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
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 hash table. */
158 const offset_type
*index_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type index_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 unsigned char using_index
;
210 /* The mapped index. */
211 struct mapped_index
*index_table
;
213 /* Set during partial symbol reading, to prevent queueing of full
215 int reading_partial_symbols
;
217 /* Table mapping type .debug_info DIE offsets to types.
218 This is NULL if not allocated yet.
219 It (currently) makes sense to allocate debug_types_type_hash lazily.
220 To keep things simple we allocate both lazily. */
221 htab_t debug_info_type_hash
;
223 /* Table mapping type .debug_types DIE offsets to types.
224 This is NULL if not allocated yet. */
225 htab_t debug_types_type_hash
;
228 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
230 /* names of the debugging sections */
232 /* Note that if the debugging section has been compressed, it might
233 have a name like .zdebug_info. */
235 #define INFO_SECTION "debug_info"
236 #define ABBREV_SECTION "debug_abbrev"
237 #define LINE_SECTION "debug_line"
238 #define LOC_SECTION "debug_loc"
239 #define MACINFO_SECTION "debug_macinfo"
240 #define STR_SECTION "debug_str"
241 #define RANGES_SECTION "debug_ranges"
242 #define TYPES_SECTION "debug_types"
243 #define FRAME_SECTION "debug_frame"
244 #define EH_FRAME_SECTION "eh_frame"
245 #define GDB_INDEX_SECTION "gdb_index"
247 /* local data types */
249 /* We hold several abbreviation tables in memory at the same time. */
250 #ifndef ABBREV_HASH_SIZE
251 #define ABBREV_HASH_SIZE 121
254 /* The data in a compilation unit header, after target2host
255 translation, looks like this. */
256 struct comp_unit_head
260 unsigned char addr_size
;
261 unsigned char signed_addr_p
;
262 unsigned int abbrev_offset
;
264 /* Size of file offsets; either 4 or 8. */
265 unsigned int offset_size
;
267 /* Size of the length field; either 4 or 12. */
268 unsigned int initial_length_size
;
270 /* Offset to the first byte of this compilation unit header in the
271 .debug_info section, for resolving relative reference dies. */
274 /* Offset to first die in this cu from the start of the cu.
275 This will be the first byte following the compilation unit header. */
276 unsigned int first_die_offset
;
279 /* Type used for delaying computation of method physnames.
280 See comments for compute_delayed_physnames. */
281 struct delayed_method_info
283 /* The type to which the method is attached, i.e., its parent class. */
286 /* The index of the method in the type's function fieldlists. */
289 /* The index of the method in the fieldlist. */
292 /* The name of the DIE. */
295 /* The DIE associated with this method. */
296 struct die_info
*die
;
299 typedef struct delayed_method_info delayed_method_info
;
300 DEF_VEC_O (delayed_method_info
);
302 /* Internal state when decoding a particular compilation unit. */
305 /* The objfile containing this compilation unit. */
306 struct objfile
*objfile
;
308 /* The header of the compilation unit. */
309 struct comp_unit_head header
;
311 /* Base address of this compilation unit. */
312 CORE_ADDR base_address
;
314 /* Non-zero if base_address has been set. */
317 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
319 /* The language we are debugging. */
320 enum language language
;
321 const struct language_defn
*language_defn
;
323 const char *producer
;
325 /* The generic symbol table building routines have separate lists for
326 file scope symbols and all all other scopes (local scopes). So
327 we need to select the right one to pass to add_symbol_to_list().
328 We do it by keeping a pointer to the correct list in list_in_scope.
330 FIXME: The original dwarf code just treated the file scope as the
331 first local scope, and all other local scopes as nested local
332 scopes, and worked fine. Check to see if we really need to
333 distinguish these in buildsym.c. */
334 struct pending
**list_in_scope
;
336 /* DWARF abbreviation table associated with this compilation unit. */
337 struct abbrev_info
**dwarf2_abbrevs
;
339 /* Storage for the abbrev table. */
340 struct obstack abbrev_obstack
;
342 /* Hash table holding all the loaded partial DIEs. */
345 /* Storage for things with the same lifetime as this read-in compilation
346 unit, including partial DIEs. */
347 struct obstack comp_unit_obstack
;
349 /* When multiple dwarf2_cu structures are living in memory, this field
350 chains them all together, so that they can be released efficiently.
351 We will probably also want a generation counter so that most-recently-used
352 compilation units are cached... */
353 struct dwarf2_per_cu_data
*read_in_chain
;
355 /* Backchain to our per_cu entry if the tree has been built. */
356 struct dwarf2_per_cu_data
*per_cu
;
358 /* How many compilation units ago was this CU last referenced? */
361 /* A hash table of die offsets for following references. */
364 /* Full DIEs if read in. */
365 struct die_info
*dies
;
367 /* A set of pointers to dwarf2_per_cu_data objects for compilation
368 units referenced by this one. Only set during full symbol processing;
369 partial symbol tables do not have dependencies. */
372 /* Header data from the line table, during full symbol processing. */
373 struct line_header
*line_header
;
375 /* A list of methods which need to have physnames computed
376 after all type information has been read. */
377 VEC (delayed_method_info
) *method_list
;
379 /* Mark used when releasing cached dies. */
380 unsigned int mark
: 1;
382 /* This flag will be set if this compilation unit might include
383 inter-compilation-unit references. */
384 unsigned int has_form_ref_addr
: 1;
386 /* This flag will be set if this compilation unit includes any
387 DW_TAG_namespace DIEs. If we know that there are explicit
388 DIEs for namespaces, we don't need to try to infer them
389 from mangled names. */
390 unsigned int has_namespace_info
: 1;
393 /* When using the index (and thus not using psymtabs), each CU has an
394 object of this type. This is used to hold information needed by
395 the various "quick" methods. */
396 struct dwarf2_per_cu_quick_data
398 /* The line table. This can be NULL if there was no line table. */
399 struct line_header
*lines
;
401 /* The file names from the line table. */
402 const char **file_names
;
403 /* The file names from the line table after being run through
405 const char **full_names
;
407 /* The corresponding symbol table. This is NULL if symbols for this
408 CU have not yet been read. */
409 struct symtab
*symtab
;
411 /* A temporary mark bit used when iterating over all CUs in
412 expand_symtabs_matching. */
413 unsigned int mark
: 1;
415 /* True if we've tried to read the line table. */
416 unsigned int read_lines
: 1;
419 /* Persistent data held for a compilation unit, even when not
420 processing it. We put a pointer to this structure in the
421 read_symtab_private field of the psymtab. If we encounter
422 inter-compilation-unit references, we also maintain a sorted
423 list of all compilation units. */
425 struct dwarf2_per_cu_data
427 /* The start offset and length of this compilation unit. 2**29-1
428 bytes should suffice to store the length of any compilation unit
429 - if it doesn't, GDB will fall over anyway.
430 NOTE: Unlike comp_unit_head.length, this length includes
431 initial_length_size. */
433 unsigned int length
: 29;
435 /* Flag indicating this compilation unit will be read in before
436 any of the current compilation units are processed. */
437 unsigned int queued
: 1;
439 /* This flag will be set if we need to load absolutely all DIEs
440 for this compilation unit, instead of just the ones we think
441 are interesting. It gets set if we look for a DIE in the
442 hash table and don't find it. */
443 unsigned int load_all_dies
: 1;
445 /* Non-zero if this CU is from .debug_types.
446 Otherwise it's from .debug_info. */
447 unsigned int from_debug_types
: 1;
449 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
450 of the CU cache it gets reset to NULL again. */
451 struct dwarf2_cu
*cu
;
453 /* The corresponding objfile. */
454 struct objfile
*objfile
;
456 /* When using partial symbol tables, the 'psymtab' field is active.
457 Otherwise the 'quick' field is active. */
460 /* The partial symbol table associated with this compilation unit,
461 or NULL for partial units (which do not have an associated
463 struct partial_symtab
*psymtab
;
465 /* Data needed by the "quick" functions. */
466 struct dwarf2_per_cu_quick_data
*quick
;
470 /* Entry in the signatured_types hash table. */
472 struct signatured_type
476 /* Offset in .debug_types of the TU (type_unit) for this type. */
479 /* Offset in .debug_types of the type defined by this TU. */
480 unsigned int type_offset
;
482 /* The CU(/TU) of this type. */
483 struct dwarf2_per_cu_data per_cu
;
486 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
487 which are used for both .debug_info and .debug_types dies.
488 All parameters here are unchanging for the life of the call.
489 This struct exists to abstract away the constant parameters of
492 struct die_reader_specs
494 /* The bfd of this objfile. */
497 /* The CU of the DIE we are parsing. */
498 struct dwarf2_cu
*cu
;
500 /* Pointer to start of section buffer.
501 This is either the start of .debug_info or .debug_types. */
502 const gdb_byte
*buffer
;
505 /* The line number information for a compilation unit (found in the
506 .debug_line section) begins with a "statement program header",
507 which contains the following information. */
510 unsigned int total_length
;
511 unsigned short version
;
512 unsigned int header_length
;
513 unsigned char minimum_instruction_length
;
514 unsigned char maximum_ops_per_instruction
;
515 unsigned char default_is_stmt
;
517 unsigned char line_range
;
518 unsigned char opcode_base
;
520 /* standard_opcode_lengths[i] is the number of operands for the
521 standard opcode whose value is i. This means that
522 standard_opcode_lengths[0] is unused, and the last meaningful
523 element is standard_opcode_lengths[opcode_base - 1]. */
524 unsigned char *standard_opcode_lengths
;
526 /* The include_directories table. NOTE! These strings are not
527 allocated with xmalloc; instead, they are pointers into
528 debug_line_buffer. If you try to free them, `free' will get
530 unsigned int num_include_dirs
, include_dirs_size
;
533 /* The file_names table. NOTE! These strings are not allocated
534 with xmalloc; instead, they are pointers into debug_line_buffer.
535 Don't try to free them directly. */
536 unsigned int num_file_names
, file_names_size
;
540 unsigned int dir_index
;
541 unsigned int mod_time
;
543 int included_p
; /* Non-zero if referenced by the Line Number Program. */
544 struct symtab
*symtab
; /* The associated symbol table, if any. */
547 /* The start and end of the statement program following this
548 header. These point into dwarf2_per_objfile->line_buffer. */
549 gdb_byte
*statement_program_start
, *statement_program_end
;
552 /* When we construct a partial symbol table entry we only
553 need this much information. */
554 struct partial_die_info
556 /* Offset of this DIE. */
559 /* DWARF-2 tag for this DIE. */
560 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
562 /* Assorted flags describing the data found in this DIE. */
563 unsigned int has_children
: 1;
564 unsigned int is_external
: 1;
565 unsigned int is_declaration
: 1;
566 unsigned int has_type
: 1;
567 unsigned int has_specification
: 1;
568 unsigned int has_pc_info
: 1;
570 /* Flag set if the SCOPE field of this structure has been
572 unsigned int scope_set
: 1;
574 /* Flag set if the DIE has a byte_size attribute. */
575 unsigned int has_byte_size
: 1;
577 /* Flag set if any of the DIE's children are template arguments. */
578 unsigned int has_template_arguments
: 1;
580 /* The name of this DIE. Normally the value of DW_AT_name, but
581 sometimes a default name for unnamed DIEs. */
584 /* The scope to prepend to our children. This is generally
585 allocated on the comp_unit_obstack, so will disappear
586 when this compilation unit leaves the cache. */
589 /* The location description associated with this DIE, if any. */
590 struct dwarf_block
*locdesc
;
592 /* If HAS_PC_INFO, the PC range associated with this DIE. */
596 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
597 DW_AT_sibling, if any. */
600 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
601 DW_AT_specification (or DW_AT_abstract_origin or
603 unsigned int spec_offset
;
605 /* Pointers to this DIE's parent, first child, and next sibling,
607 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
610 /* This data structure holds the information of an abbrev. */
613 unsigned int number
; /* number identifying abbrev */
614 enum dwarf_tag tag
; /* dwarf tag */
615 unsigned short has_children
; /* boolean */
616 unsigned short num_attrs
; /* number of attributes */
617 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
618 struct abbrev_info
*next
; /* next in chain */
623 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
624 ENUM_BITFIELD(dwarf_form
) form
: 16;
627 /* Attributes have a name and a value */
630 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
631 ENUM_BITFIELD(dwarf_form
) form
: 15;
633 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
634 field should be in u.str (existing only for DW_STRING) but it is kept
635 here for better struct attribute alignment. */
636 unsigned int string_is_canonical
: 1;
641 struct dwarf_block
*blk
;
645 struct signatured_type
*signatured_type
;
650 /* This data structure holds a complete die structure. */
653 /* DWARF-2 tag for this DIE. */
654 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
656 /* Number of attributes */
657 unsigned char num_attrs
;
659 /* True if we're presently building the full type name for the
660 type derived from this DIE. */
661 unsigned char building_fullname
: 1;
666 /* Offset in .debug_info or .debug_types section. */
669 /* The dies in a compilation unit form an n-ary tree. PARENT
670 points to this die's parent; CHILD points to the first child of
671 this node; and all the children of a given node are chained
672 together via their SIBLING fields, terminated by a die whose
674 struct die_info
*child
; /* Its first child, if any. */
675 struct die_info
*sibling
; /* Its next sibling, if any. */
676 struct die_info
*parent
; /* Its parent, if any. */
678 /* An array of attributes, with NUM_ATTRS elements. There may be
679 zero, but it's not common and zero-sized arrays are not
680 sufficiently portable C. */
681 struct attribute attrs
[1];
684 struct function_range
687 CORE_ADDR lowpc
, highpc
;
689 struct function_range
*next
;
692 /* Get at parts of an attribute structure */
694 #define DW_STRING(attr) ((attr)->u.str)
695 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
696 #define DW_UNSND(attr) ((attr)->u.unsnd)
697 #define DW_BLOCK(attr) ((attr)->u.blk)
698 #define DW_SND(attr) ((attr)->u.snd)
699 #define DW_ADDR(attr) ((attr)->u.addr)
700 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
702 /* Blocks are a bunch of untyped bytes. */
709 #ifndef ATTR_ALLOC_CHUNK
710 #define ATTR_ALLOC_CHUNK 4
713 /* Allocate fields for structs, unions and enums in this size. */
714 #ifndef DW_FIELD_ALLOC_CHUNK
715 #define DW_FIELD_ALLOC_CHUNK 4
718 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
719 but this would require a corresponding change in unpack_field_as_long
721 static int bits_per_byte
= 8;
723 /* The routines that read and process dies for a C struct or C++ class
724 pass lists of data member fields and lists of member function fields
725 in an instance of a field_info structure, as defined below. */
728 /* List of data member and baseclasses fields. */
731 struct nextfield
*next
;
736 *fields
, *baseclasses
;
738 /* Number of fields (including baseclasses). */
741 /* Number of baseclasses. */
744 /* Set if the accesibility of one of the fields is not public. */
745 int non_public_fields
;
747 /* Member function fields array, entries are allocated in the order they
748 are encountered in the object file. */
751 struct nextfnfield
*next
;
752 struct fn_field fnfield
;
756 /* Member function fieldlist array, contains name of possibly overloaded
757 member function, number of overloaded member functions and a pointer
758 to the head of the member function field chain. */
763 struct nextfnfield
*head
;
767 /* Number of entries in the fnfieldlists array. */
770 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
771 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
772 struct typedef_field_list
774 struct typedef_field field
;
775 struct typedef_field_list
*next
;
778 unsigned typedef_field_list_count
;
781 /* One item on the queue of compilation units to read in full symbols
783 struct dwarf2_queue_item
785 struct dwarf2_per_cu_data
*per_cu
;
786 struct dwarf2_queue_item
*next
;
789 /* The current queue. */
790 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
792 /* Loaded secondary compilation units are kept in memory until they
793 have not been referenced for the processing of this many
794 compilation units. Set this to zero to disable caching. Cache
795 sizes of up to at least twenty will improve startup time for
796 typical inter-CU-reference binaries, at an obvious memory cost. */
797 static int dwarf2_max_cache_age
= 5;
799 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
800 struct cmd_list_element
*c
, const char *value
)
802 fprintf_filtered (file
, _("\
803 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
808 /* Various complaints about symbol reading that don't abort the process */
811 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
813 complaint (&symfile_complaints
,
814 _("statement list doesn't fit in .debug_line section"));
818 dwarf2_debug_line_missing_file_complaint (void)
820 complaint (&symfile_complaints
,
821 _(".debug_line section has line data without a file"));
825 dwarf2_debug_line_missing_end_sequence_complaint (void)
827 complaint (&symfile_complaints
,
828 _(".debug_line section has line program sequence without an end"));
832 dwarf2_complex_location_expr_complaint (void)
834 complaint (&symfile_complaints
, _("location expression too complex"));
838 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
841 complaint (&symfile_complaints
,
842 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
847 dwarf2_macros_too_long_complaint (void)
849 complaint (&symfile_complaints
,
850 _("macro info runs off end of `.debug_macinfo' section"));
854 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
856 complaint (&symfile_complaints
,
857 _("macro debug info contains a malformed macro definition:\n`%s'"),
862 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
864 complaint (&symfile_complaints
,
865 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
868 /* local function prototypes */
870 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
872 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
875 static void dwarf2_build_psymtabs_hard (struct objfile
*);
877 static void scan_partial_symbols (struct partial_die_info
*,
878 CORE_ADDR
*, CORE_ADDR
*,
879 int, struct dwarf2_cu
*);
881 static void add_partial_symbol (struct partial_die_info
*,
884 static void add_partial_namespace (struct partial_die_info
*pdi
,
885 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
886 int need_pc
, struct dwarf2_cu
*cu
);
888 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
889 CORE_ADDR
*highpc
, int need_pc
,
890 struct dwarf2_cu
*cu
);
892 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
893 struct dwarf2_cu
*cu
);
895 static void add_partial_subprogram (struct partial_die_info
*pdi
,
896 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
897 int need_pc
, struct dwarf2_cu
*cu
);
899 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
900 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
901 bfd
*abfd
, struct dwarf2_cu
*cu
);
903 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
905 static void psymtab_to_symtab_1 (struct partial_symtab
*);
907 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
909 static void dwarf2_free_abbrev_table (void *);
911 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
914 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
917 static struct partial_die_info
*load_partial_dies (bfd
*,
918 gdb_byte
*, gdb_byte
*,
919 int, struct dwarf2_cu
*);
921 static gdb_byte
*read_partial_die (struct partial_die_info
*,
922 struct abbrev_info
*abbrev
,
924 gdb_byte
*, gdb_byte
*,
927 static struct partial_die_info
*find_partial_die (unsigned int,
930 static void fixup_partial_die (struct partial_die_info
*,
933 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
934 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
936 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
937 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
939 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
941 static int read_1_signed_byte (bfd
*, gdb_byte
*);
943 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
945 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
947 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
949 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
952 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
954 static LONGEST read_checked_initial_length_and_offset
955 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
956 unsigned int *, unsigned int *);
958 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
961 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
963 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
965 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
967 static char *read_indirect_string (bfd
*, gdb_byte
*,
968 const struct comp_unit_head
*,
971 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
973 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
975 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
977 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
979 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
982 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
986 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
987 struct dwarf2_cu
*cu
);
989 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
991 static struct die_info
*die_specification (struct die_info
*die
,
992 struct dwarf2_cu
**);
994 static void free_line_header (struct line_header
*lh
);
996 static void add_file_name (struct line_header
*, char *, unsigned int,
997 unsigned int, unsigned int);
999 static struct line_header
*(dwarf_decode_line_header
1000 (unsigned int offset
,
1001 bfd
*abfd
, struct dwarf2_cu
*cu
));
1003 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
1004 struct dwarf2_cu
*, struct partial_symtab
*);
1006 static void dwarf2_start_subfile (char *, char *, char *);
1008 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1009 struct dwarf2_cu
*);
1011 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1012 struct dwarf2_cu
*, struct symbol
*);
1014 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1015 struct dwarf2_cu
*);
1017 static void dwarf2_const_value_attr (struct attribute
*attr
,
1020 struct obstack
*obstack
,
1021 struct dwarf2_cu
*cu
, long *value
,
1023 struct dwarf2_locexpr_baton
**baton
);
1025 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1027 static int need_gnat_info (struct dwarf2_cu
*);
1029 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
1031 static void set_descriptive_type (struct type
*, struct die_info
*,
1032 struct dwarf2_cu
*);
1034 static struct type
*die_containing_type (struct die_info
*,
1035 struct dwarf2_cu
*);
1037 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1038 struct dwarf2_cu
*);
1040 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1042 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1044 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1046 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1047 const char *suffix
, int physname
,
1048 struct dwarf2_cu
*cu
);
1050 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1052 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1054 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1056 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1058 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1059 struct dwarf2_cu
*, struct partial_symtab
*);
1061 static int dwarf2_get_pc_bounds (struct die_info
*,
1062 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1063 struct partial_symtab
*);
1065 static void get_scope_pc_bounds (struct die_info
*,
1066 CORE_ADDR
*, CORE_ADDR
*,
1067 struct dwarf2_cu
*);
1069 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1070 CORE_ADDR
, struct dwarf2_cu
*);
1072 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1073 struct dwarf2_cu
*);
1075 static void dwarf2_attach_fields_to_type (struct field_info
*,
1076 struct type
*, struct dwarf2_cu
*);
1078 static void dwarf2_add_member_fn (struct field_info
*,
1079 struct die_info
*, struct type
*,
1080 struct dwarf2_cu
*);
1082 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1083 struct type
*, struct dwarf2_cu
*);
1085 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1087 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1089 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1091 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1093 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1095 static struct type
*read_module_type (struct die_info
*die
,
1096 struct dwarf2_cu
*cu
);
1098 static const char *namespace_name (struct die_info
*die
,
1099 int *is_anonymous
, struct dwarf2_cu
*);
1101 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1103 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1105 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1106 struct dwarf2_cu
*);
1108 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1110 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1112 gdb_byte
**new_info_ptr
,
1113 struct die_info
*parent
);
1115 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1117 gdb_byte
**new_info_ptr
,
1118 struct die_info
*parent
);
1120 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1122 gdb_byte
**new_info_ptr
,
1123 struct die_info
*parent
);
1125 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1126 struct die_info
**, gdb_byte
*,
1129 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1131 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1134 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1136 static const char *dwarf2_full_name (char *name
,
1137 struct die_info
*die
,
1138 struct dwarf2_cu
*cu
);
1140 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1141 struct dwarf2_cu
**);
1143 static char *dwarf_tag_name (unsigned int);
1145 static char *dwarf_attr_name (unsigned int);
1147 static char *dwarf_form_name (unsigned int);
1149 static char *dwarf_bool_name (unsigned int);
1151 static char *dwarf_type_encoding_name (unsigned int);
1154 static char *dwarf_cfi_name (unsigned int);
1157 static struct die_info
*sibling_die (struct die_info
*);
1159 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1161 static void dump_die_for_error (struct die_info
*);
1163 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1166 /*static*/ void dump_die (struct die_info
*, int max_level
);
1168 static void store_in_ref_table (struct die_info
*,
1169 struct dwarf2_cu
*);
1171 static int is_ref_attr (struct attribute
*);
1173 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1175 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1177 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1179 struct dwarf2_cu
**);
1181 static struct die_info
*follow_die_ref (struct die_info
*,
1183 struct dwarf2_cu
**);
1185 static struct die_info
*follow_die_sig (struct die_info
*,
1187 struct dwarf2_cu
**);
1189 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1190 unsigned int offset
);
1192 static void read_signatured_type (struct objfile
*,
1193 struct signatured_type
*type_sig
);
1195 /* memory allocation interface */
1197 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1199 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1201 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1203 static void initialize_cu_func_list (struct dwarf2_cu
*);
1205 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1206 struct dwarf2_cu
*);
1208 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1209 char *, bfd
*, struct dwarf2_cu
*);
1211 static int attr_form_is_block (struct attribute
*);
1213 static int attr_form_is_section_offset (struct attribute
*);
1215 static int attr_form_is_constant (struct attribute
*);
1217 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1219 struct dwarf2_cu
*cu
);
1221 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1222 struct abbrev_info
*abbrev
,
1223 struct dwarf2_cu
*cu
);
1225 static void free_stack_comp_unit (void *);
1227 static hashval_t
partial_die_hash (const void *item
);
1229 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1231 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1232 (unsigned int offset
, struct objfile
*objfile
);
1234 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1235 (unsigned int offset
, struct objfile
*objfile
);
1237 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1239 static void free_one_comp_unit (void *);
1241 static void free_cached_comp_units (void *);
1243 static void age_cached_comp_units (void);
1245 static void free_one_cached_comp_unit (void *);
1247 static struct type
*set_die_type (struct die_info
*, struct type
*,
1248 struct dwarf2_cu
*);
1250 static void create_all_comp_units (struct objfile
*);
1252 static int create_debug_types_hash_table (struct objfile
*objfile
);
1254 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1257 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1259 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1260 struct dwarf2_per_cu_data
*);
1262 static void dwarf2_mark (struct dwarf2_cu
*);
1264 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1266 static struct type
*get_die_type_at_offset (unsigned int,
1267 struct dwarf2_per_cu_data
*per_cu
);
1269 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1271 static void dwarf2_release_queue (void *dummy
);
1273 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1274 struct objfile
*objfile
);
1276 static void process_queue (struct objfile
*objfile
);
1278 static void find_file_and_directory (struct die_info
*die
,
1279 struct dwarf2_cu
*cu
,
1280 char **name
, char **comp_dir
);
1282 static char *file_full_name (int file
, struct line_header
*lh
,
1283 const char *comp_dir
);
1285 static gdb_byte
*partial_read_comp_unit_head (struct comp_unit_head
*header
,
1288 unsigned int buffer_size
,
1291 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1292 struct dwarf2_cu
*cu
);
1294 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1298 /* Convert VALUE between big- and little-endian. */
1300 byte_swap (offset_type value
)
1304 result
= (value
& 0xff) << 24;
1305 result
|= (value
& 0xff00) << 8;
1306 result
|= (value
& 0xff0000) >> 8;
1307 result
|= (value
& 0xff000000) >> 24;
1311 #define MAYBE_SWAP(V) byte_swap (V)
1314 #define MAYBE_SWAP(V) (V)
1315 #endif /* WORDS_BIGENDIAN */
1317 /* The suffix for an index file. */
1318 #define INDEX_SUFFIX ".gdb-index"
1320 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1321 struct dwarf2_cu
*cu
);
1323 /* Try to locate the sections we need for DWARF 2 debugging
1324 information and return true if we have enough to do something. */
1327 dwarf2_has_info (struct objfile
*objfile
)
1329 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1330 if (!dwarf2_per_objfile
)
1332 /* Initialize per-objfile state. */
1333 struct dwarf2_per_objfile
*data
1334 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1336 memset (data
, 0, sizeof (*data
));
1337 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1338 dwarf2_per_objfile
= data
;
1340 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1341 dwarf2_per_objfile
->objfile
= objfile
;
1343 return (dwarf2_per_objfile
->info
.asection
!= NULL
1344 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1347 /* When loading sections, we can either look for ".<name>", or for
1348 * ".z<name>", which indicates a compressed section. */
1351 section_is_p (const char *section_name
, const char *name
)
1353 return (section_name
[0] == '.'
1354 && (strcmp (section_name
+ 1, name
) == 0
1355 || (section_name
[1] == 'z'
1356 && strcmp (section_name
+ 2, name
) == 0)));
1359 /* This function is mapped across the sections and remembers the
1360 offset and size of each of the debugging sections we are interested
1364 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1366 if (section_is_p (sectp
->name
, INFO_SECTION
))
1368 dwarf2_per_objfile
->info
.asection
= sectp
;
1369 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1371 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1373 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1374 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1376 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1378 dwarf2_per_objfile
->line
.asection
= sectp
;
1379 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1381 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1383 dwarf2_per_objfile
->loc
.asection
= sectp
;
1384 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1386 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1388 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1389 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1391 else if (section_is_p (sectp
->name
, STR_SECTION
))
1393 dwarf2_per_objfile
->str
.asection
= sectp
;
1394 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1396 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1398 dwarf2_per_objfile
->frame
.asection
= sectp
;
1399 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1401 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1403 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1405 if (aflag
& SEC_HAS_CONTENTS
)
1407 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1408 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1411 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1413 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1414 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1416 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1418 dwarf2_per_objfile
->types
.asection
= sectp
;
1419 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1421 else if (section_is_p (sectp
->name
, GDB_INDEX_SECTION
))
1423 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1424 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1427 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1428 && bfd_section_vma (abfd
, sectp
) == 0)
1429 dwarf2_per_objfile
->has_section_at_zero
= 1;
1432 /* Decompress a section that was compressed using zlib. Store the
1433 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1436 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1437 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1439 bfd
*abfd
= objfile
->obfd
;
1441 error (_("Support for zlib-compressed DWARF data (from '%s') "
1442 "is disabled in this copy of GDB"),
1443 bfd_get_filename (abfd
));
1445 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1446 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1447 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1448 bfd_size_type uncompressed_size
;
1449 gdb_byte
*uncompressed_buffer
;
1452 int header_size
= 12;
1454 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1455 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1456 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1457 bfd_get_filename (abfd
));
1459 /* Read the zlib header. In this case, it should be "ZLIB" followed
1460 by the uncompressed section size, 8 bytes in big-endian order. */
1461 if (compressed_size
< header_size
1462 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1463 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1464 bfd_get_filename (abfd
));
1465 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1466 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1467 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1468 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1469 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1470 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1471 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1472 uncompressed_size
+= compressed_buffer
[11];
1474 /* It is possible the section consists of several compressed
1475 buffers concatenated together, so we uncompress in a loop. */
1479 strm
.avail_in
= compressed_size
- header_size
;
1480 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1481 strm
.avail_out
= uncompressed_size
;
1482 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1484 rc
= inflateInit (&strm
);
1485 while (strm
.avail_in
> 0)
1488 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1489 bfd_get_filename (abfd
), rc
);
1490 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1491 + (uncompressed_size
- strm
.avail_out
));
1492 rc
= inflate (&strm
, Z_FINISH
);
1493 if (rc
!= Z_STREAM_END
)
1494 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1495 bfd_get_filename (abfd
), rc
);
1496 rc
= inflateReset (&strm
);
1498 rc
= inflateEnd (&strm
);
1500 || strm
.avail_out
!= 0)
1501 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1502 bfd_get_filename (abfd
), rc
);
1504 do_cleanups (cleanup
);
1505 *outbuf
= uncompressed_buffer
;
1506 *outsize
= uncompressed_size
;
1510 /* Read the contents of the section SECTP from object file specified by
1511 OBJFILE, store info about the section into INFO.
1512 If the section is compressed, uncompress it before returning. */
1515 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1517 bfd
*abfd
= objfile
->obfd
;
1518 asection
*sectp
= info
->asection
;
1519 gdb_byte
*buf
, *retbuf
;
1520 unsigned char header
[4];
1524 info
->buffer
= NULL
;
1525 info
->was_mmapped
= 0;
1528 if (info
->asection
== NULL
|| info
->size
== 0)
1531 /* Check if the file has a 4-byte header indicating compression. */
1532 if (info
->size
> sizeof (header
)
1533 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1534 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1536 /* Upon decompression, update the buffer and its size. */
1537 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1539 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1547 pagesize
= getpagesize ();
1549 /* Only try to mmap sections which are large enough: we don't want to
1550 waste space due to fragmentation. Also, only try mmap for sections
1551 without relocations. */
1553 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1555 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1556 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1557 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1558 MAP_PRIVATE
, pg_offset
);
1560 if (retbuf
!= MAP_FAILED
)
1562 info
->was_mmapped
= 1;
1563 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1564 #if HAVE_POSIX_MADVISE
1565 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1572 /* If we get here, we are a normal, not-compressed section. */
1574 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1576 /* When debugging .o files, we may need to apply relocations; see
1577 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1578 We never compress sections in .o files, so we only need to
1579 try this when the section is not compressed. */
1580 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1583 info
->buffer
= retbuf
;
1587 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1588 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1589 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1590 bfd_get_filename (abfd
));
1593 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1597 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1598 asection
**sectp
, gdb_byte
**bufp
,
1599 bfd_size_type
*sizep
)
1601 struct dwarf2_per_objfile
*data
1602 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1603 struct dwarf2_section_info
*info
;
1605 /* We may see an objfile without any DWARF, in which case we just
1614 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1615 info
= &data
->eh_frame
;
1616 else if (section_is_p (section_name
, FRAME_SECTION
))
1617 info
= &data
->frame
;
1619 gdb_assert_not_reached ("unexpected section");
1621 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1622 /* We haven't read this section in yet. Do it now. */
1623 dwarf2_read_section (objfile
, info
);
1625 *sectp
= info
->asection
;
1626 *bufp
= info
->buffer
;
1627 *sizep
= info
->size
;
1632 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1635 dw2_do_instantiate_symtab (struct objfile
*objfile
,
1636 struct dwarf2_per_cu_data
*per_cu
)
1638 struct cleanup
*back_to
;
1640 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1642 queue_comp_unit (per_cu
, objfile
);
1644 if (per_cu
->from_debug_types
)
1645 read_signatured_type_at_offset (objfile
, per_cu
->offset
);
1647 load_full_comp_unit (per_cu
, objfile
);
1649 process_queue (objfile
);
1651 /* Age the cache, releasing compilation units that have not
1652 been used recently. */
1653 age_cached_comp_units ();
1655 do_cleanups (back_to
);
1658 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1659 the objfile from which this CU came. Returns the resulting symbol
1661 static struct symtab
*
1662 dw2_instantiate_symtab (struct objfile
*objfile
,
1663 struct dwarf2_per_cu_data
*per_cu
)
1665 if (!per_cu
->v
.quick
->symtab
)
1667 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1668 increment_reading_symtab ();
1669 dw2_do_instantiate_symtab (objfile
, per_cu
);
1670 do_cleanups (back_to
);
1672 return per_cu
->v
.quick
->symtab
;
1675 /* Return the CU given its index. */
1676 static struct dwarf2_per_cu_data
*
1677 dw2_get_cu (int index
)
1679 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1681 index
-= dwarf2_per_objfile
->n_comp_units
;
1682 return dwarf2_per_objfile
->type_comp_units
[index
];
1684 return dwarf2_per_objfile
->all_comp_units
[index
];
1687 /* A helper function that knows how to read a 64-bit value in a way
1688 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1691 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1693 if (sizeof (ULONGEST
) < 8)
1697 /* Ignore the upper 4 bytes if they are all zero. */
1698 for (i
= 0; i
< 4; ++i
)
1699 if (bytes
[i
+ 4] != 0)
1702 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1705 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1709 /* Read the CU list from the mapped index, and use it to create all
1710 the CU objects for this objfile. Return 0 if something went wrong,
1711 1 if everything went ok. */
1713 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1714 offset_type cu_list_elements
)
1718 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1719 dwarf2_per_objfile
->all_comp_units
1720 = obstack_alloc (&objfile
->objfile_obstack
,
1721 dwarf2_per_objfile
->n_comp_units
1722 * sizeof (struct dwarf2_per_cu_data
*));
1724 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1726 struct dwarf2_per_cu_data
*the_cu
;
1727 ULONGEST offset
, length
;
1729 if (!extract_cu_value (cu_list
, &offset
)
1730 || !extract_cu_value (cu_list
+ 8, &length
))
1734 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1735 struct dwarf2_per_cu_data
);
1736 the_cu
->offset
= offset
;
1737 the_cu
->length
= length
;
1738 the_cu
->objfile
= objfile
;
1739 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1740 struct dwarf2_per_cu_quick_data
);
1741 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1747 /* Create the signatured type hash table from the index. */
1750 create_signatured_type_table_from_index (struct objfile
*objfile
,
1751 const gdb_byte
*bytes
,
1752 offset_type elements
)
1755 htab_t sig_types_hash
;
1757 dwarf2_per_objfile
->n_type_comp_units
= elements
/ 3;
1758 dwarf2_per_objfile
->type_comp_units
1759 = obstack_alloc (&objfile
->objfile_obstack
,
1760 dwarf2_per_objfile
->n_type_comp_units
1761 * sizeof (struct dwarf2_per_cu_data
*));
1763 sig_types_hash
= allocate_signatured_type_table (objfile
);
1765 for (i
= 0; i
< elements
; i
+= 3)
1767 struct signatured_type
*type_sig
;
1768 ULONGEST offset
, type_offset
, signature
;
1771 if (!extract_cu_value (bytes
, &offset
)
1772 || !extract_cu_value (bytes
+ 8, &type_offset
))
1774 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1777 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1778 struct signatured_type
);
1779 type_sig
->signature
= signature
;
1780 type_sig
->offset
= offset
;
1781 type_sig
->type_offset
= type_offset
;
1782 type_sig
->per_cu
.from_debug_types
= 1;
1783 type_sig
->per_cu
.offset
= offset
;
1784 type_sig
->per_cu
.objfile
= objfile
;
1785 type_sig
->per_cu
.v
.quick
1786 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1787 struct dwarf2_per_cu_quick_data
);
1789 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1792 dwarf2_per_objfile
->type_comp_units
[i
/ 3] = &type_sig
->per_cu
;
1795 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1800 /* Read the address map data from the mapped index, and use it to
1801 populate the objfile's psymtabs_addrmap. */
1803 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1805 const gdb_byte
*iter
, *end
;
1806 struct obstack temp_obstack
;
1807 struct addrmap
*mutable_map
;
1808 struct cleanup
*cleanup
;
1811 obstack_init (&temp_obstack
);
1812 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1813 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1815 iter
= index
->address_table
;
1816 end
= iter
+ index
->address_table_size
;
1818 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1822 ULONGEST hi
, lo
, cu_index
;
1823 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1825 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1827 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1830 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1831 dw2_get_cu (cu_index
));
1834 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1835 &objfile
->objfile_obstack
);
1836 do_cleanups (cleanup
);
1839 /* The hash function for strings in the mapped index. This is the
1840 same as the hashtab.c hash function, but we keep a separate copy to
1841 maintain control over the implementation. This is necessary
1842 because the hash function is tied to the format of the mapped index
1845 mapped_index_string_hash (const void *p
)
1847 const unsigned char *str
= (const unsigned char *) p
;
1851 while ((c
= *str
++) != 0)
1852 r
= r
* 67 + c
- 113;
1857 /* Find a slot in the mapped index INDEX for the object named NAME.
1858 If NAME is found, set *VEC_OUT to point to the CU vector in the
1859 constant pool and return 1. If NAME cannot be found, return 0. */
1861 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
1862 offset_type
**vec_out
)
1864 offset_type hash
= mapped_index_string_hash (name
);
1865 offset_type slot
, step
;
1867 slot
= hash
& (index
->index_table_slots
- 1);
1868 step
= ((hash
* 17) & (index
->index_table_slots
- 1)) | 1;
1872 /* Convert a slot number to an offset into the table. */
1873 offset_type i
= 2 * slot
;
1875 if (index
->index_table
[i
] == 0 && index
->index_table
[i
+ 1] == 0)
1878 str
= index
->constant_pool
+ MAYBE_SWAP (index
->index_table
[i
]);
1879 if (!strcmp (name
, str
))
1881 *vec_out
= (offset_type
*) (index
->constant_pool
1882 + MAYBE_SWAP (index
->index_table
[i
+ 1]));
1886 slot
= (slot
+ step
) & (index
->index_table_slots
- 1);
1890 /* Read the index file. If everything went ok, initialize the "quick"
1891 elements of all the CUs and return 1. Otherwise, return 0. */
1893 dwarf2_read_index (struct objfile
*objfile
)
1896 struct mapped_index
*map
;
1897 offset_type
*metadata
;
1898 const gdb_byte
*cu_list
;
1899 const gdb_byte
*types_list
= NULL
;
1900 offset_type version
, cu_list_elements
;
1901 offset_type types_list_elements
= 0;
1904 if (dwarf2_per_objfile
->gdb_index
.asection
== NULL
1905 || dwarf2_per_objfile
->gdb_index
.size
== 0)
1907 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
1909 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
1910 /* Version check. */
1911 version
= MAYBE_SWAP (*(offset_type
*) addr
);
1914 /* Index version 1 neglected to account for .debug_types. So,
1915 if we see .debug_types, we cannot use this index. */
1916 if (dwarf2_per_objfile
->types
.asection
!= NULL
1917 && dwarf2_per_objfile
->types
.size
!= 0)
1920 else if (version
!= 2)
1923 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
1924 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
1926 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
1929 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1930 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
1936 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1937 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
1938 - MAYBE_SWAP (metadata
[i
]))
1943 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
1944 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
1945 - MAYBE_SWAP (metadata
[i
]));
1948 map
->index_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
1949 map
->index_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
1950 - MAYBE_SWAP (metadata
[i
]))
1951 / (2 * sizeof (offset_type
)));
1954 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
1956 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
1960 && types_list_elements
1961 && !create_signatured_type_table_from_index (objfile
, types_list
,
1962 types_list_elements
))
1965 create_addrmap_from_index (objfile
, map
);
1967 dwarf2_per_objfile
->index_table
= map
;
1968 dwarf2_per_objfile
->using_index
= 1;
1973 /* A helper for the "quick" functions which sets the global
1974 dwarf2_per_objfile according to OBJFILE. */
1976 dw2_setup (struct objfile
*objfile
)
1978 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1979 gdb_assert (dwarf2_per_objfile
);
1982 /* A helper for the "quick" functions which attempts to read the line
1983 table for THIS_CU. */
1985 dw2_require_line_header (struct objfile
*objfile
,
1986 struct dwarf2_per_cu_data
*this_cu
)
1988 bfd
*abfd
= objfile
->obfd
;
1989 struct line_header
*lh
= NULL
;
1990 struct attribute
*attr
;
1991 struct cleanup
*cleanups
;
1992 struct die_info
*comp_unit_die
;
1993 struct dwarf2_section_info
* sec
;
1994 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
1995 int has_children
, i
;
1996 struct dwarf2_cu cu
;
1997 unsigned int bytes_read
, buffer_size
;
1998 struct die_reader_specs reader_specs
;
1999 char *name
, *comp_dir
;
2001 if (this_cu
->v
.quick
->read_lines
)
2003 this_cu
->v
.quick
->read_lines
= 1;
2005 memset (&cu
, 0, sizeof (cu
));
2006 cu
.objfile
= objfile
;
2007 obstack_init (&cu
.comp_unit_obstack
);
2009 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2011 if (this_cu
->from_debug_types
)
2012 sec
= &dwarf2_per_objfile
->types
;
2014 sec
= &dwarf2_per_objfile
->info
;
2015 dwarf2_read_section (objfile
, sec
);
2016 buffer_size
= sec
->size
;
2017 buffer
= sec
->buffer
;
2018 info_ptr
= buffer
+ this_cu
->offset
;
2019 beg_of_comp_unit
= info_ptr
;
2021 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2022 buffer
, buffer_size
,
2025 /* Complete the cu_header. */
2026 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2027 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2030 cu
.per_cu
= this_cu
;
2032 dwarf2_read_abbrevs (abfd
, &cu
);
2033 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2035 if (this_cu
->from_debug_types
)
2036 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2037 init_cu_die_reader (&reader_specs
, &cu
);
2038 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2041 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2044 unsigned int line_offset
= DW_UNSND (attr
);
2045 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2049 do_cleanups (cleanups
);
2053 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2055 this_cu
->v
.quick
->lines
= lh
;
2057 this_cu
->v
.quick
->file_names
2058 = obstack_alloc (&objfile
->objfile_obstack
,
2059 lh
->num_file_names
* sizeof (char *));
2060 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2061 this_cu
->v
.quick
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2063 do_cleanups (cleanups
);
2066 /* A helper for the "quick" functions which computes and caches the
2067 real path for a given file name from the line table.
2068 dw2_require_line_header must have been called before this is
2071 dw2_require_full_path (struct objfile
*objfile
,
2072 struct dwarf2_per_cu_data
*per_cu
,
2075 if (!per_cu
->v
.quick
->full_names
)
2076 per_cu
->v
.quick
->full_names
2077 = OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2078 per_cu
->v
.quick
->lines
->num_file_names
,
2081 if (!per_cu
->v
.quick
->full_names
[index
])
2082 per_cu
->v
.quick
->full_names
[index
]
2083 = gdb_realpath (per_cu
->v
.quick
->file_names
[index
]);
2085 return per_cu
->v
.quick
->full_names
[index
];
2088 static struct symtab
*
2089 dw2_find_last_source_symtab (struct objfile
*objfile
)
2092 dw2_setup (objfile
);
2093 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2094 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2098 dw2_forget_cached_source_info (struct objfile
*objfile
)
2102 dw2_setup (objfile
);
2103 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2104 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2106 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2108 if (per_cu
->v
.quick
->full_names
)
2112 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2113 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
2119 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2120 const char *full_path
, const char *real_path
,
2121 struct symtab
**result
)
2124 int check_basename
= lbasename (name
) == name
;
2125 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2127 dw2_setup (objfile
);
2128 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2129 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2132 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2134 if (per_cu
->v
.quick
->symtab
)
2137 dw2_require_line_header (objfile
, per_cu
);
2138 if (!per_cu
->v
.quick
->lines
)
2141 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2143 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2145 if (FILENAME_CMP (name
, this_name
) == 0)
2147 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2151 if (check_basename
&& ! base_cu
2152 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2155 if (full_path
!= NULL
)
2157 const char *this_full_name
= dw2_require_full_path (objfile
,
2161 && FILENAME_CMP (full_path
, this_full_name
) == 0)
2163 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2168 if (real_path
!= NULL
)
2170 const char *this_full_name
= dw2_require_full_path (objfile
,
2173 if (this_full_name
!= NULL
)
2175 char *rp
= gdb_realpath (this_full_name
);
2176 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
2179 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2190 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2197 static struct symtab
*
2198 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2199 const char *name
, domain_enum domain
)
2201 /* We do all the work in the expand_one_symtab_matching hook
2206 /* A helper function that expands all symtabs that hold an object
2209 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2211 dw2_setup (objfile
);
2213 if (dwarf2_per_objfile
->index_table
)
2217 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2220 offset_type i
, len
= MAYBE_SWAP (*vec
);
2221 for (i
= 0; i
< len
; ++i
)
2223 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2224 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2226 dw2_instantiate_symtab (objfile
, per_cu
);
2232 static struct symbol
*
2233 dw2_expand_one_symtab_matching (struct objfile
*objfile
,
2234 int kind
, const char *name
,
2236 struct symbol
*(*matcher
) (struct symtab
*,
2243 dw2_setup (objfile
);
2245 if (dwarf2_per_objfile
->index_table
)
2249 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2252 offset_type i
, len
= MAYBE_SWAP (*vec
);
2253 for (i
= 0; i
< len
; ++i
)
2255 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2256 struct dwarf2_per_cu_data
*cu
= dw2_get_cu (cu_index
);
2257 struct symtab
*symtab
;
2260 if (cu
->v
.quick
->symtab
)
2263 symtab
= dw2_instantiate_symtab (objfile
, cu
);
2264 sym
= matcher (symtab
, kind
, name
, domain
, data
);
2275 dw2_print_stats (struct objfile
*objfile
)
2279 dw2_setup (objfile
);
2281 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2282 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2284 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2286 if (!per_cu
->v
.quick
->symtab
)
2289 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2293 dw2_dump (struct objfile
*objfile
)
2295 /* Nothing worth printing. */
2299 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2300 struct section_offsets
*delta
)
2302 /* There's nothing to relocate here. */
2306 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2307 const char *func_name
)
2309 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2313 dw2_expand_all_symtabs (struct objfile
*objfile
)
2317 dw2_setup (objfile
);
2319 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2320 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2322 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2324 dw2_instantiate_symtab (objfile
, per_cu
);
2329 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2330 const char *filename
)
2334 dw2_setup (objfile
);
2335 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2336 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2339 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2341 if (per_cu
->v
.quick
->symtab
)
2344 dw2_require_line_header (objfile
, per_cu
);
2345 if (!per_cu
->v
.quick
->lines
)
2348 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2350 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2351 if (strcmp (this_name
, filename
) == 0)
2353 dw2_instantiate_symtab (objfile
, per_cu
);
2361 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2363 struct dwarf2_per_cu_data
*per_cu
;
2366 dw2_setup (objfile
);
2368 if (!dwarf2_per_objfile
->index_table
)
2371 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2375 /* Note that this just looks at the very first one named NAME -- but
2376 actually we are looking for a function. find_main_filename
2377 should be rewritten so that it doesn't require a custom hook. It
2378 could just use the ordinary symbol tables. */
2379 /* vec[0] is the length, which must always be >0. */
2380 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2382 dw2_require_line_header (objfile
, per_cu
);
2383 if (!per_cu
->v
.quick
->lines
)
2386 return per_cu
->v
.quick
->file_names
[per_cu
->v
.quick
->lines
->num_file_names
- 1];
2390 dw2_map_ada_symtabs (struct objfile
*objfile
,
2391 int (*wild_match
) (const char *, int, const char *),
2392 int (*is_name_suffix
) (const char *),
2393 void (*callback
) (struct objfile
*,
2394 struct symtab
*, void *),
2395 const char *name
, int global
,
2396 domain_enum
namespace, int wild
,
2399 /* For now, we don't support Ada, so this function can't be
2401 internal_error (__FILE__
, __LINE__
,
2402 _("map_ada_symtabs called via index method"));
2406 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2407 int (*file_matcher
) (const char *, void *),
2408 int (*name_matcher
) (const char *, void *),
2415 dw2_setup (objfile
);
2416 if (!dwarf2_per_objfile
->index_table
)
2419 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2420 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2423 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2425 per_cu
->v
.quick
->mark
= 0;
2426 if (per_cu
->v
.quick
->symtab
)
2429 dw2_require_line_header (objfile
, per_cu
);
2430 if (!per_cu
->v
.quick
->lines
)
2433 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2435 if (file_matcher (per_cu
->v
.quick
->file_names
[j
], data
))
2437 per_cu
->v
.quick
->mark
= 1;
2444 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2447 offset_type idx
= 2 * iter
;
2449 offset_type
*vec
, vec_len
, vec_idx
;
2451 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2452 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2455 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2456 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2458 if (! (*name_matcher
) (name
, data
))
2461 /* The name was matched, now expand corresponding CUs that were
2463 vec
= (offset_type
*) (dwarf2_per_objfile
->index_table
->constant_pool
2464 + dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1]);
2465 vec_len
= MAYBE_SWAP (vec
[0]);
2466 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2468 struct dwarf2_per_cu_data
*per_cu
;
2470 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2471 if (per_cu
->v
.quick
->mark
)
2472 dw2_instantiate_symtab (objfile
, per_cu
);
2477 static struct symtab
*
2478 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2479 struct minimal_symbol
*msymbol
,
2481 struct obj_section
*section
,
2484 struct dwarf2_per_cu_data
*data
;
2486 dw2_setup (objfile
);
2488 if (!objfile
->psymtabs_addrmap
)
2491 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2495 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2496 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2497 paddress (get_objfile_arch (objfile
), pc
));
2499 return dw2_instantiate_symtab (objfile
, data
);
2503 dw2_map_symbol_names (struct objfile
*objfile
,
2504 void (*fun
) (const char *, void *),
2508 dw2_setup (objfile
);
2510 if (!dwarf2_per_objfile
->index_table
)
2514 iter
< dwarf2_per_objfile
->index_table
->index_table_slots
;
2517 offset_type idx
= 2 * iter
;
2519 offset_type
*vec
, vec_len
, vec_idx
;
2521 if (dwarf2_per_objfile
->index_table
->index_table
[idx
] == 0
2522 && dwarf2_per_objfile
->index_table
->index_table
[idx
+ 1] == 0)
2525 name
= (dwarf2_per_objfile
->index_table
->constant_pool
2526 + dwarf2_per_objfile
->index_table
->index_table
[idx
]);
2528 (*fun
) (name
, data
);
2533 dw2_map_symbol_filenames (struct objfile
*objfile
,
2534 void (*fun
) (const char *, const char *, void *),
2539 dw2_setup (objfile
);
2540 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2541 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2544 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2546 if (per_cu
->v
.quick
->symtab
)
2549 dw2_require_line_header (objfile
, per_cu
);
2550 if (!per_cu
->v
.quick
->lines
)
2553 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2555 const char *this_full_name
= dw2_require_full_path (objfile
, per_cu
,
2557 (*fun
) (per_cu
->v
.quick
->file_names
[j
], this_full_name
, data
);
2563 dw2_has_symbols (struct objfile
*objfile
)
2568 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2571 dw2_find_last_source_symtab
,
2572 dw2_forget_cached_source_info
,
2575 dw2_expand_one_symtab_matching
,
2579 dw2_expand_symtabs_for_function
,
2580 dw2_expand_all_symtabs
,
2581 dw2_expand_symtabs_with_filename
,
2582 dw2_find_symbol_file
,
2583 dw2_map_ada_symtabs
,
2584 dw2_expand_symtabs_matching
,
2585 dw2_find_pc_sect_symtab
,
2586 dw2_map_symbol_names
,
2587 dw2_map_symbol_filenames
2590 /* Initialize for reading DWARF for this objfile. Return 0 if this
2591 file will use psymtabs, or 1 if using the GNU index. */
2594 dwarf2_initialize_objfile (struct objfile
*objfile
)
2596 /* If we're about to read full symbols, don't bother with the
2597 indices. In this case we also don't care if some other debug
2598 format is making psymtabs, because they are all about to be
2600 if ((objfile
->flags
& OBJF_READNOW
))
2604 dwarf2_per_objfile
->using_index
= 1;
2605 create_all_comp_units (objfile
);
2606 create_debug_types_hash_table (objfile
);
2608 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2609 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2611 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2613 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2614 struct dwarf2_per_cu_quick_data
);
2617 /* Return 1 so that gdb sees the "quick" functions. However,
2618 these functions will be no-ops because we will have expanded
2623 if (dwarf2_read_index (objfile
))
2626 dwarf2_build_psymtabs (objfile
);
2632 /* Build a partial symbol table. */
2635 dwarf2_build_psymtabs (struct objfile
*objfile
)
2637 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2639 init_psymbol_list (objfile
, 1024);
2642 dwarf2_build_psymtabs_hard (objfile
);
2645 /* Return TRUE if OFFSET is within CU_HEADER. */
2648 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2650 unsigned int bottom
= cu_header
->offset
;
2651 unsigned int top
= (cu_header
->offset
2653 + cu_header
->initial_length_size
);
2655 return (offset
>= bottom
&& offset
< top
);
2658 /* Read in the comp unit header information from the debug_info at info_ptr.
2659 NOTE: This leaves members offset, first_die_offset to be filled in
2663 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2664 gdb_byte
*info_ptr
, bfd
*abfd
)
2667 unsigned int bytes_read
;
2669 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2670 cu_header
->initial_length_size
= bytes_read
;
2671 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2672 info_ptr
+= bytes_read
;
2673 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2675 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2677 info_ptr
+= bytes_read
;
2678 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2680 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2681 if (signed_addr
< 0)
2682 internal_error (__FILE__
, __LINE__
,
2683 _("read_comp_unit_head: dwarf from non elf file"));
2684 cu_header
->signed_addr_p
= signed_addr
;
2690 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2691 gdb_byte
*buffer
, unsigned int buffer_size
,
2694 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2696 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2698 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2699 error (_("Dwarf Error: wrong version in compilation unit header "
2700 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2701 bfd_get_filename (abfd
));
2703 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2704 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2705 "(offset 0x%lx + 6) [in module %s]"),
2706 (long) header
->abbrev_offset
,
2707 (long) (beg_of_comp_unit
- buffer
),
2708 bfd_get_filename (abfd
));
2710 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2711 > buffer
+ buffer_size
)
2712 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2713 "(offset 0x%lx + 0) [in module %s]"),
2714 (long) header
->length
,
2715 (long) (beg_of_comp_unit
- buffer
),
2716 bfd_get_filename (abfd
));
2721 /* Read in the types comp unit header information from .debug_types entry at
2722 types_ptr. The result is a pointer to one past the end of the header. */
2725 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2726 ULONGEST
*signature
,
2727 gdb_byte
*types_ptr
, bfd
*abfd
)
2729 gdb_byte
*initial_types_ptr
= types_ptr
;
2731 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2732 &dwarf2_per_objfile
->types
);
2733 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2735 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2737 *signature
= read_8_bytes (abfd
, types_ptr
);
2739 types_ptr
+= cu_header
->offset_size
;
2740 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2745 /* Allocate a new partial symtab for file named NAME and mark this new
2746 partial symtab as being an include of PST. */
2749 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2750 struct objfile
*objfile
)
2752 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2754 subpst
->section_offsets
= pst
->section_offsets
;
2755 subpst
->textlow
= 0;
2756 subpst
->texthigh
= 0;
2758 subpst
->dependencies
= (struct partial_symtab
**)
2759 obstack_alloc (&objfile
->objfile_obstack
,
2760 sizeof (struct partial_symtab
*));
2761 subpst
->dependencies
[0] = pst
;
2762 subpst
->number_of_dependencies
= 1;
2764 subpst
->globals_offset
= 0;
2765 subpst
->n_global_syms
= 0;
2766 subpst
->statics_offset
= 0;
2767 subpst
->n_static_syms
= 0;
2768 subpst
->symtab
= NULL
;
2769 subpst
->read_symtab
= pst
->read_symtab
;
2772 /* No private part is necessary for include psymtabs. This property
2773 can be used to differentiate between such include psymtabs and
2774 the regular ones. */
2775 subpst
->read_symtab_private
= NULL
;
2778 /* Read the Line Number Program data and extract the list of files
2779 included by the source file represented by PST. Build an include
2780 partial symtab for each of these included files. */
2783 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2784 struct die_info
*die
,
2785 struct partial_symtab
*pst
)
2787 struct objfile
*objfile
= cu
->objfile
;
2788 bfd
*abfd
= objfile
->obfd
;
2789 struct line_header
*lh
= NULL
;
2790 struct attribute
*attr
;
2792 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2795 unsigned int line_offset
= DW_UNSND (attr
);
2797 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2800 return; /* No linetable, so no includes. */
2802 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2803 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2805 free_line_header (lh
);
2809 hash_type_signature (const void *item
)
2811 const struct signatured_type
*type_sig
= item
;
2813 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2814 return type_sig
->signature
;
2818 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2820 const struct signatured_type
*lhs
= item_lhs
;
2821 const struct signatured_type
*rhs
= item_rhs
;
2823 return lhs
->signature
== rhs
->signature
;
2826 /* Allocate a hash table for signatured types. */
2829 allocate_signatured_type_table (struct objfile
*objfile
)
2831 return htab_create_alloc_ex (41,
2832 hash_type_signature
,
2835 &objfile
->objfile_obstack
,
2836 hashtab_obstack_allocate
,
2837 dummy_obstack_deallocate
);
2840 /* A helper function to add a signatured type CU to a list. */
2843 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2845 struct signatured_type
*sigt
= *slot
;
2846 struct dwarf2_per_cu_data
***datap
= datum
;
2848 **datap
= &sigt
->per_cu
;
2854 /* Create the hash table of all entries in the .debug_types section.
2855 The result is zero if there is an error (e.g. missing .debug_types section),
2856 otherwise non-zero. */
2859 create_debug_types_hash_table (struct objfile
*objfile
)
2863 struct dwarf2_per_cu_data
**iter
;
2865 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2866 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2868 if (info_ptr
== NULL
)
2870 dwarf2_per_objfile
->signatured_types
= NULL
;
2874 types_htab
= allocate_signatured_type_table (objfile
);
2876 if (dwarf2_die_debug
)
2877 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
2879 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2881 unsigned int offset
;
2882 unsigned int offset_size
;
2883 unsigned int type_offset
;
2884 unsigned int length
, initial_length_size
;
2885 unsigned short version
;
2887 struct signatured_type
*type_sig
;
2889 gdb_byte
*ptr
= info_ptr
;
2891 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
2893 /* We need to read the type's signature in order to build the hash
2894 table, but we don't need to read anything else just yet. */
2896 /* Sanity check to ensure entire cu is present. */
2897 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
2898 if (ptr
+ length
+ initial_length_size
2899 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2901 complaint (&symfile_complaints
,
2902 _("debug type entry runs off end of `.debug_types' section, ignored"));
2906 offset_size
= initial_length_size
== 4 ? 4 : 8;
2907 ptr
+= initial_length_size
;
2908 version
= bfd_get_16 (objfile
->obfd
, ptr
);
2910 ptr
+= offset_size
; /* abbrev offset */
2911 ptr
+= 1; /* address size */
2912 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
2914 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
2916 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
2917 memset (type_sig
, 0, sizeof (*type_sig
));
2918 type_sig
->signature
= signature
;
2919 type_sig
->offset
= offset
;
2920 type_sig
->type_offset
= type_offset
;
2921 type_sig
->per_cu
.objfile
= objfile
;
2922 type_sig
->per_cu
.from_debug_types
= 1;
2924 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
2925 gdb_assert (slot
!= NULL
);
2928 if (dwarf2_die_debug
)
2929 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
2930 offset
, phex (signature
, sizeof (signature
)));
2932 info_ptr
= info_ptr
+ initial_length_size
+ length
;
2935 dwarf2_per_objfile
->signatured_types
= types_htab
;
2937 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
2938 dwarf2_per_objfile
->type_comp_units
2939 = obstack_alloc (&objfile
->objfile_obstack
,
2940 dwarf2_per_objfile
->n_type_comp_units
2941 * sizeof (struct dwarf2_per_cu_data
*));
2942 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
2943 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
2944 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
2945 == dwarf2_per_objfile
->n_type_comp_units
);
2950 /* Lookup a signature based type.
2951 Returns NULL if SIG is not present in the table. */
2953 static struct signatured_type
*
2954 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
2956 struct signatured_type find_entry
, *entry
;
2958 if (dwarf2_per_objfile
->signatured_types
== NULL
)
2960 complaint (&symfile_complaints
,
2961 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2965 find_entry
.signature
= sig
;
2966 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
2970 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2973 init_cu_die_reader (struct die_reader_specs
*reader
,
2974 struct dwarf2_cu
*cu
)
2976 reader
->abfd
= cu
->objfile
->obfd
;
2978 if (cu
->per_cu
->from_debug_types
)
2980 gdb_assert (dwarf2_per_objfile
->types
.readin
);
2981 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
2985 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2986 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
2990 /* Find the base address of the compilation unit for range lists and
2991 location lists. It will normally be specified by DW_AT_low_pc.
2992 In DWARF-3 draft 4, the base address could be overridden by
2993 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2994 compilation units with discontinuous ranges. */
2997 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
2999 struct attribute
*attr
;
3002 cu
->base_address
= 0;
3004 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3007 cu
->base_address
= DW_ADDR (attr
);
3012 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3015 cu
->base_address
= DW_ADDR (attr
);
3021 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3022 to combine the common parts.
3023 Process a compilation unit for a psymtab.
3024 BUFFER is a pointer to the beginning of the dwarf section buffer,
3025 either .debug_info or debug_types.
3026 INFO_PTR is a pointer to the start of the CU.
3027 Returns a pointer to the next CU. */
3030 process_psymtab_comp_unit (struct objfile
*objfile
,
3031 struct dwarf2_per_cu_data
*this_cu
,
3032 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
3033 unsigned int buffer_size
)
3035 bfd
*abfd
= objfile
->obfd
;
3036 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3037 struct die_info
*comp_unit_die
;
3038 struct partial_symtab
*pst
;
3040 struct cleanup
*back_to_inner
;
3041 struct dwarf2_cu cu
;
3042 int has_children
, has_pc_info
;
3043 struct attribute
*attr
;
3044 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3045 struct die_reader_specs reader_specs
;
3047 memset (&cu
, 0, sizeof (cu
));
3048 cu
.objfile
= objfile
;
3049 obstack_init (&cu
.comp_unit_obstack
);
3051 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3053 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3054 buffer
, buffer_size
,
3057 /* Complete the cu_header. */
3058 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3059 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3061 cu
.list_in_scope
= &file_symbols
;
3063 /* If this compilation unit was already read in, free the
3064 cached copy in order to read it in again. This is
3065 necessary because we skipped some symbols when we first
3066 read in the compilation unit (see load_partial_dies).
3067 This problem could be avoided, but the benefit is
3069 if (this_cu
->cu
!= NULL
)
3070 free_one_cached_comp_unit (this_cu
->cu
);
3072 /* Note that this is a pointer to our stack frame, being
3073 added to a global data structure. It will be cleaned up
3074 in free_stack_comp_unit when we finish with this
3075 compilation unit. */
3077 cu
.per_cu
= this_cu
;
3079 /* Read the abbrevs for this compilation unit into a table. */
3080 dwarf2_read_abbrevs (abfd
, &cu
);
3081 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3083 /* Read the compilation unit die. */
3084 if (this_cu
->from_debug_types
)
3085 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3086 init_cu_die_reader (&reader_specs
, &cu
);
3087 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3090 if (this_cu
->from_debug_types
)
3092 /* offset,length haven't been set yet for type units. */
3093 this_cu
->offset
= cu
.header
.offset
;
3094 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3096 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3098 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3099 + cu
.header
.initial_length_size
);
3100 do_cleanups (back_to_inner
);
3104 /* Set the language we're debugging. */
3105 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
3107 set_cu_language (DW_UNSND (attr
), &cu
);
3109 set_cu_language (language_minimal
, &cu
);
3111 /* Allocate a new partial symbol table structure. */
3112 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3113 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3114 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3115 /* TEXTLOW and TEXTHIGH are set below. */
3117 objfile
->global_psymbols
.next
,
3118 objfile
->static_psymbols
.next
);
3120 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3122 pst
->dirname
= DW_STRING (attr
);
3124 pst
->read_symtab_private
= this_cu
;
3126 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3128 /* Store the function that reads in the rest of the symbol table */
3129 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3131 this_cu
->v
.psymtab
= pst
;
3133 dwarf2_find_base_address (comp_unit_die
, &cu
);
3135 /* Possibly set the default values of LOWPC and HIGHPC from
3137 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3138 &best_highpc
, &cu
, pst
);
3139 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3140 /* Store the contiguous range if it is not empty; it can be empty for
3141 CUs with no code. */
3142 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3143 best_lowpc
+ baseaddr
,
3144 best_highpc
+ baseaddr
- 1, pst
);
3146 /* Check if comp unit has_children.
3147 If so, read the rest of the partial symbols from this comp unit.
3148 If not, there's no more debug_info for this comp unit. */
3151 struct partial_die_info
*first_die
;
3152 CORE_ADDR lowpc
, highpc
;
3154 lowpc
= ((CORE_ADDR
) -1);
3155 highpc
= ((CORE_ADDR
) 0);
3157 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3159 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3160 ! has_pc_info
, &cu
);
3162 /* If we didn't find a lowpc, set it to highpc to avoid
3163 complaints from `maint check'. */
3164 if (lowpc
== ((CORE_ADDR
) -1))
3167 /* If the compilation unit didn't have an explicit address range,
3168 then use the information extracted from its child dies. */
3172 best_highpc
= highpc
;
3175 pst
->textlow
= best_lowpc
+ baseaddr
;
3176 pst
->texthigh
= best_highpc
+ baseaddr
;
3178 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3179 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3180 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3181 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3182 sort_pst_symbols (pst
);
3184 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3185 + cu
.header
.initial_length_size
);
3187 if (this_cu
->from_debug_types
)
3189 /* It's not clear we want to do anything with stmt lists here.
3190 Waiting to see what gcc ultimately does. */
3194 /* Get the list of files included in the current compilation unit,
3195 and build a psymtab for each of them. */
3196 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3199 do_cleanups (back_to_inner
);
3204 /* Traversal function for htab_traverse_noresize.
3205 Process one .debug_types comp-unit. */
3208 process_type_comp_unit (void **slot
, void *info
)
3210 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3211 struct objfile
*objfile
= (struct objfile
*) info
;
3212 struct dwarf2_per_cu_data
*this_cu
;
3214 this_cu
= &entry
->per_cu
;
3216 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3217 process_psymtab_comp_unit (objfile
, this_cu
,
3218 dwarf2_per_objfile
->types
.buffer
,
3219 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3220 dwarf2_per_objfile
->types
.size
);
3225 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3226 Build partial symbol tables for the .debug_types comp-units. */
3229 build_type_psymtabs (struct objfile
*objfile
)
3231 if (! create_debug_types_hash_table (objfile
))
3234 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3235 process_type_comp_unit
, objfile
);
3238 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3241 psymtabs_addrmap_cleanup (void *o
)
3243 struct objfile
*objfile
= o
;
3245 objfile
->psymtabs_addrmap
= NULL
;
3248 /* Build the partial symbol table by doing a quick pass through the
3249 .debug_info and .debug_abbrev sections. */
3252 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3255 struct cleanup
*back_to
, *addrmap_cleanup
;
3256 struct obstack temp_obstack
;
3258 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3260 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3261 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3263 /* Any cached compilation units will be linked by the per-objfile
3264 read_in_chain. Make sure to free them when we're done. */
3265 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3267 build_type_psymtabs (objfile
);
3269 create_all_comp_units (objfile
);
3271 /* Create a temporary address map on a temporary obstack. We later
3272 copy this to the final obstack. */
3273 obstack_init (&temp_obstack
);
3274 make_cleanup_obstack_free (&temp_obstack
);
3275 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3276 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3278 /* Since the objects we're extracting from .debug_info vary in
3279 length, only the individual functions to extract them (like
3280 read_comp_unit_head and load_partial_die) can really know whether
3281 the buffer is large enough to hold another complete object.
3283 At the moment, they don't actually check that. If .debug_info
3284 holds just one extra byte after the last compilation unit's dies,
3285 then read_comp_unit_head will happily read off the end of the
3286 buffer. read_partial_die is similarly casual. Those functions
3289 For this loop condition, simply checking whether there's any data
3290 left at all should be sufficient. */
3292 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3293 + dwarf2_per_objfile
->info
.size
))
3295 struct dwarf2_per_cu_data
*this_cu
;
3297 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
3300 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3301 dwarf2_per_objfile
->info
.buffer
,
3303 dwarf2_per_objfile
->info
.size
);
3306 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3307 &objfile
->objfile_obstack
);
3308 discard_cleanups (addrmap_cleanup
);
3310 do_cleanups (back_to
);
3313 /* Load the partial DIEs for a secondary CU into memory. */
3316 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3317 struct objfile
*objfile
)
3319 bfd
*abfd
= objfile
->obfd
;
3320 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3321 struct die_info
*comp_unit_die
;
3322 struct dwarf2_cu
*cu
;
3323 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3324 struct attribute
*attr
;
3326 struct die_reader_specs reader_specs
;
3329 gdb_assert (! this_cu
->from_debug_types
);
3331 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3332 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3333 beg_of_comp_unit
= info_ptr
;
3335 if (this_cu
->cu
== NULL
)
3337 cu
= alloc_one_comp_unit (objfile
);
3341 /* If an error occurs while loading, release our storage. */
3342 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3344 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3345 dwarf2_per_objfile
->info
.buffer
,
3346 dwarf2_per_objfile
->info
.size
,
3349 /* Complete the cu_header. */
3350 cu
->header
.offset
= this_cu
->offset
;
3351 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3353 /* Link this compilation unit into the compilation unit tree. */
3355 cu
->per_cu
= this_cu
;
3357 /* Link this CU into read_in_chain. */
3358 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3359 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3364 info_ptr
+= cu
->header
.first_die_offset
;
3367 /* Read the abbrevs for this compilation unit into a table. */
3368 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3369 dwarf2_read_abbrevs (abfd
, cu
);
3370 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3372 /* Read the compilation unit die. */
3373 init_cu_die_reader (&reader_specs
, cu
);
3374 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3377 /* Set the language we're debugging. */
3378 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
3380 set_cu_language (DW_UNSND (attr
), cu
);
3382 set_cu_language (language_minimal
, cu
);
3384 /* Check if comp unit has_children.
3385 If so, read the rest of the partial symbols from this comp unit.
3386 If not, there's no more debug_info for this comp unit. */
3388 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3390 do_cleanups (free_abbrevs_cleanup
);
3394 /* We've successfully allocated this compilation unit. Let our
3395 caller clean it up when finished with it. */
3396 discard_cleanups (free_cu_cleanup
);
3400 /* Create a list of all compilation units in OBJFILE. We do this only
3401 if an inter-comp-unit reference is found; presumably if there is one,
3402 there will be many, and one will occur early in the .debug_info section.
3403 So there's no point in building this list incrementally. */
3406 create_all_comp_units (struct objfile
*objfile
)
3410 struct dwarf2_per_cu_data
**all_comp_units
;
3413 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3414 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3418 all_comp_units
= xmalloc (n_allocated
3419 * sizeof (struct dwarf2_per_cu_data
*));
3421 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
3423 unsigned int length
, initial_length_size
;
3424 struct dwarf2_per_cu_data
*this_cu
;
3425 unsigned int offset
;
3427 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3429 /* Read just enough information to find out where the next
3430 compilation unit is. */
3431 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3432 &initial_length_size
);
3434 /* Save the compilation unit for later lookup. */
3435 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3436 sizeof (struct dwarf2_per_cu_data
));
3437 memset (this_cu
, 0, sizeof (*this_cu
));
3438 this_cu
->offset
= offset
;
3439 this_cu
->length
= length
+ initial_length_size
;
3440 this_cu
->objfile
= objfile
;
3442 if (n_comp_units
== n_allocated
)
3445 all_comp_units
= xrealloc (all_comp_units
,
3447 * sizeof (struct dwarf2_per_cu_data
*));
3449 all_comp_units
[n_comp_units
++] = this_cu
;
3451 info_ptr
= info_ptr
+ this_cu
->length
;
3454 dwarf2_per_objfile
->all_comp_units
3455 = obstack_alloc (&objfile
->objfile_obstack
,
3456 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3457 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3458 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3459 xfree (all_comp_units
);
3460 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3463 /* Process all loaded DIEs for compilation unit CU, starting at
3464 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3465 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3466 DW_AT_ranges). If NEED_PC is set, then this function will set
3467 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3468 and record the covered ranges in the addrmap. */
3471 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3472 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3474 struct partial_die_info
*pdi
;
3476 /* Now, march along the PDI's, descending into ones which have
3477 interesting children but skipping the children of the other ones,
3478 until we reach the end of the compilation unit. */
3484 fixup_partial_die (pdi
, cu
);
3486 /* Anonymous namespaces or modules have no name but have interesting
3487 children, so we need to look at them. Ditto for anonymous
3490 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3491 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3495 case DW_TAG_subprogram
:
3496 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3498 case DW_TAG_variable
:
3499 case DW_TAG_typedef
:
3500 case DW_TAG_union_type
:
3501 if (!pdi
->is_declaration
)
3503 add_partial_symbol (pdi
, cu
);
3506 case DW_TAG_class_type
:
3507 case DW_TAG_interface_type
:
3508 case DW_TAG_structure_type
:
3509 if (!pdi
->is_declaration
)
3511 add_partial_symbol (pdi
, cu
);
3514 case DW_TAG_enumeration_type
:
3515 if (!pdi
->is_declaration
)
3516 add_partial_enumeration (pdi
, cu
);
3518 case DW_TAG_base_type
:
3519 case DW_TAG_subrange_type
:
3520 /* File scope base type definitions are added to the partial
3522 add_partial_symbol (pdi
, cu
);
3524 case DW_TAG_namespace
:
3525 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3528 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3535 /* If the die has a sibling, skip to the sibling. */
3537 pdi
= pdi
->die_sibling
;
3541 /* Functions used to compute the fully scoped name of a partial DIE.
3543 Normally, this is simple. For C++, the parent DIE's fully scoped
3544 name is concatenated with "::" and the partial DIE's name. For
3545 Java, the same thing occurs except that "." is used instead of "::".
3546 Enumerators are an exception; they use the scope of their parent
3547 enumeration type, i.e. the name of the enumeration type is not
3548 prepended to the enumerator.
3550 There are two complexities. One is DW_AT_specification; in this
3551 case "parent" means the parent of the target of the specification,
3552 instead of the direct parent of the DIE. The other is compilers
3553 which do not emit DW_TAG_namespace; in this case we try to guess
3554 the fully qualified name of structure types from their members'
3555 linkage names. This must be done using the DIE's children rather
3556 than the children of any DW_AT_specification target. We only need
3557 to do this for structures at the top level, i.e. if the target of
3558 any DW_AT_specification (if any; otherwise the DIE itself) does not
3561 /* Compute the scope prefix associated with PDI's parent, in
3562 compilation unit CU. The result will be allocated on CU's
3563 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3564 field. NULL is returned if no prefix is necessary. */
3566 partial_die_parent_scope (struct partial_die_info
*pdi
,
3567 struct dwarf2_cu
*cu
)
3569 char *grandparent_scope
;
3570 struct partial_die_info
*parent
, *real_pdi
;
3572 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3573 then this means the parent of the specification DIE. */
3576 while (real_pdi
->has_specification
)
3577 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3579 parent
= real_pdi
->die_parent
;
3583 if (parent
->scope_set
)
3584 return parent
->scope
;
3586 fixup_partial_die (parent
, cu
);
3588 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3590 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3591 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3592 Work around this problem here. */
3593 if (cu
->language
== language_cplus
3594 && parent
->tag
== DW_TAG_namespace
3595 && strcmp (parent
->name
, "::") == 0
3596 && grandparent_scope
== NULL
)
3598 parent
->scope
= NULL
;
3599 parent
->scope_set
= 1;
3603 if (parent
->tag
== DW_TAG_namespace
3604 || parent
->tag
== DW_TAG_module
3605 || parent
->tag
== DW_TAG_structure_type
3606 || parent
->tag
== DW_TAG_class_type
3607 || parent
->tag
== DW_TAG_interface_type
3608 || parent
->tag
== DW_TAG_union_type
3609 || parent
->tag
== DW_TAG_enumeration_type
)
3611 if (grandparent_scope
== NULL
)
3612 parent
->scope
= parent
->name
;
3614 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
3615 parent
->name
, 0, cu
);
3617 else if (parent
->tag
== DW_TAG_enumerator
)
3618 /* Enumerators should not get the name of the enumeration as a prefix. */
3619 parent
->scope
= grandparent_scope
;
3622 /* FIXME drow/2004-04-01: What should we be doing with
3623 function-local names? For partial symbols, we should probably be
3625 complaint (&symfile_complaints
,
3626 _("unhandled containing DIE tag %d for DIE at %d"),
3627 parent
->tag
, pdi
->offset
);
3628 parent
->scope
= grandparent_scope
;
3631 parent
->scope_set
= 1;
3632 return parent
->scope
;
3635 /* Return the fully scoped name associated with PDI, from compilation unit
3636 CU. The result will be allocated with malloc. */
3638 partial_die_full_name (struct partial_die_info
*pdi
,
3639 struct dwarf2_cu
*cu
)
3643 /* If this is a template instantiation, we can not work out the
3644 template arguments from partial DIEs. So, unfortunately, we have
3645 to go through the full DIEs. At least any work we do building
3646 types here will be reused if full symbols are loaded later. */
3647 if (pdi
->has_template_arguments
)
3649 fixup_partial_die (pdi
, cu
);
3651 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3653 struct die_info
*die
;
3654 struct attribute attr
;
3655 struct dwarf2_cu
*ref_cu
= cu
;
3658 attr
.form
= DW_FORM_ref_addr
;
3659 attr
.u
.addr
= pdi
->offset
;
3660 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3662 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3666 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3667 if (parent_scope
== NULL
)
3670 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3674 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3676 struct objfile
*objfile
= cu
->objfile
;
3678 char *actual_name
= NULL
;
3679 const struct partial_symbol
*psym
= NULL
;
3681 int built_actual_name
= 0;
3683 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3685 actual_name
= partial_die_full_name (pdi
, cu
);
3687 built_actual_name
= 1;
3689 if (actual_name
== NULL
)
3690 actual_name
= pdi
->name
;
3694 case DW_TAG_subprogram
:
3695 if (pdi
->is_external
|| cu
->language
== language_ada
)
3697 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3698 of the global scope. But in Ada, we want to be able to access
3699 nested procedures globally. So all Ada subprograms are stored
3700 in the global scope. */
3701 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3702 mst_text, objfile); */
3703 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3705 VAR_DOMAIN
, LOC_BLOCK
,
3706 &objfile
->global_psymbols
,
3707 0, pdi
->lowpc
+ baseaddr
,
3708 cu
->language
, objfile
);
3712 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3713 mst_file_text, objfile); */
3714 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3716 VAR_DOMAIN
, LOC_BLOCK
,
3717 &objfile
->static_psymbols
,
3718 0, pdi
->lowpc
+ baseaddr
,
3719 cu
->language
, objfile
);
3722 case DW_TAG_variable
:
3724 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3728 && !dwarf2_per_objfile
->has_section_at_zero
)
3730 /* A global or static variable may also have been stripped
3731 out by the linker if unused, in which case its address
3732 will be nullified; do not add such variables into partial
3733 symbol table then. */
3735 else if (pdi
->is_external
)
3738 Don't enter into the minimal symbol tables as there is
3739 a minimal symbol table entry from the ELF symbols already.
3740 Enter into partial symbol table if it has a location
3741 descriptor or a type.
3742 If the location descriptor is missing, new_symbol will create
3743 a LOC_UNRESOLVED symbol, the address of the variable will then
3744 be determined from the minimal symbol table whenever the variable
3746 The address for the partial symbol table entry is not
3747 used by GDB, but it comes in handy for debugging partial symbol
3750 if (pdi
->locdesc
|| pdi
->has_type
)
3751 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3753 VAR_DOMAIN
, LOC_STATIC
,
3754 &objfile
->global_psymbols
,
3756 cu
->language
, objfile
);
3760 /* Static Variable. Skip symbols without location descriptors. */
3761 if (pdi
->locdesc
== NULL
)
3763 if (built_actual_name
)
3764 xfree (actual_name
);
3767 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3768 mst_file_data, objfile); */
3769 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3771 VAR_DOMAIN
, LOC_STATIC
,
3772 &objfile
->static_psymbols
,
3774 cu
->language
, objfile
);
3777 case DW_TAG_typedef
:
3778 case DW_TAG_base_type
:
3779 case DW_TAG_subrange_type
:
3780 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3782 VAR_DOMAIN
, LOC_TYPEDEF
,
3783 &objfile
->static_psymbols
,
3784 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3786 case DW_TAG_namespace
:
3787 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3789 VAR_DOMAIN
, LOC_TYPEDEF
,
3790 &objfile
->global_psymbols
,
3791 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3793 case DW_TAG_class_type
:
3794 case DW_TAG_interface_type
:
3795 case DW_TAG_structure_type
:
3796 case DW_TAG_union_type
:
3797 case DW_TAG_enumeration_type
:
3798 /* Skip external references. The DWARF standard says in the section
3799 about "Structure, Union, and Class Type Entries": "An incomplete
3800 structure, union or class type is represented by a structure,
3801 union or class entry that does not have a byte size attribute
3802 and that has a DW_AT_declaration attribute." */
3803 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3805 if (built_actual_name
)
3806 xfree (actual_name
);
3810 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3811 static vs. global. */
3812 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3814 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3815 (cu
->language
== language_cplus
3816 || cu
->language
== language_java
)
3817 ? &objfile
->global_psymbols
3818 : &objfile
->static_psymbols
,
3819 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3822 case DW_TAG_enumerator
:
3823 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3825 VAR_DOMAIN
, LOC_CONST
,
3826 (cu
->language
== language_cplus
3827 || cu
->language
== language_java
)
3828 ? &objfile
->global_psymbols
3829 : &objfile
->static_psymbols
,
3830 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3836 if (built_actual_name
)
3837 xfree (actual_name
);
3840 /* Read a partial die corresponding to a namespace; also, add a symbol
3841 corresponding to that namespace to the symbol table. NAMESPACE is
3842 the name of the enclosing namespace. */
3845 add_partial_namespace (struct partial_die_info
*pdi
,
3846 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3847 int need_pc
, struct dwarf2_cu
*cu
)
3849 /* Add a symbol for the namespace. */
3851 add_partial_symbol (pdi
, cu
);
3853 /* Now scan partial symbols in that namespace. */
3855 if (pdi
->has_children
)
3856 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3859 /* Read a partial die corresponding to a Fortran module. */
3862 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3863 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3865 /* Now scan partial symbols in that module. */
3867 if (pdi
->has_children
)
3868 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3871 /* Read a partial die corresponding to a subprogram and create a partial
3872 symbol for that subprogram. When the CU language allows it, this
3873 routine also defines a partial symbol for each nested subprogram
3874 that this subprogram contains.
3876 DIE my also be a lexical block, in which case we simply search
3877 recursively for suprograms defined inside that lexical block.
3878 Again, this is only performed when the CU language allows this
3879 type of definitions. */
3882 add_partial_subprogram (struct partial_die_info
*pdi
,
3883 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3884 int need_pc
, struct dwarf2_cu
*cu
)
3886 if (pdi
->tag
== DW_TAG_subprogram
)
3888 if (pdi
->has_pc_info
)
3890 if (pdi
->lowpc
< *lowpc
)
3891 *lowpc
= pdi
->lowpc
;
3892 if (pdi
->highpc
> *highpc
)
3893 *highpc
= pdi
->highpc
;
3897 struct objfile
*objfile
= cu
->objfile
;
3899 baseaddr
= ANOFFSET (objfile
->section_offsets
,
3900 SECT_OFF_TEXT (objfile
));
3901 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3902 pdi
->lowpc
+ baseaddr
,
3903 pdi
->highpc
- 1 + baseaddr
,
3904 cu
->per_cu
->v
.psymtab
);
3906 if (!pdi
->is_declaration
)
3907 /* Ignore subprogram DIEs that do not have a name, they are
3908 illegal. Do not emit a complaint at this point, we will
3909 do so when we convert this psymtab into a symtab. */
3911 add_partial_symbol (pdi
, cu
);
3915 if (! pdi
->has_children
)
3918 if (cu
->language
== language_ada
)
3920 pdi
= pdi
->die_child
;
3923 fixup_partial_die (pdi
, cu
);
3924 if (pdi
->tag
== DW_TAG_subprogram
3925 || pdi
->tag
== DW_TAG_lexical_block
)
3926 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3927 pdi
= pdi
->die_sibling
;
3932 /* See if we can figure out if the class lives in a namespace. We do
3933 this by looking for a member function; its demangled name will
3934 contain namespace info, if there is any. */
3937 guess_structure_name (struct partial_die_info
*struct_pdi
,
3938 struct dwarf2_cu
*cu
)
3940 if ((cu
->language
== language_cplus
3941 || cu
->language
== language_java
)
3942 && cu
->has_namespace_info
== 0
3943 && struct_pdi
->has_children
)
3945 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3946 what template types look like, because the demangler
3947 frequently doesn't give the same name as the debug info. We
3948 could fix this by only using the demangled name to get the
3949 prefix (but see comment in read_structure_type). */
3951 struct partial_die_info
*real_pdi
;
3953 /* If this DIE (this DIE's specification, if any) has a parent, then
3954 we should not do this. We'll prepend the parent's fully qualified
3955 name when we create the partial symbol. */
3957 real_pdi
= struct_pdi
;
3958 while (real_pdi
->has_specification
)
3959 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3961 if (real_pdi
->die_parent
!= NULL
)
3966 /* Read a partial die corresponding to an enumeration type. */
3969 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
3970 struct dwarf2_cu
*cu
)
3972 struct partial_die_info
*pdi
;
3974 if (enum_pdi
->name
!= NULL
)
3975 add_partial_symbol (enum_pdi
, cu
);
3977 pdi
= enum_pdi
->die_child
;
3980 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
3981 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
3983 add_partial_symbol (pdi
, cu
);
3984 pdi
= pdi
->die_sibling
;
3988 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3989 Return the corresponding abbrev, or NULL if the number is zero (indicating
3990 an empty DIE). In either case *BYTES_READ will be set to the length of
3991 the initial number. */
3993 static struct abbrev_info
*
3994 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
3995 struct dwarf2_cu
*cu
)
3997 bfd
*abfd
= cu
->objfile
->obfd
;
3998 unsigned int abbrev_number
;
3999 struct abbrev_info
*abbrev
;
4001 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4003 if (abbrev_number
== 0)
4006 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4009 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
4010 bfd_get_filename (abfd
));
4016 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4017 Returns a pointer to the end of a series of DIEs, terminated by an empty
4018 DIE. Any children of the skipped DIEs will also be skipped. */
4021 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4023 struct abbrev_info
*abbrev
;
4024 unsigned int bytes_read
;
4028 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4030 return info_ptr
+ bytes_read
;
4032 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4036 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4037 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4038 abbrev corresponding to that skipped uleb128 should be passed in
4039 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4043 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4044 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4046 unsigned int bytes_read
;
4047 struct attribute attr
;
4048 bfd
*abfd
= cu
->objfile
->obfd
;
4049 unsigned int form
, i
;
4051 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4053 /* The only abbrev we care about is DW_AT_sibling. */
4054 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4056 read_attribute (&attr
, &abbrev
->attrs
[i
],
4057 abfd
, info_ptr
, cu
);
4058 if (attr
.form
== DW_FORM_ref_addr
)
4059 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
4061 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4064 /* If it isn't DW_AT_sibling, skip this attribute. */
4065 form
= abbrev
->attrs
[i
].form
;
4069 case DW_FORM_ref_addr
:
4070 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4071 and later it is offset sized. */
4072 if (cu
->header
.version
== 2)
4073 info_ptr
+= cu
->header
.addr_size
;
4075 info_ptr
+= cu
->header
.offset_size
;
4078 info_ptr
+= cu
->header
.addr_size
;
4085 case DW_FORM_flag_present
:
4100 case DW_FORM_string
:
4101 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4102 info_ptr
+= bytes_read
;
4104 case DW_FORM_sec_offset
:
4106 info_ptr
+= cu
->header
.offset_size
;
4108 case DW_FORM_exprloc
:
4110 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4111 info_ptr
+= bytes_read
;
4113 case DW_FORM_block1
:
4114 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4116 case DW_FORM_block2
:
4117 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4119 case DW_FORM_block4
:
4120 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4124 case DW_FORM_ref_udata
:
4125 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4127 case DW_FORM_indirect
:
4128 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4129 info_ptr
+= bytes_read
;
4130 /* We need to continue parsing from here, so just go back to
4132 goto skip_attribute
;
4135 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4136 dwarf_form_name (form
),
4137 bfd_get_filename (abfd
));
4141 if (abbrev
->has_children
)
4142 return skip_children (buffer
, info_ptr
, cu
);
4147 /* Locate ORIG_PDI's sibling.
4148 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4152 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4153 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4154 bfd
*abfd
, struct dwarf2_cu
*cu
)
4156 /* Do we know the sibling already? */
4158 if (orig_pdi
->sibling
)
4159 return orig_pdi
->sibling
;
4161 /* Are there any children to deal with? */
4163 if (!orig_pdi
->has_children
)
4166 /* Skip the children the long way. */
4168 return skip_children (buffer
, info_ptr
, cu
);
4171 /* Expand this partial symbol table into a full symbol table. */
4174 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4180 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
4186 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
4187 gdb_flush (gdb_stdout
);
4190 /* Restore our global data. */
4191 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4192 dwarf2_objfile_data_key
);
4194 /* If this psymtab is constructed from a debug-only objfile, the
4195 has_section_at_zero flag will not necessarily be correct. We
4196 can get the correct value for this flag by looking at the data
4197 associated with the (presumably stripped) associated objfile. */
4198 if (pst
->objfile
->separate_debug_objfile_backlink
)
4200 struct dwarf2_per_objfile
*dpo_backlink
4201 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4202 dwarf2_objfile_data_key
);
4204 dwarf2_per_objfile
->has_section_at_zero
4205 = dpo_backlink
->has_section_at_zero
;
4208 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4210 psymtab_to_symtab_1 (pst
);
4212 /* Finish up the debug error message. */
4214 printf_filtered (_("done.\n"));
4219 /* Add PER_CU to the queue. */
4222 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4224 struct dwarf2_queue_item
*item
;
4227 item
= xmalloc (sizeof (*item
));
4228 item
->per_cu
= per_cu
;
4231 if (dwarf2_queue
== NULL
)
4232 dwarf2_queue
= item
;
4234 dwarf2_queue_tail
->next
= item
;
4236 dwarf2_queue_tail
= item
;
4239 /* Process the queue. */
4242 process_queue (struct objfile
*objfile
)
4244 struct dwarf2_queue_item
*item
, *next_item
;
4246 /* The queue starts out with one item, but following a DIE reference
4247 may load a new CU, adding it to the end of the queue. */
4248 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4250 if (dwarf2_per_objfile
->using_index
4251 ? !item
->per_cu
->v
.quick
->symtab
4252 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4253 process_full_comp_unit (item
->per_cu
);
4255 item
->per_cu
->queued
= 0;
4256 next_item
= item
->next
;
4260 dwarf2_queue_tail
= NULL
;
4263 /* Free all allocated queue entries. This function only releases anything if
4264 an error was thrown; if the queue was processed then it would have been
4265 freed as we went along. */
4268 dwarf2_release_queue (void *dummy
)
4270 struct dwarf2_queue_item
*item
, *last
;
4272 item
= dwarf2_queue
;
4275 /* Anything still marked queued is likely to be in an
4276 inconsistent state, so discard it. */
4277 if (item
->per_cu
->queued
)
4279 if (item
->per_cu
->cu
!= NULL
)
4280 free_one_cached_comp_unit (item
->per_cu
->cu
);
4281 item
->per_cu
->queued
= 0;
4289 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4292 /* Read in full symbols for PST, and anything it depends on. */
4295 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4297 struct dwarf2_per_cu_data
*per_cu
;
4298 struct cleanup
*back_to
;
4301 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4302 if (!pst
->dependencies
[i
]->readin
)
4304 /* Inform about additional files that need to be read in. */
4307 /* FIXME: i18n: Need to make this a single string. */
4308 fputs_filtered (" ", gdb_stdout
);
4310 fputs_filtered ("and ", gdb_stdout
);
4312 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4313 wrap_here (""); /* Flush output */
4314 gdb_flush (gdb_stdout
);
4316 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4319 per_cu
= pst
->read_symtab_private
;
4323 /* It's an include file, no symbols to read for it.
4324 Everything is in the parent symtab. */
4329 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4332 /* Load the DIEs associated with PER_CU into memory. */
4335 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4337 bfd
*abfd
= objfile
->obfd
;
4338 struct dwarf2_cu
*cu
;
4339 unsigned int offset
;
4340 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4341 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4342 struct attribute
*attr
;
4345 gdb_assert (! per_cu
->from_debug_types
);
4347 /* Set local variables from the partial symbol table info. */
4348 offset
= per_cu
->offset
;
4350 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4351 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4352 beg_of_comp_unit
= info_ptr
;
4354 if (per_cu
->cu
== NULL
)
4356 cu
= alloc_one_comp_unit (objfile
);
4360 /* If an error occurs while loading, release our storage. */
4361 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4363 /* Read in the comp_unit header. */
4364 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4366 /* Complete the cu_header. */
4367 cu
->header
.offset
= offset
;
4368 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4370 /* Read the abbrevs for this compilation unit. */
4371 dwarf2_read_abbrevs (abfd
, cu
);
4372 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4374 /* Link this compilation unit into the compilation unit tree. */
4376 cu
->per_cu
= per_cu
;
4378 /* Link this CU into read_in_chain. */
4379 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4380 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4385 info_ptr
+= cu
->header
.first_die_offset
;
4388 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4390 /* We try not to read any attributes in this function, because not
4391 all objfiles needed for references have been loaded yet, and symbol
4392 table processing isn't initialized. But we have to set the CU language,
4393 or we won't be able to build types correctly. */
4394 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
4396 set_cu_language (DW_UNSND (attr
), cu
);
4398 set_cu_language (language_minimal
, cu
);
4400 /* Similarly, if we do not read the producer, we can not apply
4401 producer-specific interpretation. */
4402 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4404 cu
->producer
= DW_STRING (attr
);
4408 do_cleanups (free_abbrevs_cleanup
);
4410 /* We've successfully allocated this compilation unit. Let our
4411 caller clean it up when finished with it. */
4412 discard_cleanups (free_cu_cleanup
);
4416 /* Add a DIE to the delayed physname list. */
4419 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4420 const char *name
, struct die_info
*die
,
4421 struct dwarf2_cu
*cu
)
4423 struct delayed_method_info mi
;
4425 mi
.fnfield_index
= fnfield_index
;
4429 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4432 /* A cleanup for freeing the delayed method list. */
4435 free_delayed_list (void *ptr
)
4437 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4438 if (cu
->method_list
!= NULL
)
4440 VEC_free (delayed_method_info
, cu
->method_list
);
4441 cu
->method_list
= NULL
;
4445 /* Compute the physnames of any methods on the CU's method list.
4447 The computation of method physnames is delayed in order to avoid the
4448 (bad) condition that one of the method's formal parameters is of an as yet
4452 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4455 struct delayed_method_info
*mi
;
4456 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4459 struct fn_fieldlist
*fn_flp
4460 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4461 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4462 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4466 /* Generate full symbol information for PST and CU, whose DIEs have
4467 already been loaded into memory. */
4470 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4472 struct dwarf2_cu
*cu
= per_cu
->cu
;
4473 struct objfile
*objfile
= per_cu
->objfile
;
4474 CORE_ADDR lowpc
, highpc
;
4475 struct symtab
*symtab
;
4476 struct cleanup
*back_to
, *delayed_list_cleanup
;
4479 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4482 back_to
= make_cleanup (really_free_pendings
, NULL
);
4483 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4485 cu
->list_in_scope
= &file_symbols
;
4487 dwarf2_find_base_address (cu
->dies
, cu
);
4489 /* Do line number decoding in read_file_scope () */
4490 process_die (cu
->dies
, cu
);
4492 /* Now that we have processed all the DIEs in the CU, all the types
4493 should be complete, and it should now be safe to compute all of the
4495 compute_delayed_physnames (cu
);
4496 do_cleanups (delayed_list_cleanup
);
4498 /* Some compilers don't define a DW_AT_high_pc attribute for the
4499 compilation unit. If the DW_AT_high_pc is missing, synthesize
4500 it, by scanning the DIE's below the compilation unit. */
4501 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4503 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4505 /* Set symtab language to language from DW_AT_language.
4506 If the compilation is from a C file generated by language preprocessors,
4507 do not set the language if it was already deduced by start_subfile. */
4509 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4511 symtab
->language
= cu
->language
;
4514 if (dwarf2_per_objfile
->using_index
)
4515 per_cu
->v
.quick
->symtab
= symtab
;
4518 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4519 pst
->symtab
= symtab
;
4523 do_cleanups (back_to
);
4526 /* Process a die and its children. */
4529 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4533 case DW_TAG_padding
:
4535 case DW_TAG_compile_unit
:
4536 read_file_scope (die
, cu
);
4538 case DW_TAG_type_unit
:
4539 read_type_unit_scope (die
, cu
);
4541 case DW_TAG_subprogram
:
4542 case DW_TAG_inlined_subroutine
:
4543 read_func_scope (die
, cu
);
4545 case DW_TAG_lexical_block
:
4546 case DW_TAG_try_block
:
4547 case DW_TAG_catch_block
:
4548 read_lexical_block_scope (die
, cu
);
4550 case DW_TAG_class_type
:
4551 case DW_TAG_interface_type
:
4552 case DW_TAG_structure_type
:
4553 case DW_TAG_union_type
:
4554 process_structure_scope (die
, cu
);
4556 case DW_TAG_enumeration_type
:
4557 process_enumeration_scope (die
, cu
);
4560 /* These dies have a type, but processing them does not create
4561 a symbol or recurse to process the children. Therefore we can
4562 read them on-demand through read_type_die. */
4563 case DW_TAG_subroutine_type
:
4564 case DW_TAG_set_type
:
4565 case DW_TAG_array_type
:
4566 case DW_TAG_pointer_type
:
4567 case DW_TAG_ptr_to_member_type
:
4568 case DW_TAG_reference_type
:
4569 case DW_TAG_string_type
:
4572 case DW_TAG_base_type
:
4573 case DW_TAG_subrange_type
:
4574 case DW_TAG_typedef
:
4575 /* Add a typedef symbol for the type definition, if it has a
4577 new_symbol (die
, read_type_die (die
, cu
), cu
);
4579 case DW_TAG_common_block
:
4580 read_common_block (die
, cu
);
4582 case DW_TAG_common_inclusion
:
4584 case DW_TAG_namespace
:
4585 processing_has_namespace_info
= 1;
4586 read_namespace (die
, cu
);
4589 processing_has_namespace_info
= 1;
4590 read_module (die
, cu
);
4592 case DW_TAG_imported_declaration
:
4593 case DW_TAG_imported_module
:
4594 processing_has_namespace_info
= 1;
4595 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4596 || cu
->language
!= language_fortran
))
4597 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4598 dwarf_tag_name (die
->tag
));
4599 read_import_statement (die
, cu
);
4602 new_symbol (die
, NULL
, cu
);
4607 /* A helper function for dwarf2_compute_name which determines whether DIE
4608 needs to have the name of the scope prepended to the name listed in the
4612 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4614 struct attribute
*attr
;
4618 case DW_TAG_namespace
:
4619 case DW_TAG_typedef
:
4620 case DW_TAG_class_type
:
4621 case DW_TAG_interface_type
:
4622 case DW_TAG_structure_type
:
4623 case DW_TAG_union_type
:
4624 case DW_TAG_enumeration_type
:
4625 case DW_TAG_enumerator
:
4626 case DW_TAG_subprogram
:
4630 case DW_TAG_variable
:
4631 /* We only need to prefix "globally" visible variables. These include
4632 any variable marked with DW_AT_external or any variable that
4633 lives in a namespace. [Variables in anonymous namespaces
4634 require prefixing, but they are not DW_AT_external.] */
4636 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4638 struct dwarf2_cu
*spec_cu
= cu
;
4640 return die_needs_namespace (die_specification (die
, &spec_cu
),
4644 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4645 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4646 && die
->parent
->tag
!= DW_TAG_module
)
4648 /* A variable in a lexical block of some kind does not need a
4649 namespace, even though in C++ such variables may be external
4650 and have a mangled name. */
4651 if (die
->parent
->tag
== DW_TAG_lexical_block
4652 || die
->parent
->tag
== DW_TAG_try_block
4653 || die
->parent
->tag
== DW_TAG_catch_block
4654 || die
->parent
->tag
== DW_TAG_subprogram
)
4663 /* Retrieve the last character from a mem_file. */
4666 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4668 char *last_char_p
= (char *) object
;
4671 *last_char_p
= buffer
[length
- 1];
4674 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4675 compute the physname for the object, which include a method's
4676 formal parameters (C++/Java) and return type (Java).
4678 For Ada, return the DIE's linkage name rather than the fully qualified
4679 name. PHYSNAME is ignored..
4681 The result is allocated on the objfile_obstack and canonicalized. */
4684 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4688 name
= dwarf2_name (die
, cu
);
4690 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4691 compute it by typename_concat inside GDB. */
4692 if (cu
->language
== language_ada
4693 || (cu
->language
== language_fortran
&& physname
))
4695 /* For Ada unit, we prefer the linkage name over the name, as
4696 the former contains the exported name, which the user expects
4697 to be able to reference. Ideally, we want the user to be able
4698 to reference this entity using either natural or linkage name,
4699 but we haven't started looking at this enhancement yet. */
4700 struct attribute
*attr
;
4702 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4704 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4705 if (attr
&& DW_STRING (attr
))
4706 return DW_STRING (attr
);
4709 /* These are the only languages we know how to qualify names in. */
4711 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4712 || cu
->language
== language_fortran
))
4714 if (die_needs_namespace (die
, cu
))
4718 struct ui_file
*buf
;
4720 prefix
= determine_prefix (die
, cu
);
4721 buf
= mem_fileopen ();
4722 if (*prefix
!= '\0')
4724 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4727 fputs_unfiltered (prefixed_name
, buf
);
4728 xfree (prefixed_name
);
4731 fputs_unfiltered (name
? name
: "", buf
);
4733 /* Template parameters may be specified in the DIE's DW_AT_name, or
4734 as children with DW_TAG_template_type_param or
4735 DW_TAG_value_type_param. If the latter, add them to the name
4736 here. If the name already has template parameters, then
4737 skip this step; some versions of GCC emit both, and
4738 it is more efficient to use the pre-computed name.
4740 Something to keep in mind about this process: it is very
4741 unlikely, or in some cases downright impossible, to produce
4742 something that will match the mangled name of a function.
4743 If the definition of the function has the same debug info,
4744 we should be able to match up with it anyway. But fallbacks
4745 using the minimal symbol, for instance to find a method
4746 implemented in a stripped copy of libstdc++, will not work.
4747 If we do not have debug info for the definition, we will have to
4748 match them up some other way.
4750 When we do name matching there is a related problem with function
4751 templates; two instantiated function templates are allowed to
4752 differ only by their return types, which we do not add here. */
4754 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4756 struct attribute
*attr
;
4757 struct die_info
*child
;
4760 die
->building_fullname
= 1;
4762 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4767 struct dwarf2_locexpr_baton
*baton
;
4770 if (child
->tag
!= DW_TAG_template_type_param
4771 && child
->tag
!= DW_TAG_template_value_param
)
4776 fputs_unfiltered ("<", buf
);
4780 fputs_unfiltered (", ", buf
);
4782 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4785 complaint (&symfile_complaints
,
4786 _("template parameter missing DW_AT_type"));
4787 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4790 type
= die_type (child
, cu
);
4792 if (child
->tag
== DW_TAG_template_type_param
)
4794 c_print_type (type
, "", buf
, -1, 0);
4798 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4801 complaint (&symfile_complaints
,
4802 _("template parameter missing DW_AT_const_value"));
4803 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4807 dwarf2_const_value_attr (attr
, type
, name
,
4808 &cu
->comp_unit_obstack
, cu
,
4809 &value
, &bytes
, &baton
);
4811 if (TYPE_NOSIGN (type
))
4812 /* GDB prints characters as NUMBER 'CHAR'. If that's
4813 changed, this can use value_print instead. */
4814 c_printchar (value
, type
, buf
);
4817 struct value_print_options opts
;
4820 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4824 else if (bytes
!= NULL
)
4826 v
= allocate_value (type
);
4827 memcpy (value_contents_writeable (v
), bytes
,
4828 TYPE_LENGTH (type
));
4831 v
= value_from_longest (type
, value
);
4833 /* Specify decimal so that we do not depend on the radix. */
4834 get_formatted_print_options (&opts
, 'd');
4836 value_print (v
, buf
, &opts
);
4842 die
->building_fullname
= 0;
4846 /* Close the argument list, with a space if necessary
4847 (nested templates). */
4848 char last_char
= '\0';
4849 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4850 if (last_char
== '>')
4851 fputs_unfiltered (" >", buf
);
4853 fputs_unfiltered (">", buf
);
4857 /* For Java and C++ methods, append formal parameter type
4858 information, if PHYSNAME. */
4860 if (physname
&& die
->tag
== DW_TAG_subprogram
4861 && (cu
->language
== language_cplus
4862 || cu
->language
== language_java
))
4864 struct type
*type
= read_type_die (die
, cu
);
4866 c_type_print_args (type
, buf
, 0, cu
->language
);
4868 if (cu
->language
== language_java
)
4870 /* For java, we must append the return type to method
4872 if (die
->tag
== DW_TAG_subprogram
)
4873 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4876 else if (cu
->language
== language_cplus
)
4878 if (TYPE_NFIELDS (type
) > 0
4879 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4880 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
4881 fputs_unfiltered (" const", buf
);
4885 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4887 ui_file_delete (buf
);
4889 if (cu
->language
== language_cplus
)
4892 = dwarf2_canonicalize_name (name
, cu
,
4893 &cu
->objfile
->objfile_obstack
);
4904 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4905 If scope qualifiers are appropriate they will be added. The result
4906 will be allocated on the objfile_obstack, or NULL if the DIE does
4907 not have a name. NAME may either be from a previous call to
4908 dwarf2_name or NULL.
4910 The output string will be canonicalized (if C++/Java). */
4913 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4915 return dwarf2_compute_name (name
, die
, cu
, 0);
4918 /* Construct a physname for the given DIE in CU. NAME may either be
4919 from a previous call to dwarf2_name or NULL. The result will be
4920 allocated on the objfile_objstack or NULL if the DIE does not have a
4923 The output string will be canonicalized (if C++/Java). */
4926 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4928 return dwarf2_compute_name (name
, die
, cu
, 1);
4931 /* Read the import statement specified by the given die and record it. */
4934 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
4936 struct attribute
*import_attr
;
4937 struct die_info
*imported_die
;
4938 struct dwarf2_cu
*imported_cu
;
4939 const char *imported_name
;
4940 const char *imported_name_prefix
;
4941 const char *canonical_name
;
4942 const char *import_alias
;
4943 const char *imported_declaration
= NULL
;
4944 const char *import_prefix
;
4948 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
4949 if (import_attr
== NULL
)
4951 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
4952 dwarf_tag_name (die
->tag
));
4957 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
4958 imported_name
= dwarf2_name (imported_die
, imported_cu
);
4959 if (imported_name
== NULL
)
4961 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4963 The import in the following code:
4977 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4978 <52> DW_AT_decl_file : 1
4979 <53> DW_AT_decl_line : 6
4980 <54> DW_AT_import : <0x75>
4981 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4983 <5b> DW_AT_decl_file : 1
4984 <5c> DW_AT_decl_line : 2
4985 <5d> DW_AT_type : <0x6e>
4987 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4988 <76> DW_AT_byte_size : 4
4989 <77> DW_AT_encoding : 5 (signed)
4991 imports the wrong die ( 0x75 instead of 0x58 ).
4992 This case will be ignored until the gcc bug is fixed. */
4996 /* Figure out the local name after import. */
4997 import_alias
= dwarf2_name (die
, cu
);
4999 /* Figure out where the statement is being imported to. */
5000 import_prefix
= determine_prefix (die
, cu
);
5002 /* Figure out what the scope of the imported die is and prepend it
5003 to the name of the imported die. */
5004 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5006 if (imported_die
->tag
!= DW_TAG_namespace
5007 && imported_die
->tag
!= DW_TAG_module
)
5009 imported_declaration
= imported_name
;
5010 canonical_name
= imported_name_prefix
;
5012 else if (strlen (imported_name_prefix
) > 0)
5014 temp
= alloca (strlen (imported_name_prefix
)
5015 + 2 + strlen (imported_name
) + 1);
5016 strcpy (temp
, imported_name_prefix
);
5017 strcat (temp
, "::");
5018 strcat (temp
, imported_name
);
5019 canonical_name
= temp
;
5022 canonical_name
= imported_name
;
5024 cp_add_using_directive (import_prefix
,
5027 imported_declaration
,
5028 &cu
->objfile
->objfile_obstack
);
5032 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5034 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5038 free_cu_line_header (void *arg
)
5040 struct dwarf2_cu
*cu
= arg
;
5042 free_line_header (cu
->line_header
);
5043 cu
->line_header
= NULL
;
5047 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5048 char **name
, char **comp_dir
)
5050 struct attribute
*attr
;
5055 /* Find the filename. Do not use dwarf2_name here, since the filename
5056 is not a source language identifier. */
5057 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5060 *name
= DW_STRING (attr
);
5063 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5065 *comp_dir
= DW_STRING (attr
);
5066 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5068 *comp_dir
= ldirname (*name
);
5069 if (*comp_dir
!= NULL
)
5070 make_cleanup (xfree
, *comp_dir
);
5072 if (*comp_dir
!= NULL
)
5074 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5075 directory, get rid of it. */
5076 char *cp
= strchr (*comp_dir
, ':');
5078 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5083 *name
= "<unknown>";
5087 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5089 struct objfile
*objfile
= cu
->objfile
;
5090 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5091 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5092 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5093 struct attribute
*attr
;
5095 char *comp_dir
= NULL
;
5096 struct die_info
*child_die
;
5097 bfd
*abfd
= objfile
->obfd
;
5098 struct line_header
*line_header
= 0;
5101 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5103 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5105 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5106 from finish_block. */
5107 if (lowpc
== ((CORE_ADDR
) -1))
5112 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5114 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5117 set_cu_language (DW_UNSND (attr
), cu
);
5120 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5122 cu
->producer
= DW_STRING (attr
);
5124 /* We assume that we're processing GCC output. */
5125 processing_gcc_compilation
= 2;
5127 processing_has_namespace_info
= 0;
5129 start_symtab (name
, comp_dir
, lowpc
);
5130 record_debugformat ("DWARF 2");
5131 record_producer (cu
->producer
);
5133 initialize_cu_func_list (cu
);
5135 /* Decode line number information if present. We do this before
5136 processing child DIEs, so that the line header table is available
5137 for DW_AT_decl_file. */
5138 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5141 unsigned int line_offset
= DW_UNSND (attr
);
5142 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5145 cu
->line_header
= line_header
;
5146 make_cleanup (free_cu_line_header
, cu
);
5147 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5151 /* Process all dies in compilation unit. */
5152 if (die
->child
!= NULL
)
5154 child_die
= die
->child
;
5155 while (child_die
&& child_die
->tag
)
5157 process_die (child_die
, cu
);
5158 child_die
= sibling_die (child_die
);
5162 /* Decode macro information, if present. Dwarf 2 macro information
5163 refers to information in the line number info statement program
5164 header, so we can only read it if we've read the header
5166 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5167 if (attr
&& line_header
)
5169 unsigned int macro_offset
= DW_UNSND (attr
);
5171 dwarf_decode_macros (line_header
, macro_offset
,
5172 comp_dir
, abfd
, cu
);
5174 do_cleanups (back_to
);
5177 /* For TUs we want to skip the first top level sibling if it's not the
5178 actual type being defined by this TU. In this case the first top
5179 level sibling is there to provide context only. */
5182 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5184 struct objfile
*objfile
= cu
->objfile
;
5185 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5187 struct attribute
*attr
;
5189 char *comp_dir
= NULL
;
5190 struct die_info
*child_die
;
5191 bfd
*abfd
= objfile
->obfd
;
5193 /* start_symtab needs a low pc, but we don't really have one.
5194 Do what read_file_scope would do in the absence of such info. */
5195 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5197 /* Find the filename. Do not use dwarf2_name here, since the filename
5198 is not a source language identifier. */
5199 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5201 name
= DW_STRING (attr
);
5203 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5205 comp_dir
= DW_STRING (attr
);
5206 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5208 comp_dir
= ldirname (name
);
5209 if (comp_dir
!= NULL
)
5210 make_cleanup (xfree
, comp_dir
);
5216 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5218 set_cu_language (DW_UNSND (attr
), cu
);
5220 /* This isn't technically needed today. It is done for symmetry
5221 with read_file_scope. */
5222 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5224 cu
->producer
= DW_STRING (attr
);
5226 /* We assume that we're processing GCC output. */
5227 processing_gcc_compilation
= 2;
5229 processing_has_namespace_info
= 0;
5231 start_symtab (name
, comp_dir
, lowpc
);
5232 record_debugformat ("DWARF 2");
5233 record_producer (cu
->producer
);
5235 /* Process the dies in the type unit. */
5236 if (die
->child
== NULL
)
5238 dump_die_for_error (die
);
5239 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5240 bfd_get_filename (abfd
));
5243 child_die
= die
->child
;
5245 while (child_die
&& child_die
->tag
)
5247 process_die (child_die
, cu
);
5249 child_die
= sibling_die (child_die
);
5252 do_cleanups (back_to
);
5256 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5257 struct dwarf2_cu
*cu
)
5259 struct function_range
*thisfn
;
5261 thisfn
= (struct function_range
*)
5262 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5263 thisfn
->name
= name
;
5264 thisfn
->lowpc
= lowpc
;
5265 thisfn
->highpc
= highpc
;
5266 thisfn
->seen_line
= 0;
5267 thisfn
->next
= NULL
;
5269 if (cu
->last_fn
== NULL
)
5270 cu
->first_fn
= thisfn
;
5272 cu
->last_fn
->next
= thisfn
;
5274 cu
->last_fn
= thisfn
;
5277 /* qsort helper for inherit_abstract_dies. */
5280 unsigned_int_compar (const void *ap
, const void *bp
)
5282 unsigned int a
= *(unsigned int *) ap
;
5283 unsigned int b
= *(unsigned int *) bp
;
5285 return (a
> b
) - (b
> a
);
5288 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5289 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5290 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5293 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5295 struct die_info
*child_die
;
5296 unsigned die_children_count
;
5297 /* CU offsets which were referenced by children of the current DIE. */
5299 unsigned *offsets_end
, *offsetp
;
5300 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5301 struct die_info
*origin_die
;
5302 /* Iterator of the ORIGIN_DIE children. */
5303 struct die_info
*origin_child_die
;
5304 struct cleanup
*cleanups
;
5305 struct attribute
*attr
;
5306 struct dwarf2_cu
*origin_cu
;
5307 struct pending
**origin_previous_list_in_scope
;
5309 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5313 /* Note that following die references may follow to a die in a
5317 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5319 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5321 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5322 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5324 if (die
->tag
!= origin_die
->tag
5325 && !(die
->tag
== DW_TAG_inlined_subroutine
5326 && origin_die
->tag
== DW_TAG_subprogram
))
5327 complaint (&symfile_complaints
,
5328 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5329 die
->offset
, origin_die
->offset
);
5331 child_die
= die
->child
;
5332 die_children_count
= 0;
5333 while (child_die
&& child_die
->tag
)
5335 child_die
= sibling_die (child_die
);
5336 die_children_count
++;
5338 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5339 cleanups
= make_cleanup (xfree
, offsets
);
5341 offsets_end
= offsets
;
5342 child_die
= die
->child
;
5343 while (child_die
&& child_die
->tag
)
5345 /* For each CHILD_DIE, find the corresponding child of
5346 ORIGIN_DIE. If there is more than one layer of
5347 DW_AT_abstract_origin, follow them all; there shouldn't be,
5348 but GCC versions at least through 4.4 generate this (GCC PR
5350 struct die_info
*child_origin_die
= child_die
;
5351 struct dwarf2_cu
*child_origin_cu
= cu
;
5355 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5359 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5363 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5364 counterpart may exist. */
5365 if (child_origin_die
!= child_die
)
5367 if (child_die
->tag
!= child_origin_die
->tag
5368 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5369 && child_origin_die
->tag
== DW_TAG_subprogram
))
5370 complaint (&symfile_complaints
,
5371 _("Child DIE 0x%x and its abstract origin 0x%x have "
5372 "different tags"), child_die
->offset
,
5373 child_origin_die
->offset
);
5374 if (child_origin_die
->parent
!= origin_die
)
5375 complaint (&symfile_complaints
,
5376 _("Child DIE 0x%x and its abstract origin 0x%x have "
5377 "different parents"), child_die
->offset
,
5378 child_origin_die
->offset
);
5380 *offsets_end
++ = child_origin_die
->offset
;
5382 child_die
= sibling_die (child_die
);
5384 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5385 unsigned_int_compar
);
5386 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5387 if (offsetp
[-1] == *offsetp
)
5388 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
5389 "to DIE 0x%x as their abstract origin"),
5390 die
->offset
, *offsetp
);
5393 origin_child_die
= origin_die
->child
;
5394 while (origin_child_die
&& origin_child_die
->tag
)
5396 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5397 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5399 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5401 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5402 process_die (origin_child_die
, origin_cu
);
5404 origin_child_die
= sibling_die (origin_child_die
);
5406 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5408 do_cleanups (cleanups
);
5412 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5414 struct objfile
*objfile
= cu
->objfile
;
5415 struct context_stack
*new;
5418 struct die_info
*child_die
;
5419 struct attribute
*attr
, *call_line
, *call_file
;
5422 struct block
*block
;
5423 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5424 VEC (symbolp
) *template_args
= NULL
;
5425 struct template_symbol
*templ_func
= NULL
;
5429 /* If we do not have call site information, we can't show the
5430 caller of this inlined function. That's too confusing, so
5431 only use the scope for local variables. */
5432 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5433 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5434 if (call_line
== NULL
|| call_file
== NULL
)
5436 read_lexical_block_scope (die
, cu
);
5441 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5443 name
= dwarf2_name (die
, cu
);
5445 /* Ignore functions with missing or empty names. These are actually
5446 illegal according to the DWARF standard. */
5449 complaint (&symfile_complaints
,
5450 _("missing name for subprogram DIE at %d"), die
->offset
);
5454 /* Ignore functions with missing or invalid low and high pc attributes. */
5455 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5457 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5458 if (!attr
|| !DW_UNSND (attr
))
5459 complaint (&symfile_complaints
,
5460 _("cannot get low and high bounds for subprogram DIE at %d"),
5468 /* Record the function range for dwarf_decode_lines. */
5469 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5471 /* If we have any template arguments, then we must allocate a
5472 different sort of symbol. */
5473 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5475 if (child_die
->tag
== DW_TAG_template_type_param
5476 || child_die
->tag
== DW_TAG_template_value_param
)
5478 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5479 struct template_symbol
);
5480 templ_func
->base
.is_cplus_template_function
= 1;
5485 new = push_context (0, lowpc
);
5486 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5487 (struct symbol
*) templ_func
);
5489 /* If there is a location expression for DW_AT_frame_base, record
5491 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5493 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5494 expression is being recorded directly in the function's symbol
5495 and not in a separate frame-base object. I guess this hack is
5496 to avoid adding some sort of frame-base adjunct/annex to the
5497 function's symbol :-(. The problem with doing this is that it
5498 results in a function symbol with a location expression that
5499 has nothing to do with the location of the function, ouch! The
5500 relationship should be: a function's symbol has-a frame base; a
5501 frame-base has-a location expression. */
5502 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5504 cu
->list_in_scope
= &local_symbols
;
5506 if (die
->child
!= NULL
)
5508 child_die
= die
->child
;
5509 while (child_die
&& child_die
->tag
)
5511 if (child_die
->tag
== DW_TAG_template_type_param
5512 || child_die
->tag
== DW_TAG_template_value_param
)
5514 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5516 VEC_safe_push (symbolp
, template_args
, arg
);
5519 process_die (child_die
, cu
);
5520 child_die
= sibling_die (child_die
);
5524 inherit_abstract_dies (die
, cu
);
5526 /* If we have a DW_AT_specification, we might need to import using
5527 directives from the context of the specification DIE. See the
5528 comment in determine_prefix. */
5529 if (cu
->language
== language_cplus
5530 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5532 struct dwarf2_cu
*spec_cu
= cu
;
5533 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5537 child_die
= spec_die
->child
;
5538 while (child_die
&& child_die
->tag
)
5540 if (child_die
->tag
== DW_TAG_imported_module
)
5541 process_die (child_die
, spec_cu
);
5542 child_die
= sibling_die (child_die
);
5545 /* In some cases, GCC generates specification DIEs that
5546 themselves contain DW_AT_specification attributes. */
5547 spec_die
= die_specification (spec_die
, &spec_cu
);
5551 new = pop_context ();
5552 /* Make a block for the local symbols within. */
5553 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5554 lowpc
, highpc
, objfile
);
5556 /* For C++, set the block's scope. */
5557 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5558 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5559 determine_prefix (die
, cu
),
5560 processing_has_namespace_info
);
5562 /* If we have address ranges, record them. */
5563 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5565 /* Attach template arguments to function. */
5566 if (! VEC_empty (symbolp
, template_args
))
5568 gdb_assert (templ_func
!= NULL
);
5570 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5571 templ_func
->template_arguments
5572 = obstack_alloc (&objfile
->objfile_obstack
,
5573 (templ_func
->n_template_arguments
5574 * sizeof (struct symbol
*)));
5575 memcpy (templ_func
->template_arguments
,
5576 VEC_address (symbolp
, template_args
),
5577 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5578 VEC_free (symbolp
, template_args
);
5581 /* In C++, we can have functions nested inside functions (e.g., when
5582 a function declares a class that has methods). This means that
5583 when we finish processing a function scope, we may need to go
5584 back to building a containing block's symbol lists. */
5585 local_symbols
= new->locals
;
5586 param_symbols
= new->params
;
5587 using_directives
= new->using_directives
;
5589 /* If we've finished processing a top-level function, subsequent
5590 symbols go in the file symbol list. */
5591 if (outermost_context_p ())
5592 cu
->list_in_scope
= &file_symbols
;
5595 /* Process all the DIES contained within a lexical block scope. Start
5596 a new scope, process the dies, and then close the scope. */
5599 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5601 struct objfile
*objfile
= cu
->objfile
;
5602 struct context_stack
*new;
5603 CORE_ADDR lowpc
, highpc
;
5604 struct die_info
*child_die
;
5607 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5609 /* Ignore blocks with missing or invalid low and high pc attributes. */
5610 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5611 as multiple lexical blocks? Handling children in a sane way would
5612 be nasty. Might be easier to properly extend generic blocks to
5614 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5619 push_context (0, lowpc
);
5620 if (die
->child
!= NULL
)
5622 child_die
= die
->child
;
5623 while (child_die
&& child_die
->tag
)
5625 process_die (child_die
, cu
);
5626 child_die
= sibling_die (child_die
);
5629 new = pop_context ();
5631 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5634 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5637 /* Note that recording ranges after traversing children, as we
5638 do here, means that recording a parent's ranges entails
5639 walking across all its children's ranges as they appear in
5640 the address map, which is quadratic behavior.
5642 It would be nicer to record the parent's ranges before
5643 traversing its children, simply overriding whatever you find
5644 there. But since we don't even decide whether to create a
5645 block until after we've traversed its children, that's hard
5647 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5649 local_symbols
= new->locals
;
5650 using_directives
= new->using_directives
;
5653 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5654 Return 1 if the attributes are present and valid, otherwise, return 0.
5655 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5658 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5659 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5660 struct partial_symtab
*ranges_pst
)
5662 struct objfile
*objfile
= cu
->objfile
;
5663 struct comp_unit_head
*cu_header
= &cu
->header
;
5664 bfd
*obfd
= objfile
->obfd
;
5665 unsigned int addr_size
= cu_header
->addr_size
;
5666 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5667 /* Base address selection entry. */
5678 found_base
= cu
->base_known
;
5679 base
= cu
->base_address
;
5681 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5682 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5684 complaint (&symfile_complaints
,
5685 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5689 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5691 /* Read in the largest possible address. */
5692 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5693 if ((marker
& mask
) == mask
)
5695 /* If we found the largest possible address, then
5696 read the base address. */
5697 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5698 buffer
+= 2 * addr_size
;
5699 offset
+= 2 * addr_size
;
5705 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5709 CORE_ADDR range_beginning
, range_end
;
5711 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5712 buffer
+= addr_size
;
5713 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5714 buffer
+= addr_size
;
5715 offset
+= 2 * addr_size
;
5717 /* An end of list marker is a pair of zero addresses. */
5718 if (range_beginning
== 0 && range_end
== 0)
5719 /* Found the end of list entry. */
5722 /* Each base address selection entry is a pair of 2 values.
5723 The first is the largest possible address, the second is
5724 the base address. Check for a base address here. */
5725 if ((range_beginning
& mask
) == mask
)
5727 /* If we found the largest possible address, then
5728 read the base address. */
5729 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5736 /* We have no valid base address for the ranges
5738 complaint (&symfile_complaints
,
5739 _("Invalid .debug_ranges data (no base address)"));
5743 range_beginning
+= base
;
5746 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5747 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5748 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
5751 /* FIXME: This is recording everything as a low-high
5752 segment of consecutive addresses. We should have a
5753 data structure for discontiguous block ranges
5757 low
= range_beginning
;
5763 if (range_beginning
< low
)
5764 low
= range_beginning
;
5765 if (range_end
> high
)
5771 /* If the first entry is an end-of-list marker, the range
5772 describes an empty scope, i.e. no instructions. */
5778 *high_return
= high
;
5782 /* Get low and high pc attributes from a die. Return 1 if the attributes
5783 are present and valid, otherwise, return 0. Return -1 if the range is
5784 discontinuous, i.e. derived from DW_AT_ranges information. */
5786 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5787 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5788 struct partial_symtab
*pst
)
5790 struct attribute
*attr
;
5795 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5798 high
= DW_ADDR (attr
);
5799 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5801 low
= DW_ADDR (attr
);
5803 /* Found high w/o low attribute. */
5806 /* Found consecutive range of addresses. */
5811 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5814 /* Value of the DW_AT_ranges attribute is the offset in the
5815 .debug_ranges section. */
5816 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5818 /* Found discontinuous range of addresses. */
5826 /* When using the GNU linker, .gnu.linkonce. sections are used to
5827 eliminate duplicate copies of functions and vtables and such.
5828 The linker will arbitrarily choose one and discard the others.
5829 The AT_*_pc values for such functions refer to local labels in
5830 these sections. If the section from that file was discarded, the
5831 labels are not in the output, so the relocs get a value of 0.
5832 If this is a discarded function, mark the pc bounds as invalid,
5833 so that GDB will ignore it. */
5834 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5842 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5843 its low and high PC addresses. Do nothing if these addresses could not
5844 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5845 and HIGHPC to the high address if greater than HIGHPC. */
5848 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5849 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5850 struct dwarf2_cu
*cu
)
5852 CORE_ADDR low
, high
;
5853 struct die_info
*child
= die
->child
;
5855 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5857 *lowpc
= min (*lowpc
, low
);
5858 *highpc
= max (*highpc
, high
);
5861 /* If the language does not allow nested subprograms (either inside
5862 subprograms or lexical blocks), we're done. */
5863 if (cu
->language
!= language_ada
)
5866 /* Check all the children of the given DIE. If it contains nested
5867 subprograms, then check their pc bounds. Likewise, we need to
5868 check lexical blocks as well, as they may also contain subprogram
5870 while (child
&& child
->tag
)
5872 if (child
->tag
== DW_TAG_subprogram
5873 || child
->tag
== DW_TAG_lexical_block
)
5874 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5875 child
= sibling_die (child
);
5879 /* Get the low and high pc's represented by the scope DIE, and store
5880 them in *LOWPC and *HIGHPC. If the correct values can't be
5881 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5884 get_scope_pc_bounds (struct die_info
*die
,
5885 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5886 struct dwarf2_cu
*cu
)
5888 CORE_ADDR best_low
= (CORE_ADDR
) -1;
5889 CORE_ADDR best_high
= (CORE_ADDR
) 0;
5890 CORE_ADDR current_low
, current_high
;
5892 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
5894 best_low
= current_low
;
5895 best_high
= current_high
;
5899 struct die_info
*child
= die
->child
;
5901 while (child
&& child
->tag
)
5903 switch (child
->tag
) {
5904 case DW_TAG_subprogram
:
5905 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
5907 case DW_TAG_namespace
:
5909 /* FIXME: carlton/2004-01-16: Should we do this for
5910 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5911 that current GCC's always emit the DIEs corresponding
5912 to definitions of methods of classes as children of a
5913 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5914 the DIEs giving the declarations, which could be
5915 anywhere). But I don't see any reason why the
5916 standards says that they have to be there. */
5917 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
5919 if (current_low
!= ((CORE_ADDR
) -1))
5921 best_low
= min (best_low
, current_low
);
5922 best_high
= max (best_high
, current_high
);
5930 child
= sibling_die (child
);
5935 *highpc
= best_high
;
5938 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5941 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
5942 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
5944 struct attribute
*attr
;
5946 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5949 CORE_ADDR high
= DW_ADDR (attr
);
5951 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5954 CORE_ADDR low
= DW_ADDR (attr
);
5956 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
5960 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5963 bfd
*obfd
= cu
->objfile
->obfd
;
5965 /* The value of the DW_AT_ranges attribute is the offset of the
5966 address range list in the .debug_ranges section. */
5967 unsigned long offset
= DW_UNSND (attr
);
5968 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5970 /* For some target architectures, but not others, the
5971 read_address function sign-extends the addresses it returns.
5972 To recognize base address selection entries, we need a
5974 unsigned int addr_size
= cu
->header
.addr_size
;
5975 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5977 /* The base address, to which the next pair is relative. Note
5978 that this 'base' is a DWARF concept: most entries in a range
5979 list are relative, to reduce the number of relocs against the
5980 debugging information. This is separate from this function's
5981 'baseaddr' argument, which GDB uses to relocate debugging
5982 information from a shared library based on the address at
5983 which the library was loaded. */
5984 CORE_ADDR base
= cu
->base_address
;
5985 int base_known
= cu
->base_known
;
5987 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
5988 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5990 complaint (&symfile_complaints
,
5991 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5998 unsigned int bytes_read
;
5999 CORE_ADDR start
, end
;
6001 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6002 buffer
+= bytes_read
;
6003 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6004 buffer
+= bytes_read
;
6006 /* Did we find the end of the range list? */
6007 if (start
== 0 && end
== 0)
6010 /* Did we find a base address selection entry? */
6011 else if ((start
& base_select_mask
) == base_select_mask
)
6017 /* We found an ordinary address range. */
6022 complaint (&symfile_complaints
,
6023 _("Invalid .debug_ranges data (no base address)"));
6027 record_block_range (block
,
6028 baseaddr
+ base
+ start
,
6029 baseaddr
+ base
+ end
- 1);
6035 /* Add an aggregate field to the field list. */
6038 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6039 struct dwarf2_cu
*cu
)
6041 struct objfile
*objfile
= cu
->objfile
;
6042 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6043 struct nextfield
*new_field
;
6044 struct attribute
*attr
;
6046 char *fieldname
= "";
6048 /* Allocate a new field list entry and link it in. */
6049 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6050 make_cleanup (xfree
, new_field
);
6051 memset (new_field
, 0, sizeof (struct nextfield
));
6053 if (die
->tag
== DW_TAG_inheritance
)
6055 new_field
->next
= fip
->baseclasses
;
6056 fip
->baseclasses
= new_field
;
6060 new_field
->next
= fip
->fields
;
6061 fip
->fields
= new_field
;
6065 /* Handle accessibility and virtuality of field.
6066 The default accessibility for members is public, the default
6067 accessibility for inheritance is private. */
6068 if (die
->tag
!= DW_TAG_inheritance
)
6069 new_field
->accessibility
= DW_ACCESS_public
;
6071 new_field
->accessibility
= DW_ACCESS_private
;
6072 new_field
->virtuality
= DW_VIRTUALITY_none
;
6074 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6076 new_field
->accessibility
= DW_UNSND (attr
);
6077 if (new_field
->accessibility
!= DW_ACCESS_public
)
6078 fip
->non_public_fields
= 1;
6079 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6081 new_field
->virtuality
= DW_UNSND (attr
);
6083 fp
= &new_field
->field
;
6085 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6087 /* Data member other than a C++ static data member. */
6089 /* Get type of field. */
6090 fp
->type
= die_type (die
, cu
);
6092 SET_FIELD_BITPOS (*fp
, 0);
6094 /* Get bit size of field (zero if none). */
6095 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6098 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6102 FIELD_BITSIZE (*fp
) = 0;
6105 /* Get bit offset of field. */
6106 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6109 int byte_offset
= 0;
6111 if (attr_form_is_section_offset (attr
))
6112 dwarf2_complex_location_expr_complaint ();
6113 else if (attr_form_is_constant (attr
))
6114 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6115 else if (attr_form_is_block (attr
))
6116 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6118 dwarf2_complex_location_expr_complaint ();
6120 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6122 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6125 if (gdbarch_bits_big_endian (gdbarch
))
6127 /* For big endian bits, the DW_AT_bit_offset gives the
6128 additional bit offset from the MSB of the containing
6129 anonymous object to the MSB of the field. We don't
6130 have to do anything special since we don't need to
6131 know the size of the anonymous object. */
6132 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6136 /* For little endian bits, compute the bit offset to the
6137 MSB of the anonymous object, subtract off the number of
6138 bits from the MSB of the field to the MSB of the
6139 object, and then subtract off the number of bits of
6140 the field itself. The result is the bit offset of
6141 the LSB of the field. */
6143 int bit_offset
= DW_UNSND (attr
);
6145 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6148 /* The size of the anonymous object containing
6149 the bit field is explicit, so use the
6150 indicated size (in bytes). */
6151 anonymous_size
= DW_UNSND (attr
);
6155 /* The size of the anonymous object containing
6156 the bit field must be inferred from the type
6157 attribute of the data member containing the
6159 anonymous_size
= TYPE_LENGTH (fp
->type
);
6161 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6162 - bit_offset
- FIELD_BITSIZE (*fp
);
6166 /* Get name of field. */
6167 fieldname
= dwarf2_name (die
, cu
);
6168 if (fieldname
== NULL
)
6171 /* The name is already allocated along with this objfile, so we don't
6172 need to duplicate it for the type. */
6173 fp
->name
= fieldname
;
6175 /* Change accessibility for artificial fields (e.g. virtual table
6176 pointer or virtual base class pointer) to private. */
6177 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6179 FIELD_ARTIFICIAL (*fp
) = 1;
6180 new_field
->accessibility
= DW_ACCESS_private
;
6181 fip
->non_public_fields
= 1;
6184 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6186 /* C++ static member. */
6188 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6189 is a declaration, but all versions of G++ as of this writing
6190 (so through at least 3.2.1) incorrectly generate
6191 DW_TAG_variable tags. */
6195 /* Get name of field. */
6196 fieldname
= dwarf2_name (die
, cu
);
6197 if (fieldname
== NULL
)
6200 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6202 /* Only create a symbol if this is an external value.
6203 new_symbol checks this and puts the value in the global symbol
6204 table, which we want. If it is not external, new_symbol
6205 will try to put the value in cu->list_in_scope which is wrong. */
6206 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6208 /* A static const member, not much different than an enum as far as
6209 we're concerned, except that we can support more types. */
6210 new_symbol (die
, NULL
, cu
);
6213 /* Get physical name. */
6214 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6216 /* The name is already allocated along with this objfile, so we don't
6217 need to duplicate it for the type. */
6218 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6219 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6220 FIELD_NAME (*fp
) = fieldname
;
6222 else if (die
->tag
== DW_TAG_inheritance
)
6224 /* C++ base class field. */
6225 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6228 int byte_offset
= 0;
6230 if (attr_form_is_section_offset (attr
))
6231 dwarf2_complex_location_expr_complaint ();
6232 else if (attr_form_is_constant (attr
))
6233 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6234 else if (attr_form_is_block (attr
))
6235 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6237 dwarf2_complex_location_expr_complaint ();
6239 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6241 FIELD_BITSIZE (*fp
) = 0;
6242 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6243 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6244 fip
->nbaseclasses
++;
6248 /* Add a typedef defined in the scope of the FIP's class. */
6251 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6252 struct dwarf2_cu
*cu
)
6254 struct objfile
*objfile
= cu
->objfile
;
6255 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6256 struct typedef_field_list
*new_field
;
6257 struct attribute
*attr
;
6258 struct typedef_field
*fp
;
6259 char *fieldname
= "";
6261 /* Allocate a new field list entry and link it in. */
6262 new_field
= xzalloc (sizeof (*new_field
));
6263 make_cleanup (xfree
, new_field
);
6265 gdb_assert (die
->tag
== DW_TAG_typedef
);
6267 fp
= &new_field
->field
;
6269 /* Get name of field. */
6270 fp
->name
= dwarf2_name (die
, cu
);
6271 if (fp
->name
== NULL
)
6274 fp
->type
= read_type_die (die
, cu
);
6276 new_field
->next
= fip
->typedef_field_list
;
6277 fip
->typedef_field_list
= new_field
;
6278 fip
->typedef_field_list_count
++;
6281 /* Create the vector of fields, and attach it to the type. */
6284 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6285 struct dwarf2_cu
*cu
)
6287 int nfields
= fip
->nfields
;
6289 /* Record the field count, allocate space for the array of fields,
6290 and create blank accessibility bitfields if necessary. */
6291 TYPE_NFIELDS (type
) = nfields
;
6292 TYPE_FIELDS (type
) = (struct field
*)
6293 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6294 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6296 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6298 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6300 TYPE_FIELD_PRIVATE_BITS (type
) =
6301 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6302 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6304 TYPE_FIELD_PROTECTED_BITS (type
) =
6305 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6306 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6308 /* We don't set TYPE_FIELD_IGNORE_BITS here. The DWARF reader
6309 never sets any bits in that array, so leaving it NULL lets us
6310 save a little memory. */
6313 /* If the type has baseclasses, allocate and clear a bit vector for
6314 TYPE_FIELD_VIRTUAL_BITS. */
6315 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6317 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6318 unsigned char *pointer
;
6320 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6321 pointer
= TYPE_ALLOC (type
, num_bytes
);
6322 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6323 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6324 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6327 /* Copy the saved-up fields into the field vector. Start from the head
6328 of the list, adding to the tail of the field array, so that they end
6329 up in the same order in the array in which they were added to the list. */
6330 while (nfields
-- > 0)
6332 struct nextfield
*fieldp
;
6336 fieldp
= fip
->fields
;
6337 fip
->fields
= fieldp
->next
;
6341 fieldp
= fip
->baseclasses
;
6342 fip
->baseclasses
= fieldp
->next
;
6345 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6346 switch (fieldp
->accessibility
)
6348 case DW_ACCESS_private
:
6349 if (cu
->language
!= language_ada
)
6350 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6353 case DW_ACCESS_protected
:
6354 if (cu
->language
!= language_ada
)
6355 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6358 case DW_ACCESS_public
:
6362 /* Unknown accessibility. Complain and treat it as public. */
6364 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6365 fieldp
->accessibility
);
6369 if (nfields
< fip
->nbaseclasses
)
6371 switch (fieldp
->virtuality
)
6373 case DW_VIRTUALITY_virtual
:
6374 case DW_VIRTUALITY_pure_virtual
:
6375 if (cu
->language
== language_ada
)
6376 error ("unexpected virtuality in component of Ada type");
6377 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6384 /* Add a member function to the proper fieldlist. */
6387 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6388 struct type
*type
, struct dwarf2_cu
*cu
)
6390 struct objfile
*objfile
= cu
->objfile
;
6391 struct attribute
*attr
;
6392 struct fnfieldlist
*flp
;
6394 struct fn_field
*fnp
;
6396 struct nextfnfield
*new_fnfield
;
6397 struct type
*this_type
;
6399 if (cu
->language
== language_ada
)
6400 error ("unexpected member function in Ada type");
6402 /* Get name of member function. */
6403 fieldname
= dwarf2_name (die
, cu
);
6404 if (fieldname
== NULL
)
6407 /* Look up member function name in fieldlist. */
6408 for (i
= 0; i
< fip
->nfnfields
; i
++)
6410 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6414 /* Create new list element if necessary. */
6415 if (i
< fip
->nfnfields
)
6416 flp
= &fip
->fnfieldlists
[i
];
6419 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6421 fip
->fnfieldlists
= (struct fnfieldlist
*)
6422 xrealloc (fip
->fnfieldlists
,
6423 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6424 * sizeof (struct fnfieldlist
));
6425 if (fip
->nfnfields
== 0)
6426 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6428 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6429 flp
->name
= fieldname
;
6432 i
= fip
->nfnfields
++;
6435 /* Create a new member function field and chain it to the field list
6437 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6438 make_cleanup (xfree
, new_fnfield
);
6439 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6440 new_fnfield
->next
= flp
->head
;
6441 flp
->head
= new_fnfield
;
6444 /* Fill in the member function field info. */
6445 fnp
= &new_fnfield
->fnfield
;
6447 /* Delay processing of the physname until later. */
6448 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6450 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6455 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6456 fnp
->physname
= physname
? physname
: "";
6459 fnp
->type
= alloc_type (objfile
);
6460 this_type
= read_type_die (die
, cu
);
6461 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6463 int nparams
= TYPE_NFIELDS (this_type
);
6465 /* TYPE is the domain of this method, and THIS_TYPE is the type
6466 of the method itself (TYPE_CODE_METHOD). */
6467 smash_to_method_type (fnp
->type
, type
,
6468 TYPE_TARGET_TYPE (this_type
),
6469 TYPE_FIELDS (this_type
),
6470 TYPE_NFIELDS (this_type
),
6471 TYPE_VARARGS (this_type
));
6473 /* Handle static member functions.
6474 Dwarf2 has no clean way to discern C++ static and non-static
6475 member functions. G++ helps GDB by marking the first
6476 parameter for non-static member functions (which is the
6477 this pointer) as artificial. We obtain this information
6478 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6479 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6480 fnp
->voffset
= VOFFSET_STATIC
;
6483 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6484 dwarf2_full_name (fieldname
, die
, cu
));
6486 /* Get fcontext from DW_AT_containing_type if present. */
6487 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6488 fnp
->fcontext
= die_containing_type (die
, cu
);
6490 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6491 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6493 /* Get accessibility. */
6494 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6497 switch (DW_UNSND (attr
))
6499 case DW_ACCESS_private
:
6500 fnp
->is_private
= 1;
6502 case DW_ACCESS_protected
:
6503 fnp
->is_protected
= 1;
6508 /* Check for artificial methods. */
6509 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6510 if (attr
&& DW_UNSND (attr
) != 0)
6511 fnp
->is_artificial
= 1;
6513 /* Get index in virtual function table if it is a virtual member
6514 function. For older versions of GCC, this is an offset in the
6515 appropriate virtual table, as specified by DW_AT_containing_type.
6516 For everyone else, it is an expression to be evaluated relative
6517 to the object address. */
6519 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6522 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6524 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6526 /* Old-style GCC. */
6527 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6529 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6530 || (DW_BLOCK (attr
)->size
> 1
6531 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6532 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6534 struct dwarf_block blk
;
6537 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6539 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6540 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6541 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6542 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6543 dwarf2_complex_location_expr_complaint ();
6545 fnp
->voffset
/= cu
->header
.addr_size
;
6549 dwarf2_complex_location_expr_complaint ();
6552 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6554 else if (attr_form_is_section_offset (attr
))
6556 dwarf2_complex_location_expr_complaint ();
6560 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6566 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6567 if (attr
&& DW_UNSND (attr
))
6569 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6570 complaint (&symfile_complaints
,
6571 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6572 fieldname
, die
->offset
);
6573 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6574 TYPE_CPLUS_DYNAMIC (type
) = 1;
6579 /* Create the vector of member function fields, and attach it to the type. */
6582 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6583 struct dwarf2_cu
*cu
)
6585 struct fnfieldlist
*flp
;
6586 int total_length
= 0;
6589 if (cu
->language
== language_ada
)
6590 error ("unexpected member functions in Ada type");
6592 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6593 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6594 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6596 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6598 struct nextfnfield
*nfp
= flp
->head
;
6599 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6602 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6603 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6604 fn_flp
->fn_fields
= (struct fn_field
*)
6605 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6606 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6607 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6609 total_length
+= flp
->length
;
6612 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6613 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6616 /* Returns non-zero if NAME is the name of a vtable member in CU's
6617 language, zero otherwise. */
6619 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6621 static const char vptr
[] = "_vptr";
6622 static const char vtable
[] = "vtable";
6624 /* Look for the C++ and Java forms of the vtable. */
6625 if ((cu
->language
== language_java
6626 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6627 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6628 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6634 /* GCC outputs unnamed structures that are really pointers to member
6635 functions, with the ABI-specified layout. If TYPE describes
6636 such a structure, smash it into a member function type.
6638 GCC shouldn't do this; it should just output pointer to member DIEs.
6639 This is GCC PR debug/28767. */
6642 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6644 struct type
*pfn_type
, *domain_type
, *new_type
;
6646 /* Check for a structure with no name and two children. */
6647 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6650 /* Check for __pfn and __delta members. */
6651 if (TYPE_FIELD_NAME (type
, 0) == NULL
6652 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6653 || TYPE_FIELD_NAME (type
, 1) == NULL
6654 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6657 /* Find the type of the method. */
6658 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6659 if (pfn_type
== NULL
6660 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6661 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6664 /* Look for the "this" argument. */
6665 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6666 if (TYPE_NFIELDS (pfn_type
) == 0
6667 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6668 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6671 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6672 new_type
= alloc_type (objfile
);
6673 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6674 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6675 TYPE_VARARGS (pfn_type
));
6676 smash_to_methodptr_type (type
, new_type
);
6679 /* Called when we find the DIE that starts a structure or union scope
6680 (definition) to process all dies that define the members of the
6683 NOTE: we need to call struct_type regardless of whether or not the
6684 DIE has an at_name attribute, since it might be an anonymous
6685 structure or union. This gets the type entered into our set of
6688 However, if the structure is incomplete (an opaque struct/union)
6689 then suppress creating a symbol table entry for it since gdb only
6690 wants to find the one with the complete definition. Note that if
6691 it is complete, we just call new_symbol, which does it's own
6692 checking about whether the struct/union is anonymous or not (and
6693 suppresses creating a symbol table entry itself). */
6695 static struct type
*
6696 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6698 struct objfile
*objfile
= cu
->objfile
;
6700 struct attribute
*attr
;
6702 struct cleanup
*back_to
;
6704 /* If the definition of this type lives in .debug_types, read that type.
6705 Don't follow DW_AT_specification though, that will take us back up
6706 the chain and we want to go down. */
6707 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6710 struct dwarf2_cu
*type_cu
= cu
;
6711 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6713 /* We could just recurse on read_structure_type, but we need to call
6714 get_die_type to ensure only one type for this DIE is created.
6715 This is important, for example, because for c++ classes we need
6716 TYPE_NAME set which is only done by new_symbol. Blech. */
6717 type
= read_type_die (type_die
, type_cu
);
6719 /* TYPE_CU may not be the same as CU.
6720 Ensure TYPE is recorded in CU's type_hash table. */
6721 return set_die_type (die
, type
, cu
);
6724 back_to
= make_cleanup (null_cleanup
, 0);
6726 type
= alloc_type (objfile
);
6727 INIT_CPLUS_SPECIFIC (type
);
6729 name
= dwarf2_name (die
, cu
);
6732 if (cu
->language
== language_cplus
6733 || cu
->language
== language_java
)
6735 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6737 /* dwarf2_full_name might have already finished building the DIE's
6738 type. If so, there is no need to continue. */
6739 if (get_die_type (die
, cu
) != NULL
)
6740 return get_die_type (die
, cu
);
6742 TYPE_TAG_NAME (type
) = full_name
;
6743 if (die
->tag
== DW_TAG_structure_type
6744 || die
->tag
== DW_TAG_class_type
)
6745 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6749 /* The name is already allocated along with this objfile, so
6750 we don't need to duplicate it for the type. */
6751 TYPE_TAG_NAME (type
) = (char *) name
;
6752 if (die
->tag
== DW_TAG_class_type
)
6753 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6757 if (die
->tag
== DW_TAG_structure_type
)
6759 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6761 else if (die
->tag
== DW_TAG_union_type
)
6763 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6767 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6770 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6771 TYPE_DECLARED_CLASS (type
) = 1;
6773 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6776 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6780 TYPE_LENGTH (type
) = 0;
6783 TYPE_STUB_SUPPORTED (type
) = 1;
6784 if (die_is_declaration (die
, cu
))
6785 TYPE_STUB (type
) = 1;
6786 else if (attr
== NULL
&& die
->child
== NULL
6787 && producer_is_realview (cu
->producer
))
6788 /* RealView does not output the required DW_AT_declaration
6789 on incomplete types. */
6790 TYPE_STUB (type
) = 1;
6792 /* We need to add the type field to the die immediately so we don't
6793 infinitely recurse when dealing with pointers to the structure
6794 type within the structure itself. */
6795 set_die_type (die
, type
, cu
);
6797 /* set_die_type should be already done. */
6798 set_descriptive_type (type
, die
, cu
);
6800 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6802 struct field_info fi
;
6803 struct die_info
*child_die
;
6804 VEC (symbolp
) *template_args
= NULL
;
6806 memset (&fi
, 0, sizeof (struct field_info
));
6808 child_die
= die
->child
;
6810 while (child_die
&& child_die
->tag
)
6812 if (child_die
->tag
== DW_TAG_member
6813 || child_die
->tag
== DW_TAG_variable
)
6815 /* NOTE: carlton/2002-11-05: A C++ static data member
6816 should be a DW_TAG_member that is a declaration, but
6817 all versions of G++ as of this writing (so through at
6818 least 3.2.1) incorrectly generate DW_TAG_variable
6819 tags for them instead. */
6820 dwarf2_add_field (&fi
, child_die
, cu
);
6822 else if (child_die
->tag
== DW_TAG_subprogram
)
6824 /* C++ member function. */
6825 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6827 else if (child_die
->tag
== DW_TAG_inheritance
)
6829 /* C++ base class field. */
6830 dwarf2_add_field (&fi
, child_die
, cu
);
6832 else if (child_die
->tag
== DW_TAG_typedef
)
6833 dwarf2_add_typedef (&fi
, child_die
, cu
);
6834 else if (child_die
->tag
== DW_TAG_template_type_param
6835 || child_die
->tag
== DW_TAG_template_value_param
)
6837 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6839 VEC_safe_push (symbolp
, template_args
, arg
);
6842 child_die
= sibling_die (child_die
);
6845 /* Attach template arguments to type. */
6846 if (! VEC_empty (symbolp
, template_args
))
6848 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6849 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6850 = VEC_length (symbolp
, template_args
);
6851 TYPE_TEMPLATE_ARGUMENTS (type
)
6852 = obstack_alloc (&objfile
->objfile_obstack
,
6853 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6854 * sizeof (struct symbol
*)));
6855 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6856 VEC_address (symbolp
, template_args
),
6857 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6858 * sizeof (struct symbol
*)));
6859 VEC_free (symbolp
, template_args
);
6862 /* Attach fields and member functions to the type. */
6864 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
6867 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
6869 /* Get the type which refers to the base class (possibly this
6870 class itself) which contains the vtable pointer for the current
6871 class from the DW_AT_containing_type attribute. This use of
6872 DW_AT_containing_type is a GNU extension. */
6874 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6876 struct type
*t
= die_containing_type (die
, cu
);
6878 TYPE_VPTR_BASETYPE (type
) = t
;
6883 /* Our own class provides vtbl ptr. */
6884 for (i
= TYPE_NFIELDS (t
) - 1;
6885 i
>= TYPE_N_BASECLASSES (t
);
6888 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
6890 if (is_vtable_name (fieldname
, cu
))
6892 TYPE_VPTR_FIELDNO (type
) = i
;
6897 /* Complain if virtual function table field not found. */
6898 if (i
< TYPE_N_BASECLASSES (t
))
6899 complaint (&symfile_complaints
,
6900 _("virtual function table pointer not found when defining class '%s'"),
6901 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
6906 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
6909 else if (cu
->producer
6910 && strncmp (cu
->producer
,
6911 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6913 /* The IBM XLC compiler does not provide direct indication
6914 of the containing type, but the vtable pointer is
6915 always named __vfp. */
6919 for (i
= TYPE_NFIELDS (type
) - 1;
6920 i
>= TYPE_N_BASECLASSES (type
);
6923 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
6925 TYPE_VPTR_FIELDNO (type
) = i
;
6926 TYPE_VPTR_BASETYPE (type
) = type
;
6933 /* Copy fi.typedef_field_list linked list elements content into the
6934 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6935 if (fi
.typedef_field_list
)
6937 int i
= fi
.typedef_field_list_count
;
6939 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6940 TYPE_TYPEDEF_FIELD_ARRAY (type
)
6941 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
6942 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
6944 /* Reverse the list order to keep the debug info elements order. */
6947 struct typedef_field
*dest
, *src
;
6949 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
6950 src
= &fi
.typedef_field_list
->field
;
6951 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
6957 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
6959 do_cleanups (back_to
);
6964 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6966 struct die_info
*child_die
= die
->child
;
6967 struct type
*this_type
;
6969 this_type
= get_die_type (die
, cu
);
6970 if (this_type
== NULL
)
6971 this_type
= read_structure_type (die
, cu
);
6973 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6974 snapshots) has been known to create a die giving a declaration
6975 for a class that has, as a child, a die giving a definition for a
6976 nested class. So we have to process our children even if the
6977 current die is a declaration. Normally, of course, a declaration
6978 won't have any children at all. */
6980 while (child_die
!= NULL
&& child_die
->tag
)
6982 if (child_die
->tag
== DW_TAG_member
6983 || child_die
->tag
== DW_TAG_variable
6984 || child_die
->tag
== DW_TAG_inheritance
6985 || child_die
->tag
== DW_TAG_template_value_param
6986 || child_die
->tag
== DW_TAG_template_type_param
)
6991 process_die (child_die
, cu
);
6993 child_die
= sibling_die (child_die
);
6996 /* Do not consider external references. According to the DWARF standard,
6997 these DIEs are identified by the fact that they have no byte_size
6998 attribute, and a declaration attribute. */
6999 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7000 || !die_is_declaration (die
, cu
))
7001 new_symbol (die
, this_type
, cu
);
7004 /* Given a DW_AT_enumeration_type die, set its type. We do not
7005 complete the type's fields yet, or create any symbols. */
7007 static struct type
*
7008 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7010 struct objfile
*objfile
= cu
->objfile
;
7012 struct attribute
*attr
;
7015 /* If the definition of this type lives in .debug_types, read that type.
7016 Don't follow DW_AT_specification though, that will take us back up
7017 the chain and we want to go down. */
7018 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7021 struct dwarf2_cu
*type_cu
= cu
;
7022 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7024 type
= read_type_die (type_die
, type_cu
);
7026 /* TYPE_CU may not be the same as CU.
7027 Ensure TYPE is recorded in CU's type_hash table. */
7028 return set_die_type (die
, type
, cu
);
7031 type
= alloc_type (objfile
);
7033 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7034 name
= dwarf2_full_name (NULL
, die
, cu
);
7036 TYPE_TAG_NAME (type
) = (char *) name
;
7038 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7041 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7045 TYPE_LENGTH (type
) = 0;
7048 /* The enumeration DIE can be incomplete. In Ada, any type can be
7049 declared as private in the package spec, and then defined only
7050 inside the package body. Such types are known as Taft Amendment
7051 Types. When another package uses such a type, an incomplete DIE
7052 may be generated by the compiler. */
7053 if (die_is_declaration (die
, cu
))
7054 TYPE_STUB (type
) = 1;
7056 return set_die_type (die
, type
, cu
);
7059 /* Given a pointer to a die which begins an enumeration, process all
7060 the dies that define the members of the enumeration, and create the
7061 symbol for the enumeration type.
7063 NOTE: We reverse the order of the element list. */
7066 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7068 struct type
*this_type
;
7070 this_type
= get_die_type (die
, cu
);
7071 if (this_type
== NULL
)
7072 this_type
= read_enumeration_type (die
, cu
);
7074 if (die
->child
!= NULL
)
7076 struct die_info
*child_die
;
7078 struct field
*fields
= NULL
;
7080 int unsigned_enum
= 1;
7083 child_die
= die
->child
;
7084 while (child_die
&& child_die
->tag
)
7086 if (child_die
->tag
!= DW_TAG_enumerator
)
7088 process_die (child_die
, cu
);
7092 name
= dwarf2_name (child_die
, cu
);
7095 sym
= new_symbol (child_die
, this_type
, cu
);
7096 if (SYMBOL_VALUE (sym
) < 0)
7099 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7101 fields
= (struct field
*)
7103 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7104 * sizeof (struct field
));
7107 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7108 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7109 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7110 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7116 child_die
= sibling_die (child_die
);
7121 TYPE_NFIELDS (this_type
) = num_fields
;
7122 TYPE_FIELDS (this_type
) = (struct field
*)
7123 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7124 memcpy (TYPE_FIELDS (this_type
), fields
,
7125 sizeof (struct field
) * num_fields
);
7129 TYPE_UNSIGNED (this_type
) = 1;
7132 new_symbol (die
, this_type
, cu
);
7135 /* Extract all information from a DW_TAG_array_type DIE and put it in
7136 the DIE's type field. For now, this only handles one dimensional
7139 static struct type
*
7140 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7142 struct objfile
*objfile
= cu
->objfile
;
7143 struct die_info
*child_die
;
7145 struct type
*element_type
, *range_type
, *index_type
;
7146 struct type
**range_types
= NULL
;
7147 struct attribute
*attr
;
7149 struct cleanup
*back_to
;
7152 element_type
= die_type (die
, cu
);
7154 /* The die_type call above may have already set the type for this DIE. */
7155 type
= get_die_type (die
, cu
);
7159 /* Irix 6.2 native cc creates array types without children for
7160 arrays with unspecified length. */
7161 if (die
->child
== NULL
)
7163 index_type
= objfile_type (objfile
)->builtin_int
;
7164 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7165 type
= create_array_type (NULL
, element_type
, range_type
);
7166 return set_die_type (die
, type
, cu
);
7169 back_to
= make_cleanup (null_cleanup
, NULL
);
7170 child_die
= die
->child
;
7171 while (child_die
&& child_die
->tag
)
7173 if (child_die
->tag
== DW_TAG_subrange_type
)
7175 struct type
*child_type
= read_type_die (child_die
, cu
);
7177 if (child_type
!= NULL
)
7179 /* The range type was succesfully read. Save it for
7180 the array type creation. */
7181 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7183 range_types
= (struct type
**)
7184 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7185 * sizeof (struct type
*));
7187 make_cleanup (free_current_contents
, &range_types
);
7189 range_types
[ndim
++] = child_type
;
7192 child_die
= sibling_die (child_die
);
7195 /* Dwarf2 dimensions are output from left to right, create the
7196 necessary array types in backwards order. */
7198 type
= element_type
;
7200 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7205 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7210 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7213 /* Understand Dwarf2 support for vector types (like they occur on
7214 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7215 array type. This is not part of the Dwarf2/3 standard yet, but a
7216 custom vendor extension. The main difference between a regular
7217 array and the vector variant is that vectors are passed by value
7219 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7221 make_vector_type (type
);
7223 name
= dwarf2_name (die
, cu
);
7225 TYPE_NAME (type
) = name
;
7227 /* Install the type in the die. */
7228 set_die_type (die
, type
, cu
);
7230 /* set_die_type should be already done. */
7231 set_descriptive_type (type
, die
, cu
);
7233 do_cleanups (back_to
);
7238 static enum dwarf_array_dim_ordering
7239 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7241 struct attribute
*attr
;
7243 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7245 if (attr
) return DW_SND (attr
);
7248 GNU F77 is a special case, as at 08/2004 array type info is the
7249 opposite order to the dwarf2 specification, but data is still
7250 laid out as per normal fortran.
7252 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7256 if (cu
->language
== language_fortran
7257 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7259 return DW_ORD_row_major
;
7262 switch (cu
->language_defn
->la_array_ordering
)
7264 case array_column_major
:
7265 return DW_ORD_col_major
;
7266 case array_row_major
:
7268 return DW_ORD_row_major
;
7272 /* Extract all information from a DW_TAG_set_type DIE and put it in
7273 the DIE's type field. */
7275 static struct type
*
7276 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7278 struct type
*domain_type
, *set_type
;
7279 struct attribute
*attr
;
7281 domain_type
= die_type (die
, cu
);
7283 /* The die_type call above may have already set the type for this DIE. */
7284 set_type
= get_die_type (die
, cu
);
7288 set_type
= create_set_type (NULL
, domain_type
);
7290 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7292 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7294 return set_die_type (die
, set_type
, cu
);
7297 /* First cut: install each common block member as a global variable. */
7300 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7302 struct die_info
*child_die
;
7303 struct attribute
*attr
;
7305 CORE_ADDR base
= (CORE_ADDR
) 0;
7307 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7310 /* Support the .debug_loc offsets */
7311 if (attr_form_is_block (attr
))
7313 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7315 else if (attr_form_is_section_offset (attr
))
7317 dwarf2_complex_location_expr_complaint ();
7321 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7322 "common block member");
7325 if (die
->child
!= NULL
)
7327 child_die
= die
->child
;
7328 while (child_die
&& child_die
->tag
)
7330 sym
= new_symbol (child_die
, NULL
, cu
);
7331 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7334 CORE_ADDR byte_offset
= 0;
7336 if (attr_form_is_section_offset (attr
))
7337 dwarf2_complex_location_expr_complaint ();
7338 else if (attr_form_is_constant (attr
))
7339 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7340 else if (attr_form_is_block (attr
))
7341 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7343 dwarf2_complex_location_expr_complaint ();
7345 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7346 add_symbol_to_list (sym
, &global_symbols
);
7348 child_die
= sibling_die (child_die
);
7353 /* Create a type for a C++ namespace. */
7355 static struct type
*
7356 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7358 struct objfile
*objfile
= cu
->objfile
;
7359 const char *previous_prefix
, *name
;
7363 /* For extensions, reuse the type of the original namespace. */
7364 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7366 struct die_info
*ext_die
;
7367 struct dwarf2_cu
*ext_cu
= cu
;
7369 ext_die
= dwarf2_extension (die
, &ext_cu
);
7370 type
= read_type_die (ext_die
, ext_cu
);
7372 /* EXT_CU may not be the same as CU.
7373 Ensure TYPE is recorded in CU's type_hash table. */
7374 return set_die_type (die
, type
, cu
);
7377 name
= namespace_name (die
, &is_anonymous
, cu
);
7379 /* Now build the name of the current namespace. */
7381 previous_prefix
= determine_prefix (die
, cu
);
7382 if (previous_prefix
[0] != '\0')
7383 name
= typename_concat (&objfile
->objfile_obstack
,
7384 previous_prefix
, name
, 0, cu
);
7386 /* Create the type. */
7387 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7389 TYPE_NAME (type
) = (char *) name
;
7390 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7392 return set_die_type (die
, type
, cu
);
7395 /* Read a C++ namespace. */
7398 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7400 struct objfile
*objfile
= cu
->objfile
;
7404 /* Add a symbol associated to this if we haven't seen the namespace
7405 before. Also, add a using directive if it's an anonymous
7408 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7412 type
= read_type_die (die
, cu
);
7413 new_symbol (die
, type
, cu
);
7415 name
= namespace_name (die
, &is_anonymous
, cu
);
7418 const char *previous_prefix
= determine_prefix (die
, cu
);
7420 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7421 NULL
, &objfile
->objfile_obstack
);
7425 if (die
->child
!= NULL
)
7427 struct die_info
*child_die
= die
->child
;
7429 while (child_die
&& child_die
->tag
)
7431 process_die (child_die
, cu
);
7432 child_die
= sibling_die (child_die
);
7437 /* Read a Fortran module as type. This DIE can be only a declaration used for
7438 imported module. Still we need that type as local Fortran "use ... only"
7439 declaration imports depend on the created type in determine_prefix. */
7441 static struct type
*
7442 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7444 struct objfile
*objfile
= cu
->objfile
;
7448 module_name
= dwarf2_name (die
, cu
);
7450 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
7452 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7454 /* determine_prefix uses TYPE_TAG_NAME. */
7455 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7457 return set_die_type (die
, type
, cu
);
7460 /* Read a Fortran module. */
7463 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7465 struct die_info
*child_die
= die
->child
;
7467 while (child_die
&& child_die
->tag
)
7469 process_die (child_die
, cu
);
7470 child_die
= sibling_die (child_die
);
7474 /* Return the name of the namespace represented by DIE. Set
7475 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7479 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7481 struct die_info
*current_die
;
7482 const char *name
= NULL
;
7484 /* Loop through the extensions until we find a name. */
7486 for (current_die
= die
;
7487 current_die
!= NULL
;
7488 current_die
= dwarf2_extension (die
, &cu
))
7490 name
= dwarf2_name (current_die
, cu
);
7495 /* Is it an anonymous namespace? */
7497 *is_anonymous
= (name
== NULL
);
7499 name
= "(anonymous namespace)";
7504 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7505 the user defined type vector. */
7507 static struct type
*
7508 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7510 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7511 struct comp_unit_head
*cu_header
= &cu
->header
;
7513 struct attribute
*attr_byte_size
;
7514 struct attribute
*attr_address_class
;
7515 int byte_size
, addr_class
;
7516 struct type
*target_type
;
7518 target_type
= die_type (die
, cu
);
7520 /* The die_type call above may have already set the type for this DIE. */
7521 type
= get_die_type (die
, cu
);
7525 type
= lookup_pointer_type (target_type
);
7527 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7529 byte_size
= DW_UNSND (attr_byte_size
);
7531 byte_size
= cu_header
->addr_size
;
7533 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7534 if (attr_address_class
)
7535 addr_class
= DW_UNSND (attr_address_class
);
7537 addr_class
= DW_ADDR_none
;
7539 /* If the pointer size or address class is different than the
7540 default, create a type variant marked as such and set the
7541 length accordingly. */
7542 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7544 if (gdbarch_address_class_type_flags_p (gdbarch
))
7548 type_flags
= gdbarch_address_class_type_flags
7549 (gdbarch
, byte_size
, addr_class
);
7550 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7552 type
= make_type_with_address_space (type
, type_flags
);
7554 else if (TYPE_LENGTH (type
) != byte_size
)
7556 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
7560 /* Should we also complain about unhandled address classes? */
7564 TYPE_LENGTH (type
) = byte_size
;
7565 return set_die_type (die
, type
, cu
);
7568 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7569 the user defined type vector. */
7571 static struct type
*
7572 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7575 struct type
*to_type
;
7576 struct type
*domain
;
7578 to_type
= die_type (die
, cu
);
7579 domain
= die_containing_type (die
, cu
);
7581 /* The calls above may have already set the type for this DIE. */
7582 type
= get_die_type (die
, cu
);
7586 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7587 type
= lookup_methodptr_type (to_type
);
7589 type
= lookup_memberptr_type (to_type
, domain
);
7591 return set_die_type (die
, type
, cu
);
7594 /* Extract all information from a DW_TAG_reference_type DIE and add to
7595 the user defined type vector. */
7597 static struct type
*
7598 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7600 struct comp_unit_head
*cu_header
= &cu
->header
;
7601 struct type
*type
, *target_type
;
7602 struct attribute
*attr
;
7604 target_type
= die_type (die
, cu
);
7606 /* The die_type call above may have already set the type for this DIE. */
7607 type
= get_die_type (die
, cu
);
7611 type
= lookup_reference_type (target_type
);
7612 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7615 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7619 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7621 return set_die_type (die
, type
, cu
);
7624 static struct type
*
7625 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7627 struct type
*base_type
, *cv_type
;
7629 base_type
= die_type (die
, cu
);
7631 /* The die_type call above may have already set the type for this DIE. */
7632 cv_type
= get_die_type (die
, cu
);
7636 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7637 return set_die_type (die
, cv_type
, cu
);
7640 static struct type
*
7641 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7643 struct type
*base_type
, *cv_type
;
7645 base_type
= die_type (die
, cu
);
7647 /* The die_type call above may have already set the type for this DIE. */
7648 cv_type
= get_die_type (die
, cu
);
7652 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7653 return set_die_type (die
, cv_type
, cu
);
7656 /* Extract all information from a DW_TAG_string_type DIE and add to
7657 the user defined type vector. It isn't really a user defined type,
7658 but it behaves like one, with other DIE's using an AT_user_def_type
7659 attribute to reference it. */
7661 static struct type
*
7662 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7664 struct objfile
*objfile
= cu
->objfile
;
7665 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7666 struct type
*type
, *range_type
, *index_type
, *char_type
;
7667 struct attribute
*attr
;
7668 unsigned int length
;
7670 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7673 length
= DW_UNSND (attr
);
7677 /* check for the DW_AT_byte_size attribute */
7678 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7681 length
= DW_UNSND (attr
);
7689 index_type
= objfile_type (objfile
)->builtin_int
;
7690 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7691 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7692 type
= create_string_type (NULL
, char_type
, range_type
);
7694 return set_die_type (die
, type
, cu
);
7697 /* Handle DIES due to C code like:
7701 int (*funcp)(int a, long l);
7705 ('funcp' generates a DW_TAG_subroutine_type DIE)
7708 static struct type
*
7709 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7711 struct type
*type
; /* Type that this function returns */
7712 struct type
*ftype
; /* Function that returns above type */
7713 struct attribute
*attr
;
7715 type
= die_type (die
, cu
);
7717 /* The die_type call above may have already set the type for this DIE. */
7718 ftype
= get_die_type (die
, cu
);
7722 ftype
= lookup_function_type (type
);
7724 /* All functions in C++, Pascal and Java have prototypes. */
7725 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7726 if ((attr
&& (DW_UNSND (attr
) != 0))
7727 || cu
->language
== language_cplus
7728 || cu
->language
== language_java
7729 || cu
->language
== language_pascal
)
7730 TYPE_PROTOTYPED (ftype
) = 1;
7731 else if (producer_is_realview (cu
->producer
))
7732 /* RealView does not emit DW_AT_prototyped. We can not
7733 distinguish prototyped and unprototyped functions; default to
7734 prototyped, since that is more common in modern code (and
7735 RealView warns about unprototyped functions). */
7736 TYPE_PROTOTYPED (ftype
) = 1;
7738 /* Store the calling convention in the type if it's available in
7739 the subroutine die. Otherwise set the calling convention to
7740 the default value DW_CC_normal. */
7741 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7742 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7744 /* We need to add the subroutine type to the die immediately so
7745 we don't infinitely recurse when dealing with parameters
7746 declared as the same subroutine type. */
7747 set_die_type (die
, ftype
, cu
);
7749 if (die
->child
!= NULL
)
7751 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7752 struct die_info
*child_die
;
7753 int nparams
, iparams
;
7755 /* Count the number of parameters.
7756 FIXME: GDB currently ignores vararg functions, but knows about
7757 vararg member functions. */
7759 child_die
= die
->child
;
7760 while (child_die
&& child_die
->tag
)
7762 if (child_die
->tag
== DW_TAG_formal_parameter
)
7764 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7765 TYPE_VARARGS (ftype
) = 1;
7766 child_die
= sibling_die (child_die
);
7769 /* Allocate storage for parameters and fill them in. */
7770 TYPE_NFIELDS (ftype
) = nparams
;
7771 TYPE_FIELDS (ftype
) = (struct field
*)
7772 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7774 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7775 even if we error out during the parameters reading below. */
7776 for (iparams
= 0; iparams
< nparams
; iparams
++)
7777 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7780 child_die
= die
->child
;
7781 while (child_die
&& child_die
->tag
)
7783 if (child_die
->tag
== DW_TAG_formal_parameter
)
7785 struct type
*arg_type
;
7787 /* DWARF version 2 has no clean way to discern C++
7788 static and non-static member functions. G++ helps
7789 GDB by marking the first parameter for non-static
7790 member functions (which is the this pointer) as
7791 artificial. We pass this information to
7792 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7794 DWARF version 3 added DW_AT_object_pointer, which GCC
7795 4.5 does not yet generate. */
7796 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7798 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7801 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7803 /* GCC/43521: In java, the formal parameter
7804 "this" is sometimes not marked with DW_AT_artificial. */
7805 if (cu
->language
== language_java
)
7807 const char *name
= dwarf2_name (child_die
, cu
);
7809 if (name
&& !strcmp (name
, "this"))
7810 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7813 arg_type
= die_type (child_die
, cu
);
7815 /* RealView does not mark THIS as const, which the testsuite
7816 expects. GCC marks THIS as const in method definitions,
7817 but not in the class specifications (GCC PR 43053). */
7818 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7819 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7822 struct dwarf2_cu
*arg_cu
= cu
;
7823 const char *name
= dwarf2_name (child_die
, cu
);
7825 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7828 /* If the compiler emits this, use it. */
7829 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
7832 else if (name
&& strcmp (name
, "this") == 0)
7833 /* Function definitions will have the argument names. */
7835 else if (name
== NULL
&& iparams
== 0)
7836 /* Declarations may not have the names, so like
7837 elsewhere in GDB, assume an artificial first
7838 argument is "this". */
7842 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
7846 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
7849 child_die
= sibling_die (child_die
);
7856 static struct type
*
7857 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
7859 struct objfile
*objfile
= cu
->objfile
;
7860 const char *name
= NULL
;
7861 struct type
*this_type
;
7863 name
= dwarf2_full_name (NULL
, die
, cu
);
7864 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
7865 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
7866 TYPE_NAME (this_type
) = (char *) name
;
7867 set_die_type (die
, this_type
, cu
);
7868 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
7872 /* Find a representation of a given base type and install
7873 it in the TYPE field of the die. */
7875 static struct type
*
7876 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7878 struct objfile
*objfile
= cu
->objfile
;
7880 struct attribute
*attr
;
7881 int encoding
= 0, size
= 0;
7883 enum type_code code
= TYPE_CODE_INT
;
7885 struct type
*target_type
= NULL
;
7887 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
7890 encoding
= DW_UNSND (attr
);
7892 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7895 size
= DW_UNSND (attr
);
7897 name
= dwarf2_name (die
, cu
);
7900 complaint (&symfile_complaints
,
7901 _("DW_AT_name missing from DW_TAG_base_type"));
7906 case DW_ATE_address
:
7907 /* Turn DW_ATE_address into a void * pointer. */
7908 code
= TYPE_CODE_PTR
;
7909 type_flags
|= TYPE_FLAG_UNSIGNED
;
7910 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
7912 case DW_ATE_boolean
:
7913 code
= TYPE_CODE_BOOL
;
7914 type_flags
|= TYPE_FLAG_UNSIGNED
;
7916 case DW_ATE_complex_float
:
7917 code
= TYPE_CODE_COMPLEX
;
7918 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
7920 case DW_ATE_decimal_float
:
7921 code
= TYPE_CODE_DECFLOAT
;
7924 code
= TYPE_CODE_FLT
;
7928 case DW_ATE_unsigned
:
7929 type_flags
|= TYPE_FLAG_UNSIGNED
;
7931 case DW_ATE_signed_char
:
7932 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7933 || cu
->language
== language_pascal
)
7934 code
= TYPE_CODE_CHAR
;
7936 case DW_ATE_unsigned_char
:
7937 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7938 || cu
->language
== language_pascal
)
7939 code
= TYPE_CODE_CHAR
;
7940 type_flags
|= TYPE_FLAG_UNSIGNED
;
7943 /* We just treat this as an integer and then recognize the
7944 type by name elsewhere. */
7948 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
7949 dwarf_type_encoding_name (encoding
));
7953 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
7954 TYPE_NAME (type
) = name
;
7955 TYPE_TARGET_TYPE (type
) = target_type
;
7957 if (name
&& strcmp (name
, "char") == 0)
7958 TYPE_NOSIGN (type
) = 1;
7960 return set_die_type (die
, type
, cu
);
7963 /* Read the given DW_AT_subrange DIE. */
7965 static struct type
*
7966 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7968 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7969 struct type
*base_type
;
7970 struct type
*range_type
;
7971 struct attribute
*attr
;
7975 LONGEST negative_mask
;
7977 base_type
= die_type (die
, cu
);
7978 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7979 check_typedef (base_type
);
7981 /* The die_type call above may have already set the type for this DIE. */
7982 range_type
= get_die_type (die
, cu
);
7986 if (cu
->language
== language_fortran
)
7988 /* FORTRAN implies a lower bound of 1, if not given. */
7992 /* FIXME: For variable sized arrays either of these could be
7993 a variable rather than a constant value. We'll allow it,
7994 but we don't know how to handle it. */
7995 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
7997 low
= dwarf2_get_attr_constant_value (attr
, 0);
7999 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8002 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
8004 /* GCC encodes arrays with unspecified or dynamic length
8005 with a DW_FORM_block1 attribute or a reference attribute.
8006 FIXME: GDB does not yet know how to handle dynamic
8007 arrays properly, treat them as arrays with unspecified
8010 FIXME: jimb/2003-09-22: GDB does not really know
8011 how to handle arrays of unspecified length
8012 either; we just represent them as zero-length
8013 arrays. Choose an appropriate upper bound given
8014 the lower bound we've computed above. */
8018 high
= dwarf2_get_attr_constant_value (attr
, 1);
8022 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8025 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8026 high
= low
+ count
- 1;
8030 /* Dwarf-2 specifications explicitly allows to create subrange types
8031 without specifying a base type.
8032 In that case, the base type must be set to the type of
8033 the lower bound, upper bound or count, in that order, if any of these
8034 three attributes references an object that has a type.
8035 If no base type is found, the Dwarf-2 specifications say that
8036 a signed integer type of size equal to the size of an address should
8038 For the following C code: `extern char gdb_int [];'
8039 GCC produces an empty range DIE.
8040 FIXME: muller/2010-05-28: Possible references to object for low bound,
8041 high bound or count are not yet handled by this code.
8043 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8045 struct objfile
*objfile
= cu
->objfile
;
8046 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8047 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8048 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8050 /* Test "int", "long int", and "long long int" objfile types,
8051 and select the first one having a size above or equal to the
8052 architecture address size. */
8053 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8054 base_type
= int_type
;
8057 int_type
= objfile_type (objfile
)->builtin_long
;
8058 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8059 base_type
= int_type
;
8062 int_type
= objfile_type (objfile
)->builtin_long_long
;
8063 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8064 base_type
= int_type
;
8070 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8071 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8072 low
|= negative_mask
;
8073 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8074 high
|= negative_mask
;
8076 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8078 /* Mark arrays with dynamic length at least as an array of unspecified
8079 length. GDB could check the boundary but before it gets implemented at
8080 least allow accessing the array elements. */
8081 if (attr
&& attr
->form
== DW_FORM_block1
)
8082 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8084 name
= dwarf2_name (die
, cu
);
8086 TYPE_NAME (range_type
) = name
;
8088 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8090 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8092 set_die_type (die
, range_type
, cu
);
8094 /* set_die_type should be already done. */
8095 set_descriptive_type (range_type
, die
, cu
);
8100 static struct type
*
8101 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8105 /* For now, we only support the C meaning of an unspecified type: void. */
8107 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8108 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8110 return set_die_type (die
, type
, cu
);
8113 /* Trivial hash function for die_info: the hash value of a DIE
8114 is its offset in .debug_info for this objfile. */
8117 die_hash (const void *item
)
8119 const struct die_info
*die
= item
;
8124 /* Trivial comparison function for die_info structures: two DIEs
8125 are equal if they have the same offset. */
8128 die_eq (const void *item_lhs
, const void *item_rhs
)
8130 const struct die_info
*die_lhs
= item_lhs
;
8131 const struct die_info
*die_rhs
= item_rhs
;
8133 return die_lhs
->offset
== die_rhs
->offset
;
8136 /* Read a whole compilation unit into a linked list of dies. */
8138 static struct die_info
*
8139 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8141 struct die_reader_specs reader_specs
;
8142 int read_abbrevs
= 0;
8143 struct cleanup
*back_to
= NULL
;
8144 struct die_info
*die
;
8146 if (cu
->dwarf2_abbrevs
== NULL
)
8148 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8149 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8153 gdb_assert (cu
->die_hash
== NULL
);
8155 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8159 &cu
->comp_unit_obstack
,
8160 hashtab_obstack_allocate
,
8161 dummy_obstack_deallocate
);
8163 init_cu_die_reader (&reader_specs
, cu
);
8165 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8168 do_cleanups (back_to
);
8173 /* Main entry point for reading a DIE and all children.
8174 Read the DIE and dump it if requested. */
8176 static struct die_info
*
8177 read_die_and_children (const struct die_reader_specs
*reader
,
8179 gdb_byte
**new_info_ptr
,
8180 struct die_info
*parent
)
8182 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8183 new_info_ptr
, parent
);
8185 if (dwarf2_die_debug
)
8187 fprintf_unfiltered (gdb_stdlog
,
8188 "\nRead die from %s of %s:\n",
8189 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8191 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8193 : "unknown section",
8194 reader
->abfd
->filename
);
8195 dump_die (result
, dwarf2_die_debug
);
8201 /* Read a single die and all its descendents. Set the die's sibling
8202 field to NULL; set other fields in the die correctly, and set all
8203 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8204 location of the info_ptr after reading all of those dies. PARENT
8205 is the parent of the die in question. */
8207 static struct die_info
*
8208 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8210 gdb_byte
**new_info_ptr
,
8211 struct die_info
*parent
)
8213 struct die_info
*die
;
8217 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8220 *new_info_ptr
= cur_ptr
;
8223 store_in_ref_table (die
, reader
->cu
);
8226 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8230 *new_info_ptr
= cur_ptr
;
8233 die
->sibling
= NULL
;
8234 die
->parent
= parent
;
8238 /* Read a die, all of its descendents, and all of its siblings; set
8239 all of the fields of all of the dies correctly. Arguments are as
8240 in read_die_and_children. */
8242 static struct die_info
*
8243 read_die_and_siblings (const struct die_reader_specs
*reader
,
8245 gdb_byte
**new_info_ptr
,
8246 struct die_info
*parent
)
8248 struct die_info
*first_die
, *last_sibling
;
8252 first_die
= last_sibling
= NULL
;
8256 struct die_info
*die
8257 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8261 *new_info_ptr
= cur_ptr
;
8268 last_sibling
->sibling
= die
;
8274 /* Read the die from the .debug_info section buffer. Set DIEP to
8275 point to a newly allocated die with its information, except for its
8276 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8277 whether the die has children or not. */
8280 read_full_die (const struct die_reader_specs
*reader
,
8281 struct die_info
**diep
, gdb_byte
*info_ptr
,
8284 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8285 struct abbrev_info
*abbrev
;
8286 struct die_info
*die
;
8287 struct dwarf2_cu
*cu
= reader
->cu
;
8288 bfd
*abfd
= reader
->abfd
;
8290 offset
= info_ptr
- reader
->buffer
;
8291 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8292 info_ptr
+= bytes_read
;
8300 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8302 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8304 bfd_get_filename (abfd
));
8306 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8307 die
->offset
= offset
;
8308 die
->tag
= abbrev
->tag
;
8309 die
->abbrev
= abbrev_number
;
8311 die
->num_attrs
= abbrev
->num_attrs
;
8313 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8314 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8315 abfd
, info_ptr
, cu
);
8318 *has_children
= abbrev
->has_children
;
8322 /* In DWARF version 2, the description of the debugging information is
8323 stored in a separate .debug_abbrev section. Before we read any
8324 dies from a section we read in all abbreviations and install them
8325 in a hash table. This function also sets flags in CU describing
8326 the data found in the abbrev table. */
8329 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8331 struct comp_unit_head
*cu_header
= &cu
->header
;
8332 gdb_byte
*abbrev_ptr
;
8333 struct abbrev_info
*cur_abbrev
;
8334 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8335 unsigned int abbrev_form
, hash_number
;
8336 struct attr_abbrev
*cur_attrs
;
8337 unsigned int allocated_attrs
;
8339 /* Initialize dwarf2 abbrevs */
8340 obstack_init (&cu
->abbrev_obstack
);
8341 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8343 * sizeof (struct abbrev_info
*)));
8344 memset (cu
->dwarf2_abbrevs
, 0,
8345 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8347 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8348 &dwarf2_per_objfile
->abbrev
);
8349 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8350 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8351 abbrev_ptr
+= bytes_read
;
8353 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8354 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8356 /* loop until we reach an abbrev number of 0 */
8357 while (abbrev_number
)
8359 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8361 /* read in abbrev header */
8362 cur_abbrev
->number
= abbrev_number
;
8363 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8364 abbrev_ptr
+= bytes_read
;
8365 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8368 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8369 cu
->has_namespace_info
= 1;
8371 /* now read in declarations */
8372 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8373 abbrev_ptr
+= bytes_read
;
8374 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8375 abbrev_ptr
+= bytes_read
;
8378 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8380 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8382 = xrealloc (cur_attrs
, (allocated_attrs
8383 * sizeof (struct attr_abbrev
)));
8386 /* Record whether this compilation unit might have
8387 inter-compilation-unit references. If we don't know what form
8388 this attribute will have, then it might potentially be a
8389 DW_FORM_ref_addr, so we conservatively expect inter-CU
8392 if (abbrev_form
== DW_FORM_ref_addr
8393 || abbrev_form
== DW_FORM_indirect
)
8394 cu
->has_form_ref_addr
= 1;
8396 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8397 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8398 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8399 abbrev_ptr
+= bytes_read
;
8400 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8401 abbrev_ptr
+= bytes_read
;
8404 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8405 (cur_abbrev
->num_attrs
8406 * sizeof (struct attr_abbrev
)));
8407 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8408 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8410 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8411 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8412 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8414 /* Get next abbreviation.
8415 Under Irix6 the abbreviations for a compilation unit are not
8416 always properly terminated with an abbrev number of 0.
8417 Exit loop if we encounter an abbreviation which we have
8418 already read (which means we are about to read the abbreviations
8419 for the next compile unit) or if the end of the abbreviation
8420 table is reached. */
8421 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8422 >= dwarf2_per_objfile
->abbrev
.size
)
8424 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8425 abbrev_ptr
+= bytes_read
;
8426 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8433 /* Release the memory used by the abbrev table for a compilation unit. */
8436 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8438 struct dwarf2_cu
*cu
= ptr_to_cu
;
8440 obstack_free (&cu
->abbrev_obstack
, NULL
);
8441 cu
->dwarf2_abbrevs
= NULL
;
8444 /* Lookup an abbrev_info structure in the abbrev hash table. */
8446 static struct abbrev_info
*
8447 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8449 unsigned int hash_number
;
8450 struct abbrev_info
*abbrev
;
8452 hash_number
= number
% ABBREV_HASH_SIZE
;
8453 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8457 if (abbrev
->number
== number
)
8460 abbrev
= abbrev
->next
;
8465 /* Returns nonzero if TAG represents a type that we might generate a partial
8469 is_type_tag_for_partial (int tag
)
8474 /* Some types that would be reasonable to generate partial symbols for,
8475 that we don't at present. */
8476 case DW_TAG_array_type
:
8477 case DW_TAG_file_type
:
8478 case DW_TAG_ptr_to_member_type
:
8479 case DW_TAG_set_type
:
8480 case DW_TAG_string_type
:
8481 case DW_TAG_subroutine_type
:
8483 case DW_TAG_base_type
:
8484 case DW_TAG_class_type
:
8485 case DW_TAG_interface_type
:
8486 case DW_TAG_enumeration_type
:
8487 case DW_TAG_structure_type
:
8488 case DW_TAG_subrange_type
:
8489 case DW_TAG_typedef
:
8490 case DW_TAG_union_type
:
8497 /* Load all DIEs that are interesting for partial symbols into memory. */
8499 static struct partial_die_info
*
8500 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8501 int building_psymtab
, struct dwarf2_cu
*cu
)
8503 struct partial_die_info
*part_die
;
8504 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8505 struct abbrev_info
*abbrev
;
8506 unsigned int bytes_read
;
8507 unsigned int load_all
= 0;
8509 int nesting_level
= 1;
8514 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8518 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8522 &cu
->comp_unit_obstack
,
8523 hashtab_obstack_allocate
,
8524 dummy_obstack_deallocate
);
8526 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8527 sizeof (struct partial_die_info
));
8531 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8533 /* A NULL abbrev means the end of a series of children. */
8536 if (--nesting_level
== 0)
8538 /* PART_DIE was probably the last thing allocated on the
8539 comp_unit_obstack, so we could call obstack_free
8540 here. We don't do that because the waste is small,
8541 and will be cleaned up when we're done with this
8542 compilation unit. This way, we're also more robust
8543 against other users of the comp_unit_obstack. */
8546 info_ptr
+= bytes_read
;
8547 last_die
= parent_die
;
8548 parent_die
= parent_die
->die_parent
;
8552 /* Check for template arguments. We never save these; if
8553 they're seen, we just mark the parent, and go on our way. */
8554 if (parent_die
!= NULL
8555 && cu
->language
== language_cplus
8556 && (abbrev
->tag
== DW_TAG_template_type_param
8557 || abbrev
->tag
== DW_TAG_template_value_param
))
8559 parent_die
->has_template_arguments
= 1;
8563 /* We don't need a partial DIE for the template argument. */
8564 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8570 /* We only recurse into subprograms looking for template arguments.
8571 Skip their other children. */
8573 && cu
->language
== language_cplus
8574 && parent_die
!= NULL
8575 && parent_die
->tag
== DW_TAG_subprogram
)
8577 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8581 /* Check whether this DIE is interesting enough to save. Normally
8582 we would not be interested in members here, but there may be
8583 later variables referencing them via DW_AT_specification (for
8586 && !is_type_tag_for_partial (abbrev
->tag
)
8587 && abbrev
->tag
!= DW_TAG_enumerator
8588 && abbrev
->tag
!= DW_TAG_subprogram
8589 && abbrev
->tag
!= DW_TAG_lexical_block
8590 && abbrev
->tag
!= DW_TAG_variable
8591 && abbrev
->tag
!= DW_TAG_namespace
8592 && abbrev
->tag
!= DW_TAG_module
8593 && abbrev
->tag
!= DW_TAG_member
)
8595 /* Otherwise we skip to the next sibling, if any. */
8596 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8600 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8601 buffer
, info_ptr
, cu
);
8603 /* This two-pass algorithm for processing partial symbols has a
8604 high cost in cache pressure. Thus, handle some simple cases
8605 here which cover the majority of C partial symbols. DIEs
8606 which neither have specification tags in them, nor could have
8607 specification tags elsewhere pointing at them, can simply be
8608 processed and discarded.
8610 This segment is also optional; scan_partial_symbols and
8611 add_partial_symbol will handle these DIEs if we chain
8612 them in normally. When compilers which do not emit large
8613 quantities of duplicate debug information are more common,
8614 this code can probably be removed. */
8616 /* Any complete simple types at the top level (pretty much all
8617 of them, for a language without namespaces), can be processed
8619 if (parent_die
== NULL
8620 && part_die
->has_specification
== 0
8621 && part_die
->is_declaration
== 0
8622 && (part_die
->tag
== DW_TAG_typedef
8623 || part_die
->tag
== DW_TAG_base_type
8624 || part_die
->tag
== DW_TAG_subrange_type
))
8626 if (building_psymtab
&& part_die
->name
!= NULL
)
8627 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8628 VAR_DOMAIN
, LOC_TYPEDEF
,
8629 &cu
->objfile
->static_psymbols
,
8630 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8631 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8635 /* If we're at the second level, and we're an enumerator, and
8636 our parent has no specification (meaning possibly lives in a
8637 namespace elsewhere), then we can add the partial symbol now
8638 instead of queueing it. */
8639 if (part_die
->tag
== DW_TAG_enumerator
8640 && parent_die
!= NULL
8641 && parent_die
->die_parent
== NULL
8642 && parent_die
->tag
== DW_TAG_enumeration_type
8643 && parent_die
->has_specification
== 0)
8645 if (part_die
->name
== NULL
)
8646 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8647 else if (building_psymtab
)
8648 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8649 VAR_DOMAIN
, LOC_CONST
,
8650 (cu
->language
== language_cplus
8651 || cu
->language
== language_java
)
8652 ? &cu
->objfile
->global_psymbols
8653 : &cu
->objfile
->static_psymbols
,
8654 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8656 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8660 /* We'll save this DIE so link it in. */
8661 part_die
->die_parent
= parent_die
;
8662 part_die
->die_sibling
= NULL
;
8663 part_die
->die_child
= NULL
;
8665 if (last_die
&& last_die
== parent_die
)
8666 last_die
->die_child
= part_die
;
8668 last_die
->die_sibling
= part_die
;
8670 last_die
= part_die
;
8672 if (first_die
== NULL
)
8673 first_die
= part_die
;
8675 /* Maybe add the DIE to the hash table. Not all DIEs that we
8676 find interesting need to be in the hash table, because we
8677 also have the parent/sibling/child chains; only those that we
8678 might refer to by offset later during partial symbol reading.
8680 For now this means things that might have be the target of a
8681 DW_AT_specification, DW_AT_abstract_origin, or
8682 DW_AT_extension. DW_AT_extension will refer only to
8683 namespaces; DW_AT_abstract_origin refers to functions (and
8684 many things under the function DIE, but we do not recurse
8685 into function DIEs during partial symbol reading) and
8686 possibly variables as well; DW_AT_specification refers to
8687 declarations. Declarations ought to have the DW_AT_declaration
8688 flag. It happens that GCC forgets to put it in sometimes, but
8689 only for functions, not for types.
8691 Adding more things than necessary to the hash table is harmless
8692 except for the performance cost. Adding too few will result in
8693 wasted time in find_partial_die, when we reread the compilation
8694 unit with load_all_dies set. */
8697 || abbrev
->tag
== DW_TAG_subprogram
8698 || abbrev
->tag
== DW_TAG_variable
8699 || abbrev
->tag
== DW_TAG_namespace
8700 || part_die
->is_declaration
)
8704 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8705 part_die
->offset
, INSERT
);
8709 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8710 sizeof (struct partial_die_info
));
8712 /* For some DIEs we want to follow their children (if any). For C
8713 we have no reason to follow the children of structures; for other
8714 languages we have to, so that we can get at method physnames
8715 to infer fully qualified class names, for DW_AT_specification,
8716 and for C++ template arguments. For C++, we also look one level
8717 inside functions to find template arguments (if the name of the
8718 function does not already contain the template arguments).
8720 For Ada, we need to scan the children of subprograms and lexical
8721 blocks as well because Ada allows the definition of nested
8722 entities that could be interesting for the debugger, such as
8723 nested subprograms for instance. */
8724 if (last_die
->has_children
8726 || last_die
->tag
== DW_TAG_namespace
8727 || last_die
->tag
== DW_TAG_module
8728 || last_die
->tag
== DW_TAG_enumeration_type
8729 || (cu
->language
== language_cplus
8730 && last_die
->tag
== DW_TAG_subprogram
8731 && (last_die
->name
== NULL
8732 || strchr (last_die
->name
, '<') == NULL
))
8733 || (cu
->language
!= language_c
8734 && (last_die
->tag
== DW_TAG_class_type
8735 || last_die
->tag
== DW_TAG_interface_type
8736 || last_die
->tag
== DW_TAG_structure_type
8737 || last_die
->tag
== DW_TAG_union_type
))
8738 || (cu
->language
== language_ada
8739 && (last_die
->tag
== DW_TAG_subprogram
8740 || last_die
->tag
== DW_TAG_lexical_block
))))
8743 parent_die
= last_die
;
8747 /* Otherwise we skip to the next sibling, if any. */
8748 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8750 /* Back to the top, do it again. */
8754 /* Read a minimal amount of information into the minimal die structure. */
8757 read_partial_die (struct partial_die_info
*part_die
,
8758 struct abbrev_info
*abbrev
,
8759 unsigned int abbrev_len
, bfd
*abfd
,
8760 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8761 struct dwarf2_cu
*cu
)
8764 struct attribute attr
;
8765 int has_low_pc_attr
= 0;
8766 int has_high_pc_attr
= 0;
8768 memset (part_die
, 0, sizeof (struct partial_die_info
));
8770 part_die
->offset
= info_ptr
- buffer
;
8772 info_ptr
+= abbrev_len
;
8777 part_die
->tag
= abbrev
->tag
;
8778 part_die
->has_children
= abbrev
->has_children
;
8780 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8782 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8784 /* Store the data if it is of an attribute we want to keep in a
8785 partial symbol table. */
8789 switch (part_die
->tag
)
8791 case DW_TAG_compile_unit
:
8792 case DW_TAG_type_unit
:
8793 /* Compilation units have a DW_AT_name that is a filename, not
8794 a source language identifier. */
8795 case DW_TAG_enumeration_type
:
8796 case DW_TAG_enumerator
:
8797 /* These tags always have simple identifiers already; no need
8798 to canonicalize them. */
8799 part_die
->name
= DW_STRING (&attr
);
8803 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8804 &cu
->objfile
->objfile_obstack
);
8808 case DW_AT_linkage_name
:
8809 case DW_AT_MIPS_linkage_name
:
8810 /* Note that both forms of linkage name might appear. We
8811 assume they will be the same, and we only store the last
8813 if (cu
->language
== language_ada
)
8814 part_die
->name
= DW_STRING (&attr
);
8817 has_low_pc_attr
= 1;
8818 part_die
->lowpc
= DW_ADDR (&attr
);
8821 has_high_pc_attr
= 1;
8822 part_die
->highpc
= DW_ADDR (&attr
);
8824 case DW_AT_location
:
8825 /* Support the .debug_loc offsets */
8826 if (attr_form_is_block (&attr
))
8828 part_die
->locdesc
= DW_BLOCK (&attr
);
8830 else if (attr_form_is_section_offset (&attr
))
8832 dwarf2_complex_location_expr_complaint ();
8836 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8837 "partial symbol information");
8840 case DW_AT_external
:
8841 part_die
->is_external
= DW_UNSND (&attr
);
8843 case DW_AT_declaration
:
8844 part_die
->is_declaration
= DW_UNSND (&attr
);
8847 part_die
->has_type
= 1;
8849 case DW_AT_abstract_origin
:
8850 case DW_AT_specification
:
8851 case DW_AT_extension
:
8852 part_die
->has_specification
= 1;
8853 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
8856 /* Ignore absolute siblings, they might point outside of
8857 the current compile unit. */
8858 if (attr
.form
== DW_FORM_ref_addr
)
8859 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
8861 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
8863 case DW_AT_byte_size
:
8864 part_die
->has_byte_size
= 1;
8866 case DW_AT_calling_convention
:
8867 /* DWARF doesn't provide a way to identify a program's source-level
8868 entry point. DW_AT_calling_convention attributes are only meant
8869 to describe functions' calling conventions.
8871 However, because it's a necessary piece of information in
8872 Fortran, and because DW_CC_program is the only piece of debugging
8873 information whose definition refers to a 'main program' at all,
8874 several compilers have begun marking Fortran main programs with
8875 DW_CC_program --- even when those functions use the standard
8876 calling conventions.
8878 So until DWARF specifies a way to provide this information and
8879 compilers pick up the new representation, we'll support this
8881 if (DW_UNSND (&attr
) == DW_CC_program
8882 && cu
->language
== language_fortran
)
8883 set_main_name (part_die
->name
);
8890 /* When using the GNU linker, .gnu.linkonce. sections are used to
8891 eliminate duplicate copies of functions and vtables and such.
8892 The linker will arbitrarily choose one and discard the others.
8893 The AT_*_pc values for such functions refer to local labels in
8894 these sections. If the section from that file was discarded, the
8895 labels are not in the output, so the relocs get a value of 0.
8896 If this is a discarded function, mark the pc bounds as invalid,
8897 so that GDB will ignore it. */
8898 if (has_low_pc_attr
&& has_high_pc_attr
8899 && part_die
->lowpc
< part_die
->highpc
8900 && (part_die
->lowpc
!= 0
8901 || dwarf2_per_objfile
->has_section_at_zero
))
8902 part_die
->has_pc_info
= 1;
8907 /* Find a cached partial DIE at OFFSET in CU. */
8909 static struct partial_die_info
*
8910 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
8912 struct partial_die_info
*lookup_die
= NULL
;
8913 struct partial_die_info part_die
;
8915 part_die
.offset
= offset
;
8916 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
8921 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8922 except in the case of .debug_types DIEs which do not reference
8923 outside their CU (they do however referencing other types via
8926 static struct partial_die_info
*
8927 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
8929 struct dwarf2_per_cu_data
*per_cu
= NULL
;
8930 struct partial_die_info
*pd
= NULL
;
8932 if (cu
->per_cu
->from_debug_types
)
8934 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8940 if (offset_in_cu_p (&cu
->header
, offset
))
8942 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8947 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
8949 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
8950 load_partial_comp_unit (per_cu
, cu
->objfile
);
8952 per_cu
->cu
->last_used
= 0;
8953 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8955 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
8957 struct cleanup
*back_to
;
8958 struct partial_die_info comp_unit_die
;
8959 struct abbrev_info
*abbrev
;
8960 unsigned int bytes_read
;
8963 per_cu
->load_all_dies
= 1;
8965 /* Re-read the DIEs. */
8966 back_to
= make_cleanup (null_cleanup
, 0);
8967 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
8969 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
8970 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
8972 info_ptr
= (dwarf2_per_objfile
->info
.buffer
8973 + per_cu
->cu
->header
.offset
8974 + per_cu
->cu
->header
.first_die_offset
);
8975 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
8976 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
8977 per_cu
->cu
->objfile
->obfd
,
8978 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8980 if (comp_unit_die
.has_children
)
8981 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
8982 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8984 do_cleanups (back_to
);
8986 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8992 internal_error (__FILE__
, __LINE__
,
8993 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8994 offset
, bfd_get_filename (cu
->objfile
->obfd
));
8998 /* Adjust PART_DIE before generating a symbol for it. This function
8999 may set the is_external flag or change the DIE's name. */
9002 fixup_partial_die (struct partial_die_info
*part_die
,
9003 struct dwarf2_cu
*cu
)
9005 /* If we found a reference attribute and the DIE has no name, try
9006 to find a name in the referred to DIE. */
9008 if (part_die
->name
== NULL
&& part_die
->has_specification
)
9010 struct partial_die_info
*spec_die
;
9012 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
9014 fixup_partial_die (spec_die
, cu
);
9018 part_die
->name
= spec_die
->name
;
9020 /* Copy DW_AT_external attribute if it is set. */
9021 if (spec_die
->is_external
)
9022 part_die
->is_external
= spec_die
->is_external
;
9026 /* Set default names for some unnamed DIEs. */
9027 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
9028 || part_die
->tag
== DW_TAG_class_type
))
9029 part_die
->name
= "(anonymous class)";
9031 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9032 part_die
->name
= "(anonymous namespace)";
9034 if (part_die
->tag
== DW_TAG_structure_type
9035 || part_die
->tag
== DW_TAG_class_type
9036 || part_die
->tag
== DW_TAG_union_type
)
9037 guess_structure_name (part_die
, cu
);
9040 /* Read an attribute value described by an attribute form. */
9043 read_attribute_value (struct attribute
*attr
, unsigned form
,
9044 bfd
*abfd
, gdb_byte
*info_ptr
,
9045 struct dwarf2_cu
*cu
)
9047 struct comp_unit_head
*cu_header
= &cu
->header
;
9048 unsigned int bytes_read
;
9049 struct dwarf_block
*blk
;
9054 case DW_FORM_ref_addr
:
9055 if (cu
->header
.version
== 2)
9056 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9058 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9059 info_ptr
+= bytes_read
;
9062 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9063 info_ptr
+= bytes_read
;
9065 case DW_FORM_block2
:
9066 blk
= dwarf_alloc_block (cu
);
9067 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9069 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9070 info_ptr
+= blk
->size
;
9071 DW_BLOCK (attr
) = blk
;
9073 case DW_FORM_block4
:
9074 blk
= dwarf_alloc_block (cu
);
9075 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9077 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9078 info_ptr
+= blk
->size
;
9079 DW_BLOCK (attr
) = blk
;
9082 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9086 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9090 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9093 case DW_FORM_sec_offset
:
9094 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9095 info_ptr
+= bytes_read
;
9097 case DW_FORM_string
:
9098 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9099 DW_STRING_IS_CANONICAL (attr
) = 0;
9100 info_ptr
+= bytes_read
;
9103 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9105 DW_STRING_IS_CANONICAL (attr
) = 0;
9106 info_ptr
+= bytes_read
;
9108 case DW_FORM_exprloc
:
9110 blk
= dwarf_alloc_block (cu
);
9111 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9112 info_ptr
+= bytes_read
;
9113 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9114 info_ptr
+= blk
->size
;
9115 DW_BLOCK (attr
) = blk
;
9117 case DW_FORM_block1
:
9118 blk
= dwarf_alloc_block (cu
);
9119 blk
->size
= read_1_byte (abfd
, info_ptr
);
9121 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9122 info_ptr
+= blk
->size
;
9123 DW_BLOCK (attr
) = blk
;
9126 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9130 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9133 case DW_FORM_flag_present
:
9134 DW_UNSND (attr
) = 1;
9137 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9138 info_ptr
+= bytes_read
;
9141 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9142 info_ptr
+= bytes_read
;
9145 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9149 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9153 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9157 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9161 /* Convert the signature to something we can record in DW_UNSND
9163 NOTE: This is NULL if the type wasn't found. */
9164 DW_SIGNATURED_TYPE (attr
) =
9165 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9168 case DW_FORM_ref_udata
:
9169 DW_ADDR (attr
) = (cu
->header
.offset
9170 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9171 info_ptr
+= bytes_read
;
9173 case DW_FORM_indirect
:
9174 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9175 info_ptr
+= bytes_read
;
9176 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9179 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9180 dwarf_form_name (form
),
9181 bfd_get_filename (abfd
));
9184 /* We have seen instances where the compiler tried to emit a byte
9185 size attribute of -1 which ended up being encoded as an unsigned
9186 0xffffffff. Although 0xffffffff is technically a valid size value,
9187 an object of this size seems pretty unlikely so we can relatively
9188 safely treat these cases as if the size attribute was invalid and
9189 treat them as zero by default. */
9190 if (attr
->name
== DW_AT_byte_size
9191 && form
== DW_FORM_data4
9192 && DW_UNSND (attr
) >= 0xffffffff)
9195 (&symfile_complaints
,
9196 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9197 hex_string (DW_UNSND (attr
)));
9198 DW_UNSND (attr
) = 0;
9204 /* Read an attribute described by an abbreviated attribute. */
9207 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9208 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9210 attr
->name
= abbrev
->name
;
9211 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9214 /* read dwarf information from a buffer */
9217 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9219 return bfd_get_8 (abfd
, buf
);
9223 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9225 return bfd_get_signed_8 (abfd
, buf
);
9229 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9231 return bfd_get_16 (abfd
, buf
);
9235 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9237 return bfd_get_signed_16 (abfd
, buf
);
9241 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9243 return bfd_get_32 (abfd
, buf
);
9247 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9249 return bfd_get_signed_32 (abfd
, buf
);
9253 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9255 return bfd_get_64 (abfd
, buf
);
9259 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9260 unsigned int *bytes_read
)
9262 struct comp_unit_head
*cu_header
= &cu
->header
;
9263 CORE_ADDR retval
= 0;
9265 if (cu_header
->signed_addr_p
)
9267 switch (cu_header
->addr_size
)
9270 retval
= bfd_get_signed_16 (abfd
, buf
);
9273 retval
= bfd_get_signed_32 (abfd
, buf
);
9276 retval
= bfd_get_signed_64 (abfd
, buf
);
9279 internal_error (__FILE__
, __LINE__
,
9280 _("read_address: bad switch, signed [in module %s]"),
9281 bfd_get_filename (abfd
));
9286 switch (cu_header
->addr_size
)
9289 retval
= bfd_get_16 (abfd
, buf
);
9292 retval
= bfd_get_32 (abfd
, buf
);
9295 retval
= bfd_get_64 (abfd
, buf
);
9298 internal_error (__FILE__
, __LINE__
,
9299 _("read_address: bad switch, unsigned [in module %s]"),
9300 bfd_get_filename (abfd
));
9304 *bytes_read
= cu_header
->addr_size
;
9308 /* Read the initial length from a section. The (draft) DWARF 3
9309 specification allows the initial length to take up either 4 bytes
9310 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9311 bytes describe the length and all offsets will be 8 bytes in length
9314 An older, non-standard 64-bit format is also handled by this
9315 function. The older format in question stores the initial length
9316 as an 8-byte quantity without an escape value. Lengths greater
9317 than 2^32 aren't very common which means that the initial 4 bytes
9318 is almost always zero. Since a length value of zero doesn't make
9319 sense for the 32-bit format, this initial zero can be considered to
9320 be an escape value which indicates the presence of the older 64-bit
9321 format. As written, the code can't detect (old format) lengths
9322 greater than 4GB. If it becomes necessary to handle lengths
9323 somewhat larger than 4GB, we could allow other small values (such
9324 as the non-sensical values of 1, 2, and 3) to also be used as
9325 escape values indicating the presence of the old format.
9327 The value returned via bytes_read should be used to increment the
9328 relevant pointer after calling read_initial_length().
9330 [ Note: read_initial_length() and read_offset() are based on the
9331 document entitled "DWARF Debugging Information Format", revision
9332 3, draft 8, dated November 19, 2001. This document was obtained
9335 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9337 This document is only a draft and is subject to change. (So beware.)
9339 Details regarding the older, non-standard 64-bit format were
9340 determined empirically by examining 64-bit ELF files produced by
9341 the SGI toolchain on an IRIX 6.5 machine.
9343 - Kevin, July 16, 2002
9347 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9349 LONGEST length
= bfd_get_32 (abfd
, buf
);
9351 if (length
== 0xffffffff)
9353 length
= bfd_get_64 (abfd
, buf
+ 4);
9356 else if (length
== 0)
9358 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9359 length
= bfd_get_64 (abfd
, buf
);
9370 /* Cover function for read_initial_length.
9371 Returns the length of the object at BUF, and stores the size of the
9372 initial length in *BYTES_READ and stores the size that offsets will be in
9374 If the initial length size is not equivalent to that specified in
9375 CU_HEADER then issue a complaint.
9376 This is useful when reading non-comp-unit headers. */
9379 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9380 const struct comp_unit_head
*cu_header
,
9381 unsigned int *bytes_read
,
9382 unsigned int *offset_size
)
9384 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9386 gdb_assert (cu_header
->initial_length_size
== 4
9387 || cu_header
->initial_length_size
== 8
9388 || cu_header
->initial_length_size
== 12);
9390 if (cu_header
->initial_length_size
!= *bytes_read
)
9391 complaint (&symfile_complaints
,
9392 _("intermixed 32-bit and 64-bit DWARF sections"));
9394 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9398 /* Read an offset from the data stream. The size of the offset is
9399 given by cu_header->offset_size. */
9402 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9403 unsigned int *bytes_read
)
9405 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9407 *bytes_read
= cu_header
->offset_size
;
9411 /* Read an offset from the data stream. */
9414 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9418 switch (offset_size
)
9421 retval
= bfd_get_32 (abfd
, buf
);
9424 retval
= bfd_get_64 (abfd
, buf
);
9427 internal_error (__FILE__
, __LINE__
,
9428 _("read_offset_1: bad switch [in module %s]"),
9429 bfd_get_filename (abfd
));
9436 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9438 /* If the size of a host char is 8 bits, we can return a pointer
9439 to the buffer, otherwise we have to copy the data to a buffer
9440 allocated on the temporary obstack. */
9441 gdb_assert (HOST_CHAR_BIT
== 8);
9446 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9448 /* If the size of a host char is 8 bits, we can return a pointer
9449 to the string, otherwise we have to copy the string to a buffer
9450 allocated on the temporary obstack. */
9451 gdb_assert (HOST_CHAR_BIT
== 8);
9454 *bytes_read_ptr
= 1;
9457 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9458 return (char *) buf
;
9462 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9463 const struct comp_unit_head
*cu_header
,
9464 unsigned int *bytes_read_ptr
)
9466 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9468 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9469 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9471 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9472 bfd_get_filename (abfd
));
9475 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9477 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9478 bfd_get_filename (abfd
));
9481 gdb_assert (HOST_CHAR_BIT
== 8);
9482 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9484 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9487 static unsigned long
9488 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9490 unsigned long result
;
9491 unsigned int num_read
;
9501 byte
= bfd_get_8 (abfd
, buf
);
9504 result
|= ((unsigned long)(byte
& 127) << shift
);
9505 if ((byte
& 128) == 0)
9511 *bytes_read_ptr
= num_read
;
9516 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9519 int i
, shift
, num_read
;
9528 byte
= bfd_get_8 (abfd
, buf
);
9531 result
|= ((long)(byte
& 127) << shift
);
9533 if ((byte
& 128) == 0)
9538 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9539 result
|= -(((long)1) << shift
);
9540 *bytes_read_ptr
= num_read
;
9544 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9547 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9553 byte
= bfd_get_8 (abfd
, buf
);
9555 if ((byte
& 128) == 0)
9561 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9568 cu
->language
= language_c
;
9570 case DW_LANG_C_plus_plus
:
9571 cu
->language
= language_cplus
;
9574 cu
->language
= language_d
;
9576 case DW_LANG_Fortran77
:
9577 case DW_LANG_Fortran90
:
9578 case DW_LANG_Fortran95
:
9579 cu
->language
= language_fortran
;
9581 case DW_LANG_Mips_Assembler
:
9582 cu
->language
= language_asm
;
9585 cu
->language
= language_java
;
9589 cu
->language
= language_ada
;
9591 case DW_LANG_Modula2
:
9592 cu
->language
= language_m2
;
9594 case DW_LANG_Pascal83
:
9595 cu
->language
= language_pascal
;
9598 cu
->language
= language_objc
;
9600 case DW_LANG_Cobol74
:
9601 case DW_LANG_Cobol85
:
9603 cu
->language
= language_minimal
;
9606 cu
->language_defn
= language_def (cu
->language
);
9609 /* Return the named attribute or NULL if not there. */
9611 static struct attribute
*
9612 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9615 struct attribute
*spec
= NULL
;
9617 for (i
= 0; i
< die
->num_attrs
; ++i
)
9619 if (die
->attrs
[i
].name
== name
)
9620 return &die
->attrs
[i
];
9621 if (die
->attrs
[i
].name
== DW_AT_specification
9622 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9623 spec
= &die
->attrs
[i
];
9628 die
= follow_die_ref (die
, spec
, &cu
);
9629 return dwarf2_attr (die
, name
, cu
);
9635 /* Return the named attribute or NULL if not there,
9636 but do not follow DW_AT_specification, etc.
9637 This is for use in contexts where we're reading .debug_types dies.
9638 Following DW_AT_specification, DW_AT_abstract_origin will take us
9639 back up the chain, and we want to go down. */
9641 static struct attribute
*
9642 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9643 struct dwarf2_cu
*cu
)
9647 for (i
= 0; i
< die
->num_attrs
; ++i
)
9648 if (die
->attrs
[i
].name
== name
)
9649 return &die
->attrs
[i
];
9654 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9655 and holds a non-zero value. This function should only be used for
9656 DW_FORM_flag or DW_FORM_flag_present attributes. */
9659 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9661 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9663 return (attr
&& DW_UNSND (attr
));
9667 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9669 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9670 which value is non-zero. However, we have to be careful with
9671 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9672 (via dwarf2_flag_true_p) follows this attribute. So we may
9673 end up accidently finding a declaration attribute that belongs
9674 to a different DIE referenced by the specification attribute,
9675 even though the given DIE does not have a declaration attribute. */
9676 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9677 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9680 /* Return the die giving the specification for DIE, if there is
9681 one. *SPEC_CU is the CU containing DIE on input, and the CU
9682 containing the return value on output. If there is no
9683 specification, but there is an abstract origin, that is
9686 static struct die_info
*
9687 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9689 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9692 if (spec_attr
== NULL
)
9693 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9695 if (spec_attr
== NULL
)
9698 return follow_die_ref (die
, spec_attr
, spec_cu
);
9701 /* Free the line_header structure *LH, and any arrays and strings it
9704 free_line_header (struct line_header
*lh
)
9706 if (lh
->standard_opcode_lengths
)
9707 xfree (lh
->standard_opcode_lengths
);
9709 /* Remember that all the lh->file_names[i].name pointers are
9710 pointers into debug_line_buffer, and don't need to be freed. */
9712 xfree (lh
->file_names
);
9714 /* Similarly for the include directory names. */
9715 if (lh
->include_dirs
)
9716 xfree (lh
->include_dirs
);
9722 /* Add an entry to LH's include directory table. */
9724 add_include_dir (struct line_header
*lh
, char *include_dir
)
9726 /* Grow the array if necessary. */
9727 if (lh
->include_dirs_size
== 0)
9729 lh
->include_dirs_size
= 1; /* for testing */
9730 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9731 * sizeof (*lh
->include_dirs
));
9733 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9735 lh
->include_dirs_size
*= 2;
9736 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9737 (lh
->include_dirs_size
9738 * sizeof (*lh
->include_dirs
)));
9741 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
9745 /* Add an entry to LH's file name table. */
9747 add_file_name (struct line_header
*lh
,
9749 unsigned int dir_index
,
9750 unsigned int mod_time
,
9751 unsigned int length
)
9753 struct file_entry
*fe
;
9755 /* Grow the array if necessary. */
9756 if (lh
->file_names_size
== 0)
9758 lh
->file_names_size
= 1; /* for testing */
9759 lh
->file_names
= xmalloc (lh
->file_names_size
9760 * sizeof (*lh
->file_names
));
9762 else if (lh
->num_file_names
>= lh
->file_names_size
)
9764 lh
->file_names_size
*= 2;
9765 lh
->file_names
= xrealloc (lh
->file_names
,
9766 (lh
->file_names_size
9767 * sizeof (*lh
->file_names
)));
9770 fe
= &lh
->file_names
[lh
->num_file_names
++];
9772 fe
->dir_index
= dir_index
;
9773 fe
->mod_time
= mod_time
;
9774 fe
->length
= length
;
9780 /* Read the statement program header starting at OFFSET in
9781 .debug_line, according to the endianness of ABFD. Return a pointer
9782 to a struct line_header, allocated using xmalloc.
9784 NOTE: the strings in the include directory and file name tables of
9785 the returned object point into debug_line_buffer, and must not be
9787 static struct line_header
*
9788 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
9789 struct dwarf2_cu
*cu
)
9791 struct cleanup
*back_to
;
9792 struct line_header
*lh
;
9794 unsigned int bytes_read
, offset_size
;
9796 char *cur_dir
, *cur_file
;
9798 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
9799 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
9801 complaint (&symfile_complaints
, _("missing .debug_line section"));
9805 /* Make sure that at least there's room for the total_length field.
9806 That could be 12 bytes long, but we're just going to fudge that. */
9807 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
9809 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9813 lh
= xmalloc (sizeof (*lh
));
9814 memset (lh
, 0, sizeof (*lh
));
9815 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
9818 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
9820 /* Read in the header. */
9822 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
9823 &bytes_read
, &offset_size
);
9824 line_ptr
+= bytes_read
;
9825 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
9826 + dwarf2_per_objfile
->line
.size
))
9828 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9831 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
9832 lh
->version
= read_2_bytes (abfd
, line_ptr
);
9834 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
9835 line_ptr
+= offset_size
;
9836 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
9838 if (lh
->version
>= 4)
9840 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
9844 lh
->maximum_ops_per_instruction
= 1;
9846 if (lh
->maximum_ops_per_instruction
== 0)
9848 lh
->maximum_ops_per_instruction
= 1;
9849 complaint (&symfile_complaints
,
9850 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9853 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
9855 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
9857 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
9859 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
9861 lh
->standard_opcode_lengths
9862 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
9864 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
9865 for (i
= 1; i
< lh
->opcode_base
; ++i
)
9867 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
9871 /* Read directory table. */
9872 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9874 line_ptr
+= bytes_read
;
9875 add_include_dir (lh
, cur_dir
);
9877 line_ptr
+= bytes_read
;
9879 /* Read file name table. */
9880 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9882 unsigned int dir_index
, mod_time
, length
;
9884 line_ptr
+= bytes_read
;
9885 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9886 line_ptr
+= bytes_read
;
9887 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9888 line_ptr
+= bytes_read
;
9889 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9890 line_ptr
+= bytes_read
;
9892 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
9894 line_ptr
+= bytes_read
;
9895 lh
->statement_program_start
= line_ptr
;
9897 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
9898 + dwarf2_per_objfile
->line
.size
))
9899 complaint (&symfile_complaints
,
9900 _("line number info header doesn't fit in `.debug_line' section"));
9902 discard_cleanups (back_to
);
9906 /* This function exists to work around a bug in certain compilers
9907 (particularly GCC 2.95), in which the first line number marker of a
9908 function does not show up until after the prologue, right before
9909 the second line number marker. This function shifts ADDRESS down
9910 to the beginning of the function if necessary, and is called on
9911 addresses passed to record_line. */
9914 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
9916 struct function_range
*fn
;
9918 /* Find the function_range containing address. */
9923 cu
->cached_fn
= cu
->first_fn
;
9927 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9933 while (fn
&& fn
!= cu
->cached_fn
)
9934 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9944 if (address
!= fn
->lowpc
)
9945 complaint (&symfile_complaints
,
9946 _("misplaced first line number at 0x%lx for '%s'"),
9947 (unsigned long) address
, fn
->name
);
9952 /* Subroutine of dwarf_decode_lines to simplify it.
9953 Return the file name of the psymtab for included file FILE_INDEX
9954 in line header LH of PST.
9955 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9956 If space for the result is malloc'd, it will be freed by a cleanup.
9957 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9960 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
9961 const struct partial_symtab
*pst
,
9962 const char *comp_dir
)
9964 const struct file_entry fe
= lh
->file_names
[file_index
];
9965 char *include_name
= fe
.name
;
9966 char *include_name_to_compare
= include_name
;
9967 char *dir_name
= NULL
;
9972 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
9974 if (!IS_ABSOLUTE_PATH (include_name
)
9975 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
9977 /* Avoid creating a duplicate psymtab for PST.
9978 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9979 Before we do the comparison, however, we need to account
9980 for DIR_NAME and COMP_DIR.
9981 First prepend dir_name (if non-NULL). If we still don't
9982 have an absolute path prepend comp_dir (if non-NULL).
9983 However, the directory we record in the include-file's
9984 psymtab does not contain COMP_DIR (to match the
9985 corresponding symtab(s)).
9990 bash$ gcc -g ./hello.c
9991 include_name = "hello.c"
9993 DW_AT_comp_dir = comp_dir = "/tmp"
9994 DW_AT_name = "./hello.c" */
9996 if (dir_name
!= NULL
)
9998 include_name
= concat (dir_name
, SLASH_STRING
,
9999 include_name
, (char *)NULL
);
10000 include_name_to_compare
= include_name
;
10001 make_cleanup (xfree
, include_name
);
10003 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
10005 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
10006 include_name
, (char *)NULL
);
10010 pst_filename
= pst
->filename
;
10011 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
10013 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
10014 pst_filename
, (char *)NULL
);
10017 file_is_pst
= strcmp (include_name_to_compare
, pst_filename
) == 0;
10019 if (include_name_to_compare
!= include_name
)
10020 xfree (include_name_to_compare
);
10021 if (pst_filename
!= pst
->filename
)
10022 xfree (pst_filename
);
10026 return include_name
;
10029 /* Decode the Line Number Program (LNP) for the given line_header
10030 structure and CU. The actual information extracted and the type
10031 of structures created from the LNP depends on the value of PST.
10033 1. If PST is NULL, then this procedure uses the data from the program
10034 to create all necessary symbol tables, and their linetables.
10036 2. If PST is not NULL, this procedure reads the program to determine
10037 the list of files included by the unit represented by PST, and
10038 builds all the associated partial symbol tables.
10040 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10041 It is used for relative paths in the line table.
10042 NOTE: When processing partial symtabs (pst != NULL),
10043 comp_dir == pst->dirname.
10045 NOTE: It is important that psymtabs have the same file name (via strcmp)
10046 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10047 symtab we don't use it in the name of the psymtabs we create.
10048 E.g. expand_line_sal requires this when finding psymtabs to expand.
10049 A good testcase for this is mb-inline.exp. */
10052 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
10053 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10055 gdb_byte
*line_ptr
, *extended_end
;
10056 gdb_byte
*line_end
;
10057 unsigned int bytes_read
, extended_len
;
10058 unsigned char op_code
, extended_op
, adj_opcode
;
10059 CORE_ADDR baseaddr
;
10060 struct objfile
*objfile
= cu
->objfile
;
10061 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10062 const int decode_for_pst_p
= (pst
!= NULL
);
10063 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10065 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10067 line_ptr
= lh
->statement_program_start
;
10068 line_end
= lh
->statement_program_end
;
10070 /* Read the statement sequences until there's nothing left. */
10071 while (line_ptr
< line_end
)
10073 /* state machine registers */
10074 CORE_ADDR address
= 0;
10075 unsigned int file
= 1;
10076 unsigned int line
= 1;
10077 unsigned int column
= 0;
10078 int is_stmt
= lh
->default_is_stmt
;
10079 int basic_block
= 0;
10080 int end_sequence
= 0;
10082 unsigned char op_index
= 0;
10084 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10086 /* Start a subfile for the current file of the state machine. */
10087 /* lh->include_dirs and lh->file_names are 0-based, but the
10088 directory and file name numbers in the statement program
10090 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10094 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10096 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10099 /* Decode the table. */
10100 while (!end_sequence
)
10102 op_code
= read_1_byte (abfd
, line_ptr
);
10104 if (line_ptr
> line_end
)
10106 dwarf2_debug_line_missing_end_sequence_complaint ();
10110 if (op_code
>= lh
->opcode_base
)
10112 /* Special operand. */
10113 adj_opcode
= op_code
- lh
->opcode_base
;
10114 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10115 / lh
->maximum_ops_per_instruction
)
10116 * lh
->minimum_instruction_length
);
10117 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10118 % lh
->maximum_ops_per_instruction
);
10119 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10120 if (lh
->num_file_names
< file
|| file
== 0)
10121 dwarf2_debug_line_missing_file_complaint ();
10122 /* For now we ignore lines not starting on an
10123 instruction boundary. */
10124 else if (op_index
== 0)
10126 lh
->file_names
[file
- 1].included_p
= 1;
10127 if (!decode_for_pst_p
&& is_stmt
)
10129 if (last_subfile
!= current_subfile
)
10131 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10133 record_line (last_subfile
, 0, addr
);
10134 last_subfile
= current_subfile
;
10136 /* Append row to matrix using current values. */
10137 addr
= check_cu_functions (address
, cu
);
10138 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10139 record_line (current_subfile
, line
, addr
);
10144 else switch (op_code
)
10146 case DW_LNS_extended_op
:
10147 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10148 line_ptr
+= bytes_read
;
10149 extended_end
= line_ptr
+ extended_len
;
10150 extended_op
= read_1_byte (abfd
, line_ptr
);
10152 switch (extended_op
)
10154 case DW_LNE_end_sequence
:
10157 case DW_LNE_set_address
:
10158 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10160 line_ptr
+= bytes_read
;
10161 address
+= baseaddr
;
10163 case DW_LNE_define_file
:
10166 unsigned int dir_index
, mod_time
, length
;
10168 cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
);
10169 line_ptr
+= bytes_read
;
10171 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10172 line_ptr
+= bytes_read
;
10174 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10175 line_ptr
+= bytes_read
;
10177 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10178 line_ptr
+= bytes_read
;
10179 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10182 case DW_LNE_set_discriminator
:
10183 /* The discriminator is not interesting to the debugger;
10185 line_ptr
= extended_end
;
10188 complaint (&symfile_complaints
,
10189 _("mangled .debug_line section"));
10192 /* Make sure that we parsed the extended op correctly. If e.g.
10193 we expected a different address size than the producer used,
10194 we may have read the wrong number of bytes. */
10195 if (line_ptr
!= extended_end
)
10197 complaint (&symfile_complaints
,
10198 _("mangled .debug_line section"));
10203 if (lh
->num_file_names
< file
|| file
== 0)
10204 dwarf2_debug_line_missing_file_complaint ();
10207 lh
->file_names
[file
- 1].included_p
= 1;
10208 if (!decode_for_pst_p
&& is_stmt
)
10210 if (last_subfile
!= current_subfile
)
10212 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10214 record_line (last_subfile
, 0, addr
);
10215 last_subfile
= current_subfile
;
10217 addr
= check_cu_functions (address
, cu
);
10218 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10219 record_line (current_subfile
, line
, addr
);
10224 case DW_LNS_advance_pc
:
10227 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10229 address
+= (((op_index
+ adjust
)
10230 / lh
->maximum_ops_per_instruction
)
10231 * lh
->minimum_instruction_length
);
10232 op_index
= ((op_index
+ adjust
)
10233 % lh
->maximum_ops_per_instruction
);
10234 line_ptr
+= bytes_read
;
10237 case DW_LNS_advance_line
:
10238 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10239 line_ptr
+= bytes_read
;
10241 case DW_LNS_set_file
:
10243 /* The arrays lh->include_dirs and lh->file_names are
10244 0-based, but the directory and file name numbers in
10245 the statement program are 1-based. */
10246 struct file_entry
*fe
;
10249 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10250 line_ptr
+= bytes_read
;
10251 if (lh
->num_file_names
< file
|| file
== 0)
10252 dwarf2_debug_line_missing_file_complaint ();
10255 fe
= &lh
->file_names
[file
- 1];
10257 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10258 if (!decode_for_pst_p
)
10260 last_subfile
= current_subfile
;
10261 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10266 case DW_LNS_set_column
:
10267 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10268 line_ptr
+= bytes_read
;
10270 case DW_LNS_negate_stmt
:
10271 is_stmt
= (!is_stmt
);
10273 case DW_LNS_set_basic_block
:
10276 /* Add to the address register of the state machine the
10277 address increment value corresponding to special opcode
10278 255. I.e., this value is scaled by the minimum
10279 instruction length since special opcode 255 would have
10280 scaled the the increment. */
10281 case DW_LNS_const_add_pc
:
10283 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10285 address
+= (((op_index
+ adjust
)
10286 / lh
->maximum_ops_per_instruction
)
10287 * lh
->minimum_instruction_length
);
10288 op_index
= ((op_index
+ adjust
)
10289 % lh
->maximum_ops_per_instruction
);
10292 case DW_LNS_fixed_advance_pc
:
10293 address
+= read_2_bytes (abfd
, line_ptr
);
10299 /* Unknown standard opcode, ignore it. */
10302 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10304 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10305 line_ptr
+= bytes_read
;
10310 if (lh
->num_file_names
< file
|| file
== 0)
10311 dwarf2_debug_line_missing_file_complaint ();
10314 lh
->file_names
[file
- 1].included_p
= 1;
10315 if (!decode_for_pst_p
)
10317 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10318 record_line (current_subfile
, 0, addr
);
10323 if (decode_for_pst_p
)
10327 /* Now that we're done scanning the Line Header Program, we can
10328 create the psymtab of each included file. */
10329 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10330 if (lh
->file_names
[file_index
].included_p
== 1)
10332 char *include_name
=
10333 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10334 if (include_name
!= NULL
)
10335 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10340 /* Make sure a symtab is created for every file, even files
10341 which contain only variables (i.e. no code with associated
10345 struct file_entry
*fe
;
10347 for (i
= 0; i
< lh
->num_file_names
; i
++)
10351 fe
= &lh
->file_names
[i
];
10353 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10354 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10356 /* Skip the main file; we don't need it, and it must be
10357 allocated last, so that it will show up before the
10358 non-primary symtabs in the objfile's symtab list. */
10359 if (current_subfile
== first_subfile
)
10362 if (current_subfile
->symtab
== NULL
)
10363 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10365 fe
->symtab
= current_subfile
->symtab
;
10370 /* Start a subfile for DWARF. FILENAME is the name of the file and
10371 DIRNAME the name of the source directory which contains FILENAME
10372 or NULL if not known. COMP_DIR is the compilation directory for the
10373 linetable's compilation unit or NULL if not known.
10374 This routine tries to keep line numbers from identical absolute and
10375 relative file names in a common subfile.
10377 Using the `list' example from the GDB testsuite, which resides in
10378 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10379 of /srcdir/list0.c yields the following debugging information for list0.c:
10381 DW_AT_name: /srcdir/list0.c
10382 DW_AT_comp_dir: /compdir
10383 files.files[0].name: list0.h
10384 files.files[0].dir: /srcdir
10385 files.files[1].name: list0.c
10386 files.files[1].dir: /srcdir
10388 The line number information for list0.c has to end up in a single
10389 subfile, so that `break /srcdir/list0.c:1' works as expected.
10390 start_subfile will ensure that this happens provided that we pass the
10391 concatenation of files.files[1].dir and files.files[1].name as the
10395 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
10399 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10400 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10401 second argument to start_subfile. To be consistent, we do the
10402 same here. In order not to lose the line information directory,
10403 we concatenate it to the filename when it makes sense.
10404 Note that the Dwarf3 standard says (speaking of filenames in line
10405 information): ``The directory index is ignored for file names
10406 that represent full path names''. Thus ignoring dirname in the
10407 `else' branch below isn't an issue. */
10409 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10410 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10412 fullname
= filename
;
10414 start_subfile (fullname
, comp_dir
);
10416 if (fullname
!= filename
)
10421 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10422 struct dwarf2_cu
*cu
)
10424 struct objfile
*objfile
= cu
->objfile
;
10425 struct comp_unit_head
*cu_header
= &cu
->header
;
10427 /* NOTE drow/2003-01-30: There used to be a comment and some special
10428 code here to turn a symbol with DW_AT_external and a
10429 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10430 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10431 with some versions of binutils) where shared libraries could have
10432 relocations against symbols in their debug information - the
10433 minimal symbol would have the right address, but the debug info
10434 would not. It's no longer necessary, because we will explicitly
10435 apply relocations when we read in the debug information now. */
10437 /* A DW_AT_location attribute with no contents indicates that a
10438 variable has been optimized away. */
10439 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10441 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10445 /* Handle one degenerate form of location expression specially, to
10446 preserve GDB's previous behavior when section offsets are
10447 specified. If this is just a DW_OP_addr then mark this symbol
10450 if (attr_form_is_block (attr
)
10451 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10452 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10454 unsigned int dummy
;
10456 SYMBOL_VALUE_ADDRESS (sym
) =
10457 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10458 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10459 fixup_symbol_section (sym
, objfile
);
10460 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10461 SYMBOL_SECTION (sym
));
10465 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10466 expression evaluator, and use LOC_COMPUTED only when necessary
10467 (i.e. when the value of a register or memory location is
10468 referenced, or a thread-local block, etc.). Then again, it might
10469 not be worthwhile. I'm assuming that it isn't unless performance
10470 or memory numbers show me otherwise. */
10472 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10473 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10476 /* Given a pointer to a DWARF information entry, figure out if we need
10477 to make a symbol table entry for it, and if so, create a new entry
10478 and return a pointer to it.
10479 If TYPE is NULL, determine symbol type from the die, otherwise
10480 used the passed type.
10481 If SPACE is not NULL, use it to hold the new symbol. If it is
10482 NULL, allocate a new symbol on the objfile's obstack. */
10484 static struct symbol
*
10485 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10486 struct symbol
*space
)
10488 struct objfile
*objfile
= cu
->objfile
;
10489 struct symbol
*sym
= NULL
;
10491 struct attribute
*attr
= NULL
;
10492 struct attribute
*attr2
= NULL
;
10493 CORE_ADDR baseaddr
;
10494 struct pending
**list_to_add
= NULL
;
10496 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10498 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10500 name
= dwarf2_name (die
, cu
);
10503 const char *linkagename
;
10504 int suppress_add
= 0;
10509 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10510 OBJSTAT (objfile
, n_syms
++);
10512 /* Cache this symbol's name and the name's demangled form (if any). */
10513 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10514 linkagename
= dwarf2_physname (name
, die
, cu
);
10515 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10517 /* Fortran does not have mangling standard and the mangling does differ
10518 between gfortran, iFort etc. */
10519 if (cu
->language
== language_fortran
10520 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10521 symbol_set_demangled_name (&(sym
->ginfo
),
10522 (char *) dwarf2_full_name (name
, die
, cu
),
10525 /* Default assumptions.
10526 Use the passed type or decode it from the die. */
10527 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10528 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10530 SYMBOL_TYPE (sym
) = type
;
10532 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10533 attr
= dwarf2_attr (die
,
10534 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10538 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10541 attr
= dwarf2_attr (die
,
10542 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10546 int file_index
= DW_UNSND (attr
);
10548 if (cu
->line_header
== NULL
10549 || file_index
> cu
->line_header
->num_file_names
)
10550 complaint (&symfile_complaints
,
10551 _("file index out of range"));
10552 else if (file_index
> 0)
10554 struct file_entry
*fe
;
10556 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10557 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10564 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10567 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10569 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10570 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10571 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10572 add_symbol_to_list (sym
, cu
->list_in_scope
);
10574 case DW_TAG_subprogram
:
10575 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10577 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10578 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10579 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10580 || cu
->language
== language_ada
)
10582 /* Subprograms marked external are stored as a global symbol.
10583 Ada subprograms, whether marked external or not, are always
10584 stored as a global symbol, because we want to be able to
10585 access them globally. For instance, we want to be able
10586 to break on a nested subprogram without having to
10587 specify the context. */
10588 list_to_add
= &global_symbols
;
10592 list_to_add
= cu
->list_in_scope
;
10595 case DW_TAG_inlined_subroutine
:
10596 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10598 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10599 SYMBOL_INLINED (sym
) = 1;
10600 /* Do not add the symbol to any lists. It will be found via
10601 BLOCK_FUNCTION from the blockvector. */
10603 case DW_TAG_template_value_param
:
10605 /* Fall through. */
10606 case DW_TAG_variable
:
10607 case DW_TAG_member
:
10608 /* Compilation with minimal debug info may result in variables
10609 with missing type entries. Change the misleading `void' type
10610 to something sensible. */
10611 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10613 = objfile_type (objfile
)->nodebug_data_symbol
;
10615 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10616 /* In the case of DW_TAG_member, we should only be called for
10617 static const members. */
10618 if (die
->tag
== DW_TAG_member
)
10620 /* dwarf2_add_field uses die_is_declaration,
10621 so we do the same. */
10622 gdb_assert (die_is_declaration (die
, cu
));
10627 dwarf2_const_value (attr
, sym
, cu
);
10628 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10631 if (attr2
&& (DW_UNSND (attr2
) != 0))
10632 list_to_add
= &global_symbols
;
10634 list_to_add
= cu
->list_in_scope
;
10638 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10641 var_decode_location (attr
, sym
, cu
);
10642 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10643 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10644 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10645 && !dwarf2_per_objfile
->has_section_at_zero
)
10647 /* When a static variable is eliminated by the linker,
10648 the corresponding debug information is not stripped
10649 out, but the variable address is set to null;
10650 do not add such variables into symbol table. */
10652 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10654 /* Workaround gfortran PR debug/40040 - it uses
10655 DW_AT_location for variables in -fPIC libraries which may
10656 get overriden by other libraries/executable and get
10657 a different address. Resolve it by the minimal symbol
10658 which may come from inferior's executable using copy
10659 relocation. Make this workaround only for gfortran as for
10660 other compilers GDB cannot guess the minimal symbol
10661 Fortran mangling kind. */
10662 if (cu
->language
== language_fortran
&& die
->parent
10663 && die
->parent
->tag
== DW_TAG_module
10665 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10666 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10668 /* A variable with DW_AT_external is never static,
10669 but it may be block-scoped. */
10670 list_to_add
= (cu
->list_in_scope
== &file_symbols
10671 ? &global_symbols
: cu
->list_in_scope
);
10674 list_to_add
= cu
->list_in_scope
;
10678 /* We do not know the address of this symbol.
10679 If it is an external symbol and we have type information
10680 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10681 The address of the variable will then be determined from
10682 the minimal symbol table whenever the variable is
10684 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10685 if (attr2
&& (DW_UNSND (attr2
) != 0)
10686 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10688 /* A variable with DW_AT_external is never static, but it
10689 may be block-scoped. */
10690 list_to_add
= (cu
->list_in_scope
== &file_symbols
10691 ? &global_symbols
: cu
->list_in_scope
);
10693 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10695 else if (!die_is_declaration (die
, cu
))
10697 /* Use the default LOC_OPTIMIZED_OUT class. */
10698 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10700 list_to_add
= cu
->list_in_scope
;
10704 case DW_TAG_formal_parameter
:
10705 /* If we are inside a function, mark this as an argument. If
10706 not, we might be looking at an argument to an inlined function
10707 when we do not have enough information to show inlined frames;
10708 pretend it's a local variable in that case so that the user can
10710 if (context_stack_depth
> 0
10711 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10712 SYMBOL_IS_ARGUMENT (sym
) = 1;
10713 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10716 var_decode_location (attr
, sym
, cu
);
10718 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10721 dwarf2_const_value (attr
, sym
, cu
);
10723 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10724 if (attr
&& DW_UNSND (attr
))
10726 struct type
*ref_type
;
10728 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10729 SYMBOL_TYPE (sym
) = ref_type
;
10732 list_to_add
= cu
->list_in_scope
;
10734 case DW_TAG_unspecified_parameters
:
10735 /* From varargs functions; gdb doesn't seem to have any
10736 interest in this information, so just ignore it for now.
10739 case DW_TAG_template_type_param
:
10741 /* Fall through. */
10742 case DW_TAG_class_type
:
10743 case DW_TAG_interface_type
:
10744 case DW_TAG_structure_type
:
10745 case DW_TAG_union_type
:
10746 case DW_TAG_set_type
:
10747 case DW_TAG_enumeration_type
:
10748 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10749 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
10752 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10753 really ever be static objects: otherwise, if you try
10754 to, say, break of a class's method and you're in a file
10755 which doesn't mention that class, it won't work unless
10756 the check for all static symbols in lookup_symbol_aux
10757 saves you. See the OtherFileClass tests in
10758 gdb.c++/namespace.exp. */
10762 list_to_add
= (cu
->list_in_scope
== &file_symbols
10763 && (cu
->language
== language_cplus
10764 || cu
->language
== language_java
)
10765 ? &global_symbols
: cu
->list_in_scope
);
10767 /* The semantics of C++ state that "struct foo {
10768 ... }" also defines a typedef for "foo". A Java
10769 class declaration also defines a typedef for the
10771 if (cu
->language
== language_cplus
10772 || cu
->language
== language_java
10773 || cu
->language
== language_ada
)
10775 /* The symbol's name is already allocated along
10776 with this objfile, so we don't need to
10777 duplicate it for the type. */
10778 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
10779 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
10784 case DW_TAG_typedef
:
10785 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10786 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10787 list_to_add
= cu
->list_in_scope
;
10789 case DW_TAG_base_type
:
10790 case DW_TAG_subrange_type
:
10791 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10792 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10793 list_to_add
= cu
->list_in_scope
;
10795 case DW_TAG_enumerator
:
10796 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10799 dwarf2_const_value (attr
, sym
, cu
);
10802 /* NOTE: carlton/2003-11-10: See comment above in the
10803 DW_TAG_class_type, etc. block. */
10805 list_to_add
= (cu
->list_in_scope
== &file_symbols
10806 && (cu
->language
== language_cplus
10807 || cu
->language
== language_java
)
10808 ? &global_symbols
: cu
->list_in_scope
);
10811 case DW_TAG_namespace
:
10812 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10813 list_to_add
= &global_symbols
;
10816 /* Not a tag we recognize. Hopefully we aren't processing
10817 trash data, but since we must specifically ignore things
10818 we don't recognize, there is nothing else we should do at
10820 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
10821 dwarf_tag_name (die
->tag
));
10827 sym
->hash_next
= objfile
->template_symbols
;
10828 objfile
->template_symbols
= sym
;
10829 list_to_add
= NULL
;
10832 if (list_to_add
!= NULL
)
10833 add_symbol_to_list (sym
, list_to_add
);
10835 /* For the benefit of old versions of GCC, check for anonymous
10836 namespaces based on the demangled name. */
10837 if (!processing_has_namespace_info
10838 && cu
->language
== language_cplus
)
10839 cp_scan_for_anonymous_namespaces (sym
);
10844 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10846 static struct symbol
*
10847 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10849 return new_symbol_full (die
, type
, cu
, NULL
);
10852 /* Given an attr with a DW_FORM_dataN value in host byte order,
10853 zero-extend it as appropriate for the symbol's type. The DWARF
10854 standard (v4) is not entirely clear about the meaning of using
10855 DW_FORM_dataN for a constant with a signed type, where the type is
10856 wider than the data. The conclusion of a discussion on the DWARF
10857 list was that this is unspecified. We choose to always zero-extend
10858 because that is the interpretation long in use by GCC. */
10861 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
10862 const char *name
, struct obstack
*obstack
,
10863 struct dwarf2_cu
*cu
, long *value
, int bits
)
10865 struct objfile
*objfile
= cu
->objfile
;
10866 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
10867 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
10868 LONGEST l
= DW_UNSND (attr
);
10870 if (bits
< sizeof (*value
) * 8)
10872 l
&= ((LONGEST
) 1 << bits
) - 1;
10875 else if (bits
== sizeof (*value
) * 8)
10879 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
10880 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
10887 /* Read a constant value from an attribute. Either set *VALUE, or if
10888 the value does not fit in *VALUE, set *BYTES - either already
10889 allocated on the objfile obstack, or newly allocated on OBSTACK,
10890 or, set *BATON, if we translated the constant to a location
10894 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
10895 const char *name
, struct obstack
*obstack
,
10896 struct dwarf2_cu
*cu
,
10897 long *value
, gdb_byte
**bytes
,
10898 struct dwarf2_locexpr_baton
**baton
)
10900 struct objfile
*objfile
= cu
->objfile
;
10901 struct comp_unit_head
*cu_header
= &cu
->header
;
10902 struct dwarf_block
*blk
;
10903 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
10904 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
10910 switch (attr
->form
)
10916 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
10917 dwarf2_const_value_length_mismatch_complaint (name
,
10918 cu_header
->addr_size
,
10919 TYPE_LENGTH (type
));
10920 /* Symbols of this form are reasonably rare, so we just
10921 piggyback on the existing location code rather than writing
10922 a new implementation of symbol_computed_ops. */
10923 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
10924 sizeof (struct dwarf2_locexpr_baton
));
10925 (*baton
)->per_cu
= cu
->per_cu
;
10926 gdb_assert ((*baton
)->per_cu
);
10928 (*baton
)->size
= 2 + cu_header
->addr_size
;
10929 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
10930 (*baton
)->data
= data
;
10932 data
[0] = DW_OP_addr
;
10933 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
10934 byte_order
, DW_ADDR (attr
));
10935 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
10938 case DW_FORM_string
:
10940 /* DW_STRING is already allocated on the objfile obstack, point
10942 *bytes
= (gdb_byte
*) DW_STRING (attr
);
10944 case DW_FORM_block1
:
10945 case DW_FORM_block2
:
10946 case DW_FORM_block4
:
10947 case DW_FORM_block
:
10948 case DW_FORM_exprloc
:
10949 blk
= DW_BLOCK (attr
);
10950 if (TYPE_LENGTH (type
) != blk
->size
)
10951 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
10952 TYPE_LENGTH (type
));
10953 *bytes
= blk
->data
;
10956 /* The DW_AT_const_value attributes are supposed to carry the
10957 symbol's value "represented as it would be on the target
10958 architecture." By the time we get here, it's already been
10959 converted to host endianness, so we just need to sign- or
10960 zero-extend it as appropriate. */
10961 case DW_FORM_data1
:
10962 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 8);
10964 case DW_FORM_data2
:
10965 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 16);
10967 case DW_FORM_data4
:
10968 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 32);
10970 case DW_FORM_data8
:
10971 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 64);
10974 case DW_FORM_sdata
:
10975 *value
= DW_SND (attr
);
10978 case DW_FORM_udata
:
10979 *value
= DW_UNSND (attr
);
10983 complaint (&symfile_complaints
,
10984 _("unsupported const value attribute form: '%s'"),
10985 dwarf_form_name (attr
->form
));
10992 /* Copy constant value from an attribute to a symbol. */
10995 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
10996 struct dwarf2_cu
*cu
)
10998 struct objfile
*objfile
= cu
->objfile
;
10999 struct comp_unit_head
*cu_header
= &cu
->header
;
11002 struct dwarf2_locexpr_baton
*baton
;
11004 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
11005 SYMBOL_PRINT_NAME (sym
),
11006 &objfile
->objfile_obstack
, cu
,
11007 &value
, &bytes
, &baton
);
11011 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11012 SYMBOL_LOCATION_BATON (sym
) = baton
;
11013 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11015 else if (bytes
!= NULL
)
11017 SYMBOL_VALUE_BYTES (sym
) = bytes
;
11018 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11022 SYMBOL_VALUE (sym
) = value
;
11023 SYMBOL_CLASS (sym
) = LOC_CONST
;
11027 /* Return the type of the die in question using its DW_AT_type attribute. */
11029 static struct type
*
11030 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11032 struct attribute
*type_attr
;
11034 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11037 /* A missing DW_AT_type represents a void type. */
11038 return objfile_type (cu
->objfile
)->builtin_void
;
11041 return lookup_die_type (die
, type_attr
, cu
);
11044 /* True iff CU's producer generates GNAT Ada auxiliary information
11045 that allows to find parallel types through that information instead
11046 of having to do expensive parallel lookups by type name. */
11049 need_gnat_info (struct dwarf2_cu
*cu
)
11051 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11052 of GNAT produces this auxiliary information, without any indication
11053 that it is produced. Part of enhancing the FSF version of GNAT
11054 to produce that information will be to put in place an indicator
11055 that we can use in order to determine whether the descriptive type
11056 info is available or not. One suggestion that has been made is
11057 to use a new attribute, attached to the CU die. For now, assume
11058 that the descriptive type info is not available. */
11062 /* Return the auxiliary type of the die in question using its
11063 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11064 attribute is not present. */
11066 static struct type
*
11067 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11069 struct attribute
*type_attr
;
11071 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11075 return lookup_die_type (die
, type_attr
, cu
);
11078 /* If DIE has a descriptive_type attribute, then set the TYPE's
11079 descriptive type accordingly. */
11082 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11083 struct dwarf2_cu
*cu
)
11085 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11087 if (descriptive_type
)
11089 ALLOCATE_GNAT_AUX_TYPE (type
);
11090 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11094 /* Return the containing type of the die in question using its
11095 DW_AT_containing_type attribute. */
11097 static struct type
*
11098 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11100 struct attribute
*type_attr
;
11102 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11104 error (_("Dwarf Error: Problem turning containing type into gdb type "
11105 "[in module %s]"), cu
->objfile
->name
);
11107 return lookup_die_type (die
, type_attr
, cu
);
11110 /* Look up the type of DIE in CU using its type attribute ATTR.
11111 If there is no type substitute an error marker. */
11113 static struct type
*
11114 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11115 struct dwarf2_cu
*cu
)
11117 struct type
*this_type
;
11119 /* First see if we have it cached. */
11121 if (is_ref_attr (attr
))
11123 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11125 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11127 else if (attr
->form
== DW_FORM_sig8
)
11129 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11130 struct dwarf2_cu
*sig_cu
;
11131 unsigned int offset
;
11133 /* sig_type will be NULL if the signatured type is missing from
11135 if (sig_type
== NULL
)
11136 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11137 "at 0x%x [in module %s]"),
11138 die
->offset
, cu
->objfile
->name
);
11140 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11141 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11142 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11146 dump_die_for_error (die
);
11147 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11148 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11151 /* If not cached we need to read it in. */
11153 if (this_type
== NULL
)
11155 struct die_info
*type_die
;
11156 struct dwarf2_cu
*type_cu
= cu
;
11158 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11159 /* If the type is cached, we should have found it above. */
11160 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11161 this_type
= read_type_die_1 (type_die
, type_cu
);
11164 /* If we still don't have a type use an error marker. */
11166 if (this_type
== NULL
)
11168 char *message
, *saved
;
11170 /* read_type_die already issued a complaint. */
11171 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11175 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11176 message
, strlen (message
));
11179 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11185 /* Return the type in DIE, CU.
11186 Returns NULL for invalid types.
11188 This first does a lookup in the appropriate type_hash table,
11189 and only reads the die in if necessary.
11191 NOTE: This can be called when reading in partial or full symbols. */
11193 static struct type
*
11194 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11196 struct type
*this_type
;
11198 this_type
= get_die_type (die
, cu
);
11202 return read_type_die_1 (die
, cu
);
11205 /* Read the type in DIE, CU.
11206 Returns NULL for invalid types. */
11208 static struct type
*
11209 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11211 struct type
*this_type
= NULL
;
11215 case DW_TAG_class_type
:
11216 case DW_TAG_interface_type
:
11217 case DW_TAG_structure_type
:
11218 case DW_TAG_union_type
:
11219 this_type
= read_structure_type (die
, cu
);
11221 case DW_TAG_enumeration_type
:
11222 this_type
= read_enumeration_type (die
, cu
);
11224 case DW_TAG_subprogram
:
11225 case DW_TAG_subroutine_type
:
11226 case DW_TAG_inlined_subroutine
:
11227 this_type
= read_subroutine_type (die
, cu
);
11229 case DW_TAG_array_type
:
11230 this_type
= read_array_type (die
, cu
);
11232 case DW_TAG_set_type
:
11233 this_type
= read_set_type (die
, cu
);
11235 case DW_TAG_pointer_type
:
11236 this_type
= read_tag_pointer_type (die
, cu
);
11238 case DW_TAG_ptr_to_member_type
:
11239 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11241 case DW_TAG_reference_type
:
11242 this_type
= read_tag_reference_type (die
, cu
);
11244 case DW_TAG_const_type
:
11245 this_type
= read_tag_const_type (die
, cu
);
11247 case DW_TAG_volatile_type
:
11248 this_type
= read_tag_volatile_type (die
, cu
);
11250 case DW_TAG_string_type
:
11251 this_type
= read_tag_string_type (die
, cu
);
11253 case DW_TAG_typedef
:
11254 this_type
= read_typedef (die
, cu
);
11256 case DW_TAG_subrange_type
:
11257 this_type
= read_subrange_type (die
, cu
);
11259 case DW_TAG_base_type
:
11260 this_type
= read_base_type (die
, cu
);
11262 case DW_TAG_unspecified_type
:
11263 this_type
= read_unspecified_type (die
, cu
);
11265 case DW_TAG_namespace
:
11266 this_type
= read_namespace_type (die
, cu
);
11268 case DW_TAG_module
:
11269 this_type
= read_module_type (die
, cu
);
11272 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
11273 dwarf_tag_name (die
->tag
));
11280 /* Return the name of the namespace/class that DIE is defined within,
11281 or "" if we can't tell. The caller should not xfree the result.
11283 For example, if we're within the method foo() in the following
11293 then determine_prefix on foo's die will return "N::C". */
11296 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11298 struct die_info
*parent
, *spec_die
;
11299 struct dwarf2_cu
*spec_cu
;
11300 struct type
*parent_type
;
11302 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11303 && cu
->language
!= language_fortran
)
11306 /* We have to be careful in the presence of DW_AT_specification.
11307 For example, with GCC 3.4, given the code
11311 // Definition of N::foo.
11315 then we'll have a tree of DIEs like this:
11317 1: DW_TAG_compile_unit
11318 2: DW_TAG_namespace // N
11319 3: DW_TAG_subprogram // declaration of N::foo
11320 4: DW_TAG_subprogram // definition of N::foo
11321 DW_AT_specification // refers to die #3
11323 Thus, when processing die #4, we have to pretend that we're in
11324 the context of its DW_AT_specification, namely the contex of die
11327 spec_die
= die_specification (die
, &spec_cu
);
11328 if (spec_die
== NULL
)
11329 parent
= die
->parent
;
11332 parent
= spec_die
->parent
;
11336 if (parent
== NULL
)
11338 else if (parent
->building_fullname
)
11341 const char *parent_name
;
11343 /* It has been seen on RealView 2.2 built binaries,
11344 DW_TAG_template_type_param types actually _defined_ as
11345 children of the parent class:
11348 template class <class Enum> Class{};
11349 Class<enum E> class_e;
11351 1: DW_TAG_class_type (Class)
11352 2: DW_TAG_enumeration_type (E)
11353 3: DW_TAG_enumerator (enum1:0)
11354 3: DW_TAG_enumerator (enum2:1)
11356 2: DW_TAG_template_type_param
11357 DW_AT_type DW_FORM_ref_udata (E)
11359 Besides being broken debug info, it can put GDB into an
11360 infinite loop. Consider:
11362 When we're building the full name for Class<E>, we'll start
11363 at Class, and go look over its template type parameters,
11364 finding E. We'll then try to build the full name of E, and
11365 reach here. We're now trying to build the full name of E,
11366 and look over the parent DIE for containing scope. In the
11367 broken case, if we followed the parent DIE of E, we'd again
11368 find Class, and once again go look at its template type
11369 arguments, etc., etc. Simply don't consider such parent die
11370 as source-level parent of this die (it can't be, the language
11371 doesn't allow it), and break the loop here. */
11372 name
= dwarf2_name (die
, cu
);
11373 parent_name
= dwarf2_name (parent
, cu
);
11374 complaint (&symfile_complaints
,
11375 _("template param type '%s' defined within parent '%s'"),
11376 name
? name
: "<unknown>",
11377 parent_name
? parent_name
: "<unknown>");
11381 switch (parent
->tag
)
11383 case DW_TAG_namespace
:
11384 parent_type
= read_type_die (parent
, cu
);
11385 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11386 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11387 Work around this problem here. */
11388 if (cu
->language
== language_cplus
11389 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11391 /* We give a name to even anonymous namespaces. */
11392 return TYPE_TAG_NAME (parent_type
);
11393 case DW_TAG_class_type
:
11394 case DW_TAG_interface_type
:
11395 case DW_TAG_structure_type
:
11396 case DW_TAG_union_type
:
11397 case DW_TAG_module
:
11398 parent_type
= read_type_die (parent
, cu
);
11399 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11400 return TYPE_TAG_NAME (parent_type
);
11402 /* An anonymous structure is only allowed non-static data
11403 members; no typedefs, no member functions, et cetera.
11404 So it does not need a prefix. */
11407 return determine_prefix (parent
, cu
);
11411 /* Return a newly-allocated string formed by concatenating PREFIX and
11412 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11413 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11414 perform an obconcat, otherwise allocate storage for the result. The CU argument
11415 is used to determine the language and hence, the appropriate separator. */
11417 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11420 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11421 int physname
, struct dwarf2_cu
*cu
)
11423 const char *lead
= "";
11426 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
11428 else if (cu
->language
== language_java
)
11430 else if (cu
->language
== language_fortran
&& physname
)
11432 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11433 DW_AT_MIPS_linkage_name is preferred and used instead. */
11441 if (prefix
== NULL
)
11443 if (suffix
== NULL
)
11448 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11450 strcpy (retval
, lead
);
11451 strcat (retval
, prefix
);
11452 strcat (retval
, sep
);
11453 strcat (retval
, suffix
);
11458 /* We have an obstack. */
11459 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11463 /* Return sibling of die, NULL if no sibling. */
11465 static struct die_info
*
11466 sibling_die (struct die_info
*die
)
11468 return die
->sibling
;
11471 /* Get name of a die, return NULL if not found. */
11474 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11475 struct obstack
*obstack
)
11477 if (name
&& cu
->language
== language_cplus
)
11479 char *canon_name
= cp_canonicalize_string (name
);
11481 if (canon_name
!= NULL
)
11483 if (strcmp (canon_name
, name
) != 0)
11484 name
= obsavestring (canon_name
, strlen (canon_name
),
11486 xfree (canon_name
);
11493 /* Get name of a die, return NULL if not found. */
11496 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11498 struct attribute
*attr
;
11500 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11501 if (!attr
|| !DW_STRING (attr
))
11506 case DW_TAG_compile_unit
:
11507 /* Compilation units have a DW_AT_name that is a filename, not
11508 a source language identifier. */
11509 case DW_TAG_enumeration_type
:
11510 case DW_TAG_enumerator
:
11511 /* These tags always have simple identifiers already; no need
11512 to canonicalize them. */
11513 return DW_STRING (attr
);
11515 case DW_TAG_subprogram
:
11516 /* Java constructors will all be named "<init>", so return
11517 the class name when we see this special case. */
11518 if (cu
->language
== language_java
11519 && DW_STRING (attr
) != NULL
11520 && strcmp (DW_STRING (attr
), "<init>") == 0)
11522 struct dwarf2_cu
*spec_cu
= cu
;
11523 struct die_info
*spec_die
;
11525 /* GCJ will output '<init>' for Java constructor names.
11526 For this special case, return the name of the parent class. */
11528 /* GCJ may output suprogram DIEs with AT_specification set.
11529 If so, use the name of the specified DIE. */
11530 spec_die
= die_specification (die
, &spec_cu
);
11531 if (spec_die
!= NULL
)
11532 return dwarf2_name (spec_die
, spec_cu
);
11537 if (die
->tag
== DW_TAG_class_type
)
11538 return dwarf2_name (die
, cu
);
11540 while (die
->tag
!= DW_TAG_compile_unit
);
11544 case DW_TAG_class_type
:
11545 case DW_TAG_interface_type
:
11546 case DW_TAG_structure_type
:
11547 case DW_TAG_union_type
:
11548 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11549 structures or unions. These were of the form "._%d" in GCC 4.1,
11550 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11551 and GCC 4.4. We work around this problem by ignoring these. */
11552 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11553 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11561 if (!DW_STRING_IS_CANONICAL (attr
))
11564 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11565 &cu
->objfile
->objfile_obstack
);
11566 DW_STRING_IS_CANONICAL (attr
) = 1;
11568 return DW_STRING (attr
);
11571 /* Return the die that this die in an extension of, or NULL if there
11572 is none. *EXT_CU is the CU containing DIE on input, and the CU
11573 containing the return value on output. */
11575 static struct die_info
*
11576 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11578 struct attribute
*attr
;
11580 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11584 return follow_die_ref (die
, attr
, ext_cu
);
11587 /* Convert a DIE tag into its string name. */
11590 dwarf_tag_name (unsigned tag
)
11594 case DW_TAG_padding
:
11595 return "DW_TAG_padding";
11596 case DW_TAG_array_type
:
11597 return "DW_TAG_array_type";
11598 case DW_TAG_class_type
:
11599 return "DW_TAG_class_type";
11600 case DW_TAG_entry_point
:
11601 return "DW_TAG_entry_point";
11602 case DW_TAG_enumeration_type
:
11603 return "DW_TAG_enumeration_type";
11604 case DW_TAG_formal_parameter
:
11605 return "DW_TAG_formal_parameter";
11606 case DW_TAG_imported_declaration
:
11607 return "DW_TAG_imported_declaration";
11609 return "DW_TAG_label";
11610 case DW_TAG_lexical_block
:
11611 return "DW_TAG_lexical_block";
11612 case DW_TAG_member
:
11613 return "DW_TAG_member";
11614 case DW_TAG_pointer_type
:
11615 return "DW_TAG_pointer_type";
11616 case DW_TAG_reference_type
:
11617 return "DW_TAG_reference_type";
11618 case DW_TAG_compile_unit
:
11619 return "DW_TAG_compile_unit";
11620 case DW_TAG_string_type
:
11621 return "DW_TAG_string_type";
11622 case DW_TAG_structure_type
:
11623 return "DW_TAG_structure_type";
11624 case DW_TAG_subroutine_type
:
11625 return "DW_TAG_subroutine_type";
11626 case DW_TAG_typedef
:
11627 return "DW_TAG_typedef";
11628 case DW_TAG_union_type
:
11629 return "DW_TAG_union_type";
11630 case DW_TAG_unspecified_parameters
:
11631 return "DW_TAG_unspecified_parameters";
11632 case DW_TAG_variant
:
11633 return "DW_TAG_variant";
11634 case DW_TAG_common_block
:
11635 return "DW_TAG_common_block";
11636 case DW_TAG_common_inclusion
:
11637 return "DW_TAG_common_inclusion";
11638 case DW_TAG_inheritance
:
11639 return "DW_TAG_inheritance";
11640 case DW_TAG_inlined_subroutine
:
11641 return "DW_TAG_inlined_subroutine";
11642 case DW_TAG_module
:
11643 return "DW_TAG_module";
11644 case DW_TAG_ptr_to_member_type
:
11645 return "DW_TAG_ptr_to_member_type";
11646 case DW_TAG_set_type
:
11647 return "DW_TAG_set_type";
11648 case DW_TAG_subrange_type
:
11649 return "DW_TAG_subrange_type";
11650 case DW_TAG_with_stmt
:
11651 return "DW_TAG_with_stmt";
11652 case DW_TAG_access_declaration
:
11653 return "DW_TAG_access_declaration";
11654 case DW_TAG_base_type
:
11655 return "DW_TAG_base_type";
11656 case DW_TAG_catch_block
:
11657 return "DW_TAG_catch_block";
11658 case DW_TAG_const_type
:
11659 return "DW_TAG_const_type";
11660 case DW_TAG_constant
:
11661 return "DW_TAG_constant";
11662 case DW_TAG_enumerator
:
11663 return "DW_TAG_enumerator";
11664 case DW_TAG_file_type
:
11665 return "DW_TAG_file_type";
11666 case DW_TAG_friend
:
11667 return "DW_TAG_friend";
11668 case DW_TAG_namelist
:
11669 return "DW_TAG_namelist";
11670 case DW_TAG_namelist_item
:
11671 return "DW_TAG_namelist_item";
11672 case DW_TAG_packed_type
:
11673 return "DW_TAG_packed_type";
11674 case DW_TAG_subprogram
:
11675 return "DW_TAG_subprogram";
11676 case DW_TAG_template_type_param
:
11677 return "DW_TAG_template_type_param";
11678 case DW_TAG_template_value_param
:
11679 return "DW_TAG_template_value_param";
11680 case DW_TAG_thrown_type
:
11681 return "DW_TAG_thrown_type";
11682 case DW_TAG_try_block
:
11683 return "DW_TAG_try_block";
11684 case DW_TAG_variant_part
:
11685 return "DW_TAG_variant_part";
11686 case DW_TAG_variable
:
11687 return "DW_TAG_variable";
11688 case DW_TAG_volatile_type
:
11689 return "DW_TAG_volatile_type";
11690 case DW_TAG_dwarf_procedure
:
11691 return "DW_TAG_dwarf_procedure";
11692 case DW_TAG_restrict_type
:
11693 return "DW_TAG_restrict_type";
11694 case DW_TAG_interface_type
:
11695 return "DW_TAG_interface_type";
11696 case DW_TAG_namespace
:
11697 return "DW_TAG_namespace";
11698 case DW_TAG_imported_module
:
11699 return "DW_TAG_imported_module";
11700 case DW_TAG_unspecified_type
:
11701 return "DW_TAG_unspecified_type";
11702 case DW_TAG_partial_unit
:
11703 return "DW_TAG_partial_unit";
11704 case DW_TAG_imported_unit
:
11705 return "DW_TAG_imported_unit";
11706 case DW_TAG_condition
:
11707 return "DW_TAG_condition";
11708 case DW_TAG_shared_type
:
11709 return "DW_TAG_shared_type";
11710 case DW_TAG_type_unit
:
11711 return "DW_TAG_type_unit";
11712 case DW_TAG_MIPS_loop
:
11713 return "DW_TAG_MIPS_loop";
11714 case DW_TAG_HP_array_descriptor
:
11715 return "DW_TAG_HP_array_descriptor";
11716 case DW_TAG_format_label
:
11717 return "DW_TAG_format_label";
11718 case DW_TAG_function_template
:
11719 return "DW_TAG_function_template";
11720 case DW_TAG_class_template
:
11721 return "DW_TAG_class_template";
11722 case DW_TAG_GNU_BINCL
:
11723 return "DW_TAG_GNU_BINCL";
11724 case DW_TAG_GNU_EINCL
:
11725 return "DW_TAG_GNU_EINCL";
11726 case DW_TAG_upc_shared_type
:
11727 return "DW_TAG_upc_shared_type";
11728 case DW_TAG_upc_strict_type
:
11729 return "DW_TAG_upc_strict_type";
11730 case DW_TAG_upc_relaxed_type
:
11731 return "DW_TAG_upc_relaxed_type";
11732 case DW_TAG_PGI_kanji_type
:
11733 return "DW_TAG_PGI_kanji_type";
11734 case DW_TAG_PGI_interface_block
:
11735 return "DW_TAG_PGI_interface_block";
11737 return "DW_TAG_<unknown>";
11741 /* Convert a DWARF attribute code into its string name. */
11744 dwarf_attr_name (unsigned attr
)
11748 case DW_AT_sibling
:
11749 return "DW_AT_sibling";
11750 case DW_AT_location
:
11751 return "DW_AT_location";
11753 return "DW_AT_name";
11754 case DW_AT_ordering
:
11755 return "DW_AT_ordering";
11756 case DW_AT_subscr_data
:
11757 return "DW_AT_subscr_data";
11758 case DW_AT_byte_size
:
11759 return "DW_AT_byte_size";
11760 case DW_AT_bit_offset
:
11761 return "DW_AT_bit_offset";
11762 case DW_AT_bit_size
:
11763 return "DW_AT_bit_size";
11764 case DW_AT_element_list
:
11765 return "DW_AT_element_list";
11766 case DW_AT_stmt_list
:
11767 return "DW_AT_stmt_list";
11769 return "DW_AT_low_pc";
11770 case DW_AT_high_pc
:
11771 return "DW_AT_high_pc";
11772 case DW_AT_language
:
11773 return "DW_AT_language";
11775 return "DW_AT_member";
11777 return "DW_AT_discr";
11778 case DW_AT_discr_value
:
11779 return "DW_AT_discr_value";
11780 case DW_AT_visibility
:
11781 return "DW_AT_visibility";
11783 return "DW_AT_import";
11784 case DW_AT_string_length
:
11785 return "DW_AT_string_length";
11786 case DW_AT_common_reference
:
11787 return "DW_AT_common_reference";
11788 case DW_AT_comp_dir
:
11789 return "DW_AT_comp_dir";
11790 case DW_AT_const_value
:
11791 return "DW_AT_const_value";
11792 case DW_AT_containing_type
:
11793 return "DW_AT_containing_type";
11794 case DW_AT_default_value
:
11795 return "DW_AT_default_value";
11797 return "DW_AT_inline";
11798 case DW_AT_is_optional
:
11799 return "DW_AT_is_optional";
11800 case DW_AT_lower_bound
:
11801 return "DW_AT_lower_bound";
11802 case DW_AT_producer
:
11803 return "DW_AT_producer";
11804 case DW_AT_prototyped
:
11805 return "DW_AT_prototyped";
11806 case DW_AT_return_addr
:
11807 return "DW_AT_return_addr";
11808 case DW_AT_start_scope
:
11809 return "DW_AT_start_scope";
11810 case DW_AT_bit_stride
:
11811 return "DW_AT_bit_stride";
11812 case DW_AT_upper_bound
:
11813 return "DW_AT_upper_bound";
11814 case DW_AT_abstract_origin
:
11815 return "DW_AT_abstract_origin";
11816 case DW_AT_accessibility
:
11817 return "DW_AT_accessibility";
11818 case DW_AT_address_class
:
11819 return "DW_AT_address_class";
11820 case DW_AT_artificial
:
11821 return "DW_AT_artificial";
11822 case DW_AT_base_types
:
11823 return "DW_AT_base_types";
11824 case DW_AT_calling_convention
:
11825 return "DW_AT_calling_convention";
11827 return "DW_AT_count";
11828 case DW_AT_data_member_location
:
11829 return "DW_AT_data_member_location";
11830 case DW_AT_decl_column
:
11831 return "DW_AT_decl_column";
11832 case DW_AT_decl_file
:
11833 return "DW_AT_decl_file";
11834 case DW_AT_decl_line
:
11835 return "DW_AT_decl_line";
11836 case DW_AT_declaration
:
11837 return "DW_AT_declaration";
11838 case DW_AT_discr_list
:
11839 return "DW_AT_discr_list";
11840 case DW_AT_encoding
:
11841 return "DW_AT_encoding";
11842 case DW_AT_external
:
11843 return "DW_AT_external";
11844 case DW_AT_frame_base
:
11845 return "DW_AT_frame_base";
11847 return "DW_AT_friend";
11848 case DW_AT_identifier_case
:
11849 return "DW_AT_identifier_case";
11850 case DW_AT_macro_info
:
11851 return "DW_AT_macro_info";
11852 case DW_AT_namelist_items
:
11853 return "DW_AT_namelist_items";
11854 case DW_AT_priority
:
11855 return "DW_AT_priority";
11856 case DW_AT_segment
:
11857 return "DW_AT_segment";
11858 case DW_AT_specification
:
11859 return "DW_AT_specification";
11860 case DW_AT_static_link
:
11861 return "DW_AT_static_link";
11863 return "DW_AT_type";
11864 case DW_AT_use_location
:
11865 return "DW_AT_use_location";
11866 case DW_AT_variable_parameter
:
11867 return "DW_AT_variable_parameter";
11868 case DW_AT_virtuality
:
11869 return "DW_AT_virtuality";
11870 case DW_AT_vtable_elem_location
:
11871 return "DW_AT_vtable_elem_location";
11872 /* DWARF 3 values. */
11873 case DW_AT_allocated
:
11874 return "DW_AT_allocated";
11875 case DW_AT_associated
:
11876 return "DW_AT_associated";
11877 case DW_AT_data_location
:
11878 return "DW_AT_data_location";
11879 case DW_AT_byte_stride
:
11880 return "DW_AT_byte_stride";
11881 case DW_AT_entry_pc
:
11882 return "DW_AT_entry_pc";
11883 case DW_AT_use_UTF8
:
11884 return "DW_AT_use_UTF8";
11885 case DW_AT_extension
:
11886 return "DW_AT_extension";
11888 return "DW_AT_ranges";
11889 case DW_AT_trampoline
:
11890 return "DW_AT_trampoline";
11891 case DW_AT_call_column
:
11892 return "DW_AT_call_column";
11893 case DW_AT_call_file
:
11894 return "DW_AT_call_file";
11895 case DW_AT_call_line
:
11896 return "DW_AT_call_line";
11897 case DW_AT_description
:
11898 return "DW_AT_description";
11899 case DW_AT_binary_scale
:
11900 return "DW_AT_binary_scale";
11901 case DW_AT_decimal_scale
:
11902 return "DW_AT_decimal_scale";
11904 return "DW_AT_small";
11905 case DW_AT_decimal_sign
:
11906 return "DW_AT_decimal_sign";
11907 case DW_AT_digit_count
:
11908 return "DW_AT_digit_count";
11909 case DW_AT_picture_string
:
11910 return "DW_AT_picture_string";
11911 case DW_AT_mutable
:
11912 return "DW_AT_mutable";
11913 case DW_AT_threads_scaled
:
11914 return "DW_AT_threads_scaled";
11915 case DW_AT_explicit
:
11916 return "DW_AT_explicit";
11917 case DW_AT_object_pointer
:
11918 return "DW_AT_object_pointer";
11919 case DW_AT_endianity
:
11920 return "DW_AT_endianity";
11921 case DW_AT_elemental
:
11922 return "DW_AT_elemental";
11924 return "DW_AT_pure";
11925 case DW_AT_recursive
:
11926 return "DW_AT_recursive";
11927 /* DWARF 4 values. */
11928 case DW_AT_signature
:
11929 return "DW_AT_signature";
11930 case DW_AT_linkage_name
:
11931 return "DW_AT_linkage_name";
11932 /* SGI/MIPS extensions. */
11933 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11934 case DW_AT_MIPS_fde
:
11935 return "DW_AT_MIPS_fde";
11937 case DW_AT_MIPS_loop_begin
:
11938 return "DW_AT_MIPS_loop_begin";
11939 case DW_AT_MIPS_tail_loop_begin
:
11940 return "DW_AT_MIPS_tail_loop_begin";
11941 case DW_AT_MIPS_epilog_begin
:
11942 return "DW_AT_MIPS_epilog_begin";
11943 case DW_AT_MIPS_loop_unroll_factor
:
11944 return "DW_AT_MIPS_loop_unroll_factor";
11945 case DW_AT_MIPS_software_pipeline_depth
:
11946 return "DW_AT_MIPS_software_pipeline_depth";
11947 case DW_AT_MIPS_linkage_name
:
11948 return "DW_AT_MIPS_linkage_name";
11949 case DW_AT_MIPS_stride
:
11950 return "DW_AT_MIPS_stride";
11951 case DW_AT_MIPS_abstract_name
:
11952 return "DW_AT_MIPS_abstract_name";
11953 case DW_AT_MIPS_clone_origin
:
11954 return "DW_AT_MIPS_clone_origin";
11955 case DW_AT_MIPS_has_inlines
:
11956 return "DW_AT_MIPS_has_inlines";
11957 /* HP extensions. */
11958 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11959 case DW_AT_HP_block_index
:
11960 return "DW_AT_HP_block_index";
11962 case DW_AT_HP_unmodifiable
:
11963 return "DW_AT_HP_unmodifiable";
11964 case DW_AT_HP_actuals_stmt_list
:
11965 return "DW_AT_HP_actuals_stmt_list";
11966 case DW_AT_HP_proc_per_section
:
11967 return "DW_AT_HP_proc_per_section";
11968 case DW_AT_HP_raw_data_ptr
:
11969 return "DW_AT_HP_raw_data_ptr";
11970 case DW_AT_HP_pass_by_reference
:
11971 return "DW_AT_HP_pass_by_reference";
11972 case DW_AT_HP_opt_level
:
11973 return "DW_AT_HP_opt_level";
11974 case DW_AT_HP_prof_version_id
:
11975 return "DW_AT_HP_prof_version_id";
11976 case DW_AT_HP_opt_flags
:
11977 return "DW_AT_HP_opt_flags";
11978 case DW_AT_HP_cold_region_low_pc
:
11979 return "DW_AT_HP_cold_region_low_pc";
11980 case DW_AT_HP_cold_region_high_pc
:
11981 return "DW_AT_HP_cold_region_high_pc";
11982 case DW_AT_HP_all_variables_modifiable
:
11983 return "DW_AT_HP_all_variables_modifiable";
11984 case DW_AT_HP_linkage_name
:
11985 return "DW_AT_HP_linkage_name";
11986 case DW_AT_HP_prof_flags
:
11987 return "DW_AT_HP_prof_flags";
11988 /* GNU extensions. */
11989 case DW_AT_sf_names
:
11990 return "DW_AT_sf_names";
11991 case DW_AT_src_info
:
11992 return "DW_AT_src_info";
11993 case DW_AT_mac_info
:
11994 return "DW_AT_mac_info";
11995 case DW_AT_src_coords
:
11996 return "DW_AT_src_coords";
11997 case DW_AT_body_begin
:
11998 return "DW_AT_body_begin";
11999 case DW_AT_body_end
:
12000 return "DW_AT_body_end";
12001 case DW_AT_GNU_vector
:
12002 return "DW_AT_GNU_vector";
12003 case DW_AT_GNU_odr_signature
:
12004 return "DW_AT_GNU_odr_signature";
12005 /* VMS extensions. */
12006 case DW_AT_VMS_rtnbeg_pd_address
:
12007 return "DW_AT_VMS_rtnbeg_pd_address";
12008 /* UPC extension. */
12009 case DW_AT_upc_threads_scaled
:
12010 return "DW_AT_upc_threads_scaled";
12011 /* PGI (STMicroelectronics) extensions. */
12012 case DW_AT_PGI_lbase
:
12013 return "DW_AT_PGI_lbase";
12014 case DW_AT_PGI_soffset
:
12015 return "DW_AT_PGI_soffset";
12016 case DW_AT_PGI_lstride
:
12017 return "DW_AT_PGI_lstride";
12019 return "DW_AT_<unknown>";
12023 /* Convert a DWARF value form code into its string name. */
12026 dwarf_form_name (unsigned form
)
12031 return "DW_FORM_addr";
12032 case DW_FORM_block2
:
12033 return "DW_FORM_block2";
12034 case DW_FORM_block4
:
12035 return "DW_FORM_block4";
12036 case DW_FORM_data2
:
12037 return "DW_FORM_data2";
12038 case DW_FORM_data4
:
12039 return "DW_FORM_data4";
12040 case DW_FORM_data8
:
12041 return "DW_FORM_data8";
12042 case DW_FORM_string
:
12043 return "DW_FORM_string";
12044 case DW_FORM_block
:
12045 return "DW_FORM_block";
12046 case DW_FORM_block1
:
12047 return "DW_FORM_block1";
12048 case DW_FORM_data1
:
12049 return "DW_FORM_data1";
12051 return "DW_FORM_flag";
12052 case DW_FORM_sdata
:
12053 return "DW_FORM_sdata";
12055 return "DW_FORM_strp";
12056 case DW_FORM_udata
:
12057 return "DW_FORM_udata";
12058 case DW_FORM_ref_addr
:
12059 return "DW_FORM_ref_addr";
12061 return "DW_FORM_ref1";
12063 return "DW_FORM_ref2";
12065 return "DW_FORM_ref4";
12067 return "DW_FORM_ref8";
12068 case DW_FORM_ref_udata
:
12069 return "DW_FORM_ref_udata";
12070 case DW_FORM_indirect
:
12071 return "DW_FORM_indirect";
12072 case DW_FORM_sec_offset
:
12073 return "DW_FORM_sec_offset";
12074 case DW_FORM_exprloc
:
12075 return "DW_FORM_exprloc";
12076 case DW_FORM_flag_present
:
12077 return "DW_FORM_flag_present";
12079 return "DW_FORM_sig8";
12081 return "DW_FORM_<unknown>";
12085 /* Convert a DWARF stack opcode into its string name. */
12088 dwarf_stack_op_name (unsigned op
, int def
)
12093 return "DW_OP_addr";
12095 return "DW_OP_deref";
12096 case DW_OP_const1u
:
12097 return "DW_OP_const1u";
12098 case DW_OP_const1s
:
12099 return "DW_OP_const1s";
12100 case DW_OP_const2u
:
12101 return "DW_OP_const2u";
12102 case DW_OP_const2s
:
12103 return "DW_OP_const2s";
12104 case DW_OP_const4u
:
12105 return "DW_OP_const4u";
12106 case DW_OP_const4s
:
12107 return "DW_OP_const4s";
12108 case DW_OP_const8u
:
12109 return "DW_OP_const8u";
12110 case DW_OP_const8s
:
12111 return "DW_OP_const8s";
12113 return "DW_OP_constu";
12115 return "DW_OP_consts";
12117 return "DW_OP_dup";
12119 return "DW_OP_drop";
12121 return "DW_OP_over";
12123 return "DW_OP_pick";
12125 return "DW_OP_swap";
12127 return "DW_OP_rot";
12129 return "DW_OP_xderef";
12131 return "DW_OP_abs";
12133 return "DW_OP_and";
12135 return "DW_OP_div";
12137 return "DW_OP_minus";
12139 return "DW_OP_mod";
12141 return "DW_OP_mul";
12143 return "DW_OP_neg";
12145 return "DW_OP_not";
12149 return "DW_OP_plus";
12150 case DW_OP_plus_uconst
:
12151 return "DW_OP_plus_uconst";
12153 return "DW_OP_shl";
12155 return "DW_OP_shr";
12157 return "DW_OP_shra";
12159 return "DW_OP_xor";
12161 return "DW_OP_bra";
12175 return "DW_OP_skip";
12177 return "DW_OP_lit0";
12179 return "DW_OP_lit1";
12181 return "DW_OP_lit2";
12183 return "DW_OP_lit3";
12185 return "DW_OP_lit4";
12187 return "DW_OP_lit5";
12189 return "DW_OP_lit6";
12191 return "DW_OP_lit7";
12193 return "DW_OP_lit8";
12195 return "DW_OP_lit9";
12197 return "DW_OP_lit10";
12199 return "DW_OP_lit11";
12201 return "DW_OP_lit12";
12203 return "DW_OP_lit13";
12205 return "DW_OP_lit14";
12207 return "DW_OP_lit15";
12209 return "DW_OP_lit16";
12211 return "DW_OP_lit17";
12213 return "DW_OP_lit18";
12215 return "DW_OP_lit19";
12217 return "DW_OP_lit20";
12219 return "DW_OP_lit21";
12221 return "DW_OP_lit22";
12223 return "DW_OP_lit23";
12225 return "DW_OP_lit24";
12227 return "DW_OP_lit25";
12229 return "DW_OP_lit26";
12231 return "DW_OP_lit27";
12233 return "DW_OP_lit28";
12235 return "DW_OP_lit29";
12237 return "DW_OP_lit30";
12239 return "DW_OP_lit31";
12241 return "DW_OP_reg0";
12243 return "DW_OP_reg1";
12245 return "DW_OP_reg2";
12247 return "DW_OP_reg3";
12249 return "DW_OP_reg4";
12251 return "DW_OP_reg5";
12253 return "DW_OP_reg6";
12255 return "DW_OP_reg7";
12257 return "DW_OP_reg8";
12259 return "DW_OP_reg9";
12261 return "DW_OP_reg10";
12263 return "DW_OP_reg11";
12265 return "DW_OP_reg12";
12267 return "DW_OP_reg13";
12269 return "DW_OP_reg14";
12271 return "DW_OP_reg15";
12273 return "DW_OP_reg16";
12275 return "DW_OP_reg17";
12277 return "DW_OP_reg18";
12279 return "DW_OP_reg19";
12281 return "DW_OP_reg20";
12283 return "DW_OP_reg21";
12285 return "DW_OP_reg22";
12287 return "DW_OP_reg23";
12289 return "DW_OP_reg24";
12291 return "DW_OP_reg25";
12293 return "DW_OP_reg26";
12295 return "DW_OP_reg27";
12297 return "DW_OP_reg28";
12299 return "DW_OP_reg29";
12301 return "DW_OP_reg30";
12303 return "DW_OP_reg31";
12305 return "DW_OP_breg0";
12307 return "DW_OP_breg1";
12309 return "DW_OP_breg2";
12311 return "DW_OP_breg3";
12313 return "DW_OP_breg4";
12315 return "DW_OP_breg5";
12317 return "DW_OP_breg6";
12319 return "DW_OP_breg7";
12321 return "DW_OP_breg8";
12323 return "DW_OP_breg9";
12325 return "DW_OP_breg10";
12327 return "DW_OP_breg11";
12329 return "DW_OP_breg12";
12331 return "DW_OP_breg13";
12333 return "DW_OP_breg14";
12335 return "DW_OP_breg15";
12337 return "DW_OP_breg16";
12339 return "DW_OP_breg17";
12341 return "DW_OP_breg18";
12343 return "DW_OP_breg19";
12345 return "DW_OP_breg20";
12347 return "DW_OP_breg21";
12349 return "DW_OP_breg22";
12351 return "DW_OP_breg23";
12353 return "DW_OP_breg24";
12355 return "DW_OP_breg25";
12357 return "DW_OP_breg26";
12359 return "DW_OP_breg27";
12361 return "DW_OP_breg28";
12363 return "DW_OP_breg29";
12365 return "DW_OP_breg30";
12367 return "DW_OP_breg31";
12369 return "DW_OP_regx";
12371 return "DW_OP_fbreg";
12373 return "DW_OP_bregx";
12375 return "DW_OP_piece";
12376 case DW_OP_deref_size
:
12377 return "DW_OP_deref_size";
12378 case DW_OP_xderef_size
:
12379 return "DW_OP_xderef_size";
12381 return "DW_OP_nop";
12382 /* DWARF 3 extensions. */
12383 case DW_OP_push_object_address
:
12384 return "DW_OP_push_object_address";
12386 return "DW_OP_call2";
12388 return "DW_OP_call4";
12389 case DW_OP_call_ref
:
12390 return "DW_OP_call_ref";
12391 case DW_OP_form_tls_address
:
12392 return "DW_OP_form_tls_address";
12393 case DW_OP_call_frame_cfa
:
12394 return "DW_OP_call_frame_cfa";
12395 case DW_OP_bit_piece
:
12396 return "DW_OP_bit_piece";
12397 /* DWARF 4 extensions. */
12398 case DW_OP_implicit_value
:
12399 return "DW_OP_implicit_value";
12400 case DW_OP_stack_value
:
12401 return "DW_OP_stack_value";
12402 /* GNU extensions. */
12403 case DW_OP_GNU_push_tls_address
:
12404 return "DW_OP_GNU_push_tls_address";
12405 case DW_OP_GNU_uninit
:
12406 return "DW_OP_GNU_uninit";
12408 return def
? "OP_<unknown>" : NULL
;
12413 dwarf_bool_name (unsigned mybool
)
12421 /* Convert a DWARF type code into its string name. */
12424 dwarf_type_encoding_name (unsigned enc
)
12429 return "DW_ATE_void";
12430 case DW_ATE_address
:
12431 return "DW_ATE_address";
12432 case DW_ATE_boolean
:
12433 return "DW_ATE_boolean";
12434 case DW_ATE_complex_float
:
12435 return "DW_ATE_complex_float";
12437 return "DW_ATE_float";
12438 case DW_ATE_signed
:
12439 return "DW_ATE_signed";
12440 case DW_ATE_signed_char
:
12441 return "DW_ATE_signed_char";
12442 case DW_ATE_unsigned
:
12443 return "DW_ATE_unsigned";
12444 case DW_ATE_unsigned_char
:
12445 return "DW_ATE_unsigned_char";
12447 case DW_ATE_imaginary_float
:
12448 return "DW_ATE_imaginary_float";
12449 case DW_ATE_packed_decimal
:
12450 return "DW_ATE_packed_decimal";
12451 case DW_ATE_numeric_string
:
12452 return "DW_ATE_numeric_string";
12453 case DW_ATE_edited
:
12454 return "DW_ATE_edited";
12455 case DW_ATE_signed_fixed
:
12456 return "DW_ATE_signed_fixed";
12457 case DW_ATE_unsigned_fixed
:
12458 return "DW_ATE_unsigned_fixed";
12459 case DW_ATE_decimal_float
:
12460 return "DW_ATE_decimal_float";
12463 return "DW_ATE_UTF";
12464 /* HP extensions. */
12465 case DW_ATE_HP_float80
:
12466 return "DW_ATE_HP_float80";
12467 case DW_ATE_HP_complex_float80
:
12468 return "DW_ATE_HP_complex_float80";
12469 case DW_ATE_HP_float128
:
12470 return "DW_ATE_HP_float128";
12471 case DW_ATE_HP_complex_float128
:
12472 return "DW_ATE_HP_complex_float128";
12473 case DW_ATE_HP_floathpintel
:
12474 return "DW_ATE_HP_floathpintel";
12475 case DW_ATE_HP_imaginary_float80
:
12476 return "DW_ATE_HP_imaginary_float80";
12477 case DW_ATE_HP_imaginary_float128
:
12478 return "DW_ATE_HP_imaginary_float128";
12480 return "DW_ATE_<unknown>";
12484 /* Convert a DWARF call frame info operation to its string name. */
12488 dwarf_cfi_name (unsigned cfi_opc
)
12492 case DW_CFA_advance_loc
:
12493 return "DW_CFA_advance_loc";
12494 case DW_CFA_offset
:
12495 return "DW_CFA_offset";
12496 case DW_CFA_restore
:
12497 return "DW_CFA_restore";
12499 return "DW_CFA_nop";
12500 case DW_CFA_set_loc
:
12501 return "DW_CFA_set_loc";
12502 case DW_CFA_advance_loc1
:
12503 return "DW_CFA_advance_loc1";
12504 case DW_CFA_advance_loc2
:
12505 return "DW_CFA_advance_loc2";
12506 case DW_CFA_advance_loc4
:
12507 return "DW_CFA_advance_loc4";
12508 case DW_CFA_offset_extended
:
12509 return "DW_CFA_offset_extended";
12510 case DW_CFA_restore_extended
:
12511 return "DW_CFA_restore_extended";
12512 case DW_CFA_undefined
:
12513 return "DW_CFA_undefined";
12514 case DW_CFA_same_value
:
12515 return "DW_CFA_same_value";
12516 case DW_CFA_register
:
12517 return "DW_CFA_register";
12518 case DW_CFA_remember_state
:
12519 return "DW_CFA_remember_state";
12520 case DW_CFA_restore_state
:
12521 return "DW_CFA_restore_state";
12522 case DW_CFA_def_cfa
:
12523 return "DW_CFA_def_cfa";
12524 case DW_CFA_def_cfa_register
:
12525 return "DW_CFA_def_cfa_register";
12526 case DW_CFA_def_cfa_offset
:
12527 return "DW_CFA_def_cfa_offset";
12529 case DW_CFA_def_cfa_expression
:
12530 return "DW_CFA_def_cfa_expression";
12531 case DW_CFA_expression
:
12532 return "DW_CFA_expression";
12533 case DW_CFA_offset_extended_sf
:
12534 return "DW_CFA_offset_extended_sf";
12535 case DW_CFA_def_cfa_sf
:
12536 return "DW_CFA_def_cfa_sf";
12537 case DW_CFA_def_cfa_offset_sf
:
12538 return "DW_CFA_def_cfa_offset_sf";
12539 case DW_CFA_val_offset
:
12540 return "DW_CFA_val_offset";
12541 case DW_CFA_val_offset_sf
:
12542 return "DW_CFA_val_offset_sf";
12543 case DW_CFA_val_expression
:
12544 return "DW_CFA_val_expression";
12545 /* SGI/MIPS specific. */
12546 case DW_CFA_MIPS_advance_loc8
:
12547 return "DW_CFA_MIPS_advance_loc8";
12548 /* GNU extensions. */
12549 case DW_CFA_GNU_window_save
:
12550 return "DW_CFA_GNU_window_save";
12551 case DW_CFA_GNU_args_size
:
12552 return "DW_CFA_GNU_args_size";
12553 case DW_CFA_GNU_negative_offset_extended
:
12554 return "DW_CFA_GNU_negative_offset_extended";
12556 return "DW_CFA_<unknown>";
12562 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12566 print_spaces (indent
, f
);
12567 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12568 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12570 if (die
->parent
!= NULL
)
12572 print_spaces (indent
, f
);
12573 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12574 die
->parent
->offset
);
12577 print_spaces (indent
, f
);
12578 fprintf_unfiltered (f
, " has children: %s\n",
12579 dwarf_bool_name (die
->child
!= NULL
));
12581 print_spaces (indent
, f
);
12582 fprintf_unfiltered (f
, " attributes:\n");
12584 for (i
= 0; i
< die
->num_attrs
; ++i
)
12586 print_spaces (indent
, f
);
12587 fprintf_unfiltered (f
, " %s (%s) ",
12588 dwarf_attr_name (die
->attrs
[i
].name
),
12589 dwarf_form_name (die
->attrs
[i
].form
));
12591 switch (die
->attrs
[i
].form
)
12593 case DW_FORM_ref_addr
:
12595 fprintf_unfiltered (f
, "address: ");
12596 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12598 case DW_FORM_block2
:
12599 case DW_FORM_block4
:
12600 case DW_FORM_block
:
12601 case DW_FORM_block1
:
12602 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
12604 case DW_FORM_exprloc
:
12605 fprintf_unfiltered (f
, "expression: size %u",
12606 DW_BLOCK (&die
->attrs
[i
])->size
);
12611 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12612 (long) (DW_ADDR (&die
->attrs
[i
])));
12614 case DW_FORM_data1
:
12615 case DW_FORM_data2
:
12616 case DW_FORM_data4
:
12617 case DW_FORM_data8
:
12618 case DW_FORM_udata
:
12619 case DW_FORM_sdata
:
12620 fprintf_unfiltered (f
, "constant: %s",
12621 pulongest (DW_UNSND (&die
->attrs
[i
])));
12623 case DW_FORM_sec_offset
:
12624 fprintf_unfiltered (f
, "section offset: %s",
12625 pulongest (DW_UNSND (&die
->attrs
[i
])));
12628 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12629 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12630 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12632 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12634 case DW_FORM_string
:
12636 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12637 DW_STRING (&die
->attrs
[i
])
12638 ? DW_STRING (&die
->attrs
[i
]) : "",
12639 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
12642 if (DW_UNSND (&die
->attrs
[i
]))
12643 fprintf_unfiltered (f
, "flag: TRUE");
12645 fprintf_unfiltered (f
, "flag: FALSE");
12647 case DW_FORM_flag_present
:
12648 fprintf_unfiltered (f
, "flag: TRUE");
12650 case DW_FORM_indirect
:
12651 /* the reader will have reduced the indirect form to
12652 the "base form" so this form should not occur */
12653 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
12656 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
12657 die
->attrs
[i
].form
);
12660 fprintf_unfiltered (f
, "\n");
12665 dump_die_for_error (struct die_info
*die
)
12667 dump_die_shallow (gdb_stderr
, 0, die
);
12671 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
12673 int indent
= level
* 4;
12675 gdb_assert (die
!= NULL
);
12677 if (level
>= max_level
)
12680 dump_die_shallow (f
, indent
, die
);
12682 if (die
->child
!= NULL
)
12684 print_spaces (indent
, f
);
12685 fprintf_unfiltered (f
, " Children:");
12686 if (level
+ 1 < max_level
)
12688 fprintf_unfiltered (f
, "\n");
12689 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
12693 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
12697 if (die
->sibling
!= NULL
&& level
> 0)
12699 dump_die_1 (f
, level
, max_level
, die
->sibling
);
12703 /* This is called from the pdie macro in gdbinit.in.
12704 It's not static so gcc will keep a copy callable from gdb. */
12707 dump_die (struct die_info
*die
, int max_level
)
12709 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
12713 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
12717 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
12723 is_ref_attr (struct attribute
*attr
)
12725 switch (attr
->form
)
12727 case DW_FORM_ref_addr
:
12732 case DW_FORM_ref_udata
:
12739 static unsigned int
12740 dwarf2_get_ref_die_offset (struct attribute
*attr
)
12742 if (is_ref_attr (attr
))
12743 return DW_ADDR (attr
);
12745 complaint (&symfile_complaints
,
12746 _("unsupported die ref attribute form: '%s'"),
12747 dwarf_form_name (attr
->form
));
12751 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12752 * the value held by the attribute is not constant. */
12755 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
12757 if (attr
->form
== DW_FORM_sdata
)
12758 return DW_SND (attr
);
12759 else if (attr
->form
== DW_FORM_udata
12760 || attr
->form
== DW_FORM_data1
12761 || attr
->form
== DW_FORM_data2
12762 || attr
->form
== DW_FORM_data4
12763 || attr
->form
== DW_FORM_data8
)
12764 return DW_UNSND (attr
);
12767 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
12768 dwarf_form_name (attr
->form
));
12769 return default_value
;
12773 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12774 unit and add it to our queue.
12775 The result is non-zero if PER_CU was queued, otherwise the result is zero
12776 meaning either PER_CU is already queued or it is already loaded. */
12779 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
12780 struct dwarf2_per_cu_data
*per_cu
)
12782 /* We may arrive here during partial symbol reading, if we need full
12783 DIEs to process an unusual case (e.g. template arguments). Do
12784 not queue PER_CU, just tell our caller to load its DIEs. */
12785 if (dwarf2_per_objfile
->reading_partial_symbols
)
12787 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
12792 /* Mark the dependence relation so that we don't flush PER_CU
12794 dwarf2_add_dependence (this_cu
, per_cu
);
12796 /* If it's already on the queue, we have nothing to do. */
12797 if (per_cu
->queued
)
12800 /* If the compilation unit is already loaded, just mark it as
12802 if (per_cu
->cu
!= NULL
)
12804 per_cu
->cu
->last_used
= 0;
12808 /* Add it to the queue. */
12809 queue_comp_unit (per_cu
, this_cu
->objfile
);
12814 /* Follow reference or signature attribute ATTR of SRC_DIE.
12815 On entry *REF_CU is the CU of SRC_DIE.
12816 On exit *REF_CU is the CU of the result. */
12818 static struct die_info
*
12819 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
12820 struct dwarf2_cu
**ref_cu
)
12822 struct die_info
*die
;
12824 if (is_ref_attr (attr
))
12825 die
= follow_die_ref (src_die
, attr
, ref_cu
);
12826 else if (attr
->form
== DW_FORM_sig8
)
12827 die
= follow_die_sig (src_die
, attr
, ref_cu
);
12830 dump_die_for_error (src_die
);
12831 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12832 (*ref_cu
)->objfile
->name
);
12838 /* Follow reference OFFSET.
12839 On entry *REF_CU is the CU of the source die referencing OFFSET.
12840 On exit *REF_CU is the CU of the result.
12841 Returns NULL if OFFSET is invalid. */
12843 static struct die_info
*
12844 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
12846 struct die_info temp_die
;
12847 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
12849 gdb_assert (cu
->per_cu
!= NULL
);
12853 if (cu
->per_cu
->from_debug_types
)
12855 /* .debug_types CUs cannot reference anything outside their CU.
12856 If they need to, they have to reference a signatured type via
12858 if (! offset_in_cu_p (&cu
->header
, offset
))
12861 else if (! offset_in_cu_p (&cu
->header
, offset
))
12863 struct dwarf2_per_cu_data
*per_cu
;
12865 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
12867 /* If necessary, add it to the queue and load its DIEs. */
12868 if (maybe_queue_comp_unit (cu
, per_cu
))
12869 load_full_comp_unit (per_cu
, cu
->objfile
);
12871 target_cu
= per_cu
->cu
;
12873 else if (cu
->dies
== NULL
)
12875 /* We're loading full DIEs during partial symbol reading. */
12876 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
12877 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
12880 *ref_cu
= target_cu
;
12881 temp_die
.offset
= offset
;
12882 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
12885 /* Follow reference attribute ATTR of SRC_DIE.
12886 On entry *REF_CU is the CU of SRC_DIE.
12887 On exit *REF_CU is the CU of the result. */
12889 static struct die_info
*
12890 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
12891 struct dwarf2_cu
**ref_cu
)
12893 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
12894 struct dwarf2_cu
*cu
= *ref_cu
;
12895 struct die_info
*die
;
12897 die
= follow_die_offset (offset
, ref_cu
);
12899 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12900 "at 0x%x [in module %s]"),
12901 offset
, src_die
->offset
, cu
->objfile
->name
);
12906 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12907 value is intended for DW_OP_call*. */
12909 struct dwarf2_locexpr_baton
12910 dwarf2_fetch_die_location_block (unsigned int offset
,
12911 struct dwarf2_per_cu_data
*per_cu
)
12913 struct dwarf2_cu
*cu
= per_cu
->cu
;
12914 struct die_info
*die
;
12915 struct attribute
*attr
;
12916 struct dwarf2_locexpr_baton retval
;
12918 die
= follow_die_offset (offset
, &cu
);
12920 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12921 offset
, per_cu
->cu
->objfile
->name
);
12923 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
12926 /* DWARF: "If there is no such attribute, then there is no effect.". */
12928 retval
.data
= NULL
;
12933 if (!attr_form_is_block (attr
))
12934 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12935 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12936 offset
, per_cu
->cu
->objfile
->name
);
12938 retval
.data
= DW_BLOCK (attr
)->data
;
12939 retval
.size
= DW_BLOCK (attr
)->size
;
12941 retval
.per_cu
= cu
->per_cu
;
12945 /* Follow the signature attribute ATTR in SRC_DIE.
12946 On entry *REF_CU is the CU of SRC_DIE.
12947 On exit *REF_CU is the CU of the result. */
12949 static struct die_info
*
12950 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
12951 struct dwarf2_cu
**ref_cu
)
12953 struct objfile
*objfile
= (*ref_cu
)->objfile
;
12954 struct die_info temp_die
;
12955 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12956 struct dwarf2_cu
*sig_cu
;
12957 struct die_info
*die
;
12959 /* sig_type will be NULL if the signatured type is missing from
12961 if (sig_type
== NULL
)
12962 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12963 "at 0x%x [in module %s]"),
12964 src_die
->offset
, objfile
->name
);
12966 /* If necessary, add it to the queue and load its DIEs. */
12968 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
12969 read_signatured_type (objfile
, sig_type
);
12971 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
12973 sig_cu
= sig_type
->per_cu
.cu
;
12974 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
12975 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
12982 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12983 "at 0x%x [in module %s]"),
12984 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
12987 /* Given an offset of a signatured type, return its signatured_type. */
12989 static struct signatured_type
*
12990 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
12992 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
12993 unsigned int length
, initial_length_size
;
12994 unsigned int sig_offset
;
12995 struct signatured_type find_entry
, *type_sig
;
12997 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
12998 sig_offset
= (initial_length_size
13000 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
13001 + 1 /*address_size*/);
13002 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
13003 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
13005 /* This is only used to lookup previously recorded types.
13006 If we didn't find it, it's our bug. */
13007 gdb_assert (type_sig
!= NULL
);
13008 gdb_assert (offset
== type_sig
->offset
);
13013 /* Read in signatured type at OFFSET and build its CU and die(s). */
13016 read_signatured_type_at_offset (struct objfile
*objfile
,
13017 unsigned int offset
)
13019 struct signatured_type
*type_sig
;
13021 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13023 /* We have the section offset, but we need the signature to do the
13024 hash table lookup. */
13025 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13027 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13029 read_signatured_type (objfile
, type_sig
);
13031 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13034 /* Read in a signatured type and build its CU and DIEs. */
13037 read_signatured_type (struct objfile
*objfile
,
13038 struct signatured_type
*type_sig
)
13040 gdb_byte
*types_ptr
;
13041 struct die_reader_specs reader_specs
;
13042 struct dwarf2_cu
*cu
;
13043 ULONGEST signature
;
13044 struct cleanup
*back_to
, *free_cu_cleanup
;
13045 struct attribute
*attr
;
13047 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13048 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13050 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13052 cu
= xmalloc (sizeof (struct dwarf2_cu
));
13053 memset (cu
, 0, sizeof (struct dwarf2_cu
));
13054 obstack_init (&cu
->comp_unit_obstack
);
13055 cu
->objfile
= objfile
;
13056 type_sig
->per_cu
.cu
= cu
;
13057 cu
->per_cu
= &type_sig
->per_cu
;
13059 /* If an error occurs while loading, release our storage. */
13060 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13062 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13063 types_ptr
, objfile
->obfd
);
13064 gdb_assert (signature
== type_sig
->signature
);
13067 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13071 &cu
->comp_unit_obstack
,
13072 hashtab_obstack_allocate
,
13073 dummy_obstack_deallocate
);
13075 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13076 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13078 init_cu_die_reader (&reader_specs
, cu
);
13080 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13083 /* We try not to read any attributes in this function, because not
13084 all objfiles needed for references have been loaded yet, and symbol
13085 table processing isn't initialized. But we have to set the CU language,
13086 or we won't be able to build types correctly. */
13087 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
13089 set_cu_language (DW_UNSND (attr
), cu
);
13091 set_cu_language (language_minimal
, cu
);
13093 do_cleanups (back_to
);
13095 /* We've successfully allocated this compilation unit. Let our caller
13096 clean it up when finished with it. */
13097 discard_cleanups (free_cu_cleanup
);
13099 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13100 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13103 /* Decode simple location descriptions.
13104 Given a pointer to a dwarf block that defines a location, compute
13105 the location and return the value.
13107 NOTE drow/2003-11-18: This function is called in two situations
13108 now: for the address of static or global variables (partial symbols
13109 only) and for offsets into structures which are expected to be
13110 (more or less) constant. The partial symbol case should go away,
13111 and only the constant case should remain. That will let this
13112 function complain more accurately. A few special modes are allowed
13113 without complaint for global variables (for instance, global
13114 register values and thread-local values).
13116 A location description containing no operations indicates that the
13117 object is optimized out. The return value is 0 for that case.
13118 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13119 callers will only want a very basic result and this can become a
13122 Note that stack[0] is unused except as a default error return.
13123 Note that stack overflow is not yet handled. */
13126 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13128 struct objfile
*objfile
= cu
->objfile
;
13130 int size
= blk
->size
;
13131 gdb_byte
*data
= blk
->data
;
13132 CORE_ADDR stack
[64];
13134 unsigned int bytes_read
, unsnd
;
13178 stack
[++stacki
] = op
- DW_OP_lit0
;
13213 stack
[++stacki
] = op
- DW_OP_reg0
;
13215 dwarf2_complex_location_expr_complaint ();
13219 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13221 stack
[++stacki
] = unsnd
;
13223 dwarf2_complex_location_expr_complaint ();
13227 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13232 case DW_OP_const1u
:
13233 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13237 case DW_OP_const1s
:
13238 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13242 case DW_OP_const2u
:
13243 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13247 case DW_OP_const2s
:
13248 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13252 case DW_OP_const4u
:
13253 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13257 case DW_OP_const4s
:
13258 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13263 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13269 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13274 stack
[stacki
+ 1] = stack
[stacki
];
13279 stack
[stacki
- 1] += stack
[stacki
];
13283 case DW_OP_plus_uconst
:
13284 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13289 stack
[stacki
- 1] -= stack
[stacki
];
13294 /* If we're not the last op, then we definitely can't encode
13295 this using GDB's address_class enum. This is valid for partial
13296 global symbols, although the variable's address will be bogus
13299 dwarf2_complex_location_expr_complaint ();
13302 case DW_OP_GNU_push_tls_address
:
13303 /* The top of the stack has the offset from the beginning
13304 of the thread control block at which the variable is located. */
13305 /* Nothing should follow this operator, so the top of stack would
13307 /* This is valid for partial global symbols, but the variable's
13308 address will be bogus in the psymtab. */
13310 dwarf2_complex_location_expr_complaint ();
13313 case DW_OP_GNU_uninit
:
13317 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13318 dwarf_stack_op_name (op
, 1));
13319 return (stack
[stacki
]);
13322 return (stack
[stacki
]);
13325 /* memory allocation interface */
13327 static struct dwarf_block
*
13328 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13330 struct dwarf_block
*blk
;
13332 blk
= (struct dwarf_block
*)
13333 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13337 static struct abbrev_info
*
13338 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13340 struct abbrev_info
*abbrev
;
13342 abbrev
= (struct abbrev_info
*)
13343 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13344 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13348 static struct die_info
*
13349 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13351 struct die_info
*die
;
13352 size_t size
= sizeof (struct die_info
);
13355 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13357 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13358 memset (die
, 0, sizeof (struct die_info
));
13363 /* Macro support. */
13366 /* Return the full name of file number I in *LH's file name table.
13367 Use COMP_DIR as the name of the current directory of the
13368 compilation. The result is allocated using xmalloc; the caller is
13369 responsible for freeing it. */
13371 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13373 /* Is the file number a valid index into the line header's file name
13374 table? Remember that file numbers start with one, not zero. */
13375 if (1 <= file
&& file
<= lh
->num_file_names
)
13377 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13379 if (IS_ABSOLUTE_PATH (fe
->name
))
13380 return xstrdup (fe
->name
);
13388 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13394 dir_len
= strlen (dir
);
13395 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13396 strcpy (full_name
, dir
);
13397 full_name
[dir_len
] = '/';
13398 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13402 return xstrdup (fe
->name
);
13407 /* The compiler produced a bogus file number. We can at least
13408 record the macro definitions made in the file, even if we
13409 won't be able to find the file by name. */
13410 char fake_name
[80];
13412 sprintf (fake_name
, "<bad macro file number %d>", file
);
13414 complaint (&symfile_complaints
,
13415 _("bad file number in macro information (%d)"),
13418 return xstrdup (fake_name
);
13423 static struct macro_source_file
*
13424 macro_start_file (int file
, int line
,
13425 struct macro_source_file
*current_file
,
13426 const char *comp_dir
,
13427 struct line_header
*lh
, struct objfile
*objfile
)
13429 /* The full name of this source file. */
13430 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13432 /* We don't create a macro table for this compilation unit
13433 at all until we actually get a filename. */
13434 if (! pending_macros
)
13435 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13436 objfile
->macro_cache
);
13438 if (! current_file
)
13439 /* If we have no current file, then this must be the start_file
13440 directive for the compilation unit's main source file. */
13441 current_file
= macro_set_main (pending_macros
, full_name
);
13443 current_file
= macro_include (current_file
, line
, full_name
);
13447 return current_file
;
13451 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13452 followed by a null byte. */
13454 copy_string (const char *buf
, int len
)
13456 char *s
= xmalloc (len
+ 1);
13458 memcpy (s
, buf
, len
);
13464 static const char *
13465 consume_improper_spaces (const char *p
, const char *body
)
13469 complaint (&symfile_complaints
,
13470 _("macro definition contains spaces in formal argument list:\n`%s'"),
13482 parse_macro_definition (struct macro_source_file
*file
, int line
,
13487 /* The body string takes one of two forms. For object-like macro
13488 definitions, it should be:
13490 <macro name> " " <definition>
13492 For function-like macro definitions, it should be:
13494 <macro name> "() " <definition>
13496 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13498 Spaces may appear only where explicitly indicated, and in the
13501 The Dwarf 2 spec says that an object-like macro's name is always
13502 followed by a space, but versions of GCC around March 2002 omit
13503 the space when the macro's definition is the empty string.
13505 The Dwarf 2 spec says that there should be no spaces between the
13506 formal arguments in a function-like macro's formal argument list,
13507 but versions of GCC around March 2002 include spaces after the
13511 /* Find the extent of the macro name. The macro name is terminated
13512 by either a space or null character (for an object-like macro) or
13513 an opening paren (for a function-like macro). */
13514 for (p
= body
; *p
; p
++)
13515 if (*p
== ' ' || *p
== '(')
13518 if (*p
== ' ' || *p
== '\0')
13520 /* It's an object-like macro. */
13521 int name_len
= p
- body
;
13522 char *name
= copy_string (body
, name_len
);
13523 const char *replacement
;
13526 replacement
= body
+ name_len
+ 1;
13529 dwarf2_macro_malformed_definition_complaint (body
);
13530 replacement
= body
+ name_len
;
13533 macro_define_object (file
, line
, name
, replacement
);
13537 else if (*p
== '(')
13539 /* It's a function-like macro. */
13540 char *name
= copy_string (body
, p
- body
);
13543 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13547 p
= consume_improper_spaces (p
, body
);
13549 /* Parse the formal argument list. */
13550 while (*p
&& *p
!= ')')
13552 /* Find the extent of the current argument name. */
13553 const char *arg_start
= p
;
13555 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13558 if (! *p
|| p
== arg_start
)
13559 dwarf2_macro_malformed_definition_complaint (body
);
13562 /* Make sure argv has room for the new argument. */
13563 if (argc
>= argv_size
)
13566 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13569 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13572 p
= consume_improper_spaces (p
, body
);
13574 /* Consume the comma, if present. */
13579 p
= consume_improper_spaces (p
, body
);
13588 /* Perfectly formed definition, no complaints. */
13589 macro_define_function (file
, line
, name
,
13590 argc
, (const char **) argv
,
13592 else if (*p
== '\0')
13594 /* Complain, but do define it. */
13595 dwarf2_macro_malformed_definition_complaint (body
);
13596 macro_define_function (file
, line
, name
,
13597 argc
, (const char **) argv
,
13601 /* Just complain. */
13602 dwarf2_macro_malformed_definition_complaint (body
);
13605 /* Just complain. */
13606 dwarf2_macro_malformed_definition_complaint (body
);
13612 for (i
= 0; i
< argc
; i
++)
13618 dwarf2_macro_malformed_definition_complaint (body
);
13623 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
13624 char *comp_dir
, bfd
*abfd
,
13625 struct dwarf2_cu
*cu
)
13627 gdb_byte
*mac_ptr
, *mac_end
;
13628 struct macro_source_file
*current_file
= 0;
13629 enum dwarf_macinfo_record_type macinfo_type
;
13630 int at_commandline
;
13632 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13633 &dwarf2_per_objfile
->macinfo
);
13634 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
13636 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
13640 /* First pass: Find the name of the base filename.
13641 This filename is needed in order to process all macros whose definition
13642 (or undefinition) comes from the command line. These macros are defined
13643 before the first DW_MACINFO_start_file entry, and yet still need to be
13644 associated to the base file.
13646 To determine the base file name, we scan the macro definitions until we
13647 reach the first DW_MACINFO_start_file entry. We then initialize
13648 CURRENT_FILE accordingly so that any macro definition found before the
13649 first DW_MACINFO_start_file can still be associated to the base file. */
13651 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13652 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
13653 + dwarf2_per_objfile
->macinfo
.size
;
13657 /* Do we at least have room for a macinfo type byte? */
13658 if (mac_ptr
>= mac_end
)
13660 /* Complaint is printed during the second pass as GDB will probably
13661 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13665 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13668 switch (macinfo_type
)
13670 /* A zero macinfo type indicates the end of the macro
13675 case DW_MACINFO_define
:
13676 case DW_MACINFO_undef
:
13677 /* Only skip the data by MAC_PTR. */
13679 unsigned int bytes_read
;
13681 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13682 mac_ptr
+= bytes_read
;
13683 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13684 mac_ptr
+= bytes_read
;
13688 case DW_MACINFO_start_file
:
13690 unsigned int bytes_read
;
13693 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13694 mac_ptr
+= bytes_read
;
13695 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13696 mac_ptr
+= bytes_read
;
13698 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
13703 case DW_MACINFO_end_file
:
13704 /* No data to skip by MAC_PTR. */
13707 case DW_MACINFO_vendor_ext
:
13708 /* Only skip the data by MAC_PTR. */
13710 unsigned int bytes_read
;
13712 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13713 mac_ptr
+= bytes_read
;
13714 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13715 mac_ptr
+= bytes_read
;
13722 } while (macinfo_type
!= 0 && current_file
== NULL
);
13724 /* Second pass: Process all entries.
13726 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13727 command-line macro definitions/undefinitions. This flag is unset when we
13728 reach the first DW_MACINFO_start_file entry. */
13730 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13732 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13733 GDB is still reading the definitions from command line. First
13734 DW_MACINFO_start_file will need to be ignored as it was already executed
13735 to create CURRENT_FILE for the main source holding also the command line
13736 definitions. On first met DW_MACINFO_start_file this flag is reset to
13737 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13739 at_commandline
= 1;
13743 /* Do we at least have room for a macinfo type byte? */
13744 if (mac_ptr
>= mac_end
)
13746 dwarf2_macros_too_long_complaint ();
13750 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13753 switch (macinfo_type
)
13755 /* A zero macinfo type indicates the end of the macro
13760 case DW_MACINFO_define
:
13761 case DW_MACINFO_undef
:
13763 unsigned int bytes_read
;
13767 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13768 mac_ptr
+= bytes_read
;
13769 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13770 mac_ptr
+= bytes_read
;
13772 if (! current_file
)
13774 /* DWARF violation as no main source is present. */
13775 complaint (&symfile_complaints
,
13776 _("debug info with no main source gives macro %s "
13778 macinfo_type
== DW_MACINFO_define
?
13780 macinfo_type
== DW_MACINFO_undef
?
13781 _("undefinition") :
13782 _("something-or-other"), line
, body
);
13785 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13786 complaint (&symfile_complaints
,
13787 _("debug info gives %s macro %s with %s line %d: %s"),
13788 at_commandline
? _("command-line") : _("in-file"),
13789 macinfo_type
== DW_MACINFO_define
?
13791 macinfo_type
== DW_MACINFO_undef
?
13792 _("undefinition") :
13793 _("something-or-other"),
13794 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
13796 if (macinfo_type
== DW_MACINFO_define
)
13797 parse_macro_definition (current_file
, line
, body
);
13798 else if (macinfo_type
== DW_MACINFO_undef
)
13799 macro_undef (current_file
, line
, body
);
13803 case DW_MACINFO_start_file
:
13805 unsigned int bytes_read
;
13808 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13809 mac_ptr
+= bytes_read
;
13810 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13811 mac_ptr
+= bytes_read
;
13813 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13814 complaint (&symfile_complaints
,
13815 _("debug info gives source %d included "
13816 "from %s at %s line %d"),
13817 file
, at_commandline
? _("command-line") : _("file"),
13818 line
== 0 ? _("zero") : _("non-zero"), line
);
13820 if (at_commandline
)
13822 /* This DW_MACINFO_start_file was executed in the pass one. */
13823 at_commandline
= 0;
13826 current_file
= macro_start_file (file
, line
,
13827 current_file
, comp_dir
,
13832 case DW_MACINFO_end_file
:
13833 if (! current_file
)
13834 complaint (&symfile_complaints
,
13835 _("macro debug info has an unmatched `close_file' directive"));
13838 current_file
= current_file
->included_by
;
13839 if (! current_file
)
13841 enum dwarf_macinfo_record_type next_type
;
13843 /* GCC circa March 2002 doesn't produce the zero
13844 type byte marking the end of the compilation
13845 unit. Complain if it's not there, but exit no
13848 /* Do we at least have room for a macinfo type byte? */
13849 if (mac_ptr
>= mac_end
)
13851 dwarf2_macros_too_long_complaint ();
13855 /* We don't increment mac_ptr here, so this is just
13857 next_type
= read_1_byte (abfd
, mac_ptr
);
13858 if (next_type
!= 0)
13859 complaint (&symfile_complaints
,
13860 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13867 case DW_MACINFO_vendor_ext
:
13869 unsigned int bytes_read
;
13873 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13874 mac_ptr
+= bytes_read
;
13875 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13876 mac_ptr
+= bytes_read
;
13878 /* We don't recognize any vendor extensions. */
13882 } while (macinfo_type
!= 0);
13885 /* Check if the attribute's form is a DW_FORM_block*
13886 if so return true else false. */
13888 attr_form_is_block (struct attribute
*attr
)
13890 return (attr
== NULL
? 0 :
13891 attr
->form
== DW_FORM_block1
13892 || attr
->form
== DW_FORM_block2
13893 || attr
->form
== DW_FORM_block4
13894 || attr
->form
== DW_FORM_block
13895 || attr
->form
== DW_FORM_exprloc
);
13898 /* Return non-zero if ATTR's value is a section offset --- classes
13899 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13900 You may use DW_UNSND (attr) to retrieve such offsets.
13902 Section 7.5.4, "Attribute Encodings", explains that no attribute
13903 may have a value that belongs to more than one of these classes; it
13904 would be ambiguous if we did, because we use the same forms for all
13907 attr_form_is_section_offset (struct attribute
*attr
)
13909 return (attr
->form
== DW_FORM_data4
13910 || attr
->form
== DW_FORM_data8
13911 || attr
->form
== DW_FORM_sec_offset
);
13915 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13916 zero otherwise. When this function returns true, you can apply
13917 dwarf2_get_attr_constant_value to it.
13919 However, note that for some attributes you must check
13920 attr_form_is_section_offset before using this test. DW_FORM_data4
13921 and DW_FORM_data8 are members of both the constant class, and of
13922 the classes that contain offsets into other debug sections
13923 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13924 that, if an attribute's can be either a constant or one of the
13925 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13926 taken as section offsets, not constants. */
13928 attr_form_is_constant (struct attribute
*attr
)
13930 switch (attr
->form
)
13932 case DW_FORM_sdata
:
13933 case DW_FORM_udata
:
13934 case DW_FORM_data1
:
13935 case DW_FORM_data2
:
13936 case DW_FORM_data4
:
13937 case DW_FORM_data8
:
13945 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
13946 struct dwarf2_cu
*cu
)
13948 if (attr_form_is_section_offset (attr
)
13949 /* ".debug_loc" may not exist at all, or the offset may be outside
13950 the section. If so, fall through to the complaint in the
13952 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
13954 struct dwarf2_loclist_baton
*baton
;
13956 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13957 sizeof (struct dwarf2_loclist_baton
));
13958 baton
->per_cu
= cu
->per_cu
;
13959 gdb_assert (baton
->per_cu
);
13961 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13962 &dwarf2_per_objfile
->loc
);
13964 /* We don't know how long the location list is, but make sure we
13965 don't run off the edge of the section. */
13966 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
13967 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
13968 baton
->base_address
= cu
->base_address
;
13969 if (cu
->base_known
== 0)
13970 complaint (&symfile_complaints
,
13971 _("Location list used without specifying the CU base address."));
13973 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
13974 SYMBOL_LOCATION_BATON (sym
) = baton
;
13978 struct dwarf2_locexpr_baton
*baton
;
13980 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13981 sizeof (struct dwarf2_locexpr_baton
));
13982 baton
->per_cu
= cu
->per_cu
;
13983 gdb_assert (baton
->per_cu
);
13985 if (attr_form_is_block (attr
))
13987 /* Note that we're just copying the block's data pointer
13988 here, not the actual data. We're still pointing into the
13989 info_buffer for SYM's objfile; right now we never release
13990 that buffer, but when we do clean up properly this may
13992 baton
->size
= DW_BLOCK (attr
)->size
;
13993 baton
->data
= DW_BLOCK (attr
)->data
;
13997 dwarf2_invalid_attrib_class_complaint ("location description",
13998 SYMBOL_NATURAL_NAME (sym
));
14000 baton
->data
= NULL
;
14003 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
14004 SYMBOL_LOCATION_BATON (sym
) = baton
;
14008 /* Return the OBJFILE associated with the compilation unit CU. If CU
14009 came from a separate debuginfo file, then the master objfile is
14013 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
14015 struct objfile
*objfile
= per_cu
->objfile
;
14017 /* Return the master objfile, so that we can report and look up the
14018 correct file containing this variable. */
14019 if (objfile
->separate_debug_objfile_backlink
)
14020 objfile
= objfile
->separate_debug_objfile_backlink
;
14025 /* Return the address size given in the compilation unit header for CU. */
14028 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14031 return per_cu
->cu
->header
.addr_size
;
14034 /* If the CU is not currently read in, we re-read its header. */
14035 struct objfile
*objfile
= per_cu
->objfile
;
14036 struct dwarf2_per_objfile
*per_objfile
14037 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14038 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14039 struct comp_unit_head cu_header
;
14041 memset (&cu_header
, 0, sizeof cu_header
);
14042 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14043 return cu_header
.addr_size
;
14047 /* Return the offset size given in the compilation unit header for CU. */
14050 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14053 return per_cu
->cu
->header
.offset_size
;
14056 /* If the CU is not currently read in, we re-read its header. */
14057 struct objfile
*objfile
= per_cu
->objfile
;
14058 struct dwarf2_per_objfile
*per_objfile
14059 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14060 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14061 struct comp_unit_head cu_header
;
14063 memset (&cu_header
, 0, sizeof cu_header
);
14064 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14065 return cu_header
.offset_size
;
14069 /* Return the text offset of the CU. The returned offset comes from
14070 this CU's objfile. If this objfile came from a separate debuginfo
14071 file, then the offset may be different from the corresponding
14072 offset in the parent objfile. */
14075 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14077 struct objfile
*objfile
= per_cu
->objfile
;
14079 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14082 /* Locate the .debug_info compilation unit from CU's objfile which contains
14083 the DIE at OFFSET. Raises an error on failure. */
14085 static struct dwarf2_per_cu_data
*
14086 dwarf2_find_containing_comp_unit (unsigned int offset
,
14087 struct objfile
*objfile
)
14089 struct dwarf2_per_cu_data
*this_cu
;
14093 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14096 int mid
= low
+ (high
- low
) / 2;
14098 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14103 gdb_assert (low
== high
);
14104 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14107 error (_("Dwarf Error: could not find partial DIE containing "
14108 "offset 0x%lx [in module %s]"),
14109 (long) offset
, bfd_get_filename (objfile
->obfd
));
14111 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14112 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14116 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14117 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14118 && offset
>= this_cu
->offset
+ this_cu
->length
)
14119 error (_("invalid dwarf2 offset %u"), offset
);
14120 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14125 /* Locate the compilation unit from OBJFILE which is located at exactly
14126 OFFSET. Raises an error on failure. */
14128 static struct dwarf2_per_cu_data
*
14129 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14131 struct dwarf2_per_cu_data
*this_cu
;
14133 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14134 if (this_cu
->offset
!= offset
)
14135 error (_("no compilation unit with offset %u."), offset
);
14139 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14141 static struct dwarf2_cu
*
14142 alloc_one_comp_unit (struct objfile
*objfile
)
14144 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
14145 cu
->objfile
= objfile
;
14146 obstack_init (&cu
->comp_unit_obstack
);
14150 /* Release one cached compilation unit, CU. We unlink it from the tree
14151 of compilation units, but we don't remove it from the read_in_chain;
14152 the caller is responsible for that.
14153 NOTE: DATA is a void * because this function is also used as a
14154 cleanup routine. */
14157 free_one_comp_unit (void *data
)
14159 struct dwarf2_cu
*cu
= data
;
14161 if (cu
->per_cu
!= NULL
)
14162 cu
->per_cu
->cu
= NULL
;
14165 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14170 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14171 when we're finished with it. We can't free the pointer itself, but be
14172 sure to unlink it from the cache. Also release any associated storage
14173 and perform cache maintenance.
14175 Only used during partial symbol parsing. */
14178 free_stack_comp_unit (void *data
)
14180 struct dwarf2_cu
*cu
= data
;
14182 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14183 cu
->partial_dies
= NULL
;
14185 if (cu
->per_cu
!= NULL
)
14187 /* This compilation unit is on the stack in our caller, so we
14188 should not xfree it. Just unlink it. */
14189 cu
->per_cu
->cu
= NULL
;
14192 /* If we had a per-cu pointer, then we may have other compilation
14193 units loaded, so age them now. */
14194 age_cached_comp_units ();
14198 /* Free all cached compilation units. */
14201 free_cached_comp_units (void *data
)
14203 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14205 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14206 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14207 while (per_cu
!= NULL
)
14209 struct dwarf2_per_cu_data
*next_cu
;
14211 next_cu
= per_cu
->cu
->read_in_chain
;
14213 free_one_comp_unit (per_cu
->cu
);
14214 *last_chain
= next_cu
;
14220 /* Increase the age counter on each cached compilation unit, and free
14221 any that are too old. */
14224 age_cached_comp_units (void)
14226 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14228 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14229 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14230 while (per_cu
!= NULL
)
14232 per_cu
->cu
->last_used
++;
14233 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14234 dwarf2_mark (per_cu
->cu
);
14235 per_cu
= per_cu
->cu
->read_in_chain
;
14238 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14239 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14240 while (per_cu
!= NULL
)
14242 struct dwarf2_per_cu_data
*next_cu
;
14244 next_cu
= per_cu
->cu
->read_in_chain
;
14246 if (!per_cu
->cu
->mark
)
14248 free_one_comp_unit (per_cu
->cu
);
14249 *last_chain
= next_cu
;
14252 last_chain
= &per_cu
->cu
->read_in_chain
;
14258 /* Remove a single compilation unit from the cache. */
14261 free_one_cached_comp_unit (void *target_cu
)
14263 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14265 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14266 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14267 while (per_cu
!= NULL
)
14269 struct dwarf2_per_cu_data
*next_cu
;
14271 next_cu
= per_cu
->cu
->read_in_chain
;
14273 if (per_cu
->cu
== target_cu
)
14275 free_one_comp_unit (per_cu
->cu
);
14276 *last_chain
= next_cu
;
14280 last_chain
= &per_cu
->cu
->read_in_chain
;
14286 /* Release all extra memory associated with OBJFILE. */
14289 dwarf2_free_objfile (struct objfile
*objfile
)
14291 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14293 if (dwarf2_per_objfile
== NULL
)
14296 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14297 free_cached_comp_units (NULL
);
14299 if (dwarf2_per_objfile
->using_index
)
14303 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
14306 struct dwarf2_per_cu_data
*per_cu
=
14307 dwarf2_per_objfile
->all_comp_units
[i
];
14309 if (!per_cu
->v
.quick
->lines
)
14312 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
14314 if (per_cu
->v
.quick
->file_names
)
14315 xfree ((void *) per_cu
->v
.quick
->file_names
[j
]);
14316 if (per_cu
->v
.quick
->full_names
)
14317 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
14320 free_line_header (per_cu
->v
.quick
->lines
);
14324 /* Everything else should be on the objfile obstack. */
14327 /* A pair of DIE offset and GDB type pointer. We store these
14328 in a hash table separate from the DIEs, and preserve them
14329 when the DIEs are flushed out of cache. */
14331 struct dwarf2_offset_and_type
14333 unsigned int offset
;
14337 /* Hash function for a dwarf2_offset_and_type. */
14340 offset_and_type_hash (const void *item
)
14342 const struct dwarf2_offset_and_type
*ofs
= item
;
14344 return ofs
->offset
;
14347 /* Equality function for a dwarf2_offset_and_type. */
14350 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14352 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14353 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14355 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14358 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14359 table if necessary. For convenience, return TYPE.
14361 The DIEs reading must have careful ordering to:
14362 * Not cause infite loops trying to read in DIEs as a prerequisite for
14363 reading current DIE.
14364 * Not trying to dereference contents of still incompletely read in types
14365 while reading in other DIEs.
14366 * Enable referencing still incompletely read in types just by a pointer to
14367 the type without accessing its fields.
14369 Therefore caller should follow these rules:
14370 * Try to fetch any prerequisite types we may need to build this DIE type
14371 before building the type and calling set_die_type.
14372 * After building type call set_die_type for current DIE as soon as
14373 possible before fetching more types to complete the current type.
14374 * Make the type as complete as possible before fetching more types. */
14376 static struct type
*
14377 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14379 struct dwarf2_offset_and_type
**slot
, ofs
;
14380 struct objfile
*objfile
= cu
->objfile
;
14381 htab_t
*type_hash_ptr
;
14383 /* For Ada types, make sure that the gnat-specific data is always
14384 initialized (if not already set). There are a few types where
14385 we should not be doing so, because the type-specific area is
14386 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14387 where the type-specific area is used to store the floatformat).
14388 But this is not a problem, because the gnat-specific information
14389 is actually not needed for these types. */
14390 if (need_gnat_info (cu
)
14391 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14392 && TYPE_CODE (type
) != TYPE_CODE_FLT
14393 && !HAVE_GNAT_AUX_INFO (type
))
14394 INIT_GNAT_SPECIFIC (type
);
14396 if (cu
->per_cu
->from_debug_types
)
14397 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14399 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14401 if (*type_hash_ptr
== NULL
)
14404 = htab_create_alloc_ex (127,
14405 offset_and_type_hash
,
14406 offset_and_type_eq
,
14408 &objfile
->objfile_obstack
,
14409 hashtab_obstack_allocate
,
14410 dummy_obstack_deallocate
);
14413 ofs
.offset
= die
->offset
;
14415 slot
= (struct dwarf2_offset_and_type
**)
14416 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14418 complaint (&symfile_complaints
,
14419 _("A problem internal to GDB: DIE 0x%x has type already set"),
14421 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14426 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14427 table, or return NULL if the die does not have a saved type. */
14429 static struct type
*
14430 get_die_type_at_offset (unsigned int offset
,
14431 struct dwarf2_per_cu_data
*per_cu
)
14433 struct dwarf2_offset_and_type
*slot
, ofs
;
14436 if (per_cu
->from_debug_types
)
14437 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14439 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14440 if (type_hash
== NULL
)
14443 ofs
.offset
= offset
;
14444 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14451 /* Look up the type for DIE in the appropriate type_hash table,
14452 or return NULL if DIE does not have a saved type. */
14454 static struct type
*
14455 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14457 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14460 /* Add a dependence relationship from CU to REF_PER_CU. */
14463 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14464 struct dwarf2_per_cu_data
*ref_per_cu
)
14468 if (cu
->dependencies
== NULL
)
14470 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14471 NULL
, &cu
->comp_unit_obstack
,
14472 hashtab_obstack_allocate
,
14473 dummy_obstack_deallocate
);
14475 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14477 *slot
= ref_per_cu
;
14480 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14481 Set the mark field in every compilation unit in the
14482 cache that we must keep because we are keeping CU. */
14485 dwarf2_mark_helper (void **slot
, void *data
)
14487 struct dwarf2_per_cu_data
*per_cu
;
14489 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14490 if (per_cu
->cu
->mark
)
14492 per_cu
->cu
->mark
= 1;
14494 if (per_cu
->cu
->dependencies
!= NULL
)
14495 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14500 /* Set the mark field in CU and in every other compilation unit in the
14501 cache that we must keep because we are keeping CU. */
14504 dwarf2_mark (struct dwarf2_cu
*cu
)
14509 if (cu
->dependencies
!= NULL
)
14510 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14514 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14518 per_cu
->cu
->mark
= 0;
14519 per_cu
= per_cu
->cu
->read_in_chain
;
14523 /* Trivial hash function for partial_die_info: the hash value of a DIE
14524 is its offset in .debug_info for this objfile. */
14527 partial_die_hash (const void *item
)
14529 const struct partial_die_info
*part_die
= item
;
14531 return part_die
->offset
;
14534 /* Trivial comparison function for partial_die_info structures: two DIEs
14535 are equal if they have the same offset. */
14538 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14540 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14541 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14543 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14546 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14547 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14550 set_dwarf2_cmd (char *args
, int from_tty
)
14552 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14556 show_dwarf2_cmd (char *args
, int from_tty
)
14558 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14561 /* If section described by INFO was mmapped, munmap it now. */
14564 munmap_section_buffer (struct dwarf2_section_info
*info
)
14566 if (info
->was_mmapped
)
14569 intptr_t begin
= (intptr_t) info
->buffer
;
14570 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14571 size_t map_length
= info
->size
+ begin
- map_begin
;
14573 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14575 /* Without HAVE_MMAP, we should never be here to begin with. */
14576 gdb_assert_not_reached ("no mmap support");
14581 /* munmap debug sections for OBJFILE, if necessary. */
14584 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14586 struct dwarf2_per_objfile
*data
= d
;
14588 /* This is sorted according to the order they're defined in to make it easier
14589 to keep in sync. */
14590 munmap_section_buffer (&data
->info
);
14591 munmap_section_buffer (&data
->abbrev
);
14592 munmap_section_buffer (&data
->line
);
14593 munmap_section_buffer (&data
->loc
);
14594 munmap_section_buffer (&data
->macinfo
);
14595 munmap_section_buffer (&data
->str
);
14596 munmap_section_buffer (&data
->ranges
);
14597 munmap_section_buffer (&data
->types
);
14598 munmap_section_buffer (&data
->frame
);
14599 munmap_section_buffer (&data
->eh_frame
);
14600 munmap_section_buffer (&data
->gdb_index
);
14605 /* The contents of the hash table we create when building the string
14607 struct strtab_entry
14609 offset_type offset
;
14613 /* Hash function for a strtab_entry. */
14615 hash_strtab_entry (const void *e
)
14617 const struct strtab_entry
*entry
= e
;
14618 return mapped_index_string_hash (entry
->str
);
14621 /* Equality function for a strtab_entry. */
14623 eq_strtab_entry (const void *a
, const void *b
)
14625 const struct strtab_entry
*ea
= a
;
14626 const struct strtab_entry
*eb
= b
;
14627 return !strcmp (ea
->str
, eb
->str
);
14630 /* Create a strtab_entry hash table. */
14632 create_strtab (void)
14634 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
14635 xfree
, xcalloc
, xfree
);
14638 /* Add a string to the constant pool. Return the string's offset in
14641 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
14644 struct strtab_entry entry
;
14645 struct strtab_entry
*result
;
14648 slot
= htab_find_slot (table
, &entry
, INSERT
);
14653 result
= XNEW (struct strtab_entry
);
14654 result
->offset
= obstack_object_size (cpool
);
14656 obstack_grow_str0 (cpool
, str
);
14659 return result
->offset
;
14662 /* An entry in the symbol table. */
14663 struct symtab_index_entry
14665 /* The name of the symbol. */
14667 /* The offset of the name in the constant pool. */
14668 offset_type index_offset
;
14669 /* A sorted vector of the indices of all the CUs that hold an object
14671 VEC (offset_type
) *cu_indices
;
14674 /* The symbol table. This is a power-of-2-sized hash table. */
14675 struct mapped_symtab
14677 offset_type n_elements
;
14679 struct symtab_index_entry
**data
;
14682 /* Hash function for a symtab_index_entry. */
14684 hash_symtab_entry (const void *e
)
14686 const struct symtab_index_entry
*entry
= e
;
14687 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
14688 sizeof (offset_type
) * VEC_length (offset_type
,
14689 entry
->cu_indices
),
14693 /* Equality function for a symtab_index_entry. */
14695 eq_symtab_entry (const void *a
, const void *b
)
14697 const struct symtab_index_entry
*ea
= a
;
14698 const struct symtab_index_entry
*eb
= b
;
14699 int len
= VEC_length (offset_type
, ea
->cu_indices
);
14700 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
14702 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
14703 VEC_address (offset_type
, eb
->cu_indices
),
14704 sizeof (offset_type
) * len
);
14707 /* Destroy a symtab_index_entry. */
14709 delete_symtab_entry (void *p
)
14711 struct symtab_index_entry
*entry
= p
;
14712 VEC_free (offset_type
, entry
->cu_indices
);
14716 /* Create a hash table holding symtab_index_entry objects. */
14718 create_index_table (void)
14720 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
14721 delete_symtab_entry
, xcalloc
, xfree
);
14724 /* Create a new mapped symtab object. */
14725 static struct mapped_symtab
*
14726 create_mapped_symtab (void)
14728 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
14729 symtab
->n_elements
= 0;
14730 symtab
->size
= 1024;
14731 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14735 /* Destroy a mapped_symtab. */
14737 cleanup_mapped_symtab (void *p
)
14739 struct mapped_symtab
*symtab
= p
;
14740 /* The contents of the array are freed when the other hash table is
14742 xfree (symtab
->data
);
14746 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14748 static struct symtab_index_entry
**
14749 find_slot (struct mapped_symtab
*symtab
, const char *name
)
14751 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
14753 index
= hash
& (symtab
->size
- 1);
14754 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
14758 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
14759 return &symtab
->data
[index
];
14760 index
= (index
+ step
) & (symtab
->size
- 1);
14764 /* Expand SYMTAB's hash table. */
14766 hash_expand (struct mapped_symtab
*symtab
)
14768 offset_type old_size
= symtab
->size
;
14770 struct symtab_index_entry
**old_entries
= symtab
->data
;
14773 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14775 for (i
= 0; i
< old_size
; ++i
)
14777 if (old_entries
[i
])
14779 struct symtab_index_entry
**slot
= find_slot (symtab
,
14780 old_entries
[i
]->name
);
14781 *slot
= old_entries
[i
];
14785 xfree (old_entries
);
14788 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14789 is the index of the CU in which the symbol appears. */
14791 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
14792 offset_type cu_index
)
14794 struct symtab_index_entry
**slot
;
14796 ++symtab
->n_elements
;
14797 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
14798 hash_expand (symtab
);
14800 slot
= find_slot (symtab
, name
);
14803 *slot
= XNEW (struct symtab_index_entry
);
14804 (*slot
)->name
= name
;
14805 (*slot
)->cu_indices
= NULL
;
14807 /* Don't push an index twice. Due to how we add entries we only
14808 have to check the last one. */
14809 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
14810 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
14811 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
14814 /* Add a vector of indices to the constant pool. */
14816 add_indices_to_cpool (htab_t index_table
, struct obstack
*cpool
,
14817 struct symtab_index_entry
*entry
)
14821 slot
= htab_find_slot (index_table
, entry
, INSERT
);
14824 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
14825 offset_type val
= MAYBE_SWAP (len
);
14830 entry
->index_offset
= obstack_object_size (cpool
);
14832 obstack_grow (cpool
, &val
, sizeof (val
));
14834 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
14837 val
= MAYBE_SWAP (iter
);
14838 obstack_grow (cpool
, &val
, sizeof (val
));
14843 struct symtab_index_entry
*old_entry
= *slot
;
14844 entry
->index_offset
= old_entry
->index_offset
;
14847 return entry
->index_offset
;
14850 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14851 constant pool entries going into the obstack CPOOL. */
14853 write_hash_table (struct mapped_symtab
*symtab
,
14854 struct obstack
*output
, struct obstack
*cpool
)
14857 htab_t index_table
;
14860 index_table
= create_index_table ();
14861 str_table
= create_strtab ();
14862 /* We add all the index vectors to the constant pool first, to
14863 ensure alignment is ok. */
14864 for (i
= 0; i
< symtab
->size
; ++i
)
14866 if (symtab
->data
[i
])
14867 add_indices_to_cpool (index_table
, cpool
, symtab
->data
[i
]);
14870 /* Now write out the hash table. */
14871 for (i
= 0; i
< symtab
->size
; ++i
)
14873 offset_type str_off
, vec_off
;
14875 if (symtab
->data
[i
])
14877 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
14878 vec_off
= symtab
->data
[i
]->index_offset
;
14882 /* While 0 is a valid constant pool index, it is not valid
14883 to have 0 for both offsets. */
14888 str_off
= MAYBE_SWAP (str_off
);
14889 vec_off
= MAYBE_SWAP (vec_off
);
14891 obstack_grow (output
, &str_off
, sizeof (str_off
));
14892 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
14895 htab_delete (str_table
);
14896 htab_delete (index_table
);
14899 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14900 from PST; CU_INDEX is the index of the CU in the vector of all
14903 add_address_entry (struct objfile
*objfile
,
14904 struct obstack
*addr_obstack
, struct partial_symtab
*pst
,
14905 unsigned int cu_index
)
14907 offset_type offset
;
14909 CORE_ADDR baseaddr
;
14911 /* Don't bother recording empty ranges. */
14912 if (pst
->textlow
== pst
->texthigh
)
14915 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14917 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->textlow
- baseaddr
);
14918 obstack_grow (addr_obstack
, addr
, 8);
14919 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->texthigh
- baseaddr
);
14920 obstack_grow (addr_obstack
, addr
, 8);
14921 offset
= MAYBE_SWAP (cu_index
);
14922 obstack_grow (addr_obstack
, &offset
, sizeof (offset_type
));
14925 /* Add a list of partial symbols to SYMTAB. */
14927 write_psymbols (struct mapped_symtab
*symtab
,
14928 struct partial_symbol
**psymp
,
14930 offset_type cu_index
)
14932 for (; count
-- > 0; ++psymp
)
14934 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
14935 error (_("Ada is not currently supported by the index"));
14936 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
14940 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14941 exception if there is an error. */
14943 write_obstack (FILE *file
, struct obstack
*obstack
)
14945 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
14947 != obstack_object_size (obstack
))
14948 error (_("couldn't data write to file"));
14951 /* Unlink a file if the argument is not NULL. */
14953 unlink_if_set (void *p
)
14955 char **filename
= p
;
14957 unlink (*filename
);
14960 /* A helper struct used when iterating over debug_types. */
14961 struct signatured_type_index_data
14963 struct objfile
*objfile
;
14964 struct mapped_symtab
*symtab
;
14965 struct obstack
*types_list
;
14969 /* A helper function that writes a single signatured_type to an
14972 write_one_signatured_type (void **slot
, void *d
)
14974 struct signatured_type_index_data
*info
= d
;
14975 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
14976 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
14977 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
14980 write_psymbols (info
->symtab
,
14981 info
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
14982 psymtab
->n_global_syms
, info
->cu_index
);
14983 write_psymbols (info
->symtab
,
14984 info
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
14985 psymtab
->n_static_syms
, info
->cu_index
);
14987 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
14988 obstack_grow (info
->types_list
, val
, 8);
14989 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
14990 obstack_grow (info
->types_list
, val
, 8);
14991 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
14992 obstack_grow (info
->types_list
, val
, 8);
14999 /* Create an index file for OBJFILE in the directory DIR. */
15001 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
15003 struct cleanup
*cleanup
;
15004 char *filename
, *cleanup_filename
;
15005 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
15006 struct obstack cu_list
, types_cu_list
;
15009 struct mapped_symtab
*symtab
;
15010 offset_type val
, size_of_contents
, total_len
;
15014 if (!objfile
->psymtabs
)
15016 if (dwarf2_per_objfile
->using_index
)
15017 error (_("Cannot use an index to create the index"));
15019 if (stat (objfile
->name
, &st
) < 0)
15020 perror_with_name (_("Could not stat"));
15022 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15023 INDEX_SUFFIX
, (char *) NULL
);
15024 cleanup
= make_cleanup (xfree
, filename
);
15026 out_file
= fopen (filename
, "wb");
15028 error (_("Can't open `%s' for writing"), filename
);
15030 cleanup_filename
= filename
;
15031 make_cleanup (unlink_if_set
, &cleanup_filename
);
15033 symtab
= create_mapped_symtab ();
15034 make_cleanup (cleanup_mapped_symtab
, symtab
);
15036 obstack_init (&addr_obstack
);
15037 make_cleanup_obstack_free (&addr_obstack
);
15039 obstack_init (&cu_list
);
15040 make_cleanup_obstack_free (&cu_list
);
15042 obstack_init (&types_cu_list
);
15043 make_cleanup_obstack_free (&types_cu_list
);
15045 /* The list is already sorted, so we don't need to do additional
15046 work here. Also, the debug_types entries do not appear in
15047 all_comp_units, but only in their own hash table. */
15048 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15050 struct dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->all_comp_units
[i
];
15051 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15054 write_psymbols (symtab
,
15055 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15056 psymtab
->n_global_syms
, i
);
15057 write_psymbols (symtab
,
15058 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15059 psymtab
->n_static_syms
, i
);
15061 add_address_entry (objfile
, &addr_obstack
, psymtab
, i
);
15063 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15064 obstack_grow (&cu_list
, val
, 8);
15065 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15066 obstack_grow (&cu_list
, val
, 8);
15069 /* Write out the .debug_type entries, if any. */
15070 if (dwarf2_per_objfile
->signatured_types
)
15072 struct signatured_type_index_data sig_data
;
15074 sig_data
.objfile
= objfile
;
15075 sig_data
.symtab
= symtab
;
15076 sig_data
.types_list
= &types_cu_list
;
15077 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15078 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15079 write_one_signatured_type
, &sig_data
);
15082 obstack_init (&constant_pool
);
15083 make_cleanup_obstack_free (&constant_pool
);
15084 obstack_init (&symtab_obstack
);
15085 make_cleanup_obstack_free (&symtab_obstack
);
15086 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15088 obstack_init (&contents
);
15089 make_cleanup_obstack_free (&contents
);
15090 size_of_contents
= 6 * sizeof (offset_type
);
15091 total_len
= size_of_contents
;
15093 /* The version number. */
15094 val
= MAYBE_SWAP (2);
15095 obstack_grow (&contents
, &val
, sizeof (val
));
15097 /* The offset of the CU list from the start of the file. */
15098 val
= MAYBE_SWAP (total_len
);
15099 obstack_grow (&contents
, &val
, sizeof (val
));
15100 total_len
+= obstack_object_size (&cu_list
);
15102 /* The offset of the types CU list from the start of the file. */
15103 val
= MAYBE_SWAP (total_len
);
15104 obstack_grow (&contents
, &val
, sizeof (val
));
15105 total_len
+= obstack_object_size (&types_cu_list
);
15107 /* The offset of the address table from the start of the file. */
15108 val
= MAYBE_SWAP (total_len
);
15109 obstack_grow (&contents
, &val
, sizeof (val
));
15110 total_len
+= obstack_object_size (&addr_obstack
);
15112 /* The offset of the symbol table from the start of the file. */
15113 val
= MAYBE_SWAP (total_len
);
15114 obstack_grow (&contents
, &val
, sizeof (val
));
15115 total_len
+= obstack_object_size (&symtab_obstack
);
15117 /* The offset of the constant pool from the start of the file. */
15118 val
= MAYBE_SWAP (total_len
);
15119 obstack_grow (&contents
, &val
, sizeof (val
));
15120 total_len
+= obstack_object_size (&constant_pool
);
15122 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15124 write_obstack (out_file
, &contents
);
15125 write_obstack (out_file
, &cu_list
);
15126 write_obstack (out_file
, &types_cu_list
);
15127 write_obstack (out_file
, &addr_obstack
);
15128 write_obstack (out_file
, &symtab_obstack
);
15129 write_obstack (out_file
, &constant_pool
);
15133 /* We want to keep the file, so we set cleanup_filename to NULL
15134 here. See unlink_if_set. */
15135 cleanup_filename
= NULL
;
15137 do_cleanups (cleanup
);
15140 /* The mapped index file format is designed to be directly mmap()able
15141 on any architecture. In most cases, a datum is represented using a
15142 little-endian 32-bit integer value, called an offset_type. Big
15143 endian machines must byte-swap the values before using them.
15144 Exceptions to this rule are noted. The data is laid out such that
15145 alignment is always respected.
15147 A mapped index consists of several sections.
15149 1. The file header. This is a sequence of values, of offset_type
15150 unless otherwise noted:
15151 [0] The version number. Currently 1 or 2. The differences are
15152 noted below. Version 1 did not account for .debug_types sections;
15153 the presence of a .debug_types section invalidates any version 1
15154 index that may exist.
15155 [1] The offset, from the start of the file, of the CU list.
15156 [1.5] In version 2, the offset, from the start of the file, of the
15157 types CU list. This offset does not appear in version 1. Note
15158 that this can be empty, in which case this offset will be equal to
15160 [2] The offset, from the start of the file, of the address section.
15161 [3] The offset, from the start of the file, of the symbol table.
15162 [4] The offset, from the start of the file, of the constant pool.
15164 2. The CU list. This is a sequence of pairs of 64-bit
15165 little-endian values, sorted by the CU offset. The first element
15166 in each pair is the offset of a CU in the .debug_info section. The
15167 second element in each pair is the length of that CU. References
15168 to a CU elsewhere in the map are done using a CU index, which is
15169 just the 0-based index into this table. Note that if there are
15170 type CUs, then conceptually CUs and type CUs form a single list for
15171 the purposes of CU indices.
15173 2.5 The types CU list. This does not appear in a version 1 index.
15174 This is a sequence of triplets of 64-bit little-endian values. In
15175 a triplet, the first value is the CU offset, the second value is
15176 the type offset in the CU, and the third value is the type
15177 signature. The types CU list is not sorted.
15179 3. The address section. The address section consists of a sequence
15180 of address entries. Each address entry has three elements.
15181 [0] The low address. This is a 64-bit little-endian value.
15182 [1] The high address. This is a 64-bit little-endian value.
15183 [2] The CU index. This is an offset_type value.
15185 4. The symbol table. This is a hash table. The size of the hash
15186 table is always a power of 2. The initial hash and the step are
15187 currently defined by the `find_slot' function.
15189 Each slot in the hash table consists of a pair of offset_type
15190 values. The first value is the offset of the symbol's name in the
15191 constant pool. The second value is the offset of the CU vector in
15194 If both values are 0, then this slot in the hash table is empty.
15195 This is ok because while 0 is a valid constant pool index, it
15196 cannot be a valid index for both a string and a CU vector.
15198 A string in the constant pool is stored as a \0-terminated string,
15201 A CU vector in the constant pool is a sequence of offset_type
15202 values. The first value is the number of CU indices in the vector.
15203 Each subsequent value is the index of a CU in the CU list. This
15204 element in the hash table is used to indicate which CUs define the
15207 5. The constant pool. This is simply a bunch of bytes. It is
15208 organized so that alignment is correct: CU vectors are stored
15209 first, followed by strings. */
15211 save_gdb_index_command (char *arg
, int from_tty
)
15213 struct objfile
*objfile
;
15216 error (_("usage: save gdb-index DIRECTORY"));
15218 ALL_OBJFILES (objfile
)
15222 /* If the objfile does not correspond to an actual file, skip it. */
15223 if (stat (objfile
->name
, &st
) < 0)
15226 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15227 if (dwarf2_per_objfile
)
15229 volatile struct gdb_exception except
;
15231 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15233 write_psymtabs_to_index (objfile
, arg
);
15235 if (except
.reason
< 0)
15236 exception_fprintf (gdb_stderr
, except
,
15237 _("Error while writing index for `%s': "),
15245 int dwarf2_always_disassemble
;
15248 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15249 struct cmd_list_element
*c
, const char *value
)
15251 fprintf_filtered (file
, _("\
15252 Whether to always disassemble DWARF expressions is %s.\n"),
15256 void _initialize_dwarf2_read (void);
15259 _initialize_dwarf2_read (void)
15261 struct cmd_list_element
*c
;
15263 dwarf2_objfile_data_key
15264 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15266 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15267 Set DWARF 2 specific variables.\n\
15268 Configure DWARF 2 variables such as the cache size"),
15269 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15270 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15272 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15273 Show DWARF 2 specific variables\n\
15274 Show DWARF 2 variables such as the cache size"),
15275 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15276 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15278 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15279 &dwarf2_max_cache_age
, _("\
15280 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15281 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15282 A higher limit means that cached compilation units will be stored\n\
15283 in memory longer, and more total memory will be used. Zero disables\n\
15284 caching, which can slow down startup."),
15286 show_dwarf2_max_cache_age
,
15287 &set_dwarf2_cmdlist
,
15288 &show_dwarf2_cmdlist
);
15290 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15291 &dwarf2_always_disassemble
, _("\
15292 Set whether `info address' always disassembles DWARF expressions."), _("\
15293 Show whether `info address' always disassembles DWARF expressions."), _("\
15294 When enabled, DWARF expressions are always printed in an assembly-like\n\
15295 syntax. When disabled, expressions will be printed in a more\n\
15296 conversational style, when possible."),
15298 show_dwarf2_always_disassemble
,
15299 &set_dwarf2_cmdlist
,
15300 &show_dwarf2_cmdlist
);
15302 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15303 Set debugging of the dwarf2 DIE reader."), _("\
15304 Show debugging of the dwarf2 DIE reader."), _("\
15305 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15306 The value is the maximum depth to print."),
15309 &setdebuglist
, &showdebuglist
);
15311 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15312 _("Save a .gdb-index file"),
15314 set_cmd_completer (c
, filename_completer
);