1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2021 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 /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 1. */
98 #define dwarf_read_debug_printf(fmt, ...) \
99 debug_prefixed_printf_cond (dwarf_read_debug >= 1, "dwarf-read", fmt, \
102 /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 2. */
104 #define dwarf_read_debug_printf_v(fmt, ...) \
105 debug_prefixed_printf_cond (dwarf_read_debug >= 2, "dwarf-read", fmt, \
108 /* When non-zero, dump DIEs after they are read in. */
109 static unsigned int dwarf_die_debug
= 0;
111 /* When non-zero, dump line number entries as they are read in. */
112 unsigned int dwarf_line_debug
= 0;
114 /* When true, cross-check physname against demangler. */
115 static bool check_physname
= false;
117 /* When true, do not reject deprecated .gdb_index sections. */
118 static bool use_deprecated_index_sections
= false;
120 /* This is used to store the data that is always per objfile. */
121 static const objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
123 /* These are used to store the dwarf2_per_bfd objects.
125 objfiles having the same BFD, which doesn't require relocations, are going to
126 share a dwarf2_per_bfd object, which is held in the _bfd_data_key version.
128 Other objfiles are not going to share a dwarf2_per_bfd with any other
129 objfiles, so they'll have their own version kept in the _objfile_data_key
131 static const struct bfd_key
<dwarf2_per_bfd
> dwarf2_per_bfd_bfd_data_key
;
132 static const struct objfile_key
<dwarf2_per_bfd
> dwarf2_per_bfd_objfile_data_key
;
134 /* The "aclass" indices for various kinds of computed DWARF symbols. */
136 static int dwarf2_locexpr_index
;
137 static int dwarf2_loclist_index
;
138 static int dwarf2_locexpr_block_index
;
139 static int dwarf2_loclist_block_index
;
141 /* Size of .debug_loclists section header for 32-bit DWARF format. */
142 #define LOCLIST_HEADER_SIZE32 12
144 /* Size of .debug_loclists section header for 64-bit DWARF format. */
145 #define LOCLIST_HEADER_SIZE64 20
147 /* Size of .debug_rnglists section header for 32-bit DWARF format. */
148 #define RNGLIST_HEADER_SIZE32 12
150 /* Size of .debug_rnglists section header for 64-bit DWARF format. */
151 #define RNGLIST_HEADER_SIZE64 20
153 /* An index into a (C++) symbol name component in a symbol name as
154 recorded in the mapped_index's symbol table. For each C++ symbol
155 in the symbol table, we record one entry for the start of each
156 component in the symbol in a table of name components, and then
157 sort the table, in order to be able to binary search symbol names,
158 ignoring leading namespaces, both completion and regular look up.
159 For example, for symbol "A::B::C", we'll have an entry that points
160 to "A::B::C", another that points to "B::C", and another for "C".
161 Note that function symbols in GDB index have no parameter
162 information, just the function/method names. You can convert a
163 name_component to a "const char *" using the
164 'mapped_index::symbol_name_at(offset_type)' method. */
166 struct name_component
168 /* Offset in the symbol name where the component starts. Stored as
169 a (32-bit) offset instead of a pointer to save memory and improve
170 locality on 64-bit architectures. */
171 offset_type name_offset
;
173 /* The symbol's index in the symbol and constant pool tables of a
178 /* Base class containing bits shared by both .gdb_index and
179 .debug_name indexes. */
181 struct mapped_index_base
183 mapped_index_base () = default;
184 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
186 /* The name_component table (a sorted vector). See name_component's
187 description above. */
188 std::vector
<name_component
> name_components
;
190 /* How NAME_COMPONENTS is sorted. */
191 enum case_sensitivity name_components_casing
;
193 /* Return the number of names in the symbol table. */
194 virtual size_t symbol_name_count () const = 0;
196 /* Get the name of the symbol at IDX in the symbol table. */
197 virtual const char *symbol_name_at
198 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const = 0;
200 /* Return whether the name at IDX in the symbol table should be
202 virtual bool symbol_name_slot_invalid (offset_type idx
) const
207 /* Build the symbol name component sorted vector, if we haven't
209 void build_name_components (dwarf2_per_objfile
*per_objfile
);
211 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
212 possible matches for LN_NO_PARAMS in the name component
214 std::pair
<std::vector
<name_component
>::const_iterator
,
215 std::vector
<name_component
>::const_iterator
>
216 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
218 dwarf2_per_objfile
*per_objfile
) const;
220 /* Prevent deleting/destroying via a base class pointer. */
222 ~mapped_index_base() = default;
225 /* A description of the mapped index. The file format is described in
226 a comment by the code that writes the index. */
227 struct mapped_index final
: public mapped_index_base
229 /* A slot/bucket in the symbol table hash. */
230 struct symbol_table_slot
232 const offset_type name
;
233 const offset_type vec
;
236 /* Index data format version. */
239 /* The address table data. */
240 gdb::array_view
<const gdb_byte
> address_table
;
242 /* The symbol table, implemented as a hash table. */
243 gdb::array_view
<symbol_table_slot
> symbol_table
;
245 /* A pointer to the constant pool. */
246 const char *constant_pool
= nullptr;
248 bool symbol_name_slot_invalid (offset_type idx
) const override
250 const auto &bucket
= this->symbol_table
[idx
];
251 return bucket
.name
== 0 && bucket
.vec
== 0;
254 /* Convenience method to get at the name of the symbol at IDX in the
256 const char *symbol_name_at
257 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
258 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
260 size_t symbol_name_count () const override
261 { return this->symbol_table
.size (); }
264 /* A description of the mapped .debug_names.
265 Uninitialized map has CU_COUNT 0. */
266 struct mapped_debug_names final
: public mapped_index_base
268 bfd_endian dwarf5_byte_order
;
269 bool dwarf5_is_dwarf64
;
270 bool augmentation_is_gdb
;
272 uint32_t cu_count
= 0;
273 uint32_t tu_count
, bucket_count
, name_count
;
274 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
275 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
276 const gdb_byte
*name_table_string_offs_reordered
;
277 const gdb_byte
*name_table_entry_offs_reordered
;
278 const gdb_byte
*entry_pool
;
285 /* Attribute name DW_IDX_*. */
288 /* Attribute form DW_FORM_*. */
291 /* Value if FORM is DW_FORM_implicit_const. */
292 LONGEST implicit_const
;
294 std::vector
<attr
> attr_vec
;
297 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
299 const char *namei_to_name
300 (uint32_t namei
, dwarf2_per_objfile
*per_objfile
) const;
302 /* Implementation of the mapped_index_base virtual interface, for
303 the name_components cache. */
305 const char *symbol_name_at
306 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
307 { return namei_to_name (idx
, per_objfile
); }
309 size_t symbol_name_count () const override
310 { return this->name_count
; }
313 /* See dwarf2read.h. */
316 get_dwarf2_per_objfile (struct objfile
*objfile
)
318 return dwarf2_objfile_data_key
.get (objfile
);
321 /* Default names of the debugging sections. */
323 /* Note that if the debugging section has been compressed, it might
324 have a name like .zdebug_info. */
326 static const struct dwarf2_debug_sections dwarf2_elf_names
=
328 { ".debug_info", ".zdebug_info" },
329 { ".debug_abbrev", ".zdebug_abbrev" },
330 { ".debug_line", ".zdebug_line" },
331 { ".debug_loc", ".zdebug_loc" },
332 { ".debug_loclists", ".zdebug_loclists" },
333 { ".debug_macinfo", ".zdebug_macinfo" },
334 { ".debug_macro", ".zdebug_macro" },
335 { ".debug_str", ".zdebug_str" },
336 { ".debug_str_offsets", ".zdebug_str_offsets" },
337 { ".debug_line_str", ".zdebug_line_str" },
338 { ".debug_ranges", ".zdebug_ranges" },
339 { ".debug_rnglists", ".zdebug_rnglists" },
340 { ".debug_types", ".zdebug_types" },
341 { ".debug_addr", ".zdebug_addr" },
342 { ".debug_frame", ".zdebug_frame" },
343 { ".eh_frame", NULL
},
344 { ".gdb_index", ".zgdb_index" },
345 { ".debug_names", ".zdebug_names" },
346 { ".debug_aranges", ".zdebug_aranges" },
350 /* List of DWO/DWP sections. */
352 static const struct dwop_section_names
354 struct dwarf2_section_names abbrev_dwo
;
355 struct dwarf2_section_names info_dwo
;
356 struct dwarf2_section_names line_dwo
;
357 struct dwarf2_section_names loc_dwo
;
358 struct dwarf2_section_names loclists_dwo
;
359 struct dwarf2_section_names macinfo_dwo
;
360 struct dwarf2_section_names macro_dwo
;
361 struct dwarf2_section_names rnglists_dwo
;
362 struct dwarf2_section_names str_dwo
;
363 struct dwarf2_section_names str_offsets_dwo
;
364 struct dwarf2_section_names types_dwo
;
365 struct dwarf2_section_names cu_index
;
366 struct dwarf2_section_names tu_index
;
370 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
371 { ".debug_info.dwo", ".zdebug_info.dwo" },
372 { ".debug_line.dwo", ".zdebug_line.dwo" },
373 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
374 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
375 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
376 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
377 { ".debug_rnglists.dwo", ".zdebug_rnglists.dwo" },
378 { ".debug_str.dwo", ".zdebug_str.dwo" },
379 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
380 { ".debug_types.dwo", ".zdebug_types.dwo" },
381 { ".debug_cu_index", ".zdebug_cu_index" },
382 { ".debug_tu_index", ".zdebug_tu_index" },
385 /* local data types */
387 /* The location list and range list sections (.debug_loclists & .debug_rnglists)
388 begin with a header, which contains the following information. */
389 struct loclists_rnglists_header
391 /* A 4-byte or 12-byte length containing the length of the
392 set of entries for this compilation unit, not including the
393 length field itself. */
396 /* A 2-byte version identifier. */
399 /* A 1-byte unsigned integer containing the size in bytes of an address on
400 the target system. */
401 unsigned char addr_size
;
403 /* A 1-byte unsigned integer containing the size in bytes of a segment selector
404 on the target system. */
405 unsigned char segment_collector_size
;
407 /* A 4-byte count of the number of offsets that follow the header. */
408 unsigned int offset_entry_count
;
411 /* Type used for delaying computation of method physnames.
412 See comments for compute_delayed_physnames. */
413 struct delayed_method_info
415 /* The type to which the method is attached, i.e., its parent class. */
418 /* The index of the method in the type's function fieldlists. */
421 /* The index of the method in the fieldlist. */
424 /* The name of the DIE. */
427 /* The DIE associated with this method. */
428 struct die_info
*die
;
431 /* Internal state when decoding a particular compilation unit. */
434 explicit dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
435 dwarf2_per_objfile
*per_objfile
);
437 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
439 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
440 Create the set of symtabs used by this TU, or if this TU is sharing
441 symtabs with another TU and the symtabs have already been created
442 then restore those symtabs in the line header.
443 We don't need the pc/line-number mapping for type units. */
444 void setup_type_unit_groups (struct die_info
*die
);
446 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
447 buildsym_compunit constructor. */
448 struct compunit_symtab
*start_symtab (const char *name
,
449 const char *comp_dir
,
452 /* Reset the builder. */
453 void reset_builder () { m_builder
.reset (); }
455 /* Return a type that is a generic pointer type, the size of which
456 matches the address size given in the compilation unit header for
458 struct type
*addr_type () const;
460 /* Find an integer type the same size as the address size given in
461 the compilation unit header for this CU. UNSIGNED_P controls if
462 the integer is unsigned or not. */
463 struct type
*addr_sized_int_type (bool unsigned_p
) const;
465 /* The header of the compilation unit. */
466 struct comp_unit_head header
{};
468 /* Base address of this compilation unit. */
469 gdb::optional
<CORE_ADDR
> base_address
;
471 /* The language we are debugging. */
472 enum language language
= language_unknown
;
473 const struct language_defn
*language_defn
= nullptr;
475 const char *producer
= nullptr;
478 /* The symtab builder for this CU. This is only non-NULL when full
479 symbols are being read. */
480 std::unique_ptr
<buildsym_compunit
> m_builder
;
483 /* The generic symbol table building routines have separate lists for
484 file scope symbols and all all other scopes (local scopes). So
485 we need to select the right one to pass to add_symbol_to_list().
486 We do it by keeping a pointer to the correct list in list_in_scope.
488 FIXME: The original dwarf code just treated the file scope as the
489 first local scope, and all other local scopes as nested local
490 scopes, and worked fine. Check to see if we really need to
491 distinguish these in buildsym.c. */
492 struct pending
**list_in_scope
= nullptr;
494 /* Hash table holding all the loaded partial DIEs
495 with partial_die->offset.SECT_OFF as hash. */
496 htab_t partial_dies
= nullptr;
498 /* Storage for things with the same lifetime as this read-in compilation
499 unit, including partial DIEs. */
500 auto_obstack comp_unit_obstack
;
502 /* Backlink to our per_cu entry. */
503 struct dwarf2_per_cu_data
*per_cu
;
505 /* The dwarf2_per_objfile that owns this. */
506 dwarf2_per_objfile
*per_objfile
;
508 /* How many compilation units ago was this CU last referenced? */
511 /* A hash table of DIE cu_offset for following references with
512 die_info->offset.sect_off as hash. */
513 htab_t die_hash
= nullptr;
515 /* Full DIEs if read in. */
516 struct die_info
*dies
= nullptr;
518 /* A set of pointers to dwarf2_per_cu_data objects for compilation
519 units referenced by this one. Only set during full symbol processing;
520 partial symbol tables do not have dependencies. */
521 htab_t dependencies
= nullptr;
523 /* Header data from the line table, during full symbol processing. */
524 struct line_header
*line_header
= nullptr;
525 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
526 it's owned by dwarf2_per_bfd::line_header_hash. If non-NULL,
527 this is the DW_TAG_compile_unit die for this CU. We'll hold on
528 to the line header as long as this DIE is being processed. See
529 process_die_scope. */
530 die_info
*line_header_die_owner
= nullptr;
532 /* A list of methods which need to have physnames computed
533 after all type information has been read. */
534 std::vector
<delayed_method_info
> method_list
;
536 /* To be copied to symtab->call_site_htab. */
537 htab_t call_site_htab
= nullptr;
539 /* Non-NULL if this CU came from a DWO file.
540 There is an invariant here that is important to remember:
541 Except for attributes copied from the top level DIE in the "main"
542 (or "stub") file in preparation for reading the DWO file
543 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
544 Either there isn't a DWO file (in which case this is NULL and the point
545 is moot), or there is and either we're not going to read it (in which
546 case this is NULL) or there is and we are reading it (in which case this
548 struct dwo_unit
*dwo_unit
= nullptr;
550 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
551 Note this value comes from the Fission stub CU/TU's DIE. */
552 gdb::optional
<ULONGEST
> addr_base
;
554 /* The DW_AT_rnglists_base attribute if present.
555 Note this value comes from the Fission stub CU/TU's DIE.
556 Also note that the value is zero in the non-DWO case so this value can
557 be used without needing to know whether DWO files are in use or not.
558 N.B. This does not apply to DW_AT_ranges appearing in
559 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
560 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
561 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
562 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
563 ULONGEST ranges_base
= 0;
565 /* The DW_AT_loclists_base attribute if present. */
566 ULONGEST loclist_base
= 0;
568 /* When reading debug info generated by older versions of rustc, we
569 have to rewrite some union types to be struct types with a
570 variant part. This rewriting must be done after the CU is fully
571 read in, because otherwise at the point of rewriting some struct
572 type might not have been fully processed. So, we keep a list of
573 all such types here and process them after expansion. */
574 std::vector
<struct type
*> rust_unions
;
576 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
577 files, the value is implicitly zero. For DWARF 5 version DWO files, the
578 value is often implicit and is the size of the header of
579 .debug_str_offsets section (8 or 4, depending on the address size). */
580 gdb::optional
<ULONGEST
> str_offsets_base
;
582 /* Mark used when releasing cached dies. */
585 /* This CU references .debug_loc. See the symtab->locations_valid field.
586 This test is imperfect as there may exist optimized debug code not using
587 any location list and still facing inlining issues if handled as
588 unoptimized code. For a future better test see GCC PR other/32998. */
589 bool has_loclist
: 1;
591 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
592 if all the producer_is_* fields are valid. This information is cached
593 because profiling CU expansion showed excessive time spent in
594 producer_is_gxx_lt_4_6. */
595 bool checked_producer
: 1;
596 bool producer_is_gxx_lt_4_6
: 1;
597 bool producer_is_gcc_lt_4_3
: 1;
598 bool producer_is_icc
: 1;
599 bool producer_is_icc_lt_14
: 1;
600 bool producer_is_codewarrior
: 1;
602 /* When true, the file that we're processing is known to have
603 debugging info for C++ namespaces. GCC 3.3.x did not produce
604 this information, but later versions do. */
606 bool processing_has_namespace_info
: 1;
608 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
610 /* If this CU was inherited by another CU (via specification,
611 abstract_origin, etc), this is the ancestor CU. */
614 /* Get the buildsym_compunit for this CU. */
615 buildsym_compunit
*get_builder ()
617 /* If this CU has a builder associated with it, use that. */
618 if (m_builder
!= nullptr)
619 return m_builder
.get ();
621 /* Otherwise, search ancestors for a valid builder. */
622 if (ancestor
!= nullptr)
623 return ancestor
->get_builder ();
629 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
630 This includes type_unit_group and quick_file_names. */
632 struct stmt_list_hash
634 /* The DWO unit this table is from or NULL if there is none. */
635 struct dwo_unit
*dwo_unit
;
637 /* Offset in .debug_line or .debug_line.dwo. */
638 sect_offset line_sect_off
;
641 /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to
642 an object of this type. This contains elements of type unit groups
643 that can be shared across objfiles. The non-shareable parts are in
644 type_unit_group_unshareable. */
646 struct type_unit_group
648 /* dwarf2read.c's main "handle" on a TU symtab.
649 To simplify things we create an artificial CU that "includes" all the
650 type units using this stmt_list so that the rest of the code still has
651 a "per_cu" handle on the symtab. */
652 struct dwarf2_per_cu_data per_cu
;
654 /* The TUs that share this DW_AT_stmt_list entry.
655 This is added to while parsing type units to build partial symtabs,
656 and is deleted afterwards and not used again. */
657 std::vector
<signatured_type
*> *tus
;
659 /* The data used to construct the hash key. */
660 struct stmt_list_hash hash
;
663 /* These sections are what may appear in a (real or virtual) DWO file. */
667 struct dwarf2_section_info abbrev
;
668 struct dwarf2_section_info line
;
669 struct dwarf2_section_info loc
;
670 struct dwarf2_section_info loclists
;
671 struct dwarf2_section_info macinfo
;
672 struct dwarf2_section_info macro
;
673 struct dwarf2_section_info rnglists
;
674 struct dwarf2_section_info str
;
675 struct dwarf2_section_info str_offsets
;
676 /* In the case of a virtual DWO file, these two are unused. */
677 struct dwarf2_section_info info
;
678 std::vector
<dwarf2_section_info
> types
;
681 /* CUs/TUs in DWP/DWO files. */
685 /* Backlink to the containing struct dwo_file. */
686 struct dwo_file
*dwo_file
;
688 /* The "id" that distinguishes this CU/TU.
689 .debug_info calls this "dwo_id", .debug_types calls this "signature".
690 Since signatures came first, we stick with it for consistency. */
693 /* The section this CU/TU lives in, in the DWO file. */
694 struct dwarf2_section_info
*section
;
696 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
697 sect_offset sect_off
;
700 /* For types, offset in the type's DIE of the type defined by this TU. */
701 cu_offset type_offset_in_tu
;
704 /* include/dwarf2.h defines the DWP section codes.
705 It defines a max value but it doesn't define a min value, which we
706 use for error checking, so provide one. */
708 enum dwp_v2_section_ids
713 /* Data for one DWO file.
715 This includes virtual DWO files (a virtual DWO file is a DWO file as it
716 appears in a DWP file). DWP files don't really have DWO files per se -
717 comdat folding of types "loses" the DWO file they came from, and from
718 a high level view DWP files appear to contain a mass of random types.
719 However, to maintain consistency with the non-DWP case we pretend DWP
720 files contain virtual DWO files, and we assign each TU with one virtual
721 DWO file (generally based on the line and abbrev section offsets -
722 a heuristic that seems to work in practice). */
726 dwo_file () = default;
727 DISABLE_COPY_AND_ASSIGN (dwo_file
);
729 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
730 For virtual DWO files the name is constructed from the section offsets
731 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
732 from related CU+TUs. */
733 const char *dwo_name
= nullptr;
735 /* The DW_AT_comp_dir attribute. */
736 const char *comp_dir
= nullptr;
738 /* The bfd, when the file is open. Otherwise this is NULL.
739 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
740 gdb_bfd_ref_ptr dbfd
;
742 /* The sections that make up this DWO file.
743 Remember that for virtual DWO files in DWP V2 or DWP V5, these are virtual
744 sections (for lack of a better name). */
745 struct dwo_sections sections
{};
747 /* The CUs in the file.
748 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
749 an extension to handle LLVM's Link Time Optimization output (where
750 multiple source files may be compiled into a single object/dwo pair). */
753 /* Table of TUs in the file.
754 Each element is a struct dwo_unit. */
758 /* These sections are what may appear in a DWP file. */
762 /* These are used by all DWP versions (1, 2 and 5). */
763 struct dwarf2_section_info str
;
764 struct dwarf2_section_info cu_index
;
765 struct dwarf2_section_info tu_index
;
767 /* These are only used by DWP version 2 and version 5 files.
768 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
769 sections are referenced by section number, and are not recorded here.
770 In DWP version 2 or 5 there is at most one copy of all these sections,
771 each section being (effectively) comprised of the concatenation of all of
772 the individual sections that exist in the version 1 format.
773 To keep the code simple we treat each of these concatenated pieces as a
774 section itself (a virtual section?). */
775 struct dwarf2_section_info abbrev
;
776 struct dwarf2_section_info info
;
777 struct dwarf2_section_info line
;
778 struct dwarf2_section_info loc
;
779 struct dwarf2_section_info loclists
;
780 struct dwarf2_section_info macinfo
;
781 struct dwarf2_section_info macro
;
782 struct dwarf2_section_info rnglists
;
783 struct dwarf2_section_info str_offsets
;
784 struct dwarf2_section_info types
;
787 /* These sections are what may appear in a virtual DWO file in DWP version 1.
788 A virtual DWO file is a DWO file as it appears in a DWP file. */
790 struct virtual_v1_dwo_sections
792 struct dwarf2_section_info abbrev
;
793 struct dwarf2_section_info line
;
794 struct dwarf2_section_info loc
;
795 struct dwarf2_section_info macinfo
;
796 struct dwarf2_section_info macro
;
797 struct dwarf2_section_info str_offsets
;
798 /* Each DWP hash table entry records one CU or one TU.
799 That is recorded here, and copied to dwo_unit.section. */
800 struct dwarf2_section_info info_or_types
;
803 /* Similar to virtual_v1_dwo_sections, but for DWP version 2 or 5.
804 In version 2, the sections of the DWO files are concatenated together
805 and stored in one section of that name. Thus each ELF section contains
806 several "virtual" sections. */
808 struct virtual_v2_or_v5_dwo_sections
810 bfd_size_type abbrev_offset
;
811 bfd_size_type abbrev_size
;
813 bfd_size_type line_offset
;
814 bfd_size_type line_size
;
816 bfd_size_type loc_offset
;
817 bfd_size_type loc_size
;
819 bfd_size_type loclists_offset
;
820 bfd_size_type loclists_size
;
822 bfd_size_type macinfo_offset
;
823 bfd_size_type macinfo_size
;
825 bfd_size_type macro_offset
;
826 bfd_size_type macro_size
;
828 bfd_size_type rnglists_offset
;
829 bfd_size_type rnglists_size
;
831 bfd_size_type str_offsets_offset
;
832 bfd_size_type str_offsets_size
;
834 /* Each DWP hash table entry records one CU or one TU.
835 That is recorded here, and copied to dwo_unit.section. */
836 bfd_size_type info_or_types_offset
;
837 bfd_size_type info_or_types_size
;
840 /* Contents of DWP hash tables. */
842 struct dwp_hash_table
844 uint32_t version
, nr_columns
;
845 uint32_t nr_units
, nr_slots
;
846 const gdb_byte
*hash_table
, *unit_table
;
851 const gdb_byte
*indices
;
855 /* This is indexed by column number and gives the id of the section
857 #define MAX_NR_V2_DWO_SECTIONS \
858 (1 /* .debug_info or .debug_types */ \
859 + 1 /* .debug_abbrev */ \
860 + 1 /* .debug_line */ \
861 + 1 /* .debug_loc */ \
862 + 1 /* .debug_str_offsets */ \
863 + 1 /* .debug_macro or .debug_macinfo */)
864 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
865 const gdb_byte
*offsets
;
866 const gdb_byte
*sizes
;
870 /* This is indexed by column number and gives the id of the section
872 #define MAX_NR_V5_DWO_SECTIONS \
873 (1 /* .debug_info */ \
874 + 1 /* .debug_abbrev */ \
875 + 1 /* .debug_line */ \
876 + 1 /* .debug_loclists */ \
877 + 1 /* .debug_str_offsets */ \
878 + 1 /* .debug_macro */ \
879 + 1 /* .debug_rnglists */)
880 int section_ids
[MAX_NR_V5_DWO_SECTIONS
];
881 const gdb_byte
*offsets
;
882 const gdb_byte
*sizes
;
887 /* Data for one DWP file. */
891 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
893 dbfd (std::move (abfd
))
897 /* Name of the file. */
900 /* File format version. */
904 gdb_bfd_ref_ptr dbfd
;
906 /* Section info for this file. */
907 struct dwp_sections sections
{};
909 /* Table of CUs in the file. */
910 const struct dwp_hash_table
*cus
= nullptr;
912 /* Table of TUs in the file. */
913 const struct dwp_hash_table
*tus
= nullptr;
915 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
919 /* Table to map ELF section numbers to their sections.
920 This is only needed for the DWP V1 file format. */
921 unsigned int num_sections
= 0;
922 asection
**elf_sections
= nullptr;
925 /* Struct used to pass misc. parameters to read_die_and_children, et
926 al. which are used for both .debug_info and .debug_types dies.
927 All parameters here are unchanging for the life of the call. This
928 struct exists to abstract away the constant parameters of die reading. */
930 struct die_reader_specs
932 /* The bfd of die_section. */
935 /* The CU of the DIE we are parsing. */
936 struct dwarf2_cu
*cu
;
938 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
939 struct dwo_file
*dwo_file
;
941 /* The section the die comes from.
942 This is either .debug_info or .debug_types, or the .dwo variants. */
943 struct dwarf2_section_info
*die_section
;
945 /* die_section->buffer. */
946 const gdb_byte
*buffer
;
948 /* The end of the buffer. */
949 const gdb_byte
*buffer_end
;
951 /* The abbreviation table to use when reading the DIEs. */
952 struct abbrev_table
*abbrev_table
;
955 /* A subclass of die_reader_specs that holds storage and has complex
956 constructor and destructor behavior. */
958 class cutu_reader
: public die_reader_specs
962 cutu_reader (dwarf2_per_cu_data
*this_cu
,
963 dwarf2_per_objfile
*per_objfile
,
964 struct abbrev_table
*abbrev_table
,
965 dwarf2_cu
*existing_cu
,
968 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
969 dwarf2_per_objfile
*per_objfile
,
970 struct dwarf2_cu
*parent_cu
= nullptr,
971 struct dwo_file
*dwo_file
= nullptr);
973 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
975 const gdb_byte
*info_ptr
= nullptr;
976 struct die_info
*comp_unit_die
= nullptr;
977 bool dummy_p
= false;
979 /* Release the new CU, putting it on the chain. This cannot be done
984 void init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
985 dwarf2_per_objfile
*per_objfile
,
986 dwarf2_cu
*existing_cu
);
988 struct dwarf2_per_cu_data
*m_this_cu
;
989 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
991 /* The ordinary abbreviation table. */
992 abbrev_table_up m_abbrev_table_holder
;
994 /* The DWO abbreviation table. */
995 abbrev_table_up m_dwo_abbrev_table
;
998 /* When we construct a partial symbol table entry we only
999 need this much information. */
1000 struct partial_die_info
: public allocate_on_obstack
1002 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1004 /* Disable assign but still keep copy ctor, which is needed
1005 load_partial_dies. */
1006 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1008 /* Adjust the partial die before generating a symbol for it. This
1009 function may set the is_external flag or change the DIE's
1011 void fixup (struct dwarf2_cu
*cu
);
1013 /* Read a minimal amount of information into the minimal die
1015 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1016 const struct abbrev_info
&abbrev
,
1017 const gdb_byte
*info_ptr
);
1019 /* Compute the name of this partial DIE. This memoizes the
1020 result, so it is safe to call multiple times. */
1021 const char *name (dwarf2_cu
*cu
);
1023 /* Offset of this DIE. */
1024 const sect_offset sect_off
;
1026 /* DWARF-2 tag for this DIE. */
1027 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1029 /* Assorted flags describing the data found in this DIE. */
1030 const unsigned int has_children
: 1;
1032 unsigned int is_external
: 1;
1033 unsigned int is_declaration
: 1;
1034 unsigned int has_type
: 1;
1035 unsigned int has_specification
: 1;
1036 unsigned int has_pc_info
: 1;
1037 unsigned int may_be_inlined
: 1;
1039 /* This DIE has been marked DW_AT_main_subprogram. */
1040 unsigned int main_subprogram
: 1;
1042 /* Flag set if the SCOPE field of this structure has been
1044 unsigned int scope_set
: 1;
1046 /* Flag set if the DIE has a byte_size attribute. */
1047 unsigned int has_byte_size
: 1;
1049 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1050 unsigned int has_const_value
: 1;
1052 /* Flag set if any of the DIE's children are template arguments. */
1053 unsigned int has_template_arguments
: 1;
1055 /* Flag set if fixup has been called on this die. */
1056 unsigned int fixup_called
: 1;
1058 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1059 unsigned int is_dwz
: 1;
1061 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1062 unsigned int spec_is_dwz
: 1;
1064 unsigned int canonical_name
: 1;
1066 /* The name of this DIE. Normally the value of DW_AT_name, but
1067 sometimes a default name for unnamed DIEs. */
1068 const char *raw_name
= nullptr;
1070 /* The linkage name, if present. */
1071 const char *linkage_name
= nullptr;
1073 /* The scope to prepend to our children. This is generally
1074 allocated on the comp_unit_obstack, so will disappear
1075 when this compilation unit leaves the cache. */
1076 const char *scope
= nullptr;
1078 /* Some data associated with the partial DIE. The tag determines
1079 which field is live. */
1082 /* The location description associated with this DIE, if any. */
1083 struct dwarf_block
*locdesc
;
1084 /* The offset of an import, for DW_TAG_imported_unit. */
1085 sect_offset sect_off
;
1088 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1089 CORE_ADDR lowpc
= 0;
1090 CORE_ADDR highpc
= 0;
1092 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1093 DW_AT_sibling, if any. */
1094 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1095 could return DW_AT_sibling values to its caller load_partial_dies. */
1096 const gdb_byte
*sibling
= nullptr;
1098 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1099 DW_AT_specification (or DW_AT_abstract_origin or
1100 DW_AT_extension). */
1101 sect_offset spec_offset
{};
1103 /* Pointers to this DIE's parent, first child, and next sibling,
1105 struct partial_die_info
*die_parent
= nullptr;
1106 struct partial_die_info
*die_child
= nullptr;
1107 struct partial_die_info
*die_sibling
= nullptr;
1109 friend struct partial_die_info
*
1110 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1113 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1114 partial_die_info (sect_offset sect_off
)
1115 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1119 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1121 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1126 has_specification
= 0;
1129 main_subprogram
= 0;
1132 has_const_value
= 0;
1133 has_template_arguments
= 0;
1141 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1142 but this would require a corresponding change in unpack_field_as_long
1144 static int bits_per_byte
= 8;
1146 struct variant_part_builder
;
1148 /* When reading a variant, we track a bit more information about the
1149 field, and store it in an object of this type. */
1151 struct variant_field
1153 int first_field
= -1;
1154 int last_field
= -1;
1156 /* A variant can contain other variant parts. */
1157 std::vector
<variant_part_builder
> variant_parts
;
1159 /* If we see a DW_TAG_variant, then this will be set if this is the
1161 bool default_branch
= false;
1162 /* If we see a DW_AT_discr_value, then this will be the discriminant
1164 ULONGEST discriminant_value
= 0;
1165 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1167 struct dwarf_block
*discr_list_data
= nullptr;
1170 /* This represents a DW_TAG_variant_part. */
1172 struct variant_part_builder
1174 /* The offset of the discriminant field. */
1175 sect_offset discriminant_offset
{};
1177 /* Variants that are direct children of this variant part. */
1178 std::vector
<variant_field
> variants
;
1180 /* True if we're currently reading a variant. */
1181 bool processing_variant
= false;
1186 int accessibility
= 0;
1188 /* Variant parts need to find the discriminant, which is a DIE
1189 reference. We track the section offset of each field to make
1192 struct field field
{};
1197 const char *name
= nullptr;
1198 std::vector
<struct fn_field
> fnfields
;
1201 /* The routines that read and process dies for a C struct or C++ class
1202 pass lists of data member fields and lists of member function fields
1203 in an instance of a field_info structure, as defined below. */
1206 /* List of data member and baseclasses fields. */
1207 std::vector
<struct nextfield
> fields
;
1208 std::vector
<struct nextfield
> baseclasses
;
1210 /* Set if the accessibility of one of the fields is not public. */
1211 bool non_public_fields
= false;
1213 /* Member function fieldlist array, contains name of possibly overloaded
1214 member function, number of overloaded member functions and a pointer
1215 to the head of the member function field chain. */
1216 std::vector
<struct fnfieldlist
> fnfieldlists
;
1218 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1219 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1220 std::vector
<struct decl_field
> typedef_field_list
;
1222 /* Nested types defined by this class and the number of elements in this
1224 std::vector
<struct decl_field
> nested_types_list
;
1226 /* If non-null, this is the variant part we are currently
1228 variant_part_builder
*current_variant_part
= nullptr;
1229 /* This holds all the top-level variant parts attached to the type
1231 std::vector
<variant_part_builder
> variant_parts
;
1233 /* Return the total number of fields (including baseclasses). */
1234 int nfields () const
1236 return fields
.size () + baseclasses
.size ();
1240 /* Loaded secondary compilation units are kept in memory until they
1241 have not been referenced for the processing of this many
1242 compilation units. Set this to zero to disable caching. Cache
1243 sizes of up to at least twenty will improve startup time for
1244 typical inter-CU-reference binaries, at an obvious memory cost. */
1245 static int dwarf_max_cache_age
= 5;
1247 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1248 struct cmd_list_element
*c
, const char *value
)
1250 fprintf_filtered (file
, _("The upper bound on the age of cached "
1251 "DWARF compilation units is %s.\n"),
1255 /* local function prototypes */
1257 static void dwarf2_find_base_address (struct die_info
*die
,
1258 struct dwarf2_cu
*cu
);
1260 static dwarf2_psymtab
*create_partial_symtab
1261 (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
1264 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1265 const gdb_byte
*info_ptr
,
1266 struct die_info
*type_unit_die
);
1268 static void dwarf2_build_psymtabs_hard (dwarf2_per_objfile
*per_objfile
);
1270 static void scan_partial_symbols (struct partial_die_info
*,
1271 CORE_ADDR
*, CORE_ADDR
*,
1272 int, struct dwarf2_cu
*);
1274 static void add_partial_symbol (struct partial_die_info
*,
1275 struct dwarf2_cu
*);
1277 static void add_partial_namespace (struct partial_die_info
*pdi
,
1278 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1279 int set_addrmap
, struct dwarf2_cu
*cu
);
1281 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1282 CORE_ADDR
*highpc
, int set_addrmap
,
1283 struct dwarf2_cu
*cu
);
1285 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1286 struct dwarf2_cu
*cu
);
1288 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1289 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1290 int need_pc
, struct dwarf2_cu
*cu
);
1292 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1294 static struct partial_die_info
*load_partial_dies
1295 (const struct die_reader_specs
*, const gdb_byte
*, int);
1297 /* A pair of partial_die_info and compilation unit. */
1298 struct cu_partial_die_info
1300 /* The compilation unit of the partial_die_info. */
1301 struct dwarf2_cu
*cu
;
1302 /* A partial_die_info. */
1303 struct partial_die_info
*pdi
;
1305 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1311 cu_partial_die_info () = delete;
1314 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1315 struct dwarf2_cu
*);
1317 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1318 struct attribute
*, struct attr_abbrev
*,
1321 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1322 struct attribute
*attr
, dwarf_tag tag
);
1324 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1326 static sect_offset
read_abbrev_offset (dwarf2_per_objfile
*per_objfile
,
1327 dwarf2_section_info
*, sect_offset
);
1329 static const char *read_indirect_string
1330 (dwarf2_per_objfile
*per_objfile
, bfd
*, const gdb_byte
*,
1331 const struct comp_unit_head
*, unsigned int *);
1333 static const char *read_indirect_string_at_offset
1334 (dwarf2_per_objfile
*per_objfile
, LONGEST str_offset
);
1336 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1340 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1341 ULONGEST str_index
);
1343 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1344 ULONGEST str_index
);
1346 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1348 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1349 struct dwarf2_cu
*);
1351 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1352 struct dwarf2_cu
*cu
);
1354 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1356 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1357 struct dwarf2_cu
*cu
);
1359 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1361 static struct die_info
*die_specification (struct die_info
*die
,
1362 struct dwarf2_cu
**);
1364 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1365 struct dwarf2_cu
*cu
);
1367 static void dwarf_decode_lines (struct line_header
*, const char *,
1368 struct dwarf2_cu
*, dwarf2_psymtab
*,
1369 CORE_ADDR
, int decode_mapping
);
1371 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1374 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1375 struct dwarf2_cu
*, struct symbol
* = NULL
);
1377 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1378 struct dwarf2_cu
*);
1380 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1383 struct obstack
*obstack
,
1384 struct dwarf2_cu
*cu
, LONGEST
*value
,
1385 const gdb_byte
**bytes
,
1386 struct dwarf2_locexpr_baton
**baton
);
1388 static struct type
*read_subrange_index_type (struct die_info
*die
,
1389 struct dwarf2_cu
*cu
);
1391 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1393 static int need_gnat_info (struct dwarf2_cu
*);
1395 static struct type
*die_descriptive_type (struct die_info
*,
1396 struct dwarf2_cu
*);
1398 static void set_descriptive_type (struct type
*, struct die_info
*,
1399 struct dwarf2_cu
*);
1401 static struct type
*die_containing_type (struct die_info
*,
1402 struct dwarf2_cu
*);
1404 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1405 struct dwarf2_cu
*);
1407 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1409 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1411 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1413 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1414 const char *suffix
, int physname
,
1415 struct dwarf2_cu
*cu
);
1417 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1419 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1421 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1423 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1425 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1427 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1429 /* Return the .debug_loclists section to use for cu. */
1430 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1432 /* Return the .debug_rnglists section to use for cu. */
1433 static struct dwarf2_section_info
*cu_debug_rnglists_section
1434 (struct dwarf2_cu
*cu
, dwarf_tag tag
);
1436 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1437 values. Keep the items ordered with increasing constraints compliance. */
1440 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1441 PC_BOUNDS_NOT_PRESENT
,
1443 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1444 were present but they do not form a valid range of PC addresses. */
1447 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1450 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1454 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1455 CORE_ADDR
*, CORE_ADDR
*,
1459 static void get_scope_pc_bounds (struct die_info
*,
1460 CORE_ADDR
*, CORE_ADDR
*,
1461 struct dwarf2_cu
*);
1463 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1464 CORE_ADDR
, struct dwarf2_cu
*);
1466 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1467 struct dwarf2_cu
*);
1469 static void dwarf2_attach_fields_to_type (struct field_info
*,
1470 struct type
*, struct dwarf2_cu
*);
1472 static void dwarf2_add_member_fn (struct field_info
*,
1473 struct die_info
*, struct type
*,
1474 struct dwarf2_cu
*);
1476 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1478 struct dwarf2_cu
*);
1480 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1482 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1484 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1486 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1488 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1490 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1492 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1494 static struct type
*read_module_type (struct die_info
*die
,
1495 struct dwarf2_cu
*cu
);
1497 static const char *namespace_name (struct die_info
*die
,
1498 int *is_anonymous
, struct dwarf2_cu
*);
1500 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1502 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1505 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1506 struct dwarf2_cu
*);
1508 static struct die_info
*read_die_and_siblings_1
1509 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1512 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1513 const gdb_byte
*info_ptr
,
1514 const gdb_byte
**new_info_ptr
,
1515 struct die_info
*parent
);
1517 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1518 struct die_info
**, const gdb_byte
*,
1521 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1522 struct die_info
**, const gdb_byte
*);
1524 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1526 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1529 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1531 static const char *dwarf2_full_name (const char *name
,
1532 struct die_info
*die
,
1533 struct dwarf2_cu
*cu
);
1535 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1536 struct dwarf2_cu
*cu
);
1538 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1539 struct dwarf2_cu
**);
1541 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1543 static void dump_die_for_error (struct die_info
*);
1545 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1548 /*static*/ void dump_die (struct die_info
*, int max_level
);
1550 static void store_in_ref_table (struct die_info
*,
1551 struct dwarf2_cu
*);
1553 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1554 const struct attribute
*,
1555 struct dwarf2_cu
**);
1557 static struct die_info
*follow_die_ref (struct die_info
*,
1558 const struct attribute
*,
1559 struct dwarf2_cu
**);
1561 static struct die_info
*follow_die_sig (struct die_info
*,
1562 const struct attribute
*,
1563 struct dwarf2_cu
**);
1565 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1566 struct dwarf2_cu
*);
1568 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1569 const struct attribute
*,
1570 struct dwarf2_cu
*);
1572 static void load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
1573 dwarf2_per_objfile
*per_objfile
);
1575 static void read_signatured_type (signatured_type
*sig_type
,
1576 dwarf2_per_objfile
*per_objfile
);
1578 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1579 struct die_info
*die
, struct dwarf2_cu
*cu
,
1580 struct dynamic_prop
*prop
, struct type
*type
);
1582 /* memory allocation interface */
1584 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1586 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1588 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1590 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1591 struct dwarf2_loclist_baton
*baton
,
1592 const struct attribute
*attr
);
1594 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1596 struct dwarf2_cu
*cu
,
1599 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1600 const gdb_byte
*info_ptr
,
1601 struct abbrev_info
*abbrev
);
1603 static hashval_t
partial_die_hash (const void *item
);
1605 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1607 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1608 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1609 dwarf2_per_objfile
*per_objfile
);
1611 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1612 struct die_info
*comp_unit_die
,
1613 enum language pretend_language
);
1615 static struct type
*set_die_type (struct die_info
*, struct type
*,
1616 struct dwarf2_cu
*, bool = false);
1618 static void create_all_comp_units (dwarf2_per_objfile
*per_objfile
);
1620 static int create_all_type_units (dwarf2_per_objfile
*per_objfile
);
1622 static void load_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
1623 dwarf2_per_objfile
*per_objfile
,
1624 dwarf2_cu
*existing_cu
,
1626 enum language pretend_language
);
1628 static void process_full_comp_unit (dwarf2_cu
*cu
,
1629 enum language pretend_language
);
1631 static void process_full_type_unit (dwarf2_cu
*cu
,
1632 enum language pretend_language
);
1634 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1635 struct dwarf2_per_cu_data
*);
1637 static void dwarf2_mark (struct dwarf2_cu
*);
1639 static struct type
*get_die_type_at_offset (sect_offset
,
1640 dwarf2_per_cu_data
*per_cu
,
1641 dwarf2_per_objfile
*per_objfile
);
1643 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1645 static void queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
1646 dwarf2_per_objfile
*per_objfile
,
1647 enum language pretend_language
);
1649 static void process_queue (dwarf2_per_objfile
*per_objfile
);
1651 /* Class, the destructor of which frees all allocated queue entries. This
1652 will only have work to do if an error was thrown while processing the
1653 dwarf. If no error was thrown then the queue entries should have all
1654 been processed, and freed, as we went along. */
1656 class dwarf2_queue_guard
1659 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1660 : m_per_objfile (per_objfile
)
1664 /* Free any entries remaining on the queue. There should only be
1665 entries left if we hit an error while processing the dwarf. */
1666 ~dwarf2_queue_guard ()
1668 /* Ensure that no memory is allocated by the queue. */
1669 std::queue
<dwarf2_queue_item
> empty
;
1670 std::swap (m_per_objfile
->per_bfd
->queue
, empty
);
1673 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1676 dwarf2_per_objfile
*m_per_objfile
;
1679 dwarf2_queue_item::~dwarf2_queue_item ()
1681 /* Anything still marked queued is likely to be in an
1682 inconsistent state, so discard it. */
1685 per_objfile
->remove_cu (per_cu
);
1690 /* The return type of find_file_and_directory. Note, the enclosed
1691 string pointers are only valid while this object is valid. */
1693 struct file_and_directory
1695 /* The filename. This is never NULL. */
1698 /* The compilation directory. NULL if not known. If we needed to
1699 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1700 points directly to the DW_AT_comp_dir string attribute owned by
1701 the obstack that owns the DIE. */
1702 const char *comp_dir
;
1704 /* If we needed to build a new string for comp_dir, this is what
1705 owns the storage. */
1706 std::string comp_dir_storage
;
1709 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1710 struct dwarf2_cu
*cu
);
1712 static htab_up
allocate_signatured_type_table ();
1714 static htab_up
allocate_dwo_unit_table ();
1716 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1717 (dwarf2_per_objfile
*per_objfile
, struct dwp_file
*dwp_file
,
1718 const char *comp_dir
, ULONGEST signature
, int is_debug_types
);
1720 static struct dwp_file
*get_dwp_file (dwarf2_per_objfile
*per_objfile
);
1722 static struct dwo_unit
*lookup_dwo_comp_unit
1723 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
1724 ULONGEST signature
);
1726 static struct dwo_unit
*lookup_dwo_type_unit
1727 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
);
1729 static void queue_and_load_all_dwo_tus (dwarf2_cu
*cu
);
1731 /* A unique pointer to a dwo_file. */
1733 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1735 static void process_cu_includes (dwarf2_per_objfile
*per_objfile
);
1737 static void check_producer (struct dwarf2_cu
*cu
);
1739 static void free_line_header_voidp (void *arg
);
1741 /* Various complaints about symbol reading that don't abort the process. */
1744 dwarf2_debug_line_missing_file_complaint (void)
1746 complaint (_(".debug_line section has line data without a file"));
1750 dwarf2_debug_line_missing_end_sequence_complaint (void)
1752 complaint (_(".debug_line section has line "
1753 "program sequence without an end"));
1757 dwarf2_complex_location_expr_complaint (void)
1759 complaint (_("location expression too complex"));
1763 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1766 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1771 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1773 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1777 /* Hash function for line_header_hash. */
1780 line_header_hash (const struct line_header
*ofs
)
1782 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1785 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1788 line_header_hash_voidp (const void *item
)
1790 const struct line_header
*ofs
= (const struct line_header
*) item
;
1792 return line_header_hash (ofs
);
1795 /* Equality function for line_header_hash. */
1798 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1800 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1801 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1803 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1804 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1809 /* See declaration. */
1811 dwarf2_per_bfd::dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
,
1814 can_copy (can_copy_
)
1817 names
= &dwarf2_elf_names
;
1819 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1820 locate_sections (obfd
, sec
, *names
);
1823 dwarf2_per_bfd::~dwarf2_per_bfd ()
1825 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1826 per_cu
->imported_symtabs_free ();
1828 for (signatured_type
*sig_type
: all_type_units
)
1829 sig_type
->per_cu
.imported_symtabs_free ();
1831 /* Everything else should be on this->obstack. */
1837 dwarf2_per_objfile::remove_all_cus ()
1839 for (auto pair
: m_dwarf2_cus
)
1842 m_dwarf2_cus
.clear ();
1845 /* A helper class that calls free_cached_comp_units on
1848 class free_cached_comp_units
1852 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1853 : m_per_objfile (per_objfile
)
1857 ~free_cached_comp_units ()
1859 m_per_objfile
->remove_all_cus ();
1862 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1866 dwarf2_per_objfile
*m_per_objfile
;
1872 dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data
*per_cu
) const
1874 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1876 return this->m_symtabs
[per_cu
->index
] != nullptr;
1882 dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data
*per_cu
) const
1884 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1886 return this->m_symtabs
[per_cu
->index
];
1892 dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data
*per_cu
,
1893 compunit_symtab
*symtab
)
1895 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1896 gdb_assert (this->m_symtabs
[per_cu
->index
] == nullptr);
1898 this->m_symtabs
[per_cu
->index
] = symtab
;
1901 /* Try to locate the sections we need for DWARF 2 debugging
1902 information and return true if we have enough to do something.
1903 NAMES points to the dwarf2 section names, or is NULL if the standard
1904 ELF names are used. CAN_COPY is true for formats where symbol
1905 interposition is possible and so symbol values must follow copy
1906 relocation rules. */
1909 dwarf2_has_info (struct objfile
*objfile
,
1910 const struct dwarf2_debug_sections
*names
,
1913 if (objfile
->flags
& OBJF_READNEVER
)
1916 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
1918 if (per_objfile
== NULL
)
1920 dwarf2_per_bfd
*per_bfd
;
1922 /* We can share a "dwarf2_per_bfd" with other objfiles if the BFD
1923 doesn't require relocations and if there aren't partial symbols
1924 from some other reader. */
1925 if (!objfile_has_partial_symbols (objfile
)
1926 && !gdb_bfd_requires_relocations (objfile
->obfd
))
1928 /* See if one has been created for this BFD yet. */
1929 per_bfd
= dwarf2_per_bfd_bfd_data_key
.get (objfile
->obfd
);
1931 if (per_bfd
== nullptr)
1933 /* No, create it now. */
1934 per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1935 dwarf2_per_bfd_bfd_data_key
.set (objfile
->obfd
, per_bfd
);
1940 /* No sharing possible, create one specifically for this objfile. */
1941 per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1942 dwarf2_per_bfd_objfile_data_key
.set (objfile
, per_bfd
);
1945 per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
, per_bfd
);
1948 return (!per_objfile
->per_bfd
->info
.is_virtual
1949 && per_objfile
->per_bfd
->info
.s
.section
!= NULL
1950 && !per_objfile
->per_bfd
->abbrev
.is_virtual
1951 && per_objfile
->per_bfd
->abbrev
.s
.section
!= NULL
);
1954 /* When loading sections, we look either for uncompressed section or for
1955 compressed section names. */
1958 section_is_p (const char *section_name
,
1959 const struct dwarf2_section_names
*names
)
1961 if (names
->normal
!= NULL
1962 && strcmp (section_name
, names
->normal
) == 0)
1964 if (names
->compressed
!= NULL
1965 && strcmp (section_name
, names
->compressed
) == 0)
1970 /* See declaration. */
1973 dwarf2_per_bfd::locate_sections (bfd
*abfd
, asection
*sectp
,
1974 const dwarf2_debug_sections
&names
)
1976 flagword aflag
= bfd_section_flags (sectp
);
1978 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1981 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1982 > bfd_get_file_size (abfd
))
1984 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1985 warning (_("Discarding section %s which has a section size (%s"
1986 ") larger than the file size [in module %s]"),
1987 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1988 bfd_get_filename (abfd
));
1990 else if (section_is_p (sectp
->name
, &names
.info
))
1992 this->info
.s
.section
= sectp
;
1993 this->info
.size
= bfd_section_size (sectp
);
1995 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1997 this->abbrev
.s
.section
= sectp
;
1998 this->abbrev
.size
= bfd_section_size (sectp
);
2000 else if (section_is_p (sectp
->name
, &names
.line
))
2002 this->line
.s
.section
= sectp
;
2003 this->line
.size
= bfd_section_size (sectp
);
2005 else if (section_is_p (sectp
->name
, &names
.loc
))
2007 this->loc
.s
.section
= sectp
;
2008 this->loc
.size
= bfd_section_size (sectp
);
2010 else if (section_is_p (sectp
->name
, &names
.loclists
))
2012 this->loclists
.s
.section
= sectp
;
2013 this->loclists
.size
= bfd_section_size (sectp
);
2015 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2017 this->macinfo
.s
.section
= sectp
;
2018 this->macinfo
.size
= bfd_section_size (sectp
);
2020 else if (section_is_p (sectp
->name
, &names
.macro
))
2022 this->macro
.s
.section
= sectp
;
2023 this->macro
.size
= bfd_section_size (sectp
);
2025 else if (section_is_p (sectp
->name
, &names
.str
))
2027 this->str
.s
.section
= sectp
;
2028 this->str
.size
= bfd_section_size (sectp
);
2030 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
2032 this->str_offsets
.s
.section
= sectp
;
2033 this->str_offsets
.size
= bfd_section_size (sectp
);
2035 else if (section_is_p (sectp
->name
, &names
.line_str
))
2037 this->line_str
.s
.section
= sectp
;
2038 this->line_str
.size
= bfd_section_size (sectp
);
2040 else if (section_is_p (sectp
->name
, &names
.addr
))
2042 this->addr
.s
.section
= sectp
;
2043 this->addr
.size
= bfd_section_size (sectp
);
2045 else if (section_is_p (sectp
->name
, &names
.frame
))
2047 this->frame
.s
.section
= sectp
;
2048 this->frame
.size
= bfd_section_size (sectp
);
2050 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2052 this->eh_frame
.s
.section
= sectp
;
2053 this->eh_frame
.size
= bfd_section_size (sectp
);
2055 else if (section_is_p (sectp
->name
, &names
.ranges
))
2057 this->ranges
.s
.section
= sectp
;
2058 this->ranges
.size
= bfd_section_size (sectp
);
2060 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2062 this->rnglists
.s
.section
= sectp
;
2063 this->rnglists
.size
= bfd_section_size (sectp
);
2065 else if (section_is_p (sectp
->name
, &names
.types
))
2067 struct dwarf2_section_info type_section
;
2069 memset (&type_section
, 0, sizeof (type_section
));
2070 type_section
.s
.section
= sectp
;
2071 type_section
.size
= bfd_section_size (sectp
);
2073 this->types
.push_back (type_section
);
2075 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2077 this->gdb_index
.s
.section
= sectp
;
2078 this->gdb_index
.size
= bfd_section_size (sectp
);
2080 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2082 this->debug_names
.s
.section
= sectp
;
2083 this->debug_names
.size
= bfd_section_size (sectp
);
2085 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2087 this->debug_aranges
.s
.section
= sectp
;
2088 this->debug_aranges
.size
= bfd_section_size (sectp
);
2091 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2092 && bfd_section_vma (sectp
) == 0)
2093 this->has_section_at_zero
= true;
2096 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2100 dwarf2_get_section_info (struct objfile
*objfile
,
2101 enum dwarf2_section_enum sect
,
2102 asection
**sectp
, const gdb_byte
**bufp
,
2103 bfd_size_type
*sizep
)
2105 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
2106 struct dwarf2_section_info
*info
;
2108 /* We may see an objfile without any DWARF, in which case we just
2110 if (per_objfile
== NULL
)
2119 case DWARF2_DEBUG_FRAME
:
2120 info
= &per_objfile
->per_bfd
->frame
;
2122 case DWARF2_EH_FRAME
:
2123 info
= &per_objfile
->per_bfd
->eh_frame
;
2126 gdb_assert_not_reached ("unexpected section");
2129 info
->read (objfile
);
2131 *sectp
= info
->get_bfd_section ();
2132 *bufp
= info
->buffer
;
2133 *sizep
= info
->size
;
2136 /* A helper function to find the sections for a .dwz file. */
2139 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, dwz_file
*dwz_file
)
2141 /* Note that we only support the standard ELF names, because .dwz
2142 is ELF-only (at the time of writing). */
2143 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2145 dwz_file
->abbrev
.s
.section
= sectp
;
2146 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2148 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2150 dwz_file
->info
.s
.section
= sectp
;
2151 dwz_file
->info
.size
= bfd_section_size (sectp
);
2153 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2155 dwz_file
->str
.s
.section
= sectp
;
2156 dwz_file
->str
.size
= bfd_section_size (sectp
);
2158 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2160 dwz_file
->line
.s
.section
= sectp
;
2161 dwz_file
->line
.size
= bfd_section_size (sectp
);
2163 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2165 dwz_file
->macro
.s
.section
= sectp
;
2166 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2168 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2170 dwz_file
->gdb_index
.s
.section
= sectp
;
2171 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2173 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2175 dwz_file
->debug_names
.s
.section
= sectp
;
2176 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2180 /* Attempt to find a .dwz file (whose full path is represented by
2181 FILENAME) in all of the specified debug file directories provided.
2183 Return the equivalent gdb_bfd_ref_ptr of the .dwz file found, or
2184 nullptr if it could not find anything. */
2186 static gdb_bfd_ref_ptr
2187 dwz_search_other_debugdirs (std::string
&filename
, bfd_byte
*buildid
,
2190 /* Let's assume that the path represented by FILENAME has the
2191 "/.dwz/" subpath in it. This is what (most) GNU/Linux
2192 distributions do, anyway. */
2193 size_t dwz_pos
= filename
.find ("/.dwz/");
2195 if (dwz_pos
== std::string::npos
)
2198 /* This is an obvious assertion, but it's here more to educate
2199 future readers of this code that FILENAME at DWZ_POS *must*
2200 contain a directory separator. */
2201 gdb_assert (IS_DIR_SEPARATOR (filename
[dwz_pos
]));
2203 gdb_bfd_ref_ptr dwz_bfd
;
2204 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
2205 = dirnames_to_char_ptr_vec (debug_file_directory
);
2207 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
2209 /* The idea is to iterate over the
2210 debug file directories provided by the user and
2211 replace the hard-coded path in the "filename" by each
2212 debug-file-directory.
2214 For example, suppose that filename is:
2216 /usr/lib/debug/.dwz/foo.dwz
2218 And suppose that we have "$HOME/bar" as the
2219 debug-file-directory. We would then adjust filename
2222 $HOME/bar/.dwz/foo.dwz
2224 which would hopefully allow us to find the alt debug
2226 std::string ddir
= debugdir
.get ();
2231 /* Make sure the current debug-file-directory ends with a
2232 directory separator. This is needed because, if FILENAME
2233 contains something like "/usr/lib/abcde/.dwz/foo.dwz" and
2234 DDIR is "/usr/lib/abc", then could wrongfully skip it
2236 if (!IS_DIR_SEPARATOR (ddir
.back ()))
2237 ddir
+= SLASH_STRING
;
2239 /* Check whether the beginning of FILENAME is DDIR. If it is,
2240 then we are dealing with a file which we already attempted to
2241 open before, so we just skip it and continue processing the
2242 remaining debug file directories. */
2243 if (filename
.size () > ddir
.size ()
2244 && filename
.compare (0, ddir
.size (), ddir
) == 0)
2247 /* Replace FILENAME's default debug-file-directory with
2249 std::string new_filename
= ddir
+ &filename
[dwz_pos
+ 1];
2251 dwz_bfd
= gdb_bfd_open (new_filename
.c_str (), gnutarget
);
2253 if (dwz_bfd
== nullptr)
2256 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2258 dwz_bfd
.reset (nullptr);
2269 /* See dwarf2read.h. */
2272 dwarf2_get_dwz_file (dwarf2_per_bfd
*per_bfd
)
2274 bfd_size_type buildid_len_arg
;
2278 if (per_bfd
->dwz_file
!= NULL
)
2279 return per_bfd
->dwz_file
.get ();
2281 bfd_set_error (bfd_error_no_error
);
2282 gdb::unique_xmalloc_ptr
<char> data
2283 (bfd_get_alt_debug_link_info (per_bfd
->obfd
,
2284 &buildid_len_arg
, &buildid
));
2287 if (bfd_get_error () == bfd_error_no_error
)
2289 error (_("could not read '.gnu_debugaltlink' section: %s"),
2290 bfd_errmsg (bfd_get_error ()));
2293 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2295 buildid_len
= (size_t) buildid_len_arg
;
2297 std::string filename
= data
.get ();
2299 if (!IS_ABSOLUTE_PATH (filename
.c_str ()))
2301 gdb::unique_xmalloc_ptr
<char> abs
2302 = gdb_realpath (bfd_get_filename (per_bfd
->obfd
));
2304 filename
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2307 /* First try the file name given in the section. If that doesn't
2308 work, try to use the build-id instead. */
2309 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
.c_str (), gnutarget
));
2310 if (dwz_bfd
!= NULL
)
2312 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2313 dwz_bfd
.reset (nullptr);
2316 if (dwz_bfd
== NULL
)
2317 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2319 if (dwz_bfd
== nullptr)
2321 /* If the user has provided us with different
2322 debug file directories, we can try them in order. */
2323 dwz_bfd
= dwz_search_other_debugdirs (filename
, buildid
, buildid_len
);
2326 if (dwz_bfd
== nullptr)
2328 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2329 const char *origname
= bfd_get_filename (per_bfd
->obfd
);
2331 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2338 /* File successfully retrieved from server. */
2339 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2341 if (dwz_bfd
== nullptr)
2342 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2343 alt_filename
.get ());
2344 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2345 dwz_bfd
.reset (nullptr);
2349 if (dwz_bfd
== NULL
)
2350 error (_("could not find '.gnu_debugaltlink' file for %s"),
2351 bfd_get_filename (per_bfd
->obfd
));
2353 std::unique_ptr
<struct dwz_file
> result
2354 (new struct dwz_file (std::move (dwz_bfd
)));
2356 for (asection
*sec
: gdb_bfd_sections (result
->dwz_bfd
))
2357 locate_dwz_sections (result
->dwz_bfd
.get (), sec
, result
.get ());
2359 gdb_bfd_record_inclusion (per_bfd
->obfd
, result
->dwz_bfd
.get ());
2360 per_bfd
->dwz_file
= std::move (result
);
2361 return per_bfd
->dwz_file
.get ();
2364 /* DWARF quick_symbols_functions support. */
2366 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2367 unique line tables, so we maintain a separate table of all .debug_line
2368 derived entries to support the sharing.
2369 All the quick functions need is the list of file names. We discard the
2370 line_header when we're done and don't need to record it here. */
2371 struct quick_file_names
2373 /* The data used to construct the hash key. */
2374 struct stmt_list_hash hash
;
2376 /* The number of entries in file_names, real_names. */
2377 unsigned int num_file_names
;
2379 /* The file names from the line table, after being run through
2381 const char **file_names
;
2383 /* The file names from the line table after being run through
2384 gdb_realpath. These are computed lazily. */
2385 const char **real_names
;
2388 /* When using the index (and thus not using psymtabs), each CU has an
2389 object of this type. This is used to hold information needed by
2390 the various "quick" methods. */
2391 struct dwarf2_per_cu_quick_data
2393 /* The file table. This can be NULL if there was no file table
2394 or it's currently not read in.
2395 NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */
2396 struct quick_file_names
*file_names
;
2398 /* A temporary mark bit used when iterating over all CUs in
2399 expand_symtabs_matching. */
2400 unsigned int mark
: 1;
2402 /* True if we've tried to read the file table and found there isn't one.
2403 There will be no point in trying to read it again next time. */
2404 unsigned int no_file_data
: 1;
2407 /* Utility hash function for a stmt_list_hash. */
2410 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2414 if (stmt_list_hash
->dwo_unit
!= NULL
)
2415 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2416 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2420 /* Utility equality function for a stmt_list_hash. */
2423 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2424 const struct stmt_list_hash
*rhs
)
2426 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2428 if (lhs
->dwo_unit
!= NULL
2429 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2432 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2435 /* Hash function for a quick_file_names. */
2438 hash_file_name_entry (const void *e
)
2440 const struct quick_file_names
*file_data
2441 = (const struct quick_file_names
*) e
;
2443 return hash_stmt_list_entry (&file_data
->hash
);
2446 /* Equality function for a quick_file_names. */
2449 eq_file_name_entry (const void *a
, const void *b
)
2451 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2452 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2454 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2457 /* Delete function for a quick_file_names. */
2460 delete_file_name_entry (void *e
)
2462 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2465 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2467 xfree ((void*) file_data
->file_names
[i
]);
2468 if (file_data
->real_names
)
2469 xfree ((void*) file_data
->real_names
[i
]);
2472 /* The space for the struct itself lives on the obstack, so we don't
2476 /* Create a quick_file_names hash table. */
2479 create_quick_file_names_table (unsigned int nr_initial_entries
)
2481 return htab_up (htab_create_alloc (nr_initial_entries
,
2482 hash_file_name_entry
, eq_file_name_entry
,
2483 delete_file_name_entry
, xcalloc
, xfree
));
2486 /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This
2487 function is unrelated to symtabs, symtab would have to be created afterwards.
2488 You should call age_cached_comp_units after processing the CU. */
2491 load_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
2494 if (per_cu
->is_debug_types
)
2495 load_full_type_unit (per_cu
, per_objfile
);
2497 load_full_comp_unit (per_cu
, per_objfile
, per_objfile
->get_cu (per_cu
),
2498 skip_partial
, language_minimal
);
2500 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
2502 return nullptr; /* Dummy CU. */
2504 dwarf2_find_base_address (cu
->dies
, cu
);
2509 /* Read in the symbols for PER_CU in the context of PER_OBJFILE. */
2512 dw2_do_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2513 dwarf2_per_objfile
*per_objfile
, bool skip_partial
)
2515 /* Skip type_unit_groups, reading the type units they contain
2516 is handled elsewhere. */
2517 if (per_cu
->type_unit_group_p ())
2520 /* The destructor of dwarf2_queue_guard frees any entries left on
2521 the queue. After this point we're guaranteed to leave this function
2522 with the dwarf queue empty. */
2523 dwarf2_queue_guard
q_guard (per_objfile
);
2525 if (!per_objfile
->symtab_set_p (per_cu
))
2527 queue_comp_unit (per_cu
, per_objfile
, language_minimal
);
2528 dwarf2_cu
*cu
= load_cu (per_cu
, per_objfile
, skip_partial
);
2530 /* If we just loaded a CU from a DWO, and we're working with an index
2531 that may badly handle TUs, load all the TUs in that DWO as well.
2532 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2533 if (!per_cu
->is_debug_types
2535 && cu
->dwo_unit
!= NULL
2536 && per_objfile
->per_bfd
->index_table
!= NULL
2537 && per_objfile
->per_bfd
->index_table
->version
<= 7
2538 /* DWP files aren't supported yet. */
2539 && get_dwp_file (per_objfile
) == NULL
)
2540 queue_and_load_all_dwo_tus (cu
);
2543 process_queue (per_objfile
);
2545 /* Age the cache, releasing compilation units that have not
2546 been used recently. */
2547 per_objfile
->age_comp_units ();
2550 /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is
2551 the per-objfile for which this symtab is instantiated.
2553 Returns the resulting symbol table. */
2555 static struct compunit_symtab
*
2556 dw2_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2557 dwarf2_per_objfile
*per_objfile
,
2560 gdb_assert (per_objfile
->per_bfd
->using_index
);
2562 if (!per_objfile
->symtab_set_p (per_cu
))
2564 free_cached_comp_units
freer (per_objfile
);
2565 scoped_restore decrementer
= increment_reading_symtab ();
2566 dw2_do_instantiate_symtab (per_cu
, per_objfile
, skip_partial
);
2567 process_cu_includes (per_objfile
);
2570 return per_objfile
->get_symtab (per_cu
);
2573 /* See declaration. */
2575 dwarf2_per_cu_data
*
2576 dwarf2_per_bfd::get_cutu (int index
)
2578 if (index
>= this->all_comp_units
.size ())
2580 index
-= this->all_comp_units
.size ();
2581 gdb_assert (index
< this->all_type_units
.size ());
2582 return &this->all_type_units
[index
]->per_cu
;
2585 return this->all_comp_units
[index
];
2588 /* See declaration. */
2590 dwarf2_per_cu_data
*
2591 dwarf2_per_bfd::get_cu (int index
)
2593 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2595 return this->all_comp_units
[index
];
2598 /* See declaration. */
2601 dwarf2_per_bfd::get_tu (int index
)
2603 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2605 return this->all_type_units
[index
];
2610 dwarf2_per_cu_data
*
2611 dwarf2_per_bfd::allocate_per_cu ()
2613 dwarf2_per_cu_data
*result
= OBSTACK_ZALLOC (&obstack
, dwarf2_per_cu_data
);
2614 result
->per_bfd
= this;
2615 result
->index
= m_num_psymtabs
++;
2622 dwarf2_per_bfd::allocate_signatured_type ()
2624 signatured_type
*result
= OBSTACK_ZALLOC (&obstack
, signatured_type
);
2625 result
->per_cu
.per_bfd
= this;
2626 result
->per_cu
.index
= m_num_psymtabs
++;
2630 /* Return a new dwarf2_per_cu_data allocated on the per-bfd
2631 obstack, and constructed with the specified field values. */
2633 static dwarf2_per_cu_data
*
2634 create_cu_from_index_list (dwarf2_per_bfd
*per_bfd
,
2635 struct dwarf2_section_info
*section
,
2637 sect_offset sect_off
, ULONGEST length
)
2639 dwarf2_per_cu_data
*the_cu
= per_bfd
->allocate_per_cu ();
2640 the_cu
->sect_off
= sect_off
;
2641 the_cu
->length
= length
;
2642 the_cu
->section
= section
;
2643 the_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
2644 struct dwarf2_per_cu_quick_data
);
2645 the_cu
->is_dwz
= is_dwz
;
2649 /* A helper for create_cus_from_index that handles a given list of
2653 create_cus_from_index_list (dwarf2_per_bfd
*per_bfd
,
2654 const gdb_byte
*cu_list
, offset_type n_elements
,
2655 struct dwarf2_section_info
*section
,
2658 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2660 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2662 sect_offset sect_off
2663 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2664 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2667 dwarf2_per_cu_data
*per_cu
2668 = create_cu_from_index_list (per_bfd
, section
, is_dwz
, sect_off
,
2670 per_bfd
->all_comp_units
.push_back (per_cu
);
2674 /* Read the CU list from the mapped index, and use it to create all
2675 the CU objects for PER_BFD. */
2678 create_cus_from_index (dwarf2_per_bfd
*per_bfd
,
2679 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2680 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2682 gdb_assert (per_bfd
->all_comp_units
.empty ());
2683 per_bfd
->all_comp_units
.reserve ((cu_list_elements
+ dwz_elements
) / 2);
2685 create_cus_from_index_list (per_bfd
, cu_list
, cu_list_elements
,
2688 if (dwz_elements
== 0)
2691 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
2692 create_cus_from_index_list (per_bfd
, dwz_list
, dwz_elements
,
2696 /* Create the signatured type hash table from the index. */
2699 create_signatured_type_table_from_index
2700 (dwarf2_per_bfd
*per_bfd
, struct dwarf2_section_info
*section
,
2701 const gdb_byte
*bytes
, offset_type elements
)
2703 gdb_assert (per_bfd
->all_type_units
.empty ());
2704 per_bfd
->all_type_units
.reserve (elements
/ 3);
2706 htab_up sig_types_hash
= allocate_signatured_type_table ();
2708 for (offset_type i
= 0; i
< elements
; i
+= 3)
2710 struct signatured_type
*sig_type
;
2713 cu_offset type_offset_in_tu
;
2715 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2716 sect_offset sect_off
2717 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2719 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2721 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2724 sig_type
= per_bfd
->allocate_signatured_type ();
2725 sig_type
->signature
= signature
;
2726 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2727 sig_type
->per_cu
.is_debug_types
= 1;
2728 sig_type
->per_cu
.section
= section
;
2729 sig_type
->per_cu
.sect_off
= sect_off
;
2730 sig_type
->per_cu
.v
.quick
2731 = OBSTACK_ZALLOC (&per_bfd
->obstack
,
2732 struct dwarf2_per_cu_quick_data
);
2734 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2737 per_bfd
->all_type_units
.push_back (sig_type
);
2740 per_bfd
->signatured_types
= std::move (sig_types_hash
);
2743 /* Create the signatured type hash table from .debug_names. */
2746 create_signatured_type_table_from_debug_names
2747 (dwarf2_per_objfile
*per_objfile
,
2748 const mapped_debug_names
&map
,
2749 struct dwarf2_section_info
*section
,
2750 struct dwarf2_section_info
*abbrev_section
)
2752 struct objfile
*objfile
= per_objfile
->objfile
;
2754 section
->read (objfile
);
2755 abbrev_section
->read (objfile
);
2757 gdb_assert (per_objfile
->per_bfd
->all_type_units
.empty ());
2758 per_objfile
->per_bfd
->all_type_units
.reserve (map
.tu_count
);
2760 htab_up sig_types_hash
= allocate_signatured_type_table ();
2762 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2764 struct signatured_type
*sig_type
;
2767 sect_offset sect_off
2768 = (sect_offset
) (extract_unsigned_integer
2769 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2771 map
.dwarf5_byte_order
));
2773 comp_unit_head cu_header
;
2774 read_and_check_comp_unit_head (per_objfile
, &cu_header
, section
,
2776 section
->buffer
+ to_underlying (sect_off
),
2779 sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
2780 sig_type
->signature
= cu_header
.signature
;
2781 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2782 sig_type
->per_cu
.is_debug_types
= 1;
2783 sig_type
->per_cu
.section
= section
;
2784 sig_type
->per_cu
.sect_off
= sect_off
;
2785 sig_type
->per_cu
.v
.quick
2786 = OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
,
2787 struct dwarf2_per_cu_quick_data
);
2789 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2792 per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2795 per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2798 /* Read the address map data from the mapped index, and use it to
2799 populate the objfile's psymtabs_addrmap. */
2802 create_addrmap_from_index (dwarf2_per_objfile
*per_objfile
,
2803 struct mapped_index
*index
)
2805 struct objfile
*objfile
= per_objfile
->objfile
;
2806 struct gdbarch
*gdbarch
= objfile
->arch ();
2807 const gdb_byte
*iter
, *end
;
2808 struct addrmap
*mutable_map
;
2811 auto_obstack temp_obstack
;
2813 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2815 iter
= index
->address_table
.data ();
2816 end
= iter
+ index
->address_table
.size ();
2818 baseaddr
= objfile
->text_section_offset ();
2822 ULONGEST hi
, lo
, cu_index
;
2823 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2825 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2827 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2832 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2833 hex_string (lo
), hex_string (hi
));
2837 if (cu_index
>= per_objfile
->per_bfd
->all_comp_units
.size ())
2839 complaint (_(".gdb_index address table has invalid CU number %u"),
2840 (unsigned) cu_index
);
2844 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2845 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2846 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2847 per_objfile
->per_bfd
->get_cu (cu_index
));
2850 objfile
->partial_symtabs
->psymtabs_addrmap
2851 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2854 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2855 populate the objfile's psymtabs_addrmap. */
2858 create_addrmap_from_aranges (dwarf2_per_objfile
*per_objfile
,
2859 struct dwarf2_section_info
*section
)
2861 struct objfile
*objfile
= per_objfile
->objfile
;
2862 bfd
*abfd
= objfile
->obfd
;
2863 struct gdbarch
*gdbarch
= objfile
->arch ();
2864 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2866 auto_obstack temp_obstack
;
2867 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2869 std::unordered_map
<sect_offset
,
2870 dwarf2_per_cu_data
*,
2871 gdb::hash_enum
<sect_offset
>>
2872 debug_info_offset_to_per_cu
;
2873 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
2875 const auto insertpair
2876 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2877 if (!insertpair
.second
)
2879 warning (_("Section .debug_aranges in %s has duplicate "
2880 "debug_info_offset %s, ignoring .debug_aranges."),
2881 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2886 section
->read (objfile
);
2888 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2890 const gdb_byte
*addr
= section
->buffer
;
2892 while (addr
< section
->buffer
+ section
->size
)
2894 const gdb_byte
*const entry_addr
= addr
;
2895 unsigned int bytes_read
;
2897 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2901 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2902 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2903 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2904 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2906 warning (_("Section .debug_aranges in %s entry at offset %s "
2907 "length %s exceeds section length %s, "
2908 "ignoring .debug_aranges."),
2909 objfile_name (objfile
),
2910 plongest (entry_addr
- section
->buffer
),
2911 plongest (bytes_read
+ entry_length
),
2912 pulongest (section
->size
));
2916 /* The version number. */
2917 const uint16_t version
= read_2_bytes (abfd
, addr
);
2921 warning (_("Section .debug_aranges in %s entry at offset %s "
2922 "has unsupported version %d, ignoring .debug_aranges."),
2923 objfile_name (objfile
),
2924 plongest (entry_addr
- section
->buffer
), version
);
2928 const uint64_t debug_info_offset
2929 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2930 addr
+= offset_size
;
2931 const auto per_cu_it
2932 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2933 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2935 warning (_("Section .debug_aranges in %s entry at offset %s "
2936 "debug_info_offset %s does not exists, "
2937 "ignoring .debug_aranges."),
2938 objfile_name (objfile
),
2939 plongest (entry_addr
- section
->buffer
),
2940 pulongest (debug_info_offset
));
2943 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2945 const uint8_t address_size
= *addr
++;
2946 if (address_size
< 1 || address_size
> 8)
2948 warning (_("Section .debug_aranges in %s entry at offset %s "
2949 "address_size %u is invalid, ignoring .debug_aranges."),
2950 objfile_name (objfile
),
2951 plongest (entry_addr
- section
->buffer
), address_size
);
2955 const uint8_t segment_selector_size
= *addr
++;
2956 if (segment_selector_size
!= 0)
2958 warning (_("Section .debug_aranges in %s entry at offset %s "
2959 "segment_selector_size %u is not supported, "
2960 "ignoring .debug_aranges."),
2961 objfile_name (objfile
),
2962 plongest (entry_addr
- section
->buffer
),
2963 segment_selector_size
);
2967 /* Must pad to an alignment boundary that is twice the address
2968 size. It is undocumented by the DWARF standard but GCC does
2970 for (size_t padding
= ((-(addr
- section
->buffer
))
2971 & (2 * address_size
- 1));
2972 padding
> 0; padding
--)
2975 warning (_("Section .debug_aranges in %s entry at offset %s "
2976 "padding is not zero, ignoring .debug_aranges."),
2977 objfile_name (objfile
),
2978 plongest (entry_addr
- section
->buffer
));
2984 if (addr
+ 2 * address_size
> entry_end
)
2986 warning (_("Section .debug_aranges in %s entry at offset %s "
2987 "address list is not properly terminated, "
2988 "ignoring .debug_aranges."),
2989 objfile_name (objfile
),
2990 plongest (entry_addr
- section
->buffer
));
2993 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2995 addr
+= address_size
;
2996 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2998 addr
+= address_size
;
2999 if (start
== 0 && length
== 0)
3001 if (start
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
3003 /* Symbol was eliminated due to a COMDAT group. */
3006 ULONGEST end
= start
+ length
;
3007 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3009 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3011 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3015 objfile
->partial_symtabs
->psymtabs_addrmap
3016 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3019 /* Find a slot in the mapped index INDEX for the object named NAME.
3020 If NAME is found, set *VEC_OUT to point to the CU vector in the
3021 constant pool and return true. If NAME cannot be found, return
3025 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3026 offset_type
**vec_out
)
3029 offset_type slot
, step
;
3030 int (*cmp
) (const char *, const char *);
3032 gdb::unique_xmalloc_ptr
<char> without_params
;
3033 if (current_language
->la_language
== language_cplus
3034 || current_language
->la_language
== language_fortran
3035 || current_language
->la_language
== language_d
)
3037 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3040 if (strchr (name
, '(') != NULL
)
3042 without_params
= cp_remove_params (name
);
3044 if (without_params
!= NULL
)
3045 name
= without_params
.get ();
3049 /* Index version 4 did not support case insensitive searches. But the
3050 indices for case insensitive languages are built in lowercase, therefore
3051 simulate our NAME being searched is also lowercased. */
3052 hash
= mapped_index_string_hash ((index
->version
== 4
3053 && case_sensitivity
== case_sensitive_off
3054 ? 5 : index
->version
),
3057 slot
= hash
& (index
->symbol_table
.size () - 1);
3058 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3059 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3065 const auto &bucket
= index
->symbol_table
[slot
];
3066 if (bucket
.name
== 0 && bucket
.vec
== 0)
3069 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3070 if (!cmp (name
, str
))
3072 *vec_out
= (offset_type
*) (index
->constant_pool
3073 + MAYBE_SWAP (bucket
.vec
));
3077 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3081 /* A helper function that reads the .gdb_index from BUFFER and fills
3082 in MAP. FILENAME is the name of the file containing the data;
3083 it is used for error reporting. DEPRECATED_OK is true if it is
3084 ok to use deprecated sections.
3086 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3087 out parameters that are filled in with information about the CU and
3088 TU lists in the section.
3090 Returns true if all went well, false otherwise. */
3093 read_gdb_index_from_buffer (const char *filename
,
3095 gdb::array_view
<const gdb_byte
> buffer
,
3096 struct mapped_index
*map
,
3097 const gdb_byte
**cu_list
,
3098 offset_type
*cu_list_elements
,
3099 const gdb_byte
**types_list
,
3100 offset_type
*types_list_elements
)
3102 const gdb_byte
*addr
= &buffer
[0];
3104 /* Version check. */
3105 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3106 /* Versions earlier than 3 emitted every copy of a psymbol. This
3107 causes the index to behave very poorly for certain requests. Version 3
3108 contained incomplete addrmap. So, it seems better to just ignore such
3112 static int warning_printed
= 0;
3113 if (!warning_printed
)
3115 warning (_("Skipping obsolete .gdb_index section in %s."),
3117 warning_printed
= 1;
3121 /* Index version 4 uses a different hash function than index version
3124 Versions earlier than 6 did not emit psymbols for inlined
3125 functions. Using these files will cause GDB not to be able to
3126 set breakpoints on inlined functions by name, so we ignore these
3127 indices unless the user has done
3128 "set use-deprecated-index-sections on". */
3129 if (version
< 6 && !deprecated_ok
)
3131 static int warning_printed
= 0;
3132 if (!warning_printed
)
3135 Skipping deprecated .gdb_index section in %s.\n\
3136 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3137 to use the section anyway."),
3139 warning_printed
= 1;
3143 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3144 of the TU (for symbols coming from TUs),
3145 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3146 Plus gold-generated indices can have duplicate entries for global symbols,
3147 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3148 These are just performance bugs, and we can't distinguish gdb-generated
3149 indices from gold-generated ones, so issue no warning here. */
3151 /* Indexes with higher version than the one supported by GDB may be no
3152 longer backward compatible. */
3156 map
->version
= version
;
3158 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3161 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3162 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3166 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3167 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3168 - MAYBE_SWAP (metadata
[i
]))
3172 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3173 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3175 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3178 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3179 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3181 = gdb::array_view
<mapped_index::symbol_table_slot
>
3182 ((mapped_index::symbol_table_slot
*) symbol_table
,
3183 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3186 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3191 /* Callback types for dwarf2_read_gdb_index. */
3193 typedef gdb::function_view
3194 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_bfd
*)>
3195 get_gdb_index_contents_ftype
;
3196 typedef gdb::function_view
3197 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3198 get_gdb_index_contents_dwz_ftype
;
3200 /* Read .gdb_index. If everything went ok, initialize the "quick"
3201 elements of all the CUs and return 1. Otherwise, return 0. */
3204 dwarf2_read_gdb_index
3205 (dwarf2_per_objfile
*per_objfile
,
3206 get_gdb_index_contents_ftype get_gdb_index_contents
,
3207 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3209 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3210 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3211 struct dwz_file
*dwz
;
3212 struct objfile
*objfile
= per_objfile
->objfile
;
3213 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
3215 gdb::array_view
<const gdb_byte
> main_index_contents
3216 = get_gdb_index_contents (objfile
, per_bfd
);
3218 if (main_index_contents
.empty ())
3221 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3222 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3223 use_deprecated_index_sections
,
3224 main_index_contents
, map
.get (), &cu_list
,
3225 &cu_list_elements
, &types_list
,
3226 &types_list_elements
))
3229 /* Don't use the index if it's empty. */
3230 if (map
->symbol_table
.empty ())
3233 /* If there is a .dwz file, read it so we can get its CU list as
3235 dwz
= dwarf2_get_dwz_file (per_bfd
);
3238 struct mapped_index dwz_map
;
3239 const gdb_byte
*dwz_types_ignore
;
3240 offset_type dwz_types_elements_ignore
;
3242 gdb::array_view
<const gdb_byte
> dwz_index_content
3243 = get_gdb_index_contents_dwz (objfile
, dwz
);
3245 if (dwz_index_content
.empty ())
3248 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3249 1, dwz_index_content
, &dwz_map
,
3250 &dwz_list
, &dwz_list_elements
,
3252 &dwz_types_elements_ignore
))
3254 warning (_("could not read '.gdb_index' section from %s; skipping"),
3255 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3260 create_cus_from_index (per_bfd
, cu_list
, cu_list_elements
, dwz_list
,
3263 if (types_list_elements
)
3265 /* We can only handle a single .debug_types when we have an
3267 if (per_bfd
->types
.size () != 1)
3270 dwarf2_section_info
*section
= &per_bfd
->types
[0];
3272 create_signatured_type_table_from_index (per_bfd
, section
, types_list
,
3273 types_list_elements
);
3276 create_addrmap_from_index (per_objfile
, map
.get ());
3278 per_bfd
->index_table
= std::move (map
);
3279 per_bfd
->using_index
= 1;
3280 per_bfd
->quick_file_names_table
=
3281 create_quick_file_names_table (per_bfd
->all_comp_units
.size ());
3283 /* Save partial symtabs in the per_bfd object, for the benefit of subsequent
3284 objfiles using the same BFD. */
3285 gdb_assert (per_bfd
->partial_symtabs
== nullptr);
3286 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
3291 /* die_reader_func for dw2_get_file_names. */
3294 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3295 const gdb_byte
*info_ptr
,
3296 struct die_info
*comp_unit_die
)
3298 struct dwarf2_cu
*cu
= reader
->cu
;
3299 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3300 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
3301 struct dwarf2_per_cu_data
*lh_cu
;
3302 struct attribute
*attr
;
3304 struct quick_file_names
*qfn
;
3306 gdb_assert (! this_cu
->is_debug_types
);
3308 /* Our callers never want to match partial units -- instead they
3309 will match the enclosing full CU. */
3310 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3312 this_cu
->v
.quick
->no_file_data
= 1;
3320 sect_offset line_offset
{};
3322 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3323 if (attr
!= nullptr && attr
->form_is_unsigned ())
3325 struct quick_file_names find_entry
;
3327 line_offset
= (sect_offset
) attr
->as_unsigned ();
3329 /* We may have already read in this line header (TU line header sharing).
3330 If we have we're done. */
3331 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3332 find_entry
.hash
.line_sect_off
= line_offset
;
3333 slot
= htab_find_slot (per_objfile
->per_bfd
->quick_file_names_table
.get (),
3334 &find_entry
, INSERT
);
3337 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3341 lh
= dwarf_decode_line_header (line_offset
, cu
);
3345 lh_cu
->v
.quick
->no_file_data
= 1;
3349 qfn
= XOBNEW (&per_objfile
->per_bfd
->obstack
, struct quick_file_names
);
3350 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3351 qfn
->hash
.line_sect_off
= line_offset
;
3352 gdb_assert (slot
!= NULL
);
3355 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3358 if (strcmp (fnd
.name
, "<unknown>") != 0)
3361 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3363 XOBNEWVEC (&per_objfile
->per_bfd
->obstack
, const char *,
3364 qfn
->num_file_names
);
3366 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3367 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3368 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3369 fnd
.comp_dir
).release ();
3370 qfn
->real_names
= NULL
;
3372 lh_cu
->v
.quick
->file_names
= qfn
;
3375 /* A helper for the "quick" functions which attempts to read the line
3376 table for THIS_CU. */
3378 static struct quick_file_names
*
3379 dw2_get_file_names (dwarf2_per_cu_data
*this_cu
,
3380 dwarf2_per_objfile
*per_objfile
)
3382 /* This should never be called for TUs. */
3383 gdb_assert (! this_cu
->is_debug_types
);
3384 /* Nor type unit groups. */
3385 gdb_assert (! this_cu
->type_unit_group_p ());
3387 if (this_cu
->v
.quick
->file_names
!= NULL
)
3388 return this_cu
->v
.quick
->file_names
;
3389 /* If we know there is no line data, no point in looking again. */
3390 if (this_cu
->v
.quick
->no_file_data
)
3393 cutu_reader
reader (this_cu
, per_objfile
);
3394 if (!reader
.dummy_p
)
3395 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3397 if (this_cu
->v
.quick
->no_file_data
)
3399 return this_cu
->v
.quick
->file_names
;
3402 /* A helper for the "quick" functions which computes and caches the
3403 real path for a given file name from the line table. */
3406 dw2_get_real_path (dwarf2_per_objfile
*per_objfile
,
3407 struct quick_file_names
*qfn
, int index
)
3409 if (qfn
->real_names
== NULL
)
3410 qfn
->real_names
= OBSTACK_CALLOC (&per_objfile
->per_bfd
->obstack
,
3411 qfn
->num_file_names
, const char *);
3413 if (qfn
->real_names
[index
] == NULL
)
3414 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3416 return qfn
->real_names
[index
];
3419 static struct symtab
*
3420 dw2_find_last_source_symtab (struct objfile
*objfile
)
3422 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3423 dwarf2_per_cu_data
*dwarf_cu
= per_objfile
->per_bfd
->all_comp_units
.back ();
3424 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, per_objfile
, false);
3429 return compunit_primary_filetab (cust
);
3432 /* Traversal function for dw2_forget_cached_source_info. */
3435 dw2_free_cached_file_names (void **slot
, void *info
)
3437 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3439 if (file_data
->real_names
)
3443 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3445 xfree ((void*) file_data
->real_names
[i
]);
3446 file_data
->real_names
[i
] = NULL
;
3454 dw2_forget_cached_source_info (struct objfile
*objfile
)
3456 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3458 htab_traverse_noresize (per_objfile
->per_bfd
->quick_file_names_table
.get (),
3459 dw2_free_cached_file_names
, NULL
);
3462 /* Helper function for dw2_map_symtabs_matching_filename that expands
3463 the symtabs and calls the iterator. */
3466 dw2_map_expand_apply (struct objfile
*objfile
,
3467 struct dwarf2_per_cu_data
*per_cu
,
3468 const char *name
, const char *real_path
,
3469 gdb::function_view
<bool (symtab
*)> callback
)
3471 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3473 /* Don't visit already-expanded CUs. */
3474 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3475 if (per_objfile
->symtab_set_p (per_cu
))
3478 /* This may expand more than one symtab, and we want to iterate over
3480 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3482 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3483 last_made
, callback
);
3486 /* Implementation of the map_symtabs_matching_filename method. */
3489 dw2_map_symtabs_matching_filename
3490 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3491 gdb::function_view
<bool (symtab
*)> callback
)
3493 const char *name_basename
= lbasename (name
);
3494 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3496 /* The rule is CUs specify all the files, including those used by
3497 any TU, so there's no need to scan TUs here. */
3499 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
3501 /* We only need to look at symtabs not already expanded. */
3502 if (per_objfile
->symtab_set_p (per_cu
))
3505 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
3506 if (file_data
== NULL
)
3509 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3511 const char *this_name
= file_data
->file_names
[j
];
3512 const char *this_real_name
;
3514 if (compare_filenames_for_search (this_name
, name
))
3516 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3522 /* Before we invoke realpath, which can get expensive when many
3523 files are involved, do a quick comparison of the basenames. */
3524 if (! basenames_may_differ
3525 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3528 this_real_name
= dw2_get_real_path (per_objfile
, file_data
, j
);
3529 if (compare_filenames_for_search (this_real_name
, name
))
3531 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3537 if (real_path
!= NULL
)
3539 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3540 gdb_assert (IS_ABSOLUTE_PATH (name
));
3541 if (this_real_name
!= NULL
3542 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3544 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3556 /* Struct used to manage iterating over all CUs looking for a symbol. */
3558 struct dw2_symtab_iterator
3560 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3561 dwarf2_per_objfile
*per_objfile
;
3562 /* If set, only look for symbols that match that block. Valid values are
3563 GLOBAL_BLOCK and STATIC_BLOCK. */
3564 gdb::optional
<block_enum
> block_index
;
3565 /* The kind of symbol we're looking for. */
3567 /* The list of CUs from the index entry of the symbol,
3568 or NULL if not found. */
3570 /* The next element in VEC to look at. */
3572 /* The number of elements in VEC, or zero if there is no match. */
3574 /* Have we seen a global version of the symbol?
3575 If so we can ignore all further global instances.
3576 This is to work around gold/15646, inefficient gold-generated
3581 /* Initialize the index symtab iterator ITER, common part. */
3584 dw2_symtab_iter_init_common (struct dw2_symtab_iterator
*iter
,
3585 dwarf2_per_objfile
*per_objfile
,
3586 gdb::optional
<block_enum
> block_index
,
3589 iter
->per_objfile
= per_objfile
;
3590 iter
->block_index
= block_index
;
3591 iter
->domain
= domain
;
3593 iter
->global_seen
= 0;
3598 /* Initialize the index symtab iterator ITER, const char *NAME variant. */
3601 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3602 dwarf2_per_objfile
*per_objfile
,
3603 gdb::optional
<block_enum
> block_index
,
3607 dw2_symtab_iter_init_common (iter
, per_objfile
, block_index
, domain
);
3609 mapped_index
*index
= per_objfile
->per_bfd
->index_table
.get ();
3610 /* index is NULL if OBJF_READNOW. */
3614 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3615 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3618 /* Initialize the index symtab iterator ITER, offset_type NAMEI variant. */
3621 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3622 dwarf2_per_objfile
*per_objfile
,
3623 gdb::optional
<block_enum
> block_index
,
3624 domain_enum domain
, offset_type namei
)
3626 dw2_symtab_iter_init_common (iter
, per_objfile
, block_index
, domain
);
3628 mapped_index
*index
= per_objfile
->per_bfd
->index_table
.get ();
3629 /* index is NULL if OBJF_READNOW. */
3633 gdb_assert (!index
->symbol_name_slot_invalid (namei
));
3634 const auto &bucket
= index
->symbol_table
[namei
];
3636 iter
->vec
= (offset_type
*) (index
->constant_pool
3637 + MAYBE_SWAP (bucket
.vec
));
3638 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3641 /* Return the next matching CU or NULL if there are no more. */
3643 static struct dwarf2_per_cu_data
*
3644 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3646 dwarf2_per_objfile
*per_objfile
= iter
->per_objfile
;
3648 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3650 offset_type cu_index_and_attrs
=
3651 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3652 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3653 gdb_index_symbol_kind symbol_kind
=
3654 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3655 /* Only check the symbol attributes if they're present.
3656 Indices prior to version 7 don't record them,
3657 and indices >= 7 may elide them for certain symbols
3658 (gold does this). */
3660 (per_objfile
->per_bfd
->index_table
->version
>= 7
3661 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3663 /* Don't crash on bad data. */
3664 if (cu_index
>= (per_objfile
->per_bfd
->all_comp_units
.size ()
3665 + per_objfile
->per_bfd
->all_type_units
.size ()))
3667 complaint (_(".gdb_index entry has bad CU index"
3668 " [in module %s]"), objfile_name (per_objfile
->objfile
));
3672 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (cu_index
);
3674 /* Skip if already read in. */
3675 if (per_objfile
->symtab_set_p (per_cu
))
3678 /* Check static vs global. */
3681 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3683 if (iter
->block_index
.has_value ())
3685 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3687 if (is_static
!= want_static
)
3691 /* Work around gold/15646. */
3693 && symbol_kind
== GDB_INDEX_SYMBOL_KIND_TYPE
)
3695 if (iter
->global_seen
)
3698 iter
->global_seen
= 1;
3702 /* Only check the symbol's kind if it has one. */
3705 switch (iter
->domain
)
3708 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3709 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3710 /* Some types are also in VAR_DOMAIN. */
3711 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3715 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3719 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3723 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3738 static struct compunit_symtab
*
3739 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3740 const char *name
, domain_enum domain
)
3742 struct compunit_symtab
*stab_best
= NULL
;
3743 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3745 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3747 struct dw2_symtab_iterator iter
;
3748 struct dwarf2_per_cu_data
*per_cu
;
3750 dw2_symtab_iter_init (&iter
, per_objfile
, block_index
, domain
, name
);
3752 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3754 struct symbol
*sym
, *with_opaque
= NULL
;
3755 struct compunit_symtab
*stab
3756 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3757 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3758 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3760 sym
= block_find_symbol (block
, name
, domain
,
3761 block_find_non_opaque_type_preferred
,
3764 /* Some caution must be observed with overloaded functions
3765 and methods, since the index will not contain any overload
3766 information (but NAME might contain it). */
3769 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3771 if (with_opaque
!= NULL
3772 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3775 /* Keep looking through other CUs. */
3782 dw2_print_stats (struct objfile
*objfile
)
3784 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3785 int total
= (per_objfile
->per_bfd
->all_comp_units
.size ()
3786 + per_objfile
->per_bfd
->all_type_units
.size ());
3789 for (int i
= 0; i
< total
; ++i
)
3791 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (i
);
3793 if (!per_objfile
->symtab_set_p (per_cu
))
3796 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3797 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3800 /* This dumps minimal information about the index.
3801 It is called via "mt print objfiles".
3802 One use is to verify .gdb_index has been loaded by the
3803 gdb.dwarf2/gdb-index.exp testcase. */
3806 dw2_dump (struct objfile
*objfile
)
3808 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3810 gdb_assert (per_objfile
->per_bfd
->using_index
);
3811 printf_filtered (".gdb_index:");
3812 if (per_objfile
->per_bfd
->index_table
!= NULL
)
3814 printf_filtered (" version %d\n",
3815 per_objfile
->per_bfd
->index_table
->version
);
3818 printf_filtered (" faked for \"readnow\"\n");
3819 printf_filtered ("\n");
3823 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3824 const char *func_name
)
3826 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3828 struct dw2_symtab_iterator iter
;
3829 struct dwarf2_per_cu_data
*per_cu
;
3831 dw2_symtab_iter_init (&iter
, per_objfile
, {}, VAR_DOMAIN
, func_name
);
3833 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3834 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3839 dw2_expand_all_symtabs (struct objfile
*objfile
)
3841 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3842 int total_units
= (per_objfile
->per_bfd
->all_comp_units
.size ()
3843 + per_objfile
->per_bfd
->all_type_units
.size ());
3845 for (int i
= 0; i
< total_units
; ++i
)
3847 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (i
);
3849 /* We don't want to directly expand a partial CU, because if we
3850 read it with the wrong language, then assertion failures can
3851 be triggered later on. See PR symtab/23010. So, tell
3852 dw2_instantiate_symtab to skip partial CUs -- any important
3853 partial CU will be read via DW_TAG_imported_unit anyway. */
3854 dw2_instantiate_symtab (per_cu
, per_objfile
, true);
3859 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3860 const char *fullname
)
3862 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3864 /* We don't need to consider type units here.
3865 This is only called for examining code, e.g. expand_line_sal.
3866 There can be an order of magnitude (or more) more type units
3867 than comp units, and we avoid them if we can. */
3869 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
3871 /* We only need to look at symtabs not already expanded. */
3872 if (per_objfile
->symtab_set_p (per_cu
))
3875 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
3876 if (file_data
== NULL
)
3879 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3881 const char *this_fullname
= file_data
->file_names
[j
];
3883 if (filename_cmp (this_fullname
, fullname
) == 0)
3885 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3893 dw2_expand_symtabs_matching_symbol
3894 (mapped_index_base
&index
,
3895 const lookup_name_info
&lookup_name_in
,
3896 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3897 enum search_domain kind
,
3898 gdb::function_view
<bool (offset_type
)> match_callback
,
3899 dwarf2_per_objfile
*per_objfile
);
3902 dw2_expand_symtabs_matching_one
3903 (dwarf2_per_cu_data
*per_cu
,
3904 dwarf2_per_objfile
*per_objfile
,
3905 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3906 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3909 dw2_map_matching_symbols
3910 (struct objfile
*objfile
,
3911 const lookup_name_info
&name
, domain_enum domain
,
3913 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3914 symbol_compare_ftype
*ordered_compare
)
3917 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3919 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3921 if (per_objfile
->per_bfd
->index_table
!= nullptr)
3923 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
3925 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3926 auto matcher
= [&] (const char *symname
)
3928 if (ordered_compare
== nullptr)
3930 return ordered_compare (symname
, match_name
) == 0;
3933 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3934 [&] (offset_type namei
)
3936 struct dw2_symtab_iterator iter
;
3937 struct dwarf2_per_cu_data
*per_cu
;
3939 dw2_symtab_iter_init (&iter
, per_objfile
, block_kind
, domain
,
3941 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3942 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, nullptr,
3949 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3950 proceed assuming all symtabs have been read in. */
3953 for (compunit_symtab
*cust
: objfile
->compunits ())
3955 const struct block
*block
;
3959 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3960 if (!iterate_over_symbols_terminated (block
, name
,
3966 /* Starting from a search name, return the string that finds the upper
3967 bound of all strings that start with SEARCH_NAME in a sorted name
3968 list. Returns the empty string to indicate that the upper bound is
3969 the end of the list. */
3972 make_sort_after_prefix_name (const char *search_name
)
3974 /* When looking to complete "func", we find the upper bound of all
3975 symbols that start with "func" by looking for where we'd insert
3976 the closest string that would follow "func" in lexicographical
3977 order. Usually, that's "func"-with-last-character-incremented,
3978 i.e. "fund". Mind non-ASCII characters, though. Usually those
3979 will be UTF-8 multi-byte sequences, but we can't be certain.
3980 Especially mind the 0xff character, which is a valid character in
3981 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3982 rule out compilers allowing it in identifiers. Note that
3983 conveniently, strcmp/strcasecmp are specified to compare
3984 characters interpreted as unsigned char. So what we do is treat
3985 the whole string as a base 256 number composed of a sequence of
3986 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3987 to 0, and carries 1 to the following more-significant position.
3988 If the very first character in SEARCH_NAME ends up incremented
3989 and carries/overflows, then the upper bound is the end of the
3990 list. The string after the empty string is also the empty
3993 Some examples of this operation:
3995 SEARCH_NAME => "+1" RESULT
3999 "\xff" "a" "\xff" => "\xff" "b"
4004 Then, with these symbols for example:
4010 completing "func" looks for symbols between "func" and
4011 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4012 which finds "func" and "func1", but not "fund".
4016 funcÿ (Latin1 'ÿ' [0xff])
4020 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4021 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4025 ÿÿ (Latin1 'ÿ' [0xff])
4028 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4029 the end of the list.
4031 std::string after
= search_name
;
4032 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4034 if (!after
.empty ())
4035 after
.back () = (unsigned char) after
.back () + 1;
4039 /* See declaration. */
4041 std::pair
<std::vector
<name_component
>::const_iterator
,
4042 std::vector
<name_component
>::const_iterator
>
4043 mapped_index_base::find_name_components_bounds
4044 (const lookup_name_info
&lookup_name_without_params
, language lang
,
4045 dwarf2_per_objfile
*per_objfile
) const
4048 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4050 const char *lang_name
4051 = lookup_name_without_params
.language_lookup_name (lang
);
4053 /* Comparison function object for lower_bound that matches against a
4054 given symbol name. */
4055 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4058 const char *elem_qualified
= this->symbol_name_at (elem
.idx
, per_objfile
);
4059 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4060 return name_cmp (elem_name
, name
) < 0;
4063 /* Comparison function object for upper_bound that matches against a
4064 given symbol name. */
4065 auto lookup_compare_upper
= [&] (const char *name
,
4066 const name_component
&elem
)
4068 const char *elem_qualified
= this->symbol_name_at (elem
.idx
, per_objfile
);
4069 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4070 return name_cmp (name
, elem_name
) < 0;
4073 auto begin
= this->name_components
.begin ();
4074 auto end
= this->name_components
.end ();
4076 /* Find the lower bound. */
4079 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
4082 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
4085 /* Find the upper bound. */
4088 if (lookup_name_without_params
.completion_mode ())
4090 /* In completion mode, we want UPPER to point past all
4091 symbols names that have the same prefix. I.e., with
4092 these symbols, and completing "func":
4094 function << lower bound
4096 other_function << upper bound
4098 We find the upper bound by looking for the insertion
4099 point of "func"-with-last-character-incremented,
4101 std::string after
= make_sort_after_prefix_name (lang_name
);
4104 return std::lower_bound (lower
, end
, after
.c_str (),
4105 lookup_compare_lower
);
4108 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4111 return {lower
, upper
};
4114 /* See declaration. */
4117 mapped_index_base::build_name_components (dwarf2_per_objfile
*per_objfile
)
4119 if (!this->name_components
.empty ())
4122 this->name_components_casing
= case_sensitivity
;
4124 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4126 /* The code below only knows how to break apart components of C++
4127 symbol names (and other languages that use '::' as
4128 namespace/module separator) and Ada symbol names. */
4129 auto count
= this->symbol_name_count ();
4130 for (offset_type idx
= 0; idx
< count
; idx
++)
4132 if (this->symbol_name_slot_invalid (idx
))
4135 const char *name
= this->symbol_name_at (idx
, per_objfile
);
4137 /* Add each name component to the name component table. */
4138 unsigned int previous_len
= 0;
4140 if (strstr (name
, "::") != nullptr)
4142 for (unsigned int current_len
= cp_find_first_component (name
);
4143 name
[current_len
] != '\0';
4144 current_len
+= cp_find_first_component (name
+ current_len
))
4146 gdb_assert (name
[current_len
] == ':');
4147 this->name_components
.push_back ({previous_len
, idx
});
4148 /* Skip the '::'. */
4150 previous_len
= current_len
;
4155 /* Handle the Ada encoded (aka mangled) form here. */
4156 for (const char *iter
= strstr (name
, "__");
4158 iter
= strstr (iter
, "__"))
4160 this->name_components
.push_back ({previous_len
, idx
});
4162 previous_len
= iter
- name
;
4166 this->name_components
.push_back ({previous_len
, idx
});
4169 /* Sort name_components elements by name. */
4170 auto name_comp_compare
= [&] (const name_component
&left
,
4171 const name_component
&right
)
4173 const char *left_qualified
4174 = this->symbol_name_at (left
.idx
, per_objfile
);
4175 const char *right_qualified
4176 = this->symbol_name_at (right
.idx
, per_objfile
);
4178 const char *left_name
= left_qualified
+ left
.name_offset
;
4179 const char *right_name
= right_qualified
+ right
.name_offset
;
4181 return name_cmp (left_name
, right_name
) < 0;
4184 std::sort (this->name_components
.begin (),
4185 this->name_components
.end (),
4189 /* Helper for dw2_expand_symtabs_matching that works with a
4190 mapped_index_base instead of the containing objfile. This is split
4191 to a separate function in order to be able to unit test the
4192 name_components matching using a mock mapped_index_base. For each
4193 symbol name that matches, calls MATCH_CALLBACK, passing it the
4194 symbol's index in the mapped_index_base symbol table. */
4197 dw2_expand_symtabs_matching_symbol
4198 (mapped_index_base
&index
,
4199 const lookup_name_info
&lookup_name_in
,
4200 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4201 enum search_domain kind
,
4202 gdb::function_view
<bool (offset_type
)> match_callback
,
4203 dwarf2_per_objfile
*per_objfile
)
4205 lookup_name_info lookup_name_without_params
4206 = lookup_name_in
.make_ignore_params ();
4208 /* Build the symbol name component sorted vector, if we haven't
4210 index
.build_name_components (per_objfile
);
4212 /* The same symbol may appear more than once in the range though.
4213 E.g., if we're looking for symbols that complete "w", and we have
4214 a symbol named "w1::w2", we'll find the two name components for
4215 that same symbol in the range. To be sure we only call the
4216 callback once per symbol, we first collect the symbol name
4217 indexes that matched in a temporary vector and ignore
4219 std::vector
<offset_type
> matches
;
4221 struct name_and_matcher
4223 symbol_name_matcher_ftype
*matcher
;
4226 bool operator== (const name_and_matcher
&other
) const
4228 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
4232 /* A vector holding all the different symbol name matchers, for all
4234 std::vector
<name_and_matcher
> matchers
;
4236 for (int i
= 0; i
< nr_languages
; i
++)
4238 enum language lang_e
= (enum language
) i
;
4240 const language_defn
*lang
= language_def (lang_e
);
4241 symbol_name_matcher_ftype
*name_matcher
4242 = lang
->get_symbol_name_matcher (lookup_name_without_params
);
4244 name_and_matcher key
{
4246 lookup_name_without_params
.language_lookup_name (lang_e
)
4249 /* Don't insert the same comparison routine more than once.
4250 Note that we do this linear walk. This is not a problem in
4251 practice because the number of supported languages is
4253 if (std::find (matchers
.begin (), matchers
.end (), key
)
4256 matchers
.push_back (std::move (key
));
4259 = index
.find_name_components_bounds (lookup_name_without_params
,
4260 lang_e
, per_objfile
);
4262 /* Now for each symbol name in range, check to see if we have a name
4263 match, and if so, call the MATCH_CALLBACK callback. */
4265 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4267 const char *qualified
4268 = index
.symbol_name_at (bounds
.first
->idx
, per_objfile
);
4270 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4271 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4274 matches
.push_back (bounds
.first
->idx
);
4278 std::sort (matches
.begin (), matches
.end ());
4280 /* Finally call the callback, once per match. */
4282 for (offset_type idx
: matches
)
4286 if (!match_callback (idx
))
4292 /* Above we use a type wider than idx's for 'prev', since 0 and
4293 (offset_type)-1 are both possible values. */
4294 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4299 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4301 /* A mock .gdb_index/.debug_names-like name index table, enough to
4302 exercise dw2_expand_symtabs_matching_symbol, which works with the
4303 mapped_index_base interface. Builds an index from the symbol list
4304 passed as parameter to the constructor. */
4305 class mock_mapped_index
: public mapped_index_base
4308 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4309 : m_symbol_table (symbols
)
4312 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4314 /* Return the number of names in the symbol table. */
4315 size_t symbol_name_count () const override
4317 return m_symbol_table
.size ();
4320 /* Get the name of the symbol at IDX in the symbol table. */
4321 const char *symbol_name_at
4322 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
4324 return m_symbol_table
[idx
];
4328 gdb::array_view
<const char *> m_symbol_table
;
4331 /* Convenience function that converts a NULL pointer to a "<null>"
4332 string, to pass to print routines. */
4335 string_or_null (const char *str
)
4337 return str
!= NULL
? str
: "<null>";
4340 /* Check if a lookup_name_info built from
4341 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4342 index. EXPECTED_LIST is the list of expected matches, in expected
4343 matching order. If no match expected, then an empty list is
4344 specified. Returns true on success. On failure prints a warning
4345 indicating the file:line that failed, and returns false. */
4348 check_match (const char *file
, int line
,
4349 mock_mapped_index
&mock_index
,
4350 const char *name
, symbol_name_match_type match_type
,
4351 bool completion_mode
,
4352 std::initializer_list
<const char *> expected_list
,
4353 dwarf2_per_objfile
*per_objfile
)
4355 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4357 bool matched
= true;
4359 auto mismatch
= [&] (const char *expected_str
,
4362 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4363 "expected=\"%s\", got=\"%s\"\n"),
4365 (match_type
== symbol_name_match_type::FULL
4367 name
, string_or_null (expected_str
), string_or_null (got
));
4371 auto expected_it
= expected_list
.begin ();
4372 auto expected_end
= expected_list
.end ();
4374 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4376 [&] (offset_type idx
)
4378 const char *matched_name
= mock_index
.symbol_name_at (idx
, per_objfile
);
4379 const char *expected_str
4380 = expected_it
== expected_end
? NULL
: *expected_it
++;
4382 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4383 mismatch (expected_str
, matched_name
);
4387 const char *expected_str
4388 = expected_it
== expected_end
? NULL
: *expected_it
++;
4389 if (expected_str
!= NULL
)
4390 mismatch (expected_str
, NULL
);
4395 /* The symbols added to the mock mapped_index for testing (in
4397 static const char *test_symbols
[] = {
4406 "ns2::tmpl<int>::foo2",
4407 "(anonymous namespace)::A::B::C",
4409 /* These are used to check that the increment-last-char in the
4410 matching algorithm for completion doesn't match "t1_fund" when
4411 completing "t1_func". */
4417 /* A UTF-8 name with multi-byte sequences to make sure that
4418 cp-name-parser understands this as a single identifier ("função"
4419 is "function" in PT). */
4422 /* \377 (0xff) is Latin1 'ÿ'. */
4425 /* \377 (0xff) is Latin1 'ÿ'. */
4429 /* A name with all sorts of complications. Starts with "z" to make
4430 it easier for the completion tests below. */
4431 #define Z_SYM_NAME \
4432 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4433 "::tuple<(anonymous namespace)::ui*, " \
4434 "std::default_delete<(anonymous namespace)::ui>, void>"
4439 /* Returns true if the mapped_index_base::find_name_component_bounds
4440 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4441 in completion mode. */
4444 check_find_bounds_finds (mapped_index_base
&index
,
4445 const char *search_name
,
4446 gdb::array_view
<const char *> expected_syms
,
4447 dwarf2_per_objfile
*per_objfile
)
4449 lookup_name_info
lookup_name (search_name
,
4450 symbol_name_match_type::FULL
, true);
4452 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4456 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4457 if (distance
!= expected_syms
.size ())
4460 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4462 auto nc_elem
= bounds
.first
+ exp_elem
;
4463 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
, per_objfile
);
4464 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4471 /* Test the lower-level mapped_index::find_name_component_bounds
4475 test_mapped_index_find_name_component_bounds ()
4477 mock_mapped_index
mock_index (test_symbols
);
4479 mock_index
.build_name_components (NULL
/* per_objfile */);
4481 /* Test the lower-level mapped_index::find_name_component_bounds
4482 method in completion mode. */
4484 static const char *expected_syms
[] = {
4489 SELF_CHECK (check_find_bounds_finds
4490 (mock_index
, "t1_func", expected_syms
,
4491 NULL
/* per_objfile */));
4494 /* Check that the increment-last-char in the name matching algorithm
4495 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4497 static const char *expected_syms1
[] = {
4501 SELF_CHECK (check_find_bounds_finds
4502 (mock_index
, "\377", expected_syms1
, NULL
/* per_objfile */));
4504 static const char *expected_syms2
[] = {
4507 SELF_CHECK (check_find_bounds_finds
4508 (mock_index
, "\377\377", expected_syms2
,
4509 NULL
/* per_objfile */));
4513 /* Test dw2_expand_symtabs_matching_symbol. */
4516 test_dw2_expand_symtabs_matching_symbol ()
4518 mock_mapped_index
mock_index (test_symbols
);
4520 /* We let all tests run until the end even if some fails, for debug
4522 bool any_mismatch
= false;
4524 /* Create the expected symbols list (an initializer_list). Needed
4525 because lists have commas, and we need to pass them to CHECK,
4526 which is a macro. */
4527 #define EXPECT(...) { __VA_ARGS__ }
4529 /* Wrapper for check_match that passes down the current
4530 __FILE__/__LINE__. */
4531 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4532 any_mismatch |= !check_match (__FILE__, __LINE__, \
4534 NAME, MATCH_TYPE, COMPLETION_MODE, \
4535 EXPECTED_LIST, NULL)
4537 /* Identity checks. */
4538 for (const char *sym
: test_symbols
)
4540 /* Should be able to match all existing symbols. */
4541 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4544 /* Should be able to match all existing symbols with
4546 std::string with_params
= std::string (sym
) + "(int)";
4547 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4550 /* Should be able to match all existing symbols with
4551 parameters and qualifiers. */
4552 with_params
= std::string (sym
) + " ( int ) const";
4553 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4556 /* This should really find sym, but cp-name-parser.y doesn't
4557 know about lvalue/rvalue qualifiers yet. */
4558 with_params
= std::string (sym
) + " ( int ) &&";
4559 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4563 /* Check that the name matching algorithm for completion doesn't get
4564 confused with Latin1 'ÿ' / 0xff. */
4566 static const char str
[] = "\377";
4567 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4568 EXPECT ("\377", "\377\377123"));
4571 /* Check that the increment-last-char in the matching algorithm for
4572 completion doesn't match "t1_fund" when completing "t1_func". */
4574 static const char str
[] = "t1_func";
4575 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4576 EXPECT ("t1_func", "t1_func1"));
4579 /* Check that completion mode works at each prefix of the expected
4582 static const char str
[] = "function(int)";
4583 size_t len
= strlen (str
);
4586 for (size_t i
= 1; i
< len
; i
++)
4588 lookup
.assign (str
, i
);
4589 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4590 EXPECT ("function"));
4594 /* While "w" is a prefix of both components, the match function
4595 should still only be called once. */
4597 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4599 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4603 /* Same, with a "complicated" symbol. */
4605 static const char str
[] = Z_SYM_NAME
;
4606 size_t len
= strlen (str
);
4609 for (size_t i
= 1; i
< len
; i
++)
4611 lookup
.assign (str
, i
);
4612 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4613 EXPECT (Z_SYM_NAME
));
4617 /* In FULL mode, an incomplete symbol doesn't match. */
4619 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4623 /* A complete symbol with parameters matches any overload, since the
4624 index has no overload info. */
4626 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4627 EXPECT ("std::zfunction", "std::zfunction2"));
4628 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4629 EXPECT ("std::zfunction", "std::zfunction2"));
4630 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4631 EXPECT ("std::zfunction", "std::zfunction2"));
4634 /* Check that whitespace is ignored appropriately. A symbol with a
4635 template argument list. */
4637 static const char expected
[] = "ns::foo<int>";
4638 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4640 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4644 /* Check that whitespace is ignored appropriately. A symbol with a
4645 template argument list that includes a pointer. */
4647 static const char expected
[] = "ns::foo<char*>";
4648 /* Try both completion and non-completion modes. */
4649 static const bool completion_mode
[2] = {false, true};
4650 for (size_t i
= 0; i
< 2; i
++)
4652 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4653 completion_mode
[i
], EXPECT (expected
));
4654 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4655 completion_mode
[i
], EXPECT (expected
));
4657 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4658 completion_mode
[i
], EXPECT (expected
));
4659 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4660 completion_mode
[i
], EXPECT (expected
));
4665 /* Check method qualifiers are ignored. */
4666 static const char expected
[] = "ns::foo<char*>";
4667 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4668 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4669 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4670 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4671 CHECK_MATCH ("foo < char * > ( int ) const",
4672 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4673 CHECK_MATCH ("foo < char * > ( int ) &&",
4674 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4677 /* Test lookup names that don't match anything. */
4679 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4682 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4686 /* Some wild matching tests, exercising "(anonymous namespace)",
4687 which should not be confused with a parameter list. */
4689 static const char *syms
[] = {
4693 "A :: B :: C ( int )",
4698 for (const char *s
: syms
)
4700 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4701 EXPECT ("(anonymous namespace)::A::B::C"));
4706 static const char expected
[] = "ns2::tmpl<int>::foo2";
4707 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4709 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4713 SELF_CHECK (!any_mismatch
);
4722 test_mapped_index_find_name_component_bounds ();
4723 test_dw2_expand_symtabs_matching_symbol ();
4726 }} // namespace selftests::dw2_expand_symtabs_matching
4728 #endif /* GDB_SELF_TEST */
4730 /* If FILE_MATCHER is NULL or if PER_CU has
4731 dwarf2_per_cu_quick_data::MARK set (see
4732 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4733 EXPANSION_NOTIFY on it. */
4736 dw2_expand_symtabs_matching_one
4737 (dwarf2_per_cu_data
*per_cu
,
4738 dwarf2_per_objfile
*per_objfile
,
4739 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4740 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4742 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4744 bool symtab_was_null
= !per_objfile
->symtab_set_p (per_cu
);
4746 compunit_symtab
*symtab
4747 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
4748 gdb_assert (symtab
!= nullptr);
4750 if (expansion_notify
!= NULL
&& symtab_was_null
)
4751 expansion_notify (symtab
);
4755 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4756 matched, to expand corresponding CUs that were marked. IDX is the
4757 index of the symbol name that matched. */
4760 dw2_expand_marked_cus
4761 (dwarf2_per_objfile
*per_objfile
, offset_type idx
,
4762 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4763 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4766 offset_type
*vec
, vec_len
, vec_idx
;
4767 bool global_seen
= false;
4768 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
4770 vec
= (offset_type
*) (index
.constant_pool
4771 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4772 vec_len
= MAYBE_SWAP (vec
[0]);
4773 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4775 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4776 /* This value is only valid for index versions >= 7. */
4777 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4778 gdb_index_symbol_kind symbol_kind
=
4779 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4780 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4781 /* Only check the symbol attributes if they're present.
4782 Indices prior to version 7 don't record them,
4783 and indices >= 7 may elide them for certain symbols
4784 (gold does this). */
4787 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4789 /* Work around gold/15646. */
4792 && symbol_kind
== GDB_INDEX_SYMBOL_KIND_TYPE
)
4800 /* Only check the symbol's kind if it has one. */
4805 case VARIABLES_DOMAIN
:
4806 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4809 case FUNCTIONS_DOMAIN
:
4810 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4814 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4817 case MODULES_DOMAIN
:
4818 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4826 /* Don't crash on bad data. */
4827 if (cu_index
>= (per_objfile
->per_bfd
->all_comp_units
.size ()
4828 + per_objfile
->per_bfd
->all_type_units
.size ()))
4830 complaint (_(".gdb_index entry has bad CU index"
4831 " [in module %s]"), objfile_name (per_objfile
->objfile
));
4835 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (cu_index
);
4836 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
4841 /* If FILE_MATCHER is non-NULL, set all the
4842 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4843 that match FILE_MATCHER. */
4846 dw_expand_symtabs_matching_file_matcher
4847 (dwarf2_per_objfile
*per_objfile
,
4848 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4850 if (file_matcher
== NULL
)
4853 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4855 NULL
, xcalloc
, xfree
));
4856 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4858 NULL
, xcalloc
, xfree
));
4860 /* The rule is CUs specify all the files, including those used by
4861 any TU, so there's no need to scan TUs here. */
4863 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4867 per_cu
->v
.quick
->mark
= 0;
4869 /* We only need to look at symtabs not already expanded. */
4870 if (per_objfile
->symtab_set_p (per_cu
))
4873 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
4874 if (file_data
== NULL
)
4877 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4879 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4881 per_cu
->v
.quick
->mark
= 1;
4885 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4887 const char *this_real_name
;
4889 if (file_matcher (file_data
->file_names
[j
], false))
4891 per_cu
->v
.quick
->mark
= 1;
4895 /* Before we invoke realpath, which can get expensive when many
4896 files are involved, do a quick comparison of the basenames. */
4897 if (!basenames_may_differ
4898 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4902 this_real_name
= dw2_get_real_path (per_objfile
, file_data
, j
);
4903 if (file_matcher (this_real_name
, false))
4905 per_cu
->v
.quick
->mark
= 1;
4910 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4911 ? visited_found
.get ()
4912 : visited_not_found
.get (),
4919 dw2_expand_symtabs_matching
4920 (struct objfile
*objfile
,
4921 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4922 const lookup_name_info
*lookup_name
,
4923 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4924 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4925 enum search_domain kind
)
4927 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4929 /* index_table is NULL if OBJF_READNOW. */
4930 if (!per_objfile
->per_bfd
->index_table
)
4933 dw_expand_symtabs_matching_file_matcher (per_objfile
, file_matcher
);
4935 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4937 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4941 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
,
4942 file_matcher
, expansion_notify
);
4947 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
4949 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4951 kind
, [&] (offset_type idx
)
4953 dw2_expand_marked_cus (per_objfile
, idx
, file_matcher
, expansion_notify
,
4959 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4962 static struct compunit_symtab
*
4963 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4968 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4969 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4972 if (cust
->includes
== NULL
)
4975 for (i
= 0; cust
->includes
[i
]; ++i
)
4977 struct compunit_symtab
*s
= cust
->includes
[i
];
4979 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4987 static struct compunit_symtab
*
4988 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4989 struct bound_minimal_symbol msymbol
,
4991 struct obj_section
*section
,
4994 struct dwarf2_per_cu_data
*data
;
4995 struct compunit_symtab
*result
;
4997 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5000 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
5001 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5002 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5006 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5007 if (warn_if_readin
&& per_objfile
->symtab_set_p (data
))
5008 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5009 paddress (objfile
->arch (), pc
));
5011 result
= recursively_find_pc_sect_compunit_symtab
5012 (dw2_instantiate_symtab (data
, per_objfile
, false), pc
);
5014 gdb_assert (result
!= NULL
);
5019 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5020 void *data
, int need_fullname
)
5022 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5024 if (!per_objfile
->per_bfd
->filenames_cache
)
5026 per_objfile
->per_bfd
->filenames_cache
.emplace ();
5028 htab_up
visited (htab_create_alloc (10,
5029 htab_hash_pointer
, htab_eq_pointer
,
5030 NULL
, xcalloc
, xfree
));
5032 /* The rule is CUs specify all the files, including those used
5033 by any TU, so there's no need to scan TUs here. We can
5034 ignore file names coming from already-expanded CUs. */
5036 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5038 if (per_objfile
->symtab_set_p (per_cu
))
5040 void **slot
= htab_find_slot (visited
.get (),
5041 per_cu
->v
.quick
->file_names
,
5044 *slot
= per_cu
->v
.quick
->file_names
;
5048 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5050 /* We only need to look at symtabs not already expanded. */
5051 if (per_objfile
->symtab_set_p (per_cu
))
5054 quick_file_names
*file_data
5055 = dw2_get_file_names (per_cu
, per_objfile
);
5056 if (file_data
== NULL
)
5059 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5062 /* Already visited. */
5067 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5069 const char *filename
= file_data
->file_names
[j
];
5070 per_objfile
->per_bfd
->filenames_cache
->seen (filename
);
5075 per_objfile
->per_bfd
->filenames_cache
->traverse ([&] (const char *filename
)
5077 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5080 this_real_name
= gdb_realpath (filename
);
5081 (*fun
) (filename
, this_real_name
.get (), data
);
5086 dw2_has_symbols (struct objfile
*objfile
)
5091 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5094 dw2_find_last_source_symtab
,
5095 dw2_forget_cached_source_info
,
5096 dw2_map_symtabs_matching_filename
,
5101 dw2_expand_symtabs_for_function
,
5102 dw2_expand_all_symtabs
,
5103 dw2_expand_symtabs_with_fullname
,
5104 dw2_map_matching_symbols
,
5105 dw2_expand_symtabs_matching
,
5106 dw2_find_pc_sect_compunit_symtab
,
5108 dw2_map_symbol_filenames
5111 /* DWARF-5 debug_names reader. */
5113 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5114 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5116 /* A helper function that reads the .debug_names section in SECTION
5117 and fills in MAP. FILENAME is the name of the file containing the
5118 section; it is used for error reporting.
5120 Returns true if all went well, false otherwise. */
5123 read_debug_names_from_section (struct objfile
*objfile
,
5124 const char *filename
,
5125 struct dwarf2_section_info
*section
,
5126 mapped_debug_names
&map
)
5128 if (section
->empty ())
5131 /* Older elfutils strip versions could keep the section in the main
5132 executable while splitting it for the separate debug info file. */
5133 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5136 section
->read (objfile
);
5138 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
5140 const gdb_byte
*addr
= section
->buffer
;
5142 bfd
*const abfd
= section
->get_bfd_owner ();
5144 unsigned int bytes_read
;
5145 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5148 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5149 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5150 if (bytes_read
+ length
!= section
->size
)
5152 /* There may be multiple per-CU indices. */
5153 warning (_("Section .debug_names in %s length %s does not match "
5154 "section length %s, ignoring .debug_names."),
5155 filename
, plongest (bytes_read
+ length
),
5156 pulongest (section
->size
));
5160 /* The version number. */
5161 uint16_t version
= read_2_bytes (abfd
, addr
);
5165 warning (_("Section .debug_names in %s has unsupported version %d, "
5166 "ignoring .debug_names."),
5172 uint16_t padding
= read_2_bytes (abfd
, addr
);
5176 warning (_("Section .debug_names in %s has unsupported padding %d, "
5177 "ignoring .debug_names."),
5182 /* comp_unit_count - The number of CUs in the CU list. */
5183 map
.cu_count
= read_4_bytes (abfd
, addr
);
5186 /* local_type_unit_count - The number of TUs in the local TU
5188 map
.tu_count
= read_4_bytes (abfd
, addr
);
5191 /* foreign_type_unit_count - The number of TUs in the foreign TU
5193 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5195 if (foreign_tu_count
!= 0)
5197 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5198 "ignoring .debug_names."),
5199 filename
, static_cast<unsigned long> (foreign_tu_count
));
5203 /* bucket_count - The number of hash buckets in the hash lookup
5205 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5208 /* name_count - The number of unique names in the index. */
5209 map
.name_count
= read_4_bytes (abfd
, addr
);
5212 /* abbrev_table_size - The size in bytes of the abbreviations
5214 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5217 /* augmentation_string_size - The size in bytes of the augmentation
5218 string. This value is rounded up to a multiple of 4. */
5219 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5221 map
.augmentation_is_gdb
= ((augmentation_string_size
5222 == sizeof (dwarf5_augmentation
))
5223 && memcmp (addr
, dwarf5_augmentation
,
5224 sizeof (dwarf5_augmentation
)) == 0);
5225 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5226 addr
+= augmentation_string_size
;
5229 map
.cu_table_reordered
= addr
;
5230 addr
+= map
.cu_count
* map
.offset_size
;
5232 /* List of Local TUs */
5233 map
.tu_table_reordered
= addr
;
5234 addr
+= map
.tu_count
* map
.offset_size
;
5236 /* Hash Lookup Table */
5237 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5238 addr
+= map
.bucket_count
* 4;
5239 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5240 addr
+= map
.name_count
* 4;
5243 map
.name_table_string_offs_reordered
= addr
;
5244 addr
+= map
.name_count
* map
.offset_size
;
5245 map
.name_table_entry_offs_reordered
= addr
;
5246 addr
+= map
.name_count
* map
.offset_size
;
5248 const gdb_byte
*abbrev_table_start
= addr
;
5251 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5256 const auto insertpair
5257 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5258 if (!insertpair
.second
)
5260 warning (_("Section .debug_names in %s has duplicate index %s, "
5261 "ignoring .debug_names."),
5262 filename
, pulongest (index_num
));
5265 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5266 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5271 mapped_debug_names::index_val::attr attr
;
5272 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5274 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5276 if (attr
.form
== DW_FORM_implicit_const
)
5278 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5282 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5284 indexval
.attr_vec
.push_back (std::move (attr
));
5287 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5289 warning (_("Section .debug_names in %s has abbreviation_table "
5290 "of size %s vs. written as %u, ignoring .debug_names."),
5291 filename
, plongest (addr
- abbrev_table_start
),
5295 map
.entry_pool
= addr
;
5300 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5304 create_cus_from_debug_names_list (dwarf2_per_bfd
*per_bfd
,
5305 const mapped_debug_names
&map
,
5306 dwarf2_section_info
§ion
,
5309 if (!map
.augmentation_is_gdb
)
5311 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5313 sect_offset sect_off
5314 = (sect_offset
) (extract_unsigned_integer
5315 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5317 map
.dwarf5_byte_order
));
5318 /* We don't know the length of the CU, because the CU list in a
5319 .debug_names index can be incomplete, so we can't use the start of
5320 the next CU as end of this CU. We create the CUs here with length 0,
5321 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5322 dwarf2_per_cu_data
*per_cu
5323 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
, sect_off
, 0);
5324 per_bfd
->all_comp_units
.push_back (per_cu
);
5328 sect_offset sect_off_prev
;
5329 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5331 sect_offset sect_off_next
;
5332 if (i
< map
.cu_count
)
5335 = (sect_offset
) (extract_unsigned_integer
5336 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5338 map
.dwarf5_byte_order
));
5341 sect_off_next
= (sect_offset
) section
.size
;
5344 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5345 dwarf2_per_cu_data
*per_cu
5346 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
,
5347 sect_off_prev
, length
);
5348 per_bfd
->all_comp_units
.push_back (per_cu
);
5350 sect_off_prev
= sect_off_next
;
5354 /* Read the CU list from the mapped index, and use it to create all
5355 the CU objects for this dwarf2_per_objfile. */
5358 create_cus_from_debug_names (dwarf2_per_bfd
*per_bfd
,
5359 const mapped_debug_names
&map
,
5360 const mapped_debug_names
&dwz_map
)
5362 gdb_assert (per_bfd
->all_comp_units
.empty ());
5363 per_bfd
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5365 create_cus_from_debug_names_list (per_bfd
, map
, per_bfd
->info
,
5366 false /* is_dwz */);
5368 if (dwz_map
.cu_count
== 0)
5371 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
5372 create_cus_from_debug_names_list (per_bfd
, dwz_map
, dwz
->info
,
5376 /* Read .debug_names. If everything went ok, initialize the "quick"
5377 elements of all the CUs and return true. Otherwise, return false. */
5380 dwarf2_read_debug_names (dwarf2_per_objfile
*per_objfile
)
5382 std::unique_ptr
<mapped_debug_names
> map (new mapped_debug_names
);
5383 mapped_debug_names dwz_map
;
5384 struct objfile
*objfile
= per_objfile
->objfile
;
5385 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
5387 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5388 &per_objfile
->per_bfd
->debug_names
, *map
))
5391 /* Don't use the index if it's empty. */
5392 if (map
->name_count
== 0)
5395 /* If there is a .dwz file, read it so we can get its CU list as
5397 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
5400 if (!read_debug_names_from_section (objfile
,
5401 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5402 &dwz
->debug_names
, dwz_map
))
5404 warning (_("could not read '.debug_names' section from %s; skipping"),
5405 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5410 create_cus_from_debug_names (per_bfd
, *map
, dwz_map
);
5412 if (map
->tu_count
!= 0)
5414 /* We can only handle a single .debug_types when we have an
5416 if (per_bfd
->types
.size () != 1)
5419 dwarf2_section_info
*section
= &per_bfd
->types
[0];
5421 create_signatured_type_table_from_debug_names
5422 (per_objfile
, *map
, section
, &per_bfd
->abbrev
);
5425 create_addrmap_from_aranges (per_objfile
, &per_bfd
->debug_aranges
);
5427 per_bfd
->debug_names_table
= std::move (map
);
5428 per_bfd
->using_index
= 1;
5429 per_bfd
->quick_file_names_table
=
5430 create_quick_file_names_table (per_objfile
->per_bfd
->all_comp_units
.size ());
5432 /* Save partial symtabs in the per_bfd object, for the benefit of subsequent
5433 objfiles using the same BFD. */
5434 gdb_assert (per_bfd
->partial_symtabs
== nullptr);
5435 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
5440 /* Type used to manage iterating over all CUs looking for a symbol for
5443 class dw2_debug_names_iterator
5446 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5447 gdb::optional
<block_enum
> block_index
,
5449 const char *name
, dwarf2_per_objfile
*per_objfile
)
5450 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5451 m_addr (find_vec_in_debug_names (map
, name
, per_objfile
)),
5452 m_per_objfile (per_objfile
)
5455 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5456 search_domain search
, uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5459 m_addr (find_vec_in_debug_names (map
, namei
, per_objfile
)),
5460 m_per_objfile (per_objfile
)
5463 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5464 block_enum block_index
, domain_enum domain
,
5465 uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5466 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5467 m_addr (find_vec_in_debug_names (map
, namei
, per_objfile
)),
5468 m_per_objfile (per_objfile
)
5471 /* Return the next matching CU or NULL if there are no more. */
5472 dwarf2_per_cu_data
*next ();
5475 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5477 dwarf2_per_objfile
*per_objfile
);
5478 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5480 dwarf2_per_objfile
*per_objfile
);
5482 /* The internalized form of .debug_names. */
5483 const mapped_debug_names
&m_map
;
5485 /* If set, only look for symbols that match that block. Valid values are
5486 GLOBAL_BLOCK and STATIC_BLOCK. */
5487 const gdb::optional
<block_enum
> m_block_index
;
5489 /* The kind of symbol we're looking for. */
5490 const domain_enum m_domain
= UNDEF_DOMAIN
;
5491 const search_domain m_search
= ALL_DOMAIN
;
5493 /* The list of CUs from the index entry of the symbol, or NULL if
5495 const gdb_byte
*m_addr
;
5497 dwarf2_per_objfile
*m_per_objfile
;
5501 mapped_debug_names::namei_to_name
5502 (uint32_t namei
, dwarf2_per_objfile
*per_objfile
) const
5504 const ULONGEST namei_string_offs
5505 = extract_unsigned_integer ((name_table_string_offs_reordered
5506 + namei
* offset_size
),
5509 return read_indirect_string_at_offset (per_objfile
, namei_string_offs
);
5512 /* Find a slot in .debug_names for the object named NAME. If NAME is
5513 found, return pointer to its pool data. If NAME cannot be found,
5517 dw2_debug_names_iterator::find_vec_in_debug_names
5518 (const mapped_debug_names
&map
, const char *name
,
5519 dwarf2_per_objfile
*per_objfile
)
5521 int (*cmp
) (const char *, const char *);
5523 gdb::unique_xmalloc_ptr
<char> without_params
;
5524 if (current_language
->la_language
== language_cplus
5525 || current_language
->la_language
== language_fortran
5526 || current_language
->la_language
== language_d
)
5528 /* NAME is already canonical. Drop any qualifiers as
5529 .debug_names does not contain any. */
5531 if (strchr (name
, '(') != NULL
)
5533 without_params
= cp_remove_params (name
);
5534 if (without_params
!= NULL
)
5535 name
= without_params
.get ();
5539 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5541 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5543 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5544 (map
.bucket_table_reordered
5545 + (full_hash
% map
.bucket_count
)), 4,
5546 map
.dwarf5_byte_order
);
5550 if (namei
>= map
.name_count
)
5552 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5554 namei
, map
.name_count
,
5555 objfile_name (per_objfile
->objfile
));
5561 const uint32_t namei_full_hash
5562 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5563 (map
.hash_table_reordered
+ namei
), 4,
5564 map
.dwarf5_byte_order
);
5565 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5568 if (full_hash
== namei_full_hash
)
5570 const char *const namei_string
= map
.namei_to_name (namei
, per_objfile
);
5572 #if 0 /* An expensive sanity check. */
5573 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5575 complaint (_("Wrong .debug_names hash for string at index %u "
5577 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5582 if (cmp (namei_string
, name
) == 0)
5584 const ULONGEST namei_entry_offs
5585 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5586 + namei
* map
.offset_size
),
5587 map
.offset_size
, map
.dwarf5_byte_order
);
5588 return map
.entry_pool
+ namei_entry_offs
;
5593 if (namei
>= map
.name_count
)
5599 dw2_debug_names_iterator::find_vec_in_debug_names
5600 (const mapped_debug_names
&map
, uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5602 if (namei
>= map
.name_count
)
5604 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5606 namei
, map
.name_count
,
5607 objfile_name (per_objfile
->objfile
));
5611 const ULONGEST namei_entry_offs
5612 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5613 + namei
* map
.offset_size
),
5614 map
.offset_size
, map
.dwarf5_byte_order
);
5615 return map
.entry_pool
+ namei_entry_offs
;
5618 /* See dw2_debug_names_iterator. */
5620 dwarf2_per_cu_data
*
5621 dw2_debug_names_iterator::next ()
5626 dwarf2_per_bfd
*per_bfd
= m_per_objfile
->per_bfd
;
5627 struct objfile
*objfile
= m_per_objfile
->objfile
;
5628 bfd
*const abfd
= objfile
->obfd
;
5632 unsigned int bytes_read
;
5633 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5634 m_addr
+= bytes_read
;
5638 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5639 if (indexval_it
== m_map
.abbrev_map
.cend ())
5641 complaint (_("Wrong .debug_names undefined abbrev code %s "
5643 pulongest (abbrev
), objfile_name (objfile
));
5646 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5647 enum class symbol_linkage
{
5651 } symbol_linkage_
= symbol_linkage::unknown
;
5652 dwarf2_per_cu_data
*per_cu
= NULL
;
5653 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5658 case DW_FORM_implicit_const
:
5659 ull
= attr
.implicit_const
;
5661 case DW_FORM_flag_present
:
5665 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5666 m_addr
+= bytes_read
;
5669 ull
= read_4_bytes (abfd
, m_addr
);
5673 ull
= read_8_bytes (abfd
, m_addr
);
5676 case DW_FORM_ref_sig8
:
5677 ull
= read_8_bytes (abfd
, m_addr
);
5681 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5682 dwarf_form_name (attr
.form
),
5683 objfile_name (objfile
));
5686 switch (attr
.dw_idx
)
5688 case DW_IDX_compile_unit
:
5689 /* Don't crash on bad data. */
5690 if (ull
>= m_per_objfile
->per_bfd
->all_comp_units
.size ())
5692 complaint (_(".debug_names entry has bad CU index %s"
5695 objfile_name (objfile
));
5698 per_cu
= per_bfd
->get_cutu (ull
);
5700 case DW_IDX_type_unit
:
5701 /* Don't crash on bad data. */
5702 if (ull
>= per_bfd
->all_type_units
.size ())
5704 complaint (_(".debug_names entry has bad TU index %s"
5707 objfile_name (objfile
));
5710 per_cu
= &per_bfd
->get_tu (ull
)->per_cu
;
5712 case DW_IDX_die_offset
:
5713 /* In a per-CU index (as opposed to a per-module index), index
5714 entries without CU attribute implicitly refer to the single CU. */
5716 per_cu
= per_bfd
->get_cu (0);
5718 case DW_IDX_GNU_internal
:
5719 if (!m_map
.augmentation_is_gdb
)
5721 symbol_linkage_
= symbol_linkage::static_
;
5723 case DW_IDX_GNU_external
:
5724 if (!m_map
.augmentation_is_gdb
)
5726 symbol_linkage_
= symbol_linkage::extern_
;
5731 /* Skip if already read in. */
5732 if (m_per_objfile
->symtab_set_p (per_cu
))
5735 /* Check static vs global. */
5736 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5738 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5739 const bool symbol_is_static
=
5740 symbol_linkage_
== symbol_linkage::static_
;
5741 if (want_static
!= symbol_is_static
)
5745 /* Match dw2_symtab_iter_next, symbol_kind
5746 and debug_names::psymbol_tag. */
5750 switch (indexval
.dwarf_tag
)
5752 case DW_TAG_variable
:
5753 case DW_TAG_subprogram
:
5754 /* Some types are also in VAR_DOMAIN. */
5755 case DW_TAG_typedef
:
5756 case DW_TAG_structure_type
:
5763 switch (indexval
.dwarf_tag
)
5765 case DW_TAG_typedef
:
5766 case DW_TAG_structure_type
:
5773 switch (indexval
.dwarf_tag
)
5776 case DW_TAG_variable
:
5783 switch (indexval
.dwarf_tag
)
5795 /* Match dw2_expand_symtabs_matching, symbol_kind and
5796 debug_names::psymbol_tag. */
5799 case VARIABLES_DOMAIN
:
5800 switch (indexval
.dwarf_tag
)
5802 case DW_TAG_variable
:
5808 case FUNCTIONS_DOMAIN
:
5809 switch (indexval
.dwarf_tag
)
5811 case DW_TAG_subprogram
:
5818 switch (indexval
.dwarf_tag
)
5820 case DW_TAG_typedef
:
5821 case DW_TAG_structure_type
:
5827 case MODULES_DOMAIN
:
5828 switch (indexval
.dwarf_tag
)
5842 static struct compunit_symtab
*
5843 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5844 const char *name
, domain_enum domain
)
5846 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5848 const auto &mapp
= per_objfile
->per_bfd
->debug_names_table
;
5851 /* index is NULL if OBJF_READNOW. */
5854 const auto &map
= *mapp
;
5856 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
, per_objfile
);
5858 struct compunit_symtab
*stab_best
= NULL
;
5859 struct dwarf2_per_cu_data
*per_cu
;
5860 while ((per_cu
= iter
.next ()) != NULL
)
5862 struct symbol
*sym
, *with_opaque
= NULL
;
5863 compunit_symtab
*stab
5864 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
5865 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5866 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5868 sym
= block_find_symbol (block
, name
, domain
,
5869 block_find_non_opaque_type_preferred
,
5872 /* Some caution must be observed with overloaded functions and
5873 methods, since the index will not contain any overload
5874 information (but NAME might contain it). */
5877 && strcmp_iw (sym
->search_name (), name
) == 0)
5879 if (with_opaque
!= NULL
5880 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5883 /* Keep looking through other CUs. */
5889 /* This dumps minimal information about .debug_names. It is called
5890 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5891 uses this to verify that .debug_names has been loaded. */
5894 dw2_debug_names_dump (struct objfile
*objfile
)
5896 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5898 gdb_assert (per_objfile
->per_bfd
->using_index
);
5899 printf_filtered (".debug_names:");
5900 if (per_objfile
->per_bfd
->debug_names_table
)
5901 printf_filtered (" exists\n");
5903 printf_filtered (" faked for \"readnow\"\n");
5904 printf_filtered ("\n");
5908 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5909 const char *func_name
)
5911 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5913 /* per_objfile->per_bfd->debug_names_table is NULL if OBJF_READNOW. */
5914 if (per_objfile
->per_bfd
->debug_names_table
)
5916 const mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
5918 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
,
5921 struct dwarf2_per_cu_data
*per_cu
;
5922 while ((per_cu
= iter
.next ()) != NULL
)
5923 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
5928 dw2_debug_names_map_matching_symbols
5929 (struct objfile
*objfile
,
5930 const lookup_name_info
&name
, domain_enum domain
,
5932 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5933 symbol_compare_ftype
*ordered_compare
)
5935 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5937 /* debug_names_table is NULL if OBJF_READNOW. */
5938 if (!per_objfile
->per_bfd
->debug_names_table
)
5941 mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
5942 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5944 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5945 auto matcher
= [&] (const char *symname
)
5947 if (ordered_compare
== nullptr)
5949 return ordered_compare (symname
, match_name
) == 0;
5952 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5953 [&] (offset_type namei
)
5955 /* The name was matched, now expand corresponding CUs that were
5957 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
,
5960 struct dwarf2_per_cu_data
*per_cu
;
5961 while ((per_cu
= iter
.next ()) != NULL
)
5962 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, nullptr,
5967 /* It's a shame we couldn't do this inside the
5968 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5969 that have already been expanded. Instead, this loop matches what
5970 the psymtab code does. */
5971 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5973 compunit_symtab
*symtab
= per_objfile
->get_symtab (per_cu
);
5974 if (symtab
!= nullptr)
5976 const struct block
*block
5977 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (symtab
), block_kind
);
5978 if (!iterate_over_symbols_terminated (block
, name
,
5986 dw2_debug_names_expand_symtabs_matching
5987 (struct objfile
*objfile
,
5988 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5989 const lookup_name_info
*lookup_name
,
5990 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5991 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5992 enum search_domain kind
)
5994 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5996 /* debug_names_table is NULL if OBJF_READNOW. */
5997 if (!per_objfile
->per_bfd
->debug_names_table
)
6000 dw_expand_symtabs_matching_file_matcher (per_objfile
, file_matcher
);
6002 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
6004 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
6008 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
6014 mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
6016 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
6018 kind
, [&] (offset_type namei
)
6020 /* The name was matched, now expand corresponding CUs that were
6022 dw2_debug_names_iterator
iter (map
, kind
, namei
, per_objfile
);
6024 struct dwarf2_per_cu_data
*per_cu
;
6025 while ((per_cu
= iter
.next ()) != NULL
)
6026 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
6032 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6035 dw2_find_last_source_symtab
,
6036 dw2_forget_cached_source_info
,
6037 dw2_map_symtabs_matching_filename
,
6038 dw2_debug_names_lookup_symbol
,
6041 dw2_debug_names_dump
,
6042 dw2_debug_names_expand_symtabs_for_function
,
6043 dw2_expand_all_symtabs
,
6044 dw2_expand_symtabs_with_fullname
,
6045 dw2_debug_names_map_matching_symbols
,
6046 dw2_debug_names_expand_symtabs_matching
,
6047 dw2_find_pc_sect_compunit_symtab
,
6049 dw2_map_symbol_filenames
6052 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6053 to either a dwarf2_per_bfd or dwz_file object. */
6055 template <typename T
>
6056 static gdb::array_view
<const gdb_byte
>
6057 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6059 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6061 if (section
->empty ())
6064 /* Older elfutils strip versions could keep the section in the main
6065 executable while splitting it for the separate debug info file. */
6066 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
6069 section
->read (obj
);
6071 /* dwarf2_section_info::size is a bfd_size_type, while
6072 gdb::array_view works with size_t. On 32-bit hosts, with
6073 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6074 is 32-bit. So we need an explicit narrowing conversion here.
6075 This is fine, because it's impossible to allocate or mmap an
6076 array/buffer larger than what size_t can represent. */
6077 return gdb::make_array_view (section
->buffer
, section
->size
);
6080 /* Lookup the index cache for the contents of the index associated to
6083 static gdb::array_view
<const gdb_byte
>
6084 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_bfd
*dwarf2_per_bfd
)
6086 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6087 if (build_id
== nullptr)
6090 return global_index_cache
.lookup_gdb_index (build_id
,
6091 &dwarf2_per_bfd
->index_cache_res
);
6094 /* Same as the above, but for DWZ. */
6096 static gdb::array_view
<const gdb_byte
>
6097 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6099 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6100 if (build_id
== nullptr)
6103 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6106 /* See symfile.h. */
6109 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6111 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
6112 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6114 /* If we're about to read full symbols, don't bother with the
6115 indices. In this case we also don't care if some other debug
6116 format is making psymtabs, because they are all about to be
6118 if ((objfile
->flags
& OBJF_READNOW
))
6120 /* When using READNOW, the using_index flag (set below) indicates that
6121 PER_BFD was already initialized, when we loaded some other objfile. */
6122 if (per_bfd
->using_index
)
6124 *index_kind
= dw_index_kind::GDB_INDEX
;
6125 per_objfile
->resize_symtabs ();
6129 per_bfd
->using_index
= 1;
6130 create_all_comp_units (per_objfile
);
6131 create_all_type_units (per_objfile
);
6132 per_bfd
->quick_file_names_table
6133 = create_quick_file_names_table (per_bfd
->all_comp_units
.size ());
6134 per_objfile
->resize_symtabs ();
6136 for (int i
= 0; i
< (per_bfd
->all_comp_units
.size ()
6137 + per_bfd
->all_type_units
.size ()); ++i
)
6139 dwarf2_per_cu_data
*per_cu
= per_bfd
->get_cutu (i
);
6141 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
6142 struct dwarf2_per_cu_quick_data
);
6145 /* Return 1 so that gdb sees the "quick" functions. However,
6146 these functions will be no-ops because we will have expanded
6148 *index_kind
= dw_index_kind::GDB_INDEX
;
6152 /* Was a debug names index already read when we processed an objfile sharing
6154 if (per_bfd
->debug_names_table
!= nullptr)
6156 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6157 per_objfile
->objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6158 per_objfile
->resize_symtabs ();
6162 /* Was a GDB index already read when we processed an objfile sharing
6164 if (per_bfd
->index_table
!= nullptr)
6166 *index_kind
= dw_index_kind::GDB_INDEX
;
6167 per_objfile
->objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6168 per_objfile
->resize_symtabs ();
6172 /* There might already be partial symtabs built for this BFD. This happens
6173 when loading the same binary twice with the index-cache enabled. If so,
6174 don't try to read an index. The objfile / per_objfile initialization will
6175 be completed in dwarf2_build_psymtabs, in the standard partial symtabs
6177 if (per_bfd
->partial_symtabs
!= nullptr)
6180 if (dwarf2_read_debug_names (per_objfile
))
6182 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6183 per_objfile
->resize_symtabs ();
6187 if (dwarf2_read_gdb_index (per_objfile
,
6188 get_gdb_index_contents_from_section
<struct dwarf2_per_bfd
>,
6189 get_gdb_index_contents_from_section
<dwz_file
>))
6191 *index_kind
= dw_index_kind::GDB_INDEX
;
6192 per_objfile
->resize_symtabs ();
6196 /* ... otherwise, try to find the index in the index cache. */
6197 if (dwarf2_read_gdb_index (per_objfile
,
6198 get_gdb_index_contents_from_cache
,
6199 get_gdb_index_contents_from_cache_dwz
))
6201 global_index_cache
.hit ();
6202 *index_kind
= dw_index_kind::GDB_INDEX
;
6203 per_objfile
->resize_symtabs ();
6207 global_index_cache
.miss ();
6213 /* Build a partial symbol table. */
6216 dwarf2_build_psymtabs (struct objfile
*objfile
)
6218 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
6219 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6221 if (per_bfd
->partial_symtabs
!= nullptr)
6223 /* Partial symbols were already read, so now we can simply
6225 objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6226 per_objfile
->resize_symtabs ();
6232 /* This isn't really ideal: all the data we allocate on the
6233 objfile's obstack is still uselessly kept around. However,
6234 freeing it seems unsafe. */
6235 psymtab_discarder
psymtabs (objfile
);
6236 dwarf2_build_psymtabs_hard (per_objfile
);
6239 per_objfile
->resize_symtabs ();
6241 /* (maybe) store an index in the cache. */
6242 global_index_cache
.store (per_objfile
);
6244 catch (const gdb_exception_error
&except
)
6246 exception_print (gdb_stderr
, except
);
6249 /* Finish by setting the local reference to partial symtabs, so that
6250 we don't try to read them again if reading another objfile with the same
6251 BFD. If we can't in fact share, this won't make a difference anyway as
6252 the dwarf2_per_bfd object won't be shared. */
6253 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
6256 /* Find the base address of the compilation unit for range lists and
6257 location lists. It will normally be specified by DW_AT_low_pc.
6258 In DWARF-3 draft 4, the base address could be overridden by
6259 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6260 compilation units with discontinuous ranges. */
6263 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6265 struct attribute
*attr
;
6267 cu
->base_address
.reset ();
6269 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6270 if (attr
!= nullptr)
6271 cu
->base_address
= attr
->as_address ();
6274 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6275 if (attr
!= nullptr)
6276 cu
->base_address
= attr
->as_address ();
6280 /* Helper function that returns the proper abbrev section for
6283 static struct dwarf2_section_info
*
6284 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6286 struct dwarf2_section_info
*abbrev
;
6287 dwarf2_per_bfd
*per_bfd
= this_cu
->per_bfd
;
6289 if (this_cu
->is_dwz
)
6290 abbrev
= &dwarf2_get_dwz_file (per_bfd
)->abbrev
;
6292 abbrev
= &per_bfd
->abbrev
;
6297 /* Fetch the abbreviation table offset from a comp or type unit header. */
6300 read_abbrev_offset (dwarf2_per_objfile
*per_objfile
,
6301 struct dwarf2_section_info
*section
,
6302 sect_offset sect_off
)
6304 bfd
*abfd
= section
->get_bfd_owner ();
6305 const gdb_byte
*info_ptr
;
6306 unsigned int initial_length_size
, offset_size
;
6309 section
->read (per_objfile
->objfile
);
6310 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6311 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6312 offset_size
= initial_length_size
== 4 ? 4 : 8;
6313 info_ptr
+= initial_length_size
;
6315 version
= read_2_bytes (abfd
, info_ptr
);
6319 /* Skip unit type and address size. */
6323 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6326 /* A partial symtab that is used only for include files. */
6327 struct dwarf2_include_psymtab
: public partial_symtab
6329 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6330 : partial_symtab (filename
, objfile
)
6334 void read_symtab (struct objfile
*objfile
) override
6336 /* It's an include file, no symbols to read for it.
6337 Everything is in the includer symtab. */
6339 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6340 expansion of the includer psymtab. We use the dependencies[0] field to
6341 model the includer. But if we go the regular route of calling
6342 expand_psymtab here, and having expand_psymtab call expand_dependencies
6343 to expand the includer, we'll only use expand_psymtab on the includer
6344 (making it a non-toplevel psymtab), while if we expand the includer via
6345 another path, we'll use read_symtab (making it a toplevel psymtab).
6346 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6347 psymtab, and trigger read_symtab on the includer here directly. */
6348 includer ()->read_symtab (objfile
);
6351 void expand_psymtab (struct objfile
*objfile
) override
6353 /* This is not called by read_symtab, and should not be called by any
6354 expand_dependencies. */
6358 bool readin_p (struct objfile
*objfile
) const override
6360 return includer ()->readin_p (objfile
);
6363 compunit_symtab
*get_compunit_symtab (struct objfile
*objfile
) const override
6369 partial_symtab
*includer () const
6371 /* An include psymtab has exactly one dependency: the psymtab that
6373 gdb_assert (this->number_of_dependencies
== 1);
6374 return this->dependencies
[0];
6378 /* Allocate a new partial symtab for file named NAME and mark this new
6379 partial symtab as being an include of PST. */
6382 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6383 struct objfile
*objfile
)
6385 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6387 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6388 subpst
->dirname
= pst
->dirname
;
6390 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6391 subpst
->dependencies
[0] = pst
;
6392 subpst
->number_of_dependencies
= 1;
6395 /* Read the Line Number Program data and extract the list of files
6396 included by the source file represented by PST. Build an include
6397 partial symtab for each of these included files. */
6400 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6401 struct die_info
*die
,
6402 dwarf2_psymtab
*pst
)
6405 struct attribute
*attr
;
6407 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6408 if (attr
!= nullptr && attr
->form_is_unsigned ())
6409 lh
= dwarf_decode_line_header ((sect_offset
) attr
->as_unsigned (), cu
);
6411 return; /* No linetable, so no includes. */
6413 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6414 that we pass in the raw text_low here; that is ok because we're
6415 only decoding the line table to make include partial symtabs, and
6416 so the addresses aren't really used. */
6417 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6418 pst
->raw_text_low (), 1);
6422 hash_signatured_type (const void *item
)
6424 const struct signatured_type
*sig_type
6425 = (const struct signatured_type
*) item
;
6427 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6428 return sig_type
->signature
;
6432 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6434 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6435 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6437 return lhs
->signature
== rhs
->signature
;
6440 /* Allocate a hash table for signatured types. */
6443 allocate_signatured_type_table ()
6445 return htab_up (htab_create_alloc (41,
6446 hash_signatured_type
,
6448 NULL
, xcalloc
, xfree
));
6451 /* A helper function to add a signatured type CU to a table. */
6454 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6456 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6457 std::vector
<signatured_type
*> *all_type_units
6458 = (std::vector
<signatured_type
*> *) datum
;
6460 all_type_units
->push_back (sigt
);
6465 /* A helper for create_debug_types_hash_table. Read types from SECTION
6466 and fill them into TYPES_HTAB. It will process only type units,
6467 therefore DW_UT_type. */
6470 create_debug_type_hash_table (dwarf2_per_objfile
*per_objfile
,
6471 struct dwo_file
*dwo_file
,
6472 dwarf2_section_info
*section
, htab_up
&types_htab
,
6473 rcuh_kind section_kind
)
6475 struct objfile
*objfile
= per_objfile
->objfile
;
6476 struct dwarf2_section_info
*abbrev_section
;
6478 const gdb_byte
*info_ptr
, *end_ptr
;
6480 abbrev_section
= (dwo_file
!= NULL
6481 ? &dwo_file
->sections
.abbrev
6482 : &per_objfile
->per_bfd
->abbrev
);
6484 dwarf_read_debug_printf ("Reading %s for %s:",
6485 section
->get_name (),
6486 abbrev_section
->get_file_name ());
6488 section
->read (objfile
);
6489 info_ptr
= section
->buffer
;
6491 if (info_ptr
== NULL
)
6494 /* We can't set abfd until now because the section may be empty or
6495 not present, in which case the bfd is unknown. */
6496 abfd
= section
->get_bfd_owner ();
6498 /* We don't use cutu_reader here because we don't need to read
6499 any dies: the signature is in the header. */
6501 end_ptr
= info_ptr
+ section
->size
;
6502 while (info_ptr
< end_ptr
)
6504 struct signatured_type
*sig_type
;
6505 struct dwo_unit
*dwo_tu
;
6507 const gdb_byte
*ptr
= info_ptr
;
6508 struct comp_unit_head header
;
6509 unsigned int length
;
6511 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6513 /* Initialize it due to a false compiler warning. */
6514 header
.signature
= -1;
6515 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6517 /* We need to read the type's signature in order to build the hash
6518 table, but we don't need anything else just yet. */
6520 ptr
= read_and_check_comp_unit_head (per_objfile
, &header
, section
,
6521 abbrev_section
, ptr
, section_kind
);
6523 length
= header
.get_length ();
6525 /* Skip dummy type units. */
6526 if (ptr
>= info_ptr
+ length
6527 || peek_abbrev_code (abfd
, ptr
) == 0
6528 || (header
.unit_type
!= DW_UT_type
6529 && header
.unit_type
!= DW_UT_split_type
))
6535 if (types_htab
== NULL
)
6538 types_htab
= allocate_dwo_unit_table ();
6540 types_htab
= allocate_signatured_type_table ();
6546 dwo_tu
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, dwo_unit
);
6547 dwo_tu
->dwo_file
= dwo_file
;
6548 dwo_tu
->signature
= header
.signature
;
6549 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6550 dwo_tu
->section
= section
;
6551 dwo_tu
->sect_off
= sect_off
;
6552 dwo_tu
->length
= length
;
6556 /* N.B.: type_offset is not usable if this type uses a DWO file.
6557 The real type_offset is in the DWO file. */
6559 sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
6560 sig_type
->signature
= header
.signature
;
6561 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6562 sig_type
->per_cu
.is_debug_types
= 1;
6563 sig_type
->per_cu
.section
= section
;
6564 sig_type
->per_cu
.sect_off
= sect_off
;
6565 sig_type
->per_cu
.length
= length
;
6568 slot
= htab_find_slot (types_htab
.get (),
6569 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6571 gdb_assert (slot
!= NULL
);
6574 sect_offset dup_sect_off
;
6578 const struct dwo_unit
*dup_tu
6579 = (const struct dwo_unit
*) *slot
;
6581 dup_sect_off
= dup_tu
->sect_off
;
6585 const struct signatured_type
*dup_tu
6586 = (const struct signatured_type
*) *slot
;
6588 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6591 complaint (_("debug type entry at offset %s is duplicate to"
6592 " the entry at offset %s, signature %s"),
6593 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6594 hex_string (header
.signature
));
6596 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6598 dwarf_read_debug_printf_v (" offset %s, signature %s",
6599 sect_offset_str (sect_off
),
6600 hex_string (header
.signature
));
6606 /* Create the hash table of all entries in the .debug_types
6607 (or .debug_types.dwo) section(s).
6608 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6609 otherwise it is NULL.
6611 The result is a pointer to the hash table or NULL if there are no types.
6613 Note: This function processes DWO files only, not DWP files. */
6616 create_debug_types_hash_table (dwarf2_per_objfile
*per_objfile
,
6617 struct dwo_file
*dwo_file
,
6618 gdb::array_view
<dwarf2_section_info
> type_sections
,
6619 htab_up
&types_htab
)
6621 for (dwarf2_section_info
§ion
: type_sections
)
6622 create_debug_type_hash_table (per_objfile
, dwo_file
, §ion
, types_htab
,
6626 /* Create the hash table of all entries in the .debug_types section,
6627 and initialize all_type_units.
6628 The result is zero if there is an error (e.g. missing .debug_types section),
6629 otherwise non-zero. */
6632 create_all_type_units (dwarf2_per_objfile
*per_objfile
)
6636 create_debug_type_hash_table (per_objfile
, NULL
, &per_objfile
->per_bfd
->info
,
6637 types_htab
, rcuh_kind::COMPILE
);
6638 create_debug_types_hash_table (per_objfile
, NULL
, per_objfile
->per_bfd
->types
,
6640 if (types_htab
== NULL
)
6642 per_objfile
->per_bfd
->signatured_types
= NULL
;
6646 per_objfile
->per_bfd
->signatured_types
= std::move (types_htab
);
6648 gdb_assert (per_objfile
->per_bfd
->all_type_units
.empty ());
6649 per_objfile
->per_bfd
->all_type_units
.reserve
6650 (htab_elements (per_objfile
->per_bfd
->signatured_types
.get ()));
6652 htab_traverse_noresize (per_objfile
->per_bfd
->signatured_types
.get (),
6653 add_signatured_type_cu_to_table
,
6654 &per_objfile
->per_bfd
->all_type_units
);
6659 /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types.
6660 If SLOT is non-NULL, it is the entry to use in the hash table.
6661 Otherwise we find one. */
6663 static struct signatured_type
*
6664 add_type_unit (dwarf2_per_objfile
*per_objfile
, ULONGEST sig
, void **slot
)
6666 if (per_objfile
->per_bfd
->all_type_units
.size ()
6667 == per_objfile
->per_bfd
->all_type_units
.capacity ())
6668 ++per_objfile
->per_bfd
->tu_stats
.nr_all_type_units_reallocs
;
6670 signatured_type
*sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
6672 per_objfile
->resize_symtabs ();
6674 per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
6675 sig_type
->signature
= sig
;
6676 sig_type
->per_cu
.is_debug_types
= 1;
6677 if (per_objfile
->per_bfd
->using_index
)
6679 sig_type
->per_cu
.v
.quick
=
6680 OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
,
6681 struct dwarf2_per_cu_quick_data
);
6686 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6689 gdb_assert (*slot
== NULL
);
6691 /* The rest of sig_type must be filled in by the caller. */
6695 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6696 Fill in SIG_ENTRY with DWO_ENTRY. */
6699 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
*per_objfile
,
6700 struct signatured_type
*sig_entry
,
6701 struct dwo_unit
*dwo_entry
)
6703 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6705 /* Make sure we're not clobbering something we don't expect to. */
6706 gdb_assert (! sig_entry
->per_cu
.queued
);
6707 gdb_assert (per_objfile
->get_cu (&sig_entry
->per_cu
) == NULL
);
6708 if (per_bfd
->using_index
)
6710 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6711 gdb_assert (!per_objfile
->symtab_set_p (&sig_entry
->per_cu
));
6714 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6715 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6716 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6717 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6718 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6720 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6721 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6722 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6723 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6724 sig_entry
->per_cu
.per_bfd
= per_bfd
;
6725 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6726 sig_entry
->dwo_unit
= dwo_entry
;
6729 /* Subroutine of lookup_signatured_type.
6730 If we haven't read the TU yet, create the signatured_type data structure
6731 for a TU to be read in directly from a DWO file, bypassing the stub.
6732 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6733 using .gdb_index, then when reading a CU we want to stay in the DWO file
6734 containing that CU. Otherwise we could end up reading several other DWO
6735 files (due to comdat folding) to process the transitive closure of all the
6736 mentioned TUs, and that can be slow. The current DWO file will have every
6737 type signature that it needs.
6738 We only do this for .gdb_index because in the psymtab case we already have
6739 to read all the DWOs to build the type unit groups. */
6741 static struct signatured_type
*
6742 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6744 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6745 struct dwo_file
*dwo_file
;
6746 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6747 struct signatured_type find_sig_entry
, *sig_entry
;
6750 gdb_assert (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
);
6752 /* If TU skeletons have been removed then we may not have read in any
6754 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6755 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6757 /* We only ever need to read in one copy of a signatured type.
6758 Use the global signatured_types array to do our own comdat-folding
6759 of types. If this is the first time we're reading this TU, and
6760 the TU has an entry in .gdb_index, replace the recorded data from
6761 .gdb_index with this TU. */
6763 find_sig_entry
.signature
= sig
;
6764 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6765 &find_sig_entry
, INSERT
);
6766 sig_entry
= (struct signatured_type
*) *slot
;
6768 /* We can get here with the TU already read, *or* in the process of being
6769 read. Don't reassign the global entry to point to this DWO if that's
6770 the case. Also note that if the TU is already being read, it may not
6771 have come from a DWO, the program may be a mix of Fission-compiled
6772 code and non-Fission-compiled code. */
6774 /* Have we already tried to read this TU?
6775 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6776 needn't exist in the global table yet). */
6777 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6780 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6781 dwo_unit of the TU itself. */
6782 dwo_file
= cu
->dwo_unit
->dwo_file
;
6784 /* Ok, this is the first time we're reading this TU. */
6785 if (dwo_file
->tus
== NULL
)
6787 find_dwo_entry
.signature
= sig
;
6788 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6790 if (dwo_entry
== NULL
)
6793 /* If the global table doesn't have an entry for this TU, add one. */
6794 if (sig_entry
== NULL
)
6795 sig_entry
= add_type_unit (per_objfile
, sig
, slot
);
6797 fill_in_sig_entry_from_dwo_entry (per_objfile
, sig_entry
, dwo_entry
);
6798 sig_entry
->per_cu
.tu_read
= 1;
6802 /* Subroutine of lookup_signatured_type.
6803 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6804 then try the DWP file. If the TU stub (skeleton) has been removed then
6805 it won't be in .gdb_index. */
6807 static struct signatured_type
*
6808 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6810 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6811 struct dwp_file
*dwp_file
= get_dwp_file (per_objfile
);
6812 struct dwo_unit
*dwo_entry
;
6813 struct signatured_type find_sig_entry
, *sig_entry
;
6816 gdb_assert (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
);
6817 gdb_assert (dwp_file
!= NULL
);
6819 /* If TU skeletons have been removed then we may not have read in any
6821 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6822 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6824 find_sig_entry
.signature
= sig
;
6825 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6826 &find_sig_entry
, INSERT
);
6827 sig_entry
= (struct signatured_type
*) *slot
;
6829 /* Have we already tried to read this TU?
6830 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6831 needn't exist in the global table yet). */
6832 if (sig_entry
!= NULL
)
6835 if (dwp_file
->tus
== NULL
)
6837 dwo_entry
= lookup_dwo_unit_in_dwp (per_objfile
, dwp_file
, NULL
, sig
,
6838 1 /* is_debug_types */);
6839 if (dwo_entry
== NULL
)
6842 sig_entry
= add_type_unit (per_objfile
, sig
, slot
);
6843 fill_in_sig_entry_from_dwo_entry (per_objfile
, sig_entry
, dwo_entry
);
6848 /* Lookup a signature based type for DW_FORM_ref_sig8.
6849 Returns NULL if signature SIG is not present in the table.
6850 It is up to the caller to complain about this. */
6852 static struct signatured_type
*
6853 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6855 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6857 if (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
)
6859 /* We're in a DWO/DWP file, and we're using .gdb_index.
6860 These cases require special processing. */
6861 if (get_dwp_file (per_objfile
) == NULL
)
6862 return lookup_dwo_signatured_type (cu
, sig
);
6864 return lookup_dwp_signatured_type (cu
, sig
);
6868 struct signatured_type find_entry
, *entry
;
6870 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6872 find_entry
.signature
= sig
;
6873 entry
= ((struct signatured_type
*)
6874 htab_find (per_objfile
->per_bfd
->signatured_types
.get (),
6880 /* Low level DIE reading support. */
6882 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6885 init_cu_die_reader (struct die_reader_specs
*reader
,
6886 struct dwarf2_cu
*cu
,
6887 struct dwarf2_section_info
*section
,
6888 struct dwo_file
*dwo_file
,
6889 struct abbrev_table
*abbrev_table
)
6891 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6892 reader
->abfd
= section
->get_bfd_owner ();
6894 reader
->dwo_file
= dwo_file
;
6895 reader
->die_section
= section
;
6896 reader
->buffer
= section
->buffer
;
6897 reader
->buffer_end
= section
->buffer
+ section
->size
;
6898 reader
->abbrev_table
= abbrev_table
;
6901 /* Subroutine of cutu_reader to simplify it.
6902 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6903 There's just a lot of work to do, and cutu_reader is big enough
6906 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6907 from it to the DIE in the DWO. If NULL we are skipping the stub.
6908 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6909 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6910 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6911 STUB_COMP_DIR may be non-NULL.
6912 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6913 are filled in with the info of the DIE from the DWO file.
6914 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6915 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6916 kept around for at least as long as *RESULT_READER.
6918 The result is non-zero if a valid (non-dummy) DIE was found. */
6921 read_cutu_die_from_dwo (dwarf2_cu
*cu
,
6922 struct dwo_unit
*dwo_unit
,
6923 struct die_info
*stub_comp_unit_die
,
6924 const char *stub_comp_dir
,
6925 struct die_reader_specs
*result_reader
,
6926 const gdb_byte
**result_info_ptr
,
6927 struct die_info
**result_comp_unit_die
,
6928 abbrev_table_up
*result_dwo_abbrev_table
)
6930 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6931 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6932 struct objfile
*objfile
= per_objfile
->objfile
;
6934 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6935 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6936 int i
,num_extra_attrs
;
6937 struct dwarf2_section_info
*dwo_abbrev_section
;
6938 struct die_info
*comp_unit_die
;
6940 /* At most one of these may be provided. */
6941 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6943 /* These attributes aren't processed until later:
6944 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6945 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6946 referenced later. However, these attributes are found in the stub
6947 which we won't have later. In order to not impose this complication
6948 on the rest of the code, we read them here and copy them to the
6957 if (stub_comp_unit_die
!= NULL
)
6959 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6961 if (!per_cu
->is_debug_types
)
6962 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6963 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6964 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6965 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6966 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6968 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6970 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6971 here (if needed). We need the value before we can process
6973 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6975 else if (stub_comp_dir
!= NULL
)
6977 /* Reconstruct the comp_dir attribute to simplify the code below. */
6978 comp_dir
= OBSTACK_ZALLOC (&cu
->comp_unit_obstack
, struct attribute
);
6979 comp_dir
->name
= DW_AT_comp_dir
;
6980 comp_dir
->form
= DW_FORM_string
;
6981 comp_dir
->set_string_noncanonical (stub_comp_dir
);
6984 /* Set up for reading the DWO CU/TU. */
6985 cu
->dwo_unit
= dwo_unit
;
6986 dwarf2_section_info
*section
= dwo_unit
->section
;
6987 section
->read (objfile
);
6988 abfd
= section
->get_bfd_owner ();
6989 begin_info_ptr
= info_ptr
= (section
->buffer
6990 + to_underlying (dwo_unit
->sect_off
));
6991 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6993 if (per_cu
->is_debug_types
)
6995 signatured_type
*sig_type
= (struct signatured_type
*) per_cu
;
6997 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
6998 section
, dwo_abbrev_section
,
6999 info_ptr
, rcuh_kind::TYPE
);
7000 /* This is not an assert because it can be caused by bad debug info. */
7001 if (sig_type
->signature
!= cu
->header
.signature
)
7003 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7004 " TU at offset %s [in module %s]"),
7005 hex_string (sig_type
->signature
),
7006 hex_string (cu
->header
.signature
),
7007 sect_offset_str (dwo_unit
->sect_off
),
7008 bfd_get_filename (abfd
));
7010 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7011 /* For DWOs coming from DWP files, we don't know the CU length
7012 nor the type's offset in the TU until now. */
7013 dwo_unit
->length
= cu
->header
.get_length ();
7014 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7016 /* Establish the type offset that can be used to lookup the type.
7017 For DWO files, we don't know it until now. */
7018 sig_type
->type_offset_in_section
7019 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7023 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7024 section
, dwo_abbrev_section
,
7025 info_ptr
, rcuh_kind::COMPILE
);
7026 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7027 /* For DWOs coming from DWP files, we don't know the CU length
7029 dwo_unit
->length
= cu
->header
.get_length ();
7032 dwo_abbrev_section
->read (objfile
);
7033 *result_dwo_abbrev_table
7034 = abbrev_table::read (dwo_abbrev_section
, cu
->header
.abbrev_sect_off
);
7035 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7036 result_dwo_abbrev_table
->get ());
7038 /* Read in the die, but leave space to copy over the attributes
7039 from the stub. This has the benefit of simplifying the rest of
7040 the code - all the work to maintain the illusion of a single
7041 DW_TAG_{compile,type}_unit DIE is done here. */
7042 num_extra_attrs
= ((stmt_list
!= NULL
)
7046 + (comp_dir
!= NULL
));
7047 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7050 /* Copy over the attributes from the stub to the DIE we just read in. */
7051 comp_unit_die
= *result_comp_unit_die
;
7052 i
= comp_unit_die
->num_attrs
;
7053 if (stmt_list
!= NULL
)
7054 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7056 comp_unit_die
->attrs
[i
++] = *low_pc
;
7057 if (high_pc
!= NULL
)
7058 comp_unit_die
->attrs
[i
++] = *high_pc
;
7060 comp_unit_die
->attrs
[i
++] = *ranges
;
7061 if (comp_dir
!= NULL
)
7062 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7063 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7065 if (dwarf_die_debug
)
7067 fprintf_unfiltered (gdb_stdlog
,
7068 "Read die from %s@0x%x of %s:\n",
7069 section
->get_name (),
7070 (unsigned) (begin_info_ptr
- section
->buffer
),
7071 bfd_get_filename (abfd
));
7072 dump_die (comp_unit_die
, dwarf_die_debug
);
7075 /* Skip dummy compilation units. */
7076 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7077 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7080 *result_info_ptr
= info_ptr
;
7084 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
7085 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
7086 signature is part of the header. */
7087 static gdb::optional
<ULONGEST
>
7088 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
7090 if (cu
->header
.version
>= 5)
7091 return cu
->header
.signature
;
7092 struct attribute
*attr
;
7093 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7094 if (attr
== nullptr || !attr
->form_is_unsigned ())
7095 return gdb::optional
<ULONGEST
> ();
7096 return attr
->as_unsigned ();
7099 /* Subroutine of cutu_reader to simplify it.
7100 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7101 Returns NULL if the specified DWO unit cannot be found. */
7103 static struct dwo_unit
*
7104 lookup_dwo_unit (dwarf2_cu
*cu
, die_info
*comp_unit_die
, const char *dwo_name
)
7106 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7107 struct dwo_unit
*dwo_unit
;
7108 const char *comp_dir
;
7110 gdb_assert (cu
!= NULL
);
7112 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7113 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7114 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7116 if (per_cu
->is_debug_types
)
7117 dwo_unit
= lookup_dwo_type_unit (cu
, dwo_name
, comp_dir
);
7120 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7122 if (!signature
.has_value ())
7123 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7125 dwo_name
, bfd_get_filename (per_cu
->per_bfd
->obfd
));
7127 dwo_unit
= lookup_dwo_comp_unit (cu
, dwo_name
, comp_dir
, *signature
);
7133 /* Subroutine of cutu_reader to simplify it.
7134 See it for a description of the parameters.
7135 Read a TU directly from a DWO file, bypassing the stub. */
7138 cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
7139 dwarf2_per_objfile
*per_objfile
,
7140 dwarf2_cu
*existing_cu
)
7142 struct signatured_type
*sig_type
;
7144 /* Verify we can do the following downcast, and that we have the
7146 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7147 sig_type
= (struct signatured_type
*) this_cu
;
7148 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7152 if (existing_cu
!= nullptr)
7155 gdb_assert (cu
->dwo_unit
== sig_type
->dwo_unit
);
7156 /* There's no need to do the rereading_dwo_cu handling that
7157 cutu_reader does since we don't read the stub. */
7161 /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu
7162 in per_objfile yet. */
7163 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7164 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7165 cu
= m_new_cu
.get ();
7168 /* A future optimization, if needed, would be to use an existing
7169 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7170 could share abbrev tables. */
7172 if (read_cutu_die_from_dwo (cu
, sig_type
->dwo_unit
,
7173 NULL
/* stub_comp_unit_die */,
7174 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7177 &m_dwo_abbrev_table
) == 0)
7184 /* Initialize a CU (or TU) and read its DIEs.
7185 If the CU defers to a DWO file, read the DWO file as well.
7187 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7188 Otherwise the table specified in the comp unit header is read in and used.
7189 This is an optimization for when we already have the abbrev table.
7191 If EXISTING_CU is non-NULL, then use it. Otherwise, a new CU is
7194 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7195 dwarf2_per_objfile
*per_objfile
,
7196 struct abbrev_table
*abbrev_table
,
7197 dwarf2_cu
*existing_cu
,
7199 : die_reader_specs
{},
7202 struct objfile
*objfile
= per_objfile
->objfile
;
7203 struct dwarf2_section_info
*section
= this_cu
->section
;
7204 bfd
*abfd
= section
->get_bfd_owner ();
7205 const gdb_byte
*begin_info_ptr
;
7206 struct signatured_type
*sig_type
= NULL
;
7207 struct dwarf2_section_info
*abbrev_section
;
7208 /* Non-zero if CU currently points to a DWO file and we need to
7209 reread it. When this happens we need to reread the skeleton die
7210 before we can reread the DWO file (this only applies to CUs, not TUs). */
7211 int rereading_dwo_cu
= 0;
7213 if (dwarf_die_debug
)
7214 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7215 this_cu
->is_debug_types
? "type" : "comp",
7216 sect_offset_str (this_cu
->sect_off
));
7218 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7219 file (instead of going through the stub), short-circuit all of this. */
7220 if (this_cu
->reading_dwo_directly
)
7222 /* Narrow down the scope of possibilities to have to understand. */
7223 gdb_assert (this_cu
->is_debug_types
);
7224 gdb_assert (abbrev_table
== NULL
);
7225 init_tu_and_read_dwo_dies (this_cu
, per_objfile
, existing_cu
);
7229 /* This is cheap if the section is already read in. */
7230 section
->read (objfile
);
7232 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7234 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7238 if (existing_cu
!= nullptr)
7241 /* If this CU is from a DWO file we need to start over, we need to
7242 refetch the attributes from the skeleton CU.
7243 This could be optimized by retrieving those attributes from when we
7244 were here the first time: the previous comp_unit_die was stored in
7245 comp_unit_obstack. But there's no data yet that we need this
7247 if (cu
->dwo_unit
!= NULL
)
7248 rereading_dwo_cu
= 1;
7252 /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu
7253 in per_objfile yet. */
7254 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7255 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7256 cu
= m_new_cu
.get ();
7259 /* Get the header. */
7260 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7262 /* We already have the header, there's no need to read it in again. */
7263 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7267 if (this_cu
->is_debug_types
)
7269 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7270 section
, abbrev_section
,
7271 info_ptr
, rcuh_kind::TYPE
);
7273 /* Since per_cu is the first member of struct signatured_type,
7274 we can go from a pointer to one to a pointer to the other. */
7275 sig_type
= (struct signatured_type
*) this_cu
;
7276 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7277 gdb_assert (sig_type
->type_offset_in_tu
7278 == cu
->header
.type_cu_offset_in_tu
);
7279 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7281 /* LENGTH has not been set yet for type units if we're
7282 using .gdb_index. */
7283 this_cu
->length
= cu
->header
.get_length ();
7285 /* Establish the type offset that can be used to lookup the type. */
7286 sig_type
->type_offset_in_section
=
7287 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7289 this_cu
->dwarf_version
= cu
->header
.version
;
7293 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7294 section
, abbrev_section
,
7296 rcuh_kind::COMPILE
);
7298 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7299 if (this_cu
->length
== 0)
7300 this_cu
->length
= cu
->header
.get_length ();
7302 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7303 this_cu
->dwarf_version
= cu
->header
.version
;
7307 /* Skip dummy compilation units. */
7308 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7309 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7315 /* If we don't have them yet, read the abbrevs for this compilation unit.
7316 And if we need to read them now, make sure they're freed when we're
7318 if (abbrev_table
!= NULL
)
7319 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7322 abbrev_section
->read (objfile
);
7323 m_abbrev_table_holder
7324 = abbrev_table::read (abbrev_section
, cu
->header
.abbrev_sect_off
);
7325 abbrev_table
= m_abbrev_table_holder
.get ();
7328 /* Read the top level CU/TU die. */
7329 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7330 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7332 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7338 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7339 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7340 table from the DWO file and pass the ownership over to us. It will be
7341 referenced from READER, so we must make sure to free it after we're done
7344 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7345 DWO CU, that this test will fail (the attribute will not be present). */
7346 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7347 if (dwo_name
!= nullptr)
7349 struct dwo_unit
*dwo_unit
;
7350 struct die_info
*dwo_comp_unit_die
;
7352 if (comp_unit_die
->has_children
)
7354 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7355 " has children (offset %s) [in module %s]"),
7356 sect_offset_str (this_cu
->sect_off
),
7357 bfd_get_filename (abfd
));
7359 dwo_unit
= lookup_dwo_unit (cu
, comp_unit_die
, dwo_name
);
7360 if (dwo_unit
!= NULL
)
7362 if (read_cutu_die_from_dwo (cu
, dwo_unit
,
7363 comp_unit_die
, NULL
,
7366 &m_dwo_abbrev_table
) == 0)
7372 comp_unit_die
= dwo_comp_unit_die
;
7376 /* Yikes, we couldn't find the rest of the DIE, we only have
7377 the stub. A complaint has already been logged. There's
7378 not much more we can do except pass on the stub DIE to
7379 die_reader_func. We don't want to throw an error on bad
7386 cutu_reader::keep ()
7388 /* Done, clean up. */
7389 gdb_assert (!dummy_p
);
7390 if (m_new_cu
!= NULL
)
7392 /* Save this dwarf2_cu in the per_objfile. The per_objfile owns it
7394 dwarf2_per_objfile
*per_objfile
= m_new_cu
->per_objfile
;
7395 per_objfile
->set_cu (m_this_cu
, m_new_cu
.release ());
7399 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7400 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7401 assumed to have already done the lookup to find the DWO file).
7403 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7404 THIS_CU->is_debug_types, but nothing else.
7406 We fill in THIS_CU->length.
7408 THIS_CU->cu is always freed when done.
7409 This is done in order to not leave THIS_CU->cu in a state where we have
7410 to care whether it refers to the "main" CU or the DWO CU.
7412 When parent_cu is passed, it is used to provide a default value for
7413 str_offsets_base and addr_base from the parent. */
7415 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7416 dwarf2_per_objfile
*per_objfile
,
7417 struct dwarf2_cu
*parent_cu
,
7418 struct dwo_file
*dwo_file
)
7419 : die_reader_specs
{},
7422 struct objfile
*objfile
= per_objfile
->objfile
;
7423 struct dwarf2_section_info
*section
= this_cu
->section
;
7424 bfd
*abfd
= section
->get_bfd_owner ();
7425 struct dwarf2_section_info
*abbrev_section
;
7426 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7428 if (dwarf_die_debug
)
7429 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7430 this_cu
->is_debug_types
? "type" : "comp",
7431 sect_offset_str (this_cu
->sect_off
));
7433 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7435 abbrev_section
= (dwo_file
!= NULL
7436 ? &dwo_file
->sections
.abbrev
7437 : get_abbrev_section_for_cu (this_cu
));
7439 /* This is cheap if the section is already read in. */
7440 section
->read (objfile
);
7442 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7444 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7445 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &m_new_cu
->header
,
7446 section
, abbrev_section
, info_ptr
,
7447 (this_cu
->is_debug_types
7449 : rcuh_kind::COMPILE
));
7451 if (parent_cu
!= nullptr)
7453 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7454 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7456 this_cu
->length
= m_new_cu
->header
.get_length ();
7458 /* Skip dummy compilation units. */
7459 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7460 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7466 abbrev_section
->read (objfile
);
7467 m_abbrev_table_holder
7468 = abbrev_table::read (abbrev_section
, m_new_cu
->header
.abbrev_sect_off
);
7470 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7471 m_abbrev_table_holder
.get ());
7472 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7476 /* Type Unit Groups.
7478 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7479 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7480 so that all types coming from the same compilation (.o file) are grouped
7481 together. A future step could be to put the types in the same symtab as
7482 the CU the types ultimately came from. */
7485 hash_type_unit_group (const void *item
)
7487 const struct type_unit_group
*tu_group
7488 = (const struct type_unit_group
*) item
;
7490 return hash_stmt_list_entry (&tu_group
->hash
);
7494 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7496 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7497 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7499 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7502 /* Allocate a hash table for type unit groups. */
7505 allocate_type_unit_groups_table ()
7507 return htab_up (htab_create_alloc (3,
7508 hash_type_unit_group
,
7510 NULL
, xcalloc
, xfree
));
7513 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7514 partial symtabs. We combine several TUs per psymtab to not let the size
7515 of any one psymtab grow too big. */
7516 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7517 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7519 /* Helper routine for get_type_unit_group.
7520 Create the type_unit_group object used to hold one or more TUs. */
7522 static struct type_unit_group
*
7523 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7525 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7526 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
7527 struct dwarf2_per_cu_data
*per_cu
;
7528 struct type_unit_group
*tu_group
;
7530 tu_group
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, type_unit_group
);
7531 per_cu
= &tu_group
->per_cu
;
7532 per_cu
->per_bfd
= per_bfd
;
7534 if (per_bfd
->using_index
)
7536 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
7537 struct dwarf2_per_cu_quick_data
);
7541 unsigned int line_offset
= to_underlying (line_offset_struct
);
7542 dwarf2_psymtab
*pst
;
7545 /* Give the symtab a useful name for debug purposes. */
7546 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7547 name
= string_printf ("<type_units_%d>",
7548 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7550 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7552 pst
= create_partial_symtab (per_cu
, per_objfile
, name
.c_str ());
7553 pst
->anonymous
= true;
7556 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7557 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7562 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7563 STMT_LIST is a DW_AT_stmt_list attribute. */
7565 static struct type_unit_group
*
7566 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7568 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7569 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7570 struct type_unit_group
*tu_group
;
7572 unsigned int line_offset
;
7573 struct type_unit_group type_unit_group_for_lookup
;
7575 if (per_objfile
->per_bfd
->type_unit_groups
== NULL
)
7576 per_objfile
->per_bfd
->type_unit_groups
= allocate_type_unit_groups_table ();
7578 /* Do we need to create a new group, or can we use an existing one? */
7580 if (stmt_list
!= nullptr && stmt_list
->form_is_unsigned ())
7582 line_offset
= stmt_list
->as_unsigned ();
7583 ++tu_stats
->nr_symtab_sharers
;
7587 /* Ugh, no stmt_list. Rare, but we have to handle it.
7588 We can do various things here like create one group per TU or
7589 spread them over multiple groups to split up the expansion work.
7590 To avoid worst case scenarios (too many groups or too large groups)
7591 we, umm, group them in bunches. */
7592 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7593 | (tu_stats
->nr_stmt_less_type_units
7594 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7595 ++tu_stats
->nr_stmt_less_type_units
;
7598 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7599 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7600 slot
= htab_find_slot (per_objfile
->per_bfd
->type_unit_groups
.get (),
7601 &type_unit_group_for_lookup
, INSERT
);
7604 tu_group
= (struct type_unit_group
*) *slot
;
7605 gdb_assert (tu_group
!= NULL
);
7609 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7610 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7612 ++tu_stats
->nr_symtabs
;
7618 /* Partial symbol tables. */
7620 /* Create a psymtab named NAME and assign it to PER_CU.
7622 The caller must fill in the following details:
7623 dirname, textlow, texthigh. */
7625 static dwarf2_psymtab
*
7626 create_partial_symtab (dwarf2_per_cu_data
*per_cu
,
7627 dwarf2_per_objfile
*per_objfile
,
7630 struct objfile
*objfile
= per_objfile
->objfile
;
7631 dwarf2_psymtab
*pst
;
7633 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7635 pst
->psymtabs_addrmap_supported
= true;
7637 /* This is the glue that links PST into GDB's symbol API. */
7638 per_cu
->v
.psymtab
= pst
;
7643 /* DIE reader function for process_psymtab_comp_unit. */
7646 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7647 const gdb_byte
*info_ptr
,
7648 struct die_info
*comp_unit_die
,
7649 enum language pretend_language
)
7651 struct dwarf2_cu
*cu
= reader
->cu
;
7652 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7653 struct objfile
*objfile
= per_objfile
->objfile
;
7654 struct gdbarch
*gdbarch
= objfile
->arch ();
7655 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7657 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7658 dwarf2_psymtab
*pst
;
7659 enum pc_bounds_kind cu_bounds_kind
;
7660 const char *filename
;
7662 gdb_assert (! per_cu
->is_debug_types
);
7664 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7666 /* Allocate a new partial symbol table structure. */
7667 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7668 static const char artificial
[] = "<artificial>";
7669 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7670 if (filename
== NULL
)
7672 else if (strcmp (filename
, artificial
) == 0)
7674 debug_filename
.reset (concat (artificial
, "@",
7675 sect_offset_str (per_cu
->sect_off
),
7677 filename
= debug_filename
.get ();
7680 pst
= create_partial_symtab (per_cu
, per_objfile
, filename
);
7682 /* This must be done before calling dwarf2_build_include_psymtabs. */
7683 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7685 baseaddr
= objfile
->text_section_offset ();
7687 dwarf2_find_base_address (comp_unit_die
, cu
);
7689 /* Possibly set the default values of LOWPC and HIGHPC from
7691 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7692 &best_highpc
, cu
, pst
);
7693 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7696 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7699 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7701 /* Store the contiguous range if it is not empty; it can be
7702 empty for CUs with no code. */
7703 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7707 /* Check if comp unit has_children.
7708 If so, read the rest of the partial symbols from this comp unit.
7709 If not, there's no more debug_info for this comp unit. */
7710 if (comp_unit_die
->has_children
)
7712 struct partial_die_info
*first_die
;
7713 CORE_ADDR lowpc
, highpc
;
7715 lowpc
= ((CORE_ADDR
) -1);
7716 highpc
= ((CORE_ADDR
) 0);
7718 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7720 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7721 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7723 /* If we didn't find a lowpc, set it to highpc to avoid
7724 complaints from `maint check'. */
7725 if (lowpc
== ((CORE_ADDR
) -1))
7728 /* If the compilation unit didn't have an explicit address range,
7729 then use the information extracted from its child dies. */
7730 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7733 best_highpc
= highpc
;
7736 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7737 best_lowpc
+ baseaddr
)
7739 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7740 best_highpc
+ baseaddr
)
7745 if (!cu
->per_cu
->imported_symtabs_empty ())
7748 int len
= cu
->per_cu
->imported_symtabs_size ();
7750 /* Fill in 'dependencies' here; we fill in 'users' in a
7752 pst
->number_of_dependencies
= len
;
7754 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7755 for (i
= 0; i
< len
; ++i
)
7757 pst
->dependencies
[i
]
7758 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7761 cu
->per_cu
->imported_symtabs_free ();
7764 /* Get the list of files included in the current compilation unit,
7765 and build a psymtab for each of them. */
7766 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7768 dwarf_read_debug_printf ("Psymtab for %s unit @%s: %s - %s"
7769 ", %d global, %d static syms",
7770 per_cu
->is_debug_types
? "type" : "comp",
7771 sect_offset_str (per_cu
->sect_off
),
7772 paddress (gdbarch
, pst
->text_low (objfile
)),
7773 paddress (gdbarch
, pst
->text_high (objfile
)),
7774 (int) pst
->global_psymbols
.size (),
7775 (int) pst
->static_psymbols
.size ());
7778 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7779 Process compilation unit THIS_CU for a psymtab. */
7782 process_psymtab_comp_unit (dwarf2_per_cu_data
*this_cu
,
7783 dwarf2_per_objfile
*per_objfile
,
7784 bool want_partial_unit
,
7785 enum language pretend_language
)
7787 /* If this compilation unit was already read in, free the
7788 cached copy in order to read it in again. This is
7789 necessary because we skipped some symbols when we first
7790 read in the compilation unit (see load_partial_dies).
7791 This problem could be avoided, but the benefit is unclear. */
7792 per_objfile
->remove_cu (this_cu
);
7794 cutu_reader
reader (this_cu
, per_objfile
, nullptr, nullptr, false);
7796 switch (reader
.comp_unit_die
->tag
)
7798 case DW_TAG_compile_unit
:
7799 this_cu
->unit_type
= DW_UT_compile
;
7801 case DW_TAG_partial_unit
:
7802 this_cu
->unit_type
= DW_UT_partial
;
7812 else if (this_cu
->is_debug_types
)
7813 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7814 reader
.comp_unit_die
);
7815 else if (want_partial_unit
7816 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7817 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7818 reader
.comp_unit_die
,
7821 this_cu
->lang
= reader
.cu
->language
;
7823 /* Age out any secondary CUs. */
7824 per_objfile
->age_comp_units ();
7827 /* Reader function for build_type_psymtabs. */
7830 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7831 const gdb_byte
*info_ptr
,
7832 struct die_info
*type_unit_die
)
7834 dwarf2_per_objfile
*per_objfile
= reader
->cu
->per_objfile
;
7835 struct dwarf2_cu
*cu
= reader
->cu
;
7836 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7837 struct signatured_type
*sig_type
;
7838 struct type_unit_group
*tu_group
;
7839 struct attribute
*attr
;
7840 struct partial_die_info
*first_die
;
7841 CORE_ADDR lowpc
, highpc
;
7842 dwarf2_psymtab
*pst
;
7844 gdb_assert (per_cu
->is_debug_types
);
7845 sig_type
= (struct signatured_type
*) per_cu
;
7847 if (! type_unit_die
->has_children
)
7850 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7851 tu_group
= get_type_unit_group (cu
, attr
);
7853 if (tu_group
->tus
== nullptr)
7854 tu_group
->tus
= new std::vector
<signatured_type
*>;
7855 tu_group
->tus
->push_back (sig_type
);
7857 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7858 pst
= create_partial_symtab (per_cu
, per_objfile
, "");
7859 pst
->anonymous
= true;
7861 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7863 lowpc
= (CORE_ADDR
) -1;
7864 highpc
= (CORE_ADDR
) 0;
7865 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7870 /* Struct used to sort TUs by their abbreviation table offset. */
7872 struct tu_abbrev_offset
7874 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7875 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7878 signatured_type
*sig_type
;
7879 sect_offset abbrev_offset
;
7882 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7885 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7886 const struct tu_abbrev_offset
&b
)
7888 return a
.abbrev_offset
< b
.abbrev_offset
;
7891 /* Efficiently read all the type units.
7892 This does the bulk of the work for build_type_psymtabs.
7894 The efficiency is because we sort TUs by the abbrev table they use and
7895 only read each abbrev table once. In one program there are 200K TUs
7896 sharing 8K abbrev tables.
7898 The main purpose of this function is to support building the
7899 dwarf2_per_objfile->per_bfd->type_unit_groups table.
7900 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7901 can collapse the search space by grouping them by stmt_list.
7902 The savings can be significant, in the same program from above the 200K TUs
7903 share 8K stmt_list tables.
7905 FUNC is expected to call get_type_unit_group, which will create the
7906 struct type_unit_group if necessary and add it to
7907 dwarf2_per_objfile->per_bfd->type_unit_groups. */
7910 build_type_psymtabs_1 (dwarf2_per_objfile
*per_objfile
)
7912 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7913 abbrev_table_up abbrev_table
;
7914 sect_offset abbrev_offset
;
7916 /* It's up to the caller to not call us multiple times. */
7917 gdb_assert (per_objfile
->per_bfd
->type_unit_groups
== NULL
);
7919 if (per_objfile
->per_bfd
->all_type_units
.empty ())
7922 /* TUs typically share abbrev tables, and there can be way more TUs than
7923 abbrev tables. Sort by abbrev table to reduce the number of times we
7924 read each abbrev table in.
7925 Alternatives are to punt or to maintain a cache of abbrev tables.
7926 This is simpler and efficient enough for now.
7928 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7929 symtab to use). Typically TUs with the same abbrev offset have the same
7930 stmt_list value too so in practice this should work well.
7932 The basic algorithm here is:
7934 sort TUs by abbrev table
7935 for each TU with same abbrev table:
7936 read abbrev table if first user
7937 read TU top level DIE
7938 [IWBN if DWO skeletons had DW_AT_stmt_list]
7941 dwarf_read_debug_printf ("Building type unit groups ...");
7943 /* Sort in a separate table to maintain the order of all_type_units
7944 for .gdb_index: TU indices directly index all_type_units. */
7945 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7946 sorted_by_abbrev
.reserve (per_objfile
->per_bfd
->all_type_units
.size ());
7948 for (signatured_type
*sig_type
: per_objfile
->per_bfd
->all_type_units
)
7949 sorted_by_abbrev
.emplace_back
7950 (sig_type
, read_abbrev_offset (per_objfile
, sig_type
->per_cu
.section
,
7951 sig_type
->per_cu
.sect_off
));
7953 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7954 sort_tu_by_abbrev_offset
);
7956 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7958 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7960 /* Switch to the next abbrev table if necessary. */
7961 if (abbrev_table
== NULL
7962 || tu
.abbrev_offset
!= abbrev_offset
)
7964 abbrev_offset
= tu
.abbrev_offset
;
7965 per_objfile
->per_bfd
->abbrev
.read (per_objfile
->objfile
);
7967 abbrev_table::read (&per_objfile
->per_bfd
->abbrev
, abbrev_offset
);
7968 ++tu_stats
->nr_uniq_abbrev_tables
;
7971 cutu_reader
reader (&tu
.sig_type
->per_cu
, per_objfile
,
7972 abbrev_table
.get (), nullptr, false);
7973 if (!reader
.dummy_p
)
7974 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7975 reader
.comp_unit_die
);
7979 /* Print collected type unit statistics. */
7982 print_tu_stats (dwarf2_per_objfile
*per_objfile
)
7984 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7986 dwarf_read_debug_printf ("Type unit statistics:");
7987 dwarf_read_debug_printf (" %zu TUs",
7988 per_objfile
->per_bfd
->all_type_units
.size ());
7989 dwarf_read_debug_printf (" %d uniq abbrev tables",
7990 tu_stats
->nr_uniq_abbrev_tables
);
7991 dwarf_read_debug_printf (" %d symtabs from stmt_list entries",
7992 tu_stats
->nr_symtabs
);
7993 dwarf_read_debug_printf (" %d symtab sharers",
7994 tu_stats
->nr_symtab_sharers
);
7995 dwarf_read_debug_printf (" %d type units without a stmt_list",
7996 tu_stats
->nr_stmt_less_type_units
);
7997 dwarf_read_debug_printf (" %d all_type_units reallocs",
7998 tu_stats
->nr_all_type_units_reallocs
);
8001 /* Traversal function for build_type_psymtabs. */
8004 build_type_psymtab_dependencies (void **slot
, void *info
)
8006 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) info
;
8007 struct objfile
*objfile
= per_objfile
->objfile
;
8008 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8009 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8010 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8011 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
8014 gdb_assert (len
> 0);
8015 gdb_assert (per_cu
->type_unit_group_p ());
8017 pst
->number_of_dependencies
= len
;
8018 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8019 for (i
= 0; i
< len
; ++i
)
8021 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
8022 gdb_assert (iter
->per_cu
.is_debug_types
);
8023 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8024 iter
->type_unit_group
= tu_group
;
8027 delete tu_group
->tus
;
8028 tu_group
->tus
= nullptr;
8033 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8034 Build partial symbol tables for the .debug_types comp-units. */
8037 build_type_psymtabs (dwarf2_per_objfile
*per_objfile
)
8039 if (! create_all_type_units (per_objfile
))
8042 build_type_psymtabs_1 (per_objfile
);
8045 /* Traversal function for process_skeletonless_type_unit.
8046 Read a TU in a DWO file and build partial symbols for it. */
8049 process_skeletonless_type_unit (void **slot
, void *info
)
8051 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8052 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) info
;
8053 struct signatured_type find_entry
, *entry
;
8055 /* If this TU doesn't exist in the global table, add it and read it in. */
8057 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
8058 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
8060 find_entry
.signature
= dwo_unit
->signature
;
8061 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
8062 &find_entry
, INSERT
);
8063 /* If we've already seen this type there's nothing to do. What's happening
8064 is we're doing our own version of comdat-folding here. */
8068 /* This does the job that create_all_type_units would have done for
8070 entry
= add_type_unit (per_objfile
, dwo_unit
->signature
, slot
);
8071 fill_in_sig_entry_from_dwo_entry (per_objfile
, entry
, dwo_unit
);
8074 /* This does the job that build_type_psymtabs_1 would have done. */
8075 cutu_reader
reader (&entry
->per_cu
, per_objfile
, nullptr, nullptr, false);
8076 if (!reader
.dummy_p
)
8077 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
8078 reader
.comp_unit_die
);
8083 /* Traversal function for process_skeletonless_type_units. */
8086 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8088 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8090 if (dwo_file
->tus
!= NULL
)
8091 htab_traverse_noresize (dwo_file
->tus
.get (),
8092 process_skeletonless_type_unit
, info
);
8097 /* Scan all TUs of DWO files, verifying we've processed them.
8098 This is needed in case a TU was emitted without its skeleton.
8099 Note: This can't be done until we know what all the DWO files are. */
8102 process_skeletonless_type_units (dwarf2_per_objfile
*per_objfile
)
8104 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8105 if (get_dwp_file (per_objfile
) == NULL
8106 && per_objfile
->per_bfd
->dwo_files
!= NULL
)
8108 htab_traverse_noresize (per_objfile
->per_bfd
->dwo_files
.get (),
8109 process_dwo_file_for_skeletonless_type_units
,
8114 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8117 set_partial_user (dwarf2_per_objfile
*per_objfile
)
8119 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
8121 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8126 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8128 /* Set the 'user' field only if it is not already set. */
8129 if (pst
->dependencies
[j
]->user
== NULL
)
8130 pst
->dependencies
[j
]->user
= pst
;
8135 /* Build the partial symbol table by doing a quick pass through the
8136 .debug_info and .debug_abbrev sections. */
8139 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
*per_objfile
)
8141 struct objfile
*objfile
= per_objfile
->objfile
;
8143 dwarf_read_debug_printf ("Building psymtabs of objfile %s ...",
8144 objfile_name (objfile
));
8146 scoped_restore restore_reading_psyms
8147 = make_scoped_restore (&per_objfile
->per_bfd
->reading_partial_symbols
,
8150 per_objfile
->per_bfd
->info
.read (objfile
);
8152 /* Any cached compilation units will be linked by the per-objfile
8153 read_in_chain. Make sure to free them when we're done. */
8154 free_cached_comp_units
freer (per_objfile
);
8156 build_type_psymtabs (per_objfile
);
8158 create_all_comp_units (per_objfile
);
8160 /* Create a temporary address map on a temporary obstack. We later
8161 copy this to the final obstack. */
8162 auto_obstack temp_obstack
;
8164 scoped_restore save_psymtabs_addrmap
8165 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8166 addrmap_create_mutable (&temp_obstack
));
8168 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
8170 if (per_cu
->v
.psymtab
!= NULL
)
8171 /* In case a forward DW_TAG_imported_unit has read the CU already. */
8173 process_psymtab_comp_unit (per_cu
, per_objfile
, false,
8177 /* This has to wait until we read the CUs, we need the list of DWOs. */
8178 process_skeletonless_type_units (per_objfile
);
8180 /* Now that all TUs have been processed we can fill in the dependencies. */
8181 if (per_objfile
->per_bfd
->type_unit_groups
!= NULL
)
8183 htab_traverse_noresize (per_objfile
->per_bfd
->type_unit_groups
.get (),
8184 build_type_psymtab_dependencies
, per_objfile
);
8187 if (dwarf_read_debug
> 0)
8188 print_tu_stats (per_objfile
);
8190 set_partial_user (per_objfile
);
8192 objfile
->partial_symtabs
->psymtabs_addrmap
8193 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8194 objfile
->partial_symtabs
->obstack ());
8195 /* At this point we want to keep the address map. */
8196 save_psymtabs_addrmap
.release ();
8198 dwarf_read_debug_printf ("Done building psymtabs of %s",
8199 objfile_name (objfile
));
8202 /* Load the partial DIEs for a secondary CU into memory.
8203 This is also used when rereading a primary CU with load_all_dies. */
8206 load_partial_comp_unit (dwarf2_per_cu_data
*this_cu
,
8207 dwarf2_per_objfile
*per_objfile
,
8208 dwarf2_cu
*existing_cu
)
8210 cutu_reader
reader (this_cu
, per_objfile
, nullptr, existing_cu
, false);
8212 if (!reader
.dummy_p
)
8214 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
8217 /* Check if comp unit has_children.
8218 If so, read the rest of the partial symbols from this comp unit.
8219 If not, there's no more debug_info for this comp unit. */
8220 if (reader
.comp_unit_die
->has_children
)
8221 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8228 read_comp_units_from_section (dwarf2_per_objfile
*per_objfile
,
8229 struct dwarf2_section_info
*section
,
8230 struct dwarf2_section_info
*abbrev_section
,
8231 unsigned int is_dwz
)
8233 const gdb_byte
*info_ptr
;
8234 struct objfile
*objfile
= per_objfile
->objfile
;
8236 dwarf_read_debug_printf ("Reading %s for %s",
8237 section
->get_name (),
8238 section
->get_file_name ());
8240 section
->read (objfile
);
8242 info_ptr
= section
->buffer
;
8244 while (info_ptr
< section
->buffer
+ section
->size
)
8246 struct dwarf2_per_cu_data
*this_cu
;
8248 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8250 comp_unit_head cu_header
;
8251 read_and_check_comp_unit_head (per_objfile
, &cu_header
, section
,
8252 abbrev_section
, info_ptr
,
8253 rcuh_kind::COMPILE
);
8255 /* Save the compilation unit for later lookup. */
8256 if (cu_header
.unit_type
!= DW_UT_type
)
8257 this_cu
= per_objfile
->per_bfd
->allocate_per_cu ();
8260 auto sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
8261 sig_type
->signature
= cu_header
.signature
;
8262 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8263 this_cu
= &sig_type
->per_cu
;
8265 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8266 this_cu
->sect_off
= sect_off
;
8267 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8268 this_cu
->is_dwz
= is_dwz
;
8269 this_cu
->section
= section
;
8271 per_objfile
->per_bfd
->all_comp_units
.push_back (this_cu
);
8273 info_ptr
= info_ptr
+ this_cu
->length
;
8277 /* Create a list of all compilation units in OBJFILE.
8278 This is only done for -readnow and building partial symtabs. */
8281 create_all_comp_units (dwarf2_per_objfile
*per_objfile
)
8283 gdb_assert (per_objfile
->per_bfd
->all_comp_units
.empty ());
8284 read_comp_units_from_section (per_objfile
, &per_objfile
->per_bfd
->info
,
8285 &per_objfile
->per_bfd
->abbrev
, 0);
8287 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
8289 read_comp_units_from_section (per_objfile
, &dwz
->info
, &dwz
->abbrev
, 1);
8292 /* Process all loaded DIEs for compilation unit CU, starting at
8293 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8294 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8295 DW_AT_ranges). See the comments of add_partial_subprogram on how
8296 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8299 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8300 CORE_ADDR
*highpc
, int set_addrmap
,
8301 struct dwarf2_cu
*cu
)
8303 struct partial_die_info
*pdi
;
8305 /* Now, march along the PDI's, descending into ones which have
8306 interesting children but skipping the children of the other ones,
8307 until we reach the end of the compilation unit. */
8315 /* Anonymous namespaces or modules have no name but have interesting
8316 children, so we need to look at them. Ditto for anonymous
8319 if (pdi
->raw_name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8320 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8321 || pdi
->tag
== DW_TAG_imported_unit
8322 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8326 case DW_TAG_subprogram
:
8327 case DW_TAG_inlined_subroutine
:
8328 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8329 if (cu
->language
== language_cplus
)
8330 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8333 case DW_TAG_constant
:
8334 case DW_TAG_variable
:
8335 case DW_TAG_typedef
:
8336 case DW_TAG_union_type
:
8337 if (!pdi
->is_declaration
8338 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8340 add_partial_symbol (pdi
, cu
);
8343 case DW_TAG_class_type
:
8344 case DW_TAG_interface_type
:
8345 case DW_TAG_structure_type
:
8346 if (!pdi
->is_declaration
)
8348 add_partial_symbol (pdi
, cu
);
8350 if ((cu
->language
== language_rust
8351 || cu
->language
== language_cplus
) && pdi
->has_children
)
8352 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8355 case DW_TAG_enumeration_type
:
8356 if (!pdi
->is_declaration
)
8357 add_partial_enumeration (pdi
, cu
);
8359 case DW_TAG_base_type
:
8360 case DW_TAG_subrange_type
:
8361 /* File scope base type definitions are added to the partial
8363 add_partial_symbol (pdi
, cu
);
8365 case DW_TAG_namespace
:
8366 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8369 if (!pdi
->is_declaration
)
8370 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8372 case DW_TAG_imported_unit
:
8374 struct dwarf2_per_cu_data
*per_cu
;
8376 /* For now we don't handle imported units in type units. */
8377 if (cu
->per_cu
->is_debug_types
)
8379 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8380 " supported in type units [in module %s]"),
8381 objfile_name (cu
->per_objfile
->objfile
));
8384 per_cu
= dwarf2_find_containing_comp_unit
8385 (pdi
->d
.sect_off
, pdi
->is_dwz
, cu
->per_objfile
);
8387 /* Go read the partial unit, if needed. */
8388 if (per_cu
->v
.psymtab
== NULL
)
8389 process_psymtab_comp_unit (per_cu
, cu
->per_objfile
, true,
8392 cu
->per_cu
->imported_symtabs_push (per_cu
);
8395 case DW_TAG_imported_declaration
:
8396 add_partial_symbol (pdi
, cu
);
8403 /* If the die has a sibling, skip to the sibling. */
8405 pdi
= pdi
->die_sibling
;
8409 /* Functions used to compute the fully scoped name of a partial DIE.
8411 Normally, this is simple. For C++, the parent DIE's fully scoped
8412 name is concatenated with "::" and the partial DIE's name.
8413 Enumerators are an exception; they use the scope of their parent
8414 enumeration type, i.e. the name of the enumeration type is not
8415 prepended to the enumerator.
8417 There are two complexities. One is DW_AT_specification; in this
8418 case "parent" means the parent of the target of the specification,
8419 instead of the direct parent of the DIE. The other is compilers
8420 which do not emit DW_TAG_namespace; in this case we try to guess
8421 the fully qualified name of structure types from their members'
8422 linkage names. This must be done using the DIE's children rather
8423 than the children of any DW_AT_specification target. We only need
8424 to do this for structures at the top level, i.e. if the target of
8425 any DW_AT_specification (if any; otherwise the DIE itself) does not
8428 /* Compute the scope prefix associated with PDI's parent, in
8429 compilation unit CU. The result will be allocated on CU's
8430 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8431 field. NULL is returned if no prefix is necessary. */
8433 partial_die_parent_scope (struct partial_die_info
*pdi
,
8434 struct dwarf2_cu
*cu
)
8436 const char *grandparent_scope
;
8437 struct partial_die_info
*parent
, *real_pdi
;
8439 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8440 then this means the parent of the specification DIE. */
8443 while (real_pdi
->has_specification
)
8445 auto res
= find_partial_die (real_pdi
->spec_offset
,
8446 real_pdi
->spec_is_dwz
, cu
);
8451 parent
= real_pdi
->die_parent
;
8455 if (parent
->scope_set
)
8456 return parent
->scope
;
8460 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8462 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8463 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8464 Work around this problem here. */
8465 if (cu
->language
== language_cplus
8466 && parent
->tag
== DW_TAG_namespace
8467 && strcmp (parent
->name (cu
), "::") == 0
8468 && grandparent_scope
== NULL
)
8470 parent
->scope
= NULL
;
8471 parent
->scope_set
= 1;
8475 /* Nested subroutines in Fortran get a prefix. */
8476 if (pdi
->tag
== DW_TAG_enumerator
)
8477 /* Enumerators should not get the name of the enumeration as a prefix. */
8478 parent
->scope
= grandparent_scope
;
8479 else if (parent
->tag
== DW_TAG_namespace
8480 || parent
->tag
== DW_TAG_module
8481 || parent
->tag
== DW_TAG_structure_type
8482 || parent
->tag
== DW_TAG_class_type
8483 || parent
->tag
== DW_TAG_interface_type
8484 || parent
->tag
== DW_TAG_union_type
8485 || parent
->tag
== DW_TAG_enumeration_type
8486 || (cu
->language
== language_fortran
8487 && parent
->tag
== DW_TAG_subprogram
8488 && pdi
->tag
== DW_TAG_subprogram
))
8490 if (grandparent_scope
== NULL
)
8491 parent
->scope
= parent
->name (cu
);
8493 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8495 parent
->name (cu
), 0, cu
);
8499 /* FIXME drow/2004-04-01: What should we be doing with
8500 function-local names? For partial symbols, we should probably be
8502 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8503 dwarf_tag_name (parent
->tag
),
8504 sect_offset_str (pdi
->sect_off
));
8505 parent
->scope
= grandparent_scope
;
8508 parent
->scope_set
= 1;
8509 return parent
->scope
;
8512 /* Return the fully scoped name associated with PDI, from compilation unit
8513 CU. The result will be allocated with malloc. */
8515 static gdb::unique_xmalloc_ptr
<char>
8516 partial_die_full_name (struct partial_die_info
*pdi
,
8517 struct dwarf2_cu
*cu
)
8519 const char *parent_scope
;
8521 /* If this is a template instantiation, we can not work out the
8522 template arguments from partial DIEs. So, unfortunately, we have
8523 to go through the full DIEs. At least any work we do building
8524 types here will be reused if full symbols are loaded later. */
8525 if (pdi
->has_template_arguments
)
8529 if (pdi
->name (cu
) != NULL
&& strchr (pdi
->name (cu
), '<') == NULL
)
8531 struct die_info
*die
;
8532 struct attribute attr
;
8533 struct dwarf2_cu
*ref_cu
= cu
;
8535 /* DW_FORM_ref_addr is using section offset. */
8536 attr
.name
= (enum dwarf_attribute
) 0;
8537 attr
.form
= DW_FORM_ref_addr
;
8538 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8539 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8541 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8545 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8546 if (parent_scope
== NULL
)
8549 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8555 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8557 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
8558 struct objfile
*objfile
= per_objfile
->objfile
;
8559 struct gdbarch
*gdbarch
= objfile
->arch ();
8561 const char *actual_name
= NULL
;
8564 baseaddr
= objfile
->text_section_offset ();
8566 gdb::unique_xmalloc_ptr
<char> built_actual_name
8567 = partial_die_full_name (pdi
, cu
);
8568 if (built_actual_name
!= NULL
)
8569 actual_name
= built_actual_name
.get ();
8571 if (actual_name
== NULL
)
8572 actual_name
= pdi
->name (cu
);
8574 partial_symbol psymbol
;
8575 memset (&psymbol
, 0, sizeof (psymbol
));
8576 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8577 psymbol
.ginfo
.section
= -1;
8579 /* The code below indicates that the psymbol should be installed by
8581 gdb::optional
<psymbol_placement
> where
;
8585 case DW_TAG_inlined_subroutine
:
8586 case DW_TAG_subprogram
:
8587 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8589 if (pdi
->is_external
8590 || cu
->language
== language_ada
8591 || (cu
->language
== language_fortran
8592 && pdi
->die_parent
!= NULL
8593 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8595 /* Normally, only "external" DIEs are part of the global scope.
8596 But in Ada and Fortran, we want to be able to access nested
8597 procedures globally. So all Ada and Fortran subprograms are
8598 stored in the global scope. */
8599 where
= psymbol_placement::GLOBAL
;
8602 where
= psymbol_placement::STATIC
;
8604 psymbol
.domain
= VAR_DOMAIN
;
8605 psymbol
.aclass
= LOC_BLOCK
;
8606 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8607 psymbol
.ginfo
.value
.address
= addr
;
8609 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8610 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8612 case DW_TAG_constant
:
8613 psymbol
.domain
= VAR_DOMAIN
;
8614 psymbol
.aclass
= LOC_STATIC
;
8615 where
= (pdi
->is_external
8616 ? psymbol_placement::GLOBAL
8617 : psymbol_placement::STATIC
);
8619 case DW_TAG_variable
:
8621 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8625 && !per_objfile
->per_bfd
->has_section_at_zero
)
8627 /* A global or static variable may also have been stripped
8628 out by the linker if unused, in which case its address
8629 will be nullified; do not add such variables into partial
8630 symbol table then. */
8632 else if (pdi
->is_external
)
8635 Don't enter into the minimal symbol tables as there is
8636 a minimal symbol table entry from the ELF symbols already.
8637 Enter into partial symbol table if it has a location
8638 descriptor or a type.
8639 If the location descriptor is missing, new_symbol will create
8640 a LOC_UNRESOLVED symbol, the address of the variable will then
8641 be determined from the minimal symbol table whenever the variable
8643 The address for the partial symbol table entry is not
8644 used by GDB, but it comes in handy for debugging partial symbol
8647 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8649 psymbol
.domain
= VAR_DOMAIN
;
8650 psymbol
.aclass
= LOC_STATIC
;
8651 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8652 psymbol
.ginfo
.value
.address
= addr
;
8653 where
= psymbol_placement::GLOBAL
;
8658 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8660 /* Static Variable. Skip symbols whose value we cannot know (those
8661 without location descriptors or constant values). */
8662 if (!has_loc
&& !pdi
->has_const_value
)
8665 psymbol
.domain
= VAR_DOMAIN
;
8666 psymbol
.aclass
= LOC_STATIC
;
8667 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8669 psymbol
.ginfo
.value
.address
= addr
;
8670 where
= psymbol_placement::STATIC
;
8673 case DW_TAG_array_type
:
8674 case DW_TAG_typedef
:
8675 case DW_TAG_base_type
:
8676 case DW_TAG_subrange_type
:
8677 psymbol
.domain
= VAR_DOMAIN
;
8678 psymbol
.aclass
= LOC_TYPEDEF
;
8679 where
= psymbol_placement::STATIC
;
8681 case DW_TAG_imported_declaration
:
8682 case DW_TAG_namespace
:
8683 psymbol
.domain
= VAR_DOMAIN
;
8684 psymbol
.aclass
= LOC_TYPEDEF
;
8685 where
= psymbol_placement::GLOBAL
;
8688 /* With Fortran 77 there might be a "BLOCK DATA" module
8689 available without any name. If so, we skip the module as it
8690 doesn't bring any value. */
8691 if (actual_name
!= nullptr)
8693 psymbol
.domain
= MODULE_DOMAIN
;
8694 psymbol
.aclass
= LOC_TYPEDEF
;
8695 where
= psymbol_placement::GLOBAL
;
8698 case DW_TAG_class_type
:
8699 case DW_TAG_interface_type
:
8700 case DW_TAG_structure_type
:
8701 case DW_TAG_union_type
:
8702 case DW_TAG_enumeration_type
:
8703 /* Skip external references. The DWARF standard says in the section
8704 about "Structure, Union, and Class Type Entries": "An incomplete
8705 structure, union or class type is represented by a structure,
8706 union or class entry that does not have a byte size attribute
8707 and that has a DW_AT_declaration attribute." */
8708 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8711 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8712 static vs. global. */
8713 psymbol
.domain
= STRUCT_DOMAIN
;
8714 psymbol
.aclass
= LOC_TYPEDEF
;
8715 where
= (cu
->language
== language_cplus
8716 ? psymbol_placement::GLOBAL
8717 : psymbol_placement::STATIC
);
8719 case DW_TAG_enumerator
:
8720 psymbol
.domain
= VAR_DOMAIN
;
8721 psymbol
.aclass
= LOC_CONST
;
8722 where
= (cu
->language
== language_cplus
8723 ? psymbol_placement::GLOBAL
8724 : psymbol_placement::STATIC
);
8730 if (where
.has_value ())
8732 if (built_actual_name
!= nullptr)
8733 actual_name
= objfile
->intern (actual_name
);
8734 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8735 psymbol
.ginfo
.set_linkage_name (actual_name
);
8738 psymbol
.ginfo
.set_demangled_name (actual_name
,
8739 &objfile
->objfile_obstack
);
8740 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8742 cu
->per_cu
->v
.psymtab
->add_psymbol (psymbol
, *where
, objfile
);
8746 /* Read a partial die corresponding to a namespace; also, add a symbol
8747 corresponding to that namespace to the symbol table. NAMESPACE is
8748 the name of the enclosing namespace. */
8751 add_partial_namespace (struct partial_die_info
*pdi
,
8752 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8753 int set_addrmap
, struct dwarf2_cu
*cu
)
8755 /* Add a symbol for the namespace. */
8757 add_partial_symbol (pdi
, cu
);
8759 /* Now scan partial symbols in that namespace. */
8761 if (pdi
->has_children
)
8762 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8765 /* Read a partial die corresponding to a Fortran module. */
8768 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8769 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8771 /* Add a symbol for the namespace. */
8773 add_partial_symbol (pdi
, cu
);
8775 /* Now scan partial symbols in that module. */
8777 if (pdi
->has_children
)
8778 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8781 /* Read a partial die corresponding to a subprogram or an inlined
8782 subprogram and create a partial symbol for that subprogram.
8783 When the CU language allows it, this routine also defines a partial
8784 symbol for each nested subprogram that this subprogram contains.
8785 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8786 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8788 PDI may also be a lexical block, in which case we simply search
8789 recursively for subprograms defined inside that lexical block.
8790 Again, this is only performed when the CU language allows this
8791 type of definitions. */
8794 add_partial_subprogram (struct partial_die_info
*pdi
,
8795 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8796 int set_addrmap
, struct dwarf2_cu
*cu
)
8798 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8800 if (pdi
->has_pc_info
)
8802 if (pdi
->lowpc
< *lowpc
)
8803 *lowpc
= pdi
->lowpc
;
8804 if (pdi
->highpc
> *highpc
)
8805 *highpc
= pdi
->highpc
;
8808 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
8809 struct gdbarch
*gdbarch
= objfile
->arch ();
8811 CORE_ADDR this_highpc
;
8812 CORE_ADDR this_lowpc
;
8814 baseaddr
= objfile
->text_section_offset ();
8816 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8817 pdi
->lowpc
+ baseaddr
)
8820 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8821 pdi
->highpc
+ baseaddr
)
8823 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8824 this_lowpc
, this_highpc
- 1,
8825 cu
->per_cu
->v
.psymtab
);
8829 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8831 if (!pdi
->is_declaration
)
8832 /* Ignore subprogram DIEs that do not have a name, they are
8833 illegal. Do not emit a complaint at this point, we will
8834 do so when we convert this psymtab into a symtab. */
8836 add_partial_symbol (pdi
, cu
);
8840 if (! pdi
->has_children
)
8843 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8845 pdi
= pdi
->die_child
;
8849 if (pdi
->tag
== DW_TAG_subprogram
8850 || pdi
->tag
== DW_TAG_inlined_subroutine
8851 || pdi
->tag
== DW_TAG_lexical_block
)
8852 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8853 pdi
= pdi
->die_sibling
;
8858 /* Read a partial die corresponding to an enumeration type. */
8861 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8862 struct dwarf2_cu
*cu
)
8864 struct partial_die_info
*pdi
;
8866 if (enum_pdi
->name (cu
) != NULL
)
8867 add_partial_symbol (enum_pdi
, cu
);
8869 pdi
= enum_pdi
->die_child
;
8872 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->raw_name
== NULL
)
8873 complaint (_("malformed enumerator DIE ignored"));
8875 add_partial_symbol (pdi
, cu
);
8876 pdi
= pdi
->die_sibling
;
8880 /* Return the initial uleb128 in the die at INFO_PTR. */
8883 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8885 unsigned int bytes_read
;
8887 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8890 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8891 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8893 Return the corresponding abbrev, or NULL if the number is zero (indicating
8894 an empty DIE). In either case *BYTES_READ will be set to the length of
8895 the initial number. */
8897 static struct abbrev_info
*
8898 peek_die_abbrev (const die_reader_specs
&reader
,
8899 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8901 dwarf2_cu
*cu
= reader
.cu
;
8902 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
8903 unsigned int abbrev_number
8904 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8906 if (abbrev_number
== 0)
8909 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8912 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8913 " at offset %s [in module %s]"),
8914 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8915 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8921 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8922 Returns a pointer to the end of a series of DIEs, terminated by an empty
8923 DIE. Any children of the skipped DIEs will also be skipped. */
8925 static const gdb_byte
*
8926 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8930 unsigned int bytes_read
;
8931 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8934 return info_ptr
+ bytes_read
;
8936 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8940 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8941 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8942 abbrev corresponding to that skipped uleb128 should be passed in
8943 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8946 static const gdb_byte
*
8947 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8948 struct abbrev_info
*abbrev
)
8950 unsigned int bytes_read
;
8951 struct attribute attr
;
8952 bfd
*abfd
= reader
->abfd
;
8953 struct dwarf2_cu
*cu
= reader
->cu
;
8954 const gdb_byte
*buffer
= reader
->buffer
;
8955 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8956 unsigned int form
, i
;
8958 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8960 /* The only abbrev we care about is DW_AT_sibling. */
8961 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8963 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
8964 if (attr
.form
== DW_FORM_ref_addr
)
8965 complaint (_("ignoring absolute DW_AT_sibling"));
8968 sect_offset off
= attr
.get_ref_die_offset ();
8969 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8971 if (sibling_ptr
< info_ptr
)
8972 complaint (_("DW_AT_sibling points backwards"));
8973 else if (sibling_ptr
> reader
->buffer_end
)
8974 reader
->die_section
->overflow_complaint ();
8980 /* If it isn't DW_AT_sibling, skip this attribute. */
8981 form
= abbrev
->attrs
[i
].form
;
8985 case DW_FORM_ref_addr
:
8986 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8987 and later it is offset sized. */
8988 if (cu
->header
.version
== 2)
8989 info_ptr
+= cu
->header
.addr_size
;
8991 info_ptr
+= cu
->header
.offset_size
;
8993 case DW_FORM_GNU_ref_alt
:
8994 info_ptr
+= cu
->header
.offset_size
;
8997 info_ptr
+= cu
->header
.addr_size
;
9005 case DW_FORM_flag_present
:
9006 case DW_FORM_implicit_const
:
9023 case DW_FORM_ref_sig8
:
9026 case DW_FORM_data16
:
9029 case DW_FORM_string
:
9030 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9031 info_ptr
+= bytes_read
;
9033 case DW_FORM_sec_offset
:
9035 case DW_FORM_GNU_strp_alt
:
9036 info_ptr
+= cu
->header
.offset_size
;
9038 case DW_FORM_exprloc
:
9040 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9041 info_ptr
+= bytes_read
;
9043 case DW_FORM_block1
:
9044 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9046 case DW_FORM_block2
:
9047 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9049 case DW_FORM_block4
:
9050 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9056 case DW_FORM_ref_udata
:
9057 case DW_FORM_GNU_addr_index
:
9058 case DW_FORM_GNU_str_index
:
9059 case DW_FORM_rnglistx
:
9060 case DW_FORM_loclistx
:
9061 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9063 case DW_FORM_indirect
:
9064 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9065 info_ptr
+= bytes_read
;
9066 /* We need to continue parsing from here, so just go back to
9068 goto skip_attribute
;
9071 error (_("Dwarf Error: Cannot handle %s "
9072 "in DWARF reader [in module %s]"),
9073 dwarf_form_name (form
),
9074 bfd_get_filename (abfd
));
9078 if (abbrev
->has_children
)
9079 return skip_children (reader
, info_ptr
);
9084 /* Locate ORIG_PDI's sibling.
9085 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9087 static const gdb_byte
*
9088 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9089 struct partial_die_info
*orig_pdi
,
9090 const gdb_byte
*info_ptr
)
9092 /* Do we know the sibling already? */
9094 if (orig_pdi
->sibling
)
9095 return orig_pdi
->sibling
;
9097 /* Are there any children to deal with? */
9099 if (!orig_pdi
->has_children
)
9102 /* Skip the children the long way. */
9104 return skip_children (reader
, info_ptr
);
9107 /* Expand this partial symbol table into a full symbol table. SELF is
9111 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
9113 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9115 gdb_assert (!per_objfile
->symtab_set_p (per_cu_data
));
9117 /* If this psymtab is constructed from a debug-only objfile, the
9118 has_section_at_zero flag will not necessarily be correct. We
9119 can get the correct value for this flag by looking at the data
9120 associated with the (presumably stripped) associated objfile. */
9121 if (objfile
->separate_debug_objfile_backlink
)
9123 dwarf2_per_objfile
*per_objfile_backlink
9124 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9126 per_objfile
->per_bfd
->has_section_at_zero
9127 = per_objfile_backlink
->per_bfd
->has_section_at_zero
;
9130 expand_psymtab (objfile
);
9132 process_cu_includes (per_objfile
);
9135 /* Reading in full CUs. */
9137 /* Add PER_CU to the queue. */
9140 queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
9141 dwarf2_per_objfile
*per_objfile
,
9142 enum language pretend_language
)
9145 per_cu
->per_bfd
->queue
.emplace (per_cu
, per_objfile
, pretend_language
);
9148 /* If PER_CU is not yet queued, add it to the queue.
9149 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9151 The result is non-zero if PER_CU was queued, otherwise the result is zero
9152 meaning either PER_CU is already queued or it is already loaded.
9154 N.B. There is an invariant here that if a CU is queued then it is loaded.
9155 The caller is required to load PER_CU if we return non-zero. */
9158 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9159 dwarf2_per_cu_data
*per_cu
,
9160 dwarf2_per_objfile
*per_objfile
,
9161 enum language pretend_language
)
9163 /* We may arrive here during partial symbol reading, if we need full
9164 DIEs to process an unusual case (e.g. template arguments). Do
9165 not queue PER_CU, just tell our caller to load its DIEs. */
9166 if (per_cu
->per_bfd
->reading_partial_symbols
)
9168 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9170 if (cu
== NULL
|| cu
->dies
== NULL
)
9175 /* Mark the dependence relation so that we don't flush PER_CU
9177 if (dependent_cu
!= NULL
)
9178 dwarf2_add_dependence (dependent_cu
, per_cu
);
9180 /* If it's already on the queue, we have nothing to do. */
9183 /* Verify the invariant that if a CU is queued for expansion, its DIEs are
9185 gdb_assert (per_objfile
->get_cu (per_cu
) != nullptr);
9189 /* If the compilation unit is already loaded, just mark it as
9191 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9198 /* Add it to the queue. */
9199 queue_comp_unit (per_cu
, per_objfile
, pretend_language
);
9204 /* Process the queue. */
9207 process_queue (dwarf2_per_objfile
*per_objfile
)
9209 dwarf_read_debug_printf ("Expanding one or more symtabs of objfile %s ...",
9210 objfile_name (per_objfile
->objfile
));
9212 /* The queue starts out with one item, but following a DIE reference
9213 may load a new CU, adding it to the end of the queue. */
9214 while (!per_objfile
->per_bfd
->queue
.empty ())
9216 dwarf2_queue_item
&item
= per_objfile
->per_bfd
->queue
.front ();
9217 dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
9219 if (!per_objfile
->symtab_set_p (per_cu
))
9221 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9223 /* Skip dummy CUs. */
9226 unsigned int debug_print_threshold
;
9229 if (per_cu
->is_debug_types
)
9231 struct signatured_type
*sig_type
=
9232 (struct signatured_type
*) per_cu
;
9234 sprintf (buf
, "TU %s at offset %s",
9235 hex_string (sig_type
->signature
),
9236 sect_offset_str (per_cu
->sect_off
));
9237 /* There can be 100s of TUs.
9238 Only print them in verbose mode. */
9239 debug_print_threshold
= 2;
9243 sprintf (buf
, "CU at offset %s",
9244 sect_offset_str (per_cu
->sect_off
));
9245 debug_print_threshold
= 1;
9248 if (dwarf_read_debug
>= debug_print_threshold
)
9249 dwarf_read_debug_printf ("Expanding symtab of %s", buf
);
9251 if (per_cu
->is_debug_types
)
9252 process_full_type_unit (cu
, item
.pretend_language
);
9254 process_full_comp_unit (cu
, item
.pretend_language
);
9256 if (dwarf_read_debug
>= debug_print_threshold
)
9257 dwarf_read_debug_printf ("Done expanding %s", buf
);
9262 per_objfile
->per_bfd
->queue
.pop ();
9265 dwarf_read_debug_printf ("Done expanding symtabs of %s.",
9266 objfile_name (per_objfile
->objfile
));
9269 /* Read in full symbols for PST, and anything it depends on. */
9272 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9274 gdb_assert (!readin_p (objfile
));
9276 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9277 free_cached_comp_units
freer (per_objfile
);
9278 expand_dependencies (objfile
);
9280 dw2_do_instantiate_symtab (per_cu_data
, per_objfile
, false);
9281 gdb_assert (get_compunit_symtab (objfile
) != nullptr);
9284 /* See psympriv.h. */
9287 dwarf2_psymtab::readin_p (struct objfile
*objfile
) const
9289 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9290 return per_objfile
->symtab_set_p (per_cu_data
);
9293 /* See psympriv.h. */
9296 dwarf2_psymtab::get_compunit_symtab (struct objfile
*objfile
) const
9298 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9299 return per_objfile
->get_symtab (per_cu_data
);
9302 /* Trivial hash function for die_info: the hash value of a DIE
9303 is its offset in .debug_info for this objfile. */
9306 die_hash (const void *item
)
9308 const struct die_info
*die
= (const struct die_info
*) item
;
9310 return to_underlying (die
->sect_off
);
9313 /* Trivial comparison function for die_info structures: two DIEs
9314 are equal if they have the same offset. */
9317 die_eq (const void *item_lhs
, const void *item_rhs
)
9319 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9320 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9322 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9325 /* Load the DIEs associated with PER_CU into memory.
9327 In some cases, the caller, while reading partial symbols, will need to load
9328 the full symbols for the CU for some reason. It will already have a
9329 dwarf2_cu object for THIS_CU and pass it as EXISTING_CU, so it can be re-used
9330 rather than creating a new one. */
9333 load_full_comp_unit (dwarf2_per_cu_data
*this_cu
,
9334 dwarf2_per_objfile
*per_objfile
,
9335 dwarf2_cu
*existing_cu
,
9337 enum language pretend_language
)
9339 gdb_assert (! this_cu
->is_debug_types
);
9341 cutu_reader
reader (this_cu
, per_objfile
, NULL
, existing_cu
, skip_partial
);
9345 struct dwarf2_cu
*cu
= reader
.cu
;
9346 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9348 gdb_assert (cu
->die_hash
== NULL
);
9350 htab_create_alloc_ex (cu
->header
.length
/ 12,
9354 &cu
->comp_unit_obstack
,
9355 hashtab_obstack_allocate
,
9356 dummy_obstack_deallocate
);
9358 if (reader
.comp_unit_die
->has_children
)
9359 reader
.comp_unit_die
->child
9360 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9361 &info_ptr
, reader
.comp_unit_die
);
9362 cu
->dies
= reader
.comp_unit_die
;
9363 /* comp_unit_die is not stored in die_hash, no need. */
9365 /* We try not to read any attributes in this function, because not
9366 all CUs needed for references have been loaded yet, and symbol
9367 table processing isn't initialized. But we have to set the CU language,
9368 or we won't be able to build types correctly.
9369 Similarly, if we do not read the producer, we can not apply
9370 producer-specific interpretation. */
9371 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9376 /* Add a DIE to the delayed physname list. */
9379 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9380 const char *name
, struct die_info
*die
,
9381 struct dwarf2_cu
*cu
)
9383 struct delayed_method_info mi
;
9385 mi
.fnfield_index
= fnfield_index
;
9389 cu
->method_list
.push_back (mi
);
9392 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9393 "const" / "volatile". If so, decrements LEN by the length of the
9394 modifier and return true. Otherwise return false. */
9398 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9400 size_t mod_len
= sizeof (mod
) - 1;
9401 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9409 /* Compute the physnames of any methods on the CU's method list.
9411 The computation of method physnames is delayed in order to avoid the
9412 (bad) condition that one of the method's formal parameters is of an as yet
9416 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9418 /* Only C++ delays computing physnames. */
9419 if (cu
->method_list
.empty ())
9421 gdb_assert (cu
->language
== language_cplus
);
9423 for (const delayed_method_info
&mi
: cu
->method_list
)
9425 const char *physname
;
9426 struct fn_fieldlist
*fn_flp
9427 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9428 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9429 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9430 = physname
? physname
: "";
9432 /* Since there's no tag to indicate whether a method is a
9433 const/volatile overload, extract that information out of the
9435 if (physname
!= NULL
)
9437 size_t len
= strlen (physname
);
9441 if (physname
[len
] == ')') /* shortcut */
9443 else if (check_modifier (physname
, len
, " const"))
9444 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9445 else if (check_modifier (physname
, len
, " volatile"))
9446 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9453 /* The list is no longer needed. */
9454 cu
->method_list
.clear ();
9457 /* Go objects should be embedded in a DW_TAG_module DIE,
9458 and it's not clear if/how imported objects will appear.
9459 To keep Go support simple until that's worked out,
9460 go back through what we've read and create something usable.
9461 We could do this while processing each DIE, and feels kinda cleaner,
9462 but that way is more invasive.
9463 This is to, for example, allow the user to type "p var" or "b main"
9464 without having to specify the package name, and allow lookups
9465 of module.object to work in contexts that use the expression
9469 fixup_go_packaging (struct dwarf2_cu
*cu
)
9471 gdb::unique_xmalloc_ptr
<char> package_name
;
9472 struct pending
*list
;
9475 for (list
= *cu
->get_builder ()->get_global_symbols ();
9479 for (i
= 0; i
< list
->nsyms
; ++i
)
9481 struct symbol
*sym
= list
->symbol
[i
];
9483 if (sym
->language () == language_go
9484 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9486 gdb::unique_xmalloc_ptr
<char> this_package_name
9487 (go_symbol_package_name (sym
));
9489 if (this_package_name
== NULL
)
9491 if (package_name
== NULL
)
9492 package_name
= std::move (this_package_name
);
9495 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9496 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9497 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9498 (symbol_symtab (sym
) != NULL
9499 ? symtab_to_filename_for_display
9500 (symbol_symtab (sym
))
9501 : objfile_name (objfile
)),
9502 this_package_name
.get (), package_name
.get ());
9508 if (package_name
!= NULL
)
9510 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9511 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9512 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9513 saved_package_name
);
9516 sym
= new (&objfile
->objfile_obstack
) symbol
;
9517 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9518 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9519 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9520 e.g., "main" finds the "main" module and not C's main(). */
9521 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9522 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9523 SYMBOL_TYPE (sym
) = type
;
9525 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9529 /* Allocate a fully-qualified name consisting of the two parts on the
9533 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9535 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9538 /* A helper that allocates a variant part to attach to a Rust enum
9539 type. OBSTACK is where the results should be allocated. TYPE is
9540 the type we're processing. DISCRIMINANT_INDEX is the index of the
9541 discriminant. It must be the index of one of the fields of TYPE,
9542 or -1 to mean there is no discriminant (univariant enum).
9543 DEFAULT_INDEX is the index of the default field; or -1 if there is
9544 no default. RANGES is indexed by "effective" field number (the
9545 field index, but omitting the discriminant and default fields) and
9546 must hold the discriminant values used by the variants. Note that
9547 RANGES must have a lifetime at least as long as OBSTACK -- either
9548 already allocated on it, or static. */
9551 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9552 int discriminant_index
, int default_index
,
9553 gdb::array_view
<discriminant_range
> ranges
)
9555 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. */
9556 gdb_assert (discriminant_index
== -1
9557 || (discriminant_index
>= 0
9558 && discriminant_index
< type
->num_fields ()));
9559 gdb_assert (default_index
== -1
9560 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9562 /* We have one variant for each non-discriminant field. */
9563 int n_variants
= type
->num_fields ();
9564 if (discriminant_index
!= -1)
9567 variant
*variants
= new (obstack
) variant
[n_variants
];
9570 for (int i
= 0; i
< type
->num_fields (); ++i
)
9572 if (i
== discriminant_index
)
9575 variants
[var_idx
].first_field
= i
;
9576 variants
[var_idx
].last_field
= i
+ 1;
9578 /* The default field does not need a range, but other fields do.
9579 We skipped the discriminant above. */
9580 if (i
!= default_index
)
9582 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9589 gdb_assert (range_idx
== ranges
.size ());
9590 gdb_assert (var_idx
== n_variants
);
9592 variant_part
*part
= new (obstack
) variant_part
;
9593 part
->discriminant_index
= discriminant_index
;
9594 /* If there is no discriminant, then whether it is signed is of no
9597 = (discriminant_index
== -1
9599 : type
->field (discriminant_index
).type ()->is_unsigned ());
9600 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9602 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9603 gdb::array_view
<variant_part
> *prop_value
9604 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9606 struct dynamic_prop prop
;
9607 prop
.set_variant_parts (prop_value
);
9609 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9612 /* Some versions of rustc emitted enums in an unusual way.
9614 Ordinary enums were emitted as unions. The first element of each
9615 structure in the union was named "RUST$ENUM$DISR". This element
9616 held the discriminant.
9618 These versions of Rust also implemented the "non-zero"
9619 optimization. When the enum had two values, and one is empty and
9620 the other holds a pointer that cannot be zero, the pointer is used
9621 as the discriminant, with a zero value meaning the empty variant.
9622 Here, the union's first member is of the form
9623 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9624 where the fieldnos are the indices of the fields that should be
9625 traversed in order to find the field (which may be several fields deep)
9626 and the variantname is the name of the variant of the case when the
9629 This function recognizes whether TYPE is of one of these forms,
9630 and, if so, smashes it to be a variant type. */
9633 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9635 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9637 /* We don't need to deal with empty enums. */
9638 if (type
->num_fields () == 0)
9641 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9642 if (type
->num_fields () == 1
9643 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9645 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9647 /* Decode the field name to find the offset of the
9649 ULONGEST bit_offset
= 0;
9650 struct type
*field_type
= type
->field (0).type ();
9651 while (name
[0] >= '0' && name
[0] <= '9')
9654 unsigned long index
= strtoul (name
, &tail
, 10);
9657 || index
>= field_type
->num_fields ()
9658 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9659 != FIELD_LOC_KIND_BITPOS
))
9661 complaint (_("Could not parse Rust enum encoding string \"%s\""
9663 TYPE_FIELD_NAME (type
, 0),
9664 objfile_name (objfile
));
9669 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9670 field_type
= field_type
->field (index
).type ();
9673 /* Smash this type to be a structure type. We have to do this
9674 because the type has already been recorded. */
9675 type
->set_code (TYPE_CODE_STRUCT
);
9676 type
->set_num_fields (3);
9677 /* Save the field we care about. */
9678 struct field saved_field
= type
->field (0);
9680 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9682 /* Put the discriminant at index 0. */
9683 type
->field (0).set_type (field_type
);
9684 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9685 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9686 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9688 /* The order of fields doesn't really matter, so put the real
9689 field at index 1 and the data-less field at index 2. */
9690 type
->field (1) = saved_field
;
9691 TYPE_FIELD_NAME (type
, 1)
9692 = rust_last_path_segment (type
->field (1).type ()->name ());
9693 type
->field (1).type ()->set_name
9694 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9695 TYPE_FIELD_NAME (type
, 1)));
9697 const char *dataless_name
9698 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9700 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9702 type
->field (2).set_type (dataless_type
);
9703 /* NAME points into the original discriminant name, which
9704 already has the correct lifetime. */
9705 TYPE_FIELD_NAME (type
, 2) = name
;
9706 SET_FIELD_BITPOS (type
->field (2), 0);
9708 /* Indicate that this is a variant type. */
9709 static discriminant_range ranges
[1] = { { 0, 0 } };
9710 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9712 /* A union with a single anonymous field is probably an old-style
9714 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9716 /* Smash this type to be a structure type. We have to do this
9717 because the type has already been recorded. */
9718 type
->set_code (TYPE_CODE_STRUCT
);
9720 struct type
*field_type
= type
->field (0).type ();
9721 const char *variant_name
9722 = rust_last_path_segment (field_type
->name ());
9723 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9724 field_type
->set_name
9725 (rust_fully_qualify (&objfile
->objfile_obstack
,
9726 type
->name (), variant_name
));
9728 alloc_rust_variant (&objfile
->objfile_obstack
, type
, -1, 0, {});
9732 struct type
*disr_type
= nullptr;
9733 for (int i
= 0; i
< type
->num_fields (); ++i
)
9735 disr_type
= type
->field (i
).type ();
9737 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9739 /* All fields of a true enum will be structs. */
9742 else if (disr_type
->num_fields () == 0)
9744 /* Could be data-less variant, so keep going. */
9745 disr_type
= nullptr;
9747 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9748 "RUST$ENUM$DISR") != 0)
9750 /* Not a Rust enum. */
9760 /* If we got here without a discriminant, then it's probably
9762 if (disr_type
== nullptr)
9765 /* Smash this type to be a structure type. We have to do this
9766 because the type has already been recorded. */
9767 type
->set_code (TYPE_CODE_STRUCT
);
9769 /* Make space for the discriminant field. */
9770 struct field
*disr_field
= &disr_type
->field (0);
9772 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9773 * sizeof (struct field
)));
9774 memcpy (new_fields
+ 1, type
->fields (),
9775 type
->num_fields () * sizeof (struct field
));
9776 type
->set_fields (new_fields
);
9777 type
->set_num_fields (type
->num_fields () + 1);
9779 /* Install the discriminant at index 0 in the union. */
9780 type
->field (0) = *disr_field
;
9781 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9782 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9784 /* We need a way to find the correct discriminant given a
9785 variant name. For convenience we build a map here. */
9786 struct type
*enum_type
= disr_field
->type ();
9787 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9788 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9790 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9793 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9794 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9798 int n_fields
= type
->num_fields ();
9799 /* We don't need a range entry for the discriminant, but we do
9800 need one for every other field, as there is no default
9802 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9805 /* Skip the discriminant here. */
9806 for (int i
= 1; i
< n_fields
; ++i
)
9808 /* Find the final word in the name of this variant's type.
9809 That name can be used to look up the correct
9811 const char *variant_name
9812 = rust_last_path_segment (type
->field (i
).type ()->name ());
9814 auto iter
= discriminant_map
.find (variant_name
);
9815 if (iter
!= discriminant_map
.end ())
9817 ranges
[i
- 1].low
= iter
->second
;
9818 ranges
[i
- 1].high
= iter
->second
;
9821 /* In Rust, each element should have the size of the
9823 TYPE_LENGTH (type
->field (i
).type ()) = TYPE_LENGTH (type
);
9825 /* Remove the discriminant field, if it exists. */
9826 struct type
*sub_type
= type
->field (i
).type ();
9827 if (sub_type
->num_fields () > 0)
9829 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9830 sub_type
->set_fields (sub_type
->fields () + 1);
9832 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9834 (rust_fully_qualify (&objfile
->objfile_obstack
,
9835 type
->name (), variant_name
));
9838 /* Indicate that this is a variant type. */
9839 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, -1,
9840 gdb::array_view
<discriminant_range
> (ranges
,
9845 /* Rewrite some Rust unions to be structures with variants parts. */
9848 rust_union_quirks (struct dwarf2_cu
*cu
)
9850 gdb_assert (cu
->language
== language_rust
);
9851 for (type
*type_
: cu
->rust_unions
)
9852 quirk_rust_enum (type_
, cu
->per_objfile
->objfile
);
9853 /* We don't need this any more. */
9854 cu
->rust_unions
.clear ();
9859 type_unit_group_unshareable
*
9860 dwarf2_per_objfile::get_type_unit_group_unshareable (type_unit_group
*tu_group
)
9862 auto iter
= this->m_type_units
.find (tu_group
);
9863 if (iter
!= this->m_type_units
.end ())
9864 return iter
->second
.get ();
9866 type_unit_group_unshareable_up
uniq (new type_unit_group_unshareable
);
9867 type_unit_group_unshareable
*result
= uniq
.get ();
9868 this->m_type_units
[tu_group
] = std::move (uniq
);
9873 dwarf2_per_objfile::get_type_for_signatured_type
9874 (signatured_type
*sig_type
) const
9876 auto iter
= this->m_type_map
.find (sig_type
);
9877 if (iter
== this->m_type_map
.end ())
9880 return iter
->second
;
9883 void dwarf2_per_objfile::set_type_for_signatured_type
9884 (signatured_type
*sig_type
, struct type
*type
)
9886 gdb_assert (this->m_type_map
.find (sig_type
) == this->m_type_map
.end ());
9888 this->m_type_map
[sig_type
] = type
;
9891 /* A helper function for computing the list of all symbol tables
9892 included by PER_CU. */
9895 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9896 htab_t all_children
, htab_t all_type_symtabs
,
9897 dwarf2_per_cu_data
*per_cu
,
9898 dwarf2_per_objfile
*per_objfile
,
9899 struct compunit_symtab
*immediate_parent
)
9901 void **slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9904 /* This inclusion and its children have been processed. */
9910 /* Only add a CU if it has a symbol table. */
9911 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9914 /* If this is a type unit only add its symbol table if we haven't
9915 seen it yet (type unit per_cu's can share symtabs). */
9916 if (per_cu
->is_debug_types
)
9918 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9922 result
->push_back (cust
);
9923 if (cust
->user
== NULL
)
9924 cust
->user
= immediate_parent
;
9929 result
->push_back (cust
);
9930 if (cust
->user
== NULL
)
9931 cust
->user
= immediate_parent
;
9935 if (!per_cu
->imported_symtabs_empty ())
9936 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9938 recursively_compute_inclusions (result
, all_children
,
9939 all_type_symtabs
, ptr
, per_objfile
,
9944 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9948 compute_compunit_symtab_includes (dwarf2_per_cu_data
*per_cu
,
9949 dwarf2_per_objfile
*per_objfile
)
9951 gdb_assert (! per_cu
->is_debug_types
);
9953 if (!per_cu
->imported_symtabs_empty ())
9956 std::vector
<compunit_symtab
*> result_symtabs
;
9957 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9959 /* If we don't have a symtab, we can just skip this case. */
9963 htab_up
all_children (htab_create_alloc (1, htab_hash_pointer
,
9965 NULL
, xcalloc
, xfree
));
9966 htab_up
all_type_symtabs (htab_create_alloc (1, htab_hash_pointer
,
9968 NULL
, xcalloc
, xfree
));
9970 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9972 recursively_compute_inclusions (&result_symtabs
, all_children
.get (),
9973 all_type_symtabs
.get (), ptr
,
9977 /* Now we have a transitive closure of all the included symtabs. */
9978 len
= result_symtabs
.size ();
9980 = XOBNEWVEC (&per_objfile
->objfile
->objfile_obstack
,
9981 struct compunit_symtab
*, len
+ 1);
9982 memcpy (cust
->includes
, result_symtabs
.data (),
9983 len
* sizeof (compunit_symtab
*));
9984 cust
->includes
[len
] = NULL
;
9988 /* Compute the 'includes' field for the symtabs of all the CUs we just
9992 process_cu_includes (dwarf2_per_objfile
*per_objfile
)
9994 for (dwarf2_per_cu_data
*iter
: per_objfile
->per_bfd
->just_read_cus
)
9996 if (! iter
->is_debug_types
)
9997 compute_compunit_symtab_includes (iter
, per_objfile
);
10000 per_objfile
->per_bfd
->just_read_cus
.clear ();
10003 /* Generate full symbol information for CU, whose DIEs have
10004 already been loaded into memory. */
10007 process_full_comp_unit (dwarf2_cu
*cu
, enum language pretend_language
)
10009 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10010 struct objfile
*objfile
= per_objfile
->objfile
;
10011 struct gdbarch
*gdbarch
= objfile
->arch ();
10012 CORE_ADDR lowpc
, highpc
;
10013 struct compunit_symtab
*cust
;
10014 CORE_ADDR baseaddr
;
10015 struct block
*static_block
;
10018 baseaddr
= objfile
->text_section_offset ();
10020 /* Clear the list here in case something was left over. */
10021 cu
->method_list
.clear ();
10023 cu
->language
= pretend_language
;
10024 cu
->language_defn
= language_def (cu
->language
);
10026 dwarf2_find_base_address (cu
->dies
, cu
);
10028 /* Do line number decoding in read_file_scope () */
10029 process_die (cu
->dies
, cu
);
10031 /* For now fudge the Go package. */
10032 if (cu
->language
== language_go
)
10033 fixup_go_packaging (cu
);
10035 /* Now that we have processed all the DIEs in the CU, all the types
10036 should be complete, and it should now be safe to compute all of the
10038 compute_delayed_physnames (cu
);
10040 if (cu
->language
== language_rust
)
10041 rust_union_quirks (cu
);
10043 /* Some compilers don't define a DW_AT_high_pc attribute for the
10044 compilation unit. If the DW_AT_high_pc is missing, synthesize
10045 it, by scanning the DIE's below the compilation unit. */
10046 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10048 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10049 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10051 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10052 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10053 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10054 addrmap to help ensure it has an accurate map of pc values belonging to
10056 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10058 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10059 SECT_OFF_TEXT (objfile
),
10064 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10066 /* Set symtab language to language from DW_AT_language. If the
10067 compilation is from a C file generated by language preprocessors, do
10068 not set the language if it was already deduced by start_subfile. */
10069 if (!(cu
->language
== language_c
10070 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10071 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10073 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10074 produce DW_AT_location with location lists but it can be possibly
10075 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10076 there were bugs in prologue debug info, fixed later in GCC-4.5
10077 by "unwind info for epilogues" patch (which is not directly related).
10079 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10080 needed, it would be wrong due to missing DW_AT_producer there.
10082 Still one can confuse GDB by using non-standard GCC compilation
10083 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10085 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10086 cust
->locations_valid
= 1;
10088 if (gcc_4_minor
>= 5)
10089 cust
->epilogue_unwind_valid
= 1;
10091 cust
->call_site_htab
= cu
->call_site_htab
;
10094 per_objfile
->set_symtab (cu
->per_cu
, cust
);
10096 /* Push it for inclusion processing later. */
10097 per_objfile
->per_bfd
->just_read_cus
.push_back (cu
->per_cu
);
10099 /* Not needed any more. */
10100 cu
->reset_builder ();
10103 /* Generate full symbol information for type unit CU, whose DIEs have
10104 already been loaded into memory. */
10107 process_full_type_unit (dwarf2_cu
*cu
,
10108 enum language pretend_language
)
10110 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10111 struct objfile
*objfile
= per_objfile
->objfile
;
10112 struct compunit_symtab
*cust
;
10113 struct signatured_type
*sig_type
;
10115 gdb_assert (cu
->per_cu
->is_debug_types
);
10116 sig_type
= (struct signatured_type
*) cu
->per_cu
;
10118 /* Clear the list here in case something was left over. */
10119 cu
->method_list
.clear ();
10121 cu
->language
= pretend_language
;
10122 cu
->language_defn
= language_def (cu
->language
);
10124 /* The symbol tables are set up in read_type_unit_scope. */
10125 process_die (cu
->dies
, cu
);
10127 /* For now fudge the Go package. */
10128 if (cu
->language
== language_go
)
10129 fixup_go_packaging (cu
);
10131 /* Now that we have processed all the DIEs in the CU, all the types
10132 should be complete, and it should now be safe to compute all of the
10134 compute_delayed_physnames (cu
);
10136 if (cu
->language
== language_rust
)
10137 rust_union_quirks (cu
);
10139 /* TUs share symbol tables.
10140 If this is the first TU to use this symtab, complete the construction
10141 of it with end_expandable_symtab. Otherwise, complete the addition of
10142 this TU's symbols to the existing symtab. */
10143 type_unit_group_unshareable
*tug_unshare
=
10144 per_objfile
->get_type_unit_group_unshareable (sig_type
->type_unit_group
);
10145 if (tug_unshare
->compunit_symtab
== NULL
)
10147 buildsym_compunit
*builder
= cu
->get_builder ();
10148 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10149 tug_unshare
->compunit_symtab
= cust
;
10153 /* Set symtab language to language from DW_AT_language. If the
10154 compilation is from a C file generated by language preprocessors,
10155 do not set the language if it was already deduced by
10157 if (!(cu
->language
== language_c
10158 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10159 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10164 cu
->get_builder ()->augment_type_symtab ();
10165 cust
= tug_unshare
->compunit_symtab
;
10168 per_objfile
->set_symtab (cu
->per_cu
, cust
);
10170 /* Not needed any more. */
10171 cu
->reset_builder ();
10174 /* Process an imported unit DIE. */
10177 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10179 struct attribute
*attr
;
10181 /* For now we don't handle imported units in type units. */
10182 if (cu
->per_cu
->is_debug_types
)
10184 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10185 " supported in type units [in module %s]"),
10186 objfile_name (cu
->per_objfile
->objfile
));
10189 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10192 sect_offset sect_off
= attr
->get_ref_die_offset ();
10193 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10194 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10195 dwarf2_per_cu_data
*per_cu
10196 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, per_objfile
);
10198 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
10199 into another compilation unit, at root level. Regard this as a hint,
10201 if (die
->parent
&& die
->parent
->parent
== NULL
10202 && per_cu
->unit_type
== DW_UT_compile
10203 && per_cu
->lang
== language_cplus
)
10206 /* If necessary, add it to the queue and load its DIEs. */
10207 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
10208 load_full_comp_unit (per_cu
, per_objfile
, per_objfile
->get_cu (per_cu
),
10209 false, cu
->language
);
10211 cu
->per_cu
->imported_symtabs_push (per_cu
);
10215 /* RAII object that represents a process_die scope: i.e.,
10216 starts/finishes processing a DIE. */
10217 class process_die_scope
10220 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10221 : m_die (die
), m_cu (cu
)
10223 /* We should only be processing DIEs not already in process. */
10224 gdb_assert (!m_die
->in_process
);
10225 m_die
->in_process
= true;
10228 ~process_die_scope ()
10230 m_die
->in_process
= false;
10232 /* If we're done processing the DIE for the CU that owns the line
10233 header, we don't need the line header anymore. */
10234 if (m_cu
->line_header_die_owner
== m_die
)
10236 delete m_cu
->line_header
;
10237 m_cu
->line_header
= NULL
;
10238 m_cu
->line_header_die_owner
= NULL
;
10247 /* Process a die and its children. */
10250 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10252 process_die_scope
scope (die
, cu
);
10256 case DW_TAG_padding
:
10258 case DW_TAG_compile_unit
:
10259 case DW_TAG_partial_unit
:
10260 read_file_scope (die
, cu
);
10262 case DW_TAG_type_unit
:
10263 read_type_unit_scope (die
, cu
);
10265 case DW_TAG_subprogram
:
10266 /* Nested subprograms in Fortran get a prefix. */
10267 if (cu
->language
== language_fortran
10268 && die
->parent
!= NULL
10269 && die
->parent
->tag
== DW_TAG_subprogram
)
10270 cu
->processing_has_namespace_info
= true;
10271 /* Fall through. */
10272 case DW_TAG_inlined_subroutine
:
10273 read_func_scope (die
, cu
);
10275 case DW_TAG_lexical_block
:
10276 case DW_TAG_try_block
:
10277 case DW_TAG_catch_block
:
10278 read_lexical_block_scope (die
, cu
);
10280 case DW_TAG_call_site
:
10281 case DW_TAG_GNU_call_site
:
10282 read_call_site_scope (die
, cu
);
10284 case DW_TAG_class_type
:
10285 case DW_TAG_interface_type
:
10286 case DW_TAG_structure_type
:
10287 case DW_TAG_union_type
:
10288 process_structure_scope (die
, cu
);
10290 case DW_TAG_enumeration_type
:
10291 process_enumeration_scope (die
, cu
);
10294 /* These dies have a type, but processing them does not create
10295 a symbol or recurse to process the children. Therefore we can
10296 read them on-demand through read_type_die. */
10297 case DW_TAG_subroutine_type
:
10298 case DW_TAG_set_type
:
10299 case DW_TAG_pointer_type
:
10300 case DW_TAG_ptr_to_member_type
:
10301 case DW_TAG_reference_type
:
10302 case DW_TAG_rvalue_reference_type
:
10303 case DW_TAG_string_type
:
10306 case DW_TAG_array_type
:
10307 /* We only need to handle this case for Ada -- in other
10308 languages, it's normal for the compiler to emit a typedef
10310 if (cu
->language
!= language_ada
)
10313 case DW_TAG_base_type
:
10314 case DW_TAG_subrange_type
:
10315 case DW_TAG_typedef
:
10316 /* Add a typedef symbol for the type definition, if it has a
10318 new_symbol (die
, read_type_die (die
, cu
), cu
);
10320 case DW_TAG_common_block
:
10321 read_common_block (die
, cu
);
10323 case DW_TAG_common_inclusion
:
10325 case DW_TAG_namespace
:
10326 cu
->processing_has_namespace_info
= true;
10327 read_namespace (die
, cu
);
10329 case DW_TAG_module
:
10330 cu
->processing_has_namespace_info
= true;
10331 read_module (die
, cu
);
10333 case DW_TAG_imported_declaration
:
10334 cu
->processing_has_namespace_info
= true;
10335 if (read_namespace_alias (die
, cu
))
10337 /* The declaration is not a global namespace alias. */
10338 /* Fall through. */
10339 case DW_TAG_imported_module
:
10340 cu
->processing_has_namespace_info
= true;
10341 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10342 || cu
->language
!= language_fortran
))
10343 complaint (_("Tag '%s' has unexpected children"),
10344 dwarf_tag_name (die
->tag
));
10345 read_import_statement (die
, cu
);
10348 case DW_TAG_imported_unit
:
10349 process_imported_unit_die (die
, cu
);
10352 case DW_TAG_variable
:
10353 read_variable (die
, cu
);
10357 new_symbol (die
, NULL
, cu
);
10362 /* DWARF name computation. */
10364 /* A helper function for dwarf2_compute_name which determines whether DIE
10365 needs to have the name of the scope prepended to the name listed in the
10369 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10371 struct attribute
*attr
;
10375 case DW_TAG_namespace
:
10376 case DW_TAG_typedef
:
10377 case DW_TAG_class_type
:
10378 case DW_TAG_interface_type
:
10379 case DW_TAG_structure_type
:
10380 case DW_TAG_union_type
:
10381 case DW_TAG_enumeration_type
:
10382 case DW_TAG_enumerator
:
10383 case DW_TAG_subprogram
:
10384 case DW_TAG_inlined_subroutine
:
10385 case DW_TAG_member
:
10386 case DW_TAG_imported_declaration
:
10389 case DW_TAG_variable
:
10390 case DW_TAG_constant
:
10391 /* We only need to prefix "globally" visible variables. These include
10392 any variable marked with DW_AT_external or any variable that
10393 lives in a namespace. [Variables in anonymous namespaces
10394 require prefixing, but they are not DW_AT_external.] */
10396 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10398 struct dwarf2_cu
*spec_cu
= cu
;
10400 return die_needs_namespace (die_specification (die
, &spec_cu
),
10404 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10405 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10406 && die
->parent
->tag
!= DW_TAG_module
)
10408 /* A variable in a lexical block of some kind does not need a
10409 namespace, even though in C++ such variables may be external
10410 and have a mangled name. */
10411 if (die
->parent
->tag
== DW_TAG_lexical_block
10412 || die
->parent
->tag
== DW_TAG_try_block
10413 || die
->parent
->tag
== DW_TAG_catch_block
10414 || die
->parent
->tag
== DW_TAG_subprogram
)
10423 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10424 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10425 defined for the given DIE. */
10427 static struct attribute
*
10428 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10430 struct attribute
*attr
;
10432 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10434 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10439 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10440 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10441 defined for the given DIE. */
10443 static const char *
10444 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10446 const char *linkage_name
;
10448 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10449 if (linkage_name
== NULL
)
10450 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10452 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10453 See https://github.com/rust-lang/rust/issues/32925. */
10454 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10455 && strchr (linkage_name
, '{') != NULL
)
10456 linkage_name
= NULL
;
10458 return linkage_name
;
10461 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10462 compute the physname for the object, which include a method's:
10463 - formal parameters (C++),
10464 - receiver type (Go),
10466 The term "physname" is a bit confusing.
10467 For C++, for example, it is the demangled name.
10468 For Go, for example, it's the mangled name.
10470 For Ada, return the DIE's linkage name rather than the fully qualified
10471 name. PHYSNAME is ignored..
10473 The result is allocated on the objfile->per_bfd's obstack and
10476 static const char *
10477 dwarf2_compute_name (const char *name
,
10478 struct die_info
*die
, struct dwarf2_cu
*cu
,
10481 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10484 name
= dwarf2_name (die
, cu
);
10486 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10487 but otherwise compute it by typename_concat inside GDB.
10488 FIXME: Actually this is not really true, or at least not always true.
10489 It's all very confusing. compute_and_set_names doesn't try to demangle
10490 Fortran names because there is no mangling standard. So new_symbol
10491 will set the demangled name to the result of dwarf2_full_name, and it is
10492 the demangled name that GDB uses if it exists. */
10493 if (cu
->language
== language_ada
10494 || (cu
->language
== language_fortran
&& physname
))
10496 /* For Ada unit, we prefer the linkage name over the name, as
10497 the former contains the exported name, which the user expects
10498 to be able to reference. Ideally, we want the user to be able
10499 to reference this entity using either natural or linkage name,
10500 but we haven't started looking at this enhancement yet. */
10501 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10503 if (linkage_name
!= NULL
)
10504 return linkage_name
;
10507 /* These are the only languages we know how to qualify names in. */
10509 && (cu
->language
== language_cplus
10510 || cu
->language
== language_fortran
|| cu
->language
== language_d
10511 || cu
->language
== language_rust
))
10513 if (die_needs_namespace (die
, cu
))
10515 const char *prefix
;
10516 const char *canonical_name
= NULL
;
10520 prefix
= determine_prefix (die
, cu
);
10521 if (*prefix
!= '\0')
10523 gdb::unique_xmalloc_ptr
<char> prefixed_name
10524 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10526 buf
.puts (prefixed_name
.get ());
10531 /* Template parameters may be specified in the DIE's DW_AT_name, or
10532 as children with DW_TAG_template_type_param or
10533 DW_TAG_value_type_param. If the latter, add them to the name
10534 here. If the name already has template parameters, then
10535 skip this step; some versions of GCC emit both, and
10536 it is more efficient to use the pre-computed name.
10538 Something to keep in mind about this process: it is very
10539 unlikely, or in some cases downright impossible, to produce
10540 something that will match the mangled name of a function.
10541 If the definition of the function has the same debug info,
10542 we should be able to match up with it anyway. But fallbacks
10543 using the minimal symbol, for instance to find a method
10544 implemented in a stripped copy of libstdc++, will not work.
10545 If we do not have debug info for the definition, we will have to
10546 match them up some other way.
10548 When we do name matching there is a related problem with function
10549 templates; two instantiated function templates are allowed to
10550 differ only by their return types, which we do not add here. */
10552 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10554 struct attribute
*attr
;
10555 struct die_info
*child
;
10557 const language_defn
*cplus_lang
= language_def (cu
->language
);
10559 die
->building_fullname
= 1;
10561 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10565 const gdb_byte
*bytes
;
10566 struct dwarf2_locexpr_baton
*baton
;
10569 if (child
->tag
!= DW_TAG_template_type_param
10570 && child
->tag
!= DW_TAG_template_value_param
)
10581 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10584 complaint (_("template parameter missing DW_AT_type"));
10585 buf
.puts ("UNKNOWN_TYPE");
10588 type
= die_type (child
, cu
);
10590 if (child
->tag
== DW_TAG_template_type_param
)
10592 cplus_lang
->print_type (type
, "", &buf
, -1, 0,
10593 &type_print_raw_options
);
10597 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10600 complaint (_("template parameter missing "
10601 "DW_AT_const_value"));
10602 buf
.puts ("UNKNOWN_VALUE");
10606 dwarf2_const_value_attr (attr
, type
, name
,
10607 &cu
->comp_unit_obstack
, cu
,
10608 &value
, &bytes
, &baton
);
10610 if (type
->has_no_signedness ())
10611 /* GDB prints characters as NUMBER 'CHAR'. If that's
10612 changed, this can use value_print instead. */
10613 cplus_lang
->printchar (value
, type
, &buf
);
10616 struct value_print_options opts
;
10619 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10623 baton
->per_objfile
);
10624 else if (bytes
!= NULL
)
10626 v
= allocate_value (type
);
10627 memcpy (value_contents_writeable (v
), bytes
,
10628 TYPE_LENGTH (type
));
10631 v
= value_from_longest (type
, value
);
10633 /* Specify decimal so that we do not depend on
10635 get_formatted_print_options (&opts
, 'd');
10637 value_print (v
, &buf
, &opts
);
10642 die
->building_fullname
= 0;
10646 /* Close the argument list, with a space if necessary
10647 (nested templates). */
10648 if (!buf
.empty () && buf
.string ().back () == '>')
10655 /* For C++ methods, append formal parameter type
10656 information, if PHYSNAME. */
10658 if (physname
&& die
->tag
== DW_TAG_subprogram
10659 && cu
->language
== language_cplus
)
10661 struct type
*type
= read_type_die (die
, cu
);
10663 c_type_print_args (type
, &buf
, 1, cu
->language
,
10664 &type_print_raw_options
);
10666 if (cu
->language
== language_cplus
)
10668 /* Assume that an artificial first parameter is
10669 "this", but do not crash if it is not. RealView
10670 marks unnamed (and thus unused) parameters as
10671 artificial; there is no way to differentiate
10673 if (type
->num_fields () > 0
10674 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10675 && type
->field (0).type ()->code () == TYPE_CODE_PTR
10676 && TYPE_CONST (TYPE_TARGET_TYPE (type
->field (0).type ())))
10677 buf
.puts (" const");
10681 const std::string
&intermediate_name
= buf
.string ();
10683 if (cu
->language
== language_cplus
)
10685 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10688 /* If we only computed INTERMEDIATE_NAME, or if
10689 INTERMEDIATE_NAME is already canonical, then we need to
10691 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10692 name
= objfile
->intern (intermediate_name
);
10694 name
= canonical_name
;
10701 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10702 If scope qualifiers are appropriate they will be added. The result
10703 will be allocated on the storage_obstack, or NULL if the DIE does
10704 not have a name. NAME may either be from a previous call to
10705 dwarf2_name or NULL.
10707 The output string will be canonicalized (if C++). */
10709 static const char *
10710 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10712 return dwarf2_compute_name (name
, die
, cu
, 0);
10715 /* Construct a physname for the given DIE in CU. NAME may either be
10716 from a previous call to dwarf2_name or NULL. The result will be
10717 allocated on the objfile_objstack or NULL if the DIE does not have a
10720 The output string will be canonicalized (if C++). */
10722 static const char *
10723 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10725 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10726 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10729 /* In this case dwarf2_compute_name is just a shortcut not building anything
10731 if (!die_needs_namespace (die
, cu
))
10732 return dwarf2_compute_name (name
, die
, cu
, 1);
10734 if (cu
->language
!= language_rust
)
10735 mangled
= dw2_linkage_name (die
, cu
);
10737 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10739 gdb::unique_xmalloc_ptr
<char> demangled
;
10740 if (mangled
!= NULL
)
10743 if (language_def (cu
->language
)->store_sym_names_in_linkage_form_p ())
10745 /* Do nothing (do not demangle the symbol name). */
10749 /* Use DMGL_RET_DROP for C++ template functions to suppress
10750 their return type. It is easier for GDB users to search
10751 for such functions as `name(params)' than `long name(params)'.
10752 In such case the minimal symbol names do not match the full
10753 symbol names but for template functions there is never a need
10754 to look up their definition from their declaration so
10755 the only disadvantage remains the minimal symbol variant
10756 `long name(params)' does not have the proper inferior type. */
10757 demangled
.reset (gdb_demangle (mangled
,
10758 (DMGL_PARAMS
| DMGL_ANSI
10759 | DMGL_RET_DROP
)));
10762 canon
= demangled
.get ();
10770 if (canon
== NULL
|| check_physname
)
10772 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10774 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10776 /* It may not mean a bug in GDB. The compiler could also
10777 compute DW_AT_linkage_name incorrectly. But in such case
10778 GDB would need to be bug-to-bug compatible. */
10780 complaint (_("Computed physname <%s> does not match demangled <%s> "
10781 "(from linkage <%s>) - DIE at %s [in module %s]"),
10782 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10783 objfile_name (objfile
));
10785 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10786 is available here - over computed PHYSNAME. It is safer
10787 against both buggy GDB and buggy compilers. */
10801 retval
= objfile
->intern (retval
);
10806 /* Inspect DIE in CU for a namespace alias. If one exists, record
10807 a new symbol for it.
10809 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10812 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10814 struct attribute
*attr
;
10816 /* If the die does not have a name, this is not a namespace
10818 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10822 struct die_info
*d
= die
;
10823 struct dwarf2_cu
*imported_cu
= cu
;
10825 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10826 keep inspecting DIEs until we hit the underlying import. */
10827 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10828 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10830 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10834 d
= follow_die_ref (d
, attr
, &imported_cu
);
10835 if (d
->tag
!= DW_TAG_imported_declaration
)
10839 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10841 complaint (_("DIE at %s has too many recursively imported "
10842 "declarations"), sect_offset_str (d
->sect_off
));
10849 sect_offset sect_off
= attr
->get_ref_die_offset ();
10851 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, cu
->per_objfile
);
10852 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10854 /* This declaration is a global namespace alias. Add
10855 a symbol for it whose type is the aliased namespace. */
10856 new_symbol (die
, type
, cu
);
10865 /* Return the using directives repository (global or local?) to use in the
10866 current context for CU.
10868 For Ada, imported declarations can materialize renamings, which *may* be
10869 global. However it is impossible (for now?) in DWARF to distinguish
10870 "external" imported declarations and "static" ones. As all imported
10871 declarations seem to be static in all other languages, make them all CU-wide
10872 global only in Ada. */
10874 static struct using_direct
**
10875 using_directives (struct dwarf2_cu
*cu
)
10877 if (cu
->language
== language_ada
10878 && cu
->get_builder ()->outermost_context_p ())
10879 return cu
->get_builder ()->get_global_using_directives ();
10881 return cu
->get_builder ()->get_local_using_directives ();
10884 /* Read the import statement specified by the given die and record it. */
10887 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10889 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10890 struct attribute
*import_attr
;
10891 struct die_info
*imported_die
, *child_die
;
10892 struct dwarf2_cu
*imported_cu
;
10893 const char *imported_name
;
10894 const char *imported_name_prefix
;
10895 const char *canonical_name
;
10896 const char *import_alias
;
10897 const char *imported_declaration
= NULL
;
10898 const char *import_prefix
;
10899 std::vector
<const char *> excludes
;
10901 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10902 if (import_attr
== NULL
)
10904 complaint (_("Tag '%s' has no DW_AT_import"),
10905 dwarf_tag_name (die
->tag
));
10910 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10911 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10912 if (imported_name
== NULL
)
10914 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10916 The import in the following code:
10930 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10931 <52> DW_AT_decl_file : 1
10932 <53> DW_AT_decl_line : 6
10933 <54> DW_AT_import : <0x75>
10934 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10935 <59> DW_AT_name : B
10936 <5b> DW_AT_decl_file : 1
10937 <5c> DW_AT_decl_line : 2
10938 <5d> DW_AT_type : <0x6e>
10940 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10941 <76> DW_AT_byte_size : 4
10942 <77> DW_AT_encoding : 5 (signed)
10944 imports the wrong die ( 0x75 instead of 0x58 ).
10945 This case will be ignored until the gcc bug is fixed. */
10949 /* Figure out the local name after import. */
10950 import_alias
= dwarf2_name (die
, cu
);
10952 /* Figure out where the statement is being imported to. */
10953 import_prefix
= determine_prefix (die
, cu
);
10955 /* Figure out what the scope of the imported die is and prepend it
10956 to the name of the imported die. */
10957 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10959 if (imported_die
->tag
!= DW_TAG_namespace
10960 && imported_die
->tag
!= DW_TAG_module
)
10962 imported_declaration
= imported_name
;
10963 canonical_name
= imported_name_prefix
;
10965 else if (strlen (imported_name_prefix
) > 0)
10966 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10967 imported_name_prefix
,
10968 (cu
->language
== language_d
? "." : "::"),
10969 imported_name
, (char *) NULL
);
10971 canonical_name
= imported_name
;
10973 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10974 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10975 child_die
= child_die
->sibling
)
10977 /* DWARF-4: A Fortran use statement with a “rename list” may be
10978 represented by an imported module entry with an import attribute
10979 referring to the module and owned entries corresponding to those
10980 entities that are renamed as part of being imported. */
10982 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10984 complaint (_("child DW_TAG_imported_declaration expected "
10985 "- DIE at %s [in module %s]"),
10986 sect_offset_str (child_die
->sect_off
),
10987 objfile_name (objfile
));
10991 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10992 if (import_attr
== NULL
)
10994 complaint (_("Tag '%s' has no DW_AT_import"),
10995 dwarf_tag_name (child_die
->tag
));
11000 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11002 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11003 if (imported_name
== NULL
)
11005 complaint (_("child DW_TAG_imported_declaration has unknown "
11006 "imported name - DIE at %s [in module %s]"),
11007 sect_offset_str (child_die
->sect_off
),
11008 objfile_name (objfile
));
11012 excludes
.push_back (imported_name
);
11014 process_die (child_die
, cu
);
11017 add_using_directive (using_directives (cu
),
11021 imported_declaration
,
11024 &objfile
->objfile_obstack
);
11027 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11028 types, but gives them a size of zero. Starting with version 14,
11029 ICC is compatible with GCC. */
11032 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11034 if (!cu
->checked_producer
)
11035 check_producer (cu
);
11037 return cu
->producer_is_icc_lt_14
;
11040 /* ICC generates a DW_AT_type for C void functions. This was observed on
11041 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11042 which says that void functions should not have a DW_AT_type. */
11045 producer_is_icc (struct dwarf2_cu
*cu
)
11047 if (!cu
->checked_producer
)
11048 check_producer (cu
);
11050 return cu
->producer_is_icc
;
11053 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11054 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11055 this, it was first present in GCC release 4.3.0. */
11058 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11060 if (!cu
->checked_producer
)
11061 check_producer (cu
);
11063 return cu
->producer_is_gcc_lt_4_3
;
11066 static file_and_directory
11067 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11069 file_and_directory res
;
11071 /* Find the filename. Do not use dwarf2_name here, since the filename
11072 is not a source language identifier. */
11073 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11074 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11076 if (res
.comp_dir
== NULL
11077 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11078 && IS_ABSOLUTE_PATH (res
.name
))
11080 res
.comp_dir_storage
= ldirname (res
.name
);
11081 if (!res
.comp_dir_storage
.empty ())
11082 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11084 if (res
.comp_dir
!= NULL
)
11086 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11087 directory, get rid of it. */
11088 const char *cp
= strchr (res
.comp_dir
, ':');
11090 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11091 res
.comp_dir
= cp
+ 1;
11094 if (res
.name
== NULL
)
11095 res
.name
= "<unknown>";
11100 /* Handle DW_AT_stmt_list for a compilation unit.
11101 DIE is the DW_TAG_compile_unit die for CU.
11102 COMP_DIR is the compilation directory. LOWPC is passed to
11103 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11106 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11107 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11109 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
11110 struct attribute
*attr
;
11111 struct line_header line_header_local
;
11112 hashval_t line_header_local_hash
;
11114 int decode_mapping
;
11116 gdb_assert (! cu
->per_cu
->is_debug_types
);
11118 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11119 if (attr
== NULL
|| !attr
->form_is_unsigned ())
11122 sect_offset line_offset
= (sect_offset
) attr
->as_unsigned ();
11124 /* The line header hash table is only created if needed (it exists to
11125 prevent redundant reading of the line table for partial_units).
11126 If we're given a partial_unit, we'll need it. If we're given a
11127 compile_unit, then use the line header hash table if it's already
11128 created, but don't create one just yet. */
11130 if (per_objfile
->line_header_hash
== NULL
11131 && die
->tag
== DW_TAG_partial_unit
)
11133 per_objfile
->line_header_hash
11134 .reset (htab_create_alloc (127, line_header_hash_voidp
,
11135 line_header_eq_voidp
,
11136 free_line_header_voidp
,
11140 line_header_local
.sect_off
= line_offset
;
11141 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11142 line_header_local_hash
= line_header_hash (&line_header_local
);
11143 if (per_objfile
->line_header_hash
!= NULL
)
11145 slot
= htab_find_slot_with_hash (per_objfile
->line_header_hash
.get (),
11146 &line_header_local
,
11147 line_header_local_hash
, NO_INSERT
);
11149 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11150 is not present in *SLOT (since if there is something in *SLOT then
11151 it will be for a partial_unit). */
11152 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11154 gdb_assert (*slot
!= NULL
);
11155 cu
->line_header
= (struct line_header
*) *slot
;
11160 /* dwarf_decode_line_header does not yet provide sufficient information.
11161 We always have to call also dwarf_decode_lines for it. */
11162 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11166 cu
->line_header
= lh
.release ();
11167 cu
->line_header_die_owner
= die
;
11169 if (per_objfile
->line_header_hash
== NULL
)
11173 slot
= htab_find_slot_with_hash (per_objfile
->line_header_hash
.get (),
11174 &line_header_local
,
11175 line_header_local_hash
, INSERT
);
11176 gdb_assert (slot
!= NULL
);
11178 if (slot
!= NULL
&& *slot
== NULL
)
11180 /* This newly decoded line number information unit will be owned
11181 by line_header_hash hash table. */
11182 *slot
= cu
->line_header
;
11183 cu
->line_header_die_owner
= NULL
;
11187 /* We cannot free any current entry in (*slot) as that struct line_header
11188 may be already used by multiple CUs. Create only temporary decoded
11189 line_header for this CU - it may happen at most once for each line
11190 number information unit. And if we're not using line_header_hash
11191 then this is what we want as well. */
11192 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11194 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11195 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11200 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11203 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11205 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
11206 struct objfile
*objfile
= per_objfile
->objfile
;
11207 struct gdbarch
*gdbarch
= objfile
->arch ();
11208 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11209 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11210 struct attribute
*attr
;
11211 struct die_info
*child_die
;
11212 CORE_ADDR baseaddr
;
11214 prepare_one_comp_unit (cu
, die
, cu
->language
);
11215 baseaddr
= objfile
->text_section_offset ();
11217 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11219 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11220 from finish_block. */
11221 if (lowpc
== ((CORE_ADDR
) -1))
11223 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11225 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11227 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11228 standardised yet. As a workaround for the language detection we fall
11229 back to the DW_AT_producer string. */
11230 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11231 cu
->language
= language_opencl
;
11233 /* Similar hack for Go. */
11234 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11235 set_cu_language (DW_LANG_Go
, cu
);
11237 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11239 /* Decode line number information if present. We do this before
11240 processing child DIEs, so that the line header table is available
11241 for DW_AT_decl_file. */
11242 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11244 /* Process all dies in compilation unit. */
11245 if (die
->child
!= NULL
)
11247 child_die
= die
->child
;
11248 while (child_die
&& child_die
->tag
)
11250 process_die (child_die
, cu
);
11251 child_die
= child_die
->sibling
;
11255 /* Decode macro information, if present. Dwarf 2 macro information
11256 refers to information in the line number info statement program
11257 header, so we can only read it if we've read the header
11259 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11261 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11262 if (attr
!= nullptr && attr
->form_is_unsigned () && cu
->line_header
)
11264 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11265 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11267 dwarf_decode_macros (cu
, attr
->as_unsigned (), 1);
11271 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11272 if (attr
!= nullptr && attr
->form_is_unsigned () && cu
->line_header
)
11274 unsigned int macro_offset
= attr
->as_unsigned ();
11276 dwarf_decode_macros (cu
, macro_offset
, 0);
11282 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11284 struct type_unit_group
*tu_group
;
11286 struct attribute
*attr
;
11288 struct signatured_type
*sig_type
;
11290 gdb_assert (per_cu
->is_debug_types
);
11291 sig_type
= (struct signatured_type
*) per_cu
;
11293 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11295 /* If we're using .gdb_index (includes -readnow) then
11296 per_cu->type_unit_group may not have been set up yet. */
11297 if (sig_type
->type_unit_group
== NULL
)
11298 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11299 tu_group
= sig_type
->type_unit_group
;
11301 /* If we've already processed this stmt_list there's no real need to
11302 do it again, we could fake it and just recreate the part we need
11303 (file name,index -> symtab mapping). If data shows this optimization
11304 is useful we can do it then. */
11305 type_unit_group_unshareable
*tug_unshare
11306 = per_objfile
->get_type_unit_group_unshareable (tu_group
);
11307 first_time
= tug_unshare
->compunit_symtab
== NULL
;
11309 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11312 if (attr
!= NULL
&& attr
->form_is_unsigned ())
11314 sect_offset line_offset
= (sect_offset
) attr
->as_unsigned ();
11315 lh
= dwarf_decode_line_header (line_offset
, this);
11320 start_symtab ("", NULL
, 0);
11323 gdb_assert (tug_unshare
->symtabs
== NULL
);
11324 gdb_assert (m_builder
== nullptr);
11325 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11326 m_builder
.reset (new struct buildsym_compunit
11327 (COMPUNIT_OBJFILE (cust
), "",
11328 COMPUNIT_DIRNAME (cust
),
11329 compunit_language (cust
),
11331 list_in_scope
= get_builder ()->get_file_symbols ();
11336 line_header
= lh
.release ();
11337 line_header_die_owner
= die
;
11341 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11343 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11344 still initializing it, and our caller (a few levels up)
11345 process_full_type_unit still needs to know if this is the first
11348 tug_unshare
->symtabs
11349 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11350 struct symtab
*, line_header
->file_names_size ());
11352 auto &file_names
= line_header
->file_names ();
11353 for (i
= 0; i
< file_names
.size (); ++i
)
11355 file_entry
&fe
= file_names
[i
];
11356 dwarf2_start_subfile (this, fe
.name
,
11357 fe
.include_dir (line_header
));
11358 buildsym_compunit
*b
= get_builder ();
11359 if (b
->get_current_subfile ()->symtab
== NULL
)
11361 /* NOTE: start_subfile will recognize when it's been
11362 passed a file it has already seen. So we can't
11363 assume there's a simple mapping from
11364 cu->line_header->file_names to subfiles, plus
11365 cu->line_header->file_names may contain dups. */
11366 b
->get_current_subfile ()->symtab
11367 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11370 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11371 tug_unshare
->symtabs
[i
] = fe
.symtab
;
11376 gdb_assert (m_builder
== nullptr);
11377 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11378 m_builder
.reset (new struct buildsym_compunit
11379 (COMPUNIT_OBJFILE (cust
), "",
11380 COMPUNIT_DIRNAME (cust
),
11381 compunit_language (cust
),
11383 list_in_scope
= get_builder ()->get_file_symbols ();
11385 auto &file_names
= line_header
->file_names ();
11386 for (i
= 0; i
< file_names
.size (); ++i
)
11388 file_entry
&fe
= file_names
[i
];
11389 fe
.symtab
= tug_unshare
->symtabs
[i
];
11393 /* The main symtab is allocated last. Type units don't have DW_AT_name
11394 so they don't have a "real" (so to speak) symtab anyway.
11395 There is later code that will assign the main symtab to all symbols
11396 that don't have one. We need to handle the case of a symbol with a
11397 missing symtab (DW_AT_decl_file) anyway. */
11400 /* Process DW_TAG_type_unit.
11401 For TUs we want to skip the first top level sibling if it's not the
11402 actual type being defined by this TU. In this case the first top
11403 level sibling is there to provide context only. */
11406 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11408 struct die_info
*child_die
;
11410 prepare_one_comp_unit (cu
, die
, language_minimal
);
11412 /* Initialize (or reinitialize) the machinery for building symtabs.
11413 We do this before processing child DIEs, so that the line header table
11414 is available for DW_AT_decl_file. */
11415 cu
->setup_type_unit_groups (die
);
11417 if (die
->child
!= NULL
)
11419 child_die
= die
->child
;
11420 while (child_die
&& child_die
->tag
)
11422 process_die (child_die
, cu
);
11423 child_die
= child_die
->sibling
;
11430 http://gcc.gnu.org/wiki/DebugFission
11431 http://gcc.gnu.org/wiki/DebugFissionDWP
11433 To simplify handling of both DWO files ("object" files with the DWARF info)
11434 and DWP files (a file with the DWOs packaged up into one file), we treat
11435 DWP files as having a collection of virtual DWO files. */
11438 hash_dwo_file (const void *item
)
11440 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11443 hash
= htab_hash_string (dwo_file
->dwo_name
);
11444 if (dwo_file
->comp_dir
!= NULL
)
11445 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11450 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11452 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11453 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11455 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11457 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11458 return lhs
->comp_dir
== rhs
->comp_dir
;
11459 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11462 /* Allocate a hash table for DWO files. */
11465 allocate_dwo_file_hash_table ()
11467 auto delete_dwo_file
= [] (void *item
)
11469 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11474 return htab_up (htab_create_alloc (41,
11481 /* Lookup DWO file DWO_NAME. */
11484 lookup_dwo_file_slot (dwarf2_per_objfile
*per_objfile
,
11485 const char *dwo_name
,
11486 const char *comp_dir
)
11488 struct dwo_file find_entry
;
11491 if (per_objfile
->per_bfd
->dwo_files
== NULL
)
11492 per_objfile
->per_bfd
->dwo_files
= allocate_dwo_file_hash_table ();
11494 find_entry
.dwo_name
= dwo_name
;
11495 find_entry
.comp_dir
= comp_dir
;
11496 slot
= htab_find_slot (per_objfile
->per_bfd
->dwo_files
.get (), &find_entry
,
11503 hash_dwo_unit (const void *item
)
11505 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11507 /* This drops the top 32 bits of the id, but is ok for a hash. */
11508 return dwo_unit
->signature
;
11512 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11514 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11515 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11517 /* The signature is assumed to be unique within the DWO file.
11518 So while object file CU dwo_id's always have the value zero,
11519 that's OK, assuming each object file DWO file has only one CU,
11520 and that's the rule for now. */
11521 return lhs
->signature
== rhs
->signature
;
11524 /* Allocate a hash table for DWO CUs,TUs.
11525 There is one of these tables for each of CUs,TUs for each DWO file. */
11528 allocate_dwo_unit_table ()
11530 /* Start out with a pretty small number.
11531 Generally DWO files contain only one CU and maybe some TUs. */
11532 return htab_up (htab_create_alloc (3,
11535 NULL
, xcalloc
, xfree
));
11538 /* die_reader_func for create_dwo_cu. */
11541 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11542 const gdb_byte
*info_ptr
,
11543 struct die_info
*comp_unit_die
,
11544 struct dwo_file
*dwo_file
,
11545 struct dwo_unit
*dwo_unit
)
11547 struct dwarf2_cu
*cu
= reader
->cu
;
11548 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11549 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11551 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11552 if (!signature
.has_value ())
11554 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11555 " its dwo_id [in module %s]"),
11556 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11560 dwo_unit
->dwo_file
= dwo_file
;
11561 dwo_unit
->signature
= *signature
;
11562 dwo_unit
->section
= section
;
11563 dwo_unit
->sect_off
= sect_off
;
11564 dwo_unit
->length
= cu
->per_cu
->length
;
11566 dwarf_read_debug_printf (" offset %s, dwo_id %s",
11567 sect_offset_str (sect_off
),
11568 hex_string (dwo_unit
->signature
));
11571 /* Create the dwo_units for the CUs in a DWO_FILE.
11572 Note: This function processes DWO files only, not DWP files. */
11575 create_cus_hash_table (dwarf2_per_objfile
*per_objfile
,
11576 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11577 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11579 struct objfile
*objfile
= per_objfile
->objfile
;
11580 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
11581 const gdb_byte
*info_ptr
, *end_ptr
;
11583 section
.read (objfile
);
11584 info_ptr
= section
.buffer
;
11586 if (info_ptr
== NULL
)
11589 dwarf_read_debug_printf ("Reading %s for %s:",
11590 section
.get_name (),
11591 section
.get_file_name ());
11593 end_ptr
= info_ptr
+ section
.size
;
11594 while (info_ptr
< end_ptr
)
11596 struct dwarf2_per_cu_data per_cu
;
11597 struct dwo_unit read_unit
{};
11598 struct dwo_unit
*dwo_unit
;
11600 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11602 memset (&per_cu
, 0, sizeof (per_cu
));
11603 per_cu
.per_bfd
= per_bfd
;
11604 per_cu
.is_debug_types
= 0;
11605 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11606 per_cu
.section
= §ion
;
11608 cutu_reader
reader (&per_cu
, per_objfile
, cu
, &dwo_file
);
11609 if (!reader
.dummy_p
)
11610 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11611 &dwo_file
, &read_unit
);
11612 info_ptr
+= per_cu
.length
;
11614 // If the unit could not be parsed, skip it.
11615 if (read_unit
.dwo_file
== NULL
)
11618 if (cus_htab
== NULL
)
11619 cus_htab
= allocate_dwo_unit_table ();
11621 dwo_unit
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
11623 *dwo_unit
= read_unit
;
11624 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11625 gdb_assert (slot
!= NULL
);
11628 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11629 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11631 complaint (_("debug cu entry at offset %s is duplicate to"
11632 " the entry at offset %s, signature %s"),
11633 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11634 hex_string (dwo_unit
->signature
));
11636 *slot
= (void *)dwo_unit
;
11640 /* DWP file .debug_{cu,tu}_index section format:
11641 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11642 [ref: http://dwarfstd.org/doc/DWARF5.pdf, sect 7.3.5 "DWARF Package Files"]
11644 DWP Versions 1 & 2 are older, pre-standard format versions. The first
11645 officially standard DWP format was published with DWARF v5 and is called
11646 Version 5. There are no versions 3 or 4.
11650 Both index sections have the same format, and serve to map a 64-bit
11651 signature to a set of section numbers. Each section begins with a header,
11652 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11653 indexes, and a pool of 32-bit section numbers. The index sections will be
11654 aligned at 8-byte boundaries in the file.
11656 The index section header consists of:
11658 V, 32 bit version number
11660 N, 32 bit number of compilation units or type units in the index
11661 M, 32 bit number of slots in the hash table
11663 Numbers are recorded using the byte order of the application binary.
11665 The hash table begins at offset 16 in the section, and consists of an array
11666 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11667 order of the application binary). Unused slots in the hash table are 0.
11668 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11670 The parallel table begins immediately after the hash table
11671 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11672 array of 32-bit indexes (using the byte order of the application binary),
11673 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11674 table contains a 32-bit index into the pool of section numbers. For unused
11675 hash table slots, the corresponding entry in the parallel table will be 0.
11677 The pool of section numbers begins immediately following the hash table
11678 (at offset 16 + 12 * M from the beginning of the section). The pool of
11679 section numbers consists of an array of 32-bit words (using the byte order
11680 of the application binary). Each item in the array is indexed starting
11681 from 0. The hash table entry provides the index of the first section
11682 number in the set. Additional section numbers in the set follow, and the
11683 set is terminated by a 0 entry (section number 0 is not used in ELF).
11685 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11686 section must be the first entry in the set, and the .debug_abbrev.dwo must
11687 be the second entry. Other members of the set may follow in any order.
11691 DWP Versions 2 and 5:
11693 DWP Versions 2 and 5 combine all the .debug_info, etc. sections into one,
11694 and the entries in the index tables are now offsets into these sections.
11695 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11698 Index Section Contents:
11700 Hash Table of Signatures dwp_hash_table.hash_table
11701 Parallel Table of Indices dwp_hash_table.unit_table
11702 Table of Section Offsets dwp_hash_table.{v2|v5}.{section_ids,offsets}
11703 Table of Section Sizes dwp_hash_table.{v2|v5}.sizes
11705 The index section header consists of:
11707 V, 32 bit version number
11708 L, 32 bit number of columns in the table of section offsets
11709 N, 32 bit number of compilation units or type units in the index
11710 M, 32 bit number of slots in the hash table
11712 Numbers are recorded using the byte order of the application binary.
11714 The hash table has the same format as version 1.
11715 The parallel table of indices has the same format as version 1,
11716 except that the entries are origin-1 indices into the table of sections
11717 offsets and the table of section sizes.
11719 The table of offsets begins immediately following the parallel table
11720 (at offset 16 + 12 * M from the beginning of the section). The table is
11721 a two-dimensional array of 32-bit words (using the byte order of the
11722 application binary), with L columns and N+1 rows, in row-major order.
11723 Each row in the array is indexed starting from 0. The first row provides
11724 a key to the remaining rows: each column in this row provides an identifier
11725 for a debug section, and the offsets in the same column of subsequent rows
11726 refer to that section. The section identifiers for Version 2 are:
11728 DW_SECT_INFO 1 .debug_info.dwo
11729 DW_SECT_TYPES 2 .debug_types.dwo
11730 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11731 DW_SECT_LINE 4 .debug_line.dwo
11732 DW_SECT_LOC 5 .debug_loc.dwo
11733 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11734 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11735 DW_SECT_MACRO 8 .debug_macro.dwo
11737 The section identifiers for Version 5 are:
11739 DW_SECT_INFO_V5 1 .debug_info.dwo
11740 DW_SECT_RESERVED_V5 2 --
11741 DW_SECT_ABBREV_V5 3 .debug_abbrev.dwo
11742 DW_SECT_LINE_V5 4 .debug_line.dwo
11743 DW_SECT_LOCLISTS_V5 5 .debug_loclists.dwo
11744 DW_SECT_STR_OFFSETS_V5 6 .debug_str_offsets.dwo
11745 DW_SECT_MACRO_V5 7 .debug_macro.dwo
11746 DW_SECT_RNGLISTS_V5 8 .debug_rnglists.dwo
11748 The offsets provided by the CU and TU index sections are the base offsets
11749 for the contributions made by each CU or TU to the corresponding section
11750 in the package file. Each CU and TU header contains an abbrev_offset
11751 field, used to find the abbreviations table for that CU or TU within the
11752 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11753 be interpreted as relative to the base offset given in the index section.
11754 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11755 should be interpreted as relative to the base offset for .debug_line.dwo,
11756 and offsets into other debug sections obtained from DWARF attributes should
11757 also be interpreted as relative to the corresponding base offset.
11759 The table of sizes begins immediately following the table of offsets.
11760 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11761 with L columns and N rows, in row-major order. Each row in the array is
11762 indexed starting from 1 (row 0 is shared by the two tables).
11766 Hash table lookup is handled the same in version 1 and 2:
11768 We assume that N and M will not exceed 2^32 - 1.
11769 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11771 Given a 64-bit compilation unit signature or a type signature S, an entry
11772 in the hash table is located as follows:
11774 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11775 the low-order k bits all set to 1.
11777 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11779 3) If the hash table entry at index H matches the signature, use that
11780 entry. If the hash table entry at index H is unused (all zeroes),
11781 terminate the search: the signature is not present in the table.
11783 4) Let H = (H + H') modulo M. Repeat at Step 3.
11785 Because M > N and H' and M are relatively prime, the search is guaranteed
11786 to stop at an unused slot or find the match. */
11788 /* Create a hash table to map DWO IDs to their CU/TU entry in
11789 .debug_{info,types}.dwo in DWP_FILE.
11790 Returns NULL if there isn't one.
11791 Note: This function processes DWP files only, not DWO files. */
11793 static struct dwp_hash_table
*
11794 create_dwp_hash_table (dwarf2_per_objfile
*per_objfile
,
11795 struct dwp_file
*dwp_file
, int is_debug_types
)
11797 struct objfile
*objfile
= per_objfile
->objfile
;
11798 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11799 const gdb_byte
*index_ptr
, *index_end
;
11800 struct dwarf2_section_info
*index
;
11801 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11802 struct dwp_hash_table
*htab
;
11804 if (is_debug_types
)
11805 index
= &dwp_file
->sections
.tu_index
;
11807 index
= &dwp_file
->sections
.cu_index
;
11809 if (index
->empty ())
11811 index
->read (objfile
);
11813 index_ptr
= index
->buffer
;
11814 index_end
= index_ptr
+ index
->size
;
11816 /* For Version 5, the version is really 2 bytes of data & 2 bytes of padding.
11817 For now it's safe to just read 4 bytes (particularly as it's difficult to
11818 tell if you're dealing with Version 5 before you've read the version). */
11819 version
= read_4_bytes (dbfd
, index_ptr
);
11821 if (version
== 2 || version
== 5)
11822 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11826 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11828 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11831 if (version
!= 1 && version
!= 2 && version
!= 5)
11833 error (_("Dwarf Error: unsupported DWP file version (%s)"
11834 " [in module %s]"),
11835 pulongest (version
), dwp_file
->name
);
11837 if (nr_slots
!= (nr_slots
& -nr_slots
))
11839 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11840 " is not power of 2 [in module %s]"),
11841 pulongest (nr_slots
), dwp_file
->name
);
11844 htab
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwp_hash_table
);
11845 htab
->version
= version
;
11846 htab
->nr_columns
= nr_columns
;
11847 htab
->nr_units
= nr_units
;
11848 htab
->nr_slots
= nr_slots
;
11849 htab
->hash_table
= index_ptr
;
11850 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11852 /* Exit early if the table is empty. */
11853 if (nr_slots
== 0 || nr_units
== 0
11854 || (version
== 2 && nr_columns
== 0)
11855 || (version
== 5 && nr_columns
== 0))
11857 /* All must be zero. */
11858 if (nr_slots
!= 0 || nr_units
!= 0
11859 || (version
== 2 && nr_columns
!= 0)
11860 || (version
== 5 && nr_columns
!= 0))
11862 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11863 " all zero [in modules %s]"),
11871 htab
->section_pool
.v1
.indices
=
11872 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11873 /* It's harder to decide whether the section is too small in v1.
11874 V1 is deprecated anyway so we punt. */
11876 else if (version
== 2)
11878 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11879 int *ids
= htab
->section_pool
.v2
.section_ids
;
11880 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11881 /* Reverse map for error checking. */
11882 int ids_seen
[DW_SECT_MAX
+ 1];
11885 if (nr_columns
< 2)
11887 error (_("Dwarf Error: bad DWP hash table, too few columns"
11888 " in section table [in module %s]"),
11891 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11893 error (_("Dwarf Error: bad DWP hash table, too many columns"
11894 " in section table [in module %s]"),
11897 memset (ids
, 255, sizeof_ids
);
11898 memset (ids_seen
, 255, sizeof (ids_seen
));
11899 for (i
= 0; i
< nr_columns
; ++i
)
11901 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11903 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11905 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11906 " in section table [in module %s]"),
11907 id
, dwp_file
->name
);
11909 if (ids_seen
[id
] != -1)
11911 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11912 " id %d in section table [in module %s]"),
11913 id
, dwp_file
->name
);
11918 /* Must have exactly one info or types section. */
11919 if (((ids_seen
[DW_SECT_INFO
] != -1)
11920 + (ids_seen
[DW_SECT_TYPES
] != -1))
11923 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11924 " DWO info/types section [in module %s]"),
11927 /* Must have an abbrev section. */
11928 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11930 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11931 " section [in module %s]"),
11934 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11935 htab
->section_pool
.v2
.sizes
=
11936 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11937 * nr_units
* nr_columns
);
11938 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11939 * nr_units
* nr_columns
))
11942 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11943 " [in module %s]"),
11947 else /* version == 5 */
11949 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11950 int *ids
= htab
->section_pool
.v5
.section_ids
;
11951 size_t sizeof_ids
= sizeof (htab
->section_pool
.v5
.section_ids
);
11952 /* Reverse map for error checking. */
11953 int ids_seen
[DW_SECT_MAX_V5
+ 1];
11955 if (nr_columns
< 2)
11957 error (_("Dwarf Error: bad DWP hash table, too few columns"
11958 " in section table [in module %s]"),
11961 if (nr_columns
> MAX_NR_V5_DWO_SECTIONS
)
11963 error (_("Dwarf Error: bad DWP hash table, too many columns"
11964 " in section table [in module %s]"),
11967 memset (ids
, 255, sizeof_ids
);
11968 memset (ids_seen
, 255, sizeof (ids_seen
));
11969 for (int i
= 0; i
< nr_columns
; ++i
)
11971 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11973 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX_V5
)
11975 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11976 " in section table [in module %s]"),
11977 id
, dwp_file
->name
);
11979 if (ids_seen
[id
] != -1)
11981 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11982 " id %d in section table [in module %s]"),
11983 id
, dwp_file
->name
);
11988 /* Must have seen an info section. */
11989 if (ids_seen
[DW_SECT_INFO_V5
] == -1)
11991 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11992 " DWO info/types section [in module %s]"),
11995 /* Must have an abbrev section. */
11996 if (ids_seen
[DW_SECT_ABBREV_V5
] == -1)
11998 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11999 " section [in module %s]"),
12002 htab
->section_pool
.v5
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12003 htab
->section_pool
.v5
.sizes
12004 = htab
->section_pool
.v5
.offsets
+ (sizeof (uint32_t)
12005 * nr_units
* nr_columns
);
12006 if ((htab
->section_pool
.v5
.sizes
+ (sizeof (uint32_t)
12007 * nr_units
* nr_columns
))
12010 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12011 " [in module %s]"),
12019 /* Update SECTIONS with the data from SECTP.
12021 This function is like the other "locate" section routines, but in
12022 this context the sections to read comes from the DWP V1 hash table,
12023 not the full ELF section table.
12025 The result is non-zero for success, or zero if an error was found. */
12028 locate_v1_virtual_dwo_sections (asection
*sectp
,
12029 struct virtual_v1_dwo_sections
*sections
)
12031 const struct dwop_section_names
*names
= &dwop_section_names
;
12033 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12035 /* There can be only one. */
12036 if (sections
->abbrev
.s
.section
!= NULL
)
12038 sections
->abbrev
.s
.section
= sectp
;
12039 sections
->abbrev
.size
= bfd_section_size (sectp
);
12041 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12042 || section_is_p (sectp
->name
, &names
->types_dwo
))
12044 /* There can be only one. */
12045 if (sections
->info_or_types
.s
.section
!= NULL
)
12047 sections
->info_or_types
.s
.section
= sectp
;
12048 sections
->info_or_types
.size
= bfd_section_size (sectp
);
12050 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12052 /* There can be only one. */
12053 if (sections
->line
.s
.section
!= NULL
)
12055 sections
->line
.s
.section
= sectp
;
12056 sections
->line
.size
= bfd_section_size (sectp
);
12058 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12060 /* There can be only one. */
12061 if (sections
->loc
.s
.section
!= NULL
)
12063 sections
->loc
.s
.section
= sectp
;
12064 sections
->loc
.size
= bfd_section_size (sectp
);
12066 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12068 /* There can be only one. */
12069 if (sections
->macinfo
.s
.section
!= NULL
)
12071 sections
->macinfo
.s
.section
= sectp
;
12072 sections
->macinfo
.size
= bfd_section_size (sectp
);
12074 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12076 /* There can be only one. */
12077 if (sections
->macro
.s
.section
!= NULL
)
12079 sections
->macro
.s
.section
= sectp
;
12080 sections
->macro
.size
= bfd_section_size (sectp
);
12082 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12084 /* There can be only one. */
12085 if (sections
->str_offsets
.s
.section
!= NULL
)
12087 sections
->str_offsets
.s
.section
= sectp
;
12088 sections
->str_offsets
.size
= bfd_section_size (sectp
);
12092 /* No other kind of section is valid. */
12099 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12100 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12101 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12102 This is for DWP version 1 files. */
12104 static struct dwo_unit
*
12105 create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
*per_objfile
,
12106 struct dwp_file
*dwp_file
,
12107 uint32_t unit_index
,
12108 const char *comp_dir
,
12109 ULONGEST signature
, int is_debug_types
)
12111 const struct dwp_hash_table
*dwp_htab
=
12112 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12113 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12114 const char *kind
= is_debug_types
? "TU" : "CU";
12115 struct dwo_file
*dwo_file
;
12116 struct dwo_unit
*dwo_unit
;
12117 struct virtual_v1_dwo_sections sections
;
12118 void **dwo_file_slot
;
12121 gdb_assert (dwp_file
->version
== 1);
12123 dwarf_read_debug_printf ("Reading %s %s/%s in DWP V1 file: %s",
12124 kind
, pulongest (unit_index
), hex_string (signature
),
12127 /* Fetch the sections of this DWO unit.
12128 Put a limit on the number of sections we look for so that bad data
12129 doesn't cause us to loop forever. */
12131 #define MAX_NR_V1_DWO_SECTIONS \
12132 (1 /* .debug_info or .debug_types */ \
12133 + 1 /* .debug_abbrev */ \
12134 + 1 /* .debug_line */ \
12135 + 1 /* .debug_loc */ \
12136 + 1 /* .debug_str_offsets */ \
12137 + 1 /* .debug_macro or .debug_macinfo */ \
12138 + 1 /* trailing zero */)
12140 memset (§ions
, 0, sizeof (sections
));
12142 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12145 uint32_t section_nr
=
12146 read_4_bytes (dbfd
,
12147 dwp_htab
->section_pool
.v1
.indices
12148 + (unit_index
+ i
) * sizeof (uint32_t));
12150 if (section_nr
== 0)
12152 if (section_nr
>= dwp_file
->num_sections
)
12154 error (_("Dwarf Error: bad DWP hash table, section number too large"
12155 " [in module %s]"),
12159 sectp
= dwp_file
->elf_sections
[section_nr
];
12160 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12162 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12163 " [in module %s]"),
12169 || sections
.info_or_types
.empty ()
12170 || sections
.abbrev
.empty ())
12172 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12173 " [in module %s]"),
12176 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12178 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12179 " [in module %s]"),
12183 /* It's easier for the rest of the code if we fake a struct dwo_file and
12184 have dwo_unit "live" in that. At least for now.
12186 The DWP file can be made up of a random collection of CUs and TUs.
12187 However, for each CU + set of TUs that came from the same original DWO
12188 file, we can combine them back into a virtual DWO file to save space
12189 (fewer struct dwo_file objects to allocate). Remember that for really
12190 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12192 std::string virtual_dwo_name
=
12193 string_printf ("virtual-dwo/%d-%d-%d-%d",
12194 sections
.abbrev
.get_id (),
12195 sections
.line
.get_id (),
12196 sections
.loc
.get_id (),
12197 sections
.str_offsets
.get_id ());
12198 /* Can we use an existing virtual DWO file? */
12199 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, virtual_dwo_name
.c_str (),
12201 /* Create one if necessary. */
12202 if (*dwo_file_slot
== NULL
)
12204 dwarf_read_debug_printf ("Creating virtual DWO: %s",
12205 virtual_dwo_name
.c_str ());
12207 dwo_file
= new struct dwo_file
;
12208 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12209 dwo_file
->comp_dir
= comp_dir
;
12210 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12211 dwo_file
->sections
.line
= sections
.line
;
12212 dwo_file
->sections
.loc
= sections
.loc
;
12213 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12214 dwo_file
->sections
.macro
= sections
.macro
;
12215 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12216 /* The "str" section is global to the entire DWP file. */
12217 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12218 /* The info or types section is assigned below to dwo_unit,
12219 there's no need to record it in dwo_file.
12220 Also, we can't simply record type sections in dwo_file because
12221 we record a pointer into the vector in dwo_unit. As we collect more
12222 types we'll grow the vector and eventually have to reallocate space
12223 for it, invalidating all copies of pointers into the previous
12225 *dwo_file_slot
= dwo_file
;
12229 dwarf_read_debug_printf ("Using existing virtual DWO: %s",
12230 virtual_dwo_name
.c_str ());
12232 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12235 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12236 dwo_unit
->dwo_file
= dwo_file
;
12237 dwo_unit
->signature
= signature
;
12238 dwo_unit
->section
=
12239 XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12240 *dwo_unit
->section
= sections
.info_or_types
;
12241 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12246 /* Subroutine of create_dwo_unit_in_dwp_v2 and create_dwo_unit_in_dwp_v5 to
12247 simplify them. Given a pointer to the containing section SECTION, and
12248 OFFSET,SIZE of the piece within that section used by a TU/CU, return a
12249 virtual section of just that piece. */
12251 static struct dwarf2_section_info
12252 create_dwp_v2_or_v5_section (dwarf2_per_objfile
*per_objfile
,
12253 struct dwarf2_section_info
*section
,
12254 bfd_size_type offset
, bfd_size_type size
)
12256 struct dwarf2_section_info result
;
12259 gdb_assert (section
!= NULL
);
12260 gdb_assert (!section
->is_virtual
);
12262 memset (&result
, 0, sizeof (result
));
12263 result
.s
.containing_section
= section
;
12264 result
.is_virtual
= true;
12269 sectp
= section
->get_bfd_section ();
12271 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12272 bounds of the real section. This is a pretty-rare event, so just
12273 flag an error (easier) instead of a warning and trying to cope. */
12275 || offset
+ size
> bfd_section_size (sectp
))
12277 error (_("Dwarf Error: Bad DWP V2 or V5 section info, doesn't fit"
12278 " in section %s [in module %s]"),
12279 sectp
? bfd_section_name (sectp
) : "<unknown>",
12280 objfile_name (per_objfile
->objfile
));
12283 result
.virtual_offset
= offset
;
12284 result
.size
= size
;
12288 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12289 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12290 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12291 This is for DWP version 2 files. */
12293 static struct dwo_unit
*
12294 create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
*per_objfile
,
12295 struct dwp_file
*dwp_file
,
12296 uint32_t unit_index
,
12297 const char *comp_dir
,
12298 ULONGEST signature
, int is_debug_types
)
12300 const struct dwp_hash_table
*dwp_htab
=
12301 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12302 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12303 const char *kind
= is_debug_types
? "TU" : "CU";
12304 struct dwo_file
*dwo_file
;
12305 struct dwo_unit
*dwo_unit
;
12306 struct virtual_v2_or_v5_dwo_sections sections
;
12307 void **dwo_file_slot
;
12310 gdb_assert (dwp_file
->version
== 2);
12312 dwarf_read_debug_printf ("Reading %s %s/%s in DWP V2 file: %s",
12313 kind
, pulongest (unit_index
), hex_string (signature
),
12316 /* Fetch the section offsets of this DWO unit. */
12318 memset (§ions
, 0, sizeof (sections
));
12320 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12322 uint32_t offset
= read_4_bytes (dbfd
,
12323 dwp_htab
->section_pool
.v2
.offsets
12324 + (((unit_index
- 1) * dwp_htab
->nr_columns
12326 * sizeof (uint32_t)));
12327 uint32_t size
= read_4_bytes (dbfd
,
12328 dwp_htab
->section_pool
.v2
.sizes
12329 + (((unit_index
- 1) * dwp_htab
->nr_columns
12331 * sizeof (uint32_t)));
12333 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12336 case DW_SECT_TYPES
:
12337 sections
.info_or_types_offset
= offset
;
12338 sections
.info_or_types_size
= size
;
12340 case DW_SECT_ABBREV
:
12341 sections
.abbrev_offset
= offset
;
12342 sections
.abbrev_size
= size
;
12345 sections
.line_offset
= offset
;
12346 sections
.line_size
= size
;
12349 sections
.loc_offset
= offset
;
12350 sections
.loc_size
= size
;
12352 case DW_SECT_STR_OFFSETS
:
12353 sections
.str_offsets_offset
= offset
;
12354 sections
.str_offsets_size
= size
;
12356 case DW_SECT_MACINFO
:
12357 sections
.macinfo_offset
= offset
;
12358 sections
.macinfo_size
= size
;
12360 case DW_SECT_MACRO
:
12361 sections
.macro_offset
= offset
;
12362 sections
.macro_size
= size
;
12367 /* It's easier for the rest of the code if we fake a struct dwo_file and
12368 have dwo_unit "live" in that. At least for now.
12370 The DWP file can be made up of a random collection of CUs and TUs.
12371 However, for each CU + set of TUs that came from the same original DWO
12372 file, we can combine them back into a virtual DWO file to save space
12373 (fewer struct dwo_file objects to allocate). Remember that for really
12374 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12376 std::string virtual_dwo_name
=
12377 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12378 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12379 (long) (sections
.line_size
? sections
.line_offset
: 0),
12380 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12381 (long) (sections
.str_offsets_size
12382 ? sections
.str_offsets_offset
: 0));
12383 /* Can we use an existing virtual DWO file? */
12384 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, virtual_dwo_name
.c_str (),
12386 /* Create one if necessary. */
12387 if (*dwo_file_slot
== NULL
)
12389 dwarf_read_debug_printf ("Creating virtual DWO: %s",
12390 virtual_dwo_name
.c_str ());
12392 dwo_file
= new struct dwo_file
;
12393 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12394 dwo_file
->comp_dir
= comp_dir
;
12395 dwo_file
->sections
.abbrev
=
12396 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.abbrev
,
12397 sections
.abbrev_offset
,
12398 sections
.abbrev_size
);
12399 dwo_file
->sections
.line
=
12400 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.line
,
12401 sections
.line_offset
,
12402 sections
.line_size
);
12403 dwo_file
->sections
.loc
=
12404 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.loc
,
12405 sections
.loc_offset
, sections
.loc_size
);
12406 dwo_file
->sections
.macinfo
=
12407 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.macinfo
,
12408 sections
.macinfo_offset
,
12409 sections
.macinfo_size
);
12410 dwo_file
->sections
.macro
=
12411 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.macro
,
12412 sections
.macro_offset
,
12413 sections
.macro_size
);
12414 dwo_file
->sections
.str_offsets
=
12415 create_dwp_v2_or_v5_section (per_objfile
,
12416 &dwp_file
->sections
.str_offsets
,
12417 sections
.str_offsets_offset
,
12418 sections
.str_offsets_size
);
12419 /* The "str" section is global to the entire DWP file. */
12420 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12421 /* The info or types section is assigned below to dwo_unit,
12422 there's no need to record it in dwo_file.
12423 Also, we can't simply record type sections in dwo_file because
12424 we record a pointer into the vector in dwo_unit. As we collect more
12425 types we'll grow the vector and eventually have to reallocate space
12426 for it, invalidating all copies of pointers into the previous
12428 *dwo_file_slot
= dwo_file
;
12432 dwarf_read_debug_printf ("Using existing virtual DWO: %s",
12433 virtual_dwo_name
.c_str ());
12435 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12438 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12439 dwo_unit
->dwo_file
= dwo_file
;
12440 dwo_unit
->signature
= signature
;
12441 dwo_unit
->section
=
12442 XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12443 *dwo_unit
->section
= create_dwp_v2_or_v5_section
12446 ? &dwp_file
->sections
.types
12447 : &dwp_file
->sections
.info
,
12448 sections
.info_or_types_offset
,
12449 sections
.info_or_types_size
);
12450 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12455 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12456 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12457 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12458 This is for DWP version 5 files. */
12460 static struct dwo_unit
*
12461 create_dwo_unit_in_dwp_v5 (dwarf2_per_objfile
*per_objfile
,
12462 struct dwp_file
*dwp_file
,
12463 uint32_t unit_index
,
12464 const char *comp_dir
,
12465 ULONGEST signature
, int is_debug_types
)
12467 const struct dwp_hash_table
*dwp_htab
12468 = is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12469 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12470 const char *kind
= is_debug_types
? "TU" : "CU";
12471 struct dwo_file
*dwo_file
;
12472 struct dwo_unit
*dwo_unit
;
12473 struct virtual_v2_or_v5_dwo_sections sections
{};
12474 void **dwo_file_slot
;
12476 gdb_assert (dwp_file
->version
== 5);
12478 dwarf_read_debug_printf ("Reading %s %s/%s in DWP V5 file: %s",
12479 kind
, pulongest (unit_index
), hex_string (signature
),
12482 /* Fetch the section offsets of this DWO unit. */
12484 /* memset (§ions, 0, sizeof (sections)); */
12486 for (int i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12488 uint32_t offset
= read_4_bytes (dbfd
,
12489 dwp_htab
->section_pool
.v5
.offsets
12490 + (((unit_index
- 1)
12491 * dwp_htab
->nr_columns
12493 * sizeof (uint32_t)));
12494 uint32_t size
= read_4_bytes (dbfd
,
12495 dwp_htab
->section_pool
.v5
.sizes
12496 + (((unit_index
- 1) * dwp_htab
->nr_columns
12498 * sizeof (uint32_t)));
12500 switch (dwp_htab
->section_pool
.v5
.section_ids
[i
])
12502 case DW_SECT_ABBREV_V5
:
12503 sections
.abbrev_offset
= offset
;
12504 sections
.abbrev_size
= size
;
12506 case DW_SECT_INFO_V5
:
12507 sections
.info_or_types_offset
= offset
;
12508 sections
.info_or_types_size
= size
;
12510 case DW_SECT_LINE_V5
:
12511 sections
.line_offset
= offset
;
12512 sections
.line_size
= size
;
12514 case DW_SECT_LOCLISTS_V5
:
12515 sections
.loclists_offset
= offset
;
12516 sections
.loclists_size
= size
;
12518 case DW_SECT_MACRO_V5
:
12519 sections
.macro_offset
= offset
;
12520 sections
.macro_size
= size
;
12522 case DW_SECT_RNGLISTS_V5
:
12523 sections
.rnglists_offset
= offset
;
12524 sections
.rnglists_size
= size
;
12526 case DW_SECT_STR_OFFSETS_V5
:
12527 sections
.str_offsets_offset
= offset
;
12528 sections
.str_offsets_size
= size
;
12530 case DW_SECT_RESERVED_V5
:
12536 /* It's easier for the rest of the code if we fake a struct dwo_file and
12537 have dwo_unit "live" in that. At least for now.
12539 The DWP file can be made up of a random collection of CUs and TUs.
12540 However, for each CU + set of TUs that came from the same original DWO
12541 file, we can combine them back into a virtual DWO file to save space
12542 (fewer struct dwo_file objects to allocate). Remember that for really
12543 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12545 std::string virtual_dwo_name
=
12546 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld-%ld-%ld",
12547 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12548 (long) (sections
.line_size
? sections
.line_offset
: 0),
12549 (long) (sections
.loclists_size
? sections
.loclists_offset
: 0),
12550 (long) (sections
.str_offsets_size
12551 ? sections
.str_offsets_offset
: 0),
12552 (long) (sections
.macro_size
? sections
.macro_offset
: 0),
12553 (long) (sections
.rnglists_size
? sections
.rnglists_offset
: 0));
12554 /* Can we use an existing virtual DWO file? */
12555 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
,
12556 virtual_dwo_name
.c_str (),
12558 /* Create one if necessary. */
12559 if (*dwo_file_slot
== NULL
)
12561 dwarf_read_debug_printf ("Creating virtual DWO: %s",
12562 virtual_dwo_name
.c_str ());
12564 dwo_file
= new struct dwo_file
;
12565 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12566 dwo_file
->comp_dir
= comp_dir
;
12567 dwo_file
->sections
.abbrev
=
12568 create_dwp_v2_or_v5_section (per_objfile
,
12569 &dwp_file
->sections
.abbrev
,
12570 sections
.abbrev_offset
,
12571 sections
.abbrev_size
);
12572 dwo_file
->sections
.line
=
12573 create_dwp_v2_or_v5_section (per_objfile
,
12574 &dwp_file
->sections
.line
,
12575 sections
.line_offset
, sections
.line_size
);
12576 dwo_file
->sections
.macro
=
12577 create_dwp_v2_or_v5_section (per_objfile
,
12578 &dwp_file
->sections
.macro
,
12579 sections
.macro_offset
,
12580 sections
.macro_size
);
12581 dwo_file
->sections
.loclists
=
12582 create_dwp_v2_or_v5_section (per_objfile
,
12583 &dwp_file
->sections
.loclists
,
12584 sections
.loclists_offset
,
12585 sections
.loclists_size
);
12586 dwo_file
->sections
.rnglists
=
12587 create_dwp_v2_or_v5_section (per_objfile
,
12588 &dwp_file
->sections
.rnglists
,
12589 sections
.rnglists_offset
,
12590 sections
.rnglists_size
);
12591 dwo_file
->sections
.str_offsets
=
12592 create_dwp_v2_or_v5_section (per_objfile
,
12593 &dwp_file
->sections
.str_offsets
,
12594 sections
.str_offsets_offset
,
12595 sections
.str_offsets_size
);
12596 /* The "str" section is global to the entire DWP file. */
12597 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12598 /* The info or types section is assigned below to dwo_unit,
12599 there's no need to record it in dwo_file.
12600 Also, we can't simply record type sections in dwo_file because
12601 we record a pointer into the vector in dwo_unit. As we collect more
12602 types we'll grow the vector and eventually have to reallocate space
12603 for it, invalidating all copies of pointers into the previous
12605 *dwo_file_slot
= dwo_file
;
12609 dwarf_read_debug_printf ("Using existing virtual DWO: %s",
12610 virtual_dwo_name
.c_str ());
12612 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12615 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12616 dwo_unit
->dwo_file
= dwo_file
;
12617 dwo_unit
->signature
= signature
;
12619 = XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12620 *dwo_unit
->section
= create_dwp_v2_or_v5_section (per_objfile
,
12621 &dwp_file
->sections
.info
,
12622 sections
.info_or_types_offset
,
12623 sections
.info_or_types_size
);
12624 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12629 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12630 Returns NULL if the signature isn't found. */
12632 static struct dwo_unit
*
12633 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
*per_objfile
,
12634 struct dwp_file
*dwp_file
, const char *comp_dir
,
12635 ULONGEST signature
, int is_debug_types
)
12637 const struct dwp_hash_table
*dwp_htab
=
12638 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12639 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12640 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12641 uint32_t hash
= signature
& mask
;
12642 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12645 struct dwo_unit find_dwo_cu
;
12647 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12648 find_dwo_cu
.signature
= signature
;
12649 slot
= htab_find_slot (is_debug_types
12650 ? dwp_file
->loaded_tus
.get ()
12651 : dwp_file
->loaded_cus
.get (),
12652 &find_dwo_cu
, INSERT
);
12655 return (struct dwo_unit
*) *slot
;
12657 /* Use a for loop so that we don't loop forever on bad debug info. */
12658 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12660 ULONGEST signature_in_table
;
12662 signature_in_table
=
12663 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12664 if (signature_in_table
== signature
)
12666 uint32_t unit_index
=
12667 read_4_bytes (dbfd
,
12668 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12670 if (dwp_file
->version
== 1)
12672 *slot
= create_dwo_unit_in_dwp_v1 (per_objfile
, dwp_file
,
12673 unit_index
, comp_dir
,
12674 signature
, is_debug_types
);
12676 else if (dwp_file
->version
== 2)
12678 *slot
= create_dwo_unit_in_dwp_v2 (per_objfile
, dwp_file
,
12679 unit_index
, comp_dir
,
12680 signature
, is_debug_types
);
12682 else /* version == 5 */
12684 *slot
= create_dwo_unit_in_dwp_v5 (per_objfile
, dwp_file
,
12685 unit_index
, comp_dir
,
12686 signature
, is_debug_types
);
12688 return (struct dwo_unit
*) *slot
;
12690 if (signature_in_table
== 0)
12692 hash
= (hash
+ hash2
) & mask
;
12695 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12696 " [in module %s]"),
12700 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12701 Open the file specified by FILE_NAME and hand it off to BFD for
12702 preliminary analysis. Return a newly initialized bfd *, which
12703 includes a canonicalized copy of FILE_NAME.
12704 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12705 SEARCH_CWD is true if the current directory is to be searched.
12706 It will be searched before debug-file-directory.
12707 If successful, the file is added to the bfd include table of the
12708 objfile's bfd (see gdb_bfd_record_inclusion).
12709 If unable to find/open the file, return NULL.
12710 NOTE: This function is derived from symfile_bfd_open. */
12712 static gdb_bfd_ref_ptr
12713 try_open_dwop_file (dwarf2_per_objfile
*per_objfile
,
12714 const char *file_name
, int is_dwp
, int search_cwd
)
12717 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12718 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12719 to debug_file_directory. */
12720 const char *search_path
;
12721 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12723 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12726 if (*debug_file_directory
!= '\0')
12728 search_path_holder
.reset (concat (".", dirname_separator_string
,
12729 debug_file_directory
,
12731 search_path
= search_path_holder
.get ();
12737 search_path
= debug_file_directory
;
12739 openp_flags flags
= OPF_RETURN_REALPATH
;
12741 flags
|= OPF_SEARCH_IN_PATH
;
12743 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12744 desc
= openp (search_path
, flags
, file_name
,
12745 O_RDONLY
| O_BINARY
, &absolute_name
);
12749 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12751 if (sym_bfd
== NULL
)
12753 bfd_set_cacheable (sym_bfd
.get (), 1);
12755 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12758 /* Success. Record the bfd as having been included by the objfile's bfd.
12759 This is important because things like demangled_names_hash lives in the
12760 objfile's per_bfd space and may have references to things like symbol
12761 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12762 gdb_bfd_record_inclusion (per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12767 /* Try to open DWO file FILE_NAME.
12768 COMP_DIR is the DW_AT_comp_dir attribute.
12769 The result is the bfd handle of the file.
12770 If there is a problem finding or opening the file, return NULL.
12771 Upon success, the canonicalized path of the file is stored in the bfd,
12772 same as symfile_bfd_open. */
12774 static gdb_bfd_ref_ptr
12775 open_dwo_file (dwarf2_per_objfile
*per_objfile
,
12776 const char *file_name
, const char *comp_dir
)
12778 if (IS_ABSOLUTE_PATH (file_name
))
12779 return try_open_dwop_file (per_objfile
, file_name
,
12780 0 /*is_dwp*/, 0 /*search_cwd*/);
12782 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12784 if (comp_dir
!= NULL
)
12786 gdb::unique_xmalloc_ptr
<char> path_to_try
12787 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12789 /* NOTE: If comp_dir is a relative path, this will also try the
12790 search path, which seems useful. */
12791 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (per_objfile
, path_to_try
.get (),
12793 1 /*search_cwd*/));
12798 /* That didn't work, try debug-file-directory, which, despite its name,
12799 is a list of paths. */
12801 if (*debug_file_directory
== '\0')
12804 return try_open_dwop_file (per_objfile
, file_name
,
12805 0 /*is_dwp*/, 1 /*search_cwd*/);
12808 /* This function is mapped across the sections and remembers the offset and
12809 size of each of the DWO debugging sections we are interested in. */
12812 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
,
12813 dwo_sections
*dwo_sections
)
12815 const struct dwop_section_names
*names
= &dwop_section_names
;
12817 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12819 dwo_sections
->abbrev
.s
.section
= sectp
;
12820 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12822 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12824 dwo_sections
->info
.s
.section
= sectp
;
12825 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12827 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12829 dwo_sections
->line
.s
.section
= sectp
;
12830 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12832 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12834 dwo_sections
->loc
.s
.section
= sectp
;
12835 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12837 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12839 dwo_sections
->loclists
.s
.section
= sectp
;
12840 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12842 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12844 dwo_sections
->macinfo
.s
.section
= sectp
;
12845 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12847 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12849 dwo_sections
->macro
.s
.section
= sectp
;
12850 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12852 else if (section_is_p (sectp
->name
, &names
->rnglists_dwo
))
12854 dwo_sections
->rnglists
.s
.section
= sectp
;
12855 dwo_sections
->rnglists
.size
= bfd_section_size (sectp
);
12857 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12859 dwo_sections
->str
.s
.section
= sectp
;
12860 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12862 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12864 dwo_sections
->str_offsets
.s
.section
= sectp
;
12865 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12867 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12869 struct dwarf2_section_info type_section
;
12871 memset (&type_section
, 0, sizeof (type_section
));
12872 type_section
.s
.section
= sectp
;
12873 type_section
.size
= bfd_section_size (sectp
);
12874 dwo_sections
->types
.push_back (type_section
);
12878 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12879 by PER_CU. This is for the non-DWP case.
12880 The result is NULL if DWO_NAME can't be found. */
12882 static struct dwo_file
*
12883 open_and_init_dwo_file (dwarf2_cu
*cu
, const char *dwo_name
,
12884 const char *comp_dir
)
12886 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
12888 gdb_bfd_ref_ptr dbfd
= open_dwo_file (per_objfile
, dwo_name
, comp_dir
);
12891 dwarf_read_debug_printf ("DWO file not found: %s", dwo_name
);
12896 dwo_file_up
dwo_file (new struct dwo_file
);
12897 dwo_file
->dwo_name
= dwo_name
;
12898 dwo_file
->comp_dir
= comp_dir
;
12899 dwo_file
->dbfd
= std::move (dbfd
);
12901 for (asection
*sec
: gdb_bfd_sections (dwo_file
->dbfd
))
12902 dwarf2_locate_dwo_sections (dwo_file
->dbfd
.get (), sec
,
12903 &dwo_file
->sections
);
12905 create_cus_hash_table (per_objfile
, cu
, *dwo_file
, dwo_file
->sections
.info
,
12908 if (cu
->per_cu
->dwarf_version
< 5)
12910 create_debug_types_hash_table (per_objfile
, dwo_file
.get (),
12911 dwo_file
->sections
.types
, dwo_file
->tus
);
12915 create_debug_type_hash_table (per_objfile
, dwo_file
.get (),
12916 &dwo_file
->sections
.info
, dwo_file
->tus
,
12920 dwarf_read_debug_printf ("DWO file found: %s", dwo_name
);
12922 return dwo_file
.release ();
12925 /* This function is mapped across the sections and remembers the offset and
12926 size of each of the DWP debugging sections common to version 1 and 2 that
12927 we are interested in. */
12930 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12931 dwp_file
*dwp_file
)
12933 const struct dwop_section_names
*names
= &dwop_section_names
;
12934 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12936 /* Record the ELF section number for later lookup: this is what the
12937 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12938 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12939 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12941 /* Look for specific sections that we need. */
12942 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12944 dwp_file
->sections
.str
.s
.section
= sectp
;
12945 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12947 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12949 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12950 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12952 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12954 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12955 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12959 /* This function is mapped across the sections and remembers the offset and
12960 size of each of the DWP version 2 debugging sections that we are interested
12961 in. This is split into a separate function because we don't know if we
12962 have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */
12965 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12967 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12968 const struct dwop_section_names
*names
= &dwop_section_names
;
12969 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12971 /* Record the ELF section number for later lookup: this is what the
12972 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12973 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12974 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12976 /* Look for specific sections that we need. */
12977 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12979 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12980 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12982 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12984 dwp_file
->sections
.info
.s
.section
= sectp
;
12985 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12987 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12989 dwp_file
->sections
.line
.s
.section
= sectp
;
12990 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12992 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12994 dwp_file
->sections
.loc
.s
.section
= sectp
;
12995 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12997 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12999 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13000 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
13002 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13004 dwp_file
->sections
.macro
.s
.section
= sectp
;
13005 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
13007 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13009 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13010 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
13012 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13014 dwp_file
->sections
.types
.s
.section
= sectp
;
13015 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
13019 /* This function is mapped across the sections and remembers the offset and
13020 size of each of the DWP version 5 debugging sections that we are interested
13021 in. This is split into a separate function because we don't know if we
13022 have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */
13025 dwarf2_locate_v5_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13027 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13028 const struct dwop_section_names
*names
= &dwop_section_names
;
13029 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13031 /* Record the ELF section number for later lookup: this is what the
13032 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13033 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13034 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13036 /* Look for specific sections that we need. */
13037 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13039 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13040 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
13042 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13044 dwp_file
->sections
.info
.s
.section
= sectp
;
13045 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
13047 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13049 dwp_file
->sections
.line
.s
.section
= sectp
;
13050 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
13052 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
13054 dwp_file
->sections
.loclists
.s
.section
= sectp
;
13055 dwp_file
->sections
.loclists
.size
= bfd_section_size (sectp
);
13057 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13059 dwp_file
->sections
.macro
.s
.section
= sectp
;
13060 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
13062 else if (section_is_p (sectp
->name
, &names
->rnglists_dwo
))
13064 dwp_file
->sections
.rnglists
.s
.section
= sectp
;
13065 dwp_file
->sections
.rnglists
.size
= bfd_section_size (sectp
);
13067 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13069 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13070 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
13074 /* Hash function for dwp_file loaded CUs/TUs. */
13077 hash_dwp_loaded_cutus (const void *item
)
13079 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13081 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13082 return dwo_unit
->signature
;
13085 /* Equality function for dwp_file loaded CUs/TUs. */
13088 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13090 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13091 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13093 return dua
->signature
== dub
->signature
;
13096 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13099 allocate_dwp_loaded_cutus_table ()
13101 return htab_up (htab_create_alloc (3,
13102 hash_dwp_loaded_cutus
,
13103 eq_dwp_loaded_cutus
,
13104 NULL
, xcalloc
, xfree
));
13107 /* Try to open DWP file FILE_NAME.
13108 The result is the bfd handle of the file.
13109 If there is a problem finding or opening the file, return NULL.
13110 Upon success, the canonicalized path of the file is stored in the bfd,
13111 same as symfile_bfd_open. */
13113 static gdb_bfd_ref_ptr
13114 open_dwp_file (dwarf2_per_objfile
*per_objfile
, const char *file_name
)
13116 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (per_objfile
, file_name
,
13118 1 /*search_cwd*/));
13122 /* Work around upstream bug 15652.
13123 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13124 [Whether that's a "bug" is debatable, but it is getting in our way.]
13125 We have no real idea where the dwp file is, because gdb's realpath-ing
13126 of the executable's path may have discarded the needed info.
13127 [IWBN if the dwp file name was recorded in the executable, akin to
13128 .gnu_debuglink, but that doesn't exist yet.]
13129 Strip the directory from FILE_NAME and search again. */
13130 if (*debug_file_directory
!= '\0')
13132 /* Don't implicitly search the current directory here.
13133 If the user wants to search "." to handle this case,
13134 it must be added to debug-file-directory. */
13135 return try_open_dwop_file (per_objfile
, lbasename (file_name
),
13143 /* Initialize the use of the DWP file for the current objfile.
13144 By convention the name of the DWP file is ${objfile}.dwp.
13145 The result is NULL if it can't be found. */
13147 static std::unique_ptr
<struct dwp_file
>
13148 open_and_init_dwp_file (dwarf2_per_objfile
*per_objfile
)
13150 struct objfile
*objfile
= per_objfile
->objfile
;
13152 /* Try to find first .dwp for the binary file before any symbolic links
13155 /* If the objfile is a debug file, find the name of the real binary
13156 file and get the name of dwp file from there. */
13157 std::string dwp_name
;
13158 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13160 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13161 const char *backlink_basename
= lbasename (backlink
->original_name
);
13163 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13166 dwp_name
= objfile
->original_name
;
13168 dwp_name
+= ".dwp";
13170 gdb_bfd_ref_ptr
dbfd (open_dwp_file (per_objfile
, dwp_name
.c_str ()));
13172 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13174 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13175 dwp_name
= objfile_name (objfile
);
13176 dwp_name
+= ".dwp";
13177 dbfd
= open_dwp_file (per_objfile
, dwp_name
.c_str ());
13182 dwarf_read_debug_printf ("DWP file not found: %s", dwp_name
.c_str ());
13184 return std::unique_ptr
<dwp_file
> ();
13187 const char *name
= bfd_get_filename (dbfd
.get ());
13188 std::unique_ptr
<struct dwp_file
> dwp_file
13189 (new struct dwp_file (name
, std::move (dbfd
)));
13191 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13192 dwp_file
->elf_sections
=
13193 OBSTACK_CALLOC (&per_objfile
->per_bfd
->obstack
,
13194 dwp_file
->num_sections
, asection
*);
13196 for (asection
*sec
: gdb_bfd_sections (dwp_file
->dbfd
))
13197 dwarf2_locate_common_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13200 dwp_file
->cus
= create_dwp_hash_table (per_objfile
, dwp_file
.get (), 0);
13202 dwp_file
->tus
= create_dwp_hash_table (per_objfile
, dwp_file
.get (), 1);
13204 /* The DWP file version is stored in the hash table. Oh well. */
13205 if (dwp_file
->cus
&& dwp_file
->tus
13206 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13208 /* Technically speaking, we should try to limp along, but this is
13209 pretty bizarre. We use pulongest here because that's the established
13210 portability solution (e.g, we cannot use %u for uint32_t). */
13211 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13212 " TU version %s [in DWP file %s]"),
13213 pulongest (dwp_file
->cus
->version
),
13214 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13218 dwp_file
->version
= dwp_file
->cus
->version
;
13219 else if (dwp_file
->tus
)
13220 dwp_file
->version
= dwp_file
->tus
->version
;
13222 dwp_file
->version
= 2;
13224 for (asection
*sec
: gdb_bfd_sections (dwp_file
->dbfd
))
13226 if (dwp_file
->version
== 2)
13227 dwarf2_locate_v2_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13230 dwarf2_locate_v5_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13234 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
13235 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
13237 dwarf_read_debug_printf ("DWP file found: %s", dwp_file
->name
);
13238 dwarf_read_debug_printf (" %s CUs, %s TUs",
13239 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13240 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13245 /* Wrapper around open_and_init_dwp_file, only open it once. */
13247 static struct dwp_file
*
13248 get_dwp_file (dwarf2_per_objfile
*per_objfile
)
13250 if (!per_objfile
->per_bfd
->dwp_checked
)
13252 per_objfile
->per_bfd
->dwp_file
= open_and_init_dwp_file (per_objfile
);
13253 per_objfile
->per_bfd
->dwp_checked
= 1;
13255 return per_objfile
->per_bfd
->dwp_file
.get ();
13258 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13259 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13260 or in the DWP file for the objfile, referenced by THIS_UNIT.
13261 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13262 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13264 This is called, for example, when wanting to read a variable with a
13265 complex location. Therefore we don't want to do file i/o for every call.
13266 Therefore we don't want to look for a DWO file on every call.
13267 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13268 then we check if we've already seen DWO_NAME, and only THEN do we check
13271 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13272 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13274 static struct dwo_unit
*
13275 lookup_dwo_cutu (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
13276 ULONGEST signature
, int is_debug_types
)
13278 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13279 struct objfile
*objfile
= per_objfile
->objfile
;
13280 const char *kind
= is_debug_types
? "TU" : "CU";
13281 void **dwo_file_slot
;
13282 struct dwo_file
*dwo_file
;
13283 struct dwp_file
*dwp_file
;
13285 /* First see if there's a DWP file.
13286 If we have a DWP file but didn't find the DWO inside it, don't
13287 look for the original DWO file. It makes gdb behave differently
13288 depending on whether one is debugging in the build tree. */
13290 dwp_file
= get_dwp_file (per_objfile
);
13291 if (dwp_file
!= NULL
)
13293 const struct dwp_hash_table
*dwp_htab
=
13294 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13296 if (dwp_htab
!= NULL
)
13298 struct dwo_unit
*dwo_cutu
=
13299 lookup_dwo_unit_in_dwp (per_objfile
, dwp_file
, comp_dir
, signature
,
13302 if (dwo_cutu
!= NULL
)
13304 dwarf_read_debug_printf ("Virtual DWO %s %s found: @%s",
13305 kind
, hex_string (signature
),
13306 host_address_to_string (dwo_cutu
));
13314 /* No DWP file, look for the DWO file. */
13316 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, dwo_name
, comp_dir
);
13317 if (*dwo_file_slot
== NULL
)
13319 /* Read in the file and build a table of the CUs/TUs it contains. */
13320 *dwo_file_slot
= open_and_init_dwo_file (cu
, dwo_name
, comp_dir
);
13322 /* NOTE: This will be NULL if unable to open the file. */
13323 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13325 if (dwo_file
!= NULL
)
13327 struct dwo_unit
*dwo_cutu
= NULL
;
13329 if (is_debug_types
&& dwo_file
->tus
)
13331 struct dwo_unit find_dwo_cutu
;
13333 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13334 find_dwo_cutu
.signature
= signature
;
13336 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
13339 else if (!is_debug_types
&& dwo_file
->cus
)
13341 struct dwo_unit find_dwo_cutu
;
13343 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13344 find_dwo_cutu
.signature
= signature
;
13345 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
13349 if (dwo_cutu
!= NULL
)
13351 dwarf_read_debug_printf ("DWO %s %s(%s) found: @%s",
13352 kind
, dwo_name
, hex_string (signature
),
13353 host_address_to_string (dwo_cutu
));
13360 /* We didn't find it. This could mean a dwo_id mismatch, or
13361 someone deleted the DWO/DWP file, or the search path isn't set up
13362 correctly to find the file. */
13364 dwarf_read_debug_printf ("DWO %s %s(%s) not found",
13365 kind
, dwo_name
, hex_string (signature
));
13367 /* This is a warning and not a complaint because it can be caused by
13368 pilot error (e.g., user accidentally deleting the DWO). */
13370 /* Print the name of the DWP file if we looked there, helps the user
13371 better diagnose the problem. */
13372 std::string dwp_text
;
13374 if (dwp_file
!= NULL
)
13375 dwp_text
= string_printf (" [in DWP file %s]",
13376 lbasename (dwp_file
->name
));
13378 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13379 " [in module %s]"),
13380 kind
, dwo_name
, hex_string (signature
), dwp_text
.c_str (), kind
,
13381 sect_offset_str (cu
->per_cu
->sect_off
), objfile_name (objfile
));
13386 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13387 See lookup_dwo_cutu_unit for details. */
13389 static struct dwo_unit
*
13390 lookup_dwo_comp_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
13391 ULONGEST signature
)
13393 gdb_assert (!cu
->per_cu
->is_debug_types
);
13395 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, signature
, 0);
13398 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13399 See lookup_dwo_cutu_unit for details. */
13401 static struct dwo_unit
*
13402 lookup_dwo_type_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
)
13404 gdb_assert (cu
->per_cu
->is_debug_types
);
13406 signatured_type
*sig_type
= (signatured_type
*) cu
->per_cu
;
13408 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, sig_type
->signature
, 1);
13411 /* Traversal function for queue_and_load_all_dwo_tus. */
13414 queue_and_load_dwo_tu (void **slot
, void *info
)
13416 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13417 dwarf2_cu
*cu
= (dwarf2_cu
*) info
;
13418 ULONGEST signature
= dwo_unit
->signature
;
13419 signatured_type
*sig_type
= lookup_dwo_signatured_type (cu
, signature
);
13421 if (sig_type
!= NULL
)
13423 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13425 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13426 a real dependency of PER_CU on SIG_TYPE. That is detected later
13427 while processing PER_CU. */
13428 if (maybe_queue_comp_unit (NULL
, sig_cu
, cu
->per_objfile
, cu
->language
))
13429 load_full_type_unit (sig_cu
, cu
->per_objfile
);
13430 cu
->per_cu
->imported_symtabs_push (sig_cu
);
13436 /* Queue all TUs contained in the DWO of CU to be read in.
13437 The DWO may have the only definition of the type, though it may not be
13438 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13439 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13442 queue_and_load_all_dwo_tus (dwarf2_cu
*cu
)
13444 struct dwo_unit
*dwo_unit
;
13445 struct dwo_file
*dwo_file
;
13447 gdb_assert (cu
!= nullptr);
13448 gdb_assert (!cu
->per_cu
->is_debug_types
);
13449 gdb_assert (get_dwp_file (cu
->per_objfile
) == nullptr);
13451 dwo_unit
= cu
->dwo_unit
;
13452 gdb_assert (dwo_unit
!= NULL
);
13454 dwo_file
= dwo_unit
->dwo_file
;
13455 if (dwo_file
->tus
!= NULL
)
13456 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
, cu
);
13459 /* Read in various DIEs. */
13461 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13462 Inherit only the children of the DW_AT_abstract_origin DIE not being
13463 already referenced by DW_AT_abstract_origin from the children of the
13467 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13469 struct die_info
*child_die
;
13470 sect_offset
*offsetp
;
13471 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13472 struct die_info
*origin_die
;
13473 /* Iterator of the ORIGIN_DIE children. */
13474 struct die_info
*origin_child_die
;
13475 struct attribute
*attr
;
13476 struct dwarf2_cu
*origin_cu
;
13477 struct pending
**origin_previous_list_in_scope
;
13479 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13483 /* Note that following die references may follow to a die in a
13487 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13489 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13491 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13492 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13494 if (die
->tag
!= origin_die
->tag
13495 && !(die
->tag
== DW_TAG_inlined_subroutine
13496 && origin_die
->tag
== DW_TAG_subprogram
))
13497 complaint (_("DIE %s and its abstract origin %s have different tags"),
13498 sect_offset_str (die
->sect_off
),
13499 sect_offset_str (origin_die
->sect_off
));
13501 std::vector
<sect_offset
> offsets
;
13503 for (child_die
= die
->child
;
13504 child_die
&& child_die
->tag
;
13505 child_die
= child_die
->sibling
)
13507 struct die_info
*child_origin_die
;
13508 struct dwarf2_cu
*child_origin_cu
;
13510 /* We are trying to process concrete instance entries:
13511 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13512 it's not relevant to our analysis here. i.e. detecting DIEs that are
13513 present in the abstract instance but not referenced in the concrete
13515 if (child_die
->tag
== DW_TAG_call_site
13516 || child_die
->tag
== DW_TAG_GNU_call_site
)
13519 /* For each CHILD_DIE, find the corresponding child of
13520 ORIGIN_DIE. If there is more than one layer of
13521 DW_AT_abstract_origin, follow them all; there shouldn't be,
13522 but GCC versions at least through 4.4 generate this (GCC PR
13524 child_origin_die
= child_die
;
13525 child_origin_cu
= cu
;
13528 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13532 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13536 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13537 counterpart may exist. */
13538 if (child_origin_die
!= child_die
)
13540 if (child_die
->tag
!= child_origin_die
->tag
13541 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13542 && child_origin_die
->tag
== DW_TAG_subprogram
))
13543 complaint (_("Child DIE %s and its abstract origin %s have "
13545 sect_offset_str (child_die
->sect_off
),
13546 sect_offset_str (child_origin_die
->sect_off
));
13547 if (child_origin_die
->parent
!= origin_die
)
13548 complaint (_("Child DIE %s and its abstract origin %s have "
13549 "different parents"),
13550 sect_offset_str (child_die
->sect_off
),
13551 sect_offset_str (child_origin_die
->sect_off
));
13553 offsets
.push_back (child_origin_die
->sect_off
);
13556 std::sort (offsets
.begin (), offsets
.end ());
13557 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13558 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13559 if (offsetp
[-1] == *offsetp
)
13560 complaint (_("Multiple children of DIE %s refer "
13561 "to DIE %s as their abstract origin"),
13562 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13564 offsetp
= offsets
.data ();
13565 origin_child_die
= origin_die
->child
;
13566 while (origin_child_die
&& origin_child_die
->tag
)
13568 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13569 while (offsetp
< offsets_end
13570 && *offsetp
< origin_child_die
->sect_off
)
13572 if (offsetp
>= offsets_end
13573 || *offsetp
> origin_child_die
->sect_off
)
13575 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13576 Check whether we're already processing ORIGIN_CHILD_DIE.
13577 This can happen with mutually referenced abstract_origins.
13579 if (!origin_child_die
->in_process
)
13580 process_die (origin_child_die
, origin_cu
);
13582 origin_child_die
= origin_child_die
->sibling
;
13584 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13586 if (cu
!= origin_cu
)
13587 compute_delayed_physnames (origin_cu
);
13591 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13593 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13594 struct gdbarch
*gdbarch
= objfile
->arch ();
13595 struct context_stack
*newobj
;
13598 struct die_info
*child_die
;
13599 struct attribute
*attr
, *call_line
, *call_file
;
13601 CORE_ADDR baseaddr
;
13602 struct block
*block
;
13603 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13604 std::vector
<struct symbol
*> template_args
;
13605 struct template_symbol
*templ_func
= NULL
;
13609 /* If we do not have call site information, we can't show the
13610 caller of this inlined function. That's too confusing, so
13611 only use the scope for local variables. */
13612 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13613 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13614 if (call_line
== NULL
|| call_file
== NULL
)
13616 read_lexical_block_scope (die
, cu
);
13621 baseaddr
= objfile
->text_section_offset ();
13623 name
= dwarf2_name (die
, cu
);
13625 /* Ignore functions with missing or empty names. These are actually
13626 illegal according to the DWARF standard. */
13629 complaint (_("missing name for subprogram DIE at %s"),
13630 sect_offset_str (die
->sect_off
));
13634 /* Ignore functions with missing or invalid low and high pc attributes. */
13635 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13636 <= PC_BOUNDS_INVALID
)
13638 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13639 if (attr
== nullptr || !attr
->as_boolean ())
13640 complaint (_("cannot get low and high bounds "
13641 "for subprogram DIE at %s"),
13642 sect_offset_str (die
->sect_off
));
13646 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13647 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13649 /* If we have any template arguments, then we must allocate a
13650 different sort of symbol. */
13651 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13653 if (child_die
->tag
== DW_TAG_template_type_param
13654 || child_die
->tag
== DW_TAG_template_value_param
)
13656 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13657 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13662 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13663 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13664 (struct symbol
*) templ_func
);
13666 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13667 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13670 /* If there is a location expression for DW_AT_frame_base, record
13672 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13673 if (attr
!= nullptr)
13674 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13676 /* If there is a location for the static link, record it. */
13677 newobj
->static_link
= NULL
;
13678 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13679 if (attr
!= nullptr)
13681 newobj
->static_link
13682 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13683 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13687 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13689 if (die
->child
!= NULL
)
13691 child_die
= die
->child
;
13692 while (child_die
&& child_die
->tag
)
13694 if (child_die
->tag
== DW_TAG_template_type_param
13695 || child_die
->tag
== DW_TAG_template_value_param
)
13697 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13700 template_args
.push_back (arg
);
13703 process_die (child_die
, cu
);
13704 child_die
= child_die
->sibling
;
13708 inherit_abstract_dies (die
, cu
);
13710 /* If we have a DW_AT_specification, we might need to import using
13711 directives from the context of the specification DIE. See the
13712 comment in determine_prefix. */
13713 if (cu
->language
== language_cplus
13714 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13716 struct dwarf2_cu
*spec_cu
= cu
;
13717 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13721 child_die
= spec_die
->child
;
13722 while (child_die
&& child_die
->tag
)
13724 if (child_die
->tag
== DW_TAG_imported_module
)
13725 process_die (child_die
, spec_cu
);
13726 child_die
= child_die
->sibling
;
13729 /* In some cases, GCC generates specification DIEs that
13730 themselves contain DW_AT_specification attributes. */
13731 spec_die
= die_specification (spec_die
, &spec_cu
);
13735 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13736 /* Make a block for the local symbols within. */
13737 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13738 cstk
.static_link
, lowpc
, highpc
);
13740 /* For C++, set the block's scope. */
13741 if ((cu
->language
== language_cplus
13742 || cu
->language
== language_fortran
13743 || cu
->language
== language_d
13744 || cu
->language
== language_rust
)
13745 && cu
->processing_has_namespace_info
)
13746 block_set_scope (block
, determine_prefix (die
, cu
),
13747 &objfile
->objfile_obstack
);
13749 /* If we have address ranges, record them. */
13750 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13752 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13754 /* Attach template arguments to function. */
13755 if (!template_args
.empty ())
13757 gdb_assert (templ_func
!= NULL
);
13759 templ_func
->n_template_arguments
= template_args
.size ();
13760 templ_func
->template_arguments
13761 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13762 templ_func
->n_template_arguments
);
13763 memcpy (templ_func
->template_arguments
,
13764 template_args
.data (),
13765 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13767 /* Make sure that the symtab is set on the new symbols. Even
13768 though they don't appear in this symtab directly, other parts
13769 of gdb assume that symbols do, and this is reasonably
13771 for (symbol
*sym
: template_args
)
13772 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13775 /* In C++, we can have functions nested inside functions (e.g., when
13776 a function declares a class that has methods). This means that
13777 when we finish processing a function scope, we may need to go
13778 back to building a containing block's symbol lists. */
13779 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13780 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13782 /* If we've finished processing a top-level function, subsequent
13783 symbols go in the file symbol list. */
13784 if (cu
->get_builder ()->outermost_context_p ())
13785 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13788 /* Process all the DIES contained within a lexical block scope. Start
13789 a new scope, process the dies, and then close the scope. */
13792 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13794 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13795 struct gdbarch
*gdbarch
= objfile
->arch ();
13796 CORE_ADDR lowpc
, highpc
;
13797 struct die_info
*child_die
;
13798 CORE_ADDR baseaddr
;
13800 baseaddr
= objfile
->text_section_offset ();
13802 /* Ignore blocks with missing or invalid low and high pc attributes. */
13803 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13804 as multiple lexical blocks? Handling children in a sane way would
13805 be nasty. Might be easier to properly extend generic blocks to
13806 describe ranges. */
13807 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13809 case PC_BOUNDS_NOT_PRESENT
:
13810 /* DW_TAG_lexical_block has no attributes, process its children as if
13811 there was no wrapping by that DW_TAG_lexical_block.
13812 GCC does no longer produces such DWARF since GCC r224161. */
13813 for (child_die
= die
->child
;
13814 child_die
!= NULL
&& child_die
->tag
;
13815 child_die
= child_die
->sibling
)
13817 /* We might already be processing this DIE. This can happen
13818 in an unusual circumstance -- where a subroutine A
13819 appears lexically in another subroutine B, but A actually
13820 inlines B. The recursion is broken here, rather than in
13821 inherit_abstract_dies, because it seems better to simply
13822 drop concrete children here. */
13823 if (!child_die
->in_process
)
13824 process_die (child_die
, cu
);
13827 case PC_BOUNDS_INVALID
:
13830 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13831 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13833 cu
->get_builder ()->push_context (0, lowpc
);
13834 if (die
->child
!= NULL
)
13836 child_die
= die
->child
;
13837 while (child_die
&& child_die
->tag
)
13839 process_die (child_die
, cu
);
13840 child_die
= child_die
->sibling
;
13843 inherit_abstract_dies (die
, cu
);
13844 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13846 if (*cu
->get_builder ()->get_local_symbols () != NULL
13847 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13849 struct block
*block
13850 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13851 cstk
.start_addr
, highpc
);
13853 /* Note that recording ranges after traversing children, as we
13854 do here, means that recording a parent's ranges entails
13855 walking across all its children's ranges as they appear in
13856 the address map, which is quadratic behavior.
13858 It would be nicer to record the parent's ranges before
13859 traversing its children, simply overriding whatever you find
13860 there. But since we don't even decide whether to create a
13861 block until after we've traversed its children, that's hard
13863 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13865 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13866 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13869 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13872 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13874 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13875 struct objfile
*objfile
= per_objfile
->objfile
;
13876 struct gdbarch
*gdbarch
= objfile
->arch ();
13877 CORE_ADDR pc
, baseaddr
;
13878 struct attribute
*attr
;
13879 struct call_site
*call_site
, call_site_local
;
13882 struct die_info
*child_die
;
13884 baseaddr
= objfile
->text_section_offset ();
13886 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13889 /* This was a pre-DWARF-5 GNU extension alias
13890 for DW_AT_call_return_pc. */
13891 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13895 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13896 "DIE %s [in module %s]"),
13897 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13900 pc
= attr
->as_address () + baseaddr
;
13901 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13903 if (cu
->call_site_htab
== NULL
)
13904 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13905 NULL
, &objfile
->objfile_obstack
,
13906 hashtab_obstack_allocate
, NULL
);
13907 call_site_local
.pc
= pc
;
13908 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13911 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13912 "DIE %s [in module %s]"),
13913 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13914 objfile_name (objfile
));
13918 /* Count parameters at the caller. */
13921 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13922 child_die
= child_die
->sibling
)
13924 if (child_die
->tag
!= DW_TAG_call_site_parameter
13925 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13927 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13928 "DW_TAG_call_site child DIE %s [in module %s]"),
13929 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13930 objfile_name (objfile
));
13938 = ((struct call_site
*)
13939 obstack_alloc (&objfile
->objfile_obstack
,
13940 sizeof (*call_site
)
13941 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13943 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13944 call_site
->pc
= pc
;
13946 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13947 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13949 struct die_info
*func_die
;
13951 /* Skip also over DW_TAG_inlined_subroutine. */
13952 for (func_die
= die
->parent
;
13953 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13954 && func_die
->tag
!= DW_TAG_subroutine_type
;
13955 func_die
= func_die
->parent
);
13957 /* DW_AT_call_all_calls is a superset
13958 of DW_AT_call_all_tail_calls. */
13960 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13961 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13962 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13963 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13965 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13966 not complete. But keep CALL_SITE for look ups via call_site_htab,
13967 both the initial caller containing the real return address PC and
13968 the final callee containing the current PC of a chain of tail
13969 calls do not need to have the tail call list complete. But any
13970 function candidate for a virtual tail call frame searched via
13971 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13972 determined unambiguously. */
13976 struct type
*func_type
= NULL
;
13979 func_type
= get_die_type (func_die
, cu
);
13980 if (func_type
!= NULL
)
13982 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13984 /* Enlist this call site to the function. */
13985 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13986 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13989 complaint (_("Cannot find function owning DW_TAG_call_site "
13990 "DIE %s [in module %s]"),
13991 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13995 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13997 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13999 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14002 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14003 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14005 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14006 if (!attr
|| (attr
->form_is_block () && attr
->as_block ()->size
== 0))
14007 /* Keep NULL DWARF_BLOCK. */;
14008 else if (attr
->form_is_block ())
14010 struct dwarf2_locexpr_baton
*dlbaton
;
14011 struct dwarf_block
*block
= attr
->as_block ();
14013 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14014 dlbaton
->data
= block
->data
;
14015 dlbaton
->size
= block
->size
;
14016 dlbaton
->per_objfile
= per_objfile
;
14017 dlbaton
->per_cu
= cu
->per_cu
;
14019 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14021 else if (attr
->form_is_ref ())
14023 struct dwarf2_cu
*target_cu
= cu
;
14024 struct die_info
*target_die
;
14026 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14027 gdb_assert (target_cu
->per_objfile
->objfile
== objfile
);
14028 if (die_is_declaration (target_die
, target_cu
))
14030 const char *target_physname
;
14032 /* Prefer the mangled name; otherwise compute the demangled one. */
14033 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14034 if (target_physname
== NULL
)
14035 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14036 if (target_physname
== NULL
)
14037 complaint (_("DW_AT_call_target target DIE has invalid "
14038 "physname, for referencing DIE %s [in module %s]"),
14039 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14041 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14047 /* DW_AT_entry_pc should be preferred. */
14048 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14049 <= PC_BOUNDS_INVALID
)
14050 complaint (_("DW_AT_call_target target DIE has invalid "
14051 "low pc, for referencing DIE %s [in module %s]"),
14052 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14055 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14056 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14061 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14062 "block nor reference, for DIE %s [in module %s]"),
14063 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14065 call_site
->per_cu
= cu
->per_cu
;
14066 call_site
->per_objfile
= per_objfile
;
14068 for (child_die
= die
->child
;
14069 child_die
&& child_die
->tag
;
14070 child_die
= child_die
->sibling
)
14072 struct call_site_parameter
*parameter
;
14073 struct attribute
*loc
, *origin
;
14075 if (child_die
->tag
!= DW_TAG_call_site_parameter
14076 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14078 /* Already printed the complaint above. */
14082 gdb_assert (call_site
->parameter_count
< nparams
);
14083 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14085 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14086 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14087 register is contained in DW_AT_call_value. */
14089 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14090 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14091 if (origin
== NULL
)
14093 /* This was a pre-DWARF-5 GNU extension alias
14094 for DW_AT_call_parameter. */
14095 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14097 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
14099 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14101 sect_offset sect_off
= origin
->get_ref_die_offset ();
14102 if (!cu
->header
.offset_in_cu_p (sect_off
))
14104 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14105 binding can be done only inside one CU. Such referenced DIE
14106 therefore cannot be even moved to DW_TAG_partial_unit. */
14107 complaint (_("DW_AT_call_parameter offset is not in CU for "
14108 "DW_TAG_call_site child DIE %s [in module %s]"),
14109 sect_offset_str (child_die
->sect_off
),
14110 objfile_name (objfile
));
14113 parameter
->u
.param_cu_off
14114 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14116 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
14118 complaint (_("No DW_FORM_block* DW_AT_location for "
14119 "DW_TAG_call_site child DIE %s [in module %s]"),
14120 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14125 struct dwarf_block
*block
= loc
->as_block ();
14127 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14128 (block
->data
, &block
->data
[block
->size
]);
14129 if (parameter
->u
.dwarf_reg
!= -1)
14130 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14131 else if (dwarf_block_to_sp_offset (gdbarch
, block
->data
,
14132 &block
->data
[block
->size
],
14133 ¶meter
->u
.fb_offset
))
14134 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14137 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14138 "for DW_FORM_block* DW_AT_location is supported for "
14139 "DW_TAG_call_site child DIE %s "
14141 sect_offset_str (child_die
->sect_off
),
14142 objfile_name (objfile
));
14147 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14149 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14150 if (attr
== NULL
|| !attr
->form_is_block ())
14152 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14153 "DW_TAG_call_site child DIE %s [in module %s]"),
14154 sect_offset_str (child_die
->sect_off
),
14155 objfile_name (objfile
));
14159 struct dwarf_block
*block
= attr
->as_block ();
14160 parameter
->value
= block
->data
;
14161 parameter
->value_size
= block
->size
;
14163 /* Parameters are not pre-cleared by memset above. */
14164 parameter
->data_value
= NULL
;
14165 parameter
->data_value_size
= 0;
14166 call_site
->parameter_count
++;
14168 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14170 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14171 if (attr
!= nullptr)
14173 if (!attr
->form_is_block ())
14174 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14175 "DW_TAG_call_site child DIE %s [in module %s]"),
14176 sect_offset_str (child_die
->sect_off
),
14177 objfile_name (objfile
));
14180 block
= attr
->as_block ();
14181 parameter
->data_value
= block
->data
;
14182 parameter
->data_value_size
= block
->size
;
14188 /* Helper function for read_variable. If DIE represents a virtual
14189 table, then return the type of the concrete object that is
14190 associated with the virtual table. Otherwise, return NULL. */
14192 static struct type
*
14193 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14195 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14199 /* Find the type DIE. */
14200 struct die_info
*type_die
= NULL
;
14201 struct dwarf2_cu
*type_cu
= cu
;
14203 if (attr
->form_is_ref ())
14204 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14205 if (type_die
== NULL
)
14208 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14210 return die_containing_type (type_die
, type_cu
);
14213 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14216 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14218 struct rust_vtable_symbol
*storage
= NULL
;
14220 if (cu
->language
== language_rust
)
14222 struct type
*containing_type
= rust_containing_type (die
, cu
);
14224 if (containing_type
!= NULL
)
14226 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14228 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
14229 storage
->concrete_type
= containing_type
;
14230 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14234 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14235 struct attribute
*abstract_origin
14236 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14237 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14238 if (res
== NULL
&& loc
&& abstract_origin
)
14240 /* We have a variable without a name, but with a location and an abstract
14241 origin. This may be a concrete instance of an abstract variable
14242 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14244 struct dwarf2_cu
*origin_cu
= cu
;
14245 struct die_info
*origin_die
14246 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14247 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14248 per_objfile
->per_bfd
->abstract_to_concrete
14249 [origin_die
->sect_off
].push_back (die
->sect_off
);
14253 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14254 reading .debug_rnglists.
14255 Callback's type should be:
14256 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14257 Return true if the attributes are present and valid, otherwise,
14260 template <typename Callback
>
14262 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14263 dwarf_tag tag
, Callback
&&callback
)
14265 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14266 struct objfile
*objfile
= per_objfile
->objfile
;
14267 bfd
*obfd
= objfile
->obfd
;
14268 /* Base address selection entry. */
14269 gdb::optional
<CORE_ADDR
> base
;
14270 const gdb_byte
*buffer
;
14271 CORE_ADDR baseaddr
;
14272 bool overflow
= false;
14273 ULONGEST addr_index
;
14274 struct dwarf2_section_info
*rnglists_section
;
14276 base
= cu
->base_address
;
14277 rnglists_section
= cu_debug_rnglists_section (cu
, tag
);
14278 rnglists_section
->read (objfile
);
14280 if (offset
>= rnglists_section
->size
)
14282 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14286 buffer
= rnglists_section
->buffer
+ offset
;
14288 baseaddr
= objfile
->text_section_offset ();
14292 /* Initialize it due to a false compiler warning. */
14293 CORE_ADDR range_beginning
= 0, range_end
= 0;
14294 const gdb_byte
*buf_end
= (rnglists_section
->buffer
14295 + rnglists_section
->size
);
14296 unsigned int bytes_read
;
14298 if (buffer
== buf_end
)
14303 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14306 case DW_RLE_end_of_list
:
14308 case DW_RLE_base_address
:
14309 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14314 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
14315 buffer
+= bytes_read
;
14317 case DW_RLE_base_addressx
:
14318 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14319 buffer
+= bytes_read
;
14320 base
= read_addr_index (cu
, addr_index
);
14322 case DW_RLE_start_length
:
14323 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14328 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
14330 buffer
+= bytes_read
;
14331 range_end
= (range_beginning
14332 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14333 buffer
+= bytes_read
;
14334 if (buffer
> buf_end
)
14340 case DW_RLE_startx_length
:
14341 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14342 buffer
+= bytes_read
;
14343 range_beginning
= read_addr_index (cu
, addr_index
);
14344 if (buffer
> buf_end
)
14349 range_end
= (range_beginning
14350 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14351 buffer
+= bytes_read
;
14353 case DW_RLE_offset_pair
:
14354 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14355 buffer
+= bytes_read
;
14356 if (buffer
> buf_end
)
14361 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14362 buffer
+= bytes_read
;
14363 if (buffer
> buf_end
)
14369 case DW_RLE_start_end
:
14370 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14375 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
14377 buffer
+= bytes_read
;
14378 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
14379 buffer
+= bytes_read
;
14381 case DW_RLE_startx_endx
:
14382 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14383 buffer
+= bytes_read
;
14384 range_beginning
= read_addr_index (cu
, addr_index
);
14385 if (buffer
> buf_end
)
14390 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14391 buffer
+= bytes_read
;
14392 range_end
= read_addr_index (cu
, addr_index
);
14395 complaint (_("Invalid .debug_rnglists data (no base address)"));
14398 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14400 if (rlet
== DW_RLE_base_address
)
14403 if (range_beginning
> range_end
)
14405 /* Inverted range entries are invalid. */
14406 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14410 /* Empty range entries have no effect. */
14411 if (range_beginning
== range_end
)
14414 /* Only DW_RLE_offset_pair needs the base address added. */
14415 if (rlet
== DW_RLE_offset_pair
)
14417 if (!base
.has_value ())
14419 /* We have no valid base address for the DW_RLE_offset_pair. */
14420 complaint (_("Invalid .debug_rnglists data (no base address for "
14421 "DW_RLE_offset_pair)"));
14425 range_beginning
+= *base
;
14426 range_end
+= *base
;
14429 /* A not-uncommon case of bad debug info.
14430 Don't pollute the addrmap with bad data. */
14431 if (range_beginning
+ baseaddr
== 0
14432 && !per_objfile
->per_bfd
->has_section_at_zero
)
14434 complaint (_(".debug_rnglists entry has start address of zero"
14435 " [in module %s]"), objfile_name (objfile
));
14439 callback (range_beginning
, range_end
);
14444 complaint (_("Offset %d is not terminated "
14445 "for DW_AT_ranges attribute"),
14453 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14454 Callback's type should be:
14455 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14456 Return 1 if the attributes are present and valid, otherwise, return 0. */
14458 template <typename Callback
>
14460 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
, dwarf_tag tag
,
14461 Callback
&&callback
)
14463 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14464 struct objfile
*objfile
= per_objfile
->objfile
;
14465 struct comp_unit_head
*cu_header
= &cu
->header
;
14466 bfd
*obfd
= objfile
->obfd
;
14467 unsigned int addr_size
= cu_header
->addr_size
;
14468 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14469 /* Base address selection entry. */
14470 gdb::optional
<CORE_ADDR
> base
;
14471 unsigned int dummy
;
14472 const gdb_byte
*buffer
;
14473 CORE_ADDR baseaddr
;
14475 if (cu_header
->version
>= 5)
14476 return dwarf2_rnglists_process (offset
, cu
, tag
, callback
);
14478 base
= cu
->base_address
;
14480 per_objfile
->per_bfd
->ranges
.read (objfile
);
14481 if (offset
>= per_objfile
->per_bfd
->ranges
.size
)
14483 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14487 buffer
= per_objfile
->per_bfd
->ranges
.buffer
+ offset
;
14489 baseaddr
= objfile
->text_section_offset ();
14493 CORE_ADDR range_beginning
, range_end
;
14495 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
14496 buffer
+= addr_size
;
14497 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
14498 buffer
+= addr_size
;
14499 offset
+= 2 * addr_size
;
14501 /* An end of list marker is a pair of zero addresses. */
14502 if (range_beginning
== 0 && range_end
== 0)
14503 /* Found the end of list entry. */
14506 /* Each base address selection entry is a pair of 2 values.
14507 The first is the largest possible address, the second is
14508 the base address. Check for a base address here. */
14509 if ((range_beginning
& mask
) == mask
)
14511 /* If we found the largest possible address, then we already
14512 have the base address in range_end. */
14517 if (!base
.has_value ())
14519 /* We have no valid base address for the ranges
14521 complaint (_("Invalid .debug_ranges data (no base address)"));
14525 if (range_beginning
> range_end
)
14527 /* Inverted range entries are invalid. */
14528 complaint (_("Invalid .debug_ranges data (inverted range)"));
14532 /* Empty range entries have no effect. */
14533 if (range_beginning
== range_end
)
14536 range_beginning
+= *base
;
14537 range_end
+= *base
;
14539 /* A not-uncommon case of bad debug info.
14540 Don't pollute the addrmap with bad data. */
14541 if (range_beginning
+ baseaddr
== 0
14542 && !per_objfile
->per_bfd
->has_section_at_zero
)
14544 complaint (_(".debug_ranges entry has start address of zero"
14545 " [in module %s]"), objfile_name (objfile
));
14549 callback (range_beginning
, range_end
);
14555 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14556 Return 1 if the attributes are present and valid, otherwise, return 0.
14557 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14560 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14561 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14562 dwarf2_psymtab
*ranges_pst
, dwarf_tag tag
)
14564 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14565 struct gdbarch
*gdbarch
= objfile
->arch ();
14566 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
14569 CORE_ADDR high
= 0;
14572 retval
= dwarf2_ranges_process (offset
, cu
, tag
,
14573 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14575 if (ranges_pst
!= NULL
)
14580 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14581 range_beginning
+ baseaddr
)
14583 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14584 range_end
+ baseaddr
)
14586 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14587 lowpc
, highpc
- 1, ranges_pst
);
14590 /* FIXME: This is recording everything as a low-high
14591 segment of consecutive addresses. We should have a
14592 data structure for discontiguous block ranges
14596 low
= range_beginning
;
14602 if (range_beginning
< low
)
14603 low
= range_beginning
;
14604 if (range_end
> high
)
14612 /* If the first entry is an end-of-list marker, the range
14613 describes an empty scope, i.e. no instructions. */
14619 *high_return
= high
;
14623 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14624 definition for the return value. *LOWPC and *HIGHPC are set iff
14625 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14627 static enum pc_bounds_kind
14628 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14629 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14630 dwarf2_psymtab
*pst
)
14632 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14633 struct attribute
*attr
;
14634 struct attribute
*attr_high
;
14636 CORE_ADDR high
= 0;
14637 enum pc_bounds_kind ret
;
14639 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14642 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14643 if (attr
!= nullptr)
14645 low
= attr
->as_address ();
14646 high
= attr_high
->as_address ();
14647 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14651 /* Found high w/o low attribute. */
14652 return PC_BOUNDS_INVALID
;
14654 /* Found consecutive range of addresses. */
14655 ret
= PC_BOUNDS_HIGH_LOW
;
14659 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14660 if (attr
!= nullptr && attr
->form_is_unsigned ())
14662 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14663 We take advantage of the fact that DW_AT_ranges does not appear
14664 in DW_TAG_compile_unit of DWO files.
14666 Attributes of the form DW_FORM_rnglistx have already had their
14667 value changed by read_rnglist_index and already include
14668 DW_AT_rnglists_base, so don't need to add the ranges base,
14670 int need_ranges_base
= (die
->tag
!= DW_TAG_compile_unit
14671 && attr
->form
!= DW_FORM_rnglistx
);
14672 unsigned int ranges_offset
= (attr
->as_unsigned ()
14673 + (need_ranges_base
14677 /* Value of the DW_AT_ranges attribute is the offset in the
14678 .debug_ranges section. */
14679 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
,
14681 return PC_BOUNDS_INVALID
;
14682 /* Found discontinuous range of addresses. */
14683 ret
= PC_BOUNDS_RANGES
;
14686 return PC_BOUNDS_NOT_PRESENT
;
14689 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14691 return PC_BOUNDS_INVALID
;
14693 /* When using the GNU linker, .gnu.linkonce. sections are used to
14694 eliminate duplicate copies of functions and vtables and such.
14695 The linker will arbitrarily choose one and discard the others.
14696 The AT_*_pc values for such functions refer to local labels in
14697 these sections. If the section from that file was discarded, the
14698 labels are not in the output, so the relocs get a value of 0.
14699 If this is a discarded function, mark the pc bounds as invalid,
14700 so that GDB will ignore it. */
14701 if (low
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
14702 return PC_BOUNDS_INVALID
;
14710 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14711 its low and high PC addresses. Do nothing if these addresses could not
14712 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14713 and HIGHPC to the high address if greater than HIGHPC. */
14716 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14717 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14718 struct dwarf2_cu
*cu
)
14720 CORE_ADDR low
, high
;
14721 struct die_info
*child
= die
->child
;
14723 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14725 *lowpc
= std::min (*lowpc
, low
);
14726 *highpc
= std::max (*highpc
, high
);
14729 /* If the language does not allow nested subprograms (either inside
14730 subprograms or lexical blocks), we're done. */
14731 if (cu
->language
!= language_ada
)
14734 /* Check all the children of the given DIE. If it contains nested
14735 subprograms, then check their pc bounds. Likewise, we need to
14736 check lexical blocks as well, as they may also contain subprogram
14738 while (child
&& child
->tag
)
14740 if (child
->tag
== DW_TAG_subprogram
14741 || child
->tag
== DW_TAG_lexical_block
)
14742 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14743 child
= child
->sibling
;
14747 /* Get the low and high pc's represented by the scope DIE, and store
14748 them in *LOWPC and *HIGHPC. If the correct values can't be
14749 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14752 get_scope_pc_bounds (struct die_info
*die
,
14753 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14754 struct dwarf2_cu
*cu
)
14756 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14757 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14758 CORE_ADDR current_low
, current_high
;
14760 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14761 >= PC_BOUNDS_RANGES
)
14763 best_low
= current_low
;
14764 best_high
= current_high
;
14768 struct die_info
*child
= die
->child
;
14770 while (child
&& child
->tag
)
14772 switch (child
->tag
) {
14773 case DW_TAG_subprogram
:
14774 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14776 case DW_TAG_namespace
:
14777 case DW_TAG_module
:
14778 /* FIXME: carlton/2004-01-16: Should we do this for
14779 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14780 that current GCC's always emit the DIEs corresponding
14781 to definitions of methods of classes as children of a
14782 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14783 the DIEs giving the declarations, which could be
14784 anywhere). But I don't see any reason why the
14785 standards says that they have to be there. */
14786 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14788 if (current_low
!= ((CORE_ADDR
) -1))
14790 best_low
= std::min (best_low
, current_low
);
14791 best_high
= std::max (best_high
, current_high
);
14799 child
= child
->sibling
;
14804 *highpc
= best_high
;
14807 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14811 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14812 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14814 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14815 struct gdbarch
*gdbarch
= objfile
->arch ();
14816 struct attribute
*attr
;
14817 struct attribute
*attr_high
;
14819 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14822 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14823 if (attr
!= nullptr)
14825 CORE_ADDR low
= attr
->as_address ();
14826 CORE_ADDR high
= attr_high
->as_address ();
14828 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14831 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14832 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14833 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14837 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14838 if (attr
!= nullptr && attr
->form_is_unsigned ())
14840 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14841 We take advantage of the fact that DW_AT_ranges does not appear
14842 in DW_TAG_compile_unit of DWO files.
14844 Attributes of the form DW_FORM_rnglistx have already had their
14845 value changed by read_rnglist_index and already include
14846 DW_AT_rnglists_base, so don't need to add the ranges base,
14848 int need_ranges_base
= (die
->tag
!= DW_TAG_compile_unit
14849 && attr
->form
!= DW_FORM_rnglistx
);
14851 /* The value of the DW_AT_ranges attribute is the offset of the
14852 address range list in the .debug_ranges section. */
14853 unsigned long offset
= (attr
->as_unsigned ()
14854 + (need_ranges_base
? cu
->ranges_base
: 0));
14856 std::vector
<blockrange
> blockvec
;
14857 dwarf2_ranges_process (offset
, cu
, die
->tag
,
14858 [&] (CORE_ADDR start
, CORE_ADDR end
)
14862 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14863 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14864 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14865 blockvec
.emplace_back (start
, end
);
14868 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14872 /* Check whether the producer field indicates either of GCC < 4.6, or the
14873 Intel C/C++ compiler, and cache the result in CU. */
14876 check_producer (struct dwarf2_cu
*cu
)
14880 if (cu
->producer
== NULL
)
14882 /* For unknown compilers expect their behavior is DWARF version
14885 GCC started to support .debug_types sections by -gdwarf-4 since
14886 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14887 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14888 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14889 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14891 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14893 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14894 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14896 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14898 cu
->producer_is_icc
= true;
14899 cu
->producer_is_icc_lt_14
= major
< 14;
14901 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14902 cu
->producer_is_codewarrior
= true;
14905 /* For other non-GCC compilers, expect their behavior is DWARF version
14909 cu
->checked_producer
= true;
14912 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14913 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14914 during 4.6.0 experimental. */
14917 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14919 if (!cu
->checked_producer
)
14920 check_producer (cu
);
14922 return cu
->producer_is_gxx_lt_4_6
;
14926 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14927 with incorrect is_stmt attributes. */
14930 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14932 if (!cu
->checked_producer
)
14933 check_producer (cu
);
14935 return cu
->producer_is_codewarrior
;
14938 /* Return the accessibility of DIE, as given by DW_AT_accessibility.
14939 If that attribute is not available, return the appropriate
14942 static enum dwarf_access_attribute
14943 dwarf2_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14945 attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14946 if (attr
!= nullptr)
14948 LONGEST value
= attr
->constant_value (-1);
14949 if (value
== DW_ACCESS_public
14950 || value
== DW_ACCESS_protected
14951 || value
== DW_ACCESS_private
)
14952 return (dwarf_access_attribute
) value
;
14953 complaint (_("Unhandled DW_AT_accessibility value (%s)"),
14957 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14959 /* The default DWARF 2 accessibility for members is public, the default
14960 accessibility for inheritance is private. */
14962 if (die
->tag
!= DW_TAG_inheritance
)
14963 return DW_ACCESS_public
;
14965 return DW_ACCESS_private
;
14969 /* DWARF 3+ defines the default accessibility a different way. The same
14970 rules apply now for DW_TAG_inheritance as for the members and it only
14971 depends on the container kind. */
14973 if (die
->parent
->tag
== DW_TAG_class_type
)
14974 return DW_ACCESS_private
;
14976 return DW_ACCESS_public
;
14980 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14981 offset. If the attribute was not found return 0, otherwise return
14982 1. If it was found but could not properly be handled, set *OFFSET
14986 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14989 struct attribute
*attr
;
14991 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14996 /* Note that we do not check for a section offset first here.
14997 This is because DW_AT_data_member_location is new in DWARF 4,
14998 so if we see it, we can assume that a constant form is really
14999 a constant and not a section offset. */
15000 if (attr
->form_is_constant ())
15001 *offset
= attr
->constant_value (0);
15002 else if (attr
->form_is_section_offset ())
15003 dwarf2_complex_location_expr_complaint ();
15004 else if (attr
->form_is_block ())
15005 *offset
= decode_locdesc (attr
->as_block (), cu
);
15007 dwarf2_complex_location_expr_complaint ();
15015 /* Look for DW_AT_data_member_location and store the results in FIELD. */
15018 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
15019 struct field
*field
)
15021 struct attribute
*attr
;
15023 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
15026 if (attr
->form_is_constant ())
15028 LONGEST offset
= attr
->constant_value (0);
15029 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
15031 else if (attr
->form_is_section_offset ())
15032 dwarf2_complex_location_expr_complaint ();
15033 else if (attr
->form_is_block ())
15036 CORE_ADDR offset
= decode_locdesc (attr
->as_block (), cu
, &handled
);
15038 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
15041 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
15042 struct objfile
*objfile
= per_objfile
->objfile
;
15043 struct dwarf2_locexpr_baton
*dlbaton
15044 = XOBNEW (&objfile
->objfile_obstack
,
15045 struct dwarf2_locexpr_baton
);
15046 dlbaton
->data
= attr
->as_block ()->data
;
15047 dlbaton
->size
= attr
->as_block ()->size
;
15048 /* When using this baton, we want to compute the address
15049 of the field, not the value. This is why
15050 is_reference is set to false here. */
15051 dlbaton
->is_reference
= false;
15052 dlbaton
->per_objfile
= per_objfile
;
15053 dlbaton
->per_cu
= cu
->per_cu
;
15055 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
15059 dwarf2_complex_location_expr_complaint ();
15063 /* Add an aggregate field to the field list. */
15066 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15067 struct dwarf2_cu
*cu
)
15069 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15070 struct gdbarch
*gdbarch
= objfile
->arch ();
15071 struct nextfield
*new_field
;
15072 struct attribute
*attr
;
15074 const char *fieldname
= "";
15076 if (die
->tag
== DW_TAG_inheritance
)
15078 fip
->baseclasses
.emplace_back ();
15079 new_field
= &fip
->baseclasses
.back ();
15083 fip
->fields
.emplace_back ();
15084 new_field
= &fip
->fields
.back ();
15087 new_field
->offset
= die
->sect_off
;
15089 new_field
->accessibility
= dwarf2_access_attribute (die
, cu
);
15090 if (new_field
->accessibility
!= DW_ACCESS_public
)
15091 fip
->non_public_fields
= true;
15093 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15094 if (attr
!= nullptr)
15095 new_field
->virtuality
= attr
->as_virtuality ();
15097 new_field
->virtuality
= DW_VIRTUALITY_none
;
15099 fp
= &new_field
->field
;
15101 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15103 /* Data member other than a C++ static data member. */
15105 /* Get type of field. */
15106 fp
->set_type (die_type (die
, cu
));
15108 SET_FIELD_BITPOS (*fp
, 0);
15110 /* Get bit size of field (zero if none). */
15111 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15112 if (attr
!= nullptr)
15114 FIELD_BITSIZE (*fp
) = attr
->constant_value (0);
15118 FIELD_BITSIZE (*fp
) = 0;
15121 /* Get bit offset of field. */
15122 handle_data_member_location (die
, cu
, fp
);
15123 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15124 if (attr
!= nullptr && attr
->form_is_constant ())
15126 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
15128 /* For big endian bits, the DW_AT_bit_offset gives the
15129 additional bit offset from the MSB of the containing
15130 anonymous object to the MSB of the field. We don't
15131 have to do anything special since we don't need to
15132 know the size of the anonymous object. */
15133 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15134 + attr
->constant_value (0)));
15138 /* For little endian bits, compute the bit offset to the
15139 MSB of the anonymous object, subtract off the number of
15140 bits from the MSB of the field to the MSB of the
15141 object, and then subtract off the number of bits of
15142 the field itself. The result is the bit offset of
15143 the LSB of the field. */
15144 int anonymous_size
;
15145 int bit_offset
= attr
->constant_value (0);
15147 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15148 if (attr
!= nullptr && attr
->form_is_constant ())
15150 /* The size of the anonymous object containing
15151 the bit field is explicit, so use the
15152 indicated size (in bytes). */
15153 anonymous_size
= attr
->constant_value (0);
15157 /* The size of the anonymous object containing
15158 the bit field must be inferred from the type
15159 attribute of the data member containing the
15161 anonymous_size
= TYPE_LENGTH (fp
->type ());
15163 SET_FIELD_BITPOS (*fp
,
15164 (FIELD_BITPOS (*fp
)
15165 + anonymous_size
* bits_per_byte
15166 - bit_offset
- FIELD_BITSIZE (*fp
)));
15169 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15171 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15172 + attr
->constant_value (0)));
15174 /* Get name of field. */
15175 fieldname
= dwarf2_name (die
, cu
);
15176 if (fieldname
== NULL
)
15179 /* The name is already allocated along with this objfile, so we don't
15180 need to duplicate it for the type. */
15181 fp
->name
= fieldname
;
15183 /* Change accessibility for artificial fields (e.g. virtual table
15184 pointer or virtual base class pointer) to private. */
15185 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15187 FIELD_ARTIFICIAL (*fp
) = 1;
15188 new_field
->accessibility
= DW_ACCESS_private
;
15189 fip
->non_public_fields
= true;
15192 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15194 /* C++ static member. */
15196 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15197 is a declaration, but all versions of G++ as of this writing
15198 (so through at least 3.2.1) incorrectly generate
15199 DW_TAG_variable tags. */
15201 const char *physname
;
15203 /* Get name of field. */
15204 fieldname
= dwarf2_name (die
, cu
);
15205 if (fieldname
== NULL
)
15208 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15210 /* Only create a symbol if this is an external value.
15211 new_symbol checks this and puts the value in the global symbol
15212 table, which we want. If it is not external, new_symbol
15213 will try to put the value in cu->list_in_scope which is wrong. */
15214 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15216 /* A static const member, not much different than an enum as far as
15217 we're concerned, except that we can support more types. */
15218 new_symbol (die
, NULL
, cu
);
15221 /* Get physical name. */
15222 physname
= dwarf2_physname (fieldname
, die
, cu
);
15224 /* The name is already allocated along with this objfile, so we don't
15225 need to duplicate it for the type. */
15226 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15227 fp
->set_type (die_type (die
, cu
));
15228 FIELD_NAME (*fp
) = fieldname
;
15230 else if (die
->tag
== DW_TAG_inheritance
)
15232 /* C++ base class field. */
15233 handle_data_member_location (die
, cu
, fp
);
15234 FIELD_BITSIZE (*fp
) = 0;
15235 fp
->set_type (die_type (die
, cu
));
15236 FIELD_NAME (*fp
) = fp
->type ()->name ();
15239 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15242 /* Can the type given by DIE define another type? */
15245 type_can_define_types (const struct die_info
*die
)
15249 case DW_TAG_typedef
:
15250 case DW_TAG_class_type
:
15251 case DW_TAG_structure_type
:
15252 case DW_TAG_union_type
:
15253 case DW_TAG_enumeration_type
:
15261 /* Add a type definition defined in the scope of the FIP's class. */
15264 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15265 struct dwarf2_cu
*cu
)
15267 struct decl_field fp
;
15268 memset (&fp
, 0, sizeof (fp
));
15270 gdb_assert (type_can_define_types (die
));
15272 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15273 fp
.name
= dwarf2_name (die
, cu
);
15274 fp
.type
= read_type_die (die
, cu
);
15276 /* Save accessibility. */
15277 dwarf_access_attribute accessibility
= dwarf2_access_attribute (die
, cu
);
15278 switch (accessibility
)
15280 case DW_ACCESS_public
:
15281 /* The assumed value if neither private nor protected. */
15283 case DW_ACCESS_private
:
15286 case DW_ACCESS_protected
:
15287 fp
.is_protected
= 1;
15291 if (die
->tag
== DW_TAG_typedef
)
15292 fip
->typedef_field_list
.push_back (fp
);
15294 fip
->nested_types_list
.push_back (fp
);
15297 /* A convenience typedef that's used when finding the discriminant
15298 field for a variant part. */
15299 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
15302 /* Compute the discriminant range for a given variant. OBSTACK is
15303 where the results will be stored. VARIANT is the variant to
15304 process. IS_UNSIGNED indicates whether the discriminant is signed
15307 static const gdb::array_view
<discriminant_range
>
15308 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
15311 std::vector
<discriminant_range
> ranges
;
15313 if (variant
.default_branch
)
15316 if (variant
.discr_list_data
== nullptr)
15318 discriminant_range r
15319 = {variant
.discriminant_value
, variant
.discriminant_value
};
15320 ranges
.push_back (r
);
15324 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
15325 variant
.discr_list_data
->size
);
15326 while (!data
.empty ())
15328 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
15330 complaint (_("invalid discriminant marker: %d"), data
[0]);
15333 bool is_range
= data
[0] == DW_DSC_range
;
15334 data
= data
.slice (1);
15336 ULONGEST low
, high
;
15337 unsigned int bytes_read
;
15341 complaint (_("DW_AT_discr_list missing low value"));
15345 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
15347 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
15349 data
= data
.slice (bytes_read
);
15355 complaint (_("DW_AT_discr_list missing high value"));
15359 high
= read_unsigned_leb128 (nullptr, data
.data (),
15362 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
15364 data
= data
.slice (bytes_read
);
15369 ranges
.push_back ({ low
, high
});
15373 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
15375 std::copy (ranges
.begin (), ranges
.end (), result
);
15376 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
15379 static const gdb::array_view
<variant_part
> create_variant_parts
15380 (struct obstack
*obstack
,
15381 const offset_map_type
&offset_map
,
15382 struct field_info
*fi
,
15383 const std::vector
<variant_part_builder
> &variant_parts
);
15385 /* Fill in a "struct variant" for a given variant field. RESULT is
15386 the variant to fill in. OBSTACK is where any needed allocations
15387 will be done. OFFSET_MAP holds the mapping from section offsets to
15388 fields for the type. FI describes the fields of the type we're
15389 processing. FIELD is the variant field we're converting. */
15392 create_one_variant (variant
&result
, struct obstack
*obstack
,
15393 const offset_map_type
&offset_map
,
15394 struct field_info
*fi
, const variant_field
&field
)
15396 result
.discriminants
= convert_variant_range (obstack
, field
, false);
15397 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
15398 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
15399 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
15400 field
.variant_parts
);
15403 /* Fill in a "struct variant_part" for a given variant part. RESULT
15404 is the variant part to fill in. OBSTACK is where any needed
15405 allocations will be done. OFFSET_MAP holds the mapping from
15406 section offsets to fields for the type. FI describes the fields of
15407 the type we're processing. BUILDER is the variant part to be
15411 create_one_variant_part (variant_part
&result
,
15412 struct obstack
*obstack
,
15413 const offset_map_type
&offset_map
,
15414 struct field_info
*fi
,
15415 const variant_part_builder
&builder
)
15417 auto iter
= offset_map
.find (builder
.discriminant_offset
);
15418 if (iter
== offset_map
.end ())
15420 result
.discriminant_index
= -1;
15421 /* Doesn't matter. */
15422 result
.is_unsigned
= false;
15426 result
.discriminant_index
= iter
->second
;
15428 = fi
->fields
[result
.discriminant_index
].field
.type ()->is_unsigned ();
15431 size_t n
= builder
.variants
.size ();
15432 variant
*output
= new (obstack
) variant
[n
];
15433 for (size_t i
= 0; i
< n
; ++i
)
15434 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
15435 builder
.variants
[i
]);
15437 result
.variants
= gdb::array_view
<variant
> (output
, n
);
15440 /* Create a vector of variant parts that can be attached to a type.
15441 OBSTACK is where any needed allocations will be done. OFFSET_MAP
15442 holds the mapping from section offsets to fields for the type. FI
15443 describes the fields of the type we're processing. VARIANT_PARTS
15444 is the vector to convert. */
15446 static const gdb::array_view
<variant_part
>
15447 create_variant_parts (struct obstack
*obstack
,
15448 const offset_map_type
&offset_map
,
15449 struct field_info
*fi
,
15450 const std::vector
<variant_part_builder
> &variant_parts
)
15452 if (variant_parts
.empty ())
15455 size_t n
= variant_parts
.size ();
15456 variant_part
*result
= new (obstack
) variant_part
[n
];
15457 for (size_t i
= 0; i
< n
; ++i
)
15458 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
15461 return gdb::array_view
<variant_part
> (result
, n
);
15464 /* Compute the variant part vector for FIP, attaching it to TYPE when
15468 add_variant_property (struct field_info
*fip
, struct type
*type
,
15469 struct dwarf2_cu
*cu
)
15471 /* Map section offsets of fields to their field index. Note the
15472 field index here does not take the number of baseclasses into
15474 offset_map_type offset_map
;
15475 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
15476 offset_map
[fip
->fields
[i
].offset
] = i
;
15478 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15479 gdb::array_view
<variant_part
> parts
15480 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
15481 fip
->variant_parts
);
15483 struct dynamic_prop prop
;
15484 prop
.set_variant_parts ((gdb::array_view
<variant_part
> *)
15485 obstack_copy (&objfile
->objfile_obstack
, &parts
,
15488 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
15491 /* Create the vector of fields, and attach it to the type. */
15494 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15495 struct dwarf2_cu
*cu
)
15497 int nfields
= fip
->nfields ();
15499 /* Record the field count, allocate space for the array of fields,
15500 and create blank accessibility bitfields if necessary. */
15501 type
->set_num_fields (nfields
);
15503 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
15505 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15507 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15509 TYPE_FIELD_PRIVATE_BITS (type
) =
15510 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15511 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15513 TYPE_FIELD_PROTECTED_BITS (type
) =
15514 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15515 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15517 TYPE_FIELD_IGNORE_BITS (type
) =
15518 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15519 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15522 /* If the type has baseclasses, allocate and clear a bit vector for
15523 TYPE_FIELD_VIRTUAL_BITS. */
15524 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15526 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15527 unsigned char *pointer
;
15529 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15530 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15531 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15532 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15533 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15536 if (!fip
->variant_parts
.empty ())
15537 add_variant_property (fip
, type
, cu
);
15539 /* Copy the saved-up fields into the field vector. */
15540 for (int i
= 0; i
< nfields
; ++i
)
15542 struct nextfield
&field
15543 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15544 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15546 type
->field (i
) = field
.field
;
15547 switch (field
.accessibility
)
15549 case DW_ACCESS_private
:
15550 if (cu
->language
!= language_ada
)
15551 SET_TYPE_FIELD_PRIVATE (type
, i
);
15554 case DW_ACCESS_protected
:
15555 if (cu
->language
!= language_ada
)
15556 SET_TYPE_FIELD_PROTECTED (type
, i
);
15559 case DW_ACCESS_public
:
15563 /* Unknown accessibility. Complain and treat it as public. */
15565 complaint (_("unsupported accessibility %d"),
15566 field
.accessibility
);
15570 if (i
< fip
->baseclasses
.size ())
15572 switch (field
.virtuality
)
15574 case DW_VIRTUALITY_virtual
:
15575 case DW_VIRTUALITY_pure_virtual
:
15576 if (cu
->language
== language_ada
)
15577 error (_("unexpected virtuality in component of Ada type"));
15578 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15585 /* Return true if this member function is a constructor, false
15589 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15591 const char *fieldname
;
15592 const char *type_name
;
15595 if (die
->parent
== NULL
)
15598 if (die
->parent
->tag
!= DW_TAG_structure_type
15599 && die
->parent
->tag
!= DW_TAG_union_type
15600 && die
->parent
->tag
!= DW_TAG_class_type
)
15603 fieldname
= dwarf2_name (die
, cu
);
15604 type_name
= dwarf2_name (die
->parent
, cu
);
15605 if (fieldname
== NULL
|| type_name
== NULL
)
15608 len
= strlen (fieldname
);
15609 return (strncmp (fieldname
, type_name
, len
) == 0
15610 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15613 /* Add a member function to the proper fieldlist. */
15616 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15617 struct type
*type
, struct dwarf2_cu
*cu
)
15619 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15620 struct attribute
*attr
;
15622 struct fnfieldlist
*flp
= nullptr;
15623 struct fn_field
*fnp
;
15624 const char *fieldname
;
15625 struct type
*this_type
;
15627 if (cu
->language
== language_ada
)
15628 error (_("unexpected member function in Ada type"));
15630 /* Get name of member function. */
15631 fieldname
= dwarf2_name (die
, cu
);
15632 if (fieldname
== NULL
)
15635 /* Look up member function name in fieldlist. */
15636 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15638 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15640 flp
= &fip
->fnfieldlists
[i
];
15645 /* Create a new fnfieldlist if necessary. */
15646 if (flp
== nullptr)
15648 fip
->fnfieldlists
.emplace_back ();
15649 flp
= &fip
->fnfieldlists
.back ();
15650 flp
->name
= fieldname
;
15651 i
= fip
->fnfieldlists
.size () - 1;
15654 /* Create a new member function field and add it to the vector of
15656 flp
->fnfields
.emplace_back ();
15657 fnp
= &flp
->fnfields
.back ();
15659 /* Delay processing of the physname until later. */
15660 if (cu
->language
== language_cplus
)
15661 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15665 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15666 fnp
->physname
= physname
? physname
: "";
15669 fnp
->type
= alloc_type (objfile
);
15670 this_type
= read_type_die (die
, cu
);
15671 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
15673 int nparams
= this_type
->num_fields ();
15675 /* TYPE is the domain of this method, and THIS_TYPE is the type
15676 of the method itself (TYPE_CODE_METHOD). */
15677 smash_to_method_type (fnp
->type
, type
,
15678 TYPE_TARGET_TYPE (this_type
),
15679 this_type
->fields (),
15680 this_type
->num_fields (),
15681 this_type
->has_varargs ());
15683 /* Handle static member functions.
15684 Dwarf2 has no clean way to discern C++ static and non-static
15685 member functions. G++ helps GDB by marking the first
15686 parameter for non-static member functions (which is the this
15687 pointer) as artificial. We obtain this information from
15688 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15689 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15690 fnp
->voffset
= VOFFSET_STATIC
;
15693 complaint (_("member function type missing for '%s'"),
15694 dwarf2_full_name (fieldname
, die
, cu
));
15696 /* Get fcontext from DW_AT_containing_type if present. */
15697 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15698 fnp
->fcontext
= die_containing_type (die
, cu
);
15700 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15701 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15703 /* Get accessibility. */
15704 dwarf_access_attribute accessibility
= dwarf2_access_attribute (die
, cu
);
15705 switch (accessibility
)
15707 case DW_ACCESS_private
:
15708 fnp
->is_private
= 1;
15710 case DW_ACCESS_protected
:
15711 fnp
->is_protected
= 1;
15715 /* Check for artificial methods. */
15716 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15717 if (attr
&& attr
->as_boolean ())
15718 fnp
->is_artificial
= 1;
15720 /* Check for defaulted methods. */
15721 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15722 if (attr
!= nullptr)
15723 fnp
->defaulted
= attr
->defaulted ();
15725 /* Check for deleted methods. */
15726 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15727 if (attr
!= nullptr && attr
->as_boolean ())
15728 fnp
->is_deleted
= 1;
15730 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15732 /* Get index in virtual function table if it is a virtual member
15733 function. For older versions of GCC, this is an offset in the
15734 appropriate virtual table, as specified by DW_AT_containing_type.
15735 For everyone else, it is an expression to be evaluated relative
15736 to the object address. */
15738 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15739 if (attr
!= nullptr)
15741 if (attr
->form_is_block () && attr
->as_block ()->size
> 0)
15743 struct dwarf_block
*block
= attr
->as_block ();
15745 if (block
->data
[0] == DW_OP_constu
)
15747 /* Old-style GCC. */
15748 fnp
->voffset
= decode_locdesc (block
, cu
) + 2;
15750 else if (block
->data
[0] == DW_OP_deref
15751 || (block
->size
> 1
15752 && block
->data
[0] == DW_OP_deref_size
15753 && block
->data
[1] == cu
->header
.addr_size
))
15755 fnp
->voffset
= decode_locdesc (block
, cu
);
15756 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15757 dwarf2_complex_location_expr_complaint ();
15759 fnp
->voffset
/= cu
->header
.addr_size
;
15763 dwarf2_complex_location_expr_complaint ();
15765 if (!fnp
->fcontext
)
15767 /* If there is no `this' field and no DW_AT_containing_type,
15768 we cannot actually find a base class context for the
15770 if (this_type
->num_fields () == 0
15771 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15773 complaint (_("cannot determine context for virtual member "
15774 "function \"%s\" (offset %s)"),
15775 fieldname
, sect_offset_str (die
->sect_off
));
15780 = TYPE_TARGET_TYPE (this_type
->field (0).type ());
15784 else if (attr
->form_is_section_offset ())
15786 dwarf2_complex_location_expr_complaint ();
15790 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15796 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15797 if (attr
!= nullptr && attr
->as_virtuality () != DW_VIRTUALITY_none
)
15799 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15800 complaint (_("Member function \"%s\" (offset %s) is virtual "
15801 "but the vtable offset is not specified"),
15802 fieldname
, sect_offset_str (die
->sect_off
));
15803 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15804 TYPE_CPLUS_DYNAMIC (type
) = 1;
15809 /* Create the vector of member function fields, and attach it to the type. */
15812 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15813 struct dwarf2_cu
*cu
)
15815 if (cu
->language
== language_ada
)
15816 error (_("unexpected member functions in Ada type"));
15818 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15819 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15821 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15823 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15825 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15826 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15828 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15829 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15830 fn_flp
->fn_fields
= (struct fn_field
*)
15831 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15833 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15834 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15837 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15840 /* Returns non-zero if NAME is the name of a vtable member in CU's
15841 language, zero otherwise. */
15843 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15845 static const char vptr
[] = "_vptr";
15847 /* Look for the C++ form of the vtable. */
15848 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15854 /* GCC outputs unnamed structures that are really pointers to member
15855 functions, with the ABI-specified layout. If TYPE describes
15856 such a structure, smash it into a member function type.
15858 GCC shouldn't do this; it should just output pointer to member DIEs.
15859 This is GCC PR debug/28767. */
15862 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15864 struct type
*pfn_type
, *self_type
, *new_type
;
15866 /* Check for a structure with no name and two children. */
15867 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15870 /* Check for __pfn and __delta members. */
15871 if (TYPE_FIELD_NAME (type
, 0) == NULL
15872 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15873 || TYPE_FIELD_NAME (type
, 1) == NULL
15874 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15877 /* Find the type of the method. */
15878 pfn_type
= type
->field (0).type ();
15879 if (pfn_type
== NULL
15880 || pfn_type
->code () != TYPE_CODE_PTR
15881 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15884 /* Look for the "this" argument. */
15885 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15886 if (pfn_type
->num_fields () == 0
15887 /* || pfn_type->field (0).type () == NULL */
15888 || pfn_type
->field (0).type ()->code () != TYPE_CODE_PTR
)
15891 self_type
= TYPE_TARGET_TYPE (pfn_type
->field (0).type ());
15892 new_type
= alloc_type (objfile
);
15893 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15894 pfn_type
->fields (), pfn_type
->num_fields (),
15895 pfn_type
->has_varargs ());
15896 smash_to_methodptr_type (type
, new_type
);
15899 /* Helper for quirk_ada_thick_pointer. If TYPE is an array type that
15900 requires rewriting, then copy it and return the updated copy.
15901 Otherwise return nullptr. */
15903 static struct type
*
15904 rewrite_array_type (struct type
*type
)
15906 if (type
->code () != TYPE_CODE_ARRAY
)
15909 struct type
*index_type
= type
->index_type ();
15910 range_bounds
*current_bounds
= index_type
->bounds ();
15912 /* Handle multi-dimensional arrays. */
15913 struct type
*new_target
= rewrite_array_type (TYPE_TARGET_TYPE (type
));
15914 if (new_target
== nullptr)
15916 /* Maybe we don't need to rewrite this array. */
15917 if (current_bounds
->low
.kind () == PROP_CONST
15918 && current_bounds
->high
.kind () == PROP_CONST
)
15922 /* Either the target type was rewritten, or the bounds have to be
15923 updated. Either way we want to copy the type and update
15925 struct type
*copy
= copy_type (type
);
15926 int nfields
= copy
->num_fields ();
15928 = ((struct field
*) TYPE_ZALLOC (copy
,
15929 nfields
* sizeof (struct field
)));
15930 memcpy (new_fields
, copy
->fields (), nfields
* sizeof (struct field
));
15931 copy
->set_fields (new_fields
);
15932 if (new_target
!= nullptr)
15933 TYPE_TARGET_TYPE (copy
) = new_target
;
15935 struct type
*index_copy
= copy_type (index_type
);
15936 range_bounds
*bounds
15937 = (struct range_bounds
*) TYPE_ZALLOC (index_copy
,
15938 sizeof (range_bounds
));
15939 *bounds
= *current_bounds
;
15940 bounds
->low
.set_const_val (1);
15941 bounds
->high
.set_const_val (0);
15942 index_copy
->set_bounds (bounds
);
15943 copy
->set_index_type (index_copy
);
15948 /* While some versions of GCC will generate complicated DWARF for an
15949 array (see quirk_ada_thick_pointer), more recent versions were
15950 modified to emit an explicit thick pointer structure. However, in
15951 this case, the array still has DWARF expressions for its ranges,
15952 and these must be ignored. */
15955 quirk_ada_thick_pointer_struct (struct die_info
*die
, struct dwarf2_cu
*cu
,
15958 gdb_assert (cu
->language
== language_ada
);
15960 /* Check for a structure with two children. */
15961 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15964 /* Check for P_ARRAY and P_BOUNDS members. */
15965 if (TYPE_FIELD_NAME (type
, 0) == NULL
15966 || strcmp (TYPE_FIELD_NAME (type
, 0), "P_ARRAY") != 0
15967 || TYPE_FIELD_NAME (type
, 1) == NULL
15968 || strcmp (TYPE_FIELD_NAME (type
, 1), "P_BOUNDS") != 0)
15971 /* Make sure we're looking at a pointer to an array. */
15972 if (type
->field (0).type ()->code () != TYPE_CODE_PTR
)
15975 /* The Ada code already knows how to handle these types, so all that
15976 we need to do is turn the bounds into static bounds. However, we
15977 don't want to rewrite existing array or index types in-place,
15978 because those may be referenced in other contexts where this
15979 rewriting is undesirable. */
15980 struct type
*new_ary_type
15981 = rewrite_array_type (TYPE_TARGET_TYPE (type
->field (0).type ()));
15982 if (new_ary_type
!= nullptr)
15983 type
->field (0).set_type (lookup_pointer_type (new_ary_type
));
15986 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15987 appropriate error checking and issuing complaints if there is a
15991 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15993 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15995 if (attr
== nullptr)
15998 if (!attr
->form_is_constant ())
16000 complaint (_("DW_AT_alignment must have constant form"
16001 " - DIE at %s [in module %s]"),
16002 sect_offset_str (die
->sect_off
),
16003 objfile_name (cu
->per_objfile
->objfile
));
16007 LONGEST val
= attr
->constant_value (0);
16010 complaint (_("DW_AT_alignment value must not be negative"
16011 " - DIE at %s [in module %s]"),
16012 sect_offset_str (die
->sect_off
),
16013 objfile_name (cu
->per_objfile
->objfile
));
16016 ULONGEST align
= val
;
16020 complaint (_("DW_AT_alignment value must not be zero"
16021 " - DIE at %s [in module %s]"),
16022 sect_offset_str (die
->sect_off
),
16023 objfile_name (cu
->per_objfile
->objfile
));
16026 if ((align
& (align
- 1)) != 0)
16028 complaint (_("DW_AT_alignment value must be a power of 2"
16029 " - DIE at %s [in module %s]"),
16030 sect_offset_str (die
->sect_off
),
16031 objfile_name (cu
->per_objfile
->objfile
));
16038 /* If the DIE has a DW_AT_alignment attribute, use its value to set
16039 the alignment for TYPE. */
16042 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
16045 if (!set_type_align (type
, get_alignment (cu
, die
)))
16046 complaint (_("DW_AT_alignment value too large"
16047 " - DIE at %s [in module %s]"),
16048 sect_offset_str (die
->sect_off
),
16049 objfile_name (cu
->per_objfile
->objfile
));
16052 /* Check if the given VALUE is a valid enum dwarf_calling_convention
16053 constant for a type, according to DWARF5 spec, Table 5.5. */
16056 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
16061 case DW_CC_pass_by_reference
:
16062 case DW_CC_pass_by_value
:
16066 complaint (_("unrecognized DW_AT_calling_convention value "
16067 "(%s) for a type"), pulongest (value
));
16072 /* Check if the given VALUE is a valid enum dwarf_calling_convention
16073 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
16074 also according to GNU-specific values (see include/dwarf2.h). */
16077 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
16082 case DW_CC_program
:
16086 case DW_CC_GNU_renesas_sh
:
16087 case DW_CC_GNU_borland_fastcall_i386
:
16088 case DW_CC_GDB_IBM_OpenCL
:
16092 complaint (_("unrecognized DW_AT_calling_convention value "
16093 "(%s) for a subroutine"), pulongest (value
));
16098 /* Called when we find the DIE that starts a structure or union scope
16099 (definition) to create a type for the structure or union. Fill in
16100 the type's name and general properties; the members will not be
16101 processed until process_structure_scope. A symbol table entry for
16102 the type will also not be done until process_structure_scope (assuming
16103 the type has a name).
16105 NOTE: we need to call these functions regardless of whether or not the
16106 DIE has a DW_AT_name attribute, since it might be an anonymous
16107 structure or union. This gets the type entered into our set of
16108 user defined types. */
16110 static struct type
*
16111 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16113 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16115 struct attribute
*attr
;
16118 /* If the definition of this type lives in .debug_types, read that type.
16119 Don't follow DW_AT_specification though, that will take us back up
16120 the chain and we want to go down. */
16121 attr
= die
->attr (DW_AT_signature
);
16122 if (attr
!= nullptr)
16124 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16126 /* The type's CU may not be the same as CU.
16127 Ensure TYPE is recorded with CU in die_type_hash. */
16128 return set_die_type (die
, type
, cu
);
16131 type
= alloc_type (objfile
);
16132 INIT_CPLUS_SPECIFIC (type
);
16134 name
= dwarf2_name (die
, cu
);
16137 if (cu
->language
== language_cplus
16138 || cu
->language
== language_d
16139 || cu
->language
== language_rust
)
16141 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
16143 /* dwarf2_full_name might have already finished building the DIE's
16144 type. If so, there is no need to continue. */
16145 if (get_die_type (die
, cu
) != NULL
)
16146 return get_die_type (die
, cu
);
16148 type
->set_name (full_name
);
16152 /* The name is already allocated along with this objfile, so
16153 we don't need to duplicate it for the type. */
16154 type
->set_name (name
);
16158 if (die
->tag
== DW_TAG_structure_type
)
16160 type
->set_code (TYPE_CODE_STRUCT
);
16162 else if (die
->tag
== DW_TAG_union_type
)
16164 type
->set_code (TYPE_CODE_UNION
);
16168 type
->set_code (TYPE_CODE_STRUCT
);
16171 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
16172 TYPE_DECLARED_CLASS (type
) = 1;
16174 /* Store the calling convention in the type if it's available in
16175 the die. Otherwise the calling convention remains set to
16176 the default value DW_CC_normal. */
16177 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16178 if (attr
!= nullptr
16179 && is_valid_DW_AT_calling_convention_for_type (attr
->constant_value (0)))
16181 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16182 TYPE_CPLUS_CALLING_CONVENTION (type
)
16183 = (enum dwarf_calling_convention
) (attr
->constant_value (0));
16186 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16187 if (attr
!= nullptr)
16189 if (attr
->form_is_constant ())
16190 TYPE_LENGTH (type
) = attr
->constant_value (0);
16193 struct dynamic_prop prop
;
16194 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
16195 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
16196 TYPE_LENGTH (type
) = 0;
16201 TYPE_LENGTH (type
) = 0;
16204 maybe_set_alignment (cu
, die
, type
);
16206 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
16208 /* ICC<14 does not output the required DW_AT_declaration on
16209 incomplete types, but gives them a size of zero. */
16210 type
->set_is_stub (true);
16213 type
->set_stub_is_supported (true);
16215 if (die_is_declaration (die
, cu
))
16216 type
->set_is_stub (true);
16217 else if (attr
== NULL
&& die
->child
== NULL
16218 && producer_is_realview (cu
->producer
))
16219 /* RealView does not output the required DW_AT_declaration
16220 on incomplete types. */
16221 type
->set_is_stub (true);
16223 /* We need to add the type field to the die immediately so we don't
16224 infinitely recurse when dealing with pointers to the structure
16225 type within the structure itself. */
16226 set_die_type (die
, type
, cu
);
16228 /* set_die_type should be already done. */
16229 set_descriptive_type (type
, die
, cu
);
16234 static void handle_struct_member_die
16235 (struct die_info
*child_die
,
16237 struct field_info
*fi
,
16238 std::vector
<struct symbol
*> *template_args
,
16239 struct dwarf2_cu
*cu
);
16241 /* A helper for handle_struct_member_die that handles
16242 DW_TAG_variant_part. */
16245 handle_variant_part (struct die_info
*die
, struct type
*type
,
16246 struct field_info
*fi
,
16247 std::vector
<struct symbol
*> *template_args
,
16248 struct dwarf2_cu
*cu
)
16250 variant_part_builder
*new_part
;
16251 if (fi
->current_variant_part
== nullptr)
16253 fi
->variant_parts
.emplace_back ();
16254 new_part
= &fi
->variant_parts
.back ();
16256 else if (!fi
->current_variant_part
->processing_variant
)
16258 complaint (_("nested DW_TAG_variant_part seen "
16259 "- DIE at %s [in module %s]"),
16260 sect_offset_str (die
->sect_off
),
16261 objfile_name (cu
->per_objfile
->objfile
));
16266 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
16267 current
.variant_parts
.emplace_back ();
16268 new_part
= ¤t
.variant_parts
.back ();
16271 /* When we recurse, we want callees to add to this new variant
16273 scoped_restore save_current_variant_part
16274 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
16276 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16279 /* It's a univariant form, an extension we support. */
16281 else if (discr
->form_is_ref ())
16283 struct dwarf2_cu
*target_cu
= cu
;
16284 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16286 new_part
->discriminant_offset
= target_die
->sect_off
;
16290 complaint (_("DW_AT_discr does not have DIE reference form"
16291 " - DIE at %s [in module %s]"),
16292 sect_offset_str (die
->sect_off
),
16293 objfile_name (cu
->per_objfile
->objfile
));
16296 for (die_info
*child_die
= die
->child
;
16298 child_die
= child_die
->sibling
)
16299 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
16302 /* A helper for handle_struct_member_die that handles
16306 handle_variant (struct die_info
*die
, struct type
*type
,
16307 struct field_info
*fi
,
16308 std::vector
<struct symbol
*> *template_args
,
16309 struct dwarf2_cu
*cu
)
16311 if (fi
->current_variant_part
== nullptr)
16313 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
16314 "- DIE at %s [in module %s]"),
16315 sect_offset_str (die
->sect_off
),
16316 objfile_name (cu
->per_objfile
->objfile
));
16319 if (fi
->current_variant_part
->processing_variant
)
16321 complaint (_("nested DW_TAG_variant seen "
16322 "- DIE at %s [in module %s]"),
16323 sect_offset_str (die
->sect_off
),
16324 objfile_name (cu
->per_objfile
->objfile
));
16328 scoped_restore save_processing_variant
16329 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
16332 fi
->current_variant_part
->variants
.emplace_back ();
16333 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
16334 variant
.first_field
= fi
->fields
.size ();
16336 /* In a variant we want to get the discriminant and also add a
16337 field for our sole member child. */
16338 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
16339 if (discr
== nullptr || !discr
->form_is_constant ())
16341 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
16342 if (discr
== nullptr || discr
->as_block ()->size
== 0)
16343 variant
.default_branch
= true;
16345 variant
.discr_list_data
= discr
->as_block ();
16348 variant
.discriminant_value
= discr
->constant_value (0);
16350 for (die_info
*variant_child
= die
->child
;
16351 variant_child
!= NULL
;
16352 variant_child
= variant_child
->sibling
)
16353 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
16355 variant
.last_field
= fi
->fields
.size ();
16358 /* A helper for process_structure_scope that handles a single member
16362 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
16363 struct field_info
*fi
,
16364 std::vector
<struct symbol
*> *template_args
,
16365 struct dwarf2_cu
*cu
)
16367 if (child_die
->tag
== DW_TAG_member
16368 || child_die
->tag
== DW_TAG_variable
)
16370 /* NOTE: carlton/2002-11-05: A C++ static data member
16371 should be a DW_TAG_member that is a declaration, but
16372 all versions of G++ as of this writing (so through at
16373 least 3.2.1) incorrectly generate DW_TAG_variable
16374 tags for them instead. */
16375 dwarf2_add_field (fi
, child_die
, cu
);
16377 else if (child_die
->tag
== DW_TAG_subprogram
)
16379 /* Rust doesn't have member functions in the C++ sense.
16380 However, it does emit ordinary functions as children
16381 of a struct DIE. */
16382 if (cu
->language
== language_rust
)
16383 read_func_scope (child_die
, cu
);
16386 /* C++ member function. */
16387 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
16390 else if (child_die
->tag
== DW_TAG_inheritance
)
16392 /* C++ base class field. */
16393 dwarf2_add_field (fi
, child_die
, cu
);
16395 else if (type_can_define_types (child_die
))
16396 dwarf2_add_type_defn (fi
, child_die
, cu
);
16397 else if (child_die
->tag
== DW_TAG_template_type_param
16398 || child_die
->tag
== DW_TAG_template_value_param
)
16400 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
16403 template_args
->push_back (arg
);
16405 else if (child_die
->tag
== DW_TAG_variant_part
)
16406 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
16407 else if (child_die
->tag
== DW_TAG_variant
)
16408 handle_variant (child_die
, type
, fi
, template_args
, cu
);
16411 /* Finish creating a structure or union type, including filling in
16412 its members and creating a symbol for it. */
16415 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16417 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16418 struct die_info
*child_die
;
16421 type
= get_die_type (die
, cu
);
16423 type
= read_structure_type (die
, cu
);
16425 bool has_template_parameters
= false;
16426 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16428 struct field_info fi
;
16429 std::vector
<struct symbol
*> template_args
;
16431 child_die
= die
->child
;
16433 while (child_die
&& child_die
->tag
)
16435 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16436 child_die
= child_die
->sibling
;
16439 /* Attach template arguments to type. */
16440 if (!template_args
.empty ())
16442 has_template_parameters
= true;
16443 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16444 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16445 TYPE_TEMPLATE_ARGUMENTS (type
)
16446 = XOBNEWVEC (&objfile
->objfile_obstack
,
16448 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16449 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16450 template_args
.data (),
16451 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16452 * sizeof (struct symbol
*)));
16455 /* Attach fields and member functions to the type. */
16456 if (fi
.nfields () > 0)
16457 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16458 if (!fi
.fnfieldlists
.empty ())
16460 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16462 /* Get the type which refers to the base class (possibly this
16463 class itself) which contains the vtable pointer for the current
16464 class from the DW_AT_containing_type attribute. This use of
16465 DW_AT_containing_type is a GNU extension. */
16467 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16469 struct type
*t
= die_containing_type (die
, cu
);
16471 set_type_vptr_basetype (type
, t
);
16476 /* Our own class provides vtbl ptr. */
16477 for (i
= t
->num_fields () - 1;
16478 i
>= TYPE_N_BASECLASSES (t
);
16481 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16483 if (is_vtable_name (fieldname
, cu
))
16485 set_type_vptr_fieldno (type
, i
);
16490 /* Complain if virtual function table field not found. */
16491 if (i
< TYPE_N_BASECLASSES (t
))
16492 complaint (_("virtual function table pointer "
16493 "not found when defining class '%s'"),
16494 type
->name () ? type
->name () : "");
16498 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16501 else if (cu
->producer
16502 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16504 /* The IBM XLC compiler does not provide direct indication
16505 of the containing type, but the vtable pointer is
16506 always named __vfp. */
16510 for (i
= type
->num_fields () - 1;
16511 i
>= TYPE_N_BASECLASSES (type
);
16514 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16516 set_type_vptr_fieldno (type
, i
);
16517 set_type_vptr_basetype (type
, type
);
16524 /* Copy fi.typedef_field_list linked list elements content into the
16525 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16526 if (!fi
.typedef_field_list
.empty ())
16528 int count
= fi
.typedef_field_list
.size ();
16530 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16531 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16532 = ((struct decl_field
*)
16534 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16535 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16537 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16538 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16541 /* Copy fi.nested_types_list linked list elements content into the
16542 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16543 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16545 int count
= fi
.nested_types_list
.size ();
16547 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16548 TYPE_NESTED_TYPES_ARRAY (type
)
16549 = ((struct decl_field
*)
16550 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16551 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16553 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16554 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16558 quirk_gcc_member_function_pointer (type
, objfile
);
16559 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16560 cu
->rust_unions
.push_back (type
);
16561 else if (cu
->language
== language_ada
)
16562 quirk_ada_thick_pointer_struct (die
, cu
, type
);
16564 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16565 snapshots) has been known to create a die giving a declaration
16566 for a class that has, as a child, a die giving a definition for a
16567 nested class. So we have to process our children even if the
16568 current die is a declaration. Normally, of course, a declaration
16569 won't have any children at all. */
16571 child_die
= die
->child
;
16573 while (child_die
!= NULL
&& child_die
->tag
)
16575 if (child_die
->tag
== DW_TAG_member
16576 || child_die
->tag
== DW_TAG_variable
16577 || child_die
->tag
== DW_TAG_inheritance
16578 || child_die
->tag
== DW_TAG_template_value_param
16579 || child_die
->tag
== DW_TAG_template_type_param
)
16584 process_die (child_die
, cu
);
16586 child_die
= child_die
->sibling
;
16589 /* Do not consider external references. According to the DWARF standard,
16590 these DIEs are identified by the fact that they have no byte_size
16591 attribute, and a declaration attribute. */
16592 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16593 || !die_is_declaration (die
, cu
)
16594 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
16596 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16598 if (has_template_parameters
)
16600 struct symtab
*symtab
;
16601 if (sym
!= nullptr)
16602 symtab
= symbol_symtab (sym
);
16603 else if (cu
->line_header
!= nullptr)
16605 /* Any related symtab will do. */
16607 = cu
->line_header
->file_names ()[0].symtab
;
16612 complaint (_("could not find suitable "
16613 "symtab for template parameter"
16614 " - DIE at %s [in module %s]"),
16615 sect_offset_str (die
->sect_off
),
16616 objfile_name (objfile
));
16619 if (symtab
!= nullptr)
16621 /* Make sure that the symtab is set on the new symbols.
16622 Even though they don't appear in this symtab directly,
16623 other parts of gdb assume that symbols do, and this is
16624 reasonably true. */
16625 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16626 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16632 /* Assuming DIE is an enumeration type, and TYPE is its associated
16633 type, update TYPE using some information only available in DIE's
16634 children. In particular, the fields are computed. */
16637 update_enumeration_type_from_children (struct die_info
*die
,
16639 struct dwarf2_cu
*cu
)
16641 struct die_info
*child_die
;
16642 int unsigned_enum
= 1;
16645 auto_obstack obstack
;
16646 std::vector
<struct field
> fields
;
16648 for (child_die
= die
->child
;
16649 child_die
!= NULL
&& child_die
->tag
;
16650 child_die
= child_die
->sibling
)
16652 struct attribute
*attr
;
16654 const gdb_byte
*bytes
;
16655 struct dwarf2_locexpr_baton
*baton
;
16658 if (child_die
->tag
!= DW_TAG_enumerator
)
16661 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16665 name
= dwarf2_name (child_die
, cu
);
16667 name
= "<anonymous enumerator>";
16669 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16670 &value
, &bytes
, &baton
);
16678 if (count_one_bits_ll (value
) >= 2)
16682 fields
.emplace_back ();
16683 struct field
&field
= fields
.back ();
16684 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
16685 SET_FIELD_ENUMVAL (field
, value
);
16688 if (!fields
.empty ())
16690 type
->set_num_fields (fields
.size ());
16693 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
16694 memcpy (type
->fields (), fields
.data (),
16695 sizeof (struct field
) * fields
.size ());
16699 type
->set_is_unsigned (true);
16702 TYPE_FLAG_ENUM (type
) = 1;
16705 /* Given a DW_AT_enumeration_type die, set its type. We do not
16706 complete the type's fields yet, or create any symbols. */
16708 static struct type
*
16709 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16711 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16713 struct attribute
*attr
;
16716 /* If the definition of this type lives in .debug_types, read that type.
16717 Don't follow DW_AT_specification though, that will take us back up
16718 the chain and we want to go down. */
16719 attr
= die
->attr (DW_AT_signature
);
16720 if (attr
!= nullptr)
16722 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16724 /* The type's CU may not be the same as CU.
16725 Ensure TYPE is recorded with CU in die_type_hash. */
16726 return set_die_type (die
, type
, cu
);
16729 type
= alloc_type (objfile
);
16731 type
->set_code (TYPE_CODE_ENUM
);
16732 name
= dwarf2_full_name (NULL
, die
, cu
);
16734 type
->set_name (name
);
16736 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16739 struct type
*underlying_type
= die_type (die
, cu
);
16741 TYPE_TARGET_TYPE (type
) = underlying_type
;
16744 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16745 if (attr
!= nullptr)
16747 TYPE_LENGTH (type
) = attr
->constant_value (0);
16751 TYPE_LENGTH (type
) = 0;
16754 maybe_set_alignment (cu
, die
, type
);
16756 /* The enumeration DIE can be incomplete. In Ada, any type can be
16757 declared as private in the package spec, and then defined only
16758 inside the package body. Such types are known as Taft Amendment
16759 Types. When another package uses such a type, an incomplete DIE
16760 may be generated by the compiler. */
16761 if (die_is_declaration (die
, cu
))
16762 type
->set_is_stub (true);
16764 /* If this type has an underlying type that is not a stub, then we
16765 may use its attributes. We always use the "unsigned" attribute
16766 in this situation, because ordinarily we guess whether the type
16767 is unsigned -- but the guess can be wrong and the underlying type
16768 can tell us the reality. However, we defer to a local size
16769 attribute if one exists, because this lets the compiler override
16770 the underlying type if needed. */
16771 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_TARGET_TYPE (type
)->is_stub ())
16773 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16774 underlying_type
= check_typedef (underlying_type
);
16776 type
->set_is_unsigned (underlying_type
->is_unsigned ());
16778 if (TYPE_LENGTH (type
) == 0)
16779 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16781 if (TYPE_RAW_ALIGN (type
) == 0
16782 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16783 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16786 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16788 set_die_type (die
, type
, cu
);
16790 /* Finish the creation of this type by using the enum's children.
16791 Note that, as usual, this must come after set_die_type to avoid
16792 infinite recursion when trying to compute the names of the
16794 update_enumeration_type_from_children (die
, type
, cu
);
16799 /* Given a pointer to a die which begins an enumeration, process all
16800 the dies that define the members of the enumeration, and create the
16801 symbol for the enumeration type.
16803 NOTE: We reverse the order of the element list. */
16806 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16808 struct type
*this_type
;
16810 this_type
= get_die_type (die
, cu
);
16811 if (this_type
== NULL
)
16812 this_type
= read_enumeration_type (die
, cu
);
16814 if (die
->child
!= NULL
)
16816 struct die_info
*child_die
;
16819 child_die
= die
->child
;
16820 while (child_die
&& child_die
->tag
)
16822 if (child_die
->tag
!= DW_TAG_enumerator
)
16824 process_die (child_die
, cu
);
16828 name
= dwarf2_name (child_die
, cu
);
16830 new_symbol (child_die
, this_type
, cu
);
16833 child_die
= child_die
->sibling
;
16837 /* If we are reading an enum from a .debug_types unit, and the enum
16838 is a declaration, and the enum is not the signatured type in the
16839 unit, then we do not want to add a symbol for it. Adding a
16840 symbol would in some cases obscure the true definition of the
16841 enum, giving users an incomplete type when the definition is
16842 actually available. Note that we do not want to do this for all
16843 enums which are just declarations, because C++0x allows forward
16844 enum declarations. */
16845 if (cu
->per_cu
->is_debug_types
16846 && die_is_declaration (die
, cu
))
16848 struct signatured_type
*sig_type
;
16850 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16851 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16852 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16856 new_symbol (die
, this_type
, cu
);
16859 /* Helper function for quirk_ada_thick_pointer that examines a bounds
16860 expression for an index type and finds the corresponding field
16861 offset in the hidden "P_BOUNDS" structure. Returns true on success
16862 and updates *FIELD, false if it fails to recognize an
16866 recognize_bound_expression (struct die_info
*die
, enum dwarf_attribute name
,
16867 int *bounds_offset
, struct field
*field
,
16868 struct dwarf2_cu
*cu
)
16870 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
16871 if (attr
== nullptr || !attr
->form_is_block ())
16874 const struct dwarf_block
*block
= attr
->as_block ();
16875 const gdb_byte
*start
= block
->data
;
16876 const gdb_byte
*end
= block
->data
+ block
->size
;
16878 /* The expression to recognize generally looks like:
16880 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16881 DW_OP_plus_uconst: 4; DW_OP_deref_size: 4)
16883 However, the second "plus_uconst" may be missing:
16885 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16886 DW_OP_deref_size: 4)
16888 This happens when the field is at the start of the structure.
16890 Also, the final deref may not be sized:
16892 (DW_OP_push_object_address; DW_OP_plus_uconst: 4; DW_OP_deref;
16895 This happens when the size of the index type happens to be the
16896 same as the architecture's word size. This can occur with or
16897 without the second plus_uconst. */
16899 if (end
- start
< 2)
16901 if (*start
++ != DW_OP_push_object_address
)
16903 if (*start
++ != DW_OP_plus_uconst
)
16906 uint64_t this_bound_off
;
16907 start
= gdb_read_uleb128 (start
, end
, &this_bound_off
);
16908 if (start
== nullptr || (int) this_bound_off
!= this_bound_off
)
16910 /* Update *BOUNDS_OFFSET if needed, or alternatively verify that it
16911 is consistent among all bounds. */
16912 if (*bounds_offset
== -1)
16913 *bounds_offset
= this_bound_off
;
16914 else if (*bounds_offset
!= this_bound_off
)
16917 if (start
== end
|| *start
++ != DW_OP_deref
)
16923 else if (*start
== DW_OP_deref_size
|| *start
== DW_OP_deref
)
16925 /* This means an offset of 0. */
16927 else if (*start
++ != DW_OP_plus_uconst
)
16931 /* The size is the parameter to DW_OP_plus_uconst. */
16933 start
= gdb_read_uleb128 (start
, end
, &val
);
16934 if (start
== nullptr)
16936 if ((int) val
!= val
)
16945 if (*start
== DW_OP_deref_size
)
16947 start
= gdb_read_uleb128 (start
+ 1, end
, &size
);
16948 if (start
== nullptr)
16951 else if (*start
== DW_OP_deref
)
16953 size
= cu
->header
.addr_size
;
16959 SET_FIELD_BITPOS (*field
, 8 * offset
);
16960 if (size
!= TYPE_LENGTH (field
->type ()))
16961 FIELD_BITSIZE (*field
) = 8 * size
;
16966 /* With -fgnat-encodings=minimal, gcc will emit some unusual DWARF for
16967 some kinds of Ada arrays:
16969 <1><11db>: Abbrev Number: 7 (DW_TAG_array_type)
16970 <11dc> DW_AT_name : (indirect string, offset: 0x1bb8): string
16971 <11e0> DW_AT_data_location: 2 byte block: 97 6
16972 (DW_OP_push_object_address; DW_OP_deref)
16973 <11e3> DW_AT_type : <0x1173>
16974 <11e7> DW_AT_sibling : <0x1201>
16975 <2><11eb>: Abbrev Number: 8 (DW_TAG_subrange_type)
16976 <11ec> DW_AT_type : <0x1206>
16977 <11f0> DW_AT_lower_bound : 6 byte block: 97 23 8 6 94 4
16978 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16979 DW_OP_deref_size: 4)
16980 <11f7> DW_AT_upper_bound : 8 byte block: 97 23 8 6 23 4 94 4
16981 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16982 DW_OP_plus_uconst: 4; DW_OP_deref_size: 4)
16984 This actually represents a "thick pointer", which is a structure
16985 with two elements: one that is a pointer to the array data, and one
16986 that is a pointer to another structure; this second structure holds
16989 This returns a new type on success, or nullptr if this didn't
16990 recognize the type. */
16992 static struct type
*
16993 quirk_ada_thick_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
,
16996 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
16997 /* So far we've only seen this with block form. */
16998 if (attr
== nullptr || !attr
->form_is_block ())
17001 /* Note that this will fail if the structure layout is changed by
17002 the compiler. However, we have no good way to recognize some
17003 other layout, because we don't know what expression the compiler
17004 might choose to emit should this happen. */
17005 struct dwarf_block
*blk
= attr
->as_block ();
17007 || blk
->data
[0] != DW_OP_push_object_address
17008 || blk
->data
[1] != DW_OP_deref
)
17011 int bounds_offset
= -1;
17012 int max_align
= -1;
17013 std::vector
<struct field
> range_fields
;
17014 for (struct die_info
*child_die
= die
->child
;
17016 child_die
= child_die
->sibling
)
17018 if (child_die
->tag
== DW_TAG_subrange_type
)
17020 struct type
*underlying
= read_subrange_index_type (child_die
, cu
);
17022 int this_align
= type_align (underlying
);
17023 if (this_align
> max_align
)
17024 max_align
= this_align
;
17026 range_fields
.emplace_back ();
17027 range_fields
.emplace_back ();
17029 struct field
&lower
= range_fields
[range_fields
.size () - 2];
17030 struct field
&upper
= range_fields
[range_fields
.size () - 1];
17032 lower
.set_type (underlying
);
17033 FIELD_ARTIFICIAL (lower
) = 1;
17035 upper
.set_type (underlying
);
17036 FIELD_ARTIFICIAL (upper
) = 1;
17038 if (!recognize_bound_expression (child_die
, DW_AT_lower_bound
,
17039 &bounds_offset
, &lower
, cu
)
17040 || !recognize_bound_expression (child_die
, DW_AT_upper_bound
,
17041 &bounds_offset
, &upper
, cu
))
17046 /* This shouldn't really happen, but double-check that we found
17047 where the bounds are stored. */
17048 if (bounds_offset
== -1)
17051 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17052 for (int i
= 0; i
< range_fields
.size (); i
+= 2)
17056 /* Set the name of each field in the bounds. */
17057 xsnprintf (name
, sizeof (name
), "LB%d", i
/ 2);
17058 FIELD_NAME (range_fields
[i
]) = objfile
->intern (name
);
17059 xsnprintf (name
, sizeof (name
), "UB%d", i
/ 2);
17060 FIELD_NAME (range_fields
[i
+ 1]) = objfile
->intern (name
);
17063 struct type
*bounds
= alloc_type (objfile
);
17064 bounds
->set_code (TYPE_CODE_STRUCT
);
17066 bounds
->set_num_fields (range_fields
.size ());
17068 ((struct field
*) TYPE_ALLOC (bounds
, (bounds
->num_fields ()
17069 * sizeof (struct field
))));
17070 memcpy (bounds
->fields (), range_fields
.data (),
17071 bounds
->num_fields () * sizeof (struct field
));
17073 int last_fieldno
= range_fields
.size () - 1;
17074 int bounds_size
= (TYPE_FIELD_BITPOS (bounds
, last_fieldno
) / 8
17075 + TYPE_LENGTH (bounds
->field (last_fieldno
).type ()));
17076 TYPE_LENGTH (bounds
) = align_up (bounds_size
, max_align
);
17078 /* Rewrite the existing array type in place. Specifically, we
17079 remove any dynamic properties we might have read, and we replace
17080 the index types. */
17081 struct type
*iter
= type
;
17082 for (int i
= 0; i
< range_fields
.size (); i
+= 2)
17084 gdb_assert (iter
->code () == TYPE_CODE_ARRAY
);
17085 iter
->main_type
->dyn_prop_list
= nullptr;
17086 iter
->set_index_type
17087 (create_static_range_type (NULL
, bounds
->field (i
).type (), 1, 0));
17088 iter
= TYPE_TARGET_TYPE (iter
);
17091 struct type
*result
= alloc_type (objfile
);
17092 result
->set_code (TYPE_CODE_STRUCT
);
17094 result
->set_num_fields (2);
17096 ((struct field
*) TYPE_ZALLOC (result
, (result
->num_fields ()
17097 * sizeof (struct field
))));
17099 /* The names are chosen to coincide with what the compiler does with
17100 -fgnat-encodings=all, which the Ada code in gdb already
17102 TYPE_FIELD_NAME (result
, 0) = "P_ARRAY";
17103 result
->field (0).set_type (lookup_pointer_type (type
));
17105 TYPE_FIELD_NAME (result
, 1) = "P_BOUNDS";
17106 result
->field (1).set_type (lookup_pointer_type (bounds
));
17107 SET_FIELD_BITPOS (result
->field (1), 8 * bounds_offset
);
17109 result
->set_name (type
->name ());
17110 TYPE_LENGTH (result
) = (TYPE_LENGTH (result
->field (0).type ())
17111 + TYPE_LENGTH (result
->field (1).type ()));
17116 /* Extract all information from a DW_TAG_array_type DIE and put it in
17117 the DIE's type field. For now, this only handles one dimensional
17120 static struct type
*
17121 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17123 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17124 struct die_info
*child_die
;
17126 struct type
*element_type
, *range_type
, *index_type
;
17127 struct attribute
*attr
;
17129 struct dynamic_prop
*byte_stride_prop
= NULL
;
17130 unsigned int bit_stride
= 0;
17132 element_type
= die_type (die
, cu
);
17134 /* The die_type call above may have already set the type for this DIE. */
17135 type
= get_die_type (die
, cu
);
17139 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17143 struct type
*prop_type
= cu
->addr_sized_int_type (false);
17146 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
17147 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
17151 complaint (_("unable to read array DW_AT_byte_stride "
17152 " - DIE at %s [in module %s]"),
17153 sect_offset_str (die
->sect_off
),
17154 objfile_name (cu
->per_objfile
->objfile
));
17155 /* Ignore this attribute. We will likely not be able to print
17156 arrays of this type correctly, but there is little we can do
17157 to help if we cannot read the attribute's value. */
17158 byte_stride_prop
= NULL
;
17162 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17164 bit_stride
= attr
->constant_value (0);
17166 /* Irix 6.2 native cc creates array types without children for
17167 arrays with unspecified length. */
17168 if (die
->child
== NULL
)
17170 index_type
= objfile_type (objfile
)->builtin_int
;
17171 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
17172 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
17173 byte_stride_prop
, bit_stride
);
17174 return set_die_type (die
, type
, cu
);
17177 std::vector
<struct type
*> range_types
;
17178 child_die
= die
->child
;
17179 while (child_die
&& child_die
->tag
)
17181 if (child_die
->tag
== DW_TAG_subrange_type
)
17183 struct type
*child_type
= read_type_die (child_die
, cu
);
17185 if (child_type
!= NULL
)
17187 /* The range type was succesfully read. Save it for the
17188 array type creation. */
17189 range_types
.push_back (child_type
);
17192 child_die
= child_die
->sibling
;
17195 /* Dwarf2 dimensions are output from left to right, create the
17196 necessary array types in backwards order. */
17198 type
= element_type
;
17200 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
17204 while (i
< range_types
.size ())
17206 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
17207 byte_stride_prop
, bit_stride
);
17209 byte_stride_prop
= nullptr;
17214 size_t ndim
= range_types
.size ();
17217 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
17218 byte_stride_prop
, bit_stride
);
17220 byte_stride_prop
= nullptr;
17224 /* Understand Dwarf2 support for vector types (like they occur on
17225 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
17226 array type. This is not part of the Dwarf2/3 standard yet, but a
17227 custom vendor extension. The main difference between a regular
17228 array and the vector variant is that vectors are passed by value
17230 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
17231 if (attr
!= nullptr)
17232 make_vector_type (type
);
17234 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
17235 implementation may choose to implement triple vectors using this
17237 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17238 if (attr
!= nullptr && attr
->form_is_unsigned ())
17240 if (attr
->as_unsigned () >= TYPE_LENGTH (type
))
17241 TYPE_LENGTH (type
) = attr
->as_unsigned ();
17243 complaint (_("DW_AT_byte_size for array type smaller "
17244 "than the total size of elements"));
17247 name
= dwarf2_name (die
, cu
);
17249 type
->set_name (name
);
17251 maybe_set_alignment (cu
, die
, type
);
17253 struct type
*replacement_type
= nullptr;
17254 if (cu
->language
== language_ada
)
17256 replacement_type
= quirk_ada_thick_pointer (die
, cu
, type
);
17257 if (replacement_type
!= nullptr)
17258 type
= replacement_type
;
17261 /* Install the type in the die. */
17262 set_die_type (die
, type
, cu
, replacement_type
!= nullptr);
17264 /* set_die_type should be already done. */
17265 set_descriptive_type (type
, die
, cu
);
17270 static enum dwarf_array_dim_ordering
17271 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
17273 struct attribute
*attr
;
17275 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
17277 if (attr
!= nullptr)
17279 LONGEST val
= attr
->constant_value (-1);
17280 if (val
== DW_ORD_row_major
|| val
== DW_ORD_col_major
)
17281 return (enum dwarf_array_dim_ordering
) val
;
17284 /* GNU F77 is a special case, as at 08/2004 array type info is the
17285 opposite order to the dwarf2 specification, but data is still
17286 laid out as per normal fortran.
17288 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
17289 version checking. */
17291 if (cu
->language
== language_fortran
17292 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
17294 return DW_ORD_row_major
;
17297 switch (cu
->language_defn
->array_ordering ())
17299 case array_column_major
:
17300 return DW_ORD_col_major
;
17301 case array_row_major
:
17303 return DW_ORD_row_major
;
17307 /* Extract all information from a DW_TAG_set_type DIE and put it in
17308 the DIE's type field. */
17310 static struct type
*
17311 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17313 struct type
*domain_type
, *set_type
;
17314 struct attribute
*attr
;
17316 domain_type
= die_type (die
, cu
);
17318 /* The die_type call above may have already set the type for this DIE. */
17319 set_type
= get_die_type (die
, cu
);
17323 set_type
= create_set_type (NULL
, domain_type
);
17325 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17326 if (attr
!= nullptr && attr
->form_is_unsigned ())
17327 TYPE_LENGTH (set_type
) = attr
->as_unsigned ();
17329 maybe_set_alignment (cu
, die
, set_type
);
17331 return set_die_type (die
, set_type
, cu
);
17334 /* A helper for read_common_block that creates a locexpr baton.
17335 SYM is the symbol which we are marking as computed.
17336 COMMON_DIE is the DIE for the common block.
17337 COMMON_LOC is the location expression attribute for the common
17339 MEMBER_LOC is the location expression attribute for the particular
17340 member of the common block that we are processing.
17341 CU is the CU from which the above come. */
17344 mark_common_block_symbol_computed (struct symbol
*sym
,
17345 struct die_info
*common_die
,
17346 struct attribute
*common_loc
,
17347 struct attribute
*member_loc
,
17348 struct dwarf2_cu
*cu
)
17350 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
17351 struct objfile
*objfile
= per_objfile
->objfile
;
17352 struct dwarf2_locexpr_baton
*baton
;
17354 unsigned int cu_off
;
17355 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
17356 LONGEST offset
= 0;
17358 gdb_assert (common_loc
&& member_loc
);
17359 gdb_assert (common_loc
->form_is_block ());
17360 gdb_assert (member_loc
->form_is_block ()
17361 || member_loc
->form_is_constant ());
17363 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
17364 baton
->per_objfile
= per_objfile
;
17365 baton
->per_cu
= cu
->per_cu
;
17366 gdb_assert (baton
->per_cu
);
17368 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
17370 if (member_loc
->form_is_constant ())
17372 offset
= member_loc
->constant_value (0);
17373 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
17376 baton
->size
+= member_loc
->as_block ()->size
;
17378 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
17381 *ptr
++ = DW_OP_call4
;
17382 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
17383 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
17386 if (member_loc
->form_is_constant ())
17388 *ptr
++ = DW_OP_addr
;
17389 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
17390 ptr
+= cu
->header
.addr_size
;
17394 /* We have to copy the data here, because DW_OP_call4 will only
17395 use a DW_AT_location attribute. */
17396 struct dwarf_block
*block
= member_loc
->as_block ();
17397 memcpy (ptr
, block
->data
, block
->size
);
17398 ptr
+= block
->size
;
17401 *ptr
++ = DW_OP_plus
;
17402 gdb_assert (ptr
- baton
->data
== baton
->size
);
17404 SYMBOL_LOCATION_BATON (sym
) = baton
;
17405 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
17408 /* Create appropriate locally-scoped variables for all the
17409 DW_TAG_common_block entries. Also create a struct common_block
17410 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
17411 is used to separate the common blocks name namespace from regular
17415 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
17417 struct attribute
*attr
;
17419 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17420 if (attr
!= nullptr)
17422 /* Support the .debug_loc offsets. */
17423 if (attr
->form_is_block ())
17427 else if (attr
->form_is_section_offset ())
17429 dwarf2_complex_location_expr_complaint ();
17434 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17435 "common block member");
17440 if (die
->child
!= NULL
)
17442 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17443 struct die_info
*child_die
;
17444 size_t n_entries
= 0, size
;
17445 struct common_block
*common_block
;
17446 struct symbol
*sym
;
17448 for (child_die
= die
->child
;
17449 child_die
&& child_die
->tag
;
17450 child_die
= child_die
->sibling
)
17453 size
= (sizeof (struct common_block
)
17454 + (n_entries
- 1) * sizeof (struct symbol
*));
17456 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
17458 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
17459 common_block
->n_entries
= 0;
17461 for (child_die
= die
->child
;
17462 child_die
&& child_die
->tag
;
17463 child_die
= child_die
->sibling
)
17465 /* Create the symbol in the DW_TAG_common_block block in the current
17467 sym
= new_symbol (child_die
, NULL
, cu
);
17470 struct attribute
*member_loc
;
17472 common_block
->contents
[common_block
->n_entries
++] = sym
;
17474 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
17478 /* GDB has handled this for a long time, but it is
17479 not specified by DWARF. It seems to have been
17480 emitted by gfortran at least as recently as:
17481 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
17482 complaint (_("Variable in common block has "
17483 "DW_AT_data_member_location "
17484 "- DIE at %s [in module %s]"),
17485 sect_offset_str (child_die
->sect_off
),
17486 objfile_name (objfile
));
17488 if (member_loc
->form_is_section_offset ())
17489 dwarf2_complex_location_expr_complaint ();
17490 else if (member_loc
->form_is_constant ()
17491 || member_loc
->form_is_block ())
17493 if (attr
!= nullptr)
17494 mark_common_block_symbol_computed (sym
, die
, attr
,
17498 dwarf2_complex_location_expr_complaint ();
17503 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
17504 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
17508 /* Create a type for a C++ namespace. */
17510 static struct type
*
17511 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17513 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17514 const char *previous_prefix
, *name
;
17518 /* For extensions, reuse the type of the original namespace. */
17519 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
17521 struct die_info
*ext_die
;
17522 struct dwarf2_cu
*ext_cu
= cu
;
17524 ext_die
= dwarf2_extension (die
, &ext_cu
);
17525 type
= read_type_die (ext_die
, ext_cu
);
17527 /* EXT_CU may not be the same as CU.
17528 Ensure TYPE is recorded with CU in die_type_hash. */
17529 return set_die_type (die
, type
, cu
);
17532 name
= namespace_name (die
, &is_anonymous
, cu
);
17534 /* Now build the name of the current namespace. */
17536 previous_prefix
= determine_prefix (die
, cu
);
17537 if (previous_prefix
[0] != '\0')
17538 name
= typename_concat (&objfile
->objfile_obstack
,
17539 previous_prefix
, name
, 0, cu
);
17541 /* Create the type. */
17542 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
17544 return set_die_type (die
, type
, cu
);
17547 /* Read a namespace scope. */
17550 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
17552 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17555 /* Add a symbol associated to this if we haven't seen the namespace
17556 before. Also, add a using directive if it's an anonymous
17559 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
17563 type
= read_type_die (die
, cu
);
17564 new_symbol (die
, type
, cu
);
17566 namespace_name (die
, &is_anonymous
, cu
);
17569 const char *previous_prefix
= determine_prefix (die
, cu
);
17571 std::vector
<const char *> excludes
;
17572 add_using_directive (using_directives (cu
),
17573 previous_prefix
, type
->name (), NULL
,
17574 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
17578 if (die
->child
!= NULL
)
17580 struct die_info
*child_die
= die
->child
;
17582 while (child_die
&& child_die
->tag
)
17584 process_die (child_die
, cu
);
17585 child_die
= child_die
->sibling
;
17590 /* Read a Fortran module as type. This DIE can be only a declaration used for
17591 imported module. Still we need that type as local Fortran "use ... only"
17592 declaration imports depend on the created type in determine_prefix. */
17594 static struct type
*
17595 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17597 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17598 const char *module_name
;
17601 module_name
= dwarf2_name (die
, cu
);
17602 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
17604 return set_die_type (die
, type
, cu
);
17607 /* Read a Fortran module. */
17610 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
17612 struct die_info
*child_die
= die
->child
;
17615 type
= read_type_die (die
, cu
);
17616 new_symbol (die
, type
, cu
);
17618 while (child_die
&& child_die
->tag
)
17620 process_die (child_die
, cu
);
17621 child_die
= child_die
->sibling
;
17625 /* Return the name of the namespace represented by DIE. Set
17626 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
17629 static const char *
17630 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
17632 struct die_info
*current_die
;
17633 const char *name
= NULL
;
17635 /* Loop through the extensions until we find a name. */
17637 for (current_die
= die
;
17638 current_die
!= NULL
;
17639 current_die
= dwarf2_extension (die
, &cu
))
17641 /* We don't use dwarf2_name here so that we can detect the absence
17642 of a name -> anonymous namespace. */
17643 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
17649 /* Is it an anonymous namespace? */
17651 *is_anonymous
= (name
== NULL
);
17653 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17658 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17659 the user defined type vector. */
17661 static struct type
*
17662 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17664 struct gdbarch
*gdbarch
= cu
->per_objfile
->objfile
->arch ();
17665 struct comp_unit_head
*cu_header
= &cu
->header
;
17667 struct attribute
*attr_byte_size
;
17668 struct attribute
*attr_address_class
;
17669 int byte_size
, addr_class
;
17670 struct type
*target_type
;
17672 target_type
= die_type (die
, cu
);
17674 /* The die_type call above may have already set the type for this DIE. */
17675 type
= get_die_type (die
, cu
);
17679 type
= lookup_pointer_type (target_type
);
17681 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17682 if (attr_byte_size
)
17683 byte_size
= attr_byte_size
->constant_value (cu_header
->addr_size
);
17685 byte_size
= cu_header
->addr_size
;
17687 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17688 if (attr_address_class
)
17689 addr_class
= attr_address_class
->constant_value (DW_ADDR_none
);
17691 addr_class
= DW_ADDR_none
;
17693 ULONGEST alignment
= get_alignment (cu
, die
);
17695 /* If the pointer size, alignment, or address class is different
17696 than the default, create a type variant marked as such and set
17697 the length accordingly. */
17698 if (TYPE_LENGTH (type
) != byte_size
17699 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17700 && alignment
!= TYPE_RAW_ALIGN (type
))
17701 || addr_class
!= DW_ADDR_none
)
17703 if (gdbarch_address_class_type_flags_p (gdbarch
))
17705 type_instance_flags type_flags
17706 = gdbarch_address_class_type_flags (gdbarch
, byte_size
,
17708 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17710 type
= make_type_with_address_space (type
, type_flags
);
17712 else if (TYPE_LENGTH (type
) != byte_size
)
17714 complaint (_("invalid pointer size %d"), byte_size
);
17716 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17718 complaint (_("Invalid DW_AT_alignment"
17719 " - DIE at %s [in module %s]"),
17720 sect_offset_str (die
->sect_off
),
17721 objfile_name (cu
->per_objfile
->objfile
));
17725 /* Should we also complain about unhandled address classes? */
17729 TYPE_LENGTH (type
) = byte_size
;
17730 set_type_align (type
, alignment
);
17731 return set_die_type (die
, type
, cu
);
17734 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17735 the user defined type vector. */
17737 static struct type
*
17738 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17741 struct type
*to_type
;
17742 struct type
*domain
;
17744 to_type
= die_type (die
, cu
);
17745 domain
= die_containing_type (die
, cu
);
17747 /* The calls above may have already set the type for this DIE. */
17748 type
= get_die_type (die
, cu
);
17752 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
17753 type
= lookup_methodptr_type (to_type
);
17754 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
17756 struct type
*new_type
= alloc_type (cu
->per_objfile
->objfile
);
17758 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17759 to_type
->fields (), to_type
->num_fields (),
17760 to_type
->has_varargs ());
17761 type
= lookup_methodptr_type (new_type
);
17764 type
= lookup_memberptr_type (to_type
, domain
);
17766 return set_die_type (die
, type
, cu
);
17769 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17770 the user defined type vector. */
17772 static struct type
*
17773 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17774 enum type_code refcode
)
17776 struct comp_unit_head
*cu_header
= &cu
->header
;
17777 struct type
*type
, *target_type
;
17778 struct attribute
*attr
;
17780 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17782 target_type
= die_type (die
, cu
);
17784 /* The die_type call above may have already set the type for this DIE. */
17785 type
= get_die_type (die
, cu
);
17789 type
= lookup_reference_type (target_type
, refcode
);
17790 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17791 if (attr
!= nullptr)
17793 TYPE_LENGTH (type
) = attr
->constant_value (cu_header
->addr_size
);
17797 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17799 maybe_set_alignment (cu
, die
, type
);
17800 return set_die_type (die
, type
, cu
);
17803 /* Add the given cv-qualifiers to the element type of the array. GCC
17804 outputs DWARF type qualifiers that apply to an array, not the
17805 element type. But GDB relies on the array element type to carry
17806 the cv-qualifiers. This mimics section 6.7.3 of the C99
17809 static struct type
*
17810 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17811 struct type
*base_type
, int cnst
, int voltl
)
17813 struct type
*el_type
, *inner_array
;
17815 base_type
= copy_type (base_type
);
17816 inner_array
= base_type
;
17818 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
17820 TYPE_TARGET_TYPE (inner_array
) =
17821 copy_type (TYPE_TARGET_TYPE (inner_array
));
17822 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17825 el_type
= TYPE_TARGET_TYPE (inner_array
);
17826 cnst
|= TYPE_CONST (el_type
);
17827 voltl
|= TYPE_VOLATILE (el_type
);
17828 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17830 return set_die_type (die
, base_type
, cu
);
17833 static struct type
*
17834 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17836 struct type
*base_type
, *cv_type
;
17838 base_type
= die_type (die
, cu
);
17840 /* The die_type call above may have already set the type for this DIE. */
17841 cv_type
= get_die_type (die
, cu
);
17845 /* In case the const qualifier is applied to an array type, the element type
17846 is so qualified, not the array type (section 6.7.3 of C99). */
17847 if (base_type
->code () == TYPE_CODE_ARRAY
)
17848 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17850 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17851 return set_die_type (die
, cv_type
, cu
);
17854 static struct type
*
17855 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17857 struct type
*base_type
, *cv_type
;
17859 base_type
= die_type (die
, cu
);
17861 /* The die_type call above may have already set the type for this DIE. */
17862 cv_type
= get_die_type (die
, cu
);
17866 /* In case the volatile qualifier is applied to an array type, the
17867 element type is so qualified, not the array type (section 6.7.3
17869 if (base_type
->code () == TYPE_CODE_ARRAY
)
17870 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17872 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17873 return set_die_type (die
, cv_type
, cu
);
17876 /* Handle DW_TAG_restrict_type. */
17878 static struct type
*
17879 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17881 struct type
*base_type
, *cv_type
;
17883 base_type
= die_type (die
, cu
);
17885 /* The die_type call above may have already set the type for this DIE. */
17886 cv_type
= get_die_type (die
, cu
);
17890 cv_type
= make_restrict_type (base_type
);
17891 return set_die_type (die
, cv_type
, cu
);
17894 /* Handle DW_TAG_atomic_type. */
17896 static struct type
*
17897 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17899 struct type
*base_type
, *cv_type
;
17901 base_type
= die_type (die
, cu
);
17903 /* The die_type call above may have already set the type for this DIE. */
17904 cv_type
= get_die_type (die
, cu
);
17908 cv_type
= make_atomic_type (base_type
);
17909 return set_die_type (die
, cv_type
, cu
);
17912 /* Extract all information from a DW_TAG_string_type DIE and add to
17913 the user defined type vector. It isn't really a user defined type,
17914 but it behaves like one, with other DIE's using an AT_user_def_type
17915 attribute to reference it. */
17917 static struct type
*
17918 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17920 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17921 struct gdbarch
*gdbarch
= objfile
->arch ();
17922 struct type
*type
, *range_type
, *index_type
, *char_type
;
17923 struct attribute
*attr
;
17924 struct dynamic_prop prop
;
17925 bool length_is_constant
= true;
17928 /* There are a couple of places where bit sizes might be made use of
17929 when parsing a DW_TAG_string_type, however, no producer that we know
17930 of make use of these. Handling bit sizes that are a multiple of the
17931 byte size is easy enough, but what about other bit sizes? Lets deal
17932 with that problem when we have to. Warn about these attributes being
17933 unsupported, then parse the type and ignore them like we always
17935 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
17936 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
17938 static bool warning_printed
= false;
17939 if (!warning_printed
)
17941 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
17942 "currently supported on DW_TAG_string_type."));
17943 warning_printed
= true;
17947 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17948 if (attr
!= nullptr && !attr
->form_is_constant ())
17950 /* The string length describes the location at which the length of
17951 the string can be found. The size of the length field can be
17952 specified with one of the attributes below. */
17953 struct type
*prop_type
;
17954 struct attribute
*len
17955 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
17956 if (len
== nullptr)
17957 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17958 if (len
!= nullptr && len
->form_is_constant ())
17960 /* Pass 0 as the default as we know this attribute is constant
17961 and the default value will not be returned. */
17962 LONGEST sz
= len
->constant_value (0);
17963 prop_type
= cu
->per_objfile
->int_type (sz
, true);
17967 /* If the size is not specified then we assume it is the size of
17968 an address on this target. */
17969 prop_type
= cu
->addr_sized_int_type (true);
17972 /* Convert the attribute into a dynamic property. */
17973 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
17976 length_is_constant
= false;
17978 else if (attr
!= nullptr)
17980 /* This DW_AT_string_length just contains the length with no
17981 indirection. There's no need to create a dynamic property in this
17982 case. Pass 0 for the default value as we know it will not be
17983 returned in this case. */
17984 length
= attr
->constant_value (0);
17986 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17988 /* We don't currently support non-constant byte sizes for strings. */
17989 length
= attr
->constant_value (1);
17993 /* Use 1 as a fallback length if we have nothing else. */
17997 index_type
= objfile_type (objfile
)->builtin_int
;
17998 if (length_is_constant
)
17999 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
18002 struct dynamic_prop low_bound
;
18004 low_bound
.set_const_val (1);
18005 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
18007 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
18008 type
= create_string_type (NULL
, char_type
, range_type
);
18010 return set_die_type (die
, type
, cu
);
18013 /* Assuming that DIE corresponds to a function, returns nonzero
18014 if the function is prototyped. */
18017 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
18019 struct attribute
*attr
;
18021 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
18022 if (attr
&& attr
->as_boolean ())
18025 /* The DWARF standard implies that the DW_AT_prototyped attribute
18026 is only meaningful for C, but the concept also extends to other
18027 languages that allow unprototyped functions (Eg: Objective C).
18028 For all other languages, assume that functions are always
18030 if (cu
->language
!= language_c
18031 && cu
->language
!= language_objc
18032 && cu
->language
!= language_opencl
)
18035 /* RealView does not emit DW_AT_prototyped. We can not distinguish
18036 prototyped and unprototyped functions; default to prototyped,
18037 since that is more common in modern code (and RealView warns
18038 about unprototyped functions). */
18039 if (producer_is_realview (cu
->producer
))
18045 /* Handle DIES due to C code like:
18049 int (*funcp)(int a, long l);
18053 ('funcp' generates a DW_TAG_subroutine_type DIE). */
18055 static struct type
*
18056 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18058 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18059 struct type
*type
; /* Type that this function returns. */
18060 struct type
*ftype
; /* Function that returns above type. */
18061 struct attribute
*attr
;
18063 type
= die_type (die
, cu
);
18065 /* The die_type call above may have already set the type for this DIE. */
18066 ftype
= get_die_type (die
, cu
);
18070 ftype
= lookup_function_type (type
);
18072 if (prototyped_function_p (die
, cu
))
18073 ftype
->set_is_prototyped (true);
18075 /* Store the calling convention in the type if it's available in
18076 the subroutine die. Otherwise set the calling convention to
18077 the default value DW_CC_normal. */
18078 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
18079 if (attr
!= nullptr
18080 && is_valid_DW_AT_calling_convention_for_subroutine (attr
->constant_value (0)))
18081 TYPE_CALLING_CONVENTION (ftype
)
18082 = (enum dwarf_calling_convention
) attr
->constant_value (0);
18083 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
18084 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
18086 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
18088 /* Record whether the function returns normally to its caller or not
18089 if the DWARF producer set that information. */
18090 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
18091 if (attr
&& attr
->as_boolean ())
18092 TYPE_NO_RETURN (ftype
) = 1;
18094 /* We need to add the subroutine type to the die immediately so
18095 we don't infinitely recurse when dealing with parameters
18096 declared as the same subroutine type. */
18097 set_die_type (die
, ftype
, cu
);
18099 if (die
->child
!= NULL
)
18101 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
18102 struct die_info
*child_die
;
18103 int nparams
, iparams
;
18105 /* Count the number of parameters.
18106 FIXME: GDB currently ignores vararg functions, but knows about
18107 vararg member functions. */
18109 child_die
= die
->child
;
18110 while (child_die
&& child_die
->tag
)
18112 if (child_die
->tag
== DW_TAG_formal_parameter
)
18114 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
18115 ftype
->set_has_varargs (true);
18117 child_die
= child_die
->sibling
;
18120 /* Allocate storage for parameters and fill them in. */
18121 ftype
->set_num_fields (nparams
);
18123 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
18125 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
18126 even if we error out during the parameters reading below. */
18127 for (iparams
= 0; iparams
< nparams
; iparams
++)
18128 ftype
->field (iparams
).set_type (void_type
);
18131 child_die
= die
->child
;
18132 while (child_die
&& child_die
->tag
)
18134 if (child_die
->tag
== DW_TAG_formal_parameter
)
18136 struct type
*arg_type
;
18138 /* DWARF version 2 has no clean way to discern C++
18139 static and non-static member functions. G++ helps
18140 GDB by marking the first parameter for non-static
18141 member functions (which is the this pointer) as
18142 artificial. We pass this information to
18143 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
18145 DWARF version 3 added DW_AT_object_pointer, which GCC
18146 4.5 does not yet generate. */
18147 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
18148 if (attr
!= nullptr)
18149 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = attr
->as_boolean ();
18151 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
18152 arg_type
= die_type (child_die
, cu
);
18154 /* RealView does not mark THIS as const, which the testsuite
18155 expects. GCC marks THIS as const in method definitions,
18156 but not in the class specifications (GCC PR 43053). */
18157 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
18158 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
18161 struct dwarf2_cu
*arg_cu
= cu
;
18162 const char *name
= dwarf2_name (child_die
, cu
);
18164 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
18165 if (attr
!= nullptr)
18167 /* If the compiler emits this, use it. */
18168 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
18171 else if (name
&& strcmp (name
, "this") == 0)
18172 /* Function definitions will have the argument names. */
18174 else if (name
== NULL
&& iparams
== 0)
18175 /* Declarations may not have the names, so like
18176 elsewhere in GDB, assume an artificial first
18177 argument is "this". */
18181 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
18185 ftype
->field (iparams
).set_type (arg_type
);
18188 child_die
= child_die
->sibling
;
18195 static struct type
*
18196 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
18198 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18199 const char *name
= NULL
;
18200 struct type
*this_type
, *target_type
;
18202 name
= dwarf2_full_name (NULL
, die
, cu
);
18203 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
18204 this_type
->set_target_is_stub (true);
18205 set_die_type (die
, this_type
, cu
);
18206 target_type
= die_type (die
, cu
);
18207 if (target_type
!= this_type
)
18208 TYPE_TARGET_TYPE (this_type
) = target_type
;
18211 /* Self-referential typedefs are, it seems, not allowed by the DWARF
18212 spec and cause infinite loops in GDB. */
18213 complaint (_("Self-referential DW_TAG_typedef "
18214 "- DIE at %s [in module %s]"),
18215 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
18216 TYPE_TARGET_TYPE (this_type
) = NULL
;
18220 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
18221 anonymous typedefs, which is, strictly speaking, invalid DWARF.
18222 Handle these by just returning the target type, rather than
18223 constructing an anonymous typedef type and trying to handle this
18225 set_die_type (die
, target_type
, cu
);
18226 return target_type
;
18231 /* Helper for get_dwarf2_rational_constant that computes the value of
18232 a given gmp_mpz given an attribute. */
18235 get_mpz (struct dwarf2_cu
*cu
, gdb_mpz
*value
, struct attribute
*attr
)
18237 /* GCC will sometimes emit a 16-byte constant value as a DWARF
18238 location expression that pushes an implicit value. */
18239 if (attr
->form
== DW_FORM_exprloc
)
18241 dwarf_block
*blk
= attr
->as_block ();
18242 if (blk
->size
> 0 && blk
->data
[0] == DW_OP_implicit_value
)
18245 const gdb_byte
*ptr
= safe_read_uleb128 (blk
->data
+ 1,
18246 blk
->data
+ blk
->size
,
18248 if (ptr
- blk
->data
+ len
<= blk
->size
)
18250 mpz_import (value
->val
, len
,
18251 bfd_big_endian (cu
->per_objfile
->objfile
->obfd
) ? 1 : -1,
18257 /* On failure set it to 1. */
18258 *value
= gdb_mpz (1);
18260 else if (attr
->form_is_block ())
18262 dwarf_block
*blk
= attr
->as_block ();
18263 mpz_import (value
->val
, blk
->size
,
18264 bfd_big_endian (cu
->per_objfile
->objfile
->obfd
) ? 1 : -1,
18265 1, 0, 0, blk
->data
);
18268 *value
= gdb_mpz (attr
->constant_value (1));
18271 /* Assuming DIE is a rational DW_TAG_constant, read the DIE's
18272 numerator and denominator into NUMERATOR and DENOMINATOR (resp).
18274 If the numerator and/or numerator attribute is missing,
18275 a complaint is filed, and NUMERATOR and DENOMINATOR are left
18279 get_dwarf2_rational_constant (struct die_info
*die
, struct dwarf2_cu
*cu
,
18280 gdb_mpz
*numerator
, gdb_mpz
*denominator
)
18282 struct attribute
*num_attr
, *denom_attr
;
18284 num_attr
= dwarf2_attr (die
, DW_AT_GNU_numerator
, cu
);
18285 if (num_attr
== nullptr)
18286 complaint (_("DW_AT_GNU_numerator missing in %s DIE at %s"),
18287 dwarf_tag_name (die
->tag
), sect_offset_str (die
->sect_off
));
18289 denom_attr
= dwarf2_attr (die
, DW_AT_GNU_denominator
, cu
);
18290 if (denom_attr
== nullptr)
18291 complaint (_("DW_AT_GNU_denominator missing in %s DIE at %s"),
18292 dwarf_tag_name (die
->tag
), sect_offset_str (die
->sect_off
));
18294 if (num_attr
== nullptr || denom_attr
== nullptr)
18297 get_mpz (cu
, numerator
, num_attr
);
18298 get_mpz (cu
, denominator
, denom_attr
);
18301 /* Same as get_dwarf2_rational_constant, but extracting an unsigned
18302 rational constant, rather than a signed one.
18304 If the rational constant has a negative value, a complaint
18305 is filed, and NUMERATOR and DENOMINATOR are left untouched. */
18308 get_dwarf2_unsigned_rational_constant (struct die_info
*die
,
18309 struct dwarf2_cu
*cu
,
18310 gdb_mpz
*numerator
,
18311 gdb_mpz
*denominator
)
18316 get_dwarf2_rational_constant (die
, cu
, &num
, &denom
);
18317 if (mpz_sgn (num
.val
) == -1 && mpz_sgn (denom
.val
) == -1)
18319 mpz_neg (num
.val
, num
.val
);
18320 mpz_neg (denom
.val
, denom
.val
);
18322 else if (mpz_sgn (num
.val
) == -1)
18324 complaint (_("unexpected negative value for DW_AT_GNU_numerator"
18326 sect_offset_str (die
->sect_off
));
18329 else if (mpz_sgn (denom
.val
) == -1)
18331 complaint (_("unexpected negative value for DW_AT_GNU_denominator"
18333 sect_offset_str (die
->sect_off
));
18337 *numerator
= std::move (num
);
18338 *denominator
= std::move (denom
);
18341 /* Assuming DIE corresponds to a fixed point type, finish the creation
18342 of the corresponding TYPE by setting its type-specific data.
18343 CU is the DIE's CU. */
18346 finish_fixed_point_type (struct type
*type
, struct die_info
*die
,
18347 struct dwarf2_cu
*cu
)
18349 struct attribute
*attr
;
18351 gdb_assert (type
->code () == TYPE_CODE_FIXED_POINT
18352 && TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FIXED_POINT
);
18354 attr
= dwarf2_attr (die
, DW_AT_binary_scale
, cu
);
18356 attr
= dwarf2_attr (die
, DW_AT_decimal_scale
, cu
);
18358 attr
= dwarf2_attr (die
, DW_AT_small
, cu
);
18360 /* Numerator and denominator of our fixed-point type's scaling factor.
18361 The default is a scaling factor of 1, which we use as a fallback
18362 when we are not able to decode it (problem with the debugging info,
18363 unsupported forms, bug in GDB, etc...). Using that as the default
18364 allows us to at least print the unscaled value, which might still
18365 be useful to a user. */
18366 gdb_mpz
scale_num (1);
18367 gdb_mpz
scale_denom (1);
18369 if (attr
== nullptr)
18371 /* Scaling factor not found. Assume a scaling factor of 1,
18372 and hope for the best. At least the user will be able to see
18373 the encoded value. */
18374 complaint (_("no scale found for fixed-point type (DIE at %s)"),
18375 sect_offset_str (die
->sect_off
));
18377 else if (attr
->name
== DW_AT_binary_scale
)
18379 LONGEST scale_exp
= attr
->constant_value (0);
18380 gdb_mpz
*num_or_denom
= scale_exp
> 0 ? &scale_num
: &scale_denom
;
18382 mpz_mul_2exp (num_or_denom
->val
, num_or_denom
->val
, std::abs (scale_exp
));
18384 else if (attr
->name
== DW_AT_decimal_scale
)
18386 LONGEST scale_exp
= attr
->constant_value (0);
18387 gdb_mpz
*num_or_denom
= scale_exp
> 0 ? &scale_num
: &scale_denom
;
18389 mpz_ui_pow_ui (num_or_denom
->val
, 10, std::abs (scale_exp
));
18391 else if (attr
->name
== DW_AT_small
)
18393 struct die_info
*scale_die
;
18394 struct dwarf2_cu
*scale_cu
= cu
;
18396 scale_die
= follow_die_ref (die
, attr
, &scale_cu
);
18397 if (scale_die
->tag
== DW_TAG_constant
)
18398 get_dwarf2_unsigned_rational_constant (scale_die
, scale_cu
,
18399 &scale_num
, &scale_denom
);
18401 complaint (_("%s DIE not supported as target of DW_AT_small attribute"
18403 dwarf_tag_name (die
->tag
), sect_offset_str (die
->sect_off
));
18407 complaint (_("unsupported scale attribute %s for fixed-point type"
18409 dwarf_attr_name (attr
->name
),
18410 sect_offset_str (die
->sect_off
));
18413 gdb_mpq
&scaling_factor
= type
->fixed_point_info ().scaling_factor
;
18414 mpz_set (mpq_numref (scaling_factor
.val
), scale_num
.val
);
18415 mpz_set (mpq_denref (scaling_factor
.val
), scale_denom
.val
);
18416 mpq_canonicalize (scaling_factor
.val
);
18419 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
18420 (which may be different from NAME) to the architecture back-end to allow
18421 it to guess the correct format if necessary. */
18423 static struct type
*
18424 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
18425 const char *name_hint
, enum bfd_endian byte_order
)
18427 struct gdbarch
*gdbarch
= objfile
->arch ();
18428 const struct floatformat
**format
;
18431 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
18433 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
18435 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18440 /* Allocate an integer type of size BITS and name NAME. */
18442 static struct type
*
18443 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
18444 int bits
, int unsigned_p
, const char *name
)
18448 /* Versions of Intel's C Compiler generate an integer type called "void"
18449 instead of using DW_TAG_unspecified_type. This has been seen on
18450 at least versions 14, 17, and 18. */
18451 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
18452 && strcmp (name
, "void") == 0)
18453 type
= objfile_type (objfile
)->builtin_void
;
18455 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
18460 /* Return true if DIE has a DW_AT_small attribute whose value is
18461 a constant rational, where both the numerator and denominator
18464 CU is the DIE's Compilation Unit. */
18467 has_zero_over_zero_small_attribute (struct die_info
*die
,
18468 struct dwarf2_cu
*cu
)
18470 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_small
, cu
);
18471 if (attr
== nullptr)
18474 struct dwarf2_cu
*scale_cu
= cu
;
18475 struct die_info
*scale_die
18476 = follow_die_ref (die
, attr
, &scale_cu
);
18478 if (scale_die
->tag
!= DW_TAG_constant
)
18481 gdb_mpz
num (1), denom (1);
18482 get_dwarf2_rational_constant (scale_die
, cu
, &num
, &denom
);
18483 return mpz_sgn (num
.val
) == 0 && mpz_sgn (denom
.val
) == 0;
18486 /* Initialise and return a floating point type of size BITS suitable for
18487 use as a component of a complex number. The NAME_HINT is passed through
18488 when initialising the floating point type and is the name of the complex
18491 As DWARF doesn't currently provide an explicit name for the components
18492 of a complex number, but it can be helpful to have these components
18493 named, we try to select a suitable name based on the size of the
18495 static struct type
*
18496 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
18497 struct objfile
*objfile
,
18498 int bits
, const char *name_hint
,
18499 enum bfd_endian byte_order
)
18501 gdbarch
*gdbarch
= objfile
->arch ();
18502 struct type
*tt
= nullptr;
18504 /* Try to find a suitable floating point builtin type of size BITS.
18505 We're going to use the name of this type as the name for the complex
18506 target type that we are about to create. */
18507 switch (cu
->language
)
18509 case language_fortran
:
18513 tt
= builtin_f_type (gdbarch
)->builtin_real
;
18516 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
18518 case 96: /* The x86-32 ABI specifies 96-bit long double. */
18520 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
18528 tt
= builtin_type (gdbarch
)->builtin_float
;
18531 tt
= builtin_type (gdbarch
)->builtin_double
;
18533 case 96: /* The x86-32 ABI specifies 96-bit long double. */
18535 tt
= builtin_type (gdbarch
)->builtin_long_double
;
18541 /* If the type we found doesn't match the size we were looking for, then
18542 pretend we didn't find a type at all, the complex target type we
18543 create will then be nameless. */
18544 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
18547 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
18548 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
18551 /* Find a representation of a given base type and install
18552 it in the TYPE field of the die. */
18554 static struct type
*
18555 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18557 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18559 struct attribute
*attr
;
18560 int encoding
= 0, bits
= 0;
18564 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
18565 if (attr
!= nullptr && attr
->form_is_constant ())
18566 encoding
= attr
->constant_value (0);
18567 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
18568 if (attr
!= nullptr)
18569 bits
= attr
->constant_value (0) * TARGET_CHAR_BIT
;
18570 name
= dwarf2_name (die
, cu
);
18572 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
18574 arch
= objfile
->arch ();
18575 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
18577 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
18578 if (attr
!= nullptr && attr
->form_is_constant ())
18580 int endianity
= attr
->constant_value (0);
18585 byte_order
= BFD_ENDIAN_BIG
;
18587 case DW_END_little
:
18588 byte_order
= BFD_ENDIAN_LITTLE
;
18591 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
18596 if ((encoding
== DW_ATE_signed_fixed
|| encoding
== DW_ATE_unsigned_fixed
)
18597 && cu
->language
== language_ada
18598 && has_zero_over_zero_small_attribute (die
, cu
))
18600 /* brobecker/2018-02-24: This is a fixed point type for which
18601 the scaling factor is represented as fraction whose value
18602 does not make sense (zero divided by zero), so we should
18603 normally never see these. However, there is a small category
18604 of fixed point types for which GNAT is unable to provide
18605 the scaling factor via the standard DWARF mechanisms, and
18606 for which the info is provided via the GNAT encodings instead.
18607 This is likely what this DIE is about.
18609 Ideally, GNAT should be declaring this type the same way
18610 it declares other fixed point types when using the legacy
18611 GNAT encoding, which is to use a simple signed or unsigned
18612 base type. A report to the GNAT team has been created to
18613 look into it. In the meantime, pretend this type is a simple
18614 signed or unsigned integral, rather than a fixed point type,
18615 to avoid any confusion later on as to how to process this type. */
18616 encoding
= (encoding
== DW_ATE_signed_fixed
18618 : DW_ATE_unsigned
);
18623 case DW_ATE_address
:
18624 /* Turn DW_ATE_address into a void * pointer. */
18625 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
18626 type
= init_pointer_type (objfile
, bits
, name
, type
);
18628 case DW_ATE_boolean
:
18629 type
= init_boolean_type (objfile
, bits
, 1, name
);
18631 case DW_ATE_complex_float
:
18632 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
18634 if (type
->code () == TYPE_CODE_ERROR
)
18636 if (name
== nullptr)
18638 struct obstack
*obstack
18639 = &cu
->per_objfile
->objfile
->objfile_obstack
;
18640 name
= obconcat (obstack
, "_Complex ", type
->name (),
18643 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18646 type
= init_complex_type (name
, type
);
18648 case DW_ATE_decimal_float
:
18649 type
= init_decfloat_type (objfile
, bits
, name
);
18652 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
18654 case DW_ATE_signed
:
18655 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
18657 case DW_ATE_unsigned
:
18658 if (cu
->language
== language_fortran
18660 && startswith (name
, "character("))
18661 type
= init_character_type (objfile
, bits
, 1, name
);
18663 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18665 case DW_ATE_signed_char
:
18666 if (cu
->language
== language_ada
|| cu
->language
== language_m2
18667 || cu
->language
== language_pascal
18668 || cu
->language
== language_fortran
)
18669 type
= init_character_type (objfile
, bits
, 0, name
);
18671 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
18673 case DW_ATE_unsigned_char
:
18674 if (cu
->language
== language_ada
|| cu
->language
== language_m2
18675 || cu
->language
== language_pascal
18676 || cu
->language
== language_fortran
18677 || cu
->language
== language_rust
)
18678 type
= init_character_type (objfile
, bits
, 1, name
);
18680 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18685 type
= builtin_type (arch
)->builtin_char16
;
18686 else if (bits
== 32)
18687 type
= builtin_type (arch
)->builtin_char32
;
18690 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
18692 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18694 return set_die_type (die
, type
, cu
);
18697 case DW_ATE_signed_fixed
:
18698 type
= init_fixed_point_type (objfile
, bits
, 0, name
);
18699 finish_fixed_point_type (type
, die
, cu
);
18701 case DW_ATE_unsigned_fixed
:
18702 type
= init_fixed_point_type (objfile
, bits
, 1, name
);
18703 finish_fixed_point_type (type
, die
, cu
);
18707 complaint (_("unsupported DW_AT_encoding: '%s'"),
18708 dwarf_type_encoding_name (encoding
));
18709 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18713 if (name
&& strcmp (name
, "char") == 0)
18714 type
->set_has_no_signedness (true);
18716 maybe_set_alignment (cu
, die
, type
);
18718 type
->set_endianity_is_not_default (gdbarch_byte_order (arch
) != byte_order
);
18720 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_INT
)
18722 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
18723 if (attr
!= nullptr && attr
->as_unsigned () <= 8 * TYPE_LENGTH (type
))
18725 unsigned real_bit_size
= attr
->as_unsigned ();
18726 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
18727 /* Only use the attributes if they make sense together. */
18728 if (attr
== nullptr
18729 || (attr
->as_unsigned () + real_bit_size
18730 <= 8 * TYPE_LENGTH (type
)))
18732 TYPE_MAIN_TYPE (type
)->type_specific
.int_stuff
.bit_size
18734 if (attr
!= nullptr)
18735 TYPE_MAIN_TYPE (type
)->type_specific
.int_stuff
.bit_offset
18736 = attr
->as_unsigned ();
18741 return set_die_type (die
, type
, cu
);
18744 /* Parse dwarf attribute if it's a block, reference or constant and put the
18745 resulting value of the attribute into struct bound_prop.
18746 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
18749 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
18750 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
18751 struct type
*default_type
)
18753 struct dwarf2_property_baton
*baton
;
18754 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
18755 struct objfile
*objfile
= per_objfile
->objfile
;
18756 struct obstack
*obstack
= &objfile
->objfile_obstack
;
18758 gdb_assert (default_type
!= NULL
);
18760 if (attr
== NULL
|| prop
== NULL
)
18763 if (attr
->form_is_block ())
18765 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18766 baton
->property_type
= default_type
;
18767 baton
->locexpr
.per_cu
= cu
->per_cu
;
18768 baton
->locexpr
.per_objfile
= per_objfile
;
18770 struct dwarf_block
*block
= attr
->as_block ();
18771 baton
->locexpr
.size
= block
->size
;
18772 baton
->locexpr
.data
= block
->data
;
18773 switch (attr
->name
)
18775 case DW_AT_string_length
:
18776 baton
->locexpr
.is_reference
= true;
18779 baton
->locexpr
.is_reference
= false;
18783 prop
->set_locexpr (baton
);
18784 gdb_assert (prop
->baton () != NULL
);
18786 else if (attr
->form_is_ref ())
18788 struct dwarf2_cu
*target_cu
= cu
;
18789 struct die_info
*target_die
;
18790 struct attribute
*target_attr
;
18792 target_die
= follow_die_ref (die
, attr
, &target_cu
);
18793 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
18794 if (target_attr
== NULL
)
18795 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
18797 if (target_attr
== NULL
)
18800 switch (target_attr
->name
)
18802 case DW_AT_location
:
18803 if (target_attr
->form_is_section_offset ())
18805 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18806 baton
->property_type
= die_type (target_die
, target_cu
);
18807 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
18808 prop
->set_loclist (baton
);
18809 gdb_assert (prop
->baton () != NULL
);
18811 else if (target_attr
->form_is_block ())
18813 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18814 baton
->property_type
= die_type (target_die
, target_cu
);
18815 baton
->locexpr
.per_cu
= cu
->per_cu
;
18816 baton
->locexpr
.per_objfile
= per_objfile
;
18817 struct dwarf_block
*block
= target_attr
->as_block ();
18818 baton
->locexpr
.size
= block
->size
;
18819 baton
->locexpr
.data
= block
->data
;
18820 baton
->locexpr
.is_reference
= true;
18821 prop
->set_locexpr (baton
);
18822 gdb_assert (prop
->baton () != NULL
);
18826 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18827 "dynamic property");
18831 case DW_AT_data_member_location
:
18835 if (!handle_data_member_location (target_die
, target_cu
,
18839 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18840 baton
->property_type
= read_type_die (target_die
->parent
,
18842 baton
->offset_info
.offset
= offset
;
18843 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
18844 prop
->set_addr_offset (baton
);
18849 else if (attr
->form_is_constant ())
18850 prop
->set_const_val (attr
->constant_value (0));
18853 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
18854 dwarf2_name (die
, cu
));
18864 dwarf2_per_objfile::int_type (int size_in_bytes
, bool unsigned_p
) const
18866 struct type
*int_type
;
18868 /* Helper macro to examine the various builtin types. */
18869 #define TRY_TYPE(F) \
18870 int_type = (unsigned_p \
18871 ? objfile_type (objfile)->builtin_unsigned_ ## F \
18872 : objfile_type (objfile)->builtin_ ## F); \
18873 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
18880 TRY_TYPE (long_long
);
18884 gdb_assert_not_reached ("unable to find suitable integer type");
18890 dwarf2_cu::addr_sized_int_type (bool unsigned_p
) const
18892 int addr_size
= this->per_cu
->addr_size ();
18893 return this->per_objfile
->int_type (addr_size
, unsigned_p
);
18896 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
18897 present (which is valid) then compute the default type based on the
18898 compilation units address size. */
18900 static struct type
*
18901 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18903 struct type
*index_type
= die_type (die
, cu
);
18905 /* Dwarf-2 specifications explicitly allows to create subrange types
18906 without specifying a base type.
18907 In that case, the base type must be set to the type of
18908 the lower bound, upper bound or count, in that order, if any of these
18909 three attributes references an object that has a type.
18910 If no base type is found, the Dwarf-2 specifications say that
18911 a signed integer type of size equal to the size of an address should
18913 For the following C code: `extern char gdb_int [];'
18914 GCC produces an empty range DIE.
18915 FIXME: muller/2010-05-28: Possible references to object for low bound,
18916 high bound or count are not yet handled by this code. */
18917 if (index_type
->code () == TYPE_CODE_VOID
)
18918 index_type
= cu
->addr_sized_int_type (false);
18923 /* Read the given DW_AT_subrange DIE. */
18925 static struct type
*
18926 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18928 struct type
*base_type
, *orig_base_type
;
18929 struct type
*range_type
;
18930 struct attribute
*attr
;
18931 struct dynamic_prop low
, high
;
18932 int low_default_is_valid
;
18933 int high_bound_is_count
= 0;
18935 ULONGEST negative_mask
;
18937 orig_base_type
= read_subrange_index_type (die
, cu
);
18939 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
18940 whereas the real type might be. So, we use ORIG_BASE_TYPE when
18941 creating the range type, but we use the result of check_typedef
18942 when examining properties of the type. */
18943 base_type
= check_typedef (orig_base_type
);
18945 /* The die_type call above may have already set the type for this DIE. */
18946 range_type
= get_die_type (die
, cu
);
18950 high
.set_const_val (0);
18952 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
18953 omitting DW_AT_lower_bound. */
18954 switch (cu
->language
)
18957 case language_cplus
:
18958 low
.set_const_val (0);
18959 low_default_is_valid
= 1;
18961 case language_fortran
:
18962 low
.set_const_val (1);
18963 low_default_is_valid
= 1;
18966 case language_objc
:
18967 case language_rust
:
18968 low
.set_const_val (0);
18969 low_default_is_valid
= (cu
->header
.version
>= 4);
18973 case language_pascal
:
18974 low
.set_const_val (1);
18975 low_default_is_valid
= (cu
->header
.version
>= 4);
18978 low
.set_const_val (0);
18979 low_default_is_valid
= 0;
18983 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
18984 if (attr
!= nullptr)
18985 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
18986 else if (!low_default_is_valid
)
18987 complaint (_("Missing DW_AT_lower_bound "
18988 "- DIE at %s [in module %s]"),
18989 sect_offset_str (die
->sect_off
),
18990 objfile_name (cu
->per_objfile
->objfile
));
18992 struct attribute
*attr_ub
, *attr_count
;
18993 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
18994 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18996 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
18997 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18999 /* If bounds are constant do the final calculation here. */
19000 if (low
.kind () == PROP_CONST
&& high
.kind () == PROP_CONST
)
19001 high
.set_const_val (low
.const_val () + high
.const_val () - 1);
19003 high_bound_is_count
= 1;
19007 if (attr_ub
!= NULL
)
19008 complaint (_("Unresolved DW_AT_upper_bound "
19009 "- DIE at %s [in module %s]"),
19010 sect_offset_str (die
->sect_off
),
19011 objfile_name (cu
->per_objfile
->objfile
));
19012 if (attr_count
!= NULL
)
19013 complaint (_("Unresolved DW_AT_count "
19014 "- DIE at %s [in module %s]"),
19015 sect_offset_str (die
->sect_off
),
19016 objfile_name (cu
->per_objfile
->objfile
));
19021 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
19022 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
19023 bias
= bias_attr
->constant_value (0);
19025 /* Normally, the DWARF producers are expected to use a signed
19026 constant form (Eg. DW_FORM_sdata) to express negative bounds.
19027 But this is unfortunately not always the case, as witnessed
19028 with GCC, for instance, where the ambiguous DW_FORM_dataN form
19029 is used instead. To work around that ambiguity, we treat
19030 the bounds as signed, and thus sign-extend their values, when
19031 the base type is signed. */
19033 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
19034 if (low
.kind () == PROP_CONST
19035 && !base_type
->is_unsigned () && (low
.const_val () & negative_mask
))
19036 low
.set_const_val (low
.const_val () | negative_mask
);
19037 if (high
.kind () == PROP_CONST
19038 && !base_type
->is_unsigned () && (high
.const_val () & negative_mask
))
19039 high
.set_const_val (high
.const_val () | negative_mask
);
19041 /* Check for bit and byte strides. */
19042 struct dynamic_prop byte_stride_prop
;
19043 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
19044 if (attr_byte_stride
!= nullptr)
19046 struct type
*prop_type
= cu
->addr_sized_int_type (false);
19047 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
19051 struct dynamic_prop bit_stride_prop
;
19052 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
19053 if (attr_bit_stride
!= nullptr)
19055 /* It only makes sense to have either a bit or byte stride. */
19056 if (attr_byte_stride
!= nullptr)
19058 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
19059 "- DIE at %s [in module %s]"),
19060 sect_offset_str (die
->sect_off
),
19061 objfile_name (cu
->per_objfile
->objfile
));
19062 attr_bit_stride
= nullptr;
19066 struct type
*prop_type
= cu
->addr_sized_int_type (false);
19067 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
19072 if (attr_byte_stride
!= nullptr
19073 || attr_bit_stride
!= nullptr)
19075 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
19076 struct dynamic_prop
*stride
19077 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
19080 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
19081 &high
, bias
, stride
, byte_stride_p
);
19084 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
19086 if (high_bound_is_count
)
19087 range_type
->bounds ()->flag_upper_bound_is_count
= 1;
19089 /* Ada expects an empty array on no boundary attributes. */
19090 if (attr
== NULL
&& cu
->language
!= language_ada
)
19091 range_type
->bounds ()->high
.set_undefined ();
19093 name
= dwarf2_name (die
, cu
);
19095 range_type
->set_name (name
);
19097 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
19098 if (attr
!= nullptr)
19099 TYPE_LENGTH (range_type
) = attr
->constant_value (0);
19101 maybe_set_alignment (cu
, die
, range_type
);
19103 set_die_type (die
, range_type
, cu
);
19105 /* set_die_type should be already done. */
19106 set_descriptive_type (range_type
, die
, cu
);
19111 static struct type
*
19112 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19116 type
= init_type (cu
->per_objfile
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
19117 type
->set_name (dwarf2_name (die
, cu
));
19119 /* In Ada, an unspecified type is typically used when the description
19120 of the type is deferred to a different unit. When encountering
19121 such a type, we treat it as a stub, and try to resolve it later on,
19123 if (cu
->language
== language_ada
)
19124 type
->set_is_stub (true);
19126 return set_die_type (die
, type
, cu
);
19129 /* Read a single die and all its descendents. Set the die's sibling
19130 field to NULL; set other fields in the die correctly, and set all
19131 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
19132 location of the info_ptr after reading all of those dies. PARENT
19133 is the parent of the die in question. */
19135 static struct die_info
*
19136 read_die_and_children (const struct die_reader_specs
*reader
,
19137 const gdb_byte
*info_ptr
,
19138 const gdb_byte
**new_info_ptr
,
19139 struct die_info
*parent
)
19141 struct die_info
*die
;
19142 const gdb_byte
*cur_ptr
;
19144 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
19147 *new_info_ptr
= cur_ptr
;
19150 store_in_ref_table (die
, reader
->cu
);
19152 if (die
->has_children
)
19153 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
19157 *new_info_ptr
= cur_ptr
;
19160 die
->sibling
= NULL
;
19161 die
->parent
= parent
;
19165 /* Read a die, all of its descendents, and all of its siblings; set
19166 all of the fields of all of the dies correctly. Arguments are as
19167 in read_die_and_children. */
19169 static struct die_info
*
19170 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
19171 const gdb_byte
*info_ptr
,
19172 const gdb_byte
**new_info_ptr
,
19173 struct die_info
*parent
)
19175 struct die_info
*first_die
, *last_sibling
;
19176 const gdb_byte
*cur_ptr
;
19178 cur_ptr
= info_ptr
;
19179 first_die
= last_sibling
= NULL
;
19183 struct die_info
*die
19184 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
19188 *new_info_ptr
= cur_ptr
;
19195 last_sibling
->sibling
= die
;
19197 last_sibling
= die
;
19201 /* Read a die, all of its descendents, and all of its siblings; set
19202 all of the fields of all of the dies correctly. Arguments are as
19203 in read_die_and_children.
19204 This the main entry point for reading a DIE and all its children. */
19206 static struct die_info
*
19207 read_die_and_siblings (const struct die_reader_specs
*reader
,
19208 const gdb_byte
*info_ptr
,
19209 const gdb_byte
**new_info_ptr
,
19210 struct die_info
*parent
)
19212 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
19213 new_info_ptr
, parent
);
19215 if (dwarf_die_debug
)
19217 fprintf_unfiltered (gdb_stdlog
,
19218 "Read die from %s@0x%x of %s:\n",
19219 reader
->die_section
->get_name (),
19220 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
19221 bfd_get_filename (reader
->abfd
));
19222 dump_die (die
, dwarf_die_debug
);
19228 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
19230 The caller is responsible for filling in the extra attributes
19231 and updating (*DIEP)->num_attrs.
19232 Set DIEP to point to a newly allocated die with its information,
19233 except for its child, sibling, and parent fields. */
19235 static const gdb_byte
*
19236 read_full_die_1 (const struct die_reader_specs
*reader
,
19237 struct die_info
**diep
, const gdb_byte
*info_ptr
,
19238 int num_extra_attrs
)
19240 unsigned int abbrev_number
, bytes_read
, i
;
19241 struct abbrev_info
*abbrev
;
19242 struct die_info
*die
;
19243 struct dwarf2_cu
*cu
= reader
->cu
;
19244 bfd
*abfd
= reader
->abfd
;
19246 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
19247 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19248 info_ptr
+= bytes_read
;
19249 if (!abbrev_number
)
19255 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
19257 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
19259 bfd_get_filename (abfd
));
19261 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
19262 die
->sect_off
= sect_off
;
19263 die
->tag
= abbrev
->tag
;
19264 die
->abbrev
= abbrev_number
;
19265 die
->has_children
= abbrev
->has_children
;
19267 /* Make the result usable.
19268 The caller needs to update num_attrs after adding the extra
19270 die
->num_attrs
= abbrev
->num_attrs
;
19272 bool any_need_reprocess
= false;
19273 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
19275 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
19277 if (die
->attrs
[i
].requires_reprocessing_p ())
19278 any_need_reprocess
= true;
19281 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
19282 if (attr
!= nullptr && attr
->form_is_unsigned ())
19283 cu
->str_offsets_base
= attr
->as_unsigned ();
19285 attr
= die
->attr (DW_AT_loclists_base
);
19286 if (attr
!= nullptr)
19287 cu
->loclist_base
= attr
->as_unsigned ();
19289 auto maybe_addr_base
= die
->addr_base ();
19290 if (maybe_addr_base
.has_value ())
19291 cu
->addr_base
= *maybe_addr_base
;
19293 attr
= die
->attr (DW_AT_rnglists_base
);
19294 if (attr
!= nullptr)
19295 cu
->ranges_base
= attr
->as_unsigned ();
19297 if (any_need_reprocess
)
19299 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
19301 if (die
->attrs
[i
].requires_reprocessing_p ())
19302 read_attribute_reprocess (reader
, &die
->attrs
[i
], die
->tag
);
19309 /* Read a die and all its attributes.
19310 Set DIEP to point to a newly allocated die with its information,
19311 except for its child, sibling, and parent fields. */
19313 static const gdb_byte
*
19314 read_full_die (const struct die_reader_specs
*reader
,
19315 struct die_info
**diep
, const gdb_byte
*info_ptr
)
19317 const gdb_byte
*result
;
19319 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
19321 if (dwarf_die_debug
)
19323 fprintf_unfiltered (gdb_stdlog
,
19324 "Read die from %s@0x%x of %s:\n",
19325 reader
->die_section
->get_name (),
19326 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
19327 bfd_get_filename (reader
->abfd
));
19328 dump_die (*diep
, dwarf_die_debug
);
19335 /* Returns nonzero if TAG represents a type that we might generate a partial
19339 is_type_tag_for_partial (int tag
, enum language lang
)
19344 /* Some types that would be reasonable to generate partial symbols for,
19345 that we don't at present. Note that normally this does not
19346 matter, mainly because C compilers don't give names to these
19347 types, but instead emit DW_TAG_typedef. */
19348 case DW_TAG_file_type
:
19349 case DW_TAG_ptr_to_member_type
:
19350 case DW_TAG_set_type
:
19351 case DW_TAG_string_type
:
19352 case DW_TAG_subroutine_type
:
19355 /* GNAT may emit an array with a name, but no typedef, so we
19356 need to make a symbol in this case. */
19357 case DW_TAG_array_type
:
19358 return lang
== language_ada
;
19360 case DW_TAG_base_type
:
19361 case DW_TAG_class_type
:
19362 case DW_TAG_interface_type
:
19363 case DW_TAG_enumeration_type
:
19364 case DW_TAG_structure_type
:
19365 case DW_TAG_subrange_type
:
19366 case DW_TAG_typedef
:
19367 case DW_TAG_union_type
:
19374 /* Load all DIEs that are interesting for partial symbols into memory. */
19376 static struct partial_die_info
*
19377 load_partial_dies (const struct die_reader_specs
*reader
,
19378 const gdb_byte
*info_ptr
, int building_psymtab
)
19380 struct dwarf2_cu
*cu
= reader
->cu
;
19381 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19382 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
19383 unsigned int bytes_read
;
19384 unsigned int load_all
= 0;
19385 int nesting_level
= 1;
19390 gdb_assert (cu
->per_cu
!= NULL
);
19391 if (cu
->per_cu
->load_all_dies
)
19395 = htab_create_alloc_ex (cu
->header
.length
/ 12,
19399 &cu
->comp_unit_obstack
,
19400 hashtab_obstack_allocate
,
19401 dummy_obstack_deallocate
);
19405 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
19407 /* A NULL abbrev means the end of a series of children. */
19408 if (abbrev
== NULL
)
19410 if (--nesting_level
== 0)
19413 info_ptr
+= bytes_read
;
19414 last_die
= parent_die
;
19415 parent_die
= parent_die
->die_parent
;
19419 /* Check for template arguments. We never save these; if
19420 they're seen, we just mark the parent, and go on our way. */
19421 if (parent_die
!= NULL
19422 && cu
->language
== language_cplus
19423 && (abbrev
->tag
== DW_TAG_template_type_param
19424 || abbrev
->tag
== DW_TAG_template_value_param
))
19426 parent_die
->has_template_arguments
= 1;
19430 /* We don't need a partial DIE for the template argument. */
19431 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
19436 /* We only recurse into c++ subprograms looking for template arguments.
19437 Skip their other children. */
19439 && cu
->language
== language_cplus
19440 && parent_die
!= NULL
19441 && parent_die
->tag
== DW_TAG_subprogram
19442 && abbrev
->tag
!= DW_TAG_inlined_subroutine
)
19444 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
19448 /* Check whether this DIE is interesting enough to save. Normally
19449 we would not be interested in members here, but there may be
19450 later variables referencing them via DW_AT_specification (for
19451 static members). */
19453 && !is_type_tag_for_partial (abbrev
->tag
, cu
->language
)
19454 && abbrev
->tag
!= DW_TAG_constant
19455 && abbrev
->tag
!= DW_TAG_enumerator
19456 && abbrev
->tag
!= DW_TAG_subprogram
19457 && abbrev
->tag
!= DW_TAG_inlined_subroutine
19458 && abbrev
->tag
!= DW_TAG_lexical_block
19459 && abbrev
->tag
!= DW_TAG_variable
19460 && abbrev
->tag
!= DW_TAG_namespace
19461 && abbrev
->tag
!= DW_TAG_module
19462 && abbrev
->tag
!= DW_TAG_member
19463 && abbrev
->tag
!= DW_TAG_imported_unit
19464 && abbrev
->tag
!= DW_TAG_imported_declaration
)
19466 /* Otherwise we skip to the next sibling, if any. */
19467 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
19471 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
19474 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
19476 /* This two-pass algorithm for processing partial symbols has a
19477 high cost in cache pressure. Thus, handle some simple cases
19478 here which cover the majority of C partial symbols. DIEs
19479 which neither have specification tags in them, nor could have
19480 specification tags elsewhere pointing at them, can simply be
19481 processed and discarded.
19483 This segment is also optional; scan_partial_symbols and
19484 add_partial_symbol will handle these DIEs if we chain
19485 them in normally. When compilers which do not emit large
19486 quantities of duplicate debug information are more common,
19487 this code can probably be removed. */
19489 /* Any complete simple types at the top level (pretty much all
19490 of them, for a language without namespaces), can be processed
19492 if (parent_die
== NULL
19493 && pdi
.has_specification
== 0
19494 && pdi
.is_declaration
== 0
19495 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
19496 || pdi
.tag
== DW_TAG_base_type
19497 || pdi
.tag
== DW_TAG_array_type
19498 || pdi
.tag
== DW_TAG_subrange_type
))
19500 if (building_psymtab
&& pdi
.raw_name
!= NULL
)
19501 add_partial_symbol (&pdi
, cu
);
19503 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
19507 /* The exception for DW_TAG_typedef with has_children above is
19508 a workaround of GCC PR debug/47510. In the case of this complaint
19509 type_name_or_error will error on such types later.
19511 GDB skipped children of DW_TAG_typedef by the shortcut above and then
19512 it could not find the child DIEs referenced later, this is checked
19513 above. In correct DWARF DW_TAG_typedef should have no children. */
19515 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
19516 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
19517 "- DIE at %s [in module %s]"),
19518 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
19520 /* If we're at the second level, and we're an enumerator, and
19521 our parent has no specification (meaning possibly lives in a
19522 namespace elsewhere), then we can add the partial symbol now
19523 instead of queueing it. */
19524 if (pdi
.tag
== DW_TAG_enumerator
19525 && parent_die
!= NULL
19526 && parent_die
->die_parent
== NULL
19527 && parent_die
->tag
== DW_TAG_enumeration_type
19528 && parent_die
->has_specification
== 0)
19530 if (pdi
.raw_name
== NULL
)
19531 complaint (_("malformed enumerator DIE ignored"));
19532 else if (building_psymtab
)
19533 add_partial_symbol (&pdi
, cu
);
19535 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
19539 struct partial_die_info
*part_die
19540 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
19542 /* We'll save this DIE so link it in. */
19543 part_die
->die_parent
= parent_die
;
19544 part_die
->die_sibling
= NULL
;
19545 part_die
->die_child
= NULL
;
19547 if (last_die
&& last_die
== parent_die
)
19548 last_die
->die_child
= part_die
;
19550 last_die
->die_sibling
= part_die
;
19552 last_die
= part_die
;
19554 if (first_die
== NULL
)
19555 first_die
= part_die
;
19557 /* Maybe add the DIE to the hash table. Not all DIEs that we
19558 find interesting need to be in the hash table, because we
19559 also have the parent/sibling/child chains; only those that we
19560 might refer to by offset later during partial symbol reading.
19562 For now this means things that might have be the target of a
19563 DW_AT_specification, DW_AT_abstract_origin, or
19564 DW_AT_extension. DW_AT_extension will refer only to
19565 namespaces; DW_AT_abstract_origin refers to functions (and
19566 many things under the function DIE, but we do not recurse
19567 into function DIEs during partial symbol reading) and
19568 possibly variables as well; DW_AT_specification refers to
19569 declarations. Declarations ought to have the DW_AT_declaration
19570 flag. It happens that GCC forgets to put it in sometimes, but
19571 only for functions, not for types.
19573 Adding more things than necessary to the hash table is harmless
19574 except for the performance cost. Adding too few will result in
19575 wasted time in find_partial_die, when we reread the compilation
19576 unit with load_all_dies set. */
19579 || abbrev
->tag
== DW_TAG_constant
19580 || abbrev
->tag
== DW_TAG_subprogram
19581 || abbrev
->tag
== DW_TAG_variable
19582 || abbrev
->tag
== DW_TAG_namespace
19583 || part_die
->is_declaration
)
19587 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
19588 to_underlying (part_die
->sect_off
),
19593 /* For some DIEs we want to follow their children (if any). For C
19594 we have no reason to follow the children of structures; for other
19595 languages we have to, so that we can get at method physnames
19596 to infer fully qualified class names, for DW_AT_specification,
19597 and for C++ template arguments. For C++, we also look one level
19598 inside functions to find template arguments (if the name of the
19599 function does not already contain the template arguments).
19601 For Ada and Fortran, we need to scan the children of subprograms
19602 and lexical blocks as well because these languages allow the
19603 definition of nested entities that could be interesting for the
19604 debugger, such as nested subprograms for instance. */
19605 if (last_die
->has_children
19607 || last_die
->tag
== DW_TAG_namespace
19608 || last_die
->tag
== DW_TAG_module
19609 || last_die
->tag
== DW_TAG_enumeration_type
19610 || (cu
->language
== language_cplus
19611 && last_die
->tag
== DW_TAG_subprogram
19612 && (last_die
->raw_name
== NULL
19613 || strchr (last_die
->raw_name
, '<') == NULL
))
19614 || (cu
->language
!= language_c
19615 && (last_die
->tag
== DW_TAG_class_type
19616 || last_die
->tag
== DW_TAG_interface_type
19617 || last_die
->tag
== DW_TAG_structure_type
19618 || last_die
->tag
== DW_TAG_union_type
))
19619 || ((cu
->language
== language_ada
19620 || cu
->language
== language_fortran
)
19621 && (last_die
->tag
== DW_TAG_subprogram
19622 || last_die
->tag
== DW_TAG_lexical_block
))))
19625 parent_die
= last_die
;
19629 /* Otherwise we skip to the next sibling, if any. */
19630 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
19632 /* Back to the top, do it again. */
19636 partial_die_info::partial_die_info (sect_offset sect_off_
,
19637 struct abbrev_info
*abbrev
)
19638 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
19642 /* See class definition. */
19645 partial_die_info::name (dwarf2_cu
*cu
)
19647 if (!canonical_name
&& raw_name
!= nullptr)
19649 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19650 raw_name
= dwarf2_canonicalize_name (raw_name
, cu
, objfile
);
19651 canonical_name
= 1;
19657 /* Read a minimal amount of information into the minimal die structure.
19658 INFO_PTR should point just after the initial uleb128 of a DIE. */
19661 partial_die_info::read (const struct die_reader_specs
*reader
,
19662 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
19664 struct dwarf2_cu
*cu
= reader
->cu
;
19665 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19667 int has_low_pc_attr
= 0;
19668 int has_high_pc_attr
= 0;
19669 int high_pc_relative
= 0;
19671 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
19674 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
19675 /* String and address offsets that need to do the reprocessing have
19676 already been read at this point, so there is no need to wait until
19677 the loop terminates to do the reprocessing. */
19678 if (attr
.requires_reprocessing_p ())
19679 read_attribute_reprocess (reader
, &attr
, tag
);
19680 /* Store the data if it is of an attribute we want to keep in a
19681 partial symbol table. */
19687 case DW_TAG_compile_unit
:
19688 case DW_TAG_partial_unit
:
19689 case DW_TAG_type_unit
:
19690 /* Compilation units have a DW_AT_name that is a filename, not
19691 a source language identifier. */
19692 case DW_TAG_enumeration_type
:
19693 case DW_TAG_enumerator
:
19694 /* These tags always have simple identifiers already; no need
19695 to canonicalize them. */
19696 canonical_name
= 1;
19697 raw_name
= attr
.as_string ();
19700 canonical_name
= 0;
19701 raw_name
= attr
.as_string ();
19705 case DW_AT_linkage_name
:
19706 case DW_AT_MIPS_linkage_name
:
19707 /* Note that both forms of linkage name might appear. We
19708 assume they will be the same, and we only store the last
19710 linkage_name
= attr
.as_string ();
19713 has_low_pc_attr
= 1;
19714 lowpc
= attr
.as_address ();
19716 case DW_AT_high_pc
:
19717 has_high_pc_attr
= 1;
19718 highpc
= attr
.as_address ();
19719 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
19720 high_pc_relative
= 1;
19722 case DW_AT_location
:
19723 /* Support the .debug_loc offsets. */
19724 if (attr
.form_is_block ())
19726 d
.locdesc
= attr
.as_block ();
19728 else if (attr
.form_is_section_offset ())
19730 dwarf2_complex_location_expr_complaint ();
19734 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
19735 "partial symbol information");
19738 case DW_AT_external
:
19739 is_external
= attr
.as_boolean ();
19741 case DW_AT_declaration
:
19742 is_declaration
= attr
.as_boolean ();
19747 case DW_AT_abstract_origin
:
19748 case DW_AT_specification
:
19749 case DW_AT_extension
:
19750 has_specification
= 1;
19751 spec_offset
= attr
.get_ref_die_offset ();
19752 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
19753 || cu
->per_cu
->is_dwz
);
19755 case DW_AT_sibling
:
19756 /* Ignore absolute siblings, they might point outside of
19757 the current compile unit. */
19758 if (attr
.form
== DW_FORM_ref_addr
)
19759 complaint (_("ignoring absolute DW_AT_sibling"));
19762 const gdb_byte
*buffer
= reader
->buffer
;
19763 sect_offset off
= attr
.get_ref_die_offset ();
19764 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
19766 if (sibling_ptr
< info_ptr
)
19767 complaint (_("DW_AT_sibling points backwards"));
19768 else if (sibling_ptr
> reader
->buffer_end
)
19769 reader
->die_section
->overflow_complaint ();
19771 sibling
= sibling_ptr
;
19774 case DW_AT_byte_size
:
19777 case DW_AT_const_value
:
19778 has_const_value
= 1;
19780 case DW_AT_calling_convention
:
19781 /* DWARF doesn't provide a way to identify a program's source-level
19782 entry point. DW_AT_calling_convention attributes are only meant
19783 to describe functions' calling conventions.
19785 However, because it's a necessary piece of information in
19786 Fortran, and before DWARF 4 DW_CC_program was the only
19787 piece of debugging information whose definition refers to
19788 a 'main program' at all, several compilers marked Fortran
19789 main programs with DW_CC_program --- even when those
19790 functions use the standard calling conventions.
19792 Although DWARF now specifies a way to provide this
19793 information, we support this practice for backward
19795 if (attr
.constant_value (0) == DW_CC_program
19796 && cu
->language
== language_fortran
)
19797 main_subprogram
= 1;
19801 LONGEST value
= attr
.constant_value (-1);
19802 if (value
== DW_INL_inlined
19803 || value
== DW_INL_declared_inlined
)
19804 may_be_inlined
= 1;
19809 if (tag
== DW_TAG_imported_unit
)
19811 d
.sect_off
= attr
.get_ref_die_offset ();
19812 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
19813 || cu
->per_cu
->is_dwz
);
19817 case DW_AT_main_subprogram
:
19818 main_subprogram
= attr
.as_boolean ();
19823 /* DW_AT_rnglists_base does not apply to DIEs from the DWO
19824 skeleton. We take advantage of the fact the DW_AT_ranges
19825 does not appear in DW_TAG_compile_unit of DWO files.
19827 Attributes of the form DW_FORM_rnglistx have already had
19828 their value changed by read_rnglist_index and already
19829 include DW_AT_rnglists_base, so don't need to add the ranges
19831 int need_ranges_base
= (tag
!= DW_TAG_compile_unit
19832 && attr
.form
!= DW_FORM_rnglistx
);
19833 /* It would be nice to reuse dwarf2_get_pc_bounds here,
19834 but that requires a full DIE, so instead we just
19836 unsigned int ranges_offset
= (attr
.as_unsigned ()
19837 + (need_ranges_base
19841 /* Value of the DW_AT_ranges attribute is the offset in the
19842 .debug_ranges section. */
19843 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
19854 /* For Ada, if both the name and the linkage name appear, we prefer
19855 the latter. This lets "catch exception" work better, regardless
19856 of the order in which the name and linkage name were emitted.
19857 Really, though, this is just a workaround for the fact that gdb
19858 doesn't store both the name and the linkage name. */
19859 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
19860 raw_name
= linkage_name
;
19862 if (high_pc_relative
)
19865 if (has_low_pc_attr
&& has_high_pc_attr
)
19867 /* When using the GNU linker, .gnu.linkonce. sections are used to
19868 eliminate duplicate copies of functions and vtables and such.
19869 The linker will arbitrarily choose one and discard the others.
19870 The AT_*_pc values for such functions refer to local labels in
19871 these sections. If the section from that file was discarded, the
19872 labels are not in the output, so the relocs get a value of 0.
19873 If this is a discarded function, mark the pc bounds as invalid,
19874 so that GDB will ignore it. */
19875 if (lowpc
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
19877 struct objfile
*objfile
= per_objfile
->objfile
;
19878 struct gdbarch
*gdbarch
= objfile
->arch ();
19880 complaint (_("DW_AT_low_pc %s is zero "
19881 "for DIE at %s [in module %s]"),
19882 paddress (gdbarch
, lowpc
),
19883 sect_offset_str (sect_off
),
19884 objfile_name (objfile
));
19886 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
19887 else if (lowpc
>= highpc
)
19889 struct objfile
*objfile
= per_objfile
->objfile
;
19890 struct gdbarch
*gdbarch
= objfile
->arch ();
19892 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
19893 "for DIE at %s [in module %s]"),
19894 paddress (gdbarch
, lowpc
),
19895 paddress (gdbarch
, highpc
),
19896 sect_offset_str (sect_off
),
19897 objfile_name (objfile
));
19906 /* Find a cached partial DIE at OFFSET in CU. */
19908 struct partial_die_info
*
19909 dwarf2_cu::find_partial_die (sect_offset sect_off
)
19911 struct partial_die_info
*lookup_die
= NULL
;
19912 struct partial_die_info
part_die (sect_off
);
19914 lookup_die
= ((struct partial_die_info
*)
19915 htab_find_with_hash (partial_dies
, &part_die
,
19916 to_underlying (sect_off
)));
19921 /* Find a partial DIE at OFFSET, which may or may not be in CU,
19922 except in the case of .debug_types DIEs which do not reference
19923 outside their CU (they do however referencing other types via
19924 DW_FORM_ref_sig8). */
19926 static const struct cu_partial_die_info
19927 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
19929 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19930 struct objfile
*objfile
= per_objfile
->objfile
;
19931 struct partial_die_info
*pd
= NULL
;
19933 if (offset_in_dwz
== cu
->per_cu
->is_dwz
19934 && cu
->header
.offset_in_cu_p (sect_off
))
19936 pd
= cu
->find_partial_die (sect_off
);
19939 /* We missed recording what we needed.
19940 Load all dies and try again. */
19944 /* TUs don't reference other CUs/TUs (except via type signatures). */
19945 if (cu
->per_cu
->is_debug_types
)
19947 error (_("Dwarf Error: Type Unit at offset %s contains"
19948 " external reference to offset %s [in module %s].\n"),
19949 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
19950 bfd_get_filename (objfile
->obfd
));
19952 dwarf2_per_cu_data
*per_cu
19953 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
19956 cu
= per_objfile
->get_cu (per_cu
);
19957 if (cu
== NULL
|| cu
->partial_dies
== NULL
)
19958 load_partial_comp_unit (per_cu
, per_objfile
, nullptr);
19960 cu
= per_objfile
->get_cu (per_cu
);
19963 pd
= cu
->find_partial_die (sect_off
);
19966 /* If we didn't find it, and not all dies have been loaded,
19967 load them all and try again. */
19969 if (pd
== NULL
&& cu
->per_cu
->load_all_dies
== 0)
19971 cu
->per_cu
->load_all_dies
= 1;
19973 /* This is nasty. When we reread the DIEs, somewhere up the call chain
19974 THIS_CU->cu may already be in use. So we can't just free it and
19975 replace its DIEs with the ones we read in. Instead, we leave those
19976 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
19977 and clobber THIS_CU->cu->partial_dies with the hash table for the new
19979 load_partial_comp_unit (cu
->per_cu
, per_objfile
, cu
);
19981 pd
= cu
->find_partial_die (sect_off
);
19985 error (_("Dwarf Error: Cannot not find DIE at %s [from module %s]\n"),
19986 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
19990 /* See if we can figure out if the class lives in a namespace. We do
19991 this by looking for a member function; its demangled name will
19992 contain namespace info, if there is any. */
19995 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
19996 struct dwarf2_cu
*cu
)
19998 /* NOTE: carlton/2003-10-07: Getting the info this way changes
19999 what template types look like, because the demangler
20000 frequently doesn't give the same name as the debug info. We
20001 could fix this by only using the demangled name to get the
20002 prefix (but see comment in read_structure_type). */
20004 struct partial_die_info
*real_pdi
;
20005 struct partial_die_info
*child_pdi
;
20007 /* If this DIE (this DIE's specification, if any) has a parent, then
20008 we should not do this. We'll prepend the parent's fully qualified
20009 name when we create the partial symbol. */
20011 real_pdi
= struct_pdi
;
20012 while (real_pdi
->has_specification
)
20014 auto res
= find_partial_die (real_pdi
->spec_offset
,
20015 real_pdi
->spec_is_dwz
, cu
);
20016 real_pdi
= res
.pdi
;
20020 if (real_pdi
->die_parent
!= NULL
)
20023 for (child_pdi
= struct_pdi
->die_child
;
20025 child_pdi
= child_pdi
->die_sibling
)
20027 if (child_pdi
->tag
== DW_TAG_subprogram
20028 && child_pdi
->linkage_name
!= NULL
)
20030 gdb::unique_xmalloc_ptr
<char> actual_class_name
20031 (cu
->language_defn
->class_name_from_physname
20032 (child_pdi
->linkage_name
));
20033 if (actual_class_name
!= NULL
)
20035 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20036 struct_pdi
->raw_name
= objfile
->intern (actual_class_name
.get ());
20037 struct_pdi
->canonical_name
= 1;
20044 /* Return true if a DIE with TAG may have the DW_AT_const_value
20048 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
20052 case DW_TAG_constant
:
20053 case DW_TAG_enumerator
:
20054 case DW_TAG_formal_parameter
:
20055 case DW_TAG_template_value_param
:
20056 case DW_TAG_variable
:
20064 partial_die_info::fixup (struct dwarf2_cu
*cu
)
20066 /* Once we've fixed up a die, there's no point in doing so again.
20067 This also avoids a memory leak if we were to call
20068 guess_partial_die_structure_name multiple times. */
20072 /* If we found a reference attribute and the DIE has no name, try
20073 to find a name in the referred to DIE. */
20075 if (raw_name
== NULL
&& has_specification
)
20077 struct partial_die_info
*spec_die
;
20079 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
20080 spec_die
= res
.pdi
;
20083 spec_die
->fixup (cu
);
20085 if (spec_die
->raw_name
)
20087 raw_name
= spec_die
->raw_name
;
20088 canonical_name
= spec_die
->canonical_name
;
20090 /* Copy DW_AT_external attribute if it is set. */
20091 if (spec_die
->is_external
)
20092 is_external
= spec_die
->is_external
;
20096 if (!has_const_value
&& has_specification
20097 && can_have_DW_AT_const_value_p (tag
))
20099 struct partial_die_info
*spec_die
;
20101 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
20102 spec_die
= res
.pdi
;
20105 spec_die
->fixup (cu
);
20107 if (spec_die
->has_const_value
)
20109 /* Copy DW_AT_const_value attribute if it is set. */
20110 has_const_value
= spec_die
->has_const_value
;
20114 /* Set default names for some unnamed DIEs. */
20116 if (raw_name
== NULL
&& tag
== DW_TAG_namespace
)
20118 raw_name
= CP_ANONYMOUS_NAMESPACE_STR
;
20119 canonical_name
= 1;
20122 /* If there is no parent die to provide a namespace, and there are
20123 children, see if we can determine the namespace from their linkage
20125 if (cu
->language
== language_cplus
20126 && !cu
->per_objfile
->per_bfd
->types
.empty ()
20127 && die_parent
== NULL
20129 && (tag
== DW_TAG_class_type
20130 || tag
== DW_TAG_structure_type
20131 || tag
== DW_TAG_union_type
))
20132 guess_partial_die_structure_name (this, cu
);
20134 /* GCC might emit a nameless struct or union that has a linkage
20135 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20136 if (raw_name
== NULL
20137 && (tag
== DW_TAG_class_type
20138 || tag
== DW_TAG_interface_type
20139 || tag
== DW_TAG_structure_type
20140 || tag
== DW_TAG_union_type
)
20141 && linkage_name
!= NULL
)
20143 gdb::unique_xmalloc_ptr
<char> demangled
20144 (gdb_demangle (linkage_name
, DMGL_TYPES
));
20145 if (demangled
!= nullptr)
20149 /* Strip any leading namespaces/classes, keep only the base name.
20150 DW_AT_name for named DIEs does not contain the prefixes. */
20151 base
= strrchr (demangled
.get (), ':');
20152 if (base
&& base
> demangled
.get () && base
[-1] == ':')
20155 base
= demangled
.get ();
20157 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20158 raw_name
= objfile
->intern (base
);
20159 canonical_name
= 1;
20166 /* Read the .debug_loclists or .debug_rnglists header (they are the same format)
20167 contents from the given SECTION in the HEADER. */
20169 read_loclists_rnglists_header (struct loclists_rnglists_header
*header
,
20170 struct dwarf2_section_info
*section
)
20172 unsigned int bytes_read
;
20173 bfd
*abfd
= section
->get_bfd_owner ();
20174 const gdb_byte
*info_ptr
= section
->buffer
;
20175 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
20176 info_ptr
+= bytes_read
;
20177 header
->version
= read_2_bytes (abfd
, info_ptr
);
20179 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
20181 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
20183 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
20186 /* Return the DW_AT_loclists_base value for the CU. */
20188 lookup_loclist_base (struct dwarf2_cu
*cu
)
20190 /* For the .dwo unit, the loclist_base points to the first offset following
20191 the header. The header consists of the following entities-
20192 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
20194 2. version (2 bytes)
20195 3. address size (1 byte)
20196 4. segment selector size (1 byte)
20197 5. offset entry count (4 bytes)
20198 These sizes are derived as per the DWARFv5 standard. */
20199 if (cu
->dwo_unit
!= nullptr)
20201 if (cu
->header
.initial_length_size
== 4)
20202 return LOCLIST_HEADER_SIZE32
;
20203 return LOCLIST_HEADER_SIZE64
;
20205 return cu
->loclist_base
;
20208 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
20209 array of offsets in the .debug_loclists section. */
20211 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
20213 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20214 struct objfile
*objfile
= per_objfile
->objfile
;
20215 bfd
*abfd
= objfile
->obfd
;
20216 ULONGEST loclist_base
= lookup_loclist_base (cu
);
20218 /* Offset in .debug_loclists of the offset for LOCLIST_INDEX. */
20219 ULONGEST start_offset
=
20220 loclist_base
+ loclist_index
* cu
->header
.offset_size
;
20222 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
20224 section
->read (objfile
);
20225 if (section
->buffer
== NULL
)
20226 error (_("DW_FORM_loclistx used without .debug_loclists "
20227 "section [in module %s]"), objfile_name (objfile
));
20229 struct loclists_rnglists_header header
;
20230 read_loclists_rnglists_header (&header
, section
);
20231 if (loclist_index
>= header
.offset_entry_count
)
20232 error (_("DW_FORM_loclistx pointing outside of "
20233 ".debug_loclists offset array [in module %s]"),
20234 objfile_name (objfile
));
20236 if (start_offset
>= section
->size
)
20237 error (_("DW_FORM_loclistx pointing outside of "
20238 ".debug_loclists section [in module %s]"),
20239 objfile_name (objfile
));
20241 /* Validate that reading won't go beyond the end of the section. */
20242 if (start_offset
+ cu
->header
.offset_size
> section
->size
)
20243 error (_("Reading DW_FORM_loclistx index beyond end of"
20244 ".debug_loclists section [in module %s]"),
20245 objfile_name (objfile
));
20247 const gdb_byte
*info_ptr
= section
->buffer
+ start_offset
;
20249 if (cu
->header
.offset_size
== 4)
20250 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
20252 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
20255 /* Given a DW_FORM_rnglistx value RNGLIST_INDEX, fetch the offset from the
20256 array of offsets in the .debug_rnglists section. */
20258 read_rnglist_index (struct dwarf2_cu
*cu
, ULONGEST rnglist_index
,
20261 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
20262 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20263 bfd
*abfd
= objfile
->obfd
;
20264 ULONGEST rnglist_header_size
=
20265 (cu
->header
.initial_length_size
== 4 ? RNGLIST_HEADER_SIZE32
20266 : RNGLIST_HEADER_SIZE64
);
20267 ULONGEST rnglist_base
=
20268 (cu
->dwo_unit
!= nullptr) ? rnglist_header_size
: cu
->ranges_base
;
20270 /* Offset in .debug_rnglists of the offset for RNGLIST_INDEX. */
20271 ULONGEST start_offset
=
20272 rnglist_base
+ rnglist_index
* cu
->header
.offset_size
;
20274 /* Get rnglists section. */
20275 struct dwarf2_section_info
*section
= cu_debug_rnglists_section (cu
, tag
);
20277 /* Read the rnglists section content. */
20278 section
->read (objfile
);
20279 if (section
->buffer
== nullptr)
20280 error (_("DW_FORM_rnglistx used without .debug_rnglists section "
20282 objfile_name (objfile
));
20284 /* Verify the rnglist index is valid. */
20285 struct loclists_rnglists_header header
;
20286 read_loclists_rnglists_header (&header
, section
);
20287 if (rnglist_index
>= header
.offset_entry_count
)
20288 error (_("DW_FORM_rnglistx index pointing outside of "
20289 ".debug_rnglists offset array [in module %s]"),
20290 objfile_name (objfile
));
20292 /* Validate that the offset is within the section's range. */
20293 if (start_offset
>= section
->size
)
20294 error (_("DW_FORM_rnglistx pointing outside of "
20295 ".debug_rnglists section [in module %s]"),
20296 objfile_name (objfile
));
20298 /* Validate that reading won't go beyond the end of the section. */
20299 if (start_offset
+ cu
->header
.offset_size
> section
->size
)
20300 error (_("Reading DW_FORM_rnglistx index beyond end of"
20301 ".debug_rnglists section [in module %s]"),
20302 objfile_name (objfile
));
20304 const gdb_byte
*info_ptr
= section
->buffer
+ start_offset
;
20306 if (cu
->header
.offset_size
== 4)
20307 return read_4_bytes (abfd
, info_ptr
) + rnglist_base
;
20309 return read_8_bytes (abfd
, info_ptr
) + rnglist_base
;
20312 /* Process the attributes that had to be skipped in the first round. These
20313 attributes are the ones that need str_offsets_base or addr_base attributes.
20314 They could not have been processed in the first round, because at the time
20315 the values of str_offsets_base or addr_base may not have been known. */
20317 read_attribute_reprocess (const struct die_reader_specs
*reader
,
20318 struct attribute
*attr
, dwarf_tag tag
)
20320 struct dwarf2_cu
*cu
= reader
->cu
;
20321 switch (attr
->form
)
20323 case DW_FORM_addrx
:
20324 case DW_FORM_GNU_addr_index
:
20325 attr
->set_address (read_addr_index (cu
,
20326 attr
->as_unsigned_reprocess ()));
20328 case DW_FORM_loclistx
:
20329 attr
->set_address (read_loclist_index (cu
, attr
->as_unsigned ()));
20331 case DW_FORM_rnglistx
:
20332 attr
->set_address (read_rnglist_index (cu
, attr
->as_unsigned (), tag
));
20335 case DW_FORM_strx1
:
20336 case DW_FORM_strx2
:
20337 case DW_FORM_strx3
:
20338 case DW_FORM_strx4
:
20339 case DW_FORM_GNU_str_index
:
20341 unsigned int str_index
= attr
->as_unsigned_reprocess ();
20342 gdb_assert (!attr
->canonical_string_p ());
20343 if (reader
->dwo_file
!= NULL
)
20344 attr
->set_string_noncanonical (read_dwo_str_index (reader
,
20347 attr
->set_string_noncanonical (read_stub_str_index (cu
,
20352 gdb_assert_not_reached (_("Unexpected DWARF form."));
20356 /* Read an attribute value described by an attribute form. */
20358 static const gdb_byte
*
20359 read_attribute_value (const struct die_reader_specs
*reader
,
20360 struct attribute
*attr
, unsigned form
,
20361 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
20363 struct dwarf2_cu
*cu
= reader
->cu
;
20364 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20365 struct objfile
*objfile
= per_objfile
->objfile
;
20366 bfd
*abfd
= reader
->abfd
;
20367 struct comp_unit_head
*cu_header
= &cu
->header
;
20368 unsigned int bytes_read
;
20369 struct dwarf_block
*blk
;
20371 attr
->form
= (enum dwarf_form
) form
;
20374 case DW_FORM_ref_addr
:
20375 if (cu
->header
.version
== 2)
20376 attr
->set_unsigned (cu
->header
.read_address (abfd
, info_ptr
,
20379 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
20381 info_ptr
+= bytes_read
;
20383 case DW_FORM_GNU_ref_alt
:
20384 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
20386 info_ptr
+= bytes_read
;
20390 struct gdbarch
*gdbarch
= objfile
->arch ();
20391 CORE_ADDR addr
= cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
20392 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
);
20393 attr
->set_address (addr
);
20394 info_ptr
+= bytes_read
;
20397 case DW_FORM_block2
:
20398 blk
= dwarf_alloc_block (cu
);
20399 blk
->size
= read_2_bytes (abfd
, info_ptr
);
20401 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20402 info_ptr
+= blk
->size
;
20403 attr
->set_block (blk
);
20405 case DW_FORM_block4
:
20406 blk
= dwarf_alloc_block (cu
);
20407 blk
->size
= read_4_bytes (abfd
, info_ptr
);
20409 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20410 info_ptr
+= blk
->size
;
20411 attr
->set_block (blk
);
20413 case DW_FORM_data2
:
20414 attr
->set_unsigned (read_2_bytes (abfd
, info_ptr
));
20417 case DW_FORM_data4
:
20418 attr
->set_unsigned (read_4_bytes (abfd
, info_ptr
));
20421 case DW_FORM_data8
:
20422 attr
->set_unsigned (read_8_bytes (abfd
, info_ptr
));
20425 case DW_FORM_data16
:
20426 blk
= dwarf_alloc_block (cu
);
20428 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
20430 attr
->set_block (blk
);
20432 case DW_FORM_sec_offset
:
20433 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
20435 info_ptr
+= bytes_read
;
20437 case DW_FORM_loclistx
:
20439 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
20441 info_ptr
+= bytes_read
;
20444 case DW_FORM_string
:
20445 attr
->set_string_noncanonical (read_direct_string (abfd
, info_ptr
,
20447 info_ptr
+= bytes_read
;
20450 if (!cu
->per_cu
->is_dwz
)
20452 attr
->set_string_noncanonical
20453 (read_indirect_string (per_objfile
,
20454 abfd
, info_ptr
, cu_header
,
20456 info_ptr
+= bytes_read
;
20460 case DW_FORM_line_strp
:
20461 if (!cu
->per_cu
->is_dwz
)
20463 attr
->set_string_noncanonical
20464 (per_objfile
->read_line_string (info_ptr
, cu_header
,
20466 info_ptr
+= bytes_read
;
20470 case DW_FORM_GNU_strp_alt
:
20472 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
20473 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
20476 attr
->set_string_noncanonical
20477 (dwz
->read_string (objfile
, str_offset
));
20478 info_ptr
+= bytes_read
;
20481 case DW_FORM_exprloc
:
20482 case DW_FORM_block
:
20483 blk
= dwarf_alloc_block (cu
);
20484 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
20485 info_ptr
+= bytes_read
;
20486 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20487 info_ptr
+= blk
->size
;
20488 attr
->set_block (blk
);
20490 case DW_FORM_block1
:
20491 blk
= dwarf_alloc_block (cu
);
20492 blk
->size
= read_1_byte (abfd
, info_ptr
);
20494 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20495 info_ptr
+= blk
->size
;
20496 attr
->set_block (blk
);
20498 case DW_FORM_data1
:
20500 attr
->set_unsigned (read_1_byte (abfd
, info_ptr
));
20503 case DW_FORM_flag_present
:
20504 attr
->set_unsigned (1);
20506 case DW_FORM_sdata
:
20507 attr
->set_signed (read_signed_leb128 (abfd
, info_ptr
, &bytes_read
));
20508 info_ptr
+= bytes_read
;
20510 case DW_FORM_rnglistx
:
20512 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
20514 info_ptr
+= bytes_read
;
20517 case DW_FORM_udata
:
20518 attr
->set_unsigned (read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
20519 info_ptr
+= bytes_read
;
20522 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20523 + read_1_byte (abfd
, info_ptr
)));
20527 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20528 + read_2_bytes (abfd
, info_ptr
)));
20532 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20533 + read_4_bytes (abfd
, info_ptr
)));
20537 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20538 + read_8_bytes (abfd
, info_ptr
)));
20541 case DW_FORM_ref_sig8
:
20542 attr
->set_signature (read_8_bytes (abfd
, info_ptr
));
20545 case DW_FORM_ref_udata
:
20546 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20547 + read_unsigned_leb128 (abfd
, info_ptr
,
20549 info_ptr
+= bytes_read
;
20551 case DW_FORM_indirect
:
20552 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
20553 info_ptr
+= bytes_read
;
20554 if (form
== DW_FORM_implicit_const
)
20556 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
20557 info_ptr
+= bytes_read
;
20559 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
20562 case DW_FORM_implicit_const
:
20563 attr
->set_signed (implicit_const
);
20565 case DW_FORM_addrx
:
20566 case DW_FORM_GNU_addr_index
:
20567 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
20569 info_ptr
+= bytes_read
;
20572 case DW_FORM_strx1
:
20573 case DW_FORM_strx2
:
20574 case DW_FORM_strx3
:
20575 case DW_FORM_strx4
:
20576 case DW_FORM_GNU_str_index
:
20578 ULONGEST str_index
;
20579 if (form
== DW_FORM_strx1
)
20581 str_index
= read_1_byte (abfd
, info_ptr
);
20584 else if (form
== DW_FORM_strx2
)
20586 str_index
= read_2_bytes (abfd
, info_ptr
);
20589 else if (form
== DW_FORM_strx3
)
20591 str_index
= read_3_bytes (abfd
, info_ptr
);
20594 else if (form
== DW_FORM_strx4
)
20596 str_index
= read_4_bytes (abfd
, info_ptr
);
20601 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
20602 info_ptr
+= bytes_read
;
20604 attr
->set_unsigned_reprocess (str_index
);
20608 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
20609 dwarf_form_name (form
),
20610 bfd_get_filename (abfd
));
20614 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
20615 attr
->form
= DW_FORM_GNU_ref_alt
;
20617 /* We have seen instances where the compiler tried to emit a byte
20618 size attribute of -1 which ended up being encoded as an unsigned
20619 0xffffffff. Although 0xffffffff is technically a valid size value,
20620 an object of this size seems pretty unlikely so we can relatively
20621 safely treat these cases as if the size attribute was invalid and
20622 treat them as zero by default. */
20623 if (attr
->name
== DW_AT_byte_size
20624 && form
== DW_FORM_data4
20625 && attr
->as_unsigned () >= 0xffffffff)
20628 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
20629 hex_string (attr
->as_unsigned ()));
20630 attr
->set_unsigned (0);
20636 /* Read an attribute described by an abbreviated attribute. */
20638 static const gdb_byte
*
20639 read_attribute (const struct die_reader_specs
*reader
,
20640 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
20641 const gdb_byte
*info_ptr
)
20643 attr
->name
= abbrev
->name
;
20644 attr
->string_is_canonical
= 0;
20645 attr
->requires_reprocessing
= 0;
20646 return read_attribute_value (reader
, attr
, abbrev
->form
,
20647 abbrev
->implicit_const
, info_ptr
);
20650 /* Return pointer to string at .debug_str offset STR_OFFSET. */
20652 static const char *
20653 read_indirect_string_at_offset (dwarf2_per_objfile
*per_objfile
,
20654 LONGEST str_offset
)
20656 return per_objfile
->per_bfd
->str
.read_string (per_objfile
->objfile
,
20657 str_offset
, "DW_FORM_strp");
20660 /* Return pointer to string at .debug_str offset as read from BUF.
20661 BUF is assumed to be in a compilation unit described by CU_HEADER.
20662 Return *BYTES_READ_PTR count of bytes read from BUF. */
20664 static const char *
20665 read_indirect_string (dwarf2_per_objfile
*per_objfile
, bfd
*abfd
,
20666 const gdb_byte
*buf
,
20667 const struct comp_unit_head
*cu_header
,
20668 unsigned int *bytes_read_ptr
)
20670 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
20672 return read_indirect_string_at_offset (per_objfile
, str_offset
);
20678 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
20679 const struct comp_unit_head
*cu_header
,
20680 unsigned int *bytes_read_ptr
)
20682 bfd
*abfd
= objfile
->obfd
;
20683 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
20685 return per_bfd
->line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
20688 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
20689 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
20690 ADDR_SIZE is the size of addresses from the CU header. */
20693 read_addr_index_1 (dwarf2_per_objfile
*per_objfile
, unsigned int addr_index
,
20694 gdb::optional
<ULONGEST
> addr_base
, int addr_size
)
20696 struct objfile
*objfile
= per_objfile
->objfile
;
20697 bfd
*abfd
= objfile
->obfd
;
20698 const gdb_byte
*info_ptr
;
20699 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
20701 per_objfile
->per_bfd
->addr
.read (objfile
);
20702 if (per_objfile
->per_bfd
->addr
.buffer
== NULL
)
20703 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
20704 objfile_name (objfile
));
20705 if (addr_base_or_zero
+ addr_index
* addr_size
20706 >= per_objfile
->per_bfd
->addr
.size
)
20707 error (_("DW_FORM_addr_index pointing outside of "
20708 ".debug_addr section [in module %s]"),
20709 objfile_name (objfile
));
20710 info_ptr
= (per_objfile
->per_bfd
->addr
.buffer
+ addr_base_or_zero
20711 + addr_index
* addr_size
);
20712 if (addr_size
== 4)
20713 return bfd_get_32 (abfd
, info_ptr
);
20715 return bfd_get_64 (abfd
, info_ptr
);
20718 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
20721 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
20723 return read_addr_index_1 (cu
->per_objfile
, addr_index
,
20724 cu
->addr_base
, cu
->header
.addr_size
);
20727 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
20730 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
20731 unsigned int *bytes_read
)
20733 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
20734 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
20736 return read_addr_index (cu
, addr_index
);
20742 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
,
20743 dwarf2_per_objfile
*per_objfile
,
20744 unsigned int addr_index
)
20746 struct dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
20747 gdb::optional
<ULONGEST
> addr_base
;
20750 /* We need addr_base and addr_size.
20751 If we don't have PER_CU->cu, we have to get it.
20752 Nasty, but the alternative is storing the needed info in PER_CU,
20753 which at this point doesn't seem justified: it's not clear how frequently
20754 it would get used and it would increase the size of every PER_CU.
20755 Entry points like dwarf2_per_cu_addr_size do a similar thing
20756 so we're not in uncharted territory here.
20757 Alas we need to be a bit more complicated as addr_base is contained
20760 We don't need to read the entire CU(/TU).
20761 We just need the header and top level die.
20763 IWBN to use the aging mechanism to let us lazily later discard the CU.
20764 For now we skip this optimization. */
20768 addr_base
= cu
->addr_base
;
20769 addr_size
= cu
->header
.addr_size
;
20773 cutu_reader
reader (per_cu
, per_objfile
, nullptr, nullptr, false);
20774 addr_base
= reader
.cu
->addr_base
;
20775 addr_size
= reader
.cu
->header
.addr_size
;
20778 return read_addr_index_1 (per_objfile
, addr_index
, addr_base
, addr_size
);
20781 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
20782 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
20785 static const char *
20786 read_str_index (struct dwarf2_cu
*cu
,
20787 struct dwarf2_section_info
*str_section
,
20788 struct dwarf2_section_info
*str_offsets_section
,
20789 ULONGEST str_offsets_base
, ULONGEST str_index
)
20791 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20792 struct objfile
*objfile
= per_objfile
->objfile
;
20793 const char *objf_name
= objfile_name (objfile
);
20794 bfd
*abfd
= objfile
->obfd
;
20795 const gdb_byte
*info_ptr
;
20796 ULONGEST str_offset
;
20797 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
20799 str_section
->read (objfile
);
20800 str_offsets_section
->read (objfile
);
20801 if (str_section
->buffer
== NULL
)
20802 error (_("%s used without %s section"
20803 " in CU at offset %s [in module %s]"),
20804 form_name
, str_section
->get_name (),
20805 sect_offset_str (cu
->header
.sect_off
), objf_name
);
20806 if (str_offsets_section
->buffer
== NULL
)
20807 error (_("%s used without %s section"
20808 " in CU at offset %s [in module %s]"),
20809 form_name
, str_section
->get_name (),
20810 sect_offset_str (cu
->header
.sect_off
), objf_name
);
20811 info_ptr
= (str_offsets_section
->buffer
20813 + str_index
* cu
->header
.offset_size
);
20814 if (cu
->header
.offset_size
== 4)
20815 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20817 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20818 if (str_offset
>= str_section
->size
)
20819 error (_("Offset from %s pointing outside of"
20820 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20821 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20822 return (const char *) (str_section
->buffer
+ str_offset
);
20825 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
20827 static const char *
20828 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
20830 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
20831 ? reader
->cu
->header
.addr_size
: 0;
20832 return read_str_index (reader
->cu
,
20833 &reader
->dwo_file
->sections
.str
,
20834 &reader
->dwo_file
->sections
.str_offsets
,
20835 str_offsets_base
, str_index
);
20838 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
20840 static const char *
20841 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
20843 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20844 const char *objf_name
= objfile_name (objfile
);
20845 static const char form_name
[] = "DW_FORM_GNU_str_index";
20846 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
20848 if (!cu
->str_offsets_base
.has_value ())
20849 error (_("%s used in Fission stub without %s"
20850 " in CU at offset 0x%lx [in module %s]"),
20851 form_name
, str_offsets_attr_name
,
20852 (long) cu
->header
.offset_size
, objf_name
);
20854 return read_str_index (cu
,
20855 &cu
->per_objfile
->per_bfd
->str
,
20856 &cu
->per_objfile
->per_bfd
->str_offsets
,
20857 *cu
->str_offsets_base
, str_index
);
20860 /* Return the length of an LEB128 number in BUF. */
20863 leb128_size (const gdb_byte
*buf
)
20865 const gdb_byte
*begin
= buf
;
20871 if ((byte
& 128) == 0)
20872 return buf
- begin
;
20877 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20886 cu
->language
= language_c
;
20889 case DW_LANG_C_plus_plus
:
20890 case DW_LANG_C_plus_plus_11
:
20891 case DW_LANG_C_plus_plus_14
:
20892 cu
->language
= language_cplus
;
20895 cu
->language
= language_d
;
20897 case DW_LANG_Fortran77
:
20898 case DW_LANG_Fortran90
:
20899 case DW_LANG_Fortran95
:
20900 case DW_LANG_Fortran03
:
20901 case DW_LANG_Fortran08
:
20902 cu
->language
= language_fortran
;
20905 cu
->language
= language_go
;
20907 case DW_LANG_Mips_Assembler
:
20908 cu
->language
= language_asm
;
20910 case DW_LANG_Ada83
:
20911 case DW_LANG_Ada95
:
20912 cu
->language
= language_ada
;
20914 case DW_LANG_Modula2
:
20915 cu
->language
= language_m2
;
20917 case DW_LANG_Pascal83
:
20918 cu
->language
= language_pascal
;
20921 cu
->language
= language_objc
;
20924 case DW_LANG_Rust_old
:
20925 cu
->language
= language_rust
;
20927 case DW_LANG_Cobol74
:
20928 case DW_LANG_Cobol85
:
20930 cu
->language
= language_minimal
;
20933 cu
->language_defn
= language_def (cu
->language
);
20936 /* Return the named attribute or NULL if not there. */
20938 static struct attribute
*
20939 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20944 struct attribute
*spec
= NULL
;
20946 for (i
= 0; i
< die
->num_attrs
; ++i
)
20948 if (die
->attrs
[i
].name
== name
)
20949 return &die
->attrs
[i
];
20950 if (die
->attrs
[i
].name
== DW_AT_specification
20951 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20952 spec
= &die
->attrs
[i
];
20958 die
= follow_die_ref (die
, spec
, &cu
);
20964 /* Return the string associated with a string-typed attribute, or NULL if it
20965 is either not found or is of an incorrect type. */
20967 static const char *
20968 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20970 struct attribute
*attr
;
20971 const char *str
= NULL
;
20973 attr
= dwarf2_attr (die
, name
, cu
);
20977 str
= attr
->as_string ();
20978 if (str
== nullptr)
20979 complaint (_("string type expected for attribute %s for "
20980 "DIE at %s in module %s"),
20981 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20982 objfile_name (cu
->per_objfile
->objfile
));
20988 /* Return the dwo name or NULL if not present. If present, it is in either
20989 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
20990 static const char *
20991 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20993 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
20994 if (dwo_name
== nullptr)
20995 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
20999 /* Return non-zero iff the attribute NAME is defined for the given DIE,
21000 and holds a non-zero value. This function should only be used for
21001 DW_FORM_flag or DW_FORM_flag_present attributes. */
21004 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
21006 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
21008 return attr
!= nullptr && attr
->as_boolean ();
21012 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
21014 /* A DIE is a declaration if it has a DW_AT_declaration attribute
21015 which value is non-zero. However, we have to be careful with
21016 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
21017 (via dwarf2_flag_true_p) follows this attribute. So we may
21018 end up accidently finding a declaration attribute that belongs
21019 to a different DIE referenced by the specification attribute,
21020 even though the given DIE does not have a declaration attribute. */
21021 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
21022 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
21025 /* Return the die giving the specification for DIE, if there is
21026 one. *SPEC_CU is the CU containing DIE on input, and the CU
21027 containing the return value on output. If there is no
21028 specification, but there is an abstract origin, that is
21031 static struct die_info
*
21032 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
21034 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
21037 if (spec_attr
== NULL
)
21038 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
21040 if (spec_attr
== NULL
)
21043 return follow_die_ref (die
, spec_attr
, spec_cu
);
21046 /* Stub for free_line_header to match void * callback types. */
21049 free_line_header_voidp (void *arg
)
21051 struct line_header
*lh
= (struct line_header
*) arg
;
21056 /* A convenience function to find the proper .debug_line section for a CU. */
21058 static struct dwarf2_section_info
*
21059 get_debug_line_section (struct dwarf2_cu
*cu
)
21061 struct dwarf2_section_info
*section
;
21062 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21064 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
21066 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
21067 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
21068 else if (cu
->per_cu
->is_dwz
)
21070 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
21072 section
= &dwz
->line
;
21075 section
= &per_objfile
->per_bfd
->line
;
21080 /* Read the statement program header starting at OFFSET in
21081 .debug_line, or .debug_line.dwo. Return a pointer
21082 to a struct line_header, allocated using xmalloc.
21083 Returns NULL if there is a problem reading the header, e.g., if it
21084 has a version we don't understand.
21086 NOTE: the strings in the include directory and file name tables of
21087 the returned object point into the dwarf line section buffer,
21088 and must not be freed. */
21090 static line_header_up
21091 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
21093 struct dwarf2_section_info
*section
;
21094 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21096 section
= get_debug_line_section (cu
);
21097 section
->read (per_objfile
->objfile
);
21098 if (section
->buffer
== NULL
)
21100 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
21101 complaint (_("missing .debug_line.dwo section"));
21103 complaint (_("missing .debug_line section"));
21107 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
21108 per_objfile
, section
, &cu
->header
);
21111 /* Subroutine of dwarf_decode_lines to simplify it.
21112 Return the file name of the psymtab for the given file_entry.
21113 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21114 If space for the result is malloc'd, *NAME_HOLDER will be set.
21115 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
21117 static const char *
21118 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
21119 const dwarf2_psymtab
*pst
,
21120 const char *comp_dir
,
21121 gdb::unique_xmalloc_ptr
<char> *name_holder
)
21123 const char *include_name
= fe
.name
;
21124 const char *include_name_to_compare
= include_name
;
21125 const char *pst_filename
;
21128 const char *dir_name
= fe
.include_dir (lh
);
21130 gdb::unique_xmalloc_ptr
<char> hold_compare
;
21131 if (!IS_ABSOLUTE_PATH (include_name
)
21132 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
21134 /* Avoid creating a duplicate psymtab for PST.
21135 We do this by comparing INCLUDE_NAME and PST_FILENAME.
21136 Before we do the comparison, however, we need to account
21137 for DIR_NAME and COMP_DIR.
21138 First prepend dir_name (if non-NULL). If we still don't
21139 have an absolute path prepend comp_dir (if non-NULL).
21140 However, the directory we record in the include-file's
21141 psymtab does not contain COMP_DIR (to match the
21142 corresponding symtab(s)).
21147 bash$ gcc -g ./hello.c
21148 include_name = "hello.c"
21150 DW_AT_comp_dir = comp_dir = "/tmp"
21151 DW_AT_name = "./hello.c"
21155 if (dir_name
!= NULL
)
21157 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
21158 include_name
, (char *) NULL
));
21159 include_name
= name_holder
->get ();
21160 include_name_to_compare
= include_name
;
21162 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
21164 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
21165 include_name
, (char *) NULL
));
21166 include_name_to_compare
= hold_compare
.get ();
21170 pst_filename
= pst
->filename
;
21171 gdb::unique_xmalloc_ptr
<char> copied_name
;
21172 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
21174 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
21175 pst_filename
, (char *) NULL
));
21176 pst_filename
= copied_name
.get ();
21179 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
21183 return include_name
;
21186 /* State machine to track the state of the line number program. */
21188 class lnp_state_machine
21191 /* Initialize a machine state for the start of a line number
21193 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
21194 bool record_lines_p
);
21196 file_entry
*current_file ()
21198 /* lh->file_names is 0-based, but the file name numbers in the
21199 statement program are 1-based. */
21200 return m_line_header
->file_name_at (m_file
);
21203 /* Record the line in the state machine. END_SEQUENCE is true if
21204 we're processing the end of a sequence. */
21205 void record_line (bool end_sequence
);
21207 /* Check ADDRESS is -1, or zero and less than UNRELOCATED_LOWPC, and if true
21208 nop-out rest of the lines in this sequence. */
21209 void check_line_address (struct dwarf2_cu
*cu
,
21210 const gdb_byte
*line_ptr
,
21211 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
21213 void handle_set_discriminator (unsigned int discriminator
)
21215 m_discriminator
= discriminator
;
21216 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
21219 /* Handle DW_LNE_set_address. */
21220 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
21223 address
+= baseaddr
;
21224 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
21227 /* Handle DW_LNS_advance_pc. */
21228 void handle_advance_pc (CORE_ADDR adjust
);
21230 /* Handle a special opcode. */
21231 void handle_special_opcode (unsigned char op_code
);
21233 /* Handle DW_LNS_advance_line. */
21234 void handle_advance_line (int line_delta
)
21236 advance_line (line_delta
);
21239 /* Handle DW_LNS_set_file. */
21240 void handle_set_file (file_name_index file
);
21242 /* Handle DW_LNS_negate_stmt. */
21243 void handle_negate_stmt ()
21245 m_is_stmt
= !m_is_stmt
;
21248 /* Handle DW_LNS_const_add_pc. */
21249 void handle_const_add_pc ();
21251 /* Handle DW_LNS_fixed_advance_pc. */
21252 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
21254 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21258 /* Handle DW_LNS_copy. */
21259 void handle_copy ()
21261 record_line (false);
21262 m_discriminator
= 0;
21265 /* Handle DW_LNE_end_sequence. */
21266 void handle_end_sequence ()
21268 m_currently_recording_lines
= true;
21272 /* Advance the line by LINE_DELTA. */
21273 void advance_line (int line_delta
)
21275 m_line
+= line_delta
;
21277 if (line_delta
!= 0)
21278 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
21281 struct dwarf2_cu
*m_cu
;
21283 gdbarch
*m_gdbarch
;
21285 /* True if we're recording lines.
21286 Otherwise we're building partial symtabs and are just interested in
21287 finding include files mentioned by the line number program. */
21288 bool m_record_lines_p
;
21290 /* The line number header. */
21291 line_header
*m_line_header
;
21293 /* These are part of the standard DWARF line number state machine,
21294 and initialized according to the DWARF spec. */
21296 unsigned char m_op_index
= 0;
21297 /* The line table index of the current file. */
21298 file_name_index m_file
= 1;
21299 unsigned int m_line
= 1;
21301 /* These are initialized in the constructor. */
21303 CORE_ADDR m_address
;
21305 unsigned int m_discriminator
;
21307 /* Additional bits of state we need to track. */
21309 /* The last file that we called dwarf2_start_subfile for.
21310 This is only used for TLLs. */
21311 unsigned int m_last_file
= 0;
21312 /* The last file a line number was recorded for. */
21313 struct subfile
*m_last_subfile
= NULL
;
21315 /* The address of the last line entry. */
21316 CORE_ADDR m_last_address
;
21318 /* Set to true when a previous line at the same address (using
21319 m_last_address) had m_is_stmt true. This is reset to false when a
21320 line entry at a new address (m_address different to m_last_address) is
21322 bool m_stmt_at_address
= false;
21324 /* When true, record the lines we decode. */
21325 bool m_currently_recording_lines
= false;
21327 /* The last line number that was recorded, used to coalesce
21328 consecutive entries for the same line. This can happen, for
21329 example, when discriminators are present. PR 17276. */
21330 unsigned int m_last_line
= 0;
21331 bool m_line_has_non_zero_discriminator
= false;
21335 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
21337 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
21338 / m_line_header
->maximum_ops_per_instruction
)
21339 * m_line_header
->minimum_instruction_length
);
21340 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21341 m_op_index
= ((m_op_index
+ adjust
)
21342 % m_line_header
->maximum_ops_per_instruction
);
21346 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
21348 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
21349 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
21350 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
21351 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
21352 / m_line_header
->maximum_ops_per_instruction
)
21353 * m_line_header
->minimum_instruction_length
);
21354 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21355 m_op_index
= ((m_op_index
+ adj_opcode_d
)
21356 % m_line_header
->maximum_ops_per_instruction
);
21358 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
21359 advance_line (line_delta
);
21360 record_line (false);
21361 m_discriminator
= 0;
21365 lnp_state_machine::handle_set_file (file_name_index file
)
21369 const file_entry
*fe
= current_file ();
21371 dwarf2_debug_line_missing_file_complaint ();
21372 else if (m_record_lines_p
)
21374 const char *dir
= fe
->include_dir (m_line_header
);
21376 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21377 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
21378 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
21383 lnp_state_machine::handle_const_add_pc ()
21386 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
21389 = (((m_op_index
+ adjust
)
21390 / m_line_header
->maximum_ops_per_instruction
)
21391 * m_line_header
->minimum_instruction_length
);
21393 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21394 m_op_index
= ((m_op_index
+ adjust
)
21395 % m_line_header
->maximum_ops_per_instruction
);
21398 /* Return non-zero if we should add LINE to the line number table.
21399 LINE is the line to add, LAST_LINE is the last line that was added,
21400 LAST_SUBFILE is the subfile for LAST_LINE.
21401 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
21402 had a non-zero discriminator.
21404 We have to be careful in the presence of discriminators.
21405 E.g., for this line:
21407 for (i = 0; i < 100000; i++);
21409 clang can emit four line number entries for that one line,
21410 each with a different discriminator.
21411 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
21413 However, we want gdb to coalesce all four entries into one.
21414 Otherwise the user could stepi into the middle of the line and
21415 gdb would get confused about whether the pc really was in the
21416 middle of the line.
21418 Things are further complicated by the fact that two consecutive
21419 line number entries for the same line is a heuristic used by gcc
21420 to denote the end of the prologue. So we can't just discard duplicate
21421 entries, we have to be selective about it. The heuristic we use is
21422 that we only collapse consecutive entries for the same line if at least
21423 one of those entries has a non-zero discriminator. PR 17276.
21425 Note: Addresses in the line number state machine can never go backwards
21426 within one sequence, thus this coalescing is ok. */
21429 dwarf_record_line_p (struct dwarf2_cu
*cu
,
21430 unsigned int line
, unsigned int last_line
,
21431 int line_has_non_zero_discriminator
,
21432 struct subfile
*last_subfile
)
21434 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
21436 if (line
!= last_line
)
21438 /* Same line for the same file that we've seen already.
21439 As a last check, for pr 17276, only record the line if the line
21440 has never had a non-zero discriminator. */
21441 if (!line_has_non_zero_discriminator
)
21446 /* Use the CU's builder to record line number LINE beginning at
21447 address ADDRESS in the line table of subfile SUBFILE. */
21450 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21451 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
21452 struct dwarf2_cu
*cu
)
21454 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
21456 if (dwarf_line_debug
)
21458 fprintf_unfiltered (gdb_stdlog
,
21459 "Recording line %u, file %s, address %s\n",
21460 line
, lbasename (subfile
->name
),
21461 paddress (gdbarch
, address
));
21465 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
21468 /* Subroutine of dwarf_decode_lines_1 to simplify it.
21469 Mark the end of a set of line number records.
21470 The arguments are the same as for dwarf_record_line_1.
21471 If SUBFILE is NULL the request is ignored. */
21474 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21475 CORE_ADDR address
, struct dwarf2_cu
*cu
)
21477 if (subfile
== NULL
)
21480 if (dwarf_line_debug
)
21482 fprintf_unfiltered (gdb_stdlog
,
21483 "Finishing current line, file %s, address %s\n",
21484 lbasename (subfile
->name
),
21485 paddress (gdbarch
, address
));
21488 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
21492 lnp_state_machine::record_line (bool end_sequence
)
21494 if (dwarf_line_debug
)
21496 fprintf_unfiltered (gdb_stdlog
,
21497 "Processing actual line %u: file %u,"
21498 " address %s, is_stmt %u, discrim %u%s\n",
21500 paddress (m_gdbarch
, m_address
),
21501 m_is_stmt
, m_discriminator
,
21502 (end_sequence
? "\t(end sequence)" : ""));
21505 file_entry
*fe
= current_file ();
21508 dwarf2_debug_line_missing_file_complaint ();
21509 /* For now we ignore lines not starting on an instruction boundary.
21510 But not when processing end_sequence for compatibility with the
21511 previous version of the code. */
21512 else if (m_op_index
== 0 || end_sequence
)
21514 fe
->included_p
= 1;
21515 if (m_record_lines_p
)
21517 /* When we switch files we insert an end maker in the first file,
21518 switch to the second file and add a new line entry. The
21519 problem is that the end marker inserted in the first file will
21520 discard any previous line entries at the same address. If the
21521 line entries in the first file are marked as is-stmt, while
21522 the new line in the second file is non-stmt, then this means
21523 the end marker will discard is-stmt lines so we can have a
21524 non-stmt line. This means that there are less addresses at
21525 which the user can insert a breakpoint.
21527 To improve this we track the last address in m_last_address,
21528 and whether we have seen an is-stmt at this address. Then
21529 when switching files, if we have seen a stmt at the current
21530 address, and we are switching to create a non-stmt line, then
21531 discard the new line. */
21533 = m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ();
21534 bool ignore_this_line
21535 = ((file_changed
&& !end_sequence
&& m_last_address
== m_address
21536 && !m_is_stmt
&& m_stmt_at_address
)
21537 || (!end_sequence
&& m_line
== 0));
21539 if ((file_changed
&& !ignore_this_line
) || end_sequence
)
21541 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
21542 m_currently_recording_lines
? m_cu
: nullptr);
21545 if (!end_sequence
&& !ignore_this_line
)
21547 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
21549 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
21550 m_line_has_non_zero_discriminator
,
21553 buildsym_compunit
*builder
= m_cu
->get_builder ();
21554 dwarf_record_line_1 (m_gdbarch
,
21555 builder
->get_current_subfile (),
21556 m_line
, m_address
, is_stmt
,
21557 m_currently_recording_lines
? m_cu
: nullptr);
21559 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21560 m_last_line
= m_line
;
21565 /* Track whether we have seen any m_is_stmt true at m_address in case we
21566 have multiple line table entries all at m_address. */
21567 if (m_last_address
!= m_address
)
21569 m_stmt_at_address
= false;
21570 m_last_address
= m_address
;
21572 m_stmt_at_address
|= m_is_stmt
;
21575 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
21576 line_header
*lh
, bool record_lines_p
)
21580 m_record_lines_p
= record_lines_p
;
21581 m_line_header
= lh
;
21583 m_currently_recording_lines
= true;
21585 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
21586 was a line entry for it so that the backend has a chance to adjust it
21587 and also record it in case it needs it. This is currently used by MIPS
21588 code, cf. `mips_adjust_dwarf2_line'. */
21589 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
21590 m_is_stmt
= lh
->default_is_stmt
;
21591 m_discriminator
= 0;
21593 m_last_address
= m_address
;
21594 m_stmt_at_address
= false;
21598 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
21599 const gdb_byte
*line_ptr
,
21600 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
21602 /* Linkers resolve a symbolic relocation referencing a GC'd function to 0 or
21603 -1. If ADDRESS is 0, ignoring the opcode will err if the text section is
21604 located at 0x0. In this case, additionally check that if
21605 ADDRESS < UNRELOCATED_LOWPC. */
21607 if ((address
== 0 && address
< unrelocated_lowpc
)
21608 || address
== (CORE_ADDR
) -1)
21610 /* This line table is for a function which has been
21611 GCd by the linker. Ignore it. PR gdb/12528 */
21613 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21614 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
21616 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
21617 line_offset
, objfile_name (objfile
));
21618 m_currently_recording_lines
= false;
21619 /* Note: m_currently_recording_lines is left as false until we see
21620 DW_LNE_end_sequence. */
21624 /* Subroutine of dwarf_decode_lines to simplify it.
21625 Process the line number information in LH.
21626 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21627 program in order to set included_p for every referenced header. */
21630 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21631 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21633 const gdb_byte
*line_ptr
, *extended_end
;
21634 const gdb_byte
*line_end
;
21635 unsigned int bytes_read
, extended_len
;
21636 unsigned char op_code
, extended_op
;
21637 CORE_ADDR baseaddr
;
21638 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21639 bfd
*abfd
= objfile
->obfd
;
21640 struct gdbarch
*gdbarch
= objfile
->arch ();
21641 /* True if we're recording line info (as opposed to building partial
21642 symtabs and just interested in finding include files mentioned by
21643 the line number program). */
21644 bool record_lines_p
= !decode_for_pst_p
;
21646 baseaddr
= objfile
->text_section_offset ();
21648 line_ptr
= lh
->statement_program_start
;
21649 line_end
= lh
->statement_program_end
;
21651 /* Read the statement sequences until there's nothing left. */
21652 while (line_ptr
< line_end
)
21654 /* The DWARF line number program state machine. Reset the state
21655 machine at the start of each sequence. */
21656 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21657 bool end_sequence
= false;
21659 if (record_lines_p
)
21661 /* Start a subfile for the current file of the state
21663 const file_entry
*fe
= state_machine
.current_file ();
21666 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21669 /* Decode the table. */
21670 while (line_ptr
< line_end
&& !end_sequence
)
21672 op_code
= read_1_byte (abfd
, line_ptr
);
21675 if (op_code
>= lh
->opcode_base
)
21677 /* Special opcode. */
21678 state_machine
.handle_special_opcode (op_code
);
21680 else switch (op_code
)
21682 case DW_LNS_extended_op
:
21683 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21685 line_ptr
+= bytes_read
;
21686 extended_end
= line_ptr
+ extended_len
;
21687 extended_op
= read_1_byte (abfd
, line_ptr
);
21689 if (DW_LNE_lo_user
<= extended_op
21690 && extended_op
<= DW_LNE_hi_user
)
21692 /* Vendor extension, ignore. */
21693 line_ptr
= extended_end
;
21696 switch (extended_op
)
21698 case DW_LNE_end_sequence
:
21699 state_machine
.handle_end_sequence ();
21700 end_sequence
= true;
21702 case DW_LNE_set_address
:
21705 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
21706 line_ptr
+= bytes_read
;
21708 state_machine
.check_line_address (cu
, line_ptr
,
21709 lowpc
- baseaddr
, address
);
21710 state_machine
.handle_set_address (baseaddr
, address
);
21713 case DW_LNE_define_file
:
21715 const char *cur_file
;
21716 unsigned int mod_time
, length
;
21719 cur_file
= read_direct_string (abfd
, line_ptr
,
21721 line_ptr
+= bytes_read
;
21722 dindex
= (dir_index
)
21723 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21724 line_ptr
+= bytes_read
;
21726 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21727 line_ptr
+= bytes_read
;
21729 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21730 line_ptr
+= bytes_read
;
21731 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21734 case DW_LNE_set_discriminator
:
21736 /* The discriminator is not interesting to the
21737 debugger; just ignore it. We still need to
21738 check its value though:
21739 if there are consecutive entries for the same
21740 (non-prologue) line we want to coalesce them.
21743 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21744 line_ptr
+= bytes_read
;
21746 state_machine
.handle_set_discriminator (discr
);
21750 complaint (_("mangled .debug_line section"));
21753 /* Make sure that we parsed the extended op correctly. If e.g.
21754 we expected a different address size than the producer used,
21755 we may have read the wrong number of bytes. */
21756 if (line_ptr
!= extended_end
)
21758 complaint (_("mangled .debug_line section"));
21763 state_machine
.handle_copy ();
21765 case DW_LNS_advance_pc
:
21768 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21769 line_ptr
+= bytes_read
;
21771 state_machine
.handle_advance_pc (adjust
);
21774 case DW_LNS_advance_line
:
21777 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21778 line_ptr
+= bytes_read
;
21780 state_machine
.handle_advance_line (line_delta
);
21783 case DW_LNS_set_file
:
21785 file_name_index file
21786 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21788 line_ptr
+= bytes_read
;
21790 state_machine
.handle_set_file (file
);
21793 case DW_LNS_set_column
:
21794 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21795 line_ptr
+= bytes_read
;
21797 case DW_LNS_negate_stmt
:
21798 state_machine
.handle_negate_stmt ();
21800 case DW_LNS_set_basic_block
:
21802 /* Add to the address register of the state machine the
21803 address increment value corresponding to special opcode
21804 255. I.e., this value is scaled by the minimum
21805 instruction length since special opcode 255 would have
21806 scaled the increment. */
21807 case DW_LNS_const_add_pc
:
21808 state_machine
.handle_const_add_pc ();
21810 case DW_LNS_fixed_advance_pc
:
21812 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21815 state_machine
.handle_fixed_advance_pc (addr_adj
);
21820 /* Unknown standard opcode, ignore it. */
21823 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21825 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21826 line_ptr
+= bytes_read
;
21833 dwarf2_debug_line_missing_end_sequence_complaint ();
21835 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21836 in which case we still finish recording the last line). */
21837 state_machine
.record_line (true);
21841 /* Decode the Line Number Program (LNP) for the given line_header
21842 structure and CU. The actual information extracted and the type
21843 of structures created from the LNP depends on the value of PST.
21845 1. If PST is NULL, then this procedure uses the data from the program
21846 to create all necessary symbol tables, and their linetables.
21848 2. If PST is not NULL, this procedure reads the program to determine
21849 the list of files included by the unit represented by PST, and
21850 builds all the associated partial symbol tables.
21852 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21853 It is used for relative paths in the line table.
21854 NOTE: When processing partial symtabs (pst != NULL),
21855 comp_dir == pst->dirname.
21857 NOTE: It is important that psymtabs have the same file name (via strcmp)
21858 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21859 symtab we don't use it in the name of the psymtabs we create.
21860 E.g. expand_line_sal requires this when finding psymtabs to expand.
21861 A good testcase for this is mb-inline.exp.
21863 LOWPC is the lowest address in CU (or 0 if not known).
21865 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21866 for its PC<->lines mapping information. Otherwise only the filename
21867 table is read in. */
21870 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21871 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
21872 CORE_ADDR lowpc
, int decode_mapping
)
21874 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21875 const int decode_for_pst_p
= (pst
!= NULL
);
21877 if (decode_mapping
)
21878 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21880 if (decode_for_pst_p
)
21882 /* Now that we're done scanning the Line Header Program, we can
21883 create the psymtab of each included file. */
21884 for (auto &file_entry
: lh
->file_names ())
21885 if (file_entry
.included_p
== 1)
21887 gdb::unique_xmalloc_ptr
<char> name_holder
;
21888 const char *include_name
=
21889 psymtab_include_file_name (lh
, file_entry
, pst
,
21890 comp_dir
, &name_holder
);
21891 if (include_name
!= NULL
)
21892 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21897 /* Make sure a symtab is created for every file, even files
21898 which contain only variables (i.e. no code with associated
21900 buildsym_compunit
*builder
= cu
->get_builder ();
21901 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21903 for (auto &fe
: lh
->file_names ())
21905 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21906 if (builder
->get_current_subfile ()->symtab
== NULL
)
21908 builder
->get_current_subfile ()->symtab
21909 = allocate_symtab (cust
,
21910 builder
->get_current_subfile ()->name
);
21912 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21917 /* Start a subfile for DWARF. FILENAME is the name of the file and
21918 DIRNAME the name of the source directory which contains FILENAME
21919 or NULL if not known.
21920 This routine tries to keep line numbers from identical absolute and
21921 relative file names in a common subfile.
21923 Using the `list' example from the GDB testsuite, which resides in
21924 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21925 of /srcdir/list0.c yields the following debugging information for list0.c:
21927 DW_AT_name: /srcdir/list0.c
21928 DW_AT_comp_dir: /compdir
21929 files.files[0].name: list0.h
21930 files.files[0].dir: /srcdir
21931 files.files[1].name: list0.c
21932 files.files[1].dir: /srcdir
21934 The line number information for list0.c has to end up in a single
21935 subfile, so that `break /srcdir/list0.c:1' works as expected.
21936 start_subfile will ensure that this happens provided that we pass the
21937 concatenation of files.files[1].dir and files.files[1].name as the
21941 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21942 const char *dirname
)
21944 gdb::unique_xmalloc_ptr
<char> copy
;
21946 /* In order not to lose the line information directory,
21947 we concatenate it to the filename when it makes sense.
21948 Note that the Dwarf3 standard says (speaking of filenames in line
21949 information): ``The directory index is ignored for file names
21950 that represent full path names''. Thus ignoring dirname in the
21951 `else' branch below isn't an issue. */
21953 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21955 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
21956 filename
= copy
.get ();
21959 cu
->get_builder ()->start_subfile (filename
);
21962 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21963 buildsym_compunit constructor. */
21965 struct compunit_symtab
*
21966 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21969 gdb_assert (m_builder
== nullptr);
21971 m_builder
.reset (new struct buildsym_compunit
21972 (this->per_objfile
->objfile
,
21973 name
, comp_dir
, language
, low_pc
));
21975 list_in_scope
= get_builder ()->get_file_symbols ();
21977 get_builder ()->record_debugformat ("DWARF 2");
21978 get_builder ()->record_producer (producer
);
21980 processing_has_namespace_info
= false;
21982 return get_builder ()->get_compunit_symtab ();
21986 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21987 struct dwarf2_cu
*cu
)
21989 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21990 struct comp_unit_head
*cu_header
= &cu
->header
;
21992 /* NOTE drow/2003-01-30: There used to be a comment and some special
21993 code here to turn a symbol with DW_AT_external and a
21994 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21995 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21996 with some versions of binutils) where shared libraries could have
21997 relocations against symbols in their debug information - the
21998 minimal symbol would have the right address, but the debug info
21999 would not. It's no longer necessary, because we will explicitly
22000 apply relocations when we read in the debug information now. */
22002 /* A DW_AT_location attribute with no contents indicates that a
22003 variable has been optimized away. */
22004 if (attr
->form_is_block () && attr
->as_block ()->size
== 0)
22006 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
22010 /* Handle one degenerate form of location expression specially, to
22011 preserve GDB's previous behavior when section offsets are
22012 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
22013 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
22015 if (attr
->form_is_block ())
22017 struct dwarf_block
*block
= attr
->as_block ();
22019 if ((block
->data
[0] == DW_OP_addr
22020 && block
->size
== 1 + cu_header
->addr_size
)
22021 || ((block
->data
[0] == DW_OP_GNU_addr_index
22022 || block
->data
[0] == DW_OP_addrx
)
22024 == 1 + leb128_size (&block
->data
[1]))))
22026 unsigned int dummy
;
22028 if (block
->data
[0] == DW_OP_addr
)
22029 SET_SYMBOL_VALUE_ADDRESS
22030 (sym
, cu
->header
.read_address (objfile
->obfd
,
22034 SET_SYMBOL_VALUE_ADDRESS
22035 (sym
, read_addr_index_from_leb128 (cu
, block
->data
+ 1,
22037 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
22038 fixup_symbol_section (sym
, objfile
);
22039 SET_SYMBOL_VALUE_ADDRESS
22041 SYMBOL_VALUE_ADDRESS (sym
)
22042 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
22047 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
22048 expression evaluator, and use LOC_COMPUTED only when necessary
22049 (i.e. when the value of a register or memory location is
22050 referenced, or a thread-local block, etc.). Then again, it might
22051 not be worthwhile. I'm assuming that it isn't unless performance
22052 or memory numbers show me otherwise. */
22054 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
22056 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
22057 cu
->has_loclist
= true;
22060 /* Given a pointer to a DWARF information entry, figure out if we need
22061 to make a symbol table entry for it, and if so, create a new entry
22062 and return a pointer to it.
22063 If TYPE is NULL, determine symbol type from the die, otherwise
22064 used the passed type.
22065 If SPACE is not NULL, use it to hold the new symbol. If it is
22066 NULL, allocate a new symbol on the objfile's obstack. */
22068 static struct symbol
*
22069 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
22070 struct symbol
*space
)
22072 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22073 struct objfile
*objfile
= per_objfile
->objfile
;
22074 struct gdbarch
*gdbarch
= objfile
->arch ();
22075 struct symbol
*sym
= NULL
;
22077 struct attribute
*attr
= NULL
;
22078 struct attribute
*attr2
= NULL
;
22079 CORE_ADDR baseaddr
;
22080 struct pending
**list_to_add
= NULL
;
22082 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
22084 baseaddr
= objfile
->text_section_offset ();
22086 name
= dwarf2_name (die
, cu
);
22089 int suppress_add
= 0;
22094 sym
= new (&objfile
->objfile_obstack
) symbol
;
22095 OBJSTAT (objfile
, n_syms
++);
22097 /* Cache this symbol's name and the name's demangled form (if any). */
22098 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
22099 /* Fortran does not have mangling standard and the mangling does differ
22100 between gfortran, iFort etc. */
22101 const char *physname
22102 = (cu
->language
== language_fortran
22103 ? dwarf2_full_name (name
, die
, cu
)
22104 : dwarf2_physname (name
, die
, cu
));
22105 const char *linkagename
= dw2_linkage_name (die
, cu
);
22107 if (linkagename
== nullptr || cu
->language
== language_ada
)
22108 sym
->set_linkage_name (physname
);
22111 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
22112 sym
->set_linkage_name (linkagename
);
22115 /* Default assumptions.
22116 Use the passed type or decode it from the die. */
22117 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
22118 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
22120 SYMBOL_TYPE (sym
) = type
;
22122 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
22123 attr
= dwarf2_attr (die
,
22124 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
22126 if (attr
!= nullptr)
22127 SYMBOL_LINE (sym
) = attr
->constant_value (0);
22129 attr
= dwarf2_attr (die
,
22130 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
22132 if (attr
!= nullptr && attr
->form_is_unsigned ())
22134 file_name_index file_index
22135 = (file_name_index
) attr
->as_unsigned ();
22136 struct file_entry
*fe
;
22138 if (cu
->line_header
!= NULL
)
22139 fe
= cu
->line_header
->file_name_at (file_index
);
22144 complaint (_("file index out of range"));
22146 symbol_set_symtab (sym
, fe
->symtab
);
22152 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
22153 if (attr
!= nullptr)
22157 addr
= attr
->as_address ();
22158 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
22159 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
22160 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
22163 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
22164 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
22165 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
22166 add_symbol_to_list (sym
, cu
->list_in_scope
);
22168 case DW_TAG_subprogram
:
22169 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
22171 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
22172 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22173 if ((attr2
!= nullptr && attr2
->as_boolean ())
22174 || cu
->language
== language_ada
22175 || cu
->language
== language_fortran
)
22177 /* Subprograms marked external are stored as a global symbol.
22178 Ada and Fortran subprograms, whether marked external or
22179 not, are always stored as a global symbol, because we want
22180 to be able to access them globally. For instance, we want
22181 to be able to break on a nested subprogram without having
22182 to specify the context. */
22183 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22187 list_to_add
= cu
->list_in_scope
;
22190 case DW_TAG_inlined_subroutine
:
22191 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
22193 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
22194 SYMBOL_INLINED (sym
) = 1;
22195 list_to_add
= cu
->list_in_scope
;
22197 case DW_TAG_template_value_param
:
22199 /* Fall through. */
22200 case DW_TAG_constant
:
22201 case DW_TAG_variable
:
22202 case DW_TAG_member
:
22203 /* Compilation with minimal debug info may result in
22204 variables with missing type entries. Change the
22205 misleading `void' type to something sensible. */
22206 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
22207 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
22209 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22210 /* In the case of DW_TAG_member, we should only be called for
22211 static const members. */
22212 if (die
->tag
== DW_TAG_member
)
22214 /* dwarf2_add_field uses die_is_declaration,
22215 so we do the same. */
22216 gdb_assert (die_is_declaration (die
, cu
));
22219 if (attr
!= nullptr)
22221 dwarf2_const_value (attr
, sym
, cu
);
22222 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22225 if (attr2
!= nullptr && attr2
->as_boolean ())
22226 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22228 list_to_add
= cu
->list_in_scope
;
22232 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22233 if (attr
!= nullptr)
22235 var_decode_location (attr
, sym
, cu
);
22236 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22238 /* Fortran explicitly imports any global symbols to the local
22239 scope by DW_TAG_common_block. */
22240 if (cu
->language
== language_fortran
&& die
->parent
22241 && die
->parent
->tag
== DW_TAG_common_block
)
22244 if (SYMBOL_CLASS (sym
) == LOC_STATIC
22245 && SYMBOL_VALUE_ADDRESS (sym
) == 0
22246 && !per_objfile
->per_bfd
->has_section_at_zero
)
22248 /* When a static variable is eliminated by the linker,
22249 the corresponding debug information is not stripped
22250 out, but the variable address is set to null;
22251 do not add such variables into symbol table. */
22253 else if (attr2
!= nullptr && attr2
->as_boolean ())
22255 if (SYMBOL_CLASS (sym
) == LOC_STATIC
22256 && (objfile
->flags
& OBJF_MAINLINE
) == 0
22257 && per_objfile
->per_bfd
->can_copy
)
22259 /* A global static variable might be subject to
22260 copy relocation. We first check for a local
22261 minsym, though, because maybe the symbol was
22262 marked hidden, in which case this would not
22264 bound_minimal_symbol found
22265 = (lookup_minimal_symbol_linkage
22266 (sym
->linkage_name (), objfile
));
22267 if (found
.minsym
!= nullptr)
22268 sym
->maybe_copied
= 1;
22271 /* A variable with DW_AT_external is never static,
22272 but it may be block-scoped. */
22274 = ((cu
->list_in_scope
22275 == cu
->get_builder ()->get_file_symbols ())
22276 ? cu
->get_builder ()->get_global_symbols ()
22277 : cu
->list_in_scope
);
22280 list_to_add
= cu
->list_in_scope
;
22284 /* We do not know the address of this symbol.
22285 If it is an external symbol and we have type information
22286 for it, enter the symbol as a LOC_UNRESOLVED symbol.
22287 The address of the variable will then be determined from
22288 the minimal symbol table whenever the variable is
22290 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22292 /* Fortran explicitly imports any global symbols to the local
22293 scope by DW_TAG_common_block. */
22294 if (cu
->language
== language_fortran
&& die
->parent
22295 && die
->parent
->tag
== DW_TAG_common_block
)
22297 /* SYMBOL_CLASS doesn't matter here because
22298 read_common_block is going to reset it. */
22300 list_to_add
= cu
->list_in_scope
;
22302 else if (attr2
!= nullptr && attr2
->as_boolean ()
22303 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
22305 /* A variable with DW_AT_external is never static, but it
22306 may be block-scoped. */
22308 = ((cu
->list_in_scope
22309 == cu
->get_builder ()->get_file_symbols ())
22310 ? cu
->get_builder ()->get_global_symbols ()
22311 : cu
->list_in_scope
);
22313 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
22315 else if (!die_is_declaration (die
, cu
))
22317 /* Use the default LOC_OPTIMIZED_OUT class. */
22318 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
22320 list_to_add
= cu
->list_in_scope
;
22324 case DW_TAG_formal_parameter
:
22326 /* If we are inside a function, mark this as an argument. If
22327 not, we might be looking at an argument to an inlined function
22328 when we do not have enough information to show inlined frames;
22329 pretend it's a local variable in that case so that the user can
22331 struct context_stack
*curr
22332 = cu
->get_builder ()->get_current_context_stack ();
22333 if (curr
!= nullptr && curr
->name
!= nullptr)
22334 SYMBOL_IS_ARGUMENT (sym
) = 1;
22335 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22336 if (attr
!= nullptr)
22338 var_decode_location (attr
, sym
, cu
);
22340 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22341 if (attr
!= nullptr)
22343 dwarf2_const_value (attr
, sym
, cu
);
22346 list_to_add
= cu
->list_in_scope
;
22349 case DW_TAG_unspecified_parameters
:
22350 /* From varargs functions; gdb doesn't seem to have any
22351 interest in this information, so just ignore it for now.
22354 case DW_TAG_template_type_param
:
22356 /* Fall through. */
22357 case DW_TAG_class_type
:
22358 case DW_TAG_interface_type
:
22359 case DW_TAG_structure_type
:
22360 case DW_TAG_union_type
:
22361 case DW_TAG_set_type
:
22362 case DW_TAG_enumeration_type
:
22363 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22364 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
22367 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
22368 really ever be static objects: otherwise, if you try
22369 to, say, break of a class's method and you're in a file
22370 which doesn't mention that class, it won't work unless
22371 the check for all static symbols in lookup_symbol_aux
22372 saves you. See the OtherFileClass tests in
22373 gdb.c++/namespace.exp. */
22377 buildsym_compunit
*builder
= cu
->get_builder ();
22379 = (cu
->list_in_scope
== builder
->get_file_symbols ()
22380 && cu
->language
== language_cplus
22381 ? builder
->get_global_symbols ()
22382 : cu
->list_in_scope
);
22384 /* The semantics of C++ state that "struct foo {
22385 ... }" also defines a typedef for "foo". */
22386 if (cu
->language
== language_cplus
22387 || cu
->language
== language_ada
22388 || cu
->language
== language_d
22389 || cu
->language
== language_rust
)
22391 /* The symbol's name is already allocated along
22392 with this objfile, so we don't need to
22393 duplicate it for the type. */
22394 if (SYMBOL_TYPE (sym
)->name () == 0)
22395 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
22400 case DW_TAG_typedef
:
22401 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22402 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
22403 list_to_add
= cu
->list_in_scope
;
22405 case DW_TAG_array_type
:
22406 case DW_TAG_base_type
:
22407 case DW_TAG_subrange_type
:
22408 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22409 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
22410 list_to_add
= cu
->list_in_scope
;
22412 case DW_TAG_enumerator
:
22413 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22414 if (attr
!= nullptr)
22416 dwarf2_const_value (attr
, sym
, cu
);
22419 /* NOTE: carlton/2003-11-10: See comment above in the
22420 DW_TAG_class_type, etc. block. */
22423 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
22424 && cu
->language
== language_cplus
22425 ? cu
->get_builder ()->get_global_symbols ()
22426 : cu
->list_in_scope
);
22429 case DW_TAG_imported_declaration
:
22430 case DW_TAG_namespace
:
22431 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22432 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22434 case DW_TAG_module
:
22435 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22436 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
22437 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22439 case DW_TAG_common_block
:
22440 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
22441 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
22442 add_symbol_to_list (sym
, cu
->list_in_scope
);
22445 /* Not a tag we recognize. Hopefully we aren't processing
22446 trash data, but since we must specifically ignore things
22447 we don't recognize, there is nothing else we should do at
22449 complaint (_("unsupported tag: '%s'"),
22450 dwarf_tag_name (die
->tag
));
22456 sym
->hash_next
= objfile
->template_symbols
;
22457 objfile
->template_symbols
= sym
;
22458 list_to_add
= NULL
;
22461 if (list_to_add
!= NULL
)
22462 add_symbol_to_list (sym
, list_to_add
);
22464 /* For the benefit of old versions of GCC, check for anonymous
22465 namespaces based on the demangled name. */
22466 if (!cu
->processing_has_namespace_info
22467 && cu
->language
== language_cplus
)
22468 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
22473 /* Given an attr with a DW_FORM_dataN value in host byte order,
22474 zero-extend it as appropriate for the symbol's type. The DWARF
22475 standard (v4) is not entirely clear about the meaning of using
22476 DW_FORM_dataN for a constant with a signed type, where the type is
22477 wider than the data. The conclusion of a discussion on the DWARF
22478 list was that this is unspecified. We choose to always zero-extend
22479 because that is the interpretation long in use by GCC. */
22482 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
22483 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
22485 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22486 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
22487 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
22488 LONGEST l
= attr
->constant_value (0);
22490 if (bits
< sizeof (*value
) * 8)
22492 l
&= ((LONGEST
) 1 << bits
) - 1;
22495 else if (bits
== sizeof (*value
) * 8)
22499 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
22500 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
22507 /* Read a constant value from an attribute. Either set *VALUE, or if
22508 the value does not fit in *VALUE, set *BYTES - either already
22509 allocated on the objfile obstack, or newly allocated on OBSTACK,
22510 or, set *BATON, if we translated the constant to a location
22514 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
22515 const char *name
, struct obstack
*obstack
,
22516 struct dwarf2_cu
*cu
,
22517 LONGEST
*value
, const gdb_byte
**bytes
,
22518 struct dwarf2_locexpr_baton
**baton
)
22520 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22521 struct objfile
*objfile
= per_objfile
->objfile
;
22522 struct comp_unit_head
*cu_header
= &cu
->header
;
22523 struct dwarf_block
*blk
;
22524 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
22525 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22531 switch (attr
->form
)
22534 case DW_FORM_addrx
:
22535 case DW_FORM_GNU_addr_index
:
22539 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
22540 dwarf2_const_value_length_mismatch_complaint (name
,
22541 cu_header
->addr_size
,
22542 TYPE_LENGTH (type
));
22543 /* Symbols of this form are reasonably rare, so we just
22544 piggyback on the existing location code rather than writing
22545 a new implementation of symbol_computed_ops. */
22546 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
22547 (*baton
)->per_objfile
= per_objfile
;
22548 (*baton
)->per_cu
= cu
->per_cu
;
22549 gdb_assert ((*baton
)->per_cu
);
22551 (*baton
)->size
= 2 + cu_header
->addr_size
;
22552 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
22553 (*baton
)->data
= data
;
22555 data
[0] = DW_OP_addr
;
22556 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
22557 byte_order
, attr
->as_address ());
22558 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
22561 case DW_FORM_string
:
22564 case DW_FORM_GNU_str_index
:
22565 case DW_FORM_GNU_strp_alt
:
22566 /* The string is already allocated on the objfile obstack, point
22568 *bytes
= (const gdb_byte
*) attr
->as_string ();
22570 case DW_FORM_block1
:
22571 case DW_FORM_block2
:
22572 case DW_FORM_block4
:
22573 case DW_FORM_block
:
22574 case DW_FORM_exprloc
:
22575 case DW_FORM_data16
:
22576 blk
= attr
->as_block ();
22577 if (TYPE_LENGTH (type
) != blk
->size
)
22578 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
22579 TYPE_LENGTH (type
));
22580 *bytes
= blk
->data
;
22583 /* The DW_AT_const_value attributes are supposed to carry the
22584 symbol's value "represented as it would be on the target
22585 architecture." By the time we get here, it's already been
22586 converted to host endianness, so we just need to sign- or
22587 zero-extend it as appropriate. */
22588 case DW_FORM_data1
:
22589 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
22591 case DW_FORM_data2
:
22592 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
22594 case DW_FORM_data4
:
22595 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
22597 case DW_FORM_data8
:
22598 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
22601 case DW_FORM_sdata
:
22602 case DW_FORM_implicit_const
:
22603 *value
= attr
->as_signed ();
22606 case DW_FORM_udata
:
22607 *value
= attr
->as_unsigned ();
22611 complaint (_("unsupported const value attribute form: '%s'"),
22612 dwarf_form_name (attr
->form
));
22619 /* Copy constant value from an attribute to a symbol. */
22622 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
22623 struct dwarf2_cu
*cu
)
22625 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22627 const gdb_byte
*bytes
;
22628 struct dwarf2_locexpr_baton
*baton
;
22630 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
22631 sym
->print_name (),
22632 &objfile
->objfile_obstack
, cu
,
22633 &value
, &bytes
, &baton
);
22637 SYMBOL_LOCATION_BATON (sym
) = baton
;
22638 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
22640 else if (bytes
!= NULL
)
22642 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22643 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22647 SYMBOL_VALUE (sym
) = value
;
22648 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22652 /* Return the type of the die in question using its DW_AT_type attribute. */
22654 static struct type
*
22655 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22657 struct attribute
*type_attr
;
22659 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22662 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22663 /* A missing DW_AT_type represents a void type. */
22664 return objfile_type (objfile
)->builtin_void
;
22667 return lookup_die_type (die
, type_attr
, cu
);
22670 /* True iff CU's producer generates GNAT Ada auxiliary information
22671 that allows to find parallel types through that information instead
22672 of having to do expensive parallel lookups by type name. */
22675 need_gnat_info (struct dwarf2_cu
*cu
)
22677 /* Assume that the Ada compiler was GNAT, which always produces
22678 the auxiliary information. */
22679 return (cu
->language
== language_ada
);
22682 /* Return the auxiliary type of the die in question using its
22683 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22684 attribute is not present. */
22686 static struct type
*
22687 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22689 struct attribute
*type_attr
;
22691 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22695 return lookup_die_type (die
, type_attr
, cu
);
22698 /* If DIE has a descriptive_type attribute, then set the TYPE's
22699 descriptive type accordingly. */
22702 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22703 struct dwarf2_cu
*cu
)
22705 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22707 if (descriptive_type
)
22709 ALLOCATE_GNAT_AUX_TYPE (type
);
22710 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22714 /* Return the containing type of the die in question using its
22715 DW_AT_containing_type attribute. */
22717 static struct type
*
22718 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22720 struct attribute
*type_attr
;
22721 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22723 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22725 error (_("Dwarf Error: Problem turning containing type into gdb type "
22726 "[in module %s]"), objfile_name (objfile
));
22728 return lookup_die_type (die
, type_attr
, cu
);
22731 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22733 static struct type
*
22734 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22736 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22737 struct objfile
*objfile
= per_objfile
->objfile
;
22740 std::string message
22741 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22742 objfile_name (objfile
),
22743 sect_offset_str (cu
->header
.sect_off
),
22744 sect_offset_str (die
->sect_off
));
22745 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
22747 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22750 /* Look up the type of DIE in CU using its type attribute ATTR.
22751 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22752 DW_AT_containing_type.
22753 If there is no type substitute an error marker. */
22755 static struct type
*
22756 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22757 struct dwarf2_cu
*cu
)
22759 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22760 struct objfile
*objfile
= per_objfile
->objfile
;
22761 struct type
*this_type
;
22763 gdb_assert (attr
->name
== DW_AT_type
22764 || attr
->name
== DW_AT_GNAT_descriptive_type
22765 || attr
->name
== DW_AT_containing_type
);
22767 /* First see if we have it cached. */
22769 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22771 struct dwarf2_per_cu_data
*per_cu
;
22772 sect_offset sect_off
= attr
->get_ref_die_offset ();
22774 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, per_objfile
);
22775 this_type
= get_die_type_at_offset (sect_off
, per_cu
, per_objfile
);
22777 else if (attr
->form_is_ref ())
22779 sect_offset sect_off
= attr
->get_ref_die_offset ();
22781 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, per_objfile
);
22783 else if (attr
->form
== DW_FORM_ref_sig8
)
22785 ULONGEST signature
= attr
->as_signature ();
22787 return get_signatured_type (die
, signature
, cu
);
22791 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22792 " at %s [in module %s]"),
22793 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22794 objfile_name (objfile
));
22795 return build_error_marker_type (cu
, die
);
22798 /* If not cached we need to read it in. */
22800 if (this_type
== NULL
)
22802 struct die_info
*type_die
= NULL
;
22803 struct dwarf2_cu
*type_cu
= cu
;
22805 if (attr
->form_is_ref ())
22806 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22807 if (type_die
== NULL
)
22808 return build_error_marker_type (cu
, die
);
22809 /* If we find the type now, it's probably because the type came
22810 from an inter-CU reference and the type's CU got expanded before
22812 this_type
= read_type_die (type_die
, type_cu
);
22815 /* If we still don't have a type use an error marker. */
22817 if (this_type
== NULL
)
22818 return build_error_marker_type (cu
, die
);
22823 /* Return the type in DIE, CU.
22824 Returns NULL for invalid types.
22826 This first does a lookup in die_type_hash,
22827 and only reads the die in if necessary.
22829 NOTE: This can be called when reading in partial or full symbols. */
22831 static struct type
*
22832 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22834 struct type
*this_type
;
22836 this_type
= get_die_type (die
, cu
);
22840 return read_type_die_1 (die
, cu
);
22843 /* Read the type in DIE, CU.
22844 Returns NULL for invalid types. */
22846 static struct type
*
22847 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22849 struct type
*this_type
= NULL
;
22853 case DW_TAG_class_type
:
22854 case DW_TAG_interface_type
:
22855 case DW_TAG_structure_type
:
22856 case DW_TAG_union_type
:
22857 this_type
= read_structure_type (die
, cu
);
22859 case DW_TAG_enumeration_type
:
22860 this_type
= read_enumeration_type (die
, cu
);
22862 case DW_TAG_subprogram
:
22863 case DW_TAG_subroutine_type
:
22864 case DW_TAG_inlined_subroutine
:
22865 this_type
= read_subroutine_type (die
, cu
);
22867 case DW_TAG_array_type
:
22868 this_type
= read_array_type (die
, cu
);
22870 case DW_TAG_set_type
:
22871 this_type
= read_set_type (die
, cu
);
22873 case DW_TAG_pointer_type
:
22874 this_type
= read_tag_pointer_type (die
, cu
);
22876 case DW_TAG_ptr_to_member_type
:
22877 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22879 case DW_TAG_reference_type
:
22880 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22882 case DW_TAG_rvalue_reference_type
:
22883 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22885 case DW_TAG_const_type
:
22886 this_type
= read_tag_const_type (die
, cu
);
22888 case DW_TAG_volatile_type
:
22889 this_type
= read_tag_volatile_type (die
, cu
);
22891 case DW_TAG_restrict_type
:
22892 this_type
= read_tag_restrict_type (die
, cu
);
22894 case DW_TAG_string_type
:
22895 this_type
= read_tag_string_type (die
, cu
);
22897 case DW_TAG_typedef
:
22898 this_type
= read_typedef (die
, cu
);
22900 case DW_TAG_subrange_type
:
22901 this_type
= read_subrange_type (die
, cu
);
22903 case DW_TAG_base_type
:
22904 this_type
= read_base_type (die
, cu
);
22906 case DW_TAG_unspecified_type
:
22907 this_type
= read_unspecified_type (die
, cu
);
22909 case DW_TAG_namespace
:
22910 this_type
= read_namespace_type (die
, cu
);
22912 case DW_TAG_module
:
22913 this_type
= read_module_type (die
, cu
);
22915 case DW_TAG_atomic_type
:
22916 this_type
= read_tag_atomic_type (die
, cu
);
22919 complaint (_("unexpected tag in read_type_die: '%s'"),
22920 dwarf_tag_name (die
->tag
));
22927 /* See if we can figure out if the class lives in a namespace. We do
22928 this by looking for a member function; its demangled name will
22929 contain namespace info, if there is any.
22930 Return the computed name or NULL.
22931 Space for the result is allocated on the objfile's obstack.
22932 This is the full-die version of guess_partial_die_structure_name.
22933 In this case we know DIE has no useful parent. */
22935 static const char *
22936 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22938 struct die_info
*spec_die
;
22939 struct dwarf2_cu
*spec_cu
;
22940 struct die_info
*child
;
22941 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22944 spec_die
= die_specification (die
, &spec_cu
);
22945 if (spec_die
!= NULL
)
22951 for (child
= die
->child
;
22953 child
= child
->sibling
)
22955 if (child
->tag
== DW_TAG_subprogram
)
22957 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22959 if (linkage_name
!= NULL
)
22961 gdb::unique_xmalloc_ptr
<char> actual_name
22962 (cu
->language_defn
->class_name_from_physname (linkage_name
));
22963 const char *name
= NULL
;
22965 if (actual_name
!= NULL
)
22967 const char *die_name
= dwarf2_name (die
, cu
);
22969 if (die_name
!= NULL
22970 && strcmp (die_name
, actual_name
.get ()) != 0)
22972 /* Strip off the class name from the full name.
22973 We want the prefix. */
22974 int die_name_len
= strlen (die_name
);
22975 int actual_name_len
= strlen (actual_name
.get ());
22976 const char *ptr
= actual_name
.get ();
22978 /* Test for '::' as a sanity check. */
22979 if (actual_name_len
> die_name_len
+ 2
22980 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
22981 name
= obstack_strndup (
22982 &objfile
->per_bfd
->storage_obstack
,
22983 ptr
, actual_name_len
- die_name_len
- 2);
22994 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22995 prefix part in such case. See
22996 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22998 static const char *
22999 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
23001 struct attribute
*attr
;
23004 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
23005 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
23008 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
23011 attr
= dw2_linkage_name_attr (die
, cu
);
23012 const char *attr_name
= attr
->as_string ();
23013 if (attr
== NULL
|| attr_name
== NULL
)
23016 /* dwarf2_name had to be already called. */
23017 gdb_assert (attr
->canonical_string_p ());
23019 /* Strip the base name, keep any leading namespaces/classes. */
23020 base
= strrchr (attr_name
, ':');
23021 if (base
== NULL
|| base
== attr_name
|| base
[-1] != ':')
23024 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
23025 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
23027 &base
[-1] - attr_name
);
23030 /* Return the name of the namespace/class that DIE is defined within,
23031 or "" if we can't tell. The caller should not xfree the result.
23033 For example, if we're within the method foo() in the following
23043 then determine_prefix on foo's die will return "N::C". */
23045 static const char *
23046 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
23048 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23049 struct die_info
*parent
, *spec_die
;
23050 struct dwarf2_cu
*spec_cu
;
23051 struct type
*parent_type
;
23052 const char *retval
;
23054 if (cu
->language
!= language_cplus
23055 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
23056 && cu
->language
!= language_rust
)
23059 retval
= anonymous_struct_prefix (die
, cu
);
23063 /* We have to be careful in the presence of DW_AT_specification.
23064 For example, with GCC 3.4, given the code
23068 // Definition of N::foo.
23072 then we'll have a tree of DIEs like this:
23074 1: DW_TAG_compile_unit
23075 2: DW_TAG_namespace // N
23076 3: DW_TAG_subprogram // declaration of N::foo
23077 4: DW_TAG_subprogram // definition of N::foo
23078 DW_AT_specification // refers to die #3
23080 Thus, when processing die #4, we have to pretend that we're in
23081 the context of its DW_AT_specification, namely the contex of die
23084 spec_die
= die_specification (die
, &spec_cu
);
23085 if (spec_die
== NULL
)
23086 parent
= die
->parent
;
23089 parent
= spec_die
->parent
;
23093 if (parent
== NULL
)
23095 else if (parent
->building_fullname
)
23098 const char *parent_name
;
23100 /* It has been seen on RealView 2.2 built binaries,
23101 DW_TAG_template_type_param types actually _defined_ as
23102 children of the parent class:
23105 template class <class Enum> Class{};
23106 Class<enum E> class_e;
23108 1: DW_TAG_class_type (Class)
23109 2: DW_TAG_enumeration_type (E)
23110 3: DW_TAG_enumerator (enum1:0)
23111 3: DW_TAG_enumerator (enum2:1)
23113 2: DW_TAG_template_type_param
23114 DW_AT_type DW_FORM_ref_udata (E)
23116 Besides being broken debug info, it can put GDB into an
23117 infinite loop. Consider:
23119 When we're building the full name for Class<E>, we'll start
23120 at Class, and go look over its template type parameters,
23121 finding E. We'll then try to build the full name of E, and
23122 reach here. We're now trying to build the full name of E,
23123 and look over the parent DIE for containing scope. In the
23124 broken case, if we followed the parent DIE of E, we'd again
23125 find Class, and once again go look at its template type
23126 arguments, etc., etc. Simply don't consider such parent die
23127 as source-level parent of this die (it can't be, the language
23128 doesn't allow it), and break the loop here. */
23129 name
= dwarf2_name (die
, cu
);
23130 parent_name
= dwarf2_name (parent
, cu
);
23131 complaint (_("template param type '%s' defined within parent '%s'"),
23132 name
? name
: "<unknown>",
23133 parent_name
? parent_name
: "<unknown>");
23137 switch (parent
->tag
)
23139 case DW_TAG_namespace
:
23140 parent_type
= read_type_die (parent
, cu
);
23141 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
23142 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
23143 Work around this problem here. */
23144 if (cu
->language
== language_cplus
23145 && strcmp (parent_type
->name (), "::") == 0)
23147 /* We give a name to even anonymous namespaces. */
23148 return parent_type
->name ();
23149 case DW_TAG_class_type
:
23150 case DW_TAG_interface_type
:
23151 case DW_TAG_structure_type
:
23152 case DW_TAG_union_type
:
23153 case DW_TAG_module
:
23154 parent_type
= read_type_die (parent
, cu
);
23155 if (parent_type
->name () != NULL
)
23156 return parent_type
->name ();
23158 /* An anonymous structure is only allowed non-static data
23159 members; no typedefs, no member functions, et cetera.
23160 So it does not need a prefix. */
23162 case DW_TAG_compile_unit
:
23163 case DW_TAG_partial_unit
:
23164 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
23165 if (cu
->language
== language_cplus
23166 && !per_objfile
->per_bfd
->types
.empty ()
23167 && die
->child
!= NULL
23168 && (die
->tag
== DW_TAG_class_type
23169 || die
->tag
== DW_TAG_structure_type
23170 || die
->tag
== DW_TAG_union_type
))
23172 const char *name
= guess_full_die_structure_name (die
, cu
);
23177 case DW_TAG_subprogram
:
23178 /* Nested subroutines in Fortran get a prefix with the name
23179 of the parent's subroutine. */
23180 if (cu
->language
== language_fortran
)
23182 if ((die
->tag
== DW_TAG_subprogram
)
23183 && (dwarf2_name (parent
, cu
) != NULL
))
23184 return dwarf2_name (parent
, cu
);
23186 return determine_prefix (parent
, cu
);
23187 case DW_TAG_enumeration_type
:
23188 parent_type
= read_type_die (parent
, cu
);
23189 if (TYPE_DECLARED_CLASS (parent_type
))
23191 if (parent_type
->name () != NULL
)
23192 return parent_type
->name ();
23195 /* Fall through. */
23197 return determine_prefix (parent
, cu
);
23201 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
23202 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
23203 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
23204 an obconcat, otherwise allocate storage for the result. The CU argument is
23205 used to determine the language and hence, the appropriate separator. */
23207 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
23210 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
23211 int physname
, struct dwarf2_cu
*cu
)
23213 const char *lead
= "";
23216 if (suffix
== NULL
|| suffix
[0] == '\0'
23217 || prefix
== NULL
|| prefix
[0] == '\0')
23219 else if (cu
->language
== language_d
)
23221 /* For D, the 'main' function could be defined in any module, but it
23222 should never be prefixed. */
23223 if (strcmp (suffix
, "D main") == 0)
23231 else if (cu
->language
== language_fortran
&& physname
)
23233 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
23234 DW_AT_MIPS_linkage_name is preferred and used instead. */
23242 if (prefix
== NULL
)
23244 if (suffix
== NULL
)
23251 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
23253 strcpy (retval
, lead
);
23254 strcat (retval
, prefix
);
23255 strcat (retval
, sep
);
23256 strcat (retval
, suffix
);
23261 /* We have an obstack. */
23262 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
23266 /* Get name of a die, return NULL if not found. */
23268 static const char *
23269 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
23270 struct objfile
*objfile
)
23272 if (name
&& cu
->language
== language_cplus
)
23274 gdb::unique_xmalloc_ptr
<char> canon_name
23275 = cp_canonicalize_string (name
);
23277 if (canon_name
!= nullptr)
23278 name
= objfile
->intern (canon_name
.get ());
23284 /* Get name of a die, return NULL if not found.
23285 Anonymous namespaces are converted to their magic string. */
23287 static const char *
23288 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
23290 struct attribute
*attr
;
23291 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
23293 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
23294 const char *attr_name
= attr
== nullptr ? nullptr : attr
->as_string ();
23295 if (attr_name
== nullptr
23296 && die
->tag
!= DW_TAG_namespace
23297 && die
->tag
!= DW_TAG_class_type
23298 && die
->tag
!= DW_TAG_interface_type
23299 && die
->tag
!= DW_TAG_structure_type
23300 && die
->tag
!= DW_TAG_union_type
)
23305 case DW_TAG_compile_unit
:
23306 case DW_TAG_partial_unit
:
23307 /* Compilation units have a DW_AT_name that is a filename, not
23308 a source language identifier. */
23309 case DW_TAG_enumeration_type
:
23310 case DW_TAG_enumerator
:
23311 /* These tags always have simple identifiers already; no need
23312 to canonicalize them. */
23315 case DW_TAG_namespace
:
23316 if (attr_name
!= nullptr)
23318 return CP_ANONYMOUS_NAMESPACE_STR
;
23320 case DW_TAG_class_type
:
23321 case DW_TAG_interface_type
:
23322 case DW_TAG_structure_type
:
23323 case DW_TAG_union_type
:
23324 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
23325 structures or unions. These were of the form "._%d" in GCC 4.1,
23326 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
23327 and GCC 4.4. We work around this problem by ignoring these. */
23328 if (attr_name
!= nullptr
23329 && (startswith (attr_name
, "._")
23330 || startswith (attr_name
, "<anonymous")))
23333 /* GCC might emit a nameless typedef that has a linkage name. See
23334 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
23335 if (!attr
|| attr_name
== NULL
)
23337 attr
= dw2_linkage_name_attr (die
, cu
);
23338 attr_name
= attr
== nullptr ? nullptr : attr
->as_string ();
23339 if (attr
== NULL
|| attr_name
== NULL
)
23342 /* Avoid demangling attr_name the second time on a second
23343 call for the same DIE. */
23344 if (!attr
->canonical_string_p ())
23346 gdb::unique_xmalloc_ptr
<char> demangled
23347 (gdb_demangle (attr_name
, DMGL_TYPES
));
23348 if (demangled
== nullptr)
23351 attr
->set_string_canonical (objfile
->intern (demangled
.get ()));
23352 attr_name
= attr
->as_string ();
23355 /* Strip any leading namespaces/classes, keep only the
23356 base name. DW_AT_name for named DIEs does not
23357 contain the prefixes. */
23358 const char *base
= strrchr (attr_name
, ':');
23359 if (base
&& base
> attr_name
&& base
[-1] == ':')
23370 if (!attr
->canonical_string_p ())
23371 attr
->set_string_canonical (dwarf2_canonicalize_name (attr_name
, cu
,
23373 return attr
->as_string ();
23376 /* Return the die that this die in an extension of, or NULL if there
23377 is none. *EXT_CU is the CU containing DIE on input, and the CU
23378 containing the return value on output. */
23380 static struct die_info
*
23381 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
23383 struct attribute
*attr
;
23385 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
23389 return follow_die_ref (die
, attr
, ext_cu
);
23393 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
23397 print_spaces (indent
, f
);
23398 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
23399 dwarf_tag_name (die
->tag
), die
->abbrev
,
23400 sect_offset_str (die
->sect_off
));
23402 if (die
->parent
!= NULL
)
23404 print_spaces (indent
, f
);
23405 fprintf_unfiltered (f
, " parent at offset: %s\n",
23406 sect_offset_str (die
->parent
->sect_off
));
23409 print_spaces (indent
, f
);
23410 fprintf_unfiltered (f
, " has children: %s\n",
23411 dwarf_bool_name (die
->child
!= NULL
));
23413 print_spaces (indent
, f
);
23414 fprintf_unfiltered (f
, " attributes:\n");
23416 for (i
= 0; i
< die
->num_attrs
; ++i
)
23418 print_spaces (indent
, f
);
23419 fprintf_unfiltered (f
, " %s (%s) ",
23420 dwarf_attr_name (die
->attrs
[i
].name
),
23421 dwarf_form_name (die
->attrs
[i
].form
));
23423 switch (die
->attrs
[i
].form
)
23426 case DW_FORM_addrx
:
23427 case DW_FORM_GNU_addr_index
:
23428 fprintf_unfiltered (f
, "address: ");
23429 fputs_filtered (hex_string (die
->attrs
[i
].as_address ()), f
);
23431 case DW_FORM_block2
:
23432 case DW_FORM_block4
:
23433 case DW_FORM_block
:
23434 case DW_FORM_block1
:
23435 fprintf_unfiltered (f
, "block: size %s",
23436 pulongest (die
->attrs
[i
].as_block ()->size
));
23438 case DW_FORM_exprloc
:
23439 fprintf_unfiltered (f
, "expression: size %s",
23440 pulongest (die
->attrs
[i
].as_block ()->size
));
23442 case DW_FORM_data16
:
23443 fprintf_unfiltered (f
, "constant of 16 bytes");
23445 case DW_FORM_ref_addr
:
23446 fprintf_unfiltered (f
, "ref address: ");
23447 fputs_filtered (hex_string (die
->attrs
[i
].as_unsigned ()), f
);
23449 case DW_FORM_GNU_ref_alt
:
23450 fprintf_unfiltered (f
, "alt ref address: ");
23451 fputs_filtered (hex_string (die
->attrs
[i
].as_unsigned ()), f
);
23457 case DW_FORM_ref_udata
:
23458 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
23459 (long) (die
->attrs
[i
].as_unsigned ()));
23461 case DW_FORM_data1
:
23462 case DW_FORM_data2
:
23463 case DW_FORM_data4
:
23464 case DW_FORM_data8
:
23465 case DW_FORM_udata
:
23466 fprintf_unfiltered (f
, "constant: %s",
23467 pulongest (die
->attrs
[i
].as_unsigned ()));
23469 case DW_FORM_sec_offset
:
23470 fprintf_unfiltered (f
, "section offset: %s",
23471 pulongest (die
->attrs
[i
].as_unsigned ()));
23473 case DW_FORM_ref_sig8
:
23474 fprintf_unfiltered (f
, "signature: %s",
23475 hex_string (die
->attrs
[i
].as_signature ()));
23477 case DW_FORM_string
:
23479 case DW_FORM_line_strp
:
23481 case DW_FORM_GNU_str_index
:
23482 case DW_FORM_GNU_strp_alt
:
23483 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
23484 die
->attrs
[i
].as_string ()
23485 ? die
->attrs
[i
].as_string () : "",
23486 die
->attrs
[i
].canonical_string_p () ? "is" : "not");
23489 if (die
->attrs
[i
].as_boolean ())
23490 fprintf_unfiltered (f
, "flag: TRUE");
23492 fprintf_unfiltered (f
, "flag: FALSE");
23494 case DW_FORM_flag_present
:
23495 fprintf_unfiltered (f
, "flag: TRUE");
23497 case DW_FORM_indirect
:
23498 /* The reader will have reduced the indirect form to
23499 the "base form" so this form should not occur. */
23500 fprintf_unfiltered (f
,
23501 "unexpected attribute form: DW_FORM_indirect");
23503 case DW_FORM_sdata
:
23504 case DW_FORM_implicit_const
:
23505 fprintf_unfiltered (f
, "constant: %s",
23506 plongest (die
->attrs
[i
].as_signed ()));
23509 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
23510 die
->attrs
[i
].form
);
23513 fprintf_unfiltered (f
, "\n");
23518 dump_die_for_error (struct die_info
*die
)
23520 dump_die_shallow (gdb_stderr
, 0, die
);
23524 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
23526 int indent
= level
* 4;
23528 gdb_assert (die
!= NULL
);
23530 if (level
>= max_level
)
23533 dump_die_shallow (f
, indent
, die
);
23535 if (die
->child
!= NULL
)
23537 print_spaces (indent
, f
);
23538 fprintf_unfiltered (f
, " Children:");
23539 if (level
+ 1 < max_level
)
23541 fprintf_unfiltered (f
, "\n");
23542 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
23546 fprintf_unfiltered (f
,
23547 " [not printed, max nesting level reached]\n");
23551 if (die
->sibling
!= NULL
&& level
> 0)
23553 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23557 /* This is called from the pdie macro in gdbinit.in.
23558 It's not static so gcc will keep a copy callable from gdb. */
23561 dump_die (struct die_info
*die
, int max_level
)
23563 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23567 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23571 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23572 to_underlying (die
->sect_off
),
23578 /* Follow reference or signature attribute ATTR of SRC_DIE.
23579 On entry *REF_CU is the CU of SRC_DIE.
23580 On exit *REF_CU is the CU of the result. */
23582 static struct die_info
*
23583 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23584 struct dwarf2_cu
**ref_cu
)
23586 struct die_info
*die
;
23588 if (attr
->form_is_ref ())
23589 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23590 else if (attr
->form
== DW_FORM_ref_sig8
)
23591 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23594 dump_die_for_error (src_die
);
23595 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23596 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
23602 /* Follow reference OFFSET.
23603 On entry *REF_CU is the CU of the source die referencing OFFSET.
23604 On exit *REF_CU is the CU of the result.
23605 Returns NULL if OFFSET is invalid. */
23607 static struct die_info
*
23608 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23609 struct dwarf2_cu
**ref_cu
)
23611 struct die_info temp_die
;
23612 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23613 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23615 gdb_assert (cu
->per_cu
!= NULL
);
23619 dwarf_read_debug_printf_v ("source CU offset: %s, target offset: %s, "
23620 "source CU contains target offset: %d",
23621 sect_offset_str (cu
->per_cu
->sect_off
),
23622 sect_offset_str (sect_off
),
23623 cu
->header
.offset_in_cu_p (sect_off
));
23625 if (cu
->per_cu
->is_debug_types
)
23627 /* .debug_types CUs cannot reference anything outside their CU.
23628 If they need to, they have to reference a signatured type via
23629 DW_FORM_ref_sig8. */
23630 if (!cu
->header
.offset_in_cu_p (sect_off
))
23633 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23634 || !cu
->header
.offset_in_cu_p (sect_off
))
23636 struct dwarf2_per_cu_data
*per_cu
;
23638 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23641 dwarf_read_debug_printf_v ("target CU offset: %s, "
23642 "target CU DIEs loaded: %d",
23643 sect_offset_str (per_cu
->sect_off
),
23644 per_objfile
->get_cu (per_cu
) != nullptr);
23646 /* If necessary, add it to the queue and load its DIEs. */
23647 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
23648 load_full_comp_unit (per_cu
, per_objfile
, per_objfile
->get_cu (per_cu
),
23649 false, cu
->language
);
23651 target_cu
= per_objfile
->get_cu (per_cu
);
23653 else if (cu
->dies
== NULL
)
23655 /* We're loading full DIEs during partial symbol reading. */
23656 gdb_assert (per_objfile
->per_bfd
->reading_partial_symbols
);
23657 load_full_comp_unit (cu
->per_cu
, per_objfile
, cu
, false,
23661 *ref_cu
= target_cu
;
23662 temp_die
.sect_off
= sect_off
;
23664 if (target_cu
!= cu
)
23665 target_cu
->ancestor
= cu
;
23667 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23669 to_underlying (sect_off
));
23672 /* Follow reference attribute ATTR of SRC_DIE.
23673 On entry *REF_CU is the CU of SRC_DIE.
23674 On exit *REF_CU is the CU of the result. */
23676 static struct die_info
*
23677 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23678 struct dwarf2_cu
**ref_cu
)
23680 sect_offset sect_off
= attr
->get_ref_die_offset ();
23681 struct dwarf2_cu
*cu
= *ref_cu
;
23682 struct die_info
*die
;
23684 die
= follow_die_offset (sect_off
,
23685 (attr
->form
== DW_FORM_GNU_ref_alt
23686 || cu
->per_cu
->is_dwz
),
23689 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23690 "at %s [in module %s]"),
23691 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23692 objfile_name (cu
->per_objfile
->objfile
));
23699 struct dwarf2_locexpr_baton
23700 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23701 dwarf2_per_cu_data
*per_cu
,
23702 dwarf2_per_objfile
*per_objfile
,
23703 gdb::function_view
<CORE_ADDR ()> get_frame_pc
,
23704 bool resolve_abstract_p
)
23706 struct die_info
*die
;
23707 struct attribute
*attr
;
23708 struct dwarf2_locexpr_baton retval
;
23709 struct objfile
*objfile
= per_objfile
->objfile
;
23711 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23713 cu
= load_cu (per_cu
, per_objfile
, false);
23717 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23718 Instead just throw an error, not much else we can do. */
23719 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23720 sect_offset_str (sect_off
), objfile_name (objfile
));
23723 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23725 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23726 sect_offset_str (sect_off
), objfile_name (objfile
));
23728 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23729 if (!attr
&& resolve_abstract_p
23730 && (per_objfile
->per_bfd
->abstract_to_concrete
.find (die
->sect_off
)
23731 != per_objfile
->per_bfd
->abstract_to_concrete
.end ()))
23733 CORE_ADDR pc
= get_frame_pc ();
23734 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
23735 struct gdbarch
*gdbarch
= objfile
->arch ();
23737 for (const auto &cand_off
23738 : per_objfile
->per_bfd
->abstract_to_concrete
[die
->sect_off
])
23740 struct dwarf2_cu
*cand_cu
= cu
;
23741 struct die_info
*cand
23742 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23745 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23748 CORE_ADDR pc_low
, pc_high
;
23749 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23750 if (pc_low
== ((CORE_ADDR
) -1))
23752 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
23753 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
23754 if (!(pc_low
<= pc
&& pc
< pc_high
))
23758 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23765 /* DWARF: "If there is no such attribute, then there is no effect.".
23766 DATA is ignored if SIZE is 0. */
23768 retval
.data
= NULL
;
23771 else if (attr
->form_is_section_offset ())
23773 struct dwarf2_loclist_baton loclist_baton
;
23774 CORE_ADDR pc
= get_frame_pc ();
23777 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23779 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23781 retval
.size
= size
;
23785 if (!attr
->form_is_block ())
23786 error (_("Dwarf Error: DIE at %s referenced in module %s "
23787 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23788 sect_offset_str (sect_off
), objfile_name (objfile
));
23790 struct dwarf_block
*block
= attr
->as_block ();
23791 retval
.data
= block
->data
;
23792 retval
.size
= block
->size
;
23794 retval
.per_objfile
= per_objfile
;
23795 retval
.per_cu
= cu
->per_cu
;
23797 per_objfile
->age_comp_units ();
23804 struct dwarf2_locexpr_baton
23805 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23806 dwarf2_per_cu_data
*per_cu
,
23807 dwarf2_per_objfile
*per_objfile
,
23808 gdb::function_view
<CORE_ADDR ()> get_frame_pc
)
23810 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23812 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, per_objfile
,
23816 /* Write a constant of a given type as target-ordered bytes into
23819 static const gdb_byte
*
23820 write_constant_as_bytes (struct obstack
*obstack
,
23821 enum bfd_endian byte_order
,
23828 *len
= TYPE_LENGTH (type
);
23829 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23830 store_unsigned_integer (result
, *len
, byte_order
, value
);
23838 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23839 dwarf2_per_cu_data
*per_cu
,
23840 dwarf2_per_objfile
*per_objfile
,
23844 struct die_info
*die
;
23845 struct attribute
*attr
;
23846 const gdb_byte
*result
= NULL
;
23849 enum bfd_endian byte_order
;
23850 struct objfile
*objfile
= per_objfile
->objfile
;
23852 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23854 cu
= load_cu (per_cu
, per_objfile
, false);
23858 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23859 Instead just throw an error, not much else we can do. */
23860 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23861 sect_offset_str (sect_off
), objfile_name (objfile
));
23864 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23866 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23867 sect_offset_str (sect_off
), objfile_name (objfile
));
23869 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23873 byte_order
= (bfd_big_endian (objfile
->obfd
)
23874 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23876 switch (attr
->form
)
23879 case DW_FORM_addrx
:
23880 case DW_FORM_GNU_addr_index
:
23884 *len
= cu
->header
.addr_size
;
23885 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23886 store_unsigned_integer (tem
, *len
, byte_order
, attr
->as_address ());
23890 case DW_FORM_string
:
23893 case DW_FORM_GNU_str_index
:
23894 case DW_FORM_GNU_strp_alt
:
23895 /* The string is already allocated on the objfile obstack, point
23898 const char *attr_name
= attr
->as_string ();
23899 result
= (const gdb_byte
*) attr_name
;
23900 *len
= strlen (attr_name
);
23903 case DW_FORM_block1
:
23904 case DW_FORM_block2
:
23905 case DW_FORM_block4
:
23906 case DW_FORM_block
:
23907 case DW_FORM_exprloc
:
23908 case DW_FORM_data16
:
23910 struct dwarf_block
*block
= attr
->as_block ();
23911 result
= block
->data
;
23912 *len
= block
->size
;
23916 /* The DW_AT_const_value attributes are supposed to carry the
23917 symbol's value "represented as it would be on the target
23918 architecture." By the time we get here, it's already been
23919 converted to host endianness, so we just need to sign- or
23920 zero-extend it as appropriate. */
23921 case DW_FORM_data1
:
23922 type
= die_type (die
, cu
);
23923 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23924 if (result
== NULL
)
23925 result
= write_constant_as_bytes (obstack
, byte_order
,
23928 case DW_FORM_data2
:
23929 type
= die_type (die
, cu
);
23930 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23931 if (result
== NULL
)
23932 result
= write_constant_as_bytes (obstack
, byte_order
,
23935 case DW_FORM_data4
:
23936 type
= die_type (die
, cu
);
23937 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23938 if (result
== NULL
)
23939 result
= write_constant_as_bytes (obstack
, byte_order
,
23942 case DW_FORM_data8
:
23943 type
= die_type (die
, cu
);
23944 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23945 if (result
== NULL
)
23946 result
= write_constant_as_bytes (obstack
, byte_order
,
23950 case DW_FORM_sdata
:
23951 case DW_FORM_implicit_const
:
23952 type
= die_type (die
, cu
);
23953 result
= write_constant_as_bytes (obstack
, byte_order
,
23954 type
, attr
->as_signed (), len
);
23957 case DW_FORM_udata
:
23958 type
= die_type (die
, cu
);
23959 result
= write_constant_as_bytes (obstack
, byte_order
,
23960 type
, attr
->as_unsigned (), len
);
23964 complaint (_("unsupported const value attribute form: '%s'"),
23965 dwarf_form_name (attr
->form
));
23975 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23976 dwarf2_per_cu_data
*per_cu
,
23977 dwarf2_per_objfile
*per_objfile
)
23979 struct die_info
*die
;
23981 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23983 cu
= load_cu (per_cu
, per_objfile
, false);
23988 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23992 return die_type (die
, cu
);
23998 dwarf2_get_die_type (cu_offset die_offset
,
23999 dwarf2_per_cu_data
*per_cu
,
24000 dwarf2_per_objfile
*per_objfile
)
24002 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
24003 return get_die_type_at_offset (die_offset_sect
, per_cu
, per_objfile
);
24006 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
24007 On entry *REF_CU is the CU of SRC_DIE.
24008 On exit *REF_CU is the CU of the result.
24009 Returns NULL if the referenced DIE isn't found. */
24011 static struct die_info
*
24012 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
24013 struct dwarf2_cu
**ref_cu
)
24015 struct die_info temp_die
;
24016 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
24017 struct die_info
*die
;
24018 dwarf2_per_objfile
*per_objfile
= (*ref_cu
)->per_objfile
;
24021 /* While it might be nice to assert sig_type->type == NULL here,
24022 we can get here for DW_AT_imported_declaration where we need
24023 the DIE not the type. */
24025 /* If necessary, add it to the queue and load its DIEs. */
24027 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, per_objfile
,
24029 read_signatured_type (sig_type
, per_objfile
);
24031 sig_cu
= per_objfile
->get_cu (&sig_type
->per_cu
);
24032 gdb_assert (sig_cu
!= NULL
);
24033 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
24034 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
24035 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
24036 to_underlying (temp_die
.sect_off
));
24039 /* For .gdb_index version 7 keep track of included TUs.
24040 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
24041 if (per_objfile
->per_bfd
->index_table
!= NULL
24042 && per_objfile
->per_bfd
->index_table
->version
<= 7)
24044 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
24049 sig_cu
->ancestor
= cu
;
24057 /* Follow signatured type referenced by ATTR in SRC_DIE.
24058 On entry *REF_CU is the CU of SRC_DIE.
24059 On exit *REF_CU is the CU of the result.
24060 The result is the DIE of the type.
24061 If the referenced type cannot be found an error is thrown. */
24063 static struct die_info
*
24064 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
24065 struct dwarf2_cu
**ref_cu
)
24067 ULONGEST signature
= attr
->as_signature ();
24068 struct signatured_type
*sig_type
;
24069 struct die_info
*die
;
24071 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
24073 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
24074 /* sig_type will be NULL if the signatured type is missing from
24076 if (sig_type
== NULL
)
24078 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
24079 " from DIE at %s [in module %s]"),
24080 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
24081 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
24084 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
24087 dump_die_for_error (src_die
);
24088 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
24089 " from DIE at %s [in module %s]"),
24090 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
24091 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
24097 /* Get the type specified by SIGNATURE referenced in DIE/CU,
24098 reading in and processing the type unit if necessary. */
24100 static struct type
*
24101 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
24102 struct dwarf2_cu
*cu
)
24104 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24105 struct signatured_type
*sig_type
;
24106 struct dwarf2_cu
*type_cu
;
24107 struct die_info
*type_die
;
24110 sig_type
= lookup_signatured_type (cu
, signature
);
24111 /* sig_type will be NULL if the signatured type is missing from
24113 if (sig_type
== NULL
)
24115 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
24116 " from DIE at %s [in module %s]"),
24117 hex_string (signature
), sect_offset_str (die
->sect_off
),
24118 objfile_name (per_objfile
->objfile
));
24119 return build_error_marker_type (cu
, die
);
24122 /* If we already know the type we're done. */
24123 type
= per_objfile
->get_type_for_signatured_type (sig_type
);
24124 if (type
!= nullptr)
24128 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
24129 if (type_die
!= NULL
)
24131 /* N.B. We need to call get_die_type to ensure only one type for this DIE
24132 is created. This is important, for example, because for c++ classes
24133 we need TYPE_NAME set which is only done by new_symbol. Blech. */
24134 type
= read_type_die (type_die
, type_cu
);
24137 complaint (_("Dwarf Error: Cannot build signatured type %s"
24138 " referenced from DIE at %s [in module %s]"),
24139 hex_string (signature
), sect_offset_str (die
->sect_off
),
24140 objfile_name (per_objfile
->objfile
));
24141 type
= build_error_marker_type (cu
, die
);
24146 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
24147 " from DIE at %s [in module %s]"),
24148 hex_string (signature
), sect_offset_str (die
->sect_off
),
24149 objfile_name (per_objfile
->objfile
));
24150 type
= build_error_marker_type (cu
, die
);
24153 per_objfile
->set_type_for_signatured_type (sig_type
, type
);
24158 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
24159 reading in and processing the type unit if necessary. */
24161 static struct type
*
24162 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
24163 struct dwarf2_cu
*cu
) /* ARI: editCase function */
24165 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
24166 if (attr
->form_is_ref ())
24168 struct dwarf2_cu
*type_cu
= cu
;
24169 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
24171 return read_type_die (type_die
, type_cu
);
24173 else if (attr
->form
== DW_FORM_ref_sig8
)
24175 return get_signatured_type (die
, attr
->as_signature (), cu
);
24179 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24181 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
24182 " at %s [in module %s]"),
24183 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
24184 objfile_name (per_objfile
->objfile
));
24185 return build_error_marker_type (cu
, die
);
24189 /* Load the DIEs associated with type unit PER_CU into memory. */
24192 load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
24193 dwarf2_per_objfile
*per_objfile
)
24195 struct signatured_type
*sig_type
;
24197 /* Caller is responsible for ensuring type_unit_groups don't get here. */
24198 gdb_assert (! per_cu
->type_unit_group_p ());
24200 /* We have the per_cu, but we need the signatured_type.
24201 Fortunately this is an easy translation. */
24202 gdb_assert (per_cu
->is_debug_types
);
24203 sig_type
= (struct signatured_type
*) per_cu
;
24205 gdb_assert (per_objfile
->get_cu (per_cu
) == nullptr);
24207 read_signatured_type (sig_type
, per_objfile
);
24209 gdb_assert (per_objfile
->get_cu (per_cu
) != nullptr);
24212 /* Read in a signatured type and build its CU and DIEs.
24213 If the type is a stub for the real type in a DWO file,
24214 read in the real type from the DWO file as well. */
24217 read_signatured_type (signatured_type
*sig_type
,
24218 dwarf2_per_objfile
*per_objfile
)
24220 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
24222 gdb_assert (per_cu
->is_debug_types
);
24223 gdb_assert (per_objfile
->get_cu (per_cu
) == nullptr);
24225 cutu_reader
reader (per_cu
, per_objfile
, nullptr, nullptr, false);
24227 if (!reader
.dummy_p
)
24229 struct dwarf2_cu
*cu
= reader
.cu
;
24230 const gdb_byte
*info_ptr
= reader
.info_ptr
;
24232 gdb_assert (cu
->die_hash
== NULL
);
24234 htab_create_alloc_ex (cu
->header
.length
/ 12,
24238 &cu
->comp_unit_obstack
,
24239 hashtab_obstack_allocate
,
24240 dummy_obstack_deallocate
);
24242 if (reader
.comp_unit_die
->has_children
)
24243 reader
.comp_unit_die
->child
24244 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
24245 reader
.comp_unit_die
);
24246 cu
->dies
= reader
.comp_unit_die
;
24247 /* comp_unit_die is not stored in die_hash, no need. */
24249 /* We try not to read any attributes in this function, because
24250 not all CUs needed for references have been loaded yet, and
24251 symbol table processing isn't initialized. But we have to
24252 set the CU language, or we won't be able to build types
24253 correctly. Similarly, if we do not read the producer, we can
24254 not apply producer-specific interpretation. */
24255 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
24260 sig_type
->per_cu
.tu_read
= 1;
24263 /* Decode simple location descriptions.
24264 Given a pointer to a dwarf block that defines a location, compute
24265 the location and return the value. If COMPUTED is non-null, it is
24266 set to true to indicate that decoding was successful, and false
24267 otherwise. If COMPUTED is null, then this function may emit a
24271 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
24273 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
24275 size_t size
= blk
->size
;
24276 const gdb_byte
*data
= blk
->data
;
24277 CORE_ADDR stack
[64];
24279 unsigned int bytes_read
, unsnd
;
24282 if (computed
!= nullptr)
24288 stack
[++stacki
] = 0;
24327 stack
[++stacki
] = op
- DW_OP_lit0
;
24362 stack
[++stacki
] = op
- DW_OP_reg0
;
24365 if (computed
== nullptr)
24366 dwarf2_complex_location_expr_complaint ();
24373 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
24375 stack
[++stacki
] = unsnd
;
24378 if (computed
== nullptr)
24379 dwarf2_complex_location_expr_complaint ();
24386 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
24391 case DW_OP_const1u
:
24392 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
24396 case DW_OP_const1s
:
24397 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
24401 case DW_OP_const2u
:
24402 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
24406 case DW_OP_const2s
:
24407 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
24411 case DW_OP_const4u
:
24412 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
24416 case DW_OP_const4s
:
24417 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
24421 case DW_OP_const8u
:
24422 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
24427 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
24433 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
24438 stack
[stacki
+ 1] = stack
[stacki
];
24443 stack
[stacki
- 1] += stack
[stacki
];
24447 case DW_OP_plus_uconst
:
24448 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
24454 stack
[stacki
- 1] -= stack
[stacki
];
24459 /* If we're not the last op, then we definitely can't encode
24460 this using GDB's address_class enum. This is valid for partial
24461 global symbols, although the variable's address will be bogus
24465 if (computed
== nullptr)
24466 dwarf2_complex_location_expr_complaint ();
24472 case DW_OP_GNU_push_tls_address
:
24473 case DW_OP_form_tls_address
:
24474 /* The top of the stack has the offset from the beginning
24475 of the thread control block at which the variable is located. */
24476 /* Nothing should follow this operator, so the top of stack would
24478 /* This is valid for partial global symbols, but the variable's
24479 address will be bogus in the psymtab. Make it always at least
24480 non-zero to not look as a variable garbage collected by linker
24481 which have DW_OP_addr 0. */
24484 if (computed
== nullptr)
24485 dwarf2_complex_location_expr_complaint ();
24492 case DW_OP_GNU_uninit
:
24493 if (computed
!= nullptr)
24498 case DW_OP_GNU_addr_index
:
24499 case DW_OP_GNU_const_index
:
24500 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
24506 if (computed
== nullptr)
24508 const char *name
= get_DW_OP_name (op
);
24511 complaint (_("unsupported stack op: '%s'"),
24514 complaint (_("unsupported stack op: '%02x'"),
24518 return (stack
[stacki
]);
24521 /* Enforce maximum stack depth of SIZE-1 to avoid writing
24522 outside of the allocated space. Also enforce minimum>0. */
24523 if (stacki
>= ARRAY_SIZE (stack
) - 1)
24525 if (computed
== nullptr)
24526 complaint (_("location description stack overflow"));
24532 if (computed
== nullptr)
24533 complaint (_("location description stack underflow"));
24538 if (computed
!= nullptr)
24540 return (stack
[stacki
]);
24543 /* memory allocation interface */
24545 static struct dwarf_block
*
24546 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24548 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24551 static struct die_info
*
24552 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24554 struct die_info
*die
;
24555 size_t size
= sizeof (struct die_info
);
24558 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24560 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24561 memset (die
, 0, sizeof (struct die_info
));
24567 /* Macro support. */
24569 /* An overload of dwarf_decode_macros that finds the correct section
24570 and ensures it is read in before calling the other overload. */
24573 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24574 int section_is_gnu
)
24576 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24577 struct objfile
*objfile
= per_objfile
->objfile
;
24578 const struct line_header
*lh
= cu
->line_header
;
24579 unsigned int offset_size
= cu
->header
.offset_size
;
24580 struct dwarf2_section_info
*section
;
24581 const char *section_name
;
24583 if (cu
->dwo_unit
!= nullptr)
24585 if (section_is_gnu
)
24587 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24588 section_name
= ".debug_macro.dwo";
24592 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24593 section_name
= ".debug_macinfo.dwo";
24598 if (section_is_gnu
)
24600 section
= &per_objfile
->per_bfd
->macro
;
24601 section_name
= ".debug_macro";
24605 section
= &per_objfile
->per_bfd
->macinfo
;
24606 section_name
= ".debug_macinfo";
24610 section
->read (objfile
);
24611 if (section
->buffer
== nullptr)
24613 complaint (_("missing %s section"), section_name
);
24617 buildsym_compunit
*builder
= cu
->get_builder ();
24619 struct dwarf2_section_info
*str_offsets_section
;
24620 struct dwarf2_section_info
*str_section
;
24621 ULONGEST str_offsets_base
;
24623 if (cu
->dwo_unit
!= nullptr)
24625 str_offsets_section
= &cu
->dwo_unit
->dwo_file
24626 ->sections
.str_offsets
;
24627 str_section
= &cu
->dwo_unit
->dwo_file
->sections
.str
;
24628 str_offsets_base
= cu
->header
.addr_size
;
24632 str_offsets_section
= &per_objfile
->per_bfd
->str_offsets
;
24633 str_section
= &per_objfile
->per_bfd
->str
;
24634 str_offsets_base
= *cu
->str_offsets_base
;
24637 dwarf_decode_macros (per_objfile
, builder
, section
, lh
,
24638 offset_size
, offset
, str_section
, str_offsets_section
,
24639 str_offsets_base
, section_is_gnu
);
24642 /* Return the .debug_loc section to use for CU.
24643 For DWO files use .debug_loc.dwo. */
24645 static struct dwarf2_section_info
*
24646 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24648 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24652 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24654 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24656 return (cu
->header
.version
>= 5 ? &per_objfile
->per_bfd
->loclists
24657 : &per_objfile
->per_bfd
->loc
);
24660 /* Return the .debug_rnglists section to use for CU. */
24661 static struct dwarf2_section_info
*
24662 cu_debug_rnglists_section (struct dwarf2_cu
*cu
, dwarf_tag tag
)
24664 if (cu
->header
.version
< 5)
24665 error (_(".debug_rnglists section cannot be used in DWARF %d"),
24666 cu
->header
.version
);
24667 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
24669 /* Make sure we read the .debug_rnglists section from the file that
24670 contains the DW_AT_ranges attribute we are reading. Normally that
24671 would be the .dwo file, if there is one. However for DW_TAG_compile_unit
24672 or DW_TAG_skeleton unit, we always want to read from objfile/linked
24674 if (cu
->dwo_unit
!= nullptr
24675 && tag
!= DW_TAG_compile_unit
24676 && tag
!= DW_TAG_skeleton_unit
)
24678 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24680 if (sections
->rnglists
.size
> 0)
24681 return §ions
->rnglists
;
24683 error (_(".debug_rnglists section is missing from .dwo file."));
24685 return &dwarf2_per_objfile
->per_bfd
->rnglists
;
24688 /* A helper function that fills in a dwarf2_loclist_baton. */
24691 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24692 struct dwarf2_loclist_baton
*baton
,
24693 const struct attribute
*attr
)
24695 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24696 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24698 section
->read (per_objfile
->objfile
);
24700 baton
->per_objfile
= per_objfile
;
24701 baton
->per_cu
= cu
->per_cu
;
24702 gdb_assert (baton
->per_cu
);
24703 /* We don't know how long the location list is, but make sure we
24704 don't run off the edge of the section. */
24705 baton
->size
= section
->size
- attr
->as_unsigned ();
24706 baton
->data
= section
->buffer
+ attr
->as_unsigned ();
24707 if (cu
->base_address
.has_value ())
24708 baton
->base_address
= *cu
->base_address
;
24710 baton
->base_address
= 0;
24711 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24715 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24716 struct dwarf2_cu
*cu
, int is_block
)
24718 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24719 struct objfile
*objfile
= per_objfile
->objfile
;
24720 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24722 if (attr
->form_is_section_offset ()
24723 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24724 the section. If so, fall through to the complaint in the
24726 && attr
->as_unsigned () < section
->get_size (objfile
))
24728 struct dwarf2_loclist_baton
*baton
;
24730 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24732 fill_in_loclist_baton (cu
, baton
, attr
);
24734 if (!cu
->base_address
.has_value ())
24735 complaint (_("Location list used without "
24736 "specifying the CU base address."));
24738 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24739 ? dwarf2_loclist_block_index
24740 : dwarf2_loclist_index
);
24741 SYMBOL_LOCATION_BATON (sym
) = baton
;
24745 struct dwarf2_locexpr_baton
*baton
;
24747 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24748 baton
->per_objfile
= per_objfile
;
24749 baton
->per_cu
= cu
->per_cu
;
24750 gdb_assert (baton
->per_cu
);
24752 if (attr
->form_is_block ())
24754 /* Note that we're just copying the block's data pointer
24755 here, not the actual data. We're still pointing into the
24756 info_buffer for SYM's objfile; right now we never release
24757 that buffer, but when we do clean up properly this may
24759 struct dwarf_block
*block
= attr
->as_block ();
24760 baton
->size
= block
->size
;
24761 baton
->data
= block
->data
;
24765 dwarf2_invalid_attrib_class_complaint ("location description",
24766 sym
->natural_name ());
24770 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24771 ? dwarf2_locexpr_block_index
24772 : dwarf2_locexpr_index
);
24773 SYMBOL_LOCATION_BATON (sym
) = baton
;
24779 const comp_unit_head
*
24780 dwarf2_per_cu_data::get_header () const
24782 if (!m_header_read_in
)
24784 const gdb_byte
*info_ptr
24785 = this->section
->buffer
+ to_underlying (this->sect_off
);
24787 memset (&m_header
, 0, sizeof (m_header
));
24789 read_comp_unit_head (&m_header
, info_ptr
, this->section
,
24790 rcuh_kind::COMPILE
);
24799 dwarf2_per_cu_data::addr_size () const
24801 return this->get_header ()->addr_size
;
24807 dwarf2_per_cu_data::offset_size () const
24809 return this->get_header ()->offset_size
;
24815 dwarf2_per_cu_data::ref_addr_size () const
24817 const comp_unit_head
*header
= this->get_header ();
24819 if (header
->version
== 2)
24820 return header
->addr_size
;
24822 return header
->offset_size
;
24828 dwarf2_cu::addr_type () const
24830 struct objfile
*objfile
= this->per_objfile
->objfile
;
24831 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
24832 struct type
*addr_type
= lookup_pointer_type (void_type
);
24833 int addr_size
= this->per_cu
->addr_size ();
24835 if (TYPE_LENGTH (addr_type
) == addr_size
)
24838 addr_type
= addr_sized_int_type (addr_type
->is_unsigned ());
24842 /* A helper function for dwarf2_find_containing_comp_unit that returns
24843 the index of the result, and that searches a vector. It will
24844 return a result even if the offset in question does not actually
24845 occur in any CU. This is separate so that it can be unit
24849 dwarf2_find_containing_comp_unit
24850 (sect_offset sect_off
,
24851 unsigned int offset_in_dwz
,
24852 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
24857 high
= all_comp_units
.size () - 1;
24860 struct dwarf2_per_cu_data
*mid_cu
;
24861 int mid
= low
+ (high
- low
) / 2;
24863 mid_cu
= all_comp_units
[mid
];
24864 if (mid_cu
->is_dwz
> offset_in_dwz
24865 || (mid_cu
->is_dwz
== offset_in_dwz
24866 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
24871 gdb_assert (low
== high
);
24875 /* Locate the .debug_info compilation unit from CU's objfile which contains
24876 the DIE at OFFSET. Raises an error on failure. */
24878 static struct dwarf2_per_cu_data
*
24879 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24880 unsigned int offset_in_dwz
,
24881 dwarf2_per_objfile
*per_objfile
)
24883 int low
= dwarf2_find_containing_comp_unit
24884 (sect_off
, offset_in_dwz
, per_objfile
->per_bfd
->all_comp_units
);
24885 dwarf2_per_cu_data
*this_cu
= per_objfile
->per_bfd
->all_comp_units
[low
];
24887 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
24889 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24890 error (_("Dwarf Error: could not find partial DIE containing "
24891 "offset %s [in module %s]"),
24892 sect_offset_str (sect_off
),
24893 bfd_get_filename (per_objfile
->objfile
->obfd
));
24895 gdb_assert (per_objfile
->per_bfd
->all_comp_units
[low
-1]->sect_off
24897 return per_objfile
->per_bfd
->all_comp_units
[low
-1];
24901 if (low
== per_objfile
->per_bfd
->all_comp_units
.size () - 1
24902 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24903 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24904 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24911 namespace selftests
{
24912 namespace find_containing_comp_unit
{
24917 struct dwarf2_per_cu_data one
{};
24918 struct dwarf2_per_cu_data two
{};
24919 struct dwarf2_per_cu_data three
{};
24920 struct dwarf2_per_cu_data four
{};
24923 two
.sect_off
= sect_offset (one
.length
);
24928 four
.sect_off
= sect_offset (three
.length
);
24932 std::vector
<dwarf2_per_cu_data
*> units
;
24933 units
.push_back (&one
);
24934 units
.push_back (&two
);
24935 units
.push_back (&three
);
24936 units
.push_back (&four
);
24940 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
24941 SELF_CHECK (units
[result
] == &one
);
24942 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
24943 SELF_CHECK (units
[result
] == &one
);
24944 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
24945 SELF_CHECK (units
[result
] == &two
);
24947 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
24948 SELF_CHECK (units
[result
] == &three
);
24949 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
24950 SELF_CHECK (units
[result
] == &three
);
24951 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
24952 SELF_CHECK (units
[result
] == &four
);
24958 #endif /* GDB_SELF_TEST */
24960 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE. */
24962 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
24963 dwarf2_per_objfile
*per_objfile
)
24965 per_objfile (per_objfile
),
24967 has_loclist (false),
24968 checked_producer (false),
24969 producer_is_gxx_lt_4_6 (false),
24970 producer_is_gcc_lt_4_3 (false),
24971 producer_is_icc (false),
24972 producer_is_icc_lt_14 (false),
24973 producer_is_codewarrior (false),
24974 processing_has_namespace_info (false)
24978 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24981 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24982 enum language pretend_language
)
24984 struct attribute
*attr
;
24986 /* Set the language we're debugging. */
24987 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24988 if (attr
!= nullptr)
24989 set_cu_language (attr
->constant_value (0), cu
);
24992 cu
->language
= pretend_language
;
24993 cu
->language_defn
= language_def (cu
->language
);
24996 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25002 dwarf2_per_objfile::get_cu (dwarf2_per_cu_data
*per_cu
)
25004 auto it
= m_dwarf2_cus
.find (per_cu
);
25005 if (it
== m_dwarf2_cus
.end ())
25014 dwarf2_per_objfile::set_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_cu
*cu
)
25016 gdb_assert (this->get_cu (per_cu
) == nullptr);
25018 m_dwarf2_cus
[per_cu
] = cu
;
25024 dwarf2_per_objfile::age_comp_units ()
25026 dwarf_read_debug_printf_v ("running");
25028 /* Start by clearing all marks. */
25029 for (auto pair
: m_dwarf2_cus
)
25030 pair
.second
->mark
= false;
25032 /* Traverse all CUs, mark them and their dependencies if used recently
25034 for (auto pair
: m_dwarf2_cus
)
25036 dwarf2_cu
*cu
= pair
.second
;
25039 if (cu
->last_used
<= dwarf_max_cache_age
)
25043 /* Delete all CUs still not marked. */
25044 for (auto it
= m_dwarf2_cus
.begin (); it
!= m_dwarf2_cus
.end ();)
25046 dwarf2_cu
*cu
= it
->second
;
25050 dwarf_read_debug_printf_v ("deleting old CU %s",
25051 sect_offset_str (cu
->per_cu
->sect_off
));
25053 it
= m_dwarf2_cus
.erase (it
);
25063 dwarf2_per_objfile::remove_cu (dwarf2_per_cu_data
*per_cu
)
25065 auto it
= m_dwarf2_cus
.find (per_cu
);
25066 if (it
== m_dwarf2_cus
.end ())
25071 m_dwarf2_cus
.erase (it
);
25074 dwarf2_per_objfile::~dwarf2_per_objfile ()
25079 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25080 We store these in a hash table separate from the DIEs, and preserve them
25081 when the DIEs are flushed out of cache.
25083 The CU "per_cu" pointer is needed because offset alone is not enough to
25084 uniquely identify the type. A file may have multiple .debug_types sections,
25085 or the type may come from a DWO file. Furthermore, while it's more logical
25086 to use per_cu->section+offset, with Fission the section with the data is in
25087 the DWO file but we don't know that section at the point we need it.
25088 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25089 because we can enter the lookup routine, get_die_type_at_offset, from
25090 outside this file, and thus won't necessarily have PER_CU->cu.
25091 Fortunately, PER_CU is stable for the life of the objfile. */
25093 struct dwarf2_per_cu_offset_and_type
25095 const struct dwarf2_per_cu_data
*per_cu
;
25096 sect_offset sect_off
;
25100 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25103 per_cu_offset_and_type_hash (const void *item
)
25105 const struct dwarf2_per_cu_offset_and_type
*ofs
25106 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25108 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25111 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25114 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25116 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25117 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25118 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25119 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25121 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25122 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25125 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25126 table if necessary. For convenience, return TYPE.
25128 The DIEs reading must have careful ordering to:
25129 * Not cause infinite loops trying to read in DIEs as a prerequisite for
25130 reading current DIE.
25131 * Not trying to dereference contents of still incompletely read in types
25132 while reading in other DIEs.
25133 * Enable referencing still incompletely read in types just by a pointer to
25134 the type without accessing its fields.
25136 Therefore caller should follow these rules:
25137 * Try to fetch any prerequisite types we may need to build this DIE type
25138 before building the type and calling set_die_type.
25139 * After building type call set_die_type for current DIE as soon as
25140 possible before fetching more types to complete the current type.
25141 * Make the type as complete as possible before fetching more types. */
25143 static struct type
*
25144 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
25145 bool skip_data_location
)
25147 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
25148 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25149 struct objfile
*objfile
= per_objfile
->objfile
;
25150 struct attribute
*attr
;
25151 struct dynamic_prop prop
;
25153 /* For Ada types, make sure that the gnat-specific data is always
25154 initialized (if not already set). There are a few types where
25155 we should not be doing so, because the type-specific area is
25156 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25157 where the type-specific area is used to store the floatformat).
25158 But this is not a problem, because the gnat-specific information
25159 is actually not needed for these types. */
25160 if (need_gnat_info (cu
)
25161 && type
->code () != TYPE_CODE_FUNC
25162 && type
->code () != TYPE_CODE_FLT
25163 && type
->code () != TYPE_CODE_METHODPTR
25164 && type
->code () != TYPE_CODE_MEMBERPTR
25165 && type
->code () != TYPE_CODE_METHOD
25166 && type
->code () != TYPE_CODE_FIXED_POINT
25167 && !HAVE_GNAT_AUX_INFO (type
))
25168 INIT_GNAT_SPECIFIC (type
);
25170 /* Read DW_AT_allocated and set in type. */
25171 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25174 struct type
*prop_type
= cu
->addr_sized_int_type (false);
25175 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25176 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
25179 /* Read DW_AT_associated and set in type. */
25180 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25183 struct type
*prop_type
= cu
->addr_sized_int_type (false);
25184 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25185 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
25188 /* Read DW_AT_data_location and set in type. */
25189 if (!skip_data_location
)
25191 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25192 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
25193 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
25196 if (per_objfile
->die_type_hash
== NULL
)
25197 per_objfile
->die_type_hash
25198 = htab_up (htab_create_alloc (127,
25199 per_cu_offset_and_type_hash
,
25200 per_cu_offset_and_type_eq
,
25201 NULL
, xcalloc
, xfree
));
25203 ofs
.per_cu
= cu
->per_cu
;
25204 ofs
.sect_off
= die
->sect_off
;
25206 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25207 htab_find_slot (per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
25209 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25210 sect_offset_str (die
->sect_off
));
25211 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25212 struct dwarf2_per_cu_offset_and_type
);
25217 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25218 or return NULL if the die does not have a saved type. */
25220 static struct type
*
25221 get_die_type_at_offset (sect_offset sect_off
,
25222 dwarf2_per_cu_data
*per_cu
,
25223 dwarf2_per_objfile
*per_objfile
)
25225 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25227 if (per_objfile
->die_type_hash
== NULL
)
25230 ofs
.per_cu
= per_cu
;
25231 ofs
.sect_off
= sect_off
;
25232 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25233 htab_find (per_objfile
->die_type_hash
.get (), &ofs
));
25240 /* Look up the type for DIE in CU in die_type_hash,
25241 or return NULL if DIE does not have a saved type. */
25243 static struct type
*
25244 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25246 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
, cu
->per_objfile
);
25249 /* Add a dependence relationship from CU to REF_PER_CU. */
25252 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25253 struct dwarf2_per_cu_data
*ref_per_cu
)
25257 if (cu
->dependencies
== NULL
)
25259 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25260 NULL
, &cu
->comp_unit_obstack
,
25261 hashtab_obstack_allocate
,
25262 dummy_obstack_deallocate
);
25264 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25266 *slot
= ref_per_cu
;
25269 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25270 Set the mark field in every compilation unit in the
25271 cache that we must keep because we are keeping CU.
25273 DATA is the dwarf2_per_objfile object in which to look up CUs. */
25276 dwarf2_mark_helper (void **slot
, void *data
)
25278 dwarf2_per_cu_data
*per_cu
= (dwarf2_per_cu_data
*) *slot
;
25279 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) data
;
25280 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
25282 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25283 reading of the chain. As such dependencies remain valid it is not much
25284 useful to track and undo them during QUIT cleanups. */
25293 if (cu
->dependencies
!= nullptr)
25294 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, per_objfile
);
25299 /* Set the mark field in CU and in every other compilation unit in the
25300 cache that we must keep because we are keeping CU. */
25303 dwarf2_mark (struct dwarf2_cu
*cu
)
25310 if (cu
->dependencies
!= nullptr)
25311 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, cu
->per_objfile
);
25314 /* Trivial hash function for partial_die_info: the hash value of a DIE
25315 is its offset in .debug_info for this objfile. */
25318 partial_die_hash (const void *item
)
25320 const struct partial_die_info
*part_die
25321 = (const struct partial_die_info
*) item
;
25323 return to_underlying (part_die
->sect_off
);
25326 /* Trivial comparison function for partial_die_info structures: two DIEs
25327 are equal if they have the same offset. */
25330 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25332 const struct partial_die_info
*part_die_lhs
25333 = (const struct partial_die_info
*) item_lhs
;
25334 const struct partial_die_info
*part_die_rhs
25335 = (const struct partial_die_info
*) item_rhs
;
25337 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25340 struct cmd_list_element
*set_dwarf_cmdlist
;
25341 struct cmd_list_element
*show_dwarf_cmdlist
;
25344 show_check_physname (struct ui_file
*file
, int from_tty
,
25345 struct cmd_list_element
*c
, const char *value
)
25347 fprintf_filtered (file
,
25348 _("Whether to check \"physname\" is %s.\n"),
25352 void _initialize_dwarf2_read ();
25354 _initialize_dwarf2_read ()
25356 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
25357 Set DWARF specific variables.\n\
25358 Configure DWARF variables such as the cache size."),
25359 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25360 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25362 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
25363 Show DWARF specific variables.\n\
25364 Show DWARF variables such as the cache size."),
25365 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25366 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25368 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25369 &dwarf_max_cache_age
, _("\
25370 Set the upper bound on the age of cached DWARF compilation units."), _("\
25371 Show the upper bound on the age of cached DWARF compilation units."), _("\
25372 A higher limit means that cached compilation units will be stored\n\
25373 in memory longer, and more total memory will be used. Zero disables\n\
25374 caching, which can slow down startup."),
25376 show_dwarf_max_cache_age
,
25377 &set_dwarf_cmdlist
,
25378 &show_dwarf_cmdlist
);
25380 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25381 Set debugging of the DWARF reader."), _("\
25382 Show debugging of the DWARF reader."), _("\
25383 When enabled (non-zero), debugging messages are printed during DWARF\n\
25384 reading and symtab expansion. A value of 1 (one) provides basic\n\
25385 information. A value greater than 1 provides more verbose information."),
25388 &setdebuglist
, &showdebuglist
);
25390 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25391 Set debugging of the DWARF DIE reader."), _("\
25392 Show debugging of the DWARF DIE reader."), _("\
25393 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25394 The value is the maximum depth to print."),
25397 &setdebuglist
, &showdebuglist
);
25399 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25400 Set debugging of the dwarf line reader."), _("\
25401 Show debugging of the dwarf line reader."), _("\
25402 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25403 A value of 1 (one) provides basic information.\n\
25404 A value greater than 1 provides more verbose information."),
25407 &setdebuglist
, &showdebuglist
);
25409 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25410 Set cross-checking of \"physname\" code against demangler."), _("\
25411 Show cross-checking of \"physname\" code against demangler."), _("\
25412 When enabled, GDB's internal \"physname\" code is checked against\n\
25414 NULL
, show_check_physname
,
25415 &setdebuglist
, &showdebuglist
);
25417 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25418 no_class
, &use_deprecated_index_sections
, _("\
25419 Set whether to use deprecated gdb_index sections."), _("\
25420 Show whether to use deprecated gdb_index sections."), _("\
25421 When enabled, deprecated .gdb_index sections are used anyway.\n\
25422 Normally they are ignored either because of a missing feature or\n\
25423 performance issue.\n\
25424 Warning: This option must be enabled before gdb reads the file."),
25427 &setlist
, &showlist
);
25429 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25430 &dwarf2_locexpr_funcs
);
25431 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25432 &dwarf2_loclist_funcs
);
25434 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25435 &dwarf2_block_frame_base_locexpr_funcs
);
25436 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25437 &dwarf2_block_frame_base_loclist_funcs
);
25440 selftests::register_test ("dw2_expand_symtabs_matching",
25441 selftests::dw2_expand_symtabs_matching::run_test
);
25442 selftests::register_test ("dwarf2_find_containing_comp_unit",
25443 selftests::find_containing_comp_unit::run_test
);