1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol
*symbolp
;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length
; /* length of the .debug_info
86 unsigned short version
; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
89 unsigned char addr_size
; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length
; /* byte length of the statement
102 unsigned short version
; /* version number -- 2 for DWARF
104 unsigned int prologue_length
; /* # bytes between prologue &
106 unsigned char minimum_instruction_length
; /* byte size of
108 unsigned char default_is_stmt
; /* initial value of is_stmt
111 unsigned char line_range
;
112 unsigned char opcode_base
; /* number assigned to first special
114 unsigned char *standard_opcode_lengths
;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug
= 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info
;
129 static const struct objfile_data
*dwarf2_objfile_data_key
;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type
;
145 DEF_VEC_I (offset_type
);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte
*address_table
;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size
;
157 /* The symbol table, implemented as a hash table. */
158 const offset_type
*symbol_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type symbol_table_slots
;
161 /* A pointer to the constant pool. */
162 const char *constant_pool
;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info
;
168 struct dwarf2_section_info abbrev
;
169 struct dwarf2_section_info line
;
170 struct dwarf2_section_info loc
;
171 struct dwarf2_section_info macinfo
;
172 struct dwarf2_section_info str
;
173 struct dwarf2_section_info ranges
;
174 struct dwarf2_section_info types
;
175 struct dwarf2_section_info frame
;
176 struct dwarf2_section_info eh_frame
;
177 struct dwarf2_section_info gdb_index
;
180 struct objfile
*objfile
;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data
**all_comp_units
;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units
;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data
**type_comp_units
;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data
*read_in_chain
;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types
;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero
;
207 /* True if we are using the mapped index,
208 or we are faking it for OBJF_READNOW's sake. */
209 unsigned char using_index
;
211 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
212 struct mapped_index
*index_table
;
214 /* When using index_table, this keeps track of all quick_file_names entries.
215 TUs can share line table entries with CUs or other TUs, and there can be
216 a lot more TUs than unique line tables, so we maintain a separate table
217 of all line table entries to support the sharing. */
218 htab_t quick_file_names_table
;
220 /* Set during partial symbol reading, to prevent queueing of full
222 int reading_partial_symbols
;
224 /* Table mapping type .debug_info DIE offsets to types.
225 This is NULL if not allocated yet.
226 It (currently) makes sense to allocate debug_types_type_hash lazily.
227 To keep things simple we allocate both lazily. */
228 htab_t debug_info_type_hash
;
230 /* Table mapping type .debug_types DIE offsets to types.
231 This is NULL if not allocated yet. */
232 htab_t debug_types_type_hash
;
235 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
237 /* names of the debugging sections */
239 /* Note that if the debugging section has been compressed, it might
240 have a name like .zdebug_info. */
242 #define INFO_SECTION "debug_info"
243 #define ABBREV_SECTION "debug_abbrev"
244 #define LINE_SECTION "debug_line"
245 #define LOC_SECTION "debug_loc"
246 #define MACINFO_SECTION "debug_macinfo"
247 #define STR_SECTION "debug_str"
248 #define RANGES_SECTION "debug_ranges"
249 #define TYPES_SECTION "debug_types"
250 #define FRAME_SECTION "debug_frame"
251 #define EH_FRAME_SECTION "eh_frame"
252 #define GDB_INDEX_SECTION "gdb_index"
254 /* local data types */
256 /* We hold several abbreviation tables in memory at the same time. */
257 #ifndef ABBREV_HASH_SIZE
258 #define ABBREV_HASH_SIZE 121
261 /* The data in a compilation unit header, after target2host
262 translation, looks like this. */
263 struct comp_unit_head
267 unsigned char addr_size
;
268 unsigned char signed_addr_p
;
269 unsigned int abbrev_offset
;
271 /* Size of file offsets; either 4 or 8. */
272 unsigned int offset_size
;
274 /* Size of the length field; either 4 or 12. */
275 unsigned int initial_length_size
;
277 /* Offset to the first byte of this compilation unit header in the
278 .debug_info section, for resolving relative reference dies. */
281 /* Offset to first die in this cu from the start of the cu.
282 This will be the first byte following the compilation unit header. */
283 unsigned int first_die_offset
;
286 /* Type used for delaying computation of method physnames.
287 See comments for compute_delayed_physnames. */
288 struct delayed_method_info
290 /* The type to which the method is attached, i.e., its parent class. */
293 /* The index of the method in the type's function fieldlists. */
296 /* The index of the method in the fieldlist. */
299 /* The name of the DIE. */
302 /* The DIE associated with this method. */
303 struct die_info
*die
;
306 typedef struct delayed_method_info delayed_method_info
;
307 DEF_VEC_O (delayed_method_info
);
309 /* Internal state when decoding a particular compilation unit. */
312 /* The objfile containing this compilation unit. */
313 struct objfile
*objfile
;
315 /* The header of the compilation unit. */
316 struct comp_unit_head header
;
318 /* Base address of this compilation unit. */
319 CORE_ADDR base_address
;
321 /* Non-zero if base_address has been set. */
324 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
326 /* The language we are debugging. */
327 enum language language
;
328 const struct language_defn
*language_defn
;
330 const char *producer
;
332 /* The generic symbol table building routines have separate lists for
333 file scope symbols and all all other scopes (local scopes). So
334 we need to select the right one to pass to add_symbol_to_list().
335 We do it by keeping a pointer to the correct list in list_in_scope.
337 FIXME: The original dwarf code just treated the file scope as the
338 first local scope, and all other local scopes as nested local
339 scopes, and worked fine. Check to see if we really need to
340 distinguish these in buildsym.c. */
341 struct pending
**list_in_scope
;
343 /* DWARF abbreviation table associated with this compilation unit. */
344 struct abbrev_info
**dwarf2_abbrevs
;
346 /* Storage for the abbrev table. */
347 struct obstack abbrev_obstack
;
349 /* Hash table holding all the loaded partial DIEs. */
352 /* Storage for things with the same lifetime as this read-in compilation
353 unit, including partial DIEs. */
354 struct obstack comp_unit_obstack
;
356 /* When multiple dwarf2_cu structures are living in memory, this field
357 chains them all together, so that they can be released efficiently.
358 We will probably also want a generation counter so that most-recently-used
359 compilation units are cached... */
360 struct dwarf2_per_cu_data
*read_in_chain
;
362 /* Backchain to our per_cu entry if the tree has been built. */
363 struct dwarf2_per_cu_data
*per_cu
;
365 /* How many compilation units ago was this CU last referenced? */
368 /* A hash table of die offsets for following references. */
371 /* Full DIEs if read in. */
372 struct die_info
*dies
;
374 /* A set of pointers to dwarf2_per_cu_data objects for compilation
375 units referenced by this one. Only set during full symbol processing;
376 partial symbol tables do not have dependencies. */
379 /* Header data from the line table, during full symbol processing. */
380 struct line_header
*line_header
;
382 /* A list of methods which need to have physnames computed
383 after all type information has been read. */
384 VEC (delayed_method_info
) *method_list
;
386 /* Mark used when releasing cached dies. */
387 unsigned int mark
: 1;
389 /* This flag will be set if this compilation unit might include
390 inter-compilation-unit references. */
391 unsigned int has_form_ref_addr
: 1;
393 /* This flag will be set if this compilation unit includes any
394 DW_TAG_namespace DIEs. If we know that there are explicit
395 DIEs for namespaces, we don't need to try to infer them
396 from mangled names. */
397 unsigned int has_namespace_info
: 1;
400 /* Persistent data held for a compilation unit, even when not
401 processing it. We put a pointer to this structure in the
402 read_symtab_private field of the psymtab. If we encounter
403 inter-compilation-unit references, we also maintain a sorted
404 list of all compilation units. */
406 struct dwarf2_per_cu_data
408 /* The start offset and length of this compilation unit. 2**29-1
409 bytes should suffice to store the length of any compilation unit
410 - if it doesn't, GDB will fall over anyway.
411 NOTE: Unlike comp_unit_head.length, this length includes
412 initial_length_size. */
414 unsigned int length
: 29;
416 /* Flag indicating this compilation unit will be read in before
417 any of the current compilation units are processed. */
418 unsigned int queued
: 1;
420 /* This flag will be set if we need to load absolutely all DIEs
421 for this compilation unit, instead of just the ones we think
422 are interesting. It gets set if we look for a DIE in the
423 hash table and don't find it. */
424 unsigned int load_all_dies
: 1;
426 /* Non-zero if this CU is from .debug_types.
427 Otherwise it's from .debug_info. */
428 unsigned int from_debug_types
: 1;
430 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
431 of the CU cache it gets reset to NULL again. */
432 struct dwarf2_cu
*cu
;
434 /* The corresponding objfile. */
435 struct objfile
*objfile
;
437 /* When using partial symbol tables, the 'psymtab' field is active.
438 Otherwise the 'quick' field is active. */
441 /* The partial symbol table associated with this compilation unit,
442 or NULL for partial units (which do not have an associated
444 struct partial_symtab
*psymtab
;
446 /* Data needed by the "quick" functions. */
447 struct dwarf2_per_cu_quick_data
*quick
;
451 /* Entry in the signatured_types hash table. */
453 struct signatured_type
457 /* Offset in .debug_types of the TU (type_unit) for this type. */
460 /* Offset in .debug_types of the type defined by this TU. */
461 unsigned int type_offset
;
463 /* The CU(/TU) of this type. */
464 struct dwarf2_per_cu_data per_cu
;
467 /* Struct used to pass misc. parameters to read_die_and_children, et
468 al. which are used for both .debug_info and .debug_types dies.
469 All parameters here are unchanging for the life of the call. This
470 struct exists to abstract away the constant parameters of die
473 struct die_reader_specs
475 /* The bfd of this objfile. */
478 /* The CU of the DIE we are parsing. */
479 struct dwarf2_cu
*cu
;
481 /* Pointer to start of section buffer.
482 This is either the start of .debug_info or .debug_types. */
483 const gdb_byte
*buffer
;
486 /* The line number information for a compilation unit (found in the
487 .debug_line section) begins with a "statement program header",
488 which contains the following information. */
491 unsigned int total_length
;
492 unsigned short version
;
493 unsigned int header_length
;
494 unsigned char minimum_instruction_length
;
495 unsigned char maximum_ops_per_instruction
;
496 unsigned char default_is_stmt
;
498 unsigned char line_range
;
499 unsigned char opcode_base
;
501 /* standard_opcode_lengths[i] is the number of operands for the
502 standard opcode whose value is i. This means that
503 standard_opcode_lengths[0] is unused, and the last meaningful
504 element is standard_opcode_lengths[opcode_base - 1]. */
505 unsigned char *standard_opcode_lengths
;
507 /* The include_directories table. NOTE! These strings are not
508 allocated with xmalloc; instead, they are pointers into
509 debug_line_buffer. If you try to free them, `free' will get
511 unsigned int num_include_dirs
, include_dirs_size
;
514 /* The file_names table. NOTE! These strings are not allocated
515 with xmalloc; instead, they are pointers into debug_line_buffer.
516 Don't try to free them directly. */
517 unsigned int num_file_names
, file_names_size
;
521 unsigned int dir_index
;
522 unsigned int mod_time
;
524 int included_p
; /* Non-zero if referenced by the Line Number Program. */
525 struct symtab
*symtab
; /* The associated symbol table, if any. */
528 /* The start and end of the statement program following this
529 header. These point into dwarf2_per_objfile->line_buffer. */
530 gdb_byte
*statement_program_start
, *statement_program_end
;
533 /* When we construct a partial symbol table entry we only
534 need this much information. */
535 struct partial_die_info
537 /* Offset of this DIE. */
540 /* DWARF-2 tag for this DIE. */
541 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
543 /* Assorted flags describing the data found in this DIE. */
544 unsigned int has_children
: 1;
545 unsigned int is_external
: 1;
546 unsigned int is_declaration
: 1;
547 unsigned int has_type
: 1;
548 unsigned int has_specification
: 1;
549 unsigned int has_pc_info
: 1;
551 /* Flag set if the SCOPE field of this structure has been
553 unsigned int scope_set
: 1;
555 /* Flag set if the DIE has a byte_size attribute. */
556 unsigned int has_byte_size
: 1;
558 /* Flag set if any of the DIE's children are template arguments. */
559 unsigned int has_template_arguments
: 1;
561 /* Flag set if fixup_partial_die has been called on this die. */
562 unsigned int fixup_called
: 1;
564 /* The name of this DIE. Normally the value of DW_AT_name, but
565 sometimes a default name for unnamed DIEs. */
568 /* The linkage name, if present. */
569 const char *linkage_name
;
571 /* The scope to prepend to our children. This is generally
572 allocated on the comp_unit_obstack, so will disappear
573 when this compilation unit leaves the cache. */
576 /* The location description associated with this DIE, if any. */
577 struct dwarf_block
*locdesc
;
579 /* If HAS_PC_INFO, the PC range associated with this DIE. */
583 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
584 DW_AT_sibling, if any. */
585 /* NOTE: This member isn't strictly necessary, read_partial_die could
586 return DW_AT_sibling values to its caller load_partial_dies. */
589 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
590 DW_AT_specification (or DW_AT_abstract_origin or
592 unsigned int spec_offset
;
594 /* Pointers to this DIE's parent, first child, and next sibling,
596 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
599 /* This data structure holds the information of an abbrev. */
602 unsigned int number
; /* number identifying abbrev */
603 enum dwarf_tag tag
; /* dwarf tag */
604 unsigned short has_children
; /* boolean */
605 unsigned short num_attrs
; /* number of attributes */
606 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
607 struct abbrev_info
*next
; /* next in chain */
612 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
613 ENUM_BITFIELD(dwarf_form
) form
: 16;
616 /* Attributes have a name and a value. */
619 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
620 ENUM_BITFIELD(dwarf_form
) form
: 15;
622 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
623 field should be in u.str (existing only for DW_STRING) but it is kept
624 here for better struct attribute alignment. */
625 unsigned int string_is_canonical
: 1;
630 struct dwarf_block
*blk
;
634 struct signatured_type
*signatured_type
;
639 /* This data structure holds a complete die structure. */
642 /* DWARF-2 tag for this DIE. */
643 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
645 /* Number of attributes */
646 unsigned char num_attrs
;
648 /* True if we're presently building the full type name for the
649 type derived from this DIE. */
650 unsigned char building_fullname
: 1;
655 /* Offset in .debug_info or .debug_types section. */
658 /* The dies in a compilation unit form an n-ary tree. PARENT
659 points to this die's parent; CHILD points to the first child of
660 this node; and all the children of a given node are chained
661 together via their SIBLING fields. */
662 struct die_info
*child
; /* Its first child, if any. */
663 struct die_info
*sibling
; /* Its next sibling, if any. */
664 struct die_info
*parent
; /* Its parent, if any. */
666 /* An array of attributes, with NUM_ATTRS elements. There may be
667 zero, but it's not common and zero-sized arrays are not
668 sufficiently portable C. */
669 struct attribute attrs
[1];
672 struct function_range
675 CORE_ADDR lowpc
, highpc
;
677 struct function_range
*next
;
680 /* Get at parts of an attribute structure. */
682 #define DW_STRING(attr) ((attr)->u.str)
683 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
684 #define DW_UNSND(attr) ((attr)->u.unsnd)
685 #define DW_BLOCK(attr) ((attr)->u.blk)
686 #define DW_SND(attr) ((attr)->u.snd)
687 #define DW_ADDR(attr) ((attr)->u.addr)
688 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
690 /* Blocks are a bunch of untyped bytes. */
697 #ifndef ATTR_ALLOC_CHUNK
698 #define ATTR_ALLOC_CHUNK 4
701 /* Allocate fields for structs, unions and enums in this size. */
702 #ifndef DW_FIELD_ALLOC_CHUNK
703 #define DW_FIELD_ALLOC_CHUNK 4
706 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
707 but this would require a corresponding change in unpack_field_as_long
709 static int bits_per_byte
= 8;
711 /* The routines that read and process dies for a C struct or C++ class
712 pass lists of data member fields and lists of member function fields
713 in an instance of a field_info structure, as defined below. */
716 /* List of data member and baseclasses fields. */
719 struct nextfield
*next
;
724 *fields
, *baseclasses
;
726 /* Number of fields (including baseclasses). */
729 /* Number of baseclasses. */
732 /* Set if the accesibility of one of the fields is not public. */
733 int non_public_fields
;
735 /* Member function fields array, entries are allocated in the order they
736 are encountered in the object file. */
739 struct nextfnfield
*next
;
740 struct fn_field fnfield
;
744 /* Member function fieldlist array, contains name of possibly overloaded
745 member function, number of overloaded member functions and a pointer
746 to the head of the member function field chain. */
751 struct nextfnfield
*head
;
755 /* Number of entries in the fnfieldlists array. */
758 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
759 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
760 struct typedef_field_list
762 struct typedef_field field
;
763 struct typedef_field_list
*next
;
766 unsigned typedef_field_list_count
;
769 /* One item on the queue of compilation units to read in full symbols
771 struct dwarf2_queue_item
773 struct dwarf2_per_cu_data
*per_cu
;
774 struct dwarf2_queue_item
*next
;
777 /* The current queue. */
778 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
780 /* Loaded secondary compilation units are kept in memory until they
781 have not been referenced for the processing of this many
782 compilation units. Set this to zero to disable caching. Cache
783 sizes of up to at least twenty will improve startup time for
784 typical inter-CU-reference binaries, at an obvious memory cost. */
785 static int dwarf2_max_cache_age
= 5;
787 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
788 struct cmd_list_element
*c
, const char *value
)
790 fprintf_filtered (file
, _("The upper bound on the age of cached "
791 "dwarf2 compilation units is %s.\n"),
796 /* Various complaints about symbol reading that don't abort the process. */
799 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
801 complaint (&symfile_complaints
,
802 _("statement list doesn't fit in .debug_line section"));
806 dwarf2_debug_line_missing_file_complaint (void)
808 complaint (&symfile_complaints
,
809 _(".debug_line section has line data without a file"));
813 dwarf2_debug_line_missing_end_sequence_complaint (void)
815 complaint (&symfile_complaints
,
816 _(".debug_line section has line "
817 "program sequence without an end"));
821 dwarf2_complex_location_expr_complaint (void)
823 complaint (&symfile_complaints
, _("location expression too complex"));
827 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
830 complaint (&symfile_complaints
,
831 _("const value length mismatch for '%s', got %d, expected %d"),
836 dwarf2_macros_too_long_complaint (void)
838 complaint (&symfile_complaints
,
839 _("macro info runs off end of `.debug_macinfo' section"));
843 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
845 complaint (&symfile_complaints
,
846 _("macro debug info contains a "
847 "malformed macro definition:\n`%s'"),
852 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
854 complaint (&symfile_complaints
,
855 _("invalid attribute class or form for '%s' in '%s'"),
859 /* local function prototypes */
861 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
863 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
866 static void dwarf2_build_psymtabs_hard (struct objfile
*);
868 static void scan_partial_symbols (struct partial_die_info
*,
869 CORE_ADDR
*, CORE_ADDR
*,
870 int, struct dwarf2_cu
*);
872 static void add_partial_symbol (struct partial_die_info
*,
875 static void add_partial_namespace (struct partial_die_info
*pdi
,
876 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
877 int need_pc
, struct dwarf2_cu
*cu
);
879 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
880 CORE_ADDR
*highpc
, int need_pc
,
881 struct dwarf2_cu
*cu
);
883 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
884 struct dwarf2_cu
*cu
);
886 static void add_partial_subprogram (struct partial_die_info
*pdi
,
887 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
888 int need_pc
, struct dwarf2_cu
*cu
);
890 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
891 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
892 bfd
*abfd
, struct dwarf2_cu
*cu
);
894 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
896 static void psymtab_to_symtab_1 (struct partial_symtab
*);
898 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
900 static void dwarf2_free_abbrev_table (void *);
902 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
905 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
908 static struct partial_die_info
*load_partial_dies (bfd
*,
909 gdb_byte
*, gdb_byte
*,
910 int, struct dwarf2_cu
*);
912 static gdb_byte
*read_partial_die (struct partial_die_info
*,
913 struct abbrev_info
*abbrev
,
915 gdb_byte
*, gdb_byte
*,
918 static struct partial_die_info
*find_partial_die (unsigned int,
921 static void fixup_partial_die (struct partial_die_info
*,
924 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
925 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
927 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
928 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
930 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
932 static int read_1_signed_byte (bfd
*, gdb_byte
*);
934 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
936 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
938 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
940 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
943 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
945 static LONGEST read_checked_initial_length_and_offset
946 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
947 unsigned int *, unsigned int *);
949 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
952 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
954 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
956 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
958 static char *read_indirect_string (bfd
*, gdb_byte
*,
959 const struct comp_unit_head
*,
962 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
964 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
966 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
968 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
970 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
973 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
977 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
978 struct dwarf2_cu
*cu
);
980 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
982 static struct die_info
*die_specification (struct die_info
*die
,
983 struct dwarf2_cu
**);
985 static void free_line_header (struct line_header
*lh
);
987 static void add_file_name (struct line_header
*, char *, unsigned int,
988 unsigned int, unsigned int);
990 static struct line_header
*(dwarf_decode_line_header
991 (unsigned int offset
,
992 bfd
*abfd
, struct dwarf2_cu
*cu
));
994 static void dwarf_decode_lines (struct line_header
*, const char *, bfd
*,
995 struct dwarf2_cu
*, struct partial_symtab
*);
997 static void dwarf2_start_subfile (char *, const char *, const char *);
999 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1000 struct dwarf2_cu
*);
1002 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1003 struct dwarf2_cu
*, struct symbol
*);
1005 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1006 struct dwarf2_cu
*);
1008 static void dwarf2_const_value_attr (struct attribute
*attr
,
1011 struct obstack
*obstack
,
1012 struct dwarf2_cu
*cu
, long *value
,
1014 struct dwarf2_locexpr_baton
**baton
);
1016 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1018 static int need_gnat_info (struct dwarf2_cu
*);
1020 static struct type
*die_descriptive_type (struct die_info
*,
1021 struct dwarf2_cu
*);
1023 static void set_descriptive_type (struct type
*, struct die_info
*,
1024 struct dwarf2_cu
*);
1026 static struct type
*die_containing_type (struct die_info
*,
1027 struct dwarf2_cu
*);
1029 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1030 struct dwarf2_cu
*);
1032 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1034 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1036 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1038 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1039 const char *suffix
, int physname
,
1040 struct dwarf2_cu
*cu
);
1042 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1044 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1046 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1048 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1050 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1051 struct dwarf2_cu
*, struct partial_symtab
*);
1053 static int dwarf2_get_pc_bounds (struct die_info
*,
1054 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1055 struct partial_symtab
*);
1057 static void get_scope_pc_bounds (struct die_info
*,
1058 CORE_ADDR
*, CORE_ADDR
*,
1059 struct dwarf2_cu
*);
1061 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1062 CORE_ADDR
, struct dwarf2_cu
*);
1064 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1065 struct dwarf2_cu
*);
1067 static void dwarf2_attach_fields_to_type (struct field_info
*,
1068 struct type
*, struct dwarf2_cu
*);
1070 static void dwarf2_add_member_fn (struct field_info
*,
1071 struct die_info
*, struct type
*,
1072 struct dwarf2_cu
*);
1074 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1076 struct dwarf2_cu
*);
1078 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1080 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1082 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1084 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1086 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1088 static struct type
*read_module_type (struct die_info
*die
,
1089 struct dwarf2_cu
*cu
);
1091 static const char *namespace_name (struct die_info
*die
,
1092 int *is_anonymous
, struct dwarf2_cu
*);
1094 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1096 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1098 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1099 struct dwarf2_cu
*);
1101 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1103 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1105 gdb_byte
**new_info_ptr
,
1106 struct die_info
*parent
);
1108 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1110 gdb_byte
**new_info_ptr
,
1111 struct die_info
*parent
);
1113 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1115 gdb_byte
**new_info_ptr
,
1116 struct die_info
*parent
);
1118 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1119 struct die_info
**, gdb_byte
*,
1122 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1124 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1127 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1129 static const char *dwarf2_full_name (char *name
,
1130 struct die_info
*die
,
1131 struct dwarf2_cu
*cu
);
1133 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1134 struct dwarf2_cu
**);
1136 static char *dwarf_tag_name (unsigned int);
1138 static char *dwarf_attr_name (unsigned int);
1140 static char *dwarf_form_name (unsigned int);
1142 static char *dwarf_bool_name (unsigned int);
1144 static char *dwarf_type_encoding_name (unsigned int);
1147 static char *dwarf_cfi_name (unsigned int);
1150 static struct die_info
*sibling_die (struct die_info
*);
1152 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1154 static void dump_die_for_error (struct die_info
*);
1156 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1159 /*static*/ void dump_die (struct die_info
*, int max_level
);
1161 static void store_in_ref_table (struct die_info
*,
1162 struct dwarf2_cu
*);
1164 static int is_ref_attr (struct attribute
*);
1166 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1168 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1170 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1172 struct dwarf2_cu
**);
1174 static struct die_info
*follow_die_ref (struct die_info
*,
1176 struct dwarf2_cu
**);
1178 static struct die_info
*follow_die_sig (struct die_info
*,
1180 struct dwarf2_cu
**);
1182 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1183 unsigned int offset
);
1185 static void read_signatured_type (struct objfile
*,
1186 struct signatured_type
*type_sig
);
1188 /* memory allocation interface */
1190 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1192 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1194 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1196 static void initialize_cu_func_list (struct dwarf2_cu
*);
1198 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1199 struct dwarf2_cu
*);
1201 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1202 char *, bfd
*, struct dwarf2_cu
*);
1204 static int attr_form_is_block (struct attribute
*);
1206 static int attr_form_is_section_offset (struct attribute
*);
1208 static int attr_form_is_constant (struct attribute
*);
1210 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1211 struct dwarf2_loclist_baton
*baton
,
1212 struct attribute
*attr
);
1214 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1216 struct dwarf2_cu
*cu
);
1218 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1219 struct abbrev_info
*abbrev
,
1220 struct dwarf2_cu
*cu
);
1222 static void free_stack_comp_unit (void *);
1224 static hashval_t
partial_die_hash (const void *item
);
1226 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1228 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1229 (unsigned int offset
, struct objfile
*objfile
);
1231 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1232 (unsigned int offset
, struct objfile
*objfile
);
1234 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1235 struct objfile
*objfile
);
1237 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1238 struct die_info
*comp_unit_die
);
1240 static void free_one_comp_unit (void *);
1242 static void free_cached_comp_units (void *);
1244 static void age_cached_comp_units (void);
1246 static void free_one_cached_comp_unit (void *);
1248 static struct type
*set_die_type (struct die_info
*, struct type
*,
1249 struct dwarf2_cu
*);
1251 static void create_all_comp_units (struct objfile
*);
1253 static int create_debug_types_hash_table (struct objfile
*objfile
);
1255 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1258 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1260 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1261 struct dwarf2_per_cu_data
*);
1263 static void dwarf2_mark (struct dwarf2_cu
*);
1265 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1267 static struct type
*get_die_type_at_offset (unsigned int,
1268 struct dwarf2_per_cu_data
*per_cu
);
1270 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1272 static void dwarf2_release_queue (void *dummy
);
1274 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1275 struct objfile
*objfile
);
1277 static void process_queue (struct objfile
*objfile
);
1279 static void find_file_and_directory (struct die_info
*die
,
1280 struct dwarf2_cu
*cu
,
1281 char **name
, char **comp_dir
);
1283 static char *file_full_name (int file
, struct line_header
*lh
,
1284 const char *comp_dir
);
1286 static gdb_byte
*partial_read_comp_unit_head (struct comp_unit_head
*header
,
1289 unsigned int buffer_size
,
1292 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1293 struct dwarf2_cu
*cu
);
1295 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1299 /* Convert VALUE between big- and little-endian. */
1301 byte_swap (offset_type value
)
1305 result
= (value
& 0xff) << 24;
1306 result
|= (value
& 0xff00) << 8;
1307 result
|= (value
& 0xff0000) >> 8;
1308 result
|= (value
& 0xff000000) >> 24;
1312 #define MAYBE_SWAP(V) byte_swap (V)
1315 #define MAYBE_SWAP(V) (V)
1316 #endif /* WORDS_BIGENDIAN */
1318 /* The suffix for an index file. */
1319 #define INDEX_SUFFIX ".gdb-index"
1321 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1322 struct dwarf2_cu
*cu
);
1324 /* Try to locate the sections we need for DWARF 2 debugging
1325 information and return true if we have enough to do something. */
1328 dwarf2_has_info (struct objfile
*objfile
)
1330 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1331 if (!dwarf2_per_objfile
)
1333 /* Initialize per-objfile state. */
1334 struct dwarf2_per_objfile
*data
1335 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1337 memset (data
, 0, sizeof (*data
));
1338 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1339 dwarf2_per_objfile
= data
;
1341 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1342 dwarf2_per_objfile
->objfile
= objfile
;
1344 return (dwarf2_per_objfile
->info
.asection
!= NULL
1345 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1348 /* When loading sections, we can either look for ".<name>", or for
1349 * ".z<name>", which indicates a compressed section. */
1352 section_is_p (const char *section_name
, const char *name
)
1354 return (section_name
[0] == '.'
1355 && (strcmp (section_name
+ 1, name
) == 0
1356 || (section_name
[1] == 'z'
1357 && strcmp (section_name
+ 2, name
) == 0)));
1360 /* This function is mapped across the sections and remembers the
1361 offset and size of each of the debugging sections we are interested
1365 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1367 if (section_is_p (sectp
->name
, INFO_SECTION
))
1369 dwarf2_per_objfile
->info
.asection
= sectp
;
1370 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1372 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1374 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1375 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1377 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1379 dwarf2_per_objfile
->line
.asection
= sectp
;
1380 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1382 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1384 dwarf2_per_objfile
->loc
.asection
= sectp
;
1385 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1387 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1389 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1390 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1392 else if (section_is_p (sectp
->name
, STR_SECTION
))
1394 dwarf2_per_objfile
->str
.asection
= sectp
;
1395 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1397 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1399 dwarf2_per_objfile
->frame
.asection
= sectp
;
1400 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1402 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1404 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1406 if (aflag
& SEC_HAS_CONTENTS
)
1408 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1409 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1412 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1414 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1415 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1417 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1419 dwarf2_per_objfile
->types
.asection
= sectp
;
1420 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1422 else if (section_is_p (sectp
->name
, GDB_INDEX_SECTION
))
1424 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1425 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1428 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1429 && bfd_section_vma (abfd
, sectp
) == 0)
1430 dwarf2_per_objfile
->has_section_at_zero
= 1;
1433 /* Decompress a section that was compressed using zlib. Store the
1434 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1437 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1438 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1440 bfd
*abfd
= objfile
->obfd
;
1442 error (_("Support for zlib-compressed DWARF data (from '%s') "
1443 "is disabled in this copy of GDB"),
1444 bfd_get_filename (abfd
));
1446 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1447 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1448 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1449 bfd_size_type uncompressed_size
;
1450 gdb_byte
*uncompressed_buffer
;
1453 int header_size
= 12;
1455 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1456 || bfd_bread (compressed_buffer
,
1457 compressed_size
, abfd
) != compressed_size
)
1458 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1459 bfd_get_filename (abfd
));
1461 /* Read the zlib header. In this case, it should be "ZLIB" followed
1462 by the uncompressed section size, 8 bytes in big-endian order. */
1463 if (compressed_size
< header_size
1464 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1465 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1466 bfd_get_filename (abfd
));
1467 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1468 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1469 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1470 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1471 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1472 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1473 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1474 uncompressed_size
+= compressed_buffer
[11];
1476 /* It is possible the section consists of several compressed
1477 buffers concatenated together, so we uncompress in a loop. */
1481 strm
.avail_in
= compressed_size
- header_size
;
1482 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1483 strm
.avail_out
= uncompressed_size
;
1484 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1486 rc
= inflateInit (&strm
);
1487 while (strm
.avail_in
> 0)
1490 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1491 bfd_get_filename (abfd
), rc
);
1492 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1493 + (uncompressed_size
- strm
.avail_out
));
1494 rc
= inflate (&strm
, Z_FINISH
);
1495 if (rc
!= Z_STREAM_END
)
1496 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1497 bfd_get_filename (abfd
), rc
);
1498 rc
= inflateReset (&strm
);
1500 rc
= inflateEnd (&strm
);
1502 || strm
.avail_out
!= 0)
1503 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1504 bfd_get_filename (abfd
), rc
);
1506 do_cleanups (cleanup
);
1507 *outbuf
= uncompressed_buffer
;
1508 *outsize
= uncompressed_size
;
1512 /* A helper function that decides whether a section is empty. */
1515 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1517 return info
->asection
== NULL
|| info
->size
== 0;
1520 /* Read the contents of the section SECTP from object file specified by
1521 OBJFILE, store info about the section into INFO.
1522 If the section is compressed, uncompress it before returning. */
1525 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1527 bfd
*abfd
= objfile
->obfd
;
1528 asection
*sectp
= info
->asection
;
1529 gdb_byte
*buf
, *retbuf
;
1530 unsigned char header
[4];
1534 info
->buffer
= NULL
;
1535 info
->was_mmapped
= 0;
1538 if (dwarf2_section_empty_p (info
))
1541 /* Check if the file has a 4-byte header indicating compression. */
1542 if (info
->size
> sizeof (header
)
1543 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1544 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1546 /* Upon decompression, update the buffer and its size. */
1547 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1549 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1557 pagesize
= getpagesize ();
1559 /* Only try to mmap sections which are large enough: we don't want to
1560 waste space due to fragmentation. Also, only try mmap for sections
1561 without relocations. */
1563 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1565 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1566 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1567 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1568 MAP_PRIVATE
, pg_offset
);
1570 if (retbuf
!= MAP_FAILED
)
1572 info
->was_mmapped
= 1;
1573 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1574 #if HAVE_POSIX_MADVISE
1575 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1582 /* If we get here, we are a normal, not-compressed section. */
1584 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1586 /* When debugging .o files, we may need to apply relocations; see
1587 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1588 We never compress sections in .o files, so we only need to
1589 try this when the section is not compressed. */
1590 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1593 info
->buffer
= retbuf
;
1597 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1598 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1599 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1600 bfd_get_filename (abfd
));
1603 /* A helper function that returns the size of a section in a safe way.
1604 If you are positive that the section has been read before using the
1605 size, then it is safe to refer to the dwarf2_section_info object's
1606 "size" field directly. In other cases, you must call this
1607 function, because for compressed sections the size field is not set
1608 correctly until the section has been read. */
1610 static bfd_size_type
1611 dwarf2_section_size (struct objfile
*objfile
,
1612 struct dwarf2_section_info
*info
)
1615 dwarf2_read_section (objfile
, info
);
1619 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1623 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1624 asection
**sectp
, gdb_byte
**bufp
,
1625 bfd_size_type
*sizep
)
1627 struct dwarf2_per_objfile
*data
1628 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1629 struct dwarf2_section_info
*info
;
1631 /* We may see an objfile without any DWARF, in which case we just
1640 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1641 info
= &data
->eh_frame
;
1642 else if (section_is_p (section_name
, FRAME_SECTION
))
1643 info
= &data
->frame
;
1645 gdb_assert_not_reached ("unexpected section");
1647 dwarf2_read_section (objfile
, info
);
1649 *sectp
= info
->asection
;
1650 *bufp
= info
->buffer
;
1651 *sizep
= info
->size
;
1655 /* DWARF quick_symbols_functions support. */
1657 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1658 unique line tables, so we maintain a separate table of all .debug_line
1659 derived entries to support the sharing.
1660 All the quick functions need is the list of file names. We discard the
1661 line_header when we're done and don't need to record it here. */
1662 struct quick_file_names
1664 /* The offset in .debug_line of the line table. We hash on this. */
1665 unsigned int offset
;
1667 /* The number of entries in file_names, real_names. */
1668 unsigned int num_file_names
;
1670 /* The file names from the line table, after being run through
1672 const char **file_names
;
1674 /* The file names from the line table after being run through
1675 gdb_realpath. These are computed lazily. */
1676 const char **real_names
;
1679 /* When using the index (and thus not using psymtabs), each CU has an
1680 object of this type. This is used to hold information needed by
1681 the various "quick" methods. */
1682 struct dwarf2_per_cu_quick_data
1684 /* The file table. This can be NULL if there was no file table
1685 or it's currently not read in.
1686 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1687 struct quick_file_names
*file_names
;
1689 /* The corresponding symbol table. This is NULL if symbols for this
1690 CU have not yet been read. */
1691 struct symtab
*symtab
;
1693 /* A temporary mark bit used when iterating over all CUs in
1694 expand_symtabs_matching. */
1695 unsigned int mark
: 1;
1697 /* True if we've tried to read the file table and found there isn't one.
1698 There will be no point in trying to read it again next time. */
1699 unsigned int no_file_data
: 1;
1702 /* Hash function for a quick_file_names. */
1705 hash_file_name_entry (const void *e
)
1707 const struct quick_file_names
*file_data
= e
;
1709 return file_data
->offset
;
1712 /* Equality function for a quick_file_names. */
1715 eq_file_name_entry (const void *a
, const void *b
)
1717 const struct quick_file_names
*ea
= a
;
1718 const struct quick_file_names
*eb
= b
;
1720 return ea
->offset
== eb
->offset
;
1723 /* Delete function for a quick_file_names. */
1726 delete_file_name_entry (void *e
)
1728 struct quick_file_names
*file_data
= e
;
1731 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1733 xfree ((void*) file_data
->file_names
[i
]);
1734 if (file_data
->real_names
)
1735 xfree ((void*) file_data
->real_names
[i
]);
1738 /* The space for the struct itself lives on objfile_obstack,
1739 so we don't free it here. */
1742 /* Create a quick_file_names hash table. */
1745 create_quick_file_names_table (unsigned int nr_initial_entries
)
1747 return htab_create_alloc (nr_initial_entries
,
1748 hash_file_name_entry
, eq_file_name_entry
,
1749 delete_file_name_entry
, xcalloc
, xfree
);
1752 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1756 dw2_do_instantiate_symtab (struct objfile
*objfile
,
1757 struct dwarf2_per_cu_data
*per_cu
)
1759 struct cleanup
*back_to
;
1761 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1763 queue_comp_unit (per_cu
, objfile
);
1765 if (per_cu
->from_debug_types
)
1766 read_signatured_type_at_offset (objfile
, per_cu
->offset
);
1768 load_full_comp_unit (per_cu
, objfile
);
1770 process_queue (objfile
);
1772 /* Age the cache, releasing compilation units that have not
1773 been used recently. */
1774 age_cached_comp_units ();
1776 do_cleanups (back_to
);
1779 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1780 the objfile from which this CU came. Returns the resulting symbol
1783 static struct symtab
*
1784 dw2_instantiate_symtab (struct objfile
*objfile
,
1785 struct dwarf2_per_cu_data
*per_cu
)
1787 if (!per_cu
->v
.quick
->symtab
)
1789 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1790 increment_reading_symtab ();
1791 dw2_do_instantiate_symtab (objfile
, per_cu
);
1792 do_cleanups (back_to
);
1794 return per_cu
->v
.quick
->symtab
;
1797 /* Return the CU given its index. */
1799 static struct dwarf2_per_cu_data
*
1800 dw2_get_cu (int index
)
1802 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1804 index
-= dwarf2_per_objfile
->n_comp_units
;
1805 return dwarf2_per_objfile
->type_comp_units
[index
];
1807 return dwarf2_per_objfile
->all_comp_units
[index
];
1810 /* A helper function that knows how to read a 64-bit value in a way
1811 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1815 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1817 if (sizeof (ULONGEST
) < 8)
1821 /* Ignore the upper 4 bytes if they are all zero. */
1822 for (i
= 0; i
< 4; ++i
)
1823 if (bytes
[i
+ 4] != 0)
1826 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1829 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1833 /* Read the CU list from the mapped index, and use it to create all
1834 the CU objects for this objfile. Return 0 if something went wrong,
1835 1 if everything went ok. */
1838 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1839 offset_type cu_list_elements
)
1843 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1844 dwarf2_per_objfile
->all_comp_units
1845 = obstack_alloc (&objfile
->objfile_obstack
,
1846 dwarf2_per_objfile
->n_comp_units
1847 * sizeof (struct dwarf2_per_cu_data
*));
1849 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1851 struct dwarf2_per_cu_data
*the_cu
;
1852 ULONGEST offset
, length
;
1854 if (!extract_cu_value (cu_list
, &offset
)
1855 || !extract_cu_value (cu_list
+ 8, &length
))
1859 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1860 struct dwarf2_per_cu_data
);
1861 the_cu
->offset
= offset
;
1862 the_cu
->length
= length
;
1863 the_cu
->objfile
= objfile
;
1864 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1865 struct dwarf2_per_cu_quick_data
);
1866 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1872 /* Create the signatured type hash table from the index. */
1875 create_signatured_type_table_from_index (struct objfile
*objfile
,
1876 const gdb_byte
*bytes
,
1877 offset_type elements
)
1880 htab_t sig_types_hash
;
1882 dwarf2_per_objfile
->n_type_comp_units
= elements
/ 3;
1883 dwarf2_per_objfile
->type_comp_units
1884 = obstack_alloc (&objfile
->objfile_obstack
,
1885 dwarf2_per_objfile
->n_type_comp_units
1886 * sizeof (struct dwarf2_per_cu_data
*));
1888 sig_types_hash
= allocate_signatured_type_table (objfile
);
1890 for (i
= 0; i
< elements
; i
+= 3)
1892 struct signatured_type
*type_sig
;
1893 ULONGEST offset
, type_offset
, signature
;
1896 if (!extract_cu_value (bytes
, &offset
)
1897 || !extract_cu_value (bytes
+ 8, &type_offset
))
1899 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1902 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1903 struct signatured_type
);
1904 type_sig
->signature
= signature
;
1905 type_sig
->offset
= offset
;
1906 type_sig
->type_offset
= type_offset
;
1907 type_sig
->per_cu
.from_debug_types
= 1;
1908 type_sig
->per_cu
.offset
= offset
;
1909 type_sig
->per_cu
.objfile
= objfile
;
1910 type_sig
->per_cu
.v
.quick
1911 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1912 struct dwarf2_per_cu_quick_data
);
1914 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1917 dwarf2_per_objfile
->type_comp_units
[i
/ 3] = &type_sig
->per_cu
;
1920 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1925 /* Read the address map data from the mapped index, and use it to
1926 populate the objfile's psymtabs_addrmap. */
1929 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1931 const gdb_byte
*iter
, *end
;
1932 struct obstack temp_obstack
;
1933 struct addrmap
*mutable_map
;
1934 struct cleanup
*cleanup
;
1937 obstack_init (&temp_obstack
);
1938 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1939 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1941 iter
= index
->address_table
;
1942 end
= iter
+ index
->address_table_size
;
1944 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1948 ULONGEST hi
, lo
, cu_index
;
1949 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1951 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1953 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1956 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1957 dw2_get_cu (cu_index
));
1960 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1961 &objfile
->objfile_obstack
);
1962 do_cleanups (cleanup
);
1965 /* The hash function for strings in the mapped index. This is the
1966 same as the hashtab.c hash function, but we keep a separate copy to
1967 maintain control over the implementation. This is necessary
1968 because the hash function is tied to the format of the mapped index
1972 mapped_index_string_hash (const void *p
)
1974 const unsigned char *str
= (const unsigned char *) p
;
1978 while ((c
= *str
++) != 0)
1979 r
= r
* 67 + c
- 113;
1984 /* Find a slot in the mapped index INDEX for the object named NAME.
1985 If NAME is found, set *VEC_OUT to point to the CU vector in the
1986 constant pool and return 1. If NAME cannot be found, return 0. */
1989 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
1990 offset_type
**vec_out
)
1992 offset_type hash
= mapped_index_string_hash (name
);
1993 offset_type slot
, step
;
1995 slot
= hash
& (index
->symbol_table_slots
- 1);
1996 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2000 /* Convert a slot number to an offset into the table. */
2001 offset_type i
= 2 * slot
;
2003 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2006 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2007 if (!strcmp (name
, str
))
2009 *vec_out
= (offset_type
*) (index
->constant_pool
2010 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2014 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2018 /* Read the index file. If everything went ok, initialize the "quick"
2019 elements of all the CUs and return 1. Otherwise, return 0. */
2022 dwarf2_read_index (struct objfile
*objfile
)
2025 struct mapped_index
*map
;
2026 offset_type
*metadata
;
2027 const gdb_byte
*cu_list
;
2028 const gdb_byte
*types_list
= NULL
;
2029 offset_type version
, cu_list_elements
;
2030 offset_type types_list_elements
= 0;
2033 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2036 /* Older elfutils strip versions could keep the section in the main
2037 executable while splitting it for the separate debug info file. */
2038 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2039 & SEC_HAS_CONTENTS
) == 0)
2042 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2044 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2045 /* Version check. */
2046 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2047 /* Versions earlier than 3 emitted every copy of a psymbol. This
2048 causes the index to behave very poorly for certain requests. Version 4
2049 contained incomplete addrmap. So, it seems better to just ignore such
2053 /* Indexes with higher version than the one supported by GDB may be no
2054 longer backward compatible. */
2058 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2059 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2061 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2064 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2065 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2069 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2070 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2071 - MAYBE_SWAP (metadata
[i
]))
2075 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2076 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2077 - MAYBE_SWAP (metadata
[i
]));
2080 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2081 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2082 - MAYBE_SWAP (metadata
[i
]))
2083 / (2 * sizeof (offset_type
)));
2086 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2088 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2091 if (types_list_elements
2092 && !create_signatured_type_table_from_index (objfile
, types_list
,
2093 types_list_elements
))
2096 create_addrmap_from_index (objfile
, map
);
2098 dwarf2_per_objfile
->index_table
= map
;
2099 dwarf2_per_objfile
->using_index
= 1;
2100 dwarf2_per_objfile
->quick_file_names_table
=
2101 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2106 /* A helper for the "quick" functions which sets the global
2107 dwarf2_per_objfile according to OBJFILE. */
2110 dw2_setup (struct objfile
*objfile
)
2112 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2113 gdb_assert (dwarf2_per_objfile
);
2116 /* A helper for the "quick" functions which attempts to read the line
2117 table for THIS_CU. */
2119 static struct quick_file_names
*
2120 dw2_get_file_names (struct objfile
*objfile
,
2121 struct dwarf2_per_cu_data
*this_cu
)
2123 bfd
*abfd
= objfile
->obfd
;
2124 struct line_header
*lh
;
2125 struct attribute
*attr
;
2126 struct cleanup
*cleanups
;
2127 struct die_info
*comp_unit_die
;
2128 struct dwarf2_section_info
* sec
;
2129 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
2130 int has_children
, i
;
2131 struct dwarf2_cu cu
;
2132 unsigned int bytes_read
, buffer_size
;
2133 struct die_reader_specs reader_specs
;
2134 char *name
, *comp_dir
;
2136 struct quick_file_names
*qfn
;
2137 unsigned int line_offset
;
2139 if (this_cu
->v
.quick
->file_names
!= NULL
)
2140 return this_cu
->v
.quick
->file_names
;
2141 /* If we know there is no line data, no point in looking again. */
2142 if (this_cu
->v
.quick
->no_file_data
)
2145 init_one_comp_unit (&cu
, objfile
);
2146 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2148 if (this_cu
->from_debug_types
)
2149 sec
= &dwarf2_per_objfile
->types
;
2151 sec
= &dwarf2_per_objfile
->info
;
2152 dwarf2_read_section (objfile
, sec
);
2153 buffer_size
= sec
->size
;
2154 buffer
= sec
->buffer
;
2155 info_ptr
= buffer
+ this_cu
->offset
;
2156 beg_of_comp_unit
= info_ptr
;
2158 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2159 buffer
, buffer_size
,
2162 /* Complete the cu_header. */
2163 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2164 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2167 cu
.per_cu
= this_cu
;
2169 dwarf2_read_abbrevs (abfd
, &cu
);
2170 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2172 if (this_cu
->from_debug_types
)
2173 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2174 init_cu_die_reader (&reader_specs
, &cu
);
2175 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2181 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2184 struct quick_file_names find_entry
;
2186 line_offset
= DW_UNSND (attr
);
2188 /* We may have already read in this line header (TU line header sharing).
2189 If we have we're done. */
2190 find_entry
.offset
= line_offset
;
2191 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2192 &find_entry
, INSERT
);
2195 do_cleanups (cleanups
);
2196 this_cu
->v
.quick
->file_names
= *slot
;
2200 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2204 do_cleanups (cleanups
);
2205 this_cu
->v
.quick
->no_file_data
= 1;
2209 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2210 qfn
->offset
= line_offset
;
2211 gdb_assert (slot
!= NULL
);
2214 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2216 qfn
->num_file_names
= lh
->num_file_names
;
2217 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2218 lh
->num_file_names
* sizeof (char *));
2219 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2220 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2221 qfn
->real_names
= NULL
;
2223 free_line_header (lh
);
2224 do_cleanups (cleanups
);
2226 this_cu
->v
.quick
->file_names
= qfn
;
2230 /* A helper for the "quick" functions which computes and caches the
2231 real path for a given file name from the line table. */
2234 dw2_get_real_path (struct objfile
*objfile
,
2235 struct quick_file_names
*qfn
, int index
)
2237 if (qfn
->real_names
== NULL
)
2238 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2239 qfn
->num_file_names
, sizeof (char *));
2241 if (qfn
->real_names
[index
] == NULL
)
2242 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2244 return qfn
->real_names
[index
];
2247 static struct symtab
*
2248 dw2_find_last_source_symtab (struct objfile
*objfile
)
2252 dw2_setup (objfile
);
2253 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2254 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2257 /* Traversal function for dw2_forget_cached_source_info. */
2260 dw2_free_cached_file_names (void **slot
, void *info
)
2262 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2264 if (file_data
->real_names
)
2268 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2270 xfree ((void*) file_data
->real_names
[i
]);
2271 file_data
->real_names
[i
] = NULL
;
2279 dw2_forget_cached_source_info (struct objfile
*objfile
)
2281 dw2_setup (objfile
);
2283 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2284 dw2_free_cached_file_names
, NULL
);
2288 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2289 const char *full_path
, const char *real_path
,
2290 struct symtab
**result
)
2293 int check_basename
= lbasename (name
) == name
;
2294 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2296 dw2_setup (objfile
);
2298 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2299 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2302 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2303 struct quick_file_names
*file_data
;
2305 if (per_cu
->v
.quick
->symtab
)
2308 file_data
= dw2_get_file_names (objfile
, per_cu
);
2309 if (file_data
== NULL
)
2312 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2314 const char *this_name
= file_data
->file_names
[j
];
2316 if (FILENAME_CMP (name
, this_name
) == 0)
2318 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2322 if (check_basename
&& ! base_cu
2323 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2326 if (full_path
!= NULL
)
2328 const char *this_real_name
= dw2_get_real_path (objfile
,
2331 if (this_real_name
!= NULL
2332 && FILENAME_CMP (full_path
, this_real_name
) == 0)
2334 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2339 if (real_path
!= NULL
)
2341 const char *this_real_name
= dw2_get_real_path (objfile
,
2344 if (this_real_name
!= NULL
2345 && FILENAME_CMP (real_path
, this_real_name
) == 0)
2347 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2356 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2363 static struct symtab
*
2364 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2365 const char *name
, domain_enum domain
)
2367 /* We do all the work in the pre_expand_symtabs_matching hook
2372 /* A helper function that expands all symtabs that hold an object
2376 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2378 dw2_setup (objfile
);
2380 /* index_table is NULL if OBJF_READNOW. */
2381 if (dwarf2_per_objfile
->index_table
)
2385 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2388 offset_type i
, len
= MAYBE_SWAP (*vec
);
2389 for (i
= 0; i
< len
; ++i
)
2391 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2392 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2394 dw2_instantiate_symtab (objfile
, per_cu
);
2401 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2402 int kind
, const char *name
,
2405 dw2_do_expand_symtabs_matching (objfile
, name
);
2409 dw2_print_stats (struct objfile
*objfile
)
2413 dw2_setup (objfile
);
2415 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2416 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2418 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2420 if (!per_cu
->v
.quick
->symtab
)
2423 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2427 dw2_dump (struct objfile
*objfile
)
2429 /* Nothing worth printing. */
2433 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2434 struct section_offsets
*delta
)
2436 /* There's nothing to relocate here. */
2440 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2441 const char *func_name
)
2443 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2447 dw2_expand_all_symtabs (struct objfile
*objfile
)
2451 dw2_setup (objfile
);
2453 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2454 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2456 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2458 dw2_instantiate_symtab (objfile
, per_cu
);
2463 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2464 const char *filename
)
2468 dw2_setup (objfile
);
2470 /* We don't need to consider type units here.
2471 This is only called for examining code, e.g. expand_line_sal.
2472 There can be an order of magnitude (or more) more type units
2473 than comp units, and we avoid them if we can. */
2475 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2478 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2479 struct quick_file_names
*file_data
;
2481 if (per_cu
->v
.quick
->symtab
)
2484 file_data
= dw2_get_file_names (objfile
, per_cu
);
2485 if (file_data
== NULL
)
2488 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2490 const char *this_name
= file_data
->file_names
[j
];
2491 if (FILENAME_CMP (this_name
, filename
) == 0)
2493 dw2_instantiate_symtab (objfile
, per_cu
);
2501 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2503 struct dwarf2_per_cu_data
*per_cu
;
2505 struct quick_file_names
*file_data
;
2507 dw2_setup (objfile
);
2509 /* index_table is NULL if OBJF_READNOW. */
2510 if (!dwarf2_per_objfile
->index_table
)
2513 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2517 /* Note that this just looks at the very first one named NAME -- but
2518 actually we are looking for a function. find_main_filename
2519 should be rewritten so that it doesn't require a custom hook. It
2520 could just use the ordinary symbol tables. */
2521 /* vec[0] is the length, which must always be >0. */
2522 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2524 file_data
= dw2_get_file_names (objfile
, per_cu
);
2525 if (file_data
== NULL
)
2528 return file_data
->file_names
[file_data
->num_file_names
- 1];
2532 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2533 struct objfile
*objfile
, int global
,
2534 int (*callback
) (struct block
*,
2535 struct symbol
*, void *),
2536 void *data
, symbol_compare_ftype
*match
,
2537 symbol_compare_ftype
*ordered_compare
)
2539 /* Currently unimplemented; used for Ada. The function can be called if the
2540 current language is Ada for a non-Ada objfile using GNU index. As Ada
2541 does not look for non-Ada symbols this function should just return. */
2545 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2546 int (*file_matcher
) (const char *, void *),
2547 int (*name_matcher
) (const char *, void *),
2553 struct mapped_index
*index
;
2555 dw2_setup (objfile
);
2557 /* index_table is NULL if OBJF_READNOW. */
2558 if (!dwarf2_per_objfile
->index_table
)
2560 index
= dwarf2_per_objfile
->index_table
;
2562 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2563 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2566 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2567 struct quick_file_names
*file_data
;
2569 per_cu
->v
.quick
->mark
= 0;
2570 if (per_cu
->v
.quick
->symtab
)
2573 file_data
= dw2_get_file_names (objfile
, per_cu
);
2574 if (file_data
== NULL
)
2577 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2579 if (file_matcher (file_data
->file_names
[j
], data
))
2581 per_cu
->v
.quick
->mark
= 1;
2587 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2589 offset_type idx
= 2 * iter
;
2591 offset_type
*vec
, vec_len
, vec_idx
;
2593 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2596 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
2598 if (! (*name_matcher
) (name
, data
))
2601 /* The name was matched, now expand corresponding CUs that were
2603 vec
= (offset_type
*) (index
->constant_pool
2604 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
2605 vec_len
= MAYBE_SWAP (vec
[0]);
2606 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2608 struct dwarf2_per_cu_data
*per_cu
;
2610 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2611 if (per_cu
->v
.quick
->mark
)
2612 dw2_instantiate_symtab (objfile
, per_cu
);
2617 static struct symtab
*
2618 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2619 struct minimal_symbol
*msymbol
,
2621 struct obj_section
*section
,
2624 struct dwarf2_per_cu_data
*data
;
2626 dw2_setup (objfile
);
2628 if (!objfile
->psymtabs_addrmap
)
2631 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2635 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2636 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2637 paddress (get_objfile_arch (objfile
), pc
));
2639 return dw2_instantiate_symtab (objfile
, data
);
2643 dw2_map_symbol_names (struct objfile
*objfile
,
2644 void (*fun
) (const char *, void *),
2648 struct mapped_index
*index
;
2650 dw2_setup (objfile
);
2652 /* index_table is NULL if OBJF_READNOW. */
2653 if (!dwarf2_per_objfile
->index_table
)
2655 index
= dwarf2_per_objfile
->index_table
;
2657 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2659 offset_type idx
= 2 * iter
;
2661 offset_type
*vec
, vec_len
, vec_idx
;
2663 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2666 name
= (index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]));
2668 (*fun
) (name
, data
);
2673 dw2_map_symbol_filenames (struct objfile
*objfile
,
2674 void (*fun
) (const char *, const char *, void *),
2679 dw2_setup (objfile
);
2681 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2682 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2685 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2686 struct quick_file_names
*file_data
;
2688 if (per_cu
->v
.quick
->symtab
)
2691 file_data
= dw2_get_file_names (objfile
, per_cu
);
2692 if (file_data
== NULL
)
2695 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2697 const char *this_real_name
= dw2_get_real_path (objfile
, file_data
,
2699 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
2705 dw2_has_symbols (struct objfile
*objfile
)
2710 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2713 dw2_find_last_source_symtab
,
2714 dw2_forget_cached_source_info
,
2717 dw2_pre_expand_symtabs_matching
,
2721 dw2_expand_symtabs_for_function
,
2722 dw2_expand_all_symtabs
,
2723 dw2_expand_symtabs_with_filename
,
2724 dw2_find_symbol_file
,
2725 dw2_map_matching_symbols
,
2726 dw2_expand_symtabs_matching
,
2727 dw2_find_pc_sect_symtab
,
2728 dw2_map_symbol_names
,
2729 dw2_map_symbol_filenames
2732 /* Initialize for reading DWARF for this objfile. Return 0 if this
2733 file will use psymtabs, or 1 if using the GNU index. */
2736 dwarf2_initialize_objfile (struct objfile
*objfile
)
2738 /* If we're about to read full symbols, don't bother with the
2739 indices. In this case we also don't care if some other debug
2740 format is making psymtabs, because they are all about to be
2742 if ((objfile
->flags
& OBJF_READNOW
))
2746 dwarf2_per_objfile
->using_index
= 1;
2747 create_all_comp_units (objfile
);
2748 create_debug_types_hash_table (objfile
);
2749 dwarf2_per_objfile
->quick_file_names_table
=
2750 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2752 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2753 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2755 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2757 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2758 struct dwarf2_per_cu_quick_data
);
2761 /* Return 1 so that gdb sees the "quick" functions. However,
2762 these functions will be no-ops because we will have expanded
2767 if (dwarf2_read_index (objfile
))
2770 dwarf2_build_psymtabs (objfile
);
2776 /* Build a partial symbol table. */
2779 dwarf2_build_psymtabs (struct objfile
*objfile
)
2781 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2783 init_psymbol_list (objfile
, 1024);
2786 dwarf2_build_psymtabs_hard (objfile
);
2789 /* Return TRUE if OFFSET is within CU_HEADER. */
2792 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2794 unsigned int bottom
= cu_header
->offset
;
2795 unsigned int top
= (cu_header
->offset
2797 + cu_header
->initial_length_size
);
2799 return (offset
>= bottom
&& offset
< top
);
2802 /* Read in the comp unit header information from the debug_info at info_ptr.
2803 NOTE: This leaves members offset, first_die_offset to be filled in
2807 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2808 gdb_byte
*info_ptr
, bfd
*abfd
)
2811 unsigned int bytes_read
;
2813 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2814 cu_header
->initial_length_size
= bytes_read
;
2815 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2816 info_ptr
+= bytes_read
;
2817 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2819 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2821 info_ptr
+= bytes_read
;
2822 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2824 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2825 if (signed_addr
< 0)
2826 internal_error (__FILE__
, __LINE__
,
2827 _("read_comp_unit_head: dwarf from non elf file"));
2828 cu_header
->signed_addr_p
= signed_addr
;
2834 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2835 gdb_byte
*buffer
, unsigned int buffer_size
,
2838 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2840 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2842 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2843 error (_("Dwarf Error: wrong version in compilation unit header "
2844 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2845 bfd_get_filename (abfd
));
2847 if (header
->abbrev_offset
2848 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
2849 &dwarf2_per_objfile
->abbrev
))
2850 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2851 "(offset 0x%lx + 6) [in module %s]"),
2852 (long) header
->abbrev_offset
,
2853 (long) (beg_of_comp_unit
- buffer
),
2854 bfd_get_filename (abfd
));
2856 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2857 > buffer
+ buffer_size
)
2858 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2859 "(offset 0x%lx + 0) [in module %s]"),
2860 (long) header
->length
,
2861 (long) (beg_of_comp_unit
- buffer
),
2862 bfd_get_filename (abfd
));
2867 /* Read in the types comp unit header information from .debug_types entry at
2868 types_ptr. The result is a pointer to one past the end of the header. */
2871 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2872 ULONGEST
*signature
,
2873 gdb_byte
*types_ptr
, bfd
*abfd
)
2875 gdb_byte
*initial_types_ptr
= types_ptr
;
2877 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2878 &dwarf2_per_objfile
->types
);
2879 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2881 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2883 *signature
= read_8_bytes (abfd
, types_ptr
);
2885 types_ptr
+= cu_header
->offset_size
;
2886 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2891 /* Allocate a new partial symtab for file named NAME and mark this new
2892 partial symtab as being an include of PST. */
2895 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2896 struct objfile
*objfile
)
2898 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2900 subpst
->section_offsets
= pst
->section_offsets
;
2901 subpst
->textlow
= 0;
2902 subpst
->texthigh
= 0;
2904 subpst
->dependencies
= (struct partial_symtab
**)
2905 obstack_alloc (&objfile
->objfile_obstack
,
2906 sizeof (struct partial_symtab
*));
2907 subpst
->dependencies
[0] = pst
;
2908 subpst
->number_of_dependencies
= 1;
2910 subpst
->globals_offset
= 0;
2911 subpst
->n_global_syms
= 0;
2912 subpst
->statics_offset
= 0;
2913 subpst
->n_static_syms
= 0;
2914 subpst
->symtab
= NULL
;
2915 subpst
->read_symtab
= pst
->read_symtab
;
2918 /* No private part is necessary for include psymtabs. This property
2919 can be used to differentiate between such include psymtabs and
2920 the regular ones. */
2921 subpst
->read_symtab_private
= NULL
;
2924 /* Read the Line Number Program data and extract the list of files
2925 included by the source file represented by PST. Build an include
2926 partial symtab for each of these included files. */
2929 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2930 struct die_info
*die
,
2931 struct partial_symtab
*pst
)
2933 struct objfile
*objfile
= cu
->objfile
;
2934 bfd
*abfd
= objfile
->obfd
;
2935 struct line_header
*lh
= NULL
;
2936 struct attribute
*attr
;
2938 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2941 unsigned int line_offset
= DW_UNSND (attr
);
2943 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2946 return; /* No linetable, so no includes. */
2948 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2949 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2951 free_line_header (lh
);
2955 hash_type_signature (const void *item
)
2957 const struct signatured_type
*type_sig
= item
;
2959 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2960 return type_sig
->signature
;
2964 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2966 const struct signatured_type
*lhs
= item_lhs
;
2967 const struct signatured_type
*rhs
= item_rhs
;
2969 return lhs
->signature
== rhs
->signature
;
2972 /* Allocate a hash table for signatured types. */
2975 allocate_signatured_type_table (struct objfile
*objfile
)
2977 return htab_create_alloc_ex (41,
2978 hash_type_signature
,
2981 &objfile
->objfile_obstack
,
2982 hashtab_obstack_allocate
,
2983 dummy_obstack_deallocate
);
2986 /* A helper function to add a signatured type CU to a list. */
2989 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2991 struct signatured_type
*sigt
= *slot
;
2992 struct dwarf2_per_cu_data
***datap
= datum
;
2994 **datap
= &sigt
->per_cu
;
3000 /* Create the hash table of all entries in the .debug_types section.
3001 The result is zero if there is an error (e.g. missing .debug_types section),
3002 otherwise non-zero. */
3005 create_debug_types_hash_table (struct objfile
*objfile
)
3009 struct dwarf2_per_cu_data
**iter
;
3011 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
3012 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
3014 if (info_ptr
== NULL
)
3016 dwarf2_per_objfile
->signatured_types
= NULL
;
3020 types_htab
= allocate_signatured_type_table (objfile
);
3022 if (dwarf2_die_debug
)
3023 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
3025 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
3026 + dwarf2_per_objfile
->types
.size
)
3028 unsigned int offset
;
3029 unsigned int offset_size
;
3030 unsigned int type_offset
;
3031 unsigned int length
, initial_length_size
;
3032 unsigned short version
;
3034 struct signatured_type
*type_sig
;
3036 gdb_byte
*ptr
= info_ptr
;
3038 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
3040 /* We need to read the type's signature in order to build the hash
3041 table, but we don't need to read anything else just yet. */
3043 /* Sanity check to ensure entire cu is present. */
3044 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
3045 if (ptr
+ length
+ initial_length_size
3046 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
3048 complaint (&symfile_complaints
,
3049 _("debug type entry runs off end "
3050 "of `.debug_types' section, ignored"));
3054 offset_size
= initial_length_size
== 4 ? 4 : 8;
3055 ptr
+= initial_length_size
;
3056 version
= bfd_get_16 (objfile
->obfd
, ptr
);
3058 ptr
+= offset_size
; /* abbrev offset */
3059 ptr
+= 1; /* address size */
3060 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
3062 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
3064 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
3065 memset (type_sig
, 0, sizeof (*type_sig
));
3066 type_sig
->signature
= signature
;
3067 type_sig
->offset
= offset
;
3068 type_sig
->type_offset
= type_offset
;
3069 type_sig
->per_cu
.objfile
= objfile
;
3070 type_sig
->per_cu
.from_debug_types
= 1;
3072 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
3073 gdb_assert (slot
!= NULL
);
3076 if (dwarf2_die_debug
)
3077 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3078 offset
, phex (signature
, sizeof (signature
)));
3080 info_ptr
= info_ptr
+ initial_length_size
+ length
;
3083 dwarf2_per_objfile
->signatured_types
= types_htab
;
3085 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
3086 dwarf2_per_objfile
->type_comp_units
3087 = obstack_alloc (&objfile
->objfile_obstack
,
3088 dwarf2_per_objfile
->n_type_comp_units
3089 * sizeof (struct dwarf2_per_cu_data
*));
3090 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
3091 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
3092 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
3093 == dwarf2_per_objfile
->n_type_comp_units
);
3098 /* Lookup a signature based type.
3099 Returns NULL if SIG is not present in the table. */
3101 static struct signatured_type
*
3102 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
3104 struct signatured_type find_entry
, *entry
;
3106 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3108 complaint (&symfile_complaints
,
3109 _("missing `.debug_types' section for DW_FORM_sig8 die"));
3113 find_entry
.signature
= sig
;
3114 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3118 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3121 init_cu_die_reader (struct die_reader_specs
*reader
,
3122 struct dwarf2_cu
*cu
)
3124 reader
->abfd
= cu
->objfile
->obfd
;
3126 if (cu
->per_cu
->from_debug_types
)
3128 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3129 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
3133 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3134 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
3138 /* Find the base address of the compilation unit for range lists and
3139 location lists. It will normally be specified by DW_AT_low_pc.
3140 In DWARF-3 draft 4, the base address could be overridden by
3141 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3142 compilation units with discontinuous ranges. */
3145 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3147 struct attribute
*attr
;
3150 cu
->base_address
= 0;
3152 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3155 cu
->base_address
= DW_ADDR (attr
);
3160 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3163 cu
->base_address
= DW_ADDR (attr
);
3169 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3170 to combine the common parts.
3171 Process a compilation unit for a psymtab.
3172 BUFFER is a pointer to the beginning of the dwarf section buffer,
3173 either .debug_info or debug_types.
3174 INFO_PTR is a pointer to the start of the CU.
3175 Returns a pointer to the next CU. */
3178 process_psymtab_comp_unit (struct objfile
*objfile
,
3179 struct dwarf2_per_cu_data
*this_cu
,
3180 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3181 unsigned int buffer_size
)
3183 bfd
*abfd
= objfile
->obfd
;
3184 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3185 struct die_info
*comp_unit_die
;
3186 struct partial_symtab
*pst
;
3188 struct cleanup
*back_to_inner
;
3189 struct dwarf2_cu cu
;
3190 int has_children
, has_pc_info
;
3191 struct attribute
*attr
;
3192 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3193 struct die_reader_specs reader_specs
;
3195 init_one_comp_unit (&cu
, objfile
);
3196 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3198 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3199 buffer
, buffer_size
,
3202 /* Complete the cu_header. */
3203 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3204 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3206 cu
.list_in_scope
= &file_symbols
;
3208 /* If this compilation unit was already read in, free the
3209 cached copy in order to read it in again. This is
3210 necessary because we skipped some symbols when we first
3211 read in the compilation unit (see load_partial_dies).
3212 This problem could be avoided, but the benefit is
3214 if (this_cu
->cu
!= NULL
)
3215 free_one_cached_comp_unit (this_cu
->cu
);
3217 /* Note that this is a pointer to our stack frame, being
3218 added to a global data structure. It will be cleaned up
3219 in free_stack_comp_unit when we finish with this
3220 compilation unit. */
3222 cu
.per_cu
= this_cu
;
3224 /* Read the abbrevs for this compilation unit into a table. */
3225 dwarf2_read_abbrevs (abfd
, &cu
);
3226 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3228 /* Read the compilation unit die. */
3229 if (this_cu
->from_debug_types
)
3230 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3231 init_cu_die_reader (&reader_specs
, &cu
);
3232 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3235 if (this_cu
->from_debug_types
)
3237 /* offset,length haven't been set yet for type units. */
3238 this_cu
->offset
= cu
.header
.offset
;
3239 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3241 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3243 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3244 + cu
.header
.initial_length_size
);
3245 do_cleanups (back_to_inner
);
3249 prepare_one_comp_unit (&cu
, comp_unit_die
);
3251 /* Allocate a new partial symbol table structure. */
3252 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3253 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3254 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3255 /* TEXTLOW and TEXTHIGH are set below. */
3257 objfile
->global_psymbols
.next
,
3258 objfile
->static_psymbols
.next
);
3260 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3262 pst
->dirname
= DW_STRING (attr
);
3264 pst
->read_symtab_private
= this_cu
;
3266 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3268 /* Store the function that reads in the rest of the symbol table. */
3269 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3271 this_cu
->v
.psymtab
= pst
;
3273 dwarf2_find_base_address (comp_unit_die
, &cu
);
3275 /* Possibly set the default values of LOWPC and HIGHPC from
3277 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3278 &best_highpc
, &cu
, pst
);
3279 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3280 /* Store the contiguous range if it is not empty; it can be empty for
3281 CUs with no code. */
3282 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3283 best_lowpc
+ baseaddr
,
3284 best_highpc
+ baseaddr
- 1, pst
);
3286 /* Check if comp unit has_children.
3287 If so, read the rest of the partial symbols from this comp unit.
3288 If not, there's no more debug_info for this comp unit. */
3291 struct partial_die_info
*first_die
;
3292 CORE_ADDR lowpc
, highpc
;
3294 lowpc
= ((CORE_ADDR
) -1);
3295 highpc
= ((CORE_ADDR
) 0);
3297 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3299 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3300 ! has_pc_info
, &cu
);
3302 /* If we didn't find a lowpc, set it to highpc to avoid
3303 complaints from `maint check'. */
3304 if (lowpc
== ((CORE_ADDR
) -1))
3307 /* If the compilation unit didn't have an explicit address range,
3308 then use the information extracted from its child dies. */
3312 best_highpc
= highpc
;
3315 pst
->textlow
= best_lowpc
+ baseaddr
;
3316 pst
->texthigh
= best_highpc
+ baseaddr
;
3318 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3319 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3320 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3321 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3322 sort_pst_symbols (pst
);
3324 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3325 + cu
.header
.initial_length_size
);
3327 if (this_cu
->from_debug_types
)
3329 /* It's not clear we want to do anything with stmt lists here.
3330 Waiting to see what gcc ultimately does. */
3334 /* Get the list of files included in the current compilation unit,
3335 and build a psymtab for each of them. */
3336 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3339 do_cleanups (back_to_inner
);
3344 /* Traversal function for htab_traverse_noresize.
3345 Process one .debug_types comp-unit. */
3348 process_type_comp_unit (void **slot
, void *info
)
3350 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3351 struct objfile
*objfile
= (struct objfile
*) info
;
3352 struct dwarf2_per_cu_data
*this_cu
;
3354 this_cu
= &entry
->per_cu
;
3356 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3357 process_psymtab_comp_unit (objfile
, this_cu
,
3358 dwarf2_per_objfile
->types
.buffer
,
3359 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3360 dwarf2_per_objfile
->types
.size
);
3365 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3366 Build partial symbol tables for the .debug_types comp-units. */
3369 build_type_psymtabs (struct objfile
*objfile
)
3371 if (! create_debug_types_hash_table (objfile
))
3374 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3375 process_type_comp_unit
, objfile
);
3378 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3381 psymtabs_addrmap_cleanup (void *o
)
3383 struct objfile
*objfile
= o
;
3385 objfile
->psymtabs_addrmap
= NULL
;
3388 /* Build the partial symbol table by doing a quick pass through the
3389 .debug_info and .debug_abbrev sections. */
3392 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3395 struct cleanup
*back_to
, *addrmap_cleanup
;
3396 struct obstack temp_obstack
;
3398 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3400 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3401 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3403 /* Any cached compilation units will be linked by the per-objfile
3404 read_in_chain. Make sure to free them when we're done. */
3405 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3407 build_type_psymtabs (objfile
);
3409 create_all_comp_units (objfile
);
3411 /* Create a temporary address map on a temporary obstack. We later
3412 copy this to the final obstack. */
3413 obstack_init (&temp_obstack
);
3414 make_cleanup_obstack_free (&temp_obstack
);
3415 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3416 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3418 /* Since the objects we're extracting from .debug_info vary in
3419 length, only the individual functions to extract them (like
3420 read_comp_unit_head and load_partial_die) can really know whether
3421 the buffer is large enough to hold another complete object.
3423 At the moment, they don't actually check that. If .debug_info
3424 holds just one extra byte after the last compilation unit's dies,
3425 then read_comp_unit_head will happily read off the end of the
3426 buffer. read_partial_die is similarly casual. Those functions
3429 For this loop condition, simply checking whether there's any data
3430 left at all should be sufficient. */
3432 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3433 + dwarf2_per_objfile
->info
.size
))
3435 struct dwarf2_per_cu_data
*this_cu
;
3437 this_cu
= dwarf2_find_comp_unit (info_ptr
3438 - dwarf2_per_objfile
->info
.buffer
,
3441 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3442 dwarf2_per_objfile
->info
.buffer
,
3444 dwarf2_per_objfile
->info
.size
);
3447 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3448 &objfile
->objfile_obstack
);
3449 discard_cleanups (addrmap_cleanup
);
3451 do_cleanups (back_to
);
3454 /* Load the partial DIEs for a secondary CU into memory. */
3457 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3458 struct objfile
*objfile
)
3460 bfd
*abfd
= objfile
->obfd
;
3461 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3462 struct die_info
*comp_unit_die
;
3463 struct dwarf2_cu
*cu
;
3464 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3466 struct die_reader_specs reader_specs
;
3469 gdb_assert (! this_cu
->from_debug_types
);
3471 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3472 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3473 beg_of_comp_unit
= info_ptr
;
3475 if (this_cu
->cu
== NULL
)
3477 cu
= xmalloc (sizeof (*cu
));
3478 init_one_comp_unit (cu
, objfile
);
3482 /* If an error occurs while loading, release our storage. */
3483 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3485 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3486 dwarf2_per_objfile
->info
.buffer
,
3487 dwarf2_per_objfile
->info
.size
,
3490 /* Complete the cu_header. */
3491 cu
->header
.offset
= this_cu
->offset
;
3492 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3494 /* Link this compilation unit into the compilation unit tree. */
3496 cu
->per_cu
= this_cu
;
3498 /* Link this CU into read_in_chain. */
3499 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3500 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3505 info_ptr
+= cu
->header
.first_die_offset
;
3508 /* Read the abbrevs for this compilation unit into a table. */
3509 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3510 dwarf2_read_abbrevs (abfd
, cu
);
3511 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3513 /* Read the compilation unit die. */
3514 init_cu_die_reader (&reader_specs
, cu
);
3515 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3518 prepare_one_comp_unit (cu
, comp_unit_die
);
3520 /* Check if comp unit has_children.
3521 If so, read the rest of the partial symbols from this comp unit.
3522 If not, there's no more debug_info for this comp unit. */
3524 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3526 do_cleanups (free_abbrevs_cleanup
);
3530 /* We've successfully allocated this compilation unit. Let our
3531 caller clean it up when finished with it. */
3532 discard_cleanups (free_cu_cleanup
);
3536 /* Create a list of all compilation units in OBJFILE. We do this only
3537 if an inter-comp-unit reference is found; presumably if there is one,
3538 there will be many, and one will occur early in the .debug_info section.
3539 So there's no point in building this list incrementally. */
3542 create_all_comp_units (struct objfile
*objfile
)
3546 struct dwarf2_per_cu_data
**all_comp_units
;
3549 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3550 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3554 all_comp_units
= xmalloc (n_allocated
3555 * sizeof (struct dwarf2_per_cu_data
*));
3557 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
3558 + dwarf2_per_objfile
->info
.size
)
3560 unsigned int length
, initial_length_size
;
3561 struct dwarf2_per_cu_data
*this_cu
;
3562 unsigned int offset
;
3564 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3566 /* Read just enough information to find out where the next
3567 compilation unit is. */
3568 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3569 &initial_length_size
);
3571 /* Save the compilation unit for later lookup. */
3572 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3573 sizeof (struct dwarf2_per_cu_data
));
3574 memset (this_cu
, 0, sizeof (*this_cu
));
3575 this_cu
->offset
= offset
;
3576 this_cu
->length
= length
+ initial_length_size
;
3577 this_cu
->objfile
= objfile
;
3579 if (n_comp_units
== n_allocated
)
3582 all_comp_units
= xrealloc (all_comp_units
,
3584 * sizeof (struct dwarf2_per_cu_data
*));
3586 all_comp_units
[n_comp_units
++] = this_cu
;
3588 info_ptr
= info_ptr
+ this_cu
->length
;
3591 dwarf2_per_objfile
->all_comp_units
3592 = obstack_alloc (&objfile
->objfile_obstack
,
3593 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3594 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3595 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3596 xfree (all_comp_units
);
3597 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3600 /* Process all loaded DIEs for compilation unit CU, starting at
3601 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3602 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3603 DW_AT_ranges). If NEED_PC is set, then this function will set
3604 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3605 and record the covered ranges in the addrmap. */
3608 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3609 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3611 struct partial_die_info
*pdi
;
3613 /* Now, march along the PDI's, descending into ones which have
3614 interesting children but skipping the children of the other ones,
3615 until we reach the end of the compilation unit. */
3621 fixup_partial_die (pdi
, cu
);
3623 /* Anonymous namespaces or modules have no name but have interesting
3624 children, so we need to look at them. Ditto for anonymous
3627 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3628 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3632 case DW_TAG_subprogram
:
3633 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3635 case DW_TAG_constant
:
3636 case DW_TAG_variable
:
3637 case DW_TAG_typedef
:
3638 case DW_TAG_union_type
:
3639 if (!pdi
->is_declaration
)
3641 add_partial_symbol (pdi
, cu
);
3644 case DW_TAG_class_type
:
3645 case DW_TAG_interface_type
:
3646 case DW_TAG_structure_type
:
3647 if (!pdi
->is_declaration
)
3649 add_partial_symbol (pdi
, cu
);
3652 case DW_TAG_enumeration_type
:
3653 if (!pdi
->is_declaration
)
3654 add_partial_enumeration (pdi
, cu
);
3656 case DW_TAG_base_type
:
3657 case DW_TAG_subrange_type
:
3658 /* File scope base type definitions are added to the partial
3660 add_partial_symbol (pdi
, cu
);
3662 case DW_TAG_namespace
:
3663 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3666 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3673 /* If the die has a sibling, skip to the sibling. */
3675 pdi
= pdi
->die_sibling
;
3679 /* Functions used to compute the fully scoped name of a partial DIE.
3681 Normally, this is simple. For C++, the parent DIE's fully scoped
3682 name is concatenated with "::" and the partial DIE's name. For
3683 Java, the same thing occurs except that "." is used instead of "::".
3684 Enumerators are an exception; they use the scope of their parent
3685 enumeration type, i.e. the name of the enumeration type is not
3686 prepended to the enumerator.
3688 There are two complexities. One is DW_AT_specification; in this
3689 case "parent" means the parent of the target of the specification,
3690 instead of the direct parent of the DIE. The other is compilers
3691 which do not emit DW_TAG_namespace; in this case we try to guess
3692 the fully qualified name of structure types from their members'
3693 linkage names. This must be done using the DIE's children rather
3694 than the children of any DW_AT_specification target. We only need
3695 to do this for structures at the top level, i.e. if the target of
3696 any DW_AT_specification (if any; otherwise the DIE itself) does not
3699 /* Compute the scope prefix associated with PDI's parent, in
3700 compilation unit CU. The result will be allocated on CU's
3701 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3702 field. NULL is returned if no prefix is necessary. */
3704 partial_die_parent_scope (struct partial_die_info
*pdi
,
3705 struct dwarf2_cu
*cu
)
3707 char *grandparent_scope
;
3708 struct partial_die_info
*parent
, *real_pdi
;
3710 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3711 then this means the parent of the specification DIE. */
3714 while (real_pdi
->has_specification
)
3715 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3717 parent
= real_pdi
->die_parent
;
3721 if (parent
->scope_set
)
3722 return parent
->scope
;
3724 fixup_partial_die (parent
, cu
);
3726 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3728 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3729 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3730 Work around this problem here. */
3731 if (cu
->language
== language_cplus
3732 && parent
->tag
== DW_TAG_namespace
3733 && strcmp (parent
->name
, "::") == 0
3734 && grandparent_scope
== NULL
)
3736 parent
->scope
= NULL
;
3737 parent
->scope_set
= 1;
3741 if (parent
->tag
== DW_TAG_namespace
3742 || parent
->tag
== DW_TAG_module
3743 || parent
->tag
== DW_TAG_structure_type
3744 || parent
->tag
== DW_TAG_class_type
3745 || parent
->tag
== DW_TAG_interface_type
3746 || parent
->tag
== DW_TAG_union_type
3747 || parent
->tag
== DW_TAG_enumeration_type
)
3749 if (grandparent_scope
== NULL
)
3750 parent
->scope
= parent
->name
;
3752 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
3754 parent
->name
, 0, cu
);
3756 else if (parent
->tag
== DW_TAG_enumerator
)
3757 /* Enumerators should not get the name of the enumeration as a prefix. */
3758 parent
->scope
= grandparent_scope
;
3761 /* FIXME drow/2004-04-01: What should we be doing with
3762 function-local names? For partial symbols, we should probably be
3764 complaint (&symfile_complaints
,
3765 _("unhandled containing DIE tag %d for DIE at %d"),
3766 parent
->tag
, pdi
->offset
);
3767 parent
->scope
= grandparent_scope
;
3770 parent
->scope_set
= 1;
3771 return parent
->scope
;
3774 /* Return the fully scoped name associated with PDI, from compilation unit
3775 CU. The result will be allocated with malloc. */
3777 partial_die_full_name (struct partial_die_info
*pdi
,
3778 struct dwarf2_cu
*cu
)
3782 /* If this is a template instantiation, we can not work out the
3783 template arguments from partial DIEs. So, unfortunately, we have
3784 to go through the full DIEs. At least any work we do building
3785 types here will be reused if full symbols are loaded later. */
3786 if (pdi
->has_template_arguments
)
3788 fixup_partial_die (pdi
, cu
);
3790 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3792 struct die_info
*die
;
3793 struct attribute attr
;
3794 struct dwarf2_cu
*ref_cu
= cu
;
3797 attr
.form
= DW_FORM_ref_addr
;
3798 attr
.u
.addr
= pdi
->offset
;
3799 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3801 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3805 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3806 if (parent_scope
== NULL
)
3809 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3813 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3815 struct objfile
*objfile
= cu
->objfile
;
3817 char *actual_name
= NULL
;
3818 const struct partial_symbol
*psym
= NULL
;
3820 int built_actual_name
= 0;
3822 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3824 actual_name
= partial_die_full_name (pdi
, cu
);
3826 built_actual_name
= 1;
3828 if (actual_name
== NULL
)
3829 actual_name
= pdi
->name
;
3833 case DW_TAG_subprogram
:
3834 if (pdi
->is_external
|| cu
->language
== language_ada
)
3836 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3837 of the global scope. But in Ada, we want to be able to access
3838 nested procedures globally. So all Ada subprograms are stored
3839 in the global scope. */
3840 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3841 mst_text, objfile); */
3842 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3844 VAR_DOMAIN
, LOC_BLOCK
,
3845 &objfile
->global_psymbols
,
3846 0, pdi
->lowpc
+ baseaddr
,
3847 cu
->language
, objfile
);
3851 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3852 mst_file_text, objfile); */
3853 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3855 VAR_DOMAIN
, LOC_BLOCK
,
3856 &objfile
->static_psymbols
,
3857 0, pdi
->lowpc
+ baseaddr
,
3858 cu
->language
, objfile
);
3861 case DW_TAG_constant
:
3863 struct psymbol_allocation_list
*list
;
3865 if (pdi
->is_external
)
3866 list
= &objfile
->global_psymbols
;
3868 list
= &objfile
->static_psymbols
;
3869 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3870 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
3871 list
, 0, 0, cu
->language
, objfile
);
3875 case DW_TAG_variable
:
3877 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3881 && !dwarf2_per_objfile
->has_section_at_zero
)
3883 /* A global or static variable may also have been stripped
3884 out by the linker if unused, in which case its address
3885 will be nullified; do not add such variables into partial
3886 symbol table then. */
3888 else if (pdi
->is_external
)
3891 Don't enter into the minimal symbol tables as there is
3892 a minimal symbol table entry from the ELF symbols already.
3893 Enter into partial symbol table if it has a location
3894 descriptor or a type.
3895 If the location descriptor is missing, new_symbol will create
3896 a LOC_UNRESOLVED symbol, the address of the variable will then
3897 be determined from the minimal symbol table whenever the variable
3899 The address for the partial symbol table entry is not
3900 used by GDB, but it comes in handy for debugging partial symbol
3903 if (pdi
->locdesc
|| pdi
->has_type
)
3904 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3906 VAR_DOMAIN
, LOC_STATIC
,
3907 &objfile
->global_psymbols
,
3909 cu
->language
, objfile
);
3913 /* Static Variable. Skip symbols without location descriptors. */
3914 if (pdi
->locdesc
== NULL
)
3916 if (built_actual_name
)
3917 xfree (actual_name
);
3920 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3921 mst_file_data, objfile); */
3922 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3924 VAR_DOMAIN
, LOC_STATIC
,
3925 &objfile
->static_psymbols
,
3927 cu
->language
, objfile
);
3930 case DW_TAG_typedef
:
3931 case DW_TAG_base_type
:
3932 case DW_TAG_subrange_type
:
3933 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3935 VAR_DOMAIN
, LOC_TYPEDEF
,
3936 &objfile
->static_psymbols
,
3937 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3939 case DW_TAG_namespace
:
3940 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3942 VAR_DOMAIN
, LOC_TYPEDEF
,
3943 &objfile
->global_psymbols
,
3944 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3946 case DW_TAG_class_type
:
3947 case DW_TAG_interface_type
:
3948 case DW_TAG_structure_type
:
3949 case DW_TAG_union_type
:
3950 case DW_TAG_enumeration_type
:
3951 /* Skip external references. The DWARF standard says in the section
3952 about "Structure, Union, and Class Type Entries": "An incomplete
3953 structure, union or class type is represented by a structure,
3954 union or class entry that does not have a byte size attribute
3955 and that has a DW_AT_declaration attribute." */
3956 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3958 if (built_actual_name
)
3959 xfree (actual_name
);
3963 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3964 static vs. global. */
3965 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3967 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3968 (cu
->language
== language_cplus
3969 || cu
->language
== language_java
)
3970 ? &objfile
->global_psymbols
3971 : &objfile
->static_psymbols
,
3972 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3975 case DW_TAG_enumerator
:
3976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3978 VAR_DOMAIN
, LOC_CONST
,
3979 (cu
->language
== language_cplus
3980 || cu
->language
== language_java
)
3981 ? &objfile
->global_psymbols
3982 : &objfile
->static_psymbols
,
3983 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3989 if (built_actual_name
)
3990 xfree (actual_name
);
3993 /* Read a partial die corresponding to a namespace; also, add a symbol
3994 corresponding to that namespace to the symbol table. NAMESPACE is
3995 the name of the enclosing namespace. */
3998 add_partial_namespace (struct partial_die_info
*pdi
,
3999 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4000 int need_pc
, struct dwarf2_cu
*cu
)
4002 /* Add a symbol for the namespace. */
4004 add_partial_symbol (pdi
, cu
);
4006 /* Now scan partial symbols in that namespace. */
4008 if (pdi
->has_children
)
4009 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4012 /* Read a partial die corresponding to a Fortran module. */
4015 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
4016 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4018 /* Now scan partial symbols in that module. */
4020 if (pdi
->has_children
)
4021 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4024 /* Read a partial die corresponding to a subprogram and create a partial
4025 symbol for that subprogram. When the CU language allows it, this
4026 routine also defines a partial symbol for each nested subprogram
4027 that this subprogram contains.
4029 DIE my also be a lexical block, in which case we simply search
4030 recursively for suprograms defined inside that lexical block.
4031 Again, this is only performed when the CU language allows this
4032 type of definitions. */
4035 add_partial_subprogram (struct partial_die_info
*pdi
,
4036 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4037 int need_pc
, struct dwarf2_cu
*cu
)
4039 if (pdi
->tag
== DW_TAG_subprogram
)
4041 if (pdi
->has_pc_info
)
4043 if (pdi
->lowpc
< *lowpc
)
4044 *lowpc
= pdi
->lowpc
;
4045 if (pdi
->highpc
> *highpc
)
4046 *highpc
= pdi
->highpc
;
4050 struct objfile
*objfile
= cu
->objfile
;
4052 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4053 SECT_OFF_TEXT (objfile
));
4054 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4055 pdi
->lowpc
+ baseaddr
,
4056 pdi
->highpc
- 1 + baseaddr
,
4057 cu
->per_cu
->v
.psymtab
);
4059 if (!pdi
->is_declaration
)
4060 /* Ignore subprogram DIEs that do not have a name, they are
4061 illegal. Do not emit a complaint at this point, we will
4062 do so when we convert this psymtab into a symtab. */
4064 add_partial_symbol (pdi
, cu
);
4068 if (! pdi
->has_children
)
4071 if (cu
->language
== language_ada
)
4073 pdi
= pdi
->die_child
;
4076 fixup_partial_die (pdi
, cu
);
4077 if (pdi
->tag
== DW_TAG_subprogram
4078 || pdi
->tag
== DW_TAG_lexical_block
)
4079 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4080 pdi
= pdi
->die_sibling
;
4085 /* Read a partial die corresponding to an enumeration type. */
4088 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4089 struct dwarf2_cu
*cu
)
4091 struct partial_die_info
*pdi
;
4093 if (enum_pdi
->name
!= NULL
)
4094 add_partial_symbol (enum_pdi
, cu
);
4096 pdi
= enum_pdi
->die_child
;
4099 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4100 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
4102 add_partial_symbol (pdi
, cu
);
4103 pdi
= pdi
->die_sibling
;
4107 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4108 Return the corresponding abbrev, or NULL if the number is zero (indicating
4109 an empty DIE). In either case *BYTES_READ will be set to the length of
4110 the initial number. */
4112 static struct abbrev_info
*
4113 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
4114 struct dwarf2_cu
*cu
)
4116 bfd
*abfd
= cu
->objfile
->obfd
;
4117 unsigned int abbrev_number
;
4118 struct abbrev_info
*abbrev
;
4120 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4122 if (abbrev_number
== 0)
4125 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4128 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4129 abbrev_number
, bfd_get_filename (abfd
));
4135 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4136 Returns a pointer to the end of a series of DIEs, terminated by an empty
4137 DIE. Any children of the skipped DIEs will also be skipped. */
4140 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4142 struct abbrev_info
*abbrev
;
4143 unsigned int bytes_read
;
4147 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4149 return info_ptr
+ bytes_read
;
4151 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4155 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4156 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4157 abbrev corresponding to that skipped uleb128 should be passed in
4158 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4162 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4163 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4165 unsigned int bytes_read
;
4166 struct attribute attr
;
4167 bfd
*abfd
= cu
->objfile
->obfd
;
4168 unsigned int form
, i
;
4170 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4172 /* The only abbrev we care about is DW_AT_sibling. */
4173 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4175 read_attribute (&attr
, &abbrev
->attrs
[i
],
4176 abfd
, info_ptr
, cu
);
4177 if (attr
.form
== DW_FORM_ref_addr
)
4178 complaint (&symfile_complaints
,
4179 _("ignoring absolute DW_AT_sibling"));
4181 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4184 /* If it isn't DW_AT_sibling, skip this attribute. */
4185 form
= abbrev
->attrs
[i
].form
;
4189 case DW_FORM_ref_addr
:
4190 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4191 and later it is offset sized. */
4192 if (cu
->header
.version
== 2)
4193 info_ptr
+= cu
->header
.addr_size
;
4195 info_ptr
+= cu
->header
.offset_size
;
4198 info_ptr
+= cu
->header
.addr_size
;
4205 case DW_FORM_flag_present
:
4220 case DW_FORM_string
:
4221 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4222 info_ptr
+= bytes_read
;
4224 case DW_FORM_sec_offset
:
4226 info_ptr
+= cu
->header
.offset_size
;
4228 case DW_FORM_exprloc
:
4230 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4231 info_ptr
+= bytes_read
;
4233 case DW_FORM_block1
:
4234 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4236 case DW_FORM_block2
:
4237 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4239 case DW_FORM_block4
:
4240 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4244 case DW_FORM_ref_udata
:
4245 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4247 case DW_FORM_indirect
:
4248 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4249 info_ptr
+= bytes_read
;
4250 /* We need to continue parsing from here, so just go back to
4252 goto skip_attribute
;
4255 error (_("Dwarf Error: Cannot handle %s "
4256 "in DWARF reader [in module %s]"),
4257 dwarf_form_name (form
),
4258 bfd_get_filename (abfd
));
4262 if (abbrev
->has_children
)
4263 return skip_children (buffer
, info_ptr
, cu
);
4268 /* Locate ORIG_PDI's sibling.
4269 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4273 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4274 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4275 bfd
*abfd
, struct dwarf2_cu
*cu
)
4277 /* Do we know the sibling already? */
4279 if (orig_pdi
->sibling
)
4280 return orig_pdi
->sibling
;
4282 /* Are there any children to deal with? */
4284 if (!orig_pdi
->has_children
)
4287 /* Skip the children the long way. */
4289 return skip_children (buffer
, info_ptr
, cu
);
4292 /* Expand this partial symbol table into a full symbol table. */
4295 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4301 warning (_("bug: psymtab for %s is already read in."),
4308 printf_filtered (_("Reading in symbols for %s..."),
4310 gdb_flush (gdb_stdout
);
4313 /* Restore our global data. */
4314 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4315 dwarf2_objfile_data_key
);
4317 /* If this psymtab is constructed from a debug-only objfile, the
4318 has_section_at_zero flag will not necessarily be correct. We
4319 can get the correct value for this flag by looking at the data
4320 associated with the (presumably stripped) associated objfile. */
4321 if (pst
->objfile
->separate_debug_objfile_backlink
)
4323 struct dwarf2_per_objfile
*dpo_backlink
4324 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4325 dwarf2_objfile_data_key
);
4327 dwarf2_per_objfile
->has_section_at_zero
4328 = dpo_backlink
->has_section_at_zero
;
4331 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4333 psymtab_to_symtab_1 (pst
);
4335 /* Finish up the debug error message. */
4337 printf_filtered (_("done.\n"));
4342 /* Add PER_CU to the queue. */
4345 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4347 struct dwarf2_queue_item
*item
;
4350 item
= xmalloc (sizeof (*item
));
4351 item
->per_cu
= per_cu
;
4354 if (dwarf2_queue
== NULL
)
4355 dwarf2_queue
= item
;
4357 dwarf2_queue_tail
->next
= item
;
4359 dwarf2_queue_tail
= item
;
4362 /* Process the queue. */
4365 process_queue (struct objfile
*objfile
)
4367 struct dwarf2_queue_item
*item
, *next_item
;
4369 /* The queue starts out with one item, but following a DIE reference
4370 may load a new CU, adding it to the end of the queue. */
4371 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4373 if (dwarf2_per_objfile
->using_index
4374 ? !item
->per_cu
->v
.quick
->symtab
4375 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4376 process_full_comp_unit (item
->per_cu
);
4378 item
->per_cu
->queued
= 0;
4379 next_item
= item
->next
;
4383 dwarf2_queue_tail
= NULL
;
4386 /* Free all allocated queue entries. This function only releases anything if
4387 an error was thrown; if the queue was processed then it would have been
4388 freed as we went along. */
4391 dwarf2_release_queue (void *dummy
)
4393 struct dwarf2_queue_item
*item
, *last
;
4395 item
= dwarf2_queue
;
4398 /* Anything still marked queued is likely to be in an
4399 inconsistent state, so discard it. */
4400 if (item
->per_cu
->queued
)
4402 if (item
->per_cu
->cu
!= NULL
)
4403 free_one_cached_comp_unit (item
->per_cu
->cu
);
4404 item
->per_cu
->queued
= 0;
4412 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4415 /* Read in full symbols for PST, and anything it depends on. */
4418 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4420 struct dwarf2_per_cu_data
*per_cu
;
4421 struct cleanup
*back_to
;
4424 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4425 if (!pst
->dependencies
[i
]->readin
)
4427 /* Inform about additional files that need to be read in. */
4430 /* FIXME: i18n: Need to make this a single string. */
4431 fputs_filtered (" ", gdb_stdout
);
4433 fputs_filtered ("and ", gdb_stdout
);
4435 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4436 wrap_here (""); /* Flush output. */
4437 gdb_flush (gdb_stdout
);
4439 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4442 per_cu
= pst
->read_symtab_private
;
4446 /* It's an include file, no symbols to read for it.
4447 Everything is in the parent symtab. */
4452 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4455 /* Load the DIEs associated with PER_CU into memory. */
4458 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
4459 struct objfile
*objfile
)
4461 bfd
*abfd
= objfile
->obfd
;
4462 struct dwarf2_cu
*cu
;
4463 unsigned int offset
;
4464 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4465 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4466 struct attribute
*attr
;
4469 gdb_assert (! per_cu
->from_debug_types
);
4471 /* Set local variables from the partial symbol table info. */
4472 offset
= per_cu
->offset
;
4474 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4475 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4476 beg_of_comp_unit
= info_ptr
;
4478 if (per_cu
->cu
== NULL
)
4480 cu
= xmalloc (sizeof (*cu
));
4481 init_one_comp_unit (cu
, objfile
);
4485 /* If an error occurs while loading, release our storage. */
4486 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4488 /* Read in the comp_unit header. */
4489 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4491 /* Complete the cu_header. */
4492 cu
->header
.offset
= offset
;
4493 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4495 /* Read the abbrevs for this compilation unit. */
4496 dwarf2_read_abbrevs (abfd
, cu
);
4497 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4499 /* Link this compilation unit into the compilation unit tree. */
4501 cu
->per_cu
= per_cu
;
4503 /* Link this CU into read_in_chain. */
4504 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4505 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4510 info_ptr
+= cu
->header
.first_die_offset
;
4513 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4515 /* We try not to read any attributes in this function, because not
4516 all objfiles needed for references have been loaded yet, and symbol
4517 table processing isn't initialized. But we have to set the CU language,
4518 or we won't be able to build types correctly. */
4519 prepare_one_comp_unit (cu
, cu
->dies
);
4521 /* Similarly, if we do not read the producer, we can not apply
4522 producer-specific interpretation. */
4523 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4525 cu
->producer
= DW_STRING (attr
);
4529 do_cleanups (free_abbrevs_cleanup
);
4531 /* We've successfully allocated this compilation unit. Let our
4532 caller clean it up when finished with it. */
4533 discard_cleanups (free_cu_cleanup
);
4537 /* Add a DIE to the delayed physname list. */
4540 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4541 const char *name
, struct die_info
*die
,
4542 struct dwarf2_cu
*cu
)
4544 struct delayed_method_info mi
;
4546 mi
.fnfield_index
= fnfield_index
;
4550 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4553 /* A cleanup for freeing the delayed method list. */
4556 free_delayed_list (void *ptr
)
4558 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4559 if (cu
->method_list
!= NULL
)
4561 VEC_free (delayed_method_info
, cu
->method_list
);
4562 cu
->method_list
= NULL
;
4566 /* Compute the physnames of any methods on the CU's method list.
4568 The computation of method physnames is delayed in order to avoid the
4569 (bad) condition that one of the method's formal parameters is of an as yet
4573 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4576 struct delayed_method_info
*mi
;
4577 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4580 struct fn_fieldlist
*fn_flp
4581 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4582 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4583 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4587 /* Generate full symbol information for PST and CU, whose DIEs have
4588 already been loaded into memory. */
4591 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4593 struct dwarf2_cu
*cu
= per_cu
->cu
;
4594 struct objfile
*objfile
= per_cu
->objfile
;
4595 CORE_ADDR lowpc
, highpc
;
4596 struct symtab
*symtab
;
4597 struct cleanup
*back_to
, *delayed_list_cleanup
;
4600 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4603 back_to
= make_cleanup (really_free_pendings
, NULL
);
4604 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4606 cu
->list_in_scope
= &file_symbols
;
4608 dwarf2_find_base_address (cu
->dies
, cu
);
4610 /* Do line number decoding in read_file_scope () */
4611 process_die (cu
->dies
, cu
);
4613 /* Now that we have processed all the DIEs in the CU, all the types
4614 should be complete, and it should now be safe to compute all of the
4616 compute_delayed_physnames (cu
);
4617 do_cleanups (delayed_list_cleanup
);
4619 /* Some compilers don't define a DW_AT_high_pc attribute for the
4620 compilation unit. If the DW_AT_high_pc is missing, synthesize
4621 it, by scanning the DIE's below the compilation unit. */
4622 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4624 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4626 /* Set symtab language to language from DW_AT_language.
4627 If the compilation is from a C file generated by language preprocessors,
4628 do not set the language if it was already deduced by start_subfile. */
4630 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4632 symtab
->language
= cu
->language
;
4635 if (dwarf2_per_objfile
->using_index
)
4636 per_cu
->v
.quick
->symtab
= symtab
;
4639 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4640 pst
->symtab
= symtab
;
4644 do_cleanups (back_to
);
4647 /* Process a die and its children. */
4650 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4654 case DW_TAG_padding
:
4656 case DW_TAG_compile_unit
:
4657 read_file_scope (die
, cu
);
4659 case DW_TAG_type_unit
:
4660 read_type_unit_scope (die
, cu
);
4662 case DW_TAG_subprogram
:
4663 case DW_TAG_inlined_subroutine
:
4664 read_func_scope (die
, cu
);
4666 case DW_TAG_lexical_block
:
4667 case DW_TAG_try_block
:
4668 case DW_TAG_catch_block
:
4669 read_lexical_block_scope (die
, cu
);
4671 case DW_TAG_class_type
:
4672 case DW_TAG_interface_type
:
4673 case DW_TAG_structure_type
:
4674 case DW_TAG_union_type
:
4675 process_structure_scope (die
, cu
);
4677 case DW_TAG_enumeration_type
:
4678 process_enumeration_scope (die
, cu
);
4681 /* These dies have a type, but processing them does not create
4682 a symbol or recurse to process the children. Therefore we can
4683 read them on-demand through read_type_die. */
4684 case DW_TAG_subroutine_type
:
4685 case DW_TAG_set_type
:
4686 case DW_TAG_array_type
:
4687 case DW_TAG_pointer_type
:
4688 case DW_TAG_ptr_to_member_type
:
4689 case DW_TAG_reference_type
:
4690 case DW_TAG_string_type
:
4693 case DW_TAG_base_type
:
4694 case DW_TAG_subrange_type
:
4695 case DW_TAG_typedef
:
4696 /* Add a typedef symbol for the type definition, if it has a
4698 new_symbol (die
, read_type_die (die
, cu
), cu
);
4700 case DW_TAG_common_block
:
4701 read_common_block (die
, cu
);
4703 case DW_TAG_common_inclusion
:
4705 case DW_TAG_namespace
:
4706 processing_has_namespace_info
= 1;
4707 read_namespace (die
, cu
);
4710 processing_has_namespace_info
= 1;
4711 read_module (die
, cu
);
4713 case DW_TAG_imported_declaration
:
4714 case DW_TAG_imported_module
:
4715 processing_has_namespace_info
= 1;
4716 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4717 || cu
->language
!= language_fortran
))
4718 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4719 dwarf_tag_name (die
->tag
));
4720 read_import_statement (die
, cu
);
4723 new_symbol (die
, NULL
, cu
);
4728 /* A helper function for dwarf2_compute_name which determines whether DIE
4729 needs to have the name of the scope prepended to the name listed in the
4733 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4735 struct attribute
*attr
;
4739 case DW_TAG_namespace
:
4740 case DW_TAG_typedef
:
4741 case DW_TAG_class_type
:
4742 case DW_TAG_interface_type
:
4743 case DW_TAG_structure_type
:
4744 case DW_TAG_union_type
:
4745 case DW_TAG_enumeration_type
:
4746 case DW_TAG_enumerator
:
4747 case DW_TAG_subprogram
:
4751 case DW_TAG_variable
:
4752 case DW_TAG_constant
:
4753 /* We only need to prefix "globally" visible variables. These include
4754 any variable marked with DW_AT_external or any variable that
4755 lives in a namespace. [Variables in anonymous namespaces
4756 require prefixing, but they are not DW_AT_external.] */
4758 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4760 struct dwarf2_cu
*spec_cu
= cu
;
4762 return die_needs_namespace (die_specification (die
, &spec_cu
),
4766 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4767 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4768 && die
->parent
->tag
!= DW_TAG_module
)
4770 /* A variable in a lexical block of some kind does not need a
4771 namespace, even though in C++ such variables may be external
4772 and have a mangled name. */
4773 if (die
->parent
->tag
== DW_TAG_lexical_block
4774 || die
->parent
->tag
== DW_TAG_try_block
4775 || die
->parent
->tag
== DW_TAG_catch_block
4776 || die
->parent
->tag
== DW_TAG_subprogram
)
4785 /* Retrieve the last character from a mem_file. */
4788 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4790 char *last_char_p
= (char *) object
;
4793 *last_char_p
= buffer
[length
- 1];
4796 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4797 compute the physname for the object, which include a method's
4798 formal parameters (C++/Java) and return type (Java).
4800 For Ada, return the DIE's linkage name rather than the fully qualified
4801 name. PHYSNAME is ignored..
4803 The result is allocated on the objfile_obstack and canonicalized. */
4806 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4810 name
= dwarf2_name (die
, cu
);
4812 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4813 compute it by typename_concat inside GDB. */
4814 if (cu
->language
== language_ada
4815 || (cu
->language
== language_fortran
&& physname
))
4817 /* For Ada unit, we prefer the linkage name over the name, as
4818 the former contains the exported name, which the user expects
4819 to be able to reference. Ideally, we want the user to be able
4820 to reference this entity using either natural or linkage name,
4821 but we haven't started looking at this enhancement yet. */
4822 struct attribute
*attr
;
4824 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4826 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4827 if (attr
&& DW_STRING (attr
))
4828 return DW_STRING (attr
);
4831 /* These are the only languages we know how to qualify names in. */
4833 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4834 || cu
->language
== language_fortran
))
4836 if (die_needs_namespace (die
, cu
))
4840 struct ui_file
*buf
;
4842 prefix
= determine_prefix (die
, cu
);
4843 buf
= mem_fileopen ();
4844 if (*prefix
!= '\0')
4846 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4849 fputs_unfiltered (prefixed_name
, buf
);
4850 xfree (prefixed_name
);
4853 fputs_unfiltered (name
? name
: "", buf
);
4855 /* Template parameters may be specified in the DIE's DW_AT_name, or
4856 as children with DW_TAG_template_type_param or
4857 DW_TAG_value_type_param. If the latter, add them to the name
4858 here. If the name already has template parameters, then
4859 skip this step; some versions of GCC emit both, and
4860 it is more efficient to use the pre-computed name.
4862 Something to keep in mind about this process: it is very
4863 unlikely, or in some cases downright impossible, to produce
4864 something that will match the mangled name of a function.
4865 If the definition of the function has the same debug info,
4866 we should be able to match up with it anyway. But fallbacks
4867 using the minimal symbol, for instance to find a method
4868 implemented in a stripped copy of libstdc++, will not work.
4869 If we do not have debug info for the definition, we will have to
4870 match them up some other way.
4872 When we do name matching there is a related problem with function
4873 templates; two instantiated function templates are allowed to
4874 differ only by their return types, which we do not add here. */
4876 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4878 struct attribute
*attr
;
4879 struct die_info
*child
;
4882 die
->building_fullname
= 1;
4884 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4889 struct dwarf2_locexpr_baton
*baton
;
4892 if (child
->tag
!= DW_TAG_template_type_param
4893 && child
->tag
!= DW_TAG_template_value_param
)
4898 fputs_unfiltered ("<", buf
);
4902 fputs_unfiltered (", ", buf
);
4904 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4907 complaint (&symfile_complaints
,
4908 _("template parameter missing DW_AT_type"));
4909 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4912 type
= die_type (child
, cu
);
4914 if (child
->tag
== DW_TAG_template_type_param
)
4916 c_print_type (type
, "", buf
, -1, 0);
4920 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4923 complaint (&symfile_complaints
,
4924 _("template parameter missing "
4925 "DW_AT_const_value"));
4926 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4930 dwarf2_const_value_attr (attr
, type
, name
,
4931 &cu
->comp_unit_obstack
, cu
,
4932 &value
, &bytes
, &baton
);
4934 if (TYPE_NOSIGN (type
))
4935 /* GDB prints characters as NUMBER 'CHAR'. If that's
4936 changed, this can use value_print instead. */
4937 c_printchar (value
, type
, buf
);
4940 struct value_print_options opts
;
4943 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4947 else if (bytes
!= NULL
)
4949 v
= allocate_value (type
);
4950 memcpy (value_contents_writeable (v
), bytes
,
4951 TYPE_LENGTH (type
));
4954 v
= value_from_longest (type
, value
);
4956 /* Specify decimal so that we do not depend on
4958 get_formatted_print_options (&opts
, 'd');
4960 value_print (v
, buf
, &opts
);
4966 die
->building_fullname
= 0;
4970 /* Close the argument list, with a space if necessary
4971 (nested templates). */
4972 char last_char
= '\0';
4973 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4974 if (last_char
== '>')
4975 fputs_unfiltered (" >", buf
);
4977 fputs_unfiltered (">", buf
);
4981 /* For Java and C++ methods, append formal parameter type
4982 information, if PHYSNAME. */
4984 if (physname
&& die
->tag
== DW_TAG_subprogram
4985 && (cu
->language
== language_cplus
4986 || cu
->language
== language_java
))
4988 struct type
*type
= read_type_die (die
, cu
);
4990 c_type_print_args (type
, buf
, 0, cu
->language
);
4992 if (cu
->language
== language_java
)
4994 /* For java, we must append the return type to method
4996 if (die
->tag
== DW_TAG_subprogram
)
4997 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
5000 else if (cu
->language
== language_cplus
)
5002 /* Assume that an artificial first parameter is
5003 "this", but do not crash if it is not. RealView
5004 marks unnamed (and thus unused) parameters as
5005 artificial; there is no way to differentiate
5007 if (TYPE_NFIELDS (type
) > 0
5008 && TYPE_FIELD_ARTIFICIAL (type
, 0)
5009 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
5010 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
5012 fputs_unfiltered (" const", buf
);
5016 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
5018 ui_file_delete (buf
);
5020 if (cu
->language
== language_cplus
)
5023 = dwarf2_canonicalize_name (name
, cu
,
5024 &cu
->objfile
->objfile_obstack
);
5035 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5036 If scope qualifiers are appropriate they will be added. The result
5037 will be allocated on the objfile_obstack, or NULL if the DIE does
5038 not have a name. NAME may either be from a previous call to
5039 dwarf2_name or NULL.
5041 The output string will be canonicalized (if C++/Java). */
5044 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5046 return dwarf2_compute_name (name
, die
, cu
, 0);
5049 /* Construct a physname for the given DIE in CU. NAME may either be
5050 from a previous call to dwarf2_name or NULL. The result will be
5051 allocated on the objfile_objstack or NULL if the DIE does not have a
5054 The output string will be canonicalized (if C++/Java). */
5057 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5059 return dwarf2_compute_name (name
, die
, cu
, 1);
5062 /* Read the import statement specified by the given die and record it. */
5065 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
5067 struct attribute
*import_attr
;
5068 struct die_info
*imported_die
;
5069 struct dwarf2_cu
*imported_cu
;
5070 const char *imported_name
;
5071 const char *imported_name_prefix
;
5072 const char *canonical_name
;
5073 const char *import_alias
;
5074 const char *imported_declaration
= NULL
;
5075 const char *import_prefix
;
5079 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5080 if (import_attr
== NULL
)
5082 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5083 dwarf_tag_name (die
->tag
));
5088 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
5089 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5090 if (imported_name
== NULL
)
5092 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5094 The import in the following code:
5108 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5109 <52> DW_AT_decl_file : 1
5110 <53> DW_AT_decl_line : 6
5111 <54> DW_AT_import : <0x75>
5112 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5114 <5b> DW_AT_decl_file : 1
5115 <5c> DW_AT_decl_line : 2
5116 <5d> DW_AT_type : <0x6e>
5118 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5119 <76> DW_AT_byte_size : 4
5120 <77> DW_AT_encoding : 5 (signed)
5122 imports the wrong die ( 0x75 instead of 0x58 ).
5123 This case will be ignored until the gcc bug is fixed. */
5127 /* Figure out the local name after import. */
5128 import_alias
= dwarf2_name (die
, cu
);
5130 /* Figure out where the statement is being imported to. */
5131 import_prefix
= determine_prefix (die
, cu
);
5133 /* Figure out what the scope of the imported die is and prepend it
5134 to the name of the imported die. */
5135 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5137 if (imported_die
->tag
!= DW_TAG_namespace
5138 && imported_die
->tag
!= DW_TAG_module
)
5140 imported_declaration
= imported_name
;
5141 canonical_name
= imported_name_prefix
;
5143 else if (strlen (imported_name_prefix
) > 0)
5145 temp
= alloca (strlen (imported_name_prefix
)
5146 + 2 + strlen (imported_name
) + 1);
5147 strcpy (temp
, imported_name_prefix
);
5148 strcat (temp
, "::");
5149 strcat (temp
, imported_name
);
5150 canonical_name
= temp
;
5153 canonical_name
= imported_name
;
5155 cp_add_using_directive (import_prefix
,
5158 imported_declaration
,
5159 &cu
->objfile
->objfile_obstack
);
5163 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5165 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5168 /* Cleanup function for read_file_scope. */
5171 free_cu_line_header (void *arg
)
5173 struct dwarf2_cu
*cu
= arg
;
5175 free_line_header (cu
->line_header
);
5176 cu
->line_header
= NULL
;
5180 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5181 char **name
, char **comp_dir
)
5183 struct attribute
*attr
;
5188 /* Find the filename. Do not use dwarf2_name here, since the filename
5189 is not a source language identifier. */
5190 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5193 *name
= DW_STRING (attr
);
5196 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5198 *comp_dir
= DW_STRING (attr
);
5199 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5201 *comp_dir
= ldirname (*name
);
5202 if (*comp_dir
!= NULL
)
5203 make_cleanup (xfree
, *comp_dir
);
5205 if (*comp_dir
!= NULL
)
5207 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5208 directory, get rid of it. */
5209 char *cp
= strchr (*comp_dir
, ':');
5211 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5216 *name
= "<unknown>";
5219 /* Process DW_TAG_compile_unit. */
5222 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5224 struct objfile
*objfile
= cu
->objfile
;
5225 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5226 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5227 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5228 struct attribute
*attr
;
5230 char *comp_dir
= NULL
;
5231 struct die_info
*child_die
;
5232 bfd
*abfd
= objfile
->obfd
;
5233 struct line_header
*line_header
= 0;
5236 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5238 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5240 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5241 from finish_block. */
5242 if (lowpc
== ((CORE_ADDR
) -1))
5247 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5249 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5252 set_cu_language (DW_UNSND (attr
), cu
);
5255 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5257 cu
->producer
= DW_STRING (attr
);
5259 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5260 standardised yet. As a workaround for the language detection we fall
5261 back to the DW_AT_producer string. */
5262 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5263 cu
->language
= language_opencl
;
5265 /* We assume that we're processing GCC output. */
5266 processing_gcc_compilation
= 2;
5268 processing_has_namespace_info
= 0;
5270 start_symtab (name
, comp_dir
, lowpc
);
5271 record_debugformat ("DWARF 2");
5272 record_producer (cu
->producer
);
5274 initialize_cu_func_list (cu
);
5276 /* Decode line number information if present. We do this before
5277 processing child DIEs, so that the line header table is available
5278 for DW_AT_decl_file. */
5279 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5282 unsigned int line_offset
= DW_UNSND (attr
);
5283 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5286 cu
->line_header
= line_header
;
5287 make_cleanup (free_cu_line_header
, cu
);
5288 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5292 /* Process all dies in compilation unit. */
5293 if (die
->child
!= NULL
)
5295 child_die
= die
->child
;
5296 while (child_die
&& child_die
->tag
)
5298 process_die (child_die
, cu
);
5299 child_die
= sibling_die (child_die
);
5303 /* Decode macro information, if present. Dwarf 2 macro information
5304 refers to information in the line number info statement program
5305 header, so we can only read it if we've read the header
5307 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5308 if (attr
&& line_header
)
5310 unsigned int macro_offset
= DW_UNSND (attr
);
5312 dwarf_decode_macros (line_header
, macro_offset
,
5313 comp_dir
, abfd
, cu
);
5315 do_cleanups (back_to
);
5318 /* Process DW_TAG_type_unit.
5319 For TUs we want to skip the first top level sibling if it's not the
5320 actual type being defined by this TU. In this case the first top
5321 level sibling is there to provide context only. */
5324 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5326 struct objfile
*objfile
= cu
->objfile
;
5327 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5329 struct attribute
*attr
;
5331 char *comp_dir
= NULL
;
5332 struct die_info
*child_die
;
5333 bfd
*abfd
= objfile
->obfd
;
5335 /* start_symtab needs a low pc, but we don't really have one.
5336 Do what read_file_scope would do in the absence of such info. */
5337 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5339 /* Find the filename. Do not use dwarf2_name here, since the filename
5340 is not a source language identifier. */
5341 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5343 name
= DW_STRING (attr
);
5345 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5347 comp_dir
= DW_STRING (attr
);
5348 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5350 comp_dir
= ldirname (name
);
5351 if (comp_dir
!= NULL
)
5352 make_cleanup (xfree
, comp_dir
);
5358 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5360 set_cu_language (DW_UNSND (attr
), cu
);
5362 /* This isn't technically needed today. It is done for symmetry
5363 with read_file_scope. */
5364 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5366 cu
->producer
= DW_STRING (attr
);
5368 /* We assume that we're processing GCC output. */
5369 processing_gcc_compilation
= 2;
5371 processing_has_namespace_info
= 0;
5373 start_symtab (name
, comp_dir
, lowpc
);
5374 record_debugformat ("DWARF 2");
5375 record_producer (cu
->producer
);
5377 /* Process the dies in the type unit. */
5378 if (die
->child
== NULL
)
5380 dump_die_for_error (die
);
5381 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5382 bfd_get_filename (abfd
));
5385 child_die
= die
->child
;
5387 while (child_die
&& child_die
->tag
)
5389 process_die (child_die
, cu
);
5391 child_die
= sibling_die (child_die
);
5394 do_cleanups (back_to
);
5398 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5399 struct dwarf2_cu
*cu
)
5401 struct function_range
*thisfn
;
5403 thisfn
= (struct function_range
*)
5404 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5405 thisfn
->name
= name
;
5406 thisfn
->lowpc
= lowpc
;
5407 thisfn
->highpc
= highpc
;
5408 thisfn
->seen_line
= 0;
5409 thisfn
->next
= NULL
;
5411 if (cu
->last_fn
== NULL
)
5412 cu
->first_fn
= thisfn
;
5414 cu
->last_fn
->next
= thisfn
;
5416 cu
->last_fn
= thisfn
;
5419 /* qsort helper for inherit_abstract_dies. */
5422 unsigned_int_compar (const void *ap
, const void *bp
)
5424 unsigned int a
= *(unsigned int *) ap
;
5425 unsigned int b
= *(unsigned int *) bp
;
5427 return (a
> b
) - (b
> a
);
5430 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5431 Inherit only the children of the DW_AT_abstract_origin DIE not being
5432 already referenced by DW_AT_abstract_origin from the children of the
5436 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5438 struct die_info
*child_die
;
5439 unsigned die_children_count
;
5440 /* CU offsets which were referenced by children of the current DIE. */
5442 unsigned *offsets_end
, *offsetp
;
5443 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5444 struct die_info
*origin_die
;
5445 /* Iterator of the ORIGIN_DIE children. */
5446 struct die_info
*origin_child_die
;
5447 struct cleanup
*cleanups
;
5448 struct attribute
*attr
;
5449 struct dwarf2_cu
*origin_cu
;
5450 struct pending
**origin_previous_list_in_scope
;
5452 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5456 /* Note that following die references may follow to a die in a
5460 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5462 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5464 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5465 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5467 if (die
->tag
!= origin_die
->tag
5468 && !(die
->tag
== DW_TAG_inlined_subroutine
5469 && origin_die
->tag
== DW_TAG_subprogram
))
5470 complaint (&symfile_complaints
,
5471 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5472 die
->offset
, origin_die
->offset
);
5474 child_die
= die
->child
;
5475 die_children_count
= 0;
5476 while (child_die
&& child_die
->tag
)
5478 child_die
= sibling_die (child_die
);
5479 die_children_count
++;
5481 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5482 cleanups
= make_cleanup (xfree
, offsets
);
5484 offsets_end
= offsets
;
5485 child_die
= die
->child
;
5486 while (child_die
&& child_die
->tag
)
5488 /* For each CHILD_DIE, find the corresponding child of
5489 ORIGIN_DIE. If there is more than one layer of
5490 DW_AT_abstract_origin, follow them all; there shouldn't be,
5491 but GCC versions at least through 4.4 generate this (GCC PR
5493 struct die_info
*child_origin_die
= child_die
;
5494 struct dwarf2_cu
*child_origin_cu
= cu
;
5498 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5502 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5506 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5507 counterpart may exist. */
5508 if (child_origin_die
!= child_die
)
5510 if (child_die
->tag
!= child_origin_die
->tag
5511 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5512 && child_origin_die
->tag
== DW_TAG_subprogram
))
5513 complaint (&symfile_complaints
,
5514 _("Child DIE 0x%x and its abstract origin 0x%x have "
5515 "different tags"), child_die
->offset
,
5516 child_origin_die
->offset
);
5517 if (child_origin_die
->parent
!= origin_die
)
5518 complaint (&symfile_complaints
,
5519 _("Child DIE 0x%x and its abstract origin 0x%x have "
5520 "different parents"), child_die
->offset
,
5521 child_origin_die
->offset
);
5523 *offsets_end
++ = child_origin_die
->offset
;
5525 child_die
= sibling_die (child_die
);
5527 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5528 unsigned_int_compar
);
5529 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5530 if (offsetp
[-1] == *offsetp
)
5531 complaint (&symfile_complaints
,
5532 _("Multiple children of DIE 0x%x refer "
5533 "to DIE 0x%x as their abstract origin"),
5534 die
->offset
, *offsetp
);
5537 origin_child_die
= origin_die
->child
;
5538 while (origin_child_die
&& origin_child_die
->tag
)
5540 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5541 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5543 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5545 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5546 process_die (origin_child_die
, origin_cu
);
5548 origin_child_die
= sibling_die (origin_child_die
);
5550 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5552 do_cleanups (cleanups
);
5556 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5558 struct objfile
*objfile
= cu
->objfile
;
5559 struct context_stack
*new;
5562 struct die_info
*child_die
;
5563 struct attribute
*attr
, *call_line
, *call_file
;
5566 struct block
*block
;
5567 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5568 VEC (symbolp
) *template_args
= NULL
;
5569 struct template_symbol
*templ_func
= NULL
;
5573 /* If we do not have call site information, we can't show the
5574 caller of this inlined function. That's too confusing, so
5575 only use the scope for local variables. */
5576 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5577 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5578 if (call_line
== NULL
|| call_file
== NULL
)
5580 read_lexical_block_scope (die
, cu
);
5585 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5587 name
= dwarf2_name (die
, cu
);
5589 /* Ignore functions with missing or empty names. These are actually
5590 illegal according to the DWARF standard. */
5593 complaint (&symfile_complaints
,
5594 _("missing name for subprogram DIE at %d"), die
->offset
);
5598 /* Ignore functions with missing or invalid low and high pc attributes. */
5599 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5601 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5602 if (!attr
|| !DW_UNSND (attr
))
5603 complaint (&symfile_complaints
,
5604 _("cannot get low and high bounds "
5605 "for subprogram DIE at %d"),
5613 /* Record the function range for dwarf_decode_lines. */
5614 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5616 /* If we have any template arguments, then we must allocate a
5617 different sort of symbol. */
5618 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5620 if (child_die
->tag
== DW_TAG_template_type_param
5621 || child_die
->tag
== DW_TAG_template_value_param
)
5623 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5624 struct template_symbol
);
5625 templ_func
->base
.is_cplus_template_function
= 1;
5630 new = push_context (0, lowpc
);
5631 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5632 (struct symbol
*) templ_func
);
5634 /* If there is a location expression for DW_AT_frame_base, record
5636 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5638 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5639 expression is being recorded directly in the function's symbol
5640 and not in a separate frame-base object. I guess this hack is
5641 to avoid adding some sort of frame-base adjunct/annex to the
5642 function's symbol :-(. The problem with doing this is that it
5643 results in a function symbol with a location expression that
5644 has nothing to do with the location of the function, ouch! The
5645 relationship should be: a function's symbol has-a frame base; a
5646 frame-base has-a location expression. */
5647 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5649 cu
->list_in_scope
= &local_symbols
;
5651 if (die
->child
!= NULL
)
5653 child_die
= die
->child
;
5654 while (child_die
&& child_die
->tag
)
5656 if (child_die
->tag
== DW_TAG_template_type_param
5657 || child_die
->tag
== DW_TAG_template_value_param
)
5659 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5662 VEC_safe_push (symbolp
, template_args
, arg
);
5665 process_die (child_die
, cu
);
5666 child_die
= sibling_die (child_die
);
5670 inherit_abstract_dies (die
, cu
);
5672 /* If we have a DW_AT_specification, we might need to import using
5673 directives from the context of the specification DIE. See the
5674 comment in determine_prefix. */
5675 if (cu
->language
== language_cplus
5676 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5678 struct dwarf2_cu
*spec_cu
= cu
;
5679 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5683 child_die
= spec_die
->child
;
5684 while (child_die
&& child_die
->tag
)
5686 if (child_die
->tag
== DW_TAG_imported_module
)
5687 process_die (child_die
, spec_cu
);
5688 child_die
= sibling_die (child_die
);
5691 /* In some cases, GCC generates specification DIEs that
5692 themselves contain DW_AT_specification attributes. */
5693 spec_die
= die_specification (spec_die
, &spec_cu
);
5697 new = pop_context ();
5698 /* Make a block for the local symbols within. */
5699 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5700 lowpc
, highpc
, objfile
);
5702 /* For C++, set the block's scope. */
5703 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5704 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5705 determine_prefix (die
, cu
),
5706 processing_has_namespace_info
);
5708 /* If we have address ranges, record them. */
5709 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5711 /* Attach template arguments to function. */
5712 if (! VEC_empty (symbolp
, template_args
))
5714 gdb_assert (templ_func
!= NULL
);
5716 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5717 templ_func
->template_arguments
5718 = obstack_alloc (&objfile
->objfile_obstack
,
5719 (templ_func
->n_template_arguments
5720 * sizeof (struct symbol
*)));
5721 memcpy (templ_func
->template_arguments
,
5722 VEC_address (symbolp
, template_args
),
5723 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5724 VEC_free (symbolp
, template_args
);
5727 /* In C++, we can have functions nested inside functions (e.g., when
5728 a function declares a class that has methods). This means that
5729 when we finish processing a function scope, we may need to go
5730 back to building a containing block's symbol lists. */
5731 local_symbols
= new->locals
;
5732 param_symbols
= new->params
;
5733 using_directives
= new->using_directives
;
5735 /* If we've finished processing a top-level function, subsequent
5736 symbols go in the file symbol list. */
5737 if (outermost_context_p ())
5738 cu
->list_in_scope
= &file_symbols
;
5741 /* Process all the DIES contained within a lexical block scope. Start
5742 a new scope, process the dies, and then close the scope. */
5745 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5747 struct objfile
*objfile
= cu
->objfile
;
5748 struct context_stack
*new;
5749 CORE_ADDR lowpc
, highpc
;
5750 struct die_info
*child_die
;
5753 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5755 /* Ignore blocks with missing or invalid low and high pc attributes. */
5756 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5757 as multiple lexical blocks? Handling children in a sane way would
5758 be nasty. Might be easier to properly extend generic blocks to
5760 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5765 push_context (0, lowpc
);
5766 if (die
->child
!= NULL
)
5768 child_die
= die
->child
;
5769 while (child_die
&& child_die
->tag
)
5771 process_die (child_die
, cu
);
5772 child_die
= sibling_die (child_die
);
5775 new = pop_context ();
5777 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5780 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5783 /* Note that recording ranges after traversing children, as we
5784 do here, means that recording a parent's ranges entails
5785 walking across all its children's ranges as they appear in
5786 the address map, which is quadratic behavior.
5788 It would be nicer to record the parent's ranges before
5789 traversing its children, simply overriding whatever you find
5790 there. But since we don't even decide whether to create a
5791 block until after we've traversed its children, that's hard
5793 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5795 local_symbols
= new->locals
;
5796 using_directives
= new->using_directives
;
5799 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5800 Return 1 if the attributes are present and valid, otherwise, return 0.
5801 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5804 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5805 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5806 struct partial_symtab
*ranges_pst
)
5808 struct objfile
*objfile
= cu
->objfile
;
5809 struct comp_unit_head
*cu_header
= &cu
->header
;
5810 bfd
*obfd
= objfile
->obfd
;
5811 unsigned int addr_size
= cu_header
->addr_size
;
5812 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5813 /* Base address selection entry. */
5824 found_base
= cu
->base_known
;
5825 base
= cu
->base_address
;
5827 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5828 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5830 complaint (&symfile_complaints
,
5831 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5835 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5837 /* Read in the largest possible address. */
5838 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5839 if ((marker
& mask
) == mask
)
5841 /* If we found the largest possible address, then
5842 read the base address. */
5843 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5844 buffer
+= 2 * addr_size
;
5845 offset
+= 2 * addr_size
;
5851 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5855 CORE_ADDR range_beginning
, range_end
;
5857 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5858 buffer
+= addr_size
;
5859 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5860 buffer
+= addr_size
;
5861 offset
+= 2 * addr_size
;
5863 /* An end of list marker is a pair of zero addresses. */
5864 if (range_beginning
== 0 && range_end
== 0)
5865 /* Found the end of list entry. */
5868 /* Each base address selection entry is a pair of 2 values.
5869 The first is the largest possible address, the second is
5870 the base address. Check for a base address here. */
5871 if ((range_beginning
& mask
) == mask
)
5873 /* If we found the largest possible address, then
5874 read the base address. */
5875 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5882 /* We have no valid base address for the ranges
5884 complaint (&symfile_complaints
,
5885 _("Invalid .debug_ranges data (no base address)"));
5889 if (range_beginning
> range_end
)
5891 /* Inverted range entries are invalid. */
5892 complaint (&symfile_complaints
,
5893 _("Invalid .debug_ranges data (inverted range)"));
5897 /* Empty range entries have no effect. */
5898 if (range_beginning
== range_end
)
5901 range_beginning
+= base
;
5904 if (ranges_pst
!= NULL
)
5905 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5906 range_beginning
+ baseaddr
,
5907 range_end
- 1 + baseaddr
,
5910 /* FIXME: This is recording everything as a low-high
5911 segment of consecutive addresses. We should have a
5912 data structure for discontiguous block ranges
5916 low
= range_beginning
;
5922 if (range_beginning
< low
)
5923 low
= range_beginning
;
5924 if (range_end
> high
)
5930 /* If the first entry is an end-of-list marker, the range
5931 describes an empty scope, i.e. no instructions. */
5937 *high_return
= high
;
5941 /* Get low and high pc attributes from a die. Return 1 if the attributes
5942 are present and valid, otherwise, return 0. Return -1 if the range is
5943 discontinuous, i.e. derived from DW_AT_ranges information. */
5945 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5946 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5947 struct partial_symtab
*pst
)
5949 struct attribute
*attr
;
5954 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5957 high
= DW_ADDR (attr
);
5958 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5960 low
= DW_ADDR (attr
);
5962 /* Found high w/o low attribute. */
5965 /* Found consecutive range of addresses. */
5970 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5973 /* Value of the DW_AT_ranges attribute is the offset in the
5974 .debug_ranges section. */
5975 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5977 /* Found discontinuous range of addresses. */
5985 /* When using the GNU linker, .gnu.linkonce. sections are used to
5986 eliminate duplicate copies of functions and vtables and such.
5987 The linker will arbitrarily choose one and discard the others.
5988 The AT_*_pc values for such functions refer to local labels in
5989 these sections. If the section from that file was discarded, the
5990 labels are not in the output, so the relocs get a value of 0.
5991 If this is a discarded function, mark the pc bounds as invalid,
5992 so that GDB will ignore it. */
5993 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
6001 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
6002 its low and high PC addresses. Do nothing if these addresses could not
6003 be determined. Otherwise, set LOWPC to the low address if it is smaller,
6004 and HIGHPC to the high address if greater than HIGHPC. */
6007 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
6008 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6009 struct dwarf2_cu
*cu
)
6011 CORE_ADDR low
, high
;
6012 struct die_info
*child
= die
->child
;
6014 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
6016 *lowpc
= min (*lowpc
, low
);
6017 *highpc
= max (*highpc
, high
);
6020 /* If the language does not allow nested subprograms (either inside
6021 subprograms or lexical blocks), we're done. */
6022 if (cu
->language
!= language_ada
)
6025 /* Check all the children of the given DIE. If it contains nested
6026 subprograms, then check their pc bounds. Likewise, we need to
6027 check lexical blocks as well, as they may also contain subprogram
6029 while (child
&& child
->tag
)
6031 if (child
->tag
== DW_TAG_subprogram
6032 || child
->tag
== DW_TAG_lexical_block
)
6033 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
6034 child
= sibling_die (child
);
6038 /* Get the low and high pc's represented by the scope DIE, and store
6039 them in *LOWPC and *HIGHPC. If the correct values can't be
6040 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6043 get_scope_pc_bounds (struct die_info
*die
,
6044 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6045 struct dwarf2_cu
*cu
)
6047 CORE_ADDR best_low
= (CORE_ADDR
) -1;
6048 CORE_ADDR best_high
= (CORE_ADDR
) 0;
6049 CORE_ADDR current_low
, current_high
;
6051 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
6053 best_low
= current_low
;
6054 best_high
= current_high
;
6058 struct die_info
*child
= die
->child
;
6060 while (child
&& child
->tag
)
6062 switch (child
->tag
) {
6063 case DW_TAG_subprogram
:
6064 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
6066 case DW_TAG_namespace
:
6068 /* FIXME: carlton/2004-01-16: Should we do this for
6069 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6070 that current GCC's always emit the DIEs corresponding
6071 to definitions of methods of classes as children of a
6072 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6073 the DIEs giving the declarations, which could be
6074 anywhere). But I don't see any reason why the
6075 standards says that they have to be there. */
6076 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
6078 if (current_low
!= ((CORE_ADDR
) -1))
6080 best_low
= min (best_low
, current_low
);
6081 best_high
= max (best_high
, current_high
);
6089 child
= sibling_die (child
);
6094 *highpc
= best_high
;
6097 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6100 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
6101 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
6103 struct attribute
*attr
;
6105 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6108 CORE_ADDR high
= DW_ADDR (attr
);
6110 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6113 CORE_ADDR low
= DW_ADDR (attr
);
6115 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
6119 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6122 bfd
*obfd
= cu
->objfile
->obfd
;
6124 /* The value of the DW_AT_ranges attribute is the offset of the
6125 address range list in the .debug_ranges section. */
6126 unsigned long offset
= DW_UNSND (attr
);
6127 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6129 /* For some target architectures, but not others, the
6130 read_address function sign-extends the addresses it returns.
6131 To recognize base address selection entries, we need a
6133 unsigned int addr_size
= cu
->header
.addr_size
;
6134 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6136 /* The base address, to which the next pair is relative. Note
6137 that this 'base' is a DWARF concept: most entries in a range
6138 list are relative, to reduce the number of relocs against the
6139 debugging information. This is separate from this function's
6140 'baseaddr' argument, which GDB uses to relocate debugging
6141 information from a shared library based on the address at
6142 which the library was loaded. */
6143 CORE_ADDR base
= cu
->base_address
;
6144 int base_known
= cu
->base_known
;
6146 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
6147 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6149 complaint (&symfile_complaints
,
6150 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6157 unsigned int bytes_read
;
6158 CORE_ADDR start
, end
;
6160 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6161 buffer
+= bytes_read
;
6162 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6163 buffer
+= bytes_read
;
6165 /* Did we find the end of the range list? */
6166 if (start
== 0 && end
== 0)
6169 /* Did we find a base address selection entry? */
6170 else if ((start
& base_select_mask
) == base_select_mask
)
6176 /* We found an ordinary address range. */
6181 complaint (&symfile_complaints
,
6182 _("Invalid .debug_ranges data "
6183 "(no base address)"));
6189 /* Inverted range entries are invalid. */
6190 complaint (&symfile_complaints
,
6191 _("Invalid .debug_ranges data "
6192 "(inverted range)"));
6196 /* Empty range entries have no effect. */
6200 record_block_range (block
,
6201 baseaddr
+ base
+ start
,
6202 baseaddr
+ base
+ end
- 1);
6208 /* Add an aggregate field to the field list. */
6211 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6212 struct dwarf2_cu
*cu
)
6214 struct objfile
*objfile
= cu
->objfile
;
6215 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6216 struct nextfield
*new_field
;
6217 struct attribute
*attr
;
6219 char *fieldname
= "";
6221 /* Allocate a new field list entry and link it in. */
6222 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6223 make_cleanup (xfree
, new_field
);
6224 memset (new_field
, 0, sizeof (struct nextfield
));
6226 if (die
->tag
== DW_TAG_inheritance
)
6228 new_field
->next
= fip
->baseclasses
;
6229 fip
->baseclasses
= new_field
;
6233 new_field
->next
= fip
->fields
;
6234 fip
->fields
= new_field
;
6238 /* Handle accessibility and virtuality of field.
6239 The default accessibility for members is public, the default
6240 accessibility for inheritance is private. */
6241 if (die
->tag
!= DW_TAG_inheritance
)
6242 new_field
->accessibility
= DW_ACCESS_public
;
6244 new_field
->accessibility
= DW_ACCESS_private
;
6245 new_field
->virtuality
= DW_VIRTUALITY_none
;
6247 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6249 new_field
->accessibility
= DW_UNSND (attr
);
6250 if (new_field
->accessibility
!= DW_ACCESS_public
)
6251 fip
->non_public_fields
= 1;
6252 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6254 new_field
->virtuality
= DW_UNSND (attr
);
6256 fp
= &new_field
->field
;
6258 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6260 /* Data member other than a C++ static data member. */
6262 /* Get type of field. */
6263 fp
->type
= die_type (die
, cu
);
6265 SET_FIELD_BITPOS (*fp
, 0);
6267 /* Get bit size of field (zero if none). */
6268 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6271 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6275 FIELD_BITSIZE (*fp
) = 0;
6278 /* Get bit offset of field. */
6279 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6282 int byte_offset
= 0;
6284 if (attr_form_is_section_offset (attr
))
6285 dwarf2_complex_location_expr_complaint ();
6286 else if (attr_form_is_constant (attr
))
6287 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6288 else if (attr_form_is_block (attr
))
6289 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6291 dwarf2_complex_location_expr_complaint ();
6293 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6295 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6298 if (gdbarch_bits_big_endian (gdbarch
))
6300 /* For big endian bits, the DW_AT_bit_offset gives the
6301 additional bit offset from the MSB of the containing
6302 anonymous object to the MSB of the field. We don't
6303 have to do anything special since we don't need to
6304 know the size of the anonymous object. */
6305 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6309 /* For little endian bits, compute the bit offset to the
6310 MSB of the anonymous object, subtract off the number of
6311 bits from the MSB of the field to the MSB of the
6312 object, and then subtract off the number of bits of
6313 the field itself. The result is the bit offset of
6314 the LSB of the field. */
6316 int bit_offset
= DW_UNSND (attr
);
6318 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6321 /* The size of the anonymous object containing
6322 the bit field is explicit, so use the
6323 indicated size (in bytes). */
6324 anonymous_size
= DW_UNSND (attr
);
6328 /* The size of the anonymous object containing
6329 the bit field must be inferred from the type
6330 attribute of the data member containing the
6332 anonymous_size
= TYPE_LENGTH (fp
->type
);
6334 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6335 - bit_offset
- FIELD_BITSIZE (*fp
);
6339 /* Get name of field. */
6340 fieldname
= dwarf2_name (die
, cu
);
6341 if (fieldname
== NULL
)
6344 /* The name is already allocated along with this objfile, so we don't
6345 need to duplicate it for the type. */
6346 fp
->name
= fieldname
;
6348 /* Change accessibility for artificial fields (e.g. virtual table
6349 pointer or virtual base class pointer) to private. */
6350 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6352 FIELD_ARTIFICIAL (*fp
) = 1;
6353 new_field
->accessibility
= DW_ACCESS_private
;
6354 fip
->non_public_fields
= 1;
6357 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6359 /* C++ static member. */
6361 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6362 is a declaration, but all versions of G++ as of this writing
6363 (so through at least 3.2.1) incorrectly generate
6364 DW_TAG_variable tags. */
6368 /* Get name of field. */
6369 fieldname
= dwarf2_name (die
, cu
);
6370 if (fieldname
== NULL
)
6373 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6375 /* Only create a symbol if this is an external value.
6376 new_symbol checks this and puts the value in the global symbol
6377 table, which we want. If it is not external, new_symbol
6378 will try to put the value in cu->list_in_scope which is wrong. */
6379 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6381 /* A static const member, not much different than an enum as far as
6382 we're concerned, except that we can support more types. */
6383 new_symbol (die
, NULL
, cu
);
6386 /* Get physical name. */
6387 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6389 /* The name is already allocated along with this objfile, so we don't
6390 need to duplicate it for the type. */
6391 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6392 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6393 FIELD_NAME (*fp
) = fieldname
;
6395 else if (die
->tag
== DW_TAG_inheritance
)
6397 /* C++ base class field. */
6398 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6401 int byte_offset
= 0;
6403 if (attr_form_is_section_offset (attr
))
6404 dwarf2_complex_location_expr_complaint ();
6405 else if (attr_form_is_constant (attr
))
6406 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6407 else if (attr_form_is_block (attr
))
6408 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6410 dwarf2_complex_location_expr_complaint ();
6412 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6414 FIELD_BITSIZE (*fp
) = 0;
6415 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6416 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6417 fip
->nbaseclasses
++;
6421 /* Add a typedef defined in the scope of the FIP's class. */
6424 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6425 struct dwarf2_cu
*cu
)
6427 struct objfile
*objfile
= cu
->objfile
;
6428 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6429 struct typedef_field_list
*new_field
;
6430 struct attribute
*attr
;
6431 struct typedef_field
*fp
;
6432 char *fieldname
= "";
6434 /* Allocate a new field list entry and link it in. */
6435 new_field
= xzalloc (sizeof (*new_field
));
6436 make_cleanup (xfree
, new_field
);
6438 gdb_assert (die
->tag
== DW_TAG_typedef
);
6440 fp
= &new_field
->field
;
6442 /* Get name of field. */
6443 fp
->name
= dwarf2_name (die
, cu
);
6444 if (fp
->name
== NULL
)
6447 fp
->type
= read_type_die (die
, cu
);
6449 new_field
->next
= fip
->typedef_field_list
;
6450 fip
->typedef_field_list
= new_field
;
6451 fip
->typedef_field_list_count
++;
6454 /* Create the vector of fields, and attach it to the type. */
6457 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6458 struct dwarf2_cu
*cu
)
6460 int nfields
= fip
->nfields
;
6462 /* Record the field count, allocate space for the array of fields,
6463 and create blank accessibility bitfields if necessary. */
6464 TYPE_NFIELDS (type
) = nfields
;
6465 TYPE_FIELDS (type
) = (struct field
*)
6466 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6467 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6469 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6471 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6473 TYPE_FIELD_PRIVATE_BITS (type
) =
6474 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6475 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6477 TYPE_FIELD_PROTECTED_BITS (type
) =
6478 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6479 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6481 TYPE_FIELD_IGNORE_BITS (type
) =
6482 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6483 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6486 /* If the type has baseclasses, allocate and clear a bit vector for
6487 TYPE_FIELD_VIRTUAL_BITS. */
6488 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6490 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6491 unsigned char *pointer
;
6493 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6494 pointer
= TYPE_ALLOC (type
, num_bytes
);
6495 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6496 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6497 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6500 /* Copy the saved-up fields into the field vector. Start from the head of
6501 the list, adding to the tail of the field array, so that they end up in
6502 the same order in the array in which they were added to the list. */
6503 while (nfields
-- > 0)
6505 struct nextfield
*fieldp
;
6509 fieldp
= fip
->fields
;
6510 fip
->fields
= fieldp
->next
;
6514 fieldp
= fip
->baseclasses
;
6515 fip
->baseclasses
= fieldp
->next
;
6518 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6519 switch (fieldp
->accessibility
)
6521 case DW_ACCESS_private
:
6522 if (cu
->language
!= language_ada
)
6523 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6526 case DW_ACCESS_protected
:
6527 if (cu
->language
!= language_ada
)
6528 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6531 case DW_ACCESS_public
:
6535 /* Unknown accessibility. Complain and treat it as public. */
6537 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6538 fieldp
->accessibility
);
6542 if (nfields
< fip
->nbaseclasses
)
6544 switch (fieldp
->virtuality
)
6546 case DW_VIRTUALITY_virtual
:
6547 case DW_VIRTUALITY_pure_virtual
:
6548 if (cu
->language
== language_ada
)
6549 error (_("unexpected virtuality in component of Ada type"));
6550 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6557 /* Add a member function to the proper fieldlist. */
6560 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6561 struct type
*type
, struct dwarf2_cu
*cu
)
6563 struct objfile
*objfile
= cu
->objfile
;
6564 struct attribute
*attr
;
6565 struct fnfieldlist
*flp
;
6567 struct fn_field
*fnp
;
6569 struct nextfnfield
*new_fnfield
;
6570 struct type
*this_type
;
6572 if (cu
->language
== language_ada
)
6573 error (_("unexpected member function in Ada type"));
6575 /* Get name of member function. */
6576 fieldname
= dwarf2_name (die
, cu
);
6577 if (fieldname
== NULL
)
6580 /* Look up member function name in fieldlist. */
6581 for (i
= 0; i
< fip
->nfnfields
; i
++)
6583 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6587 /* Create new list element if necessary. */
6588 if (i
< fip
->nfnfields
)
6589 flp
= &fip
->fnfieldlists
[i
];
6592 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6594 fip
->fnfieldlists
= (struct fnfieldlist
*)
6595 xrealloc (fip
->fnfieldlists
,
6596 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6597 * sizeof (struct fnfieldlist
));
6598 if (fip
->nfnfields
== 0)
6599 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6601 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6602 flp
->name
= fieldname
;
6605 i
= fip
->nfnfields
++;
6608 /* Create a new member function field and chain it to the field list
6610 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6611 make_cleanup (xfree
, new_fnfield
);
6612 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6613 new_fnfield
->next
= flp
->head
;
6614 flp
->head
= new_fnfield
;
6617 /* Fill in the member function field info. */
6618 fnp
= &new_fnfield
->fnfield
;
6620 /* Delay processing of the physname until later. */
6621 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6623 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6628 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6629 fnp
->physname
= physname
? physname
: "";
6632 fnp
->type
= alloc_type (objfile
);
6633 this_type
= read_type_die (die
, cu
);
6634 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6636 int nparams
= TYPE_NFIELDS (this_type
);
6638 /* TYPE is the domain of this method, and THIS_TYPE is the type
6639 of the method itself (TYPE_CODE_METHOD). */
6640 smash_to_method_type (fnp
->type
, type
,
6641 TYPE_TARGET_TYPE (this_type
),
6642 TYPE_FIELDS (this_type
),
6643 TYPE_NFIELDS (this_type
),
6644 TYPE_VARARGS (this_type
));
6646 /* Handle static member functions.
6647 Dwarf2 has no clean way to discern C++ static and non-static
6648 member functions. G++ helps GDB by marking the first
6649 parameter for non-static member functions (which is the this
6650 pointer) as artificial. We obtain this information from
6651 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6652 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6653 fnp
->voffset
= VOFFSET_STATIC
;
6656 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6657 dwarf2_full_name (fieldname
, die
, cu
));
6659 /* Get fcontext from DW_AT_containing_type if present. */
6660 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6661 fnp
->fcontext
= die_containing_type (die
, cu
);
6663 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
6664 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6666 /* Get accessibility. */
6667 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6670 switch (DW_UNSND (attr
))
6672 case DW_ACCESS_private
:
6673 fnp
->is_private
= 1;
6675 case DW_ACCESS_protected
:
6676 fnp
->is_protected
= 1;
6681 /* Check for artificial methods. */
6682 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6683 if (attr
&& DW_UNSND (attr
) != 0)
6684 fnp
->is_artificial
= 1;
6686 /* Get index in virtual function table if it is a virtual member
6687 function. For older versions of GCC, this is an offset in the
6688 appropriate virtual table, as specified by DW_AT_containing_type.
6689 For everyone else, it is an expression to be evaluated relative
6690 to the object address. */
6692 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6695 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6697 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6699 /* Old-style GCC. */
6700 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6702 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6703 || (DW_BLOCK (attr
)->size
> 1
6704 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6705 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6707 struct dwarf_block blk
;
6710 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6712 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6713 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6714 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6715 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6716 dwarf2_complex_location_expr_complaint ();
6718 fnp
->voffset
/= cu
->header
.addr_size
;
6722 dwarf2_complex_location_expr_complaint ();
6725 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6727 else if (attr_form_is_section_offset (attr
))
6729 dwarf2_complex_location_expr_complaint ();
6733 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6739 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6740 if (attr
&& DW_UNSND (attr
))
6742 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6743 complaint (&symfile_complaints
,
6744 _("Member function \"%s\" (offset %d) is virtual "
6745 "but the vtable offset is not specified"),
6746 fieldname
, die
->offset
);
6747 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6748 TYPE_CPLUS_DYNAMIC (type
) = 1;
6753 /* Create the vector of member function fields, and attach it to the type. */
6756 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6757 struct dwarf2_cu
*cu
)
6759 struct fnfieldlist
*flp
;
6760 int total_length
= 0;
6763 if (cu
->language
== language_ada
)
6764 error (_("unexpected member functions in Ada type"));
6766 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6767 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6768 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6770 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6772 struct nextfnfield
*nfp
= flp
->head
;
6773 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6776 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6777 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6778 fn_flp
->fn_fields
= (struct fn_field
*)
6779 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6780 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6781 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6783 total_length
+= flp
->length
;
6786 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6787 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6790 /* Returns non-zero if NAME is the name of a vtable member in CU's
6791 language, zero otherwise. */
6793 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6795 static const char vptr
[] = "_vptr";
6796 static const char vtable
[] = "vtable";
6798 /* Look for the C++ and Java forms of the vtable. */
6799 if ((cu
->language
== language_java
6800 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6801 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6802 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6808 /* GCC outputs unnamed structures that are really pointers to member
6809 functions, with the ABI-specified layout. If TYPE describes
6810 such a structure, smash it into a member function type.
6812 GCC shouldn't do this; it should just output pointer to member DIEs.
6813 This is GCC PR debug/28767. */
6816 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6818 struct type
*pfn_type
, *domain_type
, *new_type
;
6820 /* Check for a structure with no name and two children. */
6821 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6824 /* Check for __pfn and __delta members. */
6825 if (TYPE_FIELD_NAME (type
, 0) == NULL
6826 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6827 || TYPE_FIELD_NAME (type
, 1) == NULL
6828 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6831 /* Find the type of the method. */
6832 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6833 if (pfn_type
== NULL
6834 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6835 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6838 /* Look for the "this" argument. */
6839 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6840 if (TYPE_NFIELDS (pfn_type
) == 0
6841 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6842 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6845 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6846 new_type
= alloc_type (objfile
);
6847 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6848 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6849 TYPE_VARARGS (pfn_type
));
6850 smash_to_methodptr_type (type
, new_type
);
6853 /* Called when we find the DIE that starts a structure or union scope
6854 (definition) to create a type for the structure or union. Fill in
6855 the type's name and general properties; the members will not be
6856 processed until process_structure_type.
6858 NOTE: we need to call these functions regardless of whether or not the
6859 DIE has a DW_AT_name attribute, since it might be an anonymous
6860 structure or union. This gets the type entered into our set of
6863 However, if the structure is incomplete (an opaque struct/union)
6864 then suppress creating a symbol table entry for it since gdb only
6865 wants to find the one with the complete definition. Note that if
6866 it is complete, we just call new_symbol, which does it's own
6867 checking about whether the struct/union is anonymous or not (and
6868 suppresses creating a symbol table entry itself). */
6870 static struct type
*
6871 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6873 struct objfile
*objfile
= cu
->objfile
;
6875 struct attribute
*attr
;
6878 /* If the definition of this type lives in .debug_types, read that type.
6879 Don't follow DW_AT_specification though, that will take us back up
6880 the chain and we want to go down. */
6881 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6884 struct dwarf2_cu
*type_cu
= cu
;
6885 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6887 /* We could just recurse on read_structure_type, but we need to call
6888 get_die_type to ensure only one type for this DIE is created.
6889 This is important, for example, because for c++ classes we need
6890 TYPE_NAME set which is only done by new_symbol. Blech. */
6891 type
= read_type_die (type_die
, type_cu
);
6893 /* TYPE_CU may not be the same as CU.
6894 Ensure TYPE is recorded in CU's type_hash table. */
6895 return set_die_type (die
, type
, cu
);
6898 type
= alloc_type (objfile
);
6899 INIT_CPLUS_SPECIFIC (type
);
6901 name
= dwarf2_name (die
, cu
);
6904 if (cu
->language
== language_cplus
6905 || cu
->language
== language_java
)
6907 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6909 /* dwarf2_full_name might have already finished building the DIE's
6910 type. If so, there is no need to continue. */
6911 if (get_die_type (die
, cu
) != NULL
)
6912 return get_die_type (die
, cu
);
6914 TYPE_TAG_NAME (type
) = full_name
;
6915 if (die
->tag
== DW_TAG_structure_type
6916 || die
->tag
== DW_TAG_class_type
)
6917 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6921 /* The name is already allocated along with this objfile, so
6922 we don't need to duplicate it for the type. */
6923 TYPE_TAG_NAME (type
) = (char *) name
;
6924 if (die
->tag
== DW_TAG_class_type
)
6925 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6929 if (die
->tag
== DW_TAG_structure_type
)
6931 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6933 else if (die
->tag
== DW_TAG_union_type
)
6935 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6939 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6942 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6943 TYPE_DECLARED_CLASS (type
) = 1;
6945 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6948 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6952 TYPE_LENGTH (type
) = 0;
6955 TYPE_STUB_SUPPORTED (type
) = 1;
6956 if (die_is_declaration (die
, cu
))
6957 TYPE_STUB (type
) = 1;
6958 else if (attr
== NULL
&& die
->child
== NULL
6959 && producer_is_realview (cu
->producer
))
6960 /* RealView does not output the required DW_AT_declaration
6961 on incomplete types. */
6962 TYPE_STUB (type
) = 1;
6964 /* We need to add the type field to the die immediately so we don't
6965 infinitely recurse when dealing with pointers to the structure
6966 type within the structure itself. */
6967 set_die_type (die
, type
, cu
);
6969 /* set_die_type should be already done. */
6970 set_descriptive_type (type
, die
, cu
);
6975 /* Finish creating a structure or union type, including filling in
6976 its members and creating a symbol for it. */
6979 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6981 struct objfile
*objfile
= cu
->objfile
;
6982 struct die_info
*child_die
= die
->child
;
6985 type
= get_die_type (die
, cu
);
6987 type
= read_structure_type (die
, cu
);
6989 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6991 struct field_info fi
;
6992 struct die_info
*child_die
;
6993 VEC (symbolp
) *template_args
= NULL
;
6994 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6996 memset (&fi
, 0, sizeof (struct field_info
));
6998 child_die
= die
->child
;
7000 while (child_die
&& child_die
->tag
)
7002 if (child_die
->tag
== DW_TAG_member
7003 || child_die
->tag
== DW_TAG_variable
)
7005 /* NOTE: carlton/2002-11-05: A C++ static data member
7006 should be a DW_TAG_member that is a declaration, but
7007 all versions of G++ as of this writing (so through at
7008 least 3.2.1) incorrectly generate DW_TAG_variable
7009 tags for them instead. */
7010 dwarf2_add_field (&fi
, child_die
, cu
);
7012 else if (child_die
->tag
== DW_TAG_subprogram
)
7014 /* C++ member function. */
7015 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
7017 else if (child_die
->tag
== DW_TAG_inheritance
)
7019 /* C++ base class field. */
7020 dwarf2_add_field (&fi
, child_die
, cu
);
7022 else if (child_die
->tag
== DW_TAG_typedef
)
7023 dwarf2_add_typedef (&fi
, child_die
, cu
);
7024 else if (child_die
->tag
== DW_TAG_template_type_param
7025 || child_die
->tag
== DW_TAG_template_value_param
)
7027 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7030 VEC_safe_push (symbolp
, template_args
, arg
);
7033 child_die
= sibling_die (child_die
);
7036 /* Attach template arguments to type. */
7037 if (! VEC_empty (symbolp
, template_args
))
7039 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7040 TYPE_N_TEMPLATE_ARGUMENTS (type
)
7041 = VEC_length (symbolp
, template_args
);
7042 TYPE_TEMPLATE_ARGUMENTS (type
)
7043 = obstack_alloc (&objfile
->objfile_obstack
,
7044 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7045 * sizeof (struct symbol
*)));
7046 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
7047 VEC_address (symbolp
, template_args
),
7048 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7049 * sizeof (struct symbol
*)));
7050 VEC_free (symbolp
, template_args
);
7053 /* Attach fields and member functions to the type. */
7055 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
7058 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
7060 /* Get the type which refers to the base class (possibly this
7061 class itself) which contains the vtable pointer for the current
7062 class from the DW_AT_containing_type attribute. This use of
7063 DW_AT_containing_type is a GNU extension. */
7065 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7067 struct type
*t
= die_containing_type (die
, cu
);
7069 TYPE_VPTR_BASETYPE (type
) = t
;
7074 /* Our own class provides vtbl ptr. */
7075 for (i
= TYPE_NFIELDS (t
) - 1;
7076 i
>= TYPE_N_BASECLASSES (t
);
7079 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
7081 if (is_vtable_name (fieldname
, cu
))
7083 TYPE_VPTR_FIELDNO (type
) = i
;
7088 /* Complain if virtual function table field not found. */
7089 if (i
< TYPE_N_BASECLASSES (t
))
7090 complaint (&symfile_complaints
,
7091 _("virtual function table pointer "
7092 "not found when defining class '%s'"),
7093 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
7098 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
7101 else if (cu
->producer
7102 && strncmp (cu
->producer
,
7103 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7105 /* The IBM XLC compiler does not provide direct indication
7106 of the containing type, but the vtable pointer is
7107 always named __vfp. */
7111 for (i
= TYPE_NFIELDS (type
) - 1;
7112 i
>= TYPE_N_BASECLASSES (type
);
7115 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
7117 TYPE_VPTR_FIELDNO (type
) = i
;
7118 TYPE_VPTR_BASETYPE (type
) = type
;
7125 /* Copy fi.typedef_field_list linked list elements content into the
7126 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7127 if (fi
.typedef_field_list
)
7129 int i
= fi
.typedef_field_list_count
;
7131 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7132 TYPE_TYPEDEF_FIELD_ARRAY (type
)
7133 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
7134 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
7136 /* Reverse the list order to keep the debug info elements order. */
7139 struct typedef_field
*dest
, *src
;
7141 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
7142 src
= &fi
.typedef_field_list
->field
;
7143 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
7148 do_cleanups (back_to
);
7151 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
7153 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7154 snapshots) has been known to create a die giving a declaration
7155 for a class that has, as a child, a die giving a definition for a
7156 nested class. So we have to process our children even if the
7157 current die is a declaration. Normally, of course, a declaration
7158 won't have any children at all. */
7160 while (child_die
!= NULL
&& child_die
->tag
)
7162 if (child_die
->tag
== DW_TAG_member
7163 || child_die
->tag
== DW_TAG_variable
7164 || child_die
->tag
== DW_TAG_inheritance
7165 || child_die
->tag
== DW_TAG_template_value_param
7166 || child_die
->tag
== DW_TAG_template_type_param
)
7171 process_die (child_die
, cu
);
7173 child_die
= sibling_die (child_die
);
7176 /* Do not consider external references. According to the DWARF standard,
7177 these DIEs are identified by the fact that they have no byte_size
7178 attribute, and a declaration attribute. */
7179 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7180 || !die_is_declaration (die
, cu
))
7181 new_symbol (die
, type
, cu
);
7184 /* Given a DW_AT_enumeration_type die, set its type. We do not
7185 complete the type's fields yet, or create any symbols. */
7187 static struct type
*
7188 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7190 struct objfile
*objfile
= cu
->objfile
;
7192 struct attribute
*attr
;
7195 /* If the definition of this type lives in .debug_types, read that type.
7196 Don't follow DW_AT_specification though, that will take us back up
7197 the chain and we want to go down. */
7198 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7201 struct dwarf2_cu
*type_cu
= cu
;
7202 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7204 type
= read_type_die (type_die
, type_cu
);
7206 /* TYPE_CU may not be the same as CU.
7207 Ensure TYPE is recorded in CU's type_hash table. */
7208 return set_die_type (die
, type
, cu
);
7211 type
= alloc_type (objfile
);
7213 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7214 name
= dwarf2_full_name (NULL
, die
, cu
);
7216 TYPE_TAG_NAME (type
) = (char *) name
;
7218 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7221 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7225 TYPE_LENGTH (type
) = 0;
7228 /* The enumeration DIE can be incomplete. In Ada, any type can be
7229 declared as private in the package spec, and then defined only
7230 inside the package body. Such types are known as Taft Amendment
7231 Types. When another package uses such a type, an incomplete DIE
7232 may be generated by the compiler. */
7233 if (die_is_declaration (die
, cu
))
7234 TYPE_STUB (type
) = 1;
7236 return set_die_type (die
, type
, cu
);
7239 /* Given a pointer to a die which begins an enumeration, process all
7240 the dies that define the members of the enumeration, and create the
7241 symbol for the enumeration type.
7243 NOTE: We reverse the order of the element list. */
7246 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7248 struct type
*this_type
;
7250 this_type
= get_die_type (die
, cu
);
7251 if (this_type
== NULL
)
7252 this_type
= read_enumeration_type (die
, cu
);
7254 if (die
->child
!= NULL
)
7256 struct die_info
*child_die
;
7258 struct field
*fields
= NULL
;
7260 int unsigned_enum
= 1;
7263 child_die
= die
->child
;
7264 while (child_die
&& child_die
->tag
)
7266 if (child_die
->tag
!= DW_TAG_enumerator
)
7268 process_die (child_die
, cu
);
7272 name
= dwarf2_name (child_die
, cu
);
7275 sym
= new_symbol (child_die
, this_type
, cu
);
7276 if (SYMBOL_VALUE (sym
) < 0)
7279 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7281 fields
= (struct field
*)
7283 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7284 * sizeof (struct field
));
7287 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7288 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7289 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7290 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7296 child_die
= sibling_die (child_die
);
7301 TYPE_NFIELDS (this_type
) = num_fields
;
7302 TYPE_FIELDS (this_type
) = (struct field
*)
7303 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7304 memcpy (TYPE_FIELDS (this_type
), fields
,
7305 sizeof (struct field
) * num_fields
);
7309 TYPE_UNSIGNED (this_type
) = 1;
7312 new_symbol (die
, this_type
, cu
);
7315 /* Extract all information from a DW_TAG_array_type DIE and put it in
7316 the DIE's type field. For now, this only handles one dimensional
7319 static struct type
*
7320 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7322 struct objfile
*objfile
= cu
->objfile
;
7323 struct die_info
*child_die
;
7325 struct type
*element_type
, *range_type
, *index_type
;
7326 struct type
**range_types
= NULL
;
7327 struct attribute
*attr
;
7329 struct cleanup
*back_to
;
7332 element_type
= die_type (die
, cu
);
7334 /* The die_type call above may have already set the type for this DIE. */
7335 type
= get_die_type (die
, cu
);
7339 /* Irix 6.2 native cc creates array types without children for
7340 arrays with unspecified length. */
7341 if (die
->child
== NULL
)
7343 index_type
= objfile_type (objfile
)->builtin_int
;
7344 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7345 type
= create_array_type (NULL
, element_type
, range_type
);
7346 return set_die_type (die
, type
, cu
);
7349 back_to
= make_cleanup (null_cleanup
, NULL
);
7350 child_die
= die
->child
;
7351 while (child_die
&& child_die
->tag
)
7353 if (child_die
->tag
== DW_TAG_subrange_type
)
7355 struct type
*child_type
= read_type_die (child_die
, cu
);
7357 if (child_type
!= NULL
)
7359 /* The range type was succesfully read. Save it for the
7360 array type creation. */
7361 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7363 range_types
= (struct type
**)
7364 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7365 * sizeof (struct type
*));
7367 make_cleanup (free_current_contents
, &range_types
);
7369 range_types
[ndim
++] = child_type
;
7372 child_die
= sibling_die (child_die
);
7375 /* Dwarf2 dimensions are output from left to right, create the
7376 necessary array types in backwards order. */
7378 type
= element_type
;
7380 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7385 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7390 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7393 /* Understand Dwarf2 support for vector types (like they occur on
7394 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7395 array type. This is not part of the Dwarf2/3 standard yet, but a
7396 custom vendor extension. The main difference between a regular
7397 array and the vector variant is that vectors are passed by value
7399 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7401 make_vector_type (type
);
7403 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
7404 implementation may choose to implement triple vectors using this
7406 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7409 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
7410 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7412 complaint (&symfile_complaints
,
7413 _("DW_AT_byte_size for array type smaller "
7414 "than the total size of elements"));
7417 name
= dwarf2_name (die
, cu
);
7419 TYPE_NAME (type
) = name
;
7421 /* Install the type in the die. */
7422 set_die_type (die
, type
, cu
);
7424 /* set_die_type should be already done. */
7425 set_descriptive_type (type
, die
, cu
);
7427 do_cleanups (back_to
);
7432 static enum dwarf_array_dim_ordering
7433 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7435 struct attribute
*attr
;
7437 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7439 if (attr
) return DW_SND (attr
);
7441 /* GNU F77 is a special case, as at 08/2004 array type info is the
7442 opposite order to the dwarf2 specification, but data is still
7443 laid out as per normal fortran.
7445 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7446 version checking. */
7448 if (cu
->language
== language_fortran
7449 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7451 return DW_ORD_row_major
;
7454 switch (cu
->language_defn
->la_array_ordering
)
7456 case array_column_major
:
7457 return DW_ORD_col_major
;
7458 case array_row_major
:
7460 return DW_ORD_row_major
;
7464 /* Extract all information from a DW_TAG_set_type DIE and put it in
7465 the DIE's type field. */
7467 static struct type
*
7468 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7470 struct type
*domain_type
, *set_type
;
7471 struct attribute
*attr
;
7473 domain_type
= die_type (die
, cu
);
7475 /* The die_type call above may have already set the type for this DIE. */
7476 set_type
= get_die_type (die
, cu
);
7480 set_type
= create_set_type (NULL
, domain_type
);
7482 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7484 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7486 return set_die_type (die
, set_type
, cu
);
7489 /* First cut: install each common block member as a global variable. */
7492 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7494 struct die_info
*child_die
;
7495 struct attribute
*attr
;
7497 CORE_ADDR base
= (CORE_ADDR
) 0;
7499 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7502 /* Support the .debug_loc offsets. */
7503 if (attr_form_is_block (attr
))
7505 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7507 else if (attr_form_is_section_offset (attr
))
7509 dwarf2_complex_location_expr_complaint ();
7513 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7514 "common block member");
7517 if (die
->child
!= NULL
)
7519 child_die
= die
->child
;
7520 while (child_die
&& child_die
->tag
)
7522 sym
= new_symbol (child_die
, NULL
, cu
);
7523 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7524 if (sym
!= NULL
&& attr
!= NULL
)
7526 CORE_ADDR byte_offset
= 0;
7528 if (attr_form_is_section_offset (attr
))
7529 dwarf2_complex_location_expr_complaint ();
7530 else if (attr_form_is_constant (attr
))
7531 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7532 else if (attr_form_is_block (attr
))
7533 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7535 dwarf2_complex_location_expr_complaint ();
7537 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7538 add_symbol_to_list (sym
, &global_symbols
);
7540 child_die
= sibling_die (child_die
);
7545 /* Create a type for a C++ namespace. */
7547 static struct type
*
7548 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7550 struct objfile
*objfile
= cu
->objfile
;
7551 const char *previous_prefix
, *name
;
7555 /* For extensions, reuse the type of the original namespace. */
7556 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7558 struct die_info
*ext_die
;
7559 struct dwarf2_cu
*ext_cu
= cu
;
7561 ext_die
= dwarf2_extension (die
, &ext_cu
);
7562 type
= read_type_die (ext_die
, ext_cu
);
7564 /* EXT_CU may not be the same as CU.
7565 Ensure TYPE is recorded in CU's type_hash table. */
7566 return set_die_type (die
, type
, cu
);
7569 name
= namespace_name (die
, &is_anonymous
, cu
);
7571 /* Now build the name of the current namespace. */
7573 previous_prefix
= determine_prefix (die
, cu
);
7574 if (previous_prefix
[0] != '\0')
7575 name
= typename_concat (&objfile
->objfile_obstack
,
7576 previous_prefix
, name
, 0, cu
);
7578 /* Create the type. */
7579 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7581 TYPE_NAME (type
) = (char *) name
;
7582 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7584 return set_die_type (die
, type
, cu
);
7587 /* Read a C++ namespace. */
7590 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7592 struct objfile
*objfile
= cu
->objfile
;
7596 /* Add a symbol associated to this if we haven't seen the namespace
7597 before. Also, add a using directive if it's an anonymous
7600 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7604 type
= read_type_die (die
, cu
);
7605 new_symbol (die
, type
, cu
);
7607 name
= namespace_name (die
, &is_anonymous
, cu
);
7610 const char *previous_prefix
= determine_prefix (die
, cu
);
7612 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7613 NULL
, &objfile
->objfile_obstack
);
7617 if (die
->child
!= NULL
)
7619 struct die_info
*child_die
= die
->child
;
7621 while (child_die
&& child_die
->tag
)
7623 process_die (child_die
, cu
);
7624 child_die
= sibling_die (child_die
);
7629 /* Read a Fortran module as type. This DIE can be only a declaration used for
7630 imported module. Still we need that type as local Fortran "use ... only"
7631 declaration imports depend on the created type in determine_prefix. */
7633 static struct type
*
7634 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7636 struct objfile
*objfile
= cu
->objfile
;
7640 module_name
= dwarf2_name (die
, cu
);
7642 complaint (&symfile_complaints
,
7643 _("DW_TAG_module has no name, offset 0x%x"),
7645 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7647 /* determine_prefix uses TYPE_TAG_NAME. */
7648 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7650 return set_die_type (die
, type
, cu
);
7653 /* Read a Fortran module. */
7656 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7658 struct die_info
*child_die
= die
->child
;
7660 while (child_die
&& child_die
->tag
)
7662 process_die (child_die
, cu
);
7663 child_die
= sibling_die (child_die
);
7667 /* Return the name of the namespace represented by DIE. Set
7668 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7672 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7674 struct die_info
*current_die
;
7675 const char *name
= NULL
;
7677 /* Loop through the extensions until we find a name. */
7679 for (current_die
= die
;
7680 current_die
!= NULL
;
7681 current_die
= dwarf2_extension (die
, &cu
))
7683 name
= dwarf2_name (current_die
, cu
);
7688 /* Is it an anonymous namespace? */
7690 *is_anonymous
= (name
== NULL
);
7692 name
= "(anonymous namespace)";
7697 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7698 the user defined type vector. */
7700 static struct type
*
7701 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7703 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7704 struct comp_unit_head
*cu_header
= &cu
->header
;
7706 struct attribute
*attr_byte_size
;
7707 struct attribute
*attr_address_class
;
7708 int byte_size
, addr_class
;
7709 struct type
*target_type
;
7711 target_type
= die_type (die
, cu
);
7713 /* The die_type call above may have already set the type for this DIE. */
7714 type
= get_die_type (die
, cu
);
7718 type
= lookup_pointer_type (target_type
);
7720 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7722 byte_size
= DW_UNSND (attr_byte_size
);
7724 byte_size
= cu_header
->addr_size
;
7726 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7727 if (attr_address_class
)
7728 addr_class
= DW_UNSND (attr_address_class
);
7730 addr_class
= DW_ADDR_none
;
7732 /* If the pointer size or address class is different than the
7733 default, create a type variant marked as such and set the
7734 length accordingly. */
7735 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7737 if (gdbarch_address_class_type_flags_p (gdbarch
))
7741 type_flags
= gdbarch_address_class_type_flags
7742 (gdbarch
, byte_size
, addr_class
);
7743 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7745 type
= make_type_with_address_space (type
, type_flags
);
7747 else if (TYPE_LENGTH (type
) != byte_size
)
7749 complaint (&symfile_complaints
,
7750 _("invalid pointer size %d"), byte_size
);
7754 /* Should we also complain about unhandled address classes? */
7758 TYPE_LENGTH (type
) = byte_size
;
7759 return set_die_type (die
, type
, cu
);
7762 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7763 the user defined type vector. */
7765 static struct type
*
7766 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7769 struct type
*to_type
;
7770 struct type
*domain
;
7772 to_type
= die_type (die
, cu
);
7773 domain
= die_containing_type (die
, cu
);
7775 /* The calls above may have already set the type for this DIE. */
7776 type
= get_die_type (die
, cu
);
7780 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7781 type
= lookup_methodptr_type (to_type
);
7783 type
= lookup_memberptr_type (to_type
, domain
);
7785 return set_die_type (die
, type
, cu
);
7788 /* Extract all information from a DW_TAG_reference_type DIE and add to
7789 the user defined type vector. */
7791 static struct type
*
7792 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7794 struct comp_unit_head
*cu_header
= &cu
->header
;
7795 struct type
*type
, *target_type
;
7796 struct attribute
*attr
;
7798 target_type
= die_type (die
, cu
);
7800 /* The die_type call above may have already set the type for this DIE. */
7801 type
= get_die_type (die
, cu
);
7805 type
= lookup_reference_type (target_type
);
7806 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7809 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7813 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7815 return set_die_type (die
, type
, cu
);
7818 static struct type
*
7819 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7821 struct type
*base_type
, *cv_type
;
7823 base_type
= die_type (die
, cu
);
7825 /* The die_type call above may have already set the type for this DIE. */
7826 cv_type
= get_die_type (die
, cu
);
7830 /* In case the const qualifier is applied to an array type, the element type
7831 is so qualified, not the array type (section 6.7.3 of C99). */
7832 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
7834 struct type
*el_type
, *inner_array
;
7836 base_type
= copy_type (base_type
);
7837 inner_array
= base_type
;
7839 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
7841 TYPE_TARGET_TYPE (inner_array
) =
7842 copy_type (TYPE_TARGET_TYPE (inner_array
));
7843 inner_array
= TYPE_TARGET_TYPE (inner_array
);
7846 el_type
= TYPE_TARGET_TYPE (inner_array
);
7847 TYPE_TARGET_TYPE (inner_array
) =
7848 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
7850 return set_die_type (die
, base_type
, cu
);
7853 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7854 return set_die_type (die
, cv_type
, cu
);
7857 static struct type
*
7858 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7860 struct type
*base_type
, *cv_type
;
7862 base_type
= die_type (die
, cu
);
7864 /* The die_type call above may have already set the type for this DIE. */
7865 cv_type
= get_die_type (die
, cu
);
7869 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7870 return set_die_type (die
, cv_type
, cu
);
7873 /* Extract all information from a DW_TAG_string_type DIE and add to
7874 the user defined type vector. It isn't really a user defined type,
7875 but it behaves like one, with other DIE's using an AT_user_def_type
7876 attribute to reference it. */
7878 static struct type
*
7879 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7881 struct objfile
*objfile
= cu
->objfile
;
7882 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7883 struct type
*type
, *range_type
, *index_type
, *char_type
;
7884 struct attribute
*attr
;
7885 unsigned int length
;
7887 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7890 length
= DW_UNSND (attr
);
7894 /* Check for the DW_AT_byte_size attribute. */
7895 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7898 length
= DW_UNSND (attr
);
7906 index_type
= objfile_type (objfile
)->builtin_int
;
7907 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7908 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7909 type
= create_string_type (NULL
, char_type
, range_type
);
7911 return set_die_type (die
, type
, cu
);
7914 /* Handle DIES due to C code like:
7918 int (*funcp)(int a, long l);
7922 ('funcp' generates a DW_TAG_subroutine_type DIE). */
7924 static struct type
*
7925 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7927 struct type
*type
; /* Type that this function returns. */
7928 struct type
*ftype
; /* Function that returns above type. */
7929 struct attribute
*attr
;
7931 type
= die_type (die
, cu
);
7933 /* The die_type call above may have already set the type for this DIE. */
7934 ftype
= get_die_type (die
, cu
);
7938 ftype
= lookup_function_type (type
);
7940 /* All functions in C++, Pascal and Java have prototypes. */
7941 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7942 if ((attr
&& (DW_UNSND (attr
) != 0))
7943 || cu
->language
== language_cplus
7944 || cu
->language
== language_java
7945 || cu
->language
== language_pascal
)
7946 TYPE_PROTOTYPED (ftype
) = 1;
7947 else if (producer_is_realview (cu
->producer
))
7948 /* RealView does not emit DW_AT_prototyped. We can not
7949 distinguish prototyped and unprototyped functions; default to
7950 prototyped, since that is more common in modern code (and
7951 RealView warns about unprototyped functions). */
7952 TYPE_PROTOTYPED (ftype
) = 1;
7954 /* Store the calling convention in the type if it's available in
7955 the subroutine die. Otherwise set the calling convention to
7956 the default value DW_CC_normal. */
7957 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7959 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
7960 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
7961 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
7963 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
7965 /* We need to add the subroutine type to the die immediately so
7966 we don't infinitely recurse when dealing with parameters
7967 declared as the same subroutine type. */
7968 set_die_type (die
, ftype
, cu
);
7970 if (die
->child
!= NULL
)
7972 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7973 struct die_info
*child_die
;
7974 int nparams
, iparams
;
7976 /* Count the number of parameters.
7977 FIXME: GDB currently ignores vararg functions, but knows about
7978 vararg member functions. */
7980 child_die
= die
->child
;
7981 while (child_die
&& child_die
->tag
)
7983 if (child_die
->tag
== DW_TAG_formal_parameter
)
7985 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7986 TYPE_VARARGS (ftype
) = 1;
7987 child_die
= sibling_die (child_die
);
7990 /* Allocate storage for parameters and fill them in. */
7991 TYPE_NFIELDS (ftype
) = nparams
;
7992 TYPE_FIELDS (ftype
) = (struct field
*)
7993 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7995 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7996 even if we error out during the parameters reading below. */
7997 for (iparams
= 0; iparams
< nparams
; iparams
++)
7998 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
8001 child_die
= die
->child
;
8002 while (child_die
&& child_die
->tag
)
8004 if (child_die
->tag
== DW_TAG_formal_parameter
)
8006 struct type
*arg_type
;
8008 /* DWARF version 2 has no clean way to discern C++
8009 static and non-static member functions. G++ helps
8010 GDB by marking the first parameter for non-static
8011 member functions (which is the this pointer) as
8012 artificial. We pass this information to
8013 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
8015 DWARF version 3 added DW_AT_object_pointer, which GCC
8016 4.5 does not yet generate. */
8017 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
8019 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
8022 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
8024 /* GCC/43521: In java, the formal parameter
8025 "this" is sometimes not marked with DW_AT_artificial. */
8026 if (cu
->language
== language_java
)
8028 const char *name
= dwarf2_name (child_die
, cu
);
8030 if (name
&& !strcmp (name
, "this"))
8031 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
8034 arg_type
= die_type (child_die
, cu
);
8036 /* RealView does not mark THIS as const, which the testsuite
8037 expects. GCC marks THIS as const in method definitions,
8038 but not in the class specifications (GCC PR 43053). */
8039 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
8040 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
8043 struct dwarf2_cu
*arg_cu
= cu
;
8044 const char *name
= dwarf2_name (child_die
, cu
);
8046 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
8049 /* If the compiler emits this, use it. */
8050 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
8053 else if (name
&& strcmp (name
, "this") == 0)
8054 /* Function definitions will have the argument names. */
8056 else if (name
== NULL
&& iparams
== 0)
8057 /* Declarations may not have the names, so like
8058 elsewhere in GDB, assume an artificial first
8059 argument is "this". */
8063 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
8067 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
8070 child_die
= sibling_die (child_die
);
8077 static struct type
*
8078 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
8080 struct objfile
*objfile
= cu
->objfile
;
8081 const char *name
= NULL
;
8082 struct type
*this_type
;
8084 name
= dwarf2_full_name (NULL
, die
, cu
);
8085 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
8086 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
8087 TYPE_NAME (this_type
) = (char *) name
;
8088 set_die_type (die
, this_type
, cu
);
8089 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
8093 /* Find a representation of a given base type and install
8094 it in the TYPE field of the die. */
8096 static struct type
*
8097 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8099 struct objfile
*objfile
= cu
->objfile
;
8101 struct attribute
*attr
;
8102 int encoding
= 0, size
= 0;
8104 enum type_code code
= TYPE_CODE_INT
;
8106 struct type
*target_type
= NULL
;
8108 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
8111 encoding
= DW_UNSND (attr
);
8113 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8116 size
= DW_UNSND (attr
);
8118 name
= dwarf2_name (die
, cu
);
8121 complaint (&symfile_complaints
,
8122 _("DW_AT_name missing from DW_TAG_base_type"));
8127 case DW_ATE_address
:
8128 /* Turn DW_ATE_address into a void * pointer. */
8129 code
= TYPE_CODE_PTR
;
8130 type_flags
|= TYPE_FLAG_UNSIGNED
;
8131 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
8133 case DW_ATE_boolean
:
8134 code
= TYPE_CODE_BOOL
;
8135 type_flags
|= TYPE_FLAG_UNSIGNED
;
8137 case DW_ATE_complex_float
:
8138 code
= TYPE_CODE_COMPLEX
;
8139 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
8141 case DW_ATE_decimal_float
:
8142 code
= TYPE_CODE_DECFLOAT
;
8145 code
= TYPE_CODE_FLT
;
8149 case DW_ATE_unsigned
:
8150 type_flags
|= TYPE_FLAG_UNSIGNED
;
8152 case DW_ATE_signed_char
:
8153 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8154 || cu
->language
== language_pascal
)
8155 code
= TYPE_CODE_CHAR
;
8157 case DW_ATE_unsigned_char
:
8158 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8159 || cu
->language
== language_pascal
)
8160 code
= TYPE_CODE_CHAR
;
8161 type_flags
|= TYPE_FLAG_UNSIGNED
;
8164 /* We just treat this as an integer and then recognize the
8165 type by name elsewhere. */
8169 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
8170 dwarf_type_encoding_name (encoding
));
8174 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
8175 TYPE_NAME (type
) = name
;
8176 TYPE_TARGET_TYPE (type
) = target_type
;
8178 if (name
&& strcmp (name
, "char") == 0)
8179 TYPE_NOSIGN (type
) = 1;
8181 return set_die_type (die
, type
, cu
);
8184 /* Read the given DW_AT_subrange DIE. */
8186 static struct type
*
8187 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8189 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
8190 struct type
*base_type
;
8191 struct type
*range_type
;
8192 struct attribute
*attr
;
8196 LONGEST negative_mask
;
8198 base_type
= die_type (die
, cu
);
8199 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8200 check_typedef (base_type
);
8202 /* The die_type call above may have already set the type for this DIE. */
8203 range_type
= get_die_type (die
, cu
);
8207 if (cu
->language
== language_fortran
)
8209 /* FORTRAN implies a lower bound of 1, if not given. */
8213 /* FIXME: For variable sized arrays either of these could be
8214 a variable rather than a constant value. We'll allow it,
8215 but we don't know how to handle it. */
8216 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
8218 low
= dwarf2_get_attr_constant_value (attr
, 0);
8220 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8223 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
8225 /* GCC encodes arrays with unspecified or dynamic length
8226 with a DW_FORM_block1 attribute or a reference attribute.
8227 FIXME: GDB does not yet know how to handle dynamic
8228 arrays properly, treat them as arrays with unspecified
8231 FIXME: jimb/2003-09-22: GDB does not really know
8232 how to handle arrays of unspecified length
8233 either; we just represent them as zero-length
8234 arrays. Choose an appropriate upper bound given
8235 the lower bound we've computed above. */
8239 high
= dwarf2_get_attr_constant_value (attr
, 1);
8243 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8246 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8247 high
= low
+ count
- 1;
8251 /* Unspecified array length. */
8256 /* Dwarf-2 specifications explicitly allows to create subrange types
8257 without specifying a base type.
8258 In that case, the base type must be set to the type of
8259 the lower bound, upper bound or count, in that order, if any of these
8260 three attributes references an object that has a type.
8261 If no base type is found, the Dwarf-2 specifications say that
8262 a signed integer type of size equal to the size of an address should
8264 For the following C code: `extern char gdb_int [];'
8265 GCC produces an empty range DIE.
8266 FIXME: muller/2010-05-28: Possible references to object for low bound,
8267 high bound or count are not yet handled by this code. */
8268 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8270 struct objfile
*objfile
= cu
->objfile
;
8271 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8272 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8273 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8275 /* Test "int", "long int", and "long long int" objfile types,
8276 and select the first one having a size above or equal to the
8277 architecture address size. */
8278 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8279 base_type
= int_type
;
8282 int_type
= objfile_type (objfile
)->builtin_long
;
8283 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8284 base_type
= int_type
;
8287 int_type
= objfile_type (objfile
)->builtin_long_long
;
8288 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8289 base_type
= int_type
;
8295 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8296 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8297 low
|= negative_mask
;
8298 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8299 high
|= negative_mask
;
8301 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8303 /* Mark arrays with dynamic length at least as an array of unspecified
8304 length. GDB could check the boundary but before it gets implemented at
8305 least allow accessing the array elements. */
8306 if (attr
&& attr
->form
== DW_FORM_block1
)
8307 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8309 /* Ada expects an empty array on no boundary attributes. */
8310 if (attr
== NULL
&& cu
->language
!= language_ada
)
8311 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8313 name
= dwarf2_name (die
, cu
);
8315 TYPE_NAME (range_type
) = name
;
8317 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8319 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8321 set_die_type (die
, range_type
, cu
);
8323 /* set_die_type should be already done. */
8324 set_descriptive_type (range_type
, die
, cu
);
8329 static struct type
*
8330 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8334 /* For now, we only support the C meaning of an unspecified type: void. */
8336 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8337 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8339 return set_die_type (die
, type
, cu
);
8342 /* Trivial hash function for die_info: the hash value of a DIE
8343 is its offset in .debug_info for this objfile. */
8346 die_hash (const void *item
)
8348 const struct die_info
*die
= item
;
8353 /* Trivial comparison function for die_info structures: two DIEs
8354 are equal if they have the same offset. */
8357 die_eq (const void *item_lhs
, const void *item_rhs
)
8359 const struct die_info
*die_lhs
= item_lhs
;
8360 const struct die_info
*die_rhs
= item_rhs
;
8362 return die_lhs
->offset
== die_rhs
->offset
;
8365 /* Read a whole compilation unit into a linked list of dies. */
8367 static struct die_info
*
8368 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8370 struct die_reader_specs reader_specs
;
8371 int read_abbrevs
= 0;
8372 struct cleanup
*back_to
= NULL
;
8373 struct die_info
*die
;
8375 if (cu
->dwarf2_abbrevs
== NULL
)
8377 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8378 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8382 gdb_assert (cu
->die_hash
== NULL
);
8384 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8388 &cu
->comp_unit_obstack
,
8389 hashtab_obstack_allocate
,
8390 dummy_obstack_deallocate
);
8392 init_cu_die_reader (&reader_specs
, cu
);
8394 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8397 do_cleanups (back_to
);
8402 /* Main entry point for reading a DIE and all children.
8403 Read the DIE and dump it if requested. */
8405 static struct die_info
*
8406 read_die_and_children (const struct die_reader_specs
*reader
,
8408 gdb_byte
**new_info_ptr
,
8409 struct die_info
*parent
)
8411 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8412 new_info_ptr
, parent
);
8414 if (dwarf2_die_debug
)
8416 fprintf_unfiltered (gdb_stdlog
,
8417 "\nRead die from %s of %s:\n",
8418 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8420 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8422 : "unknown section",
8423 reader
->abfd
->filename
);
8424 dump_die (result
, dwarf2_die_debug
);
8430 /* Read a single die and all its descendents. Set the die's sibling
8431 field to NULL; set other fields in the die correctly, and set all
8432 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8433 location of the info_ptr after reading all of those dies. PARENT
8434 is the parent of the die in question. */
8436 static struct die_info
*
8437 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8439 gdb_byte
**new_info_ptr
,
8440 struct die_info
*parent
)
8442 struct die_info
*die
;
8446 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8449 *new_info_ptr
= cur_ptr
;
8452 store_in_ref_table (die
, reader
->cu
);
8455 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8459 *new_info_ptr
= cur_ptr
;
8462 die
->sibling
= NULL
;
8463 die
->parent
= parent
;
8467 /* Read a die, all of its descendents, and all of its siblings; set
8468 all of the fields of all of the dies correctly. Arguments are as
8469 in read_die_and_children. */
8471 static struct die_info
*
8472 read_die_and_siblings (const struct die_reader_specs
*reader
,
8474 gdb_byte
**new_info_ptr
,
8475 struct die_info
*parent
)
8477 struct die_info
*first_die
, *last_sibling
;
8481 first_die
= last_sibling
= NULL
;
8485 struct die_info
*die
8486 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8490 *new_info_ptr
= cur_ptr
;
8497 last_sibling
->sibling
= die
;
8503 /* Read the die from the .debug_info section buffer. Set DIEP to
8504 point to a newly allocated die with its information, except for its
8505 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8506 whether the die has children or not. */
8509 read_full_die (const struct die_reader_specs
*reader
,
8510 struct die_info
**diep
, gdb_byte
*info_ptr
,
8513 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8514 struct abbrev_info
*abbrev
;
8515 struct die_info
*die
;
8516 struct dwarf2_cu
*cu
= reader
->cu
;
8517 bfd
*abfd
= reader
->abfd
;
8519 offset
= info_ptr
- reader
->buffer
;
8520 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8521 info_ptr
+= bytes_read
;
8529 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8531 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8533 bfd_get_filename (abfd
));
8535 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8536 die
->offset
= offset
;
8537 die
->tag
= abbrev
->tag
;
8538 die
->abbrev
= abbrev_number
;
8540 die
->num_attrs
= abbrev
->num_attrs
;
8542 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8543 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8544 abfd
, info_ptr
, cu
);
8547 *has_children
= abbrev
->has_children
;
8551 /* In DWARF version 2, the description of the debugging information is
8552 stored in a separate .debug_abbrev section. Before we read any
8553 dies from a section we read in all abbreviations and install them
8554 in a hash table. This function also sets flags in CU describing
8555 the data found in the abbrev table. */
8558 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8560 struct comp_unit_head
*cu_header
= &cu
->header
;
8561 gdb_byte
*abbrev_ptr
;
8562 struct abbrev_info
*cur_abbrev
;
8563 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8564 unsigned int abbrev_form
, hash_number
;
8565 struct attr_abbrev
*cur_attrs
;
8566 unsigned int allocated_attrs
;
8568 /* Initialize dwarf2 abbrevs. */
8569 obstack_init (&cu
->abbrev_obstack
);
8570 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8572 * sizeof (struct abbrev_info
*)));
8573 memset (cu
->dwarf2_abbrevs
, 0,
8574 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8576 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8577 &dwarf2_per_objfile
->abbrev
);
8578 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8579 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8580 abbrev_ptr
+= bytes_read
;
8582 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8583 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8585 /* Loop until we reach an abbrev number of 0. */
8586 while (abbrev_number
)
8588 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8590 /* read in abbrev header */
8591 cur_abbrev
->number
= abbrev_number
;
8592 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8593 abbrev_ptr
+= bytes_read
;
8594 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8597 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8598 cu
->has_namespace_info
= 1;
8600 /* now read in declarations */
8601 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8602 abbrev_ptr
+= bytes_read
;
8603 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8604 abbrev_ptr
+= bytes_read
;
8607 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8609 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8611 = xrealloc (cur_attrs
, (allocated_attrs
8612 * sizeof (struct attr_abbrev
)));
8615 /* Record whether this compilation unit might have
8616 inter-compilation-unit references. If we don't know what form
8617 this attribute will have, then it might potentially be a
8618 DW_FORM_ref_addr, so we conservatively expect inter-CU
8621 if (abbrev_form
== DW_FORM_ref_addr
8622 || abbrev_form
== DW_FORM_indirect
)
8623 cu
->has_form_ref_addr
= 1;
8625 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8626 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8627 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8628 abbrev_ptr
+= bytes_read
;
8629 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8630 abbrev_ptr
+= bytes_read
;
8633 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8634 (cur_abbrev
->num_attrs
8635 * sizeof (struct attr_abbrev
)));
8636 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8637 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8639 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8640 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8641 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8643 /* Get next abbreviation.
8644 Under Irix6 the abbreviations for a compilation unit are not
8645 always properly terminated with an abbrev number of 0.
8646 Exit loop if we encounter an abbreviation which we have
8647 already read (which means we are about to read the abbreviations
8648 for the next compile unit) or if the end of the abbreviation
8649 table is reached. */
8650 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8651 >= dwarf2_per_objfile
->abbrev
.size
)
8653 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8654 abbrev_ptr
+= bytes_read
;
8655 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8662 /* Release the memory used by the abbrev table for a compilation unit. */
8665 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8667 struct dwarf2_cu
*cu
= ptr_to_cu
;
8669 obstack_free (&cu
->abbrev_obstack
, NULL
);
8670 cu
->dwarf2_abbrevs
= NULL
;
8673 /* Lookup an abbrev_info structure in the abbrev hash table. */
8675 static struct abbrev_info
*
8676 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8678 unsigned int hash_number
;
8679 struct abbrev_info
*abbrev
;
8681 hash_number
= number
% ABBREV_HASH_SIZE
;
8682 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8686 if (abbrev
->number
== number
)
8689 abbrev
= abbrev
->next
;
8694 /* Returns nonzero if TAG represents a type that we might generate a partial
8698 is_type_tag_for_partial (int tag
)
8703 /* Some types that would be reasonable to generate partial symbols for,
8704 that we don't at present. */
8705 case DW_TAG_array_type
:
8706 case DW_TAG_file_type
:
8707 case DW_TAG_ptr_to_member_type
:
8708 case DW_TAG_set_type
:
8709 case DW_TAG_string_type
:
8710 case DW_TAG_subroutine_type
:
8712 case DW_TAG_base_type
:
8713 case DW_TAG_class_type
:
8714 case DW_TAG_interface_type
:
8715 case DW_TAG_enumeration_type
:
8716 case DW_TAG_structure_type
:
8717 case DW_TAG_subrange_type
:
8718 case DW_TAG_typedef
:
8719 case DW_TAG_union_type
:
8726 /* Load all DIEs that are interesting for partial symbols into memory. */
8728 static struct partial_die_info
*
8729 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8730 int building_psymtab
, struct dwarf2_cu
*cu
)
8732 struct partial_die_info
*part_die
;
8733 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8734 struct abbrev_info
*abbrev
;
8735 unsigned int bytes_read
;
8736 unsigned int load_all
= 0;
8738 int nesting_level
= 1;
8743 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8747 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8751 &cu
->comp_unit_obstack
,
8752 hashtab_obstack_allocate
,
8753 dummy_obstack_deallocate
);
8755 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8756 sizeof (struct partial_die_info
));
8760 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8762 /* A NULL abbrev means the end of a series of children. */
8765 if (--nesting_level
== 0)
8767 /* PART_DIE was probably the last thing allocated on the
8768 comp_unit_obstack, so we could call obstack_free
8769 here. We don't do that because the waste is small,
8770 and will be cleaned up when we're done with this
8771 compilation unit. This way, we're also more robust
8772 against other users of the comp_unit_obstack. */
8775 info_ptr
+= bytes_read
;
8776 last_die
= parent_die
;
8777 parent_die
= parent_die
->die_parent
;
8781 /* Check for template arguments. We never save these; if
8782 they're seen, we just mark the parent, and go on our way. */
8783 if (parent_die
!= NULL
8784 && cu
->language
== language_cplus
8785 && (abbrev
->tag
== DW_TAG_template_type_param
8786 || abbrev
->tag
== DW_TAG_template_value_param
))
8788 parent_die
->has_template_arguments
= 1;
8792 /* We don't need a partial DIE for the template argument. */
8793 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8799 /* We only recurse into subprograms looking for template arguments.
8800 Skip their other children. */
8802 && cu
->language
== language_cplus
8803 && parent_die
!= NULL
8804 && parent_die
->tag
== DW_TAG_subprogram
)
8806 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8810 /* Check whether this DIE is interesting enough to save. Normally
8811 we would not be interested in members here, but there may be
8812 later variables referencing them via DW_AT_specification (for
8815 && !is_type_tag_for_partial (abbrev
->tag
)
8816 && abbrev
->tag
!= DW_TAG_constant
8817 && abbrev
->tag
!= DW_TAG_enumerator
8818 && abbrev
->tag
!= DW_TAG_subprogram
8819 && abbrev
->tag
!= DW_TAG_lexical_block
8820 && abbrev
->tag
!= DW_TAG_variable
8821 && abbrev
->tag
!= DW_TAG_namespace
8822 && abbrev
->tag
!= DW_TAG_module
8823 && abbrev
->tag
!= DW_TAG_member
)
8825 /* Otherwise we skip to the next sibling, if any. */
8826 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8830 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8831 buffer
, info_ptr
, cu
);
8833 /* This two-pass algorithm for processing partial symbols has a
8834 high cost in cache pressure. Thus, handle some simple cases
8835 here which cover the majority of C partial symbols. DIEs
8836 which neither have specification tags in them, nor could have
8837 specification tags elsewhere pointing at them, can simply be
8838 processed and discarded.
8840 This segment is also optional; scan_partial_symbols and
8841 add_partial_symbol will handle these DIEs if we chain
8842 them in normally. When compilers which do not emit large
8843 quantities of duplicate debug information are more common,
8844 this code can probably be removed. */
8846 /* Any complete simple types at the top level (pretty much all
8847 of them, for a language without namespaces), can be processed
8849 if (parent_die
== NULL
8850 && part_die
->has_specification
== 0
8851 && part_die
->is_declaration
== 0
8852 && (part_die
->tag
== DW_TAG_typedef
8853 || part_die
->tag
== DW_TAG_base_type
8854 || part_die
->tag
== DW_TAG_subrange_type
))
8856 if (building_psymtab
&& part_die
->name
!= NULL
)
8857 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8858 VAR_DOMAIN
, LOC_TYPEDEF
,
8859 &cu
->objfile
->static_psymbols
,
8860 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8861 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8865 /* If we're at the second level, and we're an enumerator, and
8866 our parent has no specification (meaning possibly lives in a
8867 namespace elsewhere), then we can add the partial symbol now
8868 instead of queueing it. */
8869 if (part_die
->tag
== DW_TAG_enumerator
8870 && parent_die
!= NULL
8871 && parent_die
->die_parent
== NULL
8872 && parent_die
->tag
== DW_TAG_enumeration_type
8873 && parent_die
->has_specification
== 0)
8875 if (part_die
->name
== NULL
)
8876 complaint (&symfile_complaints
,
8877 _("malformed enumerator DIE ignored"));
8878 else if (building_psymtab
)
8879 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8880 VAR_DOMAIN
, LOC_CONST
,
8881 (cu
->language
== language_cplus
8882 || cu
->language
== language_java
)
8883 ? &cu
->objfile
->global_psymbols
8884 : &cu
->objfile
->static_psymbols
,
8885 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8887 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8891 /* We'll save this DIE so link it in. */
8892 part_die
->die_parent
= parent_die
;
8893 part_die
->die_sibling
= NULL
;
8894 part_die
->die_child
= NULL
;
8896 if (last_die
&& last_die
== parent_die
)
8897 last_die
->die_child
= part_die
;
8899 last_die
->die_sibling
= part_die
;
8901 last_die
= part_die
;
8903 if (first_die
== NULL
)
8904 first_die
= part_die
;
8906 /* Maybe add the DIE to the hash table. Not all DIEs that we
8907 find interesting need to be in the hash table, because we
8908 also have the parent/sibling/child chains; only those that we
8909 might refer to by offset later during partial symbol reading.
8911 For now this means things that might have be the target of a
8912 DW_AT_specification, DW_AT_abstract_origin, or
8913 DW_AT_extension. DW_AT_extension will refer only to
8914 namespaces; DW_AT_abstract_origin refers to functions (and
8915 many things under the function DIE, but we do not recurse
8916 into function DIEs during partial symbol reading) and
8917 possibly variables as well; DW_AT_specification refers to
8918 declarations. Declarations ought to have the DW_AT_declaration
8919 flag. It happens that GCC forgets to put it in sometimes, but
8920 only for functions, not for types.
8922 Adding more things than necessary to the hash table is harmless
8923 except for the performance cost. Adding too few will result in
8924 wasted time in find_partial_die, when we reread the compilation
8925 unit with load_all_dies set. */
8928 || abbrev
->tag
== DW_TAG_constant
8929 || abbrev
->tag
== DW_TAG_subprogram
8930 || abbrev
->tag
== DW_TAG_variable
8931 || abbrev
->tag
== DW_TAG_namespace
8932 || part_die
->is_declaration
)
8936 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8937 part_die
->offset
, INSERT
);
8941 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8942 sizeof (struct partial_die_info
));
8944 /* For some DIEs we want to follow their children (if any). For C
8945 we have no reason to follow the children of structures; for other
8946 languages we have to, so that we can get at method physnames
8947 to infer fully qualified class names, for DW_AT_specification,
8948 and for C++ template arguments. For C++, we also look one level
8949 inside functions to find template arguments (if the name of the
8950 function does not already contain the template arguments).
8952 For Ada, we need to scan the children of subprograms and lexical
8953 blocks as well because Ada allows the definition of nested
8954 entities that could be interesting for the debugger, such as
8955 nested subprograms for instance. */
8956 if (last_die
->has_children
8958 || last_die
->tag
== DW_TAG_namespace
8959 || last_die
->tag
== DW_TAG_module
8960 || last_die
->tag
== DW_TAG_enumeration_type
8961 || (cu
->language
== language_cplus
8962 && last_die
->tag
== DW_TAG_subprogram
8963 && (last_die
->name
== NULL
8964 || strchr (last_die
->name
, '<') == NULL
))
8965 || (cu
->language
!= language_c
8966 && (last_die
->tag
== DW_TAG_class_type
8967 || last_die
->tag
== DW_TAG_interface_type
8968 || last_die
->tag
== DW_TAG_structure_type
8969 || last_die
->tag
== DW_TAG_union_type
))
8970 || (cu
->language
== language_ada
8971 && (last_die
->tag
== DW_TAG_subprogram
8972 || last_die
->tag
== DW_TAG_lexical_block
))))
8975 parent_die
= last_die
;
8979 /* Otherwise we skip to the next sibling, if any. */
8980 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8982 /* Back to the top, do it again. */
8986 /* Read a minimal amount of information into the minimal die structure. */
8989 read_partial_die (struct partial_die_info
*part_die
,
8990 struct abbrev_info
*abbrev
,
8991 unsigned int abbrev_len
, bfd
*abfd
,
8992 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8993 struct dwarf2_cu
*cu
)
8996 struct attribute attr
;
8997 int has_low_pc_attr
= 0;
8998 int has_high_pc_attr
= 0;
9000 memset (part_die
, 0, sizeof (struct partial_die_info
));
9002 part_die
->offset
= info_ptr
- buffer
;
9004 info_ptr
+= abbrev_len
;
9009 part_die
->tag
= abbrev
->tag
;
9010 part_die
->has_children
= abbrev
->has_children
;
9012 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9014 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
9016 /* Store the data if it is of an attribute we want to keep in a
9017 partial symbol table. */
9021 switch (part_die
->tag
)
9023 case DW_TAG_compile_unit
:
9024 case DW_TAG_type_unit
:
9025 /* Compilation units have a DW_AT_name that is a filename, not
9026 a source language identifier. */
9027 case DW_TAG_enumeration_type
:
9028 case DW_TAG_enumerator
:
9029 /* These tags always have simple identifiers already; no need
9030 to canonicalize them. */
9031 part_die
->name
= DW_STRING (&attr
);
9035 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
9036 &cu
->objfile
->objfile_obstack
);
9040 case DW_AT_linkage_name
:
9041 case DW_AT_MIPS_linkage_name
:
9042 /* Note that both forms of linkage name might appear. We
9043 assume they will be the same, and we only store the last
9045 if (cu
->language
== language_ada
)
9046 part_die
->name
= DW_STRING (&attr
);
9047 part_die
->linkage_name
= DW_STRING (&attr
);
9050 has_low_pc_attr
= 1;
9051 part_die
->lowpc
= DW_ADDR (&attr
);
9054 has_high_pc_attr
= 1;
9055 part_die
->highpc
= DW_ADDR (&attr
);
9057 case DW_AT_location
:
9058 /* Support the .debug_loc offsets. */
9059 if (attr_form_is_block (&attr
))
9061 part_die
->locdesc
= DW_BLOCK (&attr
);
9063 else if (attr_form_is_section_offset (&attr
))
9065 dwarf2_complex_location_expr_complaint ();
9069 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9070 "partial symbol information");
9073 case DW_AT_external
:
9074 part_die
->is_external
= DW_UNSND (&attr
);
9076 case DW_AT_declaration
:
9077 part_die
->is_declaration
= DW_UNSND (&attr
);
9080 part_die
->has_type
= 1;
9082 case DW_AT_abstract_origin
:
9083 case DW_AT_specification
:
9084 case DW_AT_extension
:
9085 part_die
->has_specification
= 1;
9086 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
9089 /* Ignore absolute siblings, they might point outside of
9090 the current compile unit. */
9091 if (attr
.form
== DW_FORM_ref_addr
)
9092 complaint (&symfile_complaints
,
9093 _("ignoring absolute DW_AT_sibling"));
9095 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
9097 case DW_AT_byte_size
:
9098 part_die
->has_byte_size
= 1;
9100 case DW_AT_calling_convention
:
9101 /* DWARF doesn't provide a way to identify a program's source-level
9102 entry point. DW_AT_calling_convention attributes are only meant
9103 to describe functions' calling conventions.
9105 However, because it's a necessary piece of information in
9106 Fortran, and because DW_CC_program is the only piece of debugging
9107 information whose definition refers to a 'main program' at all,
9108 several compilers have begun marking Fortran main programs with
9109 DW_CC_program --- even when those functions use the standard
9110 calling conventions.
9112 So until DWARF specifies a way to provide this information and
9113 compilers pick up the new representation, we'll support this
9115 if (DW_UNSND (&attr
) == DW_CC_program
9116 && cu
->language
== language_fortran
)
9118 set_main_name (part_die
->name
);
9120 /* As this DIE has a static linkage the name would be difficult
9121 to look up later. */
9122 language_of_main
= language_fortran
;
9130 /* When using the GNU linker, .gnu.linkonce. sections are used to
9131 eliminate duplicate copies of functions and vtables and such.
9132 The linker will arbitrarily choose one and discard the others.
9133 The AT_*_pc values for such functions refer to local labels in
9134 these sections. If the section from that file was discarded, the
9135 labels are not in the output, so the relocs get a value of 0.
9136 If this is a discarded function, mark the pc bounds as invalid,
9137 so that GDB will ignore it. */
9138 if (has_low_pc_attr
&& has_high_pc_attr
9139 && part_die
->lowpc
< part_die
->highpc
9140 && (part_die
->lowpc
!= 0
9141 || dwarf2_per_objfile
->has_section_at_zero
))
9142 part_die
->has_pc_info
= 1;
9147 /* Find a cached partial DIE at OFFSET in CU. */
9149 static struct partial_die_info
*
9150 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
9152 struct partial_die_info
*lookup_die
= NULL
;
9153 struct partial_die_info part_die
;
9155 part_die
.offset
= offset
;
9156 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
9161 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9162 except in the case of .debug_types DIEs which do not reference
9163 outside their CU (they do however referencing other types via
9166 static struct partial_die_info
*
9167 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
9169 struct dwarf2_per_cu_data
*per_cu
= NULL
;
9170 struct partial_die_info
*pd
= NULL
;
9172 if (cu
->per_cu
->from_debug_types
)
9174 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9180 if (offset_in_cu_p (&cu
->header
, offset
))
9182 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9187 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
9189 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
9190 load_partial_comp_unit (per_cu
, cu
->objfile
);
9192 per_cu
->cu
->last_used
= 0;
9193 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9195 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
9197 struct cleanup
*back_to
;
9198 struct partial_die_info comp_unit_die
;
9199 struct abbrev_info
*abbrev
;
9200 unsigned int bytes_read
;
9203 per_cu
->load_all_dies
= 1;
9205 /* Re-read the DIEs. */
9206 back_to
= make_cleanup (null_cleanup
, 0);
9207 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
9209 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
9210 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
9212 info_ptr
= (dwarf2_per_objfile
->info
.buffer
9213 + per_cu
->cu
->header
.offset
9214 + per_cu
->cu
->header
.first_die_offset
);
9215 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
9216 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
9217 per_cu
->cu
->objfile
->obfd
,
9218 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9220 if (comp_unit_die
.has_children
)
9221 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
9222 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9224 do_cleanups (back_to
);
9226 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9232 internal_error (__FILE__
, __LINE__
,
9233 _("could not find partial DIE 0x%x "
9234 "in cache [from module %s]\n"),
9235 offset
, bfd_get_filename (cu
->objfile
->obfd
));
9239 /* See if we can figure out if the class lives in a namespace. We do
9240 this by looking for a member function; its demangled name will
9241 contain namespace info, if there is any. */
9244 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
9245 struct dwarf2_cu
*cu
)
9247 /* NOTE: carlton/2003-10-07: Getting the info this way changes
9248 what template types look like, because the demangler
9249 frequently doesn't give the same name as the debug info. We
9250 could fix this by only using the demangled name to get the
9251 prefix (but see comment in read_structure_type). */
9253 struct partial_die_info
*real_pdi
;
9254 struct partial_die_info
*child_pdi
;
9256 /* If this DIE (this DIE's specification, if any) has a parent, then
9257 we should not do this. We'll prepend the parent's fully qualified
9258 name when we create the partial symbol. */
9260 real_pdi
= struct_pdi
;
9261 while (real_pdi
->has_specification
)
9262 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
9264 if (real_pdi
->die_parent
!= NULL
)
9267 for (child_pdi
= struct_pdi
->die_child
;
9269 child_pdi
= child_pdi
->die_sibling
)
9271 if (child_pdi
->tag
== DW_TAG_subprogram
9272 && child_pdi
->linkage_name
!= NULL
)
9274 char *actual_class_name
9275 = language_class_name_from_physname (cu
->language_defn
,
9276 child_pdi
->linkage_name
);
9277 if (actual_class_name
!= NULL
)
9280 = obsavestring (actual_class_name
,
9281 strlen (actual_class_name
),
9282 &cu
->objfile
->objfile_obstack
);
9283 xfree (actual_class_name
);
9290 /* Adjust PART_DIE before generating a symbol for it. This function
9291 may set the is_external flag or change the DIE's name. */
9294 fixup_partial_die (struct partial_die_info
*part_die
,
9295 struct dwarf2_cu
*cu
)
9297 /* Once we've fixed up a die, there's no point in doing so again.
9298 This also avoids a memory leak if we were to call
9299 guess_partial_die_structure_name multiple times. */
9300 if (part_die
->fixup_called
)
9303 /* If we found a reference attribute and the DIE has no name, try
9304 to find a name in the referred to DIE. */
9306 if (part_die
->name
== NULL
&& part_die
->has_specification
)
9308 struct partial_die_info
*spec_die
;
9310 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
9312 fixup_partial_die (spec_die
, cu
);
9316 part_die
->name
= spec_die
->name
;
9318 /* Copy DW_AT_external attribute if it is set. */
9319 if (spec_die
->is_external
)
9320 part_die
->is_external
= spec_die
->is_external
;
9324 /* Set default names for some unnamed DIEs. */
9326 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9327 part_die
->name
= "(anonymous namespace)";
9329 /* If there is no parent die to provide a namespace, and there are
9330 children, see if we can determine the namespace from their linkage
9332 NOTE: We need to do this even if cu->has_namespace_info != 0.
9333 gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
9334 if (cu
->language
== language_cplus
9335 && dwarf2_per_objfile
->types
.asection
!= NULL
9336 && part_die
->die_parent
== NULL
9337 && part_die
->has_children
9338 && (part_die
->tag
== DW_TAG_class_type
9339 || part_die
->tag
== DW_TAG_structure_type
9340 || part_die
->tag
== DW_TAG_union_type
))
9341 guess_partial_die_structure_name (part_die
, cu
);
9343 part_die
->fixup_called
= 1;
9346 /* Read an attribute value described by an attribute form. */
9349 read_attribute_value (struct attribute
*attr
, unsigned form
,
9350 bfd
*abfd
, gdb_byte
*info_ptr
,
9351 struct dwarf2_cu
*cu
)
9353 struct comp_unit_head
*cu_header
= &cu
->header
;
9354 unsigned int bytes_read
;
9355 struct dwarf_block
*blk
;
9360 case DW_FORM_ref_addr
:
9361 if (cu
->header
.version
== 2)
9362 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9364 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
,
9365 &cu
->header
, &bytes_read
);
9366 info_ptr
+= bytes_read
;
9369 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9370 info_ptr
+= bytes_read
;
9372 case DW_FORM_block2
:
9373 blk
= dwarf_alloc_block (cu
);
9374 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9376 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9377 info_ptr
+= blk
->size
;
9378 DW_BLOCK (attr
) = blk
;
9380 case DW_FORM_block4
:
9381 blk
= dwarf_alloc_block (cu
);
9382 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9384 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9385 info_ptr
+= blk
->size
;
9386 DW_BLOCK (attr
) = blk
;
9389 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9393 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9397 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9400 case DW_FORM_sec_offset
:
9401 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9402 info_ptr
+= bytes_read
;
9404 case DW_FORM_string
:
9405 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9406 DW_STRING_IS_CANONICAL (attr
) = 0;
9407 info_ptr
+= bytes_read
;
9410 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9412 DW_STRING_IS_CANONICAL (attr
) = 0;
9413 info_ptr
+= bytes_read
;
9415 case DW_FORM_exprloc
:
9417 blk
= dwarf_alloc_block (cu
);
9418 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9419 info_ptr
+= bytes_read
;
9420 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9421 info_ptr
+= blk
->size
;
9422 DW_BLOCK (attr
) = blk
;
9424 case DW_FORM_block1
:
9425 blk
= dwarf_alloc_block (cu
);
9426 blk
->size
= read_1_byte (abfd
, info_ptr
);
9428 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9429 info_ptr
+= blk
->size
;
9430 DW_BLOCK (attr
) = blk
;
9433 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9437 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9440 case DW_FORM_flag_present
:
9441 DW_UNSND (attr
) = 1;
9444 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9445 info_ptr
+= bytes_read
;
9448 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9449 info_ptr
+= bytes_read
;
9452 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9456 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9460 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9464 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9468 /* Convert the signature to something we can record in DW_UNSND
9470 NOTE: This is NULL if the type wasn't found. */
9471 DW_SIGNATURED_TYPE (attr
) =
9472 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9475 case DW_FORM_ref_udata
:
9476 DW_ADDR (attr
) = (cu
->header
.offset
9477 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9478 info_ptr
+= bytes_read
;
9480 case DW_FORM_indirect
:
9481 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9482 info_ptr
+= bytes_read
;
9483 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9486 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9487 dwarf_form_name (form
),
9488 bfd_get_filename (abfd
));
9491 /* We have seen instances where the compiler tried to emit a byte
9492 size attribute of -1 which ended up being encoded as an unsigned
9493 0xffffffff. Although 0xffffffff is technically a valid size value,
9494 an object of this size seems pretty unlikely so we can relatively
9495 safely treat these cases as if the size attribute was invalid and
9496 treat them as zero by default. */
9497 if (attr
->name
== DW_AT_byte_size
9498 && form
== DW_FORM_data4
9499 && DW_UNSND (attr
) >= 0xffffffff)
9502 (&symfile_complaints
,
9503 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9504 hex_string (DW_UNSND (attr
)));
9505 DW_UNSND (attr
) = 0;
9511 /* Read an attribute described by an abbreviated attribute. */
9514 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9515 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9517 attr
->name
= abbrev
->name
;
9518 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9521 /* Read dwarf information from a buffer. */
9524 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9526 return bfd_get_8 (abfd
, buf
);
9530 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9532 return bfd_get_signed_8 (abfd
, buf
);
9536 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9538 return bfd_get_16 (abfd
, buf
);
9542 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9544 return bfd_get_signed_16 (abfd
, buf
);
9548 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9550 return bfd_get_32 (abfd
, buf
);
9554 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9556 return bfd_get_signed_32 (abfd
, buf
);
9560 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9562 return bfd_get_64 (abfd
, buf
);
9566 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9567 unsigned int *bytes_read
)
9569 struct comp_unit_head
*cu_header
= &cu
->header
;
9570 CORE_ADDR retval
= 0;
9572 if (cu_header
->signed_addr_p
)
9574 switch (cu_header
->addr_size
)
9577 retval
= bfd_get_signed_16 (abfd
, buf
);
9580 retval
= bfd_get_signed_32 (abfd
, buf
);
9583 retval
= bfd_get_signed_64 (abfd
, buf
);
9586 internal_error (__FILE__
, __LINE__
,
9587 _("read_address: bad switch, signed [in module %s]"),
9588 bfd_get_filename (abfd
));
9593 switch (cu_header
->addr_size
)
9596 retval
= bfd_get_16 (abfd
, buf
);
9599 retval
= bfd_get_32 (abfd
, buf
);
9602 retval
= bfd_get_64 (abfd
, buf
);
9605 internal_error (__FILE__
, __LINE__
,
9606 _("read_address: bad switch, "
9607 "unsigned [in module %s]"),
9608 bfd_get_filename (abfd
));
9612 *bytes_read
= cu_header
->addr_size
;
9616 /* Read the initial length from a section. The (draft) DWARF 3
9617 specification allows the initial length to take up either 4 bytes
9618 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9619 bytes describe the length and all offsets will be 8 bytes in length
9622 An older, non-standard 64-bit format is also handled by this
9623 function. The older format in question stores the initial length
9624 as an 8-byte quantity without an escape value. Lengths greater
9625 than 2^32 aren't very common which means that the initial 4 bytes
9626 is almost always zero. Since a length value of zero doesn't make
9627 sense for the 32-bit format, this initial zero can be considered to
9628 be an escape value which indicates the presence of the older 64-bit
9629 format. As written, the code can't detect (old format) lengths
9630 greater than 4GB. If it becomes necessary to handle lengths
9631 somewhat larger than 4GB, we could allow other small values (such
9632 as the non-sensical values of 1, 2, and 3) to also be used as
9633 escape values indicating the presence of the old format.
9635 The value returned via bytes_read should be used to increment the
9636 relevant pointer after calling read_initial_length().
9638 [ Note: read_initial_length() and read_offset() are based on the
9639 document entitled "DWARF Debugging Information Format", revision
9640 3, draft 8, dated November 19, 2001. This document was obtained
9643 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9645 This document is only a draft and is subject to change. (So beware.)
9647 Details regarding the older, non-standard 64-bit format were
9648 determined empirically by examining 64-bit ELF files produced by
9649 the SGI toolchain on an IRIX 6.5 machine.
9651 - Kevin, July 16, 2002
9655 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9657 LONGEST length
= bfd_get_32 (abfd
, buf
);
9659 if (length
== 0xffffffff)
9661 length
= bfd_get_64 (abfd
, buf
+ 4);
9664 else if (length
== 0)
9666 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9667 length
= bfd_get_64 (abfd
, buf
);
9678 /* Cover function for read_initial_length.
9679 Returns the length of the object at BUF, and stores the size of the
9680 initial length in *BYTES_READ and stores the size that offsets will be in
9682 If the initial length size is not equivalent to that specified in
9683 CU_HEADER then issue a complaint.
9684 This is useful when reading non-comp-unit headers. */
9687 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9688 const struct comp_unit_head
*cu_header
,
9689 unsigned int *bytes_read
,
9690 unsigned int *offset_size
)
9692 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9694 gdb_assert (cu_header
->initial_length_size
== 4
9695 || cu_header
->initial_length_size
== 8
9696 || cu_header
->initial_length_size
== 12);
9698 if (cu_header
->initial_length_size
!= *bytes_read
)
9699 complaint (&symfile_complaints
,
9700 _("intermixed 32-bit and 64-bit DWARF sections"));
9702 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9706 /* Read an offset from the data stream. The size of the offset is
9707 given by cu_header->offset_size. */
9710 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9711 unsigned int *bytes_read
)
9713 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9715 *bytes_read
= cu_header
->offset_size
;
9719 /* Read an offset from the data stream. */
9722 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9726 switch (offset_size
)
9729 retval
= bfd_get_32 (abfd
, buf
);
9732 retval
= bfd_get_64 (abfd
, buf
);
9735 internal_error (__FILE__
, __LINE__
,
9736 _("read_offset_1: bad switch [in module %s]"),
9737 bfd_get_filename (abfd
));
9744 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9746 /* If the size of a host char is 8 bits, we can return a pointer
9747 to the buffer, otherwise we have to copy the data to a buffer
9748 allocated on the temporary obstack. */
9749 gdb_assert (HOST_CHAR_BIT
== 8);
9754 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9756 /* If the size of a host char is 8 bits, we can return a pointer
9757 to the string, otherwise we have to copy the string to a buffer
9758 allocated on the temporary obstack. */
9759 gdb_assert (HOST_CHAR_BIT
== 8);
9762 *bytes_read_ptr
= 1;
9765 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9766 return (char *) buf
;
9770 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9771 const struct comp_unit_head
*cu_header
,
9772 unsigned int *bytes_read_ptr
)
9774 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9776 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9777 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9779 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9780 bfd_get_filename (abfd
));
9783 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9785 error (_("DW_FORM_strp pointing outside of "
9786 ".debug_str section [in module %s]"),
9787 bfd_get_filename (abfd
));
9790 gdb_assert (HOST_CHAR_BIT
== 8);
9791 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9793 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9796 static unsigned long
9797 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9799 unsigned long result
;
9800 unsigned int num_read
;
9810 byte
= bfd_get_8 (abfd
, buf
);
9813 result
|= ((unsigned long)(byte
& 127) << shift
);
9814 if ((byte
& 128) == 0)
9820 *bytes_read_ptr
= num_read
;
9825 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9828 int i
, shift
, num_read
;
9837 byte
= bfd_get_8 (abfd
, buf
);
9840 result
|= ((long)(byte
& 127) << shift
);
9842 if ((byte
& 128) == 0)
9847 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9848 result
|= -(((long)1) << shift
);
9849 *bytes_read_ptr
= num_read
;
9853 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9856 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9862 byte
= bfd_get_8 (abfd
, buf
);
9864 if ((byte
& 128) == 0)
9870 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9877 cu
->language
= language_c
;
9879 case DW_LANG_C_plus_plus
:
9880 cu
->language
= language_cplus
;
9883 cu
->language
= language_d
;
9885 case DW_LANG_Fortran77
:
9886 case DW_LANG_Fortran90
:
9887 case DW_LANG_Fortran95
:
9888 cu
->language
= language_fortran
;
9890 case DW_LANG_Mips_Assembler
:
9891 cu
->language
= language_asm
;
9894 cu
->language
= language_java
;
9898 cu
->language
= language_ada
;
9900 case DW_LANG_Modula2
:
9901 cu
->language
= language_m2
;
9903 case DW_LANG_Pascal83
:
9904 cu
->language
= language_pascal
;
9907 cu
->language
= language_objc
;
9909 case DW_LANG_Cobol74
:
9910 case DW_LANG_Cobol85
:
9912 cu
->language
= language_minimal
;
9915 cu
->language_defn
= language_def (cu
->language
);
9918 /* Return the named attribute or NULL if not there. */
9920 static struct attribute
*
9921 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9924 struct attribute
*spec
= NULL
;
9926 for (i
= 0; i
< die
->num_attrs
; ++i
)
9928 if (die
->attrs
[i
].name
== name
)
9929 return &die
->attrs
[i
];
9930 if (die
->attrs
[i
].name
== DW_AT_specification
9931 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9932 spec
= &die
->attrs
[i
];
9937 die
= follow_die_ref (die
, spec
, &cu
);
9938 return dwarf2_attr (die
, name
, cu
);
9944 /* Return the named attribute or NULL if not there,
9945 but do not follow DW_AT_specification, etc.
9946 This is for use in contexts where we're reading .debug_types dies.
9947 Following DW_AT_specification, DW_AT_abstract_origin will take us
9948 back up the chain, and we want to go down. */
9950 static struct attribute
*
9951 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9952 struct dwarf2_cu
*cu
)
9956 for (i
= 0; i
< die
->num_attrs
; ++i
)
9957 if (die
->attrs
[i
].name
== name
)
9958 return &die
->attrs
[i
];
9963 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9964 and holds a non-zero value. This function should only be used for
9965 DW_FORM_flag or DW_FORM_flag_present attributes. */
9968 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9970 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9972 return (attr
&& DW_UNSND (attr
));
9976 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9978 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9979 which value is non-zero. However, we have to be careful with
9980 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9981 (via dwarf2_flag_true_p) follows this attribute. So we may
9982 end up accidently finding a declaration attribute that belongs
9983 to a different DIE referenced by the specification attribute,
9984 even though the given DIE does not have a declaration attribute. */
9985 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9986 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9989 /* Return the die giving the specification for DIE, if there is
9990 one. *SPEC_CU is the CU containing DIE on input, and the CU
9991 containing the return value on output. If there is no
9992 specification, but there is an abstract origin, that is
9995 static struct die_info
*
9996 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9998 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
10001 if (spec_attr
== NULL
)
10002 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
10004 if (spec_attr
== NULL
)
10007 return follow_die_ref (die
, spec_attr
, spec_cu
);
10010 /* Free the line_header structure *LH, and any arrays and strings it
10012 NOTE: This is also used as a "cleanup" function. */
10015 free_line_header (struct line_header
*lh
)
10017 if (lh
->standard_opcode_lengths
)
10018 xfree (lh
->standard_opcode_lengths
);
10020 /* Remember that all the lh->file_names[i].name pointers are
10021 pointers into debug_line_buffer, and don't need to be freed. */
10022 if (lh
->file_names
)
10023 xfree (lh
->file_names
);
10025 /* Similarly for the include directory names. */
10026 if (lh
->include_dirs
)
10027 xfree (lh
->include_dirs
);
10032 /* Add an entry to LH's include directory table. */
10035 add_include_dir (struct line_header
*lh
, char *include_dir
)
10037 /* Grow the array if necessary. */
10038 if (lh
->include_dirs_size
== 0)
10040 lh
->include_dirs_size
= 1; /* for testing */
10041 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
10042 * sizeof (*lh
->include_dirs
));
10044 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
10046 lh
->include_dirs_size
*= 2;
10047 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
10048 (lh
->include_dirs_size
10049 * sizeof (*lh
->include_dirs
)));
10052 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
10055 /* Add an entry to LH's file name table. */
10058 add_file_name (struct line_header
*lh
,
10060 unsigned int dir_index
,
10061 unsigned int mod_time
,
10062 unsigned int length
)
10064 struct file_entry
*fe
;
10066 /* Grow the array if necessary. */
10067 if (lh
->file_names_size
== 0)
10069 lh
->file_names_size
= 1; /* for testing */
10070 lh
->file_names
= xmalloc (lh
->file_names_size
10071 * sizeof (*lh
->file_names
));
10073 else if (lh
->num_file_names
>= lh
->file_names_size
)
10075 lh
->file_names_size
*= 2;
10076 lh
->file_names
= xrealloc (lh
->file_names
,
10077 (lh
->file_names_size
10078 * sizeof (*lh
->file_names
)));
10081 fe
= &lh
->file_names
[lh
->num_file_names
++];
10083 fe
->dir_index
= dir_index
;
10084 fe
->mod_time
= mod_time
;
10085 fe
->length
= length
;
10086 fe
->included_p
= 0;
10090 /* Read the statement program header starting at OFFSET in
10091 .debug_line, according to the endianness of ABFD. Return a pointer
10092 to a struct line_header, allocated using xmalloc.
10094 NOTE: the strings in the include directory and file name tables of
10095 the returned object point into debug_line_buffer, and must not be
10098 static struct line_header
*
10099 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
10100 struct dwarf2_cu
*cu
)
10102 struct cleanup
*back_to
;
10103 struct line_header
*lh
;
10104 gdb_byte
*line_ptr
;
10105 unsigned int bytes_read
, offset_size
;
10107 char *cur_dir
, *cur_file
;
10109 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
10110 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
10112 complaint (&symfile_complaints
, _("missing .debug_line section"));
10116 /* Make sure that at least there's room for the total_length field.
10117 That could be 12 bytes long, but we're just going to fudge that. */
10118 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
10120 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10124 lh
= xmalloc (sizeof (*lh
));
10125 memset (lh
, 0, sizeof (*lh
));
10126 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
10129 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
10131 /* Read in the header. */
10133 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
10134 &bytes_read
, &offset_size
);
10135 line_ptr
+= bytes_read
;
10136 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
10137 + dwarf2_per_objfile
->line
.size
))
10139 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10142 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
10143 lh
->version
= read_2_bytes (abfd
, line_ptr
);
10145 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
10146 line_ptr
+= offset_size
;
10147 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
10149 if (lh
->version
>= 4)
10151 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
10155 lh
->maximum_ops_per_instruction
= 1;
10157 if (lh
->maximum_ops_per_instruction
== 0)
10159 lh
->maximum_ops_per_instruction
= 1;
10160 complaint (&symfile_complaints
,
10161 _("invalid maximum_ops_per_instruction "
10162 "in `.debug_line' section"));
10165 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
10167 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
10169 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
10171 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
10173 lh
->standard_opcode_lengths
10174 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
10176 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
10177 for (i
= 1; i
< lh
->opcode_base
; ++i
)
10179 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
10183 /* Read directory table. */
10184 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10186 line_ptr
+= bytes_read
;
10187 add_include_dir (lh
, cur_dir
);
10189 line_ptr
+= bytes_read
;
10191 /* Read file name table. */
10192 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10194 unsigned int dir_index
, mod_time
, length
;
10196 line_ptr
+= bytes_read
;
10197 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10198 line_ptr
+= bytes_read
;
10199 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10200 line_ptr
+= bytes_read
;
10201 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10202 line_ptr
+= bytes_read
;
10204 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10206 line_ptr
+= bytes_read
;
10207 lh
->statement_program_start
= line_ptr
;
10209 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
10210 + dwarf2_per_objfile
->line
.size
))
10211 complaint (&symfile_complaints
,
10212 _("line number info header doesn't "
10213 "fit in `.debug_line' section"));
10215 discard_cleanups (back_to
);
10219 /* This function exists to work around a bug in certain compilers
10220 (particularly GCC 2.95), in which the first line number marker of a
10221 function does not show up until after the prologue, right before
10222 the second line number marker. This function shifts ADDRESS down
10223 to the beginning of the function if necessary, and is called on
10224 addresses passed to record_line. */
10227 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
10229 struct function_range
*fn
;
10231 /* Find the function_range containing address. */
10235 if (!cu
->cached_fn
)
10236 cu
->cached_fn
= cu
->first_fn
;
10238 fn
= cu
->cached_fn
;
10240 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10246 while (fn
&& fn
!= cu
->cached_fn
)
10247 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10257 if (address
!= fn
->lowpc
)
10258 complaint (&symfile_complaints
,
10259 _("misplaced first line number at 0x%lx for '%s'"),
10260 (unsigned long) address
, fn
->name
);
10265 /* Subroutine of dwarf_decode_lines to simplify it.
10266 Return the file name of the psymtab for included file FILE_INDEX
10267 in line header LH of PST.
10268 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10269 If space for the result is malloc'd, it will be freed by a cleanup.
10270 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
10273 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
10274 const struct partial_symtab
*pst
,
10275 const char *comp_dir
)
10277 const struct file_entry fe
= lh
->file_names
[file_index
];
10278 char *include_name
= fe
.name
;
10279 char *include_name_to_compare
= include_name
;
10280 char *dir_name
= NULL
;
10281 const char *pst_filename
;
10282 char *copied_name
= NULL
;
10286 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
10288 if (!IS_ABSOLUTE_PATH (include_name
)
10289 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
10291 /* Avoid creating a duplicate psymtab for PST.
10292 We do this by comparing INCLUDE_NAME and PST_FILENAME.
10293 Before we do the comparison, however, we need to account
10294 for DIR_NAME and COMP_DIR.
10295 First prepend dir_name (if non-NULL). If we still don't
10296 have an absolute path prepend comp_dir (if non-NULL).
10297 However, the directory we record in the include-file's
10298 psymtab does not contain COMP_DIR (to match the
10299 corresponding symtab(s)).
10304 bash$ gcc -g ./hello.c
10305 include_name = "hello.c"
10307 DW_AT_comp_dir = comp_dir = "/tmp"
10308 DW_AT_name = "./hello.c" */
10310 if (dir_name
!= NULL
)
10312 include_name
= concat (dir_name
, SLASH_STRING
,
10313 include_name
, (char *)NULL
);
10314 include_name_to_compare
= include_name
;
10315 make_cleanup (xfree
, include_name
);
10317 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
10319 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
10320 include_name
, (char *)NULL
);
10324 pst_filename
= pst
->filename
;
10325 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
10327 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
10328 pst_filename
, (char *)NULL
);
10329 pst_filename
= copied_name
;
10332 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
10334 if (include_name_to_compare
!= include_name
)
10335 xfree (include_name_to_compare
);
10336 if (copied_name
!= NULL
)
10337 xfree (copied_name
);
10341 return include_name
;
10344 /* Decode the Line Number Program (LNP) for the given line_header
10345 structure and CU. The actual information extracted and the type
10346 of structures created from the LNP depends on the value of PST.
10348 1. If PST is NULL, then this procedure uses the data from the program
10349 to create all necessary symbol tables, and their linetables.
10351 2. If PST is not NULL, this procedure reads the program to determine
10352 the list of files included by the unit represented by PST, and
10353 builds all the associated partial symbol tables.
10355 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10356 It is used for relative paths in the line table.
10357 NOTE: When processing partial symtabs (pst != NULL),
10358 comp_dir == pst->dirname.
10360 NOTE: It is important that psymtabs have the same file name (via strcmp)
10361 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10362 symtab we don't use it in the name of the psymtabs we create.
10363 E.g. expand_line_sal requires this when finding psymtabs to expand.
10364 A good testcase for this is mb-inline.exp. */
10367 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
, bfd
*abfd
,
10368 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10370 gdb_byte
*line_ptr
, *extended_end
;
10371 gdb_byte
*line_end
;
10372 unsigned int bytes_read
, extended_len
;
10373 unsigned char op_code
, extended_op
, adj_opcode
;
10374 CORE_ADDR baseaddr
;
10375 struct objfile
*objfile
= cu
->objfile
;
10376 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10377 const int decode_for_pst_p
= (pst
!= NULL
);
10378 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10380 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10382 line_ptr
= lh
->statement_program_start
;
10383 line_end
= lh
->statement_program_end
;
10385 /* Read the statement sequences until there's nothing left. */
10386 while (line_ptr
< line_end
)
10388 /* state machine registers */
10389 CORE_ADDR address
= 0;
10390 unsigned int file
= 1;
10391 unsigned int line
= 1;
10392 unsigned int column
= 0;
10393 int is_stmt
= lh
->default_is_stmt
;
10394 int basic_block
= 0;
10395 int end_sequence
= 0;
10397 unsigned char op_index
= 0;
10399 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10401 /* Start a subfile for the current file of the state machine. */
10402 /* lh->include_dirs and lh->file_names are 0-based, but the
10403 directory and file name numbers in the statement program
10405 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10409 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10411 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10414 /* Decode the table. */
10415 while (!end_sequence
)
10417 op_code
= read_1_byte (abfd
, line_ptr
);
10419 if (line_ptr
> line_end
)
10421 dwarf2_debug_line_missing_end_sequence_complaint ();
10425 if (op_code
>= lh
->opcode_base
)
10427 /* Special operand. */
10428 adj_opcode
= op_code
- lh
->opcode_base
;
10429 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10430 / lh
->maximum_ops_per_instruction
)
10431 * lh
->minimum_instruction_length
);
10432 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10433 % lh
->maximum_ops_per_instruction
);
10434 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10435 if (lh
->num_file_names
< file
|| file
== 0)
10436 dwarf2_debug_line_missing_file_complaint ();
10437 /* For now we ignore lines not starting on an
10438 instruction boundary. */
10439 else if (op_index
== 0)
10441 lh
->file_names
[file
- 1].included_p
= 1;
10442 if (!decode_for_pst_p
&& is_stmt
)
10444 if (last_subfile
!= current_subfile
)
10446 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10448 record_line (last_subfile
, 0, addr
);
10449 last_subfile
= current_subfile
;
10451 /* Append row to matrix using current values. */
10452 addr
= check_cu_functions (address
, cu
);
10453 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10454 record_line (current_subfile
, line
, addr
);
10459 else switch (op_code
)
10461 case DW_LNS_extended_op
:
10462 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
10464 line_ptr
+= bytes_read
;
10465 extended_end
= line_ptr
+ extended_len
;
10466 extended_op
= read_1_byte (abfd
, line_ptr
);
10468 switch (extended_op
)
10470 case DW_LNE_end_sequence
:
10473 case DW_LNE_set_address
:
10474 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10476 line_ptr
+= bytes_read
;
10477 address
+= baseaddr
;
10479 case DW_LNE_define_file
:
10482 unsigned int dir_index
, mod_time
, length
;
10484 cur_file
= read_direct_string (abfd
, line_ptr
,
10486 line_ptr
+= bytes_read
;
10488 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10489 line_ptr
+= bytes_read
;
10491 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10492 line_ptr
+= bytes_read
;
10494 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10495 line_ptr
+= bytes_read
;
10496 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10499 case DW_LNE_set_discriminator
:
10500 /* The discriminator is not interesting to the debugger;
10502 line_ptr
= extended_end
;
10505 complaint (&symfile_complaints
,
10506 _("mangled .debug_line section"));
10509 /* Make sure that we parsed the extended op correctly. If e.g.
10510 we expected a different address size than the producer used,
10511 we may have read the wrong number of bytes. */
10512 if (line_ptr
!= extended_end
)
10514 complaint (&symfile_complaints
,
10515 _("mangled .debug_line section"));
10520 if (lh
->num_file_names
< file
|| file
== 0)
10521 dwarf2_debug_line_missing_file_complaint ();
10524 lh
->file_names
[file
- 1].included_p
= 1;
10525 if (!decode_for_pst_p
&& is_stmt
)
10527 if (last_subfile
!= current_subfile
)
10529 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10531 record_line (last_subfile
, 0, addr
);
10532 last_subfile
= current_subfile
;
10534 addr
= check_cu_functions (address
, cu
);
10535 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10536 record_line (current_subfile
, line
, addr
);
10541 case DW_LNS_advance_pc
:
10544 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10546 address
+= (((op_index
+ adjust
)
10547 / lh
->maximum_ops_per_instruction
)
10548 * lh
->minimum_instruction_length
);
10549 op_index
= ((op_index
+ adjust
)
10550 % lh
->maximum_ops_per_instruction
);
10551 line_ptr
+= bytes_read
;
10554 case DW_LNS_advance_line
:
10555 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10556 line_ptr
+= bytes_read
;
10558 case DW_LNS_set_file
:
10560 /* The arrays lh->include_dirs and lh->file_names are
10561 0-based, but the directory and file name numbers in
10562 the statement program are 1-based. */
10563 struct file_entry
*fe
;
10566 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10567 line_ptr
+= bytes_read
;
10568 if (lh
->num_file_names
< file
|| file
== 0)
10569 dwarf2_debug_line_missing_file_complaint ();
10572 fe
= &lh
->file_names
[file
- 1];
10574 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10575 if (!decode_for_pst_p
)
10577 last_subfile
= current_subfile
;
10578 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10583 case DW_LNS_set_column
:
10584 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10585 line_ptr
+= bytes_read
;
10587 case DW_LNS_negate_stmt
:
10588 is_stmt
= (!is_stmt
);
10590 case DW_LNS_set_basic_block
:
10593 /* Add to the address register of the state machine the
10594 address increment value corresponding to special opcode
10595 255. I.e., this value is scaled by the minimum
10596 instruction length since special opcode 255 would have
10597 scaled the the increment. */
10598 case DW_LNS_const_add_pc
:
10600 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10602 address
+= (((op_index
+ adjust
)
10603 / lh
->maximum_ops_per_instruction
)
10604 * lh
->minimum_instruction_length
);
10605 op_index
= ((op_index
+ adjust
)
10606 % lh
->maximum_ops_per_instruction
);
10609 case DW_LNS_fixed_advance_pc
:
10610 address
+= read_2_bytes (abfd
, line_ptr
);
10616 /* Unknown standard opcode, ignore it. */
10619 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10621 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10622 line_ptr
+= bytes_read
;
10627 if (lh
->num_file_names
< file
|| file
== 0)
10628 dwarf2_debug_line_missing_file_complaint ();
10631 lh
->file_names
[file
- 1].included_p
= 1;
10632 if (!decode_for_pst_p
)
10634 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10635 record_line (current_subfile
, 0, addr
);
10640 if (decode_for_pst_p
)
10644 /* Now that we're done scanning the Line Header Program, we can
10645 create the psymtab of each included file. */
10646 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10647 if (lh
->file_names
[file_index
].included_p
== 1)
10649 char *include_name
=
10650 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10651 if (include_name
!= NULL
)
10652 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10657 /* Make sure a symtab is created for every file, even files
10658 which contain only variables (i.e. no code with associated
10662 struct file_entry
*fe
;
10664 for (i
= 0; i
< lh
->num_file_names
; i
++)
10668 fe
= &lh
->file_names
[i
];
10670 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10671 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10673 /* Skip the main file; we don't need it, and it must be
10674 allocated last, so that it will show up before the
10675 non-primary symtabs in the objfile's symtab list. */
10676 if (current_subfile
== first_subfile
)
10679 if (current_subfile
->symtab
== NULL
)
10680 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10682 fe
->symtab
= current_subfile
->symtab
;
10687 /* Start a subfile for DWARF. FILENAME is the name of the file and
10688 DIRNAME the name of the source directory which contains FILENAME
10689 or NULL if not known. COMP_DIR is the compilation directory for the
10690 linetable's compilation unit or NULL if not known.
10691 This routine tries to keep line numbers from identical absolute and
10692 relative file names in a common subfile.
10694 Using the `list' example from the GDB testsuite, which resides in
10695 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10696 of /srcdir/list0.c yields the following debugging information for list0.c:
10698 DW_AT_name: /srcdir/list0.c
10699 DW_AT_comp_dir: /compdir
10700 files.files[0].name: list0.h
10701 files.files[0].dir: /srcdir
10702 files.files[1].name: list0.c
10703 files.files[1].dir: /srcdir
10705 The line number information for list0.c has to end up in a single
10706 subfile, so that `break /srcdir/list0.c:1' works as expected.
10707 start_subfile will ensure that this happens provided that we pass the
10708 concatenation of files.files[1].dir and files.files[1].name as the
10712 dwarf2_start_subfile (char *filename
, const char *dirname
,
10713 const char *comp_dir
)
10717 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10718 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10719 second argument to start_subfile. To be consistent, we do the
10720 same here. In order not to lose the line information directory,
10721 we concatenate it to the filename when it makes sense.
10722 Note that the Dwarf3 standard says (speaking of filenames in line
10723 information): ``The directory index is ignored for file names
10724 that represent full path names''. Thus ignoring dirname in the
10725 `else' branch below isn't an issue. */
10727 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10728 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10730 fullname
= filename
;
10732 start_subfile (fullname
, comp_dir
);
10734 if (fullname
!= filename
)
10739 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10740 struct dwarf2_cu
*cu
)
10742 struct objfile
*objfile
= cu
->objfile
;
10743 struct comp_unit_head
*cu_header
= &cu
->header
;
10745 /* NOTE drow/2003-01-30: There used to be a comment and some special
10746 code here to turn a symbol with DW_AT_external and a
10747 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10748 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10749 with some versions of binutils) where shared libraries could have
10750 relocations against symbols in their debug information - the
10751 minimal symbol would have the right address, but the debug info
10752 would not. It's no longer necessary, because we will explicitly
10753 apply relocations when we read in the debug information now. */
10755 /* A DW_AT_location attribute with no contents indicates that a
10756 variable has been optimized away. */
10757 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10759 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10763 /* Handle one degenerate form of location expression specially, to
10764 preserve GDB's previous behavior when section offsets are
10765 specified. If this is just a DW_OP_addr then mark this symbol
10768 if (attr_form_is_block (attr
)
10769 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10770 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10772 unsigned int dummy
;
10774 SYMBOL_VALUE_ADDRESS (sym
) =
10775 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10776 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10777 fixup_symbol_section (sym
, objfile
);
10778 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10779 SYMBOL_SECTION (sym
));
10783 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10784 expression evaluator, and use LOC_COMPUTED only when necessary
10785 (i.e. when the value of a register or memory location is
10786 referenced, or a thread-local block, etc.). Then again, it might
10787 not be worthwhile. I'm assuming that it isn't unless performance
10788 or memory numbers show me otherwise. */
10790 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10791 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10794 /* Given a pointer to a DWARF information entry, figure out if we need
10795 to make a symbol table entry for it, and if so, create a new entry
10796 and return a pointer to it.
10797 If TYPE is NULL, determine symbol type from the die, otherwise
10798 used the passed type.
10799 If SPACE is not NULL, use it to hold the new symbol. If it is
10800 NULL, allocate a new symbol on the objfile's obstack. */
10802 static struct symbol
*
10803 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10804 struct symbol
*space
)
10806 struct objfile
*objfile
= cu
->objfile
;
10807 struct symbol
*sym
= NULL
;
10809 struct attribute
*attr
= NULL
;
10810 struct attribute
*attr2
= NULL
;
10811 CORE_ADDR baseaddr
;
10812 struct pending
**list_to_add
= NULL
;
10814 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10816 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10818 name
= dwarf2_name (die
, cu
);
10821 const char *linkagename
;
10822 int suppress_add
= 0;
10827 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10828 OBJSTAT (objfile
, n_syms
++);
10830 /* Cache this symbol's name and the name's demangled form (if any). */
10831 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10832 linkagename
= dwarf2_physname (name
, die
, cu
);
10833 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10835 /* Fortran does not have mangling standard and the mangling does differ
10836 between gfortran, iFort etc. */
10837 if (cu
->language
== language_fortran
10838 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10839 symbol_set_demangled_name (&(sym
->ginfo
),
10840 (char *) dwarf2_full_name (name
, die
, cu
),
10843 /* Default assumptions.
10844 Use the passed type or decode it from the die. */
10845 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10846 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10848 SYMBOL_TYPE (sym
) = type
;
10850 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10851 attr
= dwarf2_attr (die
,
10852 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10856 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10859 attr
= dwarf2_attr (die
,
10860 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10864 int file_index
= DW_UNSND (attr
);
10866 if (cu
->line_header
== NULL
10867 || file_index
> cu
->line_header
->num_file_names
)
10868 complaint (&symfile_complaints
,
10869 _("file index out of range"));
10870 else if (file_index
> 0)
10872 struct file_entry
*fe
;
10874 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10875 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10882 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10885 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10887 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10888 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10889 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10890 add_symbol_to_list (sym
, cu
->list_in_scope
);
10892 case DW_TAG_subprogram
:
10893 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10895 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10896 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10897 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10898 || cu
->language
== language_ada
)
10900 /* Subprograms marked external are stored as a global symbol.
10901 Ada subprograms, whether marked external or not, are always
10902 stored as a global symbol, because we want to be able to
10903 access them globally. For instance, we want to be able
10904 to break on a nested subprogram without having to
10905 specify the context. */
10906 list_to_add
= &global_symbols
;
10910 list_to_add
= cu
->list_in_scope
;
10913 case DW_TAG_inlined_subroutine
:
10914 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10916 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10917 SYMBOL_INLINED (sym
) = 1;
10918 /* Do not add the symbol to any lists. It will be found via
10919 BLOCK_FUNCTION from the blockvector. */
10921 case DW_TAG_template_value_param
:
10923 /* Fall through. */
10924 case DW_TAG_constant
:
10925 case DW_TAG_variable
:
10926 case DW_TAG_member
:
10927 /* Compilation with minimal debug info may result in
10928 variables with missing type entries. Change the
10929 misleading `void' type to something sensible. */
10930 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10932 = objfile_type (objfile
)->nodebug_data_symbol
;
10934 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10935 /* In the case of DW_TAG_member, we should only be called for
10936 static const members. */
10937 if (die
->tag
== DW_TAG_member
)
10939 /* dwarf2_add_field uses die_is_declaration,
10940 so we do the same. */
10941 gdb_assert (die_is_declaration (die
, cu
));
10946 dwarf2_const_value (attr
, sym
, cu
);
10947 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10950 if (attr2
&& (DW_UNSND (attr2
) != 0))
10951 list_to_add
= &global_symbols
;
10953 list_to_add
= cu
->list_in_scope
;
10957 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10960 var_decode_location (attr
, sym
, cu
);
10961 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10962 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10963 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10964 && !dwarf2_per_objfile
->has_section_at_zero
)
10966 /* When a static variable is eliminated by the linker,
10967 the corresponding debug information is not stripped
10968 out, but the variable address is set to null;
10969 do not add such variables into symbol table. */
10971 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10973 /* Workaround gfortran PR debug/40040 - it uses
10974 DW_AT_location for variables in -fPIC libraries which may
10975 get overriden by other libraries/executable and get
10976 a different address. Resolve it by the minimal symbol
10977 which may come from inferior's executable using copy
10978 relocation. Make this workaround only for gfortran as for
10979 other compilers GDB cannot guess the minimal symbol
10980 Fortran mangling kind. */
10981 if (cu
->language
== language_fortran
&& die
->parent
10982 && die
->parent
->tag
== DW_TAG_module
10984 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10985 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10987 /* A variable with DW_AT_external is never static,
10988 but it may be block-scoped. */
10989 list_to_add
= (cu
->list_in_scope
== &file_symbols
10990 ? &global_symbols
: cu
->list_in_scope
);
10993 list_to_add
= cu
->list_in_scope
;
10997 /* We do not know the address of this symbol.
10998 If it is an external symbol and we have type information
10999 for it, enter the symbol as a LOC_UNRESOLVED symbol.
11000 The address of the variable will then be determined from
11001 the minimal symbol table whenever the variable is
11003 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11004 if (attr2
&& (DW_UNSND (attr2
) != 0)
11005 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
11007 /* A variable with DW_AT_external is never static, but it
11008 may be block-scoped. */
11009 list_to_add
= (cu
->list_in_scope
== &file_symbols
11010 ? &global_symbols
: cu
->list_in_scope
);
11012 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11014 else if (!die_is_declaration (die
, cu
))
11016 /* Use the default LOC_OPTIMIZED_OUT class. */
11017 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
11019 list_to_add
= cu
->list_in_scope
;
11023 case DW_TAG_formal_parameter
:
11024 /* If we are inside a function, mark this as an argument. If
11025 not, we might be looking at an argument to an inlined function
11026 when we do not have enough information to show inlined frames;
11027 pretend it's a local variable in that case so that the user can
11029 if (context_stack_depth
> 0
11030 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
11031 SYMBOL_IS_ARGUMENT (sym
) = 1;
11032 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11035 var_decode_location (attr
, sym
, cu
);
11037 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11040 dwarf2_const_value (attr
, sym
, cu
);
11042 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
11043 if (attr
&& DW_UNSND (attr
))
11045 struct type
*ref_type
;
11047 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
11048 SYMBOL_TYPE (sym
) = ref_type
;
11051 list_to_add
= cu
->list_in_scope
;
11053 case DW_TAG_unspecified_parameters
:
11054 /* From varargs functions; gdb doesn't seem to have any
11055 interest in this information, so just ignore it for now.
11058 case DW_TAG_template_type_param
:
11060 /* Fall through. */
11061 case DW_TAG_class_type
:
11062 case DW_TAG_interface_type
:
11063 case DW_TAG_structure_type
:
11064 case DW_TAG_union_type
:
11065 case DW_TAG_set_type
:
11066 case DW_TAG_enumeration_type
:
11067 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11068 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
11071 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11072 really ever be static objects: otherwise, if you try
11073 to, say, break of a class's method and you're in a file
11074 which doesn't mention that class, it won't work unless
11075 the check for all static symbols in lookup_symbol_aux
11076 saves you. See the OtherFileClass tests in
11077 gdb.c++/namespace.exp. */
11081 list_to_add
= (cu
->list_in_scope
== &file_symbols
11082 && (cu
->language
== language_cplus
11083 || cu
->language
== language_java
)
11084 ? &global_symbols
: cu
->list_in_scope
);
11086 /* The semantics of C++ state that "struct foo {
11087 ... }" also defines a typedef for "foo". A Java
11088 class declaration also defines a typedef for the
11090 if (cu
->language
== language_cplus
11091 || cu
->language
== language_java
11092 || cu
->language
== language_ada
)
11094 /* The symbol's name is already allocated along
11095 with this objfile, so we don't need to
11096 duplicate it for the type. */
11097 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
11098 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
11103 case DW_TAG_typedef
:
11104 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11105 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11106 list_to_add
= cu
->list_in_scope
;
11108 case DW_TAG_base_type
:
11109 case DW_TAG_subrange_type
:
11110 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11111 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11112 list_to_add
= cu
->list_in_scope
;
11114 case DW_TAG_enumerator
:
11115 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11118 dwarf2_const_value (attr
, sym
, cu
);
11121 /* NOTE: carlton/2003-11-10: See comment above in the
11122 DW_TAG_class_type, etc. block. */
11124 list_to_add
= (cu
->list_in_scope
== &file_symbols
11125 && (cu
->language
== language_cplus
11126 || cu
->language
== language_java
)
11127 ? &global_symbols
: cu
->list_in_scope
);
11130 case DW_TAG_namespace
:
11131 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11132 list_to_add
= &global_symbols
;
11135 /* Not a tag we recognize. Hopefully we aren't processing
11136 trash data, but since we must specifically ignore things
11137 we don't recognize, there is nothing else we should do at
11139 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
11140 dwarf_tag_name (die
->tag
));
11146 sym
->hash_next
= objfile
->template_symbols
;
11147 objfile
->template_symbols
= sym
;
11148 list_to_add
= NULL
;
11151 if (list_to_add
!= NULL
)
11152 add_symbol_to_list (sym
, list_to_add
);
11154 /* For the benefit of old versions of GCC, check for anonymous
11155 namespaces based on the demangled name. */
11156 if (!processing_has_namespace_info
11157 && cu
->language
== language_cplus
)
11158 cp_scan_for_anonymous_namespaces (sym
);
11163 /* A wrapper for new_symbol_full that always allocates a new symbol. */
11165 static struct symbol
*
11166 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11168 return new_symbol_full (die
, type
, cu
, NULL
);
11171 /* Given an attr with a DW_FORM_dataN value in host byte order,
11172 zero-extend it as appropriate for the symbol's type. The DWARF
11173 standard (v4) is not entirely clear about the meaning of using
11174 DW_FORM_dataN for a constant with a signed type, where the type is
11175 wider than the data. The conclusion of a discussion on the DWARF
11176 list was that this is unspecified. We choose to always zero-extend
11177 because that is the interpretation long in use by GCC. */
11180 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
11181 const char *name
, struct obstack
*obstack
,
11182 struct dwarf2_cu
*cu
, long *value
, int bits
)
11184 struct objfile
*objfile
= cu
->objfile
;
11185 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
11186 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
11187 LONGEST l
= DW_UNSND (attr
);
11189 if (bits
< sizeof (*value
) * 8)
11191 l
&= ((LONGEST
) 1 << bits
) - 1;
11194 else if (bits
== sizeof (*value
) * 8)
11198 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
11199 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
11206 /* Read a constant value from an attribute. Either set *VALUE, or if
11207 the value does not fit in *VALUE, set *BYTES - either already
11208 allocated on the objfile obstack, or newly allocated on OBSTACK,
11209 or, set *BATON, if we translated the constant to a location
11213 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
11214 const char *name
, struct obstack
*obstack
,
11215 struct dwarf2_cu
*cu
,
11216 long *value
, gdb_byte
**bytes
,
11217 struct dwarf2_locexpr_baton
**baton
)
11219 struct objfile
*objfile
= cu
->objfile
;
11220 struct comp_unit_head
*cu_header
= &cu
->header
;
11221 struct dwarf_block
*blk
;
11222 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
11223 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
11229 switch (attr
->form
)
11235 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
11236 dwarf2_const_value_length_mismatch_complaint (name
,
11237 cu_header
->addr_size
,
11238 TYPE_LENGTH (type
));
11239 /* Symbols of this form are reasonably rare, so we just
11240 piggyback on the existing location code rather than writing
11241 a new implementation of symbol_computed_ops. */
11242 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
11243 sizeof (struct dwarf2_locexpr_baton
));
11244 (*baton
)->per_cu
= cu
->per_cu
;
11245 gdb_assert ((*baton
)->per_cu
);
11247 (*baton
)->size
= 2 + cu_header
->addr_size
;
11248 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
11249 (*baton
)->data
= data
;
11251 data
[0] = DW_OP_addr
;
11252 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
11253 byte_order
, DW_ADDR (attr
));
11254 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
11257 case DW_FORM_string
:
11259 /* DW_STRING is already allocated on the objfile obstack, point
11261 *bytes
= (gdb_byte
*) DW_STRING (attr
);
11263 case DW_FORM_block1
:
11264 case DW_FORM_block2
:
11265 case DW_FORM_block4
:
11266 case DW_FORM_block
:
11267 case DW_FORM_exprloc
:
11268 blk
= DW_BLOCK (attr
);
11269 if (TYPE_LENGTH (type
) != blk
->size
)
11270 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
11271 TYPE_LENGTH (type
));
11272 *bytes
= blk
->data
;
11275 /* The DW_AT_const_value attributes are supposed to carry the
11276 symbol's value "represented as it would be on the target
11277 architecture." By the time we get here, it's already been
11278 converted to host endianness, so we just need to sign- or
11279 zero-extend it as appropriate. */
11280 case DW_FORM_data1
:
11281 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11282 obstack
, cu
, value
, 8);
11284 case DW_FORM_data2
:
11285 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11286 obstack
, cu
, value
, 16);
11288 case DW_FORM_data4
:
11289 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11290 obstack
, cu
, value
, 32);
11292 case DW_FORM_data8
:
11293 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11294 obstack
, cu
, value
, 64);
11297 case DW_FORM_sdata
:
11298 *value
= DW_SND (attr
);
11301 case DW_FORM_udata
:
11302 *value
= DW_UNSND (attr
);
11306 complaint (&symfile_complaints
,
11307 _("unsupported const value attribute form: '%s'"),
11308 dwarf_form_name (attr
->form
));
11315 /* Copy constant value from an attribute to a symbol. */
11318 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
11319 struct dwarf2_cu
*cu
)
11321 struct objfile
*objfile
= cu
->objfile
;
11322 struct comp_unit_head
*cu_header
= &cu
->header
;
11325 struct dwarf2_locexpr_baton
*baton
;
11327 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
11328 SYMBOL_PRINT_NAME (sym
),
11329 &objfile
->objfile_obstack
, cu
,
11330 &value
, &bytes
, &baton
);
11334 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11335 SYMBOL_LOCATION_BATON (sym
) = baton
;
11336 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11338 else if (bytes
!= NULL
)
11340 SYMBOL_VALUE_BYTES (sym
) = bytes
;
11341 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11345 SYMBOL_VALUE (sym
) = value
;
11346 SYMBOL_CLASS (sym
) = LOC_CONST
;
11350 /* Return the type of the die in question using its DW_AT_type attribute. */
11352 static struct type
*
11353 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11355 struct attribute
*type_attr
;
11357 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11360 /* A missing DW_AT_type represents a void type. */
11361 return objfile_type (cu
->objfile
)->builtin_void
;
11364 return lookup_die_type (die
, type_attr
, cu
);
11367 /* True iff CU's producer generates GNAT Ada auxiliary information
11368 that allows to find parallel types through that information instead
11369 of having to do expensive parallel lookups by type name. */
11372 need_gnat_info (struct dwarf2_cu
*cu
)
11374 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11375 of GNAT produces this auxiliary information, without any indication
11376 that it is produced. Part of enhancing the FSF version of GNAT
11377 to produce that information will be to put in place an indicator
11378 that we can use in order to determine whether the descriptive type
11379 info is available or not. One suggestion that has been made is
11380 to use a new attribute, attached to the CU die. For now, assume
11381 that the descriptive type info is not available. */
11385 /* Return the auxiliary type of the die in question using its
11386 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11387 attribute is not present. */
11389 static struct type
*
11390 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11392 struct attribute
*type_attr
;
11394 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11398 return lookup_die_type (die
, type_attr
, cu
);
11401 /* If DIE has a descriptive_type attribute, then set the TYPE's
11402 descriptive type accordingly. */
11405 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11406 struct dwarf2_cu
*cu
)
11408 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11410 if (descriptive_type
)
11412 ALLOCATE_GNAT_AUX_TYPE (type
);
11413 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11417 /* Return the containing type of the die in question using its
11418 DW_AT_containing_type attribute. */
11420 static struct type
*
11421 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11423 struct attribute
*type_attr
;
11425 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11427 error (_("Dwarf Error: Problem turning containing type into gdb type "
11428 "[in module %s]"), cu
->objfile
->name
);
11430 return lookup_die_type (die
, type_attr
, cu
);
11433 /* Look up the type of DIE in CU using its type attribute ATTR.
11434 If there is no type substitute an error marker. */
11436 static struct type
*
11437 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11438 struct dwarf2_cu
*cu
)
11440 struct type
*this_type
;
11442 /* First see if we have it cached. */
11444 if (is_ref_attr (attr
))
11446 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11448 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11450 else if (attr
->form
== DW_FORM_sig8
)
11452 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11453 struct dwarf2_cu
*sig_cu
;
11454 unsigned int offset
;
11456 /* sig_type will be NULL if the signatured type is missing from
11458 if (sig_type
== NULL
)
11459 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11460 "at 0x%x [in module %s]"),
11461 die
->offset
, cu
->objfile
->name
);
11463 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11464 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11465 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11469 dump_die_for_error (die
);
11470 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11471 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11474 /* If not cached we need to read it in. */
11476 if (this_type
== NULL
)
11478 struct die_info
*type_die
;
11479 struct dwarf2_cu
*type_cu
= cu
;
11481 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11482 /* If the type is cached, we should have found it above. */
11483 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11484 this_type
= read_type_die_1 (type_die
, type_cu
);
11487 /* If we still don't have a type use an error marker. */
11489 if (this_type
== NULL
)
11491 char *message
, *saved
;
11493 /* read_type_die already issued a complaint. */
11494 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11498 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11499 message
, strlen (message
));
11502 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11508 /* Return the type in DIE, CU.
11509 Returns NULL for invalid types.
11511 This first does a lookup in the appropriate type_hash table,
11512 and only reads the die in if necessary.
11514 NOTE: This can be called when reading in partial or full symbols. */
11516 static struct type
*
11517 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11519 struct type
*this_type
;
11521 this_type
= get_die_type (die
, cu
);
11525 return read_type_die_1 (die
, cu
);
11528 /* Read the type in DIE, CU.
11529 Returns NULL for invalid types. */
11531 static struct type
*
11532 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11534 struct type
*this_type
= NULL
;
11538 case DW_TAG_class_type
:
11539 case DW_TAG_interface_type
:
11540 case DW_TAG_structure_type
:
11541 case DW_TAG_union_type
:
11542 this_type
= read_structure_type (die
, cu
);
11544 case DW_TAG_enumeration_type
:
11545 this_type
= read_enumeration_type (die
, cu
);
11547 case DW_TAG_subprogram
:
11548 case DW_TAG_subroutine_type
:
11549 case DW_TAG_inlined_subroutine
:
11550 this_type
= read_subroutine_type (die
, cu
);
11552 case DW_TAG_array_type
:
11553 this_type
= read_array_type (die
, cu
);
11555 case DW_TAG_set_type
:
11556 this_type
= read_set_type (die
, cu
);
11558 case DW_TAG_pointer_type
:
11559 this_type
= read_tag_pointer_type (die
, cu
);
11561 case DW_TAG_ptr_to_member_type
:
11562 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11564 case DW_TAG_reference_type
:
11565 this_type
= read_tag_reference_type (die
, cu
);
11567 case DW_TAG_const_type
:
11568 this_type
= read_tag_const_type (die
, cu
);
11570 case DW_TAG_volatile_type
:
11571 this_type
= read_tag_volatile_type (die
, cu
);
11573 case DW_TAG_string_type
:
11574 this_type
= read_tag_string_type (die
, cu
);
11576 case DW_TAG_typedef
:
11577 this_type
= read_typedef (die
, cu
);
11579 case DW_TAG_subrange_type
:
11580 this_type
= read_subrange_type (die
, cu
);
11582 case DW_TAG_base_type
:
11583 this_type
= read_base_type (die
, cu
);
11585 case DW_TAG_unspecified_type
:
11586 this_type
= read_unspecified_type (die
, cu
);
11588 case DW_TAG_namespace
:
11589 this_type
= read_namespace_type (die
, cu
);
11591 case DW_TAG_module
:
11592 this_type
= read_module_type (die
, cu
);
11595 complaint (&symfile_complaints
,
11596 _("unexpected tag in read_type_die: '%s'"),
11597 dwarf_tag_name (die
->tag
));
11604 /* See if we can figure out if the class lives in a namespace. We do
11605 this by looking for a member function; its demangled name will
11606 contain namespace info, if there is any.
11607 Return the computed name or NULL.
11608 Space for the result is allocated on the objfile's obstack.
11609 This is the full-die version of guess_partial_die_structure_name.
11610 In this case we know DIE has no useful parent. */
11613 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11615 struct die_info
*spec_die
;
11616 struct dwarf2_cu
*spec_cu
;
11617 struct die_info
*child
;
11620 spec_die
= die_specification (die
, &spec_cu
);
11621 if (spec_die
!= NULL
)
11627 for (child
= die
->child
;
11629 child
= child
->sibling
)
11631 if (child
->tag
== DW_TAG_subprogram
)
11633 struct attribute
*attr
;
11635 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
11637 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
11641 = language_class_name_from_physname (cu
->language_defn
,
11645 if (actual_name
!= NULL
)
11647 char *die_name
= dwarf2_name (die
, cu
);
11649 if (die_name
!= NULL
11650 && strcmp (die_name
, actual_name
) != 0)
11652 /* Strip off the class name from the full name.
11653 We want the prefix. */
11654 int die_name_len
= strlen (die_name
);
11655 int actual_name_len
= strlen (actual_name
);
11657 /* Test for '::' as a sanity check. */
11658 if (actual_name_len
> die_name_len
+ 2
11659 && actual_name
[actual_name_len
11660 - die_name_len
- 1] == ':')
11662 obsavestring (actual_name
,
11663 actual_name_len
- die_name_len
- 2,
11664 &cu
->objfile
->objfile_obstack
);
11667 xfree (actual_name
);
11676 /* Return the name of the namespace/class that DIE is defined within,
11677 or "" if we can't tell. The caller should not xfree the result.
11679 For example, if we're within the method foo() in the following
11689 then determine_prefix on foo's die will return "N::C". */
11692 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11694 struct die_info
*parent
, *spec_die
;
11695 struct dwarf2_cu
*spec_cu
;
11696 struct type
*parent_type
;
11698 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11699 && cu
->language
!= language_fortran
)
11702 /* We have to be careful in the presence of DW_AT_specification.
11703 For example, with GCC 3.4, given the code
11707 // Definition of N::foo.
11711 then we'll have a tree of DIEs like this:
11713 1: DW_TAG_compile_unit
11714 2: DW_TAG_namespace // N
11715 3: DW_TAG_subprogram // declaration of N::foo
11716 4: DW_TAG_subprogram // definition of N::foo
11717 DW_AT_specification // refers to die #3
11719 Thus, when processing die #4, we have to pretend that we're in
11720 the context of its DW_AT_specification, namely the contex of die
11723 spec_die
= die_specification (die
, &spec_cu
);
11724 if (spec_die
== NULL
)
11725 parent
= die
->parent
;
11728 parent
= spec_die
->parent
;
11732 if (parent
== NULL
)
11734 else if (parent
->building_fullname
)
11737 const char *parent_name
;
11739 /* It has been seen on RealView 2.2 built binaries,
11740 DW_TAG_template_type_param types actually _defined_ as
11741 children of the parent class:
11744 template class <class Enum> Class{};
11745 Class<enum E> class_e;
11747 1: DW_TAG_class_type (Class)
11748 2: DW_TAG_enumeration_type (E)
11749 3: DW_TAG_enumerator (enum1:0)
11750 3: DW_TAG_enumerator (enum2:1)
11752 2: DW_TAG_template_type_param
11753 DW_AT_type DW_FORM_ref_udata (E)
11755 Besides being broken debug info, it can put GDB into an
11756 infinite loop. Consider:
11758 When we're building the full name for Class<E>, we'll start
11759 at Class, and go look over its template type parameters,
11760 finding E. We'll then try to build the full name of E, and
11761 reach here. We're now trying to build the full name of E,
11762 and look over the parent DIE for containing scope. In the
11763 broken case, if we followed the parent DIE of E, we'd again
11764 find Class, and once again go look at its template type
11765 arguments, etc., etc. Simply don't consider such parent die
11766 as source-level parent of this die (it can't be, the language
11767 doesn't allow it), and break the loop here. */
11768 name
= dwarf2_name (die
, cu
);
11769 parent_name
= dwarf2_name (parent
, cu
);
11770 complaint (&symfile_complaints
,
11771 _("template param type '%s' defined within parent '%s'"),
11772 name
? name
: "<unknown>",
11773 parent_name
? parent_name
: "<unknown>");
11777 switch (parent
->tag
)
11779 case DW_TAG_namespace
:
11780 parent_type
= read_type_die (parent
, cu
);
11781 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11782 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11783 Work around this problem here. */
11784 if (cu
->language
== language_cplus
11785 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11787 /* We give a name to even anonymous namespaces. */
11788 return TYPE_TAG_NAME (parent_type
);
11789 case DW_TAG_class_type
:
11790 case DW_TAG_interface_type
:
11791 case DW_TAG_structure_type
:
11792 case DW_TAG_union_type
:
11793 case DW_TAG_module
:
11794 parent_type
= read_type_die (parent
, cu
);
11795 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11796 return TYPE_TAG_NAME (parent_type
);
11798 /* An anonymous structure is only allowed non-static data
11799 members; no typedefs, no member functions, et cetera.
11800 So it does not need a prefix. */
11802 case DW_TAG_compile_unit
:
11803 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
11804 if (cu
->language
== language_cplus
11805 && dwarf2_per_objfile
->types
.asection
!= NULL
11806 && die
->child
!= NULL
11807 && (die
->tag
== DW_TAG_class_type
11808 || die
->tag
== DW_TAG_structure_type
11809 || die
->tag
== DW_TAG_union_type
))
11811 char *name
= guess_full_die_structure_name (die
, cu
);
11817 return determine_prefix (parent
, cu
);
11821 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
11822 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11823 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
11824 an obconcat, otherwise allocate storage for the result. The CU argument is
11825 used to determine the language and hence, the appropriate separator. */
11827 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11830 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11831 int physname
, struct dwarf2_cu
*cu
)
11833 const char *lead
= "";
11836 if (suffix
== NULL
|| suffix
[0] == '\0'
11837 || prefix
== NULL
|| prefix
[0] == '\0')
11839 else if (cu
->language
== language_java
)
11841 else if (cu
->language
== language_fortran
&& physname
)
11843 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11844 DW_AT_MIPS_linkage_name is preferred and used instead. */
11852 if (prefix
== NULL
)
11854 if (suffix
== NULL
)
11860 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11862 strcpy (retval
, lead
);
11863 strcat (retval
, prefix
);
11864 strcat (retval
, sep
);
11865 strcat (retval
, suffix
);
11870 /* We have an obstack. */
11871 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11875 /* Return sibling of die, NULL if no sibling. */
11877 static struct die_info
*
11878 sibling_die (struct die_info
*die
)
11880 return die
->sibling
;
11883 /* Get name of a die, return NULL if not found. */
11886 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11887 struct obstack
*obstack
)
11889 if (name
&& cu
->language
== language_cplus
)
11891 char *canon_name
= cp_canonicalize_string (name
);
11893 if (canon_name
!= NULL
)
11895 if (strcmp (canon_name
, name
) != 0)
11896 name
= obsavestring (canon_name
, strlen (canon_name
),
11898 xfree (canon_name
);
11905 /* Get name of a die, return NULL if not found. */
11908 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11910 struct attribute
*attr
;
11912 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11913 if (!attr
|| !DW_STRING (attr
))
11918 case DW_TAG_compile_unit
:
11919 /* Compilation units have a DW_AT_name that is a filename, not
11920 a source language identifier. */
11921 case DW_TAG_enumeration_type
:
11922 case DW_TAG_enumerator
:
11923 /* These tags always have simple identifiers already; no need
11924 to canonicalize them. */
11925 return DW_STRING (attr
);
11927 case DW_TAG_subprogram
:
11928 /* Java constructors will all be named "<init>", so return
11929 the class name when we see this special case. */
11930 if (cu
->language
== language_java
11931 && DW_STRING (attr
) != NULL
11932 && strcmp (DW_STRING (attr
), "<init>") == 0)
11934 struct dwarf2_cu
*spec_cu
= cu
;
11935 struct die_info
*spec_die
;
11937 /* GCJ will output '<init>' for Java constructor names.
11938 For this special case, return the name of the parent class. */
11940 /* GCJ may output suprogram DIEs with AT_specification set.
11941 If so, use the name of the specified DIE. */
11942 spec_die
= die_specification (die
, &spec_cu
);
11943 if (spec_die
!= NULL
)
11944 return dwarf2_name (spec_die
, spec_cu
);
11949 if (die
->tag
== DW_TAG_class_type
)
11950 return dwarf2_name (die
, cu
);
11952 while (die
->tag
!= DW_TAG_compile_unit
);
11956 case DW_TAG_class_type
:
11957 case DW_TAG_interface_type
:
11958 case DW_TAG_structure_type
:
11959 case DW_TAG_union_type
:
11960 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11961 structures or unions. These were of the form "._%d" in GCC 4.1,
11962 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11963 and GCC 4.4. We work around this problem by ignoring these. */
11964 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11965 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11973 if (!DW_STRING_IS_CANONICAL (attr
))
11976 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11977 &cu
->objfile
->objfile_obstack
);
11978 DW_STRING_IS_CANONICAL (attr
) = 1;
11980 return DW_STRING (attr
);
11983 /* Return the die that this die in an extension of, or NULL if there
11984 is none. *EXT_CU is the CU containing DIE on input, and the CU
11985 containing the return value on output. */
11987 static struct die_info
*
11988 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11990 struct attribute
*attr
;
11992 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11996 return follow_die_ref (die
, attr
, ext_cu
);
11999 /* Convert a DIE tag into its string name. */
12002 dwarf_tag_name (unsigned tag
)
12006 case DW_TAG_padding
:
12007 return "DW_TAG_padding";
12008 case DW_TAG_array_type
:
12009 return "DW_TAG_array_type";
12010 case DW_TAG_class_type
:
12011 return "DW_TAG_class_type";
12012 case DW_TAG_entry_point
:
12013 return "DW_TAG_entry_point";
12014 case DW_TAG_enumeration_type
:
12015 return "DW_TAG_enumeration_type";
12016 case DW_TAG_formal_parameter
:
12017 return "DW_TAG_formal_parameter";
12018 case DW_TAG_imported_declaration
:
12019 return "DW_TAG_imported_declaration";
12021 return "DW_TAG_label";
12022 case DW_TAG_lexical_block
:
12023 return "DW_TAG_lexical_block";
12024 case DW_TAG_member
:
12025 return "DW_TAG_member";
12026 case DW_TAG_pointer_type
:
12027 return "DW_TAG_pointer_type";
12028 case DW_TAG_reference_type
:
12029 return "DW_TAG_reference_type";
12030 case DW_TAG_compile_unit
:
12031 return "DW_TAG_compile_unit";
12032 case DW_TAG_string_type
:
12033 return "DW_TAG_string_type";
12034 case DW_TAG_structure_type
:
12035 return "DW_TAG_structure_type";
12036 case DW_TAG_subroutine_type
:
12037 return "DW_TAG_subroutine_type";
12038 case DW_TAG_typedef
:
12039 return "DW_TAG_typedef";
12040 case DW_TAG_union_type
:
12041 return "DW_TAG_union_type";
12042 case DW_TAG_unspecified_parameters
:
12043 return "DW_TAG_unspecified_parameters";
12044 case DW_TAG_variant
:
12045 return "DW_TAG_variant";
12046 case DW_TAG_common_block
:
12047 return "DW_TAG_common_block";
12048 case DW_TAG_common_inclusion
:
12049 return "DW_TAG_common_inclusion";
12050 case DW_TAG_inheritance
:
12051 return "DW_TAG_inheritance";
12052 case DW_TAG_inlined_subroutine
:
12053 return "DW_TAG_inlined_subroutine";
12054 case DW_TAG_module
:
12055 return "DW_TAG_module";
12056 case DW_TAG_ptr_to_member_type
:
12057 return "DW_TAG_ptr_to_member_type";
12058 case DW_TAG_set_type
:
12059 return "DW_TAG_set_type";
12060 case DW_TAG_subrange_type
:
12061 return "DW_TAG_subrange_type";
12062 case DW_TAG_with_stmt
:
12063 return "DW_TAG_with_stmt";
12064 case DW_TAG_access_declaration
:
12065 return "DW_TAG_access_declaration";
12066 case DW_TAG_base_type
:
12067 return "DW_TAG_base_type";
12068 case DW_TAG_catch_block
:
12069 return "DW_TAG_catch_block";
12070 case DW_TAG_const_type
:
12071 return "DW_TAG_const_type";
12072 case DW_TAG_constant
:
12073 return "DW_TAG_constant";
12074 case DW_TAG_enumerator
:
12075 return "DW_TAG_enumerator";
12076 case DW_TAG_file_type
:
12077 return "DW_TAG_file_type";
12078 case DW_TAG_friend
:
12079 return "DW_TAG_friend";
12080 case DW_TAG_namelist
:
12081 return "DW_TAG_namelist";
12082 case DW_TAG_namelist_item
:
12083 return "DW_TAG_namelist_item";
12084 case DW_TAG_packed_type
:
12085 return "DW_TAG_packed_type";
12086 case DW_TAG_subprogram
:
12087 return "DW_TAG_subprogram";
12088 case DW_TAG_template_type_param
:
12089 return "DW_TAG_template_type_param";
12090 case DW_TAG_template_value_param
:
12091 return "DW_TAG_template_value_param";
12092 case DW_TAG_thrown_type
:
12093 return "DW_TAG_thrown_type";
12094 case DW_TAG_try_block
:
12095 return "DW_TAG_try_block";
12096 case DW_TAG_variant_part
:
12097 return "DW_TAG_variant_part";
12098 case DW_TAG_variable
:
12099 return "DW_TAG_variable";
12100 case DW_TAG_volatile_type
:
12101 return "DW_TAG_volatile_type";
12102 case DW_TAG_dwarf_procedure
:
12103 return "DW_TAG_dwarf_procedure";
12104 case DW_TAG_restrict_type
:
12105 return "DW_TAG_restrict_type";
12106 case DW_TAG_interface_type
:
12107 return "DW_TAG_interface_type";
12108 case DW_TAG_namespace
:
12109 return "DW_TAG_namespace";
12110 case DW_TAG_imported_module
:
12111 return "DW_TAG_imported_module";
12112 case DW_TAG_unspecified_type
:
12113 return "DW_TAG_unspecified_type";
12114 case DW_TAG_partial_unit
:
12115 return "DW_TAG_partial_unit";
12116 case DW_TAG_imported_unit
:
12117 return "DW_TAG_imported_unit";
12118 case DW_TAG_condition
:
12119 return "DW_TAG_condition";
12120 case DW_TAG_shared_type
:
12121 return "DW_TAG_shared_type";
12122 case DW_TAG_type_unit
:
12123 return "DW_TAG_type_unit";
12124 case DW_TAG_MIPS_loop
:
12125 return "DW_TAG_MIPS_loop";
12126 case DW_TAG_HP_array_descriptor
:
12127 return "DW_TAG_HP_array_descriptor";
12128 case DW_TAG_format_label
:
12129 return "DW_TAG_format_label";
12130 case DW_TAG_function_template
:
12131 return "DW_TAG_function_template";
12132 case DW_TAG_class_template
:
12133 return "DW_TAG_class_template";
12134 case DW_TAG_GNU_BINCL
:
12135 return "DW_TAG_GNU_BINCL";
12136 case DW_TAG_GNU_EINCL
:
12137 return "DW_TAG_GNU_EINCL";
12138 case DW_TAG_upc_shared_type
:
12139 return "DW_TAG_upc_shared_type";
12140 case DW_TAG_upc_strict_type
:
12141 return "DW_TAG_upc_strict_type";
12142 case DW_TAG_upc_relaxed_type
:
12143 return "DW_TAG_upc_relaxed_type";
12144 case DW_TAG_PGI_kanji_type
:
12145 return "DW_TAG_PGI_kanji_type";
12146 case DW_TAG_PGI_interface_block
:
12147 return "DW_TAG_PGI_interface_block";
12149 return "DW_TAG_<unknown>";
12153 /* Convert a DWARF attribute code into its string name. */
12156 dwarf_attr_name (unsigned attr
)
12160 case DW_AT_sibling
:
12161 return "DW_AT_sibling";
12162 case DW_AT_location
:
12163 return "DW_AT_location";
12165 return "DW_AT_name";
12166 case DW_AT_ordering
:
12167 return "DW_AT_ordering";
12168 case DW_AT_subscr_data
:
12169 return "DW_AT_subscr_data";
12170 case DW_AT_byte_size
:
12171 return "DW_AT_byte_size";
12172 case DW_AT_bit_offset
:
12173 return "DW_AT_bit_offset";
12174 case DW_AT_bit_size
:
12175 return "DW_AT_bit_size";
12176 case DW_AT_element_list
:
12177 return "DW_AT_element_list";
12178 case DW_AT_stmt_list
:
12179 return "DW_AT_stmt_list";
12181 return "DW_AT_low_pc";
12182 case DW_AT_high_pc
:
12183 return "DW_AT_high_pc";
12184 case DW_AT_language
:
12185 return "DW_AT_language";
12187 return "DW_AT_member";
12189 return "DW_AT_discr";
12190 case DW_AT_discr_value
:
12191 return "DW_AT_discr_value";
12192 case DW_AT_visibility
:
12193 return "DW_AT_visibility";
12195 return "DW_AT_import";
12196 case DW_AT_string_length
:
12197 return "DW_AT_string_length";
12198 case DW_AT_common_reference
:
12199 return "DW_AT_common_reference";
12200 case DW_AT_comp_dir
:
12201 return "DW_AT_comp_dir";
12202 case DW_AT_const_value
:
12203 return "DW_AT_const_value";
12204 case DW_AT_containing_type
:
12205 return "DW_AT_containing_type";
12206 case DW_AT_default_value
:
12207 return "DW_AT_default_value";
12209 return "DW_AT_inline";
12210 case DW_AT_is_optional
:
12211 return "DW_AT_is_optional";
12212 case DW_AT_lower_bound
:
12213 return "DW_AT_lower_bound";
12214 case DW_AT_producer
:
12215 return "DW_AT_producer";
12216 case DW_AT_prototyped
:
12217 return "DW_AT_prototyped";
12218 case DW_AT_return_addr
:
12219 return "DW_AT_return_addr";
12220 case DW_AT_start_scope
:
12221 return "DW_AT_start_scope";
12222 case DW_AT_bit_stride
:
12223 return "DW_AT_bit_stride";
12224 case DW_AT_upper_bound
:
12225 return "DW_AT_upper_bound";
12226 case DW_AT_abstract_origin
:
12227 return "DW_AT_abstract_origin";
12228 case DW_AT_accessibility
:
12229 return "DW_AT_accessibility";
12230 case DW_AT_address_class
:
12231 return "DW_AT_address_class";
12232 case DW_AT_artificial
:
12233 return "DW_AT_artificial";
12234 case DW_AT_base_types
:
12235 return "DW_AT_base_types";
12236 case DW_AT_calling_convention
:
12237 return "DW_AT_calling_convention";
12239 return "DW_AT_count";
12240 case DW_AT_data_member_location
:
12241 return "DW_AT_data_member_location";
12242 case DW_AT_decl_column
:
12243 return "DW_AT_decl_column";
12244 case DW_AT_decl_file
:
12245 return "DW_AT_decl_file";
12246 case DW_AT_decl_line
:
12247 return "DW_AT_decl_line";
12248 case DW_AT_declaration
:
12249 return "DW_AT_declaration";
12250 case DW_AT_discr_list
:
12251 return "DW_AT_discr_list";
12252 case DW_AT_encoding
:
12253 return "DW_AT_encoding";
12254 case DW_AT_external
:
12255 return "DW_AT_external";
12256 case DW_AT_frame_base
:
12257 return "DW_AT_frame_base";
12259 return "DW_AT_friend";
12260 case DW_AT_identifier_case
:
12261 return "DW_AT_identifier_case";
12262 case DW_AT_macro_info
:
12263 return "DW_AT_macro_info";
12264 case DW_AT_namelist_items
:
12265 return "DW_AT_namelist_items";
12266 case DW_AT_priority
:
12267 return "DW_AT_priority";
12268 case DW_AT_segment
:
12269 return "DW_AT_segment";
12270 case DW_AT_specification
:
12271 return "DW_AT_specification";
12272 case DW_AT_static_link
:
12273 return "DW_AT_static_link";
12275 return "DW_AT_type";
12276 case DW_AT_use_location
:
12277 return "DW_AT_use_location";
12278 case DW_AT_variable_parameter
:
12279 return "DW_AT_variable_parameter";
12280 case DW_AT_virtuality
:
12281 return "DW_AT_virtuality";
12282 case DW_AT_vtable_elem_location
:
12283 return "DW_AT_vtable_elem_location";
12284 /* DWARF 3 values. */
12285 case DW_AT_allocated
:
12286 return "DW_AT_allocated";
12287 case DW_AT_associated
:
12288 return "DW_AT_associated";
12289 case DW_AT_data_location
:
12290 return "DW_AT_data_location";
12291 case DW_AT_byte_stride
:
12292 return "DW_AT_byte_stride";
12293 case DW_AT_entry_pc
:
12294 return "DW_AT_entry_pc";
12295 case DW_AT_use_UTF8
:
12296 return "DW_AT_use_UTF8";
12297 case DW_AT_extension
:
12298 return "DW_AT_extension";
12300 return "DW_AT_ranges";
12301 case DW_AT_trampoline
:
12302 return "DW_AT_trampoline";
12303 case DW_AT_call_column
:
12304 return "DW_AT_call_column";
12305 case DW_AT_call_file
:
12306 return "DW_AT_call_file";
12307 case DW_AT_call_line
:
12308 return "DW_AT_call_line";
12309 case DW_AT_description
:
12310 return "DW_AT_description";
12311 case DW_AT_binary_scale
:
12312 return "DW_AT_binary_scale";
12313 case DW_AT_decimal_scale
:
12314 return "DW_AT_decimal_scale";
12316 return "DW_AT_small";
12317 case DW_AT_decimal_sign
:
12318 return "DW_AT_decimal_sign";
12319 case DW_AT_digit_count
:
12320 return "DW_AT_digit_count";
12321 case DW_AT_picture_string
:
12322 return "DW_AT_picture_string";
12323 case DW_AT_mutable
:
12324 return "DW_AT_mutable";
12325 case DW_AT_threads_scaled
:
12326 return "DW_AT_threads_scaled";
12327 case DW_AT_explicit
:
12328 return "DW_AT_explicit";
12329 case DW_AT_object_pointer
:
12330 return "DW_AT_object_pointer";
12331 case DW_AT_endianity
:
12332 return "DW_AT_endianity";
12333 case DW_AT_elemental
:
12334 return "DW_AT_elemental";
12336 return "DW_AT_pure";
12337 case DW_AT_recursive
:
12338 return "DW_AT_recursive";
12339 /* DWARF 4 values. */
12340 case DW_AT_signature
:
12341 return "DW_AT_signature";
12342 case DW_AT_linkage_name
:
12343 return "DW_AT_linkage_name";
12344 /* SGI/MIPS extensions. */
12345 #ifdef MIPS /* collides with DW_AT_HP_block_index */
12346 case DW_AT_MIPS_fde
:
12347 return "DW_AT_MIPS_fde";
12349 case DW_AT_MIPS_loop_begin
:
12350 return "DW_AT_MIPS_loop_begin";
12351 case DW_AT_MIPS_tail_loop_begin
:
12352 return "DW_AT_MIPS_tail_loop_begin";
12353 case DW_AT_MIPS_epilog_begin
:
12354 return "DW_AT_MIPS_epilog_begin";
12355 case DW_AT_MIPS_loop_unroll_factor
:
12356 return "DW_AT_MIPS_loop_unroll_factor";
12357 case DW_AT_MIPS_software_pipeline_depth
:
12358 return "DW_AT_MIPS_software_pipeline_depth";
12359 case DW_AT_MIPS_linkage_name
:
12360 return "DW_AT_MIPS_linkage_name";
12361 case DW_AT_MIPS_stride
:
12362 return "DW_AT_MIPS_stride";
12363 case DW_AT_MIPS_abstract_name
:
12364 return "DW_AT_MIPS_abstract_name";
12365 case DW_AT_MIPS_clone_origin
:
12366 return "DW_AT_MIPS_clone_origin";
12367 case DW_AT_MIPS_has_inlines
:
12368 return "DW_AT_MIPS_has_inlines";
12369 /* HP extensions. */
12370 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
12371 case DW_AT_HP_block_index
:
12372 return "DW_AT_HP_block_index";
12374 case DW_AT_HP_unmodifiable
:
12375 return "DW_AT_HP_unmodifiable";
12376 case DW_AT_HP_actuals_stmt_list
:
12377 return "DW_AT_HP_actuals_stmt_list";
12378 case DW_AT_HP_proc_per_section
:
12379 return "DW_AT_HP_proc_per_section";
12380 case DW_AT_HP_raw_data_ptr
:
12381 return "DW_AT_HP_raw_data_ptr";
12382 case DW_AT_HP_pass_by_reference
:
12383 return "DW_AT_HP_pass_by_reference";
12384 case DW_AT_HP_opt_level
:
12385 return "DW_AT_HP_opt_level";
12386 case DW_AT_HP_prof_version_id
:
12387 return "DW_AT_HP_prof_version_id";
12388 case DW_AT_HP_opt_flags
:
12389 return "DW_AT_HP_opt_flags";
12390 case DW_AT_HP_cold_region_low_pc
:
12391 return "DW_AT_HP_cold_region_low_pc";
12392 case DW_AT_HP_cold_region_high_pc
:
12393 return "DW_AT_HP_cold_region_high_pc";
12394 case DW_AT_HP_all_variables_modifiable
:
12395 return "DW_AT_HP_all_variables_modifiable";
12396 case DW_AT_HP_linkage_name
:
12397 return "DW_AT_HP_linkage_name";
12398 case DW_AT_HP_prof_flags
:
12399 return "DW_AT_HP_prof_flags";
12400 /* GNU extensions. */
12401 case DW_AT_sf_names
:
12402 return "DW_AT_sf_names";
12403 case DW_AT_src_info
:
12404 return "DW_AT_src_info";
12405 case DW_AT_mac_info
:
12406 return "DW_AT_mac_info";
12407 case DW_AT_src_coords
:
12408 return "DW_AT_src_coords";
12409 case DW_AT_body_begin
:
12410 return "DW_AT_body_begin";
12411 case DW_AT_body_end
:
12412 return "DW_AT_body_end";
12413 case DW_AT_GNU_vector
:
12414 return "DW_AT_GNU_vector";
12415 case DW_AT_GNU_odr_signature
:
12416 return "DW_AT_GNU_odr_signature";
12417 /* VMS extensions. */
12418 case DW_AT_VMS_rtnbeg_pd_address
:
12419 return "DW_AT_VMS_rtnbeg_pd_address";
12420 /* UPC extension. */
12421 case DW_AT_upc_threads_scaled
:
12422 return "DW_AT_upc_threads_scaled";
12423 /* PGI (STMicroelectronics) extensions. */
12424 case DW_AT_PGI_lbase
:
12425 return "DW_AT_PGI_lbase";
12426 case DW_AT_PGI_soffset
:
12427 return "DW_AT_PGI_soffset";
12428 case DW_AT_PGI_lstride
:
12429 return "DW_AT_PGI_lstride";
12431 return "DW_AT_<unknown>";
12435 /* Convert a DWARF value form code into its string name. */
12438 dwarf_form_name (unsigned form
)
12443 return "DW_FORM_addr";
12444 case DW_FORM_block2
:
12445 return "DW_FORM_block2";
12446 case DW_FORM_block4
:
12447 return "DW_FORM_block4";
12448 case DW_FORM_data2
:
12449 return "DW_FORM_data2";
12450 case DW_FORM_data4
:
12451 return "DW_FORM_data4";
12452 case DW_FORM_data8
:
12453 return "DW_FORM_data8";
12454 case DW_FORM_string
:
12455 return "DW_FORM_string";
12456 case DW_FORM_block
:
12457 return "DW_FORM_block";
12458 case DW_FORM_block1
:
12459 return "DW_FORM_block1";
12460 case DW_FORM_data1
:
12461 return "DW_FORM_data1";
12463 return "DW_FORM_flag";
12464 case DW_FORM_sdata
:
12465 return "DW_FORM_sdata";
12467 return "DW_FORM_strp";
12468 case DW_FORM_udata
:
12469 return "DW_FORM_udata";
12470 case DW_FORM_ref_addr
:
12471 return "DW_FORM_ref_addr";
12473 return "DW_FORM_ref1";
12475 return "DW_FORM_ref2";
12477 return "DW_FORM_ref4";
12479 return "DW_FORM_ref8";
12480 case DW_FORM_ref_udata
:
12481 return "DW_FORM_ref_udata";
12482 case DW_FORM_indirect
:
12483 return "DW_FORM_indirect";
12484 case DW_FORM_sec_offset
:
12485 return "DW_FORM_sec_offset";
12486 case DW_FORM_exprloc
:
12487 return "DW_FORM_exprloc";
12488 case DW_FORM_flag_present
:
12489 return "DW_FORM_flag_present";
12491 return "DW_FORM_sig8";
12493 return "DW_FORM_<unknown>";
12497 /* Convert a DWARF stack opcode into its string name. */
12500 dwarf_stack_op_name (unsigned op
)
12505 return "DW_OP_addr";
12507 return "DW_OP_deref";
12508 case DW_OP_const1u
:
12509 return "DW_OP_const1u";
12510 case DW_OP_const1s
:
12511 return "DW_OP_const1s";
12512 case DW_OP_const2u
:
12513 return "DW_OP_const2u";
12514 case DW_OP_const2s
:
12515 return "DW_OP_const2s";
12516 case DW_OP_const4u
:
12517 return "DW_OP_const4u";
12518 case DW_OP_const4s
:
12519 return "DW_OP_const4s";
12520 case DW_OP_const8u
:
12521 return "DW_OP_const8u";
12522 case DW_OP_const8s
:
12523 return "DW_OP_const8s";
12525 return "DW_OP_constu";
12527 return "DW_OP_consts";
12529 return "DW_OP_dup";
12531 return "DW_OP_drop";
12533 return "DW_OP_over";
12535 return "DW_OP_pick";
12537 return "DW_OP_swap";
12539 return "DW_OP_rot";
12541 return "DW_OP_xderef";
12543 return "DW_OP_abs";
12545 return "DW_OP_and";
12547 return "DW_OP_div";
12549 return "DW_OP_minus";
12551 return "DW_OP_mod";
12553 return "DW_OP_mul";
12555 return "DW_OP_neg";
12557 return "DW_OP_not";
12561 return "DW_OP_plus";
12562 case DW_OP_plus_uconst
:
12563 return "DW_OP_plus_uconst";
12565 return "DW_OP_shl";
12567 return "DW_OP_shr";
12569 return "DW_OP_shra";
12571 return "DW_OP_xor";
12573 return "DW_OP_bra";
12587 return "DW_OP_skip";
12589 return "DW_OP_lit0";
12591 return "DW_OP_lit1";
12593 return "DW_OP_lit2";
12595 return "DW_OP_lit3";
12597 return "DW_OP_lit4";
12599 return "DW_OP_lit5";
12601 return "DW_OP_lit6";
12603 return "DW_OP_lit7";
12605 return "DW_OP_lit8";
12607 return "DW_OP_lit9";
12609 return "DW_OP_lit10";
12611 return "DW_OP_lit11";
12613 return "DW_OP_lit12";
12615 return "DW_OP_lit13";
12617 return "DW_OP_lit14";
12619 return "DW_OP_lit15";
12621 return "DW_OP_lit16";
12623 return "DW_OP_lit17";
12625 return "DW_OP_lit18";
12627 return "DW_OP_lit19";
12629 return "DW_OP_lit20";
12631 return "DW_OP_lit21";
12633 return "DW_OP_lit22";
12635 return "DW_OP_lit23";
12637 return "DW_OP_lit24";
12639 return "DW_OP_lit25";
12641 return "DW_OP_lit26";
12643 return "DW_OP_lit27";
12645 return "DW_OP_lit28";
12647 return "DW_OP_lit29";
12649 return "DW_OP_lit30";
12651 return "DW_OP_lit31";
12653 return "DW_OP_reg0";
12655 return "DW_OP_reg1";
12657 return "DW_OP_reg2";
12659 return "DW_OP_reg3";
12661 return "DW_OP_reg4";
12663 return "DW_OP_reg5";
12665 return "DW_OP_reg6";
12667 return "DW_OP_reg7";
12669 return "DW_OP_reg8";
12671 return "DW_OP_reg9";
12673 return "DW_OP_reg10";
12675 return "DW_OP_reg11";
12677 return "DW_OP_reg12";
12679 return "DW_OP_reg13";
12681 return "DW_OP_reg14";
12683 return "DW_OP_reg15";
12685 return "DW_OP_reg16";
12687 return "DW_OP_reg17";
12689 return "DW_OP_reg18";
12691 return "DW_OP_reg19";
12693 return "DW_OP_reg20";
12695 return "DW_OP_reg21";
12697 return "DW_OP_reg22";
12699 return "DW_OP_reg23";
12701 return "DW_OP_reg24";
12703 return "DW_OP_reg25";
12705 return "DW_OP_reg26";
12707 return "DW_OP_reg27";
12709 return "DW_OP_reg28";
12711 return "DW_OP_reg29";
12713 return "DW_OP_reg30";
12715 return "DW_OP_reg31";
12717 return "DW_OP_breg0";
12719 return "DW_OP_breg1";
12721 return "DW_OP_breg2";
12723 return "DW_OP_breg3";
12725 return "DW_OP_breg4";
12727 return "DW_OP_breg5";
12729 return "DW_OP_breg6";
12731 return "DW_OP_breg7";
12733 return "DW_OP_breg8";
12735 return "DW_OP_breg9";
12737 return "DW_OP_breg10";
12739 return "DW_OP_breg11";
12741 return "DW_OP_breg12";
12743 return "DW_OP_breg13";
12745 return "DW_OP_breg14";
12747 return "DW_OP_breg15";
12749 return "DW_OP_breg16";
12751 return "DW_OP_breg17";
12753 return "DW_OP_breg18";
12755 return "DW_OP_breg19";
12757 return "DW_OP_breg20";
12759 return "DW_OP_breg21";
12761 return "DW_OP_breg22";
12763 return "DW_OP_breg23";
12765 return "DW_OP_breg24";
12767 return "DW_OP_breg25";
12769 return "DW_OP_breg26";
12771 return "DW_OP_breg27";
12773 return "DW_OP_breg28";
12775 return "DW_OP_breg29";
12777 return "DW_OP_breg30";
12779 return "DW_OP_breg31";
12781 return "DW_OP_regx";
12783 return "DW_OP_fbreg";
12785 return "DW_OP_bregx";
12787 return "DW_OP_piece";
12788 case DW_OP_deref_size
:
12789 return "DW_OP_deref_size";
12790 case DW_OP_xderef_size
:
12791 return "DW_OP_xderef_size";
12793 return "DW_OP_nop";
12794 /* DWARF 3 extensions. */
12795 case DW_OP_push_object_address
:
12796 return "DW_OP_push_object_address";
12798 return "DW_OP_call2";
12800 return "DW_OP_call4";
12801 case DW_OP_call_ref
:
12802 return "DW_OP_call_ref";
12803 case DW_OP_form_tls_address
:
12804 return "DW_OP_form_tls_address";
12805 case DW_OP_call_frame_cfa
:
12806 return "DW_OP_call_frame_cfa";
12807 case DW_OP_bit_piece
:
12808 return "DW_OP_bit_piece";
12809 /* DWARF 4 extensions. */
12810 case DW_OP_implicit_value
:
12811 return "DW_OP_implicit_value";
12812 case DW_OP_stack_value
:
12813 return "DW_OP_stack_value";
12814 /* GNU extensions. */
12815 case DW_OP_GNU_push_tls_address
:
12816 return "DW_OP_GNU_push_tls_address";
12817 case DW_OP_GNU_uninit
:
12818 return "DW_OP_GNU_uninit";
12819 case DW_OP_GNU_implicit_pointer
:
12820 return "DW_OP_GNU_implicit_pointer";
12827 dwarf_bool_name (unsigned mybool
)
12835 /* Convert a DWARF type code into its string name. */
12838 dwarf_type_encoding_name (unsigned enc
)
12843 return "DW_ATE_void";
12844 case DW_ATE_address
:
12845 return "DW_ATE_address";
12846 case DW_ATE_boolean
:
12847 return "DW_ATE_boolean";
12848 case DW_ATE_complex_float
:
12849 return "DW_ATE_complex_float";
12851 return "DW_ATE_float";
12852 case DW_ATE_signed
:
12853 return "DW_ATE_signed";
12854 case DW_ATE_signed_char
:
12855 return "DW_ATE_signed_char";
12856 case DW_ATE_unsigned
:
12857 return "DW_ATE_unsigned";
12858 case DW_ATE_unsigned_char
:
12859 return "DW_ATE_unsigned_char";
12861 case DW_ATE_imaginary_float
:
12862 return "DW_ATE_imaginary_float";
12863 case DW_ATE_packed_decimal
:
12864 return "DW_ATE_packed_decimal";
12865 case DW_ATE_numeric_string
:
12866 return "DW_ATE_numeric_string";
12867 case DW_ATE_edited
:
12868 return "DW_ATE_edited";
12869 case DW_ATE_signed_fixed
:
12870 return "DW_ATE_signed_fixed";
12871 case DW_ATE_unsigned_fixed
:
12872 return "DW_ATE_unsigned_fixed";
12873 case DW_ATE_decimal_float
:
12874 return "DW_ATE_decimal_float";
12877 return "DW_ATE_UTF";
12878 /* HP extensions. */
12879 case DW_ATE_HP_float80
:
12880 return "DW_ATE_HP_float80";
12881 case DW_ATE_HP_complex_float80
:
12882 return "DW_ATE_HP_complex_float80";
12883 case DW_ATE_HP_float128
:
12884 return "DW_ATE_HP_float128";
12885 case DW_ATE_HP_complex_float128
:
12886 return "DW_ATE_HP_complex_float128";
12887 case DW_ATE_HP_floathpintel
:
12888 return "DW_ATE_HP_floathpintel";
12889 case DW_ATE_HP_imaginary_float80
:
12890 return "DW_ATE_HP_imaginary_float80";
12891 case DW_ATE_HP_imaginary_float128
:
12892 return "DW_ATE_HP_imaginary_float128";
12894 return "DW_ATE_<unknown>";
12898 /* Convert a DWARF call frame info operation to its string name. */
12902 dwarf_cfi_name (unsigned cfi_opc
)
12906 case DW_CFA_advance_loc
:
12907 return "DW_CFA_advance_loc";
12908 case DW_CFA_offset
:
12909 return "DW_CFA_offset";
12910 case DW_CFA_restore
:
12911 return "DW_CFA_restore";
12913 return "DW_CFA_nop";
12914 case DW_CFA_set_loc
:
12915 return "DW_CFA_set_loc";
12916 case DW_CFA_advance_loc1
:
12917 return "DW_CFA_advance_loc1";
12918 case DW_CFA_advance_loc2
:
12919 return "DW_CFA_advance_loc2";
12920 case DW_CFA_advance_loc4
:
12921 return "DW_CFA_advance_loc4";
12922 case DW_CFA_offset_extended
:
12923 return "DW_CFA_offset_extended";
12924 case DW_CFA_restore_extended
:
12925 return "DW_CFA_restore_extended";
12926 case DW_CFA_undefined
:
12927 return "DW_CFA_undefined";
12928 case DW_CFA_same_value
:
12929 return "DW_CFA_same_value";
12930 case DW_CFA_register
:
12931 return "DW_CFA_register";
12932 case DW_CFA_remember_state
:
12933 return "DW_CFA_remember_state";
12934 case DW_CFA_restore_state
:
12935 return "DW_CFA_restore_state";
12936 case DW_CFA_def_cfa
:
12937 return "DW_CFA_def_cfa";
12938 case DW_CFA_def_cfa_register
:
12939 return "DW_CFA_def_cfa_register";
12940 case DW_CFA_def_cfa_offset
:
12941 return "DW_CFA_def_cfa_offset";
12943 case DW_CFA_def_cfa_expression
:
12944 return "DW_CFA_def_cfa_expression";
12945 case DW_CFA_expression
:
12946 return "DW_CFA_expression";
12947 case DW_CFA_offset_extended_sf
:
12948 return "DW_CFA_offset_extended_sf";
12949 case DW_CFA_def_cfa_sf
:
12950 return "DW_CFA_def_cfa_sf";
12951 case DW_CFA_def_cfa_offset_sf
:
12952 return "DW_CFA_def_cfa_offset_sf";
12953 case DW_CFA_val_offset
:
12954 return "DW_CFA_val_offset";
12955 case DW_CFA_val_offset_sf
:
12956 return "DW_CFA_val_offset_sf";
12957 case DW_CFA_val_expression
:
12958 return "DW_CFA_val_expression";
12959 /* SGI/MIPS specific. */
12960 case DW_CFA_MIPS_advance_loc8
:
12961 return "DW_CFA_MIPS_advance_loc8";
12962 /* GNU extensions. */
12963 case DW_CFA_GNU_window_save
:
12964 return "DW_CFA_GNU_window_save";
12965 case DW_CFA_GNU_args_size
:
12966 return "DW_CFA_GNU_args_size";
12967 case DW_CFA_GNU_negative_offset_extended
:
12968 return "DW_CFA_GNU_negative_offset_extended";
12970 return "DW_CFA_<unknown>";
12976 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12980 print_spaces (indent
, f
);
12981 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12982 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12984 if (die
->parent
!= NULL
)
12986 print_spaces (indent
, f
);
12987 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12988 die
->parent
->offset
);
12991 print_spaces (indent
, f
);
12992 fprintf_unfiltered (f
, " has children: %s\n",
12993 dwarf_bool_name (die
->child
!= NULL
));
12995 print_spaces (indent
, f
);
12996 fprintf_unfiltered (f
, " attributes:\n");
12998 for (i
= 0; i
< die
->num_attrs
; ++i
)
13000 print_spaces (indent
, f
);
13001 fprintf_unfiltered (f
, " %s (%s) ",
13002 dwarf_attr_name (die
->attrs
[i
].name
),
13003 dwarf_form_name (die
->attrs
[i
].form
));
13005 switch (die
->attrs
[i
].form
)
13007 case DW_FORM_ref_addr
:
13009 fprintf_unfiltered (f
, "address: ");
13010 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
13012 case DW_FORM_block2
:
13013 case DW_FORM_block4
:
13014 case DW_FORM_block
:
13015 case DW_FORM_block1
:
13016 fprintf_unfiltered (f
, "block: size %d",
13017 DW_BLOCK (&die
->attrs
[i
])->size
);
13019 case DW_FORM_exprloc
:
13020 fprintf_unfiltered (f
, "expression: size %u",
13021 DW_BLOCK (&die
->attrs
[i
])->size
);
13026 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
13027 (long) (DW_ADDR (&die
->attrs
[i
])));
13029 case DW_FORM_data1
:
13030 case DW_FORM_data2
:
13031 case DW_FORM_data4
:
13032 case DW_FORM_data8
:
13033 case DW_FORM_udata
:
13034 case DW_FORM_sdata
:
13035 fprintf_unfiltered (f
, "constant: %s",
13036 pulongest (DW_UNSND (&die
->attrs
[i
])));
13038 case DW_FORM_sec_offset
:
13039 fprintf_unfiltered (f
, "section offset: %s",
13040 pulongest (DW_UNSND (&die
->attrs
[i
])));
13043 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
13044 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
13045 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
13047 fprintf_unfiltered (f
, "signatured type, offset: unknown");
13049 case DW_FORM_string
:
13051 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
13052 DW_STRING (&die
->attrs
[i
])
13053 ? DW_STRING (&die
->attrs
[i
]) : "",
13054 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
13057 if (DW_UNSND (&die
->attrs
[i
]))
13058 fprintf_unfiltered (f
, "flag: TRUE");
13060 fprintf_unfiltered (f
, "flag: FALSE");
13062 case DW_FORM_flag_present
:
13063 fprintf_unfiltered (f
, "flag: TRUE");
13065 case DW_FORM_indirect
:
13066 /* The reader will have reduced the indirect form to
13067 the "base form" so this form should not occur. */
13068 fprintf_unfiltered (f
,
13069 "unexpected attribute form: DW_FORM_indirect");
13072 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
13073 die
->attrs
[i
].form
);
13076 fprintf_unfiltered (f
, "\n");
13081 dump_die_for_error (struct die_info
*die
)
13083 dump_die_shallow (gdb_stderr
, 0, die
);
13087 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
13089 int indent
= level
* 4;
13091 gdb_assert (die
!= NULL
);
13093 if (level
>= max_level
)
13096 dump_die_shallow (f
, indent
, die
);
13098 if (die
->child
!= NULL
)
13100 print_spaces (indent
, f
);
13101 fprintf_unfiltered (f
, " Children:");
13102 if (level
+ 1 < max_level
)
13104 fprintf_unfiltered (f
, "\n");
13105 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
13109 fprintf_unfiltered (f
,
13110 " [not printed, max nesting level reached]\n");
13114 if (die
->sibling
!= NULL
&& level
> 0)
13116 dump_die_1 (f
, level
, max_level
, die
->sibling
);
13120 /* This is called from the pdie macro in gdbinit.in.
13121 It's not static so gcc will keep a copy callable from gdb. */
13124 dump_die (struct die_info
*die
, int max_level
)
13126 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
13130 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
13134 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
13140 is_ref_attr (struct attribute
*attr
)
13142 switch (attr
->form
)
13144 case DW_FORM_ref_addr
:
13149 case DW_FORM_ref_udata
:
13156 static unsigned int
13157 dwarf2_get_ref_die_offset (struct attribute
*attr
)
13159 if (is_ref_attr (attr
))
13160 return DW_ADDR (attr
);
13162 complaint (&symfile_complaints
,
13163 _("unsupported die ref attribute form: '%s'"),
13164 dwarf_form_name (attr
->form
));
13168 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
13169 * the value held by the attribute is not constant. */
13172 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
13174 if (attr
->form
== DW_FORM_sdata
)
13175 return DW_SND (attr
);
13176 else if (attr
->form
== DW_FORM_udata
13177 || attr
->form
== DW_FORM_data1
13178 || attr
->form
== DW_FORM_data2
13179 || attr
->form
== DW_FORM_data4
13180 || attr
->form
== DW_FORM_data8
)
13181 return DW_UNSND (attr
);
13184 complaint (&symfile_complaints
,
13185 _("Attribute value is not a constant (%s)"),
13186 dwarf_form_name (attr
->form
));
13187 return default_value
;
13191 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
13192 unit and add it to our queue.
13193 The result is non-zero if PER_CU was queued, otherwise the result is zero
13194 meaning either PER_CU is already queued or it is already loaded. */
13197 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
13198 struct dwarf2_per_cu_data
*per_cu
)
13200 /* We may arrive here during partial symbol reading, if we need full
13201 DIEs to process an unusual case (e.g. template arguments). Do
13202 not queue PER_CU, just tell our caller to load its DIEs. */
13203 if (dwarf2_per_objfile
->reading_partial_symbols
)
13205 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
13210 /* Mark the dependence relation so that we don't flush PER_CU
13212 dwarf2_add_dependence (this_cu
, per_cu
);
13214 /* If it's already on the queue, we have nothing to do. */
13215 if (per_cu
->queued
)
13218 /* If the compilation unit is already loaded, just mark it as
13220 if (per_cu
->cu
!= NULL
)
13222 per_cu
->cu
->last_used
= 0;
13226 /* Add it to the queue. */
13227 queue_comp_unit (per_cu
, this_cu
->objfile
);
13232 /* Follow reference or signature attribute ATTR of SRC_DIE.
13233 On entry *REF_CU is the CU of SRC_DIE.
13234 On exit *REF_CU is the CU of the result. */
13236 static struct die_info
*
13237 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
13238 struct dwarf2_cu
**ref_cu
)
13240 struct die_info
*die
;
13242 if (is_ref_attr (attr
))
13243 die
= follow_die_ref (src_die
, attr
, ref_cu
);
13244 else if (attr
->form
== DW_FORM_sig8
)
13245 die
= follow_die_sig (src_die
, attr
, ref_cu
);
13248 dump_die_for_error (src_die
);
13249 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
13250 (*ref_cu
)->objfile
->name
);
13256 /* Follow reference OFFSET.
13257 On entry *REF_CU is the CU of the source die referencing OFFSET.
13258 On exit *REF_CU is the CU of the result.
13259 Returns NULL if OFFSET is invalid. */
13261 static struct die_info
*
13262 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
13264 struct die_info temp_die
;
13265 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
13267 gdb_assert (cu
->per_cu
!= NULL
);
13271 if (cu
->per_cu
->from_debug_types
)
13273 /* .debug_types CUs cannot reference anything outside their CU.
13274 If they need to, they have to reference a signatured type via
13276 if (! offset_in_cu_p (&cu
->header
, offset
))
13279 else if (! offset_in_cu_p (&cu
->header
, offset
))
13281 struct dwarf2_per_cu_data
*per_cu
;
13283 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
13285 /* If necessary, add it to the queue and load its DIEs. */
13286 if (maybe_queue_comp_unit (cu
, per_cu
))
13287 load_full_comp_unit (per_cu
, cu
->objfile
);
13289 target_cu
= per_cu
->cu
;
13291 else if (cu
->dies
== NULL
)
13293 /* We're loading full DIEs during partial symbol reading. */
13294 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
13295 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
13298 *ref_cu
= target_cu
;
13299 temp_die
.offset
= offset
;
13300 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
13303 /* Follow reference attribute ATTR of SRC_DIE.
13304 On entry *REF_CU is the CU of SRC_DIE.
13305 On exit *REF_CU is the CU of the result. */
13307 static struct die_info
*
13308 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
13309 struct dwarf2_cu
**ref_cu
)
13311 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
13312 struct dwarf2_cu
*cu
= *ref_cu
;
13313 struct die_info
*die
;
13315 die
= follow_die_offset (offset
, ref_cu
);
13317 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
13318 "at 0x%x [in module %s]"),
13319 offset
, src_die
->offset
, cu
->objfile
->name
);
13324 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
13325 value is intended for DW_OP_call*. */
13327 struct dwarf2_locexpr_baton
13328 dwarf2_fetch_die_location_block (unsigned int offset
,
13329 struct dwarf2_per_cu_data
*per_cu
,
13330 CORE_ADDR (*get_frame_pc
) (void *baton
),
13333 struct dwarf2_cu
*cu
= per_cu
->cu
;
13334 struct die_info
*die
;
13335 struct attribute
*attr
;
13336 struct dwarf2_locexpr_baton retval
;
13338 dw2_setup (per_cu
->objfile
);
13340 die
= follow_die_offset (offset
, &cu
);
13342 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
13343 offset
, per_cu
->cu
->objfile
->name
);
13345 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13348 /* DWARF: "If there is no such attribute, then there is no effect.". */
13350 retval
.data
= NULL
;
13353 else if (attr_form_is_section_offset (attr
))
13355 struct dwarf2_loclist_baton loclist_baton
;
13356 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
13359 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
13361 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
13363 retval
.size
= size
;
13367 if (!attr_form_is_block (attr
))
13368 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
13369 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
13370 offset
, per_cu
->cu
->objfile
->name
);
13372 retval
.data
= DW_BLOCK (attr
)->data
;
13373 retval
.size
= DW_BLOCK (attr
)->size
;
13375 retval
.per_cu
= cu
->per_cu
;
13379 /* Follow the signature attribute ATTR in SRC_DIE.
13380 On entry *REF_CU is the CU of SRC_DIE.
13381 On exit *REF_CU is the CU of the result. */
13383 static struct die_info
*
13384 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
13385 struct dwarf2_cu
**ref_cu
)
13387 struct objfile
*objfile
= (*ref_cu
)->objfile
;
13388 struct die_info temp_die
;
13389 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
13390 struct dwarf2_cu
*sig_cu
;
13391 struct die_info
*die
;
13393 /* sig_type will be NULL if the signatured type is missing from
13395 if (sig_type
== NULL
)
13396 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13397 "at 0x%x [in module %s]"),
13398 src_die
->offset
, objfile
->name
);
13400 /* If necessary, add it to the queue and load its DIEs. */
13402 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
13403 read_signatured_type (objfile
, sig_type
);
13405 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
13407 sig_cu
= sig_type
->per_cu
.cu
;
13408 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
13409 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
13416 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
13417 "from DIE at 0x%x [in module %s]"),
13418 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
13421 /* Given an offset of a signatured type, return its signatured_type. */
13423 static struct signatured_type
*
13424 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
13426 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
13427 unsigned int length
, initial_length_size
;
13428 unsigned int sig_offset
;
13429 struct signatured_type find_entry
, *type_sig
;
13431 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
13432 sig_offset
= (initial_length_size
13434 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
13435 + 1 /*address_size*/);
13436 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
13437 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
13439 /* This is only used to lookup previously recorded types.
13440 If we didn't find it, it's our bug. */
13441 gdb_assert (type_sig
!= NULL
);
13442 gdb_assert (offset
== type_sig
->offset
);
13447 /* Read in signatured type at OFFSET and build its CU and die(s). */
13450 read_signatured_type_at_offset (struct objfile
*objfile
,
13451 unsigned int offset
)
13453 struct signatured_type
*type_sig
;
13455 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13457 /* We have the section offset, but we need the signature to do the
13458 hash table lookup. */
13459 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13461 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13463 read_signatured_type (objfile
, type_sig
);
13465 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13468 /* Read in a signatured type and build its CU and DIEs. */
13471 read_signatured_type (struct objfile
*objfile
,
13472 struct signatured_type
*type_sig
)
13474 gdb_byte
*types_ptr
;
13475 struct die_reader_specs reader_specs
;
13476 struct dwarf2_cu
*cu
;
13477 ULONGEST signature
;
13478 struct cleanup
*back_to
, *free_cu_cleanup
;
13480 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13481 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13483 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13485 cu
= xmalloc (sizeof (*cu
));
13486 init_one_comp_unit (cu
, objfile
);
13488 type_sig
->per_cu
.cu
= cu
;
13489 cu
->per_cu
= &type_sig
->per_cu
;
13491 /* If an error occurs while loading, release our storage. */
13492 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13494 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13495 types_ptr
, objfile
->obfd
);
13496 gdb_assert (signature
== type_sig
->signature
);
13499 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13503 &cu
->comp_unit_obstack
,
13504 hashtab_obstack_allocate
,
13505 dummy_obstack_deallocate
);
13507 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13508 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13510 init_cu_die_reader (&reader_specs
, cu
);
13512 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13515 /* We try not to read any attributes in this function, because not
13516 all objfiles needed for references have been loaded yet, and symbol
13517 table processing isn't initialized. But we have to set the CU language,
13518 or we won't be able to build types correctly. */
13519 prepare_one_comp_unit (cu
, cu
->dies
);
13521 do_cleanups (back_to
);
13523 /* We've successfully allocated this compilation unit. Let our caller
13524 clean it up when finished with it. */
13525 discard_cleanups (free_cu_cleanup
);
13527 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13528 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13531 /* Decode simple location descriptions.
13532 Given a pointer to a dwarf block that defines a location, compute
13533 the location and return the value.
13535 NOTE drow/2003-11-18: This function is called in two situations
13536 now: for the address of static or global variables (partial symbols
13537 only) and for offsets into structures which are expected to be
13538 (more or less) constant. The partial symbol case should go away,
13539 and only the constant case should remain. That will let this
13540 function complain more accurately. A few special modes are allowed
13541 without complaint for global variables (for instance, global
13542 register values and thread-local values).
13544 A location description containing no operations indicates that the
13545 object is optimized out. The return value is 0 for that case.
13546 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13547 callers will only want a very basic result and this can become a
13550 Note that stack[0] is unused except as a default error return. */
13553 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13555 struct objfile
*objfile
= cu
->objfile
;
13557 int size
= blk
->size
;
13558 gdb_byte
*data
= blk
->data
;
13559 CORE_ADDR stack
[64];
13561 unsigned int bytes_read
, unsnd
;
13567 stack
[++stacki
] = 0;
13606 stack
[++stacki
] = op
- DW_OP_lit0
;
13641 stack
[++stacki
] = op
- DW_OP_reg0
;
13643 dwarf2_complex_location_expr_complaint ();
13647 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13649 stack
[++stacki
] = unsnd
;
13651 dwarf2_complex_location_expr_complaint ();
13655 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13660 case DW_OP_const1u
:
13661 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13665 case DW_OP_const1s
:
13666 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13670 case DW_OP_const2u
:
13671 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13675 case DW_OP_const2s
:
13676 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13680 case DW_OP_const4u
:
13681 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13685 case DW_OP_const4s
:
13686 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13691 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13697 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13702 stack
[stacki
+ 1] = stack
[stacki
];
13707 stack
[stacki
- 1] += stack
[stacki
];
13711 case DW_OP_plus_uconst
:
13712 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
13718 stack
[stacki
- 1] -= stack
[stacki
];
13723 /* If we're not the last op, then we definitely can't encode
13724 this using GDB's address_class enum. This is valid for partial
13725 global symbols, although the variable's address will be bogus
13728 dwarf2_complex_location_expr_complaint ();
13731 case DW_OP_GNU_push_tls_address
:
13732 /* The top of the stack has the offset from the beginning
13733 of the thread control block at which the variable is located. */
13734 /* Nothing should follow this operator, so the top of stack would
13736 /* This is valid for partial global symbols, but the variable's
13737 address will be bogus in the psymtab. */
13739 dwarf2_complex_location_expr_complaint ();
13742 case DW_OP_GNU_uninit
:
13747 const char *name
= dwarf_stack_op_name (op
);
13750 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13753 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
13757 return (stack
[stacki
]);
13760 /* Enforce maximum stack depth of SIZE-1 to avoid writing
13761 outside of the allocated space. Also enforce minimum>0. */
13762 if (stacki
>= ARRAY_SIZE (stack
) - 1)
13764 complaint (&symfile_complaints
,
13765 _("location description stack overflow"));
13771 complaint (&symfile_complaints
,
13772 _("location description stack underflow"));
13776 return (stack
[stacki
]);
13779 /* memory allocation interface */
13781 static struct dwarf_block
*
13782 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13784 struct dwarf_block
*blk
;
13786 blk
= (struct dwarf_block
*)
13787 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13791 static struct abbrev_info
*
13792 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13794 struct abbrev_info
*abbrev
;
13796 abbrev
= (struct abbrev_info
*)
13797 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13798 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13802 static struct die_info
*
13803 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13805 struct die_info
*die
;
13806 size_t size
= sizeof (struct die_info
);
13809 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13811 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13812 memset (die
, 0, sizeof (struct die_info
));
13817 /* Macro support. */
13819 /* Return the full name of file number I in *LH's file name table.
13820 Use COMP_DIR as the name of the current directory of the
13821 compilation. The result is allocated using xmalloc; the caller is
13822 responsible for freeing it. */
13824 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13826 /* Is the file number a valid index into the line header's file name
13827 table? Remember that file numbers start with one, not zero. */
13828 if (1 <= file
&& file
<= lh
->num_file_names
)
13830 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13832 if (IS_ABSOLUTE_PATH (fe
->name
))
13833 return xstrdup (fe
->name
);
13841 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13847 dir_len
= strlen (dir
);
13848 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13849 strcpy (full_name
, dir
);
13850 full_name
[dir_len
] = '/';
13851 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13855 return xstrdup (fe
->name
);
13860 /* The compiler produced a bogus file number. We can at least
13861 record the macro definitions made in the file, even if we
13862 won't be able to find the file by name. */
13863 char fake_name
[80];
13865 sprintf (fake_name
, "<bad macro file number %d>", file
);
13867 complaint (&symfile_complaints
,
13868 _("bad file number in macro information (%d)"),
13871 return xstrdup (fake_name
);
13876 static struct macro_source_file
*
13877 macro_start_file (int file
, int line
,
13878 struct macro_source_file
*current_file
,
13879 const char *comp_dir
,
13880 struct line_header
*lh
, struct objfile
*objfile
)
13882 /* The full name of this source file. */
13883 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13885 /* We don't create a macro table for this compilation unit
13886 at all until we actually get a filename. */
13887 if (! pending_macros
)
13888 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13889 objfile
->macro_cache
);
13891 if (! current_file
)
13892 /* If we have no current file, then this must be the start_file
13893 directive for the compilation unit's main source file. */
13894 current_file
= macro_set_main (pending_macros
, full_name
);
13896 current_file
= macro_include (current_file
, line
, full_name
);
13900 return current_file
;
13904 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13905 followed by a null byte. */
13907 copy_string (const char *buf
, int len
)
13909 char *s
= xmalloc (len
+ 1);
13911 memcpy (s
, buf
, len
);
13917 static const char *
13918 consume_improper_spaces (const char *p
, const char *body
)
13922 complaint (&symfile_complaints
,
13923 _("macro definition contains spaces "
13924 "in formal argument list:\n`%s'"),
13936 parse_macro_definition (struct macro_source_file
*file
, int line
,
13941 /* The body string takes one of two forms. For object-like macro
13942 definitions, it should be:
13944 <macro name> " " <definition>
13946 For function-like macro definitions, it should be:
13948 <macro name> "() " <definition>
13950 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13952 Spaces may appear only where explicitly indicated, and in the
13955 The Dwarf 2 spec says that an object-like macro's name is always
13956 followed by a space, but versions of GCC around March 2002 omit
13957 the space when the macro's definition is the empty string.
13959 The Dwarf 2 spec says that there should be no spaces between the
13960 formal arguments in a function-like macro's formal argument list,
13961 but versions of GCC around March 2002 include spaces after the
13965 /* Find the extent of the macro name. The macro name is terminated
13966 by either a space or null character (for an object-like macro) or
13967 an opening paren (for a function-like macro). */
13968 for (p
= body
; *p
; p
++)
13969 if (*p
== ' ' || *p
== '(')
13972 if (*p
== ' ' || *p
== '\0')
13974 /* It's an object-like macro. */
13975 int name_len
= p
- body
;
13976 char *name
= copy_string (body
, name_len
);
13977 const char *replacement
;
13980 replacement
= body
+ name_len
+ 1;
13983 dwarf2_macro_malformed_definition_complaint (body
);
13984 replacement
= body
+ name_len
;
13987 macro_define_object (file
, line
, name
, replacement
);
13991 else if (*p
== '(')
13993 /* It's a function-like macro. */
13994 char *name
= copy_string (body
, p
- body
);
13997 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
14001 p
= consume_improper_spaces (p
, body
);
14003 /* Parse the formal argument list. */
14004 while (*p
&& *p
!= ')')
14006 /* Find the extent of the current argument name. */
14007 const char *arg_start
= p
;
14009 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
14012 if (! *p
|| p
== arg_start
)
14013 dwarf2_macro_malformed_definition_complaint (body
);
14016 /* Make sure argv has room for the new argument. */
14017 if (argc
>= argv_size
)
14020 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
14023 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
14026 p
= consume_improper_spaces (p
, body
);
14028 /* Consume the comma, if present. */
14033 p
= consume_improper_spaces (p
, body
);
14042 /* Perfectly formed definition, no complaints. */
14043 macro_define_function (file
, line
, name
,
14044 argc
, (const char **) argv
,
14046 else if (*p
== '\0')
14048 /* Complain, but do define it. */
14049 dwarf2_macro_malformed_definition_complaint (body
);
14050 macro_define_function (file
, line
, name
,
14051 argc
, (const char **) argv
,
14055 /* Just complain. */
14056 dwarf2_macro_malformed_definition_complaint (body
);
14059 /* Just complain. */
14060 dwarf2_macro_malformed_definition_complaint (body
);
14066 for (i
= 0; i
< argc
; i
++)
14072 dwarf2_macro_malformed_definition_complaint (body
);
14077 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
14078 char *comp_dir
, bfd
*abfd
,
14079 struct dwarf2_cu
*cu
)
14081 gdb_byte
*mac_ptr
, *mac_end
;
14082 struct macro_source_file
*current_file
= 0;
14083 enum dwarf_macinfo_record_type macinfo_type
;
14084 int at_commandline
;
14086 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14087 &dwarf2_per_objfile
->macinfo
);
14088 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
14090 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
14094 /* First pass: Find the name of the base filename.
14095 This filename is needed in order to process all macros whose definition
14096 (or undefinition) comes from the command line. These macros are defined
14097 before the first DW_MACINFO_start_file entry, and yet still need to be
14098 associated to the base file.
14100 To determine the base file name, we scan the macro definitions until we
14101 reach the first DW_MACINFO_start_file entry. We then initialize
14102 CURRENT_FILE accordingly so that any macro definition found before the
14103 first DW_MACINFO_start_file can still be associated to the base file. */
14105 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14106 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
14107 + dwarf2_per_objfile
->macinfo
.size
;
14111 /* Do we at least have room for a macinfo type byte? */
14112 if (mac_ptr
>= mac_end
)
14114 /* Complaint is printed during the second pass as GDB will probably
14115 stop the first pass earlier upon finding
14116 DW_MACINFO_start_file. */
14120 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14123 switch (macinfo_type
)
14125 /* A zero macinfo type indicates the end of the macro
14130 case DW_MACINFO_define
:
14131 case DW_MACINFO_undef
:
14132 /* Only skip the data by MAC_PTR. */
14134 unsigned int bytes_read
;
14136 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14137 mac_ptr
+= bytes_read
;
14138 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14139 mac_ptr
+= bytes_read
;
14143 case DW_MACINFO_start_file
:
14145 unsigned int bytes_read
;
14148 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14149 mac_ptr
+= bytes_read
;
14150 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14151 mac_ptr
+= bytes_read
;
14153 current_file
= macro_start_file (file
, line
, current_file
,
14154 comp_dir
, lh
, cu
->objfile
);
14158 case DW_MACINFO_end_file
:
14159 /* No data to skip by MAC_PTR. */
14162 case DW_MACINFO_vendor_ext
:
14163 /* Only skip the data by MAC_PTR. */
14165 unsigned int bytes_read
;
14167 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14168 mac_ptr
+= bytes_read
;
14169 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14170 mac_ptr
+= bytes_read
;
14177 } while (macinfo_type
!= 0 && current_file
== NULL
);
14179 /* Second pass: Process all entries.
14181 Use the AT_COMMAND_LINE flag to determine whether we are still processing
14182 command-line macro definitions/undefinitions. This flag is unset when we
14183 reach the first DW_MACINFO_start_file entry. */
14185 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14187 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
14188 GDB is still reading the definitions from command line. First
14189 DW_MACINFO_start_file will need to be ignored as it was already executed
14190 to create CURRENT_FILE for the main source holding also the command line
14191 definitions. On first met DW_MACINFO_start_file this flag is reset to
14192 normally execute all the remaining DW_MACINFO_start_file macinfos. */
14194 at_commandline
= 1;
14198 /* Do we at least have room for a macinfo type byte? */
14199 if (mac_ptr
>= mac_end
)
14201 dwarf2_macros_too_long_complaint ();
14205 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14208 switch (macinfo_type
)
14210 /* A zero macinfo type indicates the end of the macro
14215 case DW_MACINFO_define
:
14216 case DW_MACINFO_undef
:
14218 unsigned int bytes_read
;
14222 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14223 mac_ptr
+= bytes_read
;
14224 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14225 mac_ptr
+= bytes_read
;
14227 if (! current_file
)
14229 /* DWARF violation as no main source is present. */
14230 complaint (&symfile_complaints
,
14231 _("debug info with no main source gives macro %s "
14233 macinfo_type
== DW_MACINFO_define
?
14235 macinfo_type
== DW_MACINFO_undef
?
14236 _("undefinition") :
14237 _("something-or-other"), line
, body
);
14240 if ((line
== 0 && !at_commandline
)
14241 || (line
!= 0 && at_commandline
))
14242 complaint (&symfile_complaints
,
14243 _("debug info gives %s macro %s with %s line %d: %s"),
14244 at_commandline
? _("command-line") : _("in-file"),
14245 macinfo_type
== DW_MACINFO_define
?
14247 macinfo_type
== DW_MACINFO_undef
?
14248 _("undefinition") :
14249 _("something-or-other"),
14250 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
14252 if (macinfo_type
== DW_MACINFO_define
)
14253 parse_macro_definition (current_file
, line
, body
);
14254 else if (macinfo_type
== DW_MACINFO_undef
)
14255 macro_undef (current_file
, line
, body
);
14259 case DW_MACINFO_start_file
:
14261 unsigned int bytes_read
;
14264 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14265 mac_ptr
+= bytes_read
;
14266 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14267 mac_ptr
+= bytes_read
;
14269 if ((line
== 0 && !at_commandline
)
14270 || (line
!= 0 && at_commandline
))
14271 complaint (&symfile_complaints
,
14272 _("debug info gives source %d included "
14273 "from %s at %s line %d"),
14274 file
, at_commandline
? _("command-line") : _("file"),
14275 line
== 0 ? _("zero") : _("non-zero"), line
);
14277 if (at_commandline
)
14279 /* This DW_MACINFO_start_file was executed in the pass one. */
14280 at_commandline
= 0;
14283 current_file
= macro_start_file (file
, line
,
14284 current_file
, comp_dir
,
14289 case DW_MACINFO_end_file
:
14290 if (! current_file
)
14291 complaint (&symfile_complaints
,
14292 _("macro debug info has an unmatched "
14293 "`close_file' directive"));
14296 current_file
= current_file
->included_by
;
14297 if (! current_file
)
14299 enum dwarf_macinfo_record_type next_type
;
14301 /* GCC circa March 2002 doesn't produce the zero
14302 type byte marking the end of the compilation
14303 unit. Complain if it's not there, but exit no
14306 /* Do we at least have room for a macinfo type byte? */
14307 if (mac_ptr
>= mac_end
)
14309 dwarf2_macros_too_long_complaint ();
14313 /* We don't increment mac_ptr here, so this is just
14315 next_type
= read_1_byte (abfd
, mac_ptr
);
14316 if (next_type
!= 0)
14317 complaint (&symfile_complaints
,
14318 _("no terminating 0-type entry for "
14319 "macros in `.debug_macinfo' section"));
14326 case DW_MACINFO_vendor_ext
:
14328 unsigned int bytes_read
;
14332 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14333 mac_ptr
+= bytes_read
;
14334 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14335 mac_ptr
+= bytes_read
;
14337 /* We don't recognize any vendor extensions. */
14341 } while (macinfo_type
!= 0);
14344 /* Check if the attribute's form is a DW_FORM_block*
14345 if so return true else false. */
14347 attr_form_is_block (struct attribute
*attr
)
14349 return (attr
== NULL
? 0 :
14350 attr
->form
== DW_FORM_block1
14351 || attr
->form
== DW_FORM_block2
14352 || attr
->form
== DW_FORM_block4
14353 || attr
->form
== DW_FORM_block
14354 || attr
->form
== DW_FORM_exprloc
);
14357 /* Return non-zero if ATTR's value is a section offset --- classes
14358 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
14359 You may use DW_UNSND (attr) to retrieve such offsets.
14361 Section 7.5.4, "Attribute Encodings", explains that no attribute
14362 may have a value that belongs to more than one of these classes; it
14363 would be ambiguous if we did, because we use the same forms for all
14366 attr_form_is_section_offset (struct attribute
*attr
)
14368 return (attr
->form
== DW_FORM_data4
14369 || attr
->form
== DW_FORM_data8
14370 || attr
->form
== DW_FORM_sec_offset
);
14374 /* Return non-zero if ATTR's value falls in the 'constant' class, or
14375 zero otherwise. When this function returns true, you can apply
14376 dwarf2_get_attr_constant_value to it.
14378 However, note that for some attributes you must check
14379 attr_form_is_section_offset before using this test. DW_FORM_data4
14380 and DW_FORM_data8 are members of both the constant class, and of
14381 the classes that contain offsets into other debug sections
14382 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
14383 that, if an attribute's can be either a constant or one of the
14384 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
14385 taken as section offsets, not constants. */
14387 attr_form_is_constant (struct attribute
*attr
)
14389 switch (attr
->form
)
14391 case DW_FORM_sdata
:
14392 case DW_FORM_udata
:
14393 case DW_FORM_data1
:
14394 case DW_FORM_data2
:
14395 case DW_FORM_data4
:
14396 case DW_FORM_data8
:
14403 /* A helper function that fills in a dwarf2_loclist_baton. */
14406 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
14407 struct dwarf2_loclist_baton
*baton
,
14408 struct attribute
*attr
)
14410 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14411 &dwarf2_per_objfile
->loc
);
14413 baton
->per_cu
= cu
->per_cu
;
14414 gdb_assert (baton
->per_cu
);
14415 /* We don't know how long the location list is, but make sure we
14416 don't run off the edge of the section. */
14417 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
14418 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
14419 baton
->base_address
= cu
->base_address
;
14423 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
14424 struct dwarf2_cu
*cu
)
14426 if (attr_form_is_section_offset (attr
)
14427 /* ".debug_loc" may not exist at all, or the offset may be outside
14428 the section. If so, fall through to the complaint in the
14430 && DW_UNSND (attr
) < dwarf2_section_size (dwarf2_per_objfile
->objfile
,
14431 &dwarf2_per_objfile
->loc
))
14433 struct dwarf2_loclist_baton
*baton
;
14435 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14436 sizeof (struct dwarf2_loclist_baton
));
14438 fill_in_loclist_baton (cu
, baton
, attr
);
14440 if (cu
->base_known
== 0)
14441 complaint (&symfile_complaints
,
14442 _("Location list used without "
14443 "specifying the CU base address."));
14445 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
14446 SYMBOL_LOCATION_BATON (sym
) = baton
;
14450 struct dwarf2_locexpr_baton
*baton
;
14452 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14453 sizeof (struct dwarf2_locexpr_baton
));
14454 baton
->per_cu
= cu
->per_cu
;
14455 gdb_assert (baton
->per_cu
);
14457 if (attr_form_is_block (attr
))
14459 /* Note that we're just copying the block's data pointer
14460 here, not the actual data. We're still pointing into the
14461 info_buffer for SYM's objfile; right now we never release
14462 that buffer, but when we do clean up properly this may
14464 baton
->size
= DW_BLOCK (attr
)->size
;
14465 baton
->data
= DW_BLOCK (attr
)->data
;
14469 dwarf2_invalid_attrib_class_complaint ("location description",
14470 SYMBOL_NATURAL_NAME (sym
));
14472 baton
->data
= NULL
;
14475 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14476 SYMBOL_LOCATION_BATON (sym
) = baton
;
14480 /* Return the OBJFILE associated with the compilation unit CU. If CU
14481 came from a separate debuginfo file, then the master objfile is
14485 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
14487 struct objfile
*objfile
= per_cu
->objfile
;
14489 /* Return the master objfile, so that we can report and look up the
14490 correct file containing this variable. */
14491 if (objfile
->separate_debug_objfile_backlink
)
14492 objfile
= objfile
->separate_debug_objfile_backlink
;
14497 /* Return the address size given in the compilation unit header for CU. */
14500 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14503 return per_cu
->cu
->header
.addr_size
;
14506 /* If the CU is not currently read in, we re-read its header. */
14507 struct objfile
*objfile
= per_cu
->objfile
;
14508 struct dwarf2_per_objfile
*per_objfile
14509 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14510 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14511 struct comp_unit_head cu_header
;
14513 memset (&cu_header
, 0, sizeof cu_header
);
14514 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14515 return cu_header
.addr_size
;
14519 /* Return the offset size given in the compilation unit header for CU. */
14522 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14525 return per_cu
->cu
->header
.offset_size
;
14528 /* If the CU is not currently read in, we re-read its header. */
14529 struct objfile
*objfile
= per_cu
->objfile
;
14530 struct dwarf2_per_objfile
*per_objfile
14531 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14532 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14533 struct comp_unit_head cu_header
;
14535 memset (&cu_header
, 0, sizeof cu_header
);
14536 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14537 return cu_header
.offset_size
;
14541 /* Return the text offset of the CU. The returned offset comes from
14542 this CU's objfile. If this objfile came from a separate debuginfo
14543 file, then the offset may be different from the corresponding
14544 offset in the parent objfile. */
14547 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14549 struct objfile
*objfile
= per_cu
->objfile
;
14551 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14554 /* Locate the .debug_info compilation unit from CU's objfile which contains
14555 the DIE at OFFSET. Raises an error on failure. */
14557 static struct dwarf2_per_cu_data
*
14558 dwarf2_find_containing_comp_unit (unsigned int offset
,
14559 struct objfile
*objfile
)
14561 struct dwarf2_per_cu_data
*this_cu
;
14565 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14568 int mid
= low
+ (high
- low
) / 2;
14570 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14575 gdb_assert (low
== high
);
14576 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14579 error (_("Dwarf Error: could not find partial DIE containing "
14580 "offset 0x%lx [in module %s]"),
14581 (long) offset
, bfd_get_filename (objfile
->obfd
));
14583 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14584 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14588 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14589 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14590 && offset
>= this_cu
->offset
+ this_cu
->length
)
14591 error (_("invalid dwarf2 offset %u"), offset
);
14592 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14597 /* Locate the compilation unit from OBJFILE which is located at exactly
14598 OFFSET. Raises an error on failure. */
14600 static struct dwarf2_per_cu_data
*
14601 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14603 struct dwarf2_per_cu_data
*this_cu
;
14605 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14606 if (this_cu
->offset
!= offset
)
14607 error (_("no compilation unit with offset %u."), offset
);
14611 /* Initialize dwarf2_cu CU for OBJFILE in a pre-allocated space. */
14614 init_one_comp_unit (struct dwarf2_cu
*cu
, struct objfile
*objfile
)
14616 memset (cu
, 0, sizeof (*cu
));
14617 cu
->objfile
= objfile
;
14618 obstack_init (&cu
->comp_unit_obstack
);
14621 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
14624 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
14626 struct attribute
*attr
;
14628 /* Set the language we're debugging. */
14629 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
14631 set_cu_language (DW_UNSND (attr
), cu
);
14633 set_cu_language (language_minimal
, cu
);
14636 /* Release one cached compilation unit, CU. We unlink it from the tree
14637 of compilation units, but we don't remove it from the read_in_chain;
14638 the caller is responsible for that.
14639 NOTE: DATA is a void * because this function is also used as a
14640 cleanup routine. */
14643 free_one_comp_unit (void *data
)
14645 struct dwarf2_cu
*cu
= data
;
14647 if (cu
->per_cu
!= NULL
)
14648 cu
->per_cu
->cu
= NULL
;
14651 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14656 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14657 when we're finished with it. We can't free the pointer itself, but be
14658 sure to unlink it from the cache. Also release any associated storage
14659 and perform cache maintenance.
14661 Only used during partial symbol parsing. */
14664 free_stack_comp_unit (void *data
)
14666 struct dwarf2_cu
*cu
= data
;
14668 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14669 cu
->partial_dies
= NULL
;
14671 if (cu
->per_cu
!= NULL
)
14673 /* This compilation unit is on the stack in our caller, so we
14674 should not xfree it. Just unlink it. */
14675 cu
->per_cu
->cu
= NULL
;
14678 /* If we had a per-cu pointer, then we may have other compilation
14679 units loaded, so age them now. */
14680 age_cached_comp_units ();
14684 /* Free all cached compilation units. */
14687 free_cached_comp_units (void *data
)
14689 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14691 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14692 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14693 while (per_cu
!= NULL
)
14695 struct dwarf2_per_cu_data
*next_cu
;
14697 next_cu
= per_cu
->cu
->read_in_chain
;
14699 free_one_comp_unit (per_cu
->cu
);
14700 *last_chain
= next_cu
;
14706 /* Increase the age counter on each cached compilation unit, and free
14707 any that are too old. */
14710 age_cached_comp_units (void)
14712 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14714 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14715 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14716 while (per_cu
!= NULL
)
14718 per_cu
->cu
->last_used
++;
14719 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14720 dwarf2_mark (per_cu
->cu
);
14721 per_cu
= per_cu
->cu
->read_in_chain
;
14724 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14725 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14726 while (per_cu
!= NULL
)
14728 struct dwarf2_per_cu_data
*next_cu
;
14730 next_cu
= per_cu
->cu
->read_in_chain
;
14732 if (!per_cu
->cu
->mark
)
14734 free_one_comp_unit (per_cu
->cu
);
14735 *last_chain
= next_cu
;
14738 last_chain
= &per_cu
->cu
->read_in_chain
;
14744 /* Remove a single compilation unit from the cache. */
14747 free_one_cached_comp_unit (void *target_cu
)
14749 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14751 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14752 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14753 while (per_cu
!= NULL
)
14755 struct dwarf2_per_cu_data
*next_cu
;
14757 next_cu
= per_cu
->cu
->read_in_chain
;
14759 if (per_cu
->cu
== target_cu
)
14761 free_one_comp_unit (per_cu
->cu
);
14762 *last_chain
= next_cu
;
14766 last_chain
= &per_cu
->cu
->read_in_chain
;
14772 /* Release all extra memory associated with OBJFILE. */
14775 dwarf2_free_objfile (struct objfile
*objfile
)
14777 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14779 if (dwarf2_per_objfile
== NULL
)
14782 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14783 free_cached_comp_units (NULL
);
14785 if (dwarf2_per_objfile
->quick_file_names_table
)
14786 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
14788 /* Everything else should be on the objfile obstack. */
14791 /* A pair of DIE offset and GDB type pointer. We store these
14792 in a hash table separate from the DIEs, and preserve them
14793 when the DIEs are flushed out of cache. */
14795 struct dwarf2_offset_and_type
14797 unsigned int offset
;
14801 /* Hash function for a dwarf2_offset_and_type. */
14804 offset_and_type_hash (const void *item
)
14806 const struct dwarf2_offset_and_type
*ofs
= item
;
14808 return ofs
->offset
;
14811 /* Equality function for a dwarf2_offset_and_type. */
14814 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14816 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14817 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14819 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14822 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14823 table if necessary. For convenience, return TYPE.
14825 The DIEs reading must have careful ordering to:
14826 * Not cause infite loops trying to read in DIEs as a prerequisite for
14827 reading current DIE.
14828 * Not trying to dereference contents of still incompletely read in types
14829 while reading in other DIEs.
14830 * Enable referencing still incompletely read in types just by a pointer to
14831 the type without accessing its fields.
14833 Therefore caller should follow these rules:
14834 * Try to fetch any prerequisite types we may need to build this DIE type
14835 before building the type and calling set_die_type.
14836 * After building type call set_die_type for current DIE as soon as
14837 possible before fetching more types to complete the current type.
14838 * Make the type as complete as possible before fetching more types. */
14840 static struct type
*
14841 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14843 struct dwarf2_offset_and_type
**slot
, ofs
;
14844 struct objfile
*objfile
= cu
->objfile
;
14845 htab_t
*type_hash_ptr
;
14847 /* For Ada types, make sure that the gnat-specific data is always
14848 initialized (if not already set). There are a few types where
14849 we should not be doing so, because the type-specific area is
14850 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14851 where the type-specific area is used to store the floatformat).
14852 But this is not a problem, because the gnat-specific information
14853 is actually not needed for these types. */
14854 if (need_gnat_info (cu
)
14855 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14856 && TYPE_CODE (type
) != TYPE_CODE_FLT
14857 && !HAVE_GNAT_AUX_INFO (type
))
14858 INIT_GNAT_SPECIFIC (type
);
14860 if (cu
->per_cu
->from_debug_types
)
14861 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14863 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14865 if (*type_hash_ptr
== NULL
)
14868 = htab_create_alloc_ex (127,
14869 offset_and_type_hash
,
14870 offset_and_type_eq
,
14872 &objfile
->objfile_obstack
,
14873 hashtab_obstack_allocate
,
14874 dummy_obstack_deallocate
);
14877 ofs
.offset
= die
->offset
;
14879 slot
= (struct dwarf2_offset_and_type
**)
14880 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14882 complaint (&symfile_complaints
,
14883 _("A problem internal to GDB: DIE 0x%x has type already set"),
14885 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14890 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14891 table, or return NULL if the die does not have a saved type. */
14893 static struct type
*
14894 get_die_type_at_offset (unsigned int offset
,
14895 struct dwarf2_per_cu_data
*per_cu
)
14897 struct dwarf2_offset_and_type
*slot
, ofs
;
14900 if (per_cu
->from_debug_types
)
14901 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14903 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14904 if (type_hash
== NULL
)
14907 ofs
.offset
= offset
;
14908 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14915 /* Look up the type for DIE in the appropriate type_hash table,
14916 or return NULL if DIE does not have a saved type. */
14918 static struct type
*
14919 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14921 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14924 /* Add a dependence relationship from CU to REF_PER_CU. */
14927 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14928 struct dwarf2_per_cu_data
*ref_per_cu
)
14932 if (cu
->dependencies
== NULL
)
14934 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14935 NULL
, &cu
->comp_unit_obstack
,
14936 hashtab_obstack_allocate
,
14937 dummy_obstack_deallocate
);
14939 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14941 *slot
= ref_per_cu
;
14944 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14945 Set the mark field in every compilation unit in the
14946 cache that we must keep because we are keeping CU. */
14949 dwarf2_mark_helper (void **slot
, void *data
)
14951 struct dwarf2_per_cu_data
*per_cu
;
14953 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14954 if (per_cu
->cu
->mark
)
14956 per_cu
->cu
->mark
= 1;
14958 if (per_cu
->cu
->dependencies
!= NULL
)
14959 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14964 /* Set the mark field in CU and in every other compilation unit in the
14965 cache that we must keep because we are keeping CU. */
14968 dwarf2_mark (struct dwarf2_cu
*cu
)
14973 if (cu
->dependencies
!= NULL
)
14974 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14978 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14982 per_cu
->cu
->mark
= 0;
14983 per_cu
= per_cu
->cu
->read_in_chain
;
14987 /* Trivial hash function for partial_die_info: the hash value of a DIE
14988 is its offset in .debug_info for this objfile. */
14991 partial_die_hash (const void *item
)
14993 const struct partial_die_info
*part_die
= item
;
14995 return part_die
->offset
;
14998 /* Trivial comparison function for partial_die_info structures: two DIEs
14999 are equal if they have the same offset. */
15002 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
15004 const struct partial_die_info
*part_die_lhs
= item_lhs
;
15005 const struct partial_die_info
*part_die_rhs
= item_rhs
;
15007 return part_die_lhs
->offset
== part_die_rhs
->offset
;
15010 static struct cmd_list_element
*set_dwarf2_cmdlist
;
15011 static struct cmd_list_element
*show_dwarf2_cmdlist
;
15014 set_dwarf2_cmd (char *args
, int from_tty
)
15016 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
15020 show_dwarf2_cmd (char *args
, int from_tty
)
15022 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
15025 /* If section described by INFO was mmapped, munmap it now. */
15028 munmap_section_buffer (struct dwarf2_section_info
*info
)
15030 if (info
->was_mmapped
)
15033 intptr_t begin
= (intptr_t) info
->buffer
;
15034 intptr_t map_begin
= begin
& ~(pagesize
- 1);
15035 size_t map_length
= info
->size
+ begin
- map_begin
;
15037 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
15039 /* Without HAVE_MMAP, we should never be here to begin with. */
15040 gdb_assert_not_reached ("no mmap support");
15045 /* munmap debug sections for OBJFILE, if necessary. */
15048 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
15050 struct dwarf2_per_objfile
*data
= d
;
15052 /* This is sorted according to the order they're defined in to make it easier
15053 to keep in sync. */
15054 munmap_section_buffer (&data
->info
);
15055 munmap_section_buffer (&data
->abbrev
);
15056 munmap_section_buffer (&data
->line
);
15057 munmap_section_buffer (&data
->loc
);
15058 munmap_section_buffer (&data
->macinfo
);
15059 munmap_section_buffer (&data
->str
);
15060 munmap_section_buffer (&data
->ranges
);
15061 munmap_section_buffer (&data
->types
);
15062 munmap_section_buffer (&data
->frame
);
15063 munmap_section_buffer (&data
->eh_frame
);
15064 munmap_section_buffer (&data
->gdb_index
);
15068 /* The "save gdb-index" command. */
15070 /* The contents of the hash table we create when building the string
15072 struct strtab_entry
15074 offset_type offset
;
15078 /* Hash function for a strtab_entry. */
15081 hash_strtab_entry (const void *e
)
15083 const struct strtab_entry
*entry
= e
;
15084 return mapped_index_string_hash (entry
->str
);
15087 /* Equality function for a strtab_entry. */
15090 eq_strtab_entry (const void *a
, const void *b
)
15092 const struct strtab_entry
*ea
= a
;
15093 const struct strtab_entry
*eb
= b
;
15094 return !strcmp (ea
->str
, eb
->str
);
15097 /* Create a strtab_entry hash table. */
15100 create_strtab (void)
15102 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
15103 xfree
, xcalloc
, xfree
);
15106 /* Add a string to the constant pool. Return the string's offset in
15110 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
15113 struct strtab_entry entry
;
15114 struct strtab_entry
*result
;
15117 slot
= htab_find_slot (table
, &entry
, INSERT
);
15122 result
= XNEW (struct strtab_entry
);
15123 result
->offset
= obstack_object_size (cpool
);
15125 obstack_grow_str0 (cpool
, str
);
15128 return result
->offset
;
15131 /* An entry in the symbol table. */
15132 struct symtab_index_entry
15134 /* The name of the symbol. */
15136 /* The offset of the name in the constant pool. */
15137 offset_type index_offset
;
15138 /* A sorted vector of the indices of all the CUs that hold an object
15140 VEC (offset_type
) *cu_indices
;
15143 /* The symbol table. This is a power-of-2-sized hash table. */
15144 struct mapped_symtab
15146 offset_type n_elements
;
15148 struct symtab_index_entry
**data
;
15151 /* Hash function for a symtab_index_entry. */
15154 hash_symtab_entry (const void *e
)
15156 const struct symtab_index_entry
*entry
= e
;
15157 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
15158 sizeof (offset_type
) * VEC_length (offset_type
,
15159 entry
->cu_indices
),
15163 /* Equality function for a symtab_index_entry. */
15166 eq_symtab_entry (const void *a
, const void *b
)
15168 const struct symtab_index_entry
*ea
= a
;
15169 const struct symtab_index_entry
*eb
= b
;
15170 int len
= VEC_length (offset_type
, ea
->cu_indices
);
15171 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
15173 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
15174 VEC_address (offset_type
, eb
->cu_indices
),
15175 sizeof (offset_type
) * len
);
15178 /* Destroy a symtab_index_entry. */
15181 delete_symtab_entry (void *p
)
15183 struct symtab_index_entry
*entry
= p
;
15184 VEC_free (offset_type
, entry
->cu_indices
);
15188 /* Create a hash table holding symtab_index_entry objects. */
15191 create_symbol_hash_table (void)
15193 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
15194 delete_symtab_entry
, xcalloc
, xfree
);
15197 /* Create a new mapped symtab object. */
15199 static struct mapped_symtab
*
15200 create_mapped_symtab (void)
15202 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
15203 symtab
->n_elements
= 0;
15204 symtab
->size
= 1024;
15205 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15209 /* Destroy a mapped_symtab. */
15212 cleanup_mapped_symtab (void *p
)
15214 struct mapped_symtab
*symtab
= p
;
15215 /* The contents of the array are freed when the other hash table is
15217 xfree (symtab
->data
);
15221 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
15224 static struct symtab_index_entry
**
15225 find_slot (struct mapped_symtab
*symtab
, const char *name
)
15227 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
15229 index
= hash
& (symtab
->size
- 1);
15230 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
15234 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
15235 return &symtab
->data
[index
];
15236 index
= (index
+ step
) & (symtab
->size
- 1);
15240 /* Expand SYMTAB's hash table. */
15243 hash_expand (struct mapped_symtab
*symtab
)
15245 offset_type old_size
= symtab
->size
;
15247 struct symtab_index_entry
**old_entries
= symtab
->data
;
15250 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15252 for (i
= 0; i
< old_size
; ++i
)
15254 if (old_entries
[i
])
15256 struct symtab_index_entry
**slot
= find_slot (symtab
,
15257 old_entries
[i
]->name
);
15258 *slot
= old_entries
[i
];
15262 xfree (old_entries
);
15265 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
15266 is the index of the CU in which the symbol appears. */
15269 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
15270 offset_type cu_index
)
15272 struct symtab_index_entry
**slot
;
15274 ++symtab
->n_elements
;
15275 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
15276 hash_expand (symtab
);
15278 slot
= find_slot (symtab
, name
);
15281 *slot
= XNEW (struct symtab_index_entry
);
15282 (*slot
)->name
= name
;
15283 (*slot
)->cu_indices
= NULL
;
15285 /* Don't push an index twice. Due to how we add entries we only
15286 have to check the last one. */
15287 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
15288 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
15289 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
15292 /* Add a vector of indices to the constant pool. */
15295 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
15296 struct symtab_index_entry
*entry
)
15300 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
15303 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
15304 offset_type val
= MAYBE_SWAP (len
);
15309 entry
->index_offset
= obstack_object_size (cpool
);
15311 obstack_grow (cpool
, &val
, sizeof (val
));
15313 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
15316 val
= MAYBE_SWAP (iter
);
15317 obstack_grow (cpool
, &val
, sizeof (val
));
15322 struct symtab_index_entry
*old_entry
= *slot
;
15323 entry
->index_offset
= old_entry
->index_offset
;
15326 return entry
->index_offset
;
15329 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
15330 constant pool entries going into the obstack CPOOL. */
15333 write_hash_table (struct mapped_symtab
*symtab
,
15334 struct obstack
*output
, struct obstack
*cpool
)
15337 htab_t symbol_hash_table
;
15340 symbol_hash_table
= create_symbol_hash_table ();
15341 str_table
= create_strtab ();
15343 /* We add all the index vectors to the constant pool first, to
15344 ensure alignment is ok. */
15345 for (i
= 0; i
< symtab
->size
; ++i
)
15347 if (symtab
->data
[i
])
15348 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
15351 /* Now write out the hash table. */
15352 for (i
= 0; i
< symtab
->size
; ++i
)
15354 offset_type str_off
, vec_off
;
15356 if (symtab
->data
[i
])
15358 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
15359 vec_off
= symtab
->data
[i
]->index_offset
;
15363 /* While 0 is a valid constant pool index, it is not valid
15364 to have 0 for both offsets. */
15369 str_off
= MAYBE_SWAP (str_off
);
15370 vec_off
= MAYBE_SWAP (vec_off
);
15372 obstack_grow (output
, &str_off
, sizeof (str_off
));
15373 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
15376 htab_delete (str_table
);
15377 htab_delete (symbol_hash_table
);
15380 /* Struct to map psymtab to CU index in the index file. */
15381 struct psymtab_cu_index_map
15383 struct partial_symtab
*psymtab
;
15384 unsigned int cu_index
;
15388 hash_psymtab_cu_index (const void *item
)
15390 const struct psymtab_cu_index_map
*map
= item
;
15392 return htab_hash_pointer (map
->psymtab
);
15396 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
15398 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
15399 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
15401 return lhs
->psymtab
== rhs
->psymtab
;
15404 /* Helper struct for building the address table. */
15405 struct addrmap_index_data
15407 struct objfile
*objfile
;
15408 struct obstack
*addr_obstack
;
15409 htab_t cu_index_htab
;
15411 /* Non-zero if the previous_* fields are valid.
15412 We can't write an entry until we see the next entry (since it is only then
15413 that we know the end of the entry). */
15414 int previous_valid
;
15415 /* Index of the CU in the table of all CUs in the index file. */
15416 unsigned int previous_cu_index
;
15417 /* Start address of the CU. */
15418 CORE_ADDR previous_cu_start
;
15421 /* Write an address entry to OBSTACK. */
15424 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
15425 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
15427 offset_type cu_index_to_write
;
15429 CORE_ADDR baseaddr
;
15431 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15433 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
15434 obstack_grow (obstack
, addr
, 8);
15435 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
15436 obstack_grow (obstack
, addr
, 8);
15437 cu_index_to_write
= MAYBE_SWAP (cu_index
);
15438 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
15441 /* Worker function for traversing an addrmap to build the address table. */
15444 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
15446 struct addrmap_index_data
*data
= datap
;
15447 struct partial_symtab
*pst
= obj
;
15448 offset_type cu_index
;
15451 if (data
->previous_valid
)
15452 add_address_entry (data
->objfile
, data
->addr_obstack
,
15453 data
->previous_cu_start
, start_addr
,
15454 data
->previous_cu_index
);
15456 data
->previous_cu_start
= start_addr
;
15459 struct psymtab_cu_index_map find_map
, *map
;
15460 find_map
.psymtab
= pst
;
15461 map
= htab_find (data
->cu_index_htab
, &find_map
);
15462 gdb_assert (map
!= NULL
);
15463 data
->previous_cu_index
= map
->cu_index
;
15464 data
->previous_valid
= 1;
15467 data
->previous_valid
= 0;
15472 /* Write OBJFILE's address map to OBSTACK.
15473 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
15474 in the index file. */
15477 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
15478 htab_t cu_index_htab
)
15480 struct addrmap_index_data addrmap_index_data
;
15482 /* When writing the address table, we have to cope with the fact that
15483 the addrmap iterator only provides the start of a region; we have to
15484 wait until the next invocation to get the start of the next region. */
15486 addrmap_index_data
.objfile
= objfile
;
15487 addrmap_index_data
.addr_obstack
= obstack
;
15488 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
15489 addrmap_index_data
.previous_valid
= 0;
15491 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
15492 &addrmap_index_data
);
15494 /* It's highly unlikely the last entry (end address = 0xff...ff)
15495 is valid, but we should still handle it.
15496 The end address is recorded as the start of the next region, but that
15497 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
15499 if (addrmap_index_data
.previous_valid
)
15500 add_address_entry (objfile
, obstack
,
15501 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
15502 addrmap_index_data
.previous_cu_index
);
15505 /* Add a list of partial symbols to SYMTAB. */
15508 write_psymbols (struct mapped_symtab
*symtab
,
15510 struct partial_symbol
**psymp
,
15512 offset_type cu_index
,
15515 for (; count
-- > 0; ++psymp
)
15517 void **slot
, *lookup
;
15519 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
15520 error (_("Ada is not currently supported by the index"));
15522 /* We only want to add a given psymbol once. However, we also
15523 want to account for whether it is global or static. So, we
15524 may add it twice, using slightly different values. */
15527 uintptr_t val
= 1 | (uintptr_t) *psymp
;
15529 lookup
= (void *) val
;
15534 /* Only add a given psymbol once. */
15535 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
15539 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
15544 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
15545 exception if there is an error. */
15548 write_obstack (FILE *file
, struct obstack
*obstack
)
15550 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
15552 != obstack_object_size (obstack
))
15553 error (_("couldn't data write to file"));
15556 /* Unlink a file if the argument is not NULL. */
15559 unlink_if_set (void *p
)
15561 char **filename
= p
;
15563 unlink (*filename
);
15566 /* A helper struct used when iterating over debug_types. */
15567 struct signatured_type_index_data
15569 struct objfile
*objfile
;
15570 struct mapped_symtab
*symtab
;
15571 struct obstack
*types_list
;
15576 /* A helper function that writes a single signatured_type to an
15580 write_one_signatured_type (void **slot
, void *d
)
15582 struct signatured_type_index_data
*info
= d
;
15583 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
15584 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
15585 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15588 write_psymbols (info
->symtab
,
15590 info
->objfile
->global_psymbols
.list
15591 + psymtab
->globals_offset
,
15592 psymtab
->n_global_syms
, info
->cu_index
,
15594 write_psymbols (info
->symtab
,
15596 info
->objfile
->static_psymbols
.list
15597 + psymtab
->statics_offset
,
15598 psymtab
->n_static_syms
, info
->cu_index
,
15601 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
15602 obstack_grow (info
->types_list
, val
, 8);
15603 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
15604 obstack_grow (info
->types_list
, val
, 8);
15605 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
15606 obstack_grow (info
->types_list
, val
, 8);
15613 /* A cleanup function for an htab_t. */
15616 cleanup_htab (void *arg
)
15621 /* Create an index file for OBJFILE in the directory DIR. */
15624 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
15626 struct cleanup
*cleanup
;
15627 char *filename
, *cleanup_filename
;
15628 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
15629 struct obstack cu_list
, types_cu_list
;
15632 struct mapped_symtab
*symtab
;
15633 offset_type val
, size_of_contents
, total_len
;
15637 htab_t cu_index_htab
;
15638 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
15640 if (!objfile
->psymtabs
)
15642 if (dwarf2_per_objfile
->using_index
)
15643 error (_("Cannot use an index to create the index"));
15645 if (stat (objfile
->name
, &st
) < 0)
15646 perror_with_name (objfile
->name
);
15648 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15649 INDEX_SUFFIX
, (char *) NULL
);
15650 cleanup
= make_cleanup (xfree
, filename
);
15652 out_file
= fopen (filename
, "wb");
15654 error (_("Can't open `%s' for writing"), filename
);
15656 cleanup_filename
= filename
;
15657 make_cleanup (unlink_if_set
, &cleanup_filename
);
15659 symtab
= create_mapped_symtab ();
15660 make_cleanup (cleanup_mapped_symtab
, symtab
);
15662 obstack_init (&addr_obstack
);
15663 make_cleanup_obstack_free (&addr_obstack
);
15665 obstack_init (&cu_list
);
15666 make_cleanup_obstack_free (&cu_list
);
15668 obstack_init (&types_cu_list
);
15669 make_cleanup_obstack_free (&types_cu_list
);
15671 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
15672 NULL
, xcalloc
, xfree
);
15673 make_cleanup (cleanup_htab
, psyms_seen
);
15675 /* While we're scanning CU's create a table that maps a psymtab pointer
15676 (which is what addrmap records) to its index (which is what is recorded
15677 in the index file). This will later be needed to write the address
15679 cu_index_htab
= htab_create_alloc (100,
15680 hash_psymtab_cu_index
,
15681 eq_psymtab_cu_index
,
15682 NULL
, xcalloc
, xfree
);
15683 make_cleanup (cleanup_htab
, cu_index_htab
);
15684 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
15685 xmalloc (sizeof (struct psymtab_cu_index_map
)
15686 * dwarf2_per_objfile
->n_comp_units
);
15687 make_cleanup (xfree
, psymtab_cu_index_map
);
15689 /* The CU list is already sorted, so we don't need to do additional
15690 work here. Also, the debug_types entries do not appear in
15691 all_comp_units, but only in their own hash table. */
15692 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15694 struct dwarf2_per_cu_data
*per_cu
15695 = dwarf2_per_objfile
->all_comp_units
[i
];
15696 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15698 struct psymtab_cu_index_map
*map
;
15701 write_psymbols (symtab
,
15703 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15704 psymtab
->n_global_syms
, i
,
15706 write_psymbols (symtab
,
15708 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15709 psymtab
->n_static_syms
, i
,
15712 map
= &psymtab_cu_index_map
[i
];
15713 map
->psymtab
= psymtab
;
15715 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
15716 gdb_assert (slot
!= NULL
);
15717 gdb_assert (*slot
== NULL
);
15720 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15721 obstack_grow (&cu_list
, val
, 8);
15722 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15723 obstack_grow (&cu_list
, val
, 8);
15726 /* Dump the address map. */
15727 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
15729 /* Write out the .debug_type entries, if any. */
15730 if (dwarf2_per_objfile
->signatured_types
)
15732 struct signatured_type_index_data sig_data
;
15734 sig_data
.objfile
= objfile
;
15735 sig_data
.symtab
= symtab
;
15736 sig_data
.types_list
= &types_cu_list
;
15737 sig_data
.psyms_seen
= psyms_seen
;
15738 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15739 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15740 write_one_signatured_type
, &sig_data
);
15743 obstack_init (&constant_pool
);
15744 make_cleanup_obstack_free (&constant_pool
);
15745 obstack_init (&symtab_obstack
);
15746 make_cleanup_obstack_free (&symtab_obstack
);
15747 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15749 obstack_init (&contents
);
15750 make_cleanup_obstack_free (&contents
);
15751 size_of_contents
= 6 * sizeof (offset_type
);
15752 total_len
= size_of_contents
;
15754 /* The version number. */
15755 val
= MAYBE_SWAP (4);
15756 obstack_grow (&contents
, &val
, sizeof (val
));
15758 /* The offset of the CU list from the start of the file. */
15759 val
= MAYBE_SWAP (total_len
);
15760 obstack_grow (&contents
, &val
, sizeof (val
));
15761 total_len
+= obstack_object_size (&cu_list
);
15763 /* The offset of the types CU list from the start of the file. */
15764 val
= MAYBE_SWAP (total_len
);
15765 obstack_grow (&contents
, &val
, sizeof (val
));
15766 total_len
+= obstack_object_size (&types_cu_list
);
15768 /* The offset of the address table from the start of the file. */
15769 val
= MAYBE_SWAP (total_len
);
15770 obstack_grow (&contents
, &val
, sizeof (val
));
15771 total_len
+= obstack_object_size (&addr_obstack
);
15773 /* The offset of the symbol table from the start of the file. */
15774 val
= MAYBE_SWAP (total_len
);
15775 obstack_grow (&contents
, &val
, sizeof (val
));
15776 total_len
+= obstack_object_size (&symtab_obstack
);
15778 /* The offset of the constant pool from the start of the file. */
15779 val
= MAYBE_SWAP (total_len
);
15780 obstack_grow (&contents
, &val
, sizeof (val
));
15781 total_len
+= obstack_object_size (&constant_pool
);
15783 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15785 write_obstack (out_file
, &contents
);
15786 write_obstack (out_file
, &cu_list
);
15787 write_obstack (out_file
, &types_cu_list
);
15788 write_obstack (out_file
, &addr_obstack
);
15789 write_obstack (out_file
, &symtab_obstack
);
15790 write_obstack (out_file
, &constant_pool
);
15794 /* We want to keep the file, so we set cleanup_filename to NULL
15795 here. See unlink_if_set. */
15796 cleanup_filename
= NULL
;
15798 do_cleanups (cleanup
);
15801 /* The mapped index file format is designed to be directly mmap()able
15802 on any architecture. In most cases, a datum is represented using a
15803 little-endian 32-bit integer value, called an offset_type. Big
15804 endian machines must byte-swap the values before using them.
15805 Exceptions to this rule are noted. The data is laid out such that
15806 alignment is always respected.
15808 A mapped index consists of several sections.
15810 1. The file header. This is a sequence of values, of offset_type
15811 unless otherwise noted:
15813 [0] The version number, currently 4. Versions 1, 2 and 3 are
15815 [1] The offset, from the start of the file, of the CU list.
15816 [2] The offset, from the start of the file, of the types CU list.
15817 Note that this section can be empty, in which case this offset will
15818 be equal to the next offset.
15819 [3] The offset, from the start of the file, of the address section.
15820 [4] The offset, from the start of the file, of the symbol table.
15821 [5] The offset, from the start of the file, of the constant pool.
15823 2. The CU list. This is a sequence of pairs of 64-bit
15824 little-endian values, sorted by the CU offset. The first element
15825 in each pair is the offset of a CU in the .debug_info section. The
15826 second element in each pair is the length of that CU. References
15827 to a CU elsewhere in the map are done using a CU index, which is
15828 just the 0-based index into this table. Note that if there are
15829 type CUs, then conceptually CUs and type CUs form a single list for
15830 the purposes of CU indices.
15832 3. The types CU list. This is a sequence of triplets of 64-bit
15833 little-endian values. In a triplet, the first value is the CU
15834 offset, the second value is the type offset in the CU, and the
15835 third value is the type signature. The types CU list is not
15838 4. The address section. The address section consists of a sequence
15839 of address entries. Each address entry has three elements.
15840 [0] The low address. This is a 64-bit little-endian value.
15841 [1] The high address. This is a 64-bit little-endian value.
15842 Like DW_AT_high_pc, the value is one byte beyond the end.
15843 [2] The CU index. This is an offset_type value.
15845 5. The symbol table. This is a hash table. The size of the hash
15846 table is always a power of 2. The initial hash and the step are
15847 currently defined by the `find_slot' function.
15849 Each slot in the hash table consists of a pair of offset_type
15850 values. The first value is the offset of the symbol's name in the
15851 constant pool. The second value is the offset of the CU vector in
15854 If both values are 0, then this slot in the hash table is empty.
15855 This is ok because while 0 is a valid constant pool index, it
15856 cannot be a valid index for both a string and a CU vector.
15858 A string in the constant pool is stored as a \0-terminated string,
15861 A CU vector in the constant pool is a sequence of offset_type
15862 values. The first value is the number of CU indices in the vector.
15863 Each subsequent value is the index of a CU in the CU list. This
15864 element in the hash table is used to indicate which CUs define the
15867 6. The constant pool. This is simply a bunch of bytes. It is
15868 organized so that alignment is correct: CU vectors are stored
15869 first, followed by strings. */
15872 save_gdb_index_command (char *arg
, int from_tty
)
15874 struct objfile
*objfile
;
15877 error (_("usage: save gdb-index DIRECTORY"));
15879 ALL_OBJFILES (objfile
)
15883 /* If the objfile does not correspond to an actual file, skip it. */
15884 if (stat (objfile
->name
, &st
) < 0)
15887 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15888 if (dwarf2_per_objfile
)
15890 volatile struct gdb_exception except
;
15892 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15894 write_psymtabs_to_index (objfile
, arg
);
15896 if (except
.reason
< 0)
15897 exception_fprintf (gdb_stderr
, except
,
15898 _("Error while writing index for `%s': "),
15906 int dwarf2_always_disassemble
;
15909 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15910 struct cmd_list_element
*c
, const char *value
)
15912 fprintf_filtered (file
,
15913 _("Whether to always disassemble "
15914 "DWARF expressions is %s.\n"),
15918 void _initialize_dwarf2_read (void);
15921 _initialize_dwarf2_read (void)
15923 struct cmd_list_element
*c
;
15925 dwarf2_objfile_data_key
15926 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15928 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15929 Set DWARF 2 specific variables.\n\
15930 Configure DWARF 2 variables such as the cache size"),
15931 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15932 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15934 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15935 Show DWARF 2 specific variables\n\
15936 Show DWARF 2 variables such as the cache size"),
15937 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15938 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15940 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15941 &dwarf2_max_cache_age
, _("\
15942 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15943 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15944 A higher limit means that cached compilation units will be stored\n\
15945 in memory longer, and more total memory will be used. Zero disables\n\
15946 caching, which can slow down startup."),
15948 show_dwarf2_max_cache_age
,
15949 &set_dwarf2_cmdlist
,
15950 &show_dwarf2_cmdlist
);
15952 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15953 &dwarf2_always_disassemble
, _("\
15954 Set whether `info address' always disassembles DWARF expressions."), _("\
15955 Show whether `info address' always disassembles DWARF expressions."), _("\
15956 When enabled, DWARF expressions are always printed in an assembly-like\n\
15957 syntax. When disabled, expressions will be printed in a more\n\
15958 conversational style, when possible."),
15960 show_dwarf2_always_disassemble
,
15961 &set_dwarf2_cmdlist
,
15962 &show_dwarf2_cmdlist
);
15964 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15965 Set debugging of the dwarf2 DIE reader."), _("\
15966 Show debugging of the dwarf2 DIE reader."), _("\
15967 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15968 The value is the maximum depth to print."),
15971 &setdebuglist
, &showdebuglist
);
15973 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15975 Save a gdb-index file.\n\
15976 Usage: save gdb-index DIRECTORY"),
15978 set_cmd_completer (c
, filename_completer
);