1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2017 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. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
58 #include "completer.h"
63 #include "gdbcore.h" /* for gnutarget */
64 #include "gdb/gdb-index.h"
69 #include "filestuff.h"
71 #include "namespace.h"
72 #include "common/gdb_unlinker.h"
73 #include "common/function-view.h"
74 #include "common/gdb_optional.h"
75 #include "common/underlying.h"
76 #include "common/byte-vector.h"
77 #include "filename-seen-cache.h"
80 #include <sys/types.h>
82 #include <unordered_set>
83 #include <unordered_map>
86 typedef struct symbol
*symbolp
;
89 /* When == 1, print basic high level tracing messages.
90 When > 1, be more verbose.
91 This is in contrast to the low level DIE reading of dwarf_die_debug. */
92 static unsigned int dwarf_read_debug
= 0;
94 /* When non-zero, dump DIEs after they are read in. */
95 static unsigned int dwarf_die_debug
= 0;
97 /* When non-zero, dump line number entries as they are read in. */
98 static unsigned int dwarf_line_debug
= 0;
100 /* When non-zero, cross-check physname against demangler. */
101 static int check_physname
= 0;
103 /* When non-zero, do not reject deprecated .gdb_index sections. */
104 static int use_deprecated_index_sections
= 0;
106 static const struct objfile_data
*dwarf2_objfile_data_key
;
108 /* The "aclass" indices for various kinds of computed DWARF symbols. */
110 static int dwarf2_locexpr_index
;
111 static int dwarf2_loclist_index
;
112 static int dwarf2_locexpr_block_index
;
113 static int dwarf2_loclist_block_index
;
115 /* A descriptor for dwarf sections.
117 S.ASECTION, SIZE are typically initialized when the objfile is first
118 scanned. BUFFER, READIN are filled in later when the section is read.
119 If the section contained compressed data then SIZE is updated to record
120 the uncompressed size of the section.
122 DWP file format V2 introduces a wrinkle that is easiest to handle by
123 creating the concept of virtual sections contained within a real section.
124 In DWP V2 the sections of the input DWO files are concatenated together
125 into one section, but section offsets are kept relative to the original
127 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
128 the real section this "virtual" section is contained in, and BUFFER,SIZE
129 describe the virtual section. */
131 struct dwarf2_section_info
135 /* If this is a real section, the bfd section. */
137 /* If this is a virtual section, pointer to the containing ("real")
139 struct dwarf2_section_info
*containing_section
;
141 /* Pointer to section data, only valid if readin. */
142 const gdb_byte
*buffer
;
143 /* The size of the section, real or virtual. */
145 /* If this is a virtual section, the offset in the real section.
146 Only valid if is_virtual. */
147 bfd_size_type virtual_offset
;
148 /* True if we have tried to read this section. */
150 /* True if this is a virtual section, False otherwise.
151 This specifies which of s.section and s.containing_section to use. */
155 typedef struct dwarf2_section_info dwarf2_section_info_def
;
156 DEF_VEC_O (dwarf2_section_info_def
);
158 /* All offsets in the index are of this type. It must be
159 architecture-independent. */
160 typedef uint32_t offset_type
;
162 DEF_VEC_I (offset_type
);
164 /* Ensure only legit values are used. */
165 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
167 gdb_assert ((unsigned int) (value) <= 1); \
168 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
171 /* Ensure only legit values are used. */
172 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
174 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
175 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
176 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
179 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
180 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
182 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
183 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
188 /* Convert VALUE between big- and little-endian. */
191 byte_swap (offset_type value
)
195 result
= (value
& 0xff) << 24;
196 result
|= (value
& 0xff00) << 8;
197 result
|= (value
& 0xff0000) >> 8;
198 result
|= (value
& 0xff000000) >> 24;
202 #define MAYBE_SWAP(V) byte_swap (V)
205 #define MAYBE_SWAP(V) static_cast<offset_type> (V)
206 #endif /* WORDS_BIGENDIAN */
208 /* An index into a (C++) symbol name component in a symbol name as
209 recorded in the mapped_index's symbol table. For each C++ symbol
210 in the symbol table, we record one entry for the start of each
211 component in the symbol in a table of name components, and then
212 sort the table, in order to be able to binary search symbol names,
213 ignoring leading namespaces, both completion and regular look up.
214 For example, for symbol "A::B::C", we'll have an entry that points
215 to "A::B::C", another that points to "B::C", and another for "C".
216 Note that function symbols in GDB index have no parameter
217 information, just the function/method names. You can convert a
218 name_component to a "const char *" using the
219 'mapped_index::symbol_name_at(offset_type)' method. */
221 struct name_component
223 /* Offset in the symbol name where the component starts. Stored as
224 a (32-bit) offset instead of a pointer to save memory and improve
225 locality on 64-bit architectures. */
226 offset_type name_offset
;
228 /* The symbol's index in the symbol and constant pool tables of a
233 /* A description of the mapped index. The file format is described in
234 a comment by the code that writes the index. */
237 /* Index data format version. */
240 /* The total length of the buffer. */
243 /* A pointer to the address table data. */
244 const gdb_byte
*address_table
;
246 /* Size of the address table data in bytes. */
247 offset_type address_table_size
;
249 /* The symbol table, implemented as a hash table. */
250 const offset_type
*symbol_table
;
252 /* Size in slots, each slot is 2 offset_types. */
253 offset_type symbol_table_slots
;
255 /* A pointer to the constant pool. */
256 const char *constant_pool
;
258 /* The name_component table (a sorted vector). See name_component's
259 description above. */
260 std::vector
<name_component
> name_components
;
262 /* Convenience method to get at the name of the symbol at IDX in the
264 const char *symbol_name_at (offset_type idx
) const
265 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
]); }
268 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
269 DEF_VEC_P (dwarf2_per_cu_ptr
);
273 int nr_uniq_abbrev_tables
;
275 int nr_symtab_sharers
;
276 int nr_stmt_less_type_units
;
277 int nr_all_type_units_reallocs
;
280 /* Collection of data recorded per objfile.
281 This hangs off of dwarf2_objfile_data_key. */
283 struct dwarf2_per_objfile
285 /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the
286 dwarf2 section names, or is NULL if the standard ELF names are
288 dwarf2_per_objfile (struct objfile
*objfile
,
289 const dwarf2_debug_sections
*names
);
291 ~dwarf2_per_objfile ();
293 DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile
);
295 /* Free all cached compilation units. */
296 void free_cached_comp_units ();
298 /* This function is mapped across the sections and remembers the
299 offset and size of each of the debugging sections we are
301 void locate_sections (bfd
*abfd
, asection
*sectp
,
302 const dwarf2_debug_sections
&names
);
305 dwarf2_section_info info
{};
306 dwarf2_section_info abbrev
{};
307 dwarf2_section_info line
{};
308 dwarf2_section_info loc
{};
309 dwarf2_section_info loclists
{};
310 dwarf2_section_info macinfo
{};
311 dwarf2_section_info macro
{};
312 dwarf2_section_info str
{};
313 dwarf2_section_info line_str
{};
314 dwarf2_section_info ranges
{};
315 dwarf2_section_info rnglists
{};
316 dwarf2_section_info addr
{};
317 dwarf2_section_info frame
{};
318 dwarf2_section_info eh_frame
{};
319 dwarf2_section_info gdb_index
{};
321 VEC (dwarf2_section_info_def
) *types
= NULL
;
324 struct objfile
*objfile
= NULL
;
326 /* Table of all the compilation units. This is used to locate
327 the target compilation unit of a particular reference. */
328 struct dwarf2_per_cu_data
**all_comp_units
= NULL
;
330 /* The number of compilation units in ALL_COMP_UNITS. */
331 int n_comp_units
= 0;
333 /* The number of .debug_types-related CUs. */
334 int n_type_units
= 0;
336 /* The number of elements allocated in all_type_units.
337 If there are skeleton-less TUs, we add them to all_type_units lazily. */
338 int n_allocated_type_units
= 0;
340 /* The .debug_types-related CUs (TUs).
341 This is stored in malloc space because we may realloc it. */
342 struct signatured_type
**all_type_units
= NULL
;
344 /* Table of struct type_unit_group objects.
345 The hash key is the DW_AT_stmt_list value. */
346 htab_t type_unit_groups
{};
348 /* A table mapping .debug_types signatures to its signatured_type entry.
349 This is NULL if the .debug_types section hasn't been read in yet. */
350 htab_t signatured_types
{};
352 /* Type unit statistics, to see how well the scaling improvements
354 struct tu_stats tu_stats
{};
356 /* A chain of compilation units that are currently read in, so that
357 they can be freed later. */
358 dwarf2_per_cu_data
*read_in_chain
= NULL
;
360 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
361 This is NULL if the table hasn't been allocated yet. */
364 /* True if we've checked for whether there is a DWP file. */
365 bool dwp_checked
= false;
367 /* The DWP file if there is one, or NULL. */
368 struct dwp_file
*dwp_file
= NULL
;
370 /* The shared '.dwz' file, if one exists. This is used when the
371 original data was compressed using 'dwz -m'. */
372 struct dwz_file
*dwz_file
= NULL
;
374 /* A flag indicating whether this objfile has a section loaded at a
376 bool has_section_at_zero
= false;
378 /* True if we are using the mapped index,
379 or we are faking it for OBJF_READNOW's sake. */
380 bool using_index
= false;
382 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
383 mapped_index
*index_table
= NULL
;
385 /* When using index_table, this keeps track of all quick_file_names entries.
386 TUs typically share line table entries with a CU, so we maintain a
387 separate table of all line table entries to support the sharing.
388 Note that while there can be way more TUs than CUs, we've already
389 sorted all the TUs into "type unit groups", grouped by their
390 DW_AT_stmt_list value. Therefore the only sharing done here is with a
391 CU and its associated TU group if there is one. */
392 htab_t quick_file_names_table
{};
394 /* Set during partial symbol reading, to prevent queueing of full
396 bool reading_partial_symbols
= false;
398 /* Table mapping type DIEs to their struct type *.
399 This is NULL if not allocated yet.
400 The mapping is done via (CU/TU + DIE offset) -> type. */
401 htab_t die_type_hash
{};
403 /* The CUs we recently read. */
404 VEC (dwarf2_per_cu_ptr
) *just_read_cus
= NULL
;
406 /* Table containing line_header indexed by offset and offset_in_dwz. */
407 htab_t line_header_hash
{};
409 /* Table containing all filenames. This is an optional because the
410 table is lazily constructed on first access. */
411 gdb::optional
<filename_seen_cache
> filenames_cache
;
414 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
416 /* Default names of the debugging sections. */
418 /* Note that if the debugging section has been compressed, it might
419 have a name like .zdebug_info. */
421 static const struct dwarf2_debug_sections dwarf2_elf_names
=
423 { ".debug_info", ".zdebug_info" },
424 { ".debug_abbrev", ".zdebug_abbrev" },
425 { ".debug_line", ".zdebug_line" },
426 { ".debug_loc", ".zdebug_loc" },
427 { ".debug_loclists", ".zdebug_loclists" },
428 { ".debug_macinfo", ".zdebug_macinfo" },
429 { ".debug_macro", ".zdebug_macro" },
430 { ".debug_str", ".zdebug_str" },
431 { ".debug_line_str", ".zdebug_line_str" },
432 { ".debug_ranges", ".zdebug_ranges" },
433 { ".debug_rnglists", ".zdebug_rnglists" },
434 { ".debug_types", ".zdebug_types" },
435 { ".debug_addr", ".zdebug_addr" },
436 { ".debug_frame", ".zdebug_frame" },
437 { ".eh_frame", NULL
},
438 { ".gdb_index", ".zgdb_index" },
442 /* List of DWO/DWP sections. */
444 static const struct dwop_section_names
446 struct dwarf2_section_names abbrev_dwo
;
447 struct dwarf2_section_names info_dwo
;
448 struct dwarf2_section_names line_dwo
;
449 struct dwarf2_section_names loc_dwo
;
450 struct dwarf2_section_names loclists_dwo
;
451 struct dwarf2_section_names macinfo_dwo
;
452 struct dwarf2_section_names macro_dwo
;
453 struct dwarf2_section_names str_dwo
;
454 struct dwarf2_section_names str_offsets_dwo
;
455 struct dwarf2_section_names types_dwo
;
456 struct dwarf2_section_names cu_index
;
457 struct dwarf2_section_names tu_index
;
461 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
462 { ".debug_info.dwo", ".zdebug_info.dwo" },
463 { ".debug_line.dwo", ".zdebug_line.dwo" },
464 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
465 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
466 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
467 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
468 { ".debug_str.dwo", ".zdebug_str.dwo" },
469 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
470 { ".debug_types.dwo", ".zdebug_types.dwo" },
471 { ".debug_cu_index", ".zdebug_cu_index" },
472 { ".debug_tu_index", ".zdebug_tu_index" },
475 /* local data types */
477 /* The data in a compilation unit header, after target2host
478 translation, looks like this. */
479 struct comp_unit_head
483 unsigned char addr_size
;
484 unsigned char signed_addr_p
;
485 sect_offset abbrev_sect_off
;
487 /* Size of file offsets; either 4 or 8. */
488 unsigned int offset_size
;
490 /* Size of the length field; either 4 or 12. */
491 unsigned int initial_length_size
;
493 enum dwarf_unit_type unit_type
;
495 /* Offset to the first byte of this compilation unit header in the
496 .debug_info section, for resolving relative reference dies. */
497 sect_offset sect_off
;
499 /* Offset to first die in this cu from the start of the cu.
500 This will be the first byte following the compilation unit header. */
501 cu_offset first_die_cu_offset
;
503 /* 64-bit signature of this type unit - it is valid only for
504 UNIT_TYPE DW_UT_type. */
507 /* For types, offset in the type's DIE of the type defined by this TU. */
508 cu_offset type_cu_offset_in_tu
;
511 /* Type used for delaying computation of method physnames.
512 See comments for compute_delayed_physnames. */
513 struct delayed_method_info
515 /* The type to which the method is attached, i.e., its parent class. */
518 /* The index of the method in the type's function fieldlists. */
521 /* The index of the method in the fieldlist. */
524 /* The name of the DIE. */
527 /* The DIE associated with this method. */
528 struct die_info
*die
;
531 typedef struct delayed_method_info delayed_method_info
;
532 DEF_VEC_O (delayed_method_info
);
534 /* Internal state when decoding a particular compilation unit. */
537 /* The objfile containing this compilation unit. */
538 struct objfile
*objfile
;
540 /* The header of the compilation unit. */
541 struct comp_unit_head header
;
543 /* Base address of this compilation unit. */
544 CORE_ADDR base_address
;
546 /* Non-zero if base_address has been set. */
549 /* The language we are debugging. */
550 enum language language
;
551 const struct language_defn
*language_defn
;
553 const char *producer
;
555 /* The generic symbol table building routines have separate lists for
556 file scope symbols and all all other scopes (local scopes). So
557 we need to select the right one to pass to add_symbol_to_list().
558 We do it by keeping a pointer to the correct list in list_in_scope.
560 FIXME: The original dwarf code just treated the file scope as the
561 first local scope, and all other local scopes as nested local
562 scopes, and worked fine. Check to see if we really need to
563 distinguish these in buildsym.c. */
564 struct pending
**list_in_scope
;
566 /* The abbrev table for this CU.
567 Normally this points to the abbrev table in the objfile.
568 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
569 struct abbrev_table
*abbrev_table
;
571 /* Hash table holding all the loaded partial DIEs
572 with partial_die->offset.SECT_OFF as hash. */
575 /* Storage for things with the same lifetime as this read-in compilation
576 unit, including partial DIEs. */
577 struct obstack comp_unit_obstack
;
579 /* When multiple dwarf2_cu structures are living in memory, this field
580 chains them all together, so that they can be released efficiently.
581 We will probably also want a generation counter so that most-recently-used
582 compilation units are cached... */
583 struct dwarf2_per_cu_data
*read_in_chain
;
585 /* Backlink to our per_cu entry. */
586 struct dwarf2_per_cu_data
*per_cu
;
588 /* How many compilation units ago was this CU last referenced? */
591 /* A hash table of DIE cu_offset for following references with
592 die_info->offset.sect_off as hash. */
595 /* Full DIEs if read in. */
596 struct die_info
*dies
;
598 /* A set of pointers to dwarf2_per_cu_data objects for compilation
599 units referenced by this one. Only set during full symbol processing;
600 partial symbol tables do not have dependencies. */
603 /* Header data from the line table, during full symbol processing. */
604 struct line_header
*line_header
;
605 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
606 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
607 this is the DW_TAG_compile_unit die for this CU. We'll hold on
608 to the line header as long as this DIE is being processed. See
609 process_die_scope. */
610 die_info
*line_header_die_owner
;
612 /* A list of methods which need to have physnames computed
613 after all type information has been read. */
614 VEC (delayed_method_info
) *method_list
;
616 /* To be copied to symtab->call_site_htab. */
617 htab_t call_site_htab
;
619 /* Non-NULL if this CU came from a DWO file.
620 There is an invariant here that is important to remember:
621 Except for attributes copied from the top level DIE in the "main"
622 (or "stub") file in preparation for reading the DWO file
623 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
624 Either there isn't a DWO file (in which case this is NULL and the point
625 is moot), or there is and either we're not going to read it (in which
626 case this is NULL) or there is and we are reading it (in which case this
628 struct dwo_unit
*dwo_unit
;
630 /* The DW_AT_addr_base attribute if present, zero otherwise
631 (zero is a valid value though).
632 Note this value comes from the Fission stub CU/TU's DIE. */
635 /* The DW_AT_ranges_base attribute if present, zero otherwise
636 (zero is a valid value though).
637 Note this value comes from the Fission stub CU/TU's DIE.
638 Also note that the value is zero in the non-DWO case so this value can
639 be used without needing to know whether DWO files are in use or not.
640 N.B. This does not apply to DW_AT_ranges appearing in
641 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
642 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
643 DW_AT_ranges_base *would* have to be applied, and we'd have to care
644 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
645 ULONGEST ranges_base
;
647 /* Mark used when releasing cached dies. */
648 unsigned int mark
: 1;
650 /* This CU references .debug_loc. See the symtab->locations_valid field.
651 This test is imperfect as there may exist optimized debug code not using
652 any location list and still facing inlining issues if handled as
653 unoptimized code. For a future better test see GCC PR other/32998. */
654 unsigned int has_loclist
: 1;
656 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
657 if all the producer_is_* fields are valid. This information is cached
658 because profiling CU expansion showed excessive time spent in
659 producer_is_gxx_lt_4_6. */
660 unsigned int checked_producer
: 1;
661 unsigned int producer_is_gxx_lt_4_6
: 1;
662 unsigned int producer_is_gcc_lt_4_3
: 1;
663 unsigned int producer_is_icc_lt_14
: 1;
665 /* When set, the file that we're processing is known to have
666 debugging info for C++ namespaces. GCC 3.3.x did not produce
667 this information, but later versions do. */
669 unsigned int processing_has_namespace_info
: 1;
672 /* Persistent data held for a compilation unit, even when not
673 processing it. We put a pointer to this structure in the
674 read_symtab_private field of the psymtab. */
676 struct dwarf2_per_cu_data
678 /* The start offset and length of this compilation unit.
679 NOTE: Unlike comp_unit_head.length, this length includes
681 If the DIE refers to a DWO file, this is always of the original die,
683 sect_offset sect_off
;
686 /* DWARF standard version this data has been read from (such as 4 or 5). */
689 /* Flag indicating this compilation unit will be read in before
690 any of the current compilation units are processed. */
691 unsigned int queued
: 1;
693 /* This flag will be set when reading partial DIEs if we need to load
694 absolutely all DIEs for this compilation unit, instead of just the ones
695 we think are interesting. It gets set if we look for a DIE in the
696 hash table and don't find it. */
697 unsigned int load_all_dies
: 1;
699 /* Non-zero if this CU is from .debug_types.
700 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
702 unsigned int is_debug_types
: 1;
704 /* Non-zero if this CU is from the .dwz file. */
705 unsigned int is_dwz
: 1;
707 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
708 This flag is only valid if is_debug_types is true.
709 We can't read a CU directly from a DWO file: There are required
710 attributes in the stub. */
711 unsigned int reading_dwo_directly
: 1;
713 /* Non-zero if the TU has been read.
714 This is used to assist the "Stay in DWO Optimization" for Fission:
715 When reading a DWO, it's faster to read TUs from the DWO instead of
716 fetching them from random other DWOs (due to comdat folding).
717 If the TU has already been read, the optimization is unnecessary
718 (and unwise - we don't want to change where gdb thinks the TU lives
720 This flag is only valid if is_debug_types is true. */
721 unsigned int tu_read
: 1;
723 /* The section this CU/TU lives in.
724 If the DIE refers to a DWO file, this is always the original die,
726 struct dwarf2_section_info
*section
;
728 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
729 of the CU cache it gets reset to NULL again. This is left as NULL for
730 dummy CUs (a CU header, but nothing else). */
731 struct dwarf2_cu
*cu
;
733 /* The corresponding objfile.
734 Normally we can get the objfile from dwarf2_per_objfile.
735 However we can enter this file with just a "per_cu" handle. */
736 struct objfile
*objfile
;
738 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
739 is active. Otherwise, the 'psymtab' field is active. */
742 /* The partial symbol table associated with this compilation unit,
743 or NULL for unread partial units. */
744 struct partial_symtab
*psymtab
;
746 /* Data needed by the "quick" functions. */
747 struct dwarf2_per_cu_quick_data
*quick
;
750 /* The CUs we import using DW_TAG_imported_unit. This is filled in
751 while reading psymtabs, used to compute the psymtab dependencies,
752 and then cleared. Then it is filled in again while reading full
753 symbols, and only deleted when the objfile is destroyed.
755 This is also used to work around a difference between the way gold
756 generates .gdb_index version <=7 and the way gdb does. Arguably this
757 is a gold bug. For symbols coming from TUs, gold records in the index
758 the CU that includes the TU instead of the TU itself. This breaks
759 dw2_lookup_symbol: It assumes that if the index says symbol X lives
760 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
761 will find X. Alas TUs live in their own symtab, so after expanding CU Y
762 we need to look in TU Z to find X. Fortunately, this is akin to
763 DW_TAG_imported_unit, so we just use the same mechanism: For
764 .gdb_index version <=7 this also records the TUs that the CU referred
765 to. Concurrently with this change gdb was modified to emit version 8
766 indices so we only pay a price for gold generated indices.
767 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
768 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
771 /* Entry in the signatured_types hash table. */
773 struct signatured_type
775 /* The "per_cu" object of this type.
776 This struct is used iff per_cu.is_debug_types.
777 N.B.: This is the first member so that it's easy to convert pointers
779 struct dwarf2_per_cu_data per_cu
;
781 /* The type's signature. */
784 /* Offset in the TU of the type's DIE, as read from the TU header.
785 If this TU is a DWO stub and the definition lives in a DWO file
786 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
787 cu_offset type_offset_in_tu
;
789 /* Offset in the section of the type's DIE.
790 If the definition lives in a DWO file, this is the offset in the
791 .debug_types.dwo section.
792 The value is zero until the actual value is known.
793 Zero is otherwise not a valid section offset. */
794 sect_offset type_offset_in_section
;
796 /* Type units are grouped by their DW_AT_stmt_list entry so that they
797 can share them. This points to the containing symtab. */
798 struct type_unit_group
*type_unit_group
;
801 The first time we encounter this type we fully read it in and install it
802 in the symbol tables. Subsequent times we only need the type. */
805 /* Containing DWO unit.
806 This field is valid iff per_cu.reading_dwo_directly. */
807 struct dwo_unit
*dwo_unit
;
810 typedef struct signatured_type
*sig_type_ptr
;
811 DEF_VEC_P (sig_type_ptr
);
813 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
814 This includes type_unit_group and quick_file_names. */
816 struct stmt_list_hash
818 /* The DWO unit this table is from or NULL if there is none. */
819 struct dwo_unit
*dwo_unit
;
821 /* Offset in .debug_line or .debug_line.dwo. */
822 sect_offset line_sect_off
;
825 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
826 an object of this type. */
828 struct type_unit_group
830 /* dwarf2read.c's main "handle" on a TU symtab.
831 To simplify things we create an artificial CU that "includes" all the
832 type units using this stmt_list so that the rest of the code still has
833 a "per_cu" handle on the symtab.
834 This PER_CU is recognized by having no section. */
835 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
836 struct dwarf2_per_cu_data per_cu
;
838 /* The TUs that share this DW_AT_stmt_list entry.
839 This is added to while parsing type units to build partial symtabs,
840 and is deleted afterwards and not used again. */
841 VEC (sig_type_ptr
) *tus
;
843 /* The compunit symtab.
844 Type units in a group needn't all be defined in the same source file,
845 so we create an essentially anonymous symtab as the compunit symtab. */
846 struct compunit_symtab
*compunit_symtab
;
848 /* The data used to construct the hash key. */
849 struct stmt_list_hash hash
;
851 /* The number of symtabs from the line header.
852 The value here must match line_header.num_file_names. */
853 unsigned int num_symtabs
;
855 /* The symbol tables for this TU (obtained from the files listed in
857 WARNING: The order of entries here must match the order of entries
858 in the line header. After the first TU using this type_unit_group, the
859 line header for the subsequent TUs is recreated from this. This is done
860 because we need to use the same symtabs for each TU using the same
861 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
862 there's no guarantee the line header doesn't have duplicate entries. */
863 struct symtab
**symtabs
;
866 /* These sections are what may appear in a (real or virtual) DWO file. */
870 struct dwarf2_section_info abbrev
;
871 struct dwarf2_section_info line
;
872 struct dwarf2_section_info loc
;
873 struct dwarf2_section_info loclists
;
874 struct dwarf2_section_info macinfo
;
875 struct dwarf2_section_info macro
;
876 struct dwarf2_section_info str
;
877 struct dwarf2_section_info str_offsets
;
878 /* In the case of a virtual DWO file, these two are unused. */
879 struct dwarf2_section_info info
;
880 VEC (dwarf2_section_info_def
) *types
;
883 /* CUs/TUs in DWP/DWO files. */
887 /* Backlink to the containing struct dwo_file. */
888 struct dwo_file
*dwo_file
;
890 /* The "id" that distinguishes this CU/TU.
891 .debug_info calls this "dwo_id", .debug_types calls this "signature".
892 Since signatures came first, we stick with it for consistency. */
895 /* The section this CU/TU lives in, in the DWO file. */
896 struct dwarf2_section_info
*section
;
898 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
899 sect_offset sect_off
;
902 /* For types, offset in the type's DIE of the type defined by this TU. */
903 cu_offset type_offset_in_tu
;
906 /* include/dwarf2.h defines the DWP section codes.
907 It defines a max value but it doesn't define a min value, which we
908 use for error checking, so provide one. */
910 enum dwp_v2_section_ids
915 /* Data for one DWO file.
917 This includes virtual DWO files (a virtual DWO file is a DWO file as it
918 appears in a DWP file). DWP files don't really have DWO files per se -
919 comdat folding of types "loses" the DWO file they came from, and from
920 a high level view DWP files appear to contain a mass of random types.
921 However, to maintain consistency with the non-DWP case we pretend DWP
922 files contain virtual DWO files, and we assign each TU with one virtual
923 DWO file (generally based on the line and abbrev section offsets -
924 a heuristic that seems to work in practice). */
928 /* The DW_AT_GNU_dwo_name attribute.
929 For virtual DWO files the name is constructed from the section offsets
930 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
931 from related CU+TUs. */
932 const char *dwo_name
;
934 /* The DW_AT_comp_dir attribute. */
935 const char *comp_dir
;
937 /* The bfd, when the file is open. Otherwise this is NULL.
938 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
941 /* The sections that make up this DWO file.
942 Remember that for virtual DWO files in DWP V2, these are virtual
943 sections (for lack of a better name). */
944 struct dwo_sections sections
;
946 /* The CUs in the file.
947 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
948 an extension to handle LLVM's Link Time Optimization output (where
949 multiple source files may be compiled into a single object/dwo pair). */
952 /* Table of TUs in the file.
953 Each element is a struct dwo_unit. */
957 /* These sections are what may appear in a DWP file. */
961 /* These are used by both DWP version 1 and 2. */
962 struct dwarf2_section_info str
;
963 struct dwarf2_section_info cu_index
;
964 struct dwarf2_section_info tu_index
;
966 /* These are only used by DWP version 2 files.
967 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
968 sections are referenced by section number, and are not recorded here.
969 In DWP version 2 there is at most one copy of all these sections, each
970 section being (effectively) comprised of the concatenation of all of the
971 individual sections that exist in the version 1 format.
972 To keep the code simple we treat each of these concatenated pieces as a
973 section itself (a virtual section?). */
974 struct dwarf2_section_info abbrev
;
975 struct dwarf2_section_info info
;
976 struct dwarf2_section_info line
;
977 struct dwarf2_section_info loc
;
978 struct dwarf2_section_info macinfo
;
979 struct dwarf2_section_info macro
;
980 struct dwarf2_section_info str_offsets
;
981 struct dwarf2_section_info types
;
984 /* These sections are what may appear in a virtual DWO file in DWP version 1.
985 A virtual DWO file is a DWO file as it appears in a DWP file. */
987 struct virtual_v1_dwo_sections
989 struct dwarf2_section_info abbrev
;
990 struct dwarf2_section_info line
;
991 struct dwarf2_section_info loc
;
992 struct dwarf2_section_info macinfo
;
993 struct dwarf2_section_info macro
;
994 struct dwarf2_section_info str_offsets
;
995 /* Each DWP hash table entry records one CU or one TU.
996 That is recorded here, and copied to dwo_unit.section. */
997 struct dwarf2_section_info info_or_types
;
1000 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
1001 In version 2, the sections of the DWO files are concatenated together
1002 and stored in one section of that name. Thus each ELF section contains
1003 several "virtual" sections. */
1005 struct virtual_v2_dwo_sections
1007 bfd_size_type abbrev_offset
;
1008 bfd_size_type abbrev_size
;
1010 bfd_size_type line_offset
;
1011 bfd_size_type line_size
;
1013 bfd_size_type loc_offset
;
1014 bfd_size_type loc_size
;
1016 bfd_size_type macinfo_offset
;
1017 bfd_size_type macinfo_size
;
1019 bfd_size_type macro_offset
;
1020 bfd_size_type macro_size
;
1022 bfd_size_type str_offsets_offset
;
1023 bfd_size_type str_offsets_size
;
1025 /* Each DWP hash table entry records one CU or one TU.
1026 That is recorded here, and copied to dwo_unit.section. */
1027 bfd_size_type info_or_types_offset
;
1028 bfd_size_type info_or_types_size
;
1031 /* Contents of DWP hash tables. */
1033 struct dwp_hash_table
1035 uint32_t version
, nr_columns
;
1036 uint32_t nr_units
, nr_slots
;
1037 const gdb_byte
*hash_table
, *unit_table
;
1042 const gdb_byte
*indices
;
1046 /* This is indexed by column number and gives the id of the section
1048 #define MAX_NR_V2_DWO_SECTIONS \
1049 (1 /* .debug_info or .debug_types */ \
1050 + 1 /* .debug_abbrev */ \
1051 + 1 /* .debug_line */ \
1052 + 1 /* .debug_loc */ \
1053 + 1 /* .debug_str_offsets */ \
1054 + 1 /* .debug_macro or .debug_macinfo */)
1055 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
1056 const gdb_byte
*offsets
;
1057 const gdb_byte
*sizes
;
1062 /* Data for one DWP file. */
1066 /* Name of the file. */
1069 /* File format version. */
1075 /* Section info for this file. */
1076 struct dwp_sections sections
;
1078 /* Table of CUs in the file. */
1079 const struct dwp_hash_table
*cus
;
1081 /* Table of TUs in the file. */
1082 const struct dwp_hash_table
*tus
;
1084 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
1088 /* Table to map ELF section numbers to their sections.
1089 This is only needed for the DWP V1 file format. */
1090 unsigned int num_sections
;
1091 asection
**elf_sections
;
1094 /* This represents a '.dwz' file. */
1098 /* A dwz file can only contain a few sections. */
1099 struct dwarf2_section_info abbrev
;
1100 struct dwarf2_section_info info
;
1101 struct dwarf2_section_info str
;
1102 struct dwarf2_section_info line
;
1103 struct dwarf2_section_info macro
;
1104 struct dwarf2_section_info gdb_index
;
1106 /* The dwz's BFD. */
1110 /* Struct used to pass misc. parameters to read_die_and_children, et
1111 al. which are used for both .debug_info and .debug_types dies.
1112 All parameters here are unchanging for the life of the call. This
1113 struct exists to abstract away the constant parameters of die reading. */
1115 struct die_reader_specs
1117 /* The bfd of die_section. */
1120 /* The CU of the DIE we are parsing. */
1121 struct dwarf2_cu
*cu
;
1123 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1124 struct dwo_file
*dwo_file
;
1126 /* The section the die comes from.
1127 This is either .debug_info or .debug_types, or the .dwo variants. */
1128 struct dwarf2_section_info
*die_section
;
1130 /* die_section->buffer. */
1131 const gdb_byte
*buffer
;
1133 /* The end of the buffer. */
1134 const gdb_byte
*buffer_end
;
1136 /* The value of the DW_AT_comp_dir attribute. */
1137 const char *comp_dir
;
1140 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1141 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1142 const gdb_byte
*info_ptr
,
1143 struct die_info
*comp_unit_die
,
1147 /* A 1-based directory index. This is a strong typedef to prevent
1148 accidentally using a directory index as a 0-based index into an
1150 enum class dir_index
: unsigned int {};
1152 /* Likewise, a 1-based file name index. */
1153 enum class file_name_index
: unsigned int {};
1157 file_entry () = default;
1159 file_entry (const char *name_
, dir_index d_index_
,
1160 unsigned int mod_time_
, unsigned int length_
)
1163 mod_time (mod_time_
),
1167 /* Return the include directory at D_INDEX stored in LH. Returns
1168 NULL if D_INDEX is out of bounds. */
1169 const char *include_dir (const line_header
*lh
) const;
1171 /* The file name. Note this is an observing pointer. The memory is
1172 owned by debug_line_buffer. */
1173 const char *name
{};
1175 /* The directory index (1-based). */
1176 dir_index d_index
{};
1178 unsigned int mod_time
{};
1180 unsigned int length
{};
1182 /* True if referenced by the Line Number Program. */
1185 /* The associated symbol table, if any. */
1186 struct symtab
*symtab
{};
1189 /* The line number information for a compilation unit (found in the
1190 .debug_line section) begins with a "statement program header",
1191 which contains the following information. */
1198 /* Add an entry to the include directory table. */
1199 void add_include_dir (const char *include_dir
);
1201 /* Add an entry to the file name table. */
1202 void add_file_name (const char *name
, dir_index d_index
,
1203 unsigned int mod_time
, unsigned int length
);
1205 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1206 is out of bounds. */
1207 const char *include_dir_at (dir_index index
) const
1209 /* Convert directory index number (1-based) to vector index
1211 size_t vec_index
= to_underlying (index
) - 1;
1213 if (vec_index
>= include_dirs
.size ())
1215 return include_dirs
[vec_index
];
1218 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1219 is out of bounds. */
1220 file_entry
*file_name_at (file_name_index index
)
1222 /* Convert file name index number (1-based) to vector index
1224 size_t vec_index
= to_underlying (index
) - 1;
1226 if (vec_index
>= file_names
.size ())
1228 return &file_names
[vec_index
];
1231 /* Const version of the above. */
1232 const file_entry
*file_name_at (unsigned int index
) const
1234 if (index
>= file_names
.size ())
1236 return &file_names
[index
];
1239 /* Offset of line number information in .debug_line section. */
1240 sect_offset sect_off
{};
1242 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1243 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1245 unsigned int total_length
{};
1246 unsigned short version
{};
1247 unsigned int header_length
{};
1248 unsigned char minimum_instruction_length
{};
1249 unsigned char maximum_ops_per_instruction
{};
1250 unsigned char default_is_stmt
{};
1252 unsigned char line_range
{};
1253 unsigned char opcode_base
{};
1255 /* standard_opcode_lengths[i] is the number of operands for the
1256 standard opcode whose value is i. This means that
1257 standard_opcode_lengths[0] is unused, and the last meaningful
1258 element is standard_opcode_lengths[opcode_base - 1]. */
1259 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1261 /* The include_directories table. Note these are observing
1262 pointers. The memory is owned by debug_line_buffer. */
1263 std::vector
<const char *> include_dirs
;
1265 /* The file_names table. */
1266 std::vector
<file_entry
> file_names
;
1268 /* The start and end of the statement program following this
1269 header. These point into dwarf2_per_objfile->line_buffer. */
1270 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1273 typedef std::unique_ptr
<line_header
> line_header_up
;
1276 file_entry::include_dir (const line_header
*lh
) const
1278 return lh
->include_dir_at (d_index
);
1281 /* When we construct a partial symbol table entry we only
1282 need this much information. */
1283 struct partial_die_info
1285 /* Offset of this DIE. */
1286 sect_offset sect_off
;
1288 /* DWARF-2 tag for this DIE. */
1289 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1291 /* Assorted flags describing the data found in this DIE. */
1292 unsigned int has_children
: 1;
1293 unsigned int is_external
: 1;
1294 unsigned int is_declaration
: 1;
1295 unsigned int has_type
: 1;
1296 unsigned int has_specification
: 1;
1297 unsigned int has_pc_info
: 1;
1298 unsigned int may_be_inlined
: 1;
1300 /* This DIE has been marked DW_AT_main_subprogram. */
1301 unsigned int main_subprogram
: 1;
1303 /* Flag set if the SCOPE field of this structure has been
1305 unsigned int scope_set
: 1;
1307 /* Flag set if the DIE has a byte_size attribute. */
1308 unsigned int has_byte_size
: 1;
1310 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1311 unsigned int has_const_value
: 1;
1313 /* Flag set if any of the DIE's children are template arguments. */
1314 unsigned int has_template_arguments
: 1;
1316 /* Flag set if fixup_partial_die has been called on this die. */
1317 unsigned int fixup_called
: 1;
1319 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1320 unsigned int is_dwz
: 1;
1322 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1323 unsigned int spec_is_dwz
: 1;
1325 /* The name of this DIE. Normally the value of DW_AT_name, but
1326 sometimes a default name for unnamed DIEs. */
1329 /* The linkage name, if present. */
1330 const char *linkage_name
;
1332 /* The scope to prepend to our children. This is generally
1333 allocated on the comp_unit_obstack, so will disappear
1334 when this compilation unit leaves the cache. */
1337 /* Some data associated with the partial DIE. The tag determines
1338 which field is live. */
1341 /* The location description associated with this DIE, if any. */
1342 struct dwarf_block
*locdesc
;
1343 /* The offset of an import, for DW_TAG_imported_unit. */
1344 sect_offset sect_off
;
1347 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1351 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1352 DW_AT_sibling, if any. */
1353 /* NOTE: This member isn't strictly necessary, read_partial_die could
1354 return DW_AT_sibling values to its caller load_partial_dies. */
1355 const gdb_byte
*sibling
;
1357 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1358 DW_AT_specification (or DW_AT_abstract_origin or
1359 DW_AT_extension). */
1360 sect_offset spec_offset
;
1362 /* Pointers to this DIE's parent, first child, and next sibling,
1364 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1367 /* This data structure holds the information of an abbrev. */
1370 unsigned int number
; /* number identifying abbrev */
1371 enum dwarf_tag tag
; /* dwarf tag */
1372 unsigned short has_children
; /* boolean */
1373 unsigned short num_attrs
; /* number of attributes */
1374 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1375 struct abbrev_info
*next
; /* next in chain */
1380 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1381 ENUM_BITFIELD(dwarf_form
) form
: 16;
1383 /* It is valid only if FORM is DW_FORM_implicit_const. */
1384 LONGEST implicit_const
;
1387 /* Size of abbrev_table.abbrev_hash_table. */
1388 #define ABBREV_HASH_SIZE 121
1390 /* Top level data structure to contain an abbreviation table. */
1394 /* Where the abbrev table came from.
1395 This is used as a sanity check when the table is used. */
1396 sect_offset sect_off
;
1398 /* Storage for the abbrev table. */
1399 struct obstack abbrev_obstack
;
1401 /* Hash table of abbrevs.
1402 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1403 It could be statically allocated, but the previous code didn't so we
1405 struct abbrev_info
**abbrevs
;
1408 /* Attributes have a name and a value. */
1411 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1412 ENUM_BITFIELD(dwarf_form
) form
: 15;
1414 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1415 field should be in u.str (existing only for DW_STRING) but it is kept
1416 here for better struct attribute alignment. */
1417 unsigned int string_is_canonical
: 1;
1422 struct dwarf_block
*blk
;
1431 /* This data structure holds a complete die structure. */
1434 /* DWARF-2 tag for this DIE. */
1435 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1437 /* Number of attributes */
1438 unsigned char num_attrs
;
1440 /* True if we're presently building the full type name for the
1441 type derived from this DIE. */
1442 unsigned char building_fullname
: 1;
1444 /* True if this die is in process. PR 16581. */
1445 unsigned char in_process
: 1;
1448 unsigned int abbrev
;
1450 /* Offset in .debug_info or .debug_types section. */
1451 sect_offset sect_off
;
1453 /* The dies in a compilation unit form an n-ary tree. PARENT
1454 points to this die's parent; CHILD points to the first child of
1455 this node; and all the children of a given node are chained
1456 together via their SIBLING fields. */
1457 struct die_info
*child
; /* Its first child, if any. */
1458 struct die_info
*sibling
; /* Its next sibling, if any. */
1459 struct die_info
*parent
; /* Its parent, if any. */
1461 /* An array of attributes, with NUM_ATTRS elements. There may be
1462 zero, but it's not common and zero-sized arrays are not
1463 sufficiently portable C. */
1464 struct attribute attrs
[1];
1467 /* Get at parts of an attribute structure. */
1469 #define DW_STRING(attr) ((attr)->u.str)
1470 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1471 #define DW_UNSND(attr) ((attr)->u.unsnd)
1472 #define DW_BLOCK(attr) ((attr)->u.blk)
1473 #define DW_SND(attr) ((attr)->u.snd)
1474 #define DW_ADDR(attr) ((attr)->u.addr)
1475 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1477 /* Blocks are a bunch of untyped bytes. */
1482 /* Valid only if SIZE is not zero. */
1483 const gdb_byte
*data
;
1486 #ifndef ATTR_ALLOC_CHUNK
1487 #define ATTR_ALLOC_CHUNK 4
1490 /* Allocate fields for structs, unions and enums in this size. */
1491 #ifndef DW_FIELD_ALLOC_CHUNK
1492 #define DW_FIELD_ALLOC_CHUNK 4
1495 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1496 but this would require a corresponding change in unpack_field_as_long
1498 static int bits_per_byte
= 8;
1502 struct nextfield
*next
;
1510 struct nextfnfield
*next
;
1511 struct fn_field fnfield
;
1518 struct nextfnfield
*head
;
1521 struct typedef_field_list
1523 struct typedef_field field
;
1524 struct typedef_field_list
*next
;
1527 /* The routines that read and process dies for a C struct or C++ class
1528 pass lists of data member fields and lists of member function fields
1529 in an instance of a field_info structure, as defined below. */
1532 /* List of data member and baseclasses fields. */
1533 struct nextfield
*fields
, *baseclasses
;
1535 /* Number of fields (including baseclasses). */
1538 /* Number of baseclasses. */
1541 /* Set if the accesibility of one of the fields is not public. */
1542 int non_public_fields
;
1544 /* Member function fieldlist array, contains name of possibly overloaded
1545 member function, number of overloaded member functions and a pointer
1546 to the head of the member function field chain. */
1547 struct fnfieldlist
*fnfieldlists
;
1549 /* Number of entries in the fnfieldlists array. */
1552 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1553 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1554 struct typedef_field_list
*typedef_field_list
;
1555 unsigned typedef_field_list_count
;
1558 /* One item on the queue of compilation units to read in full symbols
1560 struct dwarf2_queue_item
1562 struct dwarf2_per_cu_data
*per_cu
;
1563 enum language pretend_language
;
1564 struct dwarf2_queue_item
*next
;
1567 /* The current queue. */
1568 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1570 /* Loaded secondary compilation units are kept in memory until they
1571 have not been referenced for the processing of this many
1572 compilation units. Set this to zero to disable caching. Cache
1573 sizes of up to at least twenty will improve startup time for
1574 typical inter-CU-reference binaries, at an obvious memory cost. */
1575 static int dwarf_max_cache_age
= 5;
1577 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1578 struct cmd_list_element
*c
, const char *value
)
1580 fprintf_filtered (file
, _("The upper bound on the age of cached "
1581 "DWARF compilation units is %s.\n"),
1585 /* local function prototypes */
1587 static const char *get_section_name (const struct dwarf2_section_info
*);
1589 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1591 static void dwarf2_find_base_address (struct die_info
*die
,
1592 struct dwarf2_cu
*cu
);
1594 static struct partial_symtab
*create_partial_symtab
1595 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1597 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1598 const gdb_byte
*info_ptr
,
1599 struct die_info
*type_unit_die
,
1600 int has_children
, void *data
);
1602 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1604 static void scan_partial_symbols (struct partial_die_info
*,
1605 CORE_ADDR
*, CORE_ADDR
*,
1606 int, struct dwarf2_cu
*);
1608 static void add_partial_symbol (struct partial_die_info
*,
1609 struct dwarf2_cu
*);
1611 static void add_partial_namespace (struct partial_die_info
*pdi
,
1612 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1613 int set_addrmap
, struct dwarf2_cu
*cu
);
1615 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1616 CORE_ADDR
*highpc
, int set_addrmap
,
1617 struct dwarf2_cu
*cu
);
1619 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1620 struct dwarf2_cu
*cu
);
1622 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1623 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1624 int need_pc
, struct dwarf2_cu
*cu
);
1626 static void dwarf2_read_symtab (struct partial_symtab
*,
1629 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1631 static struct abbrev_info
*abbrev_table_lookup_abbrev
1632 (const struct abbrev_table
*, unsigned int);
1634 static struct abbrev_table
*abbrev_table_read_table
1635 (struct dwarf2_section_info
*, sect_offset
);
1637 static void abbrev_table_free (struct abbrev_table
*);
1639 static void abbrev_table_free_cleanup (void *);
1641 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1642 struct dwarf2_section_info
*);
1644 static void dwarf2_free_abbrev_table (void *);
1646 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1648 static struct partial_die_info
*load_partial_dies
1649 (const struct die_reader_specs
*, const gdb_byte
*, int);
1651 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1652 struct partial_die_info
*,
1653 struct abbrev_info
*,
1657 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1658 struct dwarf2_cu
*);
1660 static void fixup_partial_die (struct partial_die_info
*,
1661 struct dwarf2_cu
*);
1663 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1664 struct attribute
*, struct attr_abbrev
*,
1667 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1669 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1671 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1673 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1675 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1677 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1680 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1682 static LONGEST read_checked_initial_length_and_offset
1683 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1684 unsigned int *, unsigned int *);
1686 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1687 const struct comp_unit_head
*,
1690 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1692 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1695 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1697 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1699 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1700 const struct comp_unit_head
*,
1703 static const char *read_indirect_line_string (bfd
*, const gdb_byte
*,
1704 const struct comp_unit_head
*,
1707 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1709 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1711 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1715 static const char *read_str_index (const struct die_reader_specs
*reader
,
1716 ULONGEST str_index
);
1718 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1720 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1721 struct dwarf2_cu
*);
1723 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1726 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1727 struct dwarf2_cu
*cu
);
1729 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1730 struct dwarf2_cu
*cu
);
1732 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1734 static struct die_info
*die_specification (struct die_info
*die
,
1735 struct dwarf2_cu
**);
1737 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1738 struct dwarf2_cu
*cu
);
1740 static void dwarf_decode_lines (struct line_header
*, const char *,
1741 struct dwarf2_cu
*, struct partial_symtab
*,
1742 CORE_ADDR
, int decode_mapping
);
1744 static void dwarf2_start_subfile (const char *, const char *);
1746 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1747 const char *, const char *,
1750 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1751 struct dwarf2_cu
*);
1753 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1754 struct dwarf2_cu
*, struct symbol
*);
1756 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1757 struct dwarf2_cu
*);
1759 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1762 struct obstack
*obstack
,
1763 struct dwarf2_cu
*cu
, LONGEST
*value
,
1764 const gdb_byte
**bytes
,
1765 struct dwarf2_locexpr_baton
**baton
);
1767 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1769 static int need_gnat_info (struct dwarf2_cu
*);
1771 static struct type
*die_descriptive_type (struct die_info
*,
1772 struct dwarf2_cu
*);
1774 static void set_descriptive_type (struct type
*, struct die_info
*,
1775 struct dwarf2_cu
*);
1777 static struct type
*die_containing_type (struct die_info
*,
1778 struct dwarf2_cu
*);
1780 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1781 struct dwarf2_cu
*);
1783 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1785 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1787 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1789 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1790 const char *suffix
, int physname
,
1791 struct dwarf2_cu
*cu
);
1793 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1795 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1797 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1799 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1801 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1803 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1804 struct dwarf2_cu
*, struct partial_symtab
*);
1806 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1807 values. Keep the items ordered with increasing constraints compliance. */
1810 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1811 PC_BOUNDS_NOT_PRESENT
,
1813 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1814 were present but they do not form a valid range of PC addresses. */
1817 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1820 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1824 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1825 CORE_ADDR
*, CORE_ADDR
*,
1827 struct partial_symtab
*);
1829 static void get_scope_pc_bounds (struct die_info
*,
1830 CORE_ADDR
*, CORE_ADDR
*,
1831 struct dwarf2_cu
*);
1833 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1834 CORE_ADDR
, struct dwarf2_cu
*);
1836 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1837 struct dwarf2_cu
*);
1839 static void dwarf2_attach_fields_to_type (struct field_info
*,
1840 struct type
*, struct dwarf2_cu
*);
1842 static void dwarf2_add_member_fn (struct field_info
*,
1843 struct die_info
*, struct type
*,
1844 struct dwarf2_cu
*);
1846 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1848 struct dwarf2_cu
*);
1850 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1852 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1854 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1856 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1858 static struct using_direct
**using_directives (enum language
);
1860 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1862 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1864 static struct type
*read_module_type (struct die_info
*die
,
1865 struct dwarf2_cu
*cu
);
1867 static const char *namespace_name (struct die_info
*die
,
1868 int *is_anonymous
, struct dwarf2_cu
*);
1870 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1872 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1874 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1875 struct dwarf2_cu
*);
1877 static struct die_info
*read_die_and_siblings_1
1878 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1881 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1882 const gdb_byte
*info_ptr
,
1883 const gdb_byte
**new_info_ptr
,
1884 struct die_info
*parent
);
1886 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1887 struct die_info
**, const gdb_byte
*,
1890 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1891 struct die_info
**, const gdb_byte
*,
1894 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1896 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1899 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1901 static const char *dwarf2_full_name (const char *name
,
1902 struct die_info
*die
,
1903 struct dwarf2_cu
*cu
);
1905 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1906 struct dwarf2_cu
*cu
);
1908 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1909 struct dwarf2_cu
**);
1911 static const char *dwarf_tag_name (unsigned int);
1913 static const char *dwarf_attr_name (unsigned int);
1915 static const char *dwarf_form_name (unsigned int);
1917 static const char *dwarf_bool_name (unsigned int);
1919 static const char *dwarf_type_encoding_name (unsigned int);
1921 static struct die_info
*sibling_die (struct die_info
*);
1923 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1925 static void dump_die_for_error (struct die_info
*);
1927 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1930 /*static*/ void dump_die (struct die_info
*, int max_level
);
1932 static void store_in_ref_table (struct die_info
*,
1933 struct dwarf2_cu
*);
1935 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1937 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1939 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1940 const struct attribute
*,
1941 struct dwarf2_cu
**);
1943 static struct die_info
*follow_die_ref (struct die_info
*,
1944 const struct attribute
*,
1945 struct dwarf2_cu
**);
1947 static struct die_info
*follow_die_sig (struct die_info
*,
1948 const struct attribute
*,
1949 struct dwarf2_cu
**);
1951 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1952 struct dwarf2_cu
*);
1954 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1955 const struct attribute
*,
1956 struct dwarf2_cu
*);
1958 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1960 static void read_signatured_type (struct signatured_type
*);
1962 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1963 struct die_info
*die
, struct dwarf2_cu
*cu
,
1964 struct dynamic_prop
*prop
);
1966 /* memory allocation interface */
1968 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1970 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1972 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1974 static int attr_form_is_block (const struct attribute
*);
1976 static int attr_form_is_section_offset (const struct attribute
*);
1978 static int attr_form_is_constant (const struct attribute
*);
1980 static int attr_form_is_ref (const struct attribute
*);
1982 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1983 struct dwarf2_loclist_baton
*baton
,
1984 const struct attribute
*attr
);
1986 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1988 struct dwarf2_cu
*cu
,
1991 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1992 const gdb_byte
*info_ptr
,
1993 struct abbrev_info
*abbrev
);
1995 static void free_stack_comp_unit (void *);
1997 static hashval_t
partial_die_hash (const void *item
);
1999 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
2001 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
2002 (sect_offset sect_off
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
2004 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
2005 struct dwarf2_per_cu_data
*per_cu
);
2007 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
2008 struct die_info
*comp_unit_die
,
2009 enum language pretend_language
);
2011 static void free_heap_comp_unit (void *);
2013 static void free_cached_comp_units (void *);
2015 static void age_cached_comp_units (void);
2017 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
2019 static struct type
*set_die_type (struct die_info
*, struct type
*,
2020 struct dwarf2_cu
*);
2022 static void create_all_comp_units (struct objfile
*);
2024 static int create_all_type_units (struct objfile
*);
2026 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
2029 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
2032 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
2035 static void dwarf2_add_dependence (struct dwarf2_cu
*,
2036 struct dwarf2_per_cu_data
*);
2038 static void dwarf2_mark (struct dwarf2_cu
*);
2040 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
2042 static struct type
*get_die_type_at_offset (sect_offset
,
2043 struct dwarf2_per_cu_data
*);
2045 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
2047 static void dwarf2_release_queue (void *dummy
);
2049 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
2050 enum language pretend_language
);
2052 static void process_queue (void);
2054 /* The return type of find_file_and_directory. Note, the enclosed
2055 string pointers are only valid while this object is valid. */
2057 struct file_and_directory
2059 /* The filename. This is never NULL. */
2062 /* The compilation directory. NULL if not known. If we needed to
2063 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
2064 points directly to the DW_AT_comp_dir string attribute owned by
2065 the obstack that owns the DIE. */
2066 const char *comp_dir
;
2068 /* If we needed to build a new string for comp_dir, this is what
2069 owns the storage. */
2070 std::string comp_dir_storage
;
2073 static file_and_directory
find_file_and_directory (struct die_info
*die
,
2074 struct dwarf2_cu
*cu
);
2076 static char *file_full_name (int file
, struct line_header
*lh
,
2077 const char *comp_dir
);
2079 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
2080 enum class rcuh_kind
{ COMPILE
, TYPE
};
2082 static const gdb_byte
*read_and_check_comp_unit_head
2083 (struct comp_unit_head
*header
,
2084 struct dwarf2_section_info
*section
,
2085 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
2086 rcuh_kind section_kind
);
2088 static void init_cutu_and_read_dies
2089 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
2090 int use_existing_cu
, int keep
,
2091 die_reader_func_ftype
*die_reader_func
, void *data
);
2093 static void init_cutu_and_read_dies_simple
2094 (struct dwarf2_per_cu_data
*this_cu
,
2095 die_reader_func_ftype
*die_reader_func
, void *data
);
2097 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
2099 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
2101 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2102 (struct dwp_file
*dwp_file
, const char *comp_dir
,
2103 ULONGEST signature
, int is_debug_types
);
2105 static struct dwp_file
*get_dwp_file (void);
2107 static struct dwo_unit
*lookup_dwo_comp_unit
2108 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2110 static struct dwo_unit
*lookup_dwo_type_unit
2111 (struct signatured_type
*, const char *, const char *);
2113 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2115 static void free_dwo_file_cleanup (void *);
2117 static void process_cu_includes (void);
2119 static void check_producer (struct dwarf2_cu
*cu
);
2121 static void free_line_header_voidp (void *arg
);
2123 /* Various complaints about symbol reading that don't abort the process. */
2126 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2128 complaint (&symfile_complaints
,
2129 _("statement list doesn't fit in .debug_line section"));
2133 dwarf2_debug_line_missing_file_complaint (void)
2135 complaint (&symfile_complaints
,
2136 _(".debug_line section has line data without a file"));
2140 dwarf2_debug_line_missing_end_sequence_complaint (void)
2142 complaint (&symfile_complaints
,
2143 _(".debug_line section has line "
2144 "program sequence without an end"));
2148 dwarf2_complex_location_expr_complaint (void)
2150 complaint (&symfile_complaints
, _("location expression too complex"));
2154 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2157 complaint (&symfile_complaints
,
2158 _("const value length mismatch for '%s', got %d, expected %d"),
2163 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2165 complaint (&symfile_complaints
,
2166 _("debug info runs off end of %s section"
2168 get_section_name (section
),
2169 get_section_file_name (section
));
2173 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2175 complaint (&symfile_complaints
,
2176 _("macro debug info contains a "
2177 "malformed macro definition:\n`%s'"),
2182 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2184 complaint (&symfile_complaints
,
2185 _("invalid attribute class or form for '%s' in '%s'"),
2189 /* Hash function for line_header_hash. */
2192 line_header_hash (const struct line_header
*ofs
)
2194 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2197 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2200 line_header_hash_voidp (const void *item
)
2202 const struct line_header
*ofs
= (const struct line_header
*) item
;
2204 return line_header_hash (ofs
);
2207 /* Equality function for line_header_hash. */
2210 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2212 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2213 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2215 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2216 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2221 /* Read the given attribute value as an address, taking the attribute's
2222 form into account. */
2225 attr_value_as_address (struct attribute
*attr
)
2229 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2231 /* Aside from a few clearly defined exceptions, attributes that
2232 contain an address must always be in DW_FORM_addr form.
2233 Unfortunately, some compilers happen to be violating this
2234 requirement by encoding addresses using other forms, such
2235 as DW_FORM_data4 for example. For those broken compilers,
2236 we try to do our best, without any guarantee of success,
2237 to interpret the address correctly. It would also be nice
2238 to generate a complaint, but that would require us to maintain
2239 a list of legitimate cases where a non-address form is allowed,
2240 as well as update callers to pass in at least the CU's DWARF
2241 version. This is more overhead than what we're willing to
2242 expand for a pretty rare case. */
2243 addr
= DW_UNSND (attr
);
2246 addr
= DW_ADDR (attr
);
2251 /* The suffix for an index file. */
2252 #define INDEX_SUFFIX ".gdb-index"
2254 /* See declaration. */
2256 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2257 const dwarf2_debug_sections
*names
)
2258 : objfile (objfile_
)
2261 names
= &dwarf2_elf_names
;
2263 bfd
*obfd
= objfile
->obfd
;
2265 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2266 locate_sections (obfd
, sec
, *names
);
2269 dwarf2_per_objfile::~dwarf2_per_objfile ()
2271 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2272 free_cached_comp_units ();
2274 if (quick_file_names_table
)
2275 htab_delete (quick_file_names_table
);
2277 if (line_header_hash
)
2278 htab_delete (line_header_hash
);
2280 /* Everything else should be on the objfile obstack. */
2283 /* See declaration. */
2286 dwarf2_per_objfile::free_cached_comp_units ()
2288 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2289 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2290 while (per_cu
!= NULL
)
2292 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2294 free_heap_comp_unit (per_cu
->cu
);
2295 *last_chain
= next_cu
;
2300 /* Try to locate the sections we need for DWARF 2 debugging
2301 information and return true if we have enough to do something.
2302 NAMES points to the dwarf2 section names, or is NULL if the standard
2303 ELF names are used. */
2306 dwarf2_has_info (struct objfile
*objfile
,
2307 const struct dwarf2_debug_sections
*names
)
2309 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2310 objfile_data (objfile
, dwarf2_objfile_data_key
));
2311 if (!dwarf2_per_objfile
)
2313 /* Initialize per-objfile state. */
2314 struct dwarf2_per_objfile
*data
2315 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2317 dwarf2_per_objfile
= new (data
) struct dwarf2_per_objfile (objfile
, names
);
2318 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
2320 return (!dwarf2_per_objfile
->info
.is_virtual
2321 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2322 && !dwarf2_per_objfile
->abbrev
.is_virtual
2323 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2326 /* Return the containing section of virtual section SECTION. */
2328 static struct dwarf2_section_info
*
2329 get_containing_section (const struct dwarf2_section_info
*section
)
2331 gdb_assert (section
->is_virtual
);
2332 return section
->s
.containing_section
;
2335 /* Return the bfd owner of SECTION. */
2338 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2340 if (section
->is_virtual
)
2342 section
= get_containing_section (section
);
2343 gdb_assert (!section
->is_virtual
);
2345 return section
->s
.section
->owner
;
2348 /* Return the bfd section of SECTION.
2349 Returns NULL if the section is not present. */
2352 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2354 if (section
->is_virtual
)
2356 section
= get_containing_section (section
);
2357 gdb_assert (!section
->is_virtual
);
2359 return section
->s
.section
;
2362 /* Return the name of SECTION. */
2365 get_section_name (const struct dwarf2_section_info
*section
)
2367 asection
*sectp
= get_section_bfd_section (section
);
2369 gdb_assert (sectp
!= NULL
);
2370 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2373 /* Return the name of the file SECTION is in. */
2376 get_section_file_name (const struct dwarf2_section_info
*section
)
2378 bfd
*abfd
= get_section_bfd_owner (section
);
2380 return bfd_get_filename (abfd
);
2383 /* Return the id of SECTION.
2384 Returns 0 if SECTION doesn't exist. */
2387 get_section_id (const struct dwarf2_section_info
*section
)
2389 asection
*sectp
= get_section_bfd_section (section
);
2396 /* Return the flags of SECTION.
2397 SECTION (or containing section if this is a virtual section) must exist. */
2400 get_section_flags (const struct dwarf2_section_info
*section
)
2402 asection
*sectp
= get_section_bfd_section (section
);
2404 gdb_assert (sectp
!= NULL
);
2405 return bfd_get_section_flags (sectp
->owner
, sectp
);
2408 /* When loading sections, we look either for uncompressed section or for
2409 compressed section names. */
2412 section_is_p (const char *section_name
,
2413 const struct dwarf2_section_names
*names
)
2415 if (names
->normal
!= NULL
2416 && strcmp (section_name
, names
->normal
) == 0)
2418 if (names
->compressed
!= NULL
2419 && strcmp (section_name
, names
->compressed
) == 0)
2424 /* See declaration. */
2427 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2428 const dwarf2_debug_sections
&names
)
2430 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2432 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2435 else if (section_is_p (sectp
->name
, &names
.info
))
2437 this->info
.s
.section
= sectp
;
2438 this->info
.size
= bfd_get_section_size (sectp
);
2440 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2442 this->abbrev
.s
.section
= sectp
;
2443 this->abbrev
.size
= bfd_get_section_size (sectp
);
2445 else if (section_is_p (sectp
->name
, &names
.line
))
2447 this->line
.s
.section
= sectp
;
2448 this->line
.size
= bfd_get_section_size (sectp
);
2450 else if (section_is_p (sectp
->name
, &names
.loc
))
2452 this->loc
.s
.section
= sectp
;
2453 this->loc
.size
= bfd_get_section_size (sectp
);
2455 else if (section_is_p (sectp
->name
, &names
.loclists
))
2457 this->loclists
.s
.section
= sectp
;
2458 this->loclists
.size
= bfd_get_section_size (sectp
);
2460 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2462 this->macinfo
.s
.section
= sectp
;
2463 this->macinfo
.size
= bfd_get_section_size (sectp
);
2465 else if (section_is_p (sectp
->name
, &names
.macro
))
2467 this->macro
.s
.section
= sectp
;
2468 this->macro
.size
= bfd_get_section_size (sectp
);
2470 else if (section_is_p (sectp
->name
, &names
.str
))
2472 this->str
.s
.section
= sectp
;
2473 this->str
.size
= bfd_get_section_size (sectp
);
2475 else if (section_is_p (sectp
->name
, &names
.line_str
))
2477 this->line_str
.s
.section
= sectp
;
2478 this->line_str
.size
= bfd_get_section_size (sectp
);
2480 else if (section_is_p (sectp
->name
, &names
.addr
))
2482 this->addr
.s
.section
= sectp
;
2483 this->addr
.size
= bfd_get_section_size (sectp
);
2485 else if (section_is_p (sectp
->name
, &names
.frame
))
2487 this->frame
.s
.section
= sectp
;
2488 this->frame
.size
= bfd_get_section_size (sectp
);
2490 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2492 this->eh_frame
.s
.section
= sectp
;
2493 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2495 else if (section_is_p (sectp
->name
, &names
.ranges
))
2497 this->ranges
.s
.section
= sectp
;
2498 this->ranges
.size
= bfd_get_section_size (sectp
);
2500 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2502 this->rnglists
.s
.section
= sectp
;
2503 this->rnglists
.size
= bfd_get_section_size (sectp
);
2505 else if (section_is_p (sectp
->name
, &names
.types
))
2507 struct dwarf2_section_info type_section
;
2509 memset (&type_section
, 0, sizeof (type_section
));
2510 type_section
.s
.section
= sectp
;
2511 type_section
.size
= bfd_get_section_size (sectp
);
2513 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2516 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2518 this->gdb_index
.s
.section
= sectp
;
2519 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2522 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2523 && bfd_section_vma (abfd
, sectp
) == 0)
2524 this->has_section_at_zero
= true;
2527 /* A helper function that decides whether a section is empty,
2531 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2533 if (section
->is_virtual
)
2534 return section
->size
== 0;
2535 return section
->s
.section
== NULL
|| section
->size
== 0;
2538 /* Read the contents of the section INFO.
2539 OBJFILE is the main object file, but not necessarily the file where
2540 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2542 If the section is compressed, uncompress it before returning. */
2545 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2549 gdb_byte
*buf
, *retbuf
;
2553 info
->buffer
= NULL
;
2556 if (dwarf2_section_empty_p (info
))
2559 sectp
= get_section_bfd_section (info
);
2561 /* If this is a virtual section we need to read in the real one first. */
2562 if (info
->is_virtual
)
2564 struct dwarf2_section_info
*containing_section
=
2565 get_containing_section (info
);
2567 gdb_assert (sectp
!= NULL
);
2568 if ((sectp
->flags
& SEC_RELOC
) != 0)
2570 error (_("Dwarf Error: DWP format V2 with relocations is not"
2571 " supported in section %s [in module %s]"),
2572 get_section_name (info
), get_section_file_name (info
));
2574 dwarf2_read_section (objfile
, containing_section
);
2575 /* Other code should have already caught virtual sections that don't
2577 gdb_assert (info
->virtual_offset
+ info
->size
2578 <= containing_section
->size
);
2579 /* If the real section is empty or there was a problem reading the
2580 section we shouldn't get here. */
2581 gdb_assert (containing_section
->buffer
!= NULL
);
2582 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2586 /* If the section has relocations, we must read it ourselves.
2587 Otherwise we attach it to the BFD. */
2588 if ((sectp
->flags
& SEC_RELOC
) == 0)
2590 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2594 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2597 /* When debugging .o files, we may need to apply relocations; see
2598 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2599 We never compress sections in .o files, so we only need to
2600 try this when the section is not compressed. */
2601 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2604 info
->buffer
= retbuf
;
2608 abfd
= get_section_bfd_owner (info
);
2609 gdb_assert (abfd
!= NULL
);
2611 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2612 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2614 error (_("Dwarf Error: Can't read DWARF data"
2615 " in section %s [in module %s]"),
2616 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2620 /* A helper function that returns the size of a section in a safe way.
2621 If you are positive that the section has been read before using the
2622 size, then it is safe to refer to the dwarf2_section_info object's
2623 "size" field directly. In other cases, you must call this
2624 function, because for compressed sections the size field is not set
2625 correctly until the section has been read. */
2627 static bfd_size_type
2628 dwarf2_section_size (struct objfile
*objfile
,
2629 struct dwarf2_section_info
*info
)
2632 dwarf2_read_section (objfile
, info
);
2636 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2640 dwarf2_get_section_info (struct objfile
*objfile
,
2641 enum dwarf2_section_enum sect
,
2642 asection
**sectp
, const gdb_byte
**bufp
,
2643 bfd_size_type
*sizep
)
2645 struct dwarf2_per_objfile
*data
2646 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2647 dwarf2_objfile_data_key
);
2648 struct dwarf2_section_info
*info
;
2650 /* We may see an objfile without any DWARF, in which case we just
2661 case DWARF2_DEBUG_FRAME
:
2662 info
= &data
->frame
;
2664 case DWARF2_EH_FRAME
:
2665 info
= &data
->eh_frame
;
2668 gdb_assert_not_reached ("unexpected section");
2671 dwarf2_read_section (objfile
, info
);
2673 *sectp
= get_section_bfd_section (info
);
2674 *bufp
= info
->buffer
;
2675 *sizep
= info
->size
;
2678 /* A helper function to find the sections for a .dwz file. */
2681 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2683 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2685 /* Note that we only support the standard ELF names, because .dwz
2686 is ELF-only (at the time of writing). */
2687 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2689 dwz_file
->abbrev
.s
.section
= sectp
;
2690 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2692 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2694 dwz_file
->info
.s
.section
= sectp
;
2695 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2697 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2699 dwz_file
->str
.s
.section
= sectp
;
2700 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2702 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2704 dwz_file
->line
.s
.section
= sectp
;
2705 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2707 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2709 dwz_file
->macro
.s
.section
= sectp
;
2710 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2712 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2714 dwz_file
->gdb_index
.s
.section
= sectp
;
2715 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2719 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2720 there is no .gnu_debugaltlink section in the file. Error if there
2721 is such a section but the file cannot be found. */
2723 static struct dwz_file
*
2724 dwarf2_get_dwz_file (void)
2726 const char *filename
;
2727 struct dwz_file
*result
;
2728 bfd_size_type buildid_len_arg
;
2732 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2733 return dwarf2_per_objfile
->dwz_file
;
2735 bfd_set_error (bfd_error_no_error
);
2736 gdb::unique_xmalloc_ptr
<char> data
2737 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2738 &buildid_len_arg
, &buildid
));
2741 if (bfd_get_error () == bfd_error_no_error
)
2743 error (_("could not read '.gnu_debugaltlink' section: %s"),
2744 bfd_errmsg (bfd_get_error ()));
2747 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2749 buildid_len
= (size_t) buildid_len_arg
;
2751 filename
= data
.get ();
2753 std::string abs_storage
;
2754 if (!IS_ABSOLUTE_PATH (filename
))
2756 gdb::unique_xmalloc_ptr
<char> abs
2757 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2759 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2760 filename
= abs_storage
.c_str ();
2763 /* First try the file name given in the section. If that doesn't
2764 work, try to use the build-id instead. */
2765 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2766 if (dwz_bfd
!= NULL
)
2768 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2772 if (dwz_bfd
== NULL
)
2773 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2775 if (dwz_bfd
== NULL
)
2776 error (_("could not find '.gnu_debugaltlink' file for %s"),
2777 objfile_name (dwarf2_per_objfile
->objfile
));
2779 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2781 result
->dwz_bfd
= dwz_bfd
.release ();
2783 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2785 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2786 dwarf2_per_objfile
->dwz_file
= result
;
2790 /* DWARF quick_symbols_functions support. */
2792 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2793 unique line tables, so we maintain a separate table of all .debug_line
2794 derived entries to support the sharing.
2795 All the quick functions need is the list of file names. We discard the
2796 line_header when we're done and don't need to record it here. */
2797 struct quick_file_names
2799 /* The data used to construct the hash key. */
2800 struct stmt_list_hash hash
;
2802 /* The number of entries in file_names, real_names. */
2803 unsigned int num_file_names
;
2805 /* The file names from the line table, after being run through
2807 const char **file_names
;
2809 /* The file names from the line table after being run through
2810 gdb_realpath. These are computed lazily. */
2811 const char **real_names
;
2814 /* When using the index (and thus not using psymtabs), each CU has an
2815 object of this type. This is used to hold information needed by
2816 the various "quick" methods. */
2817 struct dwarf2_per_cu_quick_data
2819 /* The file table. This can be NULL if there was no file table
2820 or it's currently not read in.
2821 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2822 struct quick_file_names
*file_names
;
2824 /* The corresponding symbol table. This is NULL if symbols for this
2825 CU have not yet been read. */
2826 struct compunit_symtab
*compunit_symtab
;
2828 /* A temporary mark bit used when iterating over all CUs in
2829 expand_symtabs_matching. */
2830 unsigned int mark
: 1;
2832 /* True if we've tried to read the file table and found there isn't one.
2833 There will be no point in trying to read it again next time. */
2834 unsigned int no_file_data
: 1;
2837 /* Utility hash function for a stmt_list_hash. */
2840 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2844 if (stmt_list_hash
->dwo_unit
!= NULL
)
2845 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2846 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2850 /* Utility equality function for a stmt_list_hash. */
2853 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2854 const struct stmt_list_hash
*rhs
)
2856 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2858 if (lhs
->dwo_unit
!= NULL
2859 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2862 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2865 /* Hash function for a quick_file_names. */
2868 hash_file_name_entry (const void *e
)
2870 const struct quick_file_names
*file_data
2871 = (const struct quick_file_names
*) e
;
2873 return hash_stmt_list_entry (&file_data
->hash
);
2876 /* Equality function for a quick_file_names. */
2879 eq_file_name_entry (const void *a
, const void *b
)
2881 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2882 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2884 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2887 /* Delete function for a quick_file_names. */
2890 delete_file_name_entry (void *e
)
2892 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2895 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2897 xfree ((void*) file_data
->file_names
[i
]);
2898 if (file_data
->real_names
)
2899 xfree ((void*) file_data
->real_names
[i
]);
2902 /* The space for the struct itself lives on objfile_obstack,
2903 so we don't free it here. */
2906 /* Create a quick_file_names hash table. */
2909 create_quick_file_names_table (unsigned int nr_initial_entries
)
2911 return htab_create_alloc (nr_initial_entries
,
2912 hash_file_name_entry
, eq_file_name_entry
,
2913 delete_file_name_entry
, xcalloc
, xfree
);
2916 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2917 have to be created afterwards. You should call age_cached_comp_units after
2918 processing PER_CU->CU. dw2_setup must have been already called. */
2921 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2923 if (per_cu
->is_debug_types
)
2924 load_full_type_unit (per_cu
);
2926 load_full_comp_unit (per_cu
, language_minimal
);
2928 if (per_cu
->cu
== NULL
)
2929 return; /* Dummy CU. */
2931 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2934 /* Read in the symbols for PER_CU. */
2937 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2939 struct cleanup
*back_to
;
2941 /* Skip type_unit_groups, reading the type units they contain
2942 is handled elsewhere. */
2943 if (IS_TYPE_UNIT_GROUP (per_cu
))
2946 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2948 if (dwarf2_per_objfile
->using_index
2949 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2950 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2952 queue_comp_unit (per_cu
, language_minimal
);
2955 /* If we just loaded a CU from a DWO, and we're working with an index
2956 that may badly handle TUs, load all the TUs in that DWO as well.
2957 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2958 if (!per_cu
->is_debug_types
2959 && per_cu
->cu
!= NULL
2960 && per_cu
->cu
->dwo_unit
!= NULL
2961 && dwarf2_per_objfile
->index_table
!= NULL
2962 && dwarf2_per_objfile
->index_table
->version
<= 7
2963 /* DWP files aren't supported yet. */
2964 && get_dwp_file () == NULL
)
2965 queue_and_load_all_dwo_tus (per_cu
);
2970 /* Age the cache, releasing compilation units that have not
2971 been used recently. */
2972 age_cached_comp_units ();
2974 do_cleanups (back_to
);
2977 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2978 the objfile from which this CU came. Returns the resulting symbol
2981 static struct compunit_symtab
*
2982 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2984 gdb_assert (dwarf2_per_objfile
->using_index
);
2985 if (!per_cu
->v
.quick
->compunit_symtab
)
2987 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2988 scoped_restore decrementer
= increment_reading_symtab ();
2989 dw2_do_instantiate_symtab (per_cu
);
2990 process_cu_includes ();
2991 do_cleanups (back_to
);
2994 return per_cu
->v
.quick
->compunit_symtab
;
2997 /* Return the CU/TU given its index.
2999 This is intended for loops like:
3001 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
3002 + dwarf2_per_objfile->n_type_units); ++i)
3004 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
3010 static struct dwarf2_per_cu_data
*
3011 dw2_get_cutu (int index
)
3013 if (index
>= dwarf2_per_objfile
->n_comp_units
)
3015 index
-= dwarf2_per_objfile
->n_comp_units
;
3016 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
3017 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
3020 return dwarf2_per_objfile
->all_comp_units
[index
];
3023 /* Return the CU given its index.
3024 This differs from dw2_get_cutu in that it's for when you know INDEX
3027 static struct dwarf2_per_cu_data
*
3028 dw2_get_cu (int index
)
3030 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
3032 return dwarf2_per_objfile
->all_comp_units
[index
];
3035 /* A helper for create_cus_from_index that handles a given list of
3039 create_cus_from_index_list (struct objfile
*objfile
,
3040 const gdb_byte
*cu_list
, offset_type n_elements
,
3041 struct dwarf2_section_info
*section
,
3047 for (i
= 0; i
< n_elements
; i
+= 2)
3049 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3051 sect_offset sect_off
3052 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3053 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3056 dwarf2_per_cu_data
*the_cu
3057 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3058 struct dwarf2_per_cu_data
);
3059 the_cu
->sect_off
= sect_off
;
3060 the_cu
->length
= length
;
3061 the_cu
->objfile
= objfile
;
3062 the_cu
->section
= section
;
3063 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3064 struct dwarf2_per_cu_quick_data
);
3065 the_cu
->is_dwz
= is_dwz
;
3066 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
3070 /* Read the CU list from the mapped index, and use it to create all
3071 the CU objects for this objfile. */
3074 create_cus_from_index (struct objfile
*objfile
,
3075 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3076 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3078 struct dwz_file
*dwz
;
3080 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3081 dwarf2_per_objfile
->all_comp_units
=
3082 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3083 dwarf2_per_objfile
->n_comp_units
);
3085 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3086 &dwarf2_per_objfile
->info
, 0, 0);
3088 if (dwz_elements
== 0)
3091 dwz
= dwarf2_get_dwz_file ();
3092 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3093 cu_list_elements
/ 2);
3096 /* Create the signatured type hash table from the index. */
3099 create_signatured_type_table_from_index (struct objfile
*objfile
,
3100 struct dwarf2_section_info
*section
,
3101 const gdb_byte
*bytes
,
3102 offset_type elements
)
3105 htab_t sig_types_hash
;
3107 dwarf2_per_objfile
->n_type_units
3108 = dwarf2_per_objfile
->n_allocated_type_units
3110 dwarf2_per_objfile
->all_type_units
=
3111 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3113 sig_types_hash
= allocate_signatured_type_table (objfile
);
3115 for (i
= 0; i
< elements
; i
+= 3)
3117 struct signatured_type
*sig_type
;
3120 cu_offset type_offset_in_tu
;
3122 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3123 sect_offset sect_off
3124 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3126 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3128 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3131 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3132 struct signatured_type
);
3133 sig_type
->signature
= signature
;
3134 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3135 sig_type
->per_cu
.is_debug_types
= 1;
3136 sig_type
->per_cu
.section
= section
;
3137 sig_type
->per_cu
.sect_off
= sect_off
;
3138 sig_type
->per_cu
.objfile
= objfile
;
3139 sig_type
->per_cu
.v
.quick
3140 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3141 struct dwarf2_per_cu_quick_data
);
3143 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3146 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3149 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3152 /* Read the address map data from the mapped index, and use it to
3153 populate the objfile's psymtabs_addrmap. */
3156 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
3158 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3159 const gdb_byte
*iter
, *end
;
3160 struct addrmap
*mutable_map
;
3163 auto_obstack temp_obstack
;
3165 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3167 iter
= index
->address_table
;
3168 end
= iter
+ index
->address_table_size
;
3170 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3174 ULONGEST hi
, lo
, cu_index
;
3175 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3177 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3179 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3184 complaint (&symfile_complaints
,
3185 _(".gdb_index address table has invalid range (%s - %s)"),
3186 hex_string (lo
), hex_string (hi
));
3190 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3192 complaint (&symfile_complaints
,
3193 _(".gdb_index address table has invalid CU number %u"),
3194 (unsigned) cu_index
);
3198 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3199 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3200 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
3203 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3204 &objfile
->objfile_obstack
);
3207 /* The hash function for strings in the mapped index. This is the same as
3208 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3209 implementation. This is necessary because the hash function is tied to the
3210 format of the mapped index file. The hash values do not have to match with
3213 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3216 mapped_index_string_hash (int index_version
, const void *p
)
3218 const unsigned char *str
= (const unsigned char *) p
;
3222 while ((c
= *str
++) != 0)
3224 if (index_version
>= 5)
3226 r
= r
* 67 + c
- 113;
3232 /* Find a slot in the mapped index INDEX for the object named NAME.
3233 If NAME is found, set *VEC_OUT to point to the CU vector in the
3234 constant pool and return true. If NAME cannot be found, return
3238 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3239 offset_type
**vec_out
)
3242 offset_type slot
, step
;
3243 int (*cmp
) (const char *, const char *);
3245 gdb::unique_xmalloc_ptr
<char> without_params
;
3246 if (current_language
->la_language
== language_cplus
3247 || current_language
->la_language
== language_fortran
3248 || current_language
->la_language
== language_d
)
3250 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3253 if (strchr (name
, '(') != NULL
)
3255 without_params
= cp_remove_params (name
);
3257 if (without_params
!= NULL
)
3258 name
= without_params
.get ();
3262 /* Index version 4 did not support case insensitive searches. But the
3263 indices for case insensitive languages are built in lowercase, therefore
3264 simulate our NAME being searched is also lowercased. */
3265 hash
= mapped_index_string_hash ((index
->version
== 4
3266 && case_sensitivity
== case_sensitive_off
3267 ? 5 : index
->version
),
3270 slot
= hash
& (index
->symbol_table_slots
- 1);
3271 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3272 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3276 /* Convert a slot number to an offset into the table. */
3277 offset_type i
= 2 * slot
;
3279 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3282 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3283 if (!cmp (name
, str
))
3285 *vec_out
= (offset_type
*) (index
->constant_pool
3286 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3290 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3294 /* A helper function that reads the .gdb_index from SECTION and fills
3295 in MAP. FILENAME is the name of the file containing the section;
3296 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3297 ok to use deprecated sections.
3299 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3300 out parameters that are filled in with information about the CU and
3301 TU lists in the section.
3303 Returns 1 if all went well, 0 otherwise. */
3306 read_index_from_section (struct objfile
*objfile
,
3307 const char *filename
,
3309 struct dwarf2_section_info
*section
,
3310 struct mapped_index
*map
,
3311 const gdb_byte
**cu_list
,
3312 offset_type
*cu_list_elements
,
3313 const gdb_byte
**types_list
,
3314 offset_type
*types_list_elements
)
3316 const gdb_byte
*addr
;
3317 offset_type version
;
3318 offset_type
*metadata
;
3321 if (dwarf2_section_empty_p (section
))
3324 /* Older elfutils strip versions could keep the section in the main
3325 executable while splitting it for the separate debug info file. */
3326 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3329 dwarf2_read_section (objfile
, section
);
3331 addr
= section
->buffer
;
3332 /* Version check. */
3333 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3334 /* Versions earlier than 3 emitted every copy of a psymbol. This
3335 causes the index to behave very poorly for certain requests. Version 3
3336 contained incomplete addrmap. So, it seems better to just ignore such
3340 static int warning_printed
= 0;
3341 if (!warning_printed
)
3343 warning (_("Skipping obsolete .gdb_index section in %s."),
3345 warning_printed
= 1;
3349 /* Index version 4 uses a different hash function than index version
3352 Versions earlier than 6 did not emit psymbols for inlined
3353 functions. Using these files will cause GDB not to be able to
3354 set breakpoints on inlined functions by name, so we ignore these
3355 indices unless the user has done
3356 "set use-deprecated-index-sections on". */
3357 if (version
< 6 && !deprecated_ok
)
3359 static int warning_printed
= 0;
3360 if (!warning_printed
)
3363 Skipping deprecated .gdb_index section in %s.\n\
3364 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3365 to use the section anyway."),
3367 warning_printed
= 1;
3371 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3372 of the TU (for symbols coming from TUs),
3373 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3374 Plus gold-generated indices can have duplicate entries for global symbols,
3375 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3376 These are just performance bugs, and we can't distinguish gdb-generated
3377 indices from gold-generated ones, so issue no warning here. */
3379 /* Indexes with higher version than the one supported by GDB may be no
3380 longer backward compatible. */
3384 map
->version
= version
;
3385 map
->total_size
= section
->size
;
3387 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3390 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3391 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3395 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3396 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3397 - MAYBE_SWAP (metadata
[i
]))
3401 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3402 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3403 - MAYBE_SWAP (metadata
[i
]));
3406 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3407 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3408 - MAYBE_SWAP (metadata
[i
]))
3409 / (2 * sizeof (offset_type
)));
3412 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3418 /* Read the index file. If everything went ok, initialize the "quick"
3419 elements of all the CUs and return 1. Otherwise, return 0. */
3422 dwarf2_read_index (struct objfile
*objfile
)
3424 struct mapped_index local_map
, *map
;
3425 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3426 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3427 struct dwz_file
*dwz
;
3429 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3430 use_deprecated_index_sections
,
3431 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3432 &cu_list
, &cu_list_elements
,
3433 &types_list
, &types_list_elements
))
3436 /* Don't use the index if it's empty. */
3437 if (local_map
.symbol_table_slots
== 0)
3440 /* If there is a .dwz file, read it so we can get its CU list as
3442 dwz
= dwarf2_get_dwz_file ();
3445 struct mapped_index dwz_map
;
3446 const gdb_byte
*dwz_types_ignore
;
3447 offset_type dwz_types_elements_ignore
;
3449 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3451 &dwz
->gdb_index
, &dwz_map
,
3452 &dwz_list
, &dwz_list_elements
,
3454 &dwz_types_elements_ignore
))
3456 warning (_("could not read '.gdb_index' section from %s; skipping"),
3457 bfd_get_filename (dwz
->dwz_bfd
));
3462 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3465 if (types_list_elements
)
3467 struct dwarf2_section_info
*section
;
3469 /* We can only handle a single .debug_types when we have an
3471 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3474 section
= VEC_index (dwarf2_section_info_def
,
3475 dwarf2_per_objfile
->types
, 0);
3477 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3478 types_list_elements
);
3481 create_addrmap_from_index (objfile
, &local_map
);
3483 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3484 map
= new (map
) mapped_index ();
3487 dwarf2_per_objfile
->index_table
= map
;
3488 dwarf2_per_objfile
->using_index
= 1;
3489 dwarf2_per_objfile
->quick_file_names_table
=
3490 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3495 /* A helper for the "quick" functions which sets the global
3496 dwarf2_per_objfile according to OBJFILE. */
3499 dw2_setup (struct objfile
*objfile
)
3501 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3502 objfile_data (objfile
, dwarf2_objfile_data_key
));
3503 gdb_assert (dwarf2_per_objfile
);
3506 /* die_reader_func for dw2_get_file_names. */
3509 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3510 const gdb_byte
*info_ptr
,
3511 struct die_info
*comp_unit_die
,
3515 struct dwarf2_cu
*cu
= reader
->cu
;
3516 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3517 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3518 struct dwarf2_per_cu_data
*lh_cu
;
3519 struct attribute
*attr
;
3522 struct quick_file_names
*qfn
;
3524 gdb_assert (! this_cu
->is_debug_types
);
3526 /* Our callers never want to match partial units -- instead they
3527 will match the enclosing full CU. */
3528 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3530 this_cu
->v
.quick
->no_file_data
= 1;
3538 sect_offset line_offset
{};
3540 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3543 struct quick_file_names find_entry
;
3545 line_offset
= (sect_offset
) DW_UNSND (attr
);
3547 /* We may have already read in this line header (TU line header sharing).
3548 If we have we're done. */
3549 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3550 find_entry
.hash
.line_sect_off
= line_offset
;
3551 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3552 &find_entry
, INSERT
);
3555 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3559 lh
= dwarf_decode_line_header (line_offset
, cu
);
3563 lh_cu
->v
.quick
->no_file_data
= 1;
3567 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3568 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3569 qfn
->hash
.line_sect_off
= line_offset
;
3570 gdb_assert (slot
!= NULL
);
3573 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3575 qfn
->num_file_names
= lh
->file_names
.size ();
3577 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3578 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3579 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3580 qfn
->real_names
= NULL
;
3582 lh_cu
->v
.quick
->file_names
= qfn
;
3585 /* A helper for the "quick" functions which attempts to read the line
3586 table for THIS_CU. */
3588 static struct quick_file_names
*
3589 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3591 /* This should never be called for TUs. */
3592 gdb_assert (! this_cu
->is_debug_types
);
3593 /* Nor type unit groups. */
3594 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3596 if (this_cu
->v
.quick
->file_names
!= NULL
)
3597 return this_cu
->v
.quick
->file_names
;
3598 /* If we know there is no line data, no point in looking again. */
3599 if (this_cu
->v
.quick
->no_file_data
)
3602 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3604 if (this_cu
->v
.quick
->no_file_data
)
3606 return this_cu
->v
.quick
->file_names
;
3609 /* A helper for the "quick" functions which computes and caches the
3610 real path for a given file name from the line table. */
3613 dw2_get_real_path (struct objfile
*objfile
,
3614 struct quick_file_names
*qfn
, int index
)
3616 if (qfn
->real_names
== NULL
)
3617 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3618 qfn
->num_file_names
, const char *);
3620 if (qfn
->real_names
[index
] == NULL
)
3621 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3623 return qfn
->real_names
[index
];
3626 static struct symtab
*
3627 dw2_find_last_source_symtab (struct objfile
*objfile
)
3629 struct compunit_symtab
*cust
;
3632 dw2_setup (objfile
);
3633 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3634 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3637 return compunit_primary_filetab (cust
);
3640 /* Traversal function for dw2_forget_cached_source_info. */
3643 dw2_free_cached_file_names (void **slot
, void *info
)
3645 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3647 if (file_data
->real_names
)
3651 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3653 xfree ((void*) file_data
->real_names
[i
]);
3654 file_data
->real_names
[i
] = NULL
;
3662 dw2_forget_cached_source_info (struct objfile
*objfile
)
3664 dw2_setup (objfile
);
3666 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3667 dw2_free_cached_file_names
, NULL
);
3670 /* Helper function for dw2_map_symtabs_matching_filename that expands
3671 the symtabs and calls the iterator. */
3674 dw2_map_expand_apply (struct objfile
*objfile
,
3675 struct dwarf2_per_cu_data
*per_cu
,
3676 const char *name
, const char *real_path
,
3677 gdb::function_view
<bool (symtab
*)> callback
)
3679 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3681 /* Don't visit already-expanded CUs. */
3682 if (per_cu
->v
.quick
->compunit_symtab
)
3685 /* This may expand more than one symtab, and we want to iterate over
3687 dw2_instantiate_symtab (per_cu
);
3689 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3690 last_made
, callback
);
3693 /* Implementation of the map_symtabs_matching_filename method. */
3696 dw2_map_symtabs_matching_filename
3697 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3698 gdb::function_view
<bool (symtab
*)> callback
)
3701 const char *name_basename
= lbasename (name
);
3703 dw2_setup (objfile
);
3705 /* The rule is CUs specify all the files, including those used by
3706 any TU, so there's no need to scan TUs here. */
3708 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3711 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3712 struct quick_file_names
*file_data
;
3714 /* We only need to look at symtabs not already expanded. */
3715 if (per_cu
->v
.quick
->compunit_symtab
)
3718 file_data
= dw2_get_file_names (per_cu
);
3719 if (file_data
== NULL
)
3722 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3724 const char *this_name
= file_data
->file_names
[j
];
3725 const char *this_real_name
;
3727 if (compare_filenames_for_search (this_name
, name
))
3729 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3735 /* Before we invoke realpath, which can get expensive when many
3736 files are involved, do a quick comparison of the basenames. */
3737 if (! basenames_may_differ
3738 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3741 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3742 if (compare_filenames_for_search (this_real_name
, name
))
3744 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3750 if (real_path
!= NULL
)
3752 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3753 gdb_assert (IS_ABSOLUTE_PATH (name
));
3754 if (this_real_name
!= NULL
3755 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3757 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3769 /* Struct used to manage iterating over all CUs looking for a symbol. */
3771 struct dw2_symtab_iterator
3773 /* The internalized form of .gdb_index. */
3774 struct mapped_index
*index
;
3775 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3776 int want_specific_block
;
3777 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3778 Unused if !WANT_SPECIFIC_BLOCK. */
3780 /* The kind of symbol we're looking for. */
3782 /* The list of CUs from the index entry of the symbol,
3783 or NULL if not found. */
3785 /* The next element in VEC to look at. */
3787 /* The number of elements in VEC, or zero if there is no match. */
3789 /* Have we seen a global version of the symbol?
3790 If so we can ignore all further global instances.
3791 This is to work around gold/15646, inefficient gold-generated
3796 /* Initialize the index symtab iterator ITER.
3797 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3798 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3801 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3802 struct mapped_index
*index
,
3803 int want_specific_block
,
3808 iter
->index
= index
;
3809 iter
->want_specific_block
= want_specific_block
;
3810 iter
->block_index
= block_index
;
3811 iter
->domain
= domain
;
3813 iter
->global_seen
= 0;
3815 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3816 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3824 /* Return the next matching CU or NULL if there are no more. */
3826 static struct dwarf2_per_cu_data
*
3827 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3829 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3831 offset_type cu_index_and_attrs
=
3832 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3833 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3834 struct dwarf2_per_cu_data
*per_cu
;
3835 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3836 /* This value is only valid for index versions >= 7. */
3837 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3838 gdb_index_symbol_kind symbol_kind
=
3839 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3840 /* Only check the symbol attributes if they're present.
3841 Indices prior to version 7 don't record them,
3842 and indices >= 7 may elide them for certain symbols
3843 (gold does this). */
3845 (iter
->index
->version
>= 7
3846 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3848 /* Don't crash on bad data. */
3849 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3850 + dwarf2_per_objfile
->n_type_units
))
3852 complaint (&symfile_complaints
,
3853 _(".gdb_index entry has bad CU index"
3855 objfile_name (dwarf2_per_objfile
->objfile
));
3859 per_cu
= dw2_get_cutu (cu_index
);
3861 /* Skip if already read in. */
3862 if (per_cu
->v
.quick
->compunit_symtab
)
3865 /* Check static vs global. */
3868 if (iter
->want_specific_block
3869 && want_static
!= is_static
)
3871 /* Work around gold/15646. */
3872 if (!is_static
&& iter
->global_seen
)
3875 iter
->global_seen
= 1;
3878 /* Only check the symbol's kind if it has one. */
3881 switch (iter
->domain
)
3884 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3885 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3886 /* Some types are also in VAR_DOMAIN. */
3887 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3891 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3895 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3910 static struct compunit_symtab
*
3911 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3912 const char *name
, domain_enum domain
)
3914 struct compunit_symtab
*stab_best
= NULL
;
3915 struct mapped_index
*index
;
3917 dw2_setup (objfile
);
3919 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3921 index
= dwarf2_per_objfile
->index_table
;
3923 /* index is NULL if OBJF_READNOW. */
3926 struct dw2_symtab_iterator iter
;
3927 struct dwarf2_per_cu_data
*per_cu
;
3929 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3931 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3933 struct symbol
*sym
, *with_opaque
= NULL
;
3934 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3935 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3936 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3938 sym
= block_find_symbol (block
, name
, domain
,
3939 block_find_non_opaque_type_preferred
,
3942 /* Some caution must be observed with overloaded functions
3943 and methods, since the index will not contain any overload
3944 information (but NAME might contain it). */
3947 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3949 if (with_opaque
!= NULL
3950 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3953 /* Keep looking through other CUs. */
3961 dw2_print_stats (struct objfile
*objfile
)
3963 int i
, total
, count
;
3965 dw2_setup (objfile
);
3966 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3968 for (i
= 0; i
< total
; ++i
)
3970 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3972 if (!per_cu
->v
.quick
->compunit_symtab
)
3975 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3976 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3979 /* This dumps minimal information about the index.
3980 It is called via "mt print objfiles".
3981 One use is to verify .gdb_index has been loaded by the
3982 gdb.dwarf2/gdb-index.exp testcase. */
3985 dw2_dump (struct objfile
*objfile
)
3987 dw2_setup (objfile
);
3988 gdb_assert (dwarf2_per_objfile
->using_index
);
3989 printf_filtered (".gdb_index:");
3990 if (dwarf2_per_objfile
->index_table
!= NULL
)
3992 printf_filtered (" version %d\n",
3993 dwarf2_per_objfile
->index_table
->version
);
3996 printf_filtered (" faked for \"readnow\"\n");
3997 printf_filtered ("\n");
4001 dw2_relocate (struct objfile
*objfile
,
4002 const struct section_offsets
*new_offsets
,
4003 const struct section_offsets
*delta
)
4005 /* There's nothing to relocate here. */
4009 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4010 const char *func_name
)
4012 struct mapped_index
*index
;
4014 dw2_setup (objfile
);
4016 index
= dwarf2_per_objfile
->index_table
;
4018 /* index is NULL if OBJF_READNOW. */
4021 struct dw2_symtab_iterator iter
;
4022 struct dwarf2_per_cu_data
*per_cu
;
4024 /* Note: It doesn't matter what we pass for block_index here. */
4025 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4028 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4029 dw2_instantiate_symtab (per_cu
);
4034 dw2_expand_all_symtabs (struct objfile
*objfile
)
4038 dw2_setup (objfile
);
4040 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4041 + dwarf2_per_objfile
->n_type_units
); ++i
)
4043 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4045 dw2_instantiate_symtab (per_cu
);
4050 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4051 const char *fullname
)
4055 dw2_setup (objfile
);
4057 /* We don't need to consider type units here.
4058 This is only called for examining code, e.g. expand_line_sal.
4059 There can be an order of magnitude (or more) more type units
4060 than comp units, and we avoid them if we can. */
4062 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4065 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4066 struct quick_file_names
*file_data
;
4068 /* We only need to look at symtabs not already expanded. */
4069 if (per_cu
->v
.quick
->compunit_symtab
)
4072 file_data
= dw2_get_file_names (per_cu
);
4073 if (file_data
== NULL
)
4076 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4078 const char *this_fullname
= file_data
->file_names
[j
];
4080 if (filename_cmp (this_fullname
, fullname
) == 0)
4082 dw2_instantiate_symtab (per_cu
);
4090 dw2_map_matching_symbols (struct objfile
*objfile
,
4091 const char * name
, domain_enum domain
,
4093 int (*callback
) (struct block
*,
4094 struct symbol
*, void *),
4095 void *data
, symbol_name_match_type match
,
4096 symbol_compare_ftype
*ordered_compare
)
4098 /* Currently unimplemented; used for Ada. The function can be called if the
4099 current language is Ada for a non-Ada objfile using GNU index. As Ada
4100 does not look for non-Ada symbols this function should just return. */
4103 /* Symbol name matcher for .gdb_index names.
4105 Symbol names in .gdb_index have a few particularities:
4107 - There's no indication of which is the language of each symbol.
4109 Since each language has its own symbol name matching algorithm,
4110 and we don't know which language is the right one, we must match
4111 each symbol against all languages. This would be a potential
4112 performance problem if it were not mitigated by the
4113 mapped_index::name_components lookup table, which significantly
4114 reduces the number of times we need to call into this matcher,
4115 making it a non-issue.
4117 - Symbol names in the index have no overload (parameter)
4118 information. I.e., in C++, "foo(int)" and "foo(long)" both
4119 appear as "foo" in the index, for example.
4121 This means that the lookup names passed to the symbol name
4122 matcher functions must have no parameter information either
4123 because (e.g.) symbol search name "foo" does not match
4124 lookup-name "foo(int)" [while swapping search name for lookup
4127 class gdb_index_symbol_name_matcher
4130 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4131 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4133 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4134 Returns true if any matcher matches. */
4135 bool matches (const char *symbol_name
);
4138 /* A reference to the lookup name we're matching against. */
4139 const lookup_name_info
&m_lookup_name
;
4141 /* A vector holding all the different symbol name matchers, for all
4143 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4146 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4147 (const lookup_name_info
&lookup_name
)
4148 : m_lookup_name (lookup_name
)
4150 /* Prepare the vector of comparison functions upfront, to avoid
4151 doing the same work for each symbol. Care is taken to avoid
4152 matching with the same matcher more than once if/when multiple
4153 languages use the same matcher function. */
4154 auto &matchers
= m_symbol_name_matcher_funcs
;
4155 matchers
.reserve (nr_languages
);
4157 matchers
.push_back (default_symbol_name_matcher
);
4159 for (int i
= 0; i
< nr_languages
; i
++)
4161 const language_defn
*lang
= language_def ((enum language
) i
);
4162 if (lang
->la_get_symbol_name_matcher
!= NULL
)
4164 symbol_name_matcher_ftype
*name_matcher
4165 = lang
->la_get_symbol_name_matcher (m_lookup_name
);
4167 /* Don't insert the same comparison routine more than once.
4168 Note that we do this linear walk instead of a cheaper
4169 sorted insert, or use a std::set or something like that,
4170 because relative order of function addresses is not
4171 stable. This is not a problem in practice because the
4172 number of supported languages is low, and the cost here
4173 is tiny compared to the number of searches we'll do
4174 afterwards using this object. */
4175 if (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4177 matchers
.push_back (name_matcher
);
4183 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4185 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4186 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4192 /* Helper for dw2_expand_symtabs_matching that works with a
4193 mapped_index instead of the containing objfile. This is split to a
4194 separate function in order to be able to unit test the
4195 name_components matching using a mock mapped_index. For each
4196 symbol name that matches, calls MATCH_CALLBACK, passing it the
4197 symbol's index in the mapped_index symbol table. */
4200 dw2_expand_symtabs_matching_symbol
4201 (mapped_index
&index
,
4202 const lookup_name_info
&lookup_name_in
,
4203 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4204 enum search_domain kind
,
4205 gdb::function_view
<void (offset_type
)> match_callback
)
4207 lookup_name_info lookup_name_without_params
4208 = lookup_name_in
.make_ignore_params ();
4209 gdb_index_symbol_name_matcher lookup_name_matcher
4210 (lookup_name_without_params
);
4212 auto *name_cmp
= case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
;
4214 /* Build the symbol name component sorted vector, if we haven't yet.
4215 The code below only knows how to break apart components of C++
4216 symbol names (and other languages that use '::' as
4217 namespace/module separator). If we add support for wild matching
4218 to some language that uses some other operator (E.g., Ada, Go and
4219 D use '.'), then we'll need to try splitting the symbol name
4220 according to that language too. Note that Ada does support wild
4221 matching, but doesn't currently support .gdb_index. */
4222 if (index
.name_components
.empty ())
4224 for (size_t iter
= 0; iter
< index
.symbol_table_slots
; ++iter
)
4226 offset_type idx
= 2 * iter
;
4228 if (index
.symbol_table
[idx
] == 0
4229 && index
.symbol_table
[idx
+ 1] == 0)
4232 const char *name
= index
.symbol_name_at (idx
);
4234 /* Add each name component to the name component table. */
4235 unsigned int previous_len
= 0;
4236 for (unsigned int current_len
= cp_find_first_component (name
);
4237 name
[current_len
] != '\0';
4238 current_len
+= cp_find_first_component (name
+ current_len
))
4240 gdb_assert (name
[current_len
] == ':');
4241 index
.name_components
.push_back ({previous_len
, idx
});
4242 /* Skip the '::'. */
4244 previous_len
= current_len
;
4246 index
.name_components
.push_back ({previous_len
, idx
});
4249 /* Sort name_components elements by name. */
4250 auto name_comp_compare
= [&] (const name_component
&left
,
4251 const name_component
&right
)
4253 const char *left_qualified
= index
.symbol_name_at (left
.idx
);
4254 const char *right_qualified
= index
.symbol_name_at (right
.idx
);
4256 const char *left_name
= left_qualified
+ left
.name_offset
;
4257 const char *right_name
= right_qualified
+ right
.name_offset
;
4259 return name_cmp (left_name
, right_name
) < 0;
4262 std::sort (index
.name_components
.begin (),
4263 index
.name_components
.end (),
4268 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4270 /* Comparison function object for lower_bound that matches against a
4271 given symbol name. */
4272 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4275 const char *elem_qualified
= index
.symbol_name_at (elem
.idx
);
4276 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4277 return name_cmp (elem_name
, name
) < 0;
4280 /* Comparison function object for upper_bound that matches against a
4281 given symbol name. */
4282 auto lookup_compare_upper
= [&] (const char *name
,
4283 const name_component
&elem
)
4285 const char *elem_qualified
= index
.symbol_name_at (elem
.idx
);
4286 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4287 return name_cmp (name
, elem_name
) < 0;
4290 auto begin
= index
.name_components
.begin ();
4291 auto end
= index
.name_components
.end ();
4293 /* Find the lower bound. */
4296 if (lookup_name_in
.completion_mode () && cplus
[0] == '\0')
4299 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4302 /* Find the upper bound. */
4305 if (lookup_name_in
.completion_mode ())
4307 /* The string frobbing below won't work if the string is
4308 empty. We don't need it then, anyway -- if we're
4309 completing an empty string, then we want to iterate over
4311 if (cplus
[0] == '\0')
4314 /* In completion mode, increment the last character because
4315 we want UPPER to point past all symbols names that have
4317 std::string after
= cplus
;
4319 gdb_assert (after
.back () != 0xff);
4322 return std::upper_bound (lower
, end
, after
.c_str (),
4323 lookup_compare_upper
);
4326 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4329 /* Now for each symbol name in range, check to see if we have a name
4330 match, and if so, call the MATCH_CALLBACK callback. */
4332 /* The same symbol may appear more than once in the range though.
4333 E.g., if we're looking for symbols that complete "w", and we have
4334 a symbol named "w1::w2", we'll find the two name components for
4335 that same symbol in the range. To be sure we only call the
4336 callback once per symbol, we first collect the symbol name
4337 indexes that matched in a temporary vector and ignore
4339 std::vector
<offset_type
> matches
;
4340 matches
.reserve (std::distance (lower
, upper
));
4342 for (;lower
!= upper
; ++lower
)
4344 const char *qualified
= index
.symbol_name_at (lower
->idx
);
4346 if (!lookup_name_matcher
.matches (qualified
)
4347 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4350 matches
.push_back (lower
->idx
);
4353 std::sort (matches
.begin (), matches
.end ());
4355 /* Finally call the callback, once per match. */
4357 for (offset_type idx
: matches
)
4361 match_callback (idx
);
4366 /* Above we use a type wider than idx's for 'prev', since 0 and
4367 (offset_type)-1 are both possible values. */
4368 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4373 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4375 /* A wrapper around mapped_index that builds a mock mapped_index, from
4376 the symbol list passed as parameter to the constructor. */
4377 class mock_mapped_index
4381 mock_mapped_index (const char *(&symbols
)[N
])
4382 : mock_mapped_index (symbols
, N
)
4385 /* Access the built index. */
4386 mapped_index
&index ()
4390 mock_mapped_index(const mock_mapped_index
&) = delete;
4391 void operator= (const mock_mapped_index
&) = delete;
4394 mock_mapped_index (const char **symbols
, size_t symbols_size
)
4396 /* No string can live at offset zero. Add a dummy entry. */
4397 obstack_grow_str0 (&m_constant_pool
, "");
4399 for (size_t i
= 0; i
< symbols_size
; i
++)
4401 const char *sym
= symbols
[i
];
4402 size_t offset
= obstack_object_size (&m_constant_pool
);
4403 obstack_grow_str0 (&m_constant_pool
, sym
);
4404 m_symbol_table
.push_back (offset
);
4405 m_symbol_table
.push_back (0);
4408 m_index
.constant_pool
= (const char *) obstack_base (&m_constant_pool
);
4409 m_index
.symbol_table
= m_symbol_table
.data ();
4410 m_index
.symbol_table_slots
= m_symbol_table
.size () / 2;
4414 /* The built mapped_index. */
4415 mapped_index m_index
{};
4417 /* The storage that the built mapped_index uses for symbol and
4418 constant pool tables. */
4419 std::vector
<offset_type
> m_symbol_table
;
4420 auto_obstack m_constant_pool
;
4423 /* Convenience function that converts a NULL pointer to a "<null>"
4424 string, to pass to print routines. */
4427 string_or_null (const char *str
)
4429 return str
!= NULL
? str
: "<null>";
4432 /* Check if a lookup_name_info built from
4433 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4434 index. EXPECTED_LIST is the list of expected matches, in expected
4435 matching order. If no match expected, then an empty list is
4436 specified. Returns true on success. On failure prints a warning
4437 indicating the file:line that failed, and returns false. */
4440 check_match (const char *file
, int line
,
4441 mock_mapped_index
&mock_index
,
4442 const char *name
, symbol_name_match_type match_type
,
4443 bool completion_mode
,
4444 std::initializer_list
<const char *> expected_list
)
4446 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4448 bool matched
= true;
4450 auto mismatch
= [&] (const char *expected_str
,
4453 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4454 "expected=\"%s\", got=\"%s\"\n"),
4456 (match_type
== symbol_name_match_type::FULL
4458 name
, string_or_null (expected_str
), string_or_null (got
));
4462 auto expected_it
= expected_list
.begin ();
4463 auto expected_end
= expected_list
.end ();
4465 dw2_expand_symtabs_matching_symbol (mock_index
.index (), lookup_name
,
4467 [&] (offset_type idx
)
4469 const char *matched_name
= mock_index
.index ().symbol_name_at (idx
);
4470 const char *expected_str
4471 = expected_it
== expected_end
? NULL
: *expected_it
++;
4473 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4474 mismatch (expected_str
, matched_name
);
4477 const char *expected_str
4478 = expected_it
== expected_end
? NULL
: *expected_it
++;
4479 if (expected_str
!= NULL
)
4480 mismatch (expected_str
, NULL
);
4485 /* The symbols added to the mock mapped_index for testing (in
4487 static const char *test_symbols
[] = {
4497 /* A name with all sorts of complications. Starts with "z" to make
4498 it easier for the completion tests below. */
4499 #define Z_SYM_NAME \
4500 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4501 "::tuple<(anonymous namespace)::ui*, " \
4502 "std::default_delete<(anonymous namespace)::ui>, void>"
4510 mock_mapped_index
mock_index (test_symbols
);
4512 /* We let all tests run until the end even if some fails, for debug
4514 bool any_mismatch
= false;
4516 /* Create the expected symbols list (an initializer_list). Needed
4517 because lists have commas, and we need to pass them to CHECK,
4518 which is a macro. */
4519 #define EXPECT(...) { __VA_ARGS__ }
4521 /* Wrapper for check_match that passes down the current
4522 __FILE__/__LINE__. */
4523 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4524 any_mismatch |= !check_match (__FILE__, __LINE__, \
4526 NAME, MATCH_TYPE, COMPLETION_MODE, \
4529 /* Identity checks. */
4530 for (const char *sym
: test_symbols
)
4532 /* Should be able to match all existing symbols. */
4533 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4536 /* Should be able to match all existing symbols with
4538 std::string with_params
= std::string (sym
) + "(int)";
4539 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4542 /* Should be able to match all existing symbols with
4543 parameters and qualifiers. */
4544 with_params
= std::string (sym
) + " ( int ) const";
4545 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4548 /* This should really find sym, but cp-name-parser.y doesn't
4549 know about lvalue/rvalue qualifiers yet. */
4550 with_params
= std::string (sym
) + " ( int ) &&";
4551 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4555 /* Check that completion mode works at each prefix of the expected
4558 static const char str
[] = "function(int)";
4559 size_t len
= strlen (str
);
4562 for (size_t i
= 1; i
< len
; i
++)
4564 lookup
.assign (str
, i
);
4565 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4566 EXPECT ("function"));
4570 /* While "w" is a prefix of both components, the match function
4571 should still only be called once. */
4573 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4577 /* Same, with a "complicated" symbol. */
4579 static const char str
[] = Z_SYM_NAME
;
4580 size_t len
= strlen (str
);
4583 for (size_t i
= 1; i
< len
; i
++)
4585 lookup
.assign (str
, i
);
4586 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4587 EXPECT (Z_SYM_NAME
));
4591 /* In FULL mode, an incomplete symbol doesn't match. */
4593 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4597 /* A complete symbol with parameters matches any overload, since the
4598 index has no overload info. */
4600 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4601 EXPECT ("std::zfunction", "std::zfunction2"));
4604 /* Check that whitespace is ignored appropriately. A symbol with a
4605 template argument list. */
4607 static const char expected
[] = "ns::foo<int>";
4608 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4612 /* Check that whitespace is ignored appropriately. A symbol with a
4613 template argument list that includes a pointer. */
4615 static const char expected
[] = "ns::foo<char*>";
4616 /* Try both completion and non-completion modes. */
4617 static const bool completion_mode
[2] = {false, true};
4618 for (size_t i
= 0; i
< 2; i
++)
4620 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4621 completion_mode
[i
], EXPECT (expected
));
4623 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4624 completion_mode
[i
], EXPECT (expected
));
4629 /* Check method qualifiers are ignored. */
4630 static const char expected
[] = "ns::foo<char*>";
4631 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4632 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4633 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4634 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4637 /* Test lookup names that don't match anything. */
4639 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4643 SELF_CHECK (!any_mismatch
);
4649 }} // namespace selftests::dw2_expand_symtabs_matching
4651 #endif /* GDB_SELF_TEST */
4653 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4654 matched, to expand corresponding CUs that were marked. IDX is the
4655 index of the symbol name that matched. */
4658 dw2_expand_marked_cus
4659 (mapped_index
&index
, offset_type idx
,
4660 struct objfile
*objfile
,
4661 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4662 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4666 offset_type
*vec
, vec_len
, vec_idx
;
4667 bool global_seen
= false;
4669 vec
= (offset_type
*) (index
.constant_pool
4670 + MAYBE_SWAP (index
.symbol_table
[idx
+ 1]));
4671 vec_len
= MAYBE_SWAP (vec
[0]);
4672 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4674 struct dwarf2_per_cu_data
*per_cu
;
4675 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4676 /* This value is only valid for index versions >= 7. */
4677 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4678 gdb_index_symbol_kind symbol_kind
=
4679 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4680 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4681 /* Only check the symbol attributes if they're present.
4682 Indices prior to version 7 don't record them,
4683 and indices >= 7 may elide them for certain symbols
4684 (gold does this). */
4687 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4689 /* Work around gold/15646. */
4692 if (!is_static
&& global_seen
)
4698 /* Only check the symbol's kind if it has one. */
4703 case VARIABLES_DOMAIN
:
4704 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4707 case FUNCTIONS_DOMAIN
:
4708 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4712 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4720 /* Don't crash on bad data. */
4721 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4722 + dwarf2_per_objfile
->n_type_units
))
4724 complaint (&symfile_complaints
,
4725 _(".gdb_index entry has bad CU index"
4726 " [in module %s]"), objfile_name (objfile
));
4730 per_cu
= dw2_get_cutu (cu_index
);
4731 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4733 int symtab_was_null
=
4734 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4736 dw2_instantiate_symtab (per_cu
);
4738 if (expansion_notify
!= NULL
4740 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4741 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4747 dw2_expand_symtabs_matching
4748 (struct objfile
*objfile
,
4749 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4750 const lookup_name_info
&lookup_name
,
4751 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4752 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4753 enum search_domain kind
)
4758 dw2_setup (objfile
);
4760 /* index_table is NULL if OBJF_READNOW. */
4761 if (!dwarf2_per_objfile
->index_table
)
4764 if (file_matcher
!= NULL
)
4766 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4768 NULL
, xcalloc
, xfree
));
4769 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4771 NULL
, xcalloc
, xfree
));
4773 /* The rule is CUs specify all the files, including those used by
4774 any TU, so there's no need to scan TUs here. */
4776 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4779 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4780 struct quick_file_names
*file_data
;
4785 per_cu
->v
.quick
->mark
= 0;
4787 /* We only need to look at symtabs not already expanded. */
4788 if (per_cu
->v
.quick
->compunit_symtab
)
4791 file_data
= dw2_get_file_names (per_cu
);
4792 if (file_data
== NULL
)
4795 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4797 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4799 per_cu
->v
.quick
->mark
= 1;
4803 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4805 const char *this_real_name
;
4807 if (file_matcher (file_data
->file_names
[j
], false))
4809 per_cu
->v
.quick
->mark
= 1;
4813 /* Before we invoke realpath, which can get expensive when many
4814 files are involved, do a quick comparison of the basenames. */
4815 if (!basenames_may_differ
4816 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4820 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4821 if (file_matcher (this_real_name
, false))
4823 per_cu
->v
.quick
->mark
= 1;
4828 slot
= htab_find_slot (per_cu
->v
.quick
->mark
4829 ? visited_found
.get ()
4830 : visited_not_found
.get (),
4836 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
4838 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
4840 kind
, [&] (offset_type idx
)
4842 dw2_expand_marked_cus (index
, idx
, objfile
, file_matcher
,
4843 expansion_notify
, kind
);
4847 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4850 static struct compunit_symtab
*
4851 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4856 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4857 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4860 if (cust
->includes
== NULL
)
4863 for (i
= 0; cust
->includes
[i
]; ++i
)
4865 struct compunit_symtab
*s
= cust
->includes
[i
];
4867 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4875 static struct compunit_symtab
*
4876 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4877 struct bound_minimal_symbol msymbol
,
4879 struct obj_section
*section
,
4882 struct dwarf2_per_cu_data
*data
;
4883 struct compunit_symtab
*result
;
4885 dw2_setup (objfile
);
4887 if (!objfile
->psymtabs_addrmap
)
4890 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4895 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4896 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4897 paddress (get_objfile_arch (objfile
), pc
));
4900 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4902 gdb_assert (result
!= NULL
);
4907 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4908 void *data
, int need_fullname
)
4910 dw2_setup (objfile
);
4912 if (!dwarf2_per_objfile
->filenames_cache
)
4914 dwarf2_per_objfile
->filenames_cache
.emplace ();
4916 htab_up
visited (htab_create_alloc (10,
4917 htab_hash_pointer
, htab_eq_pointer
,
4918 NULL
, xcalloc
, xfree
));
4920 /* The rule is CUs specify all the files, including those used
4921 by any TU, so there's no need to scan TUs here. We can
4922 ignore file names coming from already-expanded CUs. */
4924 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4926 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4928 if (per_cu
->v
.quick
->compunit_symtab
)
4930 void **slot
= htab_find_slot (visited
.get (),
4931 per_cu
->v
.quick
->file_names
,
4934 *slot
= per_cu
->v
.quick
->file_names
;
4938 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4941 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4942 struct quick_file_names
*file_data
;
4945 /* We only need to look at symtabs not already expanded. */
4946 if (per_cu
->v
.quick
->compunit_symtab
)
4949 file_data
= dw2_get_file_names (per_cu
);
4950 if (file_data
== NULL
)
4953 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4956 /* Already visited. */
4961 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4963 const char *filename
= file_data
->file_names
[j
];
4964 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4969 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4971 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4974 this_real_name
= gdb_realpath (filename
);
4975 (*fun
) (filename
, this_real_name
.get (), data
);
4980 dw2_has_symbols (struct objfile
*objfile
)
4985 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4988 dw2_find_last_source_symtab
,
4989 dw2_forget_cached_source_info
,
4990 dw2_map_symtabs_matching_filename
,
4995 dw2_expand_symtabs_for_function
,
4996 dw2_expand_all_symtabs
,
4997 dw2_expand_symtabs_with_fullname
,
4998 dw2_map_matching_symbols
,
4999 dw2_expand_symtabs_matching
,
5000 dw2_find_pc_sect_compunit_symtab
,
5001 dw2_map_symbol_filenames
5004 /* Initialize for reading DWARF for this objfile. Return 0 if this
5005 file will use psymtabs, or 1 if using the GNU index. */
5008 dwarf2_initialize_objfile (struct objfile
*objfile
)
5010 /* If we're about to read full symbols, don't bother with the
5011 indices. In this case we also don't care if some other debug
5012 format is making psymtabs, because they are all about to be
5014 if ((objfile
->flags
& OBJF_READNOW
))
5018 dwarf2_per_objfile
->using_index
= 1;
5019 create_all_comp_units (objfile
);
5020 create_all_type_units (objfile
);
5021 dwarf2_per_objfile
->quick_file_names_table
=
5022 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
5024 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
5025 + dwarf2_per_objfile
->n_type_units
); ++i
)
5027 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
5029 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5030 struct dwarf2_per_cu_quick_data
);
5033 /* Return 1 so that gdb sees the "quick" functions. However,
5034 these functions will be no-ops because we will have expanded
5039 if (dwarf2_read_index (objfile
))
5047 /* Build a partial symbol table. */
5050 dwarf2_build_psymtabs (struct objfile
*objfile
)
5053 if (objfile
->global_psymbols
.capacity () == 0
5054 && objfile
->static_psymbols
.capacity () == 0)
5055 init_psymbol_list (objfile
, 1024);
5059 /* This isn't really ideal: all the data we allocate on the
5060 objfile's obstack is still uselessly kept around. However,
5061 freeing it seems unsafe. */
5062 psymtab_discarder
psymtabs (objfile
);
5063 dwarf2_build_psymtabs_hard (objfile
);
5066 CATCH (except
, RETURN_MASK_ERROR
)
5068 exception_print (gdb_stderr
, except
);
5073 /* Return the total length of the CU described by HEADER. */
5076 get_cu_length (const struct comp_unit_head
*header
)
5078 return header
->initial_length_size
+ header
->length
;
5081 /* Return TRUE if SECT_OFF is within CU_HEADER. */
5084 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
5086 sect_offset bottom
= cu_header
->sect_off
;
5087 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
5089 return sect_off
>= bottom
&& sect_off
< top
;
5092 /* Find the base address of the compilation unit for range lists and
5093 location lists. It will normally be specified by DW_AT_low_pc.
5094 In DWARF-3 draft 4, the base address could be overridden by
5095 DW_AT_entry_pc. It's been removed, but GCC still uses this for
5096 compilation units with discontinuous ranges. */
5099 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
5101 struct attribute
*attr
;
5104 cu
->base_address
= 0;
5106 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
5109 cu
->base_address
= attr_value_as_address (attr
);
5114 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5117 cu
->base_address
= attr_value_as_address (attr
);
5123 /* Read in the comp unit header information from the debug_info at info_ptr.
5124 Use rcuh_kind::COMPILE as the default type if not known by the caller.
5125 NOTE: This leaves members offset, first_die_offset to be filled in
5128 static const gdb_byte
*
5129 read_comp_unit_head (struct comp_unit_head
*cu_header
,
5130 const gdb_byte
*info_ptr
,
5131 struct dwarf2_section_info
*section
,
5132 rcuh_kind section_kind
)
5135 unsigned int bytes_read
;
5136 const char *filename
= get_section_file_name (section
);
5137 bfd
*abfd
= get_section_bfd_owner (section
);
5139 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
5140 cu_header
->initial_length_size
= bytes_read
;
5141 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
5142 info_ptr
+= bytes_read
;
5143 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
5145 if (cu_header
->version
< 5)
5146 switch (section_kind
)
5148 case rcuh_kind::COMPILE
:
5149 cu_header
->unit_type
= DW_UT_compile
;
5151 case rcuh_kind::TYPE
:
5152 cu_header
->unit_type
= DW_UT_type
;
5155 internal_error (__FILE__
, __LINE__
,
5156 _("read_comp_unit_head: invalid section_kind"));
5160 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
5161 (read_1_byte (abfd
, info_ptr
));
5163 switch (cu_header
->unit_type
)
5166 if (section_kind
!= rcuh_kind::COMPILE
)
5167 error (_("Dwarf Error: wrong unit_type in compilation unit header "
5168 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
5172 section_kind
= rcuh_kind::TYPE
;
5175 error (_("Dwarf Error: wrong unit_type in compilation unit header "
5176 "(is %d, should be %d or %d) [in module %s]"),
5177 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
5180 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
5183 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
5186 info_ptr
+= bytes_read
;
5187 if (cu_header
->version
< 5)
5189 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
5192 signed_addr
= bfd_get_sign_extend_vma (abfd
);
5193 if (signed_addr
< 0)
5194 internal_error (__FILE__
, __LINE__
,
5195 _("read_comp_unit_head: dwarf from non elf file"));
5196 cu_header
->signed_addr_p
= signed_addr
;
5198 if (section_kind
== rcuh_kind::TYPE
)
5200 LONGEST type_offset
;
5202 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
5205 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
5206 info_ptr
+= bytes_read
;
5207 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
5208 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
5209 error (_("Dwarf Error: Too big type_offset in compilation unit "
5210 "header (is %s) [in module %s]"), plongest (type_offset
),
5217 /* Helper function that returns the proper abbrev section for
5220 static struct dwarf2_section_info
*
5221 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
5223 struct dwarf2_section_info
*abbrev
;
5225 if (this_cu
->is_dwz
)
5226 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
5228 abbrev
= &dwarf2_per_objfile
->abbrev
;
5233 /* Subroutine of read_and_check_comp_unit_head and
5234 read_and_check_type_unit_head to simplify them.
5235 Perform various error checking on the header. */
5238 error_check_comp_unit_head (struct comp_unit_head
*header
,
5239 struct dwarf2_section_info
*section
,
5240 struct dwarf2_section_info
*abbrev_section
)
5242 const char *filename
= get_section_file_name (section
);
5244 if (header
->version
< 2 || header
->version
> 5)
5245 error (_("Dwarf Error: wrong version in compilation unit header "
5246 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
5249 if (to_underlying (header
->abbrev_sect_off
)
5250 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
5251 error (_("Dwarf Error: bad offset (0x%x) in compilation unit header "
5252 "(offset 0x%x + 6) [in module %s]"),
5253 to_underlying (header
->abbrev_sect_off
),
5254 to_underlying (header
->sect_off
),
5257 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
5258 avoid potential 32-bit overflow. */
5259 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
5261 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
5262 "(offset 0x%x + 0) [in module %s]"),
5263 header
->length
, to_underlying (header
->sect_off
),
5267 /* Read in a CU/TU header and perform some basic error checking.
5268 The contents of the header are stored in HEADER.
5269 The result is a pointer to the start of the first DIE. */
5271 static const gdb_byte
*
5272 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
5273 struct dwarf2_section_info
*section
,
5274 struct dwarf2_section_info
*abbrev_section
,
5275 const gdb_byte
*info_ptr
,
5276 rcuh_kind section_kind
)
5278 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
5279 bfd
*abfd
= get_section_bfd_owner (section
);
5281 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
5283 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
5285 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
5287 error_check_comp_unit_head (header
, section
, abbrev_section
);
5292 /* Fetch the abbreviation table offset from a comp or type unit header. */
5295 read_abbrev_offset (struct dwarf2_section_info
*section
,
5296 sect_offset sect_off
)
5298 bfd
*abfd
= get_section_bfd_owner (section
);
5299 const gdb_byte
*info_ptr
;
5300 unsigned int initial_length_size
, offset_size
;
5303 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
5304 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
5305 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5306 offset_size
= initial_length_size
== 4 ? 4 : 8;
5307 info_ptr
+= initial_length_size
;
5309 version
= read_2_bytes (abfd
, info_ptr
);
5313 /* Skip unit type and address size. */
5317 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
5320 /* Allocate a new partial symtab for file named NAME and mark this new
5321 partial symtab as being an include of PST. */
5324 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
5325 struct objfile
*objfile
)
5327 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
5329 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
5331 /* It shares objfile->objfile_obstack. */
5332 subpst
->dirname
= pst
->dirname
;
5335 subpst
->textlow
= 0;
5336 subpst
->texthigh
= 0;
5338 subpst
->dependencies
5339 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
5340 subpst
->dependencies
[0] = pst
;
5341 subpst
->number_of_dependencies
= 1;
5343 subpst
->globals_offset
= 0;
5344 subpst
->n_global_syms
= 0;
5345 subpst
->statics_offset
= 0;
5346 subpst
->n_static_syms
= 0;
5347 subpst
->compunit_symtab
= NULL
;
5348 subpst
->read_symtab
= pst
->read_symtab
;
5351 /* No private part is necessary for include psymtabs. This property
5352 can be used to differentiate between such include psymtabs and
5353 the regular ones. */
5354 subpst
->read_symtab_private
= NULL
;
5357 /* Read the Line Number Program data and extract the list of files
5358 included by the source file represented by PST. Build an include
5359 partial symtab for each of these included files. */
5362 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
5363 struct die_info
*die
,
5364 struct partial_symtab
*pst
)
5367 struct attribute
*attr
;
5369 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5371 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
5373 return; /* No linetable, so no includes. */
5375 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
5376 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
5380 hash_signatured_type (const void *item
)
5382 const struct signatured_type
*sig_type
5383 = (const struct signatured_type
*) item
;
5385 /* This drops the top 32 bits of the signature, but is ok for a hash. */
5386 return sig_type
->signature
;
5390 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
5392 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
5393 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
5395 return lhs
->signature
== rhs
->signature
;
5398 /* Allocate a hash table for signatured types. */
5401 allocate_signatured_type_table (struct objfile
*objfile
)
5403 return htab_create_alloc_ex (41,
5404 hash_signatured_type
,
5407 &objfile
->objfile_obstack
,
5408 hashtab_obstack_allocate
,
5409 dummy_obstack_deallocate
);
5412 /* A helper function to add a signatured type CU to a table. */
5415 add_signatured_type_cu_to_table (void **slot
, void *datum
)
5417 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
5418 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
5426 /* A helper for create_debug_types_hash_table. Read types from SECTION
5427 and fill them into TYPES_HTAB. It will process only type units,
5428 therefore DW_UT_type. */
5431 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
5432 dwarf2_section_info
*section
, htab_t
&types_htab
,
5433 rcuh_kind section_kind
)
5435 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5436 struct dwarf2_section_info
*abbrev_section
;
5438 const gdb_byte
*info_ptr
, *end_ptr
;
5440 abbrev_section
= (dwo_file
!= NULL
5441 ? &dwo_file
->sections
.abbrev
5442 : &dwarf2_per_objfile
->abbrev
);
5444 if (dwarf_read_debug
)
5445 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
5446 get_section_name (section
),
5447 get_section_file_name (abbrev_section
));
5449 dwarf2_read_section (objfile
, section
);
5450 info_ptr
= section
->buffer
;
5452 if (info_ptr
== NULL
)
5455 /* We can't set abfd until now because the section may be empty or
5456 not present, in which case the bfd is unknown. */
5457 abfd
= get_section_bfd_owner (section
);
5459 /* We don't use init_cutu_and_read_dies_simple, or some such, here
5460 because we don't need to read any dies: the signature is in the
5463 end_ptr
= info_ptr
+ section
->size
;
5464 while (info_ptr
< end_ptr
)
5466 struct signatured_type
*sig_type
;
5467 struct dwo_unit
*dwo_tu
;
5469 const gdb_byte
*ptr
= info_ptr
;
5470 struct comp_unit_head header
;
5471 unsigned int length
;
5473 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
5475 /* Initialize it due to a false compiler warning. */
5476 header
.signature
= -1;
5477 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
5479 /* We need to read the type's signature in order to build the hash
5480 table, but we don't need anything else just yet. */
5482 ptr
= read_and_check_comp_unit_head (&header
, section
,
5483 abbrev_section
, ptr
, section_kind
);
5485 length
= get_cu_length (&header
);
5487 /* Skip dummy type units. */
5488 if (ptr
>= info_ptr
+ length
5489 || peek_abbrev_code (abfd
, ptr
) == 0
5490 || header
.unit_type
!= DW_UT_type
)
5496 if (types_htab
== NULL
)
5499 types_htab
= allocate_dwo_unit_table (objfile
);
5501 types_htab
= allocate_signatured_type_table (objfile
);
5507 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5509 dwo_tu
->dwo_file
= dwo_file
;
5510 dwo_tu
->signature
= header
.signature
;
5511 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
5512 dwo_tu
->section
= section
;
5513 dwo_tu
->sect_off
= sect_off
;
5514 dwo_tu
->length
= length
;
5518 /* N.B.: type_offset is not usable if this type uses a DWO file.
5519 The real type_offset is in the DWO file. */
5521 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5522 struct signatured_type
);
5523 sig_type
->signature
= header
.signature
;
5524 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
5525 sig_type
->per_cu
.objfile
= objfile
;
5526 sig_type
->per_cu
.is_debug_types
= 1;
5527 sig_type
->per_cu
.section
= section
;
5528 sig_type
->per_cu
.sect_off
= sect_off
;
5529 sig_type
->per_cu
.length
= length
;
5532 slot
= htab_find_slot (types_htab
,
5533 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
5535 gdb_assert (slot
!= NULL
);
5538 sect_offset dup_sect_off
;
5542 const struct dwo_unit
*dup_tu
5543 = (const struct dwo_unit
*) *slot
;
5545 dup_sect_off
= dup_tu
->sect_off
;
5549 const struct signatured_type
*dup_tu
5550 = (const struct signatured_type
*) *slot
;
5552 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
5555 complaint (&symfile_complaints
,
5556 _("debug type entry at offset 0x%x is duplicate to"
5557 " the entry at offset 0x%x, signature %s"),
5558 to_underlying (sect_off
), to_underlying (dup_sect_off
),
5559 hex_string (header
.signature
));
5561 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
5563 if (dwarf_read_debug
> 1)
5564 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
5565 to_underlying (sect_off
),
5566 hex_string (header
.signature
));
5572 /* Create the hash table of all entries in the .debug_types
5573 (or .debug_types.dwo) section(s).
5574 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
5575 otherwise it is NULL.
5577 The result is a pointer to the hash table or NULL if there are no types.
5579 Note: This function processes DWO files only, not DWP files. */
5582 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
5583 VEC (dwarf2_section_info_def
) *types
,
5587 struct dwarf2_section_info
*section
;
5589 if (VEC_empty (dwarf2_section_info_def
, types
))
5593 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
5595 create_debug_type_hash_table (dwo_file
, section
, types_htab
,
5599 /* Create the hash table of all entries in the .debug_types section,
5600 and initialize all_type_units.
5601 The result is zero if there is an error (e.g. missing .debug_types section),
5602 otherwise non-zero. */
5605 create_all_type_units (struct objfile
*objfile
)
5607 htab_t types_htab
= NULL
;
5608 struct signatured_type
**iter
;
5610 create_debug_type_hash_table (NULL
, &dwarf2_per_objfile
->info
, types_htab
,
5611 rcuh_kind::COMPILE
);
5612 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
5613 if (types_htab
== NULL
)
5615 dwarf2_per_objfile
->signatured_types
= NULL
;
5619 dwarf2_per_objfile
->signatured_types
= types_htab
;
5621 dwarf2_per_objfile
->n_type_units
5622 = dwarf2_per_objfile
->n_allocated_type_units
5623 = htab_elements (types_htab
);
5624 dwarf2_per_objfile
->all_type_units
=
5625 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
5626 iter
= &dwarf2_per_objfile
->all_type_units
[0];
5627 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
5628 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
5629 == dwarf2_per_objfile
->n_type_units
);
5634 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
5635 If SLOT is non-NULL, it is the entry to use in the hash table.
5636 Otherwise we find one. */
5638 static struct signatured_type
*
5639 add_type_unit (ULONGEST sig
, void **slot
)
5641 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5642 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
5643 struct signatured_type
*sig_type
;
5645 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
5647 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
5649 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
5650 dwarf2_per_objfile
->n_allocated_type_units
= 1;
5651 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
5652 dwarf2_per_objfile
->all_type_units
5653 = XRESIZEVEC (struct signatured_type
*,
5654 dwarf2_per_objfile
->all_type_units
,
5655 dwarf2_per_objfile
->n_allocated_type_units
);
5656 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
5658 dwarf2_per_objfile
->n_type_units
= n_type_units
;
5660 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5661 struct signatured_type
);
5662 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
5663 sig_type
->signature
= sig
;
5664 sig_type
->per_cu
.is_debug_types
= 1;
5665 if (dwarf2_per_objfile
->using_index
)
5667 sig_type
->per_cu
.v
.quick
=
5668 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5669 struct dwarf2_per_cu_quick_data
);
5674 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5677 gdb_assert (*slot
== NULL
);
5679 /* The rest of sig_type must be filled in by the caller. */
5683 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
5684 Fill in SIG_ENTRY with DWO_ENTRY. */
5687 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
5688 struct signatured_type
*sig_entry
,
5689 struct dwo_unit
*dwo_entry
)
5691 /* Make sure we're not clobbering something we don't expect to. */
5692 gdb_assert (! sig_entry
->per_cu
.queued
);
5693 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
5694 if (dwarf2_per_objfile
->using_index
)
5696 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
5697 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
5700 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
5701 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
5702 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
5703 gdb_assert (sig_entry
->type_unit_group
== NULL
);
5704 gdb_assert (sig_entry
->dwo_unit
== NULL
);
5706 sig_entry
->per_cu
.section
= dwo_entry
->section
;
5707 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
5708 sig_entry
->per_cu
.length
= dwo_entry
->length
;
5709 sig_entry
->per_cu
.reading_dwo_directly
= 1;
5710 sig_entry
->per_cu
.objfile
= objfile
;
5711 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
5712 sig_entry
->dwo_unit
= dwo_entry
;
5715 /* Subroutine of lookup_signatured_type.
5716 If we haven't read the TU yet, create the signatured_type data structure
5717 for a TU to be read in directly from a DWO file, bypassing the stub.
5718 This is the "Stay in DWO Optimization": When there is no DWP file and we're
5719 using .gdb_index, then when reading a CU we want to stay in the DWO file
5720 containing that CU. Otherwise we could end up reading several other DWO
5721 files (due to comdat folding) to process the transitive closure of all the
5722 mentioned TUs, and that can be slow. The current DWO file will have every
5723 type signature that it needs.
5724 We only do this for .gdb_index because in the psymtab case we already have
5725 to read all the DWOs to build the type unit groups. */
5727 static struct signatured_type
*
5728 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5730 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5731 struct dwo_file
*dwo_file
;
5732 struct dwo_unit find_dwo_entry
, *dwo_entry
;
5733 struct signatured_type find_sig_entry
, *sig_entry
;
5736 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5738 /* If TU skeletons have been removed then we may not have read in any
5740 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5742 dwarf2_per_objfile
->signatured_types
5743 = allocate_signatured_type_table (objfile
);
5746 /* We only ever need to read in one copy of a signatured type.
5747 Use the global signatured_types array to do our own comdat-folding
5748 of types. If this is the first time we're reading this TU, and
5749 the TU has an entry in .gdb_index, replace the recorded data from
5750 .gdb_index with this TU. */
5752 find_sig_entry
.signature
= sig
;
5753 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5754 &find_sig_entry
, INSERT
);
5755 sig_entry
= (struct signatured_type
*) *slot
;
5757 /* We can get here with the TU already read, *or* in the process of being
5758 read. Don't reassign the global entry to point to this DWO if that's
5759 the case. Also note that if the TU is already being read, it may not
5760 have come from a DWO, the program may be a mix of Fission-compiled
5761 code and non-Fission-compiled code. */
5763 /* Have we already tried to read this TU?
5764 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5765 needn't exist in the global table yet). */
5766 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
5769 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
5770 dwo_unit of the TU itself. */
5771 dwo_file
= cu
->dwo_unit
->dwo_file
;
5773 /* Ok, this is the first time we're reading this TU. */
5774 if (dwo_file
->tus
== NULL
)
5776 find_dwo_entry
.signature
= sig
;
5777 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
5778 if (dwo_entry
== NULL
)
5781 /* If the global table doesn't have an entry for this TU, add one. */
5782 if (sig_entry
== NULL
)
5783 sig_entry
= add_type_unit (sig
, slot
);
5785 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5786 sig_entry
->per_cu
.tu_read
= 1;
5790 /* Subroutine of lookup_signatured_type.
5791 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
5792 then try the DWP file. If the TU stub (skeleton) has been removed then
5793 it won't be in .gdb_index. */
5795 static struct signatured_type
*
5796 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5798 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5799 struct dwp_file
*dwp_file
= get_dwp_file ();
5800 struct dwo_unit
*dwo_entry
;
5801 struct signatured_type find_sig_entry
, *sig_entry
;
5804 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5805 gdb_assert (dwp_file
!= NULL
);
5807 /* If TU skeletons have been removed then we may not have read in any
5809 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5811 dwarf2_per_objfile
->signatured_types
5812 = allocate_signatured_type_table (objfile
);
5815 find_sig_entry
.signature
= sig
;
5816 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5817 &find_sig_entry
, INSERT
);
5818 sig_entry
= (struct signatured_type
*) *slot
;
5820 /* Have we already tried to read this TU?
5821 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5822 needn't exist in the global table yet). */
5823 if (sig_entry
!= NULL
)
5826 if (dwp_file
->tus
== NULL
)
5828 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5829 sig
, 1 /* is_debug_types */);
5830 if (dwo_entry
== NULL
)
5833 sig_entry
= add_type_unit (sig
, slot
);
5834 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5839 /* Lookup a signature based type for DW_FORM_ref_sig8.
5840 Returns NULL if signature SIG is not present in the table.
5841 It is up to the caller to complain about this. */
5843 static struct signatured_type
*
5844 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5847 && dwarf2_per_objfile
->using_index
)
5849 /* We're in a DWO/DWP file, and we're using .gdb_index.
5850 These cases require special processing. */
5851 if (get_dwp_file () == NULL
)
5852 return lookup_dwo_signatured_type (cu
, sig
);
5854 return lookup_dwp_signatured_type (cu
, sig
);
5858 struct signatured_type find_entry
, *entry
;
5860 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5862 find_entry
.signature
= sig
;
5863 entry
= ((struct signatured_type
*)
5864 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5869 /* Low level DIE reading support. */
5871 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5874 init_cu_die_reader (struct die_reader_specs
*reader
,
5875 struct dwarf2_cu
*cu
,
5876 struct dwarf2_section_info
*section
,
5877 struct dwo_file
*dwo_file
)
5879 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5880 reader
->abfd
= get_section_bfd_owner (section
);
5882 reader
->dwo_file
= dwo_file
;
5883 reader
->die_section
= section
;
5884 reader
->buffer
= section
->buffer
;
5885 reader
->buffer_end
= section
->buffer
+ section
->size
;
5886 reader
->comp_dir
= NULL
;
5889 /* Subroutine of init_cutu_and_read_dies to simplify it.
5890 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5891 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5894 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5895 from it to the DIE in the DWO. If NULL we are skipping the stub.
5896 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5897 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5898 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5899 STUB_COMP_DIR may be non-NULL.
5900 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5901 are filled in with the info of the DIE from the DWO file.
5902 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5903 provided an abbrev table to use.
5904 The result is non-zero if a valid (non-dummy) DIE was found. */
5907 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5908 struct dwo_unit
*dwo_unit
,
5909 int abbrev_table_provided
,
5910 struct die_info
*stub_comp_unit_die
,
5911 const char *stub_comp_dir
,
5912 struct die_reader_specs
*result_reader
,
5913 const gdb_byte
**result_info_ptr
,
5914 struct die_info
**result_comp_unit_die
,
5915 int *result_has_children
)
5917 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5918 struct dwarf2_cu
*cu
= this_cu
->cu
;
5919 struct dwarf2_section_info
*section
;
5921 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5922 ULONGEST signature
; /* Or dwo_id. */
5923 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5924 int i
,num_extra_attrs
;
5925 struct dwarf2_section_info
*dwo_abbrev_section
;
5926 struct attribute
*attr
;
5927 struct die_info
*comp_unit_die
;
5929 /* At most one of these may be provided. */
5930 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5932 /* These attributes aren't processed until later:
5933 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5934 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5935 referenced later. However, these attributes are found in the stub
5936 which we won't have later. In order to not impose this complication
5937 on the rest of the code, we read them here and copy them to the
5946 if (stub_comp_unit_die
!= NULL
)
5948 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5950 if (! this_cu
->is_debug_types
)
5951 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5952 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5953 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5954 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5955 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5957 /* There should be a DW_AT_addr_base attribute here (if needed).
5958 We need the value before we can process DW_FORM_GNU_addr_index. */
5960 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5962 cu
->addr_base
= DW_UNSND (attr
);
5964 /* There should be a DW_AT_ranges_base attribute here (if needed).
5965 We need the value before we can process DW_AT_ranges. */
5966 cu
->ranges_base
= 0;
5967 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5969 cu
->ranges_base
= DW_UNSND (attr
);
5971 else if (stub_comp_dir
!= NULL
)
5973 /* Reconstruct the comp_dir attribute to simplify the code below. */
5974 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5975 comp_dir
->name
= DW_AT_comp_dir
;
5976 comp_dir
->form
= DW_FORM_string
;
5977 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5978 DW_STRING (comp_dir
) = stub_comp_dir
;
5981 /* Set up for reading the DWO CU/TU. */
5982 cu
->dwo_unit
= dwo_unit
;
5983 section
= dwo_unit
->section
;
5984 dwarf2_read_section (objfile
, section
);
5985 abfd
= get_section_bfd_owner (section
);
5986 begin_info_ptr
= info_ptr
= (section
->buffer
5987 + to_underlying (dwo_unit
->sect_off
));
5988 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5989 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5991 if (this_cu
->is_debug_types
)
5993 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5995 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5997 info_ptr
, rcuh_kind::TYPE
);
5998 /* This is not an assert because it can be caused by bad debug info. */
5999 if (sig_type
->signature
!= cu
->header
.signature
)
6001 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6002 " TU at offset 0x%x [in module %s]"),
6003 hex_string (sig_type
->signature
),
6004 hex_string (cu
->header
.signature
),
6005 to_underlying (dwo_unit
->sect_off
),
6006 bfd_get_filename (abfd
));
6008 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6009 /* For DWOs coming from DWP files, we don't know the CU length
6010 nor the type's offset in the TU until now. */
6011 dwo_unit
->length
= get_cu_length (&cu
->header
);
6012 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6014 /* Establish the type offset that can be used to lookup the type.
6015 For DWO files, we don't know it until now. */
6016 sig_type
->type_offset_in_section
6017 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6021 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6023 info_ptr
, rcuh_kind::COMPILE
);
6024 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6025 /* For DWOs coming from DWP files, we don't know the CU length
6027 dwo_unit
->length
= get_cu_length (&cu
->header
);
6030 /* Replace the CU's original abbrev table with the DWO's.
6031 Reminder: We can't read the abbrev table until we've read the header. */
6032 if (abbrev_table_provided
)
6034 /* Don't free the provided abbrev table, the caller of
6035 init_cutu_and_read_dies owns it. */
6036 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
6037 /* Ensure the DWO abbrev table gets freed. */
6038 make_cleanup (dwarf2_free_abbrev_table
, cu
);
6042 dwarf2_free_abbrev_table (cu
);
6043 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
6044 /* Leave any existing abbrev table cleanup as is. */
6047 /* Read in the die, but leave space to copy over the attributes
6048 from the stub. This has the benefit of simplifying the rest of
6049 the code - all the work to maintain the illusion of a single
6050 DW_TAG_{compile,type}_unit DIE is done here. */
6051 num_extra_attrs
= ((stmt_list
!= NULL
)
6055 + (comp_dir
!= NULL
));
6056 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6057 result_has_children
, num_extra_attrs
);
6059 /* Copy over the attributes from the stub to the DIE we just read in. */
6060 comp_unit_die
= *result_comp_unit_die
;
6061 i
= comp_unit_die
->num_attrs
;
6062 if (stmt_list
!= NULL
)
6063 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6065 comp_unit_die
->attrs
[i
++] = *low_pc
;
6066 if (high_pc
!= NULL
)
6067 comp_unit_die
->attrs
[i
++] = *high_pc
;
6069 comp_unit_die
->attrs
[i
++] = *ranges
;
6070 if (comp_dir
!= NULL
)
6071 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6072 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6074 if (dwarf_die_debug
)
6076 fprintf_unfiltered (gdb_stdlog
,
6077 "Read die from %s@0x%x of %s:\n",
6078 get_section_name (section
),
6079 (unsigned) (begin_info_ptr
- section
->buffer
),
6080 bfd_get_filename (abfd
));
6081 dump_die (comp_unit_die
, dwarf_die_debug
);
6084 /* Save the comp_dir attribute. If there is no DWP file then we'll read
6085 TUs by skipping the stub and going directly to the entry in the DWO file.
6086 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
6087 to get it via circuitous means. Blech. */
6088 if (comp_dir
!= NULL
)
6089 result_reader
->comp_dir
= DW_STRING (comp_dir
);
6091 /* Skip dummy compilation units. */
6092 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6093 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6096 *result_info_ptr
= info_ptr
;
6100 /* Subroutine of init_cutu_and_read_dies to simplify it.
6101 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6102 Returns NULL if the specified DWO unit cannot be found. */
6104 static struct dwo_unit
*
6105 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6106 struct die_info
*comp_unit_die
)
6108 struct dwarf2_cu
*cu
= this_cu
->cu
;
6109 struct attribute
*attr
;
6111 struct dwo_unit
*dwo_unit
;
6112 const char *comp_dir
, *dwo_name
;
6114 gdb_assert (cu
!= NULL
);
6116 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6117 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
6118 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6120 if (this_cu
->is_debug_types
)
6122 struct signatured_type
*sig_type
;
6124 /* Since this_cu is the first member of struct signatured_type,
6125 we can go from a pointer to one to a pointer to the other. */
6126 sig_type
= (struct signatured_type
*) this_cu
;
6127 signature
= sig_type
->signature
;
6128 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6132 struct attribute
*attr
;
6134 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6136 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6138 dwo_name
, objfile_name (this_cu
->objfile
));
6139 signature
= DW_UNSND (attr
);
6140 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6147 /* Subroutine of init_cutu_and_read_dies to simplify it.
6148 See it for a description of the parameters.
6149 Read a TU directly from a DWO file, bypassing the stub.
6151 Note: This function could be a little bit simpler if we shared cleanups
6152 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
6153 to do, so we keep this function self-contained. Or we could move this
6154 into our caller, but it's complex enough already. */
6157 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
6158 int use_existing_cu
, int keep
,
6159 die_reader_func_ftype
*die_reader_func
,
6162 struct dwarf2_cu
*cu
;
6163 struct signatured_type
*sig_type
;
6164 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
6165 struct die_reader_specs reader
;
6166 const gdb_byte
*info_ptr
;
6167 struct die_info
*comp_unit_die
;
6170 /* Verify we can do the following downcast, and that we have the
6172 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6173 sig_type
= (struct signatured_type
*) this_cu
;
6174 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6176 cleanups
= make_cleanup (null_cleanup
, NULL
);
6178 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6180 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6182 /* There's no need to do the rereading_dwo_cu handling that
6183 init_cutu_and_read_dies does since we don't read the stub. */
6187 /* If !use_existing_cu, this_cu->cu must be NULL. */
6188 gdb_assert (this_cu
->cu
== NULL
);
6189 cu
= XNEW (struct dwarf2_cu
);
6190 init_one_comp_unit (cu
, this_cu
);
6191 /* If an error occurs while loading, release our storage. */
6192 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
6195 /* A future optimization, if needed, would be to use an existing
6196 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6197 could share abbrev tables. */
6199 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6200 0 /* abbrev_table_provided */,
6201 NULL
/* stub_comp_unit_die */,
6202 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6204 &comp_unit_die
, &has_children
) == 0)
6207 do_cleanups (cleanups
);
6211 /* All the "real" work is done here. */
6212 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6214 /* This duplicates the code in init_cutu_and_read_dies,
6215 but the alternative is making the latter more complex.
6216 This function is only for the special case of using DWO files directly:
6217 no point in overly complicating the general case just to handle this. */
6218 if (free_cu_cleanup
!= NULL
)
6222 /* We've successfully allocated this compilation unit. Let our
6223 caller clean it up when finished with it. */
6224 discard_cleanups (free_cu_cleanup
);
6226 /* We can only discard free_cu_cleanup and all subsequent cleanups.
6227 So we have to manually free the abbrev table. */
6228 dwarf2_free_abbrev_table (cu
);
6230 /* Link this CU into read_in_chain. */
6231 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6232 dwarf2_per_objfile
->read_in_chain
= this_cu
;
6235 do_cleanups (free_cu_cleanup
);
6238 do_cleanups (cleanups
);
6241 /* Initialize a CU (or TU) and read its DIEs.
6242 If the CU defers to a DWO file, read the DWO file as well.
6244 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6245 Otherwise the table specified in the comp unit header is read in and used.
6246 This is an optimization for when we already have the abbrev table.
6248 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6249 Otherwise, a new CU is allocated with xmalloc.
6251 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
6252 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
6254 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
6255 linker) then DIE_READER_FUNC will not get called. */
6258 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
6259 struct abbrev_table
*abbrev_table
,
6260 int use_existing_cu
, int keep
,
6261 die_reader_func_ftype
*die_reader_func
,
6264 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6265 struct dwarf2_section_info
*section
= this_cu
->section
;
6266 bfd
*abfd
= get_section_bfd_owner (section
);
6267 struct dwarf2_cu
*cu
;
6268 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6269 struct die_reader_specs reader
;
6270 struct die_info
*comp_unit_die
;
6272 struct attribute
*attr
;
6273 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
6274 struct signatured_type
*sig_type
= NULL
;
6275 struct dwarf2_section_info
*abbrev_section
;
6276 /* Non-zero if CU currently points to a DWO file and we need to
6277 reread it. When this happens we need to reread the skeleton die
6278 before we can reread the DWO file (this only applies to CUs, not TUs). */
6279 int rereading_dwo_cu
= 0;
6281 if (dwarf_die_debug
)
6282 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
6283 this_cu
->is_debug_types
? "type" : "comp",
6284 to_underlying (this_cu
->sect_off
));
6286 if (use_existing_cu
)
6289 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6290 file (instead of going through the stub), short-circuit all of this. */
6291 if (this_cu
->reading_dwo_directly
)
6293 /* Narrow down the scope of possibilities to have to understand. */
6294 gdb_assert (this_cu
->is_debug_types
);
6295 gdb_assert (abbrev_table
== NULL
);
6296 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
6297 die_reader_func
, data
);
6301 cleanups
= make_cleanup (null_cleanup
, NULL
);
6303 /* This is cheap if the section is already read in. */
6304 dwarf2_read_section (objfile
, section
);
6306 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6308 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
6310 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6313 /* If this CU is from a DWO file we need to start over, we need to
6314 refetch the attributes from the skeleton CU.
6315 This could be optimized by retrieving those attributes from when we
6316 were here the first time: the previous comp_unit_die was stored in
6317 comp_unit_obstack. But there's no data yet that we need this
6319 if (cu
->dwo_unit
!= NULL
)
6320 rereading_dwo_cu
= 1;
6324 /* If !use_existing_cu, this_cu->cu must be NULL. */
6325 gdb_assert (this_cu
->cu
== NULL
);
6326 cu
= XNEW (struct dwarf2_cu
);
6327 init_one_comp_unit (cu
, this_cu
);
6328 /* If an error occurs while loading, release our storage. */
6329 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
6332 /* Get the header. */
6333 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
6335 /* We already have the header, there's no need to read it in again. */
6336 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
6340 if (this_cu
->is_debug_types
)
6342 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6343 abbrev_section
, info_ptr
,
6346 /* Since per_cu is the first member of struct signatured_type,
6347 we can go from a pointer to one to a pointer to the other. */
6348 sig_type
= (struct signatured_type
*) this_cu
;
6349 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
6350 gdb_assert (sig_type
->type_offset_in_tu
6351 == cu
->header
.type_cu_offset_in_tu
);
6352 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6354 /* LENGTH has not been set yet for type units if we're
6355 using .gdb_index. */
6356 this_cu
->length
= get_cu_length (&cu
->header
);
6358 /* Establish the type offset that can be used to lookup the type. */
6359 sig_type
->type_offset_in_section
=
6360 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
6362 this_cu
->dwarf_version
= cu
->header
.version
;
6366 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
6369 rcuh_kind::COMPILE
);
6371 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
6372 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
6373 this_cu
->dwarf_version
= cu
->header
.version
;
6377 /* Skip dummy compilation units. */
6378 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6379 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6381 do_cleanups (cleanups
);
6385 /* If we don't have them yet, read the abbrevs for this compilation unit.
6386 And if we need to read them now, make sure they're freed when we're
6387 done. Note that it's important that if the CU had an abbrev table
6388 on entry we don't free it when we're done: Somewhere up the call stack
6389 it may be in use. */
6390 if (abbrev_table
!= NULL
)
6392 gdb_assert (cu
->abbrev_table
== NULL
);
6393 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
6394 cu
->abbrev_table
= abbrev_table
;
6396 else if (cu
->abbrev_table
== NULL
)
6398 dwarf2_read_abbrevs (cu
, abbrev_section
);
6399 make_cleanup (dwarf2_free_abbrev_table
, cu
);
6401 else if (rereading_dwo_cu
)
6403 dwarf2_free_abbrev_table (cu
);
6404 dwarf2_read_abbrevs (cu
, abbrev_section
);
6407 /* Read the top level CU/TU die. */
6408 init_cu_die_reader (&reader
, cu
, section
, NULL
);
6409 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
6411 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
6413 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
6414 DWO CU, that this test will fail (the attribute will not be present). */
6415 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
6418 struct dwo_unit
*dwo_unit
;
6419 struct die_info
*dwo_comp_unit_die
;
6423 complaint (&symfile_complaints
,
6424 _("compilation unit with DW_AT_GNU_dwo_name"
6425 " has children (offset 0x%x) [in module %s]"),
6426 to_underlying (this_cu
->sect_off
), bfd_get_filename (abfd
));
6428 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
6429 if (dwo_unit
!= NULL
)
6431 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
6432 abbrev_table
!= NULL
,
6433 comp_unit_die
, NULL
,
6435 &dwo_comp_unit_die
, &has_children
) == 0)
6438 do_cleanups (cleanups
);
6441 comp_unit_die
= dwo_comp_unit_die
;
6445 /* Yikes, we couldn't find the rest of the DIE, we only have
6446 the stub. A complaint has already been logged. There's
6447 not much more we can do except pass on the stub DIE to
6448 die_reader_func. We don't want to throw an error on bad
6453 /* All of the above is setup for this call. Yikes. */
6454 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6456 /* Done, clean up. */
6457 if (free_cu_cleanup
!= NULL
)
6461 /* We've successfully allocated this compilation unit. Let our
6462 caller clean it up when finished with it. */
6463 discard_cleanups (free_cu_cleanup
);
6465 /* We can only discard free_cu_cleanup and all subsequent cleanups.
6466 So we have to manually free the abbrev table. */
6467 dwarf2_free_abbrev_table (cu
);
6469 /* Link this CU into read_in_chain. */
6470 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6471 dwarf2_per_objfile
->read_in_chain
= this_cu
;
6474 do_cleanups (free_cu_cleanup
);
6477 do_cleanups (cleanups
);
6480 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
6481 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
6482 to have already done the lookup to find the DWO file).
6484 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
6485 THIS_CU->is_debug_types, but nothing else.
6487 We fill in THIS_CU->length.
6489 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
6490 linker) then DIE_READER_FUNC will not get called.
6492 THIS_CU->cu is always freed when done.
6493 This is done in order to not leave THIS_CU->cu in a state where we have
6494 to care whether it refers to the "main" CU or the DWO CU. */
6497 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
6498 struct dwo_file
*dwo_file
,
6499 die_reader_func_ftype
*die_reader_func
,
6502 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6503 struct dwarf2_section_info
*section
= this_cu
->section
;
6504 bfd
*abfd
= get_section_bfd_owner (section
);
6505 struct dwarf2_section_info
*abbrev_section
;
6506 struct dwarf2_cu cu
;
6507 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6508 struct die_reader_specs reader
;
6509 struct cleanup
*cleanups
;
6510 struct die_info
*comp_unit_die
;
6513 if (dwarf_die_debug
)
6514 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
6515 this_cu
->is_debug_types
? "type" : "comp",
6516 to_underlying (this_cu
->sect_off
));
6518 gdb_assert (this_cu
->cu
== NULL
);
6520 abbrev_section
= (dwo_file
!= NULL
6521 ? &dwo_file
->sections
.abbrev
6522 : get_abbrev_section_for_cu (this_cu
));
6524 /* This is cheap if the section is already read in. */
6525 dwarf2_read_section (objfile
, section
);
6527 init_one_comp_unit (&cu
, this_cu
);
6529 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
6531 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
6532 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
6533 abbrev_section
, info_ptr
,
6534 (this_cu
->is_debug_types
6536 : rcuh_kind::COMPILE
));
6538 this_cu
->length
= get_cu_length (&cu
.header
);
6540 /* Skip dummy compilation units. */
6541 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
6542 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6544 do_cleanups (cleanups
);
6548 dwarf2_read_abbrevs (&cu
, abbrev_section
);
6549 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
6551 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
6552 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
6554 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
6556 do_cleanups (cleanups
);
6559 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
6560 does not lookup the specified DWO file.
6561 This cannot be used to read DWO files.
6563 THIS_CU->cu is always freed when done.
6564 This is done in order to not leave THIS_CU->cu in a state where we have
6565 to care whether it refers to the "main" CU or the DWO CU.
6566 We can revisit this if the data shows there's a performance issue. */
6569 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
6570 die_reader_func_ftype
*die_reader_func
,
6573 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
6576 /* Type Unit Groups.
6578 Type Unit Groups are a way to collapse the set of all TUs (type units) into
6579 a more manageable set. The grouping is done by DW_AT_stmt_list entry
6580 so that all types coming from the same compilation (.o file) are grouped
6581 together. A future step could be to put the types in the same symtab as
6582 the CU the types ultimately came from. */
6585 hash_type_unit_group (const void *item
)
6587 const struct type_unit_group
*tu_group
6588 = (const struct type_unit_group
*) item
;
6590 return hash_stmt_list_entry (&tu_group
->hash
);
6594 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
6596 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
6597 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
6599 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
6602 /* Allocate a hash table for type unit groups. */
6605 allocate_type_unit_groups_table (void)
6607 return htab_create_alloc_ex (3,
6608 hash_type_unit_group
,
6611 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
6612 hashtab_obstack_allocate
,
6613 dummy_obstack_deallocate
);
6616 /* Type units that don't have DW_AT_stmt_list are grouped into their own
6617 partial symtabs. We combine several TUs per psymtab to not let the size
6618 of any one psymtab grow too big. */
6619 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
6620 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
6622 /* Helper routine for get_type_unit_group.
6623 Create the type_unit_group object used to hold one or more TUs. */
6625 static struct type_unit_group
*
6626 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
6628 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6629 struct dwarf2_per_cu_data
*per_cu
;
6630 struct type_unit_group
*tu_group
;
6632 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6633 struct type_unit_group
);
6634 per_cu
= &tu_group
->per_cu
;
6635 per_cu
->objfile
= objfile
;
6637 if (dwarf2_per_objfile
->using_index
)
6639 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6640 struct dwarf2_per_cu_quick_data
);
6644 unsigned int line_offset
= to_underlying (line_offset_struct
);
6645 struct partial_symtab
*pst
;
6648 /* Give the symtab a useful name for debug purposes. */
6649 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
6650 name
= xstrprintf ("<type_units_%d>",
6651 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
6653 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
6655 pst
= create_partial_symtab (per_cu
, name
);
6661 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
6662 tu_group
->hash
.line_sect_off
= line_offset_struct
;
6667 /* Look up the type_unit_group for type unit CU, and create it if necessary.
6668 STMT_LIST is a DW_AT_stmt_list attribute. */
6670 static struct type_unit_group
*
6671 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
6673 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6674 struct type_unit_group
*tu_group
;
6676 unsigned int line_offset
;
6677 struct type_unit_group type_unit_group_for_lookup
;
6679 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
6681 dwarf2_per_objfile
->type_unit_groups
=
6682 allocate_type_unit_groups_table ();
6685 /* Do we need to create a new group, or can we use an existing one? */
6689 line_offset
= DW_UNSND (stmt_list
);
6690 ++tu_stats
->nr_symtab_sharers
;
6694 /* Ugh, no stmt_list. Rare, but we have to handle it.
6695 We can do various things here like create one group per TU or
6696 spread them over multiple groups to split up the expansion work.
6697 To avoid worst case scenarios (too many groups or too large groups)
6698 we, umm, group them in bunches. */
6699 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
6700 | (tu_stats
->nr_stmt_less_type_units
6701 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
6702 ++tu_stats
->nr_stmt_less_type_units
;
6705 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
6706 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
6707 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
6708 &type_unit_group_for_lookup
, INSERT
);
6711 tu_group
= (struct type_unit_group
*) *slot
;
6712 gdb_assert (tu_group
!= NULL
);
6716 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
6717 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
6719 ++tu_stats
->nr_symtabs
;
6725 /* Partial symbol tables. */
6727 /* Create a psymtab named NAME and assign it to PER_CU.
6729 The caller must fill in the following details:
6730 dirname, textlow, texthigh. */
6732 static struct partial_symtab
*
6733 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
6735 struct objfile
*objfile
= per_cu
->objfile
;
6736 struct partial_symtab
*pst
;
6738 pst
= start_psymtab_common (objfile
, name
, 0,
6739 objfile
->global_psymbols
,
6740 objfile
->static_psymbols
);
6742 pst
->psymtabs_addrmap_supported
= 1;
6744 /* This is the glue that links PST into GDB's symbol API. */
6745 pst
->read_symtab_private
= per_cu
;
6746 pst
->read_symtab
= dwarf2_read_symtab
;
6747 per_cu
->v
.psymtab
= pst
;
6752 /* The DATA object passed to process_psymtab_comp_unit_reader has this
6755 struct process_psymtab_comp_unit_data
6757 /* True if we are reading a DW_TAG_partial_unit. */
6759 int want_partial_unit
;
6761 /* The "pretend" language that is used if the CU doesn't declare a
6764 enum language pretend_language
;
6767 /* die_reader_func for process_psymtab_comp_unit. */
6770 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
6771 const gdb_byte
*info_ptr
,
6772 struct die_info
*comp_unit_die
,
6776 struct dwarf2_cu
*cu
= reader
->cu
;
6777 struct objfile
*objfile
= cu
->objfile
;
6778 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6779 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6781 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
6782 struct partial_symtab
*pst
;
6783 enum pc_bounds_kind cu_bounds_kind
;
6784 const char *filename
;
6785 struct process_psymtab_comp_unit_data
*info
6786 = (struct process_psymtab_comp_unit_data
*) data
;
6788 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
6791 gdb_assert (! per_cu
->is_debug_types
);
6793 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
6795 cu
->list_in_scope
= &file_symbols
;
6797 /* Allocate a new partial symbol table structure. */
6798 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
6799 if (filename
== NULL
)
6802 pst
= create_partial_symtab (per_cu
, filename
);
6804 /* This must be done before calling dwarf2_build_include_psymtabs. */
6805 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6807 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6809 dwarf2_find_base_address (comp_unit_die
, cu
);
6811 /* Possibly set the default values of LOWPC and HIGHPC from
6813 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
6814 &best_highpc
, cu
, pst
);
6815 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
6816 /* Store the contiguous range if it is not empty; it can be empty for
6817 CUs with no code. */
6818 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6819 gdbarch_adjust_dwarf2_addr (gdbarch
,
6820 best_lowpc
+ baseaddr
),
6821 gdbarch_adjust_dwarf2_addr (gdbarch
,
6822 best_highpc
+ baseaddr
) - 1,
6825 /* Check if comp unit has_children.
6826 If so, read the rest of the partial symbols from this comp unit.
6827 If not, there's no more debug_info for this comp unit. */
6830 struct partial_die_info
*first_die
;
6831 CORE_ADDR lowpc
, highpc
;
6833 lowpc
= ((CORE_ADDR
) -1);
6834 highpc
= ((CORE_ADDR
) 0);
6836 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6838 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6839 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6841 /* If we didn't find a lowpc, set it to highpc to avoid
6842 complaints from `maint check'. */
6843 if (lowpc
== ((CORE_ADDR
) -1))
6846 /* If the compilation unit didn't have an explicit address range,
6847 then use the information extracted from its child dies. */
6848 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6851 best_highpc
= highpc
;
6854 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6855 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6857 end_psymtab_common (objfile
, pst
);
6859 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6862 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6863 struct dwarf2_per_cu_data
*iter
;
6865 /* Fill in 'dependencies' here; we fill in 'users' in a
6867 pst
->number_of_dependencies
= len
;
6869 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6871 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6874 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6876 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6879 /* Get the list of files included in the current compilation unit,
6880 and build a psymtab for each of them. */
6881 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6883 if (dwarf_read_debug
)
6885 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6887 fprintf_unfiltered (gdb_stdlog
,
6888 "Psymtab for %s unit @0x%x: %s - %s"
6889 ", %d global, %d static syms\n",
6890 per_cu
->is_debug_types
? "type" : "comp",
6891 to_underlying (per_cu
->sect_off
),
6892 paddress (gdbarch
, pst
->textlow
),
6893 paddress (gdbarch
, pst
->texthigh
),
6894 pst
->n_global_syms
, pst
->n_static_syms
);
6898 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6899 Process compilation unit THIS_CU for a psymtab. */
6902 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6903 int want_partial_unit
,
6904 enum language pretend_language
)
6906 /* If this compilation unit was already read in, free the
6907 cached copy in order to read it in again. This is
6908 necessary because we skipped some symbols when we first
6909 read in the compilation unit (see load_partial_dies).
6910 This problem could be avoided, but the benefit is unclear. */
6911 if (this_cu
->cu
!= NULL
)
6912 free_one_cached_comp_unit (this_cu
);
6914 if (this_cu
->is_debug_types
)
6915 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
6919 process_psymtab_comp_unit_data info
;
6920 info
.want_partial_unit
= want_partial_unit
;
6921 info
.pretend_language
= pretend_language
;
6922 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6923 process_psymtab_comp_unit_reader
, &info
);
6926 /* Age out any secondary CUs. */
6927 age_cached_comp_units ();
6930 /* Reader function for build_type_psymtabs. */
6933 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6934 const gdb_byte
*info_ptr
,
6935 struct die_info
*type_unit_die
,
6939 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6940 struct dwarf2_cu
*cu
= reader
->cu
;
6941 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6942 struct signatured_type
*sig_type
;
6943 struct type_unit_group
*tu_group
;
6944 struct attribute
*attr
;
6945 struct partial_die_info
*first_die
;
6946 CORE_ADDR lowpc
, highpc
;
6947 struct partial_symtab
*pst
;
6949 gdb_assert (data
== NULL
);
6950 gdb_assert (per_cu
->is_debug_types
);
6951 sig_type
= (struct signatured_type
*) per_cu
;
6956 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6957 tu_group
= get_type_unit_group (cu
, attr
);
6959 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6961 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6962 cu
->list_in_scope
= &file_symbols
;
6963 pst
= create_partial_symtab (per_cu
, "");
6966 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6968 lowpc
= (CORE_ADDR
) -1;
6969 highpc
= (CORE_ADDR
) 0;
6970 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6972 end_psymtab_common (objfile
, pst
);
6975 /* Struct used to sort TUs by their abbreviation table offset. */
6977 struct tu_abbrev_offset
6979 struct signatured_type
*sig_type
;
6980 sect_offset abbrev_offset
;
6983 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6986 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6988 const struct tu_abbrev_offset
* const *a
6989 = (const struct tu_abbrev_offset
* const*) ap
;
6990 const struct tu_abbrev_offset
* const *b
6991 = (const struct tu_abbrev_offset
* const*) bp
;
6992 sect_offset aoff
= (*a
)->abbrev_offset
;
6993 sect_offset boff
= (*b
)->abbrev_offset
;
6995 return (aoff
> boff
) - (aoff
< boff
);
6998 /* Efficiently read all the type units.
6999 This does the bulk of the work for build_type_psymtabs.
7001 The efficiency is because we sort TUs by the abbrev table they use and
7002 only read each abbrev table once. In one program there are 200K TUs
7003 sharing 8K abbrev tables.
7005 The main purpose of this function is to support building the
7006 dwarf2_per_objfile->type_unit_groups table.
7007 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7008 can collapse the search space by grouping them by stmt_list.
7009 The savings can be significant, in the same program from above the 200K TUs
7010 share 8K stmt_list tables.
7012 FUNC is expected to call get_type_unit_group, which will create the
7013 struct type_unit_group if necessary and add it to
7014 dwarf2_per_objfile->type_unit_groups. */
7017 build_type_psymtabs_1 (void)
7019 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7020 struct cleanup
*cleanups
;
7021 struct abbrev_table
*abbrev_table
;
7022 sect_offset abbrev_offset
;
7023 struct tu_abbrev_offset
*sorted_by_abbrev
;
7026 /* It's up to the caller to not call us multiple times. */
7027 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
7029 if (dwarf2_per_objfile
->n_type_units
== 0)
7032 /* TUs typically share abbrev tables, and there can be way more TUs than
7033 abbrev tables. Sort by abbrev table to reduce the number of times we
7034 read each abbrev table in.
7035 Alternatives are to punt or to maintain a cache of abbrev tables.
7036 This is simpler and efficient enough for now.
7038 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7039 symtab to use). Typically TUs with the same abbrev offset have the same
7040 stmt_list value too so in practice this should work well.
7042 The basic algorithm here is:
7044 sort TUs by abbrev table
7045 for each TU with same abbrev table:
7046 read abbrev table if first user
7047 read TU top level DIE
7048 [IWBN if DWO skeletons had DW_AT_stmt_list]
7051 if (dwarf_read_debug
)
7052 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7054 /* Sort in a separate table to maintain the order of all_type_units
7055 for .gdb_index: TU indices directly index all_type_units. */
7056 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
7057 dwarf2_per_objfile
->n_type_units
);
7058 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
7060 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
7062 sorted_by_abbrev
[i
].sig_type
= sig_type
;
7063 sorted_by_abbrev
[i
].abbrev_offset
=
7064 read_abbrev_offset (sig_type
->per_cu
.section
,
7065 sig_type
->per_cu
.sect_off
);
7067 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
7068 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
7069 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
7071 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7072 abbrev_table
= NULL
;
7073 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
7075 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
7077 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
7079 /* Switch to the next abbrev table if necessary. */
7080 if (abbrev_table
== NULL
7081 || tu
->abbrev_offset
!= abbrev_offset
)
7083 if (abbrev_table
!= NULL
)
7085 abbrev_table_free (abbrev_table
);
7086 /* Reset to NULL in case abbrev_table_read_table throws
7087 an error: abbrev_table_free_cleanup will get called. */
7088 abbrev_table
= NULL
;
7090 abbrev_offset
= tu
->abbrev_offset
;
7092 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
7094 ++tu_stats
->nr_uniq_abbrev_tables
;
7097 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
7098 build_type_psymtabs_reader
, NULL
);
7101 do_cleanups (cleanups
);
7104 /* Print collected type unit statistics. */
7107 print_tu_stats (void)
7109 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7111 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7112 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
7113 dwarf2_per_objfile
->n_type_units
);
7114 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7115 tu_stats
->nr_uniq_abbrev_tables
);
7116 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7117 tu_stats
->nr_symtabs
);
7118 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7119 tu_stats
->nr_symtab_sharers
);
7120 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7121 tu_stats
->nr_stmt_less_type_units
);
7122 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7123 tu_stats
->nr_all_type_units_reallocs
);
7126 /* Traversal function for build_type_psymtabs. */
7129 build_type_psymtab_dependencies (void **slot
, void *info
)
7131 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7132 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7133 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7134 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7135 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
7136 struct signatured_type
*iter
;
7139 gdb_assert (len
> 0);
7140 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
7142 pst
->number_of_dependencies
= len
;
7144 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
7146 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
7149 gdb_assert (iter
->per_cu
.is_debug_types
);
7150 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7151 iter
->type_unit_group
= tu_group
;
7154 VEC_free (sig_type_ptr
, tu_group
->tus
);
7159 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7160 Build partial symbol tables for the .debug_types comp-units. */
7163 build_type_psymtabs (struct objfile
*objfile
)
7165 if (! create_all_type_units (objfile
))
7168 build_type_psymtabs_1 ();
7171 /* Traversal function for process_skeletonless_type_unit.
7172 Read a TU in a DWO file and build partial symbols for it. */
7175 process_skeletonless_type_unit (void **slot
, void *info
)
7177 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7178 struct objfile
*objfile
= (struct objfile
*) info
;
7179 struct signatured_type find_entry
, *entry
;
7181 /* If this TU doesn't exist in the global table, add it and read it in. */
7183 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7185 dwarf2_per_objfile
->signatured_types
7186 = allocate_signatured_type_table (objfile
);
7189 find_entry
.signature
= dwo_unit
->signature
;
7190 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
7192 /* If we've already seen this type there's nothing to do. What's happening
7193 is we're doing our own version of comdat-folding here. */
7197 /* This does the job that create_all_type_units would have done for
7199 entry
= add_type_unit (dwo_unit
->signature
, slot
);
7200 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
7203 /* This does the job that build_type_psymtabs_1 would have done. */
7204 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
7205 build_type_psymtabs_reader
, NULL
);
7210 /* Traversal function for process_skeletonless_type_units. */
7213 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7215 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7217 if (dwo_file
->tus
!= NULL
)
7219 htab_traverse_noresize (dwo_file
->tus
,
7220 process_skeletonless_type_unit
, info
);
7226 /* Scan all TUs of DWO files, verifying we've processed them.
7227 This is needed in case a TU was emitted without its skeleton.
7228 Note: This can't be done until we know what all the DWO files are. */
7231 process_skeletonless_type_units (struct objfile
*objfile
)
7233 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7234 if (get_dwp_file () == NULL
7235 && dwarf2_per_objfile
->dwo_files
!= NULL
)
7237 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
7238 process_dwo_file_for_skeletonless_type_units
,
7243 /* Compute the 'user' field for each psymtab in OBJFILE. */
7246 set_partial_user (struct objfile
*objfile
)
7250 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
7252 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
7253 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
7259 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7261 /* Set the 'user' field only if it is not already set. */
7262 if (pst
->dependencies
[j
]->user
== NULL
)
7263 pst
->dependencies
[j
]->user
= pst
;
7268 /* Build the partial symbol table by doing a quick pass through the
7269 .debug_info and .debug_abbrev sections. */
7272 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
7274 struct cleanup
*back_to
;
7277 if (dwarf_read_debug
)
7279 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7280 objfile_name (objfile
));
7283 dwarf2_per_objfile
->reading_partial_symbols
= 1;
7285 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
7287 /* Any cached compilation units will be linked by the per-objfile
7288 read_in_chain. Make sure to free them when we're done. */
7289 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
7291 build_type_psymtabs (objfile
);
7293 create_all_comp_units (objfile
);
7295 /* Create a temporary address map on a temporary obstack. We later
7296 copy this to the final obstack. */
7297 auto_obstack temp_obstack
;
7299 scoped_restore save_psymtabs_addrmap
7300 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
7301 addrmap_create_mutable (&temp_obstack
));
7303 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
7305 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
7307 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
7310 /* This has to wait until we read the CUs, we need the list of DWOs. */
7311 process_skeletonless_type_units (objfile
);
7313 /* Now that all TUs have been processed we can fill in the dependencies. */
7314 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
7316 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
7317 build_type_psymtab_dependencies
, NULL
);
7320 if (dwarf_read_debug
)
7323 set_partial_user (objfile
);
7325 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
7326 &objfile
->objfile_obstack
);
7327 /* At this point we want to keep the address map. */
7328 save_psymtabs_addrmap
.release ();
7330 do_cleanups (back_to
);
7332 if (dwarf_read_debug
)
7333 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7334 objfile_name (objfile
));
7337 /* die_reader_func for load_partial_comp_unit. */
7340 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
7341 const gdb_byte
*info_ptr
,
7342 struct die_info
*comp_unit_die
,
7346 struct dwarf2_cu
*cu
= reader
->cu
;
7348 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
7350 /* Check if comp unit has_children.
7351 If so, read the rest of the partial symbols from this comp unit.
7352 If not, there's no more debug_info for this comp unit. */
7354 load_partial_dies (reader
, info_ptr
, 0);
7357 /* Load the partial DIEs for a secondary CU into memory.
7358 This is also used when rereading a primary CU with load_all_dies. */
7361 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
7363 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7364 load_partial_comp_unit_reader
, NULL
);
7368 read_comp_units_from_section (struct objfile
*objfile
,
7369 struct dwarf2_section_info
*section
,
7370 struct dwarf2_section_info
*abbrev_section
,
7371 unsigned int is_dwz
,
7374 struct dwarf2_per_cu_data
***all_comp_units
)
7376 const gdb_byte
*info_ptr
;
7377 bfd
*abfd
= get_section_bfd_owner (section
);
7379 if (dwarf_read_debug
)
7380 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
7381 get_section_name (section
),
7382 get_section_file_name (section
));
7384 dwarf2_read_section (objfile
, section
);
7386 info_ptr
= section
->buffer
;
7388 while (info_ptr
< section
->buffer
+ section
->size
)
7390 struct dwarf2_per_cu_data
*this_cu
;
7392 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
7394 comp_unit_head cu_header
;
7395 read_and_check_comp_unit_head (&cu_header
, section
, abbrev_section
,
7396 info_ptr
, rcuh_kind::COMPILE
);
7398 /* Save the compilation unit for later lookup. */
7399 if (cu_header
.unit_type
!= DW_UT_type
)
7401 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
7402 struct dwarf2_per_cu_data
);
7403 memset (this_cu
, 0, sizeof (*this_cu
));
7407 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
7408 struct signatured_type
);
7409 memset (sig_type
, 0, sizeof (*sig_type
));
7410 sig_type
->signature
= cu_header
.signature
;
7411 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
7412 this_cu
= &sig_type
->per_cu
;
7414 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
7415 this_cu
->sect_off
= sect_off
;
7416 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
7417 this_cu
->is_dwz
= is_dwz
;
7418 this_cu
->objfile
= objfile
;
7419 this_cu
->section
= section
;
7421 if (*n_comp_units
== *n_allocated
)
7424 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
7425 *all_comp_units
, *n_allocated
);
7427 (*all_comp_units
)[*n_comp_units
] = this_cu
;
7430 info_ptr
= info_ptr
+ this_cu
->length
;
7434 /* Create a list of all compilation units in OBJFILE.
7435 This is only done for -readnow and building partial symtabs. */
7438 create_all_comp_units (struct objfile
*objfile
)
7442 struct dwarf2_per_cu_data
**all_comp_units
;
7443 struct dwz_file
*dwz
;
7447 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
7449 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
,
7450 &dwarf2_per_objfile
->abbrev
, 0,
7451 &n_allocated
, &n_comp_units
, &all_comp_units
);
7453 dwz
= dwarf2_get_dwz_file ();
7455 read_comp_units_from_section (objfile
, &dwz
->info
, &dwz
->abbrev
, 1,
7456 &n_allocated
, &n_comp_units
,
7459 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
7460 struct dwarf2_per_cu_data
*,
7462 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
7463 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
7464 xfree (all_comp_units
);
7465 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
7468 /* Process all loaded DIEs for compilation unit CU, starting at
7469 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
7470 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
7471 DW_AT_ranges). See the comments of add_partial_subprogram on how
7472 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
7475 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
7476 CORE_ADDR
*highpc
, int set_addrmap
,
7477 struct dwarf2_cu
*cu
)
7479 struct partial_die_info
*pdi
;
7481 /* Now, march along the PDI's, descending into ones which have
7482 interesting children but skipping the children of the other ones,
7483 until we reach the end of the compilation unit. */
7489 fixup_partial_die (pdi
, cu
);
7491 /* Anonymous namespaces or modules have no name but have interesting
7492 children, so we need to look at them. Ditto for anonymous
7495 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
7496 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
7497 || pdi
->tag
== DW_TAG_imported_unit
)
7501 case DW_TAG_subprogram
:
7502 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7504 case DW_TAG_constant
:
7505 case DW_TAG_variable
:
7506 case DW_TAG_typedef
:
7507 case DW_TAG_union_type
:
7508 if (!pdi
->is_declaration
)
7510 add_partial_symbol (pdi
, cu
);
7513 case DW_TAG_class_type
:
7514 case DW_TAG_interface_type
:
7515 case DW_TAG_structure_type
:
7516 if (!pdi
->is_declaration
)
7518 add_partial_symbol (pdi
, cu
);
7520 if (cu
->language
== language_rust
&& pdi
->has_children
)
7521 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
7524 case DW_TAG_enumeration_type
:
7525 if (!pdi
->is_declaration
)
7526 add_partial_enumeration (pdi
, cu
);
7528 case DW_TAG_base_type
:
7529 case DW_TAG_subrange_type
:
7530 /* File scope base type definitions are added to the partial
7532 add_partial_symbol (pdi
, cu
);
7534 case DW_TAG_namespace
:
7535 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7538 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7540 case DW_TAG_imported_unit
:
7542 struct dwarf2_per_cu_data
*per_cu
;
7544 /* For now we don't handle imported units in type units. */
7545 if (cu
->per_cu
->is_debug_types
)
7547 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7548 " supported in type units [in module %s]"),
7549 objfile_name (cu
->objfile
));
7552 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.sect_off
,
7556 /* Go read the partial unit, if needed. */
7557 if (per_cu
->v
.psymtab
== NULL
)
7558 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
7560 VEC_safe_push (dwarf2_per_cu_ptr
,
7561 cu
->per_cu
->imported_symtabs
, per_cu
);
7564 case DW_TAG_imported_declaration
:
7565 add_partial_symbol (pdi
, cu
);
7572 /* If the die has a sibling, skip to the sibling. */
7574 pdi
= pdi
->die_sibling
;
7578 /* Functions used to compute the fully scoped name of a partial DIE.
7580 Normally, this is simple. For C++, the parent DIE's fully scoped
7581 name is concatenated with "::" and the partial DIE's name.
7582 Enumerators are an exception; they use the scope of their parent
7583 enumeration type, i.e. the name of the enumeration type is not
7584 prepended to the enumerator.
7586 There are two complexities. One is DW_AT_specification; in this
7587 case "parent" means the parent of the target of the specification,
7588 instead of the direct parent of the DIE. The other is compilers
7589 which do not emit DW_TAG_namespace; in this case we try to guess
7590 the fully qualified name of structure types from their members'
7591 linkage names. This must be done using the DIE's children rather
7592 than the children of any DW_AT_specification target. We only need
7593 to do this for structures at the top level, i.e. if the target of
7594 any DW_AT_specification (if any; otherwise the DIE itself) does not
7597 /* Compute the scope prefix associated with PDI's parent, in
7598 compilation unit CU. The result will be allocated on CU's
7599 comp_unit_obstack, or a copy of the already allocated PDI->NAME
7600 field. NULL is returned if no prefix is necessary. */
7602 partial_die_parent_scope (struct partial_die_info
*pdi
,
7603 struct dwarf2_cu
*cu
)
7605 const char *grandparent_scope
;
7606 struct partial_die_info
*parent
, *real_pdi
;
7608 /* We need to look at our parent DIE; if we have a DW_AT_specification,
7609 then this means the parent of the specification DIE. */
7612 while (real_pdi
->has_specification
)
7613 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
7614 real_pdi
->spec_is_dwz
, cu
);
7616 parent
= real_pdi
->die_parent
;
7620 if (parent
->scope_set
)
7621 return parent
->scope
;
7623 fixup_partial_die (parent
, cu
);
7625 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
7627 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
7628 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
7629 Work around this problem here. */
7630 if (cu
->language
== language_cplus
7631 && parent
->tag
== DW_TAG_namespace
7632 && strcmp (parent
->name
, "::") == 0
7633 && grandparent_scope
== NULL
)
7635 parent
->scope
= NULL
;
7636 parent
->scope_set
= 1;
7640 if (pdi
->tag
== DW_TAG_enumerator
)
7641 /* Enumerators should not get the name of the enumeration as a prefix. */
7642 parent
->scope
= grandparent_scope
;
7643 else if (parent
->tag
== DW_TAG_namespace
7644 || parent
->tag
== DW_TAG_module
7645 || parent
->tag
== DW_TAG_structure_type
7646 || parent
->tag
== DW_TAG_class_type
7647 || parent
->tag
== DW_TAG_interface_type
7648 || parent
->tag
== DW_TAG_union_type
7649 || parent
->tag
== DW_TAG_enumeration_type
)
7651 if (grandparent_scope
== NULL
)
7652 parent
->scope
= parent
->name
;
7654 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
7656 parent
->name
, 0, cu
);
7660 /* FIXME drow/2004-04-01: What should we be doing with
7661 function-local names? For partial symbols, we should probably be
7663 complaint (&symfile_complaints
,
7664 _("unhandled containing DIE tag %d for DIE at %d"),
7665 parent
->tag
, to_underlying (pdi
->sect_off
));
7666 parent
->scope
= grandparent_scope
;
7669 parent
->scope_set
= 1;
7670 return parent
->scope
;
7673 /* Return the fully scoped name associated with PDI, from compilation unit
7674 CU. The result will be allocated with malloc. */
7677 partial_die_full_name (struct partial_die_info
*pdi
,
7678 struct dwarf2_cu
*cu
)
7680 const char *parent_scope
;
7682 /* If this is a template instantiation, we can not work out the
7683 template arguments from partial DIEs. So, unfortunately, we have
7684 to go through the full DIEs. At least any work we do building
7685 types here will be reused if full symbols are loaded later. */
7686 if (pdi
->has_template_arguments
)
7688 fixup_partial_die (pdi
, cu
);
7690 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
7692 struct die_info
*die
;
7693 struct attribute attr
;
7694 struct dwarf2_cu
*ref_cu
= cu
;
7696 /* DW_FORM_ref_addr is using section offset. */
7697 attr
.name
= (enum dwarf_attribute
) 0;
7698 attr
.form
= DW_FORM_ref_addr
;
7699 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
7700 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
7702 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
7706 parent_scope
= partial_die_parent_scope (pdi
, cu
);
7707 if (parent_scope
== NULL
)
7710 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
7714 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
7716 struct objfile
*objfile
= cu
->objfile
;
7717 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7719 const char *actual_name
= NULL
;
7721 char *built_actual_name
;
7723 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7725 built_actual_name
= partial_die_full_name (pdi
, cu
);
7726 if (built_actual_name
!= NULL
)
7727 actual_name
= built_actual_name
;
7729 if (actual_name
== NULL
)
7730 actual_name
= pdi
->name
;
7734 case DW_TAG_subprogram
:
7735 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
7736 if (pdi
->is_external
|| cu
->language
== language_ada
)
7738 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
7739 of the global scope. But in Ada, we want to be able to access
7740 nested procedures globally. So all Ada subprograms are stored
7741 in the global scope. */
7742 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7743 built_actual_name
!= NULL
,
7744 VAR_DOMAIN
, LOC_BLOCK
,
7745 &objfile
->global_psymbols
,
7746 addr
, cu
->language
, objfile
);
7750 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7751 built_actual_name
!= NULL
,
7752 VAR_DOMAIN
, LOC_BLOCK
,
7753 &objfile
->static_psymbols
,
7754 addr
, cu
->language
, objfile
);
7757 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
7758 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
7760 case DW_TAG_constant
:
7762 std::vector
<partial_symbol
*> *list
;
7764 if (pdi
->is_external
)
7765 list
= &objfile
->global_psymbols
;
7767 list
= &objfile
->static_psymbols
;
7768 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7769 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
7770 list
, 0, cu
->language
, objfile
);
7773 case DW_TAG_variable
:
7775 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
7779 && !dwarf2_per_objfile
->has_section_at_zero
)
7781 /* A global or static variable may also have been stripped
7782 out by the linker if unused, in which case its address
7783 will be nullified; do not add such variables into partial
7784 symbol table then. */
7786 else if (pdi
->is_external
)
7789 Don't enter into the minimal symbol tables as there is
7790 a minimal symbol table entry from the ELF symbols already.
7791 Enter into partial symbol table if it has a location
7792 descriptor or a type.
7793 If the location descriptor is missing, new_symbol will create
7794 a LOC_UNRESOLVED symbol, the address of the variable will then
7795 be determined from the minimal symbol table whenever the variable
7797 The address for the partial symbol table entry is not
7798 used by GDB, but it comes in handy for debugging partial symbol
7801 if (pdi
->d
.locdesc
|| pdi
->has_type
)
7802 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7803 built_actual_name
!= NULL
,
7804 VAR_DOMAIN
, LOC_STATIC
,
7805 &objfile
->global_psymbols
,
7807 cu
->language
, objfile
);
7811 int has_loc
= pdi
->d
.locdesc
!= NULL
;
7813 /* Static Variable. Skip symbols whose value we cannot know (those
7814 without location descriptors or constant values). */
7815 if (!has_loc
&& !pdi
->has_const_value
)
7817 xfree (built_actual_name
);
7821 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7822 built_actual_name
!= NULL
,
7823 VAR_DOMAIN
, LOC_STATIC
,
7824 &objfile
->static_psymbols
,
7825 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
7826 cu
->language
, objfile
);
7829 case DW_TAG_typedef
:
7830 case DW_TAG_base_type
:
7831 case DW_TAG_subrange_type
:
7832 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7833 built_actual_name
!= NULL
,
7834 VAR_DOMAIN
, LOC_TYPEDEF
,
7835 &objfile
->static_psymbols
,
7836 0, cu
->language
, objfile
);
7838 case DW_TAG_imported_declaration
:
7839 case DW_TAG_namespace
:
7840 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7841 built_actual_name
!= NULL
,
7842 VAR_DOMAIN
, LOC_TYPEDEF
,
7843 &objfile
->global_psymbols
,
7844 0, cu
->language
, objfile
);
7847 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7848 built_actual_name
!= NULL
,
7849 MODULE_DOMAIN
, LOC_TYPEDEF
,
7850 &objfile
->global_psymbols
,
7851 0, cu
->language
, objfile
);
7853 case DW_TAG_class_type
:
7854 case DW_TAG_interface_type
:
7855 case DW_TAG_structure_type
:
7856 case DW_TAG_union_type
:
7857 case DW_TAG_enumeration_type
:
7858 /* Skip external references. The DWARF standard says in the section
7859 about "Structure, Union, and Class Type Entries": "An incomplete
7860 structure, union or class type is represented by a structure,
7861 union or class entry that does not have a byte size attribute
7862 and that has a DW_AT_declaration attribute." */
7863 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7865 xfree (built_actual_name
);
7869 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7870 static vs. global. */
7871 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7872 built_actual_name
!= NULL
,
7873 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7874 cu
->language
== language_cplus
7875 ? &objfile
->global_psymbols
7876 : &objfile
->static_psymbols
,
7877 0, cu
->language
, objfile
);
7880 case DW_TAG_enumerator
:
7881 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7882 built_actual_name
!= NULL
,
7883 VAR_DOMAIN
, LOC_CONST
,
7884 cu
->language
== language_cplus
7885 ? &objfile
->global_psymbols
7886 : &objfile
->static_psymbols
,
7887 0, cu
->language
, objfile
);
7893 xfree (built_actual_name
);
7896 /* Read a partial die corresponding to a namespace; also, add a symbol
7897 corresponding to that namespace to the symbol table. NAMESPACE is
7898 the name of the enclosing namespace. */
7901 add_partial_namespace (struct partial_die_info
*pdi
,
7902 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7903 int set_addrmap
, struct dwarf2_cu
*cu
)
7905 /* Add a symbol for the namespace. */
7907 add_partial_symbol (pdi
, cu
);
7909 /* Now scan partial symbols in that namespace. */
7911 if (pdi
->has_children
)
7912 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7915 /* Read a partial die corresponding to a Fortran module. */
7918 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7919 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7921 /* Add a symbol for the namespace. */
7923 add_partial_symbol (pdi
, cu
);
7925 /* Now scan partial symbols in that module. */
7927 if (pdi
->has_children
)
7928 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7931 /* Read a partial die corresponding to a subprogram and create a partial
7932 symbol for that subprogram. When the CU language allows it, this
7933 routine also defines a partial symbol for each nested subprogram
7934 that this subprogram contains. If SET_ADDRMAP is true, record the
7935 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7936 and highest PC values found in PDI.
7938 PDI may also be a lexical block, in which case we simply search
7939 recursively for subprograms defined inside that lexical block.
7940 Again, this is only performed when the CU language allows this
7941 type of definitions. */
7944 add_partial_subprogram (struct partial_die_info
*pdi
,
7945 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7946 int set_addrmap
, struct dwarf2_cu
*cu
)
7948 if (pdi
->tag
== DW_TAG_subprogram
)
7950 if (pdi
->has_pc_info
)
7952 if (pdi
->lowpc
< *lowpc
)
7953 *lowpc
= pdi
->lowpc
;
7954 if (pdi
->highpc
> *highpc
)
7955 *highpc
= pdi
->highpc
;
7958 struct objfile
*objfile
= cu
->objfile
;
7959 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7964 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7965 SECT_OFF_TEXT (objfile
));
7966 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7967 pdi
->lowpc
+ baseaddr
);
7968 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7969 pdi
->highpc
+ baseaddr
);
7970 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7971 cu
->per_cu
->v
.psymtab
);
7975 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7977 if (!pdi
->is_declaration
)
7978 /* Ignore subprogram DIEs that do not have a name, they are
7979 illegal. Do not emit a complaint at this point, we will
7980 do so when we convert this psymtab into a symtab. */
7982 add_partial_symbol (pdi
, cu
);
7986 if (! pdi
->has_children
)
7989 if (cu
->language
== language_ada
)
7991 pdi
= pdi
->die_child
;
7994 fixup_partial_die (pdi
, cu
);
7995 if (pdi
->tag
== DW_TAG_subprogram
7996 || pdi
->tag
== DW_TAG_lexical_block
)
7997 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7998 pdi
= pdi
->die_sibling
;
8003 /* Read a partial die corresponding to an enumeration type. */
8006 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8007 struct dwarf2_cu
*cu
)
8009 struct partial_die_info
*pdi
;
8011 if (enum_pdi
->name
!= NULL
)
8012 add_partial_symbol (enum_pdi
, cu
);
8014 pdi
= enum_pdi
->die_child
;
8017 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8018 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8020 add_partial_symbol (pdi
, cu
);
8021 pdi
= pdi
->die_sibling
;
8025 /* Return the initial uleb128 in the die at INFO_PTR. */
8028 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8030 unsigned int bytes_read
;
8032 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8035 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
8036 Return the corresponding abbrev, or NULL if the number is zero (indicating
8037 an empty DIE). In either case *BYTES_READ will be set to the length of
8038 the initial number. */
8040 static struct abbrev_info
*
8041 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
8042 struct dwarf2_cu
*cu
)
8044 bfd
*abfd
= cu
->objfile
->obfd
;
8045 unsigned int abbrev_number
;
8046 struct abbrev_info
*abbrev
;
8048 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8050 if (abbrev_number
== 0)
8053 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
8056 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8057 " at offset 0x%x [in module %s]"),
8058 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8059 to_underlying (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8065 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8066 Returns a pointer to the end of a series of DIEs, terminated by an empty
8067 DIE. Any children of the skipped DIEs will also be skipped. */
8069 static const gdb_byte
*
8070 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8072 struct dwarf2_cu
*cu
= reader
->cu
;
8073 struct abbrev_info
*abbrev
;
8074 unsigned int bytes_read
;
8078 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8080 return info_ptr
+ bytes_read
;
8082 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8086 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8087 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8088 abbrev corresponding to that skipped uleb128 should be passed in
8089 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8092 static const gdb_byte
*
8093 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8094 struct abbrev_info
*abbrev
)
8096 unsigned int bytes_read
;
8097 struct attribute attr
;
8098 bfd
*abfd
= reader
->abfd
;
8099 struct dwarf2_cu
*cu
= reader
->cu
;
8100 const gdb_byte
*buffer
= reader
->buffer
;
8101 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8102 unsigned int form
, i
;
8104 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8106 /* The only abbrev we care about is DW_AT_sibling. */
8107 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8109 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
8110 if (attr
.form
== DW_FORM_ref_addr
)
8111 complaint (&symfile_complaints
,
8112 _("ignoring absolute DW_AT_sibling"));
8115 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
8116 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8118 if (sibling_ptr
< info_ptr
)
8119 complaint (&symfile_complaints
,
8120 _("DW_AT_sibling points backwards"));
8121 else if (sibling_ptr
> reader
->buffer_end
)
8122 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
8128 /* If it isn't DW_AT_sibling, skip this attribute. */
8129 form
= abbrev
->attrs
[i
].form
;
8133 case DW_FORM_ref_addr
:
8134 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8135 and later it is offset sized. */
8136 if (cu
->header
.version
== 2)
8137 info_ptr
+= cu
->header
.addr_size
;
8139 info_ptr
+= cu
->header
.offset_size
;
8141 case DW_FORM_GNU_ref_alt
:
8142 info_ptr
+= cu
->header
.offset_size
;
8145 info_ptr
+= cu
->header
.addr_size
;
8152 case DW_FORM_flag_present
:
8153 case DW_FORM_implicit_const
:
8165 case DW_FORM_ref_sig8
:
8168 case DW_FORM_data16
:
8171 case DW_FORM_string
:
8172 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8173 info_ptr
+= bytes_read
;
8175 case DW_FORM_sec_offset
:
8177 case DW_FORM_GNU_strp_alt
:
8178 info_ptr
+= cu
->header
.offset_size
;
8180 case DW_FORM_exprloc
:
8182 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8183 info_ptr
+= bytes_read
;
8185 case DW_FORM_block1
:
8186 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8188 case DW_FORM_block2
:
8189 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8191 case DW_FORM_block4
:
8192 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8196 case DW_FORM_ref_udata
:
8197 case DW_FORM_GNU_addr_index
:
8198 case DW_FORM_GNU_str_index
:
8199 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8201 case DW_FORM_indirect
:
8202 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8203 info_ptr
+= bytes_read
;
8204 /* We need to continue parsing from here, so just go back to
8206 goto skip_attribute
;
8209 error (_("Dwarf Error: Cannot handle %s "
8210 "in DWARF reader [in module %s]"),
8211 dwarf_form_name (form
),
8212 bfd_get_filename (abfd
));
8216 if (abbrev
->has_children
)
8217 return skip_children (reader
, info_ptr
);
8222 /* Locate ORIG_PDI's sibling.
8223 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8225 static const gdb_byte
*
8226 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8227 struct partial_die_info
*orig_pdi
,
8228 const gdb_byte
*info_ptr
)
8230 /* Do we know the sibling already? */
8232 if (orig_pdi
->sibling
)
8233 return orig_pdi
->sibling
;
8235 /* Are there any children to deal with? */
8237 if (!orig_pdi
->has_children
)
8240 /* Skip the children the long way. */
8242 return skip_children (reader
, info_ptr
);
8245 /* Expand this partial symbol table into a full symbol table. SELF is
8249 dwarf2_read_symtab (struct partial_symtab
*self
,
8250 struct objfile
*objfile
)
8254 warning (_("bug: psymtab for %s is already read in."),
8261 printf_filtered (_("Reading in symbols for %s..."),
8263 gdb_flush (gdb_stdout
);
8266 /* Restore our global data. */
8268 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
8269 dwarf2_objfile_data_key
);
8271 /* If this psymtab is constructed from a debug-only objfile, the
8272 has_section_at_zero flag will not necessarily be correct. We
8273 can get the correct value for this flag by looking at the data
8274 associated with the (presumably stripped) associated objfile. */
8275 if (objfile
->separate_debug_objfile_backlink
)
8277 struct dwarf2_per_objfile
*dpo_backlink
8278 = ((struct dwarf2_per_objfile
*)
8279 objfile_data (objfile
->separate_debug_objfile_backlink
,
8280 dwarf2_objfile_data_key
));
8282 dwarf2_per_objfile
->has_section_at_zero
8283 = dpo_backlink
->has_section_at_zero
;
8286 dwarf2_per_objfile
->reading_partial_symbols
= 0;
8288 psymtab_to_symtab_1 (self
);
8290 /* Finish up the debug error message. */
8292 printf_filtered (_("done.\n"));
8295 process_cu_includes ();
8298 /* Reading in full CUs. */
8300 /* Add PER_CU to the queue. */
8303 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8304 enum language pretend_language
)
8306 struct dwarf2_queue_item
*item
;
8309 item
= XNEW (struct dwarf2_queue_item
);
8310 item
->per_cu
= per_cu
;
8311 item
->pretend_language
= pretend_language
;
8314 if (dwarf2_queue
== NULL
)
8315 dwarf2_queue
= item
;
8317 dwarf2_queue_tail
->next
= item
;
8319 dwarf2_queue_tail
= item
;
8322 /* If PER_CU is not yet queued, add it to the queue.
8323 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8325 The result is non-zero if PER_CU was queued, otherwise the result is zero
8326 meaning either PER_CU is already queued or it is already loaded.
8328 N.B. There is an invariant here that if a CU is queued then it is loaded.
8329 The caller is required to load PER_CU if we return non-zero. */
8332 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8333 struct dwarf2_per_cu_data
*per_cu
,
8334 enum language pretend_language
)
8336 /* We may arrive here during partial symbol reading, if we need full
8337 DIEs to process an unusual case (e.g. template arguments). Do
8338 not queue PER_CU, just tell our caller to load its DIEs. */
8339 if (dwarf2_per_objfile
->reading_partial_symbols
)
8341 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8346 /* Mark the dependence relation so that we don't flush PER_CU
8348 if (dependent_cu
!= NULL
)
8349 dwarf2_add_dependence (dependent_cu
, per_cu
);
8351 /* If it's already on the queue, we have nothing to do. */
8355 /* If the compilation unit is already loaded, just mark it as
8357 if (per_cu
->cu
!= NULL
)
8359 per_cu
->cu
->last_used
= 0;
8363 /* Add it to the queue. */
8364 queue_comp_unit (per_cu
, pretend_language
);
8369 /* Process the queue. */
8372 process_queue (void)
8374 struct dwarf2_queue_item
*item
, *next_item
;
8376 if (dwarf_read_debug
)
8378 fprintf_unfiltered (gdb_stdlog
,
8379 "Expanding one or more symtabs of objfile %s ...\n",
8380 objfile_name (dwarf2_per_objfile
->objfile
));
8383 /* The queue starts out with one item, but following a DIE reference
8384 may load a new CU, adding it to the end of the queue. */
8385 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
8387 if ((dwarf2_per_objfile
->using_index
8388 ? !item
->per_cu
->v
.quick
->compunit_symtab
8389 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
8390 /* Skip dummy CUs. */
8391 && item
->per_cu
->cu
!= NULL
)
8393 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
8394 unsigned int debug_print_threshold
;
8397 if (per_cu
->is_debug_types
)
8399 struct signatured_type
*sig_type
=
8400 (struct signatured_type
*) per_cu
;
8402 sprintf (buf
, "TU %s at offset 0x%x",
8403 hex_string (sig_type
->signature
),
8404 to_underlying (per_cu
->sect_off
));
8405 /* There can be 100s of TUs.
8406 Only print them in verbose mode. */
8407 debug_print_threshold
= 2;
8411 sprintf (buf
, "CU at offset 0x%x",
8412 to_underlying (per_cu
->sect_off
));
8413 debug_print_threshold
= 1;
8416 if (dwarf_read_debug
>= debug_print_threshold
)
8417 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
8419 if (per_cu
->is_debug_types
)
8420 process_full_type_unit (per_cu
, item
->pretend_language
);
8422 process_full_comp_unit (per_cu
, item
->pretend_language
);
8424 if (dwarf_read_debug
>= debug_print_threshold
)
8425 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
8428 item
->per_cu
->queued
= 0;
8429 next_item
= item
->next
;
8433 dwarf2_queue_tail
= NULL
;
8435 if (dwarf_read_debug
)
8437 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
8438 objfile_name (dwarf2_per_objfile
->objfile
));
8442 /* Free all allocated queue entries. This function only releases anything if
8443 an error was thrown; if the queue was processed then it would have been
8444 freed as we went along. */
8447 dwarf2_release_queue (void *dummy
)
8449 struct dwarf2_queue_item
*item
, *last
;
8451 item
= dwarf2_queue
;
8454 /* Anything still marked queued is likely to be in an
8455 inconsistent state, so discard it. */
8456 if (item
->per_cu
->queued
)
8458 if (item
->per_cu
->cu
!= NULL
)
8459 free_one_cached_comp_unit (item
->per_cu
);
8460 item
->per_cu
->queued
= 0;
8468 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
8471 /* Read in full symbols for PST, and anything it depends on. */
8474 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
8476 struct dwarf2_per_cu_data
*per_cu
;
8482 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
8483 if (!pst
->dependencies
[i
]->readin
8484 && pst
->dependencies
[i
]->user
== NULL
)
8486 /* Inform about additional files that need to be read in. */
8489 /* FIXME: i18n: Need to make this a single string. */
8490 fputs_filtered (" ", gdb_stdout
);
8492 fputs_filtered ("and ", gdb_stdout
);
8494 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
8495 wrap_here (""); /* Flush output. */
8496 gdb_flush (gdb_stdout
);
8498 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
8501 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
8505 /* It's an include file, no symbols to read for it.
8506 Everything is in the parent symtab. */
8511 dw2_do_instantiate_symtab (per_cu
);
8514 /* Trivial hash function for die_info: the hash value of a DIE
8515 is its offset in .debug_info for this objfile. */
8518 die_hash (const void *item
)
8520 const struct die_info
*die
= (const struct die_info
*) item
;
8522 return to_underlying (die
->sect_off
);
8525 /* Trivial comparison function for die_info structures: two DIEs
8526 are equal if they have the same offset. */
8529 die_eq (const void *item_lhs
, const void *item_rhs
)
8531 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
8532 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
8534 return die_lhs
->sect_off
== die_rhs
->sect_off
;
8537 /* die_reader_func for load_full_comp_unit.
8538 This is identical to read_signatured_type_reader,
8539 but is kept separate for now. */
8542 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
8543 const gdb_byte
*info_ptr
,
8544 struct die_info
*comp_unit_die
,
8548 struct dwarf2_cu
*cu
= reader
->cu
;
8549 enum language
*language_ptr
= (enum language
*) data
;
8551 gdb_assert (cu
->die_hash
== NULL
);
8553 htab_create_alloc_ex (cu
->header
.length
/ 12,
8557 &cu
->comp_unit_obstack
,
8558 hashtab_obstack_allocate
,
8559 dummy_obstack_deallocate
);
8562 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
8563 &info_ptr
, comp_unit_die
);
8564 cu
->dies
= comp_unit_die
;
8565 /* comp_unit_die is not stored in die_hash, no need. */
8567 /* We try not to read any attributes in this function, because not
8568 all CUs needed for references have been loaded yet, and symbol
8569 table processing isn't initialized. But we have to set the CU language,
8570 or we won't be able to build types correctly.
8571 Similarly, if we do not read the producer, we can not apply
8572 producer-specific interpretation. */
8573 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
8576 /* Load the DIEs associated with PER_CU into memory. */
8579 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8580 enum language pretend_language
)
8582 gdb_assert (! this_cu
->is_debug_types
);
8584 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8585 load_full_comp_unit_reader
, &pretend_language
);
8588 /* Add a DIE to the delayed physname list. */
8591 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8592 const char *name
, struct die_info
*die
,
8593 struct dwarf2_cu
*cu
)
8595 struct delayed_method_info mi
;
8597 mi
.fnfield_index
= fnfield_index
;
8601 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
8604 /* A cleanup for freeing the delayed method list. */
8607 free_delayed_list (void *ptr
)
8609 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
8610 if (cu
->method_list
!= NULL
)
8612 VEC_free (delayed_method_info
, cu
->method_list
);
8613 cu
->method_list
= NULL
;
8617 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
8618 "const" / "volatile". If so, decrements LEN by the length of the
8619 modifier and return true. Otherwise return false. */
8623 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
8625 size_t mod_len
= sizeof (mod
) - 1;
8626 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
8634 /* Compute the physnames of any methods on the CU's method list.
8636 The computation of method physnames is delayed in order to avoid the
8637 (bad) condition that one of the method's formal parameters is of an as yet
8641 compute_delayed_physnames (struct dwarf2_cu
*cu
)
8644 struct delayed_method_info
*mi
;
8646 /* Only C++ delays computing physnames. */
8647 if (VEC_empty (delayed_method_info
, cu
->method_list
))
8649 gdb_assert (cu
->language
== language_cplus
);
8651 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
8653 const char *physname
;
8654 struct fn_fieldlist
*fn_flp
8655 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
8656 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
8657 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
8658 = physname
? physname
: "";
8660 /* Since there's no tag to indicate whether a method is a
8661 const/volatile overload, extract that information out of the
8663 if (physname
!= NULL
)
8665 size_t len
= strlen (physname
);
8669 if (physname
[len
] == ')') /* shortcut */
8671 else if (check_modifier (physname
, len
, " const"))
8672 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
->index
) = 1;
8673 else if (check_modifier (physname
, len
, " volatile"))
8674 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
->index
) = 1;
8682 /* Go objects should be embedded in a DW_TAG_module DIE,
8683 and it's not clear if/how imported objects will appear.
8684 To keep Go support simple until that's worked out,
8685 go back through what we've read and create something usable.
8686 We could do this while processing each DIE, and feels kinda cleaner,
8687 but that way is more invasive.
8688 This is to, for example, allow the user to type "p var" or "b main"
8689 without having to specify the package name, and allow lookups
8690 of module.object to work in contexts that use the expression
8694 fixup_go_packaging (struct dwarf2_cu
*cu
)
8696 char *package_name
= NULL
;
8697 struct pending
*list
;
8700 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
8702 for (i
= 0; i
< list
->nsyms
; ++i
)
8704 struct symbol
*sym
= list
->symbol
[i
];
8706 if (SYMBOL_LANGUAGE (sym
) == language_go
8707 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
8709 char *this_package_name
= go_symbol_package_name (sym
);
8711 if (this_package_name
== NULL
)
8713 if (package_name
== NULL
)
8714 package_name
= this_package_name
;
8717 if (strcmp (package_name
, this_package_name
) != 0)
8718 complaint (&symfile_complaints
,
8719 _("Symtab %s has objects from two different Go packages: %s and %s"),
8720 (symbol_symtab (sym
) != NULL
8721 ? symtab_to_filename_for_display
8722 (symbol_symtab (sym
))
8723 : objfile_name (cu
->objfile
)),
8724 this_package_name
, package_name
);
8725 xfree (this_package_name
);
8731 if (package_name
!= NULL
)
8733 struct objfile
*objfile
= cu
->objfile
;
8734 const char *saved_package_name
8735 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8737 strlen (package_name
));
8738 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
8739 saved_package_name
);
8742 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8744 sym
= allocate_symbol (objfile
);
8745 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
8746 SYMBOL_SET_NAMES (sym
, saved_package_name
,
8747 strlen (saved_package_name
), 0, objfile
);
8748 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
8749 e.g., "main" finds the "main" module and not C's main(). */
8750 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8751 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
8752 SYMBOL_TYPE (sym
) = type
;
8754 add_symbol_to_list (sym
, &global_symbols
);
8756 xfree (package_name
);
8760 /* Return the symtab for PER_CU. This works properly regardless of
8761 whether we're using the index or psymtabs. */
8763 static struct compunit_symtab
*
8764 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
8766 return (dwarf2_per_objfile
->using_index
8767 ? per_cu
->v
.quick
->compunit_symtab
8768 : per_cu
->v
.psymtab
->compunit_symtab
);
8771 /* A helper function for computing the list of all symbol tables
8772 included by PER_CU. */
8775 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
8776 htab_t all_children
, htab_t all_type_symtabs
,
8777 struct dwarf2_per_cu_data
*per_cu
,
8778 struct compunit_symtab
*immediate_parent
)
8782 struct compunit_symtab
*cust
;
8783 struct dwarf2_per_cu_data
*iter
;
8785 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
8788 /* This inclusion and its children have been processed. */
8793 /* Only add a CU if it has a symbol table. */
8794 cust
= get_compunit_symtab (per_cu
);
8797 /* If this is a type unit only add its symbol table if we haven't
8798 seen it yet (type unit per_cu's can share symtabs). */
8799 if (per_cu
->is_debug_types
)
8801 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
8805 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8806 if (cust
->user
== NULL
)
8807 cust
->user
= immediate_parent
;
8812 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8813 if (cust
->user
== NULL
)
8814 cust
->user
= immediate_parent
;
8819 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
8822 recursively_compute_inclusions (result
, all_children
,
8823 all_type_symtabs
, iter
, cust
);
8827 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
8831 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
8833 gdb_assert (! per_cu
->is_debug_types
);
8835 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
8838 struct dwarf2_per_cu_data
*per_cu_iter
;
8839 struct compunit_symtab
*compunit_symtab_iter
;
8840 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
8841 htab_t all_children
, all_type_symtabs
;
8842 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
8844 /* If we don't have a symtab, we can just skip this case. */
8848 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8849 NULL
, xcalloc
, xfree
);
8850 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8851 NULL
, xcalloc
, xfree
);
8854 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
8858 recursively_compute_inclusions (&result_symtabs
, all_children
,
8859 all_type_symtabs
, per_cu_iter
,
8863 /* Now we have a transitive closure of all the included symtabs. */
8864 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
8866 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
8867 struct compunit_symtab
*, len
+ 1);
8869 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
8870 compunit_symtab_iter
);
8872 cust
->includes
[ix
] = compunit_symtab_iter
;
8873 cust
->includes
[len
] = NULL
;
8875 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8876 htab_delete (all_children
);
8877 htab_delete (all_type_symtabs
);
8881 /* Compute the 'includes' field for the symtabs of all the CUs we just
8885 process_cu_includes (void)
8888 struct dwarf2_per_cu_data
*iter
;
8891 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8895 if (! iter
->is_debug_types
)
8896 compute_compunit_symtab_includes (iter
);
8899 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8902 /* Generate full symbol information for PER_CU, whose DIEs have
8903 already been loaded into memory. */
8906 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8907 enum language pretend_language
)
8909 struct dwarf2_cu
*cu
= per_cu
->cu
;
8910 struct objfile
*objfile
= per_cu
->objfile
;
8911 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8912 CORE_ADDR lowpc
, highpc
;
8913 struct compunit_symtab
*cust
;
8914 struct cleanup
*delayed_list_cleanup
;
8916 struct block
*static_block
;
8919 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8922 scoped_free_pendings free_pending
;
8923 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8925 cu
->list_in_scope
= &file_symbols
;
8927 cu
->language
= pretend_language
;
8928 cu
->language_defn
= language_def (cu
->language
);
8930 /* Do line number decoding in read_file_scope () */
8931 process_die (cu
->dies
, cu
);
8933 /* For now fudge the Go package. */
8934 if (cu
->language
== language_go
)
8935 fixup_go_packaging (cu
);
8937 /* Now that we have processed all the DIEs in the CU, all the types
8938 should be complete, and it should now be safe to compute all of the
8940 compute_delayed_physnames (cu
);
8941 do_cleanups (delayed_list_cleanup
);
8943 /* Some compilers don't define a DW_AT_high_pc attribute for the
8944 compilation unit. If the DW_AT_high_pc is missing, synthesize
8945 it, by scanning the DIE's below the compilation unit. */
8946 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8948 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8949 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8951 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8952 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8953 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8954 addrmap to help ensure it has an accurate map of pc values belonging to
8956 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8958 cust
= end_symtab_from_static_block (static_block
,
8959 SECT_OFF_TEXT (objfile
), 0);
8963 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8965 /* Set symtab language to language from DW_AT_language. If the
8966 compilation is from a C file generated by language preprocessors, do
8967 not set the language if it was already deduced by start_subfile. */
8968 if (!(cu
->language
== language_c
8969 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8970 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8972 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8973 produce DW_AT_location with location lists but it can be possibly
8974 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8975 there were bugs in prologue debug info, fixed later in GCC-4.5
8976 by "unwind info for epilogues" patch (which is not directly related).
8978 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8979 needed, it would be wrong due to missing DW_AT_producer there.
8981 Still one can confuse GDB by using non-standard GCC compilation
8982 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8984 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8985 cust
->locations_valid
= 1;
8987 if (gcc_4_minor
>= 5)
8988 cust
->epilogue_unwind_valid
= 1;
8990 cust
->call_site_htab
= cu
->call_site_htab
;
8993 if (dwarf2_per_objfile
->using_index
)
8994 per_cu
->v
.quick
->compunit_symtab
= cust
;
8997 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8998 pst
->compunit_symtab
= cust
;
9002 /* Push it for inclusion processing later. */
9003 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
9006 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9007 already been loaded into memory. */
9010 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9011 enum language pretend_language
)
9013 struct dwarf2_cu
*cu
= per_cu
->cu
;
9014 struct objfile
*objfile
= per_cu
->objfile
;
9015 struct compunit_symtab
*cust
;
9016 struct cleanup
*delayed_list_cleanup
;
9017 struct signatured_type
*sig_type
;
9019 gdb_assert (per_cu
->is_debug_types
);
9020 sig_type
= (struct signatured_type
*) per_cu
;
9023 scoped_free_pendings free_pending
;
9024 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
9026 cu
->list_in_scope
= &file_symbols
;
9028 cu
->language
= pretend_language
;
9029 cu
->language_defn
= language_def (cu
->language
);
9031 /* The symbol tables are set up in read_type_unit_scope. */
9032 process_die (cu
->dies
, cu
);
9034 /* For now fudge the Go package. */
9035 if (cu
->language
== language_go
)
9036 fixup_go_packaging (cu
);
9038 /* Now that we have processed all the DIEs in the CU, all the types
9039 should be complete, and it should now be safe to compute all of the
9041 compute_delayed_physnames (cu
);
9042 do_cleanups (delayed_list_cleanup
);
9044 /* TUs share symbol tables.
9045 If this is the first TU to use this symtab, complete the construction
9046 of it with end_expandable_symtab. Otherwise, complete the addition of
9047 this TU's symbols to the existing symtab. */
9048 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9050 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9051 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9055 /* Set symtab language to language from DW_AT_language. If the
9056 compilation is from a C file generated by language preprocessors,
9057 do not set the language if it was already deduced by
9059 if (!(cu
->language
== language_c
9060 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9061 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9066 augment_type_symtab ();
9067 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9070 if (dwarf2_per_objfile
->using_index
)
9071 per_cu
->v
.quick
->compunit_symtab
= cust
;
9074 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
9075 pst
->compunit_symtab
= cust
;
9080 /* Process an imported unit DIE. */
9083 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9085 struct attribute
*attr
;
9087 /* For now we don't handle imported units in type units. */
9088 if (cu
->per_cu
->is_debug_types
)
9090 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9091 " supported in type units [in module %s]"),
9092 objfile_name (cu
->objfile
));
9095 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9098 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9099 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9100 dwarf2_per_cu_data
*per_cu
9101 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, cu
->objfile
);
9103 /* If necessary, add it to the queue and load its DIEs. */
9104 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9105 load_full_comp_unit (per_cu
, cu
->language
);
9107 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
9112 /* RAII object that represents a process_die scope: i.e.,
9113 starts/finishes processing a DIE. */
9114 class process_die_scope
9117 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9118 : m_die (die
), m_cu (cu
)
9120 /* We should only be processing DIEs not already in process. */
9121 gdb_assert (!m_die
->in_process
);
9122 m_die
->in_process
= true;
9125 ~process_die_scope ()
9127 m_die
->in_process
= false;
9129 /* If we're done processing the DIE for the CU that owns the line
9130 header, we don't need the line header anymore. */
9131 if (m_cu
->line_header_die_owner
== m_die
)
9133 delete m_cu
->line_header
;
9134 m_cu
->line_header
= NULL
;
9135 m_cu
->line_header_die_owner
= NULL
;
9144 /* Process a die and its children. */
9147 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9149 process_die_scope
scope (die
, cu
);
9153 case DW_TAG_padding
:
9155 case DW_TAG_compile_unit
:
9156 case DW_TAG_partial_unit
:
9157 read_file_scope (die
, cu
);
9159 case DW_TAG_type_unit
:
9160 read_type_unit_scope (die
, cu
);
9162 case DW_TAG_subprogram
:
9163 case DW_TAG_inlined_subroutine
:
9164 read_func_scope (die
, cu
);
9166 case DW_TAG_lexical_block
:
9167 case DW_TAG_try_block
:
9168 case DW_TAG_catch_block
:
9169 read_lexical_block_scope (die
, cu
);
9171 case DW_TAG_call_site
:
9172 case DW_TAG_GNU_call_site
:
9173 read_call_site_scope (die
, cu
);
9175 case DW_TAG_class_type
:
9176 case DW_TAG_interface_type
:
9177 case DW_TAG_structure_type
:
9178 case DW_TAG_union_type
:
9179 process_structure_scope (die
, cu
);
9181 case DW_TAG_enumeration_type
:
9182 process_enumeration_scope (die
, cu
);
9185 /* These dies have a type, but processing them does not create
9186 a symbol or recurse to process the children. Therefore we can
9187 read them on-demand through read_type_die. */
9188 case DW_TAG_subroutine_type
:
9189 case DW_TAG_set_type
:
9190 case DW_TAG_array_type
:
9191 case DW_TAG_pointer_type
:
9192 case DW_TAG_ptr_to_member_type
:
9193 case DW_TAG_reference_type
:
9194 case DW_TAG_rvalue_reference_type
:
9195 case DW_TAG_string_type
:
9198 case DW_TAG_base_type
:
9199 case DW_TAG_subrange_type
:
9200 case DW_TAG_typedef
:
9201 /* Add a typedef symbol for the type definition, if it has a
9203 new_symbol (die
, read_type_die (die
, cu
), cu
);
9205 case DW_TAG_common_block
:
9206 read_common_block (die
, cu
);
9208 case DW_TAG_common_inclusion
:
9210 case DW_TAG_namespace
:
9211 cu
->processing_has_namespace_info
= 1;
9212 read_namespace (die
, cu
);
9215 cu
->processing_has_namespace_info
= 1;
9216 read_module (die
, cu
);
9218 case DW_TAG_imported_declaration
:
9219 cu
->processing_has_namespace_info
= 1;
9220 if (read_namespace_alias (die
, cu
))
9222 /* The declaration is not a global namespace alias: fall through. */
9223 case DW_TAG_imported_module
:
9224 cu
->processing_has_namespace_info
= 1;
9225 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
9226 || cu
->language
!= language_fortran
))
9227 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
9228 dwarf_tag_name (die
->tag
));
9229 read_import_statement (die
, cu
);
9232 case DW_TAG_imported_unit
:
9233 process_imported_unit_die (die
, cu
);
9237 new_symbol (die
, NULL
, cu
);
9242 /* DWARF name computation. */
9244 /* A helper function for dwarf2_compute_name which determines whether DIE
9245 needs to have the name of the scope prepended to the name listed in the
9249 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9251 struct attribute
*attr
;
9255 case DW_TAG_namespace
:
9256 case DW_TAG_typedef
:
9257 case DW_TAG_class_type
:
9258 case DW_TAG_interface_type
:
9259 case DW_TAG_structure_type
:
9260 case DW_TAG_union_type
:
9261 case DW_TAG_enumeration_type
:
9262 case DW_TAG_enumerator
:
9263 case DW_TAG_subprogram
:
9264 case DW_TAG_inlined_subroutine
:
9266 case DW_TAG_imported_declaration
:
9269 case DW_TAG_variable
:
9270 case DW_TAG_constant
:
9271 /* We only need to prefix "globally" visible variables. These include
9272 any variable marked with DW_AT_external or any variable that
9273 lives in a namespace. [Variables in anonymous namespaces
9274 require prefixing, but they are not DW_AT_external.] */
9276 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
9278 struct dwarf2_cu
*spec_cu
= cu
;
9280 return die_needs_namespace (die_specification (die
, &spec_cu
),
9284 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
9285 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
9286 && die
->parent
->tag
!= DW_TAG_module
)
9288 /* A variable in a lexical block of some kind does not need a
9289 namespace, even though in C++ such variables may be external
9290 and have a mangled name. */
9291 if (die
->parent
->tag
== DW_TAG_lexical_block
9292 || die
->parent
->tag
== DW_TAG_try_block
9293 || die
->parent
->tag
== DW_TAG_catch_block
9294 || die
->parent
->tag
== DW_TAG_subprogram
)
9303 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
9304 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9305 defined for the given DIE. */
9307 static struct attribute
*
9308 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
9310 struct attribute
*attr
;
9312 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
9314 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9319 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
9320 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
9321 defined for the given DIE. */
9324 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9326 const char *linkage_name
;
9328 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
9329 if (linkage_name
== NULL
)
9330 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9332 return linkage_name
;
9335 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
9336 compute the physname for the object, which include a method's:
9337 - formal parameters (C++),
9338 - receiver type (Go),
9340 The term "physname" is a bit confusing.
9341 For C++, for example, it is the demangled name.
9342 For Go, for example, it's the mangled name.
9344 For Ada, return the DIE's linkage name rather than the fully qualified
9345 name. PHYSNAME is ignored..
9347 The result is allocated on the objfile_obstack and canonicalized. */
9350 dwarf2_compute_name (const char *name
,
9351 struct die_info
*die
, struct dwarf2_cu
*cu
,
9354 struct objfile
*objfile
= cu
->objfile
;
9357 name
= dwarf2_name (die
, cu
);
9359 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
9360 but otherwise compute it by typename_concat inside GDB.
9361 FIXME: Actually this is not really true, or at least not always true.
9362 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
9363 Fortran names because there is no mangling standard. So new_symbol_full
9364 will set the demangled name to the result of dwarf2_full_name, and it is
9365 the demangled name that GDB uses if it exists. */
9366 if (cu
->language
== language_ada
9367 || (cu
->language
== language_fortran
&& physname
))
9369 /* For Ada unit, we prefer the linkage name over the name, as
9370 the former contains the exported name, which the user expects
9371 to be able to reference. Ideally, we want the user to be able
9372 to reference this entity using either natural or linkage name,
9373 but we haven't started looking at this enhancement yet. */
9374 const char *linkage_name
= dw2_linkage_name (die
, cu
);
9376 if (linkage_name
!= NULL
)
9377 return linkage_name
;
9380 /* These are the only languages we know how to qualify names in. */
9382 && (cu
->language
== language_cplus
9383 || cu
->language
== language_fortran
|| cu
->language
== language_d
9384 || cu
->language
== language_rust
))
9386 if (die_needs_namespace (die
, cu
))
9390 const char *canonical_name
= NULL
;
9394 prefix
= determine_prefix (die
, cu
);
9395 if (*prefix
!= '\0')
9397 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
9400 buf
.puts (prefixed_name
);
9401 xfree (prefixed_name
);
9406 /* Template parameters may be specified in the DIE's DW_AT_name, or
9407 as children with DW_TAG_template_type_param or
9408 DW_TAG_value_type_param. If the latter, add them to the name
9409 here. If the name already has template parameters, then
9410 skip this step; some versions of GCC emit both, and
9411 it is more efficient to use the pre-computed name.
9413 Something to keep in mind about this process: it is very
9414 unlikely, or in some cases downright impossible, to produce
9415 something that will match the mangled name of a function.
9416 If the definition of the function has the same debug info,
9417 we should be able to match up with it anyway. But fallbacks
9418 using the minimal symbol, for instance to find a method
9419 implemented in a stripped copy of libstdc++, will not work.
9420 If we do not have debug info for the definition, we will have to
9421 match them up some other way.
9423 When we do name matching there is a related problem with function
9424 templates; two instantiated function templates are allowed to
9425 differ only by their return types, which we do not add here. */
9427 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
9429 struct attribute
*attr
;
9430 struct die_info
*child
;
9433 die
->building_fullname
= 1;
9435 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
9439 const gdb_byte
*bytes
;
9440 struct dwarf2_locexpr_baton
*baton
;
9443 if (child
->tag
!= DW_TAG_template_type_param
9444 && child
->tag
!= DW_TAG_template_value_param
)
9455 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
9458 complaint (&symfile_complaints
,
9459 _("template parameter missing DW_AT_type"));
9460 buf
.puts ("UNKNOWN_TYPE");
9463 type
= die_type (child
, cu
);
9465 if (child
->tag
== DW_TAG_template_type_param
)
9467 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
9471 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
9474 complaint (&symfile_complaints
,
9475 _("template parameter missing "
9476 "DW_AT_const_value"));
9477 buf
.puts ("UNKNOWN_VALUE");
9481 dwarf2_const_value_attr (attr
, type
, name
,
9482 &cu
->comp_unit_obstack
, cu
,
9483 &value
, &bytes
, &baton
);
9485 if (TYPE_NOSIGN (type
))
9486 /* GDB prints characters as NUMBER 'CHAR'. If that's
9487 changed, this can use value_print instead. */
9488 c_printchar (value
, type
, &buf
);
9491 struct value_print_options opts
;
9494 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
9498 else if (bytes
!= NULL
)
9500 v
= allocate_value (type
);
9501 memcpy (value_contents_writeable (v
), bytes
,
9502 TYPE_LENGTH (type
));
9505 v
= value_from_longest (type
, value
);
9507 /* Specify decimal so that we do not depend on
9509 get_formatted_print_options (&opts
, 'd');
9511 value_print (v
, &buf
, &opts
);
9517 die
->building_fullname
= 0;
9521 /* Close the argument list, with a space if necessary
9522 (nested templates). */
9523 if (!buf
.empty () && buf
.string ().back () == '>')
9530 /* For C++ methods, append formal parameter type
9531 information, if PHYSNAME. */
9533 if (physname
&& die
->tag
== DW_TAG_subprogram
9534 && cu
->language
== language_cplus
)
9536 struct type
*type
= read_type_die (die
, cu
);
9538 c_type_print_args (type
, &buf
, 1, cu
->language
,
9539 &type_print_raw_options
);
9541 if (cu
->language
== language_cplus
)
9543 /* Assume that an artificial first parameter is
9544 "this", but do not crash if it is not. RealView
9545 marks unnamed (and thus unused) parameters as
9546 artificial; there is no way to differentiate
9548 if (TYPE_NFIELDS (type
) > 0
9549 && TYPE_FIELD_ARTIFICIAL (type
, 0)
9550 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
9551 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
9553 buf
.puts (" const");
9557 const std::string
&intermediate_name
= buf
.string ();
9559 if (cu
->language
== language_cplus
)
9561 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
9562 &objfile
->per_bfd
->storage_obstack
);
9564 /* If we only computed INTERMEDIATE_NAME, or if
9565 INTERMEDIATE_NAME is already canonical, then we need to
9566 copy it to the appropriate obstack. */
9567 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
9568 name
= ((const char *)
9569 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9570 intermediate_name
.c_str (),
9571 intermediate_name
.length ()));
9573 name
= canonical_name
;
9580 /* Return the fully qualified name of DIE, based on its DW_AT_name.
9581 If scope qualifiers are appropriate they will be added. The result
9582 will be allocated on the storage_obstack, or NULL if the DIE does
9583 not have a name. NAME may either be from a previous call to
9584 dwarf2_name or NULL.
9586 The output string will be canonicalized (if C++). */
9589 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9591 return dwarf2_compute_name (name
, die
, cu
, 0);
9594 /* Construct a physname for the given DIE in CU. NAME may either be
9595 from a previous call to dwarf2_name or NULL. The result will be
9596 allocated on the objfile_objstack or NULL if the DIE does not have a
9599 The output string will be canonicalized (if C++). */
9602 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9604 struct objfile
*objfile
= cu
->objfile
;
9605 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
9608 /* In this case dwarf2_compute_name is just a shortcut not building anything
9610 if (!die_needs_namespace (die
, cu
))
9611 return dwarf2_compute_name (name
, die
, cu
, 1);
9613 mangled
= dw2_linkage_name (die
, cu
);
9615 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
9616 See https://github.com/rust-lang/rust/issues/32925. */
9617 if (cu
->language
== language_rust
&& mangled
!= NULL
9618 && strchr (mangled
, '{') != NULL
)
9621 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
9623 gdb::unique_xmalloc_ptr
<char> demangled
;
9624 if (mangled
!= NULL
)
9626 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
9627 type. It is easier for GDB users to search for such functions as
9628 `name(params)' than `long name(params)'. In such case the minimal
9629 symbol names do not match the full symbol names but for template
9630 functions there is never a need to look up their definition from their
9631 declaration so the only disadvantage remains the minimal symbol
9632 variant `long name(params)' does not have the proper inferior type.
9635 if (cu
->language
== language_go
)
9637 /* This is a lie, but we already lie to the caller new_symbol_full.
9638 new_symbol_full assumes we return the mangled name.
9639 This just undoes that lie until things are cleaned up. */
9643 demangled
.reset (gdb_demangle (mangled
,
9644 (DMGL_PARAMS
| DMGL_ANSI
9648 canon
= demangled
.get ();
9656 if (canon
== NULL
|| check_physname
)
9658 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
9660 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
9662 /* It may not mean a bug in GDB. The compiler could also
9663 compute DW_AT_linkage_name incorrectly. But in such case
9664 GDB would need to be bug-to-bug compatible. */
9666 complaint (&symfile_complaints
,
9667 _("Computed physname <%s> does not match demangled <%s> "
9668 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
9669 physname
, canon
, mangled
, to_underlying (die
->sect_off
),
9670 objfile_name (objfile
));
9672 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
9673 is available here - over computed PHYSNAME. It is safer
9674 against both buggy GDB and buggy compilers. */
9688 retval
= ((const char *)
9689 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9690 retval
, strlen (retval
)));
9695 /* Inspect DIE in CU for a namespace alias. If one exists, record
9696 a new symbol for it.
9698 Returns 1 if a namespace alias was recorded, 0 otherwise. */
9701 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
9703 struct attribute
*attr
;
9705 /* If the die does not have a name, this is not a namespace
9707 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9711 struct die_info
*d
= die
;
9712 struct dwarf2_cu
*imported_cu
= cu
;
9714 /* If the compiler has nested DW_AT_imported_declaration DIEs,
9715 keep inspecting DIEs until we hit the underlying import. */
9716 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
9717 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
9719 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
9723 d
= follow_die_ref (d
, attr
, &imported_cu
);
9724 if (d
->tag
!= DW_TAG_imported_declaration
)
9728 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
9730 complaint (&symfile_complaints
,
9731 _("DIE at 0x%x has too many recursively imported "
9732 "declarations"), to_underlying (d
->sect_off
));
9739 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9741 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
9742 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
9744 /* This declaration is a global namespace alias. Add
9745 a symbol for it whose type is the aliased namespace. */
9746 new_symbol (die
, type
, cu
);
9755 /* Return the using directives repository (global or local?) to use in the
9756 current context for LANGUAGE.
9758 For Ada, imported declarations can materialize renamings, which *may* be
9759 global. However it is impossible (for now?) in DWARF to distinguish
9760 "external" imported declarations and "static" ones. As all imported
9761 declarations seem to be static in all other languages, make them all CU-wide
9762 global only in Ada. */
9764 static struct using_direct
**
9765 using_directives (enum language language
)
9767 if (language
== language_ada
&& context_stack_depth
== 0)
9768 return &global_using_directives
;
9770 return &local_using_directives
;
9773 /* Read the import statement specified by the given die and record it. */
9776 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
9778 struct objfile
*objfile
= cu
->objfile
;
9779 struct attribute
*import_attr
;
9780 struct die_info
*imported_die
, *child_die
;
9781 struct dwarf2_cu
*imported_cu
;
9782 const char *imported_name
;
9783 const char *imported_name_prefix
;
9784 const char *canonical_name
;
9785 const char *import_alias
;
9786 const char *imported_declaration
= NULL
;
9787 const char *import_prefix
;
9788 std::vector
<const char *> excludes
;
9790 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9791 if (import_attr
== NULL
)
9793 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9794 dwarf_tag_name (die
->tag
));
9799 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
9800 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9801 if (imported_name
== NULL
)
9803 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
9805 The import in the following code:
9819 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
9820 <52> DW_AT_decl_file : 1
9821 <53> DW_AT_decl_line : 6
9822 <54> DW_AT_import : <0x75>
9823 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
9825 <5b> DW_AT_decl_file : 1
9826 <5c> DW_AT_decl_line : 2
9827 <5d> DW_AT_type : <0x6e>
9829 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
9830 <76> DW_AT_byte_size : 4
9831 <77> DW_AT_encoding : 5 (signed)
9833 imports the wrong die ( 0x75 instead of 0x58 ).
9834 This case will be ignored until the gcc bug is fixed. */
9838 /* Figure out the local name after import. */
9839 import_alias
= dwarf2_name (die
, cu
);
9841 /* Figure out where the statement is being imported to. */
9842 import_prefix
= determine_prefix (die
, cu
);
9844 /* Figure out what the scope of the imported die is and prepend it
9845 to the name of the imported die. */
9846 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
9848 if (imported_die
->tag
!= DW_TAG_namespace
9849 && imported_die
->tag
!= DW_TAG_module
)
9851 imported_declaration
= imported_name
;
9852 canonical_name
= imported_name_prefix
;
9854 else if (strlen (imported_name_prefix
) > 0)
9855 canonical_name
= obconcat (&objfile
->objfile_obstack
,
9856 imported_name_prefix
,
9857 (cu
->language
== language_d
? "." : "::"),
9858 imported_name
, (char *) NULL
);
9860 canonical_name
= imported_name
;
9862 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
9863 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9864 child_die
= sibling_die (child_die
))
9866 /* DWARF-4: A Fortran use statement with a “rename list” may be
9867 represented by an imported module entry with an import attribute
9868 referring to the module and owned entries corresponding to those
9869 entities that are renamed as part of being imported. */
9871 if (child_die
->tag
!= DW_TAG_imported_declaration
)
9873 complaint (&symfile_complaints
,
9874 _("child DW_TAG_imported_declaration expected "
9875 "- DIE at 0x%x [in module %s]"),
9876 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9880 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
9881 if (import_attr
== NULL
)
9883 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9884 dwarf_tag_name (child_die
->tag
));
9889 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9891 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9892 if (imported_name
== NULL
)
9894 complaint (&symfile_complaints
,
9895 _("child DW_TAG_imported_declaration has unknown "
9896 "imported name - DIE at 0x%x [in module %s]"),
9897 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9901 excludes
.push_back (imported_name
);
9903 process_die (child_die
, cu
);
9906 add_using_directive (using_directives (cu
->language
),
9910 imported_declaration
,
9913 &objfile
->objfile_obstack
);
9916 /* ICC<14 does not output the required DW_AT_declaration on incomplete
9917 types, but gives them a size of zero. Starting with version 14,
9918 ICC is compatible with GCC. */
9921 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
9923 if (!cu
->checked_producer
)
9924 check_producer (cu
);
9926 return cu
->producer_is_icc_lt_14
;
9929 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9930 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9931 this, it was first present in GCC release 4.3.0. */
9934 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9936 if (!cu
->checked_producer
)
9937 check_producer (cu
);
9939 return cu
->producer_is_gcc_lt_4_3
;
9942 static file_and_directory
9943 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
9945 file_and_directory res
;
9947 /* Find the filename. Do not use dwarf2_name here, since the filename
9948 is not a source language identifier. */
9949 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9950 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9952 if (res
.comp_dir
== NULL
9953 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
9954 && IS_ABSOLUTE_PATH (res
.name
))
9956 res
.comp_dir_storage
= ldirname (res
.name
);
9957 if (!res
.comp_dir_storage
.empty ())
9958 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
9960 if (res
.comp_dir
!= NULL
)
9962 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9963 directory, get rid of it. */
9964 const char *cp
= strchr (res
.comp_dir
, ':');
9966 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9967 res
.comp_dir
= cp
+ 1;
9970 if (res
.name
== NULL
)
9971 res
.name
= "<unknown>";
9976 /* Handle DW_AT_stmt_list for a compilation unit.
9977 DIE is the DW_TAG_compile_unit die for CU.
9978 COMP_DIR is the compilation directory. LOWPC is passed to
9979 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9982 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9983 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9985 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9986 struct attribute
*attr
;
9987 struct line_header line_header_local
;
9988 hashval_t line_header_local_hash
;
9993 gdb_assert (! cu
->per_cu
->is_debug_types
);
9995 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9999 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10001 /* The line header hash table is only created if needed (it exists to
10002 prevent redundant reading of the line table for partial_units).
10003 If we're given a partial_unit, we'll need it. If we're given a
10004 compile_unit, then use the line header hash table if it's already
10005 created, but don't create one just yet. */
10007 if (dwarf2_per_objfile
->line_header_hash
== NULL
10008 && die
->tag
== DW_TAG_partial_unit
)
10010 dwarf2_per_objfile
->line_header_hash
10011 = htab_create_alloc_ex (127, line_header_hash_voidp
,
10012 line_header_eq_voidp
,
10013 free_line_header_voidp
,
10014 &objfile
->objfile_obstack
,
10015 hashtab_obstack_allocate
,
10016 dummy_obstack_deallocate
);
10019 line_header_local
.sect_off
= line_offset
;
10020 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10021 line_header_local_hash
= line_header_hash (&line_header_local
);
10022 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
10024 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
10025 &line_header_local
,
10026 line_header_local_hash
, NO_INSERT
);
10028 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10029 is not present in *SLOT (since if there is something in *SLOT then
10030 it will be for a partial_unit). */
10031 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10033 gdb_assert (*slot
!= NULL
);
10034 cu
->line_header
= (struct line_header
*) *slot
;
10039 /* dwarf_decode_line_header does not yet provide sufficient information.
10040 We always have to call also dwarf_decode_lines for it. */
10041 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10045 cu
->line_header
= lh
.release ();
10046 cu
->line_header_die_owner
= die
;
10048 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
10052 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
10053 &line_header_local
,
10054 line_header_local_hash
, INSERT
);
10055 gdb_assert (slot
!= NULL
);
10057 if (slot
!= NULL
&& *slot
== NULL
)
10059 /* This newly decoded line number information unit will be owned
10060 by line_header_hash hash table. */
10061 *slot
= cu
->line_header
;
10062 cu
->line_header_die_owner
= NULL
;
10066 /* We cannot free any current entry in (*slot) as that struct line_header
10067 may be already used by multiple CUs. Create only temporary decoded
10068 line_header for this CU - it may happen at most once for each line
10069 number information unit. And if we're not using line_header_hash
10070 then this is what we want as well. */
10071 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10073 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10074 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10079 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10082 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10084 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10085 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10086 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10087 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10088 struct attribute
*attr
;
10089 struct die_info
*child_die
;
10090 CORE_ADDR baseaddr
;
10092 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10094 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10096 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10097 from finish_block. */
10098 if (lowpc
== ((CORE_ADDR
) -1))
10100 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10102 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10104 prepare_one_comp_unit (cu
, die
, cu
->language
);
10106 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10107 standardised yet. As a workaround for the language detection we fall
10108 back to the DW_AT_producer string. */
10109 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10110 cu
->language
= language_opencl
;
10112 /* Similar hack for Go. */
10113 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10114 set_cu_language (DW_LANG_Go
, cu
);
10116 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
10118 /* Decode line number information if present. We do this before
10119 processing child DIEs, so that the line header table is available
10120 for DW_AT_decl_file. */
10121 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10123 /* Process all dies in compilation unit. */
10124 if (die
->child
!= NULL
)
10126 child_die
= die
->child
;
10127 while (child_die
&& child_die
->tag
)
10129 process_die (child_die
, cu
);
10130 child_die
= sibling_die (child_die
);
10134 /* Decode macro information, if present. Dwarf 2 macro information
10135 refers to information in the line number info statement program
10136 header, so we can only read it if we've read the header
10138 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10140 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10141 if (attr
&& cu
->line_header
)
10143 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10144 complaint (&symfile_complaints
,
10145 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10147 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10151 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10152 if (attr
&& cu
->line_header
)
10154 unsigned int macro_offset
= DW_UNSND (attr
);
10156 dwarf_decode_macros (cu
, macro_offset
, 0);
10161 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
10162 Create the set of symtabs used by this TU, or if this TU is sharing
10163 symtabs with another TU and the symtabs have already been created
10164 then restore those symtabs in the line header.
10165 We don't need the pc/line-number mapping for type units. */
10168 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
10170 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
10171 struct type_unit_group
*tu_group
;
10173 struct attribute
*attr
;
10175 struct signatured_type
*sig_type
;
10177 gdb_assert (per_cu
->is_debug_types
);
10178 sig_type
= (struct signatured_type
*) per_cu
;
10180 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10182 /* If we're using .gdb_index (includes -readnow) then
10183 per_cu->type_unit_group may not have been set up yet. */
10184 if (sig_type
->type_unit_group
== NULL
)
10185 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
10186 tu_group
= sig_type
->type_unit_group
;
10188 /* If we've already processed this stmt_list there's no real need to
10189 do it again, we could fake it and just recreate the part we need
10190 (file name,index -> symtab mapping). If data shows this optimization
10191 is useful we can do it then. */
10192 first_time
= tu_group
->compunit_symtab
== NULL
;
10194 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
10199 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10200 lh
= dwarf_decode_line_header (line_offset
, cu
);
10205 dwarf2_start_symtab (cu
, "", NULL
, 0);
10208 gdb_assert (tu_group
->symtabs
== NULL
);
10209 restart_symtab (tu_group
->compunit_symtab
, "", 0);
10214 cu
->line_header
= lh
.release ();
10215 cu
->line_header_die_owner
= die
;
10219 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
10221 /* Note: We don't assign tu_group->compunit_symtab yet because we're
10222 still initializing it, and our caller (a few levels up)
10223 process_full_type_unit still needs to know if this is the first
10226 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
10227 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
10228 cu
->line_header
->file_names
.size ());
10230 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
10232 file_entry
&fe
= cu
->line_header
->file_names
[i
];
10234 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
10236 if (current_subfile
->symtab
== NULL
)
10238 /* NOTE: start_subfile will recognize when it's been
10239 passed a file it has already seen. So we can't
10240 assume there's a simple mapping from
10241 cu->line_header->file_names to subfiles, plus
10242 cu->line_header->file_names may contain dups. */
10243 current_subfile
->symtab
10244 = allocate_symtab (cust
, current_subfile
->name
);
10247 fe
.symtab
= current_subfile
->symtab
;
10248 tu_group
->symtabs
[i
] = fe
.symtab
;
10253 restart_symtab (tu_group
->compunit_symtab
, "", 0);
10255 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
10257 file_entry
&fe
= cu
->line_header
->file_names
[i
];
10259 fe
.symtab
= tu_group
->symtabs
[i
];
10263 /* The main symtab is allocated last. Type units don't have DW_AT_name
10264 so they don't have a "real" (so to speak) symtab anyway.
10265 There is later code that will assign the main symtab to all symbols
10266 that don't have one. We need to handle the case of a symbol with a
10267 missing symtab (DW_AT_decl_file) anyway. */
10270 /* Process DW_TAG_type_unit.
10271 For TUs we want to skip the first top level sibling if it's not the
10272 actual type being defined by this TU. In this case the first top
10273 level sibling is there to provide context only. */
10276 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10278 struct die_info
*child_die
;
10280 prepare_one_comp_unit (cu
, die
, language_minimal
);
10282 /* Initialize (or reinitialize) the machinery for building symtabs.
10283 We do this before processing child DIEs, so that the line header table
10284 is available for DW_AT_decl_file. */
10285 setup_type_unit_groups (die
, cu
);
10287 if (die
->child
!= NULL
)
10289 child_die
= die
->child
;
10290 while (child_die
&& child_die
->tag
)
10292 process_die (child_die
, cu
);
10293 child_die
= sibling_die (child_die
);
10300 http://gcc.gnu.org/wiki/DebugFission
10301 http://gcc.gnu.org/wiki/DebugFissionDWP
10303 To simplify handling of both DWO files ("object" files with the DWARF info)
10304 and DWP files (a file with the DWOs packaged up into one file), we treat
10305 DWP files as having a collection of virtual DWO files. */
10308 hash_dwo_file (const void *item
)
10310 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
10313 hash
= htab_hash_string (dwo_file
->dwo_name
);
10314 if (dwo_file
->comp_dir
!= NULL
)
10315 hash
+= htab_hash_string (dwo_file
->comp_dir
);
10320 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
10322 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
10323 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
10325 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
10327 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
10328 return lhs
->comp_dir
== rhs
->comp_dir
;
10329 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
10332 /* Allocate a hash table for DWO files. */
10335 allocate_dwo_file_hash_table (void)
10337 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10339 return htab_create_alloc_ex (41,
10343 &objfile
->objfile_obstack
,
10344 hashtab_obstack_allocate
,
10345 dummy_obstack_deallocate
);
10348 /* Lookup DWO file DWO_NAME. */
10351 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
10353 struct dwo_file find_entry
;
10356 if (dwarf2_per_objfile
->dwo_files
== NULL
)
10357 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
10359 memset (&find_entry
, 0, sizeof (find_entry
));
10360 find_entry
.dwo_name
= dwo_name
;
10361 find_entry
.comp_dir
= comp_dir
;
10362 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
10368 hash_dwo_unit (const void *item
)
10370 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10372 /* This drops the top 32 bits of the id, but is ok for a hash. */
10373 return dwo_unit
->signature
;
10377 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
10379 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
10380 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
10382 /* The signature is assumed to be unique within the DWO file.
10383 So while object file CU dwo_id's always have the value zero,
10384 that's OK, assuming each object file DWO file has only one CU,
10385 and that's the rule for now. */
10386 return lhs
->signature
== rhs
->signature
;
10389 /* Allocate a hash table for DWO CUs,TUs.
10390 There is one of these tables for each of CUs,TUs for each DWO file. */
10393 allocate_dwo_unit_table (struct objfile
*objfile
)
10395 /* Start out with a pretty small number.
10396 Generally DWO files contain only one CU and maybe some TUs. */
10397 return htab_create_alloc_ex (3,
10401 &objfile
->objfile_obstack
,
10402 hashtab_obstack_allocate
,
10403 dummy_obstack_deallocate
);
10406 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
10408 struct create_dwo_cu_data
10410 struct dwo_file
*dwo_file
;
10411 struct dwo_unit dwo_unit
;
10414 /* die_reader_func for create_dwo_cu. */
10417 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
10418 const gdb_byte
*info_ptr
,
10419 struct die_info
*comp_unit_die
,
10423 struct dwarf2_cu
*cu
= reader
->cu
;
10424 sect_offset sect_off
= cu
->per_cu
->sect_off
;
10425 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
10426 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
10427 struct dwo_file
*dwo_file
= data
->dwo_file
;
10428 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
10429 struct attribute
*attr
;
10431 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
10434 complaint (&symfile_complaints
,
10435 _("Dwarf Error: debug entry at offset 0x%x is missing"
10436 " its dwo_id [in module %s]"),
10437 to_underlying (sect_off
), dwo_file
->dwo_name
);
10441 dwo_unit
->dwo_file
= dwo_file
;
10442 dwo_unit
->signature
= DW_UNSND (attr
);
10443 dwo_unit
->section
= section
;
10444 dwo_unit
->sect_off
= sect_off
;
10445 dwo_unit
->length
= cu
->per_cu
->length
;
10447 if (dwarf_read_debug
)
10448 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
10449 to_underlying (sect_off
),
10450 hex_string (dwo_unit
->signature
));
10453 /* Create the dwo_units for the CUs in a DWO_FILE.
10454 Note: This function processes DWO files only, not DWP files. */
10457 create_cus_hash_table (struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
10460 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10461 const struct dwarf2_section_info
*abbrev_section
= &dwo_file
.sections
.abbrev
;
10462 const gdb_byte
*info_ptr
, *end_ptr
;
10464 dwarf2_read_section (objfile
, §ion
);
10465 info_ptr
= section
.buffer
;
10467 if (info_ptr
== NULL
)
10470 if (dwarf_read_debug
)
10472 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
10473 get_section_name (§ion
),
10474 get_section_file_name (§ion
));
10477 end_ptr
= info_ptr
+ section
.size
;
10478 while (info_ptr
< end_ptr
)
10480 struct dwarf2_per_cu_data per_cu
;
10481 struct create_dwo_cu_data create_dwo_cu_data
;
10482 struct dwo_unit
*dwo_unit
;
10484 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
10486 memset (&create_dwo_cu_data
.dwo_unit
, 0,
10487 sizeof (create_dwo_cu_data
.dwo_unit
));
10488 memset (&per_cu
, 0, sizeof (per_cu
));
10489 per_cu
.objfile
= objfile
;
10490 per_cu
.is_debug_types
= 0;
10491 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
10492 per_cu
.section
= §ion
;
10493 create_dwo_cu_data
.dwo_file
= &dwo_file
;
10495 init_cutu_and_read_dies_no_follow (
10496 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
10497 info_ptr
+= per_cu
.length
;
10499 // If the unit could not be parsed, skip it.
10500 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
10503 if (cus_htab
== NULL
)
10504 cus_htab
= allocate_dwo_unit_table (objfile
);
10506 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10507 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
10508 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
10509 gdb_assert (slot
!= NULL
);
10512 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
10513 sect_offset dup_sect_off
= dup_cu
->sect_off
;
10515 complaint (&symfile_complaints
,
10516 _("debug cu entry at offset 0x%x is duplicate to"
10517 " the entry at offset 0x%x, signature %s"),
10518 to_underlying (sect_off
), to_underlying (dup_sect_off
),
10519 hex_string (dwo_unit
->signature
));
10521 *slot
= (void *)dwo_unit
;
10525 /* DWP file .debug_{cu,tu}_index section format:
10526 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
10530 Both index sections have the same format, and serve to map a 64-bit
10531 signature to a set of section numbers. Each section begins with a header,
10532 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
10533 indexes, and a pool of 32-bit section numbers. The index sections will be
10534 aligned at 8-byte boundaries in the file.
10536 The index section header consists of:
10538 V, 32 bit version number
10540 N, 32 bit number of compilation units or type units in the index
10541 M, 32 bit number of slots in the hash table
10543 Numbers are recorded using the byte order of the application binary.
10545 The hash table begins at offset 16 in the section, and consists of an array
10546 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
10547 order of the application binary). Unused slots in the hash table are 0.
10548 (We rely on the extreme unlikeliness of a signature being exactly 0.)
10550 The parallel table begins immediately after the hash table
10551 (at offset 16 + 8 * M from the beginning of the section), and consists of an
10552 array of 32-bit indexes (using the byte order of the application binary),
10553 corresponding 1-1 with slots in the hash table. Each entry in the parallel
10554 table contains a 32-bit index into the pool of section numbers. For unused
10555 hash table slots, the corresponding entry in the parallel table will be 0.
10557 The pool of section numbers begins immediately following the hash table
10558 (at offset 16 + 12 * M from the beginning of the section). The pool of
10559 section numbers consists of an array of 32-bit words (using the byte order
10560 of the application binary). Each item in the array is indexed starting
10561 from 0. The hash table entry provides the index of the first section
10562 number in the set. Additional section numbers in the set follow, and the
10563 set is terminated by a 0 entry (section number 0 is not used in ELF).
10565 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
10566 section must be the first entry in the set, and the .debug_abbrev.dwo must
10567 be the second entry. Other members of the set may follow in any order.
10573 DWP Version 2 combines all the .debug_info, etc. sections into one,
10574 and the entries in the index tables are now offsets into these sections.
10575 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
10578 Index Section Contents:
10580 Hash Table of Signatures dwp_hash_table.hash_table
10581 Parallel Table of Indices dwp_hash_table.unit_table
10582 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
10583 Table of Section Sizes dwp_hash_table.v2.sizes
10585 The index section header consists of:
10587 V, 32 bit version number
10588 L, 32 bit number of columns in the table of section offsets
10589 N, 32 bit number of compilation units or type units in the index
10590 M, 32 bit number of slots in the hash table
10592 Numbers are recorded using the byte order of the application binary.
10594 The hash table has the same format as version 1.
10595 The parallel table of indices has the same format as version 1,
10596 except that the entries are origin-1 indices into the table of sections
10597 offsets and the table of section sizes.
10599 The table of offsets begins immediately following the parallel table
10600 (at offset 16 + 12 * M from the beginning of the section). The table is
10601 a two-dimensional array of 32-bit words (using the byte order of the
10602 application binary), with L columns and N+1 rows, in row-major order.
10603 Each row in the array is indexed starting from 0. The first row provides
10604 a key to the remaining rows: each column in this row provides an identifier
10605 for a debug section, and the offsets in the same column of subsequent rows
10606 refer to that section. The section identifiers are:
10608 DW_SECT_INFO 1 .debug_info.dwo
10609 DW_SECT_TYPES 2 .debug_types.dwo
10610 DW_SECT_ABBREV 3 .debug_abbrev.dwo
10611 DW_SECT_LINE 4 .debug_line.dwo
10612 DW_SECT_LOC 5 .debug_loc.dwo
10613 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
10614 DW_SECT_MACINFO 7 .debug_macinfo.dwo
10615 DW_SECT_MACRO 8 .debug_macro.dwo
10617 The offsets provided by the CU and TU index sections are the base offsets
10618 for the contributions made by each CU or TU to the corresponding section
10619 in the package file. Each CU and TU header contains an abbrev_offset
10620 field, used to find the abbreviations table for that CU or TU within the
10621 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
10622 be interpreted as relative to the base offset given in the index section.
10623 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
10624 should be interpreted as relative to the base offset for .debug_line.dwo,
10625 and offsets into other debug sections obtained from DWARF attributes should
10626 also be interpreted as relative to the corresponding base offset.
10628 The table of sizes begins immediately following the table of offsets.
10629 Like the table of offsets, it is a two-dimensional array of 32-bit words,
10630 with L columns and N rows, in row-major order. Each row in the array is
10631 indexed starting from 1 (row 0 is shared by the two tables).
10635 Hash table lookup is handled the same in version 1 and 2:
10637 We assume that N and M will not exceed 2^32 - 1.
10638 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
10640 Given a 64-bit compilation unit signature or a type signature S, an entry
10641 in the hash table is located as follows:
10643 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
10644 the low-order k bits all set to 1.
10646 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
10648 3) If the hash table entry at index H matches the signature, use that
10649 entry. If the hash table entry at index H is unused (all zeroes),
10650 terminate the search: the signature is not present in the table.
10652 4) Let H = (H + H') modulo M. Repeat at Step 3.
10654 Because M > N and H' and M are relatively prime, the search is guaranteed
10655 to stop at an unused slot or find the match. */
10657 /* Create a hash table to map DWO IDs to their CU/TU entry in
10658 .debug_{info,types}.dwo in DWP_FILE.
10659 Returns NULL if there isn't one.
10660 Note: This function processes DWP files only, not DWO files. */
10662 static struct dwp_hash_table
*
10663 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
10665 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10666 bfd
*dbfd
= dwp_file
->dbfd
;
10667 const gdb_byte
*index_ptr
, *index_end
;
10668 struct dwarf2_section_info
*index
;
10669 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
10670 struct dwp_hash_table
*htab
;
10672 if (is_debug_types
)
10673 index
= &dwp_file
->sections
.tu_index
;
10675 index
= &dwp_file
->sections
.cu_index
;
10677 if (dwarf2_section_empty_p (index
))
10679 dwarf2_read_section (objfile
, index
);
10681 index_ptr
= index
->buffer
;
10682 index_end
= index_ptr
+ index
->size
;
10684 version
= read_4_bytes (dbfd
, index_ptr
);
10687 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
10691 nr_units
= read_4_bytes (dbfd
, index_ptr
);
10693 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
10696 if (version
!= 1 && version
!= 2)
10698 error (_("Dwarf Error: unsupported DWP file version (%s)"
10699 " [in module %s]"),
10700 pulongest (version
), dwp_file
->name
);
10702 if (nr_slots
!= (nr_slots
& -nr_slots
))
10704 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
10705 " is not power of 2 [in module %s]"),
10706 pulongest (nr_slots
), dwp_file
->name
);
10709 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
10710 htab
->version
= version
;
10711 htab
->nr_columns
= nr_columns
;
10712 htab
->nr_units
= nr_units
;
10713 htab
->nr_slots
= nr_slots
;
10714 htab
->hash_table
= index_ptr
;
10715 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
10717 /* Exit early if the table is empty. */
10718 if (nr_slots
== 0 || nr_units
== 0
10719 || (version
== 2 && nr_columns
== 0))
10721 /* All must be zero. */
10722 if (nr_slots
!= 0 || nr_units
!= 0
10723 || (version
== 2 && nr_columns
!= 0))
10725 complaint (&symfile_complaints
,
10726 _("Empty DWP but nr_slots,nr_units,nr_columns not"
10727 " all zero [in modules %s]"),
10735 htab
->section_pool
.v1
.indices
=
10736 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10737 /* It's harder to decide whether the section is too small in v1.
10738 V1 is deprecated anyway so we punt. */
10742 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10743 int *ids
= htab
->section_pool
.v2
.section_ids
;
10744 /* Reverse map for error checking. */
10745 int ids_seen
[DW_SECT_MAX
+ 1];
10748 if (nr_columns
< 2)
10750 error (_("Dwarf Error: bad DWP hash table, too few columns"
10751 " in section table [in module %s]"),
10754 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
10756 error (_("Dwarf Error: bad DWP hash table, too many columns"
10757 " in section table [in module %s]"),
10760 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10761 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10762 for (i
= 0; i
< nr_columns
; ++i
)
10764 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
10766 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
10768 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
10769 " in section table [in module %s]"),
10770 id
, dwp_file
->name
);
10772 if (ids_seen
[id
] != -1)
10774 error (_("Dwarf Error: bad DWP hash table, duplicate section"
10775 " id %d in section table [in module %s]"),
10776 id
, dwp_file
->name
);
10781 /* Must have exactly one info or types section. */
10782 if (((ids_seen
[DW_SECT_INFO
] != -1)
10783 + (ids_seen
[DW_SECT_TYPES
] != -1))
10786 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
10787 " DWO info/types section [in module %s]"),
10790 /* Must have an abbrev section. */
10791 if (ids_seen
[DW_SECT_ABBREV
] == -1)
10793 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
10794 " section [in module %s]"),
10797 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
10798 htab
->section_pool
.v2
.sizes
=
10799 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
10800 * nr_units
* nr_columns
);
10801 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
10802 * nr_units
* nr_columns
))
10805 error (_("Dwarf Error: DWP index section is corrupt (too small)"
10806 " [in module %s]"),
10814 /* Update SECTIONS with the data from SECTP.
10816 This function is like the other "locate" section routines that are
10817 passed to bfd_map_over_sections, but in this context the sections to
10818 read comes from the DWP V1 hash table, not the full ELF section table.
10820 The result is non-zero for success, or zero if an error was found. */
10823 locate_v1_virtual_dwo_sections (asection
*sectp
,
10824 struct virtual_v1_dwo_sections
*sections
)
10826 const struct dwop_section_names
*names
= &dwop_section_names
;
10828 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10830 /* There can be only one. */
10831 if (sections
->abbrev
.s
.section
!= NULL
)
10833 sections
->abbrev
.s
.section
= sectp
;
10834 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10836 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
10837 || section_is_p (sectp
->name
, &names
->types_dwo
))
10839 /* There can be only one. */
10840 if (sections
->info_or_types
.s
.section
!= NULL
)
10842 sections
->info_or_types
.s
.section
= sectp
;
10843 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
10845 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10847 /* There can be only one. */
10848 if (sections
->line
.s
.section
!= NULL
)
10850 sections
->line
.s
.section
= sectp
;
10851 sections
->line
.size
= bfd_get_section_size (sectp
);
10853 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10855 /* There can be only one. */
10856 if (sections
->loc
.s
.section
!= NULL
)
10858 sections
->loc
.s
.section
= sectp
;
10859 sections
->loc
.size
= bfd_get_section_size (sectp
);
10861 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10863 /* There can be only one. */
10864 if (sections
->macinfo
.s
.section
!= NULL
)
10866 sections
->macinfo
.s
.section
= sectp
;
10867 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10869 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10871 /* There can be only one. */
10872 if (sections
->macro
.s
.section
!= NULL
)
10874 sections
->macro
.s
.section
= sectp
;
10875 sections
->macro
.size
= bfd_get_section_size (sectp
);
10877 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10879 /* There can be only one. */
10880 if (sections
->str_offsets
.s
.section
!= NULL
)
10882 sections
->str_offsets
.s
.section
= sectp
;
10883 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10887 /* No other kind of section is valid. */
10894 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10895 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10896 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10897 This is for DWP version 1 files. */
10899 static struct dwo_unit
*
10900 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10901 uint32_t unit_index
,
10902 const char *comp_dir
,
10903 ULONGEST signature
, int is_debug_types
)
10905 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10906 const struct dwp_hash_table
*dwp_htab
=
10907 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10908 bfd
*dbfd
= dwp_file
->dbfd
;
10909 const char *kind
= is_debug_types
? "TU" : "CU";
10910 struct dwo_file
*dwo_file
;
10911 struct dwo_unit
*dwo_unit
;
10912 struct virtual_v1_dwo_sections sections
;
10913 void **dwo_file_slot
;
10916 gdb_assert (dwp_file
->version
== 1);
10918 if (dwarf_read_debug
)
10920 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10922 pulongest (unit_index
), hex_string (signature
),
10926 /* Fetch the sections of this DWO unit.
10927 Put a limit on the number of sections we look for so that bad data
10928 doesn't cause us to loop forever. */
10930 #define MAX_NR_V1_DWO_SECTIONS \
10931 (1 /* .debug_info or .debug_types */ \
10932 + 1 /* .debug_abbrev */ \
10933 + 1 /* .debug_line */ \
10934 + 1 /* .debug_loc */ \
10935 + 1 /* .debug_str_offsets */ \
10936 + 1 /* .debug_macro or .debug_macinfo */ \
10937 + 1 /* trailing zero */)
10939 memset (§ions
, 0, sizeof (sections
));
10941 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10944 uint32_t section_nr
=
10945 read_4_bytes (dbfd
,
10946 dwp_htab
->section_pool
.v1
.indices
10947 + (unit_index
+ i
) * sizeof (uint32_t));
10949 if (section_nr
== 0)
10951 if (section_nr
>= dwp_file
->num_sections
)
10953 error (_("Dwarf Error: bad DWP hash table, section number too large"
10954 " [in module %s]"),
10958 sectp
= dwp_file
->elf_sections
[section_nr
];
10959 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10961 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10962 " [in module %s]"),
10968 || dwarf2_section_empty_p (§ions
.info_or_types
)
10969 || dwarf2_section_empty_p (§ions
.abbrev
))
10971 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10972 " [in module %s]"),
10975 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10977 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10978 " [in module %s]"),
10982 /* It's easier for the rest of the code if we fake a struct dwo_file and
10983 have dwo_unit "live" in that. At least for now.
10985 The DWP file can be made up of a random collection of CUs and TUs.
10986 However, for each CU + set of TUs that came from the same original DWO
10987 file, we can combine them back into a virtual DWO file to save space
10988 (fewer struct dwo_file objects to allocate). Remember that for really
10989 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10991 std::string virtual_dwo_name
=
10992 string_printf ("virtual-dwo/%d-%d-%d-%d",
10993 get_section_id (§ions
.abbrev
),
10994 get_section_id (§ions
.line
),
10995 get_section_id (§ions
.loc
),
10996 get_section_id (§ions
.str_offsets
));
10997 /* Can we use an existing virtual DWO file? */
10998 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
10999 /* Create one if necessary. */
11000 if (*dwo_file_slot
== NULL
)
11002 if (dwarf_read_debug
)
11004 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11005 virtual_dwo_name
.c_str ());
11007 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11009 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
11010 virtual_dwo_name
.c_str (),
11011 virtual_dwo_name
.size ());
11012 dwo_file
->comp_dir
= comp_dir
;
11013 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11014 dwo_file
->sections
.line
= sections
.line
;
11015 dwo_file
->sections
.loc
= sections
.loc
;
11016 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11017 dwo_file
->sections
.macro
= sections
.macro
;
11018 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11019 /* The "str" section is global to the entire DWP file. */
11020 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11021 /* The info or types section is assigned below to dwo_unit,
11022 there's no need to record it in dwo_file.
11023 Also, we can't simply record type sections in dwo_file because
11024 we record a pointer into the vector in dwo_unit. As we collect more
11025 types we'll grow the vector and eventually have to reallocate space
11026 for it, invalidating all copies of pointers into the previous
11028 *dwo_file_slot
= dwo_file
;
11032 if (dwarf_read_debug
)
11034 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11035 virtual_dwo_name
.c_str ());
11037 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11040 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11041 dwo_unit
->dwo_file
= dwo_file
;
11042 dwo_unit
->signature
= signature
;
11043 dwo_unit
->section
=
11044 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11045 *dwo_unit
->section
= sections
.info_or_types
;
11046 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11051 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11052 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11053 piece within that section used by a TU/CU, return a virtual section
11054 of just that piece. */
11056 static struct dwarf2_section_info
11057 create_dwp_v2_section (struct dwarf2_section_info
*section
,
11058 bfd_size_type offset
, bfd_size_type size
)
11060 struct dwarf2_section_info result
;
11063 gdb_assert (section
!= NULL
);
11064 gdb_assert (!section
->is_virtual
);
11066 memset (&result
, 0, sizeof (result
));
11067 result
.s
.containing_section
= section
;
11068 result
.is_virtual
= 1;
11073 sectp
= get_section_bfd_section (section
);
11075 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11076 bounds of the real section. This is a pretty-rare event, so just
11077 flag an error (easier) instead of a warning and trying to cope. */
11079 || offset
+ size
> bfd_get_section_size (sectp
))
11081 bfd
*abfd
= sectp
->owner
;
11083 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11084 " in section %s [in module %s]"),
11085 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
11086 objfile_name (dwarf2_per_objfile
->objfile
));
11089 result
.virtual_offset
= offset
;
11090 result
.size
= size
;
11094 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11095 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11096 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11097 This is for DWP version 2 files. */
11099 static struct dwo_unit
*
11100 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
11101 uint32_t unit_index
,
11102 const char *comp_dir
,
11103 ULONGEST signature
, int is_debug_types
)
11105 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11106 const struct dwp_hash_table
*dwp_htab
=
11107 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11108 bfd
*dbfd
= dwp_file
->dbfd
;
11109 const char *kind
= is_debug_types
? "TU" : "CU";
11110 struct dwo_file
*dwo_file
;
11111 struct dwo_unit
*dwo_unit
;
11112 struct virtual_v2_dwo_sections sections
;
11113 void **dwo_file_slot
;
11116 gdb_assert (dwp_file
->version
== 2);
11118 if (dwarf_read_debug
)
11120 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11122 pulongest (unit_index
), hex_string (signature
),
11126 /* Fetch the section offsets of this DWO unit. */
11128 memset (§ions
, 0, sizeof (sections
));
11130 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11132 uint32_t offset
= read_4_bytes (dbfd
,
11133 dwp_htab
->section_pool
.v2
.offsets
11134 + (((unit_index
- 1) * dwp_htab
->nr_columns
11136 * sizeof (uint32_t)));
11137 uint32_t size
= read_4_bytes (dbfd
,
11138 dwp_htab
->section_pool
.v2
.sizes
11139 + (((unit_index
- 1) * dwp_htab
->nr_columns
11141 * sizeof (uint32_t)));
11143 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11146 case DW_SECT_TYPES
:
11147 sections
.info_or_types_offset
= offset
;
11148 sections
.info_or_types_size
= size
;
11150 case DW_SECT_ABBREV
:
11151 sections
.abbrev_offset
= offset
;
11152 sections
.abbrev_size
= size
;
11155 sections
.line_offset
= offset
;
11156 sections
.line_size
= size
;
11159 sections
.loc_offset
= offset
;
11160 sections
.loc_size
= size
;
11162 case DW_SECT_STR_OFFSETS
:
11163 sections
.str_offsets_offset
= offset
;
11164 sections
.str_offsets_size
= size
;
11166 case DW_SECT_MACINFO
:
11167 sections
.macinfo_offset
= offset
;
11168 sections
.macinfo_size
= size
;
11170 case DW_SECT_MACRO
:
11171 sections
.macro_offset
= offset
;
11172 sections
.macro_size
= size
;
11177 /* It's easier for the rest of the code if we fake a struct dwo_file and
11178 have dwo_unit "live" in that. At least for now.
11180 The DWP file can be made up of a random collection of CUs and TUs.
11181 However, for each CU + set of TUs that came from the same original DWO
11182 file, we can combine them back into a virtual DWO file to save space
11183 (fewer struct dwo_file objects to allocate). Remember that for really
11184 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11186 std::string virtual_dwo_name
=
11187 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
11188 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
11189 (long) (sections
.line_size
? sections
.line_offset
: 0),
11190 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
11191 (long) (sections
.str_offsets_size
11192 ? sections
.str_offsets_offset
: 0));
11193 /* Can we use an existing virtual DWO file? */
11194 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
.c_str (), comp_dir
);
11195 /* Create one if necessary. */
11196 if (*dwo_file_slot
== NULL
)
11198 if (dwarf_read_debug
)
11200 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11201 virtual_dwo_name
.c_str ());
11203 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11205 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
11206 virtual_dwo_name
.c_str (),
11207 virtual_dwo_name
.size ());
11208 dwo_file
->comp_dir
= comp_dir
;
11209 dwo_file
->sections
.abbrev
=
11210 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
11211 sections
.abbrev_offset
, sections
.abbrev_size
);
11212 dwo_file
->sections
.line
=
11213 create_dwp_v2_section (&dwp_file
->sections
.line
,
11214 sections
.line_offset
, sections
.line_size
);
11215 dwo_file
->sections
.loc
=
11216 create_dwp_v2_section (&dwp_file
->sections
.loc
,
11217 sections
.loc_offset
, sections
.loc_size
);
11218 dwo_file
->sections
.macinfo
=
11219 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
11220 sections
.macinfo_offset
, sections
.macinfo_size
);
11221 dwo_file
->sections
.macro
=
11222 create_dwp_v2_section (&dwp_file
->sections
.macro
,
11223 sections
.macro_offset
, sections
.macro_size
);
11224 dwo_file
->sections
.str_offsets
=
11225 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
11226 sections
.str_offsets_offset
,
11227 sections
.str_offsets_size
);
11228 /* The "str" section is global to the entire DWP file. */
11229 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11230 /* The info or types section is assigned below to dwo_unit,
11231 there's no need to record it in dwo_file.
11232 Also, we can't simply record type sections in dwo_file because
11233 we record a pointer into the vector in dwo_unit. As we collect more
11234 types we'll grow the vector and eventually have to reallocate space
11235 for it, invalidating all copies of pointers into the previous
11237 *dwo_file_slot
= dwo_file
;
11241 if (dwarf_read_debug
)
11243 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11244 virtual_dwo_name
.c_str ());
11246 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11249 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11250 dwo_unit
->dwo_file
= dwo_file
;
11251 dwo_unit
->signature
= signature
;
11252 dwo_unit
->section
=
11253 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
11254 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
11255 ? &dwp_file
->sections
.types
11256 : &dwp_file
->sections
.info
,
11257 sections
.info_or_types_offset
,
11258 sections
.info_or_types_size
);
11259 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11264 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
11265 Returns NULL if the signature isn't found. */
11267 static struct dwo_unit
*
11268 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
11269 ULONGEST signature
, int is_debug_types
)
11271 const struct dwp_hash_table
*dwp_htab
=
11272 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11273 bfd
*dbfd
= dwp_file
->dbfd
;
11274 uint32_t mask
= dwp_htab
->nr_slots
- 1;
11275 uint32_t hash
= signature
& mask
;
11276 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
11279 struct dwo_unit find_dwo_cu
;
11281 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
11282 find_dwo_cu
.signature
= signature
;
11283 slot
= htab_find_slot (is_debug_types
11284 ? dwp_file
->loaded_tus
11285 : dwp_file
->loaded_cus
,
11286 &find_dwo_cu
, INSERT
);
11289 return (struct dwo_unit
*) *slot
;
11291 /* Use a for loop so that we don't loop forever on bad debug info. */
11292 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
11294 ULONGEST signature_in_table
;
11296 signature_in_table
=
11297 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
11298 if (signature_in_table
== signature
)
11300 uint32_t unit_index
=
11301 read_4_bytes (dbfd
,
11302 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
11304 if (dwp_file
->version
== 1)
11306 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
11307 comp_dir
, signature
,
11312 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
11313 comp_dir
, signature
,
11316 return (struct dwo_unit
*) *slot
;
11318 if (signature_in_table
== 0)
11320 hash
= (hash
+ hash2
) & mask
;
11323 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
11324 " [in module %s]"),
11328 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
11329 Open the file specified by FILE_NAME and hand it off to BFD for
11330 preliminary analysis. Return a newly initialized bfd *, which
11331 includes a canonicalized copy of FILE_NAME.
11332 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
11333 SEARCH_CWD is true if the current directory is to be searched.
11334 It will be searched before debug-file-directory.
11335 If successful, the file is added to the bfd include table of the
11336 objfile's bfd (see gdb_bfd_record_inclusion).
11337 If unable to find/open the file, return NULL.
11338 NOTE: This function is derived from symfile_bfd_open. */
11340 static gdb_bfd_ref_ptr
11341 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
11344 char *absolute_name
;
11345 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
11346 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
11347 to debug_file_directory. */
11349 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
11353 if (*debug_file_directory
!= '\0')
11354 search_path
= concat (".", dirname_separator_string
,
11355 debug_file_directory
, (char *) NULL
);
11357 search_path
= xstrdup (".");
11360 search_path
= xstrdup (debug_file_directory
);
11362 flags
= OPF_RETURN_REALPATH
;
11364 flags
|= OPF_SEARCH_IN_PATH
;
11365 desc
= openp (search_path
, flags
, file_name
,
11366 O_RDONLY
| O_BINARY
, &absolute_name
);
11367 xfree (search_path
);
11371 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
11372 xfree (absolute_name
);
11373 if (sym_bfd
== NULL
)
11375 bfd_set_cacheable (sym_bfd
.get (), 1);
11377 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
11380 /* Success. Record the bfd as having been included by the objfile's bfd.
11381 This is important because things like demangled_names_hash lives in the
11382 objfile's per_bfd space and may have references to things like symbol
11383 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
11384 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
11389 /* Try to open DWO file FILE_NAME.
11390 COMP_DIR is the DW_AT_comp_dir attribute.
11391 The result is the bfd handle of the file.
11392 If there is a problem finding or opening the file, return NULL.
11393 Upon success, the canonicalized path of the file is stored in the bfd,
11394 same as symfile_bfd_open. */
11396 static gdb_bfd_ref_ptr
11397 open_dwo_file (const char *file_name
, const char *comp_dir
)
11399 if (IS_ABSOLUTE_PATH (file_name
))
11400 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
11402 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
11404 if (comp_dir
!= NULL
)
11406 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
11407 file_name
, (char *) NULL
);
11409 /* NOTE: If comp_dir is a relative path, this will also try the
11410 search path, which seems useful. */
11411 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
11412 1 /*search_cwd*/));
11413 xfree (path_to_try
);
11418 /* That didn't work, try debug-file-directory, which, despite its name,
11419 is a list of paths. */
11421 if (*debug_file_directory
== '\0')
11424 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
11427 /* This function is mapped across the sections and remembers the offset and
11428 size of each of the DWO debugging sections we are interested in. */
11431 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
11433 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
11434 const struct dwop_section_names
*names
= &dwop_section_names
;
11436 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11438 dwo_sections
->abbrev
.s
.section
= sectp
;
11439 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
11441 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11443 dwo_sections
->info
.s
.section
= sectp
;
11444 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
11446 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11448 dwo_sections
->line
.s
.section
= sectp
;
11449 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
11451 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11453 dwo_sections
->loc
.s
.section
= sectp
;
11454 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
11456 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11458 dwo_sections
->macinfo
.s
.section
= sectp
;
11459 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
11461 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11463 dwo_sections
->macro
.s
.section
= sectp
;
11464 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
11466 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
11468 dwo_sections
->str
.s
.section
= sectp
;
11469 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
11471 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11473 dwo_sections
->str_offsets
.s
.section
= sectp
;
11474 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
11476 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11478 struct dwarf2_section_info type_section
;
11480 memset (&type_section
, 0, sizeof (type_section
));
11481 type_section
.s
.section
= sectp
;
11482 type_section
.size
= bfd_get_section_size (sectp
);
11483 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
11488 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
11489 by PER_CU. This is for the non-DWP case.
11490 The result is NULL if DWO_NAME can't be found. */
11492 static struct dwo_file
*
11493 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
11494 const char *dwo_name
, const char *comp_dir
)
11496 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11497 struct dwo_file
*dwo_file
;
11498 struct cleanup
*cleanups
;
11500 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
11503 if (dwarf_read_debug
)
11504 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
11507 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
11508 dwo_file
->dwo_name
= dwo_name
;
11509 dwo_file
->comp_dir
= comp_dir
;
11510 dwo_file
->dbfd
= dbfd
.release ();
11512 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
11514 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
11515 &dwo_file
->sections
);
11517 create_cus_hash_table (*dwo_file
, dwo_file
->sections
.info
, dwo_file
->cus
);
11519 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
11522 discard_cleanups (cleanups
);
11524 if (dwarf_read_debug
)
11525 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
11530 /* This function is mapped across the sections and remembers the offset and
11531 size of each of the DWP debugging sections common to version 1 and 2 that
11532 we are interested in. */
11535 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
11536 void *dwp_file_ptr
)
11538 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11539 const struct dwop_section_names
*names
= &dwop_section_names
;
11540 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11542 /* Record the ELF section number for later lookup: this is what the
11543 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11544 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11545 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11547 /* Look for specific sections that we need. */
11548 if (section_is_p (sectp
->name
, &names
->str_dwo
))
11550 dwp_file
->sections
.str
.s
.section
= sectp
;
11551 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
11553 else if (section_is_p (sectp
->name
, &names
->cu_index
))
11555 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
11556 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
11558 else if (section_is_p (sectp
->name
, &names
->tu_index
))
11560 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
11561 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
11565 /* This function is mapped across the sections and remembers the offset and
11566 size of each of the DWP version 2 debugging sections that we are interested
11567 in. This is split into a separate function because we don't know if we
11568 have version 1 or 2 until we parse the cu_index/tu_index sections. */
11571 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
11573 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11574 const struct dwop_section_names
*names
= &dwop_section_names
;
11575 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11577 /* Record the ELF section number for later lookup: this is what the
11578 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11579 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11580 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11582 /* Look for specific sections that we need. */
11583 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11585 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
11586 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
11588 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11590 dwp_file
->sections
.info
.s
.section
= sectp
;
11591 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
11593 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11595 dwp_file
->sections
.line
.s
.section
= sectp
;
11596 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
11598 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11600 dwp_file
->sections
.loc
.s
.section
= sectp
;
11601 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
11603 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11605 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
11606 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
11608 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11610 dwp_file
->sections
.macro
.s
.section
= sectp
;
11611 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
11613 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11615 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
11616 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
11618 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11620 dwp_file
->sections
.types
.s
.section
= sectp
;
11621 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
11625 /* Hash function for dwp_file loaded CUs/TUs. */
11628 hash_dwp_loaded_cutus (const void *item
)
11630 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11632 /* This drops the top 32 bits of the signature, but is ok for a hash. */
11633 return dwo_unit
->signature
;
11636 /* Equality function for dwp_file loaded CUs/TUs. */
11639 eq_dwp_loaded_cutus (const void *a
, const void *b
)
11641 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
11642 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
11644 return dua
->signature
== dub
->signature
;
11647 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
11650 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
11652 return htab_create_alloc_ex (3,
11653 hash_dwp_loaded_cutus
,
11654 eq_dwp_loaded_cutus
,
11656 &objfile
->objfile_obstack
,
11657 hashtab_obstack_allocate
,
11658 dummy_obstack_deallocate
);
11661 /* Try to open DWP file FILE_NAME.
11662 The result is the bfd handle of the file.
11663 If there is a problem finding or opening the file, return NULL.
11664 Upon success, the canonicalized path of the file is stored in the bfd,
11665 same as symfile_bfd_open. */
11667 static gdb_bfd_ref_ptr
11668 open_dwp_file (const char *file_name
)
11670 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
11671 1 /*search_cwd*/));
11675 /* Work around upstream bug 15652.
11676 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
11677 [Whether that's a "bug" is debatable, but it is getting in our way.]
11678 We have no real idea where the dwp file is, because gdb's realpath-ing
11679 of the executable's path may have discarded the needed info.
11680 [IWBN if the dwp file name was recorded in the executable, akin to
11681 .gnu_debuglink, but that doesn't exist yet.]
11682 Strip the directory from FILE_NAME and search again. */
11683 if (*debug_file_directory
!= '\0')
11685 /* Don't implicitly search the current directory here.
11686 If the user wants to search "." to handle this case,
11687 it must be added to debug-file-directory. */
11688 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
11695 /* Initialize the use of the DWP file for the current objfile.
11696 By convention the name of the DWP file is ${objfile}.dwp.
11697 The result is NULL if it can't be found. */
11699 static struct dwp_file
*
11700 open_and_init_dwp_file (void)
11702 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11703 struct dwp_file
*dwp_file
;
11705 /* Try to find first .dwp for the binary file before any symbolic links
11708 /* If the objfile is a debug file, find the name of the real binary
11709 file and get the name of dwp file from there. */
11710 std::string dwp_name
;
11711 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
11713 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
11714 const char *backlink_basename
= lbasename (backlink
->original_name
);
11716 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
11719 dwp_name
= objfile
->original_name
;
11721 dwp_name
+= ".dwp";
11723 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
.c_str ()));
11725 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
11727 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
11728 dwp_name
= objfile_name (objfile
);
11729 dwp_name
+= ".dwp";
11730 dbfd
= open_dwp_file (dwp_name
.c_str ());
11735 if (dwarf_read_debug
)
11736 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
11739 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
11740 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
11741 dwp_file
->dbfd
= dbfd
.release ();
11743 /* +1: section 0 is unused */
11744 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
11745 dwp_file
->elf_sections
=
11746 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
11747 dwp_file
->num_sections
, asection
*);
11749 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
11752 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
11754 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
11756 /* The DWP file version is stored in the hash table. Oh well. */
11757 if (dwp_file
->cus
&& dwp_file
->tus
11758 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
11760 /* Technically speaking, we should try to limp along, but this is
11761 pretty bizarre. We use pulongest here because that's the established
11762 portability solution (e.g, we cannot use %u for uint32_t). */
11763 error (_("Dwarf Error: DWP file CU version %s doesn't match"
11764 " TU version %s [in DWP file %s]"),
11765 pulongest (dwp_file
->cus
->version
),
11766 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
11770 dwp_file
->version
= dwp_file
->cus
->version
;
11771 else if (dwp_file
->tus
)
11772 dwp_file
->version
= dwp_file
->tus
->version
;
11774 dwp_file
->version
= 2;
11776 if (dwp_file
->version
== 2)
11777 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
11780 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
11781 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
11783 if (dwarf_read_debug
)
11785 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
11786 fprintf_unfiltered (gdb_stdlog
,
11787 " %s CUs, %s TUs\n",
11788 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
11789 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
11795 /* Wrapper around open_and_init_dwp_file, only open it once. */
11797 static struct dwp_file
*
11798 get_dwp_file (void)
11800 if (! dwarf2_per_objfile
->dwp_checked
)
11802 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
11803 dwarf2_per_objfile
->dwp_checked
= 1;
11805 return dwarf2_per_objfile
->dwp_file
;
11808 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
11809 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
11810 or in the DWP file for the objfile, referenced by THIS_UNIT.
11811 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
11812 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
11814 This is called, for example, when wanting to read a variable with a
11815 complex location. Therefore we don't want to do file i/o for every call.
11816 Therefore we don't want to look for a DWO file on every call.
11817 Therefore we first see if we've already seen SIGNATURE in a DWP file,
11818 then we check if we've already seen DWO_NAME, and only THEN do we check
11821 The result is a pointer to the dwo_unit object or NULL if we didn't find it
11822 (dwo_id mismatch or couldn't find the DWO/DWP file). */
11824 static struct dwo_unit
*
11825 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
11826 const char *dwo_name
, const char *comp_dir
,
11827 ULONGEST signature
, int is_debug_types
)
11829 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11830 const char *kind
= is_debug_types
? "TU" : "CU";
11831 void **dwo_file_slot
;
11832 struct dwo_file
*dwo_file
;
11833 struct dwp_file
*dwp_file
;
11835 /* First see if there's a DWP file.
11836 If we have a DWP file but didn't find the DWO inside it, don't
11837 look for the original DWO file. It makes gdb behave differently
11838 depending on whether one is debugging in the build tree. */
11840 dwp_file
= get_dwp_file ();
11841 if (dwp_file
!= NULL
)
11843 const struct dwp_hash_table
*dwp_htab
=
11844 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11846 if (dwp_htab
!= NULL
)
11848 struct dwo_unit
*dwo_cutu
=
11849 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
11850 signature
, is_debug_types
);
11852 if (dwo_cutu
!= NULL
)
11854 if (dwarf_read_debug
)
11856 fprintf_unfiltered (gdb_stdlog
,
11857 "Virtual DWO %s %s found: @%s\n",
11858 kind
, hex_string (signature
),
11859 host_address_to_string (dwo_cutu
));
11867 /* No DWP file, look for the DWO file. */
11869 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
11870 if (*dwo_file_slot
== NULL
)
11872 /* Read in the file and build a table of the CUs/TUs it contains. */
11873 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
11875 /* NOTE: This will be NULL if unable to open the file. */
11876 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11878 if (dwo_file
!= NULL
)
11880 struct dwo_unit
*dwo_cutu
= NULL
;
11882 if (is_debug_types
&& dwo_file
->tus
)
11884 struct dwo_unit find_dwo_cutu
;
11886 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11887 find_dwo_cutu
.signature
= signature
;
11889 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11891 else if (!is_debug_types
&& dwo_file
->cus
)
11893 struct dwo_unit find_dwo_cutu
;
11895 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11896 find_dwo_cutu
.signature
= signature
;
11897 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
11901 if (dwo_cutu
!= NULL
)
11903 if (dwarf_read_debug
)
11905 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11906 kind
, dwo_name
, hex_string (signature
),
11907 host_address_to_string (dwo_cutu
));
11914 /* We didn't find it. This could mean a dwo_id mismatch, or
11915 someone deleted the DWO/DWP file, or the search path isn't set up
11916 correctly to find the file. */
11918 if (dwarf_read_debug
)
11920 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11921 kind
, dwo_name
, hex_string (signature
));
11924 /* This is a warning and not a complaint because it can be caused by
11925 pilot error (e.g., user accidentally deleting the DWO). */
11927 /* Print the name of the DWP file if we looked there, helps the user
11928 better diagnose the problem. */
11929 std::string dwp_text
;
11931 if (dwp_file
!= NULL
)
11932 dwp_text
= string_printf (" [in DWP file %s]",
11933 lbasename (dwp_file
->name
));
11935 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11936 " [in module %s]"),
11937 kind
, dwo_name
, hex_string (signature
),
11939 this_unit
->is_debug_types
? "TU" : "CU",
11940 to_underlying (this_unit
->sect_off
), objfile_name (objfile
));
11945 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11946 See lookup_dwo_cutu_unit for details. */
11948 static struct dwo_unit
*
11949 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11950 const char *dwo_name
, const char *comp_dir
,
11951 ULONGEST signature
)
11953 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11956 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11957 See lookup_dwo_cutu_unit for details. */
11959 static struct dwo_unit
*
11960 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11961 const char *dwo_name
, const char *comp_dir
)
11963 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11966 /* Traversal function for queue_and_load_all_dwo_tus. */
11969 queue_and_load_dwo_tu (void **slot
, void *info
)
11971 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11972 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11973 ULONGEST signature
= dwo_unit
->signature
;
11974 struct signatured_type
*sig_type
=
11975 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11977 if (sig_type
!= NULL
)
11979 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11981 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11982 a real dependency of PER_CU on SIG_TYPE. That is detected later
11983 while processing PER_CU. */
11984 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11985 load_full_type_unit (sig_cu
);
11986 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11992 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11993 The DWO may have the only definition of the type, though it may not be
11994 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11995 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11998 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12000 struct dwo_unit
*dwo_unit
;
12001 struct dwo_file
*dwo_file
;
12003 gdb_assert (!per_cu
->is_debug_types
);
12004 gdb_assert (get_dwp_file () == NULL
);
12005 gdb_assert (per_cu
->cu
!= NULL
);
12007 dwo_unit
= per_cu
->cu
->dwo_unit
;
12008 gdb_assert (dwo_unit
!= NULL
);
12010 dwo_file
= dwo_unit
->dwo_file
;
12011 if (dwo_file
->tus
!= NULL
)
12012 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
12015 /* Free all resources associated with DWO_FILE.
12016 Close the DWO file and munmap the sections.
12017 All memory should be on the objfile obstack. */
12020 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
12023 /* Note: dbfd is NULL for virtual DWO files. */
12024 gdb_bfd_unref (dwo_file
->dbfd
);
12026 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
12029 /* Wrapper for free_dwo_file for use in cleanups. */
12032 free_dwo_file_cleanup (void *arg
)
12034 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
12035 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12037 free_dwo_file (dwo_file
, objfile
);
12040 /* Traversal function for free_dwo_files. */
12043 free_dwo_file_from_slot (void **slot
, void *info
)
12045 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
12046 struct objfile
*objfile
= (struct objfile
*) info
;
12048 free_dwo_file (dwo_file
, objfile
);
12053 /* Free all resources associated with DWO_FILES. */
12056 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
12058 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
12061 /* Read in various DIEs. */
12063 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12064 Inherit only the children of the DW_AT_abstract_origin DIE not being
12065 already referenced by DW_AT_abstract_origin from the children of the
12069 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12071 struct die_info
*child_die
;
12072 sect_offset
*offsetp
;
12073 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12074 struct die_info
*origin_die
;
12075 /* Iterator of the ORIGIN_DIE children. */
12076 struct die_info
*origin_child_die
;
12077 struct attribute
*attr
;
12078 struct dwarf2_cu
*origin_cu
;
12079 struct pending
**origin_previous_list_in_scope
;
12081 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12085 /* Note that following die references may follow to a die in a
12089 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12091 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12093 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12094 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12096 if (die
->tag
!= origin_die
->tag
12097 && !(die
->tag
== DW_TAG_inlined_subroutine
12098 && origin_die
->tag
== DW_TAG_subprogram
))
12099 complaint (&symfile_complaints
,
12100 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
12101 to_underlying (die
->sect_off
),
12102 to_underlying (origin_die
->sect_off
));
12104 std::vector
<sect_offset
> offsets
;
12106 for (child_die
= die
->child
;
12107 child_die
&& child_die
->tag
;
12108 child_die
= sibling_die (child_die
))
12110 struct die_info
*child_origin_die
;
12111 struct dwarf2_cu
*child_origin_cu
;
12113 /* We are trying to process concrete instance entries:
12114 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12115 it's not relevant to our analysis here. i.e. detecting DIEs that are
12116 present in the abstract instance but not referenced in the concrete
12118 if (child_die
->tag
== DW_TAG_call_site
12119 || child_die
->tag
== DW_TAG_GNU_call_site
)
12122 /* For each CHILD_DIE, find the corresponding child of
12123 ORIGIN_DIE. If there is more than one layer of
12124 DW_AT_abstract_origin, follow them all; there shouldn't be,
12125 but GCC versions at least through 4.4 generate this (GCC PR
12127 child_origin_die
= child_die
;
12128 child_origin_cu
= cu
;
12131 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12135 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12139 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12140 counterpart may exist. */
12141 if (child_origin_die
!= child_die
)
12143 if (child_die
->tag
!= child_origin_die
->tag
12144 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12145 && child_origin_die
->tag
== DW_TAG_subprogram
))
12146 complaint (&symfile_complaints
,
12147 _("Child DIE 0x%x and its abstract origin 0x%x have "
12149 to_underlying (child_die
->sect_off
),
12150 to_underlying (child_origin_die
->sect_off
));
12151 if (child_origin_die
->parent
!= origin_die
)
12152 complaint (&symfile_complaints
,
12153 _("Child DIE 0x%x and its abstract origin 0x%x have "
12154 "different parents"),
12155 to_underlying (child_die
->sect_off
),
12156 to_underlying (child_origin_die
->sect_off
));
12158 offsets
.push_back (child_origin_die
->sect_off
);
12161 std::sort (offsets
.begin (), offsets
.end ());
12162 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12163 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12164 if (offsetp
[-1] == *offsetp
)
12165 complaint (&symfile_complaints
,
12166 _("Multiple children of DIE 0x%x refer "
12167 "to DIE 0x%x as their abstract origin"),
12168 to_underlying (die
->sect_off
), to_underlying (*offsetp
));
12170 offsetp
= offsets
.data ();
12171 origin_child_die
= origin_die
->child
;
12172 while (origin_child_die
&& origin_child_die
->tag
)
12174 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12175 while (offsetp
< offsets_end
12176 && *offsetp
< origin_child_die
->sect_off
)
12178 if (offsetp
>= offsets_end
12179 || *offsetp
> origin_child_die
->sect_off
)
12181 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12182 Check whether we're already processing ORIGIN_CHILD_DIE.
12183 This can happen with mutually referenced abstract_origins.
12185 if (!origin_child_die
->in_process
)
12186 process_die (origin_child_die
, origin_cu
);
12188 origin_child_die
= sibling_die (origin_child_die
);
12190 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
12194 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12196 struct objfile
*objfile
= cu
->objfile
;
12197 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12198 struct context_stack
*newobj
;
12201 struct die_info
*child_die
;
12202 struct attribute
*attr
, *call_line
, *call_file
;
12204 CORE_ADDR baseaddr
;
12205 struct block
*block
;
12206 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
12207 VEC (symbolp
) *template_args
= NULL
;
12208 struct template_symbol
*templ_func
= NULL
;
12212 /* If we do not have call site information, we can't show the
12213 caller of this inlined function. That's too confusing, so
12214 only use the scope for local variables. */
12215 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
12216 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
12217 if (call_line
== NULL
|| call_file
== NULL
)
12219 read_lexical_block_scope (die
, cu
);
12224 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12226 name
= dwarf2_name (die
, cu
);
12228 /* Ignore functions with missing or empty names. These are actually
12229 illegal according to the DWARF standard. */
12232 complaint (&symfile_complaints
,
12233 _("missing name for subprogram DIE at %d"),
12234 to_underlying (die
->sect_off
));
12238 /* Ignore functions with missing or invalid low and high pc attributes. */
12239 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
12240 <= PC_BOUNDS_INVALID
)
12242 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
12243 if (!attr
|| !DW_UNSND (attr
))
12244 complaint (&symfile_complaints
,
12245 _("cannot get low and high bounds "
12246 "for subprogram DIE at %d"),
12247 to_underlying (die
->sect_off
));
12251 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12252 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12254 /* If we have any template arguments, then we must allocate a
12255 different sort of symbol. */
12256 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
12258 if (child_die
->tag
== DW_TAG_template_type_param
12259 || child_die
->tag
== DW_TAG_template_value_param
)
12261 templ_func
= allocate_template_symbol (objfile
);
12262 templ_func
->base
.is_cplus_template_function
= 1;
12267 newobj
= push_context (0, lowpc
);
12268 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
12269 (struct symbol
*) templ_func
);
12271 /* If there is a location expression for DW_AT_frame_base, record
12273 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
12275 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
12277 /* If there is a location for the static link, record it. */
12278 newobj
->static_link
= NULL
;
12279 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
12282 newobj
->static_link
12283 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
12284 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
12287 cu
->list_in_scope
= &local_symbols
;
12289 if (die
->child
!= NULL
)
12291 child_die
= die
->child
;
12292 while (child_die
&& child_die
->tag
)
12294 if (child_die
->tag
== DW_TAG_template_type_param
12295 || child_die
->tag
== DW_TAG_template_value_param
)
12297 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
12300 VEC_safe_push (symbolp
, template_args
, arg
);
12303 process_die (child_die
, cu
);
12304 child_die
= sibling_die (child_die
);
12308 inherit_abstract_dies (die
, cu
);
12310 /* If we have a DW_AT_specification, we might need to import using
12311 directives from the context of the specification DIE. See the
12312 comment in determine_prefix. */
12313 if (cu
->language
== language_cplus
12314 && dwarf2_attr (die
, DW_AT_specification
, cu
))
12316 struct dwarf2_cu
*spec_cu
= cu
;
12317 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
12321 child_die
= spec_die
->child
;
12322 while (child_die
&& child_die
->tag
)
12324 if (child_die
->tag
== DW_TAG_imported_module
)
12325 process_die (child_die
, spec_cu
);
12326 child_die
= sibling_die (child_die
);
12329 /* In some cases, GCC generates specification DIEs that
12330 themselves contain DW_AT_specification attributes. */
12331 spec_die
= die_specification (spec_die
, &spec_cu
);
12335 newobj
= pop_context ();
12336 /* Make a block for the local symbols within. */
12337 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
12338 newobj
->static_link
, lowpc
, highpc
);
12340 /* For C++, set the block's scope. */
12341 if ((cu
->language
== language_cplus
12342 || cu
->language
== language_fortran
12343 || cu
->language
== language_d
12344 || cu
->language
== language_rust
)
12345 && cu
->processing_has_namespace_info
)
12346 block_set_scope (block
, determine_prefix (die
, cu
),
12347 &objfile
->objfile_obstack
);
12349 /* If we have address ranges, record them. */
12350 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
12352 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
12354 /* Attach template arguments to function. */
12355 if (! VEC_empty (symbolp
, template_args
))
12357 gdb_assert (templ_func
!= NULL
);
12359 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
12360 templ_func
->template_arguments
12361 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
12362 templ_func
->n_template_arguments
);
12363 memcpy (templ_func
->template_arguments
,
12364 VEC_address (symbolp
, template_args
),
12365 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
12366 VEC_free (symbolp
, template_args
);
12369 /* In C++, we can have functions nested inside functions (e.g., when
12370 a function declares a class that has methods). This means that
12371 when we finish processing a function scope, we may need to go
12372 back to building a containing block's symbol lists. */
12373 local_symbols
= newobj
->locals
;
12374 local_using_directives
= newobj
->local_using_directives
;
12376 /* If we've finished processing a top-level function, subsequent
12377 symbols go in the file symbol list. */
12378 if (outermost_context_p ())
12379 cu
->list_in_scope
= &file_symbols
;
12382 /* Process all the DIES contained within a lexical block scope. Start
12383 a new scope, process the dies, and then close the scope. */
12386 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12388 struct objfile
*objfile
= cu
->objfile
;
12389 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12390 struct context_stack
*newobj
;
12391 CORE_ADDR lowpc
, highpc
;
12392 struct die_info
*child_die
;
12393 CORE_ADDR baseaddr
;
12395 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12397 /* Ignore blocks with missing or invalid low and high pc attributes. */
12398 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
12399 as multiple lexical blocks? Handling children in a sane way would
12400 be nasty. Might be easier to properly extend generic blocks to
12401 describe ranges. */
12402 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
12404 case PC_BOUNDS_NOT_PRESENT
:
12405 /* DW_TAG_lexical_block has no attributes, process its children as if
12406 there was no wrapping by that DW_TAG_lexical_block.
12407 GCC does no longer produces such DWARF since GCC r224161. */
12408 for (child_die
= die
->child
;
12409 child_die
!= NULL
&& child_die
->tag
;
12410 child_die
= sibling_die (child_die
))
12411 process_die (child_die
, cu
);
12413 case PC_BOUNDS_INVALID
:
12416 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12417 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
12419 push_context (0, lowpc
);
12420 if (die
->child
!= NULL
)
12422 child_die
= die
->child
;
12423 while (child_die
&& child_die
->tag
)
12425 process_die (child_die
, cu
);
12426 child_die
= sibling_die (child_die
);
12429 inherit_abstract_dies (die
, cu
);
12430 newobj
= pop_context ();
12432 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
12434 struct block
*block
12435 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
12436 newobj
->start_addr
, highpc
);
12438 /* Note that recording ranges after traversing children, as we
12439 do here, means that recording a parent's ranges entails
12440 walking across all its children's ranges as they appear in
12441 the address map, which is quadratic behavior.
12443 It would be nicer to record the parent's ranges before
12444 traversing its children, simply overriding whatever you find
12445 there. But since we don't even decide whether to create a
12446 block until after we've traversed its children, that's hard
12448 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
12450 local_symbols
= newobj
->locals
;
12451 local_using_directives
= newobj
->local_using_directives
;
12454 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
12457 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
12459 struct objfile
*objfile
= cu
->objfile
;
12460 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12461 CORE_ADDR pc
, baseaddr
;
12462 struct attribute
*attr
;
12463 struct call_site
*call_site
, call_site_local
;
12466 struct die_info
*child_die
;
12468 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12470 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
12473 /* This was a pre-DWARF-5 GNU extension alias
12474 for DW_AT_call_return_pc. */
12475 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12479 complaint (&symfile_complaints
,
12480 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
12481 "DIE 0x%x [in module %s]"),
12482 to_underlying (die
->sect_off
), objfile_name (objfile
));
12485 pc
= attr_value_as_address (attr
) + baseaddr
;
12486 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
12488 if (cu
->call_site_htab
== NULL
)
12489 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
12490 NULL
, &objfile
->objfile_obstack
,
12491 hashtab_obstack_allocate
, NULL
);
12492 call_site_local
.pc
= pc
;
12493 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
12496 complaint (&symfile_complaints
,
12497 _("Duplicate PC %s for DW_TAG_call_site "
12498 "DIE 0x%x [in module %s]"),
12499 paddress (gdbarch
, pc
), to_underlying (die
->sect_off
),
12500 objfile_name (objfile
));
12504 /* Count parameters at the caller. */
12507 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
12508 child_die
= sibling_die (child_die
))
12510 if (child_die
->tag
!= DW_TAG_call_site_parameter
12511 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12513 complaint (&symfile_complaints
,
12514 _("Tag %d is not DW_TAG_call_site_parameter in "
12515 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12516 child_die
->tag
, to_underlying (child_die
->sect_off
),
12517 objfile_name (objfile
));
12525 = ((struct call_site
*)
12526 obstack_alloc (&objfile
->objfile_obstack
,
12527 sizeof (*call_site
)
12528 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
12530 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
12531 call_site
->pc
= pc
;
12533 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
12534 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
12536 struct die_info
*func_die
;
12538 /* Skip also over DW_TAG_inlined_subroutine. */
12539 for (func_die
= die
->parent
;
12540 func_die
&& func_die
->tag
!= DW_TAG_subprogram
12541 && func_die
->tag
!= DW_TAG_subroutine_type
;
12542 func_die
= func_die
->parent
);
12544 /* DW_AT_call_all_calls is a superset
12545 of DW_AT_call_all_tail_calls. */
12547 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
12548 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
12549 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
12550 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
12552 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
12553 not complete. But keep CALL_SITE for look ups via call_site_htab,
12554 both the initial caller containing the real return address PC and
12555 the final callee containing the current PC of a chain of tail
12556 calls do not need to have the tail call list complete. But any
12557 function candidate for a virtual tail call frame searched via
12558 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
12559 determined unambiguously. */
12563 struct type
*func_type
= NULL
;
12566 func_type
= get_die_type (func_die
, cu
);
12567 if (func_type
!= NULL
)
12569 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
12571 /* Enlist this call site to the function. */
12572 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
12573 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
12576 complaint (&symfile_complaints
,
12577 _("Cannot find function owning DW_TAG_call_site "
12578 "DIE 0x%x [in module %s]"),
12579 to_underlying (die
->sect_off
), objfile_name (objfile
));
12583 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
12585 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
12587 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
12590 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
12591 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12593 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
12594 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
12595 /* Keep NULL DWARF_BLOCK. */;
12596 else if (attr_form_is_block (attr
))
12598 struct dwarf2_locexpr_baton
*dlbaton
;
12600 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
12601 dlbaton
->data
= DW_BLOCK (attr
)->data
;
12602 dlbaton
->size
= DW_BLOCK (attr
)->size
;
12603 dlbaton
->per_cu
= cu
->per_cu
;
12605 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
12607 else if (attr_form_is_ref (attr
))
12609 struct dwarf2_cu
*target_cu
= cu
;
12610 struct die_info
*target_die
;
12612 target_die
= follow_die_ref (die
, attr
, &target_cu
);
12613 gdb_assert (target_cu
->objfile
== objfile
);
12614 if (die_is_declaration (target_die
, target_cu
))
12616 const char *target_physname
;
12618 /* Prefer the mangled name; otherwise compute the demangled one. */
12619 target_physname
= dw2_linkage_name (target_die
, target_cu
);
12620 if (target_physname
== NULL
)
12621 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
12622 if (target_physname
== NULL
)
12623 complaint (&symfile_complaints
,
12624 _("DW_AT_call_target target DIE has invalid "
12625 "physname, for referencing DIE 0x%x [in module %s]"),
12626 to_underlying (die
->sect_off
), objfile_name (objfile
));
12628 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
12634 /* DW_AT_entry_pc should be preferred. */
12635 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
12636 <= PC_BOUNDS_INVALID
)
12637 complaint (&symfile_complaints
,
12638 _("DW_AT_call_target target DIE has invalid "
12639 "low pc, for referencing DIE 0x%x [in module %s]"),
12640 to_underlying (die
->sect_off
), objfile_name (objfile
));
12643 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12644 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
12649 complaint (&symfile_complaints
,
12650 _("DW_TAG_call_site DW_AT_call_target is neither "
12651 "block nor reference, for DIE 0x%x [in module %s]"),
12652 to_underlying (die
->sect_off
), objfile_name (objfile
));
12654 call_site
->per_cu
= cu
->per_cu
;
12656 for (child_die
= die
->child
;
12657 child_die
&& child_die
->tag
;
12658 child_die
= sibling_die (child_die
))
12660 struct call_site_parameter
*parameter
;
12661 struct attribute
*loc
, *origin
;
12663 if (child_die
->tag
!= DW_TAG_call_site_parameter
12664 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12666 /* Already printed the complaint above. */
12670 gdb_assert (call_site
->parameter_count
< nparams
);
12671 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
12673 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
12674 specifies DW_TAG_formal_parameter. Value of the data assumed for the
12675 register is contained in DW_AT_call_value. */
12677 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
12678 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
12679 if (origin
== NULL
)
12681 /* This was a pre-DWARF-5 GNU extension alias
12682 for DW_AT_call_parameter. */
12683 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
12685 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
12687 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
12689 sect_offset sect_off
12690 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
12691 if (!offset_in_cu_p (&cu
->header
, sect_off
))
12693 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
12694 binding can be done only inside one CU. Such referenced DIE
12695 therefore cannot be even moved to DW_TAG_partial_unit. */
12696 complaint (&symfile_complaints
,
12697 _("DW_AT_call_parameter offset is not in CU for "
12698 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12699 to_underlying (child_die
->sect_off
),
12700 objfile_name (objfile
));
12703 parameter
->u
.param_cu_off
12704 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
12706 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
12708 complaint (&symfile_complaints
,
12709 _("No DW_FORM_block* DW_AT_location for "
12710 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12711 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
12716 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
12717 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
12718 if (parameter
->u
.dwarf_reg
!= -1)
12719 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
12720 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
12721 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
12722 ¶meter
->u
.fb_offset
))
12723 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
12726 complaint (&symfile_complaints
,
12727 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
12728 "for DW_FORM_block* DW_AT_location is supported for "
12729 "DW_TAG_call_site child DIE 0x%x "
12731 to_underlying (child_die
->sect_off
),
12732 objfile_name (objfile
));
12737 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
12739 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
12740 if (!attr_form_is_block (attr
))
12742 complaint (&symfile_complaints
,
12743 _("No DW_FORM_block* DW_AT_call_value for "
12744 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12745 to_underlying (child_die
->sect_off
),
12746 objfile_name (objfile
));
12749 parameter
->value
= DW_BLOCK (attr
)->data
;
12750 parameter
->value_size
= DW_BLOCK (attr
)->size
;
12752 /* Parameters are not pre-cleared by memset above. */
12753 parameter
->data_value
= NULL
;
12754 parameter
->data_value_size
= 0;
12755 call_site
->parameter_count
++;
12757 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
12759 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
12762 if (!attr_form_is_block (attr
))
12763 complaint (&symfile_complaints
,
12764 _("No DW_FORM_block* DW_AT_call_data_value for "
12765 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12766 to_underlying (child_die
->sect_off
),
12767 objfile_name (objfile
));
12770 parameter
->data_value
= DW_BLOCK (attr
)->data
;
12771 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
12777 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
12778 reading .debug_rnglists.
12779 Callback's type should be:
12780 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12781 Return true if the attributes are present and valid, otherwise,
12784 template <typename Callback
>
12786 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
12787 Callback
&&callback
)
12789 struct objfile
*objfile
= cu
->objfile
;
12790 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12791 struct comp_unit_head
*cu_header
= &cu
->header
;
12792 bfd
*obfd
= objfile
->obfd
;
12793 unsigned int addr_size
= cu_header
->addr_size
;
12794 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12795 /* Base address selection entry. */
12798 unsigned int dummy
;
12799 const gdb_byte
*buffer
;
12801 CORE_ADDR high
= 0;
12802 CORE_ADDR baseaddr
;
12803 bool overflow
= false;
12805 found_base
= cu
->base_known
;
12806 base
= cu
->base_address
;
12808 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
12809 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
12811 complaint (&symfile_complaints
,
12812 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12816 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
12818 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12822 /* Initialize it due to a false compiler warning. */
12823 CORE_ADDR range_beginning
= 0, range_end
= 0;
12824 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
12825 + dwarf2_per_objfile
->rnglists
.size
);
12826 unsigned int bytes_read
;
12828 if (buffer
== buf_end
)
12833 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
12836 case DW_RLE_end_of_list
:
12838 case DW_RLE_base_address
:
12839 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12844 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12846 buffer
+= bytes_read
;
12848 case DW_RLE_start_length
:
12849 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12854 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12855 buffer
+= bytes_read
;
12856 range_end
= (range_beginning
12857 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
12858 buffer
+= bytes_read
;
12859 if (buffer
> buf_end
)
12865 case DW_RLE_offset_pair
:
12866 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12867 buffer
+= bytes_read
;
12868 if (buffer
> buf_end
)
12873 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12874 buffer
+= bytes_read
;
12875 if (buffer
> buf_end
)
12881 case DW_RLE_start_end
:
12882 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
12887 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12888 buffer
+= bytes_read
;
12889 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12890 buffer
+= bytes_read
;
12893 complaint (&symfile_complaints
,
12894 _("Invalid .debug_rnglists data (no base address)"));
12897 if (rlet
== DW_RLE_end_of_list
|| overflow
)
12899 if (rlet
== DW_RLE_base_address
)
12904 /* We have no valid base address for the ranges
12906 complaint (&symfile_complaints
,
12907 _("Invalid .debug_rnglists data (no base address)"));
12911 if (range_beginning
> range_end
)
12913 /* Inverted range entries are invalid. */
12914 complaint (&symfile_complaints
,
12915 _("Invalid .debug_rnglists data (inverted range)"));
12919 /* Empty range entries have no effect. */
12920 if (range_beginning
== range_end
)
12923 range_beginning
+= base
;
12926 /* A not-uncommon case of bad debug info.
12927 Don't pollute the addrmap with bad data. */
12928 if (range_beginning
+ baseaddr
== 0
12929 && !dwarf2_per_objfile
->has_section_at_zero
)
12931 complaint (&symfile_complaints
,
12932 _(".debug_rnglists entry has start address of zero"
12933 " [in module %s]"), objfile_name (objfile
));
12937 callback (range_beginning
, range_end
);
12942 complaint (&symfile_complaints
,
12943 _("Offset %d is not terminated "
12944 "for DW_AT_ranges attribute"),
12952 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
12953 Callback's type should be:
12954 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12955 Return 1 if the attributes are present and valid, otherwise, return 0. */
12957 template <typename Callback
>
12959 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
12960 Callback
&&callback
)
12962 struct objfile
*objfile
= cu
->objfile
;
12963 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12964 struct comp_unit_head
*cu_header
= &cu
->header
;
12965 bfd
*obfd
= objfile
->obfd
;
12966 unsigned int addr_size
= cu_header
->addr_size
;
12967 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12968 /* Base address selection entry. */
12971 unsigned int dummy
;
12972 const gdb_byte
*buffer
;
12973 CORE_ADDR baseaddr
;
12975 if (cu_header
->version
>= 5)
12976 return dwarf2_rnglists_process (offset
, cu
, callback
);
12978 found_base
= cu
->base_known
;
12979 base
= cu
->base_address
;
12981 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12982 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12984 complaint (&symfile_complaints
,
12985 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12989 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12991 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12995 CORE_ADDR range_beginning
, range_end
;
12997 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
12998 buffer
+= addr_size
;
12999 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
13000 buffer
+= addr_size
;
13001 offset
+= 2 * addr_size
;
13003 /* An end of list marker is a pair of zero addresses. */
13004 if (range_beginning
== 0 && range_end
== 0)
13005 /* Found the end of list entry. */
13008 /* Each base address selection entry is a pair of 2 values.
13009 The first is the largest possible address, the second is
13010 the base address. Check for a base address here. */
13011 if ((range_beginning
& mask
) == mask
)
13013 /* If we found the largest possible address, then we already
13014 have the base address in range_end. */
13022 /* We have no valid base address for the ranges
13024 complaint (&symfile_complaints
,
13025 _("Invalid .debug_ranges data (no base address)"));
13029 if (range_beginning
> range_end
)
13031 /* Inverted range entries are invalid. */
13032 complaint (&symfile_complaints
,
13033 _("Invalid .debug_ranges data (inverted range)"));
13037 /* Empty range entries have no effect. */
13038 if (range_beginning
== range_end
)
13041 range_beginning
+= base
;
13044 /* A not-uncommon case of bad debug info.
13045 Don't pollute the addrmap with bad data. */
13046 if (range_beginning
+ baseaddr
== 0
13047 && !dwarf2_per_objfile
->has_section_at_zero
)
13049 complaint (&symfile_complaints
,
13050 _(".debug_ranges entry has start address of zero"
13051 " [in module %s]"), objfile_name (objfile
));
13055 callback (range_beginning
, range_end
);
13061 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13062 Return 1 if the attributes are present and valid, otherwise, return 0.
13063 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13066 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13067 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13068 struct partial_symtab
*ranges_pst
)
13070 struct objfile
*objfile
= cu
->objfile
;
13071 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13072 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
13073 SECT_OFF_TEXT (objfile
));
13076 CORE_ADDR high
= 0;
13079 retval
= dwarf2_ranges_process (offset
, cu
,
13080 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13082 if (ranges_pst
!= NULL
)
13087 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
13088 range_beginning
+ baseaddr
);
13089 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
13090 range_end
+ baseaddr
);
13091 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
13095 /* FIXME: This is recording everything as a low-high
13096 segment of consecutive addresses. We should have a
13097 data structure for discontiguous block ranges
13101 low
= range_beginning
;
13107 if (range_beginning
< low
)
13108 low
= range_beginning
;
13109 if (range_end
> high
)
13117 /* If the first entry is an end-of-list marker, the range
13118 describes an empty scope, i.e. no instructions. */
13124 *high_return
= high
;
13128 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13129 definition for the return value. *LOWPC and *HIGHPC are set iff
13130 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
13132 static enum pc_bounds_kind
13133 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
13134 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
13135 struct partial_symtab
*pst
)
13137 struct attribute
*attr
;
13138 struct attribute
*attr_high
;
13140 CORE_ADDR high
= 0;
13141 enum pc_bounds_kind ret
;
13143 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13146 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13149 low
= attr_value_as_address (attr
);
13150 high
= attr_value_as_address (attr_high
);
13151 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
13155 /* Found high w/o low attribute. */
13156 return PC_BOUNDS_INVALID
;
13158 /* Found consecutive range of addresses. */
13159 ret
= PC_BOUNDS_HIGH_LOW
;
13163 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13166 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
13167 We take advantage of the fact that DW_AT_ranges does not appear
13168 in DW_TAG_compile_unit of DWO files. */
13169 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13170 unsigned int ranges_offset
= (DW_UNSND (attr
)
13171 + (need_ranges_base
13175 /* Value of the DW_AT_ranges attribute is the offset in the
13176 .debug_ranges section. */
13177 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
13178 return PC_BOUNDS_INVALID
;
13179 /* Found discontinuous range of addresses. */
13180 ret
= PC_BOUNDS_RANGES
;
13183 return PC_BOUNDS_NOT_PRESENT
;
13186 /* read_partial_die has also the strict LOW < HIGH requirement. */
13188 return PC_BOUNDS_INVALID
;
13190 /* When using the GNU linker, .gnu.linkonce. sections are used to
13191 eliminate duplicate copies of functions and vtables and such.
13192 The linker will arbitrarily choose one and discard the others.
13193 The AT_*_pc values for such functions refer to local labels in
13194 these sections. If the section from that file was discarded, the
13195 labels are not in the output, so the relocs get a value of 0.
13196 If this is a discarded function, mark the pc bounds as invalid,
13197 so that GDB will ignore it. */
13198 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
13199 return PC_BOUNDS_INVALID
;
13207 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
13208 its low and high PC addresses. Do nothing if these addresses could not
13209 be determined. Otherwise, set LOWPC to the low address if it is smaller,
13210 and HIGHPC to the high address if greater than HIGHPC. */
13213 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
13214 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13215 struct dwarf2_cu
*cu
)
13217 CORE_ADDR low
, high
;
13218 struct die_info
*child
= die
->child
;
13220 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
13222 *lowpc
= std::min (*lowpc
, low
);
13223 *highpc
= std::max (*highpc
, high
);
13226 /* If the language does not allow nested subprograms (either inside
13227 subprograms or lexical blocks), we're done. */
13228 if (cu
->language
!= language_ada
)
13231 /* Check all the children of the given DIE. If it contains nested
13232 subprograms, then check their pc bounds. Likewise, we need to
13233 check lexical blocks as well, as they may also contain subprogram
13235 while (child
&& child
->tag
)
13237 if (child
->tag
== DW_TAG_subprogram
13238 || child
->tag
== DW_TAG_lexical_block
)
13239 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
13240 child
= sibling_die (child
);
13244 /* Get the low and high pc's represented by the scope DIE, and store
13245 them in *LOWPC and *HIGHPC. If the correct values can't be
13246 determined, set *LOWPC to -1 and *HIGHPC to 0. */
13249 get_scope_pc_bounds (struct die_info
*die
,
13250 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
13251 struct dwarf2_cu
*cu
)
13253 CORE_ADDR best_low
= (CORE_ADDR
) -1;
13254 CORE_ADDR best_high
= (CORE_ADDR
) 0;
13255 CORE_ADDR current_low
, current_high
;
13257 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
13258 >= PC_BOUNDS_RANGES
)
13260 best_low
= current_low
;
13261 best_high
= current_high
;
13265 struct die_info
*child
= die
->child
;
13267 while (child
&& child
->tag
)
13269 switch (child
->tag
) {
13270 case DW_TAG_subprogram
:
13271 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
13273 case DW_TAG_namespace
:
13274 case DW_TAG_module
:
13275 /* FIXME: carlton/2004-01-16: Should we do this for
13276 DW_TAG_class_type/DW_TAG_structure_type, too? I think
13277 that current GCC's always emit the DIEs corresponding
13278 to definitions of methods of classes as children of a
13279 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
13280 the DIEs giving the declarations, which could be
13281 anywhere). But I don't see any reason why the
13282 standards says that they have to be there. */
13283 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
13285 if (current_low
!= ((CORE_ADDR
) -1))
13287 best_low
= std::min (best_low
, current_low
);
13288 best_high
= std::max (best_high
, current_high
);
13296 child
= sibling_die (child
);
13301 *highpc
= best_high
;
13304 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
13308 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
13309 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
13311 struct objfile
*objfile
= cu
->objfile
;
13312 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13313 struct attribute
*attr
;
13314 struct attribute
*attr_high
;
13316 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
13319 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13322 CORE_ADDR low
= attr_value_as_address (attr
);
13323 CORE_ADDR high
= attr_value_as_address (attr_high
);
13325 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
13328 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
13329 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
13330 record_block_range (block
, low
, high
- 1);
13334 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
13337 bfd
*obfd
= objfile
->obfd
;
13338 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
13339 We take advantage of the fact that DW_AT_ranges does not appear
13340 in DW_TAG_compile_unit of DWO files. */
13341 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
13343 /* The value of the DW_AT_ranges attribute is the offset of the
13344 address range list in the .debug_ranges section. */
13345 unsigned long offset
= (DW_UNSND (attr
)
13346 + (need_ranges_base
? cu
->ranges_base
: 0));
13347 const gdb_byte
*buffer
;
13349 /* For some target architectures, but not others, the
13350 read_address function sign-extends the addresses it returns.
13351 To recognize base address selection entries, we need a
13353 unsigned int addr_size
= cu
->header
.addr_size
;
13354 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13356 /* The base address, to which the next pair is relative. Note
13357 that this 'base' is a DWARF concept: most entries in a range
13358 list are relative, to reduce the number of relocs against the
13359 debugging information. This is separate from this function's
13360 'baseaddr' argument, which GDB uses to relocate debugging
13361 information from a shared library based on the address at
13362 which the library was loaded. */
13363 CORE_ADDR base
= cu
->base_address
;
13364 int base_known
= cu
->base_known
;
13366 dwarf2_ranges_process (offset
, cu
,
13367 [&] (CORE_ADDR start
, CORE_ADDR end
)
13371 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
13372 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
13373 record_block_range (block
, start
, end
- 1);
13378 /* Check whether the producer field indicates either of GCC < 4.6, or the
13379 Intel C/C++ compiler, and cache the result in CU. */
13382 check_producer (struct dwarf2_cu
*cu
)
13386 if (cu
->producer
== NULL
)
13388 /* For unknown compilers expect their behavior is DWARF version
13391 GCC started to support .debug_types sections by -gdwarf-4 since
13392 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
13393 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
13394 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
13395 interpreted incorrectly by GDB now - GCC PR debug/48229. */
13397 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
13399 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
13400 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
13402 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
13403 cu
->producer_is_icc_lt_14
= major
< 14;
13406 /* For other non-GCC compilers, expect their behavior is DWARF version
13410 cu
->checked_producer
= 1;
13413 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
13414 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
13415 during 4.6.0 experimental. */
13418 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
13420 if (!cu
->checked_producer
)
13421 check_producer (cu
);
13423 return cu
->producer_is_gxx_lt_4_6
;
13426 /* Return the default accessibility type if it is not overriden by
13427 DW_AT_accessibility. */
13429 static enum dwarf_access_attribute
13430 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
13432 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
13434 /* The default DWARF 2 accessibility for members is public, the default
13435 accessibility for inheritance is private. */
13437 if (die
->tag
!= DW_TAG_inheritance
)
13438 return DW_ACCESS_public
;
13440 return DW_ACCESS_private
;
13444 /* DWARF 3+ defines the default accessibility a different way. The same
13445 rules apply now for DW_TAG_inheritance as for the members and it only
13446 depends on the container kind. */
13448 if (die
->parent
->tag
== DW_TAG_class_type
)
13449 return DW_ACCESS_private
;
13451 return DW_ACCESS_public
;
13455 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
13456 offset. If the attribute was not found return 0, otherwise return
13457 1. If it was found but could not properly be handled, set *OFFSET
13461 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
13464 struct attribute
*attr
;
13466 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
13471 /* Note that we do not check for a section offset first here.
13472 This is because DW_AT_data_member_location is new in DWARF 4,
13473 so if we see it, we can assume that a constant form is really
13474 a constant and not a section offset. */
13475 if (attr_form_is_constant (attr
))
13476 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
13477 else if (attr_form_is_section_offset (attr
))
13478 dwarf2_complex_location_expr_complaint ();
13479 else if (attr_form_is_block (attr
))
13480 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
13482 dwarf2_complex_location_expr_complaint ();
13490 /* Add an aggregate field to the field list. */
13493 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
13494 struct dwarf2_cu
*cu
)
13496 struct objfile
*objfile
= cu
->objfile
;
13497 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13498 struct nextfield
*new_field
;
13499 struct attribute
*attr
;
13501 const char *fieldname
= "";
13503 /* Allocate a new field list entry and link it in. */
13504 new_field
= XNEW (struct nextfield
);
13505 make_cleanup (xfree
, new_field
);
13506 memset (new_field
, 0, sizeof (struct nextfield
));
13508 if (die
->tag
== DW_TAG_inheritance
)
13510 new_field
->next
= fip
->baseclasses
;
13511 fip
->baseclasses
= new_field
;
13515 new_field
->next
= fip
->fields
;
13516 fip
->fields
= new_field
;
13520 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13522 new_field
->accessibility
= DW_UNSND (attr
);
13524 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
13525 if (new_field
->accessibility
!= DW_ACCESS_public
)
13526 fip
->non_public_fields
= 1;
13528 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13530 new_field
->virtuality
= DW_UNSND (attr
);
13532 new_field
->virtuality
= DW_VIRTUALITY_none
;
13534 fp
= &new_field
->field
;
13536 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
13540 /* Data member other than a C++ static data member. */
13542 /* Get type of field. */
13543 fp
->type
= die_type (die
, cu
);
13545 SET_FIELD_BITPOS (*fp
, 0);
13547 /* Get bit size of field (zero if none). */
13548 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
13551 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
13555 FIELD_BITSIZE (*fp
) = 0;
13558 /* Get bit offset of field. */
13559 if (handle_data_member_location (die
, cu
, &offset
))
13560 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13561 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
13564 if (gdbarch_bits_big_endian (gdbarch
))
13566 /* For big endian bits, the DW_AT_bit_offset gives the
13567 additional bit offset from the MSB of the containing
13568 anonymous object to the MSB of the field. We don't
13569 have to do anything special since we don't need to
13570 know the size of the anonymous object. */
13571 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
13575 /* For little endian bits, compute the bit offset to the
13576 MSB of the anonymous object, subtract off the number of
13577 bits from the MSB of the field to the MSB of the
13578 object, and then subtract off the number of bits of
13579 the field itself. The result is the bit offset of
13580 the LSB of the field. */
13581 int anonymous_size
;
13582 int bit_offset
= DW_UNSND (attr
);
13584 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13587 /* The size of the anonymous object containing
13588 the bit field is explicit, so use the
13589 indicated size (in bytes). */
13590 anonymous_size
= DW_UNSND (attr
);
13594 /* The size of the anonymous object containing
13595 the bit field must be inferred from the type
13596 attribute of the data member containing the
13598 anonymous_size
= TYPE_LENGTH (fp
->type
);
13600 SET_FIELD_BITPOS (*fp
,
13601 (FIELD_BITPOS (*fp
)
13602 + anonymous_size
* bits_per_byte
13603 - bit_offset
- FIELD_BITSIZE (*fp
)));
13606 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
13608 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
13609 + dwarf2_get_attr_constant_value (attr
, 0)));
13611 /* Get name of field. */
13612 fieldname
= dwarf2_name (die
, cu
);
13613 if (fieldname
== NULL
)
13616 /* The name is already allocated along with this objfile, so we don't
13617 need to duplicate it for the type. */
13618 fp
->name
= fieldname
;
13620 /* Change accessibility for artificial fields (e.g. virtual table
13621 pointer or virtual base class pointer) to private. */
13622 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
13624 FIELD_ARTIFICIAL (*fp
) = 1;
13625 new_field
->accessibility
= DW_ACCESS_private
;
13626 fip
->non_public_fields
= 1;
13629 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
13631 /* C++ static member. */
13633 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
13634 is a declaration, but all versions of G++ as of this writing
13635 (so through at least 3.2.1) incorrectly generate
13636 DW_TAG_variable tags. */
13638 const char *physname
;
13640 /* Get name of field. */
13641 fieldname
= dwarf2_name (die
, cu
);
13642 if (fieldname
== NULL
)
13645 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13647 /* Only create a symbol if this is an external value.
13648 new_symbol checks this and puts the value in the global symbol
13649 table, which we want. If it is not external, new_symbol
13650 will try to put the value in cu->list_in_scope which is wrong. */
13651 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
13653 /* A static const member, not much different than an enum as far as
13654 we're concerned, except that we can support more types. */
13655 new_symbol (die
, NULL
, cu
);
13658 /* Get physical name. */
13659 physname
= dwarf2_physname (fieldname
, die
, cu
);
13661 /* The name is already allocated along with this objfile, so we don't
13662 need to duplicate it for the type. */
13663 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
13664 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13665 FIELD_NAME (*fp
) = fieldname
;
13667 else if (die
->tag
== DW_TAG_inheritance
)
13671 /* C++ base class field. */
13672 if (handle_data_member_location (die
, cu
, &offset
))
13673 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13674 FIELD_BITSIZE (*fp
) = 0;
13675 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13676 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
13677 fip
->nbaseclasses
++;
13681 /* Add a typedef defined in the scope of the FIP's class. */
13684 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
13685 struct dwarf2_cu
*cu
)
13687 struct typedef_field_list
*new_field
;
13688 struct typedef_field
*fp
;
13690 /* Allocate a new field list entry and link it in. */
13691 new_field
= XCNEW (struct typedef_field_list
);
13692 make_cleanup (xfree
, new_field
);
13694 gdb_assert (die
->tag
== DW_TAG_typedef
);
13696 fp
= &new_field
->field
;
13698 /* Get name of field. */
13699 fp
->name
= dwarf2_name (die
, cu
);
13700 if (fp
->name
== NULL
)
13703 fp
->type
= read_type_die (die
, cu
);
13705 /* Save accessibility. */
13706 enum dwarf_access_attribute accessibility
;
13707 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13709 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13711 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13712 switch (accessibility
)
13714 case DW_ACCESS_public
:
13715 /* The assumed value if neither private nor protected. */
13717 case DW_ACCESS_private
:
13718 fp
->is_private
= 1;
13720 case DW_ACCESS_protected
:
13721 fp
->is_protected
= 1;
13724 complaint (&symfile_complaints
,
13725 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
13728 new_field
->next
= fip
->typedef_field_list
;
13729 fip
->typedef_field_list
= new_field
;
13730 fip
->typedef_field_list_count
++;
13733 /* Create the vector of fields, and attach it to the type. */
13736 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
13737 struct dwarf2_cu
*cu
)
13739 int nfields
= fip
->nfields
;
13741 /* Record the field count, allocate space for the array of fields,
13742 and create blank accessibility bitfields if necessary. */
13743 TYPE_NFIELDS (type
) = nfields
;
13744 TYPE_FIELDS (type
) = (struct field
*)
13745 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
13746 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
13748 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
13750 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13752 TYPE_FIELD_PRIVATE_BITS (type
) =
13753 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13754 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
13756 TYPE_FIELD_PROTECTED_BITS (type
) =
13757 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13758 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
13760 TYPE_FIELD_IGNORE_BITS (type
) =
13761 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13762 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
13765 /* If the type has baseclasses, allocate and clear a bit vector for
13766 TYPE_FIELD_VIRTUAL_BITS. */
13767 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
13769 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
13770 unsigned char *pointer
;
13772 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13773 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
13774 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
13775 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
13776 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
13779 /* Copy the saved-up fields into the field vector. Start from the head of
13780 the list, adding to the tail of the field array, so that they end up in
13781 the same order in the array in which they were added to the list. */
13782 while (nfields
-- > 0)
13784 struct nextfield
*fieldp
;
13788 fieldp
= fip
->fields
;
13789 fip
->fields
= fieldp
->next
;
13793 fieldp
= fip
->baseclasses
;
13794 fip
->baseclasses
= fieldp
->next
;
13797 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
13798 switch (fieldp
->accessibility
)
13800 case DW_ACCESS_private
:
13801 if (cu
->language
!= language_ada
)
13802 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
13805 case DW_ACCESS_protected
:
13806 if (cu
->language
!= language_ada
)
13807 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
13810 case DW_ACCESS_public
:
13814 /* Unknown accessibility. Complain and treat it as public. */
13816 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
13817 fieldp
->accessibility
);
13821 if (nfields
< fip
->nbaseclasses
)
13823 switch (fieldp
->virtuality
)
13825 case DW_VIRTUALITY_virtual
:
13826 case DW_VIRTUALITY_pure_virtual
:
13827 if (cu
->language
== language_ada
)
13828 error (_("unexpected virtuality in component of Ada type"));
13829 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
13836 /* Return true if this member function is a constructor, false
13840 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
13842 const char *fieldname
;
13843 const char *type_name
;
13846 if (die
->parent
== NULL
)
13849 if (die
->parent
->tag
!= DW_TAG_structure_type
13850 && die
->parent
->tag
!= DW_TAG_union_type
13851 && die
->parent
->tag
!= DW_TAG_class_type
)
13854 fieldname
= dwarf2_name (die
, cu
);
13855 type_name
= dwarf2_name (die
->parent
, cu
);
13856 if (fieldname
== NULL
|| type_name
== NULL
)
13859 len
= strlen (fieldname
);
13860 return (strncmp (fieldname
, type_name
, len
) == 0
13861 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
13864 /* Add a member function to the proper fieldlist. */
13867 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
13868 struct type
*type
, struct dwarf2_cu
*cu
)
13870 struct objfile
*objfile
= cu
->objfile
;
13871 struct attribute
*attr
;
13872 struct fnfieldlist
*flp
;
13874 struct fn_field
*fnp
;
13875 const char *fieldname
;
13876 struct nextfnfield
*new_fnfield
;
13877 struct type
*this_type
;
13878 enum dwarf_access_attribute accessibility
;
13880 if (cu
->language
== language_ada
)
13881 error (_("unexpected member function in Ada type"));
13883 /* Get name of member function. */
13884 fieldname
= dwarf2_name (die
, cu
);
13885 if (fieldname
== NULL
)
13888 /* Look up member function name in fieldlist. */
13889 for (i
= 0; i
< fip
->nfnfields
; i
++)
13891 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
13895 /* Create new list element if necessary. */
13896 if (i
< fip
->nfnfields
)
13897 flp
= &fip
->fnfieldlists
[i
];
13900 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13902 fip
->fnfieldlists
= (struct fnfieldlist
*)
13903 xrealloc (fip
->fnfieldlists
,
13904 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
13905 * sizeof (struct fnfieldlist
));
13906 if (fip
->nfnfields
== 0)
13907 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
13909 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
13910 flp
->name
= fieldname
;
13913 i
= fip
->nfnfields
++;
13916 /* Create a new member function field and chain it to the field list
13918 new_fnfield
= XNEW (struct nextfnfield
);
13919 make_cleanup (xfree
, new_fnfield
);
13920 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
13921 new_fnfield
->next
= flp
->head
;
13922 flp
->head
= new_fnfield
;
13925 /* Fill in the member function field info. */
13926 fnp
= &new_fnfield
->fnfield
;
13928 /* Delay processing of the physname until later. */
13929 if (cu
->language
== language_cplus
)
13931 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
13936 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
13937 fnp
->physname
= physname
? physname
: "";
13940 fnp
->type
= alloc_type (objfile
);
13941 this_type
= read_type_die (die
, cu
);
13942 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
13944 int nparams
= TYPE_NFIELDS (this_type
);
13946 /* TYPE is the domain of this method, and THIS_TYPE is the type
13947 of the method itself (TYPE_CODE_METHOD). */
13948 smash_to_method_type (fnp
->type
, type
,
13949 TYPE_TARGET_TYPE (this_type
),
13950 TYPE_FIELDS (this_type
),
13951 TYPE_NFIELDS (this_type
),
13952 TYPE_VARARGS (this_type
));
13954 /* Handle static member functions.
13955 Dwarf2 has no clean way to discern C++ static and non-static
13956 member functions. G++ helps GDB by marking the first
13957 parameter for non-static member functions (which is the this
13958 pointer) as artificial. We obtain this information from
13959 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
13960 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
13961 fnp
->voffset
= VOFFSET_STATIC
;
13964 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
13965 dwarf2_full_name (fieldname
, die
, cu
));
13967 /* Get fcontext from DW_AT_containing_type if present. */
13968 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13969 fnp
->fcontext
= die_containing_type (die
, cu
);
13971 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
13972 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
13974 /* Get accessibility. */
13975 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13977 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13979 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13980 switch (accessibility
)
13982 case DW_ACCESS_private
:
13983 fnp
->is_private
= 1;
13985 case DW_ACCESS_protected
:
13986 fnp
->is_protected
= 1;
13990 /* Check for artificial methods. */
13991 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
13992 if (attr
&& DW_UNSND (attr
) != 0)
13993 fnp
->is_artificial
= 1;
13995 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
13997 /* Get index in virtual function table if it is a virtual member
13998 function. For older versions of GCC, this is an offset in the
13999 appropriate virtual table, as specified by DW_AT_containing_type.
14000 For everyone else, it is an expression to be evaluated relative
14001 to the object address. */
14003 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
14006 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
14008 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
14010 /* Old-style GCC. */
14011 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
14013 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
14014 || (DW_BLOCK (attr
)->size
> 1
14015 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
14016 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
14018 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14019 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
14020 dwarf2_complex_location_expr_complaint ();
14022 fnp
->voffset
/= cu
->header
.addr_size
;
14026 dwarf2_complex_location_expr_complaint ();
14028 if (!fnp
->fcontext
)
14030 /* If there is no `this' field and no DW_AT_containing_type,
14031 we cannot actually find a base class context for the
14033 if (TYPE_NFIELDS (this_type
) == 0
14034 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
14036 complaint (&symfile_complaints
,
14037 _("cannot determine context for virtual member "
14038 "function \"%s\" (offset %d)"),
14039 fieldname
, to_underlying (die
->sect_off
));
14044 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
14048 else if (attr_form_is_section_offset (attr
))
14050 dwarf2_complex_location_expr_complaint ();
14054 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
14060 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14061 if (attr
&& DW_UNSND (attr
))
14063 /* GCC does this, as of 2008-08-25; PR debug/37237. */
14064 complaint (&symfile_complaints
,
14065 _("Member function \"%s\" (offset %d) is virtual "
14066 "but the vtable offset is not specified"),
14067 fieldname
, to_underlying (die
->sect_off
));
14068 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14069 TYPE_CPLUS_DYNAMIC (type
) = 1;
14074 /* Create the vector of member function fields, and attach it to the type. */
14077 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
14078 struct dwarf2_cu
*cu
)
14080 struct fnfieldlist
*flp
;
14083 if (cu
->language
== language_ada
)
14084 error (_("unexpected member functions in Ada type"));
14086 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14087 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
14088 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
14090 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
14092 struct nextfnfield
*nfp
= flp
->head
;
14093 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
14096 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
14097 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
14098 fn_flp
->fn_fields
= (struct fn_field
*)
14099 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
14100 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
14101 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
14104 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
14107 /* Returns non-zero if NAME is the name of a vtable member in CU's
14108 language, zero otherwise. */
14110 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
14112 static const char vptr
[] = "_vptr";
14113 static const char vtable
[] = "vtable";
14115 /* Look for the C++ form of the vtable. */
14116 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
14122 /* GCC outputs unnamed structures that are really pointers to member
14123 functions, with the ABI-specified layout. If TYPE describes
14124 such a structure, smash it into a member function type.
14126 GCC shouldn't do this; it should just output pointer to member DIEs.
14127 This is GCC PR debug/28767. */
14130 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
14132 struct type
*pfn_type
, *self_type
, *new_type
;
14134 /* Check for a structure with no name and two children. */
14135 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
14138 /* Check for __pfn and __delta members. */
14139 if (TYPE_FIELD_NAME (type
, 0) == NULL
14140 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
14141 || TYPE_FIELD_NAME (type
, 1) == NULL
14142 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
14145 /* Find the type of the method. */
14146 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
14147 if (pfn_type
== NULL
14148 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
14149 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
14152 /* Look for the "this" argument. */
14153 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
14154 if (TYPE_NFIELDS (pfn_type
) == 0
14155 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
14156 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
14159 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
14160 new_type
= alloc_type (objfile
);
14161 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
14162 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
14163 TYPE_VARARGS (pfn_type
));
14164 smash_to_methodptr_type (type
, new_type
);
14168 /* Called when we find the DIE that starts a structure or union scope
14169 (definition) to create a type for the structure or union. Fill in
14170 the type's name and general properties; the members will not be
14171 processed until process_structure_scope. A symbol table entry for
14172 the type will also not be done until process_structure_scope (assuming
14173 the type has a name).
14175 NOTE: we need to call these functions regardless of whether or not the
14176 DIE has a DW_AT_name attribute, since it might be an anonymous
14177 structure or union. This gets the type entered into our set of
14178 user defined types. */
14180 static struct type
*
14181 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14183 struct objfile
*objfile
= cu
->objfile
;
14185 struct attribute
*attr
;
14188 /* If the definition of this type lives in .debug_types, read that type.
14189 Don't follow DW_AT_specification though, that will take us back up
14190 the chain and we want to go down. */
14191 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14194 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14196 /* The type's CU may not be the same as CU.
14197 Ensure TYPE is recorded with CU in die_type_hash. */
14198 return set_die_type (die
, type
, cu
);
14201 type
= alloc_type (objfile
);
14202 INIT_CPLUS_SPECIFIC (type
);
14204 name
= dwarf2_name (die
, cu
);
14207 if (cu
->language
== language_cplus
14208 || cu
->language
== language_d
14209 || cu
->language
== language_rust
)
14211 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
14213 /* dwarf2_full_name might have already finished building the DIE's
14214 type. If so, there is no need to continue. */
14215 if (get_die_type (die
, cu
) != NULL
)
14216 return get_die_type (die
, cu
);
14218 TYPE_TAG_NAME (type
) = full_name
;
14219 if (die
->tag
== DW_TAG_structure_type
14220 || die
->tag
== DW_TAG_class_type
)
14221 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
14225 /* The name is already allocated along with this objfile, so
14226 we don't need to duplicate it for the type. */
14227 TYPE_TAG_NAME (type
) = name
;
14228 if (die
->tag
== DW_TAG_class_type
)
14229 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
14233 if (die
->tag
== DW_TAG_structure_type
)
14235 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
14237 else if (die
->tag
== DW_TAG_union_type
)
14239 TYPE_CODE (type
) = TYPE_CODE_UNION
;
14243 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
14246 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
14247 TYPE_DECLARED_CLASS (type
) = 1;
14249 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14252 if (attr_form_is_constant (attr
))
14253 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14256 /* For the moment, dynamic type sizes are not supported
14257 by GDB's struct type. The actual size is determined
14258 on-demand when resolving the type of a given object,
14259 so set the type's length to zero for now. Otherwise,
14260 we record an expression as the length, and that expression
14261 could lead to a very large value, which could eventually
14262 lead to us trying to allocate that much memory when creating
14263 a value of that type. */
14264 TYPE_LENGTH (type
) = 0;
14269 TYPE_LENGTH (type
) = 0;
14272 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
14274 /* ICC<14 does not output the required DW_AT_declaration on
14275 incomplete types, but gives them a size of zero. */
14276 TYPE_STUB (type
) = 1;
14279 TYPE_STUB_SUPPORTED (type
) = 1;
14281 if (die_is_declaration (die
, cu
))
14282 TYPE_STUB (type
) = 1;
14283 else if (attr
== NULL
&& die
->child
== NULL
14284 && producer_is_realview (cu
->producer
))
14285 /* RealView does not output the required DW_AT_declaration
14286 on incomplete types. */
14287 TYPE_STUB (type
) = 1;
14289 /* We need to add the type field to the die immediately so we don't
14290 infinitely recurse when dealing with pointers to the structure
14291 type within the structure itself. */
14292 set_die_type (die
, type
, cu
);
14294 /* set_die_type should be already done. */
14295 set_descriptive_type (type
, die
, cu
);
14300 /* Finish creating a structure or union type, including filling in
14301 its members and creating a symbol for it. */
14304 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14306 struct objfile
*objfile
= cu
->objfile
;
14307 struct die_info
*child_die
;
14310 type
= get_die_type (die
, cu
);
14312 type
= read_structure_type (die
, cu
);
14314 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
14316 struct field_info fi
;
14317 VEC (symbolp
) *template_args
= NULL
;
14318 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
14320 memset (&fi
, 0, sizeof (struct field_info
));
14322 child_die
= die
->child
;
14324 while (child_die
&& child_die
->tag
)
14326 if (child_die
->tag
== DW_TAG_member
14327 || child_die
->tag
== DW_TAG_variable
)
14329 /* NOTE: carlton/2002-11-05: A C++ static data member
14330 should be a DW_TAG_member that is a declaration, but
14331 all versions of G++ as of this writing (so through at
14332 least 3.2.1) incorrectly generate DW_TAG_variable
14333 tags for them instead. */
14334 dwarf2_add_field (&fi
, child_die
, cu
);
14336 else if (child_die
->tag
== DW_TAG_subprogram
)
14338 /* Rust doesn't have member functions in the C++ sense.
14339 However, it does emit ordinary functions as children
14340 of a struct DIE. */
14341 if (cu
->language
== language_rust
)
14342 read_func_scope (child_die
, cu
);
14345 /* C++ member function. */
14346 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
14349 else if (child_die
->tag
== DW_TAG_inheritance
)
14351 /* C++ base class field. */
14352 dwarf2_add_field (&fi
, child_die
, cu
);
14354 else if (child_die
->tag
== DW_TAG_typedef
)
14355 dwarf2_add_typedef (&fi
, child_die
, cu
);
14356 else if (child_die
->tag
== DW_TAG_template_type_param
14357 || child_die
->tag
== DW_TAG_template_value_param
)
14359 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
14362 VEC_safe_push (symbolp
, template_args
, arg
);
14365 child_die
= sibling_die (child_die
);
14368 /* Attach template arguments to type. */
14369 if (! VEC_empty (symbolp
, template_args
))
14371 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14372 TYPE_N_TEMPLATE_ARGUMENTS (type
)
14373 = VEC_length (symbolp
, template_args
);
14374 TYPE_TEMPLATE_ARGUMENTS (type
)
14375 = XOBNEWVEC (&objfile
->objfile_obstack
,
14377 TYPE_N_TEMPLATE_ARGUMENTS (type
));
14378 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
14379 VEC_address (symbolp
, template_args
),
14380 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
14381 * sizeof (struct symbol
*)));
14382 VEC_free (symbolp
, template_args
);
14385 /* Attach fields and member functions to the type. */
14387 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
14390 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
14392 /* Get the type which refers to the base class (possibly this
14393 class itself) which contains the vtable pointer for the current
14394 class from the DW_AT_containing_type attribute. This use of
14395 DW_AT_containing_type is a GNU extension. */
14397 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
14399 struct type
*t
= die_containing_type (die
, cu
);
14401 set_type_vptr_basetype (type
, t
);
14406 /* Our own class provides vtbl ptr. */
14407 for (i
= TYPE_NFIELDS (t
) - 1;
14408 i
>= TYPE_N_BASECLASSES (t
);
14411 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
14413 if (is_vtable_name (fieldname
, cu
))
14415 set_type_vptr_fieldno (type
, i
);
14420 /* Complain if virtual function table field not found. */
14421 if (i
< TYPE_N_BASECLASSES (t
))
14422 complaint (&symfile_complaints
,
14423 _("virtual function table pointer "
14424 "not found when defining class '%s'"),
14425 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
14430 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
14433 else if (cu
->producer
14434 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
14436 /* The IBM XLC compiler does not provide direct indication
14437 of the containing type, but the vtable pointer is
14438 always named __vfp. */
14442 for (i
= TYPE_NFIELDS (type
) - 1;
14443 i
>= TYPE_N_BASECLASSES (type
);
14446 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
14448 set_type_vptr_fieldno (type
, i
);
14449 set_type_vptr_basetype (type
, type
);
14456 /* Copy fi.typedef_field_list linked list elements content into the
14457 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
14458 if (fi
.typedef_field_list
)
14460 int i
= fi
.typedef_field_list_count
;
14462 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14463 TYPE_TYPEDEF_FIELD_ARRAY (type
)
14464 = ((struct typedef_field
*)
14465 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
14466 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
14468 /* Reverse the list order to keep the debug info elements order. */
14471 struct typedef_field
*dest
, *src
;
14473 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
14474 src
= &fi
.typedef_field_list
->field
;
14475 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
14480 do_cleanups (back_to
);
14483 quirk_gcc_member_function_pointer (type
, objfile
);
14485 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
14486 snapshots) has been known to create a die giving a declaration
14487 for a class that has, as a child, a die giving a definition for a
14488 nested class. So we have to process our children even if the
14489 current die is a declaration. Normally, of course, a declaration
14490 won't have any children at all. */
14492 child_die
= die
->child
;
14494 while (child_die
!= NULL
&& child_die
->tag
)
14496 if (child_die
->tag
== DW_TAG_member
14497 || child_die
->tag
== DW_TAG_variable
14498 || child_die
->tag
== DW_TAG_inheritance
14499 || child_die
->tag
== DW_TAG_template_value_param
14500 || child_die
->tag
== DW_TAG_template_type_param
)
14505 process_die (child_die
, cu
);
14507 child_die
= sibling_die (child_die
);
14510 /* Do not consider external references. According to the DWARF standard,
14511 these DIEs are identified by the fact that they have no byte_size
14512 attribute, and a declaration attribute. */
14513 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
14514 || !die_is_declaration (die
, cu
))
14515 new_symbol (die
, type
, cu
);
14518 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
14519 update TYPE using some information only available in DIE's children. */
14522 update_enumeration_type_from_children (struct die_info
*die
,
14524 struct dwarf2_cu
*cu
)
14526 struct die_info
*child_die
;
14527 int unsigned_enum
= 1;
14531 auto_obstack obstack
;
14533 for (child_die
= die
->child
;
14534 child_die
!= NULL
&& child_die
->tag
;
14535 child_die
= sibling_die (child_die
))
14537 struct attribute
*attr
;
14539 const gdb_byte
*bytes
;
14540 struct dwarf2_locexpr_baton
*baton
;
14543 if (child_die
->tag
!= DW_TAG_enumerator
)
14546 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
14550 name
= dwarf2_name (child_die
, cu
);
14552 name
= "<anonymous enumerator>";
14554 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
14555 &value
, &bytes
, &baton
);
14561 else if ((mask
& value
) != 0)
14566 /* If we already know that the enum type is neither unsigned, nor
14567 a flag type, no need to look at the rest of the enumerates. */
14568 if (!unsigned_enum
&& !flag_enum
)
14573 TYPE_UNSIGNED (type
) = 1;
14575 TYPE_FLAG_ENUM (type
) = 1;
14578 /* Given a DW_AT_enumeration_type die, set its type. We do not
14579 complete the type's fields yet, or create any symbols. */
14581 static struct type
*
14582 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14584 struct objfile
*objfile
= cu
->objfile
;
14586 struct attribute
*attr
;
14589 /* If the definition of this type lives in .debug_types, read that type.
14590 Don't follow DW_AT_specification though, that will take us back up
14591 the chain and we want to go down. */
14592 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14595 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14597 /* The type's CU may not be the same as CU.
14598 Ensure TYPE is recorded with CU in die_type_hash. */
14599 return set_die_type (die
, type
, cu
);
14602 type
= alloc_type (objfile
);
14604 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
14605 name
= dwarf2_full_name (NULL
, die
, cu
);
14607 TYPE_TAG_NAME (type
) = name
;
14609 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14612 struct type
*underlying_type
= die_type (die
, cu
);
14614 TYPE_TARGET_TYPE (type
) = underlying_type
;
14617 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14620 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14624 TYPE_LENGTH (type
) = 0;
14627 /* The enumeration DIE can be incomplete. In Ada, any type can be
14628 declared as private in the package spec, and then defined only
14629 inside the package body. Such types are known as Taft Amendment
14630 Types. When another package uses such a type, an incomplete DIE
14631 may be generated by the compiler. */
14632 if (die_is_declaration (die
, cu
))
14633 TYPE_STUB (type
) = 1;
14635 /* Finish the creation of this type by using the enum's children.
14636 We must call this even when the underlying type has been provided
14637 so that we can determine if we're looking at a "flag" enum. */
14638 update_enumeration_type_from_children (die
, type
, cu
);
14640 /* If this type has an underlying type that is not a stub, then we
14641 may use its attributes. We always use the "unsigned" attribute
14642 in this situation, because ordinarily we guess whether the type
14643 is unsigned -- but the guess can be wrong and the underlying type
14644 can tell us the reality. However, we defer to a local size
14645 attribute if one exists, because this lets the compiler override
14646 the underlying type if needed. */
14647 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
14649 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
14650 if (TYPE_LENGTH (type
) == 0)
14651 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
14654 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
14656 return set_die_type (die
, type
, cu
);
14659 /* Given a pointer to a die which begins an enumeration, process all
14660 the dies that define the members of the enumeration, and create the
14661 symbol for the enumeration type.
14663 NOTE: We reverse the order of the element list. */
14666 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14668 struct type
*this_type
;
14670 this_type
= get_die_type (die
, cu
);
14671 if (this_type
== NULL
)
14672 this_type
= read_enumeration_type (die
, cu
);
14674 if (die
->child
!= NULL
)
14676 struct die_info
*child_die
;
14677 struct symbol
*sym
;
14678 struct field
*fields
= NULL
;
14679 int num_fields
= 0;
14682 child_die
= die
->child
;
14683 while (child_die
&& child_die
->tag
)
14685 if (child_die
->tag
!= DW_TAG_enumerator
)
14687 process_die (child_die
, cu
);
14691 name
= dwarf2_name (child_die
, cu
);
14694 sym
= new_symbol (child_die
, this_type
, cu
);
14696 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14698 fields
= (struct field
*)
14700 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
14701 * sizeof (struct field
));
14704 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
14705 FIELD_TYPE (fields
[num_fields
]) = NULL
;
14706 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
14707 FIELD_BITSIZE (fields
[num_fields
]) = 0;
14713 child_die
= sibling_die (child_die
);
14718 TYPE_NFIELDS (this_type
) = num_fields
;
14719 TYPE_FIELDS (this_type
) = (struct field
*)
14720 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
14721 memcpy (TYPE_FIELDS (this_type
), fields
,
14722 sizeof (struct field
) * num_fields
);
14727 /* If we are reading an enum from a .debug_types unit, and the enum
14728 is a declaration, and the enum is not the signatured type in the
14729 unit, then we do not want to add a symbol for it. Adding a
14730 symbol would in some cases obscure the true definition of the
14731 enum, giving users an incomplete type when the definition is
14732 actually available. Note that we do not want to do this for all
14733 enums which are just declarations, because C++0x allows forward
14734 enum declarations. */
14735 if (cu
->per_cu
->is_debug_types
14736 && die_is_declaration (die
, cu
))
14738 struct signatured_type
*sig_type
;
14740 sig_type
= (struct signatured_type
*) cu
->per_cu
;
14741 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
14742 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
14746 new_symbol (die
, this_type
, cu
);
14749 /* Extract all information from a DW_TAG_array_type DIE and put it in
14750 the DIE's type field. For now, this only handles one dimensional
14753 static struct type
*
14754 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14756 struct objfile
*objfile
= cu
->objfile
;
14757 struct die_info
*child_die
;
14759 struct type
*element_type
, *range_type
, *index_type
;
14760 struct attribute
*attr
;
14762 unsigned int bit_stride
= 0;
14764 element_type
= die_type (die
, cu
);
14766 /* The die_type call above may have already set the type for this DIE. */
14767 type
= get_die_type (die
, cu
);
14771 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
14773 bit_stride
= DW_UNSND (attr
) * 8;
14775 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
14777 bit_stride
= DW_UNSND (attr
);
14779 /* Irix 6.2 native cc creates array types without children for
14780 arrays with unspecified length. */
14781 if (die
->child
== NULL
)
14783 index_type
= objfile_type (objfile
)->builtin_int
;
14784 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
14785 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
14787 return set_die_type (die
, type
, cu
);
14790 std::vector
<struct type
*> range_types
;
14791 child_die
= die
->child
;
14792 while (child_die
&& child_die
->tag
)
14794 if (child_die
->tag
== DW_TAG_subrange_type
)
14796 struct type
*child_type
= read_type_die (child_die
, cu
);
14798 if (child_type
!= NULL
)
14800 /* The range type was succesfully read. Save it for the
14801 array type creation. */
14802 range_types
.push_back (child_type
);
14805 child_die
= sibling_die (child_die
);
14808 /* Dwarf2 dimensions are output from left to right, create the
14809 necessary array types in backwards order. */
14811 type
= element_type
;
14813 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
14817 while (i
< range_types
.size ())
14818 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
14823 size_t ndim
= range_types
.size ();
14825 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
14829 /* Understand Dwarf2 support for vector types (like they occur on
14830 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
14831 array type. This is not part of the Dwarf2/3 standard yet, but a
14832 custom vendor extension. The main difference between a regular
14833 array and the vector variant is that vectors are passed by value
14835 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
14837 make_vector_type (type
);
14839 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
14840 implementation may choose to implement triple vectors using this
14842 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14845 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
14846 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14848 complaint (&symfile_complaints
,
14849 _("DW_AT_byte_size for array type smaller "
14850 "than the total size of elements"));
14853 name
= dwarf2_name (die
, cu
);
14855 TYPE_NAME (type
) = name
;
14857 /* Install the type in the die. */
14858 set_die_type (die
, type
, cu
);
14860 /* set_die_type should be already done. */
14861 set_descriptive_type (type
, die
, cu
);
14866 static enum dwarf_array_dim_ordering
14867 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
14869 struct attribute
*attr
;
14871 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
14874 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
14876 /* GNU F77 is a special case, as at 08/2004 array type info is the
14877 opposite order to the dwarf2 specification, but data is still
14878 laid out as per normal fortran.
14880 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
14881 version checking. */
14883 if (cu
->language
== language_fortran
14884 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
14886 return DW_ORD_row_major
;
14889 switch (cu
->language_defn
->la_array_ordering
)
14891 case array_column_major
:
14892 return DW_ORD_col_major
;
14893 case array_row_major
:
14895 return DW_ORD_row_major
;
14899 /* Extract all information from a DW_TAG_set_type DIE and put it in
14900 the DIE's type field. */
14902 static struct type
*
14903 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14905 struct type
*domain_type
, *set_type
;
14906 struct attribute
*attr
;
14908 domain_type
= die_type (die
, cu
);
14910 /* The die_type call above may have already set the type for this DIE. */
14911 set_type
= get_die_type (die
, cu
);
14915 set_type
= create_set_type (NULL
, domain_type
);
14917 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14919 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
14921 return set_die_type (die
, set_type
, cu
);
14924 /* A helper for read_common_block that creates a locexpr baton.
14925 SYM is the symbol which we are marking as computed.
14926 COMMON_DIE is the DIE for the common block.
14927 COMMON_LOC is the location expression attribute for the common
14929 MEMBER_LOC is the location expression attribute for the particular
14930 member of the common block that we are processing.
14931 CU is the CU from which the above come. */
14934 mark_common_block_symbol_computed (struct symbol
*sym
,
14935 struct die_info
*common_die
,
14936 struct attribute
*common_loc
,
14937 struct attribute
*member_loc
,
14938 struct dwarf2_cu
*cu
)
14940 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14941 struct dwarf2_locexpr_baton
*baton
;
14943 unsigned int cu_off
;
14944 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
14945 LONGEST offset
= 0;
14947 gdb_assert (common_loc
&& member_loc
);
14948 gdb_assert (attr_form_is_block (common_loc
));
14949 gdb_assert (attr_form_is_block (member_loc
)
14950 || attr_form_is_constant (member_loc
));
14952 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14953 baton
->per_cu
= cu
->per_cu
;
14954 gdb_assert (baton
->per_cu
);
14956 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
14958 if (attr_form_is_constant (member_loc
))
14960 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
14961 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
14964 baton
->size
+= DW_BLOCK (member_loc
)->size
;
14966 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
14969 *ptr
++ = DW_OP_call4
;
14970 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
14971 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
14974 if (attr_form_is_constant (member_loc
))
14976 *ptr
++ = DW_OP_addr
;
14977 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
14978 ptr
+= cu
->header
.addr_size
;
14982 /* We have to copy the data here, because DW_OP_call4 will only
14983 use a DW_AT_location attribute. */
14984 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
14985 ptr
+= DW_BLOCK (member_loc
)->size
;
14988 *ptr
++ = DW_OP_plus
;
14989 gdb_assert (ptr
- baton
->data
== baton
->size
);
14991 SYMBOL_LOCATION_BATON (sym
) = baton
;
14992 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
14995 /* Create appropriate locally-scoped variables for all the
14996 DW_TAG_common_block entries. Also create a struct common_block
14997 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
14998 is used to sepate the common blocks name namespace from regular
15002 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
15004 struct attribute
*attr
;
15006 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15009 /* Support the .debug_loc offsets. */
15010 if (attr_form_is_block (attr
))
15014 else if (attr_form_is_section_offset (attr
))
15016 dwarf2_complex_location_expr_complaint ();
15021 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15022 "common block member");
15027 if (die
->child
!= NULL
)
15029 struct objfile
*objfile
= cu
->objfile
;
15030 struct die_info
*child_die
;
15031 size_t n_entries
= 0, size
;
15032 struct common_block
*common_block
;
15033 struct symbol
*sym
;
15035 for (child_die
= die
->child
;
15036 child_die
&& child_die
->tag
;
15037 child_die
= sibling_die (child_die
))
15040 size
= (sizeof (struct common_block
)
15041 + (n_entries
- 1) * sizeof (struct symbol
*));
15043 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
15045 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
15046 common_block
->n_entries
= 0;
15048 for (child_die
= die
->child
;
15049 child_die
&& child_die
->tag
;
15050 child_die
= sibling_die (child_die
))
15052 /* Create the symbol in the DW_TAG_common_block block in the current
15054 sym
= new_symbol (child_die
, NULL
, cu
);
15057 struct attribute
*member_loc
;
15059 common_block
->contents
[common_block
->n_entries
++] = sym
;
15061 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
15065 /* GDB has handled this for a long time, but it is
15066 not specified by DWARF. It seems to have been
15067 emitted by gfortran at least as recently as:
15068 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
15069 complaint (&symfile_complaints
,
15070 _("Variable in common block has "
15071 "DW_AT_data_member_location "
15072 "- DIE at 0x%x [in module %s]"),
15073 to_underlying (child_die
->sect_off
),
15074 objfile_name (cu
->objfile
));
15076 if (attr_form_is_section_offset (member_loc
))
15077 dwarf2_complex_location_expr_complaint ();
15078 else if (attr_form_is_constant (member_loc
)
15079 || attr_form_is_block (member_loc
))
15082 mark_common_block_symbol_computed (sym
, die
, attr
,
15086 dwarf2_complex_location_expr_complaint ();
15091 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
15092 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
15096 /* Create a type for a C++ namespace. */
15098 static struct type
*
15099 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15101 struct objfile
*objfile
= cu
->objfile
;
15102 const char *previous_prefix
, *name
;
15106 /* For extensions, reuse the type of the original namespace. */
15107 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
15109 struct die_info
*ext_die
;
15110 struct dwarf2_cu
*ext_cu
= cu
;
15112 ext_die
= dwarf2_extension (die
, &ext_cu
);
15113 type
= read_type_die (ext_die
, ext_cu
);
15115 /* EXT_CU may not be the same as CU.
15116 Ensure TYPE is recorded with CU in die_type_hash. */
15117 return set_die_type (die
, type
, cu
);
15120 name
= namespace_name (die
, &is_anonymous
, cu
);
15122 /* Now build the name of the current namespace. */
15124 previous_prefix
= determine_prefix (die
, cu
);
15125 if (previous_prefix
[0] != '\0')
15126 name
= typename_concat (&objfile
->objfile_obstack
,
15127 previous_prefix
, name
, 0, cu
);
15129 /* Create the type. */
15130 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
15131 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
15133 return set_die_type (die
, type
, cu
);
15136 /* Read a namespace scope. */
15139 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
15141 struct objfile
*objfile
= cu
->objfile
;
15144 /* Add a symbol associated to this if we haven't seen the namespace
15145 before. Also, add a using directive if it's an anonymous
15148 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
15152 type
= read_type_die (die
, cu
);
15153 new_symbol (die
, type
, cu
);
15155 namespace_name (die
, &is_anonymous
, cu
);
15158 const char *previous_prefix
= determine_prefix (die
, cu
);
15160 std::vector
<const char *> excludes
;
15161 add_using_directive (using_directives (cu
->language
),
15162 previous_prefix
, TYPE_NAME (type
), NULL
,
15163 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
15167 if (die
->child
!= NULL
)
15169 struct die_info
*child_die
= die
->child
;
15171 while (child_die
&& child_die
->tag
)
15173 process_die (child_die
, cu
);
15174 child_die
= sibling_die (child_die
);
15179 /* Read a Fortran module as type. This DIE can be only a declaration used for
15180 imported module. Still we need that type as local Fortran "use ... only"
15181 declaration imports depend on the created type in determine_prefix. */
15183 static struct type
*
15184 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15186 struct objfile
*objfile
= cu
->objfile
;
15187 const char *module_name
;
15190 module_name
= dwarf2_name (die
, cu
);
15192 complaint (&symfile_complaints
,
15193 _("DW_TAG_module has no name, offset 0x%x"),
15194 to_underlying (die
->sect_off
));
15195 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
15197 /* determine_prefix uses TYPE_TAG_NAME. */
15198 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
15200 return set_die_type (die
, type
, cu
);
15203 /* Read a Fortran module. */
15206 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
15208 struct die_info
*child_die
= die
->child
;
15211 type
= read_type_die (die
, cu
);
15212 new_symbol (die
, type
, cu
);
15214 while (child_die
&& child_die
->tag
)
15216 process_die (child_die
, cu
);
15217 child_die
= sibling_die (child_die
);
15221 /* Return the name of the namespace represented by DIE. Set
15222 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
15225 static const char *
15226 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
15228 struct die_info
*current_die
;
15229 const char *name
= NULL
;
15231 /* Loop through the extensions until we find a name. */
15233 for (current_die
= die
;
15234 current_die
!= NULL
;
15235 current_die
= dwarf2_extension (die
, &cu
))
15237 /* We don't use dwarf2_name here so that we can detect the absence
15238 of a name -> anonymous namespace. */
15239 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
15245 /* Is it an anonymous namespace? */
15247 *is_anonymous
= (name
== NULL
);
15249 name
= CP_ANONYMOUS_NAMESPACE_STR
;
15254 /* Extract all information from a DW_TAG_pointer_type DIE and add to
15255 the user defined type vector. */
15257 static struct type
*
15258 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15260 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
15261 struct comp_unit_head
*cu_header
= &cu
->header
;
15263 struct attribute
*attr_byte_size
;
15264 struct attribute
*attr_address_class
;
15265 int byte_size
, addr_class
;
15266 struct type
*target_type
;
15268 target_type
= die_type (die
, cu
);
15270 /* The die_type call above may have already set the type for this DIE. */
15271 type
= get_die_type (die
, cu
);
15275 type
= lookup_pointer_type (target_type
);
15277 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15278 if (attr_byte_size
)
15279 byte_size
= DW_UNSND (attr_byte_size
);
15281 byte_size
= cu_header
->addr_size
;
15283 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
15284 if (attr_address_class
)
15285 addr_class
= DW_UNSND (attr_address_class
);
15287 addr_class
= DW_ADDR_none
;
15289 /* If the pointer size or address class is different than the
15290 default, create a type variant marked as such and set the
15291 length accordingly. */
15292 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
15294 if (gdbarch_address_class_type_flags_p (gdbarch
))
15298 type_flags
= gdbarch_address_class_type_flags
15299 (gdbarch
, byte_size
, addr_class
);
15300 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
15302 type
= make_type_with_address_space (type
, type_flags
);
15304 else if (TYPE_LENGTH (type
) != byte_size
)
15306 complaint (&symfile_complaints
,
15307 _("invalid pointer size %d"), byte_size
);
15311 /* Should we also complain about unhandled address classes? */
15315 TYPE_LENGTH (type
) = byte_size
;
15316 return set_die_type (die
, type
, cu
);
15319 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
15320 the user defined type vector. */
15322 static struct type
*
15323 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15326 struct type
*to_type
;
15327 struct type
*domain
;
15329 to_type
= die_type (die
, cu
);
15330 domain
= die_containing_type (die
, cu
);
15332 /* The calls above may have already set the type for this DIE. */
15333 type
= get_die_type (die
, cu
);
15337 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
15338 type
= lookup_methodptr_type (to_type
);
15339 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
15341 struct type
*new_type
= alloc_type (cu
->objfile
);
15343 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
15344 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
15345 TYPE_VARARGS (to_type
));
15346 type
= lookup_methodptr_type (new_type
);
15349 type
= lookup_memberptr_type (to_type
, domain
);
15351 return set_die_type (die
, type
, cu
);
15354 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
15355 the user defined type vector. */
15357 static struct type
*
15358 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
15359 enum type_code refcode
)
15361 struct comp_unit_head
*cu_header
= &cu
->header
;
15362 struct type
*type
, *target_type
;
15363 struct attribute
*attr
;
15365 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
15367 target_type
= die_type (die
, cu
);
15369 /* The die_type call above may have already set the type for this DIE. */
15370 type
= get_die_type (die
, cu
);
15374 type
= lookup_reference_type (target_type
, refcode
);
15375 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15378 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15382 TYPE_LENGTH (type
) = cu_header
->addr_size
;
15384 return set_die_type (die
, type
, cu
);
15387 /* Add the given cv-qualifiers to the element type of the array. GCC
15388 outputs DWARF type qualifiers that apply to an array, not the
15389 element type. But GDB relies on the array element type to carry
15390 the cv-qualifiers. This mimics section 6.7.3 of the C99
15393 static struct type
*
15394 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
15395 struct type
*base_type
, int cnst
, int voltl
)
15397 struct type
*el_type
, *inner_array
;
15399 base_type
= copy_type (base_type
);
15400 inner_array
= base_type
;
15402 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
15404 TYPE_TARGET_TYPE (inner_array
) =
15405 copy_type (TYPE_TARGET_TYPE (inner_array
));
15406 inner_array
= TYPE_TARGET_TYPE (inner_array
);
15409 el_type
= TYPE_TARGET_TYPE (inner_array
);
15410 cnst
|= TYPE_CONST (el_type
);
15411 voltl
|= TYPE_VOLATILE (el_type
);
15412 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
15414 return set_die_type (die
, base_type
, cu
);
15417 static struct type
*
15418 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15420 struct type
*base_type
, *cv_type
;
15422 base_type
= die_type (die
, cu
);
15424 /* The die_type call above may have already set the type for this DIE. */
15425 cv_type
= get_die_type (die
, cu
);
15429 /* In case the const qualifier is applied to an array type, the element type
15430 is so qualified, not the array type (section 6.7.3 of C99). */
15431 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
15432 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
15434 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
15435 return set_die_type (die
, cv_type
, cu
);
15438 static struct type
*
15439 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15441 struct type
*base_type
, *cv_type
;
15443 base_type
= die_type (die
, cu
);
15445 /* The die_type call above may have already set the type for this DIE. */
15446 cv_type
= get_die_type (die
, cu
);
15450 /* In case the volatile qualifier is applied to an array type, the
15451 element type is so qualified, not the array type (section 6.7.3
15453 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
15454 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
15456 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
15457 return set_die_type (die
, cv_type
, cu
);
15460 /* Handle DW_TAG_restrict_type. */
15462 static struct type
*
15463 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15465 struct type
*base_type
, *cv_type
;
15467 base_type
= die_type (die
, cu
);
15469 /* The die_type call above may have already set the type for this DIE. */
15470 cv_type
= get_die_type (die
, cu
);
15474 cv_type
= make_restrict_type (base_type
);
15475 return set_die_type (die
, cv_type
, cu
);
15478 /* Handle DW_TAG_atomic_type. */
15480 static struct type
*
15481 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15483 struct type
*base_type
, *cv_type
;
15485 base_type
= die_type (die
, cu
);
15487 /* The die_type call above may have already set the type for this DIE. */
15488 cv_type
= get_die_type (die
, cu
);
15492 cv_type
= make_atomic_type (base_type
);
15493 return set_die_type (die
, cv_type
, cu
);
15496 /* Extract all information from a DW_TAG_string_type DIE and add to
15497 the user defined type vector. It isn't really a user defined type,
15498 but it behaves like one, with other DIE's using an AT_user_def_type
15499 attribute to reference it. */
15501 static struct type
*
15502 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15504 struct objfile
*objfile
= cu
->objfile
;
15505 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15506 struct type
*type
, *range_type
, *index_type
, *char_type
;
15507 struct attribute
*attr
;
15508 unsigned int length
;
15510 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
15513 length
= DW_UNSND (attr
);
15517 /* Check for the DW_AT_byte_size attribute. */
15518 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15521 length
= DW_UNSND (attr
);
15529 index_type
= objfile_type (objfile
)->builtin_int
;
15530 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
15531 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
15532 type
= create_string_type (NULL
, char_type
, range_type
);
15534 return set_die_type (die
, type
, cu
);
15537 /* Assuming that DIE corresponds to a function, returns nonzero
15538 if the function is prototyped. */
15541 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
15543 struct attribute
*attr
;
15545 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
15546 if (attr
&& (DW_UNSND (attr
) != 0))
15549 /* The DWARF standard implies that the DW_AT_prototyped attribute
15550 is only meaninful for C, but the concept also extends to other
15551 languages that allow unprototyped functions (Eg: Objective C).
15552 For all other languages, assume that functions are always
15554 if (cu
->language
!= language_c
15555 && cu
->language
!= language_objc
15556 && cu
->language
!= language_opencl
)
15559 /* RealView does not emit DW_AT_prototyped. We can not distinguish
15560 prototyped and unprototyped functions; default to prototyped,
15561 since that is more common in modern code (and RealView warns
15562 about unprototyped functions). */
15563 if (producer_is_realview (cu
->producer
))
15569 /* Handle DIES due to C code like:
15573 int (*funcp)(int a, long l);
15577 ('funcp' generates a DW_TAG_subroutine_type DIE). */
15579 static struct type
*
15580 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15582 struct objfile
*objfile
= cu
->objfile
;
15583 struct type
*type
; /* Type that this function returns. */
15584 struct type
*ftype
; /* Function that returns above type. */
15585 struct attribute
*attr
;
15587 type
= die_type (die
, cu
);
15589 /* The die_type call above may have already set the type for this DIE. */
15590 ftype
= get_die_type (die
, cu
);
15594 ftype
= lookup_function_type (type
);
15596 if (prototyped_function_p (die
, cu
))
15597 TYPE_PROTOTYPED (ftype
) = 1;
15599 /* Store the calling convention in the type if it's available in
15600 the subroutine die. Otherwise set the calling convention to
15601 the default value DW_CC_normal. */
15602 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15604 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
15605 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
15606 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
15608 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
15610 /* Record whether the function returns normally to its caller or not
15611 if the DWARF producer set that information. */
15612 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
15613 if (attr
&& (DW_UNSND (attr
) != 0))
15614 TYPE_NO_RETURN (ftype
) = 1;
15616 /* We need to add the subroutine type to the die immediately so
15617 we don't infinitely recurse when dealing with parameters
15618 declared as the same subroutine type. */
15619 set_die_type (die
, ftype
, cu
);
15621 if (die
->child
!= NULL
)
15623 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
15624 struct die_info
*child_die
;
15625 int nparams
, iparams
;
15627 /* Count the number of parameters.
15628 FIXME: GDB currently ignores vararg functions, but knows about
15629 vararg member functions. */
15631 child_die
= die
->child
;
15632 while (child_die
&& child_die
->tag
)
15634 if (child_die
->tag
== DW_TAG_formal_parameter
)
15636 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
15637 TYPE_VARARGS (ftype
) = 1;
15638 child_die
= sibling_die (child_die
);
15641 /* Allocate storage for parameters and fill them in. */
15642 TYPE_NFIELDS (ftype
) = nparams
;
15643 TYPE_FIELDS (ftype
) = (struct field
*)
15644 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
15646 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
15647 even if we error out during the parameters reading below. */
15648 for (iparams
= 0; iparams
< nparams
; iparams
++)
15649 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
15652 child_die
= die
->child
;
15653 while (child_die
&& child_die
->tag
)
15655 if (child_die
->tag
== DW_TAG_formal_parameter
)
15657 struct type
*arg_type
;
15659 /* DWARF version 2 has no clean way to discern C++
15660 static and non-static member functions. G++ helps
15661 GDB by marking the first parameter for non-static
15662 member functions (which is the this pointer) as
15663 artificial. We pass this information to
15664 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
15666 DWARF version 3 added DW_AT_object_pointer, which GCC
15667 4.5 does not yet generate. */
15668 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
15670 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
15672 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
15673 arg_type
= die_type (child_die
, cu
);
15675 /* RealView does not mark THIS as const, which the testsuite
15676 expects. GCC marks THIS as const in method definitions,
15677 but not in the class specifications (GCC PR 43053). */
15678 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
15679 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
15682 struct dwarf2_cu
*arg_cu
= cu
;
15683 const char *name
= dwarf2_name (child_die
, cu
);
15685 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
15688 /* If the compiler emits this, use it. */
15689 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
15692 else if (name
&& strcmp (name
, "this") == 0)
15693 /* Function definitions will have the argument names. */
15695 else if (name
== NULL
&& iparams
== 0)
15696 /* Declarations may not have the names, so like
15697 elsewhere in GDB, assume an artificial first
15698 argument is "this". */
15702 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
15706 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
15709 child_die
= sibling_die (child_die
);
15716 static struct type
*
15717 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
15719 struct objfile
*objfile
= cu
->objfile
;
15720 const char *name
= NULL
;
15721 struct type
*this_type
, *target_type
;
15723 name
= dwarf2_full_name (NULL
, die
, cu
);
15724 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
15725 TYPE_TARGET_STUB (this_type
) = 1;
15726 set_die_type (die
, this_type
, cu
);
15727 target_type
= die_type (die
, cu
);
15728 if (target_type
!= this_type
)
15729 TYPE_TARGET_TYPE (this_type
) = target_type
;
15732 /* Self-referential typedefs are, it seems, not allowed by the DWARF
15733 spec and cause infinite loops in GDB. */
15734 complaint (&symfile_complaints
,
15735 _("Self-referential DW_TAG_typedef "
15736 "- DIE at 0x%x [in module %s]"),
15737 to_underlying (die
->sect_off
), objfile_name (objfile
));
15738 TYPE_TARGET_TYPE (this_type
) = NULL
;
15743 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
15744 (which may be different from NAME) to the architecture back-end to allow
15745 it to guess the correct format if necessary. */
15747 static struct type
*
15748 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
15749 const char *name_hint
)
15751 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15752 const struct floatformat
**format
;
15755 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
15757 type
= init_float_type (objfile
, bits
, name
, format
);
15759 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
15764 /* Find a representation of a given base type and install
15765 it in the TYPE field of the die. */
15767 static struct type
*
15768 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15770 struct objfile
*objfile
= cu
->objfile
;
15772 struct attribute
*attr
;
15773 int encoding
= 0, bits
= 0;
15776 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
15779 encoding
= DW_UNSND (attr
);
15781 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15784 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
15786 name
= dwarf2_name (die
, cu
);
15789 complaint (&symfile_complaints
,
15790 _("DW_AT_name missing from DW_TAG_base_type"));
15795 case DW_ATE_address
:
15796 /* Turn DW_ATE_address into a void * pointer. */
15797 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
15798 type
= init_pointer_type (objfile
, bits
, name
, type
);
15800 case DW_ATE_boolean
:
15801 type
= init_boolean_type (objfile
, bits
, 1, name
);
15803 case DW_ATE_complex_float
:
15804 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
15805 type
= init_complex_type (objfile
, name
, type
);
15807 case DW_ATE_decimal_float
:
15808 type
= init_decfloat_type (objfile
, bits
, name
);
15811 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
15813 case DW_ATE_signed
:
15814 type
= init_integer_type (objfile
, bits
, 0, name
);
15816 case DW_ATE_unsigned
:
15817 if (cu
->language
== language_fortran
15819 && startswith (name
, "character("))
15820 type
= init_character_type (objfile
, bits
, 1, name
);
15822 type
= init_integer_type (objfile
, bits
, 1, name
);
15824 case DW_ATE_signed_char
:
15825 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15826 || cu
->language
== language_pascal
15827 || cu
->language
== language_fortran
)
15828 type
= init_character_type (objfile
, bits
, 0, name
);
15830 type
= init_integer_type (objfile
, bits
, 0, name
);
15832 case DW_ATE_unsigned_char
:
15833 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15834 || cu
->language
== language_pascal
15835 || cu
->language
== language_fortran
15836 || cu
->language
== language_rust
)
15837 type
= init_character_type (objfile
, bits
, 1, name
);
15839 type
= init_integer_type (objfile
, bits
, 1, name
);
15843 gdbarch
*arch
= get_objfile_arch (objfile
);
15846 type
= builtin_type (arch
)->builtin_char16
;
15847 else if (bits
== 32)
15848 type
= builtin_type (arch
)->builtin_char32
;
15851 complaint (&symfile_complaints
,
15852 _("unsupported DW_ATE_UTF bit size: '%d'"),
15854 type
= init_integer_type (objfile
, bits
, 1, name
);
15856 return set_die_type (die
, type
, cu
);
15861 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
15862 dwarf_type_encoding_name (encoding
));
15863 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
15867 if (name
&& strcmp (name
, "char") == 0)
15868 TYPE_NOSIGN (type
) = 1;
15870 return set_die_type (die
, type
, cu
);
15873 /* Parse dwarf attribute if it's a block, reference or constant and put the
15874 resulting value of the attribute into struct bound_prop.
15875 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
15878 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
15879 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
15881 struct dwarf2_property_baton
*baton
;
15882 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
15884 if (attr
== NULL
|| prop
== NULL
)
15887 if (attr_form_is_block (attr
))
15889 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15890 baton
->referenced_type
= NULL
;
15891 baton
->locexpr
.per_cu
= cu
->per_cu
;
15892 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
15893 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
15894 prop
->data
.baton
= baton
;
15895 prop
->kind
= PROP_LOCEXPR
;
15896 gdb_assert (prop
->data
.baton
!= NULL
);
15898 else if (attr_form_is_ref (attr
))
15900 struct dwarf2_cu
*target_cu
= cu
;
15901 struct die_info
*target_die
;
15902 struct attribute
*target_attr
;
15904 target_die
= follow_die_ref (die
, attr
, &target_cu
);
15905 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
15906 if (target_attr
== NULL
)
15907 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
15909 if (target_attr
== NULL
)
15912 switch (target_attr
->name
)
15914 case DW_AT_location
:
15915 if (attr_form_is_section_offset (target_attr
))
15917 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15918 baton
->referenced_type
= die_type (target_die
, target_cu
);
15919 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
15920 prop
->data
.baton
= baton
;
15921 prop
->kind
= PROP_LOCLIST
;
15922 gdb_assert (prop
->data
.baton
!= NULL
);
15924 else if (attr_form_is_block (target_attr
))
15926 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15927 baton
->referenced_type
= die_type (target_die
, target_cu
);
15928 baton
->locexpr
.per_cu
= cu
->per_cu
;
15929 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
15930 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
15931 prop
->data
.baton
= baton
;
15932 prop
->kind
= PROP_LOCEXPR
;
15933 gdb_assert (prop
->data
.baton
!= NULL
);
15937 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15938 "dynamic property");
15942 case DW_AT_data_member_location
:
15946 if (!handle_data_member_location (target_die
, target_cu
,
15950 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15951 baton
->referenced_type
= read_type_die (target_die
->parent
,
15953 baton
->offset_info
.offset
= offset
;
15954 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
15955 prop
->data
.baton
= baton
;
15956 prop
->kind
= PROP_ADDR_OFFSET
;
15961 else if (attr_form_is_constant (attr
))
15963 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
15964 prop
->kind
= PROP_CONST
;
15968 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
15969 dwarf2_name (die
, cu
));
15976 /* Read the given DW_AT_subrange DIE. */
15978 static struct type
*
15979 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15981 struct type
*base_type
, *orig_base_type
;
15982 struct type
*range_type
;
15983 struct attribute
*attr
;
15984 struct dynamic_prop low
, high
;
15985 int low_default_is_valid
;
15986 int high_bound_is_count
= 0;
15988 LONGEST negative_mask
;
15990 orig_base_type
= die_type (die
, cu
);
15991 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
15992 whereas the real type might be. So, we use ORIG_BASE_TYPE when
15993 creating the range type, but we use the result of check_typedef
15994 when examining properties of the type. */
15995 base_type
= check_typedef (orig_base_type
);
15997 /* The die_type call above may have already set the type for this DIE. */
15998 range_type
= get_die_type (die
, cu
);
16002 low
.kind
= PROP_CONST
;
16003 high
.kind
= PROP_CONST
;
16004 high
.data
.const_val
= 0;
16006 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
16007 omitting DW_AT_lower_bound. */
16008 switch (cu
->language
)
16011 case language_cplus
:
16012 low
.data
.const_val
= 0;
16013 low_default_is_valid
= 1;
16015 case language_fortran
:
16016 low
.data
.const_val
= 1;
16017 low_default_is_valid
= 1;
16020 case language_objc
:
16021 case language_rust
:
16022 low
.data
.const_val
= 0;
16023 low_default_is_valid
= (cu
->header
.version
>= 4);
16027 case language_pascal
:
16028 low
.data
.const_val
= 1;
16029 low_default_is_valid
= (cu
->header
.version
>= 4);
16032 low
.data
.const_val
= 0;
16033 low_default_is_valid
= 0;
16037 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
16039 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
16040 else if (!low_default_is_valid
)
16041 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
16042 "- DIE at 0x%x [in module %s]"),
16043 to_underlying (die
->sect_off
), objfile_name (cu
->objfile
));
16045 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
16046 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
16048 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
16049 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
16051 /* If bounds are constant do the final calculation here. */
16052 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
16053 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
16055 high_bound_is_count
= 1;
16059 /* Dwarf-2 specifications explicitly allows to create subrange types
16060 without specifying a base type.
16061 In that case, the base type must be set to the type of
16062 the lower bound, upper bound or count, in that order, if any of these
16063 three attributes references an object that has a type.
16064 If no base type is found, the Dwarf-2 specifications say that
16065 a signed integer type of size equal to the size of an address should
16067 For the following C code: `extern char gdb_int [];'
16068 GCC produces an empty range DIE.
16069 FIXME: muller/2010-05-28: Possible references to object for low bound,
16070 high bound or count are not yet handled by this code. */
16071 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
16073 struct objfile
*objfile
= cu
->objfile
;
16074 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16075 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
16076 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
16078 /* Test "int", "long int", and "long long int" objfile types,
16079 and select the first one having a size above or equal to the
16080 architecture address size. */
16081 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16082 base_type
= int_type
;
16085 int_type
= objfile_type (objfile
)->builtin_long
;
16086 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16087 base_type
= int_type
;
16090 int_type
= objfile_type (objfile
)->builtin_long_long
;
16091 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
16092 base_type
= int_type
;
16097 /* Normally, the DWARF producers are expected to use a signed
16098 constant form (Eg. DW_FORM_sdata) to express negative bounds.
16099 But this is unfortunately not always the case, as witnessed
16100 with GCC, for instance, where the ambiguous DW_FORM_dataN form
16101 is used instead. To work around that ambiguity, we treat
16102 the bounds as signed, and thus sign-extend their values, when
16103 the base type is signed. */
16105 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
16106 if (low
.kind
== PROP_CONST
16107 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
16108 low
.data
.const_val
|= negative_mask
;
16109 if (high
.kind
== PROP_CONST
16110 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
16111 high
.data
.const_val
|= negative_mask
;
16113 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
16115 if (high_bound_is_count
)
16116 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
16118 /* Ada expects an empty array on no boundary attributes. */
16119 if (attr
== NULL
&& cu
->language
!= language_ada
)
16120 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
16122 name
= dwarf2_name (die
, cu
);
16124 TYPE_NAME (range_type
) = name
;
16126 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16128 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
16130 set_die_type (die
, range_type
, cu
);
16132 /* set_die_type should be already done. */
16133 set_descriptive_type (range_type
, die
, cu
);
16138 static struct type
*
16139 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16143 /* For now, we only support the C meaning of an unspecified type: void. */
16145 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
16146 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
16148 return set_die_type (die
, type
, cu
);
16151 /* Read a single die and all its descendents. Set the die's sibling
16152 field to NULL; set other fields in the die correctly, and set all
16153 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
16154 location of the info_ptr after reading all of those dies. PARENT
16155 is the parent of the die in question. */
16157 static struct die_info
*
16158 read_die_and_children (const struct die_reader_specs
*reader
,
16159 const gdb_byte
*info_ptr
,
16160 const gdb_byte
**new_info_ptr
,
16161 struct die_info
*parent
)
16163 struct die_info
*die
;
16164 const gdb_byte
*cur_ptr
;
16167 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
16170 *new_info_ptr
= cur_ptr
;
16173 store_in_ref_table (die
, reader
->cu
);
16176 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
16180 *new_info_ptr
= cur_ptr
;
16183 die
->sibling
= NULL
;
16184 die
->parent
= parent
;
16188 /* Read a die, all of its descendents, and all of its siblings; set
16189 all of the fields of all of the dies correctly. Arguments are as
16190 in read_die_and_children. */
16192 static struct die_info
*
16193 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
16194 const gdb_byte
*info_ptr
,
16195 const gdb_byte
**new_info_ptr
,
16196 struct die_info
*parent
)
16198 struct die_info
*first_die
, *last_sibling
;
16199 const gdb_byte
*cur_ptr
;
16201 cur_ptr
= info_ptr
;
16202 first_die
= last_sibling
= NULL
;
16206 struct die_info
*die
16207 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
16211 *new_info_ptr
= cur_ptr
;
16218 last_sibling
->sibling
= die
;
16220 last_sibling
= die
;
16224 /* Read a die, all of its descendents, and all of its siblings; set
16225 all of the fields of all of the dies correctly. Arguments are as
16226 in read_die_and_children.
16227 This the main entry point for reading a DIE and all its children. */
16229 static struct die_info
*
16230 read_die_and_siblings (const struct die_reader_specs
*reader
,
16231 const gdb_byte
*info_ptr
,
16232 const gdb_byte
**new_info_ptr
,
16233 struct die_info
*parent
)
16235 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
16236 new_info_ptr
, parent
);
16238 if (dwarf_die_debug
)
16240 fprintf_unfiltered (gdb_stdlog
,
16241 "Read die from %s@0x%x of %s:\n",
16242 get_section_name (reader
->die_section
),
16243 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
16244 bfd_get_filename (reader
->abfd
));
16245 dump_die (die
, dwarf_die_debug
);
16251 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
16253 The caller is responsible for filling in the extra attributes
16254 and updating (*DIEP)->num_attrs.
16255 Set DIEP to point to a newly allocated die with its information,
16256 except for its child, sibling, and parent fields.
16257 Set HAS_CHILDREN to tell whether the die has children or not. */
16259 static const gdb_byte
*
16260 read_full_die_1 (const struct die_reader_specs
*reader
,
16261 struct die_info
**diep
, const gdb_byte
*info_ptr
,
16262 int *has_children
, int num_extra_attrs
)
16264 unsigned int abbrev_number
, bytes_read
, i
;
16265 struct abbrev_info
*abbrev
;
16266 struct die_info
*die
;
16267 struct dwarf2_cu
*cu
= reader
->cu
;
16268 bfd
*abfd
= reader
->abfd
;
16270 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
16271 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16272 info_ptr
+= bytes_read
;
16273 if (!abbrev_number
)
16280 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
16282 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
16284 bfd_get_filename (abfd
));
16286 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
16287 die
->sect_off
= sect_off
;
16288 die
->tag
= abbrev
->tag
;
16289 die
->abbrev
= abbrev_number
;
16291 /* Make the result usable.
16292 The caller needs to update num_attrs after adding the extra
16294 die
->num_attrs
= abbrev
->num_attrs
;
16296 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16297 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
16301 *has_children
= abbrev
->has_children
;
16305 /* Read a die and all its attributes.
16306 Set DIEP to point to a newly allocated die with its information,
16307 except for its child, sibling, and parent fields.
16308 Set HAS_CHILDREN to tell whether the die has children or not. */
16310 static const gdb_byte
*
16311 read_full_die (const struct die_reader_specs
*reader
,
16312 struct die_info
**diep
, const gdb_byte
*info_ptr
,
16315 const gdb_byte
*result
;
16317 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
16319 if (dwarf_die_debug
)
16321 fprintf_unfiltered (gdb_stdlog
,
16322 "Read die from %s@0x%x of %s:\n",
16323 get_section_name (reader
->die_section
),
16324 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
16325 bfd_get_filename (reader
->abfd
));
16326 dump_die (*diep
, dwarf_die_debug
);
16332 /* Abbreviation tables.
16334 In DWARF version 2, the description of the debugging information is
16335 stored in a separate .debug_abbrev section. Before we read any
16336 dies from a section we read in all abbreviations and install them
16337 in a hash table. */
16339 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
16341 static struct abbrev_info
*
16342 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
16344 struct abbrev_info
*abbrev
;
16346 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
16347 memset (abbrev
, 0, sizeof (struct abbrev_info
));
16352 /* Add an abbreviation to the table. */
16355 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
16356 unsigned int abbrev_number
,
16357 struct abbrev_info
*abbrev
)
16359 unsigned int hash_number
;
16361 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
16362 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
16363 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
16366 /* Look up an abbrev in the table.
16367 Returns NULL if the abbrev is not found. */
16369 static struct abbrev_info
*
16370 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
16371 unsigned int abbrev_number
)
16373 unsigned int hash_number
;
16374 struct abbrev_info
*abbrev
;
16376 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
16377 abbrev
= abbrev_table
->abbrevs
[hash_number
];
16381 if (abbrev
->number
== abbrev_number
)
16383 abbrev
= abbrev
->next
;
16388 /* Read in an abbrev table. */
16390 static struct abbrev_table
*
16391 abbrev_table_read_table (struct dwarf2_section_info
*section
,
16392 sect_offset sect_off
)
16394 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16395 bfd
*abfd
= get_section_bfd_owner (section
);
16396 struct abbrev_table
*abbrev_table
;
16397 const gdb_byte
*abbrev_ptr
;
16398 struct abbrev_info
*cur_abbrev
;
16399 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
16400 unsigned int abbrev_form
;
16401 struct attr_abbrev
*cur_attrs
;
16402 unsigned int allocated_attrs
;
16404 abbrev_table
= XNEW (struct abbrev_table
);
16405 abbrev_table
->sect_off
= sect_off
;
16406 obstack_init (&abbrev_table
->abbrev_obstack
);
16407 abbrev_table
->abbrevs
=
16408 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
16410 memset (abbrev_table
->abbrevs
, 0,
16411 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
16413 dwarf2_read_section (objfile
, section
);
16414 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
16415 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16416 abbrev_ptr
+= bytes_read
;
16418 allocated_attrs
= ATTR_ALLOC_CHUNK
;
16419 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
16421 /* Loop until we reach an abbrev number of 0. */
16422 while (abbrev_number
)
16424 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
16426 /* read in abbrev header */
16427 cur_abbrev
->number
= abbrev_number
;
16429 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16430 abbrev_ptr
+= bytes_read
;
16431 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
16434 /* now read in declarations */
16437 LONGEST implicit_const
;
16439 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16440 abbrev_ptr
+= bytes_read
;
16441 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16442 abbrev_ptr
+= bytes_read
;
16443 if (abbrev_form
== DW_FORM_implicit_const
)
16445 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
16447 abbrev_ptr
+= bytes_read
;
16451 /* Initialize it due to a false compiler warning. */
16452 implicit_const
= -1;
16455 if (abbrev_name
== 0)
16458 if (cur_abbrev
->num_attrs
== allocated_attrs
)
16460 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
16462 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
16465 cur_attrs
[cur_abbrev
->num_attrs
].name
16466 = (enum dwarf_attribute
) abbrev_name
;
16467 cur_attrs
[cur_abbrev
->num_attrs
].form
16468 = (enum dwarf_form
) abbrev_form
;
16469 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
16470 ++cur_abbrev
->num_attrs
;
16473 cur_abbrev
->attrs
=
16474 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
16475 cur_abbrev
->num_attrs
);
16476 memcpy (cur_abbrev
->attrs
, cur_attrs
,
16477 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
16479 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
16481 /* Get next abbreviation.
16482 Under Irix6 the abbreviations for a compilation unit are not
16483 always properly terminated with an abbrev number of 0.
16484 Exit loop if we encounter an abbreviation which we have
16485 already read (which means we are about to read the abbreviations
16486 for the next compile unit) or if the end of the abbreviation
16487 table is reached. */
16488 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
16490 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
16491 abbrev_ptr
+= bytes_read
;
16492 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
16497 return abbrev_table
;
16500 /* Free the resources held by ABBREV_TABLE. */
16503 abbrev_table_free (struct abbrev_table
*abbrev_table
)
16505 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
16506 xfree (abbrev_table
);
16509 /* Same as abbrev_table_free but as a cleanup.
16510 We pass in a pointer to the pointer to the table so that we can
16511 set the pointer to NULL when we're done. It also simplifies
16512 build_type_psymtabs_1. */
16515 abbrev_table_free_cleanup (void *table_ptr
)
16517 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
16519 if (*abbrev_table_ptr
!= NULL
)
16520 abbrev_table_free (*abbrev_table_ptr
);
16521 *abbrev_table_ptr
= NULL
;
16524 /* Read the abbrev table for CU from ABBREV_SECTION. */
16527 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
16528 struct dwarf2_section_info
*abbrev_section
)
16531 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_sect_off
);
16534 /* Release the memory used by the abbrev table for a compilation unit. */
16537 dwarf2_free_abbrev_table (void *ptr_to_cu
)
16539 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
16541 if (cu
->abbrev_table
!= NULL
)
16542 abbrev_table_free (cu
->abbrev_table
);
16543 /* Set this to NULL so that we SEGV if we try to read it later,
16544 and also because free_comp_unit verifies this is NULL. */
16545 cu
->abbrev_table
= NULL
;
16548 /* Returns nonzero if TAG represents a type that we might generate a partial
16552 is_type_tag_for_partial (int tag
)
16557 /* Some types that would be reasonable to generate partial symbols for,
16558 that we don't at present. */
16559 case DW_TAG_array_type
:
16560 case DW_TAG_file_type
:
16561 case DW_TAG_ptr_to_member_type
:
16562 case DW_TAG_set_type
:
16563 case DW_TAG_string_type
:
16564 case DW_TAG_subroutine_type
:
16566 case DW_TAG_base_type
:
16567 case DW_TAG_class_type
:
16568 case DW_TAG_interface_type
:
16569 case DW_TAG_enumeration_type
:
16570 case DW_TAG_structure_type
:
16571 case DW_TAG_subrange_type
:
16572 case DW_TAG_typedef
:
16573 case DW_TAG_union_type
:
16580 /* Load all DIEs that are interesting for partial symbols into memory. */
16582 static struct partial_die_info
*
16583 load_partial_dies (const struct die_reader_specs
*reader
,
16584 const gdb_byte
*info_ptr
, int building_psymtab
)
16586 struct dwarf2_cu
*cu
= reader
->cu
;
16587 struct objfile
*objfile
= cu
->objfile
;
16588 struct partial_die_info
*part_die
;
16589 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
16590 struct abbrev_info
*abbrev
;
16591 unsigned int bytes_read
;
16592 unsigned int load_all
= 0;
16593 int nesting_level
= 1;
16598 gdb_assert (cu
->per_cu
!= NULL
);
16599 if (cu
->per_cu
->load_all_dies
)
16603 = htab_create_alloc_ex (cu
->header
.length
/ 12,
16607 &cu
->comp_unit_obstack
,
16608 hashtab_obstack_allocate
,
16609 dummy_obstack_deallocate
);
16611 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16615 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
16617 /* A NULL abbrev means the end of a series of children. */
16618 if (abbrev
== NULL
)
16620 if (--nesting_level
== 0)
16622 /* PART_DIE was probably the last thing allocated on the
16623 comp_unit_obstack, so we could call obstack_free
16624 here. We don't do that because the waste is small,
16625 and will be cleaned up when we're done with this
16626 compilation unit. This way, we're also more robust
16627 against other users of the comp_unit_obstack. */
16630 info_ptr
+= bytes_read
;
16631 last_die
= parent_die
;
16632 parent_die
= parent_die
->die_parent
;
16636 /* Check for template arguments. We never save these; if
16637 they're seen, we just mark the parent, and go on our way. */
16638 if (parent_die
!= NULL
16639 && cu
->language
== language_cplus
16640 && (abbrev
->tag
== DW_TAG_template_type_param
16641 || abbrev
->tag
== DW_TAG_template_value_param
))
16643 parent_die
->has_template_arguments
= 1;
16647 /* We don't need a partial DIE for the template argument. */
16648 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16653 /* We only recurse into c++ subprograms looking for template arguments.
16654 Skip their other children. */
16656 && cu
->language
== language_cplus
16657 && parent_die
!= NULL
16658 && parent_die
->tag
== DW_TAG_subprogram
)
16660 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16664 /* Check whether this DIE is interesting enough to save. Normally
16665 we would not be interested in members here, but there may be
16666 later variables referencing them via DW_AT_specification (for
16667 static members). */
16669 && !is_type_tag_for_partial (abbrev
->tag
)
16670 && abbrev
->tag
!= DW_TAG_constant
16671 && abbrev
->tag
!= DW_TAG_enumerator
16672 && abbrev
->tag
!= DW_TAG_subprogram
16673 && abbrev
->tag
!= DW_TAG_lexical_block
16674 && abbrev
->tag
!= DW_TAG_variable
16675 && abbrev
->tag
!= DW_TAG_namespace
16676 && abbrev
->tag
!= DW_TAG_module
16677 && abbrev
->tag
!= DW_TAG_member
16678 && abbrev
->tag
!= DW_TAG_imported_unit
16679 && abbrev
->tag
!= DW_TAG_imported_declaration
)
16681 /* Otherwise we skip to the next sibling, if any. */
16682 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16686 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
16689 /* This two-pass algorithm for processing partial symbols has a
16690 high cost in cache pressure. Thus, handle some simple cases
16691 here which cover the majority of C partial symbols. DIEs
16692 which neither have specification tags in them, nor could have
16693 specification tags elsewhere pointing at them, can simply be
16694 processed and discarded.
16696 This segment is also optional; scan_partial_symbols and
16697 add_partial_symbol will handle these DIEs if we chain
16698 them in normally. When compilers which do not emit large
16699 quantities of duplicate debug information are more common,
16700 this code can probably be removed. */
16702 /* Any complete simple types at the top level (pretty much all
16703 of them, for a language without namespaces), can be processed
16705 if (parent_die
== NULL
16706 && part_die
->has_specification
== 0
16707 && part_die
->is_declaration
== 0
16708 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
16709 || part_die
->tag
== DW_TAG_base_type
16710 || part_die
->tag
== DW_TAG_subrange_type
))
16712 if (building_psymtab
&& part_die
->name
!= NULL
)
16713 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16714 VAR_DOMAIN
, LOC_TYPEDEF
,
16715 &objfile
->static_psymbols
,
16716 0, cu
->language
, objfile
);
16717 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16721 /* The exception for DW_TAG_typedef with has_children above is
16722 a workaround of GCC PR debug/47510. In the case of this complaint
16723 type_name_no_tag_or_error will error on such types later.
16725 GDB skipped children of DW_TAG_typedef by the shortcut above and then
16726 it could not find the child DIEs referenced later, this is checked
16727 above. In correct DWARF DW_TAG_typedef should have no children. */
16729 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
16730 complaint (&symfile_complaints
,
16731 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
16732 "- DIE at 0x%x [in module %s]"),
16733 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
16735 /* If we're at the second level, and we're an enumerator, and
16736 our parent has no specification (meaning possibly lives in a
16737 namespace elsewhere), then we can add the partial symbol now
16738 instead of queueing it. */
16739 if (part_die
->tag
== DW_TAG_enumerator
16740 && parent_die
!= NULL
16741 && parent_die
->die_parent
== NULL
16742 && parent_die
->tag
== DW_TAG_enumeration_type
16743 && parent_die
->has_specification
== 0)
16745 if (part_die
->name
== NULL
)
16746 complaint (&symfile_complaints
,
16747 _("malformed enumerator DIE ignored"));
16748 else if (building_psymtab
)
16749 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16750 VAR_DOMAIN
, LOC_CONST
,
16751 cu
->language
== language_cplus
16752 ? &objfile
->global_psymbols
16753 : &objfile
->static_psymbols
,
16754 0, cu
->language
, objfile
);
16756 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16760 /* We'll save this DIE so link it in. */
16761 part_die
->die_parent
= parent_die
;
16762 part_die
->die_sibling
= NULL
;
16763 part_die
->die_child
= NULL
;
16765 if (last_die
&& last_die
== parent_die
)
16766 last_die
->die_child
= part_die
;
16768 last_die
->die_sibling
= part_die
;
16770 last_die
= part_die
;
16772 if (first_die
== NULL
)
16773 first_die
= part_die
;
16775 /* Maybe add the DIE to the hash table. Not all DIEs that we
16776 find interesting need to be in the hash table, because we
16777 also have the parent/sibling/child chains; only those that we
16778 might refer to by offset later during partial symbol reading.
16780 For now this means things that might have be the target of a
16781 DW_AT_specification, DW_AT_abstract_origin, or
16782 DW_AT_extension. DW_AT_extension will refer only to
16783 namespaces; DW_AT_abstract_origin refers to functions (and
16784 many things under the function DIE, but we do not recurse
16785 into function DIEs during partial symbol reading) and
16786 possibly variables as well; DW_AT_specification refers to
16787 declarations. Declarations ought to have the DW_AT_declaration
16788 flag. It happens that GCC forgets to put it in sometimes, but
16789 only for functions, not for types.
16791 Adding more things than necessary to the hash table is harmless
16792 except for the performance cost. Adding too few will result in
16793 wasted time in find_partial_die, when we reread the compilation
16794 unit with load_all_dies set. */
16797 || abbrev
->tag
== DW_TAG_constant
16798 || abbrev
->tag
== DW_TAG_subprogram
16799 || abbrev
->tag
== DW_TAG_variable
16800 || abbrev
->tag
== DW_TAG_namespace
16801 || part_die
->is_declaration
)
16805 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
16806 to_underlying (part_die
->sect_off
),
16811 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16813 /* For some DIEs we want to follow their children (if any). For C
16814 we have no reason to follow the children of structures; for other
16815 languages we have to, so that we can get at method physnames
16816 to infer fully qualified class names, for DW_AT_specification,
16817 and for C++ template arguments. For C++, we also look one level
16818 inside functions to find template arguments (if the name of the
16819 function does not already contain the template arguments).
16821 For Ada, we need to scan the children of subprograms and lexical
16822 blocks as well because Ada allows the definition of nested
16823 entities that could be interesting for the debugger, such as
16824 nested subprograms for instance. */
16825 if (last_die
->has_children
16827 || last_die
->tag
== DW_TAG_namespace
16828 || last_die
->tag
== DW_TAG_module
16829 || last_die
->tag
== DW_TAG_enumeration_type
16830 || (cu
->language
== language_cplus
16831 && last_die
->tag
== DW_TAG_subprogram
16832 && (last_die
->name
== NULL
16833 || strchr (last_die
->name
, '<') == NULL
))
16834 || (cu
->language
!= language_c
16835 && (last_die
->tag
== DW_TAG_class_type
16836 || last_die
->tag
== DW_TAG_interface_type
16837 || last_die
->tag
== DW_TAG_structure_type
16838 || last_die
->tag
== DW_TAG_union_type
))
16839 || (cu
->language
== language_ada
16840 && (last_die
->tag
== DW_TAG_subprogram
16841 || last_die
->tag
== DW_TAG_lexical_block
))))
16844 parent_die
= last_die
;
16848 /* Otherwise we skip to the next sibling, if any. */
16849 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
16851 /* Back to the top, do it again. */
16855 /* Read a minimal amount of information into the minimal die structure. */
16857 static const gdb_byte
*
16858 read_partial_die (const struct die_reader_specs
*reader
,
16859 struct partial_die_info
*part_die
,
16860 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
16861 const gdb_byte
*info_ptr
)
16863 struct dwarf2_cu
*cu
= reader
->cu
;
16864 struct objfile
*objfile
= cu
->objfile
;
16865 const gdb_byte
*buffer
= reader
->buffer
;
16867 struct attribute attr
;
16868 int has_low_pc_attr
= 0;
16869 int has_high_pc_attr
= 0;
16870 int high_pc_relative
= 0;
16872 memset (part_die
, 0, sizeof (struct partial_die_info
));
16874 part_die
->sect_off
= (sect_offset
) (info_ptr
- buffer
);
16876 info_ptr
+= abbrev_len
;
16878 if (abbrev
== NULL
)
16881 part_die
->tag
= abbrev
->tag
;
16882 part_die
->has_children
= abbrev
->has_children
;
16884 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16886 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
16888 /* Store the data if it is of an attribute we want to keep in a
16889 partial symbol table. */
16893 switch (part_die
->tag
)
16895 case DW_TAG_compile_unit
:
16896 case DW_TAG_partial_unit
:
16897 case DW_TAG_type_unit
:
16898 /* Compilation units have a DW_AT_name that is a filename, not
16899 a source language identifier. */
16900 case DW_TAG_enumeration_type
:
16901 case DW_TAG_enumerator
:
16902 /* These tags always have simple identifiers already; no need
16903 to canonicalize them. */
16904 part_die
->name
= DW_STRING (&attr
);
16908 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
16909 &objfile
->per_bfd
->storage_obstack
);
16913 case DW_AT_linkage_name
:
16914 case DW_AT_MIPS_linkage_name
:
16915 /* Note that both forms of linkage name might appear. We
16916 assume they will be the same, and we only store the last
16918 if (cu
->language
== language_ada
)
16919 part_die
->name
= DW_STRING (&attr
);
16920 part_die
->linkage_name
= DW_STRING (&attr
);
16923 has_low_pc_attr
= 1;
16924 part_die
->lowpc
= attr_value_as_address (&attr
);
16926 case DW_AT_high_pc
:
16927 has_high_pc_attr
= 1;
16928 part_die
->highpc
= attr_value_as_address (&attr
);
16929 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
16930 high_pc_relative
= 1;
16932 case DW_AT_location
:
16933 /* Support the .debug_loc offsets. */
16934 if (attr_form_is_block (&attr
))
16936 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
16938 else if (attr_form_is_section_offset (&attr
))
16940 dwarf2_complex_location_expr_complaint ();
16944 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16945 "partial symbol information");
16948 case DW_AT_external
:
16949 part_die
->is_external
= DW_UNSND (&attr
);
16951 case DW_AT_declaration
:
16952 part_die
->is_declaration
= DW_UNSND (&attr
);
16955 part_die
->has_type
= 1;
16957 case DW_AT_abstract_origin
:
16958 case DW_AT_specification
:
16959 case DW_AT_extension
:
16960 part_die
->has_specification
= 1;
16961 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
16962 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16963 || cu
->per_cu
->is_dwz
);
16965 case DW_AT_sibling
:
16966 /* Ignore absolute siblings, they might point outside of
16967 the current compile unit. */
16968 if (attr
.form
== DW_FORM_ref_addr
)
16969 complaint (&symfile_complaints
,
16970 _("ignoring absolute DW_AT_sibling"));
16973 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
16974 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
16976 if (sibling_ptr
< info_ptr
)
16977 complaint (&symfile_complaints
,
16978 _("DW_AT_sibling points backwards"));
16979 else if (sibling_ptr
> reader
->buffer_end
)
16980 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
16982 part_die
->sibling
= sibling_ptr
;
16985 case DW_AT_byte_size
:
16986 part_die
->has_byte_size
= 1;
16988 case DW_AT_const_value
:
16989 part_die
->has_const_value
= 1;
16991 case DW_AT_calling_convention
:
16992 /* DWARF doesn't provide a way to identify a program's source-level
16993 entry point. DW_AT_calling_convention attributes are only meant
16994 to describe functions' calling conventions.
16996 However, because it's a necessary piece of information in
16997 Fortran, and before DWARF 4 DW_CC_program was the only
16998 piece of debugging information whose definition refers to
16999 a 'main program' at all, several compilers marked Fortran
17000 main programs with DW_CC_program --- even when those
17001 functions use the standard calling conventions.
17003 Although DWARF now specifies a way to provide this
17004 information, we support this practice for backward
17006 if (DW_UNSND (&attr
) == DW_CC_program
17007 && cu
->language
== language_fortran
)
17008 part_die
->main_subprogram
= 1;
17011 if (DW_UNSND (&attr
) == DW_INL_inlined
17012 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
17013 part_die
->may_be_inlined
= 1;
17017 if (part_die
->tag
== DW_TAG_imported_unit
)
17019 part_die
->d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
17020 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
17021 || cu
->per_cu
->is_dwz
);
17025 case DW_AT_main_subprogram
:
17026 part_die
->main_subprogram
= DW_UNSND (&attr
);
17034 if (high_pc_relative
)
17035 part_die
->highpc
+= part_die
->lowpc
;
17037 if (has_low_pc_attr
&& has_high_pc_attr
)
17039 /* When using the GNU linker, .gnu.linkonce. sections are used to
17040 eliminate duplicate copies of functions and vtables and such.
17041 The linker will arbitrarily choose one and discard the others.
17042 The AT_*_pc values for such functions refer to local labels in
17043 these sections. If the section from that file was discarded, the
17044 labels are not in the output, so the relocs get a value of 0.
17045 If this is a discarded function, mark the pc bounds as invalid,
17046 so that GDB will ignore it. */
17047 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
17049 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17051 complaint (&symfile_complaints
,
17052 _("DW_AT_low_pc %s is zero "
17053 "for DIE at 0x%x [in module %s]"),
17054 paddress (gdbarch
, part_die
->lowpc
),
17055 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
17057 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
17058 else if (part_die
->lowpc
>= part_die
->highpc
)
17060 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17062 complaint (&symfile_complaints
,
17063 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
17064 "for DIE at 0x%x [in module %s]"),
17065 paddress (gdbarch
, part_die
->lowpc
),
17066 paddress (gdbarch
, part_die
->highpc
),
17067 to_underlying (part_die
->sect_off
),
17068 objfile_name (objfile
));
17071 part_die
->has_pc_info
= 1;
17077 /* Find a cached partial DIE at OFFSET in CU. */
17079 static struct partial_die_info
*
17080 find_partial_die_in_comp_unit (sect_offset sect_off
, struct dwarf2_cu
*cu
)
17082 struct partial_die_info
*lookup_die
= NULL
;
17083 struct partial_die_info part_die
;
17085 part_die
.sect_off
= sect_off
;
17086 lookup_die
= ((struct partial_die_info
*)
17087 htab_find_with_hash (cu
->partial_dies
, &part_die
,
17088 to_underlying (sect_off
)));
17093 /* Find a partial DIE at OFFSET, which may or may not be in CU,
17094 except in the case of .debug_types DIEs which do not reference
17095 outside their CU (they do however referencing other types via
17096 DW_FORM_ref_sig8). */
17098 static struct partial_die_info
*
17099 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
17101 struct objfile
*objfile
= cu
->objfile
;
17102 struct dwarf2_per_cu_data
*per_cu
= NULL
;
17103 struct partial_die_info
*pd
= NULL
;
17105 if (offset_in_dwz
== cu
->per_cu
->is_dwz
17106 && offset_in_cu_p (&cu
->header
, sect_off
))
17108 pd
= find_partial_die_in_comp_unit (sect_off
, cu
);
17111 /* We missed recording what we needed.
17112 Load all dies and try again. */
17113 per_cu
= cu
->per_cu
;
17117 /* TUs don't reference other CUs/TUs (except via type signatures). */
17118 if (cu
->per_cu
->is_debug_types
)
17120 error (_("Dwarf Error: Type Unit at offset 0x%x contains"
17121 " external reference to offset 0x%x [in module %s].\n"),
17122 to_underlying (cu
->header
.sect_off
), to_underlying (sect_off
),
17123 bfd_get_filename (objfile
->obfd
));
17125 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
17128 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
17129 load_partial_comp_unit (per_cu
);
17131 per_cu
->cu
->last_used
= 0;
17132 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
17135 /* If we didn't find it, and not all dies have been loaded,
17136 load them all and try again. */
17138 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
17140 per_cu
->load_all_dies
= 1;
17142 /* This is nasty. When we reread the DIEs, somewhere up the call chain
17143 THIS_CU->cu may already be in use. So we can't just free it and
17144 replace its DIEs with the ones we read in. Instead, we leave those
17145 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
17146 and clobber THIS_CU->cu->partial_dies with the hash table for the new
17148 load_partial_comp_unit (per_cu
);
17150 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
17154 internal_error (__FILE__
, __LINE__
,
17155 _("could not find partial DIE 0x%x "
17156 "in cache [from module %s]\n"),
17157 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
17161 /* See if we can figure out if the class lives in a namespace. We do
17162 this by looking for a member function; its demangled name will
17163 contain namespace info, if there is any. */
17166 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
17167 struct dwarf2_cu
*cu
)
17169 /* NOTE: carlton/2003-10-07: Getting the info this way changes
17170 what template types look like, because the demangler
17171 frequently doesn't give the same name as the debug info. We
17172 could fix this by only using the demangled name to get the
17173 prefix (but see comment in read_structure_type). */
17175 struct partial_die_info
*real_pdi
;
17176 struct partial_die_info
*child_pdi
;
17178 /* If this DIE (this DIE's specification, if any) has a parent, then
17179 we should not do this. We'll prepend the parent's fully qualified
17180 name when we create the partial symbol. */
17182 real_pdi
= struct_pdi
;
17183 while (real_pdi
->has_specification
)
17184 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
17185 real_pdi
->spec_is_dwz
, cu
);
17187 if (real_pdi
->die_parent
!= NULL
)
17190 for (child_pdi
= struct_pdi
->die_child
;
17192 child_pdi
= child_pdi
->die_sibling
)
17194 if (child_pdi
->tag
== DW_TAG_subprogram
17195 && child_pdi
->linkage_name
!= NULL
)
17197 char *actual_class_name
17198 = language_class_name_from_physname (cu
->language_defn
,
17199 child_pdi
->linkage_name
);
17200 if (actual_class_name
!= NULL
)
17204 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
17206 strlen (actual_class_name
)));
17207 xfree (actual_class_name
);
17214 /* Adjust PART_DIE before generating a symbol for it. This function
17215 may set the is_external flag or change the DIE's name. */
17218 fixup_partial_die (struct partial_die_info
*part_die
,
17219 struct dwarf2_cu
*cu
)
17221 /* Once we've fixed up a die, there's no point in doing so again.
17222 This also avoids a memory leak if we were to call
17223 guess_partial_die_structure_name multiple times. */
17224 if (part_die
->fixup_called
)
17227 /* If we found a reference attribute and the DIE has no name, try
17228 to find a name in the referred to DIE. */
17230 if (part_die
->name
== NULL
&& part_die
->has_specification
)
17232 struct partial_die_info
*spec_die
;
17234 spec_die
= find_partial_die (part_die
->spec_offset
,
17235 part_die
->spec_is_dwz
, cu
);
17237 fixup_partial_die (spec_die
, cu
);
17239 if (spec_die
->name
)
17241 part_die
->name
= spec_die
->name
;
17243 /* Copy DW_AT_external attribute if it is set. */
17244 if (spec_die
->is_external
)
17245 part_die
->is_external
= spec_die
->is_external
;
17249 /* Set default names for some unnamed DIEs. */
17251 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
17252 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
17254 /* If there is no parent die to provide a namespace, and there are
17255 children, see if we can determine the namespace from their linkage
17257 if (cu
->language
== language_cplus
17258 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
17259 && part_die
->die_parent
== NULL
17260 && part_die
->has_children
17261 && (part_die
->tag
== DW_TAG_class_type
17262 || part_die
->tag
== DW_TAG_structure_type
17263 || part_die
->tag
== DW_TAG_union_type
))
17264 guess_partial_die_structure_name (part_die
, cu
);
17266 /* GCC might emit a nameless struct or union that has a linkage
17267 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
17268 if (part_die
->name
== NULL
17269 && (part_die
->tag
== DW_TAG_class_type
17270 || part_die
->tag
== DW_TAG_interface_type
17271 || part_die
->tag
== DW_TAG_structure_type
17272 || part_die
->tag
== DW_TAG_union_type
)
17273 && part_die
->linkage_name
!= NULL
)
17277 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
17282 /* Strip any leading namespaces/classes, keep only the base name.
17283 DW_AT_name for named DIEs does not contain the prefixes. */
17284 base
= strrchr (demangled
, ':');
17285 if (base
&& base
> demangled
&& base
[-1] == ':')
17292 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
17293 base
, strlen (base
)));
17298 part_die
->fixup_called
= 1;
17301 /* Read an attribute value described by an attribute form. */
17303 static const gdb_byte
*
17304 read_attribute_value (const struct die_reader_specs
*reader
,
17305 struct attribute
*attr
, unsigned form
,
17306 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
17308 struct dwarf2_cu
*cu
= reader
->cu
;
17309 struct objfile
*objfile
= cu
->objfile
;
17310 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17311 bfd
*abfd
= reader
->abfd
;
17312 struct comp_unit_head
*cu_header
= &cu
->header
;
17313 unsigned int bytes_read
;
17314 struct dwarf_block
*blk
;
17316 attr
->form
= (enum dwarf_form
) form
;
17319 case DW_FORM_ref_addr
:
17320 if (cu
->header
.version
== 2)
17321 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
17323 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
17324 &cu
->header
, &bytes_read
);
17325 info_ptr
+= bytes_read
;
17327 case DW_FORM_GNU_ref_alt
:
17328 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
17329 info_ptr
+= bytes_read
;
17332 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
17333 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
17334 info_ptr
+= bytes_read
;
17336 case DW_FORM_block2
:
17337 blk
= dwarf_alloc_block (cu
);
17338 blk
->size
= read_2_bytes (abfd
, info_ptr
);
17340 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17341 info_ptr
+= blk
->size
;
17342 DW_BLOCK (attr
) = blk
;
17344 case DW_FORM_block4
:
17345 blk
= dwarf_alloc_block (cu
);
17346 blk
->size
= read_4_bytes (abfd
, info_ptr
);
17348 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17349 info_ptr
+= blk
->size
;
17350 DW_BLOCK (attr
) = blk
;
17352 case DW_FORM_data2
:
17353 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
17356 case DW_FORM_data4
:
17357 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
17360 case DW_FORM_data8
:
17361 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
17364 case DW_FORM_data16
:
17365 blk
= dwarf_alloc_block (cu
);
17367 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
17369 DW_BLOCK (attr
) = blk
;
17371 case DW_FORM_sec_offset
:
17372 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
17373 info_ptr
+= bytes_read
;
17375 case DW_FORM_string
:
17376 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
17377 DW_STRING_IS_CANONICAL (attr
) = 0;
17378 info_ptr
+= bytes_read
;
17381 if (!cu
->per_cu
->is_dwz
)
17383 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
17385 DW_STRING_IS_CANONICAL (attr
) = 0;
17386 info_ptr
+= bytes_read
;
17390 case DW_FORM_line_strp
:
17391 if (!cu
->per_cu
->is_dwz
)
17393 DW_STRING (attr
) = read_indirect_line_string (abfd
, info_ptr
,
17394 cu_header
, &bytes_read
);
17395 DW_STRING_IS_CANONICAL (attr
) = 0;
17396 info_ptr
+= bytes_read
;
17400 case DW_FORM_GNU_strp_alt
:
17402 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17403 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
17406 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
17407 DW_STRING_IS_CANONICAL (attr
) = 0;
17408 info_ptr
+= bytes_read
;
17411 case DW_FORM_exprloc
:
17412 case DW_FORM_block
:
17413 blk
= dwarf_alloc_block (cu
);
17414 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17415 info_ptr
+= bytes_read
;
17416 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17417 info_ptr
+= blk
->size
;
17418 DW_BLOCK (attr
) = blk
;
17420 case DW_FORM_block1
:
17421 blk
= dwarf_alloc_block (cu
);
17422 blk
->size
= read_1_byte (abfd
, info_ptr
);
17424 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
17425 info_ptr
+= blk
->size
;
17426 DW_BLOCK (attr
) = blk
;
17428 case DW_FORM_data1
:
17429 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
17433 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
17436 case DW_FORM_flag_present
:
17437 DW_UNSND (attr
) = 1;
17439 case DW_FORM_sdata
:
17440 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
17441 info_ptr
+= bytes_read
;
17443 case DW_FORM_udata
:
17444 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17445 info_ptr
+= bytes_read
;
17448 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17449 + read_1_byte (abfd
, info_ptr
));
17453 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17454 + read_2_bytes (abfd
, info_ptr
));
17458 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17459 + read_4_bytes (abfd
, info_ptr
));
17463 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17464 + read_8_bytes (abfd
, info_ptr
));
17467 case DW_FORM_ref_sig8
:
17468 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
17471 case DW_FORM_ref_udata
:
17472 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
17473 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
17474 info_ptr
+= bytes_read
;
17476 case DW_FORM_indirect
:
17477 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17478 info_ptr
+= bytes_read
;
17479 if (form
== DW_FORM_implicit_const
)
17481 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
17482 info_ptr
+= bytes_read
;
17484 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
17487 case DW_FORM_implicit_const
:
17488 DW_SND (attr
) = implicit_const
;
17490 case DW_FORM_GNU_addr_index
:
17491 if (reader
->dwo_file
== NULL
)
17493 /* For now flag a hard error.
17494 Later we can turn this into a complaint. */
17495 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
17496 dwarf_form_name (form
),
17497 bfd_get_filename (abfd
));
17499 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
17500 info_ptr
+= bytes_read
;
17502 case DW_FORM_GNU_str_index
:
17503 if (reader
->dwo_file
== NULL
)
17505 /* For now flag a hard error.
17506 Later we can turn this into a complaint if warranted. */
17507 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
17508 dwarf_form_name (form
),
17509 bfd_get_filename (abfd
));
17512 ULONGEST str_index
=
17513 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17515 DW_STRING (attr
) = read_str_index (reader
, str_index
);
17516 DW_STRING_IS_CANONICAL (attr
) = 0;
17517 info_ptr
+= bytes_read
;
17521 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
17522 dwarf_form_name (form
),
17523 bfd_get_filename (abfd
));
17527 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
17528 attr
->form
= DW_FORM_GNU_ref_alt
;
17530 /* We have seen instances where the compiler tried to emit a byte
17531 size attribute of -1 which ended up being encoded as an unsigned
17532 0xffffffff. Although 0xffffffff is technically a valid size value,
17533 an object of this size seems pretty unlikely so we can relatively
17534 safely treat these cases as if the size attribute was invalid and
17535 treat them as zero by default. */
17536 if (attr
->name
== DW_AT_byte_size
17537 && form
== DW_FORM_data4
17538 && DW_UNSND (attr
) >= 0xffffffff)
17541 (&symfile_complaints
,
17542 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
17543 hex_string (DW_UNSND (attr
)));
17544 DW_UNSND (attr
) = 0;
17550 /* Read an attribute described by an abbreviated attribute. */
17552 static const gdb_byte
*
17553 read_attribute (const struct die_reader_specs
*reader
,
17554 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
17555 const gdb_byte
*info_ptr
)
17557 attr
->name
= abbrev
->name
;
17558 return read_attribute_value (reader
, attr
, abbrev
->form
,
17559 abbrev
->implicit_const
, info_ptr
);
17562 /* Read dwarf information from a buffer. */
17564 static unsigned int
17565 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
17567 return bfd_get_8 (abfd
, buf
);
17571 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
17573 return bfd_get_signed_8 (abfd
, buf
);
17576 static unsigned int
17577 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17579 return bfd_get_16 (abfd
, buf
);
17583 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17585 return bfd_get_signed_16 (abfd
, buf
);
17588 static unsigned int
17589 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17591 return bfd_get_32 (abfd
, buf
);
17595 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17597 return bfd_get_signed_32 (abfd
, buf
);
17601 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17603 return bfd_get_64 (abfd
, buf
);
17607 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
17608 unsigned int *bytes_read
)
17610 struct comp_unit_head
*cu_header
= &cu
->header
;
17611 CORE_ADDR retval
= 0;
17613 if (cu_header
->signed_addr_p
)
17615 switch (cu_header
->addr_size
)
17618 retval
= bfd_get_signed_16 (abfd
, buf
);
17621 retval
= bfd_get_signed_32 (abfd
, buf
);
17624 retval
= bfd_get_signed_64 (abfd
, buf
);
17627 internal_error (__FILE__
, __LINE__
,
17628 _("read_address: bad switch, signed [in module %s]"),
17629 bfd_get_filename (abfd
));
17634 switch (cu_header
->addr_size
)
17637 retval
= bfd_get_16 (abfd
, buf
);
17640 retval
= bfd_get_32 (abfd
, buf
);
17643 retval
= bfd_get_64 (abfd
, buf
);
17646 internal_error (__FILE__
, __LINE__
,
17647 _("read_address: bad switch, "
17648 "unsigned [in module %s]"),
17649 bfd_get_filename (abfd
));
17653 *bytes_read
= cu_header
->addr_size
;
17657 /* Read the initial length from a section. The (draft) DWARF 3
17658 specification allows the initial length to take up either 4 bytes
17659 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
17660 bytes describe the length and all offsets will be 8 bytes in length
17663 An older, non-standard 64-bit format is also handled by this
17664 function. The older format in question stores the initial length
17665 as an 8-byte quantity without an escape value. Lengths greater
17666 than 2^32 aren't very common which means that the initial 4 bytes
17667 is almost always zero. Since a length value of zero doesn't make
17668 sense for the 32-bit format, this initial zero can be considered to
17669 be an escape value which indicates the presence of the older 64-bit
17670 format. As written, the code can't detect (old format) lengths
17671 greater than 4GB. If it becomes necessary to handle lengths
17672 somewhat larger than 4GB, we could allow other small values (such
17673 as the non-sensical values of 1, 2, and 3) to also be used as
17674 escape values indicating the presence of the old format.
17676 The value returned via bytes_read should be used to increment the
17677 relevant pointer after calling read_initial_length().
17679 [ Note: read_initial_length() and read_offset() are based on the
17680 document entitled "DWARF Debugging Information Format", revision
17681 3, draft 8, dated November 19, 2001. This document was obtained
17684 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
17686 This document is only a draft and is subject to change. (So beware.)
17688 Details regarding the older, non-standard 64-bit format were
17689 determined empirically by examining 64-bit ELF files produced by
17690 the SGI toolchain on an IRIX 6.5 machine.
17692 - Kevin, July 16, 2002
17696 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
17698 LONGEST length
= bfd_get_32 (abfd
, buf
);
17700 if (length
== 0xffffffff)
17702 length
= bfd_get_64 (abfd
, buf
+ 4);
17705 else if (length
== 0)
17707 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
17708 length
= bfd_get_64 (abfd
, buf
);
17719 /* Cover function for read_initial_length.
17720 Returns the length of the object at BUF, and stores the size of the
17721 initial length in *BYTES_READ and stores the size that offsets will be in
17723 If the initial length size is not equivalent to that specified in
17724 CU_HEADER then issue a complaint.
17725 This is useful when reading non-comp-unit headers. */
17728 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
17729 const struct comp_unit_head
*cu_header
,
17730 unsigned int *bytes_read
,
17731 unsigned int *offset_size
)
17733 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
17735 gdb_assert (cu_header
->initial_length_size
== 4
17736 || cu_header
->initial_length_size
== 8
17737 || cu_header
->initial_length_size
== 12);
17739 if (cu_header
->initial_length_size
!= *bytes_read
)
17740 complaint (&symfile_complaints
,
17741 _("intermixed 32-bit and 64-bit DWARF sections"));
17743 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
17747 /* Read an offset from the data stream. The size of the offset is
17748 given by cu_header->offset_size. */
17751 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
17752 const struct comp_unit_head
*cu_header
,
17753 unsigned int *bytes_read
)
17755 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
17757 *bytes_read
= cu_header
->offset_size
;
17761 /* Read an offset from the data stream. */
17764 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
17766 LONGEST retval
= 0;
17768 switch (offset_size
)
17771 retval
= bfd_get_32 (abfd
, buf
);
17774 retval
= bfd_get_64 (abfd
, buf
);
17777 internal_error (__FILE__
, __LINE__
,
17778 _("read_offset_1: bad switch [in module %s]"),
17779 bfd_get_filename (abfd
));
17785 static const gdb_byte
*
17786 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
17788 /* If the size of a host char is 8 bits, we can return a pointer
17789 to the buffer, otherwise we have to copy the data to a buffer
17790 allocated on the temporary obstack. */
17791 gdb_assert (HOST_CHAR_BIT
== 8);
17795 static const char *
17796 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
17797 unsigned int *bytes_read_ptr
)
17799 /* If the size of a host char is 8 bits, we can return a pointer
17800 to the string, otherwise we have to copy the string to a buffer
17801 allocated on the temporary obstack. */
17802 gdb_assert (HOST_CHAR_BIT
== 8);
17805 *bytes_read_ptr
= 1;
17808 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
17809 return (const char *) buf
;
17812 /* Return pointer to string at section SECT offset STR_OFFSET with error
17813 reporting strings FORM_NAME and SECT_NAME. */
17815 static const char *
17816 read_indirect_string_at_offset_from (bfd
*abfd
, LONGEST str_offset
,
17817 struct dwarf2_section_info
*sect
,
17818 const char *form_name
,
17819 const char *sect_name
)
17821 dwarf2_read_section (dwarf2_per_objfile
->objfile
, sect
);
17822 if (sect
->buffer
== NULL
)
17823 error (_("%s used without %s section [in module %s]"),
17824 form_name
, sect_name
, bfd_get_filename (abfd
));
17825 if (str_offset
>= sect
->size
)
17826 error (_("%s pointing outside of %s section [in module %s]"),
17827 form_name
, sect_name
, bfd_get_filename (abfd
));
17828 gdb_assert (HOST_CHAR_BIT
== 8);
17829 if (sect
->buffer
[str_offset
] == '\0')
17831 return (const char *) (sect
->buffer
+ str_offset
);
17834 /* Return pointer to string at .debug_str offset STR_OFFSET. */
17836 static const char *
17837 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17839 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17840 &dwarf2_per_objfile
->str
,
17841 "DW_FORM_strp", ".debug_str");
17844 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
17846 static const char *
17847 read_indirect_line_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17849 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17850 &dwarf2_per_objfile
->line_str
,
17851 "DW_FORM_line_strp",
17852 ".debug_line_str");
17855 /* Read a string at offset STR_OFFSET in the .debug_str section from
17856 the .dwz file DWZ. Throw an error if the offset is too large. If
17857 the string consists of a single NUL byte, return NULL; otherwise
17858 return a pointer to the string. */
17860 static const char *
17861 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
17863 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
17865 if (dwz
->str
.buffer
== NULL
)
17866 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
17867 "section [in module %s]"),
17868 bfd_get_filename (dwz
->dwz_bfd
));
17869 if (str_offset
>= dwz
->str
.size
)
17870 error (_("DW_FORM_GNU_strp_alt pointing outside of "
17871 ".debug_str section [in module %s]"),
17872 bfd_get_filename (dwz
->dwz_bfd
));
17873 gdb_assert (HOST_CHAR_BIT
== 8);
17874 if (dwz
->str
.buffer
[str_offset
] == '\0')
17876 return (const char *) (dwz
->str
.buffer
+ str_offset
);
17879 /* Return pointer to string at .debug_str offset as read from BUF.
17880 BUF is assumed to be in a compilation unit described by CU_HEADER.
17881 Return *BYTES_READ_PTR count of bytes read from BUF. */
17883 static const char *
17884 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
17885 const struct comp_unit_head
*cu_header
,
17886 unsigned int *bytes_read_ptr
)
17888 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17890 return read_indirect_string_at_offset (abfd
, str_offset
);
17893 /* Return pointer to string at .debug_line_str offset as read from BUF.
17894 BUF is assumed to be in a compilation unit described by CU_HEADER.
17895 Return *BYTES_READ_PTR count of bytes read from BUF. */
17897 static const char *
17898 read_indirect_line_string (bfd
*abfd
, const gdb_byte
*buf
,
17899 const struct comp_unit_head
*cu_header
,
17900 unsigned int *bytes_read_ptr
)
17902 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17904 return read_indirect_line_string_at_offset (abfd
, str_offset
);
17908 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17909 unsigned int *bytes_read_ptr
)
17912 unsigned int num_read
;
17914 unsigned char byte
;
17921 byte
= bfd_get_8 (abfd
, buf
);
17924 result
|= ((ULONGEST
) (byte
& 127) << shift
);
17925 if ((byte
& 128) == 0)
17931 *bytes_read_ptr
= num_read
;
17936 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17937 unsigned int *bytes_read_ptr
)
17940 int shift
, num_read
;
17941 unsigned char byte
;
17948 byte
= bfd_get_8 (abfd
, buf
);
17951 result
|= ((LONGEST
) (byte
& 127) << shift
);
17953 if ((byte
& 128) == 0)
17958 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
17959 result
|= -(((LONGEST
) 1) << shift
);
17960 *bytes_read_ptr
= num_read
;
17964 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
17965 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
17966 ADDR_SIZE is the size of addresses from the CU header. */
17969 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
17971 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17972 bfd
*abfd
= objfile
->obfd
;
17973 const gdb_byte
*info_ptr
;
17975 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
17976 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
17977 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
17978 objfile_name (objfile
));
17979 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
17980 error (_("DW_FORM_addr_index pointing outside of "
17981 ".debug_addr section [in module %s]"),
17982 objfile_name (objfile
));
17983 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
17984 + addr_base
+ addr_index
* addr_size
);
17985 if (addr_size
== 4)
17986 return bfd_get_32 (abfd
, info_ptr
);
17988 return bfd_get_64 (abfd
, info_ptr
);
17991 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
17994 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
17996 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
17999 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
18002 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
18003 unsigned int *bytes_read
)
18005 bfd
*abfd
= cu
->objfile
->obfd
;
18006 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
18008 return read_addr_index (cu
, addr_index
);
18011 /* Data structure to pass results from dwarf2_read_addr_index_reader
18012 back to dwarf2_read_addr_index. */
18014 struct dwarf2_read_addr_index_data
18016 ULONGEST addr_base
;
18020 /* die_reader_func for dwarf2_read_addr_index. */
18023 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
18024 const gdb_byte
*info_ptr
,
18025 struct die_info
*comp_unit_die
,
18029 struct dwarf2_cu
*cu
= reader
->cu
;
18030 struct dwarf2_read_addr_index_data
*aidata
=
18031 (struct dwarf2_read_addr_index_data
*) data
;
18033 aidata
->addr_base
= cu
->addr_base
;
18034 aidata
->addr_size
= cu
->header
.addr_size
;
18037 /* Given an index in .debug_addr, fetch the value.
18038 NOTE: This can be called during dwarf expression evaluation,
18039 long after the debug information has been read, and thus per_cu->cu
18040 may no longer exist. */
18043 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
18044 unsigned int addr_index
)
18046 struct objfile
*objfile
= per_cu
->objfile
;
18047 struct dwarf2_cu
*cu
= per_cu
->cu
;
18048 ULONGEST addr_base
;
18051 /* This is intended to be called from outside this file. */
18052 dw2_setup (objfile
);
18054 /* We need addr_base and addr_size.
18055 If we don't have PER_CU->cu, we have to get it.
18056 Nasty, but the alternative is storing the needed info in PER_CU,
18057 which at this point doesn't seem justified: it's not clear how frequently
18058 it would get used and it would increase the size of every PER_CU.
18059 Entry points like dwarf2_per_cu_addr_size do a similar thing
18060 so we're not in uncharted territory here.
18061 Alas we need to be a bit more complicated as addr_base is contained
18064 We don't need to read the entire CU(/TU).
18065 We just need the header and top level die.
18067 IWBN to use the aging mechanism to let us lazily later discard the CU.
18068 For now we skip this optimization. */
18072 addr_base
= cu
->addr_base
;
18073 addr_size
= cu
->header
.addr_size
;
18077 struct dwarf2_read_addr_index_data aidata
;
18079 /* Note: We can't use init_cutu_and_read_dies_simple here,
18080 we need addr_base. */
18081 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
18082 dwarf2_read_addr_index_reader
, &aidata
);
18083 addr_base
= aidata
.addr_base
;
18084 addr_size
= aidata
.addr_size
;
18087 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
18090 /* Given a DW_FORM_GNU_str_index, fetch the string.
18091 This is only used by the Fission support. */
18093 static const char *
18094 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
18096 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18097 const char *objf_name
= objfile_name (objfile
);
18098 bfd
*abfd
= objfile
->obfd
;
18099 struct dwarf2_cu
*cu
= reader
->cu
;
18100 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
18101 struct dwarf2_section_info
*str_offsets_section
=
18102 &reader
->dwo_file
->sections
.str_offsets
;
18103 const gdb_byte
*info_ptr
;
18104 ULONGEST str_offset
;
18105 static const char form_name
[] = "DW_FORM_GNU_str_index";
18107 dwarf2_read_section (objfile
, str_section
);
18108 dwarf2_read_section (objfile
, str_offsets_section
);
18109 if (str_section
->buffer
== NULL
)
18110 error (_("%s used without .debug_str.dwo section"
18111 " in CU at offset 0x%x [in module %s]"),
18112 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18113 if (str_offsets_section
->buffer
== NULL
)
18114 error (_("%s used without .debug_str_offsets.dwo section"
18115 " in CU at offset 0x%x [in module %s]"),
18116 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18117 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
18118 error (_("%s pointing outside of .debug_str_offsets.dwo"
18119 " section in CU at offset 0x%x [in module %s]"),
18120 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18121 info_ptr
= (str_offsets_section
->buffer
18122 + str_index
* cu
->header
.offset_size
);
18123 if (cu
->header
.offset_size
== 4)
18124 str_offset
= bfd_get_32 (abfd
, info_ptr
);
18126 str_offset
= bfd_get_64 (abfd
, info_ptr
);
18127 if (str_offset
>= str_section
->size
)
18128 error (_("Offset from %s pointing outside of"
18129 " .debug_str.dwo section in CU at offset 0x%x [in module %s]"),
18130 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
18131 return (const char *) (str_section
->buffer
+ str_offset
);
18134 /* Return the length of an LEB128 number in BUF. */
18137 leb128_size (const gdb_byte
*buf
)
18139 const gdb_byte
*begin
= buf
;
18145 if ((byte
& 128) == 0)
18146 return buf
- begin
;
18151 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
18160 cu
->language
= language_c
;
18163 case DW_LANG_C_plus_plus
:
18164 case DW_LANG_C_plus_plus_11
:
18165 case DW_LANG_C_plus_plus_14
:
18166 cu
->language
= language_cplus
;
18169 cu
->language
= language_d
;
18171 case DW_LANG_Fortran77
:
18172 case DW_LANG_Fortran90
:
18173 case DW_LANG_Fortran95
:
18174 case DW_LANG_Fortran03
:
18175 case DW_LANG_Fortran08
:
18176 cu
->language
= language_fortran
;
18179 cu
->language
= language_go
;
18181 case DW_LANG_Mips_Assembler
:
18182 cu
->language
= language_asm
;
18184 case DW_LANG_Ada83
:
18185 case DW_LANG_Ada95
:
18186 cu
->language
= language_ada
;
18188 case DW_LANG_Modula2
:
18189 cu
->language
= language_m2
;
18191 case DW_LANG_Pascal83
:
18192 cu
->language
= language_pascal
;
18195 cu
->language
= language_objc
;
18198 case DW_LANG_Rust_old
:
18199 cu
->language
= language_rust
;
18201 case DW_LANG_Cobol74
:
18202 case DW_LANG_Cobol85
:
18204 cu
->language
= language_minimal
;
18207 cu
->language_defn
= language_def (cu
->language
);
18210 /* Return the named attribute or NULL if not there. */
18212 static struct attribute
*
18213 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
18218 struct attribute
*spec
= NULL
;
18220 for (i
= 0; i
< die
->num_attrs
; ++i
)
18222 if (die
->attrs
[i
].name
== name
)
18223 return &die
->attrs
[i
];
18224 if (die
->attrs
[i
].name
== DW_AT_specification
18225 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
18226 spec
= &die
->attrs
[i
];
18232 die
= follow_die_ref (die
, spec
, &cu
);
18238 /* Return the named attribute or NULL if not there,
18239 but do not follow DW_AT_specification, etc.
18240 This is for use in contexts where we're reading .debug_types dies.
18241 Following DW_AT_specification, DW_AT_abstract_origin will take us
18242 back up the chain, and we want to go down. */
18244 static struct attribute
*
18245 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
18249 for (i
= 0; i
< die
->num_attrs
; ++i
)
18250 if (die
->attrs
[i
].name
== name
)
18251 return &die
->attrs
[i
];
18256 /* Return the string associated with a string-typed attribute, or NULL if it
18257 is either not found or is of an incorrect type. */
18259 static const char *
18260 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
18262 struct attribute
*attr
;
18263 const char *str
= NULL
;
18265 attr
= dwarf2_attr (die
, name
, cu
);
18269 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
18270 || attr
->form
== DW_FORM_string
18271 || attr
->form
== DW_FORM_GNU_str_index
18272 || attr
->form
== DW_FORM_GNU_strp_alt
)
18273 str
= DW_STRING (attr
);
18275 complaint (&symfile_complaints
,
18276 _("string type expected for attribute %s for "
18277 "DIE at 0x%x in module %s"),
18278 dwarf_attr_name (name
), to_underlying (die
->sect_off
),
18279 objfile_name (cu
->objfile
));
18285 /* Return non-zero iff the attribute NAME is defined for the given DIE,
18286 and holds a non-zero value. This function should only be used for
18287 DW_FORM_flag or DW_FORM_flag_present attributes. */
18290 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
18292 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
18294 return (attr
&& DW_UNSND (attr
));
18298 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
18300 /* A DIE is a declaration if it has a DW_AT_declaration attribute
18301 which value is non-zero. However, we have to be careful with
18302 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
18303 (via dwarf2_flag_true_p) follows this attribute. So we may
18304 end up accidently finding a declaration attribute that belongs
18305 to a different DIE referenced by the specification attribute,
18306 even though the given DIE does not have a declaration attribute. */
18307 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
18308 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
18311 /* Return the die giving the specification for DIE, if there is
18312 one. *SPEC_CU is the CU containing DIE on input, and the CU
18313 containing the return value on output. If there is no
18314 specification, but there is an abstract origin, that is
18317 static struct die_info
*
18318 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
18320 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
18323 if (spec_attr
== NULL
)
18324 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
18326 if (spec_attr
== NULL
)
18329 return follow_die_ref (die
, spec_attr
, spec_cu
);
18332 /* Stub for free_line_header to match void * callback types. */
18335 free_line_header_voidp (void *arg
)
18337 struct line_header
*lh
= (struct line_header
*) arg
;
18343 line_header::add_include_dir (const char *include_dir
)
18345 if (dwarf_line_debug
>= 2)
18346 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
18347 include_dirs
.size () + 1, include_dir
);
18349 include_dirs
.push_back (include_dir
);
18353 line_header::add_file_name (const char *name
,
18355 unsigned int mod_time
,
18356 unsigned int length
)
18358 if (dwarf_line_debug
>= 2)
18359 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
18360 (unsigned) file_names
.size () + 1, name
);
18362 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
18365 /* A convenience function to find the proper .debug_line section for a CU. */
18367 static struct dwarf2_section_info
*
18368 get_debug_line_section (struct dwarf2_cu
*cu
)
18370 struct dwarf2_section_info
*section
;
18372 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
18374 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18375 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
18376 else if (cu
->per_cu
->is_dwz
)
18378 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
18380 section
= &dwz
->line
;
18383 section
= &dwarf2_per_objfile
->line
;
18388 /* Read directory or file name entry format, starting with byte of
18389 format count entries, ULEB128 pairs of entry formats, ULEB128 of
18390 entries count and the entries themselves in the described entry
18394 read_formatted_entries (bfd
*abfd
, const gdb_byte
**bufp
,
18395 struct line_header
*lh
,
18396 const struct comp_unit_head
*cu_header
,
18397 void (*callback
) (struct line_header
*lh
,
18400 unsigned int mod_time
,
18401 unsigned int length
))
18403 gdb_byte format_count
, formati
;
18404 ULONGEST data_count
, datai
;
18405 const gdb_byte
*buf
= *bufp
;
18406 const gdb_byte
*format_header_data
;
18408 unsigned int bytes_read
;
18410 format_count
= read_1_byte (abfd
, buf
);
18412 format_header_data
= buf
;
18413 for (formati
= 0; formati
< format_count
; formati
++)
18415 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18417 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18421 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
18423 for (datai
= 0; datai
< data_count
; datai
++)
18425 const gdb_byte
*format
= format_header_data
;
18426 struct file_entry fe
;
18428 for (formati
= 0; formati
< format_count
; formati
++)
18430 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
18431 format
+= bytes_read
;
18433 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
18434 format
+= bytes_read
;
18436 gdb::optional
<const char *> string
;
18437 gdb::optional
<unsigned int> uint
;
18441 case DW_FORM_string
:
18442 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
18446 case DW_FORM_line_strp
:
18447 string
.emplace (read_indirect_line_string (abfd
, buf
,
18453 case DW_FORM_data1
:
18454 uint
.emplace (read_1_byte (abfd
, buf
));
18458 case DW_FORM_data2
:
18459 uint
.emplace (read_2_bytes (abfd
, buf
));
18463 case DW_FORM_data4
:
18464 uint
.emplace (read_4_bytes (abfd
, buf
));
18468 case DW_FORM_data8
:
18469 uint
.emplace (read_8_bytes (abfd
, buf
));
18473 case DW_FORM_udata
:
18474 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
18478 case DW_FORM_block
:
18479 /* It is valid only for DW_LNCT_timestamp which is ignored by
18484 switch (content_type
)
18487 if (string
.has_value ())
18490 case DW_LNCT_directory_index
:
18491 if (uint
.has_value ())
18492 fe
.d_index
= (dir_index
) *uint
;
18494 case DW_LNCT_timestamp
:
18495 if (uint
.has_value ())
18496 fe
.mod_time
= *uint
;
18499 if (uint
.has_value ())
18505 complaint (&symfile_complaints
,
18506 _("Unknown format content type %s"),
18507 pulongest (content_type
));
18511 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
18517 /* Read the statement program header starting at OFFSET in
18518 .debug_line, or .debug_line.dwo. Return a pointer
18519 to a struct line_header, allocated using xmalloc.
18520 Returns NULL if there is a problem reading the header, e.g., if it
18521 has a version we don't understand.
18523 NOTE: the strings in the include directory and file name tables of
18524 the returned object point into the dwarf line section buffer,
18525 and must not be freed. */
18527 static line_header_up
18528 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
18530 const gdb_byte
*line_ptr
;
18531 unsigned int bytes_read
, offset_size
;
18533 const char *cur_dir
, *cur_file
;
18534 struct dwarf2_section_info
*section
;
18537 section
= get_debug_line_section (cu
);
18538 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18539 if (section
->buffer
== NULL
)
18541 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18542 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
18544 complaint (&symfile_complaints
, _("missing .debug_line section"));
18548 /* We can't do this until we know the section is non-empty.
18549 Only then do we know we have such a section. */
18550 abfd
= get_section_bfd_owner (section
);
18552 /* Make sure that at least there's room for the total_length field.
18553 That could be 12 bytes long, but we're just going to fudge that. */
18554 if (to_underlying (sect_off
) + 4 >= section
->size
)
18556 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18560 line_header_up
lh (new line_header ());
18562 lh
->sect_off
= sect_off
;
18563 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
18565 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
18567 /* Read in the header. */
18569 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
18570 &bytes_read
, &offset_size
);
18571 line_ptr
+= bytes_read
;
18572 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
18574 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18577 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
18578 lh
->version
= read_2_bytes (abfd
, line_ptr
);
18580 if (lh
->version
> 5)
18582 /* This is a version we don't understand. The format could have
18583 changed in ways we don't handle properly so just punt. */
18584 complaint (&symfile_complaints
,
18585 _("unsupported version in .debug_line section"));
18588 if (lh
->version
>= 5)
18590 gdb_byte segment_selector_size
;
18592 /* Skip address size. */
18593 read_1_byte (abfd
, line_ptr
);
18596 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
18598 if (segment_selector_size
!= 0)
18600 complaint (&symfile_complaints
,
18601 _("unsupported segment selector size %u "
18602 "in .debug_line section"),
18603 segment_selector_size
);
18607 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
18608 line_ptr
+= offset_size
;
18609 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
18611 if (lh
->version
>= 4)
18613 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
18617 lh
->maximum_ops_per_instruction
= 1;
18619 if (lh
->maximum_ops_per_instruction
== 0)
18621 lh
->maximum_ops_per_instruction
= 1;
18622 complaint (&symfile_complaints
,
18623 _("invalid maximum_ops_per_instruction "
18624 "in `.debug_line' section"));
18627 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
18629 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
18631 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
18633 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
18635 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
18637 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
18638 for (i
= 1; i
< lh
->opcode_base
; ++i
)
18640 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
18644 if (lh
->version
>= 5)
18646 /* Read directory table. */
18647 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18648 [] (struct line_header
*lh
, const char *name
,
18649 dir_index d_index
, unsigned int mod_time
,
18650 unsigned int length
)
18652 lh
->add_include_dir (name
);
18655 /* Read file name table. */
18656 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18657 [] (struct line_header
*lh
, const char *name
,
18658 dir_index d_index
, unsigned int mod_time
,
18659 unsigned int length
)
18661 lh
->add_file_name (name
, d_index
, mod_time
, length
);
18666 /* Read directory table. */
18667 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18669 line_ptr
+= bytes_read
;
18670 lh
->add_include_dir (cur_dir
);
18672 line_ptr
+= bytes_read
;
18674 /* Read file name table. */
18675 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18677 unsigned int mod_time
, length
;
18680 line_ptr
+= bytes_read
;
18681 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18682 line_ptr
+= bytes_read
;
18683 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18684 line_ptr
+= bytes_read
;
18685 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18686 line_ptr
+= bytes_read
;
18688 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
18690 line_ptr
+= bytes_read
;
18692 lh
->statement_program_start
= line_ptr
;
18694 if (line_ptr
> (section
->buffer
+ section
->size
))
18695 complaint (&symfile_complaints
,
18696 _("line number info header doesn't "
18697 "fit in `.debug_line' section"));
18702 /* Subroutine of dwarf_decode_lines to simplify it.
18703 Return the file name of the psymtab for included file FILE_INDEX
18704 in line header LH of PST.
18705 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18706 If space for the result is malloc'd, it will be freed by a cleanup.
18707 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
18709 The function creates dangling cleanup registration. */
18711 static const char *
18712 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
18713 const struct partial_symtab
*pst
,
18714 const char *comp_dir
)
18716 const file_entry
&fe
= lh
->file_names
[file_index
];
18717 const char *include_name
= fe
.name
;
18718 const char *include_name_to_compare
= include_name
;
18719 const char *pst_filename
;
18720 char *copied_name
= NULL
;
18723 const char *dir_name
= fe
.include_dir (lh
);
18725 if (!IS_ABSOLUTE_PATH (include_name
)
18726 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
18728 /* Avoid creating a duplicate psymtab for PST.
18729 We do this by comparing INCLUDE_NAME and PST_FILENAME.
18730 Before we do the comparison, however, we need to account
18731 for DIR_NAME and COMP_DIR.
18732 First prepend dir_name (if non-NULL). If we still don't
18733 have an absolute path prepend comp_dir (if non-NULL).
18734 However, the directory we record in the include-file's
18735 psymtab does not contain COMP_DIR (to match the
18736 corresponding symtab(s)).
18741 bash$ gcc -g ./hello.c
18742 include_name = "hello.c"
18744 DW_AT_comp_dir = comp_dir = "/tmp"
18745 DW_AT_name = "./hello.c"
18749 if (dir_name
!= NULL
)
18751 char *tem
= concat (dir_name
, SLASH_STRING
,
18752 include_name
, (char *)NULL
);
18754 make_cleanup (xfree
, tem
);
18755 include_name
= tem
;
18756 include_name_to_compare
= include_name
;
18758 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
18760 char *tem
= concat (comp_dir
, SLASH_STRING
,
18761 include_name
, (char *)NULL
);
18763 make_cleanup (xfree
, tem
);
18764 include_name_to_compare
= tem
;
18768 pst_filename
= pst
->filename
;
18769 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
18771 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
18772 pst_filename
, (char *)NULL
);
18773 pst_filename
= copied_name
;
18776 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
18778 if (copied_name
!= NULL
)
18779 xfree (copied_name
);
18783 return include_name
;
18786 /* State machine to track the state of the line number program. */
18788 class lnp_state_machine
18791 /* Initialize a machine state for the start of a line number
18793 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
18795 file_entry
*current_file ()
18797 /* lh->file_names is 0-based, but the file name numbers in the
18798 statement program are 1-based. */
18799 return m_line_header
->file_name_at (m_file
);
18802 /* Record the line in the state machine. END_SEQUENCE is true if
18803 we're processing the end of a sequence. */
18804 void record_line (bool end_sequence
);
18806 /* Check address and if invalid nop-out the rest of the lines in this
18808 void check_line_address (struct dwarf2_cu
*cu
,
18809 const gdb_byte
*line_ptr
,
18810 CORE_ADDR lowpc
, CORE_ADDR address
);
18812 void handle_set_discriminator (unsigned int discriminator
)
18814 m_discriminator
= discriminator
;
18815 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
18818 /* Handle DW_LNE_set_address. */
18819 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
18822 address
+= baseaddr
;
18823 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
18826 /* Handle DW_LNS_advance_pc. */
18827 void handle_advance_pc (CORE_ADDR adjust
);
18829 /* Handle a special opcode. */
18830 void handle_special_opcode (unsigned char op_code
);
18832 /* Handle DW_LNS_advance_line. */
18833 void handle_advance_line (int line_delta
)
18835 advance_line (line_delta
);
18838 /* Handle DW_LNS_set_file. */
18839 void handle_set_file (file_name_index file
);
18841 /* Handle DW_LNS_negate_stmt. */
18842 void handle_negate_stmt ()
18844 m_is_stmt
= !m_is_stmt
;
18847 /* Handle DW_LNS_const_add_pc. */
18848 void handle_const_add_pc ();
18850 /* Handle DW_LNS_fixed_advance_pc. */
18851 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
18853 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18857 /* Handle DW_LNS_copy. */
18858 void handle_copy ()
18860 record_line (false);
18861 m_discriminator
= 0;
18864 /* Handle DW_LNE_end_sequence. */
18865 void handle_end_sequence ()
18867 m_record_line_callback
= ::record_line
;
18871 /* Advance the line by LINE_DELTA. */
18872 void advance_line (int line_delta
)
18874 m_line
+= line_delta
;
18876 if (line_delta
!= 0)
18877 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18880 gdbarch
*m_gdbarch
;
18882 /* True if we're recording lines.
18883 Otherwise we're building partial symtabs and are just interested in
18884 finding include files mentioned by the line number program. */
18885 bool m_record_lines_p
;
18887 /* The line number header. */
18888 line_header
*m_line_header
;
18890 /* These are part of the standard DWARF line number state machine,
18891 and initialized according to the DWARF spec. */
18893 unsigned char m_op_index
= 0;
18894 /* The line table index (1-based) of the current file. */
18895 file_name_index m_file
= (file_name_index
) 1;
18896 unsigned int m_line
= 1;
18898 /* These are initialized in the constructor. */
18900 CORE_ADDR m_address
;
18902 unsigned int m_discriminator
;
18904 /* Additional bits of state we need to track. */
18906 /* The last file that we called dwarf2_start_subfile for.
18907 This is only used for TLLs. */
18908 unsigned int m_last_file
= 0;
18909 /* The last file a line number was recorded for. */
18910 struct subfile
*m_last_subfile
= NULL
;
18912 /* The function to call to record a line. */
18913 record_line_ftype
*m_record_line_callback
= NULL
;
18915 /* The last line number that was recorded, used to coalesce
18916 consecutive entries for the same line. This can happen, for
18917 example, when discriminators are present. PR 17276. */
18918 unsigned int m_last_line
= 0;
18919 bool m_line_has_non_zero_discriminator
= false;
18923 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
18925 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
18926 / m_line_header
->maximum_ops_per_instruction
)
18927 * m_line_header
->minimum_instruction_length
);
18928 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18929 m_op_index
= ((m_op_index
+ adjust
)
18930 % m_line_header
->maximum_ops_per_instruction
);
18934 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
18936 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
18937 CORE_ADDR addr_adj
= (((m_op_index
18938 + (adj_opcode
/ m_line_header
->line_range
))
18939 / m_line_header
->maximum_ops_per_instruction
)
18940 * m_line_header
->minimum_instruction_length
);
18941 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18942 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
18943 % m_line_header
->maximum_ops_per_instruction
);
18945 int line_delta
= (m_line_header
->line_base
18946 + (adj_opcode
% m_line_header
->line_range
));
18947 advance_line (line_delta
);
18948 record_line (false);
18949 m_discriminator
= 0;
18953 lnp_state_machine::handle_set_file (file_name_index file
)
18957 const file_entry
*fe
= current_file ();
18959 dwarf2_debug_line_missing_file_complaint ();
18960 else if (m_record_lines_p
)
18962 const char *dir
= fe
->include_dir (m_line_header
);
18964 m_last_subfile
= current_subfile
;
18965 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18966 dwarf2_start_subfile (fe
->name
, dir
);
18971 lnp_state_machine::handle_const_add_pc ()
18974 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
18977 = (((m_op_index
+ adjust
)
18978 / m_line_header
->maximum_ops_per_instruction
)
18979 * m_line_header
->minimum_instruction_length
);
18981 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18982 m_op_index
= ((m_op_index
+ adjust
)
18983 % m_line_header
->maximum_ops_per_instruction
);
18986 /* Ignore this record_line request. */
18989 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
18994 /* Return non-zero if we should add LINE to the line number table.
18995 LINE is the line to add, LAST_LINE is the last line that was added,
18996 LAST_SUBFILE is the subfile for LAST_LINE.
18997 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
18998 had a non-zero discriminator.
19000 We have to be careful in the presence of discriminators.
19001 E.g., for this line:
19003 for (i = 0; i < 100000; i++);
19005 clang can emit four line number entries for that one line,
19006 each with a different discriminator.
19007 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
19009 However, we want gdb to coalesce all four entries into one.
19010 Otherwise the user could stepi into the middle of the line and
19011 gdb would get confused about whether the pc really was in the
19012 middle of the line.
19014 Things are further complicated by the fact that two consecutive
19015 line number entries for the same line is a heuristic used by gcc
19016 to denote the end of the prologue. So we can't just discard duplicate
19017 entries, we have to be selective about it. The heuristic we use is
19018 that we only collapse consecutive entries for the same line if at least
19019 one of those entries has a non-zero discriminator. PR 17276.
19021 Note: Addresses in the line number state machine can never go backwards
19022 within one sequence, thus this coalescing is ok. */
19025 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
19026 int line_has_non_zero_discriminator
,
19027 struct subfile
*last_subfile
)
19029 if (current_subfile
!= last_subfile
)
19031 if (line
!= last_line
)
19033 /* Same line for the same file that we've seen already.
19034 As a last check, for pr 17276, only record the line if the line
19035 has never had a non-zero discriminator. */
19036 if (!line_has_non_zero_discriminator
)
19041 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
19042 in the line table of subfile SUBFILE. */
19045 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19046 unsigned int line
, CORE_ADDR address
,
19047 record_line_ftype p_record_line
)
19049 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
19051 if (dwarf_line_debug
)
19053 fprintf_unfiltered (gdb_stdlog
,
19054 "Recording line %u, file %s, address %s\n",
19055 line
, lbasename (subfile
->name
),
19056 paddress (gdbarch
, address
));
19059 (*p_record_line
) (subfile
, line
, addr
);
19062 /* Subroutine of dwarf_decode_lines_1 to simplify it.
19063 Mark the end of a set of line number records.
19064 The arguments are the same as for dwarf_record_line_1.
19065 If SUBFILE is NULL the request is ignored. */
19068 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
19069 CORE_ADDR address
, record_line_ftype p_record_line
)
19071 if (subfile
== NULL
)
19074 if (dwarf_line_debug
)
19076 fprintf_unfiltered (gdb_stdlog
,
19077 "Finishing current line, file %s, address %s\n",
19078 lbasename (subfile
->name
),
19079 paddress (gdbarch
, address
));
19082 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
19086 lnp_state_machine::record_line (bool end_sequence
)
19088 if (dwarf_line_debug
)
19090 fprintf_unfiltered (gdb_stdlog
,
19091 "Processing actual line %u: file %u,"
19092 " address %s, is_stmt %u, discrim %u\n",
19093 m_line
, to_underlying (m_file
),
19094 paddress (m_gdbarch
, m_address
),
19095 m_is_stmt
, m_discriminator
);
19098 file_entry
*fe
= current_file ();
19101 dwarf2_debug_line_missing_file_complaint ();
19102 /* For now we ignore lines not starting on an instruction boundary.
19103 But not when processing end_sequence for compatibility with the
19104 previous version of the code. */
19105 else if (m_op_index
== 0 || end_sequence
)
19107 fe
->included_p
= 1;
19108 if (m_record_lines_p
&& m_is_stmt
)
19110 if (m_last_subfile
!= current_subfile
|| end_sequence
)
19112 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
19113 m_address
, m_record_line_callback
);
19118 if (dwarf_record_line_p (m_line
, m_last_line
,
19119 m_line_has_non_zero_discriminator
,
19122 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
19124 m_record_line_callback
);
19126 m_last_subfile
= current_subfile
;
19127 m_last_line
= m_line
;
19133 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
19134 bool record_lines_p
)
19137 m_record_lines_p
= record_lines_p
;
19138 m_line_header
= lh
;
19140 m_record_line_callback
= ::record_line
;
19142 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
19143 was a line entry for it so that the backend has a chance to adjust it
19144 and also record it in case it needs it. This is currently used by MIPS
19145 code, cf. `mips_adjust_dwarf2_line'. */
19146 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
19147 m_is_stmt
= lh
->default_is_stmt
;
19148 m_discriminator
= 0;
19152 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
19153 const gdb_byte
*line_ptr
,
19154 CORE_ADDR lowpc
, CORE_ADDR address
)
19156 /* If address < lowpc then it's not a usable value, it's outside the
19157 pc range of the CU. However, we restrict the test to only address
19158 values of zero to preserve GDB's previous behaviour which is to
19159 handle the specific case of a function being GC'd by the linker. */
19161 if (address
== 0 && address
< lowpc
)
19163 /* This line table is for a function which has been
19164 GCd by the linker. Ignore it. PR gdb/12528 */
19166 struct objfile
*objfile
= cu
->objfile
;
19167 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
19169 complaint (&symfile_complaints
,
19170 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
19171 line_offset
, objfile_name (objfile
));
19172 m_record_line_callback
= noop_record_line
;
19173 /* Note: record_line_callback is left as noop_record_line until
19174 we see DW_LNE_end_sequence. */
19178 /* Subroutine of dwarf_decode_lines to simplify it.
19179 Process the line number information in LH.
19180 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
19181 program in order to set included_p for every referenced header. */
19184 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
19185 const int decode_for_pst_p
, CORE_ADDR lowpc
)
19187 const gdb_byte
*line_ptr
, *extended_end
;
19188 const gdb_byte
*line_end
;
19189 unsigned int bytes_read
, extended_len
;
19190 unsigned char op_code
, extended_op
;
19191 CORE_ADDR baseaddr
;
19192 struct objfile
*objfile
= cu
->objfile
;
19193 bfd
*abfd
= objfile
->obfd
;
19194 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19195 /* True if we're recording line info (as opposed to building partial
19196 symtabs and just interested in finding include files mentioned by
19197 the line number program). */
19198 bool record_lines_p
= !decode_for_pst_p
;
19200 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19202 line_ptr
= lh
->statement_program_start
;
19203 line_end
= lh
->statement_program_end
;
19205 /* Read the statement sequences until there's nothing left. */
19206 while (line_ptr
< line_end
)
19208 /* The DWARF line number program state machine. Reset the state
19209 machine at the start of each sequence. */
19210 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
19211 bool end_sequence
= false;
19213 if (record_lines_p
)
19215 /* Start a subfile for the current file of the state
19217 const file_entry
*fe
= state_machine
.current_file ();
19220 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
19223 /* Decode the table. */
19224 while (line_ptr
< line_end
&& !end_sequence
)
19226 op_code
= read_1_byte (abfd
, line_ptr
);
19229 if (op_code
>= lh
->opcode_base
)
19231 /* Special opcode. */
19232 state_machine
.handle_special_opcode (op_code
);
19234 else switch (op_code
)
19236 case DW_LNS_extended_op
:
19237 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
19239 line_ptr
+= bytes_read
;
19240 extended_end
= line_ptr
+ extended_len
;
19241 extended_op
= read_1_byte (abfd
, line_ptr
);
19243 switch (extended_op
)
19245 case DW_LNE_end_sequence
:
19246 state_machine
.handle_end_sequence ();
19247 end_sequence
= true;
19249 case DW_LNE_set_address
:
19252 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
19253 line_ptr
+= bytes_read
;
19255 state_machine
.check_line_address (cu
, line_ptr
,
19257 state_machine
.handle_set_address (baseaddr
, address
);
19260 case DW_LNE_define_file
:
19262 const char *cur_file
;
19263 unsigned int mod_time
, length
;
19266 cur_file
= read_direct_string (abfd
, line_ptr
,
19268 line_ptr
+= bytes_read
;
19269 dindex
= (dir_index
)
19270 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19271 line_ptr
+= bytes_read
;
19273 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19274 line_ptr
+= bytes_read
;
19276 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19277 line_ptr
+= bytes_read
;
19278 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
19281 case DW_LNE_set_discriminator
:
19283 /* The discriminator is not interesting to the
19284 debugger; just ignore it. We still need to
19285 check its value though:
19286 if there are consecutive entries for the same
19287 (non-prologue) line we want to coalesce them.
19290 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19291 line_ptr
+= bytes_read
;
19293 state_machine
.handle_set_discriminator (discr
);
19297 complaint (&symfile_complaints
,
19298 _("mangled .debug_line section"));
19301 /* Make sure that we parsed the extended op correctly. If e.g.
19302 we expected a different address size than the producer used,
19303 we may have read the wrong number of bytes. */
19304 if (line_ptr
!= extended_end
)
19306 complaint (&symfile_complaints
,
19307 _("mangled .debug_line section"));
19312 state_machine
.handle_copy ();
19314 case DW_LNS_advance_pc
:
19317 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19318 line_ptr
+= bytes_read
;
19320 state_machine
.handle_advance_pc (adjust
);
19323 case DW_LNS_advance_line
:
19326 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
19327 line_ptr
+= bytes_read
;
19329 state_machine
.handle_advance_line (line_delta
);
19332 case DW_LNS_set_file
:
19334 file_name_index file
19335 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
19337 line_ptr
+= bytes_read
;
19339 state_machine
.handle_set_file (file
);
19342 case DW_LNS_set_column
:
19343 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19344 line_ptr
+= bytes_read
;
19346 case DW_LNS_negate_stmt
:
19347 state_machine
.handle_negate_stmt ();
19349 case DW_LNS_set_basic_block
:
19351 /* Add to the address register of the state machine the
19352 address increment value corresponding to special opcode
19353 255. I.e., this value is scaled by the minimum
19354 instruction length since special opcode 255 would have
19355 scaled the increment. */
19356 case DW_LNS_const_add_pc
:
19357 state_machine
.handle_const_add_pc ();
19359 case DW_LNS_fixed_advance_pc
:
19361 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
19364 state_machine
.handle_fixed_advance_pc (addr_adj
);
19369 /* Unknown standard opcode, ignore it. */
19372 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
19374 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
19375 line_ptr
+= bytes_read
;
19382 dwarf2_debug_line_missing_end_sequence_complaint ();
19384 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
19385 in which case we still finish recording the last line). */
19386 state_machine
.record_line (true);
19390 /* Decode the Line Number Program (LNP) for the given line_header
19391 structure and CU. The actual information extracted and the type
19392 of structures created from the LNP depends on the value of PST.
19394 1. If PST is NULL, then this procedure uses the data from the program
19395 to create all necessary symbol tables, and their linetables.
19397 2. If PST is not NULL, this procedure reads the program to determine
19398 the list of files included by the unit represented by PST, and
19399 builds all the associated partial symbol tables.
19401 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19402 It is used for relative paths in the line table.
19403 NOTE: When processing partial symtabs (pst != NULL),
19404 comp_dir == pst->dirname.
19406 NOTE: It is important that psymtabs have the same file name (via strcmp)
19407 as the corresponding symtab. Since COMP_DIR is not used in the name of the
19408 symtab we don't use it in the name of the psymtabs we create.
19409 E.g. expand_line_sal requires this when finding psymtabs to expand.
19410 A good testcase for this is mb-inline.exp.
19412 LOWPC is the lowest address in CU (or 0 if not known).
19414 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
19415 for its PC<->lines mapping information. Otherwise only the filename
19416 table is read in. */
19419 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
19420 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
19421 CORE_ADDR lowpc
, int decode_mapping
)
19423 struct objfile
*objfile
= cu
->objfile
;
19424 const int decode_for_pst_p
= (pst
!= NULL
);
19426 if (decode_mapping
)
19427 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
19429 if (decode_for_pst_p
)
19433 /* Now that we're done scanning the Line Header Program, we can
19434 create the psymtab of each included file. */
19435 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
19436 if (lh
->file_names
[file_index
].included_p
== 1)
19438 const char *include_name
=
19439 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
19440 if (include_name
!= NULL
)
19441 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
19446 /* Make sure a symtab is created for every file, even files
19447 which contain only variables (i.e. no code with associated
19449 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
19452 for (i
= 0; i
< lh
->file_names
.size (); i
++)
19454 file_entry
&fe
= lh
->file_names
[i
];
19456 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
19458 if (current_subfile
->symtab
== NULL
)
19460 current_subfile
->symtab
19461 = allocate_symtab (cust
, current_subfile
->name
);
19463 fe
.symtab
= current_subfile
->symtab
;
19468 /* Start a subfile for DWARF. FILENAME is the name of the file and
19469 DIRNAME the name of the source directory which contains FILENAME
19470 or NULL if not known.
19471 This routine tries to keep line numbers from identical absolute and
19472 relative file names in a common subfile.
19474 Using the `list' example from the GDB testsuite, which resides in
19475 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
19476 of /srcdir/list0.c yields the following debugging information for list0.c:
19478 DW_AT_name: /srcdir/list0.c
19479 DW_AT_comp_dir: /compdir
19480 files.files[0].name: list0.h
19481 files.files[0].dir: /srcdir
19482 files.files[1].name: list0.c
19483 files.files[1].dir: /srcdir
19485 The line number information for list0.c has to end up in a single
19486 subfile, so that `break /srcdir/list0.c:1' works as expected.
19487 start_subfile will ensure that this happens provided that we pass the
19488 concatenation of files.files[1].dir and files.files[1].name as the
19492 dwarf2_start_subfile (const char *filename
, const char *dirname
)
19496 /* In order not to lose the line information directory,
19497 we concatenate it to the filename when it makes sense.
19498 Note that the Dwarf3 standard says (speaking of filenames in line
19499 information): ``The directory index is ignored for file names
19500 that represent full path names''. Thus ignoring dirname in the
19501 `else' branch below isn't an issue. */
19503 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
19505 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
19509 start_subfile (filename
);
19515 /* Start a symtab for DWARF.
19516 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
19518 static struct compunit_symtab
*
19519 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
19520 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
19522 struct compunit_symtab
*cust
19523 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
, cu
->language
);
19525 record_debugformat ("DWARF 2");
19526 record_producer (cu
->producer
);
19528 /* We assume that we're processing GCC output. */
19529 processing_gcc_compilation
= 2;
19531 cu
->processing_has_namespace_info
= 0;
19537 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
19538 struct dwarf2_cu
*cu
)
19540 struct objfile
*objfile
= cu
->objfile
;
19541 struct comp_unit_head
*cu_header
= &cu
->header
;
19543 /* NOTE drow/2003-01-30: There used to be a comment and some special
19544 code here to turn a symbol with DW_AT_external and a
19545 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
19546 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
19547 with some versions of binutils) where shared libraries could have
19548 relocations against symbols in their debug information - the
19549 minimal symbol would have the right address, but the debug info
19550 would not. It's no longer necessary, because we will explicitly
19551 apply relocations when we read in the debug information now. */
19553 /* A DW_AT_location attribute with no contents indicates that a
19554 variable has been optimized away. */
19555 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
19557 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19561 /* Handle one degenerate form of location expression specially, to
19562 preserve GDB's previous behavior when section offsets are
19563 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
19564 then mark this symbol as LOC_STATIC. */
19566 if (attr_form_is_block (attr
)
19567 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
19568 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
19569 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
19570 && (DW_BLOCK (attr
)->size
19571 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
19573 unsigned int dummy
;
19575 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
19576 SYMBOL_VALUE_ADDRESS (sym
) =
19577 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
19579 SYMBOL_VALUE_ADDRESS (sym
) =
19580 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
19581 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
19582 fixup_symbol_section (sym
, objfile
);
19583 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
19584 SYMBOL_SECTION (sym
));
19588 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
19589 expression evaluator, and use LOC_COMPUTED only when necessary
19590 (i.e. when the value of a register or memory location is
19591 referenced, or a thread-local block, etc.). Then again, it might
19592 not be worthwhile. I'm assuming that it isn't unless performance
19593 or memory numbers show me otherwise. */
19595 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
19597 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
19598 cu
->has_loclist
= 1;
19601 /* Given a pointer to a DWARF information entry, figure out if we need
19602 to make a symbol table entry for it, and if so, create a new entry
19603 and return a pointer to it.
19604 If TYPE is NULL, determine symbol type from the die, otherwise
19605 used the passed type.
19606 If SPACE is not NULL, use it to hold the new symbol. If it is
19607 NULL, allocate a new symbol on the objfile's obstack. */
19609 static struct symbol
*
19610 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
19611 struct symbol
*space
)
19613 struct objfile
*objfile
= cu
->objfile
;
19614 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19615 struct symbol
*sym
= NULL
;
19617 struct attribute
*attr
= NULL
;
19618 struct attribute
*attr2
= NULL
;
19619 CORE_ADDR baseaddr
;
19620 struct pending
**list_to_add
= NULL
;
19622 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
19624 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19626 name
= dwarf2_name (die
, cu
);
19629 const char *linkagename
;
19630 int suppress_add
= 0;
19635 sym
= allocate_symbol (objfile
);
19636 OBJSTAT (objfile
, n_syms
++);
19638 /* Cache this symbol's name and the name's demangled form (if any). */
19639 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
19640 linkagename
= dwarf2_physname (name
, die
, cu
);
19641 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
19643 /* Fortran does not have mangling standard and the mangling does differ
19644 between gfortran, iFort etc. */
19645 if (cu
->language
== language_fortran
19646 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
19647 symbol_set_demangled_name (&(sym
->ginfo
),
19648 dwarf2_full_name (name
, die
, cu
),
19651 /* Default assumptions.
19652 Use the passed type or decode it from the die. */
19653 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19654 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19656 SYMBOL_TYPE (sym
) = type
;
19658 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
19659 attr
= dwarf2_attr (die
,
19660 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
19664 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
19667 attr
= dwarf2_attr (die
,
19668 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
19672 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
19673 struct file_entry
*fe
;
19675 if (cu
->line_header
!= NULL
)
19676 fe
= cu
->line_header
->file_name_at (file_index
);
19681 complaint (&symfile_complaints
,
19682 _("file index out of range"));
19684 symbol_set_symtab (sym
, fe
->symtab
);
19690 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
19695 addr
= attr_value_as_address (attr
);
19696 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
19697 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
19699 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
19700 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
19701 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
19702 add_symbol_to_list (sym
, cu
->list_in_scope
);
19704 case DW_TAG_subprogram
:
19705 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19707 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19708 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19709 if ((attr2
&& (DW_UNSND (attr2
) != 0))
19710 || cu
->language
== language_ada
)
19712 /* Subprograms marked external are stored as a global symbol.
19713 Ada subprograms, whether marked external or not, are always
19714 stored as a global symbol, because we want to be able to
19715 access them globally. For instance, we want to be able
19716 to break on a nested subprogram without having to
19717 specify the context. */
19718 list_to_add
= &global_symbols
;
19722 list_to_add
= cu
->list_in_scope
;
19725 case DW_TAG_inlined_subroutine
:
19726 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19728 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19729 SYMBOL_INLINED (sym
) = 1;
19730 list_to_add
= cu
->list_in_scope
;
19732 case DW_TAG_template_value_param
:
19734 /* Fall through. */
19735 case DW_TAG_constant
:
19736 case DW_TAG_variable
:
19737 case DW_TAG_member
:
19738 /* Compilation with minimal debug info may result in
19739 variables with missing type entries. Change the
19740 misleading `void' type to something sensible. */
19741 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
19742 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
19744 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19745 /* In the case of DW_TAG_member, we should only be called for
19746 static const members. */
19747 if (die
->tag
== DW_TAG_member
)
19749 /* dwarf2_add_field uses die_is_declaration,
19750 so we do the same. */
19751 gdb_assert (die_is_declaration (die
, cu
));
19756 dwarf2_const_value (attr
, sym
, cu
);
19757 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19760 if (attr2
&& (DW_UNSND (attr2
) != 0))
19761 list_to_add
= &global_symbols
;
19763 list_to_add
= cu
->list_in_scope
;
19767 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19770 var_decode_location (attr
, sym
, cu
);
19771 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19773 /* Fortran explicitly imports any global symbols to the local
19774 scope by DW_TAG_common_block. */
19775 if (cu
->language
== language_fortran
&& die
->parent
19776 && die
->parent
->tag
== DW_TAG_common_block
)
19779 if (SYMBOL_CLASS (sym
) == LOC_STATIC
19780 && SYMBOL_VALUE_ADDRESS (sym
) == 0
19781 && !dwarf2_per_objfile
->has_section_at_zero
)
19783 /* When a static variable is eliminated by the linker,
19784 the corresponding debug information is not stripped
19785 out, but the variable address is set to null;
19786 do not add such variables into symbol table. */
19788 else if (attr2
&& (DW_UNSND (attr2
) != 0))
19790 /* Workaround gfortran PR debug/40040 - it uses
19791 DW_AT_location for variables in -fPIC libraries which may
19792 get overriden by other libraries/executable and get
19793 a different address. Resolve it by the minimal symbol
19794 which may come from inferior's executable using copy
19795 relocation. Make this workaround only for gfortran as for
19796 other compilers GDB cannot guess the minimal symbol
19797 Fortran mangling kind. */
19798 if (cu
->language
== language_fortran
&& die
->parent
19799 && die
->parent
->tag
== DW_TAG_module
19801 && startswith (cu
->producer
, "GNU Fortran"))
19802 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19804 /* A variable with DW_AT_external is never static,
19805 but it may be block-scoped. */
19806 list_to_add
= (cu
->list_in_scope
== &file_symbols
19807 ? &global_symbols
: cu
->list_in_scope
);
19810 list_to_add
= cu
->list_in_scope
;
19814 /* We do not know the address of this symbol.
19815 If it is an external symbol and we have type information
19816 for it, enter the symbol as a LOC_UNRESOLVED symbol.
19817 The address of the variable will then be determined from
19818 the minimal symbol table whenever the variable is
19820 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19822 /* Fortran explicitly imports any global symbols to the local
19823 scope by DW_TAG_common_block. */
19824 if (cu
->language
== language_fortran
&& die
->parent
19825 && die
->parent
->tag
== DW_TAG_common_block
)
19827 /* SYMBOL_CLASS doesn't matter here because
19828 read_common_block is going to reset it. */
19830 list_to_add
= cu
->list_in_scope
;
19832 else if (attr2
&& (DW_UNSND (attr2
) != 0)
19833 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
19835 /* A variable with DW_AT_external is never static, but it
19836 may be block-scoped. */
19837 list_to_add
= (cu
->list_in_scope
== &file_symbols
19838 ? &global_symbols
: cu
->list_in_scope
);
19840 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19842 else if (!die_is_declaration (die
, cu
))
19844 /* Use the default LOC_OPTIMIZED_OUT class. */
19845 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
19847 list_to_add
= cu
->list_in_scope
;
19851 case DW_TAG_formal_parameter
:
19852 /* If we are inside a function, mark this as an argument. If
19853 not, we might be looking at an argument to an inlined function
19854 when we do not have enough information to show inlined frames;
19855 pretend it's a local variable in that case so that the user can
19857 if (context_stack_depth
> 0
19858 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
19859 SYMBOL_IS_ARGUMENT (sym
) = 1;
19860 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19863 var_decode_location (attr
, sym
, cu
);
19865 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19868 dwarf2_const_value (attr
, sym
, cu
);
19871 list_to_add
= cu
->list_in_scope
;
19873 case DW_TAG_unspecified_parameters
:
19874 /* From varargs functions; gdb doesn't seem to have any
19875 interest in this information, so just ignore it for now.
19878 case DW_TAG_template_type_param
:
19880 /* Fall through. */
19881 case DW_TAG_class_type
:
19882 case DW_TAG_interface_type
:
19883 case DW_TAG_structure_type
:
19884 case DW_TAG_union_type
:
19885 case DW_TAG_set_type
:
19886 case DW_TAG_enumeration_type
:
19887 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19888 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
19891 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
19892 really ever be static objects: otherwise, if you try
19893 to, say, break of a class's method and you're in a file
19894 which doesn't mention that class, it won't work unless
19895 the check for all static symbols in lookup_symbol_aux
19896 saves you. See the OtherFileClass tests in
19897 gdb.c++/namespace.exp. */
19901 list_to_add
= (cu
->list_in_scope
== &file_symbols
19902 && cu
->language
== language_cplus
19903 ? &global_symbols
: cu
->list_in_scope
);
19905 /* The semantics of C++ state that "struct foo {
19906 ... }" also defines a typedef for "foo". */
19907 if (cu
->language
== language_cplus
19908 || cu
->language
== language_ada
19909 || cu
->language
== language_d
19910 || cu
->language
== language_rust
)
19912 /* The symbol's name is already allocated along
19913 with this objfile, so we don't need to
19914 duplicate it for the type. */
19915 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
19916 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
19921 case DW_TAG_typedef
:
19922 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19923 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19924 list_to_add
= cu
->list_in_scope
;
19926 case DW_TAG_base_type
:
19927 case DW_TAG_subrange_type
:
19928 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19929 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19930 list_to_add
= cu
->list_in_scope
;
19932 case DW_TAG_enumerator
:
19933 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19936 dwarf2_const_value (attr
, sym
, cu
);
19939 /* NOTE: carlton/2003-11-10: See comment above in the
19940 DW_TAG_class_type, etc. block. */
19942 list_to_add
= (cu
->list_in_scope
== &file_symbols
19943 && cu
->language
== language_cplus
19944 ? &global_symbols
: cu
->list_in_scope
);
19947 case DW_TAG_imported_declaration
:
19948 case DW_TAG_namespace
:
19949 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19950 list_to_add
= &global_symbols
;
19952 case DW_TAG_module
:
19953 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19954 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
19955 list_to_add
= &global_symbols
;
19957 case DW_TAG_common_block
:
19958 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
19959 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
19960 add_symbol_to_list (sym
, cu
->list_in_scope
);
19963 /* Not a tag we recognize. Hopefully we aren't processing
19964 trash data, but since we must specifically ignore things
19965 we don't recognize, there is nothing else we should do at
19967 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
19968 dwarf_tag_name (die
->tag
));
19974 sym
->hash_next
= objfile
->template_symbols
;
19975 objfile
->template_symbols
= sym
;
19976 list_to_add
= NULL
;
19979 if (list_to_add
!= NULL
)
19980 add_symbol_to_list (sym
, list_to_add
);
19982 /* For the benefit of old versions of GCC, check for anonymous
19983 namespaces based on the demangled name. */
19984 if (!cu
->processing_has_namespace_info
19985 && cu
->language
== language_cplus
)
19986 cp_scan_for_anonymous_namespaces (sym
, objfile
);
19991 /* A wrapper for new_symbol_full that always allocates a new symbol. */
19993 static struct symbol
*
19994 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19996 return new_symbol_full (die
, type
, cu
, NULL
);
19999 /* Given an attr with a DW_FORM_dataN value in host byte order,
20000 zero-extend it as appropriate for the symbol's type. The DWARF
20001 standard (v4) is not entirely clear about the meaning of using
20002 DW_FORM_dataN for a constant with a signed type, where the type is
20003 wider than the data. The conclusion of a discussion on the DWARF
20004 list was that this is unspecified. We choose to always zero-extend
20005 because that is the interpretation long in use by GCC. */
20008 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
20009 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
20011 struct objfile
*objfile
= cu
->objfile
;
20012 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
20013 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
20014 LONGEST l
= DW_UNSND (attr
);
20016 if (bits
< sizeof (*value
) * 8)
20018 l
&= ((LONGEST
) 1 << bits
) - 1;
20021 else if (bits
== sizeof (*value
) * 8)
20025 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
20026 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
20033 /* Read a constant value from an attribute. Either set *VALUE, or if
20034 the value does not fit in *VALUE, set *BYTES - either already
20035 allocated on the objfile obstack, or newly allocated on OBSTACK,
20036 or, set *BATON, if we translated the constant to a location
20040 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
20041 const char *name
, struct obstack
*obstack
,
20042 struct dwarf2_cu
*cu
,
20043 LONGEST
*value
, const gdb_byte
**bytes
,
20044 struct dwarf2_locexpr_baton
**baton
)
20046 struct objfile
*objfile
= cu
->objfile
;
20047 struct comp_unit_head
*cu_header
= &cu
->header
;
20048 struct dwarf_block
*blk
;
20049 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
20050 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20056 switch (attr
->form
)
20059 case DW_FORM_GNU_addr_index
:
20063 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
20064 dwarf2_const_value_length_mismatch_complaint (name
,
20065 cu_header
->addr_size
,
20066 TYPE_LENGTH (type
));
20067 /* Symbols of this form are reasonably rare, so we just
20068 piggyback on the existing location code rather than writing
20069 a new implementation of symbol_computed_ops. */
20070 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
20071 (*baton
)->per_cu
= cu
->per_cu
;
20072 gdb_assert ((*baton
)->per_cu
);
20074 (*baton
)->size
= 2 + cu_header
->addr_size
;
20075 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
20076 (*baton
)->data
= data
;
20078 data
[0] = DW_OP_addr
;
20079 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
20080 byte_order
, DW_ADDR (attr
));
20081 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
20084 case DW_FORM_string
:
20086 case DW_FORM_GNU_str_index
:
20087 case DW_FORM_GNU_strp_alt
:
20088 /* DW_STRING is already allocated on the objfile obstack, point
20090 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
20092 case DW_FORM_block1
:
20093 case DW_FORM_block2
:
20094 case DW_FORM_block4
:
20095 case DW_FORM_block
:
20096 case DW_FORM_exprloc
:
20097 case DW_FORM_data16
:
20098 blk
= DW_BLOCK (attr
);
20099 if (TYPE_LENGTH (type
) != blk
->size
)
20100 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
20101 TYPE_LENGTH (type
));
20102 *bytes
= blk
->data
;
20105 /* The DW_AT_const_value attributes are supposed to carry the
20106 symbol's value "represented as it would be on the target
20107 architecture." By the time we get here, it's already been
20108 converted to host endianness, so we just need to sign- or
20109 zero-extend it as appropriate. */
20110 case DW_FORM_data1
:
20111 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
20113 case DW_FORM_data2
:
20114 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
20116 case DW_FORM_data4
:
20117 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
20119 case DW_FORM_data8
:
20120 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
20123 case DW_FORM_sdata
:
20124 case DW_FORM_implicit_const
:
20125 *value
= DW_SND (attr
);
20128 case DW_FORM_udata
:
20129 *value
= DW_UNSND (attr
);
20133 complaint (&symfile_complaints
,
20134 _("unsupported const value attribute form: '%s'"),
20135 dwarf_form_name (attr
->form
));
20142 /* Copy constant value from an attribute to a symbol. */
20145 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
20146 struct dwarf2_cu
*cu
)
20148 struct objfile
*objfile
= cu
->objfile
;
20150 const gdb_byte
*bytes
;
20151 struct dwarf2_locexpr_baton
*baton
;
20153 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
20154 SYMBOL_PRINT_NAME (sym
),
20155 &objfile
->objfile_obstack
, cu
,
20156 &value
, &bytes
, &baton
);
20160 SYMBOL_LOCATION_BATON (sym
) = baton
;
20161 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
20163 else if (bytes
!= NULL
)
20165 SYMBOL_VALUE_BYTES (sym
) = bytes
;
20166 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
20170 SYMBOL_VALUE (sym
) = value
;
20171 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
20175 /* Return the type of the die in question using its DW_AT_type attribute. */
20177 static struct type
*
20178 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20180 struct attribute
*type_attr
;
20182 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
20185 /* A missing DW_AT_type represents a void type. */
20186 return objfile_type (cu
->objfile
)->builtin_void
;
20189 return lookup_die_type (die
, type_attr
, cu
);
20192 /* True iff CU's producer generates GNAT Ada auxiliary information
20193 that allows to find parallel types through that information instead
20194 of having to do expensive parallel lookups by type name. */
20197 need_gnat_info (struct dwarf2_cu
*cu
)
20199 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
20200 of GNAT produces this auxiliary information, without any indication
20201 that it is produced. Part of enhancing the FSF version of GNAT
20202 to produce that information will be to put in place an indicator
20203 that we can use in order to determine whether the descriptive type
20204 info is available or not. One suggestion that has been made is
20205 to use a new attribute, attached to the CU die. For now, assume
20206 that the descriptive type info is not available. */
20210 /* Return the auxiliary type of the die in question using its
20211 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
20212 attribute is not present. */
20214 static struct type
*
20215 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20217 struct attribute
*type_attr
;
20219 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
20223 return lookup_die_type (die
, type_attr
, cu
);
20226 /* If DIE has a descriptive_type attribute, then set the TYPE's
20227 descriptive type accordingly. */
20230 set_descriptive_type (struct type
*type
, struct die_info
*die
,
20231 struct dwarf2_cu
*cu
)
20233 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
20235 if (descriptive_type
)
20237 ALLOCATE_GNAT_AUX_TYPE (type
);
20238 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
20242 /* Return the containing type of the die in question using its
20243 DW_AT_containing_type attribute. */
20245 static struct type
*
20246 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
20248 struct attribute
*type_attr
;
20250 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
20252 error (_("Dwarf Error: Problem turning containing type into gdb type "
20253 "[in module %s]"), objfile_name (cu
->objfile
));
20255 return lookup_die_type (die
, type_attr
, cu
);
20258 /* Return an error marker type to use for the ill formed type in DIE/CU. */
20260 static struct type
*
20261 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
20263 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20264 char *message
, *saved
;
20266 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
20267 objfile_name (objfile
),
20268 to_underlying (cu
->header
.sect_off
),
20269 to_underlying (die
->sect_off
));
20270 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
20271 message
, strlen (message
));
20274 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
20277 /* Look up the type of DIE in CU using its type attribute ATTR.
20278 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
20279 DW_AT_containing_type.
20280 If there is no type substitute an error marker. */
20282 static struct type
*
20283 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
20284 struct dwarf2_cu
*cu
)
20286 struct objfile
*objfile
= cu
->objfile
;
20287 struct type
*this_type
;
20289 gdb_assert (attr
->name
== DW_AT_type
20290 || attr
->name
== DW_AT_GNAT_descriptive_type
20291 || attr
->name
== DW_AT_containing_type
);
20293 /* First see if we have it cached. */
20295 if (attr
->form
== DW_FORM_GNU_ref_alt
)
20297 struct dwarf2_per_cu_data
*per_cu
;
20298 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20300 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, cu
->objfile
);
20301 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
20303 else if (attr_form_is_ref (attr
))
20305 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20307 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
20309 else if (attr
->form
== DW_FORM_ref_sig8
)
20311 ULONGEST signature
= DW_SIGNATURE (attr
);
20313 return get_signatured_type (die
, signature
, cu
);
20317 complaint (&symfile_complaints
,
20318 _("Dwarf Error: Bad type attribute %s in DIE"
20319 " at 0x%x [in module %s]"),
20320 dwarf_attr_name (attr
->name
), to_underlying (die
->sect_off
),
20321 objfile_name (objfile
));
20322 return build_error_marker_type (cu
, die
);
20325 /* If not cached we need to read it in. */
20327 if (this_type
== NULL
)
20329 struct die_info
*type_die
= NULL
;
20330 struct dwarf2_cu
*type_cu
= cu
;
20332 if (attr_form_is_ref (attr
))
20333 type_die
= follow_die_ref (die
, attr
, &type_cu
);
20334 if (type_die
== NULL
)
20335 return build_error_marker_type (cu
, die
);
20336 /* If we find the type now, it's probably because the type came
20337 from an inter-CU reference and the type's CU got expanded before
20339 this_type
= read_type_die (type_die
, type_cu
);
20342 /* If we still don't have a type use an error marker. */
20344 if (this_type
== NULL
)
20345 return build_error_marker_type (cu
, die
);
20350 /* Return the type in DIE, CU.
20351 Returns NULL for invalid types.
20353 This first does a lookup in die_type_hash,
20354 and only reads the die in if necessary.
20356 NOTE: This can be called when reading in partial or full symbols. */
20358 static struct type
*
20359 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
20361 struct type
*this_type
;
20363 this_type
= get_die_type (die
, cu
);
20367 return read_type_die_1 (die
, cu
);
20370 /* Read the type in DIE, CU.
20371 Returns NULL for invalid types. */
20373 static struct type
*
20374 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
20376 struct type
*this_type
= NULL
;
20380 case DW_TAG_class_type
:
20381 case DW_TAG_interface_type
:
20382 case DW_TAG_structure_type
:
20383 case DW_TAG_union_type
:
20384 this_type
= read_structure_type (die
, cu
);
20386 case DW_TAG_enumeration_type
:
20387 this_type
= read_enumeration_type (die
, cu
);
20389 case DW_TAG_subprogram
:
20390 case DW_TAG_subroutine_type
:
20391 case DW_TAG_inlined_subroutine
:
20392 this_type
= read_subroutine_type (die
, cu
);
20394 case DW_TAG_array_type
:
20395 this_type
= read_array_type (die
, cu
);
20397 case DW_TAG_set_type
:
20398 this_type
= read_set_type (die
, cu
);
20400 case DW_TAG_pointer_type
:
20401 this_type
= read_tag_pointer_type (die
, cu
);
20403 case DW_TAG_ptr_to_member_type
:
20404 this_type
= read_tag_ptr_to_member_type (die
, cu
);
20406 case DW_TAG_reference_type
:
20407 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
20409 case DW_TAG_rvalue_reference_type
:
20410 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
20412 case DW_TAG_const_type
:
20413 this_type
= read_tag_const_type (die
, cu
);
20415 case DW_TAG_volatile_type
:
20416 this_type
= read_tag_volatile_type (die
, cu
);
20418 case DW_TAG_restrict_type
:
20419 this_type
= read_tag_restrict_type (die
, cu
);
20421 case DW_TAG_string_type
:
20422 this_type
= read_tag_string_type (die
, cu
);
20424 case DW_TAG_typedef
:
20425 this_type
= read_typedef (die
, cu
);
20427 case DW_TAG_subrange_type
:
20428 this_type
= read_subrange_type (die
, cu
);
20430 case DW_TAG_base_type
:
20431 this_type
= read_base_type (die
, cu
);
20433 case DW_TAG_unspecified_type
:
20434 this_type
= read_unspecified_type (die
, cu
);
20436 case DW_TAG_namespace
:
20437 this_type
= read_namespace_type (die
, cu
);
20439 case DW_TAG_module
:
20440 this_type
= read_module_type (die
, cu
);
20442 case DW_TAG_atomic_type
:
20443 this_type
= read_tag_atomic_type (die
, cu
);
20446 complaint (&symfile_complaints
,
20447 _("unexpected tag in read_type_die: '%s'"),
20448 dwarf_tag_name (die
->tag
));
20455 /* See if we can figure out if the class lives in a namespace. We do
20456 this by looking for a member function; its demangled name will
20457 contain namespace info, if there is any.
20458 Return the computed name or NULL.
20459 Space for the result is allocated on the objfile's obstack.
20460 This is the full-die version of guess_partial_die_structure_name.
20461 In this case we know DIE has no useful parent. */
20464 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20466 struct die_info
*spec_die
;
20467 struct dwarf2_cu
*spec_cu
;
20468 struct die_info
*child
;
20471 spec_die
= die_specification (die
, &spec_cu
);
20472 if (spec_die
!= NULL
)
20478 for (child
= die
->child
;
20480 child
= child
->sibling
)
20482 if (child
->tag
== DW_TAG_subprogram
)
20484 const char *linkage_name
= dw2_linkage_name (child
, cu
);
20486 if (linkage_name
!= NULL
)
20489 = language_class_name_from_physname (cu
->language_defn
,
20493 if (actual_name
!= NULL
)
20495 const char *die_name
= dwarf2_name (die
, cu
);
20497 if (die_name
!= NULL
20498 && strcmp (die_name
, actual_name
) != 0)
20500 /* Strip off the class name from the full name.
20501 We want the prefix. */
20502 int die_name_len
= strlen (die_name
);
20503 int actual_name_len
= strlen (actual_name
);
20505 /* Test for '::' as a sanity check. */
20506 if (actual_name_len
> die_name_len
+ 2
20507 && actual_name
[actual_name_len
20508 - die_name_len
- 1] == ':')
20509 name
= (char *) obstack_copy0 (
20510 &cu
->objfile
->per_bfd
->storage_obstack
,
20511 actual_name
, actual_name_len
- die_name_len
- 2);
20514 xfree (actual_name
);
20523 /* GCC might emit a nameless typedef that has a linkage name. Determine the
20524 prefix part in such case. See
20525 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20527 static const char *
20528 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20530 struct attribute
*attr
;
20533 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
20534 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
20537 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
20540 attr
= dw2_linkage_name_attr (die
, cu
);
20541 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20544 /* dwarf2_name had to be already called. */
20545 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
20547 /* Strip the base name, keep any leading namespaces/classes. */
20548 base
= strrchr (DW_STRING (attr
), ':');
20549 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
20552 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20554 &base
[-1] - DW_STRING (attr
));
20557 /* Return the name of the namespace/class that DIE is defined within,
20558 or "" if we can't tell. The caller should not xfree the result.
20560 For example, if we're within the method foo() in the following
20570 then determine_prefix on foo's die will return "N::C". */
20572 static const char *
20573 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20575 struct die_info
*parent
, *spec_die
;
20576 struct dwarf2_cu
*spec_cu
;
20577 struct type
*parent_type
;
20578 const char *retval
;
20580 if (cu
->language
!= language_cplus
20581 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
20582 && cu
->language
!= language_rust
)
20585 retval
= anonymous_struct_prefix (die
, cu
);
20589 /* We have to be careful in the presence of DW_AT_specification.
20590 For example, with GCC 3.4, given the code
20594 // Definition of N::foo.
20598 then we'll have a tree of DIEs like this:
20600 1: DW_TAG_compile_unit
20601 2: DW_TAG_namespace // N
20602 3: DW_TAG_subprogram // declaration of N::foo
20603 4: DW_TAG_subprogram // definition of N::foo
20604 DW_AT_specification // refers to die #3
20606 Thus, when processing die #4, we have to pretend that we're in
20607 the context of its DW_AT_specification, namely the contex of die
20610 spec_die
= die_specification (die
, &spec_cu
);
20611 if (spec_die
== NULL
)
20612 parent
= die
->parent
;
20615 parent
= spec_die
->parent
;
20619 if (parent
== NULL
)
20621 else if (parent
->building_fullname
)
20624 const char *parent_name
;
20626 /* It has been seen on RealView 2.2 built binaries,
20627 DW_TAG_template_type_param types actually _defined_ as
20628 children of the parent class:
20631 template class <class Enum> Class{};
20632 Class<enum E> class_e;
20634 1: DW_TAG_class_type (Class)
20635 2: DW_TAG_enumeration_type (E)
20636 3: DW_TAG_enumerator (enum1:0)
20637 3: DW_TAG_enumerator (enum2:1)
20639 2: DW_TAG_template_type_param
20640 DW_AT_type DW_FORM_ref_udata (E)
20642 Besides being broken debug info, it can put GDB into an
20643 infinite loop. Consider:
20645 When we're building the full name for Class<E>, we'll start
20646 at Class, and go look over its template type parameters,
20647 finding E. We'll then try to build the full name of E, and
20648 reach here. We're now trying to build the full name of E,
20649 and look over the parent DIE for containing scope. In the
20650 broken case, if we followed the parent DIE of E, we'd again
20651 find Class, and once again go look at its template type
20652 arguments, etc., etc. Simply don't consider such parent die
20653 as source-level parent of this die (it can't be, the language
20654 doesn't allow it), and break the loop here. */
20655 name
= dwarf2_name (die
, cu
);
20656 parent_name
= dwarf2_name (parent
, cu
);
20657 complaint (&symfile_complaints
,
20658 _("template param type '%s' defined within parent '%s'"),
20659 name
? name
: "<unknown>",
20660 parent_name
? parent_name
: "<unknown>");
20664 switch (parent
->tag
)
20666 case DW_TAG_namespace
:
20667 parent_type
= read_type_die (parent
, cu
);
20668 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
20669 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
20670 Work around this problem here. */
20671 if (cu
->language
== language_cplus
20672 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
20674 /* We give a name to even anonymous namespaces. */
20675 return TYPE_TAG_NAME (parent_type
);
20676 case DW_TAG_class_type
:
20677 case DW_TAG_interface_type
:
20678 case DW_TAG_structure_type
:
20679 case DW_TAG_union_type
:
20680 case DW_TAG_module
:
20681 parent_type
= read_type_die (parent
, cu
);
20682 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20683 return TYPE_TAG_NAME (parent_type
);
20685 /* An anonymous structure is only allowed non-static data
20686 members; no typedefs, no member functions, et cetera.
20687 So it does not need a prefix. */
20689 case DW_TAG_compile_unit
:
20690 case DW_TAG_partial_unit
:
20691 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
20692 if (cu
->language
== language_cplus
20693 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
20694 && die
->child
!= NULL
20695 && (die
->tag
== DW_TAG_class_type
20696 || die
->tag
== DW_TAG_structure_type
20697 || die
->tag
== DW_TAG_union_type
))
20699 char *name
= guess_full_die_structure_name (die
, cu
);
20704 case DW_TAG_enumeration_type
:
20705 parent_type
= read_type_die (parent
, cu
);
20706 if (TYPE_DECLARED_CLASS (parent_type
))
20708 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20709 return TYPE_TAG_NAME (parent_type
);
20712 /* Fall through. */
20714 return determine_prefix (parent
, cu
);
20718 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
20719 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
20720 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
20721 an obconcat, otherwise allocate storage for the result. The CU argument is
20722 used to determine the language and hence, the appropriate separator. */
20724 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
20727 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
20728 int physname
, struct dwarf2_cu
*cu
)
20730 const char *lead
= "";
20733 if (suffix
== NULL
|| suffix
[0] == '\0'
20734 || prefix
== NULL
|| prefix
[0] == '\0')
20736 else if (cu
->language
== language_d
)
20738 /* For D, the 'main' function could be defined in any module, but it
20739 should never be prefixed. */
20740 if (strcmp (suffix
, "D main") == 0)
20748 else if (cu
->language
== language_fortran
&& physname
)
20750 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
20751 DW_AT_MIPS_linkage_name is preferred and used instead. */
20759 if (prefix
== NULL
)
20761 if (suffix
== NULL
)
20768 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
20770 strcpy (retval
, lead
);
20771 strcat (retval
, prefix
);
20772 strcat (retval
, sep
);
20773 strcat (retval
, suffix
);
20778 /* We have an obstack. */
20779 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
20783 /* Return sibling of die, NULL if no sibling. */
20785 static struct die_info
*
20786 sibling_die (struct die_info
*die
)
20788 return die
->sibling
;
20791 /* Get name of a die, return NULL if not found. */
20793 static const char *
20794 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
20795 struct obstack
*obstack
)
20797 if (name
&& cu
->language
== language_cplus
)
20799 std::string canon_name
= cp_canonicalize_string (name
);
20801 if (!canon_name
.empty ())
20803 if (canon_name
!= name
)
20804 name
= (const char *) obstack_copy0 (obstack
,
20805 canon_name
.c_str (),
20806 canon_name
.length ());
20813 /* Get name of a die, return NULL if not found.
20814 Anonymous namespaces are converted to their magic string. */
20816 static const char *
20817 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20819 struct attribute
*attr
;
20821 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
20822 if ((!attr
|| !DW_STRING (attr
))
20823 && die
->tag
!= DW_TAG_namespace
20824 && die
->tag
!= DW_TAG_class_type
20825 && die
->tag
!= DW_TAG_interface_type
20826 && die
->tag
!= DW_TAG_structure_type
20827 && die
->tag
!= DW_TAG_union_type
)
20832 case DW_TAG_compile_unit
:
20833 case DW_TAG_partial_unit
:
20834 /* Compilation units have a DW_AT_name that is a filename, not
20835 a source language identifier. */
20836 case DW_TAG_enumeration_type
:
20837 case DW_TAG_enumerator
:
20838 /* These tags always have simple identifiers already; no need
20839 to canonicalize them. */
20840 return DW_STRING (attr
);
20842 case DW_TAG_namespace
:
20843 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
20844 return DW_STRING (attr
);
20845 return CP_ANONYMOUS_NAMESPACE_STR
;
20847 case DW_TAG_class_type
:
20848 case DW_TAG_interface_type
:
20849 case DW_TAG_structure_type
:
20850 case DW_TAG_union_type
:
20851 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
20852 structures or unions. These were of the form "._%d" in GCC 4.1,
20853 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
20854 and GCC 4.4. We work around this problem by ignoring these. */
20855 if (attr
&& DW_STRING (attr
)
20856 && (startswith (DW_STRING (attr
), "._")
20857 || startswith (DW_STRING (attr
), "<anonymous")))
20860 /* GCC might emit a nameless typedef that has a linkage name. See
20861 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20862 if (!attr
|| DW_STRING (attr
) == NULL
)
20864 char *demangled
= NULL
;
20866 attr
= dw2_linkage_name_attr (die
, cu
);
20867 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20870 /* Avoid demangling DW_STRING (attr) the second time on a second
20871 call for the same DIE. */
20872 if (!DW_STRING_IS_CANONICAL (attr
))
20873 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
20879 /* FIXME: we already did this for the partial symbol... */
20882 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20883 demangled
, strlen (demangled
)));
20884 DW_STRING_IS_CANONICAL (attr
) = 1;
20887 /* Strip any leading namespaces/classes, keep only the base name.
20888 DW_AT_name for named DIEs does not contain the prefixes. */
20889 base
= strrchr (DW_STRING (attr
), ':');
20890 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
20893 return DW_STRING (attr
);
20902 if (!DW_STRING_IS_CANONICAL (attr
))
20905 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
20906 &cu
->objfile
->per_bfd
->storage_obstack
);
20907 DW_STRING_IS_CANONICAL (attr
) = 1;
20909 return DW_STRING (attr
);
20912 /* Return the die that this die in an extension of, or NULL if there
20913 is none. *EXT_CU is the CU containing DIE on input, and the CU
20914 containing the return value on output. */
20916 static struct die_info
*
20917 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
20919 struct attribute
*attr
;
20921 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
20925 return follow_die_ref (die
, attr
, ext_cu
);
20928 /* Convert a DIE tag into its string name. */
20930 static const char *
20931 dwarf_tag_name (unsigned tag
)
20933 const char *name
= get_DW_TAG_name (tag
);
20936 return "DW_TAG_<unknown>";
20941 /* Convert a DWARF attribute code into its string name. */
20943 static const char *
20944 dwarf_attr_name (unsigned attr
)
20948 #ifdef MIPS /* collides with DW_AT_HP_block_index */
20949 if (attr
== DW_AT_MIPS_fde
)
20950 return "DW_AT_MIPS_fde";
20952 if (attr
== DW_AT_HP_block_index
)
20953 return "DW_AT_HP_block_index";
20956 name
= get_DW_AT_name (attr
);
20959 return "DW_AT_<unknown>";
20964 /* Convert a DWARF value form code into its string name. */
20966 static const char *
20967 dwarf_form_name (unsigned form
)
20969 const char *name
= get_DW_FORM_name (form
);
20972 return "DW_FORM_<unknown>";
20977 static const char *
20978 dwarf_bool_name (unsigned mybool
)
20986 /* Convert a DWARF type code into its string name. */
20988 static const char *
20989 dwarf_type_encoding_name (unsigned enc
)
20991 const char *name
= get_DW_ATE_name (enc
);
20994 return "DW_ATE_<unknown>";
21000 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21004 print_spaces (indent
, f
);
21005 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
21006 dwarf_tag_name (die
->tag
), die
->abbrev
,
21007 to_underlying (die
->sect_off
));
21009 if (die
->parent
!= NULL
)
21011 print_spaces (indent
, f
);
21012 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
21013 to_underlying (die
->parent
->sect_off
));
21016 print_spaces (indent
, f
);
21017 fprintf_unfiltered (f
, " has children: %s\n",
21018 dwarf_bool_name (die
->child
!= NULL
));
21020 print_spaces (indent
, f
);
21021 fprintf_unfiltered (f
, " attributes:\n");
21023 for (i
= 0; i
< die
->num_attrs
; ++i
)
21025 print_spaces (indent
, f
);
21026 fprintf_unfiltered (f
, " %s (%s) ",
21027 dwarf_attr_name (die
->attrs
[i
].name
),
21028 dwarf_form_name (die
->attrs
[i
].form
));
21030 switch (die
->attrs
[i
].form
)
21033 case DW_FORM_GNU_addr_index
:
21034 fprintf_unfiltered (f
, "address: ");
21035 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
21037 case DW_FORM_block2
:
21038 case DW_FORM_block4
:
21039 case DW_FORM_block
:
21040 case DW_FORM_block1
:
21041 fprintf_unfiltered (f
, "block: size %s",
21042 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21044 case DW_FORM_exprloc
:
21045 fprintf_unfiltered (f
, "expression: size %s",
21046 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
21048 case DW_FORM_data16
:
21049 fprintf_unfiltered (f
, "constant of 16 bytes");
21051 case DW_FORM_ref_addr
:
21052 fprintf_unfiltered (f
, "ref address: ");
21053 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21055 case DW_FORM_GNU_ref_alt
:
21056 fprintf_unfiltered (f
, "alt ref address: ");
21057 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
21063 case DW_FORM_ref_udata
:
21064 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
21065 (long) (DW_UNSND (&die
->attrs
[i
])));
21067 case DW_FORM_data1
:
21068 case DW_FORM_data2
:
21069 case DW_FORM_data4
:
21070 case DW_FORM_data8
:
21071 case DW_FORM_udata
:
21072 case DW_FORM_sdata
:
21073 fprintf_unfiltered (f
, "constant: %s",
21074 pulongest (DW_UNSND (&die
->attrs
[i
])));
21076 case DW_FORM_sec_offset
:
21077 fprintf_unfiltered (f
, "section offset: %s",
21078 pulongest (DW_UNSND (&die
->attrs
[i
])));
21080 case DW_FORM_ref_sig8
:
21081 fprintf_unfiltered (f
, "signature: %s",
21082 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
21084 case DW_FORM_string
:
21086 case DW_FORM_line_strp
:
21087 case DW_FORM_GNU_str_index
:
21088 case DW_FORM_GNU_strp_alt
:
21089 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
21090 DW_STRING (&die
->attrs
[i
])
21091 ? DW_STRING (&die
->attrs
[i
]) : "",
21092 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
21095 if (DW_UNSND (&die
->attrs
[i
]))
21096 fprintf_unfiltered (f
, "flag: TRUE");
21098 fprintf_unfiltered (f
, "flag: FALSE");
21100 case DW_FORM_flag_present
:
21101 fprintf_unfiltered (f
, "flag: TRUE");
21103 case DW_FORM_indirect
:
21104 /* The reader will have reduced the indirect form to
21105 the "base form" so this form should not occur. */
21106 fprintf_unfiltered (f
,
21107 "unexpected attribute form: DW_FORM_indirect");
21109 case DW_FORM_implicit_const
:
21110 fprintf_unfiltered (f
, "constant: %s",
21111 plongest (DW_SND (&die
->attrs
[i
])));
21114 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
21115 die
->attrs
[i
].form
);
21118 fprintf_unfiltered (f
, "\n");
21123 dump_die_for_error (struct die_info
*die
)
21125 dump_die_shallow (gdb_stderr
, 0, die
);
21129 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
21131 int indent
= level
* 4;
21133 gdb_assert (die
!= NULL
);
21135 if (level
>= max_level
)
21138 dump_die_shallow (f
, indent
, die
);
21140 if (die
->child
!= NULL
)
21142 print_spaces (indent
, f
);
21143 fprintf_unfiltered (f
, " Children:");
21144 if (level
+ 1 < max_level
)
21146 fprintf_unfiltered (f
, "\n");
21147 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
21151 fprintf_unfiltered (f
,
21152 " [not printed, max nesting level reached]\n");
21156 if (die
->sibling
!= NULL
&& level
> 0)
21158 dump_die_1 (f
, level
, max_level
, die
->sibling
);
21162 /* This is called from the pdie macro in gdbinit.in.
21163 It's not static so gcc will keep a copy callable from gdb. */
21166 dump_die (struct die_info
*die
, int max_level
)
21168 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
21172 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
21176 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
21177 to_underlying (die
->sect_off
),
21183 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
21187 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
21189 if (attr_form_is_ref (attr
))
21190 return (sect_offset
) DW_UNSND (attr
);
21192 complaint (&symfile_complaints
,
21193 _("unsupported die ref attribute form: '%s'"),
21194 dwarf_form_name (attr
->form
));
21198 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
21199 * the value held by the attribute is not constant. */
21202 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
21204 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
21205 return DW_SND (attr
);
21206 else if (attr
->form
== DW_FORM_udata
21207 || attr
->form
== DW_FORM_data1
21208 || attr
->form
== DW_FORM_data2
21209 || attr
->form
== DW_FORM_data4
21210 || attr
->form
== DW_FORM_data8
)
21211 return DW_UNSND (attr
);
21214 /* For DW_FORM_data16 see attr_form_is_constant. */
21215 complaint (&symfile_complaints
,
21216 _("Attribute value is not a constant (%s)"),
21217 dwarf_form_name (attr
->form
));
21218 return default_value
;
21222 /* Follow reference or signature attribute ATTR of SRC_DIE.
21223 On entry *REF_CU is the CU of SRC_DIE.
21224 On exit *REF_CU is the CU of the result. */
21226 static struct die_info
*
21227 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21228 struct dwarf2_cu
**ref_cu
)
21230 struct die_info
*die
;
21232 if (attr_form_is_ref (attr
))
21233 die
= follow_die_ref (src_die
, attr
, ref_cu
);
21234 else if (attr
->form
== DW_FORM_ref_sig8
)
21235 die
= follow_die_sig (src_die
, attr
, ref_cu
);
21238 dump_die_for_error (src_die
);
21239 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
21240 objfile_name ((*ref_cu
)->objfile
));
21246 /* Follow reference OFFSET.
21247 On entry *REF_CU is the CU of the source die referencing OFFSET.
21248 On exit *REF_CU is the CU of the result.
21249 Returns NULL if OFFSET is invalid. */
21251 static struct die_info
*
21252 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
21253 struct dwarf2_cu
**ref_cu
)
21255 struct die_info temp_die
;
21256 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
21258 gdb_assert (cu
->per_cu
!= NULL
);
21262 if (cu
->per_cu
->is_debug_types
)
21264 /* .debug_types CUs cannot reference anything outside their CU.
21265 If they need to, they have to reference a signatured type via
21266 DW_FORM_ref_sig8. */
21267 if (!offset_in_cu_p (&cu
->header
, sect_off
))
21270 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
21271 || !offset_in_cu_p (&cu
->header
, sect_off
))
21273 struct dwarf2_per_cu_data
*per_cu
;
21275 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
21278 /* If necessary, add it to the queue and load its DIEs. */
21279 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
21280 load_full_comp_unit (per_cu
, cu
->language
);
21282 target_cu
= per_cu
->cu
;
21284 else if (cu
->dies
== NULL
)
21286 /* We're loading full DIEs during partial symbol reading. */
21287 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
21288 load_full_comp_unit (cu
->per_cu
, language_minimal
);
21291 *ref_cu
= target_cu
;
21292 temp_die
.sect_off
= sect_off
;
21293 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
21295 to_underlying (sect_off
));
21298 /* Follow reference attribute ATTR of SRC_DIE.
21299 On entry *REF_CU is the CU of SRC_DIE.
21300 On exit *REF_CU is the CU of the result. */
21302 static struct die_info
*
21303 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
21304 struct dwarf2_cu
**ref_cu
)
21306 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21307 struct dwarf2_cu
*cu
= *ref_cu
;
21308 struct die_info
*die
;
21310 die
= follow_die_offset (sect_off
,
21311 (attr
->form
== DW_FORM_GNU_ref_alt
21312 || cu
->per_cu
->is_dwz
),
21315 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
21316 "at 0x%x [in module %s]"),
21317 to_underlying (sect_off
), to_underlying (src_die
->sect_off
),
21318 objfile_name (cu
->objfile
));
21323 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
21324 Returned value is intended for DW_OP_call*. Returned
21325 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
21327 struct dwarf2_locexpr_baton
21328 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
21329 struct dwarf2_per_cu_data
*per_cu
,
21330 CORE_ADDR (*get_frame_pc
) (void *baton
),
21333 struct dwarf2_cu
*cu
;
21334 struct die_info
*die
;
21335 struct attribute
*attr
;
21336 struct dwarf2_locexpr_baton retval
;
21338 dw2_setup (per_cu
->objfile
);
21340 if (per_cu
->cu
== NULL
)
21345 /* We shouldn't get here for a dummy CU, but don't crash on the user.
21346 Instead just throw an error, not much else we can do. */
21347 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
21348 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21351 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21353 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
21354 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21356 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21359 /* DWARF: "If there is no such attribute, then there is no effect.".
21360 DATA is ignored if SIZE is 0. */
21362 retval
.data
= NULL
;
21365 else if (attr_form_is_section_offset (attr
))
21367 struct dwarf2_loclist_baton loclist_baton
;
21368 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
21371 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
21373 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
21375 retval
.size
= size
;
21379 if (!attr_form_is_block (attr
))
21380 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
21381 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
21382 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21384 retval
.data
= DW_BLOCK (attr
)->data
;
21385 retval
.size
= DW_BLOCK (attr
)->size
;
21387 retval
.per_cu
= cu
->per_cu
;
21389 age_cached_comp_units ();
21394 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
21397 struct dwarf2_locexpr_baton
21398 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
21399 struct dwarf2_per_cu_data
*per_cu
,
21400 CORE_ADDR (*get_frame_pc
) (void *baton
),
21403 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
21405 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
21408 /* Write a constant of a given type as target-ordered bytes into
21411 static const gdb_byte
*
21412 write_constant_as_bytes (struct obstack
*obstack
,
21413 enum bfd_endian byte_order
,
21420 *len
= TYPE_LENGTH (type
);
21421 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
21422 store_unsigned_integer (result
, *len
, byte_order
, value
);
21427 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
21428 pointer to the constant bytes and set LEN to the length of the
21429 data. If memory is needed, allocate it on OBSTACK. If the DIE
21430 does not have a DW_AT_const_value, return NULL. */
21433 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
21434 struct dwarf2_per_cu_data
*per_cu
,
21435 struct obstack
*obstack
,
21438 struct dwarf2_cu
*cu
;
21439 struct die_info
*die
;
21440 struct attribute
*attr
;
21441 const gdb_byte
*result
= NULL
;
21444 enum bfd_endian byte_order
;
21446 dw2_setup (per_cu
->objfile
);
21448 if (per_cu
->cu
== NULL
)
21453 /* We shouldn't get here for a dummy CU, but don't crash on the user.
21454 Instead just throw an error, not much else we can do. */
21455 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
21456 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21459 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21461 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
21462 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
21465 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21469 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
21470 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21472 switch (attr
->form
)
21475 case DW_FORM_GNU_addr_index
:
21479 *len
= cu
->header
.addr_size
;
21480 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
21481 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
21485 case DW_FORM_string
:
21487 case DW_FORM_GNU_str_index
:
21488 case DW_FORM_GNU_strp_alt
:
21489 /* DW_STRING is already allocated on the objfile obstack, point
21491 result
= (const gdb_byte
*) DW_STRING (attr
);
21492 *len
= strlen (DW_STRING (attr
));
21494 case DW_FORM_block1
:
21495 case DW_FORM_block2
:
21496 case DW_FORM_block4
:
21497 case DW_FORM_block
:
21498 case DW_FORM_exprloc
:
21499 case DW_FORM_data16
:
21500 result
= DW_BLOCK (attr
)->data
;
21501 *len
= DW_BLOCK (attr
)->size
;
21504 /* The DW_AT_const_value attributes are supposed to carry the
21505 symbol's value "represented as it would be on the target
21506 architecture." By the time we get here, it's already been
21507 converted to host endianness, so we just need to sign- or
21508 zero-extend it as appropriate. */
21509 case DW_FORM_data1
:
21510 type
= die_type (die
, cu
);
21511 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
21512 if (result
== NULL
)
21513 result
= write_constant_as_bytes (obstack
, byte_order
,
21516 case DW_FORM_data2
:
21517 type
= die_type (die
, cu
);
21518 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
21519 if (result
== NULL
)
21520 result
= write_constant_as_bytes (obstack
, byte_order
,
21523 case DW_FORM_data4
:
21524 type
= die_type (die
, cu
);
21525 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
21526 if (result
== NULL
)
21527 result
= write_constant_as_bytes (obstack
, byte_order
,
21530 case DW_FORM_data8
:
21531 type
= die_type (die
, cu
);
21532 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
21533 if (result
== NULL
)
21534 result
= write_constant_as_bytes (obstack
, byte_order
,
21538 case DW_FORM_sdata
:
21539 case DW_FORM_implicit_const
:
21540 type
= die_type (die
, cu
);
21541 result
= write_constant_as_bytes (obstack
, byte_order
,
21542 type
, DW_SND (attr
), len
);
21545 case DW_FORM_udata
:
21546 type
= die_type (die
, cu
);
21547 result
= write_constant_as_bytes (obstack
, byte_order
,
21548 type
, DW_UNSND (attr
), len
);
21552 complaint (&symfile_complaints
,
21553 _("unsupported const value attribute form: '%s'"),
21554 dwarf_form_name (attr
->form
));
21561 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
21562 valid type for this die is found. */
21565 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
21566 struct dwarf2_per_cu_data
*per_cu
)
21568 struct dwarf2_cu
*cu
;
21569 struct die_info
*die
;
21571 dw2_setup (per_cu
->objfile
);
21573 if (per_cu
->cu
== NULL
)
21579 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21583 return die_type (die
, cu
);
21586 /* Return the type of the DIE at DIE_OFFSET in the CU named by
21590 dwarf2_get_die_type (cu_offset die_offset
,
21591 struct dwarf2_per_cu_data
*per_cu
)
21593 dw2_setup (per_cu
->objfile
);
21595 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
21596 return get_die_type_at_offset (die_offset_sect
, per_cu
);
21599 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
21600 On entry *REF_CU is the CU of SRC_DIE.
21601 On exit *REF_CU is the CU of the result.
21602 Returns NULL if the referenced DIE isn't found. */
21604 static struct die_info
*
21605 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
21606 struct dwarf2_cu
**ref_cu
)
21608 struct die_info temp_die
;
21609 struct dwarf2_cu
*sig_cu
;
21610 struct die_info
*die
;
21612 /* While it might be nice to assert sig_type->type == NULL here,
21613 we can get here for DW_AT_imported_declaration where we need
21614 the DIE not the type. */
21616 /* If necessary, add it to the queue and load its DIEs. */
21618 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
21619 read_signatured_type (sig_type
);
21621 sig_cu
= sig_type
->per_cu
.cu
;
21622 gdb_assert (sig_cu
!= NULL
);
21623 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
21624 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
21625 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
21626 to_underlying (temp_die
.sect_off
));
21629 /* For .gdb_index version 7 keep track of included TUs.
21630 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
21631 if (dwarf2_per_objfile
->index_table
!= NULL
21632 && dwarf2_per_objfile
->index_table
->version
<= 7)
21634 VEC_safe_push (dwarf2_per_cu_ptr
,
21635 (*ref_cu
)->per_cu
->imported_symtabs
,
21646 /* Follow signatured type referenced by ATTR in SRC_DIE.
21647 On entry *REF_CU is the CU of SRC_DIE.
21648 On exit *REF_CU is the CU of the result.
21649 The result is the DIE of the type.
21650 If the referenced type cannot be found an error is thrown. */
21652 static struct die_info
*
21653 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21654 struct dwarf2_cu
**ref_cu
)
21656 ULONGEST signature
= DW_SIGNATURE (attr
);
21657 struct signatured_type
*sig_type
;
21658 struct die_info
*die
;
21660 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
21662 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
21663 /* sig_type will be NULL if the signatured type is missing from
21665 if (sig_type
== NULL
)
21667 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
21668 " from DIE at 0x%x [in module %s]"),
21669 hex_string (signature
), to_underlying (src_die
->sect_off
),
21670 objfile_name ((*ref_cu
)->objfile
));
21673 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
21676 dump_die_for_error (src_die
);
21677 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
21678 " from DIE at 0x%x [in module %s]"),
21679 hex_string (signature
), to_underlying (src_die
->sect_off
),
21680 objfile_name ((*ref_cu
)->objfile
));
21686 /* Get the type specified by SIGNATURE referenced in DIE/CU,
21687 reading in and processing the type unit if necessary. */
21689 static struct type
*
21690 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
21691 struct dwarf2_cu
*cu
)
21693 struct signatured_type
*sig_type
;
21694 struct dwarf2_cu
*type_cu
;
21695 struct die_info
*type_die
;
21698 sig_type
= lookup_signatured_type (cu
, signature
);
21699 /* sig_type will be NULL if the signatured type is missing from
21701 if (sig_type
== NULL
)
21703 complaint (&symfile_complaints
,
21704 _("Dwarf Error: Cannot find signatured DIE %s referenced"
21705 " from DIE at 0x%x [in module %s]"),
21706 hex_string (signature
), to_underlying (die
->sect_off
),
21707 objfile_name (dwarf2_per_objfile
->objfile
));
21708 return build_error_marker_type (cu
, die
);
21711 /* If we already know the type we're done. */
21712 if (sig_type
->type
!= NULL
)
21713 return sig_type
->type
;
21716 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
21717 if (type_die
!= NULL
)
21719 /* N.B. We need to call get_die_type to ensure only one type for this DIE
21720 is created. This is important, for example, because for c++ classes
21721 we need TYPE_NAME set which is only done by new_symbol. Blech. */
21722 type
= read_type_die (type_die
, type_cu
);
21725 complaint (&symfile_complaints
,
21726 _("Dwarf Error: Cannot build signatured type %s"
21727 " referenced from DIE at 0x%x [in module %s]"),
21728 hex_string (signature
), to_underlying (die
->sect_off
),
21729 objfile_name (dwarf2_per_objfile
->objfile
));
21730 type
= build_error_marker_type (cu
, die
);
21735 complaint (&symfile_complaints
,
21736 _("Dwarf Error: Problem reading signatured DIE %s referenced"
21737 " from DIE at 0x%x [in module %s]"),
21738 hex_string (signature
), to_underlying (die
->sect_off
),
21739 objfile_name (dwarf2_per_objfile
->objfile
));
21740 type
= build_error_marker_type (cu
, die
);
21742 sig_type
->type
= type
;
21747 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
21748 reading in and processing the type unit if necessary. */
21750 static struct type
*
21751 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
21752 struct dwarf2_cu
*cu
) /* ARI: editCase function */
21754 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
21755 if (attr_form_is_ref (attr
))
21757 struct dwarf2_cu
*type_cu
= cu
;
21758 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
21760 return read_type_die (type_die
, type_cu
);
21762 else if (attr
->form
== DW_FORM_ref_sig8
)
21764 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
21768 complaint (&symfile_complaints
,
21769 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
21770 " at 0x%x [in module %s]"),
21771 dwarf_form_name (attr
->form
), to_underlying (die
->sect_off
),
21772 objfile_name (dwarf2_per_objfile
->objfile
));
21773 return build_error_marker_type (cu
, die
);
21777 /* Load the DIEs associated with type unit PER_CU into memory. */
21780 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
21782 struct signatured_type
*sig_type
;
21784 /* Caller is responsible for ensuring type_unit_groups don't get here. */
21785 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
21787 /* We have the per_cu, but we need the signatured_type.
21788 Fortunately this is an easy translation. */
21789 gdb_assert (per_cu
->is_debug_types
);
21790 sig_type
= (struct signatured_type
*) per_cu
;
21792 gdb_assert (per_cu
->cu
== NULL
);
21794 read_signatured_type (sig_type
);
21796 gdb_assert (per_cu
->cu
!= NULL
);
21799 /* die_reader_func for read_signatured_type.
21800 This is identical to load_full_comp_unit_reader,
21801 but is kept separate for now. */
21804 read_signatured_type_reader (const struct die_reader_specs
*reader
,
21805 const gdb_byte
*info_ptr
,
21806 struct die_info
*comp_unit_die
,
21810 struct dwarf2_cu
*cu
= reader
->cu
;
21812 gdb_assert (cu
->die_hash
== NULL
);
21814 htab_create_alloc_ex (cu
->header
.length
/ 12,
21818 &cu
->comp_unit_obstack
,
21819 hashtab_obstack_allocate
,
21820 dummy_obstack_deallocate
);
21823 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
21824 &info_ptr
, comp_unit_die
);
21825 cu
->dies
= comp_unit_die
;
21826 /* comp_unit_die is not stored in die_hash, no need. */
21828 /* We try not to read any attributes in this function, because not
21829 all CUs needed for references have been loaded yet, and symbol
21830 table processing isn't initialized. But we have to set the CU language,
21831 or we won't be able to build types correctly.
21832 Similarly, if we do not read the producer, we can not apply
21833 producer-specific interpretation. */
21834 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
21837 /* Read in a signatured type and build its CU and DIEs.
21838 If the type is a stub for the real type in a DWO file,
21839 read in the real type from the DWO file as well. */
21842 read_signatured_type (struct signatured_type
*sig_type
)
21844 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
21846 gdb_assert (per_cu
->is_debug_types
);
21847 gdb_assert (per_cu
->cu
== NULL
);
21849 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
21850 read_signatured_type_reader
, NULL
);
21851 sig_type
->per_cu
.tu_read
= 1;
21854 /* Decode simple location descriptions.
21855 Given a pointer to a dwarf block that defines a location, compute
21856 the location and return the value.
21858 NOTE drow/2003-11-18: This function is called in two situations
21859 now: for the address of static or global variables (partial symbols
21860 only) and for offsets into structures which are expected to be
21861 (more or less) constant. The partial symbol case should go away,
21862 and only the constant case should remain. That will let this
21863 function complain more accurately. A few special modes are allowed
21864 without complaint for global variables (for instance, global
21865 register values and thread-local values).
21867 A location description containing no operations indicates that the
21868 object is optimized out. The return value is 0 for that case.
21869 FIXME drow/2003-11-16: No callers check for this case any more; soon all
21870 callers will only want a very basic result and this can become a
21873 Note that stack[0] is unused except as a default error return. */
21876 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
21878 struct objfile
*objfile
= cu
->objfile
;
21880 size_t size
= blk
->size
;
21881 const gdb_byte
*data
= blk
->data
;
21882 CORE_ADDR stack
[64];
21884 unsigned int bytes_read
, unsnd
;
21890 stack
[++stacki
] = 0;
21929 stack
[++stacki
] = op
- DW_OP_lit0
;
21964 stack
[++stacki
] = op
- DW_OP_reg0
;
21966 dwarf2_complex_location_expr_complaint ();
21970 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
21972 stack
[++stacki
] = unsnd
;
21974 dwarf2_complex_location_expr_complaint ();
21978 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
21983 case DW_OP_const1u
:
21984 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
21988 case DW_OP_const1s
:
21989 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
21993 case DW_OP_const2u
:
21994 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
21998 case DW_OP_const2s
:
21999 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22003 case DW_OP_const4u
:
22004 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22008 case DW_OP_const4s
:
22009 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22013 case DW_OP_const8u
:
22014 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22019 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
22025 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
22030 stack
[stacki
+ 1] = stack
[stacki
];
22035 stack
[stacki
- 1] += stack
[stacki
];
22039 case DW_OP_plus_uconst
:
22040 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
22046 stack
[stacki
- 1] -= stack
[stacki
];
22051 /* If we're not the last op, then we definitely can't encode
22052 this using GDB's address_class enum. This is valid for partial
22053 global symbols, although the variable's address will be bogus
22056 dwarf2_complex_location_expr_complaint ();
22059 case DW_OP_GNU_push_tls_address
:
22060 case DW_OP_form_tls_address
:
22061 /* The top of the stack has the offset from the beginning
22062 of the thread control block at which the variable is located. */
22063 /* Nothing should follow this operator, so the top of stack would
22065 /* This is valid for partial global symbols, but the variable's
22066 address will be bogus in the psymtab. Make it always at least
22067 non-zero to not look as a variable garbage collected by linker
22068 which have DW_OP_addr 0. */
22070 dwarf2_complex_location_expr_complaint ();
22074 case DW_OP_GNU_uninit
:
22077 case DW_OP_GNU_addr_index
:
22078 case DW_OP_GNU_const_index
:
22079 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
22086 const char *name
= get_DW_OP_name (op
);
22089 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
22092 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
22096 return (stack
[stacki
]);
22099 /* Enforce maximum stack depth of SIZE-1 to avoid writing
22100 outside of the allocated space. Also enforce minimum>0. */
22101 if (stacki
>= ARRAY_SIZE (stack
) - 1)
22103 complaint (&symfile_complaints
,
22104 _("location description stack overflow"));
22110 complaint (&symfile_complaints
,
22111 _("location description stack underflow"));
22115 return (stack
[stacki
]);
22118 /* memory allocation interface */
22120 static struct dwarf_block
*
22121 dwarf_alloc_block (struct dwarf2_cu
*cu
)
22123 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
22126 static struct die_info
*
22127 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
22129 struct die_info
*die
;
22130 size_t size
= sizeof (struct die_info
);
22133 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
22135 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
22136 memset (die
, 0, sizeof (struct die_info
));
22141 /* Macro support. */
22143 /* Return file name relative to the compilation directory of file number I in
22144 *LH's file name table. The result is allocated using xmalloc; the caller is
22145 responsible for freeing it. */
22148 file_file_name (int file
, struct line_header
*lh
)
22150 /* Is the file number a valid index into the line header's file name
22151 table? Remember that file numbers start with one, not zero. */
22152 if (1 <= file
&& file
<= lh
->file_names
.size ())
22154 const file_entry
&fe
= lh
->file_names
[file
- 1];
22156 if (!IS_ABSOLUTE_PATH (fe
.name
))
22158 const char *dir
= fe
.include_dir (lh
);
22160 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
22162 return xstrdup (fe
.name
);
22166 /* The compiler produced a bogus file number. We can at least
22167 record the macro definitions made in the file, even if we
22168 won't be able to find the file by name. */
22169 char fake_name
[80];
22171 xsnprintf (fake_name
, sizeof (fake_name
),
22172 "<bad macro file number %d>", file
);
22174 complaint (&symfile_complaints
,
22175 _("bad file number in macro information (%d)"),
22178 return xstrdup (fake_name
);
22182 /* Return the full name of file number I in *LH's file name table.
22183 Use COMP_DIR as the name of the current directory of the
22184 compilation. The result is allocated using xmalloc; the caller is
22185 responsible for freeing it. */
22187 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
22189 /* Is the file number a valid index into the line header's file name
22190 table? Remember that file numbers start with one, not zero. */
22191 if (1 <= file
&& file
<= lh
->file_names
.size ())
22193 char *relative
= file_file_name (file
, lh
);
22195 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
22197 return reconcat (relative
, comp_dir
, SLASH_STRING
,
22198 relative
, (char *) NULL
);
22201 return file_file_name (file
, lh
);
22205 static struct macro_source_file
*
22206 macro_start_file (int file
, int line
,
22207 struct macro_source_file
*current_file
,
22208 struct line_header
*lh
)
22210 /* File name relative to the compilation directory of this source file. */
22211 char *file_name
= file_file_name (file
, lh
);
22213 if (! current_file
)
22215 /* Note: We don't create a macro table for this compilation unit
22216 at all until we actually get a filename. */
22217 struct macro_table
*macro_table
= get_macro_table ();
22219 /* If we have no current file, then this must be the start_file
22220 directive for the compilation unit's main source file. */
22221 current_file
= macro_set_main (macro_table
, file_name
);
22222 macro_define_special (macro_table
);
22225 current_file
= macro_include (current_file
, line
, file_name
);
22229 return current_file
;
22232 static const char *
22233 consume_improper_spaces (const char *p
, const char *body
)
22237 complaint (&symfile_complaints
,
22238 _("macro definition contains spaces "
22239 "in formal argument list:\n`%s'"),
22251 parse_macro_definition (struct macro_source_file
*file
, int line
,
22256 /* The body string takes one of two forms. For object-like macro
22257 definitions, it should be:
22259 <macro name> " " <definition>
22261 For function-like macro definitions, it should be:
22263 <macro name> "() " <definition>
22265 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
22267 Spaces may appear only where explicitly indicated, and in the
22270 The Dwarf 2 spec says that an object-like macro's name is always
22271 followed by a space, but versions of GCC around March 2002 omit
22272 the space when the macro's definition is the empty string.
22274 The Dwarf 2 spec says that there should be no spaces between the
22275 formal arguments in a function-like macro's formal argument list,
22276 but versions of GCC around March 2002 include spaces after the
22280 /* Find the extent of the macro name. The macro name is terminated
22281 by either a space or null character (for an object-like macro) or
22282 an opening paren (for a function-like macro). */
22283 for (p
= body
; *p
; p
++)
22284 if (*p
== ' ' || *p
== '(')
22287 if (*p
== ' ' || *p
== '\0')
22289 /* It's an object-like macro. */
22290 int name_len
= p
- body
;
22291 char *name
= savestring (body
, name_len
);
22292 const char *replacement
;
22295 replacement
= body
+ name_len
+ 1;
22298 dwarf2_macro_malformed_definition_complaint (body
);
22299 replacement
= body
+ name_len
;
22302 macro_define_object (file
, line
, name
, replacement
);
22306 else if (*p
== '(')
22308 /* It's a function-like macro. */
22309 char *name
= savestring (body
, p
- body
);
22312 char **argv
= XNEWVEC (char *, argv_size
);
22316 p
= consume_improper_spaces (p
, body
);
22318 /* Parse the formal argument list. */
22319 while (*p
&& *p
!= ')')
22321 /* Find the extent of the current argument name. */
22322 const char *arg_start
= p
;
22324 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
22327 if (! *p
|| p
== arg_start
)
22328 dwarf2_macro_malformed_definition_complaint (body
);
22331 /* Make sure argv has room for the new argument. */
22332 if (argc
>= argv_size
)
22335 argv
= XRESIZEVEC (char *, argv
, argv_size
);
22338 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
22341 p
= consume_improper_spaces (p
, body
);
22343 /* Consume the comma, if present. */
22348 p
= consume_improper_spaces (p
, body
);
22357 /* Perfectly formed definition, no complaints. */
22358 macro_define_function (file
, line
, name
,
22359 argc
, (const char **) argv
,
22361 else if (*p
== '\0')
22363 /* Complain, but do define it. */
22364 dwarf2_macro_malformed_definition_complaint (body
);
22365 macro_define_function (file
, line
, name
,
22366 argc
, (const char **) argv
,
22370 /* Just complain. */
22371 dwarf2_macro_malformed_definition_complaint (body
);
22374 /* Just complain. */
22375 dwarf2_macro_malformed_definition_complaint (body
);
22381 for (i
= 0; i
< argc
; i
++)
22387 dwarf2_macro_malformed_definition_complaint (body
);
22390 /* Skip some bytes from BYTES according to the form given in FORM.
22391 Returns the new pointer. */
22393 static const gdb_byte
*
22394 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
22395 enum dwarf_form form
,
22396 unsigned int offset_size
,
22397 struct dwarf2_section_info
*section
)
22399 unsigned int bytes_read
;
22403 case DW_FORM_data1
:
22408 case DW_FORM_data2
:
22412 case DW_FORM_data4
:
22416 case DW_FORM_data8
:
22420 case DW_FORM_data16
:
22424 case DW_FORM_string
:
22425 read_direct_string (abfd
, bytes
, &bytes_read
);
22426 bytes
+= bytes_read
;
22429 case DW_FORM_sec_offset
:
22431 case DW_FORM_GNU_strp_alt
:
22432 bytes
+= offset_size
;
22435 case DW_FORM_block
:
22436 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
22437 bytes
+= bytes_read
;
22440 case DW_FORM_block1
:
22441 bytes
+= 1 + read_1_byte (abfd
, bytes
);
22443 case DW_FORM_block2
:
22444 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
22446 case DW_FORM_block4
:
22447 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
22450 case DW_FORM_sdata
:
22451 case DW_FORM_udata
:
22452 case DW_FORM_GNU_addr_index
:
22453 case DW_FORM_GNU_str_index
:
22454 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
22457 dwarf2_section_buffer_overflow_complaint (section
);
22462 case DW_FORM_implicit_const
:
22468 complaint (&symfile_complaints
,
22469 _("invalid form 0x%x in `%s'"),
22470 form
, get_section_name (section
));
22478 /* A helper for dwarf_decode_macros that handles skipping an unknown
22479 opcode. Returns an updated pointer to the macro data buffer; or,
22480 on error, issues a complaint and returns NULL. */
22482 static const gdb_byte
*
22483 skip_unknown_opcode (unsigned int opcode
,
22484 const gdb_byte
**opcode_definitions
,
22485 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22487 unsigned int offset_size
,
22488 struct dwarf2_section_info
*section
)
22490 unsigned int bytes_read
, i
;
22492 const gdb_byte
*defn
;
22494 if (opcode_definitions
[opcode
] == NULL
)
22496 complaint (&symfile_complaints
,
22497 _("unrecognized DW_MACFINO opcode 0x%x"),
22502 defn
= opcode_definitions
[opcode
];
22503 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
22504 defn
+= bytes_read
;
22506 for (i
= 0; i
< arg
; ++i
)
22508 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
22509 (enum dwarf_form
) defn
[i
], offset_size
,
22511 if (mac_ptr
== NULL
)
22513 /* skip_form_bytes already issued the complaint. */
22521 /* A helper function which parses the header of a macro section.
22522 If the macro section is the extended (for now called "GNU") type,
22523 then this updates *OFFSET_SIZE. Returns a pointer to just after
22524 the header, or issues a complaint and returns NULL on error. */
22526 static const gdb_byte
*
22527 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
22529 const gdb_byte
*mac_ptr
,
22530 unsigned int *offset_size
,
22531 int section_is_gnu
)
22533 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
22535 if (section_is_gnu
)
22537 unsigned int version
, flags
;
22539 version
= read_2_bytes (abfd
, mac_ptr
);
22540 if (version
!= 4 && version
!= 5)
22542 complaint (&symfile_complaints
,
22543 _("unrecognized version `%d' in .debug_macro section"),
22549 flags
= read_1_byte (abfd
, mac_ptr
);
22551 *offset_size
= (flags
& 1) ? 8 : 4;
22553 if ((flags
& 2) != 0)
22554 /* We don't need the line table offset. */
22555 mac_ptr
+= *offset_size
;
22557 /* Vendor opcode descriptions. */
22558 if ((flags
& 4) != 0)
22560 unsigned int i
, count
;
22562 count
= read_1_byte (abfd
, mac_ptr
);
22564 for (i
= 0; i
< count
; ++i
)
22566 unsigned int opcode
, bytes_read
;
22569 opcode
= read_1_byte (abfd
, mac_ptr
);
22571 opcode_definitions
[opcode
] = mac_ptr
;
22572 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22573 mac_ptr
+= bytes_read
;
22582 /* A helper for dwarf_decode_macros that handles the GNU extensions,
22583 including DW_MACRO_import. */
22586 dwarf_decode_macro_bytes (bfd
*abfd
,
22587 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22588 struct macro_source_file
*current_file
,
22589 struct line_header
*lh
,
22590 struct dwarf2_section_info
*section
,
22591 int section_is_gnu
, int section_is_dwz
,
22592 unsigned int offset_size
,
22593 htab_t include_hash
)
22595 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22596 enum dwarf_macro_record_type macinfo_type
;
22597 int at_commandline
;
22598 const gdb_byte
*opcode_definitions
[256];
22600 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22601 &offset_size
, section_is_gnu
);
22602 if (mac_ptr
== NULL
)
22604 /* We already issued a complaint. */
22608 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
22609 GDB is still reading the definitions from command line. First
22610 DW_MACINFO_start_file will need to be ignored as it was already executed
22611 to create CURRENT_FILE for the main source holding also the command line
22612 definitions. On first met DW_MACINFO_start_file this flag is reset to
22613 normally execute all the remaining DW_MACINFO_start_file macinfos. */
22615 at_commandline
= 1;
22619 /* Do we at least have room for a macinfo type byte? */
22620 if (mac_ptr
>= mac_end
)
22622 dwarf2_section_buffer_overflow_complaint (section
);
22626 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22629 /* Note that we rely on the fact that the corresponding GNU and
22630 DWARF constants are the same. */
22631 switch (macinfo_type
)
22633 /* A zero macinfo type indicates the end of the macro
22638 case DW_MACRO_define
:
22639 case DW_MACRO_undef
:
22640 case DW_MACRO_define_strp
:
22641 case DW_MACRO_undef_strp
:
22642 case DW_MACRO_define_sup
:
22643 case DW_MACRO_undef_sup
:
22645 unsigned int bytes_read
;
22650 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22651 mac_ptr
+= bytes_read
;
22653 if (macinfo_type
== DW_MACRO_define
22654 || macinfo_type
== DW_MACRO_undef
)
22656 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22657 mac_ptr
+= bytes_read
;
22661 LONGEST str_offset
;
22663 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22664 mac_ptr
+= offset_size
;
22666 if (macinfo_type
== DW_MACRO_define_sup
22667 || macinfo_type
== DW_MACRO_undef_sup
22670 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22672 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
22675 body
= read_indirect_string_at_offset (abfd
, str_offset
);
22678 is_define
= (macinfo_type
== DW_MACRO_define
22679 || macinfo_type
== DW_MACRO_define_strp
22680 || macinfo_type
== DW_MACRO_define_sup
);
22681 if (! current_file
)
22683 /* DWARF violation as no main source is present. */
22684 complaint (&symfile_complaints
,
22685 _("debug info with no main source gives macro %s "
22687 is_define
? _("definition") : _("undefinition"),
22691 if ((line
== 0 && !at_commandline
)
22692 || (line
!= 0 && at_commandline
))
22693 complaint (&symfile_complaints
,
22694 _("debug info gives %s macro %s with %s line %d: %s"),
22695 at_commandline
? _("command-line") : _("in-file"),
22696 is_define
? _("definition") : _("undefinition"),
22697 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
22700 parse_macro_definition (current_file
, line
, body
);
22703 gdb_assert (macinfo_type
== DW_MACRO_undef
22704 || macinfo_type
== DW_MACRO_undef_strp
22705 || macinfo_type
== DW_MACRO_undef_sup
);
22706 macro_undef (current_file
, line
, body
);
22711 case DW_MACRO_start_file
:
22713 unsigned int bytes_read
;
22716 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22717 mac_ptr
+= bytes_read
;
22718 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22719 mac_ptr
+= bytes_read
;
22721 if ((line
== 0 && !at_commandline
)
22722 || (line
!= 0 && at_commandline
))
22723 complaint (&symfile_complaints
,
22724 _("debug info gives source %d included "
22725 "from %s at %s line %d"),
22726 file
, at_commandline
? _("command-line") : _("file"),
22727 line
== 0 ? _("zero") : _("non-zero"), line
);
22729 if (at_commandline
)
22731 /* This DW_MACRO_start_file was executed in the
22733 at_commandline
= 0;
22736 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22740 case DW_MACRO_end_file
:
22741 if (! current_file
)
22742 complaint (&symfile_complaints
,
22743 _("macro debug info has an unmatched "
22744 "`close_file' directive"));
22747 current_file
= current_file
->included_by
;
22748 if (! current_file
)
22750 enum dwarf_macro_record_type next_type
;
22752 /* GCC circa March 2002 doesn't produce the zero
22753 type byte marking the end of the compilation
22754 unit. Complain if it's not there, but exit no
22757 /* Do we at least have room for a macinfo type byte? */
22758 if (mac_ptr
>= mac_end
)
22760 dwarf2_section_buffer_overflow_complaint (section
);
22764 /* We don't increment mac_ptr here, so this is just
22767 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
22769 if (next_type
!= 0)
22770 complaint (&symfile_complaints
,
22771 _("no terminating 0-type entry for "
22772 "macros in `.debug_macinfo' section"));
22779 case DW_MACRO_import
:
22780 case DW_MACRO_import_sup
:
22784 bfd
*include_bfd
= abfd
;
22785 struct dwarf2_section_info
*include_section
= section
;
22786 const gdb_byte
*include_mac_end
= mac_end
;
22787 int is_dwz
= section_is_dwz
;
22788 const gdb_byte
*new_mac_ptr
;
22790 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22791 mac_ptr
+= offset_size
;
22793 if (macinfo_type
== DW_MACRO_import_sup
)
22795 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22797 dwarf2_read_section (objfile
, &dwz
->macro
);
22799 include_section
= &dwz
->macro
;
22800 include_bfd
= get_section_bfd_owner (include_section
);
22801 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
22805 new_mac_ptr
= include_section
->buffer
+ offset
;
22806 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
22810 /* This has actually happened; see
22811 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
22812 complaint (&symfile_complaints
,
22813 _("recursive DW_MACRO_import in "
22814 ".debug_macro section"));
22818 *slot
= (void *) new_mac_ptr
;
22820 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
22821 include_mac_end
, current_file
, lh
,
22822 section
, section_is_gnu
, is_dwz
,
22823 offset_size
, include_hash
);
22825 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
22830 case DW_MACINFO_vendor_ext
:
22831 if (!section_is_gnu
)
22833 unsigned int bytes_read
;
22835 /* This reads the constant, but since we don't recognize
22836 any vendor extensions, we ignore it. */
22837 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22838 mac_ptr
+= bytes_read
;
22839 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22840 mac_ptr
+= bytes_read
;
22842 /* We don't recognize any vendor extensions. */
22848 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22849 mac_ptr
, mac_end
, abfd
, offset_size
,
22851 if (mac_ptr
== NULL
)
22855 } while (macinfo_type
!= 0);
22859 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22860 int section_is_gnu
)
22862 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22863 struct line_header
*lh
= cu
->line_header
;
22865 const gdb_byte
*mac_ptr
, *mac_end
;
22866 struct macro_source_file
*current_file
= 0;
22867 enum dwarf_macro_record_type macinfo_type
;
22868 unsigned int offset_size
= cu
->header
.offset_size
;
22869 const gdb_byte
*opcode_definitions
[256];
22871 struct dwarf2_section_info
*section
;
22872 const char *section_name
;
22874 if (cu
->dwo_unit
!= NULL
)
22876 if (section_is_gnu
)
22878 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22879 section_name
= ".debug_macro.dwo";
22883 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22884 section_name
= ".debug_macinfo.dwo";
22889 if (section_is_gnu
)
22891 section
= &dwarf2_per_objfile
->macro
;
22892 section_name
= ".debug_macro";
22896 section
= &dwarf2_per_objfile
->macinfo
;
22897 section_name
= ".debug_macinfo";
22901 dwarf2_read_section (objfile
, section
);
22902 if (section
->buffer
== NULL
)
22904 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
22907 abfd
= get_section_bfd_owner (section
);
22909 /* First pass: Find the name of the base filename.
22910 This filename is needed in order to process all macros whose definition
22911 (or undefinition) comes from the command line. These macros are defined
22912 before the first DW_MACINFO_start_file entry, and yet still need to be
22913 associated to the base file.
22915 To determine the base file name, we scan the macro definitions until we
22916 reach the first DW_MACINFO_start_file entry. We then initialize
22917 CURRENT_FILE accordingly so that any macro definition found before the
22918 first DW_MACINFO_start_file can still be associated to the base file. */
22920 mac_ptr
= section
->buffer
+ offset
;
22921 mac_end
= section
->buffer
+ section
->size
;
22923 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22924 &offset_size
, section_is_gnu
);
22925 if (mac_ptr
== NULL
)
22927 /* We already issued a complaint. */
22933 /* Do we at least have room for a macinfo type byte? */
22934 if (mac_ptr
>= mac_end
)
22936 /* Complaint is printed during the second pass as GDB will probably
22937 stop the first pass earlier upon finding
22938 DW_MACINFO_start_file. */
22942 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22945 /* Note that we rely on the fact that the corresponding GNU and
22946 DWARF constants are the same. */
22947 switch (macinfo_type
)
22949 /* A zero macinfo type indicates the end of the macro
22954 case DW_MACRO_define
:
22955 case DW_MACRO_undef
:
22956 /* Only skip the data by MAC_PTR. */
22958 unsigned int bytes_read
;
22960 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22961 mac_ptr
+= bytes_read
;
22962 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22963 mac_ptr
+= bytes_read
;
22967 case DW_MACRO_start_file
:
22969 unsigned int bytes_read
;
22972 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22973 mac_ptr
+= bytes_read
;
22974 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22975 mac_ptr
+= bytes_read
;
22977 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22981 case DW_MACRO_end_file
:
22982 /* No data to skip by MAC_PTR. */
22985 case DW_MACRO_define_strp
:
22986 case DW_MACRO_undef_strp
:
22987 case DW_MACRO_define_sup
:
22988 case DW_MACRO_undef_sup
:
22990 unsigned int bytes_read
;
22992 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22993 mac_ptr
+= bytes_read
;
22994 mac_ptr
+= offset_size
;
22998 case DW_MACRO_import
:
22999 case DW_MACRO_import_sup
:
23000 /* Note that, according to the spec, a transparent include
23001 chain cannot call DW_MACRO_start_file. So, we can just
23002 skip this opcode. */
23003 mac_ptr
+= offset_size
;
23006 case DW_MACINFO_vendor_ext
:
23007 /* Only skip the data by MAC_PTR. */
23008 if (!section_is_gnu
)
23010 unsigned int bytes_read
;
23012 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
23013 mac_ptr
+= bytes_read
;
23014 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
23015 mac_ptr
+= bytes_read
;
23020 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
23021 mac_ptr
, mac_end
, abfd
, offset_size
,
23023 if (mac_ptr
== NULL
)
23027 } while (macinfo_type
!= 0 && current_file
== NULL
);
23029 /* Second pass: Process all entries.
23031 Use the AT_COMMAND_LINE flag to determine whether we are still processing
23032 command-line macro definitions/undefinitions. This flag is unset when we
23033 reach the first DW_MACINFO_start_file entry. */
23035 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
23037 NULL
, xcalloc
, xfree
));
23038 mac_ptr
= section
->buffer
+ offset
;
23039 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
23040 *slot
= (void *) mac_ptr
;
23041 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
23042 current_file
, lh
, section
,
23043 section_is_gnu
, 0, offset_size
,
23044 include_hash
.get ());
23047 /* Check if the attribute's form is a DW_FORM_block*
23048 if so return true else false. */
23051 attr_form_is_block (const struct attribute
*attr
)
23053 return (attr
== NULL
? 0 :
23054 attr
->form
== DW_FORM_block1
23055 || attr
->form
== DW_FORM_block2
23056 || attr
->form
== DW_FORM_block4
23057 || attr
->form
== DW_FORM_block
23058 || attr
->form
== DW_FORM_exprloc
);
23061 /* Return non-zero if ATTR's value is a section offset --- classes
23062 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
23063 You may use DW_UNSND (attr) to retrieve such offsets.
23065 Section 7.5.4, "Attribute Encodings", explains that no attribute
23066 may have a value that belongs to more than one of these classes; it
23067 would be ambiguous if we did, because we use the same forms for all
23071 attr_form_is_section_offset (const struct attribute
*attr
)
23073 return (attr
->form
== DW_FORM_data4
23074 || attr
->form
== DW_FORM_data8
23075 || attr
->form
== DW_FORM_sec_offset
);
23078 /* Return non-zero if ATTR's value falls in the 'constant' class, or
23079 zero otherwise. When this function returns true, you can apply
23080 dwarf2_get_attr_constant_value to it.
23082 However, note that for some attributes you must check
23083 attr_form_is_section_offset before using this test. DW_FORM_data4
23084 and DW_FORM_data8 are members of both the constant class, and of
23085 the classes that contain offsets into other debug sections
23086 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
23087 that, if an attribute's can be either a constant or one of the
23088 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
23089 taken as section offsets, not constants.
23091 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
23092 cannot handle that. */
23095 attr_form_is_constant (const struct attribute
*attr
)
23097 switch (attr
->form
)
23099 case DW_FORM_sdata
:
23100 case DW_FORM_udata
:
23101 case DW_FORM_data1
:
23102 case DW_FORM_data2
:
23103 case DW_FORM_data4
:
23104 case DW_FORM_data8
:
23105 case DW_FORM_implicit_const
:
23113 /* DW_ADDR is always stored already as sect_offset; despite for the forms
23114 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
23117 attr_form_is_ref (const struct attribute
*attr
)
23119 switch (attr
->form
)
23121 case DW_FORM_ref_addr
:
23126 case DW_FORM_ref_udata
:
23127 case DW_FORM_GNU_ref_alt
:
23134 /* Return the .debug_loc section to use for CU.
23135 For DWO files use .debug_loc.dwo. */
23137 static struct dwarf2_section_info
*
23138 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23142 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23144 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23146 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
23147 : &dwarf2_per_objfile
->loc
);
23150 /* A helper function that fills in a dwarf2_loclist_baton. */
23153 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23154 struct dwarf2_loclist_baton
*baton
,
23155 const struct attribute
*attr
)
23157 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23159 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
23161 baton
->per_cu
= cu
->per_cu
;
23162 gdb_assert (baton
->per_cu
);
23163 /* We don't know how long the location list is, but make sure we
23164 don't run off the edge of the section. */
23165 baton
->size
= section
->size
- DW_UNSND (attr
);
23166 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23167 baton
->base_address
= cu
->base_address
;
23168 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23172 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23173 struct dwarf2_cu
*cu
, int is_block
)
23175 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23176 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23178 if (attr_form_is_section_offset (attr
)
23179 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23180 the section. If so, fall through to the complaint in the
23182 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
23184 struct dwarf2_loclist_baton
*baton
;
23186 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23188 fill_in_loclist_baton (cu
, baton
, attr
);
23190 if (cu
->base_known
== 0)
23191 complaint (&symfile_complaints
,
23192 _("Location list used without "
23193 "specifying the CU base address."));
23195 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23196 ? dwarf2_loclist_block_index
23197 : dwarf2_loclist_index
);
23198 SYMBOL_LOCATION_BATON (sym
) = baton
;
23202 struct dwarf2_locexpr_baton
*baton
;
23204 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23205 baton
->per_cu
= cu
->per_cu
;
23206 gdb_assert (baton
->per_cu
);
23208 if (attr_form_is_block (attr
))
23210 /* Note that we're just copying the block's data pointer
23211 here, not the actual data. We're still pointing into the
23212 info_buffer for SYM's objfile; right now we never release
23213 that buffer, but when we do clean up properly this may
23215 baton
->size
= DW_BLOCK (attr
)->size
;
23216 baton
->data
= DW_BLOCK (attr
)->data
;
23220 dwarf2_invalid_attrib_class_complaint ("location description",
23221 SYMBOL_NATURAL_NAME (sym
));
23225 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23226 ? dwarf2_locexpr_block_index
23227 : dwarf2_locexpr_index
);
23228 SYMBOL_LOCATION_BATON (sym
) = baton
;
23232 /* Return the OBJFILE associated with the compilation unit CU. If CU
23233 came from a separate debuginfo file, then the master objfile is
23237 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
23239 struct objfile
*objfile
= per_cu
->objfile
;
23241 /* Return the master objfile, so that we can report and look up the
23242 correct file containing this variable. */
23243 if (objfile
->separate_debug_objfile_backlink
)
23244 objfile
= objfile
->separate_debug_objfile_backlink
;
23249 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23250 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23251 CU_HEADERP first. */
23253 static const struct comp_unit_head
*
23254 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23255 struct dwarf2_per_cu_data
*per_cu
)
23257 const gdb_byte
*info_ptr
;
23260 return &per_cu
->cu
->header
;
23262 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23264 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23265 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23266 rcuh_kind::COMPILE
);
23271 /* Return the address size given in the compilation unit header for CU. */
23274 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
23276 struct comp_unit_head cu_header_local
;
23277 const struct comp_unit_head
*cu_headerp
;
23279 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23281 return cu_headerp
->addr_size
;
23284 /* Return the offset size given in the compilation unit header for CU. */
23287 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
23289 struct comp_unit_head cu_header_local
;
23290 const struct comp_unit_head
*cu_headerp
;
23292 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23294 return cu_headerp
->offset_size
;
23297 /* See its dwarf2loc.h declaration. */
23300 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
23302 struct comp_unit_head cu_header_local
;
23303 const struct comp_unit_head
*cu_headerp
;
23305 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
23307 if (cu_headerp
->version
== 2)
23308 return cu_headerp
->addr_size
;
23310 return cu_headerp
->offset_size
;
23313 /* Return the text offset of the CU. The returned offset comes from
23314 this CU's objfile. If this objfile came from a separate debuginfo
23315 file, then the offset may be different from the corresponding
23316 offset in the parent objfile. */
23319 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
23321 struct objfile
*objfile
= per_cu
->objfile
;
23323 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23326 /* Return DWARF version number of PER_CU. */
23329 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
23331 return per_cu
->dwarf_version
;
23334 /* Locate the .debug_info compilation unit from CU's objfile which contains
23335 the DIE at OFFSET. Raises an error on failure. */
23337 static struct dwarf2_per_cu_data
*
23338 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23339 unsigned int offset_in_dwz
,
23340 struct objfile
*objfile
)
23342 struct dwarf2_per_cu_data
*this_cu
;
23344 const sect_offset
*cu_off
;
23347 high
= dwarf2_per_objfile
->n_comp_units
- 1;
23350 struct dwarf2_per_cu_data
*mid_cu
;
23351 int mid
= low
+ (high
- low
) / 2;
23353 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
23354 cu_off
= &mid_cu
->sect_off
;
23355 if (mid_cu
->is_dwz
> offset_in_dwz
23356 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
23361 gdb_assert (low
== high
);
23362 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
23363 cu_off
= &this_cu
->sect_off
;
23364 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
23366 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23367 error (_("Dwarf Error: could not find partial DIE containing "
23368 "offset 0x%x [in module %s]"),
23369 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
23371 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
23373 return dwarf2_per_objfile
->all_comp_units
[low
-1];
23377 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
23378 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
23379 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23380 error (_("invalid dwarf2 offset %u"), to_underlying (sect_off
));
23381 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23386 /* Initialize dwarf2_cu CU, owned by PER_CU. */
23389 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
23391 memset (cu
, 0, sizeof (*cu
));
23393 cu
->per_cu
= per_cu
;
23394 cu
->objfile
= per_cu
->objfile
;
23395 obstack_init (&cu
->comp_unit_obstack
);
23398 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23401 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23402 enum language pretend_language
)
23404 struct attribute
*attr
;
23406 /* Set the language we're debugging. */
23407 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23409 set_cu_language (DW_UNSND (attr
), cu
);
23412 cu
->language
= pretend_language
;
23413 cu
->language_defn
= language_def (cu
->language
);
23416 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23419 /* Release one cached compilation unit, CU. We unlink it from the tree
23420 of compilation units, but we don't remove it from the read_in_chain;
23421 the caller is responsible for that.
23422 NOTE: DATA is a void * because this function is also used as a
23423 cleanup routine. */
23426 free_heap_comp_unit (void *data
)
23428 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
23430 gdb_assert (cu
->per_cu
!= NULL
);
23431 cu
->per_cu
->cu
= NULL
;
23434 obstack_free (&cu
->comp_unit_obstack
, NULL
);
23439 /* This cleanup function is passed the address of a dwarf2_cu on the stack
23440 when we're finished with it. We can't free the pointer itself, but be
23441 sure to unlink it from the cache. Also release any associated storage. */
23444 free_stack_comp_unit (void *data
)
23446 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
23448 gdb_assert (cu
->per_cu
!= NULL
);
23449 cu
->per_cu
->cu
= NULL
;
23452 obstack_free (&cu
->comp_unit_obstack
, NULL
);
23453 cu
->partial_dies
= NULL
;
23456 /* Free all cached compilation units. */
23459 free_cached_comp_units (void *data
)
23461 dwarf2_per_objfile
->free_cached_comp_units ();
23464 /* Increase the age counter on each cached compilation unit, and free
23465 any that are too old. */
23468 age_cached_comp_units (void)
23470 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23472 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
23473 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23474 while (per_cu
!= NULL
)
23476 per_cu
->cu
->last_used
++;
23477 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23478 dwarf2_mark (per_cu
->cu
);
23479 per_cu
= per_cu
->cu
->read_in_chain
;
23482 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23483 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23484 while (per_cu
!= NULL
)
23486 struct dwarf2_per_cu_data
*next_cu
;
23488 next_cu
= per_cu
->cu
->read_in_chain
;
23490 if (!per_cu
->cu
->mark
)
23492 free_heap_comp_unit (per_cu
->cu
);
23493 *last_chain
= next_cu
;
23496 last_chain
= &per_cu
->cu
->read_in_chain
;
23502 /* Remove a single compilation unit from the cache. */
23505 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23507 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23509 per_cu
= dwarf2_per_objfile
->read_in_chain
;
23510 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
23511 while (per_cu
!= NULL
)
23513 struct dwarf2_per_cu_data
*next_cu
;
23515 next_cu
= per_cu
->cu
->read_in_chain
;
23517 if (per_cu
== target_per_cu
)
23519 free_heap_comp_unit (per_cu
->cu
);
23521 *last_chain
= next_cu
;
23525 last_chain
= &per_cu
->cu
->read_in_chain
;
23531 /* Release all extra memory associated with OBJFILE. */
23534 dwarf2_free_objfile (struct objfile
*objfile
)
23537 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23538 dwarf2_objfile_data_key
);
23540 if (dwarf2_per_objfile
== NULL
)
23543 dwarf2_per_objfile
->~dwarf2_per_objfile ();
23546 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23547 We store these in a hash table separate from the DIEs, and preserve them
23548 when the DIEs are flushed out of cache.
23550 The CU "per_cu" pointer is needed because offset alone is not enough to
23551 uniquely identify the type. A file may have multiple .debug_types sections,
23552 or the type may come from a DWO file. Furthermore, while it's more logical
23553 to use per_cu->section+offset, with Fission the section with the data is in
23554 the DWO file but we don't know that section at the point we need it.
23555 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23556 because we can enter the lookup routine, get_die_type_at_offset, from
23557 outside this file, and thus won't necessarily have PER_CU->cu.
23558 Fortunately, PER_CU is stable for the life of the objfile. */
23560 struct dwarf2_per_cu_offset_and_type
23562 const struct dwarf2_per_cu_data
*per_cu
;
23563 sect_offset sect_off
;
23567 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23570 per_cu_offset_and_type_hash (const void *item
)
23572 const struct dwarf2_per_cu_offset_and_type
*ofs
23573 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23575 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23578 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23581 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23583 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23584 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23585 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23586 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23588 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23589 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23592 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23593 table if necessary. For convenience, return TYPE.
23595 The DIEs reading must have careful ordering to:
23596 * Not cause infite loops trying to read in DIEs as a prerequisite for
23597 reading current DIE.
23598 * Not trying to dereference contents of still incompletely read in types
23599 while reading in other DIEs.
23600 * Enable referencing still incompletely read in types just by a pointer to
23601 the type without accessing its fields.
23603 Therefore caller should follow these rules:
23604 * Try to fetch any prerequisite types we may need to build this DIE type
23605 before building the type and calling set_die_type.
23606 * After building type call set_die_type for current DIE as soon as
23607 possible before fetching more types to complete the current type.
23608 * Make the type as complete as possible before fetching more types. */
23610 static struct type
*
23611 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23613 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23614 struct objfile
*objfile
= cu
->objfile
;
23615 struct attribute
*attr
;
23616 struct dynamic_prop prop
;
23618 /* For Ada types, make sure that the gnat-specific data is always
23619 initialized (if not already set). There are a few types where
23620 we should not be doing so, because the type-specific area is
23621 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23622 where the type-specific area is used to store the floatformat).
23623 But this is not a problem, because the gnat-specific information
23624 is actually not needed for these types. */
23625 if (need_gnat_info (cu
)
23626 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23627 && TYPE_CODE (type
) != TYPE_CODE_FLT
23628 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23629 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23630 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23631 && !HAVE_GNAT_AUX_INFO (type
))
23632 INIT_GNAT_SPECIFIC (type
);
23634 /* Read DW_AT_allocated and set in type. */
23635 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23636 if (attr_form_is_block (attr
))
23638 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23639 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
23641 else if (attr
!= NULL
)
23643 complaint (&symfile_complaints
,
23644 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
23645 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23646 to_underlying (die
->sect_off
));
23649 /* Read DW_AT_associated and set in type. */
23650 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23651 if (attr_form_is_block (attr
))
23653 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23654 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
23656 else if (attr
!= NULL
)
23658 complaint (&symfile_complaints
,
23659 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
23660 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23661 to_underlying (die
->sect_off
));
23664 /* Read DW_AT_data_location and set in type. */
23665 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23666 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23667 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
23669 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23671 dwarf2_per_objfile
->die_type_hash
=
23672 htab_create_alloc_ex (127,
23673 per_cu_offset_and_type_hash
,
23674 per_cu_offset_and_type_eq
,
23676 &objfile
->objfile_obstack
,
23677 hashtab_obstack_allocate
,
23678 dummy_obstack_deallocate
);
23681 ofs
.per_cu
= cu
->per_cu
;
23682 ofs
.sect_off
= die
->sect_off
;
23684 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23685 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
23687 complaint (&symfile_complaints
,
23688 _("A problem internal to GDB: DIE 0x%x has type already set"),
23689 to_underlying (die
->sect_off
));
23690 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23691 struct dwarf2_per_cu_offset_and_type
);
23696 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23697 or return NULL if the die does not have a saved type. */
23699 static struct type
*
23700 get_die_type_at_offset (sect_offset sect_off
,
23701 struct dwarf2_per_cu_data
*per_cu
)
23703 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23705 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23708 ofs
.per_cu
= per_cu
;
23709 ofs
.sect_off
= sect_off
;
23710 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23711 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
23718 /* Look up the type for DIE in CU in die_type_hash,
23719 or return NULL if DIE does not have a saved type. */
23721 static struct type
*
23722 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23724 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23727 /* Add a dependence relationship from CU to REF_PER_CU. */
23730 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23731 struct dwarf2_per_cu_data
*ref_per_cu
)
23735 if (cu
->dependencies
== NULL
)
23737 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23738 NULL
, &cu
->comp_unit_obstack
,
23739 hashtab_obstack_allocate
,
23740 dummy_obstack_deallocate
);
23742 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23744 *slot
= ref_per_cu
;
23747 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23748 Set the mark field in every compilation unit in the
23749 cache that we must keep because we are keeping CU. */
23752 dwarf2_mark_helper (void **slot
, void *data
)
23754 struct dwarf2_per_cu_data
*per_cu
;
23756 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23758 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23759 reading of the chain. As such dependencies remain valid it is not much
23760 useful to track and undo them during QUIT cleanups. */
23761 if (per_cu
->cu
== NULL
)
23764 if (per_cu
->cu
->mark
)
23766 per_cu
->cu
->mark
= 1;
23768 if (per_cu
->cu
->dependencies
!= NULL
)
23769 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23774 /* Set the mark field in CU and in every other compilation unit in the
23775 cache that we must keep because we are keeping CU. */
23778 dwarf2_mark (struct dwarf2_cu
*cu
)
23783 if (cu
->dependencies
!= NULL
)
23784 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23788 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23792 per_cu
->cu
->mark
= 0;
23793 per_cu
= per_cu
->cu
->read_in_chain
;
23797 /* Trivial hash function for partial_die_info: the hash value of a DIE
23798 is its offset in .debug_info for this objfile. */
23801 partial_die_hash (const void *item
)
23803 const struct partial_die_info
*part_die
23804 = (const struct partial_die_info
*) item
;
23806 return to_underlying (part_die
->sect_off
);
23809 /* Trivial comparison function for partial_die_info structures: two DIEs
23810 are equal if they have the same offset. */
23813 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23815 const struct partial_die_info
*part_die_lhs
23816 = (const struct partial_die_info
*) item_lhs
;
23817 const struct partial_die_info
*part_die_rhs
23818 = (const struct partial_die_info
*) item_rhs
;
23820 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23823 static struct cmd_list_element
*set_dwarf_cmdlist
;
23824 static struct cmd_list_element
*show_dwarf_cmdlist
;
23827 set_dwarf_cmd (const char *args
, int from_tty
)
23829 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
23834 show_dwarf_cmd (const char *args
, int from_tty
)
23836 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
23839 /* Free data associated with OBJFILE, if necessary. */
23842 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
23844 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
23847 /* Make sure we don't accidentally use dwarf2_per_objfile while
23849 dwarf2_per_objfile
= NULL
;
23851 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
23852 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
23854 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
23855 VEC_free (dwarf2_per_cu_ptr
,
23856 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
23857 xfree (data
->all_type_units
);
23859 VEC_free (dwarf2_section_info_def
, data
->types
);
23861 if (data
->dwo_files
)
23862 free_dwo_files (data
->dwo_files
, objfile
);
23863 if (data
->dwp_file
)
23864 gdb_bfd_unref (data
->dwp_file
->dbfd
);
23866 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
23867 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
23869 if (data
->index_table
!= NULL
)
23870 data
->index_table
->~mapped_index ();
23874 /* The "save gdb-index" command. */
23876 /* In-memory buffer to prepare data to be written later to a file. */
23880 /* Copy DATA to the end of the buffer. */
23881 template<typename T
>
23882 void append_data (const T
&data
)
23884 std::copy (reinterpret_cast<const gdb_byte
*> (&data
),
23885 reinterpret_cast<const gdb_byte
*> (&data
+ 1),
23886 grow (sizeof (data
)));
23889 /* Copy CSTR (a zero-terminated string) to the end of buffer. The
23890 terminating zero is appended too. */
23891 void append_cstr0 (const char *cstr
)
23893 const size_t size
= strlen (cstr
) + 1;
23894 std::copy (cstr
, cstr
+ size
, grow (size
));
23897 /* Accept a host-format integer in VAL and append it to the buffer
23898 as a target-format integer which is LEN bytes long. */
23899 void append_uint (size_t len
, bfd_endian byte_order
, ULONGEST val
)
23901 ::store_unsigned_integer (grow (len
), len
, byte_order
, val
);
23904 /* Return the size of the buffer. */
23905 size_t size () const
23907 return m_vec
.size ();
23910 /* Write the buffer to FILE. */
23911 void file_write (FILE *file
) const
23913 if (::fwrite (m_vec
.data (), 1, m_vec
.size (), file
) != m_vec
.size ())
23914 error (_("couldn't write data to file"));
23918 /* Grow SIZE bytes at the end of the buffer. Returns a pointer to
23919 the start of the new block. */
23920 gdb_byte
*grow (size_t size
)
23922 m_vec
.resize (m_vec
.size () + size
);
23923 return &*m_vec
.end () - size
;
23926 gdb::byte_vector m_vec
;
23929 /* An entry in the symbol table. */
23930 struct symtab_index_entry
23932 /* The name of the symbol. */
23934 /* The offset of the name in the constant pool. */
23935 offset_type index_offset
;
23936 /* A sorted vector of the indices of all the CUs that hold an object
23938 std::vector
<offset_type
> cu_indices
;
23941 /* The symbol table. This is a power-of-2-sized hash table. */
23942 struct mapped_symtab
23946 data
.resize (1024);
23949 offset_type n_elements
= 0;
23950 std::vector
<symtab_index_entry
> data
;
23953 /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to
23956 Function is used only during write_hash_table so no index format backward
23957 compatibility is needed. */
23959 static symtab_index_entry
&
23960 find_slot (struct mapped_symtab
*symtab
, const char *name
)
23962 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
23964 index
= hash
& (symtab
->data
.size () - 1);
23965 step
= ((hash
* 17) & (symtab
->data
.size () - 1)) | 1;
23969 if (symtab
->data
[index
].name
== NULL
23970 || strcmp (name
, symtab
->data
[index
].name
) == 0)
23971 return symtab
->data
[index
];
23972 index
= (index
+ step
) & (symtab
->data
.size () - 1);
23976 /* Expand SYMTAB's hash table. */
23979 hash_expand (struct mapped_symtab
*symtab
)
23981 auto old_entries
= std::move (symtab
->data
);
23983 symtab
->data
.clear ();
23984 symtab
->data
.resize (old_entries
.size () * 2);
23986 for (auto &it
: old_entries
)
23987 if (it
.name
!= NULL
)
23989 auto &ref
= find_slot (symtab
, it
.name
);
23990 ref
= std::move (it
);
23994 /* Add an entry to SYMTAB. NAME is the name of the symbol.
23995 CU_INDEX is the index of the CU in which the symbol appears.
23996 IS_STATIC is one if the symbol is static, otherwise zero (global). */
23999 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
24000 int is_static
, gdb_index_symbol_kind kind
,
24001 offset_type cu_index
)
24003 offset_type cu_index_and_attrs
;
24005 ++symtab
->n_elements
;
24006 if (4 * symtab
->n_elements
/ 3 >= symtab
->data
.size ())
24007 hash_expand (symtab
);
24009 symtab_index_entry
&slot
= find_slot (symtab
, name
);
24010 if (slot
.name
== NULL
)
24013 /* index_offset is set later. */
24016 cu_index_and_attrs
= 0;
24017 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
24018 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
24019 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
24021 /* We don't want to record an index value twice as we want to avoid the
24023 We process all global symbols and then all static symbols
24024 (which would allow us to avoid the duplication by only having to check
24025 the last entry pushed), but a symbol could have multiple kinds in one CU.
24026 To keep things simple we don't worry about the duplication here and
24027 sort and uniqufy the list after we've processed all symbols. */
24028 slot
.cu_indices
.push_back (cu_index_and_attrs
);
24031 /* Sort and remove duplicates of all symbols' cu_indices lists. */
24034 uniquify_cu_indices (struct mapped_symtab
*symtab
)
24036 for (auto &entry
: symtab
->data
)
24038 if (entry
.name
!= NULL
&& !entry
.cu_indices
.empty ())
24040 auto &cu_indices
= entry
.cu_indices
;
24041 std::sort (cu_indices
.begin (), cu_indices
.end ());
24042 auto from
= std::unique (cu_indices
.begin (), cu_indices
.end ());
24043 cu_indices
.erase (from
, cu_indices
.end ());
24048 /* A form of 'const char *' suitable for container keys. Only the
24049 pointer is stored. The strings themselves are compared, not the
24054 c_str_view (const char *cstr
)
24058 bool operator== (const c_str_view
&other
) const
24060 return strcmp (m_cstr
, other
.m_cstr
) == 0;
24064 friend class c_str_view_hasher
;
24065 const char *const m_cstr
;
24068 /* A std::unordered_map::hasher for c_str_view that uses the right
24069 hash function for strings in a mapped index. */
24070 class c_str_view_hasher
24073 size_t operator () (const c_str_view
&x
) const
24075 return mapped_index_string_hash (INT_MAX
, x
.m_cstr
);
24079 /* A std::unordered_map::hasher for std::vector<>. */
24080 template<typename T
>
24081 class vector_hasher
24084 size_t operator () (const std::vector
<T
> &key
) const
24086 return iterative_hash (key
.data (),
24087 sizeof (key
.front ()) * key
.size (), 0);
24091 /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with
24092 constant pool entries going into the data buffer CPOOL. */
24095 write_hash_table (mapped_symtab
*symtab
, data_buf
&output
, data_buf
&cpool
)
24098 /* Elements are sorted vectors of the indices of all the CUs that
24099 hold an object of this name. */
24100 std::unordered_map
<std::vector
<offset_type
>, offset_type
,
24101 vector_hasher
<offset_type
>>
24104 /* We add all the index vectors to the constant pool first, to
24105 ensure alignment is ok. */
24106 for (symtab_index_entry
&entry
: symtab
->data
)
24108 if (entry
.name
== NULL
)
24110 gdb_assert (entry
.index_offset
== 0);
24112 /* Finding before inserting is faster than always trying to
24113 insert, because inserting always allocates a node, does the
24114 lookup, and then destroys the new node if another node
24115 already had the same key. C++17 try_emplace will avoid
24118 = symbol_hash_table
.find (entry
.cu_indices
);
24119 if (found
!= symbol_hash_table
.end ())
24121 entry
.index_offset
= found
->second
;
24125 symbol_hash_table
.emplace (entry
.cu_indices
, cpool
.size ());
24126 entry
.index_offset
= cpool
.size ();
24127 cpool
.append_data (MAYBE_SWAP (entry
.cu_indices
.size ()));
24128 for (const auto index
: entry
.cu_indices
)
24129 cpool
.append_data (MAYBE_SWAP (index
));
24133 /* Now write out the hash table. */
24134 std::unordered_map
<c_str_view
, offset_type
, c_str_view_hasher
> str_table
;
24135 for (const auto &entry
: symtab
->data
)
24137 offset_type str_off
, vec_off
;
24139 if (entry
.name
!= NULL
)
24141 const auto insertpair
= str_table
.emplace (entry
.name
, cpool
.size ());
24142 if (insertpair
.second
)
24143 cpool
.append_cstr0 (entry
.name
);
24144 str_off
= insertpair
.first
->second
;
24145 vec_off
= entry
.index_offset
;
24149 /* While 0 is a valid constant pool index, it is not valid
24150 to have 0 for both offsets. */
24155 output
.append_data (MAYBE_SWAP (str_off
));
24156 output
.append_data (MAYBE_SWAP (vec_off
));
24160 typedef std::unordered_map
<partial_symtab
*, unsigned int> psym_index_map
;
24162 /* Helper struct for building the address table. */
24163 struct addrmap_index_data
24165 addrmap_index_data (data_buf
&addr_vec_
, psym_index_map
&cu_index_htab_
)
24166 : addr_vec (addr_vec_
), cu_index_htab (cu_index_htab_
)
24169 struct objfile
*objfile
;
24170 data_buf
&addr_vec
;
24171 psym_index_map
&cu_index_htab
;
24173 /* Non-zero if the previous_* fields are valid.
24174 We can't write an entry until we see the next entry (since it is only then
24175 that we know the end of the entry). */
24176 int previous_valid
;
24177 /* Index of the CU in the table of all CUs in the index file. */
24178 unsigned int previous_cu_index
;
24179 /* Start address of the CU. */
24180 CORE_ADDR previous_cu_start
;
24183 /* Write an address entry to ADDR_VEC. */
24186 add_address_entry (struct objfile
*objfile
, data_buf
&addr_vec
,
24187 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
24189 CORE_ADDR baseaddr
;
24191 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24193 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
24194 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
24195 addr_vec
.append_data (MAYBE_SWAP (cu_index
));
24198 /* Worker function for traversing an addrmap to build the address table. */
24201 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
24203 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
24204 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
24206 if (data
->previous_valid
)
24207 add_address_entry (data
->objfile
, data
->addr_vec
,
24208 data
->previous_cu_start
, start_addr
,
24209 data
->previous_cu_index
);
24211 data
->previous_cu_start
= start_addr
;
24214 const auto it
= data
->cu_index_htab
.find (pst
);
24215 gdb_assert (it
!= data
->cu_index_htab
.cend ());
24216 data
->previous_cu_index
= it
->second
;
24217 data
->previous_valid
= 1;
24220 data
->previous_valid
= 0;
24225 /* Write OBJFILE's address map to ADDR_VEC.
24226 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
24227 in the index file. */
24230 write_address_map (struct objfile
*objfile
, data_buf
&addr_vec
,
24231 psym_index_map
&cu_index_htab
)
24233 struct addrmap_index_data
addrmap_index_data (addr_vec
, cu_index_htab
);
24235 /* When writing the address table, we have to cope with the fact that
24236 the addrmap iterator only provides the start of a region; we have to
24237 wait until the next invocation to get the start of the next region. */
24239 addrmap_index_data
.objfile
= objfile
;
24240 addrmap_index_data
.previous_valid
= 0;
24242 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
24243 &addrmap_index_data
);
24245 /* It's highly unlikely the last entry (end address = 0xff...ff)
24246 is valid, but we should still handle it.
24247 The end address is recorded as the start of the next region, but that
24248 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
24250 if (addrmap_index_data
.previous_valid
)
24251 add_address_entry (objfile
, addr_vec
,
24252 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
24253 addrmap_index_data
.previous_cu_index
);
24256 /* Return the symbol kind of PSYM. */
24258 static gdb_index_symbol_kind
24259 symbol_kind (struct partial_symbol
*psym
)
24261 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
24262 enum address_class aclass
= PSYMBOL_CLASS (psym
);
24270 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
24272 return GDB_INDEX_SYMBOL_KIND_TYPE
;
24274 case LOC_CONST_BYTES
:
24275 case LOC_OPTIMIZED_OUT
:
24277 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
24279 /* Note: It's currently impossible to recognize psyms as enum values
24280 short of reading the type info. For now punt. */
24281 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
24283 /* There are other LOC_FOO values that one might want to classify
24284 as variables, but dwarf2read.c doesn't currently use them. */
24285 return GDB_INDEX_SYMBOL_KIND_OTHER
;
24287 case STRUCT_DOMAIN
:
24288 return GDB_INDEX_SYMBOL_KIND_TYPE
;
24290 return GDB_INDEX_SYMBOL_KIND_OTHER
;
24294 /* Add a list of partial symbols to SYMTAB. */
24297 write_psymbols (struct mapped_symtab
*symtab
,
24298 std::unordered_set
<partial_symbol
*> &psyms_seen
,
24299 struct partial_symbol
**psymp
,
24301 offset_type cu_index
,
24304 for (; count
-- > 0; ++psymp
)
24306 struct partial_symbol
*psym
= *psymp
;
24308 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
24309 error (_("Ada is not currently supported by the index"));
24311 /* Only add a given psymbol once. */
24312 if (psyms_seen
.insert (psym
).second
)
24314 gdb_index_symbol_kind kind
= symbol_kind (psym
);
24316 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
24317 is_static
, kind
, cu_index
);
24322 /* A helper struct used when iterating over debug_types. */
24323 struct signatured_type_index_data
24325 signatured_type_index_data (data_buf
&types_list_
,
24326 std::unordered_set
<partial_symbol
*> &psyms_seen_
)
24327 : types_list (types_list_
), psyms_seen (psyms_seen_
)
24330 struct objfile
*objfile
;
24331 struct mapped_symtab
*symtab
;
24332 data_buf
&types_list
;
24333 std::unordered_set
<partial_symbol
*> &psyms_seen
;
24337 /* A helper function that writes a single signatured_type to an
24341 write_one_signatured_type (void **slot
, void *d
)
24343 struct signatured_type_index_data
*info
24344 = (struct signatured_type_index_data
*) d
;
24345 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
24346 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
24348 write_psymbols (info
->symtab
,
24350 &info
->objfile
->global_psymbols
[psymtab
->globals_offset
],
24351 psymtab
->n_global_syms
, info
->cu_index
,
24353 write_psymbols (info
->symtab
,
24355 &info
->objfile
->static_psymbols
[psymtab
->statics_offset
],
24356 psymtab
->n_static_syms
, info
->cu_index
,
24359 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24360 to_underlying (entry
->per_cu
.sect_off
));
24361 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24362 to_underlying (entry
->type_offset_in_tu
));
24363 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
, entry
->signature
);
24370 /* Recurse into all "included" dependencies and count their symbols as
24371 if they appeared in this psymtab. */
24374 recursively_count_psymbols (struct partial_symtab
*psymtab
,
24375 size_t &psyms_seen
)
24377 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
24378 if (psymtab
->dependencies
[i
]->user
!= NULL
)
24379 recursively_count_psymbols (psymtab
->dependencies
[i
],
24382 psyms_seen
+= psymtab
->n_global_syms
;
24383 psyms_seen
+= psymtab
->n_static_syms
;
24386 /* Recurse into all "included" dependencies and write their symbols as
24387 if they appeared in this psymtab. */
24390 recursively_write_psymbols (struct objfile
*objfile
,
24391 struct partial_symtab
*psymtab
,
24392 struct mapped_symtab
*symtab
,
24393 std::unordered_set
<partial_symbol
*> &psyms_seen
,
24394 offset_type cu_index
)
24398 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
24399 if (psymtab
->dependencies
[i
]->user
!= NULL
)
24400 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
24401 symtab
, psyms_seen
, cu_index
);
24403 write_psymbols (symtab
,
24405 &objfile
->global_psymbols
[psymtab
->globals_offset
],
24406 psymtab
->n_global_syms
, cu_index
,
24408 write_psymbols (symtab
,
24410 &objfile
->static_psymbols
[psymtab
->statics_offset
],
24411 psymtab
->n_static_syms
, cu_index
,
24415 /* Create an index file for OBJFILE in the directory DIR. */
24418 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
24420 if (dwarf2_per_objfile
->using_index
)
24421 error (_("Cannot use an index to create the index"));
24423 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
24424 error (_("Cannot make an index when the file has multiple .debug_types sections"));
24426 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
24430 if (stat (objfile_name (objfile
), &st
) < 0)
24431 perror_with_name (objfile_name (objfile
));
24433 std::string
filename (std::string (dir
) + SLASH_STRING
24434 + lbasename (objfile_name (objfile
)) + INDEX_SUFFIX
);
24436 FILE *out_file
= gdb_fopen_cloexec (filename
.c_str (), "wb").release ();
24438 error (_("Can't open `%s' for writing"), filename
.c_str ());
24440 /* Order matters here; we want FILE to be closed before FILENAME is
24441 unlinked, because on MS-Windows one cannot delete a file that is
24442 still open. (Don't call anything here that might throw until
24443 file_closer is created.) */
24444 gdb::unlinker
unlink_file (filename
.c_str ());
24445 gdb_file_up
close_out_file (out_file
);
24447 mapped_symtab symtab
;
24450 /* While we're scanning CU's create a table that maps a psymtab pointer
24451 (which is what addrmap records) to its index (which is what is recorded
24452 in the index file). This will later be needed to write the address
24454 psym_index_map cu_index_htab
;
24455 cu_index_htab
.reserve (dwarf2_per_objfile
->n_comp_units
);
24457 /* The CU list is already sorted, so we don't need to do additional
24458 work here. Also, the debug_types entries do not appear in
24459 all_comp_units, but only in their own hash table. */
24461 /* The psyms_seen set is potentially going to be largish (~40k
24462 elements when indexing a -g3 build of GDB itself). Estimate the
24463 number of elements in order to avoid too many rehashes, which
24464 require rebuilding buckets and thus many trips to
24466 size_t psyms_count
= 0;
24467 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
24469 struct dwarf2_per_cu_data
*per_cu
24470 = dwarf2_per_objfile
->all_comp_units
[i
];
24471 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
24473 if (psymtab
!= NULL
&& psymtab
->user
== NULL
)
24474 recursively_count_psymbols (psymtab
, psyms_count
);
24476 /* Generating an index for gdb itself shows a ratio of
24477 TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */
24478 std::unordered_set
<partial_symbol
*> psyms_seen (psyms_count
/ 4);
24479 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
24481 struct dwarf2_per_cu_data
*per_cu
24482 = dwarf2_per_objfile
->all_comp_units
[i
];
24483 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
24485 /* CU of a shared file from 'dwz -m' may be unused by this main file.
24486 It may be referenced from a local scope but in such case it does not
24487 need to be present in .gdb_index. */
24488 if (psymtab
== NULL
)
24491 if (psymtab
->user
== NULL
)
24492 recursively_write_psymbols (objfile
, psymtab
, &symtab
,
24495 const auto insertpair
= cu_index_htab
.emplace (psymtab
, i
);
24496 gdb_assert (insertpair
.second
);
24498 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
24499 to_underlying (per_cu
->sect_off
));
24500 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
24503 /* Dump the address map. */
24505 write_address_map (objfile
, addr_vec
, cu_index_htab
);
24507 /* Write out the .debug_type entries, if any. */
24508 data_buf types_cu_list
;
24509 if (dwarf2_per_objfile
->signatured_types
)
24511 signatured_type_index_data
sig_data (types_cu_list
,
24514 sig_data
.objfile
= objfile
;
24515 sig_data
.symtab
= &symtab
;
24516 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
24517 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
24518 write_one_signatured_type
, &sig_data
);
24521 /* Now that we've processed all symbols we can shrink their cu_indices
24523 uniquify_cu_indices (&symtab
);
24525 data_buf symtab_vec
, constant_pool
;
24526 write_hash_table (&symtab
, symtab_vec
, constant_pool
);
24529 const offset_type size_of_contents
= 6 * sizeof (offset_type
);
24530 offset_type total_len
= size_of_contents
;
24532 /* The version number. */
24533 contents
.append_data (MAYBE_SWAP (8));
24535 /* The offset of the CU list from the start of the file. */
24536 contents
.append_data (MAYBE_SWAP (total_len
));
24537 total_len
+= cu_list
.size ();
24539 /* The offset of the types CU list from the start of the file. */
24540 contents
.append_data (MAYBE_SWAP (total_len
));
24541 total_len
+= types_cu_list
.size ();
24543 /* The offset of the address table from the start of the file. */
24544 contents
.append_data (MAYBE_SWAP (total_len
));
24545 total_len
+= addr_vec
.size ();
24547 /* The offset of the symbol table from the start of the file. */
24548 contents
.append_data (MAYBE_SWAP (total_len
));
24549 total_len
+= symtab_vec
.size ();
24551 /* The offset of the constant pool from the start of the file. */
24552 contents
.append_data (MAYBE_SWAP (total_len
));
24553 total_len
+= constant_pool
.size ();
24555 gdb_assert (contents
.size () == size_of_contents
);
24557 contents
.file_write (out_file
);
24558 cu_list
.file_write (out_file
);
24559 types_cu_list
.file_write (out_file
);
24560 addr_vec
.file_write (out_file
);
24561 symtab_vec
.file_write (out_file
);
24562 constant_pool
.file_write (out_file
);
24564 /* We want to keep the file. */
24565 unlink_file
.keep ();
24568 /* Implementation of the `save gdb-index' command.
24570 Note that the file format used by this command is documented in the
24571 GDB manual. Any changes here must be documented there. */
24574 save_gdb_index_command (const char *arg
, int from_tty
)
24576 struct objfile
*objfile
;
24579 error (_("usage: save gdb-index DIRECTORY"));
24581 ALL_OBJFILES (objfile
)
24585 /* If the objfile does not correspond to an actual file, skip it. */
24586 if (stat (objfile_name (objfile
), &st
) < 0)
24590 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
24591 dwarf2_objfile_data_key
);
24592 if (dwarf2_per_objfile
)
24597 write_psymtabs_to_index (objfile
, arg
);
24599 CATCH (except
, RETURN_MASK_ERROR
)
24601 exception_fprintf (gdb_stderr
, except
,
24602 _("Error while writing index for `%s': "),
24603 objfile_name (objfile
));
24612 int dwarf_always_disassemble
;
24615 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
24616 struct cmd_list_element
*c
, const char *value
)
24618 fprintf_filtered (file
,
24619 _("Whether to always disassemble "
24620 "DWARF expressions is %s.\n"),
24625 show_check_physname (struct ui_file
*file
, int from_tty
,
24626 struct cmd_list_element
*c
, const char *value
)
24628 fprintf_filtered (file
,
24629 _("Whether to check \"physname\" is %s.\n"),
24634 _initialize_dwarf2_read (void)
24636 struct cmd_list_element
*c
;
24638 dwarf2_objfile_data_key
24639 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
24641 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
24642 Set DWARF specific variables.\n\
24643 Configure DWARF variables such as the cache size"),
24644 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24645 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24647 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
24648 Show DWARF specific variables\n\
24649 Show DWARF variables such as the cache size"),
24650 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24651 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24653 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24654 &dwarf_max_cache_age
, _("\
24655 Set the upper bound on the age of cached DWARF compilation units."), _("\
24656 Show the upper bound on the age of cached DWARF compilation units."), _("\
24657 A higher limit means that cached compilation units will be stored\n\
24658 in memory longer, and more total memory will be used. Zero disables\n\
24659 caching, which can slow down startup."),
24661 show_dwarf_max_cache_age
,
24662 &set_dwarf_cmdlist
,
24663 &show_dwarf_cmdlist
);
24665 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
24666 &dwarf_always_disassemble
, _("\
24667 Set whether `info address' always disassembles DWARF expressions."), _("\
24668 Show whether `info address' always disassembles DWARF expressions."), _("\
24669 When enabled, DWARF expressions are always printed in an assembly-like\n\
24670 syntax. When disabled, expressions will be printed in a more\n\
24671 conversational style, when possible."),
24673 show_dwarf_always_disassemble
,
24674 &set_dwarf_cmdlist
,
24675 &show_dwarf_cmdlist
);
24677 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24678 Set debugging of the DWARF reader."), _("\
24679 Show debugging of the DWARF reader."), _("\
24680 When enabled (non-zero), debugging messages are printed during DWARF\n\
24681 reading and symtab expansion. A value of 1 (one) provides basic\n\
24682 information. A value greater than 1 provides more verbose information."),
24685 &setdebuglist
, &showdebuglist
);
24687 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24688 Set debugging of the DWARF DIE reader."), _("\
24689 Show debugging of the DWARF DIE reader."), _("\
24690 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24691 The value is the maximum depth to print."),
24694 &setdebuglist
, &showdebuglist
);
24696 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24697 Set debugging of the dwarf line reader."), _("\
24698 Show debugging of the dwarf line reader."), _("\
24699 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24700 A value of 1 (one) provides basic information.\n\
24701 A value greater than 1 provides more verbose information."),
24704 &setdebuglist
, &showdebuglist
);
24706 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24707 Set cross-checking of \"physname\" code against demangler."), _("\
24708 Show cross-checking of \"physname\" code against demangler."), _("\
24709 When enabled, GDB's internal \"physname\" code is checked against\n\
24711 NULL
, show_check_physname
,
24712 &setdebuglist
, &showdebuglist
);
24714 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24715 no_class
, &use_deprecated_index_sections
, _("\
24716 Set whether to use deprecated gdb_index sections."), _("\
24717 Show whether to use deprecated gdb_index sections."), _("\
24718 When enabled, deprecated .gdb_index sections are used anyway.\n\
24719 Normally they are ignored either because of a missing feature or\n\
24720 performance issue.\n\
24721 Warning: This option must be enabled before gdb reads the file."),
24724 &setlist
, &showlist
);
24726 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
24728 Save a gdb-index file.\n\
24729 Usage: save gdb-index DIRECTORY"),
24731 set_cmd_completer (c
, filename_completer
);
24733 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24734 &dwarf2_locexpr_funcs
);
24735 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24736 &dwarf2_loclist_funcs
);
24738 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24739 &dwarf2_block_frame_base_locexpr_funcs
);
24740 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24741 &dwarf2_block_frame_base_loclist_funcs
);
24744 selftests::register_test ("dw2_expand_symtabs_matching",
24745 selftests::dw2_expand_symtabs_matching::run_test
);