct die_info
*common_die
,
16359 struct attribute
*common_loc
,
16360 struct attribute
*member_loc
,
16361 struct dwarf2_cu
*cu
)
16363 struct dwarf2_per_objfile
*dwarf2_per_objfile
16364 = cu
->per_cu
->dwarf2_per_objfile
;
16365 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16366 struct dwarf2_locexpr_baton
*baton
;
16368 unsigned int cu_off
;
16369 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16370 LONGEST offset
= 0;
16372 gdb_assert (common_loc
&& member_loc
);
16373 gdb_assert (common_loc
->form_is_block ());
16374 gdb_assert (member_loc
->form_is_block ()
16375 || member_loc
->form_is_constant ());
16377 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16378 baton
->per_cu
= cu
->per_cu
;
16379 gdb_assert (baton
->per_cu
);
16381 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16383 if (member_loc
->form_is_constant ())
16385 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16386 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16389 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16391 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16394 *ptr
++ = DW_OP_call4
;
16395 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16396 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16399 if (member_loc
->form_is_constant ())
16401 *ptr
++ = DW_OP_addr
;
16402 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16403 ptr
+= cu
->header
.addr_size
;
16407 /* We have to copy the data here, because DW_OP_call4 will only
16408 use a DW_AT_location attribute. */
16409 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16410 ptr
+= DW_BLOCK (member_loc
)->size
;
16413 *ptr
++ = DW_OP_plus
;
16414 gdb_assert (ptr
- baton
->data
== baton
->size
);
16416 SYMBOL_LOCATION_BATON (sym
) = baton
;
16417 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16420 /* Create appropriate locally-scoped variables for all the
16421 DW_TAG_common_block entries. Also create a struct common_block
16422 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16423 is used to separate the common blocks name namespace from regular
16427 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16429 struct attribute
*attr
;
16431 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16432 if (attr
!= nullptr)
16434 /* Support the .debug_loc offsets. */
16435 if (attr
->form_is_block ())
16439 else if (attr
->form_is_section_offset ())
16441 dwarf2_complex_location_expr_complaint ();
16446 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16447 "common block member");
16452 if (die
->child
!= NULL
)
16454 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16455 struct die_info
*child_die
;
16456 size_t n_entries
= 0, size
;
16457 struct common_block
*common_block
;
16458 struct symbol
*sym
;
16460 for (child_die
= die
->child
;
16461 child_die
&& child_die
->tag
;
16462 child_die
= sibling_die (child_die
))
16465 size
= (sizeof (struct common_block
)
16466 + (n_entries
- 1) * sizeof (struct symbol
*));
16468 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16470 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16471 common_block
->n_entries
= 0;
16473 for (child_die
= die
->child
;
16474 child_die
&& child_die
->tag
;
16475 child_die
= sibling_die (child_die
))
16477 /* Create the symbol in the DW_TAG_common_block block in the current
16479 sym
= new_symbol (child_die
, NULL
, cu
);
16482 struct attribute
*member_loc
;
16484 common_block
->contents
[common_block
->n_entries
++] = sym
;
16486 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16490 /* GDB has handled this for a long time, but it is
16491 not specified by DWARF. It seems to have been
16492 emitted by gfortran at least as recently as:
16493 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16494 complaint (_("Variable in common block has "
16495 "DW_AT_data_member_location "
16496 "- DIE at %s [in module %s]"),
16497 sect_offset_str (child_die
->sect_off
),
16498 objfile_name (objfile
));
16500 if (member_loc
->form_is_section_offset ())
16501 dwarf2_complex_location_expr_complaint ();
16502 else if (member_loc
->form_is_constant ()
16503 || member_loc
->form_is_block ())
16505 if (attr
!= nullptr)
16506 mark_common_block_symbol_computed (sym
, die
, attr
,
16510 dwarf2_complex_location_expr_complaint ();
16515 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16516 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16520 /* Create a type for a C++ namespace. */
16522 static struct type
*
16523 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16525 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16526 const char *previous_prefix
, *name
;
16530 /* For extensions, reuse the type of the original namespace. */
16531 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16533 struct die_info
*ext_die
;
16534 struct dwarf2_cu
*ext_cu
= cu
;
16536 ext_die
= dwarf2_extension (die
, &ext_cu
);
16537 type
= read_type_die (ext_die
, ext_cu
);
16539 /* EXT_CU may not be the same as CU.
16540 Ensure TYPE is recorded with CU in die_type_hash. */
16541 return set_die_type (die
, type
, cu
);
16544 name
= namespace_name (die
, &is_anonymous
, cu
);
16546 /* Now build the name of the current namespace. */
16548 previous_prefix
= determine_prefix (die
, cu
);
16549 if (previous_prefix
[0] != '\0')
16550 name
= typename_concat (&objfile
->objfile_obstack
,
16551 previous_prefix
, name
, 0, cu
);
16553 /* Create the type. */
16554 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16556 return set_die_type (die
, type
, cu
);
16559 /* Read a namespace scope. */
16562 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16564 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16567 /* Add a symbol associated to this if we haven't seen the namespace
16568 before. Also, add a using directive if it's an anonymous
16571 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16575 type
= read_type_die (die
, cu
);
16576 new_symbol (die
, type
, cu
);
16578 namespace_name (die
, &is_anonymous
, cu
);
16581 const char *previous_prefix
= determine_prefix (die
, cu
);
16583 std::vector
<const char *> excludes
;
16584 add_using_directive (using_directives (cu
),
16585 previous_prefix
, TYPE_NAME (type
), NULL
,
16586 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16590 if (die
->child
!= NULL
)
16592 struct die_info
*child_die
= die
->child
;
16594 while (child_die
&& child_die
->tag
)
16596 process_die (child_die
, cu
);
16597 child_die
= sibling_die (child_die
);
16602 /* Read a Fortran module as type. This DIE can be only a declaration used for
16603 imported module. Still we need that type as local Fortran "use ... only"
16604 declaration imports depend on the created type in determine_prefix. */
16606 static struct type
*
16607 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16609 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16610 const char *module_name
;
16613 module_name
= dwarf2_name (die
, cu
);
16614 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16616 return set_die_type (die
, type
, cu
);
16619 /* Read a Fortran module. */
16622 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16624 struct die_info
*child_die
= die
->child
;
16627 type
= read_type_die (die
, cu
);
16628 new_symbol (die
, type
, cu
);
16630 while (child_die
&& child_die
->tag
)
16632 process_die (child_die
, cu
);
16633 child_die
= sibling_die (child_die
);
16637 /* Return the name of the namespace represented by DIE. Set
16638 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16641 static const char *
16642 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16644 struct die_info
*current_die
;
16645 const char *name
= NULL
;
16647 /* Loop through the extensions until we find a name. */
16649 for (current_die
= die
;
16650 current_die
!= NULL
;
16651 current_die
= dwarf2_extension (die
, &cu
))
16653 /* We don't use dwarf2_name here so that we can detect the absence
16654 of a name -> anonymous namespace. */
16655 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16661 /* Is it an anonymous namespace? */
16663 *is_anonymous
= (name
== NULL
);
16665 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16670 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16671 the user defined type vector. */
16673 static struct type
*
16674 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16676 struct gdbarch
*gdbarch
16677 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16678 struct comp_unit_head
*cu_header
= &cu
->header
;
16680 struct attribute
*attr_byte_size
;
16681 struct attribute
*attr_address_class
;
16682 int byte_size
, addr_class
;
16683 struct type
*target_type
;
16685 target_type
= die_type (die
, cu
);
16687 /* The die_type call above may have already set the type for this DIE. */
16688 type
= get_die_type (die
, cu
);
16692 type
= lookup_pointer_type (target_type
);
16694 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16695 if (attr_byte_size
)
16696 byte_size
= DW_UNSND (attr_byte_size
);
16698 byte_size
= cu_header
->addr_size
;
16700 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16701 if (attr_address_class
)
16702 addr_class
= DW_UNSND (attr_address_class
);
16704 addr_class
= DW_ADDR_none
;
16706 ULONGEST alignment
= get_alignment (cu
, die
);
16708 /* If the pointer size, alignment, or address class is different
16709 than the default, create a type variant marked as such and set
16710 the length accordingly. */
16711 if (TYPE_LENGTH (type
) != byte_size
16712 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16713 && alignment
!= TYPE_RAW_ALIGN (type
))
16714 || addr_class
!= DW_ADDR_none
)
16716 if (gdbarch_address_class_type_flags_p (gdbarch
))
16720 type_flags
= gdbarch_address_class_type_flags
16721 (gdbarch
, byte_size
, addr_class
);
16722 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16724 type
= make_type_with_address_space (type
, type_flags
);
16726 else if (TYPE_LENGTH (type
) != byte_size
)
16728 complaint (_("invalid pointer size %d"), byte_size
);
16730 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16732 complaint (_("Invalid DW_AT_alignment"
16733 " - DIE at %s [in module %s]"),
16734 sect_offset_str (die
->sect_off
),
16735 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16739 /* Should we also complain about unhandled address classes? */
16743 TYPE_LENGTH (type
) = byte_size
;
16744 set_type_align (type
, alignment
);
16745 return set_die_type (die
, type
, cu
);
16748 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16749 the user defined type vector. */
16751 static struct type
*
16752 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16755 struct type
*to_type
;
16756 struct type
*domain
;
16758 to_type
= die_type (die
, cu
);
16759 domain
= die_containing_type (die
, cu
);
16761 /* The calls above may have already set the type for this DIE. */
16762 type
= get_die_type (die
, cu
);
16766 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16767 type
= lookup_methodptr_type (to_type
);
16768 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16770 struct type
*new_type
16771 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16773 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16774 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16775 TYPE_VARARGS (to_type
));
16776 type
= lookup_methodptr_type (new_type
);
16779 type
= lookup_memberptr_type (to_type
, domain
);
16781 return set_die_type (die
, type
, cu
);
16784 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16785 the user defined type vector. */
16787 static struct type
*
16788 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16789 enum type_code refcode
)
16791 struct comp_unit_head
*cu_header
= &cu
->header
;
16792 struct type
*type
, *target_type
;
16793 struct attribute
*attr
;
16795 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16797 target_type
= die_type (die
, cu
);
16799 /* The die_type call above may have already set the type for this DIE. */
16800 type
= get_die_type (die
, cu
);
16804 type
= lookup_reference_type (target_type
, refcode
);
16805 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16806 if (attr
!= nullptr)
16808 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16812 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16814 maybe_set_alignment (cu
, die
, type
);
16815 return set_die_type (die
, type
, cu
);
16818 /* Add the given cv-qualifiers to the element type of the array. GCC
16819 outputs DWARF type qualifiers that apply to an array, not the
16820 element type. But GDB relies on the array element type to carry
16821 the cv-qualifiers. This mimics section 6.7.3 of the C99
16824 static struct type
*
16825 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16826 struct type
*base_type
, int cnst
, int voltl
)
16828 struct type
*el_type
, *inner_array
;
16830 base_type
= copy_type (base_type
);
16831 inner_array
= base_type
;
16833 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16835 TYPE_TARGET_TYPE (inner_array
) =
16836 copy_type (TYPE_TARGET_TYPE (inner_array
));
16837 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16840 el_type
= TYPE_TARGET_TYPE (inner_array
);
16841 cnst
|= TYPE_CONST (el_type
);
16842 voltl
|= TYPE_VOLATILE (el_type
);
16843 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16845 return set_die_type (die
, base_type
, cu
);
16848 static struct type
*
16849 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16851 struct type
*base_type
, *cv_type
;
16853 base_type
= die_type (die
, cu
);
16855 /* The die_type call above may have already set the type for this DIE. */
16856 cv_type
= get_die_type (die
, cu
);
16860 /* In case the const qualifier is applied to an array type, the element type
16861 is so qualified, not the array type (section 6.7.3 of C99). */
16862 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16863 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16865 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16866 return set_die_type (die
, cv_type
, cu
);
16869 static struct type
*
16870 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16872 struct type
*base_type
, *cv_type
;
16874 base_type
= die_type (die
, cu
);
16876 /* The die_type call above may have already set the type for this DIE. */
16877 cv_type
= get_die_type (die
, cu
);
16881 /* In case the volatile qualifier is applied to an array type, the
16882 element type is so qualified, not the array type (section 6.7.3
16884 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16885 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16887 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16888 return set_die_type (die
, cv_type
, cu
);
16891 /* Handle DW_TAG_restrict_type. */
16893 static struct type
*
16894 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16896 struct type
*base_type
, *cv_type
;
16898 base_type
= die_type (die
, cu
);
16900 /* The die_type call above may have already set the type for this DIE. */
16901 cv_type
= get_die_type (die
, cu
);
16905 cv_type
= make_restrict_type (base_type
);
16906 return set_die_type (die
, cv_type
, cu
);
16909 /* Handle DW_TAG_atomic_type. */
16911 static struct type
*
16912 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16914 struct type
*base_type
, *cv_type
;
16916 base_type
= die_type (die
, cu
);
16918 /* The die_type call above may have already set the type for this DIE. */
16919 cv_type
= get_die_type (die
, cu
);
16923 cv_type
= make_atomic_type (base_type
);
16924 return set_die_type (die
, cv_type
, cu
);
16927 /* Extract all information from a DW_TAG_string_type DIE and add to
16928 the user defined type vector. It isn't really a user defined type,
16929 but it behaves like one, with other DIE's using an AT_user_def_type
16930 attribute to reference it. */
16932 static struct type
*
16933 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16935 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16936 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16937 struct type
*type
, *range_type
, *index_type
, *char_type
;
16938 struct attribute
*attr
;
16939 struct dynamic_prop prop
;
16940 bool length_is_constant
= true;
16943 /* There are a couple of places where bit sizes might be made use of
16944 when parsing a DW_TAG_string_type, however, no producer that we know
16945 of make use of these. Handling bit sizes that are a multiple of the
16946 byte size is easy enough, but what about other bit sizes? Lets deal
16947 with that problem when we have to. Warn about these attributes being
16948 unsupported, then parse the type and ignore them like we always
16950 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16951 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16953 static bool warning_printed
= false;
16954 if (!warning_printed
)
16956 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16957 "currently supported on DW_TAG_string_type."));
16958 warning_printed
= true;
16962 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16963 if (attr
!= nullptr && !attr
->form_is_constant ())
16965 /* The string length describes the location at which the length of
16966 the string can be found. The size of the length field can be
16967 specified with one of the attributes below. */
16968 struct type
*prop_type
;
16969 struct attribute
*len
16970 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16971 if (len
== nullptr)
16972 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16973 if (len
!= nullptr && len
->form_is_constant ())
16975 /* Pass 0 as the default as we know this attribute is constant
16976 and the default value will not be returned. */
16977 LONGEST sz
= dwarf2_get_attr_constant_value (len
, 0);
16978 prop_type
= dwarf2_per_cu_int_type (cu
->per_cu
, sz
, true);
16982 /* If the size is not specified then we assume it is the size of
16983 an address on this target. */
16984 prop_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, true);
16987 /* Convert the attribute into a dynamic property. */
16988 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16991 length_is_constant
= false;
16993 else if (attr
!= nullptr)
16995 /* This DW_AT_string_length just contains the length with no
16996 indirection. There's no need to create a dynamic property in this
16997 case. Pass 0 for the default value as we know it will not be
16998 returned in this case. */
16999 length
= dwarf2_get_attr_constant_value (attr
, 0);
17001 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17003 /* We don't currently support non-constant byte sizes for strings. */
17004 length
= dwarf2_get_attr_constant_value (attr
, 1);
17008 /* Use 1 as a fallback length if we have nothing else. */
17012 index_type
= objfile_type (objfile
)->builtin_int
;
17013 if (length_is_constant
)
17014 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17017 struct dynamic_prop low_bound
;
17019 low_bound
.kind
= PROP_CONST
;
17020 low_bound
.data
.const_val
= 1;
17021 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
17023 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17024 type
= create_string_type (NULL
, char_type
, range_type
);
17026 return set_die_type (die
, type
, cu
);
17029 /* Assuming that DIE corresponds to a function, returns nonzero
17030 if the function is prototyped. */
17033 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17035 struct attribute
*attr
;
17037 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17038 if (attr
&& (DW_UNSND (attr
) != 0))
17041 /* The DWARF standard implies that the DW_AT_prototyped attribute
17042 is only meaningful for C, but the concept also extends to other
17043 languages that allow unprototyped functions (Eg: Objective C).
17044 For all other languages, assume that functions are always
17046 if (cu
->language
!= language_c
17047 && cu
->language
!= language_objc
17048 && cu
->language
!= language_opencl
)
17051 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17052 prototyped and unprototyped functions; default to prototyped,
17053 since that is more common in modern code (and RealView warns
17054 about unprototyped functions). */
17055 if (producer_is_realview (cu
->producer
))
17061 /* Handle DIES due to C code like:
17065 int (*funcp)(int a, long l);
17069 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17071 static struct type
*
17072 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17074 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17075 struct type
*type
; /* Type that this function returns. */
17076 struct type
*ftype
; /* Function that returns above type. */
17077 struct attribute
*attr
;
17079 type
= die_type (die
, cu
);
17081 /* The die_type call above may have already set the type for this DIE. */
17082 ftype
= get_die_type (die
, cu
);
17086 ftype
= lookup_function_type (type
);
17088 if (prototyped_function_p (die
, cu
))
17089 TYPE_PROTOTYPED (ftype
) = 1;
17091 /* Store the calling convention in the type if it's available in
17092 the subroutine die. Otherwise set the calling convention to
17093 the default value DW_CC_normal. */
17094 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17095 if (attr
!= nullptr
17096 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17097 TYPE_CALLING_CONVENTION (ftype
)
17098 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17099 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17100 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17102 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17104 /* Record whether the function returns normally to its caller or not
17105 if the DWARF producer set that information. */
17106 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17107 if (attr
&& (DW_UNSND (attr
) != 0))
17108 TYPE_NO_RETURN (ftype
) = 1;
17110 /* We need to add the subroutine type to the die immediately so
17111 we don't infinitely recurse when dealing with parameters
17112 declared as the same subroutine type. */
17113 set_die_type (die
, ftype
, cu
);
17115 if (die
->child
!= NULL
)
17117 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17118 struct die_info
*child_die
;
17119 int nparams
, iparams
;
17121 /* Count the number of parameters.
17122 FIXME: GDB currently ignores vararg functions, but knows about
17123 vararg member functions. */
17125 child_die
= die
->child
;
17126 while (child_die
&& child_die
->tag
)
17128 if (child_die
->tag
== DW_TAG_formal_parameter
)
17130 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17131 TYPE_VARARGS (ftype
) = 1;
17132 child_die
= sibling_die (child_die
);
17135 /* Allocate storage for parameters and fill them in. */
17136 TYPE_NFIELDS (ftype
) = nparams
;
17137 TYPE_FIELDS (ftype
) = (struct field
*)
17138 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17140 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17141 even if we error out during the parameters reading below. */
17142 for (iparams
= 0; iparams
< nparams
; iparams
++)
17143 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17146 child_die
= die
->child
;
17147 while (child_die
&& child_die
->tag
)
17149 if (child_die
->tag
== DW_TAG_formal_parameter
)
17151 struct type
*arg_type
;
17153 /* DWARF version 2 has no clean way to discern C++
17154 static and non-static member functions. G++ helps
17155 GDB by marking the first parameter for non-static
17156 member functions (which is the this pointer) as
17157 artificial. We pass this information to
17158 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17160 DWARF version 3 added DW_AT_object_pointer, which GCC
17161 4.5 does not yet generate. */
17162 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17163 if (attr
!= nullptr)
17164 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17166 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17167 arg_type
= die_type (child_die
, cu
);
17169 /* RealView does not mark THIS as const, which the testsuite
17170 expects. GCC marks THIS as const in method definitions,
17171 but not in the class specifications (GCC PR 43053). */
17172 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17173 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17176 struct dwarf2_cu
*arg_cu
= cu
;
17177 const char *name
= dwarf2_name (child_die
, cu
);
17179 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17180 if (attr
!= nullptr)
17182 /* If the compiler emits this, use it. */
17183 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17186 else if (name
&& strcmp (name
, "this") == 0)
17187 /* Function definitions will have the argument names. */
17189 else if (name
== NULL
&& iparams
== 0)
17190 /* Declarations may not have the names, so like
17191 elsewhere in GDB, assume an artificial first
17192 argument is "this". */
17196 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17200 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17203 child_die
= sibling_die (child_die
);
17210 static struct type
*
17211 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17213 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17214 const char *name
= NULL
;
17215 struct type
*this_type
, *target_type
;
17217 name
= dwarf2_full_name (NULL
, die
, cu
);
17218 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17219 TYPE_TARGET_STUB (this_type
) = 1;
17220 set_die_type (die
, this_type
, cu
);
17221 target_type
= die_type (die
, cu
);
17222 if (target_type
!= this_type
)
17223 TYPE_TARGET_TYPE (this_type
) = target_type
;
17226 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17227 spec and cause infinite loops in GDB. */
17228 complaint (_("Self-referential DW_TAG_typedef "
17229 "- DIE at %s [in module %s]"),
17230 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17231 TYPE_TARGET_TYPE (this_type
) = NULL
;
17236 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17237 (which may be different from NAME) to the architecture back-end to allow
17238 it to guess the correct format if necessary. */
17240 static struct type
*
17241 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17242 const char *name_hint
, enum bfd_endian byte_order
)
17244 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17245 const struct floatformat
**format
;
17248 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17250 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17252 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17257 /* Allocate an integer type of size BITS and name NAME. */
17259 static struct type
*
17260 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17261 int bits
, int unsigned_p
, const char *name
)
17265 /* Versions of Intel's C Compiler generate an integer type called "void"
17266 instead of using DW_TAG_unspecified_type. This has been seen on
17267 at least versions 14, 17, and 18. */
17268 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17269 && strcmp (name
, "void") == 0)
17270 type
= objfile_type (objfile
)->builtin_void
;
17272 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17277 /* Initialise and return a floating point type of size BITS suitable for
17278 use as a component of a complex number. The NAME_HINT is passed through
17279 when initialising the floating point type and is the name of the complex
17282 As DWARF doesn't currently provide an explicit name for the components
17283 of a complex number, but it can be helpful to have these components
17284 named, we try to select a suitable name based on the size of the
17286 static struct type
*
17287 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17288 struct objfile
*objfile
,
17289 int bits
, const char *name_hint
,
17290 enum bfd_endian byte_order
)
17292 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17293 struct type
*tt
= nullptr;
17295 /* Try to find a suitable floating point builtin type of size BITS.
17296 We're going to use the name of this type as the name for the complex
17297 target type that we are about to create. */
17298 switch (cu
->language
)
17300 case language_fortran
:
17304 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17307 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17309 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17311 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17319 tt
= builtin_type (gdbarch
)->builtin_float
;
17322 tt
= builtin_type (gdbarch
)->builtin_double
;
17324 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17326 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17332 /* If the type we found doesn't match the size we were looking for, then
17333 pretend we didn't find a type at all, the complex target type we
17334 create will then be nameless. */
17335 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17338 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17339 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17342 /* Find a representation of a given base type and install
17343 it in the TYPE field of the die. */
17345 static struct type
*
17346 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17348 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17350 struct attribute
*attr
;
17351 int encoding
= 0, bits
= 0;
17355 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17356 if (attr
!= nullptr)
17357 encoding
= DW_UNSND (attr
);
17358 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17359 if (attr
!= nullptr)
17360 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17361 name
= dwarf2_name (die
, cu
);
17363 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17365 arch
= get_objfile_arch (objfile
);
17366 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17368 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17371 int endianity
= DW_UNSND (attr
);
17376 byte_order
= BFD_ENDIAN_BIG
;
17378 case DW_END_little
:
17379 byte_order
= BFD_ENDIAN_LITTLE
;
17382 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17389 case DW_ATE_address
:
17390 /* Turn DW_ATE_address into a void * pointer. */
17391 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17392 type
= init_pointer_type (objfile
, bits
, name
, type
);
17394 case DW_ATE_boolean
:
17395 type
= init_boolean_type (objfile
, bits
, 1, name
);
17397 case DW_ATE_complex_float
:
17398 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17400 type
= init_complex_type (objfile
, name
, type
);
17402 case DW_ATE_decimal_float
:
17403 type
= init_decfloat_type (objfile
, bits
, name
);
17406 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17408 case DW_ATE_signed
:
17409 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17411 case DW_ATE_unsigned
:
17412 if (cu
->language
== language_fortran
17414 && startswith (name
, "character("))
17415 type
= init_character_type (objfile
, bits
, 1, name
);
17417 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17419 case DW_ATE_signed_char
:
17420 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17421 || cu
->language
== language_pascal
17422 || cu
->language
== language_fortran
)
17423 type
= init_character_type (objfile
, bits
, 0, name
);
17425 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17427 case DW_ATE_unsigned_char
:
17428 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17429 || cu
->language
== language_pascal
17430 || cu
->language
== language_fortran
17431 || cu
->language
== language_rust
)
17432 type
= init_character_type (objfile
, bits
, 1, name
);
17434 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17439 type
= builtin_type (arch
)->builtin_char16
;
17440 else if (bits
== 32)
17441 type
= builtin_type (arch
)->builtin_char32
;
17444 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17446 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17448 return set_die_type (die
, type
, cu
);
17453 complaint (_("unsupported DW_AT_encoding: '%s'"),
17454 dwarf_type_encoding_name (encoding
));
17455 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17459 if (name
&& strcmp (name
, "char") == 0)
17460 TYPE_NOSIGN (type
) = 1;
17462 maybe_set_alignment (cu
, die
, type
);
17464 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17466 return set_die_type (die
, type
, cu
);
17469 /* Parse dwarf attribute if it's a block, reference or constant and put the
17470 resulting value of the attribute into struct bound_prop.
17471 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17474 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17475 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17476 struct type
*default_type
)
17478 struct dwarf2_property_baton
*baton
;
17479 struct obstack
*obstack
17480 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17482 gdb_assert (default_type
!= NULL
);
17484 if (attr
== NULL
|| prop
== NULL
)
17487 if (attr
->form_is_block ())
17489 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17490 baton
->property_type
= default_type
;
17491 baton
->locexpr
.per_cu
= cu
->per_cu
;
17492 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17493 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17494 switch (attr
->name
)
17496 case DW_AT_string_length
:
17497 baton
->locexpr
.is_reference
= true;
17500 baton
->locexpr
.is_reference
= false;
17503 prop
->data
.baton
= baton
;
17504 prop
->kind
= PROP_LOCEXPR
;
17505 gdb_assert (prop
->data
.baton
!= NULL
);
17507 else if (attr
->form_is_ref ())
17509 struct dwarf2_cu
*target_cu
= cu
;
17510 struct die_info
*target_die
;
17511 struct attribute
*target_attr
;
17513 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17514 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17515 if (target_attr
== NULL
)
17516 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17518 if (target_attr
== NULL
)
17521 switch (target_attr
->name
)
17523 case DW_AT_location
:
17524 if (target_attr
->form_is_section_offset ())
17526 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17527 baton
->property_type
= die_type (target_die
, target_cu
);
17528 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17529 prop
->data
.baton
= baton
;
17530 prop
->kind
= PROP_LOCLIST
;
17531 gdb_assert (prop
->data
.baton
!= NULL
);
17533 else if (target_attr
->form_is_block ())
17535 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17536 baton
->property_type
= die_type (target_die
, target_cu
);
17537 baton
->locexpr
.per_cu
= cu
->per_cu
;
17538 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17539 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17540 baton
->locexpr
.is_reference
= true;
17541 prop
->data
.baton
= baton
;
17542 prop
->kind
= PROP_LOCEXPR
;
17543 gdb_assert (prop
->data
.baton
!= NULL
);
17547 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17548 "dynamic property");
17552 case DW_AT_data_member_location
:
17556 if (!handle_data_member_location (target_die
, target_cu
,
17560 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17561 baton
->property_type
= read_type_die (target_die
->parent
,
17563 baton
->offset_info
.offset
= offset
;
17564 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17565 prop
->data
.baton
= baton
;
17566 prop
->kind
= PROP_ADDR_OFFSET
;
17571 else if (attr
->form_is_constant ())
17573 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17574 prop
->kind
= PROP_CONST
;
17578 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17579 dwarf2_name (die
, cu
));
17586 /* Find an integer type SIZE_IN_BYTES bytes in size and return it.
17587 UNSIGNED_P controls if the integer is unsigned or not. */
17589 static struct type
*
17590 dwarf2_per_cu_int_type (struct dwarf2_per_cu_data
*per_cu
,
17591 int size_in_bytes
, bool unsigned_p
)
17593 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
17594 struct type
*int_type
;
17596 /* Helper macro to examine the various builtin types. */
17597 #define TRY_TYPE(F) \
17598 int_type = (unsigned_p \
17599 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17600 : objfile_type (objfile)->builtin_ ## F); \
17601 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17608 TRY_TYPE (long_long
);
17612 gdb_assert_not_reached ("unable to find suitable integer type");
17615 /* Find an integer type the same size as the address size given in the
17616 compilation unit header for PER_CU. UNSIGNED_P controls if the integer
17617 is unsigned or not. */
17619 static struct type
*
17620 dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data
*per_cu
,
17623 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
17624 return dwarf2_per_cu_int_type (per_cu
, addr_size
, unsigned_p
);
17627 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17628 present (which is valid) then compute the default type based on the
17629 compilation units address size. */
17631 static struct type
*
17632 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17634 struct type
*index_type
= die_type (die
, cu
);
17636 /* Dwarf-2 specifications explicitly allows to create subrange types
17637 without specifying a base type.
17638 In that case, the base type must be set to the type of
17639 the lower bound, upper bound or count, in that order, if any of these
17640 three attributes references an object that has a type.
17641 If no base type is found, the Dwarf-2 specifications say that
17642 a signed integer type of size equal to the size of an address should
17644 For the following C code: `extern char gdb_int [];'
17645 GCC produces an empty range DIE.
17646 FIXME: muller/2010-05-28: Possible references to object for low bound,
17647 high bound or count are not yet handled by this code. */
17648 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17649 index_type
= dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17654 /* Read the given DW_AT_subrange DIE. */
17656 static struct type
*
17657 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17659 struct type
*base_type
, *orig_base_type
;
17660 struct type
*range_type
;
17661 struct attribute
*attr
;
17662 struct dynamic_prop low
, high
;
17663 int low_default_is_valid
;
17664 int high_bound_is_count
= 0;
17666 ULONGEST negative_mask
;
17668 orig_base_type
= read_subrange_index_type (die
, cu
);
17670 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17671 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17672 creating the range type, but we use the result of check_typedef
17673 when examining properties of the type. */
17674 base_type
= check_typedef (orig_base_type
);
17676 /* The die_type call above may have already set the type for this DIE. */
17677 range_type
= get_die_type (die
, cu
);
17681 low
.kind
= PROP_CONST
;
17682 high
.kind
= PROP_CONST
;
17683 high
.data
.const_val
= 0;
17685 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17686 omitting DW_AT_lower_bound. */
17687 switch (cu
->language
)
17690 case language_cplus
:
17691 low
.data
.const_val
= 0;
17692 low_default_is_valid
= 1;
17694 case language_fortran
:
17695 low
.data
.const_val
= 1;
17696 low_default_is_valid
= 1;
17699 case language_objc
:
17700 case language_rust
:
17701 low
.data
.const_val
= 0;
17702 low_default_is_valid
= (cu
->header
.version
>= 4);
17706 case language_pascal
:
17707 low
.data
.const_val
= 1;
17708 low_default_is_valid
= (cu
->header
.version
>= 4);
17711 low
.data
.const_val
= 0;
17712 low_default_is_valid
= 0;
17716 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17717 if (attr
!= nullptr)
17718 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17719 else if (!low_default_is_valid
)
17720 complaint (_("Missing DW_AT_lower_bound "
17721 "- DIE at %s [in module %s]"),
17722 sect_offset_str (die
->sect_off
),
17723 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17725 struct attribute
*attr_ub
, *attr_count
;
17726 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17727 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17729 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17730 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17732 /* If bounds are constant do the final calculation here. */
17733 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17734 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17736 high_bound_is_count
= 1;
17740 if (attr_ub
!= NULL
)
17741 complaint (_("Unresolved DW_AT_upper_bound "
17742 "- DIE at %s [in module %s]"),
17743 sect_offset_str (die
->sect_off
),
17744 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17745 if (attr_count
!= NULL
)
17746 complaint (_("Unresolved DW_AT_count "
17747 "- DIE at %s [in module %s]"),
17748 sect_offset_str (die
->sect_off
),
17749 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17754 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17755 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17756 bias
= dwarf2_get_attr_constant_value (bias_attr
, 0);
17758 /* Normally, the DWARF producers are expected to use a signed
17759 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17760 But this is unfortunately not always the case, as witnessed
17761 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17762 is used instead. To work around that ambiguity, we treat
17763 the bounds as signed, and thus sign-extend their values, when
17764 the base type is signed. */
17766 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17767 if (low
.kind
== PROP_CONST
17768 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17769 low
.data
.const_val
|= negative_mask
;
17770 if (high
.kind
== PROP_CONST
17771 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17772 high
.data
.const_val
|= negative_mask
;
17774 /* Check for bit and byte strides. */
17775 struct dynamic_prop byte_stride_prop
;
17776 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17777 if (attr_byte_stride
!= nullptr)
17779 struct type
*prop_type
17780 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17781 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17785 struct dynamic_prop bit_stride_prop
;
17786 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17787 if (attr_bit_stride
!= nullptr)
17789 /* It only makes sense to have either a bit or byte stride. */
17790 if (attr_byte_stride
!= nullptr)
17792 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17793 "- DIE at %s [in module %s]"),
17794 sect_offset_str (die
->sect_off
),
17795 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17796 attr_bit_stride
= nullptr;
17800 struct type
*prop_type
17801 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
17802 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17807 if (attr_byte_stride
!= nullptr
17808 || attr_bit_stride
!= nullptr)
17810 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17811 struct dynamic_prop
*stride
17812 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17815 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17816 &high
, bias
, stride
, byte_stride_p
);
17819 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17821 if (high_bound_is_count
)
17822 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17824 /* Ada expects an empty array on no boundary attributes. */
17825 if (attr
== NULL
&& cu
->language
!= language_ada
)
17826 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17828 name
= dwarf2_name (die
, cu
);
17830 TYPE_NAME (range_type
) = name
;
17832 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17833 if (attr
!= nullptr)
17834 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17836 maybe_set_alignment (cu
, die
, range_type
);
17838 set_die_type (die
, range_type
, cu
);
17840 /* set_die_type should be already done. */
17841 set_descriptive_type (range_type
, die
, cu
);
17846 static struct type
*
17847 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17851 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17853 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17855 /* In Ada, an unspecified type is typically used when the description
17856 of the type is deferred to a different unit. When encountering
17857 such a type, we treat it as a stub, and try to resolve it later on,
17859 if (cu
->language
== language_ada
)
17860 TYPE_STUB (type
) = 1;
17862 return set_die_type (die
, type
, cu
);
17865 /* Read a single die and all its descendents. Set the die's sibling
17866 field to NULL; set other fields in the die correctly, and set all
17867 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17868 location of the info_ptr after reading all of those dies. PARENT
17869 is the parent of the die in question. */
17871 static struct die_info
*
17872 read_die_and_children (const struct die_reader_specs
*reader
,
17873 const gdb_byte
*info_ptr
,
17874 const gdb_byte
**new_info_ptr
,
17875 struct die_info
*parent
)
17877 struct die_info
*die
;
17878 const gdb_byte
*cur_ptr
;
17880 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17883 *new_info_ptr
= cur_ptr
;
17886 store_in_ref_table (die
, reader
->cu
);
17888 if (die
->has_children
)
17889 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17893 *new_info_ptr
= cur_ptr
;
17896 die
->sibling
= NULL
;
17897 die
->parent
= parent
;
17901 /* Read a die, all of its descendents, and all of its siblings; set
17902 all of the fields of all of the dies correctly. Arguments are as
17903 in read_die_and_children. */
17905 static struct die_info
*
17906 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17907 const gdb_byte
*info_ptr
,
17908 const gdb_byte
**new_info_ptr
,
17909 struct die_info
*parent
)
17911 struct die_info
*first_die
, *last_sibling
;
17912 const gdb_byte
*cur_ptr
;
17914 cur_ptr
= info_ptr
;
17915 first_die
= last_sibling
= NULL
;
17919 struct die_info
*die
17920 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17924 *new_info_ptr
= cur_ptr
;
17931 last_sibling
->sibling
= die
;
17933 last_sibling
= die
;
17937 /* Read a die, all of its descendents, and all of its siblings; set
17938 all of the fields of all of the dies correctly. Arguments are as
17939 in read_die_and_children.
17940 This the main entry point for reading a DIE and all its children. */
17942 static struct die_info
*
17943 read_die_and_siblings (const struct die_reader_specs
*reader
,
17944 const gdb_byte
*info_ptr
,
17945 const gdb_byte
**new_info_ptr
,
17946 struct die_info
*parent
)
17948 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17949 new_info_ptr
, parent
);
17951 if (dwarf_die_debug
)
17953 fprintf_unfiltered (gdb_stdlog
,
17954 "Read die from %s@0x%x of %s:\n",
17955 reader
->die_section
->get_name (),
17956 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17957 bfd_get_filename (reader
->abfd
));
17958 dump_die (die
, dwarf_die_debug
);
17964 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17966 The caller is responsible for filling in the extra attributes
17967 and updating (*DIEP)->num_attrs.
17968 Set DIEP to point to a newly allocated die with its information,
17969 except for its child, sibling, and parent fields. */
17971 static const gdb_byte
*
17972 read_full_die_1 (const struct die_reader_specs
*reader
,
17973 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17974 int num_extra_attrs
)
17976 unsigned int abbrev_number
, bytes_read
, i
;
17977 struct abbrev_info
*abbrev
;
17978 struct die_info
*die
;
17979 struct dwarf2_cu
*cu
= reader
->cu
;
17980 bfd
*abfd
= reader
->abfd
;
17982 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17983 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17984 info_ptr
+= bytes_read
;
17985 if (!abbrev_number
)
17991 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17993 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17995 bfd_get_filename (abfd
));
17997 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17998 die
->sect_off
= sect_off
;
17999 die
->tag
= abbrev
->tag
;
18000 die
->abbrev
= abbrev_number
;
18001 die
->has_children
= abbrev
->has_children
;
18003 /* Make the result usable.
18004 The caller needs to update num_attrs after adding the extra
18006 die
->num_attrs
= abbrev
->num_attrs
;
18008 std::vector
<int> indexes_that_need_reprocess
;
18009 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18011 bool need_reprocess
;
18013 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18014 info_ptr
, &need_reprocess
);
18015 if (need_reprocess
)
18016 indexes_that_need_reprocess
.push_back (i
);
18019 struct attribute
*attr
= dwarf2_attr_no_follow (die
, DW_AT_str_offsets_base
);
18020 if (attr
!= nullptr)
18021 cu
->str_offsets_base
= DW_UNSND (attr
);
18023 auto maybe_addr_base
= lookup_addr_base(die
);
18024 if (maybe_addr_base
.has_value ())
18025 cu
->addr_base
= *maybe_addr_base
;
18026 for (int index
: indexes_that_need_reprocess
)
18027 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
18032 /* Read a die and all its attributes.
18033 Set DIEP to point to a newly allocated die with its information,
18034 except for its child, sibling, and parent fields. */
18036 static const gdb_byte
*
18037 read_full_die (const struct die_reader_specs
*reader
,
18038 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18040 const gdb_byte
*result
;
18042 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18044 if (dwarf_die_debug
)
18046 fprintf_unfiltered (gdb_stdlog
,
18047 "Read die from %s@0x%x of %s:\n",
18048 reader
->die_section
->get_name (),
18049 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18050 bfd_get_filename (reader
->abfd
));
18051 dump_die (*diep
, dwarf_die_debug
);
18058 /* Returns nonzero if TAG represents a type that we might generate a partial
18062 is_type_tag_for_partial (int tag
)
18067 /* Some types that would be reasonable to generate partial symbols for,
18068 that we don't at present. */
18069 case DW_TAG_array_type
:
18070 case DW_TAG_file_type
:
18071 case DW_TAG_ptr_to_member_type
:
18072 case DW_TAG_set_type
:
18073 case DW_TAG_string_type
:
18074 case DW_TAG_subroutine_type
:
18076 case DW_TAG_base_type
:
18077 case DW_TAG_class_type
:
18078 case DW_TAG_interface_type
:
18079 case DW_TAG_enumeration_type
:
18080 case DW_TAG_structure_type
:
18081 case DW_TAG_subrange_type
:
18082 case DW_TAG_typedef
:
18083 case DW_TAG_union_type
:
18090 /* Load all DIEs that are interesting for partial symbols into memory. */
18092 static struct partial_die_info
*
18093 load_partial_dies (const struct die_reader_specs
*reader
,
18094 const gdb_byte
*info_ptr
, int building_psymtab
)
18096 struct dwarf2_cu
*cu
= reader
->cu
;
18097 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18098 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18099 unsigned int bytes_read
;
18100 unsigned int load_all
= 0;
18101 int nesting_level
= 1;
18106 gdb_assert (cu
->per_cu
!= NULL
);
18107 if (cu
->per_cu
->load_all_dies
)
18111 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18115 &cu
->comp_unit_obstack
,
18116 hashtab_obstack_allocate
,
18117 dummy_obstack_deallocate
);
18121 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18123 /* A NULL abbrev means the end of a series of children. */
18124 if (abbrev
== NULL
)
18126 if (--nesting_level
== 0)
18129 info_ptr
+= bytes_read
;
18130 last_die
= parent_die
;
18131 parent_die
= parent_die
->die_parent
;
18135 /* Check for template arguments. We never save these; if
18136 they're seen, we just mark the parent, and go on our way. */
18137 if (parent_die
!= NULL
18138 && cu
->language
== language_cplus
18139 && (abbrev
->tag
== DW_TAG_template_type_param
18140 || abbrev
->tag
== DW_TAG_template_value_param
))
18142 parent_die
->has_template_arguments
= 1;
18146 /* We don't need a partial DIE for the template argument. */
18147 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18152 /* We only recurse into c++ subprograms looking for template arguments.
18153 Skip their other children. */
18155 && cu
->language
== language_cplus
18156 && parent_die
!= NULL
18157 && parent_die
->tag
== DW_TAG_subprogram
)
18159 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18163 /* Check whether this DIE is interesting enough to save. Normally
18164 we would not be interested in members here, but there may be
18165 later variables referencing them via DW_AT_specification (for
18166 static members). */
18168 && !is_type_tag_for_partial (abbrev
->tag
)
18169 && abbrev
->tag
!= DW_TAG_constant
18170 && abbrev
->tag
!= DW_TAG_enumerator
18171 && abbrev
->tag
!= DW_TAG_subprogram
18172 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18173 && abbrev
->tag
!= DW_TAG_lexical_block
18174 && abbrev
->tag
!= DW_TAG_variable
18175 && abbrev
->tag
!= DW_TAG_namespace
18176 && abbrev
->tag
!= DW_TAG_module
18177 && abbrev
->tag
!= DW_TAG_member
18178 && abbrev
->tag
!= DW_TAG_imported_unit
18179 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18181 /* Otherwise we skip to the next sibling, if any. */
18182 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18186 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18189 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18191 /* This two-pass algorithm for processing partial symbols has a
18192 high cost in cache pressure. Thus, handle some simple cases
18193 here which cover the majority of C partial symbols. DIEs
18194 which neither have specification tags in them, nor could have
18195 specification tags elsewhere pointing at them, can simply be
18196 processed and discarded.
18198 This segment is also optional; scan_partial_symbols and
18199 add_partial_symbol will handle these DIEs if we chain
18200 them in normally. When compilers which do not emit large
18201 quantities of duplicate debug information are more common,
18202 this code can probably be removed. */
18204 /* Any complete simple types at the top level (pretty much all
18205 of them, for a language without namespaces), can be processed
18207 if (parent_die
== NULL
18208 && pdi
.has_specification
== 0
18209 && pdi
.is_declaration
== 0
18210 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18211 || pdi
.tag
== DW_TAG_base_type
18212 || pdi
.tag
== DW_TAG_subrange_type
))
18214 if (building_psymtab
&& pdi
.name
!= NULL
)
18215 add_psymbol_to_list (pdi
.name
, false,
18216 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18217 psymbol_placement::STATIC
,
18218 0, cu
->language
, objfile
);
18219 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18223 /* The exception for DW_TAG_typedef with has_children above is
18224 a workaround of GCC PR debug/47510. In the case of this complaint
18225 type_name_or_error will error on such types later.
18227 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18228 it could not find the child DIEs referenced later, this is checked
18229 above. In correct DWARF DW_TAG_typedef should have no children. */
18231 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18232 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18233 "- DIE at %s [in module %s]"),
18234 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18236 /* If we're at the second level, and we're an enumerator, and
18237 our parent has no specification (meaning possibly lives in a
18238 namespace elsewhere), then we can add the partial symbol now
18239 instead of queueing it. */
18240 if (pdi
.tag
== DW_TAG_enumerator
18241 && parent_die
!= NULL
18242 && parent_die
->die_parent
== NULL
18243 && parent_die
->tag
== DW_TAG_enumeration_type
18244 && parent_die
->has_specification
== 0)
18246 if (pdi
.name
== NULL
)
18247 complaint (_("malformed enumerator DIE ignored"));
18248 else if (building_psymtab
)
18249 add_psymbol_to_list (pdi
.name
, false,
18250 VAR_DOMAIN
, LOC_CONST
, -1,
18251 cu
->language
== language_cplus
18252 ? psymbol_placement::GLOBAL
18253 : psymbol_placement::STATIC
,
18254 0, cu
->language
, objfile
);
18256 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18260 struct partial_die_info
*part_die
18261 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18263 /* We'll save this DIE so link it in. */
18264 part_die
->die_parent
= parent_die
;
18265 part_die
->die_sibling
= NULL
;
18266 part_die
->die_child
= NULL
;
18268 if (last_die
&& last_die
== parent_die
)
18269 last_die
->die_child
= part_die
;
18271 last_die
->die_sibling
= part_die
;
18273 last_die
= part_die
;
18275 if (first_die
== NULL
)
18276 first_die
= part_die
;
18278 /* Maybe add the DIE to the hash table. Not all DIEs that we
18279 find interesting need to be in the hash table, because we
18280 also have the parent/sibling/child chains; only those that we
18281 might refer to by offset later during partial symbol reading.
18283 For now this means things that might have be the target of a
18284 DW_AT_specification, DW_AT_abstract_origin, or
18285 DW_AT_extension. DW_AT_extension will refer only to
18286 namespaces; DW_AT_abstract_origin refers to functions (and
18287 many things under the function DIE, but we do not recurse
18288 into function DIEs during partial symbol reading) and
18289 possibly variables as well; DW_AT_specification refers to
18290 declarations. Declarations ought to have the DW_AT_declaration
18291 flag. It happens that GCC forgets to put it in sometimes, but
18292 only for functions, not for types.
18294 Adding more things than necessary to the hash table is harmless
18295 except for the performance cost. Adding too few will result in
18296 wasted time in find_partial_die, when we reread the compilation
18297 unit with load_all_dies set. */
18300 || abbrev
->tag
== DW_TAG_constant
18301 || abbrev
->tag
== DW_TAG_subprogram
18302 || abbrev
->tag
== DW_TAG_variable
18303 || abbrev
->tag
== DW_TAG_namespace
18304 || part_die
->is_declaration
)
18308 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18309 to_underlying (part_die
->sect_off
),
18314 /* For some DIEs we want to follow their children (if any). For C
18315 we have no reason to follow the children of structures; for other
18316 languages we have to, so that we can get at method physnames
18317 to infer fully qualified class names, for DW_AT_specification,
18318 and for C++ template arguments. For C++, we also look one level
18319 inside functions to find template arguments (if the name of the
18320 function does not already contain the template arguments).
18322 For Ada and Fortran, we need to scan the children of subprograms
18323 and lexical blocks as well because these languages allow the
18324 definition of nested entities that could be interesting for the
18325 debugger, such as nested subprograms for instance. */
18326 if (last_die
->has_children
18328 || last_die
->tag
== DW_TAG_namespace
18329 || last_die
->tag
== DW_TAG_module
18330 || last_die
->tag
== DW_TAG_enumeration_type
18331 || (cu
->language
== language_cplus
18332 && last_die
->tag
== DW_TAG_subprogram
18333 && (last_die
->name
== NULL
18334 || strchr (last_die
->name
, '<') == NULL
))
18335 || (cu
->language
!= language_c
18336 && (last_die
->tag
== DW_TAG_class_type
18337 || last_die
->tag
== DW_TAG_interface_type
18338 || last_die
->tag
== DW_TAG_structure_type
18339 || last_die
->tag
== DW_TAG_union_type
))
18340 || ((cu
->language
== language_ada
18341 || cu
->language
== language_fortran
)
18342 && (last_die
->tag
== DW_TAG_subprogram
18343 || last_die
->tag
== DW_TAG_lexical_block
))))
18346 parent_die
= last_die
;
18350 /* Otherwise we skip to the next sibling, if any. */
18351 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18353 /* Back to the top, do it again. */
18357 partial_die_info::partial_die_info (sect_offset sect_off_
,
18358 struct abbrev_info
*abbrev
)
18359 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18363 /* Read a minimal amount of information into the minimal die structure.
18364 INFO_PTR should point just after the initial uleb128 of a DIE. */
18367 partial_die_info::read (const struct die_reader_specs
*reader
,
18368 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18370 struct dwarf2_cu
*cu
= reader
->cu
;
18371 struct dwarf2_per_objfile
*dwarf2_per_objfile
18372 = cu
->per_cu
->dwarf2_per_objfile
;
18374 int has_low_pc_attr
= 0;
18375 int has_high_pc_attr
= 0;
18376 int high_pc_relative
= 0;
18378 std::vector
<struct attribute
> attr_vec (abbrev
.num_attrs
);
18379 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18381 bool need_reprocess
;
18382 info_ptr
= read_attribute (reader
, &attr_vec
[i
], &abbrev
.attrs
[i
],
18383 info_ptr
, &need_reprocess
);
18384 /* String and address offsets that need to do the reprocessing have
18385 already been read at this point, so there is no need to wait until
18386 the loop terminates to do the reprocessing. */
18387 if (need_reprocess
)
18388 read_attribute_reprocess (reader
, &attr_vec
[i
]);
18389 attribute
&attr
= attr_vec
[i
];
18390 /* Store the data if it is of an attribute we want to keep in a
18391 partial symbol table. */
18397 case DW_TAG_compile_unit
:
18398 case DW_TAG_partial_unit
:
18399 case DW_TAG_type_unit
:
18400 /* Compilation units have a DW_AT_name that is a filename, not
18401 a source language identifier. */
18402 case DW_TAG_enumeration_type
:
18403 case DW_TAG_enumerator
:
18404 /* These tags always have simple identifiers already; no need
18405 to canonicalize them. */
18406 name
= DW_STRING (&attr
);
18410 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18413 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18414 &objfile
->per_bfd
->storage_obstack
);
18419 case DW_AT_linkage_name
:
18420 case DW_AT_MIPS_linkage_name
:
18421 /* Note that both forms of linkage name might appear. We
18422 assume they will be the same, and we only store the last
18424 linkage_name
= DW_STRING (&attr
);
18427 has_low_pc_attr
= 1;
18428 lowpc
= attr
.value_as_address ();
18430 case DW_AT_high_pc
:
18431 has_high_pc_attr
= 1;
18432 highpc
= attr
.value_as_address ();
18433 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18434 high_pc_relative
= 1;
18436 case DW_AT_location
:
18437 /* Support the .debug_loc offsets. */
18438 if (attr
.form_is_block ())
18440 d
.locdesc
= DW_BLOCK (&attr
);
18442 else if (attr
.form_is_section_offset ())
18444 dwarf2_complex_location_expr_complaint ();
18448 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18449 "partial symbol information");
18452 case DW_AT_external
:
18453 is_external
= DW_UNSND (&attr
);
18455 case DW_AT_declaration
:
18456 is_declaration
= DW_UNSND (&attr
);
18461 case DW_AT_abstract_origin
:
18462 case DW_AT_specification
:
18463 case DW_AT_extension
:
18464 has_specification
= 1;
18465 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18466 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18467 || cu
->per_cu
->is_dwz
);
18469 case DW_AT_sibling
:
18470 /* Ignore absolute siblings, they might point outside of
18471 the current compile unit. */
18472 if (attr
.form
== DW_FORM_ref_addr
)
18473 complaint (_("ignoring absolute DW_AT_sibling"));
18476 const gdb_byte
*buffer
= reader
->buffer
;
18477 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18478 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18480 if (sibling_ptr
< info_ptr
)
18481 complaint (_("DW_AT_sibling points backwards"));
18482 else if (sibling_ptr
> reader
->buffer_end
)
18483 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18485 sibling
= sibling_ptr
;
18488 case DW_AT_byte_size
:
18491 case DW_AT_const_value
:
18492 has_const_value
= 1;
18494 case DW_AT_calling_convention
:
18495 /* DWARF doesn't provide a way to identify a program's source-level
18496 entry point. DW_AT_calling_convention attributes are only meant
18497 to describe functions' calling conventions.
18499 However, because it's a necessary piece of information in
18500 Fortran, and before DWARF 4 DW_CC_program was the only
18501 piece of debugging information whose definition refers to
18502 a 'main program' at all, several compilers marked Fortran
18503 main programs with DW_CC_program --- even when those
18504 functions use the standard calling conventions.
18506 Although DWARF now specifies a way to provide this
18507 information, we support this practice for backward
18509 if (DW_UNSND (&attr
) == DW_CC_program
18510 && cu
->language
== language_fortran
)
18511 main_subprogram
= 1;
18514 if (DW_UNSND (&attr
) == DW_INL_inlined
18515 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18516 may_be_inlined
= 1;
18520 if (tag
== DW_TAG_imported_unit
)
18522 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18523 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18524 || cu
->per_cu
->is_dwz
);
18528 case DW_AT_main_subprogram
:
18529 main_subprogram
= DW_UNSND (&attr
);
18534 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18535 but that requires a full DIE, so instead we just
18537 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18538 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18539 + (need_ranges_base
18543 /* Value of the DW_AT_ranges attribute is the offset in the
18544 .debug_ranges section. */
18545 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18556 /* For Ada, if both the name and the linkage name appear, we prefer
18557 the latter. This lets "catch exception" work better, regardless
18558 of the order in which the name and linkage name were emitted.
18559 Really, though, this is just a workaround for the fact that gdb
18560 doesn't store both the name and the linkage name. */
18561 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18562 name
= linkage_name
;
18564 if (high_pc_relative
)
18567 if (has_low_pc_attr
&& has_high_pc_attr
)
18569 /* When using the GNU linker, .gnu.linkonce. sections are used to
18570 eliminate duplicate copies of functions and vtables and such.
18571 The linker will arbitrarily choose one and discard the others.
18572 The AT_*_pc values for such functions refer to local labels in
18573 these sections. If the section from that file was discarded, the
18574 labels are not in the output, so the relocs get a value of 0.
18575 If this is a discarded function, mark the pc bounds as invalid,
18576 so that GDB will ignore it. */
18577 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18579 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18580 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18582 complaint (_("DW_AT_low_pc %s is zero "
18583 "for DIE at %s [in module %s]"),
18584 paddress (gdbarch
, lowpc
),
18585 sect_offset_str (sect_off
),
18586 objfile_name (objfile
));
18588 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18589 else if (lowpc
>= highpc
)
18591 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18592 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18594 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18595 "for DIE at %s [in module %s]"),
18596 paddress (gdbarch
, lowpc
),
18597 paddress (gdbarch
, highpc
),
18598 sect_offset_str (sect_off
),
18599 objfile_name (objfile
));
18608 /* Find a cached partial DIE at OFFSET in CU. */
18610 struct partial_die_info
*
18611 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18613 struct partial_die_info
*lookup_die
= NULL
;
18614 struct partial_die_info
part_die (sect_off
);
18616 lookup_die
= ((struct partial_die_info
*)
18617 htab_find_with_hash (partial_dies
, &part_die
,
18618 to_underlying (sect_off
)));
18623 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18624 except in the case of .debug_types DIEs which do not reference
18625 outside their CU (they do however referencing other types via
18626 DW_FORM_ref_sig8). */
18628 static const struct cu_partial_die_info
18629 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18631 struct dwarf2_per_objfile
*dwarf2_per_objfile
18632 = cu
->per_cu
->dwarf2_per_objfile
;
18633 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18634 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18635 struct partial_die_info
*pd
= NULL
;
18637 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18638 && offset_in_cu_p (&cu
->header
, sect_off
))
18640 pd
= cu
->find_partial_die (sect_off
);
18643 /* We missed recording what we needed.
18644 Load all dies and try again. */
18645 per_cu
= cu
->per_cu
;
18649 /* TUs don't reference other CUs/TUs (except via type signatures). */
18650 if (cu
->per_cu
->is_debug_types
)
18652 error (_("Dwarf Error: Type Unit at offset %s contains"
18653 " external reference to offset %s [in module %s].\n"),
18654 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18655 bfd_get_filename (objfile
->obfd
));
18657 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18658 dwarf2_per_objfile
);
18660 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18661 load_partial_comp_unit (per_cu
);
18663 per_cu
->cu
->last_used
= 0;
18664 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18667 /* If we didn't find it, and not all dies have been loaded,
18668 load them all and try again. */
18670 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18672 per_cu
->load_all_dies
= 1;
18674 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18675 THIS_CU->cu may already be in use. So we can't just free it and
18676 replace its DIEs with the ones we read in. Instead, we leave those
18677 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18678 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18680 load_partial_comp_unit (per_cu
);
18682 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18686 internal_error (__FILE__
, __LINE__
,
18687 _("could not find partial DIE %s "
18688 "in cache [from module %s]\n"),
18689 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18690 return { per_cu
->cu
, pd
};
18693 /* See if we can figure out if the class lives in a namespace. We do
18694 this by looking for a member function; its demangled name will
18695 contain namespace info, if there is any. */
18698 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18699 struct dwarf2_cu
*cu
)
18701 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18702 what template types look like, because the demangler
18703 frequently doesn't give the same name as the debug info. We
18704 could fix this by only using the demangled name to get the
18705 prefix (but see comment in read_structure_type). */
18707 struct partial_die_info
*real_pdi
;
18708 struct partial_die_info
*child_pdi
;
18710 /* If this DIE (this DIE's specification, if any) has a parent, then
18711 we should not do this. We'll prepend the parent's fully qualified
18712 name when we create the partial symbol. */
18714 real_pdi
= struct_pdi
;
18715 while (real_pdi
->has_specification
)
18717 auto res
= find_partial_die (real_pdi
->spec_offset
,
18718 real_pdi
->spec_is_dwz
, cu
);
18719 real_pdi
= res
.pdi
;
18723 if (real_pdi
->die_parent
!= NULL
)
18726 for (child_pdi
= struct_pdi
->die_child
;
18728 child_pdi
= child_pdi
->die_sibling
)
18730 if (child_pdi
->tag
== DW_TAG_subprogram
18731 && child_pdi
->linkage_name
!= NULL
)
18733 gdb::unique_xmalloc_ptr
<char> actual_class_name
18734 (language_class_name_from_physname (cu
->language_defn
,
18735 child_pdi
->linkage_name
));
18736 if (actual_class_name
!= NULL
)
18738 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18740 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
18741 actual_class_name
.get ());
18749 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18751 /* Once we've fixed up a die, there's no point in doing so again.
18752 This also avoids a memory leak if we were to call
18753 guess_partial_die_structure_name multiple times. */
18757 /* If we found a reference attribute and the DIE has no name, try
18758 to find a name in the referred to DIE. */
18760 if (name
== NULL
&& has_specification
)
18762 struct partial_die_info
*spec_die
;
18764 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18765 spec_die
= res
.pdi
;
18768 spec_die
->fixup (cu
);
18770 if (spec_die
->name
)
18772 name
= spec_die
->name
;
18774 /* Copy DW_AT_external attribute if it is set. */
18775 if (spec_die
->is_external
)
18776 is_external
= spec_die
->is_external
;
18780 /* Set default names for some unnamed DIEs. */
18782 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18783 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18785 /* If there is no parent die to provide a namespace, and there are
18786 children, see if we can determine the namespace from their linkage
18788 if (cu
->language
== language_cplus
18789 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18790 && die_parent
== NULL
18792 && (tag
== DW_TAG_class_type
18793 || tag
== DW_TAG_structure_type
18794 || tag
== DW_TAG_union_type
))
18795 guess_partial_die_structure_name (this, cu
);
18797 /* GCC might emit a nameless struct or union that has a linkage
18798 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18800 && (tag
== DW_TAG_class_type
18801 || tag
== DW_TAG_interface_type
18802 || tag
== DW_TAG_structure_type
18803 || tag
== DW_TAG_union_type
)
18804 && linkage_name
!= NULL
)
18806 gdb::unique_xmalloc_ptr
<char> demangled
18807 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18808 if (demangled
!= nullptr)
18812 /* Strip any leading namespaces/classes, keep only the base name.
18813 DW_AT_name for named DIEs does not contain the prefixes. */
18814 base
= strrchr (demangled
.get (), ':');
18815 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18818 base
= demangled
.get ();
18820 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18821 name
= obstack_strdup (&objfile
->per_bfd
->storage_obstack
, base
);
18828 /* Process the attributes that had to be skipped in the first round. These
18829 attributes are the ones that need str_offsets_base or addr_base attributes.
18830 They could not have been processed in the first round, because at the time
18831 the values of str_offsets_base or addr_base may not have been known. */
18832 void read_attribute_reprocess (const struct die_reader_specs
*reader
,
18833 struct attribute
*attr
)
18835 struct dwarf2_cu
*cu
= reader
->cu
;
18836 switch (attr
->form
)
18838 case DW_FORM_addrx
:
18839 case DW_FORM_GNU_addr_index
:
18840 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18843 case DW_FORM_strx1
:
18844 case DW_FORM_strx2
:
18845 case DW_FORM_strx3
:
18846 case DW_FORM_strx4
:
18847 case DW_FORM_GNU_str_index
:
18849 unsigned int str_index
= DW_UNSND (attr
);
18850 if (reader
->dwo_file
!= NULL
)
18852 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18853 DW_STRING_IS_CANONICAL (attr
) = 0;
18857 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18858 DW_STRING_IS_CANONICAL (attr
) = 0;
18863 gdb_assert_not_reached (_("Unexpected DWARF form."));
18867 /* Read an attribute value described by an attribute form. */
18869 static const gdb_byte
*
18870 read_attribute_value (const struct die_reader_specs
*reader
,
18871 struct attribute
*attr
, unsigned form
,
18872 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18873 bool *need_reprocess
)
18875 struct dwarf2_cu
*cu
= reader
->cu
;
18876 struct dwarf2_per_objfile
*dwarf2_per_objfile
18877 = cu
->per_cu
->dwarf2_per_objfile
;
18878 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18879 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18880 bfd
*abfd
= reader
->abfd
;
18881 struct comp_unit_head
*cu_header
= &cu
->header
;
18882 unsigned int bytes_read
;
18883 struct dwarf_block
*blk
;
18884 *need_reprocess
= false;
18886 attr
->form
= (enum dwarf_form
) form
;
18889 case DW_FORM_ref_addr
:
18890 if (cu
->header
.version
== 2)
18891 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18893 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18894 &cu
->header
, &bytes_read
);
18895 info_ptr
+= bytes_read
;
18897 case DW_FORM_GNU_ref_alt
:
18898 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18899 info_ptr
+= bytes_read
;
18902 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18903 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18904 info_ptr
+= bytes_read
;
18906 case DW_FORM_block2
:
18907 blk
= dwarf_alloc_block (cu
);
18908 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18910 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18911 info_ptr
+= blk
->size
;
18912 DW_BLOCK (attr
) = blk
;
18914 case DW_FORM_block4
:
18915 blk
= dwarf_alloc_block (cu
);
18916 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18918 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18919 info_ptr
+= blk
->size
;
18920 DW_BLOCK (attr
) = blk
;
18922 case DW_FORM_data2
:
18923 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18926 case DW_FORM_data4
:
18927 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18930 case DW_FORM_data8
:
18931 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18934 case DW_FORM_data16
:
18935 blk
= dwarf_alloc_block (cu
);
18937 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18939 DW_BLOCK (attr
) = blk
;
18941 case DW_FORM_sec_offset
:
18942 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18943 info_ptr
+= bytes_read
;
18945 case DW_FORM_string
:
18946 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18947 DW_STRING_IS_CANONICAL (attr
) = 0;
18948 info_ptr
+= bytes_read
;
18951 if (!cu
->per_cu
->is_dwz
)
18953 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18954 abfd
, info_ptr
, cu_header
,
18956 DW_STRING_IS_CANONICAL (attr
) = 0;
18957 info_ptr
+= bytes_read
;
18961 case DW_FORM_line_strp
:
18962 if (!cu
->per_cu
->is_dwz
)
18964 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18966 cu_header
, &bytes_read
);
18967 DW_STRING_IS_CANONICAL (attr
) = 0;
18968 info_ptr
+= bytes_read
;
18972 case DW_FORM_GNU_strp_alt
:
18974 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18975 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18978 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18980 DW_STRING_IS_CANONICAL (attr
) = 0;
18981 info_ptr
+= bytes_read
;
18984 case DW_FORM_exprloc
:
18985 case DW_FORM_block
:
18986 blk
= dwarf_alloc_block (cu
);
18987 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18988 info_ptr
+= bytes_read
;
18989 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18990 info_ptr
+= blk
->size
;
18991 DW_BLOCK (attr
) = blk
;
18993 case DW_FORM_block1
:
18994 blk
= dwarf_alloc_block (cu
);
18995 blk
->size
= read_1_byte (abfd
, info_ptr
);
18997 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18998 info_ptr
+= blk
->size
;
18999 DW_BLOCK (attr
) = blk
;
19001 case DW_FORM_data1
:
19002 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19006 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19009 case DW_FORM_flag_present
:
19010 DW_UNSND (attr
) = 1;
19012 case DW_FORM_sdata
:
19013 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19014 info_ptr
+= bytes_read
;
19016 case DW_FORM_udata
:
19017 case DW_FORM_rnglistx
:
19018 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19019 info_ptr
+= bytes_read
;
19022 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19023 + read_1_byte (abfd
, info_ptr
));
19027 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19028 + read_2_bytes (abfd
, info_ptr
));
19032 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19033 + read_4_bytes (abfd
, info_ptr
));
19037 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19038 + read_8_bytes (abfd
, info_ptr
));
19041 case DW_FORM_ref_sig8
:
19042 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19045 case DW_FORM_ref_udata
:
19046 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19047 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19048 info_ptr
+= bytes_read
;
19050 case DW_FORM_indirect
:
19051 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19052 info_ptr
+= bytes_read
;
19053 if (form
== DW_FORM_implicit_const
)
19055 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19056 info_ptr
+= bytes_read
;
19058 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19059 info_ptr
, need_reprocess
);
19061 case DW_FORM_implicit_const
:
19062 DW_SND (attr
) = implicit_const
;
19064 case DW_FORM_addrx
:
19065 case DW_FORM_GNU_addr_index
:
19066 *need_reprocess
= true;
19067 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19068 info_ptr
+= bytes_read
;
19071 case DW_FORM_strx1
:
19072 case DW_FORM_strx2
:
19073 case DW_FORM_strx3
:
19074 case DW_FORM_strx4
:
19075 case DW_FORM_GNU_str_index
:
19077 ULONGEST str_index
;
19078 if (form
== DW_FORM_strx1
)
19080 str_index
= read_1_byte (abfd
, info_ptr
);
19083 else if (form
== DW_FORM_strx2
)
19085 str_index
= read_2_bytes (abfd
, info_ptr
);
19088 else if (form
== DW_FORM_strx3
)
19090 str_index
= read_3_bytes (abfd
, info_ptr
);
19093 else if (form
== DW_FORM_strx4
)
19095 str_index
= read_4_bytes (abfd
, info_ptr
);
19100 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19101 info_ptr
+= bytes_read
;
19103 *need_reprocess
= true;
19104 DW_UNSND (attr
) = str_index
;
19108 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19109 dwarf_form_name (form
),
19110 bfd_get_filename (abfd
));
19114 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19115 attr
->form
= DW_FORM_GNU_ref_alt
;
19117 /* We have seen instances where the compiler tried to emit a byte
19118 size attribute of -1 which ended up being encoded as an unsigned
19119 0xffffffff. Although 0xffffffff is technically a valid size value,
19120 an object of this size seems pretty unlikely so we can relatively
19121 safely treat these cases as if the size attribute was invalid and
19122 treat them as zero by default. */
19123 if (attr
->name
== DW_AT_byte_size
19124 && form
== DW_FORM_data4
19125 && DW_UNSND (attr
) >= 0xffffffff)
19128 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19129 hex_string (DW_UNSND (attr
)));
19130 DW_UNSND (attr
) = 0;
19136 /* Read an attribute described by an abbreviated attribute. */
19138 static const gdb_byte
*
19139 read_attribute (const struct die_reader_specs
*reader
,
19140 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19141 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19143 attr
->name
= abbrev
->name
;
19144 return read_attribute_value (reader
, attr
, abbrev
->form
,
19145 abbrev
->implicit_const
, info_ptr
,
19150 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19151 unsigned int *bytes_read
)
19153 struct comp_unit_head
*cu_header
= &cu
->header
;
19154 CORE_ADDR retval
= 0;
19156 if (cu_header
->signed_addr_p
)
19158 switch (cu_header
->addr_size
)
19161 retval
= bfd_get_signed_16 (abfd
, buf
);
19164 retval
= bfd_get_signed_32 (abfd
, buf
);
19167 retval
= bfd_get_signed_64 (abfd
, buf
);
19170 internal_error (__FILE__
, __LINE__
,
19171 _("read_address: bad switch, signed [in module %s]"),
19172 bfd_get_filename (abfd
));
19177 switch (cu_header
->addr_size
)
19180 retval
= bfd_get_16 (abfd
, buf
);
19183 retval
= bfd_get_32 (abfd
, buf
);
19186 retval
= bfd_get_64 (abfd
, buf
);
19189 internal_error (__FILE__
, __LINE__
,
19190 _("read_address: bad switch, "
19191 "unsigned [in module %s]"),
19192 bfd_get_filename (abfd
));
19196 *bytes_read
= cu_header
->addr_size
;
19200 /* Read the initial length from a section. The (draft) DWARF 3
19201 specification allows the initial length to take up either 4 bytes
19202 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19203 bytes describe the length and all offsets will be 8 bytes in length
19206 An older, non-standard 64-bit format is also handled by this
19207 function. The older format in question stores the initial length
19208 as an 8-byte quantity without an escape value. Lengths greater
19209 than 2^32 aren't very common which means that the initial 4 bytes
19210 is almost always zero. Since a length value of zero doesn't make
19211 sense for the 32-bit format, this initial zero can be considered to
19212 be an escape value which indicates the presence of the older 64-bit
19213 format. As written, the code can't detect (old format) lengths
19214 greater than 4GB. If it becomes necessary to handle lengths
19215 somewhat larger than 4GB, we could allow other small values (such
19216 as the non-sensical values of 1, 2, and 3) to also be used as
19217 escape values indicating the presence of the old format.
19219 The value returned via bytes_read should be used to increment the
19220 relevant pointer after calling read_initial_length().
19222 [ Note: read_initial_length() and read_offset() are based on the
19223 document entitled "DWARF Debugging Information Format", revision
19224 3, draft 8, dated November 19, 2001. This document was obtained
19227 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19229 This document is only a draft and is subject to change. (So beware.)
19231 Details regarding the older, non-standard 64-bit format were
19232 determined empirically by examining 64-bit ELF files produced by
19233 the SGI toolchain on an IRIX 6.5 machine.
19235 - Kevin, July 16, 2002
19239 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19241 LONGEST length
= bfd_get_32 (abfd
, buf
);
19243 if (length
== 0xffffffff)
19245 length
= bfd_get_64 (abfd
, buf
+ 4);
19248 else if (length
== 0)
19250 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19251 length
= bfd_get_64 (abfd
, buf
);
19262 /* Cover function for read_initial_length.
19263 Returns the length of the object at BUF, and stores the size of the
19264 initial length in *BYTES_READ and stores the size that offsets will be in
19266 If the initial length size is not equivalent to that specified in
19267 CU_HEADER then issue a complaint.
19268 This is useful when reading non-comp-unit headers. */
19271 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19272 const struct comp_unit_head
*cu_header
,
19273 unsigned int *bytes_read
,
19274 unsigned int *offset_size
)
19276 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19278 gdb_assert (cu_header
->initial_length_size
== 4
19279 || cu_header
->initial_length_size
== 8
19280 || cu_header
->initial_length_size
== 12);
19282 if (cu_header
->initial_length_size
!= *bytes_read
)
19283 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19285 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19289 /* Read an offset from the data stream. The size of the offset is
19290 given by cu_header->offset_size. */
19293 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19294 const struct comp_unit_head
*cu_header
,
19295 unsigned int *bytes_read
)
19297 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19299 *bytes_read
= cu_header
->offset_size
;
19303 /* Read an offset from the data stream. */
19306 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19308 LONGEST retval
= 0;
19310 switch (offset_size
)
19313 retval
= bfd_get_32 (abfd
, buf
);
19316 retval
= bfd_get_64 (abfd
, buf
);
19319 internal_error (__FILE__
, __LINE__
,
19320 _("read_offset_1: bad switch [in module %s]"),
19321 bfd_get_filename (abfd
));
19327 static const gdb_byte
*
19328 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19330 /* If the size of a host char is 8 bits, we can return a pointer
19331 to the buffer, otherwise we have to copy the data to a buffer
19332 allocated on the temporary obstack. */
19333 gdb_assert (HOST_CHAR_BIT
== 8);
19337 static const char *
19338 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19339 unsigned int *bytes_read_ptr
)
19341 /* If the size of a host char is 8 bits, we can return a pointer
19342 to the string, otherwise we have to copy the string to a buffer
19343 allocated on the temporary obstack. */
19344 gdb_assert (HOST_CHAR_BIT
== 8);
19347 *bytes_read_ptr
= 1;
19350 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19351 return (const char *) buf
;
19354 /* Return pointer to string at section SECT offset STR_OFFSET with error
19355 reporting strings FORM_NAME and SECT_NAME. */
19357 static const char *
19358 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19359 bfd
*abfd
, LONGEST str_offset
,
19360 struct dwarf2_section_info
*sect
,
19361 const char *form_name
,
19362 const char *sect_name
)
19364 sect
->read (objfile
);
19365 if (sect
->buffer
== NULL
)
19366 error (_("%s used without %s section [in module %s]"),
19367 form_name
, sect_name
, bfd_get_filename (abfd
));
19368 if (str_offset
>= sect
->size
)
19369 error (_("%s pointing outside of %s section [in module %s]"),
19370 form_name
, sect_name
, bfd_get_filename (abfd
));
19371 gdb_assert (HOST_CHAR_BIT
== 8);
19372 if (sect
->buffer
[str_offset
] == '\0')
19374 return (const char *) (sect
->buffer
+ str_offset
);
19377 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19379 static const char *
19380 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19381 bfd
*abfd
, LONGEST str_offset
)
19383 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19385 &dwarf2_per_objfile
->str
,
19386 "DW_FORM_strp", ".debug_str");
19389 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19391 static const char *
19392 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19393 bfd
*abfd
, LONGEST str_offset
)
19395 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19397 &dwarf2_per_objfile
->line_str
,
19398 "DW_FORM_line_strp",
19399 ".debug_line_str");
19402 /* Read a string at offset STR_OFFSET in the .debug_str section from
19403 the .dwz file DWZ. Throw an error if the offset is too large. If
19404 the string consists of a single NUL byte, return NULL; otherwise
19405 return a pointer to the string. */
19407 static const char *
19408 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19409 LONGEST str_offset
)
19411 dwz
->str
.read (objfile
);
19413 if (dwz
->str
.buffer
== NULL
)
19414 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19415 "section [in module %s]"),
19416 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19417 if (str_offset
>= dwz
->str
.size
)
19418 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19419 ".debug_str section [in module %s]"),
19420 bfd_get_filename (dwz
->dwz_bfd
.get ()));
19421 gdb_assert (HOST_CHAR_BIT
== 8);
19422 if (dwz
->str
.buffer
[str_offset
] == '\0')
19424 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19427 /* Return pointer to string at .debug_str offset as read from BUF.
19428 BUF is assumed to be in a compilation unit described by CU_HEADER.
19429 Return *BYTES_READ_PTR count of bytes read from BUF. */
19431 static const char *
19432 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19433 const gdb_byte
*buf
,
19434 const struct comp_unit_head
*cu_header
,
19435 unsigned int *bytes_read_ptr
)
19437 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19439 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19442 /* Return pointer to string at .debug_line_str offset as read from BUF.
19443 BUF is assumed to be in a compilation unit described by CU_HEADER.
19444 Return *BYTES_READ_PTR count of bytes read from BUF. */
19446 static const char *
19447 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19448 bfd
*abfd
, const gdb_byte
*buf
,
19449 const struct comp_unit_head
*cu_header
,
19450 unsigned int *bytes_read_ptr
)
19452 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19454 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19458 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19459 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19460 ADDR_SIZE is the size of addresses from the CU header. */
19463 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19464 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19467 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19468 bfd
*abfd
= objfile
->obfd
;
19469 const gdb_byte
*info_ptr
;
19470 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19472 dwarf2_per_objfile
->addr
.read (objfile
);
19473 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19474 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19475 objfile_name (objfile
));
19476 if (addr_base_or_zero
+ addr_index
* addr_size
19477 >= dwarf2_per_objfile
->addr
.size
)
19478 error (_("DW_FORM_addr_index pointing outside of "
19479 ".debug_addr section [in module %s]"),
19480 objfile_name (objfile
));
19481 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19482 + addr_base_or_zero
+ addr_index
* addr_size
);
19483 if (addr_size
== 4)
19484 return bfd_get_32 (abfd
, info_ptr
);
19486 return bfd_get_64 (abfd
, info_ptr
);
19489 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19492 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19494 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19495 cu
->addr_base
, cu
->header
.addr_size
);
19498 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19501 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19502 unsigned int *bytes_read
)
19504 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19505 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19507 return read_addr_index (cu
, addr_index
);
19510 /* Given an index in .debug_addr, fetch the value.
19511 NOTE: This can be called during dwarf expression evaluation,
19512 long after the debug information has been read, and thus per_cu->cu
19513 may no longer exist. */
19516 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19517 unsigned int addr_index
)
19519 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19520 struct dwarf2_cu
*cu
= per_cu
->cu
;
19521 gdb::optional
<ULONGEST
> addr_base
;
19524 /* We need addr_base and addr_size.
19525 If we don't have PER_CU->cu, we have to get it.
19526 Nasty, but the alternative is storing the needed info in PER_CU,
19527 which at this point doesn't seem justified: it's not clear how frequently
19528 it would get used and it would increase the size of every PER_CU.
19529 Entry points like dwarf2_per_cu_addr_size do a similar thing
19530 so we're not in uncharted territory here.
19531 Alas we need to be a bit more complicated as addr_base is contained
19534 We don't need to read the entire CU(/TU).
19535 We just need the header and top level die.
19537 IWBN to use the aging mechanism to let us lazily later discard the CU.
19538 For now we skip this optimization. */
19542 addr_base
= cu
->addr_base
;
19543 addr_size
= cu
->header
.addr_size
;
19547 cutu_reader
reader (per_cu
, NULL
, 0, 0, false);
19548 addr_base
= reader
.cu
->addr_base
;
19549 addr_size
= reader
.cu
->header
.addr_size
;
19552 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19556 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19557 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19560 static const char *
19561 read_str_index (struct dwarf2_cu
*cu
,
19562 struct dwarf2_section_info
*str_section
,
19563 struct dwarf2_section_info
*str_offsets_section
,
19564 ULONGEST str_offsets_base
, ULONGEST str_index
)
19566 struct dwarf2_per_objfile
*dwarf2_per_objfile
19567 = cu
->per_cu
->dwarf2_per_objfile
;
19568 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19569 const char *objf_name
= objfile_name (objfile
);
19570 bfd
*abfd
= objfile
->obfd
;
19571 const gdb_byte
*info_ptr
;
19572 ULONGEST str_offset
;
19573 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19575 str_section
->read (objfile
);
19576 str_offsets_section
->read (objfile
);
19577 if (str_section
->buffer
== NULL
)
19578 error (_("%s used without %s section"
19579 " in CU at offset %s [in module %s]"),
19580 form_name
, str_section
->get_name (),
19581 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19582 if (str_offsets_section
->buffer
== NULL
)
19583 error (_("%s used without %s section"
19584 " in CU at offset %s [in module %s]"),
19585 form_name
, str_section
->get_name (),
19586 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19587 info_ptr
= (str_offsets_section
->buffer
19589 + str_index
* cu
->header
.offset_size
);
19590 if (cu
->header
.offset_size
== 4)
19591 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19593 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19594 if (str_offset
>= str_section
->size
)
19595 error (_("Offset from %s pointing outside of"
19596 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19597 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19598 return (const char *) (str_section
->buffer
+ str_offset
);
19601 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19603 static const char *
19604 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19606 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19607 ? reader
->cu
->header
.addr_size
: 0;
19608 return read_str_index (reader
->cu
,
19609 &reader
->dwo_file
->sections
.str
,
19610 &reader
->dwo_file
->sections
.str_offsets
,
19611 str_offsets_base
, str_index
);
19614 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19616 static const char *
19617 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19619 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19620 const char *objf_name
= objfile_name (objfile
);
19621 static const char form_name
[] = "DW_FORM_GNU_str_index";
19622 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19624 if (!cu
->str_offsets_base
.has_value ())
19625 error (_("%s used in Fission stub without %s"
19626 " in CU at offset 0x%lx [in module %s]"),
19627 form_name
, str_offsets_attr_name
,
19628 (long) cu
->header
.offset_size
, objf_name
);
19630 return read_str_index (cu
,
19631 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19632 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19633 *cu
->str_offsets_base
, str_index
);
19636 /* Return the length of an LEB128 number in BUF. */
19639 leb128_size (const gdb_byte
*buf
)
19641 const gdb_byte
*begin
= buf
;
19647 if ((byte
& 128) == 0)
19648 return buf
- begin
;
19653 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19662 cu
->language
= language_c
;
19665 case DW_LANG_C_plus_plus
:
19666 case DW_LANG_C_plus_plus_11
:
19667 case DW_LANG_C_plus_plus_14
:
19668 cu
->language
= language_cplus
;
19671 cu
->language
= language_d
;
19673 case DW_LANG_Fortran77
:
19674 case DW_LANG_Fortran90
:
19675 case DW_LANG_Fortran95
:
19676 case DW_LANG_Fortran03
:
19677 case DW_LANG_Fortran08
:
19678 cu
->language
= language_fortran
;
19681 cu
->language
= language_go
;
19683 case DW_LANG_Mips_Assembler
:
19684 cu
->language
= language_asm
;
19686 case DW_LANG_Ada83
:
19687 case DW_LANG_Ada95
:
19688 cu
->language
= language_ada
;
19690 case DW_LANG_Modula2
:
19691 cu
->language
= language_m2
;
19693 case DW_LANG_Pascal83
:
19694 cu
->language
= language_pascal
;
19697 cu
->language
= language_objc
;
19700 case DW_LANG_Rust_old
:
19701 cu
->language
= language_rust
;
19703 case DW_LANG_Cobol74
:
19704 case DW_LANG_Cobol85
:
19706 cu
->language
= language_minimal
;
19709 cu
->language_defn
= language_def (cu
->language
);
19712 /* Return the named attribute or NULL if not there. */
19714 static struct attribute
*
19715 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19720 struct attribute
*spec
= NULL
;
19722 for (i
= 0; i
< die
->num_attrs
; ++i
)
19724 if (die
->attrs
[i
].name
== name
)
19725 return &die
->attrs
[i
];
19726 if (die
->attrs
[i
].name
== DW_AT_specification
19727 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19728 spec
= &die
->attrs
[i
];
19734 die
= follow_die_ref (die
, spec
, &cu
);
19740 /* Return the named attribute or NULL if not there,
19741 but do not follow DW_AT_specification, etc.
19742 This is for use in contexts where we're reading .debug_types dies.
19743 Following DW_AT_specification, DW_AT_abstract_origin will take us
19744 back up the chain, and we want to go down. */
19746 static struct attribute
*
19747 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19751 for (i
= 0; i
< die
->num_attrs
; ++i
)
19752 if (die
->attrs
[i
].name
== name
)
19753 return &die
->attrs
[i
];
19758 /* Return the string associated with a string-typed attribute, or NULL if it
19759 is either not found or is of an incorrect type. */
19761 static const char *
19762 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19764 struct attribute
*attr
;
19765 const char *str
= NULL
;
19767 attr
= dwarf2_attr (die
, name
, cu
);
19771 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19772 || attr
->form
== DW_FORM_string
19773 || attr
->form
== DW_FORM_strx
19774 || attr
->form
== DW_FORM_strx1
19775 || attr
->form
== DW_FORM_strx2
19776 || attr
->form
== DW_FORM_strx3
19777 || attr
->form
== DW_FORM_strx4
19778 || attr
->form
== DW_FORM_GNU_str_index
19779 || attr
->form
== DW_FORM_GNU_strp_alt
)
19780 str
= DW_STRING (attr
);
19782 complaint (_("string type expected for attribute %s for "
19783 "DIE at %s in module %s"),
19784 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19785 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19791 /* Return the dwo name or NULL if not present. If present, it is in either
19792 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19793 static const char *
19794 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19796 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19797 if (dwo_name
== nullptr)
19798 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19802 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19803 and holds a non-zero value. This function should only be used for
19804 DW_FORM_flag or DW_FORM_flag_present attributes. */
19807 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19809 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19811 return (attr
&& DW_UNSND (attr
));
19815 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19817 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19818 which value is non-zero. However, we have to be careful with
19819 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19820 (via dwarf2_flag_true_p) follows this attribute. So we may
19821 end up accidently finding a declaration attribute that belongs
19822 to a different DIE referenced by the specification attribute,
19823 even though the given DIE does not have a declaration attribute. */
19824 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19825 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19828 /* Return the die giving the specification for DIE, if there is
19829 one. *SPEC_CU is the CU containing DIE on input, and the CU
19830 containing the return value on output. If there is no
19831 specification, but there is an abstract origin, that is
19834 static struct die_info
*
19835 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19837 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19840 if (spec_attr
== NULL
)
19841 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19843 if (spec_attr
== NULL
)
19846 return follow_die_ref (die
, spec_attr
, spec_cu
);
19849 /* Stub for free_line_header to match void * callback types. */
19852 free_line_header_voidp (void *arg
)
19854 struct line_header
*lh
= (struct line_header
*) arg
;
19860 line_header::add_include_dir (const char *include_dir
)
19862 if (dwarf_line_debug
>= 2)
19866 new_size
= m_include_dirs
.size ();
19868 new_size
= m_include_dirs
.size () + 1;
19869 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19870 new_size
, include_dir
);
19872 m_include_dirs
.push_back (include_dir
);
19876 line_header::add_file_name (const char *name
,
19878 unsigned int mod_time
,
19879 unsigned int length
)
19881 if (dwarf_line_debug
>= 2)
19885 new_size
= file_names_size ();
19887 new_size
= file_names_size () + 1;
19888 fprintf_unfiltered (gdb_stdlog
, "Adding file %zu: %s\n",
19891 m_file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19894 /* A convenience function to find the proper .debug_line section for a CU. */
19896 static struct dwarf2_section_info
*
19897 get_debug_line_section (struct dwarf2_cu
*cu
)
19899 struct dwarf2_section_info
*section
;
19900 struct dwarf2_per_objfile
*dwarf2_per_objfile
19901 = cu
->per_cu
->dwarf2_per_objfile
;
19903 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19905 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19906 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19907 else if (cu
->per_cu
->is_dwz
)
19909 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19911 section
= &dwz
->line
;
19914 section
= &dwarf2_per_objfile
->line
;
19919 /* Read directory or file name entry format, starting with byte of
19920 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19921 entries count and the entries themselves in the described entry
19925 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19926 bfd
*abfd
, const gdb_byte
**bufp
,
19927 struct line_header
*lh
,
19928 const struct comp_unit_head
*cu_header
,
19929 void (*callback
) (struct line_header
*lh
,
19932 unsigned int mod_time
,
19933 unsigned int length
))
19935 gdb_byte format_count
, formati
;
19936 ULONGEST data_count
, datai
;
19937 const gdb_byte
*buf
= *bufp
;
19938 const gdb_byte
*format_header_data
;
19939 unsigned int bytes_read
;
19941 format_count
= read_1_byte (abfd
, buf
);
19943 format_header_data
= buf
;
19944 for (formati
= 0; formati
< format_count
; formati
++)
19946 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19948 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19952 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19954 for (datai
= 0; datai
< data_count
; datai
++)
19956 const gdb_byte
*format
= format_header_data
;
19957 struct file_entry fe
;
19959 for (formati
= 0; formati
< format_count
; formati
++)
19961 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19962 format
+= bytes_read
;
19964 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19965 format
+= bytes_read
;
19967 gdb::optional
<const char *> string
;
19968 gdb::optional
<unsigned int> uint
;
19972 case DW_FORM_string
:
19973 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
19977 case DW_FORM_line_strp
:
19978 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
19985 case DW_FORM_data1
:
19986 uint
.emplace (read_1_byte (abfd
, buf
));
19990 case DW_FORM_data2
:
19991 uint
.emplace (read_2_bytes (abfd
, buf
));
19995 case DW_FORM_data4
:
19996 uint
.emplace (read_4_bytes (abfd
, buf
));
20000 case DW_FORM_data8
:
20001 uint
.emplace (read_8_bytes (abfd
, buf
));
20005 case DW_FORM_data16
:
20006 /* This is used for MD5, but file_entry does not record MD5s. */
20010 case DW_FORM_udata
:
20011 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20015 case DW_FORM_block
:
20016 /* It is valid only for DW_LNCT_timestamp which is ignored by
20021 switch (content_type
)
20024 if (string
.has_value ())
20027 case DW_LNCT_directory_index
:
20028 if (uint
.has_value ())
20029 fe
.d_index
= (dir_index
) *uint
;
20031 case DW_LNCT_timestamp
:
20032 if (uint
.has_value ())
20033 fe
.mod_time
= *uint
;
20036 if (uint
.has_value ())
20042 complaint (_("Unknown format content type %s"),
20043 pulongest (content_type
));
20047 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20053 /* Read the statement program header starting at OFFSET in
20054 .debug_line, or .debug_line.dwo. Return a pointer
20055 to a struct line_header, allocated using xmalloc.
20056 Returns NULL if there is a problem reading the header, e.g., if it
20057 has a version we don't understand.
20059 NOTE: the strings in the include directory and file name tables of
20060 the returned object point into the dwarf line section buffer,
20061 and must not be freed. */
20063 static line_header_up
20064 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20066 const gdb_byte
*line_ptr
;
20067 unsigned int bytes_read
, offset_size
;
20069 const char *cur_dir
, *cur_file
;
20070 struct dwarf2_section_info
*section
;
20072 struct dwarf2_per_objfile
*dwarf2_per_objfile
20073 = cu
->per_cu
->dwarf2_per_objfile
;
20075 section
= get_debug_line_section (cu
);
20076 section
->read (dwarf2_per_objfile
->objfile
);
20077 if (section
->buffer
== NULL
)
20079 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20080 complaint (_("missing .debug_line.dwo section"));
20082 complaint (_("missing .debug_line section"));
20086 /* We can't do this until we know the section is non-empty.
20087 Only then do we know we have such a section. */
20088 abfd
= section
->get_bfd_owner ();
20090 /* Make sure that at least there's room for the total_length field.
20091 That could be 12 bytes long, but we're just going to fudge that. */
20092 if (to_underlying (sect_off
) + 4 >= section
->size
)
20094 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20098 line_header_up
lh (new line_header ());
20100 lh
->sect_off
= sect_off
;
20101 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20103 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20105 /* Read in the header. */
20107 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20108 &bytes_read
, &offset_size
);
20109 line_ptr
+= bytes_read
;
20111 const gdb_byte
*start_here
= line_ptr
;
20113 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20115 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20118 lh
->statement_program_end
= start_here
+ lh
->total_length
;
20119 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20121 if (lh
->version
> 5)
20123 /* This is a version we don't understand. The format could have
20124 changed in ways we don't handle properly so just punt. */
20125 complaint (_("unsupported version in .debug_line section"));
20128 if (lh
->version
>= 5)
20130 gdb_byte segment_selector_size
;
20132 /* Skip address size. */
20133 read_1_byte (abfd
, line_ptr
);
20136 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20138 if (segment_selector_size
!= 0)
20140 complaint (_("unsupported segment selector size %u "
20141 "in .debug_line section"),
20142 segment_selector_size
);
20146 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20147 line_ptr
+= offset_size
;
20148 lh
->statement_program_start
= line_ptr
+ lh
->header_length
;
20149 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20151 if (lh
->version
>= 4)
20153 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20157 lh
->maximum_ops_per_instruction
= 1;
20159 if (lh
->maximum_ops_per_instruction
== 0)
20161 lh
->maximum_ops_per_instruction
= 1;
20162 complaint (_("invalid maximum_ops_per_instruction "
20163 "in `.debug_line' section"));
20166 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20168 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20170 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20172 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20174 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20176 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20177 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20179 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20183 if (lh
->version
>= 5)
20185 /* Read directory table. */
20186 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20188 [] (struct line_header
*header
, const char *name
,
20189 dir_index d_index
, unsigned int mod_time
,
20190 unsigned int length
)
20192 header
->add_include_dir (name
);
20195 /* Read file name table. */
20196 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20198 [] (struct line_header
*header
, const char *name
,
20199 dir_index d_index
, unsigned int mod_time
,
20200 unsigned int length
)
20202 header
->add_file_name (name
, d_index
, mod_time
, length
);
20207 /* Read directory table. */
20208 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20210 line_ptr
+= bytes_read
;
20211 lh
->add_include_dir (cur_dir
);
20213 line_ptr
+= bytes_read
;
20215 /* Read file name table. */
20216 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20218 unsigned int mod_time
, length
;
20221 line_ptr
+= bytes_read
;
20222 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20223 line_ptr
+= bytes_read
;
20224 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20225 line_ptr
+= bytes_read
;
20226 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20227 line_ptr
+= bytes_read
;
20229 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20231 line_ptr
+= bytes_read
;
20234 if (line_ptr
> (section
->buffer
+ section
->size
))
20235 complaint (_("line number info header doesn't "
20236 "fit in `.debug_line' section"));
20241 /* Subroutine of dwarf_decode_lines to simplify it.
20242 Return the file name of the psymtab for the given file_entry.
20243 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20244 If space for the result is malloc'd, *NAME_HOLDER will be set.
20245 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20247 static const char *
20248 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
20249 const dwarf2_psymtab
*pst
,
20250 const char *comp_dir
,
20251 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20253 const char *include_name
= fe
.name
;
20254 const char *include_name_to_compare
= include_name
;
20255 const char *pst_filename
;
20258 const char *dir_name
= fe
.include_dir (lh
);
20260 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20261 if (!IS_ABSOLUTE_PATH (include_name
)
20262 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20264 /* Avoid creating a duplicate psymtab for PST.
20265 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20266 Before we do the comparison, however, we need to account
20267 for DIR_NAME and COMP_DIR.
20268 First prepend dir_name (if non-NULL). If we still don't
20269 have an absolute path prepend comp_dir (if non-NULL).
20270 However, the directory we record in the include-file's
20271 psymtab does not contain COMP_DIR (to match the
20272 corresponding symtab(s)).
20277 bash$ gcc -g ./hello.c
20278 include_name = "hello.c"
20280 DW_AT_comp_dir = comp_dir = "/tmp"
20281 DW_AT_name = "./hello.c"
20285 if (dir_name
!= NULL
)
20287 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20288 include_name
, (char *) NULL
));
20289 include_name
= name_holder
->get ();
20290 include_name_to_compare
= include_name
;
20292 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20294 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20295 include_name
, (char *) NULL
));
20296 include_name_to_compare
= hold_compare
.get ();
20300 pst_filename
= pst
->filename
;
20301 gdb::unique_xmalloc_ptr
<char> copied_name
;
20302 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20304 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20305 pst_filename
, (char *) NULL
));
20306 pst_filename
= copied_name
.get ();
20309 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20313 return include_name
;
20316 /* State machine to track the state of the line number program. */
20318 class lnp_state_machine
20321 /* Initialize a machine state for the start of a line number
20323 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20324 bool record_lines_p
);
20326 file_entry
*current_file ()
20328 /* lh->file_names is 0-based, but the file name numbers in the
20329 statement program are 1-based. */
20330 return m_line_header
->file_name_at (m_file
);
20333 /* Record the line in the state machine. END_SEQUENCE is true if
20334 we're processing the end of a sequence. */
20335 void record_line (bool end_sequence
);
20337 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20338 nop-out rest of the lines in this sequence. */
20339 void check_line_address (struct dwarf2_cu
*cu
,
20340 const gdb_byte
*line_ptr
,
20341 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20343 void handle_set_discriminator (unsigned int discriminator
)
20345 m_discriminator
= discriminator
;
20346 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20349 /* Handle DW_LNE_set_address. */
20350 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20353 address
+= baseaddr
;
20354 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20357 /* Handle DW_LNS_advance_pc. */
20358 void handle_advance_pc (CORE_ADDR adjust
);
20360 /* Handle a special opcode. */
20361 void handle_special_opcode (unsigned char op_code
);
20363 /* Handle DW_LNS_advance_line. */
20364 void handle_advance_line (int line_delta
)
20366 advance_line (line_delta
);
20369 /* Handle DW_LNS_set_file. */
20370 void handle_set_file (file_name_index file
);
20372 /* Handle DW_LNS_negate_stmt. */
20373 void handle_negate_stmt ()
20375 m_is_stmt
= !m_is_stmt
;
20378 /* Handle DW_LNS_const_add_pc. */
20379 void handle_const_add_pc ();
20381 /* Handle DW_LNS_fixed_advance_pc. */
20382 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20384 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20388 /* Handle DW_LNS_copy. */
20389 void handle_copy ()
20391 record_line (false);
20392 m_discriminator
= 0;
20395 /* Handle DW_LNE_end_sequence. */
20396 void handle_end_sequence ()
20398 m_currently_recording_lines
= true;
20402 /* Advance the line by LINE_DELTA. */
20403 void advance_line (int line_delta
)
20405 m_line
+= line_delta
;
20407 if (line_delta
!= 0)
20408 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20411 struct dwarf2_cu
*m_cu
;
20413 gdbarch
*m_gdbarch
;
20415 /* True if we're recording lines.
20416 Otherwise we're building partial symtabs and are just interested in
20417 finding include files mentioned by the line number program. */
20418 bool m_record_lines_p
;
20420 /* The line number header. */
20421 line_header
*m_line_header
;
20423 /* These are part of the standard DWARF line number state machine,
20424 and initialized according to the DWARF spec. */
20426 unsigned char m_op_index
= 0;
20427 /* The line table index of the current file. */
20428 file_name_index m_file
= 1;
20429 unsigned int m_line
= 1;
20431 /* These are initialized in the constructor. */
20433 CORE_ADDR m_address
;
20435 unsigned int m_discriminator
;
20437 /* Additional bits of state we need to track. */
20439 /* The last file that we called dwarf2_start_subfile for.
20440 This is only used for TLLs. */
20441 unsigned int m_last_file
= 0;
20442 /* The last file a line number was recorded for. */
20443 struct subfile
*m_last_subfile
= NULL
;
20445 /* When true, record the lines we decode. */
20446 bool m_currently_recording_lines
= false;
20448 /* The last line number that was recorded, used to coalesce
20449 consecutive entries for the same line. This can happen, for
20450 example, when discriminators are present. PR 17276. */
20451 unsigned int m_last_line
= 0;
20452 bool m_line_has_non_zero_discriminator
= false;
20456 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20458 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20459 / m_line_header
->maximum_ops_per_instruction
)
20460 * m_line_header
->minimum_instruction_length
);
20461 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20462 m_op_index
= ((m_op_index
+ adjust
)
20463 % m_line_header
->maximum_ops_per_instruction
);
20467 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20469 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20470 CORE_ADDR addr_adj
= (((m_op_index
20471 + (adj_opcode
/ m_line_header
->line_range
))
20472 / m_line_header
->maximum_ops_per_instruction
)
20473 * m_line_header
->minimum_instruction_length
);
20474 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20475 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20476 % m_line_header
->maximum_ops_per_instruction
);
20478 int line_delta
= (m_line_header
->line_base
20479 + (adj_opcode
% m_line_header
->line_range
));
20480 advance_line (line_delta
);
20481 record_line (false);
20482 m_discriminator
= 0;
20486 lnp_state_machine::handle_set_file (file_name_index file
)
20490 const file_entry
*fe
= current_file ();
20492 dwarf2_debug_line_missing_file_complaint ();
20493 else if (m_record_lines_p
)
20495 const char *dir
= fe
->include_dir (m_line_header
);
20497 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20498 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20499 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20504 lnp_state_machine::handle_const_add_pc ()
20507 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20510 = (((m_op_index
+ adjust
)
20511 / m_line_header
->maximum_ops_per_instruction
)
20512 * m_line_header
->minimum_instruction_length
);
20514 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20515 m_op_index
= ((m_op_index
+ adjust
)
20516 % m_line_header
->maximum_ops_per_instruction
);
20519 /* Return non-zero if we should add LINE to the line number table.
20520 LINE is the line to add, LAST_LINE is the last line that was added,
20521 LAST_SUBFILE is the subfile for LAST_LINE.
20522 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20523 had a non-zero discriminator.
20525 We have to be careful in the presence of discriminators.
20526 E.g., for this line:
20528 for (i = 0; i < 100000; i++);
20530 clang can emit four line number entries for that one line,
20531 each with a different discriminator.
20532 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20534 However, we want gdb to coalesce all four entries into one.
20535 Otherwise the user could stepi into the middle of the line and
20536 gdb would get confused about whether the pc really was in the
20537 middle of the line.
20539 Things are further complicated by the fact that two consecutive
20540 line number entries for the same line is a heuristic used by gcc
20541 to denote the end of the prologue. So we can't just discard duplicate
20542 entries, we have to be selective about it. The heuristic we use is
20543 that we only collapse consecutive entries for the same line if at least
20544 one of those entries has a non-zero discriminator. PR 17276.
20546 Note: Addresses in the line number state machine can never go backwards
20547 within one sequence, thus this coalescing is ok. */
20550 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20551 unsigned int line
, unsigned int last_line
,
20552 int line_has_non_zero_discriminator
,
20553 struct subfile
*last_subfile
)
20555 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20557 if (line
!= last_line
)
20559 /* Same line for the same file that we've seen already.
20560 As a last check, for pr 17276, only record the line if the line
20561 has never had a non-zero discriminator. */
20562 if (!line_has_non_zero_discriminator
)
20567 /* Use the CU's builder to record line number LINE beginning at
20568 address ADDRESS in the line table of subfile SUBFILE. */
20571 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20572 unsigned int line
, CORE_ADDR address
,
20573 struct dwarf2_cu
*cu
)
20575 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20577 if (dwarf_line_debug
)
20579 fprintf_unfiltered (gdb_stdlog
,
20580 "Recording line %u, file %s, address %s\n",
20581 line
, lbasename (subfile
->name
),
20582 paddress (gdbarch
, address
));
20586 cu
->get_builder ()->record_line (subfile
, line
, addr
);
20589 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20590 Mark the end of a set of line number records.
20591 The arguments are the same as for dwarf_record_line_1.
20592 If SUBFILE is NULL the request is ignored. */
20595 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20596 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20598 if (subfile
== NULL
)
20601 if (dwarf_line_debug
)
20603 fprintf_unfiltered (gdb_stdlog
,
20604 "Finishing current line, file %s, address %s\n",
20605 lbasename (subfile
->name
),
20606 paddress (gdbarch
, address
));
20609 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20613 lnp_state_machine::record_line (bool end_sequence
)
20615 if (dwarf_line_debug
)
20617 fprintf_unfiltered (gdb_stdlog
,
20618 "Processing actual line %u: file %u,"
20619 " address %s, is_stmt %u, discrim %u%s\n",
20621 paddress (m_gdbarch
, m_address
),
20622 m_is_stmt
, m_discriminator
,
20623 (end_sequence
? "\t(end sequence)" : ""));
20626 file_entry
*fe
= current_file ();
20629 dwarf2_debug_line_missing_file_complaint ();
20630 /* For now we ignore lines not starting on an instruction boundary.
20631 But not when processing end_sequence for compatibility with the
20632 previous version of the code. */
20633 else if (m_op_index
== 0 || end_sequence
)
20635 fe
->included_p
= 1;
20636 if (m_record_lines_p
20637 && (producer_is_codewarrior (m_cu
) || m_is_stmt
|| end_sequence
))
20639 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20642 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20643 m_currently_recording_lines
? m_cu
: nullptr);
20648 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20649 m_line_has_non_zero_discriminator
,
20652 buildsym_compunit
*builder
= m_cu
->get_builder ();
20653 dwarf_record_line_1 (m_gdbarch
,
20654 builder
->get_current_subfile (),
20656 m_currently_recording_lines
? m_cu
: nullptr);
20658 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20659 m_last_line
= m_line
;
20665 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20666 line_header
*lh
, bool record_lines_p
)
20670 m_record_lines_p
= record_lines_p
;
20671 m_line_header
= lh
;
20673 m_currently_recording_lines
= true;
20675 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20676 was a line entry for it so that the backend has a chance to adjust it
20677 and also record it in case it needs it. This is currently used by MIPS
20678 code, cf. `mips_adjust_dwarf2_line'. */
20679 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20680 m_is_stmt
= lh
->default_is_stmt
;
20681 m_discriminator
= 0;
20685 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20686 const gdb_byte
*line_ptr
,
20687 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20689 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20690 the pc range of the CU. However, we restrict the test to only ADDRESS
20691 values of zero to preserve GDB's previous behaviour which is to handle
20692 the specific case of a function being GC'd by the linker. */
20694 if (address
== 0 && address
< unrelocated_lowpc
)
20696 /* This line table is for a function which has been
20697 GCd by the linker. Ignore it. PR gdb/12528 */
20699 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20700 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20702 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20703 line_offset
, objfile_name (objfile
));
20704 m_currently_recording_lines
= false;
20705 /* Note: m_currently_recording_lines is left as false until we see
20706 DW_LNE_end_sequence. */
20710 /* Subroutine of dwarf_decode_lines to simplify it.
20711 Process the line number information in LH.
20712 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20713 program in order to set included_p for every referenced header. */
20716 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20717 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20719 const gdb_byte
*line_ptr
, *extended_end
;
20720 const gdb_byte
*line_end
;
20721 unsigned int bytes_read
, extended_len
;
20722 unsigned char op_code
, extended_op
;
20723 CORE_ADDR baseaddr
;
20724 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20725 bfd
*abfd
= objfile
->obfd
;
20726 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20727 /* True if we're recording line info (as opposed to building partial
20728 symtabs and just interested in finding include files mentioned by
20729 the line number program). */
20730 bool record_lines_p
= !decode_for_pst_p
;
20732 baseaddr
= objfile
->text_section_offset ();
20734 line_ptr
= lh
->statement_program_start
;
20735 line_end
= lh
->statement_program_end
;
20737 /* Read the statement sequences until there's nothing left. */
20738 while (line_ptr
< line_end
)
20740 /* The DWARF line number program state machine. Reset the state
20741 machine at the start of each sequence. */
20742 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20743 bool end_sequence
= false;
20745 if (record_lines_p
)
20747 /* Start a subfile for the current file of the state
20749 const file_entry
*fe
= state_machine
.current_file ();
20752 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20755 /* Decode the table. */
20756 while (line_ptr
< line_end
&& !end_sequence
)
20758 op_code
= read_1_byte (abfd
, line_ptr
);
20761 if (op_code
>= lh
->opcode_base
)
20763 /* Special opcode. */
20764 state_machine
.handle_special_opcode (op_code
);
20766 else switch (op_code
)
20768 case DW_LNS_extended_op
:
20769 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20771 line_ptr
+= bytes_read
;
20772 extended_end
= line_ptr
+ extended_len
;
20773 extended_op
= read_1_byte (abfd
, line_ptr
);
20775 switch (extended_op
)
20777 case DW_LNE_end_sequence
:
20778 state_machine
.handle_end_sequence ();
20779 end_sequence
= true;
20781 case DW_LNE_set_address
:
20784 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20785 line_ptr
+= bytes_read
;
20787 state_machine
.check_line_address (cu
, line_ptr
,
20788 lowpc
- baseaddr
, address
);
20789 state_machine
.handle_set_address (baseaddr
, address
);
20792 case DW_LNE_define_file
:
20794 const char *cur_file
;
20795 unsigned int mod_time
, length
;
20798 cur_file
= read_direct_string (abfd
, line_ptr
,
20800 line_ptr
+= bytes_read
;
20801 dindex
= (dir_index
)
20802 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20803 line_ptr
+= bytes_read
;
20805 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20806 line_ptr
+= bytes_read
;
20808 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20809 line_ptr
+= bytes_read
;
20810 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20813 case DW_LNE_set_discriminator
:
20815 /* The discriminator is not interesting to the
20816 debugger; just ignore it. We still need to
20817 check its value though:
20818 if there are consecutive entries for the same
20819 (non-prologue) line we want to coalesce them.
20822 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20823 line_ptr
+= bytes_read
;
20825 state_machine
.handle_set_discriminator (discr
);
20829 complaint (_("mangled .debug_line section"));
20832 /* Make sure that we parsed the extended op correctly. If e.g.
20833 we expected a different address size than the producer used,
20834 we may have read the wrong number of bytes. */
20835 if (line_ptr
!= extended_end
)
20837 complaint (_("mangled .debug_line section"));
20842 state_machine
.handle_copy ();
20844 case DW_LNS_advance_pc
:
20847 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20848 line_ptr
+= bytes_read
;
20850 state_machine
.handle_advance_pc (adjust
);
20853 case DW_LNS_advance_line
:
20856 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20857 line_ptr
+= bytes_read
;
20859 state_machine
.handle_advance_line (line_delta
);
20862 case DW_LNS_set_file
:
20864 file_name_index file
20865 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20867 line_ptr
+= bytes_read
;
20869 state_machine
.handle_set_file (file
);
20872 case DW_LNS_set_column
:
20873 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20874 line_ptr
+= bytes_read
;
20876 case DW_LNS_negate_stmt
:
20877 state_machine
.handle_negate_stmt ();
20879 case DW_LNS_set_basic_block
:
20881 /* Add to the address register of the state machine the
20882 address increment value corresponding to special opcode
20883 255. I.e., this value is scaled by the minimum
20884 instruction length since special opcode 255 would have
20885 scaled the increment. */
20886 case DW_LNS_const_add_pc
:
20887 state_machine
.handle_const_add_pc ();
20889 case DW_LNS_fixed_advance_pc
:
20891 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20894 state_machine
.handle_fixed_advance_pc (addr_adj
);
20899 /* Unknown standard opcode, ignore it. */
20902 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20904 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20905 line_ptr
+= bytes_read
;
20912 dwarf2_debug_line_missing_end_sequence_complaint ();
20914 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20915 in which case we still finish recording the last line). */
20916 state_machine
.record_line (true);
20920 /* Decode the Line Number Program (LNP) for the given line_header
20921 structure and CU. The actual information extracted and the type
20922 of structures created from the LNP depends on the value of PST.
20924 1. If PST is NULL, then this procedure uses the data from the program
20925 to create all necessary symbol tables, and their linetables.
20927 2. If PST is not NULL, this procedure reads the program to determine
20928 the list of files included by the unit represented by PST, and
20929 builds all the associated partial symbol tables.
20931 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20932 It is used for relative paths in the line table.
20933 NOTE: When processing partial symtabs (pst != NULL),
20934 comp_dir == pst->dirname.
20936 NOTE: It is important that psymtabs have the same file name (via strcmp)
20937 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20938 symtab we don't use it in the name of the psymtabs we create.
20939 E.g. expand_line_sal requires this when finding psymtabs to expand.
20940 A good testcase for this is mb-inline.exp.
20942 LOWPC is the lowest address in CU (or 0 if not known).
20944 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20945 for its PC<->lines mapping information. Otherwise only the filename
20946 table is read in. */
20949 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20950 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20951 CORE_ADDR lowpc
, int decode_mapping
)
20953 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20954 const int decode_for_pst_p
= (pst
!= NULL
);
20956 if (decode_mapping
)
20957 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20959 if (decode_for_pst_p
)
20961 /* Now that we're done scanning the Line Header Program, we can
20962 create the psymtab of each included file. */
20963 for (auto &file_entry
: lh
->file_names ())
20964 if (file_entry
.included_p
== 1)
20966 gdb::unique_xmalloc_ptr
<char> name_holder
;
20967 const char *include_name
=
20968 psymtab_include_file_name (lh
, file_entry
, pst
,
20969 comp_dir
, &name_holder
);
20970 if (include_name
!= NULL
)
20971 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20976 /* Make sure a symtab is created for every file, even files
20977 which contain only variables (i.e. no code with associated
20979 buildsym_compunit
*builder
= cu
->get_builder ();
20980 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20982 for (auto &fe
: lh
->file_names ())
20984 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20985 if (builder
->get_current_subfile ()->symtab
== NULL
)
20987 builder
->get_current_subfile ()->symtab
20988 = allocate_symtab (cust
,
20989 builder
->get_current_subfile ()->name
);
20991 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20996 /* Start a subfile for DWARF. FILENAME is the name of the file and
20997 DIRNAME the name of the source directory which contains FILENAME
20998 or NULL if not known.
20999 This routine tries to keep line numbers from identical absolute and
21000 relative file names in a common subfile.
21002 Using the `list' example from the GDB testsuite, which resides in
21003 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21004 of /srcdir/list0.c yields the following debugging information for list0.c:
21006 DW_AT_name: /srcdir/list0.c
21007 DW_AT_comp_dir: /compdir
21008 files.files[0].name: list0.h
21009 files.files[0].dir: /srcdir
21010 files.files[1].name: list0.c
21011 files.files[1].dir: /srcdir
21013 The line number information for list0.c has to end up in a single
21014 subfile, so that `break /srcdir/list0.c:1' works as expected.
21015 start_subfile will ensure that this happens provided that we pass the
21016 concatenation of files.files[1].dir and files.files[1].name as the
21020 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21021 const char *dirname
)
21023 gdb::unique_xmalloc_ptr
<char> copy
;
21025 /* In order not to lose the line information directory,
21026 we concatenate it to the filename when it makes sense.
21027 Note that the Dwarf3 standard says (speaking of filenames in line
21028 information): ``The directory index is ignored for file names
21029 that represent full path names''. Thus ignoring dirname in the
21030 `else' branch below isn't an issue. */
21032 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21034 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
21035 filename
= copy
.get ();
21038 cu
->get_builder ()->start_subfile (filename
);
21041 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21042 buildsym_compunit constructor. */
21044 struct compunit_symtab
*
21045 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21048 gdb_assert (m_builder
== nullptr);
21050 m_builder
.reset (new struct buildsym_compunit
21051 (per_cu
->dwarf2_per_objfile
->objfile
,
21052 name
, comp_dir
, language
, low_pc
));
21054 list_in_scope
= get_builder ()->get_file_symbols ();
21056 get_builder ()->record_debugformat ("DWARF 2");
21057 get_builder ()->record_producer (producer
);
21059 processing_has_namespace_info
= false;
21061 return get_builder ()->get_compunit_symtab ();
21065 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21066 struct dwarf2_cu
*cu
)
21068 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21069 struct comp_unit_head
*cu_header
= &cu
->header
;
21071 /* NOTE drow/2003-01-30: There used to be a comment and some special
21072 code here to turn a symbol with DW_AT_external and a
21073 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21074 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21075 with some versions of binutils) where shared libraries could have
21076 relocations against symbols in their debug information - the
21077 minimal symbol would have the right address, but the debug info
21078 would not. It's no longer necessary, because we will explicitly
21079 apply relocations when we read in the debug information now. */
21081 /* A DW_AT_location attribute with no contents indicates that a
21082 variable has been optimized away. */
21083 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
21085 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21089 /* Handle one degenerate form of location expression specially, to
21090 preserve GDB's previous behavior when section offsets are
21091 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21092 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21094 if (attr
->form_is_block ()
21095 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21096 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21097 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21098 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21099 && (DW_BLOCK (attr
)->size
21100 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21102 unsigned int dummy
;
21104 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21105 SET_SYMBOL_VALUE_ADDRESS (sym
,
21106 read_address (objfile
->obfd
,
21107 DW_BLOCK (attr
)->data
+ 1,
21110 SET_SYMBOL_VALUE_ADDRESS
21111 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
21113 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21114 fixup_symbol_section (sym
, objfile
);
21115 SET_SYMBOL_VALUE_ADDRESS
21117 SYMBOL_VALUE_ADDRESS (sym
)
21118 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
21122 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21123 expression evaluator, and use LOC_COMPUTED only when necessary
21124 (i.e. when the value of a register or memory location is
21125 referenced, or a thread-local block, etc.). Then again, it might
21126 not be worthwhile. I'm assuming that it isn't unless performance
21127 or memory numbers show me otherwise. */
21129 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21131 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21132 cu
->has_loclist
= true;
21135 /* Given a pointer to a DWARF information entry, figure out if we need
21136 to make a symbol table entry for it, and if so, create a new entry
21137 and return a pointer to it.
21138 If TYPE is NULL, determine symbol type from the die, otherwise
21139 used the passed type.
21140 If SPACE is not NULL, use it to hold the new symbol. If it is
21141 NULL, allocate a new symbol on the objfile's obstack. */
21143 static struct symbol
*
21144 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21145 struct symbol
*space
)
21147 struct dwarf2_per_objfile
*dwarf2_per_objfile
21148 = cu
->per_cu
->dwarf2_per_objfile
;
21149 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21150 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21151 struct symbol
*sym
= NULL
;
21153 struct attribute
*attr
= NULL
;
21154 struct attribute
*attr2
= NULL
;
21155 CORE_ADDR baseaddr
;
21156 struct pending
**list_to_add
= NULL
;
21158 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21160 baseaddr
= objfile
->text_section_offset ();
21162 name
= dwarf2_name (die
, cu
);
21165 const char *linkagename
;
21166 int suppress_add
= 0;
21171 sym
= allocate_symbol (objfile
);
21172 OBJSTAT (objfile
, n_syms
++);
21174 /* Cache this symbol's name and the name's demangled form (if any). */
21175 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
21176 linkagename
= dwarf2_physname (name
, die
, cu
);
21177 sym
->compute_and_set_names (linkagename
, false, objfile
->per_bfd
);
21179 /* Fortran does not have mangling standard and the mangling does differ
21180 between gfortran, iFort etc. */
21181 if (cu
->language
== language_fortran
21182 && symbol_get_demangled_name (sym
) == NULL
)
21183 symbol_set_demangled_name (sym
,
21184 dwarf2_full_name (name
, die
, cu
),
21187 /* Default assumptions.
21188 Use the passed type or decode it from the die. */
21189 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21190 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21192 SYMBOL_TYPE (sym
) = type
;
21194 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21195 attr
= dwarf2_attr (die
,
21196 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21198 if (attr
!= nullptr)
21200 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21203 attr
= dwarf2_attr (die
,
21204 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21206 if (attr
!= nullptr)
21208 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21209 struct file_entry
*fe
;
21211 if (cu
->line_header
!= NULL
)
21212 fe
= cu
->line_header
->file_name_at (file_index
);
21217 complaint (_("file index out of range"));
21219 symbol_set_symtab (sym
, fe
->symtab
);
21225 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21226 if (attr
!= nullptr)
21230 addr
= attr
->value_as_address ();
21231 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21232 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
21234 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21235 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21236 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21237 add_symbol_to_list (sym
, cu
->list_in_scope
);
21239 case DW_TAG_subprogram
:
21240 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21242 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21243 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21244 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21245 || cu
->language
== language_ada
21246 || cu
->language
== language_fortran
)
21248 /* Subprograms marked external are stored as a global symbol.
21249 Ada and Fortran subprograms, whether marked external or
21250 not, are always stored as a global symbol, because we want
21251 to be able to access them globally. For instance, we want
21252 to be able to break on a nested subprogram without having
21253 to specify the context. */
21254 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21258 list_to_add
= cu
->list_in_scope
;
21261 case DW_TAG_inlined_subroutine
:
21262 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21264 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21265 SYMBOL_INLINED (sym
) = 1;
21266 list_to_add
= cu
->list_in_scope
;
21268 case DW_TAG_template_value_param
:
21270 /* Fall through. */
21271 case DW_TAG_constant
:
21272 case DW_TAG_variable
:
21273 case DW_TAG_member
:
21274 /* Compilation with minimal debug info may result in
21275 variables with missing type entries. Change the
21276 misleading `void' type to something sensible. */
21277 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21278 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21280 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21281 /* In the case of DW_TAG_member, we should only be called for
21282 static const members. */
21283 if (die
->tag
== DW_TAG_member
)
21285 /* dwarf2_add_field uses die_is_declaration,
21286 so we do the same. */
21287 gdb_assert (die_is_declaration (die
, cu
));
21290 if (attr
!= nullptr)
21292 dwarf2_const_value (attr
, sym
, cu
);
21293 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21296 if (attr2
&& (DW_UNSND (attr2
) != 0))
21297 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21299 list_to_add
= cu
->list_in_scope
;
21303 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21304 if (attr
!= nullptr)
21306 var_decode_location (attr
, sym
, cu
);
21307 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21309 /* Fortran explicitly imports any global symbols to the local
21310 scope by DW_TAG_common_block. */
21311 if (cu
->language
== language_fortran
&& die
->parent
21312 && die
->parent
->tag
== DW_TAG_common_block
)
21315 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21316 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21317 && !dwarf2_per_objfile
->has_section_at_zero
)
21319 /* When a static variable is eliminated by the linker,
21320 the corresponding debug information is not stripped
21321 out, but the variable address is set to null;
21322 do not add such variables into symbol table. */
21324 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21326 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21327 && (objfile
->flags
& OBJF_MAINLINE
) == 0
21328 && dwarf2_per_objfile
->can_copy
)
21330 /* A global static variable might be subject to
21331 copy relocation. We first check for a local
21332 minsym, though, because maybe the symbol was
21333 marked hidden, in which case this would not
21335 bound_minimal_symbol found
21336 = (lookup_minimal_symbol_linkage
21337 (sym
->linkage_name (), objfile
));
21338 if (found
.minsym
!= nullptr)
21339 sym
->maybe_copied
= 1;
21342 /* A variable with DW_AT_external is never static,
21343 but it may be block-scoped. */
21345 = ((cu
->list_in_scope
21346 == cu
->get_builder ()->get_file_symbols ())
21347 ? cu
->get_builder ()->get_global_symbols ()
21348 : cu
->list_in_scope
);
21351 list_to_add
= cu
->list_in_scope
;
21355 /* We do not know the address of this symbol.
21356 If it is an external symbol and we have type information
21357 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21358 The address of the variable will then be determined from
21359 the minimal symbol table whenever the variable is
21361 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21363 /* Fortran explicitly imports any global symbols to the local
21364 scope by DW_TAG_common_block. */
21365 if (cu
->language
== language_fortran
&& die
->parent
21366 && die
->parent
->tag
== DW_TAG_common_block
)
21368 /* SYMBOL_CLASS doesn't matter here because
21369 read_common_block is going to reset it. */
21371 list_to_add
= cu
->list_in_scope
;
21373 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21374 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21376 /* A variable with DW_AT_external is never static, but it
21377 may be block-scoped. */
21379 = ((cu
->list_in_scope
21380 == cu
->get_builder ()->get_file_symbols ())
21381 ? cu
->get_builder ()->get_global_symbols ()
21382 : cu
->list_in_scope
);
21384 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21386 else if (!die_is_declaration (die
, cu
))
21388 /* Use the default LOC_OPTIMIZED_OUT class. */
21389 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21391 list_to_add
= cu
->list_in_scope
;
21395 case DW_TAG_formal_parameter
:
21397 /* If we are inside a function, mark this as an argument. If
21398 not, we might be looking at an argument to an inlined function
21399 when we do not have enough information to show inlined frames;
21400 pretend it's a local variable in that case so that the user can
21402 struct context_stack
*curr
21403 = cu
->get_builder ()->get_current_context_stack ();
21404 if (curr
!= nullptr && curr
->name
!= nullptr)
21405 SYMBOL_IS_ARGUMENT (sym
) = 1;
21406 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21407 if (attr
!= nullptr)
21409 var_decode_location (attr
, sym
, cu
);
21411 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21412 if (attr
!= nullptr)
21414 dwarf2_const_value (attr
, sym
, cu
);
21417 list_to_add
= cu
->list_in_scope
;
21420 case DW_TAG_unspecified_parameters
:
21421 /* From varargs functions; gdb doesn't seem to have any
21422 interest in this information, so just ignore it for now.
21425 case DW_TAG_template_type_param
:
21427 /* Fall through. */
21428 case DW_TAG_class_type
:
21429 case DW_TAG_interface_type
:
21430 case DW_TAG_structure_type
:
21431 case DW_TAG_union_type
:
21432 case DW_TAG_set_type
:
21433 case DW_TAG_enumeration_type
:
21434 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21435 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21438 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21439 really ever be static objects: otherwise, if you try
21440 to, say, break of a class's method and you're in a file
21441 which doesn't mention that class, it won't work unless
21442 the check for all static symbols in lookup_symbol_aux
21443 saves you. See the OtherFileClass tests in
21444 gdb.c++/namespace.exp. */
21448 buildsym_compunit
*builder
= cu
->get_builder ();
21450 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21451 && cu
->language
== language_cplus
21452 ? builder
->get_global_symbols ()
21453 : cu
->list_in_scope
);
21455 /* The semantics of C++ state that "struct foo {
21456 ... }" also defines a typedef for "foo". */
21457 if (cu
->language
== language_cplus
21458 || cu
->language
== language_ada
21459 || cu
->language
== language_d
21460 || cu
->language
== language_rust
)
21462 /* The symbol's name is already allocated along
21463 with this objfile, so we don't need to
21464 duplicate it for the type. */
21465 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21466 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
21471 case DW_TAG_typedef
:
21472 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21473 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21474 list_to_add
= cu
->list_in_scope
;
21476 case DW_TAG_base_type
:
21477 case DW_TAG_subrange_type
:
21478 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21479 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21480 list_to_add
= cu
->list_in_scope
;
21482 case DW_TAG_enumerator
:
21483 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21484 if (attr
!= nullptr)
21486 dwarf2_const_value (attr
, sym
, cu
);
21489 /* NOTE: carlton/2003-11-10: See comment above in the
21490 DW_TAG_class_type, etc. block. */
21493 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21494 && cu
->language
== language_cplus
21495 ? cu
->get_builder ()->get_global_symbols ()
21496 : cu
->list_in_scope
);
21499 case DW_TAG_imported_declaration
:
21500 case DW_TAG_namespace
:
21501 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21502 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21504 case DW_TAG_module
:
21505 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21506 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21507 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21509 case DW_TAG_common_block
:
21510 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21511 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21512 add_symbol_to_list (sym
, cu
->list_in_scope
);
21515 /* Not a tag we recognize. Hopefully we aren't processing
21516 trash data, but since we must specifically ignore things
21517 we don't recognize, there is nothing else we should do at
21519 complaint (_("unsupported tag: '%s'"),
21520 dwarf_tag_name (die
->tag
));
21526 sym
->hash_next
= objfile
->template_symbols
;
21527 objfile
->template_symbols
= sym
;
21528 list_to_add
= NULL
;
21531 if (list_to_add
!= NULL
)
21532 add_symbol_to_list (sym
, list_to_add
);
21534 /* For the benefit of old versions of GCC, check for anonymous
21535 namespaces based on the demangled name. */
21536 if (!cu
->processing_has_namespace_info
21537 && cu
->language
== language_cplus
)
21538 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21543 /* Given an attr with a DW_FORM_dataN value in host byte order,
21544 zero-extend it as appropriate for the symbol's type. The DWARF
21545 standard (v4) is not entirely clear about the meaning of using
21546 DW_FORM_dataN for a constant with a signed type, where the type is
21547 wider than the data. The conclusion of a discussion on the DWARF
21548 list was that this is unspecified. We choose to always zero-extend
21549 because that is the interpretation long in use by GCC. */
21552 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21553 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21555 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21556 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21557 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21558 LONGEST l
= DW_UNSND (attr
);
21560 if (bits
< sizeof (*value
) * 8)
21562 l
&= ((LONGEST
) 1 << bits
) - 1;
21565 else if (bits
== sizeof (*value
) * 8)
21569 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21570 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21577 /* Read a constant value from an attribute. Either set *VALUE, or if
21578 the value does not fit in *VALUE, set *BYTES - either already
21579 allocated on the objfile obstack, or newly allocated on OBSTACK,
21580 or, set *BATON, if we translated the constant to a location
21584 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21585 const char *name
, struct obstack
*obstack
,
21586 struct dwarf2_cu
*cu
,
21587 LONGEST
*value
, const gdb_byte
**bytes
,
21588 struct dwarf2_locexpr_baton
**baton
)
21590 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21591 struct comp_unit_head
*cu_header
= &cu
->header
;
21592 struct dwarf_block
*blk
;
21593 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21594 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21600 switch (attr
->form
)
21603 case DW_FORM_addrx
:
21604 case DW_FORM_GNU_addr_index
:
21608 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21609 dwarf2_const_value_length_mismatch_complaint (name
,
21610 cu_header
->addr_size
,
21611 TYPE_LENGTH (type
));
21612 /* Symbols of this form are reasonably rare, so we just
21613 piggyback on the existing location code rather than writing
21614 a new implementation of symbol_computed_ops. */
21615 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21616 (*baton
)->per_cu
= cu
->per_cu
;
21617 gdb_assert ((*baton
)->per_cu
);
21619 (*baton
)->size
= 2 + cu_header
->addr_size
;
21620 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21621 (*baton
)->data
= data
;
21623 data
[0] = DW_OP_addr
;
21624 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21625 byte_order
, DW_ADDR (attr
));
21626 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21629 case DW_FORM_string
:
21632 case DW_FORM_GNU_str_index
:
21633 case DW_FORM_GNU_strp_alt
:
21634 /* DW_STRING is already allocated on the objfile obstack, point
21636 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21638 case DW_FORM_block1
:
21639 case DW_FORM_block2
:
21640 case DW_FORM_block4
:
21641 case DW_FORM_block
:
21642 case DW_FORM_exprloc
:
21643 case DW_FORM_data16
:
21644 blk
= DW_BLOCK (attr
);
21645 if (TYPE_LENGTH (type
) != blk
->size
)
21646 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21647 TYPE_LENGTH (type
));
21648 *bytes
= blk
->data
;
21651 /* The DW_AT_const_value attributes are supposed to carry the
21652 symbol's value "represented as it would be on the target
21653 architecture." By the time we get here, it's already been
21654 converted to host endianness, so we just need to sign- or
21655 zero-extend it as appropriate. */
21656 case DW_FORM_data1
:
21657 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21659 case DW_FORM_data2
:
21660 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21662 case DW_FORM_data4
:
21663 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21665 case DW_FORM_data8
:
21666 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21669 case DW_FORM_sdata
:
21670 case DW_FORM_implicit_const
:
21671 *value
= DW_SND (attr
);
21674 case DW_FORM_udata
:
21675 *value
= DW_UNSND (attr
);
21679 complaint (_("unsupported const value attribute form: '%s'"),
21680 dwarf_form_name (attr
->form
));
21687 /* Copy constant value from an attribute to a symbol. */
21690 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21691 struct dwarf2_cu
*cu
)
21693 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21695 const gdb_byte
*bytes
;
21696 struct dwarf2_locexpr_baton
*baton
;
21698 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21699 sym
->print_name (),
21700 &objfile
->objfile_obstack
, cu
,
21701 &value
, &bytes
, &baton
);
21705 SYMBOL_LOCATION_BATON (sym
) = baton
;
21706 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21708 else if (bytes
!= NULL
)
21710 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21711 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21715 SYMBOL_VALUE (sym
) = value
;
21716 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21720 /* Return the type of the die in question using its DW_AT_type attribute. */
21722 static struct type
*
21723 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21725 struct attribute
*type_attr
;
21727 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21730 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21731 /* A missing DW_AT_type represents a void type. */
21732 return objfile_type (objfile
)->builtin_void
;
21735 return lookup_die_type (die
, type_attr
, cu
);
21738 /* True iff CU's producer generates GNAT Ada auxiliary information
21739 that allows to find parallel types through that information instead
21740 of having to do expensive parallel lookups by type name. */
21743 need_gnat_info (struct dwarf2_cu
*cu
)
21745 /* Assume that the Ada compiler was GNAT, which always produces
21746 the auxiliary information. */
21747 return (cu
->language
== language_ada
);
21750 /* Return the auxiliary type of the die in question using its
21751 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21752 attribute is not present. */
21754 static struct type
*
21755 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21757 struct attribute
*type_attr
;
21759 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21763 return lookup_die_type (die
, type_attr
, cu
);
21766 /* If DIE has a descriptive_type attribute, then set the TYPE's
21767 descriptive type accordingly. */
21770 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21771 struct dwarf2_cu
*cu
)
21773 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21775 if (descriptive_type
)
21777 ALLOCATE_GNAT_AUX_TYPE (type
);
21778 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21782 /* Return the containing type of the die in question using its
21783 DW_AT_containing_type attribute. */
21785 static struct type
*
21786 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21788 struct attribute
*type_attr
;
21789 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21791 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21793 error (_("Dwarf Error: Problem turning containing type into gdb type "
21794 "[in module %s]"), objfile_name (objfile
));
21796 return lookup_die_type (die
, type_attr
, cu
);
21799 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21801 static struct type
*
21802 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21804 struct dwarf2_per_objfile
*dwarf2_per_objfile
21805 = cu
->per_cu
->dwarf2_per_objfile
;
21806 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21809 std::string message
21810 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21811 objfile_name (objfile
),
21812 sect_offset_str (cu
->header
.sect_off
),
21813 sect_offset_str (die
->sect_off
));
21814 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21816 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21819 /* Look up the type of DIE in CU using its type attribute ATTR.
21820 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21821 DW_AT_containing_type.
21822 If there is no type substitute an error marker. */
21824 static struct type
*
21825 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21826 struct dwarf2_cu
*cu
)
21828 struct dwarf2_per_objfile
*dwarf2_per_objfile
21829 = cu
->per_cu
->dwarf2_per_objfile
;
21830 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21831 struct type
*this_type
;
21833 gdb_assert (attr
->name
== DW_AT_type
21834 || attr
->name
== DW_AT_GNAT_descriptive_type
21835 || attr
->name
== DW_AT_containing_type
);
21837 /* First see if we have it cached. */
21839 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21841 struct dwarf2_per_cu_data
*per_cu
;
21842 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21844 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21845 dwarf2_per_objfile
);
21846 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21848 else if (attr
->form_is_ref ())
21850 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21852 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21854 else if (attr
->form
== DW_FORM_ref_sig8
)
21856 ULONGEST signature
= DW_SIGNATURE (attr
);
21858 return get_signatured_type (die
, signature
, cu
);
21862 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21863 " at %s [in module %s]"),
21864 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21865 objfile_name (objfile
));
21866 return build_error_marker_type (cu
, die
);
21869 /* If not cached we need to read it in. */
21871 if (this_type
== NULL
)
21873 struct die_info
*type_die
= NULL
;
21874 struct dwarf2_cu
*type_cu
= cu
;
21876 if (attr
->form_is_ref ())
21877 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21878 if (type_die
== NULL
)
21879 return build_error_marker_type (cu
, die
);
21880 /* If we find the type now, it's probably because the type came
21881 from an inter-CU reference and the type's CU got expanded before
21883 this_type
= read_type_die (type_die
, type_cu
);
21886 /* If we still don't have a type use an error marker. */
21888 if (this_type
== NULL
)
21889 return build_error_marker_type (cu
, die
);
21894 /* Return the type in DIE, CU.
21895 Returns NULL for invalid types.
21897 This first does a lookup in die_type_hash,
21898 and only reads the die in if necessary.
21900 NOTE: This can be called when reading in partial or full symbols. */
21902 static struct type
*
21903 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21905 struct type
*this_type
;
21907 this_type
= get_die_type (die
, cu
);
21911 return read_type_die_1 (die
, cu
);
21914 /* Read the type in DIE, CU.
21915 Returns NULL for invalid types. */
21917 static struct type
*
21918 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21920 struct type
*this_type
= NULL
;
21924 case DW_TAG_class_type
:
21925 case DW_TAG_interface_type
:
21926 case DW_TAG_structure_type
:
21927 case DW_TAG_union_type
:
21928 this_type
= read_structure_type (die
, cu
);
21930 case DW_TAG_enumeration_type
:
21931 this_type
= read_enumeration_type (die
, cu
);
21933 case DW_TAG_subprogram
:
21934 case DW_TAG_subroutine_type
:
21935 case DW_TAG_inlined_subroutine
:
21936 this_type
= read_subroutine_type (die
, cu
);
21938 case DW_TAG_array_type
:
21939 this_type
= read_array_type (die
, cu
);
21941 case DW_TAG_set_type
:
21942 this_type
= read_set_type (die
, cu
);
21944 case DW_TAG_pointer_type
:
21945 this_type
= read_tag_pointer_type (die
, cu
);
21947 case DW_TAG_ptr_to_member_type
:
21948 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21950 case DW_TAG_reference_type
:
21951 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21953 case DW_TAG_rvalue_reference_type
:
21954 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21956 case DW_TAG_const_type
:
21957 this_type
= read_tag_const_type (die
, cu
);
21959 case DW_TAG_volatile_type
:
21960 this_type
= read_tag_volatile_type (die
, cu
);
21962 case DW_TAG_restrict_type
:
21963 this_type
= read_tag_restrict_type (die
, cu
);
21965 case DW_TAG_string_type
:
21966 this_type
= read_tag_string_type (die
, cu
);
21968 case DW_TAG_typedef
:
21969 this_type
= read_typedef (die
, cu
);
21971 case DW_TAG_subrange_type
:
21972 this_type
= read_subrange_type (die
, cu
);
21974 case DW_TAG_base_type
:
21975 this_type
= read_base_type (die
, cu
);
21977 case DW_TAG_unspecified_type
:
21978 this_type
= read_unspecified_type (die
, cu
);
21980 case DW_TAG_namespace
:
21981 this_type
= read_namespace_type (die
, cu
);
21983 case DW_TAG_module
:
21984 this_type
= read_module_type (die
, cu
);
21986 case DW_TAG_atomic_type
:
21987 this_type
= read_tag_atomic_type (die
, cu
);
21990 complaint (_("unexpected tag in read_type_die: '%s'"),
21991 dwarf_tag_name (die
->tag
));
21998 /* See if we can figure out if the class lives in a namespace. We do
21999 this by looking for a member function; its demangled name will
22000 contain namespace info, if there is any.
22001 Return the computed name or NULL.
22002 Space for the result is allocated on the objfile's obstack.
22003 This is the full-die version of guess_partial_die_structure_name.
22004 In this case we know DIE has no useful parent. */
22006 static const char *
22007 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22009 struct die_info
*spec_die
;
22010 struct dwarf2_cu
*spec_cu
;
22011 struct die_info
*child
;
22012 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22015 spec_die
= die_specification (die
, &spec_cu
);
22016 if (spec_die
!= NULL
)
22022 for (child
= die
->child
;
22024 child
= child
->sibling
)
22026 if (child
->tag
== DW_TAG_subprogram
)
22028 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22030 if (linkage_name
!= NULL
)
22032 gdb::unique_xmalloc_ptr
<char> actual_name
22033 (language_class_name_from_physname (cu
->language_defn
,
22035 const char *name
= NULL
;
22037 if (actual_name
!= NULL
)
22039 const char *die_name
= dwarf2_name (die
, cu
);
22041 if (die_name
!= NULL
22042 && strcmp (die_name
, actual_name
.get ()) != 0)
22044 /* Strip off the class name from the full name.
22045 We want the prefix. */
22046 int die_name_len
= strlen (die_name
);
22047 int actual_name_len
= strlen (actual_name
.get ());
22048 const char *ptr
= actual_name
.get ();
22050 /* Test for '::' as a sanity check. */
22051 if (actual_name_len
> die_name_len
+ 2
22052 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
22053 name
= obstack_strndup (
22054 &objfile
->per_bfd
->storage_obstack
,
22055 ptr
, actual_name_len
- die_name_len
- 2);
22066 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22067 prefix part in such case. See
22068 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22070 static const char *
22071 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22073 struct attribute
*attr
;
22076 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22077 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22080 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22083 attr
= dw2_linkage_name_attr (die
, cu
);
22084 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22087 /* dwarf2_name had to be already called. */
22088 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22090 /* Strip the base name, keep any leading namespaces/classes. */
22091 base
= strrchr (DW_STRING (attr
), ':');
22092 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22095 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22096 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22098 &base
[-1] - DW_STRING (attr
));
22101 /* Return the name of the namespace/class that DIE is defined within,
22102 or "" if we can't tell. The caller should not xfree the result.
22104 For example, if we're within the method foo() in the following
22114 then determine_prefix on foo's die will return "N::C". */
22116 static const char *
22117 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22119 struct dwarf2_per_objfile
*dwarf2_per_objfile
22120 = cu
->per_cu
->dwarf2_per_objfile
;
22121 struct die_info
*parent
, *spec_die
;
22122 struct dwarf2_cu
*spec_cu
;
22123 struct type
*parent_type
;
22124 const char *retval
;
22126 if (cu
->language
!= language_cplus
22127 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22128 && cu
->language
!= language_rust
)
22131 retval
= anonymous_struct_prefix (die
, cu
);
22135 /* We have to be careful in the presence of DW_AT_specification.
22136 For example, with GCC 3.4, given the code
22140 // Definition of N::foo.
22144 then we'll have a tree of DIEs like this:
22146 1: DW_TAG_compile_unit
22147 2: DW_TAG_namespace // N
22148 3: DW_TAG_subprogram // declaration of N::foo
22149 4: DW_TAG_subprogram // definition of N::foo
22150 DW_AT_specification // refers to die #3
22152 Thus, when processing die #4, we have to pretend that we're in
22153 the context of its DW_AT_specification, namely the contex of die
22156 spec_die
= die_specification (die
, &spec_cu
);
22157 if (spec_die
== NULL
)
22158 parent
= die
->parent
;
22161 parent
= spec_die
->parent
;
22165 if (parent
== NULL
)
22167 else if (parent
->building_fullname
)
22170 const char *parent_name
;
22172 /* It has been seen on RealView 2.2 built binaries,
22173 DW_TAG_template_type_param types actually _defined_ as
22174 children of the parent class:
22177 template class <class Enum> Class{};
22178 Class<enum E> class_e;
22180 1: DW_TAG_class_type (Class)
22181 2: DW_TAG_enumeration_type (E)
22182 3: DW_TAG_enumerator (enum1:0)
22183 3: DW_TAG_enumerator (enum2:1)
22185 2: DW_TAG_template_type_param
22186 DW_AT_type DW_FORM_ref_udata (E)
22188 Besides being broken debug info, it can put GDB into an
22189 infinite loop. Consider:
22191 When we're building the full name for Class<E>, we'll start
22192 at Class, and go look over its template type parameters,
22193 finding E. We'll then try to build the full name of E, and
22194 reach here. We're now trying to build the full name of E,
22195 and look over the parent DIE for containing scope. In the
22196 broken case, if we followed the parent DIE of E, we'd again
22197 find Class, and once again go look at its template type
22198 arguments, etc., etc. Simply don't consider such parent die
22199 as source-level parent of this die (it can't be, the language
22200 doesn't allow it), and break the loop here. */
22201 name
= dwarf2_name (die
, cu
);
22202 parent_name
= dwarf2_name (parent
, cu
);
22203 complaint (_("template param type '%s' defined within parent '%s'"),
22204 name
? name
: "<unknown>",
22205 parent_name
? parent_name
: "<unknown>");
22209 switch (parent
->tag
)
22211 case DW_TAG_namespace
:
22212 parent_type
= read_type_die (parent
, cu
);
22213 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22214 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22215 Work around this problem here. */
22216 if (cu
->language
== language_cplus
22217 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22219 /* We give a name to even anonymous namespaces. */
22220 return TYPE_NAME (parent_type
);
22221 case DW_TAG_class_type
:
22222 case DW_TAG_interface_type
:
22223 case DW_TAG_structure_type
:
22224 case DW_TAG_union_type
:
22225 case DW_TAG_module
:
22226 parent_type
= read_type_die (parent
, cu
);
22227 if (TYPE_NAME (parent_type
) != NULL
)
22228 return TYPE_NAME (parent_type
);
22230 /* An anonymous structure is only allowed non-static data
22231 members; no typedefs, no member functions, et cetera.
22232 So it does not need a prefix. */
22234 case DW_TAG_compile_unit
:
22235 case DW_TAG_partial_unit
:
22236 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22237 if (cu
->language
== language_cplus
22238 && !dwarf2_per_objfile
->types
.empty ()
22239 && die
->child
!= NULL
22240 && (die
->tag
== DW_TAG_class_type
22241 || die
->tag
== DW_TAG_structure_type
22242 || die
->tag
== DW_TAG_union_type
))
22244 const char *name
= guess_full_die_structure_name (die
, cu
);
22249 case DW_TAG_subprogram
:
22250 /* Nested subroutines in Fortran get a prefix with the name
22251 of the parent's subroutine. */
22252 if (cu
->language
== language_fortran
)
22254 if ((die
->tag
== DW_TAG_subprogram
)
22255 && (dwarf2_name (parent
, cu
) != NULL
))
22256 return dwarf2_name (parent
, cu
);
22258 return determine_prefix (parent
, cu
);
22259 case DW_TAG_enumeration_type
:
22260 parent_type
= read_type_die (parent
, cu
);
22261 if (TYPE_DECLARED_CLASS (parent_type
))
22263 if (TYPE_NAME (parent_type
) != NULL
)
22264 return TYPE_NAME (parent_type
);
22267 /* Fall through. */
22269 return determine_prefix (parent
, cu
);
22273 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22274 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22275 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22276 an obconcat, otherwise allocate storage for the result. The CU argument is
22277 used to determine the language and hence, the appropriate separator. */
22279 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22282 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22283 int physname
, struct dwarf2_cu
*cu
)
22285 const char *lead
= "";
22288 if (suffix
== NULL
|| suffix
[0] == '\0'
22289 || prefix
== NULL
|| prefix
[0] == '\0')
22291 else if (cu
->language
== language_d
)
22293 /* For D, the 'main' function could be defined in any module, but it
22294 should never be prefixed. */
22295 if (strcmp (suffix
, "D main") == 0)
22303 else if (cu
->language
== language_fortran
&& physname
)
22305 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22306 DW_AT_MIPS_linkage_name is preferred and used instead. */
22314 if (prefix
== NULL
)
22316 if (suffix
== NULL
)
22323 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22325 strcpy (retval
, lead
);
22326 strcat (retval
, prefix
);
22327 strcat (retval
, sep
);
22328 strcat (retval
, suffix
);
22333 /* We have an obstack. */
22334 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22338 /* Return sibling of die, NULL if no sibling. */
22340 static struct die_info
*
22341 sibling_die (struct die_info
*die
)
22343 return die
->sibling
;
22346 /* Get name of a die, return NULL if not found. */
22348 static const char *
22349 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22350 struct obstack
*obstack
)
22352 if (name
&& cu
->language
== language_cplus
)
22354 std::string canon_name
= cp_canonicalize_string (name
);
22356 if (!canon_name
.empty ())
22358 if (canon_name
!= name
)
22359 name
= obstack_strdup (obstack
, canon_name
);
22366 /* Get name of a die, return NULL if not found.
22367 Anonymous namespaces are converted to their magic string. */
22369 static const char *
22370 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22372 struct attribute
*attr
;
22373 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22375 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22376 if ((!attr
|| !DW_STRING (attr
))
22377 && die
->tag
!= DW_TAG_namespace
22378 && die
->tag
!= DW_TAG_class_type
22379 && die
->tag
!= DW_TAG_interface_type
22380 && die
->tag
!= DW_TAG_structure_type
22381 && die
->tag
!= DW_TAG_union_type
)
22386 case DW_TAG_compile_unit
:
22387 case DW_TAG_partial_unit
:
22388 /* Compilation units have a DW_AT_name that is a filename, not
22389 a source language identifier. */
22390 case DW_TAG_enumeration_type
:
22391 case DW_TAG_enumerator
:
22392 /* These tags always have simple identifiers already; no need
22393 to canonicalize them. */
22394 return DW_STRING (attr
);
22396 case DW_TAG_namespace
:
22397 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22398 return DW_STRING (attr
);
22399 return CP_ANONYMOUS_NAMESPACE_STR
;
22401 case DW_TAG_class_type
:
22402 case DW_TAG_interface_type
:
22403 case DW_TAG_structure_type
:
22404 case DW_TAG_union_type
:
22405 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22406 structures or unions. These were of the form "._%d" in GCC 4.1,
22407 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22408 and GCC 4.4. We work around this problem by ignoring these. */
22409 if (attr
&& DW_STRING (attr
)
22410 && (startswith (DW_STRING (attr
), "._")
22411 || startswith (DW_STRING (attr
), "<anonymous")))
22414 /* GCC might emit a nameless typedef that has a linkage name. See
22415 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22416 if (!attr
|| DW_STRING (attr
) == NULL
)
22418 attr
= dw2_linkage_name_attr (die
, cu
);
22419 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22422 /* Avoid demangling DW_STRING (attr) the second time on a second
22423 call for the same DIE. */
22424 if (!DW_STRING_IS_CANONICAL (attr
))
22426 gdb::unique_xmalloc_ptr
<char> demangled
22427 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
22431 /* FIXME: we already did this for the partial symbol... */
22433 = obstack_strdup (&objfile
->per_bfd
->storage_obstack
,
22435 DW_STRING_IS_CANONICAL (attr
) = 1;
22437 /* Strip any leading namespaces/classes, keep only the base name.
22438 DW_AT_name for named DIEs does not contain the prefixes. */
22439 base
= strrchr (DW_STRING (attr
), ':');
22440 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22443 return DW_STRING (attr
);
22452 if (!DW_STRING_IS_CANONICAL (attr
))
22455 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22456 &objfile
->per_bfd
->storage_obstack
);
22457 DW_STRING_IS_CANONICAL (attr
) = 1;
22459 return DW_STRING (attr
);
22462 /* Return the die that this die in an extension of, or NULL if there
22463 is none. *EXT_CU is the CU containing DIE on input, and the CU
22464 containing the return value on output. */
22466 static struct die_info
*
22467 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22469 struct attribute
*attr
;
22471 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22475 return follow_die_ref (die
, attr
, ext_cu
);
22478 /* A convenience function that returns an "unknown" DWARF name,
22479 including the value of V. STR is the name of the entity being
22480 printed, e.g., "TAG". */
22482 static const char *
22483 dwarf_unknown (const char *str
, unsigned v
)
22485 char *cell
= get_print_cell ();
22486 xsnprintf (cell
, PRINT_CELL_SIZE
, "DW_%s_<unknown: %u>", str
, v
);
22490 /* Convert a DIE tag into its string name. */
22492 static const char *
22493 dwarf_tag_name (unsigned tag
)
22495 const char *name
= get_DW_TAG_name (tag
);
22498 return dwarf_unknown ("TAG", tag
);
22503 /* Convert a DWARF attribute code into its string name. */
22505 static const char *
22506 dwarf_attr_name (unsigned attr
)
22510 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22511 if (attr
== DW_AT_MIPS_fde
)
22512 return "DW_AT_MIPS_fde";
22514 if (attr
== DW_AT_HP_block_index
)
22515 return "DW_AT_HP_block_index";
22518 name
= get_DW_AT_name (attr
);
22521 return dwarf_unknown ("AT", attr
);
22526 /* Convert a unit type to corresponding DW_UT name. */
22528 static const char *
22529 dwarf_unit_type_name (int unit_type
) {
22533 return "DW_UT_compile (0x01)";
22535 return "DW_UT_type (0x02)";
22537 return "DW_UT_partial (0x03)";
22539 return "DW_UT_skeleton (0x04)";
22541 return "DW_UT_split_compile (0x05)";
22543 return "DW_UT_split_type (0x06)";
22545 return "DW_UT_lo_user (0x80)";
22547 return "DW_UT_hi_user (0xff)";
22553 /* Convert a DWARF value form code into its string name. */
22555 static const char *
22556 dwarf_form_name (unsigned form
)
22558 const char *name
= get_DW_FORM_name (form
);
22561 return dwarf_unknown ("FORM", form
);
22566 static const char *
22567 dwarf_bool_name (unsigned mybool
)
22575 /* Convert a DWARF type code into its string name. */
22577 static const char *
22578 dwarf_type_encoding_name (unsigned enc
)
22580 const char *name
= get_DW_ATE_name (enc
);
22583 return dwarf_unknown ("ATE", enc
);
22589 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22593 print_spaces (indent
, f
);
22594 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22595 dwarf_tag_name (die
->tag
), die
->abbrev
,
22596 sect_offset_str (die
->sect_off
));
22598 if (die
->parent
!= NULL
)
22600 print_spaces (indent
, f
);
22601 fprintf_unfiltered (f
, " parent at offset: %s\n",
22602 sect_offset_str (die
->parent
->sect_off
));
22605 print_spaces (indent
, f
);
22606 fprintf_unfiltered (f
, " has children: %s\n",
22607 dwarf_bool_name (die
->child
!= NULL
));
22609 print_spaces (indent
, f
);
22610 fprintf_unfiltered (f
, " attributes:\n");
22612 for (i
= 0; i
< die
->num_attrs
; ++i
)
22614 print_spaces (indent
, f
);
22615 fprintf_unfiltered (f
, " %s (%s) ",
22616 dwarf_attr_name (die
->attrs
[i
].name
),
22617 dwarf_form_name (die
->attrs
[i
].form
));
22619 switch (die
->attrs
[i
].form
)
22622 case DW_FORM_addrx
:
22623 case DW_FORM_GNU_addr_index
:
22624 fprintf_unfiltered (f
, "address: ");
22625 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22627 case DW_FORM_block2
:
22628 case DW_FORM_block4
:
22629 case DW_FORM_block
:
22630 case DW_FORM_block1
:
22631 fprintf_unfiltered (f
, "block: size %s",
22632 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22634 case DW_FORM_exprloc
:
22635 fprintf_unfiltered (f
, "expression: size %s",
22636 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22638 case DW_FORM_data16
:
22639 fprintf_unfiltered (f
, "constant of 16 bytes");
22641 case DW_FORM_ref_addr
:
22642 fprintf_unfiltered (f
, "ref address: ");
22643 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22645 case DW_FORM_GNU_ref_alt
:
22646 fprintf_unfiltered (f
, "alt ref address: ");
22647 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22653 case DW_FORM_ref_udata
:
22654 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22655 (long) (DW_UNSND (&die
->attrs
[i
])));
22657 case DW_FORM_data1
:
22658 case DW_FORM_data2
:
22659 case DW_FORM_data4
:
22660 case DW_FORM_data8
:
22661 case DW_FORM_udata
:
22662 case DW_FORM_sdata
:
22663 fprintf_unfiltered (f
, "constant: %s",
22664 pulongest (DW_UNSND (&die
->attrs
[i
])));
22666 case DW_FORM_sec_offset
:
22667 fprintf_unfiltered (f
, "section offset: %s",
22668 pulongest (DW_UNSND (&die
->attrs
[i
])));
22670 case DW_FORM_ref_sig8
:
22671 fprintf_unfiltered (f
, "signature: %s",
22672 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22674 case DW_FORM_string
:
22676 case DW_FORM_line_strp
:
22678 case DW_FORM_GNU_str_index
:
22679 case DW_FORM_GNU_strp_alt
:
22680 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22681 DW_STRING (&die
->attrs
[i
])
22682 ? DW_STRING (&die
->attrs
[i
]) : "",
22683 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22686 if (DW_UNSND (&die
->attrs
[i
]))
22687 fprintf_unfiltered (f
, "flag: TRUE");
22689 fprintf_unfiltered (f
, "flag: FALSE");
22691 case DW_FORM_flag_present
:
22692 fprintf_unfiltered (f
, "flag: TRUE");
22694 case DW_FORM_indirect
:
22695 /* The reader will have reduced the indirect form to
22696 the "base form" so this form should not occur. */
22697 fprintf_unfiltered (f
,
22698 "unexpected attribute form: DW_FORM_indirect");
22700 case DW_FORM_implicit_const
:
22701 fprintf_unfiltered (f
, "constant: %s",
22702 plongest (DW_SND (&die
->attrs
[i
])));
22705 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22706 die
->attrs
[i
].form
);
22709 fprintf_unfiltered (f
, "\n");
22714 dump_die_for_error (struct die_info
*die
)
22716 dump_die_shallow (gdb_stderr
, 0, die
);
22720 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22722 int indent
= level
* 4;
22724 gdb_assert (die
!= NULL
);
22726 if (level
>= max_level
)
22729 dump_die_shallow (f
, indent
, die
);
22731 if (die
->child
!= NULL
)
22733 print_spaces (indent
, f
);
22734 fprintf_unfiltered (f
, " Children:");
22735 if (level
+ 1 < max_level
)
22737 fprintf_unfiltered (f
, "\n");
22738 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22742 fprintf_unfiltered (f
,
22743 " [not printed, max nesting level reached]\n");
22747 if (die
->sibling
!= NULL
&& level
> 0)
22749 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22753 /* This is called from the pdie macro in gdbinit.in.
22754 It's not static so gcc will keep a copy callable from gdb. */
22757 dump_die (struct die_info
*die
, int max_level
)
22759 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22763 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22767 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22768 to_underlying (die
->sect_off
),
22774 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22778 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22780 if (attr
->form_is_ref ())
22781 return (sect_offset
) DW_UNSND (attr
);
22783 complaint (_("unsupported die ref attribute form: '%s'"),
22784 dwarf_form_name (attr
->form
));
22788 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22789 * the value held by the attribute is not constant. */
22792 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22794 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22795 return DW_SND (attr
);
22796 else if (attr
->form
== DW_FORM_udata
22797 || attr
->form
== DW_FORM_data1
22798 || attr
->form
== DW_FORM_data2
22799 || attr
->form
== DW_FORM_data4
22800 || attr
->form
== DW_FORM_data8
)
22801 return DW_UNSND (attr
);
22804 /* For DW_FORM_data16 see attribute::form_is_constant. */
22805 complaint (_("Attribute value is not a constant (%s)"),
22806 dwarf_form_name (attr
->form
));
22807 return default_value
;
22811 /* Follow reference or signature attribute ATTR of SRC_DIE.
22812 On entry *REF_CU is the CU of SRC_DIE.
22813 On exit *REF_CU is the CU of the result. */
22815 static struct die_info
*
22816 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22817 struct dwarf2_cu
**ref_cu
)
22819 struct die_info
*die
;
22821 if (attr
->form_is_ref ())
22822 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22823 else if (attr
->form
== DW_FORM_ref_sig8
)
22824 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22827 dump_die_for_error (src_die
);
22828 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22829 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22835 /* Follow reference OFFSET.
22836 On entry *REF_CU is the CU of the source die referencing OFFSET.
22837 On exit *REF_CU is the CU of the result.
22838 Returns NULL if OFFSET is invalid. */
22840 static struct die_info
*
22841 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22842 struct dwarf2_cu
**ref_cu
)
22844 struct die_info temp_die
;
22845 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22846 struct dwarf2_per_objfile
*dwarf2_per_objfile
22847 = cu
->per_cu
->dwarf2_per_objfile
;
22849 gdb_assert (cu
->per_cu
!= NULL
);
22853 if (cu
->per_cu
->is_debug_types
)
22855 /* .debug_types CUs cannot reference anything outside their CU.
22856 If they need to, they have to reference a signatured type via
22857 DW_FORM_ref_sig8. */
22858 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22861 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22862 || !offset_in_cu_p (&cu
->header
, sect_off
))
22864 struct dwarf2_per_cu_data
*per_cu
;
22866 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22867 dwarf2_per_objfile
);
22869 /* If necessary, add it to the queue and load its DIEs. */
22870 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22871 load_full_comp_unit (per_cu
, false, cu
->language
);
22873 target_cu
= per_cu
->cu
;
22875 else if (cu
->dies
== NULL
)
22877 /* We're loading full DIEs during partial symbol reading. */
22878 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22879 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22882 *ref_cu
= target_cu
;
22883 temp_die
.sect_off
= sect_off
;
22885 if (target_cu
!= cu
)
22886 target_cu
->ancestor
= cu
;
22888 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22890 to_underlying (sect_off
));
22893 /* Follow reference attribute ATTR of SRC_DIE.
22894 On entry *REF_CU is the CU of SRC_DIE.
22895 On exit *REF_CU is the CU of the result. */
22897 static struct die_info
*
22898 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22899 struct dwarf2_cu
**ref_cu
)
22901 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22902 struct dwarf2_cu
*cu
= *ref_cu
;
22903 struct die_info
*die
;
22905 die
= follow_die_offset (sect_off
,
22906 (attr
->form
== DW_FORM_GNU_ref_alt
22907 || cu
->per_cu
->is_dwz
),
22910 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22911 "at %s [in module %s]"),
22912 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22913 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22918 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22919 Returned value is intended for DW_OP_call*. Returned
22920 dwarf2_locexpr_baton->data has lifetime of
22921 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22923 struct dwarf2_locexpr_baton
22924 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22925 struct dwarf2_per_cu_data
*per_cu
,
22926 CORE_ADDR (*get_frame_pc
) (void *baton
),
22927 void *baton
, bool resolve_abstract_p
)
22929 struct dwarf2_cu
*cu
;
22930 struct die_info
*die
;
22931 struct attribute
*attr
;
22932 struct dwarf2_locexpr_baton retval
;
22933 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22934 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22936 if (per_cu
->cu
== NULL
)
22937 load_cu (per_cu
, false);
22941 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22942 Instead just throw an error, not much else we can do. */
22943 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22944 sect_offset_str (sect_off
), objfile_name (objfile
));
22947 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22949 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22950 sect_offset_str (sect_off
), objfile_name (objfile
));
22952 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22953 if (!attr
&& resolve_abstract_p
22954 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22955 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22957 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22958 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22959 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
22961 for (const auto &cand_off
22962 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22964 struct dwarf2_cu
*cand_cu
= cu
;
22965 struct die_info
*cand
22966 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22969 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22972 CORE_ADDR pc_low
, pc_high
;
22973 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22974 if (pc_low
== ((CORE_ADDR
) -1))
22976 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22977 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22978 if (!(pc_low
<= pc
&& pc
< pc_high
))
22982 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22989 /* DWARF: "If there is no such attribute, then there is no effect.".
22990 DATA is ignored if SIZE is 0. */
22992 retval
.data
= NULL
;
22995 else if (attr
->form_is_section_offset ())
22997 struct dwarf2_loclist_baton loclist_baton
;
22998 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23001 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23003 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23005 retval
.size
= size
;
23009 if (!attr
->form_is_block ())
23010 error (_("Dwarf Error: DIE at %s referenced in module %s "
23011 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23012 sect_offset_str (sect_off
), objfile_name (objfile
));
23014 retval
.data
= DW_BLOCK (attr
)->data
;
23015 retval
.size
= DW_BLOCK (attr
)->size
;
23017 retval
.per_cu
= cu
->per_cu
;
23019 age_cached_comp_units (dwarf2_per_objfile
);
23024 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23027 struct dwarf2_locexpr_baton
23028 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23029 struct dwarf2_per_cu_data
*per_cu
,
23030 CORE_ADDR (*get_frame_pc
) (void *baton
),
23033 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23035 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23038 /* Write a constant of a given type as target-ordered bytes into
23041 static const gdb_byte
*
23042 write_constant_as_bytes (struct obstack
*obstack
,
23043 enum bfd_endian byte_order
,
23050 *len
= TYPE_LENGTH (type
);
23051 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23052 store_unsigned_integer (result
, *len
, byte_order
, value
);
23057 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23058 pointer to the constant bytes and set LEN to the length of the
23059 data. If memory is needed, allocate it on OBSTACK. If the DIE
23060 does not have a DW_AT_const_value, return NULL. */
23063 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23064 struct dwarf2_per_cu_data
*per_cu
,
23065 struct obstack
*obstack
,
23068 struct dwarf2_cu
*cu
;
23069 struct die_info
*die
;
23070 struct attribute
*attr
;
23071 const gdb_byte
*result
= NULL
;
23074 enum bfd_endian byte_order
;
23075 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23077 if (per_cu
->cu
== NULL
)
23078 load_cu (per_cu
, false);
23082 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23083 Instead just throw an error, not much else we can do. */
23084 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23085 sect_offset_str (sect_off
), objfile_name (objfile
));
23088 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23090 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23091 sect_offset_str (sect_off
), objfile_name (objfile
));
23093 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23097 byte_order
= (bfd_big_endian (objfile
->obfd
)
23098 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23100 switch (attr
->form
)
23103 case DW_FORM_addrx
:
23104 case DW_FORM_GNU_addr_index
:
23108 *len
= cu
->header
.addr_size
;
23109 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23110 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23114 case DW_FORM_string
:
23117 case DW_FORM_GNU_str_index
:
23118 case DW_FORM_GNU_strp_alt
:
23119 /* DW_STRING is already allocated on the objfile obstack, point
23121 result
= (const gdb_byte
*) DW_STRING (attr
);
23122 *len
= strlen (DW_STRING (attr
));
23124 case DW_FORM_block1
:
23125 case DW_FORM_block2
:
23126 case DW_FORM_block4
:
23127 case DW_FORM_block
:
23128 case DW_FORM_exprloc
:
23129 case DW_FORM_data16
:
23130 result
= DW_BLOCK (attr
)->data
;
23131 *len
= DW_BLOCK (attr
)->size
;
23134 /* The DW_AT_const_value attributes are supposed to carry the
23135 symbol's value "represented as it would be on the target
23136 architecture." By the time we get here, it's already been
23137 converted to host endianness, so we just need to sign- or
23138 zero-extend it as appropriate. */
23139 case DW_FORM_data1
:
23140 type
= die_type (die
, cu
);
23141 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23142 if (result
== NULL
)
23143 result
= write_constant_as_bytes (obstack
, byte_order
,
23146 case DW_FORM_data2
:
23147 type
= die_type (die
, cu
);
23148 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23149 if (result
== NULL
)
23150 result
= write_constant_as_bytes (obstack
, byte_order
,
23153 case DW_FORM_data4
:
23154 type
= die_type (die
, cu
);
23155 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23156 if (result
== NULL
)
23157 result
= write_constant_as_bytes (obstack
, byte_order
,
23160 case DW_FORM_data8
:
23161 type
= die_type (die
, cu
);
23162 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23163 if (result
== NULL
)
23164 result
= write_constant_as_bytes (obstack
, byte_order
,
23168 case DW_FORM_sdata
:
23169 case DW_FORM_implicit_const
:
23170 type
= die_type (die
, cu
);
23171 result
= write_constant_as_bytes (obstack
, byte_order
,
23172 type
, DW_SND (attr
), len
);
23175 case DW_FORM_udata
:
23176 type
= die_type (die
, cu
);
23177 result
= write_constant_as_bytes (obstack
, byte_order
,
23178 type
, DW_UNSND (attr
), len
);
23182 complaint (_("unsupported const value attribute form: '%s'"),
23183 dwarf_form_name (attr
->form
));
23190 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23191 valid type for this die is found. */
23194 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23195 struct dwarf2_per_cu_data
*per_cu
)
23197 struct dwarf2_cu
*cu
;
23198 struct die_info
*die
;
23200 if (per_cu
->cu
== NULL
)
23201 load_cu (per_cu
, false);
23206 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23210 return die_type (die
, cu
);
23213 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23217 dwarf2_get_die_type (cu_offset die_offset
,
23218 struct dwarf2_per_cu_data
*per_cu
)
23220 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23221 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23224 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23225 On entry *REF_CU is the CU of SRC_DIE.
23226 On exit *REF_CU is the CU of the result.
23227 Returns NULL if the referenced DIE isn't found. */
23229 static struct die_info
*
23230 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23231 struct dwarf2_cu
**ref_cu
)
23233 struct die_info temp_die
;
23234 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23235 struct die_info
*die
;
23237 /* While it might be nice to assert sig_type->type == NULL here,
23238 we can get here for DW_AT_imported_declaration where we need
23239 the DIE not the type. */
23241 /* If necessary, add it to the queue and load its DIEs. */
23243 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23244 read_signatured_type (sig_type
);
23246 sig_cu
= sig_type
->per_cu
.cu
;
23247 gdb_assert (sig_cu
!= NULL
);
23248 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23249 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23250 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23251 to_underlying (temp_die
.sect_off
));
23254 struct dwarf2_per_objfile
*dwarf2_per_objfile
23255 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23257 /* For .gdb_index version 7 keep track of included TUs.
23258 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23259 if (dwarf2_per_objfile
->index_table
!= NULL
23260 && dwarf2_per_objfile
->index_table
->version
<= 7)
23262 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
23267 sig_cu
->ancestor
= cu
;
23275 /* Follow signatured type referenced by ATTR in SRC_DIE.
23276 On entry *REF_CU is the CU of SRC_DIE.
23277 On exit *REF_CU is the CU of the result.
23278 The result is the DIE of the type.
23279 If the referenced type cannot be found an error is thrown. */
23281 static struct die_info
*
23282 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23283 struct dwarf2_cu
**ref_cu
)
23285 ULONGEST signature
= DW_SIGNATURE (attr
);
23286 struct signatured_type
*sig_type
;
23287 struct die_info
*die
;
23289 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23291 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23292 /* sig_type will be NULL if the signatured type is missing from
23294 if (sig_type
== NULL
)
23296 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23297 " from DIE at %s [in module %s]"),
23298 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23299 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23302 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23305 dump_die_for_error (src_die
);
23306 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23307 " from DIE at %s [in module %s]"),
23308 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23309 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23315 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23316 reading in and processing the type unit if necessary. */
23318 static struct type
*
23319 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23320 struct dwarf2_cu
*cu
)
23322 struct dwarf2_per_objfile
*dwarf2_per_objfile
23323 = cu
->per_cu
->dwarf2_per_objfile
;
23324 struct signatured_type
*sig_type
;
23325 struct dwarf2_cu
*type_cu
;
23326 struct die_info
*type_die
;
23329 sig_type
= lookup_signatured_type (cu
, signature
);
23330 /* sig_type will be NULL if the signatured type is missing from
23332 if (sig_type
== NULL
)
23334 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23335 " from DIE at %s [in module %s]"),
23336 hex_string (signature
), sect_offset_str (die
->sect_off
),
23337 objfile_name (dwarf2_per_objfile
->objfile
));
23338 return build_error_marker_type (cu
, die
);
23341 /* If we already know the type we're done. */
23342 if (sig_type
->type
!= NULL
)
23343 return sig_type
->type
;
23346 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23347 if (type_die
!= NULL
)
23349 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23350 is created. This is important, for example, because for c++ classes
23351 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23352 type
= read_type_die (type_die
, type_cu
);
23355 complaint (_("Dwarf Error: Cannot build signatured type %s"
23356 " referenced from DIE at %s [in module %s]"),
23357 hex_string (signature
), sect_offset_str (die
->sect_off
),
23358 objfile_name (dwarf2_per_objfile
->objfile
));
23359 type
= build_error_marker_type (cu
, die
);
23364 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23365 " from DIE at %s [in module %s]"),
23366 hex_string (signature
), sect_offset_str (die
->sect_off
),
23367 objfile_name (dwarf2_per_objfile
->objfile
));
23368 type
= build_error_marker_type (cu
, die
);
23370 sig_type
->type
= type
;
23375 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23376 reading in and processing the type unit if necessary. */
23378 static struct type
*
23379 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23380 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23382 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23383 if (attr
->form_is_ref ())
23385 struct dwarf2_cu
*type_cu
= cu
;
23386 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23388 return read_type_die (type_die
, type_cu
);
23390 else if (attr
->form
== DW_FORM_ref_sig8
)
23392 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23396 struct dwarf2_per_objfile
*dwarf2_per_objfile
23397 = cu
->per_cu
->dwarf2_per_objfile
;
23399 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23400 " at %s [in module %s]"),
23401 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23402 objfile_name (dwarf2_per_objfile
->objfile
));
23403 return build_error_marker_type (cu
, die
);
23407 /* Load the DIEs associated with type unit PER_CU into memory. */
23410 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23412 struct signatured_type
*sig_type
;
23414 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23415 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23417 /* We have the per_cu, but we need the signatured_type.
23418 Fortunately this is an easy translation. */
23419 gdb_assert (per_cu
->is_debug_types
);
23420 sig_type
= (struct signatured_type
*) per_cu
;
23422 gdb_assert (per_cu
->cu
== NULL
);
23424 read_signatured_type (sig_type
);
23426 gdb_assert (per_cu
->cu
!= NULL
);
23429 /* Read in a signatured type and build its CU and DIEs.
23430 If the type is a stub for the real type in a DWO file,
23431 read in the real type from the DWO file as well. */
23434 read_signatured_type (struct signatured_type
*sig_type
)
23436 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23438 gdb_assert (per_cu
->is_debug_types
);
23439 gdb_assert (per_cu
->cu
== NULL
);
23441 cutu_reader
reader (per_cu
, NULL
, 0, 1, false);
23443 if (!reader
.dummy_p
)
23445 struct dwarf2_cu
*cu
= reader
.cu
;
23446 const gdb_byte
*info_ptr
= reader
.info_ptr
;
23448 gdb_assert (cu
->die_hash
== NULL
);
23450 htab_create_alloc_ex (cu
->header
.length
/ 12,
23454 &cu
->comp_unit_obstack
,
23455 hashtab_obstack_allocate
,
23456 dummy_obstack_deallocate
);
23458 if (reader
.comp_unit_die
->has_children
)
23459 reader
.comp_unit_die
->child
23460 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
23461 reader
.comp_unit_die
);
23462 cu
->dies
= reader
.comp_unit_die
;
23463 /* comp_unit_die is not stored in die_hash, no need. */
23465 /* We try not to read any attributes in this function, because
23466 not all CUs needed for references have been loaded yet, and
23467 symbol table processing isn't initialized. But we have to
23468 set the CU language, or we won't be able to build types
23469 correctly. Similarly, if we do not read the producer, we can
23470 not apply producer-specific interpretation. */
23471 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23474 sig_type
->per_cu
.tu_read
= 1;
23477 /* Decode simple location descriptions.
23478 Given a pointer to a dwarf block that defines a location, compute
23479 the location and return the value.
23481 NOTE drow/2003-11-18: This function is called in two situations
23482 now: for the address of static or global variables (partial symbols
23483 only) and for offsets into structures which are expected to be
23484 (more or less) constant. The partial symbol case should go away,
23485 and only the constant case should remain. That will let this
23486 function complain more accurately. A few special modes are allowed
23487 without complaint for global variables (for instance, global
23488 register values and thread-local values).
23490 A location description containing no operations indicates that the
23491 object is optimized out. The return value is 0 for that case.
23492 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23493 callers will only want a very basic result and this can become a
23496 Note that stack[0] is unused except as a default error return. */
23499 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23501 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23503 size_t size
= blk
->size
;
23504 const gdb_byte
*data
= blk
->data
;
23505 CORE_ADDR stack
[64];
23507 unsigned int bytes_read
, unsnd
;
23513 stack
[++stacki
] = 0;
23552 stack
[++stacki
] = op
- DW_OP_lit0
;
23587 stack
[++stacki
] = op
- DW_OP_reg0
;
23589 dwarf2_complex_location_expr_complaint ();
23593 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23595 stack
[++stacki
] = unsnd
;
23597 dwarf2_complex_location_expr_complaint ();
23601 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23606 case DW_OP_const1u
:
23607 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23611 case DW_OP_const1s
:
23612 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23616 case DW_OP_const2u
:
23617 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23621 case DW_OP_const2s
:
23622 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23626 case DW_OP_const4u
:
23627 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23631 case DW_OP_const4s
:
23632 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23636 case DW_OP_const8u
:
23637 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23642 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23648 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23653 stack
[stacki
+ 1] = stack
[stacki
];
23658 stack
[stacki
- 1] += stack
[stacki
];
23662 case DW_OP_plus_uconst
:
23663 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23669 stack
[stacki
- 1] -= stack
[stacki
];
23674 /* If we're not the last op, then we definitely can't encode
23675 this using GDB's address_class enum. This is valid for partial
23676 global symbols, although the variable's address will be bogus
23679 dwarf2_complex_location_expr_complaint ();
23682 case DW_OP_GNU_push_tls_address
:
23683 case DW_OP_form_tls_address
:
23684 /* The top of the stack has the offset from the beginning
23685 of the thread control block at which the variable is located. */
23686 /* Nothing should follow this operator, so the top of stack would
23688 /* This is valid for partial global symbols, but the variable's
23689 address will be bogus in the psymtab. Make it always at least
23690 non-zero to not look as a variable garbage collected by linker
23691 which have DW_OP_addr 0. */
23693 dwarf2_complex_location_expr_complaint ();
23697 case DW_OP_GNU_uninit
:
23701 case DW_OP_GNU_addr_index
:
23702 case DW_OP_GNU_const_index
:
23703 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23710 const char *name
= get_DW_OP_name (op
);
23713 complaint (_("unsupported stack op: '%s'"),
23716 complaint (_("unsupported stack op: '%02x'"),
23720 return (stack
[stacki
]);
23723 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23724 outside of the allocated space. Also enforce minimum>0. */
23725 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23727 complaint (_("location description stack overflow"));
23733 complaint (_("location description stack underflow"));
23737 return (stack
[stacki
]);
23740 /* memory allocation interface */
23742 static struct dwarf_block
*
23743 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23745 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23748 static struct die_info
*
23749 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23751 struct die_info
*die
;
23752 size_t size
= sizeof (struct die_info
);
23755 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23757 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23758 memset (die
, 0, sizeof (struct die_info
));
23763 /* Macro support. */
23765 /* Return file name relative to the compilation directory of file number I in
23766 *LH's file name table. The result is allocated using xmalloc; the caller is
23767 responsible for freeing it. */
23770 file_file_name (int file
, struct line_header
*lh
)
23772 /* Is the file number a valid index into the line header's file name
23773 table? Remember that file numbers start with one, not zero. */
23774 if (lh
->is_valid_file_index (file
))
23776 const file_entry
*fe
= lh
->file_name_at (file
);
23778 if (!IS_ABSOLUTE_PATH (fe
->name
))
23780 const char *dir
= fe
->include_dir (lh
);
23782 return concat (dir
, SLASH_STRING
, fe
->name
, (char *) NULL
);
23784 return xstrdup (fe
->name
);
23788 /* The compiler produced a bogus file number. We can at least
23789 record the macro definitions made in the file, even if we
23790 won't be able to find the file by name. */
23791 char fake_name
[80];
23793 xsnprintf (fake_name
, sizeof (fake_name
),
23794 "<bad macro file number %d>", file
);
23796 complaint (_("bad file number in macro information (%d)"),
23799 return xstrdup (fake_name
);
23803 /* Return the full name of file number I in *LH's file name table.
23804 Use COMP_DIR as the name of the current directory of the
23805 compilation. The result is allocated using xmalloc; the caller is
23806 responsible for freeing it. */
23808 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23810 /* Is the file number a valid index into the line header's file name
23811 table? Remember that file numbers start with one, not zero. */
23812 if (lh
->is_valid_file_index (file
))
23814 char *relative
= file_file_name (file
, lh
);
23816 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23818 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23819 relative
, (char *) NULL
);
23822 return file_file_name (file
, lh
);
23826 static struct macro_source_file
*
23827 macro_start_file (struct dwarf2_cu
*cu
,
23828 int file
, int line
,
23829 struct macro_source_file
*current_file
,
23830 struct line_header
*lh
)
23832 /* File name relative to the compilation directory of this source file. */
23833 char *file_name
= file_file_name (file
, lh
);
23835 if (! current_file
)
23837 /* Note: We don't create a macro table for this compilation unit
23838 at all until we actually get a filename. */
23839 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
23841 /* If we have no current file, then this must be the start_file
23842 directive for the compilation unit's main source file. */
23843 current_file
= macro_set_main (macro_table
, file_name
);
23844 macro_define_special (macro_table
);
23847 current_file
= macro_include (current_file
, line
, file_name
);
23851 return current_file
;
23854 static const char *
23855 consume_improper_spaces (const char *p
, const char *body
)
23859 complaint (_("macro definition contains spaces "
23860 "in formal argument list:\n`%s'"),
23872 parse_macro_definition (struct macro_source_file
*file
, int line
,
23877 /* The body string takes one of two forms. For object-like macro
23878 definitions, it should be:
23880 <macro name> " " <definition>
23882 For function-like macro definitions, it should be:
23884 <macro name> "() " <definition>
23886 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23888 Spaces may appear only where explicitly indicated, and in the
23891 The Dwarf 2 spec says that an object-like macro's name is always
23892 followed by a space, but versions of GCC around March 2002 omit
23893 the space when the macro's definition is the empty string.
23895 The Dwarf 2 spec says that there should be no spaces between the
23896 formal arguments in a function-like macro's formal argument list,
23897 but versions of GCC around March 2002 include spaces after the
23901 /* Find the extent of the macro name. The macro name is terminated
23902 by either a space or null character (for an object-like macro) or
23903 an opening paren (for a function-like macro). */
23904 for (p
= body
; *p
; p
++)
23905 if (*p
== ' ' || *p
== '(')
23908 if (*p
== ' ' || *p
== '\0')
23910 /* It's an object-like macro. */
23911 int name_len
= p
- body
;
23912 std::string
name (body
, name_len
);
23913 const char *replacement
;
23916 replacement
= body
+ name_len
+ 1;
23919 dwarf2_macro_malformed_definition_complaint (body
);
23920 replacement
= body
+ name_len
;
23923 macro_define_object (file
, line
, name
.c_str (), replacement
);
23925 else if (*p
== '(')
23927 /* It's a function-like macro. */
23928 std::string
name (body
, p
- body
);
23931 char **argv
= XNEWVEC (char *, argv_size
);
23935 p
= consume_improper_spaces (p
, body
);
23937 /* Parse the formal argument list. */
23938 while (*p
&& *p
!= ')')
23940 /* Find the extent of the current argument name. */
23941 const char *arg_start
= p
;
23943 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23946 if (! *p
|| p
== arg_start
)
23947 dwarf2_macro_malformed_definition_complaint (body
);
23950 /* Make sure argv has room for the new argument. */
23951 if (argc
>= argv_size
)
23954 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23957 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23960 p
= consume_improper_spaces (p
, body
);
23962 /* Consume the comma, if present. */
23967 p
= consume_improper_spaces (p
, body
);
23976 /* Perfectly formed definition, no complaints. */
23977 macro_define_function (file
, line
, name
.c_str (),
23978 argc
, (const char **) argv
,
23980 else if (*p
== '\0')
23982 /* Complain, but do define it. */
23983 dwarf2_macro_malformed_definition_complaint (body
);
23984 macro_define_function (file
, line
, name
.c_str (),
23985 argc
, (const char **) argv
,
23989 /* Just complain. */
23990 dwarf2_macro_malformed_definition_complaint (body
);
23993 /* Just complain. */
23994 dwarf2_macro_malformed_definition_complaint (body
);
23999 for (i
= 0; i
< argc
; i
++)
24005 dwarf2_macro_malformed_definition_complaint (body
);
24008 /* Skip some bytes from BYTES according to the form given in FORM.
24009 Returns the new pointer. */
24011 static const gdb_byte
*
24012 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24013 enum dwarf_form form
,
24014 unsigned int offset_size
,
24015 struct dwarf2_section_info
*section
)
24017 unsigned int bytes_read
;
24021 case DW_FORM_data1
:
24026 case DW_FORM_data2
:
24030 case DW_FORM_data4
:
24034 case DW_FORM_data8
:
24038 case DW_FORM_data16
:
24042 case DW_FORM_string
:
24043 read_direct_string (abfd
, bytes
, &bytes_read
);
24044 bytes
+= bytes_read
;
24047 case DW_FORM_sec_offset
:
24049 case DW_FORM_GNU_strp_alt
:
24050 bytes
+= offset_size
;
24053 case DW_FORM_block
:
24054 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24055 bytes
+= bytes_read
;
24058 case DW_FORM_block1
:
24059 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24061 case DW_FORM_block2
:
24062 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24064 case DW_FORM_block4
:
24065 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24068 case DW_FORM_addrx
:
24069 case DW_FORM_sdata
:
24071 case DW_FORM_udata
:
24072 case DW_FORM_GNU_addr_index
:
24073 case DW_FORM_GNU_str_index
:
24074 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24077 dwarf2_section_buffer_overflow_complaint (section
);
24082 case DW_FORM_implicit_const
:
24087 complaint (_("invalid form 0x%x in `%s'"),
24088 form
, section
->get_name ());
24096 /* A helper for dwarf_decode_macros that handles skipping an unknown
24097 opcode. Returns an updated pointer to the macro data buffer; or,
24098 on error, issues a complaint and returns NULL. */
24100 static const gdb_byte
*
24101 skip_unknown_opcode (unsigned int opcode
,
24102 const gdb_byte
**opcode_definitions
,
24103 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24105 unsigned int offset_size
,
24106 struct dwarf2_section_info
*section
)
24108 unsigned int bytes_read
, i
;
24110 const gdb_byte
*defn
;
24112 if (opcode_definitions
[opcode
] == NULL
)
24114 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24119 defn
= opcode_definitions
[opcode
];
24120 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24121 defn
+= bytes_read
;
24123 for (i
= 0; i
< arg
; ++i
)
24125 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24126 (enum dwarf_form
) defn
[i
], offset_size
,
24128 if (mac_ptr
== NULL
)
24130 /* skip_form_bytes already issued the complaint. */
24138 /* A helper function which parses the header of a macro section.
24139 If the macro section is the extended (for now called "GNU") type,
24140 then this updates *OFFSET_SIZE. Returns a pointer to just after
24141 the header, or issues a complaint and returns NULL on error. */
24143 static const gdb_byte
*
24144 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24146 const gdb_byte
*mac_ptr
,
24147 unsigned int *offset_size
,
24148 int section_is_gnu
)
24150 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24152 if (section_is_gnu
)
24154 unsigned int version
, flags
;
24156 version
= read_2_bytes (abfd
, mac_ptr
);
24157 if (version
!= 4 && version
!= 5)
24159 complaint (_("unrecognized version `%d' in .debug_macro section"),
24165 flags
= read_1_byte (abfd
, mac_ptr
);
24167 *offset_size
= (flags
& 1) ? 8 : 4;
24169 if ((flags
& 2) != 0)
24170 /* We don't need the line table offset. */
24171 mac_ptr
+= *offset_size
;
24173 /* Vendor opcode descriptions. */
24174 if ((flags
& 4) != 0)
24176 unsigned int i
, count
;
24178 count
= read_1_byte (abfd
, mac_ptr
);
24180 for (i
= 0; i
< count
; ++i
)
24182 unsigned int opcode
, bytes_read
;
24185 opcode
= read_1_byte (abfd
, mac_ptr
);
24187 opcode_definitions
[opcode
] = mac_ptr
;
24188 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24189 mac_ptr
+= bytes_read
;
24198 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24199 including DW_MACRO_import. */
24202 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24204 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24205 struct macro_source_file
*current_file
,
24206 struct line_header
*lh
,
24207 struct dwarf2_section_info
*section
,
24208 int section_is_gnu
, int section_is_dwz
,
24209 unsigned int offset_size
,
24210 htab_t include_hash
)
24212 struct dwarf2_per_objfile
*dwarf2_per_objfile
24213 = cu
->per_cu
->dwarf2_per_objfile
;
24214 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24215 enum dwarf_macro_record_type macinfo_type
;
24216 int at_commandline
;
24217 const gdb_byte
*opcode_definitions
[256];
24219 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24220 &offset_size
, section_is_gnu
);
24221 if (mac_ptr
== NULL
)
24223 /* We already issued a complaint. */
24227 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24228 GDB is still reading the definitions from command line. First
24229 DW_MACINFO_start_file will need to be ignored as it was already executed
24230 to create CURRENT_FILE for the main source holding also the command line
24231 definitions. On first met DW_MACINFO_start_file this flag is reset to
24232 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24234 at_commandline
= 1;
24238 /* Do we at least have room for a macinfo type byte? */
24239 if (mac_ptr
>= mac_end
)
24241 dwarf2_section_buffer_overflow_complaint (section
);
24245 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24248 /* Note that we rely on the fact that the corresponding GNU and
24249 DWARF constants are the same. */
24251 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24252 switch (macinfo_type
)
24254 /* A zero macinfo type indicates the end of the macro
24259 case DW_MACRO_define
:
24260 case DW_MACRO_undef
:
24261 case DW_MACRO_define_strp
:
24262 case DW_MACRO_undef_strp
:
24263 case DW_MACRO_define_sup
:
24264 case DW_MACRO_undef_sup
:
24266 unsigned int bytes_read
;
24271 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24272 mac_ptr
+= bytes_read
;
24274 if (macinfo_type
== DW_MACRO_define
24275 || macinfo_type
== DW_MACRO_undef
)
24277 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24278 mac_ptr
+= bytes_read
;
24282 LONGEST str_offset
;
24284 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24285 mac_ptr
+= offset_size
;
24287 if (macinfo_type
== DW_MACRO_define_sup
24288 || macinfo_type
== DW_MACRO_undef_sup
24291 struct dwz_file
*dwz
24292 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24294 body
= read_indirect_string_from_dwz (objfile
,
24298 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24302 is_define
= (macinfo_type
== DW_MACRO_define
24303 || macinfo_type
== DW_MACRO_define_strp
24304 || macinfo_type
== DW_MACRO_define_sup
);
24305 if (! current_file
)
24307 /* DWARF violation as no main source is present. */
24308 complaint (_("debug info with no main source gives macro %s "
24310 is_define
? _("definition") : _("undefinition"),
24314 if ((line
== 0 && !at_commandline
)
24315 || (line
!= 0 && at_commandline
))
24316 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24317 at_commandline
? _("command-line") : _("in-file"),
24318 is_define
? _("definition") : _("undefinition"),
24319 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24323 /* Fedora's rpm-build's "debugedit" binary
24324 corrupted .debug_macro sections.
24327 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24328 complaint (_("debug info gives %s invalid macro %s "
24329 "without body (corrupted?) at line %d "
24331 at_commandline
? _("command-line") : _("in-file"),
24332 is_define
? _("definition") : _("undefinition"),
24333 line
, current_file
->filename
);
24335 else if (is_define
)
24336 parse_macro_definition (current_file
, line
, body
);
24339 gdb_assert (macinfo_type
== DW_MACRO_undef
24340 || macinfo_type
== DW_MACRO_undef_strp
24341 || macinfo_type
== DW_MACRO_undef_sup
);
24342 macro_undef (current_file
, line
, body
);
24347 case DW_MACRO_start_file
:
24349 unsigned int bytes_read
;
24352 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24353 mac_ptr
+= bytes_read
;
24354 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24355 mac_ptr
+= bytes_read
;
24357 if ((line
== 0 && !at_commandline
)
24358 || (line
!= 0 && at_commandline
))
24359 complaint (_("debug info gives source %d included "
24360 "from %s at %s line %d"),
24361 file
, at_commandline
? _("command-line") : _("file"),
24362 line
== 0 ? _("zero") : _("non-zero"), line
);
24364 if (at_commandline
)
24366 /* This DW_MACRO_start_file was executed in the
24368 at_commandline
= 0;
24371 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24376 case DW_MACRO_end_file
:
24377 if (! current_file
)
24378 complaint (_("macro debug info has an unmatched "
24379 "`close_file' directive"));
24382 current_file
= current_file
->included_by
;
24383 if (! current_file
)
24385 enum dwarf_macro_record_type next_type
;
24387 /* GCC circa March 2002 doesn't produce the zero
24388 type byte marking the end of the compilation
24389 unit. Complain if it's not there, but exit no
24392 /* Do we at least have room for a macinfo type byte? */
24393 if (mac_ptr
>= mac_end
)
24395 dwarf2_section_buffer_overflow_complaint (section
);
24399 /* We don't increment mac_ptr here, so this is just
24402 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24404 if (next_type
!= 0)
24405 complaint (_("no terminating 0-type entry for "
24406 "macros in `.debug_macinfo' section"));
24413 case DW_MACRO_import
:
24414 case DW_MACRO_import_sup
:
24418 bfd
*include_bfd
= abfd
;
24419 struct dwarf2_section_info
*include_section
= section
;
24420 const gdb_byte
*include_mac_end
= mac_end
;
24421 int is_dwz
= section_is_dwz
;
24422 const gdb_byte
*new_mac_ptr
;
24424 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24425 mac_ptr
+= offset_size
;
24427 if (macinfo_type
== DW_MACRO_import_sup
)
24429 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24431 dwz
->macro
.read (objfile
);
24433 include_section
= &dwz
->macro
;
24434 include_bfd
= include_section
->get_bfd_owner ();
24435 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24439 new_mac_ptr
= include_section
->buffer
+ offset
;
24440 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24444 /* This has actually happened; see
24445 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24446 complaint (_("recursive DW_MACRO_import in "
24447 ".debug_macro section"));
24451 *slot
= (void *) new_mac_ptr
;
24453 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24454 include_mac_end
, current_file
, lh
,
24455 section
, section_is_gnu
, is_dwz
,
24456 offset_size
, include_hash
);
24458 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24463 case DW_MACINFO_vendor_ext
:
24464 if (!section_is_gnu
)
24466 unsigned int bytes_read
;
24468 /* This reads the constant, but since we don't recognize
24469 any vendor extensions, we ignore it. */
24470 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24471 mac_ptr
+= bytes_read
;
24472 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24473 mac_ptr
+= bytes_read
;
24475 /* We don't recognize any vendor extensions. */
24481 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24482 mac_ptr
, mac_end
, abfd
, offset_size
,
24484 if (mac_ptr
== NULL
)
24489 } while (macinfo_type
!= 0);
24493 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24494 int section_is_gnu
)
24496 struct dwarf2_per_objfile
*dwarf2_per_objfile
24497 = cu
->per_cu
->dwarf2_per_objfile
;
24498 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24499 struct line_header
*lh
= cu
->line_header
;
24501 const gdb_byte
*mac_ptr
, *mac_end
;
24502 struct macro_source_file
*current_file
= 0;
24503 enum dwarf_macro_record_type macinfo_type
;
24504 unsigned int offset_size
= cu
->header
.offset_size
;
24505 const gdb_byte
*opcode_definitions
[256];
24507 struct dwarf2_section_info
*section
;
24508 const char *section_name
;
24510 if (cu
->dwo_unit
!= NULL
)
24512 if (section_is_gnu
)
24514 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24515 section_name
= ".debug_macro.dwo";
24519 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24520 section_name
= ".debug_macinfo.dwo";
24525 if (section_is_gnu
)
24527 section
= &dwarf2_per_objfile
->macro
;
24528 section_name
= ".debug_macro";
24532 section
= &dwarf2_per_objfile
->macinfo
;
24533 section_name
= ".debug_macinfo";
24537 section
->read (objfile
);
24538 if (section
->buffer
== NULL
)
24540 complaint (_("missing %s section"), section_name
);
24543 abfd
= section
->get_bfd_owner ();
24545 /* First pass: Find the name of the base filename.
24546 This filename is needed in order to process all macros whose definition
24547 (or undefinition) comes from the command line. These macros are defined
24548 before the first DW_MACINFO_start_file entry, and yet still need to be
24549 associated to the base file.
24551 To determine the base file name, we scan the macro definitions until we
24552 reach the first DW_MACINFO_start_file entry. We then initialize
24553 CURRENT_FILE accordingly so that any macro definition found before the
24554 first DW_MACINFO_start_file can still be associated to the base file. */
24556 mac_ptr
= section
->buffer
+ offset
;
24557 mac_end
= section
->buffer
+ section
->size
;
24559 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24560 &offset_size
, section_is_gnu
);
24561 if (mac_ptr
== NULL
)
24563 /* We already issued a complaint. */
24569 /* Do we at least have room for a macinfo type byte? */
24570 if (mac_ptr
>= mac_end
)
24572 /* Complaint is printed during the second pass as GDB will probably
24573 stop the first pass earlier upon finding
24574 DW_MACINFO_start_file. */
24578 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24581 /* Note that we rely on the fact that the corresponding GNU and
24582 DWARF constants are the same. */
24584 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24585 switch (macinfo_type
)
24587 /* A zero macinfo type indicates the end of the macro
24592 case DW_MACRO_define
:
24593 case DW_MACRO_undef
:
24594 /* Only skip the data by MAC_PTR. */
24596 unsigned int bytes_read
;
24598 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24599 mac_ptr
+= bytes_read
;
24600 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24601 mac_ptr
+= bytes_read
;
24605 case DW_MACRO_start_file
:
24607 unsigned int bytes_read
;
24610 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24611 mac_ptr
+= bytes_read
;
24612 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24613 mac_ptr
+= bytes_read
;
24615 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24619 case DW_MACRO_end_file
:
24620 /* No data to skip by MAC_PTR. */
24623 case DW_MACRO_define_strp
:
24624 case DW_MACRO_undef_strp
:
24625 case DW_MACRO_define_sup
:
24626 case DW_MACRO_undef_sup
:
24628 unsigned int bytes_read
;
24630 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24631 mac_ptr
+= bytes_read
;
24632 mac_ptr
+= offset_size
;
24636 case DW_MACRO_import
:
24637 case DW_MACRO_import_sup
:
24638 /* Note that, according to the spec, a transparent include
24639 chain cannot call DW_MACRO_start_file. So, we can just
24640 skip this opcode. */
24641 mac_ptr
+= offset_size
;
24644 case DW_MACINFO_vendor_ext
:
24645 /* Only skip the data by MAC_PTR. */
24646 if (!section_is_gnu
)
24648 unsigned int bytes_read
;
24650 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24651 mac_ptr
+= bytes_read
;
24652 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24653 mac_ptr
+= bytes_read
;
24658 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24659 mac_ptr
, mac_end
, abfd
, offset_size
,
24661 if (mac_ptr
== NULL
)
24666 } while (macinfo_type
!= 0 && current_file
== NULL
);
24668 /* Second pass: Process all entries.
24670 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24671 command-line macro definitions/undefinitions. This flag is unset when we
24672 reach the first DW_MACINFO_start_file entry. */
24674 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24676 NULL
, xcalloc
, xfree
));
24677 mac_ptr
= section
->buffer
+ offset
;
24678 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24679 *slot
= (void *) mac_ptr
;
24680 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
24681 current_file
, lh
, section
,
24682 section_is_gnu
, 0, offset_size
,
24683 include_hash
.get ());
24686 /* Return the .debug_loc section to use for CU.
24687 For DWO files use .debug_loc.dwo. */
24689 static struct dwarf2_section_info
*
24690 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24692 struct dwarf2_per_objfile
*dwarf2_per_objfile
24693 = cu
->per_cu
->dwarf2_per_objfile
;
24697 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24699 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24701 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24702 : &dwarf2_per_objfile
->loc
);
24705 /* A helper function that fills in a dwarf2_loclist_baton. */
24708 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24709 struct dwarf2_loclist_baton
*baton
,
24710 const struct attribute
*attr
)
24712 struct dwarf2_per_objfile
*dwarf2_per_objfile
24713 = cu
->per_cu
->dwarf2_per_objfile
;
24714 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24716 section
->read (dwarf2_per_objfile
->objfile
);
24718 baton
->per_cu
= cu
->per_cu
;
24719 gdb_assert (baton
->per_cu
);
24720 /* We don't know how long the location list is, but make sure we
24721 don't run off the edge of the section. */
24722 baton
->size
= section
->size
- DW_UNSND (attr
);
24723 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24724 baton
->base_address
= cu
->base_address
;
24725 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24729 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24730 struct dwarf2_cu
*cu
, int is_block
)
24732 struct dwarf2_per_objfile
*dwarf2_per_objfile
24733 = cu
->per_cu
->dwarf2_per_objfile
;
24734 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24735 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24737 if (attr
->form_is_section_offset ()
24738 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24739 the section. If so, fall through to the complaint in the
24741 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24743 struct dwarf2_loclist_baton
*baton
;
24745 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24747 fill_in_loclist_baton (cu
, baton
, attr
);
24749 if (cu
->base_known
== 0)
24750 complaint (_("Location list used without "
24751 "specifying the CU base address."));
24753 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24754 ? dwarf2_loclist_block_index
24755 : dwarf2_loclist_index
);
24756 SYMBOL_LOCATION_BATON (sym
) = baton
;
24760 struct dwarf2_locexpr_baton
*baton
;
24762 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24763 baton
->per_cu
= cu
->per_cu
;
24764 gdb_assert (baton
->per_cu
);
24766 if (attr
->form_is_block ())
24768 /* Note that we're just copying the block's data pointer
24769 here, not the actual data. We're still pointing into the
24770 info_buffer for SYM's objfile; right now we never release
24771 that buffer, but when we do clean up properly this may
24773 baton
->size
= DW_BLOCK (attr
)->size
;
24774 baton
->data
= DW_BLOCK (attr
)->data
;
24778 dwarf2_invalid_attrib_class_complaint ("location description",
24779 sym
->natural_name ());
24783 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24784 ? dwarf2_locexpr_block_index
24785 : dwarf2_locexpr_index
);
24786 SYMBOL_LOCATION_BATON (sym
) = baton
;
24790 /* Return the OBJFILE associated with the compilation unit CU. If CU
24791 came from a separate debuginfo file, then the master objfile is
24795 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24797 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24799 /* Return the master objfile, so that we can report and look up the
24800 correct file containing this variable. */
24801 if (objfile
->separate_debug_objfile_backlink
)
24802 objfile
= objfile
->separate_debug_objfile_backlink
;
24807 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24808 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24809 CU_HEADERP first. */
24811 static const struct comp_unit_head
*
24812 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24813 struct dwarf2_per_cu_data
*per_cu
)
24815 const gdb_byte
*info_ptr
;
24818 return &per_cu
->cu
->header
;
24820 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24822 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24823 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24824 rcuh_kind::COMPILE
);
24829 /* Return the address size given in the compilation unit header for CU. */
24832 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24834 struct comp_unit_head cu_header_local
;
24835 const struct comp_unit_head
*cu_headerp
;
24837 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24839 return cu_headerp
->addr_size
;
24842 /* Return the offset size given in the compilation unit header for CU. */
24845 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24847 struct comp_unit_head cu_header_local
;
24848 const struct comp_unit_head
*cu_headerp
;
24850 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24852 return cu_headerp
->offset_size
;
24855 /* See its dwarf2loc.h declaration. */
24858 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24860 struct comp_unit_head cu_header_local
;
24861 const struct comp_unit_head
*cu_headerp
;
24863 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24865 if (cu_headerp
->version
== 2)
24866 return cu_headerp
->addr_size
;
24868 return cu_headerp
->offset_size
;
24871 /* Return the text offset of the CU. The returned offset comes from
24872 this CU's objfile. If this objfile came from a separate debuginfo
24873 file, then the offset may be different from the corresponding
24874 offset in the parent objfile. */
24877 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24879 return per_cu
->dwarf2_per_objfile
->objfile
->text_section_offset ();
24882 /* Return a type that is a generic pointer type, the size of which matches
24883 the address size given in the compilation unit header for PER_CU. */
24884 static struct type
*
24885 dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data
*per_cu
)
24887 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24888 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
24889 struct type
*addr_type
= lookup_pointer_type (void_type
);
24890 int addr_size
= dwarf2_per_cu_addr_size (per_cu
);
24892 if (TYPE_LENGTH (addr_type
) == addr_size
)
24896 = dwarf2_per_cu_addr_sized_int_type (per_cu
, TYPE_UNSIGNED (addr_type
));
24900 /* Return DWARF version number of PER_CU. */
24903 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24905 return per_cu
->dwarf_version
;
24908 /* Locate the .debug_info compilation unit from CU's objfile which contains
24909 the DIE at OFFSET. Raises an error on failure. */
24911 static struct dwarf2_per_cu_data
*
24912 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24913 unsigned int offset_in_dwz
,
24914 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24916 struct dwarf2_per_cu_data
*this_cu
;
24920 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24923 struct dwarf2_per_cu_data
*mid_cu
;
24924 int mid
= low
+ (high
- low
) / 2;
24926 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24927 if (mid_cu
->is_dwz
> offset_in_dwz
24928 || (mid_cu
->is_dwz
== offset_in_dwz
24929 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
24934 gdb_assert (low
== high
);
24935 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24936 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
24938 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24939 error (_("Dwarf Error: could not find partial DIE containing "
24940 "offset %s [in module %s]"),
24941 sect_offset_str (sect_off
),
24942 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24944 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24946 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24950 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
24951 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24952 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24953 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24958 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24960 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24961 : per_cu (per_cu_
),
24963 has_loclist (false),
24964 checked_producer (false),
24965 producer_is_gxx_lt_4_6 (false),
24966 producer_is_gcc_lt_4_3 (false),
24967 producer_is_icc (false),
24968 producer_is_icc_lt_14 (false),
24969 producer_is_codewarrior (false),
24970 processing_has_namespace_info (false)
24975 /* Destroy a dwarf2_cu. */
24977 dwarf2_cu::~dwarf2_cu ()
24982 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24985 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24986 enum language pretend_language
)
24988 struct attribute
*attr
;
24990 /* Set the language we're debugging. */
24991 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24992 if (attr
!= nullptr)
24993 set_cu_language (DW_UNSND (attr
), cu
);
24996 cu
->language
= pretend_language
;
24997 cu
->language_defn
= language_def (cu
->language
);
25000 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25003 /* Increase the age counter on each cached compilation unit, and free
25004 any that are too old. */
25007 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25009 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25011 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25012 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25013 while (per_cu
!= NULL
)
25015 per_cu
->cu
->last_used
++;
25016 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25017 dwarf2_mark (per_cu
->cu
);
25018 per_cu
= per_cu
->cu
->read_in_chain
;
25021 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25022 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25023 while (per_cu
!= NULL
)
25025 struct dwarf2_per_cu_data
*next_cu
;
25027 next_cu
= per_cu
->cu
->read_in_chain
;
25029 if (!per_cu
->cu
->mark
)
25032 *last_chain
= next_cu
;
25035 last_chain
= &per_cu
->cu
->read_in_chain
;
25041 /* Remove a single compilation unit from the cache. */
25044 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25046 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25047 struct dwarf2_per_objfile
*dwarf2_per_objfile
25048 = target_per_cu
->dwarf2_per_objfile
;
25050 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25051 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25052 while (per_cu
!= NULL
)
25054 struct dwarf2_per_cu_data
*next_cu
;
25056 next_cu
= per_cu
->cu
->read_in_chain
;
25058 if (per_cu
== target_per_cu
)
25062 *last_chain
= next_cu
;
25066 last_chain
= &per_cu
->cu
->read_in_chain
;
25072 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25073 We store these in a hash table separate from the DIEs, and preserve them
25074 when the DIEs are flushed out of cache.
25076 The CU "per_cu" pointer is needed because offset alone is not enough to
25077 uniquely identify the type. A file may have multiple .debug_types sections,
25078 or the type may come from a DWO file. Furthermore, while it's more logical
25079 to use per_cu->section+offset, with Fission the section with the data is in
25080 the DWO file but we don't know that section at the point we need it.
25081 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25082 because we can enter the lookup routine, get_die_type_at_offset, from
25083 outside this file, and thus won't necessarily have PER_CU->cu.
25084 Fortunately, PER_CU is stable for the life of the objfile. */
25086 struct dwarf2_per_cu_offset_and_type
25088 const struct dwarf2_per_cu_data
*per_cu
;
25089 sect_offset sect_off
;
25093 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25096 per_cu_offset_and_type_hash (const void *item
)
25098 const struct dwarf2_per_cu_offset_and_type
*ofs
25099 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25101 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25104 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25107 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25109 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25110 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25111 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25112 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25114 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25115 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25118 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25119 table if necessary. For convenience, return TYPE.
25121 The DIEs reading must have careful ordering to:
25122 * Not cause infinite loops trying to read in DIEs as a prerequisite for
25123 reading current DIE.
25124 * Not trying to dereference contents of still incompletely read in types
25125 while reading in other DIEs.
25126 * Enable referencing still incompletely read in types just by a pointer to
25127 the type without accessing its fields.
25129 Therefore caller should follow these rules:
25130 * Try to fetch any prerequisite types we may need to build this DIE type
25131 before building the type and calling set_die_type.
25132 * After building type call set_die_type for current DIE as soon as
25133 possible before fetching more types to complete the current type.
25134 * Make the type as complete as possible before fetching more types. */
25136 static struct type
*
25137 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25139 struct dwarf2_per_objfile
*dwarf2_per_objfile
25140 = cu
->per_cu
->dwarf2_per_objfile
;
25141 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25142 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25143 struct attribute
*attr
;
25144 struct dynamic_prop prop
;
25146 /* For Ada types, make sure that the gnat-specific data is always
25147 initialized (if not already set). There are a few types where
25148 we should not be doing so, because the type-specific area is
25149 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25150 where the type-specific area is used to store the floatformat).
25151 But this is not a problem, because the gnat-specific information
25152 is actually not needed for these types. */
25153 if (need_gnat_info (cu
)
25154 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25155 && TYPE_CODE (type
) != TYPE_CODE_FLT
25156 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25157 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25158 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25159 && !HAVE_GNAT_AUX_INFO (type
))
25160 INIT_GNAT_SPECIFIC (type
);
25162 /* Read DW_AT_allocated and set in type. */
25163 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25164 if (attr
!= NULL
&& attr
->form_is_block ())
25166 struct type
*prop_type
25167 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25168 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25169 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25171 else if (attr
!= NULL
)
25173 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25174 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25175 sect_offset_str (die
->sect_off
));
25178 /* Read DW_AT_associated and set in type. */
25179 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25180 if (attr
!= NULL
&& attr
->form_is_block ())
25182 struct type
*prop_type
25183 = dwarf2_per_cu_addr_sized_int_type (cu
->per_cu
, false);
25184 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25185 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25187 else if (attr
!= NULL
)
25189 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25190 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25191 sect_offset_str (die
->sect_off
));
25194 /* Read DW_AT_data_location and set in type. */
25195 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25196 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
25197 dwarf2_per_cu_addr_type (cu
->per_cu
)))
25198 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25200 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25202 dwarf2_per_objfile
->die_type_hash
=
25203 htab_create_alloc_ex (127,
25204 per_cu_offset_and_type_hash
,
25205 per_cu_offset_and_type_eq
,
25207 &objfile
->objfile_obstack
,
25208 hashtab_obstack_allocate
,
25209 dummy_obstack_deallocate
);
25212 ofs
.per_cu
= cu
->per_cu
;
25213 ofs
.sect_off
= die
->sect_off
;
25215 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25216 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25218 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25219 sect_offset_str (die
->sect_off
));
25220 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25221 struct dwarf2_per_cu_offset_and_type
);
25226 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25227 or return NULL if the die does not have a saved type. */
25229 static struct type
*
25230 get_die_type_at_offset (sect_offset sect_off
,
25231 struct dwarf2_per_cu_data
*per_cu
)
25233 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25234 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25236 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25239 ofs
.per_cu
= per_cu
;
25240 ofs
.sect_off
= sect_off
;
25241 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25242 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25249 /* Look up the type for DIE in CU in die_type_hash,
25250 or return NULL if DIE does not have a saved type. */
25252 static struct type
*
25253 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25255 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25258 /* Add a dependence relationship from CU to REF_PER_CU. */
25261 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25262 struct dwarf2_per_cu_data
*ref_per_cu
)
25266 if (cu
->dependencies
== NULL
)
25268 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25269 NULL
, &cu
->comp_unit_obstack
,
25270 hashtab_obstack_allocate
,
25271 dummy_obstack_deallocate
);
25273 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25275 *slot
= ref_per_cu
;
25278 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25279 Set the mark field in every compilation unit in the
25280 cache that we must keep because we are keeping CU. */
25283 dwarf2_mark_helper (void **slot
, void *data
)
25285 struct dwarf2_per_cu_data
*per_cu
;
25287 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25289 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25290 reading of the chain. As such dependencies remain valid it is not much
25291 useful to track and undo them during QUIT cleanups. */
25292 if (per_cu
->cu
== NULL
)
25295 if (per_cu
->cu
->mark
)
25297 per_cu
->cu
->mark
= true;
25299 if (per_cu
->cu
->dependencies
!= NULL
)
25300 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25305 /* Set the mark field in CU and in every other compilation unit in the
25306 cache that we must keep because we are keeping CU. */
25309 dwarf2_mark (struct dwarf2_cu
*cu
)
25314 if (cu
->dependencies
!= NULL
)
25315 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25319 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25323 per_cu
->cu
->mark
= false;
25324 per_cu
= per_cu
->cu
->read_in_chain
;
25328 /* Trivial hash function for partial_die_info: the hash value of a DIE
25329 is its offset in .debug_info for this objfile. */
25332 partial_die_hash (const void *item
)
25334 const struct partial_die_info
*part_die
25335 = (const struct partial_die_info
*) item
;
25337 return to_underlying (part_die
->sect_off
);
25340 /* Trivial comparison function for partial_die_info structures: two DIEs
25341 are equal if they have the same offset. */
25344 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25346 const struct partial_die_info
*part_die_lhs
25347 = (const struct partial_die_info
*) item_lhs
;
25348 const struct partial_die_info
*part_die_rhs
25349 = (const struct partial_die_info
*) item_rhs
;
25351 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25354 struct cmd_list_element
*set_dwarf_cmdlist
;
25355 struct cmd_list_element
*show_dwarf_cmdlist
;
25358 set_dwarf_cmd (const char *args
, int from_tty
)
25360 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25365 show_dwarf_cmd (const char *args
, int from_tty
)
25367 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25370 bool dwarf_always_disassemble
;
25373 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25374 struct cmd_list_element
*c
, const char *value
)
25376 fprintf_filtered (file
,
25377 _("Whether to always disassemble "
25378 "DWARF expressions is %s.\n"),
25383 show_check_physname (struct ui_file
*file
, int from_tty
,
25384 struct cmd_list_element
*c
, const char *value
)
25386 fprintf_filtered (file
,
25387 _("Whether to check \"physname\" is %s.\n"),
25391 void _initialize_dwarf2_read ();
25393 _initialize_dwarf2_read ()
25395 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25396 Set DWARF specific variables.\n\
25397 Configure DWARF variables such as the cache size."),
25398 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25399 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25401 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25402 Show DWARF specific variables.\n\
25403 Show DWARF variables such as the cache size."),
25404 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25405 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25407 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25408 &dwarf_max_cache_age
, _("\
25409 Set the upper bound on the age of cached DWARF compilation units."), _("\
25410 Show the upper bound on the age of cached DWARF compilation units."), _("\
25411 A higher limit means that cached compilation units will be stored\n\
25412 in memory longer, and more total memory will be used. Zero disables\n\
25413 caching, which can slow down startup."),
25415 show_dwarf_max_cache_age
,
25416 &set_dwarf_cmdlist
,
25417 &show_dwarf_cmdlist
);
25419 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25420 &dwarf_always_disassemble
, _("\
25421 Set whether `info address' always disassembles DWARF expressions."), _("\
25422 Show whether `info address' always disassembles DWARF expressions."), _("\
25423 When enabled, DWARF expressions are always printed in an assembly-like\n\
25424 syntax. When disabled, expressions will be printed in a more\n\
25425 conversational style, when possible."),
25427 show_dwarf_always_disassemble
,
25428 &set_dwarf_cmdlist
,
25429 &show_dwarf_cmdlist
);
25431 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25432 Set debugging of the DWARF reader."), _("\
25433 Show debugging of the DWARF reader."), _("\
25434 When enabled (non-zero), debugging messages are printed during DWARF\n\
25435 reading and symtab expansion. A value of 1 (one) provides basic\n\
25436 information. A value greater than 1 provides more verbose information."),
25439 &setdebuglist
, &showdebuglist
);
25441 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25442 Set debugging of the DWARF DIE reader."), _("\
25443 Show debugging of the DWARF DIE reader."), _("\
25444 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25445 The value is the maximum depth to print."),
25448 &setdebuglist
, &showdebuglist
);
25450 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25451 Set debugging of the dwarf line reader."), _("\
25452 Show debugging of the dwarf line reader."), _("\
25453 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25454 A value of 1 (one) provides basic information.\n\
25455 A value greater than 1 provides more verbose information."),
25458 &setdebuglist
, &showdebuglist
);
25460 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25461 Set cross-checking of \"physname\" code against demangler."), _("\
25462 Show cross-checking of \"physname\" code against demangler."), _("\
25463 When enabled, GDB's internal \"physname\" code is checked against\n\
25465 NULL
, show_check_physname
,
25466 &setdebuglist
, &showdebuglist
);
25468 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25469 no_class
, &use_deprecated_index_sections
, _("\
25470 Set whether to use deprecated gdb_index sections."), _("\
25471 Show whether to use deprecated gdb_index sections."), _("\
25472 When enabled, deprecated .gdb_index sections are used anyway.\n\
25473 Normally they are ignored either because of a missing feature or\n\
25474 performance issue.\n\
25475 Warning: This option must be enabled before gdb reads the file."),
25478 &setlist
, &showlist
);
25480 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25481 &dwarf2_locexpr_funcs
);
25482 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25483 &dwarf2_loclist_funcs
);
25485 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25486 &dwarf2_block_frame_base_locexpr_funcs
);
25487 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25488 &dwarf2_block_frame_base_loclist_funcs
);
25491 selftests::register_test ("dw2_expand_symtabs_matching",
25492 selftests::dw2_expand_symtabs_matching::run_test
);