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/comp-unit.h"
36 #include "dwarf2/index-cache.h"
37 #include "dwarf2/index-common.h"
38 #include "dwarf2/leb.h"
39 #include "dwarf2/line-header.h"
40 #include "dwarf2/dwz.h"
41 #include "dwarf2/macro.h"
42 #include "dwarf2/die.h"
43 #include "dwarf2/stringify.h"
52 #include "gdb-demangle.h"
53 #include "filenames.h" /* for DOSish file names */
55 #include "complaints.h"
56 #include "dwarf2/expr.h"
57 #include "dwarf2/loc.h"
58 #include "cp-support.h"
64 #include "typeprint.h"
69 #include "gdbcore.h" /* for gnutarget */
70 #include "gdb/gdb-index.h"
75 #include "namespace.h"
76 #include "gdbsupport/function-view.h"
77 #include "gdbsupport/gdb_optional.h"
78 #include "gdbsupport/underlying.h"
79 #include "gdbsupport/hash_enum.h"
80 #include "filename-seen-cache.h"
84 #include <unordered_map>
85 #include "gdbsupport/selftest.h"
86 #include "rust-lang.h"
87 #include "gdbsupport/pathstuff.h"
88 #include "count-one-bits.h"
89 #include "debuginfod-support.h"
91 /* When == 1, print basic high level tracing messages.
92 When > 1, be more verbose.
93 This is in contrast to the low level DIE reading of dwarf_die_debug. */
94 static unsigned int dwarf_read_debug
= 0;
96 /* When non-zero, dump DIEs after they are read in. */
97 static unsigned int dwarf_die_debug
= 0;
99 /* When non-zero, dump line number entries as they are read in. */
100 unsigned int dwarf_line_debug
= 0;
102 /* When true, cross-check physname against demangler. */
103 static bool check_physname
= false;
105 /* When true, do not reject deprecated .gdb_index sections. */
106 static bool use_deprecated_index_sections
= false;
108 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
110 /* The "aclass" indices for various kinds of computed DWARF symbols. */
112 static int dwarf2_locexpr_index
;
113 static int dwarf2_loclist_index
;
114 static int dwarf2_locexpr_block_index
;
115 static int dwarf2_loclist_block_index
;
117 /* Size of .debug_loclists section header for 32-bit DWARF format. */
118 #define LOCLIST_HEADER_SIZE32 12
120 /* Size of .debug_loclists section header for 64-bit DWARF format. */
121 #define LOCLIST_HEADER_SIZE64 20
123 /* An index into a (C++) symbol name component in a symbol name as
124 recorded in the mapped_index's symbol table. For each C++ symbol
125 in the symbol table, we record one entry for the start of each
126 component in the symbol in a table of name components, and then
127 sort the table, in order to be able to binary search symbol names,
128 ignoring leading namespaces, both completion and regular look up.
129 For example, for symbol "A::B::C", we'll have an entry that points
130 to "A::B::C", another that points to "B::C", and another for "C".
131 Note that function symbols in GDB index have no parameter
132 information, just the function/method names. You can convert a
133 name_component to a "const char *" using the
134 'mapped_index::symbol_name_at(offset_type)' method. */
136 struct name_component
138 /* Offset in the symbol name where the component starts. Stored as
139 a (32-bit) offset instead of a pointer to save memory and improve
140 locality on 64-bit architectures. */
141 offset_type name_offset
;
143 /* The symbol's index in the symbol and constant pool tables of a
148 /* Base class containing bits shared by both .gdb_index and
149 .debug_name indexes. */
151 struct mapped_index_base
153 mapped_index_base () = default;
154 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
156 /* The name_component table (a sorted vector). See name_component's
157 description above. */
158 std::vector
<name_component
> name_components
;
160 /* How NAME_COMPONENTS is sorted. */
161 enum case_sensitivity name_components_casing
;
163 /* Return the number of names in the symbol table. */
164 virtual size_t symbol_name_count () const = 0;
166 /* Get the name of the symbol at IDX in the symbol table. */
167 virtual const char *symbol_name_at (offset_type idx
) const = 0;
169 /* Return whether the name at IDX in the symbol table should be
171 virtual bool symbol_name_slot_invalid (offset_type idx
) const
176 /* Build the symbol name component sorted vector, if we haven't
178 void build_name_components ();
180 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
181 possible matches for LN_NO_PARAMS in the name component
183 std::pair
<std::vector
<name_component
>::const_iterator
,
184 std::vector
<name_component
>::const_iterator
>
185 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
186 enum language lang
) const;
188 /* Prevent deleting/destroying via a base class pointer. */
190 ~mapped_index_base() = default;
193 /* A description of the mapped index. The file format is described in
194 a comment by the code that writes the index. */
195 struct mapped_index final
: public mapped_index_base
197 /* A slot/bucket in the symbol table hash. */
198 struct symbol_table_slot
200 const offset_type name
;
201 const offset_type vec
;
204 /* Index data format version. */
207 /* The address table data. */
208 gdb::array_view
<const gdb_byte
> address_table
;
210 /* The symbol table, implemented as a hash table. */
211 gdb::array_view
<symbol_table_slot
> symbol_table
;
213 /* A pointer to the constant pool. */
214 const char *constant_pool
= nullptr;
216 bool symbol_name_slot_invalid (offset_type idx
) const override
218 const auto &bucket
= this->symbol_table
[idx
];
219 return bucket
.name
== 0 && bucket
.vec
== 0;
222 /* Convenience method to get at the name of the symbol at IDX in the
224 const char *symbol_name_at (offset_type idx
) const override
225 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
227 size_t symbol_name_count () const override
228 { return this->symbol_table
.size (); }
231 /* A description of the mapped .debug_names.
232 Uninitialized map has CU_COUNT 0. */
233 struct mapped_debug_names final
: public mapped_index_base
235 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
236 : dwarf2_per_objfile (dwarf2_per_objfile_
)
239 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
240 bfd_endian dwarf5_byte_order
;
241 bool dwarf5_is_dwarf64
;
242 bool augmentation_is_gdb
;
244 uint32_t cu_count
= 0;
245 uint32_t tu_count
, bucket_count
, name_count
;
246 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
247 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
248 const gdb_byte
*name_table_string_offs_reordered
;
249 const gdb_byte
*name_table_entry_offs_reordered
;
250 const gdb_byte
*entry_pool
;
257 /* Attribute name DW_IDX_*. */
260 /* Attribute form DW_FORM_*. */
263 /* Value if FORM is DW_FORM_implicit_const. */
264 LONGEST implicit_const
;
266 std::vector
<attr
> attr_vec
;
269 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
271 const char *namei_to_name (uint32_t namei
) const;
273 /* Implementation of the mapped_index_base virtual interface, for
274 the name_components cache. */
276 const char *symbol_name_at (offset_type idx
) const override
277 { return namei_to_name (idx
); }
279 size_t symbol_name_count () const override
280 { return this->name_count
; }
283 /* See dwarf2read.h. */
286 get_dwarf2_per_objfile (struct objfile
*objfile
)
288 return dwarf2_objfile_data_key
.get (objfile
);
291 /* Default names of the debugging sections. */
293 /* Note that if the debugging section has been compressed, it might
294 have a name like .zdebug_info. */
296 static const struct dwarf2_debug_sections dwarf2_elf_names
=
298 { ".debug_info", ".zdebug_info" },
299 { ".debug_abbrev", ".zdebug_abbrev" },
300 { ".debug_line", ".zdebug_line" },
301 { ".debug_loc", ".zdebug_loc" },
302 { ".debug_loclists", ".zdebug_loclists" },
303 { ".debug_macinfo", ".zdebug_macinfo" },
304 { ".debug_macro", ".zdebug_macro" },
305 { ".debug_str", ".zdebug_str" },
306 { ".debug_str_offsets", ".zdebug_str_offsets" },
307 { ".debug_line_str", ".zdebug_line_str" },
308 { ".debug_ranges", ".zdebug_ranges" },
309 { ".debug_rnglists", ".zdebug_rnglists" },
310 { ".debug_types", ".zdebug_types" },
311 { ".debug_addr", ".zdebug_addr" },
312 { ".debug_frame", ".zdebug_frame" },
313 { ".eh_frame", NULL
},
314 { ".gdb_index", ".zgdb_index" },
315 { ".debug_names", ".zdebug_names" },
316 { ".debug_aranges", ".zdebug_aranges" },
320 /* List of DWO/DWP sections. */
322 static const struct dwop_section_names
324 struct dwarf2_section_names abbrev_dwo
;
325 struct dwarf2_section_names info_dwo
;
326 struct dwarf2_section_names line_dwo
;
327 struct dwarf2_section_names loc_dwo
;
328 struct dwarf2_section_names loclists_dwo
;
329 struct dwarf2_section_names macinfo_dwo
;
330 struct dwarf2_section_names macro_dwo
;
331 struct dwarf2_section_names str_dwo
;
332 struct dwarf2_section_names str_offsets_dwo
;
333 struct dwarf2_section_names types_dwo
;
334 struct dwarf2_section_names cu_index
;
335 struct dwarf2_section_names tu_index
;
339 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
340 { ".debug_info.dwo", ".zdebug_info.dwo" },
341 { ".debug_line.dwo", ".zdebug_line.dwo" },
342 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
343 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
344 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
345 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
346 { ".debug_str.dwo", ".zdebug_str.dwo" },
347 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
348 { ".debug_types.dwo", ".zdebug_types.dwo" },
349 { ".debug_cu_index", ".zdebug_cu_index" },
350 { ".debug_tu_index", ".zdebug_tu_index" },
353 /* local data types */
355 /* The location list section (.debug_loclists) begins with a header,
356 which contains the following information. */
357 struct loclist_header
359 /* A 4-byte or 12-byte length containing the length of the
360 set of entries for this compilation unit, not including the
361 length field itself. */
364 /* A 2-byte version identifier. */
367 /* A 1-byte unsigned integer containing the size in bytes of an address on
368 the target system. */
369 unsigned char addr_size
;
371 /* A 1-byte unsigned integer containing the size in bytes of a segment selector
372 on the target system. */
373 unsigned char segment_collector_size
;
375 /* A 4-byte count of the number of offsets that follow the header. */
376 unsigned int offset_entry_count
;
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 gdb::optional
<CORE_ADDR
> base_address
;
429 /* The language we are debugging. */
430 enum language language
= language_unknown
;
431 const struct language_defn
*language_defn
= nullptr;
433 const char *producer
= nullptr;
436 /* The symtab builder for this CU. This is only non-NULL when full
437 symbols are being read. */
438 std::unique_ptr
<buildsym_compunit
> m_builder
;
441 /* The generic symbol table building routines have separate lists for
442 file scope symbols and all all other scopes (local scopes). So
443 we need to select the right one to pass to add_symbol_to_list().
444 We do it by keeping a pointer to the correct list in list_in_scope.
446 FIXME: The original dwarf code just treated the file scope as the
447 first local scope, and all other local scopes as nested local
448 scopes, and worked fine. Check to see if we really need to
449 distinguish these in buildsym.c. */
450 struct pending
**list_in_scope
= nullptr;
452 /* Hash table holding all the loaded partial DIEs
453 with partial_die->offset.SECT_OFF as hash. */
454 htab_t partial_dies
= nullptr;
456 /* Storage for things with the same lifetime as this read-in compilation
457 unit, including partial DIEs. */
458 auto_obstack comp_unit_obstack
;
460 /* When multiple dwarf2_cu structures are living in memory, this field
461 chains them all together, so that they can be released efficiently.
462 We will probably also want a generation counter so that most-recently-used
463 compilation units are cached... */
464 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
466 /* Backlink to our per_cu entry. */
467 struct dwarf2_per_cu_data
*per_cu
;
469 /* How many compilation units ago was this CU last referenced? */
472 /* A hash table of DIE cu_offset for following references with
473 die_info->offset.sect_off as hash. */
474 htab_t die_hash
= nullptr;
476 /* Full DIEs if read in. */
477 struct die_info
*dies
= nullptr;
479 /* A set of pointers to dwarf2_per_cu_data objects for compilation
480 units referenced by this one. Only set during full symbol processing;
481 partial symbol tables do not have dependencies. */
482 htab_t dependencies
= nullptr;
484 /* Header data from the line table, during full symbol processing. */
485 struct line_header
*line_header
= nullptr;
486 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
487 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
488 this is the DW_TAG_compile_unit die for this CU. We'll hold on
489 to the line header as long as this DIE is being processed. See
490 process_die_scope. */
491 die_info
*line_header_die_owner
= nullptr;
493 /* A list of methods which need to have physnames computed
494 after all type information has been read. */
495 std::vector
<delayed_method_info
> method_list
;
497 /* To be copied to symtab->call_site_htab. */
498 htab_t call_site_htab
= nullptr;
500 /* Non-NULL if this CU came from a DWO file.
501 There is an invariant here that is important to remember:
502 Except for attributes copied from the top level DIE in the "main"
503 (or "stub") file in preparation for reading the DWO file
504 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
505 Either there isn't a DWO file (in which case this is NULL and the point
506 is moot), or there is and either we're not going to read it (in which
507 case this is NULL) or there is and we are reading it (in which case this
509 struct dwo_unit
*dwo_unit
= nullptr;
511 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
512 Note this value comes from the Fission stub CU/TU's DIE. */
513 gdb::optional
<ULONGEST
> addr_base
;
515 /* The DW_AT_rnglists_base attribute if present.
516 Note this value comes from the Fission stub CU/TU's DIE.
517 Also note that the value is zero in the non-DWO case so this value can
518 be used without needing to know whether DWO files are in use or not.
519 N.B. This does not apply to DW_AT_ranges appearing in
520 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
521 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
522 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
523 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
524 ULONGEST ranges_base
= 0;
526 /* The DW_AT_loclists_base attribute if present. */
527 ULONGEST loclist_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 struct dwarf2_per_cu_data per_cu
;
613 /* The TUs that share this DW_AT_stmt_list entry.
614 This is added to while parsing type units to build partial symtabs,
615 and is deleted afterwards and not used again. */
616 std::vector
<signatured_type
*> *tus
;
618 /* The compunit symtab.
619 Type units in a group needn't all be defined in the same source file,
620 so we create an essentially anonymous symtab as the compunit symtab. */
621 struct compunit_symtab
*compunit_symtab
;
623 /* The data used to construct the hash key. */
624 struct stmt_list_hash hash
;
626 /* The symbol tables for this TU (obtained from the files listed in
628 WARNING: The order of entries here must match the order of entries
629 in the line header. After the first TU using this type_unit_group, the
630 line header for the subsequent TUs is recreated from this. This is done
631 because we need to use the same symtabs for each TU using the same
632 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
633 there's no guarantee the line header doesn't have duplicate entries. */
634 struct symtab
**symtabs
;
637 /* These sections are what may appear in a (real or virtual) DWO file. */
641 struct dwarf2_section_info abbrev
;
642 struct dwarf2_section_info line
;
643 struct dwarf2_section_info loc
;
644 struct dwarf2_section_info loclists
;
645 struct dwarf2_section_info macinfo
;
646 struct dwarf2_section_info macro
;
647 struct dwarf2_section_info str
;
648 struct dwarf2_section_info str_offsets
;
649 /* In the case of a virtual DWO file, these two are unused. */
650 struct dwarf2_section_info info
;
651 std::vector
<dwarf2_section_info
> types
;
654 /* CUs/TUs in DWP/DWO files. */
658 /* Backlink to the containing struct dwo_file. */
659 struct dwo_file
*dwo_file
;
661 /* The "id" that distinguishes this CU/TU.
662 .debug_info calls this "dwo_id", .debug_types calls this "signature".
663 Since signatures came first, we stick with it for consistency. */
666 /* The section this CU/TU lives in, in the DWO file. */
667 struct dwarf2_section_info
*section
;
669 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
670 sect_offset sect_off
;
673 /* For types, offset in the type's DIE of the type defined by this TU. */
674 cu_offset type_offset_in_tu
;
677 /* include/dwarf2.h defines the DWP section codes.
678 It defines a max value but it doesn't define a min value, which we
679 use for error checking, so provide one. */
681 enum dwp_v2_section_ids
686 /* Data for one DWO file.
688 This includes virtual DWO files (a virtual DWO file is a DWO file as it
689 appears in a DWP file). DWP files don't really have DWO files per se -
690 comdat folding of types "loses" the DWO file they came from, and from
691 a high level view DWP files appear to contain a mass of random types.
692 However, to maintain consistency with the non-DWP case we pretend DWP
693 files contain virtual DWO files, and we assign each TU with one virtual
694 DWO file (generally based on the line and abbrev section offsets -
695 a heuristic that seems to work in practice). */
699 dwo_file () = default;
700 DISABLE_COPY_AND_ASSIGN (dwo_file
);
702 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
703 For virtual DWO files the name is constructed from the section offsets
704 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
705 from related CU+TUs. */
706 const char *dwo_name
= nullptr;
708 /* The DW_AT_comp_dir attribute. */
709 const char *comp_dir
= nullptr;
711 /* The bfd, when the file is open. Otherwise this is NULL.
712 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
713 gdb_bfd_ref_ptr dbfd
;
715 /* The sections that make up this DWO file.
716 Remember that for virtual DWO files in DWP V2, these are virtual
717 sections (for lack of a better name). */
718 struct dwo_sections sections
{};
720 /* The CUs in the file.
721 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
722 an extension to handle LLVM's Link Time Optimization output (where
723 multiple source files may be compiled into a single object/dwo pair). */
726 /* Table of TUs in the file.
727 Each element is a struct dwo_unit. */
731 /* These sections are what may appear in a DWP file. */
735 /* These are used by both DWP version 1 and 2. */
736 struct dwarf2_section_info str
;
737 struct dwarf2_section_info cu_index
;
738 struct dwarf2_section_info tu_index
;
740 /* These are only used by DWP version 2 files.
741 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
742 sections are referenced by section number, and are not recorded here.
743 In DWP version 2 there is at most one copy of all these sections, each
744 section being (effectively) comprised of the concatenation of all of the
745 individual sections that exist in the version 1 format.
746 To keep the code simple we treat each of these concatenated pieces as a
747 section itself (a virtual section?). */
748 struct dwarf2_section_info abbrev
;
749 struct dwarf2_section_info info
;
750 struct dwarf2_section_info line
;
751 struct dwarf2_section_info loc
;
752 struct dwarf2_section_info macinfo
;
753 struct dwarf2_section_info macro
;
754 struct dwarf2_section_info str_offsets
;
755 struct dwarf2_section_info types
;
758 /* These sections are what may appear in a virtual DWO file in DWP version 1.
759 A virtual DWO file is a DWO file as it appears in a DWP file. */
761 struct virtual_v1_dwo_sections
763 struct dwarf2_section_info abbrev
;
764 struct dwarf2_section_info line
;
765 struct dwarf2_section_info loc
;
766 struct dwarf2_section_info macinfo
;
767 struct dwarf2_section_info macro
;
768 struct dwarf2_section_info str_offsets
;
769 /* Each DWP hash table entry records one CU or one TU.
770 That is recorded here, and copied to dwo_unit.section. */
771 struct dwarf2_section_info info_or_types
;
774 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
775 In version 2, the sections of the DWO files are concatenated together
776 and stored in one section of that name. Thus each ELF section contains
777 several "virtual" sections. */
779 struct virtual_v2_dwo_sections
781 bfd_size_type abbrev_offset
;
782 bfd_size_type abbrev_size
;
784 bfd_size_type line_offset
;
785 bfd_size_type line_size
;
787 bfd_size_type loc_offset
;
788 bfd_size_type loc_size
;
790 bfd_size_type macinfo_offset
;
791 bfd_size_type macinfo_size
;
793 bfd_size_type macro_offset
;
794 bfd_size_type macro_size
;
796 bfd_size_type str_offsets_offset
;
797 bfd_size_type str_offsets_size
;
799 /* Each DWP hash table entry records one CU or one TU.
800 That is recorded here, and copied to dwo_unit.section. */
801 bfd_size_type info_or_types_offset
;
802 bfd_size_type info_or_types_size
;
805 /* Contents of DWP hash tables. */
807 struct dwp_hash_table
809 uint32_t version
, nr_columns
;
810 uint32_t nr_units
, nr_slots
;
811 const gdb_byte
*hash_table
, *unit_table
;
816 const gdb_byte
*indices
;
820 /* This is indexed by column number and gives the id of the section
822 #define MAX_NR_V2_DWO_SECTIONS \
823 (1 /* .debug_info or .debug_types */ \
824 + 1 /* .debug_abbrev */ \
825 + 1 /* .debug_line */ \
826 + 1 /* .debug_loc */ \
827 + 1 /* .debug_str_offsets */ \
828 + 1 /* .debug_macro or .debug_macinfo */)
829 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
830 const gdb_byte
*offsets
;
831 const gdb_byte
*sizes
;
836 /* Data for one DWP file. */
840 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
842 dbfd (std::move (abfd
))
846 /* Name of the file. */
849 /* File format version. */
853 gdb_bfd_ref_ptr dbfd
;
855 /* Section info for this file. */
856 struct dwp_sections sections
{};
858 /* Table of CUs in the file. */
859 const struct dwp_hash_table
*cus
= nullptr;
861 /* Table of TUs in the file. */
862 const struct dwp_hash_table
*tus
= nullptr;
864 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
868 /* Table to map ELF section numbers to their sections.
869 This is only needed for the DWP V1 file format. */
870 unsigned int num_sections
= 0;
871 asection
**elf_sections
= nullptr;
874 /* Struct used to pass misc. parameters to read_die_and_children, et
875 al. which are used for both .debug_info and .debug_types dies.
876 All parameters here are unchanging for the life of the call. This
877 struct exists to abstract away the constant parameters of die reading. */
879 struct die_reader_specs
881 /* The bfd of die_section. */
884 /* The CU of the DIE we are parsing. */
885 struct dwarf2_cu
*cu
;
887 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
888 struct dwo_file
*dwo_file
;
890 /* The section the die comes from.
891 This is either .debug_info or .debug_types, or the .dwo variants. */
892 struct dwarf2_section_info
*die_section
;
894 /* die_section->buffer. */
895 const gdb_byte
*buffer
;
897 /* The end of the buffer. */
898 const gdb_byte
*buffer_end
;
900 /* The abbreviation table to use when reading the DIEs. */
901 struct abbrev_table
*abbrev_table
;
904 /* A subclass of die_reader_specs that holds storage and has complex
905 constructor and destructor behavior. */
907 class cutu_reader
: public die_reader_specs
911 cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
912 struct abbrev_table
*abbrev_table
,
916 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
917 struct dwarf2_cu
*parent_cu
= nullptr,
918 struct dwo_file
*dwo_file
= nullptr);
920 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
922 const gdb_byte
*info_ptr
= nullptr;
923 struct die_info
*comp_unit_die
= nullptr;
924 bool dummy_p
= false;
926 /* Release the new CU, putting it on the chain. This cannot be done
931 void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
932 int use_existing_cu
);
934 struct dwarf2_per_cu_data
*m_this_cu
;
935 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
937 /* The ordinary abbreviation table. */
938 abbrev_table_up m_abbrev_table_holder
;
940 /* The DWO abbreviation table. */
941 abbrev_table_up m_dwo_abbrev_table
;
944 /* When we construct a partial symbol table entry we only
945 need this much information. */
946 struct partial_die_info
: public allocate_on_obstack
948 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
950 /* Disable assign but still keep copy ctor, which is needed
951 load_partial_dies. */
952 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
954 /* Adjust the partial die before generating a symbol for it. This
955 function may set the is_external flag or change the DIE's
957 void fixup (struct dwarf2_cu
*cu
);
959 /* Read a minimal amount of information into the minimal die
961 const gdb_byte
*read (const struct die_reader_specs
*reader
,
962 const struct abbrev_info
&abbrev
,
963 const gdb_byte
*info_ptr
);
965 /* Offset of this DIE. */
966 const sect_offset sect_off
;
968 /* DWARF-2 tag for this DIE. */
969 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
971 /* Assorted flags describing the data found in this DIE. */
972 const unsigned int has_children
: 1;
974 unsigned int is_external
: 1;
975 unsigned int is_declaration
: 1;
976 unsigned int has_type
: 1;
977 unsigned int has_specification
: 1;
978 unsigned int has_pc_info
: 1;
979 unsigned int may_be_inlined
: 1;
981 /* This DIE has been marked DW_AT_main_subprogram. */
982 unsigned int main_subprogram
: 1;
984 /* Flag set if the SCOPE field of this structure has been
986 unsigned int scope_set
: 1;
988 /* Flag set if the DIE has a byte_size attribute. */
989 unsigned int has_byte_size
: 1;
991 /* Flag set if the DIE has a DW_AT_const_value attribute. */
992 unsigned int has_const_value
: 1;
994 /* Flag set if any of the DIE's children are template arguments. */
995 unsigned int has_template_arguments
: 1;
997 /* Flag set if fixup has been called on this die. */
998 unsigned int fixup_called
: 1;
1000 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1001 unsigned int is_dwz
: 1;
1003 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1004 unsigned int spec_is_dwz
: 1;
1006 /* The name of this DIE. Normally the value of DW_AT_name, but
1007 sometimes a default name for unnamed DIEs. */
1008 const char *name
= nullptr;
1010 /* The linkage name, if present. */
1011 const char *linkage_name
= nullptr;
1013 /* The scope to prepend to our children. This is generally
1014 allocated on the comp_unit_obstack, so will disappear
1015 when this compilation unit leaves the cache. */
1016 const char *scope
= nullptr;
1018 /* Some data associated with the partial DIE. The tag determines
1019 which field is live. */
1022 /* The location description associated with this DIE, if any. */
1023 struct dwarf_block
*locdesc
;
1024 /* The offset of an import, for DW_TAG_imported_unit. */
1025 sect_offset sect_off
;
1028 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1029 CORE_ADDR lowpc
= 0;
1030 CORE_ADDR highpc
= 0;
1032 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1033 DW_AT_sibling, if any. */
1034 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1035 could return DW_AT_sibling values to its caller load_partial_dies. */
1036 const gdb_byte
*sibling
= nullptr;
1038 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1039 DW_AT_specification (or DW_AT_abstract_origin or
1040 DW_AT_extension). */
1041 sect_offset spec_offset
{};
1043 /* Pointers to this DIE's parent, first child, and next sibling,
1045 struct partial_die_info
*die_parent
= nullptr;
1046 struct partial_die_info
*die_child
= nullptr;
1047 struct partial_die_info
*die_sibling
= nullptr;
1049 friend struct partial_die_info
*
1050 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1053 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1054 partial_die_info (sect_offset sect_off
)
1055 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1059 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1061 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1066 has_specification
= 0;
1069 main_subprogram
= 0;
1072 has_const_value
= 0;
1073 has_template_arguments
= 0;
1080 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1081 but this would require a corresponding change in unpack_field_as_long
1083 static int bits_per_byte
= 8;
1085 /* When reading a variant or variant part, we track a bit more
1086 information about the field, and store it in an object of this
1089 struct variant_field
1091 /* If we see a DW_TAG_variant, then this will be the discriminant
1093 ULONGEST discriminant_value
;
1094 /* If we see a DW_TAG_variant, then this will be set if this is the
1096 bool default_branch
;
1097 /* While reading a DW_TAG_variant_part, this will be set if this
1098 field is the discriminant. */
1099 bool is_discriminant
;
1104 int accessibility
= 0;
1106 /* Extra information to describe a variant or variant part. */
1107 struct variant_field variant
{};
1108 struct field field
{};
1113 const char *name
= nullptr;
1114 std::vector
<struct fn_field
> fnfields
;
1117 /* The routines that read and process dies for a C struct or C++ class
1118 pass lists of data member fields and lists of member function fields
1119 in an instance of a field_info structure, as defined below. */
1122 /* List of data member and baseclasses fields. */
1123 std::vector
<struct nextfield
> fields
;
1124 std::vector
<struct nextfield
> baseclasses
;
1126 /* Set if the accessibility of one of the fields is not public. */
1127 int non_public_fields
= 0;
1129 /* Member function fieldlist array, contains name of possibly overloaded
1130 member function, number of overloaded member functions and a pointer
1131 to the head of the member function field chain. */
1132 std::vector
<struct fnfieldlist
> fnfieldlists
;
1134 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1135 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1136 std::vector
<struct decl_field
> typedef_field_list
;
1138 /* Nested types defined by this class and the number of elements in this
1140 std::vector
<struct decl_field
> nested_types_list
;
1142 /* Return the total number of fields (including baseclasses). */
1143 int nfields () const
1145 return fields
.size () + baseclasses
.size ();
1149 /* Loaded secondary compilation units are kept in memory until they
1150 have not been referenced for the processing of this many
1151 compilation units. Set this to zero to disable caching. Cache
1152 sizes of up to at least twenty will improve startup time for
1153 typical inter-CU-reference binaries, at an obvious memory cost. */
1154 static int dwarf_max_cache_age
= 5;
1156 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1157 struct cmd_list_element
*c
, const char *value
)
1159 fprintf_filtered (file
, _("The upper bound on the age of cached "
1160 "DWARF compilation units is %s.\n"),
1164 /* local function prototypes */
1166 static void dwarf2_find_base_address (struct die_info
*die
,
1167 struct dwarf2_cu
*cu
);
1169 static dwarf2_psymtab
*create_partial_symtab
1170 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1172 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1173 const gdb_byte
*info_ptr
,
1174 struct die_info
*type_unit_die
);
1176 static void dwarf2_build_psymtabs_hard
1177 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1179 static void scan_partial_symbols (struct partial_die_info
*,
1180 CORE_ADDR
*, CORE_ADDR
*,
1181 int, struct dwarf2_cu
*);
1183 static void add_partial_symbol (struct partial_die_info
*,
1184 struct dwarf2_cu
*);
1186 static void add_partial_namespace (struct partial_die_info
*pdi
,
1187 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1188 int set_addrmap
, struct dwarf2_cu
*cu
);
1190 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1191 CORE_ADDR
*highpc
, int set_addrmap
,
1192 struct dwarf2_cu
*cu
);
1194 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1195 struct dwarf2_cu
*cu
);
1197 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1198 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1199 int need_pc
, struct dwarf2_cu
*cu
);
1201 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1203 static struct partial_die_info
*load_partial_dies
1204 (const struct die_reader_specs
*, const gdb_byte
*, int);
1206 /* A pair of partial_die_info and compilation unit. */
1207 struct cu_partial_die_info
1209 /* The compilation unit of the partial_die_info. */
1210 struct dwarf2_cu
*cu
;
1211 /* A partial_die_info. */
1212 struct partial_die_info
*pdi
;
1214 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1220 cu_partial_die_info () = delete;
1223 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1224 struct dwarf2_cu
*);
1226 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1227 struct attribute
*, struct attr_abbrev
*,
1228 const gdb_byte
*, bool *need_reprocess
);
1230 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1231 struct attribute
*attr
);
1233 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1235 static sect_offset read_abbrev_offset
1236 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1237 struct dwarf2_section_info
*, sect_offset
);
1239 static const char *read_indirect_string
1240 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1241 const struct comp_unit_head
*, unsigned int *);
1243 static const char *read_indirect_string_at_offset
1244 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1246 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1250 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1251 ULONGEST str_index
);
1253 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1254 ULONGEST str_index
);
1256 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1258 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1259 struct dwarf2_cu
*);
1261 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1262 struct dwarf2_cu
*cu
);
1264 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1266 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1267 struct dwarf2_cu
*cu
);
1269 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1271 static struct die_info
*die_specification (struct die_info
*die
,
1272 struct dwarf2_cu
**);
1274 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1275 struct dwarf2_cu
*cu
);
1277 static void dwarf_decode_lines (struct line_header
*, const char *,
1278 struct dwarf2_cu
*, dwarf2_psymtab
*,
1279 CORE_ADDR
, int decode_mapping
);
1281 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1284 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1285 struct dwarf2_cu
*, struct symbol
* = NULL
);
1287 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1288 struct dwarf2_cu
*);
1290 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1293 struct obstack
*obstack
,
1294 struct dwarf2_cu
*cu
, LONGEST
*value
,
1295 const gdb_byte
**bytes
,
1296 struct dwarf2_locexpr_baton
**baton
);
1298 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1300 static int need_gnat_info (struct dwarf2_cu
*);
1302 static struct type
*die_descriptive_type (struct die_info
*,
1303 struct dwarf2_cu
*);
1305 static void set_descriptive_type (struct type
*, struct die_info
*,
1306 struct dwarf2_cu
*);
1308 static struct type
*die_containing_type (struct die_info
*,
1309 struct dwarf2_cu
*);
1311 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1312 struct dwarf2_cu
*);
1314 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1316 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1318 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1320 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1321 const char *suffix
, int physname
,
1322 struct dwarf2_cu
*cu
);
1324 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1326 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1328 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1330 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1332 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1334 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1336 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1337 struct dwarf2_cu
*, dwarf2_psymtab
*);
1339 /* Return the .debug_loclists section to use for cu. */
1340 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1342 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1343 values. Keep the items ordered with increasing constraints compliance. */
1346 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1347 PC_BOUNDS_NOT_PRESENT
,
1349 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1350 were present but they do not form a valid range of PC addresses. */
1353 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1356 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1360 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1361 CORE_ADDR
*, CORE_ADDR
*,
1365 static void get_scope_pc_bounds (struct die_info
*,
1366 CORE_ADDR
*, CORE_ADDR
*,
1367 struct dwarf2_cu
*);
1369 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1370 CORE_ADDR
, struct dwarf2_cu
*);
1372 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1373 struct dwarf2_cu
*);
1375 static void dwarf2_attach_fields_to_type (struct field_info
*,
1376 struct type
*, struct dwarf2_cu
*);
1378 static void dwarf2_add_member_fn (struct field_info
*,
1379 struct die_info
*, struct type
*,
1380 struct dwarf2_cu
*);
1382 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1384 struct dwarf2_cu
*);
1386 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1388 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1390 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1392 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1394 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1396 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1398 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1400 static struct type
*read_module_type (struct die_info
*die
,
1401 struct dwarf2_cu
*cu
);
1403 static const char *namespace_name (struct die_info
*die
,
1404 int *is_anonymous
, struct dwarf2_cu
*);
1406 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1408 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1410 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1411 struct dwarf2_cu
*);
1413 static struct die_info
*read_die_and_siblings_1
1414 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1417 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1418 const gdb_byte
*info_ptr
,
1419 const gdb_byte
**new_info_ptr
,
1420 struct die_info
*parent
);
1422 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1423 struct die_info
**, const gdb_byte
*,
1426 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1427 struct die_info
**, const gdb_byte
*);
1429 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1431 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1434 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1436 static const char *dwarf2_full_name (const char *name
,
1437 struct die_info
*die
,
1438 struct dwarf2_cu
*cu
);
1440 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1441 struct dwarf2_cu
*cu
);
1443 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1444 struct dwarf2_cu
**);
1446 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1448 static void dump_die_for_error (struct die_info
*);
1450 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1453 /*static*/ void dump_die (struct die_info
*, int max_level
);
1455 static void store_in_ref_table (struct die_info
*,
1456 struct dwarf2_cu
*);
1458 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1459 const struct attribute
*,
1460 struct dwarf2_cu
**);
1462 static struct die_info
*follow_die_ref (struct die_info
*,
1463 const struct attribute
*,
1464 struct dwarf2_cu
**);
1466 static struct die_info
*follow_die_sig (struct die_info
*,
1467 const struct attribute
*,
1468 struct dwarf2_cu
**);
1470 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1471 struct dwarf2_cu
*);
1473 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1474 const struct attribute
*,
1475 struct dwarf2_cu
*);
1477 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1479 static void read_signatured_type (struct signatured_type
*);
1481 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1482 struct die_info
*die
, struct dwarf2_cu
*cu
,
1483 struct dynamic_prop
*prop
, struct type
*type
);
1485 /* memory allocation interface */
1487 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1489 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1491 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1493 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1494 struct dwarf2_loclist_baton
*baton
,
1495 const struct attribute
*attr
);
1497 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1499 struct dwarf2_cu
*cu
,
1502 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1503 const gdb_byte
*info_ptr
,
1504 struct abbrev_info
*abbrev
);
1506 static hashval_t
partial_die_hash (const void *item
);
1508 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1510 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1511 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1512 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1514 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1515 struct die_info
*comp_unit_die
,
1516 enum language pretend_language
);
1518 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1520 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1522 static struct type
*set_die_type (struct die_info
*, struct type
*,
1523 struct dwarf2_cu
*);
1525 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1527 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1529 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1532 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1535 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1538 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1539 struct dwarf2_per_cu_data
*);
1541 static void dwarf2_mark (struct dwarf2_cu
*);
1543 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1545 static struct type
*get_die_type_at_offset (sect_offset
,
1546 struct dwarf2_per_cu_data
*);
1548 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1550 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1551 enum language pretend_language
);
1553 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1555 /* Class, the destructor of which frees all allocated queue entries. This
1556 will only have work to do if an error was thrown while processing the
1557 dwarf. If no error was thrown then the queue entries should have all
1558 been processed, and freed, as we went along. */
1560 class dwarf2_queue_guard
1563 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1564 : m_per_objfile (per_objfile
)
1568 /* Free any entries remaining on the queue. There should only be
1569 entries left if we hit an error while processing the dwarf. */
1570 ~dwarf2_queue_guard ()
1572 /* Ensure that no memory is allocated by the queue. */
1573 std::queue
<dwarf2_queue_item
> empty
;
1574 std::swap (m_per_objfile
->queue
, empty
);
1577 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1580 dwarf2_per_objfile
*m_per_objfile
;
1583 dwarf2_queue_item::~dwarf2_queue_item ()
1585 /* Anything still marked queued is likely to be in an
1586 inconsistent state, so discard it. */
1589 if (per_cu
->cu
!= NULL
)
1590 free_one_cached_comp_unit (per_cu
);
1595 /* The return type of find_file_and_directory. Note, the enclosed
1596 string pointers are only valid while this object is valid. */
1598 struct file_and_directory
1600 /* The filename. This is never NULL. */
1603 /* The compilation directory. NULL if not known. If we needed to
1604 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1605 points directly to the DW_AT_comp_dir string attribute owned by
1606 the obstack that owns the DIE. */
1607 const char *comp_dir
;
1609 /* If we needed to build a new string for comp_dir, this is what
1610 owns the storage. */
1611 std::string comp_dir_storage
;
1614 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1615 struct dwarf2_cu
*cu
);
1617 static htab_up
allocate_signatured_type_table ();
1619 static htab_up
allocate_dwo_unit_table ();
1621 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1622 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1623 struct dwp_file
*dwp_file
, const char *comp_dir
,
1624 ULONGEST signature
, int is_debug_types
);
1626 static struct dwp_file
*get_dwp_file
1627 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1629 static struct dwo_unit
*lookup_dwo_comp_unit
1630 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1632 static struct dwo_unit
*lookup_dwo_type_unit
1633 (struct signatured_type
*, const char *, const char *);
1635 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1637 /* A unique pointer to a dwo_file. */
1639 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1641 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1643 static void check_producer (struct dwarf2_cu
*cu
);
1645 static void free_line_header_voidp (void *arg
);
1647 /* Various complaints about symbol reading that don't abort the process. */
1650 dwarf2_debug_line_missing_file_complaint (void)
1652 complaint (_(".debug_line section has line data without a file"));
1656 dwarf2_debug_line_missing_end_sequence_complaint (void)
1658 complaint (_(".debug_line section has line "
1659 "program sequence without an end"));
1663 dwarf2_complex_location_expr_complaint (void)
1665 complaint (_("location expression too complex"));
1669 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1672 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1677 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1679 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1683 /* Hash function for line_header_hash. */
1686 line_header_hash (const struct line_header
*ofs
)
1688 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1691 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1694 line_header_hash_voidp (const void *item
)
1696 const struct line_header
*ofs
= (const struct line_header
*) item
;
1698 return line_header_hash (ofs
);
1701 /* Equality function for line_header_hash. */
1704 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1706 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1707 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1709 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1710 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1715 /* See declaration. */
1717 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1718 const dwarf2_debug_sections
*names
,
1720 : objfile (objfile_
),
1721 can_copy (can_copy_
)
1724 names
= &dwarf2_elf_names
;
1726 bfd
*obfd
= objfile
->obfd
;
1728 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1729 locate_sections (obfd
, sec
, *names
);
1732 dwarf2_per_objfile::~dwarf2_per_objfile ()
1734 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1735 free_cached_comp_units ();
1737 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1738 per_cu
->imported_symtabs_free ();
1740 for (signatured_type
*sig_type
: all_type_units
)
1741 sig_type
->per_cu
.imported_symtabs_free ();
1743 /* Everything else should be on the objfile obstack. */
1746 /* See declaration. */
1749 dwarf2_per_objfile::free_cached_comp_units ()
1751 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1752 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1753 while (per_cu
!= NULL
)
1755 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1758 *last_chain
= next_cu
;
1763 /* A helper class that calls free_cached_comp_units on
1766 class free_cached_comp_units
1770 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1771 : m_per_objfile (per_objfile
)
1775 ~free_cached_comp_units ()
1777 m_per_objfile
->free_cached_comp_units ();
1780 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1784 dwarf2_per_objfile
*m_per_objfile
;
1787 /* Try to locate the sections we need for DWARF 2 debugging
1788 information and return true if we have enough to do something.
1789 NAMES points to the dwarf2 section names, or is NULL if the standard
1790 ELF names are used. CAN_COPY is true for formats where symbol
1791 interposition is possible and so symbol values must follow copy
1792 relocation rules. */
1795 dwarf2_has_info (struct objfile
*objfile
,
1796 const struct dwarf2_debug_sections
*names
,
1799 if (objfile
->flags
& OBJF_READNEVER
)
1802 struct dwarf2_per_objfile
*dwarf2_per_objfile
1803 = get_dwarf2_per_objfile (objfile
);
1805 if (dwarf2_per_objfile
== NULL
)
1806 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
1810 return (!dwarf2_per_objfile
->info
.is_virtual
1811 && dwarf2_per_objfile
->info
.s
.section
!= NULL
1812 && !dwarf2_per_objfile
->abbrev
.is_virtual
1813 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
1816 /* When loading sections, we look either for uncompressed section or for
1817 compressed section names. */
1820 section_is_p (const char *section_name
,
1821 const struct dwarf2_section_names
*names
)
1823 if (names
->normal
!= NULL
1824 && strcmp (section_name
, names
->normal
) == 0)
1826 if (names
->compressed
!= NULL
1827 && strcmp (section_name
, names
->compressed
) == 0)
1832 /* See declaration. */
1835 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
1836 const dwarf2_debug_sections
&names
)
1838 flagword aflag
= bfd_section_flags (sectp
);
1840 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1843 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1844 > bfd_get_file_size (abfd
))
1846 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1847 warning (_("Discarding section %s which has a section size (%s"
1848 ") larger than the file size [in module %s]"),
1849 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1850 bfd_get_filename (abfd
));
1852 else if (section_is_p (sectp
->name
, &names
.info
))
1854 this->info
.s
.section
= sectp
;
1855 this->info
.size
= bfd_section_size (sectp
);
1857 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1859 this->abbrev
.s
.section
= sectp
;
1860 this->abbrev
.size
= bfd_section_size (sectp
);
1862 else if (section_is_p (sectp
->name
, &names
.line
))
1864 this->line
.s
.section
= sectp
;
1865 this->line
.size
= bfd_section_size (sectp
);
1867 else if (section_is_p (sectp
->name
, &names
.loc
))
1869 this->loc
.s
.section
= sectp
;
1870 this->loc
.size
= bfd_section_size (sectp
);
1872 else if (section_is_p (sectp
->name
, &names
.loclists
))
1874 this->loclists
.s
.section
= sectp
;
1875 this->loclists
.size
= bfd_section_size (sectp
);
1877 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1879 this->macinfo
.s
.section
= sectp
;
1880 this->macinfo
.size
= bfd_section_size (sectp
);
1882 else if (section_is_p (sectp
->name
, &names
.macro
))
1884 this->macro
.s
.section
= sectp
;
1885 this->macro
.size
= bfd_section_size (sectp
);
1887 else if (section_is_p (sectp
->name
, &names
.str
))
1889 this->str
.s
.section
= sectp
;
1890 this->str
.size
= bfd_section_size (sectp
);
1892 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1894 this->str_offsets
.s
.section
= sectp
;
1895 this->str_offsets
.size
= bfd_section_size (sectp
);
1897 else if (section_is_p (sectp
->name
, &names
.line_str
))
1899 this->line_str
.s
.section
= sectp
;
1900 this->line_str
.size
= bfd_section_size (sectp
);
1902 else if (section_is_p (sectp
->name
, &names
.addr
))
1904 this->addr
.s
.section
= sectp
;
1905 this->addr
.size
= bfd_section_size (sectp
);
1907 else if (section_is_p (sectp
->name
, &names
.frame
))
1909 this->frame
.s
.section
= sectp
;
1910 this->frame
.size
= bfd_section_size (sectp
);
1912 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1914 this->eh_frame
.s
.section
= sectp
;
1915 this->eh_frame
.size
= bfd_section_size (sectp
);
1917 else if (section_is_p (sectp
->name
, &names
.ranges
))
1919 this->ranges
.s
.section
= sectp
;
1920 this->ranges
.size
= bfd_section_size (sectp
);
1922 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1924 this->rnglists
.s
.section
= sectp
;
1925 this->rnglists
.size
= bfd_section_size (sectp
);
1927 else if (section_is_p (sectp
->name
, &names
.types
))
1929 struct dwarf2_section_info type_section
;
1931 memset (&type_section
, 0, sizeof (type_section
));
1932 type_section
.s
.section
= sectp
;
1933 type_section
.size
= bfd_section_size (sectp
);
1935 this->types
.push_back (type_section
);
1937 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
1939 this->gdb_index
.s
.section
= sectp
;
1940 this->gdb_index
.size
= bfd_section_size (sectp
);
1942 else if (section_is_p (sectp
->name
, &names
.debug_names
))
1944 this->debug_names
.s
.section
= sectp
;
1945 this->debug_names
.size
= bfd_section_size (sectp
);
1947 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
1949 this->debug_aranges
.s
.section
= sectp
;
1950 this->debug_aranges
.size
= bfd_section_size (sectp
);
1953 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
1954 && bfd_section_vma (sectp
) == 0)
1955 this->has_section_at_zero
= true;
1958 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1962 dwarf2_get_section_info (struct objfile
*objfile
,
1963 enum dwarf2_section_enum sect
,
1964 asection
**sectp
, const gdb_byte
**bufp
,
1965 bfd_size_type
*sizep
)
1967 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
1968 struct dwarf2_section_info
*info
;
1970 /* We may see an objfile without any DWARF, in which case we just
1981 case DWARF2_DEBUG_FRAME
:
1982 info
= &data
->frame
;
1984 case DWARF2_EH_FRAME
:
1985 info
= &data
->eh_frame
;
1988 gdb_assert_not_reached ("unexpected section");
1991 info
->read (objfile
);
1993 *sectp
= info
->get_bfd_section ();
1994 *bufp
= info
->buffer
;
1995 *sizep
= info
->size
;
1998 /* A helper function to find the sections for a .dwz file. */
2001 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2003 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2005 /* Note that we only support the standard ELF names, because .dwz
2006 is ELF-only (at the time of writing). */
2007 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2009 dwz_file
->abbrev
.s
.section
= sectp
;
2010 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2012 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2014 dwz_file
->info
.s
.section
= sectp
;
2015 dwz_file
->info
.size
= bfd_section_size (sectp
);
2017 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2019 dwz_file
->str
.s
.section
= sectp
;
2020 dwz_file
->str
.size
= bfd_section_size (sectp
);
2022 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2024 dwz_file
->line
.s
.section
= sectp
;
2025 dwz_file
->line
.size
= bfd_section_size (sectp
);
2027 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2029 dwz_file
->macro
.s
.section
= sectp
;
2030 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2032 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2034 dwz_file
->gdb_index
.s
.section
= sectp
;
2035 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2037 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2039 dwz_file
->debug_names
.s
.section
= sectp
;
2040 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2044 /* See dwarf2read.h. */
2047 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2049 const char *filename
;
2050 bfd_size_type buildid_len_arg
;
2054 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2055 return dwarf2_per_objfile
->dwz_file
.get ();
2057 bfd_set_error (bfd_error_no_error
);
2058 gdb::unique_xmalloc_ptr
<char> data
2059 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2060 &buildid_len_arg
, &buildid
));
2063 if (bfd_get_error () == bfd_error_no_error
)
2065 error (_("could not read '.gnu_debugaltlink' section: %s"),
2066 bfd_errmsg (bfd_get_error ()));
2069 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2071 buildid_len
= (size_t) buildid_len_arg
;
2073 filename
= data
.get ();
2075 std::string abs_storage
;
2076 if (!IS_ABSOLUTE_PATH (filename
))
2078 gdb::unique_xmalloc_ptr
<char> abs
2079 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2081 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2082 filename
= abs_storage
.c_str ();
2085 /* First try the file name given in the section. If that doesn't
2086 work, try to use the build-id instead. */
2087 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2088 if (dwz_bfd
!= NULL
)
2090 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2091 dwz_bfd
.reset (nullptr);
2094 if (dwz_bfd
== NULL
)
2095 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2097 if (dwz_bfd
== nullptr)
2099 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2100 const char *origname
= dwarf2_per_objfile
->objfile
->original_name
;
2102 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2109 /* File successfully retrieved from server. */
2110 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
, -1);
2112 if (dwz_bfd
== nullptr)
2113 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2114 alt_filename
.get ());
2115 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2116 dwz_bfd
.reset (nullptr);
2120 if (dwz_bfd
== NULL
)
2121 error (_("could not find '.gnu_debugaltlink' file for %s"),
2122 objfile_name (dwarf2_per_objfile
->objfile
));
2124 std::unique_ptr
<struct dwz_file
> result
2125 (new struct dwz_file (std::move (dwz_bfd
)));
2127 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2130 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2131 result
->dwz_bfd
.get ());
2132 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2133 return dwarf2_per_objfile
->dwz_file
.get ();
2136 /* DWARF quick_symbols_functions support. */
2138 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2139 unique line tables, so we maintain a separate table of all .debug_line
2140 derived entries to support the sharing.
2141 All the quick functions need is the list of file names. We discard the
2142 line_header when we're done and don't need to record it here. */
2143 struct quick_file_names
2145 /* The data used to construct the hash key. */
2146 struct stmt_list_hash hash
;
2148 /* The number of entries in file_names, real_names. */
2149 unsigned int num_file_names
;
2151 /* The file names from the line table, after being run through
2153 const char **file_names
;
2155 /* The file names from the line table after being run through
2156 gdb_realpath. These are computed lazily. */
2157 const char **real_names
;
2160 /* When using the index (and thus not using psymtabs), each CU has an
2161 object of this type. This is used to hold information needed by
2162 the various "quick" methods. */
2163 struct dwarf2_per_cu_quick_data
2165 /* The file table. This can be NULL if there was no file table
2166 or it's currently not read in.
2167 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2168 struct quick_file_names
*file_names
;
2170 /* The corresponding symbol table. This is NULL if symbols for this
2171 CU have not yet been read. */
2172 struct compunit_symtab
*compunit_symtab
;
2174 /* A temporary mark bit used when iterating over all CUs in
2175 expand_symtabs_matching. */
2176 unsigned int mark
: 1;
2178 /* True if we've tried to read the file table and found there isn't one.
2179 There will be no point in trying to read it again next time. */
2180 unsigned int no_file_data
: 1;
2183 /* Utility hash function for a stmt_list_hash. */
2186 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2190 if (stmt_list_hash
->dwo_unit
!= NULL
)
2191 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2192 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2196 /* Utility equality function for a stmt_list_hash. */
2199 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2200 const struct stmt_list_hash
*rhs
)
2202 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2204 if (lhs
->dwo_unit
!= NULL
2205 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2208 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2211 /* Hash function for a quick_file_names. */
2214 hash_file_name_entry (const void *e
)
2216 const struct quick_file_names
*file_data
2217 = (const struct quick_file_names
*) e
;
2219 return hash_stmt_list_entry (&file_data
->hash
);
2222 /* Equality function for a quick_file_names. */
2225 eq_file_name_entry (const void *a
, const void *b
)
2227 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2228 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2230 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2233 /* Delete function for a quick_file_names. */
2236 delete_file_name_entry (void *e
)
2238 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2241 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2243 xfree ((void*) file_data
->file_names
[i
]);
2244 if (file_data
->real_names
)
2245 xfree ((void*) file_data
->real_names
[i
]);
2248 /* The space for the struct itself lives on objfile_obstack,
2249 so we don't free it here. */
2252 /* Create a quick_file_names hash table. */
2255 create_quick_file_names_table (unsigned int nr_initial_entries
)
2257 return htab_up (htab_create_alloc (nr_initial_entries
,
2258 hash_file_name_entry
, eq_file_name_entry
,
2259 delete_file_name_entry
, xcalloc
, xfree
));
2262 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2263 have to be created afterwards. You should call age_cached_comp_units after
2264 processing PER_CU->CU. dw2_setup must have been already called. */
2267 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2269 if (per_cu
->is_debug_types
)
2270 load_full_type_unit (per_cu
);
2272 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2274 if (per_cu
->cu
== NULL
)
2275 return; /* Dummy CU. */
2277 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2280 /* Read in the symbols for PER_CU. */
2283 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2285 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2287 /* Skip type_unit_groups, reading the type units they contain
2288 is handled elsewhere. */
2289 if (per_cu
->type_unit_group_p ())
2292 /* The destructor of dwarf2_queue_guard frees any entries left on
2293 the queue. After this point we're guaranteed to leave this function
2294 with the dwarf queue empty. */
2295 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2297 if (dwarf2_per_objfile
->using_index
2298 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2299 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2301 queue_comp_unit (per_cu
, language_minimal
);
2302 load_cu (per_cu
, skip_partial
);
2304 /* If we just loaded a CU from a DWO, and we're working with an index
2305 that may badly handle TUs, load all the TUs in that DWO as well.
2306 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2307 if (!per_cu
->is_debug_types
2308 && per_cu
->cu
!= NULL
2309 && per_cu
->cu
->dwo_unit
!= NULL
2310 && dwarf2_per_objfile
->index_table
!= NULL
2311 && dwarf2_per_objfile
->index_table
->version
<= 7
2312 /* DWP files aren't supported yet. */
2313 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2314 queue_and_load_all_dwo_tus (per_cu
);
2317 process_queue (dwarf2_per_objfile
);
2319 /* Age the cache, releasing compilation units that have not
2320 been used recently. */
2321 age_cached_comp_units (dwarf2_per_objfile
);
2324 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2325 the objfile from which this CU came. Returns the resulting symbol
2328 static struct compunit_symtab
*
2329 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2331 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2333 gdb_assert (dwarf2_per_objfile
->using_index
);
2334 if (!per_cu
->v
.quick
->compunit_symtab
)
2336 free_cached_comp_units
freer (dwarf2_per_objfile
);
2337 scoped_restore decrementer
= increment_reading_symtab ();
2338 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2339 process_cu_includes (dwarf2_per_objfile
);
2342 return per_cu
->v
.quick
->compunit_symtab
;
2345 /* See declaration. */
2347 dwarf2_per_cu_data
*
2348 dwarf2_per_objfile::get_cutu (int index
)
2350 if (index
>= this->all_comp_units
.size ())
2352 index
-= this->all_comp_units
.size ();
2353 gdb_assert (index
< this->all_type_units
.size ());
2354 return &this->all_type_units
[index
]->per_cu
;
2357 return this->all_comp_units
[index
];
2360 /* See declaration. */
2362 dwarf2_per_cu_data
*
2363 dwarf2_per_objfile::get_cu (int index
)
2365 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2367 return this->all_comp_units
[index
];
2370 /* See declaration. */
2373 dwarf2_per_objfile::get_tu (int index
)
2375 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2377 return this->all_type_units
[index
];
2380 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2381 objfile_obstack, and constructed with the specified field
2384 static dwarf2_per_cu_data
*
2385 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2386 struct dwarf2_section_info
*section
,
2388 sect_offset sect_off
, ULONGEST length
)
2390 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2391 dwarf2_per_cu_data
*the_cu
2392 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2393 struct dwarf2_per_cu_data
);
2394 the_cu
->sect_off
= sect_off
;
2395 the_cu
->length
= length
;
2396 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2397 the_cu
->section
= section
;
2398 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2399 struct dwarf2_per_cu_quick_data
);
2400 the_cu
->is_dwz
= is_dwz
;
2404 /* A helper for create_cus_from_index that handles a given list of
2408 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2409 const gdb_byte
*cu_list
, offset_type n_elements
,
2410 struct dwarf2_section_info
*section
,
2413 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2415 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2417 sect_offset sect_off
2418 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2419 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2422 dwarf2_per_cu_data
*per_cu
2423 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2425 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2429 /* Read the CU list from the mapped index, and use it to create all
2430 the CU objects for this objfile. */
2433 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2434 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2435 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2437 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2438 dwarf2_per_objfile
->all_comp_units
.reserve
2439 ((cu_list_elements
+ dwz_elements
) / 2);
2441 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2442 &dwarf2_per_objfile
->info
, 0);
2444 if (dwz_elements
== 0)
2447 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2448 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2452 /* Create the signatured type hash table from the index. */
2455 create_signatured_type_table_from_index
2456 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2457 struct dwarf2_section_info
*section
,
2458 const gdb_byte
*bytes
,
2459 offset_type elements
)
2461 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2463 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2464 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2466 htab_up sig_types_hash
= allocate_signatured_type_table ();
2468 for (offset_type i
= 0; i
< elements
; i
+= 3)
2470 struct signatured_type
*sig_type
;
2473 cu_offset type_offset_in_tu
;
2475 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2476 sect_offset sect_off
2477 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2479 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2481 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2484 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2485 struct signatured_type
);
2486 sig_type
->signature
= signature
;
2487 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2488 sig_type
->per_cu
.is_debug_types
= 1;
2489 sig_type
->per_cu
.section
= section
;
2490 sig_type
->per_cu
.sect_off
= sect_off
;
2491 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2492 sig_type
->per_cu
.v
.quick
2493 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2494 struct dwarf2_per_cu_quick_data
);
2496 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2499 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2502 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2505 /* Create the signatured type hash table from .debug_names. */
2508 create_signatured_type_table_from_debug_names
2509 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2510 const mapped_debug_names
&map
,
2511 struct dwarf2_section_info
*section
,
2512 struct dwarf2_section_info
*abbrev_section
)
2514 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2516 section
->read (objfile
);
2517 abbrev_section
->read (objfile
);
2519 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2520 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2522 htab_up sig_types_hash
= allocate_signatured_type_table ();
2524 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2526 struct signatured_type
*sig_type
;
2529 sect_offset sect_off
2530 = (sect_offset
) (extract_unsigned_integer
2531 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2533 map
.dwarf5_byte_order
));
2535 comp_unit_head cu_header
;
2536 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2538 section
->buffer
+ to_underlying (sect_off
),
2541 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2542 struct signatured_type
);
2543 sig_type
->signature
= cu_header
.signature
;
2544 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2545 sig_type
->per_cu
.is_debug_types
= 1;
2546 sig_type
->per_cu
.section
= section
;
2547 sig_type
->per_cu
.sect_off
= sect_off
;
2548 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2549 sig_type
->per_cu
.v
.quick
2550 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2551 struct dwarf2_per_cu_quick_data
);
2553 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2556 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2559 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2562 /* Read the address map data from the mapped index, and use it to
2563 populate the objfile's psymtabs_addrmap. */
2566 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2567 struct mapped_index
*index
)
2569 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2570 struct gdbarch
*gdbarch
= objfile
->arch ();
2571 const gdb_byte
*iter
, *end
;
2572 struct addrmap
*mutable_map
;
2575 auto_obstack temp_obstack
;
2577 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2579 iter
= index
->address_table
.data ();
2580 end
= iter
+ index
->address_table
.size ();
2582 baseaddr
= objfile
->text_section_offset ();
2586 ULONGEST hi
, lo
, cu_index
;
2587 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2589 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2591 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2596 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2597 hex_string (lo
), hex_string (hi
));
2601 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2603 complaint (_(".gdb_index address table has invalid CU number %u"),
2604 (unsigned) cu_index
);
2608 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2609 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2610 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2611 dwarf2_per_objfile
->get_cu (cu_index
));
2614 objfile
->partial_symtabs
->psymtabs_addrmap
2615 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2618 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2619 populate the objfile's psymtabs_addrmap. */
2622 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2623 struct dwarf2_section_info
*section
)
2625 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2626 bfd
*abfd
= objfile
->obfd
;
2627 struct gdbarch
*gdbarch
= objfile
->arch ();
2628 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2630 auto_obstack temp_obstack
;
2631 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2633 std::unordered_map
<sect_offset
,
2634 dwarf2_per_cu_data
*,
2635 gdb::hash_enum
<sect_offset
>>
2636 debug_info_offset_to_per_cu
;
2637 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2639 const auto insertpair
2640 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2641 if (!insertpair
.second
)
2643 warning (_("Section .debug_aranges in %s has duplicate "
2644 "debug_info_offset %s, ignoring .debug_aranges."),
2645 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2650 section
->read (objfile
);
2652 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2654 const gdb_byte
*addr
= section
->buffer
;
2656 while (addr
< section
->buffer
+ section
->size
)
2658 const gdb_byte
*const entry_addr
= addr
;
2659 unsigned int bytes_read
;
2661 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2665 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2666 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2667 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2668 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2670 warning (_("Section .debug_aranges in %s entry at offset %s "
2671 "length %s exceeds section length %s, "
2672 "ignoring .debug_aranges."),
2673 objfile_name (objfile
),
2674 plongest (entry_addr
- section
->buffer
),
2675 plongest (bytes_read
+ entry_length
),
2676 pulongest (section
->size
));
2680 /* The version number. */
2681 const uint16_t version
= read_2_bytes (abfd
, addr
);
2685 warning (_("Section .debug_aranges in %s entry at offset %s "
2686 "has unsupported version %d, ignoring .debug_aranges."),
2687 objfile_name (objfile
),
2688 plongest (entry_addr
- section
->buffer
), version
);
2692 const uint64_t debug_info_offset
2693 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2694 addr
+= offset_size
;
2695 const auto per_cu_it
2696 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2697 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2699 warning (_("Section .debug_aranges in %s entry at offset %s "
2700 "debug_info_offset %s does not exists, "
2701 "ignoring .debug_aranges."),
2702 objfile_name (objfile
),
2703 plongest (entry_addr
- section
->buffer
),
2704 pulongest (debug_info_offset
));
2707 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2709 const uint8_t address_size
= *addr
++;
2710 if (address_size
< 1 || address_size
> 8)
2712 warning (_("Section .debug_aranges in %s entry at offset %s "
2713 "address_size %u is invalid, ignoring .debug_aranges."),
2714 objfile_name (objfile
),
2715 plongest (entry_addr
- section
->buffer
), address_size
);
2719 const uint8_t segment_selector_size
= *addr
++;
2720 if (segment_selector_size
!= 0)
2722 warning (_("Section .debug_aranges in %s entry at offset %s "
2723 "segment_selector_size %u is not supported, "
2724 "ignoring .debug_aranges."),
2725 objfile_name (objfile
),
2726 plongest (entry_addr
- section
->buffer
),
2727 segment_selector_size
);
2731 /* Must pad to an alignment boundary that is twice the address
2732 size. It is undocumented by the DWARF standard but GCC does
2734 for (size_t padding
= ((-(addr
- section
->buffer
))
2735 & (2 * address_size
- 1));
2736 padding
> 0; padding
--)
2739 warning (_("Section .debug_aranges in %s entry at offset %s "
2740 "padding is not zero, ignoring .debug_aranges."),
2741 objfile_name (objfile
),
2742 plongest (entry_addr
- section
->buffer
));
2748 if (addr
+ 2 * address_size
> entry_end
)
2750 warning (_("Section .debug_aranges in %s entry at offset %s "
2751 "address list is not properly terminated, "
2752 "ignoring .debug_aranges."),
2753 objfile_name (objfile
),
2754 plongest (entry_addr
- section
->buffer
));
2757 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2759 addr
+= address_size
;
2760 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2762 addr
+= address_size
;
2763 if (start
== 0 && length
== 0)
2765 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
2767 /* Symbol was eliminated due to a COMDAT group. */
2770 ULONGEST end
= start
+ length
;
2771 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2773 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2775 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2779 objfile
->partial_symtabs
->psymtabs_addrmap
2780 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2783 /* Find a slot in the mapped index INDEX for the object named NAME.
2784 If NAME is found, set *VEC_OUT to point to the CU vector in the
2785 constant pool and return true. If NAME cannot be found, return
2789 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2790 offset_type
**vec_out
)
2793 offset_type slot
, step
;
2794 int (*cmp
) (const char *, const char *);
2796 gdb::unique_xmalloc_ptr
<char> without_params
;
2797 if (current_language
->la_language
== language_cplus
2798 || current_language
->la_language
== language_fortran
2799 || current_language
->la_language
== language_d
)
2801 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2804 if (strchr (name
, '(') != NULL
)
2806 without_params
= cp_remove_params (name
);
2808 if (without_params
!= NULL
)
2809 name
= without_params
.get ();
2813 /* Index version 4 did not support case insensitive searches. But the
2814 indices for case insensitive languages are built in lowercase, therefore
2815 simulate our NAME being searched is also lowercased. */
2816 hash
= mapped_index_string_hash ((index
->version
== 4
2817 && case_sensitivity
== case_sensitive_off
2818 ? 5 : index
->version
),
2821 slot
= hash
& (index
->symbol_table
.size () - 1);
2822 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2823 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2829 const auto &bucket
= index
->symbol_table
[slot
];
2830 if (bucket
.name
== 0 && bucket
.vec
== 0)
2833 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2834 if (!cmp (name
, str
))
2836 *vec_out
= (offset_type
*) (index
->constant_pool
2837 + MAYBE_SWAP (bucket
.vec
));
2841 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2845 /* A helper function that reads the .gdb_index from BUFFER and fills
2846 in MAP. FILENAME is the name of the file containing the data;
2847 it is used for error reporting. DEPRECATED_OK is true if it is
2848 ok to use deprecated sections.
2850 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2851 out parameters that are filled in with information about the CU and
2852 TU lists in the section.
2854 Returns true if all went well, false otherwise. */
2857 read_gdb_index_from_buffer (const char *filename
,
2859 gdb::array_view
<const gdb_byte
> buffer
,
2860 struct mapped_index
*map
,
2861 const gdb_byte
**cu_list
,
2862 offset_type
*cu_list_elements
,
2863 const gdb_byte
**types_list
,
2864 offset_type
*types_list_elements
)
2866 const gdb_byte
*addr
= &buffer
[0];
2868 /* Version check. */
2869 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2870 /* Versions earlier than 3 emitted every copy of a psymbol. This
2871 causes the index to behave very poorly for certain requests. Version 3
2872 contained incomplete addrmap. So, it seems better to just ignore such
2876 static int warning_printed
= 0;
2877 if (!warning_printed
)
2879 warning (_("Skipping obsolete .gdb_index section in %s."),
2881 warning_printed
= 1;
2885 /* Index version 4 uses a different hash function than index version
2888 Versions earlier than 6 did not emit psymbols for inlined
2889 functions. Using these files will cause GDB not to be able to
2890 set breakpoints on inlined functions by name, so we ignore these
2891 indices unless the user has done
2892 "set use-deprecated-index-sections on". */
2893 if (version
< 6 && !deprecated_ok
)
2895 static int warning_printed
= 0;
2896 if (!warning_printed
)
2899 Skipping deprecated .gdb_index section in %s.\n\
2900 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2901 to use the section anyway."),
2903 warning_printed
= 1;
2907 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2908 of the TU (for symbols coming from TUs),
2909 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2910 Plus gold-generated indices can have duplicate entries for global symbols,
2911 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2912 These are just performance bugs, and we can't distinguish gdb-generated
2913 indices from gold-generated ones, so issue no warning here. */
2915 /* Indexes with higher version than the one supported by GDB may be no
2916 longer backward compatible. */
2920 map
->version
= version
;
2922 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2925 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2926 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2930 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2931 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2932 - MAYBE_SWAP (metadata
[i
]))
2936 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2937 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2939 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2942 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2943 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2945 = gdb::array_view
<mapped_index::symbol_table_slot
>
2946 ((mapped_index::symbol_table_slot
*) symbol_table
,
2947 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2950 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2955 /* Callback types for dwarf2_read_gdb_index. */
2957 typedef gdb::function_view
2958 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
2959 get_gdb_index_contents_ftype
;
2960 typedef gdb::function_view
2961 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
2962 get_gdb_index_contents_dwz_ftype
;
2964 /* Read .gdb_index. If everything went ok, initialize the "quick"
2965 elements of all the CUs and return 1. Otherwise, return 0. */
2968 dwarf2_read_gdb_index
2969 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2970 get_gdb_index_contents_ftype get_gdb_index_contents
,
2971 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
2973 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2974 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2975 struct dwz_file
*dwz
;
2976 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2978 gdb::array_view
<const gdb_byte
> main_index_contents
2979 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
2981 if (main_index_contents
.empty ())
2984 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
2985 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
2986 use_deprecated_index_sections
,
2987 main_index_contents
, map
.get (), &cu_list
,
2988 &cu_list_elements
, &types_list
,
2989 &types_list_elements
))
2992 /* Don't use the index if it's empty. */
2993 if (map
->symbol_table
.empty ())
2996 /* If there is a .dwz file, read it so we can get its CU list as
2998 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3001 struct mapped_index dwz_map
;
3002 const gdb_byte
*dwz_types_ignore
;
3003 offset_type dwz_types_elements_ignore
;
3005 gdb::array_view
<const gdb_byte
> dwz_index_content
3006 = get_gdb_index_contents_dwz (objfile
, dwz
);
3008 if (dwz_index_content
.empty ())
3011 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3012 1, dwz_index_content
, &dwz_map
,
3013 &dwz_list
, &dwz_list_elements
,
3015 &dwz_types_elements_ignore
))
3017 warning (_("could not read '.gdb_index' section from %s; skipping"),
3018 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3023 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3024 dwz_list
, dwz_list_elements
);
3026 if (types_list_elements
)
3028 /* We can only handle a single .debug_types when we have an
3030 if (dwarf2_per_objfile
->types
.size () != 1)
3033 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3035 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3036 types_list
, types_list_elements
);
3039 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3041 dwarf2_per_objfile
->index_table
= std::move (map
);
3042 dwarf2_per_objfile
->using_index
= 1;
3043 dwarf2_per_objfile
->quick_file_names_table
=
3044 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3049 /* die_reader_func for dw2_get_file_names. */
3052 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3053 const gdb_byte
*info_ptr
,
3054 struct die_info
*comp_unit_die
)
3056 struct dwarf2_cu
*cu
= reader
->cu
;
3057 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3058 struct dwarf2_per_objfile
*dwarf2_per_objfile
3059 = cu
->per_cu
->dwarf2_per_objfile
;
3060 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3061 struct dwarf2_per_cu_data
*lh_cu
;
3062 struct attribute
*attr
;
3064 struct quick_file_names
*qfn
;
3066 gdb_assert (! this_cu
->is_debug_types
);
3068 /* Our callers never want to match partial units -- instead they
3069 will match the enclosing full CU. */
3070 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3072 this_cu
->v
.quick
->no_file_data
= 1;
3080 sect_offset line_offset
{};
3082 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3083 if (attr
!= nullptr)
3085 struct quick_file_names find_entry
;
3087 line_offset
= (sect_offset
) DW_UNSND (attr
);
3089 /* We may have already read in this line header (TU line header sharing).
3090 If we have we're done. */
3091 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3092 find_entry
.hash
.line_sect_off
= line_offset
;
3093 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
.get (),
3094 &find_entry
, INSERT
);
3097 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3101 lh
= dwarf_decode_line_header (line_offset
, cu
);
3105 lh_cu
->v
.quick
->no_file_data
= 1;
3109 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3110 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3111 qfn
->hash
.line_sect_off
= line_offset
;
3112 gdb_assert (slot
!= NULL
);
3115 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3118 if (strcmp (fnd
.name
, "<unknown>") != 0)
3121 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3123 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3125 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3126 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3127 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3128 fnd
.comp_dir
).release ();
3129 qfn
->real_names
= NULL
;
3131 lh_cu
->v
.quick
->file_names
= qfn
;
3134 /* A helper for the "quick" functions which attempts to read the line
3135 table for THIS_CU. */
3137 static struct quick_file_names
*
3138 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3140 /* This should never be called for TUs. */
3141 gdb_assert (! this_cu
->is_debug_types
);
3142 /* Nor type unit groups. */
3143 gdb_assert (! this_cu
->type_unit_group_p ());
3145 if (this_cu
->v
.quick
->file_names
!= NULL
)
3146 return this_cu
->v
.quick
->file_names
;
3147 /* If we know there is no line data, no point in looking again. */
3148 if (this_cu
->v
.quick
->no_file_data
)
3151 cutu_reader
reader (this_cu
);
3152 if (!reader
.dummy_p
)
3153 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3155 if (this_cu
->v
.quick
->no_file_data
)
3157 return this_cu
->v
.quick
->file_names
;
3160 /* A helper for the "quick" functions which computes and caches the
3161 real path for a given file name from the line table. */
3164 dw2_get_real_path (struct objfile
*objfile
,
3165 struct quick_file_names
*qfn
, int index
)
3167 if (qfn
->real_names
== NULL
)
3168 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3169 qfn
->num_file_names
, const char *);
3171 if (qfn
->real_names
[index
] == NULL
)
3172 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3174 return qfn
->real_names
[index
];
3177 static struct symtab
*
3178 dw2_find_last_source_symtab (struct objfile
*objfile
)
3180 struct dwarf2_per_objfile
*dwarf2_per_objfile
3181 = get_dwarf2_per_objfile (objfile
);
3182 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3183 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3188 return compunit_primary_filetab (cust
);
3191 /* Traversal function for dw2_forget_cached_source_info. */
3194 dw2_free_cached_file_names (void **slot
, void *info
)
3196 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3198 if (file_data
->real_names
)
3202 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3204 xfree ((void*) file_data
->real_names
[i
]);
3205 file_data
->real_names
[i
] = NULL
;
3213 dw2_forget_cached_source_info (struct objfile
*objfile
)
3215 struct dwarf2_per_objfile
*dwarf2_per_objfile
3216 = get_dwarf2_per_objfile (objfile
);
3218 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
.get (),
3219 dw2_free_cached_file_names
, NULL
);
3222 /* Helper function for dw2_map_symtabs_matching_filename that expands
3223 the symtabs and calls the iterator. */
3226 dw2_map_expand_apply (struct objfile
*objfile
,
3227 struct dwarf2_per_cu_data
*per_cu
,
3228 const char *name
, const char *real_path
,
3229 gdb::function_view
<bool (symtab
*)> callback
)
3231 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3233 /* Don't visit already-expanded CUs. */
3234 if (per_cu
->v
.quick
->compunit_symtab
)
3237 /* This may expand more than one symtab, and we want to iterate over
3239 dw2_instantiate_symtab (per_cu
, false);
3241 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3242 last_made
, callback
);
3245 /* Implementation of the map_symtabs_matching_filename method. */
3248 dw2_map_symtabs_matching_filename
3249 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3250 gdb::function_view
<bool (symtab
*)> callback
)
3252 const char *name_basename
= lbasename (name
);
3253 struct dwarf2_per_objfile
*dwarf2_per_objfile
3254 = get_dwarf2_per_objfile (objfile
);
3256 /* The rule is CUs specify all the files, including those used by
3257 any TU, so there's no need to scan TUs here. */
3259 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3261 /* We only need to look at symtabs not already expanded. */
3262 if (per_cu
->v
.quick
->compunit_symtab
)
3265 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3266 if (file_data
== NULL
)
3269 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3271 const char *this_name
= file_data
->file_names
[j
];
3272 const char *this_real_name
;
3274 if (compare_filenames_for_search (this_name
, name
))
3276 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3282 /* Before we invoke realpath, which can get expensive when many
3283 files are involved, do a quick comparison of the basenames. */
3284 if (! basenames_may_differ
3285 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3288 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3289 if (compare_filenames_for_search (this_real_name
, name
))
3291 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3297 if (real_path
!= NULL
)
3299 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3300 gdb_assert (IS_ABSOLUTE_PATH (name
));
3301 if (this_real_name
!= NULL
3302 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3304 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3316 /* Struct used to manage iterating over all CUs looking for a symbol. */
3318 struct dw2_symtab_iterator
3320 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3321 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3322 /* If set, only look for symbols that match that block. Valid values are
3323 GLOBAL_BLOCK and STATIC_BLOCK. */
3324 gdb::optional
<block_enum
> block_index
;
3325 /* The kind of symbol we're looking for. */
3327 /* The list of CUs from the index entry of the symbol,
3328 or NULL if not found. */
3330 /* The next element in VEC to look at. */
3332 /* The number of elements in VEC, or zero if there is no match. */
3334 /* Have we seen a global version of the symbol?
3335 If so we can ignore all further global instances.
3336 This is to work around gold/15646, inefficient gold-generated
3341 /* Initialize the index symtab iterator ITER. */
3344 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3345 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3346 gdb::optional
<block_enum
> block_index
,
3350 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3351 iter
->block_index
= block_index
;
3352 iter
->domain
= domain
;
3354 iter
->global_seen
= 0;
3356 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3358 /* index is NULL if OBJF_READNOW. */
3359 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3360 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3368 /* Return the next matching CU or NULL if there are no more. */
3370 static struct dwarf2_per_cu_data
*
3371 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3373 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3375 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3377 offset_type cu_index_and_attrs
=
3378 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3379 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3380 gdb_index_symbol_kind symbol_kind
=
3381 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3382 /* Only check the symbol attributes if they're present.
3383 Indices prior to version 7 don't record them,
3384 and indices >= 7 may elide them for certain symbols
3385 (gold does this). */
3387 (dwarf2_per_objfile
->index_table
->version
>= 7
3388 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3390 /* Don't crash on bad data. */
3391 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3392 + dwarf2_per_objfile
->all_type_units
.size ()))
3394 complaint (_(".gdb_index entry has bad CU index"
3396 objfile_name (dwarf2_per_objfile
->objfile
));
3400 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3402 /* Skip if already read in. */
3403 if (per_cu
->v
.quick
->compunit_symtab
)
3406 /* Check static vs global. */
3409 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3411 if (iter
->block_index
.has_value ())
3413 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3415 if (is_static
!= want_static
)
3419 /* Work around gold/15646. */
3420 if (!is_static
&& iter
->global_seen
)
3423 iter
->global_seen
= 1;
3426 /* Only check the symbol's kind if it has one. */
3429 switch (iter
->domain
)
3432 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3433 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3434 /* Some types are also in VAR_DOMAIN. */
3435 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3439 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3443 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3447 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3462 static struct compunit_symtab
*
3463 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3464 const char *name
, domain_enum domain
)
3466 struct compunit_symtab
*stab_best
= NULL
;
3467 struct dwarf2_per_objfile
*dwarf2_per_objfile
3468 = get_dwarf2_per_objfile (objfile
);
3470 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3472 struct dw2_symtab_iterator iter
;
3473 struct dwarf2_per_cu_data
*per_cu
;
3475 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3477 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3479 struct symbol
*sym
, *with_opaque
= NULL
;
3480 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3481 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3482 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3484 sym
= block_find_symbol (block
, name
, domain
,
3485 block_find_non_opaque_type_preferred
,
3488 /* Some caution must be observed with overloaded functions
3489 and methods, since the index will not contain any overload
3490 information (but NAME might contain it). */
3493 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3495 if (with_opaque
!= NULL
3496 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3499 /* Keep looking through other CUs. */
3506 dw2_print_stats (struct objfile
*objfile
)
3508 struct dwarf2_per_objfile
*dwarf2_per_objfile
3509 = get_dwarf2_per_objfile (objfile
);
3510 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3511 + dwarf2_per_objfile
->all_type_units
.size ());
3514 for (int i
= 0; i
< total
; ++i
)
3516 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3518 if (!per_cu
->v
.quick
->compunit_symtab
)
3521 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3522 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3525 /* This dumps minimal information about the index.
3526 It is called via "mt print objfiles".
3527 One use is to verify .gdb_index has been loaded by the
3528 gdb.dwarf2/gdb-index.exp testcase. */
3531 dw2_dump (struct objfile
*objfile
)
3533 struct dwarf2_per_objfile
*dwarf2_per_objfile
3534 = get_dwarf2_per_objfile (objfile
);
3536 gdb_assert (dwarf2_per_objfile
->using_index
);
3537 printf_filtered (".gdb_index:");
3538 if (dwarf2_per_objfile
->index_table
!= NULL
)
3540 printf_filtered (" version %d\n",
3541 dwarf2_per_objfile
->index_table
->version
);
3544 printf_filtered (" faked for \"readnow\"\n");
3545 printf_filtered ("\n");
3549 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3550 const char *func_name
)
3552 struct dwarf2_per_objfile
*dwarf2_per_objfile
3553 = get_dwarf2_per_objfile (objfile
);
3555 struct dw2_symtab_iterator iter
;
3556 struct dwarf2_per_cu_data
*per_cu
;
3558 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3560 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3561 dw2_instantiate_symtab (per_cu
, false);
3566 dw2_expand_all_symtabs (struct objfile
*objfile
)
3568 struct dwarf2_per_objfile
*dwarf2_per_objfile
3569 = get_dwarf2_per_objfile (objfile
);
3570 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3571 + dwarf2_per_objfile
->all_type_units
.size ());
3573 for (int i
= 0; i
< total_units
; ++i
)
3575 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3577 /* We don't want to directly expand a partial CU, because if we
3578 read it with the wrong language, then assertion failures can
3579 be triggered later on. See PR symtab/23010. So, tell
3580 dw2_instantiate_symtab to skip partial CUs -- any important
3581 partial CU will be read via DW_TAG_imported_unit anyway. */
3582 dw2_instantiate_symtab (per_cu
, true);
3587 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3588 const char *fullname
)
3590 struct dwarf2_per_objfile
*dwarf2_per_objfile
3591 = get_dwarf2_per_objfile (objfile
);
3593 /* We don't need to consider type units here.
3594 This is only called for examining code, e.g. expand_line_sal.
3595 There can be an order of magnitude (or more) more type units
3596 than comp units, and we avoid them if we can. */
3598 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3600 /* We only need to look at symtabs not already expanded. */
3601 if (per_cu
->v
.quick
->compunit_symtab
)
3604 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3605 if (file_data
== NULL
)
3608 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3610 const char *this_fullname
= file_data
->file_names
[j
];
3612 if (filename_cmp (this_fullname
, fullname
) == 0)
3614 dw2_instantiate_symtab (per_cu
, false);
3622 dw2_map_matching_symbols
3623 (struct objfile
*objfile
,
3624 const lookup_name_info
&name
, domain_enum domain
,
3626 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3627 symbol_compare_ftype
*ordered_compare
)
3630 struct dwarf2_per_objfile
*dwarf2_per_objfile
3631 = get_dwarf2_per_objfile (objfile
);
3633 if (dwarf2_per_objfile
->index_table
!= nullptr)
3635 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3636 here though if the current language is Ada for a non-Ada objfile
3637 using GNU index. As Ada does not look for non-Ada symbols this
3638 function should just return. */
3642 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3643 inline psym_map_matching_symbols here, assuming all partial symtabs have
3645 const int block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3647 for (compunit_symtab
*cust
: objfile
->compunits ())
3649 const struct block
*block
;
3653 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3654 if (!iterate_over_symbols_terminated (block
, name
,
3660 /* Starting from a search name, return the string that finds the upper
3661 bound of all strings that start with SEARCH_NAME in a sorted name
3662 list. Returns the empty string to indicate that the upper bound is
3663 the end of the list. */
3666 make_sort_after_prefix_name (const char *search_name
)
3668 /* When looking to complete "func", we find the upper bound of all
3669 symbols that start with "func" by looking for where we'd insert
3670 the closest string that would follow "func" in lexicographical
3671 order. Usually, that's "func"-with-last-character-incremented,
3672 i.e. "fund". Mind non-ASCII characters, though. Usually those
3673 will be UTF-8 multi-byte sequences, but we can't be certain.
3674 Especially mind the 0xff character, which is a valid character in
3675 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3676 rule out compilers allowing it in identifiers. Note that
3677 conveniently, strcmp/strcasecmp are specified to compare
3678 characters interpreted as unsigned char. So what we do is treat
3679 the whole string as a base 256 number composed of a sequence of
3680 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3681 to 0, and carries 1 to the following more-significant position.
3682 If the very first character in SEARCH_NAME ends up incremented
3683 and carries/overflows, then the upper bound is the end of the
3684 list. The string after the empty string is also the empty
3687 Some examples of this operation:
3689 SEARCH_NAME => "+1" RESULT
3693 "\xff" "a" "\xff" => "\xff" "b"
3698 Then, with these symbols for example:
3704 completing "func" looks for symbols between "func" and
3705 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3706 which finds "func" and "func1", but not "fund".
3710 funcÿ (Latin1 'ÿ' [0xff])
3714 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3715 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3719 ÿÿ (Latin1 'ÿ' [0xff])
3722 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3723 the end of the list.
3725 std::string after
= search_name
;
3726 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3728 if (!after
.empty ())
3729 after
.back () = (unsigned char) after
.back () + 1;
3733 /* See declaration. */
3735 std::pair
<std::vector
<name_component
>::const_iterator
,
3736 std::vector
<name_component
>::const_iterator
>
3737 mapped_index_base::find_name_components_bounds
3738 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3741 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3743 const char *lang_name
3744 = lookup_name_without_params
.language_lookup_name (lang
);
3746 /* Comparison function object for lower_bound that matches against a
3747 given symbol name. */
3748 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3751 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3752 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3753 return name_cmp (elem_name
, name
) < 0;
3756 /* Comparison function object for upper_bound that matches against a
3757 given symbol name. */
3758 auto lookup_compare_upper
= [&] (const char *name
,
3759 const name_component
&elem
)
3761 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3762 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3763 return name_cmp (name
, elem_name
) < 0;
3766 auto begin
= this->name_components
.begin ();
3767 auto end
= this->name_components
.end ();
3769 /* Find the lower bound. */
3772 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3775 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3778 /* Find the upper bound. */
3781 if (lookup_name_without_params
.completion_mode ())
3783 /* In completion mode, we want UPPER to point past all
3784 symbols names that have the same prefix. I.e., with
3785 these symbols, and completing "func":
3787 function << lower bound
3789 other_function << upper bound
3791 We find the upper bound by looking for the insertion
3792 point of "func"-with-last-character-incremented,
3794 std::string after
= make_sort_after_prefix_name (lang_name
);
3797 return std::lower_bound (lower
, end
, after
.c_str (),
3798 lookup_compare_lower
);
3801 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3804 return {lower
, upper
};
3807 /* See declaration. */
3810 mapped_index_base::build_name_components ()
3812 if (!this->name_components
.empty ())
3815 this->name_components_casing
= case_sensitivity
;
3817 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3819 /* The code below only knows how to break apart components of C++
3820 symbol names (and other languages that use '::' as
3821 namespace/module separator) and Ada symbol names. */
3822 auto count
= this->symbol_name_count ();
3823 for (offset_type idx
= 0; idx
< count
; idx
++)
3825 if (this->symbol_name_slot_invalid (idx
))
3828 const char *name
= this->symbol_name_at (idx
);
3830 /* Add each name component to the name component table. */
3831 unsigned int previous_len
= 0;
3833 if (strstr (name
, "::") != nullptr)
3835 for (unsigned int current_len
= cp_find_first_component (name
);
3836 name
[current_len
] != '\0';
3837 current_len
+= cp_find_first_component (name
+ current_len
))
3839 gdb_assert (name
[current_len
] == ':');
3840 this->name_components
.push_back ({previous_len
, idx
});
3841 /* Skip the '::'. */
3843 previous_len
= current_len
;
3848 /* Handle the Ada encoded (aka mangled) form here. */
3849 for (const char *iter
= strstr (name
, "__");
3851 iter
= strstr (iter
, "__"))
3853 this->name_components
.push_back ({previous_len
, idx
});
3855 previous_len
= iter
- name
;
3859 this->name_components
.push_back ({previous_len
, idx
});
3862 /* Sort name_components elements by name. */
3863 auto name_comp_compare
= [&] (const name_component
&left
,
3864 const name_component
&right
)
3866 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3867 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3869 const char *left_name
= left_qualified
+ left
.name_offset
;
3870 const char *right_name
= right_qualified
+ right
.name_offset
;
3872 return name_cmp (left_name
, right_name
) < 0;
3875 std::sort (this->name_components
.begin (),
3876 this->name_components
.end (),
3880 /* Helper for dw2_expand_symtabs_matching that works with a
3881 mapped_index_base instead of the containing objfile. This is split
3882 to a separate function in order to be able to unit test the
3883 name_components matching using a mock mapped_index_base. For each
3884 symbol name that matches, calls MATCH_CALLBACK, passing it the
3885 symbol's index in the mapped_index_base symbol table. */
3888 dw2_expand_symtabs_matching_symbol
3889 (mapped_index_base
&index
,
3890 const lookup_name_info
&lookup_name_in
,
3891 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3892 enum search_domain kind
,
3893 gdb::function_view
<bool (offset_type
)> match_callback
)
3895 lookup_name_info lookup_name_without_params
3896 = lookup_name_in
.make_ignore_params ();
3898 /* Build the symbol name component sorted vector, if we haven't
3900 index
.build_name_components ();
3902 /* The same symbol may appear more than once in the range though.
3903 E.g., if we're looking for symbols that complete "w", and we have
3904 a symbol named "w1::w2", we'll find the two name components for
3905 that same symbol in the range. To be sure we only call the
3906 callback once per symbol, we first collect the symbol name
3907 indexes that matched in a temporary vector and ignore
3909 std::vector
<offset_type
> matches
;
3911 struct name_and_matcher
3913 symbol_name_matcher_ftype
*matcher
;
3914 const std::string
&name
;
3916 bool operator== (const name_and_matcher
&other
) const
3918 return matcher
== other
.matcher
&& name
== other
.name
;
3922 /* A vector holding all the different symbol name matchers, for all
3924 std::vector
<name_and_matcher
> matchers
;
3926 for (int i
= 0; i
< nr_languages
; i
++)
3928 enum language lang_e
= (enum language
) i
;
3930 const language_defn
*lang
= language_def (lang_e
);
3931 symbol_name_matcher_ftype
*name_matcher
3932 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
3934 name_and_matcher key
{
3936 lookup_name_without_params
.language_lookup_name (lang_e
)
3939 /* Don't insert the same comparison routine more than once.
3940 Note that we do this linear walk. This is not a problem in
3941 practice because the number of supported languages is
3943 if (std::find (matchers
.begin (), matchers
.end (), key
)
3946 matchers
.push_back (std::move (key
));
3949 = index
.find_name_components_bounds (lookup_name_without_params
,
3952 /* Now for each symbol name in range, check to see if we have a name
3953 match, and if so, call the MATCH_CALLBACK callback. */
3955 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
3957 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
3959 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
3960 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
3963 matches
.push_back (bounds
.first
->idx
);
3967 std::sort (matches
.begin (), matches
.end ());
3969 /* Finally call the callback, once per match. */
3971 for (offset_type idx
: matches
)
3975 if (!match_callback (idx
))
3981 /* Above we use a type wider than idx's for 'prev', since 0 and
3982 (offset_type)-1 are both possible values. */
3983 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
3988 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
3990 /* A mock .gdb_index/.debug_names-like name index table, enough to
3991 exercise dw2_expand_symtabs_matching_symbol, which works with the
3992 mapped_index_base interface. Builds an index from the symbol list
3993 passed as parameter to the constructor. */
3994 class mock_mapped_index
: public mapped_index_base
3997 mock_mapped_index (gdb::array_view
<const char *> symbols
)
3998 : m_symbol_table (symbols
)
4001 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4003 /* Return the number of names in the symbol table. */
4004 size_t symbol_name_count () const override
4006 return m_symbol_table
.size ();
4009 /* Get the name of the symbol at IDX in the symbol table. */
4010 const char *symbol_name_at (offset_type idx
) const override
4012 return m_symbol_table
[idx
];
4016 gdb::array_view
<const char *> m_symbol_table
;
4019 /* Convenience function that converts a NULL pointer to a "<null>"
4020 string, to pass to print routines. */
4023 string_or_null (const char *str
)
4025 return str
!= NULL
? str
: "<null>";
4028 /* Check if a lookup_name_info built from
4029 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4030 index. EXPECTED_LIST is the list of expected matches, in expected
4031 matching order. If no match expected, then an empty list is
4032 specified. Returns true on success. On failure prints a warning
4033 indicating the file:line that failed, and returns false. */
4036 check_match (const char *file
, int line
,
4037 mock_mapped_index
&mock_index
,
4038 const char *name
, symbol_name_match_type match_type
,
4039 bool completion_mode
,
4040 std::initializer_list
<const char *> expected_list
)
4042 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4044 bool matched
= true;
4046 auto mismatch
= [&] (const char *expected_str
,
4049 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4050 "expected=\"%s\", got=\"%s\"\n"),
4052 (match_type
== symbol_name_match_type::FULL
4054 name
, string_or_null (expected_str
), string_or_null (got
));
4058 auto expected_it
= expected_list
.begin ();
4059 auto expected_end
= expected_list
.end ();
4061 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4063 [&] (offset_type idx
)
4065 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4066 const char *expected_str
4067 = expected_it
== expected_end
? NULL
: *expected_it
++;
4069 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4070 mismatch (expected_str
, matched_name
);
4074 const char *expected_str
4075 = expected_it
== expected_end
? NULL
: *expected_it
++;
4076 if (expected_str
!= NULL
)
4077 mismatch (expected_str
, NULL
);
4082 /* The symbols added to the mock mapped_index for testing (in
4084 static const char *test_symbols
[] = {
4093 "ns2::tmpl<int>::foo2",
4094 "(anonymous namespace)::A::B::C",
4096 /* These are used to check that the increment-last-char in the
4097 matching algorithm for completion doesn't match "t1_fund" when
4098 completing "t1_func". */
4104 /* A UTF-8 name with multi-byte sequences to make sure that
4105 cp-name-parser understands this as a single identifier ("função"
4106 is "function" in PT). */
4109 /* \377 (0xff) is Latin1 'ÿ'. */
4112 /* \377 (0xff) is Latin1 'ÿ'. */
4116 /* A name with all sorts of complications. Starts with "z" to make
4117 it easier for the completion tests below. */
4118 #define Z_SYM_NAME \
4119 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4120 "::tuple<(anonymous namespace)::ui*, " \
4121 "std::default_delete<(anonymous namespace)::ui>, void>"
4126 /* Returns true if the mapped_index_base::find_name_component_bounds
4127 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4128 in completion mode. */
4131 check_find_bounds_finds (mapped_index_base
&index
,
4132 const char *search_name
,
4133 gdb::array_view
<const char *> expected_syms
)
4135 lookup_name_info
lookup_name (search_name
,
4136 symbol_name_match_type::FULL
, true);
4138 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4141 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4142 if (distance
!= expected_syms
.size ())
4145 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4147 auto nc_elem
= bounds
.first
+ exp_elem
;
4148 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4149 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4156 /* Test the lower-level mapped_index::find_name_component_bounds
4160 test_mapped_index_find_name_component_bounds ()
4162 mock_mapped_index
mock_index (test_symbols
);
4164 mock_index
.build_name_components ();
4166 /* Test the lower-level mapped_index::find_name_component_bounds
4167 method in completion mode. */
4169 static const char *expected_syms
[] = {
4174 SELF_CHECK (check_find_bounds_finds (mock_index
,
4175 "t1_func", expected_syms
));
4178 /* Check that the increment-last-char in the name matching algorithm
4179 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4181 static const char *expected_syms1
[] = {
4185 SELF_CHECK (check_find_bounds_finds (mock_index
,
4186 "\377", expected_syms1
));
4188 static const char *expected_syms2
[] = {
4191 SELF_CHECK (check_find_bounds_finds (mock_index
,
4192 "\377\377", expected_syms2
));
4196 /* Test dw2_expand_symtabs_matching_symbol. */
4199 test_dw2_expand_symtabs_matching_symbol ()
4201 mock_mapped_index
mock_index (test_symbols
);
4203 /* We let all tests run until the end even if some fails, for debug
4205 bool any_mismatch
= false;
4207 /* Create the expected symbols list (an initializer_list). Needed
4208 because lists have commas, and we need to pass them to CHECK,
4209 which is a macro. */
4210 #define EXPECT(...) { __VA_ARGS__ }
4212 /* Wrapper for check_match that passes down the current
4213 __FILE__/__LINE__. */
4214 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4215 any_mismatch |= !check_match (__FILE__, __LINE__, \
4217 NAME, MATCH_TYPE, COMPLETION_MODE, \
4220 /* Identity checks. */
4221 for (const char *sym
: test_symbols
)
4223 /* Should be able to match all existing symbols. */
4224 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4227 /* Should be able to match all existing symbols with
4229 std::string with_params
= std::string (sym
) + "(int)";
4230 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4233 /* Should be able to match all existing symbols with
4234 parameters and qualifiers. */
4235 with_params
= std::string (sym
) + " ( int ) const";
4236 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4239 /* This should really find sym, but cp-name-parser.y doesn't
4240 know about lvalue/rvalue qualifiers yet. */
4241 with_params
= std::string (sym
) + " ( int ) &&";
4242 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4246 /* Check that the name matching algorithm for completion doesn't get
4247 confused with Latin1 'ÿ' / 0xff. */
4249 static const char str
[] = "\377";
4250 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4251 EXPECT ("\377", "\377\377123"));
4254 /* Check that the increment-last-char in the matching algorithm for
4255 completion doesn't match "t1_fund" when completing "t1_func". */
4257 static const char str
[] = "t1_func";
4258 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4259 EXPECT ("t1_func", "t1_func1"));
4262 /* Check that completion mode works at each prefix of the expected
4265 static const char str
[] = "function(int)";
4266 size_t len
= strlen (str
);
4269 for (size_t i
= 1; i
< len
; i
++)
4271 lookup
.assign (str
, i
);
4272 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4273 EXPECT ("function"));
4277 /* While "w" is a prefix of both components, the match function
4278 should still only be called once. */
4280 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4282 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4286 /* Same, with a "complicated" symbol. */
4288 static const char str
[] = Z_SYM_NAME
;
4289 size_t len
= strlen (str
);
4292 for (size_t i
= 1; i
< len
; i
++)
4294 lookup
.assign (str
, i
);
4295 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4296 EXPECT (Z_SYM_NAME
));
4300 /* In FULL mode, an incomplete symbol doesn't match. */
4302 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4306 /* A complete symbol with parameters matches any overload, since the
4307 index has no overload info. */
4309 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4310 EXPECT ("std::zfunction", "std::zfunction2"));
4311 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4312 EXPECT ("std::zfunction", "std::zfunction2"));
4313 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4314 EXPECT ("std::zfunction", "std::zfunction2"));
4317 /* Check that whitespace is ignored appropriately. A symbol with a
4318 template argument list. */
4320 static const char expected
[] = "ns::foo<int>";
4321 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4323 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4327 /* Check that whitespace is ignored appropriately. A symbol with a
4328 template argument list that includes a pointer. */
4330 static const char expected
[] = "ns::foo<char*>";
4331 /* Try both completion and non-completion modes. */
4332 static const bool completion_mode
[2] = {false, true};
4333 for (size_t i
= 0; i
< 2; i
++)
4335 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4336 completion_mode
[i
], EXPECT (expected
));
4337 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4338 completion_mode
[i
], EXPECT (expected
));
4340 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4341 completion_mode
[i
], EXPECT (expected
));
4342 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4343 completion_mode
[i
], EXPECT (expected
));
4348 /* Check method qualifiers are ignored. */
4349 static const char expected
[] = "ns::foo<char*>";
4350 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4351 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4352 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4353 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4354 CHECK_MATCH ("foo < char * > ( int ) const",
4355 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4356 CHECK_MATCH ("foo < char * > ( int ) &&",
4357 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4360 /* Test lookup names that don't match anything. */
4362 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4365 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4369 /* Some wild matching tests, exercising "(anonymous namespace)",
4370 which should not be confused with a parameter list. */
4372 static const char *syms
[] = {
4376 "A :: B :: C ( int )",
4381 for (const char *s
: syms
)
4383 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4384 EXPECT ("(anonymous namespace)::A::B::C"));
4389 static const char expected
[] = "ns2::tmpl<int>::foo2";
4390 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4392 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4396 SELF_CHECK (!any_mismatch
);
4405 test_mapped_index_find_name_component_bounds ();
4406 test_dw2_expand_symtabs_matching_symbol ();
4409 }} // namespace selftests::dw2_expand_symtabs_matching
4411 #endif /* GDB_SELF_TEST */
4413 /* If FILE_MATCHER is NULL or if PER_CU has
4414 dwarf2_per_cu_quick_data::MARK set (see
4415 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4416 EXPANSION_NOTIFY on it. */
4419 dw2_expand_symtabs_matching_one
4420 (struct dwarf2_per_cu_data
*per_cu
,
4421 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4422 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4424 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4426 bool symtab_was_null
4427 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4429 dw2_instantiate_symtab (per_cu
, false);
4431 if (expansion_notify
!= NULL
4433 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4434 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4438 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4439 matched, to expand corresponding CUs that were marked. IDX is the
4440 index of the symbol name that matched. */
4443 dw2_expand_marked_cus
4444 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4445 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4446 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4449 offset_type
*vec
, vec_len
, vec_idx
;
4450 bool global_seen
= false;
4451 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4453 vec
= (offset_type
*) (index
.constant_pool
4454 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4455 vec_len
= MAYBE_SWAP (vec
[0]);
4456 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4458 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4459 /* This value is only valid for index versions >= 7. */
4460 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4461 gdb_index_symbol_kind symbol_kind
=
4462 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4463 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4464 /* Only check the symbol attributes if they're present.
4465 Indices prior to version 7 don't record them,
4466 and indices >= 7 may elide them for certain symbols
4467 (gold does this). */
4470 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4472 /* Work around gold/15646. */
4475 if (!is_static
&& global_seen
)
4481 /* Only check the symbol's kind if it has one. */
4486 case VARIABLES_DOMAIN
:
4487 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4490 case FUNCTIONS_DOMAIN
:
4491 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4495 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4498 case MODULES_DOMAIN
:
4499 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4507 /* Don't crash on bad data. */
4508 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4509 + dwarf2_per_objfile
->all_type_units
.size ()))
4511 complaint (_(".gdb_index entry has bad CU index"
4513 objfile_name (dwarf2_per_objfile
->objfile
));
4517 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4518 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4523 /* If FILE_MATCHER is non-NULL, set all the
4524 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4525 that match FILE_MATCHER. */
4528 dw_expand_symtabs_matching_file_matcher
4529 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4530 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4532 if (file_matcher
== NULL
)
4535 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4537 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4539 NULL
, xcalloc
, xfree
));
4540 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4542 NULL
, xcalloc
, xfree
));
4544 /* The rule is CUs specify all the files, including those used by
4545 any TU, so there's no need to scan TUs here. */
4547 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4551 per_cu
->v
.quick
->mark
= 0;
4553 /* We only need to look at symtabs not already expanded. */
4554 if (per_cu
->v
.quick
->compunit_symtab
)
4557 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4558 if (file_data
== NULL
)
4561 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4563 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4565 per_cu
->v
.quick
->mark
= 1;
4569 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4571 const char *this_real_name
;
4573 if (file_matcher (file_data
->file_names
[j
], false))
4575 per_cu
->v
.quick
->mark
= 1;
4579 /* Before we invoke realpath, which can get expensive when many
4580 files are involved, do a quick comparison of the basenames. */
4581 if (!basenames_may_differ
4582 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4586 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4587 if (file_matcher (this_real_name
, false))
4589 per_cu
->v
.quick
->mark
= 1;
4594 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4595 ? visited_found
.get ()
4596 : visited_not_found
.get (),
4603 dw2_expand_symtabs_matching
4604 (struct objfile
*objfile
,
4605 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4606 const lookup_name_info
*lookup_name
,
4607 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4608 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4609 enum search_domain kind
)
4611 struct dwarf2_per_objfile
*dwarf2_per_objfile
4612 = get_dwarf2_per_objfile (objfile
);
4614 /* index_table is NULL if OBJF_READNOW. */
4615 if (!dwarf2_per_objfile
->index_table
)
4618 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4620 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4622 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4626 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4632 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4634 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4636 kind
, [&] (offset_type idx
)
4638 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4639 expansion_notify
, kind
);
4644 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4647 static struct compunit_symtab
*
4648 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4653 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4654 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4657 if (cust
->includes
== NULL
)
4660 for (i
= 0; cust
->includes
[i
]; ++i
)
4662 struct compunit_symtab
*s
= cust
->includes
[i
];
4664 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4672 static struct compunit_symtab
*
4673 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4674 struct bound_minimal_symbol msymbol
,
4676 struct obj_section
*section
,
4679 struct dwarf2_per_cu_data
*data
;
4680 struct compunit_symtab
*result
;
4682 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4685 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4686 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4687 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4691 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4692 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4693 paddress (objfile
->arch (), pc
));
4696 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4699 gdb_assert (result
!= NULL
);
4704 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4705 void *data
, int need_fullname
)
4707 struct dwarf2_per_objfile
*dwarf2_per_objfile
4708 = get_dwarf2_per_objfile (objfile
);
4710 if (!dwarf2_per_objfile
->filenames_cache
)
4712 dwarf2_per_objfile
->filenames_cache
.emplace ();
4714 htab_up
visited (htab_create_alloc (10,
4715 htab_hash_pointer
, htab_eq_pointer
,
4716 NULL
, xcalloc
, xfree
));
4718 /* The rule is CUs specify all the files, including those used
4719 by any TU, so there's no need to scan TUs here. We can
4720 ignore file names coming from already-expanded CUs. */
4722 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4724 if (per_cu
->v
.quick
->compunit_symtab
)
4726 void **slot
= htab_find_slot (visited
.get (),
4727 per_cu
->v
.quick
->file_names
,
4730 *slot
= per_cu
->v
.quick
->file_names
;
4734 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4736 /* We only need to look at symtabs not already expanded. */
4737 if (per_cu
->v
.quick
->compunit_symtab
)
4740 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4741 if (file_data
== NULL
)
4744 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4747 /* Already visited. */
4752 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4754 const char *filename
= file_data
->file_names
[j
];
4755 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4760 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4762 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4765 this_real_name
= gdb_realpath (filename
);
4766 (*fun
) (filename
, this_real_name
.get (), data
);
4771 dw2_has_symbols (struct objfile
*objfile
)
4776 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4779 dw2_find_last_source_symtab
,
4780 dw2_forget_cached_source_info
,
4781 dw2_map_symtabs_matching_filename
,
4786 dw2_expand_symtabs_for_function
,
4787 dw2_expand_all_symtabs
,
4788 dw2_expand_symtabs_with_fullname
,
4789 dw2_map_matching_symbols
,
4790 dw2_expand_symtabs_matching
,
4791 dw2_find_pc_sect_compunit_symtab
,
4793 dw2_map_symbol_filenames
4796 /* DWARF-5 debug_names reader. */
4798 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4799 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4801 /* A helper function that reads the .debug_names section in SECTION
4802 and fills in MAP. FILENAME is the name of the file containing the
4803 section; it is used for error reporting.
4805 Returns true if all went well, false otherwise. */
4808 read_debug_names_from_section (struct objfile
*objfile
,
4809 const char *filename
,
4810 struct dwarf2_section_info
*section
,
4811 mapped_debug_names
&map
)
4813 if (section
->empty ())
4816 /* Older elfutils strip versions could keep the section in the main
4817 executable while splitting it for the separate debug info file. */
4818 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4821 section
->read (objfile
);
4823 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4825 const gdb_byte
*addr
= section
->buffer
;
4827 bfd
*const abfd
= section
->get_bfd_owner ();
4829 unsigned int bytes_read
;
4830 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4833 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4834 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4835 if (bytes_read
+ length
!= section
->size
)
4837 /* There may be multiple per-CU indices. */
4838 warning (_("Section .debug_names in %s length %s does not match "
4839 "section length %s, ignoring .debug_names."),
4840 filename
, plongest (bytes_read
+ length
),
4841 pulongest (section
->size
));
4845 /* The version number. */
4846 uint16_t version
= read_2_bytes (abfd
, addr
);
4850 warning (_("Section .debug_names in %s has unsupported version %d, "
4851 "ignoring .debug_names."),
4857 uint16_t padding
= read_2_bytes (abfd
, addr
);
4861 warning (_("Section .debug_names in %s has unsupported padding %d, "
4862 "ignoring .debug_names."),
4867 /* comp_unit_count - The number of CUs in the CU list. */
4868 map
.cu_count
= read_4_bytes (abfd
, addr
);
4871 /* local_type_unit_count - The number of TUs in the local TU
4873 map
.tu_count
= read_4_bytes (abfd
, addr
);
4876 /* foreign_type_unit_count - The number of TUs in the foreign TU
4878 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4880 if (foreign_tu_count
!= 0)
4882 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4883 "ignoring .debug_names."),
4884 filename
, static_cast<unsigned long> (foreign_tu_count
));
4888 /* bucket_count - The number of hash buckets in the hash lookup
4890 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4893 /* name_count - The number of unique names in the index. */
4894 map
.name_count
= read_4_bytes (abfd
, addr
);
4897 /* abbrev_table_size - The size in bytes of the abbreviations
4899 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4902 /* augmentation_string_size - The size in bytes of the augmentation
4903 string. This value is rounded up to a multiple of 4. */
4904 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4906 map
.augmentation_is_gdb
= ((augmentation_string_size
4907 == sizeof (dwarf5_augmentation
))
4908 && memcmp (addr
, dwarf5_augmentation
,
4909 sizeof (dwarf5_augmentation
)) == 0);
4910 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4911 addr
+= augmentation_string_size
;
4914 map
.cu_table_reordered
= addr
;
4915 addr
+= map
.cu_count
* map
.offset_size
;
4917 /* List of Local TUs */
4918 map
.tu_table_reordered
= addr
;
4919 addr
+= map
.tu_count
* map
.offset_size
;
4921 /* Hash Lookup Table */
4922 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4923 addr
+= map
.bucket_count
* 4;
4924 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4925 addr
+= map
.name_count
* 4;
4928 map
.name_table_string_offs_reordered
= addr
;
4929 addr
+= map
.name_count
* map
.offset_size
;
4930 map
.name_table_entry_offs_reordered
= addr
;
4931 addr
+= map
.name_count
* map
.offset_size
;
4933 const gdb_byte
*abbrev_table_start
= addr
;
4936 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4941 const auto insertpair
4942 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
4943 if (!insertpair
.second
)
4945 warning (_("Section .debug_names in %s has duplicate index %s, "
4946 "ignoring .debug_names."),
4947 filename
, pulongest (index_num
));
4950 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
4951 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4956 mapped_debug_names::index_val::attr attr
;
4957 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4959 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4961 if (attr
.form
== DW_FORM_implicit_const
)
4963 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
4967 if (attr
.dw_idx
== 0 && attr
.form
== 0)
4969 indexval
.attr_vec
.push_back (std::move (attr
));
4972 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
4974 warning (_("Section .debug_names in %s has abbreviation_table "
4975 "of size %s vs. written as %u, ignoring .debug_names."),
4976 filename
, plongest (addr
- abbrev_table_start
),
4980 map
.entry_pool
= addr
;
4985 /* A helper for create_cus_from_debug_names that handles the MAP's CU
4989 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4990 const mapped_debug_names
&map
,
4991 dwarf2_section_info
§ion
,
4994 sect_offset sect_off_prev
;
4995 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
4997 sect_offset sect_off_next
;
4998 if (i
< map
.cu_count
)
5001 = (sect_offset
) (extract_unsigned_integer
5002 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5004 map
.dwarf5_byte_order
));
5007 sect_off_next
= (sect_offset
) section
.size
;
5010 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5011 dwarf2_per_cu_data
*per_cu
5012 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5013 sect_off_prev
, length
);
5014 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5016 sect_off_prev
= sect_off_next
;
5020 /* Read the CU list from the mapped index, and use it to create all
5021 the CU objects for this dwarf2_per_objfile. */
5024 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5025 const mapped_debug_names
&map
,
5026 const mapped_debug_names
&dwz_map
)
5028 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5029 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5031 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5032 dwarf2_per_objfile
->info
,
5033 false /* is_dwz */);
5035 if (dwz_map
.cu_count
== 0)
5038 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5039 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5043 /* Read .debug_names. If everything went ok, initialize the "quick"
5044 elements of all the CUs and return true. Otherwise, return false. */
5047 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5049 std::unique_ptr
<mapped_debug_names
> map
5050 (new mapped_debug_names (dwarf2_per_objfile
));
5051 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5052 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5054 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5055 &dwarf2_per_objfile
->debug_names
,
5059 /* Don't use the index if it's empty. */
5060 if (map
->name_count
== 0)
5063 /* If there is a .dwz file, read it so we can get its CU list as
5065 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5068 if (!read_debug_names_from_section (objfile
,
5069 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5070 &dwz
->debug_names
, dwz_map
))
5072 warning (_("could not read '.debug_names' section from %s; skipping"),
5073 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5078 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5080 if (map
->tu_count
!= 0)
5082 /* We can only handle a single .debug_types when we have an
5084 if (dwarf2_per_objfile
->types
.size () != 1)
5087 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5089 create_signatured_type_table_from_debug_names
5090 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5093 create_addrmap_from_aranges (dwarf2_per_objfile
,
5094 &dwarf2_per_objfile
->debug_aranges
);
5096 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5097 dwarf2_per_objfile
->using_index
= 1;
5098 dwarf2_per_objfile
->quick_file_names_table
=
5099 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5104 /* Type used to manage iterating over all CUs looking for a symbol for
5107 class dw2_debug_names_iterator
5110 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5111 gdb::optional
<block_enum
> block_index
,
5114 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5115 m_addr (find_vec_in_debug_names (map
, name
))
5118 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5119 search_domain search
, uint32_t namei
)
5122 m_addr (find_vec_in_debug_names (map
, namei
))
5125 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5126 block_enum block_index
, domain_enum domain
,
5128 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5129 m_addr (find_vec_in_debug_names (map
, namei
))
5132 /* Return the next matching CU or NULL if there are no more. */
5133 dwarf2_per_cu_data
*next ();
5136 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5138 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5141 /* The internalized form of .debug_names. */
5142 const mapped_debug_names
&m_map
;
5144 /* If set, only look for symbols that match that block. Valid values are
5145 GLOBAL_BLOCK and STATIC_BLOCK. */
5146 const gdb::optional
<block_enum
> m_block_index
;
5148 /* The kind of symbol we're looking for. */
5149 const domain_enum m_domain
= UNDEF_DOMAIN
;
5150 const search_domain m_search
= ALL_DOMAIN
;
5152 /* The list of CUs from the index entry of the symbol, or NULL if
5154 const gdb_byte
*m_addr
;
5158 mapped_debug_names::namei_to_name (uint32_t namei
) const
5160 const ULONGEST namei_string_offs
5161 = extract_unsigned_integer ((name_table_string_offs_reordered
5162 + namei
* offset_size
),
5165 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5169 /* Find a slot in .debug_names for the object named NAME. If NAME is
5170 found, return pointer to its pool data. If NAME cannot be found,
5174 dw2_debug_names_iterator::find_vec_in_debug_names
5175 (const mapped_debug_names
&map
, const char *name
)
5177 int (*cmp
) (const char *, const char *);
5179 gdb::unique_xmalloc_ptr
<char> without_params
;
5180 if (current_language
->la_language
== language_cplus
5181 || current_language
->la_language
== language_fortran
5182 || current_language
->la_language
== language_d
)
5184 /* NAME is already canonical. Drop any qualifiers as
5185 .debug_names does not contain any. */
5187 if (strchr (name
, '(') != NULL
)
5189 without_params
= cp_remove_params (name
);
5190 if (without_params
!= NULL
)
5191 name
= without_params
.get ();
5195 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5197 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5199 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5200 (map
.bucket_table_reordered
5201 + (full_hash
% map
.bucket_count
)), 4,
5202 map
.dwarf5_byte_order
);
5206 if (namei
>= map
.name_count
)
5208 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5210 namei
, map
.name_count
,
5211 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5217 const uint32_t namei_full_hash
5218 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5219 (map
.hash_table_reordered
+ namei
), 4,
5220 map
.dwarf5_byte_order
);
5221 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5224 if (full_hash
== namei_full_hash
)
5226 const char *const namei_string
= map
.namei_to_name (namei
);
5228 #if 0 /* An expensive sanity check. */
5229 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5231 complaint (_("Wrong .debug_names hash for string at index %u "
5233 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5238 if (cmp (namei_string
, name
) == 0)
5240 const ULONGEST namei_entry_offs
5241 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5242 + namei
* map
.offset_size
),
5243 map
.offset_size
, map
.dwarf5_byte_order
);
5244 return map
.entry_pool
+ namei_entry_offs
;
5249 if (namei
>= map
.name_count
)
5255 dw2_debug_names_iterator::find_vec_in_debug_names
5256 (const mapped_debug_names
&map
, uint32_t namei
)
5258 if (namei
>= map
.name_count
)
5260 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5262 namei
, map
.name_count
,
5263 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5267 const ULONGEST namei_entry_offs
5268 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5269 + namei
* map
.offset_size
),
5270 map
.offset_size
, map
.dwarf5_byte_order
);
5271 return map
.entry_pool
+ namei_entry_offs
;
5274 /* See dw2_debug_names_iterator. */
5276 dwarf2_per_cu_data
*
5277 dw2_debug_names_iterator::next ()
5282 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5283 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5284 bfd
*const abfd
= objfile
->obfd
;
5288 unsigned int bytes_read
;
5289 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5290 m_addr
+= bytes_read
;
5294 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5295 if (indexval_it
== m_map
.abbrev_map
.cend ())
5297 complaint (_("Wrong .debug_names undefined abbrev code %s "
5299 pulongest (abbrev
), objfile_name (objfile
));
5302 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5303 enum class symbol_linkage
{
5307 } symbol_linkage_
= symbol_linkage::unknown
;
5308 dwarf2_per_cu_data
*per_cu
= NULL
;
5309 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5314 case DW_FORM_implicit_const
:
5315 ull
= attr
.implicit_const
;
5317 case DW_FORM_flag_present
:
5321 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5322 m_addr
+= bytes_read
;
5325 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5326 dwarf_form_name (attr
.form
),
5327 objfile_name (objfile
));
5330 switch (attr
.dw_idx
)
5332 case DW_IDX_compile_unit
:
5333 /* Don't crash on bad data. */
5334 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5336 complaint (_(".debug_names entry has bad CU index %s"
5339 objfile_name (dwarf2_per_objfile
->objfile
));
5342 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5344 case DW_IDX_type_unit
:
5345 /* Don't crash on bad data. */
5346 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5348 complaint (_(".debug_names entry has bad TU index %s"
5351 objfile_name (dwarf2_per_objfile
->objfile
));
5354 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5356 case DW_IDX_GNU_internal
:
5357 if (!m_map
.augmentation_is_gdb
)
5359 symbol_linkage_
= symbol_linkage::static_
;
5361 case DW_IDX_GNU_external
:
5362 if (!m_map
.augmentation_is_gdb
)
5364 symbol_linkage_
= symbol_linkage::extern_
;
5369 /* Skip if already read in. */
5370 if (per_cu
->v
.quick
->compunit_symtab
)
5373 /* Check static vs global. */
5374 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5376 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5377 const bool symbol_is_static
=
5378 symbol_linkage_
== symbol_linkage::static_
;
5379 if (want_static
!= symbol_is_static
)
5383 /* Match dw2_symtab_iter_next, symbol_kind
5384 and debug_names::psymbol_tag. */
5388 switch (indexval
.dwarf_tag
)
5390 case DW_TAG_variable
:
5391 case DW_TAG_subprogram
:
5392 /* Some types are also in VAR_DOMAIN. */
5393 case DW_TAG_typedef
:
5394 case DW_TAG_structure_type
:
5401 switch (indexval
.dwarf_tag
)
5403 case DW_TAG_typedef
:
5404 case DW_TAG_structure_type
:
5411 switch (indexval
.dwarf_tag
)
5414 case DW_TAG_variable
:
5421 switch (indexval
.dwarf_tag
)
5433 /* Match dw2_expand_symtabs_matching, symbol_kind and
5434 debug_names::psymbol_tag. */
5437 case VARIABLES_DOMAIN
:
5438 switch (indexval
.dwarf_tag
)
5440 case DW_TAG_variable
:
5446 case FUNCTIONS_DOMAIN
:
5447 switch (indexval
.dwarf_tag
)
5449 case DW_TAG_subprogram
:
5456 switch (indexval
.dwarf_tag
)
5458 case DW_TAG_typedef
:
5459 case DW_TAG_structure_type
:
5465 case MODULES_DOMAIN
:
5466 switch (indexval
.dwarf_tag
)
5480 static struct compunit_symtab
*
5481 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5482 const char *name
, domain_enum domain
)
5484 struct dwarf2_per_objfile
*dwarf2_per_objfile
5485 = get_dwarf2_per_objfile (objfile
);
5487 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5490 /* index is NULL if OBJF_READNOW. */
5493 const auto &map
= *mapp
;
5495 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5497 struct compunit_symtab
*stab_best
= NULL
;
5498 struct dwarf2_per_cu_data
*per_cu
;
5499 while ((per_cu
= iter
.next ()) != NULL
)
5501 struct symbol
*sym
, *with_opaque
= NULL
;
5502 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5503 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5504 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5506 sym
= block_find_symbol (block
, name
, domain
,
5507 block_find_non_opaque_type_preferred
,
5510 /* Some caution must be observed with overloaded functions and
5511 methods, since the index will not contain any overload
5512 information (but NAME might contain it). */
5515 && strcmp_iw (sym
->search_name (), name
) == 0)
5517 if (with_opaque
!= NULL
5518 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5521 /* Keep looking through other CUs. */
5527 /* This dumps minimal information about .debug_names. It is called
5528 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5529 uses this to verify that .debug_names has been loaded. */
5532 dw2_debug_names_dump (struct objfile
*objfile
)
5534 struct dwarf2_per_objfile
*dwarf2_per_objfile
5535 = get_dwarf2_per_objfile (objfile
);
5537 gdb_assert (dwarf2_per_objfile
->using_index
);
5538 printf_filtered (".debug_names:");
5539 if (dwarf2_per_objfile
->debug_names_table
)
5540 printf_filtered (" exists\n");
5542 printf_filtered (" faked for \"readnow\"\n");
5543 printf_filtered ("\n");
5547 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5548 const char *func_name
)
5550 struct dwarf2_per_objfile
*dwarf2_per_objfile
5551 = get_dwarf2_per_objfile (objfile
);
5553 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5554 if (dwarf2_per_objfile
->debug_names_table
)
5556 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5558 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5560 struct dwarf2_per_cu_data
*per_cu
;
5561 while ((per_cu
= iter
.next ()) != NULL
)
5562 dw2_instantiate_symtab (per_cu
, false);
5567 dw2_debug_names_map_matching_symbols
5568 (struct objfile
*objfile
,
5569 const lookup_name_info
&name
, domain_enum domain
,
5571 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5572 symbol_compare_ftype
*ordered_compare
)
5574 struct dwarf2_per_objfile
*dwarf2_per_objfile
5575 = get_dwarf2_per_objfile (objfile
);
5577 /* debug_names_table is NULL if OBJF_READNOW. */
5578 if (!dwarf2_per_objfile
->debug_names_table
)
5581 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5582 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5584 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5585 auto matcher
= [&] (const char *symname
)
5587 if (ordered_compare
== nullptr)
5589 return ordered_compare (symname
, match_name
) == 0;
5592 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5593 [&] (offset_type namei
)
5595 /* The name was matched, now expand corresponding CUs that were
5597 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5599 struct dwarf2_per_cu_data
*per_cu
;
5600 while ((per_cu
= iter
.next ()) != NULL
)
5601 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5605 /* It's a shame we couldn't do this inside the
5606 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5607 that have already been expanded. Instead, this loop matches what
5608 the psymtab code does. */
5609 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5611 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5612 if (cust
!= nullptr)
5614 const struct block
*block
5615 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5616 if (!iterate_over_symbols_terminated (block
, name
,
5624 dw2_debug_names_expand_symtabs_matching
5625 (struct objfile
*objfile
,
5626 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5627 const lookup_name_info
*lookup_name
,
5628 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5629 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5630 enum search_domain kind
)
5632 struct dwarf2_per_objfile
*dwarf2_per_objfile
5633 = get_dwarf2_per_objfile (objfile
);
5635 /* debug_names_table is NULL if OBJF_READNOW. */
5636 if (!dwarf2_per_objfile
->debug_names_table
)
5639 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5641 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5643 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5647 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5653 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5655 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5657 kind
, [&] (offset_type namei
)
5659 /* The name was matched, now expand corresponding CUs that were
5661 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5663 struct dwarf2_per_cu_data
*per_cu
;
5664 while ((per_cu
= iter
.next ()) != NULL
)
5665 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5671 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5674 dw2_find_last_source_symtab
,
5675 dw2_forget_cached_source_info
,
5676 dw2_map_symtabs_matching_filename
,
5677 dw2_debug_names_lookup_symbol
,
5680 dw2_debug_names_dump
,
5681 dw2_debug_names_expand_symtabs_for_function
,
5682 dw2_expand_all_symtabs
,
5683 dw2_expand_symtabs_with_fullname
,
5684 dw2_debug_names_map_matching_symbols
,
5685 dw2_debug_names_expand_symtabs_matching
,
5686 dw2_find_pc_sect_compunit_symtab
,
5688 dw2_map_symbol_filenames
5691 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5692 to either a dwarf2_per_objfile or dwz_file object. */
5694 template <typename T
>
5695 static gdb::array_view
<const gdb_byte
>
5696 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5698 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5700 if (section
->empty ())
5703 /* Older elfutils strip versions could keep the section in the main
5704 executable while splitting it for the separate debug info file. */
5705 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5708 section
->read (obj
);
5710 /* dwarf2_section_info::size is a bfd_size_type, while
5711 gdb::array_view works with size_t. On 32-bit hosts, with
5712 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5713 is 32-bit. So we need an explicit narrowing conversion here.
5714 This is fine, because it's impossible to allocate or mmap an
5715 array/buffer larger than what size_t can represent. */
5716 return gdb::make_array_view (section
->buffer
, section
->size
);
5719 /* Lookup the index cache for the contents of the index associated to
5722 static gdb::array_view
<const gdb_byte
>
5723 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5725 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5726 if (build_id
== nullptr)
5729 return global_index_cache
.lookup_gdb_index (build_id
,
5730 &dwarf2_obj
->index_cache_res
);
5733 /* Same as the above, but for DWZ. */
5735 static gdb::array_view
<const gdb_byte
>
5736 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5738 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5739 if (build_id
== nullptr)
5742 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5745 /* See symfile.h. */
5748 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5750 struct dwarf2_per_objfile
*dwarf2_per_objfile
5751 = get_dwarf2_per_objfile (objfile
);
5753 /* If we're about to read full symbols, don't bother with the
5754 indices. In this case we also don't care if some other debug
5755 format is making psymtabs, because they are all about to be
5757 if ((objfile
->flags
& OBJF_READNOW
))
5759 dwarf2_per_objfile
->using_index
= 1;
5760 create_all_comp_units (dwarf2_per_objfile
);
5761 create_all_type_units (dwarf2_per_objfile
);
5762 dwarf2_per_objfile
->quick_file_names_table
5763 = create_quick_file_names_table
5764 (dwarf2_per_objfile
->all_comp_units
.size ());
5766 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5767 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5769 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5771 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5772 struct dwarf2_per_cu_quick_data
);
5775 /* Return 1 so that gdb sees the "quick" functions. However,
5776 these functions will be no-ops because we will have expanded
5778 *index_kind
= dw_index_kind::GDB_INDEX
;
5782 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5784 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5788 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5789 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5790 get_gdb_index_contents_from_section
<dwz_file
>))
5792 *index_kind
= dw_index_kind::GDB_INDEX
;
5796 /* ... otherwise, try to find the index in the index cache. */
5797 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5798 get_gdb_index_contents_from_cache
,
5799 get_gdb_index_contents_from_cache_dwz
))
5801 global_index_cache
.hit ();
5802 *index_kind
= dw_index_kind::GDB_INDEX
;
5806 global_index_cache
.miss ();
5812 /* Build a partial symbol table. */
5815 dwarf2_build_psymtabs (struct objfile
*objfile
)
5817 struct dwarf2_per_objfile
*dwarf2_per_objfile
5818 = get_dwarf2_per_objfile (objfile
);
5820 init_psymbol_list (objfile
, 1024);
5824 /* This isn't really ideal: all the data we allocate on the
5825 objfile's obstack is still uselessly kept around. However,
5826 freeing it seems unsafe. */
5827 psymtab_discarder
psymtabs (objfile
);
5828 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5831 /* (maybe) store an index in the cache. */
5832 global_index_cache
.store (dwarf2_per_objfile
);
5834 catch (const gdb_exception_error
&except
)
5836 exception_print (gdb_stderr
, except
);
5840 /* Find the base address of the compilation unit for range lists and
5841 location lists. It will normally be specified by DW_AT_low_pc.
5842 In DWARF-3 draft 4, the base address could be overridden by
5843 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5844 compilation units with discontinuous ranges. */
5847 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5849 struct attribute
*attr
;
5851 cu
->base_address
.reset ();
5853 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5854 if (attr
!= nullptr)
5855 cu
->base_address
= attr
->value_as_address ();
5858 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5859 if (attr
!= nullptr)
5860 cu
->base_address
= attr
->value_as_address ();
5864 /* Helper function that returns the proper abbrev section for
5867 static struct dwarf2_section_info
*
5868 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5870 struct dwarf2_section_info
*abbrev
;
5871 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5873 if (this_cu
->is_dwz
)
5874 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5876 abbrev
= &dwarf2_per_objfile
->abbrev
;
5881 /* Fetch the abbreviation table offset from a comp or type unit header. */
5884 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5885 struct dwarf2_section_info
*section
,
5886 sect_offset sect_off
)
5888 bfd
*abfd
= section
->get_bfd_owner ();
5889 const gdb_byte
*info_ptr
;
5890 unsigned int initial_length_size
, offset_size
;
5893 section
->read (dwarf2_per_objfile
->objfile
);
5894 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5895 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5896 offset_size
= initial_length_size
== 4 ? 4 : 8;
5897 info_ptr
+= initial_length_size
;
5899 version
= read_2_bytes (abfd
, info_ptr
);
5903 /* Skip unit type and address size. */
5907 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
5910 /* A partial symtab that is used only for include files. */
5911 struct dwarf2_include_psymtab
: public partial_symtab
5913 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
5914 : partial_symtab (filename
, objfile
)
5918 void read_symtab (struct objfile
*objfile
) override
5920 /* It's an include file, no symbols to read for it.
5921 Everything is in the includer symtab. */
5923 /* The expansion of a dwarf2_include_psymtab is just a trigger for
5924 expansion of the includer psymtab. We use the dependencies[0] field to
5925 model the includer. But if we go the regular route of calling
5926 expand_psymtab here, and having expand_psymtab call expand_dependencies
5927 to expand the includer, we'll only use expand_psymtab on the includer
5928 (making it a non-toplevel psymtab), while if we expand the includer via
5929 another path, we'll use read_symtab (making it a toplevel psymtab).
5930 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
5931 psymtab, and trigger read_symtab on the includer here directly. */
5932 includer ()->read_symtab (objfile
);
5935 void expand_psymtab (struct objfile
*objfile
) override
5937 /* This is not called by read_symtab, and should not be called by any
5938 expand_dependencies. */
5942 bool readin_p () const override
5944 return includer ()->readin_p ();
5947 struct compunit_symtab
*get_compunit_symtab () const override
5953 partial_symtab
*includer () const
5955 /* An include psymtab has exactly one dependency: the psymtab that
5957 gdb_assert (this->number_of_dependencies
== 1);
5958 return this->dependencies
[0];
5962 /* Allocate a new partial symtab for file named NAME and mark this new
5963 partial symtab as being an include of PST. */
5966 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
5967 struct objfile
*objfile
)
5969 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
5971 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
5973 /* It shares objfile->objfile_obstack. */
5974 subpst
->dirname
= pst
->dirname
;
5977 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
5978 subpst
->dependencies
[0] = pst
;
5979 subpst
->number_of_dependencies
= 1;
5982 /* Read the Line Number Program data and extract the list of files
5983 included by the source file represented by PST. Build an include
5984 partial symtab for each of these included files. */
5987 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
5988 struct die_info
*die
,
5989 dwarf2_psymtab
*pst
)
5992 struct attribute
*attr
;
5994 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5995 if (attr
!= nullptr)
5996 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
5998 return; /* No linetable, so no includes. */
6000 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6001 that we pass in the raw text_low here; that is ok because we're
6002 only decoding the line table to make include partial symtabs, and
6003 so the addresses aren't really used. */
6004 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6005 pst
->raw_text_low (), 1);
6009 hash_signatured_type (const void *item
)
6011 const struct signatured_type
*sig_type
6012 = (const struct signatured_type
*) item
;
6014 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6015 return sig_type
->signature
;
6019 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6021 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6022 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6024 return lhs
->signature
== rhs
->signature
;
6027 /* Allocate a hash table for signatured types. */
6030 allocate_signatured_type_table ()
6032 return htab_up (htab_create_alloc (41,
6033 hash_signatured_type
,
6035 NULL
, xcalloc
, xfree
));
6038 /* A helper function to add a signatured type CU to a table. */
6041 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6043 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6044 std::vector
<signatured_type
*> *all_type_units
6045 = (std::vector
<signatured_type
*> *) datum
;
6047 all_type_units
->push_back (sigt
);
6052 /* A helper for create_debug_types_hash_table. Read types from SECTION
6053 and fill them into TYPES_HTAB. It will process only type units,
6054 therefore DW_UT_type. */
6057 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6058 struct dwo_file
*dwo_file
,
6059 dwarf2_section_info
*section
, htab_up
&types_htab
,
6060 rcuh_kind section_kind
)
6062 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6063 struct dwarf2_section_info
*abbrev_section
;
6065 const gdb_byte
*info_ptr
, *end_ptr
;
6067 abbrev_section
= (dwo_file
!= NULL
6068 ? &dwo_file
->sections
.abbrev
6069 : &dwarf2_per_objfile
->abbrev
);
6071 if (dwarf_read_debug
)
6072 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6073 section
->get_name (),
6074 abbrev_section
->get_file_name ());
6076 section
->read (objfile
);
6077 info_ptr
= section
->buffer
;
6079 if (info_ptr
== NULL
)
6082 /* We can't set abfd until now because the section may be empty or
6083 not present, in which case the bfd is unknown. */
6084 abfd
= section
->get_bfd_owner ();
6086 /* We don't use cutu_reader here because we don't need to read
6087 any dies: the signature is in the header. */
6089 end_ptr
= info_ptr
+ section
->size
;
6090 while (info_ptr
< end_ptr
)
6092 struct signatured_type
*sig_type
;
6093 struct dwo_unit
*dwo_tu
;
6095 const gdb_byte
*ptr
= info_ptr
;
6096 struct comp_unit_head header
;
6097 unsigned int length
;
6099 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6101 /* Initialize it due to a false compiler warning. */
6102 header
.signature
= -1;
6103 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6105 /* We need to read the type's signature in order to build the hash
6106 table, but we don't need anything else just yet. */
6108 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6109 abbrev_section
, ptr
, section_kind
);
6111 length
= header
.get_length ();
6113 /* Skip dummy type units. */
6114 if (ptr
>= info_ptr
+ length
6115 || peek_abbrev_code (abfd
, ptr
) == 0
6116 || header
.unit_type
!= DW_UT_type
)
6122 if (types_htab
== NULL
)
6125 types_htab
= allocate_dwo_unit_table ();
6127 types_htab
= allocate_signatured_type_table ();
6133 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6135 dwo_tu
->dwo_file
= dwo_file
;
6136 dwo_tu
->signature
= header
.signature
;
6137 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6138 dwo_tu
->section
= section
;
6139 dwo_tu
->sect_off
= sect_off
;
6140 dwo_tu
->length
= length
;
6144 /* N.B.: type_offset is not usable if this type uses a DWO file.
6145 The real type_offset is in the DWO file. */
6147 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6148 struct signatured_type
);
6149 sig_type
->signature
= header
.signature
;
6150 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6151 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6152 sig_type
->per_cu
.is_debug_types
= 1;
6153 sig_type
->per_cu
.section
= section
;
6154 sig_type
->per_cu
.sect_off
= sect_off
;
6155 sig_type
->per_cu
.length
= length
;
6158 slot
= htab_find_slot (types_htab
.get (),
6159 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6161 gdb_assert (slot
!= NULL
);
6164 sect_offset dup_sect_off
;
6168 const struct dwo_unit
*dup_tu
6169 = (const struct dwo_unit
*) *slot
;
6171 dup_sect_off
= dup_tu
->sect_off
;
6175 const struct signatured_type
*dup_tu
6176 = (const struct signatured_type
*) *slot
;
6178 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6181 complaint (_("debug type entry at offset %s is duplicate to"
6182 " the entry at offset %s, signature %s"),
6183 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6184 hex_string (header
.signature
));
6186 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6188 if (dwarf_read_debug
> 1)
6189 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6190 sect_offset_str (sect_off
),
6191 hex_string (header
.signature
));
6197 /* Create the hash table of all entries in the .debug_types
6198 (or .debug_types.dwo) section(s).
6199 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6200 otherwise it is NULL.
6202 The result is a pointer to the hash table or NULL if there are no types.
6204 Note: This function processes DWO files only, not DWP files. */
6207 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6208 struct dwo_file
*dwo_file
,
6209 gdb::array_view
<dwarf2_section_info
> type_sections
,
6210 htab_up
&types_htab
)
6212 for (dwarf2_section_info
§ion
: type_sections
)
6213 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6214 types_htab
, rcuh_kind::TYPE
);
6217 /* Create the hash table of all entries in the .debug_types section,
6218 and initialize all_type_units.
6219 The result is zero if there is an error (e.g. missing .debug_types section),
6220 otherwise non-zero. */
6223 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6227 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6228 &dwarf2_per_objfile
->info
, types_htab
,
6229 rcuh_kind::COMPILE
);
6230 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6231 dwarf2_per_objfile
->types
, types_htab
);
6232 if (types_htab
== NULL
)
6234 dwarf2_per_objfile
->signatured_types
= NULL
;
6238 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6240 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6241 dwarf2_per_objfile
->all_type_units
.reserve
6242 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6244 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6245 add_signatured_type_cu_to_table
,
6246 &dwarf2_per_objfile
->all_type_units
);
6251 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6252 If SLOT is non-NULL, it is the entry to use in the hash table.
6253 Otherwise we find one. */
6255 static struct signatured_type
*
6256 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6259 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6261 if (dwarf2_per_objfile
->all_type_units
.size ()
6262 == dwarf2_per_objfile
->all_type_units
.capacity ())
6263 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6265 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6266 struct signatured_type
);
6268 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6269 sig_type
->signature
= sig
;
6270 sig_type
->per_cu
.is_debug_types
= 1;
6271 if (dwarf2_per_objfile
->using_index
)
6273 sig_type
->per_cu
.v
.quick
=
6274 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6275 struct dwarf2_per_cu_quick_data
);
6280 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6283 gdb_assert (*slot
== NULL
);
6285 /* The rest of sig_type must be filled in by the caller. */
6289 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6290 Fill in SIG_ENTRY with DWO_ENTRY. */
6293 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6294 struct signatured_type
*sig_entry
,
6295 struct dwo_unit
*dwo_entry
)
6297 /* Make sure we're not clobbering something we don't expect to. */
6298 gdb_assert (! sig_entry
->per_cu
.queued
);
6299 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6300 if (dwarf2_per_objfile
->using_index
)
6302 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6303 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6306 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6307 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6308 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6309 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6310 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6312 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6313 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6314 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6315 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6316 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6317 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6318 sig_entry
->dwo_unit
= dwo_entry
;
6321 /* Subroutine of lookup_signatured_type.
6322 If we haven't read the TU yet, create the signatured_type data structure
6323 for a TU to be read in directly from a DWO file, bypassing the stub.
6324 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6325 using .gdb_index, then when reading a CU we want to stay in the DWO file
6326 containing that CU. Otherwise we could end up reading several other DWO
6327 files (due to comdat folding) to process the transitive closure of all the
6328 mentioned TUs, and that can be slow. The current DWO file will have every
6329 type signature that it needs.
6330 We only do this for .gdb_index because in the psymtab case we already have
6331 to read all the DWOs to build the type unit groups. */
6333 static struct signatured_type
*
6334 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6336 struct dwarf2_per_objfile
*dwarf2_per_objfile
6337 = cu
->per_cu
->dwarf2_per_objfile
;
6338 struct dwo_file
*dwo_file
;
6339 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6340 struct signatured_type find_sig_entry
, *sig_entry
;
6343 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6345 /* If TU skeletons have been removed then we may not have read in any
6347 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6348 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6350 /* We only ever need to read in one copy of a signatured type.
6351 Use the global signatured_types array to do our own comdat-folding
6352 of types. If this is the first time we're reading this TU, and
6353 the TU has an entry in .gdb_index, replace the recorded data from
6354 .gdb_index with this TU. */
6356 find_sig_entry
.signature
= sig
;
6357 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6358 &find_sig_entry
, INSERT
);
6359 sig_entry
= (struct signatured_type
*) *slot
;
6361 /* We can get here with the TU already read, *or* in the process of being
6362 read. Don't reassign the global entry to point to this DWO if that's
6363 the case. Also note that if the TU is already being read, it may not
6364 have come from a DWO, the program may be a mix of Fission-compiled
6365 code and non-Fission-compiled code. */
6367 /* Have we already tried to read this TU?
6368 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6369 needn't exist in the global table yet). */
6370 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6373 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6374 dwo_unit of the TU itself. */
6375 dwo_file
= cu
->dwo_unit
->dwo_file
;
6377 /* Ok, this is the first time we're reading this TU. */
6378 if (dwo_file
->tus
== NULL
)
6380 find_dwo_entry
.signature
= sig
;
6381 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6383 if (dwo_entry
== NULL
)
6386 /* If the global table doesn't have an entry for this TU, add one. */
6387 if (sig_entry
== NULL
)
6388 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6390 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6391 sig_entry
->per_cu
.tu_read
= 1;
6395 /* Subroutine of lookup_signatured_type.
6396 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6397 then try the DWP file. If the TU stub (skeleton) has been removed then
6398 it won't be in .gdb_index. */
6400 static struct signatured_type
*
6401 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6403 struct dwarf2_per_objfile
*dwarf2_per_objfile
6404 = cu
->per_cu
->dwarf2_per_objfile
;
6405 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6406 struct dwo_unit
*dwo_entry
;
6407 struct signatured_type find_sig_entry
, *sig_entry
;
6410 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6411 gdb_assert (dwp_file
!= NULL
);
6413 /* If TU skeletons have been removed then we may not have read in any
6415 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6416 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6418 find_sig_entry
.signature
= sig
;
6419 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6420 &find_sig_entry
, INSERT
);
6421 sig_entry
= (struct signatured_type
*) *slot
;
6423 /* Have we already tried to read this TU?
6424 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6425 needn't exist in the global table yet). */
6426 if (sig_entry
!= NULL
)
6429 if (dwp_file
->tus
== NULL
)
6431 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6432 sig
, 1 /* is_debug_types */);
6433 if (dwo_entry
== NULL
)
6436 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6437 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6442 /* Lookup a signature based type for DW_FORM_ref_sig8.
6443 Returns NULL if signature SIG is not present in the table.
6444 It is up to the caller to complain about this. */
6446 static struct signatured_type
*
6447 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6449 struct dwarf2_per_objfile
*dwarf2_per_objfile
6450 = cu
->per_cu
->dwarf2_per_objfile
;
6453 && dwarf2_per_objfile
->using_index
)
6455 /* We're in a DWO/DWP file, and we're using .gdb_index.
6456 These cases require special processing. */
6457 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6458 return lookup_dwo_signatured_type (cu
, sig
);
6460 return lookup_dwp_signatured_type (cu
, sig
);
6464 struct signatured_type find_entry
, *entry
;
6466 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6468 find_entry
.signature
= sig
;
6469 entry
= ((struct signatured_type
*)
6470 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6476 /* Low level DIE reading support. */
6478 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6481 init_cu_die_reader (struct die_reader_specs
*reader
,
6482 struct dwarf2_cu
*cu
,
6483 struct dwarf2_section_info
*section
,
6484 struct dwo_file
*dwo_file
,
6485 struct abbrev_table
*abbrev_table
)
6487 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6488 reader
->abfd
= section
->get_bfd_owner ();
6490 reader
->dwo_file
= dwo_file
;
6491 reader
->die_section
= section
;
6492 reader
->buffer
= section
->buffer
;
6493 reader
->buffer_end
= section
->buffer
+ section
->size
;
6494 reader
->abbrev_table
= abbrev_table
;
6497 /* Subroutine of cutu_reader to simplify it.
6498 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6499 There's just a lot of work to do, and cutu_reader is big enough
6502 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6503 from it to the DIE in the DWO. If NULL we are skipping the stub.
6504 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6505 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6506 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6507 STUB_COMP_DIR may be non-NULL.
6508 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6509 are filled in with the info of the DIE from the DWO file.
6510 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6511 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6512 kept around for at least as long as *RESULT_READER.
6514 The result is non-zero if a valid (non-dummy) DIE was found. */
6517 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6518 struct dwo_unit
*dwo_unit
,
6519 struct die_info
*stub_comp_unit_die
,
6520 const char *stub_comp_dir
,
6521 struct die_reader_specs
*result_reader
,
6522 const gdb_byte
**result_info_ptr
,
6523 struct die_info
**result_comp_unit_die
,
6524 abbrev_table_up
*result_dwo_abbrev_table
)
6526 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6527 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6528 struct dwarf2_cu
*cu
= this_cu
->cu
;
6530 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6531 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6532 int i
,num_extra_attrs
;
6533 struct dwarf2_section_info
*dwo_abbrev_section
;
6534 struct die_info
*comp_unit_die
;
6536 /* At most one of these may be provided. */
6537 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6539 /* These attributes aren't processed until later:
6540 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6541 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6542 referenced later. However, these attributes are found in the stub
6543 which we won't have later. In order to not impose this complication
6544 on the rest of the code, we read them here and copy them to the
6553 if (stub_comp_unit_die
!= NULL
)
6555 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6557 if (! this_cu
->is_debug_types
)
6558 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6559 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6560 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6561 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6562 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6564 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6566 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6567 here (if needed). We need the value before we can process
6569 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6571 else if (stub_comp_dir
!= NULL
)
6573 /* Reconstruct the comp_dir attribute to simplify the code below. */
6574 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6575 comp_dir
->name
= DW_AT_comp_dir
;
6576 comp_dir
->form
= DW_FORM_string
;
6577 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6578 DW_STRING (comp_dir
) = stub_comp_dir
;
6581 /* Set up for reading the DWO CU/TU. */
6582 cu
->dwo_unit
= dwo_unit
;
6583 dwarf2_section_info
*section
= dwo_unit
->section
;
6584 section
->read (objfile
);
6585 abfd
= section
->get_bfd_owner ();
6586 begin_info_ptr
= info_ptr
= (section
->buffer
6587 + to_underlying (dwo_unit
->sect_off
));
6588 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6590 if (this_cu
->is_debug_types
)
6592 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6594 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6595 &cu
->header
, section
,
6597 info_ptr
, rcuh_kind::TYPE
);
6598 /* This is not an assert because it can be caused by bad debug info. */
6599 if (sig_type
->signature
!= cu
->header
.signature
)
6601 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6602 " TU at offset %s [in module %s]"),
6603 hex_string (sig_type
->signature
),
6604 hex_string (cu
->header
.signature
),
6605 sect_offset_str (dwo_unit
->sect_off
),
6606 bfd_get_filename (abfd
));
6608 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6609 /* For DWOs coming from DWP files, we don't know the CU length
6610 nor the type's offset in the TU until now. */
6611 dwo_unit
->length
= cu
->header
.get_length ();
6612 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6614 /* Establish the type offset that can be used to lookup the type.
6615 For DWO files, we don't know it until now. */
6616 sig_type
->type_offset_in_section
6617 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6621 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6622 &cu
->header
, section
,
6624 info_ptr
, rcuh_kind::COMPILE
);
6625 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6626 /* For DWOs coming from DWP files, we don't know the CU length
6628 dwo_unit
->length
= cu
->header
.get_length ();
6631 *result_dwo_abbrev_table
6632 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6633 cu
->header
.abbrev_sect_off
);
6634 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6635 result_dwo_abbrev_table
->get ());
6637 /* Read in the die, but leave space to copy over the attributes
6638 from the stub. This has the benefit of simplifying the rest of
6639 the code - all the work to maintain the illusion of a single
6640 DW_TAG_{compile,type}_unit DIE is done here. */
6641 num_extra_attrs
= ((stmt_list
!= NULL
)
6645 + (comp_dir
!= NULL
));
6646 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6649 /* Copy over the attributes from the stub to the DIE we just read in. */
6650 comp_unit_die
= *result_comp_unit_die
;
6651 i
= comp_unit_die
->num_attrs
;
6652 if (stmt_list
!= NULL
)
6653 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6655 comp_unit_die
->attrs
[i
++] = *low_pc
;
6656 if (high_pc
!= NULL
)
6657 comp_unit_die
->attrs
[i
++] = *high_pc
;
6659 comp_unit_die
->attrs
[i
++] = *ranges
;
6660 if (comp_dir
!= NULL
)
6661 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6662 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6664 if (dwarf_die_debug
)
6666 fprintf_unfiltered (gdb_stdlog
,
6667 "Read die from %s@0x%x of %s:\n",
6668 section
->get_name (),
6669 (unsigned) (begin_info_ptr
- section
->buffer
),
6670 bfd_get_filename (abfd
));
6671 dump_die (comp_unit_die
, dwarf_die_debug
);
6674 /* Skip dummy compilation units. */
6675 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6676 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6679 *result_info_ptr
= info_ptr
;
6683 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6684 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6685 signature is part of the header. */
6686 static gdb::optional
<ULONGEST
>
6687 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6689 if (cu
->header
.version
>= 5)
6690 return cu
->header
.signature
;
6691 struct attribute
*attr
;
6692 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6693 if (attr
== nullptr)
6694 return gdb::optional
<ULONGEST
> ();
6695 return DW_UNSND (attr
);
6698 /* Subroutine of cutu_reader to simplify it.
6699 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6700 Returns NULL if the specified DWO unit cannot be found. */
6702 static struct dwo_unit
*
6703 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6704 struct die_info
*comp_unit_die
,
6705 const char *dwo_name
)
6707 struct dwarf2_cu
*cu
= this_cu
->cu
;
6708 struct dwo_unit
*dwo_unit
;
6709 const char *comp_dir
;
6711 gdb_assert (cu
!= NULL
);
6713 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6714 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6715 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6717 if (this_cu
->is_debug_types
)
6719 struct signatured_type
*sig_type
;
6721 /* Since this_cu is the first member of struct signatured_type,
6722 we can go from a pointer to one to a pointer to the other. */
6723 sig_type
= (struct signatured_type
*) this_cu
;
6724 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6728 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6729 if (!signature
.has_value ())
6730 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6732 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6733 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6740 /* Subroutine of cutu_reader to simplify it.
6741 See it for a description of the parameters.
6742 Read a TU directly from a DWO file, bypassing the stub. */
6745 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6746 int use_existing_cu
)
6748 struct signatured_type
*sig_type
;
6750 /* Verify we can do the following downcast, and that we have the
6752 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6753 sig_type
= (struct signatured_type
*) this_cu
;
6754 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6756 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6758 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6759 /* There's no need to do the rereading_dwo_cu handling that
6760 cutu_reader does since we don't read the stub. */
6764 /* If !use_existing_cu, this_cu->cu must be NULL. */
6765 gdb_assert (this_cu
->cu
== NULL
);
6766 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6769 /* A future optimization, if needed, would be to use an existing
6770 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6771 could share abbrev tables. */
6773 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6774 NULL
/* stub_comp_unit_die */,
6775 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6778 &m_dwo_abbrev_table
) == 0)
6785 /* Initialize a CU (or TU) and read its DIEs.
6786 If the CU defers to a DWO file, read the DWO file as well.
6788 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6789 Otherwise the table specified in the comp unit header is read in and used.
6790 This is an optimization for when we already have the abbrev table.
6792 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6793 Otherwise, a new CU is allocated with xmalloc. */
6795 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6796 struct abbrev_table
*abbrev_table
,
6797 int use_existing_cu
,
6799 : die_reader_specs
{},
6802 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6803 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6804 struct dwarf2_section_info
*section
= this_cu
->section
;
6805 bfd
*abfd
= section
->get_bfd_owner ();
6806 struct dwarf2_cu
*cu
;
6807 const gdb_byte
*begin_info_ptr
;
6808 struct signatured_type
*sig_type
= NULL
;
6809 struct dwarf2_section_info
*abbrev_section
;
6810 /* Non-zero if CU currently points to a DWO file and we need to
6811 reread it. When this happens we need to reread the skeleton die
6812 before we can reread the DWO file (this only applies to CUs, not TUs). */
6813 int rereading_dwo_cu
= 0;
6815 if (dwarf_die_debug
)
6816 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6817 this_cu
->is_debug_types
? "type" : "comp",
6818 sect_offset_str (this_cu
->sect_off
));
6820 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6821 file (instead of going through the stub), short-circuit all of this. */
6822 if (this_cu
->reading_dwo_directly
)
6824 /* Narrow down the scope of possibilities to have to understand. */
6825 gdb_assert (this_cu
->is_debug_types
);
6826 gdb_assert (abbrev_table
== NULL
);
6827 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6831 /* This is cheap if the section is already read in. */
6832 section
->read (objfile
);
6834 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6836 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6838 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6841 /* If this CU is from a DWO file we need to start over, we need to
6842 refetch the attributes from the skeleton CU.
6843 This could be optimized by retrieving those attributes from when we
6844 were here the first time: the previous comp_unit_die was stored in
6845 comp_unit_obstack. But there's no data yet that we need this
6847 if (cu
->dwo_unit
!= NULL
)
6848 rereading_dwo_cu
= 1;
6852 /* If !use_existing_cu, this_cu->cu must be NULL. */
6853 gdb_assert (this_cu
->cu
== NULL
);
6854 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6855 cu
= m_new_cu
.get ();
6858 /* Get the header. */
6859 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6861 /* We already have the header, there's no need to read it in again. */
6862 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6866 if (this_cu
->is_debug_types
)
6868 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6869 &cu
->header
, section
,
6870 abbrev_section
, info_ptr
,
6873 /* Since per_cu is the first member of struct signatured_type,
6874 we can go from a pointer to one to a pointer to the other. */
6875 sig_type
= (struct signatured_type
*) this_cu
;
6876 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6877 gdb_assert (sig_type
->type_offset_in_tu
6878 == cu
->header
.type_cu_offset_in_tu
);
6879 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6881 /* LENGTH has not been set yet for type units if we're
6882 using .gdb_index. */
6883 this_cu
->length
= cu
->header
.get_length ();
6885 /* Establish the type offset that can be used to lookup the type. */
6886 sig_type
->type_offset_in_section
=
6887 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6889 this_cu
->dwarf_version
= cu
->header
.version
;
6893 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6894 &cu
->header
, section
,
6897 rcuh_kind::COMPILE
);
6899 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6900 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
6901 this_cu
->dwarf_version
= cu
->header
.version
;
6905 /* Skip dummy compilation units. */
6906 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6907 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6913 /* If we don't have them yet, read the abbrevs for this compilation unit.
6914 And if we need to read them now, make sure they're freed when we're
6916 if (abbrev_table
!= NULL
)
6917 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6920 m_abbrev_table_holder
6921 = abbrev_table::read (objfile
, abbrev_section
,
6922 cu
->header
.abbrev_sect_off
);
6923 abbrev_table
= m_abbrev_table_holder
.get ();
6926 /* Read the top level CU/TU die. */
6927 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
6928 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
6930 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
6936 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6937 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
6938 table from the DWO file and pass the ownership over to us. It will be
6939 referenced from READER, so we must make sure to free it after we're done
6942 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6943 DWO CU, that this test will fail (the attribute will not be present). */
6944 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6945 if (dwo_name
!= nullptr)
6947 struct dwo_unit
*dwo_unit
;
6948 struct die_info
*dwo_comp_unit_die
;
6950 if (comp_unit_die
->has_children
)
6952 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
6953 " has children (offset %s) [in module %s]"),
6954 sect_offset_str (this_cu
->sect_off
),
6955 bfd_get_filename (abfd
));
6957 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
6958 if (dwo_unit
!= NULL
)
6960 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6961 comp_unit_die
, NULL
,
6964 &m_dwo_abbrev_table
) == 0)
6970 comp_unit_die
= dwo_comp_unit_die
;
6974 /* Yikes, we couldn't find the rest of the DIE, we only have
6975 the stub. A complaint has already been logged. There's
6976 not much more we can do except pass on the stub DIE to
6977 die_reader_func. We don't want to throw an error on bad
6984 cutu_reader::keep ()
6986 /* Done, clean up. */
6987 gdb_assert (!dummy_p
);
6988 if (m_new_cu
!= NULL
)
6990 struct dwarf2_per_objfile
*dwarf2_per_objfile
6991 = m_this_cu
->dwarf2_per_objfile
;
6992 /* Link this CU into read_in_chain. */
6993 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6994 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
6995 /* The chain owns it now. */
6996 m_new_cu
.release ();
7000 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7001 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7002 assumed to have already done the lookup to find the DWO file).
7004 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7005 THIS_CU->is_debug_types, but nothing else.
7007 We fill in THIS_CU->length.
7009 THIS_CU->cu is always freed when done.
7010 This is done in order to not leave THIS_CU->cu in a state where we have
7011 to care whether it refers to the "main" CU or the DWO CU.
7013 When parent_cu is passed, it is used to provide a default value for
7014 str_offsets_base and addr_base from the parent. */
7016 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7017 struct dwarf2_cu
*parent_cu
,
7018 struct dwo_file
*dwo_file
)
7019 : die_reader_specs
{},
7022 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7023 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7024 struct dwarf2_section_info
*section
= this_cu
->section
;
7025 bfd
*abfd
= section
->get_bfd_owner ();
7026 struct dwarf2_section_info
*abbrev_section
;
7027 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7029 if (dwarf_die_debug
)
7030 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7031 this_cu
->is_debug_types
? "type" : "comp",
7032 sect_offset_str (this_cu
->sect_off
));
7034 gdb_assert (this_cu
->cu
== NULL
);
7036 abbrev_section
= (dwo_file
!= NULL
7037 ? &dwo_file
->sections
.abbrev
7038 : get_abbrev_section_for_cu (this_cu
));
7040 /* This is cheap if the section is already read in. */
7041 section
->read (objfile
);
7043 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7045 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7046 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7047 &m_new_cu
->header
, section
,
7048 abbrev_section
, info_ptr
,
7049 (this_cu
->is_debug_types
7051 : rcuh_kind::COMPILE
));
7053 if (parent_cu
!= nullptr)
7055 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7056 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7058 this_cu
->length
= m_new_cu
->header
.get_length ();
7060 /* Skip dummy compilation units. */
7061 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7062 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7068 m_abbrev_table_holder
7069 = abbrev_table::read (objfile
, abbrev_section
,
7070 m_new_cu
->header
.abbrev_sect_off
);
7072 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7073 m_abbrev_table_holder
.get ());
7074 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7078 /* Type Unit Groups.
7080 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7081 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7082 so that all types coming from the same compilation (.o file) are grouped
7083 together. A future step could be to put the types in the same symtab as
7084 the CU the types ultimately came from. */
7087 hash_type_unit_group (const void *item
)
7089 const struct type_unit_group
*tu_group
7090 = (const struct type_unit_group
*) item
;
7092 return hash_stmt_list_entry (&tu_group
->hash
);
7096 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7098 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7099 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7101 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7104 /* Allocate a hash table for type unit groups. */
7107 allocate_type_unit_groups_table ()
7109 return htab_up (htab_create_alloc (3,
7110 hash_type_unit_group
,
7112 NULL
, xcalloc
, xfree
));
7115 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7116 partial symtabs. We combine several TUs per psymtab to not let the size
7117 of any one psymtab grow too big. */
7118 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7119 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7121 /* Helper routine for get_type_unit_group.
7122 Create the type_unit_group object used to hold one or more TUs. */
7124 static struct type_unit_group
*
7125 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7127 struct dwarf2_per_objfile
*dwarf2_per_objfile
7128 = cu
->per_cu
->dwarf2_per_objfile
;
7129 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7130 struct dwarf2_per_cu_data
*per_cu
;
7131 struct type_unit_group
*tu_group
;
7133 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7134 struct type_unit_group
);
7135 per_cu
= &tu_group
->per_cu
;
7136 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7138 if (dwarf2_per_objfile
->using_index
)
7140 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7141 struct dwarf2_per_cu_quick_data
);
7145 unsigned int line_offset
= to_underlying (line_offset_struct
);
7146 dwarf2_psymtab
*pst
;
7149 /* Give the symtab a useful name for debug purposes. */
7150 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7151 name
= string_printf ("<type_units_%d>",
7152 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7154 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7156 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7157 pst
->anonymous
= true;
7160 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7161 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7166 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7167 STMT_LIST is a DW_AT_stmt_list attribute. */
7169 static struct type_unit_group
*
7170 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7172 struct dwarf2_per_objfile
*dwarf2_per_objfile
7173 = cu
->per_cu
->dwarf2_per_objfile
;
7174 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7175 struct type_unit_group
*tu_group
;
7177 unsigned int line_offset
;
7178 struct type_unit_group type_unit_group_for_lookup
;
7180 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7181 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7183 /* Do we need to create a new group, or can we use an existing one? */
7187 line_offset
= DW_UNSND (stmt_list
);
7188 ++tu_stats
->nr_symtab_sharers
;
7192 /* Ugh, no stmt_list. Rare, but we have to handle it.
7193 We can do various things here like create one group per TU or
7194 spread them over multiple groups to split up the expansion work.
7195 To avoid worst case scenarios (too many groups or too large groups)
7196 we, umm, group them in bunches. */
7197 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7198 | (tu_stats
->nr_stmt_less_type_units
7199 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7200 ++tu_stats
->nr_stmt_less_type_units
;
7203 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7204 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7205 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7206 &type_unit_group_for_lookup
, INSERT
);
7209 tu_group
= (struct type_unit_group
*) *slot
;
7210 gdb_assert (tu_group
!= NULL
);
7214 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7215 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7217 ++tu_stats
->nr_symtabs
;
7223 /* Partial symbol tables. */
7225 /* Create a psymtab named NAME and assign it to PER_CU.
7227 The caller must fill in the following details:
7228 dirname, textlow, texthigh. */
7230 static dwarf2_psymtab
*
7231 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7233 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7234 dwarf2_psymtab
*pst
;
7236 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7238 pst
->psymtabs_addrmap_supported
= true;
7240 /* This is the glue that links PST into GDB's symbol API. */
7241 per_cu
->v
.psymtab
= pst
;
7246 /* DIE reader function for process_psymtab_comp_unit. */
7249 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7250 const gdb_byte
*info_ptr
,
7251 struct die_info
*comp_unit_die
,
7252 enum language pretend_language
)
7254 struct dwarf2_cu
*cu
= reader
->cu
;
7255 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7256 struct gdbarch
*gdbarch
= objfile
->arch ();
7257 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7259 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7260 dwarf2_psymtab
*pst
;
7261 enum pc_bounds_kind cu_bounds_kind
;
7262 const char *filename
;
7264 gdb_assert (! per_cu
->is_debug_types
);
7266 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7268 /* Allocate a new partial symbol table structure. */
7269 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7270 static const char artificial
[] = "<artificial>";
7271 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7272 if (filename
== NULL
)
7274 else if (strcmp (filename
, artificial
) == 0)
7276 debug_filename
.reset (concat (artificial
, "@",
7277 sect_offset_str (per_cu
->sect_off
),
7279 filename
= debug_filename
.get ();
7282 pst
= create_partial_symtab (per_cu
, filename
);
7284 /* This must be done before calling dwarf2_build_include_psymtabs. */
7285 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7287 baseaddr
= objfile
->text_section_offset ();
7289 dwarf2_find_base_address (comp_unit_die
, cu
);
7291 /* Possibly set the default values of LOWPC and HIGHPC from
7293 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7294 &best_highpc
, cu
, pst
);
7295 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7298 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7301 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7303 /* Store the contiguous range if it is not empty; it can be
7304 empty for CUs with no code. */
7305 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7309 /* Check if comp unit has_children.
7310 If so, read the rest of the partial symbols from this comp unit.
7311 If not, there's no more debug_info for this comp unit. */
7312 if (comp_unit_die
->has_children
)
7314 struct partial_die_info
*first_die
;
7315 CORE_ADDR lowpc
, highpc
;
7317 lowpc
= ((CORE_ADDR
) -1);
7318 highpc
= ((CORE_ADDR
) 0);
7320 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7322 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7323 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7325 /* If we didn't find a lowpc, set it to highpc to avoid
7326 complaints from `maint check'. */
7327 if (lowpc
== ((CORE_ADDR
) -1))
7330 /* If the compilation unit didn't have an explicit address range,
7331 then use the information extracted from its child dies. */
7332 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7335 best_highpc
= highpc
;
7338 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7339 best_lowpc
+ baseaddr
)
7341 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7342 best_highpc
+ baseaddr
)
7345 end_psymtab_common (objfile
, pst
);
7347 if (!cu
->per_cu
->imported_symtabs_empty ())
7350 int len
= cu
->per_cu
->imported_symtabs_size ();
7352 /* Fill in 'dependencies' here; we fill in 'users' in a
7354 pst
->number_of_dependencies
= len
;
7356 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7357 for (i
= 0; i
< len
; ++i
)
7359 pst
->dependencies
[i
]
7360 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7363 cu
->per_cu
->imported_symtabs_free ();
7366 /* Get the list of files included in the current compilation unit,
7367 and build a psymtab for each of them. */
7368 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7370 if (dwarf_read_debug
)
7371 fprintf_unfiltered (gdb_stdlog
,
7372 "Psymtab for %s unit @%s: %s - %s"
7373 ", %d global, %d static syms\n",
7374 per_cu
->is_debug_types
? "type" : "comp",
7375 sect_offset_str (per_cu
->sect_off
),
7376 paddress (gdbarch
, pst
->text_low (objfile
)),
7377 paddress (gdbarch
, pst
->text_high (objfile
)),
7378 pst
->n_global_syms
, pst
->n_static_syms
);
7381 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7382 Process compilation unit THIS_CU for a psymtab. */
7385 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7386 bool want_partial_unit
,
7387 enum language pretend_language
)
7389 /* If this compilation unit was already read in, free the
7390 cached copy in order to read it in again. This is
7391 necessary because we skipped some symbols when we first
7392 read in the compilation unit (see load_partial_dies).
7393 This problem could be avoided, but the benefit is unclear. */
7394 if (this_cu
->cu
!= NULL
)
7395 free_one_cached_comp_unit (this_cu
);
7397 cutu_reader
reader (this_cu
, NULL
, 0, false);
7399 switch (reader
.comp_unit_die
->tag
)
7401 case DW_TAG_compile_unit
:
7402 this_cu
->unit_type
= DW_UT_compile
;
7404 case DW_TAG_partial_unit
:
7405 this_cu
->unit_type
= DW_UT_partial
;
7415 else if (this_cu
->is_debug_types
)
7416 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7417 reader
.comp_unit_die
);
7418 else if (want_partial_unit
7419 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7420 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7421 reader
.comp_unit_die
,
7424 this_cu
->lang
= this_cu
->cu
->language
;
7426 /* Age out any secondary CUs. */
7427 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7430 /* Reader function for build_type_psymtabs. */
7433 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7434 const gdb_byte
*info_ptr
,
7435 struct die_info
*type_unit_die
)
7437 struct dwarf2_per_objfile
*dwarf2_per_objfile
7438 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7439 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7440 struct dwarf2_cu
*cu
= reader
->cu
;
7441 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7442 struct signatured_type
*sig_type
;
7443 struct type_unit_group
*tu_group
;
7444 struct attribute
*attr
;
7445 struct partial_die_info
*first_die
;
7446 CORE_ADDR lowpc
, highpc
;
7447 dwarf2_psymtab
*pst
;
7449 gdb_assert (per_cu
->is_debug_types
);
7450 sig_type
= (struct signatured_type
*) per_cu
;
7452 if (! type_unit_die
->has_children
)
7455 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7456 tu_group
= get_type_unit_group (cu
, attr
);
7458 if (tu_group
->tus
== nullptr)
7459 tu_group
->tus
= new std::vector
<signatured_type
*>;
7460 tu_group
->tus
->push_back (sig_type
);
7462 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7463 pst
= create_partial_symtab (per_cu
, "");
7464 pst
->anonymous
= true;
7466 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7468 lowpc
= (CORE_ADDR
) -1;
7469 highpc
= (CORE_ADDR
) 0;
7470 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7472 end_psymtab_common (objfile
, pst
);
7475 /* Struct used to sort TUs by their abbreviation table offset. */
7477 struct tu_abbrev_offset
7479 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7480 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7483 signatured_type
*sig_type
;
7484 sect_offset abbrev_offset
;
7487 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7490 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7491 const struct tu_abbrev_offset
&b
)
7493 return a
.abbrev_offset
< b
.abbrev_offset
;
7496 /* Efficiently read all the type units.
7497 This does the bulk of the work for build_type_psymtabs.
7499 The efficiency is because we sort TUs by the abbrev table they use and
7500 only read each abbrev table once. In one program there are 200K TUs
7501 sharing 8K abbrev tables.
7503 The main purpose of this function is to support building the
7504 dwarf2_per_objfile->type_unit_groups table.
7505 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7506 can collapse the search space by grouping them by stmt_list.
7507 The savings can be significant, in the same program from above the 200K TUs
7508 share 8K stmt_list tables.
7510 FUNC is expected to call get_type_unit_group, which will create the
7511 struct type_unit_group if necessary and add it to
7512 dwarf2_per_objfile->type_unit_groups. */
7515 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7517 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7518 abbrev_table_up abbrev_table
;
7519 sect_offset abbrev_offset
;
7521 /* It's up to the caller to not call us multiple times. */
7522 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7524 if (dwarf2_per_objfile
->all_type_units
.empty ())
7527 /* TUs typically share abbrev tables, and there can be way more TUs than
7528 abbrev tables. Sort by abbrev table to reduce the number of times we
7529 read each abbrev table in.
7530 Alternatives are to punt or to maintain a cache of abbrev tables.
7531 This is simpler and efficient enough for now.
7533 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7534 symtab to use). Typically TUs with the same abbrev offset have the same
7535 stmt_list value too so in practice this should work well.
7537 The basic algorithm here is:
7539 sort TUs by abbrev table
7540 for each TU with same abbrev table:
7541 read abbrev table if first user
7542 read TU top level DIE
7543 [IWBN if DWO skeletons had DW_AT_stmt_list]
7546 if (dwarf_read_debug
)
7547 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7549 /* Sort in a separate table to maintain the order of all_type_units
7550 for .gdb_index: TU indices directly index all_type_units. */
7551 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7552 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7554 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7555 sorted_by_abbrev
.emplace_back
7556 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7557 sig_type
->per_cu
.section
,
7558 sig_type
->per_cu
.sect_off
));
7560 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7561 sort_tu_by_abbrev_offset
);
7563 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7565 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7567 /* Switch to the next abbrev table if necessary. */
7568 if (abbrev_table
== NULL
7569 || tu
.abbrev_offset
!= abbrev_offset
)
7571 abbrev_offset
= tu
.abbrev_offset
;
7573 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7574 &dwarf2_per_objfile
->abbrev
,
7576 ++tu_stats
->nr_uniq_abbrev_tables
;
7579 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7581 if (!reader
.dummy_p
)
7582 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7583 reader
.comp_unit_die
);
7587 /* Print collected type unit statistics. */
7590 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7592 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7594 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7595 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7596 dwarf2_per_objfile
->all_type_units
.size ());
7597 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7598 tu_stats
->nr_uniq_abbrev_tables
);
7599 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7600 tu_stats
->nr_symtabs
);
7601 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7602 tu_stats
->nr_symtab_sharers
);
7603 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7604 tu_stats
->nr_stmt_less_type_units
);
7605 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7606 tu_stats
->nr_all_type_units_reallocs
);
7609 /* Traversal function for build_type_psymtabs. */
7612 build_type_psymtab_dependencies (void **slot
, void *info
)
7614 struct dwarf2_per_objfile
*dwarf2_per_objfile
7615 = (struct dwarf2_per_objfile
*) info
;
7616 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7617 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7618 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7619 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7620 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7623 gdb_assert (len
> 0);
7624 gdb_assert (per_cu
->type_unit_group_p ());
7626 pst
->number_of_dependencies
= len
;
7627 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7628 for (i
= 0; i
< len
; ++i
)
7630 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7631 gdb_assert (iter
->per_cu
.is_debug_types
);
7632 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7633 iter
->type_unit_group
= tu_group
;
7636 delete tu_group
->tus
;
7637 tu_group
->tus
= nullptr;
7642 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7643 Build partial symbol tables for the .debug_types comp-units. */
7646 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7648 if (! create_all_type_units (dwarf2_per_objfile
))
7651 build_type_psymtabs_1 (dwarf2_per_objfile
);
7654 /* Traversal function for process_skeletonless_type_unit.
7655 Read a TU in a DWO file and build partial symbols for it. */
7658 process_skeletonless_type_unit (void **slot
, void *info
)
7660 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7661 struct dwarf2_per_objfile
*dwarf2_per_objfile
7662 = (struct dwarf2_per_objfile
*) info
;
7663 struct signatured_type find_entry
, *entry
;
7665 /* If this TU doesn't exist in the global table, add it and read it in. */
7667 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7668 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7670 find_entry
.signature
= dwo_unit
->signature
;
7671 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7672 &find_entry
, INSERT
);
7673 /* If we've already seen this type there's nothing to do. What's happening
7674 is we're doing our own version of comdat-folding here. */
7678 /* This does the job that create_all_type_units would have done for
7680 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7681 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7684 /* This does the job that build_type_psymtabs_1 would have done. */
7685 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7686 if (!reader
.dummy_p
)
7687 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7688 reader
.comp_unit_die
);
7693 /* Traversal function for process_skeletonless_type_units. */
7696 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7698 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7700 if (dwo_file
->tus
!= NULL
)
7701 htab_traverse_noresize (dwo_file
->tus
.get (),
7702 process_skeletonless_type_unit
, info
);
7707 /* Scan all TUs of DWO files, verifying we've processed them.
7708 This is needed in case a TU was emitted without its skeleton.
7709 Note: This can't be done until we know what all the DWO files are. */
7712 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7714 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7715 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7716 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7718 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7719 process_dwo_file_for_skeletonless_type_units
,
7720 dwarf2_per_objfile
);
7724 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7727 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7729 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7731 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7736 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7738 /* Set the 'user' field only if it is not already set. */
7739 if (pst
->dependencies
[j
]->user
== NULL
)
7740 pst
->dependencies
[j
]->user
= pst
;
7745 /* Build the partial symbol table by doing a quick pass through the
7746 .debug_info and .debug_abbrev sections. */
7749 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7751 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7753 if (dwarf_read_debug
)
7755 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7756 objfile_name (objfile
));
7759 scoped_restore restore_reading_psyms
7760 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7763 dwarf2_per_objfile
->info
.read (objfile
);
7765 /* Any cached compilation units will be linked by the per-objfile
7766 read_in_chain. Make sure to free them when we're done. */
7767 free_cached_comp_units
freer (dwarf2_per_objfile
);
7769 build_type_psymtabs (dwarf2_per_objfile
);
7771 create_all_comp_units (dwarf2_per_objfile
);
7773 /* Create a temporary address map on a temporary obstack. We later
7774 copy this to the final obstack. */
7775 auto_obstack temp_obstack
;
7777 scoped_restore save_psymtabs_addrmap
7778 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7779 addrmap_create_mutable (&temp_obstack
));
7781 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7783 if (per_cu
->v
.psymtab
!= NULL
)
7784 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7786 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7789 /* This has to wait until we read the CUs, we need the list of DWOs. */
7790 process_skeletonless_type_units (dwarf2_per_objfile
);
7792 /* Now that all TUs have been processed we can fill in the dependencies. */
7793 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7795 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7796 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7799 if (dwarf_read_debug
)
7800 print_tu_stats (dwarf2_per_objfile
);
7802 set_partial_user (dwarf2_per_objfile
);
7804 objfile
->partial_symtabs
->psymtabs_addrmap
7805 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7806 objfile
->partial_symtabs
->obstack ());
7807 /* At this point we want to keep the address map. */
7808 save_psymtabs_addrmap
.release ();
7810 if (dwarf_read_debug
)
7811 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7812 objfile_name (objfile
));
7815 /* Load the partial DIEs for a secondary CU into memory.
7816 This is also used when rereading a primary CU with load_all_dies. */
7819 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7821 cutu_reader
reader (this_cu
, NULL
, 1, false);
7823 if (!reader
.dummy_p
)
7825 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7828 /* Check if comp unit has_children.
7829 If so, read the rest of the partial symbols from this comp unit.
7830 If not, there's no more debug_info for this comp unit. */
7831 if (reader
.comp_unit_die
->has_children
)
7832 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7839 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7840 struct dwarf2_section_info
*section
,
7841 struct dwarf2_section_info
*abbrev_section
,
7842 unsigned int is_dwz
)
7844 const gdb_byte
*info_ptr
;
7845 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7847 if (dwarf_read_debug
)
7848 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7849 section
->get_name (),
7850 section
->get_file_name ());
7852 section
->read (objfile
);
7854 info_ptr
= section
->buffer
;
7856 while (info_ptr
< section
->buffer
+ section
->size
)
7858 struct dwarf2_per_cu_data
*this_cu
;
7860 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7862 comp_unit_head cu_header
;
7863 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7864 abbrev_section
, info_ptr
,
7865 rcuh_kind::COMPILE
);
7867 /* Save the compilation unit for later lookup. */
7868 if (cu_header
.unit_type
!= DW_UT_type
)
7870 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7871 struct dwarf2_per_cu_data
);
7872 memset (this_cu
, 0, sizeof (*this_cu
));
7876 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7877 struct signatured_type
);
7878 memset (sig_type
, 0, sizeof (*sig_type
));
7879 sig_type
->signature
= cu_header
.signature
;
7880 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7881 this_cu
= &sig_type
->per_cu
;
7883 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7884 this_cu
->sect_off
= sect_off
;
7885 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7886 this_cu
->is_dwz
= is_dwz
;
7887 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7888 this_cu
->section
= section
;
7890 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
7892 info_ptr
= info_ptr
+ this_cu
->length
;
7896 /* Create a list of all compilation units in OBJFILE.
7897 This is only done for -readnow and building partial symtabs. */
7900 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7902 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
7903 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
7904 &dwarf2_per_objfile
->abbrev
, 0);
7906 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
7908 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
7912 /* Process all loaded DIEs for compilation unit CU, starting at
7913 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7914 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7915 DW_AT_ranges). See the comments of add_partial_subprogram on how
7916 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7919 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7920 CORE_ADDR
*highpc
, int set_addrmap
,
7921 struct dwarf2_cu
*cu
)
7923 struct partial_die_info
*pdi
;
7925 /* Now, march along the PDI's, descending into ones which have
7926 interesting children but skipping the children of the other ones,
7927 until we reach the end of the compilation unit. */
7935 /* Anonymous namespaces or modules have no name but have interesting
7936 children, so we need to look at them. Ditto for anonymous
7939 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7940 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7941 || pdi
->tag
== DW_TAG_imported_unit
7942 || pdi
->tag
== DW_TAG_inlined_subroutine
)
7946 case DW_TAG_subprogram
:
7947 case DW_TAG_inlined_subroutine
:
7948 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7950 case DW_TAG_constant
:
7951 case DW_TAG_variable
:
7952 case DW_TAG_typedef
:
7953 case DW_TAG_union_type
:
7954 if (!pdi
->is_declaration
7955 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
7957 add_partial_symbol (pdi
, cu
);
7960 case DW_TAG_class_type
:
7961 case DW_TAG_interface_type
:
7962 case DW_TAG_structure_type
:
7963 if (!pdi
->is_declaration
)
7965 add_partial_symbol (pdi
, cu
);
7967 if ((cu
->language
== language_rust
7968 || cu
->language
== language_cplus
) && pdi
->has_children
)
7969 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
7972 case DW_TAG_enumeration_type
:
7973 if (!pdi
->is_declaration
)
7974 add_partial_enumeration (pdi
, cu
);
7976 case DW_TAG_base_type
:
7977 case DW_TAG_subrange_type
:
7978 /* File scope base type definitions are added to the partial
7980 add_partial_symbol (pdi
, cu
);
7982 case DW_TAG_namespace
:
7983 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7986 if (!pdi
->is_declaration
)
7987 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7989 case DW_TAG_imported_unit
:
7991 struct dwarf2_per_cu_data
*per_cu
;
7993 /* For now we don't handle imported units in type units. */
7994 if (cu
->per_cu
->is_debug_types
)
7996 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7997 " supported in type units [in module %s]"),
7998 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8001 per_cu
= dwarf2_find_containing_comp_unit
8002 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8003 cu
->per_cu
->dwarf2_per_objfile
);
8005 /* Go read the partial unit, if needed. */
8006 if (per_cu
->v
.psymtab
== NULL
)
8007 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8009 cu
->per_cu
->imported_symtabs_push (per_cu
);
8012 case DW_TAG_imported_declaration
:
8013 add_partial_symbol (pdi
, cu
);
8020 /* If the die has a sibling, skip to the sibling. */
8022 pdi
= pdi
->die_sibling
;
8026 /* Functions used to compute the fully scoped name of a partial DIE.
8028 Normally, this is simple. For C++, the parent DIE's fully scoped
8029 name is concatenated with "::" and the partial DIE's name.
8030 Enumerators are an exception; they use the scope of their parent
8031 enumeration type, i.e. the name of the enumeration type is not
8032 prepended to the enumerator.
8034 There are two complexities. One is DW_AT_specification; in this
8035 case "parent" means the parent of the target of the specification,
8036 instead of the direct parent of the DIE. The other is compilers
8037 which do not emit DW_TAG_namespace; in this case we try to guess
8038 the fully qualified name of structure types from their members'
8039 linkage names. This must be done using the DIE's children rather
8040 than the children of any DW_AT_specification target. We only need
8041 to do this for structures at the top level, i.e. if the target of
8042 any DW_AT_specification (if any; otherwise the DIE itself) does not
8045 /* Compute the scope prefix associated with PDI's parent, in
8046 compilation unit CU. The result will be allocated on CU's
8047 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8048 field. NULL is returned if no prefix is necessary. */
8050 partial_die_parent_scope (struct partial_die_info
*pdi
,
8051 struct dwarf2_cu
*cu
)
8053 const char *grandparent_scope
;
8054 struct partial_die_info
*parent
, *real_pdi
;
8056 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8057 then this means the parent of the specification DIE. */
8060 while (real_pdi
->has_specification
)
8062 auto res
= find_partial_die (real_pdi
->spec_offset
,
8063 real_pdi
->spec_is_dwz
, cu
);
8068 parent
= real_pdi
->die_parent
;
8072 if (parent
->scope_set
)
8073 return parent
->scope
;
8077 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8079 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8080 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8081 Work around this problem here. */
8082 if (cu
->language
== language_cplus
8083 && parent
->tag
== DW_TAG_namespace
8084 && strcmp (parent
->name
, "::") == 0
8085 && grandparent_scope
== NULL
)
8087 parent
->scope
= NULL
;
8088 parent
->scope_set
= 1;
8092 /* Nested subroutines in Fortran get a prefix. */
8093 if (pdi
->tag
== DW_TAG_enumerator
)
8094 /* Enumerators should not get the name of the enumeration as a prefix. */
8095 parent
->scope
= grandparent_scope
;
8096 else if (parent
->tag
== DW_TAG_namespace
8097 || parent
->tag
== DW_TAG_module
8098 || parent
->tag
== DW_TAG_structure_type
8099 || parent
->tag
== DW_TAG_class_type
8100 || parent
->tag
== DW_TAG_interface_type
8101 || parent
->tag
== DW_TAG_union_type
8102 || parent
->tag
== DW_TAG_enumeration_type
8103 || (cu
->language
== language_fortran
8104 && parent
->tag
== DW_TAG_subprogram
8105 && pdi
->tag
== DW_TAG_subprogram
))
8107 if (grandparent_scope
== NULL
)
8108 parent
->scope
= parent
->name
;
8110 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8112 parent
->name
, 0, cu
);
8116 /* FIXME drow/2004-04-01: What should we be doing with
8117 function-local names? For partial symbols, we should probably be
8119 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8120 dwarf_tag_name (parent
->tag
),
8121 sect_offset_str (pdi
->sect_off
));
8122 parent
->scope
= grandparent_scope
;
8125 parent
->scope_set
= 1;
8126 return parent
->scope
;
8129 /* Return the fully scoped name associated with PDI, from compilation unit
8130 CU. The result will be allocated with malloc. */
8132 static gdb::unique_xmalloc_ptr
<char>
8133 partial_die_full_name (struct partial_die_info
*pdi
,
8134 struct dwarf2_cu
*cu
)
8136 const char *parent_scope
;
8138 /* If this is a template instantiation, we can not work out the
8139 template arguments from partial DIEs. So, unfortunately, we have
8140 to go through the full DIEs. At least any work we do building
8141 types here will be reused if full symbols are loaded later. */
8142 if (pdi
->has_template_arguments
)
8146 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8148 struct die_info
*die
;
8149 struct attribute attr
;
8150 struct dwarf2_cu
*ref_cu
= cu
;
8152 /* DW_FORM_ref_addr is using section offset. */
8153 attr
.name
= (enum dwarf_attribute
) 0;
8154 attr
.form
= DW_FORM_ref_addr
;
8155 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8156 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8158 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8162 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8163 if (parent_scope
== NULL
)
8166 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8171 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8173 struct dwarf2_per_objfile
*dwarf2_per_objfile
8174 = cu
->per_cu
->dwarf2_per_objfile
;
8175 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8176 struct gdbarch
*gdbarch
= objfile
->arch ();
8178 const char *actual_name
= NULL
;
8181 baseaddr
= objfile
->text_section_offset ();
8183 gdb::unique_xmalloc_ptr
<char> built_actual_name
8184 = partial_die_full_name (pdi
, cu
);
8185 if (built_actual_name
!= NULL
)
8186 actual_name
= built_actual_name
.get ();
8188 if (actual_name
== NULL
)
8189 actual_name
= pdi
->name
;
8193 case DW_TAG_inlined_subroutine
:
8194 case DW_TAG_subprogram
:
8195 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8197 if (pdi
->is_external
8198 || cu
->language
== language_ada
8199 || (cu
->language
== language_fortran
8200 && pdi
->die_parent
!= NULL
8201 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8203 /* Normally, only "external" DIEs are part of the global scope.
8204 But in Ada and Fortran, we want to be able to access nested
8205 procedures globally. So all Ada and Fortran subprograms are
8206 stored in the global scope. */
8207 add_psymbol_to_list (actual_name
,
8208 built_actual_name
!= NULL
,
8209 VAR_DOMAIN
, LOC_BLOCK
,
8210 SECT_OFF_TEXT (objfile
),
8211 psymbol_placement::GLOBAL
,
8213 cu
->language
, objfile
);
8217 add_psymbol_to_list (actual_name
,
8218 built_actual_name
!= NULL
,
8219 VAR_DOMAIN
, LOC_BLOCK
,
8220 SECT_OFF_TEXT (objfile
),
8221 psymbol_placement::STATIC
,
8222 addr
, cu
->language
, objfile
);
8225 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8226 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8228 case DW_TAG_constant
:
8229 add_psymbol_to_list (actual_name
,
8230 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8231 -1, (pdi
->is_external
8232 ? psymbol_placement::GLOBAL
8233 : psymbol_placement::STATIC
),
8234 0, cu
->language
, objfile
);
8236 case DW_TAG_variable
:
8238 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8242 && !dwarf2_per_objfile
->has_section_at_zero
)
8244 /* A global or static variable may also have been stripped
8245 out by the linker if unused, in which case its address
8246 will be nullified; do not add such variables into partial
8247 symbol table then. */
8249 else if (pdi
->is_external
)
8252 Don't enter into the minimal symbol tables as there is
8253 a minimal symbol table entry from the ELF symbols already.
8254 Enter into partial symbol table if it has a location
8255 descriptor or a type.
8256 If the location descriptor is missing, new_symbol will create
8257 a LOC_UNRESOLVED symbol, the address of the variable will then
8258 be determined from the minimal symbol table whenever the variable
8260 The address for the partial symbol table entry is not
8261 used by GDB, but it comes in handy for debugging partial symbol
8264 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8265 add_psymbol_to_list (actual_name
,
8266 built_actual_name
!= NULL
,
8267 VAR_DOMAIN
, LOC_STATIC
,
8268 SECT_OFF_TEXT (objfile
),
8269 psymbol_placement::GLOBAL
,
8270 addr
, cu
->language
, objfile
);
8274 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8276 /* Static Variable. Skip symbols whose value we cannot know (those
8277 without location descriptors or constant values). */
8278 if (!has_loc
&& !pdi
->has_const_value
)
8281 add_psymbol_to_list (actual_name
,
8282 built_actual_name
!= NULL
,
8283 VAR_DOMAIN
, LOC_STATIC
,
8284 SECT_OFF_TEXT (objfile
),
8285 psymbol_placement::STATIC
,
8287 cu
->language
, objfile
);
8290 case DW_TAG_typedef
:
8291 case DW_TAG_base_type
:
8292 case DW_TAG_subrange_type
:
8293 add_psymbol_to_list (actual_name
,
8294 built_actual_name
!= NULL
,
8295 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8296 psymbol_placement::STATIC
,
8297 0, cu
->language
, objfile
);
8299 case DW_TAG_imported_declaration
:
8300 case DW_TAG_namespace
:
8301 add_psymbol_to_list (actual_name
,
8302 built_actual_name
!= NULL
,
8303 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8304 psymbol_placement::GLOBAL
,
8305 0, cu
->language
, objfile
);
8308 /* With Fortran 77 there might be a "BLOCK DATA" module
8309 available without any name. If so, we skip the module as it
8310 doesn't bring any value. */
8311 if (actual_name
!= nullptr)
8312 add_psymbol_to_list (actual_name
,
8313 built_actual_name
!= NULL
,
8314 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8315 psymbol_placement::GLOBAL
,
8316 0, cu
->language
, objfile
);
8318 case DW_TAG_class_type
:
8319 case DW_TAG_interface_type
:
8320 case DW_TAG_structure_type
:
8321 case DW_TAG_union_type
:
8322 case DW_TAG_enumeration_type
:
8323 /* Skip external references. The DWARF standard says in the section
8324 about "Structure, Union, and Class Type Entries": "An incomplete
8325 structure, union or class type is represented by a structure,
8326 union or class entry that does not have a byte size attribute
8327 and that has a DW_AT_declaration attribute." */
8328 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8331 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8332 static vs. global. */
8333 add_psymbol_to_list (actual_name
,
8334 built_actual_name
!= NULL
,
8335 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
8336 cu
->language
== language_cplus
8337 ? psymbol_placement::GLOBAL
8338 : psymbol_placement::STATIC
,
8339 0, cu
->language
, objfile
);
8342 case DW_TAG_enumerator
:
8343 add_psymbol_to_list (actual_name
,
8344 built_actual_name
!= NULL
,
8345 VAR_DOMAIN
, LOC_CONST
, -1,
8346 cu
->language
== language_cplus
8347 ? psymbol_placement::GLOBAL
8348 : psymbol_placement::STATIC
,
8349 0, cu
->language
, objfile
);
8356 /* Read a partial die corresponding to a namespace; also, add a symbol
8357 corresponding to that namespace to the symbol table. NAMESPACE is
8358 the name of the enclosing namespace. */
8361 add_partial_namespace (struct partial_die_info
*pdi
,
8362 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8363 int set_addrmap
, struct dwarf2_cu
*cu
)
8365 /* Add a symbol for the namespace. */
8367 add_partial_symbol (pdi
, cu
);
8369 /* Now scan partial symbols in that namespace. */
8371 if (pdi
->has_children
)
8372 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8375 /* Read a partial die corresponding to a Fortran module. */
8378 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8379 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8381 /* Add a symbol for the namespace. */
8383 add_partial_symbol (pdi
, cu
);
8385 /* Now scan partial symbols in that module. */
8387 if (pdi
->has_children
)
8388 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8391 /* Read a partial die corresponding to a subprogram or an inlined
8392 subprogram and create a partial symbol for that subprogram.
8393 When the CU language allows it, this routine also defines a partial
8394 symbol for each nested subprogram that this subprogram contains.
8395 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8396 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8398 PDI may also be a lexical block, in which case we simply search
8399 recursively for subprograms defined inside that lexical block.
8400 Again, this is only performed when the CU language allows this
8401 type of definitions. */
8404 add_partial_subprogram (struct partial_die_info
*pdi
,
8405 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8406 int set_addrmap
, struct dwarf2_cu
*cu
)
8408 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8410 if (pdi
->has_pc_info
)
8412 if (pdi
->lowpc
< *lowpc
)
8413 *lowpc
= pdi
->lowpc
;
8414 if (pdi
->highpc
> *highpc
)
8415 *highpc
= pdi
->highpc
;
8418 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8419 struct gdbarch
*gdbarch
= objfile
->arch ();
8421 CORE_ADDR this_highpc
;
8422 CORE_ADDR this_lowpc
;
8424 baseaddr
= objfile
->text_section_offset ();
8426 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8427 pdi
->lowpc
+ baseaddr
)
8430 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8431 pdi
->highpc
+ baseaddr
)
8433 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8434 this_lowpc
, this_highpc
- 1,
8435 cu
->per_cu
->v
.psymtab
);
8439 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8441 if (!pdi
->is_declaration
)
8442 /* Ignore subprogram DIEs that do not have a name, they are
8443 illegal. Do not emit a complaint at this point, we will
8444 do so when we convert this psymtab into a symtab. */
8446 add_partial_symbol (pdi
, cu
);
8450 if (! pdi
->has_children
)
8453 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8455 pdi
= pdi
->die_child
;
8459 if (pdi
->tag
== DW_TAG_subprogram
8460 || pdi
->tag
== DW_TAG_inlined_subroutine
8461 || pdi
->tag
== DW_TAG_lexical_block
)
8462 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8463 pdi
= pdi
->die_sibling
;
8468 /* Read a partial die corresponding to an enumeration type. */
8471 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8472 struct dwarf2_cu
*cu
)
8474 struct partial_die_info
*pdi
;
8476 if (enum_pdi
->name
!= NULL
)
8477 add_partial_symbol (enum_pdi
, cu
);
8479 pdi
= enum_pdi
->die_child
;
8482 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8483 complaint (_("malformed enumerator DIE ignored"));
8485 add_partial_symbol (pdi
, cu
);
8486 pdi
= pdi
->die_sibling
;
8490 /* Return the initial uleb128 in the die at INFO_PTR. */
8493 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8495 unsigned int bytes_read
;
8497 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8500 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8501 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8503 Return the corresponding abbrev, or NULL if the number is zero (indicating
8504 an empty DIE). In either case *BYTES_READ will be set to the length of
8505 the initial number. */
8507 static struct abbrev_info
*
8508 peek_die_abbrev (const die_reader_specs
&reader
,
8509 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8511 dwarf2_cu
*cu
= reader
.cu
;
8512 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8513 unsigned int abbrev_number
8514 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8516 if (abbrev_number
== 0)
8519 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8522 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8523 " at offset %s [in module %s]"),
8524 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8525 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8531 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8532 Returns a pointer to the end of a series of DIEs, terminated by an empty
8533 DIE. Any children of the skipped DIEs will also be skipped. */
8535 static const gdb_byte
*
8536 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8540 unsigned int bytes_read
;
8541 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8544 return info_ptr
+ bytes_read
;
8546 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8550 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8551 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8552 abbrev corresponding to that skipped uleb128 should be passed in
8553 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8556 static const gdb_byte
*
8557 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8558 struct abbrev_info
*abbrev
)
8560 unsigned int bytes_read
;
8561 struct attribute attr
;
8562 bfd
*abfd
= reader
->abfd
;
8563 struct dwarf2_cu
*cu
= reader
->cu
;
8564 const gdb_byte
*buffer
= reader
->buffer
;
8565 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8566 unsigned int form
, i
;
8568 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8570 /* The only abbrev we care about is DW_AT_sibling. */
8571 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8574 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8576 if (attr
.form
== DW_FORM_ref_addr
)
8577 complaint (_("ignoring absolute DW_AT_sibling"));
8580 sect_offset off
= attr
.get_ref_die_offset ();
8581 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8583 if (sibling_ptr
< info_ptr
)
8584 complaint (_("DW_AT_sibling points backwards"));
8585 else if (sibling_ptr
> reader
->buffer_end
)
8586 reader
->die_section
->overflow_complaint ();
8592 /* If it isn't DW_AT_sibling, skip this attribute. */
8593 form
= abbrev
->attrs
[i
].form
;
8597 case DW_FORM_ref_addr
:
8598 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8599 and later it is offset sized. */
8600 if (cu
->header
.version
== 2)
8601 info_ptr
+= cu
->header
.addr_size
;
8603 info_ptr
+= cu
->header
.offset_size
;
8605 case DW_FORM_GNU_ref_alt
:
8606 info_ptr
+= cu
->header
.offset_size
;
8609 info_ptr
+= cu
->header
.addr_size
;
8617 case DW_FORM_flag_present
:
8618 case DW_FORM_implicit_const
:
8635 case DW_FORM_ref_sig8
:
8638 case DW_FORM_data16
:
8641 case DW_FORM_string
:
8642 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8643 info_ptr
+= bytes_read
;
8645 case DW_FORM_sec_offset
:
8647 case DW_FORM_GNU_strp_alt
:
8648 info_ptr
+= cu
->header
.offset_size
;
8650 case DW_FORM_exprloc
:
8652 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8653 info_ptr
+= bytes_read
;
8655 case DW_FORM_block1
:
8656 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8658 case DW_FORM_block2
:
8659 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8661 case DW_FORM_block4
:
8662 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8668 case DW_FORM_ref_udata
:
8669 case DW_FORM_GNU_addr_index
:
8670 case DW_FORM_GNU_str_index
:
8671 case DW_FORM_rnglistx
:
8672 case DW_FORM_loclistx
:
8673 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8675 case DW_FORM_indirect
:
8676 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8677 info_ptr
+= bytes_read
;
8678 /* We need to continue parsing from here, so just go back to
8680 goto skip_attribute
;
8683 error (_("Dwarf Error: Cannot handle %s "
8684 "in DWARF reader [in module %s]"),
8685 dwarf_form_name (form
),
8686 bfd_get_filename (abfd
));
8690 if (abbrev
->has_children
)
8691 return skip_children (reader
, info_ptr
);
8696 /* Locate ORIG_PDI's sibling.
8697 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8699 static const gdb_byte
*
8700 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8701 struct partial_die_info
*orig_pdi
,
8702 const gdb_byte
*info_ptr
)
8704 /* Do we know the sibling already? */
8706 if (orig_pdi
->sibling
)
8707 return orig_pdi
->sibling
;
8709 /* Are there any children to deal with? */
8711 if (!orig_pdi
->has_children
)
8714 /* Skip the children the long way. */
8716 return skip_children (reader
, info_ptr
);
8719 /* Expand this partial symbol table into a full symbol table. SELF is
8723 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8725 struct dwarf2_per_objfile
*dwarf2_per_objfile
8726 = get_dwarf2_per_objfile (objfile
);
8728 gdb_assert (!readin
);
8729 /* If this psymtab is constructed from a debug-only objfile, the
8730 has_section_at_zero flag will not necessarily be correct. We
8731 can get the correct value for this flag by looking at the data
8732 associated with the (presumably stripped) associated objfile. */
8733 if (objfile
->separate_debug_objfile_backlink
)
8735 struct dwarf2_per_objfile
*dpo_backlink
8736 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8738 dwarf2_per_objfile
->has_section_at_zero
8739 = dpo_backlink
->has_section_at_zero
;
8742 expand_psymtab (objfile
);
8744 process_cu_includes (dwarf2_per_objfile
);
8747 /* Reading in full CUs. */
8749 /* Add PER_CU to the queue. */
8752 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8753 enum language pretend_language
)
8756 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
8759 /* If PER_CU is not yet queued, add it to the queue.
8760 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8762 The result is non-zero if PER_CU was queued, otherwise the result is zero
8763 meaning either PER_CU is already queued or it is already loaded.
8765 N.B. There is an invariant here that if a CU is queued then it is loaded.
8766 The caller is required to load PER_CU if we return non-zero. */
8769 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8770 struct dwarf2_per_cu_data
*per_cu
,
8771 enum language pretend_language
)
8773 /* We may arrive here during partial symbol reading, if we need full
8774 DIEs to process an unusual case (e.g. template arguments). Do
8775 not queue PER_CU, just tell our caller to load its DIEs. */
8776 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
8778 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8783 /* Mark the dependence relation so that we don't flush PER_CU
8785 if (dependent_cu
!= NULL
)
8786 dwarf2_add_dependence (dependent_cu
, per_cu
);
8788 /* If it's already on the queue, we have nothing to do. */
8792 /* If the compilation unit is already loaded, just mark it as
8794 if (per_cu
->cu
!= NULL
)
8796 per_cu
->cu
->last_used
= 0;
8800 /* Add it to the queue. */
8801 queue_comp_unit (per_cu
, pretend_language
);
8806 /* Process the queue. */
8809 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8811 if (dwarf_read_debug
)
8813 fprintf_unfiltered (gdb_stdlog
,
8814 "Expanding one or more symtabs of objfile %s ...\n",
8815 objfile_name (dwarf2_per_objfile
->objfile
));
8818 /* The queue starts out with one item, but following a DIE reference
8819 may load a new CU, adding it to the end of the queue. */
8820 while (!dwarf2_per_objfile
->queue
.empty ())
8822 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
8824 if ((dwarf2_per_objfile
->using_index
8825 ? !item
.per_cu
->v
.quick
->compunit_symtab
8826 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8827 /* Skip dummy CUs. */
8828 && item
.per_cu
->cu
!= NULL
)
8830 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8831 unsigned int debug_print_threshold
;
8834 if (per_cu
->is_debug_types
)
8836 struct signatured_type
*sig_type
=
8837 (struct signatured_type
*) per_cu
;
8839 sprintf (buf
, "TU %s at offset %s",
8840 hex_string (sig_type
->signature
),
8841 sect_offset_str (per_cu
->sect_off
));
8842 /* There can be 100s of TUs.
8843 Only print them in verbose mode. */
8844 debug_print_threshold
= 2;
8848 sprintf (buf
, "CU at offset %s",
8849 sect_offset_str (per_cu
->sect_off
));
8850 debug_print_threshold
= 1;
8853 if (dwarf_read_debug
>= debug_print_threshold
)
8854 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8856 if (per_cu
->is_debug_types
)
8857 process_full_type_unit (per_cu
, item
.pretend_language
);
8859 process_full_comp_unit (per_cu
, item
.pretend_language
);
8861 if (dwarf_read_debug
>= debug_print_threshold
)
8862 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8865 item
.per_cu
->queued
= 0;
8866 dwarf2_per_objfile
->queue
.pop ();
8869 if (dwarf_read_debug
)
8871 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8872 objfile_name (dwarf2_per_objfile
->objfile
));
8876 /* Read in full symbols for PST, and anything it depends on. */
8879 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8881 gdb_assert (!readin
);
8883 expand_dependencies (objfile
);
8885 dw2_do_instantiate_symtab (per_cu_data
, false);
8886 gdb_assert (get_compunit_symtab () != nullptr);
8889 /* Trivial hash function for die_info: the hash value of a DIE
8890 is its offset in .debug_info for this objfile. */
8893 die_hash (const void *item
)
8895 const struct die_info
*die
= (const struct die_info
*) item
;
8897 return to_underlying (die
->sect_off
);
8900 /* Trivial comparison function for die_info structures: two DIEs
8901 are equal if they have the same offset. */
8904 die_eq (const void *item_lhs
, const void *item_rhs
)
8906 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8907 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8909 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8912 /* Load the DIEs associated with PER_CU into memory. */
8915 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8917 enum language pretend_language
)
8919 gdb_assert (! this_cu
->is_debug_types
);
8921 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
8925 struct dwarf2_cu
*cu
= reader
.cu
;
8926 const gdb_byte
*info_ptr
= reader
.info_ptr
;
8928 gdb_assert (cu
->die_hash
== NULL
);
8930 htab_create_alloc_ex (cu
->header
.length
/ 12,
8934 &cu
->comp_unit_obstack
,
8935 hashtab_obstack_allocate
,
8936 dummy_obstack_deallocate
);
8938 if (reader
.comp_unit_die
->has_children
)
8939 reader
.comp_unit_die
->child
8940 = read_die_and_siblings (&reader
, reader
.info_ptr
,
8941 &info_ptr
, reader
.comp_unit_die
);
8942 cu
->dies
= reader
.comp_unit_die
;
8943 /* comp_unit_die is not stored in die_hash, no need. */
8945 /* We try not to read any attributes in this function, because not
8946 all CUs needed for references have been loaded yet, and symbol
8947 table processing isn't initialized. But we have to set the CU language,
8948 or we won't be able to build types correctly.
8949 Similarly, if we do not read the producer, we can not apply
8950 producer-specific interpretation. */
8951 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
8956 /* Add a DIE to the delayed physname list. */
8959 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8960 const char *name
, struct die_info
*die
,
8961 struct dwarf2_cu
*cu
)
8963 struct delayed_method_info mi
;
8965 mi
.fnfield_index
= fnfield_index
;
8969 cu
->method_list
.push_back (mi
);
8972 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
8973 "const" / "volatile". If so, decrements LEN by the length of the
8974 modifier and return true. Otherwise return false. */
8978 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
8980 size_t mod_len
= sizeof (mod
) - 1;
8981 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
8989 /* Compute the physnames of any methods on the CU's method list.
8991 The computation of method physnames is delayed in order to avoid the
8992 (bad) condition that one of the method's formal parameters is of an as yet
8996 compute_delayed_physnames (struct dwarf2_cu
*cu
)
8998 /* Only C++ delays computing physnames. */
8999 if (cu
->method_list
.empty ())
9001 gdb_assert (cu
->language
== language_cplus
);
9003 for (const delayed_method_info
&mi
: cu
->method_list
)
9005 const char *physname
;
9006 struct fn_fieldlist
*fn_flp
9007 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9008 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9009 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9010 = physname
? physname
: "";
9012 /* Since there's no tag to indicate whether a method is a
9013 const/volatile overload, extract that information out of the
9015 if (physname
!= NULL
)
9017 size_t len
= strlen (physname
);
9021 if (physname
[len
] == ')') /* shortcut */
9023 else if (check_modifier (physname
, len
, " const"))
9024 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9025 else if (check_modifier (physname
, len
, " volatile"))
9026 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9033 /* The list is no longer needed. */
9034 cu
->method_list
.clear ();
9037 /* Go objects should be embedded in a DW_TAG_module DIE,
9038 and it's not clear if/how imported objects will appear.
9039 To keep Go support simple until that's worked out,
9040 go back through what we've read and create something usable.
9041 We could do this while processing each DIE, and feels kinda cleaner,
9042 but that way is more invasive.
9043 This is to, for example, allow the user to type "p var" or "b main"
9044 without having to specify the package name, and allow lookups
9045 of module.object to work in contexts that use the expression
9049 fixup_go_packaging (struct dwarf2_cu
*cu
)
9051 gdb::unique_xmalloc_ptr
<char> package_name
;
9052 struct pending
*list
;
9055 for (list
= *cu
->get_builder ()->get_global_symbols ();
9059 for (i
= 0; i
< list
->nsyms
; ++i
)
9061 struct symbol
*sym
= list
->symbol
[i
];
9063 if (sym
->language () == language_go
9064 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9066 gdb::unique_xmalloc_ptr
<char> this_package_name
9067 (go_symbol_package_name (sym
));
9069 if (this_package_name
== NULL
)
9071 if (package_name
== NULL
)
9072 package_name
= std::move (this_package_name
);
9075 struct objfile
*objfile
9076 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9077 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9078 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9079 (symbol_symtab (sym
) != NULL
9080 ? symtab_to_filename_for_display
9081 (symbol_symtab (sym
))
9082 : objfile_name (objfile
)),
9083 this_package_name
.get (), package_name
.get ());
9089 if (package_name
!= NULL
)
9091 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9092 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9093 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9094 saved_package_name
);
9097 sym
= allocate_symbol (objfile
);
9098 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9099 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9100 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9101 e.g., "main" finds the "main" module and not C's main(). */
9102 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9103 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9104 SYMBOL_TYPE (sym
) = type
;
9106 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9110 /* Allocate a fully-qualified name consisting of the two parts on the
9114 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9116 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9119 /* A helper that allocates a struct discriminant_info to attach to a
9122 static struct discriminant_info
*
9123 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9126 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9127 gdb_assert (discriminant_index
== -1
9128 || (discriminant_index
>= 0
9129 && discriminant_index
< TYPE_NFIELDS (type
)));
9130 gdb_assert (default_index
== -1
9131 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9133 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9135 struct discriminant_info
*disc
9136 = ((struct discriminant_info
*)
9138 offsetof (struct discriminant_info
, discriminants
)
9139 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9140 disc
->default_index
= default_index
;
9141 disc
->discriminant_index
= discriminant_index
;
9143 struct dynamic_prop prop
;
9144 prop
.kind
= PROP_UNDEFINED
;
9145 prop
.data
.baton
= disc
;
9147 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9152 /* Some versions of rustc emitted enums in an unusual way.
9154 Ordinary enums were emitted as unions. The first element of each
9155 structure in the union was named "RUST$ENUM$DISR". This element
9156 held the discriminant.
9158 These versions of Rust also implemented the "non-zero"
9159 optimization. When the enum had two values, and one is empty and
9160 the other holds a pointer that cannot be zero, the pointer is used
9161 as the discriminant, with a zero value meaning the empty variant.
9162 Here, the union's first member is of the form
9163 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9164 where the fieldnos are the indices of the fields that should be
9165 traversed in order to find the field (which may be several fields deep)
9166 and the variantname is the name of the variant of the case when the
9169 This function recognizes whether TYPE is of one of these forms,
9170 and, if so, smashes it to be a variant type. */
9173 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9175 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9177 /* We don't need to deal with empty enums. */
9178 if (TYPE_NFIELDS (type
) == 0)
9181 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9182 if (TYPE_NFIELDS (type
) == 1
9183 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9185 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9187 /* Decode the field name to find the offset of the
9189 ULONGEST bit_offset
= 0;
9190 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9191 while (name
[0] >= '0' && name
[0] <= '9')
9194 unsigned long index
= strtoul (name
, &tail
, 10);
9197 || index
>= TYPE_NFIELDS (field_type
)
9198 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9199 != FIELD_LOC_KIND_BITPOS
))
9201 complaint (_("Could not parse Rust enum encoding string \"%s\""
9203 TYPE_FIELD_NAME (type
, 0),
9204 objfile_name (objfile
));
9209 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9210 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9213 /* Make a union to hold the variants. */
9214 struct type
*union_type
= alloc_type (objfile
);
9215 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9216 TYPE_NFIELDS (union_type
) = 3;
9217 TYPE_FIELDS (union_type
)
9218 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9219 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9220 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9222 /* Put the discriminant must at index 0. */
9223 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9224 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9225 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9226 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9228 /* The order of fields doesn't really matter, so put the real
9229 field at index 1 and the data-less field at index 2. */
9230 struct discriminant_info
*disc
9231 = alloc_discriminant_info (union_type
, 0, 1);
9232 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9233 TYPE_FIELD_NAME (union_type
, 1)
9234 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9235 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9236 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9237 TYPE_FIELD_NAME (union_type
, 1));
9239 const char *dataless_name
9240 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9242 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9244 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9245 /* NAME points into the original discriminant name, which
9246 already has the correct lifetime. */
9247 TYPE_FIELD_NAME (union_type
, 2) = name
;
9248 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9249 disc
->discriminants
[2] = 0;
9251 /* Smash this type to be a structure type. We have to do this
9252 because the type has already been recorded. */
9253 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9254 TYPE_NFIELDS (type
) = 1;
9256 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9258 /* Install the variant part. */
9259 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9260 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9261 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9263 /* A union with a single anonymous field is probably an old-style
9265 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9267 /* Smash this type to be a structure type. We have to do this
9268 because the type has already been recorded. */
9269 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9271 /* Make a union to hold the variants. */
9272 struct type
*union_type
= alloc_type (objfile
);
9273 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9274 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9275 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9276 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9277 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9279 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9280 const char *variant_name
9281 = rust_last_path_segment (TYPE_NAME (field_type
));
9282 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9283 TYPE_NAME (field_type
)
9284 = rust_fully_qualify (&objfile
->objfile_obstack
,
9285 TYPE_NAME (type
), variant_name
);
9287 /* Install the union in the outer struct type. */
9288 TYPE_NFIELDS (type
) = 1;
9290 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9291 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9292 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9293 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9295 alloc_discriminant_info (union_type
, -1, 0);
9299 struct type
*disr_type
= nullptr;
9300 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9302 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9304 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9306 /* All fields of a true enum will be structs. */
9309 else if (TYPE_NFIELDS (disr_type
) == 0)
9311 /* Could be data-less variant, so keep going. */
9312 disr_type
= nullptr;
9314 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9315 "RUST$ENUM$DISR") != 0)
9317 /* Not a Rust enum. */
9327 /* If we got here without a discriminant, then it's probably
9329 if (disr_type
== nullptr)
9332 /* Smash this type to be a structure type. We have to do this
9333 because the type has already been recorded. */
9334 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9336 /* Make a union to hold the variants. */
9337 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9338 struct type
*union_type
= alloc_type (objfile
);
9339 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9340 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
9341 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9342 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9343 TYPE_FIELDS (union_type
)
9344 = (struct field
*) TYPE_ZALLOC (union_type
,
9345 (TYPE_NFIELDS (union_type
)
9346 * sizeof (struct field
)));
9348 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
9349 TYPE_NFIELDS (type
) * sizeof (struct field
));
9351 /* Install the discriminant at index 0 in the union. */
9352 TYPE_FIELD (union_type
, 0) = *disr_field
;
9353 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9354 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9356 /* Install the union in the outer struct type. */
9357 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9358 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9359 TYPE_NFIELDS (type
) = 1;
9361 /* Set the size and offset of the union type. */
9362 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9364 /* We need a way to find the correct discriminant given a
9365 variant name. For convenience we build a map here. */
9366 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9367 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9368 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
9370 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9373 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9374 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9378 int n_fields
= TYPE_NFIELDS (union_type
);
9379 struct discriminant_info
*disc
9380 = alloc_discriminant_info (union_type
, 0, -1);
9381 /* Skip the discriminant here. */
9382 for (int i
= 1; i
< n_fields
; ++i
)
9384 /* Find the final word in the name of this variant's type.
9385 That name can be used to look up the correct
9387 const char *variant_name
9388 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
9391 auto iter
= discriminant_map
.find (variant_name
);
9392 if (iter
!= discriminant_map
.end ())
9393 disc
->discriminants
[i
] = iter
->second
;
9395 /* Remove the discriminant field, if it exists. */
9396 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
9397 if (TYPE_NFIELDS (sub_type
) > 0)
9399 --TYPE_NFIELDS (sub_type
);
9400 ++TYPE_FIELDS (sub_type
);
9402 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
9403 TYPE_NAME (sub_type
)
9404 = rust_fully_qualify (&objfile
->objfile_obstack
,
9405 TYPE_NAME (type
), variant_name
);
9410 /* Rewrite some Rust unions to be structures with variants parts. */
9413 rust_union_quirks (struct dwarf2_cu
*cu
)
9415 gdb_assert (cu
->language
== language_rust
);
9416 for (type
*type_
: cu
->rust_unions
)
9417 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9418 /* We don't need this any more. */
9419 cu
->rust_unions
.clear ();
9422 /* Return the symtab for PER_CU. This works properly regardless of
9423 whether we're using the index or psymtabs. */
9425 static struct compunit_symtab
*
9426 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9428 return (per_cu
->dwarf2_per_objfile
->using_index
9429 ? per_cu
->v
.quick
->compunit_symtab
9430 : per_cu
->v
.psymtab
->compunit_symtab
);
9433 /* A helper function for computing the list of all symbol tables
9434 included by PER_CU. */
9437 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9438 htab_t all_children
, htab_t all_type_symtabs
,
9439 struct dwarf2_per_cu_data
*per_cu
,
9440 struct compunit_symtab
*immediate_parent
)
9443 struct compunit_symtab
*cust
;
9445 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9448 /* This inclusion and its children have been processed. */
9453 /* Only add a CU if it has a symbol table. */
9454 cust
= get_compunit_symtab (per_cu
);
9457 /* If this is a type unit only add its symbol table if we haven't
9458 seen it yet (type unit per_cu's can share symtabs). */
9459 if (per_cu
->is_debug_types
)
9461 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9465 result
->push_back (cust
);
9466 if (cust
->user
== NULL
)
9467 cust
->user
= immediate_parent
;
9472 result
->push_back (cust
);
9473 if (cust
->user
== NULL
)
9474 cust
->user
= immediate_parent
;
9478 if (!per_cu
->imported_symtabs_empty ())
9479 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9481 recursively_compute_inclusions (result
, all_children
,
9482 all_type_symtabs
, ptr
, cust
);
9486 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9490 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9492 gdb_assert (! per_cu
->is_debug_types
);
9494 if (!per_cu
->imported_symtabs_empty ())
9497 std::vector
<compunit_symtab
*> result_symtabs
;
9498 htab_t all_children
, all_type_symtabs
;
9499 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9501 /* If we don't have a symtab, we can just skip this case. */
9505 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9506 NULL
, xcalloc
, xfree
);
9507 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9508 NULL
, xcalloc
, xfree
);
9510 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9512 recursively_compute_inclusions (&result_symtabs
, all_children
,
9513 all_type_symtabs
, ptr
, cust
);
9516 /* Now we have a transitive closure of all the included symtabs. */
9517 len
= result_symtabs
.size ();
9519 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9520 struct compunit_symtab
*, len
+ 1);
9521 memcpy (cust
->includes
, result_symtabs
.data (),
9522 len
* sizeof (compunit_symtab
*));
9523 cust
->includes
[len
] = NULL
;
9525 htab_delete (all_children
);
9526 htab_delete (all_type_symtabs
);
9530 /* Compute the 'includes' field for the symtabs of all the CUs we just
9534 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9536 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9538 if (! iter
->is_debug_types
)
9539 compute_compunit_symtab_includes (iter
);
9542 dwarf2_per_objfile
->just_read_cus
.clear ();
9545 /* Generate full symbol information for PER_CU, whose DIEs have
9546 already been loaded into memory. */
9549 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9550 enum language pretend_language
)
9552 struct dwarf2_cu
*cu
= per_cu
->cu
;
9553 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9554 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9555 struct gdbarch
*gdbarch
= objfile
->arch ();
9556 CORE_ADDR lowpc
, highpc
;
9557 struct compunit_symtab
*cust
;
9559 struct block
*static_block
;
9562 baseaddr
= objfile
->text_section_offset ();
9564 /* Clear the list here in case something was left over. */
9565 cu
->method_list
.clear ();
9567 cu
->language
= pretend_language
;
9568 cu
->language_defn
= language_def (cu
->language
);
9570 /* Do line number decoding in read_file_scope () */
9571 process_die (cu
->dies
, cu
);
9573 /* For now fudge the Go package. */
9574 if (cu
->language
== language_go
)
9575 fixup_go_packaging (cu
);
9577 /* Now that we have processed all the DIEs in the CU, all the types
9578 should be complete, and it should now be safe to compute all of the
9580 compute_delayed_physnames (cu
);
9582 if (cu
->language
== language_rust
)
9583 rust_union_quirks (cu
);
9585 /* Some compilers don't define a DW_AT_high_pc attribute for the
9586 compilation unit. If the DW_AT_high_pc is missing, synthesize
9587 it, by scanning the DIE's below the compilation unit. */
9588 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9590 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9591 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9593 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9594 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9595 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9596 addrmap to help ensure it has an accurate map of pc values belonging to
9598 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9600 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9601 SECT_OFF_TEXT (objfile
),
9606 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9608 /* Set symtab language to language from DW_AT_language. If the
9609 compilation is from a C file generated by language preprocessors, do
9610 not set the language if it was already deduced by start_subfile. */
9611 if (!(cu
->language
== language_c
9612 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9613 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9615 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9616 produce DW_AT_location with location lists but it can be possibly
9617 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9618 there were bugs in prologue debug info, fixed later in GCC-4.5
9619 by "unwind info for epilogues" patch (which is not directly related).
9621 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9622 needed, it would be wrong due to missing DW_AT_producer there.
9624 Still one can confuse GDB by using non-standard GCC compilation
9625 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9627 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9628 cust
->locations_valid
= 1;
9630 if (gcc_4_minor
>= 5)
9631 cust
->epilogue_unwind_valid
= 1;
9633 cust
->call_site_htab
= cu
->call_site_htab
;
9636 if (dwarf2_per_objfile
->using_index
)
9637 per_cu
->v
.quick
->compunit_symtab
= cust
;
9640 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9641 pst
->compunit_symtab
= cust
;
9645 /* Push it for inclusion processing later. */
9646 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
9648 /* Not needed any more. */
9649 cu
->reset_builder ();
9652 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9653 already been loaded into memory. */
9656 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9657 enum language pretend_language
)
9659 struct dwarf2_cu
*cu
= per_cu
->cu
;
9660 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9661 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9662 struct compunit_symtab
*cust
;
9663 struct signatured_type
*sig_type
;
9665 gdb_assert (per_cu
->is_debug_types
);
9666 sig_type
= (struct signatured_type
*) per_cu
;
9668 /* Clear the list here in case something was left over. */
9669 cu
->method_list
.clear ();
9671 cu
->language
= pretend_language
;
9672 cu
->language_defn
= language_def (cu
->language
);
9674 /* The symbol tables are set up in read_type_unit_scope. */
9675 process_die (cu
->dies
, cu
);
9677 /* For now fudge the Go package. */
9678 if (cu
->language
== language_go
)
9679 fixup_go_packaging (cu
);
9681 /* Now that we have processed all the DIEs in the CU, all the types
9682 should be complete, and it should now be safe to compute all of the
9684 compute_delayed_physnames (cu
);
9686 if (cu
->language
== language_rust
)
9687 rust_union_quirks (cu
);
9689 /* TUs share symbol tables.
9690 If this is the first TU to use this symtab, complete the construction
9691 of it with end_expandable_symtab. Otherwise, complete the addition of
9692 this TU's symbols to the existing symtab. */
9693 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9695 buildsym_compunit
*builder
= cu
->get_builder ();
9696 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9697 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9701 /* Set symtab language to language from DW_AT_language. If the
9702 compilation is from a C file generated by language preprocessors,
9703 do not set the language if it was already deduced by
9705 if (!(cu
->language
== language_c
9706 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9707 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9712 cu
->get_builder ()->augment_type_symtab ();
9713 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9716 if (dwarf2_per_objfile
->using_index
)
9717 per_cu
->v
.quick
->compunit_symtab
= cust
;
9720 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9721 pst
->compunit_symtab
= cust
;
9725 /* Not needed any more. */
9726 cu
->reset_builder ();
9729 /* Process an imported unit DIE. */
9732 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9734 struct attribute
*attr
;
9736 /* For now we don't handle imported units in type units. */
9737 if (cu
->per_cu
->is_debug_types
)
9739 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9740 " supported in type units [in module %s]"),
9741 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9744 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9747 sect_offset sect_off
= attr
->get_ref_die_offset ();
9748 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9749 dwarf2_per_cu_data
*per_cu
9750 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9751 cu
->per_cu
->dwarf2_per_objfile
);
9753 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9754 into another compilation unit, at root level. Regard this as a hint,
9756 if (die
->parent
&& die
->parent
->parent
== NULL
9757 && per_cu
->unit_type
== DW_UT_compile
9758 && per_cu
->lang
== language_cplus
)
9761 /* If necessary, add it to the queue and load its DIEs. */
9762 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9763 load_full_comp_unit (per_cu
, false, cu
->language
);
9765 cu
->per_cu
->imported_symtabs_push (per_cu
);
9769 /* RAII object that represents a process_die scope: i.e.,
9770 starts/finishes processing a DIE. */
9771 class process_die_scope
9774 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9775 : m_die (die
), m_cu (cu
)
9777 /* We should only be processing DIEs not already in process. */
9778 gdb_assert (!m_die
->in_process
);
9779 m_die
->in_process
= true;
9782 ~process_die_scope ()
9784 m_die
->in_process
= false;
9786 /* If we're done processing the DIE for the CU that owns the line
9787 header, we don't need the line header anymore. */
9788 if (m_cu
->line_header_die_owner
== m_die
)
9790 delete m_cu
->line_header
;
9791 m_cu
->line_header
= NULL
;
9792 m_cu
->line_header_die_owner
= NULL
;
9801 /* Process a die and its children. */
9804 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9806 process_die_scope
scope (die
, cu
);
9810 case DW_TAG_padding
:
9812 case DW_TAG_compile_unit
:
9813 case DW_TAG_partial_unit
:
9814 read_file_scope (die
, cu
);
9816 case DW_TAG_type_unit
:
9817 read_type_unit_scope (die
, cu
);
9819 case DW_TAG_subprogram
:
9820 /* Nested subprograms in Fortran get a prefix. */
9821 if (cu
->language
== language_fortran
9822 && die
->parent
!= NULL
9823 && die
->parent
->tag
== DW_TAG_subprogram
)
9824 cu
->processing_has_namespace_info
= true;
9826 case DW_TAG_inlined_subroutine
:
9827 read_func_scope (die
, cu
);
9829 case DW_TAG_lexical_block
:
9830 case DW_TAG_try_block
:
9831 case DW_TAG_catch_block
:
9832 read_lexical_block_scope (die
, cu
);
9834 case DW_TAG_call_site
:
9835 case DW_TAG_GNU_call_site
:
9836 read_call_site_scope (die
, cu
);
9838 case DW_TAG_class_type
:
9839 case DW_TAG_interface_type
:
9840 case DW_TAG_structure_type
:
9841 case DW_TAG_union_type
:
9842 process_structure_scope (die
, cu
);
9844 case DW_TAG_enumeration_type
:
9845 process_enumeration_scope (die
, cu
);
9848 /* These dies have a type, but processing them does not create
9849 a symbol or recurse to process the children. Therefore we can
9850 read them on-demand through read_type_die. */
9851 case DW_TAG_subroutine_type
:
9852 case DW_TAG_set_type
:
9853 case DW_TAG_array_type
:
9854 case DW_TAG_pointer_type
:
9855 case DW_TAG_ptr_to_member_type
:
9856 case DW_TAG_reference_type
:
9857 case DW_TAG_rvalue_reference_type
:
9858 case DW_TAG_string_type
:
9861 case DW_TAG_base_type
:
9862 case DW_TAG_subrange_type
:
9863 case DW_TAG_typedef
:
9864 /* Add a typedef symbol for the type definition, if it has a
9866 new_symbol (die
, read_type_die (die
, cu
), cu
);
9868 case DW_TAG_common_block
:
9869 read_common_block (die
, cu
);
9871 case DW_TAG_common_inclusion
:
9873 case DW_TAG_namespace
:
9874 cu
->processing_has_namespace_info
= true;
9875 read_namespace (die
, cu
);
9878 cu
->processing_has_namespace_info
= true;
9879 read_module (die
, cu
);
9881 case DW_TAG_imported_declaration
:
9882 cu
->processing_has_namespace_info
= true;
9883 if (read_namespace_alias (die
, cu
))
9885 /* The declaration is not a global namespace alias. */
9887 case DW_TAG_imported_module
:
9888 cu
->processing_has_namespace_info
= true;
9889 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9890 || cu
->language
!= language_fortran
))
9891 complaint (_("Tag '%s' has unexpected children"),
9892 dwarf_tag_name (die
->tag
));
9893 read_import_statement (die
, cu
);
9896 case DW_TAG_imported_unit
:
9897 process_imported_unit_die (die
, cu
);
9900 case DW_TAG_variable
:
9901 read_variable (die
, cu
);
9905 new_symbol (die
, NULL
, cu
);
9910 /* DWARF name computation. */
9912 /* A helper function for dwarf2_compute_name which determines whether DIE
9913 needs to have the name of the scope prepended to the name listed in the
9917 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9919 struct attribute
*attr
;
9923 case DW_TAG_namespace
:
9924 case DW_TAG_typedef
:
9925 case DW_TAG_class_type
:
9926 case DW_TAG_interface_type
:
9927 case DW_TAG_structure_type
:
9928 case DW_TAG_union_type
:
9929 case DW_TAG_enumeration_type
:
9930 case DW_TAG_enumerator
:
9931 case DW_TAG_subprogram
:
9932 case DW_TAG_inlined_subroutine
:
9934 case DW_TAG_imported_declaration
:
9937 case DW_TAG_variable
:
9938 case DW_TAG_constant
:
9939 /* We only need to prefix "globally" visible variables. These include
9940 any variable marked with DW_AT_external or any variable that
9941 lives in a namespace. [Variables in anonymous namespaces
9942 require prefixing, but they are not DW_AT_external.] */
9944 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
9946 struct dwarf2_cu
*spec_cu
= cu
;
9948 return die_needs_namespace (die_specification (die
, &spec_cu
),
9952 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9953 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
9954 && die
->parent
->tag
!= DW_TAG_module
)
9956 /* A variable in a lexical block of some kind does not need a
9957 namespace, even though in C++ such variables may be external
9958 and have a mangled name. */
9959 if (die
->parent
->tag
== DW_TAG_lexical_block
9960 || die
->parent
->tag
== DW_TAG_try_block
9961 || die
->parent
->tag
== DW_TAG_catch_block
9962 || die
->parent
->tag
== DW_TAG_subprogram
)
9971 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
9972 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9973 defined for the given DIE. */
9975 static struct attribute
*
9976 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
9978 struct attribute
*attr
;
9980 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
9982 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9987 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
9988 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9989 defined for the given DIE. */
9992 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9994 const char *linkage_name
;
9996 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
9997 if (linkage_name
== NULL
)
9998 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10000 return linkage_name
;
10003 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10004 compute the physname for the object, which include a method's:
10005 - formal parameters (C++),
10006 - receiver type (Go),
10008 The term "physname" is a bit confusing.
10009 For C++, for example, it is the demangled name.
10010 For Go, for example, it's the mangled name.
10012 For Ada, return the DIE's linkage name rather than the fully qualified
10013 name. PHYSNAME is ignored..
10015 The result is allocated on the objfile_obstack and canonicalized. */
10017 static const char *
10018 dwarf2_compute_name (const char *name
,
10019 struct die_info
*die
, struct dwarf2_cu
*cu
,
10022 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10025 name
= dwarf2_name (die
, cu
);
10027 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10028 but otherwise compute it by typename_concat inside GDB.
10029 FIXME: Actually this is not really true, or at least not always true.
10030 It's all very confusing. compute_and_set_names doesn't try to demangle
10031 Fortran names because there is no mangling standard. So new_symbol
10032 will set the demangled name to the result of dwarf2_full_name, and it is
10033 the demangled name that GDB uses if it exists. */
10034 if (cu
->language
== language_ada
10035 || (cu
->language
== language_fortran
&& physname
))
10037 /* For Ada unit, we prefer the linkage name over the name, as
10038 the former contains the exported name, which the user expects
10039 to be able to reference. Ideally, we want the user to be able
10040 to reference this entity using either natural or linkage name,
10041 but we haven't started looking at this enhancement yet. */
10042 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10044 if (linkage_name
!= NULL
)
10045 return linkage_name
;
10048 /* These are the only languages we know how to qualify names in. */
10050 && (cu
->language
== language_cplus
10051 || cu
->language
== language_fortran
|| cu
->language
== language_d
10052 || cu
->language
== language_rust
))
10054 if (die_needs_namespace (die
, cu
))
10056 const char *prefix
;
10057 const char *canonical_name
= NULL
;
10061 prefix
= determine_prefix (die
, cu
);
10062 if (*prefix
!= '\0')
10064 gdb::unique_xmalloc_ptr
<char> prefixed_name
10065 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10067 buf
.puts (prefixed_name
.get ());
10072 /* Template parameters may be specified in the DIE's DW_AT_name, or
10073 as children with DW_TAG_template_type_param or
10074 DW_TAG_value_type_param. If the latter, add them to the name
10075 here. If the name already has template parameters, then
10076 skip this step; some versions of GCC emit both, and
10077 it is more efficient to use the pre-computed name.
10079 Something to keep in mind about this process: it is very
10080 unlikely, or in some cases downright impossible, to produce
10081 something that will match the mangled name of a function.
10082 If the definition of the function has the same debug info,
10083 we should be able to match up with it anyway. But fallbacks
10084 using the minimal symbol, for instance to find a method
10085 implemented in a stripped copy of libstdc++, will not work.
10086 If we do not have debug info for the definition, we will have to
10087 match them up some other way.
10089 When we do name matching there is a related problem with function
10090 templates; two instantiated function templates are allowed to
10091 differ only by their return types, which we do not add here. */
10093 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10095 struct attribute
*attr
;
10096 struct die_info
*child
;
10099 die
->building_fullname
= 1;
10101 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10105 const gdb_byte
*bytes
;
10106 struct dwarf2_locexpr_baton
*baton
;
10109 if (child
->tag
!= DW_TAG_template_type_param
10110 && child
->tag
!= DW_TAG_template_value_param
)
10121 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10124 complaint (_("template parameter missing DW_AT_type"));
10125 buf
.puts ("UNKNOWN_TYPE");
10128 type
= die_type (child
, cu
);
10130 if (child
->tag
== DW_TAG_template_type_param
)
10132 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10133 &type_print_raw_options
);
10137 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10140 complaint (_("template parameter missing "
10141 "DW_AT_const_value"));
10142 buf
.puts ("UNKNOWN_VALUE");
10146 dwarf2_const_value_attr (attr
, type
, name
,
10147 &cu
->comp_unit_obstack
, cu
,
10148 &value
, &bytes
, &baton
);
10150 if (TYPE_NOSIGN (type
))
10151 /* GDB prints characters as NUMBER 'CHAR'. If that's
10152 changed, this can use value_print instead. */
10153 c_printchar (value
, type
, &buf
);
10156 struct value_print_options opts
;
10159 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10163 else if (bytes
!= NULL
)
10165 v
= allocate_value (type
);
10166 memcpy (value_contents_writeable (v
), bytes
,
10167 TYPE_LENGTH (type
));
10170 v
= value_from_longest (type
, value
);
10172 /* Specify decimal so that we do not depend on
10174 get_formatted_print_options (&opts
, 'd');
10176 value_print (v
, &buf
, &opts
);
10181 die
->building_fullname
= 0;
10185 /* Close the argument list, with a space if necessary
10186 (nested templates). */
10187 if (!buf
.empty () && buf
.string ().back () == '>')
10194 /* For C++ methods, append formal parameter type
10195 information, if PHYSNAME. */
10197 if (physname
&& die
->tag
== DW_TAG_subprogram
10198 && cu
->language
== language_cplus
)
10200 struct type
*type
= read_type_die (die
, cu
);
10202 c_type_print_args (type
, &buf
, 1, cu
->language
,
10203 &type_print_raw_options
);
10205 if (cu
->language
== language_cplus
)
10207 /* Assume that an artificial first parameter is
10208 "this", but do not crash if it is not. RealView
10209 marks unnamed (and thus unused) parameters as
10210 artificial; there is no way to differentiate
10212 if (TYPE_NFIELDS (type
) > 0
10213 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10214 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10215 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10217 buf
.puts (" const");
10221 const std::string
&intermediate_name
= buf
.string ();
10223 if (cu
->language
== language_cplus
)
10225 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10228 /* If we only computed INTERMEDIATE_NAME, or if
10229 INTERMEDIATE_NAME is already canonical, then we need to
10231 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10232 name
= objfile
->intern (intermediate_name
);
10234 name
= canonical_name
;
10241 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10242 If scope qualifiers are appropriate they will be added. The result
10243 will be allocated on the storage_obstack, or NULL if the DIE does
10244 not have a name. NAME may either be from a previous call to
10245 dwarf2_name or NULL.
10247 The output string will be canonicalized (if C++). */
10249 static const char *
10250 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10252 return dwarf2_compute_name (name
, die
, cu
, 0);
10255 /* Construct a physname for the given DIE in CU. NAME may either be
10256 from a previous call to dwarf2_name or NULL. The result will be
10257 allocated on the objfile_objstack or NULL if the DIE does not have a
10260 The output string will be canonicalized (if C++). */
10262 static const char *
10263 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10265 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10266 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10269 /* In this case dwarf2_compute_name is just a shortcut not building anything
10271 if (!die_needs_namespace (die
, cu
))
10272 return dwarf2_compute_name (name
, die
, cu
, 1);
10274 mangled
= dw2_linkage_name (die
, cu
);
10276 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10277 See https://github.com/rust-lang/rust/issues/32925. */
10278 if (cu
->language
== language_rust
&& mangled
!= NULL
10279 && strchr (mangled
, '{') != NULL
)
10282 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10284 gdb::unique_xmalloc_ptr
<char> demangled
;
10285 if (mangled
!= NULL
)
10288 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10290 /* Do nothing (do not demangle the symbol name). */
10292 else if (cu
->language
== language_go
)
10294 /* This is a lie, but we already lie to the caller new_symbol.
10295 new_symbol assumes we return the mangled name.
10296 This just undoes that lie until things are cleaned up. */
10300 /* Use DMGL_RET_DROP for C++ template functions to suppress
10301 their return type. It is easier for GDB users to search
10302 for such functions as `name(params)' than `long name(params)'.
10303 In such case the minimal symbol names do not match the full
10304 symbol names but for template functions there is never a need
10305 to look up their definition from their declaration so
10306 the only disadvantage remains the minimal symbol variant
10307 `long name(params)' does not have the proper inferior type. */
10308 demangled
.reset (gdb_demangle (mangled
,
10309 (DMGL_PARAMS
| DMGL_ANSI
10310 | DMGL_RET_DROP
)));
10313 canon
= demangled
.get ();
10321 if (canon
== NULL
|| check_physname
)
10323 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10325 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10327 /* It may not mean a bug in GDB. The compiler could also
10328 compute DW_AT_linkage_name incorrectly. But in such case
10329 GDB would need to be bug-to-bug compatible. */
10331 complaint (_("Computed physname <%s> does not match demangled <%s> "
10332 "(from linkage <%s>) - DIE at %s [in module %s]"),
10333 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10334 objfile_name (objfile
));
10336 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10337 is available here - over computed PHYSNAME. It is safer
10338 against both buggy GDB and buggy compilers. */
10352 retval
= objfile
->intern (retval
);
10357 /* Inspect DIE in CU for a namespace alias. If one exists, record
10358 a new symbol for it.
10360 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10363 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10365 struct attribute
*attr
;
10367 /* If the die does not have a name, this is not a namespace
10369 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10373 struct die_info
*d
= die
;
10374 struct dwarf2_cu
*imported_cu
= cu
;
10376 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10377 keep inspecting DIEs until we hit the underlying import. */
10378 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10379 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10381 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10385 d
= follow_die_ref (d
, attr
, &imported_cu
);
10386 if (d
->tag
!= DW_TAG_imported_declaration
)
10390 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10392 complaint (_("DIE at %s has too many recursively imported "
10393 "declarations"), sect_offset_str (d
->sect_off
));
10400 sect_offset sect_off
= attr
->get_ref_die_offset ();
10402 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10403 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
10405 /* This declaration is a global namespace alias. Add
10406 a symbol for it whose type is the aliased namespace. */
10407 new_symbol (die
, type
, cu
);
10416 /* Return the using directives repository (global or local?) to use in the
10417 current context for CU.
10419 For Ada, imported declarations can materialize renamings, which *may* be
10420 global. However it is impossible (for now?) in DWARF to distinguish
10421 "external" imported declarations and "static" ones. As all imported
10422 declarations seem to be static in all other languages, make them all CU-wide
10423 global only in Ada. */
10425 static struct using_direct
**
10426 using_directives (struct dwarf2_cu
*cu
)
10428 if (cu
->language
== language_ada
10429 && cu
->get_builder ()->outermost_context_p ())
10430 return cu
->get_builder ()->get_global_using_directives ();
10432 return cu
->get_builder ()->get_local_using_directives ();
10435 /* Read the import statement specified by the given die and record it. */
10438 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10440 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10441 struct attribute
*import_attr
;
10442 struct die_info
*imported_die
, *child_die
;
10443 struct dwarf2_cu
*imported_cu
;
10444 const char *imported_name
;
10445 const char *imported_name_prefix
;
10446 const char *canonical_name
;
10447 const char *import_alias
;
10448 const char *imported_declaration
= NULL
;
10449 const char *import_prefix
;
10450 std::vector
<const char *> excludes
;
10452 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10453 if (import_attr
== NULL
)
10455 complaint (_("Tag '%s' has no DW_AT_import"),
10456 dwarf_tag_name (die
->tag
));
10461 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10462 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10463 if (imported_name
== NULL
)
10465 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10467 The import in the following code:
10481 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10482 <52> DW_AT_decl_file : 1
10483 <53> DW_AT_decl_line : 6
10484 <54> DW_AT_import : <0x75>
10485 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10486 <59> DW_AT_name : B
10487 <5b> DW_AT_decl_file : 1
10488 <5c> DW_AT_decl_line : 2
10489 <5d> DW_AT_type : <0x6e>
10491 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10492 <76> DW_AT_byte_size : 4
10493 <77> DW_AT_encoding : 5 (signed)
10495 imports the wrong die ( 0x75 instead of 0x58 ).
10496 This case will be ignored until the gcc bug is fixed. */
10500 /* Figure out the local name after import. */
10501 import_alias
= dwarf2_name (die
, cu
);
10503 /* Figure out where the statement is being imported to. */
10504 import_prefix
= determine_prefix (die
, cu
);
10506 /* Figure out what the scope of the imported die is and prepend it
10507 to the name of the imported die. */
10508 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10510 if (imported_die
->tag
!= DW_TAG_namespace
10511 && imported_die
->tag
!= DW_TAG_module
)
10513 imported_declaration
= imported_name
;
10514 canonical_name
= imported_name_prefix
;
10516 else if (strlen (imported_name_prefix
) > 0)
10517 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10518 imported_name_prefix
,
10519 (cu
->language
== language_d
? "." : "::"),
10520 imported_name
, (char *) NULL
);
10522 canonical_name
= imported_name
;
10524 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10525 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10526 child_die
= child_die
->sibling
)
10528 /* DWARF-4: A Fortran use statement with a “rename list” may be
10529 represented by an imported module entry with an import attribute
10530 referring to the module and owned entries corresponding to those
10531 entities that are renamed as part of being imported. */
10533 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10535 complaint (_("child DW_TAG_imported_declaration expected "
10536 "- DIE at %s [in module %s]"),
10537 sect_offset_str (child_die
->sect_off
),
10538 objfile_name (objfile
));
10542 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10543 if (import_attr
== NULL
)
10545 complaint (_("Tag '%s' has no DW_AT_import"),
10546 dwarf_tag_name (child_die
->tag
));
10551 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10553 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10554 if (imported_name
== NULL
)
10556 complaint (_("child DW_TAG_imported_declaration has unknown "
10557 "imported name - DIE at %s [in module %s]"),
10558 sect_offset_str (child_die
->sect_off
),
10559 objfile_name (objfile
));
10563 excludes
.push_back (imported_name
);
10565 process_die (child_die
, cu
);
10568 add_using_directive (using_directives (cu
),
10572 imported_declaration
,
10575 &objfile
->objfile_obstack
);
10578 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10579 types, but gives them a size of zero. Starting with version 14,
10580 ICC is compatible with GCC. */
10583 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10585 if (!cu
->checked_producer
)
10586 check_producer (cu
);
10588 return cu
->producer_is_icc_lt_14
;
10591 /* ICC generates a DW_AT_type for C void functions. This was observed on
10592 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10593 which says that void functions should not have a DW_AT_type. */
10596 producer_is_icc (struct dwarf2_cu
*cu
)
10598 if (!cu
->checked_producer
)
10599 check_producer (cu
);
10601 return cu
->producer_is_icc
;
10604 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10605 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10606 this, it was first present in GCC release 4.3.0. */
10609 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10611 if (!cu
->checked_producer
)
10612 check_producer (cu
);
10614 return cu
->producer_is_gcc_lt_4_3
;
10617 static file_and_directory
10618 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10620 file_and_directory res
;
10622 /* Find the filename. Do not use dwarf2_name here, since the filename
10623 is not a source language identifier. */
10624 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10625 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10627 if (res
.comp_dir
== NULL
10628 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10629 && IS_ABSOLUTE_PATH (res
.name
))
10631 res
.comp_dir_storage
= ldirname (res
.name
);
10632 if (!res
.comp_dir_storage
.empty ())
10633 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10635 if (res
.comp_dir
!= NULL
)
10637 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10638 directory, get rid of it. */
10639 const char *cp
= strchr (res
.comp_dir
, ':');
10641 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10642 res
.comp_dir
= cp
+ 1;
10645 if (res
.name
== NULL
)
10646 res
.name
= "<unknown>";
10651 /* Handle DW_AT_stmt_list for a compilation unit.
10652 DIE is the DW_TAG_compile_unit die for CU.
10653 COMP_DIR is the compilation directory. LOWPC is passed to
10654 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10657 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10658 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10660 struct dwarf2_per_objfile
*dwarf2_per_objfile
10661 = cu
->per_cu
->dwarf2_per_objfile
;
10662 struct attribute
*attr
;
10663 struct line_header line_header_local
;
10664 hashval_t line_header_local_hash
;
10666 int decode_mapping
;
10668 gdb_assert (! cu
->per_cu
->is_debug_types
);
10670 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10674 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10676 /* The line header hash table is only created if needed (it exists to
10677 prevent redundant reading of the line table for partial_units).
10678 If we're given a partial_unit, we'll need it. If we're given a
10679 compile_unit, then use the line header hash table if it's already
10680 created, but don't create one just yet. */
10682 if (dwarf2_per_objfile
->line_header_hash
== NULL
10683 && die
->tag
== DW_TAG_partial_unit
)
10685 dwarf2_per_objfile
->line_header_hash
10686 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10687 line_header_eq_voidp
,
10688 free_line_header_voidp
,
10692 line_header_local
.sect_off
= line_offset
;
10693 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10694 line_header_local_hash
= line_header_hash (&line_header_local
);
10695 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10697 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10698 &line_header_local
,
10699 line_header_local_hash
, NO_INSERT
);
10701 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10702 is not present in *SLOT (since if there is something in *SLOT then
10703 it will be for a partial_unit). */
10704 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10706 gdb_assert (*slot
!= NULL
);
10707 cu
->line_header
= (struct line_header
*) *slot
;
10712 /* dwarf_decode_line_header does not yet provide sufficient information.
10713 We always have to call also dwarf_decode_lines for it. */
10714 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10718 cu
->line_header
= lh
.release ();
10719 cu
->line_header_die_owner
= die
;
10721 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10725 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10726 &line_header_local
,
10727 line_header_local_hash
, INSERT
);
10728 gdb_assert (slot
!= NULL
);
10730 if (slot
!= NULL
&& *slot
== NULL
)
10732 /* This newly decoded line number information unit will be owned
10733 by line_header_hash hash table. */
10734 *slot
= cu
->line_header
;
10735 cu
->line_header_die_owner
= NULL
;
10739 /* We cannot free any current entry in (*slot) as that struct line_header
10740 may be already used by multiple CUs. Create only temporary decoded
10741 line_header for this CU - it may happen at most once for each line
10742 number information unit. And if we're not using line_header_hash
10743 then this is what we want as well. */
10744 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10746 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10747 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10752 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10755 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10757 struct dwarf2_per_objfile
*dwarf2_per_objfile
10758 = cu
->per_cu
->dwarf2_per_objfile
;
10759 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10760 struct gdbarch
*gdbarch
= objfile
->arch ();
10761 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10762 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10763 struct attribute
*attr
;
10764 struct die_info
*child_die
;
10765 CORE_ADDR baseaddr
;
10767 prepare_one_comp_unit (cu
, die
, cu
->language
);
10768 baseaddr
= objfile
->text_section_offset ();
10770 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10772 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10773 from finish_block. */
10774 if (lowpc
== ((CORE_ADDR
) -1))
10776 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10778 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10780 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10781 standardised yet. As a workaround for the language detection we fall
10782 back to the DW_AT_producer string. */
10783 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10784 cu
->language
= language_opencl
;
10786 /* Similar hack for Go. */
10787 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10788 set_cu_language (DW_LANG_Go
, cu
);
10790 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10792 /* Decode line number information if present. We do this before
10793 processing child DIEs, so that the line header table is available
10794 for DW_AT_decl_file. */
10795 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10797 /* Process all dies in compilation unit. */
10798 if (die
->child
!= NULL
)
10800 child_die
= die
->child
;
10801 while (child_die
&& child_die
->tag
)
10803 process_die (child_die
, cu
);
10804 child_die
= child_die
->sibling
;
10808 /* Decode macro information, if present. Dwarf 2 macro information
10809 refers to information in the line number info statement program
10810 header, so we can only read it if we've read the header
10812 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10814 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10815 if (attr
&& cu
->line_header
)
10817 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10818 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10820 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10824 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10825 if (attr
&& cu
->line_header
)
10827 unsigned int macro_offset
= DW_UNSND (attr
);
10829 dwarf_decode_macros (cu
, macro_offset
, 0);
10835 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10837 struct type_unit_group
*tu_group
;
10839 struct attribute
*attr
;
10841 struct signatured_type
*sig_type
;
10843 gdb_assert (per_cu
->is_debug_types
);
10844 sig_type
= (struct signatured_type
*) per_cu
;
10846 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10848 /* If we're using .gdb_index (includes -readnow) then
10849 per_cu->type_unit_group may not have been set up yet. */
10850 if (sig_type
->type_unit_group
== NULL
)
10851 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10852 tu_group
= sig_type
->type_unit_group
;
10854 /* If we've already processed this stmt_list there's no real need to
10855 do it again, we could fake it and just recreate the part we need
10856 (file name,index -> symtab mapping). If data shows this optimization
10857 is useful we can do it then. */
10858 first_time
= tu_group
->compunit_symtab
== NULL
;
10860 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10865 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10866 lh
= dwarf_decode_line_header (line_offset
, this);
10871 start_symtab ("", NULL
, 0);
10874 gdb_assert (tu_group
->symtabs
== NULL
);
10875 gdb_assert (m_builder
== nullptr);
10876 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10877 m_builder
.reset (new struct buildsym_compunit
10878 (COMPUNIT_OBJFILE (cust
), "",
10879 COMPUNIT_DIRNAME (cust
),
10880 compunit_language (cust
),
10886 line_header
= lh
.release ();
10887 line_header_die_owner
= die
;
10891 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
10893 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10894 still initializing it, and our caller (a few levels up)
10895 process_full_type_unit still needs to know if this is the first
10899 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
10900 struct symtab
*, line_header
->file_names_size ());
10902 auto &file_names
= line_header
->file_names ();
10903 for (i
= 0; i
< file_names
.size (); ++i
)
10905 file_entry
&fe
= file_names
[i
];
10906 dwarf2_start_subfile (this, fe
.name
,
10907 fe
.include_dir (line_header
));
10908 buildsym_compunit
*b
= get_builder ();
10909 if (b
->get_current_subfile ()->symtab
== NULL
)
10911 /* NOTE: start_subfile will recognize when it's been
10912 passed a file it has already seen. So we can't
10913 assume there's a simple mapping from
10914 cu->line_header->file_names to subfiles, plus
10915 cu->line_header->file_names may contain dups. */
10916 b
->get_current_subfile ()->symtab
10917 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
10920 fe
.symtab
= b
->get_current_subfile ()->symtab
;
10921 tu_group
->symtabs
[i
] = fe
.symtab
;
10926 gdb_assert (m_builder
== nullptr);
10927 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10928 m_builder
.reset (new struct buildsym_compunit
10929 (COMPUNIT_OBJFILE (cust
), "",
10930 COMPUNIT_DIRNAME (cust
),
10931 compunit_language (cust
),
10934 auto &file_names
= line_header
->file_names ();
10935 for (i
= 0; i
< file_names
.size (); ++i
)
10937 file_entry
&fe
= file_names
[i
];
10938 fe
.symtab
= tu_group
->symtabs
[i
];
10942 /* The main symtab is allocated last. Type units don't have DW_AT_name
10943 so they don't have a "real" (so to speak) symtab anyway.
10944 There is later code that will assign the main symtab to all symbols
10945 that don't have one. We need to handle the case of a symbol with a
10946 missing symtab (DW_AT_decl_file) anyway. */
10949 /* Process DW_TAG_type_unit.
10950 For TUs we want to skip the first top level sibling if it's not the
10951 actual type being defined by this TU. In this case the first top
10952 level sibling is there to provide context only. */
10955 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10957 struct die_info
*child_die
;
10959 prepare_one_comp_unit (cu
, die
, language_minimal
);
10961 /* Initialize (or reinitialize) the machinery for building symtabs.
10962 We do this before processing child DIEs, so that the line header table
10963 is available for DW_AT_decl_file. */
10964 cu
->setup_type_unit_groups (die
);
10966 if (die
->child
!= NULL
)
10968 child_die
= die
->child
;
10969 while (child_die
&& child_die
->tag
)
10971 process_die (child_die
, cu
);
10972 child_die
= child_die
->sibling
;
10979 http://gcc.gnu.org/wiki/DebugFission
10980 http://gcc.gnu.org/wiki/DebugFissionDWP
10982 To simplify handling of both DWO files ("object" files with the DWARF info)
10983 and DWP files (a file with the DWOs packaged up into one file), we treat
10984 DWP files as having a collection of virtual DWO files. */
10987 hash_dwo_file (const void *item
)
10989 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
10992 hash
= htab_hash_string (dwo_file
->dwo_name
);
10993 if (dwo_file
->comp_dir
!= NULL
)
10994 hash
+= htab_hash_string (dwo_file
->comp_dir
);
10999 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11001 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11002 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11004 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11006 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11007 return lhs
->comp_dir
== rhs
->comp_dir
;
11008 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11011 /* Allocate a hash table for DWO files. */
11014 allocate_dwo_file_hash_table ()
11016 auto delete_dwo_file
= [] (void *item
)
11018 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11023 return htab_up (htab_create_alloc (41,
11030 /* Lookup DWO file DWO_NAME. */
11033 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11034 const char *dwo_name
,
11035 const char *comp_dir
)
11037 struct dwo_file find_entry
;
11040 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11041 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
11043 find_entry
.dwo_name
= dwo_name
;
11044 find_entry
.comp_dir
= comp_dir
;
11045 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11052 hash_dwo_unit (const void *item
)
11054 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11056 /* This drops the top 32 bits of the id, but is ok for a hash. */
11057 return dwo_unit
->signature
;
11061 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11063 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11064 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11066 /* The signature is assumed to be unique within the DWO file.
11067 So while object file CU dwo_id's always have the value zero,
11068 that's OK, assuming each object file DWO file has only one CU,
11069 and that's the rule for now. */
11070 return lhs
->signature
== rhs
->signature
;
11073 /* Allocate a hash table for DWO CUs,TUs.
11074 There is one of these tables for each of CUs,TUs for each DWO file. */
11077 allocate_dwo_unit_table ()
11079 /* Start out with a pretty small number.
11080 Generally DWO files contain only one CU and maybe some TUs. */
11081 return htab_up (htab_create_alloc (3,
11084 NULL
, xcalloc
, xfree
));
11087 /* die_reader_func for create_dwo_cu. */
11090 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11091 const gdb_byte
*info_ptr
,
11092 struct die_info
*comp_unit_die
,
11093 struct dwo_file
*dwo_file
,
11094 struct dwo_unit
*dwo_unit
)
11096 struct dwarf2_cu
*cu
= reader
->cu
;
11097 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11098 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11100 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11101 if (!signature
.has_value ())
11103 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11104 " its dwo_id [in module %s]"),
11105 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11109 dwo_unit
->dwo_file
= dwo_file
;
11110 dwo_unit
->signature
= *signature
;
11111 dwo_unit
->section
= section
;
11112 dwo_unit
->sect_off
= sect_off
;
11113 dwo_unit
->length
= cu
->per_cu
->length
;
11115 if (dwarf_read_debug
)
11116 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11117 sect_offset_str (sect_off
),
11118 hex_string (dwo_unit
->signature
));
11121 /* Create the dwo_units for the CUs in a DWO_FILE.
11122 Note: This function processes DWO files only, not DWP files. */
11125 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11126 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11127 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11129 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11130 const gdb_byte
*info_ptr
, *end_ptr
;
11132 section
.read (objfile
);
11133 info_ptr
= section
.buffer
;
11135 if (info_ptr
== NULL
)
11138 if (dwarf_read_debug
)
11140 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11141 section
.get_name (),
11142 section
.get_file_name ());
11145 end_ptr
= info_ptr
+ section
.size
;
11146 while (info_ptr
< end_ptr
)
11148 struct dwarf2_per_cu_data per_cu
;
11149 struct dwo_unit read_unit
{};
11150 struct dwo_unit
*dwo_unit
;
11152 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11154 memset (&per_cu
, 0, sizeof (per_cu
));
11155 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11156 per_cu
.is_debug_types
= 0;
11157 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11158 per_cu
.section
= §ion
;
11160 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11161 if (!reader
.dummy_p
)
11162 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11163 &dwo_file
, &read_unit
);
11164 info_ptr
+= per_cu
.length
;
11166 // If the unit could not be parsed, skip it.
11167 if (read_unit
.dwo_file
== NULL
)
11170 if (cus_htab
== NULL
)
11171 cus_htab
= allocate_dwo_unit_table ();
11173 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11174 *dwo_unit
= read_unit
;
11175 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11176 gdb_assert (slot
!= NULL
);
11179 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11180 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11182 complaint (_("debug cu entry at offset %s is duplicate to"
11183 " the entry at offset %s, signature %s"),
11184 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11185 hex_string (dwo_unit
->signature
));
11187 *slot
= (void *)dwo_unit
;
11191 /* DWP file .debug_{cu,tu}_index section format:
11192 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11196 Both index sections have the same format, and serve to map a 64-bit
11197 signature to a set of section numbers. Each section begins with a header,
11198 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11199 indexes, and a pool of 32-bit section numbers. The index sections will be
11200 aligned at 8-byte boundaries in the file.
11202 The index section header consists of:
11204 V, 32 bit version number
11206 N, 32 bit number of compilation units or type units in the index
11207 M, 32 bit number of slots in the hash table
11209 Numbers are recorded using the byte order of the application binary.
11211 The hash table begins at offset 16 in the section, and consists of an array
11212 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11213 order of the application binary). Unused slots in the hash table are 0.
11214 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11216 The parallel table begins immediately after the hash table
11217 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11218 array of 32-bit indexes (using the byte order of the application binary),
11219 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11220 table contains a 32-bit index into the pool of section numbers. For unused
11221 hash table slots, the corresponding entry in the parallel table will be 0.
11223 The pool of section numbers begins immediately following the hash table
11224 (at offset 16 + 12 * M from the beginning of the section). The pool of
11225 section numbers consists of an array of 32-bit words (using the byte order
11226 of the application binary). Each item in the array is indexed starting
11227 from 0. The hash table entry provides the index of the first section
11228 number in the set. Additional section numbers in the set follow, and the
11229 set is terminated by a 0 entry (section number 0 is not used in ELF).
11231 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11232 section must be the first entry in the set, and the .debug_abbrev.dwo must
11233 be the second entry. Other members of the set may follow in any order.
11239 DWP Version 2 combines all the .debug_info, etc. sections into one,
11240 and the entries in the index tables are now offsets into these sections.
11241 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11244 Index Section Contents:
11246 Hash Table of Signatures dwp_hash_table.hash_table
11247 Parallel Table of Indices dwp_hash_table.unit_table
11248 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11249 Table of Section Sizes dwp_hash_table.v2.sizes
11251 The index section header consists of:
11253 V, 32 bit version number
11254 L, 32 bit number of columns in the table of section offsets
11255 N, 32 bit number of compilation units or type units in the index
11256 M, 32 bit number of slots in the hash table
11258 Numbers are recorded using the byte order of the application binary.
11260 The hash table has the same format as version 1.
11261 The parallel table of indices has the same format as version 1,
11262 except that the entries are origin-1 indices into the table of sections
11263 offsets and the table of section sizes.
11265 The table of offsets begins immediately following the parallel table
11266 (at offset 16 + 12 * M from the beginning of the section). The table is
11267 a two-dimensional array of 32-bit words (using the byte order of the
11268 application binary), with L columns and N+1 rows, in row-major order.
11269 Each row in the array is indexed starting from 0. The first row provides
11270 a key to the remaining rows: each column in this row provides an identifier
11271 for a debug section, and the offsets in the same column of subsequent rows
11272 refer to that section. The section identifiers are:
11274 DW_SECT_INFO 1 .debug_info.dwo
11275 DW_SECT_TYPES 2 .debug_types.dwo
11276 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11277 DW_SECT_LINE 4 .debug_line.dwo
11278 DW_SECT_LOC 5 .debug_loc.dwo
11279 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11280 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11281 DW_SECT_MACRO 8 .debug_macro.dwo
11283 The offsets provided by the CU and TU index sections are the base offsets
11284 for the contributions made by each CU or TU to the corresponding section
11285 in the package file. Each CU and TU header contains an abbrev_offset
11286 field, used to find the abbreviations table for that CU or TU within the
11287 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11288 be interpreted as relative to the base offset given in the index section.
11289 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11290 should be interpreted as relative to the base offset for .debug_line.dwo,
11291 and offsets into other debug sections obtained from DWARF attributes should
11292 also be interpreted as relative to the corresponding base offset.
11294 The table of sizes begins immediately following the table of offsets.
11295 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11296 with L columns and N rows, in row-major order. Each row in the array is
11297 indexed starting from 1 (row 0 is shared by the two tables).
11301 Hash table lookup is handled the same in version 1 and 2:
11303 We assume that N and M will not exceed 2^32 - 1.
11304 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11306 Given a 64-bit compilation unit signature or a type signature S, an entry
11307 in the hash table is located as follows:
11309 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11310 the low-order k bits all set to 1.
11312 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11314 3) If the hash table entry at index H matches the signature, use that
11315 entry. If the hash table entry at index H is unused (all zeroes),
11316 terminate the search: the signature is not present in the table.
11318 4) Let H = (H + H') modulo M. Repeat at Step 3.
11320 Because M > N and H' and M are relatively prime, the search is guaranteed
11321 to stop at an unused slot or find the match. */
11323 /* Create a hash table to map DWO IDs to their CU/TU entry in
11324 .debug_{info,types}.dwo in DWP_FILE.
11325 Returns NULL if there isn't one.
11326 Note: This function processes DWP files only, not DWO files. */
11328 static struct dwp_hash_table
*
11329 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11330 struct dwp_file
*dwp_file
, int is_debug_types
)
11332 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11333 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11334 const gdb_byte
*index_ptr
, *index_end
;
11335 struct dwarf2_section_info
*index
;
11336 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11337 struct dwp_hash_table
*htab
;
11339 if (is_debug_types
)
11340 index
= &dwp_file
->sections
.tu_index
;
11342 index
= &dwp_file
->sections
.cu_index
;
11344 if (index
->empty ())
11346 index
->read (objfile
);
11348 index_ptr
= index
->buffer
;
11349 index_end
= index_ptr
+ index
->size
;
11351 version
= read_4_bytes (dbfd
, index_ptr
);
11354 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11358 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11360 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11363 if (version
!= 1 && version
!= 2)
11365 error (_("Dwarf Error: unsupported DWP file version (%s)"
11366 " [in module %s]"),
11367 pulongest (version
), dwp_file
->name
);
11369 if (nr_slots
!= (nr_slots
& -nr_slots
))
11371 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11372 " is not power of 2 [in module %s]"),
11373 pulongest (nr_slots
), dwp_file
->name
);
11376 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11377 htab
->version
= version
;
11378 htab
->nr_columns
= nr_columns
;
11379 htab
->nr_units
= nr_units
;
11380 htab
->nr_slots
= nr_slots
;
11381 htab
->hash_table
= index_ptr
;
11382 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11384 /* Exit early if the table is empty. */
11385 if (nr_slots
== 0 || nr_units
== 0
11386 || (version
== 2 && nr_columns
== 0))
11388 /* All must be zero. */
11389 if (nr_slots
!= 0 || nr_units
!= 0
11390 || (version
== 2 && nr_columns
!= 0))
11392 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11393 " all zero [in modules %s]"),
11401 htab
->section_pool
.v1
.indices
=
11402 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11403 /* It's harder to decide whether the section is too small in v1.
11404 V1 is deprecated anyway so we punt. */
11408 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11409 int *ids
= htab
->section_pool
.v2
.section_ids
;
11410 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11411 /* Reverse map for error checking. */
11412 int ids_seen
[DW_SECT_MAX
+ 1];
11415 if (nr_columns
< 2)
11417 error (_("Dwarf Error: bad DWP hash table, too few columns"
11418 " in section table [in module %s]"),
11421 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11423 error (_("Dwarf Error: bad DWP hash table, too many columns"
11424 " in section table [in module %s]"),
11427 memset (ids
, 255, sizeof_ids
);
11428 memset (ids_seen
, 255, sizeof (ids_seen
));
11429 for (i
= 0; i
< nr_columns
; ++i
)
11431 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11433 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11435 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11436 " in section table [in module %s]"),
11437 id
, dwp_file
->name
);
11439 if (ids_seen
[id
] != -1)
11441 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11442 " id %d in section table [in module %s]"),
11443 id
, dwp_file
->name
);
11448 /* Must have exactly one info or types section. */
11449 if (((ids_seen
[DW_SECT_INFO
] != -1)
11450 + (ids_seen
[DW_SECT_TYPES
] != -1))
11453 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11454 " DWO info/types section [in module %s]"),
11457 /* Must have an abbrev section. */
11458 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11460 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11461 " section [in module %s]"),
11464 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11465 htab
->section_pool
.v2
.sizes
=
11466 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11467 * nr_units
* nr_columns
);
11468 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11469 * nr_units
* nr_columns
))
11472 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11473 " [in module %s]"),
11481 /* Update SECTIONS with the data from SECTP.
11483 This function is like the other "locate" section routines that are
11484 passed to bfd_map_over_sections, but in this context the sections to
11485 read comes from the DWP V1 hash table, not the full ELF section table.
11487 The result is non-zero for success, or zero if an error was found. */
11490 locate_v1_virtual_dwo_sections (asection
*sectp
,
11491 struct virtual_v1_dwo_sections
*sections
)
11493 const struct dwop_section_names
*names
= &dwop_section_names
;
11495 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11497 /* There can be only one. */
11498 if (sections
->abbrev
.s
.section
!= NULL
)
11500 sections
->abbrev
.s
.section
= sectp
;
11501 sections
->abbrev
.size
= bfd_section_size (sectp
);
11503 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11504 || section_is_p (sectp
->name
, &names
->types_dwo
))
11506 /* There can be only one. */
11507 if (sections
->info_or_types
.s
.section
!= NULL
)
11509 sections
->info_or_types
.s
.section
= sectp
;
11510 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11512 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11514 /* There can be only one. */
11515 if (sections
->line
.s
.section
!= NULL
)
11517 sections
->line
.s
.section
= sectp
;
11518 sections
->line
.size
= bfd_section_size (sectp
);
11520 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11522 /* There can be only one. */
11523 if (sections
->loc
.s
.section
!= NULL
)
11525 sections
->loc
.s
.section
= sectp
;
11526 sections
->loc
.size
= bfd_section_size (sectp
);
11528 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11530 /* There can be only one. */
11531 if (sections
->macinfo
.s
.section
!= NULL
)
11533 sections
->macinfo
.s
.section
= sectp
;
11534 sections
->macinfo
.size
= bfd_section_size (sectp
);
11536 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11538 /* There can be only one. */
11539 if (sections
->macro
.s
.section
!= NULL
)
11541 sections
->macro
.s
.section
= sectp
;
11542 sections
->macro
.size
= bfd_section_size (sectp
);
11544 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11546 /* There can be only one. */
11547 if (sections
->str_offsets
.s
.section
!= NULL
)
11549 sections
->str_offsets
.s
.section
= sectp
;
11550 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11554 /* No other kind of section is valid. */
11561 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11562 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11563 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11564 This is for DWP version 1 files. */
11566 static struct dwo_unit
*
11567 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11568 struct dwp_file
*dwp_file
,
11569 uint32_t unit_index
,
11570 const char *comp_dir
,
11571 ULONGEST signature
, int is_debug_types
)
11573 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11574 const struct dwp_hash_table
*dwp_htab
=
11575 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11576 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11577 const char *kind
= is_debug_types
? "TU" : "CU";
11578 struct dwo_file
*dwo_file
;
11579 struct dwo_unit
*dwo_unit
;
11580 struct virtual_v1_dwo_sections sections
;
11581 void **dwo_file_slot
;
11584 gdb_assert (dwp_file
->version
== 1);
11586 if (dwarf_read_debug
)
11588 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11590 pulongest (unit_index
), hex_string (signature
),
11594 /* Fetch the sections of this DWO unit.
11595 Put a limit on the number of sections we look for so that bad data
11596 doesn't cause us to loop forever. */
11598 #define MAX_NR_V1_DWO_SECTIONS \
11599 (1 /* .debug_info or .debug_types */ \
11600 + 1 /* .debug_abbrev */ \
11601 + 1 /* .debug_line */ \
11602 + 1 /* .debug_loc */ \
11603 + 1 /* .debug_str_offsets */ \
11604 + 1 /* .debug_macro or .debug_macinfo */ \
11605 + 1 /* trailing zero */)
11607 memset (§ions
, 0, sizeof (sections
));
11609 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11612 uint32_t section_nr
=
11613 read_4_bytes (dbfd
,
11614 dwp_htab
->section_pool
.v1
.indices
11615 + (unit_index
+ i
) * sizeof (uint32_t));
11617 if (section_nr
== 0)
11619 if (section_nr
>= dwp_file
->num_sections
)
11621 error (_("Dwarf Error: bad DWP hash table, section number too large"
11622 " [in module %s]"),
11626 sectp
= dwp_file
->elf_sections
[section_nr
];
11627 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11629 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11630 " [in module %s]"),
11636 || sections
.info_or_types
.empty ()
11637 || sections
.abbrev
.empty ())
11639 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11640 " [in module %s]"),
11643 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11645 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11646 " [in module %s]"),
11650 /* It's easier for the rest of the code if we fake a struct dwo_file and
11651 have dwo_unit "live" in that. At least for now.
11653 The DWP file can be made up of a random collection of CUs and TUs.
11654 However, for each CU + set of TUs that came from the same original DWO
11655 file, we can combine them back into a virtual DWO file to save space
11656 (fewer struct dwo_file objects to allocate). Remember that for really
11657 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11659 std::string virtual_dwo_name
=
11660 string_printf ("virtual-dwo/%d-%d-%d-%d",
11661 sections
.abbrev
.get_id (),
11662 sections
.line
.get_id (),
11663 sections
.loc
.get_id (),
11664 sections
.str_offsets
.get_id ());
11665 /* Can we use an existing virtual DWO file? */
11666 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11667 virtual_dwo_name
.c_str (),
11669 /* Create one if necessary. */
11670 if (*dwo_file_slot
== NULL
)
11672 if (dwarf_read_debug
)
11674 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11675 virtual_dwo_name
.c_str ());
11677 dwo_file
= new struct dwo_file
;
11678 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11679 dwo_file
->comp_dir
= comp_dir
;
11680 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11681 dwo_file
->sections
.line
= sections
.line
;
11682 dwo_file
->sections
.loc
= sections
.loc
;
11683 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11684 dwo_file
->sections
.macro
= sections
.macro
;
11685 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11686 /* The "str" section is global to the entire DWP file. */
11687 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11688 /* The info or types section is assigned below to dwo_unit,
11689 there's no need to record it in dwo_file.
11690 Also, we can't simply record type sections in dwo_file because
11691 we record a pointer into the vector in dwo_unit. As we collect more
11692 types we'll grow the vector and eventually have to reallocate space
11693 for it, invalidating all copies of pointers into the previous
11695 *dwo_file_slot
= dwo_file
;
11699 if (dwarf_read_debug
)
11701 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11702 virtual_dwo_name
.c_str ());
11704 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11707 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11708 dwo_unit
->dwo_file
= dwo_file
;
11709 dwo_unit
->signature
= signature
;
11710 dwo_unit
->section
=
11711 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11712 *dwo_unit
->section
= sections
.info_or_types
;
11713 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11718 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11719 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11720 piece within that section used by a TU/CU, return a virtual section
11721 of just that piece. */
11723 static struct dwarf2_section_info
11724 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11725 struct dwarf2_section_info
*section
,
11726 bfd_size_type offset
, bfd_size_type size
)
11728 struct dwarf2_section_info result
;
11731 gdb_assert (section
!= NULL
);
11732 gdb_assert (!section
->is_virtual
);
11734 memset (&result
, 0, sizeof (result
));
11735 result
.s
.containing_section
= section
;
11736 result
.is_virtual
= true;
11741 sectp
= section
->get_bfd_section ();
11743 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11744 bounds of the real section. This is a pretty-rare event, so just
11745 flag an error (easier) instead of a warning and trying to cope. */
11747 || offset
+ size
> bfd_section_size (sectp
))
11749 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11750 " in section %s [in module %s]"),
11751 sectp
? bfd_section_name (sectp
) : "<unknown>",
11752 objfile_name (dwarf2_per_objfile
->objfile
));
11755 result
.virtual_offset
= offset
;
11756 result
.size
= size
;
11760 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11761 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11762 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11763 This is for DWP version 2 files. */
11765 static struct dwo_unit
*
11766 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11767 struct dwp_file
*dwp_file
,
11768 uint32_t unit_index
,
11769 const char *comp_dir
,
11770 ULONGEST signature
, int is_debug_types
)
11772 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11773 const struct dwp_hash_table
*dwp_htab
=
11774 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11775 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11776 const char *kind
= is_debug_types
? "TU" : "CU";
11777 struct dwo_file
*dwo_file
;
11778 struct dwo_unit
*dwo_unit
;
11779 struct virtual_v2_dwo_sections sections
;
11780 void **dwo_file_slot
;
11783 gdb_assert (dwp_file
->version
== 2);
11785 if (dwarf_read_debug
)
11787 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11789 pulongest (unit_index
), hex_string (signature
),
11793 /* Fetch the section offsets of this DWO unit. */
11795 memset (§ions
, 0, sizeof (sections
));
11797 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11799 uint32_t offset
= read_4_bytes (dbfd
,
11800 dwp_htab
->section_pool
.v2
.offsets
11801 + (((unit_index
- 1) * dwp_htab
->nr_columns
11803 * sizeof (uint32_t)));
11804 uint32_t size
= read_4_bytes (dbfd
,
11805 dwp_htab
->section_pool
.v2
.sizes
11806 + (((unit_index
- 1) * dwp_htab
->nr_columns
11808 * sizeof (uint32_t)));
11810 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11813 case DW_SECT_TYPES
:
11814 sections
.info_or_types_offset
= offset
;
11815 sections
.info_or_types_size
= size
;
11817 case DW_SECT_ABBREV
:
11818 sections
.abbrev_offset
= offset
;
11819 sections
.abbrev_size
= size
;
11822 sections
.line_offset
= offset
;
11823 sections
.line_size
= size
;
11826 sections
.loc_offset
= offset
;
11827 sections
.loc_size
= size
;
11829 case DW_SECT_STR_OFFSETS
:
11830 sections
.str_offsets_offset
= offset
;
11831 sections
.str_offsets_size
= size
;
11833 case DW_SECT_MACINFO
:
11834 sections
.macinfo_offset
= offset
;
11835 sections
.macinfo_size
= size
;
11837 case DW_SECT_MACRO
:
11838 sections
.macro_offset
= offset
;
11839 sections
.macro_size
= size
;
11844 /* It's easier for the rest of the code if we fake a struct dwo_file and
11845 have dwo_unit "live" in that. At least for now.
11847 The DWP file can be made up of a random collection of CUs and TUs.
11848 However, for each CU + set of TUs that came from the same original DWO
11849 file, we can combine them back into a virtual DWO file to save space
11850 (fewer struct dwo_file objects to allocate). Remember that for really
11851 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11853 std::string virtual_dwo_name
=
11854 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11855 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11856 (long) (sections
.line_size
? sections
.line_offset
: 0),
11857 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11858 (long) (sections
.str_offsets_size
11859 ? sections
.str_offsets_offset
: 0));
11860 /* Can we use an existing virtual DWO file? */
11861 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11862 virtual_dwo_name
.c_str (),
11864 /* Create one if necessary. */
11865 if (*dwo_file_slot
== NULL
)
11867 if (dwarf_read_debug
)
11869 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11870 virtual_dwo_name
.c_str ());
11872 dwo_file
= new struct dwo_file
;
11873 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11874 dwo_file
->comp_dir
= comp_dir
;
11875 dwo_file
->sections
.abbrev
=
11876 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11877 sections
.abbrev_offset
, sections
.abbrev_size
);
11878 dwo_file
->sections
.line
=
11879 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
11880 sections
.line_offset
, sections
.line_size
);
11881 dwo_file
->sections
.loc
=
11882 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
11883 sections
.loc_offset
, sections
.loc_size
);
11884 dwo_file
->sections
.macinfo
=
11885 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
11886 sections
.macinfo_offset
, sections
.macinfo_size
);
11887 dwo_file
->sections
.macro
=
11888 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
11889 sections
.macro_offset
, sections
.macro_size
);
11890 dwo_file
->sections
.str_offsets
=
11891 create_dwp_v2_section (dwarf2_per_objfile
,
11892 &dwp_file
->sections
.str_offsets
,
11893 sections
.str_offsets_offset
,
11894 sections
.str_offsets_size
);
11895 /* The "str" section is global to the entire DWP file. */
11896 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11897 /* The info or types section is assigned below to dwo_unit,
11898 there's no need to record it in dwo_file.
11899 Also, we can't simply record type sections in dwo_file because
11900 we record a pointer into the vector in dwo_unit. As we collect more
11901 types we'll grow the vector and eventually have to reallocate space
11902 for it, invalidating all copies of pointers into the previous
11904 *dwo_file_slot
= dwo_file
;
11908 if (dwarf_read_debug
)
11910 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11911 virtual_dwo_name
.c_str ());
11913 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11916 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11917 dwo_unit
->dwo_file
= dwo_file
;
11918 dwo_unit
->signature
= signature
;
11919 dwo_unit
->section
=
11920 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11921 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
11923 ? &dwp_file
->sections
.types
11924 : &dwp_file
->sections
.info
,
11925 sections
.info_or_types_offset
,
11926 sections
.info_or_types_size
);
11927 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11932 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
11933 Returns NULL if the signature isn't found. */
11935 static struct dwo_unit
*
11936 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11937 struct dwp_file
*dwp_file
, const char *comp_dir
,
11938 ULONGEST signature
, int is_debug_types
)
11940 const struct dwp_hash_table
*dwp_htab
=
11941 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11942 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11943 uint32_t mask
= dwp_htab
->nr_slots
- 1;
11944 uint32_t hash
= signature
& mask
;
11945 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
11948 struct dwo_unit find_dwo_cu
;
11950 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
11951 find_dwo_cu
.signature
= signature
;
11952 slot
= htab_find_slot (is_debug_types
11953 ? dwp_file
->loaded_tus
.get ()
11954 : dwp_file
->loaded_cus
.get (),
11955 &find_dwo_cu
, INSERT
);
11958 return (struct dwo_unit
*) *slot
;
11960 /* Use a for loop so that we don't loop forever on bad debug info. */
11961 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
11963 ULONGEST signature_in_table
;
11965 signature_in_table
=
11966 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
11967 if (signature_in_table
== signature
)
11969 uint32_t unit_index
=
11970 read_4_bytes (dbfd
,
11971 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
11973 if (dwp_file
->version
== 1)
11975 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
11976 dwp_file
, unit_index
,
11977 comp_dir
, signature
,
11982 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
11983 dwp_file
, unit_index
,
11984 comp_dir
, signature
,
11987 return (struct dwo_unit
*) *slot
;
11989 if (signature_in_table
== 0)
11991 hash
= (hash
+ hash2
) & mask
;
11994 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
11995 " [in module %s]"),
11999 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12000 Open the file specified by FILE_NAME and hand it off to BFD for
12001 preliminary analysis. Return a newly initialized bfd *, which
12002 includes a canonicalized copy of FILE_NAME.
12003 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12004 SEARCH_CWD is true if the current directory is to be searched.
12005 It will be searched before debug-file-directory.
12006 If successful, the file is added to the bfd include table of the
12007 objfile's bfd (see gdb_bfd_record_inclusion).
12008 If unable to find/open the file, return NULL.
12009 NOTE: This function is derived from symfile_bfd_open. */
12011 static gdb_bfd_ref_ptr
12012 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12013 const char *file_name
, int is_dwp
, int search_cwd
)
12016 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12017 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12018 to debug_file_directory. */
12019 const char *search_path
;
12020 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12022 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12025 if (*debug_file_directory
!= '\0')
12027 search_path_holder
.reset (concat (".", dirname_separator_string
,
12028 debug_file_directory
,
12030 search_path
= search_path_holder
.get ();
12036 search_path
= debug_file_directory
;
12038 openp_flags flags
= OPF_RETURN_REALPATH
;
12040 flags
|= OPF_SEARCH_IN_PATH
;
12042 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12043 desc
= openp (search_path
, flags
, file_name
,
12044 O_RDONLY
| O_BINARY
, &absolute_name
);
12048 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12050 if (sym_bfd
== NULL
)
12052 bfd_set_cacheable (sym_bfd
.get (), 1);
12054 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12057 /* Success. Record the bfd as having been included by the objfile's bfd.
12058 This is important because things like demangled_names_hash lives in the
12059 objfile's per_bfd space and may have references to things like symbol
12060 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12061 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12066 /* Try to open DWO file FILE_NAME.
12067 COMP_DIR is the DW_AT_comp_dir attribute.
12068 The result is the bfd handle of the file.
12069 If there is a problem finding or opening the file, return NULL.
12070 Upon success, the canonicalized path of the file is stored in the bfd,
12071 same as symfile_bfd_open. */
12073 static gdb_bfd_ref_ptr
12074 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12075 const char *file_name
, const char *comp_dir
)
12077 if (IS_ABSOLUTE_PATH (file_name
))
12078 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12079 0 /*is_dwp*/, 0 /*search_cwd*/);
12081 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12083 if (comp_dir
!= NULL
)
12085 gdb::unique_xmalloc_ptr
<char> path_to_try
12086 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12088 /* NOTE: If comp_dir is a relative path, this will also try the
12089 search path, which seems useful. */
12090 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12091 path_to_try
.get (),
12093 1 /*search_cwd*/));
12098 /* That didn't work, try debug-file-directory, which, despite its name,
12099 is a list of paths. */
12101 if (*debug_file_directory
== '\0')
12104 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12105 0 /*is_dwp*/, 1 /*search_cwd*/);
12108 /* This function is mapped across the sections and remembers the offset and
12109 size of each of the DWO debugging sections we are interested in. */
12112 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12114 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12115 const struct dwop_section_names
*names
= &dwop_section_names
;
12117 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12119 dwo_sections
->abbrev
.s
.section
= sectp
;
12120 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12122 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12124 dwo_sections
->info
.s
.section
= sectp
;
12125 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12127 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12129 dwo_sections
->line
.s
.section
= sectp
;
12130 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12132 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12134 dwo_sections
->loc
.s
.section
= sectp
;
12135 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12137 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12139 dwo_sections
->loclists
.s
.section
= sectp
;
12140 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12142 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12144 dwo_sections
->macinfo
.s
.section
= sectp
;
12145 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12147 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12149 dwo_sections
->macro
.s
.section
= sectp
;
12150 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12152 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12154 dwo_sections
->str
.s
.section
= sectp
;
12155 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12157 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12159 dwo_sections
->str_offsets
.s
.section
= sectp
;
12160 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12162 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12164 struct dwarf2_section_info type_section
;
12166 memset (&type_section
, 0, sizeof (type_section
));
12167 type_section
.s
.section
= sectp
;
12168 type_section
.size
= bfd_section_size (sectp
);
12169 dwo_sections
->types
.push_back (type_section
);
12173 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12174 by PER_CU. This is for the non-DWP case.
12175 The result is NULL if DWO_NAME can't be found. */
12177 static struct dwo_file
*
12178 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12179 const char *dwo_name
, const char *comp_dir
)
12181 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12183 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12186 if (dwarf_read_debug
)
12187 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12191 dwo_file_up
dwo_file (new struct dwo_file
);
12192 dwo_file
->dwo_name
= dwo_name
;
12193 dwo_file
->comp_dir
= comp_dir
;
12194 dwo_file
->dbfd
= std::move (dbfd
);
12196 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12197 &dwo_file
->sections
);
12199 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12200 dwo_file
->sections
.info
, dwo_file
->cus
);
12202 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12203 dwo_file
->sections
.types
, dwo_file
->tus
);
12205 if (dwarf_read_debug
)
12206 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12208 return dwo_file
.release ();
12211 /* This function is mapped across the sections and remembers the offset and
12212 size of each of the DWP debugging sections common to version 1 and 2 that
12213 we are interested in. */
12216 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12217 void *dwp_file_ptr
)
12219 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12220 const struct dwop_section_names
*names
= &dwop_section_names
;
12221 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12223 /* Record the ELF section number for later lookup: this is what the
12224 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12225 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12226 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12228 /* Look for specific sections that we need. */
12229 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12231 dwp_file
->sections
.str
.s
.section
= sectp
;
12232 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12234 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12236 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12237 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12239 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12241 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12242 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12246 /* This function is mapped across the sections and remembers the offset and
12247 size of each of the DWP version 2 debugging sections that we are interested
12248 in. This is split into a separate function because we don't know if we
12249 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12252 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12254 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12255 const struct dwop_section_names
*names
= &dwop_section_names
;
12256 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12258 /* Record the ELF section number for later lookup: this is what the
12259 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12260 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12261 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12263 /* Look for specific sections that we need. */
12264 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12266 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12267 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12269 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12271 dwp_file
->sections
.info
.s
.section
= sectp
;
12272 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12274 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12276 dwp_file
->sections
.line
.s
.section
= sectp
;
12277 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12279 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12281 dwp_file
->sections
.loc
.s
.section
= sectp
;
12282 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12284 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12286 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12287 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12289 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12291 dwp_file
->sections
.macro
.s
.section
= sectp
;
12292 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12294 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12296 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12297 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12299 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12301 dwp_file
->sections
.types
.s
.section
= sectp
;
12302 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12306 /* Hash function for dwp_file loaded CUs/TUs. */
12309 hash_dwp_loaded_cutus (const void *item
)
12311 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12313 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12314 return dwo_unit
->signature
;
12317 /* Equality function for dwp_file loaded CUs/TUs. */
12320 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12322 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12323 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12325 return dua
->signature
== dub
->signature
;
12328 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12331 allocate_dwp_loaded_cutus_table ()
12333 return htab_up (htab_create_alloc (3,
12334 hash_dwp_loaded_cutus
,
12335 eq_dwp_loaded_cutus
,
12336 NULL
, xcalloc
, xfree
));
12339 /* Try to open DWP file FILE_NAME.
12340 The result is the bfd handle of the file.
12341 If there is a problem finding or opening the file, return NULL.
12342 Upon success, the canonicalized path of the file is stored in the bfd,
12343 same as symfile_bfd_open. */
12345 static gdb_bfd_ref_ptr
12346 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12347 const char *file_name
)
12349 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12351 1 /*search_cwd*/));
12355 /* Work around upstream bug 15652.
12356 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12357 [Whether that's a "bug" is debatable, but it is getting in our way.]
12358 We have no real idea where the dwp file is, because gdb's realpath-ing
12359 of the executable's path may have discarded the needed info.
12360 [IWBN if the dwp file name was recorded in the executable, akin to
12361 .gnu_debuglink, but that doesn't exist yet.]
12362 Strip the directory from FILE_NAME and search again. */
12363 if (*debug_file_directory
!= '\0')
12365 /* Don't implicitly search the current directory here.
12366 If the user wants to search "." to handle this case,
12367 it must be added to debug-file-directory. */
12368 return try_open_dwop_file (dwarf2_per_objfile
,
12369 lbasename (file_name
), 1 /*is_dwp*/,
12376 /* Initialize the use of the DWP file for the current objfile.
12377 By convention the name of the DWP file is ${objfile}.dwp.
12378 The result is NULL if it can't be found. */
12380 static std::unique_ptr
<struct dwp_file
>
12381 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12383 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12385 /* Try to find first .dwp for the binary file before any symbolic links
12388 /* If the objfile is a debug file, find the name of the real binary
12389 file and get the name of dwp file from there. */
12390 std::string dwp_name
;
12391 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12393 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12394 const char *backlink_basename
= lbasename (backlink
->original_name
);
12396 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12399 dwp_name
= objfile
->original_name
;
12401 dwp_name
+= ".dwp";
12403 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12405 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12407 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12408 dwp_name
= objfile_name (objfile
);
12409 dwp_name
+= ".dwp";
12410 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12415 if (dwarf_read_debug
)
12416 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12417 return std::unique_ptr
<dwp_file
> ();
12420 const char *name
= bfd_get_filename (dbfd
.get ());
12421 std::unique_ptr
<struct dwp_file
> dwp_file
12422 (new struct dwp_file (name
, std::move (dbfd
)));
12424 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12425 dwp_file
->elf_sections
=
12426 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12427 dwp_file
->num_sections
, asection
*);
12429 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12430 dwarf2_locate_common_dwp_sections
,
12433 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12436 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12439 /* The DWP file version is stored in the hash table. Oh well. */
12440 if (dwp_file
->cus
&& dwp_file
->tus
12441 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12443 /* Technically speaking, we should try to limp along, but this is
12444 pretty bizarre. We use pulongest here because that's the established
12445 portability solution (e.g, we cannot use %u for uint32_t). */
12446 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12447 " TU version %s [in DWP file %s]"),
12448 pulongest (dwp_file
->cus
->version
),
12449 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12453 dwp_file
->version
= dwp_file
->cus
->version
;
12454 else if (dwp_file
->tus
)
12455 dwp_file
->version
= dwp_file
->tus
->version
;
12457 dwp_file
->version
= 2;
12459 if (dwp_file
->version
== 2)
12460 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12461 dwarf2_locate_v2_dwp_sections
,
12464 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12465 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12467 if (dwarf_read_debug
)
12469 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12470 fprintf_unfiltered (gdb_stdlog
,
12471 " %s CUs, %s TUs\n",
12472 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12473 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12479 /* Wrapper around open_and_init_dwp_file, only open it once. */
12481 static struct dwp_file
*
12482 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12484 if (! dwarf2_per_objfile
->dwp_checked
)
12486 dwarf2_per_objfile
->dwp_file
12487 = open_and_init_dwp_file (dwarf2_per_objfile
);
12488 dwarf2_per_objfile
->dwp_checked
= 1;
12490 return dwarf2_per_objfile
->dwp_file
.get ();
12493 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12494 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12495 or in the DWP file for the objfile, referenced by THIS_UNIT.
12496 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12497 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12499 This is called, for example, when wanting to read a variable with a
12500 complex location. Therefore we don't want to do file i/o for every call.
12501 Therefore we don't want to look for a DWO file on every call.
12502 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12503 then we check if we've already seen DWO_NAME, and only THEN do we check
12506 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12507 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12509 static struct dwo_unit
*
12510 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12511 const char *dwo_name
, const char *comp_dir
,
12512 ULONGEST signature
, int is_debug_types
)
12514 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12515 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12516 const char *kind
= is_debug_types
? "TU" : "CU";
12517 void **dwo_file_slot
;
12518 struct dwo_file
*dwo_file
;
12519 struct dwp_file
*dwp_file
;
12521 /* First see if there's a DWP file.
12522 If we have a DWP file but didn't find the DWO inside it, don't
12523 look for the original DWO file. It makes gdb behave differently
12524 depending on whether one is debugging in the build tree. */
12526 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12527 if (dwp_file
!= NULL
)
12529 const struct dwp_hash_table
*dwp_htab
=
12530 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12532 if (dwp_htab
!= NULL
)
12534 struct dwo_unit
*dwo_cutu
=
12535 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12536 signature
, is_debug_types
);
12538 if (dwo_cutu
!= NULL
)
12540 if (dwarf_read_debug
)
12542 fprintf_unfiltered (gdb_stdlog
,
12543 "Virtual DWO %s %s found: @%s\n",
12544 kind
, hex_string (signature
),
12545 host_address_to_string (dwo_cutu
));
12553 /* No DWP file, look for the DWO file. */
12555 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12556 dwo_name
, comp_dir
);
12557 if (*dwo_file_slot
== NULL
)
12559 /* Read in the file and build a table of the CUs/TUs it contains. */
12560 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12562 /* NOTE: This will be NULL if unable to open the file. */
12563 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12565 if (dwo_file
!= NULL
)
12567 struct dwo_unit
*dwo_cutu
= NULL
;
12569 if (is_debug_types
&& dwo_file
->tus
)
12571 struct dwo_unit find_dwo_cutu
;
12573 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12574 find_dwo_cutu
.signature
= signature
;
12576 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12579 else if (!is_debug_types
&& dwo_file
->cus
)
12581 struct dwo_unit find_dwo_cutu
;
12583 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12584 find_dwo_cutu
.signature
= signature
;
12585 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12589 if (dwo_cutu
!= NULL
)
12591 if (dwarf_read_debug
)
12593 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12594 kind
, dwo_name
, hex_string (signature
),
12595 host_address_to_string (dwo_cutu
));
12602 /* We didn't find it. This could mean a dwo_id mismatch, or
12603 someone deleted the DWO/DWP file, or the search path isn't set up
12604 correctly to find the file. */
12606 if (dwarf_read_debug
)
12608 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12609 kind
, dwo_name
, hex_string (signature
));
12612 /* This is a warning and not a complaint because it can be caused by
12613 pilot error (e.g., user accidentally deleting the DWO). */
12615 /* Print the name of the DWP file if we looked there, helps the user
12616 better diagnose the problem. */
12617 std::string dwp_text
;
12619 if (dwp_file
!= NULL
)
12620 dwp_text
= string_printf (" [in DWP file %s]",
12621 lbasename (dwp_file
->name
));
12623 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12624 " [in module %s]"),
12625 kind
, dwo_name
, hex_string (signature
),
12627 this_unit
->is_debug_types
? "TU" : "CU",
12628 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12633 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12634 See lookup_dwo_cutu_unit for details. */
12636 static struct dwo_unit
*
12637 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12638 const char *dwo_name
, const char *comp_dir
,
12639 ULONGEST signature
)
12641 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12644 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12645 See lookup_dwo_cutu_unit for details. */
12647 static struct dwo_unit
*
12648 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12649 const char *dwo_name
, const char *comp_dir
)
12651 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12654 /* Traversal function for queue_and_load_all_dwo_tus. */
12657 queue_and_load_dwo_tu (void **slot
, void *info
)
12659 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12660 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12661 ULONGEST signature
= dwo_unit
->signature
;
12662 struct signatured_type
*sig_type
=
12663 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12665 if (sig_type
!= NULL
)
12667 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12669 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12670 a real dependency of PER_CU on SIG_TYPE. That is detected later
12671 while processing PER_CU. */
12672 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12673 load_full_type_unit (sig_cu
);
12674 per_cu
->imported_symtabs_push (sig_cu
);
12680 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12681 The DWO may have the only definition of the type, though it may not be
12682 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12683 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12686 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12688 struct dwo_unit
*dwo_unit
;
12689 struct dwo_file
*dwo_file
;
12691 gdb_assert (!per_cu
->is_debug_types
);
12692 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12693 gdb_assert (per_cu
->cu
!= NULL
);
12695 dwo_unit
= per_cu
->cu
->dwo_unit
;
12696 gdb_assert (dwo_unit
!= NULL
);
12698 dwo_file
= dwo_unit
->dwo_file
;
12699 if (dwo_file
->tus
!= NULL
)
12700 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12704 /* Read in various DIEs. */
12706 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12707 Inherit only the children of the DW_AT_abstract_origin DIE not being
12708 already referenced by DW_AT_abstract_origin from the children of the
12712 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12714 struct die_info
*child_die
;
12715 sect_offset
*offsetp
;
12716 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12717 struct die_info
*origin_die
;
12718 /* Iterator of the ORIGIN_DIE children. */
12719 struct die_info
*origin_child_die
;
12720 struct attribute
*attr
;
12721 struct dwarf2_cu
*origin_cu
;
12722 struct pending
**origin_previous_list_in_scope
;
12724 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12728 /* Note that following die references may follow to a die in a
12732 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12734 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12736 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12737 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12739 if (die
->tag
!= origin_die
->tag
12740 && !(die
->tag
== DW_TAG_inlined_subroutine
12741 && origin_die
->tag
== DW_TAG_subprogram
))
12742 complaint (_("DIE %s and its abstract origin %s have different tags"),
12743 sect_offset_str (die
->sect_off
),
12744 sect_offset_str (origin_die
->sect_off
));
12746 std::vector
<sect_offset
> offsets
;
12748 for (child_die
= die
->child
;
12749 child_die
&& child_die
->tag
;
12750 child_die
= child_die
->sibling
)
12752 struct die_info
*child_origin_die
;
12753 struct dwarf2_cu
*child_origin_cu
;
12755 /* We are trying to process concrete instance entries:
12756 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12757 it's not relevant to our analysis here. i.e. detecting DIEs that are
12758 present in the abstract instance but not referenced in the concrete
12760 if (child_die
->tag
== DW_TAG_call_site
12761 || child_die
->tag
== DW_TAG_GNU_call_site
)
12764 /* For each CHILD_DIE, find the corresponding child of
12765 ORIGIN_DIE. If there is more than one layer of
12766 DW_AT_abstract_origin, follow them all; there shouldn't be,
12767 but GCC versions at least through 4.4 generate this (GCC PR
12769 child_origin_die
= child_die
;
12770 child_origin_cu
= cu
;
12773 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12777 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12781 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12782 counterpart may exist. */
12783 if (child_origin_die
!= child_die
)
12785 if (child_die
->tag
!= child_origin_die
->tag
12786 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12787 && child_origin_die
->tag
== DW_TAG_subprogram
))
12788 complaint (_("Child DIE %s and its abstract origin %s have "
12790 sect_offset_str (child_die
->sect_off
),
12791 sect_offset_str (child_origin_die
->sect_off
));
12792 if (child_origin_die
->parent
!= origin_die
)
12793 complaint (_("Child DIE %s and its abstract origin %s have "
12794 "different parents"),
12795 sect_offset_str (child_die
->sect_off
),
12796 sect_offset_str (child_origin_die
->sect_off
));
12798 offsets
.push_back (child_origin_die
->sect_off
);
12801 std::sort (offsets
.begin (), offsets
.end ());
12802 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12803 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12804 if (offsetp
[-1] == *offsetp
)
12805 complaint (_("Multiple children of DIE %s refer "
12806 "to DIE %s as their abstract origin"),
12807 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12809 offsetp
= offsets
.data ();
12810 origin_child_die
= origin_die
->child
;
12811 while (origin_child_die
&& origin_child_die
->tag
)
12813 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12814 while (offsetp
< offsets_end
12815 && *offsetp
< origin_child_die
->sect_off
)
12817 if (offsetp
>= offsets_end
12818 || *offsetp
> origin_child_die
->sect_off
)
12820 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12821 Check whether we're already processing ORIGIN_CHILD_DIE.
12822 This can happen with mutually referenced abstract_origins.
12824 if (!origin_child_die
->in_process
)
12825 process_die (origin_child_die
, origin_cu
);
12827 origin_child_die
= origin_child_die
->sibling
;
12829 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12831 if (cu
!= origin_cu
)
12832 compute_delayed_physnames (origin_cu
);
12836 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12838 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12839 struct gdbarch
*gdbarch
= objfile
->arch ();
12840 struct context_stack
*newobj
;
12843 struct die_info
*child_die
;
12844 struct attribute
*attr
, *call_line
, *call_file
;
12846 CORE_ADDR baseaddr
;
12847 struct block
*block
;
12848 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12849 std::vector
<struct symbol
*> template_args
;
12850 struct template_symbol
*templ_func
= NULL
;
12854 /* If we do not have call site information, we can't show the
12855 caller of this inlined function. That's too confusing, so
12856 only use the scope for local variables. */
12857 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12858 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12859 if (call_line
== NULL
|| call_file
== NULL
)
12861 read_lexical_block_scope (die
, cu
);
12866 baseaddr
= objfile
->text_section_offset ();
12868 name
= dwarf2_name (die
, cu
);
12870 /* Ignore functions with missing or empty names. These are actually
12871 illegal according to the DWARF standard. */
12874 complaint (_("missing name for subprogram DIE at %s"),
12875 sect_offset_str (die
->sect_off
));
12879 /* Ignore functions with missing or invalid low and high pc attributes. */
12880 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12881 <= PC_BOUNDS_INVALID
)
12883 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12884 if (!attr
|| !DW_UNSND (attr
))
12885 complaint (_("cannot get low and high bounds "
12886 "for subprogram DIE at %s"),
12887 sect_offset_str (die
->sect_off
));
12891 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12892 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12894 /* If we have any template arguments, then we must allocate a
12895 different sort of symbol. */
12896 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
12898 if (child_die
->tag
== DW_TAG_template_type_param
12899 || child_die
->tag
== DW_TAG_template_value_param
)
12901 templ_func
= allocate_template_symbol (objfile
);
12902 templ_func
->subclass
= SYMBOL_TEMPLATE
;
12907 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
12908 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
12909 (struct symbol
*) templ_func
);
12911 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
12912 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
12915 /* If there is a location expression for DW_AT_frame_base, record
12917 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
12918 if (attr
!= nullptr)
12919 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
12921 /* If there is a location for the static link, record it. */
12922 newobj
->static_link
= NULL
;
12923 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
12924 if (attr
!= nullptr)
12926 newobj
->static_link
12927 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
12928 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
12929 cu
->per_cu
->addr_type ());
12932 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
12934 if (die
->child
!= NULL
)
12936 child_die
= die
->child
;
12937 while (child_die
&& child_die
->tag
)
12939 if (child_die
->tag
== DW_TAG_template_type_param
12940 || child_die
->tag
== DW_TAG_template_value_param
)
12942 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12945 template_args
.push_back (arg
);
12948 process_die (child_die
, cu
);
12949 child_die
= child_die
->sibling
;
12953 inherit_abstract_dies (die
, cu
);
12955 /* If we have a DW_AT_specification, we might need to import using
12956 directives from the context of the specification DIE. See the
12957 comment in determine_prefix. */
12958 if (cu
->language
== language_cplus
12959 && dwarf2_attr (die
, DW_AT_specification
, cu
))
12961 struct dwarf2_cu
*spec_cu
= cu
;
12962 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
12966 child_die
= spec_die
->child
;
12967 while (child_die
&& child_die
->tag
)
12969 if (child_die
->tag
== DW_TAG_imported_module
)
12970 process_die (child_die
, spec_cu
);
12971 child_die
= child_die
->sibling
;
12974 /* In some cases, GCC generates specification DIEs that
12975 themselves contain DW_AT_specification attributes. */
12976 spec_die
= die_specification (spec_die
, &spec_cu
);
12980 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
12981 /* Make a block for the local symbols within. */
12982 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
12983 cstk
.static_link
, lowpc
, highpc
);
12985 /* For C++, set the block's scope. */
12986 if ((cu
->language
== language_cplus
12987 || cu
->language
== language_fortran
12988 || cu
->language
== language_d
12989 || cu
->language
== language_rust
)
12990 && cu
->processing_has_namespace_info
)
12991 block_set_scope (block
, determine_prefix (die
, cu
),
12992 &objfile
->objfile_obstack
);
12994 /* If we have address ranges, record them. */
12995 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
12997 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
12999 /* Attach template arguments to function. */
13000 if (!template_args
.empty ())
13002 gdb_assert (templ_func
!= NULL
);
13004 templ_func
->n_template_arguments
= template_args
.size ();
13005 templ_func
->template_arguments
13006 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13007 templ_func
->n_template_arguments
);
13008 memcpy (templ_func
->template_arguments
,
13009 template_args
.data (),
13010 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13012 /* Make sure that the symtab is set on the new symbols. Even
13013 though they don't appear in this symtab directly, other parts
13014 of gdb assume that symbols do, and this is reasonably
13016 for (symbol
*sym
: template_args
)
13017 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13020 /* In C++, we can have functions nested inside functions (e.g., when
13021 a function declares a class that has methods). This means that
13022 when we finish processing a function scope, we may need to go
13023 back to building a containing block's symbol lists. */
13024 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13025 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13027 /* If we've finished processing a top-level function, subsequent
13028 symbols go in the file symbol list. */
13029 if (cu
->get_builder ()->outermost_context_p ())
13030 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13033 /* Process all the DIES contained within a lexical block scope. Start
13034 a new scope, process the dies, and then close the scope. */
13037 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13039 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13040 struct gdbarch
*gdbarch
= objfile
->arch ();
13041 CORE_ADDR lowpc
, highpc
;
13042 struct die_info
*child_die
;
13043 CORE_ADDR baseaddr
;
13045 baseaddr
= objfile
->text_section_offset ();
13047 /* Ignore blocks with missing or invalid low and high pc attributes. */
13048 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13049 as multiple lexical blocks? Handling children in a sane way would
13050 be nasty. Might be easier to properly extend generic blocks to
13051 describe ranges. */
13052 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13054 case PC_BOUNDS_NOT_PRESENT
:
13055 /* DW_TAG_lexical_block has no attributes, process its children as if
13056 there was no wrapping by that DW_TAG_lexical_block.
13057 GCC does no longer produces such DWARF since GCC r224161. */
13058 for (child_die
= die
->child
;
13059 child_die
!= NULL
&& child_die
->tag
;
13060 child_die
= child_die
->sibling
)
13061 process_die (child_die
, cu
);
13063 case PC_BOUNDS_INVALID
:
13066 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13067 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13069 cu
->get_builder ()->push_context (0, lowpc
);
13070 if (die
->child
!= NULL
)
13072 child_die
= die
->child
;
13073 while (child_die
&& child_die
->tag
)
13075 process_die (child_die
, cu
);
13076 child_die
= child_die
->sibling
;
13079 inherit_abstract_dies (die
, cu
);
13080 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13082 if (*cu
->get_builder ()->get_local_symbols () != NULL
13083 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13085 struct block
*block
13086 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13087 cstk
.start_addr
, highpc
);
13089 /* Note that recording ranges after traversing children, as we
13090 do here, means that recording a parent's ranges entails
13091 walking across all its children's ranges as they appear in
13092 the address map, which is quadratic behavior.
13094 It would be nicer to record the parent's ranges before
13095 traversing its children, simply overriding whatever you find
13096 there. But since we don't even decide whether to create a
13097 block until after we've traversed its children, that's hard
13099 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13101 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13102 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13105 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13108 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13110 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13111 struct gdbarch
*gdbarch
= objfile
->arch ();
13112 CORE_ADDR pc
, baseaddr
;
13113 struct attribute
*attr
;
13114 struct call_site
*call_site
, call_site_local
;
13117 struct die_info
*child_die
;
13119 baseaddr
= objfile
->text_section_offset ();
13121 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13124 /* This was a pre-DWARF-5 GNU extension alias
13125 for DW_AT_call_return_pc. */
13126 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13130 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13131 "DIE %s [in module %s]"),
13132 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13135 pc
= attr
->value_as_address () + baseaddr
;
13136 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13138 if (cu
->call_site_htab
== NULL
)
13139 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13140 NULL
, &objfile
->objfile_obstack
,
13141 hashtab_obstack_allocate
, NULL
);
13142 call_site_local
.pc
= pc
;
13143 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13146 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13147 "DIE %s [in module %s]"),
13148 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13149 objfile_name (objfile
));
13153 /* Count parameters at the caller. */
13156 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13157 child_die
= child_die
->sibling
)
13159 if (child_die
->tag
!= DW_TAG_call_site_parameter
13160 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13162 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13163 "DW_TAG_call_site child DIE %s [in module %s]"),
13164 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13165 objfile_name (objfile
));
13173 = ((struct call_site
*)
13174 obstack_alloc (&objfile
->objfile_obstack
,
13175 sizeof (*call_site
)
13176 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13178 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13179 call_site
->pc
= pc
;
13181 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13182 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13184 struct die_info
*func_die
;
13186 /* Skip also over DW_TAG_inlined_subroutine. */
13187 for (func_die
= die
->parent
;
13188 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13189 && func_die
->tag
!= DW_TAG_subroutine_type
;
13190 func_die
= func_die
->parent
);
13192 /* DW_AT_call_all_calls is a superset
13193 of DW_AT_call_all_tail_calls. */
13195 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13196 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13197 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13198 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13200 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13201 not complete. But keep CALL_SITE for look ups via call_site_htab,
13202 both the initial caller containing the real return address PC and
13203 the final callee containing the current PC of a chain of tail
13204 calls do not need to have the tail call list complete. But any
13205 function candidate for a virtual tail call frame searched via
13206 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13207 determined unambiguously. */
13211 struct type
*func_type
= NULL
;
13214 func_type
= get_die_type (func_die
, cu
);
13215 if (func_type
!= NULL
)
13217 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13219 /* Enlist this call site to the function. */
13220 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13221 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13224 complaint (_("Cannot find function owning DW_TAG_call_site "
13225 "DIE %s [in module %s]"),
13226 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13230 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13232 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13234 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13237 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13238 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13240 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13241 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13242 /* Keep NULL DWARF_BLOCK. */;
13243 else if (attr
->form_is_block ())
13245 struct dwarf2_locexpr_baton
*dlbaton
;
13247 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13248 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13249 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13250 dlbaton
->per_cu
= cu
->per_cu
;
13252 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13254 else if (attr
->form_is_ref ())
13256 struct dwarf2_cu
*target_cu
= cu
;
13257 struct die_info
*target_die
;
13259 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13260 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13261 if (die_is_declaration (target_die
, target_cu
))
13263 const char *target_physname
;
13265 /* Prefer the mangled name; otherwise compute the demangled one. */
13266 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13267 if (target_physname
== NULL
)
13268 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13269 if (target_physname
== NULL
)
13270 complaint (_("DW_AT_call_target target DIE has invalid "
13271 "physname, for referencing DIE %s [in module %s]"),
13272 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13274 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13280 /* DW_AT_entry_pc should be preferred. */
13281 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13282 <= PC_BOUNDS_INVALID
)
13283 complaint (_("DW_AT_call_target target DIE has invalid "
13284 "low pc, for referencing DIE %s [in module %s]"),
13285 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13288 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13289 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13294 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13295 "block nor reference, for DIE %s [in module %s]"),
13296 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13298 call_site
->per_cu
= cu
->per_cu
;
13300 for (child_die
= die
->child
;
13301 child_die
&& child_die
->tag
;
13302 child_die
= child_die
->sibling
)
13304 struct call_site_parameter
*parameter
;
13305 struct attribute
*loc
, *origin
;
13307 if (child_die
->tag
!= DW_TAG_call_site_parameter
13308 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13310 /* Already printed the complaint above. */
13314 gdb_assert (call_site
->parameter_count
< nparams
);
13315 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13317 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13318 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13319 register is contained in DW_AT_call_value. */
13321 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13322 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13323 if (origin
== NULL
)
13325 /* This was a pre-DWARF-5 GNU extension alias
13326 for DW_AT_call_parameter. */
13327 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13329 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13331 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13333 sect_offset sect_off
= origin
->get_ref_die_offset ();
13334 if (!cu
->header
.offset_in_cu_p (sect_off
))
13336 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13337 binding can be done only inside one CU. Such referenced DIE
13338 therefore cannot be even moved to DW_TAG_partial_unit. */
13339 complaint (_("DW_AT_call_parameter offset is not in CU for "
13340 "DW_TAG_call_site child DIE %s [in module %s]"),
13341 sect_offset_str (child_die
->sect_off
),
13342 objfile_name (objfile
));
13345 parameter
->u
.param_cu_off
13346 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13348 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13350 complaint (_("No DW_FORM_block* DW_AT_location for "
13351 "DW_TAG_call_site child DIE %s [in module %s]"),
13352 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13357 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13358 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13359 if (parameter
->u
.dwarf_reg
!= -1)
13360 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13361 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13362 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13363 ¶meter
->u
.fb_offset
))
13364 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13367 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13368 "for DW_FORM_block* DW_AT_location is supported for "
13369 "DW_TAG_call_site child DIE %s "
13371 sect_offset_str (child_die
->sect_off
),
13372 objfile_name (objfile
));
13377 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13379 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13380 if (attr
== NULL
|| !attr
->form_is_block ())
13382 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13383 "DW_TAG_call_site child DIE %s [in module %s]"),
13384 sect_offset_str (child_die
->sect_off
),
13385 objfile_name (objfile
));
13388 parameter
->value
= DW_BLOCK (attr
)->data
;
13389 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13391 /* Parameters are not pre-cleared by memset above. */
13392 parameter
->data_value
= NULL
;
13393 parameter
->data_value_size
= 0;
13394 call_site
->parameter_count
++;
13396 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13398 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13399 if (attr
!= nullptr)
13401 if (!attr
->form_is_block ())
13402 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13403 "DW_TAG_call_site child DIE %s [in module %s]"),
13404 sect_offset_str (child_die
->sect_off
),
13405 objfile_name (objfile
));
13408 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13409 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13415 /* Helper function for read_variable. If DIE represents a virtual
13416 table, then return the type of the concrete object that is
13417 associated with the virtual table. Otherwise, return NULL. */
13419 static struct type
*
13420 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13422 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13426 /* Find the type DIE. */
13427 struct die_info
*type_die
= NULL
;
13428 struct dwarf2_cu
*type_cu
= cu
;
13430 if (attr
->form_is_ref ())
13431 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13432 if (type_die
== NULL
)
13435 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13437 return die_containing_type (type_die
, type_cu
);
13440 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13443 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13445 struct rust_vtable_symbol
*storage
= NULL
;
13447 if (cu
->language
== language_rust
)
13449 struct type
*containing_type
= rust_containing_type (die
, cu
);
13451 if (containing_type
!= NULL
)
13453 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13455 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
13456 initialize_objfile_symbol (storage
);
13457 storage
->concrete_type
= containing_type
;
13458 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13462 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13463 struct attribute
*abstract_origin
13464 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13465 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13466 if (res
== NULL
&& loc
&& abstract_origin
)
13468 /* We have a variable without a name, but with a location and an abstract
13469 origin. This may be a concrete instance of an abstract variable
13470 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13472 struct dwarf2_cu
*origin_cu
= cu
;
13473 struct die_info
*origin_die
13474 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13475 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13476 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13480 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13481 reading .debug_rnglists.
13482 Callback's type should be:
13483 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13484 Return true if the attributes are present and valid, otherwise,
13487 template <typename Callback
>
13489 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13490 Callback
&&callback
)
13492 struct dwarf2_per_objfile
*dwarf2_per_objfile
13493 = cu
->per_cu
->dwarf2_per_objfile
;
13494 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13495 bfd
*obfd
= objfile
->obfd
;
13496 /* Base address selection entry. */
13497 gdb::optional
<CORE_ADDR
> base
;
13498 const gdb_byte
*buffer
;
13499 CORE_ADDR baseaddr
;
13500 bool overflow
= false;
13502 base
= cu
->base_address
;
13504 dwarf2_per_objfile
->rnglists
.read (objfile
);
13505 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13507 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13511 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13513 baseaddr
= objfile
->text_section_offset ();
13517 /* Initialize it due to a false compiler warning. */
13518 CORE_ADDR range_beginning
= 0, range_end
= 0;
13519 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13520 + dwarf2_per_objfile
->rnglists
.size
);
13521 unsigned int bytes_read
;
13523 if (buffer
== buf_end
)
13528 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13531 case DW_RLE_end_of_list
:
13533 case DW_RLE_base_address
:
13534 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13539 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13540 buffer
+= bytes_read
;
13542 case DW_RLE_start_length
:
13543 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13548 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13550 buffer
+= bytes_read
;
13551 range_end
= (range_beginning
13552 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13553 buffer
+= bytes_read
;
13554 if (buffer
> buf_end
)
13560 case DW_RLE_offset_pair
:
13561 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13562 buffer
+= bytes_read
;
13563 if (buffer
> buf_end
)
13568 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13569 buffer
+= bytes_read
;
13570 if (buffer
> buf_end
)
13576 case DW_RLE_start_end
:
13577 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13582 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13584 buffer
+= bytes_read
;
13585 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13586 buffer
+= bytes_read
;
13589 complaint (_("Invalid .debug_rnglists data (no base address)"));
13592 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13594 if (rlet
== DW_RLE_base_address
)
13597 if (!base
.has_value ())
13599 /* We have no valid base address for the ranges
13601 complaint (_("Invalid .debug_rnglists data (no base address)"));
13605 if (range_beginning
> range_end
)
13607 /* Inverted range entries are invalid. */
13608 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13612 /* Empty range entries have no effect. */
13613 if (range_beginning
== range_end
)
13616 range_beginning
+= *base
;
13617 range_end
+= *base
;
13619 /* A not-uncommon case of bad debug info.
13620 Don't pollute the addrmap with bad data. */
13621 if (range_beginning
+ baseaddr
== 0
13622 && !dwarf2_per_objfile
->has_section_at_zero
)
13624 complaint (_(".debug_rnglists entry has start address of zero"
13625 " [in module %s]"), objfile_name (objfile
));
13629 callback (range_beginning
, range_end
);
13634 complaint (_("Offset %d is not terminated "
13635 "for DW_AT_ranges attribute"),
13643 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13644 Callback's type should be:
13645 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13646 Return 1 if the attributes are present and valid, otherwise, return 0. */
13648 template <typename Callback
>
13650 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13651 Callback
&&callback
)
13653 struct dwarf2_per_objfile
*dwarf2_per_objfile
13654 = cu
->per_cu
->dwarf2_per_objfile
;
13655 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13656 struct comp_unit_head
*cu_header
= &cu
->header
;
13657 bfd
*obfd
= objfile
->obfd
;
13658 unsigned int addr_size
= cu_header
->addr_size
;
13659 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13660 /* Base address selection entry. */
13661 gdb::optional
<CORE_ADDR
> base
;
13662 unsigned int dummy
;
13663 const gdb_byte
*buffer
;
13664 CORE_ADDR baseaddr
;
13666 if (cu_header
->version
>= 5)
13667 return dwarf2_rnglists_process (offset
, cu
, callback
);
13669 base
= cu
->base_address
;
13671 dwarf2_per_objfile
->ranges
.read (objfile
);
13672 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13674 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13678 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13680 baseaddr
= objfile
->text_section_offset ();
13684 CORE_ADDR range_beginning
, range_end
;
13686 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13687 buffer
+= addr_size
;
13688 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13689 buffer
+= addr_size
;
13690 offset
+= 2 * addr_size
;
13692 /* An end of list marker is a pair of zero addresses. */
13693 if (range_beginning
== 0 && range_end
== 0)
13694 /* Found the end of list entry. */
13697 /* Each base address selection entry is a pair of 2 values.
13698 The first is the largest possible address, the second is
13699 the base address. Check for a base address here. */
13700 if ((range_beginning
& mask
) == mask
)
13702 /* If we found the largest possible address, then we already
13703 have the base address in range_end. */
13708 if (!base
.has_value ())
13710 /* We have no valid base address for the ranges
13712 complaint (_("Invalid .debug_ranges data (no base address)"));
13716 if (range_beginning
> range_end
)
13718 /* Inverted range entries are invalid. */
13719 complaint (_("Invalid .debug_ranges data (inverted range)"));
13723 /* Empty range entries have no effect. */
13724 if (range_beginning
== range_end
)
13727 range_beginning
+= *base
;
13728 range_end
+= *base
;
13730 /* A not-uncommon case of bad debug info.
13731 Don't pollute the addrmap with bad data. */
13732 if (range_beginning
+ baseaddr
== 0
13733 && !dwarf2_per_objfile
->has_section_at_zero
)
13735 complaint (_(".debug_ranges entry has start address of zero"
13736 " [in module %s]"), objfile_name (objfile
));
13740 callback (range_beginning
, range_end
);
13746 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13747 Return 1 if the attributes are present and valid, otherwise, return 0.
13748 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13751 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13752 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13753 dwarf2_psymtab
*ranges_pst
)
13755 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13756 struct gdbarch
*gdbarch
= objfile
->arch ();
13757 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13760 CORE_ADDR high
= 0;
13763 retval
= dwarf2_ranges_process (offset
, cu
,
13764 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13766 if (ranges_pst
!= NULL
)
13771 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13772 range_beginning
+ baseaddr
)
13774 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13775 range_end
+ baseaddr
)
13777 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13778 lowpc
, highpc
- 1, ranges_pst
);
13781 /* FIXME: This is recording everything as a low-high
13782 segment of consecutive addresses. We should have a
13783 data structure for discontiguous block ranges
13787 low
= range_beginning
;
13793 if (range_beginning
< low
)
13794 low
= range_beginning
;
13795 if (range_end
> high
)
13803 /* If the first entry is an end-of-list marker, the range
13804 describes an empty scope, i.e. no instructions. */
13810 *high_return
= high
;
13814 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13815 definition for the return value. *LOWPC and *HIGHPC are set iff
13816 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13818 static enum pc_bounds_kind
13819 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13820 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13821 dwarf2_psymtab
*pst
)
13823 struct dwarf2_per_objfile
*dwarf2_per_objfile
13824 = cu
->per_cu
->dwarf2_per_objfile
;
13825 struct attribute
*attr
;
13826 struct attribute
*attr_high
;
13828 CORE_ADDR high
= 0;
13829 enum pc_bounds_kind ret
;
13831 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13834 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13835 if (attr
!= nullptr)
13837 low
= attr
->value_as_address ();
13838 high
= attr_high
->value_as_address ();
13839 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13843 /* Found high w/o low attribute. */
13844 return PC_BOUNDS_INVALID
;
13846 /* Found consecutive range of addresses. */
13847 ret
= PC_BOUNDS_HIGH_LOW
;
13851 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13854 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13855 We take advantage of the fact that DW_AT_ranges does not appear
13856 in DW_TAG_compile_unit of DWO files. */
13857 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13858 unsigned int ranges_offset
= (DW_UNSND (attr
)
13859 + (need_ranges_base
13863 /* Value of the DW_AT_ranges attribute is the offset in the
13864 .debug_ranges section. */
13865 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13866 return PC_BOUNDS_INVALID
;
13867 /* Found discontinuous range of addresses. */
13868 ret
= PC_BOUNDS_RANGES
;
13871 return PC_BOUNDS_NOT_PRESENT
;
13874 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
13876 return PC_BOUNDS_INVALID
;
13878 /* When using the GNU linker, .gnu.linkonce. sections are used to
13879 eliminate duplicate copies of functions and vtables and such.
13880 The linker will arbitrarily choose one and discard the others.
13881 The AT_*_pc values for such functions refer to local labels in
13882 these sections. If the section from that file was discarded, the
13883 labels are not in the output, so the relocs get a value of 0.
13884 If this is a discarded function, mark the pc bounds as invalid,
13885 so that GDB will ignore it. */
13886 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13887 return PC_BOUNDS_INVALID
;
13895 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13896 its low and high PC addresses. Do nothing if these addresses could not
13897 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13898 and HIGHPC to the high address if greater than HIGHPC. */
13901 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13902 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13903 struct dwarf2_cu
*cu
)
13905 CORE_ADDR low
, high
;
13906 struct die_info
*child
= die
->child
;
13908 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
13910 *lowpc
= std::min (*lowpc
, low
);
13911 *highpc
= std::max (*highpc
, high
);
13914 /* If the language does not allow nested subprograms (either inside
13915 subprograms or lexical blocks), we're done. */
13916 if (cu
->language
!= language_ada
)
13919 /* Check all the children of the given DIE. If it contains nested
13920 subprograms, then check their pc bounds. Likewise, we need to
13921 check lexical blocks as well, as they may also contain subprogram
13923 while (child
&& child
->tag
)
13925 if (child
->tag
== DW_TAG_subprogram
13926 || child
->tag
== DW_TAG_lexical_block
)
13927 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
13928 child
= child
->sibling
;
13932 /* Get the low and high pc's represented by the scope DIE, and store
13933 them in *LOWPC and *HIGHPC. If the correct values can't be
13934 determined, set *LOWPC to -1 and *HIGHPC to 0. */
13937 get_scope_pc_bounds (struct die_info
*die
,
13938 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13939 struct dwarf2_cu
*cu
)
13941 CORE_ADDR best_low
= (CORE_ADDR
) -1;
13942 CORE_ADDR best_high
= (CORE_ADDR
) 0;
13943 CORE_ADDR current_low
, current_high
;
13945 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
13946 >= PC_BOUNDS_RANGES
)
13948 best_low
= current_low
;
13949 best_high
= current_high
;
13953 struct die_info
*child
= die
->child
;
13955 while (child
&& child
->tag
)
13957 switch (child
->tag
) {
13958 case DW_TAG_subprogram
:
13959 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
13961 case DW_TAG_namespace
:
13962 case DW_TAG_module
:
13963 /* FIXME: carlton/2004-01-16: Should we do this for
13964 DW_TAG_class_type/DW_TAG_structure_type, too? I think
13965 that current GCC's always emit the DIEs corresponding
13966 to definitions of methods of classes as children of a
13967 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
13968 the DIEs giving the declarations, which could be
13969 anywhere). But I don't see any reason why the
13970 standards says that they have to be there. */
13971 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
13973 if (current_low
!= ((CORE_ADDR
) -1))
13975 best_low
= std::min (best_low
, current_low
);
13976 best_high
= std::max (best_high
, current_high
);
13984 child
= child
->sibling
;
13989 *highpc
= best_high
;
13992 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
13996 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
13997 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
13999 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14000 struct gdbarch
*gdbarch
= objfile
->arch ();
14001 struct attribute
*attr
;
14002 struct attribute
*attr_high
;
14004 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14007 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14008 if (attr
!= nullptr)
14010 CORE_ADDR low
= attr
->value_as_address ();
14011 CORE_ADDR high
= attr_high
->value_as_address ();
14013 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14016 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14017 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14018 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14022 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14023 if (attr
!= nullptr)
14025 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14026 We take advantage of the fact that DW_AT_ranges does not appear
14027 in DW_TAG_compile_unit of DWO files. */
14028 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14030 /* The value of the DW_AT_ranges attribute is the offset of the
14031 address range list in the .debug_ranges section. */
14032 unsigned long offset
= (DW_UNSND (attr
)
14033 + (need_ranges_base
? cu
->ranges_base
: 0));
14035 std::vector
<blockrange
> blockvec
;
14036 dwarf2_ranges_process (offset
, cu
,
14037 [&] (CORE_ADDR start
, CORE_ADDR end
)
14041 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14042 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14043 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14044 blockvec
.emplace_back (start
, end
);
14047 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14051 /* Check whether the producer field indicates either of GCC < 4.6, or the
14052 Intel C/C++ compiler, and cache the result in CU. */
14055 check_producer (struct dwarf2_cu
*cu
)
14059 if (cu
->producer
== NULL
)
14061 /* For unknown compilers expect their behavior is DWARF version
14064 GCC started to support .debug_types sections by -gdwarf-4 since
14065 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14066 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14067 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14068 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14070 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14072 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14073 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14075 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14077 cu
->producer_is_icc
= true;
14078 cu
->producer_is_icc_lt_14
= major
< 14;
14080 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14081 cu
->producer_is_codewarrior
= true;
14084 /* For other non-GCC compilers, expect their behavior is DWARF version
14088 cu
->checked_producer
= true;
14091 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14092 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14093 during 4.6.0 experimental. */
14096 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14098 if (!cu
->checked_producer
)
14099 check_producer (cu
);
14101 return cu
->producer_is_gxx_lt_4_6
;
14105 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14106 with incorrect is_stmt attributes. */
14109 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14111 if (!cu
->checked_producer
)
14112 check_producer (cu
);
14114 return cu
->producer_is_codewarrior
;
14117 /* Return the default accessibility type if it is not overridden by
14118 DW_AT_accessibility. */
14120 static enum dwarf_access_attribute
14121 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14123 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14125 /* The default DWARF 2 accessibility for members is public, the default
14126 accessibility for inheritance is private. */
14128 if (die
->tag
!= DW_TAG_inheritance
)
14129 return DW_ACCESS_public
;
14131 return DW_ACCESS_private
;
14135 /* DWARF 3+ defines the default accessibility a different way. The same
14136 rules apply now for DW_TAG_inheritance as for the members and it only
14137 depends on the container kind. */
14139 if (die
->parent
->tag
== DW_TAG_class_type
)
14140 return DW_ACCESS_private
;
14142 return DW_ACCESS_public
;
14146 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14147 offset. If the attribute was not found return 0, otherwise return
14148 1. If it was found but could not properly be handled, set *OFFSET
14152 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14155 struct attribute
*attr
;
14157 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14162 /* Note that we do not check for a section offset first here.
14163 This is because DW_AT_data_member_location is new in DWARF 4,
14164 so if we see it, we can assume that a constant form is really
14165 a constant and not a section offset. */
14166 if (attr
->form_is_constant ())
14167 *offset
= attr
->constant_value (0);
14168 else if (attr
->form_is_section_offset ())
14169 dwarf2_complex_location_expr_complaint ();
14170 else if (attr
->form_is_block ())
14171 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14173 dwarf2_complex_location_expr_complaint ();
14181 /* Add an aggregate field to the field list. */
14184 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14185 struct dwarf2_cu
*cu
)
14187 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14188 struct gdbarch
*gdbarch
= objfile
->arch ();
14189 struct nextfield
*new_field
;
14190 struct attribute
*attr
;
14192 const char *fieldname
= "";
14194 if (die
->tag
== DW_TAG_inheritance
)
14196 fip
->baseclasses
.emplace_back ();
14197 new_field
= &fip
->baseclasses
.back ();
14201 fip
->fields
.emplace_back ();
14202 new_field
= &fip
->fields
.back ();
14205 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14206 if (attr
!= nullptr)
14207 new_field
->accessibility
= DW_UNSND (attr
);
14209 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14210 if (new_field
->accessibility
!= DW_ACCESS_public
)
14211 fip
->non_public_fields
= 1;
14213 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14214 if (attr
!= nullptr)
14215 new_field
->virtuality
= DW_UNSND (attr
);
14217 new_field
->virtuality
= DW_VIRTUALITY_none
;
14219 fp
= &new_field
->field
;
14221 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14225 /* Data member other than a C++ static data member. */
14227 /* Get type of field. */
14228 fp
->type
= die_type (die
, cu
);
14230 SET_FIELD_BITPOS (*fp
, 0);
14232 /* Get bit size of field (zero if none). */
14233 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14234 if (attr
!= nullptr)
14236 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14240 FIELD_BITSIZE (*fp
) = 0;
14243 /* Get bit offset of field. */
14244 if (handle_data_member_location (die
, cu
, &offset
))
14245 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14246 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14247 if (attr
!= nullptr)
14249 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14251 /* For big endian bits, the DW_AT_bit_offset gives the
14252 additional bit offset from the MSB of the containing
14253 anonymous object to the MSB of the field. We don't
14254 have to do anything special since we don't need to
14255 know the size of the anonymous object. */
14256 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14260 /* For little endian bits, compute the bit offset to the
14261 MSB of the anonymous object, subtract off the number of
14262 bits from the MSB of the field to the MSB of the
14263 object, and then subtract off the number of bits of
14264 the field itself. The result is the bit offset of
14265 the LSB of the field. */
14266 int anonymous_size
;
14267 int bit_offset
= DW_UNSND (attr
);
14269 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14270 if (attr
!= nullptr)
14272 /* The size of the anonymous object containing
14273 the bit field is explicit, so use the
14274 indicated size (in bytes). */
14275 anonymous_size
= DW_UNSND (attr
);
14279 /* The size of the anonymous object containing
14280 the bit field must be inferred from the type
14281 attribute of the data member containing the
14283 anonymous_size
= TYPE_LENGTH (fp
->type
);
14285 SET_FIELD_BITPOS (*fp
,
14286 (FIELD_BITPOS (*fp
)
14287 + anonymous_size
* bits_per_byte
14288 - bit_offset
- FIELD_BITSIZE (*fp
)));
14291 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14293 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14294 + attr
->constant_value (0)));
14296 /* Get name of field. */
14297 fieldname
= dwarf2_name (die
, cu
);
14298 if (fieldname
== NULL
)
14301 /* The name is already allocated along with this objfile, so we don't
14302 need to duplicate it for the type. */
14303 fp
->name
= fieldname
;
14305 /* Change accessibility for artificial fields (e.g. virtual table
14306 pointer or virtual base class pointer) to private. */
14307 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14309 FIELD_ARTIFICIAL (*fp
) = 1;
14310 new_field
->accessibility
= DW_ACCESS_private
;
14311 fip
->non_public_fields
= 1;
14314 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14316 /* C++ static member. */
14318 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14319 is a declaration, but all versions of G++ as of this writing
14320 (so through at least 3.2.1) incorrectly generate
14321 DW_TAG_variable tags. */
14323 const char *physname
;
14325 /* Get name of field. */
14326 fieldname
= dwarf2_name (die
, cu
);
14327 if (fieldname
== NULL
)
14330 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14332 /* Only create a symbol if this is an external value.
14333 new_symbol checks this and puts the value in the global symbol
14334 table, which we want. If it is not external, new_symbol
14335 will try to put the value in cu->list_in_scope which is wrong. */
14336 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14338 /* A static const member, not much different than an enum as far as
14339 we're concerned, except that we can support more types. */
14340 new_symbol (die
, NULL
, cu
);
14343 /* Get physical name. */
14344 physname
= dwarf2_physname (fieldname
, die
, cu
);
14346 /* The name is already allocated along with this objfile, so we don't
14347 need to duplicate it for the type. */
14348 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14349 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14350 FIELD_NAME (*fp
) = fieldname
;
14352 else if (die
->tag
== DW_TAG_inheritance
)
14356 /* C++ base class field. */
14357 if (handle_data_member_location (die
, cu
, &offset
))
14358 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14359 FIELD_BITSIZE (*fp
) = 0;
14360 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14361 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14363 else if (die
->tag
== DW_TAG_variant_part
)
14365 /* process_structure_scope will treat this DIE as a union. */
14366 process_structure_scope (die
, cu
);
14368 /* The variant part is relative to the start of the enclosing
14370 SET_FIELD_BITPOS (*fp
, 0);
14371 fp
->type
= get_die_type (die
, cu
);
14372 fp
->artificial
= 1;
14373 fp
->name
= "<<variant>>";
14375 /* Normally a DW_TAG_variant_part won't have a size, but our
14376 representation requires one, so set it to the maximum of the
14377 child sizes, being sure to account for the offset at which
14378 each child is seen. */
14379 if (TYPE_LENGTH (fp
->type
) == 0)
14382 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
14384 unsigned len
= ((TYPE_FIELD_BITPOS (fp
->type
, i
) + 7) / 8
14385 + TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)));
14389 TYPE_LENGTH (fp
->type
) = max
;
14393 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14396 /* Can the type given by DIE define another type? */
14399 type_can_define_types (const struct die_info
*die
)
14403 case DW_TAG_typedef
:
14404 case DW_TAG_class_type
:
14405 case DW_TAG_structure_type
:
14406 case DW_TAG_union_type
:
14407 case DW_TAG_enumeration_type
:
14415 /* Add a type definition defined in the scope of the FIP's class. */
14418 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14419 struct dwarf2_cu
*cu
)
14421 struct decl_field fp
;
14422 memset (&fp
, 0, sizeof (fp
));
14424 gdb_assert (type_can_define_types (die
));
14426 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14427 fp
.name
= dwarf2_name (die
, cu
);
14428 fp
.type
= read_type_die (die
, cu
);
14430 /* Save accessibility. */
14431 enum dwarf_access_attribute accessibility
;
14432 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14434 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14436 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14437 switch (accessibility
)
14439 case DW_ACCESS_public
:
14440 /* The assumed value if neither private nor protected. */
14442 case DW_ACCESS_private
:
14445 case DW_ACCESS_protected
:
14446 fp
.is_protected
= 1;
14449 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14452 if (die
->tag
== DW_TAG_typedef
)
14453 fip
->typedef_field_list
.push_back (fp
);
14455 fip
->nested_types_list
.push_back (fp
);
14458 /* Create the vector of fields, and attach it to the type. */
14461 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14462 struct dwarf2_cu
*cu
)
14464 int nfields
= fip
->nfields ();
14466 /* Record the field count, allocate space for the array of fields,
14467 and create blank accessibility bitfields if necessary. */
14468 TYPE_NFIELDS (type
) = nfields
;
14469 TYPE_FIELDS (type
) = (struct field
*)
14470 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14472 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14474 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14476 TYPE_FIELD_PRIVATE_BITS (type
) =
14477 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14478 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14480 TYPE_FIELD_PROTECTED_BITS (type
) =
14481 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14482 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14484 TYPE_FIELD_IGNORE_BITS (type
) =
14485 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14486 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14489 /* If the type has baseclasses, allocate and clear a bit vector for
14490 TYPE_FIELD_VIRTUAL_BITS. */
14491 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14493 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14494 unsigned char *pointer
;
14496 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14497 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14498 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14499 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14500 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14503 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
14505 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
14507 for (int index
= 0; index
< nfields
; ++index
)
14509 struct nextfield
&field
= fip
->fields
[index
];
14511 if (field
.variant
.is_discriminant
)
14512 di
->discriminant_index
= index
;
14513 else if (field
.variant
.default_branch
)
14514 di
->default_index
= index
;
14516 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
14520 /* Copy the saved-up fields into the field vector. */
14521 for (int i
= 0; i
< nfields
; ++i
)
14523 struct nextfield
&field
14524 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14525 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14527 TYPE_FIELD (type
, i
) = field
.field
;
14528 switch (field
.accessibility
)
14530 case DW_ACCESS_private
:
14531 if (cu
->language
!= language_ada
)
14532 SET_TYPE_FIELD_PRIVATE (type
, i
);
14535 case DW_ACCESS_protected
:
14536 if (cu
->language
!= language_ada
)
14537 SET_TYPE_FIELD_PROTECTED (type
, i
);
14540 case DW_ACCESS_public
:
14544 /* Unknown accessibility. Complain and treat it as public. */
14546 complaint (_("unsupported accessibility %d"),
14547 field
.accessibility
);
14551 if (i
< fip
->baseclasses
.size ())
14553 switch (field
.virtuality
)
14555 case DW_VIRTUALITY_virtual
:
14556 case DW_VIRTUALITY_pure_virtual
:
14557 if (cu
->language
== language_ada
)
14558 error (_("unexpected virtuality in component of Ada type"));
14559 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14566 /* Return true if this member function is a constructor, false
14570 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14572 const char *fieldname
;
14573 const char *type_name
;
14576 if (die
->parent
== NULL
)
14579 if (die
->parent
->tag
!= DW_TAG_structure_type
14580 && die
->parent
->tag
!= DW_TAG_union_type
14581 && die
->parent
->tag
!= DW_TAG_class_type
)
14584 fieldname
= dwarf2_name (die
, cu
);
14585 type_name
= dwarf2_name (die
->parent
, cu
);
14586 if (fieldname
== NULL
|| type_name
== NULL
)
14589 len
= strlen (fieldname
);
14590 return (strncmp (fieldname
, type_name
, len
) == 0
14591 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14594 /* Check if the given VALUE is a recognized enum
14595 dwarf_defaulted_attribute constant according to DWARF5 spec,
14599 is_valid_DW_AT_defaulted (ULONGEST value
)
14603 case DW_DEFAULTED_no
:
14604 case DW_DEFAULTED_in_class
:
14605 case DW_DEFAULTED_out_of_class
:
14609 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14613 /* Add a member function to the proper fieldlist. */
14616 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14617 struct type
*type
, struct dwarf2_cu
*cu
)
14619 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14620 struct attribute
*attr
;
14622 struct fnfieldlist
*flp
= nullptr;
14623 struct fn_field
*fnp
;
14624 const char *fieldname
;
14625 struct type
*this_type
;
14626 enum dwarf_access_attribute accessibility
;
14628 if (cu
->language
== language_ada
)
14629 error (_("unexpected member function in Ada type"));
14631 /* Get name of member function. */
14632 fieldname
= dwarf2_name (die
, cu
);
14633 if (fieldname
== NULL
)
14636 /* Look up member function name in fieldlist. */
14637 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14639 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14641 flp
= &fip
->fnfieldlists
[i
];
14646 /* Create a new fnfieldlist if necessary. */
14647 if (flp
== nullptr)
14649 fip
->fnfieldlists
.emplace_back ();
14650 flp
= &fip
->fnfieldlists
.back ();
14651 flp
->name
= fieldname
;
14652 i
= fip
->fnfieldlists
.size () - 1;
14655 /* Create a new member function field and add it to the vector of
14657 flp
->fnfields
.emplace_back ();
14658 fnp
= &flp
->fnfields
.back ();
14660 /* Delay processing of the physname until later. */
14661 if (cu
->language
== language_cplus
)
14662 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14666 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14667 fnp
->physname
= physname
? physname
: "";
14670 fnp
->type
= alloc_type (objfile
);
14671 this_type
= read_type_die (die
, cu
);
14672 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14674 int nparams
= TYPE_NFIELDS (this_type
);
14676 /* TYPE is the domain of this method, and THIS_TYPE is the type
14677 of the method itself (TYPE_CODE_METHOD). */
14678 smash_to_method_type (fnp
->type
, type
,
14679 TYPE_TARGET_TYPE (this_type
),
14680 TYPE_FIELDS (this_type
),
14681 TYPE_NFIELDS (this_type
),
14682 TYPE_VARARGS (this_type
));
14684 /* Handle static member functions.
14685 Dwarf2 has no clean way to discern C++ static and non-static
14686 member functions. G++ helps GDB by marking the first
14687 parameter for non-static member functions (which is the this
14688 pointer) as artificial. We obtain this information from
14689 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14690 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14691 fnp
->voffset
= VOFFSET_STATIC
;
14694 complaint (_("member function type missing for '%s'"),
14695 dwarf2_full_name (fieldname
, die
, cu
));
14697 /* Get fcontext from DW_AT_containing_type if present. */
14698 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14699 fnp
->fcontext
= die_containing_type (die
, cu
);
14701 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14702 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14704 /* Get accessibility. */
14705 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14706 if (attr
!= nullptr)
14707 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14709 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14710 switch (accessibility
)
14712 case DW_ACCESS_private
:
14713 fnp
->is_private
= 1;
14715 case DW_ACCESS_protected
:
14716 fnp
->is_protected
= 1;
14720 /* Check for artificial methods. */
14721 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
14722 if (attr
&& DW_UNSND (attr
) != 0)
14723 fnp
->is_artificial
= 1;
14725 /* Check for defaulted methods. */
14726 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
14727 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
14728 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
14730 /* Check for deleted methods. */
14731 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
14732 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
14733 fnp
->is_deleted
= 1;
14735 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
14737 /* Get index in virtual function table if it is a virtual member
14738 function. For older versions of GCC, this is an offset in the
14739 appropriate virtual table, as specified by DW_AT_containing_type.
14740 For everyone else, it is an expression to be evaluated relative
14741 to the object address. */
14743 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14744 if (attr
!= nullptr)
14746 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
14748 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14750 /* Old-style GCC. */
14751 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14753 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14754 || (DW_BLOCK (attr
)->size
> 1
14755 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14756 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14758 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14759 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
14760 dwarf2_complex_location_expr_complaint ();
14762 fnp
->voffset
/= cu
->header
.addr_size
;
14766 dwarf2_complex_location_expr_complaint ();
14768 if (!fnp
->fcontext
)
14770 /* If there is no `this' field and no DW_AT_containing_type,
14771 we cannot actually find a base class context for the
14773 if (TYPE_NFIELDS (this_type
) == 0
14774 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
14776 complaint (_("cannot determine context for virtual member "
14777 "function \"%s\" (offset %s)"),
14778 fieldname
, sect_offset_str (die
->sect_off
));
14783 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
14787 else if (attr
->form_is_section_offset ())
14789 dwarf2_complex_location_expr_complaint ();
14793 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
14799 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14800 if (attr
&& DW_UNSND (attr
))
14802 /* GCC does this, as of 2008-08-25; PR debug/37237. */
14803 complaint (_("Member function \"%s\" (offset %s) is virtual "
14804 "but the vtable offset is not specified"),
14805 fieldname
, sect_offset_str (die
->sect_off
));
14806 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14807 TYPE_CPLUS_DYNAMIC (type
) = 1;
14812 /* Create the vector of member function fields, and attach it to the type. */
14815 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
14816 struct dwarf2_cu
*cu
)
14818 if (cu
->language
== language_ada
)
14819 error (_("unexpected member functions in Ada type"));
14821 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14822 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
14824 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
14826 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14828 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
14829 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
14831 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
14832 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
14833 fn_flp
->fn_fields
= (struct fn_field
*)
14834 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
14836 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
14837 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
14840 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
14843 /* Returns non-zero if NAME is the name of a vtable member in CU's
14844 language, zero otherwise. */
14846 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
14848 static const char vptr
[] = "_vptr";
14850 /* Look for the C++ form of the vtable. */
14851 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
14857 /* GCC outputs unnamed structures that are really pointers to member
14858 functions, with the ABI-specified layout. If TYPE describes
14859 such a structure, smash it into a member function type.
14861 GCC shouldn't do this; it should just output pointer to member DIEs.
14862 This is GCC PR debug/28767. */
14865 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
14867 struct type
*pfn_type
, *self_type
, *new_type
;
14869 /* Check for a structure with no name and two children. */
14870 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
14873 /* Check for __pfn and __delta members. */
14874 if (TYPE_FIELD_NAME (type
, 0) == NULL
14875 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
14876 || TYPE_FIELD_NAME (type
, 1) == NULL
14877 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
14880 /* Find the type of the method. */
14881 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
14882 if (pfn_type
== NULL
14883 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
14884 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
14887 /* Look for the "this" argument. */
14888 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
14889 if (TYPE_NFIELDS (pfn_type
) == 0
14890 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
14891 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
14894 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
14895 new_type
= alloc_type (objfile
);
14896 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
14897 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
14898 TYPE_VARARGS (pfn_type
));
14899 smash_to_methodptr_type (type
, new_type
);
14902 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
14903 appropriate error checking and issuing complaints if there is a
14907 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
14909 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
14911 if (attr
== nullptr)
14914 if (!attr
->form_is_constant ())
14916 complaint (_("DW_AT_alignment must have constant form"
14917 " - DIE at %s [in module %s]"),
14918 sect_offset_str (die
->sect_off
),
14919 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
14924 if (attr
->form
== DW_FORM_sdata
)
14926 LONGEST val
= DW_SND (attr
);
14929 complaint (_("DW_AT_alignment value must not be negative"
14930 " - DIE at %s [in module %s]"),
14931 sect_offset_str (die
->sect_off
),
14932 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
14938 align
= DW_UNSND (attr
);
14942 complaint (_("DW_AT_alignment value must not be zero"
14943 " - DIE at %s [in module %s]"),
14944 sect_offset_str (die
->sect_off
),
14945 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
14948 if ((align
& (align
- 1)) != 0)
14950 complaint (_("DW_AT_alignment value must be a power of 2"
14951 " - DIE at %s [in module %s]"),
14952 sect_offset_str (die
->sect_off
),
14953 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
14960 /* If the DIE has a DW_AT_alignment attribute, use its value to set
14961 the alignment for TYPE. */
14964 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
14967 if (!set_type_align (type
, get_alignment (cu
, die
)))
14968 complaint (_("DW_AT_alignment value too large"
14969 " - DIE at %s [in module %s]"),
14970 sect_offset_str (die
->sect_off
),
14971 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
14974 /* Check if the given VALUE is a valid enum dwarf_calling_convention
14975 constant for a type, according to DWARF5 spec, Table 5.5. */
14978 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
14983 case DW_CC_pass_by_reference
:
14984 case DW_CC_pass_by_value
:
14988 complaint (_("unrecognized DW_AT_calling_convention value "
14989 "(%s) for a type"), pulongest (value
));
14994 /* Check if the given VALUE is a valid enum dwarf_calling_convention
14995 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
14996 also according to GNU-specific values (see include/dwarf2.h). */
14999 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15004 case DW_CC_program
:
15008 case DW_CC_GNU_renesas_sh
:
15009 case DW_CC_GNU_borland_fastcall_i386
:
15010 case DW_CC_GDB_IBM_OpenCL
:
15014 complaint (_("unrecognized DW_AT_calling_convention value "
15015 "(%s) for a subroutine"), pulongest (value
));
15020 /* Called when we find the DIE that starts a structure or union scope
15021 (definition) to create a type for the structure or union. Fill in
15022 the type's name and general properties; the members will not be
15023 processed until process_structure_scope. A symbol table entry for
15024 the type will also not be done until process_structure_scope (assuming
15025 the type has a name).
15027 NOTE: we need to call these functions regardless of whether or not the
15028 DIE has a DW_AT_name attribute, since it might be an anonymous
15029 structure or union. This gets the type entered into our set of
15030 user defined types. */
15032 static struct type
*
15033 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15035 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15037 struct attribute
*attr
;
15040 /* If the definition of this type lives in .debug_types, read that type.
15041 Don't follow DW_AT_specification though, that will take us back up
15042 the chain and we want to go down. */
15043 attr
= die
->attr (DW_AT_signature
);
15044 if (attr
!= nullptr)
15046 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15048 /* The type's CU may not be the same as CU.
15049 Ensure TYPE is recorded with CU in die_type_hash. */
15050 return set_die_type (die
, type
, cu
);
15053 type
= alloc_type (objfile
);
15054 INIT_CPLUS_SPECIFIC (type
);
15056 name
= dwarf2_name (die
, cu
);
15059 if (cu
->language
== language_cplus
15060 || cu
->language
== language_d
15061 || cu
->language
== language_rust
)
15063 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15065 /* dwarf2_full_name might have already finished building the DIE's
15066 type. If so, there is no need to continue. */
15067 if (get_die_type (die
, cu
) != NULL
)
15068 return get_die_type (die
, cu
);
15070 TYPE_NAME (type
) = full_name
;
15074 /* The name is already allocated along with this objfile, so
15075 we don't need to duplicate it for the type. */
15076 TYPE_NAME (type
) = name
;
15080 if (die
->tag
== DW_TAG_structure_type
)
15082 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15084 else if (die
->tag
== DW_TAG_union_type
)
15086 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15088 else if (die
->tag
== DW_TAG_variant_part
)
15090 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15091 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15095 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15098 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15099 TYPE_DECLARED_CLASS (type
) = 1;
15101 /* Store the calling convention in the type if it's available in
15102 the die. Otherwise the calling convention remains set to
15103 the default value DW_CC_normal. */
15104 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15105 if (attr
!= nullptr
15106 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15108 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15109 TYPE_CPLUS_CALLING_CONVENTION (type
)
15110 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15113 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15114 if (attr
!= nullptr)
15116 if (attr
->form_is_constant ())
15117 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15120 /* For the moment, dynamic type sizes are not supported
15121 by GDB's struct type. The actual size is determined
15122 on-demand when resolving the type of a given object,
15123 so set the type's length to zero for now. Otherwise,
15124 we record an expression as the length, and that expression
15125 could lead to a very large value, which could eventually
15126 lead to us trying to allocate that much memory when creating
15127 a value of that type. */
15128 TYPE_LENGTH (type
) = 0;
15133 TYPE_LENGTH (type
) = 0;
15136 maybe_set_alignment (cu
, die
, type
);
15138 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15140 /* ICC<14 does not output the required DW_AT_declaration on
15141 incomplete types, but gives them a size of zero. */
15142 TYPE_STUB (type
) = 1;
15145 TYPE_STUB_SUPPORTED (type
) = 1;
15147 if (die_is_declaration (die
, cu
))
15148 TYPE_STUB (type
) = 1;
15149 else if (attr
== NULL
&& die
->child
== NULL
15150 && producer_is_realview (cu
->producer
))
15151 /* RealView does not output the required DW_AT_declaration
15152 on incomplete types. */
15153 TYPE_STUB (type
) = 1;
15155 /* We need to add the type field to the die immediately so we don't
15156 infinitely recurse when dealing with pointers to the structure
15157 type within the structure itself. */
15158 set_die_type (die
, type
, cu
);
15160 /* set_die_type should be already done. */
15161 set_descriptive_type (type
, die
, cu
);
15166 /* A helper for process_structure_scope that handles a single member
15170 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15171 struct field_info
*fi
,
15172 std::vector
<struct symbol
*> *template_args
,
15173 struct dwarf2_cu
*cu
)
15175 if (child_die
->tag
== DW_TAG_member
15176 || child_die
->tag
== DW_TAG_variable
15177 || child_die
->tag
== DW_TAG_variant_part
)
15179 /* NOTE: carlton/2002-11-05: A C++ static data member
15180 should be a DW_TAG_member that is a declaration, but
15181 all versions of G++ as of this writing (so through at
15182 least 3.2.1) incorrectly generate DW_TAG_variable
15183 tags for them instead. */
15184 dwarf2_add_field (fi
, child_die
, cu
);
15186 else if (child_die
->tag
== DW_TAG_subprogram
)
15188 /* Rust doesn't have member functions in the C++ sense.
15189 However, it does emit ordinary functions as children
15190 of a struct DIE. */
15191 if (cu
->language
== language_rust
)
15192 read_func_scope (child_die
, cu
);
15195 /* C++ member function. */
15196 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15199 else if (child_die
->tag
== DW_TAG_inheritance
)
15201 /* C++ base class field. */
15202 dwarf2_add_field (fi
, child_die
, cu
);
15204 else if (type_can_define_types (child_die
))
15205 dwarf2_add_type_defn (fi
, child_die
, cu
);
15206 else if (child_die
->tag
== DW_TAG_template_type_param
15207 || child_die
->tag
== DW_TAG_template_value_param
)
15209 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15212 template_args
->push_back (arg
);
15214 else if (child_die
->tag
== DW_TAG_variant
)
15216 /* In a variant we want to get the discriminant and also add a
15217 field for our sole member child. */
15218 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15220 for (die_info
*variant_child
= child_die
->child
;
15221 variant_child
!= NULL
;
15222 variant_child
= variant_child
->sibling
)
15224 if (variant_child
->tag
== DW_TAG_member
)
15226 handle_struct_member_die (variant_child
, type
, fi
,
15227 template_args
, cu
);
15228 /* Only handle the one. */
15233 /* We don't handle this but we might as well report it if we see
15235 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15236 complaint (_("DW_AT_discr_list is not supported yet"
15237 " - DIE at %s [in module %s]"),
15238 sect_offset_str (child_die
->sect_off
),
15239 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15241 /* The first field was just added, so we can stash the
15242 discriminant there. */
15243 gdb_assert (!fi
->fields
.empty ());
15245 fi
->fields
.back ().variant
.default_branch
= true;
15247 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15251 /* Finish creating a structure or union type, including filling in
15252 its members and creating a symbol for it. */
15255 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15257 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15258 struct die_info
*child_die
;
15261 type
= get_die_type (die
, cu
);
15263 type
= read_structure_type (die
, cu
);
15265 /* When reading a DW_TAG_variant_part, we need to notice when we
15266 read the discriminant member, so we can record it later in the
15267 discriminant_info. */
15268 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15269 sect_offset discr_offset
{};
15270 bool has_template_parameters
= false;
15272 if (is_variant_part
)
15274 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15277 /* Maybe it's a univariant form, an extension we support.
15278 In this case arrange not to check the offset. */
15279 is_variant_part
= false;
15281 else if (discr
->form_is_ref ())
15283 struct dwarf2_cu
*target_cu
= cu
;
15284 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15286 discr_offset
= target_die
->sect_off
;
15290 complaint (_("DW_AT_discr does not have DIE reference form"
15291 " - DIE at %s [in module %s]"),
15292 sect_offset_str (die
->sect_off
),
15293 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15294 is_variant_part
= false;
15298 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15300 struct field_info fi
;
15301 std::vector
<struct symbol
*> template_args
;
15303 child_die
= die
->child
;
15305 while (child_die
&& child_die
->tag
)
15307 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15309 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15310 fi
.fields
.back ().variant
.is_discriminant
= true;
15312 child_die
= child_die
->sibling
;
15315 /* Attach template arguments to type. */
15316 if (!template_args
.empty ())
15318 has_template_parameters
= true;
15319 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15320 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15321 TYPE_TEMPLATE_ARGUMENTS (type
)
15322 = XOBNEWVEC (&objfile
->objfile_obstack
,
15324 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15325 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15326 template_args
.data (),
15327 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15328 * sizeof (struct symbol
*)));
15331 /* Attach fields and member functions to the type. */
15332 if (fi
.nfields () > 0)
15333 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15334 if (!fi
.fnfieldlists
.empty ())
15336 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15338 /* Get the type which refers to the base class (possibly this
15339 class itself) which contains the vtable pointer for the current
15340 class from the DW_AT_containing_type attribute. This use of
15341 DW_AT_containing_type is a GNU extension. */
15343 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15345 struct type
*t
= die_containing_type (die
, cu
);
15347 set_type_vptr_basetype (type
, t
);
15352 /* Our own class provides vtbl ptr. */
15353 for (i
= TYPE_NFIELDS (t
) - 1;
15354 i
>= TYPE_N_BASECLASSES (t
);
15357 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15359 if (is_vtable_name (fieldname
, cu
))
15361 set_type_vptr_fieldno (type
, i
);
15366 /* Complain if virtual function table field not found. */
15367 if (i
< TYPE_N_BASECLASSES (t
))
15368 complaint (_("virtual function table pointer "
15369 "not found when defining class '%s'"),
15370 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15374 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15377 else if (cu
->producer
15378 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15380 /* The IBM XLC compiler does not provide direct indication
15381 of the containing type, but the vtable pointer is
15382 always named __vfp. */
15386 for (i
= TYPE_NFIELDS (type
) - 1;
15387 i
>= TYPE_N_BASECLASSES (type
);
15390 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15392 set_type_vptr_fieldno (type
, i
);
15393 set_type_vptr_basetype (type
, type
);
15400 /* Copy fi.typedef_field_list linked list elements content into the
15401 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15402 if (!fi
.typedef_field_list
.empty ())
15404 int count
= fi
.typedef_field_list
.size ();
15406 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15407 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15408 = ((struct decl_field
*)
15410 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15411 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15413 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15414 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15417 /* Copy fi.nested_types_list linked list elements content into the
15418 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15419 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15421 int count
= fi
.nested_types_list
.size ();
15423 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15424 TYPE_NESTED_TYPES_ARRAY (type
)
15425 = ((struct decl_field
*)
15426 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15427 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15429 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15430 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15434 quirk_gcc_member_function_pointer (type
, objfile
);
15435 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15436 cu
->rust_unions
.push_back (type
);
15438 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15439 snapshots) has been known to create a die giving a declaration
15440 for a class that has, as a child, a die giving a definition for a
15441 nested class. So we have to process our children even if the
15442 current die is a declaration. Normally, of course, a declaration
15443 won't have any children at all. */
15445 child_die
= die
->child
;
15447 while (child_die
!= NULL
&& child_die
->tag
)
15449 if (child_die
->tag
== DW_TAG_member
15450 || child_die
->tag
== DW_TAG_variable
15451 || child_die
->tag
== DW_TAG_inheritance
15452 || child_die
->tag
== DW_TAG_template_value_param
15453 || child_die
->tag
== DW_TAG_template_type_param
)
15458 process_die (child_die
, cu
);
15460 child_die
= child_die
->sibling
;
15463 /* Do not consider external references. According to the DWARF standard,
15464 these DIEs are identified by the fact that they have no byte_size
15465 attribute, and a declaration attribute. */
15466 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15467 || !die_is_declaration (die
, cu
))
15469 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15471 if (has_template_parameters
)
15473 struct symtab
*symtab
;
15474 if (sym
!= nullptr)
15475 symtab
= symbol_symtab (sym
);
15476 else if (cu
->line_header
!= nullptr)
15478 /* Any related symtab will do. */
15480 = cu
->line_header
->file_names ()[0].symtab
;
15485 complaint (_("could not find suitable "
15486 "symtab for template parameter"
15487 " - DIE at %s [in module %s]"),
15488 sect_offset_str (die
->sect_off
),
15489 objfile_name (objfile
));
15492 if (symtab
!= nullptr)
15494 /* Make sure that the symtab is set on the new symbols.
15495 Even though they don't appear in this symtab directly,
15496 other parts of gdb assume that symbols do, and this is
15497 reasonably true. */
15498 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15499 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15505 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
15506 update TYPE using some information only available in DIE's children. */
15509 update_enumeration_type_from_children (struct die_info
*die
,
15511 struct dwarf2_cu
*cu
)
15513 struct die_info
*child_die
;
15514 int unsigned_enum
= 1;
15517 auto_obstack obstack
;
15519 for (child_die
= die
->child
;
15520 child_die
!= NULL
&& child_die
->tag
;
15521 child_die
= child_die
->sibling
)
15523 struct attribute
*attr
;
15525 const gdb_byte
*bytes
;
15526 struct dwarf2_locexpr_baton
*baton
;
15529 if (child_die
->tag
!= DW_TAG_enumerator
)
15532 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15536 name
= dwarf2_name (child_die
, cu
);
15538 name
= "<anonymous enumerator>";
15540 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15541 &value
, &bytes
, &baton
);
15549 if (count_one_bits_ll (value
) >= 2)
15553 /* If we already know that the enum type is neither unsigned, nor
15554 a flag type, no need to look at the rest of the enumerates. */
15555 if (!unsigned_enum
&& !flag_enum
)
15560 TYPE_UNSIGNED (type
) = 1;
15562 TYPE_FLAG_ENUM (type
) = 1;
15565 /* Given a DW_AT_enumeration_type die, set its type. We do not
15566 complete the type's fields yet, or create any symbols. */
15568 static struct type
*
15569 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15571 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15573 struct attribute
*attr
;
15576 /* If the definition of this type lives in .debug_types, read that type.
15577 Don't follow DW_AT_specification though, that will take us back up
15578 the chain and we want to go down. */
15579 attr
= die
->attr (DW_AT_signature
);
15580 if (attr
!= nullptr)
15582 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15584 /* The type's CU may not be the same as CU.
15585 Ensure TYPE is recorded with CU in die_type_hash. */
15586 return set_die_type (die
, type
, cu
);
15589 type
= alloc_type (objfile
);
15591 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
15592 name
= dwarf2_full_name (NULL
, die
, cu
);
15594 TYPE_NAME (type
) = name
;
15596 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15599 struct type
*underlying_type
= die_type (die
, cu
);
15601 TYPE_TARGET_TYPE (type
) = underlying_type
;
15604 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15605 if (attr
!= nullptr)
15607 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15611 TYPE_LENGTH (type
) = 0;
15614 maybe_set_alignment (cu
, die
, type
);
15616 /* The enumeration DIE can be incomplete. In Ada, any type can be
15617 declared as private in the package spec, and then defined only
15618 inside the package body. Such types are known as Taft Amendment
15619 Types. When another package uses such a type, an incomplete DIE
15620 may be generated by the compiler. */
15621 if (die_is_declaration (die
, cu
))
15622 TYPE_STUB (type
) = 1;
15624 /* Finish the creation of this type by using the enum's children.
15625 We must call this even when the underlying type has been provided
15626 so that we can determine if we're looking at a "flag" enum. */
15627 update_enumeration_type_from_children (die
, type
, cu
);
15629 /* If this type has an underlying type that is not a stub, then we
15630 may use its attributes. We always use the "unsigned" attribute
15631 in this situation, because ordinarily we guess whether the type
15632 is unsigned -- but the guess can be wrong and the underlying type
15633 can tell us the reality. However, we defer to a local size
15634 attribute if one exists, because this lets the compiler override
15635 the underlying type if needed. */
15636 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
15638 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
15639 underlying_type
= check_typedef (underlying_type
);
15640 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
15641 if (TYPE_LENGTH (type
) == 0)
15642 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
15643 if (TYPE_RAW_ALIGN (type
) == 0
15644 && TYPE_RAW_ALIGN (underlying_type
) != 0)
15645 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
15648 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
15650 return set_die_type (die
, type
, cu
);
15653 /* Given a pointer to a die which begins an enumeration, process all
15654 the dies that define the members of the enumeration, and create the
15655 symbol for the enumeration type.
15657 NOTE: We reverse the order of the element list. */
15660 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15662 struct type
*this_type
;
15664 this_type
= get_die_type (die
, cu
);
15665 if (this_type
== NULL
)
15666 this_type
= read_enumeration_type (die
, cu
);
15668 if (die
->child
!= NULL
)
15670 struct die_info
*child_die
;
15671 struct symbol
*sym
;
15672 std::vector
<struct field
> fields
;
15675 child_die
= die
->child
;
15676 while (child_die
&& child_die
->tag
)
15678 if (child_die
->tag
!= DW_TAG_enumerator
)
15680 process_die (child_die
, cu
);
15684 name
= dwarf2_name (child_die
, cu
);
15687 sym
= new_symbol (child_die
, this_type
, cu
);
15689 fields
.emplace_back ();
15690 struct field
&field
= fields
.back ();
15692 FIELD_NAME (field
) = sym
->linkage_name ();
15693 FIELD_TYPE (field
) = NULL
;
15694 SET_FIELD_ENUMVAL (field
, SYMBOL_VALUE (sym
));
15695 FIELD_BITSIZE (field
) = 0;
15699 child_die
= child_die
->sibling
;
15702 if (!fields
.empty ())
15704 TYPE_NFIELDS (this_type
) = fields
.size ();
15705 TYPE_FIELDS (this_type
) = (struct field
*)
15706 TYPE_ALLOC (this_type
, sizeof (struct field
) * fields
.size ());
15707 memcpy (TYPE_FIELDS (this_type
), fields
.data (),
15708 sizeof (struct field
) * fields
.size ());
15712 /* If we are reading an enum from a .debug_types unit, and the enum
15713 is a declaration, and the enum is not the signatured type in the
15714 unit, then we do not want to add a symbol for it. Adding a
15715 symbol would in some cases obscure the true definition of the
15716 enum, giving users an incomplete type when the definition is
15717 actually available. Note that we do not want to do this for all
15718 enums which are just declarations, because C++0x allows forward
15719 enum declarations. */
15720 if (cu
->per_cu
->is_debug_types
15721 && die_is_declaration (die
, cu
))
15723 struct signatured_type
*sig_type
;
15725 sig_type
= (struct signatured_type
*) cu
->per_cu
;
15726 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
15727 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
15731 new_symbol (die
, this_type
, cu
);
15734 /* Extract all information from a DW_TAG_array_type DIE and put it in
15735 the DIE's type field. For now, this only handles one dimensional
15738 static struct type
*
15739 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15741 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15742 struct die_info
*child_die
;
15744 struct type
*element_type
, *range_type
, *index_type
;
15745 struct attribute
*attr
;
15747 struct dynamic_prop
*byte_stride_prop
= NULL
;
15748 unsigned int bit_stride
= 0;
15750 element_type
= die_type (die
, cu
);
15752 /* The die_type call above may have already set the type for this DIE. */
15753 type
= get_die_type (die
, cu
);
15757 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
15761 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
15764 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
15765 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
15769 complaint (_("unable to read array DW_AT_byte_stride "
15770 " - DIE at %s [in module %s]"),
15771 sect_offset_str (die
->sect_off
),
15772 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15773 /* Ignore this attribute. We will likely not be able to print
15774 arrays of this type correctly, but there is little we can do
15775 to help if we cannot read the attribute's value. */
15776 byte_stride_prop
= NULL
;
15780 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
15782 bit_stride
= DW_UNSND (attr
);
15784 /* Irix 6.2 native cc creates array types without children for
15785 arrays with unspecified length. */
15786 if (die
->child
== NULL
)
15788 index_type
= objfile_type (objfile
)->builtin_int
;
15789 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
15790 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
15791 byte_stride_prop
, bit_stride
);
15792 return set_die_type (die
, type
, cu
);
15795 std::vector
<struct type
*> range_types
;
15796 child_die
= die
->child
;
15797 while (child_die
&& child_die
->tag
)
15799 if (child_die
->tag
== DW_TAG_subrange_type
)
15801 struct type
*child_type
= read_type_die (child_die
, cu
);
15803 if (child_type
!= NULL
)
15805 /* The range type was succesfully read. Save it for the
15806 array type creation. */
15807 range_types
.push_back (child_type
);
15810 child_die
= child_die
->sibling
;
15813 /* Dwarf2 dimensions are output from left to right, create the
15814 necessary array types in backwards order. */
15816 type
= element_type
;
15818 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
15822 while (i
< range_types
.size ())
15823 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
15824 byte_stride_prop
, bit_stride
);
15828 size_t ndim
= range_types
.size ();
15830 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
15831 byte_stride_prop
, bit_stride
);
15834 /* Understand Dwarf2 support for vector types (like they occur on
15835 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
15836 array type. This is not part of the Dwarf2/3 standard yet, but a
15837 custom vendor extension. The main difference between a regular
15838 array and the vector variant is that vectors are passed by value
15840 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
15841 if (attr
!= nullptr)
15842 make_vector_type (type
);
15844 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
15845 implementation may choose to implement triple vectors using this
15847 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15848 if (attr
!= nullptr)
15850 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
15851 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15853 complaint (_("DW_AT_byte_size for array type smaller "
15854 "than the total size of elements"));
15857 name
= dwarf2_name (die
, cu
);
15859 TYPE_NAME (type
) = name
;
15861 maybe_set_alignment (cu
, die
, type
);
15863 /* Install the type in the die. */
15864 set_die_type (die
, type
, cu
);
15866 /* set_die_type should be already done. */
15867 set_descriptive_type (type
, die
, cu
);
15872 static enum dwarf_array_dim_ordering
15873 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
15875 struct attribute
*attr
;
15877 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
15879 if (attr
!= nullptr)
15880 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
15882 /* GNU F77 is a special case, as at 08/2004 array type info is the
15883 opposite order to the dwarf2 specification, but data is still
15884 laid out as per normal fortran.
15886 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
15887 version checking. */
15889 if (cu
->language
== language_fortran
15890 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
15892 return DW_ORD_row_major
;
15895 switch (cu
->language_defn
->la_array_ordering
)
15897 case array_column_major
:
15898 return DW_ORD_col_major
;
15899 case array_row_major
:
15901 return DW_ORD_row_major
;
15905 /* Extract all information from a DW_TAG_set_type DIE and put it in
15906 the DIE's type field. */
15908 static struct type
*
15909 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15911 struct type
*domain_type
, *set_type
;
15912 struct attribute
*attr
;
15914 domain_type
= die_type (die
, cu
);
15916 /* The die_type call above may have already set the type for this DIE. */
15917 set_type
= get_die_type (die
, cu
);
15921 set_type
= create_set_type (NULL
, domain_type
);
15923 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15924 if (attr
!= nullptr)
15925 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
15927 maybe_set_alignment (cu
, die
, set_type
);
15929 return set_die_type (die
, set_type
, cu
);
15932 /* A helper for read_common_block that creates a locexpr baton.
15933 SYM is the symbol which we are marking as computed.
15934 COMMON_DIE is the DIE for the common block.
15935 COMMON_LOC is the location expression attribute for the common
15937 MEMBER_LOC is the location expression attribute for the particular
15938 member of the common block that we are processing.
15939 CU is the CU from which the above come. */
15942 mark_common_block_symbol_computed (struct symbol
*sym
,
15943 struct die_info
*common_die
,
15944 struct attribute
*common_loc
,
15945 struct attribute
*member_loc
,
15946 struct dwarf2_cu
*cu
)
15948 struct dwarf2_per_objfile
*dwarf2_per_objfile
15949 = cu
->per_cu
->dwarf2_per_objfile
;
15950 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15951 struct dwarf2_locexpr_baton
*baton
;
15953 unsigned int cu_off
;
15954 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
15955 LONGEST offset
= 0;
15957 gdb_assert (common_loc
&& member_loc
);
15958 gdb_assert (common_loc
->form_is_block ());
15959 gdb_assert (member_loc
->form_is_block ()
15960 || member_loc
->form_is_constant ());
15962 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
15963 baton
->per_cu
= cu
->per_cu
;
15964 gdb_assert (baton
->per_cu
);
15966 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
15968 if (member_loc
->form_is_constant ())
15970 offset
= member_loc
->constant_value (0);
15971 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
15974 baton
->size
+= DW_BLOCK (member_loc
)->size
;
15976 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
15979 *ptr
++ = DW_OP_call4
;
15980 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
15981 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
15984 if (member_loc
->form_is_constant ())
15986 *ptr
++ = DW_OP_addr
;
15987 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
15988 ptr
+= cu
->header
.addr_size
;
15992 /* We have to copy the data here, because DW_OP_call4 will only
15993 use a DW_AT_location attribute. */
15994 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
15995 ptr
+= DW_BLOCK (member_loc
)->size
;
15998 *ptr
++ = DW_OP_plus
;
15999 gdb_assert (ptr
- baton
->data
== baton
->size
);
16001 SYMBOL_LOCATION_BATON (sym
) = baton
;
16002 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16005 /* Create appropriate locally-scoped variables for all the
16006 DW_TAG_common_block entries. Also create a struct common_block
16007 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16008 is used to separate the common blocks name namespace from regular
16012 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16014 struct attribute
*attr
;
16016 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16017 if (attr
!= nullptr)
16019 /* Support the .debug_loc offsets. */
16020 if (attr
->form_is_block ())
16024 else if (attr
->form_is_section_offset ())
16026 dwarf2_complex_location_expr_complaint ();
16031 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16032 "common block member");
16037 if (die
->child
!= NULL
)
16039 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16040 struct die_info
*child_die
;
16041 size_t n_entries
= 0, size
;
16042 struct common_block
*common_block
;
16043 struct symbol
*sym
;
16045 for (child_die
= die
->child
;
16046 child_die
&& child_die
->tag
;
16047 child_die
= child_die
->sibling
)
16050 size
= (sizeof (struct common_block
)
16051 + (n_entries
- 1) * sizeof (struct symbol
*));
16053 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16055 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16056 common_block
->n_entries
= 0;
16058 for (child_die
= die
->child
;
16059 child_die
&& child_die
->tag
;
16060 child_die
= child_die
->sibling
)
16062 /* Create the symbol in the DW_TAG_common_block block in the current
16064 sym
= new_symbol (child_die
, NULL
, cu
);
16067 struct attribute
*member_loc
;
16069 common_block
->contents
[common_block
->n_entries
++] = sym
;
16071 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16075 /* GDB has handled this for a long time, but it is
16076 not specified by DWARF. It seems to have been
16077 emitted by gfortran at least as recently as:
16078 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16079 complaint (_("Variable in common block has "
16080 "DW_AT_data_member_location "
16081 "- DIE at %s [in module %s]"),
16082 sect_offset_str (child_die
->sect_off
),
16083 objfile_name (objfile
));
16085 if (member_loc
->form_is_section_offset ())
16086 dwarf2_complex_location_expr_complaint ();
16087 else if (member_loc
->form_is_constant ()
16088 || member_loc
->form_is_block ())
16090 if (attr
!= nullptr)
16091 mark_common_block_symbol_computed (sym
, die
, attr
,
16095 dwarf2_complex_location_expr_complaint ();
16100 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16101 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16105 /* Create a type for a C++ namespace. */
16107 static struct type
*
16108 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16110 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16111 const char *previous_prefix
, *name
;
16115 /* For extensions, reuse the type of the original namespace. */
16116 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16118 struct die_info
*ext_die
;
16119 struct dwarf2_cu
*ext_cu
= cu
;
16121 ext_die
= dwarf2_extension (die
, &ext_cu
);
16122 type
= read_type_die (ext_die
, ext_cu
);
16124 /* EXT_CU may not be the same as CU.
16125 Ensure TYPE is recorded with CU in die_type_hash. */
16126 return set_die_type (die
, type
, cu
);
16129 name
= namespace_name (die
, &is_anonymous
, cu
);
16131 /* Now build the name of the current namespace. */
16133 previous_prefix
= determine_prefix (die
, cu
);
16134 if (previous_prefix
[0] != '\0')
16135 name
= typename_concat (&objfile
->objfile_obstack
,
16136 previous_prefix
, name
, 0, cu
);
16138 /* Create the type. */
16139 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16141 return set_die_type (die
, type
, cu
);
16144 /* Read a namespace scope. */
16147 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16149 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16152 /* Add a symbol associated to this if we haven't seen the namespace
16153 before. Also, add a using directive if it's an anonymous
16156 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16160 type
= read_type_die (die
, cu
);
16161 new_symbol (die
, type
, cu
);
16163 namespace_name (die
, &is_anonymous
, cu
);
16166 const char *previous_prefix
= determine_prefix (die
, cu
);
16168 std::vector
<const char *> excludes
;
16169 add_using_directive (using_directives (cu
),
16170 previous_prefix
, TYPE_NAME (type
), NULL
,
16171 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16175 if (die
->child
!= NULL
)
16177 struct die_info
*child_die
= die
->child
;
16179 while (child_die
&& child_die
->tag
)
16181 process_die (child_die
, cu
);
16182 child_die
= child_die
->sibling
;
16187 /* Read a Fortran module as type. This DIE can be only a declaration used for
16188 imported module. Still we need that type as local Fortran "use ... only"
16189 declaration imports depend on the created type in determine_prefix. */
16191 static struct type
*
16192 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16194 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16195 const char *module_name
;
16198 module_name
= dwarf2_name (die
, cu
);
16199 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16201 return set_die_type (die
, type
, cu
);
16204 /* Read a Fortran module. */
16207 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16209 struct die_info
*child_die
= die
->child
;
16212 type
= read_type_die (die
, cu
);
16213 new_symbol (die
, type
, cu
);
16215 while (child_die
&& child_die
->tag
)
16217 process_die (child_die
, cu
);
16218 child_die
= child_die
->sibling
;
16222 /* Return the name of the namespace represented by DIE. Set
16223 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16226 static const char *
16227 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16229 struct die_info
*current_die
;
16230 const char *name
= NULL
;
16232 /* Loop through the extensions until we find a name. */
16234 for (current_die
= die
;
16235 current_die
!= NULL
;
16236 current_die
= dwarf2_extension (die
, &cu
))
16238 /* We don't use dwarf2_name here so that we can detect the absence
16239 of a name -> anonymous namespace. */
16240 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16246 /* Is it an anonymous namespace? */
16248 *is_anonymous
= (name
== NULL
);
16250 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16255 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16256 the user defined type vector. */
16258 static struct type
*
16259 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16261 struct gdbarch
*gdbarch
16262 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16263 struct comp_unit_head
*cu_header
= &cu
->header
;
16265 struct attribute
*attr_byte_size
;
16266 struct attribute
*attr_address_class
;
16267 int byte_size
, addr_class
;
16268 struct type
*target_type
;
16270 target_type
= die_type (die
, cu
);
16272 /* The die_type call above may have already set the type for this DIE. */
16273 type
= get_die_type (die
, cu
);
16277 type
= lookup_pointer_type (target_type
);
16279 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16280 if (attr_byte_size
)
16281 byte_size
= DW_UNSND (attr_byte_size
);
16283 byte_size
= cu_header
->addr_size
;
16285 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16286 if (attr_address_class
)
16287 addr_class
= DW_UNSND (attr_address_class
);
16289 addr_class
= DW_ADDR_none
;
16291 ULONGEST alignment
= get_alignment (cu
, die
);
16293 /* If the pointer size, alignment, or address class is different
16294 than the default, create a type variant marked as such and set
16295 the length accordingly. */
16296 if (TYPE_LENGTH (type
) != byte_size
16297 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16298 && alignment
!= TYPE_RAW_ALIGN (type
))
16299 || addr_class
!= DW_ADDR_none
)
16301 if (gdbarch_address_class_type_flags_p (gdbarch
))
16305 type_flags
= gdbarch_address_class_type_flags
16306 (gdbarch
, byte_size
, addr_class
);
16307 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16309 type
= make_type_with_address_space (type
, type_flags
);
16311 else if (TYPE_LENGTH (type
) != byte_size
)
16313 complaint (_("invalid pointer size %d"), byte_size
);
16315 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16317 complaint (_("Invalid DW_AT_alignment"
16318 " - DIE at %s [in module %s]"),
16319 sect_offset_str (die
->sect_off
),
16320 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16324 /* Should we also complain about unhandled address classes? */
16328 TYPE_LENGTH (type
) = byte_size
;
16329 set_type_align (type
, alignment
);
16330 return set_die_type (die
, type
, cu
);
16333 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16334 the user defined type vector. */
16336 static struct type
*
16337 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16340 struct type
*to_type
;
16341 struct type
*domain
;
16343 to_type
= die_type (die
, cu
);
16344 domain
= die_containing_type (die
, cu
);
16346 /* The calls above may have already set the type for this DIE. */
16347 type
= get_die_type (die
, cu
);
16351 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16352 type
= lookup_methodptr_type (to_type
);
16353 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16355 struct type
*new_type
16356 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16358 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16359 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16360 TYPE_VARARGS (to_type
));
16361 type
= lookup_methodptr_type (new_type
);
16364 type
= lookup_memberptr_type (to_type
, domain
);
16366 return set_die_type (die
, type
, cu
);
16369 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16370 the user defined type vector. */
16372 static struct type
*
16373 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16374 enum type_code refcode
)
16376 struct comp_unit_head
*cu_header
= &cu
->header
;
16377 struct type
*type
, *target_type
;
16378 struct attribute
*attr
;
16380 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16382 target_type
= die_type (die
, cu
);
16384 /* The die_type call above may have already set the type for this DIE. */
16385 type
= get_die_type (die
, cu
);
16389 type
= lookup_reference_type (target_type
, refcode
);
16390 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16391 if (attr
!= nullptr)
16393 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16397 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16399 maybe_set_alignment (cu
, die
, type
);
16400 return set_die_type (die
, type
, cu
);
16403 /* Add the given cv-qualifiers to the element type of the array. GCC
16404 outputs DWARF type qualifiers that apply to an array, not the
16405 element type. But GDB relies on the array element type to carry
16406 the cv-qualifiers. This mimics section 6.7.3 of the C99
16409 static struct type
*
16410 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16411 struct type
*base_type
, int cnst
, int voltl
)
16413 struct type
*el_type
, *inner_array
;
16415 base_type
= copy_type (base_type
);
16416 inner_array
= base_type
;
16418 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16420 TYPE_TARGET_TYPE (inner_array
) =
16421 copy_type (TYPE_TARGET_TYPE (inner_array
));
16422 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16425 el_type
= TYPE_TARGET_TYPE (inner_array
);
16426 cnst
|= TYPE_CONST (el_type
);
16427 voltl
|= TYPE_VOLATILE (el_type
);
16428 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16430 return set_die_type (die
, base_type
, cu
);
16433 static struct type
*
16434 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16436 struct type
*base_type
, *cv_type
;
16438 base_type
= die_type (die
, cu
);
16440 /* The die_type call above may have already set the type for this DIE. */
16441 cv_type
= get_die_type (die
, cu
);
16445 /* In case the const qualifier is applied to an array type, the element type
16446 is so qualified, not the array type (section 6.7.3 of C99). */
16447 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16448 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16450 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16451 return set_die_type (die
, cv_type
, cu
);
16454 static struct type
*
16455 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16457 struct type
*base_type
, *cv_type
;
16459 base_type
= die_type (die
, cu
);
16461 /* The die_type call above may have already set the type for this DIE. */
16462 cv_type
= get_die_type (die
, cu
);
16466 /* In case the volatile qualifier is applied to an array type, the
16467 element type is so qualified, not the array type (section 6.7.3
16469 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16470 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16472 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16473 return set_die_type (die
, cv_type
, cu
);
16476 /* Handle DW_TAG_restrict_type. */
16478 static struct type
*
16479 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16481 struct type
*base_type
, *cv_type
;
16483 base_type
= die_type (die
, cu
);
16485 /* The die_type call above may have already set the type for this DIE. */
16486 cv_type
= get_die_type (die
, cu
);
16490 cv_type
= make_restrict_type (base_type
);
16491 return set_die_type (die
, cv_type
, cu
);
16494 /* Handle DW_TAG_atomic_type. */
16496 static struct type
*
16497 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16499 struct type
*base_type
, *cv_type
;
16501 base_type
= die_type (die
, cu
);
16503 /* The die_type call above may have already set the type for this DIE. */
16504 cv_type
= get_die_type (die
, cu
);
16508 cv_type
= make_atomic_type (base_type
);
16509 return set_die_type (die
, cv_type
, cu
);
16512 /* Extract all information from a DW_TAG_string_type DIE and add to
16513 the user defined type vector. It isn't really a user defined type,
16514 but it behaves like one, with other DIE's using an AT_user_def_type
16515 attribute to reference it. */
16517 static struct type
*
16518 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16520 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16521 struct gdbarch
*gdbarch
= objfile
->arch ();
16522 struct type
*type
, *range_type
, *index_type
, *char_type
;
16523 struct attribute
*attr
;
16524 struct dynamic_prop prop
;
16525 bool length_is_constant
= true;
16528 /* There are a couple of places where bit sizes might be made use of
16529 when parsing a DW_TAG_string_type, however, no producer that we know
16530 of make use of these. Handling bit sizes that are a multiple of the
16531 byte size is easy enough, but what about other bit sizes? Lets deal
16532 with that problem when we have to. Warn about these attributes being
16533 unsupported, then parse the type and ignore them like we always
16535 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16536 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16538 static bool warning_printed
= false;
16539 if (!warning_printed
)
16541 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16542 "currently supported on DW_TAG_string_type."));
16543 warning_printed
= true;
16547 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16548 if (attr
!= nullptr && !attr
->form_is_constant ())
16550 /* The string length describes the location at which the length of
16551 the string can be found. The size of the length field can be
16552 specified with one of the attributes below. */
16553 struct type
*prop_type
;
16554 struct attribute
*len
16555 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16556 if (len
== nullptr)
16557 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16558 if (len
!= nullptr && len
->form_is_constant ())
16560 /* Pass 0 as the default as we know this attribute is constant
16561 and the default value will not be returned. */
16562 LONGEST sz
= len
->constant_value (0);
16563 prop_type
= cu
->per_cu
->int_type (sz
, true);
16567 /* If the size is not specified then we assume it is the size of
16568 an address on this target. */
16569 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16572 /* Convert the attribute into a dynamic property. */
16573 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16576 length_is_constant
= false;
16578 else if (attr
!= nullptr)
16580 /* This DW_AT_string_length just contains the length with no
16581 indirection. There's no need to create a dynamic property in this
16582 case. Pass 0 for the default value as we know it will not be
16583 returned in this case. */
16584 length
= attr
->constant_value (0);
16586 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16588 /* We don't currently support non-constant byte sizes for strings. */
16589 length
= attr
->constant_value (1);
16593 /* Use 1 as a fallback length if we have nothing else. */
16597 index_type
= objfile_type (objfile
)->builtin_int
;
16598 if (length_is_constant
)
16599 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16602 struct dynamic_prop low_bound
;
16604 low_bound
.kind
= PROP_CONST
;
16605 low_bound
.data
.const_val
= 1;
16606 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16608 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16609 type
= create_string_type (NULL
, char_type
, range_type
);
16611 return set_die_type (die
, type
, cu
);
16614 /* Assuming that DIE corresponds to a function, returns nonzero
16615 if the function is prototyped. */
16618 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16620 struct attribute
*attr
;
16622 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16623 if (attr
&& (DW_UNSND (attr
) != 0))
16626 /* The DWARF standard implies that the DW_AT_prototyped attribute
16627 is only meaningful for C, but the concept also extends to other
16628 languages that allow unprototyped functions (Eg: Objective C).
16629 For all other languages, assume that functions are always
16631 if (cu
->language
!= language_c
16632 && cu
->language
!= language_objc
16633 && cu
->language
!= language_opencl
)
16636 /* RealView does not emit DW_AT_prototyped. We can not distinguish
16637 prototyped and unprototyped functions; default to prototyped,
16638 since that is more common in modern code (and RealView warns
16639 about unprototyped functions). */
16640 if (producer_is_realview (cu
->producer
))
16646 /* Handle DIES due to C code like:
16650 int (*funcp)(int a, long l);
16654 ('funcp' generates a DW_TAG_subroutine_type DIE). */
16656 static struct type
*
16657 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16659 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16660 struct type
*type
; /* Type that this function returns. */
16661 struct type
*ftype
; /* Function that returns above type. */
16662 struct attribute
*attr
;
16664 type
= die_type (die
, cu
);
16666 /* The die_type call above may have already set the type for this DIE. */
16667 ftype
= get_die_type (die
, cu
);
16671 ftype
= lookup_function_type (type
);
16673 if (prototyped_function_p (die
, cu
))
16674 TYPE_PROTOTYPED (ftype
) = 1;
16676 /* Store the calling convention in the type if it's available in
16677 the subroutine die. Otherwise set the calling convention to
16678 the default value DW_CC_normal. */
16679 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16680 if (attr
!= nullptr
16681 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
16682 TYPE_CALLING_CONVENTION (ftype
)
16683 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
16684 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
16685 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
16687 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
16689 /* Record whether the function returns normally to its caller or not
16690 if the DWARF producer set that information. */
16691 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
16692 if (attr
&& (DW_UNSND (attr
) != 0))
16693 TYPE_NO_RETURN (ftype
) = 1;
16695 /* We need to add the subroutine type to the die immediately so
16696 we don't infinitely recurse when dealing with parameters
16697 declared as the same subroutine type. */
16698 set_die_type (die
, ftype
, cu
);
16700 if (die
->child
!= NULL
)
16702 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
16703 struct die_info
*child_die
;
16704 int nparams
, iparams
;
16706 /* Count the number of parameters.
16707 FIXME: GDB currently ignores vararg functions, but knows about
16708 vararg member functions. */
16710 child_die
= die
->child
;
16711 while (child_die
&& child_die
->tag
)
16713 if (child_die
->tag
== DW_TAG_formal_parameter
)
16715 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
16716 TYPE_VARARGS (ftype
) = 1;
16717 child_die
= child_die
->sibling
;
16720 /* Allocate storage for parameters and fill them in. */
16721 TYPE_NFIELDS (ftype
) = nparams
;
16722 TYPE_FIELDS (ftype
) = (struct field
*)
16723 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
16725 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
16726 even if we error out during the parameters reading below. */
16727 for (iparams
= 0; iparams
< nparams
; iparams
++)
16728 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
16731 child_die
= die
->child
;
16732 while (child_die
&& child_die
->tag
)
16734 if (child_die
->tag
== DW_TAG_formal_parameter
)
16736 struct type
*arg_type
;
16738 /* DWARF version 2 has no clean way to discern C++
16739 static and non-static member functions. G++ helps
16740 GDB by marking the first parameter for non-static
16741 member functions (which is the this pointer) as
16742 artificial. We pass this information to
16743 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
16745 DWARF version 3 added DW_AT_object_pointer, which GCC
16746 4.5 does not yet generate. */
16747 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
16748 if (attr
!= nullptr)
16749 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
16751 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
16752 arg_type
= die_type (child_die
, cu
);
16754 /* RealView does not mark THIS as const, which the testsuite
16755 expects. GCC marks THIS as const in method definitions,
16756 but not in the class specifications (GCC PR 43053). */
16757 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
16758 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
16761 struct dwarf2_cu
*arg_cu
= cu
;
16762 const char *name
= dwarf2_name (child_die
, cu
);
16764 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
16765 if (attr
!= nullptr)
16767 /* If the compiler emits this, use it. */
16768 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
16771 else if (name
&& strcmp (name
, "this") == 0)
16772 /* Function definitions will have the argument names. */
16774 else if (name
== NULL
&& iparams
== 0)
16775 /* Declarations may not have the names, so like
16776 elsewhere in GDB, assume an artificial first
16777 argument is "this". */
16781 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
16785 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
16788 child_die
= child_die
->sibling
;
16795 static struct type
*
16796 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
16798 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16799 const char *name
= NULL
;
16800 struct type
*this_type
, *target_type
;
16802 name
= dwarf2_full_name (NULL
, die
, cu
);
16803 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
16804 TYPE_TARGET_STUB (this_type
) = 1;
16805 set_die_type (die
, this_type
, cu
);
16806 target_type
= die_type (die
, cu
);
16807 if (target_type
!= this_type
)
16808 TYPE_TARGET_TYPE (this_type
) = target_type
;
16811 /* Self-referential typedefs are, it seems, not allowed by the DWARF
16812 spec and cause infinite loops in GDB. */
16813 complaint (_("Self-referential DW_TAG_typedef "
16814 "- DIE at %s [in module %s]"),
16815 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
16816 TYPE_TARGET_TYPE (this_type
) = NULL
;
16820 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
16821 anonymous typedefs, which is, strictly speaking, invalid DWARF.
16822 Handle these by just returning the target type, rather than
16823 constructing an anonymous typedef type and trying to handle this
16825 set_die_type (die
, target_type
, cu
);
16826 return target_type
;
16831 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
16832 (which may be different from NAME) to the architecture back-end to allow
16833 it to guess the correct format if necessary. */
16835 static struct type
*
16836 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
16837 const char *name_hint
, enum bfd_endian byte_order
)
16839 struct gdbarch
*gdbarch
= objfile
->arch ();
16840 const struct floatformat
**format
;
16843 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
16845 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
16847 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
16852 /* Allocate an integer type of size BITS and name NAME. */
16854 static struct type
*
16855 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
16856 int bits
, int unsigned_p
, const char *name
)
16860 /* Versions of Intel's C Compiler generate an integer type called "void"
16861 instead of using DW_TAG_unspecified_type. This has been seen on
16862 at least versions 14, 17, and 18. */
16863 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
16864 && strcmp (name
, "void") == 0)
16865 type
= objfile_type (objfile
)->builtin_void
;
16867 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
16872 /* Initialise and return a floating point type of size BITS suitable for
16873 use as a component of a complex number. The NAME_HINT is passed through
16874 when initialising the floating point type and is the name of the complex
16877 As DWARF doesn't currently provide an explicit name for the components
16878 of a complex number, but it can be helpful to have these components
16879 named, we try to select a suitable name based on the size of the
16881 static struct type
*
16882 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
16883 struct objfile
*objfile
,
16884 int bits
, const char *name_hint
,
16885 enum bfd_endian byte_order
)
16887 gdbarch
*gdbarch
= objfile
->arch ();
16888 struct type
*tt
= nullptr;
16890 /* Try to find a suitable floating point builtin type of size BITS.
16891 We're going to use the name of this type as the name for the complex
16892 target type that we are about to create. */
16893 switch (cu
->language
)
16895 case language_fortran
:
16899 tt
= builtin_f_type (gdbarch
)->builtin_real
;
16902 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
16904 case 96: /* The x86-32 ABI specifies 96-bit long double. */
16906 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
16914 tt
= builtin_type (gdbarch
)->builtin_float
;
16917 tt
= builtin_type (gdbarch
)->builtin_double
;
16919 case 96: /* The x86-32 ABI specifies 96-bit long double. */
16921 tt
= builtin_type (gdbarch
)->builtin_long_double
;
16927 /* If the type we found doesn't match the size we were looking for, then
16928 pretend we didn't find a type at all, the complex target type we
16929 create will then be nameless. */
16930 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
16933 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
16934 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
16937 /* Find a representation of a given base type and install
16938 it in the TYPE field of the die. */
16940 static struct type
*
16941 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16943 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16945 struct attribute
*attr
;
16946 int encoding
= 0, bits
= 0;
16950 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
16951 if (attr
!= nullptr)
16952 encoding
= DW_UNSND (attr
);
16953 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16954 if (attr
!= nullptr)
16955 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
16956 name
= dwarf2_name (die
, cu
);
16958 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
16960 arch
= objfile
->arch ();
16961 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
16963 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
16966 int endianity
= DW_UNSND (attr
);
16971 byte_order
= BFD_ENDIAN_BIG
;
16973 case DW_END_little
:
16974 byte_order
= BFD_ENDIAN_LITTLE
;
16977 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
16984 case DW_ATE_address
:
16985 /* Turn DW_ATE_address into a void * pointer. */
16986 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
16987 type
= init_pointer_type (objfile
, bits
, name
, type
);
16989 case DW_ATE_boolean
:
16990 type
= init_boolean_type (objfile
, bits
, 1, name
);
16992 case DW_ATE_complex_float
:
16993 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
16995 if (TYPE_CODE (type
) == TYPE_CODE_ERROR
)
16997 if (name
== nullptr)
16999 struct obstack
*obstack
17000 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17001 name
= obconcat (obstack
, "_Complex ", TYPE_NAME (type
),
17004 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17007 type
= init_complex_type (name
, type
);
17009 case DW_ATE_decimal_float
:
17010 type
= init_decfloat_type (objfile
, bits
, name
);
17013 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17015 case DW_ATE_signed
:
17016 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17018 case DW_ATE_unsigned
:
17019 if (cu
->language
== language_fortran
17021 && startswith (name
, "character("))
17022 type
= init_character_type (objfile
, bits
, 1, name
);
17024 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17026 case DW_ATE_signed_char
:
17027 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17028 || cu
->language
== language_pascal
17029 || cu
->language
== language_fortran
)
17030 type
= init_character_type (objfile
, bits
, 0, name
);
17032 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17034 case DW_ATE_unsigned_char
:
17035 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17036 || cu
->language
== language_pascal
17037 || cu
->language
== language_fortran
17038 || cu
->language
== language_rust
)
17039 type
= init_character_type (objfile
, bits
, 1, name
);
17041 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17046 type
= builtin_type (arch
)->builtin_char16
;
17047 else if (bits
== 32)
17048 type
= builtin_type (arch
)->builtin_char32
;
17051 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17053 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17055 return set_die_type (die
, type
, cu
);
17060 complaint (_("unsupported DW_AT_encoding: '%s'"),
17061 dwarf_type_encoding_name (encoding
));
17062 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17066 if (name
&& strcmp (name
, "char") == 0)
17067 TYPE_NOSIGN (type
) = 1;
17069 maybe_set_alignment (cu
, die
, type
);
17071 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17073 return set_die_type (die
, type
, cu
);
17076 /* Parse dwarf attribute if it's a block, reference or constant and put the
17077 resulting value of the attribute into struct bound_prop.
17078 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17081 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17082 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17083 struct type
*default_type
)
17085 struct dwarf2_property_baton
*baton
;
17086 struct obstack
*obstack
17087 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17089 gdb_assert (default_type
!= NULL
);
17091 if (attr
== NULL
|| prop
== NULL
)
17094 if (attr
->form_is_block ())
17096 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17097 baton
->property_type
= default_type
;
17098 baton
->locexpr
.per_cu
= cu
->per_cu
;
17099 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17100 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17101 switch (attr
->name
)
17103 case DW_AT_string_length
:
17104 baton
->locexpr
.is_reference
= true;
17107 baton
->locexpr
.is_reference
= false;
17110 prop
->data
.baton
= baton
;
17111 prop
->kind
= PROP_LOCEXPR
;
17112 gdb_assert (prop
->data
.baton
!= NULL
);
17114 else if (attr
->form_is_ref ())
17116 struct dwarf2_cu
*target_cu
= cu
;
17117 struct die_info
*target_die
;
17118 struct attribute
*target_attr
;
17120 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17121 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17122 if (target_attr
== NULL
)
17123 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17125 if (target_attr
== NULL
)
17128 switch (target_attr
->name
)
17130 case DW_AT_location
:
17131 if (target_attr
->form_is_section_offset ())
17133 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17134 baton
->property_type
= die_type (target_die
, target_cu
);
17135 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17136 prop
->data
.baton
= baton
;
17137 prop
->kind
= PROP_LOCLIST
;
17138 gdb_assert (prop
->data
.baton
!= NULL
);
17140 else if (target_attr
->form_is_block ())
17142 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17143 baton
->property_type
= die_type (target_die
, target_cu
);
17144 baton
->locexpr
.per_cu
= cu
->per_cu
;
17145 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17146 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17147 baton
->locexpr
.is_reference
= true;
17148 prop
->data
.baton
= baton
;
17149 prop
->kind
= PROP_LOCEXPR
;
17150 gdb_assert (prop
->data
.baton
!= NULL
);
17154 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17155 "dynamic property");
17159 case DW_AT_data_member_location
:
17163 if (!handle_data_member_location (target_die
, target_cu
,
17167 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17168 baton
->property_type
= read_type_die (target_die
->parent
,
17170 baton
->offset_info
.offset
= offset
;
17171 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17172 prop
->data
.baton
= baton
;
17173 prop
->kind
= PROP_ADDR_OFFSET
;
17178 else if (attr
->form_is_constant ())
17180 prop
->data
.const_val
= attr
->constant_value (0);
17181 prop
->kind
= PROP_CONST
;
17185 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17186 dwarf2_name (die
, cu
));
17196 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17198 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17199 struct type
*int_type
;
17201 /* Helper macro to examine the various builtin types. */
17202 #define TRY_TYPE(F) \
17203 int_type = (unsigned_p \
17204 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17205 : objfile_type (objfile)->builtin_ ## F); \
17206 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17213 TRY_TYPE (long_long
);
17217 gdb_assert_not_reached ("unable to find suitable integer type");
17223 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17225 int addr_size
= this->addr_size ();
17226 return int_type (addr_size
, unsigned_p
);
17229 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17230 present (which is valid) then compute the default type based on the
17231 compilation units address size. */
17233 static struct type
*
17234 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17236 struct type
*index_type
= die_type (die
, cu
);
17238 /* Dwarf-2 specifications explicitly allows to create subrange types
17239 without specifying a base type.
17240 In that case, the base type must be set to the type of
17241 the lower bound, upper bound or count, in that order, if any of these
17242 three attributes references an object that has a type.
17243 If no base type is found, the Dwarf-2 specifications say that
17244 a signed integer type of size equal to the size of an address should
17246 For the following C code: `extern char gdb_int [];'
17247 GCC produces an empty range DIE.
17248 FIXME: muller/2010-05-28: Possible references to object for low bound,
17249 high bound or count are not yet handled by this code. */
17250 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17251 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17256 /* Read the given DW_AT_subrange DIE. */
17258 static struct type
*
17259 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17261 struct type
*base_type
, *orig_base_type
;
17262 struct type
*range_type
;
17263 struct attribute
*attr
;
17264 struct dynamic_prop low
, high
;
17265 int low_default_is_valid
;
17266 int high_bound_is_count
= 0;
17268 ULONGEST negative_mask
;
17270 orig_base_type
= read_subrange_index_type (die
, cu
);
17272 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17273 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17274 creating the range type, but we use the result of check_typedef
17275 when examining properties of the type. */
17276 base_type
= check_typedef (orig_base_type
);
17278 /* The die_type call above may have already set the type for this DIE. */
17279 range_type
= get_die_type (die
, cu
);
17283 low
.kind
= PROP_CONST
;
17284 high
.kind
= PROP_CONST
;
17285 high
.data
.const_val
= 0;
17287 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17288 omitting DW_AT_lower_bound. */
17289 switch (cu
->language
)
17292 case language_cplus
:
17293 low
.data
.const_val
= 0;
17294 low_default_is_valid
= 1;
17296 case language_fortran
:
17297 low
.data
.const_val
= 1;
17298 low_default_is_valid
= 1;
17301 case language_objc
:
17302 case language_rust
:
17303 low
.data
.const_val
= 0;
17304 low_default_is_valid
= (cu
->header
.version
>= 4);
17308 case language_pascal
:
17309 low
.data
.const_val
= 1;
17310 low_default_is_valid
= (cu
->header
.version
>= 4);
17313 low
.data
.const_val
= 0;
17314 low_default_is_valid
= 0;
17318 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17319 if (attr
!= nullptr)
17320 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17321 else if (!low_default_is_valid
)
17322 complaint (_("Missing DW_AT_lower_bound "
17323 "- DIE at %s [in module %s]"),
17324 sect_offset_str (die
->sect_off
),
17325 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17327 struct attribute
*attr_ub
, *attr_count
;
17328 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17329 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17331 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17332 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17334 /* If bounds are constant do the final calculation here. */
17335 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17336 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17338 high_bound_is_count
= 1;
17342 if (attr_ub
!= NULL
)
17343 complaint (_("Unresolved DW_AT_upper_bound "
17344 "- DIE at %s [in module %s]"),
17345 sect_offset_str (die
->sect_off
),
17346 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17347 if (attr_count
!= NULL
)
17348 complaint (_("Unresolved DW_AT_count "
17349 "- DIE at %s [in module %s]"),
17350 sect_offset_str (die
->sect_off
),
17351 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17356 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17357 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17358 bias
= bias_attr
->constant_value (0);
17360 /* Normally, the DWARF producers are expected to use a signed
17361 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17362 But this is unfortunately not always the case, as witnessed
17363 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17364 is used instead. To work around that ambiguity, we treat
17365 the bounds as signed, and thus sign-extend their values, when
17366 the base type is signed. */
17368 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17369 if (low
.kind
== PROP_CONST
17370 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17371 low
.data
.const_val
|= negative_mask
;
17372 if (high
.kind
== PROP_CONST
17373 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17374 high
.data
.const_val
|= negative_mask
;
17376 /* Check for bit and byte strides. */
17377 struct dynamic_prop byte_stride_prop
;
17378 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17379 if (attr_byte_stride
!= nullptr)
17381 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17382 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17386 struct dynamic_prop bit_stride_prop
;
17387 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17388 if (attr_bit_stride
!= nullptr)
17390 /* It only makes sense to have either a bit or byte stride. */
17391 if (attr_byte_stride
!= nullptr)
17393 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17394 "- DIE at %s [in module %s]"),
17395 sect_offset_str (die
->sect_off
),
17396 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17397 attr_bit_stride
= nullptr;
17401 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17402 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17407 if (attr_byte_stride
!= nullptr
17408 || attr_bit_stride
!= nullptr)
17410 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17411 struct dynamic_prop
*stride
17412 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17415 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17416 &high
, bias
, stride
, byte_stride_p
);
17419 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17421 if (high_bound_is_count
)
17422 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17424 /* Ada expects an empty array on no boundary attributes. */
17425 if (attr
== NULL
&& cu
->language
!= language_ada
)
17426 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17428 name
= dwarf2_name (die
, cu
);
17430 TYPE_NAME (range_type
) = name
;
17432 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17433 if (attr
!= nullptr)
17434 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17436 maybe_set_alignment (cu
, die
, range_type
);
17438 set_die_type (die
, range_type
, cu
);
17440 /* set_die_type should be already done. */
17441 set_descriptive_type (range_type
, die
, cu
);
17446 static struct type
*
17447 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17451 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17453 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17455 /* In Ada, an unspecified type is typically used when the description
17456 of the type is deferred to a different unit. When encountering
17457 such a type, we treat it as a stub, and try to resolve it later on,
17459 if (cu
->language
== language_ada
)
17460 TYPE_STUB (type
) = 1;
17462 return set_die_type (die
, type
, cu
);
17465 /* Read a single die and all its descendents. Set the die's sibling
17466 field to NULL; set other fields in the die correctly, and set all
17467 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17468 location of the info_ptr after reading all of those dies. PARENT
17469 is the parent of the die in question. */
17471 static struct die_info
*
17472 read_die_and_children (const struct die_reader_specs
*reader
,
17473 const gdb_byte
*info_ptr
,
17474 const gdb_byte
**new_info_ptr
,
17475 struct die_info
*parent
)
17477 struct die_info
*die
;
17478 const gdb_byte
*cur_ptr
;
17480 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17483 *new_info_ptr
= cur_ptr
;
17486 store_in_ref_table (die
, reader
->cu
);
17488 if (die
->has_children
)
17489 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17493 *new_info_ptr
= cur_ptr
;
17496 die
->sibling
= NULL
;
17497 die
->parent
= parent
;
17501 /* Read a die, all of its descendents, and all of its siblings; set
17502 all of the fields of all of the dies correctly. Arguments are as
17503 in read_die_and_children. */
17505 static struct die_info
*
17506 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17507 const gdb_byte
*info_ptr
,
17508 const gdb_byte
**new_info_ptr
,
17509 struct die_info
*parent
)
17511 struct die_info
*first_die
, *last_sibling
;
17512 const gdb_byte
*cur_ptr
;
17514 cur_ptr
= info_ptr
;
17515 first_die
= last_sibling
= NULL
;
17519 struct die_info
*die
17520 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17524 *new_info_ptr
= cur_ptr
;
17531 last_sibling
->sibling
= die
;
17533 last_sibling
= die
;
17537 /* Read a die, all of its descendents, and all of its siblings; set
17538 all of the fields of all of the dies correctly. Arguments are as
17539 in read_die_and_children.
17540 This the main entry point for reading a DIE and all its children. */
17542 static struct die_info
*
17543 read_die_and_siblings (const struct die_reader_specs
*reader
,
17544 const gdb_byte
*info_ptr
,
17545 const gdb_byte
**new_info_ptr
,
17546 struct die_info
*parent
)
17548 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17549 new_info_ptr
, parent
);
17551 if (dwarf_die_debug
)
17553 fprintf_unfiltered (gdb_stdlog
,
17554 "Read die from %s@0x%x of %s:\n",
17555 reader
->die_section
->get_name (),
17556 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17557 bfd_get_filename (reader
->abfd
));
17558 dump_die (die
, dwarf_die_debug
);
17564 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17566 The caller is responsible for filling in the extra attributes
17567 and updating (*DIEP)->num_attrs.
17568 Set DIEP to point to a newly allocated die with its information,
17569 except for its child, sibling, and parent fields. */
17571 static const gdb_byte
*
17572 read_full_die_1 (const struct die_reader_specs
*reader
,
17573 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17574 int num_extra_attrs
)
17576 unsigned int abbrev_number
, bytes_read
, i
;
17577 struct abbrev_info
*abbrev
;
17578 struct die_info
*die
;
17579 struct dwarf2_cu
*cu
= reader
->cu
;
17580 bfd
*abfd
= reader
->abfd
;
17582 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17583 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17584 info_ptr
+= bytes_read
;
17585 if (!abbrev_number
)
17591 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17593 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17595 bfd_get_filename (abfd
));
17597 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17598 die
->sect_off
= sect_off
;
17599 die
->tag
= abbrev
->tag
;
17600 die
->abbrev
= abbrev_number
;
17601 die
->has_children
= abbrev
->has_children
;
17603 /* Make the result usable.
17604 The caller needs to update num_attrs after adding the extra
17606 die
->num_attrs
= abbrev
->num_attrs
;
17608 std::vector
<int> indexes_that_need_reprocess
;
17609 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17611 bool need_reprocess
;
17613 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17614 info_ptr
, &need_reprocess
);
17615 if (need_reprocess
)
17616 indexes_that_need_reprocess
.push_back (i
);
17619 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17620 if (attr
!= nullptr)
17621 cu
->str_offsets_base
= DW_UNSND (attr
);
17623 attr
= die
->attr (DW_AT_loclists_base
);
17624 if (attr
!= nullptr)
17625 cu
->loclist_base
= DW_UNSND (attr
);
17627 auto maybe_addr_base
= die
->addr_base ();
17628 if (maybe_addr_base
.has_value ())
17629 cu
->addr_base
= *maybe_addr_base
;
17630 for (int index
: indexes_that_need_reprocess
)
17631 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
17636 /* Read a die and all its attributes.
17637 Set DIEP to point to a newly allocated die with its information,
17638 except for its child, sibling, and parent fields. */
17640 static const gdb_byte
*
17641 read_full_die (const struct die_reader_specs
*reader
,
17642 struct die_info
**diep
, const gdb_byte
*info_ptr
)
17644 const gdb_byte
*result
;
17646 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
17648 if (dwarf_die_debug
)
17650 fprintf_unfiltered (gdb_stdlog
,
17651 "Read die from %s@0x%x of %s:\n",
17652 reader
->die_section
->get_name (),
17653 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17654 bfd_get_filename (reader
->abfd
));
17655 dump_die (*diep
, dwarf_die_debug
);
17662 /* Returns nonzero if TAG represents a type that we might generate a partial
17666 is_type_tag_for_partial (int tag
)
17671 /* Some types that would be reasonable to generate partial symbols for,
17672 that we don't at present. */
17673 case DW_TAG_array_type
:
17674 case DW_TAG_file_type
:
17675 case DW_TAG_ptr_to_member_type
:
17676 case DW_TAG_set_type
:
17677 case DW_TAG_string_type
:
17678 case DW_TAG_subroutine_type
:
17680 case DW_TAG_base_type
:
17681 case DW_TAG_class_type
:
17682 case DW_TAG_interface_type
:
17683 case DW_TAG_enumeration_type
:
17684 case DW_TAG_structure_type
:
17685 case DW_TAG_subrange_type
:
17686 case DW_TAG_typedef
:
17687 case DW_TAG_union_type
:
17694 /* Load all DIEs that are interesting for partial symbols into memory. */
17696 static struct partial_die_info
*
17697 load_partial_dies (const struct die_reader_specs
*reader
,
17698 const gdb_byte
*info_ptr
, int building_psymtab
)
17700 struct dwarf2_cu
*cu
= reader
->cu
;
17701 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17702 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
17703 unsigned int bytes_read
;
17704 unsigned int load_all
= 0;
17705 int nesting_level
= 1;
17710 gdb_assert (cu
->per_cu
!= NULL
);
17711 if (cu
->per_cu
->load_all_dies
)
17715 = htab_create_alloc_ex (cu
->header
.length
/ 12,
17719 &cu
->comp_unit_obstack
,
17720 hashtab_obstack_allocate
,
17721 dummy_obstack_deallocate
);
17725 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
17727 /* A NULL abbrev means the end of a series of children. */
17728 if (abbrev
== NULL
)
17730 if (--nesting_level
== 0)
17733 info_ptr
+= bytes_read
;
17734 last_die
= parent_die
;
17735 parent_die
= parent_die
->die_parent
;
17739 /* Check for template arguments. We never save these; if
17740 they're seen, we just mark the parent, and go on our way. */
17741 if (parent_die
!= NULL
17742 && cu
->language
== language_cplus
17743 && (abbrev
->tag
== DW_TAG_template_type_param
17744 || abbrev
->tag
== DW_TAG_template_value_param
))
17746 parent_die
->has_template_arguments
= 1;
17750 /* We don't need a partial DIE for the template argument. */
17751 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
17756 /* We only recurse into c++ subprograms looking for template arguments.
17757 Skip their other children. */
17759 && cu
->language
== language_cplus
17760 && parent_die
!= NULL
17761 && parent_die
->tag
== DW_TAG_subprogram
)
17763 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
17767 /* Check whether this DIE is interesting enough to save. Normally
17768 we would not be interested in members here, but there may be
17769 later variables referencing them via DW_AT_specification (for
17770 static members). */
17772 && !is_type_tag_for_partial (abbrev
->tag
)
17773 && abbrev
->tag
!= DW_TAG_constant
17774 && abbrev
->tag
!= DW_TAG_enumerator
17775 && abbrev
->tag
!= DW_TAG_subprogram
17776 && abbrev
->tag
!= DW_TAG_inlined_subroutine
17777 && abbrev
->tag
!= DW_TAG_lexical_block
17778 && abbrev
->tag
!= DW_TAG_variable
17779 && abbrev
->tag
!= DW_TAG_namespace
17780 && abbrev
->tag
!= DW_TAG_module
17781 && abbrev
->tag
!= DW_TAG_member
17782 && abbrev
->tag
!= DW_TAG_imported_unit
17783 && abbrev
->tag
!= DW_TAG_imported_declaration
)
17785 /* Otherwise we skip to the next sibling, if any. */
17786 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
17790 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
17793 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
17795 /* This two-pass algorithm for processing partial symbols has a
17796 high cost in cache pressure. Thus, handle some simple cases
17797 here which cover the majority of C partial symbols. DIEs
17798 which neither have specification tags in them, nor could have
17799 specification tags elsewhere pointing at them, can simply be
17800 processed and discarded.
17802 This segment is also optional; scan_partial_symbols and
17803 add_partial_symbol will handle these DIEs if we chain
17804 them in normally. When compilers which do not emit large
17805 quantities of duplicate debug information are more common,
17806 this code can probably be removed. */
17808 /* Any complete simple types at the top level (pretty much all
17809 of them, for a language without namespaces), can be processed
17811 if (parent_die
== NULL
17812 && pdi
.has_specification
== 0
17813 && pdi
.is_declaration
== 0
17814 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
17815 || pdi
.tag
== DW_TAG_base_type
17816 || pdi
.tag
== DW_TAG_subrange_type
))
17818 if (building_psymtab
&& pdi
.name
!= NULL
)
17819 add_psymbol_to_list (pdi
.name
, false,
17820 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
17821 psymbol_placement::STATIC
,
17822 0, cu
->language
, objfile
);
17823 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
17827 /* The exception for DW_TAG_typedef with has_children above is
17828 a workaround of GCC PR debug/47510. In the case of this complaint
17829 type_name_or_error will error on such types later.
17831 GDB skipped children of DW_TAG_typedef by the shortcut above and then
17832 it could not find the child DIEs referenced later, this is checked
17833 above. In correct DWARF DW_TAG_typedef should have no children. */
17835 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
17836 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
17837 "- DIE at %s [in module %s]"),
17838 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
17840 /* If we're at the second level, and we're an enumerator, and
17841 our parent has no specification (meaning possibly lives in a
17842 namespace elsewhere), then we can add the partial symbol now
17843 instead of queueing it. */
17844 if (pdi
.tag
== DW_TAG_enumerator
17845 && parent_die
!= NULL
17846 && parent_die
->die_parent
== NULL
17847 && parent_die
->tag
== DW_TAG_enumeration_type
17848 && parent_die
->has_specification
== 0)
17850 if (pdi
.name
== NULL
)
17851 complaint (_("malformed enumerator DIE ignored"));
17852 else if (building_psymtab
)
17853 add_psymbol_to_list (pdi
.name
, false,
17854 VAR_DOMAIN
, LOC_CONST
, -1,
17855 cu
->language
== language_cplus
17856 ? psymbol_placement::GLOBAL
17857 : psymbol_placement::STATIC
,
17858 0, cu
->language
, objfile
);
17860 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
17864 struct partial_die_info
*part_die
17865 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
17867 /* We'll save this DIE so link it in. */
17868 part_die
->die_parent
= parent_die
;
17869 part_die
->die_sibling
= NULL
;
17870 part_die
->die_child
= NULL
;
17872 if (last_die
&& last_die
== parent_die
)
17873 last_die
->die_child
= part_die
;
17875 last_die
->die_sibling
= part_die
;
17877 last_die
= part_die
;
17879 if (first_die
== NULL
)
17880 first_die
= part_die
;
17882 /* Maybe add the DIE to the hash table. Not all DIEs that we
17883 find interesting need to be in the hash table, because we
17884 also have the parent/sibling/child chains; only those that we
17885 might refer to by offset later during partial symbol reading.
17887 For now this means things that might have be the target of a
17888 DW_AT_specification, DW_AT_abstract_origin, or
17889 DW_AT_extension. DW_AT_extension will refer only to
17890 namespaces; DW_AT_abstract_origin refers to functions (and
17891 many things under the function DIE, but we do not recurse
17892 into function DIEs during partial symbol reading) and
17893 possibly variables as well; DW_AT_specification refers to
17894 declarations. Declarations ought to have the DW_AT_declaration
17895 flag. It happens that GCC forgets to put it in sometimes, but
17896 only for functions, not for types.
17898 Adding more things than necessary to the hash table is harmless
17899 except for the performance cost. Adding too few will result in
17900 wasted time in find_partial_die, when we reread the compilation
17901 unit with load_all_dies set. */
17904 || abbrev
->tag
== DW_TAG_constant
17905 || abbrev
->tag
== DW_TAG_subprogram
17906 || abbrev
->tag
== DW_TAG_variable
17907 || abbrev
->tag
== DW_TAG_namespace
17908 || part_die
->is_declaration
)
17912 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
17913 to_underlying (part_die
->sect_off
),
17918 /* For some DIEs we want to follow their children (if any). For C
17919 we have no reason to follow the children of structures; for other
17920 languages we have to, so that we can get at method physnames
17921 to infer fully qualified class names, for DW_AT_specification,
17922 and for C++ template arguments. For C++, we also look one level
17923 inside functions to find template arguments (if the name of the
17924 function does not already contain the template arguments).
17926 For Ada and Fortran, we need to scan the children of subprograms
17927 and lexical blocks as well because these languages allow the
17928 definition of nested entities that could be interesting for the
17929 debugger, such as nested subprograms for instance. */
17930 if (last_die
->has_children
17932 || last_die
->tag
== DW_TAG_namespace
17933 || last_die
->tag
== DW_TAG_module
17934 || last_die
->tag
== DW_TAG_enumeration_type
17935 || (cu
->language
== language_cplus
17936 && last_die
->tag
== DW_TAG_subprogram
17937 && (last_die
->name
== NULL
17938 || strchr (last_die
->name
, '<') == NULL
))
17939 || (cu
->language
!= language_c
17940 && (last_die
->tag
== DW_TAG_class_type
17941 || last_die
->tag
== DW_TAG_interface_type
17942 || last_die
->tag
== DW_TAG_structure_type
17943 || last_die
->tag
== DW_TAG_union_type
))
17944 || ((cu
->language
== language_ada
17945 || cu
->language
== language_fortran
)
17946 && (last_die
->tag
== DW_TAG_subprogram
17947 || last_die
->tag
== DW_TAG_lexical_block
))))
17950 parent_die
= last_die
;
17954 /* Otherwise we skip to the next sibling, if any. */
17955 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
17957 /* Back to the top, do it again. */
17961 partial_die_info::partial_die_info (sect_offset sect_off_
,
17962 struct abbrev_info
*abbrev
)
17963 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
17967 /* Read a minimal amount of information into the minimal die structure.
17968 INFO_PTR should point just after the initial uleb128 of a DIE. */
17971 partial_die_info::read (const struct die_reader_specs
*reader
,
17972 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
17974 struct dwarf2_cu
*cu
= reader
->cu
;
17975 struct dwarf2_per_objfile
*dwarf2_per_objfile
17976 = cu
->per_cu
->dwarf2_per_objfile
;
17978 int has_low_pc_attr
= 0;
17979 int has_high_pc_attr
= 0;
17980 int high_pc_relative
= 0;
17982 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
17985 bool need_reprocess
;
17986 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
17987 info_ptr
, &need_reprocess
);
17988 /* String and address offsets that need to do the reprocessing have
17989 already been read at this point, so there is no need to wait until
17990 the loop terminates to do the reprocessing. */
17991 if (need_reprocess
)
17992 read_attribute_reprocess (reader
, &attr
);
17993 /* Store the data if it is of an attribute we want to keep in a
17994 partial symbol table. */
18000 case DW_TAG_compile_unit
:
18001 case DW_TAG_partial_unit
:
18002 case DW_TAG_type_unit
:
18003 /* Compilation units have a DW_AT_name that is a filename, not
18004 a source language identifier. */
18005 case DW_TAG_enumeration_type
:
18006 case DW_TAG_enumerator
:
18007 /* These tags always have simple identifiers already; no need
18008 to canonicalize them. */
18009 name
= DW_STRING (&attr
);
18013 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18016 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18021 case DW_AT_linkage_name
:
18022 case DW_AT_MIPS_linkage_name
:
18023 /* Note that both forms of linkage name might appear. We
18024 assume they will be the same, and we only store the last
18026 linkage_name
= DW_STRING (&attr
);
18029 has_low_pc_attr
= 1;
18030 lowpc
= attr
.value_as_address ();
18032 case DW_AT_high_pc
:
18033 has_high_pc_attr
= 1;
18034 highpc
= attr
.value_as_address ();
18035 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18036 high_pc_relative
= 1;
18038 case DW_AT_location
:
18039 /* Support the .debug_loc offsets. */
18040 if (attr
.form_is_block ())
18042 d
.locdesc
= DW_BLOCK (&attr
);
18044 else if (attr
.form_is_section_offset ())
18046 dwarf2_complex_location_expr_complaint ();
18050 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18051 "partial symbol information");
18054 case DW_AT_external
:
18055 is_external
= DW_UNSND (&attr
);
18057 case DW_AT_declaration
:
18058 is_declaration
= DW_UNSND (&attr
);
18063 case DW_AT_abstract_origin
:
18064 case DW_AT_specification
:
18065 case DW_AT_extension
:
18066 has_specification
= 1;
18067 spec_offset
= attr
.get_ref_die_offset ();
18068 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18069 || cu
->per_cu
->is_dwz
);
18071 case DW_AT_sibling
:
18072 /* Ignore absolute siblings, they might point outside of
18073 the current compile unit. */
18074 if (attr
.form
== DW_FORM_ref_addr
)
18075 complaint (_("ignoring absolute DW_AT_sibling"));
18078 const gdb_byte
*buffer
= reader
->buffer
;
18079 sect_offset off
= attr
.get_ref_die_offset ();
18080 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18082 if (sibling_ptr
< info_ptr
)
18083 complaint (_("DW_AT_sibling points backwards"));
18084 else if (sibling_ptr
> reader
->buffer_end
)
18085 reader
->die_section
->overflow_complaint ();
18087 sibling
= sibling_ptr
;
18090 case DW_AT_byte_size
:
18093 case DW_AT_const_value
:
18094 has_const_value
= 1;
18096 case DW_AT_calling_convention
:
18097 /* DWARF doesn't provide a way to identify a program's source-level
18098 entry point. DW_AT_calling_convention attributes are only meant
18099 to describe functions' calling conventions.
18101 However, because it's a necessary piece of information in
18102 Fortran, and before DWARF 4 DW_CC_program was the only
18103 piece of debugging information whose definition refers to
18104 a 'main program' at all, several compilers marked Fortran
18105 main programs with DW_CC_program --- even when those
18106 functions use the standard calling conventions.
18108 Although DWARF now specifies a way to provide this
18109 information, we support this practice for backward
18111 if (DW_UNSND (&attr
) == DW_CC_program
18112 && cu
->language
== language_fortran
)
18113 main_subprogram
= 1;
18116 if (DW_UNSND (&attr
) == DW_INL_inlined
18117 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18118 may_be_inlined
= 1;
18122 if (tag
== DW_TAG_imported_unit
)
18124 d
.sect_off
= attr
.get_ref_die_offset ();
18125 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18126 || cu
->per_cu
->is_dwz
);
18130 case DW_AT_main_subprogram
:
18131 main_subprogram
= DW_UNSND (&attr
);
18136 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18137 but that requires a full DIE, so instead we just
18139 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18140 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18141 + (need_ranges_base
18145 /* Value of the DW_AT_ranges attribute is the offset in the
18146 .debug_ranges section. */
18147 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18158 /* For Ada, if both the name and the linkage name appear, we prefer
18159 the latter. This lets "catch exception" work better, regardless
18160 of the order in which the name and linkage name were emitted.
18161 Really, though, this is just a workaround for the fact that gdb
18162 doesn't store both the name and the linkage name. */
18163 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18164 name
= linkage_name
;
18166 if (high_pc_relative
)
18169 if (has_low_pc_attr
&& has_high_pc_attr
)
18171 /* When using the GNU linker, .gnu.linkonce. sections are used to
18172 eliminate duplicate copies of functions and vtables and such.
18173 The linker will arbitrarily choose one and discard the others.
18174 The AT_*_pc values for such functions refer to local labels in
18175 these sections. If the section from that file was discarded, the
18176 labels are not in the output, so the relocs get a value of 0.
18177 If this is a discarded function, mark the pc bounds as invalid,
18178 so that GDB will ignore it. */
18179 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18181 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18182 struct gdbarch
*gdbarch
= objfile
->arch ();
18184 complaint (_("DW_AT_low_pc %s is zero "
18185 "for DIE at %s [in module %s]"),
18186 paddress (gdbarch
, lowpc
),
18187 sect_offset_str (sect_off
),
18188 objfile_name (objfile
));
18190 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18191 else if (lowpc
>= highpc
)
18193 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18194 struct gdbarch
*gdbarch
= objfile
->arch ();
18196 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18197 "for DIE at %s [in module %s]"),
18198 paddress (gdbarch
, lowpc
),
18199 paddress (gdbarch
, highpc
),
18200 sect_offset_str (sect_off
),
18201 objfile_name (objfile
));
18210 /* Find a cached partial DIE at OFFSET in CU. */
18212 struct partial_die_info
*
18213 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18215 struct partial_die_info
*lookup_die
= NULL
;
18216 struct partial_die_info
part_die (sect_off
);
18218 lookup_die
= ((struct partial_die_info
*)
18219 htab_find_with_hash (partial_dies
, &part_die
,
18220 to_underlying (sect_off
)));
18225 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18226 except in the case of .debug_types DIEs which do not reference
18227 outside their CU (they do however referencing other types via
18228 DW_FORM_ref_sig8). */
18230 static const struct cu_partial_die_info
18231 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18233 struct dwarf2_per_objfile
*dwarf2_per_objfile
18234 = cu
->per_cu
->dwarf2_per_objfile
;
18235 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18236 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18237 struct partial_die_info
*pd
= NULL
;
18239 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18240 && cu
->header
.offset_in_cu_p (sect_off
))
18242 pd
= cu
->find_partial_die (sect_off
);
18245 /* We missed recording what we needed.
18246 Load all dies and try again. */
18247 per_cu
= cu
->per_cu
;
18251 /* TUs don't reference other CUs/TUs (except via type signatures). */
18252 if (cu
->per_cu
->is_debug_types
)
18254 error (_("Dwarf Error: Type Unit at offset %s contains"
18255 " external reference to offset %s [in module %s].\n"),
18256 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18257 bfd_get_filename (objfile
->obfd
));
18259 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18260 dwarf2_per_objfile
);
18262 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18263 load_partial_comp_unit (per_cu
);
18265 per_cu
->cu
->last_used
= 0;
18266 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18269 /* If we didn't find it, and not all dies have been loaded,
18270 load them all and try again. */
18272 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18274 per_cu
->load_all_dies
= 1;
18276 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18277 THIS_CU->cu may already be in use. So we can't just free it and
18278 replace its DIEs with the ones we read in. Instead, we leave those
18279 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18280 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18282 load_partial_comp_unit (per_cu
);
18284 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18288 internal_error (__FILE__
, __LINE__
,
18289 _("could not find partial DIE %s "
18290 "in cache [from module %s]\n"),
18291 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18292 return { per_cu
->cu
, pd
};
18295 /* See if we can figure out if the class lives in a namespace. We do
18296 this by looking for a member function; its demangled name will
18297 contain namespace info, if there is any. */
18300 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18301 struct dwarf2_cu
*cu
)
18303 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18304 what template types look like, because the demangler
18305 frequently doesn't give the same name as the debug info. We
18306 could fix this by only using the demangled name to get the
18307 prefix (but see comment in read_structure_type). */
18309 struct partial_die_info
*real_pdi
;
18310 struct partial_die_info
*child_pdi
;
18312 /* If this DIE (this DIE's specification, if any) has a parent, then
18313 we should not do this. We'll prepend the parent's fully qualified
18314 name when we create the partial symbol. */
18316 real_pdi
= struct_pdi
;
18317 while (real_pdi
->has_specification
)
18319 auto res
= find_partial_die (real_pdi
->spec_offset
,
18320 real_pdi
->spec_is_dwz
, cu
);
18321 real_pdi
= res
.pdi
;
18325 if (real_pdi
->die_parent
!= NULL
)
18328 for (child_pdi
= struct_pdi
->die_child
;
18330 child_pdi
= child_pdi
->die_sibling
)
18332 if (child_pdi
->tag
== DW_TAG_subprogram
18333 && child_pdi
->linkage_name
!= NULL
)
18335 gdb::unique_xmalloc_ptr
<char> actual_class_name
18336 (language_class_name_from_physname (cu
->language_defn
,
18337 child_pdi
->linkage_name
));
18338 if (actual_class_name
!= NULL
)
18340 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18341 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18348 /* Return true if a DIE with TAG may have the DW_AT_const_value
18352 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18356 case DW_TAG_constant
:
18357 case DW_TAG_enumerator
:
18358 case DW_TAG_formal_parameter
:
18359 case DW_TAG_template_value_param
:
18360 case DW_TAG_variable
:
18368 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18370 /* Once we've fixed up a die, there's no point in doing so again.
18371 This also avoids a memory leak if we were to call
18372 guess_partial_die_structure_name multiple times. */
18376 /* If we found a reference attribute and the DIE has no name, try
18377 to find a name in the referred to DIE. */
18379 if (name
== NULL
&& has_specification
)
18381 struct partial_die_info
*spec_die
;
18383 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18384 spec_die
= res
.pdi
;
18387 spec_die
->fixup (cu
);
18389 if (spec_die
->name
)
18391 name
= spec_die
->name
;
18393 /* Copy DW_AT_external attribute if it is set. */
18394 if (spec_die
->is_external
)
18395 is_external
= spec_die
->is_external
;
18399 if (!has_const_value
&& has_specification
18400 && can_have_DW_AT_const_value_p (tag
))
18402 struct partial_die_info
*spec_die
;
18404 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18405 spec_die
= res
.pdi
;
18408 spec_die
->fixup (cu
);
18410 if (spec_die
->has_const_value
)
18412 /* Copy DW_AT_const_value attribute if it is set. */
18413 has_const_value
= spec_die
->has_const_value
;
18417 /* Set default names for some unnamed DIEs. */
18419 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18420 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18422 /* If there is no parent die to provide a namespace, and there are
18423 children, see if we can determine the namespace from their linkage
18425 if (cu
->language
== language_cplus
18426 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18427 && die_parent
== NULL
18429 && (tag
== DW_TAG_class_type
18430 || tag
== DW_TAG_structure_type
18431 || tag
== DW_TAG_union_type
))
18432 guess_partial_die_structure_name (this, cu
);
18434 /* GCC might emit a nameless struct or union that has a linkage
18435 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18437 && (tag
== DW_TAG_class_type
18438 || tag
== DW_TAG_interface_type
18439 || tag
== DW_TAG_structure_type
18440 || tag
== DW_TAG_union_type
)
18441 && linkage_name
!= NULL
)
18443 gdb::unique_xmalloc_ptr
<char> demangled
18444 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18445 if (demangled
!= nullptr)
18449 /* Strip any leading namespaces/classes, keep only the base name.
18450 DW_AT_name for named DIEs does not contain the prefixes. */
18451 base
= strrchr (demangled
.get (), ':');
18452 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18455 base
= demangled
.get ();
18457 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18458 name
= objfile
->intern (base
);
18465 /* Read the .debug_loclists header contents from the given SECTION in the
18468 read_loclist_header (struct loclist_header
*header
,
18469 struct dwarf2_section_info
*section
)
18471 unsigned int bytes_read
;
18472 bfd
*abfd
= section
->get_bfd_owner ();
18473 const gdb_byte
*info_ptr
= section
->buffer
;
18474 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18475 info_ptr
+= bytes_read
;
18476 header
->version
= read_2_bytes (abfd
, info_ptr
);
18478 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18480 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18482 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18485 /* Return the DW_AT_loclists_base value for the CU. */
18487 lookup_loclist_base (struct dwarf2_cu
*cu
)
18489 /* For the .dwo unit, the loclist_base points to the first offset following
18490 the header. The header consists of the following entities-
18491 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18493 2. version (2 bytes)
18494 3. address size (1 byte)
18495 4. segment selector size (1 byte)
18496 5. offset entry count (4 bytes)
18497 These sizes are derived as per the DWARFv5 standard. */
18498 if (cu
->dwo_unit
!= nullptr)
18500 if (cu
->header
.initial_length_size
== 4)
18501 return LOCLIST_HEADER_SIZE32
;
18502 return LOCLIST_HEADER_SIZE64
;
18504 return cu
->loclist_base
;
18507 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18508 array of offsets in the .debug_loclists section. */
18510 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18512 struct dwarf2_per_objfile
*dwarf2_per_objfile
18513 = cu
->per_cu
->dwarf2_per_objfile
;
18514 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18515 bfd
*abfd
= objfile
->obfd
;
18516 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18517 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18519 section
->read (objfile
);
18520 if (section
->buffer
== NULL
)
18521 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18522 "section [in module %s]"), objfile_name (objfile
));
18523 struct loclist_header header
;
18524 read_loclist_header (&header
, section
);
18525 if (loclist_index
>= header
.offset_entry_count
)
18526 complaint (_("DW_FORM_loclistx pointing outside of "
18527 ".debug_loclists offset array [in module %s]"),
18528 objfile_name (objfile
));
18529 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18531 complaint (_("DW_FORM_loclistx pointing outside of "
18532 ".debug_loclists section [in module %s]"),
18533 objfile_name (objfile
));
18534 const gdb_byte
*info_ptr
18535 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18537 if (cu
->header
.offset_size
== 4)
18538 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18540 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18543 /* Process the attributes that had to be skipped in the first round. These
18544 attributes are the ones that need str_offsets_base or addr_base attributes.
18545 They could not have been processed in the first round, because at the time
18546 the values of str_offsets_base or addr_base may not have been known. */
18548 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18549 struct attribute
*attr
)
18551 struct dwarf2_cu
*cu
= reader
->cu
;
18552 switch (attr
->form
)
18554 case DW_FORM_addrx
:
18555 case DW_FORM_GNU_addr_index
:
18556 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18558 case DW_FORM_loclistx
:
18559 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18562 case DW_FORM_strx1
:
18563 case DW_FORM_strx2
:
18564 case DW_FORM_strx3
:
18565 case DW_FORM_strx4
:
18566 case DW_FORM_GNU_str_index
:
18568 unsigned int str_index
= DW_UNSND (attr
);
18569 if (reader
->dwo_file
!= NULL
)
18571 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18572 DW_STRING_IS_CANONICAL (attr
) = 0;
18576 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18577 DW_STRING_IS_CANONICAL (attr
) = 0;
18582 gdb_assert_not_reached (_("Unexpected DWARF form."));
18586 /* Read an attribute value described by an attribute form. */
18588 static const gdb_byte
*
18589 read_attribute_value (const struct die_reader_specs
*reader
,
18590 struct attribute
*attr
, unsigned form
,
18591 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18592 bool *need_reprocess
)
18594 struct dwarf2_cu
*cu
= reader
->cu
;
18595 struct dwarf2_per_objfile
*dwarf2_per_objfile
18596 = cu
->per_cu
->dwarf2_per_objfile
;
18597 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18598 bfd
*abfd
= reader
->abfd
;
18599 struct comp_unit_head
*cu_header
= &cu
->header
;
18600 unsigned int bytes_read
;
18601 struct dwarf_block
*blk
;
18602 *need_reprocess
= false;
18604 attr
->form
= (enum dwarf_form
) form
;
18607 case DW_FORM_ref_addr
:
18608 if (cu
->header
.version
== 2)
18609 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18612 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18614 info_ptr
+= bytes_read
;
18616 case DW_FORM_GNU_ref_alt
:
18617 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18618 info_ptr
+= bytes_read
;
18622 struct gdbarch
*gdbarch
= objfile
->arch ();
18623 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18624 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18625 info_ptr
+= bytes_read
;
18628 case DW_FORM_block2
:
18629 blk
= dwarf_alloc_block (cu
);
18630 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18632 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18633 info_ptr
+= blk
->size
;
18634 DW_BLOCK (attr
) = blk
;
18636 case DW_FORM_block4
:
18637 blk
= dwarf_alloc_block (cu
);
18638 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18640 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18641 info_ptr
+= blk
->size
;
18642 DW_BLOCK (attr
) = blk
;
18644 case DW_FORM_data2
:
18645 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18648 case DW_FORM_data4
:
18649 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18652 case DW_FORM_data8
:
18653 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18656 case DW_FORM_data16
:
18657 blk
= dwarf_alloc_block (cu
);
18659 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18661 DW_BLOCK (attr
) = blk
;
18663 case DW_FORM_sec_offset
:
18664 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18665 info_ptr
+= bytes_read
;
18667 case DW_FORM_loclistx
:
18669 *need_reprocess
= true;
18670 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18671 info_ptr
+= bytes_read
;
18674 case DW_FORM_string
:
18675 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18676 DW_STRING_IS_CANONICAL (attr
) = 0;
18677 info_ptr
+= bytes_read
;
18680 if (!cu
->per_cu
->is_dwz
)
18682 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18683 abfd
, info_ptr
, cu_header
,
18685 DW_STRING_IS_CANONICAL (attr
) = 0;
18686 info_ptr
+= bytes_read
;
18690 case DW_FORM_line_strp
:
18691 if (!cu
->per_cu
->is_dwz
)
18694 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
18696 DW_STRING_IS_CANONICAL (attr
) = 0;
18697 info_ptr
+= bytes_read
;
18701 case DW_FORM_GNU_strp_alt
:
18703 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18704 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
18707 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
18708 DW_STRING_IS_CANONICAL (attr
) = 0;
18709 info_ptr
+= bytes_read
;
18712 case DW_FORM_exprloc
:
18713 case DW_FORM_block
:
18714 blk
= dwarf_alloc_block (cu
);
18715 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18716 info_ptr
+= bytes_read
;
18717 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18718 info_ptr
+= blk
->size
;
18719 DW_BLOCK (attr
) = blk
;
18721 case DW_FORM_block1
:
18722 blk
= dwarf_alloc_block (cu
);
18723 blk
->size
= read_1_byte (abfd
, info_ptr
);
18725 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18726 info_ptr
+= blk
->size
;
18727 DW_BLOCK (attr
) = blk
;
18729 case DW_FORM_data1
:
18730 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18734 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18737 case DW_FORM_flag_present
:
18738 DW_UNSND (attr
) = 1;
18740 case DW_FORM_sdata
:
18741 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18742 info_ptr
+= bytes_read
;
18744 case DW_FORM_udata
:
18745 case DW_FORM_rnglistx
:
18746 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18747 info_ptr
+= bytes_read
;
18750 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18751 + read_1_byte (abfd
, info_ptr
));
18755 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18756 + read_2_bytes (abfd
, info_ptr
));
18760 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18761 + read_4_bytes (abfd
, info_ptr
));
18765 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18766 + read_8_bytes (abfd
, info_ptr
));
18769 case DW_FORM_ref_sig8
:
18770 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
18773 case DW_FORM_ref_udata
:
18774 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18775 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
18776 info_ptr
+= bytes_read
;
18778 case DW_FORM_indirect
:
18779 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18780 info_ptr
+= bytes_read
;
18781 if (form
== DW_FORM_implicit_const
)
18783 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18784 info_ptr
+= bytes_read
;
18786 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
18787 info_ptr
, need_reprocess
);
18789 case DW_FORM_implicit_const
:
18790 DW_SND (attr
) = implicit_const
;
18792 case DW_FORM_addrx
:
18793 case DW_FORM_GNU_addr_index
:
18794 *need_reprocess
= true;
18795 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18796 info_ptr
+= bytes_read
;
18799 case DW_FORM_strx1
:
18800 case DW_FORM_strx2
:
18801 case DW_FORM_strx3
:
18802 case DW_FORM_strx4
:
18803 case DW_FORM_GNU_str_index
:
18805 ULONGEST str_index
;
18806 if (form
== DW_FORM_strx1
)
18808 str_index
= read_1_byte (abfd
, info_ptr
);
18811 else if (form
== DW_FORM_strx2
)
18813 str_index
= read_2_bytes (abfd
, info_ptr
);
18816 else if (form
== DW_FORM_strx3
)
18818 str_index
= read_3_bytes (abfd
, info_ptr
);
18821 else if (form
== DW_FORM_strx4
)
18823 str_index
= read_4_bytes (abfd
, info_ptr
);
18828 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18829 info_ptr
+= bytes_read
;
18831 *need_reprocess
= true;
18832 DW_UNSND (attr
) = str_index
;
18836 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
18837 dwarf_form_name (form
),
18838 bfd_get_filename (abfd
));
18842 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
18843 attr
->form
= DW_FORM_GNU_ref_alt
;
18845 /* We have seen instances where the compiler tried to emit a byte
18846 size attribute of -1 which ended up being encoded as an unsigned
18847 0xffffffff. Although 0xffffffff is technically a valid size value,
18848 an object of this size seems pretty unlikely so we can relatively
18849 safely treat these cases as if the size attribute was invalid and
18850 treat them as zero by default. */
18851 if (attr
->name
== DW_AT_byte_size
18852 && form
== DW_FORM_data4
18853 && DW_UNSND (attr
) >= 0xffffffff)
18856 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
18857 hex_string (DW_UNSND (attr
)));
18858 DW_UNSND (attr
) = 0;
18864 /* Read an attribute described by an abbreviated attribute. */
18866 static const gdb_byte
*
18867 read_attribute (const struct die_reader_specs
*reader
,
18868 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
18869 const gdb_byte
*info_ptr
, bool *need_reprocess
)
18871 attr
->name
= abbrev
->name
;
18872 return read_attribute_value (reader
, attr
, abbrev
->form
,
18873 abbrev
->implicit_const
, info_ptr
,
18877 /* Return pointer to string at .debug_str offset STR_OFFSET. */
18879 static const char *
18880 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18881 LONGEST str_offset
)
18883 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
18884 str_offset
, "DW_FORM_strp");
18887 /* Return pointer to string at .debug_str offset as read from BUF.
18888 BUF is assumed to be in a compilation unit described by CU_HEADER.
18889 Return *BYTES_READ_PTR count of bytes read from BUF. */
18891 static const char *
18892 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
18893 const gdb_byte
*buf
,
18894 const struct comp_unit_head
*cu_header
,
18895 unsigned int *bytes_read_ptr
)
18897 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
18899 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
18905 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
18906 const struct comp_unit_head
*cu_header
,
18907 unsigned int *bytes_read_ptr
)
18909 bfd
*abfd
= objfile
->obfd
;
18910 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
18912 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
18915 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
18916 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
18917 ADDR_SIZE is the size of addresses from the CU header. */
18920 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18921 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
18924 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18925 bfd
*abfd
= objfile
->obfd
;
18926 const gdb_byte
*info_ptr
;
18927 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
18929 dwarf2_per_objfile
->addr
.read (objfile
);
18930 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
18931 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
18932 objfile_name (objfile
));
18933 if (addr_base_or_zero
+ addr_index
* addr_size
18934 >= dwarf2_per_objfile
->addr
.size
)
18935 error (_("DW_FORM_addr_index pointing outside of "
18936 ".debug_addr section [in module %s]"),
18937 objfile_name (objfile
));
18938 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
18939 + addr_base_or_zero
+ addr_index
* addr_size
);
18940 if (addr_size
== 4)
18941 return bfd_get_32 (abfd
, info_ptr
);
18943 return bfd_get_64 (abfd
, info_ptr
);
18946 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
18949 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
18951 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
18952 cu
->addr_base
, cu
->header
.addr_size
);
18955 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
18958 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
18959 unsigned int *bytes_read
)
18961 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
18962 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
18964 return read_addr_index (cu
, addr_index
);
18970 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
18972 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
18973 struct dwarf2_cu
*cu
= per_cu
->cu
;
18974 gdb::optional
<ULONGEST
> addr_base
;
18977 /* We need addr_base and addr_size.
18978 If we don't have PER_CU->cu, we have to get it.
18979 Nasty, but the alternative is storing the needed info in PER_CU,
18980 which at this point doesn't seem justified: it's not clear how frequently
18981 it would get used and it would increase the size of every PER_CU.
18982 Entry points like dwarf2_per_cu_addr_size do a similar thing
18983 so we're not in uncharted territory here.
18984 Alas we need to be a bit more complicated as addr_base is contained
18987 We don't need to read the entire CU(/TU).
18988 We just need the header and top level die.
18990 IWBN to use the aging mechanism to let us lazily later discard the CU.
18991 For now we skip this optimization. */
18995 addr_base
= cu
->addr_base
;
18996 addr_size
= cu
->header
.addr_size
;
19000 cutu_reader
reader (per_cu
, NULL
, 0, false);
19001 addr_base
= reader
.cu
->addr_base
;
19002 addr_size
= reader
.cu
->header
.addr_size
;
19005 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19009 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19010 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19013 static const char *
19014 read_str_index (struct dwarf2_cu
*cu
,
19015 struct dwarf2_section_info
*str_section
,
19016 struct dwarf2_section_info
*str_offsets_section
,
19017 ULONGEST str_offsets_base
, ULONGEST str_index
)
19019 struct dwarf2_per_objfile
*dwarf2_per_objfile
19020 = cu
->per_cu
->dwarf2_per_objfile
;
19021 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19022 const char *objf_name
= objfile_name (objfile
);
19023 bfd
*abfd
= objfile
->obfd
;
19024 const gdb_byte
*info_ptr
;
19025 ULONGEST str_offset
;
19026 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19028 str_section
->read (objfile
);
19029 str_offsets_section
->read (objfile
);
19030 if (str_section
->buffer
== NULL
)
19031 error (_("%s used without %s section"
19032 " in CU at offset %s [in module %s]"),
19033 form_name
, str_section
->get_name (),
19034 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19035 if (str_offsets_section
->buffer
== NULL
)
19036 error (_("%s used without %s section"
19037 " in CU at offset %s [in module %s]"),
19038 form_name
, str_section
->get_name (),
19039 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19040 info_ptr
= (str_offsets_section
->buffer
19042 + str_index
* cu
->header
.offset_size
);
19043 if (cu
->header
.offset_size
== 4)
19044 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19046 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19047 if (str_offset
>= str_section
->size
)
19048 error (_("Offset from %s pointing outside of"
19049 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19050 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19051 return (const char *) (str_section
->buffer
+ str_offset
);
19054 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19056 static const char *
19057 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19059 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19060 ? reader
->cu
->header
.addr_size
: 0;
19061 return read_str_index (reader
->cu
,
19062 &reader
->dwo_file
->sections
.str
,
19063 &reader
->dwo_file
->sections
.str_offsets
,
19064 str_offsets_base
, str_index
);
19067 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19069 static const char *
19070 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19072 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19073 const char *objf_name
= objfile_name (objfile
);
19074 static const char form_name
[] = "DW_FORM_GNU_str_index";
19075 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19077 if (!cu
->str_offsets_base
.has_value ())
19078 error (_("%s used in Fission stub without %s"
19079 " in CU at offset 0x%lx [in module %s]"),
19080 form_name
, str_offsets_attr_name
,
19081 (long) cu
->header
.offset_size
, objf_name
);
19083 return read_str_index (cu
,
19084 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19085 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19086 *cu
->str_offsets_base
, str_index
);
19089 /* Return the length of an LEB128 number in BUF. */
19092 leb128_size (const gdb_byte
*buf
)
19094 const gdb_byte
*begin
= buf
;
19100 if ((byte
& 128) == 0)
19101 return buf
- begin
;
19106 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19115 cu
->language
= language_c
;
19118 case DW_LANG_C_plus_plus
:
19119 case DW_LANG_C_plus_plus_11
:
19120 case DW_LANG_C_plus_plus_14
:
19121 cu
->language
= language_cplus
;
19124 cu
->language
= language_d
;
19126 case DW_LANG_Fortran77
:
19127 case DW_LANG_Fortran90
:
19128 case DW_LANG_Fortran95
:
19129 case DW_LANG_Fortran03
:
19130 case DW_LANG_Fortran08
:
19131 cu
->language
= language_fortran
;
19134 cu
->language
= language_go
;
19136 case DW_LANG_Mips_Assembler
:
19137 cu
->language
= language_asm
;
19139 case DW_LANG_Ada83
:
19140 case DW_LANG_Ada95
:
19141 cu
->language
= language_ada
;
19143 case DW_LANG_Modula2
:
19144 cu
->language
= language_m2
;
19146 case DW_LANG_Pascal83
:
19147 cu
->language
= language_pascal
;
19150 cu
->language
= language_objc
;
19153 case DW_LANG_Rust_old
:
19154 cu
->language
= language_rust
;
19156 case DW_LANG_Cobol74
:
19157 case DW_LANG_Cobol85
:
19159 cu
->language
= language_minimal
;
19162 cu
->language_defn
= language_def (cu
->language
);
19165 /* Return the named attribute or NULL if not there. */
19167 static struct attribute
*
19168 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19173 struct attribute
*spec
= NULL
;
19175 for (i
= 0; i
< die
->num_attrs
; ++i
)
19177 if (die
->attrs
[i
].name
== name
)
19178 return &die
->attrs
[i
];
19179 if (die
->attrs
[i
].name
== DW_AT_specification
19180 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19181 spec
= &die
->attrs
[i
];
19187 die
= follow_die_ref (die
, spec
, &cu
);
19193 /* Return the string associated with a string-typed attribute, or NULL if it
19194 is either not found or is of an incorrect type. */
19196 static const char *
19197 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19199 struct attribute
*attr
;
19200 const char *str
= NULL
;
19202 attr
= dwarf2_attr (die
, name
, cu
);
19206 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19207 || attr
->form
== DW_FORM_string
19208 || attr
->form
== DW_FORM_strx
19209 || attr
->form
== DW_FORM_strx1
19210 || attr
->form
== DW_FORM_strx2
19211 || attr
->form
== DW_FORM_strx3
19212 || attr
->form
== DW_FORM_strx4
19213 || attr
->form
== DW_FORM_GNU_str_index
19214 || attr
->form
== DW_FORM_GNU_strp_alt
)
19215 str
= DW_STRING (attr
);
19217 complaint (_("string type expected for attribute %s for "
19218 "DIE at %s in module %s"),
19219 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19220 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19226 /* Return the dwo name or NULL if not present. If present, it is in either
19227 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19228 static const char *
19229 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19231 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19232 if (dwo_name
== nullptr)
19233 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19237 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19238 and holds a non-zero value. This function should only be used for
19239 DW_FORM_flag or DW_FORM_flag_present attributes. */
19242 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19244 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19246 return (attr
&& DW_UNSND (attr
));
19250 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19252 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19253 which value is non-zero. However, we have to be careful with
19254 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19255 (via dwarf2_flag_true_p) follows this attribute. So we may
19256 end up accidently finding a declaration attribute that belongs
19257 to a different DIE referenced by the specification attribute,
19258 even though the given DIE does not have a declaration attribute. */
19259 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19260 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19263 /* Return the die giving the specification for DIE, if there is
19264 one. *SPEC_CU is the CU containing DIE on input, and the CU
19265 containing the return value on output. If there is no
19266 specification, but there is an abstract origin, that is
19269 static struct die_info
*
19270 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19272 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19275 if (spec_attr
== NULL
)
19276 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19278 if (spec_attr
== NULL
)
19281 return follow_die_ref (die
, spec_attr
, spec_cu
);
19284 /* Stub for free_line_header to match void * callback types. */
19287 free_line_header_voidp (void *arg
)
19289 struct line_header
*lh
= (struct line_header
*) arg
;
19294 /* A convenience function to find the proper .debug_line section for a CU. */
19296 static struct dwarf2_section_info
*
19297 get_debug_line_section (struct dwarf2_cu
*cu
)
19299 struct dwarf2_section_info
*section
;
19300 struct dwarf2_per_objfile
*dwarf2_per_objfile
19301 = cu
->per_cu
->dwarf2_per_objfile
;
19303 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19305 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19306 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19307 else if (cu
->per_cu
->is_dwz
)
19309 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19311 section
= &dwz
->line
;
19314 section
= &dwarf2_per_objfile
->line
;
19319 /* Read the statement program header starting at OFFSET in
19320 .debug_line, or .debug_line.dwo. Return a pointer
19321 to a struct line_header, allocated using xmalloc.
19322 Returns NULL if there is a problem reading the header, e.g., if it
19323 has a version we don't understand.
19325 NOTE: the strings in the include directory and file name tables of
19326 the returned object point into the dwarf line section buffer,
19327 and must not be freed. */
19329 static line_header_up
19330 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19332 struct dwarf2_section_info
*section
;
19333 struct dwarf2_per_objfile
*dwarf2_per_objfile
19334 = cu
->per_cu
->dwarf2_per_objfile
;
19336 section
= get_debug_line_section (cu
);
19337 section
->read (dwarf2_per_objfile
->objfile
);
19338 if (section
->buffer
== NULL
)
19340 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19341 complaint (_("missing .debug_line.dwo section"));
19343 complaint (_("missing .debug_line section"));
19347 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19348 dwarf2_per_objfile
, section
,
19352 /* Subroutine of dwarf_decode_lines to simplify it.
19353 Return the file name of the psymtab for the given file_entry.
19354 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19355 If space for the result is malloc'd, *NAME_HOLDER will be set.
19356 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19358 static const char *
19359 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19360 const dwarf2_psymtab
*pst
,
19361 const char *comp_dir
,
19362 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19364 const char *include_name
= fe
.name
;
19365 const char *include_name_to_compare
= include_name
;
19366 const char *pst_filename
;
19369 const char *dir_name
= fe
.include_dir (lh
);
19371 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19372 if (!IS_ABSOLUTE_PATH (include_name
)
19373 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19375 /* Avoid creating a duplicate psymtab for PST.
19376 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19377 Before we do the comparison, however, we need to account
19378 for DIR_NAME and COMP_DIR.
19379 First prepend dir_name (if non-NULL). If we still don't
19380 have an absolute path prepend comp_dir (if non-NULL).
19381 However, the directory we record in the include-file's
19382 psymtab does not contain COMP_DIR (to match the
19383 corresponding symtab(s)).
19388 bash$ gcc -g ./hello.c
19389 include_name = "hello.c"
19391 DW_AT_comp_dir = comp_dir = "/tmp"
19392 DW_AT_name = "./hello.c"
19396 if (dir_name
!= NULL
)
19398 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19399 include_name
, (char *) NULL
));
19400 include_name
= name_holder
->get ();
19401 include_name_to_compare
= include_name
;
19403 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19405 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19406 include_name
, (char *) NULL
));
19407 include_name_to_compare
= hold_compare
.get ();
19411 pst_filename
= pst
->filename
;
19412 gdb::unique_xmalloc_ptr
<char> copied_name
;
19413 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19415 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19416 pst_filename
, (char *) NULL
));
19417 pst_filename
= copied_name
.get ();
19420 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19424 return include_name
;
19427 /* State machine to track the state of the line number program. */
19429 class lnp_state_machine
19432 /* Initialize a machine state for the start of a line number
19434 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19435 bool record_lines_p
);
19437 file_entry
*current_file ()
19439 /* lh->file_names is 0-based, but the file name numbers in the
19440 statement program are 1-based. */
19441 return m_line_header
->file_name_at (m_file
);
19444 /* Record the line in the state machine. END_SEQUENCE is true if
19445 we're processing the end of a sequence. */
19446 void record_line (bool end_sequence
);
19448 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19449 nop-out rest of the lines in this sequence. */
19450 void check_line_address (struct dwarf2_cu
*cu
,
19451 const gdb_byte
*line_ptr
,
19452 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19454 void handle_set_discriminator (unsigned int discriminator
)
19456 m_discriminator
= discriminator
;
19457 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19460 /* Handle DW_LNE_set_address. */
19461 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19464 address
+= baseaddr
;
19465 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19468 /* Handle DW_LNS_advance_pc. */
19469 void handle_advance_pc (CORE_ADDR adjust
);
19471 /* Handle a special opcode. */
19472 void handle_special_opcode (unsigned char op_code
);
19474 /* Handle DW_LNS_advance_line. */
19475 void handle_advance_line (int line_delta
)
19477 advance_line (line_delta
);
19480 /* Handle DW_LNS_set_file. */
19481 void handle_set_file (file_name_index file
);
19483 /* Handle DW_LNS_negate_stmt. */
19484 void handle_negate_stmt ()
19486 m_is_stmt
= !m_is_stmt
;
19489 /* Handle DW_LNS_const_add_pc. */
19490 void handle_const_add_pc ();
19492 /* Handle DW_LNS_fixed_advance_pc. */
19493 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19495 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19499 /* Handle DW_LNS_copy. */
19500 void handle_copy ()
19502 record_line (false);
19503 m_discriminator
= 0;
19506 /* Handle DW_LNE_end_sequence. */
19507 void handle_end_sequence ()
19509 m_currently_recording_lines
= true;
19513 /* Advance the line by LINE_DELTA. */
19514 void advance_line (int line_delta
)
19516 m_line
+= line_delta
;
19518 if (line_delta
!= 0)
19519 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19522 struct dwarf2_cu
*m_cu
;
19524 gdbarch
*m_gdbarch
;
19526 /* True if we're recording lines.
19527 Otherwise we're building partial symtabs and are just interested in
19528 finding include files mentioned by the line number program. */
19529 bool m_record_lines_p
;
19531 /* The line number header. */
19532 line_header
*m_line_header
;
19534 /* These are part of the standard DWARF line number state machine,
19535 and initialized according to the DWARF spec. */
19537 unsigned char m_op_index
= 0;
19538 /* The line table index of the current file. */
19539 file_name_index m_file
= 1;
19540 unsigned int m_line
= 1;
19542 /* These are initialized in the constructor. */
19544 CORE_ADDR m_address
;
19546 unsigned int m_discriminator
;
19548 /* Additional bits of state we need to track. */
19550 /* The last file that we called dwarf2_start_subfile for.
19551 This is only used for TLLs. */
19552 unsigned int m_last_file
= 0;
19553 /* The last file a line number was recorded for. */
19554 struct subfile
*m_last_subfile
= NULL
;
19556 /* When true, record the lines we decode. */
19557 bool m_currently_recording_lines
= false;
19559 /* The last line number that was recorded, used to coalesce
19560 consecutive entries for the same line. This can happen, for
19561 example, when discriminators are present. PR 17276. */
19562 unsigned int m_last_line
= 0;
19563 bool m_line_has_non_zero_discriminator
= false;
19567 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19569 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19570 / m_line_header
->maximum_ops_per_instruction
)
19571 * m_line_header
->minimum_instruction_length
);
19572 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19573 m_op_index
= ((m_op_index
+ adjust
)
19574 % m_line_header
->maximum_ops_per_instruction
);
19578 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19580 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19581 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19582 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19583 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19584 / m_line_header
->maximum_ops_per_instruction
)
19585 * m_line_header
->minimum_instruction_length
);
19586 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19587 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19588 % m_line_header
->maximum_ops_per_instruction
);
19590 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19591 advance_line (line_delta
);
19592 record_line (false);
19593 m_discriminator
= 0;
19597 lnp_state_machine::handle_set_file (file_name_index file
)
19601 const file_entry
*fe
= current_file ();
19603 dwarf2_debug_line_missing_file_complaint ();
19604 else if (m_record_lines_p
)
19606 const char *dir
= fe
->include_dir (m_line_header
);
19608 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19609 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19610 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19615 lnp_state_machine::handle_const_add_pc ()
19618 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19621 = (((m_op_index
+ adjust
)
19622 / m_line_header
->maximum_ops_per_instruction
)
19623 * m_line_header
->minimum_instruction_length
);
19625 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19626 m_op_index
= ((m_op_index
+ adjust
)
19627 % m_line_header
->maximum_ops_per_instruction
);
19630 /* Return non-zero if we should add LINE to the line number table.
19631 LINE is the line to add, LAST_LINE is the last line that was added,
19632 LAST_SUBFILE is the subfile for LAST_LINE.
19633 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19634 had a non-zero discriminator.
19636 We have to be careful in the presence of discriminators.
19637 E.g., for this line:
19639 for (i = 0; i < 100000; i++);
19641 clang can emit four line number entries for that one line,
19642 each with a different discriminator.
19643 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19645 However, we want gdb to coalesce all four entries into one.
19646 Otherwise the user could stepi into the middle of the line and
19647 gdb would get confused about whether the pc really was in the
19648 middle of the line.
19650 Things are further complicated by the fact that two consecutive
19651 line number entries for the same line is a heuristic used by gcc
19652 to denote the end of the prologue. So we can't just discard duplicate
19653 entries, we have to be selective about it. The heuristic we use is
19654 that we only collapse consecutive entries for the same line if at least
19655 one of those entries has a non-zero discriminator. PR 17276.
19657 Note: Addresses in the line number state machine can never go backwards
19658 within one sequence, thus this coalescing is ok. */
19661 dwarf_record_line_p (struct dwarf2_cu
*cu
,
19662 unsigned int line
, unsigned int last_line
,
19663 int line_has_non_zero_discriminator
,
19664 struct subfile
*last_subfile
)
19666 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
19668 if (line
!= last_line
)
19670 /* Same line for the same file that we've seen already.
19671 As a last check, for pr 17276, only record the line if the line
19672 has never had a non-zero discriminator. */
19673 if (!line_has_non_zero_discriminator
)
19678 /* Use the CU's builder to record line number LINE beginning at
19679 address ADDRESS in the line table of subfile SUBFILE. */
19682 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19683 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
19684 struct dwarf2_cu
*cu
)
19686 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19688 if (dwarf_line_debug
)
19690 fprintf_unfiltered (gdb_stdlog
,
19691 "Recording line %u, file %s, address %s\n",
19692 line
, lbasename (subfile
->name
),
19693 paddress (gdbarch
, address
));
19697 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
19700 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19701 Mark the end of a set of line number records.
19702 The arguments are the same as for dwarf_record_line_1.
19703 If SUBFILE is NULL the request is ignored. */
19706 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19707 CORE_ADDR address
, struct dwarf2_cu
*cu
)
19709 if (subfile
== NULL
)
19712 if (dwarf_line_debug
)
19714 fprintf_unfiltered (gdb_stdlog
,
19715 "Finishing current line, file %s, address %s\n",
19716 lbasename (subfile
->name
),
19717 paddress (gdbarch
, address
));
19720 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
19724 lnp_state_machine::record_line (bool end_sequence
)
19726 if (dwarf_line_debug
)
19728 fprintf_unfiltered (gdb_stdlog
,
19729 "Processing actual line %u: file %u,"
19730 " address %s, is_stmt %u, discrim %u%s\n",
19732 paddress (m_gdbarch
, m_address
),
19733 m_is_stmt
, m_discriminator
,
19734 (end_sequence
? "\t(end sequence)" : ""));
19737 file_entry
*fe
= current_file ();
19740 dwarf2_debug_line_missing_file_complaint ();
19741 /* For now we ignore lines not starting on an instruction boundary.
19742 But not when processing end_sequence for compatibility with the
19743 previous version of the code. */
19744 else if (m_op_index
== 0 || end_sequence
)
19746 fe
->included_p
= 1;
19747 if (m_record_lines_p
)
19749 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
19752 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
19753 m_currently_recording_lines
? m_cu
: nullptr);
19758 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
19760 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
19761 m_line_has_non_zero_discriminator
,
19764 buildsym_compunit
*builder
= m_cu
->get_builder ();
19765 dwarf_record_line_1 (m_gdbarch
,
19766 builder
->get_current_subfile (),
19767 m_line
, m_address
, is_stmt
,
19768 m_currently_recording_lines
? m_cu
: nullptr);
19770 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19771 m_last_line
= m_line
;
19777 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
19778 line_header
*lh
, bool record_lines_p
)
19782 m_record_lines_p
= record_lines_p
;
19783 m_line_header
= lh
;
19785 m_currently_recording_lines
= true;
19787 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
19788 was a line entry for it so that the backend has a chance to adjust it
19789 and also record it in case it needs it. This is currently used by MIPS
19790 code, cf. `mips_adjust_dwarf2_line'. */
19791 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
19792 m_is_stmt
= lh
->default_is_stmt
;
19793 m_discriminator
= 0;
19797 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
19798 const gdb_byte
*line_ptr
,
19799 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
19801 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
19802 the pc range of the CU. However, we restrict the test to only ADDRESS
19803 values of zero to preserve GDB's previous behaviour which is to handle
19804 the specific case of a function being GC'd by the linker. */
19806 if (address
== 0 && address
< unrelocated_lowpc
)
19808 /* This line table is for a function which has been
19809 GCd by the linker. Ignore it. PR gdb/12528 */
19811 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19812 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
19814 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
19815 line_offset
, objfile_name (objfile
));
19816 m_currently_recording_lines
= false;
19817 /* Note: m_currently_recording_lines is left as false until we see
19818 DW_LNE_end_sequence. */
19822 /* Subroutine of dwarf_decode_lines to simplify it.
19823 Process the line number information in LH.
19824 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
19825 program in order to set included_p for every referenced header. */
19828 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
19829 const int decode_for_pst_p
, CORE_ADDR lowpc
)
19831 const gdb_byte
*line_ptr
, *extended_end
;
19832 const gdb_byte
*line_end
;
19833 unsigned int bytes_read
, extended_len
;
19834 unsigned char op_code
, extended_op
;
19835 CORE_ADDR baseaddr
;
19836 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19837 bfd
*abfd
= objfile
->obfd
;
19838 struct gdbarch
*gdbarch
= objfile
->arch ();
19839 /* True if we're recording line info (as opposed to building partial
19840 symtabs and just interested in finding include files mentioned by
19841 the line number program). */
19842 bool record_lines_p
= !decode_for_pst_p
;
19844 baseaddr
= objfile
->text_section_offset ();
19846 line_ptr
= lh
->statement_program_start
;
19847 line_end
= lh
->statement_program_end
;
19849 /* Read the statement sequences until there's nothing left. */
19850 while (line_ptr
< line_end
)
19852 /* The DWARF line number program state machine. Reset the state
19853 machine at the start of each sequence. */
19854 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
19855 bool end_sequence
= false;
19857 if (record_lines_p
)
19859 /* Start a subfile for the current file of the state
19861 const file_entry
*fe
= state_machine
.current_file ();
19864 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
19867 /* Decode the table. */
19868 while (line_ptr
< line_end
&& !end_sequence
)
19870 op_code
= read_1_byte (abfd
, line_ptr
);
19873 if (op_code
>= lh
->opcode_base
)
19875 /* Special opcode. */
19876 state_machine
.handle_special_opcode (op_code
);
19878 else switch (op_code
)
19880 case DW_LNS_extended_op
:
19881 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
19883 line_ptr
+= bytes_read
;
19884 extended_end
= line_ptr
+ extended_len
;
19885 extended_op
= read_1_byte (abfd
, line_ptr
);
19887 switch (extended_op
)
19889 case DW_LNE_end_sequence
:
19890 state_machine
.handle_end_sequence ();
19891 end_sequence
= true;
19893 case DW_LNE_set_address
:
19896 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
19897 line_ptr
+= bytes_read
;
19899 state_machine
.check_line_address (cu
, line_ptr
,
19900 lowpc
- baseaddr
, address
);
19901 state_machine
.handle_set_address (baseaddr
, address
);
19904 case DW_LNE_define_file
:
19906 const char *cur_file
;
19907 unsigned int mod_time
, length
;
19910 cur_file
= read_direct_string (abfd
, line_ptr
,
19912 line_ptr
+= bytes_read
;
19913 dindex
= (dir_index
)
19914 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19915 line_ptr
+= bytes_read
;
19917 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19918 line_ptr
+= bytes_read
;
19920 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19921 line_ptr
+= bytes_read
;
19922 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
19925 case DW_LNE_set_discriminator
:
19927 /* The discriminator is not interesting to the
19928 debugger; just ignore it. We still need to
19929 check its value though:
19930 if there are consecutive entries for the same
19931 (non-prologue) line we want to coalesce them.
19934 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19935 line_ptr
+= bytes_read
;
19937 state_machine
.handle_set_discriminator (discr
);
19941 complaint (_("mangled .debug_line section"));
19944 /* Make sure that we parsed the extended op correctly. If e.g.
19945 we expected a different address size than the producer used,
19946 we may have read the wrong number of bytes. */
19947 if (line_ptr
!= extended_end
)
19949 complaint (_("mangled .debug_line section"));
19954 state_machine
.handle_copy ();
19956 case DW_LNS_advance_pc
:
19959 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19960 line_ptr
+= bytes_read
;
19962 state_machine
.handle_advance_pc (adjust
);
19965 case DW_LNS_advance_line
:
19968 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
19969 line_ptr
+= bytes_read
;
19971 state_machine
.handle_advance_line (line_delta
);
19974 case DW_LNS_set_file
:
19976 file_name_index file
19977 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
19979 line_ptr
+= bytes_read
;
19981 state_machine
.handle_set_file (file
);
19984 case DW_LNS_set_column
:
19985 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19986 line_ptr
+= bytes_read
;
19988 case DW_LNS_negate_stmt
:
19989 state_machine
.handle_negate_stmt ();
19991 case DW_LNS_set_basic_block
:
19993 /* Add to the address register of the state machine the
19994 address increment value corresponding to special opcode
19995 255. I.e., this value is scaled by the minimum
19996 instruction length since special opcode 255 would have
19997 scaled the increment. */
19998 case DW_LNS_const_add_pc
:
19999 state_machine
.handle_const_add_pc ();
20001 case DW_LNS_fixed_advance_pc
:
20003 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20006 state_machine
.handle_fixed_advance_pc (addr_adj
);
20011 /* Unknown standard opcode, ignore it. */
20014 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20016 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20017 line_ptr
+= bytes_read
;
20024 dwarf2_debug_line_missing_end_sequence_complaint ();
20026 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20027 in which case we still finish recording the last line). */
20028 state_machine
.record_line (true);
20032 /* Decode the Line Number Program (LNP) for the given line_header
20033 structure and CU. The actual information extracted and the type
20034 of structures created from the LNP depends on the value of PST.
20036 1. If PST is NULL, then this procedure uses the data from the program
20037 to create all necessary symbol tables, and their linetables.
20039 2. If PST is not NULL, this procedure reads the program to determine
20040 the list of files included by the unit represented by PST, and
20041 builds all the associated partial symbol tables.
20043 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20044 It is used for relative paths in the line table.
20045 NOTE: When processing partial symtabs (pst != NULL),
20046 comp_dir == pst->dirname.
20048 NOTE: It is important that psymtabs have the same file name (via strcmp)
20049 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20050 symtab we don't use it in the name of the psymtabs we create.
20051 E.g. expand_line_sal requires this when finding psymtabs to expand.
20052 A good testcase for this is mb-inline.exp.
20054 LOWPC is the lowest address in CU (or 0 if not known).
20056 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20057 for its PC<->lines mapping information. Otherwise only the filename
20058 table is read in. */
20061 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20062 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20063 CORE_ADDR lowpc
, int decode_mapping
)
20065 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20066 const int decode_for_pst_p
= (pst
!= NULL
);
20068 if (decode_mapping
)
20069 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20071 if (decode_for_pst_p
)
20073 /* Now that we're done scanning the Line Header Program, we can
20074 create the psymtab of each included file. */
20075 for (auto &file_entry
: lh
->file_names ())
20076 if (file_entry
.included_p
== 1)
20078 gdb::unique_xmalloc_ptr
<char> name_holder
;
20079 const char *include_name
=
20080 psymtab_include_file_name (lh
, file_entry
, pst
,
20081 comp_dir
, &name_holder
);
20082 if (include_name
!= NULL
)
20083 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20088 /* Make sure a symtab is created for every file, even files
20089 which contain only variables (i.e. no code with associated
20091 buildsym_compunit
*builder
= cu
->get_builder ();
20092 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20094 for (auto &fe
: lh
->file_names ())
20096 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20097 if (builder
->get_current_subfile ()->symtab
== NULL
)
20099 builder
->get_current_subfile ()->symtab
20100 = allocate_symtab (cust
,
20101 builder
->get_current_subfile ()->name
);
20103 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20108 /* Start a subfile for DWARF. FILENAME is the name of the file and
20109 DIRNAME the name of the source directory which contains FILENAME
20110 or NULL if not known.
20111 This routine tries to keep line numbers from identical absolute and
20112 relative file names in a common subfile.
20114 Using the `list' example from the GDB testsuite, which resides in
20115 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20116 of /srcdir/list0.c yields the following debugging information for list0.c:
20118 DW_AT_name: /srcdir/list0.c
20119 DW_AT_comp_dir: /compdir
20120 files.files[0].name: list0.h
20121 files.files[0].dir: /srcdir
20122 files.files[1].name: list0.c
20123 files.files[1].dir: /srcdir
20125 The line number information for list0.c has to end up in a single
20126 subfile, so that `break /srcdir/list0.c:1' works as expected.
20127 start_subfile will ensure that this happens provided that we pass the
20128 concatenation of files.files[1].dir and files.files[1].name as the
20132 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20133 const char *dirname
)
20135 gdb::unique_xmalloc_ptr
<char> copy
;
20137 /* In order not to lose the line information directory,
20138 we concatenate it to the filename when it makes sense.
20139 Note that the Dwarf3 standard says (speaking of filenames in line
20140 information): ``The directory index is ignored for file names
20141 that represent full path names''. Thus ignoring dirname in the
20142 `else' branch below isn't an issue. */
20144 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20146 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20147 filename
= copy
.get ();
20150 cu
->get_builder ()->start_subfile (filename
);
20153 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20154 buildsym_compunit constructor. */
20156 struct compunit_symtab
*
20157 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20160 gdb_assert (m_builder
== nullptr);
20162 m_builder
.reset (new struct buildsym_compunit
20163 (per_cu
->dwarf2_per_objfile
->objfile
,
20164 name
, comp_dir
, language
, low_pc
));
20166 list_in_scope
= get_builder ()->get_file_symbols ();
20168 get_builder ()->record_debugformat ("DWARF 2");
20169 get_builder ()->record_producer (producer
);
20171 processing_has_namespace_info
= false;
20173 return get_builder ()->get_compunit_symtab ();
20177 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20178 struct dwarf2_cu
*cu
)
20180 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20181 struct comp_unit_head
*cu_header
= &cu
->header
;
20183 /* NOTE drow/2003-01-30: There used to be a comment and some special
20184 code here to turn a symbol with DW_AT_external and a
20185 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20186 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20187 with some versions of binutils) where shared libraries could have
20188 relocations against symbols in their debug information - the
20189 minimal symbol would have the right address, but the debug info
20190 would not. It's no longer necessary, because we will explicitly
20191 apply relocations when we read in the debug information now. */
20193 /* A DW_AT_location attribute with no contents indicates that a
20194 variable has been optimized away. */
20195 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20197 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20201 /* Handle one degenerate form of location expression specially, to
20202 preserve GDB's previous behavior when section offsets are
20203 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20204 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20206 if (attr
->form_is_block ()
20207 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20208 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20209 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20210 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20211 && (DW_BLOCK (attr
)->size
20212 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20214 unsigned int dummy
;
20216 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20217 SET_SYMBOL_VALUE_ADDRESS
20218 (sym
, cu
->header
.read_address (objfile
->obfd
,
20219 DW_BLOCK (attr
)->data
+ 1,
20222 SET_SYMBOL_VALUE_ADDRESS
20223 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20225 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20226 fixup_symbol_section (sym
, objfile
);
20227 SET_SYMBOL_VALUE_ADDRESS
20229 SYMBOL_VALUE_ADDRESS (sym
)
20230 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20234 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20235 expression evaluator, and use LOC_COMPUTED only when necessary
20236 (i.e. when the value of a register or memory location is
20237 referenced, or a thread-local block, etc.). Then again, it might
20238 not be worthwhile. I'm assuming that it isn't unless performance
20239 or memory numbers show me otherwise. */
20241 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20243 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20244 cu
->has_loclist
= true;
20247 /* Given a pointer to a DWARF information entry, figure out if we need
20248 to make a symbol table entry for it, and if so, create a new entry
20249 and return a pointer to it.
20250 If TYPE is NULL, determine symbol type from the die, otherwise
20251 used the passed type.
20252 If SPACE is not NULL, use it to hold the new symbol. If it is
20253 NULL, allocate a new symbol on the objfile's obstack. */
20255 static struct symbol
*
20256 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20257 struct symbol
*space
)
20259 struct dwarf2_per_objfile
*dwarf2_per_objfile
20260 = cu
->per_cu
->dwarf2_per_objfile
;
20261 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20262 struct gdbarch
*gdbarch
= objfile
->arch ();
20263 struct symbol
*sym
= NULL
;
20265 struct attribute
*attr
= NULL
;
20266 struct attribute
*attr2
= NULL
;
20267 CORE_ADDR baseaddr
;
20268 struct pending
**list_to_add
= NULL
;
20270 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20272 baseaddr
= objfile
->text_section_offset ();
20274 name
= dwarf2_name (die
, cu
);
20277 const char *linkagename
;
20278 int suppress_add
= 0;
20283 sym
= allocate_symbol (objfile
);
20284 OBJSTAT (objfile
, n_syms
++);
20286 /* Cache this symbol's name and the name's demangled form (if any). */
20287 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20288 linkagename
= dwarf2_physname (name
, die
, cu
);
20289 sym
->compute_and_set_names (linkagename
, false, objfile
->per_bfd
);
20291 /* Fortran does not have mangling standard and the mangling does differ
20292 between gfortran, iFort etc. */
20293 if (cu
->language
== language_fortran
20294 && symbol_get_demangled_name (sym
) == NULL
)
20295 symbol_set_demangled_name (sym
,
20296 dwarf2_full_name (name
, die
, cu
),
20299 /* Default assumptions.
20300 Use the passed type or decode it from the die. */
20301 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20302 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20304 SYMBOL_TYPE (sym
) = type
;
20306 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20307 attr
= dwarf2_attr (die
,
20308 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20310 if (attr
!= nullptr)
20312 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20315 attr
= dwarf2_attr (die
,
20316 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20318 if (attr
!= nullptr)
20320 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20321 struct file_entry
*fe
;
20323 if (cu
->line_header
!= NULL
)
20324 fe
= cu
->line_header
->file_name_at (file_index
);
20329 complaint (_("file index out of range"));
20331 symbol_set_symtab (sym
, fe
->symtab
);
20337 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20338 if (attr
!= nullptr)
20342 addr
= attr
->value_as_address ();
20343 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20344 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20346 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20347 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20348 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20349 add_symbol_to_list (sym
, cu
->list_in_scope
);
20351 case DW_TAG_subprogram
:
20352 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20354 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20355 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20356 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20357 || cu
->language
== language_ada
20358 || cu
->language
== language_fortran
)
20360 /* Subprograms marked external are stored as a global symbol.
20361 Ada and Fortran subprograms, whether marked external or
20362 not, are always stored as a global symbol, because we want
20363 to be able to access them globally. For instance, we want
20364 to be able to break on a nested subprogram without having
20365 to specify the context. */
20366 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20370 list_to_add
= cu
->list_in_scope
;
20373 case DW_TAG_inlined_subroutine
:
20374 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20376 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20377 SYMBOL_INLINED (sym
) = 1;
20378 list_to_add
= cu
->list_in_scope
;
20380 case DW_TAG_template_value_param
:
20382 /* Fall through. */
20383 case DW_TAG_constant
:
20384 case DW_TAG_variable
:
20385 case DW_TAG_member
:
20386 /* Compilation with minimal debug info may result in
20387 variables with missing type entries. Change the
20388 misleading `void' type to something sensible. */
20389 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20390 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20392 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20393 /* In the case of DW_TAG_member, we should only be called for
20394 static const members. */
20395 if (die
->tag
== DW_TAG_member
)
20397 /* dwarf2_add_field uses die_is_declaration,
20398 so we do the same. */
20399 gdb_assert (die_is_declaration (die
, cu
));
20402 if (attr
!= nullptr)
20404 dwarf2_const_value (attr
, sym
, cu
);
20405 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20408 if (attr2
&& (DW_UNSND (attr2
) != 0))
20409 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20411 list_to_add
= cu
->list_in_scope
;
20415 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20416 if (attr
!= nullptr)
20418 var_decode_location (attr
, sym
, cu
);
20419 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20421 /* Fortran explicitly imports any global symbols to the local
20422 scope by DW_TAG_common_block. */
20423 if (cu
->language
== language_fortran
&& die
->parent
20424 && die
->parent
->tag
== DW_TAG_common_block
)
20427 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20428 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20429 && !dwarf2_per_objfile
->has_section_at_zero
)
20431 /* When a static variable is eliminated by the linker,
20432 the corresponding debug information is not stripped
20433 out, but the variable address is set to null;
20434 do not add such variables into symbol table. */
20436 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20438 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20439 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20440 && dwarf2_per_objfile
->can_copy
)
20442 /* A global static variable might be subject to
20443 copy relocation. We first check for a local
20444 minsym, though, because maybe the symbol was
20445 marked hidden, in which case this would not
20447 bound_minimal_symbol found
20448 = (lookup_minimal_symbol_linkage
20449 (sym
->linkage_name (), objfile
));
20450 if (found
.minsym
!= nullptr)
20451 sym
->maybe_copied
= 1;
20454 /* A variable with DW_AT_external is never static,
20455 but it may be block-scoped. */
20457 = ((cu
->list_in_scope
20458 == cu
->get_builder ()->get_file_symbols ())
20459 ? cu
->get_builder ()->get_global_symbols ()
20460 : cu
->list_in_scope
);
20463 list_to_add
= cu
->list_in_scope
;
20467 /* We do not know the address of this symbol.
20468 If it is an external symbol and we have type information
20469 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20470 The address of the variable will then be determined from
20471 the minimal symbol table whenever the variable is
20473 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20475 /* Fortran explicitly imports any global symbols to the local
20476 scope by DW_TAG_common_block. */
20477 if (cu
->language
== language_fortran
&& die
->parent
20478 && die
->parent
->tag
== DW_TAG_common_block
)
20480 /* SYMBOL_CLASS doesn't matter here because
20481 read_common_block is going to reset it. */
20483 list_to_add
= cu
->list_in_scope
;
20485 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20486 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20488 /* A variable with DW_AT_external is never static, but it
20489 may be block-scoped. */
20491 = ((cu
->list_in_scope
20492 == cu
->get_builder ()->get_file_symbols ())
20493 ? cu
->get_builder ()->get_global_symbols ()
20494 : cu
->list_in_scope
);
20496 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20498 else if (!die_is_declaration (die
, cu
))
20500 /* Use the default LOC_OPTIMIZED_OUT class. */
20501 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20503 list_to_add
= cu
->list_in_scope
;
20507 case DW_TAG_formal_parameter
:
20509 /* If we are inside a function, mark this as an argument. If
20510 not, we might be looking at an argument to an inlined function
20511 when we do not have enough information to show inlined frames;
20512 pretend it's a local variable in that case so that the user can
20514 struct context_stack
*curr
20515 = cu
->get_builder ()->get_current_context_stack ();
20516 if (curr
!= nullptr && curr
->name
!= nullptr)
20517 SYMBOL_IS_ARGUMENT (sym
) = 1;
20518 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20519 if (attr
!= nullptr)
20521 var_decode_location (attr
, sym
, cu
);
20523 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20524 if (attr
!= nullptr)
20526 dwarf2_const_value (attr
, sym
, cu
);
20529 list_to_add
= cu
->list_in_scope
;
20532 case DW_TAG_unspecified_parameters
:
20533 /* From varargs functions; gdb doesn't seem to have any
20534 interest in this information, so just ignore it for now.
20537 case DW_TAG_template_type_param
:
20539 /* Fall through. */
20540 case DW_TAG_class_type
:
20541 case DW_TAG_interface_type
:
20542 case DW_TAG_structure_type
:
20543 case DW_TAG_union_type
:
20544 case DW_TAG_set_type
:
20545 case DW_TAG_enumeration_type
:
20546 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20547 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20550 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20551 really ever be static objects: otherwise, if you try
20552 to, say, break of a class's method and you're in a file
20553 which doesn't mention that class, it won't work unless
20554 the check for all static symbols in lookup_symbol_aux
20555 saves you. See the OtherFileClass tests in
20556 gdb.c++/namespace.exp. */
20560 buildsym_compunit
*builder
= cu
->get_builder ();
20562 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20563 && cu
->language
== language_cplus
20564 ? builder
->get_global_symbols ()
20565 : cu
->list_in_scope
);
20567 /* The semantics of C++ state that "struct foo {
20568 ... }" also defines a typedef for "foo". */
20569 if (cu
->language
== language_cplus
20570 || cu
->language
== language_ada
20571 || cu
->language
== language_d
20572 || cu
->language
== language_rust
)
20574 /* The symbol's name is already allocated along
20575 with this objfile, so we don't need to
20576 duplicate it for the type. */
20577 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20578 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
20583 case DW_TAG_typedef
:
20584 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20585 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20586 list_to_add
= cu
->list_in_scope
;
20588 case DW_TAG_base_type
:
20589 case DW_TAG_subrange_type
:
20590 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20591 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20592 list_to_add
= cu
->list_in_scope
;
20594 case DW_TAG_enumerator
:
20595 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20596 if (attr
!= nullptr)
20598 dwarf2_const_value (attr
, sym
, cu
);
20601 /* NOTE: carlton/2003-11-10: See comment above in the
20602 DW_TAG_class_type, etc. block. */
20605 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20606 && cu
->language
== language_cplus
20607 ? cu
->get_builder ()->get_global_symbols ()
20608 : cu
->list_in_scope
);
20611 case DW_TAG_imported_declaration
:
20612 case DW_TAG_namespace
:
20613 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20614 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20616 case DW_TAG_module
:
20617 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20618 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20619 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20621 case DW_TAG_common_block
:
20622 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20623 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20624 add_symbol_to_list (sym
, cu
->list_in_scope
);
20627 /* Not a tag we recognize. Hopefully we aren't processing
20628 trash data, but since we must specifically ignore things
20629 we don't recognize, there is nothing else we should do at
20631 complaint (_("unsupported tag: '%s'"),
20632 dwarf_tag_name (die
->tag
));
20638 sym
->hash_next
= objfile
->template_symbols
;
20639 objfile
->template_symbols
= sym
;
20640 list_to_add
= NULL
;
20643 if (list_to_add
!= NULL
)
20644 add_symbol_to_list (sym
, list_to_add
);
20646 /* For the benefit of old versions of GCC, check for anonymous
20647 namespaces based on the demangled name. */
20648 if (!cu
->processing_has_namespace_info
20649 && cu
->language
== language_cplus
)
20650 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
20655 /* Given an attr with a DW_FORM_dataN value in host byte order,
20656 zero-extend it as appropriate for the symbol's type. The DWARF
20657 standard (v4) is not entirely clear about the meaning of using
20658 DW_FORM_dataN for a constant with a signed type, where the type is
20659 wider than the data. The conclusion of a discussion on the DWARF
20660 list was that this is unspecified. We choose to always zero-extend
20661 because that is the interpretation long in use by GCC. */
20664 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20665 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20667 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20668 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20669 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20670 LONGEST l
= DW_UNSND (attr
);
20672 if (bits
< sizeof (*value
) * 8)
20674 l
&= ((LONGEST
) 1 << bits
) - 1;
20677 else if (bits
== sizeof (*value
) * 8)
20681 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20682 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20689 /* Read a constant value from an attribute. Either set *VALUE, or if
20690 the value does not fit in *VALUE, set *BYTES - either already
20691 allocated on the objfile obstack, or newly allocated on OBSTACK,
20692 or, set *BATON, if we translated the constant to a location
20696 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20697 const char *name
, struct obstack
*obstack
,
20698 struct dwarf2_cu
*cu
,
20699 LONGEST
*value
, const gdb_byte
**bytes
,
20700 struct dwarf2_locexpr_baton
**baton
)
20702 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20703 struct comp_unit_head
*cu_header
= &cu
->header
;
20704 struct dwarf_block
*blk
;
20705 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20706 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20712 switch (attr
->form
)
20715 case DW_FORM_addrx
:
20716 case DW_FORM_GNU_addr_index
:
20720 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
20721 dwarf2_const_value_length_mismatch_complaint (name
,
20722 cu_header
->addr_size
,
20723 TYPE_LENGTH (type
));
20724 /* Symbols of this form are reasonably rare, so we just
20725 piggyback on the existing location code rather than writing
20726 a new implementation of symbol_computed_ops. */
20727 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
20728 (*baton
)->per_cu
= cu
->per_cu
;
20729 gdb_assert ((*baton
)->per_cu
);
20731 (*baton
)->size
= 2 + cu_header
->addr_size
;
20732 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
20733 (*baton
)->data
= data
;
20735 data
[0] = DW_OP_addr
;
20736 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
20737 byte_order
, DW_ADDR (attr
));
20738 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
20741 case DW_FORM_string
:
20744 case DW_FORM_GNU_str_index
:
20745 case DW_FORM_GNU_strp_alt
:
20746 /* DW_STRING is already allocated on the objfile obstack, point
20748 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
20750 case DW_FORM_block1
:
20751 case DW_FORM_block2
:
20752 case DW_FORM_block4
:
20753 case DW_FORM_block
:
20754 case DW_FORM_exprloc
:
20755 case DW_FORM_data16
:
20756 blk
= DW_BLOCK (attr
);
20757 if (TYPE_LENGTH (type
) != blk
->size
)
20758 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
20759 TYPE_LENGTH (type
));
20760 *bytes
= blk
->data
;
20763 /* The DW_AT_const_value attributes are supposed to carry the
20764 symbol's value "represented as it would be on the target
20765 architecture." By the time we get here, it's already been
20766 converted to host endianness, so we just need to sign- or
20767 zero-extend it as appropriate. */
20768 case DW_FORM_data1
:
20769 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
20771 case DW_FORM_data2
:
20772 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
20774 case DW_FORM_data4
:
20775 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
20777 case DW_FORM_data8
:
20778 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
20781 case DW_FORM_sdata
:
20782 case DW_FORM_implicit_const
:
20783 *value
= DW_SND (attr
);
20786 case DW_FORM_udata
:
20787 *value
= DW_UNSND (attr
);
20791 complaint (_("unsupported const value attribute form: '%s'"),
20792 dwarf_form_name (attr
->form
));
20799 /* Copy constant value from an attribute to a symbol. */
20802 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
20803 struct dwarf2_cu
*cu
)
20805 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20807 const gdb_byte
*bytes
;
20808 struct dwarf2_locexpr_baton
*baton
;
20810 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
20811 sym
->print_name (),
20812 &objfile
->objfile_obstack
, cu
,
20813 &value
, &bytes
, &baton
);
20817 SYMBOL_LOCATION_BATON (sym
) = baton
;
20818 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
20820 else if (bytes
!= NULL
)
20822 SYMBOL_VALUE_BYTES (sym
) = bytes
;
20823 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
20827 SYMBOL_VALUE (sym
) = value
;
20828 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
20832 /* Return the type of the die in question using its DW_AT_type attribute. */
20834 static struct type
*
20835 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20837 struct attribute
*type_attr
;
20839 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
20842 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20843 /* A missing DW_AT_type represents a void type. */
20844 return objfile_type (objfile
)->builtin_void
;
20847 return lookup_die_type (die
, type_attr
, cu
);
20850 /* True iff CU's producer generates GNAT Ada auxiliary information
20851 that allows to find parallel types through that information instead
20852 of having to do expensive parallel lookups by type name. */
20855 need_gnat_info (struct dwarf2_cu
*cu
)
20857 /* Assume that the Ada compiler was GNAT, which always produces
20858 the auxiliary information. */
20859 return (cu
->language
== language_ada
);
20862 /* Return the auxiliary type of the die in question using its
20863 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
20864 attribute is not present. */
20866 static struct type
*
20867 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20869 struct attribute
*type_attr
;
20871 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
20875 return lookup_die_type (die
, type_attr
, cu
);
20878 /* If DIE has a descriptive_type attribute, then set the TYPE's
20879 descriptive type accordingly. */
20882 set_descriptive_type (struct type
*type
, struct die_info
*die
,
20883 struct dwarf2_cu
*cu
)
20885 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
20887 if (descriptive_type
)
20889 ALLOCATE_GNAT_AUX_TYPE (type
);
20890 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
20894 /* Return the containing type of the die in question using its
20895 DW_AT_containing_type attribute. */
20897 static struct type
*
20898 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20900 struct attribute
*type_attr
;
20901 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20903 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
20905 error (_("Dwarf Error: Problem turning containing type into gdb type "
20906 "[in module %s]"), objfile_name (objfile
));
20908 return lookup_die_type (die
, type_attr
, cu
);
20911 /* Return an error marker type to use for the ill formed type in DIE/CU. */
20913 static struct type
*
20914 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
20916 struct dwarf2_per_objfile
*dwarf2_per_objfile
20917 = cu
->per_cu
->dwarf2_per_objfile
;
20918 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20921 std::string message
20922 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
20923 objfile_name (objfile
),
20924 sect_offset_str (cu
->header
.sect_off
),
20925 sect_offset_str (die
->sect_off
));
20926 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
20928 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
20931 /* Look up the type of DIE in CU using its type attribute ATTR.
20932 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
20933 DW_AT_containing_type.
20934 If there is no type substitute an error marker. */
20936 static struct type
*
20937 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
20938 struct dwarf2_cu
*cu
)
20940 struct dwarf2_per_objfile
*dwarf2_per_objfile
20941 = cu
->per_cu
->dwarf2_per_objfile
;
20942 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20943 struct type
*this_type
;
20945 gdb_assert (attr
->name
== DW_AT_type
20946 || attr
->name
== DW_AT_GNAT_descriptive_type
20947 || attr
->name
== DW_AT_containing_type
);
20949 /* First see if we have it cached. */
20951 if (attr
->form
== DW_FORM_GNU_ref_alt
)
20953 struct dwarf2_per_cu_data
*per_cu
;
20954 sect_offset sect_off
= attr
->get_ref_die_offset ();
20956 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
20957 dwarf2_per_objfile
);
20958 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
20960 else if (attr
->form_is_ref ())
20962 sect_offset sect_off
= attr
->get_ref_die_offset ();
20964 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
20966 else if (attr
->form
== DW_FORM_ref_sig8
)
20968 ULONGEST signature
= DW_SIGNATURE (attr
);
20970 return get_signatured_type (die
, signature
, cu
);
20974 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
20975 " at %s [in module %s]"),
20976 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
20977 objfile_name (objfile
));
20978 return build_error_marker_type (cu
, die
);
20981 /* If not cached we need to read it in. */
20983 if (this_type
== NULL
)
20985 struct die_info
*type_die
= NULL
;
20986 struct dwarf2_cu
*type_cu
= cu
;
20988 if (attr
->form_is_ref ())
20989 type_die
= follow_die_ref (die
, attr
, &type_cu
);
20990 if (type_die
== NULL
)
20991 return build_error_marker_type (cu
, die
);
20992 /* If we find the type now, it's probably because the type came
20993 from an inter-CU reference and the type's CU got expanded before
20995 this_type
= read_type_die (type_die
, type_cu
);
20998 /* If we still don't have a type use an error marker. */
21000 if (this_type
== NULL
)
21001 return build_error_marker_type (cu
, die
);
21006 /* Return the type in DIE, CU.
21007 Returns NULL for invalid types.
21009 This first does a lookup in die_type_hash,
21010 and only reads the die in if necessary.
21012 NOTE: This can be called when reading in partial or full symbols. */
21014 static struct type
*
21015 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21017 struct type
*this_type
;
21019 this_type
= get_die_type (die
, cu
);
21023 return read_type_die_1 (die
, cu
);
21026 /* Read the type in DIE, CU.
21027 Returns NULL for invalid types. */
21029 static struct type
*
21030 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21032 struct type
*this_type
= NULL
;
21036 case DW_TAG_class_type
:
21037 case DW_TAG_interface_type
:
21038 case DW_TAG_structure_type
:
21039 case DW_TAG_union_type
:
21040 this_type
= read_structure_type (die
, cu
);
21042 case DW_TAG_enumeration_type
:
21043 this_type
= read_enumeration_type (die
, cu
);
21045 case DW_TAG_subprogram
:
21046 case DW_TAG_subroutine_type
:
21047 case DW_TAG_inlined_subroutine
:
21048 this_type
= read_subroutine_type (die
, cu
);
21050 case DW_TAG_array_type
:
21051 this_type
= read_array_type (die
, cu
);
21053 case DW_TAG_set_type
:
21054 this_type
= read_set_type (die
, cu
);
21056 case DW_TAG_pointer_type
:
21057 this_type
= read_tag_pointer_type (die
, cu
);
21059 case DW_TAG_ptr_to_member_type
:
21060 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21062 case DW_TAG_reference_type
:
21063 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21065 case DW_TAG_rvalue_reference_type
:
21066 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21068 case DW_TAG_const_type
:
21069 this_type
= read_tag_const_type (die
, cu
);
21071 case DW_TAG_volatile_type
:
21072 this_type
= read_tag_volatile_type (die
, cu
);
21074 case DW_TAG_restrict_type
:
21075 this_type
= read_tag_restrict_type (die
, cu
);
21077 case DW_TAG_string_type
:
21078 this_type
= read_tag_string_type (die
, cu
);
21080 case DW_TAG_typedef
:
21081 this_type
= read_typedef (die
, cu
);
21083 case DW_TAG_subrange_type
:
21084 this_type
= read_subrange_type (die
, cu
);
21086 case DW_TAG_base_type
:
21087 this_type
= read_base_type (die
, cu
);
21089 case DW_TAG_unspecified_type
:
21090 this_type
= read_unspecified_type (die
, cu
);
21092 case DW_TAG_namespace
:
21093 this_type
= read_namespace_type (die
, cu
);
21095 case DW_TAG_module
:
21096 this_type
= read_module_type (die
, cu
);
21098 case DW_TAG_atomic_type
:
21099 this_type
= read_tag_atomic_type (die
, cu
);
21102 complaint (_("unexpected tag in read_type_die: '%s'"),
21103 dwarf_tag_name (die
->tag
));
21110 /* See if we can figure out if the class lives in a namespace. We do
21111 this by looking for a member function; its demangled name will
21112 contain namespace info, if there is any.
21113 Return the computed name or NULL.
21114 Space for the result is allocated on the objfile's obstack.
21115 This is the full-die version of guess_partial_die_structure_name.
21116 In this case we know DIE has no useful parent. */
21118 static const char *
21119 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21121 struct die_info
*spec_die
;
21122 struct dwarf2_cu
*spec_cu
;
21123 struct die_info
*child
;
21124 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21127 spec_die
= die_specification (die
, &spec_cu
);
21128 if (spec_die
!= NULL
)
21134 for (child
= die
->child
;
21136 child
= child
->sibling
)
21138 if (child
->tag
== DW_TAG_subprogram
)
21140 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21142 if (linkage_name
!= NULL
)
21144 gdb::unique_xmalloc_ptr
<char> actual_name
21145 (language_class_name_from_physname (cu
->language_defn
,
21147 const char *name
= NULL
;
21149 if (actual_name
!= NULL
)
21151 const char *die_name
= dwarf2_name (die
, cu
);
21153 if (die_name
!= NULL
21154 && strcmp (die_name
, actual_name
.get ()) != 0)
21156 /* Strip off the class name from the full name.
21157 We want the prefix. */
21158 int die_name_len
= strlen (die_name
);
21159 int actual_name_len
= strlen (actual_name
.get ());
21160 const char *ptr
= actual_name
.get ();
21162 /* Test for '::' as a sanity check. */
21163 if (actual_name_len
> die_name_len
+ 2
21164 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21165 name
= obstack_strndup (
21166 &objfile
->per_bfd
->storage_obstack
,
21167 ptr
, actual_name_len
- die_name_len
- 2);
21178 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21179 prefix part in such case. See
21180 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21182 static const char *
21183 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21185 struct attribute
*attr
;
21188 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21189 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21192 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21195 attr
= dw2_linkage_name_attr (die
, cu
);
21196 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21199 /* dwarf2_name had to be already called. */
21200 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21202 /* Strip the base name, keep any leading namespaces/classes. */
21203 base
= strrchr (DW_STRING (attr
), ':');
21204 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21207 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21208 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21210 &base
[-1] - DW_STRING (attr
));
21213 /* Return the name of the namespace/class that DIE is defined within,
21214 or "" if we can't tell. The caller should not xfree the result.
21216 For example, if we're within the method foo() in the following
21226 then determine_prefix on foo's die will return "N::C". */
21228 static const char *
21229 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21231 struct dwarf2_per_objfile
*dwarf2_per_objfile
21232 = cu
->per_cu
->dwarf2_per_objfile
;
21233 struct die_info
*parent
, *spec_die
;
21234 struct dwarf2_cu
*spec_cu
;
21235 struct type
*parent_type
;
21236 const char *retval
;
21238 if (cu
->language
!= language_cplus
21239 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21240 && cu
->language
!= language_rust
)
21243 retval
= anonymous_struct_prefix (die
, cu
);
21247 /* We have to be careful in the presence of DW_AT_specification.
21248 For example, with GCC 3.4, given the code
21252 // Definition of N::foo.
21256 then we'll have a tree of DIEs like this:
21258 1: DW_TAG_compile_unit
21259 2: DW_TAG_namespace // N
21260 3: DW_TAG_subprogram // declaration of N::foo
21261 4: DW_TAG_subprogram // definition of N::foo
21262 DW_AT_specification // refers to die #3
21264 Thus, when processing die #4, we have to pretend that we're in
21265 the context of its DW_AT_specification, namely the contex of die
21268 spec_die
= die_specification (die
, &spec_cu
);
21269 if (spec_die
== NULL
)
21270 parent
= die
->parent
;
21273 parent
= spec_die
->parent
;
21277 if (parent
== NULL
)
21279 else if (parent
->building_fullname
)
21282 const char *parent_name
;
21284 /* It has been seen on RealView 2.2 built binaries,
21285 DW_TAG_template_type_param types actually _defined_ as
21286 children of the parent class:
21289 template class <class Enum> Class{};
21290 Class<enum E> class_e;
21292 1: DW_TAG_class_type (Class)
21293 2: DW_TAG_enumeration_type (E)
21294 3: DW_TAG_enumerator (enum1:0)
21295 3: DW_TAG_enumerator (enum2:1)
21297 2: DW_TAG_template_type_param
21298 DW_AT_type DW_FORM_ref_udata (E)
21300 Besides being broken debug info, it can put GDB into an
21301 infinite loop. Consider:
21303 When we're building the full name for Class<E>, we'll start
21304 at Class, and go look over its template type parameters,
21305 finding E. We'll then try to build the full name of E, and
21306 reach here. We're now trying to build the full name of E,
21307 and look over the parent DIE for containing scope. In the
21308 broken case, if we followed the parent DIE of E, we'd again
21309 find Class, and once again go look at its template type
21310 arguments, etc., etc. Simply don't consider such parent die
21311 as source-level parent of this die (it can't be, the language
21312 doesn't allow it), and break the loop here. */
21313 name
= dwarf2_name (die
, cu
);
21314 parent_name
= dwarf2_name (parent
, cu
);
21315 complaint (_("template param type '%s' defined within parent '%s'"),
21316 name
? name
: "<unknown>",
21317 parent_name
? parent_name
: "<unknown>");
21321 switch (parent
->tag
)
21323 case DW_TAG_namespace
:
21324 parent_type
= read_type_die (parent
, cu
);
21325 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21326 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21327 Work around this problem here. */
21328 if (cu
->language
== language_cplus
21329 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
21331 /* We give a name to even anonymous namespaces. */
21332 return TYPE_NAME (parent_type
);
21333 case DW_TAG_class_type
:
21334 case DW_TAG_interface_type
:
21335 case DW_TAG_structure_type
:
21336 case DW_TAG_union_type
:
21337 case DW_TAG_module
:
21338 parent_type
= read_type_die (parent
, cu
);
21339 if (TYPE_NAME (parent_type
) != NULL
)
21340 return TYPE_NAME (parent_type
);
21342 /* An anonymous structure is only allowed non-static data
21343 members; no typedefs, no member functions, et cetera.
21344 So it does not need a prefix. */
21346 case DW_TAG_compile_unit
:
21347 case DW_TAG_partial_unit
:
21348 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21349 if (cu
->language
== language_cplus
21350 && !dwarf2_per_objfile
->types
.empty ()
21351 && die
->child
!= NULL
21352 && (die
->tag
== DW_TAG_class_type
21353 || die
->tag
== DW_TAG_structure_type
21354 || die
->tag
== DW_TAG_union_type
))
21356 const char *name
= guess_full_die_structure_name (die
, cu
);
21361 case DW_TAG_subprogram
:
21362 /* Nested subroutines in Fortran get a prefix with the name
21363 of the parent's subroutine. */
21364 if (cu
->language
== language_fortran
)
21366 if ((die
->tag
== DW_TAG_subprogram
)
21367 && (dwarf2_name (parent
, cu
) != NULL
))
21368 return dwarf2_name (parent
, cu
);
21370 return determine_prefix (parent
, cu
);
21371 case DW_TAG_enumeration_type
:
21372 parent_type
= read_type_die (parent
, cu
);
21373 if (TYPE_DECLARED_CLASS (parent_type
))
21375 if (TYPE_NAME (parent_type
) != NULL
)
21376 return TYPE_NAME (parent_type
);
21379 /* Fall through. */
21381 return determine_prefix (parent
, cu
);
21385 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21386 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21387 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21388 an obconcat, otherwise allocate storage for the result. The CU argument is
21389 used to determine the language and hence, the appropriate separator. */
21391 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21394 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21395 int physname
, struct dwarf2_cu
*cu
)
21397 const char *lead
= "";
21400 if (suffix
== NULL
|| suffix
[0] == '\0'
21401 || prefix
== NULL
|| prefix
[0] == '\0')
21403 else if (cu
->language
== language_d
)
21405 /* For D, the 'main' function could be defined in any module, but it
21406 should never be prefixed. */
21407 if (strcmp (suffix
, "D main") == 0)
21415 else if (cu
->language
== language_fortran
&& physname
)
21417 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21418 DW_AT_MIPS_linkage_name is preferred and used instead. */
21426 if (prefix
== NULL
)
21428 if (suffix
== NULL
)
21435 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21437 strcpy (retval
, lead
);
21438 strcat (retval
, prefix
);
21439 strcat (retval
, sep
);
21440 strcat (retval
, suffix
);
21445 /* We have an obstack. */
21446 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21450 /* Get name of a die, return NULL if not found. */
21452 static const char *
21453 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21454 struct objfile
*objfile
)
21456 if (name
&& cu
->language
== language_cplus
)
21458 std::string canon_name
= cp_canonicalize_string (name
);
21460 if (!canon_name
.empty ())
21462 if (canon_name
!= name
)
21463 name
= objfile
->intern (canon_name
);
21470 /* Get name of a die, return NULL if not found.
21471 Anonymous namespaces are converted to their magic string. */
21473 static const char *
21474 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21476 struct attribute
*attr
;
21477 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21479 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21480 if ((!attr
|| !DW_STRING (attr
))
21481 && die
->tag
!= DW_TAG_namespace
21482 && die
->tag
!= DW_TAG_class_type
21483 && die
->tag
!= DW_TAG_interface_type
21484 && die
->tag
!= DW_TAG_structure_type
21485 && die
->tag
!= DW_TAG_union_type
)
21490 case DW_TAG_compile_unit
:
21491 case DW_TAG_partial_unit
:
21492 /* Compilation units have a DW_AT_name that is a filename, not
21493 a source language identifier. */
21494 case DW_TAG_enumeration_type
:
21495 case DW_TAG_enumerator
:
21496 /* These tags always have simple identifiers already; no need
21497 to canonicalize them. */
21498 return DW_STRING (attr
);
21500 case DW_TAG_namespace
:
21501 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21502 return DW_STRING (attr
);
21503 return CP_ANONYMOUS_NAMESPACE_STR
;
21505 case DW_TAG_class_type
:
21506 case DW_TAG_interface_type
:
21507 case DW_TAG_structure_type
:
21508 case DW_TAG_union_type
:
21509 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21510 structures or unions. These were of the form "._%d" in GCC 4.1,
21511 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21512 and GCC 4.4. We work around this problem by ignoring these. */
21513 if (attr
&& DW_STRING (attr
)
21514 && (startswith (DW_STRING (attr
), "._")
21515 || startswith (DW_STRING (attr
), "<anonymous")))
21518 /* GCC might emit a nameless typedef that has a linkage name. See
21519 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21520 if (!attr
|| DW_STRING (attr
) == NULL
)
21522 attr
= dw2_linkage_name_attr (die
, cu
);
21523 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21526 /* Avoid demangling DW_STRING (attr) the second time on a second
21527 call for the same DIE. */
21528 if (!DW_STRING_IS_CANONICAL (attr
))
21530 gdb::unique_xmalloc_ptr
<char> demangled
21531 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21532 if (demangled
== nullptr)
21535 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21536 DW_STRING_IS_CANONICAL (attr
) = 1;
21539 /* Strip any leading namespaces/classes, keep only the base name.
21540 DW_AT_name for named DIEs does not contain the prefixes. */
21541 const char *base
= strrchr (DW_STRING (attr
), ':');
21542 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21545 return DW_STRING (attr
);
21553 if (!DW_STRING_IS_CANONICAL (attr
))
21555 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21557 DW_STRING_IS_CANONICAL (attr
) = 1;
21559 return DW_STRING (attr
);
21562 /* Return the die that this die in an extension of, or NULL if there
21563 is none. *EXT_CU is the CU containing DIE on input, and the CU
21564 containing the return value on output. */
21566 static struct die_info
*
21567 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21569 struct attribute
*attr
;
21571 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21575 return follow_die_ref (die
, attr
, ext_cu
);
21579 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21583 print_spaces (indent
, f
);
21584 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21585 dwarf_tag_name (die
->tag
), die
->abbrev
,
21586 sect_offset_str (die
->sect_off
));
21588 if (die
->parent
!= NULL
)
21590 print_spaces (indent
, f
);
21591 fprintf_unfiltered (f
, " parent at offset: %s\n",
21592 sect_offset_str (die
->parent
->sect_off
));
21595 print_spaces (indent
, f
);
21596 fprintf_unfiltered (f
, " has children: %s\n",
21597 dwarf_bool_name (die
->child
!= NULL
));
21599 print_spaces (indent
, f
);
21600 fprintf_unfiltered (f
, " attributes:\n");
21602 for (i
= 0; i
< die
->num_attrs
; ++i
)
21604 print_spaces (indent
, f
);
21605 fprintf_unfiltered (f
, " %s (%s) ",
21606 dwarf_attr_name (die
->attrs
[i
].name
),
21607 dwarf_form_name (die
->attrs
[i
].form
));
21609 switch (die
->attrs
[i
].form
)
21612 case DW_FORM_addrx
:
21613 case DW_FORM_GNU_addr_index
:
21614 fprintf_unfiltered (f
, "address: ");
21615 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21617 case DW_FORM_block2
:
21618 case DW_FORM_block4
:
21619 case DW_FORM_block
:
21620 case DW_FORM_block1
:
21621 fprintf_unfiltered (f
, "block: size %s",
21622 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21624 case DW_FORM_exprloc
:
21625 fprintf_unfiltered (f
, "expression: size %s",
21626 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21628 case DW_FORM_data16
:
21629 fprintf_unfiltered (f
, "constant of 16 bytes");
21631 case DW_FORM_ref_addr
:
21632 fprintf_unfiltered (f
, "ref address: ");
21633 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21635 case DW_FORM_GNU_ref_alt
:
21636 fprintf_unfiltered (f
, "alt ref address: ");
21637 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21643 case DW_FORM_ref_udata
:
21644 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21645 (long) (DW_UNSND (&die
->attrs
[i
])));
21647 case DW_FORM_data1
:
21648 case DW_FORM_data2
:
21649 case DW_FORM_data4
:
21650 case DW_FORM_data8
:
21651 case DW_FORM_udata
:
21652 case DW_FORM_sdata
:
21653 fprintf_unfiltered (f
, "constant: %s",
21654 pulongest (DW_UNSND (&die
->attrs
[i
])));
21656 case DW_FORM_sec_offset
:
21657 fprintf_unfiltered (f
, "section offset: %s",
21658 pulongest (DW_UNSND (&die
->attrs
[i
])));
21660 case DW_FORM_ref_sig8
:
21661 fprintf_unfiltered (f
, "signature: %s",
21662 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21664 case DW_FORM_string
:
21666 case DW_FORM_line_strp
:
21668 case DW_FORM_GNU_str_index
:
21669 case DW_FORM_GNU_strp_alt
:
21670 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21671 DW_STRING (&die
->attrs
[i
])
21672 ? DW_STRING (&die
->attrs
[i
]) : "",
21673 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21676 if (DW_UNSND (&die
->attrs
[i
]))
21677 fprintf_unfiltered (f
, "flag: TRUE");
21679 fprintf_unfiltered (f
, "flag: FALSE");
21681 case DW_FORM_flag_present
:
21682 fprintf_unfiltered (f
, "flag: TRUE");
21684 case DW_FORM_indirect
:
21685 /* The reader will have reduced the indirect form to
21686 the "base form" so this form should not occur. */
21687 fprintf_unfiltered (f
,
21688 "unexpected attribute form: DW_FORM_indirect");
21690 case DW_FORM_implicit_const
:
21691 fprintf_unfiltered (f
, "constant: %s",
21692 plongest (DW_SND (&die
->attrs
[i
])));
21695 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21696 die
->attrs
[i
].form
);
21699 fprintf_unfiltered (f
, "\n");
21704 dump_die_for_error (struct die_info
*die
)
21706 dump_die_shallow (gdb_stderr
, 0, die
);
21710 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21712 int indent
= level
* 4;
21714 gdb_assert (die
!= NULL
);
21716 if (level
>= max_level
)
21719 dump_die_shallow (f
, indent
, die
);
21721 if (die
->child
!= NULL
)
21723 print_spaces (indent
, f
);
21724 fprintf_unfiltered (f
, " Children:");
21725 if (level
+ 1 < max_level
)
21727 fprintf_unfiltered (f
, "\n");
21728 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
21732 fprintf_unfiltered (f
,
21733 " [not printed, max nesting level reached]\n");
21737 if (die
->sibling
!= NULL
&& level
> 0)
21739 dump_die_1 (f
, level
, max_level
, die
->sibling
);
21743 /* This is called from the pdie macro in gdbinit.in.
21744 It's not static so gcc will keep a copy callable from gdb. */
21747 dump_die (struct die_info
*die
, int max_level
)
21749 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
21753 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
21757 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
21758 to_underlying (die
->sect_off
),
21764 /* Follow reference or signature attribute ATTR of SRC_DIE.
21765 On entry *REF_CU is the CU of SRC_DIE.
21766 On exit *REF_CU is the CU of the result. */
21768 static struct die_info
*
21769 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21770 struct dwarf2_cu
**ref_cu
)
21772 struct die_info
*die
;
21774 if (attr
->form_is_ref ())
21775 die
= follow_die_ref (src_die
, attr
, ref_cu
);
21776 else if (attr
->form
== DW_FORM_ref_sig8
)
21777 die
= follow_die_sig (src_die
, attr
, ref_cu
);
21780 dump_die_for_error (src_die
);
21781 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
21782 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
21788 /* Follow reference OFFSET.
21789 On entry *REF_CU is the CU of the source die referencing OFFSET.
21790 On exit *REF_CU is the CU of the result.
21791 Returns NULL if OFFSET is invalid. */
21793 static struct die_info
*
21794 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
21795 struct dwarf2_cu
**ref_cu
)
21797 struct die_info temp_die
;
21798 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
21799 struct dwarf2_per_objfile
*dwarf2_per_objfile
21800 = cu
->per_cu
->dwarf2_per_objfile
;
21802 gdb_assert (cu
->per_cu
!= NULL
);
21806 if (cu
->per_cu
->is_debug_types
)
21808 /* .debug_types CUs cannot reference anything outside their CU.
21809 If they need to, they have to reference a signatured type via
21810 DW_FORM_ref_sig8. */
21811 if (!cu
->header
.offset_in_cu_p (sect_off
))
21814 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
21815 || !cu
->header
.offset_in_cu_p (sect_off
))
21817 struct dwarf2_per_cu_data
*per_cu
;
21819 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
21820 dwarf2_per_objfile
);
21822 /* If necessary, add it to the queue and load its DIEs. */
21823 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
21824 load_full_comp_unit (per_cu
, false, cu
->language
);
21826 target_cu
= per_cu
->cu
;
21828 else if (cu
->dies
== NULL
)
21830 /* We're loading full DIEs during partial symbol reading. */
21831 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
21832 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
21835 *ref_cu
= target_cu
;
21836 temp_die
.sect_off
= sect_off
;
21838 if (target_cu
!= cu
)
21839 target_cu
->ancestor
= cu
;
21841 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
21843 to_underlying (sect_off
));
21846 /* Follow reference attribute ATTR of SRC_DIE.
21847 On entry *REF_CU is the CU of SRC_DIE.
21848 On exit *REF_CU is the CU of the result. */
21850 static struct die_info
*
21851 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
21852 struct dwarf2_cu
**ref_cu
)
21854 sect_offset sect_off
= attr
->get_ref_die_offset ();
21855 struct dwarf2_cu
*cu
= *ref_cu
;
21856 struct die_info
*die
;
21858 die
= follow_die_offset (sect_off
,
21859 (attr
->form
== DW_FORM_GNU_ref_alt
21860 || cu
->per_cu
->is_dwz
),
21863 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
21864 "at %s [in module %s]"),
21865 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
21866 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
21873 struct dwarf2_locexpr_baton
21874 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
21875 dwarf2_per_cu_data
*per_cu
,
21876 CORE_ADDR (*get_frame_pc
) (void *baton
),
21877 void *baton
, bool resolve_abstract_p
)
21879 struct dwarf2_cu
*cu
;
21880 struct die_info
*die
;
21881 struct attribute
*attr
;
21882 struct dwarf2_locexpr_baton retval
;
21883 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
21884 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21886 if (per_cu
->cu
== NULL
)
21887 load_cu (per_cu
, false);
21891 /* We shouldn't get here for a dummy CU, but don't crash on the user.
21892 Instead just throw an error, not much else we can do. */
21893 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
21894 sect_offset_str (sect_off
), objfile_name (objfile
));
21897 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21899 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
21900 sect_offset_str (sect_off
), objfile_name (objfile
));
21902 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21903 if (!attr
&& resolve_abstract_p
21904 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
21905 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
21907 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
21908 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
21909 struct gdbarch
*gdbarch
= objfile
->arch ();
21911 for (const auto &cand_off
21912 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
21914 struct dwarf2_cu
*cand_cu
= cu
;
21915 struct die_info
*cand
21916 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
21919 || cand
->parent
->tag
!= DW_TAG_subprogram
)
21922 CORE_ADDR pc_low
, pc_high
;
21923 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
21924 if (pc_low
== ((CORE_ADDR
) -1))
21926 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
21927 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
21928 if (!(pc_low
<= pc
&& pc
< pc_high
))
21932 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21939 /* DWARF: "If there is no such attribute, then there is no effect.".
21940 DATA is ignored if SIZE is 0. */
21942 retval
.data
= NULL
;
21945 else if (attr
->form_is_section_offset ())
21947 struct dwarf2_loclist_baton loclist_baton
;
21948 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
21951 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
21953 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
21955 retval
.size
= size
;
21959 if (!attr
->form_is_block ())
21960 error (_("Dwarf Error: DIE at %s referenced in module %s "
21961 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
21962 sect_offset_str (sect_off
), objfile_name (objfile
));
21964 retval
.data
= DW_BLOCK (attr
)->data
;
21965 retval
.size
= DW_BLOCK (attr
)->size
;
21967 retval
.per_cu
= cu
->per_cu
;
21969 age_cached_comp_units (dwarf2_per_objfile
);
21976 struct dwarf2_locexpr_baton
21977 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
21978 dwarf2_per_cu_data
*per_cu
,
21979 CORE_ADDR (*get_frame_pc
) (void *baton
),
21982 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
21984 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
21987 /* Write a constant of a given type as target-ordered bytes into
21990 static const gdb_byte
*
21991 write_constant_as_bytes (struct obstack
*obstack
,
21992 enum bfd_endian byte_order
,
21999 *len
= TYPE_LENGTH (type
);
22000 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22001 store_unsigned_integer (result
, *len
, byte_order
, value
);
22009 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22010 dwarf2_per_cu_data
*per_cu
,
22014 struct dwarf2_cu
*cu
;
22015 struct die_info
*die
;
22016 struct attribute
*attr
;
22017 const gdb_byte
*result
= NULL
;
22020 enum bfd_endian byte_order
;
22021 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22023 if (per_cu
->cu
== NULL
)
22024 load_cu (per_cu
, false);
22028 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22029 Instead just throw an error, not much else we can do. */
22030 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22031 sect_offset_str (sect_off
), objfile_name (objfile
));
22034 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22036 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22037 sect_offset_str (sect_off
), objfile_name (objfile
));
22039 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22043 byte_order
= (bfd_big_endian (objfile
->obfd
)
22044 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22046 switch (attr
->form
)
22049 case DW_FORM_addrx
:
22050 case DW_FORM_GNU_addr_index
:
22054 *len
= cu
->header
.addr_size
;
22055 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22056 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22060 case DW_FORM_string
:
22063 case DW_FORM_GNU_str_index
:
22064 case DW_FORM_GNU_strp_alt
:
22065 /* DW_STRING is already allocated on the objfile obstack, point
22067 result
= (const gdb_byte
*) DW_STRING (attr
);
22068 *len
= strlen (DW_STRING (attr
));
22070 case DW_FORM_block1
:
22071 case DW_FORM_block2
:
22072 case DW_FORM_block4
:
22073 case DW_FORM_block
:
22074 case DW_FORM_exprloc
:
22075 case DW_FORM_data16
:
22076 result
= DW_BLOCK (attr
)->data
;
22077 *len
= DW_BLOCK (attr
)->size
;
22080 /* The DW_AT_const_value attributes are supposed to carry the
22081 symbol's value "represented as it would be on the target
22082 architecture." By the time we get here, it's already been
22083 converted to host endianness, so we just need to sign- or
22084 zero-extend it as appropriate. */
22085 case DW_FORM_data1
:
22086 type
= die_type (die
, cu
);
22087 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22088 if (result
== NULL
)
22089 result
= write_constant_as_bytes (obstack
, byte_order
,
22092 case DW_FORM_data2
:
22093 type
= die_type (die
, cu
);
22094 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22095 if (result
== NULL
)
22096 result
= write_constant_as_bytes (obstack
, byte_order
,
22099 case DW_FORM_data4
:
22100 type
= die_type (die
, cu
);
22101 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22102 if (result
== NULL
)
22103 result
= write_constant_as_bytes (obstack
, byte_order
,
22106 case DW_FORM_data8
:
22107 type
= die_type (die
, cu
);
22108 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22109 if (result
== NULL
)
22110 result
= write_constant_as_bytes (obstack
, byte_order
,
22114 case DW_FORM_sdata
:
22115 case DW_FORM_implicit_const
:
22116 type
= die_type (die
, cu
);
22117 result
= write_constant_as_bytes (obstack
, byte_order
,
22118 type
, DW_SND (attr
), len
);
22121 case DW_FORM_udata
:
22122 type
= die_type (die
, cu
);
22123 result
= write_constant_as_bytes (obstack
, byte_order
,
22124 type
, DW_UNSND (attr
), len
);
22128 complaint (_("unsupported const value attribute form: '%s'"),
22129 dwarf_form_name (attr
->form
));
22139 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22140 dwarf2_per_cu_data
*per_cu
)
22142 struct dwarf2_cu
*cu
;
22143 struct die_info
*die
;
22145 if (per_cu
->cu
== NULL
)
22146 load_cu (per_cu
, false);
22151 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22155 return die_type (die
, cu
);
22161 dwarf2_get_die_type (cu_offset die_offset
,
22162 struct dwarf2_per_cu_data
*per_cu
)
22164 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22165 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22168 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22169 On entry *REF_CU is the CU of SRC_DIE.
22170 On exit *REF_CU is the CU of the result.
22171 Returns NULL if the referenced DIE isn't found. */
22173 static struct die_info
*
22174 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22175 struct dwarf2_cu
**ref_cu
)
22177 struct die_info temp_die
;
22178 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22179 struct die_info
*die
;
22181 /* While it might be nice to assert sig_type->type == NULL here,
22182 we can get here for DW_AT_imported_declaration where we need
22183 the DIE not the type. */
22185 /* If necessary, add it to the queue and load its DIEs. */
22187 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22188 read_signatured_type (sig_type
);
22190 sig_cu
= sig_type
->per_cu
.cu
;
22191 gdb_assert (sig_cu
!= NULL
);
22192 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22193 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22194 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22195 to_underlying (temp_die
.sect_off
));
22198 struct dwarf2_per_objfile
*dwarf2_per_objfile
22199 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22201 /* For .gdb_index version 7 keep track of included TUs.
22202 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22203 if (dwarf2_per_objfile
->index_table
!= NULL
22204 && dwarf2_per_objfile
->index_table
->version
<= 7)
22206 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22211 sig_cu
->ancestor
= cu
;
22219 /* Follow signatured type referenced by ATTR in SRC_DIE.
22220 On entry *REF_CU is the CU of SRC_DIE.
22221 On exit *REF_CU is the CU of the result.
22222 The result is the DIE of the type.
22223 If the referenced type cannot be found an error is thrown. */
22225 static struct die_info
*
22226 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22227 struct dwarf2_cu
**ref_cu
)
22229 ULONGEST signature
= DW_SIGNATURE (attr
);
22230 struct signatured_type
*sig_type
;
22231 struct die_info
*die
;
22233 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22235 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22236 /* sig_type will be NULL if the signatured type is missing from
22238 if (sig_type
== NULL
)
22240 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22241 " from DIE at %s [in module %s]"),
22242 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22243 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22246 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22249 dump_die_for_error (src_die
);
22250 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22251 " from DIE at %s [in module %s]"),
22252 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22253 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22259 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22260 reading in and processing the type unit if necessary. */
22262 static struct type
*
22263 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22264 struct dwarf2_cu
*cu
)
22266 struct dwarf2_per_objfile
*dwarf2_per_objfile
22267 = cu
->per_cu
->dwarf2_per_objfile
;
22268 struct signatured_type
*sig_type
;
22269 struct dwarf2_cu
*type_cu
;
22270 struct die_info
*type_die
;
22273 sig_type
= lookup_signatured_type (cu
, signature
);
22274 /* sig_type will be NULL if the signatured type is missing from
22276 if (sig_type
== NULL
)
22278 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22279 " from DIE at %s [in module %s]"),
22280 hex_string (signature
), sect_offset_str (die
->sect_off
),
22281 objfile_name (dwarf2_per_objfile
->objfile
));
22282 return build_error_marker_type (cu
, die
);
22285 /* If we already know the type we're done. */
22286 if (sig_type
->type
!= NULL
)
22287 return sig_type
->type
;
22290 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22291 if (type_die
!= NULL
)
22293 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22294 is created. This is important, for example, because for c++ classes
22295 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22296 type
= read_type_die (type_die
, type_cu
);
22299 complaint (_("Dwarf Error: Cannot build signatured type %s"
22300 " referenced from DIE at %s [in module %s]"),
22301 hex_string (signature
), sect_offset_str (die
->sect_off
),
22302 objfile_name (dwarf2_per_objfile
->objfile
));
22303 type
= build_error_marker_type (cu
, die
);
22308 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22309 " from DIE at %s [in module %s]"),
22310 hex_string (signature
), sect_offset_str (die
->sect_off
),
22311 objfile_name (dwarf2_per_objfile
->objfile
));
22312 type
= build_error_marker_type (cu
, die
);
22314 sig_type
->type
= type
;
22319 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22320 reading in and processing the type unit if necessary. */
22322 static struct type
*
22323 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22324 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22326 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22327 if (attr
->form_is_ref ())
22329 struct dwarf2_cu
*type_cu
= cu
;
22330 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22332 return read_type_die (type_die
, type_cu
);
22334 else if (attr
->form
== DW_FORM_ref_sig8
)
22336 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22340 struct dwarf2_per_objfile
*dwarf2_per_objfile
22341 = cu
->per_cu
->dwarf2_per_objfile
;
22343 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22344 " at %s [in module %s]"),
22345 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22346 objfile_name (dwarf2_per_objfile
->objfile
));
22347 return build_error_marker_type (cu
, die
);
22351 /* Load the DIEs associated with type unit PER_CU into memory. */
22354 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22356 struct signatured_type
*sig_type
;
22358 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22359 gdb_assert (! per_cu
->type_unit_group_p ());
22361 /* We have the per_cu, but we need the signatured_type.
22362 Fortunately this is an easy translation. */
22363 gdb_assert (per_cu
->is_debug_types
);
22364 sig_type
= (struct signatured_type
*) per_cu
;
22366 gdb_assert (per_cu
->cu
== NULL
);
22368 read_signatured_type (sig_type
);
22370 gdb_assert (per_cu
->cu
!= NULL
);
22373 /* Read in a signatured type and build its CU and DIEs.
22374 If the type is a stub for the real type in a DWO file,
22375 read in the real type from the DWO file as well. */
22378 read_signatured_type (struct signatured_type
*sig_type
)
22380 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22382 gdb_assert (per_cu
->is_debug_types
);
22383 gdb_assert (per_cu
->cu
== NULL
);
22385 cutu_reader
reader (per_cu
, NULL
, 0, false);
22387 if (!reader
.dummy_p
)
22389 struct dwarf2_cu
*cu
= reader
.cu
;
22390 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22392 gdb_assert (cu
->die_hash
== NULL
);
22394 htab_create_alloc_ex (cu
->header
.length
/ 12,
22398 &cu
->comp_unit_obstack
,
22399 hashtab_obstack_allocate
,
22400 dummy_obstack_deallocate
);
22402 if (reader
.comp_unit_die
->has_children
)
22403 reader
.comp_unit_die
->child
22404 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22405 reader
.comp_unit_die
);
22406 cu
->dies
= reader
.comp_unit_die
;
22407 /* comp_unit_die is not stored in die_hash, no need. */
22409 /* We try not to read any attributes in this function, because
22410 not all CUs needed for references have been loaded yet, and
22411 symbol table processing isn't initialized. But we have to
22412 set the CU language, or we won't be able to build types
22413 correctly. Similarly, if we do not read the producer, we can
22414 not apply producer-specific interpretation. */
22415 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22420 sig_type
->per_cu
.tu_read
= 1;
22423 /* Decode simple location descriptions.
22424 Given a pointer to a dwarf block that defines a location, compute
22425 the location and return the value.
22427 NOTE drow/2003-11-18: This function is called in two situations
22428 now: for the address of static or global variables (partial symbols
22429 only) and for offsets into structures which are expected to be
22430 (more or less) constant. The partial symbol case should go away,
22431 and only the constant case should remain. That will let this
22432 function complain more accurately. A few special modes are allowed
22433 without complaint for global variables (for instance, global
22434 register values and thread-local values).
22436 A location description containing no operations indicates that the
22437 object is optimized out. The return value is 0 for that case.
22438 FIXME drow/2003-11-16: No callers check for this case any more; soon all
22439 callers will only want a very basic result and this can become a
22442 Note that stack[0] is unused except as a default error return. */
22445 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
22447 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22449 size_t size
= blk
->size
;
22450 const gdb_byte
*data
= blk
->data
;
22451 CORE_ADDR stack
[64];
22453 unsigned int bytes_read
, unsnd
;
22459 stack
[++stacki
] = 0;
22498 stack
[++stacki
] = op
- DW_OP_lit0
;
22533 stack
[++stacki
] = op
- DW_OP_reg0
;
22535 dwarf2_complex_location_expr_complaint ();
22539 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22541 stack
[++stacki
] = unsnd
;
22543 dwarf2_complex_location_expr_complaint ();
22547 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22552 case DW_OP_const1u
:
22553 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22557 case DW_OP_const1s
:
22558 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22562 case DW_OP_const2u
:
22563 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22567 case DW_OP_const2s
:
22568 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22572 case DW_OP_const4u
:
22573 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22577 case DW_OP_const4s
:
22578 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22582 case DW_OP_const8u
:
22583 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22588 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22594 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22599 stack
[stacki
+ 1] = stack
[stacki
];
22604 stack
[stacki
- 1] += stack
[stacki
];
22608 case DW_OP_plus_uconst
:
22609 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22615 stack
[stacki
- 1] -= stack
[stacki
];
22620 /* If we're not the last op, then we definitely can't encode
22621 this using GDB's address_class enum. This is valid for partial
22622 global symbols, although the variable's address will be bogus
22625 dwarf2_complex_location_expr_complaint ();
22628 case DW_OP_GNU_push_tls_address
:
22629 case DW_OP_form_tls_address
:
22630 /* The top of the stack has the offset from the beginning
22631 of the thread control block at which the variable is located. */
22632 /* Nothing should follow this operator, so the top of stack would
22634 /* This is valid for partial global symbols, but the variable's
22635 address will be bogus in the psymtab. Make it always at least
22636 non-zero to not look as a variable garbage collected by linker
22637 which have DW_OP_addr 0. */
22639 dwarf2_complex_location_expr_complaint ();
22643 case DW_OP_GNU_uninit
:
22647 case DW_OP_GNU_addr_index
:
22648 case DW_OP_GNU_const_index
:
22649 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22656 const char *name
= get_DW_OP_name (op
);
22659 complaint (_("unsupported stack op: '%s'"),
22662 complaint (_("unsupported stack op: '%02x'"),
22666 return (stack
[stacki
]);
22669 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22670 outside of the allocated space. Also enforce minimum>0. */
22671 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22673 complaint (_("location description stack overflow"));
22679 complaint (_("location description stack underflow"));
22683 return (stack
[stacki
]);
22686 /* memory allocation interface */
22688 static struct dwarf_block
*
22689 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22691 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22694 static struct die_info
*
22695 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22697 struct die_info
*die
;
22698 size_t size
= sizeof (struct die_info
);
22701 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22703 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
22704 memset (die
, 0, sizeof (struct die_info
));
22710 /* Macro support. */
22712 /* An overload of dwarf_decode_macros that finds the correct section
22713 and ensures it is read in before calling the other overload. */
22716 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22717 int section_is_gnu
)
22719 struct dwarf2_per_objfile
*dwarf2_per_objfile
22720 = cu
->per_cu
->dwarf2_per_objfile
;
22721 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22722 const struct line_header
*lh
= cu
->line_header
;
22723 unsigned int offset_size
= cu
->header
.offset_size
;
22724 struct dwarf2_section_info
*section
;
22725 const char *section_name
;
22727 if (cu
->dwo_unit
!= nullptr)
22729 if (section_is_gnu
)
22731 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22732 section_name
= ".debug_macro.dwo";
22736 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22737 section_name
= ".debug_macinfo.dwo";
22742 if (section_is_gnu
)
22744 section
= &dwarf2_per_objfile
->macro
;
22745 section_name
= ".debug_macro";
22749 section
= &dwarf2_per_objfile
->macinfo
;
22750 section_name
= ".debug_macinfo";
22754 section
->read (objfile
);
22755 if (section
->buffer
== nullptr)
22757 complaint (_("missing %s section"), section_name
);
22761 buildsym_compunit
*builder
= cu
->get_builder ();
22763 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
22764 offset_size
, offset
, section_is_gnu
);
22767 /* Return the .debug_loc section to use for CU.
22768 For DWO files use .debug_loc.dwo. */
22770 static struct dwarf2_section_info
*
22771 cu_debug_loc_section (struct dwarf2_cu
*cu
)
22773 struct dwarf2_per_objfile
*dwarf2_per_objfile
22774 = cu
->per_cu
->dwarf2_per_objfile
;
22778 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
22780 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
22782 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
22783 : &dwarf2_per_objfile
->loc
);
22786 /* A helper function that fills in a dwarf2_loclist_baton. */
22789 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
22790 struct dwarf2_loclist_baton
*baton
,
22791 const struct attribute
*attr
)
22793 struct dwarf2_per_objfile
*dwarf2_per_objfile
22794 = cu
->per_cu
->dwarf2_per_objfile
;
22795 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22797 section
->read (dwarf2_per_objfile
->objfile
);
22799 baton
->per_cu
= cu
->per_cu
;
22800 gdb_assert (baton
->per_cu
);
22801 /* We don't know how long the location list is, but make sure we
22802 don't run off the edge of the section. */
22803 baton
->size
= section
->size
- DW_UNSND (attr
);
22804 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
22805 if (cu
->base_address
.has_value ())
22806 baton
->base_address
= *cu
->base_address
;
22808 baton
->base_address
= 0;
22809 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
22813 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
22814 struct dwarf2_cu
*cu
, int is_block
)
22816 struct dwarf2_per_objfile
*dwarf2_per_objfile
22817 = cu
->per_cu
->dwarf2_per_objfile
;
22818 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22819 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22821 if (attr
->form_is_section_offset ()
22822 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
22823 the section. If so, fall through to the complaint in the
22825 && DW_UNSND (attr
) < section
->get_size (objfile
))
22827 struct dwarf2_loclist_baton
*baton
;
22829 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
22831 fill_in_loclist_baton (cu
, baton
, attr
);
22833 if (!cu
->base_address
.has_value ())
22834 complaint (_("Location list used without "
22835 "specifying the CU base address."));
22837 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22838 ? dwarf2_loclist_block_index
22839 : dwarf2_loclist_index
);
22840 SYMBOL_LOCATION_BATON (sym
) = baton
;
22844 struct dwarf2_locexpr_baton
*baton
;
22846 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
22847 baton
->per_cu
= cu
->per_cu
;
22848 gdb_assert (baton
->per_cu
);
22850 if (attr
->form_is_block ())
22852 /* Note that we're just copying the block's data pointer
22853 here, not the actual data. We're still pointing into the
22854 info_buffer for SYM's objfile; right now we never release
22855 that buffer, but when we do clean up properly this may
22857 baton
->size
= DW_BLOCK (attr
)->size
;
22858 baton
->data
= DW_BLOCK (attr
)->data
;
22862 dwarf2_invalid_attrib_class_complaint ("location description",
22863 sym
->natural_name ());
22867 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22868 ? dwarf2_locexpr_block_index
22869 : dwarf2_locexpr_index
);
22870 SYMBOL_LOCATION_BATON (sym
) = baton
;
22877 dwarf2_per_cu_data::objfile () const
22879 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22881 /* Return the master objfile, so that we can report and look up the
22882 correct file containing this variable. */
22883 if (objfile
->separate_debug_objfile_backlink
)
22884 objfile
= objfile
->separate_debug_objfile_backlink
;
22889 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
22890 (CU_HEADERP is unused in such case) or prepare a temporary copy at
22891 CU_HEADERP first. */
22893 static const struct comp_unit_head
*
22894 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
22895 const struct dwarf2_per_cu_data
*per_cu
)
22897 const gdb_byte
*info_ptr
;
22900 return &per_cu
->cu
->header
;
22902 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
22904 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
22905 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
22906 rcuh_kind::COMPILE
);
22914 dwarf2_per_cu_data::addr_size () const
22916 struct comp_unit_head cu_header_local
;
22917 const struct comp_unit_head
*cu_headerp
;
22919 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
22921 return cu_headerp
->addr_size
;
22927 dwarf2_per_cu_data::offset_size () const
22929 struct comp_unit_head cu_header_local
;
22930 const struct comp_unit_head
*cu_headerp
;
22932 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
22934 return cu_headerp
->offset_size
;
22940 dwarf2_per_cu_data::ref_addr_size () const
22942 struct comp_unit_head cu_header_local
;
22943 const struct comp_unit_head
*cu_headerp
;
22945 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
22947 if (cu_headerp
->version
== 2)
22948 return cu_headerp
->addr_size
;
22950 return cu_headerp
->offset_size
;
22956 dwarf2_per_cu_data::text_offset () const
22958 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22960 return objfile
->text_section_offset ();
22966 dwarf2_per_cu_data::addr_type () const
22968 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22969 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
22970 struct type
*addr_type
= lookup_pointer_type (void_type
);
22971 int addr_size
= this->addr_size ();
22973 if (TYPE_LENGTH (addr_type
) == addr_size
)
22976 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
22980 /* A helper function for dwarf2_find_containing_comp_unit that returns
22981 the index of the result, and that searches a vector. It will
22982 return a result even if the offset in question does not actually
22983 occur in any CU. This is separate so that it can be unit
22987 dwarf2_find_containing_comp_unit
22988 (sect_offset sect_off
,
22989 unsigned int offset_in_dwz
,
22990 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
22995 high
= all_comp_units
.size () - 1;
22998 struct dwarf2_per_cu_data
*mid_cu
;
22999 int mid
= low
+ (high
- low
) / 2;
23001 mid_cu
= all_comp_units
[mid
];
23002 if (mid_cu
->is_dwz
> offset_in_dwz
23003 || (mid_cu
->is_dwz
== offset_in_dwz
23004 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23009 gdb_assert (low
== high
);
23013 /* Locate the .debug_info compilation unit from CU's objfile which contains
23014 the DIE at OFFSET. Raises an error on failure. */
23016 static struct dwarf2_per_cu_data
*
23017 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23018 unsigned int offset_in_dwz
,
23019 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23022 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23023 dwarf2_per_objfile
->all_comp_units
);
23024 struct dwarf2_per_cu_data
*this_cu
23025 = dwarf2_per_objfile
->all_comp_units
[low
];
23027 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23029 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23030 error (_("Dwarf Error: could not find partial DIE containing "
23031 "offset %s [in module %s]"),
23032 sect_offset_str (sect_off
),
23033 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23035 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23037 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23041 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23042 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23043 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23044 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23051 namespace selftests
{
23052 namespace find_containing_comp_unit
{
23057 struct dwarf2_per_cu_data one
{};
23058 struct dwarf2_per_cu_data two
{};
23059 struct dwarf2_per_cu_data three
{};
23060 struct dwarf2_per_cu_data four
{};
23063 two
.sect_off
= sect_offset (one
.length
);
23068 four
.sect_off
= sect_offset (three
.length
);
23072 std::vector
<dwarf2_per_cu_data
*> units
;
23073 units
.push_back (&one
);
23074 units
.push_back (&two
);
23075 units
.push_back (&three
);
23076 units
.push_back (&four
);
23080 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23081 SELF_CHECK (units
[result
] == &one
);
23082 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23083 SELF_CHECK (units
[result
] == &one
);
23084 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23085 SELF_CHECK (units
[result
] == &two
);
23087 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23088 SELF_CHECK (units
[result
] == &three
);
23089 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23090 SELF_CHECK (units
[result
] == &three
);
23091 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23092 SELF_CHECK (units
[result
] == &four
);
23098 #endif /* GDB_SELF_TEST */
23100 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23102 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23103 : per_cu (per_cu_
),
23105 has_loclist (false),
23106 checked_producer (false),
23107 producer_is_gxx_lt_4_6 (false),
23108 producer_is_gcc_lt_4_3 (false),
23109 producer_is_icc (false),
23110 producer_is_icc_lt_14 (false),
23111 producer_is_codewarrior (false),
23112 processing_has_namespace_info (false)
23117 /* Destroy a dwarf2_cu. */
23119 dwarf2_cu::~dwarf2_cu ()
23124 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23127 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23128 enum language pretend_language
)
23130 struct attribute
*attr
;
23132 /* Set the language we're debugging. */
23133 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23134 if (attr
!= nullptr)
23135 set_cu_language (DW_UNSND (attr
), cu
);
23138 cu
->language
= pretend_language
;
23139 cu
->language_defn
= language_def (cu
->language
);
23142 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23145 /* Increase the age counter on each cached compilation unit, and free
23146 any that are too old. */
23149 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23151 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23153 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23154 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23155 while (per_cu
!= NULL
)
23157 per_cu
->cu
->last_used
++;
23158 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23159 dwarf2_mark (per_cu
->cu
);
23160 per_cu
= per_cu
->cu
->read_in_chain
;
23163 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23164 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23165 while (per_cu
!= NULL
)
23167 struct dwarf2_per_cu_data
*next_cu
;
23169 next_cu
= per_cu
->cu
->read_in_chain
;
23171 if (!per_cu
->cu
->mark
)
23174 *last_chain
= next_cu
;
23177 last_chain
= &per_cu
->cu
->read_in_chain
;
23183 /* Remove a single compilation unit from the cache. */
23186 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23188 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23189 struct dwarf2_per_objfile
*dwarf2_per_objfile
23190 = target_per_cu
->dwarf2_per_objfile
;
23192 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23193 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23194 while (per_cu
!= NULL
)
23196 struct dwarf2_per_cu_data
*next_cu
;
23198 next_cu
= per_cu
->cu
->read_in_chain
;
23200 if (per_cu
== target_per_cu
)
23204 *last_chain
= next_cu
;
23208 last_chain
= &per_cu
->cu
->read_in_chain
;
23214 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23215 We store these in a hash table separate from the DIEs, and preserve them
23216 when the DIEs are flushed out of cache.
23218 The CU "per_cu" pointer is needed because offset alone is not enough to
23219 uniquely identify the type. A file may have multiple .debug_types sections,
23220 or the type may come from a DWO file. Furthermore, while it's more logical
23221 to use per_cu->section+offset, with Fission the section with the data is in
23222 the DWO file but we don't know that section at the point we need it.
23223 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23224 because we can enter the lookup routine, get_die_type_at_offset, from
23225 outside this file, and thus won't necessarily have PER_CU->cu.
23226 Fortunately, PER_CU is stable for the life of the objfile. */
23228 struct dwarf2_per_cu_offset_and_type
23230 const struct dwarf2_per_cu_data
*per_cu
;
23231 sect_offset sect_off
;
23235 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23238 per_cu_offset_and_type_hash (const void *item
)
23240 const struct dwarf2_per_cu_offset_and_type
*ofs
23241 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23243 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23246 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23249 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23251 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23252 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23253 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23254 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23256 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23257 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23260 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23261 table if necessary. For convenience, return TYPE.
23263 The DIEs reading must have careful ordering to:
23264 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23265 reading current DIE.
23266 * Not trying to dereference contents of still incompletely read in types
23267 while reading in other DIEs.
23268 * Enable referencing still incompletely read in types just by a pointer to
23269 the type without accessing its fields.
23271 Therefore caller should follow these rules:
23272 * Try to fetch any prerequisite types we may need to build this DIE type
23273 before building the type and calling set_die_type.
23274 * After building type call set_die_type for current DIE as soon as
23275 possible before fetching more types to complete the current type.
23276 * Make the type as complete as possible before fetching more types. */
23278 static struct type
*
23279 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23281 struct dwarf2_per_objfile
*dwarf2_per_objfile
23282 = cu
->per_cu
->dwarf2_per_objfile
;
23283 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23284 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23285 struct attribute
*attr
;
23286 struct dynamic_prop prop
;
23288 /* For Ada types, make sure that the gnat-specific data is always
23289 initialized (if not already set). There are a few types where
23290 we should not be doing so, because the type-specific area is
23291 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23292 where the type-specific area is used to store the floatformat).
23293 But this is not a problem, because the gnat-specific information
23294 is actually not needed for these types. */
23295 if (need_gnat_info (cu
)
23296 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23297 && TYPE_CODE (type
) != TYPE_CODE_FLT
23298 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23299 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23300 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23301 && !HAVE_GNAT_AUX_INFO (type
))
23302 INIT_GNAT_SPECIFIC (type
);
23304 /* Read DW_AT_allocated and set in type. */
23305 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23306 if (attr
!= NULL
&& attr
->form_is_block ())
23308 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23309 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23310 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
23312 else if (attr
!= NULL
)
23314 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23315 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23316 sect_offset_str (die
->sect_off
));
23319 /* Read DW_AT_associated and set in type. */
23320 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23321 if (attr
!= NULL
&& attr
->form_is_block ())
23323 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23324 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23325 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
23327 else if (attr
!= NULL
)
23329 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23330 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23331 sect_offset_str (die
->sect_off
));
23334 /* Read DW_AT_data_location and set in type. */
23335 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23336 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23337 cu
->per_cu
->addr_type ()))
23338 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
23340 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23341 dwarf2_per_objfile
->die_type_hash
23342 = htab_up (htab_create_alloc (127,
23343 per_cu_offset_and_type_hash
,
23344 per_cu_offset_and_type_eq
,
23345 NULL
, xcalloc
, xfree
));
23347 ofs
.per_cu
= cu
->per_cu
;
23348 ofs
.sect_off
= die
->sect_off
;
23350 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23351 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23353 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23354 sect_offset_str (die
->sect_off
));
23355 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23356 struct dwarf2_per_cu_offset_and_type
);
23361 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23362 or return NULL if the die does not have a saved type. */
23364 static struct type
*
23365 get_die_type_at_offset (sect_offset sect_off
,
23366 struct dwarf2_per_cu_data
*per_cu
)
23368 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23369 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23371 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23374 ofs
.per_cu
= per_cu
;
23375 ofs
.sect_off
= sect_off
;
23376 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23377 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23384 /* Look up the type for DIE in CU in die_type_hash,
23385 or return NULL if DIE does not have a saved type. */
23387 static struct type
*
23388 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23390 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23393 /* Add a dependence relationship from CU to REF_PER_CU. */
23396 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23397 struct dwarf2_per_cu_data
*ref_per_cu
)
23401 if (cu
->dependencies
== NULL
)
23403 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23404 NULL
, &cu
->comp_unit_obstack
,
23405 hashtab_obstack_allocate
,
23406 dummy_obstack_deallocate
);
23408 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23410 *slot
= ref_per_cu
;
23413 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23414 Set the mark field in every compilation unit in the
23415 cache that we must keep because we are keeping CU. */
23418 dwarf2_mark_helper (void **slot
, void *data
)
23420 struct dwarf2_per_cu_data
*per_cu
;
23422 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23424 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23425 reading of the chain. As such dependencies remain valid it is not much
23426 useful to track and undo them during QUIT cleanups. */
23427 if (per_cu
->cu
== NULL
)
23430 if (per_cu
->cu
->mark
)
23432 per_cu
->cu
->mark
= true;
23434 if (per_cu
->cu
->dependencies
!= NULL
)
23435 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23440 /* Set the mark field in CU and in every other compilation unit in the
23441 cache that we must keep because we are keeping CU. */
23444 dwarf2_mark (struct dwarf2_cu
*cu
)
23449 if (cu
->dependencies
!= NULL
)
23450 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23454 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23458 per_cu
->cu
->mark
= false;
23459 per_cu
= per_cu
->cu
->read_in_chain
;
23463 /* Trivial hash function for partial_die_info: the hash value of a DIE
23464 is its offset in .debug_info for this objfile. */
23467 partial_die_hash (const void *item
)
23469 const struct partial_die_info
*part_die
23470 = (const struct partial_die_info
*) item
;
23472 return to_underlying (part_die
->sect_off
);
23475 /* Trivial comparison function for partial_die_info structures: two DIEs
23476 are equal if they have the same offset. */
23479 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23481 const struct partial_die_info
*part_die_lhs
23482 = (const struct partial_die_info
*) item_lhs
;
23483 const struct partial_die_info
*part_die_rhs
23484 = (const struct partial_die_info
*) item_rhs
;
23486 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23489 struct cmd_list_element
*set_dwarf_cmdlist
;
23490 struct cmd_list_element
*show_dwarf_cmdlist
;
23493 show_check_physname (struct ui_file
*file
, int from_tty
,
23494 struct cmd_list_element
*c
, const char *value
)
23496 fprintf_filtered (file
,
23497 _("Whether to check \"physname\" is %s.\n"),
23501 void _initialize_dwarf2_read ();
23503 _initialize_dwarf2_read ()
23505 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23506 Set DWARF specific variables.\n\
23507 Configure DWARF variables such as the cache size."),
23508 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23509 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23511 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23512 Show DWARF specific variables.\n\
23513 Show DWARF variables such as the cache size."),
23514 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23515 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23517 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23518 &dwarf_max_cache_age
, _("\
23519 Set the upper bound on the age of cached DWARF compilation units."), _("\
23520 Show the upper bound on the age of cached DWARF compilation units."), _("\
23521 A higher limit means that cached compilation units will be stored\n\
23522 in memory longer, and more total memory will be used. Zero disables\n\
23523 caching, which can slow down startup."),
23525 show_dwarf_max_cache_age
,
23526 &set_dwarf_cmdlist
,
23527 &show_dwarf_cmdlist
);
23529 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23530 Set debugging of the DWARF reader."), _("\
23531 Show debugging of the DWARF reader."), _("\
23532 When enabled (non-zero), debugging messages are printed during DWARF\n\
23533 reading and symtab expansion. A value of 1 (one) provides basic\n\
23534 information. A value greater than 1 provides more verbose information."),
23537 &setdebuglist
, &showdebuglist
);
23539 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23540 Set debugging of the DWARF DIE reader."), _("\
23541 Show debugging of the DWARF DIE reader."), _("\
23542 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23543 The value is the maximum depth to print."),
23546 &setdebuglist
, &showdebuglist
);
23548 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23549 Set debugging of the dwarf line reader."), _("\
23550 Show debugging of the dwarf line reader."), _("\
23551 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23552 A value of 1 (one) provides basic information.\n\
23553 A value greater than 1 provides more verbose information."),
23556 &setdebuglist
, &showdebuglist
);
23558 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23559 Set cross-checking of \"physname\" code against demangler."), _("\
23560 Show cross-checking of \"physname\" code against demangler."), _("\
23561 When enabled, GDB's internal \"physname\" code is checked against\n\
23563 NULL
, show_check_physname
,
23564 &setdebuglist
, &showdebuglist
);
23566 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23567 no_class
, &use_deprecated_index_sections
, _("\
23568 Set whether to use deprecated gdb_index sections."), _("\
23569 Show whether to use deprecated gdb_index sections."), _("\
23570 When enabled, deprecated .gdb_index sections are used anyway.\n\
23571 Normally they are ignored either because of a missing feature or\n\
23572 performance issue.\n\
23573 Warning: This option must be enabled before gdb reads the file."),
23576 &setlist
, &showlist
);
23578 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23579 &dwarf2_locexpr_funcs
);
23580 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23581 &dwarf2_loclist_funcs
);
23583 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23584 &dwarf2_block_frame_base_locexpr_funcs
);
23585 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23586 &dwarf2_block_frame_base_loclist_funcs
);
23589 selftests::register_test ("dw2_expand_symtabs_matching",
23590 selftests::dw2_expand_symtabs_matching::run_test
);
23591 selftests::register_test ("dwarf2_find_containing_comp_unit",
23592 selftests::find_containing_comp_unit::run_test
);