1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2012 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. */
39 #include "gdb-demangle.h"
40 #include "expression.h"
41 #include "filenames.h" /* for DOSish file names */
44 #include "complaints.h"
46 #include "dwarf2expr.h"
47 #include "dwarf2loc.h"
48 #include "cp-support.h"
54 #include "typeprint.h"
57 #include "exceptions.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
68 #include "gdb_string.h"
69 #include "gdb_assert.h"
70 #include <sys/types.h>
77 #define MAP_FAILED ((void *) -1)
81 typedef struct symbol
*symbolp
;
84 /* When non-zero, dump DIEs after they are read in. */
85 static int dwarf2_die_debug
= 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname
= 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 int use_deprecated_index_sections
= 0;
95 /* When set, the file that we're processing is known to have debugging
96 info for C++ namespaces. GCC 3.3.x did not produce this information,
97 but later versions do. */
99 static int processing_has_namespace_info
;
101 static const struct objfile_data
*dwarf2_objfile_data_key
;
103 struct dwarf2_section_info
108 /* Not NULL if the section was actually mmapped. */
110 /* Page aligned size of mmapped area. */
111 bfd_size_type map_len
;
112 /* True if we have tried to read this section. */
116 typedef struct dwarf2_section_info dwarf2_section_info_def
;
117 DEF_VEC_O (dwarf2_section_info_def
);
119 /* All offsets in the index are of this type. It must be
120 architecture-independent. */
121 typedef uint32_t offset_type
;
123 DEF_VEC_I (offset_type
);
125 /* A description of the mapped index. The file format is described in
126 a comment by the code that writes the index. */
129 /* Index data format version. */
132 /* The total length of the buffer. */
135 /* A pointer to the address table data. */
136 const gdb_byte
*address_table
;
138 /* Size of the address table data in bytes. */
139 offset_type address_table_size
;
141 /* The symbol table, implemented as a hash table. */
142 const offset_type
*symbol_table
;
144 /* Size in slots, each slot is 2 offset_types. */
145 offset_type symbol_table_slots
;
147 /* A pointer to the constant pool. */
148 const char *constant_pool
;
151 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
152 DEF_VEC_P (dwarf2_per_cu_ptr
);
154 /* Collection of data recorded per objfile.
155 This hangs off of dwarf2_objfile_data_key. */
157 struct dwarf2_per_objfile
159 struct dwarf2_section_info info
;
160 struct dwarf2_section_info abbrev
;
161 struct dwarf2_section_info line
;
162 struct dwarf2_section_info loc
;
163 struct dwarf2_section_info macinfo
;
164 struct dwarf2_section_info macro
;
165 struct dwarf2_section_info str
;
166 struct dwarf2_section_info ranges
;
167 struct dwarf2_section_info addr
;
168 struct dwarf2_section_info frame
;
169 struct dwarf2_section_info eh_frame
;
170 struct dwarf2_section_info gdb_index
;
172 VEC (dwarf2_section_info_def
) *types
;
175 struct objfile
*objfile
;
177 /* Table of all the compilation units. This is used to locate
178 the target compilation unit of a particular reference. */
179 struct dwarf2_per_cu_data
**all_comp_units
;
181 /* The number of compilation units in ALL_COMP_UNITS. */
184 /* The number of .debug_types-related CUs. */
187 /* The .debug_types-related CUs (TUs). */
188 struct dwarf2_per_cu_data
**all_type_units
;
190 /* A chain of compilation units that are currently read in, so that
191 they can be freed later. */
192 struct dwarf2_per_cu_data
*read_in_chain
;
194 /* A table mapping .debug_types signatures to its signatured_type entry.
195 This is NULL if the .debug_types section hasn't been read in yet. */
196 htab_t signatured_types
;
198 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
199 This is NULL if the table hasn't been allocated yet. */
202 /* A flag indicating wether this objfile has a section loaded at a
204 int has_section_at_zero
;
206 /* True if we are using the mapped index,
207 or we are faking it for OBJF_READNOW's sake. */
208 unsigned char using_index
;
210 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
211 struct mapped_index
*index_table
;
213 /* When using index_table, this keeps track of all quick_file_names entries.
214 TUs can share line table entries with CUs or other TUs, and there can be
215 a lot more TUs than unique line tables, so we maintain a separate table
216 of all line table entries to support the sharing. */
217 htab_t quick_file_names_table
;
219 /* Set during partial symbol reading, to prevent queueing of full
221 int reading_partial_symbols
;
223 /* Table mapping type DIEs to their struct type *.
224 This is NULL if not allocated yet.
225 The mapping is done via (CU/TU signature + DIE offset) -> type. */
226 htab_t die_type_hash
;
228 /* The CUs we recently read. */
229 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
232 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
234 /* Default names of the debugging sections. */
236 /* Note that if the debugging section has been compressed, it might
237 have a name like .zdebug_info. */
239 static const struct dwarf2_debug_sections dwarf2_elf_names
=
241 { ".debug_info", ".zdebug_info" },
242 { ".debug_abbrev", ".zdebug_abbrev" },
243 { ".debug_line", ".zdebug_line" },
244 { ".debug_loc", ".zdebug_loc" },
245 { ".debug_macinfo", ".zdebug_macinfo" },
246 { ".debug_macro", ".zdebug_macro" },
247 { ".debug_str", ".zdebug_str" },
248 { ".debug_ranges", ".zdebug_ranges" },
249 { ".debug_types", ".zdebug_types" },
250 { ".debug_addr", ".zdebug_addr" },
251 { ".debug_frame", ".zdebug_frame" },
252 { ".eh_frame", NULL
},
253 { ".gdb_index", ".zgdb_index" },
257 /* List of DWO sections. */
259 static const struct dwo_section_names
261 struct dwarf2_section_names abbrev_dwo
;
262 struct dwarf2_section_names info_dwo
;
263 struct dwarf2_section_names line_dwo
;
264 struct dwarf2_section_names loc_dwo
;
265 struct dwarf2_section_names str_dwo
;
266 struct dwarf2_section_names str_offsets_dwo
;
267 struct dwarf2_section_names types_dwo
;
271 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
272 { ".debug_info.dwo", ".zdebug_info.dwo" },
273 { ".debug_line.dwo", ".zdebug_line.dwo" },
274 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
275 { ".debug_str.dwo", ".zdebug_str.dwo" },
276 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
277 { ".debug_types.dwo", ".zdebug_types.dwo" },
280 /* local data types */
282 /* We hold several abbreviation tables in memory at the same time. */
283 #ifndef ABBREV_HASH_SIZE
284 #define ABBREV_HASH_SIZE 121
287 /* The data in a compilation unit header, after target2host
288 translation, looks like this. */
289 struct comp_unit_head
293 unsigned char addr_size
;
294 unsigned char signed_addr_p
;
295 sect_offset abbrev_offset
;
297 /* Size of file offsets; either 4 or 8. */
298 unsigned int offset_size
;
300 /* Size of the length field; either 4 or 12. */
301 unsigned int initial_length_size
;
303 /* Offset to the first byte of this compilation unit header in the
304 .debug_info section, for resolving relative reference dies. */
307 /* Offset to first die in this cu from the start of the cu.
308 This will be the first byte following the compilation unit header. */
309 cu_offset first_die_offset
;
312 /* Type used for delaying computation of method physnames.
313 See comments for compute_delayed_physnames. */
314 struct delayed_method_info
316 /* The type to which the method is attached, i.e., its parent class. */
319 /* The index of the method in the type's function fieldlists. */
322 /* The index of the method in the fieldlist. */
325 /* The name of the DIE. */
328 /* The DIE associated with this method. */
329 struct die_info
*die
;
332 typedef struct delayed_method_info delayed_method_info
;
333 DEF_VEC_O (delayed_method_info
);
335 /* Internal state when decoding a particular compilation unit. */
338 /* The objfile containing this compilation unit. */
339 struct objfile
*objfile
;
341 /* The header of the compilation unit. */
342 struct comp_unit_head header
;
344 /* Base address of this compilation unit. */
345 CORE_ADDR base_address
;
347 /* Non-zero if base_address has been set. */
350 /* The language we are debugging. */
351 enum language language
;
352 const struct language_defn
*language_defn
;
354 const char *producer
;
356 /* The generic symbol table building routines have separate lists for
357 file scope symbols and all all other scopes (local scopes). So
358 we need to select the right one to pass to add_symbol_to_list().
359 We do it by keeping a pointer to the correct list in list_in_scope.
361 FIXME: The original dwarf code just treated the file scope as the
362 first local scope, and all other local scopes as nested local
363 scopes, and worked fine. Check to see if we really need to
364 distinguish these in buildsym.c. */
365 struct pending
**list_in_scope
;
367 /* DWARF abbreviation table associated with this compilation unit. */
368 struct abbrev_info
**dwarf2_abbrevs
;
370 /* Storage for the abbrev table. */
371 struct obstack abbrev_obstack
;
373 /* Hash table holding all the loaded partial DIEs
374 with partial_die->offset.SECT_OFF as hash. */
377 /* Storage for things with the same lifetime as this read-in compilation
378 unit, including partial DIEs. */
379 struct obstack comp_unit_obstack
;
381 /* When multiple dwarf2_cu structures are living in memory, this field
382 chains them all together, so that they can be released efficiently.
383 We will probably also want a generation counter so that most-recently-used
384 compilation units are cached... */
385 struct dwarf2_per_cu_data
*read_in_chain
;
387 /* Backchain to our per_cu entry if the tree has been built. */
388 struct dwarf2_per_cu_data
*per_cu
;
390 /* How many compilation units ago was this CU last referenced? */
393 /* A hash table of DIE cu_offset for following references with
394 die_info->offset.sect_off as hash. */
397 /* Full DIEs if read in. */
398 struct die_info
*dies
;
400 /* A set of pointers to dwarf2_per_cu_data objects for compilation
401 units referenced by this one. Only set during full symbol processing;
402 partial symbol tables do not have dependencies. */
405 /* Header data from the line table, during full symbol processing. */
406 struct line_header
*line_header
;
408 /* A list of methods which need to have physnames computed
409 after all type information has been read. */
410 VEC (delayed_method_info
) *method_list
;
412 /* To be copied to symtab->call_site_htab. */
413 htab_t call_site_htab
;
415 /* Non-NULL if this CU came from a DWO file.
416 There is an invariant here that is important to remember:
417 Except for attributes copied from the top level DIE in the "main"
418 (or "stub") file in preparation for reading the DWO file
419 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
420 Either there isn't a DWO file (in which case this is NULL and the point
421 is moot), or there is and either we're not going to read it (in which
422 case this is NULL) or there is and we are reading it (in which case this
424 struct dwo_unit
*dwo_unit
;
426 /* The DW_AT_addr_base attribute if present, zero otherwise
427 (zero is a valid value though).
428 Note this value comes from the stub CU/TU's DIE. */
431 /* Mark used when releasing cached dies. */
432 unsigned int mark
: 1;
434 /* This CU references .debug_loc. See the symtab->locations_valid field.
435 This test is imperfect as there may exist optimized debug code not using
436 any location list and still facing inlining issues if handled as
437 unoptimized code. For a future better test see GCC PR other/32998. */
438 unsigned int has_loclist
: 1;
440 /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
441 CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
442 are valid. This information is cached because profiling CU expansion
443 showed excessive time spent in producer_is_gxx_lt_4_6. */
444 unsigned int checked_producer
: 1;
445 unsigned int producer_is_gxx_lt_4_6
: 1;
446 unsigned int producer_is_icc
: 1;
448 /* Non-zero if DW_AT_addr_base was found.
449 Used when processing DWO files. */
450 unsigned int have_addr_base
: 1;
453 /* Persistent data held for a compilation unit, even when not
454 processing it. We put a pointer to this structure in the
455 read_symtab_private field of the psymtab. */
457 struct dwarf2_per_cu_data
459 /* The start offset and length of this compilation unit. 2**29-1
460 bytes should suffice to store the length of any compilation unit
461 - if it doesn't, GDB will fall over anyway.
462 NOTE: Unlike comp_unit_head.length, this length includes
464 If the DIE refers to a DWO file, this is always of the original die,
467 unsigned int length
: 29;
469 /* Flag indicating this compilation unit will be read in before
470 any of the current compilation units are processed. */
471 unsigned int queued
: 1;
473 /* This flag will be set when reading partial DIEs if we need to load
474 absolutely all DIEs for this compilation unit, instead of just the ones
475 we think are interesting. It gets set if we look for a DIE in the
476 hash table and don't find it. */
477 unsigned int load_all_dies
: 1;
479 /* Non-zero if this CU is from .debug_types. */
480 unsigned int is_debug_types
: 1;
482 /* The section this CU/TU lives in.
483 If the DIE refers to a DWO file, this is always the original die,
485 struct dwarf2_section_info
*info_or_types_section
;
487 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
488 of the CU cache it gets reset to NULL again. */
489 struct dwarf2_cu
*cu
;
491 /* The corresponding objfile.
492 Normally we can get the objfile from dwarf2_per_objfile.
493 However we can enter this file with just a "per_cu" handle. */
494 struct objfile
*objfile
;
496 /* When using partial symbol tables, the 'psymtab' field is active.
497 Otherwise the 'quick' field is active. */
500 /* The partial symbol table associated with this compilation unit,
501 or NULL for unread partial units. */
502 struct partial_symtab
*psymtab
;
504 /* Data needed by the "quick" functions. */
505 struct dwarf2_per_cu_quick_data
*quick
;
508 /* The CUs we import using DW_TAG_imported_unit. This is filled in
509 while reading psymtabs, used to compute the psymtab dependencies,
510 and then cleared. Then it is filled in again while reading full
511 symbols, and only deleted when the objfile is destroyed. */
512 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
515 /* Entry in the signatured_types hash table. */
517 struct signatured_type
519 /* The type's signature. */
522 /* Offset in the TU of the type's DIE, as read from the TU header.
523 If the definition lives in a DWO file, this value is unusable. */
524 cu_offset type_offset_in_tu
;
526 /* Offset in the section of the type's DIE.
527 If the definition lives in a DWO file, this is the offset in the
528 .debug_types.dwo section.
529 The value is zero until the actual value is known.
530 Zero is otherwise not a valid section offset. */
531 sect_offset type_offset_in_section
;
533 /* The CU(/TU) of this type. */
534 struct dwarf2_per_cu_data per_cu
;
537 /* These sections are what may appear in a "dwo" file. */
541 struct dwarf2_section_info abbrev
;
542 struct dwarf2_section_info info
;
543 struct dwarf2_section_info line
;
544 struct dwarf2_section_info loc
;
545 struct dwarf2_section_info str
;
546 struct dwarf2_section_info str_offsets
;
547 VEC (dwarf2_section_info_def
) *types
;
550 /* Common bits of DWO CUs/TUs. */
554 /* Backlink to the containing struct dwo_file. */
555 struct dwo_file
*dwo_file
;
557 /* The "id" that distinguishes this CU/TU.
558 .debug_info calls this "dwo_id", .debug_types calls this "signature".
559 Since signatures came first, we stick with it for consistency. */
562 /* The section this CU/TU lives in, in the DWO file. */
563 struct dwarf2_section_info
*info_or_types_section
;
565 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
569 /* For types, offset in the type's DIE of the type defined by this TU. */
570 cu_offset type_offset_in_tu
;
573 /* Data for one DWO file. */
577 /* The DW_AT_GNU_dwo_name attribute.
578 We don't manage space for this, it's an attribute. */
579 const char *dwo_name
;
581 /* The bfd, when the file is open. Otherwise this is NULL. */
584 /* Section info for this file. */
585 struct dwo_sections sections
;
587 /* Table of CUs in the file.
588 Each element is a struct dwo_unit. */
591 /* Table of TUs in the file.
592 Each element is a struct dwo_unit. */
596 /* Struct used to pass misc. parameters to read_die_and_children, et
597 al. which are used for both .debug_info and .debug_types dies.
598 All parameters here are unchanging for the life of the call. This
599 struct exists to abstract away the constant parameters of die reading. */
601 struct die_reader_specs
603 /* die_section->asection->owner. */
606 /* The CU of the DIE we are parsing. */
607 struct dwarf2_cu
*cu
;
609 /* Non-NULL if reading a DWO file. */
610 struct dwo_file
*dwo_file
;
612 /* The section the die comes from.
613 This is either .debug_info or .debug_types, or the .dwo variants. */
614 struct dwarf2_section_info
*die_section
;
616 /* die_section->buffer. */
619 /* The end of the buffer. */
620 const gdb_byte
*buffer_end
;
623 /* Type of function passed to init_cutu_and_read_dies, et.al. */
624 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
626 struct die_info
*comp_unit_die
,
630 /* The line number information for a compilation unit (found in the
631 .debug_line section) begins with a "statement program header",
632 which contains the following information. */
635 unsigned int total_length
;
636 unsigned short version
;
637 unsigned int header_length
;
638 unsigned char minimum_instruction_length
;
639 unsigned char maximum_ops_per_instruction
;
640 unsigned char default_is_stmt
;
642 unsigned char line_range
;
643 unsigned char opcode_base
;
645 /* standard_opcode_lengths[i] is the number of operands for the
646 standard opcode whose value is i. This means that
647 standard_opcode_lengths[0] is unused, and the last meaningful
648 element is standard_opcode_lengths[opcode_base - 1]. */
649 unsigned char *standard_opcode_lengths
;
651 /* The include_directories table. NOTE! These strings are not
652 allocated with xmalloc; instead, they are pointers into
653 debug_line_buffer. If you try to free them, `free' will get
655 unsigned int num_include_dirs
, include_dirs_size
;
658 /* The file_names table. NOTE! These strings are not allocated
659 with xmalloc; instead, they are pointers into debug_line_buffer.
660 Don't try to free them directly. */
661 unsigned int num_file_names
, file_names_size
;
665 unsigned int dir_index
;
666 unsigned int mod_time
;
668 int included_p
; /* Non-zero if referenced by the Line Number Program. */
669 struct symtab
*symtab
; /* The associated symbol table, if any. */
672 /* The start and end of the statement program following this
673 header. These point into dwarf2_per_objfile->line_buffer. */
674 gdb_byte
*statement_program_start
, *statement_program_end
;
677 /* When we construct a partial symbol table entry we only
678 need this much information. */
679 struct partial_die_info
681 /* Offset of this DIE. */
684 /* DWARF-2 tag for this DIE. */
685 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
687 /* Assorted flags describing the data found in this DIE. */
688 unsigned int has_children
: 1;
689 unsigned int is_external
: 1;
690 unsigned int is_declaration
: 1;
691 unsigned int has_type
: 1;
692 unsigned int has_specification
: 1;
693 unsigned int has_pc_info
: 1;
694 unsigned int may_be_inlined
: 1;
696 /* Flag set if the SCOPE field of this structure has been
698 unsigned int scope_set
: 1;
700 /* Flag set if the DIE has a byte_size attribute. */
701 unsigned int has_byte_size
: 1;
703 /* Flag set if any of the DIE's children are template arguments. */
704 unsigned int has_template_arguments
: 1;
706 /* Flag set if fixup_partial_die has been called on this die. */
707 unsigned int fixup_called
: 1;
709 /* The name of this DIE. Normally the value of DW_AT_name, but
710 sometimes a default name for unnamed DIEs. */
713 /* The linkage name, if present. */
714 const char *linkage_name
;
716 /* The scope to prepend to our children. This is generally
717 allocated on the comp_unit_obstack, so will disappear
718 when this compilation unit leaves the cache. */
721 /* Some data associated with the partial DIE. The tag determines
722 which field is live. */
725 /* The location description associated with this DIE, if any. */
726 struct dwarf_block
*locdesc
;
727 /* The offset of an import, for DW_TAG_imported_unit. */
731 /* If HAS_PC_INFO, the PC range associated with this DIE. */
735 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
736 DW_AT_sibling, if any. */
737 /* NOTE: This member isn't strictly necessary, read_partial_die could
738 return DW_AT_sibling values to its caller load_partial_dies. */
741 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
742 DW_AT_specification (or DW_AT_abstract_origin or
744 sect_offset spec_offset
;
746 /* Pointers to this DIE's parent, first child, and next sibling,
748 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
751 /* This data structure holds the information of an abbrev. */
754 unsigned int number
; /* number identifying abbrev */
755 enum dwarf_tag tag
; /* dwarf tag */
756 unsigned short has_children
; /* boolean */
757 unsigned short num_attrs
; /* number of attributes */
758 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
759 struct abbrev_info
*next
; /* next in chain */
764 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
765 ENUM_BITFIELD(dwarf_form
) form
: 16;
768 /* Attributes have a name and a value. */
771 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
772 ENUM_BITFIELD(dwarf_form
) form
: 15;
774 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
775 field should be in u.str (existing only for DW_STRING) but it is kept
776 here for better struct attribute alignment. */
777 unsigned int string_is_canonical
: 1;
782 struct dwarf_block
*blk
;
786 struct signatured_type
*signatured_type
;
791 /* This data structure holds a complete die structure. */
794 /* DWARF-2 tag for this DIE. */
795 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
797 /* Number of attributes */
798 unsigned char num_attrs
;
800 /* True if we're presently building the full type name for the
801 type derived from this DIE. */
802 unsigned char building_fullname
: 1;
807 /* Offset in .debug_info or .debug_types section. */
810 /* The dies in a compilation unit form an n-ary tree. PARENT
811 points to this die's parent; CHILD points to the first child of
812 this node; and all the children of a given node are chained
813 together via their SIBLING fields. */
814 struct die_info
*child
; /* Its first child, if any. */
815 struct die_info
*sibling
; /* Its next sibling, if any. */
816 struct die_info
*parent
; /* Its parent, if any. */
818 /* An array of attributes, with NUM_ATTRS elements. There may be
819 zero, but it's not common and zero-sized arrays are not
820 sufficiently portable C. */
821 struct attribute attrs
[1];
824 /* Get at parts of an attribute structure. */
826 #define DW_STRING(attr) ((attr)->u.str)
827 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
828 #define DW_UNSND(attr) ((attr)->u.unsnd)
829 #define DW_BLOCK(attr) ((attr)->u.blk)
830 #define DW_SND(attr) ((attr)->u.snd)
831 #define DW_ADDR(attr) ((attr)->u.addr)
832 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
834 /* Blocks are a bunch of untyped bytes. */
839 /* Valid only if SIZE is not zero. */
843 #ifndef ATTR_ALLOC_CHUNK
844 #define ATTR_ALLOC_CHUNK 4
847 /* Allocate fields for structs, unions and enums in this size. */
848 #ifndef DW_FIELD_ALLOC_CHUNK
849 #define DW_FIELD_ALLOC_CHUNK 4
852 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
853 but this would require a corresponding change in unpack_field_as_long
855 static int bits_per_byte
= 8;
857 /* The routines that read and process dies for a C struct or C++ class
858 pass lists of data member fields and lists of member function fields
859 in an instance of a field_info structure, as defined below. */
862 /* List of data member and baseclasses fields. */
865 struct nextfield
*next
;
870 *fields
, *baseclasses
;
872 /* Number of fields (including baseclasses). */
875 /* Number of baseclasses. */
878 /* Set if the accesibility of one of the fields is not public. */
879 int non_public_fields
;
881 /* Member function fields array, entries are allocated in the order they
882 are encountered in the object file. */
885 struct nextfnfield
*next
;
886 struct fn_field fnfield
;
890 /* Member function fieldlist array, contains name of possibly overloaded
891 member function, number of overloaded member functions and a pointer
892 to the head of the member function field chain. */
897 struct nextfnfield
*head
;
901 /* Number of entries in the fnfieldlists array. */
904 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
905 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
906 struct typedef_field_list
908 struct typedef_field field
;
909 struct typedef_field_list
*next
;
912 unsigned typedef_field_list_count
;
915 /* One item on the queue of compilation units to read in full symbols
917 struct dwarf2_queue_item
919 struct dwarf2_per_cu_data
*per_cu
;
920 enum language pretend_language
;
921 struct dwarf2_queue_item
*next
;
924 /* The current queue. */
925 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
927 /* Loaded secondary compilation units are kept in memory until they
928 have not been referenced for the processing of this many
929 compilation units. Set this to zero to disable caching. Cache
930 sizes of up to at least twenty will improve startup time for
931 typical inter-CU-reference binaries, at an obvious memory cost. */
932 static int dwarf2_max_cache_age
= 5;
934 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
935 struct cmd_list_element
*c
, const char *value
)
937 fprintf_filtered (file
, _("The upper bound on the age of cached "
938 "dwarf2 compilation units is %s.\n"),
943 /* Various complaints about symbol reading that don't abort the process. */
946 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
948 complaint (&symfile_complaints
,
949 _("statement list doesn't fit in .debug_line section"));
953 dwarf2_debug_line_missing_file_complaint (void)
955 complaint (&symfile_complaints
,
956 _(".debug_line section has line data without a file"));
960 dwarf2_debug_line_missing_end_sequence_complaint (void)
962 complaint (&symfile_complaints
,
963 _(".debug_line section has line "
964 "program sequence without an end"));
968 dwarf2_complex_location_expr_complaint (void)
970 complaint (&symfile_complaints
, _("location expression too complex"));
974 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
977 complaint (&symfile_complaints
,
978 _("const value length mismatch for '%s', got %d, expected %d"),
983 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
985 complaint (&symfile_complaints
,
986 _("debug info runs off end of %s section"
988 section
->asection
->name
,
989 bfd_get_filename (section
->asection
->owner
));
993 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
995 complaint (&symfile_complaints
,
996 _("macro debug info contains a "
997 "malformed macro definition:\n`%s'"),
1002 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1004 complaint (&symfile_complaints
,
1005 _("invalid attribute class or form for '%s' in '%s'"),
1009 /* local function prototypes */
1011 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1013 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1016 static void dwarf2_find_base_address (struct die_info
*die
,
1017 struct dwarf2_cu
*cu
);
1019 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1021 static void scan_partial_symbols (struct partial_die_info
*,
1022 CORE_ADDR
*, CORE_ADDR
*,
1023 int, struct dwarf2_cu
*);
1025 static void add_partial_symbol (struct partial_die_info
*,
1026 struct dwarf2_cu
*);
1028 static void add_partial_namespace (struct partial_die_info
*pdi
,
1029 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1030 int need_pc
, struct dwarf2_cu
*cu
);
1032 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1033 CORE_ADDR
*highpc
, int need_pc
,
1034 struct dwarf2_cu
*cu
);
1036 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1037 struct dwarf2_cu
*cu
);
1039 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1040 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1041 int need_pc
, struct dwarf2_cu
*cu
);
1043 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
1045 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1047 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1048 struct dwarf2_section_info
*);
1050 static void dwarf2_free_abbrev_table (void *);
1052 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1054 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
1055 struct dwarf2_cu
*);
1057 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
1058 struct dwarf2_cu
*);
1060 static struct partial_die_info
*load_partial_dies
1061 (const struct die_reader_specs
*, gdb_byte
*, int);
1063 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1064 struct partial_die_info
*,
1065 struct abbrev_info
*,
1069 static struct partial_die_info
*find_partial_die (sect_offset
,
1070 struct dwarf2_cu
*);
1072 static void fixup_partial_die (struct partial_die_info
*,
1073 struct dwarf2_cu
*);
1075 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1076 struct attribute
*, struct attr_abbrev
*,
1079 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
1081 static int read_1_signed_byte (bfd
*, gdb_byte
*);
1083 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
1085 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
1087 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
1089 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1092 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1094 static LONGEST read_checked_initial_length_and_offset
1095 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1096 unsigned int *, unsigned int *);
1098 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1101 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1103 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1105 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1107 static char *read_indirect_string (bfd
*, gdb_byte
*,
1108 const struct comp_unit_head
*,
1111 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1113 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1115 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1118 static char *read_str_index (const struct die_reader_specs
*reader
,
1119 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1121 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1123 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1124 struct dwarf2_cu
*);
1126 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1128 struct dwarf2_cu
*);
1130 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1131 struct dwarf2_cu
*cu
);
1133 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1135 static struct die_info
*die_specification (struct die_info
*die
,
1136 struct dwarf2_cu
**);
1138 static void free_line_header (struct line_header
*lh
);
1140 static void add_file_name (struct line_header
*, char *, unsigned int,
1141 unsigned int, unsigned int);
1143 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1144 struct dwarf2_cu
*cu
);
1146 static void dwarf_decode_lines (struct line_header
*, const char *,
1147 struct dwarf2_cu
*, struct partial_symtab
*,
1150 static void dwarf2_start_subfile (char *, const char *, const char *);
1152 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1153 struct dwarf2_cu
*);
1155 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1156 struct dwarf2_cu
*, struct symbol
*);
1158 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1159 struct dwarf2_cu
*);
1161 static void dwarf2_const_value_attr (struct attribute
*attr
,
1164 struct obstack
*obstack
,
1165 struct dwarf2_cu
*cu
, LONGEST
*value
,
1167 struct dwarf2_locexpr_baton
**baton
);
1169 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1171 static int need_gnat_info (struct dwarf2_cu
*);
1173 static struct type
*die_descriptive_type (struct die_info
*,
1174 struct dwarf2_cu
*);
1176 static void set_descriptive_type (struct type
*, struct die_info
*,
1177 struct dwarf2_cu
*);
1179 static struct type
*die_containing_type (struct die_info
*,
1180 struct dwarf2_cu
*);
1182 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1183 struct dwarf2_cu
*);
1185 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1187 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1189 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1191 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1192 const char *suffix
, int physname
,
1193 struct dwarf2_cu
*cu
);
1195 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1197 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1199 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1201 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1203 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1205 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1206 struct dwarf2_cu
*, struct partial_symtab
*);
1208 static int dwarf2_get_pc_bounds (struct die_info
*,
1209 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1210 struct partial_symtab
*);
1212 static void get_scope_pc_bounds (struct die_info
*,
1213 CORE_ADDR
*, CORE_ADDR
*,
1214 struct dwarf2_cu
*);
1216 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1217 CORE_ADDR
, struct dwarf2_cu
*);
1219 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1220 struct dwarf2_cu
*);
1222 static void dwarf2_attach_fields_to_type (struct field_info
*,
1223 struct type
*, struct dwarf2_cu
*);
1225 static void dwarf2_add_member_fn (struct field_info
*,
1226 struct die_info
*, struct type
*,
1227 struct dwarf2_cu
*);
1229 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1231 struct dwarf2_cu
*);
1233 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1235 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1237 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1239 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1241 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1243 static struct type
*read_module_type (struct die_info
*die
,
1244 struct dwarf2_cu
*cu
);
1246 static const char *namespace_name (struct die_info
*die
,
1247 int *is_anonymous
, struct dwarf2_cu
*);
1249 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1251 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1253 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1254 struct dwarf2_cu
*);
1256 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1258 gdb_byte
**new_info_ptr
,
1259 struct die_info
*parent
);
1261 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1263 gdb_byte
**new_info_ptr
,
1264 struct die_info
*parent
);
1266 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1267 struct die_info
**, gdb_byte
*, int *, int);
1269 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1270 struct die_info
**, gdb_byte
*, int *);
1272 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1274 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1277 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1279 static const char *dwarf2_full_name (char *name
,
1280 struct die_info
*die
,
1281 struct dwarf2_cu
*cu
);
1283 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1284 struct dwarf2_cu
**);
1286 static const char *dwarf_tag_name (unsigned int);
1288 static const char *dwarf_attr_name (unsigned int);
1290 static const char *dwarf_form_name (unsigned int);
1292 static char *dwarf_bool_name (unsigned int);
1294 static const char *dwarf_type_encoding_name (unsigned int);
1296 static struct die_info
*sibling_die (struct die_info
*);
1298 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1300 static void dump_die_for_error (struct die_info
*);
1302 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1305 /*static*/ void dump_die (struct die_info
*, int max_level
);
1307 static void store_in_ref_table (struct die_info
*,
1308 struct dwarf2_cu
*);
1310 static int is_ref_attr (struct attribute
*);
1312 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1314 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1316 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1318 struct dwarf2_cu
**);
1320 static struct die_info
*follow_die_ref (struct die_info
*,
1322 struct dwarf2_cu
**);
1324 static struct die_info
*follow_die_sig (struct die_info
*,
1326 struct dwarf2_cu
**);
1328 static struct signatured_type
*lookup_signatured_type_at_offset
1329 (struct objfile
*objfile
,
1330 struct dwarf2_section_info
*section
, sect_offset offset
);
1332 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1334 static void read_signatured_type (struct signatured_type
*);
1336 /* memory allocation interface */
1338 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1340 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1342 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1344 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1345 char *, bfd
*, struct dwarf2_cu
*,
1346 struct dwarf2_section_info
*,
1349 static int attr_form_is_block (struct attribute
*);
1351 static int attr_form_is_section_offset (struct attribute
*);
1353 static int attr_form_is_constant (struct attribute
*);
1355 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1356 struct dwarf2_loclist_baton
*baton
,
1357 struct attribute
*attr
);
1359 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1361 struct dwarf2_cu
*cu
);
1363 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1365 struct abbrev_info
*abbrev
);
1367 static void free_stack_comp_unit (void *);
1369 static hashval_t
partial_die_hash (const void *item
);
1371 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1373 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1374 (sect_offset offset
, struct objfile
*objfile
);
1376 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1377 struct dwarf2_per_cu_data
*per_cu
);
1379 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1380 struct die_info
*comp_unit_die
,
1381 enum language pretend_language
);
1383 static void free_heap_comp_unit (void *);
1385 static void free_cached_comp_units (void *);
1387 static void age_cached_comp_units (void);
1389 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1391 static struct type
*set_die_type (struct die_info
*, struct type
*,
1392 struct dwarf2_cu
*);
1394 static void create_all_comp_units (struct objfile
*);
1396 static int create_all_type_units (struct objfile
*);
1398 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1401 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1404 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1405 struct dwarf2_per_cu_data
*);
1407 static void dwarf2_mark (struct dwarf2_cu
*);
1409 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1411 static struct type
*get_die_type_at_offset (sect_offset
,
1412 struct dwarf2_per_cu_data
*per_cu
);
1414 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1416 static void dwarf2_release_queue (void *dummy
);
1418 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1419 enum language pretend_language
);
1421 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1422 struct dwarf2_per_cu_data
*per_cu
,
1423 enum language pretend_language
);
1425 static void process_queue (void);
1427 static void find_file_and_directory (struct die_info
*die
,
1428 struct dwarf2_cu
*cu
,
1429 char **name
, char **comp_dir
);
1431 static char *file_full_name (int file
, struct line_header
*lh
,
1432 const char *comp_dir
);
1434 static gdb_byte
*read_and_check_comp_unit_head
1435 (struct comp_unit_head
*header
,
1436 struct dwarf2_section_info
*section
, gdb_byte
*info_ptr
,
1437 int is_debug_types_section
);
1439 static void init_cutu_and_read_dies
1440 (struct dwarf2_per_cu_data
*this_cu
, int use_existing_cu
, int keep
,
1441 die_reader_func_ftype
*die_reader_func
, void *data
);
1443 static void init_cutu_and_read_dies_simple
1444 (struct dwarf2_per_cu_data
*this_cu
,
1445 die_reader_func_ftype
*die_reader_func
, void *data
);
1447 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1449 static void process_psymtab_comp_unit (struct dwarf2_per_cu_data
*, int);
1451 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1453 static struct dwo_unit
*lookup_dwo_comp_unit
1454 (struct dwarf2_per_cu_data
*, char *, const char *, ULONGEST
);
1456 static struct dwo_unit
*lookup_dwo_type_unit
1457 (struct signatured_type
*, char *, const char *);
1459 static void free_dwo_file_cleanup (void *);
1461 static void munmap_section_buffer (struct dwarf2_section_info
*);
1463 static void process_cu_includes (void);
1467 /* Convert VALUE between big- and little-endian. */
1469 byte_swap (offset_type value
)
1473 result
= (value
& 0xff) << 24;
1474 result
|= (value
& 0xff00) << 8;
1475 result
|= (value
& 0xff0000) >> 8;
1476 result
|= (value
& 0xff000000) >> 24;
1480 #define MAYBE_SWAP(V) byte_swap (V)
1483 #define MAYBE_SWAP(V) (V)
1484 #endif /* WORDS_BIGENDIAN */
1486 /* The suffix for an index file. */
1487 #define INDEX_SUFFIX ".gdb-index"
1489 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1490 struct dwarf2_cu
*cu
);
1492 /* Try to locate the sections we need for DWARF 2 debugging
1493 information and return true if we have enough to do something.
1494 NAMES points to the dwarf2 section names, or is NULL if the standard
1495 ELF names are used. */
1498 dwarf2_has_info (struct objfile
*objfile
,
1499 const struct dwarf2_debug_sections
*names
)
1501 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1502 if (!dwarf2_per_objfile
)
1504 /* Initialize per-objfile state. */
1505 struct dwarf2_per_objfile
*data
1506 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1508 memset (data
, 0, sizeof (*data
));
1509 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1510 dwarf2_per_objfile
= data
;
1512 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1514 dwarf2_per_objfile
->objfile
= objfile
;
1516 return (dwarf2_per_objfile
->info
.asection
!= NULL
1517 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1520 /* When loading sections, we look either for uncompressed section or for
1521 compressed section names. */
1524 section_is_p (const char *section_name
,
1525 const struct dwarf2_section_names
*names
)
1527 if (names
->normal
!= NULL
1528 && strcmp (section_name
, names
->normal
) == 0)
1530 if (names
->compressed
!= NULL
1531 && strcmp (section_name
, names
->compressed
) == 0)
1536 /* This function is mapped across the sections and remembers the
1537 offset and size of each of the debugging sections we are interested
1541 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1543 const struct dwarf2_debug_sections
*names
;
1546 names
= &dwarf2_elf_names
;
1548 names
= (const struct dwarf2_debug_sections
*) vnames
;
1550 if (section_is_p (sectp
->name
, &names
->info
))
1552 dwarf2_per_objfile
->info
.asection
= sectp
;
1553 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1555 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1557 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1558 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1560 else if (section_is_p (sectp
->name
, &names
->line
))
1562 dwarf2_per_objfile
->line
.asection
= sectp
;
1563 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1565 else if (section_is_p (sectp
->name
, &names
->loc
))
1567 dwarf2_per_objfile
->loc
.asection
= sectp
;
1568 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1570 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1572 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1573 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1575 else if (section_is_p (sectp
->name
, &names
->macro
))
1577 dwarf2_per_objfile
->macro
.asection
= sectp
;
1578 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1580 else if (section_is_p (sectp
->name
, &names
->str
))
1582 dwarf2_per_objfile
->str
.asection
= sectp
;
1583 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1585 else if (section_is_p (sectp
->name
, &names
->addr
))
1587 dwarf2_per_objfile
->addr
.asection
= sectp
;
1588 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1590 else if (section_is_p (sectp
->name
, &names
->frame
))
1592 dwarf2_per_objfile
->frame
.asection
= sectp
;
1593 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1595 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1597 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1599 if (aflag
& SEC_HAS_CONTENTS
)
1601 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1602 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1605 else if (section_is_p (sectp
->name
, &names
->ranges
))
1607 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1608 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1610 else if (section_is_p (sectp
->name
, &names
->types
))
1612 struct dwarf2_section_info type_section
;
1614 memset (&type_section
, 0, sizeof (type_section
));
1615 type_section
.asection
= sectp
;
1616 type_section
.size
= bfd_get_section_size (sectp
);
1618 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1621 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1623 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1624 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1627 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1628 && bfd_section_vma (abfd
, sectp
) == 0)
1629 dwarf2_per_objfile
->has_section_at_zero
= 1;
1632 /* Decompress a section that was compressed using zlib. Store the
1633 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1636 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1637 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1639 bfd
*abfd
= sectp
->owner
;
1641 error (_("Support for zlib-compressed DWARF data (from '%s') "
1642 "is disabled in this copy of GDB"),
1643 bfd_get_filename (abfd
));
1645 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1646 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1647 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1648 bfd_size_type uncompressed_size
;
1649 gdb_byte
*uncompressed_buffer
;
1652 int header_size
= 12;
1654 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1655 || bfd_bread (compressed_buffer
,
1656 compressed_size
, abfd
) != compressed_size
)
1657 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1658 bfd_get_filename (abfd
));
1660 /* Read the zlib header. In this case, it should be "ZLIB" followed
1661 by the uncompressed section size, 8 bytes in big-endian order. */
1662 if (compressed_size
< header_size
1663 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1664 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1665 bfd_get_filename (abfd
));
1666 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1667 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1668 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1669 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1670 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1671 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1672 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1673 uncompressed_size
+= compressed_buffer
[11];
1675 /* It is possible the section consists of several compressed
1676 buffers concatenated together, so we uncompress in a loop. */
1680 strm
.avail_in
= compressed_size
- header_size
;
1681 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1682 strm
.avail_out
= uncompressed_size
;
1683 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1685 rc
= inflateInit (&strm
);
1686 while (strm
.avail_in
> 0)
1689 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1690 bfd_get_filename (abfd
), rc
);
1691 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1692 + (uncompressed_size
- strm
.avail_out
));
1693 rc
= inflate (&strm
, Z_FINISH
);
1694 if (rc
!= Z_STREAM_END
)
1695 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1696 bfd_get_filename (abfd
), rc
);
1697 rc
= inflateReset (&strm
);
1699 rc
= inflateEnd (&strm
);
1701 || strm
.avail_out
!= 0)
1702 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1703 bfd_get_filename (abfd
), rc
);
1705 do_cleanups (cleanup
);
1706 *outbuf
= uncompressed_buffer
;
1707 *outsize
= uncompressed_size
;
1711 /* A helper function that decides whether a section is empty,
1715 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1717 return info
->asection
== NULL
|| info
->size
== 0;
1720 /* Read the contents of the section INFO.
1721 OBJFILE is the main object file, but not necessarily the file where
1722 the section comes from. E.g., for DWO files INFO->asection->owner
1723 is the bfd of the DWO file.
1724 If the section is compressed, uncompress it before returning. */
1727 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1729 asection
*sectp
= info
->asection
;
1731 gdb_byte
*buf
, *retbuf
;
1732 unsigned char header
[4];
1736 info
->buffer
= NULL
;
1737 info
->map_addr
= NULL
;
1740 if (dwarf2_section_empty_p (info
))
1743 /* Note that ABFD may not be from OBJFILE, e.g. a DWO section. */
1744 abfd
= sectp
->owner
;
1746 /* Check if the file has a 4-byte header indicating compression. */
1747 if (info
->size
> sizeof (header
)
1748 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1749 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1751 /* Upon decompression, update the buffer and its size. */
1752 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1754 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1762 pagesize
= getpagesize ();
1764 /* Only try to mmap sections which are large enough: we don't want to
1765 waste space due to fragmentation. Also, only try mmap for sections
1766 without relocations. */
1768 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1770 info
->buffer
= bfd_mmap (abfd
, 0, info
->size
, PROT_READ
,
1771 MAP_PRIVATE
, sectp
->filepos
,
1772 &info
->map_addr
, &info
->map_len
);
1774 if ((caddr_t
)info
->buffer
!= MAP_FAILED
)
1776 #if HAVE_POSIX_MADVISE
1777 posix_madvise (info
->map_addr
, info
->map_len
, POSIX_MADV_WILLNEED
);
1784 /* If we get here, we are a normal, not-compressed section. */
1786 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1788 /* When debugging .o files, we may need to apply relocations; see
1789 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1790 We never compress sections in .o files, so we only need to
1791 try this when the section is not compressed. */
1792 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1795 info
->buffer
= retbuf
;
1799 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1800 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1801 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1802 bfd_get_filename (abfd
));
1805 /* A helper function that returns the size of a section in a safe way.
1806 If you are positive that the section has been read before using the
1807 size, then it is safe to refer to the dwarf2_section_info object's
1808 "size" field directly. In other cases, you must call this
1809 function, because for compressed sections the size field is not set
1810 correctly until the section has been read. */
1812 static bfd_size_type
1813 dwarf2_section_size (struct objfile
*objfile
,
1814 struct dwarf2_section_info
*info
)
1817 dwarf2_read_section (objfile
, info
);
1821 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1825 dwarf2_get_section_info (struct objfile
*objfile
,
1826 enum dwarf2_section_enum sect
,
1827 asection
**sectp
, gdb_byte
**bufp
,
1828 bfd_size_type
*sizep
)
1830 struct dwarf2_per_objfile
*data
1831 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1832 struct dwarf2_section_info
*info
;
1834 /* We may see an objfile without any DWARF, in which case we just
1845 case DWARF2_DEBUG_FRAME
:
1846 info
= &data
->frame
;
1848 case DWARF2_EH_FRAME
:
1849 info
= &data
->eh_frame
;
1852 gdb_assert_not_reached ("unexpected section");
1855 dwarf2_read_section (objfile
, info
);
1857 *sectp
= info
->asection
;
1858 *bufp
= info
->buffer
;
1859 *sizep
= info
->size
;
1863 /* DWARF quick_symbols_functions support. */
1865 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1866 unique line tables, so we maintain a separate table of all .debug_line
1867 derived entries to support the sharing.
1868 All the quick functions need is the list of file names. We discard the
1869 line_header when we're done and don't need to record it here. */
1870 struct quick_file_names
1872 /* The offset in .debug_line of the line table. We hash on this. */
1873 unsigned int offset
;
1875 /* The number of entries in file_names, real_names. */
1876 unsigned int num_file_names
;
1878 /* The file names from the line table, after being run through
1880 const char **file_names
;
1882 /* The file names from the line table after being run through
1883 gdb_realpath. These are computed lazily. */
1884 const char **real_names
;
1887 /* When using the index (and thus not using psymtabs), each CU has an
1888 object of this type. This is used to hold information needed by
1889 the various "quick" methods. */
1890 struct dwarf2_per_cu_quick_data
1892 /* The file table. This can be NULL if there was no file table
1893 or it's currently not read in.
1894 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1895 struct quick_file_names
*file_names
;
1897 /* The corresponding symbol table. This is NULL if symbols for this
1898 CU have not yet been read. */
1899 struct symtab
*symtab
;
1901 /* A temporary mark bit used when iterating over all CUs in
1902 expand_symtabs_matching. */
1903 unsigned int mark
: 1;
1905 /* True if we've tried to read the file table and found there isn't one.
1906 There will be no point in trying to read it again next time. */
1907 unsigned int no_file_data
: 1;
1910 /* Hash function for a quick_file_names. */
1913 hash_file_name_entry (const void *e
)
1915 const struct quick_file_names
*file_data
= e
;
1917 return file_data
->offset
;
1920 /* Equality function for a quick_file_names. */
1923 eq_file_name_entry (const void *a
, const void *b
)
1925 const struct quick_file_names
*ea
= a
;
1926 const struct quick_file_names
*eb
= b
;
1928 return ea
->offset
== eb
->offset
;
1931 /* Delete function for a quick_file_names. */
1934 delete_file_name_entry (void *e
)
1936 struct quick_file_names
*file_data
= e
;
1939 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1941 xfree ((void*) file_data
->file_names
[i
]);
1942 if (file_data
->real_names
)
1943 xfree ((void*) file_data
->real_names
[i
]);
1946 /* The space for the struct itself lives on objfile_obstack,
1947 so we don't free it here. */
1950 /* Create a quick_file_names hash table. */
1953 create_quick_file_names_table (unsigned int nr_initial_entries
)
1955 return htab_create_alloc (nr_initial_entries
,
1956 hash_file_name_entry
, eq_file_name_entry
,
1957 delete_file_name_entry
, xcalloc
, xfree
);
1960 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
1961 have to be created afterwards. You should call age_cached_comp_units after
1962 processing PER_CU->CU. dw2_setup must have been already called. */
1965 load_cu (struct dwarf2_per_cu_data
*per_cu
)
1967 if (per_cu
->is_debug_types
)
1968 load_full_type_unit (per_cu
);
1970 load_full_comp_unit (per_cu
, language_minimal
);
1972 gdb_assert (per_cu
->cu
!= NULL
);
1974 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
1977 /* Read in the symbols for PER_CU. */
1980 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1982 struct cleanup
*back_to
;
1984 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1986 if (dwarf2_per_objfile
->using_index
1987 ? per_cu
->v
.quick
->symtab
== NULL
1988 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
1990 queue_comp_unit (per_cu
, language_minimal
);
1996 /* Age the cache, releasing compilation units that have not
1997 been used recently. */
1998 age_cached_comp_units ();
2000 do_cleanups (back_to
);
2003 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2004 the objfile from which this CU came. Returns the resulting symbol
2007 static struct symtab
*
2008 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2010 gdb_assert (dwarf2_per_objfile
->using_index
);
2011 if (!per_cu
->v
.quick
->symtab
)
2013 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2014 increment_reading_symtab ();
2015 dw2_do_instantiate_symtab (per_cu
);
2016 process_cu_includes ();
2017 do_cleanups (back_to
);
2019 return per_cu
->v
.quick
->symtab
;
2022 /* Return the CU given its index. */
2024 static struct dwarf2_per_cu_data
*
2025 dw2_get_cu (int index
)
2027 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2029 index
-= dwarf2_per_objfile
->n_comp_units
;
2030 return dwarf2_per_objfile
->all_type_units
[index
];
2032 return dwarf2_per_objfile
->all_comp_units
[index
];
2035 /* A helper function that knows how to read a 64-bit value in a way
2036 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
2040 extract_cu_value (const char *bytes
, ULONGEST
*result
)
2042 if (sizeof (ULONGEST
) < 8)
2046 /* Ignore the upper 4 bytes if they are all zero. */
2047 for (i
= 0; i
< 4; ++i
)
2048 if (bytes
[i
+ 4] != 0)
2051 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
2054 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2058 /* Read the CU list from the mapped index, and use it to create all
2059 the CU objects for this objfile. Return 0 if something went wrong,
2060 1 if everything went ok. */
2063 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
2064 offset_type cu_list_elements
)
2068 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
2069 dwarf2_per_objfile
->all_comp_units
2070 = obstack_alloc (&objfile
->objfile_obstack
,
2071 dwarf2_per_objfile
->n_comp_units
2072 * sizeof (struct dwarf2_per_cu_data
*));
2074 for (i
= 0; i
< cu_list_elements
; i
+= 2)
2076 struct dwarf2_per_cu_data
*the_cu
;
2077 ULONGEST offset
, length
;
2079 if (!extract_cu_value (cu_list
, &offset
)
2080 || !extract_cu_value (cu_list
+ 8, &length
))
2084 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2085 struct dwarf2_per_cu_data
);
2086 the_cu
->offset
.sect_off
= offset
;
2087 the_cu
->length
= length
;
2088 the_cu
->objfile
= objfile
;
2089 the_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
2090 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2091 struct dwarf2_per_cu_quick_data
);
2092 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
2098 /* Create the signatured type hash table from the index. */
2101 create_signatured_type_table_from_index (struct objfile
*objfile
,
2102 struct dwarf2_section_info
*section
,
2103 const gdb_byte
*bytes
,
2104 offset_type elements
)
2107 htab_t sig_types_hash
;
2109 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2110 dwarf2_per_objfile
->all_type_units
2111 = obstack_alloc (&objfile
->objfile_obstack
,
2112 dwarf2_per_objfile
->n_type_units
2113 * sizeof (struct dwarf2_per_cu_data
*));
2115 sig_types_hash
= allocate_signatured_type_table (objfile
);
2117 for (i
= 0; i
< elements
; i
+= 3)
2119 struct signatured_type
*sig_type
;
2120 ULONGEST offset
, type_offset_in_tu
, signature
;
2123 if (!extract_cu_value (bytes
, &offset
)
2124 || !extract_cu_value (bytes
+ 8, &type_offset_in_tu
))
2126 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2129 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2130 struct signatured_type
);
2131 sig_type
->signature
= signature
;
2132 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2133 sig_type
->per_cu
.is_debug_types
= 1;
2134 sig_type
->per_cu
.info_or_types_section
= section
;
2135 sig_type
->per_cu
.offset
.sect_off
= offset
;
2136 sig_type
->per_cu
.objfile
= objfile
;
2137 sig_type
->per_cu
.v
.quick
2138 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2139 struct dwarf2_per_cu_quick_data
);
2141 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2144 dwarf2_per_objfile
->all_type_units
[i
/ 3] = &sig_type
->per_cu
;
2147 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2152 /* Read the address map data from the mapped index, and use it to
2153 populate the objfile's psymtabs_addrmap. */
2156 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2158 const gdb_byte
*iter
, *end
;
2159 struct obstack temp_obstack
;
2160 struct addrmap
*mutable_map
;
2161 struct cleanup
*cleanup
;
2164 obstack_init (&temp_obstack
);
2165 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2166 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2168 iter
= index
->address_table
;
2169 end
= iter
+ index
->address_table_size
;
2171 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2175 ULONGEST hi
, lo
, cu_index
;
2176 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2178 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2180 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2183 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2184 dw2_get_cu (cu_index
));
2187 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2188 &objfile
->objfile_obstack
);
2189 do_cleanups (cleanup
);
2192 /* The hash function for strings in the mapped index. This is the same as
2193 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2194 implementation. This is necessary because the hash function is tied to the
2195 format of the mapped index file. The hash values do not have to match with
2198 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2201 mapped_index_string_hash (int index_version
, const void *p
)
2203 const unsigned char *str
= (const unsigned char *) p
;
2207 while ((c
= *str
++) != 0)
2209 if (index_version
>= 5)
2211 r
= r
* 67 + c
- 113;
2217 /* Find a slot in the mapped index INDEX for the object named NAME.
2218 If NAME is found, set *VEC_OUT to point to the CU vector in the
2219 constant pool and return 1. If NAME cannot be found, return 0. */
2222 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2223 offset_type
**vec_out
)
2225 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2227 offset_type slot
, step
;
2228 int (*cmp
) (const char *, const char *);
2230 if (current_language
->la_language
== language_cplus
2231 || current_language
->la_language
== language_java
2232 || current_language
->la_language
== language_fortran
)
2234 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2236 const char *paren
= strchr (name
, '(');
2242 dup
= xmalloc (paren
- name
+ 1);
2243 memcpy (dup
, name
, paren
- name
);
2244 dup
[paren
- name
] = 0;
2246 make_cleanup (xfree
, dup
);
2251 /* Index version 4 did not support case insensitive searches. But the
2252 indices for case insensitive languages are built in lowercase, therefore
2253 simulate our NAME being searched is also lowercased. */
2254 hash
= mapped_index_string_hash ((index
->version
== 4
2255 && case_sensitivity
== case_sensitive_off
2256 ? 5 : index
->version
),
2259 slot
= hash
& (index
->symbol_table_slots
- 1);
2260 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2261 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2265 /* Convert a slot number to an offset into the table. */
2266 offset_type i
= 2 * slot
;
2268 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2270 do_cleanups (back_to
);
2274 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2275 if (!cmp (name
, str
))
2277 *vec_out
= (offset_type
*) (index
->constant_pool
2278 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2279 do_cleanups (back_to
);
2283 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2287 /* Read the index file. If everything went ok, initialize the "quick"
2288 elements of all the CUs and return 1. Otherwise, return 0. */
2291 dwarf2_read_index (struct objfile
*objfile
)
2294 struct mapped_index
*map
;
2295 offset_type
*metadata
;
2296 const gdb_byte
*cu_list
;
2297 const gdb_byte
*types_list
= NULL
;
2298 offset_type version
, cu_list_elements
;
2299 offset_type types_list_elements
= 0;
2302 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2305 /* Older elfutils strip versions could keep the section in the main
2306 executable while splitting it for the separate debug info file. */
2307 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2308 & SEC_HAS_CONTENTS
) == 0)
2311 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2313 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2314 /* Version check. */
2315 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2316 /* Versions earlier than 3 emitted every copy of a psymbol. This
2317 causes the index to behave very poorly for certain requests. Version 3
2318 contained incomplete addrmap. So, it seems better to just ignore such
2322 static int warning_printed
= 0;
2323 if (!warning_printed
)
2325 warning (_("Skipping obsolete .gdb_index section in %s."),
2327 warning_printed
= 1;
2331 /* Index version 4 uses a different hash function than index version
2334 Versions earlier than 6 did not emit psymbols for inlined
2335 functions. Using these files will cause GDB not to be able to
2336 set breakpoints on inlined functions by name, so we ignore these
2337 indices unless the --use-deprecated-index-sections command line
2338 option was supplied. */
2339 if (version
< 6 && !use_deprecated_index_sections
)
2341 static int warning_printed
= 0;
2342 if (!warning_printed
)
2344 warning (_("Skipping deprecated .gdb_index section in %s, pass "
2345 "--use-deprecated-index-sections to use them anyway"),
2347 warning_printed
= 1;
2351 /* Indexes with higher version than the one supported by GDB may be no
2352 longer backward compatible. */
2356 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2357 map
->version
= version
;
2358 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2360 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2363 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2364 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2368 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2369 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2370 - MAYBE_SWAP (metadata
[i
]))
2374 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2375 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2376 - MAYBE_SWAP (metadata
[i
]));
2379 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2380 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2381 - MAYBE_SWAP (metadata
[i
]))
2382 / (2 * sizeof (offset_type
)));
2385 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2387 /* Don't use the index if it's empty. */
2388 if (map
->symbol_table_slots
== 0)
2391 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2394 if (types_list_elements
)
2396 struct dwarf2_section_info
*section
;
2398 /* We can only handle a single .debug_types when we have an
2400 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2403 section
= VEC_index (dwarf2_section_info_def
,
2404 dwarf2_per_objfile
->types
, 0);
2406 if (!create_signatured_type_table_from_index (objfile
, section
,
2408 types_list_elements
))
2412 create_addrmap_from_index (objfile
, map
);
2414 dwarf2_per_objfile
->index_table
= map
;
2415 dwarf2_per_objfile
->using_index
= 1;
2416 dwarf2_per_objfile
->quick_file_names_table
=
2417 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2422 /* A helper for the "quick" functions which sets the global
2423 dwarf2_per_objfile according to OBJFILE. */
2426 dw2_setup (struct objfile
*objfile
)
2428 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2429 gdb_assert (dwarf2_per_objfile
);
2432 /* die_reader_func for dw2_get_file_names. */
2435 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2437 struct die_info
*comp_unit_die
,
2441 struct dwarf2_cu
*cu
= reader
->cu
;
2442 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2443 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2444 struct line_header
*lh
;
2445 struct attribute
*attr
;
2447 char *name
, *comp_dir
;
2449 struct quick_file_names
*qfn
;
2450 unsigned int line_offset
;
2452 /* Our callers never want to match partial units -- instead they
2453 will match the enclosing full CU. */
2454 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2456 this_cu
->v
.quick
->no_file_data
= 1;
2464 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2467 struct quick_file_names find_entry
;
2469 line_offset
= DW_UNSND (attr
);
2471 /* We may have already read in this line header (TU line header sharing).
2472 If we have we're done. */
2473 find_entry
.offset
= line_offset
;
2474 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2475 &find_entry
, INSERT
);
2478 this_cu
->v
.quick
->file_names
= *slot
;
2482 lh
= dwarf_decode_line_header (line_offset
, cu
);
2486 this_cu
->v
.quick
->no_file_data
= 1;
2490 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2491 qfn
->offset
= line_offset
;
2492 gdb_assert (slot
!= NULL
);
2495 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2497 qfn
->num_file_names
= lh
->num_file_names
;
2498 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2499 lh
->num_file_names
* sizeof (char *));
2500 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2501 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2502 qfn
->real_names
= NULL
;
2504 free_line_header (lh
);
2506 this_cu
->v
.quick
->file_names
= qfn
;
2509 /* A helper for the "quick" functions which attempts to read the line
2510 table for THIS_CU. */
2512 static struct quick_file_names
*
2513 dw2_get_file_names (struct objfile
*objfile
,
2514 struct dwarf2_per_cu_data
*this_cu
)
2516 if (this_cu
->v
.quick
->file_names
!= NULL
)
2517 return this_cu
->v
.quick
->file_names
;
2518 /* If we know there is no line data, no point in looking again. */
2519 if (this_cu
->v
.quick
->no_file_data
)
2522 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2523 in the stub for CUs, there's is no need to lookup the DWO file.
2524 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2526 if (this_cu
->is_debug_types
)
2527 init_cutu_and_read_dies (this_cu
, 0, 0, dw2_get_file_names_reader
, NULL
);
2529 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2531 if (this_cu
->v
.quick
->no_file_data
)
2533 return this_cu
->v
.quick
->file_names
;
2536 /* A helper for the "quick" functions which computes and caches the
2537 real path for a given file name from the line table. */
2540 dw2_get_real_path (struct objfile
*objfile
,
2541 struct quick_file_names
*qfn
, int index
)
2543 if (qfn
->real_names
== NULL
)
2544 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2545 qfn
->num_file_names
, sizeof (char *));
2547 if (qfn
->real_names
[index
] == NULL
)
2548 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2550 return qfn
->real_names
[index
];
2553 static struct symtab
*
2554 dw2_find_last_source_symtab (struct objfile
*objfile
)
2558 dw2_setup (objfile
);
2559 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2560 return dw2_instantiate_symtab (dw2_get_cu (index
));
2563 /* Traversal function for dw2_forget_cached_source_info. */
2566 dw2_free_cached_file_names (void **slot
, void *info
)
2568 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2570 if (file_data
->real_names
)
2574 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2576 xfree ((void*) file_data
->real_names
[i
]);
2577 file_data
->real_names
[i
] = NULL
;
2585 dw2_forget_cached_source_info (struct objfile
*objfile
)
2587 dw2_setup (objfile
);
2589 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2590 dw2_free_cached_file_names
, NULL
);
2593 /* Helper function for dw2_map_symtabs_matching_filename that expands
2594 the symtabs and calls the iterator. */
2597 dw2_map_expand_apply (struct objfile
*objfile
,
2598 struct dwarf2_per_cu_data
*per_cu
,
2600 const char *full_path
, const char *real_path
,
2601 int (*callback
) (struct symtab
*, void *),
2604 struct symtab
*last_made
= objfile
->symtabs
;
2606 /* Don't visit already-expanded CUs. */
2607 if (per_cu
->v
.quick
->symtab
)
2610 /* This may expand more than one symtab, and we want to iterate over
2612 dw2_instantiate_symtab (per_cu
);
2614 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2615 objfile
->symtabs
, last_made
);
2618 /* Implementation of the map_symtabs_matching_filename method. */
2621 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
2622 const char *full_path
, const char *real_path
,
2623 int (*callback
) (struct symtab
*, void *),
2627 const char *name_basename
= lbasename (name
);
2628 int name_len
= strlen (name
);
2629 int is_abs
= IS_ABSOLUTE_PATH (name
);
2631 dw2_setup (objfile
);
2633 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2634 + dwarf2_per_objfile
->n_type_units
); ++i
)
2637 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2638 struct quick_file_names
*file_data
;
2640 /* We only need to look at symtabs not already expanded. */
2641 if (per_cu
->v
.quick
->symtab
)
2644 file_data
= dw2_get_file_names (objfile
, per_cu
);
2645 if (file_data
== NULL
)
2648 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2650 const char *this_name
= file_data
->file_names
[j
];
2652 if (FILENAME_CMP (name
, this_name
) == 0
2653 || (!is_abs
&& compare_filenames_for_search (this_name
,
2656 if (dw2_map_expand_apply (objfile
, per_cu
,
2657 name
, full_path
, real_path
,
2662 /* Before we invoke realpath, which can get expensive when many
2663 files are involved, do a quick comparison of the basenames. */
2664 if (! basenames_may_differ
2665 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
2668 if (full_path
!= NULL
)
2670 const char *this_real_name
= dw2_get_real_path (objfile
,
2673 if (this_real_name
!= NULL
2674 && (FILENAME_CMP (full_path
, this_real_name
) == 0
2676 && compare_filenames_for_search (this_real_name
,
2679 if (dw2_map_expand_apply (objfile
, per_cu
,
2680 name
, full_path
, real_path
,
2686 if (real_path
!= NULL
)
2688 const char *this_real_name
= dw2_get_real_path (objfile
,
2691 if (this_real_name
!= NULL
2692 && (FILENAME_CMP (real_path
, this_real_name
) == 0
2694 && compare_filenames_for_search (this_real_name
,
2697 if (dw2_map_expand_apply (objfile
, per_cu
,
2698 name
, full_path
, real_path
,
2709 static struct symtab
*
2710 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2711 const char *name
, domain_enum domain
)
2713 /* We do all the work in the pre_expand_symtabs_matching hook
2718 /* A helper function that expands all symtabs that hold an object
2722 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2724 dw2_setup (objfile
);
2726 /* index_table is NULL if OBJF_READNOW. */
2727 if (dwarf2_per_objfile
->index_table
)
2731 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2734 offset_type i
, len
= MAYBE_SWAP (*vec
);
2735 for (i
= 0; i
< len
; ++i
)
2737 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2738 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2740 dw2_instantiate_symtab (per_cu
);
2747 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2748 enum block_enum block_kind
, const char *name
,
2751 dw2_do_expand_symtabs_matching (objfile
, name
);
2755 dw2_print_stats (struct objfile
*objfile
)
2759 dw2_setup (objfile
);
2761 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2762 + dwarf2_per_objfile
->n_type_units
); ++i
)
2764 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2766 if (!per_cu
->v
.quick
->symtab
)
2769 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2773 dw2_dump (struct objfile
*objfile
)
2775 /* Nothing worth printing. */
2779 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2780 struct section_offsets
*delta
)
2782 /* There's nothing to relocate here. */
2786 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2787 const char *func_name
)
2789 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2793 dw2_expand_all_symtabs (struct objfile
*objfile
)
2797 dw2_setup (objfile
);
2799 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2800 + dwarf2_per_objfile
->n_type_units
); ++i
)
2802 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2804 dw2_instantiate_symtab (per_cu
);
2809 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2810 const char *filename
)
2814 dw2_setup (objfile
);
2816 /* We don't need to consider type units here.
2817 This is only called for examining code, e.g. expand_line_sal.
2818 There can be an order of magnitude (or more) more type units
2819 than comp units, and we avoid them if we can. */
2821 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2824 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2825 struct quick_file_names
*file_data
;
2827 /* We only need to look at symtabs not already expanded. */
2828 if (per_cu
->v
.quick
->symtab
)
2831 file_data
= dw2_get_file_names (objfile
, per_cu
);
2832 if (file_data
== NULL
)
2835 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2837 const char *this_name
= file_data
->file_names
[j
];
2838 if (FILENAME_CMP (this_name
, filename
) == 0)
2840 dw2_instantiate_symtab (per_cu
);
2847 /* A helper function for dw2_find_symbol_file that finds the primary
2848 file name for a given CU. This is a die_reader_func. */
2851 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
2853 struct die_info
*comp_unit_die
,
2857 const char **result_ptr
= data
;
2858 struct dwarf2_cu
*cu
= reader
->cu
;
2859 struct attribute
*attr
;
2861 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
2865 *result_ptr
= DW_STRING (attr
);
2869 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2871 struct dwarf2_per_cu_data
*per_cu
;
2873 struct quick_file_names
*file_data
;
2874 const char *filename
;
2876 dw2_setup (objfile
);
2878 /* index_table is NULL if OBJF_READNOW. */
2879 if (!dwarf2_per_objfile
->index_table
)
2883 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
2885 struct blockvector
*bv
= BLOCKVECTOR (s
);
2886 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2887 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
2890 return sym
->symtab
->filename
;
2895 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2899 /* Note that this just looks at the very first one named NAME -- but
2900 actually we are looking for a function. find_main_filename
2901 should be rewritten so that it doesn't require a custom hook. It
2902 could just use the ordinary symbol tables. */
2903 /* vec[0] is the length, which must always be >0. */
2904 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2906 if (per_cu
->v
.quick
->symtab
!= NULL
)
2907 return per_cu
->v
.quick
->symtab
->filename
;
2909 init_cutu_and_read_dies (per_cu
, 0, 0, dw2_get_primary_filename_reader
,
2916 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2917 struct objfile
*objfile
, int global
,
2918 int (*callback
) (struct block
*,
2919 struct symbol
*, void *),
2920 void *data
, symbol_compare_ftype
*match
,
2921 symbol_compare_ftype
*ordered_compare
)
2923 /* Currently unimplemented; used for Ada. The function can be called if the
2924 current language is Ada for a non-Ada objfile using GNU index. As Ada
2925 does not look for non-Ada symbols this function should just return. */
2929 dw2_expand_symtabs_matching
2930 (struct objfile
*objfile
,
2931 int (*file_matcher
) (const char *, void *),
2932 int (*name_matcher
) (const char *, void *),
2933 enum search_domain kind
,
2938 struct mapped_index
*index
;
2940 dw2_setup (objfile
);
2942 /* index_table is NULL if OBJF_READNOW. */
2943 if (!dwarf2_per_objfile
->index_table
)
2945 index
= dwarf2_per_objfile
->index_table
;
2947 if (file_matcher
!= NULL
)
2949 struct cleanup
*cleanup
;
2950 htab_t visited_found
, visited_not_found
;
2952 visited_found
= htab_create_alloc (10,
2953 htab_hash_pointer
, htab_eq_pointer
,
2954 NULL
, xcalloc
, xfree
);
2955 cleanup
= make_cleanup_htab_delete (visited_found
);
2956 visited_not_found
= htab_create_alloc (10,
2957 htab_hash_pointer
, htab_eq_pointer
,
2958 NULL
, xcalloc
, xfree
);
2959 make_cleanup_htab_delete (visited_not_found
);
2961 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2962 + dwarf2_per_objfile
->n_type_units
); ++i
)
2965 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2966 struct quick_file_names
*file_data
;
2969 per_cu
->v
.quick
->mark
= 0;
2971 /* We only need to look at symtabs not already expanded. */
2972 if (per_cu
->v
.quick
->symtab
)
2975 file_data
= dw2_get_file_names (objfile
, per_cu
);
2976 if (file_data
== NULL
)
2979 if (htab_find (visited_not_found
, file_data
) != NULL
)
2981 else if (htab_find (visited_found
, file_data
) != NULL
)
2983 per_cu
->v
.quick
->mark
= 1;
2987 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2989 if (file_matcher (file_data
->file_names
[j
], data
))
2991 per_cu
->v
.quick
->mark
= 1;
2996 slot
= htab_find_slot (per_cu
->v
.quick
->mark
2998 : visited_not_found
,
3003 do_cleanups (cleanup
);
3006 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3008 offset_type idx
= 2 * iter
;
3010 offset_type
*vec
, vec_len
, vec_idx
;
3012 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3015 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3017 if (! (*name_matcher
) (name
, data
))
3020 /* The name was matched, now expand corresponding CUs that were
3022 vec
= (offset_type
*) (index
->constant_pool
3023 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3024 vec_len
= MAYBE_SWAP (vec
[0]);
3025 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3027 struct dwarf2_per_cu_data
*per_cu
;
3029 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
3030 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3031 dw2_instantiate_symtab (per_cu
);
3036 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3039 static struct symtab
*
3040 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3044 if (BLOCKVECTOR (symtab
) != NULL
3045 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3048 if (symtab
->includes
== NULL
)
3051 for (i
= 0; symtab
->includes
[i
]; ++i
)
3053 struct symtab
*s
= symtab
->includes
[i
];
3055 s
= recursively_find_pc_sect_symtab (s
, pc
);
3063 static struct symtab
*
3064 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3065 struct minimal_symbol
*msymbol
,
3067 struct obj_section
*section
,
3070 struct dwarf2_per_cu_data
*data
;
3071 struct symtab
*result
;
3073 dw2_setup (objfile
);
3075 if (!objfile
->psymtabs_addrmap
)
3078 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3082 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3083 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3084 paddress (get_objfile_arch (objfile
), pc
));
3086 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3087 gdb_assert (result
!= NULL
);
3092 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3093 void *data
, int need_fullname
)
3096 struct cleanup
*cleanup
;
3097 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3098 NULL
, xcalloc
, xfree
);
3100 cleanup
= make_cleanup_htab_delete (visited
);
3101 dw2_setup (objfile
);
3103 /* We can ignore file names coming from already-expanded CUs. */
3104 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3105 + dwarf2_per_objfile
->n_type_units
); ++i
)
3107 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3109 if (per_cu
->v
.quick
->symtab
)
3111 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3114 *slot
= per_cu
->v
.quick
->file_names
;
3118 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3119 + dwarf2_per_objfile
->n_type_units
); ++i
)
3122 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3123 struct quick_file_names
*file_data
;
3126 /* We only need to look at symtabs not already expanded. */
3127 if (per_cu
->v
.quick
->symtab
)
3130 file_data
= dw2_get_file_names (objfile
, per_cu
);
3131 if (file_data
== NULL
)
3134 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3137 /* Already visited. */
3142 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3144 const char *this_real_name
;
3147 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3149 this_real_name
= NULL
;
3150 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3154 do_cleanups (cleanup
);
3158 dw2_has_symbols (struct objfile
*objfile
)
3163 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3166 dw2_find_last_source_symtab
,
3167 dw2_forget_cached_source_info
,
3168 dw2_map_symtabs_matching_filename
,
3170 dw2_pre_expand_symtabs_matching
,
3174 dw2_expand_symtabs_for_function
,
3175 dw2_expand_all_symtabs
,
3176 dw2_expand_symtabs_with_filename
,
3177 dw2_find_symbol_file
,
3178 dw2_map_matching_symbols
,
3179 dw2_expand_symtabs_matching
,
3180 dw2_find_pc_sect_symtab
,
3181 dw2_map_symbol_filenames
3184 /* Initialize for reading DWARF for this objfile. Return 0 if this
3185 file will use psymtabs, or 1 if using the GNU index. */
3188 dwarf2_initialize_objfile (struct objfile
*objfile
)
3190 /* If we're about to read full symbols, don't bother with the
3191 indices. In this case we also don't care if some other debug
3192 format is making psymtabs, because they are all about to be
3194 if ((objfile
->flags
& OBJF_READNOW
))
3198 dwarf2_per_objfile
->using_index
= 1;
3199 create_all_comp_units (objfile
);
3200 create_all_type_units (objfile
);
3201 dwarf2_per_objfile
->quick_file_names_table
=
3202 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3204 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3205 + dwarf2_per_objfile
->n_type_units
); ++i
)
3207 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3209 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3210 struct dwarf2_per_cu_quick_data
);
3213 /* Return 1 so that gdb sees the "quick" functions. However,
3214 these functions will be no-ops because we will have expanded
3219 if (dwarf2_read_index (objfile
))
3227 /* Build a partial symbol table. */
3230 dwarf2_build_psymtabs (struct objfile
*objfile
)
3232 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3234 init_psymbol_list (objfile
, 1024);
3237 dwarf2_build_psymtabs_hard (objfile
);
3240 /* Return TRUE if OFFSET is within CU_HEADER. */
3243 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3245 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3246 sect_offset top
= { (cu_header
->offset
.sect_off
+ cu_header
->length
3247 + cu_header
->initial_length_size
) };
3249 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3252 /* Read in the comp unit header information from the debug_info at info_ptr.
3253 NOTE: This leaves members offset, first_die_offset to be filled in
3257 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3258 gdb_byte
*info_ptr
, bfd
*abfd
)
3261 unsigned int bytes_read
;
3263 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3264 cu_header
->initial_length_size
= bytes_read
;
3265 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3266 info_ptr
+= bytes_read
;
3267 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3269 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3271 info_ptr
+= bytes_read
;
3272 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3274 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3275 if (signed_addr
< 0)
3276 internal_error (__FILE__
, __LINE__
,
3277 _("read_comp_unit_head: dwarf from non elf file"));
3278 cu_header
->signed_addr_p
= signed_addr
;
3283 /* Subroutine of read_and_check_comp_unit_head and
3284 read_and_check_type_unit_head to simplify them.
3285 Perform various error checking on the header. */
3288 error_check_comp_unit_head (struct comp_unit_head
*header
,
3289 struct dwarf2_section_info
*section
)
3291 bfd
*abfd
= section
->asection
->owner
;
3292 const char *filename
= bfd_get_filename (abfd
);
3294 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3295 error (_("Dwarf Error: wrong version in compilation unit header "
3296 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3299 if (header
->abbrev_offset
.sect_off
3300 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
3301 &dwarf2_per_objfile
->abbrev
))
3302 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3303 "(offset 0x%lx + 6) [in module %s]"),
3304 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3307 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3308 avoid potential 32-bit overflow. */
3309 if (((unsigned long) header
->offset
.sect_off
3310 + header
->length
+ header
->initial_length_size
)
3312 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3313 "(offset 0x%lx + 0) [in module %s]"),
3314 (long) header
->length
, (long) header
->offset
.sect_off
,
3318 /* Read in a CU/TU header and perform some basic error checking.
3319 The contents of the header are stored in HEADER.
3320 The result is a pointer to the start of the first DIE. */
3323 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3324 struct dwarf2_section_info
*section
,
3326 int is_debug_types_section
)
3328 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3329 bfd
*abfd
= section
->asection
->owner
;
3331 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3333 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3335 /* If we're reading a type unit, skip over the signature and
3336 type_offset fields. */
3337 if (is_debug_types_section
)
3338 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3340 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3342 error_check_comp_unit_head (header
, section
);
3347 /* Read in the types comp unit header information from .debug_types entry at
3348 types_ptr. The result is a pointer to one past the end of the header. */
3351 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3352 struct dwarf2_section_info
*section
,
3354 ULONGEST
*signature
,
3355 cu_offset
*type_offset_in_tu
)
3357 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3358 bfd
*abfd
= section
->asection
->owner
;
3360 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3362 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3364 /* If we're reading a type unit, skip over the signature and
3365 type_offset fields. */
3366 if (signature
!= NULL
)
3367 *signature
= read_8_bytes (abfd
, info_ptr
);
3369 if (type_offset_in_tu
!= NULL
)
3370 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3371 header
->offset_size
);
3372 info_ptr
+= header
->offset_size
;
3374 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3376 error_check_comp_unit_head (header
, section
);
3381 /* Allocate a new partial symtab for file named NAME and mark this new
3382 partial symtab as being an include of PST. */
3385 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3386 struct objfile
*objfile
)
3388 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3390 subpst
->section_offsets
= pst
->section_offsets
;
3391 subpst
->textlow
= 0;
3392 subpst
->texthigh
= 0;
3394 subpst
->dependencies
= (struct partial_symtab
**)
3395 obstack_alloc (&objfile
->objfile_obstack
,
3396 sizeof (struct partial_symtab
*));
3397 subpst
->dependencies
[0] = pst
;
3398 subpst
->number_of_dependencies
= 1;
3400 subpst
->globals_offset
= 0;
3401 subpst
->n_global_syms
= 0;
3402 subpst
->statics_offset
= 0;
3403 subpst
->n_static_syms
= 0;
3404 subpst
->symtab
= NULL
;
3405 subpst
->read_symtab
= pst
->read_symtab
;
3408 /* No private part is necessary for include psymtabs. This property
3409 can be used to differentiate between such include psymtabs and
3410 the regular ones. */
3411 subpst
->read_symtab_private
= NULL
;
3414 /* Read the Line Number Program data and extract the list of files
3415 included by the source file represented by PST. Build an include
3416 partial symtab for each of these included files. */
3419 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3420 struct die_info
*die
,
3421 struct partial_symtab
*pst
)
3423 struct line_header
*lh
= NULL
;
3424 struct attribute
*attr
;
3426 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3428 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
3430 return; /* No linetable, so no includes. */
3432 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3433 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3435 free_line_header (lh
);
3439 hash_signatured_type (const void *item
)
3441 const struct signatured_type
*sig_type
= item
;
3443 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3444 return sig_type
->signature
;
3448 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
3450 const struct signatured_type
*lhs
= item_lhs
;
3451 const struct signatured_type
*rhs
= item_rhs
;
3453 return lhs
->signature
== rhs
->signature
;
3456 /* Allocate a hash table for signatured types. */
3459 allocate_signatured_type_table (struct objfile
*objfile
)
3461 return htab_create_alloc_ex (41,
3462 hash_signatured_type
,
3465 &objfile
->objfile_obstack
,
3466 hashtab_obstack_allocate
,
3467 dummy_obstack_deallocate
);
3470 /* A helper function to add a signatured type CU to a table. */
3473 add_signatured_type_cu_to_table (void **slot
, void *datum
)
3475 struct signatured_type
*sigt
= *slot
;
3476 struct dwarf2_per_cu_data
***datap
= datum
;
3478 **datap
= &sigt
->per_cu
;
3484 /* Create the hash table of all entries in the .debug_types section.
3485 DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
3486 The result is a pointer to the hash table or NULL if there are
3490 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
3491 VEC (dwarf2_section_info_def
) *types
)
3493 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3494 htab_t types_htab
= NULL
;
3496 struct dwarf2_section_info
*section
;
3498 if (VEC_empty (dwarf2_section_info_def
, types
))
3502 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
3506 gdb_byte
*info_ptr
, *end_ptr
;
3508 dwarf2_read_section (objfile
, section
);
3509 info_ptr
= section
->buffer
;
3511 if (info_ptr
== NULL
)
3514 /* We can't set abfd until now because the section may be empty or
3515 not present, in which case section->asection will be NULL. */
3516 abfd
= section
->asection
->owner
;
3518 if (types_htab
== NULL
)
3521 types_htab
= allocate_dwo_unit_table (objfile
);
3523 types_htab
= allocate_signatured_type_table (objfile
);
3526 if (dwarf2_die_debug
)
3527 fprintf_unfiltered (gdb_stdlog
, "Reading signatured types for %s:\n",
3528 bfd_get_filename (abfd
));
3530 /* We don't use init_cutu_and_read_dies_simple, or some such, here
3531 because we don't need to read any dies: the signature is in the
3534 end_ptr
= info_ptr
+ section
->size
;
3535 while (info_ptr
< end_ptr
)
3538 cu_offset type_offset_in_tu
;
3540 struct signatured_type
*sig_type
;
3541 struct dwo_unit
*dwo_tu
;
3543 gdb_byte
*ptr
= info_ptr
;
3544 struct comp_unit_head header
;
3545 unsigned int length
;
3547 offset
.sect_off
= ptr
- section
->buffer
;
3549 /* We need to read the type's signature in order to build the hash
3550 table, but we don't need anything else just yet. */
3552 ptr
= read_and_check_type_unit_head (&header
, section
, ptr
,
3553 &signature
, &type_offset_in_tu
);
3555 length
= header
.initial_length_size
+ header
.length
;
3557 /* Skip dummy type units. */
3558 if (ptr
>= info_ptr
+ length
3559 || peek_abbrev_code (abfd
, ptr
) == 0)
3561 info_ptr
+= header
.initial_length_size
+ header
.length
;
3568 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3570 dwo_tu
->dwo_file
= dwo_file
;
3571 dwo_tu
->signature
= signature
;
3572 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
3573 dwo_tu
->info_or_types_section
= section
;
3574 dwo_tu
->offset
= offset
;
3575 dwo_tu
->length
= length
;
3579 /* N.B.: type_offset is not usable if this type uses a DWO file.
3580 The real type_offset is in the DWO file. */
3582 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3583 struct signatured_type
);
3584 sig_type
->signature
= signature
;
3585 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3586 sig_type
->per_cu
.objfile
= objfile
;
3587 sig_type
->per_cu
.is_debug_types
= 1;
3588 sig_type
->per_cu
.info_or_types_section
= section
;
3589 sig_type
->per_cu
.offset
= offset
;
3590 sig_type
->per_cu
.length
= length
;
3593 slot
= htab_find_slot (types_htab
,
3594 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
3596 gdb_assert (slot
!= NULL
);
3599 sect_offset dup_offset
;
3603 const struct dwo_unit
*dup_tu
= *slot
;
3605 dup_offset
= dup_tu
->offset
;
3609 const struct signatured_type
*dup_tu
= *slot
;
3611 dup_offset
= dup_tu
->per_cu
.offset
;
3614 complaint (&symfile_complaints
,
3615 _("debug type entry at offset 0x%x is duplicate to the "
3616 "entry at offset 0x%x, signature 0x%s"),
3617 offset
.sect_off
, dup_offset
.sect_off
,
3618 phex (signature
, sizeof (signature
)));
3620 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
3622 if (dwarf2_die_debug
)
3623 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3625 phex (signature
, sizeof (signature
)));
3634 /* Create the hash table of all entries in the .debug_types section,
3635 and initialize all_type_units.
3636 The result is zero if there is an error (e.g. missing .debug_types section),
3637 otherwise non-zero. */
3640 create_all_type_units (struct objfile
*objfile
)
3643 struct dwarf2_per_cu_data
**iter
;
3645 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
3646 if (types_htab
== NULL
)
3648 dwarf2_per_objfile
->signatured_types
= NULL
;
3652 dwarf2_per_objfile
->signatured_types
= types_htab
;
3654 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
3655 dwarf2_per_objfile
->all_type_units
3656 = obstack_alloc (&objfile
->objfile_obstack
,
3657 dwarf2_per_objfile
->n_type_units
3658 * sizeof (struct dwarf2_per_cu_data
*));
3659 iter
= &dwarf2_per_objfile
->all_type_units
[0];
3660 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
3661 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
3662 == dwarf2_per_objfile
->n_type_units
);
3667 /* Lookup a signature based type for DW_FORM_ref_sig8.
3668 Returns NULL if signature SIG is not present in the table. */
3670 static struct signatured_type
*
3671 lookup_signatured_type (ULONGEST sig
)
3673 struct signatured_type find_entry
, *entry
;
3675 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3677 complaint (&symfile_complaints
,
3678 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
3682 find_entry
.signature
= sig
;
3683 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3687 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3690 init_cu_die_reader (struct die_reader_specs
*reader
,
3691 struct dwarf2_cu
*cu
,
3692 struct dwarf2_section_info
*section
,
3693 struct dwo_file
*dwo_file
)
3695 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
3696 reader
->abfd
= section
->asection
->owner
;
3698 reader
->dwo_file
= dwo_file
;
3699 reader
->die_section
= section
;
3700 reader
->buffer
= section
->buffer
;
3701 reader
->buffer_end
= section
->buffer
+ section
->size
;
3704 /* Find the base address of the compilation unit for range lists and
3705 location lists. It will normally be specified by DW_AT_low_pc.
3706 In DWARF-3 draft 4, the base address could be overridden by
3707 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3708 compilation units with discontinuous ranges. */
3711 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3713 struct attribute
*attr
;
3716 cu
->base_address
= 0;
3718 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3721 cu
->base_address
= DW_ADDR (attr
);
3726 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3729 cu
->base_address
= DW_ADDR (attr
);
3735 /* Initialize a CU (or TU) and read its DIEs.
3736 If the CU defers to a DWO file, read the DWO file as well.
3738 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
3739 Otherwise, a new CU is allocated with xmalloc.
3741 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
3742 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
3744 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
3745 linker) then DIE_READER_FUNC will not get called. */
3748 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
3749 int use_existing_cu
, int keep
,
3750 die_reader_func_ftype
*die_reader_func
,
3753 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3754 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
3755 bfd
*abfd
= section
->asection
->owner
;
3756 struct dwarf2_cu
*cu
;
3757 gdb_byte
*begin_info_ptr
, *info_ptr
;
3758 struct die_reader_specs reader
;
3759 struct die_info
*comp_unit_die
;
3761 struct attribute
*attr
;
3762 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
3763 struct signatured_type
*sig_type
= NULL
;
3765 if (use_existing_cu
)
3768 cleanups
= make_cleanup (null_cleanup
, NULL
);
3770 /* This is cheap if the section is already read in. */
3771 dwarf2_read_section (objfile
, section
);
3773 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
3775 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
3778 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
3782 /* If !use_existing_cu, this_cu->cu must be NULL. */
3783 gdb_assert (this_cu
->cu
== NULL
);
3785 cu
= xmalloc (sizeof (*cu
));
3786 init_one_comp_unit (cu
, this_cu
);
3788 /* If an error occurs while loading, release our storage. */
3789 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
3791 if (this_cu
->is_debug_types
)
3795 info_ptr
= read_and_check_type_unit_head (&cu
->header
,
3799 /* There's no way to get from PER_CU to its containing
3800 struct signatured_type.
3801 But we have the signature so we can use that. */
3802 sig_type
= lookup_signatured_type (signature
);
3803 /* We've already scanned all the signatured types,
3804 this must succeed. */
3805 gdb_assert (sig_type
!= NULL
);
3806 gdb_assert (&sig_type
->per_cu
== this_cu
);
3807 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3809 /* LENGTH has not been set yet for type units. */
3810 this_cu
->length
= cu
->header
.length
+ cu
->header
.initial_length_size
;
3812 /* Establish the type offset that can be used to lookup the type. */
3813 sig_type
->type_offset_in_section
.sect_off
=
3814 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
3818 info_ptr
= read_and_check_comp_unit_head (&cu
->header
,
3819 section
, info_ptr
, 0);
3821 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3822 gdb_assert (this_cu
->length
3823 == cu
->header
.length
+ cu
->header
.initial_length_size
);
3827 /* Skip dummy compilation units. */
3828 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
3829 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3831 do_cleanups (cleanups
);
3835 /* Read the abbrevs for this compilation unit into a table. */
3836 if (cu
->dwarf2_abbrevs
== NULL
)
3838 dwarf2_read_abbrevs (cu
, &dwarf2_per_objfile
->abbrev
);
3839 make_cleanup (dwarf2_free_abbrev_table
, cu
);
3842 /* Read the top level CU/TU die. */
3843 init_cu_die_reader (&reader
, cu
, section
, NULL
);
3844 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
3846 /* If we have a DWO stub, process it and then read in the DWO file.
3847 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
3848 a DWO CU, that this test will fail. */
3849 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
3852 char *dwo_name
= DW_STRING (attr
);
3853 const char *comp_dir
;
3854 struct dwo_unit
*dwo_unit
;
3855 ULONGEST signature
; /* Or dwo_id. */
3856 struct attribute
*stmt_list
, *low_pc
, *high_pc
, *ranges
;
3857 int i
,num_extra_attrs
;
3860 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
3861 " has children (offset 0x%x) [in module %s]"),
3862 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
3864 /* These attributes aren't processed until later:
3865 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
3866 However, the attribute is found in the stub which we won't have later.
3867 In order to not impose this complication on the rest of the code,
3868 we read them here and copy them to the DWO CU/TU die. */
3869 stmt_list
= low_pc
= high_pc
= ranges
= NULL
;
3871 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
3873 if (! this_cu
->is_debug_types
)
3874 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3875 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
3876 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
3877 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
3879 /* There should be a DW_AT_addr_base attribute here (if needed).
3880 We need the value before we can process DW_FORM_GNU_addr_index. */
3882 cu
->have_addr_base
= 0;
3883 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
3886 cu
->addr_base
= DW_UNSND (attr
);
3887 cu
->have_addr_base
= 1;
3890 if (this_cu
->is_debug_types
)
3892 gdb_assert (sig_type
!= NULL
);
3893 signature
= sig_type
->signature
;
3897 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
3899 error (_("Dwarf Error: missing dwo_id [in module %s]"),
3901 signature
= DW_UNSND (attr
);
3904 /* We may need the comp_dir in order to find the DWO file. */
3906 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
3908 comp_dir
= DW_STRING (attr
);
3910 if (this_cu
->is_debug_types
)
3911 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
3913 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
3916 if (dwo_unit
== NULL
)
3918 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
3919 " with ID %s [in module %s]"),
3920 this_cu
->offset
.sect_off
,
3921 phex (signature
, sizeof (signature
)),
3925 /* Set up for reading the DWO CU/TU. */
3926 cu
->dwo_unit
= dwo_unit
;
3927 section
= dwo_unit
->info_or_types_section
;
3928 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
3929 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
3931 if (this_cu
->is_debug_types
)
3935 info_ptr
= read_and_check_type_unit_head (&cu
->header
,
3938 gdb_assert (sig_type
->signature
== signature
);
3939 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3940 gdb_assert (dwo_unit
->length
3941 == cu
->header
.length
+ cu
->header
.initial_length_size
);
3943 /* Establish the type offset that can be used to lookup the type.
3944 For DWO files, we don't know it until now. */
3945 sig_type
->type_offset_in_section
.sect_off
=
3946 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
3950 info_ptr
= read_and_check_comp_unit_head (&cu
->header
,
3951 section
, info_ptr
, 0);
3952 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
3953 gdb_assert (dwo_unit
->length
3954 == cu
->header
.length
+ cu
->header
.initial_length_size
);
3957 /* Discard the original CU's abbrev table, and read the DWO's. */
3958 dwarf2_free_abbrev_table (cu
);
3959 dwarf2_read_abbrevs (cu
, &dwo_unit
->dwo_file
->sections
.abbrev
);
3961 /* Read in the die, but leave space to copy over the attributes
3962 from the stub. This has the benefit of simplifying the rest of
3963 the code - all the real work is done here. */
3964 num_extra_attrs
= ((stmt_list
!= NULL
)
3967 + (ranges
!= NULL
));
3968 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
3969 &has_children
, num_extra_attrs
);
3971 /* Copy over the attributes from the stub to the DWO die. */
3972 i
= comp_unit_die
->num_attrs
;
3973 if (stmt_list
!= NULL
)
3974 comp_unit_die
->attrs
[i
++] = *stmt_list
;
3976 comp_unit_die
->attrs
[i
++] = *low_pc
;
3977 if (high_pc
!= NULL
)
3978 comp_unit_die
->attrs
[i
++] = *high_pc
;
3980 comp_unit_die
->attrs
[i
++] = *ranges
;
3981 comp_unit_die
->num_attrs
+= num_extra_attrs
;
3983 /* Skip dummy compilation units. */
3984 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
3985 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3987 do_cleanups (cleanups
);
3992 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
3994 if (free_cu_cleanup
!= NULL
)
3998 /* We've successfully allocated this compilation unit. Let our
3999 caller clean it up when finished with it. */
4000 discard_cleanups (free_cu_cleanup
);
4002 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4003 So we have to manually free the abbrev table. */
4004 dwarf2_free_abbrev_table (cu
);
4006 /* Link this CU into read_in_chain. */
4007 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4008 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4011 do_cleanups (free_cu_cleanup
);
4014 do_cleanups (cleanups
);
4017 /* Read CU/TU THIS_CU in section SECTION,
4018 but do not follow DW_AT_GNU_dwo_name if present.
4019 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
4020 have already done the lookup to find the DWO file).
4022 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4023 THIS_CU->is_debug_types, but nothing else.
4025 We fill in THIS_CU->length.
4027 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4028 linker) then DIE_READER_FUNC will not get called.
4030 THIS_CU->cu is always freed when done.
4031 This is done in order to not leave THIS_CU->cu in a state where we have
4032 to care whether it refers to the "main" CU or the DWO CU. */
4035 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4036 struct dwarf2_section_info
*abbrev_section
,
4037 struct dwo_file
*dwo_file
,
4038 die_reader_func_ftype
*die_reader_func
,
4041 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4042 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4043 bfd
*abfd
= section
->asection
->owner
;
4044 struct dwarf2_cu cu
;
4045 gdb_byte
*begin_info_ptr
, *info_ptr
;
4046 struct die_reader_specs reader
;
4047 struct cleanup
*cleanups
;
4048 struct die_info
*comp_unit_die
;
4051 gdb_assert (this_cu
->cu
== NULL
);
4053 /* This is cheap if the section is already read in. */
4054 dwarf2_read_section (objfile
, section
);
4056 init_one_comp_unit (&cu
, this_cu
);
4058 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4060 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4061 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
, info_ptr
,
4062 this_cu
->is_debug_types
);
4064 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
4066 /* Skip dummy compilation units. */
4067 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4068 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4070 do_cleanups (cleanups
);
4074 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4075 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4077 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4078 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4080 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4082 do_cleanups (cleanups
);
4085 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4086 does not lookup the specified DWO file.
4087 This cannot be used to read DWO files.
4089 THIS_CU->cu is always freed when done.
4090 This is done in order to not leave THIS_CU->cu in a state where we have
4091 to care whether it refers to the "main" CU or the DWO CU.
4092 We can revisit this if the data shows there's a performance issue. */
4095 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4096 die_reader_func_ftype
*die_reader_func
,
4099 init_cutu_and_read_dies_no_follow (this_cu
,
4100 &dwarf2_per_objfile
->abbrev
,
4102 die_reader_func
, data
);
4105 /* die_reader_func for process_psymtab_comp_unit. */
4108 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4110 struct die_info
*comp_unit_die
,
4114 struct dwarf2_cu
*cu
= reader
->cu
;
4115 struct objfile
*objfile
= cu
->objfile
;
4116 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4117 struct attribute
*attr
;
4119 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4120 struct partial_symtab
*pst
;
4122 const char *filename
;
4123 int *want_partial_unit_ptr
= data
;
4125 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4126 && (want_partial_unit_ptr
== NULL
4127 || !*want_partial_unit_ptr
))
4130 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4132 cu
->list_in_scope
= &file_symbols
;
4134 /* Allocate a new partial symbol table structure. */
4135 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4136 if (attr
== NULL
|| !DW_STRING (attr
))
4139 filename
= DW_STRING (attr
);
4140 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4142 /* TEXTLOW and TEXTHIGH are set below. */
4144 objfile
->global_psymbols
.next
,
4145 objfile
->static_psymbols
.next
);
4146 pst
->psymtabs_addrmap_supported
= 1;
4148 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4150 pst
->dirname
= DW_STRING (attr
);
4152 pst
->read_symtab_private
= per_cu
;
4154 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4156 /* Store the function that reads in the rest of the symbol table. */
4157 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4159 per_cu
->v
.psymtab
= pst
;
4161 dwarf2_find_base_address (comp_unit_die
, cu
);
4163 /* Possibly set the default values of LOWPC and HIGHPC from
4165 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4166 &best_highpc
, cu
, pst
);
4167 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4168 /* Store the contiguous range if it is not empty; it can be empty for
4169 CUs with no code. */
4170 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4171 best_lowpc
+ baseaddr
,
4172 best_highpc
+ baseaddr
- 1, pst
);
4174 /* Check if comp unit has_children.
4175 If so, read the rest of the partial symbols from this comp unit.
4176 If not, there's no more debug_info for this comp unit. */
4179 struct partial_die_info
*first_die
;
4180 CORE_ADDR lowpc
, highpc
;
4182 lowpc
= ((CORE_ADDR
) -1);
4183 highpc
= ((CORE_ADDR
) 0);
4185 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4187 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4190 /* If we didn't find a lowpc, set it to highpc to avoid
4191 complaints from `maint check'. */
4192 if (lowpc
== ((CORE_ADDR
) -1))
4195 /* If the compilation unit didn't have an explicit address range,
4196 then use the information extracted from its child dies. */
4200 best_highpc
= highpc
;
4203 pst
->textlow
= best_lowpc
+ baseaddr
;
4204 pst
->texthigh
= best_highpc
+ baseaddr
;
4206 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4207 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4208 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4209 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4210 sort_pst_symbols (pst
);
4212 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
4215 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4216 struct dwarf2_per_cu_data
*iter
;
4218 /* Fill in 'dependencies' here; we fill in 'users' in a
4220 pst
->number_of_dependencies
= len
;
4221 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4222 len
* sizeof (struct symtab
*));
4224 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
4227 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4229 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
4232 if (per_cu
->is_debug_types
)
4234 /* It's not clear we want to do anything with stmt lists here.
4235 Waiting to see what gcc ultimately does. */
4239 /* Get the list of files included in the current compilation unit,
4240 and build a psymtab for each of them. */
4241 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4245 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4246 Process compilation unit THIS_CU for a psymtab. */
4249 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4250 int want_partial_unit
)
4252 /* If this compilation unit was already read in, free the
4253 cached copy in order to read it in again. This is
4254 necessary because we skipped some symbols when we first
4255 read in the compilation unit (see load_partial_dies).
4256 This problem could be avoided, but the benefit is unclear. */
4257 if (this_cu
->cu
!= NULL
)
4258 free_one_cached_comp_unit (this_cu
);
4260 gdb_assert (! this_cu
->is_debug_types
);
4261 init_cutu_and_read_dies (this_cu
, 0, 0, process_psymtab_comp_unit_reader
,
4262 &want_partial_unit
);
4264 /* Age out any secondary CUs. */
4265 age_cached_comp_units ();
4268 /* Traversal function for htab_traverse_noresize.
4269 Process one .debug_types comp-unit. */
4272 process_psymtab_type_unit (void **slot
, void *info
)
4274 struct signatured_type
*sig_type
= (struct signatured_type
*) *slot
;
4275 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
4277 gdb_assert (per_cu
->is_debug_types
);
4278 gdb_assert (info
== NULL
);
4280 /* If this compilation unit was already read in, free the
4281 cached copy in order to read it in again. This is
4282 necessary because we skipped some symbols when we first
4283 read in the compilation unit (see load_partial_dies).
4284 This problem could be avoided, but the benefit is unclear. */
4285 if (per_cu
->cu
!= NULL
)
4286 free_one_cached_comp_unit (per_cu
);
4288 init_cutu_and_read_dies (per_cu
, 0, 0, process_psymtab_comp_unit_reader
,
4291 /* Age out any secondary CUs. */
4292 age_cached_comp_units ();
4297 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4298 Build partial symbol tables for the .debug_types comp-units. */
4301 build_type_psymtabs (struct objfile
*objfile
)
4303 if (! create_all_type_units (objfile
))
4306 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
4307 process_psymtab_type_unit
, NULL
);
4310 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
4313 psymtabs_addrmap_cleanup (void *o
)
4315 struct objfile
*objfile
= o
;
4317 objfile
->psymtabs_addrmap
= NULL
;
4320 /* Compute the 'user' field for each psymtab in OBJFILE. */
4323 set_partial_user (struct objfile
*objfile
)
4327 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4329 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4330 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4333 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
4335 /* Set the 'user' field only if it is not already set. */
4336 if (pst
->dependencies
[j
]->user
== NULL
)
4337 pst
->dependencies
[j
]->user
= pst
;
4342 /* Build the partial symbol table by doing a quick pass through the
4343 .debug_info and .debug_abbrev sections. */
4346 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
4348 struct cleanup
*back_to
, *addrmap_cleanup
;
4349 struct obstack temp_obstack
;
4352 dwarf2_per_objfile
->reading_partial_symbols
= 1;
4354 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4356 /* Any cached compilation units will be linked by the per-objfile
4357 read_in_chain. Make sure to free them when we're done. */
4358 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
4360 build_type_psymtabs (objfile
);
4362 create_all_comp_units (objfile
);
4364 /* Create a temporary address map on a temporary obstack. We later
4365 copy this to the final obstack. */
4366 obstack_init (&temp_obstack
);
4367 make_cleanup_obstack_free (&temp_obstack
);
4368 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
4369 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
4371 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4373 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4375 process_psymtab_comp_unit (per_cu
, 0);
4378 set_partial_user (objfile
);
4380 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
4381 &objfile
->objfile_obstack
);
4382 discard_cleanups (addrmap_cleanup
);
4384 do_cleanups (back_to
);
4387 /* die_reader_func for load_partial_comp_unit. */
4390 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
4392 struct die_info
*comp_unit_die
,
4396 struct dwarf2_cu
*cu
= reader
->cu
;
4398 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4400 /* Check if comp unit has_children.
4401 If so, read the rest of the partial symbols from this comp unit.
4402 If not, there's no more debug_info for this comp unit. */
4404 load_partial_dies (reader
, info_ptr
, 0);
4407 /* Load the partial DIEs for a secondary CU into memory.
4408 This is also used when rereading a primary CU with load_all_dies. */
4411 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
4413 init_cutu_and_read_dies (this_cu
, 1, 1, load_partial_comp_unit_reader
, NULL
);
4416 /* Create a list of all compilation units in OBJFILE.
4417 This is only done for -readnow and building partial symtabs. */
4420 create_all_comp_units (struct objfile
*objfile
)
4424 struct dwarf2_per_cu_data
**all_comp_units
;
4427 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4428 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
4432 all_comp_units
= xmalloc (n_allocated
4433 * sizeof (struct dwarf2_per_cu_data
*));
4435 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
4436 + dwarf2_per_objfile
->info
.size
)
4438 unsigned int length
, initial_length_size
;
4439 struct dwarf2_per_cu_data
*this_cu
;
4442 offset
.sect_off
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
4444 /* Read just enough information to find out where the next
4445 compilation unit is. */
4446 length
= read_initial_length (objfile
->obfd
, info_ptr
,
4447 &initial_length_size
);
4449 /* Save the compilation unit for later lookup. */
4450 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
4451 sizeof (struct dwarf2_per_cu_data
));
4452 memset (this_cu
, 0, sizeof (*this_cu
));
4453 this_cu
->offset
= offset
;
4454 this_cu
->length
= length
+ initial_length_size
;
4455 this_cu
->objfile
= objfile
;
4456 this_cu
->info_or_types_section
= &dwarf2_per_objfile
->info
;
4458 if (n_comp_units
== n_allocated
)
4461 all_comp_units
= xrealloc (all_comp_units
,
4463 * sizeof (struct dwarf2_per_cu_data
*));
4465 all_comp_units
[n_comp_units
++] = this_cu
;
4467 info_ptr
= info_ptr
+ this_cu
->length
;
4470 dwarf2_per_objfile
->all_comp_units
4471 = obstack_alloc (&objfile
->objfile_obstack
,
4472 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
4473 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
4474 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
4475 xfree (all_comp_units
);
4476 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
4479 /* Process all loaded DIEs for compilation unit CU, starting at
4480 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
4481 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
4482 DW_AT_ranges). If NEED_PC is set, then this function will set
4483 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
4484 and record the covered ranges in the addrmap. */
4487 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
4488 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4490 struct partial_die_info
*pdi
;
4492 /* Now, march along the PDI's, descending into ones which have
4493 interesting children but skipping the children of the other ones,
4494 until we reach the end of the compilation unit. */
4500 fixup_partial_die (pdi
, cu
);
4502 /* Anonymous namespaces or modules have no name but have interesting
4503 children, so we need to look at them. Ditto for anonymous
4506 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
4507 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
4508 || pdi
->tag
== DW_TAG_imported_unit
)
4512 case DW_TAG_subprogram
:
4513 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4515 case DW_TAG_constant
:
4516 case DW_TAG_variable
:
4517 case DW_TAG_typedef
:
4518 case DW_TAG_union_type
:
4519 if (!pdi
->is_declaration
)
4521 add_partial_symbol (pdi
, cu
);
4524 case DW_TAG_class_type
:
4525 case DW_TAG_interface_type
:
4526 case DW_TAG_structure_type
:
4527 if (!pdi
->is_declaration
)
4529 add_partial_symbol (pdi
, cu
);
4532 case DW_TAG_enumeration_type
:
4533 if (!pdi
->is_declaration
)
4534 add_partial_enumeration (pdi
, cu
);
4536 case DW_TAG_base_type
:
4537 case DW_TAG_subrange_type
:
4538 /* File scope base type definitions are added to the partial
4540 add_partial_symbol (pdi
, cu
);
4542 case DW_TAG_namespace
:
4543 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
4546 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
4548 case DW_TAG_imported_unit
:
4550 struct dwarf2_per_cu_data
*per_cu
;
4552 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
4555 /* Go read the partial unit, if needed. */
4556 if (per_cu
->v
.psymtab
== NULL
)
4557 process_psymtab_comp_unit (per_cu
, 1);
4559 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
4568 /* If the die has a sibling, skip to the sibling. */
4570 pdi
= pdi
->die_sibling
;
4574 /* Functions used to compute the fully scoped name of a partial DIE.
4576 Normally, this is simple. For C++, the parent DIE's fully scoped
4577 name is concatenated with "::" and the partial DIE's name. For
4578 Java, the same thing occurs except that "." is used instead of "::".
4579 Enumerators are an exception; they use the scope of their parent
4580 enumeration type, i.e. the name of the enumeration type is not
4581 prepended to the enumerator.
4583 There are two complexities. One is DW_AT_specification; in this
4584 case "parent" means the parent of the target of the specification,
4585 instead of the direct parent of the DIE. The other is compilers
4586 which do not emit DW_TAG_namespace; in this case we try to guess
4587 the fully qualified name of structure types from their members'
4588 linkage names. This must be done using the DIE's children rather
4589 than the children of any DW_AT_specification target. We only need
4590 to do this for structures at the top level, i.e. if the target of
4591 any DW_AT_specification (if any; otherwise the DIE itself) does not
4594 /* Compute the scope prefix associated with PDI's parent, in
4595 compilation unit CU. The result will be allocated on CU's
4596 comp_unit_obstack, or a copy of the already allocated PDI->NAME
4597 field. NULL is returned if no prefix is necessary. */
4599 partial_die_parent_scope (struct partial_die_info
*pdi
,
4600 struct dwarf2_cu
*cu
)
4602 char *grandparent_scope
;
4603 struct partial_die_info
*parent
, *real_pdi
;
4605 /* We need to look at our parent DIE; if we have a DW_AT_specification,
4606 then this means the parent of the specification DIE. */
4609 while (real_pdi
->has_specification
)
4610 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
4612 parent
= real_pdi
->die_parent
;
4616 if (parent
->scope_set
)
4617 return parent
->scope
;
4619 fixup_partial_die (parent
, cu
);
4621 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
4623 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
4624 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
4625 Work around this problem here. */
4626 if (cu
->language
== language_cplus
4627 && parent
->tag
== DW_TAG_namespace
4628 && strcmp (parent
->name
, "::") == 0
4629 && grandparent_scope
== NULL
)
4631 parent
->scope
= NULL
;
4632 parent
->scope_set
= 1;
4636 if (pdi
->tag
== DW_TAG_enumerator
)
4637 /* Enumerators should not get the name of the enumeration as a prefix. */
4638 parent
->scope
= grandparent_scope
;
4639 else if (parent
->tag
== DW_TAG_namespace
4640 || parent
->tag
== DW_TAG_module
4641 || parent
->tag
== DW_TAG_structure_type
4642 || parent
->tag
== DW_TAG_class_type
4643 || parent
->tag
== DW_TAG_interface_type
4644 || parent
->tag
== DW_TAG_union_type
4645 || parent
->tag
== DW_TAG_enumeration_type
)
4647 if (grandparent_scope
== NULL
)
4648 parent
->scope
= parent
->name
;
4650 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
4652 parent
->name
, 0, cu
);
4656 /* FIXME drow/2004-04-01: What should we be doing with
4657 function-local names? For partial symbols, we should probably be
4659 complaint (&symfile_complaints
,
4660 _("unhandled containing DIE tag %d for DIE at %d"),
4661 parent
->tag
, pdi
->offset
.sect_off
);
4662 parent
->scope
= grandparent_scope
;
4665 parent
->scope_set
= 1;
4666 return parent
->scope
;
4669 /* Return the fully scoped name associated with PDI, from compilation unit
4670 CU. The result will be allocated with malloc. */
4673 partial_die_full_name (struct partial_die_info
*pdi
,
4674 struct dwarf2_cu
*cu
)
4678 /* If this is a template instantiation, we can not work out the
4679 template arguments from partial DIEs. So, unfortunately, we have
4680 to go through the full DIEs. At least any work we do building
4681 types here will be reused if full symbols are loaded later. */
4682 if (pdi
->has_template_arguments
)
4684 fixup_partial_die (pdi
, cu
);
4686 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
4688 struct die_info
*die
;
4689 struct attribute attr
;
4690 struct dwarf2_cu
*ref_cu
= cu
;
4692 /* DW_FORM_ref_addr is using section offset. */
4694 attr
.form
= DW_FORM_ref_addr
;
4695 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
4696 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
4698 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
4702 parent_scope
= partial_die_parent_scope (pdi
, cu
);
4703 if (parent_scope
== NULL
)
4706 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
4710 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
4712 struct objfile
*objfile
= cu
->objfile
;
4714 char *actual_name
= NULL
;
4716 int built_actual_name
= 0;
4718 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4720 actual_name
= partial_die_full_name (pdi
, cu
);
4722 built_actual_name
= 1;
4724 if (actual_name
== NULL
)
4725 actual_name
= pdi
->name
;
4729 case DW_TAG_subprogram
:
4730 if (pdi
->is_external
|| cu
->language
== language_ada
)
4732 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
4733 of the global scope. But in Ada, we want to be able to access
4734 nested procedures globally. So all Ada subprograms are stored
4735 in the global scope. */
4736 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4737 mst_text, objfile); */
4738 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4740 VAR_DOMAIN
, LOC_BLOCK
,
4741 &objfile
->global_psymbols
,
4742 0, pdi
->lowpc
+ baseaddr
,
4743 cu
->language
, objfile
);
4747 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4748 mst_file_text, objfile); */
4749 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4751 VAR_DOMAIN
, LOC_BLOCK
,
4752 &objfile
->static_psymbols
,
4753 0, pdi
->lowpc
+ baseaddr
,
4754 cu
->language
, objfile
);
4757 case DW_TAG_constant
:
4759 struct psymbol_allocation_list
*list
;
4761 if (pdi
->is_external
)
4762 list
= &objfile
->global_psymbols
;
4764 list
= &objfile
->static_psymbols
;
4765 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4766 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
4767 list
, 0, 0, cu
->language
, objfile
);
4770 case DW_TAG_variable
:
4772 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
4776 && !dwarf2_per_objfile
->has_section_at_zero
)
4778 /* A global or static variable may also have been stripped
4779 out by the linker if unused, in which case its address
4780 will be nullified; do not add such variables into partial
4781 symbol table then. */
4783 else if (pdi
->is_external
)
4786 Don't enter into the minimal symbol tables as there is
4787 a minimal symbol table entry from the ELF symbols already.
4788 Enter into partial symbol table if it has a location
4789 descriptor or a type.
4790 If the location descriptor is missing, new_symbol will create
4791 a LOC_UNRESOLVED symbol, the address of the variable will then
4792 be determined from the minimal symbol table whenever the variable
4794 The address for the partial symbol table entry is not
4795 used by GDB, but it comes in handy for debugging partial symbol
4798 if (pdi
->d
.locdesc
|| pdi
->has_type
)
4799 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4801 VAR_DOMAIN
, LOC_STATIC
,
4802 &objfile
->global_psymbols
,
4804 cu
->language
, objfile
);
4808 /* Static Variable. Skip symbols without location descriptors. */
4809 if (pdi
->d
.locdesc
== NULL
)
4811 if (built_actual_name
)
4812 xfree (actual_name
);
4815 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
4816 mst_file_data, objfile); */
4817 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4819 VAR_DOMAIN
, LOC_STATIC
,
4820 &objfile
->static_psymbols
,
4822 cu
->language
, objfile
);
4825 case DW_TAG_typedef
:
4826 case DW_TAG_base_type
:
4827 case DW_TAG_subrange_type
:
4828 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4830 VAR_DOMAIN
, LOC_TYPEDEF
,
4831 &objfile
->static_psymbols
,
4832 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4834 case DW_TAG_namespace
:
4835 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4837 VAR_DOMAIN
, LOC_TYPEDEF
,
4838 &objfile
->global_psymbols
,
4839 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4841 case DW_TAG_class_type
:
4842 case DW_TAG_interface_type
:
4843 case DW_TAG_structure_type
:
4844 case DW_TAG_union_type
:
4845 case DW_TAG_enumeration_type
:
4846 /* Skip external references. The DWARF standard says in the section
4847 about "Structure, Union, and Class Type Entries": "An incomplete
4848 structure, union or class type is represented by a structure,
4849 union or class entry that does not have a byte size attribute
4850 and that has a DW_AT_declaration attribute." */
4851 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
4853 if (built_actual_name
)
4854 xfree (actual_name
);
4858 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
4859 static vs. global. */
4860 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4862 STRUCT_DOMAIN
, LOC_TYPEDEF
,
4863 (cu
->language
== language_cplus
4864 || cu
->language
== language_java
)
4865 ? &objfile
->global_psymbols
4866 : &objfile
->static_psymbols
,
4867 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4870 case DW_TAG_enumerator
:
4871 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4873 VAR_DOMAIN
, LOC_CONST
,
4874 (cu
->language
== language_cplus
4875 || cu
->language
== language_java
)
4876 ? &objfile
->global_psymbols
4877 : &objfile
->static_psymbols
,
4878 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4884 if (built_actual_name
)
4885 xfree (actual_name
);
4888 /* Read a partial die corresponding to a namespace; also, add a symbol
4889 corresponding to that namespace to the symbol table. NAMESPACE is
4890 the name of the enclosing namespace. */
4893 add_partial_namespace (struct partial_die_info
*pdi
,
4894 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4895 int need_pc
, struct dwarf2_cu
*cu
)
4897 /* Add a symbol for the namespace. */
4899 add_partial_symbol (pdi
, cu
);
4901 /* Now scan partial symbols in that namespace. */
4903 if (pdi
->has_children
)
4904 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4907 /* Read a partial die corresponding to a Fortran module. */
4910 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
4911 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4913 /* Now scan partial symbols in that module. */
4915 if (pdi
->has_children
)
4916 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4919 /* Read a partial die corresponding to a subprogram and create a partial
4920 symbol for that subprogram. When the CU language allows it, this
4921 routine also defines a partial symbol for each nested subprogram
4922 that this subprogram contains.
4924 DIE my also be a lexical block, in which case we simply search
4925 recursively for suprograms defined inside that lexical block.
4926 Again, this is only performed when the CU language allows this
4927 type of definitions. */
4930 add_partial_subprogram (struct partial_die_info
*pdi
,
4931 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4932 int need_pc
, struct dwarf2_cu
*cu
)
4934 if (pdi
->tag
== DW_TAG_subprogram
)
4936 if (pdi
->has_pc_info
)
4938 if (pdi
->lowpc
< *lowpc
)
4939 *lowpc
= pdi
->lowpc
;
4940 if (pdi
->highpc
> *highpc
)
4941 *highpc
= pdi
->highpc
;
4945 struct objfile
*objfile
= cu
->objfile
;
4947 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4948 SECT_OFF_TEXT (objfile
));
4949 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4950 pdi
->lowpc
+ baseaddr
,
4951 pdi
->highpc
- 1 + baseaddr
,
4952 cu
->per_cu
->v
.psymtab
);
4956 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
4958 if (!pdi
->is_declaration
)
4959 /* Ignore subprogram DIEs that do not have a name, they are
4960 illegal. Do not emit a complaint at this point, we will
4961 do so when we convert this psymtab into a symtab. */
4963 add_partial_symbol (pdi
, cu
);
4967 if (! pdi
->has_children
)
4970 if (cu
->language
== language_ada
)
4972 pdi
= pdi
->die_child
;
4975 fixup_partial_die (pdi
, cu
);
4976 if (pdi
->tag
== DW_TAG_subprogram
4977 || pdi
->tag
== DW_TAG_lexical_block
)
4978 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4979 pdi
= pdi
->die_sibling
;
4984 /* Read a partial die corresponding to an enumeration type. */
4987 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4988 struct dwarf2_cu
*cu
)
4990 struct partial_die_info
*pdi
;
4992 if (enum_pdi
->name
!= NULL
)
4993 add_partial_symbol (enum_pdi
, cu
);
4995 pdi
= enum_pdi
->die_child
;
4998 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4999 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5001 add_partial_symbol (pdi
, cu
);
5002 pdi
= pdi
->die_sibling
;
5006 /* Return the initial uleb128 in the die at INFO_PTR. */
5009 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
5011 unsigned int bytes_read
;
5013 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5016 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
5017 Return the corresponding abbrev, or NULL if the number is zero (indicating
5018 an empty DIE). In either case *BYTES_READ will be set to the length of
5019 the initial number. */
5021 static struct abbrev_info
*
5022 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
5023 struct dwarf2_cu
*cu
)
5025 bfd
*abfd
= cu
->objfile
->obfd
;
5026 unsigned int abbrev_number
;
5027 struct abbrev_info
*abbrev
;
5029 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
5031 if (abbrev_number
== 0)
5034 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5037 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
5038 abbrev_number
, bfd_get_filename (abfd
));
5044 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5045 Returns a pointer to the end of a series of DIEs, terminated by an empty
5046 DIE. Any children of the skipped DIEs will also be skipped. */
5049 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
5051 struct dwarf2_cu
*cu
= reader
->cu
;
5052 struct abbrev_info
*abbrev
;
5053 unsigned int bytes_read
;
5057 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5059 return info_ptr
+ bytes_read
;
5061 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
5065 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
5066 INFO_PTR should point just after the initial uleb128 of a DIE, and the
5067 abbrev corresponding to that skipped uleb128 should be passed in
5068 ABBREV. Returns a pointer to this DIE's sibling, skipping any
5072 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
5073 struct abbrev_info
*abbrev
)
5075 unsigned int bytes_read
;
5076 struct attribute attr
;
5077 bfd
*abfd
= reader
->abfd
;
5078 struct dwarf2_cu
*cu
= reader
->cu
;
5079 gdb_byte
*buffer
= reader
->buffer
;
5080 const gdb_byte
*buffer_end
= reader
->buffer_end
;
5081 gdb_byte
*start_info_ptr
= info_ptr
;
5082 unsigned int form
, i
;
5084 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
5086 /* The only abbrev we care about is DW_AT_sibling. */
5087 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
5089 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
5090 if (attr
.form
== DW_FORM_ref_addr
)
5091 complaint (&symfile_complaints
,
5092 _("ignoring absolute DW_AT_sibling"));
5094 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
5097 /* If it isn't DW_AT_sibling, skip this attribute. */
5098 form
= abbrev
->attrs
[i
].form
;
5102 case DW_FORM_ref_addr
:
5103 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
5104 and later it is offset sized. */
5105 if (cu
->header
.version
== 2)
5106 info_ptr
+= cu
->header
.addr_size
;
5108 info_ptr
+= cu
->header
.offset_size
;
5111 info_ptr
+= cu
->header
.addr_size
;
5118 case DW_FORM_flag_present
:
5130 case DW_FORM_ref_sig8
:
5133 case DW_FORM_string
:
5134 read_direct_string (abfd
, info_ptr
, &bytes_read
);
5135 info_ptr
+= bytes_read
;
5137 case DW_FORM_sec_offset
:
5139 info_ptr
+= cu
->header
.offset_size
;
5141 case DW_FORM_exprloc
:
5143 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5144 info_ptr
+= bytes_read
;
5146 case DW_FORM_block1
:
5147 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
5149 case DW_FORM_block2
:
5150 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
5152 case DW_FORM_block4
:
5153 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
5157 case DW_FORM_ref_udata
:
5158 case DW_FORM_GNU_addr_index
:
5159 case DW_FORM_GNU_str_index
:
5160 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
5162 case DW_FORM_indirect
:
5163 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5164 info_ptr
+= bytes_read
;
5165 /* We need to continue parsing from here, so just go back to
5167 goto skip_attribute
;
5170 error (_("Dwarf Error: Cannot handle %s "
5171 "in DWARF reader [in module %s]"),
5172 dwarf_form_name (form
),
5173 bfd_get_filename (abfd
));
5177 if (abbrev
->has_children
)
5178 return skip_children (reader
, info_ptr
);
5183 /* Locate ORIG_PDI's sibling.
5184 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
5187 locate_pdi_sibling (const struct die_reader_specs
*reader
,
5188 struct partial_die_info
*orig_pdi
,
5191 /* Do we know the sibling already? */
5193 if (orig_pdi
->sibling
)
5194 return orig_pdi
->sibling
;
5196 /* Are there any children to deal with? */
5198 if (!orig_pdi
->has_children
)
5201 /* Skip the children the long way. */
5203 return skip_children (reader
, info_ptr
);
5206 /* Expand this partial symbol table into a full symbol table. */
5209 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
5215 warning (_("bug: psymtab for %s is already read in."),
5222 printf_filtered (_("Reading in symbols for %s..."),
5224 gdb_flush (gdb_stdout
);
5227 /* Restore our global data. */
5228 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
5229 dwarf2_objfile_data_key
);
5231 /* If this psymtab is constructed from a debug-only objfile, the
5232 has_section_at_zero flag will not necessarily be correct. We
5233 can get the correct value for this flag by looking at the data
5234 associated with the (presumably stripped) associated objfile. */
5235 if (pst
->objfile
->separate_debug_objfile_backlink
)
5237 struct dwarf2_per_objfile
*dpo_backlink
5238 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
5239 dwarf2_objfile_data_key
);
5241 dwarf2_per_objfile
->has_section_at_zero
5242 = dpo_backlink
->has_section_at_zero
;
5245 dwarf2_per_objfile
->reading_partial_symbols
= 0;
5247 psymtab_to_symtab_1 (pst
);
5249 /* Finish up the debug error message. */
5251 printf_filtered (_("done.\n"));
5255 process_cu_includes ();
5258 /* Reading in full CUs. */
5260 /* Add PER_CU to the queue. */
5263 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
5264 enum language pretend_language
)
5266 struct dwarf2_queue_item
*item
;
5269 item
= xmalloc (sizeof (*item
));
5270 item
->per_cu
= per_cu
;
5271 item
->pretend_language
= pretend_language
;
5274 if (dwarf2_queue
== NULL
)
5275 dwarf2_queue
= item
;
5277 dwarf2_queue_tail
->next
= item
;
5279 dwarf2_queue_tail
= item
;
5282 /* Process the queue. */
5285 process_queue (void)
5287 struct dwarf2_queue_item
*item
, *next_item
;
5289 /* The queue starts out with one item, but following a DIE reference
5290 may load a new CU, adding it to the end of the queue. */
5291 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
5293 if (dwarf2_per_objfile
->using_index
5294 ? !item
->per_cu
->v
.quick
->symtab
5295 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
5296 process_full_comp_unit (item
->per_cu
, item
->pretend_language
);
5298 item
->per_cu
->queued
= 0;
5299 next_item
= item
->next
;
5303 dwarf2_queue_tail
= NULL
;
5306 /* Free all allocated queue entries. This function only releases anything if
5307 an error was thrown; if the queue was processed then it would have been
5308 freed as we went along. */
5311 dwarf2_release_queue (void *dummy
)
5313 struct dwarf2_queue_item
*item
, *last
;
5315 item
= dwarf2_queue
;
5318 /* Anything still marked queued is likely to be in an
5319 inconsistent state, so discard it. */
5320 if (item
->per_cu
->queued
)
5322 if (item
->per_cu
->cu
!= NULL
)
5323 free_one_cached_comp_unit (item
->per_cu
);
5324 item
->per_cu
->queued
= 0;
5332 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
5335 /* Read in full symbols for PST, and anything it depends on. */
5338 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
5340 struct dwarf2_per_cu_data
*per_cu
;
5346 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
5347 if (!pst
->dependencies
[i
]->readin
5348 && pst
->dependencies
[i
]->user
== NULL
)
5350 /* Inform about additional files that need to be read in. */
5353 /* FIXME: i18n: Need to make this a single string. */
5354 fputs_filtered (" ", gdb_stdout
);
5356 fputs_filtered ("and ", gdb_stdout
);
5358 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
5359 wrap_here (""); /* Flush output. */
5360 gdb_flush (gdb_stdout
);
5362 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
5365 per_cu
= pst
->read_symtab_private
;
5369 /* It's an include file, no symbols to read for it.
5370 Everything is in the parent symtab. */
5375 dw2_do_instantiate_symtab (per_cu
);
5378 /* Trivial hash function for die_info: the hash value of a DIE
5379 is its offset in .debug_info for this objfile. */
5382 die_hash (const void *item
)
5384 const struct die_info
*die
= item
;
5386 return die
->offset
.sect_off
;
5389 /* Trivial comparison function for die_info structures: two DIEs
5390 are equal if they have the same offset. */
5393 die_eq (const void *item_lhs
, const void *item_rhs
)
5395 const struct die_info
*die_lhs
= item_lhs
;
5396 const struct die_info
*die_rhs
= item_rhs
;
5398 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
5401 /* die_reader_func for load_full_comp_unit.
5402 This is identical to read_signatured_type_reader,
5403 but is kept separate for now. */
5406 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
5408 struct die_info
*comp_unit_die
,
5412 struct dwarf2_cu
*cu
= reader
->cu
;
5413 enum language
*language_ptr
= data
;
5415 gdb_assert (cu
->die_hash
== NULL
);
5417 htab_create_alloc_ex (cu
->header
.length
/ 12,
5421 &cu
->comp_unit_obstack
,
5422 hashtab_obstack_allocate
,
5423 dummy_obstack_deallocate
);
5426 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
5427 &info_ptr
, comp_unit_die
);
5428 cu
->dies
= comp_unit_die
;
5429 /* comp_unit_die is not stored in die_hash, no need. */
5431 /* We try not to read any attributes in this function, because not
5432 all CUs needed for references have been loaded yet, and symbol
5433 table processing isn't initialized. But we have to set the CU language,
5434 or we won't be able to build types correctly.
5435 Similarly, if we do not read the producer, we can not apply
5436 producer-specific interpretation. */
5437 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
5440 /* Load the DIEs associated with PER_CU into memory. */
5443 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
5444 enum language pretend_language
)
5446 gdb_assert (! this_cu
->is_debug_types
);
5448 init_cutu_and_read_dies (this_cu
, 1, 1, load_full_comp_unit_reader
,
5452 /* Add a DIE to the delayed physname list. */
5455 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
5456 const char *name
, struct die_info
*die
,
5457 struct dwarf2_cu
*cu
)
5459 struct delayed_method_info mi
;
5461 mi
.fnfield_index
= fnfield_index
;
5465 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
5468 /* A cleanup for freeing the delayed method list. */
5471 free_delayed_list (void *ptr
)
5473 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
5474 if (cu
->method_list
!= NULL
)
5476 VEC_free (delayed_method_info
, cu
->method_list
);
5477 cu
->method_list
= NULL
;
5481 /* Compute the physnames of any methods on the CU's method list.
5483 The computation of method physnames is delayed in order to avoid the
5484 (bad) condition that one of the method's formal parameters is of an as yet
5488 compute_delayed_physnames (struct dwarf2_cu
*cu
)
5491 struct delayed_method_info
*mi
;
5492 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
5494 const char *physname
;
5495 struct fn_fieldlist
*fn_flp
5496 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
5497 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
5498 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
5502 /* Go objects should be embedded in a DW_TAG_module DIE,
5503 and it's not clear if/how imported objects will appear.
5504 To keep Go support simple until that's worked out,
5505 go back through what we've read and create something usable.
5506 We could do this while processing each DIE, and feels kinda cleaner,
5507 but that way is more invasive.
5508 This is to, for example, allow the user to type "p var" or "b main"
5509 without having to specify the package name, and allow lookups
5510 of module.object to work in contexts that use the expression
5514 fixup_go_packaging (struct dwarf2_cu
*cu
)
5516 char *package_name
= NULL
;
5517 struct pending
*list
;
5520 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
5522 for (i
= 0; i
< list
->nsyms
; ++i
)
5524 struct symbol
*sym
= list
->symbol
[i
];
5526 if (SYMBOL_LANGUAGE (sym
) == language_go
5527 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
5529 char *this_package_name
= go_symbol_package_name (sym
);
5531 if (this_package_name
== NULL
)
5533 if (package_name
== NULL
)
5534 package_name
= this_package_name
;
5537 if (strcmp (package_name
, this_package_name
) != 0)
5538 complaint (&symfile_complaints
,
5539 _("Symtab %s has objects from two different Go packages: %s and %s"),
5540 (sym
->symtab
&& sym
->symtab
->filename
5541 ? sym
->symtab
->filename
5542 : cu
->objfile
->name
),
5543 this_package_name
, package_name
);
5544 xfree (this_package_name
);
5550 if (package_name
!= NULL
)
5552 struct objfile
*objfile
= cu
->objfile
;
5553 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
5554 package_name
, objfile
);
5557 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5559 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5560 SYMBOL_SET_LANGUAGE (sym
, language_go
);
5561 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
5562 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
5563 e.g., "main" finds the "main" module and not C's main(). */
5564 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
5565 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
5566 SYMBOL_TYPE (sym
) = type
;
5568 add_symbol_to_list (sym
, &global_symbols
);
5570 xfree (package_name
);
5574 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
5576 /* Return the symtab for PER_CU. This works properly regardless of
5577 whether we're using the index or psymtabs. */
5579 static struct symtab
*
5580 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
5582 return (dwarf2_per_objfile
->using_index
5583 ? per_cu
->v
.quick
->symtab
5584 : per_cu
->v
.psymtab
->symtab
);
5587 /* A helper function for computing the list of all symbol tables
5588 included by PER_CU. */
5591 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
5592 htab_t all_children
,
5593 struct dwarf2_per_cu_data
*per_cu
)
5597 struct dwarf2_per_cu_data
*iter
;
5599 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
5602 /* This inclusion and its children have been processed. */
5607 /* Only add a CU if it has a symbol table. */
5608 if (get_symtab (per_cu
) != NULL
)
5609 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
5612 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
5614 recursively_compute_inclusions (result
, all_children
, iter
);
5617 /* Compute the symtab 'includes' fields for the symtab related to
5621 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
5623 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
5626 struct dwarf2_per_cu_data
*iter
;
5627 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
5628 htab_t all_children
;
5629 struct symtab
*symtab
= get_symtab (per_cu
);
5631 /* If we don't have a symtab, we can just skip this case. */
5635 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
5636 NULL
, xcalloc
, xfree
);
5639 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
5642 recursively_compute_inclusions (&result_children
, all_children
, iter
);
5644 /* Now we have a transitive closure of all the included CUs, so
5645 we can convert it to a list of symtabs. */
5646 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
5648 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
5649 (len
+ 1) * sizeof (struct symtab
*));
5651 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
5653 symtab
->includes
[ix
] = get_symtab (iter
);
5654 symtab
->includes
[len
] = NULL
;
5656 VEC_free (dwarf2_per_cu_ptr
, result_children
);
5657 htab_delete (all_children
);
5661 /* Compute the 'includes' field for the symtabs of all the CUs we just
5665 process_cu_includes (void)
5668 struct dwarf2_per_cu_data
*iter
;
5671 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
5674 compute_symtab_includes (iter
);
5676 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
5679 /* Generate full symbol information for PER_CU, whose DIEs have
5680 already been loaded into memory. */
5683 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
5684 enum language pretend_language
)
5686 struct dwarf2_cu
*cu
= per_cu
->cu
;
5687 struct objfile
*objfile
= per_cu
->objfile
;
5688 CORE_ADDR lowpc
, highpc
;
5689 struct symtab
*symtab
;
5690 struct cleanup
*back_to
, *delayed_list_cleanup
;
5693 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5696 back_to
= make_cleanup (really_free_pendings
, NULL
);
5697 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
5699 cu
->list_in_scope
= &file_symbols
;
5701 cu
->language
= pretend_language
;
5702 cu
->language_defn
= language_def (cu
->language
);
5704 /* Do line number decoding in read_file_scope () */
5705 process_die (cu
->dies
, cu
);
5707 /* For now fudge the Go package. */
5708 if (cu
->language
== language_go
)
5709 fixup_go_packaging (cu
);
5711 /* Now that we have processed all the DIEs in the CU, all the types
5712 should be complete, and it should now be safe to compute all of the
5714 compute_delayed_physnames (cu
);
5715 do_cleanups (delayed_list_cleanup
);
5717 /* Some compilers don't define a DW_AT_high_pc attribute for the
5718 compilation unit. If the DW_AT_high_pc is missing, synthesize
5719 it, by scanning the DIE's below the compilation unit. */
5720 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
5722 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
5726 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
5728 /* Set symtab language to language from DW_AT_language. If the
5729 compilation is from a C file generated by language preprocessors, do
5730 not set the language if it was already deduced by start_subfile. */
5731 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
5732 symtab
->language
= cu
->language
;
5734 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
5735 produce DW_AT_location with location lists but it can be possibly
5736 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
5737 there were bugs in prologue debug info, fixed later in GCC-4.5
5738 by "unwind info for epilogues" patch (which is not directly related).
5740 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
5741 needed, it would be wrong due to missing DW_AT_producer there.
5743 Still one can confuse GDB by using non-standard GCC compilation
5744 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
5746 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
5747 symtab
->locations_valid
= 1;
5749 if (gcc_4_minor
>= 5)
5750 symtab
->epilogue_unwind_valid
= 1;
5752 symtab
->call_site_htab
= cu
->call_site_htab
;
5755 if (dwarf2_per_objfile
->using_index
)
5756 per_cu
->v
.quick
->symtab
= symtab
;
5759 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5760 pst
->symtab
= symtab
;
5764 /* Push it for inclusion processing later. */
5765 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
5767 do_cleanups (back_to
);
5770 /* Process an imported unit DIE. */
5773 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
5775 struct attribute
*attr
;
5777 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5780 struct dwarf2_per_cu_data
*per_cu
;
5781 struct symtab
*imported_symtab
;
5784 offset
= dwarf2_get_ref_die_offset (attr
);
5785 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5787 /* Queue the unit, if needed. */
5788 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
5789 load_full_comp_unit (per_cu
, cu
->language
);
5791 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
5796 /* Process a die and its children. */
5799 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
5803 case DW_TAG_padding
:
5805 case DW_TAG_compile_unit
:
5806 case DW_TAG_partial_unit
:
5807 read_file_scope (die
, cu
);
5809 case DW_TAG_type_unit
:
5810 read_type_unit_scope (die
, cu
);
5812 case DW_TAG_subprogram
:
5813 case DW_TAG_inlined_subroutine
:
5814 read_func_scope (die
, cu
);
5816 case DW_TAG_lexical_block
:
5817 case DW_TAG_try_block
:
5818 case DW_TAG_catch_block
:
5819 read_lexical_block_scope (die
, cu
);
5821 case DW_TAG_GNU_call_site
:
5822 read_call_site_scope (die
, cu
);
5824 case DW_TAG_class_type
:
5825 case DW_TAG_interface_type
:
5826 case DW_TAG_structure_type
:
5827 case DW_TAG_union_type
:
5828 process_structure_scope (die
, cu
);
5830 case DW_TAG_enumeration_type
:
5831 process_enumeration_scope (die
, cu
);
5834 /* These dies have a type, but processing them does not create
5835 a symbol or recurse to process the children. Therefore we can
5836 read them on-demand through read_type_die. */
5837 case DW_TAG_subroutine_type
:
5838 case DW_TAG_set_type
:
5839 case DW_TAG_array_type
:
5840 case DW_TAG_pointer_type
:
5841 case DW_TAG_ptr_to_member_type
:
5842 case DW_TAG_reference_type
:
5843 case DW_TAG_string_type
:
5846 case DW_TAG_base_type
:
5847 case DW_TAG_subrange_type
:
5848 case DW_TAG_typedef
:
5849 /* Add a typedef symbol for the type definition, if it has a
5851 new_symbol (die
, read_type_die (die
, cu
), cu
);
5853 case DW_TAG_common_block
:
5854 read_common_block (die
, cu
);
5856 case DW_TAG_common_inclusion
:
5858 case DW_TAG_namespace
:
5859 processing_has_namespace_info
= 1;
5860 read_namespace (die
, cu
);
5863 processing_has_namespace_info
= 1;
5864 read_module (die
, cu
);
5866 case DW_TAG_imported_declaration
:
5867 case DW_TAG_imported_module
:
5868 processing_has_namespace_info
= 1;
5869 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
5870 || cu
->language
!= language_fortran
))
5871 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
5872 dwarf_tag_name (die
->tag
));
5873 read_import_statement (die
, cu
);
5876 case DW_TAG_imported_unit
:
5877 process_imported_unit_die (die
, cu
);
5881 new_symbol (die
, NULL
, cu
);
5886 /* A helper function for dwarf2_compute_name which determines whether DIE
5887 needs to have the name of the scope prepended to the name listed in the
5891 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5893 struct attribute
*attr
;
5897 case DW_TAG_namespace
:
5898 case DW_TAG_typedef
:
5899 case DW_TAG_class_type
:
5900 case DW_TAG_interface_type
:
5901 case DW_TAG_structure_type
:
5902 case DW_TAG_union_type
:
5903 case DW_TAG_enumeration_type
:
5904 case DW_TAG_enumerator
:
5905 case DW_TAG_subprogram
:
5909 case DW_TAG_variable
:
5910 case DW_TAG_constant
:
5911 /* We only need to prefix "globally" visible variables. These include
5912 any variable marked with DW_AT_external or any variable that
5913 lives in a namespace. [Variables in anonymous namespaces
5914 require prefixing, but they are not DW_AT_external.] */
5916 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
5918 struct dwarf2_cu
*spec_cu
= cu
;
5920 return die_needs_namespace (die_specification (die
, &spec_cu
),
5924 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5925 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
5926 && die
->parent
->tag
!= DW_TAG_module
)
5928 /* A variable in a lexical block of some kind does not need a
5929 namespace, even though in C++ such variables may be external
5930 and have a mangled name. */
5931 if (die
->parent
->tag
== DW_TAG_lexical_block
5932 || die
->parent
->tag
== DW_TAG_try_block
5933 || die
->parent
->tag
== DW_TAG_catch_block
5934 || die
->parent
->tag
== DW_TAG_subprogram
)
5943 /* Retrieve the last character from a mem_file. */
5946 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
5948 char *last_char_p
= (char *) object
;
5951 *last_char_p
= buffer
[length
- 1];
5954 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
5955 compute the physname for the object, which include a method's:
5956 - formal parameters (C++/Java),
5957 - receiver type (Go),
5958 - return type (Java).
5960 The term "physname" is a bit confusing.
5961 For C++, for example, it is the demangled name.
5962 For Go, for example, it's the mangled name.
5964 For Ada, return the DIE's linkage name rather than the fully qualified
5965 name. PHYSNAME is ignored..
5967 The result is allocated on the objfile_obstack and canonicalized. */
5970 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
5973 struct objfile
*objfile
= cu
->objfile
;
5976 name
= dwarf2_name (die
, cu
);
5978 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
5979 compute it by typename_concat inside GDB. */
5980 if (cu
->language
== language_ada
5981 || (cu
->language
== language_fortran
&& physname
))
5983 /* For Ada unit, we prefer the linkage name over the name, as
5984 the former contains the exported name, which the user expects
5985 to be able to reference. Ideally, we want the user to be able
5986 to reference this entity using either natural or linkage name,
5987 but we haven't started looking at this enhancement yet. */
5988 struct attribute
*attr
;
5990 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5992 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5993 if (attr
&& DW_STRING (attr
))
5994 return DW_STRING (attr
);
5997 /* These are the only languages we know how to qualify names in. */
5999 && (cu
->language
== language_cplus
|| cu
->language
== language_java
6000 || cu
->language
== language_fortran
))
6002 if (die_needs_namespace (die
, cu
))
6006 struct ui_file
*buf
;
6008 prefix
= determine_prefix (die
, cu
);
6009 buf
= mem_fileopen ();
6010 if (*prefix
!= '\0')
6012 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
6015 fputs_unfiltered (prefixed_name
, buf
);
6016 xfree (prefixed_name
);
6019 fputs_unfiltered (name
, buf
);
6021 /* Template parameters may be specified in the DIE's DW_AT_name, or
6022 as children with DW_TAG_template_type_param or
6023 DW_TAG_value_type_param. If the latter, add them to the name
6024 here. If the name already has template parameters, then
6025 skip this step; some versions of GCC emit both, and
6026 it is more efficient to use the pre-computed name.
6028 Something to keep in mind about this process: it is very
6029 unlikely, or in some cases downright impossible, to produce
6030 something that will match the mangled name of a function.
6031 If the definition of the function has the same debug info,
6032 we should be able to match up with it anyway. But fallbacks
6033 using the minimal symbol, for instance to find a method
6034 implemented in a stripped copy of libstdc++, will not work.
6035 If we do not have debug info for the definition, we will have to
6036 match them up some other way.
6038 When we do name matching there is a related problem with function
6039 templates; two instantiated function templates are allowed to
6040 differ only by their return types, which we do not add here. */
6042 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
6044 struct attribute
*attr
;
6045 struct die_info
*child
;
6048 die
->building_fullname
= 1;
6050 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
6055 struct dwarf2_locexpr_baton
*baton
;
6058 if (child
->tag
!= DW_TAG_template_type_param
6059 && child
->tag
!= DW_TAG_template_value_param
)
6064 fputs_unfiltered ("<", buf
);
6068 fputs_unfiltered (", ", buf
);
6070 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
6073 complaint (&symfile_complaints
,
6074 _("template parameter missing DW_AT_type"));
6075 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
6078 type
= die_type (child
, cu
);
6080 if (child
->tag
== DW_TAG_template_type_param
)
6082 c_print_type (type
, "", buf
, -1, 0);
6086 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
6089 complaint (&symfile_complaints
,
6090 _("template parameter missing "
6091 "DW_AT_const_value"));
6092 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
6096 dwarf2_const_value_attr (attr
, type
, name
,
6097 &cu
->comp_unit_obstack
, cu
,
6098 &value
, &bytes
, &baton
);
6100 if (TYPE_NOSIGN (type
))
6101 /* GDB prints characters as NUMBER 'CHAR'. If that's
6102 changed, this can use value_print instead. */
6103 c_printchar (value
, type
, buf
);
6106 struct value_print_options opts
;
6109 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
6113 else if (bytes
!= NULL
)
6115 v
= allocate_value (type
);
6116 memcpy (value_contents_writeable (v
), bytes
,
6117 TYPE_LENGTH (type
));
6120 v
= value_from_longest (type
, value
);
6122 /* Specify decimal so that we do not depend on
6124 get_formatted_print_options (&opts
, 'd');
6126 value_print (v
, buf
, &opts
);
6132 die
->building_fullname
= 0;
6136 /* Close the argument list, with a space if necessary
6137 (nested templates). */
6138 char last_char
= '\0';
6139 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
6140 if (last_char
== '>')
6141 fputs_unfiltered (" >", buf
);
6143 fputs_unfiltered (">", buf
);
6147 /* For Java and C++ methods, append formal parameter type
6148 information, if PHYSNAME. */
6150 if (physname
&& die
->tag
== DW_TAG_subprogram
6151 && (cu
->language
== language_cplus
6152 || cu
->language
== language_java
))
6154 struct type
*type
= read_type_die (die
, cu
);
6156 c_type_print_args (type
, buf
, 1, cu
->language
);
6158 if (cu
->language
== language_java
)
6160 /* For java, we must append the return type to method
6162 if (die
->tag
== DW_TAG_subprogram
)
6163 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
6166 else if (cu
->language
== language_cplus
)
6168 /* Assume that an artificial first parameter is
6169 "this", but do not crash if it is not. RealView
6170 marks unnamed (and thus unused) parameters as
6171 artificial; there is no way to differentiate
6173 if (TYPE_NFIELDS (type
) > 0
6174 && TYPE_FIELD_ARTIFICIAL (type
, 0)
6175 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
6176 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
6178 fputs_unfiltered (" const", buf
);
6182 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
6184 ui_file_delete (buf
);
6186 if (cu
->language
== language_cplus
)
6189 = dwarf2_canonicalize_name (name
, cu
,
6190 &objfile
->objfile_obstack
);
6201 /* Return the fully qualified name of DIE, based on its DW_AT_name.
6202 If scope qualifiers are appropriate they will be added. The result
6203 will be allocated on the objfile_obstack, or NULL if the DIE does
6204 not have a name. NAME may either be from a previous call to
6205 dwarf2_name or NULL.
6207 The output string will be canonicalized (if C++/Java). */
6210 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
6212 return dwarf2_compute_name (name
, die
, cu
, 0);
6215 /* Construct a physname for the given DIE in CU. NAME may either be
6216 from a previous call to dwarf2_name or NULL. The result will be
6217 allocated on the objfile_objstack or NULL if the DIE does not have a
6220 The output string will be canonicalized (if C++/Java). */
6223 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
6225 struct objfile
*objfile
= cu
->objfile
;
6226 struct attribute
*attr
;
6227 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
6228 struct cleanup
*back_to
;
6231 /* In this case dwarf2_compute_name is just a shortcut not building anything
6233 if (!die_needs_namespace (die
, cu
))
6234 return dwarf2_compute_name (name
, die
, cu
, 1);
6236 back_to
= make_cleanup (null_cleanup
, NULL
);
6238 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
6240 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
6242 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
6244 if (attr
&& DW_STRING (attr
))
6248 mangled
= DW_STRING (attr
);
6250 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
6251 type. It is easier for GDB users to search for such functions as
6252 `name(params)' than `long name(params)'. In such case the minimal
6253 symbol names do not match the full symbol names but for template
6254 functions there is never a need to look up their definition from their
6255 declaration so the only disadvantage remains the minimal symbol
6256 variant `long name(params)' does not have the proper inferior type.
6259 if (cu
->language
== language_go
)
6261 /* This is a lie, but we already lie to the caller new_symbol_full.
6262 new_symbol_full assumes we return the mangled name.
6263 This just undoes that lie until things are cleaned up. */
6268 demangled
= cplus_demangle (mangled
,
6269 (DMGL_PARAMS
| DMGL_ANSI
6270 | (cu
->language
== language_java
6271 ? DMGL_JAVA
| DMGL_RET_POSTFIX
6276 make_cleanup (xfree
, demangled
);
6286 if (canon
== NULL
|| check_physname
)
6288 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
6290 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
6292 /* It may not mean a bug in GDB. The compiler could also
6293 compute DW_AT_linkage_name incorrectly. But in such case
6294 GDB would need to be bug-to-bug compatible. */
6296 complaint (&symfile_complaints
,
6297 _("Computed physname <%s> does not match demangled <%s> "
6298 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
6299 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
6301 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
6302 is available here - over computed PHYSNAME. It is safer
6303 against both buggy GDB and buggy compilers. */
6317 retval
= obsavestring (retval
, strlen (retval
),
6318 &objfile
->objfile_obstack
);
6320 do_cleanups (back_to
);
6324 /* Read the import statement specified by the given die and record it. */
6327 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
6329 struct objfile
*objfile
= cu
->objfile
;
6330 struct attribute
*import_attr
;
6331 struct die_info
*imported_die
, *child_die
;
6332 struct dwarf2_cu
*imported_cu
;
6333 const char *imported_name
;
6334 const char *imported_name_prefix
;
6335 const char *canonical_name
;
6336 const char *import_alias
;
6337 const char *imported_declaration
= NULL
;
6338 const char *import_prefix
;
6339 VEC (const_char_ptr
) *excludes
= NULL
;
6340 struct cleanup
*cleanups
;
6344 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
6345 if (import_attr
== NULL
)
6347 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
6348 dwarf_tag_name (die
->tag
));
6353 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
6354 imported_name
= dwarf2_name (imported_die
, imported_cu
);
6355 if (imported_name
== NULL
)
6357 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
6359 The import in the following code:
6373 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
6374 <52> DW_AT_decl_file : 1
6375 <53> DW_AT_decl_line : 6
6376 <54> DW_AT_import : <0x75>
6377 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
6379 <5b> DW_AT_decl_file : 1
6380 <5c> DW_AT_decl_line : 2
6381 <5d> DW_AT_type : <0x6e>
6383 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
6384 <76> DW_AT_byte_size : 4
6385 <77> DW_AT_encoding : 5 (signed)
6387 imports the wrong die ( 0x75 instead of 0x58 ).
6388 This case will be ignored until the gcc bug is fixed. */
6392 /* Figure out the local name after import. */
6393 import_alias
= dwarf2_name (die
, cu
);
6395 /* Figure out where the statement is being imported to. */
6396 import_prefix
= determine_prefix (die
, cu
);
6398 /* Figure out what the scope of the imported die is and prepend it
6399 to the name of the imported die. */
6400 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
6402 if (imported_die
->tag
!= DW_TAG_namespace
6403 && imported_die
->tag
!= DW_TAG_module
)
6405 imported_declaration
= imported_name
;
6406 canonical_name
= imported_name_prefix
;
6408 else if (strlen (imported_name_prefix
) > 0)
6410 temp
= alloca (strlen (imported_name_prefix
)
6411 + 2 + strlen (imported_name
) + 1);
6412 strcpy (temp
, imported_name_prefix
);
6413 strcat (temp
, "::");
6414 strcat (temp
, imported_name
);
6415 canonical_name
= temp
;
6418 canonical_name
= imported_name
;
6420 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
6422 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
6423 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
6424 child_die
= sibling_die (child_die
))
6426 /* DWARF-4: A Fortran use statement with a “rename list” may be
6427 represented by an imported module entry with an import attribute
6428 referring to the module and owned entries corresponding to those
6429 entities that are renamed as part of being imported. */
6431 if (child_die
->tag
!= DW_TAG_imported_declaration
)
6433 complaint (&symfile_complaints
,
6434 _("child DW_TAG_imported_declaration expected "
6435 "- DIE at 0x%x [in module %s]"),
6436 child_die
->offset
.sect_off
, objfile
->name
);
6440 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
6441 if (import_attr
== NULL
)
6443 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
6444 dwarf_tag_name (child_die
->tag
));
6449 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
6451 imported_name
= dwarf2_name (imported_die
, imported_cu
);
6452 if (imported_name
== NULL
)
6454 complaint (&symfile_complaints
,
6455 _("child DW_TAG_imported_declaration has unknown "
6456 "imported name - DIE at 0x%x [in module %s]"),
6457 child_die
->offset
.sect_off
, objfile
->name
);
6461 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
6463 process_die (child_die
, cu
);
6466 cp_add_using_directive (import_prefix
,
6469 imported_declaration
,
6471 &objfile
->objfile_obstack
);
6473 do_cleanups (cleanups
);
6476 /* Cleanup function for read_file_scope. */
6479 free_cu_line_header (void *arg
)
6481 struct dwarf2_cu
*cu
= arg
;
6483 free_line_header (cu
->line_header
);
6484 cu
->line_header
= NULL
;
6488 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
6489 char **name
, char **comp_dir
)
6491 struct attribute
*attr
;
6496 /* Find the filename. Do not use dwarf2_name here, since the filename
6497 is not a source language identifier. */
6498 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
6501 *name
= DW_STRING (attr
);
6504 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
6506 *comp_dir
= DW_STRING (attr
);
6507 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
6509 *comp_dir
= ldirname (*name
);
6510 if (*comp_dir
!= NULL
)
6511 make_cleanup (xfree
, *comp_dir
);
6513 if (*comp_dir
!= NULL
)
6515 /* Irix 6.2 native cc prepends <machine>.: to the compilation
6516 directory, get rid of it. */
6517 char *cp
= strchr (*comp_dir
, ':');
6519 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
6524 *name
= "<unknown>";
6527 /* Handle DW_AT_stmt_list for a compilation unit or type unit.
6528 DIE is the DW_TAG_compile_unit or DW_TAG_type_unit die for CU.
6529 COMP_DIR is the compilation directory.
6530 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
6533 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
6534 const char *comp_dir
, int want_line_info
)
6536 struct attribute
*attr
;
6538 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6541 unsigned int line_offset
= DW_UNSND (attr
);
6542 struct line_header
*line_header
6543 = dwarf_decode_line_header (line_offset
, cu
);
6547 cu
->line_header
= line_header
;
6548 make_cleanup (free_cu_line_header
, cu
);
6549 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, want_line_info
);
6554 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
6557 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6559 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6560 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6561 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
6562 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
6563 struct attribute
*attr
;
6565 char *comp_dir
= NULL
;
6566 struct die_info
*child_die
;
6567 bfd
*abfd
= objfile
->obfd
;
6570 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6572 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
6574 /* If we didn't find a lowpc, set it to highpc to avoid complaints
6575 from finish_block. */
6576 if (lowpc
== ((CORE_ADDR
) -1))
6581 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
6583 prepare_one_comp_unit (cu
, die
, cu
->language
);
6585 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
6586 standardised yet. As a workaround for the language detection we fall
6587 back to the DW_AT_producer string. */
6588 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
6589 cu
->language
= language_opencl
;
6591 /* Similar hack for Go. */
6592 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
6593 set_cu_language (DW_LANG_Go
, cu
);
6595 /* We assume that we're processing GCC output. */
6596 processing_gcc_compilation
= 2;
6598 processing_has_namespace_info
= 0;
6600 start_symtab (name
, comp_dir
, lowpc
);
6601 record_debugformat ("DWARF 2");
6602 record_producer (cu
->producer
);
6604 /* Decode line number information if present. We do this before
6605 processing child DIEs, so that the line header table is available
6606 for DW_AT_decl_file. */
6607 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 1);
6609 /* Process all dies in compilation unit. */
6610 if (die
->child
!= NULL
)
6612 child_die
= die
->child
;
6613 while (child_die
&& child_die
->tag
)
6615 process_die (child_die
, cu
);
6616 child_die
= sibling_die (child_die
);
6620 /* Decode macro information, if present. Dwarf 2 macro information
6621 refers to information in the line number info statement program
6622 header, so we can only read it if we've read the header
6624 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
6625 if (attr
&& cu
->line_header
)
6627 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
6628 complaint (&symfile_complaints
,
6629 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
6631 dwarf_decode_macros (cu
->line_header
, DW_UNSND (attr
),
6633 &dwarf2_per_objfile
->macro
, 1,
6638 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
6639 if (attr
&& cu
->line_header
)
6641 unsigned int macro_offset
= DW_UNSND (attr
);
6643 dwarf_decode_macros (cu
->line_header
, macro_offset
,
6645 &dwarf2_per_objfile
->macinfo
, 0,
6650 do_cleanups (back_to
);
6653 /* Process DW_TAG_type_unit.
6654 For TUs we want to skip the first top level sibling if it's not the
6655 actual type being defined by this TU. In this case the first top
6656 level sibling is there to provide context only. */
6659 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6661 struct objfile
*objfile
= cu
->objfile
;
6662 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6664 struct attribute
*attr
;
6666 char *comp_dir
= NULL
;
6667 struct die_info
*child_die
;
6668 bfd
*abfd
= objfile
->obfd
;
6670 /* start_symtab needs a low pc, but we don't really have one.
6671 Do what read_file_scope would do in the absence of such info. */
6672 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6674 /* Find the filename. Do not use dwarf2_name here, since the filename
6675 is not a source language identifier. */
6676 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
6678 name
= DW_STRING (attr
);
6680 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
6682 comp_dir
= DW_STRING (attr
);
6683 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
6685 comp_dir
= ldirname (name
);
6686 if (comp_dir
!= NULL
)
6687 make_cleanup (xfree
, comp_dir
);
6693 prepare_one_comp_unit (cu
, die
, language_minimal
);
6695 /* We assume that we're processing GCC output. */
6696 processing_gcc_compilation
= 2;
6698 processing_has_namespace_info
= 0;
6700 start_symtab (name
, comp_dir
, lowpc
);
6701 record_debugformat ("DWARF 2");
6702 record_producer (cu
->producer
);
6704 /* Decode line number information if present. We do this before
6705 processing child DIEs, so that the line header table is available
6706 for DW_AT_decl_file.
6707 We don't need the pc/line-number mapping for type units. */
6708 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 0);
6710 /* Process the dies in the type unit. */
6711 if (die
->child
== NULL
)
6713 dump_die_for_error (die
);
6714 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
6715 bfd_get_filename (abfd
));
6718 child_die
= die
->child
;
6720 while (child_die
&& child_die
->tag
)
6722 process_die (child_die
, cu
);
6724 child_die
= sibling_die (child_die
);
6727 do_cleanups (back_to
);
6733 hash_dwo_file (const void *item
)
6735 const struct dwo_file
*dwo_file
= item
;
6737 return htab_hash_string (dwo_file
->dwo_name
);
6741 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
6743 const struct dwo_file
*lhs
= item_lhs
;
6744 const struct dwo_file
*rhs
= item_rhs
;
6746 return strcmp (lhs
->dwo_name
, rhs
->dwo_name
) == 0;
6749 /* Allocate a hash table for DWO files. */
6752 allocate_dwo_file_hash_table (void)
6754 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6756 return htab_create_alloc_ex (41,
6760 &objfile
->objfile_obstack
,
6761 hashtab_obstack_allocate
,
6762 dummy_obstack_deallocate
);
6766 hash_dwo_unit (const void *item
)
6768 const struct dwo_unit
*dwo_unit
= item
;
6770 /* This drops the top 32 bits of the id, but is ok for a hash. */
6771 return dwo_unit
->signature
;
6775 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
6777 const struct dwo_unit
*lhs
= item_lhs
;
6778 const struct dwo_unit
*rhs
= item_rhs
;
6780 /* The signature is assumed to be unique within the DWO file.
6781 So while object file CU dwo_id's always have the value zero,
6782 that's OK, assuming each object file DWO file has only one CU,
6783 and that's the rule for now. */
6784 return lhs
->signature
== rhs
->signature
;
6787 /* Allocate a hash table for DWO CUs,TUs.
6788 There is one of these tables for each of CUs,TUs for each DWO file. */
6791 allocate_dwo_unit_table (struct objfile
*objfile
)
6793 /* Start out with a pretty small number.
6794 Generally DWO files contain only one CU and maybe some TUs. */
6795 return htab_create_alloc_ex (3,
6799 &objfile
->objfile_obstack
,
6800 hashtab_obstack_allocate
,
6801 dummy_obstack_deallocate
);
6804 /* This function is mapped across the sections and remembers the offset and
6805 size of each of the DWO debugging sections we are interested in. */
6808 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_file_ptr
)
6810 struct dwo_file
*dwo_file
= dwo_file_ptr
;
6811 const struct dwo_section_names
*names
= &dwo_section_names
;
6813 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
6815 dwo_file
->sections
.abbrev
.asection
= sectp
;
6816 dwo_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
6818 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
6820 dwo_file
->sections
.info
.asection
= sectp
;
6821 dwo_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
6823 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
6825 dwo_file
->sections
.line
.asection
= sectp
;
6826 dwo_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
6828 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
6830 dwo_file
->sections
.loc
.asection
= sectp
;
6831 dwo_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
6833 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
6835 dwo_file
->sections
.str
.asection
= sectp
;
6836 dwo_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
6838 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
6840 dwo_file
->sections
.str_offsets
.asection
= sectp
;
6841 dwo_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
6843 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
6845 struct dwarf2_section_info type_section
;
6847 memset (&type_section
, 0, sizeof (type_section
));
6848 type_section
.asection
= sectp
;
6849 type_section
.size
= bfd_get_section_size (sectp
);
6850 VEC_safe_push (dwarf2_section_info_def
, dwo_file
->sections
.types
,
6855 /* Structure used to pass data to create_debug_info_hash_table_reader. */
6857 struct create_dwo_info_table_data
6859 struct dwo_file
*dwo_file
;
6863 /* die_reader_func for create_debug_info_hash_table. */
6866 create_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
6868 struct die_info
*comp_unit_die
,
6872 struct dwarf2_cu
*cu
= reader
->cu
;
6873 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6874 sect_offset offset
= cu
->per_cu
->offset
;
6875 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
6876 struct create_dwo_info_table_data
*data
= datap
;
6877 struct dwo_file
*dwo_file
= data
->dwo_file
;
6878 htab_t cu_htab
= data
->cu_htab
;
6880 struct attribute
*attr
;
6881 struct dwo_unit
*dwo_unit
;
6883 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6886 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
6887 " its dwo_id [in module %s]"),
6888 offset
.sect_off
, dwo_file
->dwo_name
);
6892 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
6893 dwo_unit
->dwo_file
= dwo_file
;
6894 dwo_unit
->signature
= DW_UNSND (attr
);
6895 dwo_unit
->info_or_types_section
= section
;
6896 dwo_unit
->offset
= offset
;
6897 dwo_unit
->length
= cu
->per_cu
->length
;
6899 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
6900 gdb_assert (slot
!= NULL
);
6903 const struct dwo_unit
*dup_dwo_unit
= *slot
;
6905 complaint (&symfile_complaints
,
6906 _("debug entry at offset 0x%x is duplicate to the entry at"
6907 " offset 0x%x, dwo_id 0x%s [in module %s]"),
6908 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
6909 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
6910 dwo_file
->dwo_name
);
6915 if (dwarf2_die_debug
)
6916 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
6918 phex (dwo_unit
->signature
,
6919 sizeof (dwo_unit
->signature
)));
6922 /* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
6925 create_debug_info_hash_table (struct dwo_file
*dwo_file
)
6927 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6928 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
6931 gdb_byte
*info_ptr
, *end_ptr
;
6932 struct create_dwo_info_table_data create_dwo_info_table_data
;
6934 dwarf2_read_section (objfile
, section
);
6935 info_ptr
= section
->buffer
;
6937 if (info_ptr
== NULL
)
6940 /* We can't set abfd until now because the section may be empty or
6941 not present, in which case section->asection will be NULL. */
6942 abfd
= section
->asection
->owner
;
6944 if (dwarf2_die_debug
)
6945 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
6946 bfd_get_filename (abfd
));
6948 cu_htab
= allocate_dwo_unit_table (objfile
);
6950 create_dwo_info_table_data
.dwo_file
= dwo_file
;
6951 create_dwo_info_table_data
.cu_htab
= cu_htab
;
6953 end_ptr
= info_ptr
+ section
->size
;
6954 while (info_ptr
< end_ptr
)
6956 struct dwarf2_per_cu_data per_cu
;
6958 memset (&per_cu
, 0, sizeof (per_cu
));
6959 per_cu
.objfile
= objfile
;
6960 per_cu
.is_debug_types
= 0;
6961 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
6962 per_cu
.info_or_types_section
= section
;
6964 init_cutu_and_read_dies_no_follow (&per_cu
,
6965 &dwo_file
->sections
.abbrev
,
6967 create_debug_info_hash_table_reader
,
6968 &create_dwo_info_table_data
);
6970 info_ptr
+= per_cu
.length
;
6976 /* Subroutine of open_dwo_file to simplify it.
6977 Open the file specified by FILE_NAME and hand it off to BFD for
6978 preliminary analysis. Return a newly initialized bfd *, which
6979 includes a canonicalized copy of FILE_NAME.
6980 In case of trouble, return NULL.
6981 NOTE: This function is derived from symfile_bfd_open. */
6984 try_open_dwo_file (const char *file_name
)
6988 char *absolute_name
;
6990 desc
= openp (debug_file_directory
, OPF_TRY_CWD_FIRST
, file_name
,
6991 O_RDONLY
| O_BINARY
, &absolute_name
);
6995 sym_bfd
= bfd_fopen (absolute_name
, gnutarget
, FOPEN_RB
, desc
);
6998 xfree (absolute_name
);
7001 bfd_set_cacheable (sym_bfd
, 1);
7003 if (!bfd_check_format (sym_bfd
, bfd_object
))
7005 bfd_close (sym_bfd
); /* This also closes desc. */
7006 xfree (absolute_name
);
7010 /* bfd_usrdata exists for applications and libbfd must not touch it. */
7011 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
7016 /* Try to open DWO file DWO_NAME.
7017 COMP_DIR is the DW_AT_comp_dir attribute.
7018 The result is the bfd handle of the file.
7019 If there is a problem finding or opening the file, return NULL.
7020 Upon success, the canonicalized path of the file is stored in the bfd,
7021 same as symfile_bfd_open. */
7024 open_dwo_file (const char *dwo_name
, const char *comp_dir
)
7028 if (IS_ABSOLUTE_PATH (dwo_name
))
7029 return try_open_dwo_file (dwo_name
);
7031 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
7033 if (comp_dir
!= NULL
)
7035 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, dwo_name
, NULL
);
7037 /* NOTE: If comp_dir is a relative path, this will also try the
7038 search path, which seems useful. */
7039 abfd
= try_open_dwo_file (path_to_try
);
7040 xfree (path_to_try
);
7045 /* That didn't work, try debug-file-directory, which, despite its name,
7046 is a list of paths. */
7048 if (*debug_file_directory
== '\0')
7051 return try_open_dwo_file (dwo_name
);
7054 /* Initialize the use of the DWO file specified by DWO_NAME. */
7056 static struct dwo_file
*
7057 init_dwo_file (const char *dwo_name
, const char *comp_dir
)
7059 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7060 struct dwo_file
*dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7063 struct cleanup
*cleanups
;
7065 if (dwarf2_die_debug
)
7066 fprintf_unfiltered (gdb_stdlog
, "Reading DWO file %s:\n", dwo_name
);
7068 abfd
= open_dwo_file (dwo_name
, comp_dir
);
7071 dwo_file
->dwo_name
= dwo_name
;
7072 dwo_file
->dwo_bfd
= abfd
;
7074 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
7076 bfd_map_over_sections (abfd
, dwarf2_locate_dwo_sections
, dwo_file
);
7078 dwo_file
->cus
= create_debug_info_hash_table (dwo_file
);
7080 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
7081 dwo_file
->sections
.types
);
7083 discard_cleanups (cleanups
);
7088 /* Lookup DWO file DWO_NAME. */
7090 static struct dwo_file
*
7091 lookup_dwo_file (char *dwo_name
, const char *comp_dir
)
7093 struct dwo_file
*dwo_file
;
7094 struct dwo_file find_entry
;
7097 if (dwarf2_per_objfile
->dwo_files
== NULL
)
7098 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
7100 /* Have we already seen this DWO file? */
7101 find_entry
.dwo_name
= dwo_name
;
7102 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
7104 /* If not, read it in and build a table of the DWOs it contains. */
7106 *slot
= init_dwo_file (dwo_name
, comp_dir
);
7108 /* NOTE: This will be NULL if unable to open the file. */
7114 /* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
7115 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
7116 SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
7117 nomenclature as TUs).
7118 The result is the DWO CU or NULL if we didn't find it
7119 (dwo_id mismatch or couldn't find the DWO file). */
7121 static struct dwo_unit
*
7122 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7123 char *dwo_name
, const char *comp_dir
,
7126 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7127 struct dwo_file
*dwo_file
;
7129 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
7130 if (dwo_file
== NULL
)
7133 /* Look up the DWO using its signature(dwo_id). */
7135 if (dwo_file
->cus
!= NULL
)
7137 struct dwo_unit find_dwo_cu
, *dwo_cu
;
7139 find_dwo_cu
.signature
= signature
;
7140 dwo_cu
= htab_find (dwo_file
->cus
, &find_dwo_cu
);
7146 /* We didn't find it. This must mean a dwo_id mismatch. */
7148 complaint (&symfile_complaints
,
7149 _("Could not find DWO CU referenced by CU at offset 0x%x"
7151 this_cu
->offset
.sect_off
, objfile
->name
);
7155 /* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
7156 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
7157 The result is the DWO CU or NULL if we didn't find it
7158 (dwo_id mismatch or couldn't find the DWO file). */
7160 static struct dwo_unit
*
7161 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
7162 char *dwo_name
, const char *comp_dir
)
7164 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7165 struct dwo_file
*dwo_file
;
7167 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
7168 if (dwo_file
== NULL
)
7171 /* Look up the DWO using its signature(dwo_id). */
7173 if (dwo_file
->tus
!= NULL
)
7175 struct dwo_unit find_dwo_tu
, *dwo_tu
;
7177 find_dwo_tu
.signature
= this_tu
->signature
;
7178 dwo_tu
= htab_find (dwo_file
->tus
, &find_dwo_tu
);
7184 /* We didn't find it. This must mean a dwo_id mismatch. */
7186 complaint (&symfile_complaints
,
7187 _("Could not find DWO TU referenced by TU at offset 0x%x"
7189 this_tu
->per_cu
.offset
.sect_off
, objfile
->name
);
7193 /* Free all resources associated with DWO_FILE.
7194 Close the DWO file and munmap the sections.
7195 All memory should be on the objfile obstack. */
7198 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
7201 struct dwarf2_section_info
*section
;
7203 gdb_assert (dwo_file
->dwo_bfd
!= objfile
->obfd
);
7204 bfd_close (dwo_file
->dwo_bfd
);
7206 munmap_section_buffer (&dwo_file
->sections
.abbrev
);
7207 munmap_section_buffer (&dwo_file
->sections
.info
);
7208 munmap_section_buffer (&dwo_file
->sections
.line
);
7209 munmap_section_buffer (&dwo_file
->sections
.loc
);
7210 munmap_section_buffer (&dwo_file
->sections
.str
);
7211 munmap_section_buffer (&dwo_file
->sections
.str_offsets
);
7214 VEC_iterate (dwarf2_section_info_def
, dwo_file
->sections
.types
,
7217 munmap_section_buffer (section
);
7219 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
7222 /* Wrapper for free_dwo_file for use in cleanups. */
7225 free_dwo_file_cleanup (void *arg
)
7227 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
7228 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7230 free_dwo_file (dwo_file
, objfile
);
7233 /* Traversal function for free_dwo_files. */
7236 free_dwo_file_from_slot (void **slot
, void *info
)
7238 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7239 struct objfile
*objfile
= (struct objfile
*) info
;
7241 free_dwo_file (dwo_file
, objfile
);
7246 /* Free all resources associated with DWO_FILES. */
7249 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
7251 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
7254 /* Read in various DIEs. */
7256 /* qsort helper for inherit_abstract_dies. */
7259 unsigned_int_compar (const void *ap
, const void *bp
)
7261 unsigned int a
= *(unsigned int *) ap
;
7262 unsigned int b
= *(unsigned int *) bp
;
7264 return (a
> b
) - (b
> a
);
7267 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
7268 Inherit only the children of the DW_AT_abstract_origin DIE not being
7269 already referenced by DW_AT_abstract_origin from the children of the
7273 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
7275 struct die_info
*child_die
;
7276 unsigned die_children_count
;
7277 /* CU offsets which were referenced by children of the current DIE. */
7278 sect_offset
*offsets
;
7279 sect_offset
*offsets_end
, *offsetp
;
7280 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
7281 struct die_info
*origin_die
;
7282 /* Iterator of the ORIGIN_DIE children. */
7283 struct die_info
*origin_child_die
;
7284 struct cleanup
*cleanups
;
7285 struct attribute
*attr
;
7286 struct dwarf2_cu
*origin_cu
;
7287 struct pending
**origin_previous_list_in_scope
;
7289 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
7293 /* Note that following die references may follow to a die in a
7297 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
7299 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
7301 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
7302 origin_cu
->list_in_scope
= cu
->list_in_scope
;
7304 if (die
->tag
!= origin_die
->tag
7305 && !(die
->tag
== DW_TAG_inlined_subroutine
7306 && origin_die
->tag
== DW_TAG_subprogram
))
7307 complaint (&symfile_complaints
,
7308 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
7309 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
7311 child_die
= die
->child
;
7312 die_children_count
= 0;
7313 while (child_die
&& child_die
->tag
)
7315 child_die
= sibling_die (child_die
);
7316 die_children_count
++;
7318 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
7319 cleanups
= make_cleanup (xfree
, offsets
);
7321 offsets_end
= offsets
;
7322 child_die
= die
->child
;
7323 while (child_die
&& child_die
->tag
)
7325 /* For each CHILD_DIE, find the corresponding child of
7326 ORIGIN_DIE. If there is more than one layer of
7327 DW_AT_abstract_origin, follow them all; there shouldn't be,
7328 but GCC versions at least through 4.4 generate this (GCC PR
7330 struct die_info
*child_origin_die
= child_die
;
7331 struct dwarf2_cu
*child_origin_cu
= cu
;
7335 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
7339 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
7343 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
7344 counterpart may exist. */
7345 if (child_origin_die
!= child_die
)
7347 if (child_die
->tag
!= child_origin_die
->tag
7348 && !(child_die
->tag
== DW_TAG_inlined_subroutine
7349 && child_origin_die
->tag
== DW_TAG_subprogram
))
7350 complaint (&symfile_complaints
,
7351 _("Child DIE 0x%x and its abstract origin 0x%x have "
7352 "different tags"), child_die
->offset
.sect_off
,
7353 child_origin_die
->offset
.sect_off
);
7354 if (child_origin_die
->parent
!= origin_die
)
7355 complaint (&symfile_complaints
,
7356 _("Child DIE 0x%x and its abstract origin 0x%x have "
7357 "different parents"), child_die
->offset
.sect_off
,
7358 child_origin_die
->offset
.sect_off
);
7360 *offsets_end
++ = child_origin_die
->offset
;
7362 child_die
= sibling_die (child_die
);
7364 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
7365 unsigned_int_compar
);
7366 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
7367 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
7368 complaint (&symfile_complaints
,
7369 _("Multiple children of DIE 0x%x refer "
7370 "to DIE 0x%x as their abstract origin"),
7371 die
->offset
.sect_off
, offsetp
->sect_off
);
7374 origin_child_die
= origin_die
->child
;
7375 while (origin_child_die
&& origin_child_die
->tag
)
7377 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
7378 while (offsetp
< offsets_end
7379 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
7381 if (offsetp
>= offsets_end
7382 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
7384 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
7385 process_die (origin_child_die
, origin_cu
);
7387 origin_child_die
= sibling_die (origin_child_die
);
7389 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
7391 do_cleanups (cleanups
);
7395 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7397 struct objfile
*objfile
= cu
->objfile
;
7398 struct context_stack
*new;
7401 struct die_info
*child_die
;
7402 struct attribute
*attr
, *call_line
, *call_file
;
7405 struct block
*block
;
7406 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
7407 VEC (symbolp
) *template_args
= NULL
;
7408 struct template_symbol
*templ_func
= NULL
;
7412 /* If we do not have call site information, we can't show the
7413 caller of this inlined function. That's too confusing, so
7414 only use the scope for local variables. */
7415 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
7416 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
7417 if (call_line
== NULL
|| call_file
== NULL
)
7419 read_lexical_block_scope (die
, cu
);
7424 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7426 name
= dwarf2_name (die
, cu
);
7428 /* Ignore functions with missing or empty names. These are actually
7429 illegal according to the DWARF standard. */
7432 complaint (&symfile_complaints
,
7433 _("missing name for subprogram DIE at %d"),
7434 die
->offset
.sect_off
);
7438 /* Ignore functions with missing or invalid low and high pc attributes. */
7439 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
7441 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7442 if (!attr
|| !DW_UNSND (attr
))
7443 complaint (&symfile_complaints
,
7444 _("cannot get low and high bounds "
7445 "for subprogram DIE at %d"),
7446 die
->offset
.sect_off
);
7453 /* If we have any template arguments, then we must allocate a
7454 different sort of symbol. */
7455 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
7457 if (child_die
->tag
== DW_TAG_template_type_param
7458 || child_die
->tag
== DW_TAG_template_value_param
)
7460 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7461 struct template_symbol
);
7462 templ_func
->base
.is_cplus_template_function
= 1;
7467 new = push_context (0, lowpc
);
7468 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
7469 (struct symbol
*) templ_func
);
7471 /* If there is a location expression for DW_AT_frame_base, record
7473 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
7475 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
7476 expression is being recorded directly in the function's symbol
7477 and not in a separate frame-base object. I guess this hack is
7478 to avoid adding some sort of frame-base adjunct/annex to the
7479 function's symbol :-(. The problem with doing this is that it
7480 results in a function symbol with a location expression that
7481 has nothing to do with the location of the function, ouch! The
7482 relationship should be: a function's symbol has-a frame base; a
7483 frame-base has-a location expression. */
7484 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
7486 cu
->list_in_scope
= &local_symbols
;
7488 if (die
->child
!= NULL
)
7490 child_die
= die
->child
;
7491 while (child_die
&& child_die
->tag
)
7493 if (child_die
->tag
== DW_TAG_template_type_param
7494 || child_die
->tag
== DW_TAG_template_value_param
)
7496 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7499 VEC_safe_push (symbolp
, template_args
, arg
);
7502 process_die (child_die
, cu
);
7503 child_die
= sibling_die (child_die
);
7507 inherit_abstract_dies (die
, cu
);
7509 /* If we have a DW_AT_specification, we might need to import using
7510 directives from the context of the specification DIE. See the
7511 comment in determine_prefix. */
7512 if (cu
->language
== language_cplus
7513 && dwarf2_attr (die
, DW_AT_specification
, cu
))
7515 struct dwarf2_cu
*spec_cu
= cu
;
7516 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
7520 child_die
= spec_die
->child
;
7521 while (child_die
&& child_die
->tag
)
7523 if (child_die
->tag
== DW_TAG_imported_module
)
7524 process_die (child_die
, spec_cu
);
7525 child_die
= sibling_die (child_die
);
7528 /* In some cases, GCC generates specification DIEs that
7529 themselves contain DW_AT_specification attributes. */
7530 spec_die
= die_specification (spec_die
, &spec_cu
);
7534 new = pop_context ();
7535 /* Make a block for the local symbols within. */
7536 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
7537 lowpc
, highpc
, objfile
);
7539 /* For C++, set the block's scope. */
7540 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
7541 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
7542 determine_prefix (die
, cu
),
7543 processing_has_namespace_info
);
7545 /* If we have address ranges, record them. */
7546 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
7548 /* Attach template arguments to function. */
7549 if (! VEC_empty (symbolp
, template_args
))
7551 gdb_assert (templ_func
!= NULL
);
7553 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
7554 templ_func
->template_arguments
7555 = obstack_alloc (&objfile
->objfile_obstack
,
7556 (templ_func
->n_template_arguments
7557 * sizeof (struct symbol
*)));
7558 memcpy (templ_func
->template_arguments
,
7559 VEC_address (symbolp
, template_args
),
7560 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
7561 VEC_free (symbolp
, template_args
);
7564 /* In C++, we can have functions nested inside functions (e.g., when
7565 a function declares a class that has methods). This means that
7566 when we finish processing a function scope, we may need to go
7567 back to building a containing block's symbol lists. */
7568 local_symbols
= new->locals
;
7569 param_symbols
= new->params
;
7570 using_directives
= new->using_directives
;
7572 /* If we've finished processing a top-level function, subsequent
7573 symbols go in the file symbol list. */
7574 if (outermost_context_p ())
7575 cu
->list_in_scope
= &file_symbols
;
7578 /* Process all the DIES contained within a lexical block scope. Start
7579 a new scope, process the dies, and then close the scope. */
7582 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7584 struct objfile
*objfile
= cu
->objfile
;
7585 struct context_stack
*new;
7586 CORE_ADDR lowpc
, highpc
;
7587 struct die_info
*child_die
;
7590 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7592 /* Ignore blocks with missing or invalid low and high pc attributes. */
7593 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
7594 as multiple lexical blocks? Handling children in a sane way would
7595 be nasty. Might be easier to properly extend generic blocks to
7597 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
7602 push_context (0, lowpc
);
7603 if (die
->child
!= NULL
)
7605 child_die
= die
->child
;
7606 while (child_die
&& child_die
->tag
)
7608 process_die (child_die
, cu
);
7609 child_die
= sibling_die (child_die
);
7612 new = pop_context ();
7614 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
7617 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
7620 /* Note that recording ranges after traversing children, as we
7621 do here, means that recording a parent's ranges entails
7622 walking across all its children's ranges as they appear in
7623 the address map, which is quadratic behavior.
7625 It would be nicer to record the parent's ranges before
7626 traversing its children, simply overriding whatever you find
7627 there. But since we don't even decide whether to create a
7628 block until after we've traversed its children, that's hard
7630 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
7632 local_symbols
= new->locals
;
7633 using_directives
= new->using_directives
;
7636 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
7639 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7641 struct objfile
*objfile
= cu
->objfile
;
7642 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7643 CORE_ADDR pc
, baseaddr
;
7644 struct attribute
*attr
;
7645 struct call_site
*call_site
, call_site_local
;
7648 struct die_info
*child_die
;
7650 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7652 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7655 complaint (&symfile_complaints
,
7656 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
7657 "DIE 0x%x [in module %s]"),
7658 die
->offset
.sect_off
, objfile
->name
);
7661 pc
= DW_ADDR (attr
) + baseaddr
;
7663 if (cu
->call_site_htab
== NULL
)
7664 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
7665 NULL
, &objfile
->objfile_obstack
,
7666 hashtab_obstack_allocate
, NULL
);
7667 call_site_local
.pc
= pc
;
7668 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
7671 complaint (&symfile_complaints
,
7672 _("Duplicate PC %s for DW_TAG_GNU_call_site "
7673 "DIE 0x%x [in module %s]"),
7674 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
7678 /* Count parameters at the caller. */
7681 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7682 child_die
= sibling_die (child_die
))
7684 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
7686 complaint (&symfile_complaints
,
7687 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
7688 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7689 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
7696 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
7697 (sizeof (*call_site
)
7698 + (sizeof (*call_site
->parameter
)
7701 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
7704 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
7706 struct die_info
*func_die
;
7708 /* Skip also over DW_TAG_inlined_subroutine. */
7709 for (func_die
= die
->parent
;
7710 func_die
&& func_die
->tag
!= DW_TAG_subprogram
7711 && func_die
->tag
!= DW_TAG_subroutine_type
;
7712 func_die
= func_die
->parent
);
7714 /* DW_AT_GNU_all_call_sites is a superset
7715 of DW_AT_GNU_all_tail_call_sites. */
7717 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
7718 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
7720 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
7721 not complete. But keep CALL_SITE for look ups via call_site_htab,
7722 both the initial caller containing the real return address PC and
7723 the final callee containing the current PC of a chain of tail
7724 calls do not need to have the tail call list complete. But any
7725 function candidate for a virtual tail call frame searched via
7726 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
7727 determined unambiguously. */
7731 struct type
*func_type
= NULL
;
7734 func_type
= get_die_type (func_die
, cu
);
7735 if (func_type
!= NULL
)
7737 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
7739 /* Enlist this call site to the function. */
7740 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
7741 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
7744 complaint (&symfile_complaints
,
7745 _("Cannot find function owning DW_TAG_GNU_call_site "
7746 "DIE 0x%x [in module %s]"),
7747 die
->offset
.sect_off
, objfile
->name
);
7751 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
7753 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
7754 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
7755 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
7756 /* Keep NULL DWARF_BLOCK. */;
7757 else if (attr_form_is_block (attr
))
7759 struct dwarf2_locexpr_baton
*dlbaton
;
7761 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
7762 dlbaton
->data
= DW_BLOCK (attr
)->data
;
7763 dlbaton
->size
= DW_BLOCK (attr
)->size
;
7764 dlbaton
->per_cu
= cu
->per_cu
;
7766 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
7768 else if (is_ref_attr (attr
))
7770 struct dwarf2_cu
*target_cu
= cu
;
7771 struct die_info
*target_die
;
7773 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
7774 gdb_assert (target_cu
->objfile
== objfile
);
7775 if (die_is_declaration (target_die
, target_cu
))
7777 const char *target_physname
;
7779 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
7780 if (target_physname
== NULL
)
7781 complaint (&symfile_complaints
,
7782 _("DW_AT_GNU_call_site_target target DIE has invalid "
7783 "physname, for referencing DIE 0x%x [in module %s]"),
7784 die
->offset
.sect_off
, objfile
->name
);
7786 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
7792 /* DW_AT_entry_pc should be preferred. */
7793 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
7794 complaint (&symfile_complaints
,
7795 _("DW_AT_GNU_call_site_target target DIE has invalid "
7796 "low pc, for referencing DIE 0x%x [in module %s]"),
7797 die
->offset
.sect_off
, objfile
->name
);
7799 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
7803 complaint (&symfile_complaints
,
7804 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
7805 "block nor reference, for DIE 0x%x [in module %s]"),
7806 die
->offset
.sect_off
, objfile
->name
);
7808 call_site
->per_cu
= cu
->per_cu
;
7810 for (child_die
= die
->child
;
7811 child_die
&& child_die
->tag
;
7812 child_die
= sibling_die (child_die
))
7814 struct call_site_parameter
*parameter
;
7815 struct attribute
*loc
, *origin
;
7817 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
7819 /* Already printed the complaint above. */
7823 gdb_assert (call_site
->parameter_count
< nparams
);
7824 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
7826 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
7827 specifies DW_TAG_formal_parameter. Value of the data assumed for the
7828 register is contained in DW_AT_GNU_call_site_value. */
7830 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
7831 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
7832 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
7836 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
7837 offset
= dwarf2_get_ref_die_offset (origin
);
7838 gdb_assert (offset
.sect_off
>= cu
->header
.offset
.sect_off
);
7839 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
7840 - cu
->header
.offset
.sect_off
);
7842 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
7844 complaint (&symfile_complaints
,
7845 _("No DW_FORM_block* DW_AT_location for "
7846 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7847 child_die
->offset
.sect_off
, objfile
->name
);
7852 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
7853 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
7854 if (parameter
->u
.dwarf_reg
!= -1)
7855 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
7856 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
7857 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
7858 ¶meter
->u
.fb_offset
))
7859 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
7862 complaint (&symfile_complaints
,
7863 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
7864 "for DW_FORM_block* DW_AT_location is supported for "
7865 "DW_TAG_GNU_call_site child DIE 0x%x "
7867 child_die
->offset
.sect_off
, objfile
->name
);
7872 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
7873 if (!attr_form_is_block (attr
))
7875 complaint (&symfile_complaints
,
7876 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
7877 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7878 child_die
->offset
.sect_off
, objfile
->name
);
7881 parameter
->value
= DW_BLOCK (attr
)->data
;
7882 parameter
->value_size
= DW_BLOCK (attr
)->size
;
7884 /* Parameters are not pre-cleared by memset above. */
7885 parameter
->data_value
= NULL
;
7886 parameter
->data_value_size
= 0;
7887 call_site
->parameter_count
++;
7889 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
7892 if (!attr_form_is_block (attr
))
7893 complaint (&symfile_complaints
,
7894 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
7895 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
7896 child_die
->offset
.sect_off
, objfile
->name
);
7899 parameter
->data_value
= DW_BLOCK (attr
)->data
;
7900 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
7906 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
7907 Return 1 if the attributes are present and valid, otherwise, return 0.
7908 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
7911 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
7912 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
7913 struct partial_symtab
*ranges_pst
)
7915 struct objfile
*objfile
= cu
->objfile
;
7916 struct comp_unit_head
*cu_header
= &cu
->header
;
7917 bfd
*obfd
= objfile
->obfd
;
7918 unsigned int addr_size
= cu_header
->addr_size
;
7919 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
7920 /* Base address selection entry. */
7931 found_base
= cu
->base_known
;
7932 base
= cu
->base_address
;
7934 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
7935 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
7937 complaint (&symfile_complaints
,
7938 _("Offset %d out of bounds for DW_AT_ranges attribute"),
7942 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
7944 /* Read in the largest possible address. */
7945 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
7946 if ((marker
& mask
) == mask
)
7948 /* If we found the largest possible address, then
7949 read the base address. */
7950 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
7951 buffer
+= 2 * addr_size
;
7952 offset
+= 2 * addr_size
;
7958 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7962 CORE_ADDR range_beginning
, range_end
;
7964 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
7965 buffer
+= addr_size
;
7966 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
7967 buffer
+= addr_size
;
7968 offset
+= 2 * addr_size
;
7970 /* An end of list marker is a pair of zero addresses. */
7971 if (range_beginning
== 0 && range_end
== 0)
7972 /* Found the end of list entry. */
7975 /* Each base address selection entry is a pair of 2 values.
7976 The first is the largest possible address, the second is
7977 the base address. Check for a base address here. */
7978 if ((range_beginning
& mask
) == mask
)
7980 /* If we found the largest possible address, then
7981 read the base address. */
7982 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
7989 /* We have no valid base address for the ranges
7991 complaint (&symfile_complaints
,
7992 _("Invalid .debug_ranges data (no base address)"));
7996 if (range_beginning
> range_end
)
7998 /* Inverted range entries are invalid. */
7999 complaint (&symfile_complaints
,
8000 _("Invalid .debug_ranges data (inverted range)"));
8004 /* Empty range entries have no effect. */
8005 if (range_beginning
== range_end
)
8008 range_beginning
+= base
;
8011 if (ranges_pst
!= NULL
)
8012 addrmap_set_empty (objfile
->psymtabs_addrmap
,
8013 range_beginning
+ baseaddr
,
8014 range_end
- 1 + baseaddr
,
8017 /* FIXME: This is recording everything as a low-high
8018 segment of consecutive addresses. We should have a
8019 data structure for discontiguous block ranges
8023 low
= range_beginning
;
8029 if (range_beginning
< low
)
8030 low
= range_beginning
;
8031 if (range_end
> high
)
8037 /* If the first entry is an end-of-list marker, the range
8038 describes an empty scope, i.e. no instructions. */
8044 *high_return
= high
;
8048 /* Get low and high pc attributes from a die. Return 1 if the attributes
8049 are present and valid, otherwise, return 0. Return -1 if the range is
8050 discontinuous, i.e. derived from DW_AT_ranges information. */
8053 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
8054 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
8055 struct partial_symtab
*pst
)
8057 struct attribute
*attr
;
8058 struct attribute
*attr_high
;
8063 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
8066 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8069 low
= DW_ADDR (attr
);
8070 if (attr_high
->form
== DW_FORM_addr
8071 || attr_high
->form
== DW_FORM_GNU_addr_index
)
8072 high
= DW_ADDR (attr_high
);
8074 high
= low
+ DW_UNSND (attr_high
);
8077 /* Found high w/o low attribute. */
8080 /* Found consecutive range of addresses. */
8085 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
8088 /* Value of the DW_AT_ranges attribute is the offset in the
8089 .debug_ranges section. */
8090 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
8092 /* Found discontinuous range of addresses. */
8097 /* read_partial_die has also the strict LOW < HIGH requirement. */
8101 /* When using the GNU linker, .gnu.linkonce. sections are used to
8102 eliminate duplicate copies of functions and vtables and such.
8103 The linker will arbitrarily choose one and discard the others.
8104 The AT_*_pc values for such functions refer to local labels in
8105 these sections. If the section from that file was discarded, the
8106 labels are not in the output, so the relocs get a value of 0.
8107 If this is a discarded function, mark the pc bounds as invalid,
8108 so that GDB will ignore it. */
8109 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
8118 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
8119 its low and high PC addresses. Do nothing if these addresses could not
8120 be determined. Otherwise, set LOWPC to the low address if it is smaller,
8121 and HIGHPC to the high address if greater than HIGHPC. */
8124 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
8125 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8126 struct dwarf2_cu
*cu
)
8128 CORE_ADDR low
, high
;
8129 struct die_info
*child
= die
->child
;
8131 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
8133 *lowpc
= min (*lowpc
, low
);
8134 *highpc
= max (*highpc
, high
);
8137 /* If the language does not allow nested subprograms (either inside
8138 subprograms or lexical blocks), we're done. */
8139 if (cu
->language
!= language_ada
)
8142 /* Check all the children of the given DIE. If it contains nested
8143 subprograms, then check their pc bounds. Likewise, we need to
8144 check lexical blocks as well, as they may also contain subprogram
8146 while (child
&& child
->tag
)
8148 if (child
->tag
== DW_TAG_subprogram
8149 || child
->tag
== DW_TAG_lexical_block
)
8150 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
8151 child
= sibling_die (child
);
8155 /* Get the low and high pc's represented by the scope DIE, and store
8156 them in *LOWPC and *HIGHPC. If the correct values can't be
8157 determined, set *LOWPC to -1 and *HIGHPC to 0. */
8160 get_scope_pc_bounds (struct die_info
*die
,
8161 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8162 struct dwarf2_cu
*cu
)
8164 CORE_ADDR best_low
= (CORE_ADDR
) -1;
8165 CORE_ADDR best_high
= (CORE_ADDR
) 0;
8166 CORE_ADDR current_low
, current_high
;
8168 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
8170 best_low
= current_low
;
8171 best_high
= current_high
;
8175 struct die_info
*child
= die
->child
;
8177 while (child
&& child
->tag
)
8179 switch (child
->tag
) {
8180 case DW_TAG_subprogram
:
8181 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
8183 case DW_TAG_namespace
:
8185 /* FIXME: carlton/2004-01-16: Should we do this for
8186 DW_TAG_class_type/DW_TAG_structure_type, too? I think
8187 that current GCC's always emit the DIEs corresponding
8188 to definitions of methods of classes as children of a
8189 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
8190 the DIEs giving the declarations, which could be
8191 anywhere). But I don't see any reason why the
8192 standards says that they have to be there. */
8193 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
8195 if (current_low
!= ((CORE_ADDR
) -1))
8197 best_low
= min (best_low
, current_low
);
8198 best_high
= max (best_high
, current_high
);
8206 child
= sibling_die (child
);
8211 *highpc
= best_high
;
8214 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
8218 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
8219 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
8221 struct objfile
*objfile
= cu
->objfile
;
8222 struct attribute
*attr
;
8223 struct attribute
*attr_high
;
8225 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
8228 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8231 CORE_ADDR low
= DW_ADDR (attr
);
8233 if (attr_high
->form
== DW_FORM_addr
8234 || attr_high
->form
== DW_FORM_GNU_addr_index
)
8235 high
= DW_ADDR (attr_high
);
8237 high
= low
+ DW_UNSND (attr_high
);
8239 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
8243 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
8246 bfd
*obfd
= objfile
->obfd
;
8248 /* The value of the DW_AT_ranges attribute is the offset of the
8249 address range list in the .debug_ranges section. */
8250 unsigned long offset
= DW_UNSND (attr
);
8251 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
8253 /* For some target architectures, but not others, the
8254 read_address function sign-extends the addresses it returns.
8255 To recognize base address selection entries, we need a
8257 unsigned int addr_size
= cu
->header
.addr_size
;
8258 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
8260 /* The base address, to which the next pair is relative. Note
8261 that this 'base' is a DWARF concept: most entries in a range
8262 list are relative, to reduce the number of relocs against the
8263 debugging information. This is separate from this function's
8264 'baseaddr' argument, which GDB uses to relocate debugging
8265 information from a shared library based on the address at
8266 which the library was loaded. */
8267 CORE_ADDR base
= cu
->base_address
;
8268 int base_known
= cu
->base_known
;
8270 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
8271 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
8273 complaint (&symfile_complaints
,
8274 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
8281 unsigned int bytes_read
;
8282 CORE_ADDR start
, end
;
8284 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
8285 buffer
+= bytes_read
;
8286 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
8287 buffer
+= bytes_read
;
8289 /* Did we find the end of the range list? */
8290 if (start
== 0 && end
== 0)
8293 /* Did we find a base address selection entry? */
8294 else if ((start
& base_select_mask
) == base_select_mask
)
8300 /* We found an ordinary address range. */
8305 complaint (&symfile_complaints
,
8306 _("Invalid .debug_ranges data "
8307 "(no base address)"));
8313 /* Inverted range entries are invalid. */
8314 complaint (&symfile_complaints
,
8315 _("Invalid .debug_ranges data "
8316 "(inverted range)"));
8320 /* Empty range entries have no effect. */
8324 record_block_range (block
,
8325 baseaddr
+ base
+ start
,
8326 baseaddr
+ base
+ end
- 1);
8332 /* Check whether the producer field indicates either of GCC < 4.6, or the
8333 Intel C/C++ compiler, and cache the result in CU. */
8336 check_producer (struct dwarf2_cu
*cu
)
8339 int major
, minor
, release
;
8341 if (cu
->producer
== NULL
)
8343 /* For unknown compilers expect their behavior is DWARF version
8346 GCC started to support .debug_types sections by -gdwarf-4 since
8347 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
8348 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
8349 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
8350 interpreted incorrectly by GDB now - GCC PR debug/48229. */
8352 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
8354 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
8356 cs
= &cu
->producer
[strlen ("GNU ")];
8357 while (*cs
&& !isdigit (*cs
))
8359 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
8361 /* Not recognized as GCC. */
8364 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
8366 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
8367 cu
->producer_is_icc
= 1;
8370 /* For other non-GCC compilers, expect their behavior is DWARF version
8374 cu
->checked_producer
= 1;
8377 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
8378 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
8379 during 4.6.0 experimental. */
8382 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
8384 if (!cu
->checked_producer
)
8385 check_producer (cu
);
8387 return cu
->producer_is_gxx_lt_4_6
;
8390 /* Return the default accessibility type if it is not overriden by
8391 DW_AT_accessibility. */
8393 static enum dwarf_access_attribute
8394 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
8396 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
8398 /* The default DWARF 2 accessibility for members is public, the default
8399 accessibility for inheritance is private. */
8401 if (die
->tag
!= DW_TAG_inheritance
)
8402 return DW_ACCESS_public
;
8404 return DW_ACCESS_private
;
8408 /* DWARF 3+ defines the default accessibility a different way. The same
8409 rules apply now for DW_TAG_inheritance as for the members and it only
8410 depends on the container kind. */
8412 if (die
->parent
->tag
== DW_TAG_class_type
)
8413 return DW_ACCESS_private
;
8415 return DW_ACCESS_public
;
8419 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
8420 offset. If the attribute was not found return 0, otherwise return
8421 1. If it was found but could not properly be handled, set *OFFSET
8425 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
8428 struct attribute
*attr
;
8430 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
8435 /* Note that we do not check for a section offset first here.
8436 This is because DW_AT_data_member_location is new in DWARF 4,
8437 so if we see it, we can assume that a constant form is really
8438 a constant and not a section offset. */
8439 if (attr_form_is_constant (attr
))
8440 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
8441 else if (attr_form_is_section_offset (attr
))
8442 dwarf2_complex_location_expr_complaint ();
8443 else if (attr_form_is_block (attr
))
8444 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
8446 dwarf2_complex_location_expr_complaint ();
8454 /* Add an aggregate field to the field list. */
8457 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
8458 struct dwarf2_cu
*cu
)
8460 struct objfile
*objfile
= cu
->objfile
;
8461 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8462 struct nextfield
*new_field
;
8463 struct attribute
*attr
;
8465 char *fieldname
= "";
8467 /* Allocate a new field list entry and link it in. */
8468 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
8469 make_cleanup (xfree
, new_field
);
8470 memset (new_field
, 0, sizeof (struct nextfield
));
8472 if (die
->tag
== DW_TAG_inheritance
)
8474 new_field
->next
= fip
->baseclasses
;
8475 fip
->baseclasses
= new_field
;
8479 new_field
->next
= fip
->fields
;
8480 fip
->fields
= new_field
;
8484 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
8486 new_field
->accessibility
= DW_UNSND (attr
);
8488 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
8489 if (new_field
->accessibility
!= DW_ACCESS_public
)
8490 fip
->non_public_fields
= 1;
8492 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
8494 new_field
->virtuality
= DW_UNSND (attr
);
8496 new_field
->virtuality
= DW_VIRTUALITY_none
;
8498 fp
= &new_field
->field
;
8500 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
8504 /* Data member other than a C++ static data member. */
8506 /* Get type of field. */
8507 fp
->type
= die_type (die
, cu
);
8509 SET_FIELD_BITPOS (*fp
, 0);
8511 /* Get bit size of field (zero if none). */
8512 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
8515 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
8519 FIELD_BITSIZE (*fp
) = 0;
8522 /* Get bit offset of field. */
8523 if (handle_data_member_location (die
, cu
, &offset
))
8524 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
8525 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
8528 if (gdbarch_bits_big_endian (gdbarch
))
8530 /* For big endian bits, the DW_AT_bit_offset gives the
8531 additional bit offset from the MSB of the containing
8532 anonymous object to the MSB of the field. We don't
8533 have to do anything special since we don't need to
8534 know the size of the anonymous object. */
8535 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
8539 /* For little endian bits, compute the bit offset to the
8540 MSB of the anonymous object, subtract off the number of
8541 bits from the MSB of the field to the MSB of the
8542 object, and then subtract off the number of bits of
8543 the field itself. The result is the bit offset of
8544 the LSB of the field. */
8546 int bit_offset
= DW_UNSND (attr
);
8548 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8551 /* The size of the anonymous object containing
8552 the bit field is explicit, so use the
8553 indicated size (in bytes). */
8554 anonymous_size
= DW_UNSND (attr
);
8558 /* The size of the anonymous object containing
8559 the bit field must be inferred from the type
8560 attribute of the data member containing the
8562 anonymous_size
= TYPE_LENGTH (fp
->type
);
8564 SET_FIELD_BITPOS (*fp
,
8566 + anonymous_size
* bits_per_byte
8567 - bit_offset
- FIELD_BITSIZE (*fp
)));
8571 /* Get name of field. */
8572 fieldname
= dwarf2_name (die
, cu
);
8573 if (fieldname
== NULL
)
8576 /* The name is already allocated along with this objfile, so we don't
8577 need to duplicate it for the type. */
8578 fp
->name
= fieldname
;
8580 /* Change accessibility for artificial fields (e.g. virtual table
8581 pointer or virtual base class pointer) to private. */
8582 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
8584 FIELD_ARTIFICIAL (*fp
) = 1;
8585 new_field
->accessibility
= DW_ACCESS_private
;
8586 fip
->non_public_fields
= 1;
8589 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
8591 /* C++ static member. */
8593 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
8594 is a declaration, but all versions of G++ as of this writing
8595 (so through at least 3.2.1) incorrectly generate
8596 DW_TAG_variable tags. */
8598 const char *physname
;
8600 /* Get name of field. */
8601 fieldname
= dwarf2_name (die
, cu
);
8602 if (fieldname
== NULL
)
8605 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8607 /* Only create a symbol if this is an external value.
8608 new_symbol checks this and puts the value in the global symbol
8609 table, which we want. If it is not external, new_symbol
8610 will try to put the value in cu->list_in_scope which is wrong. */
8611 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
8613 /* A static const member, not much different than an enum as far as
8614 we're concerned, except that we can support more types. */
8615 new_symbol (die
, NULL
, cu
);
8618 /* Get physical name. */
8619 physname
= dwarf2_physname (fieldname
, die
, cu
);
8621 /* The name is already allocated along with this objfile, so we don't
8622 need to duplicate it for the type. */
8623 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
8624 FIELD_TYPE (*fp
) = die_type (die
, cu
);
8625 FIELD_NAME (*fp
) = fieldname
;
8627 else if (die
->tag
== DW_TAG_inheritance
)
8631 /* C++ base class field. */
8632 if (handle_data_member_location (die
, cu
, &offset
))
8633 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
8634 FIELD_BITSIZE (*fp
) = 0;
8635 FIELD_TYPE (*fp
) = die_type (die
, cu
);
8636 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
8637 fip
->nbaseclasses
++;
8641 /* Add a typedef defined in the scope of the FIP's class. */
8644 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
8645 struct dwarf2_cu
*cu
)
8647 struct objfile
*objfile
= cu
->objfile
;
8648 struct typedef_field_list
*new_field
;
8649 struct attribute
*attr
;
8650 struct typedef_field
*fp
;
8651 char *fieldname
= "";
8653 /* Allocate a new field list entry and link it in. */
8654 new_field
= xzalloc (sizeof (*new_field
));
8655 make_cleanup (xfree
, new_field
);
8657 gdb_assert (die
->tag
== DW_TAG_typedef
);
8659 fp
= &new_field
->field
;
8661 /* Get name of field. */
8662 fp
->name
= dwarf2_name (die
, cu
);
8663 if (fp
->name
== NULL
)
8666 fp
->type
= read_type_die (die
, cu
);
8668 new_field
->next
= fip
->typedef_field_list
;
8669 fip
->typedef_field_list
= new_field
;
8670 fip
->typedef_field_list_count
++;
8673 /* Create the vector of fields, and attach it to the type. */
8676 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
8677 struct dwarf2_cu
*cu
)
8679 int nfields
= fip
->nfields
;
8681 /* Record the field count, allocate space for the array of fields,
8682 and create blank accessibility bitfields if necessary. */
8683 TYPE_NFIELDS (type
) = nfields
;
8684 TYPE_FIELDS (type
) = (struct field
*)
8685 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
8686 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
8688 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
8690 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8692 TYPE_FIELD_PRIVATE_BITS (type
) =
8693 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8694 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
8696 TYPE_FIELD_PROTECTED_BITS (type
) =
8697 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8698 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
8700 TYPE_FIELD_IGNORE_BITS (type
) =
8701 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
8702 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
8705 /* If the type has baseclasses, allocate and clear a bit vector for
8706 TYPE_FIELD_VIRTUAL_BITS. */
8707 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
8709 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
8710 unsigned char *pointer
;
8712 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8713 pointer
= TYPE_ALLOC (type
, num_bytes
);
8714 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
8715 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
8716 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
8719 /* Copy the saved-up fields into the field vector. Start from the head of
8720 the list, adding to the tail of the field array, so that they end up in
8721 the same order in the array in which they were added to the list. */
8722 while (nfields
-- > 0)
8724 struct nextfield
*fieldp
;
8728 fieldp
= fip
->fields
;
8729 fip
->fields
= fieldp
->next
;
8733 fieldp
= fip
->baseclasses
;
8734 fip
->baseclasses
= fieldp
->next
;
8737 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
8738 switch (fieldp
->accessibility
)
8740 case DW_ACCESS_private
:
8741 if (cu
->language
!= language_ada
)
8742 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
8745 case DW_ACCESS_protected
:
8746 if (cu
->language
!= language_ada
)
8747 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
8750 case DW_ACCESS_public
:
8754 /* Unknown accessibility. Complain and treat it as public. */
8756 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
8757 fieldp
->accessibility
);
8761 if (nfields
< fip
->nbaseclasses
)
8763 switch (fieldp
->virtuality
)
8765 case DW_VIRTUALITY_virtual
:
8766 case DW_VIRTUALITY_pure_virtual
:
8767 if (cu
->language
== language_ada
)
8768 error (_("unexpected virtuality in component of Ada type"));
8769 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
8776 /* Add a member function to the proper fieldlist. */
8779 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
8780 struct type
*type
, struct dwarf2_cu
*cu
)
8782 struct objfile
*objfile
= cu
->objfile
;
8783 struct attribute
*attr
;
8784 struct fnfieldlist
*flp
;
8786 struct fn_field
*fnp
;
8788 struct nextfnfield
*new_fnfield
;
8789 struct type
*this_type
;
8790 enum dwarf_access_attribute accessibility
;
8792 if (cu
->language
== language_ada
)
8793 error (_("unexpected member function in Ada type"));
8795 /* Get name of member function. */
8796 fieldname
= dwarf2_name (die
, cu
);
8797 if (fieldname
== NULL
)
8800 /* Look up member function name in fieldlist. */
8801 for (i
= 0; i
< fip
->nfnfields
; i
++)
8803 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
8807 /* Create new list element if necessary. */
8808 if (i
< fip
->nfnfields
)
8809 flp
= &fip
->fnfieldlists
[i
];
8812 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
8814 fip
->fnfieldlists
= (struct fnfieldlist
*)
8815 xrealloc (fip
->fnfieldlists
,
8816 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
8817 * sizeof (struct fnfieldlist
));
8818 if (fip
->nfnfields
== 0)
8819 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
8821 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
8822 flp
->name
= fieldname
;
8825 i
= fip
->nfnfields
++;
8828 /* Create a new member function field and chain it to the field list
8830 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
8831 make_cleanup (xfree
, new_fnfield
);
8832 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
8833 new_fnfield
->next
= flp
->head
;
8834 flp
->head
= new_fnfield
;
8837 /* Fill in the member function field info. */
8838 fnp
= &new_fnfield
->fnfield
;
8840 /* Delay processing of the physname until later. */
8841 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
8843 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
8848 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
8849 fnp
->physname
= physname
? physname
: "";
8852 fnp
->type
= alloc_type (objfile
);
8853 this_type
= read_type_die (die
, cu
);
8854 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
8856 int nparams
= TYPE_NFIELDS (this_type
);
8858 /* TYPE is the domain of this method, and THIS_TYPE is the type
8859 of the method itself (TYPE_CODE_METHOD). */
8860 smash_to_method_type (fnp
->type
, type
,
8861 TYPE_TARGET_TYPE (this_type
),
8862 TYPE_FIELDS (this_type
),
8863 TYPE_NFIELDS (this_type
),
8864 TYPE_VARARGS (this_type
));
8866 /* Handle static member functions.
8867 Dwarf2 has no clean way to discern C++ static and non-static
8868 member functions. G++ helps GDB by marking the first
8869 parameter for non-static member functions (which is the this
8870 pointer) as artificial. We obtain this information from
8871 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
8872 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
8873 fnp
->voffset
= VOFFSET_STATIC
;
8876 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
8877 dwarf2_full_name (fieldname
, die
, cu
));
8879 /* Get fcontext from DW_AT_containing_type if present. */
8880 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
8881 fnp
->fcontext
= die_containing_type (die
, cu
);
8883 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
8884 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
8886 /* Get accessibility. */
8887 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
8889 accessibility
= DW_UNSND (attr
);
8891 accessibility
= dwarf2_default_access_attribute (die
, cu
);
8892 switch (accessibility
)
8894 case DW_ACCESS_private
:
8895 fnp
->is_private
= 1;
8897 case DW_ACCESS_protected
:
8898 fnp
->is_protected
= 1;
8902 /* Check for artificial methods. */
8903 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
8904 if (attr
&& DW_UNSND (attr
) != 0)
8905 fnp
->is_artificial
= 1;
8907 /* Get index in virtual function table if it is a virtual member
8908 function. For older versions of GCC, this is an offset in the
8909 appropriate virtual table, as specified by DW_AT_containing_type.
8910 For everyone else, it is an expression to be evaluated relative
8911 to the object address. */
8913 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
8916 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
8918 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
8920 /* Old-style GCC. */
8921 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
8923 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
8924 || (DW_BLOCK (attr
)->size
> 1
8925 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
8926 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
8928 struct dwarf_block blk
;
8931 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
8933 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
8934 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
8935 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
8936 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
8937 dwarf2_complex_location_expr_complaint ();
8939 fnp
->voffset
/= cu
->header
.addr_size
;
8943 dwarf2_complex_location_expr_complaint ();
8946 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
8948 else if (attr_form_is_section_offset (attr
))
8950 dwarf2_complex_location_expr_complaint ();
8954 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
8960 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
8961 if (attr
&& DW_UNSND (attr
))
8963 /* GCC does this, as of 2008-08-25; PR debug/37237. */
8964 complaint (&symfile_complaints
,
8965 _("Member function \"%s\" (offset %d) is virtual "
8966 "but the vtable offset is not specified"),
8967 fieldname
, die
->offset
.sect_off
);
8968 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8969 TYPE_CPLUS_DYNAMIC (type
) = 1;
8974 /* Create the vector of member function fields, and attach it to the type. */
8977 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
8978 struct dwarf2_cu
*cu
)
8980 struct fnfieldlist
*flp
;
8983 if (cu
->language
== language_ada
)
8984 error (_("unexpected member functions in Ada type"));
8986 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
8987 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
8988 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
8990 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
8992 struct nextfnfield
*nfp
= flp
->head
;
8993 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
8996 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
8997 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
8998 fn_flp
->fn_fields
= (struct fn_field
*)
8999 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
9000 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
9001 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
9004 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
9007 /* Returns non-zero if NAME is the name of a vtable member in CU's
9008 language, zero otherwise. */
9010 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
9012 static const char vptr
[] = "_vptr";
9013 static const char vtable
[] = "vtable";
9015 /* Look for the C++ and Java forms of the vtable. */
9016 if ((cu
->language
== language_java
9017 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
9018 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
9019 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
9025 /* GCC outputs unnamed structures that are really pointers to member
9026 functions, with the ABI-specified layout. If TYPE describes
9027 such a structure, smash it into a member function type.
9029 GCC shouldn't do this; it should just output pointer to member DIEs.
9030 This is GCC PR debug/28767. */
9033 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
9035 struct type
*pfn_type
, *domain_type
, *new_type
;
9037 /* Check for a structure with no name and two children. */
9038 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
9041 /* Check for __pfn and __delta members. */
9042 if (TYPE_FIELD_NAME (type
, 0) == NULL
9043 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
9044 || TYPE_FIELD_NAME (type
, 1) == NULL
9045 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
9048 /* Find the type of the method. */
9049 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
9050 if (pfn_type
== NULL
9051 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
9052 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
9055 /* Look for the "this" argument. */
9056 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
9057 if (TYPE_NFIELDS (pfn_type
) == 0
9058 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
9059 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
9062 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
9063 new_type
= alloc_type (objfile
);
9064 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
9065 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
9066 TYPE_VARARGS (pfn_type
));
9067 smash_to_methodptr_type (type
, new_type
);
9070 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
9074 producer_is_icc (struct dwarf2_cu
*cu
)
9076 if (!cu
->checked_producer
)
9077 check_producer (cu
);
9079 return cu
->producer_is_icc
;
9082 /* Called when we find the DIE that starts a structure or union scope
9083 (definition) to create a type for the structure or union. Fill in
9084 the type's name and general properties; the members will not be
9085 processed until process_structure_type.
9087 NOTE: we need to call these functions regardless of whether or not the
9088 DIE has a DW_AT_name attribute, since it might be an anonymous
9089 structure or union. This gets the type entered into our set of
9092 However, if the structure is incomplete (an opaque struct/union)
9093 then suppress creating a symbol table entry for it since gdb only
9094 wants to find the one with the complete definition. Note that if
9095 it is complete, we just call new_symbol, which does it's own
9096 checking about whether the struct/union is anonymous or not (and
9097 suppresses creating a symbol table entry itself). */
9099 static struct type
*
9100 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9102 struct objfile
*objfile
= cu
->objfile
;
9104 struct attribute
*attr
;
9107 /* If the definition of this type lives in .debug_types, read that type.
9108 Don't follow DW_AT_specification though, that will take us back up
9109 the chain and we want to go down. */
9110 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
9113 struct dwarf2_cu
*type_cu
= cu
;
9114 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
9116 /* We could just recurse on read_structure_type, but we need to call
9117 get_die_type to ensure only one type for this DIE is created.
9118 This is important, for example, because for c++ classes we need
9119 TYPE_NAME set which is only done by new_symbol. Blech. */
9120 type
= read_type_die (type_die
, type_cu
);
9122 /* TYPE_CU may not be the same as CU.
9123 Ensure TYPE is recorded in CU's type_hash table. */
9124 return set_die_type (die
, type
, cu
);
9127 type
= alloc_type (objfile
);
9128 INIT_CPLUS_SPECIFIC (type
);
9130 name
= dwarf2_name (die
, cu
);
9133 if (cu
->language
== language_cplus
9134 || cu
->language
== language_java
)
9136 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
9138 /* dwarf2_full_name might have already finished building the DIE's
9139 type. If so, there is no need to continue. */
9140 if (get_die_type (die
, cu
) != NULL
)
9141 return get_die_type (die
, cu
);
9143 TYPE_TAG_NAME (type
) = full_name
;
9144 if (die
->tag
== DW_TAG_structure_type
9145 || die
->tag
== DW_TAG_class_type
)
9146 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
9150 /* The name is already allocated along with this objfile, so
9151 we don't need to duplicate it for the type. */
9152 TYPE_TAG_NAME (type
) = (char *) name
;
9153 if (die
->tag
== DW_TAG_class_type
)
9154 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
9158 if (die
->tag
== DW_TAG_structure_type
)
9160 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9162 else if (die
->tag
== DW_TAG_union_type
)
9164 TYPE_CODE (type
) = TYPE_CODE_UNION
;
9168 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
9171 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
9172 TYPE_DECLARED_CLASS (type
) = 1;
9174 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9177 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9181 TYPE_LENGTH (type
) = 0;
9184 if (producer_is_icc (cu
))
9186 /* ICC does not output the required DW_AT_declaration
9187 on incomplete types, but gives them a size of zero. */
9190 TYPE_STUB_SUPPORTED (type
) = 1;
9192 if (die_is_declaration (die
, cu
))
9193 TYPE_STUB (type
) = 1;
9194 else if (attr
== NULL
&& die
->child
== NULL
9195 && producer_is_realview (cu
->producer
))
9196 /* RealView does not output the required DW_AT_declaration
9197 on incomplete types. */
9198 TYPE_STUB (type
) = 1;
9200 /* We need to add the type field to the die immediately so we don't
9201 infinitely recurse when dealing with pointers to the structure
9202 type within the structure itself. */
9203 set_die_type (die
, type
, cu
);
9205 /* set_die_type should be already done. */
9206 set_descriptive_type (type
, die
, cu
);
9211 /* Finish creating a structure or union type, including filling in
9212 its members and creating a symbol for it. */
9215 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9217 struct objfile
*objfile
= cu
->objfile
;
9218 struct die_info
*child_die
= die
->child
;
9221 type
= get_die_type (die
, cu
);
9223 type
= read_structure_type (die
, cu
);
9225 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
9227 struct field_info fi
;
9228 struct die_info
*child_die
;
9229 VEC (symbolp
) *template_args
= NULL
;
9230 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9232 memset (&fi
, 0, sizeof (struct field_info
));
9234 child_die
= die
->child
;
9236 while (child_die
&& child_die
->tag
)
9238 if (child_die
->tag
== DW_TAG_member
9239 || child_die
->tag
== DW_TAG_variable
)
9241 /* NOTE: carlton/2002-11-05: A C++ static data member
9242 should be a DW_TAG_member that is a declaration, but
9243 all versions of G++ as of this writing (so through at
9244 least 3.2.1) incorrectly generate DW_TAG_variable
9245 tags for them instead. */
9246 dwarf2_add_field (&fi
, child_die
, cu
);
9248 else if (child_die
->tag
== DW_TAG_subprogram
)
9250 /* C++ member function. */
9251 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
9253 else if (child_die
->tag
== DW_TAG_inheritance
)
9255 /* C++ base class field. */
9256 dwarf2_add_field (&fi
, child_die
, cu
);
9258 else if (child_die
->tag
== DW_TAG_typedef
)
9259 dwarf2_add_typedef (&fi
, child_die
, cu
);
9260 else if (child_die
->tag
== DW_TAG_template_type_param
9261 || child_die
->tag
== DW_TAG_template_value_param
)
9263 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
9266 VEC_safe_push (symbolp
, template_args
, arg
);
9269 child_die
= sibling_die (child_die
);
9272 /* Attach template arguments to type. */
9273 if (! VEC_empty (symbolp
, template_args
))
9275 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9276 TYPE_N_TEMPLATE_ARGUMENTS (type
)
9277 = VEC_length (symbolp
, template_args
);
9278 TYPE_TEMPLATE_ARGUMENTS (type
)
9279 = obstack_alloc (&objfile
->objfile_obstack
,
9280 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
9281 * sizeof (struct symbol
*)));
9282 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
9283 VEC_address (symbolp
, template_args
),
9284 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
9285 * sizeof (struct symbol
*)));
9286 VEC_free (symbolp
, template_args
);
9289 /* Attach fields and member functions to the type. */
9291 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
9294 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
9296 /* Get the type which refers to the base class (possibly this
9297 class itself) which contains the vtable pointer for the current
9298 class from the DW_AT_containing_type attribute. This use of
9299 DW_AT_containing_type is a GNU extension. */
9301 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
9303 struct type
*t
= die_containing_type (die
, cu
);
9305 TYPE_VPTR_BASETYPE (type
) = t
;
9310 /* Our own class provides vtbl ptr. */
9311 for (i
= TYPE_NFIELDS (t
) - 1;
9312 i
>= TYPE_N_BASECLASSES (t
);
9315 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
9317 if (is_vtable_name (fieldname
, cu
))
9319 TYPE_VPTR_FIELDNO (type
) = i
;
9324 /* Complain if virtual function table field not found. */
9325 if (i
< TYPE_N_BASECLASSES (t
))
9326 complaint (&symfile_complaints
,
9327 _("virtual function table pointer "
9328 "not found when defining class '%s'"),
9329 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
9334 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
9337 else if (cu
->producer
9338 && strncmp (cu
->producer
,
9339 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
9341 /* The IBM XLC compiler does not provide direct indication
9342 of the containing type, but the vtable pointer is
9343 always named __vfp. */
9347 for (i
= TYPE_NFIELDS (type
) - 1;
9348 i
>= TYPE_N_BASECLASSES (type
);
9351 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
9353 TYPE_VPTR_FIELDNO (type
) = i
;
9354 TYPE_VPTR_BASETYPE (type
) = type
;
9361 /* Copy fi.typedef_field_list linked list elements content into the
9362 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
9363 if (fi
.typedef_field_list
)
9365 int i
= fi
.typedef_field_list_count
;
9367 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9368 TYPE_TYPEDEF_FIELD_ARRAY (type
)
9369 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
9370 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
9372 /* Reverse the list order to keep the debug info elements order. */
9375 struct typedef_field
*dest
, *src
;
9377 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
9378 src
= &fi
.typedef_field_list
->field
;
9379 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
9384 do_cleanups (back_to
);
9386 if (HAVE_CPLUS_STRUCT (type
))
9387 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
9390 quirk_gcc_member_function_pointer (type
, objfile
);
9392 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
9393 snapshots) has been known to create a die giving a declaration
9394 for a class that has, as a child, a die giving a definition for a
9395 nested class. So we have to process our children even if the
9396 current die is a declaration. Normally, of course, a declaration
9397 won't have any children at all. */
9399 while (child_die
!= NULL
&& child_die
->tag
)
9401 if (child_die
->tag
== DW_TAG_member
9402 || child_die
->tag
== DW_TAG_variable
9403 || child_die
->tag
== DW_TAG_inheritance
9404 || child_die
->tag
== DW_TAG_template_value_param
9405 || child_die
->tag
== DW_TAG_template_type_param
)
9410 process_die (child_die
, cu
);
9412 child_die
= sibling_die (child_die
);
9415 /* Do not consider external references. According to the DWARF standard,
9416 these DIEs are identified by the fact that they have no byte_size
9417 attribute, and a declaration attribute. */
9418 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
9419 || !die_is_declaration (die
, cu
))
9420 new_symbol (die
, type
, cu
);
9423 /* Given a DW_AT_enumeration_type die, set its type. We do not
9424 complete the type's fields yet, or create any symbols. */
9426 static struct type
*
9427 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9429 struct objfile
*objfile
= cu
->objfile
;
9431 struct attribute
*attr
;
9434 /* If the definition of this type lives in .debug_types, read that type.
9435 Don't follow DW_AT_specification though, that will take us back up
9436 the chain and we want to go down. */
9437 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
9440 struct dwarf2_cu
*type_cu
= cu
;
9441 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
9443 type
= read_type_die (type_die
, type_cu
);
9445 /* TYPE_CU may not be the same as CU.
9446 Ensure TYPE is recorded in CU's type_hash table. */
9447 return set_die_type (die
, type
, cu
);
9450 type
= alloc_type (objfile
);
9452 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
9453 name
= dwarf2_full_name (NULL
, die
, cu
);
9455 TYPE_TAG_NAME (type
) = (char *) name
;
9457 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9460 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9464 TYPE_LENGTH (type
) = 0;
9467 /* The enumeration DIE can be incomplete. In Ada, any type can be
9468 declared as private in the package spec, and then defined only
9469 inside the package body. Such types are known as Taft Amendment
9470 Types. When another package uses such a type, an incomplete DIE
9471 may be generated by the compiler. */
9472 if (die_is_declaration (die
, cu
))
9473 TYPE_STUB (type
) = 1;
9475 return set_die_type (die
, type
, cu
);
9478 /* Given a pointer to a die which begins an enumeration, process all
9479 the dies that define the members of the enumeration, and create the
9480 symbol for the enumeration type.
9482 NOTE: We reverse the order of the element list. */
9485 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9487 struct type
*this_type
;
9489 this_type
= get_die_type (die
, cu
);
9490 if (this_type
== NULL
)
9491 this_type
= read_enumeration_type (die
, cu
);
9493 if (die
->child
!= NULL
)
9495 struct die_info
*child_die
;
9497 struct field
*fields
= NULL
;
9499 int unsigned_enum
= 1;
9504 child_die
= die
->child
;
9505 while (child_die
&& child_die
->tag
)
9507 if (child_die
->tag
!= DW_TAG_enumerator
)
9509 process_die (child_die
, cu
);
9513 name
= dwarf2_name (child_die
, cu
);
9516 sym
= new_symbol (child_die
, this_type
, cu
);
9517 if (SYMBOL_VALUE (sym
) < 0)
9522 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
9525 mask
|= SYMBOL_VALUE (sym
);
9527 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
9529 fields
= (struct field
*)
9531 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
9532 * sizeof (struct field
));
9535 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
9536 FIELD_TYPE (fields
[num_fields
]) = NULL
;
9537 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
9538 FIELD_BITSIZE (fields
[num_fields
]) = 0;
9544 child_die
= sibling_die (child_die
);
9549 TYPE_NFIELDS (this_type
) = num_fields
;
9550 TYPE_FIELDS (this_type
) = (struct field
*)
9551 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
9552 memcpy (TYPE_FIELDS (this_type
), fields
,
9553 sizeof (struct field
) * num_fields
);
9557 TYPE_UNSIGNED (this_type
) = 1;
9559 TYPE_FLAG_ENUM (this_type
) = 1;
9562 /* If we are reading an enum from a .debug_types unit, and the enum
9563 is a declaration, and the enum is not the signatured type in the
9564 unit, then we do not want to add a symbol for it. Adding a
9565 symbol would in some cases obscure the true definition of the
9566 enum, giving users an incomplete type when the definition is
9567 actually available. Note that we do not want to do this for all
9568 enums which are just declarations, because C++0x allows forward
9569 enum declarations. */
9570 if (cu
->per_cu
->is_debug_types
9571 && die_is_declaration (die
, cu
))
9573 struct signatured_type
*sig_type
;
9576 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
9577 cu
->per_cu
->info_or_types_section
,
9578 cu
->per_cu
->offset
);
9579 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
9580 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
9584 new_symbol (die
, this_type
, cu
);
9587 /* Extract all information from a DW_TAG_array_type DIE and put it in
9588 the DIE's type field. For now, this only handles one dimensional
9591 static struct type
*
9592 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9594 struct objfile
*objfile
= cu
->objfile
;
9595 struct die_info
*child_die
;
9597 struct type
*element_type
, *range_type
, *index_type
;
9598 struct type
**range_types
= NULL
;
9599 struct attribute
*attr
;
9601 struct cleanup
*back_to
;
9604 element_type
= die_type (die
, cu
);
9606 /* The die_type call above may have already set the type for this DIE. */
9607 type
= get_die_type (die
, cu
);
9611 /* Irix 6.2 native cc creates array types without children for
9612 arrays with unspecified length. */
9613 if (die
->child
== NULL
)
9615 index_type
= objfile_type (objfile
)->builtin_int
;
9616 range_type
= create_range_type (NULL
, index_type
, 0, -1);
9617 type
= create_array_type (NULL
, element_type
, range_type
);
9618 return set_die_type (die
, type
, cu
);
9621 back_to
= make_cleanup (null_cleanup
, NULL
);
9622 child_die
= die
->child
;
9623 while (child_die
&& child_die
->tag
)
9625 if (child_die
->tag
== DW_TAG_subrange_type
)
9627 struct type
*child_type
= read_type_die (child_die
, cu
);
9629 if (child_type
!= NULL
)
9631 /* The range type was succesfully read. Save it for the
9632 array type creation. */
9633 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
9635 range_types
= (struct type
**)
9636 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
9637 * sizeof (struct type
*));
9639 make_cleanup (free_current_contents
, &range_types
);
9641 range_types
[ndim
++] = child_type
;
9644 child_die
= sibling_die (child_die
);
9647 /* Dwarf2 dimensions are output from left to right, create the
9648 necessary array types in backwards order. */
9650 type
= element_type
;
9652 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
9657 type
= create_array_type (NULL
, type
, range_types
[i
++]);
9662 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
9665 /* Understand Dwarf2 support for vector types (like they occur on
9666 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
9667 array type. This is not part of the Dwarf2/3 standard yet, but a
9668 custom vendor extension. The main difference between a regular
9669 array and the vector variant is that vectors are passed by value
9671 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
9673 make_vector_type (type
);
9675 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
9676 implementation may choose to implement triple vectors using this
9678 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9681 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
9682 TYPE_LENGTH (type
) = DW_UNSND (attr
);
9684 complaint (&symfile_complaints
,
9685 _("DW_AT_byte_size for array type smaller "
9686 "than the total size of elements"));
9689 name
= dwarf2_name (die
, cu
);
9691 TYPE_NAME (type
) = name
;
9693 /* Install the type in the die. */
9694 set_die_type (die
, type
, cu
);
9696 /* set_die_type should be already done. */
9697 set_descriptive_type (type
, die
, cu
);
9699 do_cleanups (back_to
);
9704 static enum dwarf_array_dim_ordering
9705 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
9707 struct attribute
*attr
;
9709 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
9711 if (attr
) return DW_SND (attr
);
9713 /* GNU F77 is a special case, as at 08/2004 array type info is the
9714 opposite order to the dwarf2 specification, but data is still
9715 laid out as per normal fortran.
9717 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
9718 version checking. */
9720 if (cu
->language
== language_fortran
9721 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
9723 return DW_ORD_row_major
;
9726 switch (cu
->language_defn
->la_array_ordering
)
9728 case array_column_major
:
9729 return DW_ORD_col_major
;
9730 case array_row_major
:
9732 return DW_ORD_row_major
;
9736 /* Extract all information from a DW_TAG_set_type DIE and put it in
9737 the DIE's type field. */
9739 static struct type
*
9740 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9742 struct type
*domain_type
, *set_type
;
9743 struct attribute
*attr
;
9745 domain_type
= die_type (die
, cu
);
9747 /* The die_type call above may have already set the type for this DIE. */
9748 set_type
= get_die_type (die
, cu
);
9752 set_type
= create_set_type (NULL
, domain_type
);
9754 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9756 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
9758 return set_die_type (die
, set_type
, cu
);
9761 /* First cut: install each common block member as a global variable. */
9764 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
9766 struct die_info
*child_die
;
9767 struct attribute
*attr
;
9769 CORE_ADDR base
= (CORE_ADDR
) 0;
9771 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
9774 /* Support the .debug_loc offsets. */
9775 if (attr_form_is_block (attr
))
9777 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
9779 else if (attr_form_is_section_offset (attr
))
9781 dwarf2_complex_location_expr_complaint ();
9785 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9786 "common block member");
9789 if (die
->child
!= NULL
)
9791 child_die
= die
->child
;
9792 while (child_die
&& child_die
->tag
)
9796 sym
= new_symbol (child_die
, NULL
, cu
);
9798 && handle_data_member_location (child_die
, cu
, &offset
))
9800 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
9801 add_symbol_to_list (sym
, &global_symbols
);
9803 child_die
= sibling_die (child_die
);
9808 /* Create a type for a C++ namespace. */
9810 static struct type
*
9811 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9813 struct objfile
*objfile
= cu
->objfile
;
9814 const char *previous_prefix
, *name
;
9818 /* For extensions, reuse the type of the original namespace. */
9819 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
9821 struct die_info
*ext_die
;
9822 struct dwarf2_cu
*ext_cu
= cu
;
9824 ext_die
= dwarf2_extension (die
, &ext_cu
);
9825 type
= read_type_die (ext_die
, ext_cu
);
9827 /* EXT_CU may not be the same as CU.
9828 Ensure TYPE is recorded in CU's type_hash table. */
9829 return set_die_type (die
, type
, cu
);
9832 name
= namespace_name (die
, &is_anonymous
, cu
);
9834 /* Now build the name of the current namespace. */
9836 previous_prefix
= determine_prefix (die
, cu
);
9837 if (previous_prefix
[0] != '\0')
9838 name
= typename_concat (&objfile
->objfile_obstack
,
9839 previous_prefix
, name
, 0, cu
);
9841 /* Create the type. */
9842 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
9844 TYPE_NAME (type
) = (char *) name
;
9845 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9847 return set_die_type (die
, type
, cu
);
9850 /* Read a C++ namespace. */
9853 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
9855 struct objfile
*objfile
= cu
->objfile
;
9858 /* Add a symbol associated to this if we haven't seen the namespace
9859 before. Also, add a using directive if it's an anonymous
9862 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
9866 type
= read_type_die (die
, cu
);
9867 new_symbol (die
, type
, cu
);
9869 namespace_name (die
, &is_anonymous
, cu
);
9872 const char *previous_prefix
= determine_prefix (die
, cu
);
9874 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
9875 NULL
, NULL
, &objfile
->objfile_obstack
);
9879 if (die
->child
!= NULL
)
9881 struct die_info
*child_die
= die
->child
;
9883 while (child_die
&& child_die
->tag
)
9885 process_die (child_die
, cu
);
9886 child_die
= sibling_die (child_die
);
9891 /* Read a Fortran module as type. This DIE can be only a declaration used for
9892 imported module. Still we need that type as local Fortran "use ... only"
9893 declaration imports depend on the created type in determine_prefix. */
9895 static struct type
*
9896 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9898 struct objfile
*objfile
= cu
->objfile
;
9902 module_name
= dwarf2_name (die
, cu
);
9904 complaint (&symfile_complaints
,
9905 _("DW_TAG_module has no name, offset 0x%x"),
9906 die
->offset
.sect_off
);
9907 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
9909 /* determine_prefix uses TYPE_TAG_NAME. */
9910 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9912 return set_die_type (die
, type
, cu
);
9915 /* Read a Fortran module. */
9918 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
9920 struct die_info
*child_die
= die
->child
;
9922 while (child_die
&& child_die
->tag
)
9924 process_die (child_die
, cu
);
9925 child_die
= sibling_die (child_die
);
9929 /* Return the name of the namespace represented by DIE. Set
9930 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
9934 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
9936 struct die_info
*current_die
;
9937 const char *name
= NULL
;
9939 /* Loop through the extensions until we find a name. */
9941 for (current_die
= die
;
9942 current_die
!= NULL
;
9943 current_die
= dwarf2_extension (die
, &cu
))
9945 name
= dwarf2_name (current_die
, cu
);
9950 /* Is it an anonymous namespace? */
9952 *is_anonymous
= (name
== NULL
);
9954 name
= CP_ANONYMOUS_NAMESPACE_STR
;
9959 /* Extract all information from a DW_TAG_pointer_type DIE and add to
9960 the user defined type vector. */
9962 static struct type
*
9963 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9965 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
9966 struct comp_unit_head
*cu_header
= &cu
->header
;
9968 struct attribute
*attr_byte_size
;
9969 struct attribute
*attr_address_class
;
9970 int byte_size
, addr_class
;
9971 struct type
*target_type
;
9973 target_type
= die_type (die
, cu
);
9975 /* The die_type call above may have already set the type for this DIE. */
9976 type
= get_die_type (die
, cu
);
9980 type
= lookup_pointer_type (target_type
);
9982 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9984 byte_size
= DW_UNSND (attr_byte_size
);
9986 byte_size
= cu_header
->addr_size
;
9988 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
9989 if (attr_address_class
)
9990 addr_class
= DW_UNSND (attr_address_class
);
9992 addr_class
= DW_ADDR_none
;
9994 /* If the pointer size or address class is different than the
9995 default, create a type variant marked as such and set the
9996 length accordingly. */
9997 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
9999 if (gdbarch_address_class_type_flags_p (gdbarch
))
10003 type_flags
= gdbarch_address_class_type_flags
10004 (gdbarch
, byte_size
, addr_class
);
10005 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
10007 type
= make_type_with_address_space (type
, type_flags
);
10009 else if (TYPE_LENGTH (type
) != byte_size
)
10011 complaint (&symfile_complaints
,
10012 _("invalid pointer size %d"), byte_size
);
10016 /* Should we also complain about unhandled address classes? */
10020 TYPE_LENGTH (type
) = byte_size
;
10021 return set_die_type (die
, type
, cu
);
10024 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
10025 the user defined type vector. */
10027 static struct type
*
10028 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10031 struct type
*to_type
;
10032 struct type
*domain
;
10034 to_type
= die_type (die
, cu
);
10035 domain
= die_containing_type (die
, cu
);
10037 /* The calls above may have already set the type for this DIE. */
10038 type
= get_die_type (die
, cu
);
10042 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
10043 type
= lookup_methodptr_type (to_type
);
10045 type
= lookup_memberptr_type (to_type
, domain
);
10047 return set_die_type (die
, type
, cu
);
10050 /* Extract all information from a DW_TAG_reference_type DIE and add to
10051 the user defined type vector. */
10053 static struct type
*
10054 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10056 struct comp_unit_head
*cu_header
= &cu
->header
;
10057 struct type
*type
, *target_type
;
10058 struct attribute
*attr
;
10060 target_type
= die_type (die
, cu
);
10062 /* The die_type call above may have already set the type for this DIE. */
10063 type
= get_die_type (die
, cu
);
10067 type
= lookup_reference_type (target_type
);
10068 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10071 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10075 TYPE_LENGTH (type
) = cu_header
->addr_size
;
10077 return set_die_type (die
, type
, cu
);
10080 static struct type
*
10081 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10083 struct type
*base_type
, *cv_type
;
10085 base_type
= die_type (die
, cu
);
10087 /* The die_type call above may have already set the type for this DIE. */
10088 cv_type
= get_die_type (die
, cu
);
10092 /* In case the const qualifier is applied to an array type, the element type
10093 is so qualified, not the array type (section 6.7.3 of C99). */
10094 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
10096 struct type
*el_type
, *inner_array
;
10098 base_type
= copy_type (base_type
);
10099 inner_array
= base_type
;
10101 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
10103 TYPE_TARGET_TYPE (inner_array
) =
10104 copy_type (TYPE_TARGET_TYPE (inner_array
));
10105 inner_array
= TYPE_TARGET_TYPE (inner_array
);
10108 el_type
= TYPE_TARGET_TYPE (inner_array
);
10109 TYPE_TARGET_TYPE (inner_array
) =
10110 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
10112 return set_die_type (die
, base_type
, cu
);
10115 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
10116 return set_die_type (die
, cv_type
, cu
);
10119 static struct type
*
10120 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10122 struct type
*base_type
, *cv_type
;
10124 base_type
= die_type (die
, cu
);
10126 /* The die_type call above may have already set the type for this DIE. */
10127 cv_type
= get_die_type (die
, cu
);
10131 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
10132 return set_die_type (die
, cv_type
, cu
);
10135 /* Extract all information from a DW_TAG_string_type DIE and add to
10136 the user defined type vector. It isn't really a user defined type,
10137 but it behaves like one, with other DIE's using an AT_user_def_type
10138 attribute to reference it. */
10140 static struct type
*
10141 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10143 struct objfile
*objfile
= cu
->objfile
;
10144 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10145 struct type
*type
, *range_type
, *index_type
, *char_type
;
10146 struct attribute
*attr
;
10147 unsigned int length
;
10149 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
10152 length
= DW_UNSND (attr
);
10156 /* Check for the DW_AT_byte_size attribute. */
10157 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10160 length
= DW_UNSND (attr
);
10168 index_type
= objfile_type (objfile
)->builtin_int
;
10169 range_type
= create_range_type (NULL
, index_type
, 1, length
);
10170 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
10171 type
= create_string_type (NULL
, char_type
, range_type
);
10173 return set_die_type (die
, type
, cu
);
10176 /* Handle DIES due to C code like:
10180 int (*funcp)(int a, long l);
10184 ('funcp' generates a DW_TAG_subroutine_type DIE). */
10186 static struct type
*
10187 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10189 struct objfile
*objfile
= cu
->objfile
;
10190 struct type
*type
; /* Type that this function returns. */
10191 struct type
*ftype
; /* Function that returns above type. */
10192 struct attribute
*attr
;
10194 type
= die_type (die
, cu
);
10196 /* The die_type call above may have already set the type for this DIE. */
10197 ftype
= get_die_type (die
, cu
);
10201 ftype
= lookup_function_type (type
);
10203 /* All functions in C++, Pascal and Java have prototypes. */
10204 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
10205 if ((attr
&& (DW_UNSND (attr
) != 0))
10206 || cu
->language
== language_cplus
10207 || cu
->language
== language_java
10208 || cu
->language
== language_pascal
)
10209 TYPE_PROTOTYPED (ftype
) = 1;
10210 else if (producer_is_realview (cu
->producer
))
10211 /* RealView does not emit DW_AT_prototyped. We can not
10212 distinguish prototyped and unprototyped functions; default to
10213 prototyped, since that is more common in modern code (and
10214 RealView warns about unprototyped functions). */
10215 TYPE_PROTOTYPED (ftype
) = 1;
10217 /* Store the calling convention in the type if it's available in
10218 the subroutine die. Otherwise set the calling convention to
10219 the default value DW_CC_normal. */
10220 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
10222 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
10223 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
10224 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
10226 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
10228 /* We need to add the subroutine type to the die immediately so
10229 we don't infinitely recurse when dealing with parameters
10230 declared as the same subroutine type. */
10231 set_die_type (die
, ftype
, cu
);
10233 if (die
->child
!= NULL
)
10235 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
10236 struct die_info
*child_die
;
10237 int nparams
, iparams
;
10239 /* Count the number of parameters.
10240 FIXME: GDB currently ignores vararg functions, but knows about
10241 vararg member functions. */
10243 child_die
= die
->child
;
10244 while (child_die
&& child_die
->tag
)
10246 if (child_die
->tag
== DW_TAG_formal_parameter
)
10248 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
10249 TYPE_VARARGS (ftype
) = 1;
10250 child_die
= sibling_die (child_die
);
10253 /* Allocate storage for parameters and fill them in. */
10254 TYPE_NFIELDS (ftype
) = nparams
;
10255 TYPE_FIELDS (ftype
) = (struct field
*)
10256 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
10258 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
10259 even if we error out during the parameters reading below. */
10260 for (iparams
= 0; iparams
< nparams
; iparams
++)
10261 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
10264 child_die
= die
->child
;
10265 while (child_die
&& child_die
->tag
)
10267 if (child_die
->tag
== DW_TAG_formal_parameter
)
10269 struct type
*arg_type
;
10271 /* DWARF version 2 has no clean way to discern C++
10272 static and non-static member functions. G++ helps
10273 GDB by marking the first parameter for non-static
10274 member functions (which is the this pointer) as
10275 artificial. We pass this information to
10276 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
10278 DWARF version 3 added DW_AT_object_pointer, which GCC
10279 4.5 does not yet generate. */
10280 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
10282 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
10285 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
10287 /* GCC/43521: In java, the formal parameter
10288 "this" is sometimes not marked with DW_AT_artificial. */
10289 if (cu
->language
== language_java
)
10291 const char *name
= dwarf2_name (child_die
, cu
);
10293 if (name
&& !strcmp (name
, "this"))
10294 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
10297 arg_type
= die_type (child_die
, cu
);
10299 /* RealView does not mark THIS as const, which the testsuite
10300 expects. GCC marks THIS as const in method definitions,
10301 but not in the class specifications (GCC PR 43053). */
10302 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
10303 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
10306 struct dwarf2_cu
*arg_cu
= cu
;
10307 const char *name
= dwarf2_name (child_die
, cu
);
10309 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
10312 /* If the compiler emits this, use it. */
10313 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
10316 else if (name
&& strcmp (name
, "this") == 0)
10317 /* Function definitions will have the argument names. */
10319 else if (name
== NULL
&& iparams
== 0)
10320 /* Declarations may not have the names, so like
10321 elsewhere in GDB, assume an artificial first
10322 argument is "this". */
10326 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
10330 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
10333 child_die
= sibling_die (child_die
);
10340 static struct type
*
10341 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
10343 struct objfile
*objfile
= cu
->objfile
;
10344 const char *name
= NULL
;
10345 struct type
*this_type
, *target_type
;
10347 name
= dwarf2_full_name (NULL
, die
, cu
);
10348 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
10349 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
10350 TYPE_NAME (this_type
) = (char *) name
;
10351 set_die_type (die
, this_type
, cu
);
10352 target_type
= die_type (die
, cu
);
10353 if (target_type
!= this_type
)
10354 TYPE_TARGET_TYPE (this_type
) = target_type
;
10357 /* Self-referential typedefs are, it seems, not allowed by the DWARF
10358 spec and cause infinite loops in GDB. */
10359 complaint (&symfile_complaints
,
10360 _("Self-referential DW_TAG_typedef "
10361 "- DIE at 0x%x [in module %s]"),
10362 die
->offset
.sect_off
, objfile
->name
);
10363 TYPE_TARGET_TYPE (this_type
) = NULL
;
10368 /* Find a representation of a given base type and install
10369 it in the TYPE field of the die. */
10371 static struct type
*
10372 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10374 struct objfile
*objfile
= cu
->objfile
;
10376 struct attribute
*attr
;
10377 int encoding
= 0, size
= 0;
10379 enum type_code code
= TYPE_CODE_INT
;
10380 int type_flags
= 0;
10381 struct type
*target_type
= NULL
;
10383 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
10386 encoding
= DW_UNSND (attr
);
10388 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10391 size
= DW_UNSND (attr
);
10393 name
= dwarf2_name (die
, cu
);
10396 complaint (&symfile_complaints
,
10397 _("DW_AT_name missing from DW_TAG_base_type"));
10402 case DW_ATE_address
:
10403 /* Turn DW_ATE_address into a void * pointer. */
10404 code
= TYPE_CODE_PTR
;
10405 type_flags
|= TYPE_FLAG_UNSIGNED
;
10406 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
10408 case DW_ATE_boolean
:
10409 code
= TYPE_CODE_BOOL
;
10410 type_flags
|= TYPE_FLAG_UNSIGNED
;
10412 case DW_ATE_complex_float
:
10413 code
= TYPE_CODE_COMPLEX
;
10414 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
10416 case DW_ATE_decimal_float
:
10417 code
= TYPE_CODE_DECFLOAT
;
10420 code
= TYPE_CODE_FLT
;
10422 case DW_ATE_signed
:
10424 case DW_ATE_unsigned
:
10425 type_flags
|= TYPE_FLAG_UNSIGNED
;
10426 if (cu
->language
== language_fortran
10428 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
10429 code
= TYPE_CODE_CHAR
;
10431 case DW_ATE_signed_char
:
10432 if (cu
->language
== language_ada
|| cu
->language
== language_m2
10433 || cu
->language
== language_pascal
10434 || cu
->language
== language_fortran
)
10435 code
= TYPE_CODE_CHAR
;
10437 case DW_ATE_unsigned_char
:
10438 if (cu
->language
== language_ada
|| cu
->language
== language_m2
10439 || cu
->language
== language_pascal
10440 || cu
->language
== language_fortran
)
10441 code
= TYPE_CODE_CHAR
;
10442 type_flags
|= TYPE_FLAG_UNSIGNED
;
10445 /* We just treat this as an integer and then recognize the
10446 type by name elsewhere. */
10450 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
10451 dwarf_type_encoding_name (encoding
));
10455 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
10456 TYPE_NAME (type
) = name
;
10457 TYPE_TARGET_TYPE (type
) = target_type
;
10459 if (name
&& strcmp (name
, "char") == 0)
10460 TYPE_NOSIGN (type
) = 1;
10462 return set_die_type (die
, type
, cu
);
10465 /* Read the given DW_AT_subrange DIE. */
10467 static struct type
*
10468 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10470 struct type
*base_type
;
10471 struct type
*range_type
;
10472 struct attribute
*attr
;
10474 int low_default_is_valid
;
10476 LONGEST negative_mask
;
10478 base_type
= die_type (die
, cu
);
10479 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
10480 check_typedef (base_type
);
10482 /* The die_type call above may have already set the type for this DIE. */
10483 range_type
= get_die_type (die
, cu
);
10487 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
10488 omitting DW_AT_lower_bound. */
10489 switch (cu
->language
)
10492 case language_cplus
:
10494 low_default_is_valid
= 1;
10496 case language_fortran
:
10498 low_default_is_valid
= 1;
10501 case language_java
:
10502 case language_objc
:
10504 low_default_is_valid
= (cu
->header
.version
>= 4);
10508 case language_pascal
:
10510 low_default_is_valid
= (cu
->header
.version
>= 4);
10514 low_default_is_valid
= 0;
10518 /* FIXME: For variable sized arrays either of these could be
10519 a variable rather than a constant value. We'll allow it,
10520 but we don't know how to handle it. */
10521 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
10523 low
= dwarf2_get_attr_constant_value (attr
, low
);
10524 else if (!low_default_is_valid
)
10525 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
10526 "- DIE at 0x%x [in module %s]"),
10527 die
->offset
.sect_off
, cu
->objfile
->name
);
10529 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
10532 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
10534 /* GCC encodes arrays with unspecified or dynamic length
10535 with a DW_FORM_block1 attribute or a reference attribute.
10536 FIXME: GDB does not yet know how to handle dynamic
10537 arrays properly, treat them as arrays with unspecified
10540 FIXME: jimb/2003-09-22: GDB does not really know
10541 how to handle arrays of unspecified length
10542 either; we just represent them as zero-length
10543 arrays. Choose an appropriate upper bound given
10544 the lower bound we've computed above. */
10548 high
= dwarf2_get_attr_constant_value (attr
, 1);
10552 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
10555 int count
= dwarf2_get_attr_constant_value (attr
, 1);
10556 high
= low
+ count
- 1;
10560 /* Unspecified array length. */
10565 /* Dwarf-2 specifications explicitly allows to create subrange types
10566 without specifying a base type.
10567 In that case, the base type must be set to the type of
10568 the lower bound, upper bound or count, in that order, if any of these
10569 three attributes references an object that has a type.
10570 If no base type is found, the Dwarf-2 specifications say that
10571 a signed integer type of size equal to the size of an address should
10573 For the following C code: `extern char gdb_int [];'
10574 GCC produces an empty range DIE.
10575 FIXME: muller/2010-05-28: Possible references to object for low bound,
10576 high bound or count are not yet handled by this code. */
10577 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
10579 struct objfile
*objfile
= cu
->objfile
;
10580 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10581 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
10582 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
10584 /* Test "int", "long int", and "long long int" objfile types,
10585 and select the first one having a size above or equal to the
10586 architecture address size. */
10587 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10588 base_type
= int_type
;
10591 int_type
= objfile_type (objfile
)->builtin_long
;
10592 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10593 base_type
= int_type
;
10596 int_type
= objfile_type (objfile
)->builtin_long_long
;
10597 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
10598 base_type
= int_type
;
10604 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
10605 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
10606 low
|= negative_mask
;
10607 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
10608 high
|= negative_mask
;
10610 range_type
= create_range_type (NULL
, base_type
, low
, high
);
10612 /* Mark arrays with dynamic length at least as an array of unspecified
10613 length. GDB could check the boundary but before it gets implemented at
10614 least allow accessing the array elements. */
10615 if (attr
&& attr_form_is_block (attr
))
10616 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
10618 /* Ada expects an empty array on no boundary attributes. */
10619 if (attr
== NULL
&& cu
->language
!= language_ada
)
10620 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
10622 name
= dwarf2_name (die
, cu
);
10624 TYPE_NAME (range_type
) = name
;
10626 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10628 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
10630 set_die_type (die
, range_type
, cu
);
10632 /* set_die_type should be already done. */
10633 set_descriptive_type (range_type
, die
, cu
);
10638 static struct type
*
10639 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10643 /* For now, we only support the C meaning of an unspecified type: void. */
10645 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
10646 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
10648 return set_die_type (die
, type
, cu
);
10651 /* Read a single die and all its descendents. Set the die's sibling
10652 field to NULL; set other fields in the die correctly, and set all
10653 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
10654 location of the info_ptr after reading all of those dies. PARENT
10655 is the parent of the die in question. */
10657 static struct die_info
*
10658 read_die_and_children (const struct die_reader_specs
*reader
,
10659 gdb_byte
*info_ptr
,
10660 gdb_byte
**new_info_ptr
,
10661 struct die_info
*parent
)
10663 struct die_info
*die
;
10667 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
10670 *new_info_ptr
= cur_ptr
;
10673 store_in_ref_table (die
, reader
->cu
);
10676 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
10680 *new_info_ptr
= cur_ptr
;
10683 die
->sibling
= NULL
;
10684 die
->parent
= parent
;
10688 /* Read a die, all of its descendents, and all of its siblings; set
10689 all of the fields of all of the dies correctly. Arguments are as
10690 in read_die_and_children. */
10692 static struct die_info
*
10693 read_die_and_siblings (const struct die_reader_specs
*reader
,
10694 gdb_byte
*info_ptr
,
10695 gdb_byte
**new_info_ptr
,
10696 struct die_info
*parent
)
10698 struct die_info
*first_die
, *last_sibling
;
10701 cur_ptr
= info_ptr
;
10702 first_die
= last_sibling
= NULL
;
10706 struct die_info
*die
10707 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
10711 *new_info_ptr
= cur_ptr
;
10718 last_sibling
->sibling
= die
;
10720 last_sibling
= die
;
10724 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
10726 The caller is responsible for filling in the extra attributes
10727 and updating (*DIEP)->num_attrs.
10728 Set DIEP to point to a newly allocated die with its information,
10729 except for its child, sibling, and parent fields.
10730 Set HAS_CHILDREN to tell whether the die has children or not. */
10733 read_full_die_1 (const struct die_reader_specs
*reader
,
10734 struct die_info
**diep
, gdb_byte
*info_ptr
,
10735 int *has_children
, int num_extra_attrs
)
10737 unsigned int abbrev_number
, bytes_read
, i
;
10738 sect_offset offset
;
10739 struct abbrev_info
*abbrev
;
10740 struct die_info
*die
;
10741 struct dwarf2_cu
*cu
= reader
->cu
;
10742 bfd
*abfd
= reader
->abfd
;
10744 offset
.sect_off
= info_ptr
- reader
->buffer
;
10745 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10746 info_ptr
+= bytes_read
;
10747 if (!abbrev_number
)
10754 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
10756 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
10758 bfd_get_filename (abfd
));
10760 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
10761 die
->offset
= offset
;
10762 die
->tag
= abbrev
->tag
;
10763 die
->abbrev
= abbrev_number
;
10765 /* Make the result usable.
10766 The caller needs to update num_attrs after adding the extra
10768 die
->num_attrs
= abbrev
->num_attrs
;
10770 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
10771 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
10775 *has_children
= abbrev
->has_children
;
10779 /* Read a die and all its attributes.
10780 Set DIEP to point to a newly allocated die with its information,
10781 except for its child, sibling, and parent fields.
10782 Set HAS_CHILDREN to tell whether the die has children or not. */
10785 read_full_die (const struct die_reader_specs
*reader
,
10786 struct die_info
**diep
, gdb_byte
*info_ptr
,
10789 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
10792 /* In DWARF version 2, the description of the debugging information is
10793 stored in a separate .debug_abbrev section. Before we read any
10794 dies from a section we read in all abbreviations and install them
10795 in a hash table. This function also sets flags in CU describing
10796 the data found in the abbrev table. */
10799 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
10800 struct dwarf2_section_info
*abbrev_section
)
10803 bfd
*abfd
= abbrev_section
->asection
->owner
;
10804 struct comp_unit_head
*cu_header
= &cu
->header
;
10805 gdb_byte
*abbrev_ptr
;
10806 struct abbrev_info
*cur_abbrev
;
10807 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
10808 unsigned int abbrev_form
, hash_number
;
10809 struct attr_abbrev
*cur_attrs
;
10810 unsigned int allocated_attrs
;
10812 /* Initialize dwarf2 abbrevs. */
10813 obstack_init (&cu
->abbrev_obstack
);
10814 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
10816 * sizeof (struct abbrev_info
*)));
10817 memset (cu
->dwarf2_abbrevs
, 0,
10818 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
10820 dwarf2_read_section (cu
->objfile
, abbrev_section
);
10821 abbrev_ptr
= abbrev_section
->buffer
+ cu_header
->abbrev_offset
.sect_off
;
10822 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10823 abbrev_ptr
+= bytes_read
;
10825 allocated_attrs
= ATTR_ALLOC_CHUNK
;
10826 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
10828 /* Loop until we reach an abbrev number of 0. */
10829 while (abbrev_number
)
10831 cur_abbrev
= dwarf_alloc_abbrev (cu
);
10833 /* read in abbrev header */
10834 cur_abbrev
->number
= abbrev_number
;
10835 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10836 abbrev_ptr
+= bytes_read
;
10837 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
10840 /* now read in declarations */
10841 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10842 abbrev_ptr
+= bytes_read
;
10843 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10844 abbrev_ptr
+= bytes_read
;
10845 while (abbrev_name
)
10847 if (cur_abbrev
->num_attrs
== allocated_attrs
)
10849 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
10851 = xrealloc (cur_attrs
, (allocated_attrs
10852 * sizeof (struct attr_abbrev
)));
10855 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
10856 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
10857 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10858 abbrev_ptr
+= bytes_read
;
10859 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10860 abbrev_ptr
+= bytes_read
;
10863 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
10864 (cur_abbrev
->num_attrs
10865 * sizeof (struct attr_abbrev
)));
10866 memcpy (cur_abbrev
->attrs
, cur_attrs
,
10867 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
10869 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
10870 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
10871 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
10873 /* Get next abbreviation.
10874 Under Irix6 the abbreviations for a compilation unit are not
10875 always properly terminated with an abbrev number of 0.
10876 Exit loop if we encounter an abbreviation which we have
10877 already read (which means we are about to read the abbreviations
10878 for the next compile unit) or if the end of the abbreviation
10879 table is reached. */
10880 if ((unsigned int) (abbrev_ptr
- abbrev_section
->buffer
)
10881 >= abbrev_section
->size
)
10883 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
10884 abbrev_ptr
+= bytes_read
;
10885 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
10892 /* Release the memory used by the abbrev table for a compilation unit. */
10895 dwarf2_free_abbrev_table (void *ptr_to_cu
)
10897 struct dwarf2_cu
*cu
= ptr_to_cu
;
10899 obstack_free (&cu
->abbrev_obstack
, NULL
);
10900 cu
->dwarf2_abbrevs
= NULL
;
10903 /* Lookup an abbrev_info structure in the abbrev hash table. */
10905 static struct abbrev_info
*
10906 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
10908 unsigned int hash_number
;
10909 struct abbrev_info
*abbrev
;
10911 hash_number
= number
% ABBREV_HASH_SIZE
;
10912 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
10916 if (abbrev
->number
== number
)
10919 abbrev
= abbrev
->next
;
10924 /* Returns nonzero if TAG represents a type that we might generate a partial
10928 is_type_tag_for_partial (int tag
)
10933 /* Some types that would be reasonable to generate partial symbols for,
10934 that we don't at present. */
10935 case DW_TAG_array_type
:
10936 case DW_TAG_file_type
:
10937 case DW_TAG_ptr_to_member_type
:
10938 case DW_TAG_set_type
:
10939 case DW_TAG_string_type
:
10940 case DW_TAG_subroutine_type
:
10942 case DW_TAG_base_type
:
10943 case DW_TAG_class_type
:
10944 case DW_TAG_interface_type
:
10945 case DW_TAG_enumeration_type
:
10946 case DW_TAG_structure_type
:
10947 case DW_TAG_subrange_type
:
10948 case DW_TAG_typedef
:
10949 case DW_TAG_union_type
:
10956 /* Load all DIEs that are interesting for partial symbols into memory. */
10958 static struct partial_die_info
*
10959 load_partial_dies (const struct die_reader_specs
*reader
,
10960 gdb_byte
*info_ptr
, int building_psymtab
)
10962 struct dwarf2_cu
*cu
= reader
->cu
;
10963 struct objfile
*objfile
= cu
->objfile
;
10964 struct partial_die_info
*part_die
;
10965 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
10966 struct abbrev_info
*abbrev
;
10967 unsigned int bytes_read
;
10968 unsigned int load_all
= 0;
10969 int nesting_level
= 1;
10974 gdb_assert (cu
->per_cu
!= NULL
);
10975 if (cu
->per_cu
->load_all_dies
)
10979 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10983 &cu
->comp_unit_obstack
,
10984 hashtab_obstack_allocate
,
10985 dummy_obstack_deallocate
);
10987 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
10988 sizeof (struct partial_die_info
));
10992 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
10994 /* A NULL abbrev means the end of a series of children. */
10995 if (abbrev
== NULL
)
10997 if (--nesting_level
== 0)
10999 /* PART_DIE was probably the last thing allocated on the
11000 comp_unit_obstack, so we could call obstack_free
11001 here. We don't do that because the waste is small,
11002 and will be cleaned up when we're done with this
11003 compilation unit. This way, we're also more robust
11004 against other users of the comp_unit_obstack. */
11007 info_ptr
+= bytes_read
;
11008 last_die
= parent_die
;
11009 parent_die
= parent_die
->die_parent
;
11013 /* Check for template arguments. We never save these; if
11014 they're seen, we just mark the parent, and go on our way. */
11015 if (parent_die
!= NULL
11016 && cu
->language
== language_cplus
11017 && (abbrev
->tag
== DW_TAG_template_type_param
11018 || abbrev
->tag
== DW_TAG_template_value_param
))
11020 parent_die
->has_template_arguments
= 1;
11024 /* We don't need a partial DIE for the template argument. */
11025 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11030 /* We only recurse into c++ subprograms looking for template arguments.
11031 Skip their other children. */
11033 && cu
->language
== language_cplus
11034 && parent_die
!= NULL
11035 && parent_die
->tag
== DW_TAG_subprogram
)
11037 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11041 /* Check whether this DIE is interesting enough to save. Normally
11042 we would not be interested in members here, but there may be
11043 later variables referencing them via DW_AT_specification (for
11044 static members). */
11046 && !is_type_tag_for_partial (abbrev
->tag
)
11047 && abbrev
->tag
!= DW_TAG_constant
11048 && abbrev
->tag
!= DW_TAG_enumerator
11049 && abbrev
->tag
!= DW_TAG_subprogram
11050 && abbrev
->tag
!= DW_TAG_lexical_block
11051 && abbrev
->tag
!= DW_TAG_variable
11052 && abbrev
->tag
!= DW_TAG_namespace
11053 && abbrev
->tag
!= DW_TAG_module
11054 && abbrev
->tag
!= DW_TAG_member
11055 && abbrev
->tag
!= DW_TAG_imported_unit
)
11057 /* Otherwise we skip to the next sibling, if any. */
11058 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
11062 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
11065 /* This two-pass algorithm for processing partial symbols has a
11066 high cost in cache pressure. Thus, handle some simple cases
11067 here which cover the majority of C partial symbols. DIEs
11068 which neither have specification tags in them, nor could have
11069 specification tags elsewhere pointing at them, can simply be
11070 processed and discarded.
11072 This segment is also optional; scan_partial_symbols and
11073 add_partial_symbol will handle these DIEs if we chain
11074 them in normally. When compilers which do not emit large
11075 quantities of duplicate debug information are more common,
11076 this code can probably be removed. */
11078 /* Any complete simple types at the top level (pretty much all
11079 of them, for a language without namespaces), can be processed
11081 if (parent_die
== NULL
11082 && part_die
->has_specification
== 0
11083 && part_die
->is_declaration
== 0
11084 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
11085 || part_die
->tag
== DW_TAG_base_type
11086 || part_die
->tag
== DW_TAG_subrange_type
))
11088 if (building_psymtab
&& part_die
->name
!= NULL
)
11089 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
11090 VAR_DOMAIN
, LOC_TYPEDEF
,
11091 &objfile
->static_psymbols
,
11092 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
11093 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
11097 /* The exception for DW_TAG_typedef with has_children above is
11098 a workaround of GCC PR debug/47510. In the case of this complaint
11099 type_name_no_tag_or_error will error on such types later.
11101 GDB skipped children of DW_TAG_typedef by the shortcut above and then
11102 it could not find the child DIEs referenced later, this is checked
11103 above. In correct DWARF DW_TAG_typedef should have no children. */
11105 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
11106 complaint (&symfile_complaints
,
11107 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
11108 "- DIE at 0x%x [in module %s]"),
11109 part_die
->offset
.sect_off
, objfile
->name
);
11111 /* If we're at the second level, and we're an enumerator, and
11112 our parent has no specification (meaning possibly lives in a
11113 namespace elsewhere), then we can add the partial symbol now
11114 instead of queueing it. */
11115 if (part_die
->tag
== DW_TAG_enumerator
11116 && parent_die
!= NULL
11117 && parent_die
->die_parent
== NULL
11118 && parent_die
->tag
== DW_TAG_enumeration_type
11119 && parent_die
->has_specification
== 0)
11121 if (part_die
->name
== NULL
)
11122 complaint (&symfile_complaints
,
11123 _("malformed enumerator DIE ignored"));
11124 else if (building_psymtab
)
11125 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
11126 VAR_DOMAIN
, LOC_CONST
,
11127 (cu
->language
== language_cplus
11128 || cu
->language
== language_java
)
11129 ? &objfile
->global_psymbols
11130 : &objfile
->static_psymbols
,
11131 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
11133 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
11137 /* We'll save this DIE so link it in. */
11138 part_die
->die_parent
= parent_die
;
11139 part_die
->die_sibling
= NULL
;
11140 part_die
->die_child
= NULL
;
11142 if (last_die
&& last_die
== parent_die
)
11143 last_die
->die_child
= part_die
;
11145 last_die
->die_sibling
= part_die
;
11147 last_die
= part_die
;
11149 if (first_die
== NULL
)
11150 first_die
= part_die
;
11152 /* Maybe add the DIE to the hash table. Not all DIEs that we
11153 find interesting need to be in the hash table, because we
11154 also have the parent/sibling/child chains; only those that we
11155 might refer to by offset later during partial symbol reading.
11157 For now this means things that might have be the target of a
11158 DW_AT_specification, DW_AT_abstract_origin, or
11159 DW_AT_extension. DW_AT_extension will refer only to
11160 namespaces; DW_AT_abstract_origin refers to functions (and
11161 many things under the function DIE, but we do not recurse
11162 into function DIEs during partial symbol reading) and
11163 possibly variables as well; DW_AT_specification refers to
11164 declarations. Declarations ought to have the DW_AT_declaration
11165 flag. It happens that GCC forgets to put it in sometimes, but
11166 only for functions, not for types.
11168 Adding more things than necessary to the hash table is harmless
11169 except for the performance cost. Adding too few will result in
11170 wasted time in find_partial_die, when we reread the compilation
11171 unit with load_all_dies set. */
11174 || abbrev
->tag
== DW_TAG_constant
11175 || abbrev
->tag
== DW_TAG_subprogram
11176 || abbrev
->tag
== DW_TAG_variable
11177 || abbrev
->tag
== DW_TAG_namespace
11178 || part_die
->is_declaration
)
11182 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
11183 part_die
->offset
.sect_off
, INSERT
);
11187 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
11188 sizeof (struct partial_die_info
));
11190 /* For some DIEs we want to follow their children (if any). For C
11191 we have no reason to follow the children of structures; for other
11192 languages we have to, so that we can get at method physnames
11193 to infer fully qualified class names, for DW_AT_specification,
11194 and for C++ template arguments. For C++, we also look one level
11195 inside functions to find template arguments (if the name of the
11196 function does not already contain the template arguments).
11198 For Ada, we need to scan the children of subprograms and lexical
11199 blocks as well because Ada allows the definition of nested
11200 entities that could be interesting for the debugger, such as
11201 nested subprograms for instance. */
11202 if (last_die
->has_children
11204 || last_die
->tag
== DW_TAG_namespace
11205 || last_die
->tag
== DW_TAG_module
11206 || last_die
->tag
== DW_TAG_enumeration_type
11207 || (cu
->language
== language_cplus
11208 && last_die
->tag
== DW_TAG_subprogram
11209 && (last_die
->name
== NULL
11210 || strchr (last_die
->name
, '<') == NULL
))
11211 || (cu
->language
!= language_c
11212 && (last_die
->tag
== DW_TAG_class_type
11213 || last_die
->tag
== DW_TAG_interface_type
11214 || last_die
->tag
== DW_TAG_structure_type
11215 || last_die
->tag
== DW_TAG_union_type
))
11216 || (cu
->language
== language_ada
11217 && (last_die
->tag
== DW_TAG_subprogram
11218 || last_die
->tag
== DW_TAG_lexical_block
))))
11221 parent_die
= last_die
;
11225 /* Otherwise we skip to the next sibling, if any. */
11226 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
11228 /* Back to the top, do it again. */
11232 /* Read a minimal amount of information into the minimal die structure. */
11235 read_partial_die (const struct die_reader_specs
*reader
,
11236 struct partial_die_info
*part_die
,
11237 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
11238 gdb_byte
*info_ptr
)
11240 struct dwarf2_cu
*cu
= reader
->cu
;
11241 struct objfile
*objfile
= cu
->objfile
;
11242 gdb_byte
*buffer
= reader
->buffer
;
11244 struct attribute attr
;
11245 int has_low_pc_attr
= 0;
11246 int has_high_pc_attr
= 0;
11247 int high_pc_relative
= 0;
11249 memset (part_die
, 0, sizeof (struct partial_die_info
));
11251 part_die
->offset
.sect_off
= info_ptr
- buffer
;
11253 info_ptr
+= abbrev_len
;
11255 if (abbrev
== NULL
)
11258 part_die
->tag
= abbrev
->tag
;
11259 part_die
->has_children
= abbrev
->has_children
;
11261 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
11263 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
11265 /* Store the data if it is of an attribute we want to keep in a
11266 partial symbol table. */
11270 switch (part_die
->tag
)
11272 case DW_TAG_compile_unit
:
11273 case DW_TAG_partial_unit
:
11274 case DW_TAG_type_unit
:
11275 /* Compilation units have a DW_AT_name that is a filename, not
11276 a source language identifier. */
11277 case DW_TAG_enumeration_type
:
11278 case DW_TAG_enumerator
:
11279 /* These tags always have simple identifiers already; no need
11280 to canonicalize them. */
11281 part_die
->name
= DW_STRING (&attr
);
11285 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
11286 &objfile
->objfile_obstack
);
11290 case DW_AT_linkage_name
:
11291 case DW_AT_MIPS_linkage_name
:
11292 /* Note that both forms of linkage name might appear. We
11293 assume they will be the same, and we only store the last
11295 if (cu
->language
== language_ada
)
11296 part_die
->name
= DW_STRING (&attr
);
11297 part_die
->linkage_name
= DW_STRING (&attr
);
11300 has_low_pc_attr
= 1;
11301 part_die
->lowpc
= DW_ADDR (&attr
);
11303 case DW_AT_high_pc
:
11304 has_high_pc_attr
= 1;
11305 if (attr
.form
== DW_FORM_addr
11306 || attr
.form
== DW_FORM_GNU_addr_index
)
11307 part_die
->highpc
= DW_ADDR (&attr
);
11310 high_pc_relative
= 1;
11311 part_die
->highpc
= DW_UNSND (&attr
);
11314 case DW_AT_location
:
11315 /* Support the .debug_loc offsets. */
11316 if (attr_form_is_block (&attr
))
11318 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
11320 else if (attr_form_is_section_offset (&attr
))
11322 dwarf2_complex_location_expr_complaint ();
11326 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
11327 "partial symbol information");
11330 case DW_AT_external
:
11331 part_die
->is_external
= DW_UNSND (&attr
);
11333 case DW_AT_declaration
:
11334 part_die
->is_declaration
= DW_UNSND (&attr
);
11337 part_die
->has_type
= 1;
11339 case DW_AT_abstract_origin
:
11340 case DW_AT_specification
:
11341 case DW_AT_extension
:
11342 part_die
->has_specification
= 1;
11343 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
11345 case DW_AT_sibling
:
11346 /* Ignore absolute siblings, they might point outside of
11347 the current compile unit. */
11348 if (attr
.form
== DW_FORM_ref_addr
)
11349 complaint (&symfile_complaints
,
11350 _("ignoring absolute DW_AT_sibling"));
11352 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
11354 case DW_AT_byte_size
:
11355 part_die
->has_byte_size
= 1;
11357 case DW_AT_calling_convention
:
11358 /* DWARF doesn't provide a way to identify a program's source-level
11359 entry point. DW_AT_calling_convention attributes are only meant
11360 to describe functions' calling conventions.
11362 However, because it's a necessary piece of information in
11363 Fortran, and because DW_CC_program is the only piece of debugging
11364 information whose definition refers to a 'main program' at all,
11365 several compilers have begun marking Fortran main programs with
11366 DW_CC_program --- even when those functions use the standard
11367 calling conventions.
11369 So until DWARF specifies a way to provide this information and
11370 compilers pick up the new representation, we'll support this
11372 if (DW_UNSND (&attr
) == DW_CC_program
11373 && cu
->language
== language_fortran
)
11375 set_main_name (part_die
->name
);
11377 /* As this DIE has a static linkage the name would be difficult
11378 to look up later. */
11379 language_of_main
= language_fortran
;
11383 if (DW_UNSND (&attr
) == DW_INL_inlined
11384 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
11385 part_die
->may_be_inlined
= 1;
11389 if (part_die
->tag
== DW_TAG_imported_unit
)
11390 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
11398 if (high_pc_relative
)
11399 part_die
->highpc
+= part_die
->lowpc
;
11401 if (has_low_pc_attr
&& has_high_pc_attr
)
11403 /* When using the GNU linker, .gnu.linkonce. sections are used to
11404 eliminate duplicate copies of functions and vtables and such.
11405 The linker will arbitrarily choose one and discard the others.
11406 The AT_*_pc values for such functions refer to local labels in
11407 these sections. If the section from that file was discarded, the
11408 labels are not in the output, so the relocs get a value of 0.
11409 If this is a discarded function, mark the pc bounds as invalid,
11410 so that GDB will ignore it. */
11411 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11413 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11415 complaint (&symfile_complaints
,
11416 _("DW_AT_low_pc %s is zero "
11417 "for DIE at 0x%x [in module %s]"),
11418 paddress (gdbarch
, part_die
->lowpc
),
11419 part_die
->offset
.sect_off
, objfile
->name
);
11421 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
11422 else if (part_die
->lowpc
>= part_die
->highpc
)
11424 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11426 complaint (&symfile_complaints
,
11427 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
11428 "for DIE at 0x%x [in module %s]"),
11429 paddress (gdbarch
, part_die
->lowpc
),
11430 paddress (gdbarch
, part_die
->highpc
),
11431 part_die
->offset
.sect_off
, objfile
->name
);
11434 part_die
->has_pc_info
= 1;
11440 /* Find a cached partial DIE at OFFSET in CU. */
11442 static struct partial_die_info
*
11443 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
11445 struct partial_die_info
*lookup_die
= NULL
;
11446 struct partial_die_info part_die
;
11448 part_die
.offset
= offset
;
11449 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
11455 /* Find a partial DIE at OFFSET, which may or may not be in CU,
11456 except in the case of .debug_types DIEs which do not reference
11457 outside their CU (they do however referencing other types via
11458 DW_FORM_ref_sig8). */
11460 static struct partial_die_info
*
11461 find_partial_die (sect_offset offset
, struct dwarf2_cu
*cu
)
11463 struct objfile
*objfile
= cu
->objfile
;
11464 struct dwarf2_per_cu_data
*per_cu
= NULL
;
11465 struct partial_die_info
*pd
= NULL
;
11467 if (offset_in_cu_p (&cu
->header
, offset
))
11469 pd
= find_partial_die_in_comp_unit (offset
, cu
);
11472 /* We missed recording what we needed.
11473 Load all dies and try again. */
11474 per_cu
= cu
->per_cu
;
11478 /* TUs don't reference other CUs/TUs (except via type signatures). */
11479 if (cu
->per_cu
->is_debug_types
)
11481 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
11482 " external reference to offset 0x%lx [in module %s].\n"),
11483 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
11484 bfd_get_filename (objfile
->obfd
));
11486 per_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11488 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
11489 load_partial_comp_unit (per_cu
);
11491 per_cu
->cu
->last_used
= 0;
11492 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
11495 /* If we didn't find it, and not all dies have been loaded,
11496 load them all and try again. */
11498 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
11500 per_cu
->load_all_dies
= 1;
11502 /* This is nasty. When we reread the DIEs, somewhere up the call chain
11503 THIS_CU->cu may already be in use. So we can't just free it and
11504 replace its DIEs with the ones we read in. Instead, we leave those
11505 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
11506 and clobber THIS_CU->cu->partial_dies with the hash table for the new
11508 load_partial_comp_unit (per_cu
);
11510 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
11514 internal_error (__FILE__
, __LINE__
,
11515 _("could not find partial DIE 0x%x "
11516 "in cache [from module %s]\n"),
11517 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
11521 /* See if we can figure out if the class lives in a namespace. We do
11522 this by looking for a member function; its demangled name will
11523 contain namespace info, if there is any. */
11526 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
11527 struct dwarf2_cu
*cu
)
11529 /* NOTE: carlton/2003-10-07: Getting the info this way changes
11530 what template types look like, because the demangler
11531 frequently doesn't give the same name as the debug info. We
11532 could fix this by only using the demangled name to get the
11533 prefix (but see comment in read_structure_type). */
11535 struct partial_die_info
*real_pdi
;
11536 struct partial_die_info
*child_pdi
;
11538 /* If this DIE (this DIE's specification, if any) has a parent, then
11539 we should not do this. We'll prepend the parent's fully qualified
11540 name when we create the partial symbol. */
11542 real_pdi
= struct_pdi
;
11543 while (real_pdi
->has_specification
)
11544 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
11546 if (real_pdi
->die_parent
!= NULL
)
11549 for (child_pdi
= struct_pdi
->die_child
;
11551 child_pdi
= child_pdi
->die_sibling
)
11553 if (child_pdi
->tag
== DW_TAG_subprogram
11554 && child_pdi
->linkage_name
!= NULL
)
11556 char *actual_class_name
11557 = language_class_name_from_physname (cu
->language_defn
,
11558 child_pdi
->linkage_name
);
11559 if (actual_class_name
!= NULL
)
11562 = obsavestring (actual_class_name
,
11563 strlen (actual_class_name
),
11564 &cu
->objfile
->objfile_obstack
);
11565 xfree (actual_class_name
);
11572 /* Adjust PART_DIE before generating a symbol for it. This function
11573 may set the is_external flag or change the DIE's name. */
11576 fixup_partial_die (struct partial_die_info
*part_die
,
11577 struct dwarf2_cu
*cu
)
11579 /* Once we've fixed up a die, there's no point in doing so again.
11580 This also avoids a memory leak if we were to call
11581 guess_partial_die_structure_name multiple times. */
11582 if (part_die
->fixup_called
)
11585 /* If we found a reference attribute and the DIE has no name, try
11586 to find a name in the referred to DIE. */
11588 if (part_die
->name
== NULL
&& part_die
->has_specification
)
11590 struct partial_die_info
*spec_die
;
11592 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
11594 fixup_partial_die (spec_die
, cu
);
11596 if (spec_die
->name
)
11598 part_die
->name
= spec_die
->name
;
11600 /* Copy DW_AT_external attribute if it is set. */
11601 if (spec_die
->is_external
)
11602 part_die
->is_external
= spec_die
->is_external
;
11606 /* Set default names for some unnamed DIEs. */
11608 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
11609 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
11611 /* If there is no parent die to provide a namespace, and there are
11612 children, see if we can determine the namespace from their linkage
11614 if (cu
->language
== language_cplus
11615 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
11616 && part_die
->die_parent
== NULL
11617 && part_die
->has_children
11618 && (part_die
->tag
== DW_TAG_class_type
11619 || part_die
->tag
== DW_TAG_structure_type
11620 || part_die
->tag
== DW_TAG_union_type
))
11621 guess_partial_die_structure_name (part_die
, cu
);
11623 /* GCC might emit a nameless struct or union that has a linkage
11624 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
11625 if (part_die
->name
== NULL
11626 && (part_die
->tag
== DW_TAG_class_type
11627 || part_die
->tag
== DW_TAG_interface_type
11628 || part_die
->tag
== DW_TAG_structure_type
11629 || part_die
->tag
== DW_TAG_union_type
)
11630 && part_die
->linkage_name
!= NULL
)
11634 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
11639 /* Strip any leading namespaces/classes, keep only the base name.
11640 DW_AT_name for named DIEs does not contain the prefixes. */
11641 base
= strrchr (demangled
, ':');
11642 if (base
&& base
> demangled
&& base
[-1] == ':')
11647 part_die
->name
= obsavestring (base
, strlen (base
),
11648 &cu
->objfile
->objfile_obstack
);
11653 part_die
->fixup_called
= 1;
11656 /* Read an attribute value described by an attribute form. */
11659 read_attribute_value (const struct die_reader_specs
*reader
,
11660 struct attribute
*attr
, unsigned form
,
11661 gdb_byte
*info_ptr
)
11663 struct dwarf2_cu
*cu
= reader
->cu
;
11664 bfd
*abfd
= reader
->abfd
;
11665 struct comp_unit_head
*cu_header
= &cu
->header
;
11666 unsigned int bytes_read
;
11667 struct dwarf_block
*blk
;
11672 case DW_FORM_ref_addr
:
11673 if (cu
->header
.version
== 2)
11674 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
11676 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
11677 &cu
->header
, &bytes_read
);
11678 info_ptr
+= bytes_read
;
11681 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
11682 info_ptr
+= bytes_read
;
11684 case DW_FORM_block2
:
11685 blk
= dwarf_alloc_block (cu
);
11686 blk
->size
= read_2_bytes (abfd
, info_ptr
);
11688 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11689 info_ptr
+= blk
->size
;
11690 DW_BLOCK (attr
) = blk
;
11692 case DW_FORM_block4
:
11693 blk
= dwarf_alloc_block (cu
);
11694 blk
->size
= read_4_bytes (abfd
, info_ptr
);
11696 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11697 info_ptr
+= blk
->size
;
11698 DW_BLOCK (attr
) = blk
;
11700 case DW_FORM_data2
:
11701 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
11704 case DW_FORM_data4
:
11705 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
11708 case DW_FORM_data8
:
11709 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
11712 case DW_FORM_sec_offset
:
11713 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
11714 info_ptr
+= bytes_read
;
11716 case DW_FORM_string
:
11717 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
11718 DW_STRING_IS_CANONICAL (attr
) = 0;
11719 info_ptr
+= bytes_read
;
11722 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
11724 DW_STRING_IS_CANONICAL (attr
) = 0;
11725 info_ptr
+= bytes_read
;
11727 case DW_FORM_exprloc
:
11728 case DW_FORM_block
:
11729 blk
= dwarf_alloc_block (cu
);
11730 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11731 info_ptr
+= bytes_read
;
11732 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11733 info_ptr
+= blk
->size
;
11734 DW_BLOCK (attr
) = blk
;
11736 case DW_FORM_block1
:
11737 blk
= dwarf_alloc_block (cu
);
11738 blk
->size
= read_1_byte (abfd
, info_ptr
);
11740 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
11741 info_ptr
+= blk
->size
;
11742 DW_BLOCK (attr
) = blk
;
11744 case DW_FORM_data1
:
11745 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
11749 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
11752 case DW_FORM_flag_present
:
11753 DW_UNSND (attr
) = 1;
11755 case DW_FORM_sdata
:
11756 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
11757 info_ptr
+= bytes_read
;
11759 case DW_FORM_udata
:
11760 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11761 info_ptr
+= bytes_read
;
11764 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11765 + read_1_byte (abfd
, info_ptr
));
11769 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11770 + read_2_bytes (abfd
, info_ptr
));
11774 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11775 + read_4_bytes (abfd
, info_ptr
));
11779 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11780 + read_8_bytes (abfd
, info_ptr
));
11783 case DW_FORM_ref_sig8
:
11784 /* Convert the signature to something we can record in DW_UNSND
11786 NOTE: This is NULL if the type wasn't found. */
11787 DW_SIGNATURED_TYPE (attr
) =
11788 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
11791 case DW_FORM_ref_udata
:
11792 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
11793 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
11794 info_ptr
+= bytes_read
;
11796 case DW_FORM_indirect
:
11797 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11798 info_ptr
+= bytes_read
;
11799 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
11801 case DW_FORM_GNU_addr_index
:
11802 if (reader
->dwo_file
== NULL
)
11804 /* For now flag a hard error.
11805 Later we can turn this into a complaint. */
11806 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
11807 dwarf_form_name (form
),
11808 bfd_get_filename (abfd
));
11810 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
11811 info_ptr
+= bytes_read
;
11813 case DW_FORM_GNU_str_index
:
11814 if (reader
->dwo_file
== NULL
)
11816 /* For now flag a hard error.
11817 Later we can turn this into a complaint if warranted. */
11818 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
11819 dwarf_form_name (form
),
11820 bfd_get_filename (abfd
));
11823 ULONGEST str_index
=
11824 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
11826 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
11827 DW_STRING_IS_CANONICAL (attr
) = 0;
11828 info_ptr
+= bytes_read
;
11832 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
11833 dwarf_form_name (form
),
11834 bfd_get_filename (abfd
));
11837 /* We have seen instances where the compiler tried to emit a byte
11838 size attribute of -1 which ended up being encoded as an unsigned
11839 0xffffffff. Although 0xffffffff is technically a valid size value,
11840 an object of this size seems pretty unlikely so we can relatively
11841 safely treat these cases as if the size attribute was invalid and
11842 treat them as zero by default. */
11843 if (attr
->name
== DW_AT_byte_size
11844 && form
== DW_FORM_data4
11845 && DW_UNSND (attr
) >= 0xffffffff)
11848 (&symfile_complaints
,
11849 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
11850 hex_string (DW_UNSND (attr
)));
11851 DW_UNSND (attr
) = 0;
11857 /* Read an attribute described by an abbreviated attribute. */
11860 read_attribute (const struct die_reader_specs
*reader
,
11861 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
11862 gdb_byte
*info_ptr
)
11864 attr
->name
= abbrev
->name
;
11865 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
11868 /* Read dwarf information from a buffer. */
11870 static unsigned int
11871 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
11873 return bfd_get_8 (abfd
, buf
);
11877 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
11879 return bfd_get_signed_8 (abfd
, buf
);
11882 static unsigned int
11883 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
11885 return bfd_get_16 (abfd
, buf
);
11889 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
11891 return bfd_get_signed_16 (abfd
, buf
);
11894 static unsigned int
11895 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
11897 return bfd_get_32 (abfd
, buf
);
11901 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
11903 return bfd_get_signed_32 (abfd
, buf
);
11907 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
11909 return bfd_get_64 (abfd
, buf
);
11913 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
11914 unsigned int *bytes_read
)
11916 struct comp_unit_head
*cu_header
= &cu
->header
;
11917 CORE_ADDR retval
= 0;
11919 if (cu_header
->signed_addr_p
)
11921 switch (cu_header
->addr_size
)
11924 retval
= bfd_get_signed_16 (abfd
, buf
);
11927 retval
= bfd_get_signed_32 (abfd
, buf
);
11930 retval
= bfd_get_signed_64 (abfd
, buf
);
11933 internal_error (__FILE__
, __LINE__
,
11934 _("read_address: bad switch, signed [in module %s]"),
11935 bfd_get_filename (abfd
));
11940 switch (cu_header
->addr_size
)
11943 retval
= bfd_get_16 (abfd
, buf
);
11946 retval
= bfd_get_32 (abfd
, buf
);
11949 retval
= bfd_get_64 (abfd
, buf
);
11952 internal_error (__FILE__
, __LINE__
,
11953 _("read_address: bad switch, "
11954 "unsigned [in module %s]"),
11955 bfd_get_filename (abfd
));
11959 *bytes_read
= cu_header
->addr_size
;
11963 /* Read the initial length from a section. The (draft) DWARF 3
11964 specification allows the initial length to take up either 4 bytes
11965 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
11966 bytes describe the length and all offsets will be 8 bytes in length
11969 An older, non-standard 64-bit format is also handled by this
11970 function. The older format in question stores the initial length
11971 as an 8-byte quantity without an escape value. Lengths greater
11972 than 2^32 aren't very common which means that the initial 4 bytes
11973 is almost always zero. Since a length value of zero doesn't make
11974 sense for the 32-bit format, this initial zero can be considered to
11975 be an escape value which indicates the presence of the older 64-bit
11976 format. As written, the code can't detect (old format) lengths
11977 greater than 4GB. If it becomes necessary to handle lengths
11978 somewhat larger than 4GB, we could allow other small values (such
11979 as the non-sensical values of 1, 2, and 3) to also be used as
11980 escape values indicating the presence of the old format.
11982 The value returned via bytes_read should be used to increment the
11983 relevant pointer after calling read_initial_length().
11985 [ Note: read_initial_length() and read_offset() are based on the
11986 document entitled "DWARF Debugging Information Format", revision
11987 3, draft 8, dated November 19, 2001. This document was obtained
11990 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
11992 This document is only a draft and is subject to change. (So beware.)
11994 Details regarding the older, non-standard 64-bit format were
11995 determined empirically by examining 64-bit ELF files produced by
11996 the SGI toolchain on an IRIX 6.5 machine.
11998 - Kevin, July 16, 2002
12002 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
12004 LONGEST length
= bfd_get_32 (abfd
, buf
);
12006 if (length
== 0xffffffff)
12008 length
= bfd_get_64 (abfd
, buf
+ 4);
12011 else if (length
== 0)
12013 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
12014 length
= bfd_get_64 (abfd
, buf
);
12025 /* Cover function for read_initial_length.
12026 Returns the length of the object at BUF, and stores the size of the
12027 initial length in *BYTES_READ and stores the size that offsets will be in
12029 If the initial length size is not equivalent to that specified in
12030 CU_HEADER then issue a complaint.
12031 This is useful when reading non-comp-unit headers. */
12034 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
12035 const struct comp_unit_head
*cu_header
,
12036 unsigned int *bytes_read
,
12037 unsigned int *offset_size
)
12039 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
12041 gdb_assert (cu_header
->initial_length_size
== 4
12042 || cu_header
->initial_length_size
== 8
12043 || cu_header
->initial_length_size
== 12);
12045 if (cu_header
->initial_length_size
!= *bytes_read
)
12046 complaint (&symfile_complaints
,
12047 _("intermixed 32-bit and 64-bit DWARF sections"));
12049 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
12053 /* Read an offset from the data stream. The size of the offset is
12054 given by cu_header->offset_size. */
12057 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
12058 unsigned int *bytes_read
)
12060 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
12062 *bytes_read
= cu_header
->offset_size
;
12066 /* Read an offset from the data stream. */
12069 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
12071 LONGEST retval
= 0;
12073 switch (offset_size
)
12076 retval
= bfd_get_32 (abfd
, buf
);
12079 retval
= bfd_get_64 (abfd
, buf
);
12082 internal_error (__FILE__
, __LINE__
,
12083 _("read_offset_1: bad switch [in module %s]"),
12084 bfd_get_filename (abfd
));
12091 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
12093 /* If the size of a host char is 8 bits, we can return a pointer
12094 to the buffer, otherwise we have to copy the data to a buffer
12095 allocated on the temporary obstack. */
12096 gdb_assert (HOST_CHAR_BIT
== 8);
12101 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12103 /* If the size of a host char is 8 bits, we can return a pointer
12104 to the string, otherwise we have to copy the string to a buffer
12105 allocated on the temporary obstack. */
12106 gdb_assert (HOST_CHAR_BIT
== 8);
12109 *bytes_read_ptr
= 1;
12112 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
12113 return (char *) buf
;
12117 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
12119 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
12120 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
12121 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
12122 bfd_get_filename (abfd
));
12123 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
12124 error (_("DW_FORM_strp pointing outside of "
12125 ".debug_str section [in module %s]"),
12126 bfd_get_filename (abfd
));
12127 gdb_assert (HOST_CHAR_BIT
== 8);
12128 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
12130 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
12134 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
12135 const struct comp_unit_head
*cu_header
,
12136 unsigned int *bytes_read_ptr
)
12138 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
12140 return read_indirect_string_at_offset (abfd
, str_offset
);
12144 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12147 unsigned int num_read
;
12149 unsigned char byte
;
12157 byte
= bfd_get_8 (abfd
, buf
);
12160 result
|= ((ULONGEST
) (byte
& 127) << shift
);
12161 if ((byte
& 128) == 0)
12167 *bytes_read_ptr
= num_read
;
12172 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
12175 int i
, shift
, num_read
;
12176 unsigned char byte
;
12184 byte
= bfd_get_8 (abfd
, buf
);
12187 result
|= ((LONGEST
) (byte
& 127) << shift
);
12189 if ((byte
& 128) == 0)
12194 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
12195 result
|= -(((LONGEST
) 1) << shift
);
12196 *bytes_read_ptr
= num_read
;
12200 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
12201 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
12202 ADDR_SIZE is the size of addresses from the CU header. */
12205 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
12207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12208 bfd
*abfd
= objfile
->obfd
;
12209 const gdb_byte
*info_ptr
;
12211 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
12212 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
12213 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
12215 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
12216 error (_("DW_FORM_addr_index pointing outside of "
12217 ".debug_addr section [in module %s]"),
12219 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
12220 + addr_base
+ addr_index
* addr_size
);
12221 if (addr_size
== 4)
12222 return bfd_get_32 (abfd
, info_ptr
);
12224 return bfd_get_64 (abfd
, info_ptr
);
12227 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
12230 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
12232 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
12235 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
12238 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
12239 unsigned int *bytes_read
)
12241 bfd
*abfd
= cu
->objfile
->obfd
;
12242 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
12244 return read_addr_index (cu
, addr_index
);
12247 /* Data structure to pass results from dwarf2_read_addr_index_reader
12248 back to dwarf2_read_addr_index. */
12250 struct dwarf2_read_addr_index_data
12252 ULONGEST addr_base
;
12256 /* die_reader_func for dwarf2_read_addr_index. */
12259 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
12260 gdb_byte
*info_ptr
,
12261 struct die_info
*comp_unit_die
,
12265 struct dwarf2_cu
*cu
= reader
->cu
;
12266 struct dwarf2_read_addr_index_data
*aidata
=
12267 (struct dwarf2_read_addr_index_data
*) data
;
12269 aidata
->addr_base
= cu
->addr_base
;
12270 aidata
->addr_size
= cu
->header
.addr_size
;
12273 /* Given an index in .debug_addr, fetch the value.
12274 NOTE: This can be called during dwarf expression evaluation,
12275 long after the debug information has been read, and thus per_cu->cu
12276 may no longer exist. */
12279 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
12280 unsigned int addr_index
)
12282 struct objfile
*objfile
= per_cu
->objfile
;
12283 struct dwarf2_cu
*cu
= per_cu
->cu
;
12284 ULONGEST addr_base
;
12287 /* This is intended to be called from outside this file. */
12288 dw2_setup (objfile
);
12290 /* We need addr_base and addr_size.
12291 If we don't have PER_CU->cu, we have to get it.
12292 Nasty, but the alternative is storing the needed info in PER_CU,
12293 which at this point doesn't seem justified: it's not clear how frequently
12294 it would get used and it would increase the size of every PER_CU.
12295 Entry points like dwarf2_per_cu_addr_size do a similar thing
12296 so we're not in uncharted territory here.
12297 Alas we need to be a bit more complicated as addr_base is contained
12300 We don't need to read the entire CU(/TU).
12301 We just need the header and top level die.
12302 IWBN to use the aging mechanism to let us lazily later discard the CU.
12303 See however init_cutu_and_read_dies_simple. */
12307 addr_base
= cu
->addr_base
;
12308 addr_size
= cu
->header
.addr_size
;
12312 struct dwarf2_read_addr_index_data aidata
;
12314 init_cutu_and_read_dies_simple (per_cu
, dwarf2_read_addr_index_reader
,
12316 addr_base
= aidata
.addr_base
;
12317 addr_size
= aidata
.addr_size
;
12320 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
12323 /* Given a DW_AT_str_index, fetch the string. */
12326 read_str_index (const struct die_reader_specs
*reader
,
12327 struct dwarf2_cu
*cu
, ULONGEST str_index
)
12329 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12330 const char *dwo_name
= objfile
->name
;
12331 bfd
*abfd
= objfile
->obfd
;
12332 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
12333 gdb_byte
*info_ptr
;
12334 ULONGEST str_offset
;
12336 dwarf2_read_section (objfile
, §ions
->str
);
12337 dwarf2_read_section (objfile
, §ions
->str_offsets
);
12338 if (sections
->str
.buffer
== NULL
)
12339 error (_("DW_FORM_str_index used without .debug_str.dwo section"
12340 " in CU at offset 0x%lx [in module %s]"),
12341 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12342 if (sections
->str_offsets
.buffer
== NULL
)
12343 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
12344 " in CU at offset 0x%lx [in module %s]"),
12345 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12346 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
12347 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
12348 " section in CU at offset 0x%lx [in module %s]"),
12349 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12350 info_ptr
= (sections
->str_offsets
.buffer
12351 + str_index
* cu
->header
.offset_size
);
12352 if (cu
->header
.offset_size
== 4)
12353 str_offset
= bfd_get_32 (abfd
, info_ptr
);
12355 str_offset
= bfd_get_64 (abfd
, info_ptr
);
12356 if (str_offset
>= sections
->str
.size
)
12357 error (_("Offset from DW_FORM_str_index pointing outside of"
12358 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
12359 (long) cu
->header
.offset
.sect_off
, dwo_name
);
12360 return (char *) (sections
->str
.buffer
+ str_offset
);
12363 /* Return the length of an LEB128 number in BUF. */
12366 leb128_size (const gdb_byte
*buf
)
12368 const gdb_byte
*begin
= buf
;
12374 if ((byte
& 128) == 0)
12375 return buf
- begin
;
12380 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
12387 cu
->language
= language_c
;
12389 case DW_LANG_C_plus_plus
:
12390 cu
->language
= language_cplus
;
12393 cu
->language
= language_d
;
12395 case DW_LANG_Fortran77
:
12396 case DW_LANG_Fortran90
:
12397 case DW_LANG_Fortran95
:
12398 cu
->language
= language_fortran
;
12401 cu
->language
= language_go
;
12403 case DW_LANG_Mips_Assembler
:
12404 cu
->language
= language_asm
;
12407 cu
->language
= language_java
;
12409 case DW_LANG_Ada83
:
12410 case DW_LANG_Ada95
:
12411 cu
->language
= language_ada
;
12413 case DW_LANG_Modula2
:
12414 cu
->language
= language_m2
;
12416 case DW_LANG_Pascal83
:
12417 cu
->language
= language_pascal
;
12420 cu
->language
= language_objc
;
12422 case DW_LANG_Cobol74
:
12423 case DW_LANG_Cobol85
:
12425 cu
->language
= language_minimal
;
12428 cu
->language_defn
= language_def (cu
->language
);
12431 /* Return the named attribute or NULL if not there. */
12433 static struct attribute
*
12434 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
12439 struct attribute
*spec
= NULL
;
12441 for (i
= 0; i
< die
->num_attrs
; ++i
)
12443 if (die
->attrs
[i
].name
== name
)
12444 return &die
->attrs
[i
];
12445 if (die
->attrs
[i
].name
== DW_AT_specification
12446 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
12447 spec
= &die
->attrs
[i
];
12453 die
= follow_die_ref (die
, spec
, &cu
);
12459 /* Return the named attribute or NULL if not there,
12460 but do not follow DW_AT_specification, etc.
12461 This is for use in contexts where we're reading .debug_types dies.
12462 Following DW_AT_specification, DW_AT_abstract_origin will take us
12463 back up the chain, and we want to go down. */
12465 static struct attribute
*
12466 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
12467 struct dwarf2_cu
*cu
)
12471 for (i
= 0; i
< die
->num_attrs
; ++i
)
12472 if (die
->attrs
[i
].name
== name
)
12473 return &die
->attrs
[i
];
12478 /* Return non-zero iff the attribute NAME is defined for the given DIE,
12479 and holds a non-zero value. This function should only be used for
12480 DW_FORM_flag or DW_FORM_flag_present attributes. */
12483 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
12485 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
12487 return (attr
&& DW_UNSND (attr
));
12491 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
12493 /* A DIE is a declaration if it has a DW_AT_declaration attribute
12494 which value is non-zero. However, we have to be careful with
12495 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
12496 (via dwarf2_flag_true_p) follows this attribute. So we may
12497 end up accidently finding a declaration attribute that belongs
12498 to a different DIE referenced by the specification attribute,
12499 even though the given DIE does not have a declaration attribute. */
12500 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
12501 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
12504 /* Return the die giving the specification for DIE, if there is
12505 one. *SPEC_CU is the CU containing DIE on input, and the CU
12506 containing the return value on output. If there is no
12507 specification, but there is an abstract origin, that is
12510 static struct die_info
*
12511 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
12513 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
12516 if (spec_attr
== NULL
)
12517 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
12519 if (spec_attr
== NULL
)
12522 return follow_die_ref (die
, spec_attr
, spec_cu
);
12525 /* Free the line_header structure *LH, and any arrays and strings it
12527 NOTE: This is also used as a "cleanup" function. */
12530 free_line_header (struct line_header
*lh
)
12532 if (lh
->standard_opcode_lengths
)
12533 xfree (lh
->standard_opcode_lengths
);
12535 /* Remember that all the lh->file_names[i].name pointers are
12536 pointers into debug_line_buffer, and don't need to be freed. */
12537 if (lh
->file_names
)
12538 xfree (lh
->file_names
);
12540 /* Similarly for the include directory names. */
12541 if (lh
->include_dirs
)
12542 xfree (lh
->include_dirs
);
12547 /* Add an entry to LH's include directory table. */
12550 add_include_dir (struct line_header
*lh
, char *include_dir
)
12552 /* Grow the array if necessary. */
12553 if (lh
->include_dirs_size
== 0)
12555 lh
->include_dirs_size
= 1; /* for testing */
12556 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
12557 * sizeof (*lh
->include_dirs
));
12559 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
12561 lh
->include_dirs_size
*= 2;
12562 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
12563 (lh
->include_dirs_size
12564 * sizeof (*lh
->include_dirs
)));
12567 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
12570 /* Add an entry to LH's file name table. */
12573 add_file_name (struct line_header
*lh
,
12575 unsigned int dir_index
,
12576 unsigned int mod_time
,
12577 unsigned int length
)
12579 struct file_entry
*fe
;
12581 /* Grow the array if necessary. */
12582 if (lh
->file_names_size
== 0)
12584 lh
->file_names_size
= 1; /* for testing */
12585 lh
->file_names
= xmalloc (lh
->file_names_size
12586 * sizeof (*lh
->file_names
));
12588 else if (lh
->num_file_names
>= lh
->file_names_size
)
12590 lh
->file_names_size
*= 2;
12591 lh
->file_names
= xrealloc (lh
->file_names
,
12592 (lh
->file_names_size
12593 * sizeof (*lh
->file_names
)));
12596 fe
= &lh
->file_names
[lh
->num_file_names
++];
12598 fe
->dir_index
= dir_index
;
12599 fe
->mod_time
= mod_time
;
12600 fe
->length
= length
;
12601 fe
->included_p
= 0;
12605 /* Read the statement program header starting at OFFSET in
12606 .debug_line, or .debug_line.dwo. Return a pointer
12607 to a struct line_header, allocated using xmalloc.
12609 NOTE: the strings in the include directory and file name tables of
12610 the returned object point into the dwarf line section buffer,
12611 and must not be freed. */
12613 static struct line_header
*
12614 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
12616 struct cleanup
*back_to
;
12617 struct line_header
*lh
;
12618 gdb_byte
*line_ptr
;
12619 unsigned int bytes_read
, offset_size
;
12621 char *cur_dir
, *cur_file
;
12622 struct dwarf2_section_info
*section
;
12625 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
12627 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
12628 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
12630 section
= &dwarf2_per_objfile
->line
;
12632 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
12633 if (section
->buffer
== NULL
)
12635 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
12636 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
12638 complaint (&symfile_complaints
, _("missing .debug_line section"));
12642 /* We can't do this until we know the section is non-empty.
12643 Only then do we know we have such a section. */
12644 abfd
= section
->asection
->owner
;
12646 /* Make sure that at least there's room for the total_length field.
12647 That could be 12 bytes long, but we're just going to fudge that. */
12648 if (offset
+ 4 >= section
->size
)
12650 dwarf2_statement_list_fits_in_line_number_section_complaint ();
12654 lh
= xmalloc (sizeof (*lh
));
12655 memset (lh
, 0, sizeof (*lh
));
12656 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
12659 line_ptr
= section
->buffer
+ offset
;
12661 /* Read in the header. */
12663 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
12664 &bytes_read
, &offset_size
);
12665 line_ptr
+= bytes_read
;
12666 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
12668 dwarf2_statement_list_fits_in_line_number_section_complaint ();
12671 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
12672 lh
->version
= read_2_bytes (abfd
, line_ptr
);
12674 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
12675 line_ptr
+= offset_size
;
12676 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
12678 if (lh
->version
>= 4)
12680 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
12684 lh
->maximum_ops_per_instruction
= 1;
12686 if (lh
->maximum_ops_per_instruction
== 0)
12688 lh
->maximum_ops_per_instruction
= 1;
12689 complaint (&symfile_complaints
,
12690 _("invalid maximum_ops_per_instruction "
12691 "in `.debug_line' section"));
12694 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
12696 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
12698 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
12700 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
12702 lh
->standard_opcode_lengths
12703 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
12705 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
12706 for (i
= 1; i
< lh
->opcode_base
; ++i
)
12708 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
12712 /* Read directory table. */
12713 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
12715 line_ptr
+= bytes_read
;
12716 add_include_dir (lh
, cur_dir
);
12718 line_ptr
+= bytes_read
;
12720 /* Read file name table. */
12721 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
12723 unsigned int dir_index
, mod_time
, length
;
12725 line_ptr
+= bytes_read
;
12726 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12727 line_ptr
+= bytes_read
;
12728 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12729 line_ptr
+= bytes_read
;
12730 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12731 line_ptr
+= bytes_read
;
12733 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
12735 line_ptr
+= bytes_read
;
12736 lh
->statement_program_start
= line_ptr
;
12738 if (line_ptr
> (section
->buffer
+ section
->size
))
12739 complaint (&symfile_complaints
,
12740 _("line number info header doesn't "
12741 "fit in `.debug_line' section"));
12743 discard_cleanups (back_to
);
12747 /* Subroutine of dwarf_decode_lines to simplify it.
12748 Return the file name of the psymtab for included file FILE_INDEX
12749 in line header LH of PST.
12750 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
12751 If space for the result is malloc'd, it will be freed by a cleanup.
12752 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
12755 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
12756 const struct partial_symtab
*pst
,
12757 const char *comp_dir
)
12759 const struct file_entry fe
= lh
->file_names
[file_index
];
12760 char *include_name
= fe
.name
;
12761 char *include_name_to_compare
= include_name
;
12762 char *dir_name
= NULL
;
12763 const char *pst_filename
;
12764 char *copied_name
= NULL
;
12768 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
12770 if (!IS_ABSOLUTE_PATH (include_name
)
12771 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
12773 /* Avoid creating a duplicate psymtab for PST.
12774 We do this by comparing INCLUDE_NAME and PST_FILENAME.
12775 Before we do the comparison, however, we need to account
12776 for DIR_NAME and COMP_DIR.
12777 First prepend dir_name (if non-NULL). If we still don't
12778 have an absolute path prepend comp_dir (if non-NULL).
12779 However, the directory we record in the include-file's
12780 psymtab does not contain COMP_DIR (to match the
12781 corresponding symtab(s)).
12786 bash$ gcc -g ./hello.c
12787 include_name = "hello.c"
12789 DW_AT_comp_dir = comp_dir = "/tmp"
12790 DW_AT_name = "./hello.c" */
12792 if (dir_name
!= NULL
)
12794 include_name
= concat (dir_name
, SLASH_STRING
,
12795 include_name
, (char *)NULL
);
12796 include_name_to_compare
= include_name
;
12797 make_cleanup (xfree
, include_name
);
12799 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
12801 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
12802 include_name
, (char *)NULL
);
12806 pst_filename
= pst
->filename
;
12807 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
12809 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
12810 pst_filename
, (char *)NULL
);
12811 pst_filename
= copied_name
;
12814 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
12816 if (include_name_to_compare
!= include_name
)
12817 xfree (include_name_to_compare
);
12818 if (copied_name
!= NULL
)
12819 xfree (copied_name
);
12823 return include_name
;
12826 /* Ignore this record_line request. */
12829 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
12834 /* Subroutine of dwarf_decode_lines to simplify it.
12835 Process the line number information in LH. */
12838 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
12839 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
12841 gdb_byte
*line_ptr
, *extended_end
;
12842 gdb_byte
*line_end
;
12843 unsigned int bytes_read
, extended_len
;
12844 unsigned char op_code
, extended_op
, adj_opcode
;
12845 CORE_ADDR baseaddr
;
12846 struct objfile
*objfile
= cu
->objfile
;
12847 bfd
*abfd
= objfile
->obfd
;
12848 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12849 const int decode_for_pst_p
= (pst
!= NULL
);
12850 struct subfile
*last_subfile
= NULL
;
12851 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
12854 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12856 line_ptr
= lh
->statement_program_start
;
12857 line_end
= lh
->statement_program_end
;
12859 /* Read the statement sequences until there's nothing left. */
12860 while (line_ptr
< line_end
)
12862 /* state machine registers */
12863 CORE_ADDR address
= 0;
12864 unsigned int file
= 1;
12865 unsigned int line
= 1;
12866 unsigned int column
= 0;
12867 int is_stmt
= lh
->default_is_stmt
;
12868 int basic_block
= 0;
12869 int end_sequence
= 0;
12871 unsigned char op_index
= 0;
12873 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
12875 /* Start a subfile for the current file of the state machine. */
12876 /* lh->include_dirs and lh->file_names are 0-based, but the
12877 directory and file name numbers in the statement program
12879 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
12883 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
12885 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
12888 /* Decode the table. */
12889 while (!end_sequence
)
12891 op_code
= read_1_byte (abfd
, line_ptr
);
12893 if (line_ptr
> line_end
)
12895 dwarf2_debug_line_missing_end_sequence_complaint ();
12899 if (op_code
>= lh
->opcode_base
)
12901 /* Special operand. */
12902 adj_opcode
= op_code
- lh
->opcode_base
;
12903 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
12904 / lh
->maximum_ops_per_instruction
)
12905 * lh
->minimum_instruction_length
);
12906 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
12907 % lh
->maximum_ops_per_instruction
);
12908 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
12909 if (lh
->num_file_names
< file
|| file
== 0)
12910 dwarf2_debug_line_missing_file_complaint ();
12911 /* For now we ignore lines not starting on an
12912 instruction boundary. */
12913 else if (op_index
== 0)
12915 lh
->file_names
[file
- 1].included_p
= 1;
12916 if (!decode_for_pst_p
&& is_stmt
)
12918 if (last_subfile
!= current_subfile
)
12920 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
12922 (*p_record_line
) (last_subfile
, 0, addr
);
12923 last_subfile
= current_subfile
;
12925 /* Append row to matrix using current values. */
12926 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
12927 (*p_record_line
) (current_subfile
, line
, addr
);
12932 else switch (op_code
)
12934 case DW_LNS_extended_op
:
12935 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
12937 line_ptr
+= bytes_read
;
12938 extended_end
= line_ptr
+ extended_len
;
12939 extended_op
= read_1_byte (abfd
, line_ptr
);
12941 switch (extended_op
)
12943 case DW_LNE_end_sequence
:
12944 p_record_line
= record_line
;
12947 case DW_LNE_set_address
:
12948 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
12950 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12952 /* This line table is for a function which has been
12953 GCd by the linker. Ignore it. PR gdb/12528 */
12956 = line_ptr
- dwarf2_per_objfile
->line
.buffer
;
12958 complaint (&symfile_complaints
,
12959 _(".debug_line address at offset 0x%lx is 0 "
12961 line_offset
, objfile
->name
);
12962 p_record_line
= noop_record_line
;
12966 line_ptr
+= bytes_read
;
12967 address
+= baseaddr
;
12969 case DW_LNE_define_file
:
12972 unsigned int dir_index
, mod_time
, length
;
12974 cur_file
= read_direct_string (abfd
, line_ptr
,
12976 line_ptr
+= bytes_read
;
12978 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12979 line_ptr
+= bytes_read
;
12981 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12982 line_ptr
+= bytes_read
;
12984 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
12985 line_ptr
+= bytes_read
;
12986 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
12989 case DW_LNE_set_discriminator
:
12990 /* The discriminator is not interesting to the debugger;
12992 line_ptr
= extended_end
;
12995 complaint (&symfile_complaints
,
12996 _("mangled .debug_line section"));
12999 /* Make sure that we parsed the extended op correctly. If e.g.
13000 we expected a different address size than the producer used,
13001 we may have read the wrong number of bytes. */
13002 if (line_ptr
!= extended_end
)
13004 complaint (&symfile_complaints
,
13005 _("mangled .debug_line section"));
13010 if (lh
->num_file_names
< file
|| file
== 0)
13011 dwarf2_debug_line_missing_file_complaint ();
13014 lh
->file_names
[file
- 1].included_p
= 1;
13015 if (!decode_for_pst_p
&& is_stmt
)
13017 if (last_subfile
!= current_subfile
)
13019 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13021 (*p_record_line
) (last_subfile
, 0, addr
);
13022 last_subfile
= current_subfile
;
13024 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13025 (*p_record_line
) (current_subfile
, line
, addr
);
13030 case DW_LNS_advance_pc
:
13033 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13035 address
+= (((op_index
+ adjust
)
13036 / lh
->maximum_ops_per_instruction
)
13037 * lh
->minimum_instruction_length
);
13038 op_index
= ((op_index
+ adjust
)
13039 % lh
->maximum_ops_per_instruction
);
13040 line_ptr
+= bytes_read
;
13043 case DW_LNS_advance_line
:
13044 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
13045 line_ptr
+= bytes_read
;
13047 case DW_LNS_set_file
:
13049 /* The arrays lh->include_dirs and lh->file_names are
13050 0-based, but the directory and file name numbers in
13051 the statement program are 1-based. */
13052 struct file_entry
*fe
;
13055 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13056 line_ptr
+= bytes_read
;
13057 if (lh
->num_file_names
< file
|| file
== 0)
13058 dwarf2_debug_line_missing_file_complaint ();
13061 fe
= &lh
->file_names
[file
- 1];
13063 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13064 if (!decode_for_pst_p
)
13066 last_subfile
= current_subfile
;
13067 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13072 case DW_LNS_set_column
:
13073 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13074 line_ptr
+= bytes_read
;
13076 case DW_LNS_negate_stmt
:
13077 is_stmt
= (!is_stmt
);
13079 case DW_LNS_set_basic_block
:
13082 /* Add to the address register of the state machine the
13083 address increment value corresponding to special opcode
13084 255. I.e., this value is scaled by the minimum
13085 instruction length since special opcode 255 would have
13086 scaled the increment. */
13087 case DW_LNS_const_add_pc
:
13089 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
13091 address
+= (((op_index
+ adjust
)
13092 / lh
->maximum_ops_per_instruction
)
13093 * lh
->minimum_instruction_length
);
13094 op_index
= ((op_index
+ adjust
)
13095 % lh
->maximum_ops_per_instruction
);
13098 case DW_LNS_fixed_advance_pc
:
13099 address
+= read_2_bytes (abfd
, line_ptr
);
13105 /* Unknown standard opcode, ignore it. */
13108 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
13110 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
13111 line_ptr
+= bytes_read
;
13116 if (lh
->num_file_names
< file
|| file
== 0)
13117 dwarf2_debug_line_missing_file_complaint ();
13120 lh
->file_names
[file
- 1].included_p
= 1;
13121 if (!decode_for_pst_p
)
13123 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
13124 (*p_record_line
) (current_subfile
, 0, addr
);
13130 /* Decode the Line Number Program (LNP) for the given line_header
13131 structure and CU. The actual information extracted and the type
13132 of structures created from the LNP depends on the value of PST.
13134 1. If PST is NULL, then this procedure uses the data from the program
13135 to create all necessary symbol tables, and their linetables.
13137 2. If PST is not NULL, this procedure reads the program to determine
13138 the list of files included by the unit represented by PST, and
13139 builds all the associated partial symbol tables.
13141 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
13142 It is used for relative paths in the line table.
13143 NOTE: When processing partial symtabs (pst != NULL),
13144 comp_dir == pst->dirname.
13146 NOTE: It is important that psymtabs have the same file name (via strcmp)
13147 as the corresponding symtab. Since COMP_DIR is not used in the name of the
13148 symtab we don't use it in the name of the psymtabs we create.
13149 E.g. expand_line_sal requires this when finding psymtabs to expand.
13150 A good testcase for this is mb-inline.exp. */
13153 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
13154 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
13155 int want_line_info
)
13157 struct objfile
*objfile
= cu
->objfile
;
13158 const int decode_for_pst_p
= (pst
!= NULL
);
13159 struct subfile
*first_subfile
= current_subfile
;
13161 if (want_line_info
)
13162 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
13164 if (decode_for_pst_p
)
13168 /* Now that we're done scanning the Line Header Program, we can
13169 create the psymtab of each included file. */
13170 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
13171 if (lh
->file_names
[file_index
].included_p
== 1)
13173 char *include_name
=
13174 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
13175 if (include_name
!= NULL
)
13176 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
13181 /* Make sure a symtab is created for every file, even files
13182 which contain only variables (i.e. no code with associated
13186 for (i
= 0; i
< lh
->num_file_names
; i
++)
13189 struct file_entry
*fe
;
13191 fe
= &lh
->file_names
[i
];
13193 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13194 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
13196 /* Skip the main file; we don't need it, and it must be
13197 allocated last, so that it will show up before the
13198 non-primary symtabs in the objfile's symtab list. */
13199 if (current_subfile
== first_subfile
)
13202 if (current_subfile
->symtab
== NULL
)
13203 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
13205 fe
->symtab
= current_subfile
->symtab
;
13210 /* Start a subfile for DWARF. FILENAME is the name of the file and
13211 DIRNAME the name of the source directory which contains FILENAME
13212 or NULL if not known. COMP_DIR is the compilation directory for the
13213 linetable's compilation unit or NULL if not known.
13214 This routine tries to keep line numbers from identical absolute and
13215 relative file names in a common subfile.
13217 Using the `list' example from the GDB testsuite, which resides in
13218 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
13219 of /srcdir/list0.c yields the following debugging information for list0.c:
13221 DW_AT_name: /srcdir/list0.c
13222 DW_AT_comp_dir: /compdir
13223 files.files[0].name: list0.h
13224 files.files[0].dir: /srcdir
13225 files.files[1].name: list0.c
13226 files.files[1].dir: /srcdir
13228 The line number information for list0.c has to end up in a single
13229 subfile, so that `break /srcdir/list0.c:1' works as expected.
13230 start_subfile will ensure that this happens provided that we pass the
13231 concatenation of files.files[1].dir and files.files[1].name as the
13235 dwarf2_start_subfile (char *filename
, const char *dirname
,
13236 const char *comp_dir
)
13240 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
13241 `start_symtab' will always pass the contents of DW_AT_comp_dir as
13242 second argument to start_subfile. To be consistent, we do the
13243 same here. In order not to lose the line information directory,
13244 we concatenate it to the filename when it makes sense.
13245 Note that the Dwarf3 standard says (speaking of filenames in line
13246 information): ``The directory index is ignored for file names
13247 that represent full path names''. Thus ignoring dirname in the
13248 `else' branch below isn't an issue. */
13250 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
13251 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
13253 fullname
= filename
;
13255 start_subfile (fullname
, comp_dir
);
13257 if (fullname
!= filename
)
13262 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
13263 struct dwarf2_cu
*cu
)
13265 struct objfile
*objfile
= cu
->objfile
;
13266 struct comp_unit_head
*cu_header
= &cu
->header
;
13268 /* NOTE drow/2003-01-30: There used to be a comment and some special
13269 code here to turn a symbol with DW_AT_external and a
13270 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
13271 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
13272 with some versions of binutils) where shared libraries could have
13273 relocations against symbols in their debug information - the
13274 minimal symbol would have the right address, but the debug info
13275 would not. It's no longer necessary, because we will explicitly
13276 apply relocations when we read in the debug information now. */
13278 /* A DW_AT_location attribute with no contents indicates that a
13279 variable has been optimized away. */
13280 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
13282 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
13286 /* Handle one degenerate form of location expression specially, to
13287 preserve GDB's previous behavior when section offsets are
13288 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
13289 then mark this symbol as LOC_STATIC. */
13291 if (attr_form_is_block (attr
)
13292 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
13293 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
13294 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
13295 && (DW_BLOCK (attr
)->size
13296 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
13298 unsigned int dummy
;
13300 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
13301 SYMBOL_VALUE_ADDRESS (sym
) =
13302 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
13304 SYMBOL_VALUE_ADDRESS (sym
) =
13305 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
13306 SYMBOL_CLASS (sym
) = LOC_STATIC
;
13307 fixup_symbol_section (sym
, objfile
);
13308 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
13309 SYMBOL_SECTION (sym
));
13313 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
13314 expression evaluator, and use LOC_COMPUTED only when necessary
13315 (i.e. when the value of a register or memory location is
13316 referenced, or a thread-local block, etc.). Then again, it might
13317 not be worthwhile. I'm assuming that it isn't unless performance
13318 or memory numbers show me otherwise. */
13320 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
13321 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
13323 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
13324 cu
->has_loclist
= 1;
13327 /* Given a pointer to a DWARF information entry, figure out if we need
13328 to make a symbol table entry for it, and if so, create a new entry
13329 and return a pointer to it.
13330 If TYPE is NULL, determine symbol type from the die, otherwise
13331 used the passed type.
13332 If SPACE is not NULL, use it to hold the new symbol. If it is
13333 NULL, allocate a new symbol on the objfile's obstack. */
13335 static struct symbol
*
13336 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
13337 struct symbol
*space
)
13339 struct objfile
*objfile
= cu
->objfile
;
13340 struct symbol
*sym
= NULL
;
13342 struct attribute
*attr
= NULL
;
13343 struct attribute
*attr2
= NULL
;
13344 CORE_ADDR baseaddr
;
13345 struct pending
**list_to_add
= NULL
;
13347 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13349 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13351 name
= dwarf2_name (die
, cu
);
13354 const char *linkagename
;
13355 int suppress_add
= 0;
13360 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
13361 OBJSTAT (objfile
, n_syms
++);
13363 /* Cache this symbol's name and the name's demangled form (if any). */
13364 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
13365 linkagename
= dwarf2_physname (name
, die
, cu
);
13366 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
13368 /* Fortran does not have mangling standard and the mangling does differ
13369 between gfortran, iFort etc. */
13370 if (cu
->language
== language_fortran
13371 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
13372 symbol_set_demangled_name (&(sym
->ginfo
),
13373 (char *) dwarf2_full_name (name
, die
, cu
),
13376 /* Default assumptions.
13377 Use the passed type or decode it from the die. */
13378 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13379 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
13381 SYMBOL_TYPE (sym
) = type
;
13383 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
13384 attr
= dwarf2_attr (die
,
13385 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
13389 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
13392 attr
= dwarf2_attr (die
,
13393 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
13397 int file_index
= DW_UNSND (attr
);
13399 if (cu
->line_header
== NULL
13400 || file_index
> cu
->line_header
->num_file_names
)
13401 complaint (&symfile_complaints
,
13402 _("file index out of range"));
13403 else if (file_index
> 0)
13405 struct file_entry
*fe
;
13407 fe
= &cu
->line_header
->file_names
[file_index
- 1];
13408 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
13415 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13418 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
13420 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
13421 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
13422 SYMBOL_CLASS (sym
) = LOC_LABEL
;
13423 add_symbol_to_list (sym
, cu
->list_in_scope
);
13425 case DW_TAG_subprogram
:
13426 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
13428 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
13429 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13430 if ((attr2
&& (DW_UNSND (attr2
) != 0))
13431 || cu
->language
== language_ada
)
13433 /* Subprograms marked external are stored as a global symbol.
13434 Ada subprograms, whether marked external or not, are always
13435 stored as a global symbol, because we want to be able to
13436 access them globally. For instance, we want to be able
13437 to break on a nested subprogram without having to
13438 specify the context. */
13439 list_to_add
= &global_symbols
;
13443 list_to_add
= cu
->list_in_scope
;
13446 case DW_TAG_inlined_subroutine
:
13447 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
13449 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
13450 SYMBOL_INLINED (sym
) = 1;
13451 list_to_add
= cu
->list_in_scope
;
13453 case DW_TAG_template_value_param
:
13455 /* Fall through. */
13456 case DW_TAG_constant
:
13457 case DW_TAG_variable
:
13458 case DW_TAG_member
:
13459 /* Compilation with minimal debug info may result in
13460 variables with missing type entries. Change the
13461 misleading `void' type to something sensible. */
13462 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
13464 = objfile_type (objfile
)->nodebug_data_symbol
;
13466 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13467 /* In the case of DW_TAG_member, we should only be called for
13468 static const members. */
13469 if (die
->tag
== DW_TAG_member
)
13471 /* dwarf2_add_field uses die_is_declaration,
13472 so we do the same. */
13473 gdb_assert (die_is_declaration (die
, cu
));
13478 dwarf2_const_value (attr
, sym
, cu
);
13479 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13482 if (attr2
&& (DW_UNSND (attr2
) != 0))
13483 list_to_add
= &global_symbols
;
13485 list_to_add
= cu
->list_in_scope
;
13489 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13492 var_decode_location (attr
, sym
, cu
);
13493 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13494 if (SYMBOL_CLASS (sym
) == LOC_STATIC
13495 && SYMBOL_VALUE_ADDRESS (sym
) == 0
13496 && !dwarf2_per_objfile
->has_section_at_zero
)
13498 /* When a static variable is eliminated by the linker,
13499 the corresponding debug information is not stripped
13500 out, but the variable address is set to null;
13501 do not add such variables into symbol table. */
13503 else if (attr2
&& (DW_UNSND (attr2
) != 0))
13505 /* Workaround gfortran PR debug/40040 - it uses
13506 DW_AT_location for variables in -fPIC libraries which may
13507 get overriden by other libraries/executable and get
13508 a different address. Resolve it by the minimal symbol
13509 which may come from inferior's executable using copy
13510 relocation. Make this workaround only for gfortran as for
13511 other compilers GDB cannot guess the minimal symbol
13512 Fortran mangling kind. */
13513 if (cu
->language
== language_fortran
&& die
->parent
13514 && die
->parent
->tag
== DW_TAG_module
13516 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
13517 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
13519 /* A variable with DW_AT_external is never static,
13520 but it may be block-scoped. */
13521 list_to_add
= (cu
->list_in_scope
== &file_symbols
13522 ? &global_symbols
: cu
->list_in_scope
);
13525 list_to_add
= cu
->list_in_scope
;
13529 /* We do not know the address of this symbol.
13530 If it is an external symbol and we have type information
13531 for it, enter the symbol as a LOC_UNRESOLVED symbol.
13532 The address of the variable will then be determined from
13533 the minimal symbol table whenever the variable is
13535 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
13536 if (attr2
&& (DW_UNSND (attr2
) != 0)
13537 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
13539 /* A variable with DW_AT_external is never static, but it
13540 may be block-scoped. */
13541 list_to_add
= (cu
->list_in_scope
== &file_symbols
13542 ? &global_symbols
: cu
->list_in_scope
);
13544 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
13546 else if (!die_is_declaration (die
, cu
))
13548 /* Use the default LOC_OPTIMIZED_OUT class. */
13549 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
13551 list_to_add
= cu
->list_in_scope
;
13555 case DW_TAG_formal_parameter
:
13556 /* If we are inside a function, mark this as an argument. If
13557 not, we might be looking at an argument to an inlined function
13558 when we do not have enough information to show inlined frames;
13559 pretend it's a local variable in that case so that the user can
13561 if (context_stack_depth
> 0
13562 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
13563 SYMBOL_IS_ARGUMENT (sym
) = 1;
13564 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13567 var_decode_location (attr
, sym
, cu
);
13569 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13572 dwarf2_const_value (attr
, sym
, cu
);
13575 list_to_add
= cu
->list_in_scope
;
13577 case DW_TAG_unspecified_parameters
:
13578 /* From varargs functions; gdb doesn't seem to have any
13579 interest in this information, so just ignore it for now.
13582 case DW_TAG_template_type_param
:
13584 /* Fall through. */
13585 case DW_TAG_class_type
:
13586 case DW_TAG_interface_type
:
13587 case DW_TAG_structure_type
:
13588 case DW_TAG_union_type
:
13589 case DW_TAG_set_type
:
13590 case DW_TAG_enumeration_type
:
13591 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13592 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
13595 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
13596 really ever be static objects: otherwise, if you try
13597 to, say, break of a class's method and you're in a file
13598 which doesn't mention that class, it won't work unless
13599 the check for all static symbols in lookup_symbol_aux
13600 saves you. See the OtherFileClass tests in
13601 gdb.c++/namespace.exp. */
13605 list_to_add
= (cu
->list_in_scope
== &file_symbols
13606 && (cu
->language
== language_cplus
13607 || cu
->language
== language_java
)
13608 ? &global_symbols
: cu
->list_in_scope
);
13610 /* The semantics of C++ state that "struct foo {
13611 ... }" also defines a typedef for "foo". A Java
13612 class declaration also defines a typedef for the
13614 if (cu
->language
== language_cplus
13615 || cu
->language
== language_java
13616 || cu
->language
== language_ada
)
13618 /* The symbol's name is already allocated along
13619 with this objfile, so we don't need to
13620 duplicate it for the type. */
13621 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
13622 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
13627 case DW_TAG_typedef
:
13628 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13629 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13630 list_to_add
= cu
->list_in_scope
;
13632 case DW_TAG_base_type
:
13633 case DW_TAG_subrange_type
:
13634 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13635 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
13636 list_to_add
= cu
->list_in_scope
;
13638 case DW_TAG_enumerator
:
13639 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13642 dwarf2_const_value (attr
, sym
, cu
);
13645 /* NOTE: carlton/2003-11-10: See comment above in the
13646 DW_TAG_class_type, etc. block. */
13648 list_to_add
= (cu
->list_in_scope
== &file_symbols
13649 && (cu
->language
== language_cplus
13650 || cu
->language
== language_java
)
13651 ? &global_symbols
: cu
->list_in_scope
);
13654 case DW_TAG_namespace
:
13655 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
13656 list_to_add
= &global_symbols
;
13659 /* Not a tag we recognize. Hopefully we aren't processing
13660 trash data, but since we must specifically ignore things
13661 we don't recognize, there is nothing else we should do at
13663 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
13664 dwarf_tag_name (die
->tag
));
13670 sym
->hash_next
= objfile
->template_symbols
;
13671 objfile
->template_symbols
= sym
;
13672 list_to_add
= NULL
;
13675 if (list_to_add
!= NULL
)
13676 add_symbol_to_list (sym
, list_to_add
);
13678 /* For the benefit of old versions of GCC, check for anonymous
13679 namespaces based on the demangled name. */
13680 if (!processing_has_namespace_info
13681 && cu
->language
== language_cplus
)
13682 cp_scan_for_anonymous_namespaces (sym
, objfile
);
13687 /* A wrapper for new_symbol_full that always allocates a new symbol. */
13689 static struct symbol
*
13690 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
13692 return new_symbol_full (die
, type
, cu
, NULL
);
13695 /* Given an attr with a DW_FORM_dataN value in host byte order,
13696 zero-extend it as appropriate for the symbol's type. The DWARF
13697 standard (v4) is not entirely clear about the meaning of using
13698 DW_FORM_dataN for a constant with a signed type, where the type is
13699 wider than the data. The conclusion of a discussion on the DWARF
13700 list was that this is unspecified. We choose to always zero-extend
13701 because that is the interpretation long in use by GCC. */
13704 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
13705 const char *name
, struct obstack
*obstack
,
13706 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
13708 struct objfile
*objfile
= cu
->objfile
;
13709 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
13710 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
13711 LONGEST l
= DW_UNSND (attr
);
13713 if (bits
< sizeof (*value
) * 8)
13715 l
&= ((LONGEST
) 1 << bits
) - 1;
13718 else if (bits
== sizeof (*value
) * 8)
13722 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
13723 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
13730 /* Read a constant value from an attribute. Either set *VALUE, or if
13731 the value does not fit in *VALUE, set *BYTES - either already
13732 allocated on the objfile obstack, or newly allocated on OBSTACK,
13733 or, set *BATON, if we translated the constant to a location
13737 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
13738 const char *name
, struct obstack
*obstack
,
13739 struct dwarf2_cu
*cu
,
13740 LONGEST
*value
, gdb_byte
**bytes
,
13741 struct dwarf2_locexpr_baton
**baton
)
13743 struct objfile
*objfile
= cu
->objfile
;
13744 struct comp_unit_head
*cu_header
= &cu
->header
;
13745 struct dwarf_block
*blk
;
13746 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
13747 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
13753 switch (attr
->form
)
13756 case DW_FORM_GNU_addr_index
:
13760 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
13761 dwarf2_const_value_length_mismatch_complaint (name
,
13762 cu_header
->addr_size
,
13763 TYPE_LENGTH (type
));
13764 /* Symbols of this form are reasonably rare, so we just
13765 piggyback on the existing location code rather than writing
13766 a new implementation of symbol_computed_ops. */
13767 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
13768 sizeof (struct dwarf2_locexpr_baton
));
13769 (*baton
)->per_cu
= cu
->per_cu
;
13770 gdb_assert ((*baton
)->per_cu
);
13772 (*baton
)->size
= 2 + cu_header
->addr_size
;
13773 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
13774 (*baton
)->data
= data
;
13776 data
[0] = DW_OP_addr
;
13777 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
13778 byte_order
, DW_ADDR (attr
));
13779 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
13782 case DW_FORM_string
:
13784 case DW_FORM_GNU_str_index
:
13785 /* DW_STRING is already allocated on the objfile obstack, point
13787 *bytes
= (gdb_byte
*) DW_STRING (attr
);
13789 case DW_FORM_block1
:
13790 case DW_FORM_block2
:
13791 case DW_FORM_block4
:
13792 case DW_FORM_block
:
13793 case DW_FORM_exprloc
:
13794 blk
= DW_BLOCK (attr
);
13795 if (TYPE_LENGTH (type
) != blk
->size
)
13796 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
13797 TYPE_LENGTH (type
));
13798 *bytes
= blk
->data
;
13801 /* The DW_AT_const_value attributes are supposed to carry the
13802 symbol's value "represented as it would be on the target
13803 architecture." By the time we get here, it's already been
13804 converted to host endianness, so we just need to sign- or
13805 zero-extend it as appropriate. */
13806 case DW_FORM_data1
:
13807 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13808 obstack
, cu
, value
, 8);
13810 case DW_FORM_data2
:
13811 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13812 obstack
, cu
, value
, 16);
13814 case DW_FORM_data4
:
13815 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13816 obstack
, cu
, value
, 32);
13818 case DW_FORM_data8
:
13819 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
13820 obstack
, cu
, value
, 64);
13823 case DW_FORM_sdata
:
13824 *value
= DW_SND (attr
);
13827 case DW_FORM_udata
:
13828 *value
= DW_UNSND (attr
);
13832 complaint (&symfile_complaints
,
13833 _("unsupported const value attribute form: '%s'"),
13834 dwarf_form_name (attr
->form
));
13841 /* Copy constant value from an attribute to a symbol. */
13844 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
13845 struct dwarf2_cu
*cu
)
13847 struct objfile
*objfile
= cu
->objfile
;
13848 struct comp_unit_head
*cu_header
= &cu
->header
;
13851 struct dwarf2_locexpr_baton
*baton
;
13853 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
13854 SYMBOL_PRINT_NAME (sym
),
13855 &objfile
->objfile_obstack
, cu
,
13856 &value
, &bytes
, &baton
);
13860 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
13861 SYMBOL_LOCATION_BATON (sym
) = baton
;
13862 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
13864 else if (bytes
!= NULL
)
13866 SYMBOL_VALUE_BYTES (sym
) = bytes
;
13867 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
13871 SYMBOL_VALUE (sym
) = value
;
13872 SYMBOL_CLASS (sym
) = LOC_CONST
;
13876 /* Return the type of the die in question using its DW_AT_type attribute. */
13878 static struct type
*
13879 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13881 struct attribute
*type_attr
;
13883 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13886 /* A missing DW_AT_type represents a void type. */
13887 return objfile_type (cu
->objfile
)->builtin_void
;
13890 return lookup_die_type (die
, type_attr
, cu
);
13893 /* True iff CU's producer generates GNAT Ada auxiliary information
13894 that allows to find parallel types through that information instead
13895 of having to do expensive parallel lookups by type name. */
13898 need_gnat_info (struct dwarf2_cu
*cu
)
13900 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
13901 of GNAT produces this auxiliary information, without any indication
13902 that it is produced. Part of enhancing the FSF version of GNAT
13903 to produce that information will be to put in place an indicator
13904 that we can use in order to determine whether the descriptive type
13905 info is available or not. One suggestion that has been made is
13906 to use a new attribute, attached to the CU die. For now, assume
13907 that the descriptive type info is not available. */
13911 /* Return the auxiliary type of the die in question using its
13912 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
13913 attribute is not present. */
13915 static struct type
*
13916 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13918 struct attribute
*type_attr
;
13920 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
13924 return lookup_die_type (die
, type_attr
, cu
);
13927 /* If DIE has a descriptive_type attribute, then set the TYPE's
13928 descriptive type accordingly. */
13931 set_descriptive_type (struct type
*type
, struct die_info
*die
,
13932 struct dwarf2_cu
*cu
)
13934 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
13936 if (descriptive_type
)
13938 ALLOCATE_GNAT_AUX_TYPE (type
);
13939 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
13943 /* Return the containing type of the die in question using its
13944 DW_AT_containing_type attribute. */
13946 static struct type
*
13947 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13949 struct attribute
*type_attr
;
13951 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
13953 error (_("Dwarf Error: Problem turning containing type into gdb type "
13954 "[in module %s]"), cu
->objfile
->name
);
13956 return lookup_die_type (die
, type_attr
, cu
);
13959 /* Look up the type of DIE in CU using its type attribute ATTR.
13960 If there is no type substitute an error marker. */
13962 static struct type
*
13963 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
13964 struct dwarf2_cu
*cu
)
13966 struct objfile
*objfile
= cu
->objfile
;
13967 struct type
*this_type
;
13969 /* First see if we have it cached. */
13971 if (is_ref_attr (attr
))
13973 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
13975 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
13977 else if (attr
->form
== DW_FORM_ref_sig8
)
13979 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
13981 /* sig_type will be NULL if the signatured type is missing from
13983 if (sig_type
== NULL
)
13984 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13985 "at 0x%x [in module %s]"),
13986 die
->offset
.sect_off
, objfile
->name
);
13988 gdb_assert (sig_type
->per_cu
.is_debug_types
);
13989 /* If we haven't filled in type_offset_in_section yet, then we
13990 haven't read the type in yet. */
13992 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
13995 get_die_type_at_offset (sig_type
->type_offset_in_section
,
13996 &sig_type
->per_cu
);
14001 dump_die_for_error (die
);
14002 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
14003 dwarf_attr_name (attr
->name
), objfile
->name
);
14006 /* If not cached we need to read it in. */
14008 if (this_type
== NULL
)
14010 struct die_info
*type_die
;
14011 struct dwarf2_cu
*type_cu
= cu
;
14013 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
14014 /* If we found the type now, it's probably because the type came
14015 from an inter-CU reference and the type's CU got expanded before
14017 this_type
= get_die_type (type_die
, type_cu
);
14018 if (this_type
== NULL
)
14019 this_type
= read_type_die_1 (type_die
, type_cu
);
14022 /* If we still don't have a type use an error marker. */
14024 if (this_type
== NULL
)
14026 char *message
, *saved
;
14028 /* read_type_die already issued a complaint. */
14029 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
14031 cu
->header
.offset
.sect_off
,
14032 die
->offset
.sect_off
);
14033 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
14034 message
, strlen (message
));
14037 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
14043 /* Return the type in DIE, CU.
14044 Returns NULL for invalid types.
14046 This first does a lookup in the appropriate type_hash table,
14047 and only reads the die in if necessary.
14049 NOTE: This can be called when reading in partial or full symbols. */
14051 static struct type
*
14052 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
14054 struct type
*this_type
;
14056 this_type
= get_die_type (die
, cu
);
14060 return read_type_die_1 (die
, cu
);
14063 /* Read the type in DIE, CU.
14064 Returns NULL for invalid types. */
14066 static struct type
*
14067 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
14069 struct type
*this_type
= NULL
;
14073 case DW_TAG_class_type
:
14074 case DW_TAG_interface_type
:
14075 case DW_TAG_structure_type
:
14076 case DW_TAG_union_type
:
14077 this_type
= read_structure_type (die
, cu
);
14079 case DW_TAG_enumeration_type
:
14080 this_type
= read_enumeration_type (die
, cu
);
14082 case DW_TAG_subprogram
:
14083 case DW_TAG_subroutine_type
:
14084 case DW_TAG_inlined_subroutine
:
14085 this_type
= read_subroutine_type (die
, cu
);
14087 case DW_TAG_array_type
:
14088 this_type
= read_array_type (die
, cu
);
14090 case DW_TAG_set_type
:
14091 this_type
= read_set_type (die
, cu
);
14093 case DW_TAG_pointer_type
:
14094 this_type
= read_tag_pointer_type (die
, cu
);
14096 case DW_TAG_ptr_to_member_type
:
14097 this_type
= read_tag_ptr_to_member_type (die
, cu
);
14099 case DW_TAG_reference_type
:
14100 this_type
= read_tag_reference_type (die
, cu
);
14102 case DW_TAG_const_type
:
14103 this_type
= read_tag_const_type (die
, cu
);
14105 case DW_TAG_volatile_type
:
14106 this_type
= read_tag_volatile_type (die
, cu
);
14108 case DW_TAG_string_type
:
14109 this_type
= read_tag_string_type (die
, cu
);
14111 case DW_TAG_typedef
:
14112 this_type
= read_typedef (die
, cu
);
14114 case DW_TAG_subrange_type
:
14115 this_type
= read_subrange_type (die
, cu
);
14117 case DW_TAG_base_type
:
14118 this_type
= read_base_type (die
, cu
);
14120 case DW_TAG_unspecified_type
:
14121 this_type
= read_unspecified_type (die
, cu
);
14123 case DW_TAG_namespace
:
14124 this_type
= read_namespace_type (die
, cu
);
14126 case DW_TAG_module
:
14127 this_type
= read_module_type (die
, cu
);
14130 complaint (&symfile_complaints
,
14131 _("unexpected tag in read_type_die: '%s'"),
14132 dwarf_tag_name (die
->tag
));
14139 /* See if we can figure out if the class lives in a namespace. We do
14140 this by looking for a member function; its demangled name will
14141 contain namespace info, if there is any.
14142 Return the computed name or NULL.
14143 Space for the result is allocated on the objfile's obstack.
14144 This is the full-die version of guess_partial_die_structure_name.
14145 In this case we know DIE has no useful parent. */
14148 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
14150 struct die_info
*spec_die
;
14151 struct dwarf2_cu
*spec_cu
;
14152 struct die_info
*child
;
14155 spec_die
= die_specification (die
, &spec_cu
);
14156 if (spec_die
!= NULL
)
14162 for (child
= die
->child
;
14164 child
= child
->sibling
)
14166 if (child
->tag
== DW_TAG_subprogram
)
14168 struct attribute
*attr
;
14170 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
14172 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
14176 = language_class_name_from_physname (cu
->language_defn
,
14180 if (actual_name
!= NULL
)
14182 char *die_name
= dwarf2_name (die
, cu
);
14184 if (die_name
!= NULL
14185 && strcmp (die_name
, actual_name
) != 0)
14187 /* Strip off the class name from the full name.
14188 We want the prefix. */
14189 int die_name_len
= strlen (die_name
);
14190 int actual_name_len
= strlen (actual_name
);
14192 /* Test for '::' as a sanity check. */
14193 if (actual_name_len
> die_name_len
+ 2
14194 && actual_name
[actual_name_len
14195 - die_name_len
- 1] == ':')
14197 obsavestring (actual_name
,
14198 actual_name_len
- die_name_len
- 2,
14199 &cu
->objfile
->objfile_obstack
);
14202 xfree (actual_name
);
14211 /* GCC might emit a nameless typedef that has a linkage name. Determine the
14212 prefix part in such case. See
14213 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14216 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
14218 struct attribute
*attr
;
14221 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
14222 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
14225 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14226 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
14229 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
14231 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
14232 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
14235 /* dwarf2_name had to be already called. */
14236 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
14238 /* Strip the base name, keep any leading namespaces/classes. */
14239 base
= strrchr (DW_STRING (attr
), ':');
14240 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
14243 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
14244 &cu
->objfile
->objfile_obstack
);
14247 /* Return the name of the namespace/class that DIE is defined within,
14248 or "" if we can't tell. The caller should not xfree the result.
14250 For example, if we're within the method foo() in the following
14260 then determine_prefix on foo's die will return "N::C". */
14262 static const char *
14263 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
14265 struct die_info
*parent
, *spec_die
;
14266 struct dwarf2_cu
*spec_cu
;
14267 struct type
*parent_type
;
14270 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
14271 && cu
->language
!= language_fortran
)
14274 retval
= anonymous_struct_prefix (die
, cu
);
14278 /* We have to be careful in the presence of DW_AT_specification.
14279 For example, with GCC 3.4, given the code
14283 // Definition of N::foo.
14287 then we'll have a tree of DIEs like this:
14289 1: DW_TAG_compile_unit
14290 2: DW_TAG_namespace // N
14291 3: DW_TAG_subprogram // declaration of N::foo
14292 4: DW_TAG_subprogram // definition of N::foo
14293 DW_AT_specification // refers to die #3
14295 Thus, when processing die #4, we have to pretend that we're in
14296 the context of its DW_AT_specification, namely the contex of die
14299 spec_die
= die_specification (die
, &spec_cu
);
14300 if (spec_die
== NULL
)
14301 parent
= die
->parent
;
14304 parent
= spec_die
->parent
;
14308 if (parent
== NULL
)
14310 else if (parent
->building_fullname
)
14313 const char *parent_name
;
14315 /* It has been seen on RealView 2.2 built binaries,
14316 DW_TAG_template_type_param types actually _defined_ as
14317 children of the parent class:
14320 template class <class Enum> Class{};
14321 Class<enum E> class_e;
14323 1: DW_TAG_class_type (Class)
14324 2: DW_TAG_enumeration_type (E)
14325 3: DW_TAG_enumerator (enum1:0)
14326 3: DW_TAG_enumerator (enum2:1)
14328 2: DW_TAG_template_type_param
14329 DW_AT_type DW_FORM_ref_udata (E)
14331 Besides being broken debug info, it can put GDB into an
14332 infinite loop. Consider:
14334 When we're building the full name for Class<E>, we'll start
14335 at Class, and go look over its template type parameters,
14336 finding E. We'll then try to build the full name of E, and
14337 reach here. We're now trying to build the full name of E,
14338 and look over the parent DIE for containing scope. In the
14339 broken case, if we followed the parent DIE of E, we'd again
14340 find Class, and once again go look at its template type
14341 arguments, etc., etc. Simply don't consider such parent die
14342 as source-level parent of this die (it can't be, the language
14343 doesn't allow it), and break the loop here. */
14344 name
= dwarf2_name (die
, cu
);
14345 parent_name
= dwarf2_name (parent
, cu
);
14346 complaint (&symfile_complaints
,
14347 _("template param type '%s' defined within parent '%s'"),
14348 name
? name
: "<unknown>",
14349 parent_name
? parent_name
: "<unknown>");
14353 switch (parent
->tag
)
14355 case DW_TAG_namespace
:
14356 parent_type
= read_type_die (parent
, cu
);
14357 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
14358 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
14359 Work around this problem here. */
14360 if (cu
->language
== language_cplus
14361 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
14363 /* We give a name to even anonymous namespaces. */
14364 return TYPE_TAG_NAME (parent_type
);
14365 case DW_TAG_class_type
:
14366 case DW_TAG_interface_type
:
14367 case DW_TAG_structure_type
:
14368 case DW_TAG_union_type
:
14369 case DW_TAG_module
:
14370 parent_type
= read_type_die (parent
, cu
);
14371 if (TYPE_TAG_NAME (parent_type
) != NULL
)
14372 return TYPE_TAG_NAME (parent_type
);
14374 /* An anonymous structure is only allowed non-static data
14375 members; no typedefs, no member functions, et cetera.
14376 So it does not need a prefix. */
14378 case DW_TAG_compile_unit
:
14379 case DW_TAG_partial_unit
:
14380 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
14381 if (cu
->language
== language_cplus
14382 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
14383 && die
->child
!= NULL
14384 && (die
->tag
== DW_TAG_class_type
14385 || die
->tag
== DW_TAG_structure_type
14386 || die
->tag
== DW_TAG_union_type
))
14388 char *name
= guess_full_die_structure_name (die
, cu
);
14394 return determine_prefix (parent
, cu
);
14398 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
14399 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
14400 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
14401 an obconcat, otherwise allocate storage for the result. The CU argument is
14402 used to determine the language and hence, the appropriate separator. */
14404 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
14407 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
14408 int physname
, struct dwarf2_cu
*cu
)
14410 const char *lead
= "";
14413 if (suffix
== NULL
|| suffix
[0] == '\0'
14414 || prefix
== NULL
|| prefix
[0] == '\0')
14416 else if (cu
->language
== language_java
)
14418 else if (cu
->language
== language_fortran
&& physname
)
14420 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
14421 DW_AT_MIPS_linkage_name is preferred and used instead. */
14429 if (prefix
== NULL
)
14431 if (suffix
== NULL
)
14437 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
14439 strcpy (retval
, lead
);
14440 strcat (retval
, prefix
);
14441 strcat (retval
, sep
);
14442 strcat (retval
, suffix
);
14447 /* We have an obstack. */
14448 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
14452 /* Return sibling of die, NULL if no sibling. */
14454 static struct die_info
*
14455 sibling_die (struct die_info
*die
)
14457 return die
->sibling
;
14460 /* Get name of a die, return NULL if not found. */
14463 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
14464 struct obstack
*obstack
)
14466 if (name
&& cu
->language
== language_cplus
)
14468 char *canon_name
= cp_canonicalize_string (name
);
14470 if (canon_name
!= NULL
)
14472 if (strcmp (canon_name
, name
) != 0)
14473 name
= obsavestring (canon_name
, strlen (canon_name
),
14475 xfree (canon_name
);
14482 /* Get name of a die, return NULL if not found. */
14485 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
14487 struct attribute
*attr
;
14489 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
14490 if ((!attr
|| !DW_STRING (attr
))
14491 && die
->tag
!= DW_TAG_class_type
14492 && die
->tag
!= DW_TAG_interface_type
14493 && die
->tag
!= DW_TAG_structure_type
14494 && die
->tag
!= DW_TAG_union_type
)
14499 case DW_TAG_compile_unit
:
14500 case DW_TAG_partial_unit
:
14501 /* Compilation units have a DW_AT_name that is a filename, not
14502 a source language identifier. */
14503 case DW_TAG_enumeration_type
:
14504 case DW_TAG_enumerator
:
14505 /* These tags always have simple identifiers already; no need
14506 to canonicalize them. */
14507 return DW_STRING (attr
);
14509 case DW_TAG_subprogram
:
14510 /* Java constructors will all be named "<init>", so return
14511 the class name when we see this special case. */
14512 if (cu
->language
== language_java
14513 && DW_STRING (attr
) != NULL
14514 && strcmp (DW_STRING (attr
), "<init>") == 0)
14516 struct dwarf2_cu
*spec_cu
= cu
;
14517 struct die_info
*spec_die
;
14519 /* GCJ will output '<init>' for Java constructor names.
14520 For this special case, return the name of the parent class. */
14522 /* GCJ may output suprogram DIEs with AT_specification set.
14523 If so, use the name of the specified DIE. */
14524 spec_die
= die_specification (die
, &spec_cu
);
14525 if (spec_die
!= NULL
)
14526 return dwarf2_name (spec_die
, spec_cu
);
14531 if (die
->tag
== DW_TAG_class_type
)
14532 return dwarf2_name (die
, cu
);
14534 while (die
->tag
!= DW_TAG_compile_unit
14535 && die
->tag
!= DW_TAG_partial_unit
);
14539 case DW_TAG_class_type
:
14540 case DW_TAG_interface_type
:
14541 case DW_TAG_structure_type
:
14542 case DW_TAG_union_type
:
14543 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
14544 structures or unions. These were of the form "._%d" in GCC 4.1,
14545 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
14546 and GCC 4.4. We work around this problem by ignoring these. */
14547 if (attr
&& DW_STRING (attr
)
14548 && (strncmp (DW_STRING (attr
), "._", 2) == 0
14549 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
14552 /* GCC might emit a nameless typedef that has a linkage name. See
14553 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
14554 if (!attr
|| DW_STRING (attr
) == NULL
)
14556 char *demangled
= NULL
;
14558 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
14560 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
14562 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
14565 /* Avoid demangling DW_STRING (attr) the second time on a second
14566 call for the same DIE. */
14567 if (!DW_STRING_IS_CANONICAL (attr
))
14568 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
14574 /* FIXME: we already did this for the partial symbol... */
14575 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
14576 &cu
->objfile
->objfile_obstack
);
14577 DW_STRING_IS_CANONICAL (attr
) = 1;
14580 /* Strip any leading namespaces/classes, keep only the base name.
14581 DW_AT_name for named DIEs does not contain the prefixes. */
14582 base
= strrchr (DW_STRING (attr
), ':');
14583 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
14586 return DW_STRING (attr
);
14595 if (!DW_STRING_IS_CANONICAL (attr
))
14598 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
14599 &cu
->objfile
->objfile_obstack
);
14600 DW_STRING_IS_CANONICAL (attr
) = 1;
14602 return DW_STRING (attr
);
14605 /* Return the die that this die in an extension of, or NULL if there
14606 is none. *EXT_CU is the CU containing DIE on input, and the CU
14607 containing the return value on output. */
14609 static struct die_info
*
14610 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
14612 struct attribute
*attr
;
14614 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
14618 return follow_die_ref (die
, attr
, ext_cu
);
14621 /* Convert a DIE tag into its string name. */
14623 static const char *
14624 dwarf_tag_name (unsigned tag
)
14626 const char *name
= get_DW_TAG_name (tag
);
14629 return "DW_TAG_<unknown>";
14634 /* Convert a DWARF attribute code into its string name. */
14636 static const char *
14637 dwarf_attr_name (unsigned attr
)
14641 #ifdef MIPS /* collides with DW_AT_HP_block_index */
14642 if (attr
== DW_AT_MIPS_fde
)
14643 return "DW_AT_MIPS_fde";
14645 if (attr
== DW_AT_HP_block_index
)
14646 return "DW_AT_HP_block_index";
14649 name
= get_DW_AT_name (attr
);
14652 return "DW_AT_<unknown>";
14657 /* Convert a DWARF value form code into its string name. */
14659 static const char *
14660 dwarf_form_name (unsigned form
)
14662 const char *name
= get_DW_FORM_name (form
);
14665 return "DW_FORM_<unknown>";
14671 dwarf_bool_name (unsigned mybool
)
14679 /* Convert a DWARF type code into its string name. */
14681 static const char *
14682 dwarf_type_encoding_name (unsigned enc
)
14684 const char *name
= get_DW_ATE_name (enc
);
14687 return "DW_ATE_<unknown>";
14693 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
14697 print_spaces (indent
, f
);
14698 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
14699 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
14701 if (die
->parent
!= NULL
)
14703 print_spaces (indent
, f
);
14704 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
14705 die
->parent
->offset
.sect_off
);
14708 print_spaces (indent
, f
);
14709 fprintf_unfiltered (f
, " has children: %s\n",
14710 dwarf_bool_name (die
->child
!= NULL
));
14712 print_spaces (indent
, f
);
14713 fprintf_unfiltered (f
, " attributes:\n");
14715 for (i
= 0; i
< die
->num_attrs
; ++i
)
14717 print_spaces (indent
, f
);
14718 fprintf_unfiltered (f
, " %s (%s) ",
14719 dwarf_attr_name (die
->attrs
[i
].name
),
14720 dwarf_form_name (die
->attrs
[i
].form
));
14722 switch (die
->attrs
[i
].form
)
14725 case DW_FORM_GNU_addr_index
:
14726 fprintf_unfiltered (f
, "address: ");
14727 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
14729 case DW_FORM_block2
:
14730 case DW_FORM_block4
:
14731 case DW_FORM_block
:
14732 case DW_FORM_block1
:
14733 fprintf_unfiltered (f
, "block: size %d",
14734 DW_BLOCK (&die
->attrs
[i
])->size
);
14736 case DW_FORM_exprloc
:
14737 fprintf_unfiltered (f
, "expression: size %u",
14738 DW_BLOCK (&die
->attrs
[i
])->size
);
14740 case DW_FORM_ref_addr
:
14741 fprintf_unfiltered (f
, "ref address: ");
14742 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
14748 case DW_FORM_ref_udata
:
14749 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
14750 (long) (DW_UNSND (&die
->attrs
[i
])));
14752 case DW_FORM_data1
:
14753 case DW_FORM_data2
:
14754 case DW_FORM_data4
:
14755 case DW_FORM_data8
:
14756 case DW_FORM_udata
:
14757 case DW_FORM_sdata
:
14758 fprintf_unfiltered (f
, "constant: %s",
14759 pulongest (DW_UNSND (&die
->attrs
[i
])));
14761 case DW_FORM_sec_offset
:
14762 fprintf_unfiltered (f
, "section offset: %s",
14763 pulongest (DW_UNSND (&die
->attrs
[i
])));
14765 case DW_FORM_ref_sig8
:
14766 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
14767 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
14768 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
14770 fprintf_unfiltered (f
, "signatured type, offset: unknown");
14772 case DW_FORM_string
:
14774 case DW_FORM_GNU_str_index
:
14775 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
14776 DW_STRING (&die
->attrs
[i
])
14777 ? DW_STRING (&die
->attrs
[i
]) : "",
14778 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
14781 if (DW_UNSND (&die
->attrs
[i
]))
14782 fprintf_unfiltered (f
, "flag: TRUE");
14784 fprintf_unfiltered (f
, "flag: FALSE");
14786 case DW_FORM_flag_present
:
14787 fprintf_unfiltered (f
, "flag: TRUE");
14789 case DW_FORM_indirect
:
14790 /* The reader will have reduced the indirect form to
14791 the "base form" so this form should not occur. */
14792 fprintf_unfiltered (f
,
14793 "unexpected attribute form: DW_FORM_indirect");
14796 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
14797 die
->attrs
[i
].form
);
14800 fprintf_unfiltered (f
, "\n");
14805 dump_die_for_error (struct die_info
*die
)
14807 dump_die_shallow (gdb_stderr
, 0, die
);
14811 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
14813 int indent
= level
* 4;
14815 gdb_assert (die
!= NULL
);
14817 if (level
>= max_level
)
14820 dump_die_shallow (f
, indent
, die
);
14822 if (die
->child
!= NULL
)
14824 print_spaces (indent
, f
);
14825 fprintf_unfiltered (f
, " Children:");
14826 if (level
+ 1 < max_level
)
14828 fprintf_unfiltered (f
, "\n");
14829 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
14833 fprintf_unfiltered (f
,
14834 " [not printed, max nesting level reached]\n");
14838 if (die
->sibling
!= NULL
&& level
> 0)
14840 dump_die_1 (f
, level
, max_level
, die
->sibling
);
14844 /* This is called from the pdie macro in gdbinit.in.
14845 It's not static so gcc will keep a copy callable from gdb. */
14848 dump_die (struct die_info
*die
, int max_level
)
14850 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
14854 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
14858 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
14864 /* DW_ADDR is always stored already as sect_offset; despite for the forms
14865 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
14868 is_ref_attr (struct attribute
*attr
)
14870 switch (attr
->form
)
14872 case DW_FORM_ref_addr
:
14877 case DW_FORM_ref_udata
:
14884 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
14888 dwarf2_get_ref_die_offset (struct attribute
*attr
)
14890 sect_offset retval
= { DW_UNSND (attr
) };
14892 if (is_ref_attr (attr
))
14895 retval
.sect_off
= 0;
14896 complaint (&symfile_complaints
,
14897 _("unsupported die ref attribute form: '%s'"),
14898 dwarf_form_name (attr
->form
));
14902 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
14903 * the value held by the attribute is not constant. */
14906 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
14908 if (attr
->form
== DW_FORM_sdata
)
14909 return DW_SND (attr
);
14910 else if (attr
->form
== DW_FORM_udata
14911 || attr
->form
== DW_FORM_data1
14912 || attr
->form
== DW_FORM_data2
14913 || attr
->form
== DW_FORM_data4
14914 || attr
->form
== DW_FORM_data8
)
14915 return DW_UNSND (attr
);
14918 complaint (&symfile_complaints
,
14919 _("Attribute value is not a constant (%s)"),
14920 dwarf_form_name (attr
->form
));
14921 return default_value
;
14925 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
14926 unit and add it to our queue.
14927 The result is non-zero if PER_CU was queued, otherwise the result is zero
14928 meaning either PER_CU is already queued or it is already loaded. */
14931 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
14932 struct dwarf2_per_cu_data
*per_cu
,
14933 enum language pretend_language
)
14935 /* We may arrive here during partial symbol reading, if we need full
14936 DIEs to process an unusual case (e.g. template arguments). Do
14937 not queue PER_CU, just tell our caller to load its DIEs. */
14938 if (dwarf2_per_objfile
->reading_partial_symbols
)
14940 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
14945 /* Mark the dependence relation so that we don't flush PER_CU
14947 dwarf2_add_dependence (this_cu
, per_cu
);
14949 /* If it's already on the queue, we have nothing to do. */
14950 if (per_cu
->queued
)
14953 /* If the compilation unit is already loaded, just mark it as
14955 if (per_cu
->cu
!= NULL
)
14957 per_cu
->cu
->last_used
= 0;
14961 /* Add it to the queue. */
14962 queue_comp_unit (per_cu
, pretend_language
);
14967 /* Follow reference or signature attribute ATTR of SRC_DIE.
14968 On entry *REF_CU is the CU of SRC_DIE.
14969 On exit *REF_CU is the CU of the result. */
14971 static struct die_info
*
14972 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
14973 struct dwarf2_cu
**ref_cu
)
14975 struct die_info
*die
;
14977 if (is_ref_attr (attr
))
14978 die
= follow_die_ref (src_die
, attr
, ref_cu
);
14979 else if (attr
->form
== DW_FORM_ref_sig8
)
14980 die
= follow_die_sig (src_die
, attr
, ref_cu
);
14983 dump_die_for_error (src_die
);
14984 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
14985 (*ref_cu
)->objfile
->name
);
14991 /* Follow reference OFFSET.
14992 On entry *REF_CU is the CU of the source die referencing OFFSET.
14993 On exit *REF_CU is the CU of the result.
14994 Returns NULL if OFFSET is invalid. */
14996 static struct die_info
*
14997 follow_die_offset (sect_offset offset
, struct dwarf2_cu
**ref_cu
)
14999 struct die_info temp_die
;
15000 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
15002 gdb_assert (cu
->per_cu
!= NULL
);
15006 if (cu
->per_cu
->is_debug_types
)
15008 /* .debug_types CUs cannot reference anything outside their CU.
15009 If they need to, they have to reference a signatured type via
15010 DW_FORM_ref_sig8. */
15011 if (! offset_in_cu_p (&cu
->header
, offset
))
15014 else if (! offset_in_cu_p (&cu
->header
, offset
))
15016 struct dwarf2_per_cu_data
*per_cu
;
15018 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
15020 /* If necessary, add it to the queue and load its DIEs. */
15021 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
15022 load_full_comp_unit (per_cu
, cu
->language
);
15024 target_cu
= per_cu
->cu
;
15026 else if (cu
->dies
== NULL
)
15028 /* We're loading full DIEs during partial symbol reading. */
15029 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
15030 load_full_comp_unit (cu
->per_cu
, language_minimal
);
15033 *ref_cu
= target_cu
;
15034 temp_die
.offset
= offset
;
15035 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
15038 /* Follow reference attribute ATTR of SRC_DIE.
15039 On entry *REF_CU is the CU of SRC_DIE.
15040 On exit *REF_CU is the CU of the result. */
15042 static struct die_info
*
15043 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
15044 struct dwarf2_cu
**ref_cu
)
15046 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15047 struct dwarf2_cu
*cu
= *ref_cu
;
15048 struct die_info
*die
;
15050 die
= follow_die_offset (offset
, ref_cu
);
15052 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
15053 "at 0x%x [in module %s]"),
15054 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
15059 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
15060 Returned value is intended for DW_OP_call*. Returned
15061 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
15063 struct dwarf2_locexpr_baton
15064 dwarf2_fetch_die_location_block (cu_offset offset_in_cu
,
15065 struct dwarf2_per_cu_data
*per_cu
,
15066 CORE_ADDR (*get_frame_pc
) (void *baton
),
15069 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
15070 struct dwarf2_cu
*cu
;
15071 struct die_info
*die
;
15072 struct attribute
*attr
;
15073 struct dwarf2_locexpr_baton retval
;
15075 dw2_setup (per_cu
->objfile
);
15077 if (per_cu
->cu
== NULL
)
15081 die
= follow_die_offset (offset
, &cu
);
15083 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
15084 offset
.sect_off
, per_cu
->objfile
->name
);
15086 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15089 /* DWARF: "If there is no such attribute, then there is no effect.".
15090 DATA is ignored if SIZE is 0. */
15092 retval
.data
= NULL
;
15095 else if (attr_form_is_section_offset (attr
))
15097 struct dwarf2_loclist_baton loclist_baton
;
15098 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
15101 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
15103 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
15105 retval
.size
= size
;
15109 if (!attr_form_is_block (attr
))
15110 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
15111 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
15112 offset
.sect_off
, per_cu
->objfile
->name
);
15114 retval
.data
= DW_BLOCK (attr
)->data
;
15115 retval
.size
= DW_BLOCK (attr
)->size
;
15117 retval
.per_cu
= cu
->per_cu
;
15119 age_cached_comp_units ();
15124 /* Return the type of the DIE at DIE_OFFSET in the CU named by
15128 dwarf2_get_die_type (cu_offset die_offset
,
15129 struct dwarf2_per_cu_data
*per_cu
)
15131 sect_offset die_offset_sect
;
15133 dw2_setup (per_cu
->objfile
);
15135 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
15136 return get_die_type_at_offset (die_offset_sect
, per_cu
);
15139 /* Follow the signature attribute ATTR in SRC_DIE.
15140 On entry *REF_CU is the CU of SRC_DIE.
15141 On exit *REF_CU is the CU of the result. */
15143 static struct die_info
*
15144 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
15145 struct dwarf2_cu
**ref_cu
)
15147 struct objfile
*objfile
= (*ref_cu
)->objfile
;
15148 struct die_info temp_die
;
15149 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
15150 struct dwarf2_cu
*sig_cu
;
15151 struct die_info
*die
;
15153 /* sig_type will be NULL if the signatured type is missing from
15155 if (sig_type
== NULL
)
15156 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
15157 "at 0x%x [in module %s]"),
15158 src_die
->offset
.sect_off
, objfile
->name
);
15160 /* If necessary, add it to the queue and load its DIEs. */
15162 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
15163 read_signatured_type (sig_type
);
15165 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
15167 sig_cu
= sig_type
->per_cu
.cu
;
15168 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
15169 temp_die
.offset
= sig_type
->type_offset_in_section
;
15170 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
15171 temp_die
.offset
.sect_off
);
15178 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
15179 "from DIE at 0x%x [in module %s]"),
15180 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
15183 /* Given an offset of a signatured type, return its signatured_type. */
15185 static struct signatured_type
*
15186 lookup_signatured_type_at_offset (struct objfile
*objfile
,
15187 struct dwarf2_section_info
*section
,
15188 sect_offset offset
)
15190 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
15191 unsigned int length
, initial_length_size
;
15192 unsigned int sig_offset
;
15193 struct signatured_type find_entry
, *sig_type
;
15195 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
15196 sig_offset
= (initial_length_size
15198 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
15199 + 1 /*address_size*/);
15200 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
15201 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
15203 /* This is only used to lookup previously recorded types.
15204 If we didn't find it, it's our bug. */
15205 gdb_assert (sig_type
!= NULL
);
15206 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
15211 /* Load the DIEs associated with type unit PER_CU into memory. */
15214 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
15216 struct objfile
*objfile
= per_cu
->objfile
;
15217 struct dwarf2_section_info
*sect
= per_cu
->info_or_types_section
;
15218 sect_offset offset
= per_cu
->offset
;
15219 struct signatured_type
*sig_type
;
15221 dwarf2_read_section (objfile
, sect
);
15223 /* We have the section offset, but we need the signature to do the
15224 hash table lookup. */
15225 /* FIXME: This is sorta unnecessary, read_signatured_type only uses
15226 the signature to assert we found the right one.
15227 Ok, but it's a lot of work. We should simplify things so any needed
15228 assert doesn't require all this clumsiness. */
15229 sig_type
= lookup_signatured_type_at_offset (objfile
, sect
, offset
);
15231 gdb_assert (&sig_type
->per_cu
== per_cu
);
15232 gdb_assert (sig_type
->per_cu
.cu
== NULL
);
15234 read_signatured_type (sig_type
);
15236 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
15239 /* die_reader_func for read_signatured_type.
15240 This is identical to load_full_comp_unit_reader,
15241 but is kept separate for now. */
15244 read_signatured_type_reader (const struct die_reader_specs
*reader
,
15245 gdb_byte
*info_ptr
,
15246 struct die_info
*comp_unit_die
,
15250 struct dwarf2_cu
*cu
= reader
->cu
;
15252 gdb_assert (cu
->die_hash
== NULL
);
15254 htab_create_alloc_ex (cu
->header
.length
/ 12,
15258 &cu
->comp_unit_obstack
,
15259 hashtab_obstack_allocate
,
15260 dummy_obstack_deallocate
);
15263 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
15264 &info_ptr
, comp_unit_die
);
15265 cu
->dies
= comp_unit_die
;
15266 /* comp_unit_die is not stored in die_hash, no need. */
15268 /* We try not to read any attributes in this function, because not
15269 all CUs needed for references have been loaded yet, and symbol
15270 table processing isn't initialized. But we have to set the CU language,
15271 or we won't be able to build types correctly.
15272 Similarly, if we do not read the producer, we can not apply
15273 producer-specific interpretation. */
15274 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
15277 /* Read in a signatured type and build its CU and DIEs.
15278 If the type is a stub for the real type in a DWO file,
15279 read in the real type from the DWO file as well. */
15282 read_signatured_type (struct signatured_type
*sig_type
)
15284 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
15286 gdb_assert (per_cu
->is_debug_types
);
15287 gdb_assert (per_cu
->cu
== NULL
);
15289 init_cutu_and_read_dies (per_cu
, 0, 1, read_signatured_type_reader
, NULL
);
15292 /* Decode simple location descriptions.
15293 Given a pointer to a dwarf block that defines a location, compute
15294 the location and return the value.
15296 NOTE drow/2003-11-18: This function is called in two situations
15297 now: for the address of static or global variables (partial symbols
15298 only) and for offsets into structures which are expected to be
15299 (more or less) constant. The partial symbol case should go away,
15300 and only the constant case should remain. That will let this
15301 function complain more accurately. A few special modes are allowed
15302 without complaint for global variables (for instance, global
15303 register values and thread-local values).
15305 A location description containing no operations indicates that the
15306 object is optimized out. The return value is 0 for that case.
15307 FIXME drow/2003-11-16: No callers check for this case any more; soon all
15308 callers will only want a very basic result and this can become a
15311 Note that stack[0] is unused except as a default error return. */
15314 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
15316 struct objfile
*objfile
= cu
->objfile
;
15318 int size
= blk
->size
;
15319 gdb_byte
*data
= blk
->data
;
15320 CORE_ADDR stack
[64];
15322 unsigned int bytes_read
, unsnd
;
15328 stack
[++stacki
] = 0;
15367 stack
[++stacki
] = op
- DW_OP_lit0
;
15402 stack
[++stacki
] = op
- DW_OP_reg0
;
15404 dwarf2_complex_location_expr_complaint ();
15408 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
15410 stack
[++stacki
] = unsnd
;
15412 dwarf2_complex_location_expr_complaint ();
15416 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
15421 case DW_OP_const1u
:
15422 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
15426 case DW_OP_const1s
:
15427 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
15431 case DW_OP_const2u
:
15432 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
15436 case DW_OP_const2s
:
15437 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
15441 case DW_OP_const4u
:
15442 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
15446 case DW_OP_const4s
:
15447 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
15451 case DW_OP_const8u
:
15452 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
15457 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
15463 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
15468 stack
[stacki
+ 1] = stack
[stacki
];
15473 stack
[stacki
- 1] += stack
[stacki
];
15477 case DW_OP_plus_uconst
:
15478 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
15484 stack
[stacki
- 1] -= stack
[stacki
];
15489 /* If we're not the last op, then we definitely can't encode
15490 this using GDB's address_class enum. This is valid for partial
15491 global symbols, although the variable's address will be bogus
15494 dwarf2_complex_location_expr_complaint ();
15497 case DW_OP_GNU_push_tls_address
:
15498 /* The top of the stack has the offset from the beginning
15499 of the thread control block at which the variable is located. */
15500 /* Nothing should follow this operator, so the top of stack would
15502 /* This is valid for partial global symbols, but the variable's
15503 address will be bogus in the psymtab. Make it always at least
15504 non-zero to not look as a variable garbage collected by linker
15505 which have DW_OP_addr 0. */
15507 dwarf2_complex_location_expr_complaint ();
15511 case DW_OP_GNU_uninit
:
15514 case DW_OP_GNU_addr_index
:
15515 case DW_OP_GNU_const_index
:
15516 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
15523 const char *name
= get_DW_OP_name (op
);
15526 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
15529 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
15533 return (stack
[stacki
]);
15536 /* Enforce maximum stack depth of SIZE-1 to avoid writing
15537 outside of the allocated space. Also enforce minimum>0. */
15538 if (stacki
>= ARRAY_SIZE (stack
) - 1)
15540 complaint (&symfile_complaints
,
15541 _("location description stack overflow"));
15547 complaint (&symfile_complaints
,
15548 _("location description stack underflow"));
15552 return (stack
[stacki
]);
15555 /* memory allocation interface */
15557 static struct dwarf_block
*
15558 dwarf_alloc_block (struct dwarf2_cu
*cu
)
15560 struct dwarf_block
*blk
;
15562 blk
= (struct dwarf_block
*)
15563 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
15567 static struct abbrev_info
*
15568 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
15570 struct abbrev_info
*abbrev
;
15572 abbrev
= (struct abbrev_info
*)
15573 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
15574 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15578 static struct die_info
*
15579 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
15581 struct die_info
*die
;
15582 size_t size
= sizeof (struct die_info
);
15585 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
15587 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
15588 memset (die
, 0, sizeof (struct die_info
));
15593 /* Macro support. */
15595 /* Return the full name of file number I in *LH's file name table.
15596 Use COMP_DIR as the name of the current directory of the
15597 compilation. The result is allocated using xmalloc; the caller is
15598 responsible for freeing it. */
15600 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
15602 /* Is the file number a valid index into the line header's file name
15603 table? Remember that file numbers start with one, not zero. */
15604 if (1 <= file
&& file
<= lh
->num_file_names
)
15606 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
15608 if (IS_ABSOLUTE_PATH (fe
->name
))
15609 return xstrdup (fe
->name
);
15617 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
15623 dir_len
= strlen (dir
);
15624 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
15625 strcpy (full_name
, dir
);
15626 full_name
[dir_len
] = '/';
15627 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
15631 return xstrdup (fe
->name
);
15636 /* The compiler produced a bogus file number. We can at least
15637 record the macro definitions made in the file, even if we
15638 won't be able to find the file by name. */
15639 char fake_name
[80];
15641 sprintf (fake_name
, "<bad macro file number %d>", file
);
15643 complaint (&symfile_complaints
,
15644 _("bad file number in macro information (%d)"),
15647 return xstrdup (fake_name
);
15652 static struct macro_source_file
*
15653 macro_start_file (int file
, int line
,
15654 struct macro_source_file
*current_file
,
15655 const char *comp_dir
,
15656 struct line_header
*lh
, struct objfile
*objfile
)
15658 /* The full name of this source file. */
15659 char *full_name
= file_full_name (file
, lh
, comp_dir
);
15661 /* We don't create a macro table for this compilation unit
15662 at all until we actually get a filename. */
15663 if (! pending_macros
)
15664 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
15665 objfile
->macro_cache
);
15667 if (! current_file
)
15669 /* If we have no current file, then this must be the start_file
15670 directive for the compilation unit's main source file. */
15671 current_file
= macro_set_main (pending_macros
, full_name
);
15672 macro_define_special (pending_macros
);
15675 current_file
= macro_include (current_file
, line
, full_name
);
15679 return current_file
;
15683 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
15684 followed by a null byte. */
15686 copy_string (const char *buf
, int len
)
15688 char *s
= xmalloc (len
+ 1);
15690 memcpy (s
, buf
, len
);
15696 static const char *
15697 consume_improper_spaces (const char *p
, const char *body
)
15701 complaint (&symfile_complaints
,
15702 _("macro definition contains spaces "
15703 "in formal argument list:\n`%s'"),
15715 parse_macro_definition (struct macro_source_file
*file
, int line
,
15720 /* The body string takes one of two forms. For object-like macro
15721 definitions, it should be:
15723 <macro name> " " <definition>
15725 For function-like macro definitions, it should be:
15727 <macro name> "() " <definition>
15729 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
15731 Spaces may appear only where explicitly indicated, and in the
15734 The Dwarf 2 spec says that an object-like macro's name is always
15735 followed by a space, but versions of GCC around March 2002 omit
15736 the space when the macro's definition is the empty string.
15738 The Dwarf 2 spec says that there should be no spaces between the
15739 formal arguments in a function-like macro's formal argument list,
15740 but versions of GCC around March 2002 include spaces after the
15744 /* Find the extent of the macro name. The macro name is terminated
15745 by either a space or null character (for an object-like macro) or
15746 an opening paren (for a function-like macro). */
15747 for (p
= body
; *p
; p
++)
15748 if (*p
== ' ' || *p
== '(')
15751 if (*p
== ' ' || *p
== '\0')
15753 /* It's an object-like macro. */
15754 int name_len
= p
- body
;
15755 char *name
= copy_string (body
, name_len
);
15756 const char *replacement
;
15759 replacement
= body
+ name_len
+ 1;
15762 dwarf2_macro_malformed_definition_complaint (body
);
15763 replacement
= body
+ name_len
;
15766 macro_define_object (file
, line
, name
, replacement
);
15770 else if (*p
== '(')
15772 /* It's a function-like macro. */
15773 char *name
= copy_string (body
, p
- body
);
15776 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
15780 p
= consume_improper_spaces (p
, body
);
15782 /* Parse the formal argument list. */
15783 while (*p
&& *p
!= ')')
15785 /* Find the extent of the current argument name. */
15786 const char *arg_start
= p
;
15788 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
15791 if (! *p
|| p
== arg_start
)
15792 dwarf2_macro_malformed_definition_complaint (body
);
15795 /* Make sure argv has room for the new argument. */
15796 if (argc
>= argv_size
)
15799 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
15802 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
15805 p
= consume_improper_spaces (p
, body
);
15807 /* Consume the comma, if present. */
15812 p
= consume_improper_spaces (p
, body
);
15821 /* Perfectly formed definition, no complaints. */
15822 macro_define_function (file
, line
, name
,
15823 argc
, (const char **) argv
,
15825 else if (*p
== '\0')
15827 /* Complain, but do define it. */
15828 dwarf2_macro_malformed_definition_complaint (body
);
15829 macro_define_function (file
, line
, name
,
15830 argc
, (const char **) argv
,
15834 /* Just complain. */
15835 dwarf2_macro_malformed_definition_complaint (body
);
15838 /* Just complain. */
15839 dwarf2_macro_malformed_definition_complaint (body
);
15845 for (i
= 0; i
< argc
; i
++)
15851 dwarf2_macro_malformed_definition_complaint (body
);
15854 /* Skip some bytes from BYTES according to the form given in FORM.
15855 Returns the new pointer. */
15858 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
15859 enum dwarf_form form
,
15860 unsigned int offset_size
,
15861 struct dwarf2_section_info
*section
)
15863 unsigned int bytes_read
;
15867 case DW_FORM_data1
:
15872 case DW_FORM_data2
:
15876 case DW_FORM_data4
:
15880 case DW_FORM_data8
:
15884 case DW_FORM_string
:
15885 read_direct_string (abfd
, bytes
, &bytes_read
);
15886 bytes
+= bytes_read
;
15889 case DW_FORM_sec_offset
:
15891 bytes
+= offset_size
;
15894 case DW_FORM_block
:
15895 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
15896 bytes
+= bytes_read
;
15899 case DW_FORM_block1
:
15900 bytes
+= 1 + read_1_byte (abfd
, bytes
);
15902 case DW_FORM_block2
:
15903 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
15905 case DW_FORM_block4
:
15906 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
15909 case DW_FORM_sdata
:
15910 case DW_FORM_udata
:
15911 case DW_FORM_GNU_addr_index
:
15912 case DW_FORM_GNU_str_index
:
15913 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
15916 dwarf2_section_buffer_overflow_complaint (section
);
15924 complaint (&symfile_complaints
,
15925 _("invalid form 0x%x in `%s'"),
15927 section
->asection
->name
);
15935 /* A helper for dwarf_decode_macros that handles skipping an unknown
15936 opcode. Returns an updated pointer to the macro data buffer; or,
15937 on error, issues a complaint and returns NULL. */
15940 skip_unknown_opcode (unsigned int opcode
,
15941 gdb_byte
**opcode_definitions
,
15942 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
15944 unsigned int offset_size
,
15945 struct dwarf2_section_info
*section
)
15947 unsigned int bytes_read
, i
;
15951 if (opcode_definitions
[opcode
] == NULL
)
15953 complaint (&symfile_complaints
,
15954 _("unrecognized DW_MACFINO opcode 0x%x"),
15959 defn
= opcode_definitions
[opcode
];
15960 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
15961 defn
+= bytes_read
;
15963 for (i
= 0; i
< arg
; ++i
)
15965 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
15967 if (mac_ptr
== NULL
)
15969 /* skip_form_bytes already issued the complaint. */
15977 /* A helper function which parses the header of a macro section.
15978 If the macro section is the extended (for now called "GNU") type,
15979 then this updates *OFFSET_SIZE. Returns a pointer to just after
15980 the header, or issues a complaint and returns NULL on error. */
15983 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
15986 unsigned int *offset_size
,
15987 int section_is_gnu
)
15989 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
15991 if (section_is_gnu
)
15993 unsigned int version
, flags
;
15995 version
= read_2_bytes (abfd
, mac_ptr
);
15998 complaint (&symfile_complaints
,
15999 _("unrecognized version `%d' in .debug_macro section"),
16005 flags
= read_1_byte (abfd
, mac_ptr
);
16007 *offset_size
= (flags
& 1) ? 8 : 4;
16009 if ((flags
& 2) != 0)
16010 /* We don't need the line table offset. */
16011 mac_ptr
+= *offset_size
;
16013 /* Vendor opcode descriptions. */
16014 if ((flags
& 4) != 0)
16016 unsigned int i
, count
;
16018 count
= read_1_byte (abfd
, mac_ptr
);
16020 for (i
= 0; i
< count
; ++i
)
16022 unsigned int opcode
, bytes_read
;
16025 opcode
= read_1_byte (abfd
, mac_ptr
);
16027 opcode_definitions
[opcode
] = mac_ptr
;
16028 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16029 mac_ptr
+= bytes_read
;
16038 /* A helper for dwarf_decode_macros that handles the GNU extensions,
16039 including DW_MACRO_GNU_transparent_include. */
16042 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
16043 struct macro_source_file
*current_file
,
16044 struct line_header
*lh
, char *comp_dir
,
16045 struct dwarf2_section_info
*section
,
16046 int section_is_gnu
,
16047 unsigned int offset_size
,
16048 struct objfile
*objfile
,
16049 htab_t include_hash
)
16051 enum dwarf_macro_record_type macinfo_type
;
16052 int at_commandline
;
16053 gdb_byte
*opcode_definitions
[256];
16055 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
16056 &offset_size
, section_is_gnu
);
16057 if (mac_ptr
== NULL
)
16059 /* We already issued a complaint. */
16063 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
16064 GDB is still reading the definitions from command line. First
16065 DW_MACINFO_start_file will need to be ignored as it was already executed
16066 to create CURRENT_FILE for the main source holding also the command line
16067 definitions. On first met DW_MACINFO_start_file this flag is reset to
16068 normally execute all the remaining DW_MACINFO_start_file macinfos. */
16070 at_commandline
= 1;
16074 /* Do we at least have room for a macinfo type byte? */
16075 if (mac_ptr
>= mac_end
)
16077 dwarf2_section_buffer_overflow_complaint (section
);
16081 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
16084 /* Note that we rely on the fact that the corresponding GNU and
16085 DWARF constants are the same. */
16086 switch (macinfo_type
)
16088 /* A zero macinfo type indicates the end of the macro
16093 case DW_MACRO_GNU_define
:
16094 case DW_MACRO_GNU_undef
:
16095 case DW_MACRO_GNU_define_indirect
:
16096 case DW_MACRO_GNU_undef_indirect
:
16098 unsigned int bytes_read
;
16103 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16104 mac_ptr
+= bytes_read
;
16106 if (macinfo_type
== DW_MACRO_GNU_define
16107 || macinfo_type
== DW_MACRO_GNU_undef
)
16109 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16110 mac_ptr
+= bytes_read
;
16114 LONGEST str_offset
;
16116 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
16117 mac_ptr
+= offset_size
;
16119 body
= read_indirect_string_at_offset (abfd
, str_offset
);
16122 is_define
= (macinfo_type
== DW_MACRO_GNU_define
16123 || macinfo_type
== DW_MACRO_GNU_define_indirect
);
16124 if (! current_file
)
16126 /* DWARF violation as no main source is present. */
16127 complaint (&symfile_complaints
,
16128 _("debug info with no main source gives macro %s "
16130 is_define
? _("definition") : _("undefinition"),
16134 if ((line
== 0 && !at_commandline
)
16135 || (line
!= 0 && at_commandline
))
16136 complaint (&symfile_complaints
,
16137 _("debug info gives %s macro %s with %s line %d: %s"),
16138 at_commandline
? _("command-line") : _("in-file"),
16139 is_define
? _("definition") : _("undefinition"),
16140 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
16143 parse_macro_definition (current_file
, line
, body
);
16146 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
16147 || macinfo_type
== DW_MACRO_GNU_undef_indirect
);
16148 macro_undef (current_file
, line
, body
);
16153 case DW_MACRO_GNU_start_file
:
16155 unsigned int bytes_read
;
16158 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16159 mac_ptr
+= bytes_read
;
16160 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16161 mac_ptr
+= bytes_read
;
16163 if ((line
== 0 && !at_commandline
)
16164 || (line
!= 0 && at_commandline
))
16165 complaint (&symfile_complaints
,
16166 _("debug info gives source %d included "
16167 "from %s at %s line %d"),
16168 file
, at_commandline
? _("command-line") : _("file"),
16169 line
== 0 ? _("zero") : _("non-zero"), line
);
16171 if (at_commandline
)
16173 /* This DW_MACRO_GNU_start_file was executed in the
16175 at_commandline
= 0;
16178 current_file
= macro_start_file (file
, line
,
16179 current_file
, comp_dir
,
16184 case DW_MACRO_GNU_end_file
:
16185 if (! current_file
)
16186 complaint (&symfile_complaints
,
16187 _("macro debug info has an unmatched "
16188 "`close_file' directive"));
16191 current_file
= current_file
->included_by
;
16192 if (! current_file
)
16194 enum dwarf_macro_record_type next_type
;
16196 /* GCC circa March 2002 doesn't produce the zero
16197 type byte marking the end of the compilation
16198 unit. Complain if it's not there, but exit no
16201 /* Do we at least have room for a macinfo type byte? */
16202 if (mac_ptr
>= mac_end
)
16204 dwarf2_section_buffer_overflow_complaint (section
);
16208 /* We don't increment mac_ptr here, so this is just
16210 next_type
= read_1_byte (abfd
, mac_ptr
);
16211 if (next_type
!= 0)
16212 complaint (&symfile_complaints
,
16213 _("no terminating 0-type entry for "
16214 "macros in `.debug_macinfo' section"));
16221 case DW_MACRO_GNU_transparent_include
:
16226 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
16227 mac_ptr
+= offset_size
;
16229 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
16232 /* This has actually happened; see
16233 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
16234 complaint (&symfile_complaints
,
16235 _("recursive DW_MACRO_GNU_transparent_include in "
16236 ".debug_macro section"));
16242 dwarf_decode_macro_bytes (abfd
,
16243 section
->buffer
+ offset
,
16244 mac_end
, current_file
,
16246 section
, section_is_gnu
,
16247 offset_size
, objfile
, include_hash
);
16249 htab_remove_elt (include_hash
, mac_ptr
);
16254 case DW_MACINFO_vendor_ext
:
16255 if (!section_is_gnu
)
16257 unsigned int bytes_read
;
16260 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16261 mac_ptr
+= bytes_read
;
16262 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16263 mac_ptr
+= bytes_read
;
16265 /* We don't recognize any vendor extensions. */
16271 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
16272 mac_ptr
, mac_end
, abfd
, offset_size
,
16274 if (mac_ptr
== NULL
)
16278 } while (macinfo_type
!= 0);
16282 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
16283 char *comp_dir
, bfd
*abfd
,
16284 struct dwarf2_cu
*cu
,
16285 struct dwarf2_section_info
*section
,
16286 int section_is_gnu
, const char *section_name
)
16288 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16289 gdb_byte
*mac_ptr
, *mac_end
;
16290 struct macro_source_file
*current_file
= 0;
16291 enum dwarf_macro_record_type macinfo_type
;
16292 unsigned int offset_size
= cu
->header
.offset_size
;
16293 gdb_byte
*opcode_definitions
[256];
16294 struct cleanup
*cleanup
;
16295 htab_t include_hash
;
16298 dwarf2_read_section (objfile
, section
);
16299 if (section
->buffer
== NULL
)
16301 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
16305 /* First pass: Find the name of the base filename.
16306 This filename is needed in order to process all macros whose definition
16307 (or undefinition) comes from the command line. These macros are defined
16308 before the first DW_MACINFO_start_file entry, and yet still need to be
16309 associated to the base file.
16311 To determine the base file name, we scan the macro definitions until we
16312 reach the first DW_MACINFO_start_file entry. We then initialize
16313 CURRENT_FILE accordingly so that any macro definition found before the
16314 first DW_MACINFO_start_file can still be associated to the base file. */
16316 mac_ptr
= section
->buffer
+ offset
;
16317 mac_end
= section
->buffer
+ section
->size
;
16319 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
16320 &offset_size
, section_is_gnu
);
16321 if (mac_ptr
== NULL
)
16323 /* We already issued a complaint. */
16329 /* Do we at least have room for a macinfo type byte? */
16330 if (mac_ptr
>= mac_end
)
16332 /* Complaint is printed during the second pass as GDB will probably
16333 stop the first pass earlier upon finding
16334 DW_MACINFO_start_file. */
16338 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
16341 /* Note that we rely on the fact that the corresponding GNU and
16342 DWARF constants are the same. */
16343 switch (macinfo_type
)
16345 /* A zero macinfo type indicates the end of the macro
16350 case DW_MACRO_GNU_define
:
16351 case DW_MACRO_GNU_undef
:
16352 /* Only skip the data by MAC_PTR. */
16354 unsigned int bytes_read
;
16356 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16357 mac_ptr
+= bytes_read
;
16358 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16359 mac_ptr
+= bytes_read
;
16363 case DW_MACRO_GNU_start_file
:
16365 unsigned int bytes_read
;
16368 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16369 mac_ptr
+= bytes_read
;
16370 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16371 mac_ptr
+= bytes_read
;
16373 current_file
= macro_start_file (file
, line
, current_file
,
16374 comp_dir
, lh
, objfile
);
16378 case DW_MACRO_GNU_end_file
:
16379 /* No data to skip by MAC_PTR. */
16382 case DW_MACRO_GNU_define_indirect
:
16383 case DW_MACRO_GNU_undef_indirect
:
16385 unsigned int bytes_read
;
16387 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16388 mac_ptr
+= bytes_read
;
16389 mac_ptr
+= offset_size
;
16393 case DW_MACRO_GNU_transparent_include
:
16394 /* Note that, according to the spec, a transparent include
16395 chain cannot call DW_MACRO_GNU_start_file. So, we can just
16396 skip this opcode. */
16397 mac_ptr
+= offset_size
;
16400 case DW_MACINFO_vendor_ext
:
16401 /* Only skip the data by MAC_PTR. */
16402 if (!section_is_gnu
)
16404 unsigned int bytes_read
;
16406 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
16407 mac_ptr
+= bytes_read
;
16408 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
16409 mac_ptr
+= bytes_read
;
16414 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
16415 mac_ptr
, mac_end
, abfd
, offset_size
,
16417 if (mac_ptr
== NULL
)
16421 } while (macinfo_type
!= 0 && current_file
== NULL
);
16423 /* Second pass: Process all entries.
16425 Use the AT_COMMAND_LINE flag to determine whether we are still processing
16426 command-line macro definitions/undefinitions. This flag is unset when we
16427 reach the first DW_MACINFO_start_file entry. */
16429 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
16430 NULL
, xcalloc
, xfree
);
16431 cleanup
= make_cleanup_htab_delete (include_hash
);
16432 mac_ptr
= section
->buffer
+ offset
;
16433 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
16435 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
16436 current_file
, lh
, comp_dir
, section
, section_is_gnu
,
16437 offset_size
, objfile
, include_hash
);
16438 do_cleanups (cleanup
);
16441 /* Check if the attribute's form is a DW_FORM_block*
16442 if so return true else false. */
16445 attr_form_is_block (struct attribute
*attr
)
16447 return (attr
== NULL
? 0 :
16448 attr
->form
== DW_FORM_block1
16449 || attr
->form
== DW_FORM_block2
16450 || attr
->form
== DW_FORM_block4
16451 || attr
->form
== DW_FORM_block
16452 || attr
->form
== DW_FORM_exprloc
);
16455 /* Return non-zero if ATTR's value is a section offset --- classes
16456 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
16457 You may use DW_UNSND (attr) to retrieve such offsets.
16459 Section 7.5.4, "Attribute Encodings", explains that no attribute
16460 may have a value that belongs to more than one of these classes; it
16461 would be ambiguous if we did, because we use the same forms for all
16465 attr_form_is_section_offset (struct attribute
*attr
)
16467 return (attr
->form
== DW_FORM_data4
16468 || attr
->form
== DW_FORM_data8
16469 || attr
->form
== DW_FORM_sec_offset
);
16472 /* Return non-zero if ATTR's value falls in the 'constant' class, or
16473 zero otherwise. When this function returns true, you can apply
16474 dwarf2_get_attr_constant_value to it.
16476 However, note that for some attributes you must check
16477 attr_form_is_section_offset before using this test. DW_FORM_data4
16478 and DW_FORM_data8 are members of both the constant class, and of
16479 the classes that contain offsets into other debug sections
16480 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
16481 that, if an attribute's can be either a constant or one of the
16482 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
16483 taken as section offsets, not constants. */
16486 attr_form_is_constant (struct attribute
*attr
)
16488 switch (attr
->form
)
16490 case DW_FORM_sdata
:
16491 case DW_FORM_udata
:
16492 case DW_FORM_data1
:
16493 case DW_FORM_data2
:
16494 case DW_FORM_data4
:
16495 case DW_FORM_data8
:
16502 /* Return the .debug_loc section to use for CU.
16503 For DWO files use .debug_loc.dwo. */
16505 static struct dwarf2_section_info
*
16506 cu_debug_loc_section (struct dwarf2_cu
*cu
)
16509 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
16510 return &dwarf2_per_objfile
->loc
;
16513 /* A helper function that fills in a dwarf2_loclist_baton. */
16516 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
16517 struct dwarf2_loclist_baton
*baton
,
16518 struct attribute
*attr
)
16520 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
16522 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
16524 baton
->per_cu
= cu
->per_cu
;
16525 gdb_assert (baton
->per_cu
);
16526 /* We don't know how long the location list is, but make sure we
16527 don't run off the edge of the section. */
16528 baton
->size
= section
->size
- DW_UNSND (attr
);
16529 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
16530 baton
->base_address
= cu
->base_address
;
16531 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
16535 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
16536 struct dwarf2_cu
*cu
)
16538 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16539 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
16541 if (attr_form_is_section_offset (attr
)
16542 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
16543 the section. If so, fall through to the complaint in the
16545 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
16547 struct dwarf2_loclist_baton
*baton
;
16549 baton
= obstack_alloc (&objfile
->objfile_obstack
,
16550 sizeof (struct dwarf2_loclist_baton
));
16552 fill_in_loclist_baton (cu
, baton
, attr
);
16554 if (cu
->base_known
== 0)
16555 complaint (&symfile_complaints
,
16556 _("Location list used without "
16557 "specifying the CU base address."));
16559 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
16560 SYMBOL_LOCATION_BATON (sym
) = baton
;
16564 struct dwarf2_locexpr_baton
*baton
;
16566 baton
= obstack_alloc (&objfile
->objfile_obstack
,
16567 sizeof (struct dwarf2_locexpr_baton
));
16568 baton
->per_cu
= cu
->per_cu
;
16569 gdb_assert (baton
->per_cu
);
16571 if (attr_form_is_block (attr
))
16573 /* Note that we're just copying the block's data pointer
16574 here, not the actual data. We're still pointing into the
16575 info_buffer for SYM's objfile; right now we never release
16576 that buffer, but when we do clean up properly this may
16578 baton
->size
= DW_BLOCK (attr
)->size
;
16579 baton
->data
= DW_BLOCK (attr
)->data
;
16583 dwarf2_invalid_attrib_class_complaint ("location description",
16584 SYMBOL_NATURAL_NAME (sym
));
16588 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
16589 SYMBOL_LOCATION_BATON (sym
) = baton
;
16593 /* Return the OBJFILE associated with the compilation unit CU. If CU
16594 came from a separate debuginfo file, then the master objfile is
16598 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
16600 struct objfile
*objfile
= per_cu
->objfile
;
16602 /* Return the master objfile, so that we can report and look up the
16603 correct file containing this variable. */
16604 if (objfile
->separate_debug_objfile_backlink
)
16605 objfile
= objfile
->separate_debug_objfile_backlink
;
16610 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
16611 (CU_HEADERP is unused in such case) or prepare a temporary copy at
16612 CU_HEADERP first. */
16614 static const struct comp_unit_head
*
16615 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
16616 struct dwarf2_per_cu_data
*per_cu
)
16618 struct objfile
*objfile
;
16619 struct dwarf2_per_objfile
*per_objfile
;
16620 gdb_byte
*info_ptr
;
16623 return &per_cu
->cu
->header
;
16625 objfile
= per_cu
->objfile
;
16626 per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
16627 info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
.sect_off
;
16629 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
16630 read_comp_unit_head (cu_headerp
, info_ptr
, objfile
->obfd
);
16635 /* Return the address size given in the compilation unit header for CU. */
16638 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
16640 struct comp_unit_head cu_header_local
;
16641 const struct comp_unit_head
*cu_headerp
;
16643 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16645 return cu_headerp
->addr_size
;
16648 /* Return the offset size given in the compilation unit header for CU. */
16651 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
16653 struct comp_unit_head cu_header_local
;
16654 const struct comp_unit_head
*cu_headerp
;
16656 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16658 return cu_headerp
->offset_size
;
16661 /* See its dwarf2loc.h declaration. */
16664 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
16666 struct comp_unit_head cu_header_local
;
16667 const struct comp_unit_head
*cu_headerp
;
16669 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
16671 if (cu_headerp
->version
== 2)
16672 return cu_headerp
->addr_size
;
16674 return cu_headerp
->offset_size
;
16677 /* Return the text offset of the CU. The returned offset comes from
16678 this CU's objfile. If this objfile came from a separate debuginfo
16679 file, then the offset may be different from the corresponding
16680 offset in the parent objfile. */
16683 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
16685 struct objfile
*objfile
= per_cu
->objfile
;
16687 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
16690 /* Locate the .debug_info compilation unit from CU's objfile which contains
16691 the DIE at OFFSET. Raises an error on failure. */
16693 static struct dwarf2_per_cu_data
*
16694 dwarf2_find_containing_comp_unit (sect_offset offset
,
16695 struct objfile
*objfile
)
16697 struct dwarf2_per_cu_data
*this_cu
;
16701 high
= dwarf2_per_objfile
->n_comp_units
- 1;
16704 int mid
= low
+ (high
- low
) / 2;
16706 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
.sect_off
16707 >= offset
.sect_off
)
16712 gdb_assert (low
== high
);
16713 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
.sect_off
16717 error (_("Dwarf Error: could not find partial DIE containing "
16718 "offset 0x%lx [in module %s]"),
16719 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16721 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
16722 <= offset
.sect_off
);
16723 return dwarf2_per_objfile
->all_comp_units
[low
-1];
16727 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
16728 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
16729 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
16730 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
16731 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
16736 /* Initialize dwarf2_cu CU, owned by PER_CU. */
16739 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
16741 memset (cu
, 0, sizeof (*cu
));
16743 cu
->per_cu
= per_cu
;
16744 cu
->objfile
= per_cu
->objfile
;
16745 obstack_init (&cu
->comp_unit_obstack
);
16748 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
16751 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
16752 enum language pretend_language
)
16754 struct attribute
*attr
;
16756 /* Set the language we're debugging. */
16757 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
16759 set_cu_language (DW_UNSND (attr
), cu
);
16762 cu
->language
= pretend_language
;
16763 cu
->language_defn
= language_def (cu
->language
);
16766 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
16768 cu
->producer
= DW_STRING (attr
);
16771 /* Release one cached compilation unit, CU. We unlink it from the tree
16772 of compilation units, but we don't remove it from the read_in_chain;
16773 the caller is responsible for that.
16774 NOTE: DATA is a void * because this function is also used as a
16775 cleanup routine. */
16778 free_heap_comp_unit (void *data
)
16780 struct dwarf2_cu
*cu
= data
;
16782 gdb_assert (cu
->per_cu
!= NULL
);
16783 cu
->per_cu
->cu
= NULL
;
16786 obstack_free (&cu
->comp_unit_obstack
, NULL
);
16791 /* This cleanup function is passed the address of a dwarf2_cu on the stack
16792 when we're finished with it. We can't free the pointer itself, but be
16793 sure to unlink it from the cache. Also release any associated storage. */
16796 free_stack_comp_unit (void *data
)
16798 struct dwarf2_cu
*cu
= data
;
16800 gdb_assert (cu
->per_cu
!= NULL
);
16801 cu
->per_cu
->cu
= NULL
;
16804 obstack_free (&cu
->comp_unit_obstack
, NULL
);
16805 cu
->partial_dies
= NULL
;
16808 /* Free all cached compilation units. */
16811 free_cached_comp_units (void *data
)
16813 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16815 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16816 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16817 while (per_cu
!= NULL
)
16819 struct dwarf2_per_cu_data
*next_cu
;
16821 next_cu
= per_cu
->cu
->read_in_chain
;
16823 free_heap_comp_unit (per_cu
->cu
);
16824 *last_chain
= next_cu
;
16830 /* Increase the age counter on each cached compilation unit, and free
16831 any that are too old. */
16834 age_cached_comp_units (void)
16836 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16838 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
16839 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16840 while (per_cu
!= NULL
)
16842 per_cu
->cu
->last_used
++;
16843 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
16844 dwarf2_mark (per_cu
->cu
);
16845 per_cu
= per_cu
->cu
->read_in_chain
;
16848 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16849 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16850 while (per_cu
!= NULL
)
16852 struct dwarf2_per_cu_data
*next_cu
;
16854 next_cu
= per_cu
->cu
->read_in_chain
;
16856 if (!per_cu
->cu
->mark
)
16858 free_heap_comp_unit (per_cu
->cu
);
16859 *last_chain
= next_cu
;
16862 last_chain
= &per_cu
->cu
->read_in_chain
;
16868 /* Remove a single compilation unit from the cache. */
16871 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
16873 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
16875 per_cu
= dwarf2_per_objfile
->read_in_chain
;
16876 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
16877 while (per_cu
!= NULL
)
16879 struct dwarf2_per_cu_data
*next_cu
;
16881 next_cu
= per_cu
->cu
->read_in_chain
;
16883 if (per_cu
== target_per_cu
)
16885 free_heap_comp_unit (per_cu
->cu
);
16887 *last_chain
= next_cu
;
16891 last_chain
= &per_cu
->cu
->read_in_chain
;
16897 /* Release all extra memory associated with OBJFILE. */
16900 dwarf2_free_objfile (struct objfile
*objfile
)
16902 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
16904 if (dwarf2_per_objfile
== NULL
)
16907 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
16908 free_cached_comp_units (NULL
);
16910 if (dwarf2_per_objfile
->quick_file_names_table
)
16911 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
16913 /* Everything else should be on the objfile obstack. */
16916 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
16917 We store these in a hash table separate from the DIEs, and preserve them
16918 when the DIEs are flushed out of cache.
16920 The CU "per_cu" pointer is needed because offset alone is not enough to
16921 uniquely identify the type. A file may have multiple .debug_types sections,
16922 or the type may come from a DWO file. We have to use something in
16923 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
16924 routine, get_die_type_at_offset, from outside this file, and thus won't
16925 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
16928 struct dwarf2_per_cu_offset_and_type
16930 const struct dwarf2_per_cu_data
*per_cu
;
16931 sect_offset offset
;
16935 /* Hash function for a dwarf2_per_cu_offset_and_type. */
16938 per_cu_offset_and_type_hash (const void *item
)
16940 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
16942 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
16945 /* Equality function for a dwarf2_per_cu_offset_and_type. */
16948 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
16950 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
16951 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
16953 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
16954 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
16957 /* Set the type associated with DIE to TYPE. Save it in CU's hash
16958 table if necessary. For convenience, return TYPE.
16960 The DIEs reading must have careful ordering to:
16961 * Not cause infite loops trying to read in DIEs as a prerequisite for
16962 reading current DIE.
16963 * Not trying to dereference contents of still incompletely read in types
16964 while reading in other DIEs.
16965 * Enable referencing still incompletely read in types just by a pointer to
16966 the type without accessing its fields.
16968 Therefore caller should follow these rules:
16969 * Try to fetch any prerequisite types we may need to build this DIE type
16970 before building the type and calling set_die_type.
16971 * After building type call set_die_type for current DIE as soon as
16972 possible before fetching more types to complete the current type.
16973 * Make the type as complete as possible before fetching more types. */
16975 static struct type
*
16976 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16978 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
16979 struct objfile
*objfile
= cu
->objfile
;
16981 /* For Ada types, make sure that the gnat-specific data is always
16982 initialized (if not already set). There are a few types where
16983 we should not be doing so, because the type-specific area is
16984 already used to hold some other piece of info (eg: TYPE_CODE_FLT
16985 where the type-specific area is used to store the floatformat).
16986 But this is not a problem, because the gnat-specific information
16987 is actually not needed for these types. */
16988 if (need_gnat_info (cu
)
16989 && TYPE_CODE (type
) != TYPE_CODE_FUNC
16990 && TYPE_CODE (type
) != TYPE_CODE_FLT
16991 && !HAVE_GNAT_AUX_INFO (type
))
16992 INIT_GNAT_SPECIFIC (type
);
16994 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
16996 dwarf2_per_objfile
->die_type_hash
=
16997 htab_create_alloc_ex (127,
16998 per_cu_offset_and_type_hash
,
16999 per_cu_offset_and_type_eq
,
17001 &objfile
->objfile_obstack
,
17002 hashtab_obstack_allocate
,
17003 dummy_obstack_deallocate
);
17006 ofs
.per_cu
= cu
->per_cu
;
17007 ofs
.offset
= die
->offset
;
17009 slot
= (struct dwarf2_per_cu_offset_and_type
**)
17010 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
17012 complaint (&symfile_complaints
,
17013 _("A problem internal to GDB: DIE 0x%x has type already set"),
17014 die
->offset
.sect_off
);
17015 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
17020 /* Look up the type for the die at OFFSET in the appropriate type_hash
17021 table, or return NULL if the die does not have a saved type. */
17023 static struct type
*
17024 get_die_type_at_offset (sect_offset offset
,
17025 struct dwarf2_per_cu_data
*per_cu
)
17027 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
17029 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
17032 ofs
.per_cu
= per_cu
;
17033 ofs
.offset
= offset
;
17034 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
17041 /* Look up the type for DIE in the appropriate type_hash table,
17042 or return NULL if DIE does not have a saved type. */
17044 static struct type
*
17045 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17047 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
17050 /* Add a dependence relationship from CU to REF_PER_CU. */
17053 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
17054 struct dwarf2_per_cu_data
*ref_per_cu
)
17058 if (cu
->dependencies
== NULL
)
17060 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
17061 NULL
, &cu
->comp_unit_obstack
,
17062 hashtab_obstack_allocate
,
17063 dummy_obstack_deallocate
);
17065 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
17067 *slot
= ref_per_cu
;
17070 /* Subroutine of dwarf2_mark to pass to htab_traverse.
17071 Set the mark field in every compilation unit in the
17072 cache that we must keep because we are keeping CU. */
17075 dwarf2_mark_helper (void **slot
, void *data
)
17077 struct dwarf2_per_cu_data
*per_cu
;
17079 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
17081 /* cu->dependencies references may not yet have been ever read if QUIT aborts
17082 reading of the chain. As such dependencies remain valid it is not much
17083 useful to track and undo them during QUIT cleanups. */
17084 if (per_cu
->cu
== NULL
)
17087 if (per_cu
->cu
->mark
)
17089 per_cu
->cu
->mark
= 1;
17091 if (per_cu
->cu
->dependencies
!= NULL
)
17092 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
17097 /* Set the mark field in CU and in every other compilation unit in the
17098 cache that we must keep because we are keeping CU. */
17101 dwarf2_mark (struct dwarf2_cu
*cu
)
17106 if (cu
->dependencies
!= NULL
)
17107 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
17111 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
17115 per_cu
->cu
->mark
= 0;
17116 per_cu
= per_cu
->cu
->read_in_chain
;
17120 /* Trivial hash function for partial_die_info: the hash value of a DIE
17121 is its offset in .debug_info for this objfile. */
17124 partial_die_hash (const void *item
)
17126 const struct partial_die_info
*part_die
= item
;
17128 return part_die
->offset
.sect_off
;
17131 /* Trivial comparison function for partial_die_info structures: two DIEs
17132 are equal if they have the same offset. */
17135 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
17137 const struct partial_die_info
*part_die_lhs
= item_lhs
;
17138 const struct partial_die_info
*part_die_rhs
= item_rhs
;
17140 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
17143 static struct cmd_list_element
*set_dwarf2_cmdlist
;
17144 static struct cmd_list_element
*show_dwarf2_cmdlist
;
17147 set_dwarf2_cmd (char *args
, int from_tty
)
17149 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
17153 show_dwarf2_cmd (char *args
, int from_tty
)
17155 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
17158 /* If section described by INFO was mmapped, munmap it now. */
17161 munmap_section_buffer (struct dwarf2_section_info
*info
)
17163 if (info
->map_addr
!= NULL
)
17168 res
= munmap (info
->map_addr
, info
->map_len
);
17169 gdb_assert (res
== 0);
17171 /* Without HAVE_MMAP, we should never be here to begin with. */
17172 gdb_assert_not_reached ("no mmap support");
17177 /* munmap debug sections for OBJFILE, if necessary. */
17180 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
17182 struct dwarf2_per_objfile
*data
= d
;
17184 struct dwarf2_section_info
*section
;
17186 /* This is sorted according to the order they're defined in to make it easier
17187 to keep in sync. */
17188 munmap_section_buffer (&data
->info
);
17189 munmap_section_buffer (&data
->abbrev
);
17190 munmap_section_buffer (&data
->line
);
17191 munmap_section_buffer (&data
->loc
);
17192 munmap_section_buffer (&data
->macinfo
);
17193 munmap_section_buffer (&data
->macro
);
17194 munmap_section_buffer (&data
->str
);
17195 munmap_section_buffer (&data
->ranges
);
17196 munmap_section_buffer (&data
->addr
);
17197 munmap_section_buffer (&data
->frame
);
17198 munmap_section_buffer (&data
->eh_frame
);
17199 munmap_section_buffer (&data
->gdb_index
);
17202 VEC_iterate (dwarf2_section_info_def
, data
->types
, ix
, section
);
17204 munmap_section_buffer (section
);
17206 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
17207 VEC_free (dwarf2_per_cu_ptr
,
17208 dwarf2_per_objfile
->all_comp_units
[ix
]->imported_symtabs
);
17210 VEC_free (dwarf2_section_info_def
, data
->types
);
17212 if (data
->dwo_files
)
17213 free_dwo_files (data
->dwo_files
, objfile
);
17217 /* The "save gdb-index" command. */
17219 /* The contents of the hash table we create when building the string
17221 struct strtab_entry
17223 offset_type offset
;
17227 /* Hash function for a strtab_entry.
17229 Function is used only during write_hash_table so no index format backward
17230 compatibility is needed. */
17233 hash_strtab_entry (const void *e
)
17235 const struct strtab_entry
*entry
= e
;
17236 return mapped_index_string_hash (INT_MAX
, entry
->str
);
17239 /* Equality function for a strtab_entry. */
17242 eq_strtab_entry (const void *a
, const void *b
)
17244 const struct strtab_entry
*ea
= a
;
17245 const struct strtab_entry
*eb
= b
;
17246 return !strcmp (ea
->str
, eb
->str
);
17249 /* Create a strtab_entry hash table. */
17252 create_strtab (void)
17254 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
17255 xfree
, xcalloc
, xfree
);
17258 /* Add a string to the constant pool. Return the string's offset in
17262 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
17265 struct strtab_entry entry
;
17266 struct strtab_entry
*result
;
17269 slot
= htab_find_slot (table
, &entry
, INSERT
);
17274 result
= XNEW (struct strtab_entry
);
17275 result
->offset
= obstack_object_size (cpool
);
17277 obstack_grow_str0 (cpool
, str
);
17280 return result
->offset
;
17283 /* An entry in the symbol table. */
17284 struct symtab_index_entry
17286 /* The name of the symbol. */
17288 /* The offset of the name in the constant pool. */
17289 offset_type index_offset
;
17290 /* A sorted vector of the indices of all the CUs that hold an object
17292 VEC (offset_type
) *cu_indices
;
17295 /* The symbol table. This is a power-of-2-sized hash table. */
17296 struct mapped_symtab
17298 offset_type n_elements
;
17300 struct symtab_index_entry
**data
;
17303 /* Hash function for a symtab_index_entry. */
17306 hash_symtab_entry (const void *e
)
17308 const struct symtab_index_entry
*entry
= e
;
17309 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
17310 sizeof (offset_type
) * VEC_length (offset_type
,
17311 entry
->cu_indices
),
17315 /* Equality function for a symtab_index_entry. */
17318 eq_symtab_entry (const void *a
, const void *b
)
17320 const struct symtab_index_entry
*ea
= a
;
17321 const struct symtab_index_entry
*eb
= b
;
17322 int len
= VEC_length (offset_type
, ea
->cu_indices
);
17323 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
17325 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
17326 VEC_address (offset_type
, eb
->cu_indices
),
17327 sizeof (offset_type
) * len
);
17330 /* Destroy a symtab_index_entry. */
17333 delete_symtab_entry (void *p
)
17335 struct symtab_index_entry
*entry
= p
;
17336 VEC_free (offset_type
, entry
->cu_indices
);
17340 /* Create a hash table holding symtab_index_entry objects. */
17343 create_symbol_hash_table (void)
17345 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
17346 delete_symtab_entry
, xcalloc
, xfree
);
17349 /* Create a new mapped symtab object. */
17351 static struct mapped_symtab
*
17352 create_mapped_symtab (void)
17354 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
17355 symtab
->n_elements
= 0;
17356 symtab
->size
= 1024;
17357 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
17361 /* Destroy a mapped_symtab. */
17364 cleanup_mapped_symtab (void *p
)
17366 struct mapped_symtab
*symtab
= p
;
17367 /* The contents of the array are freed when the other hash table is
17369 xfree (symtab
->data
);
17373 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
17376 Function is used only during write_hash_table so no index format backward
17377 compatibility is needed. */
17379 static struct symtab_index_entry
**
17380 find_slot (struct mapped_symtab
*symtab
, const char *name
)
17382 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
17384 index
= hash
& (symtab
->size
- 1);
17385 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
17389 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
17390 return &symtab
->data
[index
];
17391 index
= (index
+ step
) & (symtab
->size
- 1);
17395 /* Expand SYMTAB's hash table. */
17398 hash_expand (struct mapped_symtab
*symtab
)
17400 offset_type old_size
= symtab
->size
;
17402 struct symtab_index_entry
**old_entries
= symtab
->data
;
17405 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
17407 for (i
= 0; i
< old_size
; ++i
)
17409 if (old_entries
[i
])
17411 struct symtab_index_entry
**slot
= find_slot (symtab
,
17412 old_entries
[i
]->name
);
17413 *slot
= old_entries
[i
];
17417 xfree (old_entries
);
17420 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
17421 is the index of the CU in which the symbol appears. */
17424 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
17425 offset_type cu_index
)
17427 struct symtab_index_entry
**slot
;
17429 ++symtab
->n_elements
;
17430 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
17431 hash_expand (symtab
);
17433 slot
= find_slot (symtab
, name
);
17436 *slot
= XNEW (struct symtab_index_entry
);
17437 (*slot
)->name
= name
;
17438 (*slot
)->cu_indices
= NULL
;
17440 /* Don't push an index twice. Due to how we add entries we only
17441 have to check the last one. */
17442 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
17443 || VEC_last (offset_type
, (*slot
)->cu_indices
) != cu_index
)
17444 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
17447 /* Add a vector of indices to the constant pool. */
17450 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
17451 struct symtab_index_entry
*entry
)
17455 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
17458 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
17459 offset_type val
= MAYBE_SWAP (len
);
17464 entry
->index_offset
= obstack_object_size (cpool
);
17466 obstack_grow (cpool
, &val
, sizeof (val
));
17468 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
17471 val
= MAYBE_SWAP (iter
);
17472 obstack_grow (cpool
, &val
, sizeof (val
));
17477 struct symtab_index_entry
*old_entry
= *slot
;
17478 entry
->index_offset
= old_entry
->index_offset
;
17481 return entry
->index_offset
;
17484 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
17485 constant pool entries going into the obstack CPOOL. */
17488 write_hash_table (struct mapped_symtab
*symtab
,
17489 struct obstack
*output
, struct obstack
*cpool
)
17492 htab_t symbol_hash_table
;
17495 symbol_hash_table
= create_symbol_hash_table ();
17496 str_table
= create_strtab ();
17498 /* We add all the index vectors to the constant pool first, to
17499 ensure alignment is ok. */
17500 for (i
= 0; i
< symtab
->size
; ++i
)
17502 if (symtab
->data
[i
])
17503 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
17506 /* Now write out the hash table. */
17507 for (i
= 0; i
< symtab
->size
; ++i
)
17509 offset_type str_off
, vec_off
;
17511 if (symtab
->data
[i
])
17513 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
17514 vec_off
= symtab
->data
[i
]->index_offset
;
17518 /* While 0 is a valid constant pool index, it is not valid
17519 to have 0 for both offsets. */
17524 str_off
= MAYBE_SWAP (str_off
);
17525 vec_off
= MAYBE_SWAP (vec_off
);
17527 obstack_grow (output
, &str_off
, sizeof (str_off
));
17528 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
17531 htab_delete (str_table
);
17532 htab_delete (symbol_hash_table
);
17535 /* Struct to map psymtab to CU index in the index file. */
17536 struct psymtab_cu_index_map
17538 struct partial_symtab
*psymtab
;
17539 unsigned int cu_index
;
17543 hash_psymtab_cu_index (const void *item
)
17545 const struct psymtab_cu_index_map
*map
= item
;
17547 return htab_hash_pointer (map
->psymtab
);
17551 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
17553 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
17554 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
17556 return lhs
->psymtab
== rhs
->psymtab
;
17559 /* Helper struct for building the address table. */
17560 struct addrmap_index_data
17562 struct objfile
*objfile
;
17563 struct obstack
*addr_obstack
;
17564 htab_t cu_index_htab
;
17566 /* Non-zero if the previous_* fields are valid.
17567 We can't write an entry until we see the next entry (since it is only then
17568 that we know the end of the entry). */
17569 int previous_valid
;
17570 /* Index of the CU in the table of all CUs in the index file. */
17571 unsigned int previous_cu_index
;
17572 /* Start address of the CU. */
17573 CORE_ADDR previous_cu_start
;
17576 /* Write an address entry to OBSTACK. */
17579 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
17580 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
17582 offset_type cu_index_to_write
;
17584 CORE_ADDR baseaddr
;
17586 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17588 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
17589 obstack_grow (obstack
, addr
, 8);
17590 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
17591 obstack_grow (obstack
, addr
, 8);
17592 cu_index_to_write
= MAYBE_SWAP (cu_index
);
17593 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
17596 /* Worker function for traversing an addrmap to build the address table. */
17599 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
17601 struct addrmap_index_data
*data
= datap
;
17602 struct partial_symtab
*pst
= obj
;
17604 if (data
->previous_valid
)
17605 add_address_entry (data
->objfile
, data
->addr_obstack
,
17606 data
->previous_cu_start
, start_addr
,
17607 data
->previous_cu_index
);
17609 data
->previous_cu_start
= start_addr
;
17612 struct psymtab_cu_index_map find_map
, *map
;
17613 find_map
.psymtab
= pst
;
17614 map
= htab_find (data
->cu_index_htab
, &find_map
);
17615 gdb_assert (map
!= NULL
);
17616 data
->previous_cu_index
= map
->cu_index
;
17617 data
->previous_valid
= 1;
17620 data
->previous_valid
= 0;
17625 /* Write OBJFILE's address map to OBSTACK.
17626 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
17627 in the index file. */
17630 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
17631 htab_t cu_index_htab
)
17633 struct addrmap_index_data addrmap_index_data
;
17635 /* When writing the address table, we have to cope with the fact that
17636 the addrmap iterator only provides the start of a region; we have to
17637 wait until the next invocation to get the start of the next region. */
17639 addrmap_index_data
.objfile
= objfile
;
17640 addrmap_index_data
.addr_obstack
= obstack
;
17641 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
17642 addrmap_index_data
.previous_valid
= 0;
17644 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
17645 &addrmap_index_data
);
17647 /* It's highly unlikely the last entry (end address = 0xff...ff)
17648 is valid, but we should still handle it.
17649 The end address is recorded as the start of the next region, but that
17650 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
17652 if (addrmap_index_data
.previous_valid
)
17653 add_address_entry (objfile
, obstack
,
17654 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
17655 addrmap_index_data
.previous_cu_index
);
17658 /* Add a list of partial symbols to SYMTAB. */
17661 write_psymbols (struct mapped_symtab
*symtab
,
17663 struct partial_symbol
**psymp
,
17665 offset_type cu_index
,
17668 for (; count
-- > 0; ++psymp
)
17670 void **slot
, *lookup
;
17672 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
17673 error (_("Ada is not currently supported by the index"));
17675 /* We only want to add a given psymbol once. However, we also
17676 want to account for whether it is global or static. So, we
17677 may add it twice, using slightly different values. */
17680 uintptr_t val
= 1 | (uintptr_t) *psymp
;
17682 lookup
= (void *) val
;
17687 /* Only add a given psymbol once. */
17688 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
17692 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (*psymp
), cu_index
);
17697 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
17698 exception if there is an error. */
17701 write_obstack (FILE *file
, struct obstack
*obstack
)
17703 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
17705 != obstack_object_size (obstack
))
17706 error (_("couldn't data write to file"));
17709 /* Unlink a file if the argument is not NULL. */
17712 unlink_if_set (void *p
)
17714 char **filename
= p
;
17716 unlink (*filename
);
17719 /* A helper struct used when iterating over debug_types. */
17720 struct signatured_type_index_data
17722 struct objfile
*objfile
;
17723 struct mapped_symtab
*symtab
;
17724 struct obstack
*types_list
;
17729 /* A helper function that writes a single signatured_type to an
17733 write_one_signatured_type (void **slot
, void *d
)
17735 struct signatured_type_index_data
*info
= d
;
17736 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
17737 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
17738 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
17741 write_psymbols (info
->symtab
,
17743 info
->objfile
->global_psymbols
.list
17744 + psymtab
->globals_offset
,
17745 psymtab
->n_global_syms
, info
->cu_index
,
17747 write_psymbols (info
->symtab
,
17749 info
->objfile
->static_psymbols
.list
17750 + psymtab
->statics_offset
,
17751 psymtab
->n_static_syms
, info
->cu_index
,
17754 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
17755 entry
->per_cu
.offset
.sect_off
);
17756 obstack_grow (info
->types_list
, val
, 8);
17757 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
17758 entry
->type_offset_in_tu
.cu_off
);
17759 obstack_grow (info
->types_list
, val
, 8);
17760 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
17761 obstack_grow (info
->types_list
, val
, 8);
17768 /* Recurse into all "included" dependencies and write their symbols as
17769 if they appeared in this psymtab. */
17772 recursively_write_psymbols (struct objfile
*objfile
,
17773 struct partial_symtab
*psymtab
,
17774 struct mapped_symtab
*symtab
,
17776 offset_type cu_index
)
17780 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
17781 if (psymtab
->dependencies
[i
]->user
!= NULL
)
17782 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
17783 symtab
, psyms_seen
, cu_index
);
17785 write_psymbols (symtab
,
17787 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
17788 psymtab
->n_global_syms
, cu_index
,
17790 write_psymbols (symtab
,
17792 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
17793 psymtab
->n_static_syms
, cu_index
,
17797 /* Create an index file for OBJFILE in the directory DIR. */
17800 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
17802 struct cleanup
*cleanup
;
17803 char *filename
, *cleanup_filename
;
17804 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
17805 struct obstack cu_list
, types_cu_list
;
17808 struct mapped_symtab
*symtab
;
17809 offset_type val
, size_of_contents
, total_len
;
17812 htab_t cu_index_htab
;
17813 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
17815 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
17818 if (dwarf2_per_objfile
->using_index
)
17819 error (_("Cannot use an index to create the index"));
17821 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
17822 error (_("Cannot make an index when the file has multiple .debug_types sections"));
17824 if (stat (objfile
->name
, &st
) < 0)
17825 perror_with_name (objfile
->name
);
17827 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
17828 INDEX_SUFFIX
, (char *) NULL
);
17829 cleanup
= make_cleanup (xfree
, filename
);
17831 out_file
= fopen (filename
, "wb");
17833 error (_("Can't open `%s' for writing"), filename
);
17835 cleanup_filename
= filename
;
17836 make_cleanup (unlink_if_set
, &cleanup_filename
);
17838 symtab
= create_mapped_symtab ();
17839 make_cleanup (cleanup_mapped_symtab
, symtab
);
17841 obstack_init (&addr_obstack
);
17842 make_cleanup_obstack_free (&addr_obstack
);
17844 obstack_init (&cu_list
);
17845 make_cleanup_obstack_free (&cu_list
);
17847 obstack_init (&types_cu_list
);
17848 make_cleanup_obstack_free (&types_cu_list
);
17850 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
17851 NULL
, xcalloc
, xfree
);
17852 make_cleanup_htab_delete (psyms_seen
);
17854 /* While we're scanning CU's create a table that maps a psymtab pointer
17855 (which is what addrmap records) to its index (which is what is recorded
17856 in the index file). This will later be needed to write the address
17858 cu_index_htab
= htab_create_alloc (100,
17859 hash_psymtab_cu_index
,
17860 eq_psymtab_cu_index
,
17861 NULL
, xcalloc
, xfree
);
17862 make_cleanup_htab_delete (cu_index_htab
);
17863 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
17864 xmalloc (sizeof (struct psymtab_cu_index_map
)
17865 * dwarf2_per_objfile
->n_comp_units
);
17866 make_cleanup (xfree
, psymtab_cu_index_map
);
17868 /* The CU list is already sorted, so we don't need to do additional
17869 work here. Also, the debug_types entries do not appear in
17870 all_comp_units, but only in their own hash table. */
17871 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
17873 struct dwarf2_per_cu_data
*per_cu
17874 = dwarf2_per_objfile
->all_comp_units
[i
];
17875 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
17877 struct psymtab_cu_index_map
*map
;
17880 if (psymtab
->user
== NULL
)
17881 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
17883 map
= &psymtab_cu_index_map
[i
];
17884 map
->psymtab
= psymtab
;
17886 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
17887 gdb_assert (slot
!= NULL
);
17888 gdb_assert (*slot
== NULL
);
17891 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
17892 per_cu
->offset
.sect_off
);
17893 obstack_grow (&cu_list
, val
, 8);
17894 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
17895 obstack_grow (&cu_list
, val
, 8);
17898 /* Dump the address map. */
17899 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
17901 /* Write out the .debug_type entries, if any. */
17902 if (dwarf2_per_objfile
->signatured_types
)
17904 struct signatured_type_index_data sig_data
;
17906 sig_data
.objfile
= objfile
;
17907 sig_data
.symtab
= symtab
;
17908 sig_data
.types_list
= &types_cu_list
;
17909 sig_data
.psyms_seen
= psyms_seen
;
17910 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
17911 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
17912 write_one_signatured_type
, &sig_data
);
17915 obstack_init (&constant_pool
);
17916 make_cleanup_obstack_free (&constant_pool
);
17917 obstack_init (&symtab_obstack
);
17918 make_cleanup_obstack_free (&symtab_obstack
);
17919 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
17921 obstack_init (&contents
);
17922 make_cleanup_obstack_free (&contents
);
17923 size_of_contents
= 6 * sizeof (offset_type
);
17924 total_len
= size_of_contents
;
17926 /* The version number. */
17927 val
= MAYBE_SWAP (6);
17928 obstack_grow (&contents
, &val
, sizeof (val
));
17930 /* The offset of the CU list from the start of the file. */
17931 val
= MAYBE_SWAP (total_len
);
17932 obstack_grow (&contents
, &val
, sizeof (val
));
17933 total_len
+= obstack_object_size (&cu_list
);
17935 /* The offset of the types CU list from the start of the file. */
17936 val
= MAYBE_SWAP (total_len
);
17937 obstack_grow (&contents
, &val
, sizeof (val
));
17938 total_len
+= obstack_object_size (&types_cu_list
);
17940 /* The offset of the address table from the start of the file. */
17941 val
= MAYBE_SWAP (total_len
);
17942 obstack_grow (&contents
, &val
, sizeof (val
));
17943 total_len
+= obstack_object_size (&addr_obstack
);
17945 /* The offset of the symbol table from the start of the file. */
17946 val
= MAYBE_SWAP (total_len
);
17947 obstack_grow (&contents
, &val
, sizeof (val
));
17948 total_len
+= obstack_object_size (&symtab_obstack
);
17950 /* The offset of the constant pool from the start of the file. */
17951 val
= MAYBE_SWAP (total_len
);
17952 obstack_grow (&contents
, &val
, sizeof (val
));
17953 total_len
+= obstack_object_size (&constant_pool
);
17955 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
17957 write_obstack (out_file
, &contents
);
17958 write_obstack (out_file
, &cu_list
);
17959 write_obstack (out_file
, &types_cu_list
);
17960 write_obstack (out_file
, &addr_obstack
);
17961 write_obstack (out_file
, &symtab_obstack
);
17962 write_obstack (out_file
, &constant_pool
);
17966 /* We want to keep the file, so we set cleanup_filename to NULL
17967 here. See unlink_if_set. */
17968 cleanup_filename
= NULL
;
17970 do_cleanups (cleanup
);
17973 /* Implementation of the `save gdb-index' command.
17975 Note that the file format used by this command is documented in the
17976 GDB manual. Any changes here must be documented there. */
17979 save_gdb_index_command (char *arg
, int from_tty
)
17981 struct objfile
*objfile
;
17984 error (_("usage: save gdb-index DIRECTORY"));
17986 ALL_OBJFILES (objfile
)
17990 /* If the objfile does not correspond to an actual file, skip it. */
17991 if (stat (objfile
->name
, &st
) < 0)
17994 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
17995 if (dwarf2_per_objfile
)
17997 volatile struct gdb_exception except
;
17999 TRY_CATCH (except
, RETURN_MASK_ERROR
)
18001 write_psymtabs_to_index (objfile
, arg
);
18003 if (except
.reason
< 0)
18004 exception_fprintf (gdb_stderr
, except
,
18005 _("Error while writing index for `%s': "),
18013 int dwarf2_always_disassemble
;
18016 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
18017 struct cmd_list_element
*c
, const char *value
)
18019 fprintf_filtered (file
,
18020 _("Whether to always disassemble "
18021 "DWARF expressions is %s.\n"),
18026 show_check_physname (struct ui_file
*file
, int from_tty
,
18027 struct cmd_list_element
*c
, const char *value
)
18029 fprintf_filtered (file
,
18030 _("Whether to check \"physname\" is %s.\n"),
18034 void _initialize_dwarf2_read (void);
18037 _initialize_dwarf2_read (void)
18039 struct cmd_list_element
*c
;
18041 dwarf2_objfile_data_key
18042 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
18044 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
18045 Set DWARF 2 specific variables.\n\
18046 Configure DWARF 2 variables such as the cache size"),
18047 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
18048 0/*allow-unknown*/, &maintenance_set_cmdlist
);
18050 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
18051 Show DWARF 2 specific variables\n\
18052 Show DWARF 2 variables such as the cache size"),
18053 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
18054 0/*allow-unknown*/, &maintenance_show_cmdlist
);
18056 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
18057 &dwarf2_max_cache_age
, _("\
18058 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
18059 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
18060 A higher limit means that cached compilation units will be stored\n\
18061 in memory longer, and more total memory will be used. Zero disables\n\
18062 caching, which can slow down startup."),
18064 show_dwarf2_max_cache_age
,
18065 &set_dwarf2_cmdlist
,
18066 &show_dwarf2_cmdlist
);
18068 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
18069 &dwarf2_always_disassemble
, _("\
18070 Set whether `info address' always disassembles DWARF expressions."), _("\
18071 Show whether `info address' always disassembles DWARF expressions."), _("\
18072 When enabled, DWARF expressions are always printed in an assembly-like\n\
18073 syntax. When disabled, expressions will be printed in a more\n\
18074 conversational style, when possible."),
18076 show_dwarf2_always_disassemble
,
18077 &set_dwarf2_cmdlist
,
18078 &show_dwarf2_cmdlist
);
18080 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
18081 Set debugging of the dwarf2 DIE reader."), _("\
18082 Show debugging of the dwarf2 DIE reader."), _("\
18083 When enabled (non-zero), DIEs are dumped after they are read in.\n\
18084 The value is the maximum depth to print."),
18087 &setdebuglist
, &showdebuglist
);
18089 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
18090 Set cross-checking of \"physname\" code against demangler."), _("\
18091 Show cross-checking of \"physname\" code against demangler."), _("\
18092 When enabled, GDB's internal \"physname\" code is checked against\n\
18094 NULL
, show_check_physname
,
18095 &setdebuglist
, &showdebuglist
);
18097 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
18099 Save a gdb-index file.\n\
18100 Usage: save gdb-index DIRECTORY"),
18102 set_cmd_completer (c
, filename_completer
);