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
*);
1440 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1441 struct dwarf2_cu
*);
1443 static struct die_info
*read_die_and_siblings_1
1444 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1447 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1448 const gdb_byte
*info_ptr
,
1449 const gdb_byte
**new_info_ptr
,
1450 struct die_info
*parent
);
1452 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1453 struct die_info
**, const gdb_byte
*,
1456 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1457 struct die_info
**, const gdb_byte
*);
1459 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1461 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1464 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1466 static const char *dwarf2_full_name (const char *name
,
1467 struct die_info
*die
,
1468 struct dwarf2_cu
*cu
);
1470 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1471 struct dwarf2_cu
*cu
);
1473 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1474 struct dwarf2_cu
**);
1476 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1478 static void dump_die_for_error (struct die_info
*);
1480 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1483 /*static*/ void dump_die (struct die_info
*, int max_level
);
1485 static void store_in_ref_table (struct die_info
*,
1486 struct dwarf2_cu
*);
1488 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1489 const struct attribute
*,
1490 struct dwarf2_cu
**);
1492 static struct die_info
*follow_die_ref (struct die_info
*,
1493 const struct attribute
*,
1494 struct dwarf2_cu
**);
1496 static struct die_info
*follow_die_sig (struct die_info
*,
1497 const struct attribute
*,
1498 struct dwarf2_cu
**);
1500 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1501 struct dwarf2_cu
*);
1503 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1504 const struct attribute
*,
1505 struct dwarf2_cu
*);
1507 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1509 static void read_signatured_type (struct signatured_type
*);
1511 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1512 struct die_info
*die
, struct dwarf2_cu
*cu
,
1513 struct dynamic_prop
*prop
, struct type
*type
);
1515 /* memory allocation interface */
1517 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1519 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1521 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1523 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1524 struct dwarf2_loclist_baton
*baton
,
1525 const struct attribute
*attr
);
1527 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1529 struct dwarf2_cu
*cu
,
1532 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1533 const gdb_byte
*info_ptr
,
1534 struct abbrev_info
*abbrev
);
1536 static hashval_t
partial_die_hash (const void *item
);
1538 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1540 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1541 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1542 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1544 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1545 struct die_info
*comp_unit_die
,
1546 enum language pretend_language
);
1548 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1550 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1552 static struct type
*set_die_type (struct die_info
*, struct type
*,
1553 struct dwarf2_cu
*);
1555 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1557 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1559 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1562 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1565 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1568 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1569 struct dwarf2_per_cu_data
*);
1571 static void dwarf2_mark (struct dwarf2_cu
*);
1573 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1575 static struct type
*get_die_type_at_offset (sect_offset
,
1576 struct dwarf2_per_cu_data
*);
1578 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1580 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1581 enum language pretend_language
);
1583 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1585 /* Class, the destructor of which frees all allocated queue entries. This
1586 will only have work to do if an error was thrown while processing the
1587 dwarf. If no error was thrown then the queue entries should have all
1588 been processed, and freed, as we went along. */
1590 class dwarf2_queue_guard
1593 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1594 : m_per_objfile (per_objfile
)
1598 /* Free any entries remaining on the queue. There should only be
1599 entries left if we hit an error while processing the dwarf. */
1600 ~dwarf2_queue_guard ()
1602 /* Ensure that no memory is allocated by the queue. */
1603 std::queue
<dwarf2_queue_item
> empty
;
1604 std::swap (m_per_objfile
->queue
, empty
);
1607 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1610 dwarf2_per_objfile
*m_per_objfile
;
1613 dwarf2_queue_item::~dwarf2_queue_item ()
1615 /* Anything still marked queued is likely to be in an
1616 inconsistent state, so discard it. */
1619 if (per_cu
->cu
!= NULL
)
1620 free_one_cached_comp_unit (per_cu
);
1625 /* The return type of find_file_and_directory. Note, the enclosed
1626 string pointers are only valid while this object is valid. */
1628 struct file_and_directory
1630 /* The filename. This is never NULL. */
1633 /* The compilation directory. NULL if not known. If we needed to
1634 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1635 points directly to the DW_AT_comp_dir string attribute owned by
1636 the obstack that owns the DIE. */
1637 const char *comp_dir
;
1639 /* If we needed to build a new string for comp_dir, this is what
1640 owns the storage. */
1641 std::string comp_dir_storage
;
1644 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1645 struct dwarf2_cu
*cu
);
1647 static htab_up
allocate_signatured_type_table ();
1649 static htab_up
allocate_dwo_unit_table ();
1651 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1652 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1653 struct dwp_file
*dwp_file
, const char *comp_dir
,
1654 ULONGEST signature
, int is_debug_types
);
1656 static struct dwp_file
*get_dwp_file
1657 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1659 static struct dwo_unit
*lookup_dwo_comp_unit
1660 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1662 static struct dwo_unit
*lookup_dwo_type_unit
1663 (struct signatured_type
*, const char *, const char *);
1665 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1667 /* A unique pointer to a dwo_file. */
1669 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1671 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1673 static void check_producer (struct dwarf2_cu
*cu
);
1675 static void free_line_header_voidp (void *arg
);
1677 /* Various complaints about symbol reading that don't abort the process. */
1680 dwarf2_debug_line_missing_file_complaint (void)
1682 complaint (_(".debug_line section has line data without a file"));
1686 dwarf2_debug_line_missing_end_sequence_complaint (void)
1688 complaint (_(".debug_line section has line "
1689 "program sequence without an end"));
1693 dwarf2_complex_location_expr_complaint (void)
1695 complaint (_("location expression too complex"));
1699 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1702 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1707 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1709 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1713 /* Hash function for line_header_hash. */
1716 line_header_hash (const struct line_header
*ofs
)
1718 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1721 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1724 line_header_hash_voidp (const void *item
)
1726 const struct line_header
*ofs
= (const struct line_header
*) item
;
1728 return line_header_hash (ofs
);
1731 /* Equality function for line_header_hash. */
1734 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1736 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1737 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1739 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1740 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1745 /* See declaration. */
1747 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
1748 const dwarf2_debug_sections
*names
,
1750 : objfile (objfile_
),
1751 can_copy (can_copy_
)
1754 names
= &dwarf2_elf_names
;
1756 bfd
*obfd
= objfile
->obfd
;
1758 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1759 locate_sections (obfd
, sec
, *names
);
1762 dwarf2_per_objfile::~dwarf2_per_objfile ()
1764 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1765 free_cached_comp_units ();
1767 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1768 per_cu
->imported_symtabs_free ();
1770 for (signatured_type
*sig_type
: all_type_units
)
1771 sig_type
->per_cu
.imported_symtabs_free ();
1773 /* Everything else should be on the objfile obstack. */
1776 /* See declaration. */
1779 dwarf2_per_objfile::free_cached_comp_units ()
1781 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1782 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1783 while (per_cu
!= NULL
)
1785 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1788 *last_chain
= next_cu
;
1793 /* A helper class that calls free_cached_comp_units on
1796 class free_cached_comp_units
1800 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1801 : m_per_objfile (per_objfile
)
1805 ~free_cached_comp_units ()
1807 m_per_objfile
->free_cached_comp_units ();
1810 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1814 dwarf2_per_objfile
*m_per_objfile
;
1817 /* Try to locate the sections we need for DWARF 2 debugging
1818 information and return true if we have enough to do something.
1819 NAMES points to the dwarf2 section names, or is NULL if the standard
1820 ELF names are used. CAN_COPY is true for formats where symbol
1821 interposition is possible and so symbol values must follow copy
1822 relocation rules. */
1825 dwarf2_has_info (struct objfile
*objfile
,
1826 const struct dwarf2_debug_sections
*names
,
1829 if (objfile
->flags
& OBJF_READNEVER
)
1832 struct dwarf2_per_objfile
*dwarf2_per_objfile
1833 = get_dwarf2_per_objfile (objfile
);
1835 if (dwarf2_per_objfile
== NULL
)
1836 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
1840 return (!dwarf2_per_objfile
->info
.is_virtual
1841 && dwarf2_per_objfile
->info
.s
.section
!= NULL
1842 && !dwarf2_per_objfile
->abbrev
.is_virtual
1843 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
1846 /* When loading sections, we look either for uncompressed section or for
1847 compressed section names. */
1850 section_is_p (const char *section_name
,
1851 const struct dwarf2_section_names
*names
)
1853 if (names
->normal
!= NULL
1854 && strcmp (section_name
, names
->normal
) == 0)
1856 if (names
->compressed
!= NULL
1857 && strcmp (section_name
, names
->compressed
) == 0)
1862 /* See declaration. */
1865 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
1866 const dwarf2_debug_sections
&names
)
1868 flagword aflag
= bfd_section_flags (sectp
);
1870 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1873 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1874 > bfd_get_file_size (abfd
))
1876 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1877 warning (_("Discarding section %s which has a section size (%s"
1878 ") larger than the file size [in module %s]"),
1879 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1880 bfd_get_filename (abfd
));
1882 else if (section_is_p (sectp
->name
, &names
.info
))
1884 this->info
.s
.section
= sectp
;
1885 this->info
.size
= bfd_section_size (sectp
);
1887 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1889 this->abbrev
.s
.section
= sectp
;
1890 this->abbrev
.size
= bfd_section_size (sectp
);
1892 else if (section_is_p (sectp
->name
, &names
.line
))
1894 this->line
.s
.section
= sectp
;
1895 this->line
.size
= bfd_section_size (sectp
);
1897 else if (section_is_p (sectp
->name
, &names
.loc
))
1899 this->loc
.s
.section
= sectp
;
1900 this->loc
.size
= bfd_section_size (sectp
);
1902 else if (section_is_p (sectp
->name
, &names
.loclists
))
1904 this->loclists
.s
.section
= sectp
;
1905 this->loclists
.size
= bfd_section_size (sectp
);
1907 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1909 this->macinfo
.s
.section
= sectp
;
1910 this->macinfo
.size
= bfd_section_size (sectp
);
1912 else if (section_is_p (sectp
->name
, &names
.macro
))
1914 this->macro
.s
.section
= sectp
;
1915 this->macro
.size
= bfd_section_size (sectp
);
1917 else if (section_is_p (sectp
->name
, &names
.str
))
1919 this->str
.s
.section
= sectp
;
1920 this->str
.size
= bfd_section_size (sectp
);
1922 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1924 this->str_offsets
.s
.section
= sectp
;
1925 this->str_offsets
.size
= bfd_section_size (sectp
);
1927 else if (section_is_p (sectp
->name
, &names
.line_str
))
1929 this->line_str
.s
.section
= sectp
;
1930 this->line_str
.size
= bfd_section_size (sectp
);
1932 else if (section_is_p (sectp
->name
, &names
.addr
))
1934 this->addr
.s
.section
= sectp
;
1935 this->addr
.size
= bfd_section_size (sectp
);
1937 else if (section_is_p (sectp
->name
, &names
.frame
))
1939 this->frame
.s
.section
= sectp
;
1940 this->frame
.size
= bfd_section_size (sectp
);
1942 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1944 this->eh_frame
.s
.section
= sectp
;
1945 this->eh_frame
.size
= bfd_section_size (sectp
);
1947 else if (section_is_p (sectp
->name
, &names
.ranges
))
1949 this->ranges
.s
.section
= sectp
;
1950 this->ranges
.size
= bfd_section_size (sectp
);
1952 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1954 this->rnglists
.s
.section
= sectp
;
1955 this->rnglists
.size
= bfd_section_size (sectp
);
1957 else if (section_is_p (sectp
->name
, &names
.types
))
1959 struct dwarf2_section_info type_section
;
1961 memset (&type_section
, 0, sizeof (type_section
));
1962 type_section
.s
.section
= sectp
;
1963 type_section
.size
= bfd_section_size (sectp
);
1965 this->types
.push_back (type_section
);
1967 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
1969 this->gdb_index
.s
.section
= sectp
;
1970 this->gdb_index
.size
= bfd_section_size (sectp
);
1972 else if (section_is_p (sectp
->name
, &names
.debug_names
))
1974 this->debug_names
.s
.section
= sectp
;
1975 this->debug_names
.size
= bfd_section_size (sectp
);
1977 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
1979 this->debug_aranges
.s
.section
= sectp
;
1980 this->debug_aranges
.size
= bfd_section_size (sectp
);
1983 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
1984 && bfd_section_vma (sectp
) == 0)
1985 this->has_section_at_zero
= true;
1988 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1992 dwarf2_get_section_info (struct objfile
*objfile
,
1993 enum dwarf2_section_enum sect
,
1994 asection
**sectp
, const gdb_byte
**bufp
,
1995 bfd_size_type
*sizep
)
1997 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
1998 struct dwarf2_section_info
*info
;
2000 /* We may see an objfile without any DWARF, in which case we just
2011 case DWARF2_DEBUG_FRAME
:
2012 info
= &data
->frame
;
2014 case DWARF2_EH_FRAME
:
2015 info
= &data
->eh_frame
;
2018 gdb_assert_not_reached ("unexpected section");
2021 info
->read (objfile
);
2023 *sectp
= info
->get_bfd_section ();
2024 *bufp
= info
->buffer
;
2025 *sizep
= info
->size
;
2028 /* A helper function to find the sections for a .dwz file. */
2031 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2033 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2035 /* Note that we only support the standard ELF names, because .dwz
2036 is ELF-only (at the time of writing). */
2037 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2039 dwz_file
->abbrev
.s
.section
= sectp
;
2040 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2042 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2044 dwz_file
->info
.s
.section
= sectp
;
2045 dwz_file
->info
.size
= bfd_section_size (sectp
);
2047 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2049 dwz_file
->str
.s
.section
= sectp
;
2050 dwz_file
->str
.size
= bfd_section_size (sectp
);
2052 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2054 dwz_file
->line
.s
.section
= sectp
;
2055 dwz_file
->line
.size
= bfd_section_size (sectp
);
2057 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2059 dwz_file
->macro
.s
.section
= sectp
;
2060 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2062 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2064 dwz_file
->gdb_index
.s
.section
= sectp
;
2065 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2067 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2069 dwz_file
->debug_names
.s
.section
= sectp
;
2070 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2074 /* See dwarf2read.h. */
2077 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2079 const char *filename
;
2080 bfd_size_type buildid_len_arg
;
2084 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2085 return dwarf2_per_objfile
->dwz_file
.get ();
2087 bfd_set_error (bfd_error_no_error
);
2088 gdb::unique_xmalloc_ptr
<char> data
2089 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2090 &buildid_len_arg
, &buildid
));
2093 if (bfd_get_error () == bfd_error_no_error
)
2095 error (_("could not read '.gnu_debugaltlink' section: %s"),
2096 bfd_errmsg (bfd_get_error ()));
2099 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2101 buildid_len
= (size_t) buildid_len_arg
;
2103 filename
= data
.get ();
2105 std::string abs_storage
;
2106 if (!IS_ABSOLUTE_PATH (filename
))
2108 gdb::unique_xmalloc_ptr
<char> abs
2109 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2111 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2112 filename
= abs_storage
.c_str ();
2115 /* First try the file name given in the section. If that doesn't
2116 work, try to use the build-id instead. */
2117 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2118 if (dwz_bfd
!= NULL
)
2120 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2121 dwz_bfd
.reset (nullptr);
2124 if (dwz_bfd
== NULL
)
2125 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2127 if (dwz_bfd
== nullptr)
2129 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2130 const char *origname
= dwarf2_per_objfile
->objfile
->original_name
;
2132 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2139 /* File successfully retrieved from server. */
2140 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
, -1);
2142 if (dwz_bfd
== nullptr)
2143 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2144 alt_filename
.get ());
2145 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2146 dwz_bfd
.reset (nullptr);
2150 if (dwz_bfd
== NULL
)
2151 error (_("could not find '.gnu_debugaltlink' file for %s"),
2152 objfile_name (dwarf2_per_objfile
->objfile
));
2154 std::unique_ptr
<struct dwz_file
> result
2155 (new struct dwz_file (std::move (dwz_bfd
)));
2157 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2160 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2161 result
->dwz_bfd
.get ());
2162 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2163 return dwarf2_per_objfile
->dwz_file
.get ();
2166 /* DWARF quick_symbols_functions support. */
2168 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2169 unique line tables, so we maintain a separate table of all .debug_line
2170 derived entries to support the sharing.
2171 All the quick functions need is the list of file names. We discard the
2172 line_header when we're done and don't need to record it here. */
2173 struct quick_file_names
2175 /* The data used to construct the hash key. */
2176 struct stmt_list_hash hash
;
2178 /* The number of entries in file_names, real_names. */
2179 unsigned int num_file_names
;
2181 /* The file names from the line table, after being run through
2183 const char **file_names
;
2185 /* The file names from the line table after being run through
2186 gdb_realpath. These are computed lazily. */
2187 const char **real_names
;
2190 /* When using the index (and thus not using psymtabs), each CU has an
2191 object of this type. This is used to hold information needed by
2192 the various "quick" methods. */
2193 struct dwarf2_per_cu_quick_data
2195 /* The file table. This can be NULL if there was no file table
2196 or it's currently not read in.
2197 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2198 struct quick_file_names
*file_names
;
2200 /* The corresponding symbol table. This is NULL if symbols for this
2201 CU have not yet been read. */
2202 struct compunit_symtab
*compunit_symtab
;
2204 /* A temporary mark bit used when iterating over all CUs in
2205 expand_symtabs_matching. */
2206 unsigned int mark
: 1;
2208 /* True if we've tried to read the file table and found there isn't one.
2209 There will be no point in trying to read it again next time. */
2210 unsigned int no_file_data
: 1;
2213 /* Utility hash function for a stmt_list_hash. */
2216 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2220 if (stmt_list_hash
->dwo_unit
!= NULL
)
2221 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2222 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2226 /* Utility equality function for a stmt_list_hash. */
2229 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2230 const struct stmt_list_hash
*rhs
)
2232 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2234 if (lhs
->dwo_unit
!= NULL
2235 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2238 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2241 /* Hash function for a quick_file_names. */
2244 hash_file_name_entry (const void *e
)
2246 const struct quick_file_names
*file_data
2247 = (const struct quick_file_names
*) e
;
2249 return hash_stmt_list_entry (&file_data
->hash
);
2252 /* Equality function for a quick_file_names. */
2255 eq_file_name_entry (const void *a
, const void *b
)
2257 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2258 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2260 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2263 /* Delete function for a quick_file_names. */
2266 delete_file_name_entry (void *e
)
2268 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2271 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2273 xfree ((void*) file_data
->file_names
[i
]);
2274 if (file_data
->real_names
)
2275 xfree ((void*) file_data
->real_names
[i
]);
2278 /* The space for the struct itself lives on objfile_obstack,
2279 so we don't free it here. */
2282 /* Create a quick_file_names hash table. */
2285 create_quick_file_names_table (unsigned int nr_initial_entries
)
2287 return htab_up (htab_create_alloc (nr_initial_entries
,
2288 hash_file_name_entry
, eq_file_name_entry
,
2289 delete_file_name_entry
, xcalloc
, xfree
));
2292 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2293 have to be created afterwards. You should call age_cached_comp_units after
2294 processing PER_CU->CU. dw2_setup must have been already called. */
2297 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2299 if (per_cu
->is_debug_types
)
2300 load_full_type_unit (per_cu
);
2302 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2304 if (per_cu
->cu
== NULL
)
2305 return; /* Dummy CU. */
2307 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2310 /* Read in the symbols for PER_CU. */
2313 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2315 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2317 /* Skip type_unit_groups, reading the type units they contain
2318 is handled elsewhere. */
2319 if (per_cu
->type_unit_group_p ())
2322 /* The destructor of dwarf2_queue_guard frees any entries left on
2323 the queue. After this point we're guaranteed to leave this function
2324 with the dwarf queue empty. */
2325 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2327 if (dwarf2_per_objfile
->using_index
2328 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2329 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2331 queue_comp_unit (per_cu
, language_minimal
);
2332 load_cu (per_cu
, skip_partial
);
2334 /* If we just loaded a CU from a DWO, and we're working with an index
2335 that may badly handle TUs, load all the TUs in that DWO as well.
2336 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2337 if (!per_cu
->is_debug_types
2338 && per_cu
->cu
!= NULL
2339 && per_cu
->cu
->dwo_unit
!= NULL
2340 && dwarf2_per_objfile
->index_table
!= NULL
2341 && dwarf2_per_objfile
->index_table
->version
<= 7
2342 /* DWP files aren't supported yet. */
2343 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2344 queue_and_load_all_dwo_tus (per_cu
);
2347 process_queue (dwarf2_per_objfile
);
2349 /* Age the cache, releasing compilation units that have not
2350 been used recently. */
2351 age_cached_comp_units (dwarf2_per_objfile
);
2354 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2355 the objfile from which this CU came. Returns the resulting symbol
2358 static struct compunit_symtab
*
2359 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2361 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2363 gdb_assert (dwarf2_per_objfile
->using_index
);
2364 if (!per_cu
->v
.quick
->compunit_symtab
)
2366 free_cached_comp_units
freer (dwarf2_per_objfile
);
2367 scoped_restore decrementer
= increment_reading_symtab ();
2368 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2369 process_cu_includes (dwarf2_per_objfile
);
2372 return per_cu
->v
.quick
->compunit_symtab
;
2375 /* See declaration. */
2377 dwarf2_per_cu_data
*
2378 dwarf2_per_objfile::get_cutu (int index
)
2380 if (index
>= this->all_comp_units
.size ())
2382 index
-= this->all_comp_units
.size ();
2383 gdb_assert (index
< this->all_type_units
.size ());
2384 return &this->all_type_units
[index
]->per_cu
;
2387 return this->all_comp_units
[index
];
2390 /* See declaration. */
2392 dwarf2_per_cu_data
*
2393 dwarf2_per_objfile::get_cu (int index
)
2395 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2397 return this->all_comp_units
[index
];
2400 /* See declaration. */
2403 dwarf2_per_objfile::get_tu (int index
)
2405 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2407 return this->all_type_units
[index
];
2410 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2411 objfile_obstack, and constructed with the specified field
2414 static dwarf2_per_cu_data
*
2415 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2416 struct dwarf2_section_info
*section
,
2418 sect_offset sect_off
, ULONGEST length
)
2420 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2421 dwarf2_per_cu_data
*the_cu
2422 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2423 struct dwarf2_per_cu_data
);
2424 the_cu
->sect_off
= sect_off
;
2425 the_cu
->length
= length
;
2426 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2427 the_cu
->section
= section
;
2428 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2429 struct dwarf2_per_cu_quick_data
);
2430 the_cu
->is_dwz
= is_dwz
;
2434 /* A helper for create_cus_from_index that handles a given list of
2438 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2439 const gdb_byte
*cu_list
, offset_type n_elements
,
2440 struct dwarf2_section_info
*section
,
2443 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2445 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2447 sect_offset sect_off
2448 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2449 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2452 dwarf2_per_cu_data
*per_cu
2453 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2455 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2459 /* Read the CU list from the mapped index, and use it to create all
2460 the CU objects for this objfile. */
2463 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2464 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2465 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2467 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
2468 dwarf2_per_objfile
->all_comp_units
.reserve
2469 ((cu_list_elements
+ dwz_elements
) / 2);
2471 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2472 &dwarf2_per_objfile
->info
, 0);
2474 if (dwz_elements
== 0)
2477 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
2478 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2482 /* Create the signatured type hash table from the index. */
2485 create_signatured_type_table_from_index
2486 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2487 struct dwarf2_section_info
*section
,
2488 const gdb_byte
*bytes
,
2489 offset_type elements
)
2491 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2493 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2494 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
2496 htab_up sig_types_hash
= allocate_signatured_type_table ();
2498 for (offset_type i
= 0; i
< elements
; i
+= 3)
2500 struct signatured_type
*sig_type
;
2503 cu_offset type_offset_in_tu
;
2505 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2506 sect_offset sect_off
2507 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2509 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2511 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2514 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2515 struct signatured_type
);
2516 sig_type
->signature
= signature
;
2517 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2518 sig_type
->per_cu
.is_debug_types
= 1;
2519 sig_type
->per_cu
.section
= section
;
2520 sig_type
->per_cu
.sect_off
= sect_off
;
2521 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2522 sig_type
->per_cu
.v
.quick
2523 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2524 struct dwarf2_per_cu_quick_data
);
2526 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2529 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2532 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2535 /* Create the signatured type hash table from .debug_names. */
2538 create_signatured_type_table_from_debug_names
2539 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2540 const mapped_debug_names
&map
,
2541 struct dwarf2_section_info
*section
,
2542 struct dwarf2_section_info
*abbrev_section
)
2544 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2546 section
->read (objfile
);
2547 abbrev_section
->read (objfile
);
2549 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
2550 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
2552 htab_up sig_types_hash
= allocate_signatured_type_table ();
2554 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2556 struct signatured_type
*sig_type
;
2559 sect_offset sect_off
2560 = (sect_offset
) (extract_unsigned_integer
2561 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2563 map
.dwarf5_byte_order
));
2565 comp_unit_head cu_header
;
2566 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2568 section
->buffer
+ to_underlying (sect_off
),
2571 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2572 struct signatured_type
);
2573 sig_type
->signature
= cu_header
.signature
;
2574 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2575 sig_type
->per_cu
.is_debug_types
= 1;
2576 sig_type
->per_cu
.section
= section
;
2577 sig_type
->per_cu
.sect_off
= sect_off
;
2578 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2579 sig_type
->per_cu
.v
.quick
2580 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2581 struct dwarf2_per_cu_quick_data
);
2583 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2586 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
2589 dwarf2_per_objfile
->signatured_types
= std::move (sig_types_hash
);
2592 /* Read the address map data from the mapped index, and use it to
2593 populate the objfile's psymtabs_addrmap. */
2596 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2597 struct mapped_index
*index
)
2599 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2600 struct gdbarch
*gdbarch
= objfile
->arch ();
2601 const gdb_byte
*iter
, *end
;
2602 struct addrmap
*mutable_map
;
2605 auto_obstack temp_obstack
;
2607 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2609 iter
= index
->address_table
.data ();
2610 end
= iter
+ index
->address_table
.size ();
2612 baseaddr
= objfile
->text_section_offset ();
2616 ULONGEST hi
, lo
, cu_index
;
2617 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2619 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2621 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2626 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2627 hex_string (lo
), hex_string (hi
));
2631 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
2633 complaint (_(".gdb_index address table has invalid CU number %u"),
2634 (unsigned) cu_index
);
2638 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2639 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2640 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2641 dwarf2_per_objfile
->get_cu (cu_index
));
2644 objfile
->partial_symtabs
->psymtabs_addrmap
2645 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2648 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2649 populate the objfile's psymtabs_addrmap. */
2652 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2653 struct dwarf2_section_info
*section
)
2655 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2656 bfd
*abfd
= objfile
->obfd
;
2657 struct gdbarch
*gdbarch
= objfile
->arch ();
2658 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2660 auto_obstack temp_obstack
;
2661 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2663 std::unordered_map
<sect_offset
,
2664 dwarf2_per_cu_data
*,
2665 gdb::hash_enum
<sect_offset
>>
2666 debug_info_offset_to_per_cu
;
2667 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
2669 const auto insertpair
2670 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2671 if (!insertpair
.second
)
2673 warning (_("Section .debug_aranges in %s has duplicate "
2674 "debug_info_offset %s, ignoring .debug_aranges."),
2675 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2680 section
->read (objfile
);
2682 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2684 const gdb_byte
*addr
= section
->buffer
;
2686 while (addr
< section
->buffer
+ section
->size
)
2688 const gdb_byte
*const entry_addr
= addr
;
2689 unsigned int bytes_read
;
2691 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2695 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2696 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2697 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2698 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2700 warning (_("Section .debug_aranges in %s entry at offset %s "
2701 "length %s exceeds section length %s, "
2702 "ignoring .debug_aranges."),
2703 objfile_name (objfile
),
2704 plongest (entry_addr
- section
->buffer
),
2705 plongest (bytes_read
+ entry_length
),
2706 pulongest (section
->size
));
2710 /* The version number. */
2711 const uint16_t version
= read_2_bytes (abfd
, addr
);
2715 warning (_("Section .debug_aranges in %s entry at offset %s "
2716 "has unsupported version %d, ignoring .debug_aranges."),
2717 objfile_name (objfile
),
2718 plongest (entry_addr
- section
->buffer
), version
);
2722 const uint64_t debug_info_offset
2723 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2724 addr
+= offset_size
;
2725 const auto per_cu_it
2726 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2727 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2729 warning (_("Section .debug_aranges in %s entry at offset %s "
2730 "debug_info_offset %s does not exists, "
2731 "ignoring .debug_aranges."),
2732 objfile_name (objfile
),
2733 plongest (entry_addr
- section
->buffer
),
2734 pulongest (debug_info_offset
));
2737 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2739 const uint8_t address_size
= *addr
++;
2740 if (address_size
< 1 || address_size
> 8)
2742 warning (_("Section .debug_aranges in %s entry at offset %s "
2743 "address_size %u is invalid, ignoring .debug_aranges."),
2744 objfile_name (objfile
),
2745 plongest (entry_addr
- section
->buffer
), address_size
);
2749 const uint8_t segment_selector_size
= *addr
++;
2750 if (segment_selector_size
!= 0)
2752 warning (_("Section .debug_aranges in %s entry at offset %s "
2753 "segment_selector_size %u is not supported, "
2754 "ignoring .debug_aranges."),
2755 objfile_name (objfile
),
2756 plongest (entry_addr
- section
->buffer
),
2757 segment_selector_size
);
2761 /* Must pad to an alignment boundary that is twice the address
2762 size. It is undocumented by the DWARF standard but GCC does
2764 for (size_t padding
= ((-(addr
- section
->buffer
))
2765 & (2 * address_size
- 1));
2766 padding
> 0; padding
--)
2769 warning (_("Section .debug_aranges in %s entry at offset %s "
2770 "padding is not zero, ignoring .debug_aranges."),
2771 objfile_name (objfile
),
2772 plongest (entry_addr
- section
->buffer
));
2778 if (addr
+ 2 * address_size
> entry_end
)
2780 warning (_("Section .debug_aranges in %s entry at offset %s "
2781 "address list is not properly terminated, "
2782 "ignoring .debug_aranges."),
2783 objfile_name (objfile
),
2784 plongest (entry_addr
- section
->buffer
));
2787 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2789 addr
+= address_size
;
2790 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2792 addr
+= address_size
;
2793 if (start
== 0 && length
== 0)
2795 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
2797 /* Symbol was eliminated due to a COMDAT group. */
2800 ULONGEST end
= start
+ length
;
2801 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2803 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2805 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2809 objfile
->partial_symtabs
->psymtabs_addrmap
2810 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2813 /* Find a slot in the mapped index INDEX for the object named NAME.
2814 If NAME is found, set *VEC_OUT to point to the CU vector in the
2815 constant pool and return true. If NAME cannot be found, return
2819 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2820 offset_type
**vec_out
)
2823 offset_type slot
, step
;
2824 int (*cmp
) (const char *, const char *);
2826 gdb::unique_xmalloc_ptr
<char> without_params
;
2827 if (current_language
->la_language
== language_cplus
2828 || current_language
->la_language
== language_fortran
2829 || current_language
->la_language
== language_d
)
2831 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2834 if (strchr (name
, '(') != NULL
)
2836 without_params
= cp_remove_params (name
);
2838 if (without_params
!= NULL
)
2839 name
= without_params
.get ();
2843 /* Index version 4 did not support case insensitive searches. But the
2844 indices for case insensitive languages are built in lowercase, therefore
2845 simulate our NAME being searched is also lowercased. */
2846 hash
= mapped_index_string_hash ((index
->version
== 4
2847 && case_sensitivity
== case_sensitive_off
2848 ? 5 : index
->version
),
2851 slot
= hash
& (index
->symbol_table
.size () - 1);
2852 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2853 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2859 const auto &bucket
= index
->symbol_table
[slot
];
2860 if (bucket
.name
== 0 && bucket
.vec
== 0)
2863 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2864 if (!cmp (name
, str
))
2866 *vec_out
= (offset_type
*) (index
->constant_pool
2867 + MAYBE_SWAP (bucket
.vec
));
2871 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2875 /* A helper function that reads the .gdb_index from BUFFER and fills
2876 in MAP. FILENAME is the name of the file containing the data;
2877 it is used for error reporting. DEPRECATED_OK is true if it is
2878 ok to use deprecated sections.
2880 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2881 out parameters that are filled in with information about the CU and
2882 TU lists in the section.
2884 Returns true if all went well, false otherwise. */
2887 read_gdb_index_from_buffer (const char *filename
,
2889 gdb::array_view
<const gdb_byte
> buffer
,
2890 struct mapped_index
*map
,
2891 const gdb_byte
**cu_list
,
2892 offset_type
*cu_list_elements
,
2893 const gdb_byte
**types_list
,
2894 offset_type
*types_list_elements
)
2896 const gdb_byte
*addr
= &buffer
[0];
2898 /* Version check. */
2899 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2900 /* Versions earlier than 3 emitted every copy of a psymbol. This
2901 causes the index to behave very poorly for certain requests. Version 3
2902 contained incomplete addrmap. So, it seems better to just ignore such
2906 static int warning_printed
= 0;
2907 if (!warning_printed
)
2909 warning (_("Skipping obsolete .gdb_index section in %s."),
2911 warning_printed
= 1;
2915 /* Index version 4 uses a different hash function than index version
2918 Versions earlier than 6 did not emit psymbols for inlined
2919 functions. Using these files will cause GDB not to be able to
2920 set breakpoints on inlined functions by name, so we ignore these
2921 indices unless the user has done
2922 "set use-deprecated-index-sections on". */
2923 if (version
< 6 && !deprecated_ok
)
2925 static int warning_printed
= 0;
2926 if (!warning_printed
)
2929 Skipping deprecated .gdb_index section in %s.\n\
2930 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2931 to use the section anyway."),
2933 warning_printed
= 1;
2937 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2938 of the TU (for symbols coming from TUs),
2939 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2940 Plus gold-generated indices can have duplicate entries for global symbols,
2941 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2942 These are just performance bugs, and we can't distinguish gdb-generated
2943 indices from gold-generated ones, so issue no warning here. */
2945 /* Indexes with higher version than the one supported by GDB may be no
2946 longer backward compatible. */
2950 map
->version
= version
;
2952 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2955 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2956 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2960 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2961 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2962 - MAYBE_SWAP (metadata
[i
]))
2966 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2967 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2969 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
2972 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2973 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
2975 = gdb::array_view
<mapped_index::symbol_table_slot
>
2976 ((mapped_index::symbol_table_slot
*) symbol_table
,
2977 (mapped_index::symbol_table_slot
*) symbol_table_end
);
2980 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
2985 /* Callback types for dwarf2_read_gdb_index. */
2987 typedef gdb::function_view
2988 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
2989 get_gdb_index_contents_ftype
;
2990 typedef gdb::function_view
2991 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
2992 get_gdb_index_contents_dwz_ftype
;
2994 /* Read .gdb_index. If everything went ok, initialize the "quick"
2995 elements of all the CUs and return 1. Otherwise, return 0. */
2998 dwarf2_read_gdb_index
2999 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3000 get_gdb_index_contents_ftype get_gdb_index_contents
,
3001 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3003 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3004 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3005 struct dwz_file
*dwz
;
3006 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3008 gdb::array_view
<const gdb_byte
> main_index_contents
3009 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3011 if (main_index_contents
.empty ())
3014 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3015 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3016 use_deprecated_index_sections
,
3017 main_index_contents
, map
.get (), &cu_list
,
3018 &cu_list_elements
, &types_list
,
3019 &types_list_elements
))
3022 /* Don't use the index if it's empty. */
3023 if (map
->symbol_table
.empty ())
3026 /* If there is a .dwz file, read it so we can get its CU list as
3028 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3031 struct mapped_index dwz_map
;
3032 const gdb_byte
*dwz_types_ignore
;
3033 offset_type dwz_types_elements_ignore
;
3035 gdb::array_view
<const gdb_byte
> dwz_index_content
3036 = get_gdb_index_contents_dwz (objfile
, dwz
);
3038 if (dwz_index_content
.empty ())
3041 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3042 1, dwz_index_content
, &dwz_map
,
3043 &dwz_list
, &dwz_list_elements
,
3045 &dwz_types_elements_ignore
))
3047 warning (_("could not read '.gdb_index' section from %s; skipping"),
3048 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3053 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3054 dwz_list
, dwz_list_elements
);
3056 if (types_list_elements
)
3058 /* We can only handle a single .debug_types when we have an
3060 if (dwarf2_per_objfile
->types
.size () != 1)
3063 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
3065 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3066 types_list
, types_list_elements
);
3069 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3071 dwarf2_per_objfile
->index_table
= std::move (map
);
3072 dwarf2_per_objfile
->using_index
= 1;
3073 dwarf2_per_objfile
->quick_file_names_table
=
3074 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3079 /* die_reader_func for dw2_get_file_names. */
3082 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3083 const gdb_byte
*info_ptr
,
3084 struct die_info
*comp_unit_die
)
3086 struct dwarf2_cu
*cu
= reader
->cu
;
3087 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3088 struct dwarf2_per_objfile
*dwarf2_per_objfile
3089 = cu
->per_cu
->dwarf2_per_objfile
;
3090 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3091 struct dwarf2_per_cu_data
*lh_cu
;
3092 struct attribute
*attr
;
3094 struct quick_file_names
*qfn
;
3096 gdb_assert (! this_cu
->is_debug_types
);
3098 /* Our callers never want to match partial units -- instead they
3099 will match the enclosing full CU. */
3100 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3102 this_cu
->v
.quick
->no_file_data
= 1;
3110 sect_offset line_offset
{};
3112 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3113 if (attr
!= nullptr)
3115 struct quick_file_names find_entry
;
3117 line_offset
= (sect_offset
) DW_UNSND (attr
);
3119 /* We may have already read in this line header (TU line header sharing).
3120 If we have we're done. */
3121 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3122 find_entry
.hash
.line_sect_off
= line_offset
;
3123 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
.get (),
3124 &find_entry
, INSERT
);
3127 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3131 lh
= dwarf_decode_line_header (line_offset
, cu
);
3135 lh_cu
->v
.quick
->no_file_data
= 1;
3139 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3140 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3141 qfn
->hash
.line_sect_off
= line_offset
;
3142 gdb_assert (slot
!= NULL
);
3145 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3148 if (strcmp (fnd
.name
, "<unknown>") != 0)
3151 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3153 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, qfn
->num_file_names
);
3155 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3156 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3157 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3158 fnd
.comp_dir
).release ();
3159 qfn
->real_names
= NULL
;
3161 lh_cu
->v
.quick
->file_names
= qfn
;
3164 /* A helper for the "quick" functions which attempts to read the line
3165 table for THIS_CU. */
3167 static struct quick_file_names
*
3168 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3170 /* This should never be called for TUs. */
3171 gdb_assert (! this_cu
->is_debug_types
);
3172 /* Nor type unit groups. */
3173 gdb_assert (! this_cu
->type_unit_group_p ());
3175 if (this_cu
->v
.quick
->file_names
!= NULL
)
3176 return this_cu
->v
.quick
->file_names
;
3177 /* If we know there is no line data, no point in looking again. */
3178 if (this_cu
->v
.quick
->no_file_data
)
3181 cutu_reader
reader (this_cu
);
3182 if (!reader
.dummy_p
)
3183 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3185 if (this_cu
->v
.quick
->no_file_data
)
3187 return this_cu
->v
.quick
->file_names
;
3190 /* A helper for the "quick" functions which computes and caches the
3191 real path for a given file name from the line table. */
3194 dw2_get_real_path (struct objfile
*objfile
,
3195 struct quick_file_names
*qfn
, int index
)
3197 if (qfn
->real_names
== NULL
)
3198 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3199 qfn
->num_file_names
, const char *);
3201 if (qfn
->real_names
[index
] == NULL
)
3202 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3204 return qfn
->real_names
[index
];
3207 static struct symtab
*
3208 dw2_find_last_source_symtab (struct objfile
*objfile
)
3210 struct dwarf2_per_objfile
*dwarf2_per_objfile
3211 = get_dwarf2_per_objfile (objfile
);
3212 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3213 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3218 return compunit_primary_filetab (cust
);
3221 /* Traversal function for dw2_forget_cached_source_info. */
3224 dw2_free_cached_file_names (void **slot
, void *info
)
3226 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3228 if (file_data
->real_names
)
3232 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3234 xfree ((void*) file_data
->real_names
[i
]);
3235 file_data
->real_names
[i
] = NULL
;
3243 dw2_forget_cached_source_info (struct objfile
*objfile
)
3245 struct dwarf2_per_objfile
*dwarf2_per_objfile
3246 = get_dwarf2_per_objfile (objfile
);
3248 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
.get (),
3249 dw2_free_cached_file_names
, NULL
);
3252 /* Helper function for dw2_map_symtabs_matching_filename that expands
3253 the symtabs and calls the iterator. */
3256 dw2_map_expand_apply (struct objfile
*objfile
,
3257 struct dwarf2_per_cu_data
*per_cu
,
3258 const char *name
, const char *real_path
,
3259 gdb::function_view
<bool (symtab
*)> callback
)
3261 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3263 /* Don't visit already-expanded CUs. */
3264 if (per_cu
->v
.quick
->compunit_symtab
)
3267 /* This may expand more than one symtab, and we want to iterate over
3269 dw2_instantiate_symtab (per_cu
, false);
3271 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3272 last_made
, callback
);
3275 /* Implementation of the map_symtabs_matching_filename method. */
3278 dw2_map_symtabs_matching_filename
3279 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3280 gdb::function_view
<bool (symtab
*)> callback
)
3282 const char *name_basename
= lbasename (name
);
3283 struct dwarf2_per_objfile
*dwarf2_per_objfile
3284 = get_dwarf2_per_objfile (objfile
);
3286 /* The rule is CUs specify all the files, including those used by
3287 any TU, so there's no need to scan TUs here. */
3289 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3291 /* We only need to look at symtabs not already expanded. */
3292 if (per_cu
->v
.quick
->compunit_symtab
)
3295 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3296 if (file_data
== NULL
)
3299 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3301 const char *this_name
= file_data
->file_names
[j
];
3302 const char *this_real_name
;
3304 if (compare_filenames_for_search (this_name
, name
))
3306 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3312 /* Before we invoke realpath, which can get expensive when many
3313 files are involved, do a quick comparison of the basenames. */
3314 if (! basenames_may_differ
3315 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3318 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3319 if (compare_filenames_for_search (this_real_name
, name
))
3321 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3327 if (real_path
!= NULL
)
3329 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3330 gdb_assert (IS_ABSOLUTE_PATH (name
));
3331 if (this_real_name
!= NULL
3332 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3334 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3346 /* Struct used to manage iterating over all CUs looking for a symbol. */
3348 struct dw2_symtab_iterator
3350 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3351 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3352 /* If set, only look for symbols that match that block. Valid values are
3353 GLOBAL_BLOCK and STATIC_BLOCK. */
3354 gdb::optional
<block_enum
> block_index
;
3355 /* The kind of symbol we're looking for. */
3357 /* The list of CUs from the index entry of the symbol,
3358 or NULL if not found. */
3360 /* The next element in VEC to look at. */
3362 /* The number of elements in VEC, or zero if there is no match. */
3364 /* Have we seen a global version of the symbol?
3365 If so we can ignore all further global instances.
3366 This is to work around gold/15646, inefficient gold-generated
3371 /* Initialize the index symtab iterator ITER. */
3374 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3375 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3376 gdb::optional
<block_enum
> block_index
,
3380 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3381 iter
->block_index
= block_index
;
3382 iter
->domain
= domain
;
3384 iter
->global_seen
= 0;
3386 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3388 /* index is NULL if OBJF_READNOW. */
3389 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3390 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3398 /* Return the next matching CU or NULL if there are no more. */
3400 static struct dwarf2_per_cu_data
*
3401 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3403 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3405 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3407 offset_type cu_index_and_attrs
=
3408 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3409 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3410 gdb_index_symbol_kind symbol_kind
=
3411 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3412 /* Only check the symbol attributes if they're present.
3413 Indices prior to version 7 don't record them,
3414 and indices >= 7 may elide them for certain symbols
3415 (gold does this). */
3417 (dwarf2_per_objfile
->index_table
->version
>= 7
3418 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3420 /* Don't crash on bad data. */
3421 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3422 + dwarf2_per_objfile
->all_type_units
.size ()))
3424 complaint (_(".gdb_index entry has bad CU index"
3426 objfile_name (dwarf2_per_objfile
->objfile
));
3430 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3432 /* Skip if already read in. */
3433 if (per_cu
->v
.quick
->compunit_symtab
)
3436 /* Check static vs global. */
3439 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3441 if (iter
->block_index
.has_value ())
3443 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3445 if (is_static
!= want_static
)
3449 /* Work around gold/15646. */
3450 if (!is_static
&& iter
->global_seen
)
3453 iter
->global_seen
= 1;
3456 /* Only check the symbol's kind if it has one. */
3459 switch (iter
->domain
)
3462 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3463 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3464 /* Some types are also in VAR_DOMAIN. */
3465 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3469 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3473 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3477 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3492 static struct compunit_symtab
*
3493 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3494 const char *name
, domain_enum domain
)
3496 struct compunit_symtab
*stab_best
= NULL
;
3497 struct dwarf2_per_objfile
*dwarf2_per_objfile
3498 = get_dwarf2_per_objfile (objfile
);
3500 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3502 struct dw2_symtab_iterator iter
;
3503 struct dwarf2_per_cu_data
*per_cu
;
3505 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3507 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3509 struct symbol
*sym
, *with_opaque
= NULL
;
3510 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
3511 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3512 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3514 sym
= block_find_symbol (block
, name
, domain
,
3515 block_find_non_opaque_type_preferred
,
3518 /* Some caution must be observed with overloaded functions
3519 and methods, since the index will not contain any overload
3520 information (but NAME might contain it). */
3523 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3525 if (with_opaque
!= NULL
3526 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3529 /* Keep looking through other CUs. */
3536 dw2_print_stats (struct objfile
*objfile
)
3538 struct dwarf2_per_objfile
*dwarf2_per_objfile
3539 = get_dwarf2_per_objfile (objfile
);
3540 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
3541 + dwarf2_per_objfile
->all_type_units
.size ());
3544 for (int i
= 0; i
< total
; ++i
)
3546 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3548 if (!per_cu
->v
.quick
->compunit_symtab
)
3551 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3552 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3555 /* This dumps minimal information about the index.
3556 It is called via "mt print objfiles".
3557 One use is to verify .gdb_index has been loaded by the
3558 gdb.dwarf2/gdb-index.exp testcase. */
3561 dw2_dump (struct objfile
*objfile
)
3563 struct dwarf2_per_objfile
*dwarf2_per_objfile
3564 = get_dwarf2_per_objfile (objfile
);
3566 gdb_assert (dwarf2_per_objfile
->using_index
);
3567 printf_filtered (".gdb_index:");
3568 if (dwarf2_per_objfile
->index_table
!= NULL
)
3570 printf_filtered (" version %d\n",
3571 dwarf2_per_objfile
->index_table
->version
);
3574 printf_filtered (" faked for \"readnow\"\n");
3575 printf_filtered ("\n");
3579 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3580 const char *func_name
)
3582 struct dwarf2_per_objfile
*dwarf2_per_objfile
3583 = get_dwarf2_per_objfile (objfile
);
3585 struct dw2_symtab_iterator iter
;
3586 struct dwarf2_per_cu_data
*per_cu
;
3588 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3590 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3591 dw2_instantiate_symtab (per_cu
, false);
3596 dw2_expand_all_symtabs (struct objfile
*objfile
)
3598 struct dwarf2_per_objfile
*dwarf2_per_objfile
3599 = get_dwarf2_per_objfile (objfile
);
3600 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
3601 + dwarf2_per_objfile
->all_type_units
.size ());
3603 for (int i
= 0; i
< total_units
; ++i
)
3605 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
3607 /* We don't want to directly expand a partial CU, because if we
3608 read it with the wrong language, then assertion failures can
3609 be triggered later on. See PR symtab/23010. So, tell
3610 dw2_instantiate_symtab to skip partial CUs -- any important
3611 partial CU will be read via DW_TAG_imported_unit anyway. */
3612 dw2_instantiate_symtab (per_cu
, true);
3617 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3618 const char *fullname
)
3620 struct dwarf2_per_objfile
*dwarf2_per_objfile
3621 = get_dwarf2_per_objfile (objfile
);
3623 /* We don't need to consider type units here.
3624 This is only called for examining code, e.g. expand_line_sal.
3625 There can be an order of magnitude (or more) more type units
3626 than comp units, and we avoid them if we can. */
3628 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3630 /* We only need to look at symtabs not already expanded. */
3631 if (per_cu
->v
.quick
->compunit_symtab
)
3634 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3635 if (file_data
== NULL
)
3638 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3640 const char *this_fullname
= file_data
->file_names
[j
];
3642 if (filename_cmp (this_fullname
, fullname
) == 0)
3644 dw2_instantiate_symtab (per_cu
, false);
3652 dw2_map_matching_symbols
3653 (struct objfile
*objfile
,
3654 const lookup_name_info
&name
, domain_enum domain
,
3656 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3657 symbol_compare_ftype
*ordered_compare
)
3660 struct dwarf2_per_objfile
*dwarf2_per_objfile
3661 = get_dwarf2_per_objfile (objfile
);
3663 if (dwarf2_per_objfile
->index_table
!= nullptr)
3665 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3666 here though if the current language is Ada for a non-Ada objfile
3667 using GNU index. As Ada does not look for non-Ada symbols this
3668 function should just return. */
3672 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3673 inline psym_map_matching_symbols here, assuming all partial symtabs have
3675 const int block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3677 for (compunit_symtab
*cust
: objfile
->compunits ())
3679 const struct block
*block
;
3683 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3684 if (!iterate_over_symbols_terminated (block
, name
,
3690 /* Starting from a search name, return the string that finds the upper
3691 bound of all strings that start with SEARCH_NAME in a sorted name
3692 list. Returns the empty string to indicate that the upper bound is
3693 the end of the list. */
3696 make_sort_after_prefix_name (const char *search_name
)
3698 /* When looking to complete "func", we find the upper bound of all
3699 symbols that start with "func" by looking for where we'd insert
3700 the closest string that would follow "func" in lexicographical
3701 order. Usually, that's "func"-with-last-character-incremented,
3702 i.e. "fund". Mind non-ASCII characters, though. Usually those
3703 will be UTF-8 multi-byte sequences, but we can't be certain.
3704 Especially mind the 0xff character, which is a valid character in
3705 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3706 rule out compilers allowing it in identifiers. Note that
3707 conveniently, strcmp/strcasecmp are specified to compare
3708 characters interpreted as unsigned char. So what we do is treat
3709 the whole string as a base 256 number composed of a sequence of
3710 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3711 to 0, and carries 1 to the following more-significant position.
3712 If the very first character in SEARCH_NAME ends up incremented
3713 and carries/overflows, then the upper bound is the end of the
3714 list. The string after the empty string is also the empty
3717 Some examples of this operation:
3719 SEARCH_NAME => "+1" RESULT
3723 "\xff" "a" "\xff" => "\xff" "b"
3728 Then, with these symbols for example:
3734 completing "func" looks for symbols between "func" and
3735 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3736 which finds "func" and "func1", but not "fund".
3740 funcÿ (Latin1 'ÿ' [0xff])
3744 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3745 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3749 ÿÿ (Latin1 'ÿ' [0xff])
3752 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3753 the end of the list.
3755 std::string after
= search_name
;
3756 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3758 if (!after
.empty ())
3759 after
.back () = (unsigned char) after
.back () + 1;
3763 /* See declaration. */
3765 std::pair
<std::vector
<name_component
>::const_iterator
,
3766 std::vector
<name_component
>::const_iterator
>
3767 mapped_index_base::find_name_components_bounds
3768 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3771 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3773 const char *lang_name
3774 = lookup_name_without_params
.language_lookup_name (lang
);
3776 /* Comparison function object for lower_bound that matches against a
3777 given symbol name. */
3778 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3781 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3782 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3783 return name_cmp (elem_name
, name
) < 0;
3786 /* Comparison function object for upper_bound that matches against a
3787 given symbol name. */
3788 auto lookup_compare_upper
= [&] (const char *name
,
3789 const name_component
&elem
)
3791 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3792 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3793 return name_cmp (name
, elem_name
) < 0;
3796 auto begin
= this->name_components
.begin ();
3797 auto end
= this->name_components
.end ();
3799 /* Find the lower bound. */
3802 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3805 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3808 /* Find the upper bound. */
3811 if (lookup_name_without_params
.completion_mode ())
3813 /* In completion mode, we want UPPER to point past all
3814 symbols names that have the same prefix. I.e., with
3815 these symbols, and completing "func":
3817 function << lower bound
3819 other_function << upper bound
3821 We find the upper bound by looking for the insertion
3822 point of "func"-with-last-character-incremented,
3824 std::string after
= make_sort_after_prefix_name (lang_name
);
3827 return std::lower_bound (lower
, end
, after
.c_str (),
3828 lookup_compare_lower
);
3831 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3834 return {lower
, upper
};
3837 /* See declaration. */
3840 mapped_index_base::build_name_components ()
3842 if (!this->name_components
.empty ())
3845 this->name_components_casing
= case_sensitivity
;
3847 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3849 /* The code below only knows how to break apart components of C++
3850 symbol names (and other languages that use '::' as
3851 namespace/module separator) and Ada symbol names. */
3852 auto count
= this->symbol_name_count ();
3853 for (offset_type idx
= 0; idx
< count
; idx
++)
3855 if (this->symbol_name_slot_invalid (idx
))
3858 const char *name
= this->symbol_name_at (idx
);
3860 /* Add each name component to the name component table. */
3861 unsigned int previous_len
= 0;
3863 if (strstr (name
, "::") != nullptr)
3865 for (unsigned int current_len
= cp_find_first_component (name
);
3866 name
[current_len
] != '\0';
3867 current_len
+= cp_find_first_component (name
+ current_len
))
3869 gdb_assert (name
[current_len
] == ':');
3870 this->name_components
.push_back ({previous_len
, idx
});
3871 /* Skip the '::'. */
3873 previous_len
= current_len
;
3878 /* Handle the Ada encoded (aka mangled) form here. */
3879 for (const char *iter
= strstr (name
, "__");
3881 iter
= strstr (iter
, "__"))
3883 this->name_components
.push_back ({previous_len
, idx
});
3885 previous_len
= iter
- name
;
3889 this->name_components
.push_back ({previous_len
, idx
});
3892 /* Sort name_components elements by name. */
3893 auto name_comp_compare
= [&] (const name_component
&left
,
3894 const name_component
&right
)
3896 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3897 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3899 const char *left_name
= left_qualified
+ left
.name_offset
;
3900 const char *right_name
= right_qualified
+ right
.name_offset
;
3902 return name_cmp (left_name
, right_name
) < 0;
3905 std::sort (this->name_components
.begin (),
3906 this->name_components
.end (),
3910 /* Helper for dw2_expand_symtabs_matching that works with a
3911 mapped_index_base instead of the containing objfile. This is split
3912 to a separate function in order to be able to unit test the
3913 name_components matching using a mock mapped_index_base. For each
3914 symbol name that matches, calls MATCH_CALLBACK, passing it the
3915 symbol's index in the mapped_index_base symbol table. */
3918 dw2_expand_symtabs_matching_symbol
3919 (mapped_index_base
&index
,
3920 const lookup_name_info
&lookup_name_in
,
3921 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3922 enum search_domain kind
,
3923 gdb::function_view
<bool (offset_type
)> match_callback
)
3925 lookup_name_info lookup_name_without_params
3926 = lookup_name_in
.make_ignore_params ();
3928 /* Build the symbol name component sorted vector, if we haven't
3930 index
.build_name_components ();
3932 /* The same symbol may appear more than once in the range though.
3933 E.g., if we're looking for symbols that complete "w", and we have
3934 a symbol named "w1::w2", we'll find the two name components for
3935 that same symbol in the range. To be sure we only call the
3936 callback once per symbol, we first collect the symbol name
3937 indexes that matched in a temporary vector and ignore
3939 std::vector
<offset_type
> matches
;
3941 struct name_and_matcher
3943 symbol_name_matcher_ftype
*matcher
;
3946 bool operator== (const name_and_matcher
&other
) const
3948 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
3952 /* A vector holding all the different symbol name matchers, for all
3954 std::vector
<name_and_matcher
> matchers
;
3956 for (int i
= 0; i
< nr_languages
; i
++)
3958 enum language lang_e
= (enum language
) i
;
3960 const language_defn
*lang
= language_def (lang_e
);
3961 symbol_name_matcher_ftype
*name_matcher
3962 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
3964 name_and_matcher key
{
3966 lookup_name_without_params
.language_lookup_name (lang_e
)
3969 /* Don't insert the same comparison routine more than once.
3970 Note that we do this linear walk. This is not a problem in
3971 practice because the number of supported languages is
3973 if (std::find (matchers
.begin (), matchers
.end (), key
)
3976 matchers
.push_back (std::move (key
));
3979 = index
.find_name_components_bounds (lookup_name_without_params
,
3982 /* Now for each symbol name in range, check to see if we have a name
3983 match, and if so, call the MATCH_CALLBACK callback. */
3985 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
3987 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
3989 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
3990 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
3993 matches
.push_back (bounds
.first
->idx
);
3997 std::sort (matches
.begin (), matches
.end ());
3999 /* Finally call the callback, once per match. */
4001 for (offset_type idx
: matches
)
4005 if (!match_callback (idx
))
4011 /* Above we use a type wider than idx's for 'prev', since 0 and
4012 (offset_type)-1 are both possible values. */
4013 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4018 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4020 /* A mock .gdb_index/.debug_names-like name index table, enough to
4021 exercise dw2_expand_symtabs_matching_symbol, which works with the
4022 mapped_index_base interface. Builds an index from the symbol list
4023 passed as parameter to the constructor. */
4024 class mock_mapped_index
: public mapped_index_base
4027 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4028 : m_symbol_table (symbols
)
4031 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4033 /* Return the number of names in the symbol table. */
4034 size_t symbol_name_count () const override
4036 return m_symbol_table
.size ();
4039 /* Get the name of the symbol at IDX in the symbol table. */
4040 const char *symbol_name_at (offset_type idx
) const override
4042 return m_symbol_table
[idx
];
4046 gdb::array_view
<const char *> m_symbol_table
;
4049 /* Convenience function that converts a NULL pointer to a "<null>"
4050 string, to pass to print routines. */
4053 string_or_null (const char *str
)
4055 return str
!= NULL
? str
: "<null>";
4058 /* Check if a lookup_name_info built from
4059 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4060 index. EXPECTED_LIST is the list of expected matches, in expected
4061 matching order. If no match expected, then an empty list is
4062 specified. Returns true on success. On failure prints a warning
4063 indicating the file:line that failed, and returns false. */
4066 check_match (const char *file
, int line
,
4067 mock_mapped_index
&mock_index
,
4068 const char *name
, symbol_name_match_type match_type
,
4069 bool completion_mode
,
4070 std::initializer_list
<const char *> expected_list
)
4072 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4074 bool matched
= true;
4076 auto mismatch
= [&] (const char *expected_str
,
4079 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4080 "expected=\"%s\", got=\"%s\"\n"),
4082 (match_type
== symbol_name_match_type::FULL
4084 name
, string_or_null (expected_str
), string_or_null (got
));
4088 auto expected_it
= expected_list
.begin ();
4089 auto expected_end
= expected_list
.end ();
4091 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4093 [&] (offset_type idx
)
4095 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4096 const char *expected_str
4097 = expected_it
== expected_end
? NULL
: *expected_it
++;
4099 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4100 mismatch (expected_str
, matched_name
);
4104 const char *expected_str
4105 = expected_it
== expected_end
? NULL
: *expected_it
++;
4106 if (expected_str
!= NULL
)
4107 mismatch (expected_str
, NULL
);
4112 /* The symbols added to the mock mapped_index for testing (in
4114 static const char *test_symbols
[] = {
4123 "ns2::tmpl<int>::foo2",
4124 "(anonymous namespace)::A::B::C",
4126 /* These are used to check that the increment-last-char in the
4127 matching algorithm for completion doesn't match "t1_fund" when
4128 completing "t1_func". */
4134 /* A UTF-8 name with multi-byte sequences to make sure that
4135 cp-name-parser understands this as a single identifier ("função"
4136 is "function" in PT). */
4139 /* \377 (0xff) is Latin1 'ÿ'. */
4142 /* \377 (0xff) is Latin1 'ÿ'. */
4146 /* A name with all sorts of complications. Starts with "z" to make
4147 it easier for the completion tests below. */
4148 #define Z_SYM_NAME \
4149 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4150 "::tuple<(anonymous namespace)::ui*, " \
4151 "std::default_delete<(anonymous namespace)::ui>, void>"
4156 /* Returns true if the mapped_index_base::find_name_component_bounds
4157 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4158 in completion mode. */
4161 check_find_bounds_finds (mapped_index_base
&index
,
4162 const char *search_name
,
4163 gdb::array_view
<const char *> expected_syms
)
4165 lookup_name_info
lookup_name (search_name
,
4166 symbol_name_match_type::FULL
, true);
4168 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4171 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4172 if (distance
!= expected_syms
.size ())
4175 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4177 auto nc_elem
= bounds
.first
+ exp_elem
;
4178 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4179 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4186 /* Test the lower-level mapped_index::find_name_component_bounds
4190 test_mapped_index_find_name_component_bounds ()
4192 mock_mapped_index
mock_index (test_symbols
);
4194 mock_index
.build_name_components ();
4196 /* Test the lower-level mapped_index::find_name_component_bounds
4197 method in completion mode. */
4199 static const char *expected_syms
[] = {
4204 SELF_CHECK (check_find_bounds_finds (mock_index
,
4205 "t1_func", expected_syms
));
4208 /* Check that the increment-last-char in the name matching algorithm
4209 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4211 static const char *expected_syms1
[] = {
4215 SELF_CHECK (check_find_bounds_finds (mock_index
,
4216 "\377", expected_syms1
));
4218 static const char *expected_syms2
[] = {
4221 SELF_CHECK (check_find_bounds_finds (mock_index
,
4222 "\377\377", expected_syms2
));
4226 /* Test dw2_expand_symtabs_matching_symbol. */
4229 test_dw2_expand_symtabs_matching_symbol ()
4231 mock_mapped_index
mock_index (test_symbols
);
4233 /* We let all tests run until the end even if some fails, for debug
4235 bool any_mismatch
= false;
4237 /* Create the expected symbols list (an initializer_list). Needed
4238 because lists have commas, and we need to pass them to CHECK,
4239 which is a macro. */
4240 #define EXPECT(...) { __VA_ARGS__ }
4242 /* Wrapper for check_match that passes down the current
4243 __FILE__/__LINE__. */
4244 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4245 any_mismatch |= !check_match (__FILE__, __LINE__, \
4247 NAME, MATCH_TYPE, COMPLETION_MODE, \
4250 /* Identity checks. */
4251 for (const char *sym
: test_symbols
)
4253 /* Should be able to match all existing symbols. */
4254 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4257 /* Should be able to match all existing symbols with
4259 std::string with_params
= std::string (sym
) + "(int)";
4260 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4263 /* Should be able to match all existing symbols with
4264 parameters and qualifiers. */
4265 with_params
= std::string (sym
) + " ( int ) const";
4266 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4269 /* This should really find sym, but cp-name-parser.y doesn't
4270 know about lvalue/rvalue qualifiers yet. */
4271 with_params
= std::string (sym
) + " ( int ) &&";
4272 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4276 /* Check that the name matching algorithm for completion doesn't get
4277 confused with Latin1 'ÿ' / 0xff. */
4279 static const char str
[] = "\377";
4280 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4281 EXPECT ("\377", "\377\377123"));
4284 /* Check that the increment-last-char in the matching algorithm for
4285 completion doesn't match "t1_fund" when completing "t1_func". */
4287 static const char str
[] = "t1_func";
4288 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4289 EXPECT ("t1_func", "t1_func1"));
4292 /* Check that completion mode works at each prefix of the expected
4295 static const char str
[] = "function(int)";
4296 size_t len
= strlen (str
);
4299 for (size_t i
= 1; i
< len
; i
++)
4301 lookup
.assign (str
, i
);
4302 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4303 EXPECT ("function"));
4307 /* While "w" is a prefix of both components, the match function
4308 should still only be called once. */
4310 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4312 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4316 /* Same, with a "complicated" symbol. */
4318 static const char str
[] = Z_SYM_NAME
;
4319 size_t len
= strlen (str
);
4322 for (size_t i
= 1; i
< len
; i
++)
4324 lookup
.assign (str
, i
);
4325 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4326 EXPECT (Z_SYM_NAME
));
4330 /* In FULL mode, an incomplete symbol doesn't match. */
4332 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4336 /* A complete symbol with parameters matches any overload, since the
4337 index has no overload info. */
4339 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4340 EXPECT ("std::zfunction", "std::zfunction2"));
4341 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4342 EXPECT ("std::zfunction", "std::zfunction2"));
4343 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4344 EXPECT ("std::zfunction", "std::zfunction2"));
4347 /* Check that whitespace is ignored appropriately. A symbol with a
4348 template argument list. */
4350 static const char expected
[] = "ns::foo<int>";
4351 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4353 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4357 /* Check that whitespace is ignored appropriately. A symbol with a
4358 template argument list that includes a pointer. */
4360 static const char expected
[] = "ns::foo<char*>";
4361 /* Try both completion and non-completion modes. */
4362 static const bool completion_mode
[2] = {false, true};
4363 for (size_t i
= 0; i
< 2; i
++)
4365 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4366 completion_mode
[i
], EXPECT (expected
));
4367 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4368 completion_mode
[i
], EXPECT (expected
));
4370 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4371 completion_mode
[i
], EXPECT (expected
));
4372 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4373 completion_mode
[i
], EXPECT (expected
));
4378 /* Check method qualifiers are ignored. */
4379 static const char expected
[] = "ns::foo<char*>";
4380 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4381 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4382 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4383 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4384 CHECK_MATCH ("foo < char * > ( int ) const",
4385 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4386 CHECK_MATCH ("foo < char * > ( int ) &&",
4387 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4390 /* Test lookup names that don't match anything. */
4392 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4395 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4399 /* Some wild matching tests, exercising "(anonymous namespace)",
4400 which should not be confused with a parameter list. */
4402 static const char *syms
[] = {
4406 "A :: B :: C ( int )",
4411 for (const char *s
: syms
)
4413 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4414 EXPECT ("(anonymous namespace)::A::B::C"));
4419 static const char expected
[] = "ns2::tmpl<int>::foo2";
4420 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4422 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4426 SELF_CHECK (!any_mismatch
);
4435 test_mapped_index_find_name_component_bounds ();
4436 test_dw2_expand_symtabs_matching_symbol ();
4439 }} // namespace selftests::dw2_expand_symtabs_matching
4441 #endif /* GDB_SELF_TEST */
4443 /* If FILE_MATCHER is NULL or if PER_CU has
4444 dwarf2_per_cu_quick_data::MARK set (see
4445 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4446 EXPANSION_NOTIFY on it. */
4449 dw2_expand_symtabs_matching_one
4450 (struct dwarf2_per_cu_data
*per_cu
,
4451 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4452 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4454 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4456 bool symtab_was_null
4457 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4459 dw2_instantiate_symtab (per_cu
, false);
4461 if (expansion_notify
!= NULL
4463 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4464 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4468 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4469 matched, to expand corresponding CUs that were marked. IDX is the
4470 index of the symbol name that matched. */
4473 dw2_expand_marked_cus
4474 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4475 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4476 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4479 offset_type
*vec
, vec_len
, vec_idx
;
4480 bool global_seen
= false;
4481 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4483 vec
= (offset_type
*) (index
.constant_pool
4484 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4485 vec_len
= MAYBE_SWAP (vec
[0]);
4486 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4488 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4489 /* This value is only valid for index versions >= 7. */
4490 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4491 gdb_index_symbol_kind symbol_kind
=
4492 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4493 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4494 /* Only check the symbol attributes if they're present.
4495 Indices prior to version 7 don't record them,
4496 and indices >= 7 may elide them for certain symbols
4497 (gold does this). */
4500 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4502 /* Work around gold/15646. */
4505 if (!is_static
&& global_seen
)
4511 /* Only check the symbol's kind if it has one. */
4516 case VARIABLES_DOMAIN
:
4517 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4520 case FUNCTIONS_DOMAIN
:
4521 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4525 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4528 case MODULES_DOMAIN
:
4529 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4537 /* Don't crash on bad data. */
4538 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4539 + dwarf2_per_objfile
->all_type_units
.size ()))
4541 complaint (_(".gdb_index entry has bad CU index"
4543 objfile_name (dwarf2_per_objfile
->objfile
));
4547 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4548 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4553 /* If FILE_MATCHER is non-NULL, set all the
4554 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4555 that match FILE_MATCHER. */
4558 dw_expand_symtabs_matching_file_matcher
4559 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4560 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4562 if (file_matcher
== NULL
)
4565 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
4567 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4569 NULL
, xcalloc
, xfree
));
4570 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4572 NULL
, xcalloc
, xfree
));
4574 /* The rule is CUs specify all the files, including those used by
4575 any TU, so there's no need to scan TUs here. */
4577 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4581 per_cu
->v
.quick
->mark
= 0;
4583 /* We only need to look at symtabs not already expanded. */
4584 if (per_cu
->v
.quick
->compunit_symtab
)
4587 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4588 if (file_data
== NULL
)
4591 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4593 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4595 per_cu
->v
.quick
->mark
= 1;
4599 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4601 const char *this_real_name
;
4603 if (file_matcher (file_data
->file_names
[j
], false))
4605 per_cu
->v
.quick
->mark
= 1;
4609 /* Before we invoke realpath, which can get expensive when many
4610 files are involved, do a quick comparison of the basenames. */
4611 if (!basenames_may_differ
4612 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4616 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4617 if (file_matcher (this_real_name
, false))
4619 per_cu
->v
.quick
->mark
= 1;
4624 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4625 ? visited_found
.get ()
4626 : visited_not_found
.get (),
4633 dw2_expand_symtabs_matching
4634 (struct objfile
*objfile
,
4635 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4636 const lookup_name_info
*lookup_name
,
4637 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4638 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4639 enum search_domain kind
)
4641 struct dwarf2_per_objfile
*dwarf2_per_objfile
4642 = get_dwarf2_per_objfile (objfile
);
4644 /* index_table is NULL if OBJF_READNOW. */
4645 if (!dwarf2_per_objfile
->index_table
)
4648 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4650 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4652 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4656 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
4662 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4664 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4666 kind
, [&] (offset_type idx
)
4668 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4669 expansion_notify
, kind
);
4674 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4677 static struct compunit_symtab
*
4678 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4683 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4684 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4687 if (cust
->includes
== NULL
)
4690 for (i
= 0; cust
->includes
[i
]; ++i
)
4692 struct compunit_symtab
*s
= cust
->includes
[i
];
4694 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4702 static struct compunit_symtab
*
4703 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4704 struct bound_minimal_symbol msymbol
,
4706 struct obj_section
*section
,
4709 struct dwarf2_per_cu_data
*data
;
4710 struct compunit_symtab
*result
;
4712 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4715 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4716 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4717 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4721 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4722 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4723 paddress (objfile
->arch (), pc
));
4726 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
4729 gdb_assert (result
!= NULL
);
4734 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4735 void *data
, int need_fullname
)
4737 struct dwarf2_per_objfile
*dwarf2_per_objfile
4738 = get_dwarf2_per_objfile (objfile
);
4740 if (!dwarf2_per_objfile
->filenames_cache
)
4742 dwarf2_per_objfile
->filenames_cache
.emplace ();
4744 htab_up
visited (htab_create_alloc (10,
4745 htab_hash_pointer
, htab_eq_pointer
,
4746 NULL
, xcalloc
, xfree
));
4748 /* The rule is CUs specify all the files, including those used
4749 by any TU, so there's no need to scan TUs here. We can
4750 ignore file names coming from already-expanded CUs. */
4752 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4754 if (per_cu
->v
.quick
->compunit_symtab
)
4756 void **slot
= htab_find_slot (visited
.get (),
4757 per_cu
->v
.quick
->file_names
,
4760 *slot
= per_cu
->v
.quick
->file_names
;
4764 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4766 /* We only need to look at symtabs not already expanded. */
4767 if (per_cu
->v
.quick
->compunit_symtab
)
4770 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4771 if (file_data
== NULL
)
4774 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4777 /* Already visited. */
4782 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4784 const char *filename
= file_data
->file_names
[j
];
4785 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4790 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4792 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4795 this_real_name
= gdb_realpath (filename
);
4796 (*fun
) (filename
, this_real_name
.get (), data
);
4801 dw2_has_symbols (struct objfile
*objfile
)
4806 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4809 dw2_find_last_source_symtab
,
4810 dw2_forget_cached_source_info
,
4811 dw2_map_symtabs_matching_filename
,
4816 dw2_expand_symtabs_for_function
,
4817 dw2_expand_all_symtabs
,
4818 dw2_expand_symtabs_with_fullname
,
4819 dw2_map_matching_symbols
,
4820 dw2_expand_symtabs_matching
,
4821 dw2_find_pc_sect_compunit_symtab
,
4823 dw2_map_symbol_filenames
4826 /* DWARF-5 debug_names reader. */
4828 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4829 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4831 /* A helper function that reads the .debug_names section in SECTION
4832 and fills in MAP. FILENAME is the name of the file containing the
4833 section; it is used for error reporting.
4835 Returns true if all went well, false otherwise. */
4838 read_debug_names_from_section (struct objfile
*objfile
,
4839 const char *filename
,
4840 struct dwarf2_section_info
*section
,
4841 mapped_debug_names
&map
)
4843 if (section
->empty ())
4846 /* Older elfutils strip versions could keep the section in the main
4847 executable while splitting it for the separate debug info file. */
4848 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4851 section
->read (objfile
);
4853 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4855 const gdb_byte
*addr
= section
->buffer
;
4857 bfd
*const abfd
= section
->get_bfd_owner ();
4859 unsigned int bytes_read
;
4860 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4863 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4864 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4865 if (bytes_read
+ length
!= section
->size
)
4867 /* There may be multiple per-CU indices. */
4868 warning (_("Section .debug_names in %s length %s does not match "
4869 "section length %s, ignoring .debug_names."),
4870 filename
, plongest (bytes_read
+ length
),
4871 pulongest (section
->size
));
4875 /* The version number. */
4876 uint16_t version
= read_2_bytes (abfd
, addr
);
4880 warning (_("Section .debug_names in %s has unsupported version %d, "
4881 "ignoring .debug_names."),
4887 uint16_t padding
= read_2_bytes (abfd
, addr
);
4891 warning (_("Section .debug_names in %s has unsupported padding %d, "
4892 "ignoring .debug_names."),
4897 /* comp_unit_count - The number of CUs in the CU list. */
4898 map
.cu_count
= read_4_bytes (abfd
, addr
);
4901 /* local_type_unit_count - The number of TUs in the local TU
4903 map
.tu_count
= read_4_bytes (abfd
, addr
);
4906 /* foreign_type_unit_count - The number of TUs in the foreign TU
4908 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
4910 if (foreign_tu_count
!= 0)
4912 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
4913 "ignoring .debug_names."),
4914 filename
, static_cast<unsigned long> (foreign_tu_count
));
4918 /* bucket_count - The number of hash buckets in the hash lookup
4920 map
.bucket_count
= read_4_bytes (abfd
, addr
);
4923 /* name_count - The number of unique names in the index. */
4924 map
.name_count
= read_4_bytes (abfd
, addr
);
4927 /* abbrev_table_size - The size in bytes of the abbreviations
4929 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
4932 /* augmentation_string_size - The size in bytes of the augmentation
4933 string. This value is rounded up to a multiple of 4. */
4934 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
4936 map
.augmentation_is_gdb
= ((augmentation_string_size
4937 == sizeof (dwarf5_augmentation
))
4938 && memcmp (addr
, dwarf5_augmentation
,
4939 sizeof (dwarf5_augmentation
)) == 0);
4940 augmentation_string_size
+= (-augmentation_string_size
) & 3;
4941 addr
+= augmentation_string_size
;
4944 map
.cu_table_reordered
= addr
;
4945 addr
+= map
.cu_count
* map
.offset_size
;
4947 /* List of Local TUs */
4948 map
.tu_table_reordered
= addr
;
4949 addr
+= map
.tu_count
* map
.offset_size
;
4951 /* Hash Lookup Table */
4952 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4953 addr
+= map
.bucket_count
* 4;
4954 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
4955 addr
+= map
.name_count
* 4;
4958 map
.name_table_string_offs_reordered
= addr
;
4959 addr
+= map
.name_count
* map
.offset_size
;
4960 map
.name_table_entry_offs_reordered
= addr
;
4961 addr
+= map
.name_count
* map
.offset_size
;
4963 const gdb_byte
*abbrev_table_start
= addr
;
4966 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4971 const auto insertpair
4972 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
4973 if (!insertpair
.second
)
4975 warning (_("Section .debug_names in %s has duplicate index %s, "
4976 "ignoring .debug_names."),
4977 filename
, pulongest (index_num
));
4980 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
4981 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4986 mapped_debug_names::index_val::attr attr
;
4987 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4989 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
4991 if (attr
.form
== DW_FORM_implicit_const
)
4993 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
4997 if (attr
.dw_idx
== 0 && attr
.form
== 0)
4999 indexval
.attr_vec
.push_back (std::move (attr
));
5002 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5004 warning (_("Section .debug_names in %s has abbreviation_table "
5005 "of size %s vs. written as %u, ignoring .debug_names."),
5006 filename
, plongest (addr
- abbrev_table_start
),
5010 map
.entry_pool
= addr
;
5015 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5019 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5020 const mapped_debug_names
&map
,
5021 dwarf2_section_info
§ion
,
5024 sect_offset sect_off_prev
;
5025 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5027 sect_offset sect_off_next
;
5028 if (i
< map
.cu_count
)
5031 = (sect_offset
) (extract_unsigned_integer
5032 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5034 map
.dwarf5_byte_order
));
5037 sect_off_next
= (sect_offset
) section
.size
;
5040 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5041 dwarf2_per_cu_data
*per_cu
5042 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5043 sect_off_prev
, length
);
5044 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5046 sect_off_prev
= sect_off_next
;
5050 /* Read the CU list from the mapped index, and use it to create all
5051 the CU objects for this dwarf2_per_objfile. */
5054 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5055 const mapped_debug_names
&map
,
5056 const mapped_debug_names
&dwz_map
)
5058 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5059 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5061 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5062 dwarf2_per_objfile
->info
,
5063 false /* is_dwz */);
5065 if (dwz_map
.cu_count
== 0)
5068 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5069 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5073 /* Read .debug_names. If everything went ok, initialize the "quick"
5074 elements of all the CUs and return true. Otherwise, return false. */
5077 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5079 std::unique_ptr
<mapped_debug_names
> map
5080 (new mapped_debug_names (dwarf2_per_objfile
));
5081 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5082 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5084 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5085 &dwarf2_per_objfile
->debug_names
,
5089 /* Don't use the index if it's empty. */
5090 if (map
->name_count
== 0)
5093 /* If there is a .dwz file, read it so we can get its CU list as
5095 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5098 if (!read_debug_names_from_section (objfile
,
5099 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5100 &dwz
->debug_names
, dwz_map
))
5102 warning (_("could not read '.debug_names' section from %s; skipping"),
5103 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5108 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5110 if (map
->tu_count
!= 0)
5112 /* We can only handle a single .debug_types when we have an
5114 if (dwarf2_per_objfile
->types
.size () != 1)
5117 dwarf2_section_info
*section
= &dwarf2_per_objfile
->types
[0];
5119 create_signatured_type_table_from_debug_names
5120 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5123 create_addrmap_from_aranges (dwarf2_per_objfile
,
5124 &dwarf2_per_objfile
->debug_aranges
);
5126 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5127 dwarf2_per_objfile
->using_index
= 1;
5128 dwarf2_per_objfile
->quick_file_names_table
=
5129 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5134 /* Type used to manage iterating over all CUs looking for a symbol for
5137 class dw2_debug_names_iterator
5140 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5141 gdb::optional
<block_enum
> block_index
,
5144 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5145 m_addr (find_vec_in_debug_names (map
, name
))
5148 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5149 search_domain search
, uint32_t namei
)
5152 m_addr (find_vec_in_debug_names (map
, namei
))
5155 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5156 block_enum block_index
, domain_enum domain
,
5158 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5159 m_addr (find_vec_in_debug_names (map
, namei
))
5162 /* Return the next matching CU or NULL if there are no more. */
5163 dwarf2_per_cu_data
*next ();
5166 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5168 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5171 /* The internalized form of .debug_names. */
5172 const mapped_debug_names
&m_map
;
5174 /* If set, only look for symbols that match that block. Valid values are
5175 GLOBAL_BLOCK and STATIC_BLOCK. */
5176 const gdb::optional
<block_enum
> m_block_index
;
5178 /* The kind of symbol we're looking for. */
5179 const domain_enum m_domain
= UNDEF_DOMAIN
;
5180 const search_domain m_search
= ALL_DOMAIN
;
5182 /* The list of CUs from the index entry of the symbol, or NULL if
5184 const gdb_byte
*m_addr
;
5188 mapped_debug_names::namei_to_name (uint32_t namei
) const
5190 const ULONGEST namei_string_offs
5191 = extract_unsigned_integer ((name_table_string_offs_reordered
5192 + namei
* offset_size
),
5195 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5199 /* Find a slot in .debug_names for the object named NAME. If NAME is
5200 found, return pointer to its pool data. If NAME cannot be found,
5204 dw2_debug_names_iterator::find_vec_in_debug_names
5205 (const mapped_debug_names
&map
, const char *name
)
5207 int (*cmp
) (const char *, const char *);
5209 gdb::unique_xmalloc_ptr
<char> without_params
;
5210 if (current_language
->la_language
== language_cplus
5211 || current_language
->la_language
== language_fortran
5212 || current_language
->la_language
== language_d
)
5214 /* NAME is already canonical. Drop any qualifiers as
5215 .debug_names does not contain any. */
5217 if (strchr (name
, '(') != NULL
)
5219 without_params
= cp_remove_params (name
);
5220 if (without_params
!= NULL
)
5221 name
= without_params
.get ();
5225 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5227 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5229 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5230 (map
.bucket_table_reordered
5231 + (full_hash
% map
.bucket_count
)), 4,
5232 map
.dwarf5_byte_order
);
5236 if (namei
>= map
.name_count
)
5238 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5240 namei
, map
.name_count
,
5241 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5247 const uint32_t namei_full_hash
5248 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5249 (map
.hash_table_reordered
+ namei
), 4,
5250 map
.dwarf5_byte_order
);
5251 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5254 if (full_hash
== namei_full_hash
)
5256 const char *const namei_string
= map
.namei_to_name (namei
);
5258 #if 0 /* An expensive sanity check. */
5259 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5261 complaint (_("Wrong .debug_names hash for string at index %u "
5263 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5268 if (cmp (namei_string
, name
) == 0)
5270 const ULONGEST namei_entry_offs
5271 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5272 + namei
* map
.offset_size
),
5273 map
.offset_size
, map
.dwarf5_byte_order
);
5274 return map
.entry_pool
+ namei_entry_offs
;
5279 if (namei
>= map
.name_count
)
5285 dw2_debug_names_iterator::find_vec_in_debug_names
5286 (const mapped_debug_names
&map
, uint32_t namei
)
5288 if (namei
>= map
.name_count
)
5290 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5292 namei
, map
.name_count
,
5293 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5297 const ULONGEST namei_entry_offs
5298 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5299 + namei
* map
.offset_size
),
5300 map
.offset_size
, map
.dwarf5_byte_order
);
5301 return map
.entry_pool
+ namei_entry_offs
;
5304 /* See dw2_debug_names_iterator. */
5306 dwarf2_per_cu_data
*
5307 dw2_debug_names_iterator::next ()
5312 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5313 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5314 bfd
*const abfd
= objfile
->obfd
;
5318 unsigned int bytes_read
;
5319 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5320 m_addr
+= bytes_read
;
5324 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5325 if (indexval_it
== m_map
.abbrev_map
.cend ())
5327 complaint (_("Wrong .debug_names undefined abbrev code %s "
5329 pulongest (abbrev
), objfile_name (objfile
));
5332 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5333 enum class symbol_linkage
{
5337 } symbol_linkage_
= symbol_linkage::unknown
;
5338 dwarf2_per_cu_data
*per_cu
= NULL
;
5339 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5344 case DW_FORM_implicit_const
:
5345 ull
= attr
.implicit_const
;
5347 case DW_FORM_flag_present
:
5351 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5352 m_addr
+= bytes_read
;
5355 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5356 dwarf_form_name (attr
.form
),
5357 objfile_name (objfile
));
5360 switch (attr
.dw_idx
)
5362 case DW_IDX_compile_unit
:
5363 /* Don't crash on bad data. */
5364 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5366 complaint (_(".debug_names entry has bad CU index %s"
5369 objfile_name (dwarf2_per_objfile
->objfile
));
5372 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5374 case DW_IDX_type_unit
:
5375 /* Don't crash on bad data. */
5376 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5378 complaint (_(".debug_names entry has bad TU index %s"
5381 objfile_name (dwarf2_per_objfile
->objfile
));
5384 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5386 case DW_IDX_GNU_internal
:
5387 if (!m_map
.augmentation_is_gdb
)
5389 symbol_linkage_
= symbol_linkage::static_
;
5391 case DW_IDX_GNU_external
:
5392 if (!m_map
.augmentation_is_gdb
)
5394 symbol_linkage_
= symbol_linkage::extern_
;
5399 /* Skip if already read in. */
5400 if (per_cu
->v
.quick
->compunit_symtab
)
5403 /* Check static vs global. */
5404 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5406 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5407 const bool symbol_is_static
=
5408 symbol_linkage_
== symbol_linkage::static_
;
5409 if (want_static
!= symbol_is_static
)
5413 /* Match dw2_symtab_iter_next, symbol_kind
5414 and debug_names::psymbol_tag. */
5418 switch (indexval
.dwarf_tag
)
5420 case DW_TAG_variable
:
5421 case DW_TAG_subprogram
:
5422 /* Some types are also in VAR_DOMAIN. */
5423 case DW_TAG_typedef
:
5424 case DW_TAG_structure_type
:
5431 switch (indexval
.dwarf_tag
)
5433 case DW_TAG_typedef
:
5434 case DW_TAG_structure_type
:
5441 switch (indexval
.dwarf_tag
)
5444 case DW_TAG_variable
:
5451 switch (indexval
.dwarf_tag
)
5463 /* Match dw2_expand_symtabs_matching, symbol_kind and
5464 debug_names::psymbol_tag. */
5467 case VARIABLES_DOMAIN
:
5468 switch (indexval
.dwarf_tag
)
5470 case DW_TAG_variable
:
5476 case FUNCTIONS_DOMAIN
:
5477 switch (indexval
.dwarf_tag
)
5479 case DW_TAG_subprogram
:
5486 switch (indexval
.dwarf_tag
)
5488 case DW_TAG_typedef
:
5489 case DW_TAG_structure_type
:
5495 case MODULES_DOMAIN
:
5496 switch (indexval
.dwarf_tag
)
5510 static struct compunit_symtab
*
5511 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5512 const char *name
, domain_enum domain
)
5514 struct dwarf2_per_objfile
*dwarf2_per_objfile
5515 = get_dwarf2_per_objfile (objfile
);
5517 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
5520 /* index is NULL if OBJF_READNOW. */
5523 const auto &map
= *mapp
;
5525 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5527 struct compunit_symtab
*stab_best
= NULL
;
5528 struct dwarf2_per_cu_data
*per_cu
;
5529 while ((per_cu
= iter
.next ()) != NULL
)
5531 struct symbol
*sym
, *with_opaque
= NULL
;
5532 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
5533 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5534 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5536 sym
= block_find_symbol (block
, name
, domain
,
5537 block_find_non_opaque_type_preferred
,
5540 /* Some caution must be observed with overloaded functions and
5541 methods, since the index will not contain any overload
5542 information (but NAME might contain it). */
5545 && strcmp_iw (sym
->search_name (), name
) == 0)
5547 if (with_opaque
!= NULL
5548 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5551 /* Keep looking through other CUs. */
5557 /* This dumps minimal information about .debug_names. It is called
5558 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5559 uses this to verify that .debug_names has been loaded. */
5562 dw2_debug_names_dump (struct objfile
*objfile
)
5564 struct dwarf2_per_objfile
*dwarf2_per_objfile
5565 = get_dwarf2_per_objfile (objfile
);
5567 gdb_assert (dwarf2_per_objfile
->using_index
);
5568 printf_filtered (".debug_names:");
5569 if (dwarf2_per_objfile
->debug_names_table
)
5570 printf_filtered (" exists\n");
5572 printf_filtered (" faked for \"readnow\"\n");
5573 printf_filtered ("\n");
5577 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5578 const char *func_name
)
5580 struct dwarf2_per_objfile
*dwarf2_per_objfile
5581 = get_dwarf2_per_objfile (objfile
);
5583 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
5584 if (dwarf2_per_objfile
->debug_names_table
)
5586 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5588 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5590 struct dwarf2_per_cu_data
*per_cu
;
5591 while ((per_cu
= iter
.next ()) != NULL
)
5592 dw2_instantiate_symtab (per_cu
, false);
5597 dw2_debug_names_map_matching_symbols
5598 (struct objfile
*objfile
,
5599 const lookup_name_info
&name
, domain_enum domain
,
5601 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5602 symbol_compare_ftype
*ordered_compare
)
5604 struct dwarf2_per_objfile
*dwarf2_per_objfile
5605 = get_dwarf2_per_objfile (objfile
);
5607 /* debug_names_table is NULL if OBJF_READNOW. */
5608 if (!dwarf2_per_objfile
->debug_names_table
)
5611 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5612 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5614 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5615 auto matcher
= [&] (const char *symname
)
5617 if (ordered_compare
== nullptr)
5619 return ordered_compare (symname
, match_name
) == 0;
5622 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5623 [&] (offset_type namei
)
5625 /* The name was matched, now expand corresponding CUs that were
5627 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5629 struct dwarf2_per_cu_data
*per_cu
;
5630 while ((per_cu
= iter
.next ()) != NULL
)
5631 dw2_expand_symtabs_matching_one (per_cu
, nullptr, nullptr);
5635 /* It's a shame we couldn't do this inside the
5636 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5637 that have already been expanded. Instead, this loop matches what
5638 the psymtab code does. */
5639 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5641 struct compunit_symtab
*cust
= per_cu
->v
.quick
->compunit_symtab
;
5642 if (cust
!= nullptr)
5644 const struct block
*block
5645 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
5646 if (!iterate_over_symbols_terminated (block
, name
,
5654 dw2_debug_names_expand_symtabs_matching
5655 (struct objfile
*objfile
,
5656 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5657 const lookup_name_info
*lookup_name
,
5658 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5659 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5660 enum search_domain kind
)
5662 struct dwarf2_per_objfile
*dwarf2_per_objfile
5663 = get_dwarf2_per_objfile (objfile
);
5665 /* debug_names_table is NULL if OBJF_READNOW. */
5666 if (!dwarf2_per_objfile
->debug_names_table
)
5669 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5671 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5673 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5677 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5683 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
5685 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5687 kind
, [&] (offset_type namei
)
5689 /* The name was matched, now expand corresponding CUs that were
5691 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5693 struct dwarf2_per_cu_data
*per_cu
;
5694 while ((per_cu
= iter
.next ()) != NULL
)
5695 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5701 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5704 dw2_find_last_source_symtab
,
5705 dw2_forget_cached_source_info
,
5706 dw2_map_symtabs_matching_filename
,
5707 dw2_debug_names_lookup_symbol
,
5710 dw2_debug_names_dump
,
5711 dw2_debug_names_expand_symtabs_for_function
,
5712 dw2_expand_all_symtabs
,
5713 dw2_expand_symtabs_with_fullname
,
5714 dw2_debug_names_map_matching_symbols
,
5715 dw2_debug_names_expand_symtabs_matching
,
5716 dw2_find_pc_sect_compunit_symtab
,
5718 dw2_map_symbol_filenames
5721 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5722 to either a dwarf2_per_objfile or dwz_file object. */
5724 template <typename T
>
5725 static gdb::array_view
<const gdb_byte
>
5726 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5728 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5730 if (section
->empty ())
5733 /* Older elfutils strip versions could keep the section in the main
5734 executable while splitting it for the separate debug info file. */
5735 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5738 section
->read (obj
);
5740 /* dwarf2_section_info::size is a bfd_size_type, while
5741 gdb::array_view works with size_t. On 32-bit hosts, with
5742 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5743 is 32-bit. So we need an explicit narrowing conversion here.
5744 This is fine, because it's impossible to allocate or mmap an
5745 array/buffer larger than what size_t can represent. */
5746 return gdb::make_array_view (section
->buffer
, section
->size
);
5749 /* Lookup the index cache for the contents of the index associated to
5752 static gdb::array_view
<const gdb_byte
>
5753 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
5755 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5756 if (build_id
== nullptr)
5759 return global_index_cache
.lookup_gdb_index (build_id
,
5760 &dwarf2_obj
->index_cache_res
);
5763 /* Same as the above, but for DWZ. */
5765 static gdb::array_view
<const gdb_byte
>
5766 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5768 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5769 if (build_id
== nullptr)
5772 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5775 /* See symfile.h. */
5778 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5780 struct dwarf2_per_objfile
*dwarf2_per_objfile
5781 = get_dwarf2_per_objfile (objfile
);
5783 /* If we're about to read full symbols, don't bother with the
5784 indices. In this case we also don't care if some other debug
5785 format is making psymtabs, because they are all about to be
5787 if ((objfile
->flags
& OBJF_READNOW
))
5789 dwarf2_per_objfile
->using_index
= 1;
5790 create_all_comp_units (dwarf2_per_objfile
);
5791 create_all_type_units (dwarf2_per_objfile
);
5792 dwarf2_per_objfile
->quick_file_names_table
5793 = create_quick_file_names_table
5794 (dwarf2_per_objfile
->all_comp_units
.size ());
5796 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
5797 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
5799 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
5801 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5802 struct dwarf2_per_cu_quick_data
);
5805 /* Return 1 so that gdb sees the "quick" functions. However,
5806 these functions will be no-ops because we will have expanded
5808 *index_kind
= dw_index_kind::GDB_INDEX
;
5812 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5814 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5818 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5819 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
5820 get_gdb_index_contents_from_section
<dwz_file
>))
5822 *index_kind
= dw_index_kind::GDB_INDEX
;
5826 /* ... otherwise, try to find the index in the index cache. */
5827 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5828 get_gdb_index_contents_from_cache
,
5829 get_gdb_index_contents_from_cache_dwz
))
5831 global_index_cache
.hit ();
5832 *index_kind
= dw_index_kind::GDB_INDEX
;
5836 global_index_cache
.miss ();
5842 /* Build a partial symbol table. */
5845 dwarf2_build_psymtabs (struct objfile
*objfile
)
5847 struct dwarf2_per_objfile
*dwarf2_per_objfile
5848 = get_dwarf2_per_objfile (objfile
);
5850 init_psymbol_list (objfile
, 1024);
5854 /* This isn't really ideal: all the data we allocate on the
5855 objfile's obstack is still uselessly kept around. However,
5856 freeing it seems unsafe. */
5857 psymtab_discarder
psymtabs (objfile
);
5858 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
5861 /* (maybe) store an index in the cache. */
5862 global_index_cache
.store (dwarf2_per_objfile
);
5864 catch (const gdb_exception_error
&except
)
5866 exception_print (gdb_stderr
, except
);
5870 /* Find the base address of the compilation unit for range lists and
5871 location lists. It will normally be specified by DW_AT_low_pc.
5872 In DWARF-3 draft 4, the base address could be overridden by
5873 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5874 compilation units with discontinuous ranges. */
5877 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5879 struct attribute
*attr
;
5881 cu
->base_address
.reset ();
5883 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5884 if (attr
!= nullptr)
5885 cu
->base_address
= attr
->value_as_address ();
5888 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5889 if (attr
!= nullptr)
5890 cu
->base_address
= attr
->value_as_address ();
5894 /* Helper function that returns the proper abbrev section for
5897 static struct dwarf2_section_info
*
5898 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5900 struct dwarf2_section_info
*abbrev
;
5901 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
5903 if (this_cu
->is_dwz
)
5904 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
5906 abbrev
= &dwarf2_per_objfile
->abbrev
;
5911 /* Fetch the abbreviation table offset from a comp or type unit header. */
5914 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5915 struct dwarf2_section_info
*section
,
5916 sect_offset sect_off
)
5918 bfd
*abfd
= section
->get_bfd_owner ();
5919 const gdb_byte
*info_ptr
;
5920 unsigned int initial_length_size
, offset_size
;
5923 section
->read (dwarf2_per_objfile
->objfile
);
5924 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5925 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5926 offset_size
= initial_length_size
== 4 ? 4 : 8;
5927 info_ptr
+= initial_length_size
;
5929 version
= read_2_bytes (abfd
, info_ptr
);
5933 /* Skip unit type and address size. */
5937 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
5940 /* A partial symtab that is used only for include files. */
5941 struct dwarf2_include_psymtab
: public partial_symtab
5943 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
5944 : partial_symtab (filename
, objfile
)
5948 void read_symtab (struct objfile
*objfile
) override
5950 /* It's an include file, no symbols to read for it.
5951 Everything is in the includer symtab. */
5953 /* The expansion of a dwarf2_include_psymtab is just a trigger for
5954 expansion of the includer psymtab. We use the dependencies[0] field to
5955 model the includer. But if we go the regular route of calling
5956 expand_psymtab here, and having expand_psymtab call expand_dependencies
5957 to expand the includer, we'll only use expand_psymtab on the includer
5958 (making it a non-toplevel psymtab), while if we expand the includer via
5959 another path, we'll use read_symtab (making it a toplevel psymtab).
5960 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
5961 psymtab, and trigger read_symtab on the includer here directly. */
5962 includer ()->read_symtab (objfile
);
5965 void expand_psymtab (struct objfile
*objfile
) override
5967 /* This is not called by read_symtab, and should not be called by any
5968 expand_dependencies. */
5972 bool readin_p () const override
5974 return includer ()->readin_p ();
5977 struct compunit_symtab
*get_compunit_symtab () const override
5983 partial_symtab
*includer () const
5985 /* An include psymtab has exactly one dependency: the psymtab that
5987 gdb_assert (this->number_of_dependencies
== 1);
5988 return this->dependencies
[0];
5992 /* Allocate a new partial symtab for file named NAME and mark this new
5993 partial symtab as being an include of PST. */
5996 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
5997 struct objfile
*objfile
)
5999 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6001 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6003 /* It shares objfile->objfile_obstack. */
6004 subpst
->dirname
= pst
->dirname
;
6007 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6008 subpst
->dependencies
[0] = pst
;
6009 subpst
->number_of_dependencies
= 1;
6012 /* Read the Line Number Program data and extract the list of files
6013 included by the source file represented by PST. Build an include
6014 partial symtab for each of these included files. */
6017 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6018 struct die_info
*die
,
6019 dwarf2_psymtab
*pst
)
6022 struct attribute
*attr
;
6024 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6025 if (attr
!= nullptr)
6026 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6028 return; /* No linetable, so no includes. */
6030 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6031 that we pass in the raw text_low here; that is ok because we're
6032 only decoding the line table to make include partial symtabs, and
6033 so the addresses aren't really used. */
6034 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6035 pst
->raw_text_low (), 1);
6039 hash_signatured_type (const void *item
)
6041 const struct signatured_type
*sig_type
6042 = (const struct signatured_type
*) item
;
6044 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6045 return sig_type
->signature
;
6049 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6051 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6052 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6054 return lhs
->signature
== rhs
->signature
;
6057 /* Allocate a hash table for signatured types. */
6060 allocate_signatured_type_table ()
6062 return htab_up (htab_create_alloc (41,
6063 hash_signatured_type
,
6065 NULL
, xcalloc
, xfree
));
6068 /* A helper function to add a signatured type CU to a table. */
6071 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6073 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6074 std::vector
<signatured_type
*> *all_type_units
6075 = (std::vector
<signatured_type
*> *) datum
;
6077 all_type_units
->push_back (sigt
);
6082 /* A helper for create_debug_types_hash_table. Read types from SECTION
6083 and fill them into TYPES_HTAB. It will process only type units,
6084 therefore DW_UT_type. */
6087 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6088 struct dwo_file
*dwo_file
,
6089 dwarf2_section_info
*section
, htab_up
&types_htab
,
6090 rcuh_kind section_kind
)
6092 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6093 struct dwarf2_section_info
*abbrev_section
;
6095 const gdb_byte
*info_ptr
, *end_ptr
;
6097 abbrev_section
= (dwo_file
!= NULL
6098 ? &dwo_file
->sections
.abbrev
6099 : &dwarf2_per_objfile
->abbrev
);
6101 if (dwarf_read_debug
)
6102 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6103 section
->get_name (),
6104 abbrev_section
->get_file_name ());
6106 section
->read (objfile
);
6107 info_ptr
= section
->buffer
;
6109 if (info_ptr
== NULL
)
6112 /* We can't set abfd until now because the section may be empty or
6113 not present, in which case the bfd is unknown. */
6114 abfd
= section
->get_bfd_owner ();
6116 /* We don't use cutu_reader here because we don't need to read
6117 any dies: the signature is in the header. */
6119 end_ptr
= info_ptr
+ section
->size
;
6120 while (info_ptr
< end_ptr
)
6122 struct signatured_type
*sig_type
;
6123 struct dwo_unit
*dwo_tu
;
6125 const gdb_byte
*ptr
= info_ptr
;
6126 struct comp_unit_head header
;
6127 unsigned int length
;
6129 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6131 /* Initialize it due to a false compiler warning. */
6132 header
.signature
= -1;
6133 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6135 /* We need to read the type's signature in order to build the hash
6136 table, but we don't need anything else just yet. */
6138 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6139 abbrev_section
, ptr
, section_kind
);
6141 length
= header
.get_length ();
6143 /* Skip dummy type units. */
6144 if (ptr
>= info_ptr
+ length
6145 || peek_abbrev_code (abfd
, ptr
) == 0
6146 || header
.unit_type
!= DW_UT_type
)
6152 if (types_htab
== NULL
)
6155 types_htab
= allocate_dwo_unit_table ();
6157 types_htab
= allocate_signatured_type_table ();
6163 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6165 dwo_tu
->dwo_file
= dwo_file
;
6166 dwo_tu
->signature
= header
.signature
;
6167 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6168 dwo_tu
->section
= section
;
6169 dwo_tu
->sect_off
= sect_off
;
6170 dwo_tu
->length
= length
;
6174 /* N.B.: type_offset is not usable if this type uses a DWO file.
6175 The real type_offset is in the DWO file. */
6177 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6178 struct signatured_type
);
6179 sig_type
->signature
= header
.signature
;
6180 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6181 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6182 sig_type
->per_cu
.is_debug_types
= 1;
6183 sig_type
->per_cu
.section
= section
;
6184 sig_type
->per_cu
.sect_off
= sect_off
;
6185 sig_type
->per_cu
.length
= length
;
6188 slot
= htab_find_slot (types_htab
.get (),
6189 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6191 gdb_assert (slot
!= NULL
);
6194 sect_offset dup_sect_off
;
6198 const struct dwo_unit
*dup_tu
6199 = (const struct dwo_unit
*) *slot
;
6201 dup_sect_off
= dup_tu
->sect_off
;
6205 const struct signatured_type
*dup_tu
6206 = (const struct signatured_type
*) *slot
;
6208 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6211 complaint (_("debug type entry at offset %s is duplicate to"
6212 " the entry at offset %s, signature %s"),
6213 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6214 hex_string (header
.signature
));
6216 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6218 if (dwarf_read_debug
> 1)
6219 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6220 sect_offset_str (sect_off
),
6221 hex_string (header
.signature
));
6227 /* Create the hash table of all entries in the .debug_types
6228 (or .debug_types.dwo) section(s).
6229 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6230 otherwise it is NULL.
6232 The result is a pointer to the hash table or NULL if there are no types.
6234 Note: This function processes DWO files only, not DWP files. */
6237 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6238 struct dwo_file
*dwo_file
,
6239 gdb::array_view
<dwarf2_section_info
> type_sections
,
6240 htab_up
&types_htab
)
6242 for (dwarf2_section_info
§ion
: type_sections
)
6243 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6244 types_htab
, rcuh_kind::TYPE
);
6247 /* Create the hash table of all entries in the .debug_types section,
6248 and initialize all_type_units.
6249 The result is zero if there is an error (e.g. missing .debug_types section),
6250 otherwise non-zero. */
6253 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6257 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6258 &dwarf2_per_objfile
->info
, types_htab
,
6259 rcuh_kind::COMPILE
);
6260 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6261 dwarf2_per_objfile
->types
, types_htab
);
6262 if (types_htab
== NULL
)
6264 dwarf2_per_objfile
->signatured_types
= NULL
;
6268 dwarf2_per_objfile
->signatured_types
= std::move (types_htab
);
6270 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6271 dwarf2_per_objfile
->all_type_units
.reserve
6272 (htab_elements (dwarf2_per_objfile
->signatured_types
.get ()));
6274 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
.get (),
6275 add_signatured_type_cu_to_table
,
6276 &dwarf2_per_objfile
->all_type_units
);
6281 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6282 If SLOT is non-NULL, it is the entry to use in the hash table.
6283 Otherwise we find one. */
6285 static struct signatured_type
*
6286 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6289 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6291 if (dwarf2_per_objfile
->all_type_units
.size ()
6292 == dwarf2_per_objfile
->all_type_units
.capacity ())
6293 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6295 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6296 struct signatured_type
);
6298 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6299 sig_type
->signature
= sig
;
6300 sig_type
->per_cu
.is_debug_types
= 1;
6301 if (dwarf2_per_objfile
->using_index
)
6303 sig_type
->per_cu
.v
.quick
=
6304 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6305 struct dwarf2_per_cu_quick_data
);
6310 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6313 gdb_assert (*slot
== NULL
);
6315 /* The rest of sig_type must be filled in by the caller. */
6319 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6320 Fill in SIG_ENTRY with DWO_ENTRY. */
6323 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6324 struct signatured_type
*sig_entry
,
6325 struct dwo_unit
*dwo_entry
)
6327 /* Make sure we're not clobbering something we don't expect to. */
6328 gdb_assert (! sig_entry
->per_cu
.queued
);
6329 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6330 if (dwarf2_per_objfile
->using_index
)
6332 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6333 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6336 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6337 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6338 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6339 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6340 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6342 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6343 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6344 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6345 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6346 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6347 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6348 sig_entry
->dwo_unit
= dwo_entry
;
6351 /* Subroutine of lookup_signatured_type.
6352 If we haven't read the TU yet, create the signatured_type data structure
6353 for a TU to be read in directly from a DWO file, bypassing the stub.
6354 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6355 using .gdb_index, then when reading a CU we want to stay in the DWO file
6356 containing that CU. Otherwise we could end up reading several other DWO
6357 files (due to comdat folding) to process the transitive closure of all the
6358 mentioned TUs, and that can be slow. The current DWO file will have every
6359 type signature that it needs.
6360 We only do this for .gdb_index because in the psymtab case we already have
6361 to read all the DWOs to build the type unit groups. */
6363 static struct signatured_type
*
6364 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6366 struct dwarf2_per_objfile
*dwarf2_per_objfile
6367 = cu
->per_cu
->dwarf2_per_objfile
;
6368 struct dwo_file
*dwo_file
;
6369 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6370 struct signatured_type find_sig_entry
, *sig_entry
;
6373 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6375 /* If TU skeletons have been removed then we may not have read in any
6377 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6378 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6380 /* We only ever need to read in one copy of a signatured type.
6381 Use the global signatured_types array to do our own comdat-folding
6382 of types. If this is the first time we're reading this TU, and
6383 the TU has an entry in .gdb_index, replace the recorded data from
6384 .gdb_index with this TU. */
6386 find_sig_entry
.signature
= sig
;
6387 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6388 &find_sig_entry
, INSERT
);
6389 sig_entry
= (struct signatured_type
*) *slot
;
6391 /* We can get here with the TU already read, *or* in the process of being
6392 read. Don't reassign the global entry to point to this DWO if that's
6393 the case. Also note that if the TU is already being read, it may not
6394 have come from a DWO, the program may be a mix of Fission-compiled
6395 code and non-Fission-compiled code. */
6397 /* Have we already tried to read this TU?
6398 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6399 needn't exist in the global table yet). */
6400 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6403 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6404 dwo_unit of the TU itself. */
6405 dwo_file
= cu
->dwo_unit
->dwo_file
;
6407 /* Ok, this is the first time we're reading this TU. */
6408 if (dwo_file
->tus
== NULL
)
6410 find_dwo_entry
.signature
= sig
;
6411 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6413 if (dwo_entry
== NULL
)
6416 /* If the global table doesn't have an entry for this TU, add one. */
6417 if (sig_entry
== NULL
)
6418 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6420 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6421 sig_entry
->per_cu
.tu_read
= 1;
6425 /* Subroutine of lookup_signatured_type.
6426 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6427 then try the DWP file. If the TU stub (skeleton) has been removed then
6428 it won't be in .gdb_index. */
6430 static struct signatured_type
*
6431 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6433 struct dwarf2_per_objfile
*dwarf2_per_objfile
6434 = cu
->per_cu
->dwarf2_per_objfile
;
6435 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6436 struct dwo_unit
*dwo_entry
;
6437 struct signatured_type find_sig_entry
, *sig_entry
;
6440 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6441 gdb_assert (dwp_file
!= NULL
);
6443 /* If TU skeletons have been removed then we may not have read in any
6445 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6446 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
6448 find_sig_entry
.signature
= sig
;
6449 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
6450 &find_sig_entry
, INSERT
);
6451 sig_entry
= (struct signatured_type
*) *slot
;
6453 /* Have we already tried to read this TU?
6454 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6455 needn't exist in the global table yet). */
6456 if (sig_entry
!= NULL
)
6459 if (dwp_file
->tus
== NULL
)
6461 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6462 sig
, 1 /* is_debug_types */);
6463 if (dwo_entry
== NULL
)
6466 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6467 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6472 /* Lookup a signature based type for DW_FORM_ref_sig8.
6473 Returns NULL if signature SIG is not present in the table.
6474 It is up to the caller to complain about this. */
6476 static struct signatured_type
*
6477 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6479 struct dwarf2_per_objfile
*dwarf2_per_objfile
6480 = cu
->per_cu
->dwarf2_per_objfile
;
6483 && dwarf2_per_objfile
->using_index
)
6485 /* We're in a DWO/DWP file, and we're using .gdb_index.
6486 These cases require special processing. */
6487 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6488 return lookup_dwo_signatured_type (cu
, sig
);
6490 return lookup_dwp_signatured_type (cu
, sig
);
6494 struct signatured_type find_entry
, *entry
;
6496 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6498 find_entry
.signature
= sig
;
6499 entry
= ((struct signatured_type
*)
6500 htab_find (dwarf2_per_objfile
->signatured_types
.get (),
6506 /* Low level DIE reading support. */
6508 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6511 init_cu_die_reader (struct die_reader_specs
*reader
,
6512 struct dwarf2_cu
*cu
,
6513 struct dwarf2_section_info
*section
,
6514 struct dwo_file
*dwo_file
,
6515 struct abbrev_table
*abbrev_table
)
6517 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6518 reader
->abfd
= section
->get_bfd_owner ();
6520 reader
->dwo_file
= dwo_file
;
6521 reader
->die_section
= section
;
6522 reader
->buffer
= section
->buffer
;
6523 reader
->buffer_end
= section
->buffer
+ section
->size
;
6524 reader
->abbrev_table
= abbrev_table
;
6527 /* Subroutine of cutu_reader to simplify it.
6528 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6529 There's just a lot of work to do, and cutu_reader is big enough
6532 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6533 from it to the DIE in the DWO. If NULL we are skipping the stub.
6534 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6535 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6536 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6537 STUB_COMP_DIR may be non-NULL.
6538 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6539 are filled in with the info of the DIE from the DWO file.
6540 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6541 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6542 kept around for at least as long as *RESULT_READER.
6544 The result is non-zero if a valid (non-dummy) DIE was found. */
6547 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6548 struct dwo_unit
*dwo_unit
,
6549 struct die_info
*stub_comp_unit_die
,
6550 const char *stub_comp_dir
,
6551 struct die_reader_specs
*result_reader
,
6552 const gdb_byte
**result_info_ptr
,
6553 struct die_info
**result_comp_unit_die
,
6554 abbrev_table_up
*result_dwo_abbrev_table
)
6556 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6557 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6558 struct dwarf2_cu
*cu
= this_cu
->cu
;
6560 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6561 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6562 int i
,num_extra_attrs
;
6563 struct dwarf2_section_info
*dwo_abbrev_section
;
6564 struct die_info
*comp_unit_die
;
6566 /* At most one of these may be provided. */
6567 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6569 /* These attributes aren't processed until later:
6570 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6571 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6572 referenced later. However, these attributes are found in the stub
6573 which we won't have later. In order to not impose this complication
6574 on the rest of the code, we read them here and copy them to the
6583 if (stub_comp_unit_die
!= NULL
)
6585 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6587 if (! this_cu
->is_debug_types
)
6588 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6589 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6590 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6591 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6592 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6594 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6596 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6597 here (if needed). We need the value before we can process
6599 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6601 else if (stub_comp_dir
!= NULL
)
6603 /* Reconstruct the comp_dir attribute to simplify the code below. */
6604 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6605 comp_dir
->name
= DW_AT_comp_dir
;
6606 comp_dir
->form
= DW_FORM_string
;
6607 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6608 DW_STRING (comp_dir
) = stub_comp_dir
;
6611 /* Set up for reading the DWO CU/TU. */
6612 cu
->dwo_unit
= dwo_unit
;
6613 dwarf2_section_info
*section
= dwo_unit
->section
;
6614 section
->read (objfile
);
6615 abfd
= section
->get_bfd_owner ();
6616 begin_info_ptr
= info_ptr
= (section
->buffer
6617 + to_underlying (dwo_unit
->sect_off
));
6618 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6620 if (this_cu
->is_debug_types
)
6622 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6624 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6625 &cu
->header
, section
,
6627 info_ptr
, rcuh_kind::TYPE
);
6628 /* This is not an assert because it can be caused by bad debug info. */
6629 if (sig_type
->signature
!= cu
->header
.signature
)
6631 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6632 " TU at offset %s [in module %s]"),
6633 hex_string (sig_type
->signature
),
6634 hex_string (cu
->header
.signature
),
6635 sect_offset_str (dwo_unit
->sect_off
),
6636 bfd_get_filename (abfd
));
6638 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6639 /* For DWOs coming from DWP files, we don't know the CU length
6640 nor the type's offset in the TU until now. */
6641 dwo_unit
->length
= cu
->header
.get_length ();
6642 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6644 /* Establish the type offset that can be used to lookup the type.
6645 For DWO files, we don't know it until now. */
6646 sig_type
->type_offset_in_section
6647 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6651 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6652 &cu
->header
, section
,
6654 info_ptr
, rcuh_kind::COMPILE
);
6655 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6656 /* For DWOs coming from DWP files, we don't know the CU length
6658 dwo_unit
->length
= cu
->header
.get_length ();
6661 *result_dwo_abbrev_table
6662 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6663 cu
->header
.abbrev_sect_off
);
6664 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6665 result_dwo_abbrev_table
->get ());
6667 /* Read in the die, but leave space to copy over the attributes
6668 from the stub. This has the benefit of simplifying the rest of
6669 the code - all the work to maintain the illusion of a single
6670 DW_TAG_{compile,type}_unit DIE is done here. */
6671 num_extra_attrs
= ((stmt_list
!= NULL
)
6675 + (comp_dir
!= NULL
));
6676 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6679 /* Copy over the attributes from the stub to the DIE we just read in. */
6680 comp_unit_die
= *result_comp_unit_die
;
6681 i
= comp_unit_die
->num_attrs
;
6682 if (stmt_list
!= NULL
)
6683 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6685 comp_unit_die
->attrs
[i
++] = *low_pc
;
6686 if (high_pc
!= NULL
)
6687 comp_unit_die
->attrs
[i
++] = *high_pc
;
6689 comp_unit_die
->attrs
[i
++] = *ranges
;
6690 if (comp_dir
!= NULL
)
6691 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6692 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6694 if (dwarf_die_debug
)
6696 fprintf_unfiltered (gdb_stdlog
,
6697 "Read die from %s@0x%x of %s:\n",
6698 section
->get_name (),
6699 (unsigned) (begin_info_ptr
- section
->buffer
),
6700 bfd_get_filename (abfd
));
6701 dump_die (comp_unit_die
, dwarf_die_debug
);
6704 /* Skip dummy compilation units. */
6705 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6706 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6709 *result_info_ptr
= info_ptr
;
6713 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6714 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6715 signature is part of the header. */
6716 static gdb::optional
<ULONGEST
>
6717 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6719 if (cu
->header
.version
>= 5)
6720 return cu
->header
.signature
;
6721 struct attribute
*attr
;
6722 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6723 if (attr
== nullptr)
6724 return gdb::optional
<ULONGEST
> ();
6725 return DW_UNSND (attr
);
6728 /* Subroutine of cutu_reader to simplify it.
6729 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6730 Returns NULL if the specified DWO unit cannot be found. */
6732 static struct dwo_unit
*
6733 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6734 struct die_info
*comp_unit_die
,
6735 const char *dwo_name
)
6737 struct dwarf2_cu
*cu
= this_cu
->cu
;
6738 struct dwo_unit
*dwo_unit
;
6739 const char *comp_dir
;
6741 gdb_assert (cu
!= NULL
);
6743 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6744 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6745 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6747 if (this_cu
->is_debug_types
)
6749 struct signatured_type
*sig_type
;
6751 /* Since this_cu is the first member of struct signatured_type,
6752 we can go from a pointer to one to a pointer to the other. */
6753 sig_type
= (struct signatured_type
*) this_cu
;
6754 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6758 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6759 if (!signature
.has_value ())
6760 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6762 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
6763 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6770 /* Subroutine of cutu_reader to simplify it.
6771 See it for a description of the parameters.
6772 Read a TU directly from a DWO file, bypassing the stub. */
6775 cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6776 int use_existing_cu
)
6778 struct signatured_type
*sig_type
;
6780 /* Verify we can do the following downcast, and that we have the
6782 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6783 sig_type
= (struct signatured_type
*) this_cu
;
6784 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6786 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6788 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6789 /* There's no need to do the rereading_dwo_cu handling that
6790 cutu_reader does since we don't read the stub. */
6794 /* If !use_existing_cu, this_cu->cu must be NULL. */
6795 gdb_assert (this_cu
->cu
== NULL
);
6796 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6799 /* A future optimization, if needed, would be to use an existing
6800 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6801 could share abbrev tables. */
6803 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6804 NULL
/* stub_comp_unit_die */,
6805 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6808 &m_dwo_abbrev_table
) == 0)
6815 /* Initialize a CU (or TU) and read its DIEs.
6816 If the CU defers to a DWO file, read the DWO file as well.
6818 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6819 Otherwise the table specified in the comp unit header is read in and used.
6820 This is an optimization for when we already have the abbrev table.
6822 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6823 Otherwise, a new CU is allocated with xmalloc. */
6825 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
6826 struct abbrev_table
*abbrev_table
,
6827 int use_existing_cu
,
6829 : die_reader_specs
{},
6832 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6833 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6834 struct dwarf2_section_info
*section
= this_cu
->section
;
6835 bfd
*abfd
= section
->get_bfd_owner ();
6836 struct dwarf2_cu
*cu
;
6837 const gdb_byte
*begin_info_ptr
;
6838 struct signatured_type
*sig_type
= NULL
;
6839 struct dwarf2_section_info
*abbrev_section
;
6840 /* Non-zero if CU currently points to a DWO file and we need to
6841 reread it. When this happens we need to reread the skeleton die
6842 before we can reread the DWO file (this only applies to CUs, not TUs). */
6843 int rereading_dwo_cu
= 0;
6845 if (dwarf_die_debug
)
6846 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6847 this_cu
->is_debug_types
? "type" : "comp",
6848 sect_offset_str (this_cu
->sect_off
));
6850 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6851 file (instead of going through the stub), short-circuit all of this. */
6852 if (this_cu
->reading_dwo_directly
)
6854 /* Narrow down the scope of possibilities to have to understand. */
6855 gdb_assert (this_cu
->is_debug_types
);
6856 gdb_assert (abbrev_table
== NULL
);
6857 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
);
6861 /* This is cheap if the section is already read in. */
6862 section
->read (objfile
);
6864 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6866 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6868 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6871 /* If this CU is from a DWO file we need to start over, we need to
6872 refetch the attributes from the skeleton CU.
6873 This could be optimized by retrieving those attributes from when we
6874 were here the first time: the previous comp_unit_die was stored in
6875 comp_unit_obstack. But there's no data yet that we need this
6877 if (cu
->dwo_unit
!= NULL
)
6878 rereading_dwo_cu
= 1;
6882 /* If !use_existing_cu, this_cu->cu must be NULL. */
6883 gdb_assert (this_cu
->cu
== NULL
);
6884 m_new_cu
.reset (new dwarf2_cu (this_cu
));
6885 cu
= m_new_cu
.get ();
6888 /* Get the header. */
6889 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6891 /* We already have the header, there's no need to read it in again. */
6892 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6896 if (this_cu
->is_debug_types
)
6898 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6899 &cu
->header
, section
,
6900 abbrev_section
, info_ptr
,
6903 /* Since per_cu is the first member of struct signatured_type,
6904 we can go from a pointer to one to a pointer to the other. */
6905 sig_type
= (struct signatured_type
*) this_cu
;
6906 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6907 gdb_assert (sig_type
->type_offset_in_tu
6908 == cu
->header
.type_cu_offset_in_tu
);
6909 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6911 /* LENGTH has not been set yet for type units if we're
6912 using .gdb_index. */
6913 this_cu
->length
= cu
->header
.get_length ();
6915 /* Establish the type offset that can be used to lookup the type. */
6916 sig_type
->type_offset_in_section
=
6917 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6919 this_cu
->dwarf_version
= cu
->header
.version
;
6923 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6924 &cu
->header
, section
,
6927 rcuh_kind::COMPILE
);
6929 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6930 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
6931 this_cu
->dwarf_version
= cu
->header
.version
;
6935 /* Skip dummy compilation units. */
6936 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6937 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6943 /* If we don't have them yet, read the abbrevs for this compilation unit.
6944 And if we need to read them now, make sure they're freed when we're
6946 if (abbrev_table
!= NULL
)
6947 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6950 m_abbrev_table_holder
6951 = abbrev_table::read (objfile
, abbrev_section
,
6952 cu
->header
.abbrev_sect_off
);
6953 abbrev_table
= m_abbrev_table_holder
.get ();
6956 /* Read the top level CU/TU die. */
6957 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
6958 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
6960 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
6966 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6967 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
6968 table from the DWO file and pass the ownership over to us. It will be
6969 referenced from READER, so we must make sure to free it after we're done
6972 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6973 DWO CU, that this test will fail (the attribute will not be present). */
6974 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6975 if (dwo_name
!= nullptr)
6977 struct dwo_unit
*dwo_unit
;
6978 struct die_info
*dwo_comp_unit_die
;
6980 if (comp_unit_die
->has_children
)
6982 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
6983 " has children (offset %s) [in module %s]"),
6984 sect_offset_str (this_cu
->sect_off
),
6985 bfd_get_filename (abfd
));
6987 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
6988 if (dwo_unit
!= NULL
)
6990 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6991 comp_unit_die
, NULL
,
6994 &m_dwo_abbrev_table
) == 0)
7000 comp_unit_die
= dwo_comp_unit_die
;
7004 /* Yikes, we couldn't find the rest of the DIE, we only have
7005 the stub. A complaint has already been logged. There's
7006 not much more we can do except pass on the stub DIE to
7007 die_reader_func. We don't want to throw an error on bad
7014 cutu_reader::keep ()
7016 /* Done, clean up. */
7017 gdb_assert (!dummy_p
);
7018 if (m_new_cu
!= NULL
)
7020 struct dwarf2_per_objfile
*dwarf2_per_objfile
7021 = m_this_cu
->dwarf2_per_objfile
;
7022 /* Link this CU into read_in_chain. */
7023 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7024 dwarf2_per_objfile
->read_in_chain
= m_this_cu
;
7025 /* The chain owns it now. */
7026 m_new_cu
.release ();
7030 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7031 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7032 assumed to have already done the lookup to find the DWO file).
7034 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7035 THIS_CU->is_debug_types, but nothing else.
7037 We fill in THIS_CU->length.
7039 THIS_CU->cu is always freed when done.
7040 This is done in order to not leave THIS_CU->cu in a state where we have
7041 to care whether it refers to the "main" CU or the DWO CU.
7043 When parent_cu is passed, it is used to provide a default value for
7044 str_offsets_base and addr_base from the parent. */
7046 cutu_reader::cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
7047 struct dwarf2_cu
*parent_cu
,
7048 struct dwo_file
*dwo_file
)
7049 : die_reader_specs
{},
7052 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7053 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7054 struct dwarf2_section_info
*section
= this_cu
->section
;
7055 bfd
*abfd
= section
->get_bfd_owner ();
7056 struct dwarf2_section_info
*abbrev_section
;
7057 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7059 if (dwarf_die_debug
)
7060 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7061 this_cu
->is_debug_types
? "type" : "comp",
7062 sect_offset_str (this_cu
->sect_off
));
7064 gdb_assert (this_cu
->cu
== NULL
);
7066 abbrev_section
= (dwo_file
!= NULL
7067 ? &dwo_file
->sections
.abbrev
7068 : get_abbrev_section_for_cu (this_cu
));
7070 /* This is cheap if the section is already read in. */
7071 section
->read (objfile
);
7073 m_new_cu
.reset (new dwarf2_cu (this_cu
));
7075 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7076 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7077 &m_new_cu
->header
, section
,
7078 abbrev_section
, info_ptr
,
7079 (this_cu
->is_debug_types
7081 : rcuh_kind::COMPILE
));
7083 if (parent_cu
!= nullptr)
7085 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7086 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7088 this_cu
->length
= m_new_cu
->header
.get_length ();
7090 /* Skip dummy compilation units. */
7091 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7092 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7098 m_abbrev_table_holder
7099 = abbrev_table::read (objfile
, abbrev_section
,
7100 m_new_cu
->header
.abbrev_sect_off
);
7102 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7103 m_abbrev_table_holder
.get ());
7104 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7108 /* Type Unit Groups.
7110 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7111 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7112 so that all types coming from the same compilation (.o file) are grouped
7113 together. A future step could be to put the types in the same symtab as
7114 the CU the types ultimately came from. */
7117 hash_type_unit_group (const void *item
)
7119 const struct type_unit_group
*tu_group
7120 = (const struct type_unit_group
*) item
;
7122 return hash_stmt_list_entry (&tu_group
->hash
);
7126 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7128 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7129 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7131 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7134 /* Allocate a hash table for type unit groups. */
7137 allocate_type_unit_groups_table ()
7139 return htab_up (htab_create_alloc (3,
7140 hash_type_unit_group
,
7142 NULL
, xcalloc
, xfree
));
7145 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7146 partial symtabs. We combine several TUs per psymtab to not let the size
7147 of any one psymtab grow too big. */
7148 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7149 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7151 /* Helper routine for get_type_unit_group.
7152 Create the type_unit_group object used to hold one or more TUs. */
7154 static struct type_unit_group
*
7155 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7157 struct dwarf2_per_objfile
*dwarf2_per_objfile
7158 = cu
->per_cu
->dwarf2_per_objfile
;
7159 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7160 struct dwarf2_per_cu_data
*per_cu
;
7161 struct type_unit_group
*tu_group
;
7163 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7164 struct type_unit_group
);
7165 per_cu
= &tu_group
->per_cu
;
7166 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7168 if (dwarf2_per_objfile
->using_index
)
7170 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7171 struct dwarf2_per_cu_quick_data
);
7175 unsigned int line_offset
= to_underlying (line_offset_struct
);
7176 dwarf2_psymtab
*pst
;
7179 /* Give the symtab a useful name for debug purposes. */
7180 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7181 name
= string_printf ("<type_units_%d>",
7182 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7184 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7186 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7187 pst
->anonymous
= true;
7190 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7191 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7196 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7197 STMT_LIST is a DW_AT_stmt_list attribute. */
7199 static struct type_unit_group
*
7200 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7202 struct dwarf2_per_objfile
*dwarf2_per_objfile
7203 = cu
->per_cu
->dwarf2_per_objfile
;
7204 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7205 struct type_unit_group
*tu_group
;
7207 unsigned int line_offset
;
7208 struct type_unit_group type_unit_group_for_lookup
;
7210 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7211 dwarf2_per_objfile
->type_unit_groups
= allocate_type_unit_groups_table ();
7213 /* Do we need to create a new group, or can we use an existing one? */
7217 line_offset
= DW_UNSND (stmt_list
);
7218 ++tu_stats
->nr_symtab_sharers
;
7222 /* Ugh, no stmt_list. Rare, but we have to handle it.
7223 We can do various things here like create one group per TU or
7224 spread them over multiple groups to split up the expansion work.
7225 To avoid worst case scenarios (too many groups or too large groups)
7226 we, umm, group them in bunches. */
7227 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7228 | (tu_stats
->nr_stmt_less_type_units
7229 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7230 ++tu_stats
->nr_stmt_less_type_units
;
7233 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7234 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7235 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
.get (),
7236 &type_unit_group_for_lookup
, INSERT
);
7239 tu_group
= (struct type_unit_group
*) *slot
;
7240 gdb_assert (tu_group
!= NULL
);
7244 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7245 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7247 ++tu_stats
->nr_symtabs
;
7253 /* Partial symbol tables. */
7255 /* Create a psymtab named NAME and assign it to PER_CU.
7257 The caller must fill in the following details:
7258 dirname, textlow, texthigh. */
7260 static dwarf2_psymtab
*
7261 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7263 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7264 dwarf2_psymtab
*pst
;
7266 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7268 pst
->psymtabs_addrmap_supported
= true;
7270 /* This is the glue that links PST into GDB's symbol API. */
7271 per_cu
->v
.psymtab
= pst
;
7276 /* DIE reader function for process_psymtab_comp_unit. */
7279 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7280 const gdb_byte
*info_ptr
,
7281 struct die_info
*comp_unit_die
,
7282 enum language pretend_language
)
7284 struct dwarf2_cu
*cu
= reader
->cu
;
7285 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7286 struct gdbarch
*gdbarch
= objfile
->arch ();
7287 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7289 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7290 dwarf2_psymtab
*pst
;
7291 enum pc_bounds_kind cu_bounds_kind
;
7292 const char *filename
;
7294 gdb_assert (! per_cu
->is_debug_types
);
7296 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7298 /* Allocate a new partial symbol table structure. */
7299 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7300 static const char artificial
[] = "<artificial>";
7301 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7302 if (filename
== NULL
)
7304 else if (strcmp (filename
, artificial
) == 0)
7306 debug_filename
.reset (concat (artificial
, "@",
7307 sect_offset_str (per_cu
->sect_off
),
7309 filename
= debug_filename
.get ();
7312 pst
= create_partial_symtab (per_cu
, filename
);
7314 /* This must be done before calling dwarf2_build_include_psymtabs. */
7315 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7317 baseaddr
= objfile
->text_section_offset ();
7319 dwarf2_find_base_address (comp_unit_die
, cu
);
7321 /* Possibly set the default values of LOWPC and HIGHPC from
7323 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7324 &best_highpc
, cu
, pst
);
7325 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7328 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7331 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7333 /* Store the contiguous range if it is not empty; it can be
7334 empty for CUs with no code. */
7335 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7339 /* Check if comp unit has_children.
7340 If so, read the rest of the partial symbols from this comp unit.
7341 If not, there's no more debug_info for this comp unit. */
7342 if (comp_unit_die
->has_children
)
7344 struct partial_die_info
*first_die
;
7345 CORE_ADDR lowpc
, highpc
;
7347 lowpc
= ((CORE_ADDR
) -1);
7348 highpc
= ((CORE_ADDR
) 0);
7350 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7352 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7353 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7355 /* If we didn't find a lowpc, set it to highpc to avoid
7356 complaints from `maint check'. */
7357 if (lowpc
== ((CORE_ADDR
) -1))
7360 /* If the compilation unit didn't have an explicit address range,
7361 then use the information extracted from its child dies. */
7362 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7365 best_highpc
= highpc
;
7368 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7369 best_lowpc
+ baseaddr
)
7371 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7372 best_highpc
+ baseaddr
)
7375 end_psymtab_common (objfile
, pst
);
7377 if (!cu
->per_cu
->imported_symtabs_empty ())
7380 int len
= cu
->per_cu
->imported_symtabs_size ();
7382 /* Fill in 'dependencies' here; we fill in 'users' in a
7384 pst
->number_of_dependencies
= len
;
7386 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7387 for (i
= 0; i
< len
; ++i
)
7389 pst
->dependencies
[i
]
7390 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7393 cu
->per_cu
->imported_symtabs_free ();
7396 /* Get the list of files included in the current compilation unit,
7397 and build a psymtab for each of them. */
7398 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7400 if (dwarf_read_debug
)
7401 fprintf_unfiltered (gdb_stdlog
,
7402 "Psymtab for %s unit @%s: %s - %s"
7403 ", %d global, %d static syms\n",
7404 per_cu
->is_debug_types
? "type" : "comp",
7405 sect_offset_str (per_cu
->sect_off
),
7406 paddress (gdbarch
, pst
->text_low (objfile
)),
7407 paddress (gdbarch
, pst
->text_high (objfile
)),
7408 pst
->n_global_syms
, pst
->n_static_syms
);
7411 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7412 Process compilation unit THIS_CU for a psymtab. */
7415 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7416 bool want_partial_unit
,
7417 enum language pretend_language
)
7419 /* If this compilation unit was already read in, free the
7420 cached copy in order to read it in again. This is
7421 necessary because we skipped some symbols when we first
7422 read in the compilation unit (see load_partial_dies).
7423 This problem could be avoided, but the benefit is unclear. */
7424 if (this_cu
->cu
!= NULL
)
7425 free_one_cached_comp_unit (this_cu
);
7427 cutu_reader
reader (this_cu
, NULL
, 0, false);
7429 switch (reader
.comp_unit_die
->tag
)
7431 case DW_TAG_compile_unit
:
7432 this_cu
->unit_type
= DW_UT_compile
;
7434 case DW_TAG_partial_unit
:
7435 this_cu
->unit_type
= DW_UT_partial
;
7445 else if (this_cu
->is_debug_types
)
7446 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7447 reader
.comp_unit_die
);
7448 else if (want_partial_unit
7449 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7450 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7451 reader
.comp_unit_die
,
7454 this_cu
->lang
= this_cu
->cu
->language
;
7456 /* Age out any secondary CUs. */
7457 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7460 /* Reader function for build_type_psymtabs. */
7463 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7464 const gdb_byte
*info_ptr
,
7465 struct die_info
*type_unit_die
)
7467 struct dwarf2_per_objfile
*dwarf2_per_objfile
7468 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
7469 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7470 struct dwarf2_cu
*cu
= reader
->cu
;
7471 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7472 struct signatured_type
*sig_type
;
7473 struct type_unit_group
*tu_group
;
7474 struct attribute
*attr
;
7475 struct partial_die_info
*first_die
;
7476 CORE_ADDR lowpc
, highpc
;
7477 dwarf2_psymtab
*pst
;
7479 gdb_assert (per_cu
->is_debug_types
);
7480 sig_type
= (struct signatured_type
*) per_cu
;
7482 if (! type_unit_die
->has_children
)
7485 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7486 tu_group
= get_type_unit_group (cu
, attr
);
7488 if (tu_group
->tus
== nullptr)
7489 tu_group
->tus
= new std::vector
<signatured_type
*>;
7490 tu_group
->tus
->push_back (sig_type
);
7492 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7493 pst
= create_partial_symtab (per_cu
, "");
7494 pst
->anonymous
= true;
7496 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7498 lowpc
= (CORE_ADDR
) -1;
7499 highpc
= (CORE_ADDR
) 0;
7500 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7502 end_psymtab_common (objfile
, pst
);
7505 /* Struct used to sort TUs by their abbreviation table offset. */
7507 struct tu_abbrev_offset
7509 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7510 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7513 signatured_type
*sig_type
;
7514 sect_offset abbrev_offset
;
7517 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7520 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7521 const struct tu_abbrev_offset
&b
)
7523 return a
.abbrev_offset
< b
.abbrev_offset
;
7526 /* Efficiently read all the type units.
7527 This does the bulk of the work for build_type_psymtabs.
7529 The efficiency is because we sort TUs by the abbrev table they use and
7530 only read each abbrev table once. In one program there are 200K TUs
7531 sharing 8K abbrev tables.
7533 The main purpose of this function is to support building the
7534 dwarf2_per_objfile->type_unit_groups table.
7535 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7536 can collapse the search space by grouping them by stmt_list.
7537 The savings can be significant, in the same program from above the 200K TUs
7538 share 8K stmt_list tables.
7540 FUNC is expected to call get_type_unit_group, which will create the
7541 struct type_unit_group if necessary and add it to
7542 dwarf2_per_objfile->type_unit_groups. */
7545 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7547 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7548 abbrev_table_up abbrev_table
;
7549 sect_offset abbrev_offset
;
7551 /* It's up to the caller to not call us multiple times. */
7552 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7554 if (dwarf2_per_objfile
->all_type_units
.empty ())
7557 /* TUs typically share abbrev tables, and there can be way more TUs than
7558 abbrev tables. Sort by abbrev table to reduce the number of times we
7559 read each abbrev table in.
7560 Alternatives are to punt or to maintain a cache of abbrev tables.
7561 This is simpler and efficient enough for now.
7563 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7564 symtab to use). Typically TUs with the same abbrev offset have the same
7565 stmt_list value too so in practice this should work well.
7567 The basic algorithm here is:
7569 sort TUs by abbrev table
7570 for each TU with same abbrev table:
7571 read abbrev table if first user
7572 read TU top level DIE
7573 [IWBN if DWO skeletons had DW_AT_stmt_list]
7576 if (dwarf_read_debug
)
7577 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7579 /* Sort in a separate table to maintain the order of all_type_units
7580 for .gdb_index: TU indices directly index all_type_units. */
7581 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7582 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
7584 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
7585 sorted_by_abbrev
.emplace_back
7586 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7587 sig_type
->per_cu
.section
,
7588 sig_type
->per_cu
.sect_off
));
7590 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7591 sort_tu_by_abbrev_offset
);
7593 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7595 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7597 /* Switch to the next abbrev table if necessary. */
7598 if (abbrev_table
== NULL
7599 || tu
.abbrev_offset
!= abbrev_offset
)
7601 abbrev_offset
= tu
.abbrev_offset
;
7603 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7604 &dwarf2_per_objfile
->abbrev
,
7606 ++tu_stats
->nr_uniq_abbrev_tables
;
7609 cutu_reader
reader (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
7611 if (!reader
.dummy_p
)
7612 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7613 reader
.comp_unit_die
);
7617 /* Print collected type unit statistics. */
7620 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7622 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7624 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7625 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7626 dwarf2_per_objfile
->all_type_units
.size ());
7627 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7628 tu_stats
->nr_uniq_abbrev_tables
);
7629 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7630 tu_stats
->nr_symtabs
);
7631 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7632 tu_stats
->nr_symtab_sharers
);
7633 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7634 tu_stats
->nr_stmt_less_type_units
);
7635 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7636 tu_stats
->nr_all_type_units_reallocs
);
7639 /* Traversal function for build_type_psymtabs. */
7642 build_type_psymtab_dependencies (void **slot
, void *info
)
7644 struct dwarf2_per_objfile
*dwarf2_per_objfile
7645 = (struct dwarf2_per_objfile
*) info
;
7646 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7647 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7648 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7649 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7650 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7653 gdb_assert (len
> 0);
7654 gdb_assert (per_cu
->type_unit_group_p ());
7656 pst
->number_of_dependencies
= len
;
7657 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7658 for (i
= 0; i
< len
; ++i
)
7660 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7661 gdb_assert (iter
->per_cu
.is_debug_types
);
7662 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7663 iter
->type_unit_group
= tu_group
;
7666 delete tu_group
->tus
;
7667 tu_group
->tus
= nullptr;
7672 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7673 Build partial symbol tables for the .debug_types comp-units. */
7676 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7678 if (! create_all_type_units (dwarf2_per_objfile
))
7681 build_type_psymtabs_1 (dwarf2_per_objfile
);
7684 /* Traversal function for process_skeletonless_type_unit.
7685 Read a TU in a DWO file and build partial symbols for it. */
7688 process_skeletonless_type_unit (void **slot
, void *info
)
7690 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7691 struct dwarf2_per_objfile
*dwarf2_per_objfile
7692 = (struct dwarf2_per_objfile
*) info
;
7693 struct signatured_type find_entry
, *entry
;
7695 /* If this TU doesn't exist in the global table, add it and read it in. */
7697 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7698 dwarf2_per_objfile
->signatured_types
= allocate_signatured_type_table ();
7700 find_entry
.signature
= dwo_unit
->signature
;
7701 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
.get (),
7702 &find_entry
, INSERT
);
7703 /* If we've already seen this type there's nothing to do. What's happening
7704 is we're doing our own version of comdat-folding here. */
7708 /* This does the job that create_all_type_units would have done for
7710 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7711 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7714 /* This does the job that build_type_psymtabs_1 would have done. */
7715 cutu_reader
reader (&entry
->per_cu
, NULL
, 0, false);
7716 if (!reader
.dummy_p
)
7717 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7718 reader
.comp_unit_die
);
7723 /* Traversal function for process_skeletonless_type_units. */
7726 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7728 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7730 if (dwo_file
->tus
!= NULL
)
7731 htab_traverse_noresize (dwo_file
->tus
.get (),
7732 process_skeletonless_type_unit
, info
);
7737 /* Scan all TUs of DWO files, verifying we've processed them.
7738 This is needed in case a TU was emitted without its skeleton.
7739 Note: This can't be done until we know what all the DWO files are. */
7742 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7744 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7745 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7746 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7748 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
.get (),
7749 process_dwo_file_for_skeletonless_type_units
,
7750 dwarf2_per_objfile
);
7754 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7757 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7759 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7761 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7766 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7768 /* Set the 'user' field only if it is not already set. */
7769 if (pst
->dependencies
[j
]->user
== NULL
)
7770 pst
->dependencies
[j
]->user
= pst
;
7775 /* Build the partial symbol table by doing a quick pass through the
7776 .debug_info and .debug_abbrev sections. */
7779 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7781 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7783 if (dwarf_read_debug
)
7785 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7786 objfile_name (objfile
));
7789 scoped_restore restore_reading_psyms
7790 = make_scoped_restore (&dwarf2_per_objfile
->reading_partial_symbols
,
7793 dwarf2_per_objfile
->info
.read (objfile
);
7795 /* Any cached compilation units will be linked by the per-objfile
7796 read_in_chain. Make sure to free them when we're done. */
7797 free_cached_comp_units
freer (dwarf2_per_objfile
);
7799 build_type_psymtabs (dwarf2_per_objfile
);
7801 create_all_comp_units (dwarf2_per_objfile
);
7803 /* Create a temporary address map on a temporary obstack. We later
7804 copy this to the final obstack. */
7805 auto_obstack temp_obstack
;
7807 scoped_restore save_psymtabs_addrmap
7808 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7809 addrmap_create_mutable (&temp_obstack
));
7811 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
7813 if (per_cu
->v
.psymtab
!= NULL
)
7814 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7816 process_psymtab_comp_unit (per_cu
, false, language_minimal
);
7819 /* This has to wait until we read the CUs, we need the list of DWOs. */
7820 process_skeletonless_type_units (dwarf2_per_objfile
);
7822 /* Now that all TUs have been processed we can fill in the dependencies. */
7823 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7825 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
.get (),
7826 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7829 if (dwarf_read_debug
)
7830 print_tu_stats (dwarf2_per_objfile
);
7832 set_partial_user (dwarf2_per_objfile
);
7834 objfile
->partial_symtabs
->psymtabs_addrmap
7835 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7836 objfile
->partial_symtabs
->obstack ());
7837 /* At this point we want to keep the address map. */
7838 save_psymtabs_addrmap
.release ();
7840 if (dwarf_read_debug
)
7841 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7842 objfile_name (objfile
));
7845 /* Load the partial DIEs for a secondary CU into memory.
7846 This is also used when rereading a primary CU with load_all_dies. */
7849 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7851 cutu_reader
reader (this_cu
, NULL
, 1, false);
7853 if (!reader
.dummy_p
)
7855 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
7858 /* Check if comp unit has_children.
7859 If so, read the rest of the partial symbols from this comp unit.
7860 If not, there's no more debug_info for this comp unit. */
7861 if (reader
.comp_unit_die
->has_children
)
7862 load_partial_dies (&reader
, reader
.info_ptr
, 0);
7869 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
7870 struct dwarf2_section_info
*section
,
7871 struct dwarf2_section_info
*abbrev_section
,
7872 unsigned int is_dwz
)
7874 const gdb_byte
*info_ptr
;
7875 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7877 if (dwarf_read_debug
)
7878 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7879 section
->get_name (),
7880 section
->get_file_name ());
7882 section
->read (objfile
);
7884 info_ptr
= section
->buffer
;
7886 while (info_ptr
< section
->buffer
+ section
->size
)
7888 struct dwarf2_per_cu_data
*this_cu
;
7890 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7892 comp_unit_head cu_header
;
7893 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
7894 abbrev_section
, info_ptr
,
7895 rcuh_kind::COMPILE
);
7897 /* Save the compilation unit for later lookup. */
7898 if (cu_header
.unit_type
!= DW_UT_type
)
7900 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7901 struct dwarf2_per_cu_data
);
7902 memset (this_cu
, 0, sizeof (*this_cu
));
7906 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7907 struct signatured_type
);
7908 memset (sig_type
, 0, sizeof (*sig_type
));
7909 sig_type
->signature
= cu_header
.signature
;
7910 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7911 this_cu
= &sig_type
->per_cu
;
7913 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7914 this_cu
->sect_off
= sect_off
;
7915 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7916 this_cu
->is_dwz
= is_dwz
;
7917 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7918 this_cu
->section
= section
;
7920 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
7922 info_ptr
= info_ptr
+ this_cu
->length
;
7926 /* Create a list of all compilation units in OBJFILE.
7927 This is only done for -readnow and building partial symtabs. */
7930 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7932 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
7933 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
7934 &dwarf2_per_objfile
->abbrev
, 0);
7936 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
7938 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
7942 /* Process all loaded DIEs for compilation unit CU, starting at
7943 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7944 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7945 DW_AT_ranges). See the comments of add_partial_subprogram on how
7946 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7949 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7950 CORE_ADDR
*highpc
, int set_addrmap
,
7951 struct dwarf2_cu
*cu
)
7953 struct partial_die_info
*pdi
;
7955 /* Now, march along the PDI's, descending into ones which have
7956 interesting children but skipping the children of the other ones,
7957 until we reach the end of the compilation unit. */
7965 /* Anonymous namespaces or modules have no name but have interesting
7966 children, so we need to look at them. Ditto for anonymous
7969 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7970 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7971 || pdi
->tag
== DW_TAG_imported_unit
7972 || pdi
->tag
== DW_TAG_inlined_subroutine
)
7976 case DW_TAG_subprogram
:
7977 case DW_TAG_inlined_subroutine
:
7978 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7980 case DW_TAG_constant
:
7981 case DW_TAG_variable
:
7982 case DW_TAG_typedef
:
7983 case DW_TAG_union_type
:
7984 if (!pdi
->is_declaration
7985 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
7987 add_partial_symbol (pdi
, cu
);
7990 case DW_TAG_class_type
:
7991 case DW_TAG_interface_type
:
7992 case DW_TAG_structure_type
:
7993 if (!pdi
->is_declaration
)
7995 add_partial_symbol (pdi
, cu
);
7997 if ((cu
->language
== language_rust
7998 || cu
->language
== language_cplus
) && pdi
->has_children
)
7999 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8002 case DW_TAG_enumeration_type
:
8003 if (!pdi
->is_declaration
)
8004 add_partial_enumeration (pdi
, cu
);
8006 case DW_TAG_base_type
:
8007 case DW_TAG_subrange_type
:
8008 /* File scope base type definitions are added to the partial
8010 add_partial_symbol (pdi
, cu
);
8012 case DW_TAG_namespace
:
8013 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8016 if (!pdi
->is_declaration
)
8017 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8019 case DW_TAG_imported_unit
:
8021 struct dwarf2_per_cu_data
*per_cu
;
8023 /* For now we don't handle imported units in type units. */
8024 if (cu
->per_cu
->is_debug_types
)
8026 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8027 " supported in type units [in module %s]"),
8028 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8031 per_cu
= dwarf2_find_containing_comp_unit
8032 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8033 cu
->per_cu
->dwarf2_per_objfile
);
8035 /* Go read the partial unit, if needed. */
8036 if (per_cu
->v
.psymtab
== NULL
)
8037 process_psymtab_comp_unit (per_cu
, true, cu
->language
);
8039 cu
->per_cu
->imported_symtabs_push (per_cu
);
8042 case DW_TAG_imported_declaration
:
8043 add_partial_symbol (pdi
, cu
);
8050 /* If the die has a sibling, skip to the sibling. */
8052 pdi
= pdi
->die_sibling
;
8056 /* Functions used to compute the fully scoped name of a partial DIE.
8058 Normally, this is simple. For C++, the parent DIE's fully scoped
8059 name is concatenated with "::" and the partial DIE's name.
8060 Enumerators are an exception; they use the scope of their parent
8061 enumeration type, i.e. the name of the enumeration type is not
8062 prepended to the enumerator.
8064 There are two complexities. One is DW_AT_specification; in this
8065 case "parent" means the parent of the target of the specification,
8066 instead of the direct parent of the DIE. The other is compilers
8067 which do not emit DW_TAG_namespace; in this case we try to guess
8068 the fully qualified name of structure types from their members'
8069 linkage names. This must be done using the DIE's children rather
8070 than the children of any DW_AT_specification target. We only need
8071 to do this for structures at the top level, i.e. if the target of
8072 any DW_AT_specification (if any; otherwise the DIE itself) does not
8075 /* Compute the scope prefix associated with PDI's parent, in
8076 compilation unit CU. The result will be allocated on CU's
8077 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8078 field. NULL is returned if no prefix is necessary. */
8080 partial_die_parent_scope (struct partial_die_info
*pdi
,
8081 struct dwarf2_cu
*cu
)
8083 const char *grandparent_scope
;
8084 struct partial_die_info
*parent
, *real_pdi
;
8086 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8087 then this means the parent of the specification DIE. */
8090 while (real_pdi
->has_specification
)
8092 auto res
= find_partial_die (real_pdi
->spec_offset
,
8093 real_pdi
->spec_is_dwz
, cu
);
8098 parent
= real_pdi
->die_parent
;
8102 if (parent
->scope_set
)
8103 return parent
->scope
;
8107 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8109 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8110 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8111 Work around this problem here. */
8112 if (cu
->language
== language_cplus
8113 && parent
->tag
== DW_TAG_namespace
8114 && strcmp (parent
->name
, "::") == 0
8115 && grandparent_scope
== NULL
)
8117 parent
->scope
= NULL
;
8118 parent
->scope_set
= 1;
8122 /* Nested subroutines in Fortran get a prefix. */
8123 if (pdi
->tag
== DW_TAG_enumerator
)
8124 /* Enumerators should not get the name of the enumeration as a prefix. */
8125 parent
->scope
= grandparent_scope
;
8126 else if (parent
->tag
== DW_TAG_namespace
8127 || parent
->tag
== DW_TAG_module
8128 || parent
->tag
== DW_TAG_structure_type
8129 || parent
->tag
== DW_TAG_class_type
8130 || parent
->tag
== DW_TAG_interface_type
8131 || parent
->tag
== DW_TAG_union_type
8132 || parent
->tag
== DW_TAG_enumeration_type
8133 || (cu
->language
== language_fortran
8134 && parent
->tag
== DW_TAG_subprogram
8135 && pdi
->tag
== DW_TAG_subprogram
))
8137 if (grandparent_scope
== NULL
)
8138 parent
->scope
= parent
->name
;
8140 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8142 parent
->name
, 0, cu
);
8146 /* FIXME drow/2004-04-01: What should we be doing with
8147 function-local names? For partial symbols, we should probably be
8149 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8150 dwarf_tag_name (parent
->tag
),
8151 sect_offset_str (pdi
->sect_off
));
8152 parent
->scope
= grandparent_scope
;
8155 parent
->scope_set
= 1;
8156 return parent
->scope
;
8159 /* Return the fully scoped name associated with PDI, from compilation unit
8160 CU. The result will be allocated with malloc. */
8162 static gdb::unique_xmalloc_ptr
<char>
8163 partial_die_full_name (struct partial_die_info
*pdi
,
8164 struct dwarf2_cu
*cu
)
8166 const char *parent_scope
;
8168 /* If this is a template instantiation, we can not work out the
8169 template arguments from partial DIEs. So, unfortunately, we have
8170 to go through the full DIEs. At least any work we do building
8171 types here will be reused if full symbols are loaded later. */
8172 if (pdi
->has_template_arguments
)
8176 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8178 struct die_info
*die
;
8179 struct attribute attr
;
8180 struct dwarf2_cu
*ref_cu
= cu
;
8182 /* DW_FORM_ref_addr is using section offset. */
8183 attr
.name
= (enum dwarf_attribute
) 0;
8184 attr
.form
= DW_FORM_ref_addr
;
8185 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8186 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8188 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8192 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8193 if (parent_scope
== NULL
)
8196 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8201 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8203 struct dwarf2_per_objfile
*dwarf2_per_objfile
8204 = cu
->per_cu
->dwarf2_per_objfile
;
8205 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8206 struct gdbarch
*gdbarch
= objfile
->arch ();
8208 const char *actual_name
= NULL
;
8211 baseaddr
= objfile
->text_section_offset ();
8213 gdb::unique_xmalloc_ptr
<char> built_actual_name
8214 = partial_die_full_name (pdi
, cu
);
8215 if (built_actual_name
!= NULL
)
8216 actual_name
= built_actual_name
.get ();
8218 if (actual_name
== NULL
)
8219 actual_name
= pdi
->name
;
8223 case DW_TAG_inlined_subroutine
:
8224 case DW_TAG_subprogram
:
8225 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8227 if (pdi
->is_external
8228 || cu
->language
== language_ada
8229 || (cu
->language
== language_fortran
8230 && pdi
->die_parent
!= NULL
8231 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8233 /* Normally, only "external" DIEs are part of the global scope.
8234 But in Ada and Fortran, we want to be able to access nested
8235 procedures globally. So all Ada and Fortran subprograms are
8236 stored in the global scope. */
8237 add_psymbol_to_list (actual_name
,
8238 built_actual_name
!= NULL
,
8239 VAR_DOMAIN
, LOC_BLOCK
,
8240 SECT_OFF_TEXT (objfile
),
8241 psymbol_placement::GLOBAL
,
8243 cu
->language
, objfile
);
8247 add_psymbol_to_list (actual_name
,
8248 built_actual_name
!= NULL
,
8249 VAR_DOMAIN
, LOC_BLOCK
,
8250 SECT_OFF_TEXT (objfile
),
8251 psymbol_placement::STATIC
,
8252 addr
, cu
->language
, objfile
);
8255 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8256 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8258 case DW_TAG_constant
:
8259 add_psymbol_to_list (actual_name
,
8260 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8261 -1, (pdi
->is_external
8262 ? psymbol_placement::GLOBAL
8263 : psymbol_placement::STATIC
),
8264 0, cu
->language
, objfile
);
8266 case DW_TAG_variable
:
8268 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8272 && !dwarf2_per_objfile
->has_section_at_zero
)
8274 /* A global or static variable may also have been stripped
8275 out by the linker if unused, in which case its address
8276 will be nullified; do not add such variables into partial
8277 symbol table then. */
8279 else if (pdi
->is_external
)
8282 Don't enter into the minimal symbol tables as there is
8283 a minimal symbol table entry from the ELF symbols already.
8284 Enter into partial symbol table if it has a location
8285 descriptor or a type.
8286 If the location descriptor is missing, new_symbol will create
8287 a LOC_UNRESOLVED symbol, the address of the variable will then
8288 be determined from the minimal symbol table whenever the variable
8290 The address for the partial symbol table entry is not
8291 used by GDB, but it comes in handy for debugging partial symbol
8294 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8295 add_psymbol_to_list (actual_name
,
8296 built_actual_name
!= NULL
,
8297 VAR_DOMAIN
, LOC_STATIC
,
8298 SECT_OFF_TEXT (objfile
),
8299 psymbol_placement::GLOBAL
,
8300 addr
, cu
->language
, objfile
);
8304 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8306 /* Static Variable. Skip symbols whose value we cannot know (those
8307 without location descriptors or constant values). */
8308 if (!has_loc
&& !pdi
->has_const_value
)
8311 add_psymbol_to_list (actual_name
,
8312 built_actual_name
!= NULL
,
8313 VAR_DOMAIN
, LOC_STATIC
,
8314 SECT_OFF_TEXT (objfile
),
8315 psymbol_placement::STATIC
,
8317 cu
->language
, objfile
);
8320 case DW_TAG_typedef
:
8321 case DW_TAG_base_type
:
8322 case DW_TAG_subrange_type
:
8323 add_psymbol_to_list (actual_name
,
8324 built_actual_name
!= NULL
,
8325 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8326 psymbol_placement::STATIC
,
8327 0, cu
->language
, objfile
);
8329 case DW_TAG_imported_declaration
:
8330 case DW_TAG_namespace
:
8331 add_psymbol_to_list (actual_name
,
8332 built_actual_name
!= NULL
,
8333 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8334 psymbol_placement::GLOBAL
,
8335 0, cu
->language
, objfile
);
8338 /* With Fortran 77 there might be a "BLOCK DATA" module
8339 available without any name. If so, we skip the module as it
8340 doesn't bring any value. */
8341 if (actual_name
!= nullptr)
8342 add_psymbol_to_list (actual_name
,
8343 built_actual_name
!= NULL
,
8344 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8345 psymbol_placement::GLOBAL
,
8346 0, cu
->language
, objfile
);
8348 case DW_TAG_class_type
:
8349 case DW_TAG_interface_type
:
8350 case DW_TAG_structure_type
:
8351 case DW_TAG_union_type
:
8352 case DW_TAG_enumeration_type
:
8353 /* Skip external references. The DWARF standard says in the section
8354 about "Structure, Union, and Class Type Entries": "An incomplete
8355 structure, union or class type is represented by a structure,
8356 union or class entry that does not have a byte size attribute
8357 and that has a DW_AT_declaration attribute." */
8358 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8361 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8362 static vs. global. */
8363 add_psymbol_to_list (actual_name
,
8364 built_actual_name
!= NULL
,
8365 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
8366 cu
->language
== language_cplus
8367 ? psymbol_placement::GLOBAL
8368 : psymbol_placement::STATIC
,
8369 0, cu
->language
, objfile
);
8372 case DW_TAG_enumerator
:
8373 add_psymbol_to_list (actual_name
,
8374 built_actual_name
!= NULL
,
8375 VAR_DOMAIN
, LOC_CONST
, -1,
8376 cu
->language
== language_cplus
8377 ? psymbol_placement::GLOBAL
8378 : psymbol_placement::STATIC
,
8379 0, cu
->language
, objfile
);
8386 /* Read a partial die corresponding to a namespace; also, add a symbol
8387 corresponding to that namespace to the symbol table. NAMESPACE is
8388 the name of the enclosing namespace. */
8391 add_partial_namespace (struct partial_die_info
*pdi
,
8392 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8393 int set_addrmap
, struct dwarf2_cu
*cu
)
8395 /* Add a symbol for the namespace. */
8397 add_partial_symbol (pdi
, cu
);
8399 /* Now scan partial symbols in that namespace. */
8401 if (pdi
->has_children
)
8402 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8405 /* Read a partial die corresponding to a Fortran module. */
8408 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8409 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8411 /* Add a symbol for the namespace. */
8413 add_partial_symbol (pdi
, cu
);
8415 /* Now scan partial symbols in that module. */
8417 if (pdi
->has_children
)
8418 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8421 /* Read a partial die corresponding to a subprogram or an inlined
8422 subprogram and create a partial symbol for that subprogram.
8423 When the CU language allows it, this routine also defines a partial
8424 symbol for each nested subprogram that this subprogram contains.
8425 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8426 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8428 PDI may also be a lexical block, in which case we simply search
8429 recursively for subprograms defined inside that lexical block.
8430 Again, this is only performed when the CU language allows this
8431 type of definitions. */
8434 add_partial_subprogram (struct partial_die_info
*pdi
,
8435 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8436 int set_addrmap
, struct dwarf2_cu
*cu
)
8438 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8440 if (pdi
->has_pc_info
)
8442 if (pdi
->lowpc
< *lowpc
)
8443 *lowpc
= pdi
->lowpc
;
8444 if (pdi
->highpc
> *highpc
)
8445 *highpc
= pdi
->highpc
;
8448 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
8449 struct gdbarch
*gdbarch
= objfile
->arch ();
8451 CORE_ADDR this_highpc
;
8452 CORE_ADDR this_lowpc
;
8454 baseaddr
= objfile
->text_section_offset ();
8456 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8457 pdi
->lowpc
+ baseaddr
)
8460 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8461 pdi
->highpc
+ baseaddr
)
8463 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8464 this_lowpc
, this_highpc
- 1,
8465 cu
->per_cu
->v
.psymtab
);
8469 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8471 if (!pdi
->is_declaration
)
8472 /* Ignore subprogram DIEs that do not have a name, they are
8473 illegal. Do not emit a complaint at this point, we will
8474 do so when we convert this psymtab into a symtab. */
8476 add_partial_symbol (pdi
, cu
);
8480 if (! pdi
->has_children
)
8483 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8485 pdi
= pdi
->die_child
;
8489 if (pdi
->tag
== DW_TAG_subprogram
8490 || pdi
->tag
== DW_TAG_inlined_subroutine
8491 || pdi
->tag
== DW_TAG_lexical_block
)
8492 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8493 pdi
= pdi
->die_sibling
;
8498 /* Read a partial die corresponding to an enumeration type. */
8501 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8502 struct dwarf2_cu
*cu
)
8504 struct partial_die_info
*pdi
;
8506 if (enum_pdi
->name
!= NULL
)
8507 add_partial_symbol (enum_pdi
, cu
);
8509 pdi
= enum_pdi
->die_child
;
8512 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8513 complaint (_("malformed enumerator DIE ignored"));
8515 add_partial_symbol (pdi
, cu
);
8516 pdi
= pdi
->die_sibling
;
8520 /* Return the initial uleb128 in the die at INFO_PTR. */
8523 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8525 unsigned int bytes_read
;
8527 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8530 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8531 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8533 Return the corresponding abbrev, or NULL if the number is zero (indicating
8534 an empty DIE). In either case *BYTES_READ will be set to the length of
8535 the initial number. */
8537 static struct abbrev_info
*
8538 peek_die_abbrev (const die_reader_specs
&reader
,
8539 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8541 dwarf2_cu
*cu
= reader
.cu
;
8542 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
8543 unsigned int abbrev_number
8544 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8546 if (abbrev_number
== 0)
8549 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8552 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8553 " at offset %s [in module %s]"),
8554 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8555 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8561 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8562 Returns a pointer to the end of a series of DIEs, terminated by an empty
8563 DIE. Any children of the skipped DIEs will also be skipped. */
8565 static const gdb_byte
*
8566 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8570 unsigned int bytes_read
;
8571 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8574 return info_ptr
+ bytes_read
;
8576 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8580 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8581 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8582 abbrev corresponding to that skipped uleb128 should be passed in
8583 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8586 static const gdb_byte
*
8587 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8588 struct abbrev_info
*abbrev
)
8590 unsigned int bytes_read
;
8591 struct attribute attr
;
8592 bfd
*abfd
= reader
->abfd
;
8593 struct dwarf2_cu
*cu
= reader
->cu
;
8594 const gdb_byte
*buffer
= reader
->buffer
;
8595 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8596 unsigned int form
, i
;
8598 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8600 /* The only abbrev we care about is DW_AT_sibling. */
8601 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8604 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8606 if (attr
.form
== DW_FORM_ref_addr
)
8607 complaint (_("ignoring absolute DW_AT_sibling"));
8610 sect_offset off
= attr
.get_ref_die_offset ();
8611 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8613 if (sibling_ptr
< info_ptr
)
8614 complaint (_("DW_AT_sibling points backwards"));
8615 else if (sibling_ptr
> reader
->buffer_end
)
8616 reader
->die_section
->overflow_complaint ();
8622 /* If it isn't DW_AT_sibling, skip this attribute. */
8623 form
= abbrev
->attrs
[i
].form
;
8627 case DW_FORM_ref_addr
:
8628 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8629 and later it is offset sized. */
8630 if (cu
->header
.version
== 2)
8631 info_ptr
+= cu
->header
.addr_size
;
8633 info_ptr
+= cu
->header
.offset_size
;
8635 case DW_FORM_GNU_ref_alt
:
8636 info_ptr
+= cu
->header
.offset_size
;
8639 info_ptr
+= cu
->header
.addr_size
;
8647 case DW_FORM_flag_present
:
8648 case DW_FORM_implicit_const
:
8665 case DW_FORM_ref_sig8
:
8668 case DW_FORM_data16
:
8671 case DW_FORM_string
:
8672 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8673 info_ptr
+= bytes_read
;
8675 case DW_FORM_sec_offset
:
8677 case DW_FORM_GNU_strp_alt
:
8678 info_ptr
+= cu
->header
.offset_size
;
8680 case DW_FORM_exprloc
:
8682 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8683 info_ptr
+= bytes_read
;
8685 case DW_FORM_block1
:
8686 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8688 case DW_FORM_block2
:
8689 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8691 case DW_FORM_block4
:
8692 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8698 case DW_FORM_ref_udata
:
8699 case DW_FORM_GNU_addr_index
:
8700 case DW_FORM_GNU_str_index
:
8701 case DW_FORM_rnglistx
:
8702 case DW_FORM_loclistx
:
8703 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8705 case DW_FORM_indirect
:
8706 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8707 info_ptr
+= bytes_read
;
8708 /* We need to continue parsing from here, so just go back to
8710 goto skip_attribute
;
8713 error (_("Dwarf Error: Cannot handle %s "
8714 "in DWARF reader [in module %s]"),
8715 dwarf_form_name (form
),
8716 bfd_get_filename (abfd
));
8720 if (abbrev
->has_children
)
8721 return skip_children (reader
, info_ptr
);
8726 /* Locate ORIG_PDI's sibling.
8727 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8729 static const gdb_byte
*
8730 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8731 struct partial_die_info
*orig_pdi
,
8732 const gdb_byte
*info_ptr
)
8734 /* Do we know the sibling already? */
8736 if (orig_pdi
->sibling
)
8737 return orig_pdi
->sibling
;
8739 /* Are there any children to deal with? */
8741 if (!orig_pdi
->has_children
)
8744 /* Skip the children the long way. */
8746 return skip_children (reader
, info_ptr
);
8749 /* Expand this partial symbol table into a full symbol table. SELF is
8753 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8755 struct dwarf2_per_objfile
*dwarf2_per_objfile
8756 = get_dwarf2_per_objfile (objfile
);
8758 gdb_assert (!readin
);
8759 /* If this psymtab is constructed from a debug-only objfile, the
8760 has_section_at_zero flag will not necessarily be correct. We
8761 can get the correct value for this flag by looking at the data
8762 associated with the (presumably stripped) associated objfile. */
8763 if (objfile
->separate_debug_objfile_backlink
)
8765 struct dwarf2_per_objfile
*dpo_backlink
8766 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8768 dwarf2_per_objfile
->has_section_at_zero
8769 = dpo_backlink
->has_section_at_zero
;
8772 expand_psymtab (objfile
);
8774 process_cu_includes (dwarf2_per_objfile
);
8777 /* Reading in full CUs. */
8779 /* Add PER_CU to the queue. */
8782 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8783 enum language pretend_language
)
8786 per_cu
->dwarf2_per_objfile
->queue
.emplace (per_cu
, pretend_language
);
8789 /* If PER_CU is not yet queued, add it to the queue.
8790 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8792 The result is non-zero if PER_CU was queued, otherwise the result is zero
8793 meaning either PER_CU is already queued or it is already loaded.
8795 N.B. There is an invariant here that if a CU is queued then it is loaded.
8796 The caller is required to load PER_CU if we return non-zero. */
8799 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8800 struct dwarf2_per_cu_data
*per_cu
,
8801 enum language pretend_language
)
8803 /* We may arrive here during partial symbol reading, if we need full
8804 DIEs to process an unusual case (e.g. template arguments). Do
8805 not queue PER_CU, just tell our caller to load its DIEs. */
8806 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
8808 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8813 /* Mark the dependence relation so that we don't flush PER_CU
8815 if (dependent_cu
!= NULL
)
8816 dwarf2_add_dependence (dependent_cu
, per_cu
);
8818 /* If it's already on the queue, we have nothing to do. */
8822 /* If the compilation unit is already loaded, just mark it as
8824 if (per_cu
->cu
!= NULL
)
8826 per_cu
->cu
->last_used
= 0;
8830 /* Add it to the queue. */
8831 queue_comp_unit (per_cu
, pretend_language
);
8836 /* Process the queue. */
8839 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8841 if (dwarf_read_debug
)
8843 fprintf_unfiltered (gdb_stdlog
,
8844 "Expanding one or more symtabs of objfile %s ...\n",
8845 objfile_name (dwarf2_per_objfile
->objfile
));
8848 /* The queue starts out with one item, but following a DIE reference
8849 may load a new CU, adding it to the end of the queue. */
8850 while (!dwarf2_per_objfile
->queue
.empty ())
8852 dwarf2_queue_item
&item
= dwarf2_per_objfile
->queue
.front ();
8854 if ((dwarf2_per_objfile
->using_index
8855 ? !item
.per_cu
->v
.quick
->compunit_symtab
8856 : (item
.per_cu
->v
.psymtab
&& !item
.per_cu
->v
.psymtab
->readin
))
8857 /* Skip dummy CUs. */
8858 && item
.per_cu
->cu
!= NULL
)
8860 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
8861 unsigned int debug_print_threshold
;
8864 if (per_cu
->is_debug_types
)
8866 struct signatured_type
*sig_type
=
8867 (struct signatured_type
*) per_cu
;
8869 sprintf (buf
, "TU %s at offset %s",
8870 hex_string (sig_type
->signature
),
8871 sect_offset_str (per_cu
->sect_off
));
8872 /* There can be 100s of TUs.
8873 Only print them in verbose mode. */
8874 debug_print_threshold
= 2;
8878 sprintf (buf
, "CU at offset %s",
8879 sect_offset_str (per_cu
->sect_off
));
8880 debug_print_threshold
= 1;
8883 if (dwarf_read_debug
>= debug_print_threshold
)
8884 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8886 if (per_cu
->is_debug_types
)
8887 process_full_type_unit (per_cu
, item
.pretend_language
);
8889 process_full_comp_unit (per_cu
, item
.pretend_language
);
8891 if (dwarf_read_debug
>= debug_print_threshold
)
8892 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8895 item
.per_cu
->queued
= 0;
8896 dwarf2_per_objfile
->queue
.pop ();
8899 if (dwarf_read_debug
)
8901 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8902 objfile_name (dwarf2_per_objfile
->objfile
));
8906 /* Read in full symbols for PST, and anything it depends on. */
8909 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
8911 gdb_assert (!readin
);
8913 expand_dependencies (objfile
);
8915 dw2_do_instantiate_symtab (per_cu_data
, false);
8916 gdb_assert (get_compunit_symtab () != nullptr);
8919 /* Trivial hash function for die_info: the hash value of a DIE
8920 is its offset in .debug_info for this objfile. */
8923 die_hash (const void *item
)
8925 const struct die_info
*die
= (const struct die_info
*) item
;
8927 return to_underlying (die
->sect_off
);
8930 /* Trivial comparison function for die_info structures: two DIEs
8931 are equal if they have the same offset. */
8934 die_eq (const void *item_lhs
, const void *item_rhs
)
8936 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8937 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8939 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8942 /* Load the DIEs associated with PER_CU into memory. */
8945 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8947 enum language pretend_language
)
8949 gdb_assert (! this_cu
->is_debug_types
);
8951 cutu_reader
reader (this_cu
, NULL
, 1, skip_partial
);
8955 struct dwarf2_cu
*cu
= reader
.cu
;
8956 const gdb_byte
*info_ptr
= reader
.info_ptr
;
8958 gdb_assert (cu
->die_hash
== NULL
);
8960 htab_create_alloc_ex (cu
->header
.length
/ 12,
8964 &cu
->comp_unit_obstack
,
8965 hashtab_obstack_allocate
,
8966 dummy_obstack_deallocate
);
8968 if (reader
.comp_unit_die
->has_children
)
8969 reader
.comp_unit_die
->child
8970 = read_die_and_siblings (&reader
, reader
.info_ptr
,
8971 &info_ptr
, reader
.comp_unit_die
);
8972 cu
->dies
= reader
.comp_unit_die
;
8973 /* comp_unit_die is not stored in die_hash, no need. */
8975 /* We try not to read any attributes in this function, because not
8976 all CUs needed for references have been loaded yet, and symbol
8977 table processing isn't initialized. But we have to set the CU language,
8978 or we won't be able to build types correctly.
8979 Similarly, if we do not read the producer, we can not apply
8980 producer-specific interpretation. */
8981 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
8986 /* Add a DIE to the delayed physname list. */
8989 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8990 const char *name
, struct die_info
*die
,
8991 struct dwarf2_cu
*cu
)
8993 struct delayed_method_info mi
;
8995 mi
.fnfield_index
= fnfield_index
;
8999 cu
->method_list
.push_back (mi
);
9002 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9003 "const" / "volatile". If so, decrements LEN by the length of the
9004 modifier and return true. Otherwise return false. */
9008 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9010 size_t mod_len
= sizeof (mod
) - 1;
9011 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9019 /* Compute the physnames of any methods on the CU's method list.
9021 The computation of method physnames is delayed in order to avoid the
9022 (bad) condition that one of the method's formal parameters is of an as yet
9026 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9028 /* Only C++ delays computing physnames. */
9029 if (cu
->method_list
.empty ())
9031 gdb_assert (cu
->language
== language_cplus
);
9033 for (const delayed_method_info
&mi
: cu
->method_list
)
9035 const char *physname
;
9036 struct fn_fieldlist
*fn_flp
9037 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9038 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9039 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9040 = physname
? physname
: "";
9042 /* Since there's no tag to indicate whether a method is a
9043 const/volatile overload, extract that information out of the
9045 if (physname
!= NULL
)
9047 size_t len
= strlen (physname
);
9051 if (physname
[len
] == ')') /* shortcut */
9053 else if (check_modifier (physname
, len
, " const"))
9054 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9055 else if (check_modifier (physname
, len
, " volatile"))
9056 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9063 /* The list is no longer needed. */
9064 cu
->method_list
.clear ();
9067 /* Go objects should be embedded in a DW_TAG_module DIE,
9068 and it's not clear if/how imported objects will appear.
9069 To keep Go support simple until that's worked out,
9070 go back through what we've read and create something usable.
9071 We could do this while processing each DIE, and feels kinda cleaner,
9072 but that way is more invasive.
9073 This is to, for example, allow the user to type "p var" or "b main"
9074 without having to specify the package name, and allow lookups
9075 of module.object to work in contexts that use the expression
9079 fixup_go_packaging (struct dwarf2_cu
*cu
)
9081 gdb::unique_xmalloc_ptr
<char> package_name
;
9082 struct pending
*list
;
9085 for (list
= *cu
->get_builder ()->get_global_symbols ();
9089 for (i
= 0; i
< list
->nsyms
; ++i
)
9091 struct symbol
*sym
= list
->symbol
[i
];
9093 if (sym
->language () == language_go
9094 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9096 gdb::unique_xmalloc_ptr
<char> this_package_name
9097 (go_symbol_package_name (sym
));
9099 if (this_package_name
== NULL
)
9101 if (package_name
== NULL
)
9102 package_name
= std::move (this_package_name
);
9105 struct objfile
*objfile
9106 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9107 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9108 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9109 (symbol_symtab (sym
) != NULL
9110 ? symtab_to_filename_for_display
9111 (symbol_symtab (sym
))
9112 : objfile_name (objfile
)),
9113 this_package_name
.get (), package_name
.get ());
9119 if (package_name
!= NULL
)
9121 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9122 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9123 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9124 saved_package_name
);
9127 sym
= allocate_symbol (objfile
);
9128 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9129 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9130 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9131 e.g., "main" finds the "main" module and not C's main(). */
9132 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9133 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9134 SYMBOL_TYPE (sym
) = type
;
9136 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9140 /* Allocate a fully-qualified name consisting of the two parts on the
9144 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9146 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9149 /* A helper that allocates a variant part to attach to a Rust enum
9150 type. OBSTACK is where the results should be allocated. TYPE is
9151 the type we're processing. DISCRIMINANT_INDEX is the index of the
9152 discriminant. It must be the index of one of the fields of TYPE.
9153 DEFAULT_INDEX is the index of the default field; or -1 if there is
9154 no default. RANGES is indexed by "effective" field number (the
9155 field index, but omitting the discriminant and default fields) and
9156 must hold the discriminant values used by the variants. Note that
9157 RANGES must have a lifetime at least as long as OBSTACK -- either
9158 already allocated on it, or static. */
9161 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9162 int discriminant_index
, int default_index
,
9163 gdb::array_view
<discriminant_range
> ranges
)
9165 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9166 must be handled by the caller. */
9167 gdb_assert (discriminant_index
>= 0
9168 && discriminant_index
< TYPE_NFIELDS (type
));
9169 gdb_assert (default_index
== -1
9170 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9172 /* We have one variant for each non-discriminant field. */
9173 int n_variants
= TYPE_NFIELDS (type
) - 1;
9175 variant
*variants
= new (obstack
) variant
[n_variants
];
9178 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9180 if (i
== discriminant_index
)
9183 variants
[var_idx
].first_field
= i
;
9184 variants
[var_idx
].last_field
= i
+ 1;
9186 /* The default field does not need a range, but other fields do.
9187 We skipped the discriminant above. */
9188 if (i
!= default_index
)
9190 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9197 gdb_assert (range_idx
== ranges
.size ());
9198 gdb_assert (var_idx
== n_variants
);
9200 variant_part
*part
= new (obstack
) variant_part
;
9201 part
->discriminant_index
= discriminant_index
;
9202 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9203 discriminant_index
));
9204 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9206 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9207 gdb::array_view
<variant_part
> *prop_value
9208 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9210 struct dynamic_prop prop
;
9211 prop
.kind
= PROP_VARIANT_PARTS
;
9212 prop
.data
.variant_parts
= prop_value
;
9214 add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
, type
);
9217 /* Some versions of rustc emitted enums in an unusual way.
9219 Ordinary enums were emitted as unions. The first element of each
9220 structure in the union was named "RUST$ENUM$DISR". This element
9221 held the discriminant.
9223 These versions of Rust also implemented the "non-zero"
9224 optimization. When the enum had two values, and one is empty and
9225 the other holds a pointer that cannot be zero, the pointer is used
9226 as the discriminant, with a zero value meaning the empty variant.
9227 Here, the union's first member is of the form
9228 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9229 where the fieldnos are the indices of the fields that should be
9230 traversed in order to find the field (which may be several fields deep)
9231 and the variantname is the name of the variant of the case when the
9234 This function recognizes whether TYPE is of one of these forms,
9235 and, if so, smashes it to be a variant type. */
9238 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9240 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9242 /* We don't need to deal with empty enums. */
9243 if (TYPE_NFIELDS (type
) == 0)
9246 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9247 if (TYPE_NFIELDS (type
) == 1
9248 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9250 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9252 /* Decode the field name to find the offset of the
9254 ULONGEST bit_offset
= 0;
9255 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9256 while (name
[0] >= '0' && name
[0] <= '9')
9259 unsigned long index
= strtoul (name
, &tail
, 10);
9262 || index
>= TYPE_NFIELDS (field_type
)
9263 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9264 != FIELD_LOC_KIND_BITPOS
))
9266 complaint (_("Could not parse Rust enum encoding string \"%s\""
9268 TYPE_FIELD_NAME (type
, 0),
9269 objfile_name (objfile
));
9274 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9275 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9278 /* Smash this type to be a structure type. We have to do this
9279 because the type has already been recorded. */
9280 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9281 TYPE_NFIELDS (type
) = 3;
9282 /* Save the field we care about. */
9283 struct field saved_field
= TYPE_FIELD (type
, 0);
9285 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9287 /* Put the discriminant at index 0. */
9288 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9289 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9290 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9291 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), bit_offset
);
9293 /* The order of fields doesn't really matter, so put the real
9294 field at index 1 and the data-less field at index 2. */
9295 TYPE_FIELD (type
, 1) = saved_field
;
9296 TYPE_FIELD_NAME (type
, 1)
9297 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, 1)));
9298 TYPE_NAME (TYPE_FIELD_TYPE (type
, 1))
9299 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9300 TYPE_FIELD_NAME (type
, 1));
9302 const char *dataless_name
9303 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9305 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9307 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9308 /* NAME points into the original discriminant name, which
9309 already has the correct lifetime. */
9310 TYPE_FIELD_NAME (type
, 2) = name
;
9311 SET_FIELD_BITPOS (TYPE_FIELD (type
, 2), 0);
9313 /* Indicate that this is a variant type. */
9314 static discriminant_range ranges
[1] = { { 0, 0 } };
9315 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9317 /* A union with a single anonymous field is probably an old-style
9319 else if (TYPE_NFIELDS (type
) == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9321 /* Smash this type to be a structure type. We have to do this
9322 because the type has already been recorded. */
9323 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9325 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9326 const char *variant_name
9327 = rust_last_path_segment (TYPE_NAME (field_type
));
9328 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9329 TYPE_NAME (field_type
)
9330 = rust_fully_qualify (&objfile
->objfile_obstack
,
9331 TYPE_NAME (type
), variant_name
);
9335 struct type
*disr_type
= nullptr;
9336 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9338 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9340 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9342 /* All fields of a true enum will be structs. */
9345 else if (TYPE_NFIELDS (disr_type
) == 0)
9347 /* Could be data-less variant, so keep going. */
9348 disr_type
= nullptr;
9350 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9351 "RUST$ENUM$DISR") != 0)
9353 /* Not a Rust enum. */
9363 /* If we got here without a discriminant, then it's probably
9365 if (disr_type
== nullptr)
9368 /* Smash this type to be a structure type. We have to do this
9369 because the type has already been recorded. */
9370 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9372 /* Make space for the discriminant field. */
9373 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
9375 = (struct field
*) TYPE_ZALLOC (type
, (TYPE_NFIELDS (type
)
9376 * sizeof (struct field
)));
9377 memcpy (new_fields
+ 1, TYPE_FIELDS (type
),
9378 TYPE_NFIELDS (type
) * sizeof (struct field
));
9379 TYPE_FIELDS (type
) = new_fields
;
9380 TYPE_NFIELDS (type
) = TYPE_NFIELDS (type
) + 1;
9382 /* Install the discriminant at index 0 in the union. */
9383 TYPE_FIELD (type
, 0) = *disr_field
;
9384 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9385 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9387 /* We need a way to find the correct discriminant given a
9388 variant name. For convenience we build a map here. */
9389 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9390 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9391 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
9393 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9396 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9397 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9401 int n_fields
= TYPE_NFIELDS (type
);
9402 /* We don't need a range entry for the discriminant, but we do
9403 need one for every other field, as there is no default
9405 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9408 /* Skip the discriminant here. */
9409 for (int i
= 1; i
< n_fields
; ++i
)
9411 /* Find the final word in the name of this variant's type.
9412 That name can be used to look up the correct
9414 const char *variant_name
9415 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type
, i
)));
9417 auto iter
= discriminant_map
.find (variant_name
);
9418 if (iter
!= discriminant_map
.end ())
9420 ranges
[i
].low
= iter
->second
;
9421 ranges
[i
].high
= iter
->second
;
9424 /* Remove the discriminant field, if it exists. */
9425 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9426 if (TYPE_NFIELDS (sub_type
) > 0)
9428 --TYPE_NFIELDS (sub_type
);
9429 ++TYPE_FIELDS (sub_type
);
9431 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9432 TYPE_NAME (sub_type
)
9433 = rust_fully_qualify (&objfile
->objfile_obstack
,
9434 TYPE_NAME (type
), variant_name
);
9437 /* Indicate that this is a variant type. */
9438 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9439 gdb::array_view
<discriminant_range
> (ranges
,
9444 /* Rewrite some Rust unions to be structures with variants parts. */
9447 rust_union_quirks (struct dwarf2_cu
*cu
)
9449 gdb_assert (cu
->language
== language_rust
);
9450 for (type
*type_
: cu
->rust_unions
)
9451 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
9452 /* We don't need this any more. */
9453 cu
->rust_unions
.clear ();
9456 /* Return the symtab for PER_CU. This works properly regardless of
9457 whether we're using the index or psymtabs. */
9459 static struct compunit_symtab
*
9460 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
9462 return (per_cu
->dwarf2_per_objfile
->using_index
9463 ? per_cu
->v
.quick
->compunit_symtab
9464 : per_cu
->v
.psymtab
->compunit_symtab
);
9467 /* A helper function for computing the list of all symbol tables
9468 included by PER_CU. */
9471 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9472 htab_t all_children
, htab_t all_type_symtabs
,
9473 struct dwarf2_per_cu_data
*per_cu
,
9474 struct compunit_symtab
*immediate_parent
)
9477 struct compunit_symtab
*cust
;
9479 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9482 /* This inclusion and its children have been processed. */
9487 /* Only add a CU if it has a symbol table. */
9488 cust
= get_compunit_symtab (per_cu
);
9491 /* If this is a type unit only add its symbol table if we haven't
9492 seen it yet (type unit per_cu's can share symtabs). */
9493 if (per_cu
->is_debug_types
)
9495 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9499 result
->push_back (cust
);
9500 if (cust
->user
== NULL
)
9501 cust
->user
= immediate_parent
;
9506 result
->push_back (cust
);
9507 if (cust
->user
== NULL
)
9508 cust
->user
= immediate_parent
;
9512 if (!per_cu
->imported_symtabs_empty ())
9513 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9515 recursively_compute_inclusions (result
, all_children
,
9516 all_type_symtabs
, ptr
, cust
);
9520 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9524 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9526 gdb_assert (! per_cu
->is_debug_types
);
9528 if (!per_cu
->imported_symtabs_empty ())
9531 std::vector
<compunit_symtab
*> result_symtabs
;
9532 htab_t all_children
, all_type_symtabs
;
9533 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
9535 /* If we don't have a symtab, we can just skip this case. */
9539 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9540 NULL
, xcalloc
, xfree
);
9541 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9542 NULL
, xcalloc
, xfree
);
9544 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9546 recursively_compute_inclusions (&result_symtabs
, all_children
,
9547 all_type_symtabs
, ptr
, cust
);
9550 /* Now we have a transitive closure of all the included symtabs. */
9551 len
= result_symtabs
.size ();
9553 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9554 struct compunit_symtab
*, len
+ 1);
9555 memcpy (cust
->includes
, result_symtabs
.data (),
9556 len
* sizeof (compunit_symtab
*));
9557 cust
->includes
[len
] = NULL
;
9559 htab_delete (all_children
);
9560 htab_delete (all_type_symtabs
);
9564 /* Compute the 'includes' field for the symtabs of all the CUs we just
9568 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9570 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
9572 if (! iter
->is_debug_types
)
9573 compute_compunit_symtab_includes (iter
);
9576 dwarf2_per_objfile
->just_read_cus
.clear ();
9579 /* Generate full symbol information for PER_CU, whose DIEs have
9580 already been loaded into memory. */
9583 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9584 enum language pretend_language
)
9586 struct dwarf2_cu
*cu
= per_cu
->cu
;
9587 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9588 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9589 struct gdbarch
*gdbarch
= objfile
->arch ();
9590 CORE_ADDR lowpc
, highpc
;
9591 struct compunit_symtab
*cust
;
9593 struct block
*static_block
;
9596 baseaddr
= objfile
->text_section_offset ();
9598 /* Clear the list here in case something was left over. */
9599 cu
->method_list
.clear ();
9601 cu
->language
= pretend_language
;
9602 cu
->language_defn
= language_def (cu
->language
);
9604 /* Do line number decoding in read_file_scope () */
9605 process_die (cu
->dies
, cu
);
9607 /* For now fudge the Go package. */
9608 if (cu
->language
== language_go
)
9609 fixup_go_packaging (cu
);
9611 /* Now that we have processed all the DIEs in the CU, all the types
9612 should be complete, and it should now be safe to compute all of the
9614 compute_delayed_physnames (cu
);
9616 if (cu
->language
== language_rust
)
9617 rust_union_quirks (cu
);
9619 /* Some compilers don't define a DW_AT_high_pc attribute for the
9620 compilation unit. If the DW_AT_high_pc is missing, synthesize
9621 it, by scanning the DIE's below the compilation unit. */
9622 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9624 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9625 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9627 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9628 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9629 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9630 addrmap to help ensure it has an accurate map of pc values belonging to
9632 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9634 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9635 SECT_OFF_TEXT (objfile
),
9640 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9642 /* Set symtab language to language from DW_AT_language. If the
9643 compilation is from a C file generated by language preprocessors, do
9644 not set the language if it was already deduced by start_subfile. */
9645 if (!(cu
->language
== language_c
9646 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9647 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9649 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9650 produce DW_AT_location with location lists but it can be possibly
9651 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9652 there were bugs in prologue debug info, fixed later in GCC-4.5
9653 by "unwind info for epilogues" patch (which is not directly related).
9655 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9656 needed, it would be wrong due to missing DW_AT_producer there.
9658 Still one can confuse GDB by using non-standard GCC compilation
9659 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9661 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9662 cust
->locations_valid
= 1;
9664 if (gcc_4_minor
>= 5)
9665 cust
->epilogue_unwind_valid
= 1;
9667 cust
->call_site_htab
= cu
->call_site_htab
;
9670 if (dwarf2_per_objfile
->using_index
)
9671 per_cu
->v
.quick
->compunit_symtab
= cust
;
9674 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9675 pst
->compunit_symtab
= cust
;
9679 /* Push it for inclusion processing later. */
9680 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
9682 /* Not needed any more. */
9683 cu
->reset_builder ();
9686 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9687 already been loaded into memory. */
9690 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9691 enum language pretend_language
)
9693 struct dwarf2_cu
*cu
= per_cu
->cu
;
9694 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9695 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9696 struct compunit_symtab
*cust
;
9697 struct signatured_type
*sig_type
;
9699 gdb_assert (per_cu
->is_debug_types
);
9700 sig_type
= (struct signatured_type
*) per_cu
;
9702 /* Clear the list here in case something was left over. */
9703 cu
->method_list
.clear ();
9705 cu
->language
= pretend_language
;
9706 cu
->language_defn
= language_def (cu
->language
);
9708 /* The symbol tables are set up in read_type_unit_scope. */
9709 process_die (cu
->dies
, cu
);
9711 /* For now fudge the Go package. */
9712 if (cu
->language
== language_go
)
9713 fixup_go_packaging (cu
);
9715 /* Now that we have processed all the DIEs in the CU, all the types
9716 should be complete, and it should now be safe to compute all of the
9718 compute_delayed_physnames (cu
);
9720 if (cu
->language
== language_rust
)
9721 rust_union_quirks (cu
);
9723 /* TUs share symbol tables.
9724 If this is the first TU to use this symtab, complete the construction
9725 of it with end_expandable_symtab. Otherwise, complete the addition of
9726 this TU's symbols to the existing symtab. */
9727 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9729 buildsym_compunit
*builder
= cu
->get_builder ();
9730 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9731 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9735 /* Set symtab language to language from DW_AT_language. If the
9736 compilation is from a C file generated by language preprocessors,
9737 do not set the language if it was already deduced by
9739 if (!(cu
->language
== language_c
9740 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9741 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9746 cu
->get_builder ()->augment_type_symtab ();
9747 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9750 if (dwarf2_per_objfile
->using_index
)
9751 per_cu
->v
.quick
->compunit_symtab
= cust
;
9754 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
9755 pst
->compunit_symtab
= cust
;
9759 /* Not needed any more. */
9760 cu
->reset_builder ();
9763 /* Process an imported unit DIE. */
9766 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9768 struct attribute
*attr
;
9770 /* For now we don't handle imported units in type units. */
9771 if (cu
->per_cu
->is_debug_types
)
9773 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9774 " supported in type units [in module %s]"),
9775 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
9778 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9781 sect_offset sect_off
= attr
->get_ref_die_offset ();
9782 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9783 dwarf2_per_cu_data
*per_cu
9784 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
9785 cu
->per_cu
->dwarf2_per_objfile
);
9787 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9788 into another compilation unit, at root level. Regard this as a hint,
9790 if (die
->parent
&& die
->parent
->parent
== NULL
9791 && per_cu
->unit_type
== DW_UT_compile
9792 && per_cu
->lang
== language_cplus
)
9795 /* If necessary, add it to the queue and load its DIEs. */
9796 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9797 load_full_comp_unit (per_cu
, false, cu
->language
);
9799 cu
->per_cu
->imported_symtabs_push (per_cu
);
9803 /* RAII object that represents a process_die scope: i.e.,
9804 starts/finishes processing a DIE. */
9805 class process_die_scope
9808 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9809 : m_die (die
), m_cu (cu
)
9811 /* We should only be processing DIEs not already in process. */
9812 gdb_assert (!m_die
->in_process
);
9813 m_die
->in_process
= true;
9816 ~process_die_scope ()
9818 m_die
->in_process
= false;
9820 /* If we're done processing the DIE for the CU that owns the line
9821 header, we don't need the line header anymore. */
9822 if (m_cu
->line_header_die_owner
== m_die
)
9824 delete m_cu
->line_header
;
9825 m_cu
->line_header
= NULL
;
9826 m_cu
->line_header_die_owner
= NULL
;
9835 /* Process a die and its children. */
9838 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9840 process_die_scope
scope (die
, cu
);
9844 case DW_TAG_padding
:
9846 case DW_TAG_compile_unit
:
9847 case DW_TAG_partial_unit
:
9848 read_file_scope (die
, cu
);
9850 case DW_TAG_type_unit
:
9851 read_type_unit_scope (die
, cu
);
9853 case DW_TAG_subprogram
:
9854 /* Nested subprograms in Fortran get a prefix. */
9855 if (cu
->language
== language_fortran
9856 && die
->parent
!= NULL
9857 && die
->parent
->tag
== DW_TAG_subprogram
)
9858 cu
->processing_has_namespace_info
= true;
9860 case DW_TAG_inlined_subroutine
:
9861 read_func_scope (die
, cu
);
9863 case DW_TAG_lexical_block
:
9864 case DW_TAG_try_block
:
9865 case DW_TAG_catch_block
:
9866 read_lexical_block_scope (die
, cu
);
9868 case DW_TAG_call_site
:
9869 case DW_TAG_GNU_call_site
:
9870 read_call_site_scope (die
, cu
);
9872 case DW_TAG_class_type
:
9873 case DW_TAG_interface_type
:
9874 case DW_TAG_structure_type
:
9875 case DW_TAG_union_type
:
9876 process_structure_scope (die
, cu
);
9878 case DW_TAG_enumeration_type
:
9879 process_enumeration_scope (die
, cu
);
9882 /* These dies have a type, but processing them does not create
9883 a symbol or recurse to process the children. Therefore we can
9884 read them on-demand through read_type_die. */
9885 case DW_TAG_subroutine_type
:
9886 case DW_TAG_set_type
:
9887 case DW_TAG_array_type
:
9888 case DW_TAG_pointer_type
:
9889 case DW_TAG_ptr_to_member_type
:
9890 case DW_TAG_reference_type
:
9891 case DW_TAG_rvalue_reference_type
:
9892 case DW_TAG_string_type
:
9895 case DW_TAG_base_type
:
9896 case DW_TAG_subrange_type
:
9897 case DW_TAG_typedef
:
9898 /* Add a typedef symbol for the type definition, if it has a
9900 new_symbol (die
, read_type_die (die
, cu
), cu
);
9902 case DW_TAG_common_block
:
9903 read_common_block (die
, cu
);
9905 case DW_TAG_common_inclusion
:
9907 case DW_TAG_namespace
:
9908 cu
->processing_has_namespace_info
= true;
9909 read_namespace (die
, cu
);
9912 cu
->processing_has_namespace_info
= true;
9913 read_module (die
, cu
);
9915 case DW_TAG_imported_declaration
:
9916 cu
->processing_has_namespace_info
= true;
9917 if (read_namespace_alias (die
, cu
))
9919 /* The declaration is not a global namespace alias. */
9921 case DW_TAG_imported_module
:
9922 cu
->processing_has_namespace_info
= true;
9923 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9924 || cu
->language
!= language_fortran
))
9925 complaint (_("Tag '%s' has unexpected children"),
9926 dwarf_tag_name (die
->tag
));
9927 read_import_statement (die
, cu
);
9930 case DW_TAG_imported_unit
:
9931 process_imported_unit_die (die
, cu
);
9934 case DW_TAG_variable
:
9935 read_variable (die
, cu
);
9939 new_symbol (die
, NULL
, cu
);
9944 /* DWARF name computation. */
9946 /* A helper function for dwarf2_compute_name which determines whether DIE
9947 needs to have the name of the scope prepended to the name listed in the
9951 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9953 struct attribute
*attr
;
9957 case DW_TAG_namespace
:
9958 case DW_TAG_typedef
:
9959 case DW_TAG_class_type
:
9960 case DW_TAG_interface_type
:
9961 case DW_TAG_structure_type
:
9962 case DW_TAG_union_type
:
9963 case DW_TAG_enumeration_type
:
9964 case DW_TAG_enumerator
:
9965 case DW_TAG_subprogram
:
9966 case DW_TAG_inlined_subroutine
:
9968 case DW_TAG_imported_declaration
:
9971 case DW_TAG_variable
:
9972 case DW_TAG_constant
:
9973 /* We only need to prefix "globally" visible variables. These include
9974 any variable marked with DW_AT_external or any variable that
9975 lives in a namespace. [Variables in anonymous namespaces
9976 require prefixing, but they are not DW_AT_external.] */
9978 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
9980 struct dwarf2_cu
*spec_cu
= cu
;
9982 return die_needs_namespace (die_specification (die
, &spec_cu
),
9986 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9987 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
9988 && die
->parent
->tag
!= DW_TAG_module
)
9990 /* A variable in a lexical block of some kind does not need a
9991 namespace, even though in C++ such variables may be external
9992 and have a mangled name. */
9993 if (die
->parent
->tag
== DW_TAG_lexical_block
9994 || die
->parent
->tag
== DW_TAG_try_block
9995 || die
->parent
->tag
== DW_TAG_catch_block
9996 || die
->parent
->tag
== DW_TAG_subprogram
)
10005 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10006 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10007 defined for the given DIE. */
10009 static struct attribute
*
10010 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10012 struct attribute
*attr
;
10014 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10016 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10021 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10022 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10023 defined for the given DIE. */
10025 static const char *
10026 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10028 const char *linkage_name
;
10030 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10031 if (linkage_name
== NULL
)
10032 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10034 return linkage_name
;
10037 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10038 compute the physname for the object, which include a method's:
10039 - formal parameters (C++),
10040 - receiver type (Go),
10042 The term "physname" is a bit confusing.
10043 For C++, for example, it is the demangled name.
10044 For Go, for example, it's the mangled name.
10046 For Ada, return the DIE's linkage name rather than the fully qualified
10047 name. PHYSNAME is ignored..
10049 The result is allocated on the objfile_obstack and canonicalized. */
10051 static const char *
10052 dwarf2_compute_name (const char *name
,
10053 struct die_info
*die
, struct dwarf2_cu
*cu
,
10056 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10059 name
= dwarf2_name (die
, cu
);
10061 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10062 but otherwise compute it by typename_concat inside GDB.
10063 FIXME: Actually this is not really true, or at least not always true.
10064 It's all very confusing. compute_and_set_names doesn't try to demangle
10065 Fortran names because there is no mangling standard. So new_symbol
10066 will set the demangled name to the result of dwarf2_full_name, and it is
10067 the demangled name that GDB uses if it exists. */
10068 if (cu
->language
== language_ada
10069 || (cu
->language
== language_fortran
&& physname
))
10071 /* For Ada unit, we prefer the linkage name over the name, as
10072 the former contains the exported name, which the user expects
10073 to be able to reference. Ideally, we want the user to be able
10074 to reference this entity using either natural or linkage name,
10075 but we haven't started looking at this enhancement yet. */
10076 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10078 if (linkage_name
!= NULL
)
10079 return linkage_name
;
10082 /* These are the only languages we know how to qualify names in. */
10084 && (cu
->language
== language_cplus
10085 || cu
->language
== language_fortran
|| cu
->language
== language_d
10086 || cu
->language
== language_rust
))
10088 if (die_needs_namespace (die
, cu
))
10090 const char *prefix
;
10091 const char *canonical_name
= NULL
;
10095 prefix
= determine_prefix (die
, cu
);
10096 if (*prefix
!= '\0')
10098 gdb::unique_xmalloc_ptr
<char> prefixed_name
10099 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10101 buf
.puts (prefixed_name
.get ());
10106 /* Template parameters may be specified in the DIE's DW_AT_name, or
10107 as children with DW_TAG_template_type_param or
10108 DW_TAG_value_type_param. If the latter, add them to the name
10109 here. If the name already has template parameters, then
10110 skip this step; some versions of GCC emit both, and
10111 it is more efficient to use the pre-computed name.
10113 Something to keep in mind about this process: it is very
10114 unlikely, or in some cases downright impossible, to produce
10115 something that will match the mangled name of a function.
10116 If the definition of the function has the same debug info,
10117 we should be able to match up with it anyway. But fallbacks
10118 using the minimal symbol, for instance to find a method
10119 implemented in a stripped copy of libstdc++, will not work.
10120 If we do not have debug info for the definition, we will have to
10121 match them up some other way.
10123 When we do name matching there is a related problem with function
10124 templates; two instantiated function templates are allowed to
10125 differ only by their return types, which we do not add here. */
10127 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10129 struct attribute
*attr
;
10130 struct die_info
*child
;
10133 die
->building_fullname
= 1;
10135 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10139 const gdb_byte
*bytes
;
10140 struct dwarf2_locexpr_baton
*baton
;
10143 if (child
->tag
!= DW_TAG_template_type_param
10144 && child
->tag
!= DW_TAG_template_value_param
)
10155 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10158 complaint (_("template parameter missing DW_AT_type"));
10159 buf
.puts ("UNKNOWN_TYPE");
10162 type
= die_type (child
, cu
);
10164 if (child
->tag
== DW_TAG_template_type_param
)
10166 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10167 &type_print_raw_options
);
10171 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10174 complaint (_("template parameter missing "
10175 "DW_AT_const_value"));
10176 buf
.puts ("UNKNOWN_VALUE");
10180 dwarf2_const_value_attr (attr
, type
, name
,
10181 &cu
->comp_unit_obstack
, cu
,
10182 &value
, &bytes
, &baton
);
10184 if (TYPE_NOSIGN (type
))
10185 /* GDB prints characters as NUMBER 'CHAR'. If that's
10186 changed, this can use value_print instead. */
10187 c_printchar (value
, type
, &buf
);
10190 struct value_print_options opts
;
10193 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10197 else if (bytes
!= NULL
)
10199 v
= allocate_value (type
);
10200 memcpy (value_contents_writeable (v
), bytes
,
10201 TYPE_LENGTH (type
));
10204 v
= value_from_longest (type
, value
);
10206 /* Specify decimal so that we do not depend on
10208 get_formatted_print_options (&opts
, 'd');
10210 value_print (v
, &buf
, &opts
);
10215 die
->building_fullname
= 0;
10219 /* Close the argument list, with a space if necessary
10220 (nested templates). */
10221 if (!buf
.empty () && buf
.string ().back () == '>')
10228 /* For C++ methods, append formal parameter type
10229 information, if PHYSNAME. */
10231 if (physname
&& die
->tag
== DW_TAG_subprogram
10232 && cu
->language
== language_cplus
)
10234 struct type
*type
= read_type_die (die
, cu
);
10236 c_type_print_args (type
, &buf
, 1, cu
->language
,
10237 &type_print_raw_options
);
10239 if (cu
->language
== language_cplus
)
10241 /* Assume that an artificial first parameter is
10242 "this", but do not crash if it is not. RealView
10243 marks unnamed (and thus unused) parameters as
10244 artificial; there is no way to differentiate
10246 if (TYPE_NFIELDS (type
) > 0
10247 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10248 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10249 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10251 buf
.puts (" const");
10255 const std::string
&intermediate_name
= buf
.string ();
10257 if (cu
->language
== language_cplus
)
10259 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10262 /* If we only computed INTERMEDIATE_NAME, or if
10263 INTERMEDIATE_NAME is already canonical, then we need to
10265 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10266 name
= objfile
->intern (intermediate_name
);
10268 name
= canonical_name
;
10275 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10276 If scope qualifiers are appropriate they will be added. The result
10277 will be allocated on the storage_obstack, or NULL if the DIE does
10278 not have a name. NAME may either be from a previous call to
10279 dwarf2_name or NULL.
10281 The output string will be canonicalized (if C++). */
10283 static const char *
10284 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10286 return dwarf2_compute_name (name
, die
, cu
, 0);
10289 /* Construct a physname for the given DIE in CU. NAME may either be
10290 from a previous call to dwarf2_name or NULL. The result will be
10291 allocated on the objfile_objstack or NULL if the DIE does not have a
10294 The output string will be canonicalized (if C++). */
10296 static const char *
10297 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10299 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10300 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10303 /* In this case dwarf2_compute_name is just a shortcut not building anything
10305 if (!die_needs_namespace (die
, cu
))
10306 return dwarf2_compute_name (name
, die
, cu
, 1);
10308 mangled
= dw2_linkage_name (die
, cu
);
10310 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10311 See https://github.com/rust-lang/rust/issues/32925. */
10312 if (cu
->language
== language_rust
&& mangled
!= NULL
10313 && strchr (mangled
, '{') != NULL
)
10316 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10318 gdb::unique_xmalloc_ptr
<char> demangled
;
10319 if (mangled
!= NULL
)
10322 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10324 /* Do nothing (do not demangle the symbol name). */
10326 else if (cu
->language
== language_go
)
10328 /* This is a lie, but we already lie to the caller new_symbol.
10329 new_symbol assumes we return the mangled name.
10330 This just undoes that lie until things are cleaned up. */
10334 /* Use DMGL_RET_DROP for C++ template functions to suppress
10335 their return type. It is easier for GDB users to search
10336 for such functions as `name(params)' than `long name(params)'.
10337 In such case the minimal symbol names do not match the full
10338 symbol names but for template functions there is never a need
10339 to look up their definition from their declaration so
10340 the only disadvantage remains the minimal symbol variant
10341 `long name(params)' does not have the proper inferior type. */
10342 demangled
.reset (gdb_demangle (mangled
,
10343 (DMGL_PARAMS
| DMGL_ANSI
10344 | DMGL_RET_DROP
)));
10347 canon
= demangled
.get ();
10355 if (canon
== NULL
|| check_physname
)
10357 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10359 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10361 /* It may not mean a bug in GDB. The compiler could also
10362 compute DW_AT_linkage_name incorrectly. But in such case
10363 GDB would need to be bug-to-bug compatible. */
10365 complaint (_("Computed physname <%s> does not match demangled <%s> "
10366 "(from linkage <%s>) - DIE at %s [in module %s]"),
10367 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10368 objfile_name (objfile
));
10370 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10371 is available here - over computed PHYSNAME. It is safer
10372 against both buggy GDB and buggy compilers. */
10386 retval
= objfile
->intern (retval
);
10391 /* Inspect DIE in CU for a namespace alias. If one exists, record
10392 a new symbol for it.
10394 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10397 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10399 struct attribute
*attr
;
10401 /* If the die does not have a name, this is not a namespace
10403 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10407 struct die_info
*d
= die
;
10408 struct dwarf2_cu
*imported_cu
= cu
;
10410 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10411 keep inspecting DIEs until we hit the underlying import. */
10412 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10413 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10415 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10419 d
= follow_die_ref (d
, attr
, &imported_cu
);
10420 if (d
->tag
!= DW_TAG_imported_declaration
)
10424 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10426 complaint (_("DIE at %s has too many recursively imported "
10427 "declarations"), sect_offset_str (d
->sect_off
));
10434 sect_offset sect_off
= attr
->get_ref_die_offset ();
10436 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10437 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
10439 /* This declaration is a global namespace alias. Add
10440 a symbol for it whose type is the aliased namespace. */
10441 new_symbol (die
, type
, cu
);
10450 /* Return the using directives repository (global or local?) to use in the
10451 current context for CU.
10453 For Ada, imported declarations can materialize renamings, which *may* be
10454 global. However it is impossible (for now?) in DWARF to distinguish
10455 "external" imported declarations and "static" ones. As all imported
10456 declarations seem to be static in all other languages, make them all CU-wide
10457 global only in Ada. */
10459 static struct using_direct
**
10460 using_directives (struct dwarf2_cu
*cu
)
10462 if (cu
->language
== language_ada
10463 && cu
->get_builder ()->outermost_context_p ())
10464 return cu
->get_builder ()->get_global_using_directives ();
10466 return cu
->get_builder ()->get_local_using_directives ();
10469 /* Read the import statement specified by the given die and record it. */
10472 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10474 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10475 struct attribute
*import_attr
;
10476 struct die_info
*imported_die
, *child_die
;
10477 struct dwarf2_cu
*imported_cu
;
10478 const char *imported_name
;
10479 const char *imported_name_prefix
;
10480 const char *canonical_name
;
10481 const char *import_alias
;
10482 const char *imported_declaration
= NULL
;
10483 const char *import_prefix
;
10484 std::vector
<const char *> excludes
;
10486 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10487 if (import_attr
== NULL
)
10489 complaint (_("Tag '%s' has no DW_AT_import"),
10490 dwarf_tag_name (die
->tag
));
10495 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10496 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10497 if (imported_name
== NULL
)
10499 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10501 The import in the following code:
10515 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10516 <52> DW_AT_decl_file : 1
10517 <53> DW_AT_decl_line : 6
10518 <54> DW_AT_import : <0x75>
10519 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10520 <59> DW_AT_name : B
10521 <5b> DW_AT_decl_file : 1
10522 <5c> DW_AT_decl_line : 2
10523 <5d> DW_AT_type : <0x6e>
10525 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10526 <76> DW_AT_byte_size : 4
10527 <77> DW_AT_encoding : 5 (signed)
10529 imports the wrong die ( 0x75 instead of 0x58 ).
10530 This case will be ignored until the gcc bug is fixed. */
10534 /* Figure out the local name after import. */
10535 import_alias
= dwarf2_name (die
, cu
);
10537 /* Figure out where the statement is being imported to. */
10538 import_prefix
= determine_prefix (die
, cu
);
10540 /* Figure out what the scope of the imported die is and prepend it
10541 to the name of the imported die. */
10542 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10544 if (imported_die
->tag
!= DW_TAG_namespace
10545 && imported_die
->tag
!= DW_TAG_module
)
10547 imported_declaration
= imported_name
;
10548 canonical_name
= imported_name_prefix
;
10550 else if (strlen (imported_name_prefix
) > 0)
10551 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10552 imported_name_prefix
,
10553 (cu
->language
== language_d
? "." : "::"),
10554 imported_name
, (char *) NULL
);
10556 canonical_name
= imported_name
;
10558 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10559 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10560 child_die
= child_die
->sibling
)
10562 /* DWARF-4: A Fortran use statement with a “rename list” may be
10563 represented by an imported module entry with an import attribute
10564 referring to the module and owned entries corresponding to those
10565 entities that are renamed as part of being imported. */
10567 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10569 complaint (_("child DW_TAG_imported_declaration expected "
10570 "- DIE at %s [in module %s]"),
10571 sect_offset_str (child_die
->sect_off
),
10572 objfile_name (objfile
));
10576 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10577 if (import_attr
== NULL
)
10579 complaint (_("Tag '%s' has no DW_AT_import"),
10580 dwarf_tag_name (child_die
->tag
));
10585 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10587 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10588 if (imported_name
== NULL
)
10590 complaint (_("child DW_TAG_imported_declaration has unknown "
10591 "imported name - DIE at %s [in module %s]"),
10592 sect_offset_str (child_die
->sect_off
),
10593 objfile_name (objfile
));
10597 excludes
.push_back (imported_name
);
10599 process_die (child_die
, cu
);
10602 add_using_directive (using_directives (cu
),
10606 imported_declaration
,
10609 &objfile
->objfile_obstack
);
10612 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10613 types, but gives them a size of zero. Starting with version 14,
10614 ICC is compatible with GCC. */
10617 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10619 if (!cu
->checked_producer
)
10620 check_producer (cu
);
10622 return cu
->producer_is_icc_lt_14
;
10625 /* ICC generates a DW_AT_type for C void functions. This was observed on
10626 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10627 which says that void functions should not have a DW_AT_type. */
10630 producer_is_icc (struct dwarf2_cu
*cu
)
10632 if (!cu
->checked_producer
)
10633 check_producer (cu
);
10635 return cu
->producer_is_icc
;
10638 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10639 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10640 this, it was first present in GCC release 4.3.0. */
10643 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10645 if (!cu
->checked_producer
)
10646 check_producer (cu
);
10648 return cu
->producer_is_gcc_lt_4_3
;
10651 static file_and_directory
10652 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10654 file_and_directory res
;
10656 /* Find the filename. Do not use dwarf2_name here, since the filename
10657 is not a source language identifier. */
10658 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10659 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10661 if (res
.comp_dir
== NULL
10662 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10663 && IS_ABSOLUTE_PATH (res
.name
))
10665 res
.comp_dir_storage
= ldirname (res
.name
);
10666 if (!res
.comp_dir_storage
.empty ())
10667 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10669 if (res
.comp_dir
!= NULL
)
10671 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10672 directory, get rid of it. */
10673 const char *cp
= strchr (res
.comp_dir
, ':');
10675 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10676 res
.comp_dir
= cp
+ 1;
10679 if (res
.name
== NULL
)
10680 res
.name
= "<unknown>";
10685 /* Handle DW_AT_stmt_list for a compilation unit.
10686 DIE is the DW_TAG_compile_unit die for CU.
10687 COMP_DIR is the compilation directory. LOWPC is passed to
10688 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10691 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10692 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10694 struct dwarf2_per_objfile
*dwarf2_per_objfile
10695 = cu
->per_cu
->dwarf2_per_objfile
;
10696 struct attribute
*attr
;
10697 struct line_header line_header_local
;
10698 hashval_t line_header_local_hash
;
10700 int decode_mapping
;
10702 gdb_assert (! cu
->per_cu
->is_debug_types
);
10704 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10708 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10710 /* The line header hash table is only created if needed (it exists to
10711 prevent redundant reading of the line table for partial_units).
10712 If we're given a partial_unit, we'll need it. If we're given a
10713 compile_unit, then use the line header hash table if it's already
10714 created, but don't create one just yet. */
10716 if (dwarf2_per_objfile
->line_header_hash
== NULL
10717 && die
->tag
== DW_TAG_partial_unit
)
10719 dwarf2_per_objfile
->line_header_hash
10720 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10721 line_header_eq_voidp
,
10722 free_line_header_voidp
,
10726 line_header_local
.sect_off
= line_offset
;
10727 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10728 line_header_local_hash
= line_header_hash (&line_header_local
);
10729 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10731 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10732 &line_header_local
,
10733 line_header_local_hash
, NO_INSERT
);
10735 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10736 is not present in *SLOT (since if there is something in *SLOT then
10737 it will be for a partial_unit). */
10738 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10740 gdb_assert (*slot
!= NULL
);
10741 cu
->line_header
= (struct line_header
*) *slot
;
10746 /* dwarf_decode_line_header does not yet provide sufficient information.
10747 We always have to call also dwarf_decode_lines for it. */
10748 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10752 cu
->line_header
= lh
.release ();
10753 cu
->line_header_die_owner
= die
;
10755 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10759 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
.get (),
10760 &line_header_local
,
10761 line_header_local_hash
, INSERT
);
10762 gdb_assert (slot
!= NULL
);
10764 if (slot
!= NULL
&& *slot
== NULL
)
10766 /* This newly decoded line number information unit will be owned
10767 by line_header_hash hash table. */
10768 *slot
= cu
->line_header
;
10769 cu
->line_header_die_owner
= NULL
;
10773 /* We cannot free any current entry in (*slot) as that struct line_header
10774 may be already used by multiple CUs. Create only temporary decoded
10775 line_header for this CU - it may happen at most once for each line
10776 number information unit. And if we're not using line_header_hash
10777 then this is what we want as well. */
10778 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10780 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10781 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10786 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10789 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10791 struct dwarf2_per_objfile
*dwarf2_per_objfile
10792 = cu
->per_cu
->dwarf2_per_objfile
;
10793 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10794 struct gdbarch
*gdbarch
= objfile
->arch ();
10795 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10796 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10797 struct attribute
*attr
;
10798 struct die_info
*child_die
;
10799 CORE_ADDR baseaddr
;
10801 prepare_one_comp_unit (cu
, die
, cu
->language
);
10802 baseaddr
= objfile
->text_section_offset ();
10804 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10806 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10807 from finish_block. */
10808 if (lowpc
== ((CORE_ADDR
) -1))
10810 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10812 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10814 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10815 standardised yet. As a workaround for the language detection we fall
10816 back to the DW_AT_producer string. */
10817 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10818 cu
->language
= language_opencl
;
10820 /* Similar hack for Go. */
10821 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10822 set_cu_language (DW_LANG_Go
, cu
);
10824 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10826 /* Decode line number information if present. We do this before
10827 processing child DIEs, so that the line header table is available
10828 for DW_AT_decl_file. */
10829 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10831 /* Process all dies in compilation unit. */
10832 if (die
->child
!= NULL
)
10834 child_die
= die
->child
;
10835 while (child_die
&& child_die
->tag
)
10837 process_die (child_die
, cu
);
10838 child_die
= child_die
->sibling
;
10842 /* Decode macro information, if present. Dwarf 2 macro information
10843 refers to information in the line number info statement program
10844 header, so we can only read it if we've read the header
10846 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10848 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10849 if (attr
&& cu
->line_header
)
10851 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10852 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10854 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10858 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10859 if (attr
&& cu
->line_header
)
10861 unsigned int macro_offset
= DW_UNSND (attr
);
10863 dwarf_decode_macros (cu
, macro_offset
, 0);
10869 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
10871 struct type_unit_group
*tu_group
;
10873 struct attribute
*attr
;
10875 struct signatured_type
*sig_type
;
10877 gdb_assert (per_cu
->is_debug_types
);
10878 sig_type
= (struct signatured_type
*) per_cu
;
10880 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
10882 /* If we're using .gdb_index (includes -readnow) then
10883 per_cu->type_unit_group may not have been set up yet. */
10884 if (sig_type
->type_unit_group
== NULL
)
10885 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
10886 tu_group
= sig_type
->type_unit_group
;
10888 /* If we've already processed this stmt_list there's no real need to
10889 do it again, we could fake it and just recreate the part we need
10890 (file name,index -> symtab mapping). If data shows this optimization
10891 is useful we can do it then. */
10892 first_time
= tu_group
->compunit_symtab
== NULL
;
10894 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10899 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10900 lh
= dwarf_decode_line_header (line_offset
, this);
10905 start_symtab ("", NULL
, 0);
10908 gdb_assert (tu_group
->symtabs
== NULL
);
10909 gdb_assert (m_builder
== nullptr);
10910 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10911 m_builder
.reset (new struct buildsym_compunit
10912 (COMPUNIT_OBJFILE (cust
), "",
10913 COMPUNIT_DIRNAME (cust
),
10914 compunit_language (cust
),
10920 line_header
= lh
.release ();
10921 line_header_die_owner
= die
;
10925 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
10927 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10928 still initializing it, and our caller (a few levels up)
10929 process_full_type_unit still needs to know if this is the first
10933 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
10934 struct symtab
*, line_header
->file_names_size ());
10936 auto &file_names
= line_header
->file_names ();
10937 for (i
= 0; i
< file_names
.size (); ++i
)
10939 file_entry
&fe
= file_names
[i
];
10940 dwarf2_start_subfile (this, fe
.name
,
10941 fe
.include_dir (line_header
));
10942 buildsym_compunit
*b
= get_builder ();
10943 if (b
->get_current_subfile ()->symtab
== NULL
)
10945 /* NOTE: start_subfile will recognize when it's been
10946 passed a file it has already seen. So we can't
10947 assume there's a simple mapping from
10948 cu->line_header->file_names to subfiles, plus
10949 cu->line_header->file_names may contain dups. */
10950 b
->get_current_subfile ()->symtab
10951 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
10954 fe
.symtab
= b
->get_current_subfile ()->symtab
;
10955 tu_group
->symtabs
[i
] = fe
.symtab
;
10960 gdb_assert (m_builder
== nullptr);
10961 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
10962 m_builder
.reset (new struct buildsym_compunit
10963 (COMPUNIT_OBJFILE (cust
), "",
10964 COMPUNIT_DIRNAME (cust
),
10965 compunit_language (cust
),
10968 auto &file_names
= line_header
->file_names ();
10969 for (i
= 0; i
< file_names
.size (); ++i
)
10971 file_entry
&fe
= file_names
[i
];
10972 fe
.symtab
= tu_group
->symtabs
[i
];
10976 /* The main symtab is allocated last. Type units don't have DW_AT_name
10977 so they don't have a "real" (so to speak) symtab anyway.
10978 There is later code that will assign the main symtab to all symbols
10979 that don't have one. We need to handle the case of a symbol with a
10980 missing symtab (DW_AT_decl_file) anyway. */
10983 /* Process DW_TAG_type_unit.
10984 For TUs we want to skip the first top level sibling if it's not the
10985 actual type being defined by this TU. In this case the first top
10986 level sibling is there to provide context only. */
10989 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10991 struct die_info
*child_die
;
10993 prepare_one_comp_unit (cu
, die
, language_minimal
);
10995 /* Initialize (or reinitialize) the machinery for building symtabs.
10996 We do this before processing child DIEs, so that the line header table
10997 is available for DW_AT_decl_file. */
10998 cu
->setup_type_unit_groups (die
);
11000 if (die
->child
!= NULL
)
11002 child_die
= die
->child
;
11003 while (child_die
&& child_die
->tag
)
11005 process_die (child_die
, cu
);
11006 child_die
= child_die
->sibling
;
11013 http://gcc.gnu.org/wiki/DebugFission
11014 http://gcc.gnu.org/wiki/DebugFissionDWP
11016 To simplify handling of both DWO files ("object" files with the DWARF info)
11017 and DWP files (a file with the DWOs packaged up into one file), we treat
11018 DWP files as having a collection of virtual DWO files. */
11021 hash_dwo_file (const void *item
)
11023 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11026 hash
= htab_hash_string (dwo_file
->dwo_name
);
11027 if (dwo_file
->comp_dir
!= NULL
)
11028 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11033 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11035 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11036 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11038 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11040 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11041 return lhs
->comp_dir
== rhs
->comp_dir
;
11042 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11045 /* Allocate a hash table for DWO files. */
11048 allocate_dwo_file_hash_table ()
11050 auto delete_dwo_file
= [] (void *item
)
11052 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11057 return htab_up (htab_create_alloc (41,
11064 /* Lookup DWO file DWO_NAME. */
11067 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11068 const char *dwo_name
,
11069 const char *comp_dir
)
11071 struct dwo_file find_entry
;
11074 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11075 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
11077 find_entry
.dwo_name
= dwo_name
;
11078 find_entry
.comp_dir
= comp_dir
;
11079 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
.get (), &find_entry
,
11086 hash_dwo_unit (const void *item
)
11088 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11090 /* This drops the top 32 bits of the id, but is ok for a hash. */
11091 return dwo_unit
->signature
;
11095 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11097 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11098 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11100 /* The signature is assumed to be unique within the DWO file.
11101 So while object file CU dwo_id's always have the value zero,
11102 that's OK, assuming each object file DWO file has only one CU,
11103 and that's the rule for now. */
11104 return lhs
->signature
== rhs
->signature
;
11107 /* Allocate a hash table for DWO CUs,TUs.
11108 There is one of these tables for each of CUs,TUs for each DWO file. */
11111 allocate_dwo_unit_table ()
11113 /* Start out with a pretty small number.
11114 Generally DWO files contain only one CU and maybe some TUs. */
11115 return htab_up (htab_create_alloc (3,
11118 NULL
, xcalloc
, xfree
));
11121 /* die_reader_func for create_dwo_cu. */
11124 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11125 const gdb_byte
*info_ptr
,
11126 struct die_info
*comp_unit_die
,
11127 struct dwo_file
*dwo_file
,
11128 struct dwo_unit
*dwo_unit
)
11130 struct dwarf2_cu
*cu
= reader
->cu
;
11131 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11132 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11134 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11135 if (!signature
.has_value ())
11137 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11138 " its dwo_id [in module %s]"),
11139 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11143 dwo_unit
->dwo_file
= dwo_file
;
11144 dwo_unit
->signature
= *signature
;
11145 dwo_unit
->section
= section
;
11146 dwo_unit
->sect_off
= sect_off
;
11147 dwo_unit
->length
= cu
->per_cu
->length
;
11149 if (dwarf_read_debug
)
11150 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11151 sect_offset_str (sect_off
),
11152 hex_string (dwo_unit
->signature
));
11155 /* Create the dwo_units for the CUs in a DWO_FILE.
11156 Note: This function processes DWO files only, not DWP files. */
11159 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11160 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11161 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11163 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11164 const gdb_byte
*info_ptr
, *end_ptr
;
11166 section
.read (objfile
);
11167 info_ptr
= section
.buffer
;
11169 if (info_ptr
== NULL
)
11172 if (dwarf_read_debug
)
11174 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11175 section
.get_name (),
11176 section
.get_file_name ());
11179 end_ptr
= info_ptr
+ section
.size
;
11180 while (info_ptr
< end_ptr
)
11182 struct dwarf2_per_cu_data per_cu
;
11183 struct dwo_unit read_unit
{};
11184 struct dwo_unit
*dwo_unit
;
11186 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11188 memset (&per_cu
, 0, sizeof (per_cu
));
11189 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11190 per_cu
.is_debug_types
= 0;
11191 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11192 per_cu
.section
= §ion
;
11194 cutu_reader
reader (&per_cu
, cu
, &dwo_file
);
11195 if (!reader
.dummy_p
)
11196 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11197 &dwo_file
, &read_unit
);
11198 info_ptr
+= per_cu
.length
;
11200 // If the unit could not be parsed, skip it.
11201 if (read_unit
.dwo_file
== NULL
)
11204 if (cus_htab
== NULL
)
11205 cus_htab
= allocate_dwo_unit_table ();
11207 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11208 *dwo_unit
= read_unit
;
11209 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11210 gdb_assert (slot
!= NULL
);
11213 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11214 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11216 complaint (_("debug cu entry at offset %s is duplicate to"
11217 " the entry at offset %s, signature %s"),
11218 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11219 hex_string (dwo_unit
->signature
));
11221 *slot
= (void *)dwo_unit
;
11225 /* DWP file .debug_{cu,tu}_index section format:
11226 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11230 Both index sections have the same format, and serve to map a 64-bit
11231 signature to a set of section numbers. Each section begins with a header,
11232 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11233 indexes, and a pool of 32-bit section numbers. The index sections will be
11234 aligned at 8-byte boundaries in the file.
11236 The index section header consists of:
11238 V, 32 bit version number
11240 N, 32 bit number of compilation units or type units in the index
11241 M, 32 bit number of slots in the hash table
11243 Numbers are recorded using the byte order of the application binary.
11245 The hash table begins at offset 16 in the section, and consists of an array
11246 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11247 order of the application binary). Unused slots in the hash table are 0.
11248 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11250 The parallel table begins immediately after the hash table
11251 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11252 array of 32-bit indexes (using the byte order of the application binary),
11253 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11254 table contains a 32-bit index into the pool of section numbers. For unused
11255 hash table slots, the corresponding entry in the parallel table will be 0.
11257 The pool of section numbers begins immediately following the hash table
11258 (at offset 16 + 12 * M from the beginning of the section). The pool of
11259 section numbers consists of an array of 32-bit words (using the byte order
11260 of the application binary). Each item in the array is indexed starting
11261 from 0. The hash table entry provides the index of the first section
11262 number in the set. Additional section numbers in the set follow, and the
11263 set is terminated by a 0 entry (section number 0 is not used in ELF).
11265 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11266 section must be the first entry in the set, and the .debug_abbrev.dwo must
11267 be the second entry. Other members of the set may follow in any order.
11273 DWP Version 2 combines all the .debug_info, etc. sections into one,
11274 and the entries in the index tables are now offsets into these sections.
11275 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11278 Index Section Contents:
11280 Hash Table of Signatures dwp_hash_table.hash_table
11281 Parallel Table of Indices dwp_hash_table.unit_table
11282 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11283 Table of Section Sizes dwp_hash_table.v2.sizes
11285 The index section header consists of:
11287 V, 32 bit version number
11288 L, 32 bit number of columns in the table of section offsets
11289 N, 32 bit number of compilation units or type units in the index
11290 M, 32 bit number of slots in the hash table
11292 Numbers are recorded using the byte order of the application binary.
11294 The hash table has the same format as version 1.
11295 The parallel table of indices has the same format as version 1,
11296 except that the entries are origin-1 indices into the table of sections
11297 offsets and the table of section sizes.
11299 The table of offsets begins immediately following the parallel table
11300 (at offset 16 + 12 * M from the beginning of the section). The table is
11301 a two-dimensional array of 32-bit words (using the byte order of the
11302 application binary), with L columns and N+1 rows, in row-major order.
11303 Each row in the array is indexed starting from 0. The first row provides
11304 a key to the remaining rows: each column in this row provides an identifier
11305 for a debug section, and the offsets in the same column of subsequent rows
11306 refer to that section. The section identifiers are:
11308 DW_SECT_INFO 1 .debug_info.dwo
11309 DW_SECT_TYPES 2 .debug_types.dwo
11310 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11311 DW_SECT_LINE 4 .debug_line.dwo
11312 DW_SECT_LOC 5 .debug_loc.dwo
11313 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11314 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11315 DW_SECT_MACRO 8 .debug_macro.dwo
11317 The offsets provided by the CU and TU index sections are the base offsets
11318 for the contributions made by each CU or TU to the corresponding section
11319 in the package file. Each CU and TU header contains an abbrev_offset
11320 field, used to find the abbreviations table for that CU or TU within the
11321 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11322 be interpreted as relative to the base offset given in the index section.
11323 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11324 should be interpreted as relative to the base offset for .debug_line.dwo,
11325 and offsets into other debug sections obtained from DWARF attributes should
11326 also be interpreted as relative to the corresponding base offset.
11328 The table of sizes begins immediately following the table of offsets.
11329 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11330 with L columns and N rows, in row-major order. Each row in the array is
11331 indexed starting from 1 (row 0 is shared by the two tables).
11335 Hash table lookup is handled the same in version 1 and 2:
11337 We assume that N and M will not exceed 2^32 - 1.
11338 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11340 Given a 64-bit compilation unit signature or a type signature S, an entry
11341 in the hash table is located as follows:
11343 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11344 the low-order k bits all set to 1.
11346 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11348 3) If the hash table entry at index H matches the signature, use that
11349 entry. If the hash table entry at index H is unused (all zeroes),
11350 terminate the search: the signature is not present in the table.
11352 4) Let H = (H + H') modulo M. Repeat at Step 3.
11354 Because M > N and H' and M are relatively prime, the search is guaranteed
11355 to stop at an unused slot or find the match. */
11357 /* Create a hash table to map DWO IDs to their CU/TU entry in
11358 .debug_{info,types}.dwo in DWP_FILE.
11359 Returns NULL if there isn't one.
11360 Note: This function processes DWP files only, not DWO files. */
11362 static struct dwp_hash_table
*
11363 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11364 struct dwp_file
*dwp_file
, int is_debug_types
)
11366 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11367 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11368 const gdb_byte
*index_ptr
, *index_end
;
11369 struct dwarf2_section_info
*index
;
11370 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11371 struct dwp_hash_table
*htab
;
11373 if (is_debug_types
)
11374 index
= &dwp_file
->sections
.tu_index
;
11376 index
= &dwp_file
->sections
.cu_index
;
11378 if (index
->empty ())
11380 index
->read (objfile
);
11382 index_ptr
= index
->buffer
;
11383 index_end
= index_ptr
+ index
->size
;
11385 version
= read_4_bytes (dbfd
, index_ptr
);
11388 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11392 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11394 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11397 if (version
!= 1 && version
!= 2)
11399 error (_("Dwarf Error: unsupported DWP file version (%s)"
11400 " [in module %s]"),
11401 pulongest (version
), dwp_file
->name
);
11403 if (nr_slots
!= (nr_slots
& -nr_slots
))
11405 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11406 " is not power of 2 [in module %s]"),
11407 pulongest (nr_slots
), dwp_file
->name
);
11410 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
11411 htab
->version
= version
;
11412 htab
->nr_columns
= nr_columns
;
11413 htab
->nr_units
= nr_units
;
11414 htab
->nr_slots
= nr_slots
;
11415 htab
->hash_table
= index_ptr
;
11416 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11418 /* Exit early if the table is empty. */
11419 if (nr_slots
== 0 || nr_units
== 0
11420 || (version
== 2 && nr_columns
== 0))
11422 /* All must be zero. */
11423 if (nr_slots
!= 0 || nr_units
!= 0
11424 || (version
== 2 && nr_columns
!= 0))
11426 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11427 " all zero [in modules %s]"),
11435 htab
->section_pool
.v1
.indices
=
11436 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11437 /* It's harder to decide whether the section is too small in v1.
11438 V1 is deprecated anyway so we punt. */
11442 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11443 int *ids
= htab
->section_pool
.v2
.section_ids
;
11444 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11445 /* Reverse map for error checking. */
11446 int ids_seen
[DW_SECT_MAX
+ 1];
11449 if (nr_columns
< 2)
11451 error (_("Dwarf Error: bad DWP hash table, too few columns"
11452 " in section table [in module %s]"),
11455 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11457 error (_("Dwarf Error: bad DWP hash table, too many columns"
11458 " in section table [in module %s]"),
11461 memset (ids
, 255, sizeof_ids
);
11462 memset (ids_seen
, 255, sizeof (ids_seen
));
11463 for (i
= 0; i
< nr_columns
; ++i
)
11465 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11467 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11469 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11470 " in section table [in module %s]"),
11471 id
, dwp_file
->name
);
11473 if (ids_seen
[id
] != -1)
11475 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11476 " id %d in section table [in module %s]"),
11477 id
, dwp_file
->name
);
11482 /* Must have exactly one info or types section. */
11483 if (((ids_seen
[DW_SECT_INFO
] != -1)
11484 + (ids_seen
[DW_SECT_TYPES
] != -1))
11487 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11488 " DWO info/types section [in module %s]"),
11491 /* Must have an abbrev section. */
11492 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11494 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11495 " section [in module %s]"),
11498 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11499 htab
->section_pool
.v2
.sizes
=
11500 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11501 * nr_units
* nr_columns
);
11502 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11503 * nr_units
* nr_columns
))
11506 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11507 " [in module %s]"),
11515 /* Update SECTIONS with the data from SECTP.
11517 This function is like the other "locate" section routines that are
11518 passed to bfd_map_over_sections, but in this context the sections to
11519 read comes from the DWP V1 hash table, not the full ELF section table.
11521 The result is non-zero for success, or zero if an error was found. */
11524 locate_v1_virtual_dwo_sections (asection
*sectp
,
11525 struct virtual_v1_dwo_sections
*sections
)
11527 const struct dwop_section_names
*names
= &dwop_section_names
;
11529 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11531 /* There can be only one. */
11532 if (sections
->abbrev
.s
.section
!= NULL
)
11534 sections
->abbrev
.s
.section
= sectp
;
11535 sections
->abbrev
.size
= bfd_section_size (sectp
);
11537 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11538 || section_is_p (sectp
->name
, &names
->types_dwo
))
11540 /* There can be only one. */
11541 if (sections
->info_or_types
.s
.section
!= NULL
)
11543 sections
->info_or_types
.s
.section
= sectp
;
11544 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11546 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11548 /* There can be only one. */
11549 if (sections
->line
.s
.section
!= NULL
)
11551 sections
->line
.s
.section
= sectp
;
11552 sections
->line
.size
= bfd_section_size (sectp
);
11554 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11556 /* There can be only one. */
11557 if (sections
->loc
.s
.section
!= NULL
)
11559 sections
->loc
.s
.section
= sectp
;
11560 sections
->loc
.size
= bfd_section_size (sectp
);
11562 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11564 /* There can be only one. */
11565 if (sections
->macinfo
.s
.section
!= NULL
)
11567 sections
->macinfo
.s
.section
= sectp
;
11568 sections
->macinfo
.size
= bfd_section_size (sectp
);
11570 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11572 /* There can be only one. */
11573 if (sections
->macro
.s
.section
!= NULL
)
11575 sections
->macro
.s
.section
= sectp
;
11576 sections
->macro
.size
= bfd_section_size (sectp
);
11578 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11580 /* There can be only one. */
11581 if (sections
->str_offsets
.s
.section
!= NULL
)
11583 sections
->str_offsets
.s
.section
= sectp
;
11584 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11588 /* No other kind of section is valid. */
11595 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11596 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11597 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11598 This is for DWP version 1 files. */
11600 static struct dwo_unit
*
11601 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11602 struct dwp_file
*dwp_file
,
11603 uint32_t unit_index
,
11604 const char *comp_dir
,
11605 ULONGEST signature
, int is_debug_types
)
11607 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11608 const struct dwp_hash_table
*dwp_htab
=
11609 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11610 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11611 const char *kind
= is_debug_types
? "TU" : "CU";
11612 struct dwo_file
*dwo_file
;
11613 struct dwo_unit
*dwo_unit
;
11614 struct virtual_v1_dwo_sections sections
;
11615 void **dwo_file_slot
;
11618 gdb_assert (dwp_file
->version
== 1);
11620 if (dwarf_read_debug
)
11622 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11624 pulongest (unit_index
), hex_string (signature
),
11628 /* Fetch the sections of this DWO unit.
11629 Put a limit on the number of sections we look for so that bad data
11630 doesn't cause us to loop forever. */
11632 #define MAX_NR_V1_DWO_SECTIONS \
11633 (1 /* .debug_info or .debug_types */ \
11634 + 1 /* .debug_abbrev */ \
11635 + 1 /* .debug_line */ \
11636 + 1 /* .debug_loc */ \
11637 + 1 /* .debug_str_offsets */ \
11638 + 1 /* .debug_macro or .debug_macinfo */ \
11639 + 1 /* trailing zero */)
11641 memset (§ions
, 0, sizeof (sections
));
11643 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11646 uint32_t section_nr
=
11647 read_4_bytes (dbfd
,
11648 dwp_htab
->section_pool
.v1
.indices
11649 + (unit_index
+ i
) * sizeof (uint32_t));
11651 if (section_nr
== 0)
11653 if (section_nr
>= dwp_file
->num_sections
)
11655 error (_("Dwarf Error: bad DWP hash table, section number too large"
11656 " [in module %s]"),
11660 sectp
= dwp_file
->elf_sections
[section_nr
];
11661 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11663 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11664 " [in module %s]"),
11670 || sections
.info_or_types
.empty ()
11671 || sections
.abbrev
.empty ())
11673 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11674 " [in module %s]"),
11677 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11679 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11680 " [in module %s]"),
11684 /* It's easier for the rest of the code if we fake a struct dwo_file and
11685 have dwo_unit "live" in that. At least for now.
11687 The DWP file can be made up of a random collection of CUs and TUs.
11688 However, for each CU + set of TUs that came from the same original DWO
11689 file, we can combine them back into a virtual DWO file to save space
11690 (fewer struct dwo_file objects to allocate). Remember that for really
11691 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11693 std::string virtual_dwo_name
=
11694 string_printf ("virtual-dwo/%d-%d-%d-%d",
11695 sections
.abbrev
.get_id (),
11696 sections
.line
.get_id (),
11697 sections
.loc
.get_id (),
11698 sections
.str_offsets
.get_id ());
11699 /* Can we use an existing virtual DWO file? */
11700 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11701 virtual_dwo_name
.c_str (),
11703 /* Create one if necessary. */
11704 if (*dwo_file_slot
== NULL
)
11706 if (dwarf_read_debug
)
11708 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11709 virtual_dwo_name
.c_str ());
11711 dwo_file
= new struct dwo_file
;
11712 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11713 dwo_file
->comp_dir
= comp_dir
;
11714 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11715 dwo_file
->sections
.line
= sections
.line
;
11716 dwo_file
->sections
.loc
= sections
.loc
;
11717 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11718 dwo_file
->sections
.macro
= sections
.macro
;
11719 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11720 /* The "str" section is global to the entire DWP file. */
11721 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11722 /* The info or types section is assigned below to dwo_unit,
11723 there's no need to record it in dwo_file.
11724 Also, we can't simply record type sections in dwo_file because
11725 we record a pointer into the vector in dwo_unit. As we collect more
11726 types we'll grow the vector and eventually have to reallocate space
11727 for it, invalidating all copies of pointers into the previous
11729 *dwo_file_slot
= dwo_file
;
11733 if (dwarf_read_debug
)
11735 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11736 virtual_dwo_name
.c_str ());
11738 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11741 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11742 dwo_unit
->dwo_file
= dwo_file
;
11743 dwo_unit
->signature
= signature
;
11744 dwo_unit
->section
=
11745 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11746 *dwo_unit
->section
= sections
.info_or_types
;
11747 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11752 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11753 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11754 piece within that section used by a TU/CU, return a virtual section
11755 of just that piece. */
11757 static struct dwarf2_section_info
11758 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11759 struct dwarf2_section_info
*section
,
11760 bfd_size_type offset
, bfd_size_type size
)
11762 struct dwarf2_section_info result
;
11765 gdb_assert (section
!= NULL
);
11766 gdb_assert (!section
->is_virtual
);
11768 memset (&result
, 0, sizeof (result
));
11769 result
.s
.containing_section
= section
;
11770 result
.is_virtual
= true;
11775 sectp
= section
->get_bfd_section ();
11777 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11778 bounds of the real section. This is a pretty-rare event, so just
11779 flag an error (easier) instead of a warning and trying to cope. */
11781 || offset
+ size
> bfd_section_size (sectp
))
11783 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11784 " in section %s [in module %s]"),
11785 sectp
? bfd_section_name (sectp
) : "<unknown>",
11786 objfile_name (dwarf2_per_objfile
->objfile
));
11789 result
.virtual_offset
= offset
;
11790 result
.size
= size
;
11794 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11795 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11796 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11797 This is for DWP version 2 files. */
11799 static struct dwo_unit
*
11800 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11801 struct dwp_file
*dwp_file
,
11802 uint32_t unit_index
,
11803 const char *comp_dir
,
11804 ULONGEST signature
, int is_debug_types
)
11806 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11807 const struct dwp_hash_table
*dwp_htab
=
11808 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11809 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11810 const char *kind
= is_debug_types
? "TU" : "CU";
11811 struct dwo_file
*dwo_file
;
11812 struct dwo_unit
*dwo_unit
;
11813 struct virtual_v2_dwo_sections sections
;
11814 void **dwo_file_slot
;
11817 gdb_assert (dwp_file
->version
== 2);
11819 if (dwarf_read_debug
)
11821 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11823 pulongest (unit_index
), hex_string (signature
),
11827 /* Fetch the section offsets of this DWO unit. */
11829 memset (§ions
, 0, sizeof (sections
));
11831 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11833 uint32_t offset
= read_4_bytes (dbfd
,
11834 dwp_htab
->section_pool
.v2
.offsets
11835 + (((unit_index
- 1) * dwp_htab
->nr_columns
11837 * sizeof (uint32_t)));
11838 uint32_t size
= read_4_bytes (dbfd
,
11839 dwp_htab
->section_pool
.v2
.sizes
11840 + (((unit_index
- 1) * dwp_htab
->nr_columns
11842 * sizeof (uint32_t)));
11844 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11847 case DW_SECT_TYPES
:
11848 sections
.info_or_types_offset
= offset
;
11849 sections
.info_or_types_size
= size
;
11851 case DW_SECT_ABBREV
:
11852 sections
.abbrev_offset
= offset
;
11853 sections
.abbrev_size
= size
;
11856 sections
.line_offset
= offset
;
11857 sections
.line_size
= size
;
11860 sections
.loc_offset
= offset
;
11861 sections
.loc_size
= size
;
11863 case DW_SECT_STR_OFFSETS
:
11864 sections
.str_offsets_offset
= offset
;
11865 sections
.str_offsets_size
= size
;
11867 case DW_SECT_MACINFO
:
11868 sections
.macinfo_offset
= offset
;
11869 sections
.macinfo_size
= size
;
11871 case DW_SECT_MACRO
:
11872 sections
.macro_offset
= offset
;
11873 sections
.macro_size
= size
;
11878 /* It's easier for the rest of the code if we fake a struct dwo_file and
11879 have dwo_unit "live" in that. At least for now.
11881 The DWP file can be made up of a random collection of CUs and TUs.
11882 However, for each CU + set of TUs that came from the same original DWO
11883 file, we can combine them back into a virtual DWO file to save space
11884 (fewer struct dwo_file objects to allocate). Remember that for really
11885 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11887 std::string virtual_dwo_name
=
11888 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11889 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11890 (long) (sections
.line_size
? sections
.line_offset
: 0),
11891 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11892 (long) (sections
.str_offsets_size
11893 ? sections
.str_offsets_offset
: 0));
11894 /* Can we use an existing virtual DWO file? */
11895 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11896 virtual_dwo_name
.c_str (),
11898 /* Create one if necessary. */
11899 if (*dwo_file_slot
== NULL
)
11901 if (dwarf_read_debug
)
11903 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11904 virtual_dwo_name
.c_str ());
11906 dwo_file
= new struct dwo_file
;
11907 dwo_file
->dwo_name
= objfile
->intern (virtual_dwo_name
);
11908 dwo_file
->comp_dir
= comp_dir
;
11909 dwo_file
->sections
.abbrev
=
11910 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
11911 sections
.abbrev_offset
, sections
.abbrev_size
);
11912 dwo_file
->sections
.line
=
11913 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
11914 sections
.line_offset
, sections
.line_size
);
11915 dwo_file
->sections
.loc
=
11916 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
11917 sections
.loc_offset
, sections
.loc_size
);
11918 dwo_file
->sections
.macinfo
=
11919 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
11920 sections
.macinfo_offset
, sections
.macinfo_size
);
11921 dwo_file
->sections
.macro
=
11922 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
11923 sections
.macro_offset
, sections
.macro_size
);
11924 dwo_file
->sections
.str_offsets
=
11925 create_dwp_v2_section (dwarf2_per_objfile
,
11926 &dwp_file
->sections
.str_offsets
,
11927 sections
.str_offsets_offset
,
11928 sections
.str_offsets_size
);
11929 /* The "str" section is global to the entire DWP file. */
11930 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11931 /* The info or types section is assigned below to dwo_unit,
11932 there's no need to record it in dwo_file.
11933 Also, we can't simply record type sections in dwo_file because
11934 we record a pointer into the vector in dwo_unit. As we collect more
11935 types we'll grow the vector and eventually have to reallocate space
11936 for it, invalidating all copies of pointers into the previous
11938 *dwo_file_slot
= dwo_file
;
11942 if (dwarf_read_debug
)
11944 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11945 virtual_dwo_name
.c_str ());
11947 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11950 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11951 dwo_unit
->dwo_file
= dwo_file
;
11952 dwo_unit
->signature
= signature
;
11953 dwo_unit
->section
=
11954 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11955 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
11957 ? &dwp_file
->sections
.types
11958 : &dwp_file
->sections
.info
,
11959 sections
.info_or_types_offset
,
11960 sections
.info_or_types_size
);
11961 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11966 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
11967 Returns NULL if the signature isn't found. */
11969 static struct dwo_unit
*
11970 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11971 struct dwp_file
*dwp_file
, const char *comp_dir
,
11972 ULONGEST signature
, int is_debug_types
)
11974 const struct dwp_hash_table
*dwp_htab
=
11975 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11976 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11977 uint32_t mask
= dwp_htab
->nr_slots
- 1;
11978 uint32_t hash
= signature
& mask
;
11979 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
11982 struct dwo_unit find_dwo_cu
;
11984 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
11985 find_dwo_cu
.signature
= signature
;
11986 slot
= htab_find_slot (is_debug_types
11987 ? dwp_file
->loaded_tus
.get ()
11988 : dwp_file
->loaded_cus
.get (),
11989 &find_dwo_cu
, INSERT
);
11992 return (struct dwo_unit
*) *slot
;
11994 /* Use a for loop so that we don't loop forever on bad debug info. */
11995 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
11997 ULONGEST signature_in_table
;
11999 signature_in_table
=
12000 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12001 if (signature_in_table
== signature
)
12003 uint32_t unit_index
=
12004 read_4_bytes (dbfd
,
12005 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12007 if (dwp_file
->version
== 1)
12009 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12010 dwp_file
, unit_index
,
12011 comp_dir
, signature
,
12016 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12017 dwp_file
, unit_index
,
12018 comp_dir
, signature
,
12021 return (struct dwo_unit
*) *slot
;
12023 if (signature_in_table
== 0)
12025 hash
= (hash
+ hash2
) & mask
;
12028 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12029 " [in module %s]"),
12033 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12034 Open the file specified by FILE_NAME and hand it off to BFD for
12035 preliminary analysis. Return a newly initialized bfd *, which
12036 includes a canonicalized copy of FILE_NAME.
12037 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12038 SEARCH_CWD is true if the current directory is to be searched.
12039 It will be searched before debug-file-directory.
12040 If successful, the file is added to the bfd include table of the
12041 objfile's bfd (see gdb_bfd_record_inclusion).
12042 If unable to find/open the file, return NULL.
12043 NOTE: This function is derived from symfile_bfd_open. */
12045 static gdb_bfd_ref_ptr
12046 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12047 const char *file_name
, int is_dwp
, int search_cwd
)
12050 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12051 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12052 to debug_file_directory. */
12053 const char *search_path
;
12054 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12056 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12059 if (*debug_file_directory
!= '\0')
12061 search_path_holder
.reset (concat (".", dirname_separator_string
,
12062 debug_file_directory
,
12064 search_path
= search_path_holder
.get ();
12070 search_path
= debug_file_directory
;
12072 openp_flags flags
= OPF_RETURN_REALPATH
;
12074 flags
|= OPF_SEARCH_IN_PATH
;
12076 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12077 desc
= openp (search_path
, flags
, file_name
,
12078 O_RDONLY
| O_BINARY
, &absolute_name
);
12082 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12084 if (sym_bfd
== NULL
)
12086 bfd_set_cacheable (sym_bfd
.get (), 1);
12088 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12091 /* Success. Record the bfd as having been included by the objfile's bfd.
12092 This is important because things like demangled_names_hash lives in the
12093 objfile's per_bfd space and may have references to things like symbol
12094 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12095 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12100 /* Try to open DWO file FILE_NAME.
12101 COMP_DIR is the DW_AT_comp_dir attribute.
12102 The result is the bfd handle of the file.
12103 If there is a problem finding or opening the file, return NULL.
12104 Upon success, the canonicalized path of the file is stored in the bfd,
12105 same as symfile_bfd_open. */
12107 static gdb_bfd_ref_ptr
12108 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12109 const char *file_name
, const char *comp_dir
)
12111 if (IS_ABSOLUTE_PATH (file_name
))
12112 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12113 0 /*is_dwp*/, 0 /*search_cwd*/);
12115 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12117 if (comp_dir
!= NULL
)
12119 gdb::unique_xmalloc_ptr
<char> path_to_try
12120 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12122 /* NOTE: If comp_dir is a relative path, this will also try the
12123 search path, which seems useful. */
12124 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12125 path_to_try
.get (),
12127 1 /*search_cwd*/));
12132 /* That didn't work, try debug-file-directory, which, despite its name,
12133 is a list of paths. */
12135 if (*debug_file_directory
== '\0')
12138 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12139 0 /*is_dwp*/, 1 /*search_cwd*/);
12142 /* This function is mapped across the sections and remembers the offset and
12143 size of each of the DWO debugging sections we are interested in. */
12146 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12148 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12149 const struct dwop_section_names
*names
= &dwop_section_names
;
12151 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12153 dwo_sections
->abbrev
.s
.section
= sectp
;
12154 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12156 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12158 dwo_sections
->info
.s
.section
= sectp
;
12159 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12161 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12163 dwo_sections
->line
.s
.section
= sectp
;
12164 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12166 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12168 dwo_sections
->loc
.s
.section
= sectp
;
12169 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12171 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12173 dwo_sections
->loclists
.s
.section
= sectp
;
12174 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12176 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12178 dwo_sections
->macinfo
.s
.section
= sectp
;
12179 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12181 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12183 dwo_sections
->macro
.s
.section
= sectp
;
12184 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12186 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12188 dwo_sections
->str
.s
.section
= sectp
;
12189 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12191 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12193 dwo_sections
->str_offsets
.s
.section
= sectp
;
12194 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12196 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12198 struct dwarf2_section_info type_section
;
12200 memset (&type_section
, 0, sizeof (type_section
));
12201 type_section
.s
.section
= sectp
;
12202 type_section
.size
= bfd_section_size (sectp
);
12203 dwo_sections
->types
.push_back (type_section
);
12207 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12208 by PER_CU. This is for the non-DWP case.
12209 The result is NULL if DWO_NAME can't be found. */
12211 static struct dwo_file
*
12212 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12213 const char *dwo_name
, const char *comp_dir
)
12215 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12217 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12220 if (dwarf_read_debug
)
12221 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12225 dwo_file_up
dwo_file (new struct dwo_file
);
12226 dwo_file
->dwo_name
= dwo_name
;
12227 dwo_file
->comp_dir
= comp_dir
;
12228 dwo_file
->dbfd
= std::move (dbfd
);
12230 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12231 &dwo_file
->sections
);
12233 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12234 dwo_file
->sections
.info
, dwo_file
->cus
);
12236 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12237 dwo_file
->sections
.types
, dwo_file
->tus
);
12239 if (dwarf_read_debug
)
12240 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12242 return dwo_file
.release ();
12245 /* This function is mapped across the sections and remembers the offset and
12246 size of each of the DWP debugging sections common to version 1 and 2 that
12247 we are interested in. */
12250 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12251 void *dwp_file_ptr
)
12253 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12254 const struct dwop_section_names
*names
= &dwop_section_names
;
12255 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12257 /* Record the ELF section number for later lookup: this is what the
12258 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12259 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12260 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12262 /* Look for specific sections that we need. */
12263 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12265 dwp_file
->sections
.str
.s
.section
= sectp
;
12266 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12268 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12270 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12271 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12273 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12275 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12276 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12280 /* This function is mapped across the sections and remembers the offset and
12281 size of each of the DWP version 2 debugging sections that we are interested
12282 in. This is split into a separate function because we don't know if we
12283 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12286 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12288 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12289 const struct dwop_section_names
*names
= &dwop_section_names
;
12290 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12292 /* Record the ELF section number for later lookup: this is what the
12293 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12294 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12295 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12297 /* Look for specific sections that we need. */
12298 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12300 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12301 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12303 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12305 dwp_file
->sections
.info
.s
.section
= sectp
;
12306 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12308 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12310 dwp_file
->sections
.line
.s
.section
= sectp
;
12311 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12313 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12315 dwp_file
->sections
.loc
.s
.section
= sectp
;
12316 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12318 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12320 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12321 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12323 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12325 dwp_file
->sections
.macro
.s
.section
= sectp
;
12326 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12328 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12330 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12331 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12333 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12335 dwp_file
->sections
.types
.s
.section
= sectp
;
12336 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12340 /* Hash function for dwp_file loaded CUs/TUs. */
12343 hash_dwp_loaded_cutus (const void *item
)
12345 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12347 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12348 return dwo_unit
->signature
;
12351 /* Equality function for dwp_file loaded CUs/TUs. */
12354 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12356 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12357 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12359 return dua
->signature
== dub
->signature
;
12362 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12365 allocate_dwp_loaded_cutus_table ()
12367 return htab_up (htab_create_alloc (3,
12368 hash_dwp_loaded_cutus
,
12369 eq_dwp_loaded_cutus
,
12370 NULL
, xcalloc
, xfree
));
12373 /* Try to open DWP file FILE_NAME.
12374 The result is the bfd handle of the file.
12375 If there is a problem finding or opening the file, return NULL.
12376 Upon success, the canonicalized path of the file is stored in the bfd,
12377 same as symfile_bfd_open. */
12379 static gdb_bfd_ref_ptr
12380 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12381 const char *file_name
)
12383 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12385 1 /*search_cwd*/));
12389 /* Work around upstream bug 15652.
12390 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12391 [Whether that's a "bug" is debatable, but it is getting in our way.]
12392 We have no real idea where the dwp file is, because gdb's realpath-ing
12393 of the executable's path may have discarded the needed info.
12394 [IWBN if the dwp file name was recorded in the executable, akin to
12395 .gnu_debuglink, but that doesn't exist yet.]
12396 Strip the directory from FILE_NAME and search again. */
12397 if (*debug_file_directory
!= '\0')
12399 /* Don't implicitly search the current directory here.
12400 If the user wants to search "." to handle this case,
12401 it must be added to debug-file-directory. */
12402 return try_open_dwop_file (dwarf2_per_objfile
,
12403 lbasename (file_name
), 1 /*is_dwp*/,
12410 /* Initialize the use of the DWP file for the current objfile.
12411 By convention the name of the DWP file is ${objfile}.dwp.
12412 The result is NULL if it can't be found. */
12414 static std::unique_ptr
<struct dwp_file
>
12415 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12419 /* Try to find first .dwp for the binary file before any symbolic links
12422 /* If the objfile is a debug file, find the name of the real binary
12423 file and get the name of dwp file from there. */
12424 std::string dwp_name
;
12425 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12427 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12428 const char *backlink_basename
= lbasename (backlink
->original_name
);
12430 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12433 dwp_name
= objfile
->original_name
;
12435 dwp_name
+= ".dwp";
12437 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12439 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12441 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12442 dwp_name
= objfile_name (objfile
);
12443 dwp_name
+= ".dwp";
12444 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12449 if (dwarf_read_debug
)
12450 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12451 return std::unique_ptr
<dwp_file
> ();
12454 const char *name
= bfd_get_filename (dbfd
.get ());
12455 std::unique_ptr
<struct dwp_file
> dwp_file
12456 (new struct dwp_file (name
, std::move (dbfd
)));
12458 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12459 dwp_file
->elf_sections
=
12460 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
12461 dwp_file
->num_sections
, asection
*);
12463 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12464 dwarf2_locate_common_dwp_sections
,
12467 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12470 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12473 /* The DWP file version is stored in the hash table. Oh well. */
12474 if (dwp_file
->cus
&& dwp_file
->tus
12475 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12477 /* Technically speaking, we should try to limp along, but this is
12478 pretty bizarre. We use pulongest here because that's the established
12479 portability solution (e.g, we cannot use %u for uint32_t). */
12480 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12481 " TU version %s [in DWP file %s]"),
12482 pulongest (dwp_file
->cus
->version
),
12483 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12487 dwp_file
->version
= dwp_file
->cus
->version
;
12488 else if (dwp_file
->tus
)
12489 dwp_file
->version
= dwp_file
->tus
->version
;
12491 dwp_file
->version
= 2;
12493 if (dwp_file
->version
== 2)
12494 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12495 dwarf2_locate_v2_dwp_sections
,
12498 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12499 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12501 if (dwarf_read_debug
)
12503 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12504 fprintf_unfiltered (gdb_stdlog
,
12505 " %s CUs, %s TUs\n",
12506 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12507 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12513 /* Wrapper around open_and_init_dwp_file, only open it once. */
12515 static struct dwp_file
*
12516 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12518 if (! dwarf2_per_objfile
->dwp_checked
)
12520 dwarf2_per_objfile
->dwp_file
12521 = open_and_init_dwp_file (dwarf2_per_objfile
);
12522 dwarf2_per_objfile
->dwp_checked
= 1;
12524 return dwarf2_per_objfile
->dwp_file
.get ();
12527 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12528 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12529 or in the DWP file for the objfile, referenced by THIS_UNIT.
12530 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12531 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12533 This is called, for example, when wanting to read a variable with a
12534 complex location. Therefore we don't want to do file i/o for every call.
12535 Therefore we don't want to look for a DWO file on every call.
12536 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12537 then we check if we've already seen DWO_NAME, and only THEN do we check
12540 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12541 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12543 static struct dwo_unit
*
12544 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12545 const char *dwo_name
, const char *comp_dir
,
12546 ULONGEST signature
, int is_debug_types
)
12548 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12549 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12550 const char *kind
= is_debug_types
? "TU" : "CU";
12551 void **dwo_file_slot
;
12552 struct dwo_file
*dwo_file
;
12553 struct dwp_file
*dwp_file
;
12555 /* First see if there's a DWP file.
12556 If we have a DWP file but didn't find the DWO inside it, don't
12557 look for the original DWO file. It makes gdb behave differently
12558 depending on whether one is debugging in the build tree. */
12560 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12561 if (dwp_file
!= NULL
)
12563 const struct dwp_hash_table
*dwp_htab
=
12564 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12566 if (dwp_htab
!= NULL
)
12568 struct dwo_unit
*dwo_cutu
=
12569 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12570 signature
, is_debug_types
);
12572 if (dwo_cutu
!= NULL
)
12574 if (dwarf_read_debug
)
12576 fprintf_unfiltered (gdb_stdlog
,
12577 "Virtual DWO %s %s found: @%s\n",
12578 kind
, hex_string (signature
),
12579 host_address_to_string (dwo_cutu
));
12587 /* No DWP file, look for the DWO file. */
12589 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12590 dwo_name
, comp_dir
);
12591 if (*dwo_file_slot
== NULL
)
12593 /* Read in the file and build a table of the CUs/TUs it contains. */
12594 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12596 /* NOTE: This will be NULL if unable to open the file. */
12597 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12599 if (dwo_file
!= NULL
)
12601 struct dwo_unit
*dwo_cutu
= NULL
;
12603 if (is_debug_types
&& dwo_file
->tus
)
12605 struct dwo_unit find_dwo_cutu
;
12607 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12608 find_dwo_cutu
.signature
= signature
;
12610 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12613 else if (!is_debug_types
&& dwo_file
->cus
)
12615 struct dwo_unit find_dwo_cutu
;
12617 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12618 find_dwo_cutu
.signature
= signature
;
12619 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12623 if (dwo_cutu
!= NULL
)
12625 if (dwarf_read_debug
)
12627 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12628 kind
, dwo_name
, hex_string (signature
),
12629 host_address_to_string (dwo_cutu
));
12636 /* We didn't find it. This could mean a dwo_id mismatch, or
12637 someone deleted the DWO/DWP file, or the search path isn't set up
12638 correctly to find the file. */
12640 if (dwarf_read_debug
)
12642 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12643 kind
, dwo_name
, hex_string (signature
));
12646 /* This is a warning and not a complaint because it can be caused by
12647 pilot error (e.g., user accidentally deleting the DWO). */
12649 /* Print the name of the DWP file if we looked there, helps the user
12650 better diagnose the problem. */
12651 std::string dwp_text
;
12653 if (dwp_file
!= NULL
)
12654 dwp_text
= string_printf (" [in DWP file %s]",
12655 lbasename (dwp_file
->name
));
12657 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12658 " [in module %s]"),
12659 kind
, dwo_name
, hex_string (signature
),
12661 this_unit
->is_debug_types
? "TU" : "CU",
12662 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12667 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12668 See lookup_dwo_cutu_unit for details. */
12670 static struct dwo_unit
*
12671 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12672 const char *dwo_name
, const char *comp_dir
,
12673 ULONGEST signature
)
12675 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12678 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12679 See lookup_dwo_cutu_unit for details. */
12681 static struct dwo_unit
*
12682 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12683 const char *dwo_name
, const char *comp_dir
)
12685 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12688 /* Traversal function for queue_and_load_all_dwo_tus. */
12691 queue_and_load_dwo_tu (void **slot
, void *info
)
12693 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12694 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12695 ULONGEST signature
= dwo_unit
->signature
;
12696 struct signatured_type
*sig_type
=
12697 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12699 if (sig_type
!= NULL
)
12701 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12703 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12704 a real dependency of PER_CU on SIG_TYPE. That is detected later
12705 while processing PER_CU. */
12706 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12707 load_full_type_unit (sig_cu
);
12708 per_cu
->imported_symtabs_push (sig_cu
);
12714 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12715 The DWO may have the only definition of the type, though it may not be
12716 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12717 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12720 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12722 struct dwo_unit
*dwo_unit
;
12723 struct dwo_file
*dwo_file
;
12725 gdb_assert (!per_cu
->is_debug_types
);
12726 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12727 gdb_assert (per_cu
->cu
!= NULL
);
12729 dwo_unit
= per_cu
->cu
->dwo_unit
;
12730 gdb_assert (dwo_unit
!= NULL
);
12732 dwo_file
= dwo_unit
->dwo_file
;
12733 if (dwo_file
->tus
!= NULL
)
12734 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12738 /* Read in various DIEs. */
12740 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12741 Inherit only the children of the DW_AT_abstract_origin DIE not being
12742 already referenced by DW_AT_abstract_origin from the children of the
12746 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12748 struct die_info
*child_die
;
12749 sect_offset
*offsetp
;
12750 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12751 struct die_info
*origin_die
;
12752 /* Iterator of the ORIGIN_DIE children. */
12753 struct die_info
*origin_child_die
;
12754 struct attribute
*attr
;
12755 struct dwarf2_cu
*origin_cu
;
12756 struct pending
**origin_previous_list_in_scope
;
12758 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12762 /* Note that following die references may follow to a die in a
12766 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12768 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12770 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12771 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12773 if (die
->tag
!= origin_die
->tag
12774 && !(die
->tag
== DW_TAG_inlined_subroutine
12775 && origin_die
->tag
== DW_TAG_subprogram
))
12776 complaint (_("DIE %s and its abstract origin %s have different tags"),
12777 sect_offset_str (die
->sect_off
),
12778 sect_offset_str (origin_die
->sect_off
));
12780 std::vector
<sect_offset
> offsets
;
12782 for (child_die
= die
->child
;
12783 child_die
&& child_die
->tag
;
12784 child_die
= child_die
->sibling
)
12786 struct die_info
*child_origin_die
;
12787 struct dwarf2_cu
*child_origin_cu
;
12789 /* We are trying to process concrete instance entries:
12790 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12791 it's not relevant to our analysis here. i.e. detecting DIEs that are
12792 present in the abstract instance but not referenced in the concrete
12794 if (child_die
->tag
== DW_TAG_call_site
12795 || child_die
->tag
== DW_TAG_GNU_call_site
)
12798 /* For each CHILD_DIE, find the corresponding child of
12799 ORIGIN_DIE. If there is more than one layer of
12800 DW_AT_abstract_origin, follow them all; there shouldn't be,
12801 but GCC versions at least through 4.4 generate this (GCC PR
12803 child_origin_die
= child_die
;
12804 child_origin_cu
= cu
;
12807 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12811 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12815 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12816 counterpart may exist. */
12817 if (child_origin_die
!= child_die
)
12819 if (child_die
->tag
!= child_origin_die
->tag
12820 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12821 && child_origin_die
->tag
== DW_TAG_subprogram
))
12822 complaint (_("Child DIE %s and its abstract origin %s have "
12824 sect_offset_str (child_die
->sect_off
),
12825 sect_offset_str (child_origin_die
->sect_off
));
12826 if (child_origin_die
->parent
!= origin_die
)
12827 complaint (_("Child DIE %s and its abstract origin %s have "
12828 "different parents"),
12829 sect_offset_str (child_die
->sect_off
),
12830 sect_offset_str (child_origin_die
->sect_off
));
12832 offsets
.push_back (child_origin_die
->sect_off
);
12835 std::sort (offsets
.begin (), offsets
.end ());
12836 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12837 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12838 if (offsetp
[-1] == *offsetp
)
12839 complaint (_("Multiple children of DIE %s refer "
12840 "to DIE %s as their abstract origin"),
12841 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12843 offsetp
= offsets
.data ();
12844 origin_child_die
= origin_die
->child
;
12845 while (origin_child_die
&& origin_child_die
->tag
)
12847 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12848 while (offsetp
< offsets_end
12849 && *offsetp
< origin_child_die
->sect_off
)
12851 if (offsetp
>= offsets_end
12852 || *offsetp
> origin_child_die
->sect_off
)
12854 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12855 Check whether we're already processing ORIGIN_CHILD_DIE.
12856 This can happen with mutually referenced abstract_origins.
12858 if (!origin_child_die
->in_process
)
12859 process_die (origin_child_die
, origin_cu
);
12861 origin_child_die
= origin_child_die
->sibling
;
12863 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12865 if (cu
!= origin_cu
)
12866 compute_delayed_physnames (origin_cu
);
12870 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12872 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
12873 struct gdbarch
*gdbarch
= objfile
->arch ();
12874 struct context_stack
*newobj
;
12877 struct die_info
*child_die
;
12878 struct attribute
*attr
, *call_line
, *call_file
;
12880 CORE_ADDR baseaddr
;
12881 struct block
*block
;
12882 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12883 std::vector
<struct symbol
*> template_args
;
12884 struct template_symbol
*templ_func
= NULL
;
12888 /* If we do not have call site information, we can't show the
12889 caller of this inlined function. That's too confusing, so
12890 only use the scope for local variables. */
12891 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12892 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12893 if (call_line
== NULL
|| call_file
== NULL
)
12895 read_lexical_block_scope (die
, cu
);
12900 baseaddr
= objfile
->text_section_offset ();
12902 name
= dwarf2_name (die
, cu
);
12904 /* Ignore functions with missing or empty names. These are actually
12905 illegal according to the DWARF standard. */
12908 complaint (_("missing name for subprogram DIE at %s"),
12909 sect_offset_str (die
->sect_off
));
12913 /* Ignore functions with missing or invalid low and high pc attributes. */
12914 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12915 <= PC_BOUNDS_INVALID
)
12917 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12918 if (!attr
|| !DW_UNSND (attr
))
12919 complaint (_("cannot get low and high bounds "
12920 "for subprogram DIE at %s"),
12921 sect_offset_str (die
->sect_off
));
12925 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12926 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12928 /* If we have any template arguments, then we must allocate a
12929 different sort of symbol. */
12930 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
12932 if (child_die
->tag
== DW_TAG_template_type_param
12933 || child_die
->tag
== DW_TAG_template_value_param
)
12935 templ_func
= allocate_template_symbol (objfile
);
12936 templ_func
->subclass
= SYMBOL_TEMPLATE
;
12941 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
12942 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
12943 (struct symbol
*) templ_func
);
12945 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
12946 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
12949 /* If there is a location expression for DW_AT_frame_base, record
12951 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
12952 if (attr
!= nullptr)
12953 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
12955 /* If there is a location for the static link, record it. */
12956 newobj
->static_link
= NULL
;
12957 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
12958 if (attr
!= nullptr)
12960 newobj
->static_link
12961 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
12962 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
12963 cu
->per_cu
->addr_type ());
12966 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
12968 if (die
->child
!= NULL
)
12970 child_die
= die
->child
;
12971 while (child_die
&& child_die
->tag
)
12973 if (child_die
->tag
== DW_TAG_template_type_param
12974 || child_die
->tag
== DW_TAG_template_value_param
)
12976 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12979 template_args
.push_back (arg
);
12982 process_die (child_die
, cu
);
12983 child_die
= child_die
->sibling
;
12987 inherit_abstract_dies (die
, cu
);
12989 /* If we have a DW_AT_specification, we might need to import using
12990 directives from the context of the specification DIE. See the
12991 comment in determine_prefix. */
12992 if (cu
->language
== language_cplus
12993 && dwarf2_attr (die
, DW_AT_specification
, cu
))
12995 struct dwarf2_cu
*spec_cu
= cu
;
12996 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13000 child_die
= spec_die
->child
;
13001 while (child_die
&& child_die
->tag
)
13003 if (child_die
->tag
== DW_TAG_imported_module
)
13004 process_die (child_die
, spec_cu
);
13005 child_die
= child_die
->sibling
;
13008 /* In some cases, GCC generates specification DIEs that
13009 themselves contain DW_AT_specification attributes. */
13010 spec_die
= die_specification (spec_die
, &spec_cu
);
13014 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13015 /* Make a block for the local symbols within. */
13016 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13017 cstk
.static_link
, lowpc
, highpc
);
13019 /* For C++, set the block's scope. */
13020 if ((cu
->language
== language_cplus
13021 || cu
->language
== language_fortran
13022 || cu
->language
== language_d
13023 || cu
->language
== language_rust
)
13024 && cu
->processing_has_namespace_info
)
13025 block_set_scope (block
, determine_prefix (die
, cu
),
13026 &objfile
->objfile_obstack
);
13028 /* If we have address ranges, record them. */
13029 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13031 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13033 /* Attach template arguments to function. */
13034 if (!template_args
.empty ())
13036 gdb_assert (templ_func
!= NULL
);
13038 templ_func
->n_template_arguments
= template_args
.size ();
13039 templ_func
->template_arguments
13040 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13041 templ_func
->n_template_arguments
);
13042 memcpy (templ_func
->template_arguments
,
13043 template_args
.data (),
13044 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13046 /* Make sure that the symtab is set on the new symbols. Even
13047 though they don't appear in this symtab directly, other parts
13048 of gdb assume that symbols do, and this is reasonably
13050 for (symbol
*sym
: template_args
)
13051 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13054 /* In C++, we can have functions nested inside functions (e.g., when
13055 a function declares a class that has methods). This means that
13056 when we finish processing a function scope, we may need to go
13057 back to building a containing block's symbol lists. */
13058 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13059 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13061 /* If we've finished processing a top-level function, subsequent
13062 symbols go in the file symbol list. */
13063 if (cu
->get_builder ()->outermost_context_p ())
13064 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13067 /* Process all the DIES contained within a lexical block scope. Start
13068 a new scope, process the dies, and then close the scope. */
13071 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13073 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13074 struct gdbarch
*gdbarch
= objfile
->arch ();
13075 CORE_ADDR lowpc
, highpc
;
13076 struct die_info
*child_die
;
13077 CORE_ADDR baseaddr
;
13079 baseaddr
= objfile
->text_section_offset ();
13081 /* Ignore blocks with missing or invalid low and high pc attributes. */
13082 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13083 as multiple lexical blocks? Handling children in a sane way would
13084 be nasty. Might be easier to properly extend generic blocks to
13085 describe ranges. */
13086 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13088 case PC_BOUNDS_NOT_PRESENT
:
13089 /* DW_TAG_lexical_block has no attributes, process its children as if
13090 there was no wrapping by that DW_TAG_lexical_block.
13091 GCC does no longer produces such DWARF since GCC r224161. */
13092 for (child_die
= die
->child
;
13093 child_die
!= NULL
&& child_die
->tag
;
13094 child_die
= child_die
->sibling
)
13095 process_die (child_die
, cu
);
13097 case PC_BOUNDS_INVALID
:
13100 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13101 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13103 cu
->get_builder ()->push_context (0, lowpc
);
13104 if (die
->child
!= NULL
)
13106 child_die
= die
->child
;
13107 while (child_die
&& child_die
->tag
)
13109 process_die (child_die
, cu
);
13110 child_die
= child_die
->sibling
;
13113 inherit_abstract_dies (die
, cu
);
13114 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13116 if (*cu
->get_builder ()->get_local_symbols () != NULL
13117 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13119 struct block
*block
13120 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13121 cstk
.start_addr
, highpc
);
13123 /* Note that recording ranges after traversing children, as we
13124 do here, means that recording a parent's ranges entails
13125 walking across all its children's ranges as they appear in
13126 the address map, which is quadratic behavior.
13128 It would be nicer to record the parent's ranges before
13129 traversing its children, simply overriding whatever you find
13130 there. But since we don't even decide whether to create a
13131 block until after we've traversed its children, that's hard
13133 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13135 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13136 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13139 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13142 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13144 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13145 struct gdbarch
*gdbarch
= objfile
->arch ();
13146 CORE_ADDR pc
, baseaddr
;
13147 struct attribute
*attr
;
13148 struct call_site
*call_site
, call_site_local
;
13151 struct die_info
*child_die
;
13153 baseaddr
= objfile
->text_section_offset ();
13155 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13158 /* This was a pre-DWARF-5 GNU extension alias
13159 for DW_AT_call_return_pc. */
13160 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13164 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13165 "DIE %s [in module %s]"),
13166 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13169 pc
= attr
->value_as_address () + baseaddr
;
13170 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13172 if (cu
->call_site_htab
== NULL
)
13173 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13174 NULL
, &objfile
->objfile_obstack
,
13175 hashtab_obstack_allocate
, NULL
);
13176 call_site_local
.pc
= pc
;
13177 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13180 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13181 "DIE %s [in module %s]"),
13182 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13183 objfile_name (objfile
));
13187 /* Count parameters at the caller. */
13190 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13191 child_die
= child_die
->sibling
)
13193 if (child_die
->tag
!= DW_TAG_call_site_parameter
13194 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13196 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13197 "DW_TAG_call_site child DIE %s [in module %s]"),
13198 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13199 objfile_name (objfile
));
13207 = ((struct call_site
*)
13208 obstack_alloc (&objfile
->objfile_obstack
,
13209 sizeof (*call_site
)
13210 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13212 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13213 call_site
->pc
= pc
;
13215 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13216 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13218 struct die_info
*func_die
;
13220 /* Skip also over DW_TAG_inlined_subroutine. */
13221 for (func_die
= die
->parent
;
13222 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13223 && func_die
->tag
!= DW_TAG_subroutine_type
;
13224 func_die
= func_die
->parent
);
13226 /* DW_AT_call_all_calls is a superset
13227 of DW_AT_call_all_tail_calls. */
13229 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13230 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13231 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13232 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13234 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13235 not complete. But keep CALL_SITE for look ups via call_site_htab,
13236 both the initial caller containing the real return address PC and
13237 the final callee containing the current PC of a chain of tail
13238 calls do not need to have the tail call list complete. But any
13239 function candidate for a virtual tail call frame searched via
13240 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13241 determined unambiguously. */
13245 struct type
*func_type
= NULL
;
13248 func_type
= get_die_type (func_die
, cu
);
13249 if (func_type
!= NULL
)
13251 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13253 /* Enlist this call site to the function. */
13254 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13255 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13258 complaint (_("Cannot find function owning DW_TAG_call_site "
13259 "DIE %s [in module %s]"),
13260 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13264 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13266 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13268 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13271 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13272 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13274 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13275 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13276 /* Keep NULL DWARF_BLOCK. */;
13277 else if (attr
->form_is_block ())
13279 struct dwarf2_locexpr_baton
*dlbaton
;
13281 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13282 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13283 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13284 dlbaton
->per_cu
= cu
->per_cu
;
13286 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13288 else if (attr
->form_is_ref ())
13290 struct dwarf2_cu
*target_cu
= cu
;
13291 struct die_info
*target_die
;
13293 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13294 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13295 if (die_is_declaration (target_die
, target_cu
))
13297 const char *target_physname
;
13299 /* Prefer the mangled name; otherwise compute the demangled one. */
13300 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13301 if (target_physname
== NULL
)
13302 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13303 if (target_physname
== NULL
)
13304 complaint (_("DW_AT_call_target target DIE has invalid "
13305 "physname, for referencing DIE %s [in module %s]"),
13306 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13308 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13314 /* DW_AT_entry_pc should be preferred. */
13315 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13316 <= PC_BOUNDS_INVALID
)
13317 complaint (_("DW_AT_call_target target DIE has invalid "
13318 "low pc, for referencing DIE %s [in module %s]"),
13319 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13322 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13323 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13328 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13329 "block nor reference, for DIE %s [in module %s]"),
13330 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13332 call_site
->per_cu
= cu
->per_cu
;
13334 for (child_die
= die
->child
;
13335 child_die
&& child_die
->tag
;
13336 child_die
= child_die
->sibling
)
13338 struct call_site_parameter
*parameter
;
13339 struct attribute
*loc
, *origin
;
13341 if (child_die
->tag
!= DW_TAG_call_site_parameter
13342 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13344 /* Already printed the complaint above. */
13348 gdb_assert (call_site
->parameter_count
< nparams
);
13349 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13351 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13352 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13353 register is contained in DW_AT_call_value. */
13355 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13356 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13357 if (origin
== NULL
)
13359 /* This was a pre-DWARF-5 GNU extension alias
13360 for DW_AT_call_parameter. */
13361 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13363 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13365 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13367 sect_offset sect_off
= origin
->get_ref_die_offset ();
13368 if (!cu
->header
.offset_in_cu_p (sect_off
))
13370 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13371 binding can be done only inside one CU. Such referenced DIE
13372 therefore cannot be even moved to DW_TAG_partial_unit. */
13373 complaint (_("DW_AT_call_parameter offset is not in CU for "
13374 "DW_TAG_call_site child DIE %s [in module %s]"),
13375 sect_offset_str (child_die
->sect_off
),
13376 objfile_name (objfile
));
13379 parameter
->u
.param_cu_off
13380 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13382 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13384 complaint (_("No DW_FORM_block* DW_AT_location for "
13385 "DW_TAG_call_site child DIE %s [in module %s]"),
13386 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13391 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13392 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13393 if (parameter
->u
.dwarf_reg
!= -1)
13394 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13395 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13396 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13397 ¶meter
->u
.fb_offset
))
13398 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13401 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13402 "for DW_FORM_block* DW_AT_location is supported for "
13403 "DW_TAG_call_site child DIE %s "
13405 sect_offset_str (child_die
->sect_off
),
13406 objfile_name (objfile
));
13411 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13413 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13414 if (attr
== NULL
|| !attr
->form_is_block ())
13416 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13417 "DW_TAG_call_site child DIE %s [in module %s]"),
13418 sect_offset_str (child_die
->sect_off
),
13419 objfile_name (objfile
));
13422 parameter
->value
= DW_BLOCK (attr
)->data
;
13423 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13425 /* Parameters are not pre-cleared by memset above. */
13426 parameter
->data_value
= NULL
;
13427 parameter
->data_value_size
= 0;
13428 call_site
->parameter_count
++;
13430 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13432 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13433 if (attr
!= nullptr)
13435 if (!attr
->form_is_block ())
13436 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13437 "DW_TAG_call_site child DIE %s [in module %s]"),
13438 sect_offset_str (child_die
->sect_off
),
13439 objfile_name (objfile
));
13442 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13443 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13449 /* Helper function for read_variable. If DIE represents a virtual
13450 table, then return the type of the concrete object that is
13451 associated with the virtual table. Otherwise, return NULL. */
13453 static struct type
*
13454 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13456 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13460 /* Find the type DIE. */
13461 struct die_info
*type_die
= NULL
;
13462 struct dwarf2_cu
*type_cu
= cu
;
13464 if (attr
->form_is_ref ())
13465 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13466 if (type_die
== NULL
)
13469 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13471 return die_containing_type (type_die
, type_cu
);
13474 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13477 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13479 struct rust_vtable_symbol
*storage
= NULL
;
13481 if (cu
->language
== language_rust
)
13483 struct type
*containing_type
= rust_containing_type (die
, cu
);
13485 if (containing_type
!= NULL
)
13487 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13489 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol ();
13490 initialize_objfile_symbol (storage
);
13491 storage
->concrete_type
= containing_type
;
13492 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13496 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13497 struct attribute
*abstract_origin
13498 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13499 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13500 if (res
== NULL
&& loc
&& abstract_origin
)
13502 /* We have a variable without a name, but with a location and an abstract
13503 origin. This may be a concrete instance of an abstract variable
13504 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13506 struct dwarf2_cu
*origin_cu
= cu
;
13507 struct die_info
*origin_die
13508 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13509 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
13510 dpo
->abstract_to_concrete
[origin_die
->sect_off
].push_back (die
->sect_off
);
13514 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13515 reading .debug_rnglists.
13516 Callback's type should be:
13517 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13518 Return true if the attributes are present and valid, otherwise,
13521 template <typename Callback
>
13523 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13524 Callback
&&callback
)
13526 struct dwarf2_per_objfile
*dwarf2_per_objfile
13527 = cu
->per_cu
->dwarf2_per_objfile
;
13528 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13529 bfd
*obfd
= objfile
->obfd
;
13530 /* Base address selection entry. */
13531 gdb::optional
<CORE_ADDR
> base
;
13532 const gdb_byte
*buffer
;
13533 CORE_ADDR baseaddr
;
13534 bool overflow
= false;
13536 base
= cu
->base_address
;
13538 dwarf2_per_objfile
->rnglists
.read (objfile
);
13539 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
13541 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13545 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
13547 baseaddr
= objfile
->text_section_offset ();
13551 /* Initialize it due to a false compiler warning. */
13552 CORE_ADDR range_beginning
= 0, range_end
= 0;
13553 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
13554 + dwarf2_per_objfile
->rnglists
.size
);
13555 unsigned int bytes_read
;
13557 if (buffer
== buf_end
)
13562 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13565 case DW_RLE_end_of_list
:
13567 case DW_RLE_base_address
:
13568 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13573 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13574 buffer
+= bytes_read
;
13576 case DW_RLE_start_length
:
13577 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13582 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13584 buffer
+= bytes_read
;
13585 range_end
= (range_beginning
13586 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13587 buffer
+= bytes_read
;
13588 if (buffer
> buf_end
)
13594 case DW_RLE_offset_pair
:
13595 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13596 buffer
+= bytes_read
;
13597 if (buffer
> buf_end
)
13602 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13603 buffer
+= bytes_read
;
13604 if (buffer
> buf_end
)
13610 case DW_RLE_start_end
:
13611 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13616 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13618 buffer
+= bytes_read
;
13619 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13620 buffer
+= bytes_read
;
13623 complaint (_("Invalid .debug_rnglists data (no base address)"));
13626 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13628 if (rlet
== DW_RLE_base_address
)
13631 if (!base
.has_value ())
13633 /* We have no valid base address for the ranges
13635 complaint (_("Invalid .debug_rnglists data (no base address)"));
13639 if (range_beginning
> range_end
)
13641 /* Inverted range entries are invalid. */
13642 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13646 /* Empty range entries have no effect. */
13647 if (range_beginning
== range_end
)
13650 range_beginning
+= *base
;
13651 range_end
+= *base
;
13653 /* A not-uncommon case of bad debug info.
13654 Don't pollute the addrmap with bad data. */
13655 if (range_beginning
+ baseaddr
== 0
13656 && !dwarf2_per_objfile
->has_section_at_zero
)
13658 complaint (_(".debug_rnglists entry has start address of zero"
13659 " [in module %s]"), objfile_name (objfile
));
13663 callback (range_beginning
, range_end
);
13668 complaint (_("Offset %d is not terminated "
13669 "for DW_AT_ranges attribute"),
13677 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13678 Callback's type should be:
13679 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13680 Return 1 if the attributes are present and valid, otherwise, return 0. */
13682 template <typename Callback
>
13684 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13685 Callback
&&callback
)
13687 struct dwarf2_per_objfile
*dwarf2_per_objfile
13688 = cu
->per_cu
->dwarf2_per_objfile
;
13689 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13690 struct comp_unit_head
*cu_header
= &cu
->header
;
13691 bfd
*obfd
= objfile
->obfd
;
13692 unsigned int addr_size
= cu_header
->addr_size
;
13693 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13694 /* Base address selection entry. */
13695 gdb::optional
<CORE_ADDR
> base
;
13696 unsigned int dummy
;
13697 const gdb_byte
*buffer
;
13698 CORE_ADDR baseaddr
;
13700 if (cu_header
->version
>= 5)
13701 return dwarf2_rnglists_process (offset
, cu
, callback
);
13703 base
= cu
->base_address
;
13705 dwarf2_per_objfile
->ranges
.read (objfile
);
13706 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
13708 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13712 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
13714 baseaddr
= objfile
->text_section_offset ();
13718 CORE_ADDR range_beginning
, range_end
;
13720 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13721 buffer
+= addr_size
;
13722 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13723 buffer
+= addr_size
;
13724 offset
+= 2 * addr_size
;
13726 /* An end of list marker is a pair of zero addresses. */
13727 if (range_beginning
== 0 && range_end
== 0)
13728 /* Found the end of list entry. */
13731 /* Each base address selection entry is a pair of 2 values.
13732 The first is the largest possible address, the second is
13733 the base address. Check for a base address here. */
13734 if ((range_beginning
& mask
) == mask
)
13736 /* If we found the largest possible address, then we already
13737 have the base address in range_end. */
13742 if (!base
.has_value ())
13744 /* We have no valid base address for the ranges
13746 complaint (_("Invalid .debug_ranges data (no base address)"));
13750 if (range_beginning
> range_end
)
13752 /* Inverted range entries are invalid. */
13753 complaint (_("Invalid .debug_ranges data (inverted range)"));
13757 /* Empty range entries have no effect. */
13758 if (range_beginning
== range_end
)
13761 range_beginning
+= *base
;
13762 range_end
+= *base
;
13764 /* A not-uncommon case of bad debug info.
13765 Don't pollute the addrmap with bad data. */
13766 if (range_beginning
+ baseaddr
== 0
13767 && !dwarf2_per_objfile
->has_section_at_zero
)
13769 complaint (_(".debug_ranges entry has start address of zero"
13770 " [in module %s]"), objfile_name (objfile
));
13774 callback (range_beginning
, range_end
);
13780 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13781 Return 1 if the attributes are present and valid, otherwise, return 0.
13782 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13785 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13786 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13787 dwarf2_psymtab
*ranges_pst
)
13789 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13790 struct gdbarch
*gdbarch
= objfile
->arch ();
13791 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13794 CORE_ADDR high
= 0;
13797 retval
= dwarf2_ranges_process (offset
, cu
,
13798 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13800 if (ranges_pst
!= NULL
)
13805 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13806 range_beginning
+ baseaddr
)
13808 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13809 range_end
+ baseaddr
)
13811 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13812 lowpc
, highpc
- 1, ranges_pst
);
13815 /* FIXME: This is recording everything as a low-high
13816 segment of consecutive addresses. We should have a
13817 data structure for discontiguous block ranges
13821 low
= range_beginning
;
13827 if (range_beginning
< low
)
13828 low
= range_beginning
;
13829 if (range_end
> high
)
13837 /* If the first entry is an end-of-list marker, the range
13838 describes an empty scope, i.e. no instructions. */
13844 *high_return
= high
;
13848 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13849 definition for the return value. *LOWPC and *HIGHPC are set iff
13850 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13852 static enum pc_bounds_kind
13853 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13854 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13855 dwarf2_psymtab
*pst
)
13857 struct dwarf2_per_objfile
*dwarf2_per_objfile
13858 = cu
->per_cu
->dwarf2_per_objfile
;
13859 struct attribute
*attr
;
13860 struct attribute
*attr_high
;
13862 CORE_ADDR high
= 0;
13863 enum pc_bounds_kind ret
;
13865 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13868 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13869 if (attr
!= nullptr)
13871 low
= attr
->value_as_address ();
13872 high
= attr_high
->value_as_address ();
13873 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
13877 /* Found high w/o low attribute. */
13878 return PC_BOUNDS_INVALID
;
13880 /* Found consecutive range of addresses. */
13881 ret
= PC_BOUNDS_HIGH_LOW
;
13885 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13888 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
13889 We take advantage of the fact that DW_AT_ranges does not appear
13890 in DW_TAG_compile_unit of DWO files. */
13891 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13892 unsigned int ranges_offset
= (DW_UNSND (attr
)
13893 + (need_ranges_base
13897 /* Value of the DW_AT_ranges attribute is the offset in the
13898 .debug_ranges section. */
13899 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13900 return PC_BOUNDS_INVALID
;
13901 /* Found discontinuous range of addresses. */
13902 ret
= PC_BOUNDS_RANGES
;
13905 return PC_BOUNDS_NOT_PRESENT
;
13908 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
13910 return PC_BOUNDS_INVALID
;
13912 /* When using the GNU linker, .gnu.linkonce. sections are used to
13913 eliminate duplicate copies of functions and vtables and such.
13914 The linker will arbitrarily choose one and discard the others.
13915 The AT_*_pc values for such functions refer to local labels in
13916 these sections. If the section from that file was discarded, the
13917 labels are not in the output, so the relocs get a value of 0.
13918 If this is a discarded function, mark the pc bounds as invalid,
13919 so that GDB will ignore it. */
13920 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13921 return PC_BOUNDS_INVALID
;
13929 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13930 its low and high PC addresses. Do nothing if these addresses could not
13931 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13932 and HIGHPC to the high address if greater than HIGHPC. */
13935 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13936 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13937 struct dwarf2_cu
*cu
)
13939 CORE_ADDR low
, high
;
13940 struct die_info
*child
= die
->child
;
13942 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
13944 *lowpc
= std::min (*lowpc
, low
);
13945 *highpc
= std::max (*highpc
, high
);
13948 /* If the language does not allow nested subprograms (either inside
13949 subprograms or lexical blocks), we're done. */
13950 if (cu
->language
!= language_ada
)
13953 /* Check all the children of the given DIE. If it contains nested
13954 subprograms, then check their pc bounds. Likewise, we need to
13955 check lexical blocks as well, as they may also contain subprogram
13957 while (child
&& child
->tag
)
13959 if (child
->tag
== DW_TAG_subprogram
13960 || child
->tag
== DW_TAG_lexical_block
)
13961 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
13962 child
= child
->sibling
;
13966 /* Get the low and high pc's represented by the scope DIE, and store
13967 them in *LOWPC and *HIGHPC. If the correct values can't be
13968 determined, set *LOWPC to -1 and *HIGHPC to 0. */
13971 get_scope_pc_bounds (struct die_info
*die
,
13972 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13973 struct dwarf2_cu
*cu
)
13975 CORE_ADDR best_low
= (CORE_ADDR
) -1;
13976 CORE_ADDR best_high
= (CORE_ADDR
) 0;
13977 CORE_ADDR current_low
, current_high
;
13979 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
13980 >= PC_BOUNDS_RANGES
)
13982 best_low
= current_low
;
13983 best_high
= current_high
;
13987 struct die_info
*child
= die
->child
;
13989 while (child
&& child
->tag
)
13991 switch (child
->tag
) {
13992 case DW_TAG_subprogram
:
13993 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
13995 case DW_TAG_namespace
:
13996 case DW_TAG_module
:
13997 /* FIXME: carlton/2004-01-16: Should we do this for
13998 DW_TAG_class_type/DW_TAG_structure_type, too? I think
13999 that current GCC's always emit the DIEs corresponding
14000 to definitions of methods of classes as children of a
14001 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14002 the DIEs giving the declarations, which could be
14003 anywhere). But I don't see any reason why the
14004 standards says that they have to be there. */
14005 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14007 if (current_low
!= ((CORE_ADDR
) -1))
14009 best_low
= std::min (best_low
, current_low
);
14010 best_high
= std::max (best_high
, current_high
);
14018 child
= child
->sibling
;
14023 *highpc
= best_high
;
14026 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14030 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14031 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14033 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14034 struct gdbarch
*gdbarch
= objfile
->arch ();
14035 struct attribute
*attr
;
14036 struct attribute
*attr_high
;
14038 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14041 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14042 if (attr
!= nullptr)
14044 CORE_ADDR low
= attr
->value_as_address ();
14045 CORE_ADDR high
= attr_high
->value_as_address ();
14047 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14050 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14051 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14052 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14056 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14057 if (attr
!= nullptr)
14059 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14060 We take advantage of the fact that DW_AT_ranges does not appear
14061 in DW_TAG_compile_unit of DWO files. */
14062 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14064 /* The value of the DW_AT_ranges attribute is the offset of the
14065 address range list in the .debug_ranges section. */
14066 unsigned long offset
= (DW_UNSND (attr
)
14067 + (need_ranges_base
? cu
->ranges_base
: 0));
14069 std::vector
<blockrange
> blockvec
;
14070 dwarf2_ranges_process (offset
, cu
,
14071 [&] (CORE_ADDR start
, CORE_ADDR end
)
14075 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14076 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14077 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14078 blockvec
.emplace_back (start
, end
);
14081 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14085 /* Check whether the producer field indicates either of GCC < 4.6, or the
14086 Intel C/C++ compiler, and cache the result in CU. */
14089 check_producer (struct dwarf2_cu
*cu
)
14093 if (cu
->producer
== NULL
)
14095 /* For unknown compilers expect their behavior is DWARF version
14098 GCC started to support .debug_types sections by -gdwarf-4 since
14099 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14100 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14101 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14102 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14104 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14106 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14107 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14109 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14111 cu
->producer_is_icc
= true;
14112 cu
->producer_is_icc_lt_14
= major
< 14;
14114 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14115 cu
->producer_is_codewarrior
= true;
14118 /* For other non-GCC compilers, expect their behavior is DWARF version
14122 cu
->checked_producer
= true;
14125 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14126 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14127 during 4.6.0 experimental. */
14130 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14132 if (!cu
->checked_producer
)
14133 check_producer (cu
);
14135 return cu
->producer_is_gxx_lt_4_6
;
14139 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14140 with incorrect is_stmt attributes. */
14143 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14145 if (!cu
->checked_producer
)
14146 check_producer (cu
);
14148 return cu
->producer_is_codewarrior
;
14151 /* Return the default accessibility type if it is not overridden by
14152 DW_AT_accessibility. */
14154 static enum dwarf_access_attribute
14155 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14157 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14159 /* The default DWARF 2 accessibility for members is public, the default
14160 accessibility for inheritance is private. */
14162 if (die
->tag
!= DW_TAG_inheritance
)
14163 return DW_ACCESS_public
;
14165 return DW_ACCESS_private
;
14169 /* DWARF 3+ defines the default accessibility a different way. The same
14170 rules apply now for DW_TAG_inheritance as for the members and it only
14171 depends on the container kind. */
14173 if (die
->parent
->tag
== DW_TAG_class_type
)
14174 return DW_ACCESS_private
;
14176 return DW_ACCESS_public
;
14180 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14181 offset. If the attribute was not found return 0, otherwise return
14182 1. If it was found but could not properly be handled, set *OFFSET
14186 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14189 struct attribute
*attr
;
14191 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14196 /* Note that we do not check for a section offset first here.
14197 This is because DW_AT_data_member_location is new in DWARF 4,
14198 so if we see it, we can assume that a constant form is really
14199 a constant and not a section offset. */
14200 if (attr
->form_is_constant ())
14201 *offset
= attr
->constant_value (0);
14202 else if (attr
->form_is_section_offset ())
14203 dwarf2_complex_location_expr_complaint ();
14204 else if (attr
->form_is_block ())
14205 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14207 dwarf2_complex_location_expr_complaint ();
14215 /* Add an aggregate field to the field list. */
14218 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14219 struct dwarf2_cu
*cu
)
14221 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14222 struct gdbarch
*gdbarch
= objfile
->arch ();
14223 struct nextfield
*new_field
;
14224 struct attribute
*attr
;
14226 const char *fieldname
= "";
14228 if (die
->tag
== DW_TAG_inheritance
)
14230 fip
->baseclasses
.emplace_back ();
14231 new_field
= &fip
->baseclasses
.back ();
14235 fip
->fields
.emplace_back ();
14236 new_field
= &fip
->fields
.back ();
14239 new_field
->offset
= die
->sect_off
;
14241 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14242 if (attr
!= nullptr)
14243 new_field
->accessibility
= DW_UNSND (attr
);
14245 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14246 if (new_field
->accessibility
!= DW_ACCESS_public
)
14247 fip
->non_public_fields
= 1;
14249 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14250 if (attr
!= nullptr)
14251 new_field
->virtuality
= DW_UNSND (attr
);
14253 new_field
->virtuality
= DW_VIRTUALITY_none
;
14255 fp
= &new_field
->field
;
14257 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14261 /* Data member other than a C++ static data member. */
14263 /* Get type of field. */
14264 fp
->type
= die_type (die
, cu
);
14266 SET_FIELD_BITPOS (*fp
, 0);
14268 /* Get bit size of field (zero if none). */
14269 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14270 if (attr
!= nullptr)
14272 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14276 FIELD_BITSIZE (*fp
) = 0;
14279 /* Get bit offset of field. */
14280 if (handle_data_member_location (die
, cu
, &offset
))
14281 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14282 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14283 if (attr
!= nullptr)
14285 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14287 /* For big endian bits, the DW_AT_bit_offset gives the
14288 additional bit offset from the MSB of the containing
14289 anonymous object to the MSB of the field. We don't
14290 have to do anything special since we don't need to
14291 know the size of the anonymous object. */
14292 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14296 /* For little endian bits, compute the bit offset to the
14297 MSB of the anonymous object, subtract off the number of
14298 bits from the MSB of the field to the MSB of the
14299 object, and then subtract off the number of bits of
14300 the field itself. The result is the bit offset of
14301 the LSB of the field. */
14302 int anonymous_size
;
14303 int bit_offset
= DW_UNSND (attr
);
14305 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14306 if (attr
!= nullptr)
14308 /* The size of the anonymous object containing
14309 the bit field is explicit, so use the
14310 indicated size (in bytes). */
14311 anonymous_size
= DW_UNSND (attr
);
14315 /* The size of the anonymous object containing
14316 the bit field must be inferred from the type
14317 attribute of the data member containing the
14319 anonymous_size
= TYPE_LENGTH (fp
->type
);
14321 SET_FIELD_BITPOS (*fp
,
14322 (FIELD_BITPOS (*fp
)
14323 + anonymous_size
* bits_per_byte
14324 - bit_offset
- FIELD_BITSIZE (*fp
)));
14327 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14329 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14330 + attr
->constant_value (0)));
14332 /* Get name of field. */
14333 fieldname
= dwarf2_name (die
, cu
);
14334 if (fieldname
== NULL
)
14337 /* The name is already allocated along with this objfile, so we don't
14338 need to duplicate it for the type. */
14339 fp
->name
= fieldname
;
14341 /* Change accessibility for artificial fields (e.g. virtual table
14342 pointer or virtual base class pointer) to private. */
14343 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14345 FIELD_ARTIFICIAL (*fp
) = 1;
14346 new_field
->accessibility
= DW_ACCESS_private
;
14347 fip
->non_public_fields
= 1;
14350 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14352 /* C++ static member. */
14354 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14355 is a declaration, but all versions of G++ as of this writing
14356 (so through at least 3.2.1) incorrectly generate
14357 DW_TAG_variable tags. */
14359 const char *physname
;
14361 /* Get name of field. */
14362 fieldname
= dwarf2_name (die
, cu
);
14363 if (fieldname
== NULL
)
14366 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14368 /* Only create a symbol if this is an external value.
14369 new_symbol checks this and puts the value in the global symbol
14370 table, which we want. If it is not external, new_symbol
14371 will try to put the value in cu->list_in_scope which is wrong. */
14372 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14374 /* A static const member, not much different than an enum as far as
14375 we're concerned, except that we can support more types. */
14376 new_symbol (die
, NULL
, cu
);
14379 /* Get physical name. */
14380 physname
= dwarf2_physname (fieldname
, die
, cu
);
14382 /* The name is already allocated along with this objfile, so we don't
14383 need to duplicate it for the type. */
14384 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14385 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14386 FIELD_NAME (*fp
) = fieldname
;
14388 else if (die
->tag
== DW_TAG_inheritance
)
14392 /* C++ base class field. */
14393 if (handle_data_member_location (die
, cu
, &offset
))
14394 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14395 FIELD_BITSIZE (*fp
) = 0;
14396 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14397 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
14400 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14403 /* Can the type given by DIE define another type? */
14406 type_can_define_types (const struct die_info
*die
)
14410 case DW_TAG_typedef
:
14411 case DW_TAG_class_type
:
14412 case DW_TAG_structure_type
:
14413 case DW_TAG_union_type
:
14414 case DW_TAG_enumeration_type
:
14422 /* Add a type definition defined in the scope of the FIP's class. */
14425 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14426 struct dwarf2_cu
*cu
)
14428 struct decl_field fp
;
14429 memset (&fp
, 0, sizeof (fp
));
14431 gdb_assert (type_can_define_types (die
));
14433 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14434 fp
.name
= dwarf2_name (die
, cu
);
14435 fp
.type
= read_type_die (die
, cu
);
14437 /* Save accessibility. */
14438 enum dwarf_access_attribute accessibility
;
14439 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14441 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14443 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14444 switch (accessibility
)
14446 case DW_ACCESS_public
:
14447 /* The assumed value if neither private nor protected. */
14449 case DW_ACCESS_private
:
14452 case DW_ACCESS_protected
:
14453 fp
.is_protected
= 1;
14456 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14459 if (die
->tag
== DW_TAG_typedef
)
14460 fip
->typedef_field_list
.push_back (fp
);
14462 fip
->nested_types_list
.push_back (fp
);
14465 /* A convenience typedef that's used when finding the discriminant
14466 field for a variant part. */
14467 typedef std::unordered_map
<sect_offset
, int> offset_map_type
;
14469 /* Compute the discriminant range for a given variant. OBSTACK is
14470 where the results will be stored. VARIANT is the variant to
14471 process. IS_UNSIGNED indicates whether the discriminant is signed
14474 static const gdb::array_view
<discriminant_range
>
14475 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14478 std::vector
<discriminant_range
> ranges
;
14480 if (variant
.default_branch
)
14483 if (variant
.discr_list_data
== nullptr)
14485 discriminant_range r
14486 = {variant
.discriminant_value
, variant
.discriminant_value
};
14487 ranges
.push_back (r
);
14491 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14492 variant
.discr_list_data
->size
);
14493 while (!data
.empty ())
14495 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14497 complaint (_("invalid discriminant marker: %d"), data
[0]);
14500 bool is_range
= data
[0] == DW_DSC_range
;
14501 data
= data
.slice (1);
14503 ULONGEST low
, high
;
14504 unsigned int bytes_read
;
14508 complaint (_("DW_AT_discr_list missing low value"));
14512 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14514 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14516 data
= data
.slice (bytes_read
);
14522 complaint (_("DW_AT_discr_list missing high value"));
14526 high
= read_unsigned_leb128 (nullptr, data
.data (),
14529 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14531 data
= data
.slice (bytes_read
);
14536 ranges
.push_back ({ low
, high
});
14540 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14542 std::copy (ranges
.begin (), ranges
.end (), result
);
14543 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14546 static const gdb::array_view
<variant_part
> create_variant_parts
14547 (struct obstack
*obstack
,
14548 const offset_map_type
&offset_map
,
14549 struct field_info
*fi
,
14550 const std::vector
<variant_part_builder
> &variant_parts
);
14552 /* Fill in a "struct variant" for a given variant field. RESULT is
14553 the variant to fill in. OBSTACK is where any needed allocations
14554 will be done. OFFSET_MAP holds the mapping from section offsets to
14555 fields for the type. FI describes the fields of the type we're
14556 processing. FIELD is the variant field we're converting. */
14559 create_one_variant (variant
&result
, struct obstack
*obstack
,
14560 const offset_map_type
&offset_map
,
14561 struct field_info
*fi
, const variant_field
&field
)
14563 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14564 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14565 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14566 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14567 field
.variant_parts
);
14570 /* Fill in a "struct variant_part" for a given variant part. RESULT
14571 is the variant part to fill in. OBSTACK is where any needed
14572 allocations will be done. OFFSET_MAP holds the mapping from
14573 section offsets to fields for the type. FI describes the fields of
14574 the type we're processing. BUILDER is the variant part to be
14578 create_one_variant_part (variant_part
&result
,
14579 struct obstack
*obstack
,
14580 const offset_map_type
&offset_map
,
14581 struct field_info
*fi
,
14582 const variant_part_builder
&builder
)
14584 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14585 if (iter
== offset_map
.end ())
14587 result
.discriminant_index
= -1;
14588 /* Doesn't matter. */
14589 result
.is_unsigned
= false;
14593 result
.discriminant_index
= iter
->second
;
14595 = TYPE_UNSIGNED (FIELD_TYPE
14596 (fi
->fields
[result
.discriminant_index
].field
));
14599 size_t n
= builder
.variants
.size ();
14600 variant
*output
= new (obstack
) variant
[n
];
14601 for (size_t i
= 0; i
< n
; ++i
)
14602 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14603 builder
.variants
[i
]);
14605 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14608 /* Create a vector of variant parts that can be attached to a type.
14609 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14610 holds the mapping from section offsets to fields for the type. FI
14611 describes the fields of the type we're processing. VARIANT_PARTS
14612 is the vector to convert. */
14614 static const gdb::array_view
<variant_part
>
14615 create_variant_parts (struct obstack
*obstack
,
14616 const offset_map_type
&offset_map
,
14617 struct field_info
*fi
,
14618 const std::vector
<variant_part_builder
> &variant_parts
)
14620 if (variant_parts
.empty ())
14623 size_t n
= variant_parts
.size ();
14624 variant_part
*result
= new (obstack
) variant_part
[n
];
14625 for (size_t i
= 0; i
< n
; ++i
)
14626 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14629 return gdb::array_view
<variant_part
> (result
, n
);
14632 /* Compute the variant part vector for FIP, attaching it to TYPE when
14636 add_variant_property (struct field_info
*fip
, struct type
*type
,
14637 struct dwarf2_cu
*cu
)
14639 /* Map section offsets of fields to their field index. Note the
14640 field index here does not take the number of baseclasses into
14642 offset_map_type offset_map
;
14643 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14644 offset_map
[fip
->fields
[i
].offset
] = i
;
14646 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14647 gdb::array_view
<variant_part
> parts
14648 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14649 fip
->variant_parts
);
14651 struct dynamic_prop prop
;
14652 prop
.kind
= PROP_VARIANT_PARTS
;
14653 prop
.data
.variant_parts
14654 = ((gdb::array_view
<variant_part
> *)
14655 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14657 add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
, type
);
14660 /* Create the vector of fields, and attach it to the type. */
14663 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14664 struct dwarf2_cu
*cu
)
14666 int nfields
= fip
->nfields ();
14668 /* Record the field count, allocate space for the array of fields,
14669 and create blank accessibility bitfields if necessary. */
14670 TYPE_NFIELDS (type
) = nfields
;
14671 TYPE_FIELDS (type
) = (struct field
*)
14672 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
14674 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14676 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14678 TYPE_FIELD_PRIVATE_BITS (type
) =
14679 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14680 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14682 TYPE_FIELD_PROTECTED_BITS (type
) =
14683 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14684 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14686 TYPE_FIELD_IGNORE_BITS (type
) =
14687 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14688 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14691 /* If the type has baseclasses, allocate and clear a bit vector for
14692 TYPE_FIELD_VIRTUAL_BITS. */
14693 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14695 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14696 unsigned char *pointer
;
14698 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14699 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14700 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14701 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14702 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14705 if (!fip
->variant_parts
.empty ())
14706 add_variant_property (fip
, type
, cu
);
14708 /* Copy the saved-up fields into the field vector. */
14709 for (int i
= 0; i
< nfields
; ++i
)
14711 struct nextfield
&field
14712 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14713 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14715 TYPE_FIELD (type
, i
) = field
.field
;
14716 switch (field
.accessibility
)
14718 case DW_ACCESS_private
:
14719 if (cu
->language
!= language_ada
)
14720 SET_TYPE_FIELD_PRIVATE (type
, i
);
14723 case DW_ACCESS_protected
:
14724 if (cu
->language
!= language_ada
)
14725 SET_TYPE_FIELD_PROTECTED (type
, i
);
14728 case DW_ACCESS_public
:
14732 /* Unknown accessibility. Complain and treat it as public. */
14734 complaint (_("unsupported accessibility %d"),
14735 field
.accessibility
);
14739 if (i
< fip
->baseclasses
.size ())
14741 switch (field
.virtuality
)
14743 case DW_VIRTUALITY_virtual
:
14744 case DW_VIRTUALITY_pure_virtual
:
14745 if (cu
->language
== language_ada
)
14746 error (_("unexpected virtuality in component of Ada type"));
14747 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14754 /* Return true if this member function is a constructor, false
14758 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14760 const char *fieldname
;
14761 const char *type_name
;
14764 if (die
->parent
== NULL
)
14767 if (die
->parent
->tag
!= DW_TAG_structure_type
14768 && die
->parent
->tag
!= DW_TAG_union_type
14769 && die
->parent
->tag
!= DW_TAG_class_type
)
14772 fieldname
= dwarf2_name (die
, cu
);
14773 type_name
= dwarf2_name (die
->parent
, cu
);
14774 if (fieldname
== NULL
|| type_name
== NULL
)
14777 len
= strlen (fieldname
);
14778 return (strncmp (fieldname
, type_name
, len
) == 0
14779 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14782 /* Check if the given VALUE is a recognized enum
14783 dwarf_defaulted_attribute constant according to DWARF5 spec,
14787 is_valid_DW_AT_defaulted (ULONGEST value
)
14791 case DW_DEFAULTED_no
:
14792 case DW_DEFAULTED_in_class
:
14793 case DW_DEFAULTED_out_of_class
:
14797 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14801 /* Add a member function to the proper fieldlist. */
14804 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14805 struct type
*type
, struct dwarf2_cu
*cu
)
14807 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14808 struct attribute
*attr
;
14810 struct fnfieldlist
*flp
= nullptr;
14811 struct fn_field
*fnp
;
14812 const char *fieldname
;
14813 struct type
*this_type
;
14814 enum dwarf_access_attribute accessibility
;
14816 if (cu
->language
== language_ada
)
14817 error (_("unexpected member function in Ada type"));
14819 /* Get name of member function. */
14820 fieldname
= dwarf2_name (die
, cu
);
14821 if (fieldname
== NULL
)
14824 /* Look up member function name in fieldlist. */
14825 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
14827 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
14829 flp
= &fip
->fnfieldlists
[i
];
14834 /* Create a new fnfieldlist if necessary. */
14835 if (flp
== nullptr)
14837 fip
->fnfieldlists
.emplace_back ();
14838 flp
= &fip
->fnfieldlists
.back ();
14839 flp
->name
= fieldname
;
14840 i
= fip
->fnfieldlists
.size () - 1;
14843 /* Create a new member function field and add it to the vector of
14845 flp
->fnfields
.emplace_back ();
14846 fnp
= &flp
->fnfields
.back ();
14848 /* Delay processing of the physname until later. */
14849 if (cu
->language
== language_cplus
)
14850 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
14854 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
14855 fnp
->physname
= physname
? physname
: "";
14858 fnp
->type
= alloc_type (objfile
);
14859 this_type
= read_type_die (die
, cu
);
14860 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
14862 int nparams
= TYPE_NFIELDS (this_type
);
14864 /* TYPE is the domain of this method, and THIS_TYPE is the type
14865 of the method itself (TYPE_CODE_METHOD). */
14866 smash_to_method_type (fnp
->type
, type
,
14867 TYPE_TARGET_TYPE (this_type
),
14868 TYPE_FIELDS (this_type
),
14869 TYPE_NFIELDS (this_type
),
14870 TYPE_VARARGS (this_type
));
14872 /* Handle static member functions.
14873 Dwarf2 has no clean way to discern C++ static and non-static
14874 member functions. G++ helps GDB by marking the first
14875 parameter for non-static member functions (which is the this
14876 pointer) as artificial. We obtain this information from
14877 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
14878 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
14879 fnp
->voffset
= VOFFSET_STATIC
;
14882 complaint (_("member function type missing for '%s'"),
14883 dwarf2_full_name (fieldname
, die
, cu
));
14885 /* Get fcontext from DW_AT_containing_type if present. */
14886 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14887 fnp
->fcontext
= die_containing_type (die
, cu
);
14889 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
14890 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
14892 /* Get accessibility. */
14893 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14894 if (attr
!= nullptr)
14895 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14897 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14898 switch (accessibility
)
14900 case DW_ACCESS_private
:
14901 fnp
->is_private
= 1;
14903 case DW_ACCESS_protected
:
14904 fnp
->is_protected
= 1;
14908 /* Check for artificial methods. */
14909 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
14910 if (attr
&& DW_UNSND (attr
) != 0)
14911 fnp
->is_artificial
= 1;
14913 /* Check for defaulted methods. */
14914 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
14915 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
14916 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
14918 /* Check for deleted methods. */
14919 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
14920 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
14921 fnp
->is_deleted
= 1;
14923 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
14925 /* Get index in virtual function table if it is a virtual member
14926 function. For older versions of GCC, this is an offset in the
14927 appropriate virtual table, as specified by DW_AT_containing_type.
14928 For everyone else, it is an expression to be evaluated relative
14929 to the object address. */
14931 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14932 if (attr
!= nullptr)
14934 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
14936 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14938 /* Old-style GCC. */
14939 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14941 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14942 || (DW_BLOCK (attr
)->size
> 1
14943 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14944 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14946 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14947 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
14948 dwarf2_complex_location_expr_complaint ();
14950 fnp
->voffset
/= cu
->header
.addr_size
;
14954 dwarf2_complex_location_expr_complaint ();
14956 if (!fnp
->fcontext
)
14958 /* If there is no `this' field and no DW_AT_containing_type,
14959 we cannot actually find a base class context for the
14961 if (TYPE_NFIELDS (this_type
) == 0
14962 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
14964 complaint (_("cannot determine context for virtual member "
14965 "function \"%s\" (offset %s)"),
14966 fieldname
, sect_offset_str (die
->sect_off
));
14971 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
14975 else if (attr
->form_is_section_offset ())
14977 dwarf2_complex_location_expr_complaint ();
14981 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
14987 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14988 if (attr
&& DW_UNSND (attr
))
14990 /* GCC does this, as of 2008-08-25; PR debug/37237. */
14991 complaint (_("Member function \"%s\" (offset %s) is virtual "
14992 "but the vtable offset is not specified"),
14993 fieldname
, sect_offset_str (die
->sect_off
));
14994 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14995 TYPE_CPLUS_DYNAMIC (type
) = 1;
15000 /* Create the vector of member function fields, and attach it to the type. */
15003 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15004 struct dwarf2_cu
*cu
)
15006 if (cu
->language
== language_ada
)
15007 error (_("unexpected member functions in Ada type"));
15009 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15010 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15012 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15014 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15016 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15017 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15019 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15020 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15021 fn_flp
->fn_fields
= (struct fn_field
*)
15022 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15024 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15025 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15028 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15031 /* Returns non-zero if NAME is the name of a vtable member in CU's
15032 language, zero otherwise. */
15034 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15036 static const char vptr
[] = "_vptr";
15038 /* Look for the C++ form of the vtable. */
15039 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15045 /* GCC outputs unnamed structures that are really pointers to member
15046 functions, with the ABI-specified layout. If TYPE describes
15047 such a structure, smash it into a member function type.
15049 GCC shouldn't do this; it should just output pointer to member DIEs.
15050 This is GCC PR debug/28767. */
15053 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15055 struct type
*pfn_type
, *self_type
, *new_type
;
15057 /* Check for a structure with no name and two children. */
15058 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15061 /* Check for __pfn and __delta members. */
15062 if (TYPE_FIELD_NAME (type
, 0) == NULL
15063 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15064 || TYPE_FIELD_NAME (type
, 1) == NULL
15065 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15068 /* Find the type of the method. */
15069 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15070 if (pfn_type
== NULL
15071 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15072 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15075 /* Look for the "this" argument. */
15076 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15077 if (TYPE_NFIELDS (pfn_type
) == 0
15078 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15079 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15082 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15083 new_type
= alloc_type (objfile
);
15084 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15085 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15086 TYPE_VARARGS (pfn_type
));
15087 smash_to_methodptr_type (type
, new_type
);
15090 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15091 appropriate error checking and issuing complaints if there is a
15095 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15097 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15099 if (attr
== nullptr)
15102 if (!attr
->form_is_constant ())
15104 complaint (_("DW_AT_alignment must have constant form"
15105 " - DIE at %s [in module %s]"),
15106 sect_offset_str (die
->sect_off
),
15107 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15112 if (attr
->form
== DW_FORM_sdata
)
15114 LONGEST val
= DW_SND (attr
);
15117 complaint (_("DW_AT_alignment value must not be negative"
15118 " - DIE at %s [in module %s]"),
15119 sect_offset_str (die
->sect_off
),
15120 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15126 align
= DW_UNSND (attr
);
15130 complaint (_("DW_AT_alignment value must not be zero"
15131 " - DIE at %s [in module %s]"),
15132 sect_offset_str (die
->sect_off
),
15133 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15136 if ((align
& (align
- 1)) != 0)
15138 complaint (_("DW_AT_alignment value must be a power of 2"
15139 " - DIE at %s [in module %s]"),
15140 sect_offset_str (die
->sect_off
),
15141 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15148 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15149 the alignment for TYPE. */
15152 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15155 if (!set_type_align (type
, get_alignment (cu
, die
)))
15156 complaint (_("DW_AT_alignment value too large"
15157 " - DIE at %s [in module %s]"),
15158 sect_offset_str (die
->sect_off
),
15159 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15162 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15163 constant for a type, according to DWARF5 spec, Table 5.5. */
15166 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15171 case DW_CC_pass_by_reference
:
15172 case DW_CC_pass_by_value
:
15176 complaint (_("unrecognized DW_AT_calling_convention value "
15177 "(%s) for a type"), pulongest (value
));
15182 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15183 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15184 also according to GNU-specific values (see include/dwarf2.h). */
15187 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15192 case DW_CC_program
:
15196 case DW_CC_GNU_renesas_sh
:
15197 case DW_CC_GNU_borland_fastcall_i386
:
15198 case DW_CC_GDB_IBM_OpenCL
:
15202 complaint (_("unrecognized DW_AT_calling_convention value "
15203 "(%s) for a subroutine"), pulongest (value
));
15208 /* Called when we find the DIE that starts a structure or union scope
15209 (definition) to create a type for the structure or union. Fill in
15210 the type's name and general properties; the members will not be
15211 processed until process_structure_scope. A symbol table entry for
15212 the type will also not be done until process_structure_scope (assuming
15213 the type has a name).
15215 NOTE: we need to call these functions regardless of whether or not the
15216 DIE has a DW_AT_name attribute, since it might be an anonymous
15217 structure or union. This gets the type entered into our set of
15218 user defined types. */
15220 static struct type
*
15221 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15223 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15225 struct attribute
*attr
;
15228 /* If the definition of this type lives in .debug_types, read that type.
15229 Don't follow DW_AT_specification though, that will take us back up
15230 the chain and we want to go down. */
15231 attr
= die
->attr (DW_AT_signature
);
15232 if (attr
!= nullptr)
15234 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15236 /* The type's CU may not be the same as CU.
15237 Ensure TYPE is recorded with CU in die_type_hash. */
15238 return set_die_type (die
, type
, cu
);
15241 type
= alloc_type (objfile
);
15242 INIT_CPLUS_SPECIFIC (type
);
15244 name
= dwarf2_name (die
, cu
);
15247 if (cu
->language
== language_cplus
15248 || cu
->language
== language_d
15249 || cu
->language
== language_rust
)
15251 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15253 /* dwarf2_full_name might have already finished building the DIE's
15254 type. If so, there is no need to continue. */
15255 if (get_die_type (die
, cu
) != NULL
)
15256 return get_die_type (die
, cu
);
15258 TYPE_NAME (type
) = full_name
;
15262 /* The name is already allocated along with this objfile, so
15263 we don't need to duplicate it for the type. */
15264 TYPE_NAME (type
) = name
;
15268 if (die
->tag
== DW_TAG_structure_type
)
15270 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15272 else if (die
->tag
== DW_TAG_union_type
)
15274 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15278 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15281 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15282 TYPE_DECLARED_CLASS (type
) = 1;
15284 /* Store the calling convention in the type if it's available in
15285 the die. Otherwise the calling convention remains set to
15286 the default value DW_CC_normal. */
15287 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15288 if (attr
!= nullptr
15289 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15291 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15292 TYPE_CPLUS_CALLING_CONVENTION (type
)
15293 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15296 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15297 if (attr
!= nullptr)
15299 if (attr
->form_is_constant ())
15300 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15303 /* For the moment, dynamic type sizes are not supported
15304 by GDB's struct type. The actual size is determined
15305 on-demand when resolving the type of a given object,
15306 so set the type's length to zero for now. Otherwise,
15307 we record an expression as the length, and that expression
15308 could lead to a very large value, which could eventually
15309 lead to us trying to allocate that much memory when creating
15310 a value of that type. */
15311 TYPE_LENGTH (type
) = 0;
15316 TYPE_LENGTH (type
) = 0;
15319 maybe_set_alignment (cu
, die
, type
);
15321 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15323 /* ICC<14 does not output the required DW_AT_declaration on
15324 incomplete types, but gives them a size of zero. */
15325 TYPE_STUB (type
) = 1;
15328 TYPE_STUB_SUPPORTED (type
) = 1;
15330 if (die_is_declaration (die
, cu
))
15331 TYPE_STUB (type
) = 1;
15332 else if (attr
== NULL
&& die
->child
== NULL
15333 && producer_is_realview (cu
->producer
))
15334 /* RealView does not output the required DW_AT_declaration
15335 on incomplete types. */
15336 TYPE_STUB (type
) = 1;
15338 /* We need to add the type field to the die immediately so we don't
15339 infinitely recurse when dealing with pointers to the structure
15340 type within the structure itself. */
15341 set_die_type (die
, type
, cu
);
15343 /* set_die_type should be already done. */
15344 set_descriptive_type (type
, die
, cu
);
15349 static void handle_struct_member_die
15350 (struct die_info
*child_die
,
15352 struct field_info
*fi
,
15353 std::vector
<struct symbol
*> *template_args
,
15354 struct dwarf2_cu
*cu
);
15356 /* A helper for handle_struct_member_die that handles
15357 DW_TAG_variant_part. */
15360 handle_variant_part (struct die_info
*die
, struct type
*type
,
15361 struct field_info
*fi
,
15362 std::vector
<struct symbol
*> *template_args
,
15363 struct dwarf2_cu
*cu
)
15365 variant_part_builder
*new_part
;
15366 if (fi
->current_variant_part
== nullptr)
15368 fi
->variant_parts
.emplace_back ();
15369 new_part
= &fi
->variant_parts
.back ();
15371 else if (!fi
->current_variant_part
->processing_variant
)
15373 complaint (_("nested DW_TAG_variant_part seen "
15374 "- DIE at %s [in module %s]"),
15375 sect_offset_str (die
->sect_off
),
15376 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15381 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15382 current
.variant_parts
.emplace_back ();
15383 new_part
= ¤t
.variant_parts
.back ();
15386 /* When we recurse, we want callees to add to this new variant
15388 scoped_restore save_current_variant_part
15389 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15391 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15394 /* It's a univariant form, an extension we support. */
15396 else if (discr
->form_is_ref ())
15398 struct dwarf2_cu
*target_cu
= cu
;
15399 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15401 new_part
->discriminant_offset
= target_die
->sect_off
;
15405 complaint (_("DW_AT_discr does not have DIE reference form"
15406 " - DIE at %s [in module %s]"),
15407 sect_offset_str (die
->sect_off
),
15408 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15411 for (die_info
*child_die
= die
->child
;
15413 child_die
= child_die
->sibling
)
15414 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15417 /* A helper for handle_struct_member_die that handles
15421 handle_variant (struct die_info
*die
, struct type
*type
,
15422 struct field_info
*fi
,
15423 std::vector
<struct symbol
*> *template_args
,
15424 struct dwarf2_cu
*cu
)
15426 if (fi
->current_variant_part
== nullptr)
15428 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15429 "- DIE at %s [in module %s]"),
15430 sect_offset_str (die
->sect_off
),
15431 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15434 if (fi
->current_variant_part
->processing_variant
)
15436 complaint (_("nested DW_TAG_variant seen "
15437 "- DIE at %s [in module %s]"),
15438 sect_offset_str (die
->sect_off
),
15439 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15443 scoped_restore save_processing_variant
15444 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15447 fi
->current_variant_part
->variants
.emplace_back ();
15448 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15449 variant
.first_field
= fi
->fields
.size ();
15451 /* In a variant we want to get the discriminant and also add a
15452 field for our sole member child. */
15453 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15454 if (discr
== nullptr)
15456 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15457 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15458 variant
.default_branch
= true;
15460 variant
.discr_list_data
= DW_BLOCK (discr
);
15463 variant
.discriminant_value
= DW_UNSND (discr
);
15465 for (die_info
*variant_child
= die
->child
;
15466 variant_child
!= NULL
;
15467 variant_child
= variant_child
->sibling
)
15468 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15470 variant
.last_field
= fi
->fields
.size ();
15473 /* A helper for process_structure_scope that handles a single member
15477 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15478 struct field_info
*fi
,
15479 std::vector
<struct symbol
*> *template_args
,
15480 struct dwarf2_cu
*cu
)
15482 if (child_die
->tag
== DW_TAG_member
15483 || child_die
->tag
== DW_TAG_variable
)
15485 /* NOTE: carlton/2002-11-05: A C++ static data member
15486 should be a DW_TAG_member that is a declaration, but
15487 all versions of G++ as of this writing (so through at
15488 least 3.2.1) incorrectly generate DW_TAG_variable
15489 tags for them instead. */
15490 dwarf2_add_field (fi
, child_die
, cu
);
15492 else if (child_die
->tag
== DW_TAG_subprogram
)
15494 /* Rust doesn't have member functions in the C++ sense.
15495 However, it does emit ordinary functions as children
15496 of a struct DIE. */
15497 if (cu
->language
== language_rust
)
15498 read_func_scope (child_die
, cu
);
15501 /* C++ member function. */
15502 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15505 else if (child_die
->tag
== DW_TAG_inheritance
)
15507 /* C++ base class field. */
15508 dwarf2_add_field (fi
, child_die
, cu
);
15510 else if (type_can_define_types (child_die
))
15511 dwarf2_add_type_defn (fi
, child_die
, cu
);
15512 else if (child_die
->tag
== DW_TAG_template_type_param
15513 || child_die
->tag
== DW_TAG_template_value_param
)
15515 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15518 template_args
->push_back (arg
);
15520 else if (child_die
->tag
== DW_TAG_variant_part
)
15521 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15522 else if (child_die
->tag
== DW_TAG_variant
)
15523 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15526 /* Finish creating a structure or union type, including filling in
15527 its members and creating a symbol for it. */
15530 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15532 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15533 struct die_info
*child_die
;
15536 type
= get_die_type (die
, cu
);
15538 type
= read_structure_type (die
, cu
);
15540 bool has_template_parameters
= false;
15541 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15543 struct field_info fi
;
15544 std::vector
<struct symbol
*> template_args
;
15546 child_die
= die
->child
;
15548 while (child_die
&& child_die
->tag
)
15550 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15551 child_die
= child_die
->sibling
;
15554 /* Attach template arguments to type. */
15555 if (!template_args
.empty ())
15557 has_template_parameters
= true;
15558 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15559 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15560 TYPE_TEMPLATE_ARGUMENTS (type
)
15561 = XOBNEWVEC (&objfile
->objfile_obstack
,
15563 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15564 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15565 template_args
.data (),
15566 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15567 * sizeof (struct symbol
*)));
15570 /* Attach fields and member functions to the type. */
15571 if (fi
.nfields () > 0)
15572 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15573 if (!fi
.fnfieldlists
.empty ())
15575 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15577 /* Get the type which refers to the base class (possibly this
15578 class itself) which contains the vtable pointer for the current
15579 class from the DW_AT_containing_type attribute. This use of
15580 DW_AT_containing_type is a GNU extension. */
15582 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15584 struct type
*t
= die_containing_type (die
, cu
);
15586 set_type_vptr_basetype (type
, t
);
15591 /* Our own class provides vtbl ptr. */
15592 for (i
= TYPE_NFIELDS (t
) - 1;
15593 i
>= TYPE_N_BASECLASSES (t
);
15596 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15598 if (is_vtable_name (fieldname
, cu
))
15600 set_type_vptr_fieldno (type
, i
);
15605 /* Complain if virtual function table field not found. */
15606 if (i
< TYPE_N_BASECLASSES (t
))
15607 complaint (_("virtual function table pointer "
15608 "not found when defining class '%s'"),
15609 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15613 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15616 else if (cu
->producer
15617 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15619 /* The IBM XLC compiler does not provide direct indication
15620 of the containing type, but the vtable pointer is
15621 always named __vfp. */
15625 for (i
= TYPE_NFIELDS (type
) - 1;
15626 i
>= TYPE_N_BASECLASSES (type
);
15629 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15631 set_type_vptr_fieldno (type
, i
);
15632 set_type_vptr_basetype (type
, type
);
15639 /* Copy fi.typedef_field_list linked list elements content into the
15640 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15641 if (!fi
.typedef_field_list
.empty ())
15643 int count
= fi
.typedef_field_list
.size ();
15645 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15646 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15647 = ((struct decl_field
*)
15649 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15650 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15652 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15653 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15656 /* Copy fi.nested_types_list linked list elements content into the
15657 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15658 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15660 int count
= fi
.nested_types_list
.size ();
15662 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15663 TYPE_NESTED_TYPES_ARRAY (type
)
15664 = ((struct decl_field
*)
15665 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15666 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15668 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15669 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15673 quirk_gcc_member_function_pointer (type
, objfile
);
15674 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15675 cu
->rust_unions
.push_back (type
);
15677 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15678 snapshots) has been known to create a die giving a declaration
15679 for a class that has, as a child, a die giving a definition for a
15680 nested class. So we have to process our children even if the
15681 current die is a declaration. Normally, of course, a declaration
15682 won't have any children at all. */
15684 child_die
= die
->child
;
15686 while (child_die
!= NULL
&& child_die
->tag
)
15688 if (child_die
->tag
== DW_TAG_member
15689 || child_die
->tag
== DW_TAG_variable
15690 || child_die
->tag
== DW_TAG_inheritance
15691 || child_die
->tag
== DW_TAG_template_value_param
15692 || child_die
->tag
== DW_TAG_template_type_param
)
15697 process_die (child_die
, cu
);
15699 child_die
= child_die
->sibling
;
15702 /* Do not consider external references. According to the DWARF standard,
15703 these DIEs are identified by the fact that they have no byte_size
15704 attribute, and a declaration attribute. */
15705 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15706 || !die_is_declaration (die
, cu
))
15708 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15710 if (has_template_parameters
)
15712 struct symtab
*symtab
;
15713 if (sym
!= nullptr)
15714 symtab
= symbol_symtab (sym
);
15715 else if (cu
->line_header
!= nullptr)
15717 /* Any related symtab will do. */
15719 = cu
->line_header
->file_names ()[0].symtab
;
15724 complaint (_("could not find suitable "
15725 "symtab for template parameter"
15726 " - DIE at %s [in module %s]"),
15727 sect_offset_str (die
->sect_off
),
15728 objfile_name (objfile
));
15731 if (symtab
!= nullptr)
15733 /* Make sure that the symtab is set on the new symbols.
15734 Even though they don't appear in this symtab directly,
15735 other parts of gdb assume that symbols do, and this is
15736 reasonably true. */
15737 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15738 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15744 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
15745 update TYPE using some information only available in DIE's children. */
15748 update_enumeration_type_from_children (struct die_info
*die
,
15750 struct dwarf2_cu
*cu
)
15752 struct die_info
*child_die
;
15753 int unsigned_enum
= 1;
15756 auto_obstack obstack
;
15758 for (child_die
= die
->child
;
15759 child_die
!= NULL
&& child_die
->tag
;
15760 child_die
= child_die
->sibling
)
15762 struct attribute
*attr
;
15764 const gdb_byte
*bytes
;
15765 struct dwarf2_locexpr_baton
*baton
;
15768 if (child_die
->tag
!= DW_TAG_enumerator
)
15771 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15775 name
= dwarf2_name (child_die
, cu
);
15777 name
= "<anonymous enumerator>";
15779 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15780 &value
, &bytes
, &baton
);
15788 if (count_one_bits_ll (value
) >= 2)
15792 /* If we already know that the enum type is neither unsigned, nor
15793 a flag type, no need to look at the rest of the enumerates. */
15794 if (!unsigned_enum
&& !flag_enum
)
15799 TYPE_UNSIGNED (type
) = 1;
15801 TYPE_FLAG_ENUM (type
) = 1;
15804 /* Given a DW_AT_enumeration_type die, set its type. We do not
15805 complete the type's fields yet, or create any symbols. */
15807 static struct type
*
15808 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15810 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15812 struct attribute
*attr
;
15815 /* If the definition of this type lives in .debug_types, read that type.
15816 Don't follow DW_AT_specification though, that will take us back up
15817 the chain and we want to go down. */
15818 attr
= die
->attr (DW_AT_signature
);
15819 if (attr
!= nullptr)
15821 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15823 /* The type's CU may not be the same as CU.
15824 Ensure TYPE is recorded with CU in die_type_hash. */
15825 return set_die_type (die
, type
, cu
);
15828 type
= alloc_type (objfile
);
15830 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
15831 name
= dwarf2_full_name (NULL
, die
, cu
);
15833 TYPE_NAME (type
) = name
;
15835 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15838 struct type
*underlying_type
= die_type (die
, cu
);
15840 TYPE_TARGET_TYPE (type
) = underlying_type
;
15843 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15844 if (attr
!= nullptr)
15846 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15850 TYPE_LENGTH (type
) = 0;
15853 maybe_set_alignment (cu
, die
, type
);
15855 /* The enumeration DIE can be incomplete. In Ada, any type can be
15856 declared as private in the package spec, and then defined only
15857 inside the package body. Such types are known as Taft Amendment
15858 Types. When another package uses such a type, an incomplete DIE
15859 may be generated by the compiler. */
15860 if (die_is_declaration (die
, cu
))
15861 TYPE_STUB (type
) = 1;
15863 /* Finish the creation of this type by using the enum's children.
15864 We must call this even when the underlying type has been provided
15865 so that we can determine if we're looking at a "flag" enum. */
15866 update_enumeration_type_from_children (die
, type
, cu
);
15868 /* If this type has an underlying type that is not a stub, then we
15869 may use its attributes. We always use the "unsigned" attribute
15870 in this situation, because ordinarily we guess whether the type
15871 is unsigned -- but the guess can be wrong and the underlying type
15872 can tell us the reality. However, we defer to a local size
15873 attribute if one exists, because this lets the compiler override
15874 the underlying type if needed. */
15875 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
15877 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
15878 underlying_type
= check_typedef (underlying_type
);
15879 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
15880 if (TYPE_LENGTH (type
) == 0)
15881 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
15882 if (TYPE_RAW_ALIGN (type
) == 0
15883 && TYPE_RAW_ALIGN (underlying_type
) != 0)
15884 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
15887 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
15889 return set_die_type (die
, type
, cu
);
15892 /* Given a pointer to a die which begins an enumeration, process all
15893 the dies that define the members of the enumeration, and create the
15894 symbol for the enumeration type.
15896 NOTE: We reverse the order of the element list. */
15899 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15901 struct type
*this_type
;
15903 this_type
= get_die_type (die
, cu
);
15904 if (this_type
== NULL
)
15905 this_type
= read_enumeration_type (die
, cu
);
15907 if (die
->child
!= NULL
)
15909 struct die_info
*child_die
;
15910 struct symbol
*sym
;
15911 std::vector
<struct field
> fields
;
15914 child_die
= die
->child
;
15915 while (child_die
&& child_die
->tag
)
15917 if (child_die
->tag
!= DW_TAG_enumerator
)
15919 process_die (child_die
, cu
);
15923 name
= dwarf2_name (child_die
, cu
);
15926 sym
= new_symbol (child_die
, this_type
, cu
);
15928 fields
.emplace_back ();
15929 struct field
&field
= fields
.back ();
15931 FIELD_NAME (field
) = sym
->linkage_name ();
15932 FIELD_TYPE (field
) = NULL
;
15933 SET_FIELD_ENUMVAL (field
, SYMBOL_VALUE (sym
));
15934 FIELD_BITSIZE (field
) = 0;
15938 child_die
= child_die
->sibling
;
15941 if (!fields
.empty ())
15943 TYPE_NFIELDS (this_type
) = fields
.size ();
15944 TYPE_FIELDS (this_type
) = (struct field
*)
15945 TYPE_ALLOC (this_type
, sizeof (struct field
) * fields
.size ());
15946 memcpy (TYPE_FIELDS (this_type
), fields
.data (),
15947 sizeof (struct field
) * fields
.size ());
15951 /* If we are reading an enum from a .debug_types unit, and the enum
15952 is a declaration, and the enum is not the signatured type in the
15953 unit, then we do not want to add a symbol for it. Adding a
15954 symbol would in some cases obscure the true definition of the
15955 enum, giving users an incomplete type when the definition is
15956 actually available. Note that we do not want to do this for all
15957 enums which are just declarations, because C++0x allows forward
15958 enum declarations. */
15959 if (cu
->per_cu
->is_debug_types
15960 && die_is_declaration (die
, cu
))
15962 struct signatured_type
*sig_type
;
15964 sig_type
= (struct signatured_type
*) cu
->per_cu
;
15965 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
15966 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
15970 new_symbol (die
, this_type
, cu
);
15973 /* Extract all information from a DW_TAG_array_type DIE and put it in
15974 the DIE's type field. For now, this only handles one dimensional
15977 static struct type
*
15978 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15980 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15981 struct die_info
*child_die
;
15983 struct type
*element_type
, *range_type
, *index_type
;
15984 struct attribute
*attr
;
15986 struct dynamic_prop
*byte_stride_prop
= NULL
;
15987 unsigned int bit_stride
= 0;
15989 element_type
= die_type (die
, cu
);
15991 /* The die_type call above may have already set the type for this DIE. */
15992 type
= get_die_type (die
, cu
);
15996 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16000 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16003 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16004 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16008 complaint (_("unable to read array DW_AT_byte_stride "
16009 " - DIE at %s [in module %s]"),
16010 sect_offset_str (die
->sect_off
),
16011 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16012 /* Ignore this attribute. We will likely not be able to print
16013 arrays of this type correctly, but there is little we can do
16014 to help if we cannot read the attribute's value. */
16015 byte_stride_prop
= NULL
;
16019 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16021 bit_stride
= DW_UNSND (attr
);
16023 /* Irix 6.2 native cc creates array types without children for
16024 arrays with unspecified length. */
16025 if (die
->child
== NULL
)
16027 index_type
= objfile_type (objfile
)->builtin_int
;
16028 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16029 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16030 byte_stride_prop
, bit_stride
);
16031 return set_die_type (die
, type
, cu
);
16034 std::vector
<struct type
*> range_types
;
16035 child_die
= die
->child
;
16036 while (child_die
&& child_die
->tag
)
16038 if (child_die
->tag
== DW_TAG_subrange_type
)
16040 struct type
*child_type
= read_type_die (child_die
, cu
);
16042 if (child_type
!= NULL
)
16044 /* The range type was succesfully read. Save it for the
16045 array type creation. */
16046 range_types
.push_back (child_type
);
16049 child_die
= child_die
->sibling
;
16052 /* Dwarf2 dimensions are output from left to right, create the
16053 necessary array types in backwards order. */
16055 type
= element_type
;
16057 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16061 while (i
< range_types
.size ())
16062 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16063 byte_stride_prop
, bit_stride
);
16067 size_t ndim
= range_types
.size ();
16069 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16070 byte_stride_prop
, bit_stride
);
16073 /* Understand Dwarf2 support for vector types (like they occur on
16074 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16075 array type. This is not part of the Dwarf2/3 standard yet, but a
16076 custom vendor extension. The main difference between a regular
16077 array and the vector variant is that vectors are passed by value
16079 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16080 if (attr
!= nullptr)
16081 make_vector_type (type
);
16083 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16084 implementation may choose to implement triple vectors using this
16086 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16087 if (attr
!= nullptr)
16089 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16090 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16092 complaint (_("DW_AT_byte_size for array type smaller "
16093 "than the total size of elements"));
16096 name
= dwarf2_name (die
, cu
);
16098 TYPE_NAME (type
) = name
;
16100 maybe_set_alignment (cu
, die
, type
);
16102 /* Install the type in the die. */
16103 set_die_type (die
, type
, cu
);
16105 /* set_die_type should be already done. */
16106 set_descriptive_type (type
, die
, cu
);
16111 static enum dwarf_array_dim_ordering
16112 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16114 struct attribute
*attr
;
16116 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16118 if (attr
!= nullptr)
16119 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16121 /* GNU F77 is a special case, as at 08/2004 array type info is the
16122 opposite order to the dwarf2 specification, but data is still
16123 laid out as per normal fortran.
16125 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16126 version checking. */
16128 if (cu
->language
== language_fortran
16129 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16131 return DW_ORD_row_major
;
16134 switch (cu
->language_defn
->la_array_ordering
)
16136 case array_column_major
:
16137 return DW_ORD_col_major
;
16138 case array_row_major
:
16140 return DW_ORD_row_major
;
16144 /* Extract all information from a DW_TAG_set_type DIE and put it in
16145 the DIE's type field. */
16147 static struct type
*
16148 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16150 struct type
*domain_type
, *set_type
;
16151 struct attribute
*attr
;
16153 domain_type
= die_type (die
, cu
);
16155 /* The die_type call above may have already set the type for this DIE. */
16156 set_type
= get_die_type (die
, cu
);
16160 set_type
= create_set_type (NULL
, domain_type
);
16162 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16163 if (attr
!= nullptr)
16164 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16166 maybe_set_alignment (cu
, die
, set_type
);
16168 return set_die_type (die
, set_type
, cu
);
16171 /* A helper for read_common_block that creates a locexpr baton.
16172 SYM is the symbol which we are marking as computed.
16173 COMMON_DIE is the DIE for the common block.
16174 COMMON_LOC is the location expression attribute for the common
16176 MEMBER_LOC is the location expression attribute for the particular
16177 member of the common block that we are processing.
16178 CU is the CU from which the above come. */
16181 mark_common_block_symbol_computed (struct symbol
*sym
,
16182 struct die_info
*common_die
,
16183 struct attribute
*common_loc
,
16184 struct attribute
*member_loc
,
16185 struct dwarf2_cu
*cu
)
16187 struct dwarf2_per_objfile
*dwarf2_per_objfile
16188 = cu
->per_cu
->dwarf2_per_objfile
;
16189 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16190 struct dwarf2_locexpr_baton
*baton
;
16192 unsigned int cu_off
;
16193 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16194 LONGEST offset
= 0;
16196 gdb_assert (common_loc
&& member_loc
);
16197 gdb_assert (common_loc
->form_is_block ());
16198 gdb_assert (member_loc
->form_is_block ()
16199 || member_loc
->form_is_constant ());
16201 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16202 baton
->per_cu
= cu
->per_cu
;
16203 gdb_assert (baton
->per_cu
);
16205 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16207 if (member_loc
->form_is_constant ())
16209 offset
= member_loc
->constant_value (0);
16210 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16213 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16215 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16218 *ptr
++ = DW_OP_call4
;
16219 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16220 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16223 if (member_loc
->form_is_constant ())
16225 *ptr
++ = DW_OP_addr
;
16226 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16227 ptr
+= cu
->header
.addr_size
;
16231 /* We have to copy the data here, because DW_OP_call4 will only
16232 use a DW_AT_location attribute. */
16233 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16234 ptr
+= DW_BLOCK (member_loc
)->size
;
16237 *ptr
++ = DW_OP_plus
;
16238 gdb_assert (ptr
- baton
->data
== baton
->size
);
16240 SYMBOL_LOCATION_BATON (sym
) = baton
;
16241 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16244 /* Create appropriate locally-scoped variables for all the
16245 DW_TAG_common_block entries. Also create a struct common_block
16246 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16247 is used to separate the common blocks name namespace from regular
16251 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16253 struct attribute
*attr
;
16255 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16256 if (attr
!= nullptr)
16258 /* Support the .debug_loc offsets. */
16259 if (attr
->form_is_block ())
16263 else if (attr
->form_is_section_offset ())
16265 dwarf2_complex_location_expr_complaint ();
16270 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16271 "common block member");
16276 if (die
->child
!= NULL
)
16278 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16279 struct die_info
*child_die
;
16280 size_t n_entries
= 0, size
;
16281 struct common_block
*common_block
;
16282 struct symbol
*sym
;
16284 for (child_die
= die
->child
;
16285 child_die
&& child_die
->tag
;
16286 child_die
= child_die
->sibling
)
16289 size
= (sizeof (struct common_block
)
16290 + (n_entries
- 1) * sizeof (struct symbol
*));
16292 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16294 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16295 common_block
->n_entries
= 0;
16297 for (child_die
= die
->child
;
16298 child_die
&& child_die
->tag
;
16299 child_die
= child_die
->sibling
)
16301 /* Create the symbol in the DW_TAG_common_block block in the current
16303 sym
= new_symbol (child_die
, NULL
, cu
);
16306 struct attribute
*member_loc
;
16308 common_block
->contents
[common_block
->n_entries
++] = sym
;
16310 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16314 /* GDB has handled this for a long time, but it is
16315 not specified by DWARF. It seems to have been
16316 emitted by gfortran at least as recently as:
16317 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16318 complaint (_("Variable in common block has "
16319 "DW_AT_data_member_location "
16320 "- DIE at %s [in module %s]"),
16321 sect_offset_str (child_die
->sect_off
),
16322 objfile_name (objfile
));
16324 if (member_loc
->form_is_section_offset ())
16325 dwarf2_complex_location_expr_complaint ();
16326 else if (member_loc
->form_is_constant ()
16327 || member_loc
->form_is_block ())
16329 if (attr
!= nullptr)
16330 mark_common_block_symbol_computed (sym
, die
, attr
,
16334 dwarf2_complex_location_expr_complaint ();
16339 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16340 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16344 /* Create a type for a C++ namespace. */
16346 static struct type
*
16347 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16349 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16350 const char *previous_prefix
, *name
;
16354 /* For extensions, reuse the type of the original namespace. */
16355 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16357 struct die_info
*ext_die
;
16358 struct dwarf2_cu
*ext_cu
= cu
;
16360 ext_die
= dwarf2_extension (die
, &ext_cu
);
16361 type
= read_type_die (ext_die
, ext_cu
);
16363 /* EXT_CU may not be the same as CU.
16364 Ensure TYPE is recorded with CU in die_type_hash. */
16365 return set_die_type (die
, type
, cu
);
16368 name
= namespace_name (die
, &is_anonymous
, cu
);
16370 /* Now build the name of the current namespace. */
16372 previous_prefix
= determine_prefix (die
, cu
);
16373 if (previous_prefix
[0] != '\0')
16374 name
= typename_concat (&objfile
->objfile_obstack
,
16375 previous_prefix
, name
, 0, cu
);
16377 /* Create the type. */
16378 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16380 return set_die_type (die
, type
, cu
);
16383 /* Read a namespace scope. */
16386 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16388 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16391 /* Add a symbol associated to this if we haven't seen the namespace
16392 before. Also, add a using directive if it's an anonymous
16395 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16399 type
= read_type_die (die
, cu
);
16400 new_symbol (die
, type
, cu
);
16402 namespace_name (die
, &is_anonymous
, cu
);
16405 const char *previous_prefix
= determine_prefix (die
, cu
);
16407 std::vector
<const char *> excludes
;
16408 add_using_directive (using_directives (cu
),
16409 previous_prefix
, TYPE_NAME (type
), NULL
,
16410 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16414 if (die
->child
!= NULL
)
16416 struct die_info
*child_die
= die
->child
;
16418 while (child_die
&& child_die
->tag
)
16420 process_die (child_die
, cu
);
16421 child_die
= child_die
->sibling
;
16426 /* Read a Fortran module as type. This DIE can be only a declaration used for
16427 imported module. Still we need that type as local Fortran "use ... only"
16428 declaration imports depend on the created type in determine_prefix. */
16430 static struct type
*
16431 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16433 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16434 const char *module_name
;
16437 module_name
= dwarf2_name (die
, cu
);
16438 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16440 return set_die_type (die
, type
, cu
);
16443 /* Read a Fortran module. */
16446 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16448 struct die_info
*child_die
= die
->child
;
16451 type
= read_type_die (die
, cu
);
16452 new_symbol (die
, type
, cu
);
16454 while (child_die
&& child_die
->tag
)
16456 process_die (child_die
, cu
);
16457 child_die
= child_die
->sibling
;
16461 /* Return the name of the namespace represented by DIE. Set
16462 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16465 static const char *
16466 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16468 struct die_info
*current_die
;
16469 const char *name
= NULL
;
16471 /* Loop through the extensions until we find a name. */
16473 for (current_die
= die
;
16474 current_die
!= NULL
;
16475 current_die
= dwarf2_extension (die
, &cu
))
16477 /* We don't use dwarf2_name here so that we can detect the absence
16478 of a name -> anonymous namespace. */
16479 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16485 /* Is it an anonymous namespace? */
16487 *is_anonymous
= (name
== NULL
);
16489 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16494 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16495 the user defined type vector. */
16497 static struct type
*
16498 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16500 struct gdbarch
*gdbarch
16501 = cu
->per_cu
->dwarf2_per_objfile
->objfile
->arch ();
16502 struct comp_unit_head
*cu_header
= &cu
->header
;
16504 struct attribute
*attr_byte_size
;
16505 struct attribute
*attr_address_class
;
16506 int byte_size
, addr_class
;
16507 struct type
*target_type
;
16509 target_type
= die_type (die
, cu
);
16511 /* The die_type call above may have already set the type for this DIE. */
16512 type
= get_die_type (die
, cu
);
16516 type
= lookup_pointer_type (target_type
);
16518 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16519 if (attr_byte_size
)
16520 byte_size
= DW_UNSND (attr_byte_size
);
16522 byte_size
= cu_header
->addr_size
;
16524 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16525 if (attr_address_class
)
16526 addr_class
= DW_UNSND (attr_address_class
);
16528 addr_class
= DW_ADDR_none
;
16530 ULONGEST alignment
= get_alignment (cu
, die
);
16532 /* If the pointer size, alignment, or address class is different
16533 than the default, create a type variant marked as such and set
16534 the length accordingly. */
16535 if (TYPE_LENGTH (type
) != byte_size
16536 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16537 && alignment
!= TYPE_RAW_ALIGN (type
))
16538 || addr_class
!= DW_ADDR_none
)
16540 if (gdbarch_address_class_type_flags_p (gdbarch
))
16544 type_flags
= gdbarch_address_class_type_flags
16545 (gdbarch
, byte_size
, addr_class
);
16546 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16548 type
= make_type_with_address_space (type
, type_flags
);
16550 else if (TYPE_LENGTH (type
) != byte_size
)
16552 complaint (_("invalid pointer size %d"), byte_size
);
16554 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16556 complaint (_("Invalid DW_AT_alignment"
16557 " - DIE at %s [in module %s]"),
16558 sect_offset_str (die
->sect_off
),
16559 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16563 /* Should we also complain about unhandled address classes? */
16567 TYPE_LENGTH (type
) = byte_size
;
16568 set_type_align (type
, alignment
);
16569 return set_die_type (die
, type
, cu
);
16572 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16573 the user defined type vector. */
16575 static struct type
*
16576 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16579 struct type
*to_type
;
16580 struct type
*domain
;
16582 to_type
= die_type (die
, cu
);
16583 domain
= die_containing_type (die
, cu
);
16585 /* The calls above may have already set the type for this DIE. */
16586 type
= get_die_type (die
, cu
);
16590 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16591 type
= lookup_methodptr_type (to_type
);
16592 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16594 struct type
*new_type
16595 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16597 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16598 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16599 TYPE_VARARGS (to_type
));
16600 type
= lookup_methodptr_type (new_type
);
16603 type
= lookup_memberptr_type (to_type
, domain
);
16605 return set_die_type (die
, type
, cu
);
16608 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16609 the user defined type vector. */
16611 static struct type
*
16612 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16613 enum type_code refcode
)
16615 struct comp_unit_head
*cu_header
= &cu
->header
;
16616 struct type
*type
, *target_type
;
16617 struct attribute
*attr
;
16619 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16621 target_type
= die_type (die
, cu
);
16623 /* The die_type call above may have already set the type for this DIE. */
16624 type
= get_die_type (die
, cu
);
16628 type
= lookup_reference_type (target_type
, refcode
);
16629 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16630 if (attr
!= nullptr)
16632 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16636 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16638 maybe_set_alignment (cu
, die
, type
);
16639 return set_die_type (die
, type
, cu
);
16642 /* Add the given cv-qualifiers to the element type of the array. GCC
16643 outputs DWARF type qualifiers that apply to an array, not the
16644 element type. But GDB relies on the array element type to carry
16645 the cv-qualifiers. This mimics section 6.7.3 of the C99
16648 static struct type
*
16649 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16650 struct type
*base_type
, int cnst
, int voltl
)
16652 struct type
*el_type
, *inner_array
;
16654 base_type
= copy_type (base_type
);
16655 inner_array
= base_type
;
16657 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16659 TYPE_TARGET_TYPE (inner_array
) =
16660 copy_type (TYPE_TARGET_TYPE (inner_array
));
16661 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16664 el_type
= TYPE_TARGET_TYPE (inner_array
);
16665 cnst
|= TYPE_CONST (el_type
);
16666 voltl
|= TYPE_VOLATILE (el_type
);
16667 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16669 return set_die_type (die
, base_type
, cu
);
16672 static struct type
*
16673 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16675 struct type
*base_type
, *cv_type
;
16677 base_type
= die_type (die
, cu
);
16679 /* The die_type call above may have already set the type for this DIE. */
16680 cv_type
= get_die_type (die
, cu
);
16684 /* In case the const qualifier is applied to an array type, the element type
16685 is so qualified, not the array type (section 6.7.3 of C99). */
16686 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16687 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16689 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16690 return set_die_type (die
, cv_type
, cu
);
16693 static struct type
*
16694 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16696 struct type
*base_type
, *cv_type
;
16698 base_type
= die_type (die
, cu
);
16700 /* The die_type call above may have already set the type for this DIE. */
16701 cv_type
= get_die_type (die
, cu
);
16705 /* In case the volatile qualifier is applied to an array type, the
16706 element type is so qualified, not the array type (section 6.7.3
16708 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16709 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16711 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16712 return set_die_type (die
, cv_type
, cu
);
16715 /* Handle DW_TAG_restrict_type. */
16717 static struct type
*
16718 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16720 struct type
*base_type
, *cv_type
;
16722 base_type
= die_type (die
, cu
);
16724 /* The die_type call above may have already set the type for this DIE. */
16725 cv_type
= get_die_type (die
, cu
);
16729 cv_type
= make_restrict_type (base_type
);
16730 return set_die_type (die
, cv_type
, cu
);
16733 /* Handle DW_TAG_atomic_type. */
16735 static struct type
*
16736 read_tag_atomic_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 cv_type
= make_atomic_type (base_type
);
16748 return set_die_type (die
, cv_type
, cu
);
16751 /* Extract all information from a DW_TAG_string_type DIE and add to
16752 the user defined type vector. It isn't really a user defined type,
16753 but it behaves like one, with other DIE's using an AT_user_def_type
16754 attribute to reference it. */
16756 static struct type
*
16757 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16759 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16760 struct gdbarch
*gdbarch
= objfile
->arch ();
16761 struct type
*type
, *range_type
, *index_type
, *char_type
;
16762 struct attribute
*attr
;
16763 struct dynamic_prop prop
;
16764 bool length_is_constant
= true;
16767 /* There are a couple of places where bit sizes might be made use of
16768 when parsing a DW_TAG_string_type, however, no producer that we know
16769 of make use of these. Handling bit sizes that are a multiple of the
16770 byte size is easy enough, but what about other bit sizes? Lets deal
16771 with that problem when we have to. Warn about these attributes being
16772 unsupported, then parse the type and ignore them like we always
16774 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16775 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16777 static bool warning_printed
= false;
16778 if (!warning_printed
)
16780 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16781 "currently supported on DW_TAG_string_type."));
16782 warning_printed
= true;
16786 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16787 if (attr
!= nullptr && !attr
->form_is_constant ())
16789 /* The string length describes the location at which the length of
16790 the string can be found. The size of the length field can be
16791 specified with one of the attributes below. */
16792 struct type
*prop_type
;
16793 struct attribute
*len
16794 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16795 if (len
== nullptr)
16796 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16797 if (len
!= nullptr && len
->form_is_constant ())
16799 /* Pass 0 as the default as we know this attribute is constant
16800 and the default value will not be returned. */
16801 LONGEST sz
= len
->constant_value (0);
16802 prop_type
= cu
->per_cu
->int_type (sz
, true);
16806 /* If the size is not specified then we assume it is the size of
16807 an address on this target. */
16808 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16811 /* Convert the attribute into a dynamic property. */
16812 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16815 length_is_constant
= false;
16817 else if (attr
!= nullptr)
16819 /* This DW_AT_string_length just contains the length with no
16820 indirection. There's no need to create a dynamic property in this
16821 case. Pass 0 for the default value as we know it will not be
16822 returned in this case. */
16823 length
= attr
->constant_value (0);
16825 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
16827 /* We don't currently support non-constant byte sizes for strings. */
16828 length
= attr
->constant_value (1);
16832 /* Use 1 as a fallback length if we have nothing else. */
16836 index_type
= objfile_type (objfile
)->builtin_int
;
16837 if (length_is_constant
)
16838 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
16841 struct dynamic_prop low_bound
;
16843 low_bound
.kind
= PROP_CONST
;
16844 low_bound
.data
.const_val
= 1;
16845 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
16847 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
16848 type
= create_string_type (NULL
, char_type
, range_type
);
16850 return set_die_type (die
, type
, cu
);
16853 /* Assuming that DIE corresponds to a function, returns nonzero
16854 if the function is prototyped. */
16857 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
16859 struct attribute
*attr
;
16861 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
16862 if (attr
&& (DW_UNSND (attr
) != 0))
16865 /* The DWARF standard implies that the DW_AT_prototyped attribute
16866 is only meaningful for C, but the concept also extends to other
16867 languages that allow unprototyped functions (Eg: Objective C).
16868 For all other languages, assume that functions are always
16870 if (cu
->language
!= language_c
16871 && cu
->language
!= language_objc
16872 && cu
->language
!= language_opencl
)
16875 /* RealView does not emit DW_AT_prototyped. We can not distinguish
16876 prototyped and unprototyped functions; default to prototyped,
16877 since that is more common in modern code (and RealView warns
16878 about unprototyped functions). */
16879 if (producer_is_realview (cu
->producer
))
16885 /* Handle DIES due to C code like:
16889 int (*funcp)(int a, long l);
16893 ('funcp' generates a DW_TAG_subroutine_type DIE). */
16895 static struct type
*
16896 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16898 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16899 struct type
*type
; /* Type that this function returns. */
16900 struct type
*ftype
; /* Function that returns above type. */
16901 struct attribute
*attr
;
16903 type
= die_type (die
, cu
);
16905 /* The die_type call above may have already set the type for this DIE. */
16906 ftype
= get_die_type (die
, cu
);
16910 ftype
= lookup_function_type (type
);
16912 if (prototyped_function_p (die
, cu
))
16913 TYPE_PROTOTYPED (ftype
) = 1;
16915 /* Store the calling convention in the type if it's available in
16916 the subroutine die. Otherwise set the calling convention to
16917 the default value DW_CC_normal. */
16918 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16919 if (attr
!= nullptr
16920 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
16921 TYPE_CALLING_CONVENTION (ftype
)
16922 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
16923 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
16924 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
16926 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
16928 /* Record whether the function returns normally to its caller or not
16929 if the DWARF producer set that information. */
16930 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
16931 if (attr
&& (DW_UNSND (attr
) != 0))
16932 TYPE_NO_RETURN (ftype
) = 1;
16934 /* We need to add the subroutine type to the die immediately so
16935 we don't infinitely recurse when dealing with parameters
16936 declared as the same subroutine type. */
16937 set_die_type (die
, ftype
, cu
);
16939 if (die
->child
!= NULL
)
16941 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
16942 struct die_info
*child_die
;
16943 int nparams
, iparams
;
16945 /* Count the number of parameters.
16946 FIXME: GDB currently ignores vararg functions, but knows about
16947 vararg member functions. */
16949 child_die
= die
->child
;
16950 while (child_die
&& child_die
->tag
)
16952 if (child_die
->tag
== DW_TAG_formal_parameter
)
16954 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
16955 TYPE_VARARGS (ftype
) = 1;
16956 child_die
= child_die
->sibling
;
16959 /* Allocate storage for parameters and fill them in. */
16960 TYPE_NFIELDS (ftype
) = nparams
;
16961 TYPE_FIELDS (ftype
) = (struct field
*)
16962 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
16964 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
16965 even if we error out during the parameters reading below. */
16966 for (iparams
= 0; iparams
< nparams
; iparams
++)
16967 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
16970 child_die
= die
->child
;
16971 while (child_die
&& child_die
->tag
)
16973 if (child_die
->tag
== DW_TAG_formal_parameter
)
16975 struct type
*arg_type
;
16977 /* DWARF version 2 has no clean way to discern C++
16978 static and non-static member functions. G++ helps
16979 GDB by marking the first parameter for non-static
16980 member functions (which is the this pointer) as
16981 artificial. We pass this information to
16982 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
16984 DWARF version 3 added DW_AT_object_pointer, which GCC
16985 4.5 does not yet generate. */
16986 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
16987 if (attr
!= nullptr)
16988 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
16990 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
16991 arg_type
= die_type (child_die
, cu
);
16993 /* RealView does not mark THIS as const, which the testsuite
16994 expects. GCC marks THIS as const in method definitions,
16995 but not in the class specifications (GCC PR 43053). */
16996 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
16997 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17000 struct dwarf2_cu
*arg_cu
= cu
;
17001 const char *name
= dwarf2_name (child_die
, cu
);
17003 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17004 if (attr
!= nullptr)
17006 /* If the compiler emits this, use it. */
17007 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17010 else if (name
&& strcmp (name
, "this") == 0)
17011 /* Function definitions will have the argument names. */
17013 else if (name
== NULL
&& iparams
== 0)
17014 /* Declarations may not have the names, so like
17015 elsewhere in GDB, assume an artificial first
17016 argument is "this". */
17020 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17024 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17027 child_die
= child_die
->sibling
;
17034 static struct type
*
17035 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17037 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17038 const char *name
= NULL
;
17039 struct type
*this_type
, *target_type
;
17041 name
= dwarf2_full_name (NULL
, die
, cu
);
17042 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17043 TYPE_TARGET_STUB (this_type
) = 1;
17044 set_die_type (die
, this_type
, cu
);
17045 target_type
= die_type (die
, cu
);
17046 if (target_type
!= this_type
)
17047 TYPE_TARGET_TYPE (this_type
) = target_type
;
17050 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17051 spec and cause infinite loops in GDB. */
17052 complaint (_("Self-referential DW_TAG_typedef "
17053 "- DIE at %s [in module %s]"),
17054 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17055 TYPE_TARGET_TYPE (this_type
) = NULL
;
17059 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17060 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17061 Handle these by just returning the target type, rather than
17062 constructing an anonymous typedef type and trying to handle this
17064 set_die_type (die
, target_type
, cu
);
17065 return target_type
;
17070 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17071 (which may be different from NAME) to the architecture back-end to allow
17072 it to guess the correct format if necessary. */
17074 static struct type
*
17075 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17076 const char *name_hint
, enum bfd_endian byte_order
)
17078 struct gdbarch
*gdbarch
= objfile
->arch ();
17079 const struct floatformat
**format
;
17082 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17084 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17086 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17091 /* Allocate an integer type of size BITS and name NAME. */
17093 static struct type
*
17094 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17095 int bits
, int unsigned_p
, const char *name
)
17099 /* Versions of Intel's C Compiler generate an integer type called "void"
17100 instead of using DW_TAG_unspecified_type. This has been seen on
17101 at least versions 14, 17, and 18. */
17102 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17103 && strcmp (name
, "void") == 0)
17104 type
= objfile_type (objfile
)->builtin_void
;
17106 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17111 /* Initialise and return a floating point type of size BITS suitable for
17112 use as a component of a complex number. The NAME_HINT is passed through
17113 when initialising the floating point type and is the name of the complex
17116 As DWARF doesn't currently provide an explicit name for the components
17117 of a complex number, but it can be helpful to have these components
17118 named, we try to select a suitable name based on the size of the
17120 static struct type
*
17121 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17122 struct objfile
*objfile
,
17123 int bits
, const char *name_hint
,
17124 enum bfd_endian byte_order
)
17126 gdbarch
*gdbarch
= objfile
->arch ();
17127 struct type
*tt
= nullptr;
17129 /* Try to find a suitable floating point builtin type of size BITS.
17130 We're going to use the name of this type as the name for the complex
17131 target type that we are about to create. */
17132 switch (cu
->language
)
17134 case language_fortran
:
17138 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17141 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17143 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17145 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17153 tt
= builtin_type (gdbarch
)->builtin_float
;
17156 tt
= builtin_type (gdbarch
)->builtin_double
;
17158 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17160 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17166 /* If the type we found doesn't match the size we were looking for, then
17167 pretend we didn't find a type at all, the complex target type we
17168 create will then be nameless. */
17169 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17172 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17173 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17176 /* Find a representation of a given base type and install
17177 it in the TYPE field of the die. */
17179 static struct type
*
17180 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17182 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17184 struct attribute
*attr
;
17185 int encoding
= 0, bits
= 0;
17189 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17190 if (attr
!= nullptr)
17191 encoding
= DW_UNSND (attr
);
17192 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17193 if (attr
!= nullptr)
17194 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17195 name
= dwarf2_name (die
, cu
);
17197 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17199 arch
= objfile
->arch ();
17200 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17202 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17205 int endianity
= DW_UNSND (attr
);
17210 byte_order
= BFD_ENDIAN_BIG
;
17212 case DW_END_little
:
17213 byte_order
= BFD_ENDIAN_LITTLE
;
17216 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17223 case DW_ATE_address
:
17224 /* Turn DW_ATE_address into a void * pointer. */
17225 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17226 type
= init_pointer_type (objfile
, bits
, name
, type
);
17228 case DW_ATE_boolean
:
17229 type
= init_boolean_type (objfile
, bits
, 1, name
);
17231 case DW_ATE_complex_float
:
17232 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17234 if (TYPE_CODE (type
) == TYPE_CODE_ERROR
)
17236 if (name
== nullptr)
17238 struct obstack
*obstack
17239 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17240 name
= obconcat (obstack
, "_Complex ", TYPE_NAME (type
),
17243 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17246 type
= init_complex_type (name
, type
);
17248 case DW_ATE_decimal_float
:
17249 type
= init_decfloat_type (objfile
, bits
, name
);
17252 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17254 case DW_ATE_signed
:
17255 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17257 case DW_ATE_unsigned
:
17258 if (cu
->language
== language_fortran
17260 && startswith (name
, "character("))
17261 type
= init_character_type (objfile
, bits
, 1, name
);
17263 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17265 case DW_ATE_signed_char
:
17266 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17267 || cu
->language
== language_pascal
17268 || cu
->language
== language_fortran
)
17269 type
= init_character_type (objfile
, bits
, 0, name
);
17271 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17273 case DW_ATE_unsigned_char
:
17274 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17275 || cu
->language
== language_pascal
17276 || cu
->language
== language_fortran
17277 || cu
->language
== language_rust
)
17278 type
= init_character_type (objfile
, bits
, 1, name
);
17280 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17285 type
= builtin_type (arch
)->builtin_char16
;
17286 else if (bits
== 32)
17287 type
= builtin_type (arch
)->builtin_char32
;
17290 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17292 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17294 return set_die_type (die
, type
, cu
);
17299 complaint (_("unsupported DW_AT_encoding: '%s'"),
17300 dwarf_type_encoding_name (encoding
));
17301 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17305 if (name
&& strcmp (name
, "char") == 0)
17306 TYPE_NOSIGN (type
) = 1;
17308 maybe_set_alignment (cu
, die
, type
);
17310 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17312 return set_die_type (die
, type
, cu
);
17315 /* Parse dwarf attribute if it's a block, reference or constant and put the
17316 resulting value of the attribute into struct bound_prop.
17317 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17320 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17321 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17322 struct type
*default_type
)
17324 struct dwarf2_property_baton
*baton
;
17325 struct obstack
*obstack
17326 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17328 gdb_assert (default_type
!= NULL
);
17330 if (attr
== NULL
|| prop
== NULL
)
17333 if (attr
->form_is_block ())
17335 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17336 baton
->property_type
= default_type
;
17337 baton
->locexpr
.per_cu
= cu
->per_cu
;
17338 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17339 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17340 switch (attr
->name
)
17342 case DW_AT_string_length
:
17343 baton
->locexpr
.is_reference
= true;
17346 baton
->locexpr
.is_reference
= false;
17349 prop
->data
.baton
= baton
;
17350 prop
->kind
= PROP_LOCEXPR
;
17351 gdb_assert (prop
->data
.baton
!= NULL
);
17353 else if (attr
->form_is_ref ())
17355 struct dwarf2_cu
*target_cu
= cu
;
17356 struct die_info
*target_die
;
17357 struct attribute
*target_attr
;
17359 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17360 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17361 if (target_attr
== NULL
)
17362 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17364 if (target_attr
== NULL
)
17367 switch (target_attr
->name
)
17369 case DW_AT_location
:
17370 if (target_attr
->form_is_section_offset ())
17372 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17373 baton
->property_type
= die_type (target_die
, target_cu
);
17374 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17375 prop
->data
.baton
= baton
;
17376 prop
->kind
= PROP_LOCLIST
;
17377 gdb_assert (prop
->data
.baton
!= NULL
);
17379 else if (target_attr
->form_is_block ())
17381 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17382 baton
->property_type
= die_type (target_die
, target_cu
);
17383 baton
->locexpr
.per_cu
= cu
->per_cu
;
17384 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17385 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17386 baton
->locexpr
.is_reference
= true;
17387 prop
->data
.baton
= baton
;
17388 prop
->kind
= PROP_LOCEXPR
;
17389 gdb_assert (prop
->data
.baton
!= NULL
);
17393 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17394 "dynamic property");
17398 case DW_AT_data_member_location
:
17402 if (!handle_data_member_location (target_die
, target_cu
,
17406 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17407 baton
->property_type
= read_type_die (target_die
->parent
,
17409 baton
->offset_info
.offset
= offset
;
17410 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17411 prop
->data
.baton
= baton
;
17412 prop
->kind
= PROP_ADDR_OFFSET
;
17417 else if (attr
->form_is_constant ())
17419 prop
->data
.const_val
= attr
->constant_value (0);
17420 prop
->kind
= PROP_CONST
;
17424 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17425 dwarf2_name (die
, cu
));
17435 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17437 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17438 struct type
*int_type
;
17440 /* Helper macro to examine the various builtin types. */
17441 #define TRY_TYPE(F) \
17442 int_type = (unsigned_p \
17443 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17444 : objfile_type (objfile)->builtin_ ## F); \
17445 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17452 TRY_TYPE (long_long
);
17456 gdb_assert_not_reached ("unable to find suitable integer type");
17462 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17464 int addr_size
= this->addr_size ();
17465 return int_type (addr_size
, unsigned_p
);
17468 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17469 present (which is valid) then compute the default type based on the
17470 compilation units address size. */
17472 static struct type
*
17473 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17475 struct type
*index_type
= die_type (die
, cu
);
17477 /* Dwarf-2 specifications explicitly allows to create subrange types
17478 without specifying a base type.
17479 In that case, the base type must be set to the type of
17480 the lower bound, upper bound or count, in that order, if any of these
17481 three attributes references an object that has a type.
17482 If no base type is found, the Dwarf-2 specifications say that
17483 a signed integer type of size equal to the size of an address should
17485 For the following C code: `extern char gdb_int [];'
17486 GCC produces an empty range DIE.
17487 FIXME: muller/2010-05-28: Possible references to object for low bound,
17488 high bound or count are not yet handled by this code. */
17489 if (TYPE_CODE (index_type
) == TYPE_CODE_VOID
)
17490 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17495 /* Read the given DW_AT_subrange DIE. */
17497 static struct type
*
17498 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17500 struct type
*base_type
, *orig_base_type
;
17501 struct type
*range_type
;
17502 struct attribute
*attr
;
17503 struct dynamic_prop low
, high
;
17504 int low_default_is_valid
;
17505 int high_bound_is_count
= 0;
17507 ULONGEST negative_mask
;
17509 orig_base_type
= read_subrange_index_type (die
, cu
);
17511 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17512 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17513 creating the range type, but we use the result of check_typedef
17514 when examining properties of the type. */
17515 base_type
= check_typedef (orig_base_type
);
17517 /* The die_type call above may have already set the type for this DIE. */
17518 range_type
= get_die_type (die
, cu
);
17522 low
.kind
= PROP_CONST
;
17523 high
.kind
= PROP_CONST
;
17524 high
.data
.const_val
= 0;
17526 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17527 omitting DW_AT_lower_bound. */
17528 switch (cu
->language
)
17531 case language_cplus
:
17532 low
.data
.const_val
= 0;
17533 low_default_is_valid
= 1;
17535 case language_fortran
:
17536 low
.data
.const_val
= 1;
17537 low_default_is_valid
= 1;
17540 case language_objc
:
17541 case language_rust
:
17542 low
.data
.const_val
= 0;
17543 low_default_is_valid
= (cu
->header
.version
>= 4);
17547 case language_pascal
:
17548 low
.data
.const_val
= 1;
17549 low_default_is_valid
= (cu
->header
.version
>= 4);
17552 low
.data
.const_val
= 0;
17553 low_default_is_valid
= 0;
17557 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17558 if (attr
!= nullptr)
17559 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17560 else if (!low_default_is_valid
)
17561 complaint (_("Missing DW_AT_lower_bound "
17562 "- DIE at %s [in module %s]"),
17563 sect_offset_str (die
->sect_off
),
17564 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17566 struct attribute
*attr_ub
, *attr_count
;
17567 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17568 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17570 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17571 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17573 /* If bounds are constant do the final calculation here. */
17574 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17575 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17577 high_bound_is_count
= 1;
17581 if (attr_ub
!= NULL
)
17582 complaint (_("Unresolved DW_AT_upper_bound "
17583 "- DIE at %s [in module %s]"),
17584 sect_offset_str (die
->sect_off
),
17585 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17586 if (attr_count
!= NULL
)
17587 complaint (_("Unresolved DW_AT_count "
17588 "- DIE at %s [in module %s]"),
17589 sect_offset_str (die
->sect_off
),
17590 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17595 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17596 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17597 bias
= bias_attr
->constant_value (0);
17599 /* Normally, the DWARF producers are expected to use a signed
17600 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17601 But this is unfortunately not always the case, as witnessed
17602 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17603 is used instead. To work around that ambiguity, we treat
17604 the bounds as signed, and thus sign-extend their values, when
17605 the base type is signed. */
17607 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17608 if (low
.kind
== PROP_CONST
17609 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17610 low
.data
.const_val
|= negative_mask
;
17611 if (high
.kind
== PROP_CONST
17612 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17613 high
.data
.const_val
|= negative_mask
;
17615 /* Check for bit and byte strides. */
17616 struct dynamic_prop byte_stride_prop
;
17617 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17618 if (attr_byte_stride
!= nullptr)
17620 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17621 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17625 struct dynamic_prop bit_stride_prop
;
17626 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17627 if (attr_bit_stride
!= nullptr)
17629 /* It only makes sense to have either a bit or byte stride. */
17630 if (attr_byte_stride
!= nullptr)
17632 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17633 "- DIE at %s [in module %s]"),
17634 sect_offset_str (die
->sect_off
),
17635 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17636 attr_bit_stride
= nullptr;
17640 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17641 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17646 if (attr_byte_stride
!= nullptr
17647 || attr_bit_stride
!= nullptr)
17649 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17650 struct dynamic_prop
*stride
17651 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17654 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17655 &high
, bias
, stride
, byte_stride_p
);
17658 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17660 if (high_bound_is_count
)
17661 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17663 /* Ada expects an empty array on no boundary attributes. */
17664 if (attr
== NULL
&& cu
->language
!= language_ada
)
17665 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17667 name
= dwarf2_name (die
, cu
);
17669 TYPE_NAME (range_type
) = name
;
17671 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17672 if (attr
!= nullptr)
17673 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17675 maybe_set_alignment (cu
, die
, range_type
);
17677 set_die_type (die
, range_type
, cu
);
17679 /* set_die_type should be already done. */
17680 set_descriptive_type (range_type
, die
, cu
);
17685 static struct type
*
17686 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17690 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17692 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17694 /* In Ada, an unspecified type is typically used when the description
17695 of the type is deferred to a different unit. When encountering
17696 such a type, we treat it as a stub, and try to resolve it later on,
17698 if (cu
->language
== language_ada
)
17699 TYPE_STUB (type
) = 1;
17701 return set_die_type (die
, type
, cu
);
17704 /* Read a single die and all its descendents. Set the die's sibling
17705 field to NULL; set other fields in the die correctly, and set all
17706 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17707 location of the info_ptr after reading all of those dies. PARENT
17708 is the parent of the die in question. */
17710 static struct die_info
*
17711 read_die_and_children (const struct die_reader_specs
*reader
,
17712 const gdb_byte
*info_ptr
,
17713 const gdb_byte
**new_info_ptr
,
17714 struct die_info
*parent
)
17716 struct die_info
*die
;
17717 const gdb_byte
*cur_ptr
;
17719 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17722 *new_info_ptr
= cur_ptr
;
17725 store_in_ref_table (die
, reader
->cu
);
17727 if (die
->has_children
)
17728 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17732 *new_info_ptr
= cur_ptr
;
17735 die
->sibling
= NULL
;
17736 die
->parent
= parent
;
17740 /* Read a die, all of its descendents, and all of its siblings; set
17741 all of the fields of all of the dies correctly. Arguments are as
17742 in read_die_and_children. */
17744 static struct die_info
*
17745 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17746 const gdb_byte
*info_ptr
,
17747 const gdb_byte
**new_info_ptr
,
17748 struct die_info
*parent
)
17750 struct die_info
*first_die
, *last_sibling
;
17751 const gdb_byte
*cur_ptr
;
17753 cur_ptr
= info_ptr
;
17754 first_die
= last_sibling
= NULL
;
17758 struct die_info
*die
17759 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17763 *new_info_ptr
= cur_ptr
;
17770 last_sibling
->sibling
= die
;
17772 last_sibling
= die
;
17776 /* Read a die, all of its descendents, and all of its siblings; set
17777 all of the fields of all of the dies correctly. Arguments are as
17778 in read_die_and_children.
17779 This the main entry point for reading a DIE and all its children. */
17781 static struct die_info
*
17782 read_die_and_siblings (const struct die_reader_specs
*reader
,
17783 const gdb_byte
*info_ptr
,
17784 const gdb_byte
**new_info_ptr
,
17785 struct die_info
*parent
)
17787 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17788 new_info_ptr
, parent
);
17790 if (dwarf_die_debug
)
17792 fprintf_unfiltered (gdb_stdlog
,
17793 "Read die from %s@0x%x of %s:\n",
17794 reader
->die_section
->get_name (),
17795 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17796 bfd_get_filename (reader
->abfd
));
17797 dump_die (die
, dwarf_die_debug
);
17803 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17805 The caller is responsible for filling in the extra attributes
17806 and updating (*DIEP)->num_attrs.
17807 Set DIEP to point to a newly allocated die with its information,
17808 except for its child, sibling, and parent fields. */
17810 static const gdb_byte
*
17811 read_full_die_1 (const struct die_reader_specs
*reader
,
17812 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17813 int num_extra_attrs
)
17815 unsigned int abbrev_number
, bytes_read
, i
;
17816 struct abbrev_info
*abbrev
;
17817 struct die_info
*die
;
17818 struct dwarf2_cu
*cu
= reader
->cu
;
17819 bfd
*abfd
= reader
->abfd
;
17821 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17822 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17823 info_ptr
+= bytes_read
;
17824 if (!abbrev_number
)
17830 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17832 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17834 bfd_get_filename (abfd
));
17836 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17837 die
->sect_off
= sect_off
;
17838 die
->tag
= abbrev
->tag
;
17839 die
->abbrev
= abbrev_number
;
17840 die
->has_children
= abbrev
->has_children
;
17842 /* Make the result usable.
17843 The caller needs to update num_attrs after adding the extra
17845 die
->num_attrs
= abbrev
->num_attrs
;
17847 std::vector
<int> indexes_that_need_reprocess
;
17848 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17850 bool need_reprocess
;
17852 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17853 info_ptr
, &need_reprocess
);
17854 if (need_reprocess
)
17855 indexes_that_need_reprocess
.push_back (i
);
17858 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
17859 if (attr
!= nullptr)
17860 cu
->str_offsets_base
= DW_UNSND (attr
);
17862 attr
= die
->attr (DW_AT_loclists_base
);
17863 if (attr
!= nullptr)
17864 cu
->loclist_base
= DW_UNSND (attr
);
17866 auto maybe_addr_base
= die
->addr_base ();
17867 if (maybe_addr_base
.has_value ())
17868 cu
->addr_base
= *maybe_addr_base
;
17869 for (int index
: indexes_that_need_reprocess
)
17870 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
17875 /* Read a die and all its attributes.
17876 Set DIEP to point to a newly allocated die with its information,
17877 except for its child, sibling, and parent fields. */
17879 static const gdb_byte
*
17880 read_full_die (const struct die_reader_specs
*reader
,
17881 struct die_info
**diep
, const gdb_byte
*info_ptr
)
17883 const gdb_byte
*result
;
17885 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
17887 if (dwarf_die_debug
)
17889 fprintf_unfiltered (gdb_stdlog
,
17890 "Read die from %s@0x%x of %s:\n",
17891 reader
->die_section
->get_name (),
17892 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17893 bfd_get_filename (reader
->abfd
));
17894 dump_die (*diep
, dwarf_die_debug
);
17901 /* Returns nonzero if TAG represents a type that we might generate a partial
17905 is_type_tag_for_partial (int tag
)
17910 /* Some types that would be reasonable to generate partial symbols for,
17911 that we don't at present. */
17912 case DW_TAG_array_type
:
17913 case DW_TAG_file_type
:
17914 case DW_TAG_ptr_to_member_type
:
17915 case DW_TAG_set_type
:
17916 case DW_TAG_string_type
:
17917 case DW_TAG_subroutine_type
:
17919 case DW_TAG_base_type
:
17920 case DW_TAG_class_type
:
17921 case DW_TAG_interface_type
:
17922 case DW_TAG_enumeration_type
:
17923 case DW_TAG_structure_type
:
17924 case DW_TAG_subrange_type
:
17925 case DW_TAG_typedef
:
17926 case DW_TAG_union_type
:
17933 /* Load all DIEs that are interesting for partial symbols into memory. */
17935 static struct partial_die_info
*
17936 load_partial_dies (const struct die_reader_specs
*reader
,
17937 const gdb_byte
*info_ptr
, int building_psymtab
)
17939 struct dwarf2_cu
*cu
= reader
->cu
;
17940 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17941 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
17942 unsigned int bytes_read
;
17943 unsigned int load_all
= 0;
17944 int nesting_level
= 1;
17949 gdb_assert (cu
->per_cu
!= NULL
);
17950 if (cu
->per_cu
->load_all_dies
)
17954 = htab_create_alloc_ex (cu
->header
.length
/ 12,
17958 &cu
->comp_unit_obstack
,
17959 hashtab_obstack_allocate
,
17960 dummy_obstack_deallocate
);
17964 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
17966 /* A NULL abbrev means the end of a series of children. */
17967 if (abbrev
== NULL
)
17969 if (--nesting_level
== 0)
17972 info_ptr
+= bytes_read
;
17973 last_die
= parent_die
;
17974 parent_die
= parent_die
->die_parent
;
17978 /* Check for template arguments. We never save these; if
17979 they're seen, we just mark the parent, and go on our way. */
17980 if (parent_die
!= NULL
17981 && cu
->language
== language_cplus
17982 && (abbrev
->tag
== DW_TAG_template_type_param
17983 || abbrev
->tag
== DW_TAG_template_value_param
))
17985 parent_die
->has_template_arguments
= 1;
17989 /* We don't need a partial DIE for the template argument. */
17990 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
17995 /* We only recurse into c++ subprograms looking for template arguments.
17996 Skip their other children. */
17998 && cu
->language
== language_cplus
17999 && parent_die
!= NULL
18000 && parent_die
->tag
== DW_TAG_subprogram
)
18002 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18006 /* Check whether this DIE is interesting enough to save. Normally
18007 we would not be interested in members here, but there may be
18008 later variables referencing them via DW_AT_specification (for
18009 static members). */
18011 && !is_type_tag_for_partial (abbrev
->tag
)
18012 && abbrev
->tag
!= DW_TAG_constant
18013 && abbrev
->tag
!= DW_TAG_enumerator
18014 && abbrev
->tag
!= DW_TAG_subprogram
18015 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18016 && abbrev
->tag
!= DW_TAG_lexical_block
18017 && abbrev
->tag
!= DW_TAG_variable
18018 && abbrev
->tag
!= DW_TAG_namespace
18019 && abbrev
->tag
!= DW_TAG_module
18020 && abbrev
->tag
!= DW_TAG_member
18021 && abbrev
->tag
!= DW_TAG_imported_unit
18022 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18024 /* Otherwise we skip to the next sibling, if any. */
18025 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18029 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18032 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18034 /* This two-pass algorithm for processing partial symbols has a
18035 high cost in cache pressure. Thus, handle some simple cases
18036 here which cover the majority of C partial symbols. DIEs
18037 which neither have specification tags in them, nor could have
18038 specification tags elsewhere pointing at them, can simply be
18039 processed and discarded.
18041 This segment is also optional; scan_partial_symbols and
18042 add_partial_symbol will handle these DIEs if we chain
18043 them in normally. When compilers which do not emit large
18044 quantities of duplicate debug information are more common,
18045 this code can probably be removed. */
18047 /* Any complete simple types at the top level (pretty much all
18048 of them, for a language without namespaces), can be processed
18050 if (parent_die
== NULL
18051 && pdi
.has_specification
== 0
18052 && pdi
.is_declaration
== 0
18053 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18054 || pdi
.tag
== DW_TAG_base_type
18055 || pdi
.tag
== DW_TAG_subrange_type
))
18057 if (building_psymtab
&& pdi
.name
!= NULL
)
18058 add_psymbol_to_list (pdi
.name
, false,
18059 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18060 psymbol_placement::STATIC
,
18061 0, cu
->language
, objfile
);
18062 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18066 /* The exception for DW_TAG_typedef with has_children above is
18067 a workaround of GCC PR debug/47510. In the case of this complaint
18068 type_name_or_error will error on such types later.
18070 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18071 it could not find the child DIEs referenced later, this is checked
18072 above. In correct DWARF DW_TAG_typedef should have no children. */
18074 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18075 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18076 "- DIE at %s [in module %s]"),
18077 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18079 /* If we're at the second level, and we're an enumerator, and
18080 our parent has no specification (meaning possibly lives in a
18081 namespace elsewhere), then we can add the partial symbol now
18082 instead of queueing it. */
18083 if (pdi
.tag
== DW_TAG_enumerator
18084 && parent_die
!= NULL
18085 && parent_die
->die_parent
== NULL
18086 && parent_die
->tag
== DW_TAG_enumeration_type
18087 && parent_die
->has_specification
== 0)
18089 if (pdi
.name
== NULL
)
18090 complaint (_("malformed enumerator DIE ignored"));
18091 else if (building_psymtab
)
18092 add_psymbol_to_list (pdi
.name
, false,
18093 VAR_DOMAIN
, LOC_CONST
, -1,
18094 cu
->language
== language_cplus
18095 ? psymbol_placement::GLOBAL
18096 : psymbol_placement::STATIC
,
18097 0, cu
->language
, objfile
);
18099 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18103 struct partial_die_info
*part_die
18104 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18106 /* We'll save this DIE so link it in. */
18107 part_die
->die_parent
= parent_die
;
18108 part_die
->die_sibling
= NULL
;
18109 part_die
->die_child
= NULL
;
18111 if (last_die
&& last_die
== parent_die
)
18112 last_die
->die_child
= part_die
;
18114 last_die
->die_sibling
= part_die
;
18116 last_die
= part_die
;
18118 if (first_die
== NULL
)
18119 first_die
= part_die
;
18121 /* Maybe add the DIE to the hash table. Not all DIEs that we
18122 find interesting need to be in the hash table, because we
18123 also have the parent/sibling/child chains; only those that we
18124 might refer to by offset later during partial symbol reading.
18126 For now this means things that might have be the target of a
18127 DW_AT_specification, DW_AT_abstract_origin, or
18128 DW_AT_extension. DW_AT_extension will refer only to
18129 namespaces; DW_AT_abstract_origin refers to functions (and
18130 many things under the function DIE, but we do not recurse
18131 into function DIEs during partial symbol reading) and
18132 possibly variables as well; DW_AT_specification refers to
18133 declarations. Declarations ought to have the DW_AT_declaration
18134 flag. It happens that GCC forgets to put it in sometimes, but
18135 only for functions, not for types.
18137 Adding more things than necessary to the hash table is harmless
18138 except for the performance cost. Adding too few will result in
18139 wasted time in find_partial_die, when we reread the compilation
18140 unit with load_all_dies set. */
18143 || abbrev
->tag
== DW_TAG_constant
18144 || abbrev
->tag
== DW_TAG_subprogram
18145 || abbrev
->tag
== DW_TAG_variable
18146 || abbrev
->tag
== DW_TAG_namespace
18147 || part_die
->is_declaration
)
18151 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18152 to_underlying (part_die
->sect_off
),
18157 /* For some DIEs we want to follow their children (if any). For C
18158 we have no reason to follow the children of structures; for other
18159 languages we have to, so that we can get at method physnames
18160 to infer fully qualified class names, for DW_AT_specification,
18161 and for C++ template arguments. For C++, we also look one level
18162 inside functions to find template arguments (if the name of the
18163 function does not already contain the template arguments).
18165 For Ada and Fortran, we need to scan the children of subprograms
18166 and lexical blocks as well because these languages allow the
18167 definition of nested entities that could be interesting for the
18168 debugger, such as nested subprograms for instance. */
18169 if (last_die
->has_children
18171 || last_die
->tag
== DW_TAG_namespace
18172 || last_die
->tag
== DW_TAG_module
18173 || last_die
->tag
== DW_TAG_enumeration_type
18174 || (cu
->language
== language_cplus
18175 && last_die
->tag
== DW_TAG_subprogram
18176 && (last_die
->name
== NULL
18177 || strchr (last_die
->name
, '<') == NULL
))
18178 || (cu
->language
!= language_c
18179 && (last_die
->tag
== DW_TAG_class_type
18180 || last_die
->tag
== DW_TAG_interface_type
18181 || last_die
->tag
== DW_TAG_structure_type
18182 || last_die
->tag
== DW_TAG_union_type
))
18183 || ((cu
->language
== language_ada
18184 || cu
->language
== language_fortran
)
18185 && (last_die
->tag
== DW_TAG_subprogram
18186 || last_die
->tag
== DW_TAG_lexical_block
))))
18189 parent_die
= last_die
;
18193 /* Otherwise we skip to the next sibling, if any. */
18194 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18196 /* Back to the top, do it again. */
18200 partial_die_info::partial_die_info (sect_offset sect_off_
,
18201 struct abbrev_info
*abbrev
)
18202 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18206 /* Read a minimal amount of information into the minimal die structure.
18207 INFO_PTR should point just after the initial uleb128 of a DIE. */
18210 partial_die_info::read (const struct die_reader_specs
*reader
,
18211 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18213 struct dwarf2_cu
*cu
= reader
->cu
;
18214 struct dwarf2_per_objfile
*dwarf2_per_objfile
18215 = cu
->per_cu
->dwarf2_per_objfile
;
18217 int has_low_pc_attr
= 0;
18218 int has_high_pc_attr
= 0;
18219 int high_pc_relative
= 0;
18221 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18224 bool need_reprocess
;
18225 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18226 info_ptr
, &need_reprocess
);
18227 /* String and address offsets that need to do the reprocessing have
18228 already been read at this point, so there is no need to wait until
18229 the loop terminates to do the reprocessing. */
18230 if (need_reprocess
)
18231 read_attribute_reprocess (reader
, &attr
);
18232 /* Store the data if it is of an attribute we want to keep in a
18233 partial symbol table. */
18239 case DW_TAG_compile_unit
:
18240 case DW_TAG_partial_unit
:
18241 case DW_TAG_type_unit
:
18242 /* Compilation units have a DW_AT_name that is a filename, not
18243 a source language identifier. */
18244 case DW_TAG_enumeration_type
:
18245 case DW_TAG_enumerator
:
18246 /* These tags always have simple identifiers already; no need
18247 to canonicalize them. */
18248 name
= DW_STRING (&attr
);
18252 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18255 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18260 case DW_AT_linkage_name
:
18261 case DW_AT_MIPS_linkage_name
:
18262 /* Note that both forms of linkage name might appear. We
18263 assume they will be the same, and we only store the last
18265 linkage_name
= DW_STRING (&attr
);
18268 has_low_pc_attr
= 1;
18269 lowpc
= attr
.value_as_address ();
18271 case DW_AT_high_pc
:
18272 has_high_pc_attr
= 1;
18273 highpc
= attr
.value_as_address ();
18274 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18275 high_pc_relative
= 1;
18277 case DW_AT_location
:
18278 /* Support the .debug_loc offsets. */
18279 if (attr
.form_is_block ())
18281 d
.locdesc
= DW_BLOCK (&attr
);
18283 else if (attr
.form_is_section_offset ())
18285 dwarf2_complex_location_expr_complaint ();
18289 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18290 "partial symbol information");
18293 case DW_AT_external
:
18294 is_external
= DW_UNSND (&attr
);
18296 case DW_AT_declaration
:
18297 is_declaration
= DW_UNSND (&attr
);
18302 case DW_AT_abstract_origin
:
18303 case DW_AT_specification
:
18304 case DW_AT_extension
:
18305 has_specification
= 1;
18306 spec_offset
= attr
.get_ref_die_offset ();
18307 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18308 || cu
->per_cu
->is_dwz
);
18310 case DW_AT_sibling
:
18311 /* Ignore absolute siblings, they might point outside of
18312 the current compile unit. */
18313 if (attr
.form
== DW_FORM_ref_addr
)
18314 complaint (_("ignoring absolute DW_AT_sibling"));
18317 const gdb_byte
*buffer
= reader
->buffer
;
18318 sect_offset off
= attr
.get_ref_die_offset ();
18319 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18321 if (sibling_ptr
< info_ptr
)
18322 complaint (_("DW_AT_sibling points backwards"));
18323 else if (sibling_ptr
> reader
->buffer_end
)
18324 reader
->die_section
->overflow_complaint ();
18326 sibling
= sibling_ptr
;
18329 case DW_AT_byte_size
:
18332 case DW_AT_const_value
:
18333 has_const_value
= 1;
18335 case DW_AT_calling_convention
:
18336 /* DWARF doesn't provide a way to identify a program's source-level
18337 entry point. DW_AT_calling_convention attributes are only meant
18338 to describe functions' calling conventions.
18340 However, because it's a necessary piece of information in
18341 Fortran, and before DWARF 4 DW_CC_program was the only
18342 piece of debugging information whose definition refers to
18343 a 'main program' at all, several compilers marked Fortran
18344 main programs with DW_CC_program --- even when those
18345 functions use the standard calling conventions.
18347 Although DWARF now specifies a way to provide this
18348 information, we support this practice for backward
18350 if (DW_UNSND (&attr
) == DW_CC_program
18351 && cu
->language
== language_fortran
)
18352 main_subprogram
= 1;
18355 if (DW_UNSND (&attr
) == DW_INL_inlined
18356 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18357 may_be_inlined
= 1;
18361 if (tag
== DW_TAG_imported_unit
)
18363 d
.sect_off
= attr
.get_ref_die_offset ();
18364 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18365 || cu
->per_cu
->is_dwz
);
18369 case DW_AT_main_subprogram
:
18370 main_subprogram
= DW_UNSND (&attr
);
18375 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18376 but that requires a full DIE, so instead we just
18378 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18379 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18380 + (need_ranges_base
18384 /* Value of the DW_AT_ranges attribute is the offset in the
18385 .debug_ranges section. */
18386 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18397 /* For Ada, if both the name and the linkage name appear, we prefer
18398 the latter. This lets "catch exception" work better, regardless
18399 of the order in which the name and linkage name were emitted.
18400 Really, though, this is just a workaround for the fact that gdb
18401 doesn't store both the name and the linkage name. */
18402 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18403 name
= linkage_name
;
18405 if (high_pc_relative
)
18408 if (has_low_pc_attr
&& has_high_pc_attr
)
18410 /* When using the GNU linker, .gnu.linkonce. sections are used to
18411 eliminate duplicate copies of functions and vtables and such.
18412 The linker will arbitrarily choose one and discard the others.
18413 The AT_*_pc values for such functions refer to local labels in
18414 these sections. If the section from that file was discarded, the
18415 labels are not in the output, so the relocs get a value of 0.
18416 If this is a discarded function, mark the pc bounds as invalid,
18417 so that GDB will ignore it. */
18418 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18420 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18421 struct gdbarch
*gdbarch
= objfile
->arch ();
18423 complaint (_("DW_AT_low_pc %s is zero "
18424 "for DIE at %s [in module %s]"),
18425 paddress (gdbarch
, lowpc
),
18426 sect_offset_str (sect_off
),
18427 objfile_name (objfile
));
18429 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18430 else if (lowpc
>= highpc
)
18432 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18433 struct gdbarch
*gdbarch
= objfile
->arch ();
18435 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18436 "for DIE at %s [in module %s]"),
18437 paddress (gdbarch
, lowpc
),
18438 paddress (gdbarch
, highpc
),
18439 sect_offset_str (sect_off
),
18440 objfile_name (objfile
));
18449 /* Find a cached partial DIE at OFFSET in CU. */
18451 struct partial_die_info
*
18452 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18454 struct partial_die_info
*lookup_die
= NULL
;
18455 struct partial_die_info
part_die (sect_off
);
18457 lookup_die
= ((struct partial_die_info
*)
18458 htab_find_with_hash (partial_dies
, &part_die
,
18459 to_underlying (sect_off
)));
18464 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18465 except in the case of .debug_types DIEs which do not reference
18466 outside their CU (they do however referencing other types via
18467 DW_FORM_ref_sig8). */
18469 static const struct cu_partial_die_info
18470 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18472 struct dwarf2_per_objfile
*dwarf2_per_objfile
18473 = cu
->per_cu
->dwarf2_per_objfile
;
18474 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18475 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18476 struct partial_die_info
*pd
= NULL
;
18478 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18479 && cu
->header
.offset_in_cu_p (sect_off
))
18481 pd
= cu
->find_partial_die (sect_off
);
18484 /* We missed recording what we needed.
18485 Load all dies and try again. */
18486 per_cu
= cu
->per_cu
;
18490 /* TUs don't reference other CUs/TUs (except via type signatures). */
18491 if (cu
->per_cu
->is_debug_types
)
18493 error (_("Dwarf Error: Type Unit at offset %s contains"
18494 " external reference to offset %s [in module %s].\n"),
18495 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18496 bfd_get_filename (objfile
->obfd
));
18498 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18499 dwarf2_per_objfile
);
18501 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18502 load_partial_comp_unit (per_cu
);
18504 per_cu
->cu
->last_used
= 0;
18505 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18508 /* If we didn't find it, and not all dies have been loaded,
18509 load them all and try again. */
18511 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18513 per_cu
->load_all_dies
= 1;
18515 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18516 THIS_CU->cu may already be in use. So we can't just free it and
18517 replace its DIEs with the ones we read in. Instead, we leave those
18518 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18519 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18521 load_partial_comp_unit (per_cu
);
18523 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18527 internal_error (__FILE__
, __LINE__
,
18528 _("could not find partial DIE %s "
18529 "in cache [from module %s]\n"),
18530 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18531 return { per_cu
->cu
, pd
};
18534 /* See if we can figure out if the class lives in a namespace. We do
18535 this by looking for a member function; its demangled name will
18536 contain namespace info, if there is any. */
18539 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18540 struct dwarf2_cu
*cu
)
18542 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18543 what template types look like, because the demangler
18544 frequently doesn't give the same name as the debug info. We
18545 could fix this by only using the demangled name to get the
18546 prefix (but see comment in read_structure_type). */
18548 struct partial_die_info
*real_pdi
;
18549 struct partial_die_info
*child_pdi
;
18551 /* If this DIE (this DIE's specification, if any) has a parent, then
18552 we should not do this. We'll prepend the parent's fully qualified
18553 name when we create the partial symbol. */
18555 real_pdi
= struct_pdi
;
18556 while (real_pdi
->has_specification
)
18558 auto res
= find_partial_die (real_pdi
->spec_offset
,
18559 real_pdi
->spec_is_dwz
, cu
);
18560 real_pdi
= res
.pdi
;
18564 if (real_pdi
->die_parent
!= NULL
)
18567 for (child_pdi
= struct_pdi
->die_child
;
18569 child_pdi
= child_pdi
->die_sibling
)
18571 if (child_pdi
->tag
== DW_TAG_subprogram
18572 && child_pdi
->linkage_name
!= NULL
)
18574 gdb::unique_xmalloc_ptr
<char> actual_class_name
18575 (language_class_name_from_physname (cu
->language_defn
,
18576 child_pdi
->linkage_name
));
18577 if (actual_class_name
!= NULL
)
18579 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18580 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18587 /* Return true if a DIE with TAG may have the DW_AT_const_value
18591 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18595 case DW_TAG_constant
:
18596 case DW_TAG_enumerator
:
18597 case DW_TAG_formal_parameter
:
18598 case DW_TAG_template_value_param
:
18599 case DW_TAG_variable
:
18607 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18609 /* Once we've fixed up a die, there's no point in doing so again.
18610 This also avoids a memory leak if we were to call
18611 guess_partial_die_structure_name multiple times. */
18615 /* If we found a reference attribute and the DIE has no name, try
18616 to find a name in the referred to DIE. */
18618 if (name
== NULL
&& has_specification
)
18620 struct partial_die_info
*spec_die
;
18622 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18623 spec_die
= res
.pdi
;
18626 spec_die
->fixup (cu
);
18628 if (spec_die
->name
)
18630 name
= spec_die
->name
;
18632 /* Copy DW_AT_external attribute if it is set. */
18633 if (spec_die
->is_external
)
18634 is_external
= spec_die
->is_external
;
18638 if (!has_const_value
&& has_specification
18639 && can_have_DW_AT_const_value_p (tag
))
18641 struct partial_die_info
*spec_die
;
18643 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18644 spec_die
= res
.pdi
;
18647 spec_die
->fixup (cu
);
18649 if (spec_die
->has_const_value
)
18651 /* Copy DW_AT_const_value attribute if it is set. */
18652 has_const_value
= spec_die
->has_const_value
;
18656 /* Set default names for some unnamed DIEs. */
18658 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18659 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18661 /* If there is no parent die to provide a namespace, and there are
18662 children, see if we can determine the namespace from their linkage
18664 if (cu
->language
== language_cplus
18665 && !cu
->per_cu
->dwarf2_per_objfile
->types
.empty ()
18666 && die_parent
== NULL
18668 && (tag
== DW_TAG_class_type
18669 || tag
== DW_TAG_structure_type
18670 || tag
== DW_TAG_union_type
))
18671 guess_partial_die_structure_name (this, cu
);
18673 /* GCC might emit a nameless struct or union that has a linkage
18674 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18676 && (tag
== DW_TAG_class_type
18677 || tag
== DW_TAG_interface_type
18678 || tag
== DW_TAG_structure_type
18679 || tag
== DW_TAG_union_type
)
18680 && linkage_name
!= NULL
)
18682 gdb::unique_xmalloc_ptr
<char> demangled
18683 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18684 if (demangled
!= nullptr)
18688 /* Strip any leading namespaces/classes, keep only the base name.
18689 DW_AT_name for named DIEs does not contain the prefixes. */
18690 base
= strrchr (demangled
.get (), ':');
18691 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18694 base
= demangled
.get ();
18696 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18697 name
= objfile
->intern (base
);
18704 /* Read the .debug_loclists header contents from the given SECTION in the
18707 read_loclist_header (struct loclist_header
*header
,
18708 struct dwarf2_section_info
*section
)
18710 unsigned int bytes_read
;
18711 bfd
*abfd
= section
->get_bfd_owner ();
18712 const gdb_byte
*info_ptr
= section
->buffer
;
18713 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18714 info_ptr
+= bytes_read
;
18715 header
->version
= read_2_bytes (abfd
, info_ptr
);
18717 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18719 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18721 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18724 /* Return the DW_AT_loclists_base value for the CU. */
18726 lookup_loclist_base (struct dwarf2_cu
*cu
)
18728 /* For the .dwo unit, the loclist_base points to the first offset following
18729 the header. The header consists of the following entities-
18730 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18732 2. version (2 bytes)
18733 3. address size (1 byte)
18734 4. segment selector size (1 byte)
18735 5. offset entry count (4 bytes)
18736 These sizes are derived as per the DWARFv5 standard. */
18737 if (cu
->dwo_unit
!= nullptr)
18739 if (cu
->header
.initial_length_size
== 4)
18740 return LOCLIST_HEADER_SIZE32
;
18741 return LOCLIST_HEADER_SIZE64
;
18743 return cu
->loclist_base
;
18746 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18747 array of offsets in the .debug_loclists section. */
18749 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18751 struct dwarf2_per_objfile
*dwarf2_per_objfile
18752 = cu
->per_cu
->dwarf2_per_objfile
;
18753 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18754 bfd
*abfd
= objfile
->obfd
;
18755 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18756 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18758 section
->read (objfile
);
18759 if (section
->buffer
== NULL
)
18760 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18761 "section [in module %s]"), objfile_name (objfile
));
18762 struct loclist_header header
;
18763 read_loclist_header (&header
, section
);
18764 if (loclist_index
>= header
.offset_entry_count
)
18765 complaint (_("DW_FORM_loclistx pointing outside of "
18766 ".debug_loclists offset array [in module %s]"),
18767 objfile_name (objfile
));
18768 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18770 complaint (_("DW_FORM_loclistx pointing outside of "
18771 ".debug_loclists section [in module %s]"),
18772 objfile_name (objfile
));
18773 const gdb_byte
*info_ptr
18774 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18776 if (cu
->header
.offset_size
== 4)
18777 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18779 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18782 /* Process the attributes that had to be skipped in the first round. These
18783 attributes are the ones that need str_offsets_base or addr_base attributes.
18784 They could not have been processed in the first round, because at the time
18785 the values of str_offsets_base or addr_base may not have been known. */
18787 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18788 struct attribute
*attr
)
18790 struct dwarf2_cu
*cu
= reader
->cu
;
18791 switch (attr
->form
)
18793 case DW_FORM_addrx
:
18794 case DW_FORM_GNU_addr_index
:
18795 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18797 case DW_FORM_loclistx
:
18798 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18801 case DW_FORM_strx1
:
18802 case DW_FORM_strx2
:
18803 case DW_FORM_strx3
:
18804 case DW_FORM_strx4
:
18805 case DW_FORM_GNU_str_index
:
18807 unsigned int str_index
= DW_UNSND (attr
);
18808 if (reader
->dwo_file
!= NULL
)
18810 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18811 DW_STRING_IS_CANONICAL (attr
) = 0;
18815 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18816 DW_STRING_IS_CANONICAL (attr
) = 0;
18821 gdb_assert_not_reached (_("Unexpected DWARF form."));
18825 /* Read an attribute value described by an attribute form. */
18827 static const gdb_byte
*
18828 read_attribute_value (const struct die_reader_specs
*reader
,
18829 struct attribute
*attr
, unsigned form
,
18830 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
18831 bool *need_reprocess
)
18833 struct dwarf2_cu
*cu
= reader
->cu
;
18834 struct dwarf2_per_objfile
*dwarf2_per_objfile
18835 = cu
->per_cu
->dwarf2_per_objfile
;
18836 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18837 bfd
*abfd
= reader
->abfd
;
18838 struct comp_unit_head
*cu_header
= &cu
->header
;
18839 unsigned int bytes_read
;
18840 struct dwarf_block
*blk
;
18841 *need_reprocess
= false;
18843 attr
->form
= (enum dwarf_form
) form
;
18846 case DW_FORM_ref_addr
:
18847 if (cu
->header
.version
== 2)
18848 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
18851 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
18853 info_ptr
+= bytes_read
;
18855 case DW_FORM_GNU_ref_alt
:
18856 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18857 info_ptr
+= bytes_read
;
18861 struct gdbarch
*gdbarch
= objfile
->arch ();
18862 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
18863 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18864 info_ptr
+= bytes_read
;
18867 case DW_FORM_block2
:
18868 blk
= dwarf_alloc_block (cu
);
18869 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18871 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18872 info_ptr
+= blk
->size
;
18873 DW_BLOCK (attr
) = blk
;
18875 case DW_FORM_block4
:
18876 blk
= dwarf_alloc_block (cu
);
18877 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18879 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18880 info_ptr
+= blk
->size
;
18881 DW_BLOCK (attr
) = blk
;
18883 case DW_FORM_data2
:
18884 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18887 case DW_FORM_data4
:
18888 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18891 case DW_FORM_data8
:
18892 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18895 case DW_FORM_data16
:
18896 blk
= dwarf_alloc_block (cu
);
18898 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18900 DW_BLOCK (attr
) = blk
;
18902 case DW_FORM_sec_offset
:
18903 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
18904 info_ptr
+= bytes_read
;
18906 case DW_FORM_loclistx
:
18908 *need_reprocess
= true;
18909 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18910 info_ptr
+= bytes_read
;
18913 case DW_FORM_string
:
18914 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18915 DW_STRING_IS_CANONICAL (attr
) = 0;
18916 info_ptr
+= bytes_read
;
18919 if (!cu
->per_cu
->is_dwz
)
18921 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18922 abfd
, info_ptr
, cu_header
,
18924 DW_STRING_IS_CANONICAL (attr
) = 0;
18925 info_ptr
+= bytes_read
;
18929 case DW_FORM_line_strp
:
18930 if (!cu
->per_cu
->is_dwz
)
18933 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
18935 DW_STRING_IS_CANONICAL (attr
) = 0;
18936 info_ptr
+= bytes_read
;
18940 case DW_FORM_GNU_strp_alt
:
18942 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18943 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
18946 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
18947 DW_STRING_IS_CANONICAL (attr
) = 0;
18948 info_ptr
+= bytes_read
;
18951 case DW_FORM_exprloc
:
18952 case DW_FORM_block
:
18953 blk
= dwarf_alloc_block (cu
);
18954 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18955 info_ptr
+= bytes_read
;
18956 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18957 info_ptr
+= blk
->size
;
18958 DW_BLOCK (attr
) = blk
;
18960 case DW_FORM_block1
:
18961 blk
= dwarf_alloc_block (cu
);
18962 blk
->size
= read_1_byte (abfd
, info_ptr
);
18964 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18965 info_ptr
+= blk
->size
;
18966 DW_BLOCK (attr
) = blk
;
18968 case DW_FORM_data1
:
18969 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18973 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18976 case DW_FORM_flag_present
:
18977 DW_UNSND (attr
) = 1;
18979 case DW_FORM_sdata
:
18980 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18981 info_ptr
+= bytes_read
;
18983 case DW_FORM_udata
:
18984 case DW_FORM_rnglistx
:
18985 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18986 info_ptr
+= bytes_read
;
18989 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18990 + read_1_byte (abfd
, info_ptr
));
18994 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18995 + read_2_bytes (abfd
, info_ptr
));
18999 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19000 + read_4_bytes (abfd
, info_ptr
));
19004 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19005 + read_8_bytes (abfd
, info_ptr
));
19008 case DW_FORM_ref_sig8
:
19009 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19012 case DW_FORM_ref_udata
:
19013 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19014 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19015 info_ptr
+= bytes_read
;
19017 case DW_FORM_indirect
:
19018 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19019 info_ptr
+= bytes_read
;
19020 if (form
== DW_FORM_implicit_const
)
19022 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19023 info_ptr
+= bytes_read
;
19025 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19026 info_ptr
, need_reprocess
);
19028 case DW_FORM_implicit_const
:
19029 DW_SND (attr
) = implicit_const
;
19031 case DW_FORM_addrx
:
19032 case DW_FORM_GNU_addr_index
:
19033 *need_reprocess
= true;
19034 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19035 info_ptr
+= bytes_read
;
19038 case DW_FORM_strx1
:
19039 case DW_FORM_strx2
:
19040 case DW_FORM_strx3
:
19041 case DW_FORM_strx4
:
19042 case DW_FORM_GNU_str_index
:
19044 ULONGEST str_index
;
19045 if (form
== DW_FORM_strx1
)
19047 str_index
= read_1_byte (abfd
, info_ptr
);
19050 else if (form
== DW_FORM_strx2
)
19052 str_index
= read_2_bytes (abfd
, info_ptr
);
19055 else if (form
== DW_FORM_strx3
)
19057 str_index
= read_3_bytes (abfd
, info_ptr
);
19060 else if (form
== DW_FORM_strx4
)
19062 str_index
= read_4_bytes (abfd
, info_ptr
);
19067 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19068 info_ptr
+= bytes_read
;
19070 *need_reprocess
= true;
19071 DW_UNSND (attr
) = str_index
;
19075 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19076 dwarf_form_name (form
),
19077 bfd_get_filename (abfd
));
19081 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19082 attr
->form
= DW_FORM_GNU_ref_alt
;
19084 /* We have seen instances where the compiler tried to emit a byte
19085 size attribute of -1 which ended up being encoded as an unsigned
19086 0xffffffff. Although 0xffffffff is technically a valid size value,
19087 an object of this size seems pretty unlikely so we can relatively
19088 safely treat these cases as if the size attribute was invalid and
19089 treat them as zero by default. */
19090 if (attr
->name
== DW_AT_byte_size
19091 && form
== DW_FORM_data4
19092 && DW_UNSND (attr
) >= 0xffffffff)
19095 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19096 hex_string (DW_UNSND (attr
)));
19097 DW_UNSND (attr
) = 0;
19103 /* Read an attribute described by an abbreviated attribute. */
19105 static const gdb_byte
*
19106 read_attribute (const struct die_reader_specs
*reader
,
19107 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19108 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19110 attr
->name
= abbrev
->name
;
19111 return read_attribute_value (reader
, attr
, abbrev
->form
,
19112 abbrev
->implicit_const
, info_ptr
,
19116 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19118 static const char *
19119 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19120 LONGEST str_offset
)
19122 return dwarf2_per_objfile
->str
.read_string (dwarf2_per_objfile
->objfile
,
19123 str_offset
, "DW_FORM_strp");
19126 /* Return pointer to string at .debug_str offset as read from BUF.
19127 BUF is assumed to be in a compilation unit described by CU_HEADER.
19128 Return *BYTES_READ_PTR count of bytes read from BUF. */
19130 static const char *
19131 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19132 const gdb_byte
*buf
,
19133 const struct comp_unit_head
*cu_header
,
19134 unsigned int *bytes_read_ptr
)
19136 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19138 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19144 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19145 const struct comp_unit_head
*cu_header
,
19146 unsigned int *bytes_read_ptr
)
19148 bfd
*abfd
= objfile
->obfd
;
19149 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19151 return line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19154 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19155 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19156 ADDR_SIZE is the size of addresses from the CU header. */
19159 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19160 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19163 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19164 bfd
*abfd
= objfile
->obfd
;
19165 const gdb_byte
*info_ptr
;
19166 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19168 dwarf2_per_objfile
->addr
.read (objfile
);
19169 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19170 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19171 objfile_name (objfile
));
19172 if (addr_base_or_zero
+ addr_index
* addr_size
19173 >= dwarf2_per_objfile
->addr
.size
)
19174 error (_("DW_FORM_addr_index pointing outside of "
19175 ".debug_addr section [in module %s]"),
19176 objfile_name (objfile
));
19177 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19178 + addr_base_or_zero
+ addr_index
* addr_size
);
19179 if (addr_size
== 4)
19180 return bfd_get_32 (abfd
, info_ptr
);
19182 return bfd_get_64 (abfd
, info_ptr
);
19185 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19188 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19190 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19191 cu
->addr_base
, cu
->header
.addr_size
);
19194 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19197 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19198 unsigned int *bytes_read
)
19200 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19201 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19203 return read_addr_index (cu
, addr_index
);
19209 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19211 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19212 struct dwarf2_cu
*cu
= per_cu
->cu
;
19213 gdb::optional
<ULONGEST
> addr_base
;
19216 /* We need addr_base and addr_size.
19217 If we don't have PER_CU->cu, we have to get it.
19218 Nasty, but the alternative is storing the needed info in PER_CU,
19219 which at this point doesn't seem justified: it's not clear how frequently
19220 it would get used and it would increase the size of every PER_CU.
19221 Entry points like dwarf2_per_cu_addr_size do a similar thing
19222 so we're not in uncharted territory here.
19223 Alas we need to be a bit more complicated as addr_base is contained
19226 We don't need to read the entire CU(/TU).
19227 We just need the header and top level die.
19229 IWBN to use the aging mechanism to let us lazily later discard the CU.
19230 For now we skip this optimization. */
19234 addr_base
= cu
->addr_base
;
19235 addr_size
= cu
->header
.addr_size
;
19239 cutu_reader
reader (per_cu
, NULL
, 0, false);
19240 addr_base
= reader
.cu
->addr_base
;
19241 addr_size
= reader
.cu
->header
.addr_size
;
19244 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19248 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19249 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19252 static const char *
19253 read_str_index (struct dwarf2_cu
*cu
,
19254 struct dwarf2_section_info
*str_section
,
19255 struct dwarf2_section_info
*str_offsets_section
,
19256 ULONGEST str_offsets_base
, ULONGEST str_index
)
19258 struct dwarf2_per_objfile
*dwarf2_per_objfile
19259 = cu
->per_cu
->dwarf2_per_objfile
;
19260 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19261 const char *objf_name
= objfile_name (objfile
);
19262 bfd
*abfd
= objfile
->obfd
;
19263 const gdb_byte
*info_ptr
;
19264 ULONGEST str_offset
;
19265 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19267 str_section
->read (objfile
);
19268 str_offsets_section
->read (objfile
);
19269 if (str_section
->buffer
== NULL
)
19270 error (_("%s used without %s section"
19271 " in CU at offset %s [in module %s]"),
19272 form_name
, str_section
->get_name (),
19273 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19274 if (str_offsets_section
->buffer
== NULL
)
19275 error (_("%s used without %s section"
19276 " in CU at offset %s [in module %s]"),
19277 form_name
, str_section
->get_name (),
19278 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19279 info_ptr
= (str_offsets_section
->buffer
19281 + str_index
* cu
->header
.offset_size
);
19282 if (cu
->header
.offset_size
== 4)
19283 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19285 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19286 if (str_offset
>= str_section
->size
)
19287 error (_("Offset from %s pointing outside of"
19288 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19289 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19290 return (const char *) (str_section
->buffer
+ str_offset
);
19293 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19295 static const char *
19296 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19298 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19299 ? reader
->cu
->header
.addr_size
: 0;
19300 return read_str_index (reader
->cu
,
19301 &reader
->dwo_file
->sections
.str
,
19302 &reader
->dwo_file
->sections
.str_offsets
,
19303 str_offsets_base
, str_index
);
19306 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19308 static const char *
19309 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19311 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19312 const char *objf_name
= objfile_name (objfile
);
19313 static const char form_name
[] = "DW_FORM_GNU_str_index";
19314 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19316 if (!cu
->str_offsets_base
.has_value ())
19317 error (_("%s used in Fission stub without %s"
19318 " in CU at offset 0x%lx [in module %s]"),
19319 form_name
, str_offsets_attr_name
,
19320 (long) cu
->header
.offset_size
, objf_name
);
19322 return read_str_index (cu
,
19323 &cu
->per_cu
->dwarf2_per_objfile
->str
,
19324 &cu
->per_cu
->dwarf2_per_objfile
->str_offsets
,
19325 *cu
->str_offsets_base
, str_index
);
19328 /* Return the length of an LEB128 number in BUF. */
19331 leb128_size (const gdb_byte
*buf
)
19333 const gdb_byte
*begin
= buf
;
19339 if ((byte
& 128) == 0)
19340 return buf
- begin
;
19345 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19354 cu
->language
= language_c
;
19357 case DW_LANG_C_plus_plus
:
19358 case DW_LANG_C_plus_plus_11
:
19359 case DW_LANG_C_plus_plus_14
:
19360 cu
->language
= language_cplus
;
19363 cu
->language
= language_d
;
19365 case DW_LANG_Fortran77
:
19366 case DW_LANG_Fortran90
:
19367 case DW_LANG_Fortran95
:
19368 case DW_LANG_Fortran03
:
19369 case DW_LANG_Fortran08
:
19370 cu
->language
= language_fortran
;
19373 cu
->language
= language_go
;
19375 case DW_LANG_Mips_Assembler
:
19376 cu
->language
= language_asm
;
19378 case DW_LANG_Ada83
:
19379 case DW_LANG_Ada95
:
19380 cu
->language
= language_ada
;
19382 case DW_LANG_Modula2
:
19383 cu
->language
= language_m2
;
19385 case DW_LANG_Pascal83
:
19386 cu
->language
= language_pascal
;
19389 cu
->language
= language_objc
;
19392 case DW_LANG_Rust_old
:
19393 cu
->language
= language_rust
;
19395 case DW_LANG_Cobol74
:
19396 case DW_LANG_Cobol85
:
19398 cu
->language
= language_minimal
;
19401 cu
->language_defn
= language_def (cu
->language
);
19404 /* Return the named attribute or NULL if not there. */
19406 static struct attribute
*
19407 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19412 struct attribute
*spec
= NULL
;
19414 for (i
= 0; i
< die
->num_attrs
; ++i
)
19416 if (die
->attrs
[i
].name
== name
)
19417 return &die
->attrs
[i
];
19418 if (die
->attrs
[i
].name
== DW_AT_specification
19419 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19420 spec
= &die
->attrs
[i
];
19426 die
= follow_die_ref (die
, spec
, &cu
);
19432 /* Return the string associated with a string-typed attribute, or NULL if it
19433 is either not found or is of an incorrect type. */
19435 static const char *
19436 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19438 struct attribute
*attr
;
19439 const char *str
= NULL
;
19441 attr
= dwarf2_attr (die
, name
, cu
);
19445 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19446 || attr
->form
== DW_FORM_string
19447 || attr
->form
== DW_FORM_strx
19448 || attr
->form
== DW_FORM_strx1
19449 || attr
->form
== DW_FORM_strx2
19450 || attr
->form
== DW_FORM_strx3
19451 || attr
->form
== DW_FORM_strx4
19452 || attr
->form
== DW_FORM_GNU_str_index
19453 || attr
->form
== DW_FORM_GNU_strp_alt
)
19454 str
= DW_STRING (attr
);
19456 complaint (_("string type expected for attribute %s for "
19457 "DIE at %s in module %s"),
19458 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19459 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19465 /* Return the dwo name or NULL if not present. If present, it is in either
19466 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19467 static const char *
19468 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19470 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19471 if (dwo_name
== nullptr)
19472 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19476 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19477 and holds a non-zero value. This function should only be used for
19478 DW_FORM_flag or DW_FORM_flag_present attributes. */
19481 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19483 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19485 return (attr
&& DW_UNSND (attr
));
19489 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19491 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19492 which value is non-zero. However, we have to be careful with
19493 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19494 (via dwarf2_flag_true_p) follows this attribute. So we may
19495 end up accidently finding a declaration attribute that belongs
19496 to a different DIE referenced by the specification attribute,
19497 even though the given DIE does not have a declaration attribute. */
19498 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19499 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19502 /* Return the die giving the specification for DIE, if there is
19503 one. *SPEC_CU is the CU containing DIE on input, and the CU
19504 containing the return value on output. If there is no
19505 specification, but there is an abstract origin, that is
19508 static struct die_info
*
19509 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19511 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19514 if (spec_attr
== NULL
)
19515 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19517 if (spec_attr
== NULL
)
19520 return follow_die_ref (die
, spec_attr
, spec_cu
);
19523 /* Stub for free_line_header to match void * callback types. */
19526 free_line_header_voidp (void *arg
)
19528 struct line_header
*lh
= (struct line_header
*) arg
;
19533 /* A convenience function to find the proper .debug_line section for a CU. */
19535 static struct dwarf2_section_info
*
19536 get_debug_line_section (struct dwarf2_cu
*cu
)
19538 struct dwarf2_section_info
*section
;
19539 struct dwarf2_per_objfile
*dwarf2_per_objfile
19540 = cu
->per_cu
->dwarf2_per_objfile
;
19542 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19544 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19545 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19546 else if (cu
->per_cu
->is_dwz
)
19548 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19550 section
= &dwz
->line
;
19553 section
= &dwarf2_per_objfile
->line
;
19558 /* Read the statement program header starting at OFFSET in
19559 .debug_line, or .debug_line.dwo. Return a pointer
19560 to a struct line_header, allocated using xmalloc.
19561 Returns NULL if there is a problem reading the header, e.g., if it
19562 has a version we don't understand.
19564 NOTE: the strings in the include directory and file name tables of
19565 the returned object point into the dwarf line section buffer,
19566 and must not be freed. */
19568 static line_header_up
19569 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19571 struct dwarf2_section_info
*section
;
19572 struct dwarf2_per_objfile
*dwarf2_per_objfile
19573 = cu
->per_cu
->dwarf2_per_objfile
;
19575 section
= get_debug_line_section (cu
);
19576 section
->read (dwarf2_per_objfile
->objfile
);
19577 if (section
->buffer
== NULL
)
19579 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19580 complaint (_("missing .debug_line.dwo section"));
19582 complaint (_("missing .debug_line section"));
19586 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19587 dwarf2_per_objfile
, section
,
19591 /* Subroutine of dwarf_decode_lines to simplify it.
19592 Return the file name of the psymtab for the given file_entry.
19593 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19594 If space for the result is malloc'd, *NAME_HOLDER will be set.
19595 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19597 static const char *
19598 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19599 const dwarf2_psymtab
*pst
,
19600 const char *comp_dir
,
19601 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19603 const char *include_name
= fe
.name
;
19604 const char *include_name_to_compare
= include_name
;
19605 const char *pst_filename
;
19608 const char *dir_name
= fe
.include_dir (lh
);
19610 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19611 if (!IS_ABSOLUTE_PATH (include_name
)
19612 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19614 /* Avoid creating a duplicate psymtab for PST.
19615 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19616 Before we do the comparison, however, we need to account
19617 for DIR_NAME and COMP_DIR.
19618 First prepend dir_name (if non-NULL). If we still don't
19619 have an absolute path prepend comp_dir (if non-NULL).
19620 However, the directory we record in the include-file's
19621 psymtab does not contain COMP_DIR (to match the
19622 corresponding symtab(s)).
19627 bash$ gcc -g ./hello.c
19628 include_name = "hello.c"
19630 DW_AT_comp_dir = comp_dir = "/tmp"
19631 DW_AT_name = "./hello.c"
19635 if (dir_name
!= NULL
)
19637 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19638 include_name
, (char *) NULL
));
19639 include_name
= name_holder
->get ();
19640 include_name_to_compare
= include_name
;
19642 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19644 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19645 include_name
, (char *) NULL
));
19646 include_name_to_compare
= hold_compare
.get ();
19650 pst_filename
= pst
->filename
;
19651 gdb::unique_xmalloc_ptr
<char> copied_name
;
19652 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19654 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19655 pst_filename
, (char *) NULL
));
19656 pst_filename
= copied_name
.get ();
19659 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19663 return include_name
;
19666 /* State machine to track the state of the line number program. */
19668 class lnp_state_machine
19671 /* Initialize a machine state for the start of a line number
19673 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19674 bool record_lines_p
);
19676 file_entry
*current_file ()
19678 /* lh->file_names is 0-based, but the file name numbers in the
19679 statement program are 1-based. */
19680 return m_line_header
->file_name_at (m_file
);
19683 /* Record the line in the state machine. END_SEQUENCE is true if
19684 we're processing the end of a sequence. */
19685 void record_line (bool end_sequence
);
19687 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19688 nop-out rest of the lines in this sequence. */
19689 void check_line_address (struct dwarf2_cu
*cu
,
19690 const gdb_byte
*line_ptr
,
19691 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19693 void handle_set_discriminator (unsigned int discriminator
)
19695 m_discriminator
= discriminator
;
19696 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19699 /* Handle DW_LNE_set_address. */
19700 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19703 address
+= baseaddr
;
19704 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19707 /* Handle DW_LNS_advance_pc. */
19708 void handle_advance_pc (CORE_ADDR adjust
);
19710 /* Handle a special opcode. */
19711 void handle_special_opcode (unsigned char op_code
);
19713 /* Handle DW_LNS_advance_line. */
19714 void handle_advance_line (int line_delta
)
19716 advance_line (line_delta
);
19719 /* Handle DW_LNS_set_file. */
19720 void handle_set_file (file_name_index file
);
19722 /* Handle DW_LNS_negate_stmt. */
19723 void handle_negate_stmt ()
19725 m_is_stmt
= !m_is_stmt
;
19728 /* Handle DW_LNS_const_add_pc. */
19729 void handle_const_add_pc ();
19731 /* Handle DW_LNS_fixed_advance_pc. */
19732 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19734 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19738 /* Handle DW_LNS_copy. */
19739 void handle_copy ()
19741 record_line (false);
19742 m_discriminator
= 0;
19745 /* Handle DW_LNE_end_sequence. */
19746 void handle_end_sequence ()
19748 m_currently_recording_lines
= true;
19752 /* Advance the line by LINE_DELTA. */
19753 void advance_line (int line_delta
)
19755 m_line
+= line_delta
;
19757 if (line_delta
!= 0)
19758 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19761 struct dwarf2_cu
*m_cu
;
19763 gdbarch
*m_gdbarch
;
19765 /* True if we're recording lines.
19766 Otherwise we're building partial symtabs and are just interested in
19767 finding include files mentioned by the line number program. */
19768 bool m_record_lines_p
;
19770 /* The line number header. */
19771 line_header
*m_line_header
;
19773 /* These are part of the standard DWARF line number state machine,
19774 and initialized according to the DWARF spec. */
19776 unsigned char m_op_index
= 0;
19777 /* The line table index of the current file. */
19778 file_name_index m_file
= 1;
19779 unsigned int m_line
= 1;
19781 /* These are initialized in the constructor. */
19783 CORE_ADDR m_address
;
19785 unsigned int m_discriminator
;
19787 /* Additional bits of state we need to track. */
19789 /* The last file that we called dwarf2_start_subfile for.
19790 This is only used for TLLs. */
19791 unsigned int m_last_file
= 0;
19792 /* The last file a line number was recorded for. */
19793 struct subfile
*m_last_subfile
= NULL
;
19795 /* When true, record the lines we decode. */
19796 bool m_currently_recording_lines
= false;
19798 /* The last line number that was recorded, used to coalesce
19799 consecutive entries for the same line. This can happen, for
19800 example, when discriminators are present. PR 17276. */
19801 unsigned int m_last_line
= 0;
19802 bool m_line_has_non_zero_discriminator
= false;
19806 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19808 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19809 / m_line_header
->maximum_ops_per_instruction
)
19810 * m_line_header
->minimum_instruction_length
);
19811 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19812 m_op_index
= ((m_op_index
+ adjust
)
19813 % m_line_header
->maximum_ops_per_instruction
);
19817 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19819 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19820 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19821 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19822 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19823 / m_line_header
->maximum_ops_per_instruction
)
19824 * m_line_header
->minimum_instruction_length
);
19825 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19826 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19827 % m_line_header
->maximum_ops_per_instruction
);
19829 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
19830 advance_line (line_delta
);
19831 record_line (false);
19832 m_discriminator
= 0;
19836 lnp_state_machine::handle_set_file (file_name_index file
)
19840 const file_entry
*fe
= current_file ();
19842 dwarf2_debug_line_missing_file_complaint ();
19843 else if (m_record_lines_p
)
19845 const char *dir
= fe
->include_dir (m_line_header
);
19847 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
19848 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19849 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
19854 lnp_state_machine::handle_const_add_pc ()
19857 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
19860 = (((m_op_index
+ adjust
)
19861 / m_line_header
->maximum_ops_per_instruction
)
19862 * m_line_header
->minimum_instruction_length
);
19864 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19865 m_op_index
= ((m_op_index
+ adjust
)
19866 % m_line_header
->maximum_ops_per_instruction
);
19869 /* Return non-zero if we should add LINE to the line number table.
19870 LINE is the line to add, LAST_LINE is the last line that was added,
19871 LAST_SUBFILE is the subfile for LAST_LINE.
19872 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
19873 had a non-zero discriminator.
19875 We have to be careful in the presence of discriminators.
19876 E.g., for this line:
19878 for (i = 0; i < 100000; i++);
19880 clang can emit four line number entries for that one line,
19881 each with a different discriminator.
19882 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19884 However, we want gdb to coalesce all four entries into one.
19885 Otherwise the user could stepi into the middle of the line and
19886 gdb would get confused about whether the pc really was in the
19887 middle of the line.
19889 Things are further complicated by the fact that two consecutive
19890 line number entries for the same line is a heuristic used by gcc
19891 to denote the end of the prologue. So we can't just discard duplicate
19892 entries, we have to be selective about it. The heuristic we use is
19893 that we only collapse consecutive entries for the same line if at least
19894 one of those entries has a non-zero discriminator. PR 17276.
19896 Note: Addresses in the line number state machine can never go backwards
19897 within one sequence, thus this coalescing is ok. */
19900 dwarf_record_line_p (struct dwarf2_cu
*cu
,
19901 unsigned int line
, unsigned int last_line
,
19902 int line_has_non_zero_discriminator
,
19903 struct subfile
*last_subfile
)
19905 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
19907 if (line
!= last_line
)
19909 /* Same line for the same file that we've seen already.
19910 As a last check, for pr 17276, only record the line if the line
19911 has never had a non-zero discriminator. */
19912 if (!line_has_non_zero_discriminator
)
19917 /* Use the CU's builder to record line number LINE beginning at
19918 address ADDRESS in the line table of subfile SUBFILE. */
19921 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19922 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
19923 struct dwarf2_cu
*cu
)
19925 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19927 if (dwarf_line_debug
)
19929 fprintf_unfiltered (gdb_stdlog
,
19930 "Recording line %u, file %s, address %s\n",
19931 line
, lbasename (subfile
->name
),
19932 paddress (gdbarch
, address
));
19936 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
19939 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19940 Mark the end of a set of line number records.
19941 The arguments are the same as for dwarf_record_line_1.
19942 If SUBFILE is NULL the request is ignored. */
19945 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19946 CORE_ADDR address
, struct dwarf2_cu
*cu
)
19948 if (subfile
== NULL
)
19951 if (dwarf_line_debug
)
19953 fprintf_unfiltered (gdb_stdlog
,
19954 "Finishing current line, file %s, address %s\n",
19955 lbasename (subfile
->name
),
19956 paddress (gdbarch
, address
));
19959 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
19963 lnp_state_machine::record_line (bool end_sequence
)
19965 if (dwarf_line_debug
)
19967 fprintf_unfiltered (gdb_stdlog
,
19968 "Processing actual line %u: file %u,"
19969 " address %s, is_stmt %u, discrim %u%s\n",
19971 paddress (m_gdbarch
, m_address
),
19972 m_is_stmt
, m_discriminator
,
19973 (end_sequence
? "\t(end sequence)" : ""));
19976 file_entry
*fe
= current_file ();
19979 dwarf2_debug_line_missing_file_complaint ();
19980 /* For now we ignore lines not starting on an instruction boundary.
19981 But not when processing end_sequence for compatibility with the
19982 previous version of the code. */
19983 else if (m_op_index
== 0 || end_sequence
)
19985 fe
->included_p
= 1;
19986 if (m_record_lines_p
)
19988 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
19991 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
19992 m_currently_recording_lines
? m_cu
: nullptr);
19997 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
19999 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20000 m_line_has_non_zero_discriminator
,
20003 buildsym_compunit
*builder
= m_cu
->get_builder ();
20004 dwarf_record_line_1 (m_gdbarch
,
20005 builder
->get_current_subfile (),
20006 m_line
, m_address
, is_stmt
,
20007 m_currently_recording_lines
? m_cu
: nullptr);
20009 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20010 m_last_line
= m_line
;
20016 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20017 line_header
*lh
, bool record_lines_p
)
20021 m_record_lines_p
= record_lines_p
;
20022 m_line_header
= lh
;
20024 m_currently_recording_lines
= true;
20026 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20027 was a line entry for it so that the backend has a chance to adjust it
20028 and also record it in case it needs it. This is currently used by MIPS
20029 code, cf. `mips_adjust_dwarf2_line'. */
20030 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20031 m_is_stmt
= lh
->default_is_stmt
;
20032 m_discriminator
= 0;
20036 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20037 const gdb_byte
*line_ptr
,
20038 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20040 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20041 the pc range of the CU. However, we restrict the test to only ADDRESS
20042 values of zero to preserve GDB's previous behaviour which is to handle
20043 the specific case of a function being GC'd by the linker. */
20045 if (address
== 0 && address
< unrelocated_lowpc
)
20047 /* This line table is for a function which has been
20048 GCd by the linker. Ignore it. PR gdb/12528 */
20050 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20051 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20053 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20054 line_offset
, objfile_name (objfile
));
20055 m_currently_recording_lines
= false;
20056 /* Note: m_currently_recording_lines is left as false until we see
20057 DW_LNE_end_sequence. */
20061 /* Subroutine of dwarf_decode_lines to simplify it.
20062 Process the line number information in LH.
20063 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20064 program in order to set included_p for every referenced header. */
20067 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20068 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20070 const gdb_byte
*line_ptr
, *extended_end
;
20071 const gdb_byte
*line_end
;
20072 unsigned int bytes_read
, extended_len
;
20073 unsigned char op_code
, extended_op
;
20074 CORE_ADDR baseaddr
;
20075 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20076 bfd
*abfd
= objfile
->obfd
;
20077 struct gdbarch
*gdbarch
= objfile
->arch ();
20078 /* True if we're recording line info (as opposed to building partial
20079 symtabs and just interested in finding include files mentioned by
20080 the line number program). */
20081 bool record_lines_p
= !decode_for_pst_p
;
20083 baseaddr
= objfile
->text_section_offset ();
20085 line_ptr
= lh
->statement_program_start
;
20086 line_end
= lh
->statement_program_end
;
20088 /* Read the statement sequences until there's nothing left. */
20089 while (line_ptr
< line_end
)
20091 /* The DWARF line number program state machine. Reset the state
20092 machine at the start of each sequence. */
20093 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20094 bool end_sequence
= false;
20096 if (record_lines_p
)
20098 /* Start a subfile for the current file of the state
20100 const file_entry
*fe
= state_machine
.current_file ();
20103 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20106 /* Decode the table. */
20107 while (line_ptr
< line_end
&& !end_sequence
)
20109 op_code
= read_1_byte (abfd
, line_ptr
);
20112 if (op_code
>= lh
->opcode_base
)
20114 /* Special opcode. */
20115 state_machine
.handle_special_opcode (op_code
);
20117 else switch (op_code
)
20119 case DW_LNS_extended_op
:
20120 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20122 line_ptr
+= bytes_read
;
20123 extended_end
= line_ptr
+ extended_len
;
20124 extended_op
= read_1_byte (abfd
, line_ptr
);
20126 switch (extended_op
)
20128 case DW_LNE_end_sequence
:
20129 state_machine
.handle_end_sequence ();
20130 end_sequence
= true;
20132 case DW_LNE_set_address
:
20135 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20136 line_ptr
+= bytes_read
;
20138 state_machine
.check_line_address (cu
, line_ptr
,
20139 lowpc
- baseaddr
, address
);
20140 state_machine
.handle_set_address (baseaddr
, address
);
20143 case DW_LNE_define_file
:
20145 const char *cur_file
;
20146 unsigned int mod_time
, length
;
20149 cur_file
= read_direct_string (abfd
, line_ptr
,
20151 line_ptr
+= bytes_read
;
20152 dindex
= (dir_index
)
20153 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20154 line_ptr
+= bytes_read
;
20156 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20157 line_ptr
+= bytes_read
;
20159 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20160 line_ptr
+= bytes_read
;
20161 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20164 case DW_LNE_set_discriminator
:
20166 /* The discriminator is not interesting to the
20167 debugger; just ignore it. We still need to
20168 check its value though:
20169 if there are consecutive entries for the same
20170 (non-prologue) line we want to coalesce them.
20173 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20174 line_ptr
+= bytes_read
;
20176 state_machine
.handle_set_discriminator (discr
);
20180 complaint (_("mangled .debug_line section"));
20183 /* Make sure that we parsed the extended op correctly. If e.g.
20184 we expected a different address size than the producer used,
20185 we may have read the wrong number of bytes. */
20186 if (line_ptr
!= extended_end
)
20188 complaint (_("mangled .debug_line section"));
20193 state_machine
.handle_copy ();
20195 case DW_LNS_advance_pc
:
20198 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20199 line_ptr
+= bytes_read
;
20201 state_machine
.handle_advance_pc (adjust
);
20204 case DW_LNS_advance_line
:
20207 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20208 line_ptr
+= bytes_read
;
20210 state_machine
.handle_advance_line (line_delta
);
20213 case DW_LNS_set_file
:
20215 file_name_index file
20216 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20218 line_ptr
+= bytes_read
;
20220 state_machine
.handle_set_file (file
);
20223 case DW_LNS_set_column
:
20224 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20225 line_ptr
+= bytes_read
;
20227 case DW_LNS_negate_stmt
:
20228 state_machine
.handle_negate_stmt ();
20230 case DW_LNS_set_basic_block
:
20232 /* Add to the address register of the state machine the
20233 address increment value corresponding to special opcode
20234 255. I.e., this value is scaled by the minimum
20235 instruction length since special opcode 255 would have
20236 scaled the increment. */
20237 case DW_LNS_const_add_pc
:
20238 state_machine
.handle_const_add_pc ();
20240 case DW_LNS_fixed_advance_pc
:
20242 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20245 state_machine
.handle_fixed_advance_pc (addr_adj
);
20250 /* Unknown standard opcode, ignore it. */
20253 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20255 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20256 line_ptr
+= bytes_read
;
20263 dwarf2_debug_line_missing_end_sequence_complaint ();
20265 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20266 in which case we still finish recording the last line). */
20267 state_machine
.record_line (true);
20271 /* Decode the Line Number Program (LNP) for the given line_header
20272 structure and CU. The actual information extracted and the type
20273 of structures created from the LNP depends on the value of PST.
20275 1. If PST is NULL, then this procedure uses the data from the program
20276 to create all necessary symbol tables, and their linetables.
20278 2. If PST is not NULL, this procedure reads the program to determine
20279 the list of files included by the unit represented by PST, and
20280 builds all the associated partial symbol tables.
20282 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20283 It is used for relative paths in the line table.
20284 NOTE: When processing partial symtabs (pst != NULL),
20285 comp_dir == pst->dirname.
20287 NOTE: It is important that psymtabs have the same file name (via strcmp)
20288 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20289 symtab we don't use it in the name of the psymtabs we create.
20290 E.g. expand_line_sal requires this when finding psymtabs to expand.
20291 A good testcase for this is mb-inline.exp.
20293 LOWPC is the lowest address in CU (or 0 if not known).
20295 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20296 for its PC<->lines mapping information. Otherwise only the filename
20297 table is read in. */
20300 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20301 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20302 CORE_ADDR lowpc
, int decode_mapping
)
20304 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20305 const int decode_for_pst_p
= (pst
!= NULL
);
20307 if (decode_mapping
)
20308 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20310 if (decode_for_pst_p
)
20312 /* Now that we're done scanning the Line Header Program, we can
20313 create the psymtab of each included file. */
20314 for (auto &file_entry
: lh
->file_names ())
20315 if (file_entry
.included_p
== 1)
20317 gdb::unique_xmalloc_ptr
<char> name_holder
;
20318 const char *include_name
=
20319 psymtab_include_file_name (lh
, file_entry
, pst
,
20320 comp_dir
, &name_holder
);
20321 if (include_name
!= NULL
)
20322 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20327 /* Make sure a symtab is created for every file, even files
20328 which contain only variables (i.e. no code with associated
20330 buildsym_compunit
*builder
= cu
->get_builder ();
20331 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20333 for (auto &fe
: lh
->file_names ())
20335 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20336 if (builder
->get_current_subfile ()->symtab
== NULL
)
20338 builder
->get_current_subfile ()->symtab
20339 = allocate_symtab (cust
,
20340 builder
->get_current_subfile ()->name
);
20342 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20347 /* Start a subfile for DWARF. FILENAME is the name of the file and
20348 DIRNAME the name of the source directory which contains FILENAME
20349 or NULL if not known.
20350 This routine tries to keep line numbers from identical absolute and
20351 relative file names in a common subfile.
20353 Using the `list' example from the GDB testsuite, which resides in
20354 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20355 of /srcdir/list0.c yields the following debugging information for list0.c:
20357 DW_AT_name: /srcdir/list0.c
20358 DW_AT_comp_dir: /compdir
20359 files.files[0].name: list0.h
20360 files.files[0].dir: /srcdir
20361 files.files[1].name: list0.c
20362 files.files[1].dir: /srcdir
20364 The line number information for list0.c has to end up in a single
20365 subfile, so that `break /srcdir/list0.c:1' works as expected.
20366 start_subfile will ensure that this happens provided that we pass the
20367 concatenation of files.files[1].dir and files.files[1].name as the
20371 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20372 const char *dirname
)
20374 gdb::unique_xmalloc_ptr
<char> copy
;
20376 /* In order not to lose the line information directory,
20377 we concatenate it to the filename when it makes sense.
20378 Note that the Dwarf3 standard says (speaking of filenames in line
20379 information): ``The directory index is ignored for file names
20380 that represent full path names''. Thus ignoring dirname in the
20381 `else' branch below isn't an issue. */
20383 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20385 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20386 filename
= copy
.get ();
20389 cu
->get_builder ()->start_subfile (filename
);
20392 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20393 buildsym_compunit constructor. */
20395 struct compunit_symtab
*
20396 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20399 gdb_assert (m_builder
== nullptr);
20401 m_builder
.reset (new struct buildsym_compunit
20402 (per_cu
->dwarf2_per_objfile
->objfile
,
20403 name
, comp_dir
, language
, low_pc
));
20405 list_in_scope
= get_builder ()->get_file_symbols ();
20407 get_builder ()->record_debugformat ("DWARF 2");
20408 get_builder ()->record_producer (producer
);
20410 processing_has_namespace_info
= false;
20412 return get_builder ()->get_compunit_symtab ();
20416 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20417 struct dwarf2_cu
*cu
)
20419 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20420 struct comp_unit_head
*cu_header
= &cu
->header
;
20422 /* NOTE drow/2003-01-30: There used to be a comment and some special
20423 code here to turn a symbol with DW_AT_external and a
20424 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20425 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20426 with some versions of binutils) where shared libraries could have
20427 relocations against symbols in their debug information - the
20428 minimal symbol would have the right address, but the debug info
20429 would not. It's no longer necessary, because we will explicitly
20430 apply relocations when we read in the debug information now. */
20432 /* A DW_AT_location attribute with no contents indicates that a
20433 variable has been optimized away. */
20434 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20436 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20440 /* Handle one degenerate form of location expression specially, to
20441 preserve GDB's previous behavior when section offsets are
20442 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20443 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20445 if (attr
->form_is_block ()
20446 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20447 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20448 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20449 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20450 && (DW_BLOCK (attr
)->size
20451 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20453 unsigned int dummy
;
20455 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20456 SET_SYMBOL_VALUE_ADDRESS
20457 (sym
, cu
->header
.read_address (objfile
->obfd
,
20458 DW_BLOCK (attr
)->data
+ 1,
20461 SET_SYMBOL_VALUE_ADDRESS
20462 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20464 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20465 fixup_symbol_section (sym
, objfile
);
20466 SET_SYMBOL_VALUE_ADDRESS
20468 SYMBOL_VALUE_ADDRESS (sym
)
20469 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20473 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20474 expression evaluator, and use LOC_COMPUTED only when necessary
20475 (i.e. when the value of a register or memory location is
20476 referenced, or a thread-local block, etc.). Then again, it might
20477 not be worthwhile. I'm assuming that it isn't unless performance
20478 or memory numbers show me otherwise. */
20480 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20482 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20483 cu
->has_loclist
= true;
20486 /* Given a pointer to a DWARF information entry, figure out if we need
20487 to make a symbol table entry for it, and if so, create a new entry
20488 and return a pointer to it.
20489 If TYPE is NULL, determine symbol type from the die, otherwise
20490 used the passed type.
20491 If SPACE is not NULL, use it to hold the new symbol. If it is
20492 NULL, allocate a new symbol on the objfile's obstack. */
20494 static struct symbol
*
20495 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20496 struct symbol
*space
)
20498 struct dwarf2_per_objfile
*dwarf2_per_objfile
20499 = cu
->per_cu
->dwarf2_per_objfile
;
20500 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20501 struct gdbarch
*gdbarch
= objfile
->arch ();
20502 struct symbol
*sym
= NULL
;
20504 struct attribute
*attr
= NULL
;
20505 struct attribute
*attr2
= NULL
;
20506 CORE_ADDR baseaddr
;
20507 struct pending
**list_to_add
= NULL
;
20509 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20511 baseaddr
= objfile
->text_section_offset ();
20513 name
= dwarf2_name (die
, cu
);
20516 const char *linkagename
;
20517 int suppress_add
= 0;
20522 sym
= allocate_symbol (objfile
);
20523 OBJSTAT (objfile
, n_syms
++);
20525 /* Cache this symbol's name and the name's demangled form (if any). */
20526 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20527 linkagename
= dwarf2_physname (name
, die
, cu
);
20528 sym
->compute_and_set_names (linkagename
, false, objfile
->per_bfd
);
20530 /* Fortran does not have mangling standard and the mangling does differ
20531 between gfortran, iFort etc. */
20532 if (cu
->language
== language_fortran
20533 && symbol_get_demangled_name (sym
) == NULL
)
20534 symbol_set_demangled_name (sym
,
20535 dwarf2_full_name (name
, die
, cu
),
20538 /* Default assumptions.
20539 Use the passed type or decode it from the die. */
20540 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20541 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20543 SYMBOL_TYPE (sym
) = type
;
20545 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20546 attr
= dwarf2_attr (die
,
20547 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20549 if (attr
!= nullptr)
20551 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20554 attr
= dwarf2_attr (die
,
20555 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20557 if (attr
!= nullptr)
20559 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20560 struct file_entry
*fe
;
20562 if (cu
->line_header
!= NULL
)
20563 fe
= cu
->line_header
->file_name_at (file_index
);
20568 complaint (_("file index out of range"));
20570 symbol_set_symtab (sym
, fe
->symtab
);
20576 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20577 if (attr
!= nullptr)
20581 addr
= attr
->value_as_address ();
20582 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20583 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20585 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20586 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20587 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20588 add_symbol_to_list (sym
, cu
->list_in_scope
);
20590 case DW_TAG_subprogram
:
20591 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20593 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20594 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20595 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20596 || cu
->language
== language_ada
20597 || cu
->language
== language_fortran
)
20599 /* Subprograms marked external are stored as a global symbol.
20600 Ada and Fortran subprograms, whether marked external or
20601 not, are always stored as a global symbol, because we want
20602 to be able to access them globally. For instance, we want
20603 to be able to break on a nested subprogram without having
20604 to specify the context. */
20605 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20609 list_to_add
= cu
->list_in_scope
;
20612 case DW_TAG_inlined_subroutine
:
20613 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20615 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20616 SYMBOL_INLINED (sym
) = 1;
20617 list_to_add
= cu
->list_in_scope
;
20619 case DW_TAG_template_value_param
:
20621 /* Fall through. */
20622 case DW_TAG_constant
:
20623 case DW_TAG_variable
:
20624 case DW_TAG_member
:
20625 /* Compilation with minimal debug info may result in
20626 variables with missing type entries. Change the
20627 misleading `void' type to something sensible. */
20628 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
20629 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20631 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20632 /* In the case of DW_TAG_member, we should only be called for
20633 static const members. */
20634 if (die
->tag
== DW_TAG_member
)
20636 /* dwarf2_add_field uses die_is_declaration,
20637 so we do the same. */
20638 gdb_assert (die_is_declaration (die
, cu
));
20641 if (attr
!= nullptr)
20643 dwarf2_const_value (attr
, sym
, cu
);
20644 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20647 if (attr2
&& (DW_UNSND (attr2
) != 0))
20648 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20650 list_to_add
= cu
->list_in_scope
;
20654 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20655 if (attr
!= nullptr)
20657 var_decode_location (attr
, sym
, cu
);
20658 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20660 /* Fortran explicitly imports any global symbols to the local
20661 scope by DW_TAG_common_block. */
20662 if (cu
->language
== language_fortran
&& die
->parent
20663 && die
->parent
->tag
== DW_TAG_common_block
)
20666 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20667 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20668 && !dwarf2_per_objfile
->has_section_at_zero
)
20670 /* When a static variable is eliminated by the linker,
20671 the corresponding debug information is not stripped
20672 out, but the variable address is set to null;
20673 do not add such variables into symbol table. */
20675 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20677 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20678 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20679 && dwarf2_per_objfile
->can_copy
)
20681 /* A global static variable might be subject to
20682 copy relocation. We first check for a local
20683 minsym, though, because maybe the symbol was
20684 marked hidden, in which case this would not
20686 bound_minimal_symbol found
20687 = (lookup_minimal_symbol_linkage
20688 (sym
->linkage_name (), objfile
));
20689 if (found
.minsym
!= nullptr)
20690 sym
->maybe_copied
= 1;
20693 /* A variable with DW_AT_external is never static,
20694 but it may be block-scoped. */
20696 = ((cu
->list_in_scope
20697 == cu
->get_builder ()->get_file_symbols ())
20698 ? cu
->get_builder ()->get_global_symbols ()
20699 : cu
->list_in_scope
);
20702 list_to_add
= cu
->list_in_scope
;
20706 /* We do not know the address of this symbol.
20707 If it is an external symbol and we have type information
20708 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20709 The address of the variable will then be determined from
20710 the minimal symbol table whenever the variable is
20712 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20714 /* Fortran explicitly imports any global symbols to the local
20715 scope by DW_TAG_common_block. */
20716 if (cu
->language
== language_fortran
&& die
->parent
20717 && die
->parent
->tag
== DW_TAG_common_block
)
20719 /* SYMBOL_CLASS doesn't matter here because
20720 read_common_block is going to reset it. */
20722 list_to_add
= cu
->list_in_scope
;
20724 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20725 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20727 /* A variable with DW_AT_external is never static, but it
20728 may be block-scoped. */
20730 = ((cu
->list_in_scope
20731 == cu
->get_builder ()->get_file_symbols ())
20732 ? cu
->get_builder ()->get_global_symbols ()
20733 : cu
->list_in_scope
);
20735 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20737 else if (!die_is_declaration (die
, cu
))
20739 /* Use the default LOC_OPTIMIZED_OUT class. */
20740 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20742 list_to_add
= cu
->list_in_scope
;
20746 case DW_TAG_formal_parameter
:
20748 /* If we are inside a function, mark this as an argument. If
20749 not, we might be looking at an argument to an inlined function
20750 when we do not have enough information to show inlined frames;
20751 pretend it's a local variable in that case so that the user can
20753 struct context_stack
*curr
20754 = cu
->get_builder ()->get_current_context_stack ();
20755 if (curr
!= nullptr && curr
->name
!= nullptr)
20756 SYMBOL_IS_ARGUMENT (sym
) = 1;
20757 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20758 if (attr
!= nullptr)
20760 var_decode_location (attr
, sym
, cu
);
20762 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20763 if (attr
!= nullptr)
20765 dwarf2_const_value (attr
, sym
, cu
);
20768 list_to_add
= cu
->list_in_scope
;
20771 case DW_TAG_unspecified_parameters
:
20772 /* From varargs functions; gdb doesn't seem to have any
20773 interest in this information, so just ignore it for now.
20776 case DW_TAG_template_type_param
:
20778 /* Fall through. */
20779 case DW_TAG_class_type
:
20780 case DW_TAG_interface_type
:
20781 case DW_TAG_structure_type
:
20782 case DW_TAG_union_type
:
20783 case DW_TAG_set_type
:
20784 case DW_TAG_enumeration_type
:
20785 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20786 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20789 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20790 really ever be static objects: otherwise, if you try
20791 to, say, break of a class's method and you're in a file
20792 which doesn't mention that class, it won't work unless
20793 the check for all static symbols in lookup_symbol_aux
20794 saves you. See the OtherFileClass tests in
20795 gdb.c++/namespace.exp. */
20799 buildsym_compunit
*builder
= cu
->get_builder ();
20801 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20802 && cu
->language
== language_cplus
20803 ? builder
->get_global_symbols ()
20804 : cu
->list_in_scope
);
20806 /* The semantics of C++ state that "struct foo {
20807 ... }" also defines a typedef for "foo". */
20808 if (cu
->language
== language_cplus
20809 || cu
->language
== language_ada
20810 || cu
->language
== language_d
20811 || cu
->language
== language_rust
)
20813 /* The symbol's name is already allocated along
20814 with this objfile, so we don't need to
20815 duplicate it for the type. */
20816 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
20817 TYPE_NAME (SYMBOL_TYPE (sym
)) = sym
->search_name ();
20822 case DW_TAG_typedef
:
20823 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20824 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20825 list_to_add
= cu
->list_in_scope
;
20827 case DW_TAG_base_type
:
20828 case DW_TAG_subrange_type
:
20829 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20830 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20831 list_to_add
= cu
->list_in_scope
;
20833 case DW_TAG_enumerator
:
20834 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20835 if (attr
!= nullptr)
20837 dwarf2_const_value (attr
, sym
, cu
);
20840 /* NOTE: carlton/2003-11-10: See comment above in the
20841 DW_TAG_class_type, etc. block. */
20844 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
20845 && cu
->language
== language_cplus
20846 ? cu
->get_builder ()->get_global_symbols ()
20847 : cu
->list_in_scope
);
20850 case DW_TAG_imported_declaration
:
20851 case DW_TAG_namespace
:
20852 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20853 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20855 case DW_TAG_module
:
20856 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20857 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
20858 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20860 case DW_TAG_common_block
:
20861 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
20862 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
20863 add_symbol_to_list (sym
, cu
->list_in_scope
);
20866 /* Not a tag we recognize. Hopefully we aren't processing
20867 trash data, but since we must specifically ignore things
20868 we don't recognize, there is nothing else we should do at
20870 complaint (_("unsupported tag: '%s'"),
20871 dwarf_tag_name (die
->tag
));
20877 sym
->hash_next
= objfile
->template_symbols
;
20878 objfile
->template_symbols
= sym
;
20879 list_to_add
= NULL
;
20882 if (list_to_add
!= NULL
)
20883 add_symbol_to_list (sym
, list_to_add
);
20885 /* For the benefit of old versions of GCC, check for anonymous
20886 namespaces based on the demangled name. */
20887 if (!cu
->processing_has_namespace_info
20888 && cu
->language
== language_cplus
)
20889 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
20894 /* Given an attr with a DW_FORM_dataN value in host byte order,
20895 zero-extend it as appropriate for the symbol's type. The DWARF
20896 standard (v4) is not entirely clear about the meaning of using
20897 DW_FORM_dataN for a constant with a signed type, where the type is
20898 wider than the data. The conclusion of a discussion on the DWARF
20899 list was that this is unspecified. We choose to always zero-extend
20900 because that is the interpretation long in use by GCC. */
20903 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20904 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20906 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20907 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20908 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20909 LONGEST l
= DW_UNSND (attr
);
20911 if (bits
< sizeof (*value
) * 8)
20913 l
&= ((LONGEST
) 1 << bits
) - 1;
20916 else if (bits
== sizeof (*value
) * 8)
20920 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20921 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20928 /* Read a constant value from an attribute. Either set *VALUE, or if
20929 the value does not fit in *VALUE, set *BYTES - either already
20930 allocated on the objfile obstack, or newly allocated on OBSTACK,
20931 or, set *BATON, if we translated the constant to a location
20935 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20936 const char *name
, struct obstack
*obstack
,
20937 struct dwarf2_cu
*cu
,
20938 LONGEST
*value
, const gdb_byte
**bytes
,
20939 struct dwarf2_locexpr_baton
**baton
)
20941 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20942 struct comp_unit_head
*cu_header
= &cu
->header
;
20943 struct dwarf_block
*blk
;
20944 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20945 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20951 switch (attr
->form
)
20954 case DW_FORM_addrx
:
20955 case DW_FORM_GNU_addr_index
:
20959 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
20960 dwarf2_const_value_length_mismatch_complaint (name
,
20961 cu_header
->addr_size
,
20962 TYPE_LENGTH (type
));
20963 /* Symbols of this form are reasonably rare, so we just
20964 piggyback on the existing location code rather than writing
20965 a new implementation of symbol_computed_ops. */
20966 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
20967 (*baton
)->per_cu
= cu
->per_cu
;
20968 gdb_assert ((*baton
)->per_cu
);
20970 (*baton
)->size
= 2 + cu_header
->addr_size
;
20971 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
20972 (*baton
)->data
= data
;
20974 data
[0] = DW_OP_addr
;
20975 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
20976 byte_order
, DW_ADDR (attr
));
20977 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
20980 case DW_FORM_string
:
20983 case DW_FORM_GNU_str_index
:
20984 case DW_FORM_GNU_strp_alt
:
20985 /* DW_STRING is already allocated on the objfile obstack, point
20987 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
20989 case DW_FORM_block1
:
20990 case DW_FORM_block2
:
20991 case DW_FORM_block4
:
20992 case DW_FORM_block
:
20993 case DW_FORM_exprloc
:
20994 case DW_FORM_data16
:
20995 blk
= DW_BLOCK (attr
);
20996 if (TYPE_LENGTH (type
) != blk
->size
)
20997 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
20998 TYPE_LENGTH (type
));
20999 *bytes
= blk
->data
;
21002 /* The DW_AT_const_value attributes are supposed to carry the
21003 symbol's value "represented as it would be on the target
21004 architecture." By the time we get here, it's already been
21005 converted to host endianness, so we just need to sign- or
21006 zero-extend it as appropriate. */
21007 case DW_FORM_data1
:
21008 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21010 case DW_FORM_data2
:
21011 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21013 case DW_FORM_data4
:
21014 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21016 case DW_FORM_data8
:
21017 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21020 case DW_FORM_sdata
:
21021 case DW_FORM_implicit_const
:
21022 *value
= DW_SND (attr
);
21025 case DW_FORM_udata
:
21026 *value
= DW_UNSND (attr
);
21030 complaint (_("unsupported const value attribute form: '%s'"),
21031 dwarf_form_name (attr
->form
));
21038 /* Copy constant value from an attribute to a symbol. */
21041 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21042 struct dwarf2_cu
*cu
)
21044 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21046 const gdb_byte
*bytes
;
21047 struct dwarf2_locexpr_baton
*baton
;
21049 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21050 sym
->print_name (),
21051 &objfile
->objfile_obstack
, cu
,
21052 &value
, &bytes
, &baton
);
21056 SYMBOL_LOCATION_BATON (sym
) = baton
;
21057 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21059 else if (bytes
!= NULL
)
21061 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21062 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21066 SYMBOL_VALUE (sym
) = value
;
21067 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21071 /* Return the type of the die in question using its DW_AT_type attribute. */
21073 static struct type
*
21074 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21076 struct attribute
*type_attr
;
21078 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21081 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21082 /* A missing DW_AT_type represents a void type. */
21083 return objfile_type (objfile
)->builtin_void
;
21086 return lookup_die_type (die
, type_attr
, cu
);
21089 /* True iff CU's producer generates GNAT Ada auxiliary information
21090 that allows to find parallel types through that information instead
21091 of having to do expensive parallel lookups by type name. */
21094 need_gnat_info (struct dwarf2_cu
*cu
)
21096 /* Assume that the Ada compiler was GNAT, which always produces
21097 the auxiliary information. */
21098 return (cu
->language
== language_ada
);
21101 /* Return the auxiliary type of the die in question using its
21102 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21103 attribute is not present. */
21105 static struct type
*
21106 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21108 struct attribute
*type_attr
;
21110 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21114 return lookup_die_type (die
, type_attr
, cu
);
21117 /* If DIE has a descriptive_type attribute, then set the TYPE's
21118 descriptive type accordingly. */
21121 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21122 struct dwarf2_cu
*cu
)
21124 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21126 if (descriptive_type
)
21128 ALLOCATE_GNAT_AUX_TYPE (type
);
21129 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21133 /* Return the containing type of the die in question using its
21134 DW_AT_containing_type attribute. */
21136 static struct type
*
21137 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21139 struct attribute
*type_attr
;
21140 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21142 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21144 error (_("Dwarf Error: Problem turning containing type into gdb type "
21145 "[in module %s]"), objfile_name (objfile
));
21147 return lookup_die_type (die
, type_attr
, cu
);
21150 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21152 static struct type
*
21153 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21155 struct dwarf2_per_objfile
*dwarf2_per_objfile
21156 = cu
->per_cu
->dwarf2_per_objfile
;
21157 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21160 std::string message
21161 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21162 objfile_name (objfile
),
21163 sect_offset_str (cu
->header
.sect_off
),
21164 sect_offset_str (die
->sect_off
));
21165 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21167 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21170 /* Look up the type of DIE in CU using its type attribute ATTR.
21171 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21172 DW_AT_containing_type.
21173 If there is no type substitute an error marker. */
21175 static struct type
*
21176 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21177 struct dwarf2_cu
*cu
)
21179 struct dwarf2_per_objfile
*dwarf2_per_objfile
21180 = cu
->per_cu
->dwarf2_per_objfile
;
21181 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21182 struct type
*this_type
;
21184 gdb_assert (attr
->name
== DW_AT_type
21185 || attr
->name
== DW_AT_GNAT_descriptive_type
21186 || attr
->name
== DW_AT_containing_type
);
21188 /* First see if we have it cached. */
21190 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21192 struct dwarf2_per_cu_data
*per_cu
;
21193 sect_offset sect_off
= attr
->get_ref_die_offset ();
21195 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21196 dwarf2_per_objfile
);
21197 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21199 else if (attr
->form_is_ref ())
21201 sect_offset sect_off
= attr
->get_ref_die_offset ();
21203 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21205 else if (attr
->form
== DW_FORM_ref_sig8
)
21207 ULONGEST signature
= DW_SIGNATURE (attr
);
21209 return get_signatured_type (die
, signature
, cu
);
21213 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21214 " at %s [in module %s]"),
21215 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21216 objfile_name (objfile
));
21217 return build_error_marker_type (cu
, die
);
21220 /* If not cached we need to read it in. */
21222 if (this_type
== NULL
)
21224 struct die_info
*type_die
= NULL
;
21225 struct dwarf2_cu
*type_cu
= cu
;
21227 if (attr
->form_is_ref ())
21228 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21229 if (type_die
== NULL
)
21230 return build_error_marker_type (cu
, die
);
21231 /* If we find the type now, it's probably because the type came
21232 from an inter-CU reference and the type's CU got expanded before
21234 this_type
= read_type_die (type_die
, type_cu
);
21237 /* If we still don't have a type use an error marker. */
21239 if (this_type
== NULL
)
21240 return build_error_marker_type (cu
, die
);
21245 /* Return the type in DIE, CU.
21246 Returns NULL for invalid types.
21248 This first does a lookup in die_type_hash,
21249 and only reads the die in if necessary.
21251 NOTE: This can be called when reading in partial or full symbols. */
21253 static struct type
*
21254 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21256 struct type
*this_type
;
21258 this_type
= get_die_type (die
, cu
);
21262 return read_type_die_1 (die
, cu
);
21265 /* Read the type in DIE, CU.
21266 Returns NULL for invalid types. */
21268 static struct type
*
21269 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21271 struct type
*this_type
= NULL
;
21275 case DW_TAG_class_type
:
21276 case DW_TAG_interface_type
:
21277 case DW_TAG_structure_type
:
21278 case DW_TAG_union_type
:
21279 this_type
= read_structure_type (die
, cu
);
21281 case DW_TAG_enumeration_type
:
21282 this_type
= read_enumeration_type (die
, cu
);
21284 case DW_TAG_subprogram
:
21285 case DW_TAG_subroutine_type
:
21286 case DW_TAG_inlined_subroutine
:
21287 this_type
= read_subroutine_type (die
, cu
);
21289 case DW_TAG_array_type
:
21290 this_type
= read_array_type (die
, cu
);
21292 case DW_TAG_set_type
:
21293 this_type
= read_set_type (die
, cu
);
21295 case DW_TAG_pointer_type
:
21296 this_type
= read_tag_pointer_type (die
, cu
);
21298 case DW_TAG_ptr_to_member_type
:
21299 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21301 case DW_TAG_reference_type
:
21302 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21304 case DW_TAG_rvalue_reference_type
:
21305 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21307 case DW_TAG_const_type
:
21308 this_type
= read_tag_const_type (die
, cu
);
21310 case DW_TAG_volatile_type
:
21311 this_type
= read_tag_volatile_type (die
, cu
);
21313 case DW_TAG_restrict_type
:
21314 this_type
= read_tag_restrict_type (die
, cu
);
21316 case DW_TAG_string_type
:
21317 this_type
= read_tag_string_type (die
, cu
);
21319 case DW_TAG_typedef
:
21320 this_type
= read_typedef (die
, cu
);
21322 case DW_TAG_subrange_type
:
21323 this_type
= read_subrange_type (die
, cu
);
21325 case DW_TAG_base_type
:
21326 this_type
= read_base_type (die
, cu
);
21328 case DW_TAG_unspecified_type
:
21329 this_type
= read_unspecified_type (die
, cu
);
21331 case DW_TAG_namespace
:
21332 this_type
= read_namespace_type (die
, cu
);
21334 case DW_TAG_module
:
21335 this_type
= read_module_type (die
, cu
);
21337 case DW_TAG_atomic_type
:
21338 this_type
= read_tag_atomic_type (die
, cu
);
21341 complaint (_("unexpected tag in read_type_die: '%s'"),
21342 dwarf_tag_name (die
->tag
));
21349 /* See if we can figure out if the class lives in a namespace. We do
21350 this by looking for a member function; its demangled name will
21351 contain namespace info, if there is any.
21352 Return the computed name or NULL.
21353 Space for the result is allocated on the objfile's obstack.
21354 This is the full-die version of guess_partial_die_structure_name.
21355 In this case we know DIE has no useful parent. */
21357 static const char *
21358 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21360 struct die_info
*spec_die
;
21361 struct dwarf2_cu
*spec_cu
;
21362 struct die_info
*child
;
21363 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21366 spec_die
= die_specification (die
, &spec_cu
);
21367 if (spec_die
!= NULL
)
21373 for (child
= die
->child
;
21375 child
= child
->sibling
)
21377 if (child
->tag
== DW_TAG_subprogram
)
21379 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21381 if (linkage_name
!= NULL
)
21383 gdb::unique_xmalloc_ptr
<char> actual_name
21384 (language_class_name_from_physname (cu
->language_defn
,
21386 const char *name
= NULL
;
21388 if (actual_name
!= NULL
)
21390 const char *die_name
= dwarf2_name (die
, cu
);
21392 if (die_name
!= NULL
21393 && strcmp (die_name
, actual_name
.get ()) != 0)
21395 /* Strip off the class name from the full name.
21396 We want the prefix. */
21397 int die_name_len
= strlen (die_name
);
21398 int actual_name_len
= strlen (actual_name
.get ());
21399 const char *ptr
= actual_name
.get ();
21401 /* Test for '::' as a sanity check. */
21402 if (actual_name_len
> die_name_len
+ 2
21403 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21404 name
= obstack_strndup (
21405 &objfile
->per_bfd
->storage_obstack
,
21406 ptr
, actual_name_len
- die_name_len
- 2);
21417 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21418 prefix part in such case. See
21419 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21421 static const char *
21422 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21424 struct attribute
*attr
;
21427 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21428 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21431 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21434 attr
= dw2_linkage_name_attr (die
, cu
);
21435 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21438 /* dwarf2_name had to be already called. */
21439 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21441 /* Strip the base name, keep any leading namespaces/classes. */
21442 base
= strrchr (DW_STRING (attr
), ':');
21443 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21446 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21447 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21449 &base
[-1] - DW_STRING (attr
));
21452 /* Return the name of the namespace/class that DIE is defined within,
21453 or "" if we can't tell. The caller should not xfree the result.
21455 For example, if we're within the method foo() in the following
21465 then determine_prefix on foo's die will return "N::C". */
21467 static const char *
21468 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21470 struct dwarf2_per_objfile
*dwarf2_per_objfile
21471 = cu
->per_cu
->dwarf2_per_objfile
;
21472 struct die_info
*parent
, *spec_die
;
21473 struct dwarf2_cu
*spec_cu
;
21474 struct type
*parent_type
;
21475 const char *retval
;
21477 if (cu
->language
!= language_cplus
21478 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21479 && cu
->language
!= language_rust
)
21482 retval
= anonymous_struct_prefix (die
, cu
);
21486 /* We have to be careful in the presence of DW_AT_specification.
21487 For example, with GCC 3.4, given the code
21491 // Definition of N::foo.
21495 then we'll have a tree of DIEs like this:
21497 1: DW_TAG_compile_unit
21498 2: DW_TAG_namespace // N
21499 3: DW_TAG_subprogram // declaration of N::foo
21500 4: DW_TAG_subprogram // definition of N::foo
21501 DW_AT_specification // refers to die #3
21503 Thus, when processing die #4, we have to pretend that we're in
21504 the context of its DW_AT_specification, namely the contex of die
21507 spec_die
= die_specification (die
, &spec_cu
);
21508 if (spec_die
== NULL
)
21509 parent
= die
->parent
;
21512 parent
= spec_die
->parent
;
21516 if (parent
== NULL
)
21518 else if (parent
->building_fullname
)
21521 const char *parent_name
;
21523 /* It has been seen on RealView 2.2 built binaries,
21524 DW_TAG_template_type_param types actually _defined_ as
21525 children of the parent class:
21528 template class <class Enum> Class{};
21529 Class<enum E> class_e;
21531 1: DW_TAG_class_type (Class)
21532 2: DW_TAG_enumeration_type (E)
21533 3: DW_TAG_enumerator (enum1:0)
21534 3: DW_TAG_enumerator (enum2:1)
21536 2: DW_TAG_template_type_param
21537 DW_AT_type DW_FORM_ref_udata (E)
21539 Besides being broken debug info, it can put GDB into an
21540 infinite loop. Consider:
21542 When we're building the full name for Class<E>, we'll start
21543 at Class, and go look over its template type parameters,
21544 finding E. We'll then try to build the full name of E, and
21545 reach here. We're now trying to build the full name of E,
21546 and look over the parent DIE for containing scope. In the
21547 broken case, if we followed the parent DIE of E, we'd again
21548 find Class, and once again go look at its template type
21549 arguments, etc., etc. Simply don't consider such parent die
21550 as source-level parent of this die (it can't be, the language
21551 doesn't allow it), and break the loop here. */
21552 name
= dwarf2_name (die
, cu
);
21553 parent_name
= dwarf2_name (parent
, cu
);
21554 complaint (_("template param type '%s' defined within parent '%s'"),
21555 name
? name
: "<unknown>",
21556 parent_name
? parent_name
: "<unknown>");
21560 switch (parent
->tag
)
21562 case DW_TAG_namespace
:
21563 parent_type
= read_type_die (parent
, cu
);
21564 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21565 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21566 Work around this problem here. */
21567 if (cu
->language
== language_cplus
21568 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
21570 /* We give a name to even anonymous namespaces. */
21571 return TYPE_NAME (parent_type
);
21572 case DW_TAG_class_type
:
21573 case DW_TAG_interface_type
:
21574 case DW_TAG_structure_type
:
21575 case DW_TAG_union_type
:
21576 case DW_TAG_module
:
21577 parent_type
= read_type_die (parent
, cu
);
21578 if (TYPE_NAME (parent_type
) != NULL
)
21579 return TYPE_NAME (parent_type
);
21581 /* An anonymous structure is only allowed non-static data
21582 members; no typedefs, no member functions, et cetera.
21583 So it does not need a prefix. */
21585 case DW_TAG_compile_unit
:
21586 case DW_TAG_partial_unit
:
21587 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21588 if (cu
->language
== language_cplus
21589 && !dwarf2_per_objfile
->types
.empty ()
21590 && die
->child
!= NULL
21591 && (die
->tag
== DW_TAG_class_type
21592 || die
->tag
== DW_TAG_structure_type
21593 || die
->tag
== DW_TAG_union_type
))
21595 const char *name
= guess_full_die_structure_name (die
, cu
);
21600 case DW_TAG_subprogram
:
21601 /* Nested subroutines in Fortran get a prefix with the name
21602 of the parent's subroutine. */
21603 if (cu
->language
== language_fortran
)
21605 if ((die
->tag
== DW_TAG_subprogram
)
21606 && (dwarf2_name (parent
, cu
) != NULL
))
21607 return dwarf2_name (parent
, cu
);
21609 return determine_prefix (parent
, cu
);
21610 case DW_TAG_enumeration_type
:
21611 parent_type
= read_type_die (parent
, cu
);
21612 if (TYPE_DECLARED_CLASS (parent_type
))
21614 if (TYPE_NAME (parent_type
) != NULL
)
21615 return TYPE_NAME (parent_type
);
21618 /* Fall through. */
21620 return determine_prefix (parent
, cu
);
21624 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21625 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21626 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21627 an obconcat, otherwise allocate storage for the result. The CU argument is
21628 used to determine the language and hence, the appropriate separator. */
21630 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21633 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21634 int physname
, struct dwarf2_cu
*cu
)
21636 const char *lead
= "";
21639 if (suffix
== NULL
|| suffix
[0] == '\0'
21640 || prefix
== NULL
|| prefix
[0] == '\0')
21642 else if (cu
->language
== language_d
)
21644 /* For D, the 'main' function could be defined in any module, but it
21645 should never be prefixed. */
21646 if (strcmp (suffix
, "D main") == 0)
21654 else if (cu
->language
== language_fortran
&& physname
)
21656 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21657 DW_AT_MIPS_linkage_name is preferred and used instead. */
21665 if (prefix
== NULL
)
21667 if (suffix
== NULL
)
21674 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21676 strcpy (retval
, lead
);
21677 strcat (retval
, prefix
);
21678 strcat (retval
, sep
);
21679 strcat (retval
, suffix
);
21684 /* We have an obstack. */
21685 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21689 /* Get name of a die, return NULL if not found. */
21691 static const char *
21692 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21693 struct objfile
*objfile
)
21695 if (name
&& cu
->language
== language_cplus
)
21697 std::string canon_name
= cp_canonicalize_string (name
);
21699 if (!canon_name
.empty ())
21701 if (canon_name
!= name
)
21702 name
= objfile
->intern (canon_name
);
21709 /* Get name of a die, return NULL if not found.
21710 Anonymous namespaces are converted to their magic string. */
21712 static const char *
21713 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21715 struct attribute
*attr
;
21716 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21718 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21719 if ((!attr
|| !DW_STRING (attr
))
21720 && die
->tag
!= DW_TAG_namespace
21721 && die
->tag
!= DW_TAG_class_type
21722 && die
->tag
!= DW_TAG_interface_type
21723 && die
->tag
!= DW_TAG_structure_type
21724 && die
->tag
!= DW_TAG_union_type
)
21729 case DW_TAG_compile_unit
:
21730 case DW_TAG_partial_unit
:
21731 /* Compilation units have a DW_AT_name that is a filename, not
21732 a source language identifier. */
21733 case DW_TAG_enumeration_type
:
21734 case DW_TAG_enumerator
:
21735 /* These tags always have simple identifiers already; no need
21736 to canonicalize them. */
21737 return DW_STRING (attr
);
21739 case DW_TAG_namespace
:
21740 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21741 return DW_STRING (attr
);
21742 return CP_ANONYMOUS_NAMESPACE_STR
;
21744 case DW_TAG_class_type
:
21745 case DW_TAG_interface_type
:
21746 case DW_TAG_structure_type
:
21747 case DW_TAG_union_type
:
21748 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21749 structures or unions. These were of the form "._%d" in GCC 4.1,
21750 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21751 and GCC 4.4. We work around this problem by ignoring these. */
21752 if (attr
&& DW_STRING (attr
)
21753 && (startswith (DW_STRING (attr
), "._")
21754 || startswith (DW_STRING (attr
), "<anonymous")))
21757 /* GCC might emit a nameless typedef that has a linkage name. See
21758 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21759 if (!attr
|| DW_STRING (attr
) == NULL
)
21761 attr
= dw2_linkage_name_attr (die
, cu
);
21762 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21765 /* Avoid demangling DW_STRING (attr) the second time on a second
21766 call for the same DIE. */
21767 if (!DW_STRING_IS_CANONICAL (attr
))
21769 gdb::unique_xmalloc_ptr
<char> demangled
21770 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21771 if (demangled
== nullptr)
21774 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21775 DW_STRING_IS_CANONICAL (attr
) = 1;
21778 /* Strip any leading namespaces/classes, keep only the base name.
21779 DW_AT_name for named DIEs does not contain the prefixes. */
21780 const char *base
= strrchr (DW_STRING (attr
), ':');
21781 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21784 return DW_STRING (attr
);
21792 if (!DW_STRING_IS_CANONICAL (attr
))
21794 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21796 DW_STRING_IS_CANONICAL (attr
) = 1;
21798 return DW_STRING (attr
);
21801 /* Return the die that this die in an extension of, or NULL if there
21802 is none. *EXT_CU is the CU containing DIE on input, and the CU
21803 containing the return value on output. */
21805 static struct die_info
*
21806 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21808 struct attribute
*attr
;
21810 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21814 return follow_die_ref (die
, attr
, ext_cu
);
21818 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21822 print_spaces (indent
, f
);
21823 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21824 dwarf_tag_name (die
->tag
), die
->abbrev
,
21825 sect_offset_str (die
->sect_off
));
21827 if (die
->parent
!= NULL
)
21829 print_spaces (indent
, f
);
21830 fprintf_unfiltered (f
, " parent at offset: %s\n",
21831 sect_offset_str (die
->parent
->sect_off
));
21834 print_spaces (indent
, f
);
21835 fprintf_unfiltered (f
, " has children: %s\n",
21836 dwarf_bool_name (die
->child
!= NULL
));
21838 print_spaces (indent
, f
);
21839 fprintf_unfiltered (f
, " attributes:\n");
21841 for (i
= 0; i
< die
->num_attrs
; ++i
)
21843 print_spaces (indent
, f
);
21844 fprintf_unfiltered (f
, " %s (%s) ",
21845 dwarf_attr_name (die
->attrs
[i
].name
),
21846 dwarf_form_name (die
->attrs
[i
].form
));
21848 switch (die
->attrs
[i
].form
)
21851 case DW_FORM_addrx
:
21852 case DW_FORM_GNU_addr_index
:
21853 fprintf_unfiltered (f
, "address: ");
21854 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21856 case DW_FORM_block2
:
21857 case DW_FORM_block4
:
21858 case DW_FORM_block
:
21859 case DW_FORM_block1
:
21860 fprintf_unfiltered (f
, "block: size %s",
21861 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21863 case DW_FORM_exprloc
:
21864 fprintf_unfiltered (f
, "expression: size %s",
21865 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21867 case DW_FORM_data16
:
21868 fprintf_unfiltered (f
, "constant of 16 bytes");
21870 case DW_FORM_ref_addr
:
21871 fprintf_unfiltered (f
, "ref address: ");
21872 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21874 case DW_FORM_GNU_ref_alt
:
21875 fprintf_unfiltered (f
, "alt ref address: ");
21876 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21882 case DW_FORM_ref_udata
:
21883 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21884 (long) (DW_UNSND (&die
->attrs
[i
])));
21886 case DW_FORM_data1
:
21887 case DW_FORM_data2
:
21888 case DW_FORM_data4
:
21889 case DW_FORM_data8
:
21890 case DW_FORM_udata
:
21891 case DW_FORM_sdata
:
21892 fprintf_unfiltered (f
, "constant: %s",
21893 pulongest (DW_UNSND (&die
->attrs
[i
])));
21895 case DW_FORM_sec_offset
:
21896 fprintf_unfiltered (f
, "section offset: %s",
21897 pulongest (DW_UNSND (&die
->attrs
[i
])));
21899 case DW_FORM_ref_sig8
:
21900 fprintf_unfiltered (f
, "signature: %s",
21901 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21903 case DW_FORM_string
:
21905 case DW_FORM_line_strp
:
21907 case DW_FORM_GNU_str_index
:
21908 case DW_FORM_GNU_strp_alt
:
21909 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21910 DW_STRING (&die
->attrs
[i
])
21911 ? DW_STRING (&die
->attrs
[i
]) : "",
21912 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21915 if (DW_UNSND (&die
->attrs
[i
]))
21916 fprintf_unfiltered (f
, "flag: TRUE");
21918 fprintf_unfiltered (f
, "flag: FALSE");
21920 case DW_FORM_flag_present
:
21921 fprintf_unfiltered (f
, "flag: TRUE");
21923 case DW_FORM_indirect
:
21924 /* The reader will have reduced the indirect form to
21925 the "base form" so this form should not occur. */
21926 fprintf_unfiltered (f
,
21927 "unexpected attribute form: DW_FORM_indirect");
21929 case DW_FORM_implicit_const
:
21930 fprintf_unfiltered (f
, "constant: %s",
21931 plongest (DW_SND (&die
->attrs
[i
])));
21934 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21935 die
->attrs
[i
].form
);
21938 fprintf_unfiltered (f
, "\n");
21943 dump_die_for_error (struct die_info
*die
)
21945 dump_die_shallow (gdb_stderr
, 0, die
);
21949 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21951 int indent
= level
* 4;
21953 gdb_assert (die
!= NULL
);
21955 if (level
>= max_level
)
21958 dump_die_shallow (f
, indent
, die
);
21960 if (die
->child
!= NULL
)
21962 print_spaces (indent
, f
);
21963 fprintf_unfiltered (f
, " Children:");
21964 if (level
+ 1 < max_level
)
21966 fprintf_unfiltered (f
, "\n");
21967 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
21971 fprintf_unfiltered (f
,
21972 " [not printed, max nesting level reached]\n");
21976 if (die
->sibling
!= NULL
&& level
> 0)
21978 dump_die_1 (f
, level
, max_level
, die
->sibling
);
21982 /* This is called from the pdie macro in gdbinit.in.
21983 It's not static so gcc will keep a copy callable from gdb. */
21986 dump_die (struct die_info
*die
, int max_level
)
21988 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
21992 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
21996 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
21997 to_underlying (die
->sect_off
),
22003 /* Follow reference or signature attribute ATTR of SRC_DIE.
22004 On entry *REF_CU is the CU of SRC_DIE.
22005 On exit *REF_CU is the CU of the result. */
22007 static struct die_info
*
22008 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22009 struct dwarf2_cu
**ref_cu
)
22011 struct die_info
*die
;
22013 if (attr
->form_is_ref ())
22014 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22015 else if (attr
->form
== DW_FORM_ref_sig8
)
22016 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22019 dump_die_for_error (src_die
);
22020 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22021 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22027 /* Follow reference OFFSET.
22028 On entry *REF_CU is the CU of the source die referencing OFFSET.
22029 On exit *REF_CU is the CU of the result.
22030 Returns NULL if OFFSET is invalid. */
22032 static struct die_info
*
22033 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22034 struct dwarf2_cu
**ref_cu
)
22036 struct die_info temp_die
;
22037 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22038 struct dwarf2_per_objfile
*dwarf2_per_objfile
22039 = cu
->per_cu
->dwarf2_per_objfile
;
22041 gdb_assert (cu
->per_cu
!= NULL
);
22045 if (cu
->per_cu
->is_debug_types
)
22047 /* .debug_types CUs cannot reference anything outside their CU.
22048 If they need to, they have to reference a signatured type via
22049 DW_FORM_ref_sig8. */
22050 if (!cu
->header
.offset_in_cu_p (sect_off
))
22053 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22054 || !cu
->header
.offset_in_cu_p (sect_off
))
22056 struct dwarf2_per_cu_data
*per_cu
;
22058 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22059 dwarf2_per_objfile
);
22061 /* If necessary, add it to the queue and load its DIEs. */
22062 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22063 load_full_comp_unit (per_cu
, false, cu
->language
);
22065 target_cu
= per_cu
->cu
;
22067 else if (cu
->dies
== NULL
)
22069 /* We're loading full DIEs during partial symbol reading. */
22070 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22071 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22074 *ref_cu
= target_cu
;
22075 temp_die
.sect_off
= sect_off
;
22077 if (target_cu
!= cu
)
22078 target_cu
->ancestor
= cu
;
22080 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22082 to_underlying (sect_off
));
22085 /* Follow reference attribute ATTR of SRC_DIE.
22086 On entry *REF_CU is the CU of SRC_DIE.
22087 On exit *REF_CU is the CU of the result. */
22089 static struct die_info
*
22090 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22091 struct dwarf2_cu
**ref_cu
)
22093 sect_offset sect_off
= attr
->get_ref_die_offset ();
22094 struct dwarf2_cu
*cu
= *ref_cu
;
22095 struct die_info
*die
;
22097 die
= follow_die_offset (sect_off
,
22098 (attr
->form
== DW_FORM_GNU_ref_alt
22099 || cu
->per_cu
->is_dwz
),
22102 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22103 "at %s [in module %s]"),
22104 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22105 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22112 struct dwarf2_locexpr_baton
22113 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22114 dwarf2_per_cu_data
*per_cu
,
22115 CORE_ADDR (*get_frame_pc
) (void *baton
),
22116 void *baton
, bool resolve_abstract_p
)
22118 struct dwarf2_cu
*cu
;
22119 struct die_info
*die
;
22120 struct attribute
*attr
;
22121 struct dwarf2_locexpr_baton retval
;
22122 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22123 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22125 if (per_cu
->cu
== NULL
)
22126 load_cu (per_cu
, false);
22130 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22131 Instead just throw an error, not much else we can do. */
22132 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22133 sect_offset_str (sect_off
), objfile_name (objfile
));
22136 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22138 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22139 sect_offset_str (sect_off
), objfile_name (objfile
));
22141 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22142 if (!attr
&& resolve_abstract_p
22143 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
->sect_off
)
22144 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
22146 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22147 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22148 struct gdbarch
*gdbarch
= objfile
->arch ();
22150 for (const auto &cand_off
22151 : dwarf2_per_objfile
->abstract_to_concrete
[die
->sect_off
])
22153 struct dwarf2_cu
*cand_cu
= cu
;
22154 struct die_info
*cand
22155 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22158 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22161 CORE_ADDR pc_low
, pc_high
;
22162 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22163 if (pc_low
== ((CORE_ADDR
) -1))
22165 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22166 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22167 if (!(pc_low
<= pc
&& pc
< pc_high
))
22171 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22178 /* DWARF: "If there is no such attribute, then there is no effect.".
22179 DATA is ignored if SIZE is 0. */
22181 retval
.data
= NULL
;
22184 else if (attr
->form_is_section_offset ())
22186 struct dwarf2_loclist_baton loclist_baton
;
22187 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22190 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22192 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22194 retval
.size
= size
;
22198 if (!attr
->form_is_block ())
22199 error (_("Dwarf Error: DIE at %s referenced in module %s "
22200 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22201 sect_offset_str (sect_off
), objfile_name (objfile
));
22203 retval
.data
= DW_BLOCK (attr
)->data
;
22204 retval
.size
= DW_BLOCK (attr
)->size
;
22206 retval
.per_cu
= cu
->per_cu
;
22208 age_cached_comp_units (dwarf2_per_objfile
);
22215 struct dwarf2_locexpr_baton
22216 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22217 dwarf2_per_cu_data
*per_cu
,
22218 CORE_ADDR (*get_frame_pc
) (void *baton
),
22221 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22223 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22226 /* Write a constant of a given type as target-ordered bytes into
22229 static const gdb_byte
*
22230 write_constant_as_bytes (struct obstack
*obstack
,
22231 enum bfd_endian byte_order
,
22238 *len
= TYPE_LENGTH (type
);
22239 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22240 store_unsigned_integer (result
, *len
, byte_order
, value
);
22248 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22249 dwarf2_per_cu_data
*per_cu
,
22253 struct dwarf2_cu
*cu
;
22254 struct die_info
*die
;
22255 struct attribute
*attr
;
22256 const gdb_byte
*result
= NULL
;
22259 enum bfd_endian byte_order
;
22260 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22262 if (per_cu
->cu
== NULL
)
22263 load_cu (per_cu
, false);
22267 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22268 Instead just throw an error, not much else we can do. */
22269 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22270 sect_offset_str (sect_off
), objfile_name (objfile
));
22273 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22275 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22276 sect_offset_str (sect_off
), objfile_name (objfile
));
22278 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22282 byte_order
= (bfd_big_endian (objfile
->obfd
)
22283 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22285 switch (attr
->form
)
22288 case DW_FORM_addrx
:
22289 case DW_FORM_GNU_addr_index
:
22293 *len
= cu
->header
.addr_size
;
22294 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22295 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22299 case DW_FORM_string
:
22302 case DW_FORM_GNU_str_index
:
22303 case DW_FORM_GNU_strp_alt
:
22304 /* DW_STRING is already allocated on the objfile obstack, point
22306 result
= (const gdb_byte
*) DW_STRING (attr
);
22307 *len
= strlen (DW_STRING (attr
));
22309 case DW_FORM_block1
:
22310 case DW_FORM_block2
:
22311 case DW_FORM_block4
:
22312 case DW_FORM_block
:
22313 case DW_FORM_exprloc
:
22314 case DW_FORM_data16
:
22315 result
= DW_BLOCK (attr
)->data
;
22316 *len
= DW_BLOCK (attr
)->size
;
22319 /* The DW_AT_const_value attributes are supposed to carry the
22320 symbol's value "represented as it would be on the target
22321 architecture." By the time we get here, it's already been
22322 converted to host endianness, so we just need to sign- or
22323 zero-extend it as appropriate. */
22324 case DW_FORM_data1
:
22325 type
= die_type (die
, cu
);
22326 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22327 if (result
== NULL
)
22328 result
= write_constant_as_bytes (obstack
, byte_order
,
22331 case DW_FORM_data2
:
22332 type
= die_type (die
, cu
);
22333 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22334 if (result
== NULL
)
22335 result
= write_constant_as_bytes (obstack
, byte_order
,
22338 case DW_FORM_data4
:
22339 type
= die_type (die
, cu
);
22340 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22341 if (result
== NULL
)
22342 result
= write_constant_as_bytes (obstack
, byte_order
,
22345 case DW_FORM_data8
:
22346 type
= die_type (die
, cu
);
22347 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22348 if (result
== NULL
)
22349 result
= write_constant_as_bytes (obstack
, byte_order
,
22353 case DW_FORM_sdata
:
22354 case DW_FORM_implicit_const
:
22355 type
= die_type (die
, cu
);
22356 result
= write_constant_as_bytes (obstack
, byte_order
,
22357 type
, DW_SND (attr
), len
);
22360 case DW_FORM_udata
:
22361 type
= die_type (die
, cu
);
22362 result
= write_constant_as_bytes (obstack
, byte_order
,
22363 type
, DW_UNSND (attr
), len
);
22367 complaint (_("unsupported const value attribute form: '%s'"),
22368 dwarf_form_name (attr
->form
));
22378 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22379 dwarf2_per_cu_data
*per_cu
)
22381 struct dwarf2_cu
*cu
;
22382 struct die_info
*die
;
22384 if (per_cu
->cu
== NULL
)
22385 load_cu (per_cu
, false);
22390 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22394 return die_type (die
, cu
);
22400 dwarf2_get_die_type (cu_offset die_offset
,
22401 struct dwarf2_per_cu_data
*per_cu
)
22403 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22404 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22407 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22408 On entry *REF_CU is the CU of SRC_DIE.
22409 On exit *REF_CU is the CU of the result.
22410 Returns NULL if the referenced DIE isn't found. */
22412 static struct die_info
*
22413 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22414 struct dwarf2_cu
**ref_cu
)
22416 struct die_info temp_die
;
22417 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22418 struct die_info
*die
;
22420 /* While it might be nice to assert sig_type->type == NULL here,
22421 we can get here for DW_AT_imported_declaration where we need
22422 the DIE not the type. */
22424 /* If necessary, add it to the queue and load its DIEs. */
22426 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22427 read_signatured_type (sig_type
);
22429 sig_cu
= sig_type
->per_cu
.cu
;
22430 gdb_assert (sig_cu
!= NULL
);
22431 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22432 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22433 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22434 to_underlying (temp_die
.sect_off
));
22437 struct dwarf2_per_objfile
*dwarf2_per_objfile
22438 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
22440 /* For .gdb_index version 7 keep track of included TUs.
22441 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22442 if (dwarf2_per_objfile
->index_table
!= NULL
22443 && dwarf2_per_objfile
->index_table
->version
<= 7)
22445 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22450 sig_cu
->ancestor
= cu
;
22458 /* Follow signatured type referenced by ATTR in SRC_DIE.
22459 On entry *REF_CU is the CU of SRC_DIE.
22460 On exit *REF_CU is the CU of the result.
22461 The result is the DIE of the type.
22462 If the referenced type cannot be found an error is thrown. */
22464 static struct die_info
*
22465 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22466 struct dwarf2_cu
**ref_cu
)
22468 ULONGEST signature
= DW_SIGNATURE (attr
);
22469 struct signatured_type
*sig_type
;
22470 struct die_info
*die
;
22472 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22474 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22475 /* sig_type will be NULL if the signatured type is missing from
22477 if (sig_type
== NULL
)
22479 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22480 " from DIE at %s [in module %s]"),
22481 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22482 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22485 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22488 dump_die_for_error (src_die
);
22489 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22490 " from DIE at %s [in module %s]"),
22491 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22492 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22498 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22499 reading in and processing the type unit if necessary. */
22501 static struct type
*
22502 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22503 struct dwarf2_cu
*cu
)
22505 struct dwarf2_per_objfile
*dwarf2_per_objfile
22506 = cu
->per_cu
->dwarf2_per_objfile
;
22507 struct signatured_type
*sig_type
;
22508 struct dwarf2_cu
*type_cu
;
22509 struct die_info
*type_die
;
22512 sig_type
= lookup_signatured_type (cu
, signature
);
22513 /* sig_type will be NULL if the signatured type is missing from
22515 if (sig_type
== NULL
)
22517 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22518 " from DIE at %s [in module %s]"),
22519 hex_string (signature
), sect_offset_str (die
->sect_off
),
22520 objfile_name (dwarf2_per_objfile
->objfile
));
22521 return build_error_marker_type (cu
, die
);
22524 /* If we already know the type we're done. */
22525 if (sig_type
->type
!= NULL
)
22526 return sig_type
->type
;
22529 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22530 if (type_die
!= NULL
)
22532 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22533 is created. This is important, for example, because for c++ classes
22534 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22535 type
= read_type_die (type_die
, type_cu
);
22538 complaint (_("Dwarf Error: Cannot build signatured type %s"
22539 " referenced from DIE at %s [in module %s]"),
22540 hex_string (signature
), sect_offset_str (die
->sect_off
),
22541 objfile_name (dwarf2_per_objfile
->objfile
));
22542 type
= build_error_marker_type (cu
, die
);
22547 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22548 " from DIE at %s [in module %s]"),
22549 hex_string (signature
), sect_offset_str (die
->sect_off
),
22550 objfile_name (dwarf2_per_objfile
->objfile
));
22551 type
= build_error_marker_type (cu
, die
);
22553 sig_type
->type
= type
;
22558 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22559 reading in and processing the type unit if necessary. */
22561 static struct type
*
22562 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22563 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22565 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22566 if (attr
->form_is_ref ())
22568 struct dwarf2_cu
*type_cu
= cu
;
22569 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22571 return read_type_die (type_die
, type_cu
);
22573 else if (attr
->form
== DW_FORM_ref_sig8
)
22575 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22579 struct dwarf2_per_objfile
*dwarf2_per_objfile
22580 = cu
->per_cu
->dwarf2_per_objfile
;
22582 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22583 " at %s [in module %s]"),
22584 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22585 objfile_name (dwarf2_per_objfile
->objfile
));
22586 return build_error_marker_type (cu
, die
);
22590 /* Load the DIEs associated with type unit PER_CU into memory. */
22593 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
22595 struct signatured_type
*sig_type
;
22597 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22598 gdb_assert (! per_cu
->type_unit_group_p ());
22600 /* We have the per_cu, but we need the signatured_type.
22601 Fortunately this is an easy translation. */
22602 gdb_assert (per_cu
->is_debug_types
);
22603 sig_type
= (struct signatured_type
*) per_cu
;
22605 gdb_assert (per_cu
->cu
== NULL
);
22607 read_signatured_type (sig_type
);
22609 gdb_assert (per_cu
->cu
!= NULL
);
22612 /* Read in a signatured type and build its CU and DIEs.
22613 If the type is a stub for the real type in a DWO file,
22614 read in the real type from the DWO file as well. */
22617 read_signatured_type (struct signatured_type
*sig_type
)
22619 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22621 gdb_assert (per_cu
->is_debug_types
);
22622 gdb_assert (per_cu
->cu
== NULL
);
22624 cutu_reader
reader (per_cu
, NULL
, 0, false);
22626 if (!reader
.dummy_p
)
22628 struct dwarf2_cu
*cu
= reader
.cu
;
22629 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22631 gdb_assert (cu
->die_hash
== NULL
);
22633 htab_create_alloc_ex (cu
->header
.length
/ 12,
22637 &cu
->comp_unit_obstack
,
22638 hashtab_obstack_allocate
,
22639 dummy_obstack_deallocate
);
22641 if (reader
.comp_unit_die
->has_children
)
22642 reader
.comp_unit_die
->child
22643 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22644 reader
.comp_unit_die
);
22645 cu
->dies
= reader
.comp_unit_die
;
22646 /* comp_unit_die is not stored in die_hash, no need. */
22648 /* We try not to read any attributes in this function, because
22649 not all CUs needed for references have been loaded yet, and
22650 symbol table processing isn't initialized. But we have to
22651 set the CU language, or we won't be able to build types
22652 correctly. Similarly, if we do not read the producer, we can
22653 not apply producer-specific interpretation. */
22654 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22659 sig_type
->per_cu
.tu_read
= 1;
22662 /* Decode simple location descriptions.
22663 Given a pointer to a dwarf block that defines a location, compute
22664 the location and return the value.
22666 NOTE drow/2003-11-18: This function is called in two situations
22667 now: for the address of static or global variables (partial symbols
22668 only) and for offsets into structures which are expected to be
22669 (more or less) constant. The partial symbol case should go away,
22670 and only the constant case should remain. That will let this
22671 function complain more accurately. A few special modes are allowed
22672 without complaint for global variables (for instance, global
22673 register values and thread-local values).
22675 A location description containing no operations indicates that the
22676 object is optimized out. The return value is 0 for that case.
22677 FIXME drow/2003-11-16: No callers check for this case any more; soon all
22678 callers will only want a very basic result and this can become a
22681 Note that stack[0] is unused except as a default error return. */
22684 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
22686 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22688 size_t size
= blk
->size
;
22689 const gdb_byte
*data
= blk
->data
;
22690 CORE_ADDR stack
[64];
22692 unsigned int bytes_read
, unsnd
;
22698 stack
[++stacki
] = 0;
22737 stack
[++stacki
] = op
- DW_OP_lit0
;
22772 stack
[++stacki
] = op
- DW_OP_reg0
;
22774 dwarf2_complex_location_expr_complaint ();
22778 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22780 stack
[++stacki
] = unsnd
;
22782 dwarf2_complex_location_expr_complaint ();
22786 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22791 case DW_OP_const1u
:
22792 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22796 case DW_OP_const1s
:
22797 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22801 case DW_OP_const2u
:
22802 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22806 case DW_OP_const2s
:
22807 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22811 case DW_OP_const4u
:
22812 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22816 case DW_OP_const4s
:
22817 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22821 case DW_OP_const8u
:
22822 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22827 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22833 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22838 stack
[stacki
+ 1] = stack
[stacki
];
22843 stack
[stacki
- 1] += stack
[stacki
];
22847 case DW_OP_plus_uconst
:
22848 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22854 stack
[stacki
- 1] -= stack
[stacki
];
22859 /* If we're not the last op, then we definitely can't encode
22860 this using GDB's address_class enum. This is valid for partial
22861 global symbols, although the variable's address will be bogus
22864 dwarf2_complex_location_expr_complaint ();
22867 case DW_OP_GNU_push_tls_address
:
22868 case DW_OP_form_tls_address
:
22869 /* The top of the stack has the offset from the beginning
22870 of the thread control block at which the variable is located. */
22871 /* Nothing should follow this operator, so the top of stack would
22873 /* This is valid for partial global symbols, but the variable's
22874 address will be bogus in the psymtab. Make it always at least
22875 non-zero to not look as a variable garbage collected by linker
22876 which have DW_OP_addr 0. */
22878 dwarf2_complex_location_expr_complaint ();
22882 case DW_OP_GNU_uninit
:
22886 case DW_OP_GNU_addr_index
:
22887 case DW_OP_GNU_const_index
:
22888 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22895 const char *name
= get_DW_OP_name (op
);
22898 complaint (_("unsupported stack op: '%s'"),
22901 complaint (_("unsupported stack op: '%02x'"),
22905 return (stack
[stacki
]);
22908 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22909 outside of the allocated space. Also enforce minimum>0. */
22910 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22912 complaint (_("location description stack overflow"));
22918 complaint (_("location description stack underflow"));
22922 return (stack
[stacki
]);
22925 /* memory allocation interface */
22927 static struct dwarf_block
*
22928 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22930 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22933 static struct die_info
*
22934 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22936 struct die_info
*die
;
22937 size_t size
= sizeof (struct die_info
);
22940 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22942 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
22943 memset (die
, 0, sizeof (struct die_info
));
22949 /* Macro support. */
22951 /* An overload of dwarf_decode_macros that finds the correct section
22952 and ensures it is read in before calling the other overload. */
22955 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22956 int section_is_gnu
)
22958 struct dwarf2_per_objfile
*dwarf2_per_objfile
22959 = cu
->per_cu
->dwarf2_per_objfile
;
22960 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22961 const struct line_header
*lh
= cu
->line_header
;
22962 unsigned int offset_size
= cu
->header
.offset_size
;
22963 struct dwarf2_section_info
*section
;
22964 const char *section_name
;
22966 if (cu
->dwo_unit
!= nullptr)
22968 if (section_is_gnu
)
22970 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22971 section_name
= ".debug_macro.dwo";
22975 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22976 section_name
= ".debug_macinfo.dwo";
22981 if (section_is_gnu
)
22983 section
= &dwarf2_per_objfile
->macro
;
22984 section_name
= ".debug_macro";
22988 section
= &dwarf2_per_objfile
->macinfo
;
22989 section_name
= ".debug_macinfo";
22993 section
->read (objfile
);
22994 if (section
->buffer
== nullptr)
22996 complaint (_("missing %s section"), section_name
);
23000 buildsym_compunit
*builder
= cu
->get_builder ();
23002 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23003 offset_size
, offset
, section_is_gnu
);
23006 /* Return the .debug_loc section to use for CU.
23007 For DWO files use .debug_loc.dwo. */
23009 static struct dwarf2_section_info
*
23010 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23012 struct dwarf2_per_objfile
*dwarf2_per_objfile
23013 = cu
->per_cu
->dwarf2_per_objfile
;
23017 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23019 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23021 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23022 : &dwarf2_per_objfile
->loc
);
23025 /* A helper function that fills in a dwarf2_loclist_baton. */
23028 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23029 struct dwarf2_loclist_baton
*baton
,
23030 const struct attribute
*attr
)
23032 struct dwarf2_per_objfile
*dwarf2_per_objfile
23033 = cu
->per_cu
->dwarf2_per_objfile
;
23034 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23036 section
->read (dwarf2_per_objfile
->objfile
);
23038 baton
->per_cu
= cu
->per_cu
;
23039 gdb_assert (baton
->per_cu
);
23040 /* We don't know how long the location list is, but make sure we
23041 don't run off the edge of the section. */
23042 baton
->size
= section
->size
- DW_UNSND (attr
);
23043 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23044 if (cu
->base_address
.has_value ())
23045 baton
->base_address
= *cu
->base_address
;
23047 baton
->base_address
= 0;
23048 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23052 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23053 struct dwarf2_cu
*cu
, int is_block
)
23055 struct dwarf2_per_objfile
*dwarf2_per_objfile
23056 = cu
->per_cu
->dwarf2_per_objfile
;
23057 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23058 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23060 if (attr
->form_is_section_offset ()
23061 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23062 the section. If so, fall through to the complaint in the
23064 && DW_UNSND (attr
) < section
->get_size (objfile
))
23066 struct dwarf2_loclist_baton
*baton
;
23068 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23070 fill_in_loclist_baton (cu
, baton
, attr
);
23072 if (!cu
->base_address
.has_value ())
23073 complaint (_("Location list used without "
23074 "specifying the CU base address."));
23076 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23077 ? dwarf2_loclist_block_index
23078 : dwarf2_loclist_index
);
23079 SYMBOL_LOCATION_BATON (sym
) = baton
;
23083 struct dwarf2_locexpr_baton
*baton
;
23085 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23086 baton
->per_cu
= cu
->per_cu
;
23087 gdb_assert (baton
->per_cu
);
23089 if (attr
->form_is_block ())
23091 /* Note that we're just copying the block's data pointer
23092 here, not the actual data. We're still pointing into the
23093 info_buffer for SYM's objfile; right now we never release
23094 that buffer, but when we do clean up properly this may
23096 baton
->size
= DW_BLOCK (attr
)->size
;
23097 baton
->data
= DW_BLOCK (attr
)->data
;
23101 dwarf2_invalid_attrib_class_complaint ("location description",
23102 sym
->natural_name ());
23106 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23107 ? dwarf2_locexpr_block_index
23108 : dwarf2_locexpr_index
);
23109 SYMBOL_LOCATION_BATON (sym
) = baton
;
23116 dwarf2_per_cu_data::objfile () const
23118 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23120 /* Return the master objfile, so that we can report and look up the
23121 correct file containing this variable. */
23122 if (objfile
->separate_debug_objfile_backlink
)
23123 objfile
= objfile
->separate_debug_objfile_backlink
;
23128 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23129 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23130 CU_HEADERP first. */
23132 static const struct comp_unit_head
*
23133 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23134 const struct dwarf2_per_cu_data
*per_cu
)
23136 const gdb_byte
*info_ptr
;
23139 return &per_cu
->cu
->header
;
23141 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23143 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23144 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23145 rcuh_kind::COMPILE
);
23153 dwarf2_per_cu_data::addr_size () const
23155 struct comp_unit_head cu_header_local
;
23156 const struct comp_unit_head
*cu_headerp
;
23158 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23160 return cu_headerp
->addr_size
;
23166 dwarf2_per_cu_data::offset_size () const
23168 struct comp_unit_head cu_header_local
;
23169 const struct comp_unit_head
*cu_headerp
;
23171 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23173 return cu_headerp
->offset_size
;
23179 dwarf2_per_cu_data::ref_addr_size () const
23181 struct comp_unit_head cu_header_local
;
23182 const struct comp_unit_head
*cu_headerp
;
23184 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23186 if (cu_headerp
->version
== 2)
23187 return cu_headerp
->addr_size
;
23189 return cu_headerp
->offset_size
;
23195 dwarf2_per_cu_data::text_offset () const
23197 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23199 return objfile
->text_section_offset ();
23205 dwarf2_per_cu_data::addr_type () const
23207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23208 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23209 struct type
*addr_type
= lookup_pointer_type (void_type
);
23210 int addr_size
= this->addr_size ();
23212 if (TYPE_LENGTH (addr_type
) == addr_size
)
23215 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23219 /* A helper function for dwarf2_find_containing_comp_unit that returns
23220 the index of the result, and that searches a vector. It will
23221 return a result even if the offset in question does not actually
23222 occur in any CU. This is separate so that it can be unit
23226 dwarf2_find_containing_comp_unit
23227 (sect_offset sect_off
,
23228 unsigned int offset_in_dwz
,
23229 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23234 high
= all_comp_units
.size () - 1;
23237 struct dwarf2_per_cu_data
*mid_cu
;
23238 int mid
= low
+ (high
- low
) / 2;
23240 mid_cu
= all_comp_units
[mid
];
23241 if (mid_cu
->is_dwz
> offset_in_dwz
23242 || (mid_cu
->is_dwz
== offset_in_dwz
23243 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23248 gdb_assert (low
== high
);
23252 /* Locate the .debug_info compilation unit from CU's objfile which contains
23253 the DIE at OFFSET. Raises an error on failure. */
23255 static struct dwarf2_per_cu_data
*
23256 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23257 unsigned int offset_in_dwz
,
23258 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23261 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23262 dwarf2_per_objfile
->all_comp_units
);
23263 struct dwarf2_per_cu_data
*this_cu
23264 = dwarf2_per_objfile
->all_comp_units
[low
];
23266 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23268 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23269 error (_("Dwarf Error: could not find partial DIE containing "
23270 "offset %s [in module %s]"),
23271 sect_offset_str (sect_off
),
23272 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23274 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23276 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23280 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
23281 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23282 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23283 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23290 namespace selftests
{
23291 namespace find_containing_comp_unit
{
23296 struct dwarf2_per_cu_data one
{};
23297 struct dwarf2_per_cu_data two
{};
23298 struct dwarf2_per_cu_data three
{};
23299 struct dwarf2_per_cu_data four
{};
23302 two
.sect_off
= sect_offset (one
.length
);
23307 four
.sect_off
= sect_offset (three
.length
);
23311 std::vector
<dwarf2_per_cu_data
*> units
;
23312 units
.push_back (&one
);
23313 units
.push_back (&two
);
23314 units
.push_back (&three
);
23315 units
.push_back (&four
);
23319 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23320 SELF_CHECK (units
[result
] == &one
);
23321 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23322 SELF_CHECK (units
[result
] == &one
);
23323 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23324 SELF_CHECK (units
[result
] == &two
);
23326 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23327 SELF_CHECK (units
[result
] == &three
);
23328 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23329 SELF_CHECK (units
[result
] == &three
);
23330 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23331 SELF_CHECK (units
[result
] == &four
);
23337 #endif /* GDB_SELF_TEST */
23339 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23341 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
23342 : per_cu (per_cu_
),
23344 has_loclist (false),
23345 checked_producer (false),
23346 producer_is_gxx_lt_4_6 (false),
23347 producer_is_gcc_lt_4_3 (false),
23348 producer_is_icc (false),
23349 producer_is_icc_lt_14 (false),
23350 producer_is_codewarrior (false),
23351 processing_has_namespace_info (false)
23356 /* Destroy a dwarf2_cu. */
23358 dwarf2_cu::~dwarf2_cu ()
23363 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23366 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23367 enum language pretend_language
)
23369 struct attribute
*attr
;
23371 /* Set the language we're debugging. */
23372 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23373 if (attr
!= nullptr)
23374 set_cu_language (DW_UNSND (attr
), cu
);
23377 cu
->language
= pretend_language
;
23378 cu
->language_defn
= language_def (cu
->language
);
23381 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23384 /* Increase the age counter on each cached compilation unit, and free
23385 any that are too old. */
23388 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23390 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23392 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23393 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23394 while (per_cu
!= NULL
)
23396 per_cu
->cu
->last_used
++;
23397 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23398 dwarf2_mark (per_cu
->cu
);
23399 per_cu
= per_cu
->cu
->read_in_chain
;
23402 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23403 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23404 while (per_cu
!= NULL
)
23406 struct dwarf2_per_cu_data
*next_cu
;
23408 next_cu
= per_cu
->cu
->read_in_chain
;
23410 if (!per_cu
->cu
->mark
)
23413 *last_chain
= next_cu
;
23416 last_chain
= &per_cu
->cu
->read_in_chain
;
23422 /* Remove a single compilation unit from the cache. */
23425 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23427 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23428 struct dwarf2_per_objfile
*dwarf2_per_objfile
23429 = target_per_cu
->dwarf2_per_objfile
;
23431 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23432 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23433 while (per_cu
!= NULL
)
23435 struct dwarf2_per_cu_data
*next_cu
;
23437 next_cu
= per_cu
->cu
->read_in_chain
;
23439 if (per_cu
== target_per_cu
)
23443 *last_chain
= next_cu
;
23447 last_chain
= &per_cu
->cu
->read_in_chain
;
23453 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23454 We store these in a hash table separate from the DIEs, and preserve them
23455 when the DIEs are flushed out of cache.
23457 The CU "per_cu" pointer is needed because offset alone is not enough to
23458 uniquely identify the type. A file may have multiple .debug_types sections,
23459 or the type may come from a DWO file. Furthermore, while it's more logical
23460 to use per_cu->section+offset, with Fission the section with the data is in
23461 the DWO file but we don't know that section at the point we need it.
23462 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23463 because we can enter the lookup routine, get_die_type_at_offset, from
23464 outside this file, and thus won't necessarily have PER_CU->cu.
23465 Fortunately, PER_CU is stable for the life of the objfile. */
23467 struct dwarf2_per_cu_offset_and_type
23469 const struct dwarf2_per_cu_data
*per_cu
;
23470 sect_offset sect_off
;
23474 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23477 per_cu_offset_and_type_hash (const void *item
)
23479 const struct dwarf2_per_cu_offset_and_type
*ofs
23480 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23482 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23485 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23488 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23490 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23491 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23492 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23493 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23495 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23496 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23499 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23500 table if necessary. For convenience, return TYPE.
23502 The DIEs reading must have careful ordering to:
23503 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23504 reading current DIE.
23505 * Not trying to dereference contents of still incompletely read in types
23506 while reading in other DIEs.
23507 * Enable referencing still incompletely read in types just by a pointer to
23508 the type without accessing its fields.
23510 Therefore caller should follow these rules:
23511 * Try to fetch any prerequisite types we may need to build this DIE type
23512 before building the type and calling set_die_type.
23513 * After building type call set_die_type for current DIE as soon as
23514 possible before fetching more types to complete the current type.
23515 * Make the type as complete as possible before fetching more types. */
23517 static struct type
*
23518 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23520 struct dwarf2_per_objfile
*dwarf2_per_objfile
23521 = cu
->per_cu
->dwarf2_per_objfile
;
23522 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23523 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23524 struct attribute
*attr
;
23525 struct dynamic_prop prop
;
23527 /* For Ada types, make sure that the gnat-specific data is always
23528 initialized (if not already set). There are a few types where
23529 we should not be doing so, because the type-specific area is
23530 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23531 where the type-specific area is used to store the floatformat).
23532 But this is not a problem, because the gnat-specific information
23533 is actually not needed for these types. */
23534 if (need_gnat_info (cu
)
23535 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23536 && TYPE_CODE (type
) != TYPE_CODE_FLT
23537 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23538 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23539 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23540 && !HAVE_GNAT_AUX_INFO (type
))
23541 INIT_GNAT_SPECIFIC (type
);
23543 /* Read DW_AT_allocated and set in type. */
23544 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23545 if (attr
!= NULL
&& attr
->form_is_block ())
23547 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23548 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23549 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
23551 else if (attr
!= NULL
)
23553 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23554 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23555 sect_offset_str (die
->sect_off
));
23558 /* Read DW_AT_associated and set in type. */
23559 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23560 if (attr
!= NULL
&& attr
->form_is_block ())
23562 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23563 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23564 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
23566 else if (attr
!= NULL
)
23568 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23569 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23570 sect_offset_str (die
->sect_off
));
23573 /* Read DW_AT_data_location and set in type. */
23574 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23575 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23576 cu
->per_cu
->addr_type ()))
23577 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
23579 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23580 dwarf2_per_objfile
->die_type_hash
23581 = htab_up (htab_create_alloc (127,
23582 per_cu_offset_and_type_hash
,
23583 per_cu_offset_and_type_eq
,
23584 NULL
, xcalloc
, xfree
));
23586 ofs
.per_cu
= cu
->per_cu
;
23587 ofs
.sect_off
= die
->sect_off
;
23589 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23590 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23592 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23593 sect_offset_str (die
->sect_off
));
23594 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23595 struct dwarf2_per_cu_offset_and_type
);
23600 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23601 or return NULL if the die does not have a saved type. */
23603 static struct type
*
23604 get_die_type_at_offset (sect_offset sect_off
,
23605 struct dwarf2_per_cu_data
*per_cu
)
23607 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23608 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23610 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23613 ofs
.per_cu
= per_cu
;
23614 ofs
.sect_off
= sect_off
;
23615 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23616 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23623 /* Look up the type for DIE in CU in die_type_hash,
23624 or return NULL if DIE does not have a saved type. */
23626 static struct type
*
23627 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23629 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23632 /* Add a dependence relationship from CU to REF_PER_CU. */
23635 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23636 struct dwarf2_per_cu_data
*ref_per_cu
)
23640 if (cu
->dependencies
== NULL
)
23642 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23643 NULL
, &cu
->comp_unit_obstack
,
23644 hashtab_obstack_allocate
,
23645 dummy_obstack_deallocate
);
23647 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23649 *slot
= ref_per_cu
;
23652 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23653 Set the mark field in every compilation unit in the
23654 cache that we must keep because we are keeping CU. */
23657 dwarf2_mark_helper (void **slot
, void *data
)
23659 struct dwarf2_per_cu_data
*per_cu
;
23661 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23663 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23664 reading of the chain. As such dependencies remain valid it is not much
23665 useful to track and undo them during QUIT cleanups. */
23666 if (per_cu
->cu
== NULL
)
23669 if (per_cu
->cu
->mark
)
23671 per_cu
->cu
->mark
= true;
23673 if (per_cu
->cu
->dependencies
!= NULL
)
23674 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23679 /* Set the mark field in CU and in every other compilation unit in the
23680 cache that we must keep because we are keeping CU. */
23683 dwarf2_mark (struct dwarf2_cu
*cu
)
23688 if (cu
->dependencies
!= NULL
)
23689 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23693 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23697 per_cu
->cu
->mark
= false;
23698 per_cu
= per_cu
->cu
->read_in_chain
;
23702 /* Trivial hash function for partial_die_info: the hash value of a DIE
23703 is its offset in .debug_info for this objfile. */
23706 partial_die_hash (const void *item
)
23708 const struct partial_die_info
*part_die
23709 = (const struct partial_die_info
*) item
;
23711 return to_underlying (part_die
->sect_off
);
23714 /* Trivial comparison function for partial_die_info structures: two DIEs
23715 are equal if they have the same offset. */
23718 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23720 const struct partial_die_info
*part_die_lhs
23721 = (const struct partial_die_info
*) item_lhs
;
23722 const struct partial_die_info
*part_die_rhs
23723 = (const struct partial_die_info
*) item_rhs
;
23725 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23728 struct cmd_list_element
*set_dwarf_cmdlist
;
23729 struct cmd_list_element
*show_dwarf_cmdlist
;
23732 show_check_physname (struct ui_file
*file
, int from_tty
,
23733 struct cmd_list_element
*c
, const char *value
)
23735 fprintf_filtered (file
,
23736 _("Whether to check \"physname\" is %s.\n"),
23740 void _initialize_dwarf2_read ();
23742 _initialize_dwarf2_read ()
23744 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23745 Set DWARF specific variables.\n\
23746 Configure DWARF variables such as the cache size."),
23747 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23748 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23750 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23751 Show DWARF specific variables.\n\
23752 Show DWARF variables such as the cache size."),
23753 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23754 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23756 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23757 &dwarf_max_cache_age
, _("\
23758 Set the upper bound on the age of cached DWARF compilation units."), _("\
23759 Show the upper bound on the age of cached DWARF compilation units."), _("\
23760 A higher limit means that cached compilation units will be stored\n\
23761 in memory longer, and more total memory will be used. Zero disables\n\
23762 caching, which can slow down startup."),
23764 show_dwarf_max_cache_age
,
23765 &set_dwarf_cmdlist
,
23766 &show_dwarf_cmdlist
);
23768 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23769 Set debugging of the DWARF reader."), _("\
23770 Show debugging of the DWARF reader."), _("\
23771 When enabled (non-zero), debugging messages are printed during DWARF\n\
23772 reading and symtab expansion. A value of 1 (one) provides basic\n\
23773 information. A value greater than 1 provides more verbose information."),
23776 &setdebuglist
, &showdebuglist
);
23778 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23779 Set debugging of the DWARF DIE reader."), _("\
23780 Show debugging of the DWARF DIE reader."), _("\
23781 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23782 The value is the maximum depth to print."),
23785 &setdebuglist
, &showdebuglist
);
23787 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23788 Set debugging of the dwarf line reader."), _("\
23789 Show debugging of the dwarf line reader."), _("\
23790 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23791 A value of 1 (one) provides basic information.\n\
23792 A value greater than 1 provides more verbose information."),
23795 &setdebuglist
, &showdebuglist
);
23797 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23798 Set cross-checking of \"physname\" code against demangler."), _("\
23799 Show cross-checking of \"physname\" code against demangler."), _("\
23800 When enabled, GDB's internal \"physname\" code is checked against\n\
23802 NULL
, show_check_physname
,
23803 &setdebuglist
, &showdebuglist
);
23805 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23806 no_class
, &use_deprecated_index_sections
, _("\
23807 Set whether to use deprecated gdb_index sections."), _("\
23808 Show whether to use deprecated gdb_index sections."), _("\
23809 When enabled, deprecated .gdb_index sections are used anyway.\n\
23810 Normally they are ignored either because of a missing feature or\n\
23811 performance issue.\n\
23812 Warning: This option must be enabled before gdb reads the file."),
23815 &setlist
, &showlist
);
23817 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23818 &dwarf2_locexpr_funcs
);
23819 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23820 &dwarf2_loclist_funcs
);
23822 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23823 &dwarf2_block_frame_base_locexpr_funcs
);
23824 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23825 &dwarf2_block_frame_base_loclist_funcs
);
23828 selftests::register_test ("dw2_expand_symtabs_matching",
23829 selftests::dw2_expand_symtabs_matching::run_test
);
23830 selftests::register_test ("dwarf2_find_containing_comp_unit",
23831 selftests::find_containing_comp_unit::run_test
);