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 struct variant_part_builder
;
1087 /* When reading a variant, we track a bit more information about the
1088 field, and store it in an object of this type. */
1090 struct variant_field
1092 int first_field
= -1;
1093 int last_field
= -1;
1095 /* A variant can contain other variant parts. */
1096 std::vector
<variant_part_builder
> variant_parts
;
1098 /* If we see a DW_TAG_variant, then this will be set if this is the
1100 bool default_branch
= false;
1101 /* If we see a DW_AT_discr_value, then this will be the discriminant
1103 ULONGEST discriminant_value
= 0;
1104 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1106 struct dwarf_block
*discr_list_data
= nullptr;
1109 /* This represents a DW_TAG_variant_part. */
1111 struct variant_part_builder
1113 /* The offset of the discriminant field. */
1114 sect_offset discriminant_offset
{};
1116 /* Variants that are direct children of this variant part. */
1117 std::vector
<variant_field
> variants
;
1119 /* True if we're currently reading a variant. */
1120 bool processing_variant
= false;
1125 int accessibility
= 0;
1127 /* Variant parts need to find the discriminant, which is a DIE
1128 reference. We track the section offset of each field to make
1131 struct field field
{};
1136 const char *name
= nullptr;
1137 std::vector
<struct fn_field
> fnfields
;
1140 /* The routines that read and process dies for a C struct or C++ class
1141 pass lists of data member fields and lists of member function fields
1142 in an instance of a field_info structure, as defined below. */
1145 /* List of data member and baseclasses fields. */
1146 std::vector
<struct nextfield
> fields
;
1147 std::vector
<struct nextfield
> baseclasses
;
1149 /* Set if the accessibility of one of the fields is not public. */
1150 int non_public_fields
= 0;
1152 /* Member function fieldlist array, contains name of possibly overloaded
1153 member function, number of overloaded member functions and a pointer
1154 to the head of the member function field chain. */
1155 std::vector
<struct fnfieldlist
> fnfieldlists
;
1157 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1158 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1159 std::vector
<struct decl_field
> typedef_field_list
;
1161 /* Nested types defined by this class and the number of elements in this
1163 std::vector
<struct decl_field
> nested_types_list
;
1165 /* If non-null, this is the variant part we are currently
1167 variant_part_builder
*current_variant_part
= nullptr;
1168 /* This holds all the top-level variant parts attached to the type
1170 std::vector
<variant_part_builder
> variant_parts
;
1172 /* Return the total number of fields (including baseclasses). */
1173 int nfields () const
1175 return fields
.size () + baseclasses
.size ();
1179 /* Loaded secondary compilation units are kept in memory until they
1180 have not been referenced for the processing of this many
1181 compilation units. Set this to zero to disable caching. Cache
1182 sizes of up to at least twenty will improve startup time for
1183 typical inter-CU-reference binaries, at an obvious memory cost. */
1184 static int dwarf_max_cache_age
= 5;
1186 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1187 struct cmd_list_element
*c
, const char *value
)
1189 fprintf_filtered (file
, _("The upper bound on the age of cached "
1190 "DWARF compilation units is %s.\n"),
1194 /* local function prototypes */
1196 static void dwarf2_find_base_address (struct die_info
*die
,
1197 struct dwarf2_cu
*cu
);
1199 static dwarf2_psymtab
*create_partial_symtab
1200 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1202 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1203 const gdb_byte
*info_ptr
,
1204 struct die_info
*type_unit_die
);
1206 static void dwarf2_build_psymtabs_hard
1207 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1209 static void scan_partial_symbols (struct partial_die_info
*,
1210 CORE_ADDR
*, CORE_ADDR
*,
1211 int, struct dwarf2_cu
*);
1213 static void add_partial_symbol (struct partial_die_info
*,
1214 struct dwarf2_cu
*);
1216 static void add_partial_namespace (struct partial_die_info
*pdi
,
1217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1218 int set_addrmap
, struct dwarf2_cu
*cu
);
1220 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1221 CORE_ADDR
*highpc
, int set_addrmap
,
1222 struct dwarf2_cu
*cu
);
1224 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1225 struct dwarf2_cu
*cu
);
1227 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1228 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1229 int need_pc
, struct dwarf2_cu
*cu
);
1231 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1233 static struct partial_die_info
*load_partial_dies
1234 (const struct die_reader_specs
*, const gdb_byte
*, int);
1236 /* A pair of partial_die_info and compilation unit. */
1237 struct cu_partial_die_info
1239 /* The compilation unit of the partial_die_info. */
1240 struct dwarf2_cu
*cu
;
1241 /* A partial_die_info. */
1242 struct partial_die_info
*pdi
;
1244 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1250 cu_partial_die_info () = delete;
1253 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1254 struct dwarf2_cu
*);
1256 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1257 struct attribute
*, struct attr_abbrev
*,
1258 const gdb_byte
*, bool *need_reprocess
);
1260 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1261 struct attribute
*attr
);
1263 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1265 static sect_offset read_abbrev_offset
1266 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1267 struct dwarf2_section_info
*, sect_offset
);
1269 static const char *read_indirect_string
1270 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1271 const struct comp_unit_head
*, unsigned int *);
1273 static const char *read_indirect_string_at_offset
1274 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1276 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1280 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1281 ULONGEST str_index
);
1283 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1284 ULONGEST str_index
);
1286 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1288 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1289 struct dwarf2_cu
*);
1291 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1292 struct dwarf2_cu
*cu
);
1294 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1296 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1297 struct dwarf2_cu
*cu
);
1299 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1301 static struct die_info
*die_specification (struct die_info
*die
,
1302 struct dwarf2_cu
**);
1304 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1305 struct dwarf2_cu
*cu
);
1307 static void dwarf_decode_lines (struct line_header
*, const char *,
1308 struct dwarf2_cu
*, dwarf2_psymtab
*,
1309 CORE_ADDR
, int decode_mapping
);
1311 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1314 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1315 struct dwarf2_cu
*, struct symbol
* = NULL
);
1317 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1318 struct dwarf2_cu
*);
1320 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1323 struct obstack
*obstack
,
1324 struct dwarf2_cu
*cu
, LONGEST
*value
,
1325 const gdb_byte
**bytes
,
1326 struct dwarf2_locexpr_baton
**baton
);
1328 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1330 static int need_gnat_info (struct dwarf2_cu
*);
1332 static struct type
*die_descriptive_type (struct die_info
*,
1333 struct dwarf2_cu
*);
1335 static void set_descriptive_type (struct type
*, struct die_info
*,
1336 struct dwarf2_cu
*);
1338 static struct type
*die_containing_type (struct die_info
*,
1339 struct dwarf2_cu
*);
1341 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1342 struct dwarf2_cu
*);
1344 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1346 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1348 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1350 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1351 const char *suffix
, int physname
,
1352 struct dwarf2_cu
*cu
);
1354 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1356 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1358 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1360 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1362 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1364 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1366 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1367 struct dwarf2_cu
*, dwarf2_psymtab
*);
1369 /* Return the .debug_loclists section to use for cu. */
1370 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1372 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1373 values. Keep the items ordered with increasing constraints compliance. */
1376 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1377 PC_BOUNDS_NOT_PRESENT
,
1379 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1380 were present but they do not form a valid range of PC addresses. */
1383 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1386 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1390 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1391 CORE_ADDR
*, CORE_ADDR
*,
1395 static void get_scope_pc_bounds (struct die_info
*,
1396 CORE_ADDR
*, CORE_ADDR
*,
1397 struct dwarf2_cu
*);
1399 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1400 CORE_ADDR
, struct dwarf2_cu
*);
1402 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1403 struct dwarf2_cu
*);
1405 static void dwarf2_attach_fields_to_type (struct field_info
*,
1406 struct type
*, struct dwarf2_cu
*);
1408 static void dwarf2_add_member_fn (struct field_info
*,
1409 struct die_info
*, struct type
*,
1410 struct dwarf2_cu
*);
1412 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1414 struct dwarf2_cu
*);
1416 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1418 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1420 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1422 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1424 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1426 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1428 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1430 static struct type
*read_module_type (struct die_info
*die
,
1431 struct dwarf2_cu
*cu
);
1433 static const char *namespace_name (struct die_info
*die
,
1434 int *is_anonymous
, struct dwarf2_cu
*);
1436 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1438 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1441 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1442 struct dwarf2_cu
*);
1444 static struct die_info
*read_die_and_siblings_1
1445 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1448 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1449 const gdb_byte
*info_ptr
,
1450 const gdb_byte
**new_info_ptr
,
1451 struct die_info
*parent
);
1453 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1454 struct die_info
**, const gdb_byte
*,
1457 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1458 struct die_info
**, const gdb_byte
*);
1460 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1462 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1465 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1467 static const char *dwarf2_full_name (const char *name
,
1468 struct die_info
*die
,
1469 struct dwarf2_cu
*cu
);
1471 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1472 struct dwarf2_cu
*cu
);
1474 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1475 struct dwarf2_cu
**);
1477 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1479 static void dump_die_for_error (struct die_info
*);
1481 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1484 /*static*/ void dump_die (struct die_info
*, int max_level
);
1486 static void store_in_ref_table (struct die_info
*,
1487 struct dwarf2_cu
*);
1489 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1490 const struct attribute
*,
1491 struct dwarf2_cu
**);
1493 static struct die_info
*follow_die_ref (struct die_info
*,
1494 const struct attribute
*,
1495 struct dwarf2_cu
**);
1497 static struct die_info
*follow_die_sig (struct die_info
*,
1498 const struct attribute
*,
1499 struct dwarf2_cu
**);
1501 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1502 struct dwarf2_cu
*);
1504 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1505 const struct attribute
*,
1506 struct dwarf2_cu
*);
1508 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1510 static void read_signatured_type (struct signatured_type
*);
1512 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1513 struct die_info
*die
, struct dwarf2_cu
*cu
,
1514 struct dynamic_prop
*prop
, struct type
*type
);
1516 /* memory allocation interface */
1518 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1520 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1522 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1524 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1525 struct dwarf2_loclist_baton
*baton
,
1526 const struct attribute
*attr
);
1528 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1530 struct dwarf2_cu
*cu
,
1533 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1534 const gdb_byte
*info_ptr
,
1535 struct abbrev_info
*abbrev
);
1537 static hashval_t
partial_die_hash (const void *item
);
1539 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1541 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1542 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1543 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1545 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1546 struct die_info
*comp_unit_die
,
1547 enum language pretend_language
);
1549 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1551 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1553 static struct type
*set_die_type (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*);
1556 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1558 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1560 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1563 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1566 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1569 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1570 struct dwarf2_per_cu_data
*);
1572 static void dwarf2_mark (struct dwarf2_cu
*);
1574 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1576 static struct type
*get_die_type_at_offset (sect_offset
,
1577 struct dwarf2_per_cu_data
*);
1579 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1581 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1582 enum language pretend_language
);
1584 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1586 /* Class, the destructor of which frees all allocated queue entries. This
1587 will only have work to do if an error was thrown while processing the
1588 dwarf. If no error was thrown then the queue entries should have all
1589 been processed, and freed, as we went along. */
1591 class dwarf2_queue_guard
1594 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1595 : m_per_objfile (per_objfile
)
1599 /* Free any entries remaining on the queue. There should only be
1600 entries left if we hit an error while processing the dwarf. */
1601 ~dwarf2_queue_guard ()
1603 /* Ensure that no memory is allocated by the queue. */
1604 std::queue
<dwarf2_queue_item
> empty
;
1605 std::swap (m_per_objfile
->queue
, empty
);
1608 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1611 dwarf2_per_objfile
*m_per_objfile
;
1614 dwarf2_queue_item::~dwarf2_queue_item ()
1616 /* Anything still marked queued is likely to be in an
1617 inconsistent state, so discard it. */
1620 if (per_cu
->cu
!= NULL
)
1621 free_one_cached_comp_unit (per_cu
);
1626 /* The return type of find_file_and_directory. Note, the enclosed
1627 string pointers are only valid while this object is valid. */
1629 struct file_and_directory
1631 /* The filename. This is never NULL. */
1634 /* The compilation directory. NULL if not known. If we needed to
1635 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1636 points directly to the DW_AT_comp_dir string attribute owned by
1637 the obstack that owns the DIE. */
1638 const char *comp_dir
;
1640 /* If we needed to build a new string for comp_dir, this is what
1641 owns the storage. */
1642 std::string comp_dir_storage
;
1645 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1646 struct dwarf2_cu
*cu
);
1648 static htab_up
allocate_signatured_type_table ();
1650 static htab_up
allocate_dwo_unit_table ();
1652 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1653 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1654 struct dwp_file
*dwp_file
, const char *comp_dir
,
1655 ULONGEST signature
, int is_debug_types
);
1657 static struct dwp_file
*get_dwp_file
1658 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1660 static struct dwo_unit
*lookup_dwo_comp_unit
1661 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1663 static struct dwo_unit
*lookup_dwo_type_unit
1664 (struct signatured_type
*, const char *, const char *);
1666 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1668 /* A unique pointer to a dwo_file. */
1670 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1672 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1674 static void check_producer (struct dwarf2_cu
*cu
);
1676 static void free_line_header_voidp (void *arg
);
1678 /* Various complaints about symbol reading that don't abort the process. */
1681 dwarf2_debug_line_missing_file_complaint (void)
1683 complaint (_(".debug_line section has line data without a file"));
1687 dwarf2_debug_line_missing_end_sequence_complaint (void)
1689 complaint (_(".debug_line section has line "
1690 "program sequence without an end"));
1694 dwarf2_complex_location_expr_complaint (void)
1696 complaint (_("location expression too complex"));
1700 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1703 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1708 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1710 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1714 /* Hash function for line_header_hash. */
1717 line_header_hash (const struct line_header
*ofs
)
1719 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1722 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1725 line_header_hash_voidp (const void *item
)
1727 const struct line_header
*ofs
= (const struct line_header
*) item
;
1729 return line_header_hash (ofs
);
1732 /* Equality function for line_header_hash. */
1735 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1737 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1738 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1740 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1741 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1746 /* See declaration. */
1748 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1749 const dwarf2_debug_sections
*names
,
1751 : objfile (objfile_
),
1752 can_copy (can_copy_
)
1755 names
= &dwarf2_elf_names
;
1757 bfd
*obfd
= objfile
->obfd
;
1759 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1760 locate_sections (obfd
, sec
, *names
);
1763 dwarf2_per_objfile::~dwarf2_per_objfile ()
1765 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1766 free_cached_comp_units ();
1768 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1769 per_cu
->imported_symtabs_free ();
1771 for (signatured_type
*sig_type
: all_type_units
)
1772 sig_type
->per_cu
.imported_symtabs_free ();
1774 /* Everything else should be on the objfile obstack. */
1777 /* See declaration. */
1780 dwarf2_per_objfile::free_cached_comp_units ()
1782 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1783 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1784 while (per_cu
!= NULL
)
1786 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1789 *last_chain
= next_cu
;
1794 /* A helper class that calls free_cached_comp_units on
1797 class free_cached_comp_units
1801 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1802 : m_per_objfile (per_objfile
)
1806 ~free_cached_comp_units ()
1808 m_per_objfile
->free_cached_comp_units ();
1811 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1815 dwarf2_per_objfile
*m_per_objfile
;
1818 /* Try to locate the sections we need for DWARF 2 debugging
1819 information and return true if we have enough to do something.
1820 NAMES points to the dwarf2 section names, or is NULL if the standard
1821 ELF names are used. CAN_COPY is true for formats where symbol
1822 interposition is possible and so symbol values must follow copy
1823 relocation rules. */
1826 dwarf2_has_info (struct objfile
*objfile
,
1827 const struct dwarf2_debug_sections
*names
,
1830 if (objfile
->flags
& OBJF_READNEVER
)
1833 struct dwarf2_per_objfile
*dwarf2_per_objfile
1834 = get_dwarf2_per_objfile (objfile
);
1836 if (dwarf2_per_objfile
== NULL
)
1837 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
1841 return (!dwarf2_per_objfile
->info
.is_virtual
1842 && dwarf2_per_objfile
->info
.s
.section
!= NULL
1843 && !dwarf2_per_objfile
->abbrev
.is_virtual
1844 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
1847 /* When loading sections, we look either for uncompressed section or for
1848 compressed section names. */
1851 section_is_p (const char *section_name
,
1852 const struct dwarf2_section_names
*names
)
1854 if (names
->normal
!= NULL
1855 && strcmp (section_name
, names
->normal
) == 0)
1857 if (names
->compressed
!= NULL
1858 && strcmp (section_name
, names
->compressed
) == 0)
1863 /* See declaration. */
1866 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
1867 const dwarf2_debug_sections
&names
)
1869 flagword aflag
= bfd_section_flags (sectp
);
1871 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1874 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1875 > bfd_get_file_size (abfd
))
1877 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1878 warning (_("Discarding section %s which has a section size (%s"
1879 ") larger than the file size [in module %s]"),
1880 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1881 bfd_get_filename (abfd
));
1883 else if (section_is_p (sectp
->name
, &names
.info
))
1885 this->info
.s
.section
= sectp
;
1886 this->info
.size
= bfd_section_size (sectp
);
1888 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1890 this->abbrev
.s
.section
= sectp
;
1891 this->abbrev
.size
= bfd_section_size (sectp
);
1893 else if (section_is_p (sectp
->name
, &names
.line
))
1895 this->line
.s
.section
= sectp
;
1896 this->line
.size
= bfd_section_size (sectp
);
1898 else if (section_is_p (sectp
->name
, &names
.loc
))
1900 this->loc
.s
.section
= sectp
;
1901 this->loc
.size
= bfd_section_size (sectp
);
1903 else if (section_is_p (sectp
->name
, &names
.loclists
))
1905 this->loclists
.s
.section
= sectp
;
1906 this->loclists
.size
= bfd_section_size (sectp
);
1908 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1910 this->macinfo
.s
.section
= sectp
;
1911 this->macinfo
.size
= bfd_section_size (sectp
);
1913 else if (section_is_p (sectp
->name
, &names
.macro
))
1915 this->macro
.s
.section
= sectp
;
1916 this->macro
.size
= bfd_section_size (sectp
);
1918 else if (section_is_p (sectp
->name
, &names
.str
))
1920 this->str
.s
.section
= sectp
;
1921 this->str
.size
= bfd_section_size (sectp
);
1923 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1925 this->str_offsets
.s
.section
= sectp
;
1926 this->str_offsets
.size
= bfd_section_size (sectp
);
1928 else if (section_is_p (sectp
->name
, &names
.line_str
))
1930 this->line_str
.s
.section
= sectp
;
1931 this->line_str
.size
= bfd_section_size (sectp
);
1933 else if (section_is_p (sectp
->name
, &names
.addr
))
1935 this->addr
.s
.section
= sectp
;
1936 this->addr
.size
= bfd_section_size (sectp
);
1938 else if (section_is_p (sectp
->name
, &names
.frame
))
1940 this->frame
.s
.section
= sectp
;
1941 this->frame
.size
= bfd_section_size (sectp
);
1943 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1945 this->eh_frame
.s
.section
= sectp
;
1946 this->eh_frame
.size
= bfd_section_size (sectp
);
1948 else if (section_is_p (sectp
->name
, &names
.ranges
))
1950 this->ranges
.s
.section
= sectp
;
1951 this->ranges
.size
= bfd_section_size (sectp
);
1953 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1955 this->rnglists
.s
.section
= sectp
;
1956 this->rnglists
.size
= bfd_section_size (sectp
);
1958 else if (section_is_p (sectp
->name
, &names
.types
))
1960 struct dwarf2_section_info type_section
;
1962 memset (&type_section
, 0, sizeof (type_section
));
1963 type_section
.s
.section
= sectp
;
1964 type_section
.size
= bfd_section_size (sectp
);
1966 this->types
.push_back (type_section
);
1968 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
1970 this->gdb_index
.s
.section
= sectp
;
1971 this->gdb_index
.size
= bfd_section_size (sectp
);
1973 else if (section_is_p (sectp
->name
, &names
.debug_names
))
1975 this->debug_names
.s
.section
= sectp
;
1976 this->debug_names
.size
= bfd_section_size (sectp
);
1978 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
1980 this->debug_aranges
.s
.section
= sectp
;
1981 this->debug_aranges
.size
= bfd_section_size (sectp
);
1984 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
1985 && bfd_section_vma (sectp
) == 0)
1986 this->has_section_at_zero
= true;
1989 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1993 dwarf2_get_section_info (struct objfile
*objfile
,
1994 enum dwarf2_section_enum sect
,
1995 asection
**sectp
, const gdb_byte
**bufp
,
1996 bfd_size_type
*sizep
)
1998 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
1999 struct dwarf2_section_info
*info
;
2001 /* We may see an objfile without any DWARF, in which case we just
2012 case DWARF2_DEBUG_FRAME
:
2013 info
= &data
->frame
;
2015 case DWARF2_EH_FRAME
:
2016 info
= &data
->eh_frame
;
2019 gdb_assert_not_reached ("unexpected section");
2022 info
->read (objfile
);
2024 *sectp
= info
->get_bfd_section ();
2025 *bufp
= info
->buffer
;
2026 *sizep
= info
->size
;
2029 /* A helper function to find the sections for a .dwz file. */
2032 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2034 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2036 /* Note that we only support the standard ELF names, because .dwz
2037 is ELF-only (at the time of writing). */
2038 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2040 dwz_file
->abbrev
.s
.section
= sectp
;
2041 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2043 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2045 dwz_file
->info
.s
.section
= sectp
;
2046 dwz_file
->info
.size
= bfd_section_size (sectp
);
2048 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2050 dwz_file
->str
.s
.section
= sectp
;
2051 dwz_file
->str
.size
= bfd_section_size (sectp
);
2053 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2055 dwz_file
->line
.s
.section
= sectp
;
2056 dwz_file
->line
.size
= bfd_section_size (sectp
);
2058 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2060 dwz_file
->macro
.s
.section
= sectp
;
2061 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2063 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2065 dwz_file
->gdb_index
.s
.section
= sectp
;
2066 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2068 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2070 dwz_file
->debug_names
.s
.section
= sectp
;
2071 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2075 /* See dwarf2read.h. */
2078 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2080 const char *filename
;
2081 bfd_size_type buildid_len_arg
;
2085 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2086 return dwarf2_per_objfile
->dwz_file
.get ();
2088 bfd_set_error (bfd_error_no_error
);
2089 gdb::unique_xmalloc_ptr
<char> data
2090 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2091 &buildid_len_arg
, &buildid
));
2094 if (bfd_get_error () == bfd_error_no_error
)
2096 error (_("could not read '.gnu_debugaltlink' section: %s"),
2097 bfd_errmsg (bfd_get_error ()));
2100 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2102 buildid_len
= (size_t) buildid_len_arg
;
2104 filename
= data
.get ();
2106 std::string abs_storage
;
2107 if (!IS_ABSOLUTE_PATH (filename
))
2109 gdb::unique_xmalloc_ptr
<char> abs
2110 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2112 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2113 filename
= abs_storage
.c_str ();
2116 /* First try the file name given in the section. If that doesn't
2117 work, try to use the build-id instead. */
2118 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2119 if (dwz_bfd
!= NULL
)
2121 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2122 dwz_bfd
.reset (nullptr);
2125 if (dwz_bfd
== NULL
)
2126 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2128 if (dwz_bfd
== nullptr)
2130 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2131 const char *origname
= dwarf2_per_objfile
->objfile
->original_name
;
2133 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2140 /* File successfully retrieved from server. */
2141 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
, -1);
2143 if (dwz_bfd
== nullptr)
2144 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2145 alt_filename
.get ());
2146 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2147 dwz_bfd
.reset (nullptr);
2151 if (dwz_bfd
== NULL
)
2152 error (_("could not find '.gnu_debugaltlink' file for %s"),
2153 objfile_name (dwarf2_per_objfile
->objfile
));
2155 std::unique_ptr
<struct dwz_file
> result
2156 (new struct dwz_file (std::move (dwz_bfd
)));
2158 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2161 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2162 result
->dwz_bfd
.get ());
2163 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2164 return dwarf2_per_objfile
->dwz_file
.get ();
2167 /* DWARF quick_symbols_functions support. */
2169 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2170 unique line tables, so we maintain a separate table of all .debug_line
2171 derived entries to support the sharing.
2172 All the quick functions need is the list of file names. We discard the
2173 line_header when we're done and don't need to record it here. */
2174 struct quick_file_names
2176 /* The data used to construct the hash key. */
2177 struct stmt_list_hash hash
;
2179 /* The number of entries in file_names, real_names. */
2180 unsigned int num_file_names
;
2182 /* The file names from the line table, after being run through
2184 const char **file_names
;
2186 /* The file names from the line table after being run through
2187 gdb_realpath. These are computed lazily. */
2188 const char **real_names
;
2191 /* When using the index (and thus not using psymtabs), each CU has an
2192 object of this type. This is used to hold information needed by
2193 the various "quick" methods. */
2194 struct dwarf2_per_cu_quick_data
2196 /* The file table. This can be NULL if there was no file table
2197 or it's currently not read in.
2198 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2199 struct quick_file_names
*file_names
;
2201 /* The corresponding symbol table. This is NULL if symbols for this
2202 CU have not yet been read. */
2203 struct compunit_symtab
*compunit_symtab
;
2205 /* A temporary mark bit used when iterating over all CUs in
2206 expand_symtabs_matching. */
2207 unsigned int mark
: 1;
2209 /* True if we've tried to read the file table and found there isn't one.
2210 There will be no point in trying to read it again next time. */
2211 unsigned int no_file_data
: 1;
2214 /* Utility hash function for a stmt_list_hash. */
2217 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2221 if (stmt_list_hash
->dwo_unit
!= NULL
)
2222 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2223 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2227 /* Utility equality function for a stmt_list_hash. */
2230 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2231 const struct stmt_list_hash
*rhs
)
2233 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2235 if (lhs
->dwo_unit
!= NULL
2236 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2239 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2242 /* Hash function for a quick_file_names. */
2245 hash_file_name_entry (const void *e
)
2247 const struct quick_file_names
*file_data
2248 = (const struct quick_file_names
*) e
;
2250 return hash_stmt_list_entry (&file_data
->hash
);
2253 /* Equality function for a quick_file_names. */
2256 eq_file_name_entry (const void *a
, const void *b
)
2258 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2259 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2261 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2264 /* Delete function for a quick_file_names. */
2267 delete_file_name_entry (void *e
)
2269 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2272 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2274 xfree ((void*) file_data
->file_names
[i
]);
2275 if (file_data
->real_names
)
2276 xfree ((void*) file_data
->real_names
[i
]);
2279 /* The space for the struct itself lives on objfile_obstack,
2280 so we don't free it here. */
2283 /* Create a quick_file_names hash table. */
2286 create_quick_file_names_table (unsigned int nr_initial_entries
)
2288 return htab_up (htab_create_alloc (nr_initial_entries
,
2289 hash_file_name_entry
, eq_file_name_entry
,
2290 delete_file_name_entry
, xcalloc
, xfree
));
2293 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2294 have to be created afterwards. You should call age_cached_comp_units after
2295 processing PER_CU->CU. dw2_setup must have been already called. */
2298 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2300 if (per_cu
->is_debug_types
)
2301 load_full_type_unit (per_cu
);
2303 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2305 if (per_cu
->cu
== NULL
)
2306 return; /* Dummy CU. */
2308 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2311 /* Read in the symbols for PER_CU. */
2314 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2316 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2318 /* Skip type_unit_groups, reading the type units they contain
2319 is handled elsewhere. */
2320 if (per_cu
->type_unit_group_p ())
2323 /* The destructor of dwarf2_queue_guard frees any entries left on
2324 the queue. After this point we're guaranteed to leave this function
2325 with the dwarf queue empty. */
2326 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2328 if (dwarf2_per_objfile
->using_index
2329 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2330 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2332 queue_comp_unit (per_cu
, language_minimal
);
2333 load_cu (per_cu
, skip_partial
);
2335 /* If we just loaded a CU from a DWO, and we're working with an index
2336 that may badly handle TUs, load all the TUs in that DWO as well.
2337 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2338 if (!per_cu
->is_debug_types
2339 && per_cu
->cu
!= NULL
2340 && per_cu
->cu
->dwo_unit
!= NULL
2341 && dwarf2_per_objfile
->index_table
!= NULL
2342 && dwarf2_per_objfile
->index_table
->version
<= 7
2343 /* DWP files aren't supported yet. */
2344 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2345 queue_and_load_all_dwo_tus (per_cu
);
2348 process_queue (dwarf2_per_objfile
);
2350 /* Age the cache, releasing compilation units that have not
2351 been used recently. */
2352 age_cached_comp_units (dwarf2_per_objfile
);
2355 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2356 the objfile from which this CU came. Returns the resulting symbol
2359 static struct compunit_symtab
*
2360 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2362 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2364 gdb_assert (dwarf2_per_objfile
->using_index
);
2365 if (!per_cu
->v
.quick
->compunit_symtab
)
2367 free_cached_comp_units
freer (dwarf2_per_objfile
);
2368 scoped_restore decrementer
= increment_reading_symtab ();
2369 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2370 process_cu_includes (dwarf2_per_objfile
);
2373 return per_cu
->v
.quick
->compunit_symtab
;
2376 /* See declaration. */
2378 dwarf2_per_cu_data
*
2379 dwarf2_per_objfile::get_cutu (int index
)
2381 if (index
>= this->all_comp_units
.size ())
2383 index
-= this->all_comp_units
.size ();
2384 gdb_assert (index
< this->all_type_units
.size ());
2385 return &this->all_type_units
[index
]->per_cu
;
2388 return this->all_comp_units
[index
];
2391 /* See declaration. */
2393 dwarf2_per_cu_data
*
2394 dwarf2_per_objfile::get_cu (int index
)
2396 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2398 return this->all_comp_units
[index
];
2401 /* See declaration. */
2404 dwarf2_per_objfile::get_tu (int index
)
2406 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2408 return this->all_type_units
[index
];
2411 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2412 objfile_obstack, and constructed with the specified field
2415 static dwarf2_per_cu_data
*
2416 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2417 struct dwarf2_section_info
*section
,
2419 sect_offset sect_off
, ULONGEST length
)
2421 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2422 dwarf2_per_cu_data
*the_cu
2423 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2424 struct dwarf2_per_cu_data
);
2425 the_cu
->sect_off
= sect_off
;
2426 the_cu
->length
= length
;
2427 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2428 the_cu
->section
= section
;
2429 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2430 struct dwarf2_per_cu_quick_data
);
2431 the_cu
->is_dwz
= is_dwz
;
2435 /* A helper for create_cus_from_index that handles a given list of
2439 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2440 const gdb_byte
*cu_list
, offset_type n_elements
,
2441 struct dwarf2_section_info
*section
,
2444 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2446 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2448 sect_offset sect_off
2449 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2450 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2453 dwarf2_per_cu_data
*per_cu
2454 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2456 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2460 /* Read the CU list from the mapped index, and use it to create all
2461 the CU objects for this objfile. */
2464 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2465 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2466 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2468 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2469 dwarf2_per_objfile
->all_comp_units
.reserve
2470 ((cu_list_elements
+ dwz_elements
) / 2);
2472 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2473 &dwarf2_per_objfile
->info
, 0);
2475 if (dwz_elements
== 0)
2478 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2479 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2483 /* Create the signatured type hash table from the index. */
2486 create_signatured_type_table_from_index
2487 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2488 struct dwarf2_section_info
*section
,
2489 const gdb_byte
*bytes
,
2490 offset_type elements
)
2492 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2494 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2495 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2497 htab_up sig_types_hash
= allocate_signatured_type_table ();
2499 for (offset_type i
= 0; i
< elements
; i
+= 3)
2501 struct signatured_type
*sig_type
;
2504 cu_offset type_offset_in_tu
;
2506 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2507 sect_offset sect_off
2508 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2510 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2512 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2515 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2516 struct signatured_type
);
2517 sig_type
->signature
= signature
;
2518 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2519 sig_type
->per_cu
.is_debug_types
= 1;
2520 sig_type
->per_cu
.section
= section
;
2521 sig_type
->per_cu
.sect_off
= sect_off
;
2522 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2523 sig_type
->per_cu
.v
.quick
2524 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2525 struct dwarf2_per_cu_quick_data
);
2527 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2530 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2533 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2536 /* Create the signatured type hash table from .debug_names. */
2539 create_signatured_type_table_from_debug_names
2540 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2541 const mapped_debug_names
&map
,
2542 struct dwarf2_section_info
*section
,
2543 struct dwarf2_section_info
*abbrev_section
)
2545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2547 section
->read (objfile
);
2548 abbrev_section
->read (objfile
);
2550 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2551 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2553 htab_up sig_types_hash
= allocate_signatured_type_table ();
2555 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2557 struct signatured_type
*sig_type
;
2560 sect_offset sect_off
2561 = (sect_offset
) (extract_unsigned_integer
2562 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2564 map
.dwarf5_byte_order
));
2566 comp_unit_head cu_header
;
2567 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2569 section
->buffer
+ to_underlying (sect_off
),
2572 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2573 struct signatured_type
);
2574 sig_type
->signature
= cu_header
.signature
;
2575 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2576 sig_type
->per_cu
.is_debug_types
= 1;
2577 sig_type
->per_cu
.section
= section
;
2578 sig_type
->per_cu
.sect_off
= sect_off
;
2579 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2580 sig_type
->per_cu
.v
.quick
2581 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2582 struct dwarf2_per_cu_quick_data
);
2584 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2587 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2590 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2593 /* Read the address map data from the mapped index, and use it to
2594 populate the objfile's psymtabs_addrmap. */
2597 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2598 struct mapped_index
*index
)
2600 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2601 struct gdbarch
*gdbarch
= objfile
->arch ();
2602 const gdb_byte
*iter
, *end
;
2603 struct addrmap
*mutable_map
;
2606 auto_obstack temp_obstack
;
2608 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2610 iter
= index
->address_table
.data ();
2611 end
= iter
+ index
->address_table
.size ();
2613 baseaddr
= objfile
->text_section_offset ();
2617 ULONGEST hi
, lo
, cu_index
;
2618 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2620 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2622 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2627 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2628 hex_string (lo
), hex_string (hi
));
2632 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2634 complaint (_(".gdb_index address table has invalid CU number %u"),
2635 (unsigned) cu_index
);
2639 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2640 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2641 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2642 dwarf2_per_objfile
->get_cu (cu_index
));
2645 objfile
->partial_symtabs
->psymtabs_addrmap
2646 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2649 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2650 populate the objfile's psymtabs_addrmap. */
2653 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2654 struct dwarf2_section_info
*section
)
2656 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2657 bfd
*abfd
= objfile
->obfd
;
2658 struct gdbarch
*gdbarch
= objfile
->arch ();
2659 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2661 auto_obstack temp_obstack
;
2662 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2664 std::unordered_map
<sect_offset
,
2665 dwarf2_per_cu_data
*,
2666 gdb::hash_enum
<sect_offset
>>
2667 debug_info_offset_to_per_cu
;
2668 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2670 const auto insertpair
2671 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2672 if (!insertpair
.second
)
2674 warning (_("Section .debug_aranges in %s has duplicate "
2675 "debug_info_offset %s, ignoring .debug_aranges."),
2676 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2681 section
->read (objfile
);
2683 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2685 const gdb_byte
*addr
= section
->buffer
;
2687 while (addr
< section
->buffer
+ section
->size
)
2689 const gdb_byte
*const entry_addr
= addr
;
2690 unsigned int bytes_read
;
2692 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2696 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2697 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2698 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2699 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2701 warning (_("Section .debug_aranges in %s entry at offset %s "
2702 "length %s exceeds section length %s, "
2703 "ignoring .debug_aranges."),
2704 objfile_name (objfile
),
2705 plongest (entry_addr
- section
->buffer
),
2706 plongest (bytes_read
+ entry_length
),
2707 pulongest (section
->size
));
2711 /* The version number. */
2712 const uint16_t version
= read_2_bytes (abfd
, addr
);
2716 warning (_("Section .debug_aranges in %s entry at offset %s "
2717 "has unsupported version %d, ignoring .debug_aranges."),
2718 objfile_name (objfile
),
2719 plongest (entry_addr
- section
->buffer
), version
);
2723 const uint64_t debug_info_offset
2724 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2725 addr
+= offset_size
;
2726 const auto per_cu_it
2727 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2728 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2730 warning (_("Section .debug_aranges in %s entry at offset %s "
2731 "debug_info_offset %s does not exists, "
2732 "ignoring .debug_aranges."),
2733 objfile_name (objfile
),
2734 plongest (entry_addr
- section
->buffer
),
2735 pulongest (debug_info_offset
));
2738 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2740 const uint8_t address_size
= *addr
++;
2741 if (address_size
< 1 || address_size
> 8)
2743 warning (_("Section .debug_aranges in %s entry at offset %s "
2744 "address_size %u is invalid, ignoring .debug_aranges."),
2745 objfile_name (objfile
),
2746 plongest (entry_addr
- section
->buffer
), address_size
);
2750 const uint8_t segment_selector_size
= *addr
++;
2751 if (segment_selector_size
!= 0)
2753 warning (_("Section .debug_aranges in %s entry at offset %s "
2754 "segment_selector_size %u is not supported, "
2755 "ignoring .debug_aranges."),
2756 objfile_name (objfile
),
2757 plongest (entry_addr
- section
->buffer
),
2758 segment_selector_size
);
2762 /* Must pad to an alignment boundary that is twice the address
2763 size. It is undocumented by the DWARF standard but GCC does
2765 for (size_t padding
= ((-(addr
- section
->buffer
))
2766 & (2 * address_size
- 1));
2767 padding
> 0; padding
--)
2770 warning (_("Section .debug_aranges in %s entry at offset %s "
2771 "padding is not zero, ignoring .debug_aranges."),
2772 objfile_name (objfile
),
2773 plongest (entry_addr
- section
->buffer
));
2779 if (addr
+ 2 * address_size
> entry_end
)
2781 warning (_("Section .debug_aranges in %s entry at offset %s "
2782 "address list is not properly terminated, "
2783 "ignoring .debug_aranges."),
2784 objfile_name (objfile
),
2785 plongest (entry_addr
- section
->buffer
));
2788 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2790 addr
+= address_size
;
2791 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2793 addr
+= address_size
;
2794 if (start
== 0 && length
== 0)
2796 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
2798 /* Symbol was eliminated due to a COMDAT group. */
2801 ULONGEST end
= start
+ length
;
2802 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2804 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2806 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2810 objfile
->partial_symtabs
->psymtabs_addrmap
2811 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2814 /* Find a slot in the mapped index INDEX for the object named NAME.
2815 If NAME is found, set *VEC_OUT to point to the CU vector in the
2816 constant pool and return true. If NAME cannot be found, return
2820 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2821 offset_type
**vec_out
)
2824 offset_type slot
, step
;
2825 int (*cmp
) (const char *, const char *);
2827 gdb::unique_xmalloc_ptr
<char> without_params
;
2828 if (current_language
->la_language
== language_cplus
2829 || current_language
->la_language
== language_fortran
2830 || current_language
->la_language
== language_d
)
2832 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2835 if (strchr (name
, '(') != NULL
)
2837 without_params
= cp_remove_params (name
);
2839 if (without_params
!= NULL
)
2840 name
= without_params
.get ();
2844 /* Index version 4 did not support case insensitive searches. But the
2845 indices for case insensitive languages are built in lowercase, therefore
2846 simulate our NAME being searched is also lowercased. */
2847 hash
= mapped_index_string_hash ((index
->version
== 4
2848 && case_sensitivity
== case_sensitive_off
2849 ? 5 : index
->version
),
2852 slot
= hash
& (index
->symbol_table
.size () - 1);
2853 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2854 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2860 const auto &bucket
= index
->symbol_table
[slot
];
2861 if (bucket
.name
== 0 && bucket
.vec
== 0)
2864 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2865 if (!cmp (name
, str
))
2867 *vec_out
= (offset_type
*) (index
->constant_pool
2868 + MAYBE_SWAP (bucket
.vec
));
2872 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2876 /* A helper function that reads the .gdb_index from BUFFER and fills
2877 in MAP. FILENAME is the name of the file containing the data;
2878 it is used for error reporting. DEPRECATED_OK is true if it is
2879 ok to use deprecated sections.
2881 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2882 out parameters that are filled in with information about the CU and
2883 TU lists in the section.
2885 Returns true if all went well, false otherwise. */
2888 read_gdb_index_from_buffer (const char *filename
,
2890 gdb::array_view
<const gdb_byte
> buffer
,
2891 struct mapped_index
*map
,
2892 const gdb_byte
**cu_list
,
2893 offset_type
*cu_list_elements
,
2894 const gdb_byte
**types_list
,
2895 offset_type
*types_list_elements
)
2897 const gdb_byte
*addr
= &buffer
[0];
2899 /* Version check. */
2900 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2901 /* Versions earlier than 3 emitted every copy of a psymbol. This
2902 causes the index to behave very poorly for certain requests. Version 3
2903 contained incomplete addrmap. So, it seems better to just ignore such
2907 static int warning_printed
= 0;
2908 if (!warning_printed
)
2910 warning (_("Skipping obsolete .gdb_index section in %s."),
2912 warning_printed
= 1;
2916 /* Index version 4 uses a different hash function than index version
2919 Versions earlier than 6 did not emit psymbols for inlined
2920 functions. Using these files will cause GDB not to be able to
2921 set breakpoints on inlined functions by name, so we ignore these
2922 indices unless the user has done
2923 "set use-deprecated-index-sections on". */
2924 if (version
< 6 && !deprecated_ok
)
2926 static int warning_printed
= 0;
2927 if (!warning_printed
)
2930 Skipping deprecated .gdb_index section in %s.\n\
2931 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2932 to use the section anyway."),
2934 warning_printed
= 1;
2938 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2939 of the TU (for symbols coming from TUs),
2940 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2941 Plus gold-generated indices can have duplicate entries for global symbols,
2942 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2943 These are just performance bugs, and we can't distinguish gdb-generated
2944 indices from gold-generated ones, so issue no warning here. */
2946 /* Indexes with higher version than the one supported by GDB may be no
2947 longer backward compatible. */
2951 map
->version
= version
;
2953 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2956 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2957 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2961 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2962 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2963 - MAYBE_SWAP (metadata
[i
]))
2967 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2968 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2970 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2973 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2974 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2976 = gdb::array_view
<mapped_index::symbol_table_slot
>
2977 ((mapped_index::symbol_table_slot
*) symbol_table
,
2978 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2981 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2986 /* Callback types for dwarf2_read_gdb_index. */
2988 typedef gdb::function_view
2989 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
2990 get_gdb_index_contents_ftype
;
2991 typedef gdb::function_view
2992 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
2993 get_gdb_index_contents_dwz_ftype
;
2995 /* Read .gdb_index. If everything went ok, initialize the "quick"
2996 elements of all the CUs and return 1. Otherwise, return 0. */
2999 dwarf2_read_gdb_index
3000 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3001 get_gdb_index_contents_ftype get_gdb_index_contents
,
3002 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3004 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3005 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3006 struct dwz_file
*dwz
;
3007 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3009 gdb::array_view
<const gdb_byte
> main_index_contents
3010 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3012 if (main_index_contents
.empty ())
3015 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3016 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3017 use_deprecated_index_sections
,
3018 main_index_contents
, map
.get (), &cu_list
,
3019 &cu_list_elements
, &types_list
,
3020 &types_list_elements
))
3023 /* Don't use the index if it's empty. */
3024 if (map
->symbol_table
.empty ())
3027 /* If there is a .dwz file, read it so we can get its CU list as
3029 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3032 struct mapped_index dwz_map
;
3033 const gdb_byte
*dwz_types_ignore
;
3034 offset_type dwz_types_elements_ignore
;
3036 gdb::array_view
<const gdb_byte
> dwz_index_content
3037 = get_gdb_index_contents_dwz (objfile
, dwz
);
3039 if (dwz_index_content
.empty ())
3042 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3043 1, dwz_index_content
, &dwz_map
,
3044 &dwz_list
, &dwz_list_elements
,
3046 &dwz_types_elements_ignore
))
3048 warning (_("could not read '.gdb_index' section from %s; skipping"),
3049 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3054 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3055 dwz_list
, dwz_list_elements
);
3057 if (types_list_elements
)
3059 /* We can only handle a single .debug_types when we have an
3061 if (dwarf2_per_objfile
->types
.size () != 1)
3064 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3066 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3067 types_list
, types_list_elements
);
3070 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3072 dwarf2_per_objfile
->index_table
= std::move (map
);
3073 dwarf2_per_objfile
->using_index
= 1;
3074 dwarf2_per_objfile
->quick_file_names_table
=
3075 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3080 /* die_reader_func for dw2_get_file_names. */
3083 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3084 const gdb_byte
*info_ptr
,
3085 struct die_info
*comp_unit_die
)
3087 struct dwarf2_cu
*cu
= reader
->cu
;
3088 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3089 struct dwarf2_per_objfile
*dwarf2_per_objfile
3090 = cu
->per_cu
->dwarf2_per_objfile
;
3091 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3092 struct dwarf2_per_cu_data
*lh_cu
;
3093 struct attribute
*attr
;
3095 struct quick_file_names
*qfn
;
3097 gdb_assert (! this_cu
->is_debug_types
);
3099 /* Our callers never want to match partial units -- instead they
3100 will match the enclosing full CU. */
3101 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3103 this_cu
->v
.quick
->no_file_data
= 1;
3111 sect_offset line_offset
{};
3113 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3114 if (attr
!= nullptr)
3116 struct quick_file_names find_entry
;
3118 line_offset
= (sect_offset
) DW_UNSND (attr
);
3120 /* We may have already read in this line header (TU line header sharing).
3121 If we have we're done. */
3122 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3123 find_entry
.hash
.line_sect_off
= line_offset
;
3124 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
.get (),
3125 &find_entry
, INSERT
);
3128 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3132 lh
= dwarf_decode_line_header (line_offset
, cu
);
3136 lh_cu
->v
.quick
->no_file_data
= 1;
3140 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3141 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3142 qfn
->hash
.line_sect_off
= line_offset
;
3143 gdb_assert (slot
!= NULL
);
3146 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3149 if (strcmp (fnd
.name
, "<unknown>") != 0)
3152 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3154 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3156 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3157 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3158 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3159 fnd
.comp_dir
).release ();
3160 qfn
->real_names
= NULL
;
3162 lh_cu
->v
.quick
->file_names
= qfn
;
3165 /* A helper for the "quick" functions which attempts to read the line
3166 table for THIS_CU. */
3168 static struct quick_file_names
*
3169 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3171 /* This should never be called for TUs. */
3172 gdb_assert (! this_cu
->is_debug_types
);
3173 /* Nor type unit groups. */
3174 gdb_assert (! this_cu
->type_unit_group_p ());
3176 if (this_cu
->v
.quick
->file_names
!= NULL
)
3177 return this_cu
->v
.quick
->file_names
;
3178 /* If we know there is no line data, no point in looking again. */
3179 if (this_cu
->v
.quick
->no_file_data
)
3182 cutu_reader
reader (this_cu
);
3183 if (!reader
.dummy_p
)
3184 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3186 if (this_cu
->v
.quick
->no_file_data
)
3188 return this_cu
->v
.quick
->file_names
;
3191 /* A helper for the "quick" functions which computes and caches the
3192 real path for a given file name from the line table. */
3195 dw2_get_real_path (struct objfile
*objfile
,
3196 struct quick_file_names
*qfn
, int index
)
3198 if (qfn
->real_names
== NULL
)
3199 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3200 qfn
->num_file_names
, const char *);
3202 if (qfn
->real_names
[index
] == NULL
)
3203 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3205 return qfn
->real_names
[index
];
3208 static struct symtab
*
3209 dw2_find_last_source_symtab (struct objfile
*objfile
)
3211 struct dwarf2_per_objfile
*dwarf2_per_objfile
3212 = get_dwarf2_per_objfile (objfile
);
3213 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3214 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3219 return compunit_primary_filetab (cust
);
3222 /* Traversal function for dw2_forget_cached_source_info. */
3225 dw2_free_cached_file_names (void **slot
, void *info
)
3227 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3229 if (file_data
->real_names
)
3233 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3235 xfree ((void*) file_data
->real_names
[i
]);
3236 file_data
->real_names
[i
] = NULL
;
3244 dw2_forget_cached_source_info (struct objfile
*objfile
)
3246 struct dwarf2_per_objfile
*dwarf2_per_objfile
3247 = get_dwarf2_per_objfile (objfile
);
3249 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
.get (),
3250 dw2_free_cached_file_names
, NULL
);
3253 /* Helper function for dw2_map_symtabs_matching_filename that expands
3254 the symtabs and calls the iterator. */
3257 dw2_map_expand_apply (struct objfile
*objfile
,
3258 struct dwarf2_per_cu_data
*per_cu
,
3259 const char *name
, const char *real_path
,
3260 gdb::function_view
<bool (symtab
*)> callback
)
3262 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3264 /* Don't visit already-expanded CUs. */
3265 if (per_cu
->v
.quick
->compunit_symtab
)
3268 /* This may expand more than one symtab, and we want to iterate over
3270 dw2_instantiate_symtab (per_cu
, false);
3272 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3273 last_made
, callback
);
3276 /* Implementation of the map_symtabs_matching_filename method. */
3279 dw2_map_symtabs_matching_filename
3280 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3281 gdb::function_view
<bool (symtab
*)> callback
)
3283 const char *name_basename
= lbasename (name
);
3284 struct dwarf2_per_objfile
*dwarf2_per_objfile
3285 = get_dwarf2_per_objfile (objfile
);
3287 /* The rule is CUs specify all the files, including those used by
3288 any TU, so there's no need to scan TUs here. */
3290 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3292 /* We only need to look at symtabs not already expanded. */
3293 if (per_cu
->v
.quick
->compunit_symtab
)
3296 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3297 if (file_data
== NULL
)
3300 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3302 const char *this_name
= file_data
->file_names
[j
];
3303 const char *this_real_name
;
3305 if (compare_filenames_for_search (this_name
, name
))
3307 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3313 /* Before we invoke realpath, which can get expensive when many
3314 files are involved, do a quick comparison of the basenames. */
3315 if (! basenames_may_differ
3316 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3319 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3320 if (compare_filenames_for_search (this_real_name
, name
))
3322 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3328 if (real_path
!= NULL
)
3330 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3331 gdb_assert (IS_ABSOLUTE_PATH (name
));
3332 if (this_real_name
!= NULL
3333 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3335 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3347 /* Struct used to manage iterating over all CUs looking for a symbol. */
3349 struct dw2_symtab_iterator
3351 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3352 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3353 /* If set, only look for symbols that match that block. Valid values are
3354 GLOBAL_BLOCK and STATIC_BLOCK. */
3355 gdb::optional
<block_enum
> block_index
;
3356 /* The kind of symbol we're looking for. */
3358 /* The list of CUs from the index entry of the symbol,
3359 or NULL if not found. */
3361 /* The next element in VEC to look at. */
3363 /* The number of elements in VEC, or zero if there is no match. */
3365 /* Have we seen a global version of the symbol?
3366 If so we can ignore all further global instances.
3367 This is to work around gold/15646, inefficient gold-generated
3372 /* Initialize the index symtab iterator ITER. */
3375 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3376 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3377 gdb::optional
<block_enum
> block_index
,
3381 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3382 iter
->block_index
= block_index
;
3383 iter
->domain
= domain
;
3385 iter
->global_seen
= 0;
3387 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3389 /* index is NULL if OBJF_READNOW. */
3390 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3391 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3399 /* Return the next matching CU or NULL if there are no more. */
3401 static struct dwarf2_per_cu_data
*
3402 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3404 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3406 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3408 offset_type cu_index_and_attrs
=
3409 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3410 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3411 gdb_index_symbol_kind symbol_kind
=
3412 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3413 /* Only check the symbol attributes if they're present.
3414 Indices prior to version 7 don't record them,
3415 and indices >= 7 may elide them for certain symbols
3416 (gold does this). */
3418 (dwarf2_per_objfile
->index_table
->version
>= 7
3419 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3421 /* Don't crash on bad data. */
3422 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3423 + dwarf2_per_objfile
->all_type_units
.size ()))
3425 complaint (_(".gdb_index entry has bad CU index"
3427 objfile_name (dwarf2_per_objfile
->objfile
));
3431 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3433 /* Skip if already read in. */
3434 if (per_cu
->v
.quick
->compunit_symtab
)
3437 /* Check static vs global. */
3440 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3442 if (iter
->block_index
.has_value ())
3444 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3446 if (is_static
!= want_static
)
3450 /* Work around gold/15646. */
3451 if (!is_static
&& iter
->global_seen
)
3454 iter
->global_seen
= 1;
3457 /* Only check the symbol's kind if it has one. */
3460 switch (iter
->domain
)
3463 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3464 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3465 /* Some types are also in VAR_DOMAIN. */
3466 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3470 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3474 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3478 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3493 static struct compunit_symtab
*
3494 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3495 const char *name
, domain_enum domain
)
3497 struct compunit_symtab
*stab_best
= NULL
;
3498 struct dwarf2_per_objfile
*dwarf2_per_objfile
3499 = get_dwarf2_per_objfile (objfile
);
3501 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3503 struct dw2_symtab_iterator iter
;
3504 struct dwarf2_per_cu_data
*per_cu
;
3506 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3508 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3510 struct symbol
*sym
, *with_opaque
= NULL
;
3511 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3512 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3513 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3515 sym
= block_find_symbol (block
, name
, domain
,
3516 block_find_non_opaque_type_preferred
,
3519 /* Some caution must be observed with overloaded functions
3520 and methods, since the index will not contain any overload
3521 information (but NAME might contain it). */
3524 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3526 if (with_opaque
!= NULL
3527 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3530 /* Keep looking through other CUs. */
3537 dw2_print_stats (struct objfile
*objfile
)
3539 struct dwarf2_per_objfile
*dwarf2_per_objfile
3540 = get_dwarf2_per_objfile (objfile
);
3541 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3542 + dwarf2_per_objfile
->all_type_units
.size ());
3545 for (int i
= 0; i
< total
; ++i
)
3547 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3549 if (!per_cu
->v
.quick
->compunit_symtab
)
3552 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3553 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3556 /* This dumps minimal information about the index.
3557 It is called via "mt print objfiles".
3558 One use is to verify .gdb_index has been loaded by the
3559 gdb.dwarf2/gdb-index.exp testcase. */
3562 dw2_dump (struct objfile
*objfile
)
3564 struct dwarf2_per_objfile
*dwarf2_per_objfile
3565 = get_dwarf2_per_objfile (objfile
);
3567 gdb_assert (dwarf2_per_objfile
->using_index
);
3568 printf_filtered (".gdb_index:");
3569 if (dwarf2_per_objfile
->index_table
!= NULL
)
3571 printf_filtered (" version %d\n",
3572 dwarf2_per_objfile
->index_table
->version
);
3575 printf_filtered (" faked for \"readnow\"\n");
3576 printf_filtered ("\n");
3580 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3581 const char *func_name
)
3583 struct dwarf2_per_objfile
*dwarf2_per_objfile
3584 = get_dwarf2_per_objfile (objfile
);
3586 struct dw2_symtab_iterator iter
;
3587 struct dwarf2_per_cu_data
*per_cu
;
3589 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3591 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3592 dw2_instantiate_symtab (per_cu
, false);
3597 dw2_expand_all_symtabs (struct objfile
*objfile
)
3599 struct dwarf2_per_objfile
*dwarf2_per_objfile
3600 = get_dwarf2_per_objfile (objfile
);
3601 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3602 + dwarf2_per_objfile
->all_type_units
.size ());
3604 for (int i
= 0; i
< total_units
; ++i
)
3606 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3608 /* We don't want to directly expand a partial CU, because if we
3609 read it with the wrong language, then assertion failures can
3610 be triggered later on. See PR symtab/23010. So, tell
3611 dw2_instantiate_symtab to skip partial CUs -- any important
3612 partial CU will be read via DW_TAG_imported_unit anyway. */
3613 dw2_instantiate_symtab (per_cu
, true);
3618 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3619 const char *fullname
)
3621 struct dwarf2_per_objfile
*dwarf2_per_objfile
3622 = get_dwarf2_per_objfile (objfile
);
3624 /* We don't need to consider type units here.
3625 This is only called for examining code, e.g. expand_line_sal.
3626 There can be an order of magnitude (or more) more type units
3627 than comp units, and we avoid them if we can. */
3629 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3631 /* We only need to look at symtabs not already expanded. */
3632 if (per_cu
->v
.quick
->compunit_symtab
)
3635 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3636 if (file_data
== NULL
)
3639 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3641 const char *this_fullname
= file_data
->file_names
[j
];
3643 if (filename_cmp (this_fullname
, fullname
) == 0)
3645 dw2_instantiate_symtab (per_cu
, false);
3653 dw2_map_matching_symbols
3654 (struct objfile
*objfile
,
3655 const lookup_name_info
&name
, domain_enum domain
,
3657 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3658 symbol_compare_ftype
*ordered_compare
)
3661 struct dwarf2_per_objfile
*dwarf2_per_objfile
3662 = get_dwarf2_per_objfile (objfile
);
3664 if (dwarf2_per_objfile
->index_table
!= nullptr)
3666 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3667 here though if the current language is Ada for a non-Ada objfile
3668 using GNU index. As Ada does not look for non-Ada symbols this
3669 function should just return. */
3673 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3674 inline psym_map_matching_symbols here, assuming all partial symtabs have
3676 const int block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3678 for (compunit_symtab
*cust
: objfile
->compunits ())
3680 const struct block
*block
;
3684 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3685 if (!iterate_over_symbols_terminated (block
, name
,
3691 /* Starting from a search name, return the string that finds the upper
3692 bound of all strings that start with SEARCH_NAME in a sorted name
3693 list. Returns the empty string to indicate that the upper bound is
3694 the end of the list. */
3697 make_sort_after_prefix_name (const char *search_name
)
3699 /* When looking to complete "func", we find the upper bound of all
3700 symbols that start with "func" by looking for where we'd insert
3701 the closest string that would follow "func" in lexicographical
3702 order. Usually, that's "func"-with-last-character-incremented,
3703 i.e. "fund". Mind non-ASCII characters, though. Usually those
3704 will be UTF-8 multi-byte sequences, but we can't be certain.
3705 Especially mind the 0xff character, which is a valid character in
3706 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3707 rule out compilers allowing it in identifiers. Note that
3708 conveniently, strcmp/strcasecmp are specified to compare
3709 characters interpreted as unsigned char. So what we do is treat
3710 the whole string as a base 256 number composed of a sequence of
3711 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3712 to 0, and carries 1 to the following more-significant position.
3713 If the very first character in SEARCH_NAME ends up incremented
3714 and carries/overflows, then the upper bound is the end of the
3715 list. The string after the empty string is also the empty
3718 Some examples of this operation:
3720 SEARCH_NAME => "+1" RESULT
3724 "\xff" "a" "\xff" => "\xff" "b"
3729 Then, with these symbols for example:
3735 completing "func" looks for symbols between "func" and
3736 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3737 which finds "func" and "func1", but not "fund".
3741 funcÿ (Latin1 'ÿ' [0xff])
3745 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3746 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3750 ÿÿ (Latin1 'ÿ' [0xff])
3753 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3754 the end of the list.
3756 std::string after
= search_name
;
3757 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3759 if (!after
.empty ())
3760 after
.back () = (unsigned char) after
.back () + 1;
3764 /* See declaration. */
3766 std::pair
<std::vector
<name_component
>::const_iterator
,
3767 std::vector
<name_component
>::const_iterator
>
3768 mapped_index_base::find_name_components_bounds
3769 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3772 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3774 const char *lang_name
3775 = lookup_name_without_params
.language_lookup_name (lang
);
3777 /* Comparison function object for lower_bound that matches against a
3778 given symbol name. */
3779 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3782 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3783 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3784 return name_cmp (elem_name
, name
) < 0;
3787 /* Comparison function object for upper_bound that matches against a
3788 given symbol name. */
3789 auto lookup_compare_upper
= [&] (const char *name
,
3790 const name_component
&elem
)
3792 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3793 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3794 return name_cmp (name
, elem_name
) < 0;
3797 auto begin
= this->name_components
.begin ();
3798 auto end
= this->name_components
.end ();
3800 /* Find the lower bound. */
3803 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3806 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3809 /* Find the upper bound. */
3812 if (lookup_name_without_params
.completion_mode ())
3814 /* In completion mode, we want UPPER to point past all
3815 symbols names that have the same prefix. I.e., with
3816 these symbols, and completing "func":
3818 function << lower bound
3820 other_function << upper bound
3822 We find the upper bound by looking for the insertion
3823 point of "func"-with-last-character-incremented,
3825 std::string after
= make_sort_after_prefix_name (lang_name
);
3828 return std::lower_bound (lower
, end
, after
.c_str (),
3829 lookup_compare_lower
);
3832 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3835 return {lower
, upper
};
3838 /* See declaration. */
3841 mapped_index_base::build_name_components ()
3843 if (!this->name_components
.empty ())
3846 this->name_components_casing
= case_sensitivity
;
3848 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3850 /* The code below only knows how to break apart components of C++
3851 symbol names (and other languages that use '::' as
3852 namespace/module separator) and Ada symbol names. */
3853 auto count
= this->symbol_name_count ();
3854 for (offset_type idx
= 0; idx
< count
; idx
++)
3856 if (this->symbol_name_slot_invalid (idx
))
3859 const char *name
= this->symbol_name_at (idx
);
3861 /* Add each name component to the name component table. */
3862 unsigned int previous_len
= 0;
3864 if (strstr (name
, "::") != nullptr)
3866 for (unsigned int current_len
= cp_find_first_component (name
);
3867 name
[current_len
] != '\0';
3868 current_len
+= cp_find_first_component (name
+ current_len
))
3870 gdb_assert (name
[current_len
] == ':');
3871 this->name_components
.push_back ({previous_len
, idx
});
3872 /* Skip the '::'. */
3874 previous_len
= current_len
;
3879 /* Handle the Ada encoded (aka mangled) form here. */
3880 for (const char *iter
= strstr (name
, "__");
3882 iter
= strstr (iter
, "__"))
3884 this->name_components
.push_back ({previous_len
, idx
});
3886 previous_len
= iter
- name
;
3890 this->name_components
.push_back ({previous_len
, idx
});
3893 /* Sort name_components elements by name. */
3894 auto name_comp_compare
= [&] (const name_component
&left
,
3895 const name_component
&right
)
3897 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3898 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3900 const char *left_name
= left_qualified
+ left
.name_offset
;
3901 const char *right_name
= right_qualified
+ right
.name_offset
;
3903 return name_cmp (left_name
, right_name
) < 0;
3906 std::sort (this->name_components
.begin (),
3907 this->name_components
.end (),
3911 /* Helper for dw2_expand_symtabs_matching that works with a
3912 mapped_index_base instead of the containing objfile. This is split
3913 to a separate function in order to be able to unit test the
3914 name_components matching using a mock mapped_index_base. For each
3915 symbol name that matches, calls MATCH_CALLBACK, passing it the
3916 symbol's index in the mapped_index_base symbol table. */
3919 dw2_expand_symtabs_matching_symbol
3920 (mapped_index_base
&index
,
3921 const lookup_name_info
&lookup_name_in
,
3922 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3923 enum search_domain kind
,
3924 gdb::function_view
<bool (offset_type
)> match_callback
)
3926 lookup_name_info lookup_name_without_params
3927 = lookup_name_in
.make_ignore_params ();
3929 /* Build the symbol name component sorted vector, if we haven't
3931 index
.build_name_components ();
3933 /* The same symbol may appear more than once in the range though.
3934 E.g., if we're looking for symbols that complete "w", and we have
3935 a symbol named "w1::w2", we'll find the two name components for
3936 that same symbol in the range. To be sure we only call the
3937 callback once per symbol, we first collect the symbol name
3938 indexes that matched in a temporary vector and ignore
3940 std::vector
<offset_type
> matches
;
3942 struct name_and_matcher
3944 symbol_name_matcher_ftype
*matcher
;
3947 bool operator== (const name_and_matcher
&other
) const
3949 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
3953 /* A vector holding all the different symbol name matchers, for all
3955 std::vector
<name_and_matcher
> matchers
;
3957 for (int i
= 0; i
< nr_languages
; i
++)
3959 enum language lang_e
= (enum language
) i
;
3961 const language_defn
*lang
= language_def (lang_e
);
3962 symbol_name_matcher_ftype
*name_matcher
3963 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
3965 name_and_matcher key
{
3967 lookup_name_without_params
.language_lookup_name (lang_e
)
3970 /* Don't insert the same comparison routine more than once.
3971 Note that we do this linear walk. This is not a problem in
3972 practice because the number of supported languages is
3974 if (std::find (matchers
.begin (), matchers
.end (), key
)
3977 matchers
.push_back (std::move (key
));
3980 = index
.find_name_components_bounds (lookup_name_without_params
,
3983 /* Now for each symbol name in range, check to see if we have a name
3984 match, and if so, call the MATCH_CALLBACK callback. */
3986 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
3988 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
3990 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
3991 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
3994 matches
.push_back (bounds
.first
->idx
);
3998 std::sort (matches
.begin (), matches
.end ());
4000 /* Finally call the callback, once per match. */
4002 for (offset_type idx
: matches
)
4006 if (!match_callback (idx
))
4012 /* Above we use a type wider than idx's for 'prev', since 0 and
4013 (offset_type)-1 are both possible values. */
4014 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4019 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4021 /* A mock .gdb_index/.debug_names-like name index table, enough to
4022 exercise dw2_expand_symtabs_matching_symbol, which works with the
4023 mapped_index_base interface. Builds an index from the symbol list
4024 passed as parameter to the constructor. */
4025 class mock_mapped_index
: public mapped_index_base
4028 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4029 : m_symbol_table (symbols
)
4032 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4034 /* Return the number of names in the symbol table. */
4035 size_t symbol_name_count () const override
4037 return m_symbol_table
.size ();
4040 /* Get the name of the symbol at IDX in the symbol table. */
4041 const char *symbol_name_at (offset_type idx
) const override
4043 return m_symbol_table
[idx
];
4047 gdb::array_view
<const char *> m_symbol_table
;
4050 /* Convenience function that converts a NULL pointer to a "<null>"
4051 string, to pass to print routines. */
4054 string_or_null (const char *str
)
4056 return str
!= NULL
? str
: "<null>";
4059 /* Check if a lookup_name_info built from
4060 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4061 index. EXPECTED_LIST is the list of expected matches, in expected
4062 matching order. If no match expected, then an empty list is
4063 specified. Returns true on success. On failure prints a warning
4064 indicating the file:line that failed, and returns false. */
4067 check_match (const char *file
, int line
,
4068 mock_mapped_index
&mock_index
,
4069 const char *name
, symbol_name_match_type match_type
,
4070 bool completion_mode
,
4071 std::initializer_list
<const char *> expected_list
)
4073 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4075 bool matched
= true;
4077 auto mismatch
= [&] (const char *expected_str
,
4080 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4081 "expected=\"%s\", got=\"%s\"\n"),
4083 (match_type
== symbol_name_match_type::FULL
4085 name
, string_or_null (expected_str
), string_or_null (got
));
4089 auto expected_it
= expected_list
.begin ();
4090 auto expected_end
= expected_list
.end ();
4092 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4094 [&] (offset_type idx
)
4096 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4097 const char *expected_str
4098 = expected_it
== expected_end
? NULL
: *expected_it
++;
4100 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4101 mismatch (expected_str
, matched_name
);
4105 const char *expected_str
4106 = expected_it
== expected_end
? NULL
: *expected_it
++;
4107 if (expected_str
!= NULL
)
4108 mismatch (expected_str
, NULL
);
4113 /* The symbols added to the mock mapped_index for testing (in
4115 static const char *test_symbols
[] = {
4124 "ns2::tmpl<int>::foo2",
4125 "(anonymous namespace)::A::B::C",
4127 /* These are used to check that the increment-last-char in the
4128 matching algorithm for completion doesn't match "t1_fund" when
4129 completing "t1_func". */
4135 /* A UTF-8 name with multi-byte sequences to make sure that
4136 cp-name-parser understands this as a single identifier ("função"
4137 is "function" in PT). */
4140 /* \377 (0xff) is Latin1 'ÿ'. */
4143 /* \377 (0xff) is Latin1 'ÿ'. */
4147 /* A name with all sorts of complications. Starts with "z" to make
4148 it easier for the completion tests below. */
4149 #define Z_SYM_NAME \
4150 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4151 "::tuple<(anonymous namespace)::ui*, " \
4152 "std::default_delete<(anonymous namespace)::ui>, void>"
4157 /* Returns true if the mapped_index_base::find_name_component_bounds
4158 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4159 in completion mode. */
4162 check_find_bounds_finds (mapped_index_base
&index
,
4163 const char *search_name
,
4164 gdb::array_view
<const char *> expected_syms
)
4166 lookup_name_info
lookup_name (search_name
,
4167 symbol_name_match_type::FULL
, true);
4169 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4172 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4173 if (distance
!= expected_syms
.size ())
4176 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4178 auto nc_elem
= bounds
.first
+ exp_elem
;
4179 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4180 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4187 /* Test the lower-level mapped_index::find_name_component_bounds
4191 test_mapped_index_find_name_component_bounds ()
4193 mock_mapped_index
mock_index (test_symbols
);
4195 mock_index
.build_name_components ();
4197 /* Test the lower-level mapped_index::find_name_component_bounds
4198 method in completion mode. */
4200 static const char *expected_syms
[] = {
4205 SELF_CHECK (check_find_bounds_finds (mock_index
,
4206 "t1_func", expected_syms
));
4209 /* Check that the increment-last-char in the name matching algorithm
4210 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4212 static const char *expected_syms1
[] = {
4216 SELF_CHECK (check_find_bounds_finds (mock_index
,
4217 "\377", expected_syms1
));
4219 static const char *expected_syms2
[] = {
4222 SELF_CHECK (check_find_bounds_finds (mock_index
,
4223 "\377\377", expected_syms2
));
4227 /* Test dw2_expand_symtabs_matching_symbol. */
4230 test_dw2_expand_symtabs_matching_symbol ()
4232 mock_mapped_index
mock_index (test_symbols
);
4234 /* We let all tests run until the end even if some fails, for debug
4236 bool any_mismatch
= false;
4238 /* Create the expected symbols list (an initializer_list). Needed
4239 because lists have commas, and we need to pass them to CHECK,
4240 which is a macro. */
4241 #define EXPECT(...) { __VA_ARGS__ }
4243 /* Wrapper for check_match that passes down the current
4244 __FILE__/__LINE__. */
4245 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4246 any_mismatch |= !check_match (__FILE__, __LINE__, \
4248 NAME, MATCH_TYPE, COMPLETION_MODE, \
4251 /* Identity checks. */
4252 for (const char *sym
: test_symbols
)
4254 /* Should be able to match all existing symbols. */
4255 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4258 /* Should be able to match all existing symbols with
4260 std::string with_params
= std::string (sym
) + "(int)";
4261 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4264 /* Should be able to match all existing symbols with
4265 parameters and qualifiers. */
4266 with_params
= std::string (sym
) + " ( int ) const";
4267 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4270 /* This should really find sym, but cp-name-parser.y doesn't
4271 know about lvalue/rvalue qualifiers yet. */
4272 with_params
= std::string (sym
) + " ( int ) &&";
4273 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4277 /* Check that the name matching algorithm for completion doesn't get
4278 confused with Latin1 'ÿ' / 0xff. */
4280 static const char str
[] = "\377";
4281 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4282 EXPECT ("\377", "\377\377123"));
4285 /* Check that the increment-last-char in the matching algorithm for
4286 completion doesn't match "t1_fund" when completing "t1_func". */
4288 static const char str
[] = "t1_func";
4289 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4290 EXPECT ("t1_func", "t1_func1"));
4293 /* Check that completion mode works at each prefix of the expected
4296 static const char str
[] = "function(int)";
4297 size_t len
= strlen (str
);
4300 for (size_t i
= 1; i
< len
; i
++)
4302 lookup
.assign (str
, i
);
4303 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4304 EXPECT ("function"));
4308 /* While "w" is a prefix of both components, the match function
4309 should still only be called once. */
4311 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4313 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4317 /* Same, with a "complicated" symbol. */
4319 static const char str
[] = Z_SYM_NAME
;
4320 size_t len
= strlen (str
);
4323 for (size_t i
= 1; i
< len
; i
++)
4325 lookup
.assign (str
, i
);
4326 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4327 EXPECT (Z_SYM_NAME
));
4331 /* In FULL mode, an incomplete symbol doesn't match. */
4333 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4337 /* A complete symbol with parameters matches any overload, since the
4338 index has no overload info. */
4340 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4341 EXPECT ("std::zfunction", "std::zfunction2"));
4342 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4343 EXPECT ("std::zfunction", "std::zfunction2"));
4344 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4345 EXPECT ("std::zfunction", "std::zfunction2"));
4348 /* Check that whitespace is ignored appropriately. A symbol with a
4349 template argument list. */
4351 static const char expected
[] = "ns::foo<int>";
4352 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4354 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4358 /* Check that whitespace is ignored appropriately. A symbol with a
4359 template argument list that includes a pointer. */
4361 static const char expected
[] = "ns::foo<char*>";
4362 /* Try both completion and non-completion modes. */
4363 static const bool completion_mode
[2] = {false, true};
4364 for (size_t i
= 0; i
< 2; i
++)
4366 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4367 completion_mode
[i
], EXPECT (expected
));
4368 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4369 completion_mode
[i
], EXPECT (expected
));
4371 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4372 completion_mode
[i
], EXPECT (expected
));
4373 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4374 completion_mode
[i
], EXPECT (expected
));
4379 /* Check method qualifiers are ignored. */
4380 static const char expected
[] = "ns::foo<char*>";
4381 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4382 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4383 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4384 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4385 CHECK_MATCH ("foo < char * > ( int ) const",
4386 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4387 CHECK_MATCH ("foo < char * > ( int ) &&",
4388 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4391 /* Test lookup names that don't match anything. */
4393 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4396 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4400 /* Some wild matching tests, exercising "(anonymous namespace)",
4401 which should not be confused with a parameter list. */
4403 static const char *syms
[] = {
4407 "A :: B :: C ( int )",
4412 for (const char *s
: syms
)
4414 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4415 EXPECT ("(anonymous namespace)::A::B::C"));
4420 static const char expected
[] = "ns2::tmpl<int>::foo2";
4421 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4423 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4427 SELF_CHECK (!any_mismatch
);
4436 test_mapped_index_find_name_component_bounds ();
4437 test_dw2_expand_symtabs_matching_symbol ();
4440 }} // namespace selftests::dw2_expand_symtabs_matching
4442 #endif /* GDB_SELF_TEST */
4444 /* If FILE_MATCHER is NULL or if PER_CU has
4445 dwarf2_per_cu_quick_data::MARK set (see
4446 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4447 EXPANSION_NOTIFY on it. */
4450 dw2_expand_symtabs_matching_one
4451 (struct dwarf2_per_cu_data
*per_cu
,
4452 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4453 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4455 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4457 bool symtab_was_null
4458 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4460 dw2_instantiate_symtab (per_cu
, false);
4462 if (expansion_notify
!= NULL
4464 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4465 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4469 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4470 matched, to expand corresponding CUs that were marked. IDX is the
4471 index of the symbol name that matched. */
4474 dw2_expand_marked_cus
4475 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4476 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4477 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4480 offset_type
*vec
, vec_len
, vec_idx
;
4481 bool global_seen
= false;
4482 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4484 vec
= (offset_type
*) (index
.constant_pool
4485 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4486 vec_len
= MAYBE_SWAP (vec
[0]);
4487 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4489 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4490 /* This value is only valid for index versions >= 7. */
4491 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4492 gdb_index_symbol_kind symbol_kind
=
4493 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4494 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4495 /* Only check the symbol attributes if they're present.
4496 Indices prior to version 7 don't record them,
4497 and indices >= 7 may elide them for certain symbols
4498 (gold does this). */
4501 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4503 /* Work around gold/15646. */
4506 if (!is_static
&& global_seen
)
4512 /* Only check the symbol's kind if it has one. */
4517 case VARIABLES_DOMAIN
:
4518 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4521 case FUNCTIONS_DOMAIN
:
4522 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4526 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4529 case MODULES_DOMAIN
:
4530 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4538 /* Don't crash on bad data. */
4539 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4540 + dwarf2_per_objfile
->all_type_units
.size ()))
4542 complaint (_(".gdb_index entry has bad CU index"
4544 objfile_name (dwarf2_per_objfile
->objfile
));
4548 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4549 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4554 /* If FILE_MATCHER is non-NULL, set all the
4555 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4556 that match FILE_MATCHER. */
4559 dw_expand_symtabs_matching_file_matcher
4560 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4561 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4563 if (file_matcher
== NULL
)
4566 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4568 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4570 NULL
, xcalloc
, xfree
));
4571 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4573 NULL
, xcalloc
, xfree
));
4575 /* The rule is CUs specify all the files, including those used by
4576 any TU, so there's no need to scan TUs here. */
4578 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4582 per_cu
->v
.quick
->mark
= 0;
4584 /* We only need to look at symtabs not already expanded. */
4585 if (per_cu
->v
.quick
->compunit_symtab
)
4588 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4589 if (file_data
== NULL
)
4592 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4594 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4596 per_cu
->v
.quick
->mark
= 1;
4600 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4602 const char *this_real_name
;
4604 if (file_matcher (file_data
->file_names
[j
], false))
4606 per_cu
->v
.quick
->mark
= 1;
4610 /* Before we invoke realpath, which can get expensive when many
4611 files are involved, do a quick comparison of the basenames. */
4612 if (!basenames_may_differ
4613 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4617 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4618 if (file_matcher (this_real_name
, false))
4620 per_cu
->v
.quick
->mark
= 1;
4625 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4626 ? visited_found
.get ()
4627 : visited_not_found
.get (),
4634 dw2_expand_symtabs_matching
4635 (struct objfile
*objfile
,
4636 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4637 const lookup_name_info
*lookup_name
,
4638 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4639 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4640 enum search_domain kind
)
4642 struct dwarf2_per_objfile
*dwarf2_per_objfile
4643 = get_dwarf2_per_objfile (objfile
);
4645 /* index_table is NULL if OBJF_READNOW. */
4646 if (!dwarf2_per_objfile
->index_table
)
4649 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4651 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4653 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4657 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4663 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4665 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4667 kind
, [&] (offset_type idx
)
4669 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4670 expansion_notify
, kind
);
4675 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4678 static struct compunit_symtab
*
4679 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4684 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4685 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4688 if (cust
->includes
== NULL
)
4691 for (i
= 0; cust
->includes
[i
]; ++i
)
4693 struct compunit_symtab
*s
= cust
->includes
[i
];
4695 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4703 static struct compunit_symtab
*
4704 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4705 struct bound_minimal_symbol msymbol
,
4707 struct obj_section
*section
,
4710 struct dwarf2_per_cu_data
*data
;
4711 struct compunit_symtab
*result
;
4713 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4716 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4717 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4718 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4722 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4723 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4724 paddress (objfile
->arch (), pc
));
4727 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4730 gdb_assert (result
!= NULL
);
4735 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4736 void *data
, int need_fullname
)
4738 struct dwarf2_per_objfile
*dwarf2_per_objfile
4739 = get_dwarf2_per_objfile (objfile
);
4741 if (!dwarf2_per_objfile
->filenames_cache
)
4743 dwarf2_per_objfile
->filenames_cache
.emplace ();
4745 htab_up
visited (htab_create_alloc (10,
4746 htab_hash_pointer
, htab_eq_pointer
,
4747 NULL
, xcalloc
, xfree
));
4749 /* The rule is CUs specify all the files, including those used
4750 by any TU, so there's no need to scan TUs here. We can
4751 ignore file names coming from already-expanded CUs. */
4753 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4755 if (per_cu
->v
.quick
->compunit_symtab
)
4757 void **slot
= htab_find_slot (visited
.get (),
4758 per_cu
->v
.quick
->file_names
,
4761 *slot
= per_cu
->v
.quick
->file_names
;
4765 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4767 /* We only need to look at symtabs not already expanded. */
4768 if (per_cu
->v
.quick
->compunit_symtab
)
4771 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4772 if (file_data
== NULL
)
4775 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4778 /* Already visited. */
4783 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4785 const char *filename
= file_data
->file_names
[j
];
4786 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4791 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4793 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4796 this_real_name
= gdb_realpath (filename
);
4797 (*fun
) (filename
, this_real_name
.get (), data
);
4802 dw2_has_symbols (struct objfile
*objfile
)
4807 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4810 dw2_find_last_source_symtab
,
4811 dw2_forget_cached_source_info
,
4812 dw2_map_symtabs_matching_filename
,
4817 dw2_expand_symtabs_for_function
,
4818 dw2_expand_all_symtabs
,
4819 dw2_expand_symtabs_with_fullname
,
4820 dw2_map_matching_symbols
,
4821 dw2_expand_symtabs_matching
,
4822 dw2_find_pc_sect_compunit_symtab
,
4824 dw2_map_symbol_filenames
4827 /* DWARF-5 debug_names reader. */
4829 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4830 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4832 /* A helper function that reads the .debug_names section in SECTION
4833 and fills in MAP. FILENAME is the name of the file containing the
4834 section; it is used for error reporting.
4836 Returns true if all went well, false otherwise. */
4839 read_debug_names_from_section (struct objfile
*objfile
,
4840 const char *filename
,
4841 struct dwarf2_section_info
*section
,
4842 mapped_debug_names
&map
)
4844 if (section
->empty ())
4847 /* Older elfutils strip versions could keep the section in the main
4848 executable while splitting it for the separate debug info file. */
4849 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4852 section
->read (objfile
);
4854 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4856 const gdb_byte
*addr
= section
->buffer
;
4858 bfd
*const abfd
= section
->get_bfd_owner ();
4860 unsigned int bytes_read
;
4861 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4864 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4865 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4866 if (bytes_read
+ length
!= section
->size
)
4868 /* There may be multiple per-CU indices. */
4869 warning (_("Section .debug_names in %s length %s does not match "
4870 "section length %s, ignoring .debug_names."),
4871 filename
, plongest (bytes_read
+ length
),
4872 pulongest (section
->size
));
4876 /* The version number. */
4877 uint16_t version
= read_2_bytes (abfd
, addr
);
4881 warning (_("Section .debug_names in %s has unsupported version %d, "
4882 "ignoring .debug_names."),
4888 uint16_t padding
= read_2_bytes (abfd
, addr
);
4892 warning (_("Section .debug_names in %s has unsupported padding %d, "
4893 "ignoring .debug_names."),
4898 /* comp_unit_count - The number of CUs in the CU list. */
4899 map
.cu_count
= read_4_bytes (abfd
, addr
);
4902 /* local_type_unit_count - The number of TUs in the local TU
4904 map
.tu_count
= read_4_bytes (abfd
, addr
);
4907 /* foreign_type_unit_count - The number of TUs in the foreign TU
4909 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4911 if (foreign_tu_count
!= 0)
4913 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4914 "ignoring .debug_names."),
4915 filename
, static_cast<unsigned long> (foreign_tu_count
));
4919 /* bucket_count - The number of hash buckets in the hash lookup
4921 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4924 /* name_count - The number of unique names in the index. */
4925 map
.name_count
= read_4_bytes (abfd
, addr
);
4928 /* abbrev_table_size - The size in bytes of the abbreviations
4930 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4933 /* augmentation_string_size - The size in bytes of the augmentation
4934 string. This value is rounded up to a multiple of 4. */
4935 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4937 map
.augmentation_is_gdb
= ((augmentation_string_size
4938 == sizeof (dwarf5_augmentation
))
4939 && memcmp (addr
, dwarf5_augmentation
,
4940 sizeof (dwarf5_augmentation
)) == 0);
4941 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4942 addr
+= augmentation_string_size
;
4945 map
.cu_table_reordered
= addr
;
4946 addr
+= map
.cu_count
* map
.offset_size
;
4948 /* List of Local TUs */
4949 map
.tu_table_reordered
= addr
;
4950 addr
+= map
.tu_count
* map
.offset_size
;
4952 /* Hash Lookup Table */
4953 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4954 addr
+= map
.bucket_count
* 4;
4955 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4956 addr
+= map
.name_count
* 4;
4959 map
.name_table_string_offs_reordered
= addr
;
4960 addr
+= map
.name_count
* map
.offset_size
;
4961 map
.name_table_entry_offs_reordered
= addr
;
4962 addr
+= map
.name_count
* map
.offset_size
;
4964 const gdb_byte
*abbrev_table_start
= addr
;
4967 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4972 const auto insertpair
4973 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
4974 if (!insertpair
.second
)
4976 warning (_("Section .debug_names in %s has duplicate index %s, "
4977 "ignoring .debug_names."),
4978 filename
, pulongest (index_num
));
4981 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
4982 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4987 mapped_debug_names::index_val::attr attr
;
4988 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4990 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4992 if (attr
.form
== DW_FORM_implicit_const
)
4994 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
4998 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5000 indexval
.attr_vec
.push_back (std::move (attr
));
5003 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5005 warning (_("Section .debug_names in %s has abbreviation_table "
5006 "of size %s vs. written as %u, ignoring .debug_names."),
5007 filename
, plongest (addr
- abbrev_table_start
),
5011 map
.entry_pool
= addr
;
5016 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5020 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5021 const mapped_debug_names
&map
,
5022 dwarf2_section_info
§ion
,
5025 sect_offset sect_off_prev
;
5026 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5028 sect_offset sect_off_next
;
5029 if (i
< map
.cu_count
)
5032 = (sect_offset
) (extract_unsigned_integer
5033 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5035 map
.dwarf5_byte_order
));
5038 sect_off_next
= (sect_offset
) section
.size
;
5041 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5042 dwarf2_per_cu_data
*per_cu
5043 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5044 sect_off_prev
, length
);
5045 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5047 sect_off_prev
= sect_off_next
;
5051 /* Read the CU list from the mapped index, and use it to create all
5052 the CU objects for this dwarf2_per_objfile. */
5055 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5056 const mapped_debug_names
&map
,
5057 const mapped_debug_names
&dwz_map
)
5059 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5060 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5062 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5063 dwarf2_per_objfile
->info
,
5064 false /* is_dwz */);
5066 if (dwz_map
.cu_count
== 0)
5069 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5070 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5074 /* Read .debug_names. If everything went ok, initialize the "quick"
5075 elements of all the CUs and return true. Otherwise, return false. */
5078 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5080 std::unique_ptr
<mapped_debug_names
> map
5081 (new mapped_debug_names (dwarf2_per_objfile
));
5082 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5083 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5085 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5086 &dwarf2_per_objfile
->debug_names
,
5090 /* Don't use the index if it's empty. */
5091 if (map
->name_count
== 0)
5094 /* If there is a .dwz file, read it so we can get its CU list as
5096 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5099 if (!read_debug_names_from_section (objfile
,
5100 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5101 &dwz
->debug_names
, dwz_map
))
5103 warning (_("could not read '.debug_names' section from %s; skipping"),
5104 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5109 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5111 if (map
->tu_count
!= 0)
5113 /* We can only handle a single .debug_types when we have an
5115 if (dwarf2_per_objfile
->types
.size () != 1)
5118 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5120 create_signatured_type_table_from_debug_names
5121 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5124 create_addrmap_from_aranges (dwarf2_per_objfile
,
5125 &dwarf2_per_objfile
->debug_aranges
);
5127 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5128 dwarf2_per_objfile
->using_index
= 1;
5129 dwarf2_per_objfile
->quick_file_names_table
=
5130 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5135 /* Type used to manage iterating over all CUs looking for a symbol for
5138 class dw2_debug_names_iterator
5141 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5142 gdb::optional
<block_enum
> block_index
,
5145 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5146 m_addr (find_vec_in_debug_names (map
, name
))
5149 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5150 search_domain search
, uint32_t namei
)
5153 m_addr (find_vec_in_debug_names (map
, namei
))
5156 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5157 block_enum block_index
, domain_enum domain
,
5159 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5160 m_addr (find_vec_in_debug_names (map
, namei
))
5163 /* Return the next matching CU or NULL if there are no more. */
5164 dwarf2_per_cu_data
*next ();
5167 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5169 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5172 /* The internalized form of .debug_names. */
5173 const mapped_debug_names
&m_map
;
5175 /* If set, only look for symbols that match that block. Valid values are
5176 GLOBAL_BLOCK and STATIC_BLOCK. */
5177 const gdb::optional
<block_enum
> m_block_index
;
5179 /* The kind of symbol we're looking for. */
5180 const domain_enum m_domain
= UNDEF_DOMAIN
;
5181 const search_domain m_search
= ALL_DOMAIN
;
5183 /* The list of CUs from the index entry of the symbol, or NULL if
5185 const gdb_byte
*m_addr
;
5189 mapped_debug_names::namei_to_name (uint32_t namei
) const
5191 const ULONGEST namei_string_offs
5192 = extract_unsigned_integer ((name_table_string_offs_reordered
5193 + namei
* offset_size
),
5196 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5200 /* Find a slot in .debug_names for the object named NAME. If NAME is
5201 found, return pointer to its pool data. If NAME cannot be found,
5205 dw2_debug_names_iterator::find_vec_in_debug_names
5206 (const mapped_debug_names
&map
, const char *name
)
5208 int (*cmp
) (const char *, const char *);
5210 gdb::unique_xmalloc_ptr
<char> without_params
;
5211 if (current_language
->la_language
== language_cplus
5212 || current_language
->la_language
== language_fortran
5213 || current_language
->la_language
== language_d
)
5215 /* NAME is already canonical. Drop any qualifiers as
5216 .debug_names does not contain any. */
5218 if (strchr (name
, '(') != NULL
)
5220 without_params
= cp_remove_params (name
);
5221 if (without_params
!= NULL
)
5222 name
= without_params
.get ();
5226 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5228 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5230 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5231 (map
.bucket_table_reordered
5232 + (full_hash
% map
.bucket_count
)), 4,
5233 map
.dwarf5_byte_order
);
5237 if (namei
>= map
.name_count
)
5239 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5241 namei
, map
.name_count
,
5242 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5248 const uint32_t namei_full_hash
5249 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5250 (map
.hash_table_reordered
+ namei
), 4,
5251 map
.dwarf5_byte_order
);
5252 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5255 if (full_hash
== namei_full_hash
)
5257 const char *const namei_string
= map
.namei_to_name (namei
);
5259 #if 0 /* An expensive sanity check. */
5260 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5262 complaint (_("Wrong .debug_names hash for string at index %u "
5264 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5269 if (cmp (namei_string
, name
) == 0)
5271 const ULONGEST namei_entry_offs
5272 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5273 + namei
* map
.offset_size
),
5274 map
.offset_size
, map
.dwarf5_byte_order
);
5275 return map
.entry_pool
+ namei_entry_offs
;
5280 if (namei
>= map
.name_count
)
5286 dw2_debug_names_iterator::find_vec_in_debug_names
5287 (const mapped_debug_names
&map
, uint32_t namei
)
5289 if (namei
>= map
.name_count
)
5291 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5293 namei
, map
.name_count
,
5294 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5298 const ULONGEST namei_entry_offs
5299 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5300 + namei
* map
.offset_size
),
5301 map
.offset_size
, map
.dwarf5_byte_order
);
5302 return map
.entry_pool
+ namei_entry_offs
;
5305 /* See dw2_debug_names_iterator. */
5307 dwarf2_per_cu_data
*
5308 dw2_debug_names_iterator::next ()
5313 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5314 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5315 bfd
*const abfd
= objfile
->obfd
;
5319 unsigned int bytes_read
;
5320 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5321 m_addr
+= bytes_read
;
5325 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5326 if (indexval_it
== m_map
.abbrev_map
.cend ())
5328 complaint (_("Wrong .debug_names undefined abbrev code %s "
5330 pulongest (abbrev
), objfile_name (objfile
));
5333 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5334 enum class symbol_linkage
{
5338 } symbol_linkage_
= symbol_linkage::unknown
;
5339 dwarf2_per_cu_data
*per_cu
= NULL
;
5340 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5345 case DW_FORM_implicit_const
:
5346 ull
= attr
.implicit_const
;
5348 case DW_FORM_flag_present
:
5352 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5353 m_addr
+= bytes_read
;
5356 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5357 dwarf_form_name (attr
.form
),
5358 objfile_name (objfile
));
5361 switch (attr
.dw_idx
)
5363 case DW_IDX_compile_unit
:
5364 /* Don't crash on bad data. */
5365 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5367 complaint (_(".debug_names entry has bad CU index %s"
5370 objfile_name (dwarf2_per_objfile
->objfile
));
5373 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5375 case DW_IDX_type_unit
:
5376 /* Don't crash on bad data. */
5377 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5379 complaint (_(".debug_names entry has bad TU index %s"
5382 objfile_name (dwarf2_per_objfile
->objfile
));
5385 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5387 case DW_IDX_GNU_internal
:
5388 if (!m_map
.augmentation_is_gdb
)
5390 symbol_linkage_
= symbol_linkage::static_
;
5392 case DW_IDX_GNU_external
:
5393 if (!m_map
.augmentation_is_gdb
)
5395 symbol_linkage_
= symbol_linkage::extern_
;
5400 /* Skip if already read in. */
5401 if (per_cu
->v
.quick
->compunit_symtab
)
5404 /* Check static vs global. */
5405 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5407 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5408 const bool symbol_is_static
=
5409 symbol_linkage_
== symbol_linkage::static_
;
5410 if (want_static
!= symbol_is_static
)
5414 /* Match dw2_symtab_iter_next, symbol_kind
5415 and debug_names::psymbol_tag. */
5419 switch (indexval
.dwarf_tag
)
5421 case DW_TAG_variable
:
5422 case DW_TAG_subprogram
:
5423 /* Some types are also in VAR_DOMAIN. */
5424 case DW_TAG_typedef
:
5425 case DW_TAG_structure_type
:
5432 switch (indexval
.dwarf_tag
)
5434 case DW_TAG_typedef
:
5435 case DW_TAG_structure_type
:
5442 switch (indexval
.dwarf_tag
)
5445 case DW_TAG_variable
:
5452 switch (indexval
.dwarf_tag
)
5464 /* Match dw2_expand_symtabs_matching, symbol_kind and
5465 debug_names::psymbol_tag. */
5468 case VARIABLES_DOMAIN
:
5469 switch (indexval
.dwarf_tag
)
5471 case DW_TAG_variable
:
5477 case FUNCTIONS_DOMAIN
:
5478 switch (indexval
.dwarf_tag
)
5480 case DW_TAG_subprogram
:
5487 switch (indexval
.dwarf_tag
)
5489 case DW_TAG_typedef
:
5490 case DW_TAG_structure_type
:
5496 case MODULES_DOMAIN
:
5497 switch (indexval
.dwarf_tag
)
5511 static struct compunit_symtab
*
5512 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5513 const char *name
, domain_enum domain
)
5515 struct dwarf2_per_objfile
*dwarf2_per_objfile
5516 = get_dwarf2_per_objfile (objfile
);
5518 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5521 /* index is NULL if OBJF_READNOW. */
5524 const auto &map
= *mapp
;
5526 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5528 struct compunit_symtab
*stab_best
= NULL
;
5529 struct dwarf2_per_cu_data
*per_cu
;
5530 while ((per_cu
= iter
.next ()) != NULL
)
5532 struct symbol
*sym
, *with_opaque
= NULL
;
5533 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5534 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5535 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5537 sym
= block_find_symbol (block
, name
, domain
,
5538 block_find_non_opaque_type_preferred
,
5541 /* Some caution must be observed with overloaded functions and
5542 methods, since the index will not contain any overload
5543 information (but NAME might contain it). */
5546 && strcmp_iw (sym
->search_name (), name
) == 0)
5548 if (with_opaque
!= NULL
5549 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5552 /* Keep looking through other CUs. */
5558 /* This dumps minimal information about .debug_names. It is called
5559 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5560 uses this to verify that .debug_names has been loaded. */
5563 dw2_debug_names_dump (struct objfile
*objfile
)
5565 struct dwarf2_per_objfile
*dwarf2_per_objfile
5566 = get_dwarf2_per_objfile (objfile
);
5568 gdb_assert (dwarf2_per_objfile
->using_index
);
5569 printf_filtered (".debug_names:");
5570 if (dwarf2_per_objfile
->debug_names_table
)
5571 printf_filtered (" exists\n");
5573 printf_filtered (" faked for \"readnow\"\n");
5574 printf_filtered ("\n");
5578 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5579 const char *func_name
)
5581 struct dwarf2_per_objfile
*dwarf2_per_objfile
5582 = get_dwarf2_per_objfile (objfile
);
5584 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5585 if (dwarf2_per_objfile
->debug_names_table
)
5587 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5589 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5591 struct dwarf2_per_cu_data
*per_cu
;
5592 while ((per_cu
= iter
.next ()) != NULL
)
5593 dw2_instantiate_symtab (per_cu
, false);
5598 dw2_debug_names_map_matching_symbols
5599 (struct objfile
*objfile
,
5600 const lookup_name_info
&name
, domain_enum domain
,
5602 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5603 symbol_compare_ftype
*ordered_compare
)
5605 struct dwarf2_per_objfile
*dwarf2_per_objfile
5606 = get_dwarf2_per_objfile (objfile
);
5608 /* debug_names_table is NULL if OBJF_READNOW. */
5609 if (!dwarf2_per_objfile
->debug_names_table
)
5612 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5613 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5615 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5616 auto matcher
= [&] (const char *symname
)
5618 if (ordered_compare
== nullptr)
5620 return ordered_compare (symname
, match_name
) == 0;
5623 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5624 [&] (offset_type namei
)
5626 /* The name was matched, now expand corresponding CUs that were
5628 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5630 struct dwarf2_per_cu_data
*per_cu
;
5631 while ((per_cu
= iter
.next ()) != NULL
)
5632 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5636 /* It's a shame we couldn't do this inside the
5637 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5638 that have already been expanded. Instead, this loop matches what
5639 the psymtab code does. */
5640 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5642 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5643 if (cust
!= nullptr)
5645 const struct block
*block
5646 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5647 if (!iterate_over_symbols_terminated (block
, name
,
5655 dw2_debug_names_expand_symtabs_matching
5656 (struct objfile
*objfile
,
5657 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5658 const lookup_name_info
*lookup_name
,
5659 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5660 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5661 enum search_domain kind
)
5663 struct dwarf2_per_objfile
*dwarf2_per_objfile
5664 = get_dwarf2_per_objfile (objfile
);
5666 /* debug_names_table is NULL if OBJF_READNOW. */
5667 if (!dwarf2_per_objfile
->debug_names_table
)
5670 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5672 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5674 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5678 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5684 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5686 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5688 kind
, [&] (offset_type namei
)
5690 /* The name was matched, now expand corresponding CUs that were
5692 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5694 struct dwarf2_per_cu_data
*per_cu
;
5695 while ((per_cu
= iter
.next ()) != NULL
)
5696 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5702 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5705 dw2_find_last_source_symtab
,
5706 dw2_forget_cached_source_info
,
5707 dw2_map_symtabs_matching_filename
,
5708 dw2_debug_names_lookup_symbol
,
5711 dw2_debug_names_dump
,
5712 dw2_debug_names_expand_symtabs_for_function
,
5713 dw2_expand_all_symtabs
,
5714 dw2_expand_symtabs_with_fullname
,
5715 dw2_debug_names_map_matching_symbols
,
5716 dw2_debug_names_expand_symtabs_matching
,
5717 dw2_find_pc_sect_compunit_symtab
,
5719 dw2_map_symbol_filenames
5722 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5723 to either a dwarf2_per_objfile or dwz_file object. */
5725 template <typename T
>
5726 static gdb::array_view
<const gdb_byte
>
5727 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5729 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5731 if (section
->empty ())
5734 /* Older elfutils strip versions could keep the section in the main
5735 executable while splitting it for the separate debug info file. */
5736 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5739 section
->read (obj
);
5741 /* dwarf2_section_info::size is a bfd_size_type, while
5742 gdb::array_view works with size_t. On 32-bit hosts, with
5743 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5744 is 32-bit. So we need an explicit narrowing conversion here.
5745 This is fine, because it's impossible to allocate or mmap an
5746 array/buffer larger than what size_t can represent. */
5747 return gdb::make_array_view (section
->buffer
, section
->size
);
5750 /* Lookup the index cache for the contents of the index associated to
5753 static gdb::array_view
<const gdb_byte
>
5754 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5756 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5757 if (build_id
== nullptr)
5760 return global_index_cache
.lookup_gdb_index (build_id
,
5761 &dwarf2_obj
->index_cache_res
);
5764 /* Same as the above, but for DWZ. */
5766 static gdb::array_view
<const gdb_byte
>
5767 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5769 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5770 if (build_id
== nullptr)
5773 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5776 /* See symfile.h. */
5779 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5781 struct dwarf2_per_objfile
*dwarf2_per_objfile
5782 = get_dwarf2_per_objfile (objfile
);
5784 /* If we're about to read full symbols, don't bother with the
5785 indices. In this case we also don't care if some other debug
5786 format is making psymtabs, because they are all about to be
5788 if ((objfile
->flags
& OBJF_READNOW
))
5790 dwarf2_per_objfile
->using_index
= 1;
5791 create_all_comp_units (dwarf2_per_objfile
);
5792 create_all_type_units (dwarf2_per_objfile
);
5793 dwarf2_per_objfile
->quick_file_names_table
5794 = create_quick_file_names_table
5795 (dwarf2_per_objfile
->all_comp_units
.size ());
5797 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5798 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5800 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5802 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5803 struct dwarf2_per_cu_quick_data
);
5806 /* Return 1 so that gdb sees the "quick" functions. However,
5807 these functions will be no-ops because we will have expanded
5809 *index_kind
= dw_index_kind::GDB_INDEX
;
5813 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5815 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5819 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5820 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5821 get_gdb_index_contents_from_section
<dwz_file
>))
5823 *index_kind
= dw_index_kind::GDB_INDEX
;
5827 /* ... otherwise, try to find the index in the index cache. */
5828 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5829 get_gdb_index_contents_from_cache
,
5830 get_gdb_index_contents_from_cache_dwz
))
5832 global_index_cache
.hit ();
5833 *index_kind
= dw_index_kind::GDB_INDEX
;
5837 global_index_cache
.miss ();
5843 /* Build a partial symbol table. */
5846 dwarf2_build_psymtabs (struct objfile
*objfile
)
5848 struct dwarf2_per_objfile
*dwarf2_per_objfile
5849 = get_dwarf2_per_objfile (objfile
);
5851 init_psymbol_list (objfile
, 1024);
5855 /* This isn't really ideal: all the data we allocate on the
5856 objfile's obstack is still uselessly kept around. However,
5857 freeing it seems unsafe. */
5858 psymtab_discarder
psymtabs (objfile
);
5859 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5862 /* (maybe) store an index in the cache. */
5863 global_index_cache
.store (dwarf2_per_objfile
);
5865 catch (const gdb_exception_error
&except
)
5867 exception_print (gdb_stderr
, except
);
5871 /* Find the base address of the compilation unit for range lists and
5872 location lists. It will normally be specified by DW_AT_low_pc.
5873 In DWARF-3 draft 4, the base address could be overridden by
5874 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5875 compilation units with discontinuous ranges. */
5878 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5880 struct attribute
*attr
;
5882 cu
->base_address
.reset ();
5884 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5885 if (attr
!= nullptr)
5886 cu
->base_address
= attr
->value_as_address ();
5889 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5890 if (attr
!= nullptr)
5891 cu
->base_address
= attr
->value_as_address ();
5895 /* Helper function that returns the proper abbrev section for
5898 static struct dwarf2_section_info
*
5899 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5901 struct dwarf2_section_info
*abbrev
;
5902 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5904 if (this_cu
->is_dwz
)
5905 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5907 abbrev
= &dwarf2_per_objfile
->abbrev
;
5912 /* Fetch the abbreviation table offset from a comp or type unit header. */
5915 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5916 struct dwarf2_section_info
*section
,
5917 sect_offset sect_off
)
5919 bfd
*abfd
= section
->get_bfd_owner ();
5920 const gdb_byte
*info_ptr
;
5921 unsigned int initial_length_size
, offset_size
;
5924 section
->read (dwarf2_per_objfile
->objfile
);
5925 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5926 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5927 offset_size
= initial_length_size
== 4 ? 4 : 8;
5928 info_ptr
+= initial_length_size
;
5930 version
= read_2_bytes (abfd
, info_ptr
);
5934 /* Skip unit type and address size. */
5938 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
5941 /* A partial symtab that is used only for include files. */
5942 struct dwarf2_include_psymtab
: public partial_symtab
5944 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
5945 : partial_symtab (filename
, objfile
)
5949 void read_symtab (struct objfile
*objfile
) override
5951 /* It's an include file, no symbols to read for it.
5952 Everything is in the includer symtab. */
5954 /* The expansion of a dwarf2_include_psymtab is just a trigger for
5955 expansion of the includer psymtab. We use the dependencies[0] field to
5956 model the includer. But if we go the regular route of calling
5957 expand_psymtab here, and having expand_psymtab call expand_dependencies
5958 to expand the includer, we'll only use expand_psymtab on the includer
5959 (making it a non-toplevel psymtab), while if we expand the includer via
5960 another path, we'll use read_symtab (making it a toplevel psymtab).
5961 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
5962 psymtab, and trigger read_symtab on the includer here directly. */
5963 includer ()->read_symtab (objfile
);
5966 void expand_psymtab (struct objfile
*objfile
) override
5968 /* This is not called by read_symtab, and should not be called by any
5969 expand_dependencies. */
5973 bool readin_p () const override
5975 return includer ()->readin_p ();
5978 struct compunit_symtab
*get_compunit_symtab () const override
5984 partial_symtab
*includer () const
5986 /* An include psymtab has exactly one dependency: the psymtab that
5988 gdb_assert (this->number_of_dependencies
== 1);
5989 return this->dependencies
[0];
5993 /* Allocate a new partial symtab for file named NAME and mark this new
5994 partial symtab as being an include of PST. */
5997 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
5998 struct objfile
*objfile
)
6000 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6002 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6004 /* It shares objfile->objfile_obstack. */
6005 subpst
->dirname
= pst
->dirname
;
6008 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6009 subpst
->dependencies
[0] = pst
;
6010 subpst
->number_of_dependencies
= 1;
6013 /* Read the Line Number Program data and extract the list of files
6014 included by the source file represented by PST. Build an include
6015 partial symtab for each of these included files. */
6018 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6019 struct die_info
*die
,
6020 dwarf2_psymtab
*pst
)
6023 struct attribute
*attr
;
6025 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6026 if (attr
!= nullptr)
6027 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6029 return; /* No linetable, so no includes. */
6031 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6032 that we pass in the raw text_low here; that is ok because we're
6033 only decoding the line table to make include partial symtabs, and
6034 so the addresses aren't really used. */
6035 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6036 pst
->raw_text_low (), 1);
6040 hash_signatured_type (const void *item
)
6042 const struct signatured_type
*sig_type
6043 = (const struct signatured_type
*) item
;
6045 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6046 return sig_type
->signature
;
6050 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6052 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6053 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6055 return lhs
->signature
== rhs
->signature
;
6058 /* Allocate a hash table for signatured types. */
6061 allocate_signatured_type_table ()
6063 return htab_up (htab_create_alloc (41,
6064 hash_signatured_type
,
6066 NULL
, xcalloc
, xfree
));
6069 /* A helper function to add a signatured type CU to a table. */
6072 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6074 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6075 std::vector
<signatured_type
*> *all_type_units
6076 = (std::vector
<signatured_type
*> *) datum
;
6078 all_type_units
->push_back (sigt
);
6083 /* A helper for create_debug_types_hash_table. Read types from SECTION
6084 and fill them into TYPES_HTAB. It will process only type units,
6085 therefore DW_UT_type. */
6088 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6089 struct dwo_file
*dwo_file
,
6090 dwarf2_section_info
*section
, htab_up
&types_htab
,
6091 rcuh_kind section_kind
)
6093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6094 struct dwarf2_section_info
*abbrev_section
;
6096 const gdb_byte
*info_ptr
, *end_ptr
;
6098 abbrev_section
= (dwo_file
!= NULL
6099 ? &dwo_file
->sections
.abbrev
6100 : &dwarf2_per_objfile
->abbrev
);
6102 if (dwarf_read_debug
)
6103 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6104 section
->get_name (),
6105 abbrev_section
->get_file_name ());
6107 section
->read (objfile
);
6108 info_ptr
= section
->buffer
;
6110 if (info_ptr
== NULL
)
6113 /* We can't set abfd until now because the section may be empty or
6114 not present, in which case the bfd is unknown. */
6115 abfd
= section
->get_bfd_owner ();
6117 /* We don't use cutu_reader here because we don't need to read
6118 any dies: the signature is in the header. */
6120 end_ptr
= info_ptr
+ section
->size
;
6121 while (info_ptr
< end_ptr
)
6123 struct signatured_type
*sig_type
;
6124 struct dwo_unit
*dwo_tu
;
6126 const gdb_byte
*ptr
= info_ptr
;
6127 struct comp_unit_head header
;
6128 unsigned int length
;
6130 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6132 /* Initialize it due to a false compiler warning. */
6133 header
.signature
= -1;
6134 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6136 /* We need to read the type's signature in order to build the hash
6137 table, but we don't need anything else just yet. */
6139 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6140 abbrev_section
, ptr
, section_kind
);
6142 length
= header
.get_length ();
6144 /* Skip dummy type units. */
6145 if (ptr
>= info_ptr
+ length
6146 || peek_abbrev_code (abfd
, ptr
) == 0
6147 || header
.unit_type
!= DW_UT_type
)
6153 if (types_htab
== NULL
)
6156 types_htab
= allocate_dwo_unit_table ();
6158 types_htab
= allocate_signatured_type_table ();
6164 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6166 dwo_tu
->dwo_file
= dwo_file
;
6167 dwo_tu
->signature
= header
.signature
;
6168 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6169 dwo_tu
->section
= section
;
6170 dwo_tu
->sect_off
= sect_off
;
6171 dwo_tu
->length
= length
;
6175 /* N.B.: type_offset is not usable if this type uses a DWO file.
6176 The real type_offset is in the DWO file. */
6178 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6179 struct signatured_type
);
6180 sig_type
->signature
= header
.signature
;
6181 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6182 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6183 sig_type
->per_cu
.is_debug_types
= 1;
6184 sig_type
->per_cu
.section
= section
;
6185 sig_type
->per_cu
.sect_off
= sect_off
;
6186 sig_type
->per_cu
.length
= length
;
6189 slot
= htab_find_slot (types_htab
.get (),
6190 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6192 gdb_assert (slot
!= NULL
);
6195 sect_offset dup_sect_off
;
6199 const struct dwo_unit
*dup_tu
6200 = (const struct dwo_unit
*) *slot
;
6202 dup_sect_off
= dup_tu
->sect_off
;
6206 const struct signatured_type
*dup_tu
6207 = (const struct signatured_type
*) *slot
;
6209 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6212 complaint (_("debug type entry at offset %s is duplicate to"
6213 " the entry at offset %s, signature %s"),
6214 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6215 hex_string (header
.signature
));
6217 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6219 if (dwarf_read_debug
> 1)
6220 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6221 sect_offset_str (sect_off
),
6222 hex_string (header
.signature
));
6228 /* Create the hash table of all entries in the .debug_types
6229 (or .debug_types.dwo) section(s).
6230 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6231 otherwise it is NULL.
6233 The result is a pointer to the hash table or NULL if there are no types.
6235 Note: This function processes DWO files only, not DWP files. */
6238 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6239 struct dwo_file
*dwo_file
,
6240 gdb::array_view
<dwarf2_section_info
> type_sections
,
6241 htab_up
&types_htab
)
6243 for (dwarf2_section_info
§ion
: type_sections
)
6244 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6245 types_htab
, rcuh_kind::TYPE
);
6248 /* Create the hash table of all entries in the .debug_types section,
6249 and initialize all_type_units.
6250 The result is zero if there is an error (e.g. missing .debug_types section),
6251 otherwise non-zero. */
6254 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6258 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6259 &dwarf2_per_objfile
->info
, types_htab
,
6260 rcuh_kind::COMPILE
);
6261 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6262 dwarf2_per_objfile
->types
, types_htab
);
6263 if (types_htab
== NULL
)
6265 dwarf2_per_objfile
->signatured_types
= NULL
;
6269 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6271 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6272 dwarf2_per_objfile
->all_type_units
.reserve
6273 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6275 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6276 add_signatured_type_cu_to_table
,
6277 &dwarf2_per_objfile
->all_type_units
);
6282 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6283 If SLOT is non-NULL, it is the entry to use in the hash table.
6284 Otherwise we find one. */
6286 static struct signatured_type
*
6287 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6290 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6292 if (dwarf2_per_objfile
->all_type_units
.size ()
6293 == dwarf2_per_objfile
->all_type_units
.capacity ())
6294 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6296 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6297 struct signatured_type
);
6299 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6300 sig_type
->signature
= sig
;
6301 sig_type
->per_cu
.is_debug_types
= 1;
6302 if (dwarf2_per_objfile
->using_index
)
6304 sig_type
->per_cu
.v
.quick
=
6305 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6306 struct dwarf2_per_cu_quick_data
);
6311 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6314 gdb_assert (*slot
== NULL
);
6316 /* The rest of sig_type must be filled in by the caller. */
6320 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6321 Fill in SIG_ENTRY with DWO_ENTRY. */
6324 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6325 struct signatured_type
*sig_entry
,
6326 struct dwo_unit
*dwo_entry
)
6328 /* Make sure we're not clobbering something we don't expect to. */
6329 gdb_assert (! sig_entry
->per_cu
.queued
);
6330 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6331 if (dwarf2_per_objfile
->using_index
)
6333 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6334 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6337 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6338 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6339 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6340 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6341 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6343 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6344 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6345 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6346 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6347 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6348 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6349 sig_entry
->dwo_unit
= dwo_entry
;
6352 /* Subroutine of lookup_signatured_type.
6353 If we haven't read the TU yet, create the signatured_type data structure
6354 for a TU to be read in directly from a DWO file, bypassing the stub.
6355 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6356 using .gdb_index, then when reading a CU we want to stay in the DWO file
6357 containing that CU. Otherwise we could end up reading several other DWO
6358 files (due to comdat folding) to process the transitive closure of all the
6359 mentioned TUs, and that can be slow. The current DWO file will have every
6360 type signature that it needs.
6361 We only do this for .gdb_index because in the psymtab case we already have
6362 to read all the DWOs to build the type unit groups. */
6364 static struct signatured_type
*
6365 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6367 struct dwarf2_per_objfile
*dwarf2_per_objfile
6368 = cu
->per_cu
->dwarf2_per_objfile
;
6369 struct dwo_file
*dwo_file
;
6370 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6371 struct signatured_type find_sig_entry
, *sig_entry
;
6374 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6376 /* If TU skeletons have been removed then we may not have read in any
6378 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6379 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6381 /* We only ever need to read in one copy of a signatured type.
6382 Use the global signatured_types array to do our own comdat-folding
6383 of types. If this is the first time we're reading this TU, and
6384 the TU has an entry in .gdb_index, replace the recorded data from
6385 .gdb_index with this TU. */
6387 find_sig_entry
.signature
= sig
;
6388 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6389 &find_sig_entry
, INSERT
);
6390 sig_entry
= (struct signatured_type
*) *slot
;
6392 /* We can get here with the TU already read, *or* in the process of being
6393 read. Don't reassign the global entry to point to this DWO if that's
6394 the case. Also note that if the TU is already being read, it may not
6395 have come from a DWO, the program may be a mix of Fission-compiled
6396 code and non-Fission-compiled code. */
6398 /* Have we already tried to read this TU?
6399 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6400 needn't exist in the global table yet). */
6401 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6404 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6405 dwo_unit of the TU itself. */
6406 dwo_file
= cu
->dwo_unit
->dwo_file
;
6408 /* Ok, this is the first time we're reading this TU. */
6409 if (dwo_file
->tus
== NULL
)
6411 find_dwo_entry
.signature
= sig
;
6412 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6414 if (dwo_entry
== NULL
)
6417 /* If the global table doesn't have an entry for this TU, add one. */
6418 if (sig_entry
== NULL
)
6419 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6421 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6422 sig_entry
->per_cu
.tu_read
= 1;
6426 /* Subroutine of lookup_signatured_type.
6427 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6428 then try the DWP file. If the TU stub (skeleton) has been removed then
6429 it won't be in .gdb_index. */
6431 static struct signatured_type
*
6432 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6434 struct dwarf2_per_objfile
*dwarf2_per_objfile
6435 = cu
->per_cu
->dwarf2_per_objfile
;
6436 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6437 struct dwo_unit
*dwo_entry
;
6438 struct signatured_type find_sig_entry
, *sig_entry
;
6441 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6442 gdb_assert (dwp_file
!= NULL
);
6444 /* If TU skeletons have been removed then we may not have read in any
6446 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6447 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6449 find_sig_entry
.signature
= sig
;
6450 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6451 &find_sig_entry
, INSERT
);
6452 sig_entry
= (struct signatured_type
*) *slot
;
6454 /* Have we already tried to read this TU?
6455 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6456 needn't exist in the global table yet). */
6457 if (sig_entry
!= NULL
)
6460 if (dwp_file
->tus
== NULL
)
6462 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6463 sig
, 1 /* is_debug_types */);
6464 if (dwo_entry
== NULL
)
6467 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6468 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6473 /* Lookup a signature based type for DW_FORM_ref_sig8.
6474 Returns NULL if signature SIG is not present in the table.
6475 It is up to the caller to complain about this. */
6477 static struct signatured_type
*
6478 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6480 struct dwarf2_per_objfile
*dwarf2_per_objfile
6481 = cu
->per_cu
->dwarf2_per_objfile
;
6484 && dwarf2_per_objfile
->using_index
)
6486 /* We're in a DWO/DWP file, and we're using .gdb_index.
6487 These cases require special processing. */
6488 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6489 return lookup_dwo_signatured_type (cu
, sig
);
6491 return lookup_dwp_signatured_type (cu
, sig
);
6495 struct signatured_type find_entry
, *entry
;
6497 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6499 find_entry
.signature
= sig
;
6500 entry
= ((struct signatured_type
*)
6501 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6507 /* Low level DIE reading support. */
6509 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6512 init_cu_die_reader (struct die_reader_specs
*reader
,
6513 struct dwarf2_cu
*cu
,
6514 struct dwarf2_section_info
*section
,
6515 struct dwo_file
*dwo_file
,
6516 struct abbrev_table
*abbrev_table
)
6518 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6519 reader
->abfd
= section
->get_bfd_owner ();
6521 reader
->dwo_file
= dwo_file
;
6522 reader
->die_section
= section
;
6523 reader
->buffer
= section
->buffer
;
6524 reader
->buffer_end
= section
->buffer
+ section
->size
;
6525 reader
->abbrev_table
= abbrev_table
;
6528 /* Subroutine of cutu_reader to simplify it.
6529 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6530 There's just a lot of work to do, and cutu_reader is big enough
6533 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6534 from it to the DIE in the DWO. If NULL we are skipping the stub.
6535 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6536 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6537 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6538 STUB_COMP_DIR may be non-NULL.
6539 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6540 are filled in with the info of the DIE from the DWO file.
6541 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6542 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6543 kept around for at least as long as *RESULT_READER.
6545 The result is non-zero if a valid (non-dummy) DIE was found. */
6548 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6549 struct dwo_unit
*dwo_unit
,
6550 struct die_info
*stub_comp_unit_die
,
6551 const char *stub_comp_dir
,
6552 struct die_reader_specs
*result_reader
,
6553 const gdb_byte
**result_info_ptr
,
6554 struct die_info
**result_comp_unit_die
,
6555 abbrev_table_up
*result_dwo_abbrev_table
)
6557 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6558 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6559 struct dwarf2_cu
*cu
= this_cu
->cu
;
6561 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6562 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6563 int i
,num_extra_attrs
;
6564 struct dwarf2_section_info
*dwo_abbrev_section
;
6565 struct die_info
*comp_unit_die
;
6567 /* At most one of these may be provided. */
6568 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6570 /* These attributes aren't processed until later:
6571 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6572 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6573 referenced later. However, these attributes are found in the stub
6574 which we won't have later. In order to not impose this complication
6575 on the rest of the code, we read them here and copy them to the
6584 if (stub_comp_unit_die
!= NULL
)
6586 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6588 if (! this_cu
->is_debug_types
)
6589 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6590 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6591 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6592 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6593 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6595 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6597 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6598 here (if needed). We need the value before we can process
6600 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6602 else if (stub_comp_dir
!= NULL
)
6604 /* Reconstruct the comp_dir attribute to simplify the code below. */
6605 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6606 comp_dir
->name
= DW_AT_comp_dir
;
6607 comp_dir
->form
= DW_FORM_string
;
6608 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6609 DW_STRING (comp_dir
) = stub_comp_dir
;
6612 /* Set up for reading the DWO CU/TU. */
6613 cu
->dwo_unit
= dwo_unit
;
6614 dwarf2_section_info
*section
= dwo_unit
->section
;
6615 section
->read (objfile
);
6616 abfd
= section
->get_bfd_owner ();
6617 begin_info_ptr
= info_ptr
= (section
->buffer
6618 + to_underlying (dwo_unit
->sect_off
));
6619 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6621 if (this_cu
->is_debug_types
)
6623 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6625 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6626 &cu
->header
, section
,
6628 info_ptr
, rcuh_kind::TYPE
);
6629 /* This is not an assert because it can be caused by bad debug info. */
6630 if (sig_type
->signature
!= cu
->header
.signature
)
6632 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6633 " TU at offset %s [in module %s]"),
6634 hex_string (sig_type
->signature
),
6635 hex_string (cu
->header
.signature
),
6636 sect_offset_str (dwo_unit
->sect_off
),
6637 bfd_get_filename (abfd
));
6639 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6640 /* For DWOs coming from DWP files, we don't know the CU length
6641 nor the type's offset in the TU until now. */
6642 dwo_unit
->length
= cu
->header
.get_length ();
6643 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6645 /* Establish the type offset that can be used to lookup the type.
6646 For DWO files, we don't know it until now. */
6647 sig_type
->type_offset_in_section
6648 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6652 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6653 &cu
->header
, section
,
6655 info_ptr
, rcuh_kind::COMPILE
);
6656 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6657 /* For DWOs coming from DWP files, we don't know the CU length
6659 dwo_unit
->length
= cu
->header
.get_length ();
6662 *result_dwo_abbrev_table
6663 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6664 cu
->header
.abbrev_sect_off
);
6665 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6666 result_dwo_abbrev_table
->get ());
6668 /* Read in the die, but leave space to copy over the attributes
6669 from the stub. This has the benefit of simplifying the rest of
6670 the code - all the work to maintain the illusion of a single
6671 DW_TAG_{compile,type}_unit DIE is done here. */
6672 num_extra_attrs
= ((stmt_list
!= NULL
)
6676 + (comp_dir
!= NULL
));
6677 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6680 /* Copy over the attributes from the stub to the DIE we just read in. */
6681 comp_unit_die
= *result_comp_unit_die
;
6682 i
= comp_unit_die
->num_attrs
;
6683 if (stmt_list
!= NULL
)
6684 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6686 comp_unit_die
->attrs
[i
++] = *low_pc
;
6687 if (high_pc
!= NULL
)
6688 comp_unit_die
->attrs
[i
++] = *high_pc
;
6690 comp_unit_die
->attrs
[i
++] = *ranges
;
6691 if (comp_dir
!= NULL
)
6692 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6693 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6695 if (dwarf_die_debug
)
6697 fprintf_unfiltered (gdb_stdlog
,
6698 "Read die from %s@0x%x of %s:\n",
6699 section
->get_name (),
6700 (unsigned) (begin_info_ptr
- section
->buffer
),
6701 bfd_get_filename (abfd
));
6702 dump_die (comp_unit_die
, dwarf_die_debug
);
6705 /* Skip dummy compilation units. */
6706 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6707 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6710 *result_info_ptr
= info_ptr
;
6714 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6715 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6716 signature is part of the header. */
6717 static gdb::optional
<ULONGEST
>
6718 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6720 if (cu
->header
.version
>= 5)
6721 return cu
->header
.signature
;
6722 struct attribute
*attr
;
6723 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6724 if (attr
== nullptr)
6725 return gdb::optional
<ULONGEST
> ();
6726 return DW_UNSND (attr
);
6729 /* Subroutine of cutu_reader to simplify it.
6730 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6731 Returns NULL if the specified DWO unit cannot be found. */
6733 static struct dwo_unit
*
6734 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6735 struct die_info
*comp_unit_die
,
6736 const char *dwo_name
)
6738 struct dwarf2_cu
*cu
= this_cu
->cu
;
6739 struct dwo_unit
*dwo_unit
;
6740 const char *comp_dir
;
6742 gdb_assert (cu
!= NULL
);
6744 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6745 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6746 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6748 if (this_cu
->is_debug_types
)
6750 struct signatured_type
*sig_type
;
6752 /* Since this_cu is the first member of struct signatured_type,
6753 we can go from a pointer to one to a pointer to the other. */
6754 sig_type
= (struct signatured_type
*) this_cu
;
6755 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6759 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6760 if (!signature
.has_value ())
6761 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6763 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6764 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6771 /* Subroutine of cutu_reader to simplify it.
6772 See it for a description of the parameters.
6773 Read a TU directly from a DWO file, bypassing the stub. */
6776 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6777 int use_existing_cu
)
6779 struct signatured_type
*sig_type
;
6781 /* Verify we can do the following downcast, and that we have the
6783 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6784 sig_type
= (struct signatured_type
*) this_cu
;
6785 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6787 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6789 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6790 /* There's no need to do the rereading_dwo_cu handling that
6791 cutu_reader does since we don't read the stub. */
6795 /* If !use_existing_cu, this_cu->cu must be NULL. */
6796 gdb_assert (this_cu
->cu
== NULL
);
6797 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6800 /* A future optimization, if needed, would be to use an existing
6801 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6802 could share abbrev tables. */
6804 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6805 NULL
/* stub_comp_unit_die */,
6806 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6809 &m_dwo_abbrev_table
) == 0)
6816 /* Initialize a CU (or TU) and read its DIEs.
6817 If the CU defers to a DWO file, read the DWO file as well.
6819 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6820 Otherwise the table specified in the comp unit header is read in and used.
6821 This is an optimization for when we already have the abbrev table.
6823 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6824 Otherwise, a new CU is allocated with xmalloc. */
6826 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6827 struct abbrev_table
*abbrev_table
,
6828 int use_existing_cu
,
6830 : die_reader_specs
{},
6833 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6834 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6835 struct dwarf2_section_info
*section
= this_cu
->section
;
6836 bfd
*abfd
= section
->get_bfd_owner ();
6837 struct dwarf2_cu
*cu
;
6838 const gdb_byte
*begin_info_ptr
;
6839 struct signatured_type
*sig_type
= NULL
;
6840 struct dwarf2_section_info
*abbrev_section
;
6841 /* Non-zero if CU currently points to a DWO file and we need to
6842 reread it. When this happens we need to reread the skeleton die
6843 before we can reread the DWO file (this only applies to CUs, not TUs). */
6844 int rereading_dwo_cu
= 0;
6846 if (dwarf_die_debug
)
6847 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6848 this_cu
->is_debug_types
? "type" : "comp",
6849 sect_offset_str (this_cu
->sect_off
));
6851 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6852 file (instead of going through the stub), short-circuit all of this. */
6853 if (this_cu
->reading_dwo_directly
)
6855 /* Narrow down the scope of possibilities to have to understand. */
6856 gdb_assert (this_cu
->is_debug_types
);
6857 gdb_assert (abbrev_table
== NULL
);
6858 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6862 /* This is cheap if the section is already read in. */
6863 section
->read (objfile
);
6865 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6867 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6869 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6872 /* If this CU is from a DWO file we need to start over, we need to
6873 refetch the attributes from the skeleton CU.
6874 This could be optimized by retrieving those attributes from when we
6875 were here the first time: the previous comp_unit_die was stored in
6876 comp_unit_obstack. But there's no data yet that we need this
6878 if (cu
->dwo_unit
!= NULL
)
6879 rereading_dwo_cu
= 1;
6883 /* If !use_existing_cu, this_cu->cu must be NULL. */
6884 gdb_assert (this_cu
->cu
== NULL
);
6885 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6886 cu
= m_new_cu
.get ();
6889 /* Get the header. */
6890 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6892 /* We already have the header, there's no need to read it in again. */
6893 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6897 if (this_cu
->is_debug_types
)
6899 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6900 &cu
->header
, section
,
6901 abbrev_section
, info_ptr
,
6904 /* Since per_cu is the first member of struct signatured_type,
6905 we can go from a pointer to one to a pointer to the other. */
6906 sig_type
= (struct signatured_type
*) this_cu
;
6907 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6908 gdb_assert (sig_type
->type_offset_in_tu
6909 == cu
->header
.type_cu_offset_in_tu
);
6910 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6912 /* LENGTH has not been set yet for type units if we're
6913 using .gdb_index. */
6914 this_cu
->length
= cu
->header
.get_length ();
6916 /* Establish the type offset that can be used to lookup the type. */
6917 sig_type
->type_offset_in_section
=
6918 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6920 this_cu
->dwarf_version
= cu
->header
.version
;
6924 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6925 &cu
->header
, section
,
6928 rcuh_kind::COMPILE
);
6930 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6931 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
6932 this_cu
->dwarf_version
= cu
->header
.version
;
6936 /* Skip dummy compilation units. */
6937 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6938 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6944 /* If we don't have them yet, read the abbrevs for this compilation unit.
6945 And if we need to read them now, make sure they're freed when we're
6947 if (abbrev_table
!= NULL
)
6948 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6951 m_abbrev_table_holder
6952 = abbrev_table::read (objfile
, abbrev_section
,
6953 cu
->header
.abbrev_sect_off
);
6954 abbrev_table
= m_abbrev_table_holder
.get ();
6957 /* Read the top level CU/TU die. */
6958 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
6959 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
6961 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
6967 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6968 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
6969 table from the DWO file and pass the ownership over to us. It will be
6970 referenced from READER, so we must make sure to free it after we're done
6973 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6974 DWO CU, that this test will fail (the attribute will not be present). */
6975 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6976 if (dwo_name
!= nullptr)
6978 struct dwo_unit
*dwo_unit
;
6979 struct die_info
*dwo_comp_unit_die
;
6981 if (comp_unit_die
->has_children
)
6983 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
6984 " has children (offset %s) [in module %s]"),
6985 sect_offset_str (this_cu
->sect_off
),
6986 bfd_get_filename (abfd
));
6988 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
6989 if (dwo_unit
!= NULL
)
6991 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6992 comp_unit_die
, NULL
,
6995 &m_dwo_abbrev_table
) == 0)
7001 comp_unit_die
= dwo_comp_unit_die
;
7005 /* Yikes, we couldn't find the rest of the DIE, we only have
7006 the stub. A complaint has already been logged. There's
7007 not much more we can do except pass on the stub DIE to
7008 die_reader_func. We don't want to throw an error on bad
7015 cutu_reader::keep ()
7017 /* Done, clean up. */
7018 gdb_assert (!dummy_p
);
7019 if (m_new_cu
!= NULL
)
7021 struct dwarf2_per_objfile
*dwarf2_per_objfile
7022 = m_this_cu
->dwarf2_per_objfile
;
7023 /* Link this CU into read_in_chain. */
7024 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7025 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7026 /* The chain owns it now. */
7027 m_new_cu
.release ();
7031 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7032 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7033 assumed to have already done the lookup to find the DWO file).
7035 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7036 THIS_CU->is_debug_types, but nothing else.
7038 We fill in THIS_CU->length.
7040 THIS_CU->cu is always freed when done.
7041 This is done in order to not leave THIS_CU->cu in a state where we have
7042 to care whether it refers to the "main" CU or the DWO CU.
7044 When parent_cu is passed, it is used to provide a default value for
7045 str_offsets_base and addr_base from the parent. */
7047 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7048 struct dwarf2_cu
*parent_cu
,
7049 struct dwo_file
*dwo_file
)
7050 : die_reader_specs
{},
7053 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7054 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7055 struct dwarf2_section_info
*section
= this_cu
->section
;
7056 bfd
*abfd
= section
->get_bfd_owner ();
7057 struct dwarf2_section_info
*abbrev_section
;
7058 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7060 if (dwarf_die_debug
)
7061 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7062 this_cu
->is_debug_types
? "type" : "comp",
7063 sect_offset_str (this_cu
->sect_off
));
7065 gdb_assert (this_cu
->cu
== NULL
);
7067 abbrev_section
= (dwo_file
!= NULL
7068 ? &dwo_file
->sections
.abbrev
7069 : get_abbrev_section_for_cu (this_cu
));
7071 /* This is cheap if the section is already read in. */
7072 section
->read (objfile
);
7074 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7076 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7077 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7078 &m_new_cu
->header
, section
,
7079 abbrev_section
, info_ptr
,
7080 (this_cu
->is_debug_types
7082 : rcuh_kind::COMPILE
));
7084 if (parent_cu
!= nullptr)
7086 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7087 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7089 this_cu
->length
= m_new_cu
->header
.get_length ();
7091 /* Skip dummy compilation units. */
7092 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7093 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7099 m_abbrev_table_holder
7100 = abbrev_table::read (objfile
, abbrev_section
,
7101 m_new_cu
->header
.abbrev_sect_off
);
7103 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7104 m_abbrev_table_holder
.get ());
7105 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7109 /* Type Unit Groups.
7111 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7112 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7113 so that all types coming from the same compilation (.o file) are grouped
7114 together. A future step could be to put the types in the same symtab as
7115 the CU the types ultimately came from. */
7118 hash_type_unit_group (const void *item
)
7120 const struct type_unit_group
*tu_group
7121 = (const struct type_unit_group
*) item
;
7123 return hash_stmt_list_entry (&tu_group
->hash
);
7127 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7129 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7130 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7132 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7135 /* Allocate a hash table for type unit groups. */
7138 allocate_type_unit_groups_table ()
7140 return htab_up (htab_create_alloc (3,
7141 hash_type_unit_group
,
7143 NULL
, xcalloc
, xfree
));
7146 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7147 partial symtabs. We combine several TUs per psymtab to not let the size
7148 of any one psymtab grow too big. */
7149 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7150 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7152 /* Helper routine for get_type_unit_group.
7153 Create the type_unit_group object used to hold one or more TUs. */
7155 static struct type_unit_group
*
7156 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7158 struct dwarf2_per_objfile
*dwarf2_per_objfile
7159 = cu
->per_cu
->dwarf2_per_objfile
;
7160 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7161 struct dwarf2_per_cu_data
*per_cu
;
7162 struct type_unit_group
*tu_group
;
7164 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7165 struct type_unit_group
);
7166 per_cu
= &tu_group
->per_cu
;
7167 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7169 if (dwarf2_per_objfile
->using_index
)
7171 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7172 struct dwarf2_per_cu_quick_data
);
7176 unsigned int line_offset
= to_underlying (line_offset_struct
);
7177 dwarf2_psymtab
*pst
;
7180 /* Give the symtab a useful name for debug purposes. */
7181 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7182 name
= string_printf ("<type_units_%d>",
7183 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7185 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7187 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7188 pst
->anonymous
= true;
7191 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7192 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7197 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7198 STMT_LIST is a DW_AT_stmt_list attribute. */
7200 static struct type_unit_group
*
7201 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7203 struct dwarf2_per_objfile
*dwarf2_per_objfile
7204 = cu
->per_cu
->dwarf2_per_objfile
;
7205 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7206 struct type_unit_group
*tu_group
;
7208 unsigned int line_offset
;
7209 struct type_unit_group type_unit_group_for_lookup
;
7211 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7212 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7214 /* Do we need to create a new group, or can we use an existing one? */
7218 line_offset
= DW_UNSND (stmt_list
);
7219 ++tu_stats
->nr_symtab_sharers
;
7223 /* Ugh, no stmt_list. Rare, but we have to handle it.
7224 We can do various things here like create one group per TU or
7225 spread them over multiple groups to split up the expansion work.
7226 To avoid worst case scenarios (too many groups or too large groups)
7227 we, umm, group them in bunches. */
7228 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7229 | (tu_stats
->nr_stmt_less_type_units
7230 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7231 ++tu_stats
->nr_stmt_less_type_units
;
7234 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7235 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7236 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7237 &type_unit_group_for_lookup
, INSERT
);
7240 tu_group
= (struct type_unit_group
*) *slot
;
7241 gdb_assert (tu_group
!= NULL
);
7245 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7246 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7248 ++tu_stats
->nr_symtabs
;
7254 /* Partial symbol tables. */
7256 /* Create a psymtab named NAME and assign it to PER_CU.
7258 The caller must fill in the following details:
7259 dirname, textlow, texthigh. */
7261 static dwarf2_psymtab
*
7262 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7264 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7265 dwarf2_psymtab
*pst
;
7267 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7269 pst
->psymtabs_addrmap_supported
= true;
7271 /* This is the glue that links PST into GDB's symbol API. */
7272 per_cu
->v
.psymtab
= pst
;
7277 /* DIE reader function for process_psymtab_comp_unit. */
7280 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7281 const gdb_byte
*info_ptr
,
7282 struct die_info
*comp_unit_die
,
7283 enum language pretend_language
)
7285 struct dwarf2_cu
*cu
= reader
->cu
;
7286 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7287 struct gdbarch
*gdbarch
= objfile
->arch ();
7288 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7290 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7291 dwarf2_psymtab
*pst
;
7292 enum pc_bounds_kind cu_bounds_kind
;
7293 const char *filename
;
7295 gdb_assert (! per_cu
->is_debug_types
);
7297 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7299 /* Allocate a new partial symbol table structure. */
7300 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7301 static const char artificial
[] = "<artificial>";
7302 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7303 if (filename
== NULL
)
7305 else if (strcmp (filename
, artificial
) == 0)
7307 debug_filename
.reset (concat (artificial
, "@",
7308 sect_offset_str (per_cu
->sect_off
),
7310 filename
= debug_filename
.get ();
7313 pst
= create_partial_symtab (per_cu
, filename
);
7315 /* This must be done before calling dwarf2_build_include_psymtabs. */
7316 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7318 baseaddr
= objfile
->text_section_offset ();
7320 dwarf2_find_base_address (comp_unit_die
, cu
);
7322 /* Possibly set the default values of LOWPC and HIGHPC from
7324 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7325 &best_highpc
, cu
, pst
);
7326 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7329 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7332 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7334 /* Store the contiguous range if it is not empty; it can be
7335 empty for CUs with no code. */
7336 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7340 /* Check if comp unit has_children.
7341 If so, read the rest of the partial symbols from this comp unit.
7342 If not, there's no more debug_info for this comp unit. */
7343 if (comp_unit_die
->has_children
)
7345 struct partial_die_info
*first_die
;
7346 CORE_ADDR lowpc
, highpc
;
7348 lowpc
= ((CORE_ADDR
) -1);
7349 highpc
= ((CORE_ADDR
) 0);
7351 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7353 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7354 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7356 /* If we didn't find a lowpc, set it to highpc to avoid
7357 complaints from `maint check'. */
7358 if (lowpc
== ((CORE_ADDR
) -1))
7361 /* If the compilation unit didn't have an explicit address range,
7362 then use the information extracted from its child dies. */
7363 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7366 best_highpc
= highpc
;
7369 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7370 best_lowpc
+ baseaddr
)
7372 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7373 best_highpc
+ baseaddr
)
7376 end_psymtab_common (objfile
, pst
);
7378 if (!cu
->per_cu
->imported_symtabs_empty ())
7381 int len
= cu
->per_cu
->imported_symtabs_size ();
7383 /* Fill in 'dependencies' here; we fill in 'users' in a
7385 pst
->number_of_dependencies
= len
;
7387 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7388 for (i
= 0; i
< len
; ++i
)
7390 pst
->dependencies
[i
]
7391 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7394 cu
->per_cu
->imported_symtabs_free ();
7397 /* Get the list of files included in the current compilation unit,
7398 and build a psymtab for each of them. */
7399 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7401 if (dwarf_read_debug
)
7402 fprintf_unfiltered (gdb_stdlog
,
7403 "Psymtab for %s unit @%s: %s - %s"
7404 ", %d global, %d static syms\n",
7405 per_cu
->is_debug_types
? "type" : "comp",
7406 sect_offset_str (per_cu
->sect_off
),
7407 paddress (gdbarch
, pst
->text_low (objfile
)),
7408 paddress (gdbarch
, pst
->text_high (objfile
)),
7409 pst
->n_global_syms
, pst
->n_static_syms
);
7412 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7413 Process compilation unit THIS_CU for a psymtab. */
7416 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7417 bool want_partial_unit
,
7418 enum language pretend_language
)
7420 /* If this compilation unit was already read in, free the
7421 cached copy in order to read it in again. This is
7422 necessary because we skipped some symbols when we first
7423 read in the compilation unit (see load_partial_dies).
7424 This problem could be avoided, but the benefit is unclear. */
7425 if (this_cu
->cu
!= NULL
)
7426 free_one_cached_comp_unit (this_cu
);
7428 cutu_reader
reader (this_cu
, NULL
, 0, false);
7430 switch (reader
.comp_unit_die
->tag
)
7432 case DW_TAG_compile_unit
:
7433 this_cu
->unit_type
= DW_UT_compile
;
7435 case DW_TAG_partial_unit
:
7436 this_cu
->unit_type
= DW_UT_partial
;
7446 else if (this_cu
->is_debug_types
)
7447 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7448 reader
.comp_unit_die
);
7449 else if (want_partial_unit
7450 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7451 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7452 reader
.comp_unit_die
,
7455 this_cu
->lang
= this_cu
->cu
->language
;
7457 /* Age out any secondary CUs. */
7458 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7461 /* Reader function for build_type_psymtabs. */
7464 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7465 const gdb_byte
*info_ptr
,
7466 struct die_info
*type_unit_die
)
7468 struct dwarf2_per_objfile
*dwarf2_per_objfile
7469 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7470 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7471 struct dwarf2_cu
*cu
= reader
->cu
;
7472 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7473 struct signatured_type
*sig_type
;
7474 struct type_unit_group
*tu_group
;
7475 struct attribute
*attr
;
7476 struct partial_die_info
*first_die
;
7477 CORE_ADDR lowpc
, highpc
;
7478 dwarf2_psymtab
*pst
;
7480 gdb_assert (per_cu
->is_debug_types
);
7481 sig_type
= (struct signatured_type
*) per_cu
;
7483 if (! type_unit_die
->has_children
)
7486 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7487 tu_group
= get_type_unit_group (cu
, attr
);
7489 if (tu_group
->tus
== nullptr)
7490 tu_group
->tus
= new std::vector
<signatured_type
*>;
7491 tu_group
->tus
->push_back (sig_type
);
7493 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7494 pst
= create_partial_symtab (per_cu
, "");
7495 pst
->anonymous
= true;
7497 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7499 lowpc
= (CORE_ADDR
) -1;
7500 highpc
= (CORE_ADDR
) 0;
7501 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7503 end_psymtab_common (objfile
, pst
);
7506 /* Struct used to sort TUs by their abbreviation table offset. */
7508 struct tu_abbrev_offset
7510 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7511 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7514 signatured_type
*sig_type
;
7515 sect_offset abbrev_offset
;
7518 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7521 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7522 const struct tu_abbrev_offset
&b
)
7524 return a
.abbrev_offset
< b
.abbrev_offset
;
7527 /* Efficiently read all the type units.
7528 This does the bulk of the work for build_type_psymtabs.
7530 The efficiency is because we sort TUs by the abbrev table they use and
7531 only read each abbrev table once. In one program there are 200K TUs
7532 sharing 8K abbrev tables.
7534 The main purpose of this function is to support building the
7535 dwarf2_per_objfile->type_unit_groups table.
7536 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7537 can collapse the search space by grouping them by stmt_list.
7538 The savings can be significant, in the same program from above the 200K TUs
7539 share 8K stmt_list tables.
7541 FUNC is expected to call get_type_unit_group, which will create the
7542 struct type_unit_group if necessary and add it to
7543 dwarf2_per_objfile->type_unit_groups. */
7546 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7548 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7549 abbrev_table_up abbrev_table
;
7550 sect_offset abbrev_offset
;
7552 /* It's up to the caller to not call us multiple times. */
7553 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7555 if (dwarf2_per_objfile
->all_type_units
.empty ())
7558 /* TUs typically share abbrev tables, and there can be way more TUs than
7559 abbrev tables. Sort by abbrev table to reduce the number of times we
7560 read each abbrev table in.
7561 Alternatives are to punt or to maintain a cache of abbrev tables.
7562 This is simpler and efficient enough for now.
7564 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7565 symtab to use). Typically TUs with the same abbrev offset have the same
7566 stmt_list value too so in practice this should work well.
7568 The basic algorithm here is:
7570 sort TUs by abbrev table
7571 for each TU with same abbrev table:
7572 read abbrev table if first user
7573 read TU top level DIE
7574 [IWBN if DWO skeletons had DW_AT_stmt_list]
7577 if (dwarf_read_debug
)
7578 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7580 /* Sort in a separate table to maintain the order of all_type_units
7581 for .gdb_index: TU indices directly index all_type_units. */
7582 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7583 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7585 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7586 sorted_by_abbrev
.emplace_back
7587 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7588 sig_type
->per_cu
.section
,
7589 sig_type
->per_cu
.sect_off
));
7591 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7592 sort_tu_by_abbrev_offset
);
7594 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7596 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7598 /* Switch to the next abbrev table if necessary. */
7599 if (abbrev_table
== NULL
7600 || tu
.abbrev_offset
!= abbrev_offset
)
7602 abbrev_offset
= tu
.abbrev_offset
;
7604 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7605 &dwarf2_per_objfile
->abbrev
,
7607 ++tu_stats
->nr_uniq_abbrev_tables
;
7610 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7612 if (!reader
.dummy_p
)
7613 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7614 reader
.comp_unit_die
);
7618 /* Print collected type unit statistics. */
7621 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7623 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7625 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7626 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7627 dwarf2_per_objfile
->all_type_units
.size ());
7628 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7629 tu_stats
->nr_uniq_abbrev_tables
);
7630 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7631 tu_stats
->nr_symtabs
);
7632 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7633 tu_stats
->nr_symtab_sharers
);
7634 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7635 tu_stats
->nr_stmt_less_type_units
);
7636 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7637 tu_stats
->nr_all_type_units_reallocs
);
7640 /* Traversal function for build_type_psymtabs. */
7643 build_type_psymtab_dependencies (void **slot
, void *info
)
7645 struct dwarf2_per_objfile
*dwarf2_per_objfile
7646 = (struct dwarf2_per_objfile
*) info
;
7647 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7648 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7649 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7650 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7651 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7654 gdb_assert (len
> 0);
7655 gdb_assert (per_cu
->type_unit_group_p ());
7657 pst
->number_of_dependencies
= len
;
7658 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7659 for (i
= 0; i
< len
; ++i
)
7661 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7662 gdb_assert (iter
->per_cu
.is_debug_types
);
7663 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7664 iter
->type_unit_group
= tu_group
;
7667 delete tu_group
->tus
;
7668 tu_group
->tus
= nullptr;
7673 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7674 Build partial symbol tables for the .debug_types comp-units. */
7677 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7679 if (! create_all_type_units (dwarf2_per_objfile
))
7682 build_type_psymtabs_1 (dwarf2_per_objfile
);
7685 /* Traversal function for process_skeletonless_type_unit.
7686 Read a TU in a DWO file and build partial symbols for it. */
7689 process_skeletonless_type_unit (void **slot
, void *info
)
7691 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7692 struct dwarf2_per_objfile
*dwarf2_per_objfile
7693 = (struct dwarf2_per_objfile
*) info
;
7694 struct signatured_type find_entry
, *entry
;
7696 /* If this TU doesn't exist in the global table, add it and read it in. */
7698 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7699 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7701 find_entry
.signature
= dwo_unit
->signature
;
7702 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7703 &find_entry
, INSERT
);
7704 /* If we've already seen this type there's nothing to do. What's happening
7705 is we're doing our own version of comdat-folding here. */
7709 /* This does the job that create_all_type_units would have done for
7711 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7712 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7715 /* This does the job that build_type_psymtabs_1 would have done. */
7716 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7717 if (!reader
.dummy_p
)
7718 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7719 reader
.comp_unit_die
);
7724 /* Traversal function for process_skeletonless_type_units. */
7727 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7729 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7731 if (dwo_file
->tus
!= NULL
)
7732 htab_traverse_noresize (dwo_file
->tus
.get (),
7733 process_skeletonless_type_unit
, info
);
7738 /* Scan all TUs of DWO files, verifying we've processed them.
7739 This is needed in case a TU was emitted without its skeleton.
7740 Note: This can't be done until we know what all the DWO files are. */
7743 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7745 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7746 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7747 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7749 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7750 process_dwo_file_for_skeletonless_type_units
,
7751 dwarf2_per_objfile
);
7755 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7758 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7760 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7762 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7767 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7769 /* Set the 'user' field only if it is not already set. */
7770 if (pst
->dependencies
[j
]->user
== NULL
)
7771 pst
->dependencies
[j
]->user
= pst
;
7776 /* Build the partial symbol table by doing a quick pass through the
7777 .debug_info and .debug_abbrev sections. */
7780 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7782 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7784 if (dwarf_read_debug
)
7786 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7787 objfile_name (objfile
));
7790 scoped_restore restore_reading_psyms
7791 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7794 dwarf2_per_objfile
->info
.read (objfile
);
7796 /* Any cached compilation units will be linked by the per-objfile
7797 read_in_chain. Make sure to free them when we're done. */
7798 free_cached_comp_units
freer (dwarf2_per_objfile
);
7800 build_type_psymtabs (dwarf2_per_objfile
);
7802 create_all_comp_units (dwarf2_per_objfile
);
7804 /* Create a temporary address map on a temporary obstack. We later
7805 copy this to the final obstack. */
7806 auto_obstack temp_obstack
;
7808 scoped_restore save_psymtabs_addrmap
7809 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7810 addrmap_create_mutable (&temp_obstack
));
7812 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7814 if (per_cu
->v
.psymtab
!= NULL
)
7815 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7817 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7820 /* This has to wait until we read the CUs, we need the list of DWOs. */
7821 process_skeletonless_type_units (dwarf2_per_objfile
);
7823 /* Now that all TUs have been processed we can fill in the dependencies. */
7824 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7826 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7827 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7830 if (dwarf_read_debug
)
7831 print_tu_stats (dwarf2_per_objfile
);
7833 set_partial_user (dwarf2_per_objfile
);
7835 objfile
->partial_symtabs
->psymtabs_addrmap
7836 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7837 objfile
->partial_symtabs
->obstack ());
7838 /* At this point we want to keep the address map. */
7839 save_psymtabs_addrmap
.release ();
7841 if (dwarf_read_debug
)
7842 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7843 objfile_name (objfile
));
7846 /* Load the partial DIEs for a secondary CU into memory.
7847 This is also used when rereading a primary CU with load_all_dies. */
7850 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7852 cutu_reader
reader (this_cu
, NULL
, 1, false);
7854 if (!reader
.dummy_p
)
7856 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7859 /* Check if comp unit has_children.
7860 If so, read the rest of the partial symbols from this comp unit.
7861 If not, there's no more debug_info for this comp unit. */
7862 if (reader
.comp_unit_die
->has_children
)
7863 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7870 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7871 struct dwarf2_section_info
*section
,
7872 struct dwarf2_section_info
*abbrev_section
,
7873 unsigned int is_dwz
)
7875 const gdb_byte
*info_ptr
;
7876 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7878 if (dwarf_read_debug
)
7879 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7880 section
->get_name (),
7881 section
->get_file_name ());
7883 section
->read (objfile
);
7885 info_ptr
= section
->buffer
;
7887 while (info_ptr
< section
->buffer
+ section
->size
)
7889 struct dwarf2_per_cu_data
*this_cu
;
7891 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7893 comp_unit_head cu_header
;
7894 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7895 abbrev_section
, info_ptr
,
7896 rcuh_kind::COMPILE
);
7898 /* Save the compilation unit for later lookup. */
7899 if (cu_header
.unit_type
!= DW_UT_type
)
7901 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7902 struct dwarf2_per_cu_data
);
7903 memset (this_cu
, 0, sizeof (*this_cu
));
7907 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7908 struct signatured_type
);
7909 memset (sig_type
, 0, sizeof (*sig_type
));
7910 sig_type
->signature
= cu_header
.signature
;
7911 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7912 this_cu
= &sig_type
->per_cu
;
7914 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7915 this_cu
->sect_off
= sect_off
;
7916 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7917 this_cu
->is_dwz
= is_dwz
;
7918 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7919 this_cu
->section
= section
;
7921 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
7923 info_ptr
= info_ptr
+ this_cu
->length
;
7927 /* Create a list of all compilation units in OBJFILE.
7928 This is only done for -readnow and building partial symtabs. */
7931 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7933 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
7934 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
7935 &dwarf2_per_objfile
->abbrev
, 0);
7937 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
7939 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
7943 /* Process all loaded DIEs for compilation unit CU, starting at
7944 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7945 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7946 DW_AT_ranges). See the comments of add_partial_subprogram on how
7947 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7950 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7951 CORE_ADDR
*highpc
, int set_addrmap
,
7952 struct dwarf2_cu
*cu
)
7954 struct partial_die_info
*pdi
;
7956 /* Now, march along the PDI's, descending into ones which have
7957 interesting children but skipping the children of the other ones,
7958 until we reach the end of the compilation unit. */
7966 /* Anonymous namespaces or modules have no name but have interesting
7967 children, so we need to look at them. Ditto for anonymous
7970 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7971 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7972 || pdi
->tag
== DW_TAG_imported_unit
7973 || pdi
->tag
== DW_TAG_inlined_subroutine
)
7977 case DW_TAG_subprogram
:
7978 case DW_TAG_inlined_subroutine
:
7979 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7981 case DW_TAG_constant
:
7982 case DW_TAG_variable
:
7983 case DW_TAG_typedef
:
7984 case DW_TAG_union_type
:
7985 if (!pdi
->is_declaration
7986 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
7988 add_partial_symbol (pdi
, cu
);
7991 case DW_TAG_class_type
:
7992 case DW_TAG_interface_type
:
7993 case DW_TAG_structure_type
:
7994 if (!pdi
->is_declaration
)
7996 add_partial_symbol (pdi
, cu
);
7998 if ((cu
->language
== language_rust
7999 || cu
->language
== language_cplus
) && pdi
->has_children
)
8000 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8003 case DW_TAG_enumeration_type
:
8004 if (!pdi
->is_declaration
)
8005 add_partial_enumeration (pdi
, cu
);
8007 case DW_TAG_base_type
:
8008 case DW_TAG_subrange_type
:
8009 /* File scope base type definitions are added to the partial
8011 add_partial_symbol (pdi
, cu
);
8013 case DW_TAG_namespace
:
8014 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8017 if (!pdi
->is_declaration
)
8018 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8020 case DW_TAG_imported_unit
:
8022 struct dwarf2_per_cu_data
*per_cu
;
8024 /* For now we don't handle imported units in type units. */
8025 if (cu
->per_cu
->is_debug_types
)
8027 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8028 " supported in type units [in module %s]"),
8029 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8032 per_cu
= dwarf2_find_containing_comp_unit
8033 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8034 cu
->per_cu
->dwarf2_per_objfile
);
8036 /* Go read the partial unit, if needed. */
8037 if (per_cu
->v
.psymtab
== NULL
)
8038 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8040 cu
->per_cu
->imported_symtabs_push (per_cu
);
8043 case DW_TAG_imported_declaration
:
8044 add_partial_symbol (pdi
, cu
);
8051 /* If the die has a sibling, skip to the sibling. */
8053 pdi
= pdi
->die_sibling
;
8057 /* Functions used to compute the fully scoped name of a partial DIE.
8059 Normally, this is simple. For C++, the parent DIE's fully scoped
8060 name is concatenated with "::" and the partial DIE's name.
8061 Enumerators are an exception; they use the scope of their parent
8062 enumeration type, i.e. the name of the enumeration type is not
8063 prepended to the enumerator.
8065 There are two complexities. One is DW_AT_specification; in this
8066 case "parent" means the parent of the target of the specification,
8067 instead of the direct parent of the DIE. The other is compilers
8068 which do not emit DW_TAG_namespace; in this case we try to guess
8069 the fully qualified name of structure types from their members'
8070 linkage names. This must be done using the DIE's children rather
8071 than the children of any DW_AT_specification target. We only need
8072 to do this for structures at the top level, i.e. if the target of
8073 any DW_AT_specification (if any; otherwise the DIE itself) does not
8076 /* Compute the scope prefix associated with PDI's parent, in
8077 compilation unit CU. The result will be allocated on CU's
8078 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8079 field. NULL is returned if no prefix is necessary. */
8081 partial_die_parent_scope (struct partial_die_info
*pdi
,
8082 struct dwarf2_cu
*cu
)
8084 const char *grandparent_scope
;
8085 struct partial_die_info
*parent
, *real_pdi
;
8087 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8088 then this means the parent of the specification DIE. */
8091 while (real_pdi
->has_specification
)
8093 auto res
= find_partial_die (real_pdi
->spec_offset
,
8094 real_pdi
->spec_is_dwz
, cu
);
8099 parent
= real_pdi
->die_parent
;
8103 if (parent
->scope_set
)
8104 return parent
->scope
;
8108 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8110 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8111 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8112 Work around this problem here. */
8113 if (cu
->language
== language_cplus
8114 && parent
->tag
== DW_TAG_namespace
8115 && strcmp (parent
->name
, "::") == 0
8116 && grandparent_scope
== NULL
)
8118 parent
->scope
= NULL
;
8119 parent
->scope_set
= 1;
8123 /* Nested subroutines in Fortran get a prefix. */
8124 if (pdi
->tag
== DW_TAG_enumerator
)
8125 /* Enumerators should not get the name of the enumeration as a prefix. */
8126 parent
->scope
= grandparent_scope
;
8127 else if (parent
->tag
== DW_TAG_namespace
8128 || parent
->tag
== DW_TAG_module
8129 || parent
->tag
== DW_TAG_structure_type
8130 || parent
->tag
== DW_TAG_class_type
8131 || parent
->tag
== DW_TAG_interface_type
8132 || parent
->tag
== DW_TAG_union_type
8133 || parent
->tag
== DW_TAG_enumeration_type
8134 || (cu
->language
== language_fortran
8135 && parent
->tag
== DW_TAG_subprogram
8136 && pdi
->tag
== DW_TAG_subprogram
))
8138 if (grandparent_scope
== NULL
)
8139 parent
->scope
= parent
->name
;
8141 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8143 parent
->name
, 0, cu
);
8147 /* FIXME drow/2004-04-01: What should we be doing with
8148 function-local names? For partial symbols, we should probably be
8150 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8151 dwarf_tag_name (parent
->tag
),
8152 sect_offset_str (pdi
->sect_off
));
8153 parent
->scope
= grandparent_scope
;
8156 parent
->scope_set
= 1;
8157 return parent
->scope
;
8160 /* Return the fully scoped name associated with PDI, from compilation unit
8161 CU. The result will be allocated with malloc. */
8163 static gdb::unique_xmalloc_ptr
<char>
8164 partial_die_full_name (struct partial_die_info
*pdi
,
8165 struct dwarf2_cu
*cu
)
8167 const char *parent_scope
;
8169 /* If this is a template instantiation, we can not work out the
8170 template arguments from partial DIEs. So, unfortunately, we have
8171 to go through the full DIEs. At least any work we do building
8172 types here will be reused if full symbols are loaded later. */
8173 if (pdi
->has_template_arguments
)
8177 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8179 struct die_info
*die
;
8180 struct attribute attr
;
8181 struct dwarf2_cu
*ref_cu
= cu
;
8183 /* DW_FORM_ref_addr is using section offset. */
8184 attr
.name
= (enum dwarf_attribute
) 0;
8185 attr
.form
= DW_FORM_ref_addr
;
8186 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8187 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8189 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8193 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8194 if (parent_scope
== NULL
)
8197 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8202 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8204 struct dwarf2_per_objfile
*dwarf2_per_objfile
8205 = cu
->per_cu
->dwarf2_per_objfile
;
8206 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8207 struct gdbarch
*gdbarch
= objfile
->arch ();
8209 const char *actual_name
= NULL
;
8212 baseaddr
= objfile
->text_section_offset ();
8214 gdb::unique_xmalloc_ptr
<char> built_actual_name
8215 = partial_die_full_name (pdi
, cu
);
8216 if (built_actual_name
!= NULL
)
8217 actual_name
= built_actual_name
.get ();
8219 if (actual_name
== NULL
)
8220 actual_name
= pdi
->name
;
8222 partial_symbol psymbol
;
8223 memset (&psymbol
, 0, sizeof (psymbol
));
8224 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8225 psymbol
.ginfo
.section
= -1;
8227 /* The code below indicates that the psymbol should be installed by
8229 gdb::optional
<psymbol_placement
> where
;
8233 case DW_TAG_inlined_subroutine
:
8234 case DW_TAG_subprogram
:
8235 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8237 if (pdi
->is_external
8238 || cu
->language
== language_ada
8239 || (cu
->language
== language_fortran
8240 && pdi
->die_parent
!= NULL
8241 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8243 /* Normally, only "external" DIEs are part of the global scope.
8244 But in Ada and Fortran, we want to be able to access nested
8245 procedures globally. So all Ada and Fortran subprograms are
8246 stored in the global scope. */
8247 where
= psymbol_placement::GLOBAL
;
8250 where
= psymbol_placement::STATIC
;
8252 psymbol
.domain
= VAR_DOMAIN
;
8253 psymbol
.aclass
= LOC_BLOCK
;
8254 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8255 psymbol
.ginfo
.value
.address
= addr
;
8257 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8258 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8260 case DW_TAG_constant
:
8261 psymbol
.domain
= VAR_DOMAIN
;
8262 psymbol
.aclass
= LOC_STATIC
;
8263 where
= (pdi
->is_external
8264 ? psymbol_placement::GLOBAL
8265 : psymbol_placement::STATIC
);
8267 case DW_TAG_variable
:
8269 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8273 && !dwarf2_per_objfile
->has_section_at_zero
)
8275 /* A global or static variable may also have been stripped
8276 out by the linker if unused, in which case its address
8277 will be nullified; do not add such variables into partial
8278 symbol table then. */
8280 else if (pdi
->is_external
)
8283 Don't enter into the minimal symbol tables as there is
8284 a minimal symbol table entry from the ELF symbols already.
8285 Enter into partial symbol table if it has a location
8286 descriptor or a type.
8287 If the location descriptor is missing, new_symbol will create
8288 a LOC_UNRESOLVED symbol, the address of the variable will then
8289 be determined from the minimal symbol table whenever the variable
8291 The address for the partial symbol table entry is not
8292 used by GDB, but it comes in handy for debugging partial symbol
8295 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8297 psymbol
.domain
= VAR_DOMAIN
;
8298 psymbol
.aclass
= LOC_STATIC
;
8299 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8300 psymbol
.ginfo
.value
.address
= addr
;
8301 where
= psymbol_placement::GLOBAL
;
8306 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8308 /* Static Variable. Skip symbols whose value we cannot know (those
8309 without location descriptors or constant values). */
8310 if (!has_loc
&& !pdi
->has_const_value
)
8313 psymbol
.domain
= VAR_DOMAIN
;
8314 psymbol
.aclass
= LOC_STATIC
;
8315 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8317 psymbol
.ginfo
.value
.address
= addr
;
8318 where
= psymbol_placement::STATIC
;
8321 case DW_TAG_typedef
:
8322 case DW_TAG_base_type
:
8323 case DW_TAG_subrange_type
:
8324 psymbol
.domain
= VAR_DOMAIN
;
8325 psymbol
.aclass
= LOC_TYPEDEF
;
8326 where
= psymbol_placement::STATIC
;
8328 case DW_TAG_imported_declaration
:
8329 case DW_TAG_namespace
:
8330 psymbol
.domain
= VAR_DOMAIN
;
8331 psymbol
.aclass
= LOC_TYPEDEF
;
8332 where
= psymbol_placement::GLOBAL
;
8335 /* With Fortran 77 there might be a "BLOCK DATA" module
8336 available without any name. If so, we skip the module as it
8337 doesn't bring any value. */
8338 if (actual_name
!= nullptr)
8340 psymbol
.domain
= MODULE_DOMAIN
;
8341 psymbol
.aclass
= LOC_TYPEDEF
;
8342 where
= psymbol_placement::GLOBAL
;
8345 case DW_TAG_class_type
:
8346 case DW_TAG_interface_type
:
8347 case DW_TAG_structure_type
:
8348 case DW_TAG_union_type
:
8349 case DW_TAG_enumeration_type
:
8350 /* Skip external references. The DWARF standard says in the section
8351 about "Structure, Union, and Class Type Entries": "An incomplete
8352 structure, union or class type is represented by a structure,
8353 union or class entry that does not have a byte size attribute
8354 and that has a DW_AT_declaration attribute." */
8355 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8358 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8359 static vs. global. */
8360 psymbol
.domain
= STRUCT_DOMAIN
;
8361 psymbol
.aclass
= LOC_TYPEDEF
;
8362 where
= (cu
->language
== language_cplus
8363 ? psymbol_placement::GLOBAL
8364 : psymbol_placement::STATIC
);
8366 case DW_TAG_enumerator
:
8367 psymbol
.domain
= VAR_DOMAIN
;
8368 psymbol
.aclass
= LOC_CONST
;
8369 where
= (cu
->language
== language_cplus
8370 ? psymbol_placement::GLOBAL
8371 : psymbol_placement::STATIC
);
8377 if (where
.has_value ())
8379 if (built_actual_name
!= nullptr)
8380 actual_name
= objfile
->intern (actual_name
);
8381 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8382 psymbol
.ginfo
.set_linkage_name (actual_name
);
8385 psymbol
.ginfo
.set_demangled_name (actual_name
,
8386 &objfile
->objfile_obstack
);
8387 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8389 add_psymbol_to_list (psymbol
, *where
, objfile
);
8393 /* Read a partial die corresponding to a namespace; also, add a symbol
8394 corresponding to that namespace to the symbol table. NAMESPACE is
8395 the name of the enclosing namespace. */
8398 add_partial_namespace (struct partial_die_info
*pdi
,
8399 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8400 int set_addrmap
, struct dwarf2_cu
*cu
)
8402 /* Add a symbol for the namespace. */
8404 add_partial_symbol (pdi
, cu
);
8406 /* Now scan partial symbols in that namespace. */
8408 if (pdi
->has_children
)
8409 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8412 /* Read a partial die corresponding to a Fortran module. */
8415 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8416 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8418 /* Add a symbol for the namespace. */
8420 add_partial_symbol (pdi
, cu
);
8422 /* Now scan partial symbols in that module. */
8424 if (pdi
->has_children
)
8425 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8428 /* Read a partial die corresponding to a subprogram or an inlined
8429 subprogram and create a partial symbol for that subprogram.
8430 When the CU language allows it, this routine also defines a partial
8431 symbol for each nested subprogram that this subprogram contains.
8432 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8433 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8435 PDI may also be a lexical block, in which case we simply search
8436 recursively for subprograms defined inside that lexical block.
8437 Again, this is only performed when the CU language allows this
8438 type of definitions. */
8441 add_partial_subprogram (struct partial_die_info
*pdi
,
8442 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8443 int set_addrmap
, struct dwarf2_cu
*cu
)
8445 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8447 if (pdi
->has_pc_info
)
8449 if (pdi
->lowpc
< *lowpc
)
8450 *lowpc
= pdi
->lowpc
;
8451 if (pdi
->highpc
> *highpc
)
8452 *highpc
= pdi
->highpc
;
8455 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8456 struct gdbarch
*gdbarch
= objfile
->arch ();
8458 CORE_ADDR this_highpc
;
8459 CORE_ADDR this_lowpc
;
8461 baseaddr
= objfile
->text_section_offset ();
8463 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8464 pdi
->lowpc
+ baseaddr
)
8467 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8468 pdi
->highpc
+ baseaddr
)
8470 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8471 this_lowpc
, this_highpc
- 1,
8472 cu
->per_cu
->v
.psymtab
);
8476 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8478 if (!pdi
->is_declaration
)
8479 /* Ignore subprogram DIEs that do not have a name, they are
8480 illegal. Do not emit a complaint at this point, we will
8481 do so when we convert this psymtab into a symtab. */
8483 add_partial_symbol (pdi
, cu
);
8487 if (! pdi
->has_children
)
8490 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8492 pdi
= pdi
->die_child
;
8496 if (pdi
->tag
== DW_TAG_subprogram
8497 || pdi
->tag
== DW_TAG_inlined_subroutine
8498 || pdi
->tag
== DW_TAG_lexical_block
)
8499 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8500 pdi
= pdi
->die_sibling
;
8505 /* Read a partial die corresponding to an enumeration type. */
8508 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8509 struct dwarf2_cu
*cu
)
8511 struct partial_die_info
*pdi
;
8513 if (enum_pdi
->name
!= NULL
)
8514 add_partial_symbol (enum_pdi
, cu
);
8516 pdi
= enum_pdi
->die_child
;
8519 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8520 complaint (_("malformed enumerator DIE ignored"));
8522 add_partial_symbol (pdi
, cu
);
8523 pdi
= pdi
->die_sibling
;
8527 /* Return the initial uleb128 in the die at INFO_PTR. */
8530 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8532 unsigned int bytes_read
;
8534 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8537 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8538 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8540 Return the corresponding abbrev, or NULL if the number is zero (indicating
8541 an empty DIE). In either case *BYTES_READ will be set to the length of
8542 the initial number. */
8544 static struct abbrev_info
*
8545 peek_die_abbrev (const die_reader_specs
&reader
,
8546 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8548 dwarf2_cu
*cu
= reader
.cu
;
8549 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8550 unsigned int abbrev_number
8551 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8553 if (abbrev_number
== 0)
8556 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8559 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8560 " at offset %s [in module %s]"),
8561 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8562 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8568 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8569 Returns a pointer to the end of a series of DIEs, terminated by an empty
8570 DIE. Any children of the skipped DIEs will also be skipped. */
8572 static const gdb_byte
*
8573 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8577 unsigned int bytes_read
;
8578 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8581 return info_ptr
+ bytes_read
;
8583 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8587 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8588 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8589 abbrev corresponding to that skipped uleb128 should be passed in
8590 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8593 static const gdb_byte
*
8594 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8595 struct abbrev_info
*abbrev
)
8597 unsigned int bytes_read
;
8598 struct attribute attr
;
8599 bfd
*abfd
= reader
->abfd
;
8600 struct dwarf2_cu
*cu
= reader
->cu
;
8601 const gdb_byte
*buffer
= reader
->buffer
;
8602 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8603 unsigned int form
, i
;
8605 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8607 /* The only abbrev we care about is DW_AT_sibling. */
8608 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8611 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8613 if (attr
.form
== DW_FORM_ref_addr
)
8614 complaint (_("ignoring absolute DW_AT_sibling"));
8617 sect_offset off
= attr
.get_ref_die_offset ();
8618 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8620 if (sibling_ptr
< info_ptr
)
8621 complaint (_("DW_AT_sibling points backwards"));
8622 else if (sibling_ptr
> reader
->buffer_end
)
8623 reader
->die_section
->overflow_complaint ();
8629 /* If it isn't DW_AT_sibling, skip this attribute. */
8630 form
= abbrev
->attrs
[i
].form
;
8634 case DW_FORM_ref_addr
:
8635 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8636 and later it is offset sized. */
8637 if (cu
->header
.version
== 2)
8638 info_ptr
+= cu
->header
.addr_size
;
8640 info_ptr
+= cu
->header
.offset_size
;
8642 case DW_FORM_GNU_ref_alt
:
8643 info_ptr
+= cu
->header
.offset_size
;
8646 info_ptr
+= cu
->header
.addr_size
;
8654 case DW_FORM_flag_present
:
8655 case DW_FORM_implicit_const
:
8672 case DW_FORM_ref_sig8
:
8675 case DW_FORM_data16
:
8678 case DW_FORM_string
:
8679 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8680 info_ptr
+= bytes_read
;
8682 case DW_FORM_sec_offset
:
8684 case DW_FORM_GNU_strp_alt
:
8685 info_ptr
+= cu
->header
.offset_size
;
8687 case DW_FORM_exprloc
:
8689 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8690 info_ptr
+= bytes_read
;
8692 case DW_FORM_block1
:
8693 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8695 case DW_FORM_block2
:
8696 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8698 case DW_FORM_block4
:
8699 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8705 case DW_FORM_ref_udata
:
8706 case DW_FORM_GNU_addr_index
:
8707 case DW_FORM_GNU_str_index
:
8708 case DW_FORM_rnglistx
:
8709 case DW_FORM_loclistx
:
8710 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8712 case DW_FORM_indirect
:
8713 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8714 info_ptr
+= bytes_read
;
8715 /* We need to continue parsing from here, so just go back to
8717 goto skip_attribute
;
8720 error (_("Dwarf Error: Cannot handle %s "
8721 "in DWARF reader [in module %s]"),
8722 dwarf_form_name (form
),
8723 bfd_get_filename (abfd
));
8727 if (abbrev
->has_children
)
8728 return skip_children (reader
, info_ptr
);
8733 /* Locate ORIG_PDI's sibling.
8734 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8736 static const gdb_byte
*
8737 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8738 struct partial_die_info
*orig_pdi
,
8739 const gdb_byte
*info_ptr
)
8741 /* Do we know the sibling already? */
8743 if (orig_pdi
->sibling
)
8744 return orig_pdi
->sibling
;
8746 /* Are there any children to deal with? */
8748 if (!orig_pdi
->has_children
)
8751 /* Skip the children the long way. */
8753 return skip_children (reader
, info_ptr
);
8756 /* Expand this partial symbol table into a full symbol table. SELF is
8760 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8762 struct dwarf2_per_objfile
*dwarf2_per_objfile
8763 = get_dwarf2_per_objfile (objfile
);
8765 gdb_assert (!readin
);
8766 /* If this psymtab is constructed from a debug-only objfile, the
8767 has_section_at_zero flag will not necessarily be correct. We
8768 can get the correct value for this flag by looking at the data
8769 associated with the (presumably stripped) associated objfile. */
8770 if (objfile
->separate_debug_objfile_backlink
)
8772 struct dwarf2_per_objfile
*dpo_backlink
8773 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8775 dwarf2_per_objfile
->has_section_at_zero
8776 = dpo_backlink
->has_section_at_zero
;
8779 expand_psymtab (objfile
);
8781 process_cu_includes (dwarf2_per_objfile
);
8784 /* Reading in full CUs. */
8786 /* Add PER_CU to the queue. */
8789 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8790 enum language pretend_language
)
8793 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
8796 /* If PER_CU is not yet queued, add it to the queue.
8797 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8799 The result is non-zero if PER_CU was queued, otherwise the result is zero
8800 meaning either PER_CU is already queued or it is already loaded.
8802 N.B. There is an invariant here that if a CU is queued then it is loaded.
8803 The caller is required to load PER_CU if we return non-zero. */
8806 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8807 struct dwarf2_per_cu_data
*per_cu
,
8808 enum language pretend_language
)
8810 /* We may arrive here during partial symbol reading, if we need full
8811 DIEs to process an unusual case (e.g. template arguments). Do
8812 not queue PER_CU, just tell our caller to load its DIEs. */
8813 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
8815 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8820 /* Mark the dependence relation so that we don't flush PER_CU
8822 if (dependent_cu
!= NULL
)
8823 dwarf2_add_dependence (dependent_cu
, per_cu
);
8825 /* If it's already on the queue, we have nothing to do. */
8829 /* If the compilation unit is already loaded, just mark it as
8831 if (per_cu
->cu
!= NULL
)
8833 per_cu
->cu
->last_used
= 0;
8837 /* Add it to the queue. */
8838 queue_comp_unit (per_cu
, pretend_language
);
8843 /* Process the queue. */
8846 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8848 if (dwarf_read_debug
)
8850 fprintf_unfiltered (gdb_stdlog
,
8851 "Expanding one or more symtabs of objfile %s ...\n",
8852 objfile_name (dwarf2_per_objfile
->objfile
));
8855 /* The queue starts out with one item, but following a DIE reference
8856 may load a new CU, adding it to the end of the queue. */
8857 while (!dwarf2_per_objfile
->queue
.empty ())
8859 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
8861 if ((dwarf2_per_objfile
->using_index
8862 ? !item
.per_cu
->v
.quick
->compunit_symtab
8863 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8864 /* Skip dummy CUs. */
8865 && item
.per_cu
->cu
!= NULL
)
8867 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8868 unsigned int debug_print_threshold
;
8871 if (per_cu
->is_debug_types
)
8873 struct signatured_type
*sig_type
=
8874 (struct signatured_type
*) per_cu
;
8876 sprintf (buf
, "TU %s at offset %s",
8877 hex_string (sig_type
->signature
),
8878 sect_offset_str (per_cu
->sect_off
));
8879 /* There can be 100s of TUs.
8880 Only print them in verbose mode. */
8881 debug_print_threshold
= 2;
8885 sprintf (buf
, "CU at offset %s",
8886 sect_offset_str (per_cu
->sect_off
));
8887 debug_print_threshold
= 1;
8890 if (dwarf_read_debug
>= debug_print_threshold
)
8891 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8893 if (per_cu
->is_debug_types
)
8894 process_full_type_unit (per_cu
, item
.pretend_language
);
8896 process_full_comp_unit (per_cu
, item
.pretend_language
);
8898 if (dwarf_read_debug
>= debug_print_threshold
)
8899 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8902 item
.per_cu
->queued
= 0;
8903 dwarf2_per_objfile
->queue
.pop ();
8906 if (dwarf_read_debug
)
8908 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8909 objfile_name (dwarf2_per_objfile
->objfile
));
8913 /* Read in full symbols for PST, and anything it depends on. */
8916 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8918 gdb_assert (!readin
);
8920 expand_dependencies (objfile
);
8922 dw2_do_instantiate_symtab (per_cu_data
, false);
8923 gdb_assert (get_compunit_symtab () != nullptr);
8926 /* Trivial hash function for die_info: the hash value of a DIE
8927 is its offset in .debug_info for this objfile. */
8930 die_hash (const void *item
)
8932 const struct die_info
*die
= (const struct die_info
*) item
;
8934 return to_underlying (die
->sect_off
);
8937 /* Trivial comparison function for die_info structures: two DIEs
8938 are equal if they have the same offset. */
8941 die_eq (const void *item_lhs
, const void *item_rhs
)
8943 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8944 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8946 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8949 /* Load the DIEs associated with PER_CU into memory. */
8952 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8954 enum language pretend_language
)
8956 gdb_assert (! this_cu
->is_debug_types
);
8958 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
8962 struct dwarf2_cu
*cu
= reader
.cu
;
8963 const gdb_byte
*info_ptr
= reader
.info_ptr
;
8965 gdb_assert (cu
->die_hash
== NULL
);
8967 htab_create_alloc_ex (cu
->header
.length
/ 12,
8971 &cu
->comp_unit_obstack
,
8972 hashtab_obstack_allocate
,
8973 dummy_obstack_deallocate
);
8975 if (reader
.comp_unit_die
->has_children
)
8976 reader
.comp_unit_die
->child
8977 = read_die_and_siblings (&reader
, reader
.info_ptr
,
8978 &info_ptr
, reader
.comp_unit_die
);
8979 cu
->dies
= reader
.comp_unit_die
;
8980 /* comp_unit_die is not stored in die_hash, no need. */
8982 /* We try not to read any attributes in this function, because not
8983 all CUs needed for references have been loaded yet, and symbol
8984 table processing isn't initialized. But we have to set the CU language,
8985 or we won't be able to build types correctly.
8986 Similarly, if we do not read the producer, we can not apply
8987 producer-specific interpretation. */
8988 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
8993 /* Add a DIE to the delayed physname list. */
8996 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8997 const char *name
, struct die_info
*die
,
8998 struct dwarf2_cu
*cu
)
9000 struct delayed_method_info mi
;
9002 mi
.fnfield_index
= fnfield_index
;
9006 cu
->method_list
.push_back (mi
);
9009 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9010 "const" / "volatile". If so, decrements LEN by the length of the
9011 modifier and return true. Otherwise return false. */
9015 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9017 size_t mod_len
= sizeof (mod
) - 1;
9018 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9026 /* Compute the physnames of any methods on the CU's method list.
9028 The computation of method physnames is delayed in order to avoid the
9029 (bad) condition that one of the method's formal parameters is of an as yet
9033 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9035 /* Only C++ delays computing physnames. */
9036 if (cu
->method_list
.empty ())
9038 gdb_assert (cu
->language
== language_cplus
);
9040 for (const delayed_method_info
&mi
: cu
->method_list
)
9042 const char *physname
;
9043 struct fn_fieldlist
*fn_flp
9044 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9045 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9046 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9047 = physname
? physname
: "";
9049 /* Since there's no tag to indicate whether a method is a
9050 const/volatile overload, extract that information out of the
9052 if (physname
!= NULL
)
9054 size_t len
= strlen (physname
);
9058 if (physname
[len
] == ')') /* shortcut */
9060 else if (check_modifier (physname
, len
, " const"))
9061 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9062 else if (check_modifier (physname
, len
, " volatile"))
9063 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9070 /* The list is no longer needed. */
9071 cu
->method_list
.clear ();
9074 /* Go objects should be embedded in a DW_TAG_module DIE,
9075 and it's not clear if/how imported objects will appear.
9076 To keep Go support simple until that's worked out,
9077 go back through what we've read and create something usable.
9078 We could do this while processing each DIE, and feels kinda cleaner,
9079 but that way is more invasive.
9080 This is to, for example, allow the user to type "p var" or "b main"
9081 without having to specify the package name, and allow lookups
9082 of module.object to work in contexts that use the expression
9086 fixup_go_packaging (struct dwarf2_cu
*cu
)
9088 gdb::unique_xmalloc_ptr
<char> package_name
;
9089 struct pending
*list
;
9092 for (list
= *cu
->get_builder ()->get_global_symbols ();
9096 for (i
= 0; i
< list
->nsyms
; ++i
)
9098 struct symbol
*sym
= list
->symbol
[i
];
9100 if (sym
->language () == language_go
9101 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9103 gdb::unique_xmalloc_ptr
<char> this_package_name
9104 (go_symbol_package_name (sym
));
9106 if (this_package_name
== NULL
)
9108 if (package_name
== NULL
)
9109 package_name
= std::move (this_package_name
);
9112 struct objfile
*objfile
9113 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9114 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9115 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9116 (symbol_symtab (sym
) != NULL
9117 ? symtab_to_filename_for_display
9118 (symbol_symtab (sym
))
9119 : objfile_name (objfile
)),
9120 this_package_name
.get (), package_name
.get ());
9126 if (package_name
!= NULL
)
9128 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9129 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9130 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9131 saved_package_name
);
9134 sym
= allocate_symbol (objfile
);
9135 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9136 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9137 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9138 e.g., "main" finds the "main" module and not C's main(). */
9139 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9140 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9141 SYMBOL_TYPE (sym
) = type
;
9143 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9147 /* Allocate a fully-qualified name consisting of the two parts on the
9151 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9153 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9156 /* A helper that allocates a variant part to attach to a Rust enum
9157 type. OBSTACK is where the results should be allocated. TYPE is
9158 the type we're processing. DISCRIMINANT_INDEX is the index of the
9159 discriminant. It must be the index of one of the fields of TYPE.
9160 DEFAULT_INDEX is the index of the default field; or -1 if there is
9161 no default. RANGES is indexed by "effective" field number (the
9162 field index, but omitting the discriminant and default fields) and
9163 must hold the discriminant values used by the variants. Note that
9164 RANGES must have a lifetime at least as long as OBSTACK -- either
9165 already allocated on it, or static. */
9168 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9169 int discriminant_index
, int default_index
,
9170 gdb::array_view
<discriminant_range
> ranges
)
9172 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9173 must be handled by the caller. */
9174 gdb_assert (discriminant_index
>= 0
9175 && discriminant_index
< TYPE_NFIELDS (type
));
9176 gdb_assert (default_index
== -1
9177 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9179 /* We have one variant for each non-discriminant field. */
9180 int n_variants
= TYPE_NFIELDS (type
) - 1;
9182 variant
*variants
= new (obstack
) variant
[n_variants
];
9185 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9187 if (i
== discriminant_index
)
9190 variants
[var_idx
].first_field
= i
;
9191 variants
[var_idx
].last_field
= i
+ 1;
9193 /* The default field does not need a range, but other fields do.
9194 We skipped the discriminant above. */
9195 if (i
!= default_index
)
9197 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9204 gdb_assert (range_idx
== ranges
.size ());
9205 gdb_assert (var_idx
== n_variants
);
9207 variant_part
*part
= new (obstack
) variant_part
;
9208 part
->discriminant_index
= discriminant_index
;
9209 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9210 discriminant_index
));
9211 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9213 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9214 gdb::array_view
<variant_part
> *prop_value
9215 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9217 struct dynamic_prop prop
;
9218 prop
.kind
= PROP_VARIANT_PARTS
;
9219 prop
.data
.variant_parts
= prop_value
;
9221 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9224 /* Some versions of rustc emitted enums in an unusual way.
9226 Ordinary enums were emitted as unions. The first element of each
9227 structure in the union was named "RUST$ENUM$DISR". This element
9228 held the discriminant.
9230 These versions of Rust also implemented the "non-zero"
9231 optimization. When the enum had two values, and one is empty and
9232 the other holds a pointer that cannot be zero, the pointer is used
9233 as the discriminant, with a zero value meaning the empty variant.
9234 Here, the union's first member is of the form
9235 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9236 where the fieldnos are the indices of the fields that should be
9237 traversed in order to find the field (which may be several fields deep)
9238 and the variantname is the name of the variant of the case when the
9241 This function recognizes whether TYPE is of one of these forms,
9242 and, if so, smashes it to be a variant type. */
9245 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9247 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9249 /* We don't need to deal with empty enums. */
9250 if (TYPE_NFIELDS (type
) == 0)
9253 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9254 if (TYPE_NFIELDS (type
) == 1
9255 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9257 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9259 /* Decode the field name to find the offset of the
9261 ULONGEST bit_offset
= 0;
9262 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9263 while (name
[0] >= '0' && name
[0] <= '9')
9266 unsigned long index
= strtoul (name
, &tail
, 10);
9269 || index
>= TYPE_NFIELDS (field_type
)
9270 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9271 != FIELD_LOC_KIND_BITPOS
))
9273 complaint (_("Could not parse Rust enum encoding string \"%s\""
9275 TYPE_FIELD_NAME (type
, 0),
9276 objfile_name (objfile
));
9281 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9282 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9285 /* Smash this type to be a structure type. We have to do this
9286 because the type has already been recorded. */
9287 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9288 TYPE_NFIELDS (type
) = 3;
9289 /* Save the field we care about. */
9290 struct field saved_field
= TYPE_FIELD (type
, 0);
9292 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9294 /* Put the discriminant at index 0. */
9295 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9296 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9297 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9298 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), bit_offset
);
9300 /* The order of fields doesn't really matter, so put the real
9301 field at index 1 and the data-less field at index 2. */
9302 TYPE_FIELD (type
, 1) = saved_field
;
9303 TYPE_FIELD_NAME (type
, 1)
9304 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, 1)));
9305 TYPE_NAME (TYPE_FIELD_TYPE (type
, 1))
9306 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9307 TYPE_FIELD_NAME (type
, 1));
9309 const char *dataless_name
9310 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9312 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9314 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9315 /* NAME points into the original discriminant name, which
9316 already has the correct lifetime. */
9317 TYPE_FIELD_NAME (type
, 2) = name
;
9318 SET_FIELD_BITPOS (TYPE_FIELD (type
, 2), 0);
9320 /* Indicate that this is a variant type. */
9321 static discriminant_range ranges
[1] = { { 0, 0 } };
9322 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9324 /* A union with a single anonymous field is probably an old-style
9326 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9328 /* Smash this type to be a structure type. We have to do this
9329 because the type has already been recorded. */
9330 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9332 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9333 const char *variant_name
9334 = rust_last_path_segment (TYPE_NAME (field_type
));
9335 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9336 TYPE_NAME (field_type
)
9337 = rust_fully_qualify (&objfile
->objfile_obstack
,
9338 TYPE_NAME (type
), variant_name
);
9342 struct type
*disr_type
= nullptr;
9343 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9345 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9347 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9349 /* All fields of a true enum will be structs. */
9352 else if (TYPE_NFIELDS (disr_type
) == 0)
9354 /* Could be data-less variant, so keep going. */
9355 disr_type
= nullptr;
9357 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9358 "RUST$ENUM$DISR") != 0)
9360 /* Not a Rust enum. */
9370 /* If we got here without a discriminant, then it's probably
9372 if (disr_type
== nullptr)
9375 /* Smash this type to be a structure type. We have to do this
9376 because the type has already been recorded. */
9377 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9379 /* Make space for the discriminant field. */
9380 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9382 = (struct field
*) TYPE_ZALLOC (type
, (TYPE_NFIELDS (type
)
9383 * sizeof (struct field
)));
9384 memcpy (new_fields
+ 1, TYPE_FIELDS (type
),
9385 TYPE_NFIELDS (type
) * sizeof (struct field
));
9386 TYPE_FIELDS (type
) = new_fields
;
9387 TYPE_NFIELDS (type
) = TYPE_NFIELDS (type
) + 1;
9389 /* Install the discriminant at index 0 in the union. */
9390 TYPE_FIELD (type
, 0) = *disr_field
;
9391 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9392 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9394 /* We need a way to find the correct discriminant given a
9395 variant name. For convenience we build a map here. */
9396 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9397 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9398 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
9400 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9403 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9404 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9408 int n_fields
= TYPE_NFIELDS (type
);
9409 /* We don't need a range entry for the discriminant, but we do
9410 need one for every other field, as there is no default
9412 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9415 /* Skip the discriminant here. */
9416 for (int i
= 1; i
< n_fields
; ++i
)
9418 /* Find the final word in the name of this variant's type.
9419 That name can be used to look up the correct
9421 const char *variant_name
9422 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, i
)));
9424 auto iter
= discriminant_map
.find (variant_name
);
9425 if (iter
!= discriminant_map
.end ())
9427 ranges
[i
].low
= iter
->second
;
9428 ranges
[i
].high
= iter
->second
;
9431 /* Remove the discriminant field, if it exists. */
9432 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9433 if (TYPE_NFIELDS (sub_type
) > 0)
9435 --TYPE_NFIELDS (sub_type
);
9436 ++TYPE_FIELDS (sub_type
);
9438 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9439 TYPE_NAME (sub_type
)
9440 = rust_fully_qualify (&objfile
->objfile_obstack
,
9441 TYPE_NAME (type
), variant_name
);
9444 /* Indicate that this is a variant type. */
9445 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9446 gdb::array_view
<discriminant_range
> (ranges
,
9451 /* Rewrite some Rust unions to be structures with variants parts. */
9454 rust_union_quirks (struct dwarf2_cu
*cu
)
9456 gdb_assert (cu
->language
== language_rust
);
9457 for (type
*type_
: cu
->rust_unions
)
9458 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9459 /* We don't need this any more. */
9460 cu
->rust_unions
.clear ();
9463 /* Return the symtab for PER_CU. This works properly regardless of
9464 whether we're using the index or psymtabs. */
9466 static struct compunit_symtab
*
9467 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9469 return (per_cu
->dwarf2_per_objfile
->using_index
9470 ? per_cu
->v
.quick
->compunit_symtab
9471 : per_cu
->v
.psymtab
->compunit_symtab
);
9474 /* A helper function for computing the list of all symbol tables
9475 included by PER_CU. */
9478 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9479 htab_t all_children
, htab_t all_type_symtabs
,
9480 struct dwarf2_per_cu_data
*per_cu
,
9481 struct compunit_symtab
*immediate_parent
)
9484 struct compunit_symtab
*cust
;
9486 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9489 /* This inclusion and its children have been processed. */
9494 /* Only add a CU if it has a symbol table. */
9495 cust
= get_compunit_symtab (per_cu
);
9498 /* If this is a type unit only add its symbol table if we haven't
9499 seen it yet (type unit per_cu's can share symtabs). */
9500 if (per_cu
->is_debug_types
)
9502 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9506 result
->push_back (cust
);
9507 if (cust
->user
== NULL
)
9508 cust
->user
= immediate_parent
;
9513 result
->push_back (cust
);
9514 if (cust
->user
== NULL
)
9515 cust
->user
= immediate_parent
;
9519 if (!per_cu
->imported_symtabs_empty ())
9520 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9522 recursively_compute_inclusions (result
, all_children
,
9523 all_type_symtabs
, ptr
, cust
);
9527 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9531 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9533 gdb_assert (! per_cu
->is_debug_types
);
9535 if (!per_cu
->imported_symtabs_empty ())
9538 std::vector
<compunit_symtab
*> result_symtabs
;
9539 htab_t all_children
, all_type_symtabs
;
9540 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9542 /* If we don't have a symtab, we can just skip this case. */
9546 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9547 NULL
, xcalloc
, xfree
);
9548 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9549 NULL
, xcalloc
, xfree
);
9551 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9553 recursively_compute_inclusions (&result_symtabs
, all_children
,
9554 all_type_symtabs
, ptr
, cust
);
9557 /* Now we have a transitive closure of all the included symtabs. */
9558 len
= result_symtabs
.size ();
9560 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9561 struct compunit_symtab
*, len
+ 1);
9562 memcpy (cust
->includes
, result_symtabs
.data (),
9563 len
* sizeof (compunit_symtab
*));
9564 cust
->includes
[len
] = NULL
;
9566 htab_delete (all_children
);
9567 htab_delete (all_type_symtabs
);
9571 /* Compute the 'includes' field for the symtabs of all the CUs we just
9575 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9577 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9579 if (! iter
->is_debug_types
)
9580 compute_compunit_symtab_includes (iter
);
9583 dwarf2_per_objfile
->just_read_cus
.clear ();
9586 /* Generate full symbol information for PER_CU, whose DIEs have
9587 already been loaded into memory. */
9590 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9591 enum language pretend_language
)
9593 struct dwarf2_cu
*cu
= per_cu
->cu
;
9594 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9595 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9596 struct gdbarch
*gdbarch
= objfile
->arch ();
9597 CORE_ADDR lowpc
, highpc
;
9598 struct compunit_symtab
*cust
;
9600 struct block
*static_block
;
9603 baseaddr
= objfile
->text_section_offset ();
9605 /* Clear the list here in case something was left over. */
9606 cu
->method_list
.clear ();
9608 cu
->language
= pretend_language
;
9609 cu
->language_defn
= language_def (cu
->language
);
9611 /* Do line number decoding in read_file_scope () */
9612 process_die (cu
->dies
, cu
);
9614 /* For now fudge the Go package. */
9615 if (cu
->language
== language_go
)
9616 fixup_go_packaging (cu
);
9618 /* Now that we have processed all the DIEs in the CU, all the types
9619 should be complete, and it should now be safe to compute all of the
9621 compute_delayed_physnames (cu
);
9623 if (cu
->language
== language_rust
)
9624 rust_union_quirks (cu
);
9626 /* Some compilers don't define a DW_AT_high_pc attribute for the
9627 compilation unit. If the DW_AT_high_pc is missing, synthesize
9628 it, by scanning the DIE's below the compilation unit. */
9629 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9631 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9632 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9634 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9635 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9636 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9637 addrmap to help ensure it has an accurate map of pc values belonging to
9639 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9641 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9642 SECT_OFF_TEXT (objfile
),
9647 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9649 /* Set symtab language to language from DW_AT_language. If the
9650 compilation is from a C file generated by language preprocessors, do
9651 not set the language if it was already deduced by start_subfile. */
9652 if (!(cu
->language
== language_c
9653 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9654 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9656 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9657 produce DW_AT_location with location lists but it can be possibly
9658 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9659 there were bugs in prologue debug info, fixed later in GCC-4.5
9660 by "unwind info for epilogues" patch (which is not directly related).
9662 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9663 needed, it would be wrong due to missing DW_AT_producer there.
9665 Still one can confuse GDB by using non-standard GCC compilation
9666 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9668 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9669 cust
->locations_valid
= 1;
9671 if (gcc_4_minor
>= 5)
9672 cust
->epilogue_unwind_valid
= 1;
9674 cust
->call_site_htab
= cu
->call_site_htab
;
9677 if (dwarf2_per_objfile
->using_index
)
9678 per_cu
->v
.quick
->compunit_symtab
= cust
;
9681 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9682 pst
->compunit_symtab
= cust
;
9686 /* Push it for inclusion processing later. */
9687 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
9689 /* Not needed any more. */
9690 cu
->reset_builder ();
9693 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9694 already been loaded into memory. */
9697 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9698 enum language pretend_language
)
9700 struct dwarf2_cu
*cu
= per_cu
->cu
;
9701 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9702 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9703 struct compunit_symtab
*cust
;
9704 struct signatured_type
*sig_type
;
9706 gdb_assert (per_cu
->is_debug_types
);
9707 sig_type
= (struct signatured_type
*) per_cu
;
9709 /* Clear the list here in case something was left over. */
9710 cu
->method_list
.clear ();
9712 cu
->language
= pretend_language
;
9713 cu
->language_defn
= language_def (cu
->language
);
9715 /* The symbol tables are set up in read_type_unit_scope. */
9716 process_die (cu
->dies
, cu
);
9718 /* For now fudge the Go package. */
9719 if (cu
->language
== language_go
)
9720 fixup_go_packaging (cu
);
9722 /* Now that we have processed all the DIEs in the CU, all the types
9723 should be complete, and it should now be safe to compute all of the
9725 compute_delayed_physnames (cu
);
9727 if (cu
->language
== language_rust
)
9728 rust_union_quirks (cu
);
9730 /* TUs share symbol tables.
9731 If this is the first TU to use this symtab, complete the construction
9732 of it with end_expandable_symtab. Otherwise, complete the addition of
9733 this TU's symbols to the existing symtab. */
9734 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9736 buildsym_compunit
*builder
= cu
->get_builder ();
9737 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9738 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9742 /* Set symtab language to language from DW_AT_language. If the
9743 compilation is from a C file generated by language preprocessors,
9744 do not set the language if it was already deduced by
9746 if (!(cu
->language
== language_c
9747 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9748 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9753 cu
->get_builder ()->augment_type_symtab ();
9754 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9757 if (dwarf2_per_objfile
->using_index
)
9758 per_cu
->v
.quick
->compunit_symtab
= cust
;
9761 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9762 pst
->compunit_symtab
= cust
;
9766 /* Not needed any more. */
9767 cu
->reset_builder ();
9770 /* Process an imported unit DIE. */
9773 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9775 struct attribute
*attr
;
9777 /* For now we don't handle imported units in type units. */
9778 if (cu
->per_cu
->is_debug_types
)
9780 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9781 " supported in type units [in module %s]"),
9782 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9785 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9788 sect_offset sect_off
= attr
->get_ref_die_offset ();
9789 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9790 dwarf2_per_cu_data
*per_cu
9791 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9792 cu
->per_cu
->dwarf2_per_objfile
);
9794 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9795 into another compilation unit, at root level. Regard this as a hint,
9797 if (die
->parent
&& die
->parent
->parent
== NULL
9798 && per_cu
->unit_type
== DW_UT_compile
9799 && per_cu
->lang
== language_cplus
)
9802 /* If necessary, add it to the queue and load its DIEs. */
9803 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9804 load_full_comp_unit (per_cu
, false, cu
->language
);
9806 cu
->per_cu
->imported_symtabs_push (per_cu
);
9810 /* RAII object that represents a process_die scope: i.e.,
9811 starts/finishes processing a DIE. */
9812 class process_die_scope
9815 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9816 : m_die (die
), m_cu (cu
)
9818 /* We should only be processing DIEs not already in process. */
9819 gdb_assert (!m_die
->in_process
);
9820 m_die
->in_process
= true;
9823 ~process_die_scope ()
9825 m_die
->in_process
= false;
9827 /* If we're done processing the DIE for the CU that owns the line
9828 header, we don't need the line header anymore. */
9829 if (m_cu
->line_header_die_owner
== m_die
)
9831 delete m_cu
->line_header
;
9832 m_cu
->line_header
= NULL
;
9833 m_cu
->line_header_die_owner
= NULL
;
9842 /* Process a die and its children. */
9845 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9847 process_die_scope
scope (die
, cu
);
9851 case DW_TAG_padding
:
9853 case DW_TAG_compile_unit
:
9854 case DW_TAG_partial_unit
:
9855 read_file_scope (die
, cu
);
9857 case DW_TAG_type_unit
:
9858 read_type_unit_scope (die
, cu
);
9860 case DW_TAG_subprogram
:
9861 /* Nested subprograms in Fortran get a prefix. */
9862 if (cu
->language
== language_fortran
9863 && die
->parent
!= NULL
9864 && die
->parent
->tag
== DW_TAG_subprogram
)
9865 cu
->processing_has_namespace_info
= true;
9867 case DW_TAG_inlined_subroutine
:
9868 read_func_scope (die
, cu
);
9870 case DW_TAG_lexical_block
:
9871 case DW_TAG_try_block
:
9872 case DW_TAG_catch_block
:
9873 read_lexical_block_scope (die
, cu
);
9875 case DW_TAG_call_site
:
9876 case DW_TAG_GNU_call_site
:
9877 read_call_site_scope (die
, cu
);
9879 case DW_TAG_class_type
:
9880 case DW_TAG_interface_type
:
9881 case DW_TAG_structure_type
:
9882 case DW_TAG_union_type
:
9883 process_structure_scope (die
, cu
);
9885 case DW_TAG_enumeration_type
:
9886 process_enumeration_scope (die
, cu
);
9889 /* These dies have a type, but processing them does not create
9890 a symbol or recurse to process the children. Therefore we can
9891 read them on-demand through read_type_die. */
9892 case DW_TAG_subroutine_type
:
9893 case DW_TAG_set_type
:
9894 case DW_TAG_array_type
:
9895 case DW_TAG_pointer_type
:
9896 case DW_TAG_ptr_to_member_type
:
9897 case DW_TAG_reference_type
:
9898 case DW_TAG_rvalue_reference_type
:
9899 case DW_TAG_string_type
:
9902 case DW_TAG_base_type
:
9903 case DW_TAG_subrange_type
:
9904 case DW_TAG_typedef
:
9905 /* Add a typedef symbol for the type definition, if it has a
9907 new_symbol (die
, read_type_die (die
, cu
), cu
);
9909 case DW_TAG_common_block
:
9910 read_common_block (die
, cu
);
9912 case DW_TAG_common_inclusion
:
9914 case DW_TAG_namespace
:
9915 cu
->processing_has_namespace_info
= true;
9916 read_namespace (die
, cu
);
9919 cu
->processing_has_namespace_info
= true;
9920 read_module (die
, cu
);
9922 case DW_TAG_imported_declaration
:
9923 cu
->processing_has_namespace_info
= true;
9924 if (read_namespace_alias (die
, cu
))
9926 /* The declaration is not a global namespace alias. */
9928 case DW_TAG_imported_module
:
9929 cu
->processing_has_namespace_info
= true;
9930 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9931 || cu
->language
!= language_fortran
))
9932 complaint (_("Tag '%s' has unexpected children"),
9933 dwarf_tag_name (die
->tag
));
9934 read_import_statement (die
, cu
);
9937 case DW_TAG_imported_unit
:
9938 process_imported_unit_die (die
, cu
);
9941 case DW_TAG_variable
:
9942 read_variable (die
, cu
);
9946 new_symbol (die
, NULL
, cu
);
9951 /* DWARF name computation. */
9953 /* A helper function for dwarf2_compute_name which determines whether DIE
9954 needs to have the name of the scope prepended to the name listed in the
9958 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9960 struct attribute
*attr
;
9964 case DW_TAG_namespace
:
9965 case DW_TAG_typedef
:
9966 case DW_TAG_class_type
:
9967 case DW_TAG_interface_type
:
9968 case DW_TAG_structure_type
:
9969 case DW_TAG_union_type
:
9970 case DW_TAG_enumeration_type
:
9971 case DW_TAG_enumerator
:
9972 case DW_TAG_subprogram
:
9973 case DW_TAG_inlined_subroutine
:
9975 case DW_TAG_imported_declaration
:
9978 case DW_TAG_variable
:
9979 case DW_TAG_constant
:
9980 /* We only need to prefix "globally" visible variables. These include
9981 any variable marked with DW_AT_external or any variable that
9982 lives in a namespace. [Variables in anonymous namespaces
9983 require prefixing, but they are not DW_AT_external.] */
9985 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
9987 struct dwarf2_cu
*spec_cu
= cu
;
9989 return die_needs_namespace (die_specification (die
, &spec_cu
),
9993 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9994 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
9995 && die
->parent
->tag
!= DW_TAG_module
)
9997 /* A variable in a lexical block of some kind does not need a
9998 namespace, even though in C++ such variables may be external
9999 and have a mangled name. */
10000 if (die
->parent
->tag
== DW_TAG_lexical_block
10001 || die
->parent
->tag
== DW_TAG_try_block
10002 || die
->parent
->tag
== DW_TAG_catch_block
10003 || die
->parent
->tag
== DW_TAG_subprogram
)
10012 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10013 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10014 defined for the given DIE. */
10016 static struct attribute
*
10017 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10019 struct attribute
*attr
;
10021 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10023 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10028 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10029 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10030 defined for the given DIE. */
10032 static const char *
10033 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10035 const char *linkage_name
;
10037 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10038 if (linkage_name
== NULL
)
10039 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10041 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10042 See https://github.com/rust-lang/rust/issues/32925. */
10043 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10044 && strchr (linkage_name
, '{') != NULL
)
10045 linkage_name
= NULL
;
10047 return linkage_name
;
10050 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10051 compute the physname for the object, which include a method's:
10052 - formal parameters (C++),
10053 - receiver type (Go),
10055 The term "physname" is a bit confusing.
10056 For C++, for example, it is the demangled name.
10057 For Go, for example, it's the mangled name.
10059 For Ada, return the DIE's linkage name rather than the fully qualified
10060 name. PHYSNAME is ignored..
10062 The result is allocated on the objfile_obstack and canonicalized. */
10064 static const char *
10065 dwarf2_compute_name (const char *name
,
10066 struct die_info
*die
, struct dwarf2_cu
*cu
,
10069 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10072 name
= dwarf2_name (die
, cu
);
10074 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10075 but otherwise compute it by typename_concat inside GDB.
10076 FIXME: Actually this is not really true, or at least not always true.
10077 It's all very confusing. compute_and_set_names doesn't try to demangle
10078 Fortran names because there is no mangling standard. So new_symbol
10079 will set the demangled name to the result of dwarf2_full_name, and it is
10080 the demangled name that GDB uses if it exists. */
10081 if (cu
->language
== language_ada
10082 || (cu
->language
== language_fortran
&& physname
))
10084 /* For Ada unit, we prefer the linkage name over the name, as
10085 the former contains the exported name, which the user expects
10086 to be able to reference. Ideally, we want the user to be able
10087 to reference this entity using either natural or linkage name,
10088 but we haven't started looking at this enhancement yet. */
10089 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10091 if (linkage_name
!= NULL
)
10092 return linkage_name
;
10095 /* These are the only languages we know how to qualify names in. */
10097 && (cu
->language
== language_cplus
10098 || cu
->language
== language_fortran
|| cu
->language
== language_d
10099 || cu
->language
== language_rust
))
10101 if (die_needs_namespace (die
, cu
))
10103 const char *prefix
;
10104 const char *canonical_name
= NULL
;
10108 prefix
= determine_prefix (die
, cu
);
10109 if (*prefix
!= '\0')
10111 gdb::unique_xmalloc_ptr
<char> prefixed_name
10112 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10114 buf
.puts (prefixed_name
.get ());
10119 /* Template parameters may be specified in the DIE's DW_AT_name, or
10120 as children with DW_TAG_template_type_param or
10121 DW_TAG_value_type_param. If the latter, add them to the name
10122 here. If the name already has template parameters, then
10123 skip this step; some versions of GCC emit both, and
10124 it is more efficient to use the pre-computed name.
10126 Something to keep in mind about this process: it is very
10127 unlikely, or in some cases downright impossible, to produce
10128 something that will match the mangled name of a function.
10129 If the definition of the function has the same debug info,
10130 we should be able to match up with it anyway. But fallbacks
10131 using the minimal symbol, for instance to find a method
10132 implemented in a stripped copy of libstdc++, will not work.
10133 If we do not have debug info for the definition, we will have to
10134 match them up some other way.
10136 When we do name matching there is a related problem with function
10137 templates; two instantiated function templates are allowed to
10138 differ only by their return types, which we do not add here. */
10140 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10142 struct attribute
*attr
;
10143 struct die_info
*child
;
10146 die
->building_fullname
= 1;
10148 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10152 const gdb_byte
*bytes
;
10153 struct dwarf2_locexpr_baton
*baton
;
10156 if (child
->tag
!= DW_TAG_template_type_param
10157 && child
->tag
!= DW_TAG_template_value_param
)
10168 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10171 complaint (_("template parameter missing DW_AT_type"));
10172 buf
.puts ("UNKNOWN_TYPE");
10175 type
= die_type (child
, cu
);
10177 if (child
->tag
== DW_TAG_template_type_param
)
10179 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10180 &type_print_raw_options
);
10184 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10187 complaint (_("template parameter missing "
10188 "DW_AT_const_value"));
10189 buf
.puts ("UNKNOWN_VALUE");
10193 dwarf2_const_value_attr (attr
, type
, name
,
10194 &cu
->comp_unit_obstack
, cu
,
10195 &value
, &bytes
, &baton
);
10197 if (TYPE_NOSIGN (type
))
10198 /* GDB prints characters as NUMBER 'CHAR'. If that's
10199 changed, this can use value_print instead. */
10200 c_printchar (value
, type
, &buf
);
10203 struct value_print_options opts
;
10206 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10210 else if (bytes
!= NULL
)
10212 v
= allocate_value (type
);
10213 memcpy (value_contents_writeable (v
), bytes
,
10214 TYPE_LENGTH (type
));
10217 v
= value_from_longest (type
, value
);
10219 /* Specify decimal so that we do not depend on
10221 get_formatted_print_options (&opts
, 'd');
10223 value_print (v
, &buf
, &opts
);
10228 die
->building_fullname
= 0;
10232 /* Close the argument list, with a space if necessary
10233 (nested templates). */
10234 if (!buf
.empty () && buf
.string ().back () == '>')
10241 /* For C++ methods, append formal parameter type
10242 information, if PHYSNAME. */
10244 if (physname
&& die
->tag
== DW_TAG_subprogram
10245 && cu
->language
== language_cplus
)
10247 struct type
*type
= read_type_die (die
, cu
);
10249 c_type_print_args (type
, &buf
, 1, cu
->language
,
10250 &type_print_raw_options
);
10252 if (cu
->language
== language_cplus
)
10254 /* Assume that an artificial first parameter is
10255 "this", but do not crash if it is not. RealView
10256 marks unnamed (and thus unused) parameters as
10257 artificial; there is no way to differentiate
10259 if (TYPE_NFIELDS (type
) > 0
10260 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10261 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10262 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10264 buf
.puts (" const");
10268 const std::string
&intermediate_name
= buf
.string ();
10270 if (cu
->language
== language_cplus
)
10272 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10275 /* If we only computed INTERMEDIATE_NAME, or if
10276 INTERMEDIATE_NAME is already canonical, then we need to
10278 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10279 name
= objfile
->intern (intermediate_name
);
10281 name
= canonical_name
;
10288 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10289 If scope qualifiers are appropriate they will be added. The result
10290 will be allocated on the storage_obstack, or NULL if the DIE does
10291 not have a name. NAME may either be from a previous call to
10292 dwarf2_name or NULL.
10294 The output string will be canonicalized (if C++). */
10296 static const char *
10297 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10299 return dwarf2_compute_name (name
, die
, cu
, 0);
10302 /* Construct a physname for the given DIE in CU. NAME may either be
10303 from a previous call to dwarf2_name or NULL. The result will be
10304 allocated on the objfile_objstack or NULL if the DIE does not have a
10307 The output string will be canonicalized (if C++). */
10309 static const char *
10310 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10312 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10313 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10316 /* In this case dwarf2_compute_name is just a shortcut not building anything
10318 if (!die_needs_namespace (die
, cu
))
10319 return dwarf2_compute_name (name
, die
, cu
, 1);
10321 if (cu
->language
!= language_rust
)
10322 mangled
= dw2_linkage_name (die
, cu
);
10324 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10326 gdb::unique_xmalloc_ptr
<char> demangled
;
10327 if (mangled
!= NULL
)
10330 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10332 /* Do nothing (do not demangle the symbol name). */
10334 else if (cu
->language
== language_go
)
10336 /* This is a lie, but we already lie to the caller new_symbol.
10337 new_symbol assumes we return the mangled name.
10338 This just undoes that lie until things are cleaned up. */
10342 /* Use DMGL_RET_DROP for C++ template functions to suppress
10343 their return type. It is easier for GDB users to search
10344 for such functions as `name(params)' than `long name(params)'.
10345 In such case the minimal symbol names do not match the full
10346 symbol names but for template functions there is never a need
10347 to look up their definition from their declaration so
10348 the only disadvantage remains the minimal symbol variant
10349 `long name(params)' does not have the proper inferior type. */
10350 demangled
.reset (gdb_demangle (mangled
,
10351 (DMGL_PARAMS
| DMGL_ANSI
10352 | DMGL_RET_DROP
)));
10355 canon
= demangled
.get ();
10363 if (canon
== NULL
|| check_physname
)
10365 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10367 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10369 /* It may not mean a bug in GDB. The compiler could also
10370 compute DW_AT_linkage_name incorrectly. But in such case
10371 GDB would need to be bug-to-bug compatible. */
10373 complaint (_("Computed physname <%s> does not match demangled <%s> "
10374 "(from linkage <%s>) - DIE at %s [in module %s]"),
10375 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10376 objfile_name (objfile
));
10378 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10379 is available here - over computed PHYSNAME. It is safer
10380 against both buggy GDB and buggy compilers. */
10394 retval
= objfile
->intern (retval
);
10399 /* Inspect DIE in CU for a namespace alias. If one exists, record
10400 a new symbol for it.
10402 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10405 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10407 struct attribute
*attr
;
10409 /* If the die does not have a name, this is not a namespace
10411 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10415 struct die_info
*d
= die
;
10416 struct dwarf2_cu
*imported_cu
= cu
;
10418 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10419 keep inspecting DIEs until we hit the underlying import. */
10420 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10421 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10423 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10427 d
= follow_die_ref (d
, attr
, &imported_cu
);
10428 if (d
->tag
!= DW_TAG_imported_declaration
)
10432 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10434 complaint (_("DIE at %s has too many recursively imported "
10435 "declarations"), sect_offset_str (d
->sect_off
));
10442 sect_offset sect_off
= attr
->get_ref_die_offset ();
10444 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10445 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
10447 /* This declaration is a global namespace alias. Add
10448 a symbol for it whose type is the aliased namespace. */
10449 new_symbol (die
, type
, cu
);
10458 /* Return the using directives repository (global or local?) to use in the
10459 current context for CU.
10461 For Ada, imported declarations can materialize renamings, which *may* be
10462 global. However it is impossible (for now?) in DWARF to distinguish
10463 "external" imported declarations and "static" ones. As all imported
10464 declarations seem to be static in all other languages, make them all CU-wide
10465 global only in Ada. */
10467 static struct using_direct
**
10468 using_directives (struct dwarf2_cu
*cu
)
10470 if (cu
->language
== language_ada
10471 && cu
->get_builder ()->outermost_context_p ())
10472 return cu
->get_builder ()->get_global_using_directives ();
10474 return cu
->get_builder ()->get_local_using_directives ();
10477 /* Read the import statement specified by the given die and record it. */
10480 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10482 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10483 struct attribute
*import_attr
;
10484 struct die_info
*imported_die
, *child_die
;
10485 struct dwarf2_cu
*imported_cu
;
10486 const char *imported_name
;
10487 const char *imported_name_prefix
;
10488 const char *canonical_name
;
10489 const char *import_alias
;
10490 const char *imported_declaration
= NULL
;
10491 const char *import_prefix
;
10492 std::vector
<const char *> excludes
;
10494 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10495 if (import_attr
== NULL
)
10497 complaint (_("Tag '%s' has no DW_AT_import"),
10498 dwarf_tag_name (die
->tag
));
10503 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10504 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10505 if (imported_name
== NULL
)
10507 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10509 The import in the following code:
10523 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10524 <52> DW_AT_decl_file : 1
10525 <53> DW_AT_decl_line : 6
10526 <54> DW_AT_import : <0x75>
10527 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10528 <59> DW_AT_name : B
10529 <5b> DW_AT_decl_file : 1
10530 <5c> DW_AT_decl_line : 2
10531 <5d> DW_AT_type : <0x6e>
10533 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10534 <76> DW_AT_byte_size : 4
10535 <77> DW_AT_encoding : 5 (signed)
10537 imports the wrong die ( 0x75 instead of 0x58 ).
10538 This case will be ignored until the gcc bug is fixed. */
10542 /* Figure out the local name after import. */
10543 import_alias
= dwarf2_name (die
, cu
);
10545 /* Figure out where the statement is being imported to. */
10546 import_prefix
= determine_prefix (die
, cu
);
10548 /* Figure out what the scope of the imported die is and prepend it
10549 to the name of the imported die. */
10550 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10552 if (imported_die
->tag
!= DW_TAG_namespace
10553 && imported_die
->tag
!= DW_TAG_module
)
10555 imported_declaration
= imported_name
;
10556 canonical_name
= imported_name_prefix
;
10558 else if (strlen (imported_name_prefix
) > 0)
10559 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10560 imported_name_prefix
,
10561 (cu
->language
== language_d
? "." : "::"),
10562 imported_name
, (char *) NULL
);
10564 canonical_name
= imported_name
;
10566 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10567 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10568 child_die
= child_die
->sibling
)
10570 /* DWARF-4: A Fortran use statement with a “rename list” may be
10571 represented by an imported module entry with an import attribute
10572 referring to the module and owned entries corresponding to those
10573 entities that are renamed as part of being imported. */
10575 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10577 complaint (_("child DW_TAG_imported_declaration expected "
10578 "- DIE at %s [in module %s]"),
10579 sect_offset_str (child_die
->sect_off
),
10580 objfile_name (objfile
));
10584 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10585 if (import_attr
== NULL
)
10587 complaint (_("Tag '%s' has no DW_AT_import"),
10588 dwarf_tag_name (child_die
->tag
));
10593 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10595 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10596 if (imported_name
== NULL
)
10598 complaint (_("child DW_TAG_imported_declaration has unknown "
10599 "imported name - DIE at %s [in module %s]"),
10600 sect_offset_str (child_die
->sect_off
),
10601 objfile_name (objfile
));
10605 excludes
.push_back (imported_name
);
10607 process_die (child_die
, cu
);
10610 add_using_directive (using_directives (cu
),
10614 imported_declaration
,
10617 &objfile
->objfile_obstack
);
10620 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10621 types, but gives them a size of zero. Starting with version 14,
10622 ICC is compatible with GCC. */
10625 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10627 if (!cu
->checked_producer
)
10628 check_producer (cu
);
10630 return cu
->producer_is_icc_lt_14
;
10633 /* ICC generates a DW_AT_type for C void functions. This was observed on
10634 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10635 which says that void functions should not have a DW_AT_type. */
10638 producer_is_icc (struct dwarf2_cu
*cu
)
10640 if (!cu
->checked_producer
)
10641 check_producer (cu
);
10643 return cu
->producer_is_icc
;
10646 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10647 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10648 this, it was first present in GCC release 4.3.0. */
10651 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10653 if (!cu
->checked_producer
)
10654 check_producer (cu
);
10656 return cu
->producer_is_gcc_lt_4_3
;
10659 static file_and_directory
10660 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10662 file_and_directory res
;
10664 /* Find the filename. Do not use dwarf2_name here, since the filename
10665 is not a source language identifier. */
10666 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10667 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10669 if (res
.comp_dir
== NULL
10670 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10671 && IS_ABSOLUTE_PATH (res
.name
))
10673 res
.comp_dir_storage
= ldirname (res
.name
);
10674 if (!res
.comp_dir_storage
.empty ())
10675 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10677 if (res
.comp_dir
!= NULL
)
10679 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10680 directory, get rid of it. */
10681 const char *cp
= strchr (res
.comp_dir
, ':');
10683 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10684 res
.comp_dir
= cp
+ 1;
10687 if (res
.name
== NULL
)
10688 res
.name
= "<unknown>";
10693 /* Handle DW_AT_stmt_list for a compilation unit.
10694 DIE is the DW_TAG_compile_unit die for CU.
10695 COMP_DIR is the compilation directory. LOWPC is passed to
10696 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10699 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10700 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10702 struct dwarf2_per_objfile
*dwarf2_per_objfile
10703 = cu
->per_cu
->dwarf2_per_objfile
;
10704 struct attribute
*attr
;
10705 struct line_header line_header_local
;
10706 hashval_t line_header_local_hash
;
10708 int decode_mapping
;
10710 gdb_assert (! cu
->per_cu
->is_debug_types
);
10712 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10716 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10718 /* The line header hash table is only created if needed (it exists to
10719 prevent redundant reading of the line table for partial_units).
10720 If we're given a partial_unit, we'll need it. If we're given a
10721 compile_unit, then use the line header hash table if it's already
10722 created, but don't create one just yet. */
10724 if (dwarf2_per_objfile
->line_header_hash
== NULL
10725 && die
->tag
== DW_TAG_partial_unit
)
10727 dwarf2_per_objfile
->line_header_hash
10728 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10729 line_header_eq_voidp
,
10730 free_line_header_voidp
,
10734 line_header_local
.sect_off
= line_offset
;
10735 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10736 line_header_local_hash
= line_header_hash (&line_header_local
);
10737 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10739 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10740 &line_header_local
,
10741 line_header_local_hash
, NO_INSERT
);
10743 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10744 is not present in *SLOT (since if there is something in *SLOT then
10745 it will be for a partial_unit). */
10746 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10748 gdb_assert (*slot
!= NULL
);
10749 cu
->line_header
= (struct line_header
*) *slot
;
10754 /* dwarf_decode_line_header does not yet provide sufficient information.
10755 We always have to call also dwarf_decode_lines for it. */
10756 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10760 cu
->line_header
= lh
.release ();
10761 cu
->line_header_die_owner
= die
;
10763 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10767 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10768 &line_header_local
,
10769 line_header_local_hash
, INSERT
);
10770 gdb_assert (slot
!= NULL
);
10772 if (slot
!= NULL
&& *slot
== NULL
)
10774 /* This newly decoded line number information unit will be owned
10775 by line_header_hash hash table. */
10776 *slot
= cu
->line_header
;
10777 cu
->line_header_die_owner
= NULL
;
10781 /* We cannot free any current entry in (*slot) as that struct line_header
10782 may be already used by multiple CUs. Create only temporary decoded
10783 line_header for this CU - it may happen at most once for each line
10784 number information unit. And if we're not using line_header_hash
10785 then this is what we want as well. */
10786 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10788 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10789 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10794 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10797 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10799 struct dwarf2_per_objfile
*dwarf2_per_objfile
10800 = cu
->per_cu
->dwarf2_per_objfile
;
10801 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10802 struct gdbarch
*gdbarch
= objfile
->arch ();
10803 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10804 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10805 struct attribute
*attr
;
10806 struct die_info
*child_die
;
10807 CORE_ADDR baseaddr
;
10809 prepare_one_comp_unit (cu
, die
, cu
->language
);
10810 baseaddr
= objfile
->text_section_offset ();
10812 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10814 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10815 from finish_block. */
10816 if (lowpc
== ((CORE_ADDR
) -1))
10818 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10820 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10822 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10823 standardised yet. As a workaround for the language detection we fall
10824 back to the DW_AT_producer string. */
10825 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10826 cu
->language
= language_opencl
;
10828 /* Similar hack for Go. */
10829 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10830 set_cu_language (DW_LANG_Go
, cu
);
10832 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10834 /* Decode line number information if present. We do this before
10835 processing child DIEs, so that the line header table is available
10836 for DW_AT_decl_file. */
10837 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10839 /* Process all dies in compilation unit. */
10840 if (die
->child
!= NULL
)
10842 child_die
= die
->child
;
10843 while (child_die
&& child_die
->tag
)
10845 process_die (child_die
, cu
);
10846 child_die
= child_die
->sibling
;
10850 /* Decode macro information, if present. Dwarf 2 macro information
10851 refers to information in the line number info statement program
10852 header, so we can only read it if we've read the header
10854 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10856 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10857 if (attr
&& cu
->line_header
)
10859 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10860 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10862 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10866 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10867 if (attr
&& cu
->line_header
)
10869 unsigned int macro_offset
= DW_UNSND (attr
);
10871 dwarf_decode_macros (cu
, macro_offset
, 0);
10877 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10879 struct type_unit_group
*tu_group
;
10881 struct attribute
*attr
;
10883 struct signatured_type
*sig_type
;
10885 gdb_assert (per_cu
->is_debug_types
);
10886 sig_type
= (struct signatured_type
*) per_cu
;
10888 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10890 /* If we're using .gdb_index (includes -readnow) then
10891 per_cu->type_unit_group may not have been set up yet. */
10892 if (sig_type
->type_unit_group
== NULL
)
10893 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10894 tu_group
= sig_type
->type_unit_group
;
10896 /* If we've already processed this stmt_list there's no real need to
10897 do it again, we could fake it and just recreate the part we need
10898 (file name,index -> symtab mapping). If data shows this optimization
10899 is useful we can do it then. */
10900 first_time
= tu_group
->compunit_symtab
== NULL
;
10902 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10907 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10908 lh
= dwarf_decode_line_header (line_offset
, this);
10913 start_symtab ("", NULL
, 0);
10916 gdb_assert (tu_group
->symtabs
== NULL
);
10917 gdb_assert (m_builder
== nullptr);
10918 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10919 m_builder
.reset (new struct buildsym_compunit
10920 (COMPUNIT_OBJFILE (cust
), "",
10921 COMPUNIT_DIRNAME (cust
),
10922 compunit_language (cust
),
10924 list_in_scope
= get_builder ()->get_file_symbols ();
10929 line_header
= lh
.release ();
10930 line_header_die_owner
= die
;
10934 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
10936 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10937 still initializing it, and our caller (a few levels up)
10938 process_full_type_unit still needs to know if this is the first
10942 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
10943 struct symtab
*, line_header
->file_names_size ());
10945 auto &file_names
= line_header
->file_names ();
10946 for (i
= 0; i
< file_names
.size (); ++i
)
10948 file_entry
&fe
= file_names
[i
];
10949 dwarf2_start_subfile (this, fe
.name
,
10950 fe
.include_dir (line_header
));
10951 buildsym_compunit
*b
= get_builder ();
10952 if (b
->get_current_subfile ()->symtab
== NULL
)
10954 /* NOTE: start_subfile will recognize when it's been
10955 passed a file it has already seen. So we can't
10956 assume there's a simple mapping from
10957 cu->line_header->file_names to subfiles, plus
10958 cu->line_header->file_names may contain dups. */
10959 b
->get_current_subfile ()->symtab
10960 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
10963 fe
.symtab
= b
->get_current_subfile ()->symtab
;
10964 tu_group
->symtabs
[i
] = fe
.symtab
;
10969 gdb_assert (m_builder
== nullptr);
10970 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10971 m_builder
.reset (new struct buildsym_compunit
10972 (COMPUNIT_OBJFILE (cust
), "",
10973 COMPUNIT_DIRNAME (cust
),
10974 compunit_language (cust
),
10976 list_in_scope
= get_builder ()->get_file_symbols ();
10978 auto &file_names
= line_header
->file_names ();
10979 for (i
= 0; i
< file_names
.size (); ++i
)
10981 file_entry
&fe
= file_names
[i
];
10982 fe
.symtab
= tu_group
->symtabs
[i
];
10986 /* The main symtab is allocated last. Type units don't have DW_AT_name
10987 so they don't have a "real" (so to speak) symtab anyway.
10988 There is later code that will assign the main symtab to all symbols
10989 that don't have one. We need to handle the case of a symbol with a
10990 missing symtab (DW_AT_decl_file) anyway. */
10993 /* Process DW_TAG_type_unit.
10994 For TUs we want to skip the first top level sibling if it's not the
10995 actual type being defined by this TU. In this case the first top
10996 level sibling is there to provide context only. */
10999 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11001 struct die_info
*child_die
;
11003 prepare_one_comp_unit (cu
, die
, language_minimal
);
11005 /* Initialize (or reinitialize) the machinery for building symtabs.
11006 We do this before processing child DIEs, so that the line header table
11007 is available for DW_AT_decl_file. */
11008 cu
->setup_type_unit_groups (die
);
11010 if (die
->child
!= NULL
)
11012 child_die
= die
->child
;
11013 while (child_die
&& child_die
->tag
)
11015 process_die (child_die
, cu
);
11016 child_die
= child_die
->sibling
;
11023 http://gcc.gnu.org/wiki/DebugFission
11024 http://gcc.gnu.org/wiki/DebugFissionDWP
11026 To simplify handling of both DWO files ("object" files with the DWARF info)
11027 and DWP files (a file with the DWOs packaged up into one file), we treat
11028 DWP files as having a collection of virtual DWO files. */
11031 hash_dwo_file (const void *item
)
11033 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11036 hash
= htab_hash_string (dwo_file
->dwo_name
);
11037 if (dwo_file
->comp_dir
!= NULL
)
11038 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11043 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11045 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11046 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11048 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11050 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11051 return lhs
->comp_dir
== rhs
->comp_dir
;
11052 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11055 /* Allocate a hash table for DWO files. */
11058 allocate_dwo_file_hash_table ()
11060 auto delete_dwo_file
= [] (void *item
)
11062 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11067 return htab_up (htab_create_alloc (41,
11074 /* Lookup DWO file DWO_NAME. */
11077 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11078 const char *dwo_name
,
11079 const char *comp_dir
)
11081 struct dwo_file find_entry
;
11084 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11085 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
11087 find_entry
.dwo_name
= dwo_name
;
11088 find_entry
.comp_dir
= comp_dir
;
11089 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11096 hash_dwo_unit (const void *item
)
11098 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11100 /* This drops the top 32 bits of the id, but is ok for a hash. */
11101 return dwo_unit
->signature
;
11105 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11107 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11108 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11110 /* The signature is assumed to be unique within the DWO file.
11111 So while object file CU dwo_id's always have the value zero,
11112 that's OK, assuming each object file DWO file has only one CU,
11113 and that's the rule for now. */
11114 return lhs
->signature
== rhs
->signature
;
11117 /* Allocate a hash table for DWO CUs,TUs.
11118 There is one of these tables for each of CUs,TUs for each DWO file. */
11121 allocate_dwo_unit_table ()
11123 /* Start out with a pretty small number.
11124 Generally DWO files contain only one CU and maybe some TUs. */
11125 return htab_up (htab_create_alloc (3,
11128 NULL
, xcalloc
, xfree
));
11131 /* die_reader_func for create_dwo_cu. */
11134 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11135 const gdb_byte
*info_ptr
,
11136 struct die_info
*comp_unit_die
,
11137 struct dwo_file
*dwo_file
,
11138 struct dwo_unit
*dwo_unit
)
11140 struct dwarf2_cu
*cu
= reader
->cu
;
11141 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11142 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11144 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11145 if (!signature
.has_value ())
11147 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11148 " its dwo_id [in module %s]"),
11149 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11153 dwo_unit
->dwo_file
= dwo_file
;
11154 dwo_unit
->signature
= *signature
;
11155 dwo_unit
->section
= section
;
11156 dwo_unit
->sect_off
= sect_off
;
11157 dwo_unit
->length
= cu
->per_cu
->length
;
11159 if (dwarf_read_debug
)
11160 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11161 sect_offset_str (sect_off
),
11162 hex_string (dwo_unit
->signature
));
11165 /* Create the dwo_units for the CUs in a DWO_FILE.
11166 Note: This function processes DWO files only, not DWP files. */
11169 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11170 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11171 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11173 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11174 const gdb_byte
*info_ptr
, *end_ptr
;
11176 section
.read (objfile
);
11177 info_ptr
= section
.buffer
;
11179 if (info_ptr
== NULL
)
11182 if (dwarf_read_debug
)
11184 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11185 section
.get_name (),
11186 section
.get_file_name ());
11189 end_ptr
= info_ptr
+ section
.size
;
11190 while (info_ptr
< end_ptr
)
11192 struct dwarf2_per_cu_data per_cu
;
11193 struct dwo_unit read_unit
{};
11194 struct dwo_unit
*dwo_unit
;
11196 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11198 memset (&per_cu
, 0, sizeof (per_cu
));
11199 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11200 per_cu
.is_debug_types
= 0;
11201 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11202 per_cu
.section
= §ion
;
11204 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11205 if (!reader
.dummy_p
)
11206 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11207 &dwo_file
, &read_unit
);
11208 info_ptr
+= per_cu
.length
;
11210 // If the unit could not be parsed, skip it.
11211 if (read_unit
.dwo_file
== NULL
)
11214 if (cus_htab
== NULL
)
11215 cus_htab
= allocate_dwo_unit_table ();
11217 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11218 *dwo_unit
= read_unit
;
11219 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11220 gdb_assert (slot
!= NULL
);
11223 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11224 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11226 complaint (_("debug cu entry at offset %s is duplicate to"
11227 " the entry at offset %s, signature %s"),
11228 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11229 hex_string (dwo_unit
->signature
));
11231 *slot
= (void *)dwo_unit
;
11235 /* DWP file .debug_{cu,tu}_index section format:
11236 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11240 Both index sections have the same format, and serve to map a 64-bit
11241 signature to a set of section numbers. Each section begins with a header,
11242 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11243 indexes, and a pool of 32-bit section numbers. The index sections will be
11244 aligned at 8-byte boundaries in the file.
11246 The index section header consists of:
11248 V, 32 bit version number
11250 N, 32 bit number of compilation units or type units in the index
11251 M, 32 bit number of slots in the hash table
11253 Numbers are recorded using the byte order of the application binary.
11255 The hash table begins at offset 16 in the section, and consists of an array
11256 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11257 order of the application binary). Unused slots in the hash table are 0.
11258 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11260 The parallel table begins immediately after the hash table
11261 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11262 array of 32-bit indexes (using the byte order of the application binary),
11263 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11264 table contains a 32-bit index into the pool of section numbers. For unused
11265 hash table slots, the corresponding entry in the parallel table will be 0.
11267 The pool of section numbers begins immediately following the hash table
11268 (at offset 16 + 12 * M from the beginning of the section). The pool of
11269 section numbers consists of an array of 32-bit words (using the byte order
11270 of the application binary). Each item in the array is indexed starting
11271 from 0. The hash table entry provides the index of the first section
11272 number in the set. Additional section numbers in the set follow, and the
11273 set is terminated by a 0 entry (section number 0 is not used in ELF).
11275 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11276 section must be the first entry in the set, and the .debug_abbrev.dwo must
11277 be the second entry. Other members of the set may follow in any order.
11283 DWP Version 2 combines all the .debug_info, etc. sections into one,
11284 and the entries in the index tables are now offsets into these sections.
11285 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11288 Index Section Contents:
11290 Hash Table of Signatures dwp_hash_table.hash_table
11291 Parallel Table of Indices dwp_hash_table.unit_table
11292 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11293 Table of Section Sizes dwp_hash_table.v2.sizes
11295 The index section header consists of:
11297 V, 32 bit version number
11298 L, 32 bit number of columns in the table of section offsets
11299 N, 32 bit number of compilation units or type units in the index
11300 M, 32 bit number of slots in the hash table
11302 Numbers are recorded using the byte order of the application binary.
11304 The hash table has the same format as version 1.
11305 The parallel table of indices has the same format as version 1,
11306 except that the entries are origin-1 indices into the table of sections
11307 offsets and the table of section sizes.
11309 The table of offsets begins immediately following the parallel table
11310 (at offset 16 + 12 * M from the beginning of the section). The table is
11311 a two-dimensional array of 32-bit words (using the byte order of the
11312 application binary), with L columns and N+1 rows, in row-major order.
11313 Each row in the array is indexed starting from 0. The first row provides
11314 a key to the remaining rows: each column in this row provides an identifier
11315 for a debug section, and the offsets in the same column of subsequent rows
11316 refer to that section. The section identifiers are:
11318 DW_SECT_INFO 1 .debug_info.dwo
11319 DW_SECT_TYPES 2 .debug_types.dwo
11320 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11321 DW_SECT_LINE 4 .debug_line.dwo
11322 DW_SECT_LOC 5 .debug_loc.dwo
11323 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11324 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11325 DW_SECT_MACRO 8 .debug_macro.dwo
11327 The offsets provided by the CU and TU index sections are the base offsets
11328 for the contributions made by each CU or TU to the corresponding section
11329 in the package file. Each CU and TU header contains an abbrev_offset
11330 field, used to find the abbreviations table for that CU or TU within the
11331 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11332 be interpreted as relative to the base offset given in the index section.
11333 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11334 should be interpreted as relative to the base offset for .debug_line.dwo,
11335 and offsets into other debug sections obtained from DWARF attributes should
11336 also be interpreted as relative to the corresponding base offset.
11338 The table of sizes begins immediately following the table of offsets.
11339 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11340 with L columns and N rows, in row-major order. Each row in the array is
11341 indexed starting from 1 (row 0 is shared by the two tables).
11345 Hash table lookup is handled the same in version 1 and 2:
11347 We assume that N and M will not exceed 2^32 - 1.
11348 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11350 Given a 64-bit compilation unit signature or a type signature S, an entry
11351 in the hash table is located as follows:
11353 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11354 the low-order k bits all set to 1.
11356 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11358 3) If the hash table entry at index H matches the signature, use that
11359 entry. If the hash table entry at index H is unused (all zeroes),
11360 terminate the search: the signature is not present in the table.
11362 4) Let H = (H + H') modulo M. Repeat at Step 3.
11364 Because M > N and H' and M are relatively prime, the search is guaranteed
11365 to stop at an unused slot or find the match. */
11367 /* Create a hash table to map DWO IDs to their CU/TU entry in
11368 .debug_{info,types}.dwo in DWP_FILE.
11369 Returns NULL if there isn't one.
11370 Note: This function processes DWP files only, not DWO files. */
11372 static struct dwp_hash_table
*
11373 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11374 struct dwp_file
*dwp_file
, int is_debug_types
)
11376 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11377 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11378 const gdb_byte
*index_ptr
, *index_end
;
11379 struct dwarf2_section_info
*index
;
11380 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11381 struct dwp_hash_table
*htab
;
11383 if (is_debug_types
)
11384 index
= &dwp_file
->sections
.tu_index
;
11386 index
= &dwp_file
->sections
.cu_index
;
11388 if (index
->empty ())
11390 index
->read (objfile
);
11392 index_ptr
= index
->buffer
;
11393 index_end
= index_ptr
+ index
->size
;
11395 version
= read_4_bytes (dbfd
, index_ptr
);
11398 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11402 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11404 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11407 if (version
!= 1 && version
!= 2)
11409 error (_("Dwarf Error: unsupported DWP file version (%s)"
11410 " [in module %s]"),
11411 pulongest (version
), dwp_file
->name
);
11413 if (nr_slots
!= (nr_slots
& -nr_slots
))
11415 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11416 " is not power of 2 [in module %s]"),
11417 pulongest (nr_slots
), dwp_file
->name
);
11420 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11421 htab
->version
= version
;
11422 htab
->nr_columns
= nr_columns
;
11423 htab
->nr_units
= nr_units
;
11424 htab
->nr_slots
= nr_slots
;
11425 htab
->hash_table
= index_ptr
;
11426 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11428 /* Exit early if the table is empty. */
11429 if (nr_slots
== 0 || nr_units
== 0
11430 || (version
== 2 && nr_columns
== 0))
11432 /* All must be zero. */
11433 if (nr_slots
!= 0 || nr_units
!= 0
11434 || (version
== 2 && nr_columns
!= 0))
11436 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11437 " all zero [in modules %s]"),
11445 htab
->section_pool
.v1
.indices
=
11446 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11447 /* It's harder to decide whether the section is too small in v1.
11448 V1 is deprecated anyway so we punt. */
11452 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11453 int *ids
= htab
->section_pool
.v2
.section_ids
;
11454 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11455 /* Reverse map for error checking. */
11456 int ids_seen
[DW_SECT_MAX
+ 1];
11459 if (nr_columns
< 2)
11461 error (_("Dwarf Error: bad DWP hash table, too few columns"
11462 " in section table [in module %s]"),
11465 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11467 error (_("Dwarf Error: bad DWP hash table, too many columns"
11468 " in section table [in module %s]"),
11471 memset (ids
, 255, sizeof_ids
);
11472 memset (ids_seen
, 255, sizeof (ids_seen
));
11473 for (i
= 0; i
< nr_columns
; ++i
)
11475 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11477 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11479 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11480 " in section table [in module %s]"),
11481 id
, dwp_file
->name
);
11483 if (ids_seen
[id
] != -1)
11485 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11486 " id %d in section table [in module %s]"),
11487 id
, dwp_file
->name
);
11492 /* Must have exactly one info or types section. */
11493 if (((ids_seen
[DW_SECT_INFO
] != -1)
11494 + (ids_seen
[DW_SECT_TYPES
] != -1))
11497 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11498 " DWO info/types section [in module %s]"),
11501 /* Must have an abbrev section. */
11502 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11504 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11505 " section [in module %s]"),
11508 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11509 htab
->section_pool
.v2
.sizes
=
11510 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11511 * nr_units
* nr_columns
);
11512 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11513 * nr_units
* nr_columns
))
11516 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11517 " [in module %s]"),
11525 /* Update SECTIONS with the data from SECTP.
11527 This function is like the other "locate" section routines that are
11528 passed to bfd_map_over_sections, but in this context the sections to
11529 read comes from the DWP V1 hash table, not the full ELF section table.
11531 The result is non-zero for success, or zero if an error was found. */
11534 locate_v1_virtual_dwo_sections (asection
*sectp
,
11535 struct virtual_v1_dwo_sections
*sections
)
11537 const struct dwop_section_names
*names
= &dwop_section_names
;
11539 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11541 /* There can be only one. */
11542 if (sections
->abbrev
.s
.section
!= NULL
)
11544 sections
->abbrev
.s
.section
= sectp
;
11545 sections
->abbrev
.size
= bfd_section_size (sectp
);
11547 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11548 || section_is_p (sectp
->name
, &names
->types_dwo
))
11550 /* There can be only one. */
11551 if (sections
->info_or_types
.s
.section
!= NULL
)
11553 sections
->info_or_types
.s
.section
= sectp
;
11554 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11556 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11558 /* There can be only one. */
11559 if (sections
->line
.s
.section
!= NULL
)
11561 sections
->line
.s
.section
= sectp
;
11562 sections
->line
.size
= bfd_section_size (sectp
);
11564 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11566 /* There can be only one. */
11567 if (sections
->loc
.s
.section
!= NULL
)
11569 sections
->loc
.s
.section
= sectp
;
11570 sections
->loc
.size
= bfd_section_size (sectp
);
11572 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11574 /* There can be only one. */
11575 if (sections
->macinfo
.s
.section
!= NULL
)
11577 sections
->macinfo
.s
.section
= sectp
;
11578 sections
->macinfo
.size
= bfd_section_size (sectp
);
11580 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11582 /* There can be only one. */
11583 if (sections
->macro
.s
.section
!= NULL
)
11585 sections
->macro
.s
.section
= sectp
;
11586 sections
->macro
.size
= bfd_section_size (sectp
);
11588 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11590 /* There can be only one. */
11591 if (sections
->str_offsets
.s
.section
!= NULL
)
11593 sections
->str_offsets
.s
.section
= sectp
;
11594 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11598 /* No other kind of section is valid. */
11605 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11606 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11607 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11608 This is for DWP version 1 files. */
11610 static struct dwo_unit
*
11611 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11612 struct dwp_file
*dwp_file
,
11613 uint32_t unit_index
,
11614 const char *comp_dir
,
11615 ULONGEST signature
, int is_debug_types
)
11617 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11618 const struct dwp_hash_table
*dwp_htab
=
11619 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11620 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11621 const char *kind
= is_debug_types
? "TU" : "CU";
11622 struct dwo_file
*dwo_file
;
11623 struct dwo_unit
*dwo_unit
;
11624 struct virtual_v1_dwo_sections sections
;
11625 void **dwo_file_slot
;
11628 gdb_assert (dwp_file
->version
== 1);
11630 if (dwarf_read_debug
)
11632 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11634 pulongest (unit_index
), hex_string (signature
),
11638 /* Fetch the sections of this DWO unit.
11639 Put a limit on the number of sections we look for so that bad data
11640 doesn't cause us to loop forever. */
11642 #define MAX_NR_V1_DWO_SECTIONS \
11643 (1 /* .debug_info or .debug_types */ \
11644 + 1 /* .debug_abbrev */ \
11645 + 1 /* .debug_line */ \
11646 + 1 /* .debug_loc */ \
11647 + 1 /* .debug_str_offsets */ \
11648 + 1 /* .debug_macro or .debug_macinfo */ \
11649 + 1 /* trailing zero */)
11651 memset (§ions
, 0, sizeof (sections
));
11653 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11656 uint32_t section_nr
=
11657 read_4_bytes (dbfd
,
11658 dwp_htab
->section_pool
.v1
.indices
11659 + (unit_index
+ i
) * sizeof (uint32_t));
11661 if (section_nr
== 0)
11663 if (section_nr
>= dwp_file
->num_sections
)
11665 error (_("Dwarf Error: bad DWP hash table, section number too large"
11666 " [in module %s]"),
11670 sectp
= dwp_file
->elf_sections
[section_nr
];
11671 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11673 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11674 " [in module %s]"),
11680 || sections
.info_or_types
.empty ()
11681 || sections
.abbrev
.empty ())
11683 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11684 " [in module %s]"),
11687 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11689 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11690 " [in module %s]"),
11694 /* It's easier for the rest of the code if we fake a struct dwo_file and
11695 have dwo_unit "live" in that. At least for now.
11697 The DWP file can be made up of a random collection of CUs and TUs.
11698 However, for each CU + set of TUs that came from the same original DWO
11699 file, we can combine them back into a virtual DWO file to save space
11700 (fewer struct dwo_file objects to allocate). Remember that for really
11701 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11703 std::string virtual_dwo_name
=
11704 string_printf ("virtual-dwo/%d-%d-%d-%d",
11705 sections
.abbrev
.get_id (),
11706 sections
.line
.get_id (),
11707 sections
.loc
.get_id (),
11708 sections
.str_offsets
.get_id ());
11709 /* Can we use an existing virtual DWO file? */
11710 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11711 virtual_dwo_name
.c_str (),
11713 /* Create one if necessary. */
11714 if (*dwo_file_slot
== NULL
)
11716 if (dwarf_read_debug
)
11718 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11719 virtual_dwo_name
.c_str ());
11721 dwo_file
= new struct dwo_file
;
11722 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11723 dwo_file
->comp_dir
= comp_dir
;
11724 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11725 dwo_file
->sections
.line
= sections
.line
;
11726 dwo_file
->sections
.loc
= sections
.loc
;
11727 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11728 dwo_file
->sections
.macro
= sections
.macro
;
11729 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11730 /* The "str" section is global to the entire DWP file. */
11731 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11732 /* The info or types section is assigned below to dwo_unit,
11733 there's no need to record it in dwo_file.
11734 Also, we can't simply record type sections in dwo_file because
11735 we record a pointer into the vector in dwo_unit. As we collect more
11736 types we'll grow the vector and eventually have to reallocate space
11737 for it, invalidating all copies of pointers into the previous
11739 *dwo_file_slot
= dwo_file
;
11743 if (dwarf_read_debug
)
11745 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11746 virtual_dwo_name
.c_str ());
11748 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11751 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11752 dwo_unit
->dwo_file
= dwo_file
;
11753 dwo_unit
->signature
= signature
;
11754 dwo_unit
->section
=
11755 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11756 *dwo_unit
->section
= sections
.info_or_types
;
11757 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11762 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11763 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11764 piece within that section used by a TU/CU, return a virtual section
11765 of just that piece. */
11767 static struct dwarf2_section_info
11768 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11769 struct dwarf2_section_info
*section
,
11770 bfd_size_type offset
, bfd_size_type size
)
11772 struct dwarf2_section_info result
;
11775 gdb_assert (section
!= NULL
);
11776 gdb_assert (!section
->is_virtual
);
11778 memset (&result
, 0, sizeof (result
));
11779 result
.s
.containing_section
= section
;
11780 result
.is_virtual
= true;
11785 sectp
= section
->get_bfd_section ();
11787 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11788 bounds of the real section. This is a pretty-rare event, so just
11789 flag an error (easier) instead of a warning and trying to cope. */
11791 || offset
+ size
> bfd_section_size (sectp
))
11793 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11794 " in section %s [in module %s]"),
11795 sectp
? bfd_section_name (sectp
) : "<unknown>",
11796 objfile_name (dwarf2_per_objfile
->objfile
));
11799 result
.virtual_offset
= offset
;
11800 result
.size
= size
;
11804 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11805 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11806 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11807 This is for DWP version 2 files. */
11809 static struct dwo_unit
*
11810 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11811 struct dwp_file
*dwp_file
,
11812 uint32_t unit_index
,
11813 const char *comp_dir
,
11814 ULONGEST signature
, int is_debug_types
)
11816 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11817 const struct dwp_hash_table
*dwp_htab
=
11818 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11819 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11820 const char *kind
= is_debug_types
? "TU" : "CU";
11821 struct dwo_file
*dwo_file
;
11822 struct dwo_unit
*dwo_unit
;
11823 struct virtual_v2_dwo_sections sections
;
11824 void **dwo_file_slot
;
11827 gdb_assert (dwp_file
->version
== 2);
11829 if (dwarf_read_debug
)
11831 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11833 pulongest (unit_index
), hex_string (signature
),
11837 /* Fetch the section offsets of this DWO unit. */
11839 memset (§ions
, 0, sizeof (sections
));
11841 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11843 uint32_t offset
= read_4_bytes (dbfd
,
11844 dwp_htab
->section_pool
.v2
.offsets
11845 + (((unit_index
- 1) * dwp_htab
->nr_columns
11847 * sizeof (uint32_t)));
11848 uint32_t size
= read_4_bytes (dbfd
,
11849 dwp_htab
->section_pool
.v2
.sizes
11850 + (((unit_index
- 1) * dwp_htab
->nr_columns
11852 * sizeof (uint32_t)));
11854 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11857 case DW_SECT_TYPES
:
11858 sections
.info_or_types_offset
= offset
;
11859 sections
.info_or_types_size
= size
;
11861 case DW_SECT_ABBREV
:
11862 sections
.abbrev_offset
= offset
;
11863 sections
.abbrev_size
= size
;
11866 sections
.line_offset
= offset
;
11867 sections
.line_size
= size
;
11870 sections
.loc_offset
= offset
;
11871 sections
.loc_size
= size
;
11873 case DW_SECT_STR_OFFSETS
:
11874 sections
.str_offsets_offset
= offset
;
11875 sections
.str_offsets_size
= size
;
11877 case DW_SECT_MACINFO
:
11878 sections
.macinfo_offset
= offset
;
11879 sections
.macinfo_size
= size
;
11881 case DW_SECT_MACRO
:
11882 sections
.macro_offset
= offset
;
11883 sections
.macro_size
= size
;
11888 /* It's easier for the rest of the code if we fake a struct dwo_file and
11889 have dwo_unit "live" in that. At least for now.
11891 The DWP file can be made up of a random collection of CUs and TUs.
11892 However, for each CU + set of TUs that came from the same original DWO
11893 file, we can combine them back into a virtual DWO file to save space
11894 (fewer struct dwo_file objects to allocate). Remember that for really
11895 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11897 std::string virtual_dwo_name
=
11898 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11899 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11900 (long) (sections
.line_size
? sections
.line_offset
: 0),
11901 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11902 (long) (sections
.str_offsets_size
11903 ? sections
.str_offsets_offset
: 0));
11904 /* Can we use an existing virtual DWO file? */
11905 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11906 virtual_dwo_name
.c_str (),
11908 /* Create one if necessary. */
11909 if (*dwo_file_slot
== NULL
)
11911 if (dwarf_read_debug
)
11913 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11914 virtual_dwo_name
.c_str ());
11916 dwo_file
= new struct dwo_file
;
11917 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11918 dwo_file
->comp_dir
= comp_dir
;
11919 dwo_file
->sections
.abbrev
=
11920 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11921 sections
.abbrev_offset
, sections
.abbrev_size
);
11922 dwo_file
->sections
.line
=
11923 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
11924 sections
.line_offset
, sections
.line_size
);
11925 dwo_file
->sections
.loc
=
11926 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
11927 sections
.loc_offset
, sections
.loc_size
);
11928 dwo_file
->sections
.macinfo
=
11929 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
11930 sections
.macinfo_offset
, sections
.macinfo_size
);
11931 dwo_file
->sections
.macro
=
11932 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
11933 sections
.macro_offset
, sections
.macro_size
);
11934 dwo_file
->sections
.str_offsets
=
11935 create_dwp_v2_section (dwarf2_per_objfile
,
11936 &dwp_file
->sections
.str_offsets
,
11937 sections
.str_offsets_offset
,
11938 sections
.str_offsets_size
);
11939 /* The "str" section is global to the entire DWP file. */
11940 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11941 /* The info or types section is assigned below to dwo_unit,
11942 there's no need to record it in dwo_file.
11943 Also, we can't simply record type sections in dwo_file because
11944 we record a pointer into the vector in dwo_unit. As we collect more
11945 types we'll grow the vector and eventually have to reallocate space
11946 for it, invalidating all copies of pointers into the previous
11948 *dwo_file_slot
= dwo_file
;
11952 if (dwarf_read_debug
)
11954 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11955 virtual_dwo_name
.c_str ());
11957 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11960 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11961 dwo_unit
->dwo_file
= dwo_file
;
11962 dwo_unit
->signature
= signature
;
11963 dwo_unit
->section
=
11964 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11965 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
11967 ? &dwp_file
->sections
.types
11968 : &dwp_file
->sections
.info
,
11969 sections
.info_or_types_offset
,
11970 sections
.info_or_types_size
);
11971 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11976 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
11977 Returns NULL if the signature isn't found. */
11979 static struct dwo_unit
*
11980 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11981 struct dwp_file
*dwp_file
, const char *comp_dir
,
11982 ULONGEST signature
, int is_debug_types
)
11984 const struct dwp_hash_table
*dwp_htab
=
11985 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11986 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11987 uint32_t mask
= dwp_htab
->nr_slots
- 1;
11988 uint32_t hash
= signature
& mask
;
11989 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
11992 struct dwo_unit find_dwo_cu
;
11994 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
11995 find_dwo_cu
.signature
= signature
;
11996 slot
= htab_find_slot (is_debug_types
11997 ? dwp_file
->loaded_tus
.get ()
11998 : dwp_file
->loaded_cus
.get (),
11999 &find_dwo_cu
, INSERT
);
12002 return (struct dwo_unit
*) *slot
;
12004 /* Use a for loop so that we don't loop forever on bad debug info. */
12005 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12007 ULONGEST signature_in_table
;
12009 signature_in_table
=
12010 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12011 if (signature_in_table
== signature
)
12013 uint32_t unit_index
=
12014 read_4_bytes (dbfd
,
12015 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12017 if (dwp_file
->version
== 1)
12019 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12020 dwp_file
, unit_index
,
12021 comp_dir
, signature
,
12026 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12027 dwp_file
, unit_index
,
12028 comp_dir
, signature
,
12031 return (struct dwo_unit
*) *slot
;
12033 if (signature_in_table
== 0)
12035 hash
= (hash
+ hash2
) & mask
;
12038 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12039 " [in module %s]"),
12043 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12044 Open the file specified by FILE_NAME and hand it off to BFD for
12045 preliminary analysis. Return a newly initialized bfd *, which
12046 includes a canonicalized copy of FILE_NAME.
12047 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12048 SEARCH_CWD is true if the current directory is to be searched.
12049 It will be searched before debug-file-directory.
12050 If successful, the file is added to the bfd include table of the
12051 objfile's bfd (see gdb_bfd_record_inclusion).
12052 If unable to find/open the file, return NULL.
12053 NOTE: This function is derived from symfile_bfd_open. */
12055 static gdb_bfd_ref_ptr
12056 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12057 const char *file_name
, int is_dwp
, int search_cwd
)
12060 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12061 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12062 to debug_file_directory. */
12063 const char *search_path
;
12064 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12066 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12069 if (*debug_file_directory
!= '\0')
12071 search_path_holder
.reset (concat (".", dirname_separator_string
,
12072 debug_file_directory
,
12074 search_path
= search_path_holder
.get ();
12080 search_path
= debug_file_directory
;
12082 openp_flags flags
= OPF_RETURN_REALPATH
;
12084 flags
|= OPF_SEARCH_IN_PATH
;
12086 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12087 desc
= openp (search_path
, flags
, file_name
,
12088 O_RDONLY
| O_BINARY
, &absolute_name
);
12092 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12094 if (sym_bfd
== NULL
)
12096 bfd_set_cacheable (sym_bfd
.get (), 1);
12098 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12101 /* Success. Record the bfd as having been included by the objfile's bfd.
12102 This is important because things like demangled_names_hash lives in the
12103 objfile's per_bfd space and may have references to things like symbol
12104 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12105 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12110 /* Try to open DWO file FILE_NAME.
12111 COMP_DIR is the DW_AT_comp_dir attribute.
12112 The result is the bfd handle of the file.
12113 If there is a problem finding or opening the file, return NULL.
12114 Upon success, the canonicalized path of the file is stored in the bfd,
12115 same as symfile_bfd_open. */
12117 static gdb_bfd_ref_ptr
12118 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12119 const char *file_name
, const char *comp_dir
)
12121 if (IS_ABSOLUTE_PATH (file_name
))
12122 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12123 0 /*is_dwp*/, 0 /*search_cwd*/);
12125 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12127 if (comp_dir
!= NULL
)
12129 gdb::unique_xmalloc_ptr
<char> path_to_try
12130 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12132 /* NOTE: If comp_dir is a relative path, this will also try the
12133 search path, which seems useful. */
12134 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12135 path_to_try
.get (),
12137 1 /*search_cwd*/));
12142 /* That didn't work, try debug-file-directory, which, despite its name,
12143 is a list of paths. */
12145 if (*debug_file_directory
== '\0')
12148 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12149 0 /*is_dwp*/, 1 /*search_cwd*/);
12152 /* This function is mapped across the sections and remembers the offset and
12153 size of each of the DWO debugging sections we are interested in. */
12156 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12158 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12159 const struct dwop_section_names
*names
= &dwop_section_names
;
12161 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12163 dwo_sections
->abbrev
.s
.section
= sectp
;
12164 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12166 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12168 dwo_sections
->info
.s
.section
= sectp
;
12169 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12171 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12173 dwo_sections
->line
.s
.section
= sectp
;
12174 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12176 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12178 dwo_sections
->loc
.s
.section
= sectp
;
12179 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12181 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12183 dwo_sections
->loclists
.s
.section
= sectp
;
12184 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12186 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12188 dwo_sections
->macinfo
.s
.section
= sectp
;
12189 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12191 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12193 dwo_sections
->macro
.s
.section
= sectp
;
12194 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12196 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12198 dwo_sections
->str
.s
.section
= sectp
;
12199 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12201 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12203 dwo_sections
->str_offsets
.s
.section
= sectp
;
12204 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12206 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12208 struct dwarf2_section_info type_section
;
12210 memset (&type_section
, 0, sizeof (type_section
));
12211 type_section
.s
.section
= sectp
;
12212 type_section
.size
= bfd_section_size (sectp
);
12213 dwo_sections
->types
.push_back (type_section
);
12217 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12218 by PER_CU. This is for the non-DWP case.
12219 The result is NULL if DWO_NAME can't be found. */
12221 static struct dwo_file
*
12222 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12223 const char *dwo_name
, const char *comp_dir
)
12225 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12227 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12230 if (dwarf_read_debug
)
12231 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12235 dwo_file_up
dwo_file (new struct dwo_file
);
12236 dwo_file
->dwo_name
= dwo_name
;
12237 dwo_file
->comp_dir
= comp_dir
;
12238 dwo_file
->dbfd
= std::move (dbfd
);
12240 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12241 &dwo_file
->sections
);
12243 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12244 dwo_file
->sections
.info
, dwo_file
->cus
);
12246 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12247 dwo_file
->sections
.types
, dwo_file
->tus
);
12249 if (dwarf_read_debug
)
12250 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12252 return dwo_file
.release ();
12255 /* This function is mapped across the sections and remembers the offset and
12256 size of each of the DWP debugging sections common to version 1 and 2 that
12257 we are interested in. */
12260 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12261 void *dwp_file_ptr
)
12263 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12264 const struct dwop_section_names
*names
= &dwop_section_names
;
12265 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12267 /* Record the ELF section number for later lookup: this is what the
12268 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12269 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12270 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12272 /* Look for specific sections that we need. */
12273 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12275 dwp_file
->sections
.str
.s
.section
= sectp
;
12276 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12278 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12280 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12281 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12283 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12285 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12286 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12290 /* This function is mapped across the sections and remembers the offset and
12291 size of each of the DWP version 2 debugging sections that we are interested
12292 in. This is split into a separate function because we don't know if we
12293 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12296 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12298 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12299 const struct dwop_section_names
*names
= &dwop_section_names
;
12300 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12302 /* Record the ELF section number for later lookup: this is what the
12303 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12304 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12305 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12307 /* Look for specific sections that we need. */
12308 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12310 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12311 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12313 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12315 dwp_file
->sections
.info
.s
.section
= sectp
;
12316 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12318 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12320 dwp_file
->sections
.line
.s
.section
= sectp
;
12321 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12323 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12325 dwp_file
->sections
.loc
.s
.section
= sectp
;
12326 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12328 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12330 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12331 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12333 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12335 dwp_file
->sections
.macro
.s
.section
= sectp
;
12336 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12338 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12340 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12341 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12343 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12345 dwp_file
->sections
.types
.s
.section
= sectp
;
12346 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12350 /* Hash function for dwp_file loaded CUs/TUs. */
12353 hash_dwp_loaded_cutus (const void *item
)
12355 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12357 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12358 return dwo_unit
->signature
;
12361 /* Equality function for dwp_file loaded CUs/TUs. */
12364 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12366 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12367 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12369 return dua
->signature
== dub
->signature
;
12372 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12375 allocate_dwp_loaded_cutus_table ()
12377 return htab_up (htab_create_alloc (3,
12378 hash_dwp_loaded_cutus
,
12379 eq_dwp_loaded_cutus
,
12380 NULL
, xcalloc
, xfree
));
12383 /* Try to open DWP file FILE_NAME.
12384 The result is the bfd handle of the file.
12385 If there is a problem finding or opening the file, return NULL.
12386 Upon success, the canonicalized path of the file is stored in the bfd,
12387 same as symfile_bfd_open. */
12389 static gdb_bfd_ref_ptr
12390 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12391 const char *file_name
)
12393 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12395 1 /*search_cwd*/));
12399 /* Work around upstream bug 15652.
12400 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12401 [Whether that's a "bug" is debatable, but it is getting in our way.]
12402 We have no real idea where the dwp file is, because gdb's realpath-ing
12403 of the executable's path may have discarded the needed info.
12404 [IWBN if the dwp file name was recorded in the executable, akin to
12405 .gnu_debuglink, but that doesn't exist yet.]
12406 Strip the directory from FILE_NAME and search again. */
12407 if (*debug_file_directory
!= '\0')
12409 /* Don't implicitly search the current directory here.
12410 If the user wants to search "." to handle this case,
12411 it must be added to debug-file-directory. */
12412 return try_open_dwop_file (dwarf2_per_objfile
,
12413 lbasename (file_name
), 1 /*is_dwp*/,
12420 /* Initialize the use of the DWP file for the current objfile.
12421 By convention the name of the DWP file is ${objfile}.dwp.
12422 The result is NULL if it can't be found. */
12424 static std::unique_ptr
<struct dwp_file
>
12425 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12427 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12429 /* Try to find first .dwp for the binary file before any symbolic links
12432 /* If the objfile is a debug file, find the name of the real binary
12433 file and get the name of dwp file from there. */
12434 std::string dwp_name
;
12435 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12437 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12438 const char *backlink_basename
= lbasename (backlink
->original_name
);
12440 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12443 dwp_name
= objfile
->original_name
;
12445 dwp_name
+= ".dwp";
12447 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12449 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12451 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12452 dwp_name
= objfile_name (objfile
);
12453 dwp_name
+= ".dwp";
12454 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12459 if (dwarf_read_debug
)
12460 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12461 return std::unique_ptr
<dwp_file
> ();
12464 const char *name
= bfd_get_filename (dbfd
.get ());
12465 std::unique_ptr
<struct dwp_file
> dwp_file
12466 (new struct dwp_file (name
, std::move (dbfd
)));
12468 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12469 dwp_file
->elf_sections
=
12470 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12471 dwp_file
->num_sections
, asection
*);
12473 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12474 dwarf2_locate_common_dwp_sections
,
12477 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12480 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12483 /* The DWP file version is stored in the hash table. Oh well. */
12484 if (dwp_file
->cus
&& dwp_file
->tus
12485 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12487 /* Technically speaking, we should try to limp along, but this is
12488 pretty bizarre. We use pulongest here because that's the established
12489 portability solution (e.g, we cannot use %u for uint32_t). */
12490 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12491 " TU version %s [in DWP file %s]"),
12492 pulongest (dwp_file
->cus
->version
),
12493 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12497 dwp_file
->version
= dwp_file
->cus
->version
;
12498 else if (dwp_file
->tus
)
12499 dwp_file
->version
= dwp_file
->tus
->version
;
12501 dwp_file
->version
= 2;
12503 if (dwp_file
->version
== 2)
12504 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12505 dwarf2_locate_v2_dwp_sections
,
12508 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12509 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12511 if (dwarf_read_debug
)
12513 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12514 fprintf_unfiltered (gdb_stdlog
,
12515 " %s CUs, %s TUs\n",
12516 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12517 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12523 /* Wrapper around open_and_init_dwp_file, only open it once. */
12525 static struct dwp_file
*
12526 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12528 if (! dwarf2_per_objfile
->dwp_checked
)
12530 dwarf2_per_objfile
->dwp_file
12531 = open_and_init_dwp_file (dwarf2_per_objfile
);
12532 dwarf2_per_objfile
->dwp_checked
= 1;
12534 return dwarf2_per_objfile
->dwp_file
.get ();
12537 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12538 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12539 or in the DWP file for the objfile, referenced by THIS_UNIT.
12540 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12541 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12543 This is called, for example, when wanting to read a variable with a
12544 complex location. Therefore we don't want to do file i/o for every call.
12545 Therefore we don't want to look for a DWO file on every call.
12546 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12547 then we check if we've already seen DWO_NAME, and only THEN do we check
12550 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12551 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12553 static struct dwo_unit
*
12554 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12555 const char *dwo_name
, const char *comp_dir
,
12556 ULONGEST signature
, int is_debug_types
)
12558 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12559 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12560 const char *kind
= is_debug_types
? "TU" : "CU";
12561 void **dwo_file_slot
;
12562 struct dwo_file
*dwo_file
;
12563 struct dwp_file
*dwp_file
;
12565 /* First see if there's a DWP file.
12566 If we have a DWP file but didn't find the DWO inside it, don't
12567 look for the original DWO file. It makes gdb behave differently
12568 depending on whether one is debugging in the build tree. */
12570 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12571 if (dwp_file
!= NULL
)
12573 const struct dwp_hash_table
*dwp_htab
=
12574 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12576 if (dwp_htab
!= NULL
)
12578 struct dwo_unit
*dwo_cutu
=
12579 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12580 signature
, is_debug_types
);
12582 if (dwo_cutu
!= NULL
)
12584 if (dwarf_read_debug
)
12586 fprintf_unfiltered (gdb_stdlog
,
12587 "Virtual DWO %s %s found: @%s\n",
12588 kind
, hex_string (signature
),
12589 host_address_to_string (dwo_cutu
));
12597 /* No DWP file, look for the DWO file. */
12599 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12600 dwo_name
, comp_dir
);
12601 if (*dwo_file_slot
== NULL
)
12603 /* Read in the file and build a table of the CUs/TUs it contains. */
12604 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12606 /* NOTE: This will be NULL if unable to open the file. */
12607 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12609 if (dwo_file
!= NULL
)
12611 struct dwo_unit
*dwo_cutu
= NULL
;
12613 if (is_debug_types
&& dwo_file
->tus
)
12615 struct dwo_unit find_dwo_cutu
;
12617 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12618 find_dwo_cutu
.signature
= signature
;
12620 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12623 else if (!is_debug_types
&& dwo_file
->cus
)
12625 struct dwo_unit find_dwo_cutu
;
12627 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12628 find_dwo_cutu
.signature
= signature
;
12629 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12633 if (dwo_cutu
!= NULL
)
12635 if (dwarf_read_debug
)
12637 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12638 kind
, dwo_name
, hex_string (signature
),
12639 host_address_to_string (dwo_cutu
));
12646 /* We didn't find it. This could mean a dwo_id mismatch, or
12647 someone deleted the DWO/DWP file, or the search path isn't set up
12648 correctly to find the file. */
12650 if (dwarf_read_debug
)
12652 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12653 kind
, dwo_name
, hex_string (signature
));
12656 /* This is a warning and not a complaint because it can be caused by
12657 pilot error (e.g., user accidentally deleting the DWO). */
12659 /* Print the name of the DWP file if we looked there, helps the user
12660 better diagnose the problem. */
12661 std::string dwp_text
;
12663 if (dwp_file
!= NULL
)
12664 dwp_text
= string_printf (" [in DWP file %s]",
12665 lbasename (dwp_file
->name
));
12667 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12668 " [in module %s]"),
12669 kind
, dwo_name
, hex_string (signature
),
12671 this_unit
->is_debug_types
? "TU" : "CU",
12672 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12677 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12678 See lookup_dwo_cutu_unit for details. */
12680 static struct dwo_unit
*
12681 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12682 const char *dwo_name
, const char *comp_dir
,
12683 ULONGEST signature
)
12685 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12688 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12689 See lookup_dwo_cutu_unit for details. */
12691 static struct dwo_unit
*
12692 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12693 const char *dwo_name
, const char *comp_dir
)
12695 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12698 /* Traversal function for queue_and_load_all_dwo_tus. */
12701 queue_and_load_dwo_tu (void **slot
, void *info
)
12703 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12704 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12705 ULONGEST signature
= dwo_unit
->signature
;
12706 struct signatured_type
*sig_type
=
12707 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12709 if (sig_type
!= NULL
)
12711 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12713 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12714 a real dependency of PER_CU on SIG_TYPE. That is detected later
12715 while processing PER_CU. */
12716 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12717 load_full_type_unit (sig_cu
);
12718 per_cu
->imported_symtabs_push (sig_cu
);
12724 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12725 The DWO may have the only definition of the type, though it may not be
12726 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12727 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12730 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12732 struct dwo_unit
*dwo_unit
;
12733 struct dwo_file
*dwo_file
;
12735 gdb_assert (!per_cu
->is_debug_types
);
12736 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12737 gdb_assert (per_cu
->cu
!= NULL
);
12739 dwo_unit
= per_cu
->cu
->dwo_unit
;
12740 gdb_assert (dwo_unit
!= NULL
);
12742 dwo_file
= dwo_unit
->dwo_file
;
12743 if (dwo_file
->tus
!= NULL
)
12744 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12748 /* Read in various DIEs. */
12750 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12751 Inherit only the children of the DW_AT_abstract_origin DIE not being
12752 already referenced by DW_AT_abstract_origin from the children of the
12756 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12758 struct die_info
*child_die
;
12759 sect_offset
*offsetp
;
12760 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12761 struct die_info
*origin_die
;
12762 /* Iterator of the ORIGIN_DIE children. */
12763 struct die_info
*origin_child_die
;
12764 struct attribute
*attr
;
12765 struct dwarf2_cu
*origin_cu
;
12766 struct pending
**origin_previous_list_in_scope
;
12768 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12772 /* Note that following die references may follow to a die in a
12776 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12778 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12780 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12781 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12783 if (die
->tag
!= origin_die
->tag
12784 && !(die
->tag
== DW_TAG_inlined_subroutine
12785 && origin_die
->tag
== DW_TAG_subprogram
))
12786 complaint (_("DIE %s and its abstract origin %s have different tags"),
12787 sect_offset_str (die
->sect_off
),
12788 sect_offset_str (origin_die
->sect_off
));
12790 std::vector
<sect_offset
> offsets
;
12792 for (child_die
= die
->child
;
12793 child_die
&& child_die
->tag
;
12794 child_die
= child_die
->sibling
)
12796 struct die_info
*child_origin_die
;
12797 struct dwarf2_cu
*child_origin_cu
;
12799 /* We are trying to process concrete instance entries:
12800 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12801 it's not relevant to our analysis here. i.e. detecting DIEs that are
12802 present in the abstract instance but not referenced in the concrete
12804 if (child_die
->tag
== DW_TAG_call_site
12805 || child_die
->tag
== DW_TAG_GNU_call_site
)
12808 /* For each CHILD_DIE, find the corresponding child of
12809 ORIGIN_DIE. If there is more than one layer of
12810 DW_AT_abstract_origin, follow them all; there shouldn't be,
12811 but GCC versions at least through 4.4 generate this (GCC PR
12813 child_origin_die
= child_die
;
12814 child_origin_cu
= cu
;
12817 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12821 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12825 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12826 counterpart may exist. */
12827 if (child_origin_die
!= child_die
)
12829 if (child_die
->tag
!= child_origin_die
->tag
12830 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12831 && child_origin_die
->tag
== DW_TAG_subprogram
))
12832 complaint (_("Child DIE %s and its abstract origin %s have "
12834 sect_offset_str (child_die
->sect_off
),
12835 sect_offset_str (child_origin_die
->sect_off
));
12836 if (child_origin_die
->parent
!= origin_die
)
12837 complaint (_("Child DIE %s and its abstract origin %s have "
12838 "different parents"),
12839 sect_offset_str (child_die
->sect_off
),
12840 sect_offset_str (child_origin_die
->sect_off
));
12842 offsets
.push_back (child_origin_die
->sect_off
);
12845 std::sort (offsets
.begin (), offsets
.end ());
12846 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12847 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12848 if (offsetp
[-1] == *offsetp
)
12849 complaint (_("Multiple children of DIE %s refer "
12850 "to DIE %s as their abstract origin"),
12851 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12853 offsetp
= offsets
.data ();
12854 origin_child_die
= origin_die
->child
;
12855 while (origin_child_die
&& origin_child_die
->tag
)
12857 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12858 while (offsetp
< offsets_end
12859 && *offsetp
< origin_child_die
->sect_off
)
12861 if (offsetp
>= offsets_end
12862 || *offsetp
> origin_child_die
->sect_off
)
12864 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12865 Check whether we're already processing ORIGIN_CHILD_DIE.
12866 This can happen with mutually referenced abstract_origins.
12868 if (!origin_child_die
->in_process
)
12869 process_die (origin_child_die
, origin_cu
);
12871 origin_child_die
= origin_child_die
->sibling
;
12873 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12875 if (cu
!= origin_cu
)
12876 compute_delayed_physnames (origin_cu
);
12880 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12882 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12883 struct gdbarch
*gdbarch
= objfile
->arch ();
12884 struct context_stack
*newobj
;
12887 struct die_info
*child_die
;
12888 struct attribute
*attr
, *call_line
, *call_file
;
12890 CORE_ADDR baseaddr
;
12891 struct block
*block
;
12892 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12893 std::vector
<struct symbol
*> template_args
;
12894 struct template_symbol
*templ_func
= NULL
;
12898 /* If we do not have call site information, we can't show the
12899 caller of this inlined function. That's too confusing, so
12900 only use the scope for local variables. */
12901 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12902 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12903 if (call_line
== NULL
|| call_file
== NULL
)
12905 read_lexical_block_scope (die
, cu
);
12910 baseaddr
= objfile
->text_section_offset ();
12912 name
= dwarf2_name (die
, cu
);
12914 /* Ignore functions with missing or empty names. These are actually
12915 illegal according to the DWARF standard. */
12918 complaint (_("missing name for subprogram DIE at %s"),
12919 sect_offset_str (die
->sect_off
));
12923 /* Ignore functions with missing or invalid low and high pc attributes. */
12924 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12925 <= PC_BOUNDS_INVALID
)
12927 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12928 if (!attr
|| !DW_UNSND (attr
))
12929 complaint (_("cannot get low and high bounds "
12930 "for subprogram DIE at %s"),
12931 sect_offset_str (die
->sect_off
));
12935 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12936 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12938 /* If we have any template arguments, then we must allocate a
12939 different sort of symbol. */
12940 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
12942 if (child_die
->tag
== DW_TAG_template_type_param
12943 || child_die
->tag
== DW_TAG_template_value_param
)
12945 templ_func
= allocate_template_symbol (objfile
);
12946 templ_func
->subclass
= SYMBOL_TEMPLATE
;
12951 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
12952 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
12953 (struct symbol
*) templ_func
);
12955 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
12956 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
12959 /* If there is a location expression for DW_AT_frame_base, record
12961 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
12962 if (attr
!= nullptr)
12963 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
12965 /* If there is a location for the static link, record it. */
12966 newobj
->static_link
= NULL
;
12967 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
12968 if (attr
!= nullptr)
12970 newobj
->static_link
12971 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
12972 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
12973 cu
->per_cu
->addr_type ());
12976 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
12978 if (die
->child
!= NULL
)
12980 child_die
= die
->child
;
12981 while (child_die
&& child_die
->tag
)
12983 if (child_die
->tag
== DW_TAG_template_type_param
12984 || child_die
->tag
== DW_TAG_template_value_param
)
12986 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12989 template_args
.push_back (arg
);
12992 process_die (child_die
, cu
);
12993 child_die
= child_die
->sibling
;
12997 inherit_abstract_dies (die
, cu
);
12999 /* If we have a DW_AT_specification, we might need to import using
13000 directives from the context of the specification DIE. See the
13001 comment in determine_prefix. */
13002 if (cu
->language
== language_cplus
13003 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13005 struct dwarf2_cu
*spec_cu
= cu
;
13006 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13010 child_die
= spec_die
->child
;
13011 while (child_die
&& child_die
->tag
)
13013 if (child_die
->tag
== DW_TAG_imported_module
)
13014 process_die (child_die
, spec_cu
);
13015 child_die
= child_die
->sibling
;
13018 /* In some cases, GCC generates specification DIEs that
13019 themselves contain DW_AT_specification attributes. */
13020 spec_die
= die_specification (spec_die
, &spec_cu
);
13024 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13025 /* Make a block for the local symbols within. */
13026 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13027 cstk
.static_link
, lowpc
, highpc
);
13029 /* For C++, set the block's scope. */
13030 if ((cu
->language
== language_cplus
13031 || cu
->language
== language_fortran
13032 || cu
->language
== language_d
13033 || cu
->language
== language_rust
)
13034 && cu
->processing_has_namespace_info
)
13035 block_set_scope (block
, determine_prefix (die
, cu
),
13036 &objfile
->objfile_obstack
);
13038 /* If we have address ranges, record them. */
13039 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13041 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13043 /* Attach template arguments to function. */
13044 if (!template_args
.empty ())
13046 gdb_assert (templ_func
!= NULL
);
13048 templ_func
->n_template_arguments
= template_args
.size ();
13049 templ_func
->template_arguments
13050 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13051 templ_func
->n_template_arguments
);
13052 memcpy (templ_func
->template_arguments
,
13053 template_args
.data (),
13054 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13056 /* Make sure that the symtab is set on the new symbols. Even
13057 though they don't appear in this symtab directly, other parts
13058 of gdb assume that symbols do, and this is reasonably
13060 for (symbol
*sym
: template_args
)
13061 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13064 /* In C++, we can have functions nested inside functions (e.g., when
13065 a function declares a class that has methods). This means that
13066 when we finish processing a function scope, we may need to go
13067 back to building a containing block's symbol lists. */
13068 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13069 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13071 /* If we've finished processing a top-level function, subsequent
13072 symbols go in the file symbol list. */
13073 if (cu
->get_builder ()->outermost_context_p ())
13074 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13077 /* Process all the DIES contained within a lexical block scope. Start
13078 a new scope, process the dies, and then close the scope. */
13081 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13083 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13084 struct gdbarch
*gdbarch
= objfile
->arch ();
13085 CORE_ADDR lowpc
, highpc
;
13086 struct die_info
*child_die
;
13087 CORE_ADDR baseaddr
;
13089 baseaddr
= objfile
->text_section_offset ();
13091 /* Ignore blocks with missing or invalid low and high pc attributes. */
13092 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13093 as multiple lexical blocks? Handling children in a sane way would
13094 be nasty. Might be easier to properly extend generic blocks to
13095 describe ranges. */
13096 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13098 case PC_BOUNDS_NOT_PRESENT
:
13099 /* DW_TAG_lexical_block has no attributes, process its children as if
13100 there was no wrapping by that DW_TAG_lexical_block.
13101 GCC does no longer produces such DWARF since GCC r224161. */
13102 for (child_die
= die
->child
;
13103 child_die
!= NULL
&& child_die
->tag
;
13104 child_die
= child_die
->sibling
)
13105 process_die (child_die
, cu
);
13107 case PC_BOUNDS_INVALID
:
13110 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13111 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13113 cu
->get_builder ()->push_context (0, lowpc
);
13114 if (die
->child
!= NULL
)
13116 child_die
= die
->child
;
13117 while (child_die
&& child_die
->tag
)
13119 process_die (child_die
, cu
);
13120 child_die
= child_die
->sibling
;
13123 inherit_abstract_dies (die
, cu
);
13124 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13126 if (*cu
->get_builder ()->get_local_symbols () != NULL
13127 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13129 struct block
*block
13130 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13131 cstk
.start_addr
, highpc
);
13133 /* Note that recording ranges after traversing children, as we
13134 do here, means that recording a parent's ranges entails
13135 walking across all its children's ranges as they appear in
13136 the address map, which is quadratic behavior.
13138 It would be nicer to record the parent's ranges before
13139 traversing its children, simply overriding whatever you find
13140 there. But since we don't even decide whether to create a
13141 block until after we've traversed its children, that's hard
13143 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13145 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13146 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13149 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13152 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13154 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13155 struct gdbarch
*gdbarch
= objfile
->arch ();
13156 CORE_ADDR pc
, baseaddr
;
13157 struct attribute
*attr
;
13158 struct call_site
*call_site
, call_site_local
;
13161 struct die_info
*child_die
;
13163 baseaddr
= objfile
->text_section_offset ();
13165 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13168 /* This was a pre-DWARF-5 GNU extension alias
13169 for DW_AT_call_return_pc. */
13170 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13174 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13175 "DIE %s [in module %s]"),
13176 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13179 pc
= attr
->value_as_address () + baseaddr
;
13180 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13182 if (cu
->call_site_htab
== NULL
)
13183 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13184 NULL
, &objfile
->objfile_obstack
,
13185 hashtab_obstack_allocate
, NULL
);
13186 call_site_local
.pc
= pc
;
13187 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13190 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13191 "DIE %s [in module %s]"),
13192 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13193 objfile_name (objfile
));
13197 /* Count parameters at the caller. */
13200 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13201 child_die
= child_die
->sibling
)
13203 if (child_die
->tag
!= DW_TAG_call_site_parameter
13204 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13206 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13207 "DW_TAG_call_site child DIE %s [in module %s]"),
13208 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13209 objfile_name (objfile
));
13217 = ((struct call_site
*)
13218 obstack_alloc (&objfile
->objfile_obstack
,
13219 sizeof (*call_site
)
13220 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13222 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13223 call_site
->pc
= pc
;
13225 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13226 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13228 struct die_info
*func_die
;
13230 /* Skip also over DW_TAG_inlined_subroutine. */
13231 for (func_die
= die
->parent
;
13232 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13233 && func_die
->tag
!= DW_TAG_subroutine_type
;
13234 func_die
= func_die
->parent
);
13236 /* DW_AT_call_all_calls is a superset
13237 of DW_AT_call_all_tail_calls. */
13239 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13240 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13241 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13242 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13244 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13245 not complete. But keep CALL_SITE for look ups via call_site_htab,
13246 both the initial caller containing the real return address PC and
13247 the final callee containing the current PC of a chain of tail
13248 calls do not need to have the tail call list complete. But any
13249 function candidate for a virtual tail call frame searched via
13250 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13251 determined unambiguously. */
13255 struct type
*func_type
= NULL
;
13258 func_type
= get_die_type (func_die
, cu
);
13259 if (func_type
!= NULL
)
13261 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13263 /* Enlist this call site to the function. */
13264 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13265 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13268 complaint (_("Cannot find function owning DW_TAG_call_site "
13269 "DIE %s [in module %s]"),
13270 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13274 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13276 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13278 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13281 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13282 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13284 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13285 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13286 /* Keep NULL DWARF_BLOCK. */;
13287 else if (attr
->form_is_block ())
13289 struct dwarf2_locexpr_baton
*dlbaton
;
13291 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13292 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13293 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13294 dlbaton
->per_cu
= cu
->per_cu
;
13296 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13298 else if (attr
->form_is_ref ())
13300 struct dwarf2_cu
*target_cu
= cu
;
13301 struct die_info
*target_die
;
13303 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13304 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13305 if (die_is_declaration (target_die
, target_cu
))
13307 const char *target_physname
;
13309 /* Prefer the mangled name; otherwise compute the demangled one. */
13310 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13311 if (target_physname
== NULL
)
13312 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13313 if (target_physname
== NULL
)
13314 complaint (_("DW_AT_call_target target DIE has invalid "
13315 "physname, for referencing DIE %s [in module %s]"),
13316 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13318 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13324 /* DW_AT_entry_pc should be preferred. */
13325 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13326 <= PC_BOUNDS_INVALID
)
13327 complaint (_("DW_AT_call_target target DIE has invalid "
13328 "low pc, for referencing DIE %s [in module %s]"),
13329 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13332 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13333 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13338 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13339 "block nor reference, for DIE %s [in module %s]"),
13340 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13342 call_site
->per_cu
= cu
->per_cu
;
13344 for (child_die
= die
->child
;
13345 child_die
&& child_die
->tag
;
13346 child_die
= child_die
->sibling
)
13348 struct call_site_parameter
*parameter
;
13349 struct attribute
*loc
, *origin
;
13351 if (child_die
->tag
!= DW_TAG_call_site_parameter
13352 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13354 /* Already printed the complaint above. */
13358 gdb_assert (call_site
->parameter_count
< nparams
);
13359 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13361 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13362 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13363 register is contained in DW_AT_call_value. */
13365 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13366 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13367 if (origin
== NULL
)
13369 /* This was a pre-DWARF-5 GNU extension alias
13370 for DW_AT_call_parameter. */
13371 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13373 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13375 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13377 sect_offset sect_off
= origin
->get_ref_die_offset ();
13378 if (!cu
->header
.offset_in_cu_p (sect_off
))
13380 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13381 binding can be done only inside one CU. Such referenced DIE
13382 therefore cannot be even moved to DW_TAG_partial_unit. */
13383 complaint (_("DW_AT_call_parameter offset is not in CU for "
13384 "DW_TAG_call_site child DIE %s [in module %s]"),
13385 sect_offset_str (child_die
->sect_off
),
13386 objfile_name (objfile
));
13389 parameter
->u
.param_cu_off
13390 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13392 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13394 complaint (_("No DW_FORM_block* DW_AT_location for "
13395 "DW_TAG_call_site child DIE %s [in module %s]"),
13396 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13401 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13402 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13403 if (parameter
->u
.dwarf_reg
!= -1)
13404 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13405 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13406 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13407 ¶meter
->u
.fb_offset
))
13408 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13411 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13412 "for DW_FORM_block* DW_AT_location is supported for "
13413 "DW_TAG_call_site child DIE %s "
13415 sect_offset_str (child_die
->sect_off
),
13416 objfile_name (objfile
));
13421 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13423 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13424 if (attr
== NULL
|| !attr
->form_is_block ())
13426 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13427 "DW_TAG_call_site child DIE %s [in module %s]"),
13428 sect_offset_str (child_die
->sect_off
),
13429 objfile_name (objfile
));
13432 parameter
->value
= DW_BLOCK (attr
)->data
;
13433 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13435 /* Parameters are not pre-cleared by memset above. */
13436 parameter
->data_value
= NULL
;
13437 parameter
->data_value_size
= 0;
13438 call_site
->parameter_count
++;
13440 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13442 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13443 if (attr
!= nullptr)
13445 if (!attr
->form_is_block ())
13446 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13447 "DW_TAG_call_site child DIE %s [in module %s]"),
13448 sect_offset_str (child_die
->sect_off
),
13449 objfile_name (objfile
));
13452 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13453 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13459 /* Helper function for read_variable. If DIE represents a virtual
13460 table, then return the type of the concrete object that is
13461 associated with the virtual table. Otherwise, return NULL. */
13463 static struct type
*
13464 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13466 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13470 /* Find the type DIE. */
13471 struct die_info
*type_die
= NULL
;
13472 struct dwarf2_cu
*type_cu
= cu
;
13474 if (attr
->form_is_ref ())
13475 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13476 if (type_die
== NULL
)
13479 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13481 return die_containing_type (type_die
, type_cu
);
13484 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13487 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13489 struct rust_vtable_symbol
*storage
= NULL
;
13491 if (cu
->language
== language_rust
)
13493 struct type
*containing_type
= rust_containing_type (die
, cu
);
13495 if (containing_type
!= NULL
)
13497 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13499 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
13500 initialize_objfile_symbol (storage
);
13501 storage
->concrete_type
= containing_type
;
13502 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13506 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13507 struct attribute
*abstract_origin
13508 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13509 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13510 if (res
== NULL
&& loc
&& abstract_origin
)
13512 /* We have a variable without a name, but with a location and an abstract
13513 origin. This may be a concrete instance of an abstract variable
13514 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13516 struct dwarf2_cu
*origin_cu
= cu
;
13517 struct die_info
*origin_die
13518 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13519 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13520 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13524 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13525 reading .debug_rnglists.
13526 Callback's type should be:
13527 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13528 Return true if the attributes are present and valid, otherwise,
13531 template <typename Callback
>
13533 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13534 Callback
&&callback
)
13536 struct dwarf2_per_objfile
*dwarf2_per_objfile
13537 = cu
->per_cu
->dwarf2_per_objfile
;
13538 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13539 bfd
*obfd
= objfile
->obfd
;
13540 /* Base address selection entry. */
13541 gdb::optional
<CORE_ADDR
> base
;
13542 const gdb_byte
*buffer
;
13543 CORE_ADDR baseaddr
;
13544 bool overflow
= false;
13546 base
= cu
->base_address
;
13548 dwarf2_per_objfile
->rnglists
.read (objfile
);
13549 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13551 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13555 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13557 baseaddr
= objfile
->text_section_offset ();
13561 /* Initialize it due to a false compiler warning. */
13562 CORE_ADDR range_beginning
= 0, range_end
= 0;
13563 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13564 + dwarf2_per_objfile
->rnglists
.size
);
13565 unsigned int bytes_read
;
13567 if (buffer
== buf_end
)
13572 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13575 case DW_RLE_end_of_list
:
13577 case DW_RLE_base_address
:
13578 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13583 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13584 buffer
+= bytes_read
;
13586 case DW_RLE_start_length
:
13587 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13592 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13594 buffer
+= bytes_read
;
13595 range_end
= (range_beginning
13596 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13597 buffer
+= bytes_read
;
13598 if (buffer
> buf_end
)
13604 case DW_RLE_offset_pair
:
13605 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13606 buffer
+= bytes_read
;
13607 if (buffer
> buf_end
)
13612 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13613 buffer
+= bytes_read
;
13614 if (buffer
> buf_end
)
13620 case DW_RLE_start_end
:
13621 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13626 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13628 buffer
+= bytes_read
;
13629 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13630 buffer
+= bytes_read
;
13633 complaint (_("Invalid .debug_rnglists data (no base address)"));
13636 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13638 if (rlet
== DW_RLE_base_address
)
13641 if (!base
.has_value ())
13643 /* We have no valid base address for the ranges
13645 complaint (_("Invalid .debug_rnglists data (no base address)"));
13649 if (range_beginning
> range_end
)
13651 /* Inverted range entries are invalid. */
13652 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13656 /* Empty range entries have no effect. */
13657 if (range_beginning
== range_end
)
13660 range_beginning
+= *base
;
13661 range_end
+= *base
;
13663 /* A not-uncommon case of bad debug info.
13664 Don't pollute the addrmap with bad data. */
13665 if (range_beginning
+ baseaddr
== 0
13666 && !dwarf2_per_objfile
->has_section_at_zero
)
13668 complaint (_(".debug_rnglists entry has start address of zero"
13669 " [in module %s]"), objfile_name (objfile
));
13673 callback (range_beginning
, range_end
);
13678 complaint (_("Offset %d is not terminated "
13679 "for DW_AT_ranges attribute"),
13687 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13688 Callback's type should be:
13689 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13690 Return 1 if the attributes are present and valid, otherwise, return 0. */
13692 template <typename Callback
>
13694 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13695 Callback
&&callback
)
13697 struct dwarf2_per_objfile
*dwarf2_per_objfile
13698 = cu
->per_cu
->dwarf2_per_objfile
;
13699 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13700 struct comp_unit_head
*cu_header
= &cu
->header
;
13701 bfd
*obfd
= objfile
->obfd
;
13702 unsigned int addr_size
= cu_header
->addr_size
;
13703 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13704 /* Base address selection entry. */
13705 gdb::optional
<CORE_ADDR
> base
;
13706 unsigned int dummy
;
13707 const gdb_byte
*buffer
;
13708 CORE_ADDR baseaddr
;
13710 if (cu_header
->version
>= 5)
13711 return dwarf2_rnglists_process (offset
, cu
, callback
);
13713 base
= cu
->base_address
;
13715 dwarf2_per_objfile
->ranges
.read (objfile
);
13716 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13718 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13722 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13724 baseaddr
= objfile
->text_section_offset ();
13728 CORE_ADDR range_beginning
, range_end
;
13730 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13731 buffer
+= addr_size
;
13732 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13733 buffer
+= addr_size
;
13734 offset
+= 2 * addr_size
;
13736 /* An end of list marker is a pair of zero addresses. */
13737 if (range_beginning
== 0 && range_end
== 0)
13738 /* Found the end of list entry. */
13741 /* Each base address selection entry is a pair of 2 values.
13742 The first is the largest possible address, the second is
13743 the base address. Check for a base address here. */
13744 if ((range_beginning
& mask
) == mask
)
13746 /* If we found the largest possible address, then we already
13747 have the base address in range_end. */
13752 if (!base
.has_value ())
13754 /* We have no valid base address for the ranges
13756 complaint (_("Invalid .debug_ranges data (no base address)"));
13760 if (range_beginning
> range_end
)
13762 /* Inverted range entries are invalid. */
13763 complaint (_("Invalid .debug_ranges data (inverted range)"));
13767 /* Empty range entries have no effect. */
13768 if (range_beginning
== range_end
)
13771 range_beginning
+= *base
;
13772 range_end
+= *base
;
13774 /* A not-uncommon case of bad debug info.
13775 Don't pollute the addrmap with bad data. */
13776 if (range_beginning
+ baseaddr
== 0
13777 && !dwarf2_per_objfile
->has_section_at_zero
)
13779 complaint (_(".debug_ranges entry has start address of zero"
13780 " [in module %s]"), objfile_name (objfile
));
13784 callback (range_beginning
, range_end
);
13790 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13791 Return 1 if the attributes are present and valid, otherwise, return 0.
13792 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13795 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13796 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13797 dwarf2_psymtab
*ranges_pst
)
13799 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13800 struct gdbarch
*gdbarch
= objfile
->arch ();
13801 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13804 CORE_ADDR high
= 0;
13807 retval
= dwarf2_ranges_process (offset
, cu
,
13808 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13810 if (ranges_pst
!= NULL
)
13815 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13816 range_beginning
+ baseaddr
)
13818 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13819 range_end
+ baseaddr
)
13821 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13822 lowpc
, highpc
- 1, ranges_pst
);
13825 /* FIXME: This is recording everything as a low-high
13826 segment of consecutive addresses. We should have a
13827 data structure for discontiguous block ranges
13831 low
= range_beginning
;
13837 if (range_beginning
< low
)
13838 low
= range_beginning
;
13839 if (range_end
> high
)
13847 /* If the first entry is an end-of-list marker, the range
13848 describes an empty scope, i.e. no instructions. */
13854 *high_return
= high
;
13858 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13859 definition for the return value. *LOWPC and *HIGHPC are set iff
13860 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13862 static enum pc_bounds_kind
13863 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13864 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13865 dwarf2_psymtab
*pst
)
13867 struct dwarf2_per_objfile
*dwarf2_per_objfile
13868 = cu
->per_cu
->dwarf2_per_objfile
;
13869 struct attribute
*attr
;
13870 struct attribute
*attr_high
;
13872 CORE_ADDR high
= 0;
13873 enum pc_bounds_kind ret
;
13875 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13878 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13879 if (attr
!= nullptr)
13881 low
= attr
->value_as_address ();
13882 high
= attr_high
->value_as_address ();
13883 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13887 /* Found high w/o low attribute. */
13888 return PC_BOUNDS_INVALID
;
13890 /* Found consecutive range of addresses. */
13891 ret
= PC_BOUNDS_HIGH_LOW
;
13895 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13898 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13899 We take advantage of the fact that DW_AT_ranges does not appear
13900 in DW_TAG_compile_unit of DWO files. */
13901 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13902 unsigned int ranges_offset
= (DW_UNSND (attr
)
13903 + (need_ranges_base
13907 /* Value of the DW_AT_ranges attribute is the offset in the
13908 .debug_ranges section. */
13909 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13910 return PC_BOUNDS_INVALID
;
13911 /* Found discontinuous range of addresses. */
13912 ret
= PC_BOUNDS_RANGES
;
13915 return PC_BOUNDS_NOT_PRESENT
;
13918 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
13920 return PC_BOUNDS_INVALID
;
13922 /* When using the GNU linker, .gnu.linkonce. sections are used to
13923 eliminate duplicate copies of functions and vtables and such.
13924 The linker will arbitrarily choose one and discard the others.
13925 The AT_*_pc values for such functions refer to local labels in
13926 these sections. If the section from that file was discarded, the
13927 labels are not in the output, so the relocs get a value of 0.
13928 If this is a discarded function, mark the pc bounds as invalid,
13929 so that GDB will ignore it. */
13930 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13931 return PC_BOUNDS_INVALID
;
13939 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13940 its low and high PC addresses. Do nothing if these addresses could not
13941 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13942 and HIGHPC to the high address if greater than HIGHPC. */
13945 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13946 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13947 struct dwarf2_cu
*cu
)
13949 CORE_ADDR low
, high
;
13950 struct die_info
*child
= die
->child
;
13952 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
13954 *lowpc
= std::min (*lowpc
, low
);
13955 *highpc
= std::max (*highpc
, high
);
13958 /* If the language does not allow nested subprograms (either inside
13959 subprograms or lexical blocks), we're done. */
13960 if (cu
->language
!= language_ada
)
13963 /* Check all the children of the given DIE. If it contains nested
13964 subprograms, then check their pc bounds. Likewise, we need to
13965 check lexical blocks as well, as they may also contain subprogram
13967 while (child
&& child
->tag
)
13969 if (child
->tag
== DW_TAG_subprogram
13970 || child
->tag
== DW_TAG_lexical_block
)
13971 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
13972 child
= child
->sibling
;
13976 /* Get the low and high pc's represented by the scope DIE, and store
13977 them in *LOWPC and *HIGHPC. If the correct values can't be
13978 determined, set *LOWPC to -1 and *HIGHPC to 0. */
13981 get_scope_pc_bounds (struct die_info
*die
,
13982 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13983 struct dwarf2_cu
*cu
)
13985 CORE_ADDR best_low
= (CORE_ADDR
) -1;
13986 CORE_ADDR best_high
= (CORE_ADDR
) 0;
13987 CORE_ADDR current_low
, current_high
;
13989 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
13990 >= PC_BOUNDS_RANGES
)
13992 best_low
= current_low
;
13993 best_high
= current_high
;
13997 struct die_info
*child
= die
->child
;
13999 while (child
&& child
->tag
)
14001 switch (child
->tag
) {
14002 case DW_TAG_subprogram
:
14003 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14005 case DW_TAG_namespace
:
14006 case DW_TAG_module
:
14007 /* FIXME: carlton/2004-01-16: Should we do this for
14008 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14009 that current GCC's always emit the DIEs corresponding
14010 to definitions of methods of classes as children of a
14011 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14012 the DIEs giving the declarations, which could be
14013 anywhere). But I don't see any reason why the
14014 standards says that they have to be there. */
14015 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14017 if (current_low
!= ((CORE_ADDR
) -1))
14019 best_low
= std::min (best_low
, current_low
);
14020 best_high
= std::max (best_high
, current_high
);
14028 child
= child
->sibling
;
14033 *highpc
= best_high
;
14036 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14040 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14041 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14043 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14044 struct gdbarch
*gdbarch
= objfile
->arch ();
14045 struct attribute
*attr
;
14046 struct attribute
*attr_high
;
14048 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14051 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14052 if (attr
!= nullptr)
14054 CORE_ADDR low
= attr
->value_as_address ();
14055 CORE_ADDR high
= attr_high
->value_as_address ();
14057 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14060 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14061 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14062 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14066 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14067 if (attr
!= nullptr)
14069 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14070 We take advantage of the fact that DW_AT_ranges does not appear
14071 in DW_TAG_compile_unit of DWO files. */
14072 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14074 /* The value of the DW_AT_ranges attribute is the offset of the
14075 address range list in the .debug_ranges section. */
14076 unsigned long offset
= (DW_UNSND (attr
)
14077 + (need_ranges_base
? cu
->ranges_base
: 0));
14079 std::vector
<blockrange
> blockvec
;
14080 dwarf2_ranges_process (offset
, cu
,
14081 [&] (CORE_ADDR start
, CORE_ADDR end
)
14085 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14086 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14087 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14088 blockvec
.emplace_back (start
, end
);
14091 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14095 /* Check whether the producer field indicates either of GCC < 4.6, or the
14096 Intel C/C++ compiler, and cache the result in CU. */
14099 check_producer (struct dwarf2_cu
*cu
)
14103 if (cu
->producer
== NULL
)
14105 /* For unknown compilers expect their behavior is DWARF version
14108 GCC started to support .debug_types sections by -gdwarf-4 since
14109 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14110 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14111 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14112 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14114 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14116 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14117 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14119 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14121 cu
->producer_is_icc
= true;
14122 cu
->producer_is_icc_lt_14
= major
< 14;
14124 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14125 cu
->producer_is_codewarrior
= true;
14128 /* For other non-GCC compilers, expect their behavior is DWARF version
14132 cu
->checked_producer
= true;
14135 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14136 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14137 during 4.6.0 experimental. */
14140 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14142 if (!cu
->checked_producer
)
14143 check_producer (cu
);
14145 return cu
->producer_is_gxx_lt_4_6
;
14149 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14150 with incorrect is_stmt attributes. */
14153 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14155 if (!cu
->checked_producer
)
14156 check_producer (cu
);
14158 return cu
->producer_is_codewarrior
;
14161 /* Return the default accessibility type if it is not overridden by
14162 DW_AT_accessibility. */
14164 static enum dwarf_access_attribute
14165 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14167 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14169 /* The default DWARF 2 accessibility for members is public, the default
14170 accessibility for inheritance is private. */
14172 if (die
->tag
!= DW_TAG_inheritance
)
14173 return DW_ACCESS_public
;
14175 return DW_ACCESS_private
;
14179 /* DWARF 3+ defines the default accessibility a different way. The same
14180 rules apply now for DW_TAG_inheritance as for the members and it only
14181 depends on the container kind. */
14183 if (die
->parent
->tag
== DW_TAG_class_type
)
14184 return DW_ACCESS_private
;
14186 return DW_ACCESS_public
;
14190 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14191 offset. If the attribute was not found return 0, otherwise return
14192 1. If it was found but could not properly be handled, set *OFFSET
14196 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14199 struct attribute
*attr
;
14201 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14206 /* Note that we do not check for a section offset first here.
14207 This is because DW_AT_data_member_location is new in DWARF 4,
14208 so if we see it, we can assume that a constant form is really
14209 a constant and not a section offset. */
14210 if (attr
->form_is_constant ())
14211 *offset
= attr
->constant_value (0);
14212 else if (attr
->form_is_section_offset ())
14213 dwarf2_complex_location_expr_complaint ();
14214 else if (attr
->form_is_block ())
14215 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14217 dwarf2_complex_location_expr_complaint ();
14225 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14228 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14229 struct field
*field
)
14231 struct attribute
*attr
;
14233 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14236 if (attr
->form_is_constant ())
14238 LONGEST offset
= attr
->constant_value (0);
14239 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14241 else if (attr
->form_is_section_offset ())
14242 dwarf2_complex_location_expr_complaint ();
14243 else if (attr
->form_is_block ())
14246 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14248 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14251 struct objfile
*objfile
14252 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14253 struct dwarf2_locexpr_baton
*dlbaton
14254 = XOBNEW (&objfile
->objfile_obstack
,
14255 struct dwarf2_locexpr_baton
);
14256 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14257 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14258 /* When using this baton, we want to compute the address
14259 of the field, not the value. This is why
14260 is_reference is set to false here. */
14261 dlbaton
->is_reference
= false;
14262 dlbaton
->per_cu
= cu
->per_cu
;
14264 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14268 dwarf2_complex_location_expr_complaint ();
14272 /* Add an aggregate field to the field list. */
14275 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14276 struct dwarf2_cu
*cu
)
14278 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14279 struct gdbarch
*gdbarch
= objfile
->arch ();
14280 struct nextfield
*new_field
;
14281 struct attribute
*attr
;
14283 const char *fieldname
= "";
14285 if (die
->tag
== DW_TAG_inheritance
)
14287 fip
->baseclasses
.emplace_back ();
14288 new_field
= &fip
->baseclasses
.back ();
14292 fip
->fields
.emplace_back ();
14293 new_field
= &fip
->fields
.back ();
14296 new_field
->offset
= die
->sect_off
;
14298 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14299 if (attr
!= nullptr)
14300 new_field
->accessibility
= DW_UNSND (attr
);
14302 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14303 if (new_field
->accessibility
!= DW_ACCESS_public
)
14304 fip
->non_public_fields
= 1;
14306 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14307 if (attr
!= nullptr)
14308 new_field
->virtuality
= DW_UNSND (attr
);
14310 new_field
->virtuality
= DW_VIRTUALITY_none
;
14312 fp
= &new_field
->field
;
14314 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14316 /* Data member other than a C++ static data member. */
14318 /* Get type of field. */
14319 fp
->type
= die_type (die
, cu
);
14321 SET_FIELD_BITPOS (*fp
, 0);
14323 /* Get bit size of field (zero if none). */
14324 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14325 if (attr
!= nullptr)
14327 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14331 FIELD_BITSIZE (*fp
) = 0;
14334 /* Get bit offset of field. */
14335 handle_data_member_location (die
, cu
, fp
);
14336 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14337 if (attr
!= nullptr)
14339 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14341 /* For big endian bits, the DW_AT_bit_offset gives the
14342 additional bit offset from the MSB of the containing
14343 anonymous object to the MSB of the field. We don't
14344 have to do anything special since we don't need to
14345 know the size of the anonymous object. */
14346 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14350 /* For little endian bits, compute the bit offset to the
14351 MSB of the anonymous object, subtract off the number of
14352 bits from the MSB of the field to the MSB of the
14353 object, and then subtract off the number of bits of
14354 the field itself. The result is the bit offset of
14355 the LSB of the field. */
14356 int anonymous_size
;
14357 int bit_offset
= DW_UNSND (attr
);
14359 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14360 if (attr
!= nullptr)
14362 /* The size of the anonymous object containing
14363 the bit field is explicit, so use the
14364 indicated size (in bytes). */
14365 anonymous_size
= DW_UNSND (attr
);
14369 /* The size of the anonymous object containing
14370 the bit field must be inferred from the type
14371 attribute of the data member containing the
14373 anonymous_size
= TYPE_LENGTH (fp
->type
);
14375 SET_FIELD_BITPOS (*fp
,
14376 (FIELD_BITPOS (*fp
)
14377 + anonymous_size
* bits_per_byte
14378 - bit_offset
- FIELD_BITSIZE (*fp
)));
14381 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14383 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14384 + attr
->constant_value (0)));
14386 /* Get name of field. */
14387 fieldname
= dwarf2_name (die
, cu
);
14388 if (fieldname
== NULL
)
14391 /* The name is already allocated along with this objfile, so we don't
14392 need to duplicate it for the type. */
14393 fp
->name
= fieldname
;
14395 /* Change accessibility for artificial fields (e.g. virtual table
14396 pointer or virtual base class pointer) to private. */
14397 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14399 FIELD_ARTIFICIAL (*fp
) = 1;
14400 new_field
->accessibility
= DW_ACCESS_private
;
14401 fip
->non_public_fields
= 1;
14404 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14406 /* C++ static member. */
14408 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14409 is a declaration, but all versions of G++ as of this writing
14410 (so through at least 3.2.1) incorrectly generate
14411 DW_TAG_variable tags. */
14413 const char *physname
;
14415 /* Get name of field. */
14416 fieldname
= dwarf2_name (die
, cu
);
14417 if (fieldname
== NULL
)
14420 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14422 /* Only create a symbol if this is an external value.
14423 new_symbol checks this and puts the value in the global symbol
14424 table, which we want. If it is not external, new_symbol
14425 will try to put the value in cu->list_in_scope which is wrong. */
14426 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14428 /* A static const member, not much different than an enum as far as
14429 we're concerned, except that we can support more types. */
14430 new_symbol (die
, NULL
, cu
);
14433 /* Get physical name. */
14434 physname
= dwarf2_physname (fieldname
, die
, cu
);
14436 /* The name is already allocated along with this objfile, so we don't
14437 need to duplicate it for the type. */
14438 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14439 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14440 FIELD_NAME (*fp
) = fieldname
;
14442 else if (die
->tag
== DW_TAG_inheritance
)
14444 /* C++ base class field. */
14445 handle_data_member_location (die
, cu
, fp
);
14446 FIELD_BITSIZE (*fp
) = 0;
14447 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14448 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14451 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14454 /* Can the type given by DIE define another type? */
14457 type_can_define_types (const struct die_info
*die
)
14461 case DW_TAG_typedef
:
14462 case DW_TAG_class_type
:
14463 case DW_TAG_structure_type
:
14464 case DW_TAG_union_type
:
14465 case DW_TAG_enumeration_type
:
14473 /* Add a type definition defined in the scope of the FIP's class. */
14476 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14477 struct dwarf2_cu
*cu
)
14479 struct decl_field fp
;
14480 memset (&fp
, 0, sizeof (fp
));
14482 gdb_assert (type_can_define_types (die
));
14484 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14485 fp
.name
= dwarf2_name (die
, cu
);
14486 fp
.type
= read_type_die (die
, cu
);
14488 /* Save accessibility. */
14489 enum dwarf_access_attribute accessibility
;
14490 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14492 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14494 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14495 switch (accessibility
)
14497 case DW_ACCESS_public
:
14498 /* The assumed value if neither private nor protected. */
14500 case DW_ACCESS_private
:
14503 case DW_ACCESS_protected
:
14504 fp
.is_protected
= 1;
14507 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14510 if (die
->tag
== DW_TAG_typedef
)
14511 fip
->typedef_field_list
.push_back (fp
);
14513 fip
->nested_types_list
.push_back (fp
);
14516 /* A convenience typedef that's used when finding the discriminant
14517 field for a variant part. */
14518 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14521 /* Compute the discriminant range for a given variant. OBSTACK is
14522 where the results will be stored. VARIANT is the variant to
14523 process. IS_UNSIGNED indicates whether the discriminant is signed
14526 static const gdb::array_view
<discriminant_range
>
14527 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14530 std::vector
<discriminant_range
> ranges
;
14532 if (variant
.default_branch
)
14535 if (variant
.discr_list_data
== nullptr)
14537 discriminant_range r
14538 = {variant
.discriminant_value
, variant
.discriminant_value
};
14539 ranges
.push_back (r
);
14543 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14544 variant
.discr_list_data
->size
);
14545 while (!data
.empty ())
14547 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14549 complaint (_("invalid discriminant marker: %d"), data
[0]);
14552 bool is_range
= data
[0] == DW_DSC_range
;
14553 data
= data
.slice (1);
14555 ULONGEST low
, high
;
14556 unsigned int bytes_read
;
14560 complaint (_("DW_AT_discr_list missing low value"));
14564 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14566 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14568 data
= data
.slice (bytes_read
);
14574 complaint (_("DW_AT_discr_list missing high value"));
14578 high
= read_unsigned_leb128 (nullptr, data
.data (),
14581 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14583 data
= data
.slice (bytes_read
);
14588 ranges
.push_back ({ low
, high
});
14592 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14594 std::copy (ranges
.begin (), ranges
.end (), result
);
14595 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14598 static const gdb::array_view
<variant_part
> create_variant_parts
14599 (struct obstack
*obstack
,
14600 const offset_map_type
&offset_map
,
14601 struct field_info
*fi
,
14602 const std::vector
<variant_part_builder
> &variant_parts
);
14604 /* Fill in a "struct variant" for a given variant field. RESULT is
14605 the variant to fill in. OBSTACK is where any needed allocations
14606 will be done. OFFSET_MAP holds the mapping from section offsets to
14607 fields for the type. FI describes the fields of the type we're
14608 processing. FIELD is the variant field we're converting. */
14611 create_one_variant (variant
&result
, struct obstack
*obstack
,
14612 const offset_map_type
&offset_map
,
14613 struct field_info
*fi
, const variant_field
&field
)
14615 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14616 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14617 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14618 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14619 field
.variant_parts
);
14622 /* Fill in a "struct variant_part" for a given variant part. RESULT
14623 is the variant part to fill in. OBSTACK is where any needed
14624 allocations will be done. OFFSET_MAP holds the mapping from
14625 section offsets to fields for the type. FI describes the fields of
14626 the type we're processing. BUILDER is the variant part to be
14630 create_one_variant_part (variant_part
&result
,
14631 struct obstack
*obstack
,
14632 const offset_map_type
&offset_map
,
14633 struct field_info
*fi
,
14634 const variant_part_builder
&builder
)
14636 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14637 if (iter
== offset_map
.end ())
14639 result
.discriminant_index
= -1;
14640 /* Doesn't matter. */
14641 result
.is_unsigned
= false;
14645 result
.discriminant_index
= iter
->second
;
14647 = TYPE_UNSIGNED (FIELD_TYPE
14648 (fi
->fields
[result
.discriminant_index
].field
));
14651 size_t n
= builder
.variants
.size ();
14652 variant
*output
= new (obstack
) variant
[n
];
14653 for (size_t i
= 0; i
< n
; ++i
)
14654 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14655 builder
.variants
[i
]);
14657 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14660 /* Create a vector of variant parts that can be attached to a type.
14661 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14662 holds the mapping from section offsets to fields for the type. FI
14663 describes the fields of the type we're processing. VARIANT_PARTS
14664 is the vector to convert. */
14666 static const gdb::array_view
<variant_part
>
14667 create_variant_parts (struct obstack
*obstack
,
14668 const offset_map_type
&offset_map
,
14669 struct field_info
*fi
,
14670 const std::vector
<variant_part_builder
> &variant_parts
)
14672 if (variant_parts
.empty ())
14675 size_t n
= variant_parts
.size ();
14676 variant_part
*result
= new (obstack
) variant_part
[n
];
14677 for (size_t i
= 0; i
< n
; ++i
)
14678 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14681 return gdb::array_view
<variant_part
> (result
, n
);
14684 /* Compute the variant part vector for FIP, attaching it to TYPE when
14688 add_variant_property (struct field_info
*fip
, struct type
*type
,
14689 struct dwarf2_cu
*cu
)
14691 /* Map section offsets of fields to their field index. Note the
14692 field index here does not take the number of baseclasses into
14694 offset_map_type offset_map
;
14695 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14696 offset_map
[fip
->fields
[i
].offset
] = i
;
14698 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14699 gdb::array_view
<variant_part
> parts
14700 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14701 fip
->variant_parts
);
14703 struct dynamic_prop prop
;
14704 prop
.kind
= PROP_VARIANT_PARTS
;
14705 prop
.data
.variant_parts
14706 = ((gdb::array_view
<variant_part
> *)
14707 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14709 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14712 /* Create the vector of fields, and attach it to the type. */
14715 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14716 struct dwarf2_cu
*cu
)
14718 int nfields
= fip
->nfields ();
14720 /* Record the field count, allocate space for the array of fields,
14721 and create blank accessibility bitfields if necessary. */
14722 TYPE_NFIELDS (type
) = nfields
;
14723 TYPE_FIELDS (type
) = (struct field
*)
14724 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14726 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14728 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14730 TYPE_FIELD_PRIVATE_BITS (type
) =
14731 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14732 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14734 TYPE_FIELD_PROTECTED_BITS (type
) =
14735 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14736 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14738 TYPE_FIELD_IGNORE_BITS (type
) =
14739 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14740 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14743 /* If the type has baseclasses, allocate and clear a bit vector for
14744 TYPE_FIELD_VIRTUAL_BITS. */
14745 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14747 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14748 unsigned char *pointer
;
14750 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14751 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14752 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14753 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14754 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14757 if (!fip
->variant_parts
.empty ())
14758 add_variant_property (fip
, type
, cu
);
14760 /* Copy the saved-up fields into the field vector. */
14761 for (int i
= 0; i
< nfields
; ++i
)
14763 struct nextfield
&field
14764 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14765 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14767 TYPE_FIELD (type
, i
) = field
.field
;
14768 switch (field
.accessibility
)
14770 case DW_ACCESS_private
:
14771 if (cu
->language
!= language_ada
)
14772 SET_TYPE_FIELD_PRIVATE (type
, i
);
14775 case DW_ACCESS_protected
:
14776 if (cu
->language
!= language_ada
)
14777 SET_TYPE_FIELD_PROTECTED (type
, i
);
14780 case DW_ACCESS_public
:
14784 /* Unknown accessibility. Complain and treat it as public. */
14786 complaint (_("unsupported accessibility %d"),
14787 field
.accessibility
);
14791 if (i
< fip
->baseclasses
.size ())
14793 switch (field
.virtuality
)
14795 case DW_VIRTUALITY_virtual
:
14796 case DW_VIRTUALITY_pure_virtual
:
14797 if (cu
->language
== language_ada
)
14798 error (_("unexpected virtuality in component of Ada type"));
14799 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14806 /* Return true if this member function is a constructor, false
14810 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14812 const char *fieldname
;
14813 const char *type_name
;
14816 if (die
->parent
== NULL
)
14819 if (die
->parent
->tag
!= DW_TAG_structure_type
14820 && die
->parent
->tag
!= DW_TAG_union_type
14821 && die
->parent
->tag
!= DW_TAG_class_type
)
14824 fieldname
= dwarf2_name (die
, cu
);
14825 type_name
= dwarf2_name (die
->parent
, cu
);
14826 if (fieldname
== NULL
|| type_name
== NULL
)
14829 len
= strlen (fieldname
);
14830 return (strncmp (fieldname
, type_name
, len
) == 0
14831 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14834 /* Check if the given VALUE is a recognized enum
14835 dwarf_defaulted_attribute constant according to DWARF5 spec,
14839 is_valid_DW_AT_defaulted (ULONGEST value
)
14843 case DW_DEFAULTED_no
:
14844 case DW_DEFAULTED_in_class
:
14845 case DW_DEFAULTED_out_of_class
:
14849 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14853 /* Add a member function to the proper fieldlist. */
14856 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14857 struct type
*type
, struct dwarf2_cu
*cu
)
14859 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14860 struct attribute
*attr
;
14862 struct fnfieldlist
*flp
= nullptr;
14863 struct fn_field
*fnp
;
14864 const char *fieldname
;
14865 struct type
*this_type
;
14866 enum dwarf_access_attribute accessibility
;
14868 if (cu
->language
== language_ada
)
14869 error (_("unexpected member function in Ada type"));
14871 /* Get name of member function. */
14872 fieldname
= dwarf2_name (die
, cu
);
14873 if (fieldname
== NULL
)
14876 /* Look up member function name in fieldlist. */
14877 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14879 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14881 flp
= &fip
->fnfieldlists
[i
];
14886 /* Create a new fnfieldlist if necessary. */
14887 if (flp
== nullptr)
14889 fip
->fnfieldlists
.emplace_back ();
14890 flp
= &fip
->fnfieldlists
.back ();
14891 flp
->name
= fieldname
;
14892 i
= fip
->fnfieldlists
.size () - 1;
14895 /* Create a new member function field and add it to the vector of
14897 flp
->fnfields
.emplace_back ();
14898 fnp
= &flp
->fnfields
.back ();
14900 /* Delay processing of the physname until later. */
14901 if (cu
->language
== language_cplus
)
14902 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14906 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14907 fnp
->physname
= physname
? physname
: "";
14910 fnp
->type
= alloc_type (objfile
);
14911 this_type
= read_type_die (die
, cu
);
14912 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14914 int nparams
= TYPE_NFIELDS (this_type
);
14916 /* TYPE is the domain of this method, and THIS_TYPE is the type
14917 of the method itself (TYPE_CODE_METHOD). */
14918 smash_to_method_type (fnp
->type
, type
,
14919 TYPE_TARGET_TYPE (this_type
),
14920 TYPE_FIELDS (this_type
),
14921 TYPE_NFIELDS (this_type
),
14922 TYPE_VARARGS (this_type
));
14924 /* Handle static member functions.
14925 Dwarf2 has no clean way to discern C++ static and non-static
14926 member functions. G++ helps GDB by marking the first
14927 parameter for non-static member functions (which is the this
14928 pointer) as artificial. We obtain this information from
14929 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14930 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14931 fnp
->voffset
= VOFFSET_STATIC
;
14934 complaint (_("member function type missing for '%s'"),
14935 dwarf2_full_name (fieldname
, die
, cu
));
14937 /* Get fcontext from DW_AT_containing_type if present. */
14938 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14939 fnp
->fcontext
= die_containing_type (die
, cu
);
14941 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14942 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14944 /* Get accessibility. */
14945 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14946 if (attr
!= nullptr)
14947 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14949 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14950 switch (accessibility
)
14952 case DW_ACCESS_private
:
14953 fnp
->is_private
= 1;
14955 case DW_ACCESS_protected
:
14956 fnp
->is_protected
= 1;
14960 /* Check for artificial methods. */
14961 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
14962 if (attr
&& DW_UNSND (attr
) != 0)
14963 fnp
->is_artificial
= 1;
14965 /* Check for defaulted methods. */
14966 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
14967 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
14968 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
14970 /* Check for deleted methods. */
14971 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
14972 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
14973 fnp
->is_deleted
= 1;
14975 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
14977 /* Get index in virtual function table if it is a virtual member
14978 function. For older versions of GCC, this is an offset in the
14979 appropriate virtual table, as specified by DW_AT_containing_type.
14980 For everyone else, it is an expression to be evaluated relative
14981 to the object address. */
14983 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14984 if (attr
!= nullptr)
14986 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
14988 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14990 /* Old-style GCC. */
14991 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14993 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14994 || (DW_BLOCK (attr
)->size
> 1
14995 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14996 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14998 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14999 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15000 dwarf2_complex_location_expr_complaint ();
15002 fnp
->voffset
/= cu
->header
.addr_size
;
15006 dwarf2_complex_location_expr_complaint ();
15008 if (!fnp
->fcontext
)
15010 /* If there is no `this' field and no DW_AT_containing_type,
15011 we cannot actually find a base class context for the
15013 if (TYPE_NFIELDS (this_type
) == 0
15014 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15016 complaint (_("cannot determine context for virtual member "
15017 "function \"%s\" (offset %s)"),
15018 fieldname
, sect_offset_str (die
->sect_off
));
15023 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15027 else if (attr
->form_is_section_offset ())
15029 dwarf2_complex_location_expr_complaint ();
15033 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15039 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15040 if (attr
&& DW_UNSND (attr
))
15042 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15043 complaint (_("Member function \"%s\" (offset %s) is virtual "
15044 "but the vtable offset is not specified"),
15045 fieldname
, sect_offset_str (die
->sect_off
));
15046 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15047 TYPE_CPLUS_DYNAMIC (type
) = 1;
15052 /* Create the vector of member function fields, and attach it to the type. */
15055 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15056 struct dwarf2_cu
*cu
)
15058 if (cu
->language
== language_ada
)
15059 error (_("unexpected member functions in Ada type"));
15061 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15062 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15064 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15066 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15068 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15069 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15071 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15072 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15073 fn_flp
->fn_fields
= (struct fn_field
*)
15074 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15076 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15077 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15080 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15083 /* Returns non-zero if NAME is the name of a vtable member in CU's
15084 language, zero otherwise. */
15086 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15088 static const char vptr
[] = "_vptr";
15090 /* Look for the C++ form of the vtable. */
15091 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15097 /* GCC outputs unnamed structures that are really pointers to member
15098 functions, with the ABI-specified layout. If TYPE describes
15099 such a structure, smash it into a member function type.
15101 GCC shouldn't do this; it should just output pointer to member DIEs.
15102 This is GCC PR debug/28767. */
15105 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15107 struct type
*pfn_type
, *self_type
, *new_type
;
15109 /* Check for a structure with no name and two children. */
15110 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15113 /* Check for __pfn and __delta members. */
15114 if (TYPE_FIELD_NAME (type
, 0) == NULL
15115 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15116 || TYPE_FIELD_NAME (type
, 1) == NULL
15117 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15120 /* Find the type of the method. */
15121 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15122 if (pfn_type
== NULL
15123 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15124 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15127 /* Look for the "this" argument. */
15128 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15129 if (TYPE_NFIELDS (pfn_type
) == 0
15130 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15131 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15134 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15135 new_type
= alloc_type (objfile
);
15136 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15137 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15138 TYPE_VARARGS (pfn_type
));
15139 smash_to_methodptr_type (type
, new_type
);
15142 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15143 appropriate error checking and issuing complaints if there is a
15147 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15149 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15151 if (attr
== nullptr)
15154 if (!attr
->form_is_constant ())
15156 complaint (_("DW_AT_alignment must have constant form"
15157 " - DIE at %s [in module %s]"),
15158 sect_offset_str (die
->sect_off
),
15159 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15164 if (attr
->form
== DW_FORM_sdata
)
15166 LONGEST val
= DW_SND (attr
);
15169 complaint (_("DW_AT_alignment value must not be negative"
15170 " - DIE at %s [in module %s]"),
15171 sect_offset_str (die
->sect_off
),
15172 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15178 align
= DW_UNSND (attr
);
15182 complaint (_("DW_AT_alignment value must not be zero"
15183 " - DIE at %s [in module %s]"),
15184 sect_offset_str (die
->sect_off
),
15185 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15188 if ((align
& (align
- 1)) != 0)
15190 complaint (_("DW_AT_alignment value must be a power of 2"
15191 " - DIE at %s [in module %s]"),
15192 sect_offset_str (die
->sect_off
),
15193 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15200 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15201 the alignment for TYPE. */
15204 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15207 if (!set_type_align (type
, get_alignment (cu
, die
)))
15208 complaint (_("DW_AT_alignment value too large"
15209 " - DIE at %s [in module %s]"),
15210 sect_offset_str (die
->sect_off
),
15211 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15214 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15215 constant for a type, according to DWARF5 spec, Table 5.5. */
15218 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15223 case DW_CC_pass_by_reference
:
15224 case DW_CC_pass_by_value
:
15228 complaint (_("unrecognized DW_AT_calling_convention value "
15229 "(%s) for a type"), pulongest (value
));
15234 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15235 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15236 also according to GNU-specific values (see include/dwarf2.h). */
15239 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15244 case DW_CC_program
:
15248 case DW_CC_GNU_renesas_sh
:
15249 case DW_CC_GNU_borland_fastcall_i386
:
15250 case DW_CC_GDB_IBM_OpenCL
:
15254 complaint (_("unrecognized DW_AT_calling_convention value "
15255 "(%s) for a subroutine"), pulongest (value
));
15260 /* Called when we find the DIE that starts a structure or union scope
15261 (definition) to create a type for the structure or union. Fill in
15262 the type's name and general properties; the members will not be
15263 processed until process_structure_scope. A symbol table entry for
15264 the type will also not be done until process_structure_scope (assuming
15265 the type has a name).
15267 NOTE: we need to call these functions regardless of whether or not the
15268 DIE has a DW_AT_name attribute, since it might be an anonymous
15269 structure or union. This gets the type entered into our set of
15270 user defined types. */
15272 static struct type
*
15273 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15275 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15277 struct attribute
*attr
;
15280 /* If the definition of this type lives in .debug_types, read that type.
15281 Don't follow DW_AT_specification though, that will take us back up
15282 the chain and we want to go down. */
15283 attr
= die
->attr (DW_AT_signature
);
15284 if (attr
!= nullptr)
15286 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15288 /* The type's CU may not be the same as CU.
15289 Ensure TYPE is recorded with CU in die_type_hash. */
15290 return set_die_type (die
, type
, cu
);
15293 type
= alloc_type (objfile
);
15294 INIT_CPLUS_SPECIFIC (type
);
15296 name
= dwarf2_name (die
, cu
);
15299 if (cu
->language
== language_cplus
15300 || cu
->language
== language_d
15301 || cu
->language
== language_rust
)
15303 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15305 /* dwarf2_full_name might have already finished building the DIE's
15306 type. If so, there is no need to continue. */
15307 if (get_die_type (die
, cu
) != NULL
)
15308 return get_die_type (die
, cu
);
15310 TYPE_NAME (type
) = full_name
;
15314 /* The name is already allocated along with this objfile, so
15315 we don't need to duplicate it for the type. */
15316 TYPE_NAME (type
) = name
;
15320 if (die
->tag
== DW_TAG_structure_type
)
15322 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15324 else if (die
->tag
== DW_TAG_union_type
)
15326 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15330 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15333 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15334 TYPE_DECLARED_CLASS (type
) = 1;
15336 /* Store the calling convention in the type if it's available in
15337 the die. Otherwise the calling convention remains set to
15338 the default value DW_CC_normal. */
15339 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15340 if (attr
!= nullptr
15341 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15343 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15344 TYPE_CPLUS_CALLING_CONVENTION (type
)
15345 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15348 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15349 if (attr
!= nullptr)
15351 if (attr
->form_is_constant ())
15352 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15355 struct dynamic_prop prop
;
15356 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15357 cu
->per_cu
->addr_type ()))
15358 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15359 TYPE_LENGTH (type
) = 0;
15364 TYPE_LENGTH (type
) = 0;
15367 maybe_set_alignment (cu
, die
, type
);
15369 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15371 /* ICC<14 does not output the required DW_AT_declaration on
15372 incomplete types, but gives them a size of zero. */
15373 TYPE_STUB (type
) = 1;
15376 TYPE_STUB_SUPPORTED (type
) = 1;
15378 if (die_is_declaration (die
, cu
))
15379 TYPE_STUB (type
) = 1;
15380 else if (attr
== NULL
&& die
->child
== NULL
15381 && producer_is_realview (cu
->producer
))
15382 /* RealView does not output the required DW_AT_declaration
15383 on incomplete types. */
15384 TYPE_STUB (type
) = 1;
15386 /* We need to add the type field to the die immediately so we don't
15387 infinitely recurse when dealing with pointers to the structure
15388 type within the structure itself. */
15389 set_die_type (die
, type
, cu
);
15391 /* set_die_type should be already done. */
15392 set_descriptive_type (type
, die
, cu
);
15397 static void handle_struct_member_die
15398 (struct die_info
*child_die
,
15400 struct field_info
*fi
,
15401 std::vector
<struct symbol
*> *template_args
,
15402 struct dwarf2_cu
*cu
);
15404 /* A helper for handle_struct_member_die that handles
15405 DW_TAG_variant_part. */
15408 handle_variant_part (struct die_info
*die
, struct type
*type
,
15409 struct field_info
*fi
,
15410 std::vector
<struct symbol
*> *template_args
,
15411 struct dwarf2_cu
*cu
)
15413 variant_part_builder
*new_part
;
15414 if (fi
->current_variant_part
== nullptr)
15416 fi
->variant_parts
.emplace_back ();
15417 new_part
= &fi
->variant_parts
.back ();
15419 else if (!fi
->current_variant_part
->processing_variant
)
15421 complaint (_("nested DW_TAG_variant_part seen "
15422 "- DIE at %s [in module %s]"),
15423 sect_offset_str (die
->sect_off
),
15424 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15429 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15430 current
.variant_parts
.emplace_back ();
15431 new_part
= ¤t
.variant_parts
.back ();
15434 /* When we recurse, we want callees to add to this new variant
15436 scoped_restore save_current_variant_part
15437 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15439 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15442 /* It's a univariant form, an extension we support. */
15444 else if (discr
->form_is_ref ())
15446 struct dwarf2_cu
*target_cu
= cu
;
15447 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15449 new_part
->discriminant_offset
= target_die
->sect_off
;
15453 complaint (_("DW_AT_discr does not have DIE reference form"
15454 " - DIE at %s [in module %s]"),
15455 sect_offset_str (die
->sect_off
),
15456 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15459 for (die_info
*child_die
= die
->child
;
15461 child_die
= child_die
->sibling
)
15462 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15465 /* A helper for handle_struct_member_die that handles
15469 handle_variant (struct die_info
*die
, struct type
*type
,
15470 struct field_info
*fi
,
15471 std::vector
<struct symbol
*> *template_args
,
15472 struct dwarf2_cu
*cu
)
15474 if (fi
->current_variant_part
== nullptr)
15476 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15477 "- DIE at %s [in module %s]"),
15478 sect_offset_str (die
->sect_off
),
15479 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15482 if (fi
->current_variant_part
->processing_variant
)
15484 complaint (_("nested DW_TAG_variant seen "
15485 "- DIE at %s [in module %s]"),
15486 sect_offset_str (die
->sect_off
),
15487 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15491 scoped_restore save_processing_variant
15492 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15495 fi
->current_variant_part
->variants
.emplace_back ();
15496 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15497 variant
.first_field
= fi
->fields
.size ();
15499 /* In a variant we want to get the discriminant and also add a
15500 field for our sole member child. */
15501 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15502 if (discr
== nullptr)
15504 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15505 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15506 variant
.default_branch
= true;
15508 variant
.discr_list_data
= DW_BLOCK (discr
);
15511 variant
.discriminant_value
= DW_UNSND (discr
);
15513 for (die_info
*variant_child
= die
->child
;
15514 variant_child
!= NULL
;
15515 variant_child
= variant_child
->sibling
)
15516 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15518 variant
.last_field
= fi
->fields
.size ();
15521 /* A helper for process_structure_scope that handles a single member
15525 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15526 struct field_info
*fi
,
15527 std::vector
<struct symbol
*> *template_args
,
15528 struct dwarf2_cu
*cu
)
15530 if (child_die
->tag
== DW_TAG_member
15531 || child_die
->tag
== DW_TAG_variable
)
15533 /* NOTE: carlton/2002-11-05: A C++ static data member
15534 should be a DW_TAG_member that is a declaration, but
15535 all versions of G++ as of this writing (so through at
15536 least 3.2.1) incorrectly generate DW_TAG_variable
15537 tags for them instead. */
15538 dwarf2_add_field (fi
, child_die
, cu
);
15540 else if (child_die
->tag
== DW_TAG_subprogram
)
15542 /* Rust doesn't have member functions in the C++ sense.
15543 However, it does emit ordinary functions as children
15544 of a struct DIE. */
15545 if (cu
->language
== language_rust
)
15546 read_func_scope (child_die
, cu
);
15549 /* C++ member function. */
15550 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15553 else if (child_die
->tag
== DW_TAG_inheritance
)
15555 /* C++ base class field. */
15556 dwarf2_add_field (fi
, child_die
, cu
);
15558 else if (type_can_define_types (child_die
))
15559 dwarf2_add_type_defn (fi
, child_die
, cu
);
15560 else if (child_die
->tag
== DW_TAG_template_type_param
15561 || child_die
->tag
== DW_TAG_template_value_param
)
15563 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15566 template_args
->push_back (arg
);
15568 else if (child_die
->tag
== DW_TAG_variant_part
)
15569 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15570 else if (child_die
->tag
== DW_TAG_variant
)
15571 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15574 /* Finish creating a structure or union type, including filling in
15575 its members and creating a symbol for it. */
15578 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15580 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15581 struct die_info
*child_die
;
15584 type
= get_die_type (die
, cu
);
15586 type
= read_structure_type (die
, cu
);
15588 bool has_template_parameters
= false;
15589 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15591 struct field_info fi
;
15592 std::vector
<struct symbol
*> template_args
;
15594 child_die
= die
->child
;
15596 while (child_die
&& child_die
->tag
)
15598 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15599 child_die
= child_die
->sibling
;
15602 /* Attach template arguments to type. */
15603 if (!template_args
.empty ())
15605 has_template_parameters
= true;
15606 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15607 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15608 TYPE_TEMPLATE_ARGUMENTS (type
)
15609 = XOBNEWVEC (&objfile
->objfile_obstack
,
15611 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15612 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15613 template_args
.data (),
15614 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15615 * sizeof (struct symbol
*)));
15618 /* Attach fields and member functions to the type. */
15619 if (fi
.nfields () > 0)
15620 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15621 if (!fi
.fnfieldlists
.empty ())
15623 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15625 /* Get the type which refers to the base class (possibly this
15626 class itself) which contains the vtable pointer for the current
15627 class from the DW_AT_containing_type attribute. This use of
15628 DW_AT_containing_type is a GNU extension. */
15630 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15632 struct type
*t
= die_containing_type (die
, cu
);
15634 set_type_vptr_basetype (type
, t
);
15639 /* Our own class provides vtbl ptr. */
15640 for (i
= TYPE_NFIELDS (t
) - 1;
15641 i
>= TYPE_N_BASECLASSES (t
);
15644 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15646 if (is_vtable_name (fieldname
, cu
))
15648 set_type_vptr_fieldno (type
, i
);
15653 /* Complain if virtual function table field not found. */
15654 if (i
< TYPE_N_BASECLASSES (t
))
15655 complaint (_("virtual function table pointer "
15656 "not found when defining class '%s'"),
15657 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15661 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15664 else if (cu
->producer
15665 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15667 /* The IBM XLC compiler does not provide direct indication
15668 of the containing type, but the vtable pointer is
15669 always named __vfp. */
15673 for (i
= TYPE_NFIELDS (type
) - 1;
15674 i
>= TYPE_N_BASECLASSES (type
);
15677 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15679 set_type_vptr_fieldno (type
, i
);
15680 set_type_vptr_basetype (type
, type
);
15687 /* Copy fi.typedef_field_list linked list elements content into the
15688 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15689 if (!fi
.typedef_field_list
.empty ())
15691 int count
= fi
.typedef_field_list
.size ();
15693 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15694 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15695 = ((struct decl_field
*)
15697 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15698 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15700 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15701 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15704 /* Copy fi.nested_types_list linked list elements content into the
15705 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15706 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15708 int count
= fi
.nested_types_list
.size ();
15710 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15711 TYPE_NESTED_TYPES_ARRAY (type
)
15712 = ((struct decl_field
*)
15713 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15714 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15716 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15717 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15721 quirk_gcc_member_function_pointer (type
, objfile
);
15722 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15723 cu
->rust_unions
.push_back (type
);
15725 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15726 snapshots) has been known to create a die giving a declaration
15727 for a class that has, as a child, a die giving a definition for a
15728 nested class. So we have to process our children even if the
15729 current die is a declaration. Normally, of course, a declaration
15730 won't have any children at all. */
15732 child_die
= die
->child
;
15734 while (child_die
!= NULL
&& child_die
->tag
)
15736 if (child_die
->tag
== DW_TAG_member
15737 || child_die
->tag
== DW_TAG_variable
15738 || child_die
->tag
== DW_TAG_inheritance
15739 || child_die
->tag
== DW_TAG_template_value_param
15740 || child_die
->tag
== DW_TAG_template_type_param
)
15745 process_die (child_die
, cu
);
15747 child_die
= child_die
->sibling
;
15750 /* Do not consider external references. According to the DWARF standard,
15751 these DIEs are identified by the fact that they have no byte_size
15752 attribute, and a declaration attribute. */
15753 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15754 || !die_is_declaration (die
, cu
)
15755 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15757 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15759 if (has_template_parameters
)
15761 struct symtab
*symtab
;
15762 if (sym
!= nullptr)
15763 symtab
= symbol_symtab (sym
);
15764 else if (cu
->line_header
!= nullptr)
15766 /* Any related symtab will do. */
15768 = cu
->line_header
->file_names ()[0].symtab
;
15773 complaint (_("could not find suitable "
15774 "symtab for template parameter"
15775 " - DIE at %s [in module %s]"),
15776 sect_offset_str (die
->sect_off
),
15777 objfile_name (objfile
));
15780 if (symtab
!= nullptr)
15782 /* Make sure that the symtab is set on the new symbols.
15783 Even though they don't appear in this symtab directly,
15784 other parts of gdb assume that symbols do, and this is
15785 reasonably true. */
15786 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15787 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15793 /* Assuming DIE is an enumeration type, and TYPE is its associated
15794 type, update TYPE using some information only available in DIE's
15795 children. In particular, the fields are computed. */
15798 update_enumeration_type_from_children (struct die_info
*die
,
15800 struct dwarf2_cu
*cu
)
15802 struct die_info
*child_die
;
15803 int unsigned_enum
= 1;
15806 auto_obstack obstack
;
15807 std::vector
<struct field
> fields
;
15809 for (child_die
= die
->child
;
15810 child_die
!= NULL
&& child_die
->tag
;
15811 child_die
= child_die
->sibling
)
15813 struct attribute
*attr
;
15815 const gdb_byte
*bytes
;
15816 struct dwarf2_locexpr_baton
*baton
;
15819 if (child_die
->tag
!= DW_TAG_enumerator
)
15822 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15826 name
= dwarf2_name (child_die
, cu
);
15828 name
= "<anonymous enumerator>";
15830 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15831 &value
, &bytes
, &baton
);
15839 if (count_one_bits_ll (value
) >= 2)
15843 fields
.emplace_back ();
15844 struct field
&field
= fields
.back ();
15845 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
15846 SET_FIELD_ENUMVAL (field
, value
);
15849 if (!fields
.empty ())
15851 TYPE_NFIELDS (type
) = fields
.size ();
15852 TYPE_FIELDS (type
) = (struct field
*)
15853 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ());
15854 memcpy (TYPE_FIELDS (type
), fields
.data (),
15855 sizeof (struct field
) * fields
.size ());
15859 TYPE_UNSIGNED (type
) = 1;
15861 TYPE_FLAG_ENUM (type
) = 1;
15864 /* Given a DW_AT_enumeration_type die, set its type. We do not
15865 complete the type's fields yet, or create any symbols. */
15867 static struct type
*
15868 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15870 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15872 struct attribute
*attr
;
15875 /* If the definition of this type lives in .debug_types, read that type.
15876 Don't follow DW_AT_specification though, that will take us back up
15877 the chain and we want to go down. */
15878 attr
= die
->attr (DW_AT_signature
);
15879 if (attr
!= nullptr)
15881 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15883 /* The type's CU may not be the same as CU.
15884 Ensure TYPE is recorded with CU in die_type_hash. */
15885 return set_die_type (die
, type
, cu
);
15888 type
= alloc_type (objfile
);
15890 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
15891 name
= dwarf2_full_name (NULL
, die
, cu
);
15893 TYPE_NAME (type
) = name
;
15895 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15898 struct type
*underlying_type
= die_type (die
, cu
);
15900 TYPE_TARGET_TYPE (type
) = underlying_type
;
15903 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15904 if (attr
!= nullptr)
15906 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15910 TYPE_LENGTH (type
) = 0;
15913 maybe_set_alignment (cu
, die
, type
);
15915 /* The enumeration DIE can be incomplete. In Ada, any type can be
15916 declared as private in the package spec, and then defined only
15917 inside the package body. Such types are known as Taft Amendment
15918 Types. When another package uses such a type, an incomplete DIE
15919 may be generated by the compiler. */
15920 if (die_is_declaration (die
, cu
))
15921 TYPE_STUB (type
) = 1;
15923 /* If this type has an underlying type that is not a stub, then we
15924 may use its attributes. We always use the "unsigned" attribute
15925 in this situation, because ordinarily we guess whether the type
15926 is unsigned -- but the guess can be wrong and the underlying type
15927 can tell us the reality. However, we defer to a local size
15928 attribute if one exists, because this lets the compiler override
15929 the underlying type if needed. */
15930 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
15932 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
15933 underlying_type
= check_typedef (underlying_type
);
15934 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
15935 if (TYPE_LENGTH (type
) == 0)
15936 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
15937 if (TYPE_RAW_ALIGN (type
) == 0
15938 && TYPE_RAW_ALIGN (underlying_type
) != 0)
15939 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
15942 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
15944 set_die_type (die
, type
, cu
);
15946 /* Finish the creation of this type by using the enum's children.
15947 Note that, as usual, this must come after set_die_type to avoid
15948 infinite recursion when trying to compute the names of the
15950 update_enumeration_type_from_children (die
, type
, cu
);
15955 /* Given a pointer to a die which begins an enumeration, process all
15956 the dies that define the members of the enumeration, and create the
15957 symbol for the enumeration type.
15959 NOTE: We reverse the order of the element list. */
15962 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15964 struct type
*this_type
;
15966 this_type
= get_die_type (die
, cu
);
15967 if (this_type
== NULL
)
15968 this_type
= read_enumeration_type (die
, cu
);
15970 if (die
->child
!= NULL
)
15972 struct die_info
*child_die
;
15975 child_die
= die
->child
;
15976 while (child_die
&& child_die
->tag
)
15978 if (child_die
->tag
!= DW_TAG_enumerator
)
15980 process_die (child_die
, cu
);
15984 name
= dwarf2_name (child_die
, cu
);
15986 new_symbol (child_die
, this_type
, cu
);
15989 child_die
= child_die
->sibling
;
15993 /* If we are reading an enum from a .debug_types unit, and the enum
15994 is a declaration, and the enum is not the signatured type in the
15995 unit, then we do not want to add a symbol for it. Adding a
15996 symbol would in some cases obscure the true definition of the
15997 enum, giving users an incomplete type when the definition is
15998 actually available. Note that we do not want to do this for all
15999 enums which are just declarations, because C++0x allows forward
16000 enum declarations. */
16001 if (cu
->per_cu
->is_debug_types
16002 && die_is_declaration (die
, cu
))
16004 struct signatured_type
*sig_type
;
16006 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16007 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16008 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16012 new_symbol (die
, this_type
, cu
);
16015 /* Extract all information from a DW_TAG_array_type DIE and put it in
16016 the DIE's type field. For now, this only handles one dimensional
16019 static struct type
*
16020 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16022 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16023 struct die_info
*child_die
;
16025 struct type
*element_type
, *range_type
, *index_type
;
16026 struct attribute
*attr
;
16028 struct dynamic_prop
*byte_stride_prop
= NULL
;
16029 unsigned int bit_stride
= 0;
16031 element_type
= die_type (die
, cu
);
16033 /* The die_type call above may have already set the type for this DIE. */
16034 type
= get_die_type (die
, cu
);
16038 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16042 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16045 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16046 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16050 complaint (_("unable to read array DW_AT_byte_stride "
16051 " - DIE at %s [in module %s]"),
16052 sect_offset_str (die
->sect_off
),
16053 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16054 /* Ignore this attribute. We will likely not be able to print
16055 arrays of this type correctly, but there is little we can do
16056 to help if we cannot read the attribute's value. */
16057 byte_stride_prop
= NULL
;
16061 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16063 bit_stride
= DW_UNSND (attr
);
16065 /* Irix 6.2 native cc creates array types without children for
16066 arrays with unspecified length. */
16067 if (die
->child
== NULL
)
16069 index_type
= objfile_type (objfile
)->builtin_int
;
16070 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16071 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16072 byte_stride_prop
, bit_stride
);
16073 return set_die_type (die
, type
, cu
);
16076 std::vector
<struct type
*> range_types
;
16077 child_die
= die
->child
;
16078 while (child_die
&& child_die
->tag
)
16080 if (child_die
->tag
== DW_TAG_subrange_type
)
16082 struct type
*child_type
= read_type_die (child_die
, cu
);
16084 if (child_type
!= NULL
)
16086 /* The range type was succesfully read. Save it for the
16087 array type creation. */
16088 range_types
.push_back (child_type
);
16091 child_die
= child_die
->sibling
;
16094 /* Dwarf2 dimensions are output from left to right, create the
16095 necessary array types in backwards order. */
16097 type
= element_type
;
16099 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16103 while (i
< range_types
.size ())
16104 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16105 byte_stride_prop
, bit_stride
);
16109 size_t ndim
= range_types
.size ();
16111 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16112 byte_stride_prop
, bit_stride
);
16115 /* Understand Dwarf2 support for vector types (like they occur on
16116 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16117 array type. This is not part of the Dwarf2/3 standard yet, but a
16118 custom vendor extension. The main difference between a regular
16119 array and the vector variant is that vectors are passed by value
16121 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16122 if (attr
!= nullptr)
16123 make_vector_type (type
);
16125 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16126 implementation may choose to implement triple vectors using this
16128 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16129 if (attr
!= nullptr)
16131 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16132 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16134 complaint (_("DW_AT_byte_size for array type smaller "
16135 "than the total size of elements"));
16138 name
= dwarf2_name (die
, cu
);
16140 TYPE_NAME (type
) = name
;
16142 maybe_set_alignment (cu
, die
, type
);
16144 /* Install the type in the die. */
16145 set_die_type (die
, type
, cu
);
16147 /* set_die_type should be already done. */
16148 set_descriptive_type (type
, die
, cu
);
16153 static enum dwarf_array_dim_ordering
16154 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16156 struct attribute
*attr
;
16158 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16160 if (attr
!= nullptr)
16161 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16163 /* GNU F77 is a special case, as at 08/2004 array type info is the
16164 opposite order to the dwarf2 specification, but data is still
16165 laid out as per normal fortran.
16167 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16168 version checking. */
16170 if (cu
->language
== language_fortran
16171 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16173 return DW_ORD_row_major
;
16176 switch (cu
->language_defn
->la_array_ordering
)
16178 case array_column_major
:
16179 return DW_ORD_col_major
;
16180 case array_row_major
:
16182 return DW_ORD_row_major
;
16186 /* Extract all information from a DW_TAG_set_type DIE and put it in
16187 the DIE's type field. */
16189 static struct type
*
16190 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16192 struct type
*domain_type
, *set_type
;
16193 struct attribute
*attr
;
16195 domain_type
= die_type (die
, cu
);
16197 /* The die_type call above may have already set the type for this DIE. */
16198 set_type
= get_die_type (die
, cu
);
16202 set_type
= create_set_type (NULL
, domain_type
);
16204 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16205 if (attr
!= nullptr)
16206 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16208 maybe_set_alignment (cu
, die
, set_type
);
16210 return set_die_type (die
, set_type
, cu
);
16213 /* A helper for read_common_block that creates a locexpr baton.
16214 SYM is the symbol which we are marking as computed.
16215 COMMON_DIE is the DIE for the common block.
16216 COMMON_LOC is the location expression attribute for the common
16218 MEMBER_LOC is the location expression attribute for the particular
16219 member of the common block that we are processing.
16220 CU is the CU from which the above come. */
16223 mark_common_block_symbol_computed (struct symbol
*sym
,
16224 struct die_info
*common_die
,
16225 struct attribute
*common_loc
,
16226 struct attribute
*member_loc
,
16227 struct dwarf2_cu
*cu
)
16229 struct dwarf2_per_objfile
*dwarf2_per_objfile
16230 = cu
->per_cu
->dwarf2_per_objfile
;
16231 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16232 struct dwarf2_locexpr_baton
*baton
;
16234 unsigned int cu_off
;
16235 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16236 LONGEST offset
= 0;
16238 gdb_assert (common_loc
&& member_loc
);
16239 gdb_assert (common_loc
->form_is_block ());
16240 gdb_assert (member_loc
->form_is_block ()
16241 || member_loc
->form_is_constant ());
16243 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16244 baton
->per_cu
= cu
->per_cu
;
16245 gdb_assert (baton
->per_cu
);
16247 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16249 if (member_loc
->form_is_constant ())
16251 offset
= member_loc
->constant_value (0);
16252 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16255 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16257 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16260 *ptr
++ = DW_OP_call4
;
16261 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16262 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16265 if (member_loc
->form_is_constant ())
16267 *ptr
++ = DW_OP_addr
;
16268 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16269 ptr
+= cu
->header
.addr_size
;
16273 /* We have to copy the data here, because DW_OP_call4 will only
16274 use a DW_AT_location attribute. */
16275 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16276 ptr
+= DW_BLOCK (member_loc
)->size
;
16279 *ptr
++ = DW_OP_plus
;
16280 gdb_assert (ptr
- baton
->data
== baton
->size
);
16282 SYMBOL_LOCATION_BATON (sym
) = baton
;
16283 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16286 /* Create appropriate locally-scoped variables for all the
16287 DW_TAG_common_block entries. Also create a struct common_block
16288 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16289 is used to separate the common blocks name namespace from regular
16293 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16295 struct attribute
*attr
;
16297 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16298 if (attr
!= nullptr)
16300 /* Support the .debug_loc offsets. */
16301 if (attr
->form_is_block ())
16305 else if (attr
->form_is_section_offset ())
16307 dwarf2_complex_location_expr_complaint ();
16312 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16313 "common block member");
16318 if (die
->child
!= NULL
)
16320 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16321 struct die_info
*child_die
;
16322 size_t n_entries
= 0, size
;
16323 struct common_block
*common_block
;
16324 struct symbol
*sym
;
16326 for (child_die
= die
->child
;
16327 child_die
&& child_die
->tag
;
16328 child_die
= child_die
->sibling
)
16331 size
= (sizeof (struct common_block
)
16332 + (n_entries
- 1) * sizeof (struct symbol
*));
16334 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16336 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16337 common_block
->n_entries
= 0;
16339 for (child_die
= die
->child
;
16340 child_die
&& child_die
->tag
;
16341 child_die
= child_die
->sibling
)
16343 /* Create the symbol in the DW_TAG_common_block block in the current
16345 sym
= new_symbol (child_die
, NULL
, cu
);
16348 struct attribute
*member_loc
;
16350 common_block
->contents
[common_block
->n_entries
++] = sym
;
16352 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16356 /* GDB has handled this for a long time, but it is
16357 not specified by DWARF. It seems to have been
16358 emitted by gfortran at least as recently as:
16359 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16360 complaint (_("Variable in common block has "
16361 "DW_AT_data_member_location "
16362 "- DIE at %s [in module %s]"),
16363 sect_offset_str (child_die
->sect_off
),
16364 objfile_name (objfile
));
16366 if (member_loc
->form_is_section_offset ())
16367 dwarf2_complex_location_expr_complaint ();
16368 else if (member_loc
->form_is_constant ()
16369 || member_loc
->form_is_block ())
16371 if (attr
!= nullptr)
16372 mark_common_block_symbol_computed (sym
, die
, attr
,
16376 dwarf2_complex_location_expr_complaint ();
16381 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16382 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16386 /* Create a type for a C++ namespace. */
16388 static struct type
*
16389 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16391 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16392 const char *previous_prefix
, *name
;
16396 /* For extensions, reuse the type of the original namespace. */
16397 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16399 struct die_info
*ext_die
;
16400 struct dwarf2_cu
*ext_cu
= cu
;
16402 ext_die
= dwarf2_extension (die
, &ext_cu
);
16403 type
= read_type_die (ext_die
, ext_cu
);
16405 /* EXT_CU may not be the same as CU.
16406 Ensure TYPE is recorded with CU in die_type_hash. */
16407 return set_die_type (die
, type
, cu
);
16410 name
= namespace_name (die
, &is_anonymous
, cu
);
16412 /* Now build the name of the current namespace. */
16414 previous_prefix
= determine_prefix (die
, cu
);
16415 if (previous_prefix
[0] != '\0')
16416 name
= typename_concat (&objfile
->objfile_obstack
,
16417 previous_prefix
, name
, 0, cu
);
16419 /* Create the type. */
16420 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16422 return set_die_type (die
, type
, cu
);
16425 /* Read a namespace scope. */
16428 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16430 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16433 /* Add a symbol associated to this if we haven't seen the namespace
16434 before. Also, add a using directive if it's an anonymous
16437 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16441 type
= read_type_die (die
, cu
);
16442 new_symbol (die
, type
, cu
);
16444 namespace_name (die
, &is_anonymous
, cu
);
16447 const char *previous_prefix
= determine_prefix (die
, cu
);
16449 std::vector
<const char *> excludes
;
16450 add_using_directive (using_directives (cu
),
16451 previous_prefix
, TYPE_NAME (type
), NULL
,
16452 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16456 if (die
->child
!= NULL
)
16458 struct die_info
*child_die
= die
->child
;
16460 while (child_die
&& child_die
->tag
)
16462 process_die (child_die
, cu
);
16463 child_die
= child_die
->sibling
;
16468 /* Read a Fortran module as type. This DIE can be only a declaration used for
16469 imported module. Still we need that type as local Fortran "use ... only"
16470 declaration imports depend on the created type in determine_prefix. */
16472 static struct type
*
16473 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16475 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16476 const char *module_name
;
16479 module_name
= dwarf2_name (die
, cu
);
16480 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16482 return set_die_type (die
, type
, cu
);
16485 /* Read a Fortran module. */
16488 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16490 struct die_info
*child_die
= die
->child
;
16493 type
= read_type_die (die
, cu
);
16494 new_symbol (die
, type
, cu
);
16496 while (child_die
&& child_die
->tag
)
16498 process_die (child_die
, cu
);
16499 child_die
= child_die
->sibling
;
16503 /* Return the name of the namespace represented by DIE. Set
16504 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16507 static const char *
16508 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16510 struct die_info
*current_die
;
16511 const char *name
= NULL
;
16513 /* Loop through the extensions until we find a name. */
16515 for (current_die
= die
;
16516 current_die
!= NULL
;
16517 current_die
= dwarf2_extension (die
, &cu
))
16519 /* We don't use dwarf2_name here so that we can detect the absence
16520 of a name -> anonymous namespace. */
16521 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16527 /* Is it an anonymous namespace? */
16529 *is_anonymous
= (name
== NULL
);
16531 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16536 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16537 the user defined type vector. */
16539 static struct type
*
16540 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16542 struct gdbarch
*gdbarch
16543 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16544 struct comp_unit_head
*cu_header
= &cu
->header
;
16546 struct attribute
*attr_byte_size
;
16547 struct attribute
*attr_address_class
;
16548 int byte_size
, addr_class
;
16549 struct type
*target_type
;
16551 target_type
= die_type (die
, cu
);
16553 /* The die_type call above may have already set the type for this DIE. */
16554 type
= get_die_type (die
, cu
);
16558 type
= lookup_pointer_type (target_type
);
16560 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16561 if (attr_byte_size
)
16562 byte_size
= DW_UNSND (attr_byte_size
);
16564 byte_size
= cu_header
->addr_size
;
16566 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16567 if (attr_address_class
)
16568 addr_class
= DW_UNSND (attr_address_class
);
16570 addr_class
= DW_ADDR_none
;
16572 ULONGEST alignment
= get_alignment (cu
, die
);
16574 /* If the pointer size, alignment, or address class is different
16575 than the default, create a type variant marked as such and set
16576 the length accordingly. */
16577 if (TYPE_LENGTH (type
) != byte_size
16578 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16579 && alignment
!= TYPE_RAW_ALIGN (type
))
16580 || addr_class
!= DW_ADDR_none
)
16582 if (gdbarch_address_class_type_flags_p (gdbarch
))
16586 type_flags
= gdbarch_address_class_type_flags
16587 (gdbarch
, byte_size
, addr_class
);
16588 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16590 type
= make_type_with_address_space (type
, type_flags
);
16592 else if (TYPE_LENGTH (type
) != byte_size
)
16594 complaint (_("invalid pointer size %d"), byte_size
);
16596 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16598 complaint (_("Invalid DW_AT_alignment"
16599 " - DIE at %s [in module %s]"),
16600 sect_offset_str (die
->sect_off
),
16601 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16605 /* Should we also complain about unhandled address classes? */
16609 TYPE_LENGTH (type
) = byte_size
;
16610 set_type_align (type
, alignment
);
16611 return set_die_type (die
, type
, cu
);
16614 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16615 the user defined type vector. */
16617 static struct type
*
16618 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16621 struct type
*to_type
;
16622 struct type
*domain
;
16624 to_type
= die_type (die
, cu
);
16625 domain
= die_containing_type (die
, cu
);
16627 /* The calls above may have already set the type for this DIE. */
16628 type
= get_die_type (die
, cu
);
16632 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16633 type
= lookup_methodptr_type (to_type
);
16634 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16636 struct type
*new_type
16637 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16639 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16640 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16641 TYPE_VARARGS (to_type
));
16642 type
= lookup_methodptr_type (new_type
);
16645 type
= lookup_memberptr_type (to_type
, domain
);
16647 return set_die_type (die
, type
, cu
);
16650 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16651 the user defined type vector. */
16653 static struct type
*
16654 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16655 enum type_code refcode
)
16657 struct comp_unit_head
*cu_header
= &cu
->header
;
16658 struct type
*type
, *target_type
;
16659 struct attribute
*attr
;
16661 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16663 target_type
= die_type (die
, cu
);
16665 /* The die_type call above may have already set the type for this DIE. */
16666 type
= get_die_type (die
, cu
);
16670 type
= lookup_reference_type (target_type
, refcode
);
16671 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16672 if (attr
!= nullptr)
16674 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16678 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16680 maybe_set_alignment (cu
, die
, type
);
16681 return set_die_type (die
, type
, cu
);
16684 /* Add the given cv-qualifiers to the element type of the array. GCC
16685 outputs DWARF type qualifiers that apply to an array, not the
16686 element type. But GDB relies on the array element type to carry
16687 the cv-qualifiers. This mimics section 6.7.3 of the C99
16690 static struct type
*
16691 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16692 struct type
*base_type
, int cnst
, int voltl
)
16694 struct type
*el_type
, *inner_array
;
16696 base_type
= copy_type (base_type
);
16697 inner_array
= base_type
;
16699 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16701 TYPE_TARGET_TYPE (inner_array
) =
16702 copy_type (TYPE_TARGET_TYPE (inner_array
));
16703 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16706 el_type
= TYPE_TARGET_TYPE (inner_array
);
16707 cnst
|= TYPE_CONST (el_type
);
16708 voltl
|= TYPE_VOLATILE (el_type
);
16709 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16711 return set_die_type (die
, base_type
, cu
);
16714 static struct type
*
16715 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16717 struct type
*base_type
, *cv_type
;
16719 base_type
= die_type (die
, cu
);
16721 /* The die_type call above may have already set the type for this DIE. */
16722 cv_type
= get_die_type (die
, cu
);
16726 /* In case the const qualifier is applied to an array type, the element type
16727 is so qualified, not the array type (section 6.7.3 of C99). */
16728 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16729 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16731 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16732 return set_die_type (die
, cv_type
, cu
);
16735 static struct type
*
16736 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16738 struct type
*base_type
, *cv_type
;
16740 base_type
= die_type (die
, cu
);
16742 /* The die_type call above may have already set the type for this DIE. */
16743 cv_type
= get_die_type (die
, cu
);
16747 /* In case the volatile qualifier is applied to an array type, the
16748 element type is so qualified, not the array type (section 6.7.3
16750 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16751 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16753 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16754 return set_die_type (die
, cv_type
, cu
);
16757 /* Handle DW_TAG_restrict_type. */
16759 static struct type
*
16760 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16762 struct type
*base_type
, *cv_type
;
16764 base_type
= die_type (die
, cu
);
16766 /* The die_type call above may have already set the type for this DIE. */
16767 cv_type
= get_die_type (die
, cu
);
16771 cv_type
= make_restrict_type (base_type
);
16772 return set_die_type (die
, cv_type
, cu
);
16775 /* Handle DW_TAG_atomic_type. */
16777 static struct type
*
16778 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16780 struct type
*base_type
, *cv_type
;
16782 base_type
= die_type (die
, cu
);
16784 /* The die_type call above may have already set the type for this DIE. */
16785 cv_type
= get_die_type (die
, cu
);
16789 cv_type
= make_atomic_type (base_type
);
16790 return set_die_type (die
, cv_type
, cu
);
16793 /* Extract all information from a DW_TAG_string_type DIE and add to
16794 the user defined type vector. It isn't really a user defined type,
16795 but it behaves like one, with other DIE's using an AT_user_def_type
16796 attribute to reference it. */
16798 static struct type
*
16799 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16801 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16802 struct gdbarch
*gdbarch
= objfile
->arch ();
16803 struct type
*type
, *range_type
, *index_type
, *char_type
;
16804 struct attribute
*attr
;
16805 struct dynamic_prop prop
;
16806 bool length_is_constant
= true;
16809 /* There are a couple of places where bit sizes might be made use of
16810 when parsing a DW_TAG_string_type, however, no producer that we know
16811 of make use of these. Handling bit sizes that are a multiple of the
16812 byte size is easy enough, but what about other bit sizes? Lets deal
16813 with that problem when we have to. Warn about these attributes being
16814 unsupported, then parse the type and ignore them like we always
16816 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16817 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16819 static bool warning_printed
= false;
16820 if (!warning_printed
)
16822 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16823 "currently supported on DW_TAG_string_type."));
16824 warning_printed
= true;
16828 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16829 if (attr
!= nullptr && !attr
->form_is_constant ())
16831 /* The string length describes the location at which the length of
16832 the string can be found. The size of the length field can be
16833 specified with one of the attributes below. */
16834 struct type
*prop_type
;
16835 struct attribute
*len
16836 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16837 if (len
== nullptr)
16838 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16839 if (len
!= nullptr && len
->form_is_constant ())
16841 /* Pass 0 as the default as we know this attribute is constant
16842 and the default value will not be returned. */
16843 LONGEST sz
= len
->constant_value (0);
16844 prop_type
= cu
->per_cu
->int_type (sz
, true);
16848 /* If the size is not specified then we assume it is the size of
16849 an address on this target. */
16850 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16853 /* Convert the attribute into a dynamic property. */
16854 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16857 length_is_constant
= false;
16859 else if (attr
!= nullptr)
16861 /* This DW_AT_string_length just contains the length with no
16862 indirection. There's no need to create a dynamic property in this
16863 case. Pass 0 for the default value as we know it will not be
16864 returned in this case. */
16865 length
= attr
->constant_value (0);
16867 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16869 /* We don't currently support non-constant byte sizes for strings. */
16870 length
= attr
->constant_value (1);
16874 /* Use 1 as a fallback length if we have nothing else. */
16878 index_type
= objfile_type (objfile
)->builtin_int
;
16879 if (length_is_constant
)
16880 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16883 struct dynamic_prop low_bound
;
16885 low_bound
.kind
= PROP_CONST
;
16886 low_bound
.data
.const_val
= 1;
16887 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16889 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16890 type
= create_string_type (NULL
, char_type
, range_type
);
16892 return set_die_type (die
, type
, cu
);
16895 /* Assuming that DIE corresponds to a function, returns nonzero
16896 if the function is prototyped. */
16899 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16901 struct attribute
*attr
;
16903 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16904 if (attr
&& (DW_UNSND (attr
) != 0))
16907 /* The DWARF standard implies that the DW_AT_prototyped attribute
16908 is only meaningful for C, but the concept also extends to other
16909 languages that allow unprototyped functions (Eg: Objective C).
16910 For all other languages, assume that functions are always
16912 if (cu
->language
!= language_c
16913 && cu
->language
!= language_objc
16914 && cu
->language
!= language_opencl
)
16917 /* RealView does not emit DW_AT_prototyped. We can not distinguish
16918 prototyped and unprototyped functions; default to prototyped,
16919 since that is more common in modern code (and RealView warns
16920 about unprototyped functions). */
16921 if (producer_is_realview (cu
->producer
))
16927 /* Handle DIES due to C code like:
16931 int (*funcp)(int a, long l);
16935 ('funcp' generates a DW_TAG_subroutine_type DIE). */
16937 static struct type
*
16938 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16940 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16941 struct type
*type
; /* Type that this function returns. */
16942 struct type
*ftype
; /* Function that returns above type. */
16943 struct attribute
*attr
;
16945 type
= die_type (die
, cu
);
16947 /* The die_type call above may have already set the type for this DIE. */
16948 ftype
= get_die_type (die
, cu
);
16952 ftype
= lookup_function_type (type
);
16954 if (prototyped_function_p (die
, cu
))
16955 TYPE_PROTOTYPED (ftype
) = 1;
16957 /* Store the calling convention in the type if it's available in
16958 the subroutine die. Otherwise set the calling convention to
16959 the default value DW_CC_normal. */
16960 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16961 if (attr
!= nullptr
16962 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
16963 TYPE_CALLING_CONVENTION (ftype
)
16964 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
16965 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
16966 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
16968 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
16970 /* Record whether the function returns normally to its caller or not
16971 if the DWARF producer set that information. */
16972 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
16973 if (attr
&& (DW_UNSND (attr
) != 0))
16974 TYPE_NO_RETURN (ftype
) = 1;
16976 /* We need to add the subroutine type to the die immediately so
16977 we don't infinitely recurse when dealing with parameters
16978 declared as the same subroutine type. */
16979 set_die_type (die
, ftype
, cu
);
16981 if (die
->child
!= NULL
)
16983 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
16984 struct die_info
*child_die
;
16985 int nparams
, iparams
;
16987 /* Count the number of parameters.
16988 FIXME: GDB currently ignores vararg functions, but knows about
16989 vararg member functions. */
16991 child_die
= die
->child
;
16992 while (child_die
&& child_die
->tag
)
16994 if (child_die
->tag
== DW_TAG_formal_parameter
)
16996 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
16997 TYPE_VARARGS (ftype
) = 1;
16998 child_die
= child_die
->sibling
;
17001 /* Allocate storage for parameters and fill them in. */
17002 TYPE_NFIELDS (ftype
) = nparams
;
17003 TYPE_FIELDS (ftype
) = (struct field
*)
17004 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17006 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17007 even if we error out during the parameters reading below. */
17008 for (iparams
= 0; iparams
< nparams
; iparams
++)
17009 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17012 child_die
= die
->child
;
17013 while (child_die
&& child_die
->tag
)
17015 if (child_die
->tag
== DW_TAG_formal_parameter
)
17017 struct type
*arg_type
;
17019 /* DWARF version 2 has no clean way to discern C++
17020 static and non-static member functions. G++ helps
17021 GDB by marking the first parameter for non-static
17022 member functions (which is the this pointer) as
17023 artificial. We pass this information to
17024 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17026 DWARF version 3 added DW_AT_object_pointer, which GCC
17027 4.5 does not yet generate. */
17028 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17029 if (attr
!= nullptr)
17030 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17032 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17033 arg_type
= die_type (child_die
, cu
);
17035 /* RealView does not mark THIS as const, which the testsuite
17036 expects. GCC marks THIS as const in method definitions,
17037 but not in the class specifications (GCC PR 43053). */
17038 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17039 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17042 struct dwarf2_cu
*arg_cu
= cu
;
17043 const char *name
= dwarf2_name (child_die
, cu
);
17045 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17046 if (attr
!= nullptr)
17048 /* If the compiler emits this, use it. */
17049 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17052 else if (name
&& strcmp (name
, "this") == 0)
17053 /* Function definitions will have the argument names. */
17055 else if (name
== NULL
&& iparams
== 0)
17056 /* Declarations may not have the names, so like
17057 elsewhere in GDB, assume an artificial first
17058 argument is "this". */
17062 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17066 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17069 child_die
= child_die
->sibling
;
17076 static struct type
*
17077 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17079 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17080 const char *name
= NULL
;
17081 struct type
*this_type
, *target_type
;
17083 name
= dwarf2_full_name (NULL
, die
, cu
);
17084 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17085 TYPE_TARGET_STUB (this_type
) = 1;
17086 set_die_type (die
, this_type
, cu
);
17087 target_type
= die_type (die
, cu
);
17088 if (target_type
!= this_type
)
17089 TYPE_TARGET_TYPE (this_type
) = target_type
;
17092 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17093 spec and cause infinite loops in GDB. */
17094 complaint (_("Self-referential DW_TAG_typedef "
17095 "- DIE at %s [in module %s]"),
17096 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17097 TYPE_TARGET_TYPE (this_type
) = NULL
;
17101 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17102 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17103 Handle these by just returning the target type, rather than
17104 constructing an anonymous typedef type and trying to handle this
17106 set_die_type (die
, target_type
, cu
);
17107 return target_type
;
17112 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17113 (which may be different from NAME) to the architecture back-end to allow
17114 it to guess the correct format if necessary. */
17116 static struct type
*
17117 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17118 const char *name_hint
, enum bfd_endian byte_order
)
17120 struct gdbarch
*gdbarch
= objfile
->arch ();
17121 const struct floatformat
**format
;
17124 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17126 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17128 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17133 /* Allocate an integer type of size BITS and name NAME. */
17135 static struct type
*
17136 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17137 int bits
, int unsigned_p
, const char *name
)
17141 /* Versions of Intel's C Compiler generate an integer type called "void"
17142 instead of using DW_TAG_unspecified_type. This has been seen on
17143 at least versions 14, 17, and 18. */
17144 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17145 && strcmp (name
, "void") == 0)
17146 type
= objfile_type (objfile
)->builtin_void
;
17148 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17153 /* Initialise and return a floating point type of size BITS suitable for
17154 use as a component of a complex number. The NAME_HINT is passed through
17155 when initialising the floating point type and is the name of the complex
17158 As DWARF doesn't currently provide an explicit name for the components
17159 of a complex number, but it can be helpful to have these components
17160 named, we try to select a suitable name based on the size of the
17162 static struct type
*
17163 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17164 struct objfile
*objfile
,
17165 int bits
, const char *name_hint
,
17166 enum bfd_endian byte_order
)
17168 gdbarch
*gdbarch
= objfile
->arch ();
17169 struct type
*tt
= nullptr;
17171 /* Try to find a suitable floating point builtin type of size BITS.
17172 We're going to use the name of this type as the name for the complex
17173 target type that we are about to create. */
17174 switch (cu
->language
)
17176 case language_fortran
:
17180 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17183 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17185 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17187 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17195 tt
= builtin_type (gdbarch
)->builtin_float
;
17198 tt
= builtin_type (gdbarch
)->builtin_double
;
17200 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17202 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17208 /* If the type we found doesn't match the size we were looking for, then
17209 pretend we didn't find a type at all, the complex target type we
17210 create will then be nameless. */
17211 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17214 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17215 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17218 /* Find a representation of a given base type and install
17219 it in the TYPE field of the die. */
17221 static struct type
*
17222 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17224 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17226 struct attribute
*attr
;
17227 int encoding
= 0, bits
= 0;
17231 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17232 if (attr
!= nullptr)
17233 encoding
= DW_UNSND (attr
);
17234 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17235 if (attr
!= nullptr)
17236 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17237 name
= dwarf2_name (die
, cu
);
17239 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17241 arch
= objfile
->arch ();
17242 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17244 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17247 int endianity
= DW_UNSND (attr
);
17252 byte_order
= BFD_ENDIAN_BIG
;
17254 case DW_END_little
:
17255 byte_order
= BFD_ENDIAN_LITTLE
;
17258 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17265 case DW_ATE_address
:
17266 /* Turn DW_ATE_address into a void * pointer. */
17267 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17268 type
= init_pointer_type (objfile
, bits
, name
, type
);
17270 case DW_ATE_boolean
:
17271 type
= init_boolean_type (objfile
, bits
, 1, name
);
17273 case DW_ATE_complex_float
:
17274 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17276 if (TYPE_CODE (type
) == TYPE_CODE_ERROR
)
17278 if (name
== nullptr)
17280 struct obstack
*obstack
17281 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17282 name
= obconcat (obstack
, "_Complex ", TYPE_NAME (type
),
17285 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17288 type
= init_complex_type (name
, type
);
17290 case DW_ATE_decimal_float
:
17291 type
= init_decfloat_type (objfile
, bits
, name
);
17294 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17296 case DW_ATE_signed
:
17297 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17299 case DW_ATE_unsigned
:
17300 if (cu
->language
== language_fortran
17302 && startswith (name
, "character("))
17303 type
= init_character_type (objfile
, bits
, 1, name
);
17305 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17307 case DW_ATE_signed_char
:
17308 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17309 || cu
->language
== language_pascal
17310 || cu
->language
== language_fortran
)
17311 type
= init_character_type (objfile
, bits
, 0, name
);
17313 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17315 case DW_ATE_unsigned_char
:
17316 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17317 || cu
->language
== language_pascal
17318 || cu
->language
== language_fortran
17319 || cu
->language
== language_rust
)
17320 type
= init_character_type (objfile
, bits
, 1, name
);
17322 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17327 type
= builtin_type (arch
)->builtin_char16
;
17328 else if (bits
== 32)
17329 type
= builtin_type (arch
)->builtin_char32
;
17332 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17334 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17336 return set_die_type (die
, type
, cu
);
17341 complaint (_("unsupported DW_AT_encoding: '%s'"),
17342 dwarf_type_encoding_name (encoding
));
17343 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17347 if (name
&& strcmp (name
, "char") == 0)
17348 TYPE_NOSIGN (type
) = 1;
17350 maybe_set_alignment (cu
, die
, type
);
17352 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17354 return set_die_type (die
, type
, cu
);
17357 /* Parse dwarf attribute if it's a block, reference or constant and put the
17358 resulting value of the attribute into struct bound_prop.
17359 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17362 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17363 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17364 struct type
*default_type
)
17366 struct dwarf2_property_baton
*baton
;
17367 struct obstack
*obstack
17368 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17370 gdb_assert (default_type
!= NULL
);
17372 if (attr
== NULL
|| prop
== NULL
)
17375 if (attr
->form_is_block ())
17377 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17378 baton
->property_type
= default_type
;
17379 baton
->locexpr
.per_cu
= cu
->per_cu
;
17380 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17381 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17382 switch (attr
->name
)
17384 case DW_AT_string_length
:
17385 baton
->locexpr
.is_reference
= true;
17388 baton
->locexpr
.is_reference
= false;
17391 prop
->data
.baton
= baton
;
17392 prop
->kind
= PROP_LOCEXPR
;
17393 gdb_assert (prop
->data
.baton
!= NULL
);
17395 else if (attr
->form_is_ref ())
17397 struct dwarf2_cu
*target_cu
= cu
;
17398 struct die_info
*target_die
;
17399 struct attribute
*target_attr
;
17401 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17402 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17403 if (target_attr
== NULL
)
17404 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17406 if (target_attr
== NULL
)
17409 switch (target_attr
->name
)
17411 case DW_AT_location
:
17412 if (target_attr
->form_is_section_offset ())
17414 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17415 baton
->property_type
= die_type (target_die
, target_cu
);
17416 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17417 prop
->data
.baton
= baton
;
17418 prop
->kind
= PROP_LOCLIST
;
17419 gdb_assert (prop
->data
.baton
!= NULL
);
17421 else if (target_attr
->form_is_block ())
17423 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17424 baton
->property_type
= die_type (target_die
, target_cu
);
17425 baton
->locexpr
.per_cu
= cu
->per_cu
;
17426 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17427 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17428 baton
->locexpr
.is_reference
= true;
17429 prop
->data
.baton
= baton
;
17430 prop
->kind
= PROP_LOCEXPR
;
17431 gdb_assert (prop
->data
.baton
!= NULL
);
17435 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17436 "dynamic property");
17440 case DW_AT_data_member_location
:
17444 if (!handle_data_member_location (target_die
, target_cu
,
17448 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17449 baton
->property_type
= read_type_die (target_die
->parent
,
17451 baton
->offset_info
.offset
= offset
;
17452 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17453 prop
->data
.baton
= baton
;
17454 prop
->kind
= PROP_ADDR_OFFSET
;
17459 else if (attr
->form_is_constant ())
17461 prop
->data
.const_val
= attr
->constant_value (0);
17462 prop
->kind
= PROP_CONST
;
17466 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17467 dwarf2_name (die
, cu
));
17477 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17479 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17480 struct type
*int_type
;
17482 /* Helper macro to examine the various builtin types. */
17483 #define TRY_TYPE(F) \
17484 int_type = (unsigned_p \
17485 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17486 : objfile_type (objfile)->builtin_ ## F); \
17487 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17494 TRY_TYPE (long_long
);
17498 gdb_assert_not_reached ("unable to find suitable integer type");
17504 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17506 int addr_size
= this->addr_size ();
17507 return int_type (addr_size
, unsigned_p
);
17510 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17511 present (which is valid) then compute the default type based on the
17512 compilation units address size. */
17514 static struct type
*
17515 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17517 struct type
*index_type
= die_type (die
, cu
);
17519 /* Dwarf-2 specifications explicitly allows to create subrange types
17520 without specifying a base type.
17521 In that case, the base type must be set to the type of
17522 the lower bound, upper bound or count, in that order, if any of these
17523 three attributes references an object that has a type.
17524 If no base type is found, the Dwarf-2 specifications say that
17525 a signed integer type of size equal to the size of an address should
17527 For the following C code: `extern char gdb_int [];'
17528 GCC produces an empty range DIE.
17529 FIXME: muller/2010-05-28: Possible references to object for low bound,
17530 high bound or count are not yet handled by this code. */
17531 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17532 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17537 /* Read the given DW_AT_subrange DIE. */
17539 static struct type
*
17540 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17542 struct type
*base_type
, *orig_base_type
;
17543 struct type
*range_type
;
17544 struct attribute
*attr
;
17545 struct dynamic_prop low
, high
;
17546 int low_default_is_valid
;
17547 int high_bound_is_count
= 0;
17549 ULONGEST negative_mask
;
17551 orig_base_type
= read_subrange_index_type (die
, cu
);
17553 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17554 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17555 creating the range type, but we use the result of check_typedef
17556 when examining properties of the type. */
17557 base_type
= check_typedef (orig_base_type
);
17559 /* The die_type call above may have already set the type for this DIE. */
17560 range_type
= get_die_type (die
, cu
);
17564 low
.kind
= PROP_CONST
;
17565 high
.kind
= PROP_CONST
;
17566 high
.data
.const_val
= 0;
17568 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17569 omitting DW_AT_lower_bound. */
17570 switch (cu
->language
)
17573 case language_cplus
:
17574 low
.data
.const_val
= 0;
17575 low_default_is_valid
= 1;
17577 case language_fortran
:
17578 low
.data
.const_val
= 1;
17579 low_default_is_valid
= 1;
17582 case language_objc
:
17583 case language_rust
:
17584 low
.data
.const_val
= 0;
17585 low_default_is_valid
= (cu
->header
.version
>= 4);
17589 case language_pascal
:
17590 low
.data
.const_val
= 1;
17591 low_default_is_valid
= (cu
->header
.version
>= 4);
17594 low
.data
.const_val
= 0;
17595 low_default_is_valid
= 0;
17599 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17600 if (attr
!= nullptr)
17601 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17602 else if (!low_default_is_valid
)
17603 complaint (_("Missing DW_AT_lower_bound "
17604 "- DIE at %s [in module %s]"),
17605 sect_offset_str (die
->sect_off
),
17606 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17608 struct attribute
*attr_ub
, *attr_count
;
17609 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17610 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17612 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17613 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17615 /* If bounds are constant do the final calculation here. */
17616 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17617 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17619 high_bound_is_count
= 1;
17623 if (attr_ub
!= NULL
)
17624 complaint (_("Unresolved DW_AT_upper_bound "
17625 "- DIE at %s [in module %s]"),
17626 sect_offset_str (die
->sect_off
),
17627 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17628 if (attr_count
!= NULL
)
17629 complaint (_("Unresolved DW_AT_count "
17630 "- DIE at %s [in module %s]"),
17631 sect_offset_str (die
->sect_off
),
17632 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17637 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17638 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17639 bias
= bias_attr
->constant_value (0);
17641 /* Normally, the DWARF producers are expected to use a signed
17642 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17643 But this is unfortunately not always the case, as witnessed
17644 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17645 is used instead. To work around that ambiguity, we treat
17646 the bounds as signed, and thus sign-extend their values, when
17647 the base type is signed. */
17649 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17650 if (low
.kind
== PROP_CONST
17651 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17652 low
.data
.const_val
|= negative_mask
;
17653 if (high
.kind
== PROP_CONST
17654 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17655 high
.data
.const_val
|= negative_mask
;
17657 /* Check for bit and byte strides. */
17658 struct dynamic_prop byte_stride_prop
;
17659 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17660 if (attr_byte_stride
!= nullptr)
17662 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17663 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17667 struct dynamic_prop bit_stride_prop
;
17668 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17669 if (attr_bit_stride
!= nullptr)
17671 /* It only makes sense to have either a bit or byte stride. */
17672 if (attr_byte_stride
!= nullptr)
17674 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17675 "- DIE at %s [in module %s]"),
17676 sect_offset_str (die
->sect_off
),
17677 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17678 attr_bit_stride
= nullptr;
17682 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17683 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17688 if (attr_byte_stride
!= nullptr
17689 || attr_bit_stride
!= nullptr)
17691 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17692 struct dynamic_prop
*stride
17693 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17696 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17697 &high
, bias
, stride
, byte_stride_p
);
17700 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17702 if (high_bound_is_count
)
17703 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17705 /* Ada expects an empty array on no boundary attributes. */
17706 if (attr
== NULL
&& cu
->language
!= language_ada
)
17707 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17709 name
= dwarf2_name (die
, cu
);
17711 TYPE_NAME (range_type
) = name
;
17713 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17714 if (attr
!= nullptr)
17715 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17717 maybe_set_alignment (cu
, die
, range_type
);
17719 set_die_type (die
, range_type
, cu
);
17721 /* set_die_type should be already done. */
17722 set_descriptive_type (range_type
, die
, cu
);
17727 static struct type
*
17728 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17732 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17734 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17736 /* In Ada, an unspecified type is typically used when the description
17737 of the type is deferred to a different unit. When encountering
17738 such a type, we treat it as a stub, and try to resolve it later on,
17740 if (cu
->language
== language_ada
)
17741 TYPE_STUB (type
) = 1;
17743 return set_die_type (die
, type
, cu
);
17746 /* Read a single die and all its descendents. Set the die's sibling
17747 field to NULL; set other fields in the die correctly, and set all
17748 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17749 location of the info_ptr after reading all of those dies. PARENT
17750 is the parent of the die in question. */
17752 static struct die_info
*
17753 read_die_and_children (const struct die_reader_specs
*reader
,
17754 const gdb_byte
*info_ptr
,
17755 const gdb_byte
**new_info_ptr
,
17756 struct die_info
*parent
)
17758 struct die_info
*die
;
17759 const gdb_byte
*cur_ptr
;
17761 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17764 *new_info_ptr
= cur_ptr
;
17767 store_in_ref_table (die
, reader
->cu
);
17769 if (die
->has_children
)
17770 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17774 *new_info_ptr
= cur_ptr
;
17777 die
->sibling
= NULL
;
17778 die
->parent
= parent
;
17782 /* Read a die, all of its descendents, and all of its siblings; set
17783 all of the fields of all of the dies correctly. Arguments are as
17784 in read_die_and_children. */
17786 static struct die_info
*
17787 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17788 const gdb_byte
*info_ptr
,
17789 const gdb_byte
**new_info_ptr
,
17790 struct die_info
*parent
)
17792 struct die_info
*first_die
, *last_sibling
;
17793 const gdb_byte
*cur_ptr
;
17795 cur_ptr
= info_ptr
;
17796 first_die
= last_sibling
= NULL
;
17800 struct die_info
*die
17801 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17805 *new_info_ptr
= cur_ptr
;
17812 last_sibling
->sibling
= die
;
17814 last_sibling
= die
;
17818 /* Read a die, all of its descendents, and all of its siblings; set
17819 all of the fields of all of the dies correctly. Arguments are as
17820 in read_die_and_children.
17821 This the main entry point for reading a DIE and all its children. */
17823 static struct die_info
*
17824 read_die_and_siblings (const struct die_reader_specs
*reader
,
17825 const gdb_byte
*info_ptr
,
17826 const gdb_byte
**new_info_ptr
,
17827 struct die_info
*parent
)
17829 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17830 new_info_ptr
, parent
);
17832 if (dwarf_die_debug
)
17834 fprintf_unfiltered (gdb_stdlog
,
17835 "Read die from %s@0x%x of %s:\n",
17836 reader
->die_section
->get_name (),
17837 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17838 bfd_get_filename (reader
->abfd
));
17839 dump_die (die
, dwarf_die_debug
);
17845 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17847 The caller is responsible for filling in the extra attributes
17848 and updating (*DIEP)->num_attrs.
17849 Set DIEP to point to a newly allocated die with its information,
17850 except for its child, sibling, and parent fields. */
17852 static const gdb_byte
*
17853 read_full_die_1 (const struct die_reader_specs
*reader
,
17854 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17855 int num_extra_attrs
)
17857 unsigned int abbrev_number
, bytes_read
, i
;
17858 struct abbrev_info
*abbrev
;
17859 struct die_info
*die
;
17860 struct dwarf2_cu
*cu
= reader
->cu
;
17861 bfd
*abfd
= reader
->abfd
;
17863 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17864 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17865 info_ptr
+= bytes_read
;
17866 if (!abbrev_number
)
17872 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17874 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17876 bfd_get_filename (abfd
));
17878 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17879 die
->sect_off
= sect_off
;
17880 die
->tag
= abbrev
->tag
;
17881 die
->abbrev
= abbrev_number
;
17882 die
->has_children
= abbrev
->has_children
;
17884 /* Make the result usable.
17885 The caller needs to update num_attrs after adding the extra
17887 die
->num_attrs
= abbrev
->num_attrs
;
17889 std::vector
<int> indexes_that_need_reprocess
;
17890 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17892 bool need_reprocess
;
17894 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17895 info_ptr
, &need_reprocess
);
17896 if (need_reprocess
)
17897 indexes_that_need_reprocess
.push_back (i
);
17900 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17901 if (attr
!= nullptr)
17902 cu
->str_offsets_base
= DW_UNSND (attr
);
17904 attr
= die
->attr (DW_AT_loclists_base
);
17905 if (attr
!= nullptr)
17906 cu
->loclist_base
= DW_UNSND (attr
);
17908 auto maybe_addr_base
= die
->addr_base ();
17909 if (maybe_addr_base
.has_value ())
17910 cu
->addr_base
= *maybe_addr_base
;
17911 for (int index
: indexes_that_need_reprocess
)
17912 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
17917 /* Read a die and all its attributes.
17918 Set DIEP to point to a newly allocated die with its information,
17919 except for its child, sibling, and parent fields. */
17921 static const gdb_byte
*
17922 read_full_die (const struct die_reader_specs
*reader
,
17923 struct die_info
**diep
, const gdb_byte
*info_ptr
)
17925 const gdb_byte
*result
;
17927 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
17929 if (dwarf_die_debug
)
17931 fprintf_unfiltered (gdb_stdlog
,
17932 "Read die from %s@0x%x of %s:\n",
17933 reader
->die_section
->get_name (),
17934 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17935 bfd_get_filename (reader
->abfd
));
17936 dump_die (*diep
, dwarf_die_debug
);
17943 /* Returns nonzero if TAG represents a type that we might generate a partial
17947 is_type_tag_for_partial (int tag
)
17952 /* Some types that would be reasonable to generate partial symbols for,
17953 that we don't at present. */
17954 case DW_TAG_array_type
:
17955 case DW_TAG_file_type
:
17956 case DW_TAG_ptr_to_member_type
:
17957 case DW_TAG_set_type
:
17958 case DW_TAG_string_type
:
17959 case DW_TAG_subroutine_type
:
17961 case DW_TAG_base_type
:
17962 case DW_TAG_class_type
:
17963 case DW_TAG_interface_type
:
17964 case DW_TAG_enumeration_type
:
17965 case DW_TAG_structure_type
:
17966 case DW_TAG_subrange_type
:
17967 case DW_TAG_typedef
:
17968 case DW_TAG_union_type
:
17975 /* Load all DIEs that are interesting for partial symbols into memory. */
17977 static struct partial_die_info
*
17978 load_partial_dies (const struct die_reader_specs
*reader
,
17979 const gdb_byte
*info_ptr
, int building_psymtab
)
17981 struct dwarf2_cu
*cu
= reader
->cu
;
17982 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17983 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
17984 unsigned int bytes_read
;
17985 unsigned int load_all
= 0;
17986 int nesting_level
= 1;
17991 gdb_assert (cu
->per_cu
!= NULL
);
17992 if (cu
->per_cu
->load_all_dies
)
17996 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18000 &cu
->comp_unit_obstack
,
18001 hashtab_obstack_allocate
,
18002 dummy_obstack_deallocate
);
18006 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18008 /* A NULL abbrev means the end of a series of children. */
18009 if (abbrev
== NULL
)
18011 if (--nesting_level
== 0)
18014 info_ptr
+= bytes_read
;
18015 last_die
= parent_die
;
18016 parent_die
= parent_die
->die_parent
;
18020 /* Check for template arguments. We never save these; if
18021 they're seen, we just mark the parent, and go on our way. */
18022 if (parent_die
!= NULL
18023 && cu
->language
== language_cplus
18024 && (abbrev
->tag
== DW_TAG_template_type_param
18025 || abbrev
->tag
== DW_TAG_template_value_param
))
18027 parent_die
->has_template_arguments
= 1;
18031 /* We don't need a partial DIE for the template argument. */
18032 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18037 /* We only recurse into c++ subprograms looking for template arguments.
18038 Skip their other children. */
18040 && cu
->language
== language_cplus
18041 && parent_die
!= NULL
18042 && parent_die
->tag
== DW_TAG_subprogram
)
18044 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18048 /* Check whether this DIE is interesting enough to save. Normally
18049 we would not be interested in members here, but there may be
18050 later variables referencing them via DW_AT_specification (for
18051 static members). */
18053 && !is_type_tag_for_partial (abbrev
->tag
)
18054 && abbrev
->tag
!= DW_TAG_constant
18055 && abbrev
->tag
!= DW_TAG_enumerator
18056 && abbrev
->tag
!= DW_TAG_subprogram
18057 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18058 && abbrev
->tag
!= DW_TAG_lexical_block
18059 && abbrev
->tag
!= DW_TAG_variable
18060 && abbrev
->tag
!= DW_TAG_namespace
18061 && abbrev
->tag
!= DW_TAG_module
18062 && abbrev
->tag
!= DW_TAG_member
18063 && abbrev
->tag
!= DW_TAG_imported_unit
18064 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18066 /* Otherwise we skip to the next sibling, if any. */
18067 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18071 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18074 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18076 /* This two-pass algorithm for processing partial symbols has a
18077 high cost in cache pressure. Thus, handle some simple cases
18078 here which cover the majority of C partial symbols. DIEs
18079 which neither have specification tags in them, nor could have
18080 specification tags elsewhere pointing at them, can simply be
18081 processed and discarded.
18083 This segment is also optional; scan_partial_symbols and
18084 add_partial_symbol will handle these DIEs if we chain
18085 them in normally. When compilers which do not emit large
18086 quantities of duplicate debug information are more common,
18087 this code can probably be removed. */
18089 /* Any complete simple types at the top level (pretty much all
18090 of them, for a language without namespaces), can be processed
18092 if (parent_die
== NULL
18093 && pdi
.has_specification
== 0
18094 && pdi
.is_declaration
== 0
18095 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18096 || pdi
.tag
== DW_TAG_base_type
18097 || pdi
.tag
== DW_TAG_subrange_type
))
18099 if (building_psymtab
&& pdi
.name
!= NULL
)
18100 add_psymbol_to_list (pdi
.name
, false,
18101 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18102 psymbol_placement::STATIC
,
18103 0, cu
->language
, objfile
);
18104 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18108 /* The exception for DW_TAG_typedef with has_children above is
18109 a workaround of GCC PR debug/47510. In the case of this complaint
18110 type_name_or_error will error on such types later.
18112 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18113 it could not find the child DIEs referenced later, this is checked
18114 above. In correct DWARF DW_TAG_typedef should have no children. */
18116 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18117 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18118 "- DIE at %s [in module %s]"),
18119 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18121 /* If we're at the second level, and we're an enumerator, and
18122 our parent has no specification (meaning possibly lives in a
18123 namespace elsewhere), then we can add the partial symbol now
18124 instead of queueing it. */
18125 if (pdi
.tag
== DW_TAG_enumerator
18126 && parent_die
!= NULL
18127 && parent_die
->die_parent
== NULL
18128 && parent_die
->tag
== DW_TAG_enumeration_type
18129 && parent_die
->has_specification
== 0)
18131 if (pdi
.name
== NULL
)
18132 complaint (_("malformed enumerator DIE ignored"));
18133 else if (building_psymtab
)
18134 add_psymbol_to_list (pdi
.name
, false,
18135 VAR_DOMAIN
, LOC_CONST
, -1,
18136 cu
->language
== language_cplus
18137 ? psymbol_placement::GLOBAL
18138 : psymbol_placement::STATIC
,
18139 0, cu
->language
, objfile
);
18141 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18145 struct partial_die_info
*part_die
18146 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18148 /* We'll save this DIE so link it in. */
18149 part_die
->die_parent
= parent_die
;
18150 part_die
->die_sibling
= NULL
;
18151 part_die
->die_child
= NULL
;
18153 if (last_die
&& last_die
== parent_die
)
18154 last_die
->die_child
= part_die
;
18156 last_die
->die_sibling
= part_die
;
18158 last_die
= part_die
;
18160 if (first_die
== NULL
)
18161 first_die
= part_die
;
18163 /* Maybe add the DIE to the hash table. Not all DIEs that we
18164 find interesting need to be in the hash table, because we
18165 also have the parent/sibling/child chains; only those that we
18166 might refer to by offset later during partial symbol reading.
18168 For now this means things that might have be the target of a
18169 DW_AT_specification, DW_AT_abstract_origin, or
18170 DW_AT_extension. DW_AT_extension will refer only to
18171 namespaces; DW_AT_abstract_origin refers to functions (and
18172 many things under the function DIE, but we do not recurse
18173 into function DIEs during partial symbol reading) and
18174 possibly variables as well; DW_AT_specification refers to
18175 declarations. Declarations ought to have the DW_AT_declaration
18176 flag. It happens that GCC forgets to put it in sometimes, but
18177 only for functions, not for types.
18179 Adding more things than necessary to the hash table is harmless
18180 except for the performance cost. Adding too few will result in
18181 wasted time in find_partial_die, when we reread the compilation
18182 unit with load_all_dies set. */
18185 || abbrev
->tag
== DW_TAG_constant
18186 || abbrev
->tag
== DW_TAG_subprogram
18187 || abbrev
->tag
== DW_TAG_variable
18188 || abbrev
->tag
== DW_TAG_namespace
18189 || part_die
->is_declaration
)
18193 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18194 to_underlying (part_die
->sect_off
),
18199 /* For some DIEs we want to follow their children (if any). For C
18200 we have no reason to follow the children of structures; for other
18201 languages we have to, so that we can get at method physnames
18202 to infer fully qualified class names, for DW_AT_specification,
18203 and for C++ template arguments. For C++, we also look one level
18204 inside functions to find template arguments (if the name of the
18205 function does not already contain the template arguments).
18207 For Ada and Fortran, we need to scan the children of subprograms
18208 and lexical blocks as well because these languages allow the
18209 definition of nested entities that could be interesting for the
18210 debugger, such as nested subprograms for instance. */
18211 if (last_die
->has_children
18213 || last_die
->tag
== DW_TAG_namespace
18214 || last_die
->tag
== DW_TAG_module
18215 || last_die
->tag
== DW_TAG_enumeration_type
18216 || (cu
->language
== language_cplus
18217 && last_die
->tag
== DW_TAG_subprogram
18218 && (last_die
->name
== NULL
18219 || strchr (last_die
->name
, '<') == NULL
))
18220 || (cu
->language
!= language_c
18221 && (last_die
->tag
== DW_TAG_class_type
18222 || last_die
->tag
== DW_TAG_interface_type
18223 || last_die
->tag
== DW_TAG_structure_type
18224 || last_die
->tag
== DW_TAG_union_type
))
18225 || ((cu
->language
== language_ada
18226 || cu
->language
== language_fortran
)
18227 && (last_die
->tag
== DW_TAG_subprogram
18228 || last_die
->tag
== DW_TAG_lexical_block
))))
18231 parent_die
= last_die
;
18235 /* Otherwise we skip to the next sibling, if any. */
18236 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18238 /* Back to the top, do it again. */
18242 partial_die_info::partial_die_info (sect_offset sect_off_
,
18243 struct abbrev_info
*abbrev
)
18244 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18248 /* Read a minimal amount of information into the minimal die structure.
18249 INFO_PTR should point just after the initial uleb128 of a DIE. */
18252 partial_die_info::read (const struct die_reader_specs
*reader
,
18253 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18255 struct dwarf2_cu
*cu
= reader
->cu
;
18256 struct dwarf2_per_objfile
*dwarf2_per_objfile
18257 = cu
->per_cu
->dwarf2_per_objfile
;
18259 int has_low_pc_attr
= 0;
18260 int has_high_pc_attr
= 0;
18261 int high_pc_relative
= 0;
18263 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18266 bool need_reprocess
;
18267 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18268 info_ptr
, &need_reprocess
);
18269 /* String and address offsets that need to do the reprocessing have
18270 already been read at this point, so there is no need to wait until
18271 the loop terminates to do the reprocessing. */
18272 if (need_reprocess
)
18273 read_attribute_reprocess (reader
, &attr
);
18274 /* Store the data if it is of an attribute we want to keep in a
18275 partial symbol table. */
18281 case DW_TAG_compile_unit
:
18282 case DW_TAG_partial_unit
:
18283 case DW_TAG_type_unit
:
18284 /* Compilation units have a DW_AT_name that is a filename, not
18285 a source language identifier. */
18286 case DW_TAG_enumeration_type
:
18287 case DW_TAG_enumerator
:
18288 /* These tags always have simple identifiers already; no need
18289 to canonicalize them. */
18290 name
= DW_STRING (&attr
);
18294 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18297 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18302 case DW_AT_linkage_name
:
18303 case DW_AT_MIPS_linkage_name
:
18304 /* Note that both forms of linkage name might appear. We
18305 assume they will be the same, and we only store the last
18307 linkage_name
= attr
.value_as_string ();
18308 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18309 See https://github.com/rust-lang/rust/issues/32925. */
18310 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18311 && strchr (linkage_name
, '{') != NULL
)
18312 linkage_name
= NULL
;
18315 has_low_pc_attr
= 1;
18316 lowpc
= attr
.value_as_address ();
18318 case DW_AT_high_pc
:
18319 has_high_pc_attr
= 1;
18320 highpc
= attr
.value_as_address ();
18321 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18322 high_pc_relative
= 1;
18324 case DW_AT_location
:
18325 /* Support the .debug_loc offsets. */
18326 if (attr
.form_is_block ())
18328 d
.locdesc
= DW_BLOCK (&attr
);
18330 else if (attr
.form_is_section_offset ())
18332 dwarf2_complex_location_expr_complaint ();
18336 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18337 "partial symbol information");
18340 case DW_AT_external
:
18341 is_external
= DW_UNSND (&attr
);
18343 case DW_AT_declaration
:
18344 is_declaration
= DW_UNSND (&attr
);
18349 case DW_AT_abstract_origin
:
18350 case DW_AT_specification
:
18351 case DW_AT_extension
:
18352 has_specification
= 1;
18353 spec_offset
= attr
.get_ref_die_offset ();
18354 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18355 || cu
->per_cu
->is_dwz
);
18357 case DW_AT_sibling
:
18358 /* Ignore absolute siblings, they might point outside of
18359 the current compile unit. */
18360 if (attr
.form
== DW_FORM_ref_addr
)
18361 complaint (_("ignoring absolute DW_AT_sibling"));
18364 const gdb_byte
*buffer
= reader
->buffer
;
18365 sect_offset off
= attr
.get_ref_die_offset ();
18366 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18368 if (sibling_ptr
< info_ptr
)
18369 complaint (_("DW_AT_sibling points backwards"));
18370 else if (sibling_ptr
> reader
->buffer_end
)
18371 reader
->die_section
->overflow_complaint ();
18373 sibling
= sibling_ptr
;
18376 case DW_AT_byte_size
:
18379 case DW_AT_const_value
:
18380 has_const_value
= 1;
18382 case DW_AT_calling_convention
:
18383 /* DWARF doesn't provide a way to identify a program's source-level
18384 entry point. DW_AT_calling_convention attributes are only meant
18385 to describe functions' calling conventions.
18387 However, because it's a necessary piece of information in
18388 Fortran, and before DWARF 4 DW_CC_program was the only
18389 piece of debugging information whose definition refers to
18390 a 'main program' at all, several compilers marked Fortran
18391 main programs with DW_CC_program --- even when those
18392 functions use the standard calling conventions.
18394 Although DWARF now specifies a way to provide this
18395 information, we support this practice for backward
18397 if (DW_UNSND (&attr
) == DW_CC_program
18398 && cu
->language
== language_fortran
)
18399 main_subprogram
= 1;
18402 if (DW_UNSND (&attr
) == DW_INL_inlined
18403 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18404 may_be_inlined
= 1;
18408 if (tag
== DW_TAG_imported_unit
)
18410 d
.sect_off
= attr
.get_ref_die_offset ();
18411 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18412 || cu
->per_cu
->is_dwz
);
18416 case DW_AT_main_subprogram
:
18417 main_subprogram
= DW_UNSND (&attr
);
18422 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18423 but that requires a full DIE, so instead we just
18425 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18426 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18427 + (need_ranges_base
18431 /* Value of the DW_AT_ranges attribute is the offset in the
18432 .debug_ranges section. */
18433 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18444 /* For Ada, if both the name and the linkage name appear, we prefer
18445 the latter. This lets "catch exception" work better, regardless
18446 of the order in which the name and linkage name were emitted.
18447 Really, though, this is just a workaround for the fact that gdb
18448 doesn't store both the name and the linkage name. */
18449 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18450 name
= linkage_name
;
18452 if (high_pc_relative
)
18455 if (has_low_pc_attr
&& has_high_pc_attr
)
18457 /* When using the GNU linker, .gnu.linkonce. sections are used to
18458 eliminate duplicate copies of functions and vtables and such.
18459 The linker will arbitrarily choose one and discard the others.
18460 The AT_*_pc values for such functions refer to local labels in
18461 these sections. If the section from that file was discarded, the
18462 labels are not in the output, so the relocs get a value of 0.
18463 If this is a discarded function, mark the pc bounds as invalid,
18464 so that GDB will ignore it. */
18465 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18467 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18468 struct gdbarch
*gdbarch
= objfile
->arch ();
18470 complaint (_("DW_AT_low_pc %s is zero "
18471 "for DIE at %s [in module %s]"),
18472 paddress (gdbarch
, lowpc
),
18473 sect_offset_str (sect_off
),
18474 objfile_name (objfile
));
18476 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18477 else if (lowpc
>= highpc
)
18479 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18480 struct gdbarch
*gdbarch
= objfile
->arch ();
18482 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18483 "for DIE at %s [in module %s]"),
18484 paddress (gdbarch
, lowpc
),
18485 paddress (gdbarch
, highpc
),
18486 sect_offset_str (sect_off
),
18487 objfile_name (objfile
));
18496 /* Find a cached partial DIE at OFFSET in CU. */
18498 struct partial_die_info
*
18499 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18501 struct partial_die_info
*lookup_die
= NULL
;
18502 struct partial_die_info
part_die (sect_off
);
18504 lookup_die
= ((struct partial_die_info
*)
18505 htab_find_with_hash (partial_dies
, &part_die
,
18506 to_underlying (sect_off
)));
18511 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18512 except in the case of .debug_types DIEs which do not reference
18513 outside their CU (they do however referencing other types via
18514 DW_FORM_ref_sig8). */
18516 static const struct cu_partial_die_info
18517 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18519 struct dwarf2_per_objfile
*dwarf2_per_objfile
18520 = cu
->per_cu
->dwarf2_per_objfile
;
18521 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18522 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18523 struct partial_die_info
*pd
= NULL
;
18525 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18526 && cu
->header
.offset_in_cu_p (sect_off
))
18528 pd
= cu
->find_partial_die (sect_off
);
18531 /* We missed recording what we needed.
18532 Load all dies and try again. */
18533 per_cu
= cu
->per_cu
;
18537 /* TUs don't reference other CUs/TUs (except via type signatures). */
18538 if (cu
->per_cu
->is_debug_types
)
18540 error (_("Dwarf Error: Type Unit at offset %s contains"
18541 " external reference to offset %s [in module %s].\n"),
18542 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18543 bfd_get_filename (objfile
->obfd
));
18545 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18546 dwarf2_per_objfile
);
18548 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18549 load_partial_comp_unit (per_cu
);
18551 per_cu
->cu
->last_used
= 0;
18552 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18555 /* If we didn't find it, and not all dies have been loaded,
18556 load them all and try again. */
18558 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18560 per_cu
->load_all_dies
= 1;
18562 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18563 THIS_CU->cu may already be in use. So we can't just free it and
18564 replace its DIEs with the ones we read in. Instead, we leave those
18565 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18566 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18568 load_partial_comp_unit (per_cu
);
18570 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18574 internal_error (__FILE__
, __LINE__
,
18575 _("could not find partial DIE %s "
18576 "in cache [from module %s]\n"),
18577 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18578 return { per_cu
->cu
, pd
};
18581 /* See if we can figure out if the class lives in a namespace. We do
18582 this by looking for a member function; its demangled name will
18583 contain namespace info, if there is any. */
18586 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18587 struct dwarf2_cu
*cu
)
18589 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18590 what template types look like, because the demangler
18591 frequently doesn't give the same name as the debug info. We
18592 could fix this by only using the demangled name to get the
18593 prefix (but see comment in read_structure_type). */
18595 struct partial_die_info
*real_pdi
;
18596 struct partial_die_info
*child_pdi
;
18598 /* If this DIE (this DIE's specification, if any) has a parent, then
18599 we should not do this. We'll prepend the parent's fully qualified
18600 name when we create the partial symbol. */
18602 real_pdi
= struct_pdi
;
18603 while (real_pdi
->has_specification
)
18605 auto res
= find_partial_die (real_pdi
->spec_offset
,
18606 real_pdi
->spec_is_dwz
, cu
);
18607 real_pdi
= res
.pdi
;
18611 if (real_pdi
->die_parent
!= NULL
)
18614 for (child_pdi
= struct_pdi
->die_child
;
18616 child_pdi
= child_pdi
->die_sibling
)
18618 if (child_pdi
->tag
== DW_TAG_subprogram
18619 && child_pdi
->linkage_name
!= NULL
)
18621 gdb::unique_xmalloc_ptr
<char> actual_class_name
18622 (language_class_name_from_physname (cu
->language_defn
,
18623 child_pdi
->linkage_name
));
18624 if (actual_class_name
!= NULL
)
18626 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18627 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18634 /* Return true if a DIE with TAG may have the DW_AT_const_value
18638 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18642 case DW_TAG_constant
:
18643 case DW_TAG_enumerator
:
18644 case DW_TAG_formal_parameter
:
18645 case DW_TAG_template_value_param
:
18646 case DW_TAG_variable
:
18654 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18656 /* Once we've fixed up a die, there's no point in doing so again.
18657 This also avoids a memory leak if we were to call
18658 guess_partial_die_structure_name multiple times. */
18662 /* If we found a reference attribute and the DIE has no name, try
18663 to find a name in the referred to DIE. */
18665 if (name
== NULL
&& has_specification
)
18667 struct partial_die_info
*spec_die
;
18669 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18670 spec_die
= res
.pdi
;
18673 spec_die
->fixup (cu
);
18675 if (spec_die
->name
)
18677 name
= spec_die
->name
;
18679 /* Copy DW_AT_external attribute if it is set. */
18680 if (spec_die
->is_external
)
18681 is_external
= spec_die
->is_external
;
18685 if (!has_const_value
&& has_specification
18686 && can_have_DW_AT_const_value_p (tag
))
18688 struct partial_die_info
*spec_die
;
18690 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18691 spec_die
= res
.pdi
;
18694 spec_die
->fixup (cu
);
18696 if (spec_die
->has_const_value
)
18698 /* Copy DW_AT_const_value attribute if it is set. */
18699 has_const_value
= spec_die
->has_const_value
;
18703 /* Set default names for some unnamed DIEs. */
18705 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18706 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18708 /* If there is no parent die to provide a namespace, and there are
18709 children, see if we can determine the namespace from their linkage
18711 if (cu
->language
== language_cplus
18712 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18713 && die_parent
== NULL
18715 && (tag
== DW_TAG_class_type
18716 || tag
== DW_TAG_structure_type
18717 || tag
== DW_TAG_union_type
))
18718 guess_partial_die_structure_name (this, cu
);
18720 /* GCC might emit a nameless struct or union that has a linkage
18721 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18723 && (tag
== DW_TAG_class_type
18724 || tag
== DW_TAG_interface_type
18725 || tag
== DW_TAG_structure_type
18726 || tag
== DW_TAG_union_type
)
18727 && linkage_name
!= NULL
)
18729 gdb::unique_xmalloc_ptr
<char> demangled
18730 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18731 if (demangled
!= nullptr)
18735 /* Strip any leading namespaces/classes, keep only the base name.
18736 DW_AT_name for named DIEs does not contain the prefixes. */
18737 base
= strrchr (demangled
.get (), ':');
18738 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18741 base
= demangled
.get ();
18743 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18744 name
= objfile
->intern (base
);
18751 /* Read the .debug_loclists header contents from the given SECTION in the
18754 read_loclist_header (struct loclist_header
*header
,
18755 struct dwarf2_section_info
*section
)
18757 unsigned int bytes_read
;
18758 bfd
*abfd
= section
->get_bfd_owner ();
18759 const gdb_byte
*info_ptr
= section
->buffer
;
18760 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18761 info_ptr
+= bytes_read
;
18762 header
->version
= read_2_bytes (abfd
, info_ptr
);
18764 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18766 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18768 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18771 /* Return the DW_AT_loclists_base value for the CU. */
18773 lookup_loclist_base (struct dwarf2_cu
*cu
)
18775 /* For the .dwo unit, the loclist_base points to the first offset following
18776 the header. The header consists of the following entities-
18777 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18779 2. version (2 bytes)
18780 3. address size (1 byte)
18781 4. segment selector size (1 byte)
18782 5. offset entry count (4 bytes)
18783 These sizes are derived as per the DWARFv5 standard. */
18784 if (cu
->dwo_unit
!= nullptr)
18786 if (cu
->header
.initial_length_size
== 4)
18787 return LOCLIST_HEADER_SIZE32
;
18788 return LOCLIST_HEADER_SIZE64
;
18790 return cu
->loclist_base
;
18793 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18794 array of offsets in the .debug_loclists section. */
18796 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18798 struct dwarf2_per_objfile
*dwarf2_per_objfile
18799 = cu
->per_cu
->dwarf2_per_objfile
;
18800 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18801 bfd
*abfd
= objfile
->obfd
;
18802 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18803 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18805 section
->read (objfile
);
18806 if (section
->buffer
== NULL
)
18807 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18808 "section [in module %s]"), objfile_name (objfile
));
18809 struct loclist_header header
;
18810 read_loclist_header (&header
, section
);
18811 if (loclist_index
>= header
.offset_entry_count
)
18812 complaint (_("DW_FORM_loclistx pointing outside of "
18813 ".debug_loclists offset array [in module %s]"),
18814 objfile_name (objfile
));
18815 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18817 complaint (_("DW_FORM_loclistx pointing outside of "
18818 ".debug_loclists section [in module %s]"),
18819 objfile_name (objfile
));
18820 const gdb_byte
*info_ptr
18821 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18823 if (cu
->header
.offset_size
== 4)
18824 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18826 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18829 /* Process the attributes that had to be skipped in the first round. These
18830 attributes are the ones that need str_offsets_base or addr_base attributes.
18831 They could not have been processed in the first round, because at the time
18832 the values of str_offsets_base or addr_base may not have been known. */
18834 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18835 struct attribute
*attr
)
18837 struct dwarf2_cu
*cu
= reader
->cu
;
18838 switch (attr
->form
)
18840 case DW_FORM_addrx
:
18841 case DW_FORM_GNU_addr_index
:
18842 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18844 case DW_FORM_loclistx
:
18845 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18848 case DW_FORM_strx1
:
18849 case DW_FORM_strx2
:
18850 case DW_FORM_strx3
:
18851 case DW_FORM_strx4
:
18852 case DW_FORM_GNU_str_index
:
18854 unsigned int str_index
= DW_UNSND (attr
);
18855 if (reader
->dwo_file
!= NULL
)
18857 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18858 DW_STRING_IS_CANONICAL (attr
) = 0;
18862 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18863 DW_STRING_IS_CANONICAL (attr
) = 0;
18868 gdb_assert_not_reached (_("Unexpected DWARF form."));
18872 /* Read an attribute value described by an attribute form. */
18874 static const gdb_byte
*
18875 read_attribute_value (const struct die_reader_specs
*reader
,
18876 struct attribute
*attr
, unsigned form
,
18877 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18878 bool *need_reprocess
)
18880 struct dwarf2_cu
*cu
= reader
->cu
;
18881 struct dwarf2_per_objfile
*dwarf2_per_objfile
18882 = cu
->per_cu
->dwarf2_per_objfile
;
18883 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18884 bfd
*abfd
= reader
->abfd
;
18885 struct comp_unit_head
*cu_header
= &cu
->header
;
18886 unsigned int bytes_read
;
18887 struct dwarf_block
*blk
;
18888 *need_reprocess
= false;
18890 attr
->form
= (enum dwarf_form
) form
;
18893 case DW_FORM_ref_addr
:
18894 if (cu
->header
.version
== 2)
18895 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18898 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18900 info_ptr
+= bytes_read
;
18902 case DW_FORM_GNU_ref_alt
:
18903 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18904 info_ptr
+= bytes_read
;
18908 struct gdbarch
*gdbarch
= objfile
->arch ();
18909 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18910 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18911 info_ptr
+= bytes_read
;
18914 case DW_FORM_block2
:
18915 blk
= dwarf_alloc_block (cu
);
18916 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18918 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18919 info_ptr
+= blk
->size
;
18920 DW_BLOCK (attr
) = blk
;
18922 case DW_FORM_block4
:
18923 blk
= dwarf_alloc_block (cu
);
18924 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18926 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18927 info_ptr
+= blk
->size
;
18928 DW_BLOCK (attr
) = blk
;
18930 case DW_FORM_data2
:
18931 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18934 case DW_FORM_data4
:
18935 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18938 case DW_FORM_data8
:
18939 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18942 case DW_FORM_data16
:
18943 blk
= dwarf_alloc_block (cu
);
18945 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18947 DW_BLOCK (attr
) = blk
;
18949 case DW_FORM_sec_offset
:
18950 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18951 info_ptr
+= bytes_read
;
18953 case DW_FORM_loclistx
:
18955 *need_reprocess
= true;
18956 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18957 info_ptr
+= bytes_read
;
18960 case DW_FORM_string
:
18961 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18962 DW_STRING_IS_CANONICAL (attr
) = 0;
18963 info_ptr
+= bytes_read
;
18966 if (!cu
->per_cu
->is_dwz
)
18968 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18969 abfd
, info_ptr
, cu_header
,
18971 DW_STRING_IS_CANONICAL (attr
) = 0;
18972 info_ptr
+= bytes_read
;
18976 case DW_FORM_line_strp
:
18977 if (!cu
->per_cu
->is_dwz
)
18980 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
18982 DW_STRING_IS_CANONICAL (attr
) = 0;
18983 info_ptr
+= bytes_read
;
18987 case DW_FORM_GNU_strp_alt
:
18989 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18990 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
18993 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
18994 DW_STRING_IS_CANONICAL (attr
) = 0;
18995 info_ptr
+= bytes_read
;
18998 case DW_FORM_exprloc
:
18999 case DW_FORM_block
:
19000 blk
= dwarf_alloc_block (cu
);
19001 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19002 info_ptr
+= bytes_read
;
19003 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19004 info_ptr
+= blk
->size
;
19005 DW_BLOCK (attr
) = blk
;
19007 case DW_FORM_block1
:
19008 blk
= dwarf_alloc_block (cu
);
19009 blk
->size
= read_1_byte (abfd
, info_ptr
);
19011 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19012 info_ptr
+= blk
->size
;
19013 DW_BLOCK (attr
) = blk
;
19015 case DW_FORM_data1
:
19016 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19020 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19023 case DW_FORM_flag_present
:
19024 DW_UNSND (attr
) = 1;
19026 case DW_FORM_sdata
:
19027 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19028 info_ptr
+= bytes_read
;
19030 case DW_FORM_udata
:
19031 case DW_FORM_rnglistx
:
19032 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19033 info_ptr
+= bytes_read
;
19036 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19037 + read_1_byte (abfd
, info_ptr
));
19041 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19042 + read_2_bytes (abfd
, info_ptr
));
19046 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19047 + read_4_bytes (abfd
, info_ptr
));
19051 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19052 + read_8_bytes (abfd
, info_ptr
));
19055 case DW_FORM_ref_sig8
:
19056 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19059 case DW_FORM_ref_udata
:
19060 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19061 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19062 info_ptr
+= bytes_read
;
19064 case DW_FORM_indirect
:
19065 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19066 info_ptr
+= bytes_read
;
19067 if (form
== DW_FORM_implicit_const
)
19069 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19070 info_ptr
+= bytes_read
;
19072 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19073 info_ptr
, need_reprocess
);
19075 case DW_FORM_implicit_const
:
19076 DW_SND (attr
) = implicit_const
;
19078 case DW_FORM_addrx
:
19079 case DW_FORM_GNU_addr_index
:
19080 *need_reprocess
= true;
19081 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19082 info_ptr
+= bytes_read
;
19085 case DW_FORM_strx1
:
19086 case DW_FORM_strx2
:
19087 case DW_FORM_strx3
:
19088 case DW_FORM_strx4
:
19089 case DW_FORM_GNU_str_index
:
19091 ULONGEST str_index
;
19092 if (form
== DW_FORM_strx1
)
19094 str_index
= read_1_byte (abfd
, info_ptr
);
19097 else if (form
== DW_FORM_strx2
)
19099 str_index
= read_2_bytes (abfd
, info_ptr
);
19102 else if (form
== DW_FORM_strx3
)
19104 str_index
= read_3_bytes (abfd
, info_ptr
);
19107 else if (form
== DW_FORM_strx4
)
19109 str_index
= read_4_bytes (abfd
, info_ptr
);
19114 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19115 info_ptr
+= bytes_read
;
19117 *need_reprocess
= true;
19118 DW_UNSND (attr
) = str_index
;
19122 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19123 dwarf_form_name (form
),
19124 bfd_get_filename (abfd
));
19128 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19129 attr
->form
= DW_FORM_GNU_ref_alt
;
19131 /* We have seen instances where the compiler tried to emit a byte
19132 size attribute of -1 which ended up being encoded as an unsigned
19133 0xffffffff. Although 0xffffffff is technically a valid size value,
19134 an object of this size seems pretty unlikely so we can relatively
19135 safely treat these cases as if the size attribute was invalid and
19136 treat them as zero by default. */
19137 if (attr
->name
== DW_AT_byte_size
19138 && form
== DW_FORM_data4
19139 && DW_UNSND (attr
) >= 0xffffffff)
19142 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19143 hex_string (DW_UNSND (attr
)));
19144 DW_UNSND (attr
) = 0;
19150 /* Read an attribute described by an abbreviated attribute. */
19152 static const gdb_byte
*
19153 read_attribute (const struct die_reader_specs
*reader
,
19154 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19155 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19157 attr
->name
= abbrev
->name
;
19158 return read_attribute_value (reader
, attr
, abbrev
->form
,
19159 abbrev
->implicit_const
, info_ptr
,
19163 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19165 static const char *
19166 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19167 LONGEST str_offset
)
19169 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
19170 str_offset
, "DW_FORM_strp");
19173 /* Return pointer to string at .debug_str offset as read from BUF.
19174 BUF is assumed to be in a compilation unit described by CU_HEADER.
19175 Return *BYTES_READ_PTR count of bytes read from BUF. */
19177 static const char *
19178 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19179 const gdb_byte
*buf
,
19180 const struct comp_unit_head
*cu_header
,
19181 unsigned int *bytes_read_ptr
)
19183 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19185 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19191 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19192 const struct comp_unit_head
*cu_header
,
19193 unsigned int *bytes_read_ptr
)
19195 bfd
*abfd
= objfile
->obfd
;
19196 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19198 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19201 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19202 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19203 ADDR_SIZE is the size of addresses from the CU header. */
19206 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19207 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19210 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19211 bfd
*abfd
= objfile
->obfd
;
19212 const gdb_byte
*info_ptr
;
19213 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19215 dwarf2_per_objfile
->addr
.read (objfile
);
19216 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19217 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19218 objfile_name (objfile
));
19219 if (addr_base_or_zero
+ addr_index
* addr_size
19220 >= dwarf2_per_objfile
->addr
.size
)
19221 error (_("DW_FORM_addr_index pointing outside of "
19222 ".debug_addr section [in module %s]"),
19223 objfile_name (objfile
));
19224 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19225 + addr_base_or_zero
+ addr_index
* addr_size
);
19226 if (addr_size
== 4)
19227 return bfd_get_32 (abfd
, info_ptr
);
19229 return bfd_get_64 (abfd
, info_ptr
);
19232 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19235 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19237 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19238 cu
->addr_base
, cu
->header
.addr_size
);
19241 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19244 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19245 unsigned int *bytes_read
)
19247 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19248 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19250 return read_addr_index (cu
, addr_index
);
19256 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19258 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19259 struct dwarf2_cu
*cu
= per_cu
->cu
;
19260 gdb::optional
<ULONGEST
> addr_base
;
19263 /* We need addr_base and addr_size.
19264 If we don't have PER_CU->cu, we have to get it.
19265 Nasty, but the alternative is storing the needed info in PER_CU,
19266 which at this point doesn't seem justified: it's not clear how frequently
19267 it would get used and it would increase the size of every PER_CU.
19268 Entry points like dwarf2_per_cu_addr_size do a similar thing
19269 so we're not in uncharted territory here.
19270 Alas we need to be a bit more complicated as addr_base is contained
19273 We don't need to read the entire CU(/TU).
19274 We just need the header and top level die.
19276 IWBN to use the aging mechanism to let us lazily later discard the CU.
19277 For now we skip this optimization. */
19281 addr_base
= cu
->addr_base
;
19282 addr_size
= cu
->header
.addr_size
;
19286 cutu_reader
reader (per_cu
, NULL
, 0, false);
19287 addr_base
= reader
.cu
->addr_base
;
19288 addr_size
= reader
.cu
->header
.addr_size
;
19291 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19295 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19296 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19299 static const char *
19300 read_str_index (struct dwarf2_cu
*cu
,
19301 struct dwarf2_section_info
*str_section
,
19302 struct dwarf2_section_info
*str_offsets_section
,
19303 ULONGEST str_offsets_base
, ULONGEST str_index
)
19305 struct dwarf2_per_objfile
*dwarf2_per_objfile
19306 = cu
->per_cu
->dwarf2_per_objfile
;
19307 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19308 const char *objf_name
= objfile_name (objfile
);
19309 bfd
*abfd
= objfile
->obfd
;
19310 const gdb_byte
*info_ptr
;
19311 ULONGEST str_offset
;
19312 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19314 str_section
->read (objfile
);
19315 str_offsets_section
->read (objfile
);
19316 if (str_section
->buffer
== NULL
)
19317 error (_("%s used without %s section"
19318 " in CU at offset %s [in module %s]"),
19319 form_name
, str_section
->get_name (),
19320 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19321 if (str_offsets_section
->buffer
== NULL
)
19322 error (_("%s used without %s section"
19323 " in CU at offset %s [in module %s]"),
19324 form_name
, str_section
->get_name (),
19325 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19326 info_ptr
= (str_offsets_section
->buffer
19328 + str_index
* cu
->header
.offset_size
);
19329 if (cu
->header
.offset_size
== 4)
19330 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19332 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19333 if (str_offset
>= str_section
->size
)
19334 error (_("Offset from %s pointing outside of"
19335 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19336 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19337 return (const char *) (str_section
->buffer
+ str_offset
);
19340 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19342 static const char *
19343 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19345 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19346 ? reader
->cu
->header
.addr_size
: 0;
19347 return read_str_index (reader
->cu
,
19348 &reader
->dwo_file
->sections
.str
,
19349 &reader
->dwo_file
->sections
.str_offsets
,
19350 str_offsets_base
, str_index
);
19353 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19355 static const char *
19356 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19358 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19359 const char *objf_name
= objfile_name (objfile
);
19360 static const char form_name
[] = "DW_FORM_GNU_str_index";
19361 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19363 if (!cu
->str_offsets_base
.has_value ())
19364 error (_("%s used in Fission stub without %s"
19365 " in CU at offset 0x%lx [in module %s]"),
19366 form_name
, str_offsets_attr_name
,
19367 (long) cu
->header
.offset_size
, objf_name
);
19369 return read_str_index (cu
,
19370 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19371 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19372 *cu
->str_offsets_base
, str_index
);
19375 /* Return the length of an LEB128 number in BUF. */
19378 leb128_size (const gdb_byte
*buf
)
19380 const gdb_byte
*begin
= buf
;
19386 if ((byte
& 128) == 0)
19387 return buf
- begin
;
19392 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19401 cu
->language
= language_c
;
19404 case DW_LANG_C_plus_plus
:
19405 case DW_LANG_C_plus_plus_11
:
19406 case DW_LANG_C_plus_plus_14
:
19407 cu
->language
= language_cplus
;
19410 cu
->language
= language_d
;
19412 case DW_LANG_Fortran77
:
19413 case DW_LANG_Fortran90
:
19414 case DW_LANG_Fortran95
:
19415 case DW_LANG_Fortran03
:
19416 case DW_LANG_Fortran08
:
19417 cu
->language
= language_fortran
;
19420 cu
->language
= language_go
;
19422 case DW_LANG_Mips_Assembler
:
19423 cu
->language
= language_asm
;
19425 case DW_LANG_Ada83
:
19426 case DW_LANG_Ada95
:
19427 cu
->language
= language_ada
;
19429 case DW_LANG_Modula2
:
19430 cu
->language
= language_m2
;
19432 case DW_LANG_Pascal83
:
19433 cu
->language
= language_pascal
;
19436 cu
->language
= language_objc
;
19439 case DW_LANG_Rust_old
:
19440 cu
->language
= language_rust
;
19442 case DW_LANG_Cobol74
:
19443 case DW_LANG_Cobol85
:
19445 cu
->language
= language_minimal
;
19448 cu
->language_defn
= language_def (cu
->language
);
19451 /* Return the named attribute or NULL if not there. */
19453 static struct attribute
*
19454 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19459 struct attribute
*spec
= NULL
;
19461 for (i
= 0; i
< die
->num_attrs
; ++i
)
19463 if (die
->attrs
[i
].name
== name
)
19464 return &die
->attrs
[i
];
19465 if (die
->attrs
[i
].name
== DW_AT_specification
19466 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19467 spec
= &die
->attrs
[i
];
19473 die
= follow_die_ref (die
, spec
, &cu
);
19479 /* Return the string associated with a string-typed attribute, or NULL if it
19480 is either not found or is of an incorrect type. */
19482 static const char *
19483 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19485 struct attribute
*attr
;
19486 const char *str
= NULL
;
19488 attr
= dwarf2_attr (die
, name
, cu
);
19492 str
= attr
->value_as_string ();
19493 if (str
== nullptr)
19494 complaint (_("string type expected for attribute %s for "
19495 "DIE at %s in module %s"),
19496 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19497 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19503 /* Return the dwo name or NULL if not present. If present, it is in either
19504 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19505 static const char *
19506 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19508 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19509 if (dwo_name
== nullptr)
19510 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19514 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19515 and holds a non-zero value. This function should only be used for
19516 DW_FORM_flag or DW_FORM_flag_present attributes. */
19519 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19521 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19523 return (attr
&& DW_UNSND (attr
));
19527 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19529 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19530 which value is non-zero. However, we have to be careful with
19531 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19532 (via dwarf2_flag_true_p) follows this attribute. So we may
19533 end up accidently finding a declaration attribute that belongs
19534 to a different DIE referenced by the specification attribute,
19535 even though the given DIE does not have a declaration attribute. */
19536 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19537 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19540 /* Return the die giving the specification for DIE, if there is
19541 one. *SPEC_CU is the CU containing DIE on input, and the CU
19542 containing the return value on output. If there is no
19543 specification, but there is an abstract origin, that is
19546 static struct die_info
*
19547 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19549 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19552 if (spec_attr
== NULL
)
19553 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19555 if (spec_attr
== NULL
)
19558 return follow_die_ref (die
, spec_attr
, spec_cu
);
19561 /* Stub for free_line_header to match void * callback types. */
19564 free_line_header_voidp (void *arg
)
19566 struct line_header
*lh
= (struct line_header
*) arg
;
19571 /* A convenience function to find the proper .debug_line section for a CU. */
19573 static struct dwarf2_section_info
*
19574 get_debug_line_section (struct dwarf2_cu
*cu
)
19576 struct dwarf2_section_info
*section
;
19577 struct dwarf2_per_objfile
*dwarf2_per_objfile
19578 = cu
->per_cu
->dwarf2_per_objfile
;
19580 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19582 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19583 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19584 else if (cu
->per_cu
->is_dwz
)
19586 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19588 section
= &dwz
->line
;
19591 section
= &dwarf2_per_objfile
->line
;
19596 /* Read the statement program header starting at OFFSET in
19597 .debug_line, or .debug_line.dwo. Return a pointer
19598 to a struct line_header, allocated using xmalloc.
19599 Returns NULL if there is a problem reading the header, e.g., if it
19600 has a version we don't understand.
19602 NOTE: the strings in the include directory and file name tables of
19603 the returned object point into the dwarf line section buffer,
19604 and must not be freed. */
19606 static line_header_up
19607 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19609 struct dwarf2_section_info
*section
;
19610 struct dwarf2_per_objfile
*dwarf2_per_objfile
19611 = cu
->per_cu
->dwarf2_per_objfile
;
19613 section
= get_debug_line_section (cu
);
19614 section
->read (dwarf2_per_objfile
->objfile
);
19615 if (section
->buffer
== NULL
)
19617 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19618 complaint (_("missing .debug_line.dwo section"));
19620 complaint (_("missing .debug_line section"));
19624 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19625 dwarf2_per_objfile
, section
,
19629 /* Subroutine of dwarf_decode_lines to simplify it.
19630 Return the file name of the psymtab for the given file_entry.
19631 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19632 If space for the result is malloc'd, *NAME_HOLDER will be set.
19633 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19635 static const char *
19636 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19637 const dwarf2_psymtab
*pst
,
19638 const char *comp_dir
,
19639 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19641 const char *include_name
= fe
.name
;
19642 const char *include_name_to_compare
= include_name
;
19643 const char *pst_filename
;
19646 const char *dir_name
= fe
.include_dir (lh
);
19648 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19649 if (!IS_ABSOLUTE_PATH (include_name
)
19650 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19652 /* Avoid creating a duplicate psymtab for PST.
19653 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19654 Before we do the comparison, however, we need to account
19655 for DIR_NAME and COMP_DIR.
19656 First prepend dir_name (if non-NULL). If we still don't
19657 have an absolute path prepend comp_dir (if non-NULL).
19658 However, the directory we record in the include-file's
19659 psymtab does not contain COMP_DIR (to match the
19660 corresponding symtab(s)).
19665 bash$ gcc -g ./hello.c
19666 include_name = "hello.c"
19668 DW_AT_comp_dir = comp_dir = "/tmp"
19669 DW_AT_name = "./hello.c"
19673 if (dir_name
!= NULL
)
19675 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19676 include_name
, (char *) NULL
));
19677 include_name
= name_holder
->get ();
19678 include_name_to_compare
= include_name
;
19680 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19682 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19683 include_name
, (char *) NULL
));
19684 include_name_to_compare
= hold_compare
.get ();
19688 pst_filename
= pst
->filename
;
19689 gdb::unique_xmalloc_ptr
<char> copied_name
;
19690 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19692 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19693 pst_filename
, (char *) NULL
));
19694 pst_filename
= copied_name
.get ();
19697 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19701 return include_name
;
19704 /* State machine to track the state of the line number program. */
19706 class lnp_state_machine
19709 /* Initialize a machine state for the start of a line number
19711 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19712 bool record_lines_p
);
19714 file_entry
*current_file ()
19716 /* lh->file_names is 0-based, but the file name numbers in the
19717 statement program are 1-based. */
19718 return m_line_header
->file_name_at (m_file
);
19721 /* Record the line in the state machine. END_SEQUENCE is true if
19722 we're processing the end of a sequence. */
19723 void record_line (bool end_sequence
);
19725 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19726 nop-out rest of the lines in this sequence. */
19727 void check_line_address (struct dwarf2_cu
*cu
,
19728 const gdb_byte
*line_ptr
,
19729 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19731 void handle_set_discriminator (unsigned int discriminator
)
19733 m_discriminator
= discriminator
;
19734 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19737 /* Handle DW_LNE_set_address. */
19738 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19741 address
+= baseaddr
;
19742 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19745 /* Handle DW_LNS_advance_pc. */
19746 void handle_advance_pc (CORE_ADDR adjust
);
19748 /* Handle a special opcode. */
19749 void handle_special_opcode (unsigned char op_code
);
19751 /* Handle DW_LNS_advance_line. */
19752 void handle_advance_line (int line_delta
)
19754 advance_line (line_delta
);
19757 /* Handle DW_LNS_set_file. */
19758 void handle_set_file (file_name_index file
);
19760 /* Handle DW_LNS_negate_stmt. */
19761 void handle_negate_stmt ()
19763 m_is_stmt
= !m_is_stmt
;
19766 /* Handle DW_LNS_const_add_pc. */
19767 void handle_const_add_pc ();
19769 /* Handle DW_LNS_fixed_advance_pc. */
19770 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19772 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19776 /* Handle DW_LNS_copy. */
19777 void handle_copy ()
19779 record_line (false);
19780 m_discriminator
= 0;
19783 /* Handle DW_LNE_end_sequence. */
19784 void handle_end_sequence ()
19786 m_currently_recording_lines
= true;
19790 /* Advance the line by LINE_DELTA. */
19791 void advance_line (int line_delta
)
19793 m_line
+= line_delta
;
19795 if (line_delta
!= 0)
19796 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19799 struct dwarf2_cu
*m_cu
;
19801 gdbarch
*m_gdbarch
;
19803 /* True if we're recording lines.
19804 Otherwise we're building partial symtabs and are just interested in
19805 finding include files mentioned by the line number program. */
19806 bool m_record_lines_p
;
19808 /* The line number header. */
19809 line_header
*m_line_header
;
19811 /* These are part of the standard DWARF line number state machine,
19812 and initialized according to the DWARF spec. */
19814 unsigned char m_op_index
= 0;
19815 /* The line table index of the current file. */
19816 file_name_index m_file
= 1;
19817 unsigned int m_line
= 1;
19819 /* These are initialized in the constructor. */
19821 CORE_ADDR m_address
;
19823 unsigned int m_discriminator
;
19825 /* Additional bits of state we need to track. */
19827 /* The last file that we called dwarf2_start_subfile for.
19828 This is only used for TLLs. */
19829 unsigned int m_last_file
= 0;
19830 /* The last file a line number was recorded for. */
19831 struct subfile
*m_last_subfile
= NULL
;
19833 /* When true, record the lines we decode. */
19834 bool m_currently_recording_lines
= false;
19836 /* The last line number that was recorded, used to coalesce
19837 consecutive entries for the same line. This can happen, for
19838 example, when discriminators are present. PR 17276. */
19839 unsigned int m_last_line
= 0;
19840 bool m_line_has_non_zero_discriminator
= false;
19844 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19846 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19847 / m_line_header
->maximum_ops_per_instruction
)
19848 * m_line_header
->minimum_instruction_length
);
19849 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19850 m_op_index
= ((m_op_index
+ adjust
)
19851 % m_line_header
->maximum_ops_per_instruction
);
19855 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19857 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19858 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19859 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19860 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19861 / m_line_header
->maximum_ops_per_instruction
)
19862 * m_line_header
->minimum_instruction_length
);
19863 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19864 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19865 % m_line_header
->maximum_ops_per_instruction
);
19867 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19868 advance_line (line_delta
);
19869 record_line (false);
19870 m_discriminator
= 0;
19874 lnp_state_machine::handle_set_file (file_name_index file
)
19878 const file_entry
*fe
= current_file ();
19880 dwarf2_debug_line_missing_file_complaint ();
19881 else if (m_record_lines_p
)
19883 const char *dir
= fe
->include_dir (m_line_header
);
19885 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19886 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19887 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19892 lnp_state_machine::handle_const_add_pc ()
19895 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19898 = (((m_op_index
+ adjust
)
19899 / m_line_header
->maximum_ops_per_instruction
)
19900 * m_line_header
->minimum_instruction_length
);
19902 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19903 m_op_index
= ((m_op_index
+ adjust
)
19904 % m_line_header
->maximum_ops_per_instruction
);
19907 /* Return non-zero if we should add LINE to the line number table.
19908 LINE is the line to add, LAST_LINE is the last line that was added,
19909 LAST_SUBFILE is the subfile for LAST_LINE.
19910 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19911 had a non-zero discriminator.
19913 We have to be careful in the presence of discriminators.
19914 E.g., for this line:
19916 for (i = 0; i < 100000; i++);
19918 clang can emit four line number entries for that one line,
19919 each with a different discriminator.
19920 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19922 However, we want gdb to coalesce all four entries into one.
19923 Otherwise the user could stepi into the middle of the line and
19924 gdb would get confused about whether the pc really was in the
19925 middle of the line.
19927 Things are further complicated by the fact that two consecutive
19928 line number entries for the same line is a heuristic used by gcc
19929 to denote the end of the prologue. So we can't just discard duplicate
19930 entries, we have to be selective about it. The heuristic we use is
19931 that we only collapse consecutive entries for the same line if at least
19932 one of those entries has a non-zero discriminator. PR 17276.
19934 Note: Addresses in the line number state machine can never go backwards
19935 within one sequence, thus this coalescing is ok. */
19938 dwarf_record_line_p (struct dwarf2_cu
*cu
,
19939 unsigned int line
, unsigned int last_line
,
19940 int line_has_non_zero_discriminator
,
19941 struct subfile
*last_subfile
)
19943 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
19945 if (line
!= last_line
)
19947 /* Same line for the same file that we've seen already.
19948 As a last check, for pr 17276, only record the line if the line
19949 has never had a non-zero discriminator. */
19950 if (!line_has_non_zero_discriminator
)
19955 /* Use the CU's builder to record line number LINE beginning at
19956 address ADDRESS in the line table of subfile SUBFILE. */
19959 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19960 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
19961 struct dwarf2_cu
*cu
)
19963 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19965 if (dwarf_line_debug
)
19967 fprintf_unfiltered (gdb_stdlog
,
19968 "Recording line %u, file %s, address %s\n",
19969 line
, lbasename (subfile
->name
),
19970 paddress (gdbarch
, address
));
19974 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
19977 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19978 Mark the end of a set of line number records.
19979 The arguments are the same as for dwarf_record_line_1.
19980 If SUBFILE is NULL the request is ignored. */
19983 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19984 CORE_ADDR address
, struct dwarf2_cu
*cu
)
19986 if (subfile
== NULL
)
19989 if (dwarf_line_debug
)
19991 fprintf_unfiltered (gdb_stdlog
,
19992 "Finishing current line, file %s, address %s\n",
19993 lbasename (subfile
->name
),
19994 paddress (gdbarch
, address
));
19997 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20001 lnp_state_machine::record_line (bool end_sequence
)
20003 if (dwarf_line_debug
)
20005 fprintf_unfiltered (gdb_stdlog
,
20006 "Processing actual line %u: file %u,"
20007 " address %s, is_stmt %u, discrim %u%s\n",
20009 paddress (m_gdbarch
, m_address
),
20010 m_is_stmt
, m_discriminator
,
20011 (end_sequence
? "\t(end sequence)" : ""));
20014 file_entry
*fe
= current_file ();
20017 dwarf2_debug_line_missing_file_complaint ();
20018 /* For now we ignore lines not starting on an instruction boundary.
20019 But not when processing end_sequence for compatibility with the
20020 previous version of the code. */
20021 else if (m_op_index
== 0 || end_sequence
)
20023 fe
->included_p
= 1;
20024 if (m_record_lines_p
)
20026 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20029 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20030 m_currently_recording_lines
? m_cu
: nullptr);
20035 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20037 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20038 m_line_has_non_zero_discriminator
,
20041 buildsym_compunit
*builder
= m_cu
->get_builder ();
20042 dwarf_record_line_1 (m_gdbarch
,
20043 builder
->get_current_subfile (),
20044 m_line
, m_address
, is_stmt
,
20045 m_currently_recording_lines
? m_cu
: nullptr);
20047 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20048 m_last_line
= m_line
;
20054 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20055 line_header
*lh
, bool record_lines_p
)
20059 m_record_lines_p
= record_lines_p
;
20060 m_line_header
= lh
;
20062 m_currently_recording_lines
= true;
20064 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20065 was a line entry for it so that the backend has a chance to adjust it
20066 and also record it in case it needs it. This is currently used by MIPS
20067 code, cf. `mips_adjust_dwarf2_line'. */
20068 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20069 m_is_stmt
= lh
->default_is_stmt
;
20070 m_discriminator
= 0;
20074 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20075 const gdb_byte
*line_ptr
,
20076 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20078 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20079 the pc range of the CU. However, we restrict the test to only ADDRESS
20080 values of zero to preserve GDB's previous behaviour which is to handle
20081 the specific case of a function being GC'd by the linker. */
20083 if (address
== 0 && address
< unrelocated_lowpc
)
20085 /* This line table is for a function which has been
20086 GCd by the linker. Ignore it. PR gdb/12528 */
20088 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20089 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20091 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20092 line_offset
, objfile_name (objfile
));
20093 m_currently_recording_lines
= false;
20094 /* Note: m_currently_recording_lines is left as false until we see
20095 DW_LNE_end_sequence. */
20099 /* Subroutine of dwarf_decode_lines to simplify it.
20100 Process the line number information in LH.
20101 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20102 program in order to set included_p for every referenced header. */
20105 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20106 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20108 const gdb_byte
*line_ptr
, *extended_end
;
20109 const gdb_byte
*line_end
;
20110 unsigned int bytes_read
, extended_len
;
20111 unsigned char op_code
, extended_op
;
20112 CORE_ADDR baseaddr
;
20113 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20114 bfd
*abfd
= objfile
->obfd
;
20115 struct gdbarch
*gdbarch
= objfile
->arch ();
20116 /* True if we're recording line info (as opposed to building partial
20117 symtabs and just interested in finding include files mentioned by
20118 the line number program). */
20119 bool record_lines_p
= !decode_for_pst_p
;
20121 baseaddr
= objfile
->text_section_offset ();
20123 line_ptr
= lh
->statement_program_start
;
20124 line_end
= lh
->statement_program_end
;
20126 /* Read the statement sequences until there's nothing left. */
20127 while (line_ptr
< line_end
)
20129 /* The DWARF line number program state machine. Reset the state
20130 machine at the start of each sequence. */
20131 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20132 bool end_sequence
= false;
20134 if (record_lines_p
)
20136 /* Start a subfile for the current file of the state
20138 const file_entry
*fe
= state_machine
.current_file ();
20141 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20144 /* Decode the table. */
20145 while (line_ptr
< line_end
&& !end_sequence
)
20147 op_code
= read_1_byte (abfd
, line_ptr
);
20150 if (op_code
>= lh
->opcode_base
)
20152 /* Special opcode. */
20153 state_machine
.handle_special_opcode (op_code
);
20155 else switch (op_code
)
20157 case DW_LNS_extended_op
:
20158 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20160 line_ptr
+= bytes_read
;
20161 extended_end
= line_ptr
+ extended_len
;
20162 extended_op
= read_1_byte (abfd
, line_ptr
);
20164 switch (extended_op
)
20166 case DW_LNE_end_sequence
:
20167 state_machine
.handle_end_sequence ();
20168 end_sequence
= true;
20170 case DW_LNE_set_address
:
20173 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20174 line_ptr
+= bytes_read
;
20176 state_machine
.check_line_address (cu
, line_ptr
,
20177 lowpc
- baseaddr
, address
);
20178 state_machine
.handle_set_address (baseaddr
, address
);
20181 case DW_LNE_define_file
:
20183 const char *cur_file
;
20184 unsigned int mod_time
, length
;
20187 cur_file
= read_direct_string (abfd
, line_ptr
,
20189 line_ptr
+= bytes_read
;
20190 dindex
= (dir_index
)
20191 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20192 line_ptr
+= bytes_read
;
20194 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20195 line_ptr
+= bytes_read
;
20197 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20198 line_ptr
+= bytes_read
;
20199 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20202 case DW_LNE_set_discriminator
:
20204 /* The discriminator is not interesting to the
20205 debugger; just ignore it. We still need to
20206 check its value though:
20207 if there are consecutive entries for the same
20208 (non-prologue) line we want to coalesce them.
20211 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20212 line_ptr
+= bytes_read
;
20214 state_machine
.handle_set_discriminator (discr
);
20218 complaint (_("mangled .debug_line section"));
20221 /* Make sure that we parsed the extended op correctly. If e.g.
20222 we expected a different address size than the producer used,
20223 we may have read the wrong number of bytes. */
20224 if (line_ptr
!= extended_end
)
20226 complaint (_("mangled .debug_line section"));
20231 state_machine
.handle_copy ();
20233 case DW_LNS_advance_pc
:
20236 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20237 line_ptr
+= bytes_read
;
20239 state_machine
.handle_advance_pc (adjust
);
20242 case DW_LNS_advance_line
:
20245 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20246 line_ptr
+= bytes_read
;
20248 state_machine
.handle_advance_line (line_delta
);
20251 case DW_LNS_set_file
:
20253 file_name_index file
20254 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20256 line_ptr
+= bytes_read
;
20258 state_machine
.handle_set_file (file
);
20261 case DW_LNS_set_column
:
20262 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20263 line_ptr
+= bytes_read
;
20265 case DW_LNS_negate_stmt
:
20266 state_machine
.handle_negate_stmt ();
20268 case DW_LNS_set_basic_block
:
20270 /* Add to the address register of the state machine the
20271 address increment value corresponding to special opcode
20272 255. I.e., this value is scaled by the minimum
20273 instruction length since special opcode 255 would have
20274 scaled the increment. */
20275 case DW_LNS_const_add_pc
:
20276 state_machine
.handle_const_add_pc ();
20278 case DW_LNS_fixed_advance_pc
:
20280 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20283 state_machine
.handle_fixed_advance_pc (addr_adj
);
20288 /* Unknown standard opcode, ignore it. */
20291 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20293 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20294 line_ptr
+= bytes_read
;
20301 dwarf2_debug_line_missing_end_sequence_complaint ();
20303 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20304 in which case we still finish recording the last line). */
20305 state_machine
.record_line (true);
20309 /* Decode the Line Number Program (LNP) for the given line_header
20310 structure and CU. The actual information extracted and the type
20311 of structures created from the LNP depends on the value of PST.
20313 1. If PST is NULL, then this procedure uses the data from the program
20314 to create all necessary symbol tables, and their linetables.
20316 2. If PST is not NULL, this procedure reads the program to determine
20317 the list of files included by the unit represented by PST, and
20318 builds all the associated partial symbol tables.
20320 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20321 It is used for relative paths in the line table.
20322 NOTE: When processing partial symtabs (pst != NULL),
20323 comp_dir == pst->dirname.
20325 NOTE: It is important that psymtabs have the same file name (via strcmp)
20326 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20327 symtab we don't use it in the name of the psymtabs we create.
20328 E.g. expand_line_sal requires this when finding psymtabs to expand.
20329 A good testcase for this is mb-inline.exp.
20331 LOWPC is the lowest address in CU (or 0 if not known).
20333 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20334 for its PC<->lines mapping information. Otherwise only the filename
20335 table is read in. */
20338 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20339 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20340 CORE_ADDR lowpc
, int decode_mapping
)
20342 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20343 const int decode_for_pst_p
= (pst
!= NULL
);
20345 if (decode_mapping
)
20346 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20348 if (decode_for_pst_p
)
20350 /* Now that we're done scanning the Line Header Program, we can
20351 create the psymtab of each included file. */
20352 for (auto &file_entry
: lh
->file_names ())
20353 if (file_entry
.included_p
== 1)
20355 gdb::unique_xmalloc_ptr
<char> name_holder
;
20356 const char *include_name
=
20357 psymtab_include_file_name (lh
, file_entry
, pst
,
20358 comp_dir
, &name_holder
);
20359 if (include_name
!= NULL
)
20360 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20365 /* Make sure a symtab is created for every file, even files
20366 which contain only variables (i.e. no code with associated
20368 buildsym_compunit
*builder
= cu
->get_builder ();
20369 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20371 for (auto &fe
: lh
->file_names ())
20373 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20374 if (builder
->get_current_subfile ()->symtab
== NULL
)
20376 builder
->get_current_subfile ()->symtab
20377 = allocate_symtab (cust
,
20378 builder
->get_current_subfile ()->name
);
20380 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20385 /* Start a subfile for DWARF. FILENAME is the name of the file and
20386 DIRNAME the name of the source directory which contains FILENAME
20387 or NULL if not known.
20388 This routine tries to keep line numbers from identical absolute and
20389 relative file names in a common subfile.
20391 Using the `list' example from the GDB testsuite, which resides in
20392 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20393 of /srcdir/list0.c yields the following debugging information for list0.c:
20395 DW_AT_name: /srcdir/list0.c
20396 DW_AT_comp_dir: /compdir
20397 files.files[0].name: list0.h
20398 files.files[0].dir: /srcdir
20399 files.files[1].name: list0.c
20400 files.files[1].dir: /srcdir
20402 The line number information for list0.c has to end up in a single
20403 subfile, so that `break /srcdir/list0.c:1' works as expected.
20404 start_subfile will ensure that this happens provided that we pass the
20405 concatenation of files.files[1].dir and files.files[1].name as the
20409 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20410 const char *dirname
)
20412 gdb::unique_xmalloc_ptr
<char> copy
;
20414 /* In order not to lose the line information directory,
20415 we concatenate it to the filename when it makes sense.
20416 Note that the Dwarf3 standard says (speaking of filenames in line
20417 information): ``The directory index is ignored for file names
20418 that represent full path names''. Thus ignoring dirname in the
20419 `else' branch below isn't an issue. */
20421 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20423 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20424 filename
= copy
.get ();
20427 cu
->get_builder ()->start_subfile (filename
);
20430 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20431 buildsym_compunit constructor. */
20433 struct compunit_symtab
*
20434 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20437 gdb_assert (m_builder
== nullptr);
20439 m_builder
.reset (new struct buildsym_compunit
20440 (per_cu
->dwarf2_per_objfile
->objfile
,
20441 name
, comp_dir
, language
, low_pc
));
20443 list_in_scope
= get_builder ()->get_file_symbols ();
20445 get_builder ()->record_debugformat ("DWARF 2");
20446 get_builder ()->record_producer (producer
);
20448 processing_has_namespace_info
= false;
20450 return get_builder ()->get_compunit_symtab ();
20454 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20455 struct dwarf2_cu
*cu
)
20457 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20458 struct comp_unit_head
*cu_header
= &cu
->header
;
20460 /* NOTE drow/2003-01-30: There used to be a comment and some special
20461 code here to turn a symbol with DW_AT_external and a
20462 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20463 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20464 with some versions of binutils) where shared libraries could have
20465 relocations against symbols in their debug information - the
20466 minimal symbol would have the right address, but the debug info
20467 would not. It's no longer necessary, because we will explicitly
20468 apply relocations when we read in the debug information now. */
20470 /* A DW_AT_location attribute with no contents indicates that a
20471 variable has been optimized away. */
20472 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20474 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20478 /* Handle one degenerate form of location expression specially, to
20479 preserve GDB's previous behavior when section offsets are
20480 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20481 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20483 if (attr
->form_is_block ()
20484 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20485 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20486 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20487 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20488 && (DW_BLOCK (attr
)->size
20489 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20491 unsigned int dummy
;
20493 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20494 SET_SYMBOL_VALUE_ADDRESS
20495 (sym
, cu
->header
.read_address (objfile
->obfd
,
20496 DW_BLOCK (attr
)->data
+ 1,
20499 SET_SYMBOL_VALUE_ADDRESS
20500 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20502 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20503 fixup_symbol_section (sym
, objfile
);
20504 SET_SYMBOL_VALUE_ADDRESS
20506 SYMBOL_VALUE_ADDRESS (sym
)
20507 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20511 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20512 expression evaluator, and use LOC_COMPUTED only when necessary
20513 (i.e. when the value of a register or memory location is
20514 referenced, or a thread-local block, etc.). Then again, it might
20515 not be worthwhile. I'm assuming that it isn't unless performance
20516 or memory numbers show me otherwise. */
20518 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20520 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20521 cu
->has_loclist
= true;
20524 /* Given a pointer to a DWARF information entry, figure out if we need
20525 to make a symbol table entry for it, and if so, create a new entry
20526 and return a pointer to it.
20527 If TYPE is NULL, determine symbol type from the die, otherwise
20528 used the passed type.
20529 If SPACE is not NULL, use it to hold the new symbol. If it is
20530 NULL, allocate a new symbol on the objfile's obstack. */
20532 static struct symbol
*
20533 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20534 struct symbol
*space
)
20536 struct dwarf2_per_objfile
*dwarf2_per_objfile
20537 = cu
->per_cu
->dwarf2_per_objfile
;
20538 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20539 struct gdbarch
*gdbarch
= objfile
->arch ();
20540 struct symbol
*sym
= NULL
;
20542 struct attribute
*attr
= NULL
;
20543 struct attribute
*attr2
= NULL
;
20544 CORE_ADDR baseaddr
;
20545 struct pending
**list_to_add
= NULL
;
20547 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20549 baseaddr
= objfile
->text_section_offset ();
20551 name
= dwarf2_name (die
, cu
);
20554 int suppress_add
= 0;
20559 sym
= allocate_symbol (objfile
);
20560 OBJSTAT (objfile
, n_syms
++);
20562 /* Cache this symbol's name and the name's demangled form (if any). */
20563 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20564 /* Fortran does not have mangling standard and the mangling does differ
20565 between gfortran, iFort etc. */
20566 const char *physname
20567 = (cu
->language
== language_fortran
20568 ? dwarf2_full_name (name
, die
, cu
)
20569 : dwarf2_physname (name
, die
, cu
));
20570 const char *linkagename
= dw2_linkage_name (die
, cu
);
20572 if (linkagename
== nullptr || cu
->language
== language_ada
)
20573 sym
->set_linkage_name (physname
);
20576 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20577 sym
->set_linkage_name (linkagename
);
20580 /* Default assumptions.
20581 Use the passed type or decode it from the die. */
20582 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20583 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20585 SYMBOL_TYPE (sym
) = type
;
20587 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20588 attr
= dwarf2_attr (die
,
20589 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20591 if (attr
!= nullptr)
20593 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20596 attr
= dwarf2_attr (die
,
20597 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20599 if (attr
!= nullptr)
20601 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20602 struct file_entry
*fe
;
20604 if (cu
->line_header
!= NULL
)
20605 fe
= cu
->line_header
->file_name_at (file_index
);
20610 complaint (_("file index out of range"));
20612 symbol_set_symtab (sym
, fe
->symtab
);
20618 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20619 if (attr
!= nullptr)
20623 addr
= attr
->value_as_address ();
20624 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20625 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20627 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20628 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20629 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20630 add_symbol_to_list (sym
, cu
->list_in_scope
);
20632 case DW_TAG_subprogram
:
20633 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20635 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20636 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20637 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20638 || cu
->language
== language_ada
20639 || cu
->language
== language_fortran
)
20641 /* Subprograms marked external are stored as a global symbol.
20642 Ada and Fortran subprograms, whether marked external or
20643 not, are always stored as a global symbol, because we want
20644 to be able to access them globally. For instance, we want
20645 to be able to break on a nested subprogram without having
20646 to specify the context. */
20647 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20651 list_to_add
= cu
->list_in_scope
;
20654 case DW_TAG_inlined_subroutine
:
20655 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20657 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20658 SYMBOL_INLINED (sym
) = 1;
20659 list_to_add
= cu
->list_in_scope
;
20661 case DW_TAG_template_value_param
:
20663 /* Fall through. */
20664 case DW_TAG_constant
:
20665 case DW_TAG_variable
:
20666 case DW_TAG_member
:
20667 /* Compilation with minimal debug info may result in
20668 variables with missing type entries. Change the
20669 misleading `void' type to something sensible. */
20670 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20671 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20673 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20674 /* In the case of DW_TAG_member, we should only be called for
20675 static const members. */
20676 if (die
->tag
== DW_TAG_member
)
20678 /* dwarf2_add_field uses die_is_declaration,
20679 so we do the same. */
20680 gdb_assert (die_is_declaration (die
, cu
));
20683 if (attr
!= nullptr)
20685 dwarf2_const_value (attr
, sym
, cu
);
20686 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20689 if (attr2
&& (DW_UNSND (attr2
) != 0))
20690 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20692 list_to_add
= cu
->list_in_scope
;
20696 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20697 if (attr
!= nullptr)
20699 var_decode_location (attr
, sym
, cu
);
20700 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20702 /* Fortran explicitly imports any global symbols to the local
20703 scope by DW_TAG_common_block. */
20704 if (cu
->language
== language_fortran
&& die
->parent
20705 && die
->parent
->tag
== DW_TAG_common_block
)
20708 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20709 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20710 && !dwarf2_per_objfile
->has_section_at_zero
)
20712 /* When a static variable is eliminated by the linker,
20713 the corresponding debug information is not stripped
20714 out, but the variable address is set to null;
20715 do not add such variables into symbol table. */
20717 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20719 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20720 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20721 && dwarf2_per_objfile
->can_copy
)
20723 /* A global static variable might be subject to
20724 copy relocation. We first check for a local
20725 minsym, though, because maybe the symbol was
20726 marked hidden, in which case this would not
20728 bound_minimal_symbol found
20729 = (lookup_minimal_symbol_linkage
20730 (sym
->linkage_name (), objfile
));
20731 if (found
.minsym
!= nullptr)
20732 sym
->maybe_copied
= 1;
20735 /* A variable with DW_AT_external is never static,
20736 but it may be block-scoped. */
20738 = ((cu
->list_in_scope
20739 == cu
->get_builder ()->get_file_symbols ())
20740 ? cu
->get_builder ()->get_global_symbols ()
20741 : cu
->list_in_scope
);
20744 list_to_add
= cu
->list_in_scope
;
20748 /* We do not know the address of this symbol.
20749 If it is an external symbol and we have type information
20750 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20751 The address of the variable will then be determined from
20752 the minimal symbol table whenever the variable is
20754 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20756 /* Fortran explicitly imports any global symbols to the local
20757 scope by DW_TAG_common_block. */
20758 if (cu
->language
== language_fortran
&& die
->parent
20759 && die
->parent
->tag
== DW_TAG_common_block
)
20761 /* SYMBOL_CLASS doesn't matter here because
20762 read_common_block is going to reset it. */
20764 list_to_add
= cu
->list_in_scope
;
20766 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20767 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20769 /* A variable with DW_AT_external is never static, but it
20770 may be block-scoped. */
20772 = ((cu
->list_in_scope
20773 == cu
->get_builder ()->get_file_symbols ())
20774 ? cu
->get_builder ()->get_global_symbols ()
20775 : cu
->list_in_scope
);
20777 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20779 else if (!die_is_declaration (die
, cu
))
20781 /* Use the default LOC_OPTIMIZED_OUT class. */
20782 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20784 list_to_add
= cu
->list_in_scope
;
20788 case DW_TAG_formal_parameter
:
20790 /* If we are inside a function, mark this as an argument. If
20791 not, we might be looking at an argument to an inlined function
20792 when we do not have enough information to show inlined frames;
20793 pretend it's a local variable in that case so that the user can
20795 struct context_stack
*curr
20796 = cu
->get_builder ()->get_current_context_stack ();
20797 if (curr
!= nullptr && curr
->name
!= nullptr)
20798 SYMBOL_IS_ARGUMENT (sym
) = 1;
20799 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20800 if (attr
!= nullptr)
20802 var_decode_location (attr
, sym
, cu
);
20804 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20805 if (attr
!= nullptr)
20807 dwarf2_const_value (attr
, sym
, cu
);
20810 list_to_add
= cu
->list_in_scope
;
20813 case DW_TAG_unspecified_parameters
:
20814 /* From varargs functions; gdb doesn't seem to have any
20815 interest in this information, so just ignore it for now.
20818 case DW_TAG_template_type_param
:
20820 /* Fall through. */
20821 case DW_TAG_class_type
:
20822 case DW_TAG_interface_type
:
20823 case DW_TAG_structure_type
:
20824 case DW_TAG_union_type
:
20825 case DW_TAG_set_type
:
20826 case DW_TAG_enumeration_type
:
20827 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20828 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20831 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20832 really ever be static objects: otherwise, if you try
20833 to, say, break of a class's method and you're in a file
20834 which doesn't mention that class, it won't work unless
20835 the check for all static symbols in lookup_symbol_aux
20836 saves you. See the OtherFileClass tests in
20837 gdb.c++/namespace.exp. */
20841 buildsym_compunit
*builder
= cu
->get_builder ();
20843 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20844 && cu
->language
== language_cplus
20845 ? builder
->get_global_symbols ()
20846 : cu
->list_in_scope
);
20848 /* The semantics of C++ state that "struct foo {
20849 ... }" also defines a typedef for "foo". */
20850 if (cu
->language
== language_cplus
20851 || cu
->language
== language_ada
20852 || cu
->language
== language_d
20853 || cu
->language
== language_rust
)
20855 /* The symbol's name is already allocated along
20856 with this objfile, so we don't need to
20857 duplicate it for the type. */
20858 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20859 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
20864 case DW_TAG_typedef
:
20865 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20866 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20867 list_to_add
= cu
->list_in_scope
;
20869 case DW_TAG_base_type
:
20870 case DW_TAG_subrange_type
:
20871 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20872 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20873 list_to_add
= cu
->list_in_scope
;
20875 case DW_TAG_enumerator
:
20876 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20877 if (attr
!= nullptr)
20879 dwarf2_const_value (attr
, sym
, cu
);
20882 /* NOTE: carlton/2003-11-10: See comment above in the
20883 DW_TAG_class_type, etc. block. */
20886 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20887 && cu
->language
== language_cplus
20888 ? cu
->get_builder ()->get_global_symbols ()
20889 : cu
->list_in_scope
);
20892 case DW_TAG_imported_declaration
:
20893 case DW_TAG_namespace
:
20894 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20895 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20897 case DW_TAG_module
:
20898 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20899 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20900 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20902 case DW_TAG_common_block
:
20903 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20904 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20905 add_symbol_to_list (sym
, cu
->list_in_scope
);
20908 /* Not a tag we recognize. Hopefully we aren't processing
20909 trash data, but since we must specifically ignore things
20910 we don't recognize, there is nothing else we should do at
20912 complaint (_("unsupported tag: '%s'"),
20913 dwarf_tag_name (die
->tag
));
20919 sym
->hash_next
= objfile
->template_symbols
;
20920 objfile
->template_symbols
= sym
;
20921 list_to_add
= NULL
;
20924 if (list_to_add
!= NULL
)
20925 add_symbol_to_list (sym
, list_to_add
);
20927 /* For the benefit of old versions of GCC, check for anonymous
20928 namespaces based on the demangled name. */
20929 if (!cu
->processing_has_namespace_info
20930 && cu
->language
== language_cplus
)
20931 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
20936 /* Given an attr with a DW_FORM_dataN value in host byte order,
20937 zero-extend it as appropriate for the symbol's type. The DWARF
20938 standard (v4) is not entirely clear about the meaning of using
20939 DW_FORM_dataN for a constant with a signed type, where the type is
20940 wider than the data. The conclusion of a discussion on the DWARF
20941 list was that this is unspecified. We choose to always zero-extend
20942 because that is the interpretation long in use by GCC. */
20945 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20946 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20948 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20949 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20950 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20951 LONGEST l
= DW_UNSND (attr
);
20953 if (bits
< sizeof (*value
) * 8)
20955 l
&= ((LONGEST
) 1 << bits
) - 1;
20958 else if (bits
== sizeof (*value
) * 8)
20962 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20963 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20970 /* Read a constant value from an attribute. Either set *VALUE, or if
20971 the value does not fit in *VALUE, set *BYTES - either already
20972 allocated on the objfile obstack, or newly allocated on OBSTACK,
20973 or, set *BATON, if we translated the constant to a location
20977 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20978 const char *name
, struct obstack
*obstack
,
20979 struct dwarf2_cu
*cu
,
20980 LONGEST
*value
, const gdb_byte
**bytes
,
20981 struct dwarf2_locexpr_baton
**baton
)
20983 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20984 struct comp_unit_head
*cu_header
= &cu
->header
;
20985 struct dwarf_block
*blk
;
20986 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20987 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20993 switch (attr
->form
)
20996 case DW_FORM_addrx
:
20997 case DW_FORM_GNU_addr_index
:
21001 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21002 dwarf2_const_value_length_mismatch_complaint (name
,
21003 cu_header
->addr_size
,
21004 TYPE_LENGTH (type
));
21005 /* Symbols of this form are reasonably rare, so we just
21006 piggyback on the existing location code rather than writing
21007 a new implementation of symbol_computed_ops. */
21008 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21009 (*baton
)->per_cu
= cu
->per_cu
;
21010 gdb_assert ((*baton
)->per_cu
);
21012 (*baton
)->size
= 2 + cu_header
->addr_size
;
21013 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21014 (*baton
)->data
= data
;
21016 data
[0] = DW_OP_addr
;
21017 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21018 byte_order
, DW_ADDR (attr
));
21019 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21022 case DW_FORM_string
:
21025 case DW_FORM_GNU_str_index
:
21026 case DW_FORM_GNU_strp_alt
:
21027 /* DW_STRING is already allocated on the objfile obstack, point
21029 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21031 case DW_FORM_block1
:
21032 case DW_FORM_block2
:
21033 case DW_FORM_block4
:
21034 case DW_FORM_block
:
21035 case DW_FORM_exprloc
:
21036 case DW_FORM_data16
:
21037 blk
= DW_BLOCK (attr
);
21038 if (TYPE_LENGTH (type
) != blk
->size
)
21039 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21040 TYPE_LENGTH (type
));
21041 *bytes
= blk
->data
;
21044 /* The DW_AT_const_value attributes are supposed to carry the
21045 symbol's value "represented as it would be on the target
21046 architecture." By the time we get here, it's already been
21047 converted to host endianness, so we just need to sign- or
21048 zero-extend it as appropriate. */
21049 case DW_FORM_data1
:
21050 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21052 case DW_FORM_data2
:
21053 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21055 case DW_FORM_data4
:
21056 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21058 case DW_FORM_data8
:
21059 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21062 case DW_FORM_sdata
:
21063 case DW_FORM_implicit_const
:
21064 *value
= DW_SND (attr
);
21067 case DW_FORM_udata
:
21068 *value
= DW_UNSND (attr
);
21072 complaint (_("unsupported const value attribute form: '%s'"),
21073 dwarf_form_name (attr
->form
));
21080 /* Copy constant value from an attribute to a symbol. */
21083 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21084 struct dwarf2_cu
*cu
)
21086 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21088 const gdb_byte
*bytes
;
21089 struct dwarf2_locexpr_baton
*baton
;
21091 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21092 sym
->print_name (),
21093 &objfile
->objfile_obstack
, cu
,
21094 &value
, &bytes
, &baton
);
21098 SYMBOL_LOCATION_BATON (sym
) = baton
;
21099 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21101 else if (bytes
!= NULL
)
21103 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21104 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21108 SYMBOL_VALUE (sym
) = value
;
21109 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21113 /* Return the type of the die in question using its DW_AT_type attribute. */
21115 static struct type
*
21116 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21118 struct attribute
*type_attr
;
21120 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21123 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21124 /* A missing DW_AT_type represents a void type. */
21125 return objfile_type (objfile
)->builtin_void
;
21128 return lookup_die_type (die
, type_attr
, cu
);
21131 /* True iff CU's producer generates GNAT Ada auxiliary information
21132 that allows to find parallel types through that information instead
21133 of having to do expensive parallel lookups by type name. */
21136 need_gnat_info (struct dwarf2_cu
*cu
)
21138 /* Assume that the Ada compiler was GNAT, which always produces
21139 the auxiliary information. */
21140 return (cu
->language
== language_ada
);
21143 /* Return the auxiliary type of the die in question using its
21144 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21145 attribute is not present. */
21147 static struct type
*
21148 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21150 struct attribute
*type_attr
;
21152 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21156 return lookup_die_type (die
, type_attr
, cu
);
21159 /* If DIE has a descriptive_type attribute, then set the TYPE's
21160 descriptive type accordingly. */
21163 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21164 struct dwarf2_cu
*cu
)
21166 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21168 if (descriptive_type
)
21170 ALLOCATE_GNAT_AUX_TYPE (type
);
21171 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21175 /* Return the containing type of the die in question using its
21176 DW_AT_containing_type attribute. */
21178 static struct type
*
21179 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21181 struct attribute
*type_attr
;
21182 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21184 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21186 error (_("Dwarf Error: Problem turning containing type into gdb type "
21187 "[in module %s]"), objfile_name (objfile
));
21189 return lookup_die_type (die
, type_attr
, cu
);
21192 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21194 static struct type
*
21195 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21197 struct dwarf2_per_objfile
*dwarf2_per_objfile
21198 = cu
->per_cu
->dwarf2_per_objfile
;
21199 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21202 std::string message
21203 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21204 objfile_name (objfile
),
21205 sect_offset_str (cu
->header
.sect_off
),
21206 sect_offset_str (die
->sect_off
));
21207 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21209 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21212 /* Look up the type of DIE in CU using its type attribute ATTR.
21213 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21214 DW_AT_containing_type.
21215 If there is no type substitute an error marker. */
21217 static struct type
*
21218 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21219 struct dwarf2_cu
*cu
)
21221 struct dwarf2_per_objfile
*dwarf2_per_objfile
21222 = cu
->per_cu
->dwarf2_per_objfile
;
21223 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21224 struct type
*this_type
;
21226 gdb_assert (attr
->name
== DW_AT_type
21227 || attr
->name
== DW_AT_GNAT_descriptive_type
21228 || attr
->name
== DW_AT_containing_type
);
21230 /* First see if we have it cached. */
21232 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21234 struct dwarf2_per_cu_data
*per_cu
;
21235 sect_offset sect_off
= attr
->get_ref_die_offset ();
21237 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21238 dwarf2_per_objfile
);
21239 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21241 else if (attr
->form_is_ref ())
21243 sect_offset sect_off
= attr
->get_ref_die_offset ();
21245 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21247 else if (attr
->form
== DW_FORM_ref_sig8
)
21249 ULONGEST signature
= DW_SIGNATURE (attr
);
21251 return get_signatured_type (die
, signature
, cu
);
21255 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21256 " at %s [in module %s]"),
21257 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21258 objfile_name (objfile
));
21259 return build_error_marker_type (cu
, die
);
21262 /* If not cached we need to read it in. */
21264 if (this_type
== NULL
)
21266 struct die_info
*type_die
= NULL
;
21267 struct dwarf2_cu
*type_cu
= cu
;
21269 if (attr
->form_is_ref ())
21270 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21271 if (type_die
== NULL
)
21272 return build_error_marker_type (cu
, die
);
21273 /* If we find the type now, it's probably because the type came
21274 from an inter-CU reference and the type's CU got expanded before
21276 this_type
= read_type_die (type_die
, type_cu
);
21279 /* If we still don't have a type use an error marker. */
21281 if (this_type
== NULL
)
21282 return build_error_marker_type (cu
, die
);
21287 /* Return the type in DIE, CU.
21288 Returns NULL for invalid types.
21290 This first does a lookup in die_type_hash,
21291 and only reads the die in if necessary.
21293 NOTE: This can be called when reading in partial or full symbols. */
21295 static struct type
*
21296 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21298 struct type
*this_type
;
21300 this_type
= get_die_type (die
, cu
);
21304 return read_type_die_1 (die
, cu
);
21307 /* Read the type in DIE, CU.
21308 Returns NULL for invalid types. */
21310 static struct type
*
21311 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21313 struct type
*this_type
= NULL
;
21317 case DW_TAG_class_type
:
21318 case DW_TAG_interface_type
:
21319 case DW_TAG_structure_type
:
21320 case DW_TAG_union_type
:
21321 this_type
= read_structure_type (die
, cu
);
21323 case DW_TAG_enumeration_type
:
21324 this_type
= read_enumeration_type (die
, cu
);
21326 case DW_TAG_subprogram
:
21327 case DW_TAG_subroutine_type
:
21328 case DW_TAG_inlined_subroutine
:
21329 this_type
= read_subroutine_type (die
, cu
);
21331 case DW_TAG_array_type
:
21332 this_type
= read_array_type (die
, cu
);
21334 case DW_TAG_set_type
:
21335 this_type
= read_set_type (die
, cu
);
21337 case DW_TAG_pointer_type
:
21338 this_type
= read_tag_pointer_type (die
, cu
);
21340 case DW_TAG_ptr_to_member_type
:
21341 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21343 case DW_TAG_reference_type
:
21344 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21346 case DW_TAG_rvalue_reference_type
:
21347 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21349 case DW_TAG_const_type
:
21350 this_type
= read_tag_const_type (die
, cu
);
21352 case DW_TAG_volatile_type
:
21353 this_type
= read_tag_volatile_type (die
, cu
);
21355 case DW_TAG_restrict_type
:
21356 this_type
= read_tag_restrict_type (die
, cu
);
21358 case DW_TAG_string_type
:
21359 this_type
= read_tag_string_type (die
, cu
);
21361 case DW_TAG_typedef
:
21362 this_type
= read_typedef (die
, cu
);
21364 case DW_TAG_subrange_type
:
21365 this_type
= read_subrange_type (die
, cu
);
21367 case DW_TAG_base_type
:
21368 this_type
= read_base_type (die
, cu
);
21370 case DW_TAG_unspecified_type
:
21371 this_type
= read_unspecified_type (die
, cu
);
21373 case DW_TAG_namespace
:
21374 this_type
= read_namespace_type (die
, cu
);
21376 case DW_TAG_module
:
21377 this_type
= read_module_type (die
, cu
);
21379 case DW_TAG_atomic_type
:
21380 this_type
= read_tag_atomic_type (die
, cu
);
21383 complaint (_("unexpected tag in read_type_die: '%s'"),
21384 dwarf_tag_name (die
->tag
));
21391 /* See if we can figure out if the class lives in a namespace. We do
21392 this by looking for a member function; its demangled name will
21393 contain namespace info, if there is any.
21394 Return the computed name or NULL.
21395 Space for the result is allocated on the objfile's obstack.
21396 This is the full-die version of guess_partial_die_structure_name.
21397 In this case we know DIE has no useful parent. */
21399 static const char *
21400 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21402 struct die_info
*spec_die
;
21403 struct dwarf2_cu
*spec_cu
;
21404 struct die_info
*child
;
21405 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21408 spec_die
= die_specification (die
, &spec_cu
);
21409 if (spec_die
!= NULL
)
21415 for (child
= die
->child
;
21417 child
= child
->sibling
)
21419 if (child
->tag
== DW_TAG_subprogram
)
21421 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21423 if (linkage_name
!= NULL
)
21425 gdb::unique_xmalloc_ptr
<char> actual_name
21426 (language_class_name_from_physname (cu
->language_defn
,
21428 const char *name
= NULL
;
21430 if (actual_name
!= NULL
)
21432 const char *die_name
= dwarf2_name (die
, cu
);
21434 if (die_name
!= NULL
21435 && strcmp (die_name
, actual_name
.get ()) != 0)
21437 /* Strip off the class name from the full name.
21438 We want the prefix. */
21439 int die_name_len
= strlen (die_name
);
21440 int actual_name_len
= strlen (actual_name
.get ());
21441 const char *ptr
= actual_name
.get ();
21443 /* Test for '::' as a sanity check. */
21444 if (actual_name_len
> die_name_len
+ 2
21445 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21446 name
= obstack_strndup (
21447 &objfile
->per_bfd
->storage_obstack
,
21448 ptr
, actual_name_len
- die_name_len
- 2);
21459 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21460 prefix part in such case. See
21461 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21463 static const char *
21464 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21466 struct attribute
*attr
;
21469 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21470 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21473 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21476 attr
= dw2_linkage_name_attr (die
, cu
);
21477 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21480 /* dwarf2_name had to be already called. */
21481 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21483 /* Strip the base name, keep any leading namespaces/classes. */
21484 base
= strrchr (DW_STRING (attr
), ':');
21485 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21488 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21489 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21491 &base
[-1] - DW_STRING (attr
));
21494 /* Return the name of the namespace/class that DIE is defined within,
21495 or "" if we can't tell. The caller should not xfree the result.
21497 For example, if we're within the method foo() in the following
21507 then determine_prefix on foo's die will return "N::C". */
21509 static const char *
21510 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21512 struct dwarf2_per_objfile
*dwarf2_per_objfile
21513 = cu
->per_cu
->dwarf2_per_objfile
;
21514 struct die_info
*parent
, *spec_die
;
21515 struct dwarf2_cu
*spec_cu
;
21516 struct type
*parent_type
;
21517 const char *retval
;
21519 if (cu
->language
!= language_cplus
21520 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21521 && cu
->language
!= language_rust
)
21524 retval
= anonymous_struct_prefix (die
, cu
);
21528 /* We have to be careful in the presence of DW_AT_specification.
21529 For example, with GCC 3.4, given the code
21533 // Definition of N::foo.
21537 then we'll have a tree of DIEs like this:
21539 1: DW_TAG_compile_unit
21540 2: DW_TAG_namespace // N
21541 3: DW_TAG_subprogram // declaration of N::foo
21542 4: DW_TAG_subprogram // definition of N::foo
21543 DW_AT_specification // refers to die #3
21545 Thus, when processing die #4, we have to pretend that we're in
21546 the context of its DW_AT_specification, namely the contex of die
21549 spec_die
= die_specification (die
, &spec_cu
);
21550 if (spec_die
== NULL
)
21551 parent
= die
->parent
;
21554 parent
= spec_die
->parent
;
21558 if (parent
== NULL
)
21560 else if (parent
->building_fullname
)
21563 const char *parent_name
;
21565 /* It has been seen on RealView 2.2 built binaries,
21566 DW_TAG_template_type_param types actually _defined_ as
21567 children of the parent class:
21570 template class <class Enum> Class{};
21571 Class<enum E> class_e;
21573 1: DW_TAG_class_type (Class)
21574 2: DW_TAG_enumeration_type (E)
21575 3: DW_TAG_enumerator (enum1:0)
21576 3: DW_TAG_enumerator (enum2:1)
21578 2: DW_TAG_template_type_param
21579 DW_AT_type DW_FORM_ref_udata (E)
21581 Besides being broken debug info, it can put GDB into an
21582 infinite loop. Consider:
21584 When we're building the full name for Class<E>, we'll start
21585 at Class, and go look over its template type parameters,
21586 finding E. We'll then try to build the full name of E, and
21587 reach here. We're now trying to build the full name of E,
21588 and look over the parent DIE for containing scope. In the
21589 broken case, if we followed the parent DIE of E, we'd again
21590 find Class, and once again go look at its template type
21591 arguments, etc., etc. Simply don't consider such parent die
21592 as source-level parent of this die (it can't be, the language
21593 doesn't allow it), and break the loop here. */
21594 name
= dwarf2_name (die
, cu
);
21595 parent_name
= dwarf2_name (parent
, cu
);
21596 complaint (_("template param type '%s' defined within parent '%s'"),
21597 name
? name
: "<unknown>",
21598 parent_name
? parent_name
: "<unknown>");
21602 switch (parent
->tag
)
21604 case DW_TAG_namespace
:
21605 parent_type
= read_type_die (parent
, cu
);
21606 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21607 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21608 Work around this problem here. */
21609 if (cu
->language
== language_cplus
21610 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
21612 /* We give a name to even anonymous namespaces. */
21613 return TYPE_NAME (parent_type
);
21614 case DW_TAG_class_type
:
21615 case DW_TAG_interface_type
:
21616 case DW_TAG_structure_type
:
21617 case DW_TAG_union_type
:
21618 case DW_TAG_module
:
21619 parent_type
= read_type_die (parent
, cu
);
21620 if (TYPE_NAME (parent_type
) != NULL
)
21621 return TYPE_NAME (parent_type
);
21623 /* An anonymous structure is only allowed non-static data
21624 members; no typedefs, no member functions, et cetera.
21625 So it does not need a prefix. */
21627 case DW_TAG_compile_unit
:
21628 case DW_TAG_partial_unit
:
21629 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21630 if (cu
->language
== language_cplus
21631 && !dwarf2_per_objfile
->types
.empty ()
21632 && die
->child
!= NULL
21633 && (die
->tag
== DW_TAG_class_type
21634 || die
->tag
== DW_TAG_structure_type
21635 || die
->tag
== DW_TAG_union_type
))
21637 const char *name
= guess_full_die_structure_name (die
, cu
);
21642 case DW_TAG_subprogram
:
21643 /* Nested subroutines in Fortran get a prefix with the name
21644 of the parent's subroutine. */
21645 if (cu
->language
== language_fortran
)
21647 if ((die
->tag
== DW_TAG_subprogram
)
21648 && (dwarf2_name (parent
, cu
) != NULL
))
21649 return dwarf2_name (parent
, cu
);
21651 return determine_prefix (parent
, cu
);
21652 case DW_TAG_enumeration_type
:
21653 parent_type
= read_type_die (parent
, cu
);
21654 if (TYPE_DECLARED_CLASS (parent_type
))
21656 if (TYPE_NAME (parent_type
) != NULL
)
21657 return TYPE_NAME (parent_type
);
21660 /* Fall through. */
21662 return determine_prefix (parent
, cu
);
21666 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21667 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21668 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21669 an obconcat, otherwise allocate storage for the result. The CU argument is
21670 used to determine the language and hence, the appropriate separator. */
21672 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21675 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21676 int physname
, struct dwarf2_cu
*cu
)
21678 const char *lead
= "";
21681 if (suffix
== NULL
|| suffix
[0] == '\0'
21682 || prefix
== NULL
|| prefix
[0] == '\0')
21684 else if (cu
->language
== language_d
)
21686 /* For D, the 'main' function could be defined in any module, but it
21687 should never be prefixed. */
21688 if (strcmp (suffix
, "D main") == 0)
21696 else if (cu
->language
== language_fortran
&& physname
)
21698 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21699 DW_AT_MIPS_linkage_name is preferred and used instead. */
21707 if (prefix
== NULL
)
21709 if (suffix
== NULL
)
21716 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21718 strcpy (retval
, lead
);
21719 strcat (retval
, prefix
);
21720 strcat (retval
, sep
);
21721 strcat (retval
, suffix
);
21726 /* We have an obstack. */
21727 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21731 /* Get name of a die, return NULL if not found. */
21733 static const char *
21734 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21735 struct objfile
*objfile
)
21737 if (name
&& cu
->language
== language_cplus
)
21739 gdb::unique_xmalloc_ptr
<char> canon_name
21740 = cp_canonicalize_string (name
);
21742 if (canon_name
!= nullptr)
21743 name
= objfile
->intern (canon_name
.get ());
21749 /* Get name of a die, return NULL if not found.
21750 Anonymous namespaces are converted to their magic string. */
21752 static const char *
21753 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21755 struct attribute
*attr
;
21756 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21758 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21759 if ((!attr
|| !DW_STRING (attr
))
21760 && die
->tag
!= DW_TAG_namespace
21761 && die
->tag
!= DW_TAG_class_type
21762 && die
->tag
!= DW_TAG_interface_type
21763 && die
->tag
!= DW_TAG_structure_type
21764 && die
->tag
!= DW_TAG_union_type
)
21769 case DW_TAG_compile_unit
:
21770 case DW_TAG_partial_unit
:
21771 /* Compilation units have a DW_AT_name that is a filename, not
21772 a source language identifier. */
21773 case DW_TAG_enumeration_type
:
21774 case DW_TAG_enumerator
:
21775 /* These tags always have simple identifiers already; no need
21776 to canonicalize them. */
21777 return DW_STRING (attr
);
21779 case DW_TAG_namespace
:
21780 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21781 return DW_STRING (attr
);
21782 return CP_ANONYMOUS_NAMESPACE_STR
;
21784 case DW_TAG_class_type
:
21785 case DW_TAG_interface_type
:
21786 case DW_TAG_structure_type
:
21787 case DW_TAG_union_type
:
21788 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21789 structures or unions. These were of the form "._%d" in GCC 4.1,
21790 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21791 and GCC 4.4. We work around this problem by ignoring these. */
21792 if (attr
&& DW_STRING (attr
)
21793 && (startswith (DW_STRING (attr
), "._")
21794 || startswith (DW_STRING (attr
), "<anonymous")))
21797 /* GCC might emit a nameless typedef that has a linkage name. See
21798 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21799 if (!attr
|| DW_STRING (attr
) == NULL
)
21801 attr
= dw2_linkage_name_attr (die
, cu
);
21802 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21805 /* Avoid demangling DW_STRING (attr) the second time on a second
21806 call for the same DIE. */
21807 if (!DW_STRING_IS_CANONICAL (attr
))
21809 gdb::unique_xmalloc_ptr
<char> demangled
21810 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21811 if (demangled
== nullptr)
21814 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21815 DW_STRING_IS_CANONICAL (attr
) = 1;
21818 /* Strip any leading namespaces/classes, keep only the base name.
21819 DW_AT_name for named DIEs does not contain the prefixes. */
21820 const char *base
= strrchr (DW_STRING (attr
), ':');
21821 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21824 return DW_STRING (attr
);
21832 if (!DW_STRING_IS_CANONICAL (attr
))
21834 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21836 DW_STRING_IS_CANONICAL (attr
) = 1;
21838 return DW_STRING (attr
);
21841 /* Return the die that this die in an extension of, or NULL if there
21842 is none. *EXT_CU is the CU containing DIE on input, and the CU
21843 containing the return value on output. */
21845 static struct die_info
*
21846 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21848 struct attribute
*attr
;
21850 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21854 return follow_die_ref (die
, attr
, ext_cu
);
21858 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21862 print_spaces (indent
, f
);
21863 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21864 dwarf_tag_name (die
->tag
), die
->abbrev
,
21865 sect_offset_str (die
->sect_off
));
21867 if (die
->parent
!= NULL
)
21869 print_spaces (indent
, f
);
21870 fprintf_unfiltered (f
, " parent at offset: %s\n",
21871 sect_offset_str (die
->parent
->sect_off
));
21874 print_spaces (indent
, f
);
21875 fprintf_unfiltered (f
, " has children: %s\n",
21876 dwarf_bool_name (die
->child
!= NULL
));
21878 print_spaces (indent
, f
);
21879 fprintf_unfiltered (f
, " attributes:\n");
21881 for (i
= 0; i
< die
->num_attrs
; ++i
)
21883 print_spaces (indent
, f
);
21884 fprintf_unfiltered (f
, " %s (%s) ",
21885 dwarf_attr_name (die
->attrs
[i
].name
),
21886 dwarf_form_name (die
->attrs
[i
].form
));
21888 switch (die
->attrs
[i
].form
)
21891 case DW_FORM_addrx
:
21892 case DW_FORM_GNU_addr_index
:
21893 fprintf_unfiltered (f
, "address: ");
21894 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21896 case DW_FORM_block2
:
21897 case DW_FORM_block4
:
21898 case DW_FORM_block
:
21899 case DW_FORM_block1
:
21900 fprintf_unfiltered (f
, "block: size %s",
21901 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21903 case DW_FORM_exprloc
:
21904 fprintf_unfiltered (f
, "expression: size %s",
21905 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21907 case DW_FORM_data16
:
21908 fprintf_unfiltered (f
, "constant of 16 bytes");
21910 case DW_FORM_ref_addr
:
21911 fprintf_unfiltered (f
, "ref address: ");
21912 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21914 case DW_FORM_GNU_ref_alt
:
21915 fprintf_unfiltered (f
, "alt ref address: ");
21916 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21922 case DW_FORM_ref_udata
:
21923 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21924 (long) (DW_UNSND (&die
->attrs
[i
])));
21926 case DW_FORM_data1
:
21927 case DW_FORM_data2
:
21928 case DW_FORM_data4
:
21929 case DW_FORM_data8
:
21930 case DW_FORM_udata
:
21931 case DW_FORM_sdata
:
21932 fprintf_unfiltered (f
, "constant: %s",
21933 pulongest (DW_UNSND (&die
->attrs
[i
])));
21935 case DW_FORM_sec_offset
:
21936 fprintf_unfiltered (f
, "section offset: %s",
21937 pulongest (DW_UNSND (&die
->attrs
[i
])));
21939 case DW_FORM_ref_sig8
:
21940 fprintf_unfiltered (f
, "signature: %s",
21941 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21943 case DW_FORM_string
:
21945 case DW_FORM_line_strp
:
21947 case DW_FORM_GNU_str_index
:
21948 case DW_FORM_GNU_strp_alt
:
21949 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21950 DW_STRING (&die
->attrs
[i
])
21951 ? DW_STRING (&die
->attrs
[i
]) : "",
21952 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21955 if (DW_UNSND (&die
->attrs
[i
]))
21956 fprintf_unfiltered (f
, "flag: TRUE");
21958 fprintf_unfiltered (f
, "flag: FALSE");
21960 case DW_FORM_flag_present
:
21961 fprintf_unfiltered (f
, "flag: TRUE");
21963 case DW_FORM_indirect
:
21964 /* The reader will have reduced the indirect form to
21965 the "base form" so this form should not occur. */
21966 fprintf_unfiltered (f
,
21967 "unexpected attribute form: DW_FORM_indirect");
21969 case DW_FORM_implicit_const
:
21970 fprintf_unfiltered (f
, "constant: %s",
21971 plongest (DW_SND (&die
->attrs
[i
])));
21974 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21975 die
->attrs
[i
].form
);
21978 fprintf_unfiltered (f
, "\n");
21983 dump_die_for_error (struct die_info
*die
)
21985 dump_die_shallow (gdb_stderr
, 0, die
);
21989 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21991 int indent
= level
* 4;
21993 gdb_assert (die
!= NULL
);
21995 if (level
>= max_level
)
21998 dump_die_shallow (f
, indent
, die
);
22000 if (die
->child
!= NULL
)
22002 print_spaces (indent
, f
);
22003 fprintf_unfiltered (f
, " Children:");
22004 if (level
+ 1 < max_level
)
22006 fprintf_unfiltered (f
, "\n");
22007 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22011 fprintf_unfiltered (f
,
22012 " [not printed, max nesting level reached]\n");
22016 if (die
->sibling
!= NULL
&& level
> 0)
22018 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22022 /* This is called from the pdie macro in gdbinit.in.
22023 It's not static so gcc will keep a copy callable from gdb. */
22026 dump_die (struct die_info
*die
, int max_level
)
22028 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22032 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22036 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22037 to_underlying (die
->sect_off
),
22043 /* Follow reference or signature attribute ATTR of SRC_DIE.
22044 On entry *REF_CU is the CU of SRC_DIE.
22045 On exit *REF_CU is the CU of the result. */
22047 static struct die_info
*
22048 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22049 struct dwarf2_cu
**ref_cu
)
22051 struct die_info
*die
;
22053 if (attr
->form_is_ref ())
22054 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22055 else if (attr
->form
== DW_FORM_ref_sig8
)
22056 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22059 dump_die_for_error (src_die
);
22060 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22061 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22067 /* Follow reference OFFSET.
22068 On entry *REF_CU is the CU of the source die referencing OFFSET.
22069 On exit *REF_CU is the CU of the result.
22070 Returns NULL if OFFSET is invalid. */
22072 static struct die_info
*
22073 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22074 struct dwarf2_cu
**ref_cu
)
22076 struct die_info temp_die
;
22077 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22078 struct dwarf2_per_objfile
*dwarf2_per_objfile
22079 = cu
->per_cu
->dwarf2_per_objfile
;
22081 gdb_assert (cu
->per_cu
!= NULL
);
22085 if (cu
->per_cu
->is_debug_types
)
22087 /* .debug_types CUs cannot reference anything outside their CU.
22088 If they need to, they have to reference a signatured type via
22089 DW_FORM_ref_sig8. */
22090 if (!cu
->header
.offset_in_cu_p (sect_off
))
22093 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22094 || !cu
->header
.offset_in_cu_p (sect_off
))
22096 struct dwarf2_per_cu_data
*per_cu
;
22098 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22099 dwarf2_per_objfile
);
22101 /* If necessary, add it to the queue and load its DIEs. */
22102 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22103 load_full_comp_unit (per_cu
, false, cu
->language
);
22105 target_cu
= per_cu
->cu
;
22107 else if (cu
->dies
== NULL
)
22109 /* We're loading full DIEs during partial symbol reading. */
22110 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22111 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22114 *ref_cu
= target_cu
;
22115 temp_die
.sect_off
= sect_off
;
22117 if (target_cu
!= cu
)
22118 target_cu
->ancestor
= cu
;
22120 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22122 to_underlying (sect_off
));
22125 /* Follow reference attribute ATTR of SRC_DIE.
22126 On entry *REF_CU is the CU of SRC_DIE.
22127 On exit *REF_CU is the CU of the result. */
22129 static struct die_info
*
22130 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22131 struct dwarf2_cu
**ref_cu
)
22133 sect_offset sect_off
= attr
->get_ref_die_offset ();
22134 struct dwarf2_cu
*cu
= *ref_cu
;
22135 struct die_info
*die
;
22137 die
= follow_die_offset (sect_off
,
22138 (attr
->form
== DW_FORM_GNU_ref_alt
22139 || cu
->per_cu
->is_dwz
),
22142 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22143 "at %s [in module %s]"),
22144 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22145 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22152 struct dwarf2_locexpr_baton
22153 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22154 dwarf2_per_cu_data
*per_cu
,
22155 CORE_ADDR (*get_frame_pc
) (void *baton
),
22156 void *baton
, bool resolve_abstract_p
)
22158 struct dwarf2_cu
*cu
;
22159 struct die_info
*die
;
22160 struct attribute
*attr
;
22161 struct dwarf2_locexpr_baton retval
;
22162 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22163 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22165 if (per_cu
->cu
== NULL
)
22166 load_cu (per_cu
, false);
22170 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22171 Instead just throw an error, not much else we can do. */
22172 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22173 sect_offset_str (sect_off
), objfile_name (objfile
));
22176 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22178 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22179 sect_offset_str (sect_off
), objfile_name (objfile
));
22181 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22182 if (!attr
&& resolve_abstract_p
22183 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22184 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22186 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22187 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22188 struct gdbarch
*gdbarch
= objfile
->arch ();
22190 for (const auto &cand_off
22191 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22193 struct dwarf2_cu
*cand_cu
= cu
;
22194 struct die_info
*cand
22195 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22198 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22201 CORE_ADDR pc_low
, pc_high
;
22202 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22203 if (pc_low
== ((CORE_ADDR
) -1))
22205 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22206 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22207 if (!(pc_low
<= pc
&& pc
< pc_high
))
22211 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22218 /* DWARF: "If there is no such attribute, then there is no effect.".
22219 DATA is ignored if SIZE is 0. */
22221 retval
.data
= NULL
;
22224 else if (attr
->form_is_section_offset ())
22226 struct dwarf2_loclist_baton loclist_baton
;
22227 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22230 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22232 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22234 retval
.size
= size
;
22238 if (!attr
->form_is_block ())
22239 error (_("Dwarf Error: DIE at %s referenced in module %s "
22240 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22241 sect_offset_str (sect_off
), objfile_name (objfile
));
22243 retval
.data
= DW_BLOCK (attr
)->data
;
22244 retval
.size
= DW_BLOCK (attr
)->size
;
22246 retval
.per_cu
= cu
->per_cu
;
22248 age_cached_comp_units (dwarf2_per_objfile
);
22255 struct dwarf2_locexpr_baton
22256 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22257 dwarf2_per_cu_data
*per_cu
,
22258 CORE_ADDR (*get_frame_pc
) (void *baton
),
22261 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22263 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22266 /* Write a constant of a given type as target-ordered bytes into
22269 static const gdb_byte
*
22270 write_constant_as_bytes (struct obstack
*obstack
,
22271 enum bfd_endian byte_order
,
22278 *len
= TYPE_LENGTH (type
);
22279 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22280 store_unsigned_integer (result
, *len
, byte_order
, value
);
22288 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22289 dwarf2_per_cu_data
*per_cu
,
22293 struct dwarf2_cu
*cu
;
22294 struct die_info
*die
;
22295 struct attribute
*attr
;
22296 const gdb_byte
*result
= NULL
;
22299 enum bfd_endian byte_order
;
22300 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22302 if (per_cu
->cu
== NULL
)
22303 load_cu (per_cu
, false);
22307 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22308 Instead just throw an error, not much else we can do. */
22309 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22310 sect_offset_str (sect_off
), objfile_name (objfile
));
22313 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22315 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22316 sect_offset_str (sect_off
), objfile_name (objfile
));
22318 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22322 byte_order
= (bfd_big_endian (objfile
->obfd
)
22323 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22325 switch (attr
->form
)
22328 case DW_FORM_addrx
:
22329 case DW_FORM_GNU_addr_index
:
22333 *len
= cu
->header
.addr_size
;
22334 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22335 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22339 case DW_FORM_string
:
22342 case DW_FORM_GNU_str_index
:
22343 case DW_FORM_GNU_strp_alt
:
22344 /* DW_STRING is already allocated on the objfile obstack, point
22346 result
= (const gdb_byte
*) DW_STRING (attr
);
22347 *len
= strlen (DW_STRING (attr
));
22349 case DW_FORM_block1
:
22350 case DW_FORM_block2
:
22351 case DW_FORM_block4
:
22352 case DW_FORM_block
:
22353 case DW_FORM_exprloc
:
22354 case DW_FORM_data16
:
22355 result
= DW_BLOCK (attr
)->data
;
22356 *len
= DW_BLOCK (attr
)->size
;
22359 /* The DW_AT_const_value attributes are supposed to carry the
22360 symbol's value "represented as it would be on the target
22361 architecture." By the time we get here, it's already been
22362 converted to host endianness, so we just need to sign- or
22363 zero-extend it as appropriate. */
22364 case DW_FORM_data1
:
22365 type
= die_type (die
, cu
);
22366 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22367 if (result
== NULL
)
22368 result
= write_constant_as_bytes (obstack
, byte_order
,
22371 case DW_FORM_data2
:
22372 type
= die_type (die
, cu
);
22373 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22374 if (result
== NULL
)
22375 result
= write_constant_as_bytes (obstack
, byte_order
,
22378 case DW_FORM_data4
:
22379 type
= die_type (die
, cu
);
22380 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22381 if (result
== NULL
)
22382 result
= write_constant_as_bytes (obstack
, byte_order
,
22385 case DW_FORM_data8
:
22386 type
= die_type (die
, cu
);
22387 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22388 if (result
== NULL
)
22389 result
= write_constant_as_bytes (obstack
, byte_order
,
22393 case DW_FORM_sdata
:
22394 case DW_FORM_implicit_const
:
22395 type
= die_type (die
, cu
);
22396 result
= write_constant_as_bytes (obstack
, byte_order
,
22397 type
, DW_SND (attr
), len
);
22400 case DW_FORM_udata
:
22401 type
= die_type (die
, cu
);
22402 result
= write_constant_as_bytes (obstack
, byte_order
,
22403 type
, DW_UNSND (attr
), len
);
22407 complaint (_("unsupported const value attribute form: '%s'"),
22408 dwarf_form_name (attr
->form
));
22418 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22419 dwarf2_per_cu_data
*per_cu
)
22421 struct dwarf2_cu
*cu
;
22422 struct die_info
*die
;
22424 if (per_cu
->cu
== NULL
)
22425 load_cu (per_cu
, false);
22430 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22434 return die_type (die
, cu
);
22440 dwarf2_get_die_type (cu_offset die_offset
,
22441 struct dwarf2_per_cu_data
*per_cu
)
22443 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22444 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22447 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22448 On entry *REF_CU is the CU of SRC_DIE.
22449 On exit *REF_CU is the CU of the result.
22450 Returns NULL if the referenced DIE isn't found. */
22452 static struct die_info
*
22453 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22454 struct dwarf2_cu
**ref_cu
)
22456 struct die_info temp_die
;
22457 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22458 struct die_info
*die
;
22460 /* While it might be nice to assert sig_type->type == NULL here,
22461 we can get here for DW_AT_imported_declaration where we need
22462 the DIE not the type. */
22464 /* If necessary, add it to the queue and load its DIEs. */
22466 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22467 read_signatured_type (sig_type
);
22469 sig_cu
= sig_type
->per_cu
.cu
;
22470 gdb_assert (sig_cu
!= NULL
);
22471 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22472 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22473 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22474 to_underlying (temp_die
.sect_off
));
22477 struct dwarf2_per_objfile
*dwarf2_per_objfile
22478 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22480 /* For .gdb_index version 7 keep track of included TUs.
22481 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22482 if (dwarf2_per_objfile
->index_table
!= NULL
22483 && dwarf2_per_objfile
->index_table
->version
<= 7)
22485 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22490 sig_cu
->ancestor
= cu
;
22498 /* Follow signatured type referenced by ATTR in SRC_DIE.
22499 On entry *REF_CU is the CU of SRC_DIE.
22500 On exit *REF_CU is the CU of the result.
22501 The result is the DIE of the type.
22502 If the referenced type cannot be found an error is thrown. */
22504 static struct die_info
*
22505 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22506 struct dwarf2_cu
**ref_cu
)
22508 ULONGEST signature
= DW_SIGNATURE (attr
);
22509 struct signatured_type
*sig_type
;
22510 struct die_info
*die
;
22512 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22514 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22515 /* sig_type will be NULL if the signatured type is missing from
22517 if (sig_type
== NULL
)
22519 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22520 " from DIE at %s [in module %s]"),
22521 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22522 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22525 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22528 dump_die_for_error (src_die
);
22529 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22530 " from DIE at %s [in module %s]"),
22531 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22532 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22538 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22539 reading in and processing the type unit if necessary. */
22541 static struct type
*
22542 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22543 struct dwarf2_cu
*cu
)
22545 struct dwarf2_per_objfile
*dwarf2_per_objfile
22546 = cu
->per_cu
->dwarf2_per_objfile
;
22547 struct signatured_type
*sig_type
;
22548 struct dwarf2_cu
*type_cu
;
22549 struct die_info
*type_die
;
22552 sig_type
= lookup_signatured_type (cu
, signature
);
22553 /* sig_type will be NULL if the signatured type is missing from
22555 if (sig_type
== NULL
)
22557 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22558 " from DIE at %s [in module %s]"),
22559 hex_string (signature
), sect_offset_str (die
->sect_off
),
22560 objfile_name (dwarf2_per_objfile
->objfile
));
22561 return build_error_marker_type (cu
, die
);
22564 /* If we already know the type we're done. */
22565 if (sig_type
->type
!= NULL
)
22566 return sig_type
->type
;
22569 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22570 if (type_die
!= NULL
)
22572 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22573 is created. This is important, for example, because for c++ classes
22574 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22575 type
= read_type_die (type_die
, type_cu
);
22578 complaint (_("Dwarf Error: Cannot build signatured type %s"
22579 " referenced from DIE at %s [in module %s]"),
22580 hex_string (signature
), sect_offset_str (die
->sect_off
),
22581 objfile_name (dwarf2_per_objfile
->objfile
));
22582 type
= build_error_marker_type (cu
, die
);
22587 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22588 " from DIE at %s [in module %s]"),
22589 hex_string (signature
), sect_offset_str (die
->sect_off
),
22590 objfile_name (dwarf2_per_objfile
->objfile
));
22591 type
= build_error_marker_type (cu
, die
);
22593 sig_type
->type
= type
;
22598 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22599 reading in and processing the type unit if necessary. */
22601 static struct type
*
22602 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22603 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22605 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22606 if (attr
->form_is_ref ())
22608 struct dwarf2_cu
*type_cu
= cu
;
22609 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22611 return read_type_die (type_die
, type_cu
);
22613 else if (attr
->form
== DW_FORM_ref_sig8
)
22615 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22619 struct dwarf2_per_objfile
*dwarf2_per_objfile
22620 = cu
->per_cu
->dwarf2_per_objfile
;
22622 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22623 " at %s [in module %s]"),
22624 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22625 objfile_name (dwarf2_per_objfile
->objfile
));
22626 return build_error_marker_type (cu
, die
);
22630 /* Load the DIEs associated with type unit PER_CU into memory. */
22633 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22635 struct signatured_type
*sig_type
;
22637 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22638 gdb_assert (! per_cu
->type_unit_group_p ());
22640 /* We have the per_cu, but we need the signatured_type.
22641 Fortunately this is an easy translation. */
22642 gdb_assert (per_cu
->is_debug_types
);
22643 sig_type
= (struct signatured_type
*) per_cu
;
22645 gdb_assert (per_cu
->cu
== NULL
);
22647 read_signatured_type (sig_type
);
22649 gdb_assert (per_cu
->cu
!= NULL
);
22652 /* Read in a signatured type and build its CU and DIEs.
22653 If the type is a stub for the real type in a DWO file,
22654 read in the real type from the DWO file as well. */
22657 read_signatured_type (struct signatured_type
*sig_type
)
22659 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22661 gdb_assert (per_cu
->is_debug_types
);
22662 gdb_assert (per_cu
->cu
== NULL
);
22664 cutu_reader
reader (per_cu
, NULL
, 0, false);
22666 if (!reader
.dummy_p
)
22668 struct dwarf2_cu
*cu
= reader
.cu
;
22669 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22671 gdb_assert (cu
->die_hash
== NULL
);
22673 htab_create_alloc_ex (cu
->header
.length
/ 12,
22677 &cu
->comp_unit_obstack
,
22678 hashtab_obstack_allocate
,
22679 dummy_obstack_deallocate
);
22681 if (reader
.comp_unit_die
->has_children
)
22682 reader
.comp_unit_die
->child
22683 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22684 reader
.comp_unit_die
);
22685 cu
->dies
= reader
.comp_unit_die
;
22686 /* comp_unit_die is not stored in die_hash, no need. */
22688 /* We try not to read any attributes in this function, because
22689 not all CUs needed for references have been loaded yet, and
22690 symbol table processing isn't initialized. But we have to
22691 set the CU language, or we won't be able to build types
22692 correctly. Similarly, if we do not read the producer, we can
22693 not apply producer-specific interpretation. */
22694 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22699 sig_type
->per_cu
.tu_read
= 1;
22702 /* Decode simple location descriptions.
22703 Given a pointer to a dwarf block that defines a location, compute
22704 the location and return the value. If COMPUTED is non-null, it is
22705 set to true to indicate that decoding was successful, and false
22706 otherwise. If COMPUTED is null, then this function may emit a
22710 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22712 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22714 size_t size
= blk
->size
;
22715 const gdb_byte
*data
= blk
->data
;
22716 CORE_ADDR stack
[64];
22718 unsigned int bytes_read
, unsnd
;
22721 if (computed
!= nullptr)
22727 stack
[++stacki
] = 0;
22766 stack
[++stacki
] = op
- DW_OP_lit0
;
22801 stack
[++stacki
] = op
- DW_OP_reg0
;
22804 if (computed
== nullptr)
22805 dwarf2_complex_location_expr_complaint ();
22812 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22814 stack
[++stacki
] = unsnd
;
22817 if (computed
== nullptr)
22818 dwarf2_complex_location_expr_complaint ();
22825 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22830 case DW_OP_const1u
:
22831 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22835 case DW_OP_const1s
:
22836 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22840 case DW_OP_const2u
:
22841 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22845 case DW_OP_const2s
:
22846 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22850 case DW_OP_const4u
:
22851 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22855 case DW_OP_const4s
:
22856 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22860 case DW_OP_const8u
:
22861 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22866 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22872 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22877 stack
[stacki
+ 1] = stack
[stacki
];
22882 stack
[stacki
- 1] += stack
[stacki
];
22886 case DW_OP_plus_uconst
:
22887 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22893 stack
[stacki
- 1] -= stack
[stacki
];
22898 /* If we're not the last op, then we definitely can't encode
22899 this using GDB's address_class enum. This is valid for partial
22900 global symbols, although the variable's address will be bogus
22904 if (computed
== nullptr)
22905 dwarf2_complex_location_expr_complaint ();
22911 case DW_OP_GNU_push_tls_address
:
22912 case DW_OP_form_tls_address
:
22913 /* The top of the stack has the offset from the beginning
22914 of the thread control block at which the variable is located. */
22915 /* Nothing should follow this operator, so the top of stack would
22917 /* This is valid for partial global symbols, but the variable's
22918 address will be bogus in the psymtab. Make it always at least
22919 non-zero to not look as a variable garbage collected by linker
22920 which have DW_OP_addr 0. */
22923 if (computed
== nullptr)
22924 dwarf2_complex_location_expr_complaint ();
22931 case DW_OP_GNU_uninit
:
22932 if (computed
!= nullptr)
22937 case DW_OP_GNU_addr_index
:
22938 case DW_OP_GNU_const_index
:
22939 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22945 if (computed
== nullptr)
22947 const char *name
= get_DW_OP_name (op
);
22950 complaint (_("unsupported stack op: '%s'"),
22953 complaint (_("unsupported stack op: '%02x'"),
22957 return (stack
[stacki
]);
22960 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22961 outside of the allocated space. Also enforce minimum>0. */
22962 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22964 if (computed
== nullptr)
22965 complaint (_("location description stack overflow"));
22971 if (computed
== nullptr)
22972 complaint (_("location description stack underflow"));
22977 if (computed
!= nullptr)
22979 return (stack
[stacki
]);
22982 /* memory allocation interface */
22984 static struct dwarf_block
*
22985 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22987 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22990 static struct die_info
*
22991 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22993 struct die_info
*die
;
22994 size_t size
= sizeof (struct die_info
);
22997 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22999 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23000 memset (die
, 0, sizeof (struct die_info
));
23006 /* Macro support. */
23008 /* An overload of dwarf_decode_macros that finds the correct section
23009 and ensures it is read in before calling the other overload. */
23012 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23013 int section_is_gnu
)
23015 struct dwarf2_per_objfile
*dwarf2_per_objfile
23016 = cu
->per_cu
->dwarf2_per_objfile
;
23017 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23018 const struct line_header
*lh
= cu
->line_header
;
23019 unsigned int offset_size
= cu
->header
.offset_size
;
23020 struct dwarf2_section_info
*section
;
23021 const char *section_name
;
23023 if (cu
->dwo_unit
!= nullptr)
23025 if (section_is_gnu
)
23027 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23028 section_name
= ".debug_macro.dwo";
23032 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23033 section_name
= ".debug_macinfo.dwo";
23038 if (section_is_gnu
)
23040 section
= &dwarf2_per_objfile
->macro
;
23041 section_name
= ".debug_macro";
23045 section
= &dwarf2_per_objfile
->macinfo
;
23046 section_name
= ".debug_macinfo";
23050 section
->read (objfile
);
23051 if (section
->buffer
== nullptr)
23053 complaint (_("missing %s section"), section_name
);
23057 buildsym_compunit
*builder
= cu
->get_builder ();
23059 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23060 offset_size
, offset
, section_is_gnu
);
23063 /* Return the .debug_loc section to use for CU.
23064 For DWO files use .debug_loc.dwo. */
23066 static struct dwarf2_section_info
*
23067 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23069 struct dwarf2_per_objfile
*dwarf2_per_objfile
23070 = cu
->per_cu
->dwarf2_per_objfile
;
23074 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23076 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23078 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23079 : &dwarf2_per_objfile
->loc
);
23082 /* A helper function that fills in a dwarf2_loclist_baton. */
23085 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23086 struct dwarf2_loclist_baton
*baton
,
23087 const struct attribute
*attr
)
23089 struct dwarf2_per_objfile
*dwarf2_per_objfile
23090 = cu
->per_cu
->dwarf2_per_objfile
;
23091 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23093 section
->read (dwarf2_per_objfile
->objfile
);
23095 baton
->per_cu
= cu
->per_cu
;
23096 gdb_assert (baton
->per_cu
);
23097 /* We don't know how long the location list is, but make sure we
23098 don't run off the edge of the section. */
23099 baton
->size
= section
->size
- DW_UNSND (attr
);
23100 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23101 if (cu
->base_address
.has_value ())
23102 baton
->base_address
= *cu
->base_address
;
23104 baton
->base_address
= 0;
23105 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23109 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23110 struct dwarf2_cu
*cu
, int is_block
)
23112 struct dwarf2_per_objfile
*dwarf2_per_objfile
23113 = cu
->per_cu
->dwarf2_per_objfile
;
23114 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23115 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23117 if (attr
->form_is_section_offset ()
23118 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23119 the section. If so, fall through to the complaint in the
23121 && DW_UNSND (attr
) < section
->get_size (objfile
))
23123 struct dwarf2_loclist_baton
*baton
;
23125 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23127 fill_in_loclist_baton (cu
, baton
, attr
);
23129 if (!cu
->base_address
.has_value ())
23130 complaint (_("Location list used without "
23131 "specifying the CU base address."));
23133 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23134 ? dwarf2_loclist_block_index
23135 : dwarf2_loclist_index
);
23136 SYMBOL_LOCATION_BATON (sym
) = baton
;
23140 struct dwarf2_locexpr_baton
*baton
;
23142 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23143 baton
->per_cu
= cu
->per_cu
;
23144 gdb_assert (baton
->per_cu
);
23146 if (attr
->form_is_block ())
23148 /* Note that we're just copying the block's data pointer
23149 here, not the actual data. We're still pointing into the
23150 info_buffer for SYM's objfile; right now we never release
23151 that buffer, but when we do clean up properly this may
23153 baton
->size
= DW_BLOCK (attr
)->size
;
23154 baton
->data
= DW_BLOCK (attr
)->data
;
23158 dwarf2_invalid_attrib_class_complaint ("location description",
23159 sym
->natural_name ());
23163 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23164 ? dwarf2_locexpr_block_index
23165 : dwarf2_locexpr_index
);
23166 SYMBOL_LOCATION_BATON (sym
) = baton
;
23173 dwarf2_per_cu_data::objfile () const
23175 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23177 /* Return the master objfile, so that we can report and look up the
23178 correct file containing this variable. */
23179 if (objfile
->separate_debug_objfile_backlink
)
23180 objfile
= objfile
->separate_debug_objfile_backlink
;
23185 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23186 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23187 CU_HEADERP first. */
23189 static const struct comp_unit_head
*
23190 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23191 const struct dwarf2_per_cu_data
*per_cu
)
23193 const gdb_byte
*info_ptr
;
23196 return &per_cu
->cu
->header
;
23198 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23200 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23201 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23202 rcuh_kind::COMPILE
);
23210 dwarf2_per_cu_data::addr_size () const
23212 struct comp_unit_head cu_header_local
;
23213 const struct comp_unit_head
*cu_headerp
;
23215 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23217 return cu_headerp
->addr_size
;
23223 dwarf2_per_cu_data::offset_size () const
23225 struct comp_unit_head cu_header_local
;
23226 const struct comp_unit_head
*cu_headerp
;
23228 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23230 return cu_headerp
->offset_size
;
23236 dwarf2_per_cu_data::ref_addr_size () const
23238 struct comp_unit_head cu_header_local
;
23239 const struct comp_unit_head
*cu_headerp
;
23241 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23243 if (cu_headerp
->version
== 2)
23244 return cu_headerp
->addr_size
;
23246 return cu_headerp
->offset_size
;
23252 dwarf2_per_cu_data::text_offset () const
23254 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23256 return objfile
->text_section_offset ();
23262 dwarf2_per_cu_data::addr_type () const
23264 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23265 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23266 struct type
*addr_type
= lookup_pointer_type (void_type
);
23267 int addr_size
= this->addr_size ();
23269 if (TYPE_LENGTH (addr_type
) == addr_size
)
23272 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23276 /* A helper function for dwarf2_find_containing_comp_unit that returns
23277 the index of the result, and that searches a vector. It will
23278 return a result even if the offset in question does not actually
23279 occur in any CU. This is separate so that it can be unit
23283 dwarf2_find_containing_comp_unit
23284 (sect_offset sect_off
,
23285 unsigned int offset_in_dwz
,
23286 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23291 high
= all_comp_units
.size () - 1;
23294 struct dwarf2_per_cu_data
*mid_cu
;
23295 int mid
= low
+ (high
- low
) / 2;
23297 mid_cu
= all_comp_units
[mid
];
23298 if (mid_cu
->is_dwz
> offset_in_dwz
23299 || (mid_cu
->is_dwz
== offset_in_dwz
23300 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23305 gdb_assert (low
== high
);
23309 /* Locate the .debug_info compilation unit from CU's objfile which contains
23310 the DIE at OFFSET. Raises an error on failure. */
23312 static struct dwarf2_per_cu_data
*
23313 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23314 unsigned int offset_in_dwz
,
23315 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23318 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23319 dwarf2_per_objfile
->all_comp_units
);
23320 struct dwarf2_per_cu_data
*this_cu
23321 = dwarf2_per_objfile
->all_comp_units
[low
];
23323 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23325 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23326 error (_("Dwarf Error: could not find partial DIE containing "
23327 "offset %s [in module %s]"),
23328 sect_offset_str (sect_off
),
23329 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23331 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23333 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23337 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23338 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23339 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23340 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23347 namespace selftests
{
23348 namespace find_containing_comp_unit
{
23353 struct dwarf2_per_cu_data one
{};
23354 struct dwarf2_per_cu_data two
{};
23355 struct dwarf2_per_cu_data three
{};
23356 struct dwarf2_per_cu_data four
{};
23359 two
.sect_off
= sect_offset (one
.length
);
23364 four
.sect_off
= sect_offset (three
.length
);
23368 std::vector
<dwarf2_per_cu_data
*> units
;
23369 units
.push_back (&one
);
23370 units
.push_back (&two
);
23371 units
.push_back (&three
);
23372 units
.push_back (&four
);
23376 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23377 SELF_CHECK (units
[result
] == &one
);
23378 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23379 SELF_CHECK (units
[result
] == &one
);
23380 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23381 SELF_CHECK (units
[result
] == &two
);
23383 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23384 SELF_CHECK (units
[result
] == &three
);
23385 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23386 SELF_CHECK (units
[result
] == &three
);
23387 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23388 SELF_CHECK (units
[result
] == &four
);
23394 #endif /* GDB_SELF_TEST */
23396 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23398 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23399 : per_cu (per_cu_
),
23401 has_loclist (false),
23402 checked_producer (false),
23403 producer_is_gxx_lt_4_6 (false),
23404 producer_is_gcc_lt_4_3 (false),
23405 producer_is_icc (false),
23406 producer_is_icc_lt_14 (false),
23407 producer_is_codewarrior (false),
23408 processing_has_namespace_info (false)
23413 /* Destroy a dwarf2_cu. */
23415 dwarf2_cu::~dwarf2_cu ()
23420 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23423 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23424 enum language pretend_language
)
23426 struct attribute
*attr
;
23428 /* Set the language we're debugging. */
23429 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23430 if (attr
!= nullptr)
23431 set_cu_language (DW_UNSND (attr
), cu
);
23434 cu
->language
= pretend_language
;
23435 cu
->language_defn
= language_def (cu
->language
);
23438 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23441 /* Increase the age counter on each cached compilation unit, and free
23442 any that are too old. */
23445 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23447 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23449 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23450 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23451 while (per_cu
!= NULL
)
23453 per_cu
->cu
->last_used
++;
23454 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23455 dwarf2_mark (per_cu
->cu
);
23456 per_cu
= per_cu
->cu
->read_in_chain
;
23459 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23460 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23461 while (per_cu
!= NULL
)
23463 struct dwarf2_per_cu_data
*next_cu
;
23465 next_cu
= per_cu
->cu
->read_in_chain
;
23467 if (!per_cu
->cu
->mark
)
23470 *last_chain
= next_cu
;
23473 last_chain
= &per_cu
->cu
->read_in_chain
;
23479 /* Remove a single compilation unit from the cache. */
23482 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23484 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23485 struct dwarf2_per_objfile
*dwarf2_per_objfile
23486 = target_per_cu
->dwarf2_per_objfile
;
23488 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23489 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23490 while (per_cu
!= NULL
)
23492 struct dwarf2_per_cu_data
*next_cu
;
23494 next_cu
= per_cu
->cu
->read_in_chain
;
23496 if (per_cu
== target_per_cu
)
23500 *last_chain
= next_cu
;
23504 last_chain
= &per_cu
->cu
->read_in_chain
;
23510 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23511 We store these in a hash table separate from the DIEs, and preserve them
23512 when the DIEs are flushed out of cache.
23514 The CU "per_cu" pointer is needed because offset alone is not enough to
23515 uniquely identify the type. A file may have multiple .debug_types sections,
23516 or the type may come from a DWO file. Furthermore, while it's more logical
23517 to use per_cu->section+offset, with Fission the section with the data is in
23518 the DWO file but we don't know that section at the point we need it.
23519 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23520 because we can enter the lookup routine, get_die_type_at_offset, from
23521 outside this file, and thus won't necessarily have PER_CU->cu.
23522 Fortunately, PER_CU is stable for the life of the objfile. */
23524 struct dwarf2_per_cu_offset_and_type
23526 const struct dwarf2_per_cu_data
*per_cu
;
23527 sect_offset sect_off
;
23531 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23534 per_cu_offset_and_type_hash (const void *item
)
23536 const struct dwarf2_per_cu_offset_and_type
*ofs
23537 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23539 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23542 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23545 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23547 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23548 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23549 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23550 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23552 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23553 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23556 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23557 table if necessary. For convenience, return TYPE.
23559 The DIEs reading must have careful ordering to:
23560 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23561 reading current DIE.
23562 * Not trying to dereference contents of still incompletely read in types
23563 while reading in other DIEs.
23564 * Enable referencing still incompletely read in types just by a pointer to
23565 the type without accessing its fields.
23567 Therefore caller should follow these rules:
23568 * Try to fetch any prerequisite types we may need to build this DIE type
23569 before building the type and calling set_die_type.
23570 * After building type call set_die_type for current DIE as soon as
23571 possible before fetching more types to complete the current type.
23572 * Make the type as complete as possible before fetching more types. */
23574 static struct type
*
23575 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23577 struct dwarf2_per_objfile
*dwarf2_per_objfile
23578 = cu
->per_cu
->dwarf2_per_objfile
;
23579 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23580 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23581 struct attribute
*attr
;
23582 struct dynamic_prop prop
;
23584 /* For Ada types, make sure that the gnat-specific data is always
23585 initialized (if not already set). There are a few types where
23586 we should not be doing so, because the type-specific area is
23587 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23588 where the type-specific area is used to store the floatformat).
23589 But this is not a problem, because the gnat-specific information
23590 is actually not needed for these types. */
23591 if (need_gnat_info (cu
)
23592 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23593 && TYPE_CODE (type
) != TYPE_CODE_FLT
23594 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23595 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23596 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23597 && !HAVE_GNAT_AUX_INFO (type
))
23598 INIT_GNAT_SPECIFIC (type
);
23600 /* Read DW_AT_allocated and set in type. */
23601 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23602 if (attr
!= NULL
&& attr
->form_is_block ())
23604 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23605 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23606 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23608 else if (attr
!= NULL
)
23610 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23611 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23612 sect_offset_str (die
->sect_off
));
23615 /* Read DW_AT_associated and set in type. */
23616 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23617 if (attr
!= NULL
&& attr
->form_is_block ())
23619 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23620 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23621 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23623 else if (attr
!= NULL
)
23625 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23626 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23627 sect_offset_str (die
->sect_off
));
23630 /* Read DW_AT_data_location and set in type. */
23631 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23632 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23633 cu
->per_cu
->addr_type ()))
23634 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23636 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23637 dwarf2_per_objfile
->die_type_hash
23638 = htab_up (htab_create_alloc (127,
23639 per_cu_offset_and_type_hash
,
23640 per_cu_offset_and_type_eq
,
23641 NULL
, xcalloc
, xfree
));
23643 ofs
.per_cu
= cu
->per_cu
;
23644 ofs
.sect_off
= die
->sect_off
;
23646 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23647 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23649 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23650 sect_offset_str (die
->sect_off
));
23651 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23652 struct dwarf2_per_cu_offset_and_type
);
23657 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23658 or return NULL if the die does not have a saved type. */
23660 static struct type
*
23661 get_die_type_at_offset (sect_offset sect_off
,
23662 struct dwarf2_per_cu_data
*per_cu
)
23664 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23665 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23667 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23670 ofs
.per_cu
= per_cu
;
23671 ofs
.sect_off
= sect_off
;
23672 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23673 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23680 /* Look up the type for DIE in CU in die_type_hash,
23681 or return NULL if DIE does not have a saved type. */
23683 static struct type
*
23684 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23686 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23689 /* Add a dependence relationship from CU to REF_PER_CU. */
23692 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23693 struct dwarf2_per_cu_data
*ref_per_cu
)
23697 if (cu
->dependencies
== NULL
)
23699 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23700 NULL
, &cu
->comp_unit_obstack
,
23701 hashtab_obstack_allocate
,
23702 dummy_obstack_deallocate
);
23704 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23706 *slot
= ref_per_cu
;
23709 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23710 Set the mark field in every compilation unit in the
23711 cache that we must keep because we are keeping CU. */
23714 dwarf2_mark_helper (void **slot
, void *data
)
23716 struct dwarf2_per_cu_data
*per_cu
;
23718 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23720 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23721 reading of the chain. As such dependencies remain valid it is not much
23722 useful to track and undo them during QUIT cleanups. */
23723 if (per_cu
->cu
== NULL
)
23726 if (per_cu
->cu
->mark
)
23728 per_cu
->cu
->mark
= true;
23730 if (per_cu
->cu
->dependencies
!= NULL
)
23731 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23736 /* Set the mark field in CU and in every other compilation unit in the
23737 cache that we must keep because we are keeping CU. */
23740 dwarf2_mark (struct dwarf2_cu
*cu
)
23745 if (cu
->dependencies
!= NULL
)
23746 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23750 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23754 per_cu
->cu
->mark
= false;
23755 per_cu
= per_cu
->cu
->read_in_chain
;
23759 /* Trivial hash function for partial_die_info: the hash value of a DIE
23760 is its offset in .debug_info for this objfile. */
23763 partial_die_hash (const void *item
)
23765 const struct partial_die_info
*part_die
23766 = (const struct partial_die_info
*) item
;
23768 return to_underlying (part_die
->sect_off
);
23771 /* Trivial comparison function for partial_die_info structures: two DIEs
23772 are equal if they have the same offset. */
23775 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23777 const struct partial_die_info
*part_die_lhs
23778 = (const struct partial_die_info
*) item_lhs
;
23779 const struct partial_die_info
*part_die_rhs
23780 = (const struct partial_die_info
*) item_rhs
;
23782 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23785 struct cmd_list_element
*set_dwarf_cmdlist
;
23786 struct cmd_list_element
*show_dwarf_cmdlist
;
23789 show_check_physname (struct ui_file
*file
, int from_tty
,
23790 struct cmd_list_element
*c
, const char *value
)
23792 fprintf_filtered (file
,
23793 _("Whether to check \"physname\" is %s.\n"),
23797 void _initialize_dwarf2_read ();
23799 _initialize_dwarf2_read ()
23801 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23802 Set DWARF specific variables.\n\
23803 Configure DWARF variables such as the cache size."),
23804 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23805 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23807 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23808 Show DWARF specific variables.\n\
23809 Show DWARF variables such as the cache size."),
23810 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23811 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23813 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23814 &dwarf_max_cache_age
, _("\
23815 Set the upper bound on the age of cached DWARF compilation units."), _("\
23816 Show the upper bound on the age of cached DWARF compilation units."), _("\
23817 A higher limit means that cached compilation units will be stored\n\
23818 in memory longer, and more total memory will be used. Zero disables\n\
23819 caching, which can slow down startup."),
23821 show_dwarf_max_cache_age
,
23822 &set_dwarf_cmdlist
,
23823 &show_dwarf_cmdlist
);
23825 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23826 Set debugging of the DWARF reader."), _("\
23827 Show debugging of the DWARF reader."), _("\
23828 When enabled (non-zero), debugging messages are printed during DWARF\n\
23829 reading and symtab expansion. A value of 1 (one) provides basic\n\
23830 information. A value greater than 1 provides more verbose information."),
23833 &setdebuglist
, &showdebuglist
);
23835 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23836 Set debugging of the DWARF DIE reader."), _("\
23837 Show debugging of the DWARF DIE reader."), _("\
23838 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23839 The value is the maximum depth to print."),
23842 &setdebuglist
, &showdebuglist
);
23844 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23845 Set debugging of the dwarf line reader."), _("\
23846 Show debugging of the dwarf line reader."), _("\
23847 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23848 A value of 1 (one) provides basic information.\n\
23849 A value greater than 1 provides more verbose information."),
23852 &setdebuglist
, &showdebuglist
);
23854 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23855 Set cross-checking of \"physname\" code against demangler."), _("\
23856 Show cross-checking of \"physname\" code against demangler."), _("\
23857 When enabled, GDB's internal \"physname\" code is checked against\n\
23859 NULL
, show_check_physname
,
23860 &setdebuglist
, &showdebuglist
);
23862 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23863 no_class
, &use_deprecated_index_sections
, _("\
23864 Set whether to use deprecated gdb_index sections."), _("\
23865 Show whether to use deprecated gdb_index sections."), _("\
23866 When enabled, deprecated .gdb_index sections are used anyway.\n\
23867 Normally they are ignored either because of a missing feature or\n\
23868 performance issue.\n\
23869 Warning: This option must be enabled before gdb reads the file."),
23872 &setlist
, &showlist
);
23874 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23875 &dwarf2_locexpr_funcs
);
23876 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23877 &dwarf2_loclist_funcs
);
23879 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23880 &dwarf2_block_frame_base_locexpr_funcs
);
23881 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23882 &dwarf2_block_frame_base_loclist_funcs
);
23885 selftests::register_test ("dw2_expand_symtabs_matching",
23886 selftests::dw2_expand_symtabs_matching::run_test
);
23887 selftests::register_test ("dwarf2_find_containing_comp_unit",
23888 selftests::find_containing_comp_unit::run_test
);