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 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
))
2775 /* Build a partial symbol table. */
2778 dwarf2_build_psymtabs (struct objfile
*objfile
)
2780 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2782 init_psymbol_list (objfile
, 1024);
2785 dwarf2_build_psymtabs_hard (objfile
);
2788 /* Return TRUE if OFFSET is within CU_HEADER. */
2791 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2793 unsigned int bottom
= cu_header
->offset
;
2794 unsigned int top
= (cu_header
->offset
2796 + cu_header
->initial_length_size
);
2798 return (offset
>= bottom
&& offset
< top
);
2801 /* Read in the comp unit header information from the debug_info at info_ptr.
2802 NOTE: This leaves members offset, first_die_offset to be filled in
2806 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2807 gdb_byte
*info_ptr
, bfd
*abfd
)
2810 unsigned int bytes_read
;
2812 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2813 cu_header
->initial_length_size
= bytes_read
;
2814 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2815 info_ptr
+= bytes_read
;
2816 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2818 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2820 info_ptr
+= bytes_read
;
2821 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2823 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2824 if (signed_addr
< 0)
2825 internal_error (__FILE__
, __LINE__
,
2826 _("read_comp_unit_head: dwarf from non elf file"));
2827 cu_header
->signed_addr_p
= signed_addr
;
2833 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2834 gdb_byte
*buffer
, unsigned int buffer_size
,
2837 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2839 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2841 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2842 error (_("Dwarf Error: wrong version in compilation unit header "
2843 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2844 bfd_get_filename (abfd
));
2846 if (header
->abbrev_offset
2847 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
2848 &dwarf2_per_objfile
->abbrev
))
2849 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2850 "(offset 0x%lx + 6) [in module %s]"),
2851 (long) header
->abbrev_offset
,
2852 (long) (beg_of_comp_unit
- buffer
),
2853 bfd_get_filename (abfd
));
2855 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2856 > buffer
+ buffer_size
)
2857 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2858 "(offset 0x%lx + 0) [in module %s]"),
2859 (long) header
->length
,
2860 (long) (beg_of_comp_unit
- buffer
),
2861 bfd_get_filename (abfd
));
2866 /* Read in the types comp unit header information from .debug_types entry at
2867 types_ptr. The result is a pointer to one past the end of the header. */
2870 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2871 ULONGEST
*signature
,
2872 gdb_byte
*types_ptr
, bfd
*abfd
)
2874 gdb_byte
*initial_types_ptr
= types_ptr
;
2876 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2877 &dwarf2_per_objfile
->types
);
2878 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2880 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2882 *signature
= read_8_bytes (abfd
, types_ptr
);
2884 types_ptr
+= cu_header
->offset_size
;
2885 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2890 /* Allocate a new partial symtab for file named NAME and mark this new
2891 partial symtab as being an include of PST. */
2894 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2895 struct objfile
*objfile
)
2897 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2899 subpst
->section_offsets
= pst
->section_offsets
;
2900 subpst
->textlow
= 0;
2901 subpst
->texthigh
= 0;
2903 subpst
->dependencies
= (struct partial_symtab
**)
2904 obstack_alloc (&objfile
->objfile_obstack
,
2905 sizeof (struct partial_symtab
*));
2906 subpst
->dependencies
[0] = pst
;
2907 subpst
->number_of_dependencies
= 1;
2909 subpst
->globals_offset
= 0;
2910 subpst
->n_global_syms
= 0;
2911 subpst
->statics_offset
= 0;
2912 subpst
->n_static_syms
= 0;
2913 subpst
->symtab
= NULL
;
2914 subpst
->read_symtab
= pst
->read_symtab
;
2917 /* No private part is necessary for include psymtabs. This property
2918 can be used to differentiate between such include psymtabs and
2919 the regular ones. */
2920 subpst
->read_symtab_private
= NULL
;
2923 /* Read the Line Number Program data and extract the list of files
2924 included by the source file represented by PST. Build an include
2925 partial symtab for each of these included files. */
2928 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2929 struct die_info
*die
,
2930 struct partial_symtab
*pst
)
2932 struct objfile
*objfile
= cu
->objfile
;
2933 bfd
*abfd
= objfile
->obfd
;
2934 struct line_header
*lh
= NULL
;
2935 struct attribute
*attr
;
2937 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2940 unsigned int line_offset
= DW_UNSND (attr
);
2942 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2945 return; /* No linetable, so no includes. */
2947 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2948 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2950 free_line_header (lh
);
2954 hash_type_signature (const void *item
)
2956 const struct signatured_type
*type_sig
= item
;
2958 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2959 return type_sig
->signature
;
2963 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2965 const struct signatured_type
*lhs
= item_lhs
;
2966 const struct signatured_type
*rhs
= item_rhs
;
2968 return lhs
->signature
== rhs
->signature
;
2971 /* Allocate a hash table for signatured types. */
2974 allocate_signatured_type_table (struct objfile
*objfile
)
2976 return htab_create_alloc_ex (41,
2977 hash_type_signature
,
2980 &objfile
->objfile_obstack
,
2981 hashtab_obstack_allocate
,
2982 dummy_obstack_deallocate
);
2985 /* A helper function to add a signatured type CU to a list. */
2988 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2990 struct signatured_type
*sigt
= *slot
;
2991 struct dwarf2_per_cu_data
***datap
= datum
;
2993 **datap
= &sigt
->per_cu
;
2999 /* Create the hash table of all entries in the .debug_types section.
3000 The result is zero if there is an error (e.g. missing .debug_types section),
3001 otherwise non-zero. */
3004 create_debug_types_hash_table (struct objfile
*objfile
)
3008 struct dwarf2_per_cu_data
**iter
;
3010 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
3011 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
3013 if (info_ptr
== NULL
)
3015 dwarf2_per_objfile
->signatured_types
= NULL
;
3019 types_htab
= allocate_signatured_type_table (objfile
);
3021 if (dwarf2_die_debug
)
3022 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
3024 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
3025 + dwarf2_per_objfile
->types
.size
)
3027 unsigned int offset
;
3028 unsigned int offset_size
;
3029 unsigned int type_offset
;
3030 unsigned int length
, initial_length_size
;
3031 unsigned short version
;
3033 struct signatured_type
*type_sig
;
3035 gdb_byte
*ptr
= info_ptr
;
3037 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
3039 /* We need to read the type's signature in order to build the hash
3040 table, but we don't need to read anything else just yet. */
3042 /* Sanity check to ensure entire cu is present. */
3043 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
3044 if (ptr
+ length
+ initial_length_size
3045 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
3047 complaint (&symfile_complaints
,
3048 _("debug type entry runs off end "
3049 "of `.debug_types' section, ignored"));
3053 offset_size
= initial_length_size
== 4 ? 4 : 8;
3054 ptr
+= initial_length_size
;
3055 version
= bfd_get_16 (objfile
->obfd
, ptr
);
3057 ptr
+= offset_size
; /* abbrev offset */
3058 ptr
+= 1; /* address size */
3059 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
3061 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
3063 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
3064 memset (type_sig
, 0, sizeof (*type_sig
));
3065 type_sig
->signature
= signature
;
3066 type_sig
->offset
= offset
;
3067 type_sig
->type_offset
= type_offset
;
3068 type_sig
->per_cu
.objfile
= objfile
;
3069 type_sig
->per_cu
.from_debug_types
= 1;
3071 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
3072 gdb_assert (slot
!= NULL
);
3075 if (dwarf2_die_debug
)
3076 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3077 offset
, phex (signature
, sizeof (signature
)));
3079 info_ptr
= info_ptr
+ initial_length_size
+ length
;
3082 dwarf2_per_objfile
->signatured_types
= types_htab
;
3084 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
3085 dwarf2_per_objfile
->type_comp_units
3086 = obstack_alloc (&objfile
->objfile_obstack
,
3087 dwarf2_per_objfile
->n_type_comp_units
3088 * sizeof (struct dwarf2_per_cu_data
*));
3089 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
3090 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
3091 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
3092 == dwarf2_per_objfile
->n_type_comp_units
);
3097 /* Lookup a signature based type.
3098 Returns NULL if SIG is not present in the table. */
3100 static struct signatured_type
*
3101 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
3103 struct signatured_type find_entry
, *entry
;
3105 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3107 complaint (&symfile_complaints
,
3108 _("missing `.debug_types' section for DW_FORM_sig8 die"));
3112 find_entry
.signature
= sig
;
3113 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3117 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3120 init_cu_die_reader (struct die_reader_specs
*reader
,
3121 struct dwarf2_cu
*cu
)
3123 reader
->abfd
= cu
->objfile
->obfd
;
3125 if (cu
->per_cu
->from_debug_types
)
3127 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3128 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
3132 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3133 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
3137 /* Find the base address of the compilation unit for range lists and
3138 location lists. It will normally be specified by DW_AT_low_pc.
3139 In DWARF-3 draft 4, the base address could be overridden by
3140 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3141 compilation units with discontinuous ranges. */
3144 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3146 struct attribute
*attr
;
3149 cu
->base_address
= 0;
3151 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3154 cu
->base_address
= DW_ADDR (attr
);
3159 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3162 cu
->base_address
= DW_ADDR (attr
);
3168 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3169 to combine the common parts.
3170 Process a compilation unit for a psymtab.
3171 BUFFER is a pointer to the beginning of the dwarf section buffer,
3172 either .debug_info or debug_types.
3173 INFO_PTR is a pointer to the start of the CU.
3174 Returns a pointer to the next CU. */
3177 process_psymtab_comp_unit (struct objfile
*objfile
,
3178 struct dwarf2_per_cu_data
*this_cu
,
3179 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3180 unsigned int buffer_size
)
3182 bfd
*abfd
= objfile
->obfd
;
3183 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3184 struct die_info
*comp_unit_die
;
3185 struct partial_symtab
*pst
;
3187 struct cleanup
*back_to_inner
;
3188 struct dwarf2_cu cu
;
3189 int has_children
, has_pc_info
;
3190 struct attribute
*attr
;
3191 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3192 struct die_reader_specs reader_specs
;
3193 const char *filename
;
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 if (attr
== NULL
|| !DW_STRING (attr
))
3256 filename
= DW_STRING (attr
);
3257 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3259 /* TEXTLOW and TEXTHIGH are set below. */
3261 objfile
->global_psymbols
.next
,
3262 objfile
->static_psymbols
.next
);
3264 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3266 pst
->dirname
= DW_STRING (attr
);
3268 pst
->read_symtab_private
= this_cu
;
3270 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3272 /* Store the function that reads in the rest of the symbol table. */
3273 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3275 this_cu
->v
.psymtab
= pst
;
3277 dwarf2_find_base_address (comp_unit_die
, &cu
);
3279 /* Possibly set the default values of LOWPC and HIGHPC from
3281 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3282 &best_highpc
, &cu
, pst
);
3283 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3284 /* Store the contiguous range if it is not empty; it can be empty for
3285 CUs with no code. */
3286 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3287 best_lowpc
+ baseaddr
,
3288 best_highpc
+ baseaddr
- 1, pst
);
3290 /* Check if comp unit has_children.
3291 If so, read the rest of the partial symbols from this comp unit.
3292 If not, there's no more debug_info for this comp unit. */
3295 struct partial_die_info
*first_die
;
3296 CORE_ADDR lowpc
, highpc
;
3298 lowpc
= ((CORE_ADDR
) -1);
3299 highpc
= ((CORE_ADDR
) 0);
3301 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3303 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3304 ! has_pc_info
, &cu
);
3306 /* If we didn't find a lowpc, set it to highpc to avoid
3307 complaints from `maint check'. */
3308 if (lowpc
== ((CORE_ADDR
) -1))
3311 /* If the compilation unit didn't have an explicit address range,
3312 then use the information extracted from its child dies. */
3316 best_highpc
= highpc
;
3319 pst
->textlow
= best_lowpc
+ baseaddr
;
3320 pst
->texthigh
= best_highpc
+ baseaddr
;
3322 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3323 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3324 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3325 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3326 sort_pst_symbols (pst
);
3328 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3329 + cu
.header
.initial_length_size
);
3331 if (this_cu
->from_debug_types
)
3333 /* It's not clear we want to do anything with stmt lists here.
3334 Waiting to see what gcc ultimately does. */
3338 /* Get the list of files included in the current compilation unit,
3339 and build a psymtab for each of them. */
3340 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3343 do_cleanups (back_to_inner
);
3348 /* Traversal function for htab_traverse_noresize.
3349 Process one .debug_types comp-unit. */
3352 process_type_comp_unit (void **slot
, void *info
)
3354 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3355 struct objfile
*objfile
= (struct objfile
*) info
;
3356 struct dwarf2_per_cu_data
*this_cu
;
3358 this_cu
= &entry
->per_cu
;
3360 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3361 process_psymtab_comp_unit (objfile
, this_cu
,
3362 dwarf2_per_objfile
->types
.buffer
,
3363 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3364 dwarf2_per_objfile
->types
.size
);
3369 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3370 Build partial symbol tables for the .debug_types comp-units. */
3373 build_type_psymtabs (struct objfile
*objfile
)
3375 if (! create_debug_types_hash_table (objfile
))
3378 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3379 process_type_comp_unit
, objfile
);
3382 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3385 psymtabs_addrmap_cleanup (void *o
)
3387 struct objfile
*objfile
= o
;
3389 objfile
->psymtabs_addrmap
= NULL
;
3392 /* Build the partial symbol table by doing a quick pass through the
3393 .debug_info and .debug_abbrev sections. */
3396 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3399 struct cleanup
*back_to
, *addrmap_cleanup
;
3400 struct obstack temp_obstack
;
3402 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3404 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3405 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3407 /* Any cached compilation units will be linked by the per-objfile
3408 read_in_chain. Make sure to free them when we're done. */
3409 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3411 build_type_psymtabs (objfile
);
3413 create_all_comp_units (objfile
);
3415 /* Create a temporary address map on a temporary obstack. We later
3416 copy this to the final obstack. */
3417 obstack_init (&temp_obstack
);
3418 make_cleanup_obstack_free (&temp_obstack
);
3419 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3420 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3422 /* Since the objects we're extracting from .debug_info vary in
3423 length, only the individual functions to extract them (like
3424 read_comp_unit_head and load_partial_die) can really know whether
3425 the buffer is large enough to hold another complete object.
3427 At the moment, they don't actually check that. If .debug_info
3428 holds just one extra byte after the last compilation unit's dies,
3429 then read_comp_unit_head will happily read off the end of the
3430 buffer. read_partial_die is similarly casual. Those functions
3433 For this loop condition, simply checking whether there's any data
3434 left at all should be sufficient. */
3436 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3437 + dwarf2_per_objfile
->info
.size
))
3439 struct dwarf2_per_cu_data
*this_cu
;
3441 this_cu
= dwarf2_find_comp_unit (info_ptr
3442 - dwarf2_per_objfile
->info
.buffer
,
3445 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3446 dwarf2_per_objfile
->info
.buffer
,
3448 dwarf2_per_objfile
->info
.size
);
3451 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3452 &objfile
->objfile_obstack
);
3453 discard_cleanups (addrmap_cleanup
);
3455 do_cleanups (back_to
);
3458 /* Load the partial DIEs for a secondary CU into memory. */
3461 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3462 struct objfile
*objfile
)
3464 bfd
*abfd
= objfile
->obfd
;
3465 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3466 struct die_info
*comp_unit_die
;
3467 struct dwarf2_cu
*cu
;
3468 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3470 struct die_reader_specs reader_specs
;
3473 gdb_assert (! this_cu
->from_debug_types
);
3475 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3476 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3477 beg_of_comp_unit
= info_ptr
;
3479 if (this_cu
->cu
== NULL
)
3481 cu
= xmalloc (sizeof (*cu
));
3482 init_one_comp_unit (cu
, objfile
);
3486 /* If an error occurs while loading, release our storage. */
3487 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3489 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3490 dwarf2_per_objfile
->info
.buffer
,
3491 dwarf2_per_objfile
->info
.size
,
3494 /* Complete the cu_header. */
3495 cu
->header
.offset
= this_cu
->offset
;
3496 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3498 /* Link this compilation unit into the compilation unit tree. */
3500 cu
->per_cu
= this_cu
;
3502 /* Link this CU into read_in_chain. */
3503 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3504 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3509 info_ptr
+= cu
->header
.first_die_offset
;
3512 /* Read the abbrevs for this compilation unit into a table. */
3513 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3514 dwarf2_read_abbrevs (abfd
, cu
);
3515 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3517 /* Read the compilation unit die. */
3518 init_cu_die_reader (&reader_specs
, cu
);
3519 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3522 prepare_one_comp_unit (cu
, comp_unit_die
);
3524 /* Check if comp unit has_children.
3525 If so, read the rest of the partial symbols from this comp unit.
3526 If not, there's no more debug_info for this comp unit. */
3528 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3530 do_cleanups (free_abbrevs_cleanup
);
3534 /* We've successfully allocated this compilation unit. Let our
3535 caller clean it up when finished with it. */
3536 discard_cleanups (free_cu_cleanup
);
3540 /* Create a list of all compilation units in OBJFILE. We do this only
3541 if an inter-comp-unit reference is found; presumably if there is one,
3542 there will be many, and one will occur early in the .debug_info section.
3543 So there's no point in building this list incrementally. */
3546 create_all_comp_units (struct objfile
*objfile
)
3550 struct dwarf2_per_cu_data
**all_comp_units
;
3553 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3554 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3558 all_comp_units
= xmalloc (n_allocated
3559 * sizeof (struct dwarf2_per_cu_data
*));
3561 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
3562 + dwarf2_per_objfile
->info
.size
)
3564 unsigned int length
, initial_length_size
;
3565 struct dwarf2_per_cu_data
*this_cu
;
3566 unsigned int offset
;
3568 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3570 /* Read just enough information to find out where the next
3571 compilation unit is. */
3572 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3573 &initial_length_size
);
3575 /* Save the compilation unit for later lookup. */
3576 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3577 sizeof (struct dwarf2_per_cu_data
));
3578 memset (this_cu
, 0, sizeof (*this_cu
));
3579 this_cu
->offset
= offset
;
3580 this_cu
->length
= length
+ initial_length_size
;
3581 this_cu
->objfile
= objfile
;
3583 if (n_comp_units
== n_allocated
)
3586 all_comp_units
= xrealloc (all_comp_units
,
3588 * sizeof (struct dwarf2_per_cu_data
*));
3590 all_comp_units
[n_comp_units
++] = this_cu
;
3592 info_ptr
= info_ptr
+ this_cu
->length
;
3595 dwarf2_per_objfile
->all_comp_units
3596 = obstack_alloc (&objfile
->objfile_obstack
,
3597 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3598 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3599 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3600 xfree (all_comp_units
);
3601 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3604 /* Process all loaded DIEs for compilation unit CU, starting at
3605 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3606 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3607 DW_AT_ranges). If NEED_PC is set, then this function will set
3608 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3609 and record the covered ranges in the addrmap. */
3612 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3613 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3615 struct partial_die_info
*pdi
;
3617 /* Now, march along the PDI's, descending into ones which have
3618 interesting children but skipping the children of the other ones,
3619 until we reach the end of the compilation unit. */
3625 fixup_partial_die (pdi
, cu
);
3627 /* Anonymous namespaces or modules have no name but have interesting
3628 children, so we need to look at them. Ditto for anonymous
3631 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3632 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3636 case DW_TAG_subprogram
:
3637 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3639 case DW_TAG_constant
:
3640 case DW_TAG_variable
:
3641 case DW_TAG_typedef
:
3642 case DW_TAG_union_type
:
3643 if (!pdi
->is_declaration
)
3645 add_partial_symbol (pdi
, cu
);
3648 case DW_TAG_class_type
:
3649 case DW_TAG_interface_type
:
3650 case DW_TAG_structure_type
:
3651 if (!pdi
->is_declaration
)
3653 add_partial_symbol (pdi
, cu
);
3656 case DW_TAG_enumeration_type
:
3657 if (!pdi
->is_declaration
)
3658 add_partial_enumeration (pdi
, cu
);
3660 case DW_TAG_base_type
:
3661 case DW_TAG_subrange_type
:
3662 /* File scope base type definitions are added to the partial
3664 add_partial_symbol (pdi
, cu
);
3666 case DW_TAG_namespace
:
3667 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3670 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3677 /* If the die has a sibling, skip to the sibling. */
3679 pdi
= pdi
->die_sibling
;
3683 /* Functions used to compute the fully scoped name of a partial DIE.
3685 Normally, this is simple. For C++, the parent DIE's fully scoped
3686 name is concatenated with "::" and the partial DIE's name. For
3687 Java, the same thing occurs except that "." is used instead of "::".
3688 Enumerators are an exception; they use the scope of their parent
3689 enumeration type, i.e. the name of the enumeration type is not
3690 prepended to the enumerator.
3692 There are two complexities. One is DW_AT_specification; in this
3693 case "parent" means the parent of the target of the specification,
3694 instead of the direct parent of the DIE. The other is compilers
3695 which do not emit DW_TAG_namespace; in this case we try to guess
3696 the fully qualified name of structure types from their members'
3697 linkage names. This must be done using the DIE's children rather
3698 than the children of any DW_AT_specification target. We only need
3699 to do this for structures at the top level, i.e. if the target of
3700 any DW_AT_specification (if any; otherwise the DIE itself) does not
3703 /* Compute the scope prefix associated with PDI's parent, in
3704 compilation unit CU. The result will be allocated on CU's
3705 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3706 field. NULL is returned if no prefix is necessary. */
3708 partial_die_parent_scope (struct partial_die_info
*pdi
,
3709 struct dwarf2_cu
*cu
)
3711 char *grandparent_scope
;
3712 struct partial_die_info
*parent
, *real_pdi
;
3714 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3715 then this means the parent of the specification DIE. */
3718 while (real_pdi
->has_specification
)
3719 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3721 parent
= real_pdi
->die_parent
;
3725 if (parent
->scope_set
)
3726 return parent
->scope
;
3728 fixup_partial_die (parent
, cu
);
3730 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3732 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3733 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3734 Work around this problem here. */
3735 if (cu
->language
== language_cplus
3736 && parent
->tag
== DW_TAG_namespace
3737 && strcmp (parent
->name
, "::") == 0
3738 && grandparent_scope
== NULL
)
3740 parent
->scope
= NULL
;
3741 parent
->scope_set
= 1;
3745 if (parent
->tag
== DW_TAG_namespace
3746 || parent
->tag
== DW_TAG_module
3747 || parent
->tag
== DW_TAG_structure_type
3748 || parent
->tag
== DW_TAG_class_type
3749 || parent
->tag
== DW_TAG_interface_type
3750 || parent
->tag
== DW_TAG_union_type
3751 || parent
->tag
== DW_TAG_enumeration_type
)
3753 if (grandparent_scope
== NULL
)
3754 parent
->scope
= parent
->name
;
3756 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
3758 parent
->name
, 0, cu
);
3760 else if (parent
->tag
== DW_TAG_enumerator
)
3761 /* Enumerators should not get the name of the enumeration as a prefix. */
3762 parent
->scope
= grandparent_scope
;
3765 /* FIXME drow/2004-04-01: What should we be doing with
3766 function-local names? For partial symbols, we should probably be
3768 complaint (&symfile_complaints
,
3769 _("unhandled containing DIE tag %d for DIE at %d"),
3770 parent
->tag
, pdi
->offset
);
3771 parent
->scope
= grandparent_scope
;
3774 parent
->scope_set
= 1;
3775 return parent
->scope
;
3778 /* Return the fully scoped name associated with PDI, from compilation unit
3779 CU. The result will be allocated with malloc. */
3781 partial_die_full_name (struct partial_die_info
*pdi
,
3782 struct dwarf2_cu
*cu
)
3786 /* If this is a template instantiation, we can not work out the
3787 template arguments from partial DIEs. So, unfortunately, we have
3788 to go through the full DIEs. At least any work we do building
3789 types here will be reused if full symbols are loaded later. */
3790 if (pdi
->has_template_arguments
)
3792 fixup_partial_die (pdi
, cu
);
3794 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3796 struct die_info
*die
;
3797 struct attribute attr
;
3798 struct dwarf2_cu
*ref_cu
= cu
;
3801 attr
.form
= DW_FORM_ref_addr
;
3802 attr
.u
.addr
= pdi
->offset
;
3803 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3805 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3809 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3810 if (parent_scope
== NULL
)
3813 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3817 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3819 struct objfile
*objfile
= cu
->objfile
;
3821 char *actual_name
= NULL
;
3822 const struct partial_symbol
*psym
= NULL
;
3824 int built_actual_name
= 0;
3826 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3828 actual_name
= partial_die_full_name (pdi
, cu
);
3830 built_actual_name
= 1;
3832 if (actual_name
== NULL
)
3833 actual_name
= pdi
->name
;
3837 case DW_TAG_subprogram
:
3838 if (pdi
->is_external
|| cu
->language
== language_ada
)
3840 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3841 of the global scope. But in Ada, we want to be able to access
3842 nested procedures globally. So all Ada subprograms are stored
3843 in the global scope. */
3844 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3845 mst_text, objfile); */
3846 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3848 VAR_DOMAIN
, LOC_BLOCK
,
3849 &objfile
->global_psymbols
,
3850 0, pdi
->lowpc
+ baseaddr
,
3851 cu
->language
, objfile
);
3855 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3856 mst_file_text, objfile); */
3857 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3859 VAR_DOMAIN
, LOC_BLOCK
,
3860 &objfile
->static_psymbols
,
3861 0, pdi
->lowpc
+ baseaddr
,
3862 cu
->language
, objfile
);
3865 case DW_TAG_constant
:
3867 struct psymbol_allocation_list
*list
;
3869 if (pdi
->is_external
)
3870 list
= &objfile
->global_psymbols
;
3872 list
= &objfile
->static_psymbols
;
3873 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3874 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
3875 list
, 0, 0, cu
->language
, objfile
);
3878 case DW_TAG_variable
:
3880 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3884 && !dwarf2_per_objfile
->has_section_at_zero
)
3886 /* A global or static variable may also have been stripped
3887 out by the linker if unused, in which case its address
3888 will be nullified; do not add such variables into partial
3889 symbol table then. */
3891 else if (pdi
->is_external
)
3894 Don't enter into the minimal symbol tables as there is
3895 a minimal symbol table entry from the ELF symbols already.
3896 Enter into partial symbol table if it has a location
3897 descriptor or a type.
3898 If the location descriptor is missing, new_symbol will create
3899 a LOC_UNRESOLVED symbol, the address of the variable will then
3900 be determined from the minimal symbol table whenever the variable
3902 The address for the partial symbol table entry is not
3903 used by GDB, but it comes in handy for debugging partial symbol
3906 if (pdi
->locdesc
|| pdi
->has_type
)
3907 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3909 VAR_DOMAIN
, LOC_STATIC
,
3910 &objfile
->global_psymbols
,
3912 cu
->language
, objfile
);
3916 /* Static Variable. Skip symbols without location descriptors. */
3917 if (pdi
->locdesc
== NULL
)
3919 if (built_actual_name
)
3920 xfree (actual_name
);
3923 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
3924 mst_file_data, objfile); */
3925 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3927 VAR_DOMAIN
, LOC_STATIC
,
3928 &objfile
->static_psymbols
,
3930 cu
->language
, objfile
);
3933 case DW_TAG_typedef
:
3934 case DW_TAG_base_type
:
3935 case DW_TAG_subrange_type
:
3936 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3938 VAR_DOMAIN
, LOC_TYPEDEF
,
3939 &objfile
->static_psymbols
,
3940 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3942 case DW_TAG_namespace
:
3943 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3945 VAR_DOMAIN
, LOC_TYPEDEF
,
3946 &objfile
->global_psymbols
,
3947 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3949 case DW_TAG_class_type
:
3950 case DW_TAG_interface_type
:
3951 case DW_TAG_structure_type
:
3952 case DW_TAG_union_type
:
3953 case DW_TAG_enumeration_type
:
3954 /* Skip external references. The DWARF standard says in the section
3955 about "Structure, Union, and Class Type Entries": "An incomplete
3956 structure, union or class type is represented by a structure,
3957 union or class entry that does not have a byte size attribute
3958 and that has a DW_AT_declaration attribute." */
3959 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3961 if (built_actual_name
)
3962 xfree (actual_name
);
3966 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3967 static vs. global. */
3968 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3970 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3971 (cu
->language
== language_cplus
3972 || cu
->language
== language_java
)
3973 ? &objfile
->global_psymbols
3974 : &objfile
->static_psymbols
,
3975 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3978 case DW_TAG_enumerator
:
3979 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3981 VAR_DOMAIN
, LOC_CONST
,
3982 (cu
->language
== language_cplus
3983 || cu
->language
== language_java
)
3984 ? &objfile
->global_psymbols
3985 : &objfile
->static_psymbols
,
3986 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3992 if (built_actual_name
)
3993 xfree (actual_name
);
3996 /* Read a partial die corresponding to a namespace; also, add a symbol
3997 corresponding to that namespace to the symbol table. NAMESPACE is
3998 the name of the enclosing namespace. */
4001 add_partial_namespace (struct partial_die_info
*pdi
,
4002 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4003 int need_pc
, struct dwarf2_cu
*cu
)
4005 /* Add a symbol for the namespace. */
4007 add_partial_symbol (pdi
, cu
);
4009 /* Now scan partial symbols in that namespace. */
4011 if (pdi
->has_children
)
4012 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4015 /* Read a partial die corresponding to a Fortran module. */
4018 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
4019 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4021 /* Now scan partial symbols in that module. */
4023 if (pdi
->has_children
)
4024 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4027 /* Read a partial die corresponding to a subprogram and create a partial
4028 symbol for that subprogram. When the CU language allows it, this
4029 routine also defines a partial symbol for each nested subprogram
4030 that this subprogram contains.
4032 DIE my also be a lexical block, in which case we simply search
4033 recursively for suprograms defined inside that lexical block.
4034 Again, this is only performed when the CU language allows this
4035 type of definitions. */
4038 add_partial_subprogram (struct partial_die_info
*pdi
,
4039 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4040 int need_pc
, struct dwarf2_cu
*cu
)
4042 if (pdi
->tag
== DW_TAG_subprogram
)
4044 if (pdi
->has_pc_info
)
4046 if (pdi
->lowpc
< *lowpc
)
4047 *lowpc
= pdi
->lowpc
;
4048 if (pdi
->highpc
> *highpc
)
4049 *highpc
= pdi
->highpc
;
4053 struct objfile
*objfile
= cu
->objfile
;
4055 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4056 SECT_OFF_TEXT (objfile
));
4057 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4058 pdi
->lowpc
+ baseaddr
,
4059 pdi
->highpc
- 1 + baseaddr
,
4060 cu
->per_cu
->v
.psymtab
);
4062 if (!pdi
->is_declaration
)
4063 /* Ignore subprogram DIEs that do not have a name, they are
4064 illegal. Do not emit a complaint at this point, we will
4065 do so when we convert this psymtab into a symtab. */
4067 add_partial_symbol (pdi
, cu
);
4071 if (! pdi
->has_children
)
4074 if (cu
->language
== language_ada
)
4076 pdi
= pdi
->die_child
;
4079 fixup_partial_die (pdi
, cu
);
4080 if (pdi
->tag
== DW_TAG_subprogram
4081 || pdi
->tag
== DW_TAG_lexical_block
)
4082 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4083 pdi
= pdi
->die_sibling
;
4088 /* Read a partial die corresponding to an enumeration type. */
4091 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4092 struct dwarf2_cu
*cu
)
4094 struct partial_die_info
*pdi
;
4096 if (enum_pdi
->name
!= NULL
)
4097 add_partial_symbol (enum_pdi
, cu
);
4099 pdi
= enum_pdi
->die_child
;
4102 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4103 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
4105 add_partial_symbol (pdi
, cu
);
4106 pdi
= pdi
->die_sibling
;
4110 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4111 Return the corresponding abbrev, or NULL if the number is zero (indicating
4112 an empty DIE). In either case *BYTES_READ will be set to the length of
4113 the initial number. */
4115 static struct abbrev_info
*
4116 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
4117 struct dwarf2_cu
*cu
)
4119 bfd
*abfd
= cu
->objfile
->obfd
;
4120 unsigned int abbrev_number
;
4121 struct abbrev_info
*abbrev
;
4123 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4125 if (abbrev_number
== 0)
4128 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4131 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4132 abbrev_number
, bfd_get_filename (abfd
));
4138 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4139 Returns a pointer to the end of a series of DIEs, terminated by an empty
4140 DIE. Any children of the skipped DIEs will also be skipped. */
4143 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4145 struct abbrev_info
*abbrev
;
4146 unsigned int bytes_read
;
4150 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4152 return info_ptr
+ bytes_read
;
4154 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4158 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4159 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4160 abbrev corresponding to that skipped uleb128 should be passed in
4161 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4165 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4166 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4168 unsigned int bytes_read
;
4169 struct attribute attr
;
4170 bfd
*abfd
= cu
->objfile
->obfd
;
4171 unsigned int form
, i
;
4173 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4175 /* The only abbrev we care about is DW_AT_sibling. */
4176 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4178 read_attribute (&attr
, &abbrev
->attrs
[i
],
4179 abfd
, info_ptr
, cu
);
4180 if (attr
.form
== DW_FORM_ref_addr
)
4181 complaint (&symfile_complaints
,
4182 _("ignoring absolute DW_AT_sibling"));
4184 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4187 /* If it isn't DW_AT_sibling, skip this attribute. */
4188 form
= abbrev
->attrs
[i
].form
;
4192 case DW_FORM_ref_addr
:
4193 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4194 and later it is offset sized. */
4195 if (cu
->header
.version
== 2)
4196 info_ptr
+= cu
->header
.addr_size
;
4198 info_ptr
+= cu
->header
.offset_size
;
4201 info_ptr
+= cu
->header
.addr_size
;
4208 case DW_FORM_flag_present
:
4223 case DW_FORM_string
:
4224 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4225 info_ptr
+= bytes_read
;
4227 case DW_FORM_sec_offset
:
4229 info_ptr
+= cu
->header
.offset_size
;
4231 case DW_FORM_exprloc
:
4233 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4234 info_ptr
+= bytes_read
;
4236 case DW_FORM_block1
:
4237 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4239 case DW_FORM_block2
:
4240 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4242 case DW_FORM_block4
:
4243 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4247 case DW_FORM_ref_udata
:
4248 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4250 case DW_FORM_indirect
:
4251 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4252 info_ptr
+= bytes_read
;
4253 /* We need to continue parsing from here, so just go back to
4255 goto skip_attribute
;
4258 error (_("Dwarf Error: Cannot handle %s "
4259 "in DWARF reader [in module %s]"),
4260 dwarf_form_name (form
),
4261 bfd_get_filename (abfd
));
4265 if (abbrev
->has_children
)
4266 return skip_children (buffer
, info_ptr
, cu
);
4271 /* Locate ORIG_PDI's sibling.
4272 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4276 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4277 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4278 bfd
*abfd
, struct dwarf2_cu
*cu
)
4280 /* Do we know the sibling already? */
4282 if (orig_pdi
->sibling
)
4283 return orig_pdi
->sibling
;
4285 /* Are there any children to deal with? */
4287 if (!orig_pdi
->has_children
)
4290 /* Skip the children the long way. */
4292 return skip_children (buffer
, info_ptr
, cu
);
4295 /* Expand this partial symbol table into a full symbol table. */
4298 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4304 warning (_("bug: psymtab for %s is already read in."),
4311 printf_filtered (_("Reading in symbols for %s..."),
4313 gdb_flush (gdb_stdout
);
4316 /* Restore our global data. */
4317 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4318 dwarf2_objfile_data_key
);
4320 /* If this psymtab is constructed from a debug-only objfile, the
4321 has_section_at_zero flag will not necessarily be correct. We
4322 can get the correct value for this flag by looking at the data
4323 associated with the (presumably stripped) associated objfile. */
4324 if (pst
->objfile
->separate_debug_objfile_backlink
)
4326 struct dwarf2_per_objfile
*dpo_backlink
4327 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4328 dwarf2_objfile_data_key
);
4330 dwarf2_per_objfile
->has_section_at_zero
4331 = dpo_backlink
->has_section_at_zero
;
4334 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4336 psymtab_to_symtab_1 (pst
);
4338 /* Finish up the debug error message. */
4340 printf_filtered (_("done.\n"));
4345 /* Add PER_CU to the queue. */
4348 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4350 struct dwarf2_queue_item
*item
;
4353 item
= xmalloc (sizeof (*item
));
4354 item
->per_cu
= per_cu
;
4357 if (dwarf2_queue
== NULL
)
4358 dwarf2_queue
= item
;
4360 dwarf2_queue_tail
->next
= item
;
4362 dwarf2_queue_tail
= item
;
4365 /* Process the queue. */
4368 process_queue (struct objfile
*objfile
)
4370 struct dwarf2_queue_item
*item
, *next_item
;
4372 /* The queue starts out with one item, but following a DIE reference
4373 may load a new CU, adding it to the end of the queue. */
4374 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4376 if (dwarf2_per_objfile
->using_index
4377 ? !item
->per_cu
->v
.quick
->symtab
4378 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4379 process_full_comp_unit (item
->per_cu
);
4381 item
->per_cu
->queued
= 0;
4382 next_item
= item
->next
;
4386 dwarf2_queue_tail
= NULL
;
4389 /* Free all allocated queue entries. This function only releases anything if
4390 an error was thrown; if the queue was processed then it would have been
4391 freed as we went along. */
4394 dwarf2_release_queue (void *dummy
)
4396 struct dwarf2_queue_item
*item
, *last
;
4398 item
= dwarf2_queue
;
4401 /* Anything still marked queued is likely to be in an
4402 inconsistent state, so discard it. */
4403 if (item
->per_cu
->queued
)
4405 if (item
->per_cu
->cu
!= NULL
)
4406 free_one_cached_comp_unit (item
->per_cu
->cu
);
4407 item
->per_cu
->queued
= 0;
4415 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4418 /* Read in full symbols for PST, and anything it depends on. */
4421 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4423 struct dwarf2_per_cu_data
*per_cu
;
4424 struct cleanup
*back_to
;
4427 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4428 if (!pst
->dependencies
[i
]->readin
)
4430 /* Inform about additional files that need to be read in. */
4433 /* FIXME: i18n: Need to make this a single string. */
4434 fputs_filtered (" ", gdb_stdout
);
4436 fputs_filtered ("and ", gdb_stdout
);
4438 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4439 wrap_here (""); /* Flush output. */
4440 gdb_flush (gdb_stdout
);
4442 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4445 per_cu
= pst
->read_symtab_private
;
4449 /* It's an include file, no symbols to read for it.
4450 Everything is in the parent symtab. */
4455 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4458 /* Load the DIEs associated with PER_CU into memory. */
4461 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
4462 struct objfile
*objfile
)
4464 bfd
*abfd
= objfile
->obfd
;
4465 struct dwarf2_cu
*cu
;
4466 unsigned int offset
;
4467 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4468 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4469 struct attribute
*attr
;
4472 gdb_assert (! per_cu
->from_debug_types
);
4474 /* Set local variables from the partial symbol table info. */
4475 offset
= per_cu
->offset
;
4477 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4478 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4479 beg_of_comp_unit
= info_ptr
;
4481 if (per_cu
->cu
== NULL
)
4483 cu
= xmalloc (sizeof (*cu
));
4484 init_one_comp_unit (cu
, objfile
);
4488 /* If an error occurs while loading, release our storage. */
4489 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4491 /* Read in the comp_unit header. */
4492 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4494 /* Complete the cu_header. */
4495 cu
->header
.offset
= offset
;
4496 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4498 /* Read the abbrevs for this compilation unit. */
4499 dwarf2_read_abbrevs (abfd
, cu
);
4500 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4502 /* Link this compilation unit into the compilation unit tree. */
4504 cu
->per_cu
= per_cu
;
4506 /* Link this CU into read_in_chain. */
4507 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4508 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4513 info_ptr
+= cu
->header
.first_die_offset
;
4516 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4518 /* We try not to read any attributes in this function, because not
4519 all objfiles needed for references have been loaded yet, and symbol
4520 table processing isn't initialized. But we have to set the CU language,
4521 or we won't be able to build types correctly. */
4522 prepare_one_comp_unit (cu
, cu
->dies
);
4524 /* Similarly, if we do not read the producer, we can not apply
4525 producer-specific interpretation. */
4526 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4528 cu
->producer
= DW_STRING (attr
);
4532 do_cleanups (free_abbrevs_cleanup
);
4534 /* We've successfully allocated this compilation unit. Let our
4535 caller clean it up when finished with it. */
4536 discard_cleanups (free_cu_cleanup
);
4540 /* Add a DIE to the delayed physname list. */
4543 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4544 const char *name
, struct die_info
*die
,
4545 struct dwarf2_cu
*cu
)
4547 struct delayed_method_info mi
;
4549 mi
.fnfield_index
= fnfield_index
;
4553 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4556 /* A cleanup for freeing the delayed method list. */
4559 free_delayed_list (void *ptr
)
4561 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4562 if (cu
->method_list
!= NULL
)
4564 VEC_free (delayed_method_info
, cu
->method_list
);
4565 cu
->method_list
= NULL
;
4569 /* Compute the physnames of any methods on the CU's method list.
4571 The computation of method physnames is delayed in order to avoid the
4572 (bad) condition that one of the method's formal parameters is of an as yet
4576 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4579 struct delayed_method_info
*mi
;
4580 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4583 struct fn_fieldlist
*fn_flp
4584 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4585 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4586 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4590 /* Generate full symbol information for PST and CU, whose DIEs have
4591 already been loaded into memory. */
4594 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4596 struct dwarf2_cu
*cu
= per_cu
->cu
;
4597 struct objfile
*objfile
= per_cu
->objfile
;
4598 CORE_ADDR lowpc
, highpc
;
4599 struct symtab
*symtab
;
4600 struct cleanup
*back_to
, *delayed_list_cleanup
;
4603 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4606 back_to
= make_cleanup (really_free_pendings
, NULL
);
4607 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4609 cu
->list_in_scope
= &file_symbols
;
4611 dwarf2_find_base_address (cu
->dies
, cu
);
4613 /* Do line number decoding in read_file_scope () */
4614 process_die (cu
->dies
, cu
);
4616 /* Now that we have processed all the DIEs in the CU, all the types
4617 should be complete, and it should now be safe to compute all of the
4619 compute_delayed_physnames (cu
);
4620 do_cleanups (delayed_list_cleanup
);
4622 /* Some compilers don't define a DW_AT_high_pc attribute for the
4623 compilation unit. If the DW_AT_high_pc is missing, synthesize
4624 it, by scanning the DIE's below the compilation unit. */
4625 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4627 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4629 /* Set symtab language to language from DW_AT_language.
4630 If the compilation is from a C file generated by language preprocessors,
4631 do not set the language if it was already deduced by start_subfile. */
4633 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4635 symtab
->language
= cu
->language
;
4638 if (dwarf2_per_objfile
->using_index
)
4639 per_cu
->v
.quick
->symtab
= symtab
;
4642 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4643 pst
->symtab
= symtab
;
4647 do_cleanups (back_to
);
4650 /* Process a die and its children. */
4653 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4657 case DW_TAG_padding
:
4659 case DW_TAG_compile_unit
:
4660 read_file_scope (die
, cu
);
4662 case DW_TAG_type_unit
:
4663 read_type_unit_scope (die
, cu
);
4665 case DW_TAG_subprogram
:
4666 case DW_TAG_inlined_subroutine
:
4667 read_func_scope (die
, cu
);
4669 case DW_TAG_lexical_block
:
4670 case DW_TAG_try_block
:
4671 case DW_TAG_catch_block
:
4672 read_lexical_block_scope (die
, cu
);
4674 case DW_TAG_class_type
:
4675 case DW_TAG_interface_type
:
4676 case DW_TAG_structure_type
:
4677 case DW_TAG_union_type
:
4678 process_structure_scope (die
, cu
);
4680 case DW_TAG_enumeration_type
:
4681 process_enumeration_scope (die
, cu
);
4684 /* These dies have a type, but processing them does not create
4685 a symbol or recurse to process the children. Therefore we can
4686 read them on-demand through read_type_die. */
4687 case DW_TAG_subroutine_type
:
4688 case DW_TAG_set_type
:
4689 case DW_TAG_array_type
:
4690 case DW_TAG_pointer_type
:
4691 case DW_TAG_ptr_to_member_type
:
4692 case DW_TAG_reference_type
:
4693 case DW_TAG_string_type
:
4696 case DW_TAG_base_type
:
4697 case DW_TAG_subrange_type
:
4698 case DW_TAG_typedef
:
4699 /* Add a typedef symbol for the type definition, if it has a
4701 new_symbol (die
, read_type_die (die
, cu
), cu
);
4703 case DW_TAG_common_block
:
4704 read_common_block (die
, cu
);
4706 case DW_TAG_common_inclusion
:
4708 case DW_TAG_namespace
:
4709 processing_has_namespace_info
= 1;
4710 read_namespace (die
, cu
);
4713 processing_has_namespace_info
= 1;
4714 read_module (die
, cu
);
4716 case DW_TAG_imported_declaration
:
4717 case DW_TAG_imported_module
:
4718 processing_has_namespace_info
= 1;
4719 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4720 || cu
->language
!= language_fortran
))
4721 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4722 dwarf_tag_name (die
->tag
));
4723 read_import_statement (die
, cu
);
4726 new_symbol (die
, NULL
, cu
);
4731 /* A helper function for dwarf2_compute_name which determines whether DIE
4732 needs to have the name of the scope prepended to the name listed in the
4736 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4738 struct attribute
*attr
;
4742 case DW_TAG_namespace
:
4743 case DW_TAG_typedef
:
4744 case DW_TAG_class_type
:
4745 case DW_TAG_interface_type
:
4746 case DW_TAG_structure_type
:
4747 case DW_TAG_union_type
:
4748 case DW_TAG_enumeration_type
:
4749 case DW_TAG_enumerator
:
4750 case DW_TAG_subprogram
:
4754 case DW_TAG_variable
:
4755 case DW_TAG_constant
:
4756 /* We only need to prefix "globally" visible variables. These include
4757 any variable marked with DW_AT_external or any variable that
4758 lives in a namespace. [Variables in anonymous namespaces
4759 require prefixing, but they are not DW_AT_external.] */
4761 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4763 struct dwarf2_cu
*spec_cu
= cu
;
4765 return die_needs_namespace (die_specification (die
, &spec_cu
),
4769 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4770 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4771 && die
->parent
->tag
!= DW_TAG_module
)
4773 /* A variable in a lexical block of some kind does not need a
4774 namespace, even though in C++ such variables may be external
4775 and have a mangled name. */
4776 if (die
->parent
->tag
== DW_TAG_lexical_block
4777 || die
->parent
->tag
== DW_TAG_try_block
4778 || die
->parent
->tag
== DW_TAG_catch_block
4779 || die
->parent
->tag
== DW_TAG_subprogram
)
4788 /* Retrieve the last character from a mem_file. */
4791 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4793 char *last_char_p
= (char *) object
;
4796 *last_char_p
= buffer
[length
- 1];
4799 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4800 compute the physname for the object, which include a method's
4801 formal parameters (C++/Java) and return type (Java).
4803 For Ada, return the DIE's linkage name rather than the fully qualified
4804 name. PHYSNAME is ignored..
4806 The result is allocated on the objfile_obstack and canonicalized. */
4809 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4813 name
= dwarf2_name (die
, cu
);
4815 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4816 compute it by typename_concat inside GDB. */
4817 if (cu
->language
== language_ada
4818 || (cu
->language
== language_fortran
&& physname
))
4820 /* For Ada unit, we prefer the linkage name over the name, as
4821 the former contains the exported name, which the user expects
4822 to be able to reference. Ideally, we want the user to be able
4823 to reference this entity using either natural or linkage name,
4824 but we haven't started looking at this enhancement yet. */
4825 struct attribute
*attr
;
4827 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4829 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4830 if (attr
&& DW_STRING (attr
))
4831 return DW_STRING (attr
);
4834 /* These are the only languages we know how to qualify names in. */
4836 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4837 || cu
->language
== language_fortran
))
4839 if (die_needs_namespace (die
, cu
))
4843 struct ui_file
*buf
;
4845 prefix
= determine_prefix (die
, cu
);
4846 buf
= mem_fileopen ();
4847 if (*prefix
!= '\0')
4849 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4852 fputs_unfiltered (prefixed_name
, buf
);
4853 xfree (prefixed_name
);
4856 fputs_unfiltered (name
, buf
);
4858 /* Template parameters may be specified in the DIE's DW_AT_name, or
4859 as children with DW_TAG_template_type_param or
4860 DW_TAG_value_type_param. If the latter, add them to the name
4861 here. If the name already has template parameters, then
4862 skip this step; some versions of GCC emit both, and
4863 it is more efficient to use the pre-computed name.
4865 Something to keep in mind about this process: it is very
4866 unlikely, or in some cases downright impossible, to produce
4867 something that will match the mangled name of a function.
4868 If the definition of the function has the same debug info,
4869 we should be able to match up with it anyway. But fallbacks
4870 using the minimal symbol, for instance to find a method
4871 implemented in a stripped copy of libstdc++, will not work.
4872 If we do not have debug info for the definition, we will have to
4873 match them up some other way.
4875 When we do name matching there is a related problem with function
4876 templates; two instantiated function templates are allowed to
4877 differ only by their return types, which we do not add here. */
4879 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4881 struct attribute
*attr
;
4882 struct die_info
*child
;
4885 die
->building_fullname
= 1;
4887 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4892 struct dwarf2_locexpr_baton
*baton
;
4895 if (child
->tag
!= DW_TAG_template_type_param
4896 && child
->tag
!= DW_TAG_template_value_param
)
4901 fputs_unfiltered ("<", buf
);
4905 fputs_unfiltered (", ", buf
);
4907 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4910 complaint (&symfile_complaints
,
4911 _("template parameter missing DW_AT_type"));
4912 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4915 type
= die_type (child
, cu
);
4917 if (child
->tag
== DW_TAG_template_type_param
)
4919 c_print_type (type
, "", buf
, -1, 0);
4923 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4926 complaint (&symfile_complaints
,
4927 _("template parameter missing "
4928 "DW_AT_const_value"));
4929 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4933 dwarf2_const_value_attr (attr
, type
, name
,
4934 &cu
->comp_unit_obstack
, cu
,
4935 &value
, &bytes
, &baton
);
4937 if (TYPE_NOSIGN (type
))
4938 /* GDB prints characters as NUMBER 'CHAR'. If that's
4939 changed, this can use value_print instead. */
4940 c_printchar (value
, type
, buf
);
4943 struct value_print_options opts
;
4946 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4950 else if (bytes
!= NULL
)
4952 v
= allocate_value (type
);
4953 memcpy (value_contents_writeable (v
), bytes
,
4954 TYPE_LENGTH (type
));
4957 v
= value_from_longest (type
, value
);
4959 /* Specify decimal so that we do not depend on
4961 get_formatted_print_options (&opts
, 'd');
4963 value_print (v
, buf
, &opts
);
4969 die
->building_fullname
= 0;
4973 /* Close the argument list, with a space if necessary
4974 (nested templates). */
4975 char last_char
= '\0';
4976 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4977 if (last_char
== '>')
4978 fputs_unfiltered (" >", buf
);
4980 fputs_unfiltered (">", buf
);
4984 /* For Java and C++ methods, append formal parameter type
4985 information, if PHYSNAME. */
4987 if (physname
&& die
->tag
== DW_TAG_subprogram
4988 && (cu
->language
== language_cplus
4989 || cu
->language
== language_java
))
4991 struct type
*type
= read_type_die (die
, cu
);
4993 c_type_print_args (type
, buf
, 0, cu
->language
);
4995 if (cu
->language
== language_java
)
4997 /* For java, we must append the return type to method
4999 if (die
->tag
== DW_TAG_subprogram
)
5000 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
5003 else if (cu
->language
== language_cplus
)
5005 /* Assume that an artificial first parameter is
5006 "this", but do not crash if it is not. RealView
5007 marks unnamed (and thus unused) parameters as
5008 artificial; there is no way to differentiate
5010 if (TYPE_NFIELDS (type
) > 0
5011 && TYPE_FIELD_ARTIFICIAL (type
, 0)
5012 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
5013 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
5015 fputs_unfiltered (" const", buf
);
5019 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
5021 ui_file_delete (buf
);
5023 if (cu
->language
== language_cplus
)
5026 = dwarf2_canonicalize_name (name
, cu
,
5027 &cu
->objfile
->objfile_obstack
);
5038 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5039 If scope qualifiers are appropriate they will be added. The result
5040 will be allocated on the objfile_obstack, or NULL if the DIE does
5041 not have a name. NAME may either be from a previous call to
5042 dwarf2_name or NULL.
5044 The output string will be canonicalized (if C++/Java). */
5047 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5049 return dwarf2_compute_name (name
, die
, cu
, 0);
5052 /* Construct a physname for the given DIE in CU. NAME may either be
5053 from a previous call to dwarf2_name or NULL. The result will be
5054 allocated on the objfile_objstack or NULL if the DIE does not have a
5057 The output string will be canonicalized (if C++/Java). */
5060 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5062 return dwarf2_compute_name (name
, die
, cu
, 1);
5065 /* Read the import statement specified by the given die and record it. */
5068 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
5070 struct attribute
*import_attr
;
5071 struct die_info
*imported_die
;
5072 struct dwarf2_cu
*imported_cu
;
5073 const char *imported_name
;
5074 const char *imported_name_prefix
;
5075 const char *canonical_name
;
5076 const char *import_alias
;
5077 const char *imported_declaration
= NULL
;
5078 const char *import_prefix
;
5082 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5083 if (import_attr
== NULL
)
5085 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5086 dwarf_tag_name (die
->tag
));
5091 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
5092 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5093 if (imported_name
== NULL
)
5095 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5097 The import in the following code:
5111 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5112 <52> DW_AT_decl_file : 1
5113 <53> DW_AT_decl_line : 6
5114 <54> DW_AT_import : <0x75>
5115 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5117 <5b> DW_AT_decl_file : 1
5118 <5c> DW_AT_decl_line : 2
5119 <5d> DW_AT_type : <0x6e>
5121 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5122 <76> DW_AT_byte_size : 4
5123 <77> DW_AT_encoding : 5 (signed)
5125 imports the wrong die ( 0x75 instead of 0x58 ).
5126 This case will be ignored until the gcc bug is fixed. */
5130 /* Figure out the local name after import. */
5131 import_alias
= dwarf2_name (die
, cu
);
5133 /* Figure out where the statement is being imported to. */
5134 import_prefix
= determine_prefix (die
, cu
);
5136 /* Figure out what the scope of the imported die is and prepend it
5137 to the name of the imported die. */
5138 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5140 if (imported_die
->tag
!= DW_TAG_namespace
5141 && imported_die
->tag
!= DW_TAG_module
)
5143 imported_declaration
= imported_name
;
5144 canonical_name
= imported_name_prefix
;
5146 else if (strlen (imported_name_prefix
) > 0)
5148 temp
= alloca (strlen (imported_name_prefix
)
5149 + 2 + strlen (imported_name
) + 1);
5150 strcpy (temp
, imported_name_prefix
);
5151 strcat (temp
, "::");
5152 strcat (temp
, imported_name
);
5153 canonical_name
= temp
;
5156 canonical_name
= imported_name
;
5158 cp_add_using_directive (import_prefix
,
5161 imported_declaration
,
5162 &cu
->objfile
->objfile_obstack
);
5166 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5168 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5171 /* Cleanup function for read_file_scope. */
5174 free_cu_line_header (void *arg
)
5176 struct dwarf2_cu
*cu
= arg
;
5178 free_line_header (cu
->line_header
);
5179 cu
->line_header
= NULL
;
5183 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5184 char **name
, char **comp_dir
)
5186 struct attribute
*attr
;
5191 /* Find the filename. Do not use dwarf2_name here, since the filename
5192 is not a source language identifier. */
5193 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5196 *name
= DW_STRING (attr
);
5199 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5201 *comp_dir
= DW_STRING (attr
);
5202 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5204 *comp_dir
= ldirname (*name
);
5205 if (*comp_dir
!= NULL
)
5206 make_cleanup (xfree
, *comp_dir
);
5208 if (*comp_dir
!= NULL
)
5210 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5211 directory, get rid of it. */
5212 char *cp
= strchr (*comp_dir
, ':');
5214 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5219 *name
= "<unknown>";
5222 /* Process DW_TAG_compile_unit. */
5225 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5227 struct objfile
*objfile
= cu
->objfile
;
5228 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5229 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5230 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5231 struct attribute
*attr
;
5233 char *comp_dir
= NULL
;
5234 struct die_info
*child_die
;
5235 bfd
*abfd
= objfile
->obfd
;
5236 struct line_header
*line_header
= 0;
5239 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5241 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5243 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5244 from finish_block. */
5245 if (lowpc
== ((CORE_ADDR
) -1))
5250 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5252 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5255 set_cu_language (DW_UNSND (attr
), cu
);
5258 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5260 cu
->producer
= DW_STRING (attr
);
5262 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5263 standardised yet. As a workaround for the language detection we fall
5264 back to the DW_AT_producer string. */
5265 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5266 cu
->language
= language_opencl
;
5268 /* We assume that we're processing GCC output. */
5269 processing_gcc_compilation
= 2;
5271 processing_has_namespace_info
= 0;
5273 start_symtab (name
, comp_dir
, lowpc
);
5274 record_debugformat ("DWARF 2");
5275 record_producer (cu
->producer
);
5277 initialize_cu_func_list (cu
);
5279 /* Decode line number information if present. We do this before
5280 processing child DIEs, so that the line header table is available
5281 for DW_AT_decl_file. */
5282 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5285 unsigned int line_offset
= DW_UNSND (attr
);
5286 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5289 cu
->line_header
= line_header
;
5290 make_cleanup (free_cu_line_header
, cu
);
5291 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5295 /* Process all dies in compilation unit. */
5296 if (die
->child
!= NULL
)
5298 child_die
= die
->child
;
5299 while (child_die
&& child_die
->tag
)
5301 process_die (child_die
, cu
);
5302 child_die
= sibling_die (child_die
);
5306 /* Decode macro information, if present. Dwarf 2 macro information
5307 refers to information in the line number info statement program
5308 header, so we can only read it if we've read the header
5310 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5311 if (attr
&& line_header
)
5313 unsigned int macro_offset
= DW_UNSND (attr
);
5315 dwarf_decode_macros (line_header
, macro_offset
,
5316 comp_dir
, abfd
, cu
);
5318 do_cleanups (back_to
);
5321 /* Process DW_TAG_type_unit.
5322 For TUs we want to skip the first top level sibling if it's not the
5323 actual type being defined by this TU. In this case the first top
5324 level sibling is there to provide context only. */
5327 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5329 struct objfile
*objfile
= cu
->objfile
;
5330 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5332 struct attribute
*attr
;
5334 char *comp_dir
= NULL
;
5335 struct die_info
*child_die
;
5336 bfd
*abfd
= objfile
->obfd
;
5338 /* start_symtab needs a low pc, but we don't really have one.
5339 Do what read_file_scope would do in the absence of such info. */
5340 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5342 /* Find the filename. Do not use dwarf2_name here, since the filename
5343 is not a source language identifier. */
5344 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5346 name
= DW_STRING (attr
);
5348 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5350 comp_dir
= DW_STRING (attr
);
5351 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5353 comp_dir
= ldirname (name
);
5354 if (comp_dir
!= NULL
)
5355 make_cleanup (xfree
, comp_dir
);
5361 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5363 set_cu_language (DW_UNSND (attr
), cu
);
5365 /* This isn't technically needed today. It is done for symmetry
5366 with read_file_scope. */
5367 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5369 cu
->producer
= DW_STRING (attr
);
5371 /* We assume that we're processing GCC output. */
5372 processing_gcc_compilation
= 2;
5374 processing_has_namespace_info
= 0;
5376 start_symtab (name
, comp_dir
, lowpc
);
5377 record_debugformat ("DWARF 2");
5378 record_producer (cu
->producer
);
5380 /* Process the dies in the type unit. */
5381 if (die
->child
== NULL
)
5383 dump_die_for_error (die
);
5384 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5385 bfd_get_filename (abfd
));
5388 child_die
= die
->child
;
5390 while (child_die
&& child_die
->tag
)
5392 process_die (child_die
, cu
);
5394 child_die
= sibling_die (child_die
);
5397 do_cleanups (back_to
);
5401 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5402 struct dwarf2_cu
*cu
)
5404 struct function_range
*thisfn
;
5406 thisfn
= (struct function_range
*)
5407 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5408 thisfn
->name
= name
;
5409 thisfn
->lowpc
= lowpc
;
5410 thisfn
->highpc
= highpc
;
5411 thisfn
->seen_line
= 0;
5412 thisfn
->next
= NULL
;
5414 if (cu
->last_fn
== NULL
)
5415 cu
->first_fn
= thisfn
;
5417 cu
->last_fn
->next
= thisfn
;
5419 cu
->last_fn
= thisfn
;
5422 /* qsort helper for inherit_abstract_dies. */
5425 unsigned_int_compar (const void *ap
, const void *bp
)
5427 unsigned int a
= *(unsigned int *) ap
;
5428 unsigned int b
= *(unsigned int *) bp
;
5430 return (a
> b
) - (b
> a
);
5433 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5434 Inherit only the children of the DW_AT_abstract_origin DIE not being
5435 already referenced by DW_AT_abstract_origin from the children of the
5439 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5441 struct die_info
*child_die
;
5442 unsigned die_children_count
;
5443 /* CU offsets which were referenced by children of the current DIE. */
5445 unsigned *offsets_end
, *offsetp
;
5446 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5447 struct die_info
*origin_die
;
5448 /* Iterator of the ORIGIN_DIE children. */
5449 struct die_info
*origin_child_die
;
5450 struct cleanup
*cleanups
;
5451 struct attribute
*attr
;
5452 struct dwarf2_cu
*origin_cu
;
5453 struct pending
**origin_previous_list_in_scope
;
5455 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5459 /* Note that following die references may follow to a die in a
5463 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5465 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5467 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5468 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5470 if (die
->tag
!= origin_die
->tag
5471 && !(die
->tag
== DW_TAG_inlined_subroutine
5472 && origin_die
->tag
== DW_TAG_subprogram
))
5473 complaint (&symfile_complaints
,
5474 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5475 die
->offset
, origin_die
->offset
);
5477 child_die
= die
->child
;
5478 die_children_count
= 0;
5479 while (child_die
&& child_die
->tag
)
5481 child_die
= sibling_die (child_die
);
5482 die_children_count
++;
5484 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5485 cleanups
= make_cleanup (xfree
, offsets
);
5487 offsets_end
= offsets
;
5488 child_die
= die
->child
;
5489 while (child_die
&& child_die
->tag
)
5491 /* For each CHILD_DIE, find the corresponding child of
5492 ORIGIN_DIE. If there is more than one layer of
5493 DW_AT_abstract_origin, follow them all; there shouldn't be,
5494 but GCC versions at least through 4.4 generate this (GCC PR
5496 struct die_info
*child_origin_die
= child_die
;
5497 struct dwarf2_cu
*child_origin_cu
= cu
;
5501 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5505 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5509 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5510 counterpart may exist. */
5511 if (child_origin_die
!= child_die
)
5513 if (child_die
->tag
!= child_origin_die
->tag
5514 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5515 && child_origin_die
->tag
== DW_TAG_subprogram
))
5516 complaint (&symfile_complaints
,
5517 _("Child DIE 0x%x and its abstract origin 0x%x have "
5518 "different tags"), child_die
->offset
,
5519 child_origin_die
->offset
);
5520 if (child_origin_die
->parent
!= origin_die
)
5521 complaint (&symfile_complaints
,
5522 _("Child DIE 0x%x and its abstract origin 0x%x have "
5523 "different parents"), child_die
->offset
,
5524 child_origin_die
->offset
);
5526 *offsets_end
++ = child_origin_die
->offset
;
5528 child_die
= sibling_die (child_die
);
5530 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5531 unsigned_int_compar
);
5532 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5533 if (offsetp
[-1] == *offsetp
)
5534 complaint (&symfile_complaints
,
5535 _("Multiple children of DIE 0x%x refer "
5536 "to DIE 0x%x as their abstract origin"),
5537 die
->offset
, *offsetp
);
5540 origin_child_die
= origin_die
->child
;
5541 while (origin_child_die
&& origin_child_die
->tag
)
5543 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5544 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5546 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5548 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5549 process_die (origin_child_die
, origin_cu
);
5551 origin_child_die
= sibling_die (origin_child_die
);
5553 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5555 do_cleanups (cleanups
);
5559 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5561 struct objfile
*objfile
= cu
->objfile
;
5562 struct context_stack
*new;
5565 struct die_info
*child_die
;
5566 struct attribute
*attr
, *call_line
, *call_file
;
5569 struct block
*block
;
5570 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5571 VEC (symbolp
) *template_args
= NULL
;
5572 struct template_symbol
*templ_func
= NULL
;
5576 /* If we do not have call site information, we can't show the
5577 caller of this inlined function. That's too confusing, so
5578 only use the scope for local variables. */
5579 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5580 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5581 if (call_line
== NULL
|| call_file
== NULL
)
5583 read_lexical_block_scope (die
, cu
);
5588 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5590 name
= dwarf2_name (die
, cu
);
5592 /* Ignore functions with missing or empty names. These are actually
5593 illegal according to the DWARF standard. */
5596 complaint (&symfile_complaints
,
5597 _("missing name for subprogram DIE at %d"), die
->offset
);
5601 /* Ignore functions with missing or invalid low and high pc attributes. */
5602 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5604 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5605 if (!attr
|| !DW_UNSND (attr
))
5606 complaint (&symfile_complaints
,
5607 _("cannot get low and high bounds "
5608 "for subprogram DIE at %d"),
5616 /* Record the function range for dwarf_decode_lines. */
5617 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5619 /* If we have any template arguments, then we must allocate a
5620 different sort of symbol. */
5621 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5623 if (child_die
->tag
== DW_TAG_template_type_param
5624 || child_die
->tag
== DW_TAG_template_value_param
)
5626 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5627 struct template_symbol
);
5628 templ_func
->base
.is_cplus_template_function
= 1;
5633 new = push_context (0, lowpc
);
5634 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5635 (struct symbol
*) templ_func
);
5637 /* If there is a location expression for DW_AT_frame_base, record
5639 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5641 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5642 expression is being recorded directly in the function's symbol
5643 and not in a separate frame-base object. I guess this hack is
5644 to avoid adding some sort of frame-base adjunct/annex to the
5645 function's symbol :-(. The problem with doing this is that it
5646 results in a function symbol with a location expression that
5647 has nothing to do with the location of the function, ouch! The
5648 relationship should be: a function's symbol has-a frame base; a
5649 frame-base has-a location expression. */
5650 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5652 cu
->list_in_scope
= &local_symbols
;
5654 if (die
->child
!= NULL
)
5656 child_die
= die
->child
;
5657 while (child_die
&& child_die
->tag
)
5659 if (child_die
->tag
== DW_TAG_template_type_param
5660 || child_die
->tag
== DW_TAG_template_value_param
)
5662 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5665 VEC_safe_push (symbolp
, template_args
, arg
);
5668 process_die (child_die
, cu
);
5669 child_die
= sibling_die (child_die
);
5673 inherit_abstract_dies (die
, cu
);
5675 /* If we have a DW_AT_specification, we might need to import using
5676 directives from the context of the specification DIE. See the
5677 comment in determine_prefix. */
5678 if (cu
->language
== language_cplus
5679 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5681 struct dwarf2_cu
*spec_cu
= cu
;
5682 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5686 child_die
= spec_die
->child
;
5687 while (child_die
&& child_die
->tag
)
5689 if (child_die
->tag
== DW_TAG_imported_module
)
5690 process_die (child_die
, spec_cu
);
5691 child_die
= sibling_die (child_die
);
5694 /* In some cases, GCC generates specification DIEs that
5695 themselves contain DW_AT_specification attributes. */
5696 spec_die
= die_specification (spec_die
, &spec_cu
);
5700 new = pop_context ();
5701 /* Make a block for the local symbols within. */
5702 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5703 lowpc
, highpc
, objfile
);
5705 /* For C++, set the block's scope. */
5706 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5707 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5708 determine_prefix (die
, cu
),
5709 processing_has_namespace_info
);
5711 /* If we have address ranges, record them. */
5712 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5714 /* Attach template arguments to function. */
5715 if (! VEC_empty (symbolp
, template_args
))
5717 gdb_assert (templ_func
!= NULL
);
5719 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5720 templ_func
->template_arguments
5721 = obstack_alloc (&objfile
->objfile_obstack
,
5722 (templ_func
->n_template_arguments
5723 * sizeof (struct symbol
*)));
5724 memcpy (templ_func
->template_arguments
,
5725 VEC_address (symbolp
, template_args
),
5726 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5727 VEC_free (symbolp
, template_args
);
5730 /* In C++, we can have functions nested inside functions (e.g., when
5731 a function declares a class that has methods). This means that
5732 when we finish processing a function scope, we may need to go
5733 back to building a containing block's symbol lists. */
5734 local_symbols
= new->locals
;
5735 param_symbols
= new->params
;
5736 using_directives
= new->using_directives
;
5738 /* If we've finished processing a top-level function, subsequent
5739 symbols go in the file symbol list. */
5740 if (outermost_context_p ())
5741 cu
->list_in_scope
= &file_symbols
;
5744 /* Process all the DIES contained within a lexical block scope. Start
5745 a new scope, process the dies, and then close the scope. */
5748 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5750 struct objfile
*objfile
= cu
->objfile
;
5751 struct context_stack
*new;
5752 CORE_ADDR lowpc
, highpc
;
5753 struct die_info
*child_die
;
5756 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5758 /* Ignore blocks with missing or invalid low and high pc attributes. */
5759 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5760 as multiple lexical blocks? Handling children in a sane way would
5761 be nasty. Might be easier to properly extend generic blocks to
5763 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5768 push_context (0, lowpc
);
5769 if (die
->child
!= NULL
)
5771 child_die
= die
->child
;
5772 while (child_die
&& child_die
->tag
)
5774 process_die (child_die
, cu
);
5775 child_die
= sibling_die (child_die
);
5778 new = pop_context ();
5780 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5783 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5786 /* Note that recording ranges after traversing children, as we
5787 do here, means that recording a parent's ranges entails
5788 walking across all its children's ranges as they appear in
5789 the address map, which is quadratic behavior.
5791 It would be nicer to record the parent's ranges before
5792 traversing its children, simply overriding whatever you find
5793 there. But since we don't even decide whether to create a
5794 block until after we've traversed its children, that's hard
5796 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5798 local_symbols
= new->locals
;
5799 using_directives
= new->using_directives
;
5802 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5803 Return 1 if the attributes are present and valid, otherwise, return 0.
5804 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5807 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5808 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5809 struct partial_symtab
*ranges_pst
)
5811 struct objfile
*objfile
= cu
->objfile
;
5812 struct comp_unit_head
*cu_header
= &cu
->header
;
5813 bfd
*obfd
= objfile
->obfd
;
5814 unsigned int addr_size
= cu_header
->addr_size
;
5815 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5816 /* Base address selection entry. */
5827 found_base
= cu
->base_known
;
5828 base
= cu
->base_address
;
5830 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5831 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5833 complaint (&symfile_complaints
,
5834 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5838 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5840 /* Read in the largest possible address. */
5841 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5842 if ((marker
& mask
) == mask
)
5844 /* If we found the largest possible address, then
5845 read the base address. */
5846 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5847 buffer
+= 2 * addr_size
;
5848 offset
+= 2 * addr_size
;
5854 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5858 CORE_ADDR range_beginning
, range_end
;
5860 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5861 buffer
+= addr_size
;
5862 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5863 buffer
+= addr_size
;
5864 offset
+= 2 * addr_size
;
5866 /* An end of list marker is a pair of zero addresses. */
5867 if (range_beginning
== 0 && range_end
== 0)
5868 /* Found the end of list entry. */
5871 /* Each base address selection entry is a pair of 2 values.
5872 The first is the largest possible address, the second is
5873 the base address. Check for a base address here. */
5874 if ((range_beginning
& mask
) == mask
)
5876 /* If we found the largest possible address, then
5877 read the base address. */
5878 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5885 /* We have no valid base address for the ranges
5887 complaint (&symfile_complaints
,
5888 _("Invalid .debug_ranges data (no base address)"));
5892 if (range_beginning
> range_end
)
5894 /* Inverted range entries are invalid. */
5895 complaint (&symfile_complaints
,
5896 _("Invalid .debug_ranges data (inverted range)"));
5900 /* Empty range entries have no effect. */
5901 if (range_beginning
== range_end
)
5904 range_beginning
+= base
;
5907 if (ranges_pst
!= NULL
)
5908 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5909 range_beginning
+ baseaddr
,
5910 range_end
- 1 + baseaddr
,
5913 /* FIXME: This is recording everything as a low-high
5914 segment of consecutive addresses. We should have a
5915 data structure for discontiguous block ranges
5919 low
= range_beginning
;
5925 if (range_beginning
< low
)
5926 low
= range_beginning
;
5927 if (range_end
> high
)
5933 /* If the first entry is an end-of-list marker, the range
5934 describes an empty scope, i.e. no instructions. */
5940 *high_return
= high
;
5944 /* Get low and high pc attributes from a die. Return 1 if the attributes
5945 are present and valid, otherwise, return 0. Return -1 if the range is
5946 discontinuous, i.e. derived from DW_AT_ranges information. */
5948 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5949 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5950 struct partial_symtab
*pst
)
5952 struct attribute
*attr
;
5957 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5960 high
= DW_ADDR (attr
);
5961 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5963 low
= DW_ADDR (attr
);
5965 /* Found high w/o low attribute. */
5968 /* Found consecutive range of addresses. */
5973 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5976 /* Value of the DW_AT_ranges attribute is the offset in the
5977 .debug_ranges section. */
5978 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5980 /* Found discontinuous range of addresses. */
5988 /* When using the GNU linker, .gnu.linkonce. sections are used to
5989 eliminate duplicate copies of functions and vtables and such.
5990 The linker will arbitrarily choose one and discard the others.
5991 The AT_*_pc values for such functions refer to local labels in
5992 these sections. If the section from that file was discarded, the
5993 labels are not in the output, so the relocs get a value of 0.
5994 If this is a discarded function, mark the pc bounds as invalid,
5995 so that GDB will ignore it. */
5996 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
6004 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
6005 its low and high PC addresses. Do nothing if these addresses could not
6006 be determined. Otherwise, set LOWPC to the low address if it is smaller,
6007 and HIGHPC to the high address if greater than HIGHPC. */
6010 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
6011 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6012 struct dwarf2_cu
*cu
)
6014 CORE_ADDR low
, high
;
6015 struct die_info
*child
= die
->child
;
6017 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
6019 *lowpc
= min (*lowpc
, low
);
6020 *highpc
= max (*highpc
, high
);
6023 /* If the language does not allow nested subprograms (either inside
6024 subprograms or lexical blocks), we're done. */
6025 if (cu
->language
!= language_ada
)
6028 /* Check all the children of the given DIE. If it contains nested
6029 subprograms, then check their pc bounds. Likewise, we need to
6030 check lexical blocks as well, as they may also contain subprogram
6032 while (child
&& child
->tag
)
6034 if (child
->tag
== DW_TAG_subprogram
6035 || child
->tag
== DW_TAG_lexical_block
)
6036 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
6037 child
= sibling_die (child
);
6041 /* Get the low and high pc's represented by the scope DIE, and store
6042 them in *LOWPC and *HIGHPC. If the correct values can't be
6043 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6046 get_scope_pc_bounds (struct die_info
*die
,
6047 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6048 struct dwarf2_cu
*cu
)
6050 CORE_ADDR best_low
= (CORE_ADDR
) -1;
6051 CORE_ADDR best_high
= (CORE_ADDR
) 0;
6052 CORE_ADDR current_low
, current_high
;
6054 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
6056 best_low
= current_low
;
6057 best_high
= current_high
;
6061 struct die_info
*child
= die
->child
;
6063 while (child
&& child
->tag
)
6065 switch (child
->tag
) {
6066 case DW_TAG_subprogram
:
6067 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
6069 case DW_TAG_namespace
:
6071 /* FIXME: carlton/2004-01-16: Should we do this for
6072 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6073 that current GCC's always emit the DIEs corresponding
6074 to definitions of methods of classes as children of a
6075 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6076 the DIEs giving the declarations, which could be
6077 anywhere). But I don't see any reason why the
6078 standards says that they have to be there. */
6079 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
6081 if (current_low
!= ((CORE_ADDR
) -1))
6083 best_low
= min (best_low
, current_low
);
6084 best_high
= max (best_high
, current_high
);
6092 child
= sibling_die (child
);
6097 *highpc
= best_high
;
6100 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6103 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
6104 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
6106 struct attribute
*attr
;
6108 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6111 CORE_ADDR high
= DW_ADDR (attr
);
6113 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6116 CORE_ADDR low
= DW_ADDR (attr
);
6118 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
6122 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6125 bfd
*obfd
= cu
->objfile
->obfd
;
6127 /* The value of the DW_AT_ranges attribute is the offset of the
6128 address range list in the .debug_ranges section. */
6129 unsigned long offset
= DW_UNSND (attr
);
6130 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6132 /* For some target architectures, but not others, the
6133 read_address function sign-extends the addresses it returns.
6134 To recognize base address selection entries, we need a
6136 unsigned int addr_size
= cu
->header
.addr_size
;
6137 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6139 /* The base address, to which the next pair is relative. Note
6140 that this 'base' is a DWARF concept: most entries in a range
6141 list are relative, to reduce the number of relocs against the
6142 debugging information. This is separate from this function's
6143 'baseaddr' argument, which GDB uses to relocate debugging
6144 information from a shared library based on the address at
6145 which the library was loaded. */
6146 CORE_ADDR base
= cu
->base_address
;
6147 int base_known
= cu
->base_known
;
6149 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
6150 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6152 complaint (&symfile_complaints
,
6153 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6160 unsigned int bytes_read
;
6161 CORE_ADDR start
, end
;
6163 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6164 buffer
+= bytes_read
;
6165 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6166 buffer
+= bytes_read
;
6168 /* Did we find the end of the range list? */
6169 if (start
== 0 && end
== 0)
6172 /* Did we find a base address selection entry? */
6173 else if ((start
& base_select_mask
) == base_select_mask
)
6179 /* We found an ordinary address range. */
6184 complaint (&symfile_complaints
,
6185 _("Invalid .debug_ranges data "
6186 "(no base address)"));
6192 /* Inverted range entries are invalid. */
6193 complaint (&symfile_complaints
,
6194 _("Invalid .debug_ranges data "
6195 "(inverted range)"));
6199 /* Empty range entries have no effect. */
6203 record_block_range (block
,
6204 baseaddr
+ base
+ start
,
6205 baseaddr
+ base
+ end
- 1);
6211 /* Add an aggregate field to the field list. */
6214 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6215 struct dwarf2_cu
*cu
)
6217 struct objfile
*objfile
= cu
->objfile
;
6218 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6219 struct nextfield
*new_field
;
6220 struct attribute
*attr
;
6222 char *fieldname
= "";
6224 /* Allocate a new field list entry and link it in. */
6225 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6226 make_cleanup (xfree
, new_field
);
6227 memset (new_field
, 0, sizeof (struct nextfield
));
6229 if (die
->tag
== DW_TAG_inheritance
)
6231 new_field
->next
= fip
->baseclasses
;
6232 fip
->baseclasses
= new_field
;
6236 new_field
->next
= fip
->fields
;
6237 fip
->fields
= new_field
;
6241 if (cu
->header
.version
< 3)
6243 /* The default DWARF 2 accessibility for members is public, the default
6244 accessibility for inheritance is private. */
6246 if (die
->tag
!= DW_TAG_inheritance
)
6247 new_field
->accessibility
= DW_ACCESS_public
;
6249 new_field
->accessibility
= DW_ACCESS_private
;
6253 /* DWARF 3 specifies the default accessibility explicitly. */
6255 if (die
->parent
->tag
== DW_TAG_class_type
)
6256 new_field
->accessibility
= DW_ACCESS_private
;
6258 new_field
->accessibility
= DW_ACCESS_public
;
6260 new_field
->virtuality
= DW_VIRTUALITY_none
;
6262 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6264 new_field
->accessibility
= DW_UNSND (attr
);
6265 if (new_field
->accessibility
!= DW_ACCESS_public
)
6266 fip
->non_public_fields
= 1;
6267 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6269 new_field
->virtuality
= DW_UNSND (attr
);
6271 fp
= &new_field
->field
;
6273 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6275 /* Data member other than a C++ static data member. */
6277 /* Get type of field. */
6278 fp
->type
= die_type (die
, cu
);
6280 SET_FIELD_BITPOS (*fp
, 0);
6282 /* Get bit size of field (zero if none). */
6283 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6286 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6290 FIELD_BITSIZE (*fp
) = 0;
6293 /* Get bit offset of field. */
6294 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6297 int byte_offset
= 0;
6299 if (attr_form_is_section_offset (attr
))
6300 dwarf2_complex_location_expr_complaint ();
6301 else if (attr_form_is_constant (attr
))
6302 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6303 else if (attr_form_is_block (attr
))
6304 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6306 dwarf2_complex_location_expr_complaint ();
6308 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6310 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6313 if (gdbarch_bits_big_endian (gdbarch
))
6315 /* For big endian bits, the DW_AT_bit_offset gives the
6316 additional bit offset from the MSB of the containing
6317 anonymous object to the MSB of the field. We don't
6318 have to do anything special since we don't need to
6319 know the size of the anonymous object. */
6320 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6324 /* For little endian bits, compute the bit offset to the
6325 MSB of the anonymous object, subtract off the number of
6326 bits from the MSB of the field to the MSB of the
6327 object, and then subtract off the number of bits of
6328 the field itself. The result is the bit offset of
6329 the LSB of the field. */
6331 int bit_offset
= DW_UNSND (attr
);
6333 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6336 /* The size of the anonymous object containing
6337 the bit field is explicit, so use the
6338 indicated size (in bytes). */
6339 anonymous_size
= DW_UNSND (attr
);
6343 /* The size of the anonymous object containing
6344 the bit field must be inferred from the type
6345 attribute of the data member containing the
6347 anonymous_size
= TYPE_LENGTH (fp
->type
);
6349 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6350 - bit_offset
- FIELD_BITSIZE (*fp
);
6354 /* Get name of field. */
6355 fieldname
= dwarf2_name (die
, cu
);
6356 if (fieldname
== NULL
)
6359 /* The name is already allocated along with this objfile, so we don't
6360 need to duplicate it for the type. */
6361 fp
->name
= fieldname
;
6363 /* Change accessibility for artificial fields (e.g. virtual table
6364 pointer or virtual base class pointer) to private. */
6365 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6367 FIELD_ARTIFICIAL (*fp
) = 1;
6368 new_field
->accessibility
= DW_ACCESS_private
;
6369 fip
->non_public_fields
= 1;
6372 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6374 /* C++ static member. */
6376 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6377 is a declaration, but all versions of G++ as of this writing
6378 (so through at least 3.2.1) incorrectly generate
6379 DW_TAG_variable tags. */
6383 /* Get name of field. */
6384 fieldname
= dwarf2_name (die
, cu
);
6385 if (fieldname
== NULL
)
6388 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6390 /* Only create a symbol if this is an external value.
6391 new_symbol checks this and puts the value in the global symbol
6392 table, which we want. If it is not external, new_symbol
6393 will try to put the value in cu->list_in_scope which is wrong. */
6394 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6396 /* A static const member, not much different than an enum as far as
6397 we're concerned, except that we can support more types. */
6398 new_symbol (die
, NULL
, cu
);
6401 /* Get physical name. */
6402 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6404 /* The name is already allocated along with this objfile, so we don't
6405 need to duplicate it for the type. */
6406 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6407 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6408 FIELD_NAME (*fp
) = fieldname
;
6410 else if (die
->tag
== DW_TAG_inheritance
)
6412 /* C++ base class field. */
6413 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6416 int byte_offset
= 0;
6418 if (attr_form_is_section_offset (attr
))
6419 dwarf2_complex_location_expr_complaint ();
6420 else if (attr_form_is_constant (attr
))
6421 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6422 else if (attr_form_is_block (attr
))
6423 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6425 dwarf2_complex_location_expr_complaint ();
6427 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6429 FIELD_BITSIZE (*fp
) = 0;
6430 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6431 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6432 fip
->nbaseclasses
++;
6436 /* Add a typedef defined in the scope of the FIP's class. */
6439 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6440 struct dwarf2_cu
*cu
)
6442 struct objfile
*objfile
= cu
->objfile
;
6443 struct typedef_field_list
*new_field
;
6444 struct attribute
*attr
;
6445 struct typedef_field
*fp
;
6446 char *fieldname
= "";
6448 /* Allocate a new field list entry and link it in. */
6449 new_field
= xzalloc (sizeof (*new_field
));
6450 make_cleanup (xfree
, new_field
);
6452 gdb_assert (die
->tag
== DW_TAG_typedef
);
6454 fp
= &new_field
->field
;
6456 /* Get name of field. */
6457 fp
->name
= dwarf2_name (die
, cu
);
6458 if (fp
->name
== NULL
)
6461 fp
->type
= read_type_die (die
, cu
);
6463 new_field
->next
= fip
->typedef_field_list
;
6464 fip
->typedef_field_list
= new_field
;
6465 fip
->typedef_field_list_count
++;
6468 /* Create the vector of fields, and attach it to the type. */
6471 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6472 struct dwarf2_cu
*cu
)
6474 int nfields
= fip
->nfields
;
6476 /* Record the field count, allocate space for the array of fields,
6477 and create blank accessibility bitfields if necessary. */
6478 TYPE_NFIELDS (type
) = nfields
;
6479 TYPE_FIELDS (type
) = (struct field
*)
6480 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6481 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6483 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6485 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6487 TYPE_FIELD_PRIVATE_BITS (type
) =
6488 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6489 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6491 TYPE_FIELD_PROTECTED_BITS (type
) =
6492 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6493 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6495 TYPE_FIELD_IGNORE_BITS (type
) =
6496 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6497 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6500 /* If the type has baseclasses, allocate and clear a bit vector for
6501 TYPE_FIELD_VIRTUAL_BITS. */
6502 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6504 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6505 unsigned char *pointer
;
6507 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6508 pointer
= TYPE_ALLOC (type
, num_bytes
);
6509 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6510 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6511 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6514 /* Copy the saved-up fields into the field vector. Start from the head of
6515 the list, adding to the tail of the field array, so that they end up in
6516 the same order in the array in which they were added to the list. */
6517 while (nfields
-- > 0)
6519 struct nextfield
*fieldp
;
6523 fieldp
= fip
->fields
;
6524 fip
->fields
= fieldp
->next
;
6528 fieldp
= fip
->baseclasses
;
6529 fip
->baseclasses
= fieldp
->next
;
6532 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6533 switch (fieldp
->accessibility
)
6535 case DW_ACCESS_private
:
6536 if (cu
->language
!= language_ada
)
6537 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6540 case DW_ACCESS_protected
:
6541 if (cu
->language
!= language_ada
)
6542 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6545 case DW_ACCESS_public
:
6549 /* Unknown accessibility. Complain and treat it as public. */
6551 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6552 fieldp
->accessibility
);
6556 if (nfields
< fip
->nbaseclasses
)
6558 switch (fieldp
->virtuality
)
6560 case DW_VIRTUALITY_virtual
:
6561 case DW_VIRTUALITY_pure_virtual
:
6562 if (cu
->language
== language_ada
)
6563 error (_("unexpected virtuality in component of Ada type"));
6564 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6571 /* Add a member function to the proper fieldlist. */
6574 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6575 struct type
*type
, struct dwarf2_cu
*cu
)
6577 struct objfile
*objfile
= cu
->objfile
;
6578 struct attribute
*attr
;
6579 struct fnfieldlist
*flp
;
6581 struct fn_field
*fnp
;
6583 struct nextfnfield
*new_fnfield
;
6584 struct type
*this_type
;
6586 if (cu
->language
== language_ada
)
6587 error (_("unexpected member function in Ada type"));
6589 /* Get name of member function. */
6590 fieldname
= dwarf2_name (die
, cu
);
6591 if (fieldname
== NULL
)
6594 /* Look up member function name in fieldlist. */
6595 for (i
= 0; i
< fip
->nfnfields
; i
++)
6597 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6601 /* Create new list element if necessary. */
6602 if (i
< fip
->nfnfields
)
6603 flp
= &fip
->fnfieldlists
[i
];
6606 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6608 fip
->fnfieldlists
= (struct fnfieldlist
*)
6609 xrealloc (fip
->fnfieldlists
,
6610 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6611 * sizeof (struct fnfieldlist
));
6612 if (fip
->nfnfields
== 0)
6613 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6615 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6616 flp
->name
= fieldname
;
6619 i
= fip
->nfnfields
++;
6622 /* Create a new member function field and chain it to the field list
6624 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6625 make_cleanup (xfree
, new_fnfield
);
6626 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6627 new_fnfield
->next
= flp
->head
;
6628 flp
->head
= new_fnfield
;
6631 /* Fill in the member function field info. */
6632 fnp
= &new_fnfield
->fnfield
;
6634 /* Delay processing of the physname until later. */
6635 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6637 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6642 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6643 fnp
->physname
= physname
? physname
: "";
6646 fnp
->type
= alloc_type (objfile
);
6647 this_type
= read_type_die (die
, cu
);
6648 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6650 int nparams
= TYPE_NFIELDS (this_type
);
6652 /* TYPE is the domain of this method, and THIS_TYPE is the type
6653 of the method itself (TYPE_CODE_METHOD). */
6654 smash_to_method_type (fnp
->type
, type
,
6655 TYPE_TARGET_TYPE (this_type
),
6656 TYPE_FIELDS (this_type
),
6657 TYPE_NFIELDS (this_type
),
6658 TYPE_VARARGS (this_type
));
6660 /* Handle static member functions.
6661 Dwarf2 has no clean way to discern C++ static and non-static
6662 member functions. G++ helps GDB by marking the first
6663 parameter for non-static member functions (which is the this
6664 pointer) as artificial. We obtain this information from
6665 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6666 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6667 fnp
->voffset
= VOFFSET_STATIC
;
6670 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6671 dwarf2_full_name (fieldname
, die
, cu
));
6673 /* Get fcontext from DW_AT_containing_type if present. */
6674 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6675 fnp
->fcontext
= die_containing_type (die
, cu
);
6677 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
6678 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6680 /* Get accessibility. */
6681 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6684 switch (DW_UNSND (attr
))
6686 case DW_ACCESS_private
:
6687 fnp
->is_private
= 1;
6689 case DW_ACCESS_protected
:
6690 fnp
->is_protected
= 1;
6695 /* Check for artificial methods. */
6696 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6697 if (attr
&& DW_UNSND (attr
) != 0)
6698 fnp
->is_artificial
= 1;
6700 /* Get index in virtual function table if it is a virtual member
6701 function. For older versions of GCC, this is an offset in the
6702 appropriate virtual table, as specified by DW_AT_containing_type.
6703 For everyone else, it is an expression to be evaluated relative
6704 to the object address. */
6706 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6709 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6711 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6713 /* Old-style GCC. */
6714 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6716 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6717 || (DW_BLOCK (attr
)->size
> 1
6718 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6719 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6721 struct dwarf_block blk
;
6724 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6726 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6727 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6728 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6729 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6730 dwarf2_complex_location_expr_complaint ();
6732 fnp
->voffset
/= cu
->header
.addr_size
;
6736 dwarf2_complex_location_expr_complaint ();
6739 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6741 else if (attr_form_is_section_offset (attr
))
6743 dwarf2_complex_location_expr_complaint ();
6747 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6753 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6754 if (attr
&& DW_UNSND (attr
))
6756 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6757 complaint (&symfile_complaints
,
6758 _("Member function \"%s\" (offset %d) is virtual "
6759 "but the vtable offset is not specified"),
6760 fieldname
, die
->offset
);
6761 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6762 TYPE_CPLUS_DYNAMIC (type
) = 1;
6767 /* Create the vector of member function fields, and attach it to the type. */
6770 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6771 struct dwarf2_cu
*cu
)
6773 struct fnfieldlist
*flp
;
6774 int total_length
= 0;
6777 if (cu
->language
== language_ada
)
6778 error (_("unexpected member functions in Ada type"));
6780 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6781 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6782 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6784 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6786 struct nextfnfield
*nfp
= flp
->head
;
6787 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6790 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6791 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6792 fn_flp
->fn_fields
= (struct fn_field
*)
6793 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6794 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6795 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6797 total_length
+= flp
->length
;
6800 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6801 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6804 /* Returns non-zero if NAME is the name of a vtable member in CU's
6805 language, zero otherwise. */
6807 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6809 static const char vptr
[] = "_vptr";
6810 static const char vtable
[] = "vtable";
6812 /* Look for the C++ and Java forms of the vtable. */
6813 if ((cu
->language
== language_java
6814 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6815 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6816 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6822 /* GCC outputs unnamed structures that are really pointers to member
6823 functions, with the ABI-specified layout. If TYPE describes
6824 such a structure, smash it into a member function type.
6826 GCC shouldn't do this; it should just output pointer to member DIEs.
6827 This is GCC PR debug/28767. */
6830 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6832 struct type
*pfn_type
, *domain_type
, *new_type
;
6834 /* Check for a structure with no name and two children. */
6835 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6838 /* Check for __pfn and __delta members. */
6839 if (TYPE_FIELD_NAME (type
, 0) == NULL
6840 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6841 || TYPE_FIELD_NAME (type
, 1) == NULL
6842 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6845 /* Find the type of the method. */
6846 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6847 if (pfn_type
== NULL
6848 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6849 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6852 /* Look for the "this" argument. */
6853 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6854 if (TYPE_NFIELDS (pfn_type
) == 0
6855 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6856 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6859 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6860 new_type
= alloc_type (objfile
);
6861 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6862 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6863 TYPE_VARARGS (pfn_type
));
6864 smash_to_methodptr_type (type
, new_type
);
6867 /* Called when we find the DIE that starts a structure or union scope
6868 (definition) to create a type for the structure or union. Fill in
6869 the type's name and general properties; the members will not be
6870 processed until process_structure_type.
6872 NOTE: we need to call these functions regardless of whether or not the
6873 DIE has a DW_AT_name attribute, since it might be an anonymous
6874 structure or union. This gets the type entered into our set of
6877 However, if the structure is incomplete (an opaque struct/union)
6878 then suppress creating a symbol table entry for it since gdb only
6879 wants to find the one with the complete definition. Note that if
6880 it is complete, we just call new_symbol, which does it's own
6881 checking about whether the struct/union is anonymous or not (and
6882 suppresses creating a symbol table entry itself). */
6884 static struct type
*
6885 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6887 struct objfile
*objfile
= cu
->objfile
;
6889 struct attribute
*attr
;
6892 /* If the definition of this type lives in .debug_types, read that type.
6893 Don't follow DW_AT_specification though, that will take us back up
6894 the chain and we want to go down. */
6895 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6898 struct dwarf2_cu
*type_cu
= cu
;
6899 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6901 /* We could just recurse on read_structure_type, but we need to call
6902 get_die_type to ensure only one type for this DIE is created.
6903 This is important, for example, because for c++ classes we need
6904 TYPE_NAME set which is only done by new_symbol. Blech. */
6905 type
= read_type_die (type_die
, type_cu
);
6907 /* TYPE_CU may not be the same as CU.
6908 Ensure TYPE is recorded in CU's type_hash table. */
6909 return set_die_type (die
, type
, cu
);
6912 type
= alloc_type (objfile
);
6913 INIT_CPLUS_SPECIFIC (type
);
6915 name
= dwarf2_name (die
, cu
);
6918 if (cu
->language
== language_cplus
6919 || cu
->language
== language_java
)
6921 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6923 /* dwarf2_full_name might have already finished building the DIE's
6924 type. If so, there is no need to continue. */
6925 if (get_die_type (die
, cu
) != NULL
)
6926 return get_die_type (die
, cu
);
6928 TYPE_TAG_NAME (type
) = full_name
;
6929 if (die
->tag
== DW_TAG_structure_type
6930 || die
->tag
== DW_TAG_class_type
)
6931 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6935 /* The name is already allocated along with this objfile, so
6936 we don't need to duplicate it for the type. */
6937 TYPE_TAG_NAME (type
) = (char *) name
;
6938 if (die
->tag
== DW_TAG_class_type
)
6939 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6943 if (die
->tag
== DW_TAG_structure_type
)
6945 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6947 else if (die
->tag
== DW_TAG_union_type
)
6949 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6953 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6956 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6957 TYPE_DECLARED_CLASS (type
) = 1;
6959 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6962 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6966 TYPE_LENGTH (type
) = 0;
6969 TYPE_STUB_SUPPORTED (type
) = 1;
6970 if (die_is_declaration (die
, cu
))
6971 TYPE_STUB (type
) = 1;
6972 else if (attr
== NULL
&& die
->child
== NULL
6973 && producer_is_realview (cu
->producer
))
6974 /* RealView does not output the required DW_AT_declaration
6975 on incomplete types. */
6976 TYPE_STUB (type
) = 1;
6978 /* We need to add the type field to the die immediately so we don't
6979 infinitely recurse when dealing with pointers to the structure
6980 type within the structure itself. */
6981 set_die_type (die
, type
, cu
);
6983 /* set_die_type should be already done. */
6984 set_descriptive_type (type
, die
, cu
);
6989 /* Finish creating a structure or union type, including filling in
6990 its members and creating a symbol for it. */
6993 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6995 struct objfile
*objfile
= cu
->objfile
;
6996 struct die_info
*child_die
= die
->child
;
6999 type
= get_die_type (die
, cu
);
7001 type
= read_structure_type (die
, cu
);
7003 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
7005 struct field_info fi
;
7006 struct die_info
*child_die
;
7007 VEC (symbolp
) *template_args
= NULL
;
7008 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7010 memset (&fi
, 0, sizeof (struct field_info
));
7012 child_die
= die
->child
;
7014 while (child_die
&& child_die
->tag
)
7016 if (child_die
->tag
== DW_TAG_member
7017 || child_die
->tag
== DW_TAG_variable
)
7019 /* NOTE: carlton/2002-11-05: A C++ static data member
7020 should be a DW_TAG_member that is a declaration, but
7021 all versions of G++ as of this writing (so through at
7022 least 3.2.1) incorrectly generate DW_TAG_variable
7023 tags for them instead. */
7024 dwarf2_add_field (&fi
, child_die
, cu
);
7026 else if (child_die
->tag
== DW_TAG_subprogram
)
7028 /* C++ member function. */
7029 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
7031 else if (child_die
->tag
== DW_TAG_inheritance
)
7033 /* C++ base class field. */
7034 dwarf2_add_field (&fi
, child_die
, cu
);
7036 else if (child_die
->tag
== DW_TAG_typedef
)
7037 dwarf2_add_typedef (&fi
, child_die
, cu
);
7038 else if (child_die
->tag
== DW_TAG_template_type_param
7039 || child_die
->tag
== DW_TAG_template_value_param
)
7041 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7044 VEC_safe_push (symbolp
, template_args
, arg
);
7047 child_die
= sibling_die (child_die
);
7050 /* Attach template arguments to type. */
7051 if (! VEC_empty (symbolp
, template_args
))
7053 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7054 TYPE_N_TEMPLATE_ARGUMENTS (type
)
7055 = VEC_length (symbolp
, template_args
);
7056 TYPE_TEMPLATE_ARGUMENTS (type
)
7057 = obstack_alloc (&objfile
->objfile_obstack
,
7058 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7059 * sizeof (struct symbol
*)));
7060 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
7061 VEC_address (symbolp
, template_args
),
7062 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7063 * sizeof (struct symbol
*)));
7064 VEC_free (symbolp
, template_args
);
7067 /* Attach fields and member functions to the type. */
7069 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
7072 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
7074 /* Get the type which refers to the base class (possibly this
7075 class itself) which contains the vtable pointer for the current
7076 class from the DW_AT_containing_type attribute. This use of
7077 DW_AT_containing_type is a GNU extension. */
7079 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7081 struct type
*t
= die_containing_type (die
, cu
);
7083 TYPE_VPTR_BASETYPE (type
) = t
;
7088 /* Our own class provides vtbl ptr. */
7089 for (i
= TYPE_NFIELDS (t
) - 1;
7090 i
>= TYPE_N_BASECLASSES (t
);
7093 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
7095 if (is_vtable_name (fieldname
, cu
))
7097 TYPE_VPTR_FIELDNO (type
) = i
;
7102 /* Complain if virtual function table field not found. */
7103 if (i
< TYPE_N_BASECLASSES (t
))
7104 complaint (&symfile_complaints
,
7105 _("virtual function table pointer "
7106 "not found when defining class '%s'"),
7107 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
7112 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
7115 else if (cu
->producer
7116 && strncmp (cu
->producer
,
7117 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7119 /* The IBM XLC compiler does not provide direct indication
7120 of the containing type, but the vtable pointer is
7121 always named __vfp. */
7125 for (i
= TYPE_NFIELDS (type
) - 1;
7126 i
>= TYPE_N_BASECLASSES (type
);
7129 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
7131 TYPE_VPTR_FIELDNO (type
) = i
;
7132 TYPE_VPTR_BASETYPE (type
) = type
;
7139 /* Copy fi.typedef_field_list linked list elements content into the
7140 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7141 if (fi
.typedef_field_list
)
7143 int i
= fi
.typedef_field_list_count
;
7145 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7146 TYPE_TYPEDEF_FIELD_ARRAY (type
)
7147 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
7148 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
7150 /* Reverse the list order to keep the debug info elements order. */
7153 struct typedef_field
*dest
, *src
;
7155 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
7156 src
= &fi
.typedef_field_list
->field
;
7157 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
7162 do_cleanups (back_to
);
7165 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
7167 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7168 snapshots) has been known to create a die giving a declaration
7169 for a class that has, as a child, a die giving a definition for a
7170 nested class. So we have to process our children even if the
7171 current die is a declaration. Normally, of course, a declaration
7172 won't have any children at all. */
7174 while (child_die
!= NULL
&& child_die
->tag
)
7176 if (child_die
->tag
== DW_TAG_member
7177 || child_die
->tag
== DW_TAG_variable
7178 || child_die
->tag
== DW_TAG_inheritance
7179 || child_die
->tag
== DW_TAG_template_value_param
7180 || child_die
->tag
== DW_TAG_template_type_param
)
7185 process_die (child_die
, cu
);
7187 child_die
= sibling_die (child_die
);
7190 /* Do not consider external references. According to the DWARF standard,
7191 these DIEs are identified by the fact that they have no byte_size
7192 attribute, and a declaration attribute. */
7193 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7194 || !die_is_declaration (die
, cu
))
7195 new_symbol (die
, type
, cu
);
7198 /* Given a DW_AT_enumeration_type die, set its type. We do not
7199 complete the type's fields yet, or create any symbols. */
7201 static struct type
*
7202 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7204 struct objfile
*objfile
= cu
->objfile
;
7206 struct attribute
*attr
;
7209 /* If the definition of this type lives in .debug_types, read that type.
7210 Don't follow DW_AT_specification though, that will take us back up
7211 the chain and we want to go down. */
7212 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7215 struct dwarf2_cu
*type_cu
= cu
;
7216 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7218 type
= read_type_die (type_die
, type_cu
);
7220 /* TYPE_CU may not be the same as CU.
7221 Ensure TYPE is recorded in CU's type_hash table. */
7222 return set_die_type (die
, type
, cu
);
7225 type
= alloc_type (objfile
);
7227 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7228 name
= dwarf2_full_name (NULL
, die
, cu
);
7230 TYPE_TAG_NAME (type
) = (char *) name
;
7232 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7235 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7239 TYPE_LENGTH (type
) = 0;
7242 /* The enumeration DIE can be incomplete. In Ada, any type can be
7243 declared as private in the package spec, and then defined only
7244 inside the package body. Such types are known as Taft Amendment
7245 Types. When another package uses such a type, an incomplete DIE
7246 may be generated by the compiler. */
7247 if (die_is_declaration (die
, cu
))
7248 TYPE_STUB (type
) = 1;
7250 return set_die_type (die
, type
, cu
);
7253 /* Given a pointer to a die which begins an enumeration, process all
7254 the dies that define the members of the enumeration, and create the
7255 symbol for the enumeration type.
7257 NOTE: We reverse the order of the element list. */
7260 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7262 struct type
*this_type
;
7264 this_type
= get_die_type (die
, cu
);
7265 if (this_type
== NULL
)
7266 this_type
= read_enumeration_type (die
, cu
);
7268 if (die
->child
!= NULL
)
7270 struct die_info
*child_die
;
7272 struct field
*fields
= NULL
;
7274 int unsigned_enum
= 1;
7277 child_die
= die
->child
;
7278 while (child_die
&& child_die
->tag
)
7280 if (child_die
->tag
!= DW_TAG_enumerator
)
7282 process_die (child_die
, cu
);
7286 name
= dwarf2_name (child_die
, cu
);
7289 sym
= new_symbol (child_die
, this_type
, cu
);
7290 if (SYMBOL_VALUE (sym
) < 0)
7293 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7295 fields
= (struct field
*)
7297 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7298 * sizeof (struct field
));
7301 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7302 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7303 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7304 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7310 child_die
= sibling_die (child_die
);
7315 TYPE_NFIELDS (this_type
) = num_fields
;
7316 TYPE_FIELDS (this_type
) = (struct field
*)
7317 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7318 memcpy (TYPE_FIELDS (this_type
), fields
,
7319 sizeof (struct field
) * num_fields
);
7323 TYPE_UNSIGNED (this_type
) = 1;
7326 new_symbol (die
, this_type
, cu
);
7329 /* Extract all information from a DW_TAG_array_type DIE and put it in
7330 the DIE's type field. For now, this only handles one dimensional
7333 static struct type
*
7334 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7336 struct objfile
*objfile
= cu
->objfile
;
7337 struct die_info
*child_die
;
7339 struct type
*element_type
, *range_type
, *index_type
;
7340 struct type
**range_types
= NULL
;
7341 struct attribute
*attr
;
7343 struct cleanup
*back_to
;
7346 element_type
= die_type (die
, cu
);
7348 /* The die_type call above may have already set the type for this DIE. */
7349 type
= get_die_type (die
, cu
);
7353 /* Irix 6.2 native cc creates array types without children for
7354 arrays with unspecified length. */
7355 if (die
->child
== NULL
)
7357 index_type
= objfile_type (objfile
)->builtin_int
;
7358 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7359 type
= create_array_type (NULL
, element_type
, range_type
);
7360 return set_die_type (die
, type
, cu
);
7363 back_to
= make_cleanup (null_cleanup
, NULL
);
7364 child_die
= die
->child
;
7365 while (child_die
&& child_die
->tag
)
7367 if (child_die
->tag
== DW_TAG_subrange_type
)
7369 struct type
*child_type
= read_type_die (child_die
, cu
);
7371 if (child_type
!= NULL
)
7373 /* The range type was succesfully read. Save it for the
7374 array type creation. */
7375 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7377 range_types
= (struct type
**)
7378 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7379 * sizeof (struct type
*));
7381 make_cleanup (free_current_contents
, &range_types
);
7383 range_types
[ndim
++] = child_type
;
7386 child_die
= sibling_die (child_die
);
7389 /* Dwarf2 dimensions are output from left to right, create the
7390 necessary array types in backwards order. */
7392 type
= element_type
;
7394 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7399 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7404 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7407 /* Understand Dwarf2 support for vector types (like they occur on
7408 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7409 array type. This is not part of the Dwarf2/3 standard yet, but a
7410 custom vendor extension. The main difference between a regular
7411 array and the vector variant is that vectors are passed by value
7413 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7415 make_vector_type (type
);
7417 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
7418 implementation may choose to implement triple vectors using this
7420 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7423 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
7424 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7426 complaint (&symfile_complaints
,
7427 _("DW_AT_byte_size for array type smaller "
7428 "than the total size of elements"));
7431 name
= dwarf2_name (die
, cu
);
7433 TYPE_NAME (type
) = name
;
7435 /* Install the type in the die. */
7436 set_die_type (die
, type
, cu
);
7438 /* set_die_type should be already done. */
7439 set_descriptive_type (type
, die
, cu
);
7441 do_cleanups (back_to
);
7446 static enum dwarf_array_dim_ordering
7447 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7449 struct attribute
*attr
;
7451 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7453 if (attr
) return DW_SND (attr
);
7455 /* GNU F77 is a special case, as at 08/2004 array type info is the
7456 opposite order to the dwarf2 specification, but data is still
7457 laid out as per normal fortran.
7459 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7460 version checking. */
7462 if (cu
->language
== language_fortran
7463 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7465 return DW_ORD_row_major
;
7468 switch (cu
->language_defn
->la_array_ordering
)
7470 case array_column_major
:
7471 return DW_ORD_col_major
;
7472 case array_row_major
:
7474 return DW_ORD_row_major
;
7478 /* Extract all information from a DW_TAG_set_type DIE and put it in
7479 the DIE's type field. */
7481 static struct type
*
7482 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7484 struct type
*domain_type
, *set_type
;
7485 struct attribute
*attr
;
7487 domain_type
= die_type (die
, cu
);
7489 /* The die_type call above may have already set the type for this DIE. */
7490 set_type
= get_die_type (die
, cu
);
7494 set_type
= create_set_type (NULL
, domain_type
);
7496 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7498 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7500 return set_die_type (die
, set_type
, cu
);
7503 /* First cut: install each common block member as a global variable. */
7506 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7508 struct die_info
*child_die
;
7509 struct attribute
*attr
;
7511 CORE_ADDR base
= (CORE_ADDR
) 0;
7513 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7516 /* Support the .debug_loc offsets. */
7517 if (attr_form_is_block (attr
))
7519 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7521 else if (attr_form_is_section_offset (attr
))
7523 dwarf2_complex_location_expr_complaint ();
7527 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7528 "common block member");
7531 if (die
->child
!= NULL
)
7533 child_die
= die
->child
;
7534 while (child_die
&& child_die
->tag
)
7536 sym
= new_symbol (child_die
, NULL
, cu
);
7537 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7538 if (sym
!= NULL
&& attr
!= NULL
)
7540 CORE_ADDR byte_offset
= 0;
7542 if (attr_form_is_section_offset (attr
))
7543 dwarf2_complex_location_expr_complaint ();
7544 else if (attr_form_is_constant (attr
))
7545 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7546 else if (attr_form_is_block (attr
))
7547 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7549 dwarf2_complex_location_expr_complaint ();
7551 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7552 add_symbol_to_list (sym
, &global_symbols
);
7554 child_die
= sibling_die (child_die
);
7559 /* Create a type for a C++ namespace. */
7561 static struct type
*
7562 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7564 struct objfile
*objfile
= cu
->objfile
;
7565 const char *previous_prefix
, *name
;
7569 /* For extensions, reuse the type of the original namespace. */
7570 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7572 struct die_info
*ext_die
;
7573 struct dwarf2_cu
*ext_cu
= cu
;
7575 ext_die
= dwarf2_extension (die
, &ext_cu
);
7576 type
= read_type_die (ext_die
, ext_cu
);
7578 /* EXT_CU may not be the same as CU.
7579 Ensure TYPE is recorded in CU's type_hash table. */
7580 return set_die_type (die
, type
, cu
);
7583 name
= namespace_name (die
, &is_anonymous
, cu
);
7585 /* Now build the name of the current namespace. */
7587 previous_prefix
= determine_prefix (die
, cu
);
7588 if (previous_prefix
[0] != '\0')
7589 name
= typename_concat (&objfile
->objfile_obstack
,
7590 previous_prefix
, name
, 0, cu
);
7592 /* Create the type. */
7593 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7595 TYPE_NAME (type
) = (char *) name
;
7596 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7598 return set_die_type (die
, type
, cu
);
7601 /* Read a C++ namespace. */
7604 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7606 struct objfile
*objfile
= cu
->objfile
;
7609 /* Add a symbol associated to this if we haven't seen the namespace
7610 before. Also, add a using directive if it's an anonymous
7613 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7617 type
= read_type_die (die
, cu
);
7618 new_symbol (die
, type
, cu
);
7620 namespace_name (die
, &is_anonymous
, cu
);
7623 const char *previous_prefix
= determine_prefix (die
, cu
);
7625 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7626 NULL
, &objfile
->objfile_obstack
);
7630 if (die
->child
!= NULL
)
7632 struct die_info
*child_die
= die
->child
;
7634 while (child_die
&& child_die
->tag
)
7636 process_die (child_die
, cu
);
7637 child_die
= sibling_die (child_die
);
7642 /* Read a Fortran module as type. This DIE can be only a declaration used for
7643 imported module. Still we need that type as local Fortran "use ... only"
7644 declaration imports depend on the created type in determine_prefix. */
7646 static struct type
*
7647 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7649 struct objfile
*objfile
= cu
->objfile
;
7653 module_name
= dwarf2_name (die
, cu
);
7655 complaint (&symfile_complaints
,
7656 _("DW_TAG_module has no name, offset 0x%x"),
7658 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7660 /* determine_prefix uses TYPE_TAG_NAME. */
7661 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7663 return set_die_type (die
, type
, cu
);
7666 /* Read a Fortran module. */
7669 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7671 struct die_info
*child_die
= die
->child
;
7673 while (child_die
&& child_die
->tag
)
7675 process_die (child_die
, cu
);
7676 child_die
= sibling_die (child_die
);
7680 /* Return the name of the namespace represented by DIE. Set
7681 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7685 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7687 struct die_info
*current_die
;
7688 const char *name
= NULL
;
7690 /* Loop through the extensions until we find a name. */
7692 for (current_die
= die
;
7693 current_die
!= NULL
;
7694 current_die
= dwarf2_extension (die
, &cu
))
7696 name
= dwarf2_name (current_die
, cu
);
7701 /* Is it an anonymous namespace? */
7703 *is_anonymous
= (name
== NULL
);
7705 name
= "(anonymous namespace)";
7710 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7711 the user defined type vector. */
7713 static struct type
*
7714 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7716 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7717 struct comp_unit_head
*cu_header
= &cu
->header
;
7719 struct attribute
*attr_byte_size
;
7720 struct attribute
*attr_address_class
;
7721 int byte_size
, addr_class
;
7722 struct type
*target_type
;
7724 target_type
= die_type (die
, cu
);
7726 /* The die_type call above may have already set the type for this DIE. */
7727 type
= get_die_type (die
, cu
);
7731 type
= lookup_pointer_type (target_type
);
7733 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7735 byte_size
= DW_UNSND (attr_byte_size
);
7737 byte_size
= cu_header
->addr_size
;
7739 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7740 if (attr_address_class
)
7741 addr_class
= DW_UNSND (attr_address_class
);
7743 addr_class
= DW_ADDR_none
;
7745 /* If the pointer size or address class is different than the
7746 default, create a type variant marked as such and set the
7747 length accordingly. */
7748 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7750 if (gdbarch_address_class_type_flags_p (gdbarch
))
7754 type_flags
= gdbarch_address_class_type_flags
7755 (gdbarch
, byte_size
, addr_class
);
7756 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7758 type
= make_type_with_address_space (type
, type_flags
);
7760 else if (TYPE_LENGTH (type
) != byte_size
)
7762 complaint (&symfile_complaints
,
7763 _("invalid pointer size %d"), byte_size
);
7767 /* Should we also complain about unhandled address classes? */
7771 TYPE_LENGTH (type
) = byte_size
;
7772 return set_die_type (die
, type
, cu
);
7775 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7776 the user defined type vector. */
7778 static struct type
*
7779 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7782 struct type
*to_type
;
7783 struct type
*domain
;
7785 to_type
= die_type (die
, cu
);
7786 domain
= die_containing_type (die
, cu
);
7788 /* The calls above may have already set the type for this DIE. */
7789 type
= get_die_type (die
, cu
);
7793 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7794 type
= lookup_methodptr_type (to_type
);
7796 type
= lookup_memberptr_type (to_type
, domain
);
7798 return set_die_type (die
, type
, cu
);
7801 /* Extract all information from a DW_TAG_reference_type DIE and add to
7802 the user defined type vector. */
7804 static struct type
*
7805 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7807 struct comp_unit_head
*cu_header
= &cu
->header
;
7808 struct type
*type
, *target_type
;
7809 struct attribute
*attr
;
7811 target_type
= die_type (die
, cu
);
7813 /* The die_type call above may have already set the type for this DIE. */
7814 type
= get_die_type (die
, cu
);
7818 type
= lookup_reference_type (target_type
);
7819 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7822 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7826 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7828 return set_die_type (die
, type
, cu
);
7831 static struct type
*
7832 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7834 struct type
*base_type
, *cv_type
;
7836 base_type
= die_type (die
, cu
);
7838 /* The die_type call above may have already set the type for this DIE. */
7839 cv_type
= get_die_type (die
, cu
);
7843 /* In case the const qualifier is applied to an array type, the element type
7844 is so qualified, not the array type (section 6.7.3 of C99). */
7845 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
7847 struct type
*el_type
, *inner_array
;
7849 base_type
= copy_type (base_type
);
7850 inner_array
= base_type
;
7852 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
7854 TYPE_TARGET_TYPE (inner_array
) =
7855 copy_type (TYPE_TARGET_TYPE (inner_array
));
7856 inner_array
= TYPE_TARGET_TYPE (inner_array
);
7859 el_type
= TYPE_TARGET_TYPE (inner_array
);
7860 TYPE_TARGET_TYPE (inner_array
) =
7861 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
7863 return set_die_type (die
, base_type
, cu
);
7866 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7867 return set_die_type (die
, cv_type
, cu
);
7870 static struct type
*
7871 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7873 struct type
*base_type
, *cv_type
;
7875 base_type
= die_type (die
, cu
);
7877 /* The die_type call above may have already set the type for this DIE. */
7878 cv_type
= get_die_type (die
, cu
);
7882 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7883 return set_die_type (die
, cv_type
, cu
);
7886 /* Extract all information from a DW_TAG_string_type DIE and add to
7887 the user defined type vector. It isn't really a user defined type,
7888 but it behaves like one, with other DIE's using an AT_user_def_type
7889 attribute to reference it. */
7891 static struct type
*
7892 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7894 struct objfile
*objfile
= cu
->objfile
;
7895 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7896 struct type
*type
, *range_type
, *index_type
, *char_type
;
7897 struct attribute
*attr
;
7898 unsigned int length
;
7900 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7903 length
= DW_UNSND (attr
);
7907 /* Check for the DW_AT_byte_size attribute. */
7908 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7911 length
= DW_UNSND (attr
);
7919 index_type
= objfile_type (objfile
)->builtin_int
;
7920 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7921 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7922 type
= create_string_type (NULL
, char_type
, range_type
);
7924 return set_die_type (die
, type
, cu
);
7927 /* Handle DIES due to C code like:
7931 int (*funcp)(int a, long l);
7935 ('funcp' generates a DW_TAG_subroutine_type DIE). */
7937 static struct type
*
7938 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7940 struct type
*type
; /* Type that this function returns. */
7941 struct type
*ftype
; /* Function that returns above type. */
7942 struct attribute
*attr
;
7944 type
= die_type (die
, cu
);
7946 /* The die_type call above may have already set the type for this DIE. */
7947 ftype
= get_die_type (die
, cu
);
7951 ftype
= lookup_function_type (type
);
7953 /* All functions in C++, Pascal and Java have prototypes. */
7954 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7955 if ((attr
&& (DW_UNSND (attr
) != 0))
7956 || cu
->language
== language_cplus
7957 || cu
->language
== language_java
7958 || cu
->language
== language_pascal
)
7959 TYPE_PROTOTYPED (ftype
) = 1;
7960 else if (producer_is_realview (cu
->producer
))
7961 /* RealView does not emit DW_AT_prototyped. We can not
7962 distinguish prototyped and unprototyped functions; default to
7963 prototyped, since that is more common in modern code (and
7964 RealView warns about unprototyped functions). */
7965 TYPE_PROTOTYPED (ftype
) = 1;
7967 /* Store the calling convention in the type if it's available in
7968 the subroutine die. Otherwise set the calling convention to
7969 the default value DW_CC_normal. */
7970 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7972 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
7973 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
7974 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
7976 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
7978 /* We need to add the subroutine type to the die immediately so
7979 we don't infinitely recurse when dealing with parameters
7980 declared as the same subroutine type. */
7981 set_die_type (die
, ftype
, cu
);
7983 if (die
->child
!= NULL
)
7985 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7986 struct die_info
*child_die
;
7987 int nparams
, iparams
;
7989 /* Count the number of parameters.
7990 FIXME: GDB currently ignores vararg functions, but knows about
7991 vararg member functions. */
7993 child_die
= die
->child
;
7994 while (child_die
&& child_die
->tag
)
7996 if (child_die
->tag
== DW_TAG_formal_parameter
)
7998 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7999 TYPE_VARARGS (ftype
) = 1;
8000 child_die
= sibling_die (child_die
);
8003 /* Allocate storage for parameters and fill them in. */
8004 TYPE_NFIELDS (ftype
) = nparams
;
8005 TYPE_FIELDS (ftype
) = (struct field
*)
8006 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
8008 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
8009 even if we error out during the parameters reading below. */
8010 for (iparams
= 0; iparams
< nparams
; iparams
++)
8011 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
8014 child_die
= die
->child
;
8015 while (child_die
&& child_die
->tag
)
8017 if (child_die
->tag
== DW_TAG_formal_parameter
)
8019 struct type
*arg_type
;
8021 /* DWARF version 2 has no clean way to discern C++
8022 static and non-static member functions. G++ helps
8023 GDB by marking the first parameter for non-static
8024 member functions (which is the this pointer) as
8025 artificial. We pass this information to
8026 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
8028 DWARF version 3 added DW_AT_object_pointer, which GCC
8029 4.5 does not yet generate. */
8030 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
8032 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
8035 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
8037 /* GCC/43521: In java, the formal parameter
8038 "this" is sometimes not marked with DW_AT_artificial. */
8039 if (cu
->language
== language_java
)
8041 const char *name
= dwarf2_name (child_die
, cu
);
8043 if (name
&& !strcmp (name
, "this"))
8044 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
8047 arg_type
= die_type (child_die
, cu
);
8049 /* RealView does not mark THIS as const, which the testsuite
8050 expects. GCC marks THIS as const in method definitions,
8051 but not in the class specifications (GCC PR 43053). */
8052 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
8053 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
8056 struct dwarf2_cu
*arg_cu
= cu
;
8057 const char *name
= dwarf2_name (child_die
, cu
);
8059 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
8062 /* If the compiler emits this, use it. */
8063 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
8066 else if (name
&& strcmp (name
, "this") == 0)
8067 /* Function definitions will have the argument names. */
8069 else if (name
== NULL
&& iparams
== 0)
8070 /* Declarations may not have the names, so like
8071 elsewhere in GDB, assume an artificial first
8072 argument is "this". */
8076 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
8080 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
8083 child_die
= sibling_die (child_die
);
8090 static struct type
*
8091 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
8093 struct objfile
*objfile
= cu
->objfile
;
8094 const char *name
= NULL
;
8095 struct type
*this_type
;
8097 name
= dwarf2_full_name (NULL
, die
, cu
);
8098 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
8099 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
8100 TYPE_NAME (this_type
) = (char *) name
;
8101 set_die_type (die
, this_type
, cu
);
8102 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
8106 /* Find a representation of a given base type and install
8107 it in the TYPE field of the die. */
8109 static struct type
*
8110 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8112 struct objfile
*objfile
= cu
->objfile
;
8114 struct attribute
*attr
;
8115 int encoding
= 0, size
= 0;
8117 enum type_code code
= TYPE_CODE_INT
;
8119 struct type
*target_type
= NULL
;
8121 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
8124 encoding
= DW_UNSND (attr
);
8126 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8129 size
= DW_UNSND (attr
);
8131 name
= dwarf2_name (die
, cu
);
8134 complaint (&symfile_complaints
,
8135 _("DW_AT_name missing from DW_TAG_base_type"));
8140 case DW_ATE_address
:
8141 /* Turn DW_ATE_address into a void * pointer. */
8142 code
= TYPE_CODE_PTR
;
8143 type_flags
|= TYPE_FLAG_UNSIGNED
;
8144 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
8146 case DW_ATE_boolean
:
8147 code
= TYPE_CODE_BOOL
;
8148 type_flags
|= TYPE_FLAG_UNSIGNED
;
8150 case DW_ATE_complex_float
:
8151 code
= TYPE_CODE_COMPLEX
;
8152 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
8154 case DW_ATE_decimal_float
:
8155 code
= TYPE_CODE_DECFLOAT
;
8158 code
= TYPE_CODE_FLT
;
8162 case DW_ATE_unsigned
:
8163 type_flags
|= TYPE_FLAG_UNSIGNED
;
8165 case DW_ATE_signed_char
:
8166 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8167 || cu
->language
== language_pascal
)
8168 code
= TYPE_CODE_CHAR
;
8170 case DW_ATE_unsigned_char
:
8171 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8172 || cu
->language
== language_pascal
)
8173 code
= TYPE_CODE_CHAR
;
8174 type_flags
|= TYPE_FLAG_UNSIGNED
;
8177 /* We just treat this as an integer and then recognize the
8178 type by name elsewhere. */
8182 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
8183 dwarf_type_encoding_name (encoding
));
8187 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
8188 TYPE_NAME (type
) = name
;
8189 TYPE_TARGET_TYPE (type
) = target_type
;
8191 if (name
&& strcmp (name
, "char") == 0)
8192 TYPE_NOSIGN (type
) = 1;
8194 return set_die_type (die
, type
, cu
);
8197 /* Read the given DW_AT_subrange DIE. */
8199 static struct type
*
8200 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8202 struct type
*base_type
;
8203 struct type
*range_type
;
8204 struct attribute
*attr
;
8208 LONGEST negative_mask
;
8210 base_type
= die_type (die
, cu
);
8211 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8212 check_typedef (base_type
);
8214 /* The die_type call above may have already set the type for this DIE. */
8215 range_type
= get_die_type (die
, cu
);
8219 if (cu
->language
== language_fortran
)
8221 /* FORTRAN implies a lower bound of 1, if not given. */
8225 /* FIXME: For variable sized arrays either of these could be
8226 a variable rather than a constant value. We'll allow it,
8227 but we don't know how to handle it. */
8228 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
8230 low
= dwarf2_get_attr_constant_value (attr
, 0);
8232 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8235 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
8237 /* GCC encodes arrays with unspecified or dynamic length
8238 with a DW_FORM_block1 attribute or a reference attribute.
8239 FIXME: GDB does not yet know how to handle dynamic
8240 arrays properly, treat them as arrays with unspecified
8243 FIXME: jimb/2003-09-22: GDB does not really know
8244 how to handle arrays of unspecified length
8245 either; we just represent them as zero-length
8246 arrays. Choose an appropriate upper bound given
8247 the lower bound we've computed above. */
8251 high
= dwarf2_get_attr_constant_value (attr
, 1);
8255 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8258 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8259 high
= low
+ count
- 1;
8263 /* Unspecified array length. */
8268 /* Dwarf-2 specifications explicitly allows to create subrange types
8269 without specifying a base type.
8270 In that case, the base type must be set to the type of
8271 the lower bound, upper bound or count, in that order, if any of these
8272 three attributes references an object that has a type.
8273 If no base type is found, the Dwarf-2 specifications say that
8274 a signed integer type of size equal to the size of an address should
8276 For the following C code: `extern char gdb_int [];'
8277 GCC produces an empty range DIE.
8278 FIXME: muller/2010-05-28: Possible references to object for low bound,
8279 high bound or count are not yet handled by this code. */
8280 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8282 struct objfile
*objfile
= cu
->objfile
;
8283 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8284 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8285 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8287 /* Test "int", "long int", and "long long int" objfile types,
8288 and select the first one having a size above or equal to the
8289 architecture address size. */
8290 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8291 base_type
= int_type
;
8294 int_type
= objfile_type (objfile
)->builtin_long
;
8295 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8296 base_type
= int_type
;
8299 int_type
= objfile_type (objfile
)->builtin_long_long
;
8300 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8301 base_type
= int_type
;
8307 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8308 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8309 low
|= negative_mask
;
8310 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8311 high
|= negative_mask
;
8313 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8315 /* Mark arrays with dynamic length at least as an array of unspecified
8316 length. GDB could check the boundary but before it gets implemented at
8317 least allow accessing the array elements. */
8318 if (attr
&& attr
->form
== DW_FORM_block1
)
8319 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8321 /* Ada expects an empty array on no boundary attributes. */
8322 if (attr
== NULL
&& cu
->language
!= language_ada
)
8323 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8325 name
= dwarf2_name (die
, cu
);
8327 TYPE_NAME (range_type
) = name
;
8329 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8331 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8333 set_die_type (die
, range_type
, cu
);
8335 /* set_die_type should be already done. */
8336 set_descriptive_type (range_type
, die
, cu
);
8341 static struct type
*
8342 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8346 /* For now, we only support the C meaning of an unspecified type: void. */
8348 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8349 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8351 return set_die_type (die
, type
, cu
);
8354 /* Trivial hash function for die_info: the hash value of a DIE
8355 is its offset in .debug_info for this objfile. */
8358 die_hash (const void *item
)
8360 const struct die_info
*die
= item
;
8365 /* Trivial comparison function for die_info structures: two DIEs
8366 are equal if they have the same offset. */
8369 die_eq (const void *item_lhs
, const void *item_rhs
)
8371 const struct die_info
*die_lhs
= item_lhs
;
8372 const struct die_info
*die_rhs
= item_rhs
;
8374 return die_lhs
->offset
== die_rhs
->offset
;
8377 /* Read a whole compilation unit into a linked list of dies. */
8379 static struct die_info
*
8380 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8382 struct die_reader_specs reader_specs
;
8383 int read_abbrevs
= 0;
8384 struct cleanup
*back_to
= NULL
;
8385 struct die_info
*die
;
8387 if (cu
->dwarf2_abbrevs
== NULL
)
8389 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8390 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8394 gdb_assert (cu
->die_hash
== NULL
);
8396 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8400 &cu
->comp_unit_obstack
,
8401 hashtab_obstack_allocate
,
8402 dummy_obstack_deallocate
);
8404 init_cu_die_reader (&reader_specs
, cu
);
8406 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8409 do_cleanups (back_to
);
8414 /* Main entry point for reading a DIE and all children.
8415 Read the DIE and dump it if requested. */
8417 static struct die_info
*
8418 read_die_and_children (const struct die_reader_specs
*reader
,
8420 gdb_byte
**new_info_ptr
,
8421 struct die_info
*parent
)
8423 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8424 new_info_ptr
, parent
);
8426 if (dwarf2_die_debug
)
8428 fprintf_unfiltered (gdb_stdlog
,
8429 "\nRead die from %s of %s:\n",
8430 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8432 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8434 : "unknown section",
8435 reader
->abfd
->filename
);
8436 dump_die (result
, dwarf2_die_debug
);
8442 /* Read a single die and all its descendents. Set the die's sibling
8443 field to NULL; set other fields in the die correctly, and set all
8444 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8445 location of the info_ptr after reading all of those dies. PARENT
8446 is the parent of the die in question. */
8448 static struct die_info
*
8449 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8451 gdb_byte
**new_info_ptr
,
8452 struct die_info
*parent
)
8454 struct die_info
*die
;
8458 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8461 *new_info_ptr
= cur_ptr
;
8464 store_in_ref_table (die
, reader
->cu
);
8467 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8471 *new_info_ptr
= cur_ptr
;
8474 die
->sibling
= NULL
;
8475 die
->parent
= parent
;
8479 /* Read a die, all of its descendents, and all of its siblings; set
8480 all of the fields of all of the dies correctly. Arguments are as
8481 in read_die_and_children. */
8483 static struct die_info
*
8484 read_die_and_siblings (const struct die_reader_specs
*reader
,
8486 gdb_byte
**new_info_ptr
,
8487 struct die_info
*parent
)
8489 struct die_info
*first_die
, *last_sibling
;
8493 first_die
= last_sibling
= NULL
;
8497 struct die_info
*die
8498 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8502 *new_info_ptr
= cur_ptr
;
8509 last_sibling
->sibling
= die
;
8515 /* Read the die from the .debug_info section buffer. Set DIEP to
8516 point to a newly allocated die with its information, except for its
8517 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8518 whether the die has children or not. */
8521 read_full_die (const struct die_reader_specs
*reader
,
8522 struct die_info
**diep
, gdb_byte
*info_ptr
,
8525 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8526 struct abbrev_info
*abbrev
;
8527 struct die_info
*die
;
8528 struct dwarf2_cu
*cu
= reader
->cu
;
8529 bfd
*abfd
= reader
->abfd
;
8531 offset
= info_ptr
- reader
->buffer
;
8532 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8533 info_ptr
+= bytes_read
;
8541 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8543 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8545 bfd_get_filename (abfd
));
8547 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8548 die
->offset
= offset
;
8549 die
->tag
= abbrev
->tag
;
8550 die
->abbrev
= abbrev_number
;
8552 die
->num_attrs
= abbrev
->num_attrs
;
8554 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8555 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8556 abfd
, info_ptr
, cu
);
8559 *has_children
= abbrev
->has_children
;
8563 /* In DWARF version 2, the description of the debugging information is
8564 stored in a separate .debug_abbrev section. Before we read any
8565 dies from a section we read in all abbreviations and install them
8566 in a hash table. This function also sets flags in CU describing
8567 the data found in the abbrev table. */
8570 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8572 struct comp_unit_head
*cu_header
= &cu
->header
;
8573 gdb_byte
*abbrev_ptr
;
8574 struct abbrev_info
*cur_abbrev
;
8575 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8576 unsigned int abbrev_form
, hash_number
;
8577 struct attr_abbrev
*cur_attrs
;
8578 unsigned int allocated_attrs
;
8580 /* Initialize dwarf2 abbrevs. */
8581 obstack_init (&cu
->abbrev_obstack
);
8582 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8584 * sizeof (struct abbrev_info
*)));
8585 memset (cu
->dwarf2_abbrevs
, 0,
8586 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8588 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8589 &dwarf2_per_objfile
->abbrev
);
8590 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8591 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8592 abbrev_ptr
+= bytes_read
;
8594 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8595 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8597 /* Loop until we reach an abbrev number of 0. */
8598 while (abbrev_number
)
8600 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8602 /* read in abbrev header */
8603 cur_abbrev
->number
= abbrev_number
;
8604 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8605 abbrev_ptr
+= bytes_read
;
8606 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8609 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8610 cu
->has_namespace_info
= 1;
8612 /* now read in declarations */
8613 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8614 abbrev_ptr
+= bytes_read
;
8615 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8616 abbrev_ptr
+= bytes_read
;
8619 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8621 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8623 = xrealloc (cur_attrs
, (allocated_attrs
8624 * sizeof (struct attr_abbrev
)));
8627 /* Record whether this compilation unit might have
8628 inter-compilation-unit references. If we don't know what form
8629 this attribute will have, then it might potentially be a
8630 DW_FORM_ref_addr, so we conservatively expect inter-CU
8633 if (abbrev_form
== DW_FORM_ref_addr
8634 || abbrev_form
== DW_FORM_indirect
)
8635 cu
->has_form_ref_addr
= 1;
8637 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8638 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8639 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8640 abbrev_ptr
+= bytes_read
;
8641 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8642 abbrev_ptr
+= bytes_read
;
8645 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8646 (cur_abbrev
->num_attrs
8647 * sizeof (struct attr_abbrev
)));
8648 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8649 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8651 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8652 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8653 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8655 /* Get next abbreviation.
8656 Under Irix6 the abbreviations for a compilation unit are not
8657 always properly terminated with an abbrev number of 0.
8658 Exit loop if we encounter an abbreviation which we have
8659 already read (which means we are about to read the abbreviations
8660 for the next compile unit) or if the end of the abbreviation
8661 table is reached. */
8662 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8663 >= dwarf2_per_objfile
->abbrev
.size
)
8665 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8666 abbrev_ptr
+= bytes_read
;
8667 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8674 /* Release the memory used by the abbrev table for a compilation unit. */
8677 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8679 struct dwarf2_cu
*cu
= ptr_to_cu
;
8681 obstack_free (&cu
->abbrev_obstack
, NULL
);
8682 cu
->dwarf2_abbrevs
= NULL
;
8685 /* Lookup an abbrev_info structure in the abbrev hash table. */
8687 static struct abbrev_info
*
8688 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8690 unsigned int hash_number
;
8691 struct abbrev_info
*abbrev
;
8693 hash_number
= number
% ABBREV_HASH_SIZE
;
8694 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8698 if (abbrev
->number
== number
)
8701 abbrev
= abbrev
->next
;
8706 /* Returns nonzero if TAG represents a type that we might generate a partial
8710 is_type_tag_for_partial (int tag
)
8715 /* Some types that would be reasonable to generate partial symbols for,
8716 that we don't at present. */
8717 case DW_TAG_array_type
:
8718 case DW_TAG_file_type
:
8719 case DW_TAG_ptr_to_member_type
:
8720 case DW_TAG_set_type
:
8721 case DW_TAG_string_type
:
8722 case DW_TAG_subroutine_type
:
8724 case DW_TAG_base_type
:
8725 case DW_TAG_class_type
:
8726 case DW_TAG_interface_type
:
8727 case DW_TAG_enumeration_type
:
8728 case DW_TAG_structure_type
:
8729 case DW_TAG_subrange_type
:
8730 case DW_TAG_typedef
:
8731 case DW_TAG_union_type
:
8738 /* Load all DIEs that are interesting for partial symbols into memory. */
8740 static struct partial_die_info
*
8741 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8742 int building_psymtab
, struct dwarf2_cu
*cu
)
8744 struct partial_die_info
*part_die
;
8745 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8746 struct abbrev_info
*abbrev
;
8747 unsigned int bytes_read
;
8748 unsigned int load_all
= 0;
8750 int nesting_level
= 1;
8755 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8759 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8763 &cu
->comp_unit_obstack
,
8764 hashtab_obstack_allocate
,
8765 dummy_obstack_deallocate
);
8767 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8768 sizeof (struct partial_die_info
));
8772 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8774 /* A NULL abbrev means the end of a series of children. */
8777 if (--nesting_level
== 0)
8779 /* PART_DIE was probably the last thing allocated on the
8780 comp_unit_obstack, so we could call obstack_free
8781 here. We don't do that because the waste is small,
8782 and will be cleaned up when we're done with this
8783 compilation unit. This way, we're also more robust
8784 against other users of the comp_unit_obstack. */
8787 info_ptr
+= bytes_read
;
8788 last_die
= parent_die
;
8789 parent_die
= parent_die
->die_parent
;
8793 /* Check for template arguments. We never save these; if
8794 they're seen, we just mark the parent, and go on our way. */
8795 if (parent_die
!= NULL
8796 && cu
->language
== language_cplus
8797 && (abbrev
->tag
== DW_TAG_template_type_param
8798 || abbrev
->tag
== DW_TAG_template_value_param
))
8800 parent_die
->has_template_arguments
= 1;
8804 /* We don't need a partial DIE for the template argument. */
8805 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8811 /* We only recurse into subprograms looking for template arguments.
8812 Skip their other children. */
8814 && cu
->language
== language_cplus
8815 && parent_die
!= NULL
8816 && parent_die
->tag
== DW_TAG_subprogram
)
8818 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8822 /* Check whether this DIE is interesting enough to save. Normally
8823 we would not be interested in members here, but there may be
8824 later variables referencing them via DW_AT_specification (for
8827 && !is_type_tag_for_partial (abbrev
->tag
)
8828 && abbrev
->tag
!= DW_TAG_constant
8829 && abbrev
->tag
!= DW_TAG_enumerator
8830 && abbrev
->tag
!= DW_TAG_subprogram
8831 && abbrev
->tag
!= DW_TAG_lexical_block
8832 && abbrev
->tag
!= DW_TAG_variable
8833 && abbrev
->tag
!= DW_TAG_namespace
8834 && abbrev
->tag
!= DW_TAG_module
8835 && abbrev
->tag
!= DW_TAG_member
)
8837 /* Otherwise we skip to the next sibling, if any. */
8838 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8842 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8843 buffer
, info_ptr
, cu
);
8845 /* This two-pass algorithm for processing partial symbols has a
8846 high cost in cache pressure. Thus, handle some simple cases
8847 here which cover the majority of C partial symbols. DIEs
8848 which neither have specification tags in them, nor could have
8849 specification tags elsewhere pointing at them, can simply be
8850 processed and discarded.
8852 This segment is also optional; scan_partial_symbols and
8853 add_partial_symbol will handle these DIEs if we chain
8854 them in normally. When compilers which do not emit large
8855 quantities of duplicate debug information are more common,
8856 this code can probably be removed. */
8858 /* Any complete simple types at the top level (pretty much all
8859 of them, for a language without namespaces), can be processed
8861 if (parent_die
== NULL
8862 && part_die
->has_specification
== 0
8863 && part_die
->is_declaration
== 0
8864 && (part_die
->tag
== DW_TAG_typedef
8865 || part_die
->tag
== DW_TAG_base_type
8866 || part_die
->tag
== DW_TAG_subrange_type
))
8868 if (building_psymtab
&& part_die
->name
!= NULL
)
8869 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8870 VAR_DOMAIN
, LOC_TYPEDEF
,
8871 &cu
->objfile
->static_psymbols
,
8872 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8873 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8877 /* If we're at the second level, and we're an enumerator, and
8878 our parent has no specification (meaning possibly lives in a
8879 namespace elsewhere), then we can add the partial symbol now
8880 instead of queueing it. */
8881 if (part_die
->tag
== DW_TAG_enumerator
8882 && parent_die
!= NULL
8883 && parent_die
->die_parent
== NULL
8884 && parent_die
->tag
== DW_TAG_enumeration_type
8885 && parent_die
->has_specification
== 0)
8887 if (part_die
->name
== NULL
)
8888 complaint (&symfile_complaints
,
8889 _("malformed enumerator DIE ignored"));
8890 else if (building_psymtab
)
8891 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8892 VAR_DOMAIN
, LOC_CONST
,
8893 (cu
->language
== language_cplus
8894 || cu
->language
== language_java
)
8895 ? &cu
->objfile
->global_psymbols
8896 : &cu
->objfile
->static_psymbols
,
8897 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8899 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8903 /* We'll save this DIE so link it in. */
8904 part_die
->die_parent
= parent_die
;
8905 part_die
->die_sibling
= NULL
;
8906 part_die
->die_child
= NULL
;
8908 if (last_die
&& last_die
== parent_die
)
8909 last_die
->die_child
= part_die
;
8911 last_die
->die_sibling
= part_die
;
8913 last_die
= part_die
;
8915 if (first_die
== NULL
)
8916 first_die
= part_die
;
8918 /* Maybe add the DIE to the hash table. Not all DIEs that we
8919 find interesting need to be in the hash table, because we
8920 also have the parent/sibling/child chains; only those that we
8921 might refer to by offset later during partial symbol reading.
8923 For now this means things that might have be the target of a
8924 DW_AT_specification, DW_AT_abstract_origin, or
8925 DW_AT_extension. DW_AT_extension will refer only to
8926 namespaces; DW_AT_abstract_origin refers to functions (and
8927 many things under the function DIE, but we do not recurse
8928 into function DIEs during partial symbol reading) and
8929 possibly variables as well; DW_AT_specification refers to
8930 declarations. Declarations ought to have the DW_AT_declaration
8931 flag. It happens that GCC forgets to put it in sometimes, but
8932 only for functions, not for types.
8934 Adding more things than necessary to the hash table is harmless
8935 except for the performance cost. Adding too few will result in
8936 wasted time in find_partial_die, when we reread the compilation
8937 unit with load_all_dies set. */
8940 || abbrev
->tag
== DW_TAG_constant
8941 || abbrev
->tag
== DW_TAG_subprogram
8942 || abbrev
->tag
== DW_TAG_variable
8943 || abbrev
->tag
== DW_TAG_namespace
8944 || part_die
->is_declaration
)
8948 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8949 part_die
->offset
, INSERT
);
8953 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8954 sizeof (struct partial_die_info
));
8956 /* For some DIEs we want to follow their children (if any). For C
8957 we have no reason to follow the children of structures; for other
8958 languages we have to, so that we can get at method physnames
8959 to infer fully qualified class names, for DW_AT_specification,
8960 and for C++ template arguments. For C++, we also look one level
8961 inside functions to find template arguments (if the name of the
8962 function does not already contain the template arguments).
8964 For Ada, we need to scan the children of subprograms and lexical
8965 blocks as well because Ada allows the definition of nested
8966 entities that could be interesting for the debugger, such as
8967 nested subprograms for instance. */
8968 if (last_die
->has_children
8970 || last_die
->tag
== DW_TAG_namespace
8971 || last_die
->tag
== DW_TAG_module
8972 || last_die
->tag
== DW_TAG_enumeration_type
8973 || (cu
->language
== language_cplus
8974 && last_die
->tag
== DW_TAG_subprogram
8975 && (last_die
->name
== NULL
8976 || strchr (last_die
->name
, '<') == NULL
))
8977 || (cu
->language
!= language_c
8978 && (last_die
->tag
== DW_TAG_class_type
8979 || last_die
->tag
== DW_TAG_interface_type
8980 || last_die
->tag
== DW_TAG_structure_type
8981 || last_die
->tag
== DW_TAG_union_type
))
8982 || (cu
->language
== language_ada
8983 && (last_die
->tag
== DW_TAG_subprogram
8984 || last_die
->tag
== DW_TAG_lexical_block
))))
8987 parent_die
= last_die
;
8991 /* Otherwise we skip to the next sibling, if any. */
8992 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8994 /* Back to the top, do it again. */
8998 /* Read a minimal amount of information into the minimal die structure. */
9001 read_partial_die (struct partial_die_info
*part_die
,
9002 struct abbrev_info
*abbrev
,
9003 unsigned int abbrev_len
, bfd
*abfd
,
9004 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
9005 struct dwarf2_cu
*cu
)
9008 struct attribute attr
;
9009 int has_low_pc_attr
= 0;
9010 int has_high_pc_attr
= 0;
9012 memset (part_die
, 0, sizeof (struct partial_die_info
));
9014 part_die
->offset
= info_ptr
- buffer
;
9016 info_ptr
+= abbrev_len
;
9021 part_die
->tag
= abbrev
->tag
;
9022 part_die
->has_children
= abbrev
->has_children
;
9024 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9026 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
9028 /* Store the data if it is of an attribute we want to keep in a
9029 partial symbol table. */
9033 switch (part_die
->tag
)
9035 case DW_TAG_compile_unit
:
9036 case DW_TAG_type_unit
:
9037 /* Compilation units have a DW_AT_name that is a filename, not
9038 a source language identifier. */
9039 case DW_TAG_enumeration_type
:
9040 case DW_TAG_enumerator
:
9041 /* These tags always have simple identifiers already; no need
9042 to canonicalize them. */
9043 part_die
->name
= DW_STRING (&attr
);
9047 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
9048 &cu
->objfile
->objfile_obstack
);
9052 case DW_AT_linkage_name
:
9053 case DW_AT_MIPS_linkage_name
:
9054 /* Note that both forms of linkage name might appear. We
9055 assume they will be the same, and we only store the last
9057 if (cu
->language
== language_ada
)
9058 part_die
->name
= DW_STRING (&attr
);
9059 part_die
->linkage_name
= DW_STRING (&attr
);
9062 has_low_pc_attr
= 1;
9063 part_die
->lowpc
= DW_ADDR (&attr
);
9066 has_high_pc_attr
= 1;
9067 part_die
->highpc
= DW_ADDR (&attr
);
9069 case DW_AT_location
:
9070 /* Support the .debug_loc offsets. */
9071 if (attr_form_is_block (&attr
))
9073 part_die
->locdesc
= DW_BLOCK (&attr
);
9075 else if (attr_form_is_section_offset (&attr
))
9077 dwarf2_complex_location_expr_complaint ();
9081 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9082 "partial symbol information");
9085 case DW_AT_external
:
9086 part_die
->is_external
= DW_UNSND (&attr
);
9088 case DW_AT_declaration
:
9089 part_die
->is_declaration
= DW_UNSND (&attr
);
9092 part_die
->has_type
= 1;
9094 case DW_AT_abstract_origin
:
9095 case DW_AT_specification
:
9096 case DW_AT_extension
:
9097 part_die
->has_specification
= 1;
9098 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
9101 /* Ignore absolute siblings, they might point outside of
9102 the current compile unit. */
9103 if (attr
.form
== DW_FORM_ref_addr
)
9104 complaint (&symfile_complaints
,
9105 _("ignoring absolute DW_AT_sibling"));
9107 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
9109 case DW_AT_byte_size
:
9110 part_die
->has_byte_size
= 1;
9112 case DW_AT_calling_convention
:
9113 /* DWARF doesn't provide a way to identify a program's source-level
9114 entry point. DW_AT_calling_convention attributes are only meant
9115 to describe functions' calling conventions.
9117 However, because it's a necessary piece of information in
9118 Fortran, and because DW_CC_program is the only piece of debugging
9119 information whose definition refers to a 'main program' at all,
9120 several compilers have begun marking Fortran main programs with
9121 DW_CC_program --- even when those functions use the standard
9122 calling conventions.
9124 So until DWARF specifies a way to provide this information and
9125 compilers pick up the new representation, we'll support this
9127 if (DW_UNSND (&attr
) == DW_CC_program
9128 && cu
->language
== language_fortran
)
9130 set_main_name (part_die
->name
);
9132 /* As this DIE has a static linkage the name would be difficult
9133 to look up later. */
9134 language_of_main
= language_fortran
;
9142 /* When using the GNU linker, .gnu.linkonce. sections are used to
9143 eliminate duplicate copies of functions and vtables and such.
9144 The linker will arbitrarily choose one and discard the others.
9145 The AT_*_pc values for such functions refer to local labels in
9146 these sections. If the section from that file was discarded, the
9147 labels are not in the output, so the relocs get a value of 0.
9148 If this is a discarded function, mark the pc bounds as invalid,
9149 so that GDB will ignore it. */
9150 if (has_low_pc_attr
&& has_high_pc_attr
9151 && part_die
->lowpc
< part_die
->highpc
9152 && (part_die
->lowpc
!= 0
9153 || dwarf2_per_objfile
->has_section_at_zero
))
9154 part_die
->has_pc_info
= 1;
9159 /* Find a cached partial DIE at OFFSET in CU. */
9161 static struct partial_die_info
*
9162 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
9164 struct partial_die_info
*lookup_die
= NULL
;
9165 struct partial_die_info part_die
;
9167 part_die
.offset
= offset
;
9168 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
9173 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9174 except in the case of .debug_types DIEs which do not reference
9175 outside their CU (they do however referencing other types via
9178 static struct partial_die_info
*
9179 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
9181 struct dwarf2_per_cu_data
*per_cu
= NULL
;
9182 struct partial_die_info
*pd
= NULL
;
9184 if (cu
->per_cu
->from_debug_types
)
9186 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9192 if (offset_in_cu_p (&cu
->header
, offset
))
9194 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9199 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
9201 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
9202 load_partial_comp_unit (per_cu
, cu
->objfile
);
9204 per_cu
->cu
->last_used
= 0;
9205 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9207 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
9209 struct cleanup
*back_to
;
9210 struct partial_die_info comp_unit_die
;
9211 struct abbrev_info
*abbrev
;
9212 unsigned int bytes_read
;
9215 per_cu
->load_all_dies
= 1;
9217 /* Re-read the DIEs. */
9218 back_to
= make_cleanup (null_cleanup
, 0);
9219 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
9221 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
9222 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
9224 info_ptr
= (dwarf2_per_objfile
->info
.buffer
9225 + per_cu
->cu
->header
.offset
9226 + per_cu
->cu
->header
.first_die_offset
);
9227 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
9228 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
9229 per_cu
->cu
->objfile
->obfd
,
9230 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9232 if (comp_unit_die
.has_children
)
9233 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
9234 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9236 do_cleanups (back_to
);
9238 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9244 internal_error (__FILE__
, __LINE__
,
9245 _("could not find partial DIE 0x%x "
9246 "in cache [from module %s]\n"),
9247 offset
, bfd_get_filename (cu
->objfile
->obfd
));
9251 /* See if we can figure out if the class lives in a namespace. We do
9252 this by looking for a member function; its demangled name will
9253 contain namespace info, if there is any. */
9256 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
9257 struct dwarf2_cu
*cu
)
9259 /* NOTE: carlton/2003-10-07: Getting the info this way changes
9260 what template types look like, because the demangler
9261 frequently doesn't give the same name as the debug info. We
9262 could fix this by only using the demangled name to get the
9263 prefix (but see comment in read_structure_type). */
9265 struct partial_die_info
*real_pdi
;
9266 struct partial_die_info
*child_pdi
;
9268 /* If this DIE (this DIE's specification, if any) has a parent, then
9269 we should not do this. We'll prepend the parent's fully qualified
9270 name when we create the partial symbol. */
9272 real_pdi
= struct_pdi
;
9273 while (real_pdi
->has_specification
)
9274 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
9276 if (real_pdi
->die_parent
!= NULL
)
9279 for (child_pdi
= struct_pdi
->die_child
;
9281 child_pdi
= child_pdi
->die_sibling
)
9283 if (child_pdi
->tag
== DW_TAG_subprogram
9284 && child_pdi
->linkage_name
!= NULL
)
9286 char *actual_class_name
9287 = language_class_name_from_physname (cu
->language_defn
,
9288 child_pdi
->linkage_name
);
9289 if (actual_class_name
!= NULL
)
9292 = obsavestring (actual_class_name
,
9293 strlen (actual_class_name
),
9294 &cu
->objfile
->objfile_obstack
);
9295 xfree (actual_class_name
);
9302 /* Adjust PART_DIE before generating a symbol for it. This function
9303 may set the is_external flag or change the DIE's name. */
9306 fixup_partial_die (struct partial_die_info
*part_die
,
9307 struct dwarf2_cu
*cu
)
9309 /* Once we've fixed up a die, there's no point in doing so again.
9310 This also avoids a memory leak if we were to call
9311 guess_partial_die_structure_name multiple times. */
9312 if (part_die
->fixup_called
)
9315 /* If we found a reference attribute and the DIE has no name, try
9316 to find a name in the referred to DIE. */
9318 if (part_die
->name
== NULL
&& part_die
->has_specification
)
9320 struct partial_die_info
*spec_die
;
9322 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
9324 fixup_partial_die (spec_die
, cu
);
9328 part_die
->name
= spec_die
->name
;
9330 /* Copy DW_AT_external attribute if it is set. */
9331 if (spec_die
->is_external
)
9332 part_die
->is_external
= spec_die
->is_external
;
9336 /* Set default names for some unnamed DIEs. */
9338 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9339 part_die
->name
= "(anonymous namespace)";
9341 /* If there is no parent die to provide a namespace, and there are
9342 children, see if we can determine the namespace from their linkage
9344 NOTE: We need to do this even if cu->has_namespace_info != 0.
9345 gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
9346 if (cu
->language
== language_cplus
9347 && dwarf2_per_objfile
->types
.asection
!= NULL
9348 && part_die
->die_parent
== NULL
9349 && part_die
->has_children
9350 && (part_die
->tag
== DW_TAG_class_type
9351 || part_die
->tag
== DW_TAG_structure_type
9352 || part_die
->tag
== DW_TAG_union_type
))
9353 guess_partial_die_structure_name (part_die
, cu
);
9355 part_die
->fixup_called
= 1;
9358 /* Read an attribute value described by an attribute form. */
9361 read_attribute_value (struct attribute
*attr
, unsigned form
,
9362 bfd
*abfd
, gdb_byte
*info_ptr
,
9363 struct dwarf2_cu
*cu
)
9365 struct comp_unit_head
*cu_header
= &cu
->header
;
9366 unsigned int bytes_read
;
9367 struct dwarf_block
*blk
;
9372 case DW_FORM_ref_addr
:
9373 if (cu
->header
.version
== 2)
9374 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9376 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
,
9377 &cu
->header
, &bytes_read
);
9378 info_ptr
+= bytes_read
;
9381 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9382 info_ptr
+= bytes_read
;
9384 case DW_FORM_block2
:
9385 blk
= dwarf_alloc_block (cu
);
9386 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9388 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9389 info_ptr
+= blk
->size
;
9390 DW_BLOCK (attr
) = blk
;
9392 case DW_FORM_block4
:
9393 blk
= dwarf_alloc_block (cu
);
9394 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9396 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9397 info_ptr
+= blk
->size
;
9398 DW_BLOCK (attr
) = blk
;
9401 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9405 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9409 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9412 case DW_FORM_sec_offset
:
9413 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9414 info_ptr
+= bytes_read
;
9416 case DW_FORM_string
:
9417 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9418 DW_STRING_IS_CANONICAL (attr
) = 0;
9419 info_ptr
+= bytes_read
;
9422 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9424 DW_STRING_IS_CANONICAL (attr
) = 0;
9425 info_ptr
+= bytes_read
;
9427 case DW_FORM_exprloc
:
9429 blk
= dwarf_alloc_block (cu
);
9430 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9431 info_ptr
+= bytes_read
;
9432 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9433 info_ptr
+= blk
->size
;
9434 DW_BLOCK (attr
) = blk
;
9436 case DW_FORM_block1
:
9437 blk
= dwarf_alloc_block (cu
);
9438 blk
->size
= read_1_byte (abfd
, info_ptr
);
9440 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9441 info_ptr
+= blk
->size
;
9442 DW_BLOCK (attr
) = blk
;
9445 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9449 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9452 case DW_FORM_flag_present
:
9453 DW_UNSND (attr
) = 1;
9456 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9457 info_ptr
+= bytes_read
;
9460 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9461 info_ptr
+= bytes_read
;
9464 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9468 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9472 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9476 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9480 /* Convert the signature to something we can record in DW_UNSND
9482 NOTE: This is NULL if the type wasn't found. */
9483 DW_SIGNATURED_TYPE (attr
) =
9484 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9487 case DW_FORM_ref_udata
:
9488 DW_ADDR (attr
) = (cu
->header
.offset
9489 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9490 info_ptr
+= bytes_read
;
9492 case DW_FORM_indirect
:
9493 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9494 info_ptr
+= bytes_read
;
9495 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9498 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9499 dwarf_form_name (form
),
9500 bfd_get_filename (abfd
));
9503 /* We have seen instances where the compiler tried to emit a byte
9504 size attribute of -1 which ended up being encoded as an unsigned
9505 0xffffffff. Although 0xffffffff is technically a valid size value,
9506 an object of this size seems pretty unlikely so we can relatively
9507 safely treat these cases as if the size attribute was invalid and
9508 treat them as zero by default. */
9509 if (attr
->name
== DW_AT_byte_size
9510 && form
== DW_FORM_data4
9511 && DW_UNSND (attr
) >= 0xffffffff)
9514 (&symfile_complaints
,
9515 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9516 hex_string (DW_UNSND (attr
)));
9517 DW_UNSND (attr
) = 0;
9523 /* Read an attribute described by an abbreviated attribute. */
9526 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9527 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9529 attr
->name
= abbrev
->name
;
9530 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9533 /* Read dwarf information from a buffer. */
9536 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9538 return bfd_get_8 (abfd
, buf
);
9542 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9544 return bfd_get_signed_8 (abfd
, buf
);
9548 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9550 return bfd_get_16 (abfd
, buf
);
9554 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9556 return bfd_get_signed_16 (abfd
, buf
);
9560 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9562 return bfd_get_32 (abfd
, buf
);
9566 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9568 return bfd_get_signed_32 (abfd
, buf
);
9572 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9574 return bfd_get_64 (abfd
, buf
);
9578 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9579 unsigned int *bytes_read
)
9581 struct comp_unit_head
*cu_header
= &cu
->header
;
9582 CORE_ADDR retval
= 0;
9584 if (cu_header
->signed_addr_p
)
9586 switch (cu_header
->addr_size
)
9589 retval
= bfd_get_signed_16 (abfd
, buf
);
9592 retval
= bfd_get_signed_32 (abfd
, buf
);
9595 retval
= bfd_get_signed_64 (abfd
, buf
);
9598 internal_error (__FILE__
, __LINE__
,
9599 _("read_address: bad switch, signed [in module %s]"),
9600 bfd_get_filename (abfd
));
9605 switch (cu_header
->addr_size
)
9608 retval
= bfd_get_16 (abfd
, buf
);
9611 retval
= bfd_get_32 (abfd
, buf
);
9614 retval
= bfd_get_64 (abfd
, buf
);
9617 internal_error (__FILE__
, __LINE__
,
9618 _("read_address: bad switch, "
9619 "unsigned [in module %s]"),
9620 bfd_get_filename (abfd
));
9624 *bytes_read
= cu_header
->addr_size
;
9628 /* Read the initial length from a section. The (draft) DWARF 3
9629 specification allows the initial length to take up either 4 bytes
9630 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9631 bytes describe the length and all offsets will be 8 bytes in length
9634 An older, non-standard 64-bit format is also handled by this
9635 function. The older format in question stores the initial length
9636 as an 8-byte quantity without an escape value. Lengths greater
9637 than 2^32 aren't very common which means that the initial 4 bytes
9638 is almost always zero. Since a length value of zero doesn't make
9639 sense for the 32-bit format, this initial zero can be considered to
9640 be an escape value which indicates the presence of the older 64-bit
9641 format. As written, the code can't detect (old format) lengths
9642 greater than 4GB. If it becomes necessary to handle lengths
9643 somewhat larger than 4GB, we could allow other small values (such
9644 as the non-sensical values of 1, 2, and 3) to also be used as
9645 escape values indicating the presence of the old format.
9647 The value returned via bytes_read should be used to increment the
9648 relevant pointer after calling read_initial_length().
9650 [ Note: read_initial_length() and read_offset() are based on the
9651 document entitled "DWARF Debugging Information Format", revision
9652 3, draft 8, dated November 19, 2001. This document was obtained
9655 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9657 This document is only a draft and is subject to change. (So beware.)
9659 Details regarding the older, non-standard 64-bit format were
9660 determined empirically by examining 64-bit ELF files produced by
9661 the SGI toolchain on an IRIX 6.5 machine.
9663 - Kevin, July 16, 2002
9667 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9669 LONGEST length
= bfd_get_32 (abfd
, buf
);
9671 if (length
== 0xffffffff)
9673 length
= bfd_get_64 (abfd
, buf
+ 4);
9676 else if (length
== 0)
9678 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9679 length
= bfd_get_64 (abfd
, buf
);
9690 /* Cover function for read_initial_length.
9691 Returns the length of the object at BUF, and stores the size of the
9692 initial length in *BYTES_READ and stores the size that offsets will be in
9694 If the initial length size is not equivalent to that specified in
9695 CU_HEADER then issue a complaint.
9696 This is useful when reading non-comp-unit headers. */
9699 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9700 const struct comp_unit_head
*cu_header
,
9701 unsigned int *bytes_read
,
9702 unsigned int *offset_size
)
9704 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9706 gdb_assert (cu_header
->initial_length_size
== 4
9707 || cu_header
->initial_length_size
== 8
9708 || cu_header
->initial_length_size
== 12);
9710 if (cu_header
->initial_length_size
!= *bytes_read
)
9711 complaint (&symfile_complaints
,
9712 _("intermixed 32-bit and 64-bit DWARF sections"));
9714 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9718 /* Read an offset from the data stream. The size of the offset is
9719 given by cu_header->offset_size. */
9722 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9723 unsigned int *bytes_read
)
9725 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9727 *bytes_read
= cu_header
->offset_size
;
9731 /* Read an offset from the data stream. */
9734 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9738 switch (offset_size
)
9741 retval
= bfd_get_32 (abfd
, buf
);
9744 retval
= bfd_get_64 (abfd
, buf
);
9747 internal_error (__FILE__
, __LINE__
,
9748 _("read_offset_1: bad switch [in module %s]"),
9749 bfd_get_filename (abfd
));
9756 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9758 /* If the size of a host char is 8 bits, we can return a pointer
9759 to the buffer, otherwise we have to copy the data to a buffer
9760 allocated on the temporary obstack. */
9761 gdb_assert (HOST_CHAR_BIT
== 8);
9766 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9768 /* If the size of a host char is 8 bits, we can return a pointer
9769 to the string, otherwise we have to copy the string to a buffer
9770 allocated on the temporary obstack. */
9771 gdb_assert (HOST_CHAR_BIT
== 8);
9774 *bytes_read_ptr
= 1;
9777 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9778 return (char *) buf
;
9782 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9783 const struct comp_unit_head
*cu_header
,
9784 unsigned int *bytes_read_ptr
)
9786 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9788 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9789 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9791 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9792 bfd_get_filename (abfd
));
9795 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9797 error (_("DW_FORM_strp pointing outside of "
9798 ".debug_str section [in module %s]"),
9799 bfd_get_filename (abfd
));
9802 gdb_assert (HOST_CHAR_BIT
== 8);
9803 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9805 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9808 static unsigned long
9809 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9811 unsigned long result
;
9812 unsigned int num_read
;
9822 byte
= bfd_get_8 (abfd
, buf
);
9825 result
|= ((unsigned long)(byte
& 127) << shift
);
9826 if ((byte
& 128) == 0)
9832 *bytes_read_ptr
= num_read
;
9837 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9840 int i
, shift
, num_read
;
9849 byte
= bfd_get_8 (abfd
, buf
);
9852 result
|= ((long)(byte
& 127) << shift
);
9854 if ((byte
& 128) == 0)
9859 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9860 result
|= -(((long)1) << shift
);
9861 *bytes_read_ptr
= num_read
;
9865 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9868 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9874 byte
= bfd_get_8 (abfd
, buf
);
9876 if ((byte
& 128) == 0)
9882 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9889 cu
->language
= language_c
;
9891 case DW_LANG_C_plus_plus
:
9892 cu
->language
= language_cplus
;
9895 cu
->language
= language_d
;
9897 case DW_LANG_Fortran77
:
9898 case DW_LANG_Fortran90
:
9899 case DW_LANG_Fortran95
:
9900 cu
->language
= language_fortran
;
9902 case DW_LANG_Mips_Assembler
:
9903 cu
->language
= language_asm
;
9906 cu
->language
= language_java
;
9910 cu
->language
= language_ada
;
9912 case DW_LANG_Modula2
:
9913 cu
->language
= language_m2
;
9915 case DW_LANG_Pascal83
:
9916 cu
->language
= language_pascal
;
9919 cu
->language
= language_objc
;
9921 case DW_LANG_Cobol74
:
9922 case DW_LANG_Cobol85
:
9924 cu
->language
= language_minimal
;
9927 cu
->language_defn
= language_def (cu
->language
);
9930 /* Return the named attribute or NULL if not there. */
9932 static struct attribute
*
9933 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9936 struct attribute
*spec
= NULL
;
9938 for (i
= 0; i
< die
->num_attrs
; ++i
)
9940 if (die
->attrs
[i
].name
== name
)
9941 return &die
->attrs
[i
];
9942 if (die
->attrs
[i
].name
== DW_AT_specification
9943 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9944 spec
= &die
->attrs
[i
];
9949 die
= follow_die_ref (die
, spec
, &cu
);
9950 return dwarf2_attr (die
, name
, cu
);
9956 /* Return the named attribute or NULL if not there,
9957 but do not follow DW_AT_specification, etc.
9958 This is for use in contexts where we're reading .debug_types dies.
9959 Following DW_AT_specification, DW_AT_abstract_origin will take us
9960 back up the chain, and we want to go down. */
9962 static struct attribute
*
9963 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9964 struct dwarf2_cu
*cu
)
9968 for (i
= 0; i
< die
->num_attrs
; ++i
)
9969 if (die
->attrs
[i
].name
== name
)
9970 return &die
->attrs
[i
];
9975 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9976 and holds a non-zero value. This function should only be used for
9977 DW_FORM_flag or DW_FORM_flag_present attributes. */
9980 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9982 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9984 return (attr
&& DW_UNSND (attr
));
9988 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9990 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9991 which value is non-zero. However, we have to be careful with
9992 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9993 (via dwarf2_flag_true_p) follows this attribute. So we may
9994 end up accidently finding a declaration attribute that belongs
9995 to a different DIE referenced by the specification attribute,
9996 even though the given DIE does not have a declaration attribute. */
9997 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9998 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
10001 /* Return the die giving the specification for DIE, if there is
10002 one. *SPEC_CU is the CU containing DIE on input, and the CU
10003 containing the return value on output. If there is no
10004 specification, but there is an abstract origin, that is
10007 static struct die_info
*
10008 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
10010 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
10013 if (spec_attr
== NULL
)
10014 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
10016 if (spec_attr
== NULL
)
10019 return follow_die_ref (die
, spec_attr
, spec_cu
);
10022 /* Free the line_header structure *LH, and any arrays and strings it
10024 NOTE: This is also used as a "cleanup" function. */
10027 free_line_header (struct line_header
*lh
)
10029 if (lh
->standard_opcode_lengths
)
10030 xfree (lh
->standard_opcode_lengths
);
10032 /* Remember that all the lh->file_names[i].name pointers are
10033 pointers into debug_line_buffer, and don't need to be freed. */
10034 if (lh
->file_names
)
10035 xfree (lh
->file_names
);
10037 /* Similarly for the include directory names. */
10038 if (lh
->include_dirs
)
10039 xfree (lh
->include_dirs
);
10044 /* Add an entry to LH's include directory table. */
10047 add_include_dir (struct line_header
*lh
, char *include_dir
)
10049 /* Grow the array if necessary. */
10050 if (lh
->include_dirs_size
== 0)
10052 lh
->include_dirs_size
= 1; /* for testing */
10053 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
10054 * sizeof (*lh
->include_dirs
));
10056 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
10058 lh
->include_dirs_size
*= 2;
10059 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
10060 (lh
->include_dirs_size
10061 * sizeof (*lh
->include_dirs
)));
10064 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
10067 /* Add an entry to LH's file name table. */
10070 add_file_name (struct line_header
*lh
,
10072 unsigned int dir_index
,
10073 unsigned int mod_time
,
10074 unsigned int length
)
10076 struct file_entry
*fe
;
10078 /* Grow the array if necessary. */
10079 if (lh
->file_names_size
== 0)
10081 lh
->file_names_size
= 1; /* for testing */
10082 lh
->file_names
= xmalloc (lh
->file_names_size
10083 * sizeof (*lh
->file_names
));
10085 else if (lh
->num_file_names
>= lh
->file_names_size
)
10087 lh
->file_names_size
*= 2;
10088 lh
->file_names
= xrealloc (lh
->file_names
,
10089 (lh
->file_names_size
10090 * sizeof (*lh
->file_names
)));
10093 fe
= &lh
->file_names
[lh
->num_file_names
++];
10095 fe
->dir_index
= dir_index
;
10096 fe
->mod_time
= mod_time
;
10097 fe
->length
= length
;
10098 fe
->included_p
= 0;
10102 /* Read the statement program header starting at OFFSET in
10103 .debug_line, according to the endianness of ABFD. Return a pointer
10104 to a struct line_header, allocated using xmalloc.
10106 NOTE: the strings in the include directory and file name tables of
10107 the returned object point into debug_line_buffer, and must not be
10110 static struct line_header
*
10111 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
10112 struct dwarf2_cu
*cu
)
10114 struct cleanup
*back_to
;
10115 struct line_header
*lh
;
10116 gdb_byte
*line_ptr
;
10117 unsigned int bytes_read
, offset_size
;
10119 char *cur_dir
, *cur_file
;
10121 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
10122 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
10124 complaint (&symfile_complaints
, _("missing .debug_line section"));
10128 /* Make sure that at least there's room for the total_length field.
10129 That could be 12 bytes long, but we're just going to fudge that. */
10130 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
10132 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10136 lh
= xmalloc (sizeof (*lh
));
10137 memset (lh
, 0, sizeof (*lh
));
10138 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
10141 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
10143 /* Read in the header. */
10145 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
10146 &bytes_read
, &offset_size
);
10147 line_ptr
+= bytes_read
;
10148 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
10149 + dwarf2_per_objfile
->line
.size
))
10151 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10154 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
10155 lh
->version
= read_2_bytes (abfd
, line_ptr
);
10157 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
10158 line_ptr
+= offset_size
;
10159 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
10161 if (lh
->version
>= 4)
10163 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
10167 lh
->maximum_ops_per_instruction
= 1;
10169 if (lh
->maximum_ops_per_instruction
== 0)
10171 lh
->maximum_ops_per_instruction
= 1;
10172 complaint (&symfile_complaints
,
10173 _("invalid maximum_ops_per_instruction "
10174 "in `.debug_line' section"));
10177 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
10179 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
10181 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
10183 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
10185 lh
->standard_opcode_lengths
10186 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
10188 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
10189 for (i
= 1; i
< lh
->opcode_base
; ++i
)
10191 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
10195 /* Read directory table. */
10196 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10198 line_ptr
+= bytes_read
;
10199 add_include_dir (lh
, cur_dir
);
10201 line_ptr
+= bytes_read
;
10203 /* Read file name table. */
10204 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10206 unsigned int dir_index
, mod_time
, length
;
10208 line_ptr
+= bytes_read
;
10209 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10210 line_ptr
+= bytes_read
;
10211 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10212 line_ptr
+= bytes_read
;
10213 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10214 line_ptr
+= bytes_read
;
10216 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10218 line_ptr
+= bytes_read
;
10219 lh
->statement_program_start
= line_ptr
;
10221 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
10222 + dwarf2_per_objfile
->line
.size
))
10223 complaint (&symfile_complaints
,
10224 _("line number info header doesn't "
10225 "fit in `.debug_line' section"));
10227 discard_cleanups (back_to
);
10231 /* This function exists to work around a bug in certain compilers
10232 (particularly GCC 2.95), in which the first line number marker of a
10233 function does not show up until after the prologue, right before
10234 the second line number marker. This function shifts ADDRESS down
10235 to the beginning of the function if necessary, and is called on
10236 addresses passed to record_line. */
10239 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
10241 struct function_range
*fn
;
10243 /* Find the function_range containing address. */
10247 if (!cu
->cached_fn
)
10248 cu
->cached_fn
= cu
->first_fn
;
10250 fn
= cu
->cached_fn
;
10252 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10258 while (fn
&& fn
!= cu
->cached_fn
)
10259 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
10269 if (address
!= fn
->lowpc
)
10270 complaint (&symfile_complaints
,
10271 _("misplaced first line number at 0x%lx for '%s'"),
10272 (unsigned long) address
, fn
->name
);
10277 /* Subroutine of dwarf_decode_lines to simplify it.
10278 Return the file name of the psymtab for included file FILE_INDEX
10279 in line header LH of PST.
10280 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10281 If space for the result is malloc'd, it will be freed by a cleanup.
10282 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
10285 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
10286 const struct partial_symtab
*pst
,
10287 const char *comp_dir
)
10289 const struct file_entry fe
= lh
->file_names
[file_index
];
10290 char *include_name
= fe
.name
;
10291 char *include_name_to_compare
= include_name
;
10292 char *dir_name
= NULL
;
10293 const char *pst_filename
;
10294 char *copied_name
= NULL
;
10298 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
10300 if (!IS_ABSOLUTE_PATH (include_name
)
10301 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
10303 /* Avoid creating a duplicate psymtab for PST.
10304 We do this by comparing INCLUDE_NAME and PST_FILENAME.
10305 Before we do the comparison, however, we need to account
10306 for DIR_NAME and COMP_DIR.
10307 First prepend dir_name (if non-NULL). If we still don't
10308 have an absolute path prepend comp_dir (if non-NULL).
10309 However, the directory we record in the include-file's
10310 psymtab does not contain COMP_DIR (to match the
10311 corresponding symtab(s)).
10316 bash$ gcc -g ./hello.c
10317 include_name = "hello.c"
10319 DW_AT_comp_dir = comp_dir = "/tmp"
10320 DW_AT_name = "./hello.c" */
10322 if (dir_name
!= NULL
)
10324 include_name
= concat (dir_name
, SLASH_STRING
,
10325 include_name
, (char *)NULL
);
10326 include_name_to_compare
= include_name
;
10327 make_cleanup (xfree
, include_name
);
10329 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
10331 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
10332 include_name
, (char *)NULL
);
10336 pst_filename
= pst
->filename
;
10337 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
10339 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
10340 pst_filename
, (char *)NULL
);
10341 pst_filename
= copied_name
;
10344 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
10346 if (include_name_to_compare
!= include_name
)
10347 xfree (include_name_to_compare
);
10348 if (copied_name
!= NULL
)
10349 xfree (copied_name
);
10353 return include_name
;
10356 /* Decode the Line Number Program (LNP) for the given line_header
10357 structure and CU. The actual information extracted and the type
10358 of structures created from the LNP depends on the value of PST.
10360 1. If PST is NULL, then this procedure uses the data from the program
10361 to create all necessary symbol tables, and their linetables.
10363 2. If PST is not NULL, this procedure reads the program to determine
10364 the list of files included by the unit represented by PST, and
10365 builds all the associated partial symbol tables.
10367 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10368 It is used for relative paths in the line table.
10369 NOTE: When processing partial symtabs (pst != NULL),
10370 comp_dir == pst->dirname.
10372 NOTE: It is important that psymtabs have the same file name (via strcmp)
10373 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10374 symtab we don't use it in the name of the psymtabs we create.
10375 E.g. expand_line_sal requires this when finding psymtabs to expand.
10376 A good testcase for this is mb-inline.exp. */
10379 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
, bfd
*abfd
,
10380 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10382 gdb_byte
*line_ptr
, *extended_end
;
10383 gdb_byte
*line_end
;
10384 unsigned int bytes_read
, extended_len
;
10385 unsigned char op_code
, extended_op
, adj_opcode
;
10386 CORE_ADDR baseaddr
;
10387 struct objfile
*objfile
= cu
->objfile
;
10388 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10389 const int decode_for_pst_p
= (pst
!= NULL
);
10390 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10392 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10394 line_ptr
= lh
->statement_program_start
;
10395 line_end
= lh
->statement_program_end
;
10397 /* Read the statement sequences until there's nothing left. */
10398 while (line_ptr
< line_end
)
10400 /* state machine registers */
10401 CORE_ADDR address
= 0;
10402 unsigned int file
= 1;
10403 unsigned int line
= 1;
10404 unsigned int column
= 0;
10405 int is_stmt
= lh
->default_is_stmt
;
10406 int basic_block
= 0;
10407 int end_sequence
= 0;
10409 unsigned char op_index
= 0;
10411 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10413 /* Start a subfile for the current file of the state machine. */
10414 /* lh->include_dirs and lh->file_names are 0-based, but the
10415 directory and file name numbers in the statement program
10417 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10421 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10423 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10426 /* Decode the table. */
10427 while (!end_sequence
)
10429 op_code
= read_1_byte (abfd
, line_ptr
);
10431 if (line_ptr
> line_end
)
10433 dwarf2_debug_line_missing_end_sequence_complaint ();
10437 if (op_code
>= lh
->opcode_base
)
10439 /* Special operand. */
10440 adj_opcode
= op_code
- lh
->opcode_base
;
10441 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10442 / lh
->maximum_ops_per_instruction
)
10443 * lh
->minimum_instruction_length
);
10444 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10445 % lh
->maximum_ops_per_instruction
);
10446 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10447 if (lh
->num_file_names
< file
|| file
== 0)
10448 dwarf2_debug_line_missing_file_complaint ();
10449 /* For now we ignore lines not starting on an
10450 instruction boundary. */
10451 else if (op_index
== 0)
10453 lh
->file_names
[file
- 1].included_p
= 1;
10454 if (!decode_for_pst_p
&& is_stmt
)
10456 if (last_subfile
!= current_subfile
)
10458 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10460 record_line (last_subfile
, 0, addr
);
10461 last_subfile
= current_subfile
;
10463 /* Append row to matrix using current values. */
10464 addr
= check_cu_functions (address
, cu
);
10465 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10466 record_line (current_subfile
, line
, addr
);
10471 else switch (op_code
)
10473 case DW_LNS_extended_op
:
10474 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
10476 line_ptr
+= bytes_read
;
10477 extended_end
= line_ptr
+ extended_len
;
10478 extended_op
= read_1_byte (abfd
, line_ptr
);
10480 switch (extended_op
)
10482 case DW_LNE_end_sequence
:
10485 case DW_LNE_set_address
:
10486 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10488 line_ptr
+= bytes_read
;
10489 address
+= baseaddr
;
10491 case DW_LNE_define_file
:
10494 unsigned int dir_index
, mod_time
, length
;
10496 cur_file
= read_direct_string (abfd
, line_ptr
,
10498 line_ptr
+= bytes_read
;
10500 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10501 line_ptr
+= bytes_read
;
10503 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10504 line_ptr
+= bytes_read
;
10506 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10507 line_ptr
+= bytes_read
;
10508 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10511 case DW_LNE_set_discriminator
:
10512 /* The discriminator is not interesting to the debugger;
10514 line_ptr
= extended_end
;
10517 complaint (&symfile_complaints
,
10518 _("mangled .debug_line section"));
10521 /* Make sure that we parsed the extended op correctly. If e.g.
10522 we expected a different address size than the producer used,
10523 we may have read the wrong number of bytes. */
10524 if (line_ptr
!= extended_end
)
10526 complaint (&symfile_complaints
,
10527 _("mangled .debug_line section"));
10532 if (lh
->num_file_names
< file
|| file
== 0)
10533 dwarf2_debug_line_missing_file_complaint ();
10536 lh
->file_names
[file
- 1].included_p
= 1;
10537 if (!decode_for_pst_p
&& is_stmt
)
10539 if (last_subfile
!= current_subfile
)
10541 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10543 record_line (last_subfile
, 0, addr
);
10544 last_subfile
= current_subfile
;
10546 addr
= check_cu_functions (address
, cu
);
10547 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10548 record_line (current_subfile
, line
, addr
);
10553 case DW_LNS_advance_pc
:
10556 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10558 address
+= (((op_index
+ adjust
)
10559 / lh
->maximum_ops_per_instruction
)
10560 * lh
->minimum_instruction_length
);
10561 op_index
= ((op_index
+ adjust
)
10562 % lh
->maximum_ops_per_instruction
);
10563 line_ptr
+= bytes_read
;
10566 case DW_LNS_advance_line
:
10567 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10568 line_ptr
+= bytes_read
;
10570 case DW_LNS_set_file
:
10572 /* The arrays lh->include_dirs and lh->file_names are
10573 0-based, but the directory and file name numbers in
10574 the statement program are 1-based. */
10575 struct file_entry
*fe
;
10578 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10579 line_ptr
+= bytes_read
;
10580 if (lh
->num_file_names
< file
|| file
== 0)
10581 dwarf2_debug_line_missing_file_complaint ();
10584 fe
= &lh
->file_names
[file
- 1];
10586 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10587 if (!decode_for_pst_p
)
10589 last_subfile
= current_subfile
;
10590 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10595 case DW_LNS_set_column
:
10596 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10597 line_ptr
+= bytes_read
;
10599 case DW_LNS_negate_stmt
:
10600 is_stmt
= (!is_stmt
);
10602 case DW_LNS_set_basic_block
:
10605 /* Add to the address register of the state machine the
10606 address increment value corresponding to special opcode
10607 255. I.e., this value is scaled by the minimum
10608 instruction length since special opcode 255 would have
10609 scaled the increment. */
10610 case DW_LNS_const_add_pc
:
10612 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10614 address
+= (((op_index
+ adjust
)
10615 / lh
->maximum_ops_per_instruction
)
10616 * lh
->minimum_instruction_length
);
10617 op_index
= ((op_index
+ adjust
)
10618 % lh
->maximum_ops_per_instruction
);
10621 case DW_LNS_fixed_advance_pc
:
10622 address
+= read_2_bytes (abfd
, line_ptr
);
10628 /* Unknown standard opcode, ignore it. */
10631 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10633 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10634 line_ptr
+= bytes_read
;
10639 if (lh
->num_file_names
< file
|| file
== 0)
10640 dwarf2_debug_line_missing_file_complaint ();
10643 lh
->file_names
[file
- 1].included_p
= 1;
10644 if (!decode_for_pst_p
)
10646 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10647 record_line (current_subfile
, 0, addr
);
10652 if (decode_for_pst_p
)
10656 /* Now that we're done scanning the Line Header Program, we can
10657 create the psymtab of each included file. */
10658 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10659 if (lh
->file_names
[file_index
].included_p
== 1)
10661 char *include_name
=
10662 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10663 if (include_name
!= NULL
)
10664 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10669 /* Make sure a symtab is created for every file, even files
10670 which contain only variables (i.e. no code with associated
10674 struct file_entry
*fe
;
10676 for (i
= 0; i
< lh
->num_file_names
; i
++)
10680 fe
= &lh
->file_names
[i
];
10682 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10683 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10685 /* Skip the main file; we don't need it, and it must be
10686 allocated last, so that it will show up before the
10687 non-primary symtabs in the objfile's symtab list. */
10688 if (current_subfile
== first_subfile
)
10691 if (current_subfile
->symtab
== NULL
)
10692 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10694 fe
->symtab
= current_subfile
->symtab
;
10699 /* Start a subfile for DWARF. FILENAME is the name of the file and
10700 DIRNAME the name of the source directory which contains FILENAME
10701 or NULL if not known. COMP_DIR is the compilation directory for the
10702 linetable's compilation unit or NULL if not known.
10703 This routine tries to keep line numbers from identical absolute and
10704 relative file names in a common subfile.
10706 Using the `list' example from the GDB testsuite, which resides in
10707 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10708 of /srcdir/list0.c yields the following debugging information for list0.c:
10710 DW_AT_name: /srcdir/list0.c
10711 DW_AT_comp_dir: /compdir
10712 files.files[0].name: list0.h
10713 files.files[0].dir: /srcdir
10714 files.files[1].name: list0.c
10715 files.files[1].dir: /srcdir
10717 The line number information for list0.c has to end up in a single
10718 subfile, so that `break /srcdir/list0.c:1' works as expected.
10719 start_subfile will ensure that this happens provided that we pass the
10720 concatenation of files.files[1].dir and files.files[1].name as the
10724 dwarf2_start_subfile (char *filename
, const char *dirname
,
10725 const char *comp_dir
)
10729 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10730 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10731 second argument to start_subfile. To be consistent, we do the
10732 same here. In order not to lose the line information directory,
10733 we concatenate it to the filename when it makes sense.
10734 Note that the Dwarf3 standard says (speaking of filenames in line
10735 information): ``The directory index is ignored for file names
10736 that represent full path names''. Thus ignoring dirname in the
10737 `else' branch below isn't an issue. */
10739 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10740 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10742 fullname
= filename
;
10744 start_subfile (fullname
, comp_dir
);
10746 if (fullname
!= filename
)
10751 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10752 struct dwarf2_cu
*cu
)
10754 struct objfile
*objfile
= cu
->objfile
;
10755 struct comp_unit_head
*cu_header
= &cu
->header
;
10757 /* NOTE drow/2003-01-30: There used to be a comment and some special
10758 code here to turn a symbol with DW_AT_external and a
10759 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10760 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10761 with some versions of binutils) where shared libraries could have
10762 relocations against symbols in their debug information - the
10763 minimal symbol would have the right address, but the debug info
10764 would not. It's no longer necessary, because we will explicitly
10765 apply relocations when we read in the debug information now. */
10767 /* A DW_AT_location attribute with no contents indicates that a
10768 variable has been optimized away. */
10769 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10771 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10775 /* Handle one degenerate form of location expression specially, to
10776 preserve GDB's previous behavior when section offsets are
10777 specified. If this is just a DW_OP_addr then mark this symbol
10780 if (attr_form_is_block (attr
)
10781 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10782 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10784 unsigned int dummy
;
10786 SYMBOL_VALUE_ADDRESS (sym
) =
10787 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10788 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10789 fixup_symbol_section (sym
, objfile
);
10790 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10791 SYMBOL_SECTION (sym
));
10795 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10796 expression evaluator, and use LOC_COMPUTED only when necessary
10797 (i.e. when the value of a register or memory location is
10798 referenced, or a thread-local block, etc.). Then again, it might
10799 not be worthwhile. I'm assuming that it isn't unless performance
10800 or memory numbers show me otherwise. */
10802 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10803 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10806 /* Given a pointer to a DWARF information entry, figure out if we need
10807 to make a symbol table entry for it, and if so, create a new entry
10808 and return a pointer to it.
10809 If TYPE is NULL, determine symbol type from the die, otherwise
10810 used the passed type.
10811 If SPACE is not NULL, use it to hold the new symbol. If it is
10812 NULL, allocate a new symbol on the objfile's obstack. */
10814 static struct symbol
*
10815 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10816 struct symbol
*space
)
10818 struct objfile
*objfile
= cu
->objfile
;
10819 struct symbol
*sym
= NULL
;
10821 struct attribute
*attr
= NULL
;
10822 struct attribute
*attr2
= NULL
;
10823 CORE_ADDR baseaddr
;
10824 struct pending
**list_to_add
= NULL
;
10826 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10828 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10830 name
= dwarf2_name (die
, cu
);
10833 const char *linkagename
;
10834 int suppress_add
= 0;
10839 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10840 OBJSTAT (objfile
, n_syms
++);
10842 /* Cache this symbol's name and the name's demangled form (if any). */
10843 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10844 linkagename
= dwarf2_physname (name
, die
, cu
);
10845 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10847 /* Fortran does not have mangling standard and the mangling does differ
10848 between gfortran, iFort etc. */
10849 if (cu
->language
== language_fortran
10850 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10851 symbol_set_demangled_name (&(sym
->ginfo
),
10852 (char *) dwarf2_full_name (name
, die
, cu
),
10855 /* Default assumptions.
10856 Use the passed type or decode it from the die. */
10857 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10858 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10860 SYMBOL_TYPE (sym
) = type
;
10862 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10863 attr
= dwarf2_attr (die
,
10864 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10868 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10871 attr
= dwarf2_attr (die
,
10872 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10876 int file_index
= DW_UNSND (attr
);
10878 if (cu
->line_header
== NULL
10879 || file_index
> cu
->line_header
->num_file_names
)
10880 complaint (&symfile_complaints
,
10881 _("file index out of range"));
10882 else if (file_index
> 0)
10884 struct file_entry
*fe
;
10886 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10887 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10894 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10897 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10899 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10900 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10901 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10902 add_symbol_to_list (sym
, cu
->list_in_scope
);
10904 case DW_TAG_subprogram
:
10905 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10907 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10908 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10909 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10910 || cu
->language
== language_ada
)
10912 /* Subprograms marked external are stored as a global symbol.
10913 Ada subprograms, whether marked external or not, are always
10914 stored as a global symbol, because we want to be able to
10915 access them globally. For instance, we want to be able
10916 to break on a nested subprogram without having to
10917 specify the context. */
10918 list_to_add
= &global_symbols
;
10922 list_to_add
= cu
->list_in_scope
;
10925 case DW_TAG_inlined_subroutine
:
10926 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10928 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10929 SYMBOL_INLINED (sym
) = 1;
10930 /* Do not add the symbol to any lists. It will be found via
10931 BLOCK_FUNCTION from the blockvector. */
10933 case DW_TAG_template_value_param
:
10935 /* Fall through. */
10936 case DW_TAG_constant
:
10937 case DW_TAG_variable
:
10938 case DW_TAG_member
:
10939 /* Compilation with minimal debug info may result in
10940 variables with missing type entries. Change the
10941 misleading `void' type to something sensible. */
10942 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10944 = objfile_type (objfile
)->nodebug_data_symbol
;
10946 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10947 /* In the case of DW_TAG_member, we should only be called for
10948 static const members. */
10949 if (die
->tag
== DW_TAG_member
)
10951 /* dwarf2_add_field uses die_is_declaration,
10952 so we do the same. */
10953 gdb_assert (die_is_declaration (die
, cu
));
10958 dwarf2_const_value (attr
, sym
, cu
);
10959 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10962 if (attr2
&& (DW_UNSND (attr2
) != 0))
10963 list_to_add
= &global_symbols
;
10965 list_to_add
= cu
->list_in_scope
;
10969 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10972 var_decode_location (attr
, sym
, cu
);
10973 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10974 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10975 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10976 && !dwarf2_per_objfile
->has_section_at_zero
)
10978 /* When a static variable is eliminated by the linker,
10979 the corresponding debug information is not stripped
10980 out, but the variable address is set to null;
10981 do not add such variables into symbol table. */
10983 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10985 /* Workaround gfortran PR debug/40040 - it uses
10986 DW_AT_location for variables in -fPIC libraries which may
10987 get overriden by other libraries/executable and get
10988 a different address. Resolve it by the minimal symbol
10989 which may come from inferior's executable using copy
10990 relocation. Make this workaround only for gfortran as for
10991 other compilers GDB cannot guess the minimal symbol
10992 Fortran mangling kind. */
10993 if (cu
->language
== language_fortran
&& die
->parent
10994 && die
->parent
->tag
== DW_TAG_module
10996 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10997 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10999 /* A variable with DW_AT_external is never static,
11000 but it may be block-scoped. */
11001 list_to_add
= (cu
->list_in_scope
== &file_symbols
11002 ? &global_symbols
: cu
->list_in_scope
);
11005 list_to_add
= cu
->list_in_scope
;
11009 /* We do not know the address of this symbol.
11010 If it is an external symbol and we have type information
11011 for it, enter the symbol as a LOC_UNRESOLVED symbol.
11012 The address of the variable will then be determined from
11013 the minimal symbol table whenever the variable is
11015 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11016 if (attr2
&& (DW_UNSND (attr2
) != 0)
11017 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
11019 /* A variable with DW_AT_external is never static, but it
11020 may be block-scoped. */
11021 list_to_add
= (cu
->list_in_scope
== &file_symbols
11022 ? &global_symbols
: cu
->list_in_scope
);
11024 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11026 else if (!die_is_declaration (die
, cu
))
11028 /* Use the default LOC_OPTIMIZED_OUT class. */
11029 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
11031 list_to_add
= cu
->list_in_scope
;
11035 case DW_TAG_formal_parameter
:
11036 /* If we are inside a function, mark this as an argument. If
11037 not, we might be looking at an argument to an inlined function
11038 when we do not have enough information to show inlined frames;
11039 pretend it's a local variable in that case so that the user can
11041 if (context_stack_depth
> 0
11042 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
11043 SYMBOL_IS_ARGUMENT (sym
) = 1;
11044 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11047 var_decode_location (attr
, sym
, cu
);
11049 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11052 dwarf2_const_value (attr
, sym
, cu
);
11054 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
11055 if (attr
&& DW_UNSND (attr
))
11057 struct type
*ref_type
;
11059 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
11060 SYMBOL_TYPE (sym
) = ref_type
;
11063 list_to_add
= cu
->list_in_scope
;
11065 case DW_TAG_unspecified_parameters
:
11066 /* From varargs functions; gdb doesn't seem to have any
11067 interest in this information, so just ignore it for now.
11070 case DW_TAG_template_type_param
:
11072 /* Fall through. */
11073 case DW_TAG_class_type
:
11074 case DW_TAG_interface_type
:
11075 case DW_TAG_structure_type
:
11076 case DW_TAG_union_type
:
11077 case DW_TAG_set_type
:
11078 case DW_TAG_enumeration_type
:
11079 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11080 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
11083 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11084 really ever be static objects: otherwise, if you try
11085 to, say, break of a class's method and you're in a file
11086 which doesn't mention that class, it won't work unless
11087 the check for all static symbols in lookup_symbol_aux
11088 saves you. See the OtherFileClass tests in
11089 gdb.c++/namespace.exp. */
11093 list_to_add
= (cu
->list_in_scope
== &file_symbols
11094 && (cu
->language
== language_cplus
11095 || cu
->language
== language_java
)
11096 ? &global_symbols
: cu
->list_in_scope
);
11098 /* The semantics of C++ state that "struct foo {
11099 ... }" also defines a typedef for "foo". A Java
11100 class declaration also defines a typedef for the
11102 if (cu
->language
== language_cplus
11103 || cu
->language
== language_java
11104 || cu
->language
== language_ada
)
11106 /* The symbol's name is already allocated along
11107 with this objfile, so we don't need to
11108 duplicate it for the type. */
11109 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
11110 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
11115 case DW_TAG_typedef
:
11116 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11117 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11118 list_to_add
= cu
->list_in_scope
;
11120 case DW_TAG_base_type
:
11121 case DW_TAG_subrange_type
:
11122 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11123 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11124 list_to_add
= cu
->list_in_scope
;
11126 case DW_TAG_enumerator
:
11127 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11130 dwarf2_const_value (attr
, sym
, cu
);
11133 /* NOTE: carlton/2003-11-10: See comment above in the
11134 DW_TAG_class_type, etc. block. */
11136 list_to_add
= (cu
->list_in_scope
== &file_symbols
11137 && (cu
->language
== language_cplus
11138 || cu
->language
== language_java
)
11139 ? &global_symbols
: cu
->list_in_scope
);
11142 case DW_TAG_namespace
:
11143 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11144 list_to_add
= &global_symbols
;
11147 /* Not a tag we recognize. Hopefully we aren't processing
11148 trash data, but since we must specifically ignore things
11149 we don't recognize, there is nothing else we should do at
11151 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
11152 dwarf_tag_name (die
->tag
));
11158 sym
->hash_next
= objfile
->template_symbols
;
11159 objfile
->template_symbols
= sym
;
11160 list_to_add
= NULL
;
11163 if (list_to_add
!= NULL
)
11164 add_symbol_to_list (sym
, list_to_add
);
11166 /* For the benefit of old versions of GCC, check for anonymous
11167 namespaces based on the demangled name. */
11168 if (!processing_has_namespace_info
11169 && cu
->language
== language_cplus
)
11170 cp_scan_for_anonymous_namespaces (sym
);
11175 /* A wrapper for new_symbol_full that always allocates a new symbol. */
11177 static struct symbol
*
11178 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11180 return new_symbol_full (die
, type
, cu
, NULL
);
11183 /* Given an attr with a DW_FORM_dataN value in host byte order,
11184 zero-extend it as appropriate for the symbol's type. The DWARF
11185 standard (v4) is not entirely clear about the meaning of using
11186 DW_FORM_dataN for a constant with a signed type, where the type is
11187 wider than the data. The conclusion of a discussion on the DWARF
11188 list was that this is unspecified. We choose to always zero-extend
11189 because that is the interpretation long in use by GCC. */
11192 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
11193 const char *name
, struct obstack
*obstack
,
11194 struct dwarf2_cu
*cu
, long *value
, int bits
)
11196 struct objfile
*objfile
= cu
->objfile
;
11197 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
11198 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
11199 LONGEST l
= DW_UNSND (attr
);
11201 if (bits
< sizeof (*value
) * 8)
11203 l
&= ((LONGEST
) 1 << bits
) - 1;
11206 else if (bits
== sizeof (*value
) * 8)
11210 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
11211 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
11218 /* Read a constant value from an attribute. Either set *VALUE, or if
11219 the value does not fit in *VALUE, set *BYTES - either already
11220 allocated on the objfile obstack, or newly allocated on OBSTACK,
11221 or, set *BATON, if we translated the constant to a location
11225 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
11226 const char *name
, struct obstack
*obstack
,
11227 struct dwarf2_cu
*cu
,
11228 long *value
, gdb_byte
**bytes
,
11229 struct dwarf2_locexpr_baton
**baton
)
11231 struct objfile
*objfile
= cu
->objfile
;
11232 struct comp_unit_head
*cu_header
= &cu
->header
;
11233 struct dwarf_block
*blk
;
11234 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
11235 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
11241 switch (attr
->form
)
11247 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
11248 dwarf2_const_value_length_mismatch_complaint (name
,
11249 cu_header
->addr_size
,
11250 TYPE_LENGTH (type
));
11251 /* Symbols of this form are reasonably rare, so we just
11252 piggyback on the existing location code rather than writing
11253 a new implementation of symbol_computed_ops. */
11254 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
11255 sizeof (struct dwarf2_locexpr_baton
));
11256 (*baton
)->per_cu
= cu
->per_cu
;
11257 gdb_assert ((*baton
)->per_cu
);
11259 (*baton
)->size
= 2 + cu_header
->addr_size
;
11260 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
11261 (*baton
)->data
= data
;
11263 data
[0] = DW_OP_addr
;
11264 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
11265 byte_order
, DW_ADDR (attr
));
11266 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
11269 case DW_FORM_string
:
11271 /* DW_STRING is already allocated on the objfile obstack, point
11273 *bytes
= (gdb_byte
*) DW_STRING (attr
);
11275 case DW_FORM_block1
:
11276 case DW_FORM_block2
:
11277 case DW_FORM_block4
:
11278 case DW_FORM_block
:
11279 case DW_FORM_exprloc
:
11280 blk
= DW_BLOCK (attr
);
11281 if (TYPE_LENGTH (type
) != blk
->size
)
11282 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
11283 TYPE_LENGTH (type
));
11284 *bytes
= blk
->data
;
11287 /* The DW_AT_const_value attributes are supposed to carry the
11288 symbol's value "represented as it would be on the target
11289 architecture." By the time we get here, it's already been
11290 converted to host endianness, so we just need to sign- or
11291 zero-extend it as appropriate. */
11292 case DW_FORM_data1
:
11293 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11294 obstack
, cu
, value
, 8);
11296 case DW_FORM_data2
:
11297 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11298 obstack
, cu
, value
, 16);
11300 case DW_FORM_data4
:
11301 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11302 obstack
, cu
, value
, 32);
11304 case DW_FORM_data8
:
11305 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
11306 obstack
, cu
, value
, 64);
11309 case DW_FORM_sdata
:
11310 *value
= DW_SND (attr
);
11313 case DW_FORM_udata
:
11314 *value
= DW_UNSND (attr
);
11318 complaint (&symfile_complaints
,
11319 _("unsupported const value attribute form: '%s'"),
11320 dwarf_form_name (attr
->form
));
11327 /* Copy constant value from an attribute to a symbol. */
11330 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
11331 struct dwarf2_cu
*cu
)
11333 struct objfile
*objfile
= cu
->objfile
;
11334 struct comp_unit_head
*cu_header
= &cu
->header
;
11337 struct dwarf2_locexpr_baton
*baton
;
11339 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
11340 SYMBOL_PRINT_NAME (sym
),
11341 &objfile
->objfile_obstack
, cu
,
11342 &value
, &bytes
, &baton
);
11346 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11347 SYMBOL_LOCATION_BATON (sym
) = baton
;
11348 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11350 else if (bytes
!= NULL
)
11352 SYMBOL_VALUE_BYTES (sym
) = bytes
;
11353 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11357 SYMBOL_VALUE (sym
) = value
;
11358 SYMBOL_CLASS (sym
) = LOC_CONST
;
11362 /* Return the type of the die in question using its DW_AT_type attribute. */
11364 static struct type
*
11365 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11367 struct attribute
*type_attr
;
11369 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11372 /* A missing DW_AT_type represents a void type. */
11373 return objfile_type (cu
->objfile
)->builtin_void
;
11376 return lookup_die_type (die
, type_attr
, cu
);
11379 /* True iff CU's producer generates GNAT Ada auxiliary information
11380 that allows to find parallel types through that information instead
11381 of having to do expensive parallel lookups by type name. */
11384 need_gnat_info (struct dwarf2_cu
*cu
)
11386 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11387 of GNAT produces this auxiliary information, without any indication
11388 that it is produced. Part of enhancing the FSF version of GNAT
11389 to produce that information will be to put in place an indicator
11390 that we can use in order to determine whether the descriptive type
11391 info is available or not. One suggestion that has been made is
11392 to use a new attribute, attached to the CU die. For now, assume
11393 that the descriptive type info is not available. */
11397 /* Return the auxiliary type of the die in question using its
11398 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11399 attribute is not present. */
11401 static struct type
*
11402 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11404 struct attribute
*type_attr
;
11406 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11410 return lookup_die_type (die
, type_attr
, cu
);
11413 /* If DIE has a descriptive_type attribute, then set the TYPE's
11414 descriptive type accordingly. */
11417 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11418 struct dwarf2_cu
*cu
)
11420 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11422 if (descriptive_type
)
11424 ALLOCATE_GNAT_AUX_TYPE (type
);
11425 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11429 /* Return the containing type of the die in question using its
11430 DW_AT_containing_type attribute. */
11432 static struct type
*
11433 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11435 struct attribute
*type_attr
;
11437 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11439 error (_("Dwarf Error: Problem turning containing type into gdb type "
11440 "[in module %s]"), cu
->objfile
->name
);
11442 return lookup_die_type (die
, type_attr
, cu
);
11445 /* Look up the type of DIE in CU using its type attribute ATTR.
11446 If there is no type substitute an error marker. */
11448 static struct type
*
11449 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11450 struct dwarf2_cu
*cu
)
11452 struct type
*this_type
;
11454 /* First see if we have it cached. */
11456 if (is_ref_attr (attr
))
11458 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11460 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11462 else if (attr
->form
== DW_FORM_sig8
)
11464 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11465 struct dwarf2_cu
*sig_cu
;
11466 unsigned int offset
;
11468 /* sig_type will be NULL if the signatured type is missing from
11470 if (sig_type
== NULL
)
11471 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11472 "at 0x%x [in module %s]"),
11473 die
->offset
, cu
->objfile
->name
);
11475 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11476 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11477 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11481 dump_die_for_error (die
);
11482 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11483 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11486 /* If not cached we need to read it in. */
11488 if (this_type
== NULL
)
11490 struct die_info
*type_die
;
11491 struct dwarf2_cu
*type_cu
= cu
;
11493 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11494 /* If the type is cached, we should have found it above. */
11495 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11496 this_type
= read_type_die_1 (type_die
, type_cu
);
11499 /* If we still don't have a type use an error marker. */
11501 if (this_type
== NULL
)
11503 char *message
, *saved
;
11505 /* read_type_die already issued a complaint. */
11506 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11510 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11511 message
, strlen (message
));
11514 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11520 /* Return the type in DIE, CU.
11521 Returns NULL for invalid types.
11523 This first does a lookup in the appropriate type_hash table,
11524 and only reads the die in if necessary.
11526 NOTE: This can be called when reading in partial or full symbols. */
11528 static struct type
*
11529 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11531 struct type
*this_type
;
11533 this_type
= get_die_type (die
, cu
);
11537 return read_type_die_1 (die
, cu
);
11540 /* Read the type in DIE, CU.
11541 Returns NULL for invalid types. */
11543 static struct type
*
11544 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11546 struct type
*this_type
= NULL
;
11550 case DW_TAG_class_type
:
11551 case DW_TAG_interface_type
:
11552 case DW_TAG_structure_type
:
11553 case DW_TAG_union_type
:
11554 this_type
= read_structure_type (die
, cu
);
11556 case DW_TAG_enumeration_type
:
11557 this_type
= read_enumeration_type (die
, cu
);
11559 case DW_TAG_subprogram
:
11560 case DW_TAG_subroutine_type
:
11561 case DW_TAG_inlined_subroutine
:
11562 this_type
= read_subroutine_type (die
, cu
);
11564 case DW_TAG_array_type
:
11565 this_type
= read_array_type (die
, cu
);
11567 case DW_TAG_set_type
:
11568 this_type
= read_set_type (die
, cu
);
11570 case DW_TAG_pointer_type
:
11571 this_type
= read_tag_pointer_type (die
, cu
);
11573 case DW_TAG_ptr_to_member_type
:
11574 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11576 case DW_TAG_reference_type
:
11577 this_type
= read_tag_reference_type (die
, cu
);
11579 case DW_TAG_const_type
:
11580 this_type
= read_tag_const_type (die
, cu
);
11582 case DW_TAG_volatile_type
:
11583 this_type
= read_tag_volatile_type (die
, cu
);
11585 case DW_TAG_string_type
:
11586 this_type
= read_tag_string_type (die
, cu
);
11588 case DW_TAG_typedef
:
11589 this_type
= read_typedef (die
, cu
);
11591 case DW_TAG_subrange_type
:
11592 this_type
= read_subrange_type (die
, cu
);
11594 case DW_TAG_base_type
:
11595 this_type
= read_base_type (die
, cu
);
11597 case DW_TAG_unspecified_type
:
11598 this_type
= read_unspecified_type (die
, cu
);
11600 case DW_TAG_namespace
:
11601 this_type
= read_namespace_type (die
, cu
);
11603 case DW_TAG_module
:
11604 this_type
= read_module_type (die
, cu
);
11607 complaint (&symfile_complaints
,
11608 _("unexpected tag in read_type_die: '%s'"),
11609 dwarf_tag_name (die
->tag
));
11616 /* See if we can figure out if the class lives in a namespace. We do
11617 this by looking for a member function; its demangled name will
11618 contain namespace info, if there is any.
11619 Return the computed name or NULL.
11620 Space for the result is allocated on the objfile's obstack.
11621 This is the full-die version of guess_partial_die_structure_name.
11622 In this case we know DIE has no useful parent. */
11625 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11627 struct die_info
*spec_die
;
11628 struct dwarf2_cu
*spec_cu
;
11629 struct die_info
*child
;
11632 spec_die
= die_specification (die
, &spec_cu
);
11633 if (spec_die
!= NULL
)
11639 for (child
= die
->child
;
11641 child
= child
->sibling
)
11643 if (child
->tag
== DW_TAG_subprogram
)
11645 struct attribute
*attr
;
11647 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
11649 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
11653 = language_class_name_from_physname (cu
->language_defn
,
11657 if (actual_name
!= NULL
)
11659 char *die_name
= dwarf2_name (die
, cu
);
11661 if (die_name
!= NULL
11662 && strcmp (die_name
, actual_name
) != 0)
11664 /* Strip off the class name from the full name.
11665 We want the prefix. */
11666 int die_name_len
= strlen (die_name
);
11667 int actual_name_len
= strlen (actual_name
);
11669 /* Test for '::' as a sanity check. */
11670 if (actual_name_len
> die_name_len
+ 2
11671 && actual_name
[actual_name_len
11672 - die_name_len
- 1] == ':')
11674 obsavestring (actual_name
,
11675 actual_name_len
- die_name_len
- 2,
11676 &cu
->objfile
->objfile_obstack
);
11679 xfree (actual_name
);
11688 /* Return the name of the namespace/class that DIE is defined within,
11689 or "" if we can't tell. The caller should not xfree the result.
11691 For example, if we're within the method foo() in the following
11701 then determine_prefix on foo's die will return "N::C". */
11704 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11706 struct die_info
*parent
, *spec_die
;
11707 struct dwarf2_cu
*spec_cu
;
11708 struct type
*parent_type
;
11710 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11711 && cu
->language
!= language_fortran
)
11714 /* We have to be careful in the presence of DW_AT_specification.
11715 For example, with GCC 3.4, given the code
11719 // Definition of N::foo.
11723 then we'll have a tree of DIEs like this:
11725 1: DW_TAG_compile_unit
11726 2: DW_TAG_namespace // N
11727 3: DW_TAG_subprogram // declaration of N::foo
11728 4: DW_TAG_subprogram // definition of N::foo
11729 DW_AT_specification // refers to die #3
11731 Thus, when processing die #4, we have to pretend that we're in
11732 the context of its DW_AT_specification, namely the contex of die
11735 spec_die
= die_specification (die
, &spec_cu
);
11736 if (spec_die
== NULL
)
11737 parent
= die
->parent
;
11740 parent
= spec_die
->parent
;
11744 if (parent
== NULL
)
11746 else if (parent
->building_fullname
)
11749 const char *parent_name
;
11751 /* It has been seen on RealView 2.2 built binaries,
11752 DW_TAG_template_type_param types actually _defined_ as
11753 children of the parent class:
11756 template class <class Enum> Class{};
11757 Class<enum E> class_e;
11759 1: DW_TAG_class_type (Class)
11760 2: DW_TAG_enumeration_type (E)
11761 3: DW_TAG_enumerator (enum1:0)
11762 3: DW_TAG_enumerator (enum2:1)
11764 2: DW_TAG_template_type_param
11765 DW_AT_type DW_FORM_ref_udata (E)
11767 Besides being broken debug info, it can put GDB into an
11768 infinite loop. Consider:
11770 When we're building the full name for Class<E>, we'll start
11771 at Class, and go look over its template type parameters,
11772 finding E. We'll then try to build the full name of E, and
11773 reach here. We're now trying to build the full name of E,
11774 and look over the parent DIE for containing scope. In the
11775 broken case, if we followed the parent DIE of E, we'd again
11776 find Class, and once again go look at its template type
11777 arguments, etc., etc. Simply don't consider such parent die
11778 as source-level parent of this die (it can't be, the language
11779 doesn't allow it), and break the loop here. */
11780 name
= dwarf2_name (die
, cu
);
11781 parent_name
= dwarf2_name (parent
, cu
);
11782 complaint (&symfile_complaints
,
11783 _("template param type '%s' defined within parent '%s'"),
11784 name
? name
: "<unknown>",
11785 parent_name
? parent_name
: "<unknown>");
11789 switch (parent
->tag
)
11791 case DW_TAG_namespace
:
11792 parent_type
= read_type_die (parent
, cu
);
11793 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11794 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11795 Work around this problem here. */
11796 if (cu
->language
== language_cplus
11797 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11799 /* We give a name to even anonymous namespaces. */
11800 return TYPE_TAG_NAME (parent_type
);
11801 case DW_TAG_class_type
:
11802 case DW_TAG_interface_type
:
11803 case DW_TAG_structure_type
:
11804 case DW_TAG_union_type
:
11805 case DW_TAG_module
:
11806 parent_type
= read_type_die (parent
, cu
);
11807 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11808 return TYPE_TAG_NAME (parent_type
);
11810 /* An anonymous structure is only allowed non-static data
11811 members; no typedefs, no member functions, et cetera.
11812 So it does not need a prefix. */
11814 case DW_TAG_compile_unit
:
11815 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
11816 if (cu
->language
== language_cplus
11817 && dwarf2_per_objfile
->types
.asection
!= NULL
11818 && die
->child
!= NULL
11819 && (die
->tag
== DW_TAG_class_type
11820 || die
->tag
== DW_TAG_structure_type
11821 || die
->tag
== DW_TAG_union_type
))
11823 char *name
= guess_full_die_structure_name (die
, cu
);
11829 return determine_prefix (parent
, cu
);
11833 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
11834 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11835 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
11836 an obconcat, otherwise allocate storage for the result. The CU argument is
11837 used to determine the language and hence, the appropriate separator. */
11839 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11842 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11843 int physname
, struct dwarf2_cu
*cu
)
11845 const char *lead
= "";
11848 if (suffix
== NULL
|| suffix
[0] == '\0'
11849 || prefix
== NULL
|| prefix
[0] == '\0')
11851 else if (cu
->language
== language_java
)
11853 else if (cu
->language
== language_fortran
&& physname
)
11855 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11856 DW_AT_MIPS_linkage_name is preferred and used instead. */
11864 if (prefix
== NULL
)
11866 if (suffix
== NULL
)
11872 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11874 strcpy (retval
, lead
);
11875 strcat (retval
, prefix
);
11876 strcat (retval
, sep
);
11877 strcat (retval
, suffix
);
11882 /* We have an obstack. */
11883 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11887 /* Return sibling of die, NULL if no sibling. */
11889 static struct die_info
*
11890 sibling_die (struct die_info
*die
)
11892 return die
->sibling
;
11895 /* Get name of a die, return NULL if not found. */
11898 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11899 struct obstack
*obstack
)
11901 if (name
&& cu
->language
== language_cplus
)
11903 char *canon_name
= cp_canonicalize_string (name
);
11905 if (canon_name
!= NULL
)
11907 if (strcmp (canon_name
, name
) != 0)
11908 name
= obsavestring (canon_name
, strlen (canon_name
),
11910 xfree (canon_name
);
11917 /* Get name of a die, return NULL if not found. */
11920 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11922 struct attribute
*attr
;
11924 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11925 if (!attr
|| !DW_STRING (attr
))
11930 case DW_TAG_compile_unit
:
11931 /* Compilation units have a DW_AT_name that is a filename, not
11932 a source language identifier. */
11933 case DW_TAG_enumeration_type
:
11934 case DW_TAG_enumerator
:
11935 /* These tags always have simple identifiers already; no need
11936 to canonicalize them. */
11937 return DW_STRING (attr
);
11939 case DW_TAG_subprogram
:
11940 /* Java constructors will all be named "<init>", so return
11941 the class name when we see this special case. */
11942 if (cu
->language
== language_java
11943 && DW_STRING (attr
) != NULL
11944 && strcmp (DW_STRING (attr
), "<init>") == 0)
11946 struct dwarf2_cu
*spec_cu
= cu
;
11947 struct die_info
*spec_die
;
11949 /* GCJ will output '<init>' for Java constructor names.
11950 For this special case, return the name of the parent class. */
11952 /* GCJ may output suprogram DIEs with AT_specification set.
11953 If so, use the name of the specified DIE. */
11954 spec_die
= die_specification (die
, &spec_cu
);
11955 if (spec_die
!= NULL
)
11956 return dwarf2_name (spec_die
, spec_cu
);
11961 if (die
->tag
== DW_TAG_class_type
)
11962 return dwarf2_name (die
, cu
);
11964 while (die
->tag
!= DW_TAG_compile_unit
);
11968 case DW_TAG_class_type
:
11969 case DW_TAG_interface_type
:
11970 case DW_TAG_structure_type
:
11971 case DW_TAG_union_type
:
11972 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11973 structures or unions. These were of the form "._%d" in GCC 4.1,
11974 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11975 and GCC 4.4. We work around this problem by ignoring these. */
11976 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11977 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11985 if (!DW_STRING_IS_CANONICAL (attr
))
11988 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11989 &cu
->objfile
->objfile_obstack
);
11990 DW_STRING_IS_CANONICAL (attr
) = 1;
11992 return DW_STRING (attr
);
11995 /* Return the die that this die in an extension of, or NULL if there
11996 is none. *EXT_CU is the CU containing DIE on input, and the CU
11997 containing the return value on output. */
11999 static struct die_info
*
12000 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
12002 struct attribute
*attr
;
12004 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
12008 return follow_die_ref (die
, attr
, ext_cu
);
12011 /* Convert a DIE tag into its string name. */
12014 dwarf_tag_name (unsigned tag
)
12018 case DW_TAG_padding
:
12019 return "DW_TAG_padding";
12020 case DW_TAG_array_type
:
12021 return "DW_TAG_array_type";
12022 case DW_TAG_class_type
:
12023 return "DW_TAG_class_type";
12024 case DW_TAG_entry_point
:
12025 return "DW_TAG_entry_point";
12026 case DW_TAG_enumeration_type
:
12027 return "DW_TAG_enumeration_type";
12028 case DW_TAG_formal_parameter
:
12029 return "DW_TAG_formal_parameter";
12030 case DW_TAG_imported_declaration
:
12031 return "DW_TAG_imported_declaration";
12033 return "DW_TAG_label";
12034 case DW_TAG_lexical_block
:
12035 return "DW_TAG_lexical_block";
12036 case DW_TAG_member
:
12037 return "DW_TAG_member";
12038 case DW_TAG_pointer_type
:
12039 return "DW_TAG_pointer_type";
12040 case DW_TAG_reference_type
:
12041 return "DW_TAG_reference_type";
12042 case DW_TAG_compile_unit
:
12043 return "DW_TAG_compile_unit";
12044 case DW_TAG_string_type
:
12045 return "DW_TAG_string_type";
12046 case DW_TAG_structure_type
:
12047 return "DW_TAG_structure_type";
12048 case DW_TAG_subroutine_type
:
12049 return "DW_TAG_subroutine_type";
12050 case DW_TAG_typedef
:
12051 return "DW_TAG_typedef";
12052 case DW_TAG_union_type
:
12053 return "DW_TAG_union_type";
12054 case DW_TAG_unspecified_parameters
:
12055 return "DW_TAG_unspecified_parameters";
12056 case DW_TAG_variant
:
12057 return "DW_TAG_variant";
12058 case DW_TAG_common_block
:
12059 return "DW_TAG_common_block";
12060 case DW_TAG_common_inclusion
:
12061 return "DW_TAG_common_inclusion";
12062 case DW_TAG_inheritance
:
12063 return "DW_TAG_inheritance";
12064 case DW_TAG_inlined_subroutine
:
12065 return "DW_TAG_inlined_subroutine";
12066 case DW_TAG_module
:
12067 return "DW_TAG_module";
12068 case DW_TAG_ptr_to_member_type
:
12069 return "DW_TAG_ptr_to_member_type";
12070 case DW_TAG_set_type
:
12071 return "DW_TAG_set_type";
12072 case DW_TAG_subrange_type
:
12073 return "DW_TAG_subrange_type";
12074 case DW_TAG_with_stmt
:
12075 return "DW_TAG_with_stmt";
12076 case DW_TAG_access_declaration
:
12077 return "DW_TAG_access_declaration";
12078 case DW_TAG_base_type
:
12079 return "DW_TAG_base_type";
12080 case DW_TAG_catch_block
:
12081 return "DW_TAG_catch_block";
12082 case DW_TAG_const_type
:
12083 return "DW_TAG_const_type";
12084 case DW_TAG_constant
:
12085 return "DW_TAG_constant";
12086 case DW_TAG_enumerator
:
12087 return "DW_TAG_enumerator";
12088 case DW_TAG_file_type
:
12089 return "DW_TAG_file_type";
12090 case DW_TAG_friend
:
12091 return "DW_TAG_friend";
12092 case DW_TAG_namelist
:
12093 return "DW_TAG_namelist";
12094 case DW_TAG_namelist_item
:
12095 return "DW_TAG_namelist_item";
12096 case DW_TAG_packed_type
:
12097 return "DW_TAG_packed_type";
12098 case DW_TAG_subprogram
:
12099 return "DW_TAG_subprogram";
12100 case DW_TAG_template_type_param
:
12101 return "DW_TAG_template_type_param";
12102 case DW_TAG_template_value_param
:
12103 return "DW_TAG_template_value_param";
12104 case DW_TAG_thrown_type
:
12105 return "DW_TAG_thrown_type";
12106 case DW_TAG_try_block
:
12107 return "DW_TAG_try_block";
12108 case DW_TAG_variant_part
:
12109 return "DW_TAG_variant_part";
12110 case DW_TAG_variable
:
12111 return "DW_TAG_variable";
12112 case DW_TAG_volatile_type
:
12113 return "DW_TAG_volatile_type";
12114 case DW_TAG_dwarf_procedure
:
12115 return "DW_TAG_dwarf_procedure";
12116 case DW_TAG_restrict_type
:
12117 return "DW_TAG_restrict_type";
12118 case DW_TAG_interface_type
:
12119 return "DW_TAG_interface_type";
12120 case DW_TAG_namespace
:
12121 return "DW_TAG_namespace";
12122 case DW_TAG_imported_module
:
12123 return "DW_TAG_imported_module";
12124 case DW_TAG_unspecified_type
:
12125 return "DW_TAG_unspecified_type";
12126 case DW_TAG_partial_unit
:
12127 return "DW_TAG_partial_unit";
12128 case DW_TAG_imported_unit
:
12129 return "DW_TAG_imported_unit";
12130 case DW_TAG_condition
:
12131 return "DW_TAG_condition";
12132 case DW_TAG_shared_type
:
12133 return "DW_TAG_shared_type";
12134 case DW_TAG_type_unit
:
12135 return "DW_TAG_type_unit";
12136 case DW_TAG_MIPS_loop
:
12137 return "DW_TAG_MIPS_loop";
12138 case DW_TAG_HP_array_descriptor
:
12139 return "DW_TAG_HP_array_descriptor";
12140 case DW_TAG_format_label
:
12141 return "DW_TAG_format_label";
12142 case DW_TAG_function_template
:
12143 return "DW_TAG_function_template";
12144 case DW_TAG_class_template
:
12145 return "DW_TAG_class_template";
12146 case DW_TAG_GNU_BINCL
:
12147 return "DW_TAG_GNU_BINCL";
12148 case DW_TAG_GNU_EINCL
:
12149 return "DW_TAG_GNU_EINCL";
12150 case DW_TAG_upc_shared_type
:
12151 return "DW_TAG_upc_shared_type";
12152 case DW_TAG_upc_strict_type
:
12153 return "DW_TAG_upc_strict_type";
12154 case DW_TAG_upc_relaxed_type
:
12155 return "DW_TAG_upc_relaxed_type";
12156 case DW_TAG_PGI_kanji_type
:
12157 return "DW_TAG_PGI_kanji_type";
12158 case DW_TAG_PGI_interface_block
:
12159 return "DW_TAG_PGI_interface_block";
12161 return "DW_TAG_<unknown>";
12165 /* Convert a DWARF attribute code into its string name. */
12168 dwarf_attr_name (unsigned attr
)
12172 case DW_AT_sibling
:
12173 return "DW_AT_sibling";
12174 case DW_AT_location
:
12175 return "DW_AT_location";
12177 return "DW_AT_name";
12178 case DW_AT_ordering
:
12179 return "DW_AT_ordering";
12180 case DW_AT_subscr_data
:
12181 return "DW_AT_subscr_data";
12182 case DW_AT_byte_size
:
12183 return "DW_AT_byte_size";
12184 case DW_AT_bit_offset
:
12185 return "DW_AT_bit_offset";
12186 case DW_AT_bit_size
:
12187 return "DW_AT_bit_size";
12188 case DW_AT_element_list
:
12189 return "DW_AT_element_list";
12190 case DW_AT_stmt_list
:
12191 return "DW_AT_stmt_list";
12193 return "DW_AT_low_pc";
12194 case DW_AT_high_pc
:
12195 return "DW_AT_high_pc";
12196 case DW_AT_language
:
12197 return "DW_AT_language";
12199 return "DW_AT_member";
12201 return "DW_AT_discr";
12202 case DW_AT_discr_value
:
12203 return "DW_AT_discr_value";
12204 case DW_AT_visibility
:
12205 return "DW_AT_visibility";
12207 return "DW_AT_import";
12208 case DW_AT_string_length
:
12209 return "DW_AT_string_length";
12210 case DW_AT_common_reference
:
12211 return "DW_AT_common_reference";
12212 case DW_AT_comp_dir
:
12213 return "DW_AT_comp_dir";
12214 case DW_AT_const_value
:
12215 return "DW_AT_const_value";
12216 case DW_AT_containing_type
:
12217 return "DW_AT_containing_type";
12218 case DW_AT_default_value
:
12219 return "DW_AT_default_value";
12221 return "DW_AT_inline";
12222 case DW_AT_is_optional
:
12223 return "DW_AT_is_optional";
12224 case DW_AT_lower_bound
:
12225 return "DW_AT_lower_bound";
12226 case DW_AT_producer
:
12227 return "DW_AT_producer";
12228 case DW_AT_prototyped
:
12229 return "DW_AT_prototyped";
12230 case DW_AT_return_addr
:
12231 return "DW_AT_return_addr";
12232 case DW_AT_start_scope
:
12233 return "DW_AT_start_scope";
12234 case DW_AT_bit_stride
:
12235 return "DW_AT_bit_stride";
12236 case DW_AT_upper_bound
:
12237 return "DW_AT_upper_bound";
12238 case DW_AT_abstract_origin
:
12239 return "DW_AT_abstract_origin";
12240 case DW_AT_accessibility
:
12241 return "DW_AT_accessibility";
12242 case DW_AT_address_class
:
12243 return "DW_AT_address_class";
12244 case DW_AT_artificial
:
12245 return "DW_AT_artificial";
12246 case DW_AT_base_types
:
12247 return "DW_AT_base_types";
12248 case DW_AT_calling_convention
:
12249 return "DW_AT_calling_convention";
12251 return "DW_AT_count";
12252 case DW_AT_data_member_location
:
12253 return "DW_AT_data_member_location";
12254 case DW_AT_decl_column
:
12255 return "DW_AT_decl_column";
12256 case DW_AT_decl_file
:
12257 return "DW_AT_decl_file";
12258 case DW_AT_decl_line
:
12259 return "DW_AT_decl_line";
12260 case DW_AT_declaration
:
12261 return "DW_AT_declaration";
12262 case DW_AT_discr_list
:
12263 return "DW_AT_discr_list";
12264 case DW_AT_encoding
:
12265 return "DW_AT_encoding";
12266 case DW_AT_external
:
12267 return "DW_AT_external";
12268 case DW_AT_frame_base
:
12269 return "DW_AT_frame_base";
12271 return "DW_AT_friend";
12272 case DW_AT_identifier_case
:
12273 return "DW_AT_identifier_case";
12274 case DW_AT_macro_info
:
12275 return "DW_AT_macro_info";
12276 case DW_AT_namelist_items
:
12277 return "DW_AT_namelist_items";
12278 case DW_AT_priority
:
12279 return "DW_AT_priority";
12280 case DW_AT_segment
:
12281 return "DW_AT_segment";
12282 case DW_AT_specification
:
12283 return "DW_AT_specification";
12284 case DW_AT_static_link
:
12285 return "DW_AT_static_link";
12287 return "DW_AT_type";
12288 case DW_AT_use_location
:
12289 return "DW_AT_use_location";
12290 case DW_AT_variable_parameter
:
12291 return "DW_AT_variable_parameter";
12292 case DW_AT_virtuality
:
12293 return "DW_AT_virtuality";
12294 case DW_AT_vtable_elem_location
:
12295 return "DW_AT_vtable_elem_location";
12296 /* DWARF 3 values. */
12297 case DW_AT_allocated
:
12298 return "DW_AT_allocated";
12299 case DW_AT_associated
:
12300 return "DW_AT_associated";
12301 case DW_AT_data_location
:
12302 return "DW_AT_data_location";
12303 case DW_AT_byte_stride
:
12304 return "DW_AT_byte_stride";
12305 case DW_AT_entry_pc
:
12306 return "DW_AT_entry_pc";
12307 case DW_AT_use_UTF8
:
12308 return "DW_AT_use_UTF8";
12309 case DW_AT_extension
:
12310 return "DW_AT_extension";
12312 return "DW_AT_ranges";
12313 case DW_AT_trampoline
:
12314 return "DW_AT_trampoline";
12315 case DW_AT_call_column
:
12316 return "DW_AT_call_column";
12317 case DW_AT_call_file
:
12318 return "DW_AT_call_file";
12319 case DW_AT_call_line
:
12320 return "DW_AT_call_line";
12321 case DW_AT_description
:
12322 return "DW_AT_description";
12323 case DW_AT_binary_scale
:
12324 return "DW_AT_binary_scale";
12325 case DW_AT_decimal_scale
:
12326 return "DW_AT_decimal_scale";
12328 return "DW_AT_small";
12329 case DW_AT_decimal_sign
:
12330 return "DW_AT_decimal_sign";
12331 case DW_AT_digit_count
:
12332 return "DW_AT_digit_count";
12333 case DW_AT_picture_string
:
12334 return "DW_AT_picture_string";
12335 case DW_AT_mutable
:
12336 return "DW_AT_mutable";
12337 case DW_AT_threads_scaled
:
12338 return "DW_AT_threads_scaled";
12339 case DW_AT_explicit
:
12340 return "DW_AT_explicit";
12341 case DW_AT_object_pointer
:
12342 return "DW_AT_object_pointer";
12343 case DW_AT_endianity
:
12344 return "DW_AT_endianity";
12345 case DW_AT_elemental
:
12346 return "DW_AT_elemental";
12348 return "DW_AT_pure";
12349 case DW_AT_recursive
:
12350 return "DW_AT_recursive";
12351 /* DWARF 4 values. */
12352 case DW_AT_signature
:
12353 return "DW_AT_signature";
12354 case DW_AT_linkage_name
:
12355 return "DW_AT_linkage_name";
12356 /* SGI/MIPS extensions. */
12357 #ifdef MIPS /* collides with DW_AT_HP_block_index */
12358 case DW_AT_MIPS_fde
:
12359 return "DW_AT_MIPS_fde";
12361 case DW_AT_MIPS_loop_begin
:
12362 return "DW_AT_MIPS_loop_begin";
12363 case DW_AT_MIPS_tail_loop_begin
:
12364 return "DW_AT_MIPS_tail_loop_begin";
12365 case DW_AT_MIPS_epilog_begin
:
12366 return "DW_AT_MIPS_epilog_begin";
12367 case DW_AT_MIPS_loop_unroll_factor
:
12368 return "DW_AT_MIPS_loop_unroll_factor";
12369 case DW_AT_MIPS_software_pipeline_depth
:
12370 return "DW_AT_MIPS_software_pipeline_depth";
12371 case DW_AT_MIPS_linkage_name
:
12372 return "DW_AT_MIPS_linkage_name";
12373 case DW_AT_MIPS_stride
:
12374 return "DW_AT_MIPS_stride";
12375 case DW_AT_MIPS_abstract_name
:
12376 return "DW_AT_MIPS_abstract_name";
12377 case DW_AT_MIPS_clone_origin
:
12378 return "DW_AT_MIPS_clone_origin";
12379 case DW_AT_MIPS_has_inlines
:
12380 return "DW_AT_MIPS_has_inlines";
12381 /* HP extensions. */
12382 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
12383 case DW_AT_HP_block_index
:
12384 return "DW_AT_HP_block_index";
12386 case DW_AT_HP_unmodifiable
:
12387 return "DW_AT_HP_unmodifiable";
12388 case DW_AT_HP_actuals_stmt_list
:
12389 return "DW_AT_HP_actuals_stmt_list";
12390 case DW_AT_HP_proc_per_section
:
12391 return "DW_AT_HP_proc_per_section";
12392 case DW_AT_HP_raw_data_ptr
:
12393 return "DW_AT_HP_raw_data_ptr";
12394 case DW_AT_HP_pass_by_reference
:
12395 return "DW_AT_HP_pass_by_reference";
12396 case DW_AT_HP_opt_level
:
12397 return "DW_AT_HP_opt_level";
12398 case DW_AT_HP_prof_version_id
:
12399 return "DW_AT_HP_prof_version_id";
12400 case DW_AT_HP_opt_flags
:
12401 return "DW_AT_HP_opt_flags";
12402 case DW_AT_HP_cold_region_low_pc
:
12403 return "DW_AT_HP_cold_region_low_pc";
12404 case DW_AT_HP_cold_region_high_pc
:
12405 return "DW_AT_HP_cold_region_high_pc";
12406 case DW_AT_HP_all_variables_modifiable
:
12407 return "DW_AT_HP_all_variables_modifiable";
12408 case DW_AT_HP_linkage_name
:
12409 return "DW_AT_HP_linkage_name";
12410 case DW_AT_HP_prof_flags
:
12411 return "DW_AT_HP_prof_flags";
12412 /* GNU extensions. */
12413 case DW_AT_sf_names
:
12414 return "DW_AT_sf_names";
12415 case DW_AT_src_info
:
12416 return "DW_AT_src_info";
12417 case DW_AT_mac_info
:
12418 return "DW_AT_mac_info";
12419 case DW_AT_src_coords
:
12420 return "DW_AT_src_coords";
12421 case DW_AT_body_begin
:
12422 return "DW_AT_body_begin";
12423 case DW_AT_body_end
:
12424 return "DW_AT_body_end";
12425 case DW_AT_GNU_vector
:
12426 return "DW_AT_GNU_vector";
12427 case DW_AT_GNU_odr_signature
:
12428 return "DW_AT_GNU_odr_signature";
12429 /* VMS extensions. */
12430 case DW_AT_VMS_rtnbeg_pd_address
:
12431 return "DW_AT_VMS_rtnbeg_pd_address";
12432 /* UPC extension. */
12433 case DW_AT_upc_threads_scaled
:
12434 return "DW_AT_upc_threads_scaled";
12435 /* PGI (STMicroelectronics) extensions. */
12436 case DW_AT_PGI_lbase
:
12437 return "DW_AT_PGI_lbase";
12438 case DW_AT_PGI_soffset
:
12439 return "DW_AT_PGI_soffset";
12440 case DW_AT_PGI_lstride
:
12441 return "DW_AT_PGI_lstride";
12443 return "DW_AT_<unknown>";
12447 /* Convert a DWARF value form code into its string name. */
12450 dwarf_form_name (unsigned form
)
12455 return "DW_FORM_addr";
12456 case DW_FORM_block2
:
12457 return "DW_FORM_block2";
12458 case DW_FORM_block4
:
12459 return "DW_FORM_block4";
12460 case DW_FORM_data2
:
12461 return "DW_FORM_data2";
12462 case DW_FORM_data4
:
12463 return "DW_FORM_data4";
12464 case DW_FORM_data8
:
12465 return "DW_FORM_data8";
12466 case DW_FORM_string
:
12467 return "DW_FORM_string";
12468 case DW_FORM_block
:
12469 return "DW_FORM_block";
12470 case DW_FORM_block1
:
12471 return "DW_FORM_block1";
12472 case DW_FORM_data1
:
12473 return "DW_FORM_data1";
12475 return "DW_FORM_flag";
12476 case DW_FORM_sdata
:
12477 return "DW_FORM_sdata";
12479 return "DW_FORM_strp";
12480 case DW_FORM_udata
:
12481 return "DW_FORM_udata";
12482 case DW_FORM_ref_addr
:
12483 return "DW_FORM_ref_addr";
12485 return "DW_FORM_ref1";
12487 return "DW_FORM_ref2";
12489 return "DW_FORM_ref4";
12491 return "DW_FORM_ref8";
12492 case DW_FORM_ref_udata
:
12493 return "DW_FORM_ref_udata";
12494 case DW_FORM_indirect
:
12495 return "DW_FORM_indirect";
12496 case DW_FORM_sec_offset
:
12497 return "DW_FORM_sec_offset";
12498 case DW_FORM_exprloc
:
12499 return "DW_FORM_exprloc";
12500 case DW_FORM_flag_present
:
12501 return "DW_FORM_flag_present";
12503 return "DW_FORM_sig8";
12505 return "DW_FORM_<unknown>";
12509 /* Convert a DWARF stack opcode into its string name. */
12512 dwarf_stack_op_name (unsigned op
)
12517 return "DW_OP_addr";
12519 return "DW_OP_deref";
12520 case DW_OP_const1u
:
12521 return "DW_OP_const1u";
12522 case DW_OP_const1s
:
12523 return "DW_OP_const1s";
12524 case DW_OP_const2u
:
12525 return "DW_OP_const2u";
12526 case DW_OP_const2s
:
12527 return "DW_OP_const2s";
12528 case DW_OP_const4u
:
12529 return "DW_OP_const4u";
12530 case DW_OP_const4s
:
12531 return "DW_OP_const4s";
12532 case DW_OP_const8u
:
12533 return "DW_OP_const8u";
12534 case DW_OP_const8s
:
12535 return "DW_OP_const8s";
12537 return "DW_OP_constu";
12539 return "DW_OP_consts";
12541 return "DW_OP_dup";
12543 return "DW_OP_drop";
12545 return "DW_OP_over";
12547 return "DW_OP_pick";
12549 return "DW_OP_swap";
12551 return "DW_OP_rot";
12553 return "DW_OP_xderef";
12555 return "DW_OP_abs";
12557 return "DW_OP_and";
12559 return "DW_OP_div";
12561 return "DW_OP_minus";
12563 return "DW_OP_mod";
12565 return "DW_OP_mul";
12567 return "DW_OP_neg";
12569 return "DW_OP_not";
12573 return "DW_OP_plus";
12574 case DW_OP_plus_uconst
:
12575 return "DW_OP_plus_uconst";
12577 return "DW_OP_shl";
12579 return "DW_OP_shr";
12581 return "DW_OP_shra";
12583 return "DW_OP_xor";
12585 return "DW_OP_bra";
12599 return "DW_OP_skip";
12601 return "DW_OP_lit0";
12603 return "DW_OP_lit1";
12605 return "DW_OP_lit2";
12607 return "DW_OP_lit3";
12609 return "DW_OP_lit4";
12611 return "DW_OP_lit5";
12613 return "DW_OP_lit6";
12615 return "DW_OP_lit7";
12617 return "DW_OP_lit8";
12619 return "DW_OP_lit9";
12621 return "DW_OP_lit10";
12623 return "DW_OP_lit11";
12625 return "DW_OP_lit12";
12627 return "DW_OP_lit13";
12629 return "DW_OP_lit14";
12631 return "DW_OP_lit15";
12633 return "DW_OP_lit16";
12635 return "DW_OP_lit17";
12637 return "DW_OP_lit18";
12639 return "DW_OP_lit19";
12641 return "DW_OP_lit20";
12643 return "DW_OP_lit21";
12645 return "DW_OP_lit22";
12647 return "DW_OP_lit23";
12649 return "DW_OP_lit24";
12651 return "DW_OP_lit25";
12653 return "DW_OP_lit26";
12655 return "DW_OP_lit27";
12657 return "DW_OP_lit28";
12659 return "DW_OP_lit29";
12661 return "DW_OP_lit30";
12663 return "DW_OP_lit31";
12665 return "DW_OP_reg0";
12667 return "DW_OP_reg1";
12669 return "DW_OP_reg2";
12671 return "DW_OP_reg3";
12673 return "DW_OP_reg4";
12675 return "DW_OP_reg5";
12677 return "DW_OP_reg6";
12679 return "DW_OP_reg7";
12681 return "DW_OP_reg8";
12683 return "DW_OP_reg9";
12685 return "DW_OP_reg10";
12687 return "DW_OP_reg11";
12689 return "DW_OP_reg12";
12691 return "DW_OP_reg13";
12693 return "DW_OP_reg14";
12695 return "DW_OP_reg15";
12697 return "DW_OP_reg16";
12699 return "DW_OP_reg17";
12701 return "DW_OP_reg18";
12703 return "DW_OP_reg19";
12705 return "DW_OP_reg20";
12707 return "DW_OP_reg21";
12709 return "DW_OP_reg22";
12711 return "DW_OP_reg23";
12713 return "DW_OP_reg24";
12715 return "DW_OP_reg25";
12717 return "DW_OP_reg26";
12719 return "DW_OP_reg27";
12721 return "DW_OP_reg28";
12723 return "DW_OP_reg29";
12725 return "DW_OP_reg30";
12727 return "DW_OP_reg31";
12729 return "DW_OP_breg0";
12731 return "DW_OP_breg1";
12733 return "DW_OP_breg2";
12735 return "DW_OP_breg3";
12737 return "DW_OP_breg4";
12739 return "DW_OP_breg5";
12741 return "DW_OP_breg6";
12743 return "DW_OP_breg7";
12745 return "DW_OP_breg8";
12747 return "DW_OP_breg9";
12749 return "DW_OP_breg10";
12751 return "DW_OP_breg11";
12753 return "DW_OP_breg12";
12755 return "DW_OP_breg13";
12757 return "DW_OP_breg14";
12759 return "DW_OP_breg15";
12761 return "DW_OP_breg16";
12763 return "DW_OP_breg17";
12765 return "DW_OP_breg18";
12767 return "DW_OP_breg19";
12769 return "DW_OP_breg20";
12771 return "DW_OP_breg21";
12773 return "DW_OP_breg22";
12775 return "DW_OP_breg23";
12777 return "DW_OP_breg24";
12779 return "DW_OP_breg25";
12781 return "DW_OP_breg26";
12783 return "DW_OP_breg27";
12785 return "DW_OP_breg28";
12787 return "DW_OP_breg29";
12789 return "DW_OP_breg30";
12791 return "DW_OP_breg31";
12793 return "DW_OP_regx";
12795 return "DW_OP_fbreg";
12797 return "DW_OP_bregx";
12799 return "DW_OP_piece";
12800 case DW_OP_deref_size
:
12801 return "DW_OP_deref_size";
12802 case DW_OP_xderef_size
:
12803 return "DW_OP_xderef_size";
12805 return "DW_OP_nop";
12806 /* DWARF 3 extensions. */
12807 case DW_OP_push_object_address
:
12808 return "DW_OP_push_object_address";
12810 return "DW_OP_call2";
12812 return "DW_OP_call4";
12813 case DW_OP_call_ref
:
12814 return "DW_OP_call_ref";
12815 case DW_OP_form_tls_address
:
12816 return "DW_OP_form_tls_address";
12817 case DW_OP_call_frame_cfa
:
12818 return "DW_OP_call_frame_cfa";
12819 case DW_OP_bit_piece
:
12820 return "DW_OP_bit_piece";
12821 /* DWARF 4 extensions. */
12822 case DW_OP_implicit_value
:
12823 return "DW_OP_implicit_value";
12824 case DW_OP_stack_value
:
12825 return "DW_OP_stack_value";
12826 /* GNU extensions. */
12827 case DW_OP_GNU_push_tls_address
:
12828 return "DW_OP_GNU_push_tls_address";
12829 case DW_OP_GNU_uninit
:
12830 return "DW_OP_GNU_uninit";
12831 case DW_OP_GNU_implicit_pointer
:
12832 return "DW_OP_GNU_implicit_pointer";
12839 dwarf_bool_name (unsigned mybool
)
12847 /* Convert a DWARF type code into its string name. */
12850 dwarf_type_encoding_name (unsigned enc
)
12855 return "DW_ATE_void";
12856 case DW_ATE_address
:
12857 return "DW_ATE_address";
12858 case DW_ATE_boolean
:
12859 return "DW_ATE_boolean";
12860 case DW_ATE_complex_float
:
12861 return "DW_ATE_complex_float";
12863 return "DW_ATE_float";
12864 case DW_ATE_signed
:
12865 return "DW_ATE_signed";
12866 case DW_ATE_signed_char
:
12867 return "DW_ATE_signed_char";
12868 case DW_ATE_unsigned
:
12869 return "DW_ATE_unsigned";
12870 case DW_ATE_unsigned_char
:
12871 return "DW_ATE_unsigned_char";
12873 case DW_ATE_imaginary_float
:
12874 return "DW_ATE_imaginary_float";
12875 case DW_ATE_packed_decimal
:
12876 return "DW_ATE_packed_decimal";
12877 case DW_ATE_numeric_string
:
12878 return "DW_ATE_numeric_string";
12879 case DW_ATE_edited
:
12880 return "DW_ATE_edited";
12881 case DW_ATE_signed_fixed
:
12882 return "DW_ATE_signed_fixed";
12883 case DW_ATE_unsigned_fixed
:
12884 return "DW_ATE_unsigned_fixed";
12885 case DW_ATE_decimal_float
:
12886 return "DW_ATE_decimal_float";
12889 return "DW_ATE_UTF";
12890 /* HP extensions. */
12891 case DW_ATE_HP_float80
:
12892 return "DW_ATE_HP_float80";
12893 case DW_ATE_HP_complex_float80
:
12894 return "DW_ATE_HP_complex_float80";
12895 case DW_ATE_HP_float128
:
12896 return "DW_ATE_HP_float128";
12897 case DW_ATE_HP_complex_float128
:
12898 return "DW_ATE_HP_complex_float128";
12899 case DW_ATE_HP_floathpintel
:
12900 return "DW_ATE_HP_floathpintel";
12901 case DW_ATE_HP_imaginary_float80
:
12902 return "DW_ATE_HP_imaginary_float80";
12903 case DW_ATE_HP_imaginary_float128
:
12904 return "DW_ATE_HP_imaginary_float128";
12906 return "DW_ATE_<unknown>";
12910 /* Convert a DWARF call frame info operation to its string name. */
12914 dwarf_cfi_name (unsigned cfi_opc
)
12918 case DW_CFA_advance_loc
:
12919 return "DW_CFA_advance_loc";
12920 case DW_CFA_offset
:
12921 return "DW_CFA_offset";
12922 case DW_CFA_restore
:
12923 return "DW_CFA_restore";
12925 return "DW_CFA_nop";
12926 case DW_CFA_set_loc
:
12927 return "DW_CFA_set_loc";
12928 case DW_CFA_advance_loc1
:
12929 return "DW_CFA_advance_loc1";
12930 case DW_CFA_advance_loc2
:
12931 return "DW_CFA_advance_loc2";
12932 case DW_CFA_advance_loc4
:
12933 return "DW_CFA_advance_loc4";
12934 case DW_CFA_offset_extended
:
12935 return "DW_CFA_offset_extended";
12936 case DW_CFA_restore_extended
:
12937 return "DW_CFA_restore_extended";
12938 case DW_CFA_undefined
:
12939 return "DW_CFA_undefined";
12940 case DW_CFA_same_value
:
12941 return "DW_CFA_same_value";
12942 case DW_CFA_register
:
12943 return "DW_CFA_register";
12944 case DW_CFA_remember_state
:
12945 return "DW_CFA_remember_state";
12946 case DW_CFA_restore_state
:
12947 return "DW_CFA_restore_state";
12948 case DW_CFA_def_cfa
:
12949 return "DW_CFA_def_cfa";
12950 case DW_CFA_def_cfa_register
:
12951 return "DW_CFA_def_cfa_register";
12952 case DW_CFA_def_cfa_offset
:
12953 return "DW_CFA_def_cfa_offset";
12955 case DW_CFA_def_cfa_expression
:
12956 return "DW_CFA_def_cfa_expression";
12957 case DW_CFA_expression
:
12958 return "DW_CFA_expression";
12959 case DW_CFA_offset_extended_sf
:
12960 return "DW_CFA_offset_extended_sf";
12961 case DW_CFA_def_cfa_sf
:
12962 return "DW_CFA_def_cfa_sf";
12963 case DW_CFA_def_cfa_offset_sf
:
12964 return "DW_CFA_def_cfa_offset_sf";
12965 case DW_CFA_val_offset
:
12966 return "DW_CFA_val_offset";
12967 case DW_CFA_val_offset_sf
:
12968 return "DW_CFA_val_offset_sf";
12969 case DW_CFA_val_expression
:
12970 return "DW_CFA_val_expression";
12971 /* SGI/MIPS specific. */
12972 case DW_CFA_MIPS_advance_loc8
:
12973 return "DW_CFA_MIPS_advance_loc8";
12974 /* GNU extensions. */
12975 case DW_CFA_GNU_window_save
:
12976 return "DW_CFA_GNU_window_save";
12977 case DW_CFA_GNU_args_size
:
12978 return "DW_CFA_GNU_args_size";
12979 case DW_CFA_GNU_negative_offset_extended
:
12980 return "DW_CFA_GNU_negative_offset_extended";
12982 return "DW_CFA_<unknown>";
12988 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12992 print_spaces (indent
, f
);
12993 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12994 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12996 if (die
->parent
!= NULL
)
12998 print_spaces (indent
, f
);
12999 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
13000 die
->parent
->offset
);
13003 print_spaces (indent
, f
);
13004 fprintf_unfiltered (f
, " has children: %s\n",
13005 dwarf_bool_name (die
->child
!= NULL
));
13007 print_spaces (indent
, f
);
13008 fprintf_unfiltered (f
, " attributes:\n");
13010 for (i
= 0; i
< die
->num_attrs
; ++i
)
13012 print_spaces (indent
, f
);
13013 fprintf_unfiltered (f
, " %s (%s) ",
13014 dwarf_attr_name (die
->attrs
[i
].name
),
13015 dwarf_form_name (die
->attrs
[i
].form
));
13017 switch (die
->attrs
[i
].form
)
13019 case DW_FORM_ref_addr
:
13021 fprintf_unfiltered (f
, "address: ");
13022 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
13024 case DW_FORM_block2
:
13025 case DW_FORM_block4
:
13026 case DW_FORM_block
:
13027 case DW_FORM_block1
:
13028 fprintf_unfiltered (f
, "block: size %d",
13029 DW_BLOCK (&die
->attrs
[i
])->size
);
13031 case DW_FORM_exprloc
:
13032 fprintf_unfiltered (f
, "expression: size %u",
13033 DW_BLOCK (&die
->attrs
[i
])->size
);
13038 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
13039 (long) (DW_ADDR (&die
->attrs
[i
])));
13041 case DW_FORM_data1
:
13042 case DW_FORM_data2
:
13043 case DW_FORM_data4
:
13044 case DW_FORM_data8
:
13045 case DW_FORM_udata
:
13046 case DW_FORM_sdata
:
13047 fprintf_unfiltered (f
, "constant: %s",
13048 pulongest (DW_UNSND (&die
->attrs
[i
])));
13050 case DW_FORM_sec_offset
:
13051 fprintf_unfiltered (f
, "section offset: %s",
13052 pulongest (DW_UNSND (&die
->attrs
[i
])));
13055 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
13056 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
13057 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
13059 fprintf_unfiltered (f
, "signatured type, offset: unknown");
13061 case DW_FORM_string
:
13063 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
13064 DW_STRING (&die
->attrs
[i
])
13065 ? DW_STRING (&die
->attrs
[i
]) : "",
13066 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
13069 if (DW_UNSND (&die
->attrs
[i
]))
13070 fprintf_unfiltered (f
, "flag: TRUE");
13072 fprintf_unfiltered (f
, "flag: FALSE");
13074 case DW_FORM_flag_present
:
13075 fprintf_unfiltered (f
, "flag: TRUE");
13077 case DW_FORM_indirect
:
13078 /* The reader will have reduced the indirect form to
13079 the "base form" so this form should not occur. */
13080 fprintf_unfiltered (f
,
13081 "unexpected attribute form: DW_FORM_indirect");
13084 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
13085 die
->attrs
[i
].form
);
13088 fprintf_unfiltered (f
, "\n");
13093 dump_die_for_error (struct die_info
*die
)
13095 dump_die_shallow (gdb_stderr
, 0, die
);
13099 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
13101 int indent
= level
* 4;
13103 gdb_assert (die
!= NULL
);
13105 if (level
>= max_level
)
13108 dump_die_shallow (f
, indent
, die
);
13110 if (die
->child
!= NULL
)
13112 print_spaces (indent
, f
);
13113 fprintf_unfiltered (f
, " Children:");
13114 if (level
+ 1 < max_level
)
13116 fprintf_unfiltered (f
, "\n");
13117 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
13121 fprintf_unfiltered (f
,
13122 " [not printed, max nesting level reached]\n");
13126 if (die
->sibling
!= NULL
&& level
> 0)
13128 dump_die_1 (f
, level
, max_level
, die
->sibling
);
13132 /* This is called from the pdie macro in gdbinit.in.
13133 It's not static so gcc will keep a copy callable from gdb. */
13136 dump_die (struct die_info
*die
, int max_level
)
13138 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
13142 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
13146 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
13152 is_ref_attr (struct attribute
*attr
)
13154 switch (attr
->form
)
13156 case DW_FORM_ref_addr
:
13161 case DW_FORM_ref_udata
:
13168 static unsigned int
13169 dwarf2_get_ref_die_offset (struct attribute
*attr
)
13171 if (is_ref_attr (attr
))
13172 return DW_ADDR (attr
);
13174 complaint (&symfile_complaints
,
13175 _("unsupported die ref attribute form: '%s'"),
13176 dwarf_form_name (attr
->form
));
13180 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
13181 * the value held by the attribute is not constant. */
13184 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
13186 if (attr
->form
== DW_FORM_sdata
)
13187 return DW_SND (attr
);
13188 else if (attr
->form
== DW_FORM_udata
13189 || attr
->form
== DW_FORM_data1
13190 || attr
->form
== DW_FORM_data2
13191 || attr
->form
== DW_FORM_data4
13192 || attr
->form
== DW_FORM_data8
)
13193 return DW_UNSND (attr
);
13196 complaint (&symfile_complaints
,
13197 _("Attribute value is not a constant (%s)"),
13198 dwarf_form_name (attr
->form
));
13199 return default_value
;
13203 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
13204 unit and add it to our queue.
13205 The result is non-zero if PER_CU was queued, otherwise the result is zero
13206 meaning either PER_CU is already queued or it is already loaded. */
13209 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
13210 struct dwarf2_per_cu_data
*per_cu
)
13212 /* We may arrive here during partial symbol reading, if we need full
13213 DIEs to process an unusual case (e.g. template arguments). Do
13214 not queue PER_CU, just tell our caller to load its DIEs. */
13215 if (dwarf2_per_objfile
->reading_partial_symbols
)
13217 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
13222 /* Mark the dependence relation so that we don't flush PER_CU
13224 dwarf2_add_dependence (this_cu
, per_cu
);
13226 /* If it's already on the queue, we have nothing to do. */
13227 if (per_cu
->queued
)
13230 /* If the compilation unit is already loaded, just mark it as
13232 if (per_cu
->cu
!= NULL
)
13234 per_cu
->cu
->last_used
= 0;
13238 /* Add it to the queue. */
13239 queue_comp_unit (per_cu
, this_cu
->objfile
);
13244 /* Follow reference or signature attribute ATTR of SRC_DIE.
13245 On entry *REF_CU is the CU of SRC_DIE.
13246 On exit *REF_CU is the CU of the result. */
13248 static struct die_info
*
13249 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
13250 struct dwarf2_cu
**ref_cu
)
13252 struct die_info
*die
;
13254 if (is_ref_attr (attr
))
13255 die
= follow_die_ref (src_die
, attr
, ref_cu
);
13256 else if (attr
->form
== DW_FORM_sig8
)
13257 die
= follow_die_sig (src_die
, attr
, ref_cu
);
13260 dump_die_for_error (src_die
);
13261 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
13262 (*ref_cu
)->objfile
->name
);
13268 /* Follow reference OFFSET.
13269 On entry *REF_CU is the CU of the source die referencing OFFSET.
13270 On exit *REF_CU is the CU of the result.
13271 Returns NULL if OFFSET is invalid. */
13273 static struct die_info
*
13274 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
13276 struct die_info temp_die
;
13277 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
13279 gdb_assert (cu
->per_cu
!= NULL
);
13283 if (cu
->per_cu
->from_debug_types
)
13285 /* .debug_types CUs cannot reference anything outside their CU.
13286 If they need to, they have to reference a signatured type via
13288 if (! offset_in_cu_p (&cu
->header
, offset
))
13291 else if (! offset_in_cu_p (&cu
->header
, offset
))
13293 struct dwarf2_per_cu_data
*per_cu
;
13295 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
13297 /* If necessary, add it to the queue and load its DIEs. */
13298 if (maybe_queue_comp_unit (cu
, per_cu
))
13299 load_full_comp_unit (per_cu
, cu
->objfile
);
13301 target_cu
= per_cu
->cu
;
13303 else if (cu
->dies
== NULL
)
13305 /* We're loading full DIEs during partial symbol reading. */
13306 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
13307 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
13310 *ref_cu
= target_cu
;
13311 temp_die
.offset
= offset
;
13312 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
13315 /* Follow reference attribute ATTR of SRC_DIE.
13316 On entry *REF_CU is the CU of SRC_DIE.
13317 On exit *REF_CU is the CU of the result. */
13319 static struct die_info
*
13320 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
13321 struct dwarf2_cu
**ref_cu
)
13323 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
13324 struct dwarf2_cu
*cu
= *ref_cu
;
13325 struct die_info
*die
;
13327 die
= follow_die_offset (offset
, ref_cu
);
13329 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
13330 "at 0x%x [in module %s]"),
13331 offset
, src_die
->offset
, cu
->objfile
->name
);
13336 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
13337 value is intended for DW_OP_call*. */
13339 struct dwarf2_locexpr_baton
13340 dwarf2_fetch_die_location_block (unsigned int offset
,
13341 struct dwarf2_per_cu_data
*per_cu
,
13342 CORE_ADDR (*get_frame_pc
) (void *baton
),
13345 struct dwarf2_cu
*cu
= per_cu
->cu
;
13346 struct die_info
*die
;
13347 struct attribute
*attr
;
13348 struct dwarf2_locexpr_baton retval
;
13350 dw2_setup (per_cu
->objfile
);
13352 die
= follow_die_offset (offset
, &cu
);
13354 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
13355 offset
, per_cu
->cu
->objfile
->name
);
13357 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13360 /* DWARF: "If there is no such attribute, then there is no effect.". */
13362 retval
.data
= NULL
;
13365 else if (attr_form_is_section_offset (attr
))
13367 struct dwarf2_loclist_baton loclist_baton
;
13368 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
13371 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
13373 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
13375 retval
.size
= size
;
13379 if (!attr_form_is_block (attr
))
13380 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
13381 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
13382 offset
, per_cu
->cu
->objfile
->name
);
13384 retval
.data
= DW_BLOCK (attr
)->data
;
13385 retval
.size
= DW_BLOCK (attr
)->size
;
13387 retval
.per_cu
= cu
->per_cu
;
13391 /* Follow the signature attribute ATTR in SRC_DIE.
13392 On entry *REF_CU is the CU of SRC_DIE.
13393 On exit *REF_CU is the CU of the result. */
13395 static struct die_info
*
13396 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
13397 struct dwarf2_cu
**ref_cu
)
13399 struct objfile
*objfile
= (*ref_cu
)->objfile
;
13400 struct die_info temp_die
;
13401 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
13402 struct dwarf2_cu
*sig_cu
;
13403 struct die_info
*die
;
13405 /* sig_type will be NULL if the signatured type is missing from
13407 if (sig_type
== NULL
)
13408 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
13409 "at 0x%x [in module %s]"),
13410 src_die
->offset
, objfile
->name
);
13412 /* If necessary, add it to the queue and load its DIEs. */
13414 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
13415 read_signatured_type (objfile
, sig_type
);
13417 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
13419 sig_cu
= sig_type
->per_cu
.cu
;
13420 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
13421 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
13428 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
13429 "from DIE at 0x%x [in module %s]"),
13430 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
13433 /* Given an offset of a signatured type, return its signatured_type. */
13435 static struct signatured_type
*
13436 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
13438 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
13439 unsigned int length
, initial_length_size
;
13440 unsigned int sig_offset
;
13441 struct signatured_type find_entry
, *type_sig
;
13443 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
13444 sig_offset
= (initial_length_size
13446 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
13447 + 1 /*address_size*/);
13448 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
13449 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
13451 /* This is only used to lookup previously recorded types.
13452 If we didn't find it, it's our bug. */
13453 gdb_assert (type_sig
!= NULL
);
13454 gdb_assert (offset
== type_sig
->offset
);
13459 /* Read in signatured type at OFFSET and build its CU and die(s). */
13462 read_signatured_type_at_offset (struct objfile
*objfile
,
13463 unsigned int offset
)
13465 struct signatured_type
*type_sig
;
13467 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13469 /* We have the section offset, but we need the signature to do the
13470 hash table lookup. */
13471 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13473 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13475 read_signatured_type (objfile
, type_sig
);
13477 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13480 /* Read in a signatured type and build its CU and DIEs. */
13483 read_signatured_type (struct objfile
*objfile
,
13484 struct signatured_type
*type_sig
)
13486 gdb_byte
*types_ptr
;
13487 struct die_reader_specs reader_specs
;
13488 struct dwarf2_cu
*cu
;
13489 ULONGEST signature
;
13490 struct cleanup
*back_to
, *free_cu_cleanup
;
13492 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13493 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13495 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13497 cu
= xmalloc (sizeof (*cu
));
13498 init_one_comp_unit (cu
, objfile
);
13500 type_sig
->per_cu
.cu
= cu
;
13501 cu
->per_cu
= &type_sig
->per_cu
;
13503 /* If an error occurs while loading, release our storage. */
13504 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13506 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13507 types_ptr
, objfile
->obfd
);
13508 gdb_assert (signature
== type_sig
->signature
);
13511 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13515 &cu
->comp_unit_obstack
,
13516 hashtab_obstack_allocate
,
13517 dummy_obstack_deallocate
);
13519 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13520 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13522 init_cu_die_reader (&reader_specs
, cu
);
13524 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13527 /* We try not to read any attributes in this function, because not
13528 all objfiles needed for references have been loaded yet, and symbol
13529 table processing isn't initialized. But we have to set the CU language,
13530 or we won't be able to build types correctly. */
13531 prepare_one_comp_unit (cu
, cu
->dies
);
13533 do_cleanups (back_to
);
13535 /* We've successfully allocated this compilation unit. Let our caller
13536 clean it up when finished with it. */
13537 discard_cleanups (free_cu_cleanup
);
13539 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13540 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13543 /* Decode simple location descriptions.
13544 Given a pointer to a dwarf block that defines a location, compute
13545 the location and return the value.
13547 NOTE drow/2003-11-18: This function is called in two situations
13548 now: for the address of static or global variables (partial symbols
13549 only) and for offsets into structures which are expected to be
13550 (more or less) constant. The partial symbol case should go away,
13551 and only the constant case should remain. That will let this
13552 function complain more accurately. A few special modes are allowed
13553 without complaint for global variables (for instance, global
13554 register values and thread-local values).
13556 A location description containing no operations indicates that the
13557 object is optimized out. The return value is 0 for that case.
13558 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13559 callers will only want a very basic result and this can become a
13562 Note that stack[0] is unused except as a default error return. */
13565 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13567 struct objfile
*objfile
= cu
->objfile
;
13569 int size
= blk
->size
;
13570 gdb_byte
*data
= blk
->data
;
13571 CORE_ADDR stack
[64];
13573 unsigned int bytes_read
, unsnd
;
13579 stack
[++stacki
] = 0;
13618 stack
[++stacki
] = op
- DW_OP_lit0
;
13653 stack
[++stacki
] = op
- DW_OP_reg0
;
13655 dwarf2_complex_location_expr_complaint ();
13659 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13661 stack
[++stacki
] = unsnd
;
13663 dwarf2_complex_location_expr_complaint ();
13667 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13672 case DW_OP_const1u
:
13673 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13677 case DW_OP_const1s
:
13678 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13682 case DW_OP_const2u
:
13683 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13687 case DW_OP_const2s
:
13688 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13692 case DW_OP_const4u
:
13693 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13697 case DW_OP_const4s
:
13698 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13703 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13709 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13714 stack
[stacki
+ 1] = stack
[stacki
];
13719 stack
[stacki
- 1] += stack
[stacki
];
13723 case DW_OP_plus_uconst
:
13724 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
13730 stack
[stacki
- 1] -= stack
[stacki
];
13735 /* If we're not the last op, then we definitely can't encode
13736 this using GDB's address_class enum. This is valid for partial
13737 global symbols, although the variable's address will be bogus
13740 dwarf2_complex_location_expr_complaint ();
13743 case DW_OP_GNU_push_tls_address
:
13744 /* The top of the stack has the offset from the beginning
13745 of the thread control block at which the variable is located. */
13746 /* Nothing should follow this operator, so the top of stack would
13748 /* This is valid for partial global symbols, but the variable's
13749 address will be bogus in the psymtab. */
13751 dwarf2_complex_location_expr_complaint ();
13754 case DW_OP_GNU_uninit
:
13759 const char *name
= dwarf_stack_op_name (op
);
13762 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13765 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
13769 return (stack
[stacki
]);
13772 /* Enforce maximum stack depth of SIZE-1 to avoid writing
13773 outside of the allocated space. Also enforce minimum>0. */
13774 if (stacki
>= ARRAY_SIZE (stack
) - 1)
13776 complaint (&symfile_complaints
,
13777 _("location description stack overflow"));
13783 complaint (&symfile_complaints
,
13784 _("location description stack underflow"));
13788 return (stack
[stacki
]);
13791 /* memory allocation interface */
13793 static struct dwarf_block
*
13794 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13796 struct dwarf_block
*blk
;
13798 blk
= (struct dwarf_block
*)
13799 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13803 static struct abbrev_info
*
13804 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13806 struct abbrev_info
*abbrev
;
13808 abbrev
= (struct abbrev_info
*)
13809 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13810 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13814 static struct die_info
*
13815 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13817 struct die_info
*die
;
13818 size_t size
= sizeof (struct die_info
);
13821 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13823 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13824 memset (die
, 0, sizeof (struct die_info
));
13829 /* Macro support. */
13831 /* Return the full name of file number I in *LH's file name table.
13832 Use COMP_DIR as the name of the current directory of the
13833 compilation. The result is allocated using xmalloc; the caller is
13834 responsible for freeing it. */
13836 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13838 /* Is the file number a valid index into the line header's file name
13839 table? Remember that file numbers start with one, not zero. */
13840 if (1 <= file
&& file
<= lh
->num_file_names
)
13842 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13844 if (IS_ABSOLUTE_PATH (fe
->name
))
13845 return xstrdup (fe
->name
);
13853 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13859 dir_len
= strlen (dir
);
13860 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13861 strcpy (full_name
, dir
);
13862 full_name
[dir_len
] = '/';
13863 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13867 return xstrdup (fe
->name
);
13872 /* The compiler produced a bogus file number. We can at least
13873 record the macro definitions made in the file, even if we
13874 won't be able to find the file by name. */
13875 char fake_name
[80];
13877 sprintf (fake_name
, "<bad macro file number %d>", file
);
13879 complaint (&symfile_complaints
,
13880 _("bad file number in macro information (%d)"),
13883 return xstrdup (fake_name
);
13888 static struct macro_source_file
*
13889 macro_start_file (int file
, int line
,
13890 struct macro_source_file
*current_file
,
13891 const char *comp_dir
,
13892 struct line_header
*lh
, struct objfile
*objfile
)
13894 /* The full name of this source file. */
13895 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13897 /* We don't create a macro table for this compilation unit
13898 at all until we actually get a filename. */
13899 if (! pending_macros
)
13900 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13901 objfile
->macro_cache
);
13903 if (! current_file
)
13904 /* If we have no current file, then this must be the start_file
13905 directive for the compilation unit's main source file. */
13906 current_file
= macro_set_main (pending_macros
, full_name
);
13908 current_file
= macro_include (current_file
, line
, full_name
);
13912 return current_file
;
13916 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13917 followed by a null byte. */
13919 copy_string (const char *buf
, int len
)
13921 char *s
= xmalloc (len
+ 1);
13923 memcpy (s
, buf
, len
);
13929 static const char *
13930 consume_improper_spaces (const char *p
, const char *body
)
13934 complaint (&symfile_complaints
,
13935 _("macro definition contains spaces "
13936 "in formal argument list:\n`%s'"),
13948 parse_macro_definition (struct macro_source_file
*file
, int line
,
13953 /* The body string takes one of two forms. For object-like macro
13954 definitions, it should be:
13956 <macro name> " " <definition>
13958 For function-like macro definitions, it should be:
13960 <macro name> "() " <definition>
13962 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13964 Spaces may appear only where explicitly indicated, and in the
13967 The Dwarf 2 spec says that an object-like macro's name is always
13968 followed by a space, but versions of GCC around March 2002 omit
13969 the space when the macro's definition is the empty string.
13971 The Dwarf 2 spec says that there should be no spaces between the
13972 formal arguments in a function-like macro's formal argument list,
13973 but versions of GCC around March 2002 include spaces after the
13977 /* Find the extent of the macro name. The macro name is terminated
13978 by either a space or null character (for an object-like macro) or
13979 an opening paren (for a function-like macro). */
13980 for (p
= body
; *p
; p
++)
13981 if (*p
== ' ' || *p
== '(')
13984 if (*p
== ' ' || *p
== '\0')
13986 /* It's an object-like macro. */
13987 int name_len
= p
- body
;
13988 char *name
= copy_string (body
, name_len
);
13989 const char *replacement
;
13992 replacement
= body
+ name_len
+ 1;
13995 dwarf2_macro_malformed_definition_complaint (body
);
13996 replacement
= body
+ name_len
;
13999 macro_define_object (file
, line
, name
, replacement
);
14003 else if (*p
== '(')
14005 /* It's a function-like macro. */
14006 char *name
= copy_string (body
, p
- body
);
14009 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
14013 p
= consume_improper_spaces (p
, body
);
14015 /* Parse the formal argument list. */
14016 while (*p
&& *p
!= ')')
14018 /* Find the extent of the current argument name. */
14019 const char *arg_start
= p
;
14021 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
14024 if (! *p
|| p
== arg_start
)
14025 dwarf2_macro_malformed_definition_complaint (body
);
14028 /* Make sure argv has room for the new argument. */
14029 if (argc
>= argv_size
)
14032 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
14035 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
14038 p
= consume_improper_spaces (p
, body
);
14040 /* Consume the comma, if present. */
14045 p
= consume_improper_spaces (p
, body
);
14054 /* Perfectly formed definition, no complaints. */
14055 macro_define_function (file
, line
, name
,
14056 argc
, (const char **) argv
,
14058 else if (*p
== '\0')
14060 /* Complain, but do define it. */
14061 dwarf2_macro_malformed_definition_complaint (body
);
14062 macro_define_function (file
, line
, name
,
14063 argc
, (const char **) argv
,
14067 /* Just complain. */
14068 dwarf2_macro_malformed_definition_complaint (body
);
14071 /* Just complain. */
14072 dwarf2_macro_malformed_definition_complaint (body
);
14078 for (i
= 0; i
< argc
; i
++)
14084 dwarf2_macro_malformed_definition_complaint (body
);
14089 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
14090 char *comp_dir
, bfd
*abfd
,
14091 struct dwarf2_cu
*cu
)
14093 gdb_byte
*mac_ptr
, *mac_end
;
14094 struct macro_source_file
*current_file
= 0;
14095 enum dwarf_macinfo_record_type macinfo_type
;
14096 int at_commandline
;
14098 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14099 &dwarf2_per_objfile
->macinfo
);
14100 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
14102 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
14106 /* First pass: Find the name of the base filename.
14107 This filename is needed in order to process all macros whose definition
14108 (or undefinition) comes from the command line. These macros are defined
14109 before the first DW_MACINFO_start_file entry, and yet still need to be
14110 associated to the base file.
14112 To determine the base file name, we scan the macro definitions until we
14113 reach the first DW_MACINFO_start_file entry. We then initialize
14114 CURRENT_FILE accordingly so that any macro definition found before the
14115 first DW_MACINFO_start_file can still be associated to the base file. */
14117 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14118 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
14119 + dwarf2_per_objfile
->macinfo
.size
;
14123 /* Do we at least have room for a macinfo type byte? */
14124 if (mac_ptr
>= mac_end
)
14126 /* Complaint is printed during the second pass as GDB will probably
14127 stop the first pass earlier upon finding
14128 DW_MACINFO_start_file. */
14132 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14135 switch (macinfo_type
)
14137 /* A zero macinfo type indicates the end of the macro
14142 case DW_MACINFO_define
:
14143 case DW_MACINFO_undef
:
14144 /* Only skip the data by MAC_PTR. */
14146 unsigned int bytes_read
;
14148 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14149 mac_ptr
+= bytes_read
;
14150 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14151 mac_ptr
+= bytes_read
;
14155 case DW_MACINFO_start_file
:
14157 unsigned int bytes_read
;
14160 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14161 mac_ptr
+= bytes_read
;
14162 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14163 mac_ptr
+= bytes_read
;
14165 current_file
= macro_start_file (file
, line
, current_file
,
14166 comp_dir
, lh
, cu
->objfile
);
14170 case DW_MACINFO_end_file
:
14171 /* No data to skip by MAC_PTR. */
14174 case DW_MACINFO_vendor_ext
:
14175 /* Only skip the data by MAC_PTR. */
14177 unsigned int bytes_read
;
14179 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14180 mac_ptr
+= bytes_read
;
14181 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14182 mac_ptr
+= bytes_read
;
14189 } while (macinfo_type
!= 0 && current_file
== NULL
);
14191 /* Second pass: Process all entries.
14193 Use the AT_COMMAND_LINE flag to determine whether we are still processing
14194 command-line macro definitions/undefinitions. This flag is unset when we
14195 reach the first DW_MACINFO_start_file entry. */
14197 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
14199 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
14200 GDB is still reading the definitions from command line. First
14201 DW_MACINFO_start_file will need to be ignored as it was already executed
14202 to create CURRENT_FILE for the main source holding also the command line
14203 definitions. On first met DW_MACINFO_start_file this flag is reset to
14204 normally execute all the remaining DW_MACINFO_start_file macinfos. */
14206 at_commandline
= 1;
14210 /* Do we at least have room for a macinfo type byte? */
14211 if (mac_ptr
>= mac_end
)
14213 dwarf2_macros_too_long_complaint ();
14217 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
14220 switch (macinfo_type
)
14222 /* A zero macinfo type indicates the end of the macro
14227 case DW_MACINFO_define
:
14228 case DW_MACINFO_undef
:
14230 unsigned int bytes_read
;
14234 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14235 mac_ptr
+= bytes_read
;
14236 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14237 mac_ptr
+= bytes_read
;
14239 if (! current_file
)
14241 /* DWARF violation as no main source is present. */
14242 complaint (&symfile_complaints
,
14243 _("debug info with no main source gives macro %s "
14245 macinfo_type
== DW_MACINFO_define
?
14247 macinfo_type
== DW_MACINFO_undef
?
14248 _("undefinition") :
14249 _("something-or-other"), line
, body
);
14252 if ((line
== 0 && !at_commandline
)
14253 || (line
!= 0 && at_commandline
))
14254 complaint (&symfile_complaints
,
14255 _("debug info gives %s macro %s with %s line %d: %s"),
14256 at_commandline
? _("command-line") : _("in-file"),
14257 macinfo_type
== DW_MACINFO_define
?
14259 macinfo_type
== DW_MACINFO_undef
?
14260 _("undefinition") :
14261 _("something-or-other"),
14262 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
14264 if (macinfo_type
== DW_MACINFO_define
)
14265 parse_macro_definition (current_file
, line
, body
);
14266 else if (macinfo_type
== DW_MACINFO_undef
)
14267 macro_undef (current_file
, line
, body
);
14271 case DW_MACINFO_start_file
:
14273 unsigned int bytes_read
;
14276 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14277 mac_ptr
+= bytes_read
;
14278 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14279 mac_ptr
+= bytes_read
;
14281 if ((line
== 0 && !at_commandline
)
14282 || (line
!= 0 && at_commandline
))
14283 complaint (&symfile_complaints
,
14284 _("debug info gives source %d included "
14285 "from %s at %s line %d"),
14286 file
, at_commandline
? _("command-line") : _("file"),
14287 line
== 0 ? _("zero") : _("non-zero"), line
);
14289 if (at_commandline
)
14291 /* This DW_MACINFO_start_file was executed in the pass one. */
14292 at_commandline
= 0;
14295 current_file
= macro_start_file (file
, line
,
14296 current_file
, comp_dir
,
14301 case DW_MACINFO_end_file
:
14302 if (! current_file
)
14303 complaint (&symfile_complaints
,
14304 _("macro debug info has an unmatched "
14305 "`close_file' directive"));
14308 current_file
= current_file
->included_by
;
14309 if (! current_file
)
14311 enum dwarf_macinfo_record_type next_type
;
14313 /* GCC circa March 2002 doesn't produce the zero
14314 type byte marking the end of the compilation
14315 unit. Complain if it's not there, but exit no
14318 /* Do we at least have room for a macinfo type byte? */
14319 if (mac_ptr
>= mac_end
)
14321 dwarf2_macros_too_long_complaint ();
14325 /* We don't increment mac_ptr here, so this is just
14327 next_type
= read_1_byte (abfd
, mac_ptr
);
14328 if (next_type
!= 0)
14329 complaint (&symfile_complaints
,
14330 _("no terminating 0-type entry for "
14331 "macros in `.debug_macinfo' section"));
14338 case DW_MACINFO_vendor_ext
:
14340 unsigned int bytes_read
;
14343 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
14344 mac_ptr
+= bytes_read
;
14345 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
14346 mac_ptr
+= bytes_read
;
14348 /* We don't recognize any vendor extensions. */
14352 } while (macinfo_type
!= 0);
14355 /* Check if the attribute's form is a DW_FORM_block*
14356 if so return true else false. */
14358 attr_form_is_block (struct attribute
*attr
)
14360 return (attr
== NULL
? 0 :
14361 attr
->form
== DW_FORM_block1
14362 || attr
->form
== DW_FORM_block2
14363 || attr
->form
== DW_FORM_block4
14364 || attr
->form
== DW_FORM_block
14365 || attr
->form
== DW_FORM_exprloc
);
14368 /* Return non-zero if ATTR's value is a section offset --- classes
14369 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
14370 You may use DW_UNSND (attr) to retrieve such offsets.
14372 Section 7.5.4, "Attribute Encodings", explains that no attribute
14373 may have a value that belongs to more than one of these classes; it
14374 would be ambiguous if we did, because we use the same forms for all
14377 attr_form_is_section_offset (struct attribute
*attr
)
14379 return (attr
->form
== DW_FORM_data4
14380 || attr
->form
== DW_FORM_data8
14381 || attr
->form
== DW_FORM_sec_offset
);
14385 /* Return non-zero if ATTR's value falls in the 'constant' class, or
14386 zero otherwise. When this function returns true, you can apply
14387 dwarf2_get_attr_constant_value to it.
14389 However, note that for some attributes you must check
14390 attr_form_is_section_offset before using this test. DW_FORM_data4
14391 and DW_FORM_data8 are members of both the constant class, and of
14392 the classes that contain offsets into other debug sections
14393 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
14394 that, if an attribute's can be either a constant or one of the
14395 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
14396 taken as section offsets, not constants. */
14398 attr_form_is_constant (struct attribute
*attr
)
14400 switch (attr
->form
)
14402 case DW_FORM_sdata
:
14403 case DW_FORM_udata
:
14404 case DW_FORM_data1
:
14405 case DW_FORM_data2
:
14406 case DW_FORM_data4
:
14407 case DW_FORM_data8
:
14414 /* A helper function that fills in a dwarf2_loclist_baton. */
14417 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
14418 struct dwarf2_loclist_baton
*baton
,
14419 struct attribute
*attr
)
14421 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
14422 &dwarf2_per_objfile
->loc
);
14424 baton
->per_cu
= cu
->per_cu
;
14425 gdb_assert (baton
->per_cu
);
14426 /* We don't know how long the location list is, but make sure we
14427 don't run off the edge of the section. */
14428 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
14429 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
14430 baton
->base_address
= cu
->base_address
;
14434 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
14435 struct dwarf2_cu
*cu
)
14437 if (attr_form_is_section_offset (attr
)
14438 /* ".debug_loc" may not exist at all, or the offset may be outside
14439 the section. If so, fall through to the complaint in the
14441 && DW_UNSND (attr
) < dwarf2_section_size (dwarf2_per_objfile
->objfile
,
14442 &dwarf2_per_objfile
->loc
))
14444 struct dwarf2_loclist_baton
*baton
;
14446 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14447 sizeof (struct dwarf2_loclist_baton
));
14449 fill_in_loclist_baton (cu
, baton
, attr
);
14451 if (cu
->base_known
== 0)
14452 complaint (&symfile_complaints
,
14453 _("Location list used without "
14454 "specifying the CU base address."));
14456 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
14457 SYMBOL_LOCATION_BATON (sym
) = baton
;
14461 struct dwarf2_locexpr_baton
*baton
;
14463 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
14464 sizeof (struct dwarf2_locexpr_baton
));
14465 baton
->per_cu
= cu
->per_cu
;
14466 gdb_assert (baton
->per_cu
);
14468 if (attr_form_is_block (attr
))
14470 /* Note that we're just copying the block's data pointer
14471 here, not the actual data. We're still pointing into the
14472 info_buffer for SYM's objfile; right now we never release
14473 that buffer, but when we do clean up properly this may
14475 baton
->size
= DW_BLOCK (attr
)->size
;
14476 baton
->data
= DW_BLOCK (attr
)->data
;
14480 dwarf2_invalid_attrib_class_complaint ("location description",
14481 SYMBOL_NATURAL_NAME (sym
));
14483 baton
->data
= NULL
;
14486 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14487 SYMBOL_LOCATION_BATON (sym
) = baton
;
14491 /* Return the OBJFILE associated with the compilation unit CU. If CU
14492 came from a separate debuginfo file, then the master objfile is
14496 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
14498 struct objfile
*objfile
= per_cu
->objfile
;
14500 /* Return the master objfile, so that we can report and look up the
14501 correct file containing this variable. */
14502 if (objfile
->separate_debug_objfile_backlink
)
14503 objfile
= objfile
->separate_debug_objfile_backlink
;
14508 /* Return the address size given in the compilation unit header for CU. */
14511 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14514 return per_cu
->cu
->header
.addr_size
;
14517 /* If the CU is not currently read in, we re-read its header. */
14518 struct objfile
*objfile
= per_cu
->objfile
;
14519 struct dwarf2_per_objfile
*per_objfile
14520 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14521 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14522 struct comp_unit_head cu_header
;
14524 memset (&cu_header
, 0, sizeof cu_header
);
14525 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14526 return cu_header
.addr_size
;
14530 /* Return the offset size given in the compilation unit header for CU. */
14533 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14536 return per_cu
->cu
->header
.offset_size
;
14539 /* If the CU is not currently read in, we re-read its header. */
14540 struct objfile
*objfile
= per_cu
->objfile
;
14541 struct dwarf2_per_objfile
*per_objfile
14542 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14543 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14544 struct comp_unit_head cu_header
;
14546 memset (&cu_header
, 0, sizeof cu_header
);
14547 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14548 return cu_header
.offset_size
;
14552 /* Return the text offset of the CU. The returned offset comes from
14553 this CU's objfile. If this objfile came from a separate debuginfo
14554 file, then the offset may be different from the corresponding
14555 offset in the parent objfile. */
14558 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14560 struct objfile
*objfile
= per_cu
->objfile
;
14562 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14565 /* Locate the .debug_info compilation unit from CU's objfile which contains
14566 the DIE at OFFSET. Raises an error on failure. */
14568 static struct dwarf2_per_cu_data
*
14569 dwarf2_find_containing_comp_unit (unsigned int offset
,
14570 struct objfile
*objfile
)
14572 struct dwarf2_per_cu_data
*this_cu
;
14576 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14579 int mid
= low
+ (high
- low
) / 2;
14581 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14586 gdb_assert (low
== high
);
14587 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14590 error (_("Dwarf Error: could not find partial DIE containing "
14591 "offset 0x%lx [in module %s]"),
14592 (long) offset
, bfd_get_filename (objfile
->obfd
));
14594 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14595 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14599 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14600 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14601 && offset
>= this_cu
->offset
+ this_cu
->length
)
14602 error (_("invalid dwarf2 offset %u"), offset
);
14603 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14608 /* Locate the compilation unit from OBJFILE which is located at exactly
14609 OFFSET. Raises an error on failure. */
14611 static struct dwarf2_per_cu_data
*
14612 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14614 struct dwarf2_per_cu_data
*this_cu
;
14616 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14617 if (this_cu
->offset
!= offset
)
14618 error (_("no compilation unit with offset %u."), offset
);
14622 /* Initialize dwarf2_cu CU for OBJFILE in a pre-allocated space. */
14625 init_one_comp_unit (struct dwarf2_cu
*cu
, struct objfile
*objfile
)
14627 memset (cu
, 0, sizeof (*cu
));
14628 cu
->objfile
= objfile
;
14629 obstack_init (&cu
->comp_unit_obstack
);
14632 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
14635 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
14637 struct attribute
*attr
;
14639 /* Set the language we're debugging. */
14640 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
14642 set_cu_language (DW_UNSND (attr
), cu
);
14644 set_cu_language (language_minimal
, cu
);
14647 /* Release one cached compilation unit, CU. We unlink it from the tree
14648 of compilation units, but we don't remove it from the read_in_chain;
14649 the caller is responsible for that.
14650 NOTE: DATA is a void * because this function is also used as a
14651 cleanup routine. */
14654 free_one_comp_unit (void *data
)
14656 struct dwarf2_cu
*cu
= data
;
14658 if (cu
->per_cu
!= NULL
)
14659 cu
->per_cu
->cu
= NULL
;
14662 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14667 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14668 when we're finished with it. We can't free the pointer itself, but be
14669 sure to unlink it from the cache. Also release any associated storage
14670 and perform cache maintenance.
14672 Only used during partial symbol parsing. */
14675 free_stack_comp_unit (void *data
)
14677 struct dwarf2_cu
*cu
= data
;
14679 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14680 cu
->partial_dies
= NULL
;
14682 if (cu
->per_cu
!= NULL
)
14684 /* This compilation unit is on the stack in our caller, so we
14685 should not xfree it. Just unlink it. */
14686 cu
->per_cu
->cu
= NULL
;
14689 /* If we had a per-cu pointer, then we may have other compilation
14690 units loaded, so age them now. */
14691 age_cached_comp_units ();
14695 /* Free all cached compilation units. */
14698 free_cached_comp_units (void *data
)
14700 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14702 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14703 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14704 while (per_cu
!= NULL
)
14706 struct dwarf2_per_cu_data
*next_cu
;
14708 next_cu
= per_cu
->cu
->read_in_chain
;
14710 free_one_comp_unit (per_cu
->cu
);
14711 *last_chain
= next_cu
;
14717 /* Increase the age counter on each cached compilation unit, and free
14718 any that are too old. */
14721 age_cached_comp_units (void)
14723 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14725 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14726 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14727 while (per_cu
!= NULL
)
14729 per_cu
->cu
->last_used
++;
14730 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14731 dwarf2_mark (per_cu
->cu
);
14732 per_cu
= per_cu
->cu
->read_in_chain
;
14735 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14736 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14737 while (per_cu
!= NULL
)
14739 struct dwarf2_per_cu_data
*next_cu
;
14741 next_cu
= per_cu
->cu
->read_in_chain
;
14743 if (!per_cu
->cu
->mark
)
14745 free_one_comp_unit (per_cu
->cu
);
14746 *last_chain
= next_cu
;
14749 last_chain
= &per_cu
->cu
->read_in_chain
;
14755 /* Remove a single compilation unit from the cache. */
14758 free_one_cached_comp_unit (void *target_cu
)
14760 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14762 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14763 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14764 while (per_cu
!= NULL
)
14766 struct dwarf2_per_cu_data
*next_cu
;
14768 next_cu
= per_cu
->cu
->read_in_chain
;
14770 if (per_cu
->cu
== target_cu
)
14772 free_one_comp_unit (per_cu
->cu
);
14773 *last_chain
= next_cu
;
14777 last_chain
= &per_cu
->cu
->read_in_chain
;
14783 /* Release all extra memory associated with OBJFILE. */
14786 dwarf2_free_objfile (struct objfile
*objfile
)
14788 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14790 if (dwarf2_per_objfile
== NULL
)
14793 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14794 free_cached_comp_units (NULL
);
14796 if (dwarf2_per_objfile
->quick_file_names_table
)
14797 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
14799 /* Everything else should be on the objfile obstack. */
14802 /* A pair of DIE offset and GDB type pointer. We store these
14803 in a hash table separate from the DIEs, and preserve them
14804 when the DIEs are flushed out of cache. */
14806 struct dwarf2_offset_and_type
14808 unsigned int offset
;
14812 /* Hash function for a dwarf2_offset_and_type. */
14815 offset_and_type_hash (const void *item
)
14817 const struct dwarf2_offset_and_type
*ofs
= item
;
14819 return ofs
->offset
;
14822 /* Equality function for a dwarf2_offset_and_type. */
14825 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14827 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14828 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14830 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14833 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14834 table if necessary. For convenience, return TYPE.
14836 The DIEs reading must have careful ordering to:
14837 * Not cause infite loops trying to read in DIEs as a prerequisite for
14838 reading current DIE.
14839 * Not trying to dereference contents of still incompletely read in types
14840 while reading in other DIEs.
14841 * Enable referencing still incompletely read in types just by a pointer to
14842 the type without accessing its fields.
14844 Therefore caller should follow these rules:
14845 * Try to fetch any prerequisite types we may need to build this DIE type
14846 before building the type and calling set_die_type.
14847 * After building type call set_die_type for current DIE as soon as
14848 possible before fetching more types to complete the current type.
14849 * Make the type as complete as possible before fetching more types. */
14851 static struct type
*
14852 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14854 struct dwarf2_offset_and_type
**slot
, ofs
;
14855 struct objfile
*objfile
= cu
->objfile
;
14856 htab_t
*type_hash_ptr
;
14858 /* For Ada types, make sure that the gnat-specific data is always
14859 initialized (if not already set). There are a few types where
14860 we should not be doing so, because the type-specific area is
14861 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14862 where the type-specific area is used to store the floatformat).
14863 But this is not a problem, because the gnat-specific information
14864 is actually not needed for these types. */
14865 if (need_gnat_info (cu
)
14866 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14867 && TYPE_CODE (type
) != TYPE_CODE_FLT
14868 && !HAVE_GNAT_AUX_INFO (type
))
14869 INIT_GNAT_SPECIFIC (type
);
14871 if (cu
->per_cu
->from_debug_types
)
14872 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14874 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14876 if (*type_hash_ptr
== NULL
)
14879 = htab_create_alloc_ex (127,
14880 offset_and_type_hash
,
14881 offset_and_type_eq
,
14883 &objfile
->objfile_obstack
,
14884 hashtab_obstack_allocate
,
14885 dummy_obstack_deallocate
);
14888 ofs
.offset
= die
->offset
;
14890 slot
= (struct dwarf2_offset_and_type
**)
14891 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14893 complaint (&symfile_complaints
,
14894 _("A problem internal to GDB: DIE 0x%x has type already set"),
14896 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14901 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14902 table, or return NULL if the die does not have a saved type. */
14904 static struct type
*
14905 get_die_type_at_offset (unsigned int offset
,
14906 struct dwarf2_per_cu_data
*per_cu
)
14908 struct dwarf2_offset_and_type
*slot
, ofs
;
14911 if (per_cu
->from_debug_types
)
14912 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14914 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14915 if (type_hash
== NULL
)
14918 ofs
.offset
= offset
;
14919 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14926 /* Look up the type for DIE in the appropriate type_hash table,
14927 or return NULL if DIE does not have a saved type. */
14929 static struct type
*
14930 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14932 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14935 /* Add a dependence relationship from CU to REF_PER_CU. */
14938 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14939 struct dwarf2_per_cu_data
*ref_per_cu
)
14943 if (cu
->dependencies
== NULL
)
14945 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14946 NULL
, &cu
->comp_unit_obstack
,
14947 hashtab_obstack_allocate
,
14948 dummy_obstack_deallocate
);
14950 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14952 *slot
= ref_per_cu
;
14955 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14956 Set the mark field in every compilation unit in the
14957 cache that we must keep because we are keeping CU. */
14960 dwarf2_mark_helper (void **slot
, void *data
)
14962 struct dwarf2_per_cu_data
*per_cu
;
14964 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14965 if (per_cu
->cu
->mark
)
14967 per_cu
->cu
->mark
= 1;
14969 if (per_cu
->cu
->dependencies
!= NULL
)
14970 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14975 /* Set the mark field in CU and in every other compilation unit in the
14976 cache that we must keep because we are keeping CU. */
14979 dwarf2_mark (struct dwarf2_cu
*cu
)
14984 if (cu
->dependencies
!= NULL
)
14985 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14989 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14993 per_cu
->cu
->mark
= 0;
14994 per_cu
= per_cu
->cu
->read_in_chain
;
14998 /* Trivial hash function for partial_die_info: the hash value of a DIE
14999 is its offset in .debug_info for this objfile. */
15002 partial_die_hash (const void *item
)
15004 const struct partial_die_info
*part_die
= item
;
15006 return part_die
->offset
;
15009 /* Trivial comparison function for partial_die_info structures: two DIEs
15010 are equal if they have the same offset. */
15013 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
15015 const struct partial_die_info
*part_die_lhs
= item_lhs
;
15016 const struct partial_die_info
*part_die_rhs
= item_rhs
;
15018 return part_die_lhs
->offset
== part_die_rhs
->offset
;
15021 static struct cmd_list_element
*set_dwarf2_cmdlist
;
15022 static struct cmd_list_element
*show_dwarf2_cmdlist
;
15025 set_dwarf2_cmd (char *args
, int from_tty
)
15027 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
15031 show_dwarf2_cmd (char *args
, int from_tty
)
15033 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
15036 /* If section described by INFO was mmapped, munmap it now. */
15039 munmap_section_buffer (struct dwarf2_section_info
*info
)
15041 if (info
->was_mmapped
)
15044 intptr_t begin
= (intptr_t) info
->buffer
;
15045 intptr_t map_begin
= begin
& ~(pagesize
- 1);
15046 size_t map_length
= info
->size
+ begin
- map_begin
;
15048 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
15050 /* Without HAVE_MMAP, we should never be here to begin with. */
15051 gdb_assert_not_reached ("no mmap support");
15056 /* munmap debug sections for OBJFILE, if necessary. */
15059 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
15061 struct dwarf2_per_objfile
*data
= d
;
15063 /* This is sorted according to the order they're defined in to make it easier
15064 to keep in sync. */
15065 munmap_section_buffer (&data
->info
);
15066 munmap_section_buffer (&data
->abbrev
);
15067 munmap_section_buffer (&data
->line
);
15068 munmap_section_buffer (&data
->loc
);
15069 munmap_section_buffer (&data
->macinfo
);
15070 munmap_section_buffer (&data
->str
);
15071 munmap_section_buffer (&data
->ranges
);
15072 munmap_section_buffer (&data
->types
);
15073 munmap_section_buffer (&data
->frame
);
15074 munmap_section_buffer (&data
->eh_frame
);
15075 munmap_section_buffer (&data
->gdb_index
);
15079 /* The "save gdb-index" command. */
15081 /* The contents of the hash table we create when building the string
15083 struct strtab_entry
15085 offset_type offset
;
15089 /* Hash function for a strtab_entry. */
15092 hash_strtab_entry (const void *e
)
15094 const struct strtab_entry
*entry
= e
;
15095 return mapped_index_string_hash (entry
->str
);
15098 /* Equality function for a strtab_entry. */
15101 eq_strtab_entry (const void *a
, const void *b
)
15103 const struct strtab_entry
*ea
= a
;
15104 const struct strtab_entry
*eb
= b
;
15105 return !strcmp (ea
->str
, eb
->str
);
15108 /* Create a strtab_entry hash table. */
15111 create_strtab (void)
15113 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
15114 xfree
, xcalloc
, xfree
);
15117 /* Add a string to the constant pool. Return the string's offset in
15121 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
15124 struct strtab_entry entry
;
15125 struct strtab_entry
*result
;
15128 slot
= htab_find_slot (table
, &entry
, INSERT
);
15133 result
= XNEW (struct strtab_entry
);
15134 result
->offset
= obstack_object_size (cpool
);
15136 obstack_grow_str0 (cpool
, str
);
15139 return result
->offset
;
15142 /* An entry in the symbol table. */
15143 struct symtab_index_entry
15145 /* The name of the symbol. */
15147 /* The offset of the name in the constant pool. */
15148 offset_type index_offset
;
15149 /* A sorted vector of the indices of all the CUs that hold an object
15151 VEC (offset_type
) *cu_indices
;
15154 /* The symbol table. This is a power-of-2-sized hash table. */
15155 struct mapped_symtab
15157 offset_type n_elements
;
15159 struct symtab_index_entry
**data
;
15162 /* Hash function for a symtab_index_entry. */
15165 hash_symtab_entry (const void *e
)
15167 const struct symtab_index_entry
*entry
= e
;
15168 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
15169 sizeof (offset_type
) * VEC_length (offset_type
,
15170 entry
->cu_indices
),
15174 /* Equality function for a symtab_index_entry. */
15177 eq_symtab_entry (const void *a
, const void *b
)
15179 const struct symtab_index_entry
*ea
= a
;
15180 const struct symtab_index_entry
*eb
= b
;
15181 int len
= VEC_length (offset_type
, ea
->cu_indices
);
15182 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
15184 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
15185 VEC_address (offset_type
, eb
->cu_indices
),
15186 sizeof (offset_type
) * len
);
15189 /* Destroy a symtab_index_entry. */
15192 delete_symtab_entry (void *p
)
15194 struct symtab_index_entry
*entry
= p
;
15195 VEC_free (offset_type
, entry
->cu_indices
);
15199 /* Create a hash table holding symtab_index_entry objects. */
15202 create_symbol_hash_table (void)
15204 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
15205 delete_symtab_entry
, xcalloc
, xfree
);
15208 /* Create a new mapped symtab object. */
15210 static struct mapped_symtab
*
15211 create_mapped_symtab (void)
15213 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
15214 symtab
->n_elements
= 0;
15215 symtab
->size
= 1024;
15216 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15220 /* Destroy a mapped_symtab. */
15223 cleanup_mapped_symtab (void *p
)
15225 struct mapped_symtab
*symtab
= p
;
15226 /* The contents of the array are freed when the other hash table is
15228 xfree (symtab
->data
);
15232 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
15235 static struct symtab_index_entry
**
15236 find_slot (struct mapped_symtab
*symtab
, const char *name
)
15238 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
15240 index
= hash
& (symtab
->size
- 1);
15241 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
15245 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
15246 return &symtab
->data
[index
];
15247 index
= (index
+ step
) & (symtab
->size
- 1);
15251 /* Expand SYMTAB's hash table. */
15254 hash_expand (struct mapped_symtab
*symtab
)
15256 offset_type old_size
= symtab
->size
;
15258 struct symtab_index_entry
**old_entries
= symtab
->data
;
15261 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
15263 for (i
= 0; i
< old_size
; ++i
)
15265 if (old_entries
[i
])
15267 struct symtab_index_entry
**slot
= find_slot (symtab
,
15268 old_entries
[i
]->name
);
15269 *slot
= old_entries
[i
];
15273 xfree (old_entries
);
15276 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
15277 is the index of the CU in which the symbol appears. */
15280 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
15281 offset_type cu_index
)
15283 struct symtab_index_entry
**slot
;
15285 ++symtab
->n_elements
;
15286 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
15287 hash_expand (symtab
);
15289 slot
= find_slot (symtab
, name
);
15292 *slot
= XNEW (struct symtab_index_entry
);
15293 (*slot
)->name
= name
;
15294 (*slot
)->cu_indices
= NULL
;
15296 /* Don't push an index twice. Due to how we add entries we only
15297 have to check the last one. */
15298 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
15299 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
15300 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
15303 /* Add a vector of indices to the constant pool. */
15306 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
15307 struct symtab_index_entry
*entry
)
15311 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
15314 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
15315 offset_type val
= MAYBE_SWAP (len
);
15320 entry
->index_offset
= obstack_object_size (cpool
);
15322 obstack_grow (cpool
, &val
, sizeof (val
));
15324 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
15327 val
= MAYBE_SWAP (iter
);
15328 obstack_grow (cpool
, &val
, sizeof (val
));
15333 struct symtab_index_entry
*old_entry
= *slot
;
15334 entry
->index_offset
= old_entry
->index_offset
;
15337 return entry
->index_offset
;
15340 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
15341 constant pool entries going into the obstack CPOOL. */
15344 write_hash_table (struct mapped_symtab
*symtab
,
15345 struct obstack
*output
, struct obstack
*cpool
)
15348 htab_t symbol_hash_table
;
15351 symbol_hash_table
= create_symbol_hash_table ();
15352 str_table
= create_strtab ();
15354 /* We add all the index vectors to the constant pool first, to
15355 ensure alignment is ok. */
15356 for (i
= 0; i
< symtab
->size
; ++i
)
15358 if (symtab
->data
[i
])
15359 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
15362 /* Now write out the hash table. */
15363 for (i
= 0; i
< symtab
->size
; ++i
)
15365 offset_type str_off
, vec_off
;
15367 if (symtab
->data
[i
])
15369 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
15370 vec_off
= symtab
->data
[i
]->index_offset
;
15374 /* While 0 is a valid constant pool index, it is not valid
15375 to have 0 for both offsets. */
15380 str_off
= MAYBE_SWAP (str_off
);
15381 vec_off
= MAYBE_SWAP (vec_off
);
15383 obstack_grow (output
, &str_off
, sizeof (str_off
));
15384 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
15387 htab_delete (str_table
);
15388 htab_delete (symbol_hash_table
);
15391 /* Struct to map psymtab to CU index in the index file. */
15392 struct psymtab_cu_index_map
15394 struct partial_symtab
*psymtab
;
15395 unsigned int cu_index
;
15399 hash_psymtab_cu_index (const void *item
)
15401 const struct psymtab_cu_index_map
*map
= item
;
15403 return htab_hash_pointer (map
->psymtab
);
15407 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
15409 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
15410 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
15412 return lhs
->psymtab
== rhs
->psymtab
;
15415 /* Helper struct for building the address table. */
15416 struct addrmap_index_data
15418 struct objfile
*objfile
;
15419 struct obstack
*addr_obstack
;
15420 htab_t cu_index_htab
;
15422 /* Non-zero if the previous_* fields are valid.
15423 We can't write an entry until we see the next entry (since it is only then
15424 that we know the end of the entry). */
15425 int previous_valid
;
15426 /* Index of the CU in the table of all CUs in the index file. */
15427 unsigned int previous_cu_index
;
15428 /* Start address of the CU. */
15429 CORE_ADDR previous_cu_start
;
15432 /* Write an address entry to OBSTACK. */
15435 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
15436 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
15438 offset_type cu_index_to_write
;
15440 CORE_ADDR baseaddr
;
15442 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15444 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
15445 obstack_grow (obstack
, addr
, 8);
15446 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
15447 obstack_grow (obstack
, addr
, 8);
15448 cu_index_to_write
= MAYBE_SWAP (cu_index
);
15449 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
15452 /* Worker function for traversing an addrmap to build the address table. */
15455 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
15457 struct addrmap_index_data
*data
= datap
;
15458 struct partial_symtab
*pst
= obj
;
15459 offset_type cu_index
;
15462 if (data
->previous_valid
)
15463 add_address_entry (data
->objfile
, data
->addr_obstack
,
15464 data
->previous_cu_start
, start_addr
,
15465 data
->previous_cu_index
);
15467 data
->previous_cu_start
= start_addr
;
15470 struct psymtab_cu_index_map find_map
, *map
;
15471 find_map
.psymtab
= pst
;
15472 map
= htab_find (data
->cu_index_htab
, &find_map
);
15473 gdb_assert (map
!= NULL
);
15474 data
->previous_cu_index
= map
->cu_index
;
15475 data
->previous_valid
= 1;
15478 data
->previous_valid
= 0;
15483 /* Write OBJFILE's address map to OBSTACK.
15484 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
15485 in the index file. */
15488 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
15489 htab_t cu_index_htab
)
15491 struct addrmap_index_data addrmap_index_data
;
15493 /* When writing the address table, we have to cope with the fact that
15494 the addrmap iterator only provides the start of a region; we have to
15495 wait until the next invocation to get the start of the next region. */
15497 addrmap_index_data
.objfile
= objfile
;
15498 addrmap_index_data
.addr_obstack
= obstack
;
15499 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
15500 addrmap_index_data
.previous_valid
= 0;
15502 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
15503 &addrmap_index_data
);
15505 /* It's highly unlikely the last entry (end address = 0xff...ff)
15506 is valid, but we should still handle it.
15507 The end address is recorded as the start of the next region, but that
15508 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
15510 if (addrmap_index_data
.previous_valid
)
15511 add_address_entry (objfile
, obstack
,
15512 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
15513 addrmap_index_data
.previous_cu_index
);
15516 /* Add a list of partial symbols to SYMTAB. */
15519 write_psymbols (struct mapped_symtab
*symtab
,
15521 struct partial_symbol
**psymp
,
15523 offset_type cu_index
,
15526 for (; count
-- > 0; ++psymp
)
15528 void **slot
, *lookup
;
15530 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
15531 error (_("Ada is not currently supported by the index"));
15533 /* We only want to add a given psymbol once. However, we also
15534 want to account for whether it is global or static. So, we
15535 may add it twice, using slightly different values. */
15538 uintptr_t val
= 1 | (uintptr_t) *psymp
;
15540 lookup
= (void *) val
;
15545 /* Only add a given psymbol once. */
15546 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
15550 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
15555 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
15556 exception if there is an error. */
15559 write_obstack (FILE *file
, struct obstack
*obstack
)
15561 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
15563 != obstack_object_size (obstack
))
15564 error (_("couldn't data write to file"));
15567 /* Unlink a file if the argument is not NULL. */
15570 unlink_if_set (void *p
)
15572 char **filename
= p
;
15574 unlink (*filename
);
15577 /* A helper struct used when iterating over debug_types. */
15578 struct signatured_type_index_data
15580 struct objfile
*objfile
;
15581 struct mapped_symtab
*symtab
;
15582 struct obstack
*types_list
;
15587 /* A helper function that writes a single signatured_type to an
15591 write_one_signatured_type (void **slot
, void *d
)
15593 struct signatured_type_index_data
*info
= d
;
15594 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
15595 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
15596 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15599 write_psymbols (info
->symtab
,
15601 info
->objfile
->global_psymbols
.list
15602 + psymtab
->globals_offset
,
15603 psymtab
->n_global_syms
, info
->cu_index
,
15605 write_psymbols (info
->symtab
,
15607 info
->objfile
->static_psymbols
.list
15608 + psymtab
->statics_offset
,
15609 psymtab
->n_static_syms
, info
->cu_index
,
15612 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
15613 obstack_grow (info
->types_list
, val
, 8);
15614 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
15615 obstack_grow (info
->types_list
, val
, 8);
15616 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
15617 obstack_grow (info
->types_list
, val
, 8);
15624 /* A cleanup function for an htab_t. */
15627 cleanup_htab (void *arg
)
15632 /* Create an index file for OBJFILE in the directory DIR. */
15635 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
15637 struct cleanup
*cleanup
;
15638 char *filename
, *cleanup_filename
;
15639 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
15640 struct obstack cu_list
, types_cu_list
;
15643 struct mapped_symtab
*symtab
;
15644 offset_type val
, size_of_contents
, total_len
;
15648 htab_t cu_index_htab
;
15649 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
15651 if (!objfile
->psymtabs
)
15653 if (dwarf2_per_objfile
->using_index
)
15654 error (_("Cannot use an index to create the index"));
15656 if (stat (objfile
->name
, &st
) < 0)
15657 perror_with_name (objfile
->name
);
15659 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15660 INDEX_SUFFIX
, (char *) NULL
);
15661 cleanup
= make_cleanup (xfree
, filename
);
15663 out_file
= fopen (filename
, "wb");
15665 error (_("Can't open `%s' for writing"), filename
);
15667 cleanup_filename
= filename
;
15668 make_cleanup (unlink_if_set
, &cleanup_filename
);
15670 symtab
= create_mapped_symtab ();
15671 make_cleanup (cleanup_mapped_symtab
, symtab
);
15673 obstack_init (&addr_obstack
);
15674 make_cleanup_obstack_free (&addr_obstack
);
15676 obstack_init (&cu_list
);
15677 make_cleanup_obstack_free (&cu_list
);
15679 obstack_init (&types_cu_list
);
15680 make_cleanup_obstack_free (&types_cu_list
);
15682 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
15683 NULL
, xcalloc
, xfree
);
15684 make_cleanup (cleanup_htab
, psyms_seen
);
15686 /* While we're scanning CU's create a table that maps a psymtab pointer
15687 (which is what addrmap records) to its index (which is what is recorded
15688 in the index file). This will later be needed to write the address
15690 cu_index_htab
= htab_create_alloc (100,
15691 hash_psymtab_cu_index
,
15692 eq_psymtab_cu_index
,
15693 NULL
, xcalloc
, xfree
);
15694 make_cleanup (cleanup_htab
, cu_index_htab
);
15695 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
15696 xmalloc (sizeof (struct psymtab_cu_index_map
)
15697 * dwarf2_per_objfile
->n_comp_units
);
15698 make_cleanup (xfree
, psymtab_cu_index_map
);
15700 /* The CU list is already sorted, so we don't need to do additional
15701 work here. Also, the debug_types entries do not appear in
15702 all_comp_units, but only in their own hash table. */
15703 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15705 struct dwarf2_per_cu_data
*per_cu
15706 = dwarf2_per_objfile
->all_comp_units
[i
];
15707 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15709 struct psymtab_cu_index_map
*map
;
15712 write_psymbols (symtab
,
15714 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15715 psymtab
->n_global_syms
, i
,
15717 write_psymbols (symtab
,
15719 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15720 psymtab
->n_static_syms
, i
,
15723 map
= &psymtab_cu_index_map
[i
];
15724 map
->psymtab
= psymtab
;
15726 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
15727 gdb_assert (slot
!= NULL
);
15728 gdb_assert (*slot
== NULL
);
15731 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15732 obstack_grow (&cu_list
, val
, 8);
15733 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15734 obstack_grow (&cu_list
, val
, 8);
15737 /* Dump the address map. */
15738 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
15740 /* Write out the .debug_type entries, if any. */
15741 if (dwarf2_per_objfile
->signatured_types
)
15743 struct signatured_type_index_data sig_data
;
15745 sig_data
.objfile
= objfile
;
15746 sig_data
.symtab
= symtab
;
15747 sig_data
.types_list
= &types_cu_list
;
15748 sig_data
.psyms_seen
= psyms_seen
;
15749 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15750 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15751 write_one_signatured_type
, &sig_data
);
15754 obstack_init (&constant_pool
);
15755 make_cleanup_obstack_free (&constant_pool
);
15756 obstack_init (&symtab_obstack
);
15757 make_cleanup_obstack_free (&symtab_obstack
);
15758 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15760 obstack_init (&contents
);
15761 make_cleanup_obstack_free (&contents
);
15762 size_of_contents
= 6 * sizeof (offset_type
);
15763 total_len
= size_of_contents
;
15765 /* The version number. */
15766 val
= MAYBE_SWAP (4);
15767 obstack_grow (&contents
, &val
, sizeof (val
));
15769 /* The offset of the CU list from the start of the file. */
15770 val
= MAYBE_SWAP (total_len
);
15771 obstack_grow (&contents
, &val
, sizeof (val
));
15772 total_len
+= obstack_object_size (&cu_list
);
15774 /* The offset of the types CU list from the start of the file. */
15775 val
= MAYBE_SWAP (total_len
);
15776 obstack_grow (&contents
, &val
, sizeof (val
));
15777 total_len
+= obstack_object_size (&types_cu_list
);
15779 /* The offset of the address table from the start of the file. */
15780 val
= MAYBE_SWAP (total_len
);
15781 obstack_grow (&contents
, &val
, sizeof (val
));
15782 total_len
+= obstack_object_size (&addr_obstack
);
15784 /* The offset of the symbol table from the start of the file. */
15785 val
= MAYBE_SWAP (total_len
);
15786 obstack_grow (&contents
, &val
, sizeof (val
));
15787 total_len
+= obstack_object_size (&symtab_obstack
);
15789 /* The offset of the constant pool from the start of the file. */
15790 val
= MAYBE_SWAP (total_len
);
15791 obstack_grow (&contents
, &val
, sizeof (val
));
15792 total_len
+= obstack_object_size (&constant_pool
);
15794 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15796 write_obstack (out_file
, &contents
);
15797 write_obstack (out_file
, &cu_list
);
15798 write_obstack (out_file
, &types_cu_list
);
15799 write_obstack (out_file
, &addr_obstack
);
15800 write_obstack (out_file
, &symtab_obstack
);
15801 write_obstack (out_file
, &constant_pool
);
15805 /* We want to keep the file, so we set cleanup_filename to NULL
15806 here. See unlink_if_set. */
15807 cleanup_filename
= NULL
;
15809 do_cleanups (cleanup
);
15812 /* The mapped index file format is designed to be directly mmap()able
15813 on any architecture. In most cases, a datum is represented using a
15814 little-endian 32-bit integer value, called an offset_type. Big
15815 endian machines must byte-swap the values before using them.
15816 Exceptions to this rule are noted. The data is laid out such that
15817 alignment is always respected.
15819 A mapped index consists of several sections.
15821 1. The file header. This is a sequence of values, of offset_type
15822 unless otherwise noted:
15824 [0] The version number, currently 4. Versions 1, 2 and 3 are
15826 [1] The offset, from the start of the file, of the CU list.
15827 [2] The offset, from the start of the file, of the types CU list.
15828 Note that this section can be empty, in which case this offset will
15829 be equal to the next offset.
15830 [3] The offset, from the start of the file, of the address section.
15831 [4] The offset, from the start of the file, of the symbol table.
15832 [5] The offset, from the start of the file, of the constant pool.
15834 2. The CU list. This is a sequence of pairs of 64-bit
15835 little-endian values, sorted by the CU offset. The first element
15836 in each pair is the offset of a CU in the .debug_info section. The
15837 second element in each pair is the length of that CU. References
15838 to a CU elsewhere in the map are done using a CU index, which is
15839 just the 0-based index into this table. Note that if there are
15840 type CUs, then conceptually CUs and type CUs form a single list for
15841 the purposes of CU indices.
15843 3. The types CU list. This is a sequence of triplets of 64-bit
15844 little-endian values. In a triplet, the first value is the CU
15845 offset, the second value is the type offset in the CU, and the
15846 third value is the type signature. The types CU list is not
15849 4. The address section. The address section consists of a sequence
15850 of address entries. Each address entry has three elements.
15851 [0] The low address. This is a 64-bit little-endian value.
15852 [1] The high address. This is a 64-bit little-endian value.
15853 Like DW_AT_high_pc, the value is one byte beyond the end.
15854 [2] The CU index. This is an offset_type value.
15856 5. The symbol table. This is a hash table. The size of the hash
15857 table is always a power of 2. The initial hash and the step are
15858 currently defined by the `find_slot' function.
15860 Each slot in the hash table consists of a pair of offset_type
15861 values. The first value is the offset of the symbol's name in the
15862 constant pool. The second value is the offset of the CU vector in
15865 If both values are 0, then this slot in the hash table is empty.
15866 This is ok because while 0 is a valid constant pool index, it
15867 cannot be a valid index for both a string and a CU vector.
15869 A string in the constant pool is stored as a \0-terminated string,
15872 A CU vector in the constant pool is a sequence of offset_type
15873 values. The first value is the number of CU indices in the vector.
15874 Each subsequent value is the index of a CU in the CU list. This
15875 element in the hash table is used to indicate which CUs define the
15878 6. The constant pool. This is simply a bunch of bytes. It is
15879 organized so that alignment is correct: CU vectors are stored
15880 first, followed by strings. */
15883 save_gdb_index_command (char *arg
, int from_tty
)
15885 struct objfile
*objfile
;
15888 error (_("usage: save gdb-index DIRECTORY"));
15890 ALL_OBJFILES (objfile
)
15894 /* If the objfile does not correspond to an actual file, skip it. */
15895 if (stat (objfile
->name
, &st
) < 0)
15898 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15899 if (dwarf2_per_objfile
)
15901 volatile struct gdb_exception except
;
15903 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15905 write_psymtabs_to_index (objfile
, arg
);
15907 if (except
.reason
< 0)
15908 exception_fprintf (gdb_stderr
, except
,
15909 _("Error while writing index for `%s': "),
15917 int dwarf2_always_disassemble
;
15920 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15921 struct cmd_list_element
*c
, const char *value
)
15923 fprintf_filtered (file
,
15924 _("Whether to always disassemble "
15925 "DWARF expressions is %s.\n"),
15929 void _initialize_dwarf2_read (void);
15932 _initialize_dwarf2_read (void)
15934 struct cmd_list_element
*c
;
15936 dwarf2_objfile_data_key
15937 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15939 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15940 Set DWARF 2 specific variables.\n\
15941 Configure DWARF 2 variables such as the cache size"),
15942 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15943 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15945 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15946 Show DWARF 2 specific variables\n\
15947 Show DWARF 2 variables such as the cache size"),
15948 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15949 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15951 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15952 &dwarf2_max_cache_age
, _("\
15953 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15954 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15955 A higher limit means that cached compilation units will be stored\n\
15956 in memory longer, and more total memory will be used. Zero disables\n\
15957 caching, which can slow down startup."),
15959 show_dwarf2_max_cache_age
,
15960 &set_dwarf2_cmdlist
,
15961 &show_dwarf2_cmdlist
);
15963 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15964 &dwarf2_always_disassemble
, _("\
15965 Set whether `info address' always disassembles DWARF expressions."), _("\
15966 Show whether `info address' always disassembles DWARF expressions."), _("\
15967 When enabled, DWARF expressions are always printed in an assembly-like\n\
15968 syntax. When disabled, expressions will be printed in a more\n\
15969 conversational style, when possible."),
15971 show_dwarf2_always_disassemble
,
15972 &set_dwarf2_cmdlist
,
15973 &show_dwarf2_cmdlist
);
15975 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15976 Set debugging of the dwarf2 DIE reader."), _("\
15977 Show debugging of the dwarf2 DIE reader."), _("\
15978 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15979 The value is the maximum depth to print."),
15982 &setdebuglist
, &showdebuglist
);
15984 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15986 Save a gdb-index file.\n\
15987 Usage: save gdb-index DIRECTORY"),
15989 set_cmd_completer (c
, filename_completer
);